diff options
Diffstat (limited to 'drivers/ata/libata-sff.c')
| -rw-r--r-- | drivers/ata/libata-sff.c | 187 |
1 files changed, 103 insertions, 84 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 97dd8f2..60cd4b1 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -714,6 +714,99 @@ int ata_pci_prepare_sff_host(struct pci_dev *pdev, } /** + * ata_pci_activate_sff_host - start SFF host, request IRQ and register it + * @host: target SFF ATA host + * @irq_handler: irq_handler used when requesting IRQ(s) + * @sht: scsi_host_template to use when registering the host + * + * This is the counterpart of ata_host_activate() for SFF ATA + * hosts. This separate helper is necessary because SFF hosts + * use two separate interrupts in legacy mode. + * + * LOCKING: + * Inherited from calling layer (may sleep). + * + * RETURNS: + * 0 on success, -errno otherwise. + */ +int ata_pci_activate_sff_host(struct ata_host *host, + irq_handler_t irq_handler, + struct scsi_host_template *sht) +{ + struct device *dev = host->dev; + struct pci_dev *pdev = to_pci_dev(dev); + const char *drv_name = dev_driver_string(host->dev); + int legacy_mode = 0, rc; + + rc = ata_host_start(host); + if (rc) + return rc; + + if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { + u8 tmp8, mask; + + /* TODO: What if one channel is in native mode ... */ + pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); + mask = (1 << 2) | (1 << 0); + if ((tmp8 & mask) != mask) + legacy_mode = 1; +#if defined(CONFIG_NO_ATA_LEGACY) + /* Some platforms with PCI limits cannot address compat + port space. In that case we punt if their firmware has + left a device in compatibility mode */ + if (legacy_mode) { + printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); + return -EOPNOTSUPP; + } +#endif + } + + if (!devres_open_group(dev, NULL, GFP_KERNEL)) + return -ENOMEM; + + if (!legacy_mode && pdev->irq) { + rc = devm_request_irq(dev, pdev->irq, irq_handler, + IRQF_SHARED, drv_name, host); + if (rc) + goto out; + + ata_port_desc(host->ports[0], "irq %d", pdev->irq); + ata_port_desc(host->ports[1], "irq %d", pdev->irq); + } else if (legacy_mode) { + if (!ata_port_is_dummy(host->ports[0])) { + rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev), + irq_handler, IRQF_SHARED, + drv_name, host); + if (rc) + goto out; + + ata_port_desc(host->ports[0], "irq %d", + ATA_PRIMARY_IRQ(pdev)); + } + + if (!ata_port_is_dummy(host->ports[1])) { + rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev), + irq_handler, IRQF_SHARED, + drv_name, host); + if (rc) + goto out; + + ata_port_desc(host->ports[1], "irq %d", + ATA_SECONDARY_IRQ(pdev)); + } + } + + rc = ata_host_register(host, sht); + out: + if (rc == 0) + devres_remove_group(dev, NULL); + else + devres_release_group(dev, NULL); + + return rc; +} + +/** * ata_pci_init_one - Initialize/register PCI IDE host controller * @pdev: Controller to be initialized * @ppi: array of port_info, must be enough for two ports @@ -742,9 +835,6 @@ int ata_pci_init_one(struct pci_dev *pdev, struct device *dev = &pdev->dev; const struct ata_port_info *pi = NULL; struct ata_host *host = NULL; - const char *drv_name = dev_driver_string(&pdev->dev); - u8 mask; - int legacy_mode = 0; int i, rc; DPRINTK("ENTER\n"); @@ -766,95 +856,24 @@ int ata_pci_init_one(struct pci_dev *pdev, if (!devres_open_group(dev, NULL, GFP_KERNEL)) return -ENOMEM; - /* FIXME: Really for ATA it isn't safe because the device may be - multi-purpose and we want to leave it alone if it was already - enabled. Secondly for shared use as Arjan says we want refcounting - - Checking dev->is_enabled is insufficient as this is not set at - boot for the primary video which is BIOS enabled - */ - rc = pcim_enable_device(pdev); if (rc) - goto err_out; + goto out; - if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) { - u8 tmp8; - - /* TODO: What if one channel is in native mode ... */ - pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8); - mask = (1 << 2) | (1 << 0); - if ((tmp8 & mask) != mask) - legacy_mode = 1; -#if defined(CONFIG_NO_ATA_LEGACY) - /* Some platforms with PCI limits cannot address compat - port space. In that case we punt if their firmware has - left a device in compatibility mode */ - if (legacy_mode) { - printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); - rc = -EOPNOTSUPP; - goto err_out; - } -#endif - } - - /* prepare host */ + /* prepare and activate SFF host */ rc = ata_pci_prepare_sff_host(pdev, ppi, &host); if (rc) - goto err_out; + goto out; pci_set_master(pdev); + rc = ata_pci_activate_sff_host(host, pi->port_ops->irq_handler, + pi->sht); + out: + if (rc == 0) + devres_remove_group(&pdev->dev, NULL); + else + devres_release_group(&pdev->dev, NULL); - /* start host and request IRQ */ - rc = ata_host_start(host); - if (rc) - goto err_out; - - if (!legacy_mode && pdev->irq) { - /* We may have no IRQ assigned in which case we can poll. This - shouldn't happen on a sane system but robustness is cheap - in this case */ - rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler, - IRQF_SHARED, drv_name, host); - if (rc) - goto err_out; - - ata_port_desc(host->ports[0], "irq %d", pdev->irq); - ata_port_desc(host->ports[1], "irq %d", pdev->irq); - } else if (legacy_mode) { - if (!ata_port_is_dummy(host->ports[0])) { - rc = devm_request_irq(dev, ATA_PRIMARY_IRQ(pdev), - pi->port_ops->irq_handler, - IRQF_SHARED, drv_name, host); - if (rc) - goto err_out; - - ata_port_desc(host->ports[0], "irq %d", - ATA_PRIMARY_IRQ(pdev)); - } - - if (!ata_port_is_dummy(host->ports[1])) { - rc = devm_request_irq(dev, ATA_SECONDARY_IRQ(pdev), - pi->port_ops->irq_handler, - IRQF_SHARED, drv_name, host); - if (rc) - goto err_out; - - ata_port_desc(host->ports[1], "irq %d", - ATA_SECONDARY_IRQ(pdev)); - } - } - - /* register */ - rc = ata_host_register(host, pi->sht); - if (rc) - goto err_out; - - devres_remove_group(dev, NULL); - return 0; - -err_out: - devres_release_group(dev, NULL); return rc; } |
