M: Hartley Sweeten <hsweeten@visionengravers.com>
L: netdev@vger.kernel.org
S: Maintained
-F: drivers/net/arm/ep93xx_eth.c
+F: drivers/net/ethernet/cirrus/ep93xx_eth.c
CIRRUS LOGIC EP93XX OHCI USB HOST DRIVER
M: Lennert Buytenhek <kernel@wantstofly.org>
If you wish to compile a kernel for the AT91RM9200 and enable
ethernet support, then you should always answer Y to this.
-config EP93XX_ETH
- tristate "EP93xx Ethernet support"
- depends on ARM && ARCH_EP93XX
- select MII
- help
- This is a driver for the ethernet hardware included in EP93xx CPUs.
- Say Y if you are building a kernel for EP93xx based devices.
-
config W90P910_ETH
tristate "Nuvoton w90p910 Ethernet support"
depends on ARM && ARCH_W90X900
#
obj-$(CONFIG_ARM_AT91_ETHER) += at91_ether.o
-obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o
obj-$(CONFIG_W90P910_ETH) += w90p910_ether.o
+++ /dev/null
-/*
- * EP93xx ethernet network device driver
- * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
- * Dedicated to Marija Kulikova.
- *
- * 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.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
-
-#include <linux/dma-mapping.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/netdevice.h>
-#include <linux/mii.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <mach/hardware.h>
-
-#define DRV_MODULE_NAME "ep93xx-eth"
-#define DRV_MODULE_VERSION "0.1"
-
-#define RX_QUEUE_ENTRIES 64
-#define TX_QUEUE_ENTRIES 8
-
-#define MAX_PKT_SIZE 2044
-#define PKT_BUF_SIZE 2048
-
-#define REG_RXCTL 0x0000
-#define REG_RXCTL_DEFAULT 0x00073800
-#define REG_TXCTL 0x0004
-#define REG_TXCTL_ENABLE 0x00000001
-#define REG_MIICMD 0x0010
-#define REG_MIICMD_READ 0x00008000
-#define REG_MIICMD_WRITE 0x00004000
-#define REG_MIIDATA 0x0014
-#define REG_MIISTS 0x0018
-#define REG_MIISTS_BUSY 0x00000001
-#define REG_SELFCTL 0x0020
-#define REG_SELFCTL_RESET 0x00000001
-#define REG_INTEN 0x0024
-#define REG_INTEN_TX 0x00000008
-#define REG_INTEN_RX 0x00000007
-#define REG_INTSTSP 0x0028
-#define REG_INTSTS_TX 0x00000008
-#define REG_INTSTS_RX 0x00000004
-#define REG_INTSTSC 0x002c
-#define REG_AFP 0x004c
-#define REG_INDAD0 0x0050
-#define REG_INDAD1 0x0051
-#define REG_INDAD2 0x0052
-#define REG_INDAD3 0x0053
-#define REG_INDAD4 0x0054
-#define REG_INDAD5 0x0055
-#define REG_GIINTMSK 0x0064
-#define REG_GIINTMSK_ENABLE 0x00008000
-#define REG_BMCTL 0x0080
-#define REG_BMCTL_ENABLE_TX 0x00000100
-#define REG_BMCTL_ENABLE_RX 0x00000001
-#define REG_BMSTS 0x0084
-#define REG_BMSTS_RX_ACTIVE 0x00000008
-#define REG_RXDQBADD 0x0090
-#define REG_RXDQBLEN 0x0094
-#define REG_RXDCURADD 0x0098
-#define REG_RXDENQ 0x009c
-#define REG_RXSTSQBADD 0x00a0
-#define REG_RXSTSQBLEN 0x00a4
-#define REG_RXSTSQCURADD 0x00a8
-#define REG_RXSTSENQ 0x00ac
-#define REG_TXDQBADD 0x00b0
-#define REG_TXDQBLEN 0x00b4
-#define REG_TXDQCURADD 0x00b8
-#define REG_TXDENQ 0x00bc
-#define REG_TXSTSQBADD 0x00c0
-#define REG_TXSTSQBLEN 0x00c4
-#define REG_TXSTSQCURADD 0x00c8
-#define REG_MAXFRMLEN 0x00e8
-
-struct ep93xx_rdesc
-{
- u32 buf_addr;
- u32 rdesc1;
-};
-
-#define RDESC1_NSOF 0x80000000
-#define RDESC1_BUFFER_INDEX 0x7fff0000
-#define RDESC1_BUFFER_LENGTH 0x0000ffff
-
-struct ep93xx_rstat
-{
- u32 rstat0;
- u32 rstat1;
-};
-
-#define RSTAT0_RFP 0x80000000
-#define RSTAT0_RWE 0x40000000
-#define RSTAT0_EOF 0x20000000
-#define RSTAT0_EOB 0x10000000
-#define RSTAT0_AM 0x00c00000
-#define RSTAT0_RX_ERR 0x00200000
-#define RSTAT0_OE 0x00100000
-#define RSTAT0_FE 0x00080000
-#define RSTAT0_RUNT 0x00040000
-#define RSTAT0_EDATA 0x00020000
-#define RSTAT0_CRCE 0x00010000
-#define RSTAT0_CRCI 0x00008000
-#define RSTAT0_HTI 0x00003f00
-#define RSTAT1_RFP 0x80000000
-#define RSTAT1_BUFFER_INDEX 0x7fff0000
-#define RSTAT1_FRAME_LENGTH 0x0000ffff
-
-struct ep93xx_tdesc
-{
- u32 buf_addr;
- u32 tdesc1;
-};
-
-#define TDESC1_EOF 0x80000000
-#define TDESC1_BUFFER_INDEX 0x7fff0000
-#define TDESC1_BUFFER_ABORT 0x00008000
-#define TDESC1_BUFFER_LENGTH 0x00000fff
-
-struct ep93xx_tstat
-{
- u32 tstat0;
-};
-
-#define TSTAT0_TXFP 0x80000000
-#define TSTAT0_TXWE 0x40000000
-#define TSTAT0_FA 0x20000000
-#define TSTAT0_LCRS 0x10000000
-#define TSTAT0_OW 0x04000000
-#define TSTAT0_TXU 0x02000000
-#define TSTAT0_ECOLL 0x01000000
-#define TSTAT0_NCOLL 0x001f0000
-#define TSTAT0_BUFFER_INDEX 0x00007fff
-
-struct ep93xx_descs
-{
- struct ep93xx_rdesc rdesc[RX_QUEUE_ENTRIES];
- struct ep93xx_tdesc tdesc[TX_QUEUE_ENTRIES];
- struct ep93xx_rstat rstat[RX_QUEUE_ENTRIES];
- struct ep93xx_tstat tstat[TX_QUEUE_ENTRIES];
-};
-
-struct ep93xx_priv
-{
- struct resource *res;
- void __iomem *base_addr;
- int irq;
-
- struct ep93xx_descs *descs;
- dma_addr_t descs_dma_addr;
-
- void *rx_buf[RX_QUEUE_ENTRIES];
- void *tx_buf[TX_QUEUE_ENTRIES];
-
- spinlock_t rx_lock;
- unsigned int rx_pointer;
- unsigned int tx_clean_pointer;
- unsigned int tx_pointer;
- spinlock_t tx_pending_lock;
- unsigned int tx_pending;
-
- struct net_device *dev;
- struct napi_struct napi;
-
- struct mii_if_info mii;
- u8 mdc_divisor;
-};
-
-#define rdb(ep, off) __raw_readb((ep)->base_addr + (off))
-#define rdw(ep, off) __raw_readw((ep)->base_addr + (off))
-#define rdl(ep, off) __raw_readl((ep)->base_addr + (off))
-#define wrb(ep, off, val) __raw_writeb((val), (ep)->base_addr + (off))
-#define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
-#define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))
-
-static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int data;
- int i;
-
- wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
-
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10) {
- pr_info("mdio read timed out\n");
- data = 0xffff;
- } else {
- data = rdl(ep, REG_MIIDATA);
- }
