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| author | Rafał Miłecki <zajec5@gmail.com> | 2011-02-17 01:50:50 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-02-18 16:54:54 -0500 |
| commit | b1a1bcf714c4d79f7872a34138d100941ebb0a0b (patch) | |
| tree | 3e93caf667a9f342c5ff6d9af48e38c1b2ffa035 | |
| parent | 0d4171e2153b70957fe67867420a1a24d5e4cd82 (diff) | |
| download | kernel_samsung_smdk4412-b1a1bcf714c4d79f7872a34138d100941ebb0a0b.zip kernel_samsung_smdk4412-b1a1bcf714c4d79f7872a34138d100941ebb0a0b.tar.gz kernel_samsung_smdk4412-b1a1bcf714c4d79f7872a34138d100941ebb0a0b.tar.bz2 | |
ssb: when needed, reject IM input while disabling device
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/ssb/main.c | 16 | ||||
| -rw-r--r-- | include/linux/ssb/ssb_regs.h | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c index 775c579..06c0b6d 100644 --- a/drivers/ssb/main.c +++ b/drivers/ssb/main.c @@ -1220,7 +1220,7 @@ static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask, void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) { - u32 reject; + u32 reject, val; if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET) return; @@ -1229,12 +1229,26 @@ void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1); ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); + + if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { + val = ssb_read32(dev, SSB_IMSTATE); + val |= SSB_IMSTATE_REJECT; + ssb_write32(dev, SSB_IMSTATE, val); + ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000, 0); + } + ssb_write32(dev, SSB_TMSLOW, SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | reject | SSB_TMSLOW_RESET | core_specific_flags); ssb_flush_tmslow(dev); + if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { + val = ssb_read32(dev, SSB_IMSTATE); + val &= ~SSB_IMSTATE_REJECT; + ssb_write32(dev, SSB_IMSTATE, val); + } + ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_RESET | core_specific_flags); diff --git a/include/linux/ssb/ssb_regs.h b/include/linux/ssb/ssb_regs.h index 9b1125b..402955a 100644 --- a/include/linux/ssb/ssb_regs.h +++ b/include/linux/ssb/ssb_regs.h @@ -85,6 +85,8 @@ #define SSB_IMSTATE_AP_RSV 0x00000030 /* Reserved */ #define SSB_IMSTATE_IBE 0x00020000 /* In Band Error */ #define SSB_IMSTATE_TO 0x00040000 /* Timeout */ +#define SSB_IMSTATE_BUSY 0x01800000 /* Busy (Backplane rev >= 2.3 only) */ +#define SSB_IMSTATE_REJECT 0x02000000 /* Reject (Backplane rev >= 2.3 only) */ #define SSB_INTVEC 0x0F94 /* SB Interrupt Mask */ #define SSB_INTVEC_PCI 0x00000001 /* Enable interrupts for PCI */ #define SSB_INTVEC_ENET0 0x00000002 /* Enable interrupts for enet 0 */ |