* any later version.
*/
-#include <linux/clk.h>
#include <linux/kernel.h>
-#include <linux/gfp.h>
#include <linux/module.h>
#include <linux/pm.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
#include "ahci.h"
-static void ahci_host_stop(struct ata_host *host);
-
-enum ahci_type {
- AHCI, /* standard platform ahci */
- IMX53_AHCI, /* ahci on i.mx53 */
- STRICT_AHCI, /* delayed DMA engine start */
-};
-
-static struct platform_device_id ahci_devtype[] = {
- {
- .name = "ahci",
- .driver_data = AHCI,
- }, {
- .name = "imx53-ahci",
- .driver_data = IMX53_AHCI,
- }, {
- .name = "strict-ahci",
- .driver_data = STRICT_AHCI,
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(platform, ahci_devtype);
-
-struct ata_port_operations ahci_platform_ops = {
- .inherits = &ahci_ops,
- .host_stop = ahci_host_stop,
-};
-EXPORT_SYMBOL_GPL(ahci_platform_ops);
-
-static struct ata_port_operations ahci_platform_retry_srst_ops = {
- .inherits = &ahci_pmp_retry_srst_ops,
- .host_stop = ahci_host_stop,
-};
-
-static const struct ata_port_info ahci_port_info[] = {
- /* by features */
- [AHCI] = {
- .flags = AHCI_FLAG_COMMON,
- .pio_mask = ATA_PIO4,
- .udma_mask = ATA_UDMA6,
- .port_ops = &ahci_platform_ops,
- },
- [IMX53_AHCI] = {
- .flags = AHCI_FLAG_COMMON,
- .pio_mask = ATA_PIO4,
- .udma_mask = ATA_UDMA6,
- .port_ops = &ahci_platform_retry_srst_ops,
- },
- [STRICT_AHCI] = {
- AHCI_HFLAGS (AHCI_HFLAG_DELAY_ENGINE),
- .flags = AHCI_FLAG_COMMON,
- .pio_mask = ATA_PIO4,
- .udma_mask = ATA_UDMA6,
- .port_ops = &ahci_platform_ops,
- },
-};
-
-static struct scsi_host_template ahci_platform_sht = {
- AHCI_SHT("ahci_platform"),
+static const struct ata_port_info ahci_port_info = {
+ .flags = AHCI_FLAG_COMMON,
+ .pio_mask = ATA_PIO4,
+ .udma_mask = ATA_UDMA6,
+ .port_ops = &ahci_platform_ops,
};
static int ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct ahci_platform_data *pdata = dev_get_platdata(dev);
- const struct platform_device_id *id = platform_get_device_id(pdev);
- struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
- const struct ata_port_info *ppi[] = { &pi, NULL };
struct ahci_host_priv *hpriv;
- struct ata_host *host;
- struct resource *mem;
- int irq;
- int n_ports;
- int i;
int rc;
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!mem) {
- dev_err(dev, "no mmio space\n");
- return -EINVAL;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_err(dev, "no irq\n");
- return -EINVAL;
- }
-
- if (pdata && pdata->ata_port_info)
- pi = *pdata->ata_port_info;
-
- hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
- if (!hpriv) {
- dev_err(dev, "can't alloc ahci_host_priv\n");
- return -ENOMEM;
- }
-
- hpriv->flags |= (unsigned long)pi.private_data;
-
- hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
- if (!hpriv->mmio) {
- dev_err(dev, "can't map %pR\n", mem);
- return -ENOMEM;
- }
+ hpriv = ahci_platform_get_resources(pdev);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
- hpriv->clk = clk_get(dev, NULL);
- if (IS_ERR(hpriv->clk)) {
- dev_err(dev, "can't get clock\n");
- } else {
- rc = clk_prepare_enable(hpriv->clk);
- if (rc) {
- dev_err(dev, "clock prepare enable failed");
- goto free_clk;
- }
- }
+ rc = ahci_platform_enable_resources(hpriv);
+ if (rc)
+ return rc;
/*
* Some platforms might need to prepare for mmio region access,
if (pdata && pdata->init) {
rc = pdata->init(dev, hpriv->mmio);
if (rc)
- goto disable_unprepare_clk;
- }
-
- ahci_save_initial_config(dev, hpriv,
- pdata ? pdata->force_port_map : 0,
- pdata ? pdata->mask_port_map : 0);
-
- /* prepare host */
- if (hpriv->cap & HOST_CAP_NCQ)
- pi.flags |= ATA_FLAG_NCQ;
-
- if (hpriv->cap & HOST_CAP_PMP)
- pi.flags |= ATA_FLAG_PMP;
-
- ahci_set_em_messages(hpriv, &pi);
-
- /* CAP.NP sometimes indicate the index of the last enabled
- * port, at other times, that of the last possible port, so
- * determining the maximum port number requires looking at
- * both CAP.NP and port_map.
