help
This driver supports the 10/100 Ethernet Lite from Xilinx.
-config FTMAC100
- tristate "Faraday FTMAC100 10/100 Ethernet support"
- depends on ARM
- select MII
- help
- This driver supports the FTMAC100 10/100 Ethernet controller
- from Faraday. It is used on Faraday A320, Andes AG101 and some
- other ARM/NDS32 SoC's.
-
config LANTIQ_ETOP
tristate "Lantiq SoC ETOP driver"
depends on SOC_TYPE_XWAY
ML7223 is companion chip for Intel Atom E6xx series.
ML7223 is completely compatible for Intel EG20T PCH.
-config FTGMAC100
- tristate "Faraday FTGMAC100 Gigabit Ethernet support"
- depends on ARM
- select PHYLIB
- help
- This driver supports the FTGMAC100 Gigabit Ethernet controller
- from Faraday. It is used on Faraday A369, Andes AG102 and some
- other ARM/NDS32 SoC's.
-
endif # NETDEV_1000
#
obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o
endif
obj-$(CONFIG_FORCEDETH) += forcedeth.o
-obj-$(CONFIG_FTGMAC100) += ftgmac100.o
-obj-$(CONFIG_FTMAC100) += ftmac100.o
obj-$(CONFIG_TSI108_ETH) += tsi108_eth.o
obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o
source "drivers/net/ethernet/cisco/Kconfig"
source "drivers/net/ethernet/emulex/Kconfig"
source "drivers/net/ethernet/neterion/Kconfig"
+source "drivers/net/ethernet/faraday/Kconfig"
source "drivers/net/ethernet/ibm/Kconfig"
source "drivers/net/ethernet/intel/Kconfig"
source "drivers/net/ethernet/i825xx/Kconfig"
obj-$(CONFIG_NET_VENDOR_CISCO) += cisco/
obj-$(CONFIG_NET_VENDOR_EMULEX) += emulex/
obj-$(CONFIG_NET_VENDOR_EXAR) += neterion/
+obj-$(CONFIG_NET_VENDOR_FARADAY) += faraday/
obj-$(CONFIG_NET_VENDOR_IBM) += ibm/
obj-$(CONFIG_NET_VENDOR_INTEL) += intel/
obj-$(CONFIG_NET_VENDOR_I825XX) += i825xx/
--- /dev/null
+#
+# Faraday device configuration
+#
+
+config NET_VENDOR_FARADAY
+ bool "Faraday devices"
+ depends on ARM
+ ---help---
+ If you have a network (Ethernet) card belonging to this class, say Y
+ and read the Ethernet-HOWTO, available from
+ <http://www.tldp.org/docs.html#howto>.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the questions about Faraday cards. If you say Y, you will be asked for
+ your specific card in the following questions.
+
+if NET_VENDOR_FARADAY
+
+config FTMAC100
+ tristate "Faraday FTMAC100 10/100 Ethernet support"
+ depends on ARM
+ select MII
+ ---help---
+ This driver supports the FTMAC100 10/100 Ethernet controller
+ from Faraday. It is used on Faraday A320, Andes AG101 and some
+ other ARM/NDS32 SoC's.
+
+config FTGMAC100
+ tristate "Faraday FTGMAC100 Gigabit Ethernet support"
+ depends on ARM
+ select PHYLIB
+ ---help---
+ This driver supports the FTGMAC100 Gigabit Ethernet controller
+ from Faraday. It is used on Faraday A369, Andes AG102 and some
+ other ARM/NDS32 SoC's.
+
+endif # NET_VENDOR_FARADAY
--- /dev/null
+#
+# Makefile for the Faraday device drivers.
+#
+
+obj-$(CONFIG_FTGMAC100) += ftgmac100.o
+obj-$(CONFIG_FTMAC100) += ftmac100.o
--- /dev/null
+/*
+ * Faraday FTGMAC100 Gigabit Ethernet
+ *
+ * (C) Copyright 2009-2011 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <net/ip.h>
+
+#include "ftgmac100.h"
+
+#define DRV_NAME "ftgmac100"
+#define DRV_VERSION "0.7"
+
+#define RX_QUEUE_ENTRIES 256 /* must be power of 2 */
+#define TX_QUEUE_ENTRIES 512 /* must be power of 2 */
+
+#define MAX_PKT_SIZE 1518
+#define RX_BUF_SIZE PAGE_SIZE /* must be smaller than 0x3fff */
+
+/******************************************************************************
+ * private data
+ *****************************************************************************/
+struct ftgmac100_descs {
+ struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
+ struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
+};
+
+struct ftgmac100 {
+ struct resource *res;
+ void __iomem *base;
+ int irq;
+
+ struct ftgmac100_descs *descs;
+ dma_addr_t descs_dma_addr;
+
+ unsigned int rx_pointer;
+ unsigned int tx_clean_pointer;
+ unsigned int tx_pointer;
+ unsigned int tx_pending;
+
+ spinlock_t tx_lock;
+
+ struct net_device *netdev;
+ struct device *dev;
+ struct napi_struct napi;
+
+ struct mii_bus *mii_bus;
+ int phy_irq[PHY_MAX_ADDR];
+ struct phy_device *phydev;
+ int old_speed;
+};
+
+static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
+ struct ftgmac100_rxdes *rxdes, gfp_t gfp);
+
+/******************************************************************************
+ * internal functions (hardware register access)
+ *****************************************************************************/
+#define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
+ FTGMAC100_INT_XPKT_ETH | \
+ FTGMAC100_INT_XPKT_LOST | \
+ FTGMAC100_INT_AHB_ERR | \
+ FTGMAC100_INT_PHYSTS_CHG | \
+ FTGMAC100_INT_RPKT_BUF | \
+ FTGMAC100_INT_NO_RXBUF)
+
+static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
+{
+ iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
+}
+
+static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
+ unsigned int size)
+{
+ size = FTGMAC100_RBSR_SIZE(size);
+ iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
+}
+
+static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
+ dma_addr_t addr)
+{
+ iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
+}
+
+static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
+{
+ iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
+}
+
+static int ftgmac100_reset_hw(struct ftgmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ int i;
+
+ /* NOTE: reset clears all registers */
+ iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
+ for (i = 0; i < 5; i++) {
+ unsigned int maccr;
+
+ maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
+ if (!(maccr & FTGMAC100_MACCR_SW_RST))
+ return 0;
+
+ udelay(1000);
+ }
+
+ netdev_err(netdev, "software reset failed\n");
+ return -EIO;
+}
+
+static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
+{
+ unsigned int maddr = mac[0] << 8 | mac[1];
+ unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
+
+ iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
+ iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
+}
+
+static void ftgmac100_init_hw(struct ftgmac100 *priv)
+{
+ /* setup ring buffer base registers */
+ ftgmac100_set_rx_ring_base(priv,
+ priv->descs_dma_addr +
+ offsetof(struct ftgmac100_descs, rxdes));
+ ftgmac100_set_normal_prio_tx_ring_base(priv,
+ priv->descs_dma_addr +
+ offsetof(struct ftgmac100_descs, txdes));
+
+ ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
+
+ iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
+
+ ftgmac100_set_mac(priv, priv->netdev->dev_addr);
+}
+
+#define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
+ FTGMAC100_MACCR_RXDMA_EN | \
+ FTGMAC100_MACCR_TXMAC_EN | \
+ FTGMAC100_MACCR_RXMAC_EN | \
+ FTGMAC100_MACCR_FULLDUP | \
+ FTGMAC100_MACCR_CRC_APD | \
+ FTGMAC100_MACCR_RX_RUNT | \
+ FTGMAC100_MACCR_RX_BROADPKT)
+
+static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
+{
+ int maccr = MACCR_ENABLE_ALL;
+
+ switch (speed) {
+ default:
+ case 10:
+ break;
+
+ case 100:
+ maccr |= FTGMAC100_MACCR_FAST_MODE;
+ break;
+
+ case 1000:
+ maccr |= FTGMAC100_MACCR_GIGA_MODE;
+ break;
+ }
+
+ iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
+}
+
+static void ftgmac100_stop_hw(struct ftgmac100 *priv)
+{
+ iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
+}
+
+/******************************************************************************
+ * internal functions (receive descriptor)
+ *****************************************************************************/
+static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
+}
+
+static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
+}
+
+static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
+}
+
+static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
+{
+ /* clear status bits */
+ rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
+}
+
+static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
+}
+
+static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
+}
+
+static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
+}
+
+static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
+}
+
+static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
+}
+
+static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
+{
+ return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
+}
+
+static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
+}
+
+static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
+{
+ rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
+}
+
+static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
+ dma_addr_t addr)
+{
+ rxdes->rxdes3 = cpu_to_le32(addr);
+}
+
+static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
+{
+ return le32_to_cpu(rxdes->rxdes3);
+}
+
+static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
+{
+ return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
+ cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
+}
+
+static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
+{
+ return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
+ cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
+}
+
+static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
+}
+
+static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
+}
+
+static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
+}
+
+/*
+ * rxdes2 is not used by hardware. We use it to keep track of page.
+ * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
+ */
+static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
+{
+ rxdes->rxdes2 = (unsigned int)page;
+}
+
+static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
+{
+ return (struct page *)rxdes->rxdes2;
+}
+
+/******************************************************************************
+ * internal functions (receive)
+ *****************************************************************************/
+static int ftgmac100_next_rx_pointer(int pointer)
+{
+ return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
+}
+
+static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
+{
+ priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
+}
+
+static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
+{
+ return &priv->descs->rxdes[priv->rx_pointer];
+}
+
+static struct ftgmac100_rxdes *
+ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
+{
+ struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
+
+ while (ftgmac100_rxdes_packet_ready(rxdes)) {
+ if (ftgmac100_rxdes_first_segment(rxdes))
+ return rxdes;
+
+ ftgmac100_rxdes_set_dma_own(rxdes);
+ ftgmac100_rx_pointer_advance(priv);
+ rxdes = ftgmac100_current_rxdes(priv);
+ }
+
+ return NULL;
+}
+
+static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
+ struct ftgmac100_rxdes *rxdes)
+{
+ struct net_device *netdev = priv->netdev;
+ bool error = false;
+
+ if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx err\n");
+
+ netdev->stats.rx_errors++;
+ error = true;
+ }
+
+ if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx crc err\n");
+
+ netdev->stats.rx_crc_errors++;
+ error = true;
+ } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx IP checksum err\n");
+
+ error = true;
+ }
+
+ if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx frame too long\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx runt\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx odd nibble\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ }
+
+ return error;
+}
+
+static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
+ bool done = false;
+
+ if (net_ratelimit())
+ netdev_dbg(netdev, "drop packet %p\n", rxdes);
+
+ do {
+ if (ftgmac100_rxdes_last_segment(rxdes))
+ done = true;
+
+ ftgmac100_rxdes_set_dma_own(rxdes);
+ ftgmac100_rx_pointer_advance(priv);
+ rxdes = ftgmac100_current_rxdes(priv);
+ } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
+
+ netdev->stats.rx_dropped++;
+}
+
+static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftgmac100_rxdes *rxdes;
+ struct sk_buff *skb;
+ bool done = false;
+
+ rxdes = ftgmac100_rx_locate_first_segment(priv);
+ if (!rxdes)
+ return false;
+
+ if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
+ ftgmac100_rx_drop_packet(priv);
+ return true;
+ }
+
+ /* start processing */
+ skb = netdev_alloc_skb_ip_align(netdev, 128);
+ if (unlikely(!skb)) {
+ if (net_ratelimit())
+ netdev_err(netdev, "rx skb alloc failed\n");
+
+ ftgmac100_rx_drop_packet(priv);
+ return true;
+ }
+
+ if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
+ netdev->stats.multicast++;
+
+ /*
+ * It seems that HW does checksum incorrectly with fragmented packets,
+ * so we are conservative here - if HW checksum error, let software do
+ * the checksum again.
+ */
+ if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
+ (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+
+ do {
+ dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
+ struct page *page = ftgmac100_rxdes_get_page(rxdes);
+ unsigned int size;
+
+ dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
+
+ size = ftgmac100_rxdes_data_length(rxdes);
+ skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
+
+ skb->len += size;
+ skb->data_len += size;
+ skb->truesize += size;
+
+ if (ftgmac100_rxdes_last_segment(rxdes))
+ done = true;
+
+ ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
+
+ ftgmac100_rx_pointer_advance(priv);
+ rxdes = ftgmac100_current_rxdes(priv);
+ } while (!done);
+
+ __pskb_pull_tail(skb, min(skb->len, 64U));
+ skb->protocol = eth_type_trans(skb, netdev);
+
+ netdev->stats.rx_packets++;
+ netdev->stats.rx_bytes += skb->len;
+
+ /* push packet to protocol stack */
+ napi_gro_receive(&priv->napi, skb);
+
+ (*processed)++;
+ return true;
+}
+
+/******************************************************************************
+ * internal functions (transmit descriptor)
+ *****************************************************************************/
+static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
+{
+ /* clear all except end of ring bit */
+ txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
+ txdes->txdes1 = 0;
+ txdes->txdes2 = 0;
+ txdes->txdes3 = 0;
+}
+
+static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
+{
+ return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
+}
+
+static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
+{
+ /*
+ * Make sure dma own bit will not be set before any other
+ * descriptor fields.
+ */
+ wmb();
+ txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
+}
+
+static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
+}
+
+static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
+}
+
+static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
+}
+
+static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
+ unsigned int len)
+{
+ txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
+}
+
+static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
+}
+
+static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
+}
+
+static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
+}
+
+static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
+}
+
+static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
+ dma_addr_t addr)
+{
+ txdes->txdes3 = cpu_to_le32(addr);
+}
+
+static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
+{
+ return le32_to_cpu(txdes->txdes3);
+}
+
+/*
+ * txdes2 is not used by hardware. We use it to keep track of socket buffer.
+ * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
+ */
+static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
+ struct sk_buff *skb)
+{
+ txdes->txdes2 = (unsigned int)skb;
+}
+
+static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
+{
+ return (struct sk_buff *)txdes->txdes2;
+}
+
+/******************************************************************************
+ * internal functions (transmit)
+ *****************************************************************************/
+static int ftgmac100_next_tx_pointer(int pointer)
+{
+ return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
+}
+
+static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
+{
+ priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
+}
+
+static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
+{
+ priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
+}
+
+static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
+{
+ return &priv->descs->txdes[priv->tx_pointer];
+}
+
+static struct ftgmac100_txdes *
+ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
+{
+ return &priv->descs->txdes[priv->tx_clean_pointer];
+}
+
+static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftgmac100_txdes *txdes;
+ struct sk_buff *skb;
+ dma_addr_t map;
+
+ if (priv->tx_pending == 0)
+ return false;
+
+ txdes = ftgmac100_current_clean_txdes(priv);
+
+ if (ftgmac100_txdes_owned_by_dma(txdes))
+ return false;
+
+ skb = ftgmac100_txdes_get_skb(txdes);
+ map = ftgmac100_txdes_get_dma_addr(txdes);
+
+ netdev->stats.tx_packets++;
+ netdev->stats.tx_bytes += skb->len;
+
+ dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
+
+ dev_kfree_skb(skb);
+
+ ftgmac100_txdes_reset(txdes);
+
+ ftgmac100_tx_clean_pointer_advance(priv);
+
+ spin_lock(&priv->tx_lock);
+ priv->tx_pending--;
+ spin_unlock(&priv->tx_lock);
+ netif_wake_queue(netdev);
+
+ return true;
+}
+
+static void ftgmac100_tx_complete(struct ftgmac100 *priv)
+{
+ while (ftgmac100_tx_complete_packet(priv))
+ ;
+}
+
+static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
+ dma_addr_t map)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftgmac100_txdes *txdes;
+ unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
+
+ txdes = ftgmac100_current_txdes(priv);
+ ftgmac100_tx_pointer_advance(priv);
+
+ /* setup TX descriptor */
+ ftgmac100_txdes_set_skb(txdes, skb);
+ ftgmac100_txdes_set_dma_addr(txdes, map);
+ ftgmac100_txdes_set_buffer_size(txdes, len);
+
+ ftgmac100_txdes_set_first_segment(txdes);
+ ftgmac100_txdes_set_last_segment(txdes);
+ ftgmac100_txdes_set_txint(txdes);
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ __be16 protocol = skb->protocol;
+
+ if (protocol == cpu_to_be16(ETH_P_IP)) {
+ u8 ip_proto = ip_hdr(skb)->protocol;
+
+ ftgmac100_txdes_set_ipcs(txdes);
+ if (ip_proto == IPPROTO_TCP)
+ ftgmac100_txdes_set_tcpcs(txdes);
+ else if (ip_proto == IPPROTO_UDP)
+ ftgmac100_txdes_set_udpcs(txdes);
+ }
+ }
+
+ spin_lock(&priv->tx_lock);
+ priv->tx_pending++;
+ if (priv->tx_pending == TX_QUEUE_ENTRIES)
+ netif_stop_queue(netdev);
+
+ /* start transmit */
+ ftgmac100_txdes_set_dma_own(txdes);
+ spin_unlock(&priv->tx_lock);
+
+ ftgmac100_txdma_normal_prio_start_polling(priv);
+
+ return NETDEV_TX_OK;
+}
+
+/******************************************************************************
+ * internal functions (buffer)
+ *****************************************************************************/
+static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
+ struct ftgmac100_rxdes *rxdes, gfp_t gfp)
+{
+ struct net_device *netdev = priv->netdev;
+ struct page *page;
+ dma_addr_t map;
+
+ page = alloc_page(gfp);
+ if (!page) {
+ if (net_ratelimit())
+ netdev_err(netdev, "failed to allocate rx page\n");
+ return -ENOMEM;
+ }
+
+ map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(priv->dev, map))) {
+ if (net_ratelimit())
+ netdev_err(netdev, "failed to map rx page\n");
+ __free_page(page);
+ return -ENOMEM;
+ }
+
+ ftgmac100_rxdes_set_page(rxdes, page);
+ ftgmac100_rxdes_set_dma_addr(rxdes, map);
+ ftgmac100_rxdes_set_dma_own(rxdes);
+ return 0;
+}
+
+static void ftgmac100_free_buffers(struct ftgmac100 *priv)
+{
+ int i;
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
+ struct page *page = ftgmac100_rxdes_get_page(rxdes);
+ dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
+
+ if (!page)
+ continue;
+
+ dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
+ __free_page(page);
+ }
+
+ for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+ struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
+ struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
+ dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
+
+ if (!skb)
+ continue;
+
+ dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ }
+
+ dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
+ priv->descs, priv->descs_dma_addr);
+}
+
+static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
+{
+ int i;
+
+ priv->descs = dma_alloc_coherent(priv->dev,
+ sizeof(struct ftgmac100_descs),
+ &priv->descs_dma_addr, GFP_KERNEL);
+ if (!priv->descs)
+ return -ENOMEM;
+
+ memset(priv->descs, 0, sizeof(struct ftgmac100_descs));
+
+ /* initialize RX ring */
+ ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
+
+ if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
+ goto err;
+ }
+
+ /* initialize TX ring */
+ ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
+ return 0;
+
+err:
+ ftgmac100_free_buffers(priv);
+ return -ENOMEM;
+}
+
+/******************************************************************************
+ * internal functions (mdio)
+ *****************************************************************************/
+static void ftgmac100_adjust_link(struct net_device *netdev)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+ struct phy_device *phydev = priv->phydev;
+ int ier;
+
+ if (phydev->speed == priv->old_speed)
+ return;
+
+ priv->old_speed = phydev->speed;
+
+ ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
+
+ /* disable all interrupts */
+ iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
+
+ netif_stop_queue(netdev);
+ ftgmac100_stop_hw(priv);
+
+ netif_start_queue(netdev);
+ ftgmac100_init_hw(priv);
+ ftgmac100_start_hw(priv, phydev->speed);
+
+ /* re-enable interrupts */
+ iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
+}
+
+static int ftgmac100_mii_probe(struct ftgmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ struct phy_device *phydev = NULL;
+ int i;
+
+ /* search for connect PHY device */
+ for (i = 0; i < PHY_MAX_ADDR; i++) {
+ struct phy_device *tmp = priv->mii_bus->phy_map[i];
+
+ if (tmp) {
+ phydev = tmp;
+ break;
+ }
+ }
+
+ /* now we are supposed to have a proper phydev, to attach to... */
+ if (!phydev) {
+ netdev_info(netdev, "%s: no PHY found\n", netdev->name);
+ return -ENODEV;
+ }
+
+ phydev = phy_connect(netdev, dev_name(&phydev->dev),
+ &ftgmac100_adjust_link, 0,
+ PHY_INTERFACE_MODE_GMII);
+
+ if (IS_ERR(phydev)) {
+ netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
+ return PTR_ERR(phydev);
+ }
+
+ priv->phydev = phydev;
+ return 0;
+}
+
+/******************************************************************************
+ * struct mii_bus functions
+ *****************************************************************************/
+static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
+{
+ struct net_device *netdev = bus->priv;
+ struct ftgmac100 *priv = netdev_priv(netdev);
+ unsigned int phycr;
+ int i;
+
+ phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ /* preserve MDC cycle threshold */
+ phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
+
+ phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
+ FTGMAC100_PHYCR_REGAD(regnum) |
