diff options
| author |   Shane Huang <shane.huang@amd.com> | 2014-01-22 14:05:46 -0800 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2014-01-24 17:48:51 +0100 |
| commit | 032f708bc4f6da868ec49dac48ddf3670d8035d3 (patch) | |
| tree | a07fe98709ce0f981ce7aecf2def498cb6c3a4dc /drivers/i2c/busses/i2c-piix4.c | |
| parent | Merge branch 'akpm' (incoming from Andrew) (diff) | |
| download | linux-dev-032f708bc4f6da868ec49dac48ddf3670d8035d3.tar.xz linux-dev-032f708bc4f6da868ec49dac48ddf3670d8035d3.zip | |
i2c: piix4: Add support for AMD ML and CZ SMBus changes
The locations of SMBus register base address and enablement bit are changed
from AMD ML, which need this patch to be supported.
Signed-off-by: Shane Huang <shane.huang@amd.com>
Reviewed-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/i2c/busses/i2c-piix4.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-piix4.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index a028617b8f13..f71b4d381c00 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -22,7 +22,7 @@ Intel PIIX4, 440MX Serverworks OSB4, CSB5, CSB6, HT-1000, HT-1100 ATI IXP200, IXP300, IXP400, SB600, SB700/SP5100, SB800 - AMD Hudson-2, CZ + AMD Hudson-2, ML, CZ SMSC Victory66 Note: we assume there can only be one device, with one or more @@ -235,7 +235,8 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev, { unsigned short piix4_smba; unsigned short smba_idx = 0xcd6; - u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en; + u8 smba_en_lo, smba_en_hi, smb_en, smb_en_status; + u8 i2ccfg, i2ccfg_offset = 0x10; /* SB800 and later SMBus does not support forcing address */ if (force || force_addr) { @@ -245,7 +246,15 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev, } /* Determine the address of the SMBus areas */ - smb_en = (aux) ? 0x28 : 0x2c; + if ((PIIX4_dev->vendor == PCI_VENDOR_ID_AMD && + PIIX4_dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS && + PIIX4_dev->revision >= 0x41) || + (PIIX4_dev->vendor == PCI_VENDOR_ID_AMD && + PIIX4_dev->device == 0x790b && + PIIX4_dev->revision >= 0x49)) + smb_en = 0x00; + else + smb_en = (aux) ? 0x28 : 0x2c; if (!request_region(smba_idx, 2, "smba_idx")) { dev_err(&PIIX4_dev->dev, "SMBus base address index region " @@ -258,13 +267,22 @@ static int piix4_setup_sb800(struct pci_dev *PIIX4_dev, smba_en_hi = inb_p(smba_idx + 1); release_region(smba_idx, 2); - if ((smba_en_lo & 1) == 0) { + if (!smb_en) { + smb_en_status = smba_en_lo & 0x10; + piix4_smba = smba_en_hi << 8; + if (aux) + piix4_smba |= 0x20; + } else { + smb_en_status = smba_en_lo & 0x01; + piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0; + } + + if (!smb_en_status) { dev_err(&PIIX4_dev->dev, "Host SMBus controller not enabled!\n"); return -ENODEV; } - piix4_smba = ((smba_en_hi << 8) | smba_en_lo) & 0xffe0; if (acpi_check_region(piix4_smba, SMBIOSIZE, piix4_driver.name)) return -ENODEV; |