/*
- * libata-bmdma.c - helper library for PCI IDE BMDMA
+ * libata-sff.c - helper library for PCI IDE BMDMA
*
* Maintained by: Jeff Garzik <jgarzik@pobox.com>
* Please ALWAYS copy linux-ide@vger.kernel.org
u8 ata_irq_ack(struct ata_port *ap, unsigned int chk_drq)
{
unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
- u8 host_stat, post_stat, status;
+ u8 host_stat = 0, post_stat = 0, status;
status = ata_busy_wait(ap, bits, 1000);
if (status & bits)
if (ata_msg_err(ap))
printk(KERN_ERR "abnormal status 0x%X\n", status);
- /* get controller status; clear intr, err bits */
- host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
- iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
- ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
-
- post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ if (ap->ioaddr.bmdma_addr) {
+ /* get controller status; clear intr, err bits */
+ host_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ iowrite8(host_stat | ATA_DMA_INTR | ATA_DMA_ERR,
+ ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ post_stat = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS);
+ }
if (ata_msg_intr(ap))
printk(KERN_INFO "%s: irq ack: host_stat 0x%X, new host_stat 0x%X, drv_stat 0x%X\n",
__FUNCTION__,
host_stat, post_stat, status);
-
return status;
}
tf->hob_lbal = ioread8(ioaddr->lbal_addr);
tf->hob_lbam = ioread8(ioaddr->lbam_addr);
tf->hob_lbah = ioread8(ioaddr->lbah_addr);
+ iowrite8(tf->ctl, ioaddr->ctl_addr);
+ ap->last_ctl = tf->ctl;
}
}
dmactl = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
iowrite8(dmactl | ATA_DMA_START, ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
- /* Strictly, one may wish to issue a readb() here, to
+ /* Strictly, one may wish to issue an ioread8() here, to
* flush the mmio write. However, control also passes
* to the hardware at this point, and it will interrupt
* us when we are to resume control. So, in effect,
* is expected, so I think it is best to not add a readb()
* without first all the MMIO ATA cards/mobos.
* Or maybe I'm just being paranoid.
+ *
+ * FIXME: The posting of this write means I/O starts are
+ * unneccessarily delayed for MMIO
*/
}
ata_bmdma_stop(qc);
}
+/**
+ * ata_sff_port_start - Set port up for dma.
+ * @ap: Port to initialize
+ *
+ * Called just after data structures for each port are
+ * initialized. Allocates space for PRD table if the device
+ * is DMA capable SFF.
+ *
+ * May be used as the port_start() entry in ata_port_operations.
+ *
+ * LOCKING:
+ * Inherited from caller.
+ */
+
+int ata_sff_port_start(struct ata_port *ap)
+{
+ if (ap->ioaddr.bmdma_addr)
+ return ata_port_start(ap);
+ return 0;
+}
+
#ifdef CONFIG_PCI
static int ata_resources_present(struct pci_dev *pdev, int port)
struct pci_dev *pdev = to_pci_dev(gdev);
int i, rc;
+ /* No BAR4 allocation: No DMA */
+ if (pci_resource_start(pdev, 4) == 0)
+ return 0;
+
/* TODO: If we get no DMA mask we should fall back to PIO */
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
}
/**
- * ata_pci_init_native_host - acquire native ATA resources and init host
+ * ata_pci_init_sff_host - acquire native PCI ATA resources and init host
* @host: target ATA host
*
* Acquire native PCI ATA resources for @host and initialize the
* first two ports of @host accordingly. Ports marked dummy are
* skipped and allocation failure makes the port dummy.
*
+ * Note that native PCI resources are valid even for legacy hosts
+ * as we fix up pdev resources array early in boot, so this
+ * function can be used for both native and legacy SFF hosts.
+ *
* LOCKING:
* Inherited from calling layer (may sleep).
*
* 0 if at least one port is initialized, -ENODEV if no port is
* available.
*/
-int ata_pci_init_native_host(struct ata_host *host)
+int ata_pci_init_sff_host(struct ata_host *host)
{
struct device *gdev = host->dev;
struct pci_dev *pdev = to_pci_dev(gdev);
}
/**
- * ata_pci_prepare_native_host - helper to prepare native PCI ATA host
+ * ata_pci_prepare_sff_host - helper to prepare native PCI ATA host
* @pdev: target PCI device
* @ppi: array of port_info, must be enough for two ports
* @r_host: out argument for the initialized ATA host
* RETURNS:
* 0 on success, -errno otherwise.