+ FTGMAC100_PHYCR_MIIRD;
+
+ iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ for (i = 0; i < 10; i++) {
+ phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
+ int data;
+
+ data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
+ return FTGMAC100_PHYDATA_MIIRDATA(data);
+ }
+
+ udelay(100);
+ }
+
+ netdev_err(netdev, "mdio read timed out\n");
+ return -EIO;
+}
+
+static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
+ int regnum, u16 value)
+{
+ struct net_device *netdev = bus->priv;
+ struct ftgmac100 *priv = netdev_priv(netdev);
+ unsigned int phycr;
+ int data;
+ int i;
+
+ phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ /* preserve MDC cycle threshold */
+ phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
+
+ phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
+ FTGMAC100_PHYCR_REGAD(regnum) |
+ FTGMAC100_PHYCR_MIIWR;
+
+ data = FTGMAC100_PHYDATA_MIIWDATA(value);
+
+ iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
+ iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ for (i = 0; i < 10; i++) {
+ phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
+
+ if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
+ return 0;
+
+ udelay(100);
+ }
+
+ netdev_err(netdev, "mdio write timed out\n");
+ return -EIO;
+}
+
+static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
+{
+ return 0;
+}
+
+/******************************************************************************
+ * struct ethtool_ops functions
+ *****************************************************************************/
+static void ftgmac100_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, dev_name(&netdev->dev));
+}
+
+static int ftgmac100_get_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ return phy_ethtool_gset(priv->phydev, cmd);
+}
+
+static int ftgmac100_set_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ return phy_ethtool_sset(priv->phydev, cmd);
+}
+
+static const struct ethtool_ops ftgmac100_ethtool_ops = {
+ .set_settings = ftgmac100_set_settings,
+ .get_settings = ftgmac100_get_settings,
+ .get_drvinfo = ftgmac100_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+/******************************************************************************
+ * interrupt handler
+ *****************************************************************************/
+static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
+{
+ struct net_device *netdev = dev_id;
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ if (likely(netif_running(netdev))) {
+ /* Disable interrupts for polling */
+ iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
+ napi_schedule(&priv->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/******************************************************************************
+ * struct napi_struct functions
+ *****************************************************************************/
+static int ftgmac100_poll(struct napi_struct *napi, int budget)
+{
+ struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
+ struct net_device *netdev = priv->netdev;
+ unsigned int status;
+ bool completed = true;
+ int rx = 0;
+
+ status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
+ iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
+
+ if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
+ /*
+ * FTGMAC100_INT_RPKT_BUF:
+ * RX DMA has received packets into RX buffer successfully
+ *
+ * FTGMAC100_INT_NO_RXBUF:
+ * RX buffer unavailable
+ */
+ bool retry;
+
+ do {
+ retry = ftgmac100_rx_packet(priv, &rx);
+ } while (retry && rx < budget);
+
+ if (retry && rx == budget)
+ completed = false;
+ }
+
+ if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
+ /*
+ * FTGMAC100_INT_XPKT_ETH:
+ * packet transmitted to ethernet successfully
+ *
+ * FTGMAC100_INT_XPKT_LOST:
+ * packet transmitted to ethernet lost due to late
+ * collision or excessive collision
+ */
+ ftgmac100_tx_complete(priv);
+ }
+
+ if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
+ FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
+ if (net_ratelimit())
+ netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
+ status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
+ status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
+ status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
+ status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
+
+ if (status & FTGMAC100_INT_NO_RXBUF) {
+ /* RX buffer unavailable */
+ netdev->stats.rx_over_errors++;
+ }
+
+ if (status & FTGMAC100_INT_RPKT_LOST) {
+ /* received packet lost due to RX FIFO full */
+ netdev->stats.rx_fifo_errors++;
+ }
+ }
+
+ if (completed) {
+ napi_complete(napi);
+
+ /* enable all interrupts */
+ iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
+ }
+
+ return rx;
+}
+
+/******************************************************************************
+ * struct net_device_ops functions
+ *****************************************************************************/
+static int ftgmac100_open(struct net_device *netdev)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+ int err;
+
+ err = ftgmac100_alloc_buffers(priv);
+ if (err) {
+ netdev_err(netdev, "failed to allocate buffers\n");
+ goto err_alloc;
+ }
+
+ err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
+ if (err) {
+ netdev_err(netdev, "failed to request irq %d\n", priv->irq);
+ goto err_irq;
+ }
+
+ priv->rx_pointer = 0;
+ priv->tx_clean_pointer = 0;
+ priv->tx_pointer = 0;
+ priv->tx_pending = 0;
+
+ err = ftgmac100_reset_hw(priv);
+ if (err)
+ goto err_hw;
+
+ ftgmac100_init_hw(priv);
+ ftgmac100_start_hw(priv, 10);
+
+ phy_start(priv->phydev);
+
+ napi_enable(&priv->napi);
+ netif_start_queue(netdev);
+
+ /* enable all interrupts */
+ iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
+ return 0;
+
+err_hw:
+ free_irq(priv->irq, netdev);
+err_irq:
+ ftgmac100_free_buffers(priv);
+err_alloc:
+ return err;
+}
+
+static int ftgmac100_stop(struct net_device *netdev)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ /* disable all interrupts */
+ iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
+
+ netif_stop_queue(netdev);
+ napi_disable(&priv->napi);
+ phy_stop(priv->phydev);
+
+ ftgmac100_stop_hw(priv);
+ free_irq(priv->irq, netdev);
+ ftgmac100_free_buffers(priv);
+
+ return 0;
+}
+
+static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+ dma_addr_t map;
+
+ if (unlikely(skb->len > MAX_PKT_SIZE)) {
+ if (net_ratelimit())
+ netdev_dbg(netdev, "tx packet too big\n");
+
+ netdev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(priv->dev, map))) {
+ /* drop packet */
+ if (net_ratelimit())
+ netdev_err(netdev, "map socket buffer failed\n");
+
+ netdev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ return ftgmac100_xmit(priv, skb, map);
+}
+
+/* optional */
+static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ struct ftgmac100 *priv = netdev_priv(netdev);
+
+ return phy_mii_ioctl(priv->phydev, ifr, cmd);
+}
+
+static const struct net_device_ops ftgmac100_netdev_ops = {
+ .ndo_open = ftgmac100_open,
+ .ndo_stop = ftgmac100_stop,
+ .ndo_start_xmit = ftgmac100_hard_start_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = ftgmac100_do_ioctl,
+};
+
+/******************************************************************************
+ * struct platform_driver functions
+ *****************************************************************************/
+static int ftgmac100_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int irq;
+ struct net_device *netdev;
+ struct ftgmac100 *priv;
+ int err;
+ int i;
+
+ if (!pdev)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENXIO;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ /* setup net_device */
+ netdev = alloc_etherdev(sizeof(*priv));
+ if (!netdev) {
+ err = -ENOMEM;
+ goto err_alloc_etherdev;
+ }
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+
+ SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
+ netdev->netdev_ops = &ftgmac100_netdev_ops;
+ netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
+
+ platform_set_drvdata(pdev, netdev);
+
+ /* setup private data */
+ priv = netdev_priv(netdev);
+ priv->netdev = netdev;
+ priv->dev = &pdev->dev;
+
+ spin_lock_init(&priv->tx_lock);
+
+ /* initialize NAPI */
+ netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
+
+ /* map io memory */
+ priv->res = request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev));
+ if (!priv->res) {
+ dev_err(&pdev->dev, "Could not reserve memory region\n");
+ err = -ENOMEM;
+ goto err_req_mem;
+ }
+
+ priv->base = ioremap(res->start, resource_size(res));
+ if (!priv->base) {
+ dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
+ err = -EIO;
+ goto err_ioremap;
+ }
+
+ priv->irq = irq;
+
+ /* initialize mdio bus */
+ priv->mii_bus = mdiobus_alloc();
+ if (!priv->mii_bus) {
+ err = -EIO;
+ goto err_alloc_mdiobus;
+ }
+
+ priv->mii_bus->name = "ftgmac100_mdio";
+ snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
+
+ priv->mii_bus->priv = netdev;
+ priv->mii_bus->read = ftgmac100_mdiobus_read;
+ priv->mii_bus->write = ftgmac100_mdiobus_write;
+ priv->mii_bus->reset = ftgmac100_mdiobus_reset;
+ priv->mii_bus->irq = priv->phy_irq;
+
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ priv->mii_bus->irq[i] = PHY_POLL;
+
+ err = mdiobus_register(priv->mii_bus);
+ if (err) {
+ dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
+ goto err_register_mdiobus;
+ }
+
+ err = ftgmac100_mii_probe(priv);
+ if (err) {
+ dev_err(&pdev->dev, "MII Probe failed!\n");
+ goto err_mii_probe;
+ }
+
+ /* register network device */
+ err = register_netdev(netdev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register netdev\n");
+ goto err_register_netdev;
+ }
+
+ netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
+
+ if (!is_valid_ether_addr(netdev->dev_addr)) {
+ random_ether_addr(netdev->dev_addr);
+ netdev_info(netdev, "generated random MAC address %pM\n",
+ netdev->dev_addr);
+ }
+
+ return 0;
+
+err_register_netdev:
+ phy_disconnect(priv->phydev);
+err_mii_probe:
+ mdiobus_unregister(priv->mii_bus);
+err_register_mdiobus:
+ mdiobus_free(priv->mii_bus);
+err_alloc_mdiobus:
+ iounmap(priv->base);
+err_ioremap:
+ release_resource(priv->res);
+err_req_mem:
+ netif_napi_del(&priv->napi);
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(netdev);
+err_alloc_etherdev:
+ return err;
+}
+
+static int __exit ftgmac100_remove(struct platform_device *pdev)
+{
+ struct net_device *netdev;
+ struct ftgmac100 *priv;
+
+ netdev = platform_get_drvdata(pdev);
+ priv = netdev_priv(netdev);
+
+ unregister_netdev(netdev);
+
+ phy_disconnect(priv->phydev);
+ mdiobus_unregister(priv->mii_bus);
+ mdiobus_free(priv->mii_bus);
+
+ iounmap(priv->base);
+ release_resource(priv->res);
+
+ netif_napi_del(&priv->napi);
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(netdev);
+ return 0;
+}
+
+static struct platform_driver ftgmac100_driver = {
+ .probe = ftgmac100_probe,
+ .remove = __exit_p(ftgmac100_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+/******************************************************************************
+ * initialization / finalization
+ *****************************************************************************/
+static int __init ftgmac100_init(void)
+{
+ pr_info("Loading version " DRV_VERSION " ...\n");
+ return platform_driver_register(&ftgmac100_driver);
+}
+
+static void __exit ftgmac100_exit(void)
+{
+ platform_driver_unregister(&ftgmac100_driver);
+}
+
+module_init(ftgmac100_init);
+module_exit(ftgmac100_exit);
+
+MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
+MODULE_DESCRIPTION("FTGMAC100 driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Faraday FTGMAC100 Gigabit Ethernet
+ *
+ * (C) Copyright 2009-2011 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __FTGMAC100_H
+#define __FTGMAC100_H
+
+#define FTGMAC100_OFFSET_ISR 0x00
+#define FTGMAC100_OFFSET_IER 0x04
+#define FTGMAC100_OFFSET_MAC_MADR 0x08
+#define FTGMAC100_OFFSET_MAC_LADR 0x0c
+#define FTGMAC100_OFFSET_MAHT0 0x10
+#define FTGMAC100_OFFSET_MAHT1 0x14
+#define FTGMAC100_OFFSET_NPTXPD 0x18
+#define FTGMAC100_OFFSET_RXPD 0x1c
+#define FTGMAC100_OFFSET_NPTXR_BADR 0x20
+#define FTGMAC100_OFFSET_RXR_BADR 0x24
+#define FTGMAC100_OFFSET_HPTXPD 0x28
+#define FTGMAC100_OFFSET_HPTXR_BADR 0x2c
+#define FTGMAC100_OFFSET_ITC 0x30
+#define FTGMAC100_OFFSET_APTC 0x34
+#define FTGMAC100_OFFSET_DBLAC 0x38
+#define FTGMAC100_OFFSET_DMAFIFOS 0x3c
+#define FTGMAC100_OFFSET_REVR 0x40
+#define FTGMAC100_OFFSET_FEAR 0x44
+#define FTGMAC100_OFFSET_TPAFCR 0x48
+#define FTGMAC100_OFFSET_RBSR 0x4c
+#define FTGMAC100_OFFSET_MACCR 0x50
+#define FTGMAC100_OFFSET_MACSR 0x54
+#define FTGMAC100_OFFSET_TM 0x58
+#define FTGMAC100_OFFSET_PHYCR 0x60
+#define FTGMAC100_OFFSET_PHYDATA 0x64
+#define FTGMAC100_OFFSET_FCR 0x68
+#define FTGMAC100_OFFSET_BPR 0x6c
+#define FTGMAC100_OFFSET_WOLCR 0x70
+#define FTGMAC100_OFFSET_WOLSR 0x74
+#define FTGMAC100_OFFSET_WFCRC 0x78
+#define FTGMAC100_OFFSET_WFBM1 0x80
+#define FTGMAC100_OFFSET_WFBM2 0x84
+#define FTGMAC100_OFFSET_WFBM3 0x88
+#define FTGMAC100_OFFSET_WFBM4 0x8c
+#define FTGMAC100_OFFSET_NPTXR_PTR 0x90
+#define FTGMAC100_OFFSET_HPTXR_PTR 0x94
+#define FTGMAC100_OFFSET_RXR_PTR 0x98
+#define FTGMAC100_OFFSET_TX 0xa0
+#define FTGMAC100_OFFSET_TX_MCOL_SCOL 0xa4
+#define FTGMAC100_OFFSET_TX_ECOL_FAIL 0xa8
+#define FTGMAC100_OFFSET_TX_LCOL_UND 0xac
+#define FTGMAC100_OFFSET_RX 0xb0
+#define FTGMAC100_OFFSET_RX_BC 0xb4
+#define FTGMAC100_OFFSET_RX_MC 0xb8
+#define FTGMAC100_OFFSET_RX_PF_AEP 0xbc
+#define FTGMAC100_OFFSET_RX_RUNT 0xc0
+#define FTGMAC100_OFFSET_RX_CRCER_FTL 0xc4
+#define FTGMAC100_OFFSET_RX_COL_LOST 0xc8
+
+/*
+ * Interrupt status register & interrupt enable register
+ */
+#define FTGMAC100_INT_RPKT_BUF (1 << 0)
+#define FTGMAC100_INT_RPKT_FIFO (1 << 1)
+#define FTGMAC100_INT_NO_RXBUF (1 << 2)
+#define FTGMAC100_INT_RPKT_LOST (1 << 3)
+#define FTGMAC100_INT_XPKT_ETH (1 << 4)
+#define FTGMAC100_INT_XPKT_FIFO (1 << 5)
+#define FTGMAC100_INT_NO_NPTXBUF (1 << 6)
+#define FTGMAC100_INT_XPKT_LOST (1 << 7)
+#define FTGMAC100_INT_AHB_ERR (1 << 8)
+#define FTGMAC100_INT_PHYSTS_CHG (1 << 9)
+#define FTGMAC100_INT_NO_HPTXBUF (1 << 10)
+
+/*
+ * Interrupt timer control register
+ */
+#define FTGMAC100_ITC_RXINT_CNT(x) (((x) & 0xf) << 0)
+#define FTGMAC100_ITC_RXINT_THR(x) (((x) & 0x7) << 4)
+#define FTGMAC100_ITC_RXINT_TIME_SEL (1 << 7)
+#define FTGMAC100_ITC_TXINT_CNT(x) (((x) & 0xf) << 8)
+#define FTGMAC100_ITC_TXINT_THR(x) (((x) & 0x7) << 12)
+#define FTGMAC100_ITC_TXINT_TIME_SEL (1 << 15)
+
+/*
+ * Automatic polling timer control register
+ */
+#define FTGMAC100_APTC_RXPOLL_CNT(x) (((x) & 0xf) << 0)
+#define FTGMAC100_APTC_RXPOLL_TIME_SEL (1 << 4)
+#define FTGMAC100_APTC_TXPOLL_CNT(x) (((x) & 0xf) << 8)
+#define FTGMAC100_APTC_TXPOLL_TIME_SEL (1 << 12)
+
+/*
+ * DMA burst length and arbitration control register
+ */
+#define FTGMAC100_DBLAC_RXFIFO_LTHR(x) (((x) & 0x7) << 0)
+#define FTGMAC100_DBLAC_RXFIFO_HTHR(x) (((x) & 0x7) << 3)
+#define FTGMAC100_DBLAC_RX_THR_EN (1 << 6)
+#define FTGMAC100_DBLAC_RXBURST_SIZE(x) (((x) & 0x3) << 8)
+#define FTGMAC100_DBLAC_TXBURST_SIZE(x) (((x) & 0x3) << 10)
+#define FTGMAC100_DBLAC_RXDES_SIZE(x) (((x) & 0xf) << 12)
+#define FTGMAC100_DBLAC_TXDES_SIZE(x) (((x) & 0xf) << 16)
+#define FTGMAC100_DBLAC_IFG_CNT(x) (((x) & 0x7) << 20)
+#define FTGMAC100_DBLAC_IFG_INC (1 << 23)
+
+/*
+ * DMA FIFO status register
+ */
+#define FTGMAC100_DMAFIFOS_RXDMA1_SM(dmafifos) ((dmafifos) & 0xf)
+#define FTGMAC100_DMAFIFOS_RXDMA2_SM(dmafifos) (((dmafifos) >> 4) & 0xf)
+#define FTGMAC100_DMAFIFOS_RXDMA3_SM(dmafifos) (((dmafifos) >> 8) & 0x7)
+#define FTGMAC100_DMAFIFOS_TXDMA1_SM(dmafifos) (((dmafifos) >> 12) & 0xf)
+#define FTGMAC100_DMAFIFOS_TXDMA2_SM(dmafifos) (((dmafifos) >> 16) & 0x3)
+#define FTGMAC100_DMAFIFOS_TXDMA3_SM(dmafifos) (((dmafifos) >> 18) & 0xf)
+#define FTGMAC100_DMAFIFOS_RXFIFO_EMPTY (1 << 26)
+#define FTGMAC100_DMAFIFOS_TXFIFO_EMPTY (1 << 27)
+#define FTGMAC100_DMAFIFOS_RXDMA_GRANT (1 << 28)
+#define FTGMAC100_DMAFIFOS_TXDMA_GRANT (1 << 29)
+#define FTGMAC100_DMAFIFOS_RXDMA_REQ (1 << 30)
+#define FTGMAC100_DMAFIFOS_TXDMA_REQ (1 << 31)
+
+/*
+ * Receive buffer size register
+ */
+#define FTGMAC100_RBSR_SIZE(x) ((x) & 0x3fff)
+
+/*
+ * MAC control register
+ */
+#define FTGMAC100_MACCR_TXDMA_EN (1 << 0)
+#define FTGMAC100_MACCR_RXDMA_EN (1 << 1)
+#define FTGMAC100_MACCR_TXMAC_EN (1 << 2)
+#define FTGMAC100_MACCR_RXMAC_EN (1 << 3)
+#define FTGMAC100_MACCR_RM_VLAN (1 << 4)
+#define FTGMAC100_MACCR_HPTXR_EN (1 << 5)
+#define FTGMAC100_MACCR_LOOP_EN (1 << 6)
+#define FTGMAC100_MACCR_ENRX_IN_HALFTX (1 << 7)
+#define FTGMAC100_MACCR_FULLDUP (1 << 8)
+#define FTGMAC100_MACCR_GIGA_MODE (1 << 9)
+#define FTGMAC100_MACCR_CRC_APD (1 << 10)
+#define FTGMAC100_MACCR_RX_RUNT (1 << 12)
+#define FTGMAC100_MACCR_JUMBO_LF (1 << 13)
+#define FTGMAC100_MACCR_RX_ALL (1 << 14)
+#define FTGMAC100_MACCR_HT_MULTI_EN (1 << 15)
+#define FTGMAC100_MACCR_RX_MULTIPKT (1 << 16)
+#define FTGMAC100_MACCR_RX_BROADPKT (1 << 17)
+#define FTGMAC100_MACCR_DISCARD_CRCERR (1 << 18)
+#define FTGMAC100_MACCR_FAST_MODE (1 << 19)
+#define FTGMAC100_MACCR_SW_RST (1 << 31)
+
+/*
+ * PHY control register
+ */
+#define FTGMAC100_PHYCR_MDC_CYCTHR_MASK 0x3f
+#define FTGMAC100_PHYCR_MDC_CYCTHR(x) ((x) & 0x3f)
+#define FTGMAC100_PHYCR_PHYAD(x) (((x) & 0x1f) << 16)
+#define FTGMAC100_PHYCR_REGAD(x) (((x) & 0x1f) << 21)
+#define FTGMAC100_PHYCR_MIIRD (1 << 26)
+#define FTGMAC100_PHYCR_MIIWR (1 << 27)
+
+/*
+ * PHY data register
+ */
+#define FTGMAC100_PHYDATA_MIIWDATA(x) ((x) & 0xffff)
+#define FTGMAC100_PHYDATA_MIIRDATA(phydata) (((phydata) >> 16) & 0xffff)
+
+/*
+ * Transmit descriptor, aligned to 16 bytes
+ */
+struct ftgmac100_txdes {
+ unsigned int txdes0;
+ unsigned int txdes1;
+ unsigned int txdes2; /* not used by HW */
+ unsigned int txdes3; /* TXBUF_BADR */
+} __attribute__ ((aligned(16)));
+
+#define FTGMAC100_TXDES0_TXBUF_SIZE(x) ((x) & 0x3fff)
+#define FTGMAC100_TXDES0_EDOTR (1 << 15)
+#define FTGMAC100_TXDES0_CRC_ERR (1 << 19)
+#define FTGMAC100_TXDES0_LTS (1 << 28)
+#define FTGMAC100_TXDES0_FTS (1 << 29)
+#define FTGMAC100_TXDES0_TXDMA_OWN (1 << 31)
+
+#define FTGMAC100_TXDES1_VLANTAG_CI(x) ((x) & 0xffff)
+#define FTGMAC100_TXDES1_INS_VLANTAG (1 << 16)
+#define FTGMAC100_TXDES1_TCP_CHKSUM (1 << 17)
+#define FTGMAC100_TXDES1_UDP_CHKSUM (1 << 18)
+#define FTGMAC100_TXDES1_IP_CHKSUM (1 << 19)
+#define FTGMAC100_TXDES1_LLC (1 << 22)
+#define FTGMAC100_TXDES1_TX2FIC (1 << 30)
+#define FTGMAC100_TXDES1_TXIC (1 << 31)
+
+/*
+ * Receive descriptor, aligned to 16 bytes
+ */
+struct ftgmac100_rxdes {
+ unsigned int rxdes0;
+ unsigned int rxdes1;
+ unsigned int rxdes2; /* not used by HW */
+ unsigned int rxdes3; /* RXBUF_BADR */
+} __attribute__ ((aligned(16)));
+
+#define FTGMAC100_RXDES0_VDBC 0x3fff
+#define FTGMAC100_RXDES0_EDORR (1 << 15)
+#define FTGMAC100_RXDES0_MULTICAST (1 << 16)
+#define FTGMAC100_RXDES0_BROADCAST (1 << 17)
+#define FTGMAC100_RXDES0_RX_ERR (1 << 18)
+#define FTGMAC100_RXDES0_CRC_ERR (1 << 19)
+#define FTGMAC100_RXDES0_FTL (1 << 20)
+#define FTGMAC100_RXDES0_RUNT (1 << 21)
+#define FTGMAC100_RXDES0_RX_ODD_NB (1 << 22)
+#define FTGMAC100_RXDES0_FIFO_FULL (1 << 23)
+#define FTGMAC100_RXDES0_PAUSE_OPCODE (1 << 24)
+#define FTGMAC100_RXDES0_PAUSE_FRAME (1 << 25)
+#define FTGMAC100_RXDES0_LRS (1 << 28)
+#define FTGMAC100_RXDES0_FRS (1 << 29)
+#define FTGMAC100_RXDES0_RXPKT_RDY (1 << 31)
+
+#define FTGMAC100_RXDES1_VLANTAG_CI 0xffff
+#define FTGMAC100_RXDES1_PROT_MASK (0x3 << 20)
+#define FTGMAC100_RXDES1_PROT_NONIP (0x0 << 20)
+#define FTGMAC100_RXDES1_PROT_IP (0x1 << 20)
+#define FTGMAC100_RXDES1_PROT_TCPIP (0x2 << 20)
+#define FTGMAC100_RXDES1_PROT_UDPIP (0x3 << 20)
+#define FTGMAC100_RXDES1_LLC (1 << 22)
+#define FTGMAC100_RXDES1_DF (1 << 23)
+#define FTGMAC100_RXDES1_VLANTAG_AVAIL (1 << 24)
+#define FTGMAC100_RXDES1_TCP_CHKSUM_ERR (1 << 25)
+#define FTGMAC100_RXDES1_UDP_CHKSUM_ERR (1 << 26)
+#define FTGMAC100_RXDES1_IP_CHKSUM_ERR (1 << 27)
+
+#endif /* __FTGMAC100_H */
--- /dev/null
+/*
+ * Faraday FTMAC100 10/100 Ethernet
+ *
+ * (C) Copyright 2009-2011 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+
+#include "ftmac100.h"
+
+#define DRV_NAME "ftmac100"
+#define DRV_VERSION "0.2"
+
+#define RX_QUEUE_ENTRIES 128 /* must be power of 2 */
+#define TX_QUEUE_ENTRIES 16 /* must be power of 2 */
+
+#define MAX_PKT_SIZE 1518
+#define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */
+
+#if MAX_PKT_SIZE > 0x7ff
+#error invalid MAX_PKT_SIZE
+#endif
+
+#if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE
+#error invalid RX_BUF_SIZE
+#endif
+
+/******************************************************************************
+ * private data
+ *****************************************************************************/
+struct ftmac100_descs {
+ struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
+ struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES];
+};
+
+struct ftmac100 {
+ struct resource *res;
+ void __iomem *base;
+ int irq;
+
+ struct ftmac100_descs *descs;
+ dma_addr_t descs_dma_addr;
+
+ unsigned int rx_pointer;
+ unsigned int tx_clean_pointer;
+ unsigned int tx_pointer;
+ unsigned int tx_pending;
+
+ spinlock_t tx_lock;
+
+ struct net_device *netdev;
+ struct device *dev;
+ struct napi_struct napi;
+
+ struct mii_if_info mii;
+};
+
+static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
+ struct ftmac100_rxdes *rxdes, gfp_t gfp);
+
+/******************************************************************************
+ * internal functions (hardware register access)
+ *****************************************************************************/
+#define INT_MASK_ALL_ENABLED (FTMAC100_INT_RPKT_FINISH | \
+ FTMAC100_INT_NORXBUF | \
+ FTMAC100_INT_XPKT_OK | \
+ FTMAC100_INT_XPKT_LOST | \
+ FTMAC100_INT_RPKT_LOST | \
+ FTMAC100_INT_AHB_ERR | \
+ FTMAC100_INT_PHYSTS_CHG)
+
+#define INT_MASK_ALL_DISABLED 0
+
+static void ftmac100_enable_all_int(struct ftmac100 *priv)
+{
+ iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR);
+}
+
+static void ftmac100_disable_all_int(struct ftmac100 *priv)
+{
+ iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR);
+}
+
+static void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
+{
+ iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR);
+}
+
+static void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
+{
+ iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR);
+}
+
+static void ftmac100_txdma_start_polling(struct ftmac100 *priv)
+{
+ iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD);
+}
+
+static int ftmac100_reset(struct ftmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ int i;
+
+ /* NOTE: reset clears all registers */
+ iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR);
+
+ for (i = 0; i < 5; i++) {
+ unsigned int maccr;
+
+ maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR);
+ if (!(maccr & FTMAC100_MACCR_SW_RST)) {
+ /*
+ * FTMAC100_MACCR_SW_RST cleared does not indicate
+ * that hardware reset completed (what the f*ck).
