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generic: rtl8366: add rtl8366_smi_write_reg_noack helper

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After issuing a soft reset on the RT8366{S,RB}
switch, waiting for the last acknowlegement fails
in rtl8366_smi_write_reg. Add a _noack version of
the function and use that for issuing a soft reset.

SVN-Revision: 29844
This commit is contained in:
Gabor Juhos 2012-01-21 22:44:09 +00:00
parent 26d4e1876c
commit 4625c9b5a4
4 changed files with 28 additions and 6 deletions
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25
target/linux/generic/files/drivers/net/phy/rtl8366_smi.c
View file

@ -157,6 +157,12 @@ static int rtl8366_smi_write_byte(struct rtl8366_smi *smi, u8 data)
return rtl8366_smi_wait_for_ack(smi);
}
static int rtl8366_smi_write_byte_noack(struct rtl8366_smi *smi, u8 data)
{
rtl8366_smi_write_bits(smi, data, 8);
return 0;
}
static int rtl8366_smi_read_byte0(struct rtl8366_smi *smi, u8 *data)
{
u32 t;
@ -228,7 +234,8 @@ int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data)
}
EXPORT_SYMBOL_GPL(rtl8366_smi_read_reg);
int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
static int __rtl8366_smi_write_reg(struct rtl8366_smi *smi,
u32 addr, u32 data, bool ack)
{
unsigned long flags;
int ret;
@ -258,7 +265,10 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
goto out;
/* write DATA[15:8] */
ret = rtl8366_smi_write_byte(smi, data >> 8);
if (ack)
ret = rtl8366_smi_write_byte(smi, data >> 8);
else
ret = rtl8366_smi_write_byte_noack(smi, data >> 8);
if (ret)
goto out;
@ -270,8 +280,19 @@ int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
return ret;
}
int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data)
{
return __rtl8366_smi_write_reg(smi, addr, data, true);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg);
int rtl8366_smi_write_reg_noack(struct rtl8366_smi *smi, u32 addr, u32 data)
{
return __rtl8366_smi_write_reg(smi, addr, data, false);
}
EXPORT_SYMBOL_GPL(rtl8366_smi_write_reg_noack);
int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data)
{
u32 t;

1
target/linux/generic/files/drivers/net/phy/rtl8366_smi.h
View file

@ -103,6 +103,7 @@ struct rtl8366_smi *rtl8366_smi_alloc(struct device *parent);
int rtl8366_smi_init(struct rtl8366_smi *smi);
void rtl8366_smi_cleanup(struct rtl8366_smi *smi);
int rtl8366_smi_write_reg(struct rtl8366_smi *smi, u32 addr, u32 data);
int rtl8366_smi_write_reg_noack(struct rtl8366_smi *smi, u32 addr, u32 data);
int rtl8366_smi_read_reg(struct rtl8366_smi *smi, u32 addr, u32 *data);
int rtl8366_smi_rmwr(struct rtl8366_smi *smi, u32 addr, u32 mask, u32 data);

4
target/linux/generic/files/drivers/net/phy/rtl8366rb.c
View file

@ -246,8 +246,8 @@ static int rtl8366rb_reset_chip(struct rtl8366_smi *smi)
int timeout = 10;
u32 data;
rtl8366_smi_write_reg(smi, RTL8366RB_RESET_CTRL_REG,
RTL8366RB_CHIP_CTRL_RESET_HW);
rtl8366_smi_write_reg_noack(smi, RTL8366RB_RESET_CTRL_REG,
RTL8366RB_CHIP_CTRL_RESET_HW);
do {
msleep(1);
if (rtl8366_smi_read_reg(smi, RTL8366RB_RESET_CTRL_REG, &data))

4
target/linux/generic/files/drivers/net/phy/rtl8366s.c
View file

@ -229,8 +229,8 @@ static int rtl8366s_reset_chip(struct rtl8366_smi *smi)
int timeout = 10;
u32 data;
rtl8366_smi_write_reg(smi, RTL8366S_RESET_CTRL_REG,
RTL8366S_CHIP_CTRL_RESET_HW);
rtl8366_smi_write_reg_noack(smi, RTL8366S_RESET_CTRL_REG,
RTL8366S_CHIP_CTRL_RESET_HW);
do {
msleep(1);
if (rtl8366_smi_read_reg(smi, RTL8366S_RESET_CTRL_REG, &data))