diff options
| -rw-r--r-- | Documentation/i2c/busses/i2c-piix4 | 2 | ||||
| -rw-r--r-- | drivers/i2c/busses/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-piix4.c | 26 |
3 files changed, 24 insertions, 5 deletions
diff --git a/Documentation/i2c/busses/i2c-piix4 b/Documentation/i2c/busses/i2c-piix4 index 65da15796ed3..0982e725df09 100644 --- a/Documentation/i2c/busses/i2c-piix4 +++ b/Documentation/i2c/busses/i2c-piix4 @@ -8,7 +8,7 @@ Supported adapters: Datasheet: Only available via NDA from ServerWorks * ATI IXP200, IXP300, IXP400, SB600, SB700 and SB800 southbridges Datasheet: Not publicly available - * AMD Hudson-2, CZ + * AMD Hudson-2, ML, CZ Datasheet: Not publicly available * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge Datasheet: Publicly available at the SMSC website http://www.smsc.com diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index dbd4fa5df357..949ea64077ee 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -137,6 +137,7 @@ config I2C_PIIX4 ATI SB700 ATI SB800 AMD Hudson-2 + AMD ML AMD CZ Serverworks OSB4 Serverworks CSB5 diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 14b588cde2fd..c60f8e1790f9 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, SB800 - AMD Hudson-2, CZ + AMD Hudson-2, ML, CZ SMSC Victory66 Note: we assume there can only be one device, with one SMBus interface. @@ -231,7 +231,8 @@ static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev, const struct pci_device_id *id) { unsigned short smba_idx = 0xcd6; - u8 smba_en_lo, smba_en_hi, i2ccfg, i2ccfg_offset = 0x10, smb_en = 0x2c; + 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) { @@ -241,6 +242,16 @@ static int __devinit piix4_setup_sb800(struct pci_dev *PIIX4_dev, } /* Determine the address of the SMBus areas */ + 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 = 0x2c; + if (!request_region(smba_idx, 2, "smba_idx")) { dev_err(&PIIX4_dev->dev, "SMBus base address index region " "0x%x already in use!\n", smba_idx); @@ -252,13 +263,20 @@ static int __devinit 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; + } 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; |