+ * We still need to wait for a while.
+ */
+ udelay(500);
+ return 0;
+ }
+
+ udelay(1000);
+ }
+
+ netdev_err(netdev, "software reset failed\n");
+ return -EIO;
+}
+
+static void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac)
+{
+ unsigned int maddr = mac[0] << 8 | mac[1];
+ unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
+
+ iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR);
+ iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR);
+}
+
+#define MACCR_ENABLE_ALL (FTMAC100_MACCR_XMT_EN | \
+ FTMAC100_MACCR_RCV_EN | \
+ FTMAC100_MACCR_XDMA_EN | \
+ FTMAC100_MACCR_RDMA_EN | \
+ FTMAC100_MACCR_CRC_APD | \
+ FTMAC100_MACCR_FULLDUP | \
+ FTMAC100_MACCR_RX_RUNT | \
+ FTMAC100_MACCR_RX_BROADPKT)
+
+static int ftmac100_start_hw(struct ftmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+
+ if (ftmac100_reset(priv))
+ return -EIO;
+
+ /* setup ring buffer base registers */
+ ftmac100_set_rx_ring_base(priv,
+ priv->descs_dma_addr +
+ offsetof(struct ftmac100_descs, rxdes));
+ ftmac100_set_tx_ring_base(priv,
+ priv->descs_dma_addr +
+ offsetof(struct ftmac100_descs, txdes));
+
+ iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC);
+
+ ftmac100_set_mac(priv, netdev->dev_addr);
+
+ iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR);
+ return 0;
+}
+
+static void ftmac100_stop_hw(struct ftmac100 *priv)
+{
+ iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR);
+}
+
+/******************************************************************************
+ * internal functions (receive descriptor)
+ *****************************************************************************/
+static bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS);
+}
+
+static bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS);
+}
+
+static bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
+}
+
+static void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes)
+{
+ /* clear status bits */
+ rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
+}
+
+static bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR);
+}
+
+static bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR);
+}
+
+static bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL);
+}
+
+static bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT);
+}
+
+static bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB);
+}
+
+static unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes)
+{
+ return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL;
+}
+
+static bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes)
+{
+ return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST);
+}
+
+static void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes,
+ unsigned int size)
+{
+ rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR);
+ rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size));
+}
+
+static void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes)
+{
+ rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR);
+}
+
+static void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes,
+ dma_addr_t addr)
+{
+ rxdes->rxdes2 = cpu_to_le32(addr);
+}
+
+static dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes)
+{
+ return le32_to_cpu(rxdes->rxdes2);
+}
+
+/*
+ * rxdes3 is not used by hardware. We use it to keep track of page.
+ * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
+ */
+static void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page)
+{
+ rxdes->rxdes3 = (unsigned int)page;
+}
+
+static struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes)
+{
+ return (struct page *)rxdes->rxdes3;
+}
+
+/******************************************************************************
+ * internal functions (receive)
+ *****************************************************************************/
+static int ftmac100_next_rx_pointer(int pointer)
+{
+ return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
+}
+
+static void ftmac100_rx_pointer_advance(struct ftmac100 *priv)
+{
+ priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer);
+}
+
+static struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv)
+{
+ return &priv->descs->rxdes[priv->rx_pointer];
+}
+
+static struct ftmac100_rxdes *
+ftmac100_rx_locate_first_segment(struct ftmac100 *priv)
+{
+ struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
+
+ while (!ftmac100_rxdes_owned_by_dma(rxdes)) {
+ if (ftmac100_rxdes_first_segment(rxdes))
+ return rxdes;
+
+ ftmac100_rxdes_set_dma_own(rxdes);
+ ftmac100_rx_pointer_advance(priv);
+ rxdes = ftmac100_current_rxdes(priv);
+ }
+
+ return NULL;
+}
+
+static bool ftmac100_rx_packet_error(struct ftmac100 *priv,
+ struct ftmac100_rxdes *rxdes)
+{
+ struct net_device *netdev = priv->netdev;
+ bool error = false;
+
+ if (unlikely(ftmac100_rxdes_rx_error(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx err\n");
+
+ netdev->stats.rx_errors++;
+ error = true;
+ }
+
+ if (unlikely(ftmac100_rxdes_crc_error(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx crc err\n");
+
+ netdev->stats.rx_crc_errors++;
+ error = true;
+ }
+
+ if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx frame too long\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ } else if (unlikely(ftmac100_rxdes_runt(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx runt\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ } else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) {
+ if (net_ratelimit())
+ netdev_info(netdev, "rx odd nibble\n");
+
+ netdev->stats.rx_length_errors++;
+ error = true;
+ }
+
+ return error;
+}
+
+static void ftmac100_rx_drop_packet(struct ftmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
+ bool done = false;
+
+ if (net_ratelimit())
+ netdev_dbg(netdev, "drop packet %p\n", rxdes);
+
+ do {
+ if (ftmac100_rxdes_last_segment(rxdes))
+ done = true;
+
+ ftmac100_rxdes_set_dma_own(rxdes);
+ ftmac100_rx_pointer_advance(priv);
+ rxdes = ftmac100_current_rxdes(priv);
+ } while (!done && !ftmac100_rxdes_owned_by_dma(rxdes));
+
+ netdev->stats.rx_dropped++;
+}
+
+static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftmac100_rxdes *rxdes;
+ struct sk_buff *skb;
+ struct page *page;
+ dma_addr_t map;
+ int length;
+
+ rxdes = ftmac100_rx_locate_first_segment(priv);
+ if (!rxdes)
+ return false;
+
+ if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) {
+ ftmac100_rx_drop_packet(priv);
+ return true;
+ }
+
+ /*
+ * It is impossible to get multi-segment packets
+ * because we always provide big enough receive buffers.
+ */
+ if (unlikely(!ftmac100_rxdes_last_segment(rxdes)))
+ BUG();
+
+ /* start processing */
+ skb = netdev_alloc_skb_ip_align(netdev, 128);
+ if (unlikely(!skb)) {
+ if (net_ratelimit())
+ netdev_err(netdev, "rx skb alloc failed\n");
+
+ ftmac100_rx_drop_packet(priv);
+ return true;
+ }
+
+ if (unlikely(ftmac100_rxdes_multicast(rxdes)))
+ netdev->stats.multicast++;
+
+ map = ftmac100_rxdes_get_dma_addr(rxdes);
+ dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
+
+ length = ftmac100_rxdes_frame_length(rxdes);
+ page = ftmac100_rxdes_get_page(rxdes);
+ skb_fill_page_desc(skb, 0, page, 0, length);
+ skb->len += length;
+ skb->data_len += length;
+ skb->truesize += length;
+ __pskb_pull_tail(skb, min(length, 64));
+
+ ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
+
+ ftmac100_rx_pointer_advance(priv);
+
+ skb->protocol = eth_type_trans(skb, netdev);
+
+ netdev->stats.rx_packets++;
+ netdev->stats.rx_bytes += skb->len;
+
+ /* push packet to protocol stack */
+ netif_receive_skb(skb);
+
+ (*processed)++;
+ return true;
+}
+
+/******************************************************************************
+ * internal functions (transmit descriptor)
+ *****************************************************************************/
+static void ftmac100_txdes_reset(struct ftmac100_txdes *txdes)
+{
+ /* clear all except end of ring bit */
+ txdes->txdes0 = 0;
+ txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
+ txdes->txdes2 = 0;
+ txdes->txdes3 = 0;
+}
+
+static bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes)
+{
+ return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
+}
+
+static void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes)
+{
+ /*
+ * Make sure dma own bit will not be set before any other
+ * descriptor fields.
+ */
+ wmb();
+ txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
+}
+
+static bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes)
+{
+ return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL);
+}
+
+static bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes)
+{
+ return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL);
+}
+
+static void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
+}
+
+static void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS);
+}
+
+static void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS);
+}
+
+static void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes)
+{
+ txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC);
+}
+
+static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes,
+ unsigned int len)
+{
+ txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len));
+}
+
+static void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes,
+ dma_addr_t addr)
+{
+ txdes->txdes2 = cpu_to_le32(addr);
+}
+
+static dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes)
+{
+ return le32_to_cpu(txdes->txdes2);
+}
+
+/*
+ * txdes3 is not used by hardware. We use it to keep track of socket buffer.
+ * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
+ */
+static void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb)
+{
+ txdes->txdes3 = (unsigned int)skb;
+}
+
+static struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes)
+{
+ return (struct sk_buff *)txdes->txdes3;
+}
+
+/******************************************************************************
+ * internal functions (transmit)
+ *****************************************************************************/
+static int ftmac100_next_tx_pointer(int pointer)
+{
+ return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
+}
+
+static void ftmac100_tx_pointer_advance(struct ftmac100 *priv)
+{
+ priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer);
+}
+
+static void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv)
+{
+ priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer);
+}
+
+static struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv)
+{
+ return &priv->descs->txdes[priv->tx_pointer];
+}
+
+static struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv)
+{
+ return &priv->descs->txdes[priv->tx_clean_pointer];
+}
+
+static bool ftmac100_tx_complete_packet(struct ftmac100 *priv)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftmac100_txdes *txdes;
+ struct sk_buff *skb;
+ dma_addr_t map;
+
+ if (priv->tx_pending == 0)
+ return false;
+
+ txdes = ftmac100_current_clean_txdes(priv);
+
+ if (ftmac100_txdes_owned_by_dma(txdes))
+ return false;
+
+ skb = ftmac100_txdes_get_skb(txdes);
+ map = ftmac100_txdes_get_dma_addr(txdes);
+
+ if (unlikely(ftmac100_txdes_excessive_collision(txdes) ||
+ ftmac100_txdes_late_collision(txdes))) {
+ /*
+ * packet transmitted to ethernet lost due to late collision
+ * or excessive collision
+ */
+ netdev->stats.tx_aborted_errors++;
+ } else {
+ netdev->stats.tx_packets++;
+ netdev->stats.tx_bytes += skb->len;
+ }
+
+ dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+
+ ftmac100_txdes_reset(txdes);
+
+ ftmac100_tx_clean_pointer_advance(priv);
+
+ spin_lock(&priv->tx_lock);
+ priv->tx_pending--;
+ spin_unlock(&priv->tx_lock);
+ netif_wake_queue(netdev);
+
+ return true;
+}
+
+static void ftmac100_tx_complete(struct ftmac100 *priv)
+{
+ while (ftmac100_tx_complete_packet(priv))
+ ;
+}
+
+static int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb,
+ dma_addr_t map)
+{
+ struct net_device *netdev = priv->netdev;
+ struct ftmac100_txdes *txdes;
+ unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
+
+ txdes = ftmac100_current_txdes(priv);
+ ftmac100_tx_pointer_advance(priv);
+
+ /* setup TX descriptor */
+ ftmac100_txdes_set_skb(txdes, skb);
+ ftmac100_txdes_set_dma_addr(txdes, map);
+
+ ftmac100_txdes_set_first_segment(txdes);
+ ftmac100_txdes_set_last_segment(txdes);
+ ftmac100_txdes_set_txint(txdes);
+ ftmac100_txdes_set_buffer_size(txdes, len);
+
+ spin_lock(&priv->tx_lock);
+ priv->tx_pending++;
+ if (priv->tx_pending == TX_QUEUE_ENTRIES)
+ netif_stop_queue(netdev);
+
+ /* start transmit */
+ ftmac100_txdes_set_dma_own(txdes);
+ spin_unlock(&priv->tx_lock);
+
+ ftmac100_txdma_start_polling(priv);
+ return NETDEV_TX_OK;
+}
+
+/******************************************************************************
+ * internal functions (buffer)
+ *****************************************************************************/
+static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
+ struct ftmac100_rxdes *rxdes, gfp_t gfp)
+{
+ struct net_device *netdev = priv->netdev;
+ struct page *page;
+ dma_addr_t map;
+
+ page = alloc_page(gfp);
+ if (!page) {
+ if (net_ratelimit())
+ netdev_err(netdev, "failed to allocate rx page\n");
+ return -ENOMEM;
+ }
+
+ map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
+ if (unlikely(dma_mapping_error(priv->dev, map))) {
+ if (net_ratelimit())
+ netdev_err(netdev, "failed to map rx page\n");
+ __free_page(page);
+ return -ENOMEM;
+ }
+
+ ftmac100_rxdes_set_page(rxdes, page);
+ ftmac100_rxdes_set_dma_addr(rxdes, map);
+ ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE);
+ ftmac100_rxdes_set_dma_own(rxdes);
+ return 0;
+}
+
+static void ftmac100_free_buffers(struct ftmac100 *priv)
+{
+ int i;
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
+ struct page *page = ftmac100_rxdes_get_page(rxdes);
+ dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes);
+
+ if (!page)
+ continue;
+
+ dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
+ __free_page(page);
+ }
+
+ for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+ struct ftmac100_txdes *txdes = &priv->descs->txdes[i];
+ struct sk_buff *skb = ftmac100_txdes_get_skb(txdes);
+ dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes);
+
+ if (!skb)
+ continue;
+
+ dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+ }
+
+ dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs),
+ priv->descs, priv->descs_dma_addr);
+}
+
+static int ftmac100_alloc_buffers(struct ftmac100 *priv)
+{
+ int i;
+
+ priv->descs = dma_alloc_coherent(priv->dev, sizeof(struct ftmac100_descs),
+ &priv->descs_dma_addr, GFP_KERNEL);
+ if (!priv->descs)
+ return -ENOMEM;
+
+ memset(priv->descs, 0, sizeof(struct ftmac100_descs));
+
+ /* initialize RX ring */
+ ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
+
+ if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
+ goto err;
+ }
+
+ /* initialize TX ring */
+ ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
+ return 0;
+
+err:
+ ftmac100_free_buffers(priv);
+ return -ENOMEM;
+}
+
+/******************************************************************************
+ * struct mii_if_info functions
+ *****************************************************************************/
+static int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ unsigned int phycr;
+ int i;
+
+ phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
+ FTMAC100_PHYCR_REGAD(reg) |
+ FTMAC100_PHYCR_MIIRD;
+
+ iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
+
+ for (i = 0; i < 10; i++) {
+ phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
+
+ if ((phycr & FTMAC100_PHYCR_MIIRD) == 0)
+ return phycr & FTMAC100_PHYCR_MIIRDATA;
+
+ udelay(100);
+ }
+
+ netdev_err(netdev, "mdio read timed out\n");
+ return 0;
+}
+
+static void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg,
+ int data)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ unsigned int phycr;
+ int i;
+
+ phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
+ FTMAC100_PHYCR_REGAD(reg) |
+ FTMAC100_PHYCR_MIIWR;
+
+ data = FTMAC100_PHYWDATA_MIIWDATA(data);
+
+ iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA);
+ iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
+
+ for (i = 0; i < 10; i++) {
+ phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
+
+ if ((phycr & FTMAC100_PHYCR_MIIWR) == 0)
+ return;
+
+ udelay(100);
+ }
+
+ netdev_err(netdev, "mdio write timed out\n");
+}
+
+/******************************************************************************
+ * struct ethtool_ops functions
+ *****************************************************************************/
+static void ftmac100_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_NAME);
+ strcpy(info->version, DRV_VERSION);
+ strcpy(info->bus_info, dev_name(&netdev->dev));
+}
+
+static int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ return mii_ethtool_gset(&priv->mii, cmd);
+}
+
+static int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ return mii_ethtool_sset(&priv->mii, cmd);
+}
+
+static int ftmac100_nway_reset(struct net_device *netdev)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ return mii_nway_restart(&priv->mii);
+}
+
+static u32 ftmac100_get_link(struct net_device *netdev)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ return mii_link_ok(&priv->mii);
+}
+
+static const struct ethtool_ops ftmac100_ethtool_ops = {
+ .set_settings = ftmac100_set_settings,
+ .get_settings = ftmac100_get_settings,
+ .get_drvinfo = ftmac100_get_drvinfo,
+ .nway_reset = ftmac100_nway_reset,
+ .get_link = ftmac100_get_link,
+};
+
+/******************************************************************************
+ * interrupt handler
+ *****************************************************************************/
+static irqreturn_t ftmac100_interrupt(int irq, void *dev_id)
+{
+ struct net_device *netdev = dev_id;
+ struct ftmac100 *priv = netdev_priv(netdev);
+
+ if (likely(netif_running(netdev))) {
+ /* Disable interrupts for polling */
+ ftmac100_disable_all_int(priv);
+ napi_schedule(&priv->napi);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/******************************************************************************
+ * struct napi_struct functions
+ *****************************************************************************/
+static int ftmac100_poll(struct napi_struct *napi, int budget)
+{
+ struct ftmac100 *priv = container_of(napi, struct ftmac100, napi);
+ struct net_device *netdev = priv->netdev;
+ unsigned int status;
+ bool completed = true;
+ int rx = 0;
+
+ status = ioread32(priv->base + FTMAC100_OFFSET_ISR);
+
+ if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) {
+ /*
+ * FTMAC100_INT_RPKT_FINISH:
+ * RX DMA has received packets into RX buffer successfully
+ *
+ * FTMAC100_INT_NORXBUF:
+ * RX buffer unavailable
+ */
+ bool retry;
+
+ do {
+ retry = ftmac100_rx_packet(priv, &rx);
+ } while (retry && rx < budget);
+
+ if (retry && rx == budget)
+ completed = false;
+ }
+
+ if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) {
+ /*
+ * FTMAC100_INT_XPKT_OK:
+ * packet transmitted to ethernet successfully
+ *
+ * FTMAC100_INT_XPKT_LOST:
+ * packet transmitted to ethernet lost due to late