-
- return data;
-}
-
-static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int i;
-
- wrl(ep, REG_MIIDATA, data);
- wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
-
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10)
- pr_info("mdio write timed out\n");
-}
-
-static int ep93xx_rx(struct net_device *dev, int processed, int budget)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
-
- while (processed < budget) {
- int entry;
- struct ep93xx_rstat *rstat;
- u32 rstat0;
- u32 rstat1;
- int length;
- struct sk_buff *skb;
-
- entry = ep->rx_pointer;
- rstat = ep->descs->rstat + entry;
-
- rstat0 = rstat->rstat0;
- rstat1 = rstat->rstat1;
- if (!(rstat0 & RSTAT0_RFP) || !(rstat1 & RSTAT1_RFP))
- break;
-
- rstat->rstat0 = 0;
- rstat->rstat1 = 0;
-
- if (!(rstat0 & RSTAT0_EOF))
- pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
- if (!(rstat0 & RSTAT0_EOB))
- pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
- if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
- pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
-
- if (!(rstat0 & RSTAT0_RWE)) {
- dev->stats.rx_errors++;
- if (rstat0 & RSTAT0_OE)
- dev->stats.rx_fifo_errors++;
- if (rstat0 & RSTAT0_FE)
- dev->stats.rx_frame_errors++;
- if (rstat0 & (RSTAT0_RUNT | RSTAT0_EDATA))
- dev->stats.rx_length_errors++;
- if (rstat0 & RSTAT0_CRCE)
- dev->stats.rx_crc_errors++;
- goto err;
- }
-
- length = rstat1 & RSTAT1_FRAME_LENGTH;
- if (length > MAX_PKT_SIZE) {
- pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
- goto err;
- }
-
- /* Strip FCS. */
- if (rstat0 & RSTAT0_CRCI)
- length -= 4;
-
- skb = dev_alloc_skb(length + 2);
- if (likely(skb != NULL)) {
- struct ep93xx_rdesc *rxd = &ep->descs->rdesc[entry];
- skb_reserve(skb, 2);
- dma_sync_single_for_cpu(dev->dev.parent, rxd->buf_addr,
- length, DMA_FROM_DEVICE);
- skb_copy_to_linear_data(skb, ep->rx_buf[entry], length);
- dma_sync_single_for_device(dev->dev.parent,
- rxd->buf_addr, length,
- DMA_FROM_DEVICE);
- skb_put(skb, length);
- skb->protocol = eth_type_trans(skb, dev);
-
- netif_receive_skb(skb);
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += length;
- } else {
- dev->stats.rx_dropped++;
- }
-
-err:
- ep->rx_pointer = (entry + 1) & (RX_QUEUE_ENTRIES - 1);
- processed++;
- }
-
- return processed;
-}
-
-static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
-{
- struct ep93xx_rstat *rstat = ep->descs->rstat + ep->rx_pointer;
- return !!((rstat->rstat0 & RSTAT0_RFP) && (rstat->rstat1 & RSTAT1_RFP));
-}
-
-static int ep93xx_poll(struct napi_struct *napi, int budget)
-{
- struct ep93xx_priv *ep = container_of(napi, struct ep93xx_priv, napi);
- struct net_device *dev = ep->dev;
- int rx = 0;
-
-poll_some_more:
- rx = ep93xx_rx(dev, rx, budget);
- if (rx < budget) {
- int more = 0;
-
- spin_lock_irq(&ep->rx_lock);
- __napi_complete(napi);
- wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
- if (ep93xx_have_more_rx(ep)) {
- wrl(ep, REG_INTEN, REG_INTEN_TX);
- wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
- more = 1;
- }
- spin_unlock_irq(&ep->rx_lock);
-
- if (more && napi_reschedule(napi))
- goto poll_some_more;
- }
-
- if (rx) {
- wrw(ep, REG_RXDENQ, rx);
- wrw(ep, REG_RXSTSENQ, rx);
- }
-
- return rx;
-}
-
-static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- struct ep93xx_tdesc *txd;
- int entry;
-
- if (unlikely(skb->len > MAX_PKT_SIZE)) {
- dev->stats.tx_dropped++;
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- entry = ep->tx_pointer;
- ep->tx_pointer = (ep->tx_pointer + 1) & (TX_QUEUE_ENTRIES - 1);
-
- txd = &ep->descs->tdesc[entry];
-
- txd->tdesc1 = TDESC1_EOF | (entry << 16) | (skb->len & 0xfff);
- dma_sync_single_for_cpu(dev->dev.parent, txd->buf_addr, skb->len,
- DMA_TO_DEVICE);
- skb_copy_and_csum_dev(skb, ep->tx_buf[entry]);
- dma_sync_single_for_device(dev->dev.parent, txd->buf_addr, skb->len,
- DMA_TO_DEVICE);
- dev_kfree_skb(skb);
-
- spin_lock_irq(&ep->tx_pending_lock);
- ep->tx_pending++;
- if (ep->tx_pending == TX_QUEUE_ENTRIES)
- netif_stop_queue(dev);
- spin_unlock_irq(&ep->tx_pending_lock);
-
- wrl(ep, REG_TXDENQ, 1);
-
- return NETDEV_TX_OK;
-}
-
-static void ep93xx_tx_complete(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int wake;
-
- wake = 0;
-
- spin_lock(&ep->tx_pending_lock);
- while (1) {
- int entry;
- struct ep93xx_tstat *tstat;
- u32 tstat0;
-
- entry = ep->tx_clean_pointer;
- tstat = ep->descs->tstat + entry;
-
- tstat0 = tstat->tstat0;
- if (!(tstat0 & TSTAT0_TXFP))
- break;
-
- tstat->tstat0 = 0;
-
- if (tstat0 & TSTAT0_FA)
- pr_crit("frame aborted %.8x\n", tstat0);
- if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
- pr_crit("entry mismatch %.8x\n", tstat0);
-
- if (tstat0 & TSTAT0_TXWE) {
- int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
-
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += length;
- } else {
- dev->stats.tx_errors++;
- }
-
- if (tstat0 & TSTAT0_OW)
- dev->stats.tx_window_errors++;
- if (tstat0 & TSTAT0_TXU)
- dev->stats.tx_fifo_errors++;
- dev->stats.collisions += (tstat0 >> 16) & 0x1f;
-
- ep->tx_clean_pointer = (entry + 1) & (TX_QUEUE_ENTRIES - 1);
- if (ep->tx_pending == TX_QUEUE_ENTRIES)
- wake = 1;
- ep->tx_pending--;
- }
- spin_unlock(&ep->tx_pending_lock);
-
- if (wake)
- netif_wake_queue(dev);
-}
-
-static irqreturn_t ep93xx_irq(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct ep93xx_priv *ep = netdev_priv(dev);
- u32 status;
-
- status = rdl(ep, REG_INTSTSC);
- if (status == 0)
- return IRQ_NONE;
-
- if (status & REG_INTSTS_RX) {
- spin_lock(&ep->rx_lock);
- if (likely(napi_schedule_prep(&ep->napi))) {
- wrl(ep, REG_INTEN, REG_INTEN_TX);
- __napi_schedule(&ep->napi);
- }
- spin_unlock(&ep->rx_lock);
- }
-
- if (status & REG_INTSTS_TX)
