# Makefile for the Ramips SoCs built-in ethernet macs
#
+ramips-y += ramips_main.o
+
obj-$(CONFIG_NET_RAMIPS) += ramips.o
+++ /dev/null
-/*
- * 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 <blogic@openwrt.org>
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/etherdevice.h>
-#include <linux/ethtool.h>
-#include <linux/platform_device.h>
-#include <linux/phy.h>
-
-#include <ramips_eth_platform.h>
-#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 <blogic@openwrt.org>");
-MODULE_DESCRIPTION("ethernet driver for ramips boards");
--- /dev/null
+/*
+ * 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 <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/platform_device.h>
+#include <linux/phy.h>
+
+#include <ramips_eth_platform.h>
+#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 <blogic@openwrt.org>");
+MODULE_DESCRIPTION("ethernet driver for ramips boards");
projects / openwrt / staging / hauke.git / commitdiff