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authorBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>2014-03-25 19:51:39 +0100
committerTejun Heo <tj@kernel.org>2014-03-25 15:17:13 -0400
commitfd990556f0fa25446c6bfa9cf4c9e49d387d4472 (patch)
tree0020bd48b0312034f1d84d4560e323961d052669 /drivers/ata/ahci_platform.c
parent83b03fd67b9b3fa3795871169f3c08c35b3d6ea8 (diff)
ata: move library code from ahci_platform.c to libahci_platform.c
Move AHCI platform library code from ahci_platform.c to libahci_platform.c and fix dependencies for ahci_st, ahci_imx and ahci_sunxi drivers. Acked-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/ata/ahci_platform.c')
-rw-r--r--drivers/ata/ahci_platform.c515
1 files changed, 0 insertions, 515 deletions
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 7bd6adf54b3e..ef67e79944f9 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -12,28 +12,15 @@
* 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/interrupt.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/libata.h>
#include <linux/ahci_platform.h>
-#include <linux/phy/phy.h>
-#include <linux/pm_runtime.h>
#include "ahci.h"
-static void ahci_host_stop(struct ata_host *host);
-
-struct ata_port_operations ahci_platform_ops = {
- .inherits = &ahci_ops,
- .host_stop = ahci_host_stop,
-};
-EXPORT_SYMBOL_GPL(ahci_platform_ops);
-
static const struct ata_port_info ahci_port_info = {
.flags = AHCI_FLAG_COMMON,
.pio_mask = ATA_PIO4,
@@ -41,345 +28,6 @@ static const struct ata_port_info ahci_port_info = {
.port_ops = &ahci_platform_ops,
};
-static struct scsi_host_template ahci_platform_sht = {
- AHCI_SHT("ahci_platform"),
-};
-
-/**
- * ahci_platform_enable_clks - Enable platform clocks
- * @hpriv: host private area to store config values
- *
- * This function enables all the clks found in hpriv->clks, starting at
- * index 0. If any clk fails to enable it disables all the clks already
- * enabled in reverse order, and then returns an error.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
-{
- int c, rc;
-
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
- rc = clk_prepare_enable(hpriv->clks[c]);
- if (rc)
- goto disable_unprepare_clk;
- }
- return 0;
-
-disable_unprepare_clk:
- while (--c >= 0)
- clk_disable_unprepare(hpriv->clks[c]);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
-
-/**
- * ahci_platform_disable_clks - Disable platform clocks
- * @hpriv: host private area to store config values
- *
- * This function disables all the clks found in hpriv->clks, in reverse
- * order of ahci_platform_enable_clks (starting at the end of the array).
- */
-void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
-{
- int c;
-
- for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
- if (hpriv->clks[c])
- clk_disable_unprepare(hpriv->clks[c]);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
-
-/**
- * ahci_platform_enable_resources - Enable platform resources
- * @hpriv: host private area to store config values
- *
- * This function enables all ahci_platform managed resources in the
- * following order:
- * 1) Regulator
- * 2) Clocks (through ahci_platform_enable_clks)
- * 3) Phy
- *
- * If resource enabling fails at any point the previous enabled resources
- * are disabled in reverse order.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
-{
- int rc;
-
- if (hpriv->target_pwr) {
- rc = regulator_enable(hpriv->target_pwr);
- if (rc)
- return rc;
- }
-
- rc = ahci_platform_enable_clks(hpriv);
- if (rc)
- goto disable_regulator;
-
- if (hpriv->phy) {
- rc = phy_init(hpriv->phy);
- if (rc)
- goto disable_clks;
-
- rc = phy_power_on(hpriv->phy);
- if (rc) {
- phy_exit(hpriv->phy);
- goto disable_clks;
- }
- }
-
- return 0;
-
-disable_clks:
- ahci_platform_disable_clks(hpriv);
-
-disable_regulator:
- if (hpriv->target_pwr)
- regulator_disable(hpriv->target_pwr);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
-
-/**
- * ahci_platform_disable_resources - Disable platform resources
- * @hpriv: host private area to store config values
- *
- * This function disables all ahci_platform managed resources in the
- * following order:
- * 1) Phy
- * 2) Clocks (through ahci_platform_disable_clks)
- * 3) Regulator
- */
-void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
-{
- if (hpriv->phy) {
- phy_power_off(hpriv->phy);
- phy_exit(hpriv->phy);
- }
-
- ahci_platform_disable_clks(hpriv);
-
- if (hpriv->target_pwr)
- regulator_disable(hpriv->target_pwr);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
-
-static void ahci_platform_put_resources(struct device *dev, void *res)
-{
- struct ahci_host_priv *hpriv = res;
- int c;
-
- if (hpriv->got_runtime_pm) {
- pm_runtime_put_sync(dev);
- pm_runtime_disable(dev);
- }
-
- for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
- clk_put(hpriv->clks[c]);
-}
-
-/**
- * ahci_platform_get_resources - Get platform resources