+ * collision or excessive collision
+ */
+ ftmac100_tx_complete(priv);
+ }
+
+ if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST |
+ FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) {
+ if (net_ratelimit())
+ netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
+ status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "",
+ status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
+ status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
+ status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
+
+ if (status & FTMAC100_INT_NORXBUF) {
+ /* RX buffer unavailable */
+ netdev->stats.rx_over_errors++;
+ }
+
+ if (status & FTMAC100_INT_RPKT_LOST) {
+ /* received packet lost due to RX FIFO full */
+ netdev->stats.rx_fifo_errors++;
+ }
+
+ if (status & FTMAC100_INT_PHYSTS_CHG) {
+ /* PHY link status change */
+ mii_check_link(&priv->mii);
+ }
+ }
+
+ if (completed) {
+ /* stop polling */
+ napi_complete(napi);
+ ftmac100_enable_all_int(priv);
+ }
+
+ return rx;
+}
+
+/******************************************************************************
+ * struct net_device_ops functions
+ *****************************************************************************/
+static int ftmac100_open(struct net_device *netdev)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ int err;
+
+ err = ftmac100_alloc_buffers(priv);
+ if (err) {
+ netdev_err(netdev, "failed to allocate buffers\n");
+ goto err_alloc;
+ }
+
+ err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev);
+ if (err) {
+ netdev_err(netdev, "failed to request irq %d\n", priv->irq);
+ goto err_irq;
+ }
+
+ priv->rx_pointer = 0;
+ priv->tx_clean_pointer = 0;
+ priv->tx_pointer = 0;
+ priv->tx_pending = 0;
+
+ err = ftmac100_start_hw(priv);
+ if (err)
+ goto err_hw;
+
+ napi_enable(&priv->napi);
+ netif_start_queue(netdev);
+
+ ftmac100_enable_all_int(priv);
+
+ return 0;
+
+err_hw:
+ free_irq(priv->irq, netdev);
+err_irq:
+ ftmac100_free_buffers(priv);
+err_alloc:
+ return err;
+}
+
+static int ftmac100_stop(struct net_device *netdev)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+
+ ftmac100_disable_all_int(priv);
+ netif_stop_queue(netdev);
+ napi_disable(&priv->napi);
+ ftmac100_stop_hw(priv);
+ free_irq(priv->irq, netdev);
+ ftmac100_free_buffers(priv);
+
+ return 0;
+}
+
+static int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ dma_addr_t map;
+
+ if (unlikely(skb->len > MAX_PKT_SIZE)) {
+ if (net_ratelimit())
+ netdev_dbg(netdev, "tx packet too big\n");
+
+ netdev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
+ if (unlikely(dma_mapping_error(priv->dev, map))) {
+ /* drop packet */
+ if (net_ratelimit())
+ netdev_err(netdev, "map socket buffer failed\n");
+
+ netdev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ return ftmac100_xmit(priv, skb, map);
+}
+
+/* optional */
+static int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
+{
+ struct ftmac100 *priv = netdev_priv(netdev);
+ struct mii_ioctl_data *data = if_mii(ifr);
+
+ return generic_mii_ioctl(&priv->mii, data, cmd, NULL);
+}
+
+static const struct net_device_ops ftmac100_netdev_ops = {
+ .ndo_open = ftmac100_open,
+ .ndo_stop = ftmac100_stop,
+ .ndo_start_xmit = ftmac100_hard_start_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = ftmac100_do_ioctl,
+};
+
+/******************************************************************************
+ * struct platform_driver functions
+ *****************************************************************************/
+static int ftmac100_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ int irq;
+ struct net_device *netdev;
+ struct ftmac100 *priv;
+ int err;
+
+ if (!pdev)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENXIO;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ /* setup net_device */
+ netdev = alloc_etherdev(sizeof(*priv));
+ if (!netdev) {
+ err = -ENOMEM;
+ goto err_alloc_etherdev;
+ }
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+ SET_ETHTOOL_OPS(netdev, &ftmac100_ethtool_ops);
+ netdev->netdev_ops = &ftmac100_netdev_ops;
+
+ platform_set_drvdata(pdev, netdev);
+
+ /* setup private data */
+ priv = netdev_priv(netdev);
+ priv->netdev = netdev;
+ priv->dev = &pdev->dev;
+
+ spin_lock_init(&priv->tx_lock);
+
+ /* initialize NAPI */
+ netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64);
+
+ /* map io memory */
+ priv->res = request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev));
+ if (!priv->res) {
+ dev_err(&pdev->dev, "Could not reserve memory region\n");
+ err = -ENOMEM;
+ goto err_req_mem;
+ }
+
+ priv->base = ioremap(res->start, resource_size(res));
+ if (!priv->base) {
+ dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
+ err = -EIO;
+ goto err_ioremap;
+ }
+
+ priv->irq = irq;
+
+ /* initialize struct mii_if_info */
+ priv->mii.phy_id = 0;
+ priv->mii.phy_id_mask = 0x1f;
+ priv->mii.reg_num_mask = 0x1f;
+ priv->mii.dev = netdev;
+ priv->mii.mdio_read = ftmac100_mdio_read;
+ priv->mii.mdio_write = ftmac100_mdio_write;
+
+ /* register network device */
+ err = register_netdev(netdev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register netdev\n");
+ goto err_register_netdev;
+ }
+
+ netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
+
+ if (!is_valid_ether_addr(netdev->dev_addr)) {
+ random_ether_addr(netdev->dev_addr);
+ netdev_info(netdev, "generated random MAC address %pM\n",
+ netdev->dev_addr);
+ }
+
+ return 0;
+
+err_register_netdev:
+ iounmap(priv->base);
+err_ioremap:
+ release_resource(priv->res);
+err_req_mem:
+ netif_napi_del(&priv->napi);
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(netdev);
+err_alloc_etherdev:
+ return err;
+}
+
+static int __exit ftmac100_remove(struct platform_device *pdev)
+{
+ struct net_device *netdev;
+ struct ftmac100 *priv;
+
+ netdev = platform_get_drvdata(pdev);
+ priv = netdev_priv(netdev);
+
+ unregister_netdev(netdev);
+
+ iounmap(priv->base);
+ release_resource(priv->res);
+
+ netif_napi_del(&priv->napi);
+ platform_set_drvdata(pdev, NULL);
+ free_netdev(netdev);
+ return 0;
+}
+
+static struct platform_driver ftmac100_driver = {
+ .probe = ftmac100_probe,
+ .remove = __exit_p(ftmac100_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+/******************************************************************************
+ * initialization / finalization
+ *****************************************************************************/
+static int __init ftmac100_init(void)
+{
+ pr_info("Loading version " DRV_VERSION " ...\n");
+ return platform_driver_register(&ftmac100_driver);
+}
+
+static void __exit ftmac100_exit(void)
+{
+ platform_driver_unregister(&ftmac100_driver);
+}
+
+module_init(ftmac100_init);
+module_exit(ftmac100_exit);
+
+MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
+MODULE_DESCRIPTION("FTMAC100 driver");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * Faraday FTMAC100 10/100 Ethernet
+ *
+ * (C) Copyright 2009-2011 Faraday Technology
+ * Po-Yu Chuang <ratbert@faraday-tech.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __FTMAC100_H
+#define __FTMAC100_H
+
+#define FTMAC100_OFFSET_ISR 0x00
+#define FTMAC100_OFFSET_IMR 0x04
+#define FTMAC100_OFFSET_MAC_MADR 0x08
+#define FTMAC100_OFFSET_MAC_LADR 0x0c
+#define FTMAC100_OFFSET_MAHT0 0x10
+#define FTMAC100_OFFSET_MAHT1 0x14
+#define FTMAC100_OFFSET_TXPD 0x18
+#define FTMAC100_OFFSET_RXPD 0x1c
+#define FTMAC100_OFFSET_TXR_BADR 0x20
+#define FTMAC100_OFFSET_RXR_BADR 0x24
+#define FTMAC100_OFFSET_ITC 0x28
+#define FTMAC100_OFFSET_APTC 0x2c
+#define FTMAC100_OFFSET_DBLAC 0x30
+#define FTMAC100_OFFSET_MACCR 0x88
+#define FTMAC100_OFFSET_MACSR 0x8c
+#define FTMAC100_OFFSET_PHYCR 0x90
+#define FTMAC100_OFFSET_PHYWDATA 0x94
+#define FTMAC100_OFFSET_FCR 0x98
+#define FTMAC100_OFFSET_BPR 0x9c
+#define FTMAC100_OFFSET_TS 0xc4
+#define FTMAC100_OFFSET_DMAFIFOS 0xc8
+#define FTMAC100_OFFSET_TM 0xcc
+#define FTMAC100_OFFSET_TX_MCOL_SCOL 0xd4
+#define FTMAC100_OFFSET_RPF_AEP 0xd8
+#define FTMAC100_OFFSET_XM_PG 0xdc
+#define FTMAC100_OFFSET_RUNT_TLCC 0xe0
+#define FTMAC100_OFFSET_CRCER_FTL 0xe4
+#define FTMAC100_OFFSET_RLC_RCC 0xe8
+#define FTMAC100_OFFSET_BROC 0xec
+#define FTMAC100_OFFSET_MULCA 0xf0
+#define FTMAC100_OFFSET_RP 0xf4
+#define FTMAC100_OFFSET_XP 0xf8
+
+/*
+ * Interrupt status register & interrupt mask register
+ */
+#define FTMAC100_INT_RPKT_FINISH (1 << 0)
+#define FTMAC100_INT_NORXBUF (1 << 1)
+#define FTMAC100_INT_XPKT_FINISH (1 << 2)
+#define FTMAC100_INT_NOTXBUF (1 << 3)
+#define FTMAC100_INT_XPKT_OK (1 << 4)
+#define FTMAC100_INT_XPKT_LOST (1 << 5)
+#define FTMAC100_INT_RPKT_SAV (1 << 6)
+#define FTMAC100_INT_RPKT_LOST (1 << 7)
+#define FTMAC100_INT_AHB_ERR (1 << 8)
+#define FTMAC100_INT_PHYSTS_CHG (1 << 9)
+
+/*
+ * Interrupt timer control register
+ */
+#define FTMAC100_ITC_RXINT_CNT(x) (((x) & 0xf) << 0)
+#define FTMAC100_ITC_RXINT_THR(x) (((x) & 0x7) << 4)
+#define FTMAC100_ITC_RXINT_TIME_SEL (1 << 7)
+#define FTMAC100_ITC_TXINT_CNT(x) (((x) & 0xf) << 8)
+#define FTMAC100_ITC_TXINT_THR(x) (((x) & 0x7) << 12)
+#define FTMAC100_ITC_TXINT_TIME_SEL (1 << 15)
+
+/*
+ * Automatic polling timer control register
+ */
+#define FTMAC100_APTC_RXPOLL_CNT(x) (((x) & 0xf) << 0)
+#define FTMAC100_APTC_RXPOLL_TIME_SEL (1 << 4)
+#define FTMAC100_APTC_TXPOLL_CNT(x) (((x) & 0xf) << 8)
+#define FTMAC100_APTC_TXPOLL_TIME_SEL (1 << 12)
+
+/*
+ * DMA burst length and arbitration control register
+ */
+#define FTMAC100_DBLAC_INCR4_EN (1 << 0)
+#define FTMAC100_DBLAC_INCR8_EN (1 << 1)
+#define FTMAC100_DBLAC_INCR16_EN (1 << 2)
+#define FTMAC100_DBLAC_RXFIFO_LTHR(x) (((x) & 0x7) << 3)
+#define FTMAC100_DBLAC_RXFIFO_HTHR(x) (((x) & 0x7) << 6)
+#define FTMAC100_DBLAC_RX_THR_EN (1 << 9)
+
+/*
+ * MAC control register
+ */
+#define FTMAC100_MACCR_XDMA_EN (1 << 0)
+#define FTMAC100_MACCR_RDMA_EN (1 << 1)
+#define FTMAC100_MACCR_SW_RST (1 << 2)
+#define FTMAC100_MACCR_LOOP_EN (1 << 3)
+#define FTMAC100_MACCR_CRC_DIS (1 << 4)
+#define FTMAC100_MACCR_XMT_EN (1 << 5)
+#define FTMAC100_MACCR_ENRX_IN_HALFTX (1 << 6)
+#define FTMAC100_MACCR_RCV_EN (1 << 8)
+#define FTMAC100_MACCR_HT_MULTI_EN (1 << 9)
+#define FTMAC100_MACCR_RX_RUNT (1 << 10)
+#define FTMAC100_MACCR_RX_FTL (1 << 11)
+#define FTMAC100_MACCR_RCV_ALL (1 << 12)
+#define FTMAC100_MACCR_CRC_APD (1 << 14)
+#define FTMAC100_MACCR_FULLDUP (1 << 15)
+#define FTMAC100_MACCR_RX_MULTIPKT (1 << 16)
+#define FTMAC100_MACCR_RX_BROADPKT (1 << 17)
+
+/*
+ * PHY control register
+ */
+#define FTMAC100_PHYCR_MIIRDATA 0xffff
+#define FTMAC100_PHYCR_PHYAD(x) (((x) & 0x1f) << 16)
+#define FTMAC100_PHYCR_REGAD(x) (((x) & 0x1f) << 21)
+#define FTMAC100_PHYCR_MIIRD (1 << 26)
+#define FTMAC100_PHYCR_MIIWR (1 << 27)
+
+/*
+ * PHY write data register
+ */
+#define FTMAC100_PHYWDATA_MIIWDATA(x) ((x) & 0xffff)
+
+/*
+ * Transmit descriptor, aligned to 16 bytes
+ */
+struct ftmac100_txdes {
+ unsigned int txdes0;
+ unsigned int txdes1;
+ unsigned int txdes2; /* TXBUF_BADR */
+ unsigned int txdes3; /* not used by HW */
+} __attribute__ ((aligned(16)));
+
+#define FTMAC100_TXDES0_TXPKT_LATECOL (1 << 0)
+#define FTMAC100_TXDES0_TXPKT_EXSCOL (1 << 1)
+#define FTMAC100_TXDES0_TXDMA_OWN (1 << 31)
+
+#define FTMAC100_TXDES1_TXBUF_SIZE(x) ((x) & 0x7ff)
+#define FTMAC100_TXDES1_LTS (1 << 27)
+#define FTMAC100_TXDES1_FTS (1 << 28)
+#define FTMAC100_TXDES1_TX2FIC (1 << 29)
+#define FTMAC100_TXDES1_TXIC (1 << 30)
+#define FTMAC100_TXDES1_EDOTR (1 << 31)
+
+/*
+ * Receive descriptor, aligned to 16 bytes
+ */
+struct ftmac100_rxdes {
+ unsigned int rxdes0;
+ unsigned int rxdes1;
+ unsigned int rxdes2; /* RXBUF_BADR */
+ unsigned int rxdes3; /* not used by HW */
+} __attribute__ ((aligned(16)));
+
+#define FTMAC100_RXDES0_RFL 0x7ff
+#define FTMAC100_RXDES0_MULTICAST (1 << 16)
+#define FTMAC100_RXDES0_BROADCAST (1 << 17)
+#define FTMAC100_RXDES0_RX_ERR (1 << 18)
+#define FTMAC100_RXDES0_CRC_ERR (1 << 19)
+#define FTMAC100_RXDES0_FTL (1 << 20)
+#define FTMAC100_RXDES0_RUNT (1 << 21)
+#define FTMAC100_RXDES0_RX_ODD_NB (1 << 22)
+#define FTMAC100_RXDES0_LRS (1 << 28)
+#define FTMAC100_RXDES0_FRS (1 << 29)
+#define FTMAC100_RXDES0_RXDMA_OWN (1 << 31)
+
+#define FTMAC100_RXDES1_RXBUF_SIZE(x) ((x) & 0x7ff)
+#define FTMAC100_RXDES1_EDORR (1 << 31)
+
+#endif /* __FTMAC100_H */
+++ /dev/null
-/*
- * Faraday FTGMAC100 Gigabit Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/dma-mapping.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/phy.h>
-#include <linux/platform_device.h>
-#include <net/ip.h>
-
-#include "ftgmac100.h"
-
-#define DRV_NAME "ftgmac100"
-#define DRV_VERSION "0.7"
-
-#define RX_QUEUE_ENTRIES 256 /* must be power of 2 */
-#define TX_QUEUE_ENTRIES 512 /* must be power of 2 */
-
-#define MAX_PKT_SIZE 1518
-#define RX_BUF_SIZE PAGE_SIZE /* must be smaller than 0x3fff */
-
-/******************************************************************************
- * private data
- *****************************************************************************/
-struct ftgmac100_descs {
- struct ftgmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
- struct ftgmac100_txdes txdes[TX_QUEUE_ENTRIES];
-};
-
-struct ftgmac100 {
- struct resource *res;
- void __iomem *base;
- int irq;
-
- struct ftgmac100_descs *descs;
- dma_addr_t descs_dma_addr;
-
- unsigned int rx_pointer;
- unsigned int tx_clean_pointer;
- unsigned int tx_pointer;
- unsigned int tx_pending;
-
- spinlock_t tx_lock;
-
- struct net_device *netdev;
- struct device *dev;
- struct napi_struct napi;
-
- struct mii_bus *mii_bus;
- int phy_irq[PHY_MAX_ADDR];
- struct phy_device *phydev;
- int old_speed;
-};
-
-static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes, gfp_t gfp);
-
-/******************************************************************************
- * internal functions (hardware register access)
- *****************************************************************************/
-#define INT_MASK_ALL_ENABLED (FTGMAC100_INT_RPKT_LOST | \
- FTGMAC100_INT_XPKT_ETH | \
- FTGMAC100_INT_XPKT_LOST | \
- FTGMAC100_INT_AHB_ERR | \
- FTGMAC100_INT_PHYSTS_CHG | \
- FTGMAC100_INT_RPKT_BUF | \
- FTGMAC100_INT_NO_RXBUF)
-
-static void ftgmac100_set_rx_ring_base(struct ftgmac100 *priv, dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTGMAC100_OFFSET_RXR_BADR);
-}
-
-static void ftgmac100_set_rx_buffer_size(struct ftgmac100 *priv,
- unsigned int size)
-{
- size = FTGMAC100_RBSR_SIZE(size);
- iowrite32(size, priv->base + FTGMAC100_OFFSET_RBSR);
-}
-
-static void ftgmac100_set_normal_prio_tx_ring_base(struct ftgmac100 *priv,
- dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTGMAC100_OFFSET_NPTXR_BADR);
-}
-
-static void ftgmac100_txdma_normal_prio_start_polling(struct ftgmac100 *priv)
-{
- iowrite32(1, priv->base + FTGMAC100_OFFSET_NPTXPD);
-}
-
-static int ftgmac100_reset_hw(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- int i;
-
- /* NOTE: reset clears all registers */
- iowrite32(FTGMAC100_MACCR_SW_RST, priv->base + FTGMAC100_OFFSET_MACCR);
- for (i = 0; i < 5; i++) {
- unsigned int maccr;
-
- maccr = ioread32(priv->base + FTGMAC100_OFFSET_MACCR);
- if (!(maccr & FTGMAC100_MACCR_SW_RST))
- return 0;
-
- udelay(1000);
- }
-
- netdev_err(netdev, "software reset failed\n");
- return -EIO;
-}
-
-static void ftgmac100_set_mac(struct ftgmac100 *priv, const unsigned char *mac)
-{
- unsigned int maddr = mac[0] << 8 | mac[1];
- unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
-
- iowrite32(maddr, priv->base + FTGMAC100_OFFSET_MAC_MADR);
- iowrite32(laddr, priv->base + FTGMAC100_OFFSET_MAC_LADR);
-}
-
-static void ftgmac100_init_hw(struct ftgmac100 *priv)
-{
- /* setup ring buffer base registers */
- ftgmac100_set_rx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftgmac100_descs, rxdes));
- ftgmac100_set_normal_prio_tx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftgmac100_descs, txdes));
-
- ftgmac100_set_rx_buffer_size(priv, RX_BUF_SIZE);
-
- iowrite32(FTGMAC100_APTC_RXPOLL_CNT(1), priv->base + FTGMAC100_OFFSET_APTC);
-
- ftgmac100_set_mac(priv, priv->netdev->dev_addr);
-}
-
-#define MACCR_ENABLE_ALL (FTGMAC100_MACCR_TXDMA_EN | \
- FTGMAC100_MACCR_RXDMA_EN | \
- FTGMAC100_MACCR_TXMAC_EN | \
- FTGMAC100_MACCR_RXMAC_EN | \
- FTGMAC100_MACCR_FULLDUP | \
- FTGMAC100_MACCR_CRC_APD | \
- FTGMAC100_MACCR_RX_RUNT | \
- FTGMAC100_MACCR_RX_BROADPKT)
-
-static void ftgmac100_start_hw(struct ftgmac100 *priv, int speed)
-{
- int maccr = MACCR_ENABLE_ALL;
-
- switch (speed) {
- default:
- case 10:
- break;
-
- case 100:
- maccr |= FTGMAC100_MACCR_FAST_MODE;
- break;
-
- case 1000:
- maccr |= FTGMAC100_MACCR_GIGA_MODE;
- break;
- }
-
- iowrite32(maccr, priv->base + FTGMAC100_OFFSET_MACCR);
-}
-
-static void ftgmac100_stop_hw(struct ftgmac100 *priv)
-{
- iowrite32(0, priv->base + FTGMAC100_OFFSET_MACCR);
-}
-
-/******************************************************************************
- * internal functions (receive descriptor)
- *****************************************************************************/
-static bool ftgmac100_rxdes_first_segment(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FRS);
-}
-
-static bool ftgmac100_rxdes_last_segment(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_LRS);
-}
-
-static bool ftgmac100_rxdes_packet_ready(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RXPKT_RDY);
-}
-
-static void ftgmac100_rxdes_set_dma_own(struct ftgmac100_rxdes *rxdes)
-{
- /* clear status bits */
- rxdes->rxdes0 &= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
-}
-
-static bool ftgmac100_rxdes_rx_error(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ERR);
-}
-
-static bool ftgmac100_rxdes_crc_error(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_CRC_ERR);
-}
-
-static bool ftgmac100_rxdes_frame_too_long(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_FTL);
-}
-
-static bool ftgmac100_rxdes_runt(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RUNT);
-}
-
-static bool ftgmac100_rxdes_odd_nibble(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_RX_ODD_NB);
-}
-
-static unsigned int ftgmac100_rxdes_data_length(struct ftgmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes0) & FTGMAC100_RXDES0_VDBC;
-}
-
-static bool ftgmac100_rxdes_multicast(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTGMAC100_RXDES0_MULTICAST);
-}
-
-static void ftgmac100_rxdes_set_end_of_ring(struct ftgmac100_rxdes *rxdes)
-{
- rxdes->rxdes0 |= cpu_to_le32(FTGMAC100_RXDES0_EDORR);
-}
-
-static void ftgmac100_rxdes_set_dma_addr(struct ftgmac100_rxdes *rxdes,
- dma_addr_t addr)
-{
- rxdes->rxdes3 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftgmac100_rxdes_get_dma_addr(struct ftgmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes3);
-}
-
-static bool ftgmac100_rxdes_is_tcp(struct ftgmac100_rxdes *rxdes)
-{
- return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
- cpu_to_le32(FTGMAC100_RXDES1_PROT_TCPIP);
-}
-
-static bool ftgmac100_rxdes_is_udp(struct ftgmac100_rxdes *rxdes)
-{
- return (rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_PROT_MASK)) ==
- cpu_to_le32(FTGMAC100_RXDES1_PROT_UDPIP);
-}
-
-static bool ftgmac100_rxdes_tcpcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_TCP_CHKSUM_ERR);
-}
-
