From: Gabor Juhos Date: Wed, 22 Feb 2012 13:06:41 +0000 (+0000) Subject: ramips: raeth: rename main source file X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c1e4d709fa36f903665c7a5661008dbbee73f56e;p=openwrt%2Fstaging%2Frobimarko.git ramips: raeth: rename main source file SVN-Revision: 30679 --- diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/Makefile b/target/linux/ramips/files/drivers/net/ethernet/ramips/Makefile index db4a58f0e9..59db90090a 100644 --- a/target/linux/ramips/files/drivers/net/ethernet/ramips/Makefile +++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/Makefile @@ -2,4 +2,6 @@ # Makefile for the Ramips SoCs built-in ethernet macs # +ramips-y += ramips_main.o + obj-$(CONFIG_NET_RAMIPS) += ramips.o diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips.c deleted file mode 100644 index b9979fce5d..0000000000 --- a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips.c +++ /dev/null @@ -1,1025 +0,0 @@ -/* - * 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; version 2 of the License - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. - * - * Copyright (C) 2009 John Crispin - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include "ramips_eth.h" - -#define TX_TIMEOUT (20 * HZ / 100) -#define MAX_RX_LENGTH 1600 - -#ifdef CONFIG_RALINK_RT305X -#include "ramips_esw.c" -#else -static inline int rt305x_esw_init(void) { return 0; } -static inline void rt305x_esw_exit(void) { } -#endif - -#define phys_to_bus(a) (a & 0x1FFFFFFF) - -#ifdef CONFIG_RAMIPS_ETH_DEBUG -#define RADEBUG(fmt, args...) printk(KERN_DEBUG fmt, ## args) -#else -#define RADEBUG(fmt, args...) do {} while (0) -#endif - -static struct net_device * ramips_dev; -static void __iomem *ramips_fe_base = 0; - -static inline void -ramips_fe_wr(u32 val, unsigned reg) -{ - __raw_writel(val, ramips_fe_base + reg); -} - -static inline u32 -ramips_fe_rr(unsigned reg) -{ - return __raw_readl(ramips_fe_base + reg); -} - -static inline void -ramips_fe_int_disable(u32 mask) -{ - ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~mask, - RAMIPS_FE_INT_ENABLE); - /* flush write */ - ramips_fe_rr(RAMIPS_FE_INT_ENABLE); -} - -static inline void -ramips_fe_int_enable(u32 mask) -{ - ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | mask, - RAMIPS_FE_INT_ENABLE); - /* flush write */ - ramips_fe_rr(RAMIPS_FE_INT_ENABLE); -} - -static inline void -ramips_hw_set_macaddr(unsigned char *mac) -{ - ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH); - ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], - RAMIPS_GDMA1_MAC_ADRL); -} - -static struct sk_buff * -ramips_alloc_skb(struct raeth_priv *re) -{ - struct sk_buff *skb; - - skb = netdev_alloc_skb(re->netdev, MAX_RX_LENGTH + NET_IP_ALIGN); - if (!skb) - return NULL; - - skb_reserve(skb, NET_IP_ALIGN); - - return skb; -} - -static void -ramips_ring_setup(struct raeth_priv *re) -{ - int len; - int i; - - len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); - memset(re->tx, 0, len); - - for (i = 0; i < NUM_TX_DESC; i++) { - struct ramips_tx_dma *txd; - - txd = &re->tx[i]; - txd->txd4 = TX_DMA_QN(3) | TX_DMA_PN(1); - txd->txd2 = TX_DMA_LSO | TX_DMA_DONE; - - if (re->tx_skb[i] != NULL) { - netdev_warn(re->netdev, - "dirty skb for TX desc %d\n", i); - re->tx_skb[i] = NULL; - } - } - - len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); - memset(re->rx, 0, len); - - for (i = 0; i < NUM_RX_DESC; i++) { - dma_addr_t dma_addr; - - BUG_ON(re->rx_skb[i] == NULL); - dma_addr = dma_map_single(&re->netdev->dev, re->rx_skb[i]->data, - MAX_RX_LENGTH, DMA_FROM_DEVICE); - re->rx_dma[i] = dma_addr; - re->rx[i].rxd1 = (unsigned int) dma_addr; - re->rx[i].rxd2 = RX_DMA_LSO; - } - - /* flush descriptors */ - wmb(); -} - -static void -ramips_ring_cleanup(struct raeth_priv *re) -{ - int i; - - for (i = 0; i < NUM_RX_DESC; i++) - if (re->rx_skb[i]) - dma_unmap_single(&re->netdev->dev, re->rx_dma[i], - MAX_RX_LENGTH, DMA_FROM_DEVICE); - - for (i = 0; i < NUM_TX_DESC; i++) - if (re->tx_skb[i]) { - dev_kfree_skb_any(re->tx_skb[i]); - re->tx_skb[i] = NULL; - } -} - -#if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883) - -#define RAMIPS_MDIO_RETRY 1000 - -static unsigned char *ramips_speed_str(struct raeth_priv *re) -{ - switch (re->speed) { - case SPEED_1000: - return "1000"; - case SPEED_100: - return "100"; - case SPEED_10: - return "10"; - } - - return "?"; -} - -static void ramips_link_adjust(struct raeth_priv *re) -{ - struct ramips_eth_platform_data *pdata; - u32 mdio_cfg; - - pdata = re->parent->platform_data; - if (!re->link) { - netif_carrier_off(re->netdev); - netdev_info(re->netdev, "link down\n"); - return; - } - - mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 | - RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 | - RAMIPS_MDIO_CFG_GP1_FRC_EN; - - if (re->duplex == DUPLEX_FULL) - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX; - - if (re->tx_fc) - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX; - - if (re->rx_fc) - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX; - - switch (re->speed) { - case SPEED_10: - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10; - break; - case SPEED_100: - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100; - break; - case SPEED_1000: - mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000; - break; - default: - BUG(); - } - - ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG); - - netif_carrier_on(re->netdev); - netdev_info(re->netdev, "link up (%sMbps/%s duplex)\n", - ramips_speed_str(re), - (DUPLEX_FULL == re->duplex) ? "Full" : "Half"); -} - -static int -ramips_mdio_wait_ready(struct raeth_priv *re) -{ - int retries; - - retries = RAMIPS_MDIO_RETRY; - while (1) { - u32 t; - - t = ramips_fe_rr(RAMIPS_MDIO_ACCESS); - if ((t & (0x1 << 31)) == 0) - return 0; - - if (retries-- == 0) - break; - - udelay(1); - } - - dev_err(re->parent, "MDIO operation timed out\n"); - return -ETIMEDOUT; -} - -static int -ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) -{ - struct raeth_priv *re = bus->priv; - int err; - u32 t; - - err = ramips_mdio_wait_ready(re); - if (err) - return 0xffff; - - t = (phy_addr << 24) | (phy_reg << 16); - ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); - t |= (1 << 31); - ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); - - err = ramips_mdio_wait_ready(re); - if (err) - return 0xffff; - - RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__, - phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff); - - return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff; -} - -static int -ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val) -{ - struct raeth_priv *re = bus->priv; - int err; - u32 t; - - RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__, - phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff); - - err = ramips_mdio_wait_ready(re); - if (err) - return err; - - t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val; - ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); - t |= (1 << 31); - ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); - - return ramips_mdio_wait_ready(re); -} - -static int -ramips_mdio_reset(struct mii_bus *bus) -{ - /* TODO */ - return 0; -} - -static int -ramips_mdio_init(struct raeth_priv *re) -{ - int err; - int i; - - re->mii_bus = mdiobus_alloc(); - if (re->mii_bus == NULL) - return -ENOMEM; - - re->mii_bus->name = "ramips_mdio"; - re->mii_bus->read = ramips_mdio_read; - re->mii_bus->write = ramips_mdio_write; - re->mii_bus->reset = ramips_mdio_reset; - re->mii_bus->irq = re->mii_irq; - re->mii_bus->priv = re; - re->mii_bus->parent = re->parent; - - snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio"); - re->mii_bus->phy_mask = 0; - - for (i = 0; i < PHY_MAX_ADDR; i++) - re->mii_irq[i] = PHY_POLL; - - err = mdiobus_register(re->mii_bus); - if (err) - goto err_free_bus; - - return 0; - -err_free_bus: - kfree(re->mii_bus); - return err; -} - -static void -ramips_mdio_cleanup(struct raeth_priv *re) -{ - mdiobus_unregister(re->mii_bus); - kfree(re->mii_bus); -} - -static void -ramips_phy_link_adjust(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - struct phy_device *phydev = re->phy_dev; - unsigned long flags; - int status_change = 0; - - spin_lock_irqsave(&re->phy_lock, flags); - - if (phydev->link) - if (re->duplex != phydev->duplex || - re->speed != phydev->speed) - status_change = 1; - - if (phydev->link != re->link) - status_change = 1; - - re->link = phydev->link; - re->duplex = phydev->duplex; - re->speed = phydev->speed; - - if (status_change) - ramips_link_adjust(re); - - spin_unlock_irqrestore(&re->phy_lock, flags); -} - -static int -ramips_phy_connect_multi(struct raeth_priv *re) -{ - struct net_device *netdev = re->netdev; - struct ramips_eth_platform_data *pdata; - struct phy_device *phydev = NULL; - int phy_addr; - int ret = 0; - - pdata = re->parent->platform_data; - for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { - if (!(pdata->phy_mask & (1 << phy_addr))) - continue; - - if (re->mii_bus->phy_map[phy_addr] == NULL) - continue; - - RADEBUG("%s: PHY found at %s, uid=%08x\n", - netdev->name, - dev_name(&re->mii_bus->phy_map[phy_addr]->dev), - re->mii_bus->phy_map[phy_addr]->phy_id); - - if (phydev == NULL) - phydev = re->mii_bus->phy_map[phy_addr]; - } - - if (!phydev) { - netdev_err(netdev, "no PHY found with phy_mask=%08x\n", - pdata->phy_mask); - return -ENODEV; - } - - re->phy_dev = phy_connect(netdev, dev_name(&phydev->dev), - ramips_phy_link_adjust, 0, - pdata->phy_if_mode); - - if (IS_ERR(re->phy_dev)) { - netdev_err(netdev, "could not connect to PHY at %s\n", - dev_name(&phydev->dev)); - return PTR_ERR(re->phy_dev); - } - - phydev->supported &= PHY_GBIT_FEATURES; - phydev->advertising = phydev->supported; - - RADEBUG("%s: connected to PHY at %s [uid=%08x, driver=%s]\n", - netdev->name, dev_name(&phydev->dev), - phydev->phy_id, phydev->drv->name); - - re->link = 0; - re->speed = 0; - re->duplex = -1; - re->rx_fc = 0; - re->tx_fc = 0; - - return ret; -} - -static int -ramips_phy_connect_fixed(struct raeth_priv *re) -{ - struct ramips_eth_platform_data *pdata; - - pdata = re->parent->platform_data; - switch (pdata->speed) { - case SPEED_10: - case SPEED_100: - case SPEED_1000: - break; - default: - netdev_err(re->netdev, "invalid speed specified\n"); - return -EINVAL; - } - - RADEBUG("%s: using fixed link parameters\n", re->netdev->name); - - re->speed = pdata->speed; - re->duplex = pdata->duplex; - re->tx_fc = pdata->tx_fc; - re->rx_fc = pdata->tx_fc; - - return 0; -} - -static int -ramips_phy_connect(struct raeth_priv *re) -{ - struct ramips_eth_platform_data *pdata; - - pdata = re->parent->platform_data; - if (pdata->phy_mask) - return ramips_phy_connect_multi(re); - - return ramips_phy_connect_fixed(re); -} - -static void -ramips_phy_disconnect(struct raeth_priv *re) -{ - if (re->phy_dev) - phy_disconnect(re->phy_dev); -} - -static void -ramips_phy_start(struct raeth_priv *re) -{ - unsigned long flags; - - if (re->phy_dev) { - phy_start(re->phy_dev); - } else { - spin_lock_irqsave(&re->phy_lock, flags); - re->link = 1; - ramips_link_adjust(re); - spin_unlock_irqrestore(&re->phy_lock, flags); - } -} - -static void -ramips_phy_stop(struct raeth_priv *re) -{ - unsigned long flags; - - if (re->phy_dev) - phy_stop(re->phy_dev); - - spin_lock_irqsave(&re->phy_lock, flags); - re->link = 0; - ramips_link_adjust(re); - spin_unlock_irqrestore(&re->phy_lock, flags); -} -#else -static inline int -ramips_mdio_init(struct