- ep93xx_tx_complete(dev);
-
- return IRQ_HANDLED;
-}
-
-static void ep93xx_free_buffers(struct ep93xx_priv *ep)
-{
- struct device *dev = ep->dev->dev.parent;
- int i;
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- dma_addr_t d;
-
- d = ep->descs->rdesc[i].buf_addr;
- if (d)
- dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_FROM_DEVICE);
-
- if (ep->rx_buf[i] != NULL)
- kfree(ep->rx_buf[i]);
- }
-
- for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
- dma_addr_t d;
-
- d = ep->descs->tdesc[i].buf_addr;
- if (d)
- dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_TO_DEVICE);
-
- if (ep->tx_buf[i] != NULL)
- kfree(ep->tx_buf[i]);
- }
-
- dma_free_coherent(dev, sizeof(struct ep93xx_descs), ep->descs,
- ep->descs_dma_addr);
-}
-
-static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
-{
- struct device *dev = ep->dev->dev.parent;
- int i;
-
- ep->descs = dma_alloc_coherent(dev, sizeof(struct ep93xx_descs),
- &ep->descs_dma_addr, GFP_KERNEL);
- if (ep->descs == NULL)
- return 1;
-
- for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
- void *buf;
- dma_addr_t d;
-
- buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
- if (buf == NULL)
- goto err;
-
- d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_FROM_DEVICE);
- if (dma_mapping_error(dev, d)) {
- kfree(buf);
- goto err;
- }
-
- ep->rx_buf[i] = buf;
- ep->descs->rdesc[i].buf_addr = d;
- ep->descs->rdesc[i].rdesc1 = (i << 16) | PKT_BUF_SIZE;
- }
-
- for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
- void *buf;
- dma_addr_t d;
-
- buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
- if (buf == NULL)
- goto err;
-
- d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_TO_DEVICE);
- if (dma_mapping_error(dev, d)) {
- kfree(buf);
- goto err;
- }
-
- ep->tx_buf[i] = buf;
- ep->descs->tdesc[i].buf_addr = d;
- }
-
- return 0;
-
-err:
- ep93xx_free_buffers(ep);
- return 1;
-}
-
-static int ep93xx_start_hw(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- unsigned long addr;
- int i;
-
- wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10) {
- pr_crit("hw failed to reset\n");
- return 1;
- }
-
- wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9));
-
- /* Does the PHY support preamble suppress? */
- if ((ep93xx_mdio_read(dev, ep->mii.phy_id, MII_BMSR) & 0x0040) != 0)
- wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9) | (1 << 8));
-
- /* Receive descriptor ring. */
- addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
- wrl(ep, REG_RXDQBADD, addr);
- wrl(ep, REG_RXDCURADD, addr);
- wrw(ep, REG_RXDQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rdesc));
-
- /* Receive status ring. */
- addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rstat);
- wrl(ep, REG_RXSTSQBADD, addr);
- wrl(ep, REG_RXSTSQCURADD, addr);
- wrw(ep, REG_RXSTSQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rstat));
-
- /* Transmit descriptor ring. */
- addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tdesc);
- wrl(ep, REG_TXDQBADD, addr);
- wrl(ep, REG_TXDQCURADD, addr);
- wrw(ep, REG_TXDQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tdesc));
-
- /* Transmit status ring. */
- addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tstat);
- wrl(ep, REG_TXSTSQBADD, addr);
- wrl(ep, REG_TXSTSQCURADD, addr);
- wrw(ep, REG_TXSTSQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tstat));
-
- wrl(ep, REG_BMCTL, REG_BMCTL_ENABLE_TX | REG_BMCTL_ENABLE_RX);
- wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
- wrl(ep, REG_GIINTMSK, 0);
-
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_BMSTS) & REG_BMSTS_RX_ACTIVE) != 0)
- break;
- msleep(1);
- }
-
- if (i == 10) {
- pr_crit("hw failed to start\n");
- return 1;
- }
-
- wrl(ep, REG_RXDENQ, RX_QUEUE_ENTRIES);
- wrl(ep, REG_RXSTSENQ, RX_QUEUE_ENTRIES);
-
- wrb(ep, REG_INDAD0, dev->dev_addr[0]);
- wrb(ep, REG_INDAD1, dev->dev_addr[1]);
- wrb(ep, REG_INDAD2, dev->dev_addr[2]);
- wrb(ep, REG_INDAD3, dev->dev_addr[3]);
- wrb(ep, REG_INDAD4, dev->dev_addr[4]);
- wrb(ep, REG_INDAD5, dev->dev_addr[5]);
- wrl(ep, REG_AFP, 0);
-
- wrl(ep, REG_MAXFRMLEN, (MAX_PKT_SIZE << 16) | MAX_PKT_SIZE);
-
- wrl(ep, REG_RXCTL, REG_RXCTL_DEFAULT);
- wrl(ep, REG_TXCTL, REG_TXCTL_ENABLE);
-
- return 0;
-}
-
-static void ep93xx_stop_hw(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int i;
-
- wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
- for (i = 0; i < 10; i++) {
- if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
- break;
- msleep(1);
- }
-
- if (i == 10)
- pr_crit("hw failed to reset\n");
-}
-
-static int ep93xx_open(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- int err;
-
- if (ep93xx_alloc_buffers(ep))
- return -ENOMEM;
-
- napi_enable(&ep->napi);
-
- if (ep93xx_start_hw(dev)) {
- napi_disable(&ep->napi);
- ep93xx_free_buffers(ep);
- return -EIO;
- }
-
- spin_lock_init(&ep->rx_lock);
- ep->rx_pointer = 0;
- ep->tx_clean_pointer = 0;
- ep->tx_pointer = 0;
- spin_lock_init(&ep->tx_pending_lock);
- ep->tx_pending = 0;
-
- err = request_irq(ep->irq, ep93xx_irq, IRQF_SHARED, dev->name, dev);
- if (err) {
- napi_disable(&ep->napi);
- ep93xx_stop_hw(dev);
- ep93xx_free_buffers(ep);
- return err;
- }
-
- wrl(ep, REG_GIINTMSK, REG_GIINTMSK_ENABLE);
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int ep93xx_close(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
-
- napi_disable(&ep->napi);
- netif_stop_queue(dev);
-
- wrl(ep, REG_GIINTMSK, 0);
- free_irq(ep->irq, dev);
- ep93xx_stop_hw(dev);
- ep93xx_free_buffers(ep);
-
- return 0;
-}
-
-static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- struct mii_ioctl_data *data = if_mii(ifr);
-
- return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