-static bool ftgmac100_rxdes_udpcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_UDP_CHKSUM_ERR);
-}
-
-static bool ftgmac100_rxdes_ipcs_err(struct ftgmac100_rxdes *rxdes)
-{
- return rxdes->rxdes1 & cpu_to_le32(FTGMAC100_RXDES1_IP_CHKSUM_ERR);
-}
-
-/*
- * rxdes2 is not used by hardware. We use it to keep track of page.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftgmac100_rxdes_set_page(struct ftgmac100_rxdes *rxdes, struct page *page)
-{
- rxdes->rxdes2 = (unsigned int)page;
-}
-
-static struct page *ftgmac100_rxdes_get_page(struct ftgmac100_rxdes *rxdes)
-{
- return (struct page *)rxdes->rxdes2;
-}
-
-/******************************************************************************
- * internal functions (receive)
- *****************************************************************************/
-static int ftgmac100_next_rx_pointer(int pointer)
-{
- return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
-}
-
-static void ftgmac100_rx_pointer_advance(struct ftgmac100 *priv)
-{
- priv->rx_pointer = ftgmac100_next_rx_pointer(priv->rx_pointer);
-}
-
-static struct ftgmac100_rxdes *ftgmac100_current_rxdes(struct ftgmac100 *priv)
-{
- return &priv->descs->rxdes[priv->rx_pointer];
-}
-
-static struct ftgmac100_rxdes *
-ftgmac100_rx_locate_first_segment(struct ftgmac100 *priv)
-{
- struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
-
- while (ftgmac100_rxdes_packet_ready(rxdes)) {
- if (ftgmac100_rxdes_first_segment(rxdes))
- return rxdes;
-
- ftgmac100_rxdes_set_dma_own(rxdes);
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- }
-
- return NULL;
-}
-
-static bool ftgmac100_rx_packet_error(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes)
-{
- struct net_device *netdev = priv->netdev;
- bool error = false;
-
- if (unlikely(ftgmac100_rxdes_rx_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx err\n");
-
- netdev->stats.rx_errors++;
- error = true;
- }
-
- if (unlikely(ftgmac100_rxdes_crc_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx crc err\n");
-
- netdev->stats.rx_crc_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_ipcs_err(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx IP checksum err\n");
-
- error = true;
- }
-
- if (unlikely(ftgmac100_rxdes_frame_too_long(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx frame too long\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_runt(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx runt\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftgmac100_rxdes_odd_nibble(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx odd nibble\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- }
-
- return error;
-}
-
-static void ftgmac100_rx_drop_packet(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_rxdes *rxdes = ftgmac100_current_rxdes(priv);
- bool done = false;
-
- if (net_ratelimit())
- netdev_dbg(netdev, "drop packet %p\n", rxdes);
-
- do {
- if (ftgmac100_rxdes_last_segment(rxdes))
- done = true;
-
- ftgmac100_rxdes_set_dma_own(rxdes);
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- } while (!done && ftgmac100_rxdes_packet_ready(rxdes));
-
- netdev->stats.rx_dropped++;
-}
-
-static bool ftgmac100_rx_packet(struct ftgmac100 *priv, int *processed)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_rxdes *rxdes;
- struct sk_buff *skb;
- bool done = false;
-
- rxdes = ftgmac100_rx_locate_first_segment(priv);
- if (!rxdes)
- return false;
-
- if (unlikely(ftgmac100_rx_packet_error(priv, rxdes))) {
- ftgmac100_rx_drop_packet(priv);
- return true;
- }
-
- /* start processing */
- skb = netdev_alloc_skb_ip_align(netdev, 128);
- if (unlikely(!skb)) {
- if (net_ratelimit())
- netdev_err(netdev, "rx skb alloc failed\n");
-
- ftgmac100_rx_drop_packet(priv);
- return true;
- }
-
- if (unlikely(ftgmac100_rxdes_multicast(rxdes)))
- netdev->stats.multicast++;
-
- /*
- * It seems that HW does checksum incorrectly with fragmented packets,
- * so we are conservative here - if HW checksum error, let software do
- * the checksum again.
- */
- if ((ftgmac100_rxdes_is_tcp(rxdes) && !ftgmac100_rxdes_tcpcs_err(rxdes)) ||
- (ftgmac100_rxdes_is_udp(rxdes) && !ftgmac100_rxdes_udpcs_err(rxdes)))
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-
- do {
- dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
- struct page *page = ftgmac100_rxdes_get_page(rxdes);
- unsigned int size;
-
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
-
- size = ftgmac100_rxdes_data_length(rxdes);
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page, 0, size);
-
- skb->len += size;
- skb->data_len += size;
- skb->truesize += size;
-
- if (ftgmac100_rxdes_last_segment(rxdes))
- done = true;
-
- ftgmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
-
- ftgmac100_rx_pointer_advance(priv);
- rxdes = ftgmac100_current_rxdes(priv);
- } while (!done);
-
- __pskb_pull_tail(skb, min(skb->len, 64U));
- skb->protocol = eth_type_trans(skb, netdev);
-
- netdev->stats.rx_packets++;
- netdev->stats.rx_bytes += skb->len;
-
- /* push packet to protocol stack */
- napi_gro_receive(&priv->napi, skb);
-
- (*processed)++;
- return true;
-}
-
-/******************************************************************************
- * internal functions (transmit descriptor)
- *****************************************************************************/
-static void ftgmac100_txdes_reset(struct ftgmac100_txdes *txdes)
-{
- /* clear all except end of ring bit */
- txdes->txdes0 &= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
- txdes->txdes1 = 0;
- txdes->txdes2 = 0;
- txdes->txdes3 = 0;
-}
-
-static bool ftgmac100_txdes_owned_by_dma(struct ftgmac100_txdes *txdes)
-{
- return txdes->txdes0 & cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftgmac100_txdes_set_dma_own(struct ftgmac100_txdes *txdes)
-{
- /*
- * Make sure dma own bit will not be set before any other
- * descriptor fields.
- */
- wmb();
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftgmac100_txdes_set_end_of_ring(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_EDOTR);
-}
-
-static void ftgmac100_txdes_set_first_segment(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_FTS);
-}
-
-static void ftgmac100_txdes_set_last_segment(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_LTS);
-}
-
-static void ftgmac100_txdes_set_buffer_size(struct ftgmac100_txdes *txdes,
- unsigned int len)
-{
- txdes->txdes0 |= cpu_to_le32(FTGMAC100_TXDES0_TXBUF_SIZE(len));
-}
-
-static void ftgmac100_txdes_set_txint(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TXIC);
-}
-
-static void ftgmac100_txdes_set_tcpcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_TCP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_udpcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_UDP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_ipcs(struct ftgmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTGMAC100_TXDES1_IP_CHKSUM);
-}
-
-static void ftgmac100_txdes_set_dma_addr(struct ftgmac100_txdes *txdes,
- dma_addr_t addr)
-{
- txdes->txdes3 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftgmac100_txdes_get_dma_addr(struct ftgmac100_txdes *txdes)
-{
- return le32_to_cpu(txdes->txdes3);
-}
-
-/*
- * txdes2 is not used by hardware. We use it to keep track of socket buffer.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftgmac100_txdes_set_skb(struct ftgmac100_txdes *txdes,
- struct sk_buff *skb)
-{
- txdes->txdes2 = (unsigned int)skb;
-}
-
-static struct sk_buff *ftgmac100_txdes_get_skb(struct ftgmac100_txdes *txdes)
-{
- return (struct sk_buff *)txdes->txdes2;
-}
-
-/******************************************************************************
- * internal functions (transmit)
- *****************************************************************************/
-static int ftgmac100_next_tx_pointer(int pointer)
-{
- return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
-}
-
-static void ftgmac100_tx_pointer_advance(struct ftgmac100 *priv)
-{
- priv->tx_pointer = ftgmac100_next_tx_pointer(priv->tx_pointer);
-}
-
-static void ftgmac100_tx_clean_pointer_advance(struct ftgmac100 *priv)
-{
- priv->tx_clean_pointer = ftgmac100_next_tx_pointer(priv->tx_clean_pointer);
-}
-
-static struct ftgmac100_txdes *ftgmac100_current_txdes(struct ftgmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_pointer];
-}
-
-static struct ftgmac100_txdes *
-ftgmac100_current_clean_txdes(struct ftgmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_clean_pointer];
-}
-
-static bool ftgmac100_tx_complete_packet(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_txdes *txdes;
- struct sk_buff *skb;
- dma_addr_t map;
-
- if (priv->tx_pending == 0)
- return false;
-
- txdes = ftgmac100_current_clean_txdes(priv);
-
- if (ftgmac100_txdes_owned_by_dma(txdes))
- return false;
-
- skb = ftgmac100_txdes_get_skb(txdes);
- map = ftgmac100_txdes_get_dma_addr(txdes);
-
- netdev->stats.tx_packets++;
- netdev->stats.tx_bytes += skb->len;
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
-
- dev_kfree_skb(skb);
-
- ftgmac100_txdes_reset(txdes);
-
- ftgmac100_tx_clean_pointer_advance(priv);
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending--;
- spin_unlock(&priv->tx_lock);
- netif_wake_queue(netdev);
-
- return true;
-}
-
-static void ftgmac100_tx_complete(struct ftgmac100 *priv)
-{
- while (ftgmac100_tx_complete_packet(priv))
- ;
-}
-
-static int ftgmac100_xmit(struct ftgmac100 *priv, struct sk_buff *skb,
- dma_addr_t map)
-{
- struct net_device *netdev = priv->netdev;
- struct ftgmac100_txdes *txdes;
- unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
- txdes = ftgmac100_current_txdes(priv);
- ftgmac100_tx_pointer_advance(priv);
-
- /* setup TX descriptor */
- ftgmac100_txdes_set_skb(txdes, skb);
- ftgmac100_txdes_set_dma_addr(txdes, map);
- ftgmac100_txdes_set_buffer_size(txdes, len);
-
- ftgmac100_txdes_set_first_segment(txdes);
- ftgmac100_txdes_set_last_segment(txdes);
- ftgmac100_txdes_set_txint(txdes);
- if (skb->ip_summed == CHECKSUM_PARTIAL) {
- __be16 protocol = skb->protocol;
-
- if (protocol == cpu_to_be16(ETH_P_IP)) {
- u8 ip_proto = ip_hdr(skb)->protocol;
-
- ftgmac100_txdes_set_ipcs(txdes);
- if (ip_proto == IPPROTO_TCP)
- ftgmac100_txdes_set_tcpcs(txdes);
- else if (ip_proto == IPPROTO_UDP)
- ftgmac100_txdes_set_udpcs(txdes);
- }
- }
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending++;
- if (priv->tx_pending == TX_QUEUE_ENTRIES)
- netif_stop_queue(netdev);
-
- /* start transmit */
- ftgmac100_txdes_set_dma_own(txdes);
- spin_unlock(&priv->tx_lock);
-
- ftgmac100_txdma_normal_prio_start_polling(priv);
-
- return NETDEV_TX_OK;
-}
-
-/******************************************************************************
- * internal functions (buffer)
- *****************************************************************************/
-static int ftgmac100_alloc_rx_page(struct ftgmac100 *priv,
- struct ftgmac100_rxdes *rxdes, gfp_t gfp)
-{
- struct net_device *netdev = priv->netdev;
- struct page *page;
- dma_addr_t map;
-
- page = alloc_page(gfp);
- if (!page) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to allocate rx page\n");
- return -ENOMEM;
- }
-
- map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to map rx page\n");
- __free_page(page);
- return -ENOMEM;
- }
-
- ftgmac100_rxdes_set_page(rxdes, page);
- ftgmac100_rxdes_set_dma_addr(rxdes, map);
- ftgmac100_rxdes_set_dma_own(rxdes);
- return 0;
-}
-
-static void ftgmac100_free_buffers(struct ftgmac100 *priv)
-{
- int i;
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
- struct page *page = ftgmac100_rxdes_get_page(rxdes);
- dma_addr_t map = ftgmac100_rxdes_get_dma_addr(rxdes);
-
- if (!page)
- continue;
-
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
- __free_page(page);
- }
-
- for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_txdes *txdes = &priv->descs->txdes[i];
- struct sk_buff *skb = ftgmac100_txdes_get_skb(txdes);
- dma_addr_t map = ftgmac100_txdes_get_dma_addr(txdes);
-
- if (!skb)
- continue;
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
- dev_kfree_skb(skb);
- }
-
- dma_free_coherent(priv->dev, sizeof(struct ftgmac100_descs),
- priv->descs, priv->descs_dma_addr);
-}
-
-static int ftgmac100_alloc_buffers(struct ftgmac100 *priv)
-{
- int i;
-
- priv->descs = dma_alloc_coherent(priv->dev,
- sizeof(struct ftgmac100_descs),
- &priv->descs_dma_addr, GFP_KERNEL);
- if (!priv->descs)
- return -ENOMEM;
-
- memset(priv->descs, 0, sizeof(struct ftgmac100_descs));
-
- /* initialize RX ring */
- ftgmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftgmac100_rxdes *rxdes = &priv->descs->rxdes[i];
-
- if (ftgmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
- goto err;
- }
-
- /* initialize TX ring */
- ftgmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
- return 0;
-
-err:
- ftgmac100_free_buffers(priv);
- return -ENOMEM;
-}
-
-/******************************************************************************
- * internal functions (mdio)
- *****************************************************************************/
-static void ftgmac100_adjust_link(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- struct phy_device *phydev = priv->phydev;
- int ier;
-
- if (phydev->speed == priv->old_speed)
- return;
-
- priv->old_speed = phydev->speed;
-
- ier = ioread32(priv->base + FTGMAC100_OFFSET_IER);
-
- /* disable all interrupts */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
-
- netif_stop_queue(netdev);
- ftgmac100_stop_hw(priv);
-
- netif_start_queue(netdev);
- ftgmac100_init_hw(priv);
- ftgmac100_start_hw(priv, phydev->speed);
-
- /* re-enable interrupts */
- iowrite32(ier, priv->base + FTGMAC100_OFFSET_IER);
-}
-
-static int ftgmac100_mii_probe(struct ftgmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct phy_device *phydev = NULL;
- int i;
-
- /* search for connect PHY device */
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- struct phy_device *tmp = priv->mii_bus->phy_map[i];
-
- if (tmp) {
- phydev = tmp;
- break;
- }
- }
-
- /* now we are supposed to have a proper phydev, to attach to... */
- if (!phydev) {
- netdev_info(netdev, "%s: no PHY found\n", netdev->name);
- return -ENODEV;
- }
-
- phydev = phy_connect(netdev, dev_name(&phydev->dev),
- &ftgmac100_adjust_link, 0,
- PHY_INTERFACE_MODE_GMII);
-
- if (IS_ERR(phydev)) {
- netdev_err(netdev, "%s: Could not attach to PHY\n", netdev->name);
- return PTR_ERR(phydev);
- }
-
- priv->phydev = phydev;
- return 0;
-}
-
-/******************************************************************************
- * struct mii_bus functions
- *****************************************************************************/
-static int ftgmac100_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
-{
- struct net_device *netdev = bus->priv;
- struct ftgmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int i;
-
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- /* preserve MDC cycle threshold */
- phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
-
- phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
- FTGMAC100_PHYCR_REGAD(regnum) |
- FTGMAC100_PHYCR_MIIRD;
-
- iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTGMAC100_PHYCR_MIIRD) == 0) {
- int data;
-
- data = ioread32(priv->base + FTGMAC100_OFFSET_PHYDATA);
- return FTGMAC100_PHYDATA_MIIRDATA(data);
- }
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio read timed out\n");
- return -EIO;
-}
-
-static int ftgmac100_mdiobus_write(struct mii_bus *bus, int phy_addr,
- int regnum, u16 value)
-{
- struct net_device *netdev = bus->priv;
- struct ftgmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int data;
- int i;
-
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- /* preserve MDC cycle threshold */
- phycr &= FTGMAC100_PHYCR_MDC_CYCTHR_MASK;
-
- phycr |= FTGMAC100_PHYCR_PHYAD(phy_addr) |
- FTGMAC100_PHYCR_REGAD(regnum) |
- FTGMAC100_PHYCR_MIIWR;
-
- data = FTGMAC100_PHYDATA_MIIWDATA(value);
-
- iowrite32(data, priv->base + FTGMAC100_OFFSET_PHYDATA);
- iowrite32(phycr, priv->base + FTGMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTGMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTGMAC100_PHYCR_MIIWR) == 0)
- return 0;
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio write timed out\n");
- return -EIO;
-}
-
-static int ftgmac100_mdiobus_reset(struct mii_bus *bus)
-{
- return 0;
-}
-
-/******************************************************************************
- * struct ethtool_ops functions
- *****************************************************************************/
-static void ftgmac100_get_drvinfo(struct net_device *netdev,
- struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- strcpy(info->bus_info, dev_name(&netdev->dev));
-}
-
-static int ftgmac100_get_settings(struct net_device *netdev,
- struct ethtool_cmd *cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_ethtool_gset(priv->phydev, cmd);
-}
-
-static int ftgmac100_set_settings(struct net_device *netdev,
- struct ethtool_cmd *cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_ethtool_sset(priv->phydev, cmd);
-}
-
-static const struct ethtool_ops ftgmac100_ethtool_ops = {
- .set_settings = ftgmac100_set_settings,
- .get_settings = ftgmac100_get_settings,
- .get_drvinfo = ftgmac100_get_drvinfo,
- .get_link = ethtool_op_get_link,
-};
-
-/******************************************************************************
- * interrupt handler
- *****************************************************************************/
-static irqreturn_t ftgmac100_interrupt(int irq, void *dev_id)
-{
- struct net_device *netdev = dev_id;
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- if (likely(netif_running(netdev))) {
- /* Disable interrupts for polling */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
- napi_schedule(&priv->napi);
- }
-
- return IRQ_HANDLED;
-}
-
-/******************************************************************************
- * struct napi_struct functions
- *****************************************************************************/
-static int ftgmac100_poll(struct napi_struct *napi, int budget)
-{
- struct ftgmac100 *priv = container_of(napi, struct ftgmac100, napi);
- struct net_device *netdev = priv->netdev;
- unsigned int status;
- bool completed = true;
- int rx = 0;
-
- status = ioread32(priv->base + FTGMAC100_OFFSET_ISR);
- iowrite32(status, priv->base + FTGMAC100_OFFSET_ISR);
-
- if (status & (FTGMAC100_INT_RPKT_BUF | FTGMAC100_INT_NO_RXBUF)) {
- /*
- * FTGMAC100_INT_RPKT_BUF:
- * RX DMA has received packets into RX buffer successfully
- *
- * FTGMAC100_INT_NO_RXBUF:
- * RX buffer unavailable
- */
- bool retry;
-
- do {
- retry = ftgmac100_rx_packet(priv, &rx);
- } while (retry && rx < budget);
-
- if (retry && rx == budget)
- completed = false;
- }
-
- if (status & (FTGMAC100_INT_XPKT_ETH | FTGMAC100_INT_XPKT_LOST)) {
- /*
- * FTGMAC100_INT_XPKT_ETH:
- * packet transmitted to ethernet successfully
- *
- * FTGMAC100_INT_XPKT_LOST:
- * packet transmitted to ethernet lost due to late
- * collision or excessive collision
- */
- ftgmac100_tx_complete(priv);
- }
-
- if (status & (FTGMAC100_INT_NO_RXBUF | FTGMAC100_INT_RPKT_LOST |
