diff options
Diffstat (limited to 'target/linux/ar71xx')
| -rw-r--r-- | target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c | 135 |
1 files changed, 68 insertions, 67 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c index 08735a99ac..a2b4bfeb30 100644 --- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c @@ -344,6 +344,71 @@ static unsigned char *ag71xx_speed_str(struct ag71xx *ag) return "?"; } +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, 0); + ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0); + + /* 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); +} + +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); +} + +static void ag71xx_hw_stop(struct ag71xx *ag) +{ + /* disable all interrupts */ + ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0); + + ag71xx_dma_reset(ag); +} + void ag71xx_link_adjust(struct ag71xx *ag) { struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); @@ -353,6 +418,7 @@ void ag71xx_link_adjust(struct ag71xx *ag) u32 mii_speed; 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); @@ -405,6 +471,8 @@ void ag71xx_link_adjust(struct ag71xx *ag) 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", @@ -444,54 +512,6 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac) 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, 0); - ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0); - - /* 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) @@ -550,23 +570,6 @@ static void ag71xx_hw_init(struct ag71xx *ag) ag71xx_dma_reset(ag); } -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); -} - -static void ag71xx_hw_stop(struct ag71xx *ag) -{ - /* disable all interrupts */ - ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0); - - ag71xx_dma_reset(ag); -} - static int ag71xx_open(struct net_device *dev) { struct ag71xx *ag = netdev_priv(dev); @@ -586,8 +589,6 @@ static int ag71xx_open(struct net_device *dev) ag71xx_hw_set_macaddr(ag, dev->dev_addr); - ag71xx_hw_start(ag); - netif_start_queue(dev); return 0; |