-}
-
-static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
-{
- strcpy(info->driver, DRV_MODULE_NAME);
- strcpy(info->version, DRV_MODULE_VERSION);
-}
-
-static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- return mii_ethtool_gset(&ep->mii, cmd);
-}
-
-static int ep93xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- return mii_ethtool_sset(&ep->mii, cmd);
-}
-
-static int ep93xx_nway_reset(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- return mii_nway_restart(&ep->mii);
-}
-
-static u32 ep93xx_get_link(struct net_device *dev)
-{
- struct ep93xx_priv *ep = netdev_priv(dev);
- return mii_link_ok(&ep->mii);
-}
-
-static const struct ethtool_ops ep93xx_ethtool_ops = {
- .get_drvinfo = ep93xx_get_drvinfo,
- .get_settings = ep93xx_get_settings,
- .set_settings = ep93xx_set_settings,
- .nway_reset = ep93xx_nway_reset,
- .get_link = ep93xx_get_link,
-};
-
-static const struct net_device_ops ep93xx_netdev_ops = {
- .ndo_open = ep93xx_open,
- .ndo_stop = ep93xx_close,
- .ndo_start_xmit = ep93xx_xmit,
- .ndo_do_ioctl = ep93xx_ioctl,
- .ndo_validate_addr = eth_validate_addr,
- .ndo_change_mtu = eth_change_mtu,
- .ndo_set_mac_address = eth_mac_addr,
-};
-
-static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
-{
- struct net_device *dev;
-
- dev = alloc_etherdev(sizeof(struct ep93xx_priv));
- if (dev == NULL)
- return NULL;
-
- memcpy(dev->dev_addr, data->dev_addr, ETH_ALEN);
-
- dev->ethtool_ops = &ep93xx_ethtool_ops;
- dev->netdev_ops = &ep93xx_netdev_ops;
-
- dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
-
- return dev;
-}
-
-
-static int ep93xx_eth_remove(struct platform_device *pdev)
-{
- struct net_device *dev;
- struct ep93xx_priv *ep;
-
- dev = platform_get_drvdata(pdev);
- if (dev == NULL)
- return 0;
- platform_set_drvdata(pdev, NULL);
-
- ep = netdev_priv(dev);
-
- /* @@@ Force down. */
- unregister_netdev(dev);
- ep93xx_free_buffers(ep);
-
- if (ep->base_addr != NULL)
- iounmap(ep->base_addr);
-
- if (ep->res != NULL) {
- release_resource(ep->res);
- kfree(ep->res);
- }
-
- free_netdev(dev);
-
- return 0;
-}
-
-static int ep93xx_eth_probe(struct platform_device *pdev)
-{
- struct ep93xx_eth_data *data;
- struct net_device *dev;
- struct ep93xx_priv *ep;
- struct resource *mem;
- int irq;
- int err;
-
- if (pdev == NULL)
- return -ENODEV;
- data = pdev->dev.platform_data;
-
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irq = platform_get_irq(pdev, 0);
- if (!mem || irq < 0)
- return -ENXIO;
-
- dev = ep93xx_dev_alloc(data);
- if (dev == NULL) {
- err = -ENOMEM;
- goto err_out;
- }
- ep = netdev_priv(dev);
- ep->dev = dev;
- SET_NETDEV_DEV(dev, &pdev->dev);
- netif_napi_add(dev, &ep->napi, ep93xx_poll, 64);
-
- platform_set_drvdata(pdev, dev);
-
- ep->res = request_mem_region(mem->start, resource_size(mem),
- dev_name(&pdev->dev));
- if (ep->res == NULL) {
- dev_err(&pdev->dev, "Could not reserve memory region\n");
- err = -ENOMEM;
- goto err_out;
- }
-
- ep->base_addr = ioremap(mem->start, resource_size(mem));
- if (ep->base_addr == NULL) {
- dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
- err = -EIO;
- goto err_out;
- }
- ep->irq = irq;
-
- ep->mii.phy_id = data->phy_id;
- ep->mii.phy_id_mask = 0x1f;
- ep->mii.reg_num_mask = 0x1f;
- ep->mii.dev = dev;
- ep->mii.mdio_read = ep93xx_mdio_read;
- ep->mii.mdio_write = ep93xx_mdio_write;
- ep->mdc_divisor = 40; /* Max HCLK 100 MHz, min MDIO clk 2.5 MHz. */
-
- if (is_zero_ether_addr(dev->dev_addr))
- random_ether_addr(dev->dev_addr);
-
- err = register_netdev(dev);
- if (err) {
- dev_err(&pdev->dev, "Failed to register netdev\n");
- goto err_out;
- }
-
- printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
- dev->name, ep->irq, dev->dev_addr);
-
- return 0;
-
-err_out:
- ep93xx_eth_remove(pdev);
- return err;
-}
-
-
-static struct platform_driver ep93xx_eth_driver = {
- .probe = ep93xx_eth_probe,
- .remove = ep93xx_eth_remove,
- .driver = {
- .name = "ep93xx-eth",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init ep93xx_eth_init_module(void)
-{
- printk(KERN_INFO DRV_MODULE_NAME " version " DRV_MODULE_VERSION " loading\n");
- return platform_driver_register(&ep93xx_eth_driver);
-}
-
-static void __exit ep93xx_eth_cleanup_module(void)
-{
- platform_driver_unregister(&ep93xx_eth_driver);
-}
-
-module_init(ep93xx_eth_init_module);
-module_exit(ep93xx_eth_cleanup_module);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:ep93xx-eth");
source "drivers/net/ethernet/broadcom/Kconfig"
source "drivers/net/ethernet/brocade/Kconfig"
source "drivers/net/ethernet/chelsio/Kconfig"
+source "drivers/net/ethernet/cirrus/Kconfig"
source "drivers/net/ethernet/cisco/Kconfig"
source "drivers/net/ethernet/dec/Kconfig"
source "drivers/net/ethernet/dlink/Kconfig"
obj-$(CONFIG_NET_VENDOR_BROADCOM) += broadcom/
obj-$(CONFIG_NET_VENDOR_BROCADE) += brocade/
obj-$(CONFIG_NET_VENDOR_CHELSIO) += chelsio/
+obj-$(CONFIG_NET_VENDOR_CIRRUS) += cirrus/
obj-$(CONFIG_NET_VENDOR_CISCO) += cisco/
obj-$(CONFIG_NET_VENDOR_DEC) += dec/
obj-$(CONFIG_NET_VENDOR_DLINK) += dlink/
--- /dev/null
+#
+# Cirrus network device configuration
+#
+
+config NET_VENDOR_CIRRUS
+ bool "Cirrus devices"
+ depends on ARM && ARCH_EP93XX
+ ---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 Cirrus cards. If you say Y, you will be asked
+ for your specific card in the following questions.
+
+if NET_VENDOR_CIRRUS
+
+config EP93XX_ETH
+ tristate "EP93xx Ethernet support"
+ depends on ARM && ARCH_EP93XX
+ select MII
+ help
+ This is a driver for the ethernet hardware included in EP93xx CPUs.
+ Say Y if you are building a kernel for EP93xx based devices.
+
+endif # NET_VENDOR_CIRRUS
--- /dev/null
+#
+# Makefile for the Cirrus network device drivers.
