diff options
Diffstat (limited to 'drivers/scsi/ata_piix.c')
| -rw-r--r-- | drivers/scsi/ata_piix.c | 127 |
1 files changed, 93 insertions, 34 deletions
diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c index 333d69dd84ef..0ea27873b9ff 100644 --- a/drivers/scsi/ata_piix.c +++ b/drivers/scsi/ata_piix.c @@ -37,6 +37,49 @@ * * Hardware documentation available at http://developer.intel.com/ * + * Documentation + * Publically available from Intel web site. Errata documentation + * is also publically available. As an aide to anyone hacking on this + * driver the list of errata that are relevant is below.going back to + * PIIX4. Older device documentation is now a bit tricky to find. + * + * The chipsets all follow very much the same design. The orginal Triton + * series chipsets do _not_ support independant device timings, but this + * is fixed in Triton II. With the odd mobile exception the chips then + * change little except in gaining more modes until SATA arrives. This + * driver supports only the chips with independant timing (that is those + * with SITRE and the 0x44 timing register). See pata_oldpiix and pata_mpiix + * for the early chip drivers. + * + * Errata of note: + * + * Unfixable + * PIIX4 errata #9 - Only on ultra obscure hw + * ICH3 errata #13 - Not observed to affect real hw + * by Intel + * + * Things we must deal with + * PIIX4 errata #10 - BM IDE hang with non UDMA + * (must stop/start dma to recover) + * 440MX errata #15 - As PIIX4 errata #10 + * PIIX4 errata #15 - Must not read control registers + * during a PIO transfer + * 440MX errata #13 - As PIIX4 errata #15 + * ICH2 errata #21 - DMA mode 0 doesn't work right + * ICH0/1 errata #55 - As ICH2 errata #21 + * ICH2 spec c #9 - Extra operations needed to handle + * drive hotswap [NOT YET SUPPORTED] + * ICH2 spec c #20 - IDE PRD must not cross a 64K boundary + * and must be dword aligned + * ICH2 spec c #24 - UDMA mode 4,5 t85/86 should be 6ns not 3.3 + * + * Should have been BIOS fixed: + * 450NX: errata #19 - DMA hangs on old 450NX + * 450NX: errata #20 - DMA hangs on old 450NX + * 450NX: errata #25 - Corruption with DMA on old 450NX + * ICH3 errata #15 - IDE deadlock under high load + * (BIOS must set dev 31 fn 0 bit 23) + * ICH3 errata #18 - Don't use native mode */ #include <linux/kernel.h> @@ -78,9 +121,7 @@ enum { ich5_sata = 1, piix4_pata = 2, ich6_sata = 3, - ich6_sata_rm = 4, - ich7_sata = 5, - esb2_sata = 6, + ich6_sata_ahci = 4, PIIX_AHCI_DEVICE = 6, }; @@ -111,11 +152,11 @@ static const struct pci_device_id piix_pci_tbl[] = { { 0x8086, 0x25a3, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x25b0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich5_sata }, { 0x8086, 0x2651, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata }, - { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm }, - { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_rm }, - { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata }, - { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich7_sata }, - { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, esb2_sata }, + { 0x8086, 0x2652, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, + { 0x8086, 0x2653, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, + { 0x8086, 0x27c0, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, + { 0x8086, 0x27c4, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, + { 0x8086, 0x2680, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich6_sata_ahci }, { } /* terminate list */ }; @@ -258,31 +299,7 @@ static struct ata_port_info piix_port_info[] = { .port_ops = &piix_sata_ops, }, - /* ich6_sata_rm */ - { - .sht = &piix_sht, - .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | - PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | - ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI, - .pio_mask = 0x1f, /* pio0-4 */ - .mwdma_mask = 0x07, /* mwdma0-2 */ - .udma_mask = 0x7f, /* udma0-6 */ - .port_ops = &piix_sata_ops, - }, - - /* ich7_sata */ - { - .sht = &piix_sht, - .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | - PIIX_FLAG_COMBINED | PIIX_FLAG_CHECKINTR | - ATA_FLAG_SLAVE_POSS | PIIX_FLAG_AHCI, - .pio_mask = 0x1f, /* pio0-4 */ - .mwdma_mask = 0x07, /* mwdma0-2 */ - .udma_mask = 0x7f, /* udma0-6 */ - .port_ops = &piix_sata_ops, - }, - - /* esb2_sata */ + /* ich6_sata_ahci */ { .sht = &piix_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SRST | @@ -603,6 +620,40 @@ static int piix_disable_ahci(struct pci_dev *pdev) } /** + * piix_check_450nx_errata - Check for problem 450NX setup + * + * Check for the present of 450NX errata #19 and errata #25. If + * they are found return an error code so we can turn off DMA + */ + +static int __devinit piix_check_450nx_errata(struct pci_dev *ata_dev) +{ + struct pci_dev *pdev = NULL; + u16 cfg; + u8 rev; + int no_piix_dma = 0; + + while((pdev = pci_get_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82454NX, pdev)) != NULL) + { + /* Look for 450NX PXB. Check for problem configurations + A PCI quirk checks bit 6 already */ + pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); + pci_read_config_word(pdev, 0x41, &cfg); + /* Only on the original revision: IDE DMA can hang */ + if(rev == 0x00) + no_piix_dma = 1; + /* On all revisions below 5 PXB bus lock must be disabled for IDE */ + else if(cfg & (1<<14) && rev < 5) + no_piix_dma = 2; + } + if(no_piix_dma) + dev_printk(KERN_WARNING, &ata_dev->dev, "450NX errata present, disabling IDE DMA.\n"); + if(no_piix_dma == 2) + dev_printk(KERN_WARNING, &ata_dev->dev, "A BIOS update may resolve this.\n"); + return no_piix_dma; +} + +/** * piix_init_one - Register PIIX ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in piix_pci_tbl matching with @pdev @@ -676,7 +727,15 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) "combined mode detected (p=%u, s=%u)\n", pata_chan, sata_chan); } - + if (piix_check_450nx_errata(pdev)) { + /* This writes into the master table but it does not + really matter for this errata as we will apply it to + all the PIIX devices on the board */ + port_info[0]->mwdma_mask = 0; + port_info[0]->udma_mask = 0; + port_info[1]->mwdma_mask = 0; + port_info[1]->udma_mask = 0; + } return ata_pci_init_one(pdev, port_info, 2); } |