- FTGMAC100_INT_AHB_ERR | FTGMAC100_INT_PHYSTS_CHG)) {
- if (net_ratelimit())
- netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
- status & FTGMAC100_INT_NO_RXBUF ? "NO_RXBUF " : "",
- status & FTGMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
- status & FTGMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
- status & FTGMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
-
- if (status & FTGMAC100_INT_NO_RXBUF) {
- /* RX buffer unavailable */
- netdev->stats.rx_over_errors++;
- }
-
- if (status & FTGMAC100_INT_RPKT_LOST) {
- /* received packet lost due to RX FIFO full */
- netdev->stats.rx_fifo_errors++;
- }
- }
-
- if (completed) {
- napi_complete(napi);
-
- /* enable all interrupts */
- iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
- }
-
- return rx;
-}
-
-/******************************************************************************
- * struct net_device_ops functions
- *****************************************************************************/
-static int ftgmac100_open(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- int err;
-
- err = ftgmac100_alloc_buffers(priv);
- if (err) {
- netdev_err(netdev, "failed to allocate buffers\n");
- goto err_alloc;
- }
-
- err = request_irq(priv->irq, ftgmac100_interrupt, 0, netdev->name, netdev);
- if (err) {
- netdev_err(netdev, "failed to request irq %d\n", priv->irq);
- goto err_irq;
- }
-
- priv->rx_pointer = 0;
- priv->tx_clean_pointer = 0;
- priv->tx_pointer = 0;
- priv->tx_pending = 0;
-
- err = ftgmac100_reset_hw(priv);
- if (err)
- goto err_hw;
-
- ftgmac100_init_hw(priv);
- ftgmac100_start_hw(priv, 10);
-
- phy_start(priv->phydev);
-
- napi_enable(&priv->napi);
- netif_start_queue(netdev);
-
- /* enable all interrupts */
- iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTGMAC100_OFFSET_IER);
- return 0;
-
-err_hw:
- free_irq(priv->irq, netdev);
-err_irq:
- ftgmac100_free_buffers(priv);
-err_alloc:
- return err;
-}
-
-static int ftgmac100_stop(struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- /* disable all interrupts */
- iowrite32(0, priv->base + FTGMAC100_OFFSET_IER);
-
- netif_stop_queue(netdev);
- napi_disable(&priv->napi);
- phy_stop(priv->phydev);
-
- ftgmac100_stop_hw(priv);
- free_irq(priv->irq, netdev);
- ftgmac100_free_buffers(priv);
-
- return 0;
-}
-
-static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
- struct net_device *netdev)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
- dma_addr_t map;
-
- if (unlikely(skb->len > MAX_PKT_SIZE)) {
- if (net_ratelimit())
- netdev_dbg(netdev, "tx packet too big\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- /* drop packet */
- if (net_ratelimit())
- netdev_err(netdev, "map socket buffer failed\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- return ftgmac100_xmit(priv, skb, map);
-}
-
-/* optional */
-static int ftgmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
-{
- struct ftgmac100 *priv = netdev_priv(netdev);
-
- return phy_mii_ioctl(priv->phydev, ifr, cmd);
-}
-
-static const struct net_device_ops ftgmac100_netdev_ops = {
- .ndo_open = ftgmac100_open,
- .ndo_stop = ftgmac100_stop,
- .ndo_start_xmit = ftgmac100_hard_start_xmit,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_do_ioctl = ftgmac100_do_ioctl,
-};
-
-/******************************************************************************
- * struct platform_driver functions
- *****************************************************************************/
-static int ftgmac100_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int irq;
- struct net_device *netdev;
- struct ftgmac100 *priv;
- int err;
- int i;
-
- if (!pdev)
- return -ENODEV;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENXIO;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- /* setup net_device */
- netdev = alloc_etherdev(sizeof(*priv));
- if (!netdev) {
- err = -ENOMEM;
- goto err_alloc_etherdev;
- }
-
- SET_NETDEV_DEV(netdev, &pdev->dev);
-
- SET_ETHTOOL_OPS(netdev, &ftgmac100_ethtool_ops);
- netdev->netdev_ops = &ftgmac100_netdev_ops;
- netdev->features = NETIF_F_IP_CSUM | NETIF_F_GRO;
-
- platform_set_drvdata(pdev, netdev);
-
- /* setup private data */
- priv = netdev_priv(netdev);
- priv->netdev = netdev;
- priv->dev = &pdev->dev;
-
- spin_lock_init(&priv->tx_lock);
-
- /* initialize NAPI */
- netif_napi_add(netdev, &priv->napi, ftgmac100_poll, 64);
-
- /* map io memory */
- priv->res = request_mem_region(res->start, resource_size(res),
- dev_name(&pdev->dev));
- if (!priv->res) {
- dev_err(&pdev->dev, "Could not reserve memory region\n");
- err = -ENOMEM;
- goto err_req_mem;
- }
-
- priv->base = ioremap(res->start, resource_size(res));
- if (!priv->base) {
- dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
- err = -EIO;
- goto err_ioremap;
- }
-
- priv->irq = irq;
-
- /* initialize mdio bus */
- priv->mii_bus = mdiobus_alloc();
- if (!priv->mii_bus) {
- err = -EIO;
- goto err_alloc_mdiobus;
- }
-
- priv->mii_bus->name = "ftgmac100_mdio";
- snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "ftgmac100_mii");
-
- priv->mii_bus->priv = netdev;
- priv->mii_bus->read = ftgmac100_mdiobus_read;
- priv->mii_bus->write = ftgmac100_mdiobus_write;
- priv->mii_bus->reset = ftgmac100_mdiobus_reset;
- priv->mii_bus->irq = priv->phy_irq;
-
- for (i = 0; i < PHY_MAX_ADDR; i++)
- priv->mii_bus->irq[i] = PHY_POLL;
-
- err = mdiobus_register(priv->mii_bus);
- if (err) {
- dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
- goto err_register_mdiobus;
- }
-
- err = ftgmac100_mii_probe(priv);
- if (err) {
- dev_err(&pdev->dev, "MII Probe failed!\n");
- goto err_mii_probe;
- }
-
- /* register network device */
- err = register_netdev(netdev);
- if (err) {
- dev_err(&pdev->dev, "Failed to register netdev\n");
- goto err_register_netdev;
- }
-
- netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
-
- if (!is_valid_ether_addr(netdev->dev_addr)) {
- random_ether_addr(netdev->dev_addr);
- netdev_info(netdev, "generated random MAC address %pM\n",
- netdev->dev_addr);
- }
-
- return 0;
-
-err_register_netdev:
- phy_disconnect(priv->phydev);
-err_mii_probe:
- mdiobus_unregister(priv->mii_bus);
-err_register_mdiobus:
- mdiobus_free(priv->mii_bus);
-err_alloc_mdiobus:
- iounmap(priv->base);
-err_ioremap:
- release_resource(priv->res);
-err_req_mem:
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
-err_alloc_etherdev:
- return err;
-}
-
-static int __exit ftgmac100_remove(struct platform_device *pdev)
-{
- struct net_device *netdev;
- struct ftgmac100 *priv;
-
- netdev = platform_get_drvdata(pdev);
- priv = netdev_priv(netdev);
-
- unregister_netdev(netdev);
-
- phy_disconnect(priv->phydev);
- mdiobus_unregister(priv->mii_bus);
- mdiobus_free(priv->mii_bus);
-
- iounmap(priv->base);
- release_resource(priv->res);
-
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
- return 0;
-}
-
-static struct platform_driver ftgmac100_driver = {
- .probe = ftgmac100_probe,
- .remove = __exit_p(ftgmac100_remove),
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-/******************************************************************************
- * initialization / finalization
- *****************************************************************************/
-static int __init ftgmac100_init(void)
-{
- pr_info("Loading version " DRV_VERSION " ...\n");
- return platform_driver_register(&ftgmac100_driver);
-}
-
-static void __exit ftgmac100_exit(void)
-{
- platform_driver_unregister(&ftgmac100_driver);
-}
-
-module_init(ftgmac100_init);
-module_exit(ftgmac100_exit);
-
-MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
-MODULE_DESCRIPTION("FTGMAC100 driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Faraday FTGMAC100 Gigabit Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __FTGMAC100_H
-#define __FTGMAC100_H
-
-#define FTGMAC100_OFFSET_ISR 0x00
-#define FTGMAC100_OFFSET_IER 0x04
-#define FTGMAC100_OFFSET_MAC_MADR 0x08
-#define FTGMAC100_OFFSET_MAC_LADR 0x0c
-#define FTGMAC100_OFFSET_MAHT0 0x10
-#define FTGMAC100_OFFSET_MAHT1 0x14
-#define FTGMAC100_OFFSET_NPTXPD 0x18
-#define FTGMAC100_OFFSET_RXPD 0x1c
-#define FTGMAC100_OFFSET_NPTXR_BADR 0x20
-#define FTGMAC100_OFFSET_RXR_BADR 0x24
-#define FTGMAC100_OFFSET_HPTXPD 0x28
-#define FTGMAC100_OFFSET_HPTXR_BADR 0x2c
-#define FTGMAC100_OFFSET_ITC 0x30
-#define FTGMAC100_OFFSET_APTC 0x34
-#define FTGMAC100_OFFSET_DBLAC 0x38
-#define FTGMAC100_OFFSET_DMAFIFOS 0x3c
-#define FTGMAC100_OFFSET_REVR 0x40
-#define FTGMAC100_OFFSET_FEAR 0x44
-#define FTGMAC100_OFFSET_TPAFCR 0x48
-#define FTGMAC100_OFFSET_RBSR 0x4c
-#define FTGMAC100_OFFSET_MACCR 0x50
-#define FTGMAC100_OFFSET_MACSR 0x54
-#define FTGMAC100_OFFSET_TM 0x58
-#define FTGMAC100_OFFSET_PHYCR 0x60
-#define FTGMAC100_OFFSET_PHYDATA 0x64
-#define FTGMAC100_OFFSET_FCR 0x68
-#define FTGMAC100_OFFSET_BPR 0x6c
-#define FTGMAC100_OFFSET_WOLCR 0x70
-#define FTGMAC100_OFFSET_WOLSR 0x74
-#define FTGMAC100_OFFSET_WFCRC 0x78
-#define FTGMAC100_OFFSET_WFBM1 0x80
-#define FTGMAC100_OFFSET_WFBM2 0x84
-#define FTGMAC100_OFFSET_WFBM3 0x88
-#define FTGMAC100_OFFSET_WFBM4 0x8c
-#define FTGMAC100_OFFSET_NPTXR_PTR 0x90
-#define FTGMAC100_OFFSET_HPTXR_PTR 0x94
-#define FTGMAC100_OFFSET_RXR_PTR 0x98
-#define FTGMAC100_OFFSET_TX 0xa0
-#define FTGMAC100_OFFSET_TX_MCOL_SCOL 0xa4
-#define FTGMAC100_OFFSET_TX_ECOL_FAIL 0xa8
-#define FTGMAC100_OFFSET_TX_LCOL_UND 0xac
-#define FTGMAC100_OFFSET_RX 0xb0
-#define FTGMAC100_OFFSET_RX_BC 0xb4
-#define FTGMAC100_OFFSET_RX_MC 0xb8
-#define FTGMAC100_OFFSET_RX_PF_AEP 0xbc
-#define FTGMAC100_OFFSET_RX_RUNT 0xc0
-#define FTGMAC100_OFFSET_RX_CRCER_FTL 0xc4
-#define FTGMAC100_OFFSET_RX_COL_LOST 0xc8
-
-/*
- * Interrupt status register & interrupt enable register
- */
-#define FTGMAC100_INT_RPKT_BUF (1 << 0)
-#define FTGMAC100_INT_RPKT_FIFO (1 << 1)
-#define FTGMAC100_INT_NO_RXBUF (1 << 2)
-#define FTGMAC100_INT_RPKT_LOST (1 << 3)
-#define FTGMAC100_INT_XPKT_ETH (1 << 4)
-#define FTGMAC100_INT_XPKT_FIFO (1 << 5)
-#define FTGMAC100_INT_NO_NPTXBUF (1 << 6)
-#define FTGMAC100_INT_XPKT_LOST (1 << 7)
-#define FTGMAC100_INT_AHB_ERR (1 << 8)
-#define FTGMAC100_INT_PHYSTS_CHG (1 << 9)
-#define FTGMAC100_INT_NO_HPTXBUF (1 << 10)
-
-/*
- * Interrupt timer control register
- */
-#define FTGMAC100_ITC_RXINT_CNT(x) (((x) & 0xf) << 0)
-#define FTGMAC100_ITC_RXINT_THR(x) (((x) & 0x7) << 4)
-#define FTGMAC100_ITC_RXINT_TIME_SEL (1 << 7)
-#define FTGMAC100_ITC_TXINT_CNT(x) (((x) & 0xf) << 8)
-#define FTGMAC100_ITC_TXINT_THR(x) (((x) & 0x7) << 12)
-#define FTGMAC100_ITC_TXINT_TIME_SEL (1 << 15)
-
-/*
- * Automatic polling timer control register
- */
-#define FTGMAC100_APTC_RXPOLL_CNT(x) (((x) & 0xf) << 0)
-#define FTGMAC100_APTC_RXPOLL_TIME_SEL (1 << 4)
-#define FTGMAC100_APTC_TXPOLL_CNT(x) (((x) & 0xf) << 8)
-#define FTGMAC100_APTC_TXPOLL_TIME_SEL (1 << 12)
-
-/*
- * DMA burst length and arbitration control register
- */
-#define FTGMAC100_DBLAC_RXFIFO_LTHR(x) (((x) & 0x7) << 0)
-#define FTGMAC100_DBLAC_RXFIFO_HTHR(x) (((x) & 0x7) << 3)
-#define FTGMAC100_DBLAC_RX_THR_EN (1 << 6)
-#define FTGMAC100_DBLAC_RXBURST_SIZE(x) (((x) & 0x3) << 8)
-#define FTGMAC100_DBLAC_TXBURST_SIZE(x) (((x) & 0x3) << 10)
-#define FTGMAC100_DBLAC_RXDES_SIZE(x) (((x) & 0xf) << 12)
-#define FTGMAC100_DBLAC_TXDES_SIZE(x) (((x) & 0xf) << 16)
-#define FTGMAC100_DBLAC_IFG_CNT(x) (((x) & 0x7) << 20)
-#define FTGMAC100_DBLAC_IFG_INC (1 << 23)
-
-/*
- * DMA FIFO status register
- */
-#define FTGMAC100_DMAFIFOS_RXDMA1_SM(dmafifos) ((dmafifos) & 0xf)
-#define FTGMAC100_DMAFIFOS_RXDMA2_SM(dmafifos) (((dmafifos) >> 4) & 0xf)
-#define FTGMAC100_DMAFIFOS_RXDMA3_SM(dmafifos) (((dmafifos) >> 8) & 0x7)
-#define FTGMAC100_DMAFIFOS_TXDMA1_SM(dmafifos) (((dmafifos) >> 12) & 0xf)
-#define FTGMAC100_DMAFIFOS_TXDMA2_SM(dmafifos) (((dmafifos) >> 16) & 0x3)
-#define FTGMAC100_DMAFIFOS_TXDMA3_SM(dmafifos) (((dmafifos) >> 18) & 0xf)
-#define FTGMAC100_DMAFIFOS_RXFIFO_EMPTY (1 << 26)
-#define FTGMAC100_DMAFIFOS_TXFIFO_EMPTY (1 << 27)
-#define FTGMAC100_DMAFIFOS_RXDMA_GRANT (1 << 28)
-#define FTGMAC100_DMAFIFOS_TXDMA_GRANT (1 << 29)
-#define FTGMAC100_DMAFIFOS_RXDMA_REQ (1 << 30)
-#define FTGMAC100_DMAFIFOS_TXDMA_REQ (1 << 31)
-
-/*
- * Receive buffer size register
- */
-#define FTGMAC100_RBSR_SIZE(x) ((x) & 0x3fff)
-
-/*
- * MAC control register
- */
-#define FTGMAC100_MACCR_TXDMA_EN (1 << 0)
-#define FTGMAC100_MACCR_RXDMA_EN (1 << 1)
-#define FTGMAC100_MACCR_TXMAC_EN (1 << 2)
-#define FTGMAC100_MACCR_RXMAC_EN (1 << 3)
-#define FTGMAC100_MACCR_RM_VLAN (1 << 4)
-#define FTGMAC100_MACCR_HPTXR_EN (1 << 5)
-#define FTGMAC100_MACCR_LOOP_EN (1 << 6)
-#define FTGMAC100_MACCR_ENRX_IN_HALFTX (1 << 7)
-#define FTGMAC100_MACCR_FULLDUP (1 << 8)
-#define FTGMAC100_MACCR_GIGA_MODE (1 << 9)
-#define FTGMAC100_MACCR_CRC_APD (1 << 10)
-#define FTGMAC100_MACCR_RX_RUNT (1 << 12)
-#define FTGMAC100_MACCR_JUMBO_LF (1 << 13)
-#define FTGMAC100_MACCR_RX_ALL (1 << 14)
-#define FTGMAC100_MACCR_HT_MULTI_EN (1 << 15)
-#define FTGMAC100_MACCR_RX_MULTIPKT (1 << 16)
-#define FTGMAC100_MACCR_RX_BROADPKT (1 << 17)
-#define FTGMAC100_MACCR_DISCARD_CRCERR (1 << 18)
-#define FTGMAC100_MACCR_FAST_MODE (1 << 19)
-#define FTGMAC100_MACCR_SW_RST (1 << 31)
-
-/*
- * PHY control register
- */
-#define FTGMAC100_PHYCR_MDC_CYCTHR_MASK 0x3f
-#define FTGMAC100_PHYCR_MDC_CYCTHR(x) ((x) & 0x3f)
-#define FTGMAC100_PHYCR_PHYAD(x) (((x) & 0x1f) << 16)
-#define FTGMAC100_PHYCR_REGAD(x) (((x) & 0x1f) << 21)
-#define FTGMAC100_PHYCR_MIIRD (1 << 26)
-#define FTGMAC100_PHYCR_MIIWR (1 << 27)
-
-/*
- * PHY data register
- */
-#define FTGMAC100_PHYDATA_MIIWDATA(x) ((x) & 0xffff)
-#define FTGMAC100_PHYDATA_MIIRDATA(phydata) (((phydata) >> 16) & 0xffff)
-
-/*
- * Transmit descriptor, aligned to 16 bytes
- */
-struct ftgmac100_txdes {
- unsigned int txdes0;
- unsigned int txdes1;
- unsigned int txdes2; /* not used by HW */
- unsigned int txdes3; /* TXBUF_BADR */
-} __attribute__ ((aligned(16)));
-
-#define FTGMAC100_TXDES0_TXBUF_SIZE(x) ((x) & 0x3fff)
-#define FTGMAC100_TXDES0_EDOTR (1 << 15)
-#define FTGMAC100_TXDES0_CRC_ERR (1 << 19)
-#define FTGMAC100_TXDES0_LTS (1 << 28)
-#define FTGMAC100_TXDES0_FTS (1 << 29)
-#define FTGMAC100_TXDES0_TXDMA_OWN (1 << 31)
-
-#define FTGMAC100_TXDES1_VLANTAG_CI(x) ((x) & 0xffff)
-#define FTGMAC100_TXDES1_INS_VLANTAG (1 << 16)
-#define FTGMAC100_TXDES1_TCP_CHKSUM (1 << 17)
-#define FTGMAC100_TXDES1_UDP_CHKSUM (1 << 18)
-#define FTGMAC100_TXDES1_IP_CHKSUM (1 << 19)
-#define FTGMAC100_TXDES1_LLC (1 << 22)
-#define FTGMAC100_TXDES1_TX2FIC (1 << 30)
-#define FTGMAC100_TXDES1_TXIC (1 << 31)
-
-/*
- * Receive descriptor, aligned to 16 bytes
- */
-struct ftgmac100_rxdes {
- unsigned int rxdes0;
- unsigned int rxdes1;
- unsigned int rxdes2; /* not used by HW */
- unsigned int rxdes3; /* RXBUF_BADR */
-} __attribute__ ((aligned(16)));
-
-#define FTGMAC100_RXDES0_VDBC 0x3fff
-#define FTGMAC100_RXDES0_EDORR (1 << 15)
-#define FTGMAC100_RXDES0_MULTICAST (1 << 16)
-#define FTGMAC100_RXDES0_BROADCAST (1 << 17)
-#define FTGMAC100_RXDES0_RX_ERR (1 << 18)
-#define FTGMAC100_RXDES0_CRC_ERR (1 << 19)
-#define FTGMAC100_RXDES0_FTL (1 << 20)
-#define FTGMAC100_RXDES0_RUNT (1 << 21)
-#define FTGMAC100_RXDES0_RX_ODD_NB (1 << 22)
-#define FTGMAC100_RXDES0_FIFO_FULL (1 << 23)
-#define FTGMAC100_RXDES0_PAUSE_OPCODE (1 << 24)
-#define FTGMAC100_RXDES0_PAUSE_FRAME (1 << 25)
-#define FTGMAC100_RXDES0_LRS (1 << 28)
-#define FTGMAC100_RXDES0_FRS (1 << 29)
-#define FTGMAC100_RXDES0_RXPKT_RDY (1 << 31)
-
-#define FTGMAC100_RXDES1_VLANTAG_CI 0xffff
-#define FTGMAC100_RXDES1_PROT_MASK (0x3 << 20)
-#define FTGMAC100_RXDES1_PROT_NONIP (0x0 << 20)
-#define FTGMAC100_RXDES1_PROT_IP (0x1 << 20)
-#define FTGMAC100_RXDES1_PROT_TCPIP (0x2 << 20)
-#define FTGMAC100_RXDES1_PROT_UDPIP (0x3 << 20)
-#define FTGMAC100_RXDES1_LLC (1 << 22)
-#define FTGMAC100_RXDES1_DF (1 << 23)
-#define FTGMAC100_RXDES1_VLANTAG_AVAIL (1 << 24)
-#define FTGMAC100_RXDES1_TCP_CHKSUM_ERR (1 << 25)
-#define FTGMAC100_RXDES1_UDP_CHKSUM_ERR (1 << 26)
-#define FTGMAC100_RXDES1_IP_CHKSUM_ERR (1 << 27)
-
-#endif /* __FTGMAC100_H */
+++ /dev/null
-/*
- * Faraday FTMAC100 10/100 Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/dma-mapping.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/mii.h>
-#include <linux/module.h>
-#include <linux/netdevice.h>
-#include <linux/platform_device.h>
-
-#include "ftmac100.h"
-
-#define DRV_NAME "ftmac100"
-#define DRV_VERSION "0.2"
-
-#define RX_QUEUE_ENTRIES 128 /* must be power of 2 */
-#define TX_QUEUE_ENTRIES 16 /* must be power of 2 */
-
-#define MAX_PKT_SIZE 1518
-#define RX_BUF_SIZE 2044 /* must be smaller than 0x7ff */
-
-#if MAX_PKT_SIZE > 0x7ff
-#error invalid MAX_PKT_SIZE
-#endif
-
-#if RX_BUF_SIZE > 0x7ff || RX_BUF_SIZE > PAGE_SIZE
-#error invalid RX_BUF_SIZE
-#endif
-
-/******************************************************************************
- * private data
- *****************************************************************************/
-struct ftmac100_descs {
- struct ftmac100_rxdes rxdes[RX_QUEUE_ENTRIES];
- struct ftmac100_txdes txdes[TX_QUEUE_ENTRIES];
-};
-
-struct ftmac100 {
- struct resource *res;
- void __iomem *base;
- int irq;
-
- struct ftmac100_descs *descs;
- dma_addr_t descs_dma_addr;
-
- unsigned int rx_pointer;
- unsigned int tx_clean_pointer;
- unsigned int tx_pointer;
- unsigned int tx_pending;
-
- spinlock_t tx_lock;
-
- struct net_device *netdev;
- struct device *dev;
- struct napi_struct napi;
-
- struct mii_if_info mii;
-};
-
-static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
- struct ftmac100_rxdes *rxdes, gfp_t gfp);
-
-/******************************************************************************
- * internal functions (hardware register access)
- *****************************************************************************/
-#define INT_MASK_ALL_ENABLED (FTMAC100_INT_RPKT_FINISH | \
- FTMAC100_INT_NORXBUF | \
- FTMAC100_INT_XPKT_OK | \
- FTMAC100_INT_XPKT_LOST | \
- FTMAC100_INT_RPKT_LOST | \
- FTMAC100_INT_AHB_ERR | \
- FTMAC100_INT_PHYSTS_CHG)
-
-#define INT_MASK_ALL_DISABLED 0
-
-static void ftmac100_enable_all_int(struct ftmac100 *priv)
-{
- iowrite32(INT_MASK_ALL_ENABLED, priv->base + FTMAC100_OFFSET_IMR);
-}
-
-static void ftmac100_disable_all_int(struct ftmac100 *priv)
-{
- iowrite32(INT_MASK_ALL_DISABLED, priv->base + FTMAC100_OFFSET_IMR);
-}
-
-static void ftmac100_set_rx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTMAC100_OFFSET_RXR_BADR);
-}
-
-static void ftmac100_set_tx_ring_base(struct ftmac100 *priv, dma_addr_t addr)
-{
- iowrite32(addr, priv->base + FTMAC100_OFFSET_TXR_BADR);
-}
-
-static void ftmac100_txdma_start_polling(struct ftmac100 *priv)
-{
- iowrite32(1, priv->base + FTMAC100_OFFSET_TXPD);
-}
-
-static int ftmac100_reset(struct ftmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- int i;
-
- /* NOTE: reset clears all registers */
- iowrite32(FTMAC100_MACCR_SW_RST, priv->base + FTMAC100_OFFSET_MACCR);
-
- for (i = 0; i < 5; i++) {
- unsigned int maccr;
-
- maccr = ioread32(priv->base + FTMAC100_OFFSET_MACCR);
- if (!(maccr & FTMAC100_MACCR_SW_RST)) {
- /*
- * FTMAC100_MACCR_SW_RST cleared does not indicate
- * that hardware reset completed (what the f*ck).