+#
+
+obj-$(CONFIG_EP93XX_ETH) += ep93xx_eth.o
--- /dev/null
+/*
+ * EP93xx ethernet network device driver
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ * Dedicated to Marija Kulikova.
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/mii.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+
+#include <mach/hardware.h>
+
+#define DRV_MODULE_NAME "ep93xx-eth"
+#define DRV_MODULE_VERSION "0.1"
+
+#define RX_QUEUE_ENTRIES 64
+#define TX_QUEUE_ENTRIES 8
+
+#define MAX_PKT_SIZE 2044
+#define PKT_BUF_SIZE 2048
+
+#define REG_RXCTL 0x0000
+#define REG_RXCTL_DEFAULT 0x00073800
+#define REG_TXCTL 0x0004
+#define REG_TXCTL_ENABLE 0x00000001
+#define REG_MIICMD 0x0010
+#define REG_MIICMD_READ 0x00008000
+#define REG_MIICMD_WRITE 0x00004000
+#define REG_MIIDATA 0x0014
+#define REG_MIISTS 0x0018
+#define REG_MIISTS_BUSY 0x00000001
+#define REG_SELFCTL 0x0020
+#define REG_SELFCTL_RESET 0x00000001
+#define REG_INTEN 0x0024
+#define REG_INTEN_TX 0x00000008
+#define REG_INTEN_RX 0x00000007
+#define REG_INTSTSP 0x0028
+#define REG_INTSTS_TX 0x00000008
+#define REG_INTSTS_RX 0x00000004
+#define REG_INTSTSC 0x002c
+#define REG_AFP 0x004c
+#define REG_INDAD0 0x0050
+#define REG_INDAD1 0x0051
+#define REG_INDAD2 0x0052
+#define REG_INDAD3 0x0053
+#define REG_INDAD4 0x0054
+#define REG_INDAD5 0x0055
+#define REG_GIINTMSK 0x0064
+#define REG_GIINTMSK_ENABLE 0x00008000
+#define REG_BMCTL 0x0080
+#define REG_BMCTL_ENABLE_TX 0x00000100
+#define REG_BMCTL_ENABLE_RX 0x00000001
+#define REG_BMSTS 0x0084
+#define REG_BMSTS_RX_ACTIVE 0x00000008
+#define REG_RXDQBADD 0x0090
+#define REG_RXDQBLEN 0x0094
+#define REG_RXDCURADD 0x0098
+#define REG_RXDENQ 0x009c
+#define REG_RXSTSQBADD 0x00a0
+#define REG_RXSTSQBLEN 0x00a4
+#define REG_RXSTSQCURADD 0x00a8
+#define REG_RXSTSENQ 0x00ac
+#define REG_TXDQBADD 0x00b0
+#define REG_TXDQBLEN 0x00b4
+#define REG_TXDQCURADD 0x00b8
+#define REG_TXDENQ 0x00bc
+#define REG_TXSTSQBADD 0x00c0
+#define REG_TXSTSQBLEN 0x00c4
+#define REG_TXSTSQCURADD 0x00c8
+#define REG_MAXFRMLEN 0x00e8
+
+struct ep93xx_rdesc
+{
+ u32 buf_addr;
+ u32 rdesc1;
+};
+
+#define RDESC1_NSOF 0x80000000
+#define RDESC1_BUFFER_INDEX 0x7fff0000
+#define RDESC1_BUFFER_LENGTH 0x0000ffff
+
+struct ep93xx_rstat
+{
+ u32 rstat0;
+ u32 rstat1;
+};
+
+#define RSTAT0_RFP 0x80000000
+#define RSTAT0_RWE 0x40000000
+#define RSTAT0_EOF 0x20000000
+#define RSTAT0_EOB 0x10000000
+#define RSTAT0_AM 0x00c00000
+#define RSTAT0_RX_ERR 0x00200000
+#define RSTAT0_OE 0x00100000
+#define RSTAT0_FE 0x00080000
+#define RSTAT0_RUNT 0x00040000
+#define RSTAT0_EDATA 0x00020000
+#define RSTAT0_CRCE 0x00010000
+#define RSTAT0_CRCI 0x00008000
+#define RSTAT0_HTI 0x00003f00
+#define RSTAT1_RFP 0x80000000
+#define RSTAT1_BUFFER_INDEX 0x7fff0000
+#define RSTAT1_FRAME_LENGTH 0x0000ffff
+
+struct ep93xx_tdesc
+{
+ u32 buf_addr;
+ u32 tdesc1;
+};
+
+#define TDESC1_EOF 0x80000000
+#define TDESC1_BUFFER_INDEX 0x7fff0000
+#define TDESC1_BUFFER_ABORT 0x00008000
+#define TDESC1_BUFFER_LENGTH 0x00000fff
+
+struct ep93xx_tstat
+{
+ u32 tstat0;
+};
+
+#define TSTAT0_TXFP 0x80000000
+#define TSTAT0_TXWE 0x40000000
+#define TSTAT0_FA 0x20000000
+#define TSTAT0_LCRS 0x10000000
+#define TSTAT0_OW 0x04000000
+#define TSTAT0_TXU 0x02000000
+#define TSTAT0_ECOLL 0x01000000
+#define TSTAT0_NCOLL 0x001f0000
+#define TSTAT0_BUFFER_INDEX 0x00007fff
+
+struct ep93xx_descs
+{
+ struct ep93xx_rdesc rdesc[RX_QUEUE_ENTRIES];
+ struct ep93xx_tdesc tdesc[TX_QUEUE_ENTRIES];
+ struct ep93xx_rstat rstat[RX_QUEUE_ENTRIES];
+ struct ep93xx_tstat tstat[TX_QUEUE_ENTRIES];
+};
+
+struct ep93xx_priv
+{
+ struct resource *res;
+ void __iomem *base_addr;
+ int irq;
+
+ struct ep93xx_descs *descs;
+ dma_addr_t descs_dma_addr;
+
+ void *rx_buf[RX_QUEUE_ENTRIES];
+ void *tx_buf[TX_QUEUE_ENTRIES];
+
+ spinlock_t rx_lock;
+ unsigned int rx_pointer;
+ unsigned int tx_clean_pointer;
+ unsigned int tx_pointer;
+ spinlock_t tx_pending_lock;
+ unsigned int tx_pending;
+
+ struct net_device *dev;
+ struct napi_struct napi;
+
+ struct mii_if_info mii;
+ u8 mdc_divisor;
+};
+
+#define rdb(ep, off) __raw_readb((ep)->base_addr + (off))
+#define rdw(ep, off) __raw_readw((ep)->base_addr + (off))
+#define rdl(ep, off) __raw_readl((ep)->base_addr + (off))
+#define wrb(ep, off, val) __raw_writeb((val), (ep)->base_addr + (off))
+#define wrw(ep, off, val) __raw_writew((val), (ep)->base_addr + (off))
+#define wrl(ep, off, val) __raw_writel((val), (ep)->base_addr + (off))
+
+static int ep93xx_mdio_read(struct net_device *dev, int phy_id, int reg)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int data;
+ int i;
+
+ wrl(ep, REG_MIICMD, REG_MIICMD_READ | (phy_id << 5) | reg);
+
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10) {
+ pr_info("mdio read timed out\n");
+ data = 0xffff;
+ } else {
+ data = rdl(ep, REG_MIIDATA);
+ }
+
+ return data;
+}
+
+static void ep93xx_mdio_write(struct net_device *dev, int phy_id, int reg, int data)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int i;
+
+ wrl(ep, REG_MIIDATA, data);
+ wrl(ep, REG_MIICMD, REG_MIICMD_WRITE | (phy_id << 5) | reg);
+
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_MIISTS) & REG_MIISTS_BUSY) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10)
