diff options
| author | Rafał Miłecki <zajec5@gmail.com> | 2011-04-01 12:07:34 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-04-04 22:20:07 +0200 |
| commit | ba91d1a1bcccd90247b5b9703c1a236cc2e95698 (patch) | |
| tree | c675d1dc7cebe0396e9df0a27d690eea9e853173 /drivers/ssb | |
| parent | ssb: pci: fix mdio writes on newer cores (rev 10+) (diff) | |
| download | linux-ba91d1a1bcccd90247b5b9703c1a236cc2e95698.tar.xz linux-ba91d1a1bcccd90247b5b9703c1a236cc2e95698.zip | |
ssb: pci: implement mdio reading
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/ssb')
| -rw-r--r-- | drivers/ssb/driver_pcicore.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c index 08fa6fdfc101..76cbf96001f1 100644 --- a/drivers/ssb/driver_pcicore.c +++ b/drivers/ssb/driver_pcicore.c @@ -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) { |