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NET: kirkwood-egiga smi access fix 

Although the datasheet mentions seperate smi registers for each
port, using Port 1 smi register to access ethernet phys does not
work. Hence only Port 0 smi register should be used to access all
devices connected to the smi bus. This behavior is consistant with
the mv643xx driver in the linux kernel.

Signed-off-by: Siddarth Gore <gores@marvell.com>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Siddarth Gore 2010-01-19 11:09:07 +05:30 committed by Ben Warren
parent a1b322a983
commit e66b19ce6d
1 changed files with 7 additions and 6 deletions
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13
drivers/net/kirkwood_egiga.c
View File

@ -39,6 +39,7 @@
#include "kirkwood_egiga.h"
#define KIRKWOOD_PHY_ADR_REQUEST 0xee
#define KWGBE_SMI_REG (((struct kwgbe_registers *)KW_EGIGA0_BASE)->smi)
/*
* smi_reg_read - miiphy_read callback function.
@ -76,7 +77,7 @@ static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
/* wait till the SMI is not busy */
do {
/* read smi register */
smi_reg = KWGBEREG_RD(regs->smi);
smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
if (timeout-- == 0) {
printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
return -EFAULT;
@ -89,14 +90,14 @@ static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
| KWGBE_PHY_SMI_OPCODE_READ;
/* write the smi register */
KWGBEREG_WR(regs->smi, smi_reg);
KWGBEREG_WR(KWGBE_SMI_REG, smi_reg);
/*wait till read value is ready */
timeout = KWGBE_PHY_SMI_TIMEOUT;
do {
/* read smi register */
smi_reg = KWGBEREG_RD(regs->smi);
smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
if (timeout-- == 0) {
printf("Err..(%s) SMI read ready timeout\n",
__FUNCTION__);
@ -107,7 +108,7 @@ static int smi_reg_read(char *devname, u8 phy_adr, u8 reg_ofs, u16 * data)
/* Wait for the data to update in the SMI register */
for (timeout = 0; timeout < KWGBE_PHY_SMI_TIMEOUT; timeout++) ;
*data = (u16) (KWGBEREG_RD(regs->smi) & KWGBE_PHY_SMI_DATA_MASK);
*data = (u16) (KWGBEREG_RD(KWGBE_SMI_REG) & KWGBE_PHY_SMI_DATA_MASK);
debug("%s:(adr %d, off %d) value= %04x\n", __FUNCTION__, phy_adr,
reg_ofs, *data);
@ -150,7 +151,7 @@ static int smi_reg_write(char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
timeout = KWGBE_PHY_SMI_TIMEOUT;
do {
/* read smi register */
smi_reg = KWGBEREG_RD(regs->smi);
smi_reg = KWGBEREG_RD(KWGBE_SMI_REG);
if (timeout-- == 0) {
printf("Err..(%s) SMI busy timeout\n", __FUNCTION__);
return -ETIME;
@ -164,7 +165,7 @@ static int smi_reg_write(char *devname, u8 phy_adr, u8 reg_ofs, u16 data)
smi_reg &= ~KWGBE_PHY_SMI_OPCODE_READ;
/* write the smi register */
KWGBEREG_WR(regs->smi, smi_reg);
KWGBEREG_WR(KWGBE_SMI_REG, smi_reg);
return 0;
}