+ pr_info("mdio write timed out\n");
+}
+
+static int ep93xx_rx(struct net_device *dev, int processed, int budget)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+
+ while (processed < budget) {
+ int entry;
+ struct ep93xx_rstat *rstat;
+ u32 rstat0;
+ u32 rstat1;
+ int length;
+ struct sk_buff *skb;
+
+ entry = ep->rx_pointer;
+ rstat = ep->descs->rstat + entry;
+
+ rstat0 = rstat->rstat0;
+ rstat1 = rstat->rstat1;
+ if (!(rstat0 & RSTAT0_RFP) || !(rstat1 & RSTAT1_RFP))
+ break;
+
+ rstat->rstat0 = 0;
+ rstat->rstat1 = 0;
+
+ if (!(rstat0 & RSTAT0_EOF))
+ pr_crit("not end-of-frame %.8x %.8x\n", rstat0, rstat1);
+ if (!(rstat0 & RSTAT0_EOB))
+ pr_crit("not end-of-buffer %.8x %.8x\n", rstat0, rstat1);
+ if ((rstat1 & RSTAT1_BUFFER_INDEX) >> 16 != entry)
+ pr_crit("entry mismatch %.8x %.8x\n", rstat0, rstat1);
+
+ if (!(rstat0 & RSTAT0_RWE)) {
+ dev->stats.rx_errors++;
+ if (rstat0 & RSTAT0_OE)
+ dev->stats.rx_fifo_errors++;
+ if (rstat0 & RSTAT0_FE)
+ dev->stats.rx_frame_errors++;
+ if (rstat0 & (RSTAT0_RUNT | RSTAT0_EDATA))
+ dev->stats.rx_length_errors++;
+ if (rstat0 & RSTAT0_CRCE)
+ dev->stats.rx_crc_errors++;
+ goto err;
+ }
+
+ length = rstat1 & RSTAT1_FRAME_LENGTH;
+ if (length > MAX_PKT_SIZE) {
+ pr_notice("invalid length %.8x %.8x\n", rstat0, rstat1);
+ goto err;
+ }
+
+ /* Strip FCS. */
+ if (rstat0 & RSTAT0_CRCI)
+ length -= 4;
+
+ skb = dev_alloc_skb(length + 2);
+ if (likely(skb != NULL)) {
+ struct ep93xx_rdesc *rxd = &ep->descs->rdesc[entry];
+ skb_reserve(skb, 2);
+ dma_sync_single_for_cpu(dev->dev.parent, rxd->buf_addr,
+ length, DMA_FROM_DEVICE);
+ skb_copy_to_linear_data(skb, ep->rx_buf[entry], length);
+ dma_sync_single_for_device(dev->dev.parent,
+ rxd->buf_addr, length,
+ DMA_FROM_DEVICE);
+ skb_put(skb, length);
+ skb->protocol = eth_type_trans(skb, dev);
+
+ netif_receive_skb(skb);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += length;
+ } else {
+ dev->stats.rx_dropped++;
+ }
+
+err:
+ ep->rx_pointer = (entry + 1) & (RX_QUEUE_ENTRIES - 1);
+ processed++;
+ }
+
+ return processed;
+}
+
+static int ep93xx_have_more_rx(struct ep93xx_priv *ep)
+{
+ struct ep93xx_rstat *rstat = ep->descs->rstat + ep->rx_pointer;
+ return !!((rstat->rstat0 & RSTAT0_RFP) && (rstat->rstat1 & RSTAT1_RFP));
+}
+
+static int ep93xx_poll(struct napi_struct *napi, int budget)
+{
+ struct ep93xx_priv *ep = container_of(napi, struct ep93xx_priv, napi);
+ struct net_device *dev = ep->dev;
+ int rx = 0;
+
+poll_some_more:
+ rx = ep93xx_rx(dev, rx, budget);
+ if (rx < budget) {
+ int more = 0;
+
+ spin_lock_irq(&ep->rx_lock);
+ __napi_complete(napi);
+ wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
+ if (ep93xx_have_more_rx(ep)) {
+ wrl(ep, REG_INTEN, REG_INTEN_TX);
+ wrl(ep, REG_INTSTSP, REG_INTSTS_RX);
+ more = 1;
+ }
+ spin_unlock_irq(&ep->rx_lock);
+
+ if (more && napi_reschedule(napi))
+ goto poll_some_more;
+ }
+
+ if (rx) {
+ wrw(ep, REG_RXDENQ, rx);
+ wrw(ep, REG_RXSTSENQ, rx);
+ }
+
+ return rx;
+}
+
+static int ep93xx_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ struct ep93xx_tdesc *txd;
+ int entry;
+
+ if (unlikely(skb->len > MAX_PKT_SIZE)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ entry = ep->tx_pointer;
+ ep->tx_pointer = (ep->tx_pointer + 1) & (TX_QUEUE_ENTRIES - 1);
+
+ txd = &ep->descs->tdesc[entry];
+
+ txd->tdesc1 = TDESC1_EOF | (entry << 16) | (skb->len & 0xfff);
+ dma_sync_single_for_cpu(dev->dev.parent, txd->buf_addr, skb->len,
+ DMA_TO_DEVICE);
+ skb_copy_and_csum_dev(skb, ep->tx_buf[entry]);
+ dma_sync_single_for_device(dev->dev.parent, txd->buf_addr, skb->len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb(skb);
+
+ spin_lock_irq(&ep->tx_pending_lock);
+ ep->tx_pending++;
+ if (ep->tx_pending == TX_QUEUE_ENTRIES)
+ netif_stop_queue(dev);
+ spin_unlock_irq(&ep->tx_pending_lock);
+
+ wrl(ep, REG_TXDENQ, 1);
+
+ return NETDEV_TX_OK;
+}
+
+static void ep93xx_tx_complete(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int wake;
+
+ wake = 0;
+
+ spin_lock(&ep->tx_pending_lock);
+ while (1) {
+ int entry;
+ struct ep93xx_tstat *tstat;
+ u32 tstat0;
+
+ entry = ep->tx_clean_pointer;
+ tstat = ep->descs->tstat + entry;
+
+ tstat0 = tstat->tstat0;
+ if (!(tstat0 & TSTAT0_TXFP))
+ break;
+
+ tstat->tstat0 = 0;
+
+ if (tstat0 & TSTAT0_FA)
+ pr_crit("frame aborted %.8x\n", tstat0);
+ if ((tstat0 & TSTAT0_BUFFER_INDEX) != entry)
+ pr_crit("entry mismatch %.8x\n", tstat0);
+
+ if (tstat0 & TSTAT0_TXWE) {
+ int length = ep->descs->tdesc[entry].tdesc1 & 0xfff;
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += length;
+ } else {
+ dev->stats.tx_errors++;
+ }
+
+ if (tstat0 & TSTAT0_OW)
+ dev->stats.tx_window_errors++;
+ if (tstat0 & TSTAT0_TXU)
+ dev->stats.tx_fifo_errors++;
+ dev->stats.collisions += (tstat0 >> 16) & 0x1f;
+
+ ep->tx_clean_pointer = (entry + 1) & (TX_QUEUE_ENTRIES - 1);
+ if (ep->tx_pending == TX_QUEUE_ENTRIES)
+ wake = 1;
+ ep->tx_pending--;
+ }
+ spin_unlock(&ep->tx_pending_lock);
+
+ if (wake)
+ netif_wake_queue(dev);
+}
+
+static irqreturn_t ep93xx_irq(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ u32 status;
+
+ status = rdl(ep, REG_INTSTSC);