raeth_priv *re) -{ - return 0; -} - -static inline void -ramips_mdio_cleanup(struct raeth_priv *re) -{ -} - -static inline int -ramips_phy_connect(struct raeth_priv *re) -{ - return 0; -} - -static inline void -ramips_phy_disconnect(struct raeth_priv *re) -{ -} - -static inline void -ramips_phy_start(struct raeth_priv *re) -{ -} - -static inline void -ramips_phy_stop(struct raeth_priv *re) -{ -} -#endif /* CONFIG_RALINK_RT288X || CONFIG_RALINK_RT3883 */ - -static void -ramips_ring_free(struct raeth_priv *re) -{ - int len; - int i; - - for (i = 0; i < NUM_RX_DESC; i++) - if (re->rx_skb[i]) - dev_kfree_skb_any(re->rx_skb[i]); - - if (re->rx) { - len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); - dma_free_coherent(&re->netdev->dev, len, re->rx, - re->rx_desc_dma); - } - - if (re->tx) { - len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); - dma_free_coherent(&re->netdev->dev, len, re->tx, - re->tx_desc_dma); - } -} - -static int -ramips_ring_alloc(struct raeth_priv *re) -{ - int len; - int err = -ENOMEM; - int i; - - /* allocate tx ring */ - len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); - re->tx = dma_alloc_coherent(&re->netdev->dev, len, - &re->tx_desc_dma, GFP_ATOMIC); - if (!re->tx) - goto err_cleanup; - - /* allocate rx ring */ - len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); - re->rx = dma_alloc_coherent(&re->netdev->dev, len, - &re->rx_desc_dma, GFP_ATOMIC); - if (!re->rx) - goto err_cleanup; - - for (i = 0; i < NUM_RX_DESC; i++) { - struct sk_buff *skb; - - skb = ramips_alloc_skb(re); - if (!skb) - goto err_cleanup; - - re->rx_skb[i] = skb; - } - - return 0; - -err_cleanup: - ramips_ring_free(re); - return err; -} - -static void -ramips_setup_dma(struct raeth_priv *re) -{ - ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0); - ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0); - ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0); - ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG); - - ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0); - ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0); - ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0); - ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG); -} - -static int -ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - unsigned long tx; - unsigned int tx_next; - dma_addr_t mapped_addr; - - if (re->plat->min_pkt_len) { - if (skb->len < re->plat->min_pkt_len) { - if (skb_padto(skb, re->plat->min_pkt_len)) { - printk(KERN_ERR - "ramips_eth: skb_padto failed\n"); - kfree_skb(skb); - return 0; - } - skb_put(skb, re->plat->min_pkt_len - skb->len); - } - } - - dev->trans_start = jiffies; - mapped_addr = dma_map_single(&re->netdev->dev, skb->data, skb->len, - DMA_TO_DEVICE); - - spin_lock(&re->page_lock); - tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0); - tx_next = (tx + 1) % NUM_TX_DESC; - - if ((re->tx_skb[tx]) || (re->tx_skb[tx_next]) || - !(re->tx[tx].txd2 & TX_DMA_DONE) || - !(re->tx[tx_next].txd2 & TX_DMA_DONE)) - goto out; - - re->tx[tx].txd1 = (unsigned int) mapped_addr; - re->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE); - re->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len); - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; - re->tx_skb[tx] = skb; - wmb(); - ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0); - spin_unlock(&re->page_lock); - return NETDEV_TX_OK; - - out: - spin_unlock(&re->page_lock); - dev->stats.tx_dropped++; - kfree_skb(skb); - return NETDEV_TX_OK; -} - -static void -ramips_eth_rx_hw(unsigned long ptr) -{ - struct net_device *dev = (struct net_device *) ptr; - struct raeth_priv *re = netdev_priv(dev); - int rx; - int max_rx = 16; - - while (max_rx) { - struct sk_buff *rx_skb, *new_skb; - int pktlen; - - rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC; - if (!(re->rx[rx].rxd2 & RX_DMA_DONE)) - break; - max_rx--; - - rx_skb = re->rx_skb[rx]; - pktlen = RX_DMA_PLEN0(re->rx[rx].rxd2); - - new_skb = ramips_alloc_skb(re); - /* Reuse the buffer on allocation failures */ - if (new_skb) { - dma_addr_t dma_addr; - - dma_unmap_single(&re->netdev->dev, re->rx_dma[rx], - MAX_RX_LENGTH, DMA_FROM_DEVICE); - - skb_put(rx_skb, pktlen); - rx_skb->dev = dev; - rx_skb->protocol = eth_type_trans(rx_skb, dev); - rx_skb->ip_summed = CHECKSUM_NONE; - dev->stats.rx_packets++; - dev->stats.rx_bytes += pktlen; - netif_rx(rx_skb); - - re->rx_skb[rx] = new_skb; - - dma_addr = dma_map_single(&re->netdev->dev, - new_skb->data, - MAX_RX_LENGTH, - DMA_FROM_DEVICE); - re->rx_dma[rx] = dma_addr; - re->rx[rx].rxd1 = (unsigned int) dma_addr; - } else { - dev->stats.rx_dropped++; - } - - re->rx[rx].rxd2 &= ~RX_DMA_DONE; - wmb(); - ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0); - } - - if (max_rx == 0) - tasklet_schedule(&re->rx_tasklet); - else - ramips_fe_int_enable(RAMIPS_RX_DLY_INT); -} - -static void -ramips_eth_tx_housekeeping(unsigned long ptr) -{ - struct net_device *dev = (struct net_device*)ptr; - struct raeth_priv *re = netdev_priv(dev); - - spin_lock(&re->page_lock); - while ((re->tx[re->skb_free_idx].txd2 & TX_DMA_DONE) && - (re->tx_skb[re->skb_free_idx])) { - dev_kfree_skb_irq(re->tx_skb[re->skb_free_idx]); - re->tx_skb[re->skb_free_idx] = 0; - re->skb_free_idx++; - if (re->skb_free_idx >= NUM_TX_DESC) - re->skb_free_idx = 0; - } - spin_unlock(&re->page_lock); - - ramips_fe_int_enable(RAMIPS_TX_DLY_INT); -} - -static void -ramips_eth_timeout(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - - tasklet_schedule(&re->tx_housekeeping_tasklet); -} - -static irqreturn_t -ramips_eth_irq(int irq, void *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS); - - ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS); - - if (fe_int & RAMIPS_RX_DLY_INT) { - ramips_fe_int_disable(RAMIPS_RX_DLY_INT); - tasklet_schedule(&re->rx_tasklet); - } - - if (fe_int & RAMIPS_TX_DLY_INT) { - ramips_fe_int_disable(RAMIPS_TX_DLY_INT); - tasklet_schedule(&re->tx_housekeeping_tasklet); - } - - return IRQ_HANDLED; -} - -static int -ramips_eth_open(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - int err; - - err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, - dev->name, dev); - if (err) - return err; - - err = ramips_ring_alloc(re); - if (err) - goto err_free_irq; - - ramips_ring_setup(re); - ramips_hw_set_macaddr(dev->dev_addr); - - ramips_setup_dma(re); - ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) | - (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | - RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS), - RAMIPS_PDMA_GLO_CFG); - ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) & - ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) | - ((re->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT), - RAMIPS_FE_GLO_CFG); - - tasklet_init(&re->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping, - (unsigned long)dev); - tasklet_init(&re->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev); - - ramips_phy_start(re); - - ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG); - ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE); - ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) & - ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff), - RAMIPS_GDMA1_FWD_CFG); - ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) & - ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN), - RAMIPS_CDMA_CSG_CFG); - ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG); - ramips_fe_wr(1, RAMIPS_FE_RST_GL); - ramips_fe_wr(0, RAMIPS_FE_RST_GL); - - netif_start_queue(dev); - return 0; - - err_free_irq: - free_irq(dev->irq, dev); - return err; -} - -static int -ramips_eth_stop(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - - ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & - ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN), - RAMIPS_PDMA_GLO_CFG); - - /* disable all interrupts in the hw */ - ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE); - - ramips_phy_stop(re); - free_irq(dev->irq, dev); - netif_stop_queue(dev); - tasklet_kill(&re->tx_housekeeping_tasklet); - tasklet_kill(&re->rx_tasklet); - ramips_ring_cleanup(re); - ramips_ring_free(re); - RADEBUG("ramips_eth: stopped\n"); - return 0; -} - -static int __init -ramips_eth_probe(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - int err; - - BUG_ON(!re->plat->reset_fe); - re->plat->reset_fe(); - net_srandom(jiffies); - memcpy(dev->dev_addr, re->plat->mac, ETH_ALEN); - - ether_setup(dev); - dev->mtu = 1500; - dev->watchdog_timeo = TX_TIMEOUT; - spin_lock_init(&re->page_lock); - spin_lock_init(&re->phy_lock); - - err = ramips_mdio_init(re); - if (err) - return err; - - err = ramips_phy_connect(re); - if (err) - goto err_mdio_cleanup; - - return 0; - -err_mdio_cleanup: - ramips_mdio_cleanup(re); - return err; -} - -static void -ramips_eth_uninit(struct net_device *dev) -{ - struct raeth_priv *re = netdev_priv(dev); - - ramips_phy_disconnect(re); - ramips_mdio_cleanup(re); -} - -static const struct net_device_ops ramips_eth_netdev_ops = { - .ndo_init = ramips_eth_probe, - .ndo_uninit = ramips_eth_uninit, - .ndo_open = ramips_eth_open, - .ndo_stop = ramips_eth_stop, - .ndo_start_xmit = ramips_eth_hard_start_xmit, - .ndo_tx_timeout = ramips_eth_timeout, - .ndo_change_mtu = eth_change_mtu, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -}; - -static int -ramips_eth_plat_probe(struct platform_device *plat) -{ - struct raeth_priv *re; - struct ramips_eth_platform_data *data = plat->dev.platform_data; - struct resource *res; - int err; - - if (!data) { - dev_err(&plat->dev, "no platform data specified\n"); - return -EINVAL; - } - - res = platform_get_resource(plat, IORESOURCE_MEM, 0); - if (!res) { - dev_err(&plat->dev, "no memory resource found\n"); - return -ENXIO; - } - - ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1); - if (!ramips_fe_base) - return -ENOMEM; - - ramips_dev = alloc_etherdev(sizeof(struct raeth_priv)); - if (!ramips_dev) { - dev_err(&plat->dev, "alloc_etherdev failed\n"); - err = -ENOMEM; - goto err_unmap; - } - - strcpy(ramips_dev->name, "eth%d"); - ramips_dev->irq = platform_get_irq(plat, 0); - if (ramips_dev->irq < 0) { - dev_err(&plat->dev, "no IRQ resource found\n"); - err = -ENXIO; - goto err_free_dev; - } - ramips_dev->addr_len = ETH_ALEN; - ramips_dev->base_addr = (unsigned long)ramips_fe_base; - ramips_dev->netdev_ops = &ramips_eth_netdev_ops; - - re = netdev_priv(ramips_dev); - - re->netdev = ramips_dev; - re->parent = &plat->dev; - re->speed = data->speed; - re->duplex = data->duplex; - re->rx_fc = data->rx_fc; - re->tx_fc = data->tx_fc; - re->plat = data; - - err = register_netdev(ramips_dev); - if (err) { - dev_err(&plat->dev, "error bringing up device\n"); - goto err_free_dev; - } - - RADEBUG("ramips_eth: loaded\n"); - return 0; - - err_free_dev: - kfree(ramips_dev); - err_unmap: - iounmap(ramips_fe_base); - return err; -} - -static int -ramips_eth_plat_remove(struct platform_device *plat) -{ - unregister_netdev(ramips_dev); - free_netdev(ramips_dev); - RADEBUG("ramips_eth: unloaded\n"); - return 0; -} - -static struct platform_driver ramips_eth_driver = { - .probe = ramips_eth_plat_probe, - .remove = ramips_eth_plat_remove, - .driver = { - .name = "ramips_eth", - .owner = THIS_MODULE, - }, -}; - -static int __init -ramips_eth_init(void) -{ - int ret; - - ret = rt305x_esw_init(); - if (ret) - return ret; - - ret = platform_driver_register(&ramips_eth_driver); - if (ret) { - printk(KERN_ERR - "ramips_eth: Error registering platfom driver!