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path: root/drivers/net/designware.c
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Diffstat (limited to 'drivers/net/designware.c')
-rw-r--r--drivers/net/designware.c128
1 files changed, 90 insertions, 38 deletions
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 1e34436772..e8e669bd90 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -32,6 +32,8 @@
#include <asm/io.h>
#include "designware.h"
+static int configure_phy(struct eth_device *dev);
+
static void tx_descs_init(struct eth_device *dev)
{
struct dw_eth_dev *priv = dev->priv;
@@ -106,16 +108,20 @@ static int mac_reset(struct eth_device *dev)
struct eth_mac_regs *mac_p = priv->mac_regs_p;
struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ ulong start;
int timeout = CONFIG_MACRESET_TIMEOUT;
writel(DMAMAC_SRST, &dma_p->busmode);
writel(MII_PORTSELECT, &mac_p->conf);
- do {
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
if (!(readl(&dma_p->busmode) & DMAMAC_SRST))
return 0;
- udelay(1000);
- } while (timeout--);
+
+ /* Try again after 10usec */
+ udelay(10);
+ };
return -1;
}
@@ -144,10 +150,16 @@ static int dw_eth_init(struct eth_device *dev, bd_t *bis)
struct eth_dma_regs *dma_p = priv->dma_regs_p;
u32 conf;
+ if (priv->phy_configured != 1)
+ configure_phy(dev);
+
/* Reset ethernet hardware */
if (mac_reset(dev) < 0)
return -1;
+ /* Resore the HW MAC address as it has been lost during MAC reset */
+ dw_write_hwaddr(dev);
+
writel(FIXEDBURST | PRIORXTX_41 | BURST_16,
&dma_p->busmode);
@@ -172,8 +184,7 @@ static int dw_eth_init(struct eth_device *dev, bd_t *bis)
writel(readl(&dma_p->opmode) | RXSTART, &dma_p->opmode);
writel(readl(&dma_p->opmode) | TXSTART, &dma_p->opmode);
- writel(readl(&mac_p->conf) | RXENABLE, &mac_p->conf);
- writel(readl(&mac_p->conf) | TXENABLE, &mac_p->conf);
+ writel(readl(&mac_p->conf) | RXENABLE | TXENABLE, &mac_p->conf);
return 0;
}
@@ -266,6 +277,7 @@ static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
{
struct dw_eth_dev *priv = dev->priv;
struct eth_mac_regs *mac_p = priv->mac_regs_p;
+ ulong start;
u32 miiaddr;
int timeout = CONFIG_MDIO_TIMEOUT;
@@ -274,13 +286,16 @@ static int eth_mdio_read(struct eth_device *dev, u8 addr, u8 reg, u16 *val)
writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
- do {
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
*val = readl(&mac_p->miidata);
return 0;
}
- udelay(1000);
- } while (timeout--);
+
+ /* Try again after 10usec */
+ udelay(10);
+ };
return -1;
}
@@ -289,6 +304,7 @@ static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
{
struct dw_eth_dev *priv = dev->priv;
struct eth_mac_regs *mac_p = priv->mac_regs_p;
+ ulong start;
u32 miiaddr;
int ret = -1, timeout = CONFIG_MDIO_TIMEOUT;
u16 value;
@@ -299,11 +315,16 @@ static int eth_mdio_write(struct eth_device *dev, u8 addr, u8 reg, u16 val)
writel(miiaddr | MII_CLKRANGE_150_250M | MII_BUSY, &mac_p->miiaddr);
- do {
- if (!(readl(&mac_p->miiaddr) & MII_BUSY))
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
+ if (!(readl(&mac_p->miiaddr) & MII_BUSY)) {
ret = 0;
- udelay(1000);
- } while (timeout--);
+ break;
+ }
+
+ /* Try again after 10usec */
+ udelay(10);
+ };
/* Needed as a fix for ST-Phy */
eth_mdio_read(dev, addr, reg, &value);
@@ -344,18 +365,23 @@ static int dw_reset_phy(struct eth_device *dev)
{
struct dw_eth_dev *priv = dev->priv;
u16 ctrl;
+ ulong start;
int timeout = CONFIG_PHYRESET_TIMEOUT;
u32 phy_addr = priv->address;
eth_mdio_write(dev, phy_addr, MII_BMCR, BMCR_RESET);
- do {
+
+ start = get_timer(0);
+ while (get_timer(start) < timeout) {
eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl);
if (!(ctrl & BMCR_RESET))
break;
- udelay(1000);
- } while (timeout--);
- if (timeout < 0)
+ /* Try again after 10usec */
+ udelay(10);
+ };
+
+ if (get_timer(start) >= CONFIG_PHYRESET_TIMEOUT)
return -1;
#ifdef CONFIG_PHY_RESET_DELAY
@@ -372,6 +398,7 @@ static int configure_phy(struct eth_device *dev)
#if defined(CONFIG_DW_AUTONEG)
u16 bmsr;
u32 timeout;
+ ulong start;
u16 anlpar, btsr;
#else
u16 ctrl;
@@ -379,7 +406,7 @@ static int configure_phy(struct eth_device *dev)
#if defined(CONFIG_DW_SEARCH_PHY)
phy_addr = find_phy(dev);
- if (phy_addr > 0)
+ if (phy_addr >= 0)
priv->address = phy_addr;
else
return -1;
@@ -390,8 +417,10 @@ static int configure_phy(struct eth_device *dev)
return -1;
#if defined(CONFIG_DW_AUTONEG)
- bmcr = BMCR_ANENABLE | BMCR_ANRESTART | BMCR_SPEED100 | \
- BMCR_FULLDPLX | BMCR_SPEED1000;
+ /* Set Auto-Neg Advertisement capabilities to 10/100 half/full */
+ eth_mdio_write(dev, phy_addr, MII_ADVERTISE, 0x1E1);
+
+ bmcr = BMCR_ANENABLE | BMCR_ANRESTART;
#else
bmcr = BMCR_SPEED100 | BMCR_FULLDPLX;
@@ -408,33 +437,56 @@ static int configure_phy(struct eth_device *dev)
/* Read the phy status register and populate priv structure */
#if defined(CONFIG_DW_AUTONEG)
timeout = CONFIG_AUTONEG_TIMEOUT;
- do {
+ start = get_timer(0);
+
+ while (get_timer(start) < timeout) {
eth_mdio_read(dev, phy_addr, MII_BMSR, &bmsr);
if (bmsr & BMSR_ANEGCOMPLETE)
break;
- udelay(1000);
- } while (timeout--);
+
+ /* Try again after 10usec */
+ udelay(10);
+ };
eth_mdio_read(dev, phy_addr, MII_LPA, &anlpar);
eth_mdio_read(dev, phy_addr, MII_STAT1000, &btsr);
- if (btsr & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
- priv->speed = SPEED_1000M;
- if (btsr & PHY_1000BTSR_1000FD)
+ if (bmsr & BMSR_ANEGCOMPLETE) {
+ if (btsr & PHY_1000BTSR_1000FD) {
+ priv->speed = SPEED_1000M;
+ bmcr |= BMCR_SPEED1000;
priv->duplex = FULL_DUPLEX;
- else
+ bmcr |= BMCR_FULLDPLX;
+ } else if (btsr & PHY_1000BTSR_1000HD) {
+ priv->speed = SPEED_1000M;
+ bmcr |= BMCR_SPEED1000;
priv->duplex = HALF_DUPLEX;
- } else {
- if (anlpar & LPA_100)
+ bmcr &= ~BMCR_FULLDPLX;
+ } else if (anlpar & LPA_100FULL) {
priv->speed = SPEED_100M;
- else
- priv->speed = SPEED_10M;
-
- if (anlpar & (LPA_10FULL | LPA_100FULL))
+ bmcr |= BMCR_SPEED100;
priv->duplex = FULL_DUPLEX;
- else
+ bmcr |= BMCR_FULLDPLX;
+ } else if (anlpar & LPA_100HALF) {
+ priv->speed = SPEED_100M;
+ bmcr |= BMCR_SPEED100;
priv->duplex = HALF_DUPLEX;
- }
+ bmcr &= ~BMCR_FULLDPLX;
+ } else if (anlpar & LPA_10FULL) {
+ priv->speed = SPEED_10M;
+ bmcr &= ~BMCR_SPEED100;
+ priv->duplex = FULL_DUPLEX;
+ bmcr |= BMCR_FULLDPLX;
+ } else {
+ priv->speed = SPEED_10M;
+ bmcr &= ~BMCR_SPEED100;
+ priv->duplex = HALF_DUPLEX;
+ bmcr &= ~BMCR_FULLDPLX;
+ }
+ if (eth_mdio_write(dev, phy_addr, MII_BMCR, bmcr) < 0)
+ return -1;
+ } else
+ return -1;
#else
if (eth_mdio_read(dev, phy_addr, MII_BMCR, &ctrl) < 0)
return -1;
@@ -451,6 +503,8 @@ static int configure_phy(struct eth_device *dev)
else
priv->speed = SPEED_10M;
#endif
+ priv->phy_configured = 1;
+
return 0;
}
@@ -511,14 +565,12 @@ int designware_initialize(u32 id, ulong base_addr, u32 phy_addr)
priv->dma_regs_p = (struct eth_dma_regs *)(base_addr +
DW_DMA_BASE_OFFSET);
priv->address = phy_addr;
+ priv->phy_configured = 0;
if (mac_reset(dev) < 0)
return -1;
- if (configure_phy(dev) < 0) {
- printf("Phy could not be configured\n");
- return -1;
- }
+ configure_phy(dev);
dev->init = dw_eth_init;
dev->send = dw_eth_send;
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