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| author |   Rafał Miłecki <zajec5@gmail.com> | 2011-04-01 13:26:52 +0200 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2011-04-04 16:20:07 -0400 |
| commit | ccc7c28af205888798b51b6cbc0b557ac1170a49 (patch) | |
| tree | 327d8442a68447cf4cdf8425e2e6713c77e6328a /drivers/ssb | |
| parent | ssb: pci: implement mdio reading (diff) | |
| download | linux-dev-ccc7c28af205888798b51b6cbc0b557ac1170a49.tar.xz linux-dev-ccc7c28af205888798b51b6cbc0b557ac1170a49.zip | |
ssb: pci: implement serdes workaround
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 | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c index 76cbf96001f1..1ba9f0ee6f94 100644 --- a/drivers/ssb/driver_pcicore.c +++ b/drivers/ssb/driver_pcicore.c @@ -15,6 +15,11 @@ #include "ssb_private.h" +static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address); +static void ssb_pcie_write(struct ssb_pcicore *pc, u32 address, u32 data); +static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address); +static void ssb_pcie_mdio_write(struct ssb_pcicore *pc, u8 device, + u8 address, u16 data); static inline u32 pcicore_read32(struct ssb_pcicore *pc, u16 offset) @@ -403,6 +408,27 @@ static int pcicore_is_in_hostmode(struct ssb_pcicore *pc) } #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ +/************************************************** + * Workarounds. + **************************************************/ + +static u8 ssb_pcicore_polarity_workaround(struct ssb_pcicore *pc) +{ + return (ssb_pcie_read(pc, 0x204) & 0x10) ? 0xC0 : 0x80; +} + +static void ssb_pcicore_serdes_workaround(struct ssb_pcicore *pc) +{ + const u8 serdes_pll_device = 0x1D; + const u8 serdes_rx_device = 0x1F; + u16 tmp; + + ssb_pcie_mdio_write(pc, serdes_rx_device, 1 /* Control */, + ssb_pcicore_polarity_workaround(pc)); + tmp = ssb_pcie_mdio_read(pc, serdes_pll_device, 1 /* Control */); + if (tmp & 0x4000) + ssb_pcie_mdio_write(pc, serdes_pll_device, 1, tmp & ~0x4000); +} /************************************************** * Generic and Clientmode operation code. @@ -430,6 +456,8 @@ void ssb_pcicore_init(struct ssb_pcicore *pc) #endif /* CONFIG_SSB_PCICORE_HOSTMODE */ if (!pc->hostmode) ssb_pcicore_init_clientmode(pc); + + ssb_pcicore_serdes_workaround(pc); } static u32 ssb_pcie_read(struct ssb_pcicore *pc, u32 address) @@ -467,8 +495,6 @@ 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; @@ -508,7 +534,6 @@ static u16 ssb_pcie_mdio_read(struct ssb_pcicore *pc, u8 device, u8 address) 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) |