diff options
Diffstat (limited to 'target/linux/ar71xx/files-2.6.39/drivers/net/ag71xx/ag71xx_main.c')
| -rw-r--r-- | target/linux/ar71xx/files-2.6.39/drivers/net/ag71xx/ag71xx_main.c | 1265 |
1 files changed, 0 insertions, 1265 deletions
diff --git a/target/linux/ar71xx/files-2.6.39/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files-2.6.39/drivers/net/ag71xx/ag71xx_main.c deleted file mode 100644 index 3ebf4b171e..0000000000 --- a/target/linux/ar71xx/files-2.6.39/drivers/net/ag71xx/ag71xx_main.c +++ /dev/null @@ -1,1265 +0,0 @@ -/* - * Atheros AR71xx built-in ethernet mac driver - * - * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> - * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> - * - * Based on Atheros' AG7100 driver - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - */ - -#include "ag71xx.h" - -#define AG71XX_DEFAULT_MSG_ENABLE \ - (NETIF_MSG_DRV \ - | NETIF_MSG_PROBE \ - | NETIF_MSG_LINK \ - | NETIF_MSG_TIMER \ - | NETIF_MSG_IFDOWN \ - | NETIF_MSG_IFUP \ - | NETIF_MSG_RX_ERR \ - | NETIF_MSG_TX_ERR) - -static int ag71xx_msg_level = -1; - -module_param_named(msg_level, ag71xx_msg_level, int, 0); -MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); - -static void ag71xx_dump_dma_regs(struct ag71xx *ag) -{ - DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_TX_CTRL), - ag71xx_rr(ag, AG71XX_REG_TX_DESC), - ag71xx_rr(ag, AG71XX_REG_TX_STATUS)); - - DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_RX_CTRL), - ag71xx_rr(ag, AG71XX_REG_RX_DESC), - ag71xx_rr(ag, AG71XX_REG_RX_STATUS)); -} - -static void ag71xx_dump_regs(struct ag71xx *ag) -{ - DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_MAC_CFG1), - ag71xx_rr(ag, AG71XX_REG_MAC_CFG2), - ag71xx_rr(ag, AG71XX_REG_MAC_IPG), - ag71xx_rr(ag, AG71XX_REG_MAC_HDX), - ag71xx_rr(ag, AG71XX_REG_MAC_MFL)); - DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL), - ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1), - ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2)); - DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2)); - DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5)); -} - -static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr) -{ - DBG("%s: %s intr=%08x %s%s%s%s%s%s\n", - ag->dev->name, label, intr, - (intr & AG71XX_INT_TX_PS) ? "TXPS " : "", - (intr & AG71XX_INT_TX_UR) ? "TXUR " : "", - (intr & AG71XX_INT_TX_BE) ? "TXBE " : "", - (intr & AG71XX_INT_RX_PR) ? "RXPR " : "", - (intr & AG71XX_INT_RX_OF) ? "RXOF " : "", - (intr & AG71XX_INT_RX_BE) ? "RXBE " : ""); -} - -static void ag71xx_ring_free(struct ag71xx_ring *ring) -{ - kfree(ring->buf); - - if (ring->descs_cpu) - dma_free_coherent(NULL, ring->size * ring->desc_size, - ring->descs_cpu, ring->descs_dma); -} - -static int ag71xx_ring_alloc(struct ag71xx_ring *ring) -{ - int err; - int i; - - ring->desc_size = sizeof(struct ag71xx_desc); - if (ring->desc_size % cache_line_size()) { - DBG("ag71xx: ring %p, desc size %u rounded to %u\n", - ring, ring->desc_size, - roundup(ring->desc_size, cache_line_size())); - ring->desc_size = roundup(ring->desc_size, cache_line_size()); - } - - ring->descs_cpu = dma_alloc_coherent(NULL, ring->size * ring->desc_size, - &ring->descs_dma, GFP_ATOMIC); - if (!ring->descs_cpu) { - err = -ENOMEM; - goto err; - } - - - ring->buf = kzalloc(ring->size * sizeof(*ring->buf), GFP_KERNEL); - if (!ring->buf) { - err = -ENOMEM; - goto err; - } - - for (i = 0; i < ring->size; i++) { - int idx = i * ring->desc_size; - ring->buf[i].desc = (struct ag71xx_desc *)&ring->descs_cpu[idx]; - DBG("ag71xx: ring %p, desc %d at %p\n", - ring, i, ring->buf[i].desc); - } - - return 0; - -err: - return err; -} - -static void ag71xx_ring_tx_clean(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->tx_ring; - struct