*/
-int ata_pci_prepare_native_host(struct pci_dev *pdev,
- const struct ata_port_info * const * ppi,
- struct ata_host **r_host)
+int ata_pci_prepare_sff_host(struct pci_dev *pdev,
+ const struct ata_port_info * const * ppi,
+ struct ata_host **r_host)
{
struct ata_host *host;
int rc;
goto err_out;
}
- rc = ata_pci_init_native_host(host);
+ rc = ata_pci_init_sff_host(host);
if (rc)
goto err_out;
return rc;
}
-struct ata_legacy_devres {
- unsigned int mask;
- unsigned long cmd_port[2];
- void __iomem * cmd_addr[2];
- void __iomem * ctl_addr[2];
- unsigned int irq[2];
- void * irq_dev_id[2];
-};
-
-static void ata_legacy_free_irqs(struct ata_legacy_devres *legacy_dr)
-{
- int i;
-
- for (i = 0; i < 2; i++) {
- if (!legacy_dr->irq[i])
- continue;
-
- free_irq(legacy_dr->irq[i], legacy_dr->irq_dev_id[i]);
- legacy_dr->irq[i] = 0;
- legacy_dr->irq_dev_id[i] = NULL;
- }
-}
-
-static void ata_legacy_release(struct device *gdev, void *res)
-{
- struct ata_legacy_devres *this = res;
- int i;
-
- ata_legacy_free_irqs(this);
-
- for (i = 0; i < 2; i++) {
- if (this->cmd_addr[i])
- ioport_unmap(this->cmd_addr[i]);
- if (this->ctl_addr[i])
- ioport_unmap(this->ctl_addr[i]);
- if (this->cmd_port[i])
- release_region(this->cmd_port[i], 8);
- }
-}
-
-static int ata_init_legacy_port(struct ata_port *ap,
- struct ata_legacy_devres *legacy_dr)
-{
- struct ata_host *host = ap->host;
- int port_no = ap->port_no;
- unsigned long cmd_port, ctl_port;
-
- if (port_no == 0) {
- cmd_port = ATA_PRIMARY_CMD;
- ctl_port = ATA_PRIMARY_CTL;
- } else {
- cmd_port = ATA_SECONDARY_CMD;
- ctl_port = ATA_SECONDARY_CTL;
- }
-
- /* request cmd_port */
- if (request_region(cmd_port, 8, "libata"))
- legacy_dr->cmd_port[port_no] = cmd_port;
- else {
- dev_printk(KERN_WARNING, host->dev,
- "0x%0lX IDE port busy\n", cmd_port);
- return -EBUSY;
- }
-
- /* iomap cmd and ctl ports */
- legacy_dr->cmd_addr[port_no] = ioport_map(cmd_port, 8);
- legacy_dr->ctl_addr[port_no] = ioport_map(ctl_port, 1);
- if (!legacy_dr->cmd_addr[port_no] || !legacy_dr->ctl_addr[port_no]) {
- dev_printk(KERN_WARNING, host->dev,
- "failed to map cmd/ctl ports\n");
- return -ENOMEM;
- }
-
- /* init IO addresses */
- ap->ioaddr.cmd_addr = legacy_dr->cmd_addr[port_no];
- ap->ioaddr.altstatus_addr = legacy_dr->ctl_addr[port_no];
- ap->ioaddr.ctl_addr = legacy_dr->ctl_addr[port_no];
- ata_std_ports(&ap->ioaddr);
-
- return 0;
-}
-
-/**
- * ata_init_legacy_host - acquire legacy ATA resources and init ATA host
- * @host: target ATA host
- * @was_busy: out parameter, indicates whether any port was busy
- *
- * Acquire legacy ATA resources for the first two ports of @host
- * and initialize it accordingly. Ports marked dummy are skipped
- * and resource acquistion failure makes the port dummy.
- *
- * LOCKING:
- * Inherited from calling layer (may sleep).
- *
- * RETURNS:
- * 0 if at least one port is initialized, -ENODEV if no port is
- * available.
- */
-static int ata_init_legacy_host(struct ata_host *host, int *was_busy)
-{
- struct device *gdev = host->dev;
- struct ata_legacy_devres *legacy_dr;
- int i, rc;
-
- if (!devres_open_group(gdev, NULL, GFP_KERNEL))
- return -ENOMEM;
-
- rc = -ENOMEM;
- legacy_dr = devres_alloc(ata_legacy_release, sizeof(*legacy_dr),
- GFP_KERNEL);
- if (!legacy_dr)
- goto err_out;
- devres_add(gdev, legacy_dr);
-
- for (i = 0; i < 2; i++) {
- if (ata_port_is_dummy(host->ports[i]))
- continue;
-
- rc = ata_init_legacy_port(host->ports[i], legacy_dr);
- if (rc == 0)
- legacy_dr->mask |= 1 << i;
- else {
- if (rc == -EBUSY)
- (*was_busy)++;
- host->ports[i]->ops = &ata_dummy_port_ops;
- }
- }
-
- if (!legacy_dr->mask) {
- dev_printk(KERN_ERR, gdev, "no available legacy port\n");
- return -ENODEV;
- }
-
- devres_remove_group(gdev, NULL);
- return 0;
-
- err_out:
- devres_release_group(gdev, NULL);
- return rc;
-}
-
-/**
- * ata_request_legacy_irqs - request legacy ATA IRQs
- * @host: target ATA host
- * @handler: array of IRQ handlers
- * @irq_flags: array of IRQ flags
- * @dev_id: array of IRQ dev_ids
- *
- * Request legacy IRQs for non-dummy legacy ports in @host. All
- * IRQ parameters are passed as array to allow ports to have
- * separate IRQ handlers.
