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authorGabor Juhos <juhosg@openwrt.org>2008-12-01 21:21:36 +0000
committerGabor Juhos <juhosg@openwrt.org>2008-12-01 21:21:36 +0000
commit6d0181c4fb195a013b0e6480e1f48e8ead748320 (patch)
tree2a0bd7df222ad204bdff57ac1ba794db02d460f1 /target/linux
parent9d93e2a4e063b63cabdaa5eb7b0977bc33c0e39a (diff)
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ag71xx driver: reset DMA registers in hardware initialization
SVN-Revision: 13459
Diffstat (limited to 'target/linux')
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h2
-rw-r--r--target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c56
2 files changed, 50 insertions, 8 deletions
diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
index 83f026f0cd..5d97fdf7e9 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h
@@ -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
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 d99d5145d2..81ebe8db0a 100644
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -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)