* @tf: ATA taskfile register set for storing input
*
* Reads ATA taskfile registers for currently-selected device
- * into @tf.
+ * into @tf. Assumes the device has a fully SFF compliant task file
+ * layout and behaviour. If you device does not (eg has a different
+ * status method) then you will need to provide a replacement tf_read
*
* LOCKING:
* Inherited from caller.
* LOCKING:
* spin_lock_irqsave(host lock)
*/
-void ata_bmdma_start (struct ata_queued_cmd *qc)
+void ata_bmdma_start(struct ata_queued_cmd *qc)
{
struct ata_port *ap = qc->ap;
u8 dmactl;
ap->hsm_task_state = HSM_ST_IDLE;
if (qc && (qc->tf.protocol == ATA_PROT_DMA ||
- qc->tf.protocol == ATA_PROT_ATAPI_DMA)) {
+ qc->tf.protocol == ATAPI_PROT_DMA)) {
u8 host_stat;
host_stat = ap->ops->bmdma_status(ap);
return rc;
/* request and iomap DMA region */
- rc = pcim_iomap_regions(pdev, 1 << 4, DRV_NAME);
+ rc = pcim_iomap_regions(pdev, 1 << 4, dev_driver_string(gdev));
if (rc) {
dev_printk(KERN_ERR, gdev, "failed to request/iomap BAR4\n");
return -ENOMEM;
continue;
}
- rc = pcim_iomap_regions(pdev, 0x3 << base, DRV_NAME);
+ rc = pcim_iomap_regions(pdev, 0x3 << base,
+ dev_driver_string(gdev));
if (rc) {
dev_printk(KERN_WARNING, gdev,
"failed to request/iomap BARs for port %d "
return rc;
}
+/**
+ * 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
struct device *dev = &pdev->dev;
const struct ata_port_info *pi = NULL;
struct ata_host *host = NULL;
- u8 mask;
- int legacy_mode = 0;
int i, rc;
DPRINTK("ENTER\n");
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;
-
- 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
- }
+ goto out;
- /* 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) {
- 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 (!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;
}
* @pdev: PCI device
*
* Some PCI ATA devices report simplex mode but in fact can be told to
- * enter non simplex mode. This implements the neccessary logic to
+ * enter non simplex mode. This implements the necessary logic to
* perform the task on such devices. Calling it on other devices will
* have -undefined- behaviour.
*/
git.openpandora.org / pandora-kernel.git / blobdiff