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ag71xx driver: reset DMA registers in hardware initialization

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SVN-Revision: 13459
This commit is contained in:
Gabor Juhos 2008-12-01 21:21:36 +00:00
parent 9d93e2a4e0
commit 6d0181c4fb
2 changed files with 50 additions and 8 deletions
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2
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
View File

@ -37,7 +37,7 @@
#define ETH_FCS_LEN 4
#define AG71XX_DRV_NAME "ag71xx"
#define AG71XX_DRV_VERSION "0.5.3"
#define AG71XX_DRV_VERSION "0.5.4"
#define AG71XX_NAPI_TX 1

56
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
View File

@ -28,6 +28,21 @@ static int ag71xx_debug = -1;
module_param(ag71xx_debug, int, 0);
MODULE_PARM_DESC(ag71xx_debug, "Debug 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",
@ -276,6 +291,33 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
static void ag71xx_dma_reset(struct ag71xx *ag)
{
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);
/* 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);
ag71xx_dump_dma_regs(ag);
}
static void ag71xx_hw_init(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
@ -288,9 +330,6 @@ static void ag71xx_hw_init(struct ag71xx *ag)
ar71xx_device_start(pdata->reset_bit);
mdelay(100);
/* setup MII interface type */
ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
/* setup MAC configuration registers */
ag71xx_wr(ag, AG71XX_REG_MAC_CFG1,
pdata->is_ar91xx ? AR91XX_MAC_CFG1_INIT : AR71XX_MAC_CFG1_INIT);
@ -300,6 +339,9 @@ static void ag71xx_hw_init(struct ag71xx *ag)
/* setup max frame length */
ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
/* setup MII interface type */
ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
/* setup FIFO configuration registers */
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
@ -308,6 +350,8 @@ static void ag71xx_hw_init(struct ag71xx *ag)
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5,
pdata->is_ar91xx ? AR91XX_FIFO_CFG5_INIT
: AR71XX_FIFO_CFG5_INIT);
ag71xx_dma_reset(ag);
}
static void ag71xx_hw_start(struct ag71xx *ag)
@ -321,12 +365,10 @@ static void ag71xx_hw_start(struct ag71xx *ag)
static void ag71xx_hw_stop(struct ag71xx *ag)
{
/* stop RX and TX */
ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
/* disable all interrupts */
ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
ag71xx_dma_reset(ag);
}
static int ag71xx_open(struct net_device *dev)