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ssb: pci: implement mdio reading 

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2011-04-01 12:07:34 +02:00 committed by John W. Linville
parent 1b1c7acd97
commit ba91d1a1bc
1 changed files with 43 additions and 0 deletions
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43
drivers/ssb/driver_pcicore.c
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@ -467,6 +467,49 @@ static void ssb_pcie_mdio_set_phy(struct ssb_pcicore *pc, u8 phy)
}
}
#if 0
//done but not used yet
static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address)
{
const u16 mdio_control = 0x128;
const u16 mdio_data = 0x12C;
int max_retries = 10;
u16 ret = 0;
u32 v;
int i;
v = 0x80; /* Enable Preamble Sequence */
v |= 0x2; /* MDIO Clock Divisor */
pcicore_write32(pc, mdio_control, v);
if (pc->dev->id.revision >= 10) {
max_retries = 200;
ssb_pcie_mdio_set_phy(pc, device);
}
v = (1 << 30); /* Start of Transaction */
v |= (1 << 29); /* Read Transaction */
v |= (1 << 17); /* Turnaround */
if (pc->dev->id.revision < 10)
v |= (u32)device << 22;
v |= (u32)address << 18;
pcicore_write32(pc, mdio_data, v);
/* Wait for the device to complete the transaction */
udelay(10);
for (i = 0; i < 200; i++) {
v = pcicore_read32(pc, mdio_control);
if (v & 0x100 /* Trans complete */) {
udelay(10);
ret = pcicore_read32(pc, mdio_data);
break;
}
msleep(1);
}
pcicore_write32(pc, mdio_control, 0);
return ret;
}
#endif
static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device,
u8 address, u16 data)
{