- * We still need to wait for a while.
- */
- udelay(500);
- return 0;
- }
-
- udelay(1000);
- }
-
- netdev_err(netdev, "software reset failed\n");
- return -EIO;
-}
-
-static void ftmac100_set_mac(struct ftmac100 *priv, const unsigned char *mac)
-{
- unsigned int maddr = mac[0] << 8 | mac[1];
- unsigned int laddr = mac[2] << 24 | mac[3] << 16 | mac[4] << 8 | mac[5];
-
- iowrite32(maddr, priv->base + FTMAC100_OFFSET_MAC_MADR);
- iowrite32(laddr, priv->base + FTMAC100_OFFSET_MAC_LADR);
-}
-
-#define MACCR_ENABLE_ALL (FTMAC100_MACCR_XMT_EN | \
- FTMAC100_MACCR_RCV_EN | \
- FTMAC100_MACCR_XDMA_EN | \
- FTMAC100_MACCR_RDMA_EN | \
- FTMAC100_MACCR_CRC_APD | \
- FTMAC100_MACCR_FULLDUP | \
- FTMAC100_MACCR_RX_RUNT | \
- FTMAC100_MACCR_RX_BROADPKT)
-
-static int ftmac100_start_hw(struct ftmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
-
- if (ftmac100_reset(priv))
- return -EIO;
-
- /* setup ring buffer base registers */
- ftmac100_set_rx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftmac100_descs, rxdes));
- ftmac100_set_tx_ring_base(priv,
- priv->descs_dma_addr +
- offsetof(struct ftmac100_descs, txdes));
-
- iowrite32(FTMAC100_APTC_RXPOLL_CNT(1), priv->base + FTMAC100_OFFSET_APTC);
-
- ftmac100_set_mac(priv, netdev->dev_addr);
-
- iowrite32(MACCR_ENABLE_ALL, priv->base + FTMAC100_OFFSET_MACCR);
- return 0;
-}
-
-static void ftmac100_stop_hw(struct ftmac100 *priv)
-{
- iowrite32(0, priv->base + FTMAC100_OFFSET_MACCR);
-}
-
-/******************************************************************************
- * internal functions (receive descriptor)
- *****************************************************************************/
-static bool ftmac100_rxdes_first_segment(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FRS);
-}
-
-static bool ftmac100_rxdes_last_segment(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_LRS);
-}
-
-static bool ftmac100_rxdes_owned_by_dma(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
-}
-
-static void ftmac100_rxdes_set_dma_own(struct ftmac100_rxdes *rxdes)
-{
- /* clear status bits */
- rxdes->rxdes0 = cpu_to_le32(FTMAC100_RXDES0_RXDMA_OWN);
-}
-
-static bool ftmac100_rxdes_rx_error(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ERR);
-}
-
-static bool ftmac100_rxdes_crc_error(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_CRC_ERR);
-}
-
-static bool ftmac100_rxdes_frame_too_long(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_FTL);
-}
-
-static bool ftmac100_rxdes_runt(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RUNT);
-}
-
-static bool ftmac100_rxdes_odd_nibble(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_RX_ODD_NB);
-}
-
-static unsigned int ftmac100_rxdes_frame_length(struct ftmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes0) & FTMAC100_RXDES0_RFL;
-}
-
-static bool ftmac100_rxdes_multicast(struct ftmac100_rxdes *rxdes)
-{
- return rxdes->rxdes0 & cpu_to_le32(FTMAC100_RXDES0_MULTICAST);
-}
-
-static void ftmac100_rxdes_set_buffer_size(struct ftmac100_rxdes *rxdes,
- unsigned int size)
-{
- rxdes->rxdes1 &= cpu_to_le32(FTMAC100_RXDES1_EDORR);
- rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_RXBUF_SIZE(size));
-}
-
-static void ftmac100_rxdes_set_end_of_ring(struct ftmac100_rxdes *rxdes)
-{
- rxdes->rxdes1 |= cpu_to_le32(FTMAC100_RXDES1_EDORR);
-}
-
-static void ftmac100_rxdes_set_dma_addr(struct ftmac100_rxdes *rxdes,
- dma_addr_t addr)
-{
- rxdes->rxdes2 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftmac100_rxdes_get_dma_addr(struct ftmac100_rxdes *rxdes)
-{
- return le32_to_cpu(rxdes->rxdes2);
-}
-
-/*
- * rxdes3 is not used by hardware. We use it to keep track of page.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftmac100_rxdes_set_page(struct ftmac100_rxdes *rxdes, struct page *page)
-{
- rxdes->rxdes3 = (unsigned int)page;
-}
-
-static struct page *ftmac100_rxdes_get_page(struct ftmac100_rxdes *rxdes)
-{
- return (struct page *)rxdes->rxdes3;
-}
-
-/******************************************************************************
- * internal functions (receive)
- *****************************************************************************/
-static int ftmac100_next_rx_pointer(int pointer)
-{
- return (pointer + 1) & (RX_QUEUE_ENTRIES - 1);
-}
-
-static void ftmac100_rx_pointer_advance(struct ftmac100 *priv)
-{
- priv->rx_pointer = ftmac100_next_rx_pointer(priv->rx_pointer);
-}
-
-static struct ftmac100_rxdes *ftmac100_current_rxdes(struct ftmac100 *priv)
-{
- return &priv->descs->rxdes[priv->rx_pointer];
-}
-
-static struct ftmac100_rxdes *
-ftmac100_rx_locate_first_segment(struct ftmac100 *priv)
-{
- struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
-
- while (!ftmac100_rxdes_owned_by_dma(rxdes)) {
- if (ftmac100_rxdes_first_segment(rxdes))
- return rxdes;
-
- ftmac100_rxdes_set_dma_own(rxdes);
- ftmac100_rx_pointer_advance(priv);
- rxdes = ftmac100_current_rxdes(priv);
- }
-
- return NULL;
-}
-
-static bool ftmac100_rx_packet_error(struct ftmac100 *priv,
- struct ftmac100_rxdes *rxdes)
-{
- struct net_device *netdev = priv->netdev;
- bool error = false;
-
- if (unlikely(ftmac100_rxdes_rx_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx err\n");
-
- netdev->stats.rx_errors++;
- error = true;
- }
-
- if (unlikely(ftmac100_rxdes_crc_error(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx crc err\n");
-
- netdev->stats.rx_crc_errors++;
- error = true;
- }
-
- if (unlikely(ftmac100_rxdes_frame_too_long(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx frame too long\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftmac100_rxdes_runt(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx runt\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- } else if (unlikely(ftmac100_rxdes_odd_nibble(rxdes))) {
- if (net_ratelimit())
- netdev_info(netdev, "rx odd nibble\n");
-
- netdev->stats.rx_length_errors++;
- error = true;
- }
-
- return error;
-}
-
-static void ftmac100_rx_drop_packet(struct ftmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftmac100_rxdes *rxdes = ftmac100_current_rxdes(priv);
- bool done = false;
-
- if (net_ratelimit())
- netdev_dbg(netdev, "drop packet %p\n", rxdes);
-
- do {
- if (ftmac100_rxdes_last_segment(rxdes))
- done = true;
-
- ftmac100_rxdes_set_dma_own(rxdes);
- ftmac100_rx_pointer_advance(priv);
- rxdes = ftmac100_current_rxdes(priv);
- } while (!done && !ftmac100_rxdes_owned_by_dma(rxdes));
-
- netdev->stats.rx_dropped++;
-}
-
-static bool ftmac100_rx_packet(struct ftmac100 *priv, int *processed)
-{
- struct net_device *netdev = priv->netdev;
- struct ftmac100_rxdes *rxdes;
- struct sk_buff *skb;
- struct page *page;
- dma_addr_t map;
- int length;
-
- rxdes = ftmac100_rx_locate_first_segment(priv);
- if (!rxdes)
- return false;
-
- if (unlikely(ftmac100_rx_packet_error(priv, rxdes))) {
- ftmac100_rx_drop_packet(priv);
- return true;
- }
-
- /*
- * It is impossible to get multi-segment packets
- * because we always provide big enough receive buffers.
- */
- if (unlikely(!ftmac100_rxdes_last_segment(rxdes)))
- BUG();
-
- /* start processing */
- skb = netdev_alloc_skb_ip_align(netdev, 128);
- if (unlikely(!skb)) {
- if (net_ratelimit())
- netdev_err(netdev, "rx skb alloc failed\n");
-
- ftmac100_rx_drop_packet(priv);
- return true;
- }
-
- if (unlikely(ftmac100_rxdes_multicast(rxdes)))
- netdev->stats.multicast++;
-
- map = ftmac100_rxdes_get_dma_addr(rxdes);
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
-
- length = ftmac100_rxdes_frame_length(rxdes);
- page = ftmac100_rxdes_get_page(rxdes);
- skb_fill_page_desc(skb, 0, page, 0, length);
- skb->len += length;
- skb->data_len += length;
- skb->truesize += length;
- __pskb_pull_tail(skb, min(length, 64));
-
- ftmac100_alloc_rx_page(priv, rxdes, GFP_ATOMIC);
-
- ftmac100_rx_pointer_advance(priv);
-
- skb->protocol = eth_type_trans(skb, netdev);
-
- netdev->stats.rx_packets++;
- netdev->stats.rx_bytes += skb->len;
-
- /* push packet to protocol stack */
- netif_receive_skb(skb);
-
- (*processed)++;
- return true;
-}
-
-/******************************************************************************
- * internal functions (transmit descriptor)
- *****************************************************************************/
-static void ftmac100_txdes_reset(struct ftmac100_txdes *txdes)
-{
- /* clear all except end of ring bit */
- txdes->txdes0 = 0;
- txdes->txdes1 &= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
- txdes->txdes2 = 0;
- txdes->txdes3 = 0;
-}
-
-static bool ftmac100_txdes_owned_by_dma(struct ftmac100_txdes *txdes)
-{
- return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
-}
-
-static void ftmac100_txdes_set_dma_own(struct ftmac100_txdes *txdes)
-{
- /*
- * Make sure dma own bit will not be set before any other
- * descriptor fields.
- */
- wmb();
- txdes->txdes0 |= cpu_to_le32(FTMAC100_TXDES0_TXDMA_OWN);
-}
-
-static bool ftmac100_txdes_excessive_collision(struct ftmac100_txdes *txdes)
-{
- return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_EXSCOL);
-}
-
-static bool ftmac100_txdes_late_collision(struct ftmac100_txdes *txdes)
-{
- return txdes->txdes0 & cpu_to_le32(FTMAC100_TXDES0_TXPKT_LATECOL);
-}
-
-static void ftmac100_txdes_set_end_of_ring(struct ftmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_EDOTR);
-}
-
-static void ftmac100_txdes_set_first_segment(struct ftmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_FTS);
-}
-
-static void ftmac100_txdes_set_last_segment(struct ftmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_LTS);
-}
-
-static void ftmac100_txdes_set_txint(struct ftmac100_txdes *txdes)
-{
- txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXIC);
-}
-
-static void ftmac100_txdes_set_buffer_size(struct ftmac100_txdes *txdes,
- unsigned int len)
-{
- txdes->txdes1 |= cpu_to_le32(FTMAC100_TXDES1_TXBUF_SIZE(len));
-}
-
-static void ftmac100_txdes_set_dma_addr(struct ftmac100_txdes *txdes,
- dma_addr_t addr)
-{
- txdes->txdes2 = cpu_to_le32(addr);
-}
-
-static dma_addr_t ftmac100_txdes_get_dma_addr(struct ftmac100_txdes *txdes)
-{
- return le32_to_cpu(txdes->txdes2);
-}
-
-/*
- * txdes3 is not used by hardware. We use it to keep track of socket buffer.
- * Since hardware does not touch it, we can skip cpu_to_le32()/le32_to_cpu().