+ if (status == 0)
+ return IRQ_NONE;
+
+ if (status & REG_INTSTS_RX) {
+ spin_lock(&ep->rx_lock);
+ if (likely(napi_schedule_prep(&ep->napi))) {
+ wrl(ep, REG_INTEN, REG_INTEN_TX);
+ __napi_schedule(&ep->napi);
+ }
+ spin_unlock(&ep->rx_lock);
+ }
+
+ if (status & REG_INTSTS_TX)
+ ep93xx_tx_complete(dev);
+
+ return IRQ_HANDLED;
+}
+
+static void ep93xx_free_buffers(struct ep93xx_priv *ep)
+{
+ struct device *dev = ep->dev->dev.parent;
+ int i;
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ dma_addr_t d;
+
+ d = ep->descs->rdesc[i].buf_addr;
+ if (d)
+ dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_FROM_DEVICE);
+
+ if (ep->rx_buf[i] != NULL)
+ kfree(ep->rx_buf[i]);
+ }
+
+ for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+ dma_addr_t d;
+
+ d = ep->descs->tdesc[i].buf_addr;
+ if (d)
+ dma_unmap_single(dev, d, PKT_BUF_SIZE, DMA_TO_DEVICE);
+
+ if (ep->tx_buf[i] != NULL)
+ kfree(ep->tx_buf[i]);
+ }
+
+ dma_free_coherent(dev, sizeof(struct ep93xx_descs), ep->descs,
+ ep->descs_dma_addr);
+}
+
+static int ep93xx_alloc_buffers(struct ep93xx_priv *ep)
+{
+ struct device *dev = ep->dev->dev.parent;
+ int i;
+
+ ep->descs = dma_alloc_coherent(dev, sizeof(struct ep93xx_descs),
+ &ep->descs_dma_addr, GFP_KERNEL);
+ if (ep->descs == NULL)
+ return 1;
+
+ for (i = 0; i < RX_QUEUE_ENTRIES; i++) {
+ void *buf;
+ dma_addr_t d;
+
+ buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
+ if (buf == NULL)
+ goto err;
+
+ d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, d)) {
+ kfree(buf);
+ goto err;
+ }
+
+ ep->rx_buf[i] = buf;
+ ep->descs->rdesc[i].buf_addr = d;
+ ep->descs->rdesc[i].rdesc1 = (i << 16) | PKT_BUF_SIZE;
+ }
+
+ for (i = 0; i < TX_QUEUE_ENTRIES; i++) {
+ void *buf;
+ dma_addr_t d;
+
+ buf = kmalloc(PKT_BUF_SIZE, GFP_KERNEL);
+ if (buf == NULL)
+ goto err;
+
+ d = dma_map_single(dev, buf, PKT_BUF_SIZE, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, d)) {
+ kfree(buf);
+ goto err;
+ }
+
+ ep->tx_buf[i] = buf;
+ ep->descs->tdesc[i].buf_addr = d;
+ }
+
+ return 0;
+
+err:
+ ep93xx_free_buffers(ep);
+ return 1;
+}
+
+static int ep93xx_start_hw(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ unsigned long addr;
+ int i;
+
+ wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10) {
+ pr_crit("hw failed to reset\n");
+ return 1;
+ }
+
+ wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9));
+
+ /* Does the PHY support preamble suppress? */
+ if ((ep93xx_mdio_read(dev, ep->mii.phy_id, MII_BMSR) & 0x0040) != 0)
+ wrl(ep, REG_SELFCTL, ((ep->mdc_divisor - 1) << 9) | (1 << 8));
+
+ /* Receive descriptor ring. */
+ addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rdesc);
+ wrl(ep, REG_RXDQBADD, addr);
+ wrl(ep, REG_RXDCURADD, addr);
+ wrw(ep, REG_RXDQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rdesc));
+
+ /* Receive status ring. */
+ addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, rstat);
+ wrl(ep, REG_RXSTSQBADD, addr);
+ wrl(ep, REG_RXSTSQCURADD, addr);
+ wrw(ep, REG_RXSTSQBLEN, RX_QUEUE_ENTRIES * sizeof(struct ep93xx_rstat));
+
+ /* Transmit descriptor ring. */
+ addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tdesc);
+ wrl(ep, REG_TXDQBADD, addr);
+ wrl(ep, REG_TXDQCURADD, addr);
+ wrw(ep, REG_TXDQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tdesc));
+
+ /* Transmit status ring. */
+ addr = ep->descs_dma_addr + offsetof(struct ep93xx_descs, tstat);
+ wrl(ep, REG_TXSTSQBADD, addr);
+ wrl(ep, REG_TXSTSQCURADD, addr);
+ wrw(ep, REG_TXSTSQBLEN, TX_QUEUE_ENTRIES * sizeof(struct ep93xx_tstat));
+
+ wrl(ep, REG_BMCTL, REG_BMCTL_ENABLE_TX | REG_BMCTL_ENABLE_RX);
+ wrl(ep, REG_INTEN, REG_INTEN_TX | REG_INTEN_RX);
+ wrl(ep, REG_GIINTMSK, 0);
+
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_BMSTS) & REG_BMSTS_RX_ACTIVE) != 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10) {
+ pr_crit("hw failed to start\n");
+ return 1;
+ }
+
+ wrl(ep, REG_RXDENQ, RX_QUEUE_ENTRIES);
+ wrl(ep, REG_RXSTSENQ, RX_QUEUE_ENTRIES);
+
+ wrb(ep, REG_INDAD0, dev->dev_addr[0]);
+ wrb(ep, REG_INDAD1, dev->dev_addr[1]);
+ wrb(ep, REG_INDAD2, dev->dev_addr[2]);
+ wrb(ep, REG_INDAD3, dev->dev_addr[3]);
+ wrb(ep, REG_INDAD4, dev->dev_addr[4]);
+ wrb(ep, REG_INDAD5, dev->dev_addr[5]);
+ wrl(ep, REG_AFP, 0);
+
+ wrl(ep, REG_MAXFRMLEN, (MAX_PKT_SIZE << 16) | MAX_PKT_SIZE);
+
+ wrl(ep, REG_RXCTL, REG_RXCTL_DEFAULT);
+ wrl(ep, REG_TXCTL, REG_TXCTL_ENABLE);
+
+ return 0;
+}
+
+static void ep93xx_stop_hw(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int i;
+
+ wrl(ep, REG_SELFCTL, REG_SELFCTL_RESET);
+ for (i = 0; i < 10; i++) {
+ if ((rdl(ep, REG_SELFCTL) & REG_SELFCTL_RESET) == 0)
+ break;
+ msleep(1);
+ }
+
+ if (i == 10)
+ pr_crit("hw failed to reset\n");
+}
+
+static int ep93xx_open(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ int err;
+
+ if (ep93xx_alloc_buffers(ep))
+ return -ENOMEM;
+
+ napi_enable(&ep->napi);
+
+ if (ep93xx_start_hw(dev)) {
+ napi_disable(&ep->napi);
+ ep93xx_free_buffers(ep);
+ return -EIO;
+ }
+
+ spin_lock_init(&ep->rx_lock);
+ ep->rx_pointer = 0;
+ ep->tx_clean_pointer = 0;
+ ep->tx_pointer = 0;
+ spin_lock_init(&ep->tx_pending_lock);
+ ep->tx_pending = 0;
+