net_device *dev = ag->dev; - - while (ring->curr != ring->dirty) { - u32 i = ring->dirty % ring->size; - - if (!ag71xx_desc_empty(ring->buf[i].desc)) { - ring->buf[i].desc->ctrl = 0; - dev->stats.tx_errors++; - } - - if (ring->buf[i].skb) - dev_kfree_skb_any(ring->buf[i].skb); - - ring->buf[i].skb = NULL; - - ring->dirty++; - } - - /* flush descriptors */ - wmb(); - -} - -static void ag71xx_ring_tx_init(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->tx_ring; - int i; - - for (i = 0; i < ring->size; i++) { - ring->buf[i].desc->next = (u32) (ring->descs_dma + - ring->desc_size * ((i + 1) % ring->size)); - - ring->buf[i].desc->ctrl = DESC_EMPTY; - ring->buf[i].skb = NULL; - } - - /* flush descriptors */ - wmb(); - - ring->curr = 0; - ring->dirty = 0; -} - -static void ag71xx_ring_rx_clean(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->rx_ring; - int i; - - if (!ring->buf) - return; - - for (i = 0; i < ring->size; i++) - if (ring->buf[i].skb) { - dma_unmap_single(&ag->dev->dev, ring->buf[i].dma_addr, - AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE); - kfree_skb(ring->buf[i].skb); - } -} - -static int ag71xx_rx_reserve(struct ag71xx *ag) -{ - int reserve = 0; - - if (ag71xx_get_pdata(ag)->is_ar724x) { - if (!ag71xx_has_ar8216(ag)) - reserve = 2; - - if (ag->phy_dev) - reserve += 4 - (ag->phy_dev->pkt_align % 4); - - reserve %= 4; - } - - return reserve + AG71XX_RX_PKT_RESERVE; -} - - -static int ag71xx_ring_rx_init(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->rx_ring; - unsigned int reserve = ag71xx_rx_reserve(ag); - unsigned int i; - int ret; - - ret = 0; - for (i = 0; i < ring->size; i++) { - ring->buf[i].desc->next = (u32) (ring->descs_dma + - ring->desc_size * ((i + 1) % ring->size)); - - DBG("ag71xx: RX desc at %p, next is %08x\n", - ring->buf[i].desc, - ring->buf[i].desc->next); - } - - for (i = 0; i < ring->size; i++) { - struct sk_buff *skb; - dma_addr_t dma_addr; - - skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + reserve); - if (!skb) { - ret = -ENOMEM; - break; - } - - skb->dev = ag->dev; - skb_reserve(skb, reserve); - - dma_addr = dma_map_single(&ag->dev->dev, skb->data, - AG71XX_RX_PKT_SIZE, - DMA_FROM_DEVICE); - ring->buf[i].skb = skb; - ring->buf[i].dma_addr = dma_addr; - ring->buf[i].desc->data = (u32) dma_addr; - ring->buf[i].desc->ctrl = DESC_EMPTY; - } - - /* flush descriptors */ - wmb(); - - ring->curr = 0; - ring->dirty = 0; - - return ret; -} - -static int ag71xx_ring_rx_refill(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->rx_ring; - unsigned int reserve = ag71xx_rx_reserve(ag); - unsigned int count; - - count = 0; - for (; ring->curr - ring->dirty > 0; ring->dirty++) { - unsigned int i; - - i = ring->dirty % ring->size; - - if (ring->buf[i].skb == NULL) { - dma_addr_t dma_addr; - struct sk_buff *skb; - - skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE + reserve); - if (skb == NULL) - break; - - skb_reserve(skb, reserve); - skb->dev = ag->dev; - - dma_addr = dma_map_single(&ag->dev->dev, skb->data, - AG71XX_RX_PKT_SIZE, - DMA_FROM_DEVICE); - - ring->buf[i].skb = skb; - ring->buf[i].dma_addr = dma_addr; - ring->buf[i].desc->data = (u32) dma_addr; - } - - ring->buf[i].desc->ctrl = DESC_EMPTY; - count++; - } - - /* flush descriptors */ - wmb(); - - DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count); - - return count; -} - -static int ag71xx_rings_init(struct ag71xx *ag) -{ - int ret; - - ret = ag71xx_ring_alloc(&ag->tx_ring); - if (ret) - return ret; - - ag71xx_ring_tx_init(ag); - - ret = ag71xx_ring_alloc(&ag->rx_ring); - if (ret) - return ret; - - ret = ag71xx_ring_rx_init(ag); - return ret; -} - -static void ag71xx_rings_cleanup(struct ag71xx *ag) -{ - ag71xx_ring_rx_clean(ag); - ag71xx_ring_free(&ag->rx_ring); - - ag71xx_ring_tx_clean(ag); - ag71xx_ring_free(&ag->tx_ring); -} - -static unsigned char *ag71xx_speed_str(struct ag71xx *ag) -{ - switch (ag->speed) { - case SPEED_1000: - return "1000"; - case SPEED_100: - return "100"; - case SPEED_10: - return "10"; - } - - return "?"; -} - -static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac) -{ - u32 t; - - t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16) - | (((u32) mac[3]) << 8) | ((u32) mac[2]); - - ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t); - - t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16); - ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t); -} - -static void ag71xx_dma_reset(struct ag71xx *ag) -{ - u32 val; - int i; - - ag71xx_dump_dma_regs(ag); - - /* stop RX and TX */ - ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); - ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); - - /* - * give the hardware some time to really stop all rx/tx activity - * clearing the descriptors too early causes random memory corruption - */ - mdelay(1); - - /* clear descriptor addresses */ - ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma); - ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma); - - /* clear pending RX/TX interrupts */ - for (i = 0; i < 256; i++) { - ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); - ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); - } - - /* clear pending errors */ - ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF); - ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR); - - val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); - if (val) - printk(KERN_ALERT "%s: unable to clear DMA Rx status: %08x\n", - ag->dev->name, val); - - val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); - - /* mask out reserved bits */ - val &= ~0xff000000; - - if (val) - printk(KERN_ALERT "%s: unable to clear DMA Tx status: %08x\n", - ag->dev->name, val); - - ag71xx_dump_dma_regs(ag); -} - -#define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \ - MAC_CFG1_SRX | MAC_CFG1_STX) - -#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT) - -#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \ - FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \ - FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \ - FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \ - FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \ - FIFO_CFG4_VT) - -#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \ - FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \ - FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \ - FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \ - FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \ - FIFO_CFG5_17 | FIFO_CFG5_SF) - -static void ag71xx_hw_stop(struct ag71xx *ag) -{ - /* disable all interrupts and stop the rx/tx engine */ - ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0); - ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); - ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); -} - -static void ag71xx_hw_setup(struct ag71xx *ag) -{ - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - - /* setup MAC configuration registers */ - ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT); - - ag71xx_sb(ag, AG71XX_REG_MAC_CFG2, - MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK); - - /* setup max frame length */ - ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN); - - /* setup FIFO configuration registers */ - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT); - if (pdata->is_ar724x) { - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, pdata->fifo_cfg1); - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, pdata->fifo_cfg2); - } else { - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000); - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff); - } - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT); - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT); -} - -static void ag71xx_hw_init(struct ag71xx *ag) -{ - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - u32 reset_mask = pdata->reset_bit; - - ag71xx_hw_stop(ag); - - if (pdata->is_ar724x) { - u32 reset_phy = reset_mask; - - reset_phy &= RESET_MODULE_GE0_PHY | RESET_MODULE_GE1_PHY; - reset_mask &= ~(RESET_MODULE_GE0_PHY | RESET_MODULE_GE1_PHY); - - ar71xx_device_stop(reset_phy); - mdelay(50); - ar71xx_device_start(reset_phy); - mdelay(200); - } - - ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR); - udelay(20); - - ar71xx_device_stop(reset_mask); - mdelay(100); - ar71xx_device_start(reset_mask); - mdelay(200); - - ag71xx_hw_setup(ag); - - ag71xx_dma_reset(ag); -} - -static void ag71xx_fast_reset(struct ag71xx *ag) -{ - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - struct net_device *dev = ag->dev; - u32 reset_mask = pdata->reset_bit; - u32 rx_ds, tx_ds; - u32 mii_reg; - - reset_mask &= RESET_MODULE_GE0_MAC | RESET_MODULE_GE1_MAC; - - mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG); - rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC); - tx_ds = ag71xx_rr(ag, AG71XX_REG_TX_DESC); - - ar71xx_device_stop(reset_mask); - udelay(10); - ar71xx_device_start(reset_mask); - udelay(10); - - ag71xx_dma_reset(ag); - ag71xx_hw_setup(ag); - - ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds); - ag71xx_wr(ag, AG71XX_REG_TX_DESC, tx_ds); - ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg); - - ag71xx_hw_set_macaddr(ag, dev->dev_addr); -} - -static void ag71xx_hw_start(struct ag71xx *ag) -{ - /* start RX engine */ - ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); - - /* enable interrupts */ - ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT); -} - -void ag71xx_link_adjust(struct ag71xx *ag) -{ - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - u32 cfg2; - u32 ifctl; - u32 fifo5; - - if (!ag->link) { - ag71xx_hw_stop(ag); - netif_carrier_off(ag->dev); - if (netif_msg_link(ag)) - printk(KERN_INFO "%s: link down\n", ag->dev->name); - return; - } - - if (pdata->is_ar724x) - ag71xx_fast_reset(ag); - - cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2); - cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX); - cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0; - - ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL); - ifctl &= ~(MAC_IFCTL_SPEED); - - fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5); - fifo5 &= ~FIFO_CFG5_BM; - - switch (ag->speed) { - case SPEED_1000: - cfg2 |= MAC_CFG2_IF_1000; - fifo5 |= FIFO_CFG5_BM; - break; - case SPEED_100: - cfg2 |= MAC_CFG2_IF_10_100; - ifctl |= MAC_IFCTL_SPEED; - break; - case SPEED_10: - cfg2 |= MAC_CFG2_IF_10_100; - break; - default: - BUG(); - return; - } - - if (pdata->is_ar91xx) - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff); - else if (pdata->is_ar724x) - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3); - else - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff); - - if (pdata->set_speed) - pdata->set_speed(ag->speed); - - ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2); - ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5); - ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl); - ag71xx_hw_start(ag); - - netif_carrier_on(ag->dev); - if (netif_msg_link(ag)) - printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n", - ag->dev->name, - ag71xx_speed_str(ag), - (DUPLEX_FULL == ag->duplex) ? "Full" : "Half"); - - DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2)); - - DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4), - ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5)); - - DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n", - ag->dev->name, - ag71xx_rr(ag, AG71XX_REG_MAC_CFG2), - ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL), - ag71xx_mii_ctrl_rr(ag)); -} - -static int ag71xx_open(struct net_device *dev) -{ - struct ag71xx *ag = netdev_priv(dev); - int ret; - - ret = ag71xx_rings_init(ag); - if (ret) - goto err; - - napi_enable(&ag->napi); - - netif_carrier_off(dev); - ag71xx_phy_start(ag); - - ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma); - ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma); - - ag71xx_hw_set_macaddr(ag, dev->dev_addr); - - netif_start_queue(dev); - - return 0; - -err: - ag71xx_rings_cleanup(ag); - return ret; -} - -static int ag71xx_stop(struct net_device *dev) -{ - struct ag71xx *ag = netdev_priv(dev); - unsigned long flags; - - netif_carrier_off(dev); - ag71xx_phy_stop(ag); - - spin_lock_irqsave(&ag->lock, flags); - - netif_stop_queue(dev); - - ag71xx_hw_stop(ag); - ag71xx_dma_reset(ag); - - napi_disable(&ag->napi); - del_timer_sync(&ag->oom_timer); - - spin_unlock_irqrestore(&ag->lock, flags); - - ag71xx_rings_cleanup(ag); - - return 0; -} - -static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb, - struct net_device *dev) -{ - struct ag71xx *ag = netdev_priv(dev); - struct ag71xx_ring *ring = &ag->tx_ring; - struct ag71xx_desc *desc; - dma_addr_t dma_addr; - int i; - - i = ring->curr % ring->size; - desc = ring->buf[i].desc; - - if (!ag71xx_desc_empty(desc)) - goto err_drop; - - if (ag71xx_has_ar8216(ag)) - ag71xx_add_ar8216_header(ag, skb); - - if (skb->len <= 0) { - DBG("%s: packet len is too small\n", ag->dev->name); - goto err_drop; - } - - dma_addr = dma_map_single(&dev->dev, skb->data, skb->len, - DMA_TO_DEVICE); - - ring->buf[i].skb = skb; - ring->buf[i].timestamp = jiffies; - - /* setup descriptor fields */ - desc->data = (u32) dma_addr; - desc->ctrl = (skb->len & DESC_PKTLEN_M); - - /* flush descriptor */ - wmb(); - - ring->curr++; - if (ring->curr == (ring->dirty + ring->size)) { - DBG("%s: tx queue full\n", ag->dev->name); - netif_stop_queue(dev); - } - - DBG("%s: packet injected into TX queue\n", ag->dev->name); - - /* enable TX engine */ - ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE); - - return NETDEV_TX_OK; - -err_drop: - dev->stats.tx_dropped++; - - dev_kfree_skb(skb); - return NETDEV_TX_OK; -} - -static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - struct ag71xx *ag = netdev_priv(dev); - int ret; - - switch (cmd) { - case SIOCETHTOOL: - if (ag->phy_dev == NULL) - break; - - spin_lock_irq(&ag->lock); - ret = phy_ethtool_ioctl(ag->phy_dev, (void *) ifr->ifr_data); - spin_unlock_irq(&ag->lock); - return ret; - - case SIOCSIFHWADDR: - if (copy_from_user - (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr))) - return -EFAULT; - return 0; - - case SIOCGIFHWADDR: - if (copy_to_user - (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr))) - return -EFAULT; - return 0; - - case SIOCGMIIPHY: - case SIOCGMIIREG: - case SIOCSMIIREG: - if (ag->phy_dev == NULL) - break; - - return phy_mii_ioctl(ag->phy_dev, ifr, cmd); - - default: - break; - } - - return -EOPNOTSUPP; -} - -static void ag71xx_oom_timer_handler(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct ag71xx *ag = netdev_priv(dev); - - napi_schedule(&ag->napi); -} - -static void ag71xx_tx_timeout(struct net_device *dev) -{ - struct ag71xx *ag = netdev_priv(dev); - - if (netif_msg_tx_err(ag)) - printk(KERN_DEBUG "%s: tx timeout\n", ag->dev->name); - - schedule_work(&ag->restart_work); -} - -static void ag71xx_restart_work_func(struct work_struct *work) -{ - struct ag71xx *ag = container_of(work, struct ag71xx, restart_work); - - if (ag71xx_get_pdata(ag)->is_ar724x) { - ag->link = 0; - ag71xx_link_adjust(ag); - return; - } - - ag71xx_stop(ag->dev); - ag71xx_open(ag->dev); -} - -static bool ag71xx_check_dma_stuck(struct ag71xx *ag, unsigned long timestamp) -{ - u32 rx_sm, tx_sm, rx_fd; - - if (likely(time_before(jiffies, timestamp + HZ/10))) - return false; - - if (!netif_carrier_ok(ag->dev)) - return false; - - rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM); - if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6) - return true; - - tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM); - rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH); - if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) && - ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0) - return true; - - return false; -} - -static int ag71xx_tx_packets(struct ag71xx *ag) -{ - struct ag71xx_ring *ring = &ag->tx_ring; - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - int sent; - - DBG("%s: processing TX ring\n", ag->dev->name); - - sent = 0; - while (ring->dirty != ring->curr) { - unsigned int i = ring->dirty % ring->size; - struct ag71xx_desc *desc = ring->buf[i].desc; - struct sk_buff *skb = ring->buf[i].skb; - - if (!ag71xx_desc_empty(desc)) { - if (pdata->is_ar7240 && - ag71xx_check_dma_stuck(ag, ring->buf[i].timestamp)) - schedule_work(&ag->restart_work); - break; - } - - ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); - - ag->dev->stats.tx_bytes += skb->len; - ag->dev->stats.tx_packets++; - - dev_kfree_skb_any(skb); - ring->buf[i].skb = NULL; - - ring->dirty++; - sent++; - } - - DBG("%s: %d packets sent out\n", ag->dev->name, sent); - - if ((ring->curr - ring->dirty) < (ring->size * 3) / 4) - netif_wake_queue(ag->dev); - - return sent; -} - -static int ag71xx_rx_packets(struct ag71xx *ag, int limit) -{ - struct net_device *dev = ag->dev; - struct ag71xx_ring *ring = &ag->rx_ring; - int done = 0; - - DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n", - dev->name, limit, ring->curr, ring->dirty); - - while (done < limit) { - unsigned int i = ring->curr % ring->size; - struct ag71xx_desc *desc = ring->buf[i].desc; - struct sk_buff *skb; - int pktlen; - int err = 0; - - if (ag71xx_desc_empty(desc)) - break; - - if ((ring->dirty + ring->size) == ring->curr) { - ag71xx_assert(0); - break; - } - - ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); - - skb = ring->buf[i].skb; - pktlen = ag71xx_desc_pktlen(desc); - pktlen -= ETH_FCS_LEN; - - dma_unmap_single(&dev->dev, ring->buf[i].dma_addr, - AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE); - - dev->last_rx = jiffies; - dev->stats.rx_packets++; - dev->stats.rx_bytes += pktlen; - - skb_put(skb, pktlen); - if (ag71xx_has_ar8216(ag)) - err = ag71xx_remove_ar8216_header(ag, skb, pktlen); - - if (err) { - dev->stats.rx_dropped++; - kfree_skb(skb); - } else { - skb->dev = dev; - skb->ip_summed = CHECKSUM_NONE; - if (ag->phy_dev) { - ag->phy_dev->netif_receive_skb(skb); - } else { - skb->protocol = eth_type_trans(skb, dev); - netif_receive_skb(skb); - } - } - - ring->buf[i].skb = NULL; - done++; - - ring->curr++; - } - - ag71xx_ring_rx_refill(ag); - - DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n", - dev->name, ring->curr, ring->dirty, done); - - return done; -} - -static int ag71xx_poll(struct napi_struct *napi, int limit) -{ - struct ag71xx *ag = container_of(napi, struct ag71xx, napi); - struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); - struct net_device *dev = ag->dev; - struct ag71xx_ring *rx_ring; - unsigned long flags; - u32 status; - int tx_done; - int rx_done; - - pdata->ddr_flush(); - tx_done = ag71xx_tx_packets(ag); - - DBG("%s: processing RX ring\n", dev->name); - rx_done = ag71xx_rx_packets(ag, limit); - - ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done); - - rx_ring = &ag->rx_ring; - if (rx_ring->buf[rx_ring->dirty % rx_ring->size].skb == NULL) - goto oom; - - status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); - if (unlikely(status & RX_STATUS_OF)) { - ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF); - dev->stats.rx_fifo_errors++; - - /* restart RX */ - ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); - } - - if (rx_done < limit) { - if (status & RX_STATUS_PR) - goto more; - - status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); - if (status & TX_STATUS_PS) - goto more; - - DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n", - dev->name, rx_done, tx_done, limit); - - napi_complete(napi); - - /* enable interrupts */ - spin_lock_irqsave(&ag->lock, flags); - ag71xx_int_enable(ag, AG71XX_INT_POLL); - spin_unlock_irqrestore(&ag->lock, flags); - return rx_done; - } - -more: - DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n", - dev->name, rx_done, tx_done, limit); - return rx_done; - -oom: - if (netif_msg_rx_err(ag)) - printk(KERN_DEBUG "%s: out of memory\n", dev->name); - - mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL); - napi_complete(napi); - return 0; -} - -static irqreturn_t ag71xx_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct ag71xx *ag = netdev_priv(dev); - u32 status; - - status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS); - ag71xx_dump_intr(ag, "raw", status); - - if (unlikely(!status)) - return IRQ_NONE; - - if (unlikely(status & AG71XX_INT_ERR)) { - if (status & AG71XX_INT_TX_BE) { - ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE); - dev_err(&dev->dev, "TX BUS error\n"); - } - if (status & AG71XX_INT_RX_BE) { - ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE); - dev_err(&dev->dev, "RX BUS error\n"); - } - } - - if (likely(status & AG71XX_INT_POLL)) { - ag71xx_int_disable(ag, AG71XX_INT_POLL); - DBG("%s: enable polling mode\n", dev->name); - napi_schedule(&ag->napi); - } - - ag71xx_debugfs_update_int_stats(ag, status); - - return IRQ_HANDLED; -} - -static void ag71xx_set_multicast_list(struct net_device *dev) -{ - /* TODO */ -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * Polling 'interrupt' - used by things like netconsole to send skbs - * without having to re-enable interrupts. It's not called while - * the interrupt routine is executing. - */ -static void ag71xx_netpoll(struct net_device *dev) -{ - disable_irq(dev->irq); - ag71xx_interrupt(dev->irq, dev); - enable_irq(dev->irq); -} -#endif - -static const struct net_device_ops ag71xx_netdev_ops = { - .ndo_open = ag71xx_open, - .ndo_stop = ag71xx_stop, - .ndo_start_xmit = ag71xx_hard_start_xmit, - .ndo_set_multicast_list = ag71xx_set_multicast_list, - .ndo_do_ioctl = ag71xx_do_ioctl, - .ndo_tx_timeout = ag71xx_tx_timeout, - .ndo_change_mtu = eth_change_mtu, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = ag71xx_netpoll, -#endif -}; - -static int __devinit ag71xx_probe(struct platform_device *pdev) -{ - struct net_device *dev; - struct resource *res; - struct ag71xx *ag; - struct ag71xx_platform_data *pdata; - int err; - - pdata = pdev->dev.platform_data; - if (!pdata) { - dev_err(&pdev->dev, "no platform data specified\n"); - err = -ENXIO; - goto err_out; - } - - if (pdata->mii_bus_dev == NULL) { - dev_err(&pdev->dev, "no MII bus device specified\n"); - err = -EINVAL; - goto err_out; - } - - dev = alloc_etherdev(sizeof(*ag)); - if (!dev) { - dev_err(&pdev->dev, "alloc_etherdev failed\n"); - err = -ENOMEM; - goto err_out; - } - - SET_NETDEV_DEV(dev, &pdev->dev); - - ag = netdev_priv(dev); - ag->pdev = pdev; - ag->dev = dev; - ag->msg_enable = netif_msg_init(ag71xx_msg_level, - AG71XX_DEFAULT_MSG_ENABLE); - spin_lock_init(&ag->lock); - - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mac_base"); - if (!res) { - dev_err(&pdev->dev, "no mac_base resource found\n"); - err = -ENXIO; - goto err_out; - } - - ag->mac_base = ioremap_nocache(res->start, res->end - res->start + 1); - if (!ag->mac_base) { - dev_err(&pdev->dev, "unable to ioremap mac_base\n"); - err = -ENOMEM; - goto err_free_dev; - } - - dev->irq = platform_get_irq(pdev, 0); - err = request_irq(dev->irq, ag71xx_interrupt, - IRQF_DISABLED, - dev->name, dev); - if (err) { - dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq); - goto err_unmap_base; - } - - dev->base_addr = (unsigned long)ag->mac_base; - dev->netdev_ops = &ag71xx_netdev_ops; - dev->ethtool_ops = &ag71xx_ethtool_ops; - - INIT_WORK(&ag->restart_work, ag71xx_restart_work_func); - - init_timer(&ag->oom_timer); - ag->oom_timer.data = (unsigned long) dev; - ag->oom_timer.function = ag71xx_oom_timer_handler; - - ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT; - ag->rx_ring.size = AG71XX_RX_RING_SIZE_DEFAULT; - - ag->stop_desc = dma_alloc_coherent(NULL, - sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL); - - if (!ag->stop_desc) - goto err_free_irq; - - ag->stop_desc->data = 0; - ag->stop_desc->ctrl = 0; - ag->stop_desc->next = (u32) ag->stop_desc_dma; - - memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN); - - netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT); - - err = register_netdev(dev); - if (err) { - dev_err(&pdev->dev, "unable to register net device\n"); - goto err_free_desc; - } - - printk(KERN_INFO "%s: Atheros AG71xx at 0x%08lx, irq %d\n", - dev->name, dev->base_addr, dev->irq); - - ag71xx_dump_regs(ag); - - ag71xx_hw_init(ag); - - ag71xx_dump_regs(ag); - - err = ag71xx_phy_connect(ag); - if (err) - goto err_unregister_netdev; - - err = ag71xx_debugfs_init(ag); - if (err) - goto err_phy_disconnect; - - platform_set_drvdata(pdev, dev); - - return 0; - -err_phy_disconnect: - ag71xx_phy_disconnect(ag); -err_unregister_netdev: - unregister_netdev(dev); -err_free_desc: - dma_free_coherent(NULL, sizeof(struct ag71xx_desc), ag->stop_desc, - ag->stop_desc_dma); -err_free_irq: - free_irq(dev->irq, dev); -err_unmap_base: - iounmap(ag->mac_base); -err_free_dev: - kfree(dev); -err_out: - platform_set_drvdata(pdev, NULL); - return err; -} - -static int __devexit ag71xx_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - - if (dev) { - struct ag71xx *ag = netdev_priv(dev); - - ag71xx_debugfs_exit(ag); - ag71xx_phy_disconnect(ag); - unregister_netdev(dev); - free_irq(dev->irq, dev); - iounmap(ag->mac_base); - kfree(dev); - platform_set_drvdata(pdev, NULL); - } - - return 0; -} - -static struct platform_driver ag71xx_driver = { - .probe = ag71xx_probe, - .remove = __exit_p(ag71xx_remove), - .driver = { - .name = AG71XX_DRV_NAME, - } -}; - -static int __init ag71xx_module_init(void) -{ - int ret; - - ret = ag71xx_debugfs_root_init(); - if (ret) - goto err_out; - - ret = ag71xx_mdio_driver_init(); - if (ret) - goto err_debugfs_exit; - - ret = platform_driver_register(&ag71xx_driver); - if (ret) - goto err_mdio_exit; - - return 0; - -err_mdio_exit: - ag71xx_mdio_driver_exit(); -err_debugfs_exit: - ag71xx_debugfs_root_exit(); -err_out: - return ret; -} - -static void __exit ag71xx_module_exit(void) -{ - platform_driver_unregister(&ag71xx_driver); - ag71xx_mdio_driver_exit(); - ag71xx_debugfs_root_exit(); -} - -module_init(ag71xx_module_init); -module_exit(ag71xx_module_exit); - -MODULE_VERSION(AG71XX_DRV_VERSION); -MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); -MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:" AG71XX_DRV_NAME); |