diff options
Diffstat (limited to 'src/southbridge')
| -rw-r--r-- | src/southbridge/amd/sb700/sata.c | 83 |
1 files changed, 75 insertions, 8 deletions
diff --git a/src/southbridge/amd/sb700/sata.c b/src/southbridge/amd/sb700/sata.c index 63c07d86c4..a59708f912 100644 --- a/src/southbridge/amd/sb700/sata.c +++ b/src/southbridge/amd/sb700/sata.c @@ -27,12 +27,15 @@ static int sata_drive_detect(int portnum, uint16_t iobar) { u8 byte, byte2; + u8 byte_prev, byte2_prev; int i = 0; + byte_prev = byte2_prev = 0; outb(0xa0 + 0x10 * (portnum % 2), iobar + 0x6); while (byte = inb(iobar + 0x6), byte2 = inb(iobar + 0x7), (byte != (0xa0 + 0x10 * (portnum % 2))) || ((byte2 & 0x88) != 0)) { - printk(BIOS_SPEW, "0x6=%x, 0x7=%x\n", byte, byte2); + if ((byte != byte_prev) || (byte2 != byte2_prev)) + printk(BIOS_SPEW, "0x6=%x, 0x7=%x\n", byte, byte2); if (byte != (0xa0 + 0x10 * (portnum % 2))) { /* This will happen at the first iteration of this loop * if the first SATA port is unpopulated and the @@ -41,11 +44,22 @@ static int sata_drive_detect(int portnum, uint16_t iobar) printk(BIOS_DEBUG, "drive no longer selected after %i ms, " "retrying init\n", i * 10); return 1; - } else - printk(BIOS_SPEW, "drive detection not yet completed, " - "waiting...\n"); + } else { + if (i == 0) + printk(BIOS_SPEW, "drive detection not yet completed, " + "waiting...\n"); + } mdelay(10); i++; + byte_prev = byte; + byte2_prev = byte2; + + /* Detect stuck SATA controller and attempt reset */ + if (i > 1024) { + printk(BIOS_DEBUG, "drive detection not done after %i ms, " + "resetting HBA and retrying init\n", i * 10); + return 2; + } } printk(BIOS_SPEW, "drive detection done after %i ms\n", i * 10); return 0; @@ -101,12 +115,13 @@ static void sata_init(struct device *dev) uint16_t sata_bar0, sata_bar1, sata_bar2, sata_bar3, sata_bar4; uint16_t ide_bar0, ide_bar1, ide_bar2, ide_bar3; uint16_t current_bar; - int i, j; + int i, j, ret; uint8_t nvram; uint8_t sata_ahci_mode; uint8_t sata_alpm_enable; uint8_t port_count; uint8_t max_port_count; + uint8_t hba_reset_count; sata_ahci_mode = 0; if (get_option(&nvram, "sata_ahci_mode") == CB_SUCCESS) @@ -120,14 +135,23 @@ 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: byte = pci_read_config8(sm_dev, 0xad); /* Disable SATA SMBUS */ - byte |= (1 << 0); - /* Enable SATA and power saving */ byte |= (1 << 1); + /* Enable SATA and power saving */ + byte |= (1 << 0); byte |= (1 << 5); pci_write_config8(sm_dev, 0xad, byte); + /* Take the PHY logic out of reset */ + word = pci_read_config16(dev, 0x84); + word |= 0x1 << 2; + word &= ~0x1f8; + pci_write_config16(dev, 0x84, word); + /* get rev_id */ rev_id = pci_read_config8(sm_dev, 0x08) - 0x28; @@ -320,6 +344,26 @@ static void sata_init(struct device *dev) if (port_count > max_port_count) port_count = max_port_count; + /* Send COMRESET to all ports */ + for (i = 0; i < port_count; i++) { + /* 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 1ms */ + mdelay(1); + + /* Clear Reset Bit */ + byte &= ~0x01; + write8((sata_bar5 + 0x12C + 0x80 * i), byte); + + /* Wait 1ms */ + mdelay(1); + } + /* RPR7.7 SATA drive detection. */ /* Use BAR5+0x128,BAR0 for Primary Slave */ /* Use BAR5+0x1A8,BAR0 for Primary Slave */ @@ -365,8 +409,31 @@ static void sata_init(struct device *dev) current_bar = ((i / 2) == 0) ? sata_bar0 : sata_bar2; else current_bar = ide_bar0; - if (!sata_drive_detect(i, current_bar)) + 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 &= ~(0x1); + 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"); + } } if (sata_ahci_mode) printk(BIOS_DEBUG, "AHCI device %d is %sready after %i tries\n", |