- */
-static void ftmac100_txdes_set_skb(struct ftmac100_txdes *txdes, struct sk_buff *skb)
-{
- txdes->txdes3 = (unsigned int)skb;
-}
-
-static struct sk_buff *ftmac100_txdes_get_skb(struct ftmac100_txdes *txdes)
-{
- return (struct sk_buff *)txdes->txdes3;
-}
-
-/******************************************************************************
- * internal functions (transmit)
- *****************************************************************************/
-static int ftmac100_next_tx_pointer(int pointer)
-{
- return (pointer + 1) & (TX_QUEUE_ENTRIES - 1);
-}
-
-static void ftmac100_tx_pointer_advance(struct ftmac100 *priv)
-{
- priv->tx_pointer = ftmac100_next_tx_pointer(priv->tx_pointer);
-}
-
-static void ftmac100_tx_clean_pointer_advance(struct ftmac100 *priv)
-{
- priv->tx_clean_pointer = ftmac100_next_tx_pointer(priv->tx_clean_pointer);
-}
-
-static struct ftmac100_txdes *ftmac100_current_txdes(struct ftmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_pointer];
-}
-
-static struct ftmac100_txdes *ftmac100_current_clean_txdes(struct ftmac100 *priv)
-{
- return &priv->descs->txdes[priv->tx_clean_pointer];
-}
-
-static bool ftmac100_tx_complete_packet(struct ftmac100 *priv)
-{
- struct net_device *netdev = priv->netdev;
- struct ftmac100_txdes *txdes;
- struct sk_buff *skb;
- dma_addr_t map;
-
- if (priv->tx_pending == 0)
- return false;
-
- txdes = ftmac100_current_clean_txdes(priv);
-
- if (ftmac100_txdes_owned_by_dma(txdes))
- return false;
-
- skb = ftmac100_txdes_get_skb(txdes);
- map = ftmac100_txdes_get_dma_addr(txdes);
-
- if (unlikely(ftmac100_txdes_excessive_collision(txdes) ||
- ftmac100_txdes_late_collision(txdes))) {
- /*
- * packet transmitted to ethernet lost due to late collision
- * or excessive collision
- */
- netdev->stats.tx_aborted_errors++;
- } else {
- netdev->stats.tx_packets++;
- netdev->stats.tx_bytes += skb->len;
- }
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
- dev_kfree_skb(skb);
-
- ftmac100_txdes_reset(txdes);
-
- ftmac100_tx_clean_pointer_advance(priv);
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending--;
- spin_unlock(&priv->tx_lock);
- netif_wake_queue(netdev);
-
- return true;
-}
-
-static void ftmac100_tx_complete(struct ftmac100 *priv)
-{
- while (ftmac100_tx_complete_packet(priv))
- ;
-}
-
-static int ftmac100_xmit(struct ftmac100 *priv, struct sk_buff *skb,
- dma_addr_t map)
-{
- struct net_device *netdev = priv->netdev;
- struct ftmac100_txdes *txdes;
- unsigned int len = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
-
- txdes = ftmac100_current_txdes(priv);
- ftmac100_tx_pointer_advance(priv);
-
- /* setup TX descriptor */
- ftmac100_txdes_set_skb(txdes, skb);
- ftmac100_txdes_set_dma_addr(txdes, map);
-
- ftmac100_txdes_set_first_segment(txdes);
- ftmac100_txdes_set_last_segment(txdes);
- ftmac100_txdes_set_txint(txdes);
- ftmac100_txdes_set_buffer_size(txdes, len);
-
- spin_lock(&priv->tx_lock);
- priv->tx_pending++;
- if (priv->tx_pending == TX_QUEUE_ENTRIES)
- netif_stop_queue(netdev);
-
- /* start transmit */
- ftmac100_txdes_set_dma_own(txdes);
- spin_unlock(&priv->tx_lock);
-
- ftmac100_txdma_start_polling(priv);
- return NETDEV_TX_OK;
-}
-
-/******************************************************************************
- * internal functions (buffer)
- *****************************************************************************/
-static int ftmac100_alloc_rx_page(struct ftmac100 *priv,
- struct ftmac100_rxdes *rxdes, gfp_t gfp)
-{
- struct net_device *netdev = priv->netdev;
- struct page *page;
- dma_addr_t map;
-
- page = alloc_page(gfp);
- if (!page) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to allocate rx page\n");
- return -ENOMEM;
- }
-
- map = dma_map_page(priv->dev, page, 0, RX_BUF_SIZE, DMA_FROM_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- if (net_ratelimit())
- netdev_err(netdev, "failed to map rx page\n");
- __free_page(page);
- return -ENOMEM;
- }
-
- ftmac100_rxdes_set_page(rxdes, page);
- ftmac100_rxdes_set_dma_addr(rxdes, map);
- ftmac100_rxdes_set_buffer_size(rxdes, RX_BUF_SIZE);
- ftmac100_rxdes_set_dma_own(rxdes);
- return 0;
-}
-
-static void ftmac100_free_buffers(struct ftmac100 *priv)
-{
- int i;
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
- struct page *page = ftmac100_rxdes_get_page(rxdes);
- dma_addr_t map = ftmac100_rxdes_get_dma_addr(rxdes);
-
- if (!page)
- continue;
-
- dma_unmap_page(priv->dev, map, RX_BUF_SIZE, DMA_FROM_DEVICE);
- __free_page(page);
- }
-
- for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
- struct ftmac100_txdes *txdes = &priv->descs->txdes[i];
- struct sk_buff *skb = ftmac100_txdes_get_skb(txdes);
- dma_addr_t map = ftmac100_txdes_get_dma_addr(txdes);
-
- if (!skb)
- continue;
-
- dma_unmap_single(priv->dev, map, skb_headlen(skb), DMA_TO_DEVICE);
- dev_kfree_skb(skb);
- }
-
- dma_free_coherent(priv->dev, sizeof(struct ftmac100_descs),
- priv->descs, priv->descs_dma_addr);
-}
-
-static int ftmac100_alloc_buffers(struct ftmac100 *priv)
-{
- int i;
-
- priv->descs = dma_alloc_coherent(priv->dev, sizeof(struct ftmac100_descs),
- &priv->descs_dma_addr, GFP_KERNEL);
- if (!priv->descs)
- return -ENOMEM;
-
- memset(priv->descs, 0, sizeof(struct ftmac100_descs));
-
- /* initialize RX ring */
- ftmac100_rxdes_set_end_of_ring(&priv->descs->rxdes[RX_QUEUE_ENTRIES - 1]);
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- struct ftmac100_rxdes *rxdes = &priv->descs->rxdes[i];
-
- if (ftmac100_alloc_rx_page(priv, rxdes, GFP_KERNEL))
- goto err;
- }
-
- /* initialize TX ring */
- ftmac100_txdes_set_end_of_ring(&priv->descs->txdes[TX_QUEUE_ENTRIES - 1]);
- return 0;
-
-err:
- ftmac100_free_buffers(priv);
- return -ENOMEM;
-}
-
-/******************************************************************************
- * struct mii_if_info functions
- *****************************************************************************/
-static int ftmac100_mdio_read(struct net_device *netdev, int phy_id, int reg)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int i;
-
- phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
- FTMAC100_PHYCR_REGAD(reg) |
- FTMAC100_PHYCR_MIIRD;
-
- iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTMAC100_PHYCR_MIIRD) == 0)
- return phycr & FTMAC100_PHYCR_MIIRDATA;
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio read timed out\n");
- return 0;
-}
-
-static void ftmac100_mdio_write(struct net_device *netdev, int phy_id, int reg,
- int data)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- unsigned int phycr;
- int i;
-
- phycr = FTMAC100_PHYCR_PHYAD(phy_id) |
- FTMAC100_PHYCR_REGAD(reg) |
- FTMAC100_PHYCR_MIIWR;
-
- data = FTMAC100_PHYWDATA_MIIWDATA(data);
-
- iowrite32(data, priv->base + FTMAC100_OFFSET_PHYWDATA);
- iowrite32(phycr, priv->base + FTMAC100_OFFSET_PHYCR);
-
- for (i = 0; i < 10; i++) {
- phycr = ioread32(priv->base + FTMAC100_OFFSET_PHYCR);
-
- if ((phycr & FTMAC100_PHYCR_MIIWR) == 0)
- return;
-
- udelay(100);
- }
-
- netdev_err(netdev, "mdio write timed out\n");
-}
-
-/******************************************************************************
- * struct ethtool_ops functions
- *****************************************************************************/
-static void ftmac100_get_drvinfo(struct net_device *netdev,
- struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_NAME);
- strcpy(info->version, DRV_VERSION);
- strcpy(info->bus_info, dev_name(&netdev->dev));
-}
-
-static int ftmac100_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- return mii_ethtool_gset(&priv->mii, cmd);
-}
-
-static int ftmac100_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- return mii_ethtool_sset(&priv->mii, cmd);
-}
-
-static int ftmac100_nway_reset(struct net_device *netdev)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- return mii_nway_restart(&priv->mii);
-}
-
-static u32 ftmac100_get_link(struct net_device *netdev)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- return mii_link_ok(&priv->mii);
-}
-
-static const struct ethtool_ops ftmac100_ethtool_ops = {
- .set_settings = ftmac100_set_settings,
- .get_settings = ftmac100_get_settings,
- .get_drvinfo = ftmac100_get_drvinfo,
- .nway_reset = ftmac100_nway_reset,
- .get_link = ftmac100_get_link,
-};
-
-/******************************************************************************
- * interrupt handler
- *****************************************************************************/
-static irqreturn_t ftmac100_interrupt(int irq, void *dev_id)
-{
- struct net_device *netdev = dev_id;
- struct ftmac100 *priv = netdev_priv(netdev);
-
- if (likely(netif_running(netdev))) {
- /* Disable interrupts for polling */
- ftmac100_disable_all_int(priv);
- napi_schedule(&priv->napi);
- }
-
- return IRQ_HANDLED;
-}
-
-/******************************************************************************
- * struct napi_struct functions
- *****************************************************************************/
-static int ftmac100_poll(struct napi_struct *napi, int budget)
-{
- struct ftmac100 *priv = container_of(napi, struct ftmac100, napi);
- struct net_device *netdev = priv->netdev;
- unsigned int status;
- bool completed = true;
- int rx = 0;
-
- status = ioread32(priv->base + FTMAC100_OFFSET_ISR);
-
- if (status & (FTMAC100_INT_RPKT_FINISH | FTMAC100_INT_NORXBUF)) {
- /*
- * FTMAC100_INT_RPKT_FINISH:
- * RX DMA has received packets into RX buffer successfully
- *
- * FTMAC100_INT_NORXBUF:
- * RX buffer unavailable
- */
- bool retry;
-
- do {
- retry = ftmac100_rx_packet(priv, &rx);
- } while (retry && rx < budget);
-
- if (retry && rx == budget)
- completed = false;
- }
-
- if (status & (FTMAC100_INT_XPKT_OK | FTMAC100_INT_XPKT_LOST)) {
- /*
- * FTMAC100_INT_XPKT_OK:
- * packet transmitted to ethernet successfully
- *
- * FTMAC100_INT_XPKT_LOST:
- * packet transmitted to ethernet lost due to late
- * collision or excessive collision
- */
- ftmac100_tx_complete(priv);
- }
-
- if (status & (FTMAC100_INT_NORXBUF | FTMAC100_INT_RPKT_LOST |
- FTMAC100_INT_AHB_ERR | FTMAC100_INT_PHYSTS_CHG)) {
- if (net_ratelimit())
- netdev_info(netdev, "[ISR] = 0x%x: %s%s%s%s\n", status,
- status & FTMAC100_INT_NORXBUF ? "NORXBUF " : "",
- status & FTMAC100_INT_RPKT_LOST ? "RPKT_LOST " : "",
- status & FTMAC100_INT_AHB_ERR ? "AHB_ERR " : "",
- status & FTMAC100_INT_PHYSTS_CHG ? "PHYSTS_CHG" : "");
-
- if (status & FTMAC100_INT_NORXBUF) {
- /* RX buffer unavailable */
- netdev->stats.rx_over_errors++;
- }
-
- if (status & FTMAC100_INT_RPKT_LOST) {
- /* received packet lost due to RX FIFO full */
- netdev->stats.rx_fifo_errors++;
- }
-
- if (status & FTMAC100_INT_PHYSTS_CHG) {
- /* PHY link status change */
- mii_check_link(&priv->mii);
- }
- }
-
- if (completed) {
- /* stop polling */
- napi_complete(napi);
- ftmac100_enable_all_int(priv);
- }
-
- return rx;
-}
-
-/******************************************************************************
- * struct net_device_ops functions
- *****************************************************************************/
-static int ftmac100_open(struct net_device *netdev)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- int err;
-
- err = ftmac100_alloc_buffers(priv);
- if (err) {
- netdev_err(netdev, "failed to allocate buffers\n");
- goto err_alloc;
- }
-
- err = request_irq(priv->irq, ftmac100_interrupt, 0, netdev->name, netdev);
- if (err) {
- netdev_err(netdev, "failed to request irq %d\n", priv->irq);
- goto err_irq;
- }
-
- priv->rx_pointer = 0;
- priv->tx_clean_pointer = 0;
- priv->tx_pointer = 0;
- priv->tx_pending = 0;
-
- err = ftmac100_start_hw(priv);
- if (err)
- goto err_hw;
-
- napi_enable(&priv->napi);
- netif_start_queue(netdev);
-
- ftmac100_enable_all_int(priv);
-
- return 0;
-
-err_hw:
- free_irq(priv->irq, netdev);
-err_irq:
- ftmac100_free_buffers(priv);
-err_alloc:
- return err;
-}
-
-static int ftmac100_stop(struct net_device *netdev)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
-
- ftmac100_disable_all_int(priv);
- netif_stop_queue(netdev);
- napi_disable(&priv->napi);
- ftmac100_stop_hw(priv);
- free_irq(priv->irq, netdev);
- ftmac100_free_buffers(priv);
-
- return 0;
-}
-
-static int ftmac100_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- dma_addr_t map;
-
- if (unlikely(skb->len > MAX_PKT_SIZE)) {
- if (net_ratelimit())
- netdev_dbg(netdev, "tx packet too big\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
- if (unlikely(dma_mapping_error(priv->dev, map))) {
- /* drop packet */
- if (net_ratelimit())
- netdev_err(netdev, "map socket buffer failed\n");
-
- netdev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- return ftmac100_xmit(priv, skb, map);
-}
-
-/* optional */
-static int ftmac100_do_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
-{
- struct ftmac100 *priv = netdev_priv(netdev);
- struct mii_ioctl_data *data = if_mii(ifr);
-
- return generic_mii_ioctl(&priv->mii, data, cmd, NULL);
-}
-
-static const struct net_device_ops ftmac100_netdev_ops = {
- .ndo_open = ftmac100_open,
- .ndo_stop = ftmac100_stop,
- .ndo_start_xmit = ftmac100_hard_start_xmit,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_do_ioctl = ftmac100_do_ioctl,
-};
-
-/******************************************************************************
- * struct platform_driver functions
- *****************************************************************************/
-static int ftmac100_probe(struct platform_device *pdev)
-{
- struct resource *res;
- int irq;
- struct net_device *netdev;
- struct ftmac100 *priv;
- int err;
-
- if (!pdev)
- return -ENODEV;
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENXIO;
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0)
- return irq;
-
- /* setup net_device */
- netdev = alloc_etherdev(sizeof(*priv));
- if (!netdev) {
- err = -ENOMEM;
- goto err_alloc_etherdev;
- }
-
- SET_NETDEV_DEV(netdev, &pdev->dev);
- SET_ETHTOOL_OPS(netdev, &ftmac100_ethtool_ops);
- netdev->netdev_ops = &ftmac100_netdev_ops;
-
- platform_set_drvdata(pdev, netdev);
-
- /* setup private data */
- priv = netdev_priv(netdev);
- priv->netdev = netdev;
- priv->dev = &pdev->dev;
-
- spin_lock_init(&priv->tx_lock);
-
- /* initialize NAPI */
- netif_napi_add(netdev, &priv->napi, ftmac100_poll, 64);
-
- /* map io memory */
- priv->res = request_mem_region(res->start, resource_size(res),
- dev_name(&pdev->dev));
- if (!priv->res) {
- dev_err(&pdev->dev, "Could not reserve memory region\n");
- err = -ENOMEM;
- goto err_req_mem;
- }
-
- priv->base = ioremap(res->start, resource_size(res));
- if (!priv->base) {
- dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
- err = -EIO;
- goto err_ioremap;
- }
-
- priv->irq = irq;
-
- /* initialize struct mii_if_info */
- priv->mii.phy_id = 0;
- priv->mii.phy_id_mask = 0x1f;
- priv->mii.reg_num_mask = 0x1f;
- priv->mii.dev = netdev;
- priv->mii.mdio_read = ftmac100_mdio_read;
- priv->mii.mdio_write = ftmac100_mdio_write;
-
- /* register network device */
- err = register_netdev(netdev);
- if (err) {
- dev_err(&pdev->dev, "Failed to register netdev\n");
- goto err_register_netdev;
- }
-
- netdev_info(netdev, "irq %d, mapped at %p\n", priv->irq, priv->base);
-
- if (!is_valid_ether_addr(netdev->dev_addr)) {
- random_ether_addr(netdev->dev_addr);
- netdev_info(netdev, "generated random MAC address %pM\n",
- netdev->dev_addr);
- }
-
- return 0;
-
-err_register_netdev:
- iounmap(priv->base);
-err_ioremap:
- release_resource(priv->res);
-err_req_mem:
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
-err_alloc_etherdev:
- return err;
-}
-
-static int __exit ftmac100_remove(struct platform_device *pdev)
-{
- struct net_device *netdev;
- struct ftmac100 *priv;
-
- netdev = platform_get_drvdata(pdev);
- priv = netdev_priv(netdev);
-
- unregister_netdev(netdev);
-
- iounmap(priv->base);
- release_resource(priv->res);
-
- netif_napi_del(&priv->napi);
- platform_set_drvdata(pdev, NULL);
- free_netdev(netdev);
- return 0;
-}
-
-static struct platform_driver ftmac100_driver = {
- .probe = ftmac100_probe,
- .remove = __exit_p(ftmac100_remove),
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-/******************************************************************************
- * initialization / finalization
- *****************************************************************************/
-static int __init ftmac100_init(void)
-{
- pr_info("Loading version " DRV_VERSION " ...\n");
- return platform_driver_register(&ftmac100_driver);
-}
-
-static void __exit ftmac100_exit(void)
-{
- platform_driver_unregister(&ftmac100_driver);
-}
-
-module_init(ftmac100_init);
-module_exit(ftmac100_exit);
-
-MODULE_AUTHOR("Po-Yu Chuang <ratbert@faraday-tech.com>");
-MODULE_DESCRIPTION("FTMAC100 driver");
-MODULE_LICENSE("GPL");
+++ /dev/null
-/*
- * Faraday FTMAC100 10/100 Ethernet
- *
- * (C) Copyright 2009-2011 Faraday Technology
- * Po-Yu Chuang <ratbert@faraday-tech.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __FTMAC100_H
-#define __FTMAC100_H
-
-#define FTMAC100_OFFSET_ISR 0x00
-#define FTMAC100_OFFSET_IMR 0x04
-#define FTMAC100_OFFSET_MAC_MADR 0x08
-#define FTMAC100_OFFSET_MAC_LADR 0x0c
-#define FTMAC100_OFFSET_MAHT0 0x10
-#define FTMAC100_OFFSET_MAHT1 0x14
-#define FTMAC100_OFFSET_TXPD 0x18
-#define FTMAC100_OFFSET_RXPD 0x1c
-#define FTMAC100_OFFSET_TXR_BADR 0x20
-#define FTMAC100_OFFSET_RXR_BADR 0x24
-#define FTMAC100_OFFSET_ITC 0x28
-#define FTMAC100_OFFSET_APTC 0x2c
-#define FTMAC100_OFFSET_DBLAC 0x30
-#define FTMAC100_OFFSET_MACCR 0x88
-#define FTMAC100_OFFSET_MACSR 0x8c
-#define FTMAC100_OFFSET_PHYCR 0x90
-#define FTMAC100_OFFSET_PHYWDATA 0x94
-#define FTMAC100_OFFSET_FCR 0x98
-#define FTMAC100_OFFSET_BPR 0x9c
-#define FTMAC100_OFFSET_TS 0xc4
-#define FTMAC100_OFFSET_DMAFIFOS 0xc8
-#define FTMAC100_OFFSET_TM 0xcc
-#define FTMAC100_OFFSET_TX_MCOL_SCOL 0xd4
-#define FTMAC100_OFFSET_RPF_AEP 0xd8
-#define FTMAC100_OFFSET_XM_PG 0xdc
-#define FTMAC100_OFFSET_RUNT_TLCC 0xe0
-#define FTMAC100_OFFSET_CRCER_FTL 0xe4
-#define FTMAC100_OFFSET_RLC_RCC 0xe8
-#define FTMAC100_OFFSET_BROC 0xec
-#define FTMAC100_OFFSET_MULCA 0xf0
-#define FTMAC100_OFFSET_RP 0xf4
-#define FTMAC100_OFFSET_XP 0xf8
-
-/*
- * Interrupt status register & interrupt mask register
- */
-#define FTMAC100_INT_RPKT_FINISH (1 << 0)
-#define FTMAC100_INT_NORXBUF (1 << 1)
-#define FTMAC100_INT_XPKT_FINISH (1 << 2)
-#define FTMAC100_INT_NOTXBUF (1 << 3)
-#define FTMAC100_INT_XPKT_OK (1 << 4)
-#define FTMAC100_INT_XPKT_LOST (1 << 5)
-#define FTMAC100_INT_RPKT_SAV (1 << 6)
-#define FTMAC100_INT_RPKT_LOST (1 << 7)
-#define FTMAC100_INT_AHB_ERR (1 << 8)
-#define FTMAC100_INT_PHYSTS_CHG (1 << 9)
-
-/*
- * Interrupt timer control register
- */
-#define FTMAC100_ITC_RXINT_CNT(x) (((x) & 0xf) << 0)
-#define FTMAC100_ITC_RXINT_THR(x) (((x) & 0x7) << 4)
-#define FTMAC100_ITC_RXINT_TIME_SEL (1 << 7)
-#define FTMAC100_ITC_TXINT_CNT(x) (((x) & 0xf) << 8)
-#define FTMAC100_ITC_TXINT_THR(x) (((x) & 0x7) << 12)
-#define FTMAC100_ITC_TXINT_TIME_SEL (1 << 15)
-
-/*
- * Automatic polling timer control register
- */
-#define FTMAC100_APTC_RXPOLL_CNT(x) (((x) & 0xf) << 0)
-#define FTMAC100_APTC_RXPOLL_TIME_SEL (1 << 4)
-#define FTMAC100_APTC_TXPOLL_CNT(x) (((x) & 0xf) << 8)
-#define FTMAC100_APTC_TXPOLL_TIME_SEL (1 << 12)
-
-/*
- * DMA burst length and arbitration control register
- */
-#define FTMAC100_DBLAC_INCR4_EN (1 << 0)
-#define FTMAC100_DBLAC_INCR8_EN (1 << 1)
-#define FTMAC100_DBLAC_INCR16_EN (1 << 2)
-#define FTMAC100_DBLAC_RXFIFO_LTHR(x) (((x) & 0x7) << 3)
-#define FTMAC100_DBLAC_RXFIFO_HTHR(x) (((x) & 0x7) << 6)
-#define FTMAC100_DBLAC_RX_THR_EN (1 << 9)
-
-/*
- * MAC control register
- */
-#define FTMAC100_MACCR_XDMA_EN (1 << 0)
-#define FTMAC100_MACCR_RDMA_EN (1 << 1)
-#define FTMAC100_MACCR_SW_RST (1 << 2)
-#define FTMAC100_MACCR_LOOP_EN (1 << 3)
-#define FTMAC100_MACCR_CRC_DIS (1 << 4)
-#define FTMAC100_MACCR_XMT_EN (1 << 5)
-#define FTMAC100_MACCR_ENRX_IN_HALFTX (1 << 6)
-#define FTMAC100_MACCR_RCV_EN (1 << 8)
-#define FTMAC100_MACCR_HT_MULTI_EN (1 << 9)
-#define FTMAC100_MACCR_RX_RUNT (1 << 10)
-#define FTMAC100_MACCR_RX_FTL (1 << 11)
-#define FTMAC100_MACCR_RCV_ALL (1 << 12)
-#define FTMAC100_MACCR_CRC_APD (1 << 14)
-#define FTMAC100_MACCR_FULLDUP (1 << 15)
-#define FTMAC100_MACCR_RX_MULTIPKT (1 << 16)
-#define FTMAC100_MACCR_RX_BROADPKT (1 << 17)
-
-/*
- * PHY control register
- */
-#define FTMAC100_PHYCR_MIIRDATA 0xffff
-#define FTMAC100_PHYCR_PHYAD(x) (((x) & 0x1f) << 16)
-#define FTMAC100_PHYCR_REGAD(x) (((x) & 0x1f) << 21)
-#define FTMAC100_PHYCR_MIIRD (1 << 26)
-#define FTMAC100_PHYCR_MIIWR (1 << 27)
-
-/*
- * PHY write data register
- */
-#define FTMAC100_PHYWDATA_MIIWDATA(x) ((x) & 0xffff)
-
-/*
- * Transmit descriptor, aligned to 16 bytes
- */
-struct ftmac100_txdes {
- unsigned int txdes0;
- unsigned int txdes1;
- unsigned int txdes2; /* TXBUF_BADR */
- unsigned int txdes3; /* not used by HW */
-} __attribute__ ((aligned(16)));
-
-#define FTMAC100_TXDES0_TXPKT_LATECOL (1 << 0)
-#define FTMAC100_TXDES0_TXPKT_EXSCOL (1 << 1)
-#define FTMAC100_TXDES0_TXDMA_OWN (1 << 31)
-
-#define FTMAC100_TXDES1_TXBUF_SIZE(x) ((x) & 0x7ff)
-#define FTMAC100_TXDES1_LTS (1 << 27)
-#define FTMAC100_TXDES1_FTS (1 << 28)
-#define FTMAC100_TXDES1_TX2FIC (1 << 29)
-#define FTMAC100_TXDES1_TXIC (1 << 30)
-#define FTMAC100_TXDES1_EDOTR (1 << 31)
-
-/*
- * Receive descriptor, aligned to 16 bytes
- */
-struct ftmac100_rxdes {
- unsigned int rxdes0;
- unsigned int rxdes1;
- unsigned int rxdes2; /* RXBUF_BADR */
- unsigned int rxdes3; /* not used by HW */
-} __attribute__ ((aligned(16)));
-
-#define FTMAC100_RXDES0_RFL 0x7ff
-#define FTMAC100_RXDES0_MULTICAST (1 << 16)
-#define FTMAC100_RXDES0_BROADCAST (1 << 17)
-#define FTMAC100_RXDES0_RX_ERR (1 << 18)
-#define FTMAC100_RXDES0_CRC_ERR (1 << 19)
-#define FTMAC100_RXDES0_FTL (1 << 20)
-#define FTMAC100_RXDES0_RUNT (1 << 21)
-#define FTMAC100_RXDES0_RX_ODD_NB (1 << 22)
-#define FTMAC100_RXDES0_LRS (1 << 28)
-#define FTMAC100_RXDES0_FRS (1 << 29)
-#define FTMAC100_RXDES0_RXDMA_OWN (1 << 31)
-
-#define FTMAC100_RXDES1_RXBUF_SIZE(x) ((x) & 0x7ff)
-#define FTMAC100_RXDES1_EDORR (1 << 31)
-
-#endif /* __FTMAC100_H */
projects / openwrt / staging / blogic.git / commitdiff