- */
- n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
-
- host = ata_host_alloc_pinfo(dev, ppi, n_ports);
- if (!host) {
- rc = -ENOMEM;
- goto pdata_exit;
- }
-
- host->private_data = hpriv;
-
- if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
- host->flags |= ATA_HOST_PARALLEL_SCAN;
- else
- dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
-
- if (pi.flags & ATA_FLAG_EM)
- ahci_reset_em(host);
-
- for (i = 0; i < host->n_ports; i++) {
- struct ata_port *ap = host->ports[i];
-
- ata_port_desc(ap, "mmio %pR", mem);
- ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
-
- /* set enclosure management message type */
- if (ap->flags & ATA_FLAG_EM)
- ap->em_message_type = hpriv->em_msg_type;
-
- /* disabled/not-implemented port */
- if (!(hpriv->port_map & (1 << i)))
- ap->ops = &ata_dummy_port_ops;
+ goto disable_resources;
}
- rc = ahci_reset_controller(host);
- if (rc)
- goto pdata_exit;
-
- ahci_init_controller(host);
- ahci_print_info(host, "platform");
-
- rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
- &ahci_platform_sht);
+ rc = ahci_platform_init_host(pdev, hpriv, &ahci_port_info, 0, 0);
if (rc)
goto pdata_exit;
pdata_exit:
if (pdata && pdata->exit)
pdata->exit(dev);
-disable_unprepare_clk:
- if (!IS_ERR(hpriv->clk))
- clk_disable_unprepare(hpriv->clk);
-free_clk:
- if (!IS_ERR(hpriv->clk))
- clk_put(hpriv->clk);
- return rc;
-}
-
-static void ahci_host_stop(struct ata_host *host)
-{
- struct device *dev = host->dev;
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
-
- if (pdata && pdata->exit)
- pdata->exit(dev);
-
- if (!IS_ERR(hpriv->clk)) {
- clk_disable_unprepare(hpriv->clk);
- clk_put(hpriv->clk);
- }
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int ahci_suspend(struct device *dev)
-{
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- void __iomem *mmio = hpriv->mmio;
- u32 ctl;
- int rc;
-
- if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
- dev_err(dev, "firmware update required for suspend/resume\n");
- return -EIO;
- }
-
- /*
- * AHCI spec rev1.1 section 8.3.3:
- * Software must disable interrupts prior to requesting a
- * transition of the HBA to D3 state.
- */
- ctl = readl(mmio + HOST_CTL);
- ctl &= ~HOST_IRQ_EN;
- writel(ctl, mmio + HOST_CTL);
- readl(mmio + HOST_CTL); /* flush */
-
- rc = ata_host_suspend(host, PMSG_SUSPEND);
- if (rc)
- return rc;
-
- if (pdata && pdata->suspend)
- return pdata->suspend(dev);
-
- if (!IS_ERR(hpriv->clk))
- clk_disable_unprepare(hpriv->clk);
-
- return 0;
-}
-
-static int ahci_resume(struct device *dev)
-{
- struct ahci_platform_data *pdata = dev_get_platdata(dev);
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- int rc;
-
- if (!IS_ERR(hpriv->clk)) {
- rc = clk_prepare_enable(hpriv->clk);
- if (rc) {
- dev_err(dev, "clock prepare enable failed");
- return rc;
- }
- }
-
- if (pdata && pdata->resume) {
- rc = pdata->resume(dev);
- if (rc)
- goto disable_unprepare_clk;
- }
-
- if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
- rc = ahci_reset_controller(host);
- if (rc)
- goto disable_unprepare_clk;
-
- ahci_init_controller(host);
- }
-
- ata_host_resume(host);
-
- return 0;
-
-disable_unprepare_clk:
- if (!IS_ERR(hpriv->clk))
- clk_disable_unprepare(hpriv->clk);
-
+disable_resources:
+ ahci_platform_disable_resources(hpriv);
return rc;
}
-#endif
-static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume);
+static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
+ ahci_platform_resume);
static const struct of_device_id ahci_of_match[] = {
{ .compatible = "snps,spear-ahci", },
{ .compatible = "snps,exynos5440-ahci", },
{ .compatible = "ibm,476gtr-ahci", },
+ { .compatible = "snps,dwc-ahci", },
{},
};
MODULE_DEVICE_TABLE(of, ahci_of_match);
.of_match_table = ahci_of_match,
.pm = &ahci_pm_ops,
},
- .id_table = ahci_devtype,
};
module_platform_driver(ahci_driver);
projects / cascardo / linux.git / blobdiff