diff options
Diffstat (limited to 'drivers/ata/libata-sff.c')
| -rw-r--r-- | drivers/ata/libata-sff.c | 85 |
1 files changed, 69 insertions, 16 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 7645f2b30ccf..623cec914c9b 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -39,6 +39,35 @@ #include "libata.h" /** + * ata_irq_on - Enable interrupts on a port. + * @ap: Port on which interrupts are enabled. + * + * Enable interrupts on a legacy IDE device using MMIO or PIO, + * wait for idle, clear any pending interrupts. + * + * LOCKING: + * Inherited from caller. + */ +u8 ata_irq_on(struct ata_port *ap) +{ + struct ata_ioports *ioaddr = &ap->ioaddr; + u8 tmp; + + ap->ctl &= ~ATA_NIEN; + ap->last_ctl = ap->ctl; + + if (ap->flags & ATA_FLAG_MMIO) + writeb(ap->ctl, (void __iomem *) ioaddr->ctl_addr); + else + outb(ap->ctl, ioaddr->ctl_addr); + tmp = ata_wait_idle(ap); + + ap->ops->irq_clear(ap); + + return tmp; +} + +/** * ata_tf_load_pio - send taskfile registers to host controller * @ap: Port to which output is sent * @tf: ATA taskfile register set @@ -671,6 +700,14 @@ void ata_bmdma_freeze(struct ata_port *ap) writeb(ap->ctl, (void __iomem *)ioaddr->ctl_addr); else outb(ap->ctl, ioaddr->ctl_addr); + + /* Under certain circumstances, some controllers raise IRQ on + * ATA_NIEN manipulation. Also, many controllers fail to mask + * previously pending IRQ on ATA_NIEN assertion. Clear it. + */ + ata_chk_status(ap); + + ap->ops->irq_clear(ap); } /** @@ -714,7 +751,6 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, ata_reset_fn_t softreset, ata_reset_fn_t hardreset, ata_postreset_fn_t postreset) { - struct ata_eh_context *ehc = &ap->eh_context; struct ata_queued_cmd *qc; unsigned long flags; int thaw = 0; @@ -732,9 +768,7 @@ void ata_bmdma_drive_eh(struct ata_port *ap, ata_prereset_fn_t prereset, qc->tf.protocol == ATA_PROT_ATAPI_DMA)) { u8 host_stat; - host_stat = ata_bmdma_status(ap); - - ata_ehi_push_desc(&ehc->i, "BMDMA stat 0x%x", host_stat); + host_stat = ap->ops->bmdma_status(ap); /* BMDMA controllers indicate host bus error by * setting DMA_ERR bit and timing out. As it wasn't @@ -877,6 +911,7 @@ static struct ata_probe_ent *ata_pci_init_legacy_port(struct pci_dev *pdev, return NULL; probe_ent->n_ports = 2; + probe_ent->irq_flags = IRQF_SHARED; if (port_mask & ATA_PORT_PRIMARY) { probe_ent->irq = ATA_PRIMARY_IRQ; @@ -992,13 +1027,15 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, #endif } - rc = pci_request_regions(pdev, DRV_NAME); - if (rc) { - disable_dev_on_err = 0; - goto err_out; - } - - if (legacy_mode) { + if (!legacy_mode) { + rc = pci_request_regions(pdev, DRV_NAME); + if (rc) { + disable_dev_on_err = 0; + goto err_out; + } + } else { + /* Deal with combined mode hack. This side of the logic all + goes away once the combined mode hack is killed in 2.6.21 */ if (!request_region(ATA_PRIMARY_CMD, 8, "libata")) { struct resource *conflict, res; res.start = ATA_PRIMARY_CMD; @@ -1036,6 +1073,13 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, } } else legacy_mode |= ATA_PORT_SECONDARY; + + if (legacy_mode & ATA_PORT_PRIMARY) + pci_request_region(pdev, 1, DRV_NAME); + if (legacy_mode & ATA_PORT_SECONDARY) + pci_request_region(pdev, 3, DRV_NAME); + /* If there is a DMA resource, allocate it */ + pci_request_region(pdev, 4, DRV_NAME); } /* we have legacy mode, but all ports are unavailable */ @@ -1079,11 +1123,20 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, err_out_ent: kfree(probe_ent); err_out_regions: - if (legacy_mode & ATA_PORT_PRIMARY) - release_region(ATA_PRIMARY_CMD, 8); - if (legacy_mode & ATA_PORT_SECONDARY) - release_region(ATA_SECONDARY_CMD, 8); - pci_release_regions(pdev); + /* All this conditional stuff is needed for the combined mode hack + until 2.6.21 when it can go */ + if (legacy_mode) { + pci_release_region(pdev, 4); + if (legacy_mode & ATA_PORT_PRIMARY) { + release_region(ATA_PRIMARY_CMD, 8); + pci_release_region(pdev, 1); + } + if (legacy_mode & ATA_PORT_SECONDARY) { + release_region(ATA_SECONDARY_CMD, 8); + pci_release_region(pdev, 3); + } + } else + pci_release_regions(pdev); err_out: if (disable_dev_on_err) pci_disable_device(pdev); |