- *
- * LOCKING:
- * Inherited from calling layer (may sleep).
- *
- * RETURNS:
- * 0 on success, -errno otherwise.
- */
-static int ata_request_legacy_irqs(struct ata_host *host,
- irq_handler_t const *handler,
- const unsigned int *irq_flags,
- void * const *dev_id)
-{
- struct device *gdev = host->dev;
- struct ata_legacy_devres *legacy_dr;
- int i, rc;
-
- legacy_dr = devres_find(host->dev, ata_legacy_release, NULL, NULL);
- BUG_ON(!legacy_dr);
-
- for (i = 0; i < 2; i++) {
- unsigned int irq;
-
- /* FIXME: ATA_*_IRQ() should take generic device not pci_dev */
- if (i == 0)
- irq = ATA_PRIMARY_IRQ(to_pci_dev(gdev));
- else
- irq = ATA_SECONDARY_IRQ(to_pci_dev(gdev));
-
- if (!(legacy_dr->mask & (1 << i)))
- continue;
-
- if (!handler[i]) {
- dev_printk(KERN_ERR, gdev,
- "NULL handler specified for port %d\n", i);
- rc = -EINVAL;
- goto err_out;
- }
-
- rc = request_irq(irq, handler[i], irq_flags[i], DRV_NAME,
- dev_id[i]);
- if (rc) {
- dev_printk(KERN_ERR, gdev,
- "irq %u request failed (errno=%d)\n", irq, rc);
- goto err_out;
- }
-
- /* record irq allocation in legacy_dr */
- legacy_dr->irq[i] = irq;
- legacy_dr->irq_dev_id[i] = dev_id[i];
-
- /* only used to print info */
- if (i == 0)
- host->irq = irq;
- else
- host->irq2 = irq;
- }
-
- return 0;
-
- err_out:
- ata_legacy_free_irqs(legacy_dr);
- return rc;
-}
-
/**
* ata_pci_init_one - Initialize/register PCI IDE host controller
* @pdev: Controller to be initialized
#endif
}
- /* alloc and init host */
- host = ata_host_alloc_pinfo(dev, ppi, 2);
- if (!host) {
- dev_printk(KERN_ERR, &pdev->dev,
- "failed to allocate ATA host\n");
- rc = -ENOMEM;
+ /* prepare host */
+ rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
+ if (rc)
goto err_out;
- }
- if (!legacy_mode) {
- rc = ata_pci_init_native_host(host);
- if (rc)
- goto err_out;
- } else {
- int was_busy = 0;
-
- rc = ata_init_legacy_host(host, &was_busy);
- if (was_busy)
- pcim_pin_device(pdev);
- if (rc)
- goto err_out;
-
- /* request respective PCI regions, may fail */
- rc = pci_request_region(pdev, 1, DRV_NAME);
- rc = pci_request_region(pdev, 3, DRV_NAME);
- }
-
- /* init BMDMA, may fail */
- ata_pci_init_bmdma(host);
pci_set_master(pdev);
/* start host and request IRQ */
if (rc)
goto err_out;
- if (!legacy_mode)
+ if (!legacy_mode) {
rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler,
IRQF_SHARED, DRV_NAME, host);
- else {
- irq_handler_t handler[2] = { host->ops->irq_handler,
- host->ops->irq_handler };
- unsigned int irq_flags[2] = { IRQF_SHARED, IRQF_SHARED };
- void *dev_id[2] = { host, host };
+ if (rc)
+ goto err_out;
+ host->irq = pdev->irq;
+ } else {
+ if (!ata_port_is_dummy(host->ports[0])) {
+ host->irq = ATA_PRIMARY_IRQ(pdev);
+ rc = devm_request_irq(dev, host->irq,
+ pi->port_ops->irq_handler,
+ IRQF_SHARED, DRV_NAME, host);
+ if (rc)
+ goto err_out;
+ }
- rc = ata_request_legacy_irqs(host, handler, irq_flags, dev_id);
+ if (!ata_port_is_dummy(host->ports[1])) {
+ host->irq2 = ATA_SECONDARY_IRQ(pdev);
+ rc = devm_request_irq(dev, host->irq2,
+ pi->port_ops->irq_handler,
+ IRQF_SHARED, DRV_NAME, host);
+ if (rc)
+ goto err_out;
+ }
}
- if (rc)
- goto err_out;
/* register */
rc = ata_host_register(host, pi->sht);
git.samba.org / sfrench / cifs-2.6.git / blobdiff