\n"); - goto esw_cleanup; - } - - return 0; - -esw_cleanup: - rt305x_esw_exit(); - return ret; -} - -static void __exit -ramips_eth_cleanup(void) -{ - platform_driver_unregister(&ramips_eth_driver); - rt305x_esw_exit(); -} - -module_init(ramips_eth_init); -module_exit(ramips_eth_cleanup); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("John Crispin "); -MODULE_DESCRIPTION("ethernet driver for ramips boards"); diff --git a/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c new file mode 100644 index 0000000000..b9979fce5d --- /dev/null +++ b/target/linux/ramips/files/drivers/net/ethernet/ramips/ramips_main.c @@ -0,0 +1,1025 @@ +/* + * 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; version 2 of the License + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2009 John Crispin + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include "ramips_eth.h" + +#define TX_TIMEOUT (20 * HZ / 100) +#define MAX_RX_LENGTH 1600 + +#ifdef CONFIG_RALINK_RT305X +#include "ramips_esw.c" +#else +static inline int rt305x_esw_init(void) { return 0; } +static inline void rt305x_esw_exit(void) { } +#endif + +#define phys_to_bus(a) (a & 0x1FFFFFFF) + +#ifdef CONFIG_RAMIPS_ETH_DEBUG +#define RADEBUG(fmt, args...) printk(KERN_DEBUG fmt, ## args) +#else +#define RADEBUG(fmt, args...) do {} while (0) +#endif + +static struct net_device * ramips_dev; +static void __iomem *ramips_fe_base = 0; + +static inline void +ramips_fe_wr(u32 val, unsigned reg) +{ + __raw_writel(val, ramips_fe_base + reg); +} + +static inline u32 +ramips_fe_rr(unsigned reg) +{ + return __raw_readl(ramips_fe_base + reg); +} + +static inline void +ramips_fe_int_disable(u32 mask) +{ + ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~mask, + RAMIPS_FE_INT_ENABLE); + /* flush write */ + ramips_fe_rr(RAMIPS_FE_INT_ENABLE); +} + +static inline void +ramips_fe_int_enable(u32 mask) +{ + ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | mask, + RAMIPS_FE_INT_ENABLE); + /* flush write */ + ramips_fe_rr(RAMIPS_FE_INT_ENABLE); +} + +static inline void +ramips_hw_set_macaddr(unsigned char *mac) +{ + ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH); + ramips_fe_wr((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], + RAMIPS_GDMA1_MAC_ADRL); +} + +static struct sk_buff * +ramips_alloc_skb(struct raeth_priv *re) +{ + struct sk_buff *skb; + + skb = netdev_alloc_skb(re->netdev, MAX_RX_LENGTH + NET_IP_ALIGN); + if (!skb) + return NULL; + + skb_reserve(skb, NET_IP_ALIGN); + + return skb; +} + +static void +ramips_ring_setup(struct raeth_priv *re) +{ + int len; + int i; + + len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); + memset(re->tx, 0, len); + + for (i = 0; i < NUM_TX_DESC; i++) { + struct ramips_tx_dma *txd; + + txd = &re->tx[i]; + txd->txd4 = TX_DMA_QN(3) | TX_DMA_PN(1); + txd->txd2 = TX_DMA_LSO | TX_DMA_DONE; + + if (re->tx_skb[i] != NULL) { + netdev_warn(re->netdev, + "dirty skb for TX desc %d\n", i); + re->tx_skb[i] = NULL; + } + } + + len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); + memset(re->rx, 0, len); + + for (i = 0; i < NUM_RX_DESC; i++) { + dma_addr_t dma_addr; + + BUG_ON(re->rx_skb[i] == NULL); + dma_addr = dma_map_single(&re->netdev->dev, re->rx_skb[i]->data, + MAX_RX_LENGTH, DMA_FROM_DEVICE); + re->rx_dma[i] = dma_addr; + re->rx[i].rxd1 = (unsigned int) dma_addr; + re->rx[i].rxd2 = RX_DMA_LSO; + } + + /* flush descriptors */ + wmb(); +} + +static void +ramips_ring_cleanup(struct raeth_priv *re) +{ + int i; + + for (i = 0; i < NUM_RX_DESC; i++) + if (re->rx_skb[i]) + dma_unmap_single(&re->netdev->dev, re->rx_dma[i], + MAX_RX_LENGTH, DMA_FROM_DEVICE); + + for (i = 0; i < NUM_TX_DESC; i++) + if (re->tx_skb[i]) { + dev_kfree_skb_any(re->tx_skb[i]); + re->tx_skb[i] = NULL; + } +} + +#if defined(CONFIG_RALINK_RT288X) || defined(CONFIG_RALINK_RT3883) + +#define RAMIPS_MDIO_RETRY 1000 + +static unsigned char *ramips_speed_str(struct raeth_priv *re) +{ + switch (re->speed) { + case SPEED_1000: + return "1000"; + case SPEED_100: + return "100"; + case SPEED_10: + return "10"; + } + + return "?"; +} + +static void ramips_link_adjust(struct raeth_priv *re) +{ + struct ramips_eth_platform_data *pdata; + u32 mdio_cfg; + + pdata = re->parent->platform_data; + if (!re->link) { + netif_carrier_off(re->netdev); + netdev_info(re->netdev, "link down\n"); + return; + } + + mdio_cfg = RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 | + RAMIPS_MDIO_CFG_TX_CLK_SKEW_200 | + RAMIPS_MDIO_CFG_GP1_FRC_EN; + + if (re->duplex == DUPLEX_FULL) + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_DUPLEX; + + if (re->tx_fc) + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_TX; + + if (re->rx_fc) + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_FC_RX; + + switch (re->speed) { + case SPEED_10: + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_10; + break; + case SPEED_100: + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_100; + break; + case SPEED_1000: + mdio_cfg |= RAMIPS_MDIO_CFG_GP1_SPEED_1000; + break; + default: + BUG(); + } + + ramips_fe_wr(mdio_cfg, RAMIPS_MDIO_CFG); + + netif_carrier_on(re->netdev); + netdev_info(re->netdev, "link up (%sMbps/%s duplex)\n", + ramips_speed_str(re), + (DUPLEX_FULL == re->duplex) ? "Full" : "Half"); +} + +static int +ramips_mdio_wait_ready(struct raeth_priv *re) +{ + int retries; + + retries = RAMIPS_MDIO_RETRY; + while (1) { + u32 t; + + t = ramips_fe_rr(RAMIPS_MDIO_ACCESS); + if ((t & (0x1 << 31)) == 0) + return 0; + + if (retries-- == 0) + break; + + udelay(1); + } + + dev_err(re->parent, "MDIO operation timed out\n"); + return -ETIMEDOUT; +} + +static int +ramips_mdio_read(struct mii_bus *bus, int phy_addr, int phy_reg) +{ + struct raeth_priv *re = bus->priv; + int err; + u32 t; + + err = ramips_mdio_wait_ready(re); + if (err) + return 0xffff; + + t = (phy_addr << 24) | (phy_reg << 16); + ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); + t |= (1 << 31); + ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); + + err = ramips_mdio_wait_ready(re); + if (err) + return 0xffff; + + RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__, + phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff); + + return ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff; +} + +static int +ramips_mdio_write(struct mii_bus *bus, int phy_addr, int phy_reg, u16 val) +{ + struct raeth_priv *re = bus->priv; + int err; + u32 t; + + RADEBUG("%s: addr=%04x, reg=%04x, value=%04x\n", __func__, + phy_addr, phy_reg, ramips_fe_rr(RAMIPS_MDIO_ACCESS) & 0xffff); + + err = ramips_mdio_wait_ready(re); + if (err) + return err; + + t = (1 << 30) | (phy_addr << 24) | (phy_reg << 16) | val; + ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); + t |= (1 << 31); + ramips_fe_wr(t, RAMIPS_MDIO_ACCESS); + + return ramips_mdio_wait_ready(re); +} + +static int +ramips_mdio_reset(struct mii_bus *bus) +{ + /* TODO */ + return 0; +} + +static int +ramips_mdio_init(struct raeth_priv *re) +{ + int err; + int i; + + re->mii_bus = mdiobus_alloc(); + if (re->mii_bus == NULL) + return -ENOMEM; + + re->mii_bus->name = "ramips_mdio"; + re->mii_bus->read = ramips_mdio_read; + re->mii_bus->write = ramips_mdio_write; + re->mii_bus->reset = ramips_mdio_reset; + re->mii_bus->irq = re->mii_irq; + re->mii_bus->priv = re; + re->mii_bus->parent = re->parent; + + snprintf(re->mii_bus->id, MII_BUS_ID_SIZE, "%s", "ramips_mdio"); + re->mii_bus->phy_mask = 0; + + for (i = 0; i < PHY_MAX_ADDR; i++) + re->mii_irq[i] = PHY_POLL; + + err = mdiobus_register(re->mii_bus); + if (err) + goto err_free_bus; + + return 0; + +err_free_bus: + kfree(re->mii_bus); + return err; +} + +static void +ramips_mdio_cleanup(struct raeth_priv *re) +{ + mdiobus_unregister(re->mii_bus); + kfree(re->mii_bus); +} + +static void +ramips_phy_link_adjust(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + struct phy_device *phydev = re->phy_dev; + unsigned long flags; + int status_change = 0; + + spin_lock_irqsave(&re->phy_lock, flags); + + if (phydev->link) + if (re->duplex != phydev->duplex || + re->speed != phydev->speed) + status_change = 1; + + if (phydev->link != re->link) + status_change = 1; + + re->link = phydev->link; + re->duplex = phydev->duplex; + re->speed = phydev->speed; + + if (status_change) + ramips_link_adjust(re); + + spin_unlock_irqrestore(&re->phy_lock, flags); +} + +static int +ramips_phy_connect_multi(struct raeth_priv *re) +{ + struct net_device *netdev = re->netdev; + struct ramips_eth_platform_data *pdata; + struct phy_device *phydev = NULL; + int phy_addr; + int ret = 0; + + pdata = re->parent->platform_data; + for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { + if (!(pdata->phy_mask & (1 << phy_addr))) + continue; + + if (re->mii_bus->phy_map[phy_addr] == NULL) + continue; + + RADEBUG("%s: PHY found at %s, uid=%08x\n", + netdev->name, + dev_name(&re->mii_bus->phy_map[phy_addr]->dev), + re->mii_bus->phy_map[phy_addr]->phy_id); + + if (phydev == NULL) + phydev = re->mii_bus->phy_map[phy_addr]; + } + + if (!phydev) { + netdev_err(netdev, "no PHY found with phy_mask=%08x\n", + pdata->phy_mask); + return -ENODEV; + } + + re->phy_dev = phy_connect(netdev, dev_name(&phydev->dev), + ramips_phy_link_adjust, 0, + pdata->phy_if_mode); + + if (IS_ERR(re->phy_dev)) { + netdev_err(netdev, "could not connect to PHY at %s\n", + dev_name(&phydev->dev)); + return PTR_ERR(re->phy_dev); + } + + phydev->supported &= PHY_GBIT_FEATURES; + phydev->advertising = phydev->supported; + + RADEBUG("%s: connected to PHY at %s [uid=%08x, driver=%s]\n", + netdev->name, dev_name(&phydev->dev), + phydev->phy_id, phydev->drv->name); + + re->link = 0; + re->speed = 0; + re->duplex = -1; + re->rx_fc = 0; + re->tx_fc = 0; + + return ret; +} + +static int +ramips_phy_connect_fixed(struct raeth_priv *re) +{ + struct ramips_eth_platform_data *pdata; + + pdata = re->parent->platform_data; + switch (pdata->speed) { + case SPEED_10: + case SPEED_100: + case SPEED_1000: + break; + default: + netdev_err(re->netdev, "invalid speed specified\n"); + return -EINVAL; + } + + RADEBUG("%s: using fixed link parameters\n", re->netdev->name); + + re->speed = pdata->speed; + re->duplex = pdata->duplex; + re->tx_fc = pdata->tx_fc; + re->rx_fc = pdata->tx_fc; + + return 0; +} + +static int +ramips_phy_connect(struct raeth_priv *re) +{ + struct ramips_eth_platform_data *pdata; + + pdata = re->parent->platform_data; + if (pdata->phy_mask) + return ramips_phy_connect_multi(re); + + return ramips_phy_connect_fixed(re); +} + +static void +ramips_phy_disconnect(struct raeth_priv *re) +{ + if (re->phy_dev) + phy_disconnect(re->phy_dev); +} + +static void +ramips_phy_start(struct raeth_priv *re) +{ + unsigned long flags; + + if (re->phy_dev) { + phy_start(re->phy_dev); + } else { + spin_lock_irqsave(&re->phy_lock, flags); + re->link = 1; + ramips_link_adjust(re); + spin_unlock_irqrestore(&re->phy_lock, flags); + } +} + +static void +ramips_phy_stop(struct raeth_priv *re) +{ + unsigned long flags; + + if (re->phy_dev) + phy_stop(re->phy_dev); + + spin_lock_irqsave(&re->phy_lock, flags); + re->link = 0; + ramips_link_adjust(re); + spin_unlock_irqrestore(&re->phy_lock, flags); +} +#else +static inline int +ramips_mdio_init(struct raeth_priv *re) +{ + return 0; +} + +static inline void +ramips_mdio_cleanup(struct raeth_priv *re) +{ +} + +static inline int +ramips_phy_connect(struct raeth_priv *re) +{ + return 0; +} + +static inline void +ramips_phy_disconnect(struct raeth_priv *re) +{ +} + +static inline void +ramips_phy_start(struct raeth_priv *re) +{ +} + +static inline