diff options
| -rw-r--r-- | drivers/ata/pata_amd.c | 129 |
1 files changed, 93 insertions, 36 deletions
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c index e71125a4bd9..761a66608d7 100644 --- a/drivers/ata/pata_amd.c +++ b/drivers/ata/pata_amd.c @@ -220,6 +220,62 @@ static void amd133_set_dmamode(struct ata_port *ap, struct ata_device *adev) timing_setup(ap, adev, 0x40, adev->dma_mode, 4); } +/* Both host-side and drive-side detection results are worthless on NV + * PATAs. Ignore them and just follow what BIOS configured. Both the + * current configuration in PCI config reg and ACPI GTM result are + * cached during driver attach and are consulted to select transfer + * mode. + */ +static unsigned long nv_mode_filter(struct ata_device *dev, + unsigned long xfer_mask) +{ + static const unsigned int udma_mask_map[] = + { ATA_UDMA2, ATA_UDMA1, ATA_UDMA0, 0, + ATA_UDMA3, ATA_UDMA4, ATA_UDMA5, ATA_UDMA6 }; + struct ata_port *ap = dev->link->ap; + char acpi_str[32] = ""; + u32 saved_udma, udma; + const struct ata_acpi_gtm *gtm; + unsigned long bios_limit = 0, acpi_limit = 0, limit; + + /* find out what BIOS configured */ + udma = saved_udma = (unsigned long)ap->host->private_data; + + if (ap->port_no == 0) + udma >>= 16; + if (dev->devno == 0) + udma >>= 8; + + if ((udma & 0xc0) == 0xc0) + bios_limit = ata_pack_xfermask(0, 0, udma_mask_map[udma & 0x7]); + + /* consult ACPI GTM too */ + gtm = ata_acpi_init_gtm(ap); + if (gtm) { + acpi_limit = ata_acpi_gtm_xfermask(dev, gtm); + + snprintf(acpi_str, sizeof(acpi_str), " (%u:%u:0x%x)", + gtm->drive[0].dma, gtm->drive[1].dma, gtm->flags); + } + + /* be optimistic, EH can take care of things if something goes wrong */ + limit = bios_limit | acpi_limit; + + /* If PIO or DMA isn't configured at all, don't limit. Let EH + * handle it. + */ + if (!(limit & ATA_MASK_PIO)) + limit |= ATA_MASK_PIO; + if (!(limit & (ATA_MASK_MWDMA | ATA_MASK_UDMA))) + limit |= ATA_MASK_MWDMA | ATA_MASK_UDMA; + + ata_port_printk(ap, KERN_DEBUG, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, " + "BIOS=0x%lx (0x%x) ACPI=0x%lx%s\n", + xfer_mask, limit, xfer_mask & limit, bios_limit, + saved_udma, acpi_limit, acpi_str); + + return xfer_mask & limit; +} /** * nv_probe_init - cable detection @@ -252,32 +308,6 @@ static void nv_error_handler(struct ata_port *ap) ata_std_postreset); } -static int nv_cable_detect(struct ata_port *ap) -{ - static const u8 bitmask[2] = {0x03, 0x0C}; - struct pci_dev *pdev = to_pci_dev(ap->host->dev); - u8 ata66; - u16 udma; - int cbl; - - pci_read_config_byte(pdev, 0x52, &ata66); - if (ata66 & bitmask[ap->port_no]) - cbl = ATA_CBL_PATA80; - else - cbl = ATA_CBL_PATA40; - - /* We now have to double check because the Nvidia boxes BIOS - doesn't always set the cable bits but does set mode bits */ - pci_read_config_word(pdev, 0x62 - 2 * ap->port_no, &udma); - if ((udma & 0xC4) == 0xC4 || (udma & 0xC400) == 0xC400) - cbl = ATA_CBL_PATA80; - /* And a triple check across suspend/resume with ACPI around */ - if (ata_acpi_init_gtm(ap) && - ata_acpi_cbl_80wire(ap, ata_acpi_init_gtm(ap))) - cbl = ATA_CBL_PATA80; - return cbl; -} - /** * nv100_set_piomode - set initial PIO mode data * @ap: ATA interface @@ -315,6 +345,14 @@ static void nv133_set_dmamode(struct ata_port *ap, struct ata_device *adev) timing_setup(ap, adev, 0x50, adev->dma_mode, 4); } +static void nv_host_stop(struct ata_host *host) +{ + u32 udma = (unsigned long)host->private_data; + + /* restore PCI config register 0x60 */ + pci_write_config_dword(to_pci_dev(host->dev), 0x60, udma); +} + static struct scsi_host_template amd_sht = { .module = THIS_MODULE, .name = DRV_NAME, @@ -479,7 +517,8 @@ static struct ata_port_operations nv100_port_ops = { .thaw = ata_bmdma_thaw, .error_handler = nv_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, - .cable_detect = nv_cable_detect, + .cable_detect = ata_cable_ignore, + .mode_filter = nv_mode_filter, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, @@ -496,6 +535,7 @@ static struct ata_port_operations nv100_port_ops = { .irq_on = ata_irq_on, .port_start = ata_sff_port_start, + .host_stop = nv_host_stop, }; static struct ata_port_operations nv133_port_ops = { @@ -512,7 +552,8 @@ static struct ata_port_operations nv133_port_ops = { .thaw = ata_bmdma_thaw, .error_handler = nv_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, - .cable_detect = nv_cable_detect, + .cable_detect = ata_cable_ignore, + .mode_filter = nv_mode_filter, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, @@ -529,6 +570,7 @@ static struct ata_port_operations nv133_port_ops = { .irq_on = ata_irq_on, .port_start = ata_sff_port_start, + .host_stop = nv_host_stop, }; static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id) @@ -615,7 +657,8 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id) .port_ops = &amd100_port_ops } }; - const struct ata_port_info *ppi[] = { NULL, NULL }; + struct ata_port_info pi; + const struct ata_port_info *ppi[] = { &pi, NULL }; static int printed_version; int type = id->driver_data; u8 fifo; @@ -629,6 +672,19 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id) if (type == 1 && pdev->revision > 0x7) type = 2; + /* Serenade ? */ + if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD && + pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE) + type = 6; /* UDMA 100 only */ + + /* + * Okay, type is determined now. Apply type-specific workarounds. + */ + pi = info[type]; + + if (type < 3) + ata_pci_clear_simplex(pdev); + /* Check for AMD7411 */ if (type == 3) /* FIFO is broken */ @@ -636,16 +692,17 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id) else pci_write_config_byte(pdev, 0x41, fifo | 0xF0); - /* Serenade ? */ - if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD && - pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE) - type = 6; /* UDMA 100 only */ + /* Cable detection on Nvidia chips doesn't work too well, + * cache BIOS programmed UDMA mode. + */ + if (type == 7 || type == 8) { + u32 udma; - if (type < 3) - ata_pci_clear_simplex(pdev); + pci_read_config_dword(pdev, 0x60, &udma); + pi.private_data = (void *)(unsigned long)udma; + } /* And fire it up */ - ppi[0] = &info[type]; return ata_pci_init_one(pdev, ppi); } |