+ err = request_irq(ep->irq, ep93xx_irq, IRQF_SHARED, dev->name, dev);
+ if (err) {
+ napi_disable(&ep->napi);
+ ep93xx_stop_hw(dev);
+ ep93xx_free_buffers(ep);
+ return err;
+ }
+
+ wrl(ep, REG_GIINTMSK, REG_GIINTMSK_ENABLE);
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+static int ep93xx_close(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+
+ napi_disable(&ep->napi);
+ netif_stop_queue(dev);
+
+ wrl(ep, REG_GIINTMSK, 0);
+ free_irq(ep->irq, dev);
+ ep93xx_stop_hw(dev);
+ ep93xx_free_buffers(ep);
+
+ return 0;
+}
+
+static int ep93xx_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ struct mii_ioctl_data *data = if_mii(ifr);
+
+ return generic_mii_ioctl(&ep->mii, data, cmd, NULL);
+}
+
+static void ep93xx_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_MODULE_NAME);
+ strcpy(info->version, DRV_MODULE_VERSION);
+}
+
+static int ep93xx_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ return mii_ethtool_gset(&ep->mii, cmd);
+}
+
+static int ep93xx_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ return mii_ethtool_sset(&ep->mii, cmd);
+}
+
+static int ep93xx_nway_reset(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ return mii_nway_restart(&ep->mii);
+}
+
+static u32 ep93xx_get_link(struct net_device *dev)
+{
+ struct ep93xx_priv *ep = netdev_priv(dev);
+ return mii_link_ok(&ep->mii);
+}
+
+static const struct ethtool_ops ep93xx_ethtool_ops = {
+ .get_drvinfo = ep93xx_get_drvinfo,
+ .get_settings = ep93xx_get_settings,
+ .set_settings = ep93xx_set_settings,
+ .nway_reset = ep93xx_nway_reset,
+ .get_link = ep93xx_get_link,
+};
+
+static const struct net_device_ops ep93xx_netdev_ops = {
+ .ndo_open = ep93xx_open,
+ .ndo_stop = ep93xx_close,
+ .ndo_start_xmit = ep93xx_xmit,
+ .ndo_do_ioctl = ep93xx_ioctl,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+};
+
+static struct net_device *ep93xx_dev_alloc(struct ep93xx_eth_data *data)
+{
+ struct net_device *dev;
+
+ dev = alloc_etherdev(sizeof(struct ep93xx_priv));
+ if (dev == NULL)
+ return NULL;
+
+ memcpy(dev->dev_addr, data->dev_addr, ETH_ALEN);
+
+ dev->ethtool_ops = &ep93xx_ethtool_ops;
+ dev->netdev_ops = &ep93xx_netdev_ops;
+
+ dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
+
+ return dev;
+}
+
+
+static int ep93xx_eth_remove(struct platform_device *pdev)
+{
+ struct net_device *dev;
+ struct ep93xx_priv *ep;
+
+ dev = platform_get_drvdata(pdev);
+ if (dev == NULL)
+ return 0;
+ platform_set_drvdata(pdev, NULL);
+
+ ep = netdev_priv(dev);
+
+ /* @@@ Force down. */
+ unregister_netdev(dev);
+ ep93xx_free_buffers(ep);
+
+ if (ep->base_addr != NULL)
+ iounmap(ep->base_addr);
+
+ if (ep->res != NULL) {
+ release_resource(ep->res);
+ kfree(ep->res);
+ }
+
+ free_netdev(dev);
+
+ return 0;
+}
+
+static int ep93xx_eth_probe(struct platform_device *pdev)
+{
+ struct ep93xx_eth_data *data;
+ struct net_device *dev;
+ struct ep93xx_priv *ep;
+ struct resource *mem;
+ int irq;
+ int err;
+
+ if (pdev == NULL)
+ return -ENODEV;
+ data = pdev->dev.platform_data;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irq = platform_get_irq(pdev, 0);
+ if (!mem || irq < 0)
+ return -ENXIO;
+
+ dev = ep93xx_dev_alloc(data);
+ if (dev == NULL) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+ ep = netdev_priv(dev);
+ ep->dev = dev;
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ netif_napi_add(dev, &ep->napi, ep93xx_poll, 64);
+
+ platform_set_drvdata(pdev, dev);
+
+ ep->res = request_mem_region(mem->start, resource_size(mem),
+ dev_name(&pdev->dev));
+ if (ep->res == NULL) {
+ dev_err(&pdev->dev, "Could not reserve memory region\n");
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ ep->base_addr = ioremap(mem->start, resource_size(mem));
+ if (ep->base_addr == NULL) {
+ dev_err(&pdev->dev, "Failed to ioremap ethernet registers\n");
+ err = -EIO;
+ goto err_out;
+ }
+ ep->irq = irq;
+
+ ep->mii.phy_id = data->phy_id;
+ ep->mii.phy_id_mask = 0x1f;
+ ep->mii.reg_num_mask = 0x1f;
+ ep->mii.dev = dev;
+ ep->mii.mdio_read = ep93xx_mdio_read;
+ ep->mii.mdio_write = ep93xx_mdio_write;
+ ep->mdc_divisor = 40; /* Max HCLK 100 MHz, min MDIO clk 2.5 MHz. */
+
+ if (is_zero_ether_addr(dev->dev_addr))
+ random_ether_addr(dev->dev_addr);
+
+ err = register_netdev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "Failed to register netdev\n");
+ goto err_out;
+ }
+
+ printk(KERN_INFO "%s: ep93xx on-chip ethernet, IRQ %d, %pM\n",
+ dev->name, ep->irq, dev->dev_addr);
+
+ return 0;
+
+err_out:
+ ep93xx_eth_remove(pdev);
+ return err;
+}
+
+
+static struct platform_driver ep93xx_eth_driver = {
+ .probe = ep93xx_eth_probe,
+ .remove = ep93xx_eth_remove,
+ .driver = {
+ .name = "ep93xx-eth",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init ep93xx_eth_init_module(void)
+{
+ printk(KERN_INFO DRV_MODULE_NAME " version " DRV_MODULE_VERSION " loading\n");
+ return platform_driver_register(&ep93xx_eth_driver);
+}
+
+static void __exit ep93xx_eth_cleanup_module(void)
+{
+ platform_driver_unregister(&ep93xx_eth_driver);
+}
+
+module_init(ep93xx_eth_init_module);
+module_exit(ep93xx_eth_cleanup_module);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:ep93xx-eth");
projects / openwrt / staging / blogic.git / commitdiff