diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/southbridge/amd/sb700/sata.c | 81 |
1 files changed, 42 insertions, 39 deletions
diff --git a/src/southbridge/amd/sb700/sata.c b/src/southbridge/amd/sb700/sata.c index 8ccc7b613c..235278da16 100644 --- a/src/southbridge/amd/sb700/sata.c +++ b/src/southbridge/amd/sb700/sata.c @@ -121,7 +121,6 @@ static void sata_init(struct device *dev) uint8_t sata_alpm_enable; uint8_t port_count; uint8_t max_port_count; - uint8_t hba_reset_count; uint8_t ide_io_enabled; uint8_t ide_legacy_io_enabled; @@ -137,14 +136,20 @@ static void sata_init(struct device *dev) /* SATA SMBus Disable */ sm_dev = dev_find_slot(0, PCI_DEVFN(0x14, 0)); - hba_reset_count = 0; - -retry_init: + /* WARNING + * Enabling the SATA link latency enhancement (SMBUS 0xAD bit 5) + * causes random persistent drive detection failures until it is cleared, + * with the probabability of detection failure rising exponentially with + * the number of drives attached to the controller! + * This happens on Rev15 H/W. + * Do NOT follow the RPR advice; leave this bit set at all times... + */ byte = pci_read_config8(sm_dev, 0xad); /* Disable SATA SMBUS */ byte |= (1 << 1); /* Enable SATA and power saving */ byte |= (1 << 0); + /* Disable link latency enhancement */ byte |= (1 << 5); pci_write_config8(sm_dev, 0xad, byte); @@ -159,15 +164,6 @@ retry_init: printk(BIOS_SPEW, "rev_id=%x\n", rev_id); - if (sata_ahci_mode) { - /* Enable link latency enhancement on A14 and above */ - if (rev_id >= 0x14) { - byte = pci_read_config8(sm_dev, 0xad); - byte &= ~(1 << 5); - pci_write_config8(sm_dev, 0xad, byte); - } - } - /* Enable combined mode */ byte = pci_read_config8(sm_dev, 0xad); byte |= (1 << 3); @@ -281,6 +277,17 @@ retry_init: write32(sata_bar5 + 0xfc, dword); } + /* Enable SATA ports */ + byte = pci_read_config8(dev, 0x42); + if (max_port_count <= 6) { + byte |= 0x3f; + for (i = 0; i < max_port_count; i++) + byte &= ~(0x1 << i); + } else { + byte &= ~0x3f; + } + pci_write_config8(dev, 0x42, byte); + if (sata_ahci_mode) { /* FIXME * SeaBIOS does not know how to spin @@ -302,6 +309,9 @@ retry_init: write32(sata_bar5 + 0x04, dword); } + sb7xx_51xx_setup_sata_phys(dev); + sb7xx_51xx_setup_sata_port_indication(sata_bar5); + /* Write protect Sub-Class Code */ byte = pci_read_config8(dev, 0x40); byte &= ~(1 << 0); @@ -327,7 +337,7 @@ retry_init: else { dword &= ~(1 << 24 | 1 << 21); /* A14 and above */ dword &= ~0xFF80; /* 15:7 */ - dword |= 1 << 15 | 0x7F << 7; + dword |= 1 << 15 | 0x7F << 7 | 1 << 6; } pci_write_config32(dev, 0x48, dword); @@ -335,9 +345,6 @@ retry_init: byte = 0x10; pci_write_config8(dev, 0x46, byte); - sb7xx_51xx_setup_sata_phys(dev); - sb7xx_51xx_setup_sata_port_indication(sata_bar5); - /* Enable the I/O, MM, BusMaster access for SATA */ byte = pci_read_config8(dev, 0x4); byte |= 7 << 0; @@ -422,32 +429,28 @@ retry_init: if (i < 4) current_bar = ((i / 2) == 0) ? sata_bar0 : sata_bar2; else - current_bar = ide_bar0; + current_bar = (pci_read_config8(sm_dev, 0xad) & (0x1 << 4)) + ? ide_bar2 : ide_bar0; ret = sata_drive_detect(i, current_bar); if (ret == 0) { break; } else if (ret == 2) { - /* Reset PHY logic */ - word = pci_read_config16(dev, 0x84); - word &= ~(0x1 << 2); - word |= 0x1f8; - pci_write_config16(dev, 0x84, word); - - /* Disable SATA controller */ - byte = pci_read_config8(sm_dev, 0xad); - byte &= ~(1 << 0); - byte &= ~(1 << 3); - pci_write_config8(sm_dev, 0xad, byte); - - mdelay(100); - - /* Retry initialization */ - hba_reset_count++; - if (hba_reset_count < 16) - goto retry_init; - else - printk(BIOS_WARNING, "HBA reset count exceeded, " - "continuing but AHCI drives may not function\n"); + /* Read in Port-N Serial ATA Control Register */ + byte = read8(sata_bar5 + 0x12C + 0x80 * i); + + /* Set Reset Bit */ + byte |= 0x1; + write8((sata_bar5 + 0x12C + 0x80 * i), byte); + + /* Wait 1000ms */ + mdelay(1000); + + /* Clear Reset Bit */ + byte &= ~0x01; + write8((sata_bar5 + 0x12C + 0x80 * i), byte); + + /* Wait 1ms */ + mdelay(1); } } if (sata_ahci_mode) |