void +ramips_phy_stop(struct raeth_priv *re) +{ +} +#endif /* CONFIG_RALINK_RT288X || CONFIG_RALINK_RT3883 */ + +static void +ramips_ring_free(struct raeth_priv *re) +{ + int len; + int i; + + for (i = 0; i < NUM_RX_DESC; i++) + if (re->rx_skb[i]) + dev_kfree_skb_any(re->rx_skb[i]); + + if (re->rx) { + len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); + dma_free_coherent(&re->netdev->dev, len, re->rx, + re->rx_desc_dma); + } + + if (re->tx) { + len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); + dma_free_coherent(&re->netdev->dev, len, re->tx, + re->tx_desc_dma); + } +} + +static int +ramips_ring_alloc(struct raeth_priv *re) +{ + int len; + int err = -ENOMEM; + int i; + + /* allocate tx ring */ + len = NUM_TX_DESC * sizeof(struct ramips_tx_dma); + re->tx = dma_alloc_coherent(&re->netdev->dev, len, + &re->tx_desc_dma, GFP_ATOMIC); + if (!re->tx) + goto err_cleanup; + + /* allocate rx ring */ + len = NUM_RX_DESC * sizeof(struct ramips_rx_dma); + re->rx = dma_alloc_coherent(&re->netdev->dev, len, + &re->rx_desc_dma, GFP_ATOMIC); + if (!re->rx) + goto err_cleanup; + + for (i = 0; i < NUM_RX_DESC; i++) { + struct sk_buff *skb; + + skb = ramips_alloc_skb(re); + if (!skb) + goto err_cleanup; + + re->rx_skb[i] = skb; + } + + return 0; + +err_cleanup: + ramips_ring_free(re); + return err; +} + +static void +ramips_setup_dma(struct raeth_priv *re) +{ + ramips_fe_wr(re->tx_desc_dma, RAMIPS_TX_BASE_PTR0); + ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0); + ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0); + ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG); + + ramips_fe_wr(re->rx_desc_dma, RAMIPS_RX_BASE_PTR0); + ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0); + ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0); + ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG); +} + +static int +ramips_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + unsigned long tx; + unsigned int tx_next; + dma_addr_t mapped_addr; + + if (re->plat->min_pkt_len) { + if (skb->len < re->plat->min_pkt_len) { + if (skb_padto(skb, re->plat->min_pkt_len)) { + printk(KERN_ERR + "ramips_eth: skb_padto failed\n"); + kfree_skb(skb); + return 0; + } + skb_put(skb, re->plat->min_pkt_len - skb->len); + } + } + + dev->trans_start = jiffies; + mapped_addr = dma_map_single(&re->netdev->dev, skb->data, skb->len, + DMA_TO_DEVICE); + + spin_lock(&re->page_lock); + tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0); + tx_next = (tx + 1) % NUM_TX_DESC; + + if ((re->tx_skb[tx]) || (re->tx_skb[tx_next]) || + !(re->tx[tx].txd2 & TX_DMA_DONE) || + !(re->tx[tx_next].txd2 & TX_DMA_DONE)) + goto out; + + re->tx[tx].txd1 = (unsigned int) mapped_addr; + re->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE); + re->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len); + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + re->tx_skb[tx] = skb; + wmb(); + ramips_fe_wr(tx_next, RAMIPS_TX_CTX_IDX0); + spin_unlock(&re->page_lock); + return NETDEV_TX_OK; + + out: + spin_unlock(&re->page_lock); + dev->stats.tx_dropped++; + kfree_skb(skb); + return NETDEV_TX_OK; +} + +static void +ramips_eth_rx_hw(unsigned long ptr) +{ + struct net_device *dev = (struct net_device *) ptr; + struct raeth_priv *re = netdev_priv(dev); + int rx; + int max_rx = 16; + + while (max_rx) { + struct sk_buff *rx_skb, *new_skb; + int pktlen; + + rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC; + if (!(re->rx[rx].rxd2 & RX_DMA_DONE)) + break; + max_rx--; + + rx_skb = re->rx_skb[rx]; + pktlen = RX_DMA_PLEN0(re->rx[rx].rxd2); + + new_skb = ramips_alloc_skb(re); + /* Reuse the buffer on allocation failures */ + if (new_skb) { + dma_addr_t dma_addr; + + dma_unmap_single(&re->netdev->dev, re->rx_dma[rx], + MAX_RX_LENGTH, DMA_FROM_DEVICE); + + skb_put(rx_skb, pktlen); + rx_skb->dev = dev; + rx_skb->protocol = eth_type_trans(rx_skb, dev); + rx_skb->ip_summed = CHECKSUM_NONE; + dev->stats.rx_packets++; + dev->stats.rx_bytes += pktlen; + netif_rx(rx_skb); + + re->rx_skb[rx] = new_skb; + + dma_addr = dma_map_single(&re->netdev->dev, + new_skb->data, + MAX_RX_LENGTH, + DMA_FROM_DEVICE); + re->rx_dma[rx] = dma_addr; + re->rx[rx].rxd1 = (unsigned int) dma_addr; + } else { + dev->stats.rx_dropped++; + } + + re->rx[rx].rxd2 &= ~RX_DMA_DONE; + wmb(); + ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0); + } + + if (max_rx == 0) + tasklet_schedule(&re->rx_tasklet); + else + ramips_fe_int_enable(RAMIPS_RX_DLY_INT); +} + +static void +ramips_eth_tx_housekeeping(unsigned long ptr) +{ + struct net_device *dev = (struct net_device*)ptr; + struct raeth_priv *re = netdev_priv(dev); + + spin_lock(&re->page_lock); + while ((re->tx[re->skb_free_idx].txd2 & TX_DMA_DONE) && + (re->tx_skb[re->skb_free_idx])) { + dev_kfree_skb_irq(re->tx_skb[re->skb_free_idx]); + re->tx_skb[re->skb_free_idx] = 0; + re->skb_free_idx++; + if (re->skb_free_idx >= NUM_TX_DESC) + re->skb_free_idx = 0; + } + spin_unlock(&re->page_lock); + + ramips_fe_int_enable(RAMIPS_TX_DLY_INT); +} + +static void +ramips_eth_timeout(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + + tasklet_schedule(&re->tx_housekeeping_tasklet); +} + +static irqreturn_t +ramips_eth_irq(int irq, void *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS); + + ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS); + + if (fe_int & RAMIPS_RX_DLY_INT) { + ramips_fe_int_disable(RAMIPS_RX_DLY_INT); + tasklet_schedule(&re->rx_tasklet); + } + + if (fe_int & RAMIPS_TX_DLY_INT) { + ramips_fe_int_disable(RAMIPS_TX_DLY_INT); + tasklet_schedule(&re->tx_housekeeping_tasklet); + } + + return IRQ_HANDLED; +} + +static int +ramips_eth_open(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + int err; + + err = request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, + dev->name, dev); + if (err) + return err; + + err = ramips_ring_alloc(re); + if (err) + goto err_free_irq; + + ramips_ring_setup(re); + ramips_hw_set_macaddr(dev->dev_addr); + + ramips_setup_dma(re); + ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) | + (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | + RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS), + RAMIPS_PDMA_GLO_CFG); + ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) & + ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) | + ((re->plat->sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT), + RAMIPS_FE_GLO_CFG); + + tasklet_init(&re->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping, + (unsigned long)dev); + tasklet_init(&re->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev); + + ramips_phy_start(re); + + ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG); + ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE); + ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) & + ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff), + RAMIPS_GDMA1_FWD_CFG); + ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) & + ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN), + RAMIPS_CDMA_CSG_CFG); + ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG); + ramips_fe_wr(1, RAMIPS_FE_RST_GL); + ramips_fe_wr(0, RAMIPS_FE_RST_GL); + + netif_start_queue(dev); + return 0; + + err_free_irq: + free_irq(dev->irq, dev); + return err; +} + +static int +ramips_eth_stop(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + + ramips_fe_wr(ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & + ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN), + RAMIPS_PDMA_GLO_CFG); + + /* disable all interrupts in the hw */ + ramips_fe_wr(0, RAMIPS_FE_INT_ENABLE); + + ramips_phy_stop(re); + free_irq(dev->irq, dev); + netif_stop_queue(dev); + tasklet_kill(&re->tx_housekeeping_tasklet); + tasklet_kill(&re->rx_tasklet); + ramips_ring_cleanup(re); + ramips_ring_free(re); + RADEBUG("ramips_eth: stopped\n"); + return 0; +} + +static int __init +ramips_eth_probe(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + int err; + + BUG_ON(!re->plat->reset_fe); + re->plat->reset_fe(); + net_srandom(jiffies); + memcpy(dev->dev_addr, re->plat->mac, ETH_ALEN); + + ether_setup(dev); + dev->mtu = 1500; + dev->watchdog_timeo = TX_TIMEOUT; + spin_lock_init(&re->page_lock); + spin_lock_init(&re->phy_lock); + + err = ramips_mdio_init(re); + if (err) + return err; + + err = ramips_phy_connect(re); + if (err) + goto err_mdio_cleanup; + + return 0; + +err_mdio_cleanup: + ramips_mdio_cleanup(re); + return err; +} + +static void +ramips_eth_uninit(struct net_device *dev) +{ + struct raeth_priv *re = netdev_priv(dev); + + ramips_phy_disconnect(re); + ramips_mdio_cleanup(re); +} + +static const struct net_device_ops ramips_eth_netdev_ops = { + .ndo_init = ramips_eth_probe, + .ndo_uninit = ramips_eth_uninit, + .ndo_open = ramips_eth_open, + .ndo_stop = ramips_eth_stop, + .ndo_start_xmit = ramips_eth_hard_start_xmit, + .ndo_tx_timeout = ramips_eth_timeout, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int +ramips_eth_plat_probe(struct platform_device *plat) +{ + struct raeth_priv *re; + struct ramips_eth_platform_data *data = plat->dev.platform_data; + struct resource *res; + int err; + + if (!data) { + dev_err(&plat->dev, "no platform data specified\n"); + return -EINVAL; + } + + res = platform_get_resource(plat, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&plat->dev, "no memory resource found\n"); + return -ENXIO; + } + + ramips_fe_base = ioremap_nocache(res->start, res->end - res->start + 1); + if (!ramips_fe_base) + return -ENOMEM; + + ramips_dev = alloc_etherdev(sizeof(struct raeth_priv)); + if (!ramips_dev) { + dev_err(&plat->dev, "alloc_etherdev failed\n"); + err = -ENOMEM; + goto err_unmap; + } + + strcpy(ramips_dev->name, "eth%d"); + ramips_dev->irq = platform_get_irq(plat, 0); + if (ramips_dev->irq < 0) { + dev_err(&plat->dev, "no IRQ resource found\n"); + err = -ENXIO; + goto err_free_dev; + } + ramips_dev->addr_len = ETH_ALEN; + ramips_dev->base_addr = (unsigned long)ramips_fe_base; + ramips_dev->netdev_ops = &ramips_eth_netdev_ops; + + re = netdev_priv(ramips_dev); + + re->netdev = ramips_dev; + re->parent = &plat->dev; + re->speed = data->speed; + re->duplex = data->duplex; + re->rx_fc = data->rx_fc; + re->tx_fc = data->tx_fc; + re->plat = data; + + err = register_netdev(ramips_dev); + if (err) { + dev_err(&plat->dev, "error bringing up device\n"); + goto err_free_dev; + } + + RADEBUG("ramips_eth: loaded\n"); + return 0; + + err_free_dev: + kfree(ramips_dev); + err_unmap: + iounmap(ramips_fe_base); + return err; +} + +static int +ramips_eth_plat_remove(struct platform_device *plat) +{ + unregister_netdev(ramips_dev); + free_netdev(ramips_dev); + RADEBUG("ramips_eth: unloaded\n"); + return 0; +} + +static struct platform_driver ramips_eth_driver = { + .probe = ramips_eth_plat_probe, + .remove = ramips_eth_plat_remove, + .driver = { + .name = "ramips_eth", + .owner = THIS_MODULE, + }, +}; + +static int __init +ramips_eth_init(void) +{ + int ret; + + ret = rt305x_esw_init(); + if (ret) + return ret; + + ret = platform_driver_register(&ramips_eth_driver); + if (ret) { + printk(KERN_ERR + "ramips_eth: Error registering platfom driver!\n"); + goto esw_cleanup; + } + + return 0; + +esw_cleanup: + rt305x_esw_exit(); + return ret; +} + +static void __exit +ramips_eth_cleanup(void) +{ + platform_driver_unregister(&ramips_eth_driver); + rt305x_esw_exit(); +} + +module_init(ramips_eth_init); +module_exit(ramips_eth_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("John Crispin "); +MODULE_DESCRIPTION("ethernet driver for ramips boards");