- * @pdev: platform device to get resources for
- *
- * This function allocates an ahci_host_priv struct, and gets the following
- * resources, storing a reference to them inside the returned struct:
- *
- * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
- * 2) regulator for controlling the targets power (optional)
- * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
- * or for non devicetree enabled platforms a single clock
- * 4) phy (optional)
- *
- * RETURNS:
- * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
- */
-struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ahci_host_priv *hpriv;
- struct clk *clk;
- int i, rc = -ENOMEM;
-
- if (!devres_open_group(dev, NULL, GFP_KERNEL))
- return ERR_PTR(-ENOMEM);
-
- hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
- GFP_KERNEL);
- if (!hpriv)
- goto err_out;
-
- devres_add(dev, hpriv);
-
- hpriv->mmio = devm_ioremap_resource(dev,
- platform_get_resource(pdev, IORESOURCE_MEM, 0));
- if (IS_ERR(hpriv->mmio)) {
- dev_err(dev, "no mmio space\n");
- rc = PTR_ERR(hpriv->mmio);
- goto err_out;
- }
-
- hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
- if (IS_ERR(hpriv->target_pwr)) {
- rc = PTR_ERR(hpriv->target_pwr);
- if (rc == -EPROBE_DEFER)
- goto err_out;
- hpriv->target_pwr = NULL;
- }
-
- for (i = 0; i < AHCI_MAX_CLKS; i++) {
- /*
- * For now we must use clk_get(dev, NULL) for the first clock,
- * because some platforms (da850, spear13xx) are not yet
- * converted to use devicetree for clocks. For new platforms
- * this is equivalent to of_clk_get(dev->of_node, 0).
- */
- if (i == 0)
- clk = clk_get(dev, NULL);
- else
- clk = of_clk_get(dev->of_node, i);
-
- if (IS_ERR(clk)) {
- rc = PTR_ERR(clk);
- if (rc == -EPROBE_DEFER)
- goto err_out;
- break;
- }
- hpriv->clks[i] = clk;
- }
-
- hpriv->phy = devm_phy_get(dev, "sata-phy");
- if (IS_ERR(hpriv->phy)) {
- rc = PTR_ERR(hpriv->phy);
- switch (rc) {
- case -ENODEV:
- case -ENOSYS:
- /* continue normally */
- hpriv->phy = NULL;
- break;
-
- case -EPROBE_DEFER:
- goto err_out;
-
- default:
- dev_err(dev, "couldn't get sata-phy\n");
- goto err_out;
- }
- }
-
- pm_runtime_enable(dev);
- pm_runtime_get_sync(dev);
- hpriv->got_runtime_pm = true;
-
- devres_remove_group(dev, NULL);
- return hpriv;
-
-err_out:
- devres_release_group(dev, NULL);
- return ERR_PTR(rc);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
-
-/**
- * ahci_platform_init_host - Bring up an ahci-platform host
- * @pdev: platform device pointer for the host
- * @hpriv: ahci-host private data for the host
- * @pi_template: template for the ata_port_info to use
- * @force_port_map: param passed to ahci_save_initial_config
- * @mask_port_map: param passed to ahci_save_initial_config
- *
- * This function does all the usual steps needed to bring up an
- * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
- * must be initialized / enabled before calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_init_host(struct platform_device *pdev,
- struct ahci_host_priv *hpriv,
- const struct ata_port_info *pi_template,
- unsigned int force_port_map,
- unsigned int mask_port_map)
-{
- struct device *dev = &pdev->dev;
- struct ata_port_info pi = *pi_template;
- const struct ata_port_info *ppi[] = { &pi, NULL };
- struct ata_host *host;
- int i, irq, n_ports, rc;
-
- irq = platform_get_irq(pdev, 0);
- if (irq <= 0) {
- dev_err(dev, "no irq\n");
- return -EINVAL;
- }
-
- /* prepare host */
- hpriv->flags |= (unsigned long)pi.private_data;
-
- ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
-
- 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)
- return -ENOMEM;
-
- 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",
- platform_get_resource(pdev, IORESOURCE_MEM, 0));
- 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;
- }
-
- rc = ahci_reset_controller(host);
- if (rc)
- return rc;
-
- ahci_init_controller(host);
- ahci_print_info(host, "platform");
-
- return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
- &ahci_platform_sht);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_init_host);
-
static int ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -420,169 +68,6 @@ disable_resources:
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);
-
- ahci_platform_disable_resources(hpriv);
-}
-
-#ifdef CONFIG_PM_SLEEP
-/**
- * ahci_platform_suspend_host - Suspend an ahci-platform host
- * @dev: device pointer for the host
- *
- * This function does all the usual steps needed to suspend an
- * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
- * must be disabled after calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_suspend_host(struct device *dev)
-{
- struct ata_host *host = dev_get_drvdata(dev);
- struct ahci_host_priv *hpriv = host->private_data;
- void __iomem *mmio = hpriv->mmio;
- u32 ctl;
-
- 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 */
-
- return ata_host_suspend(host, PMSG_SUSPEND);
-}
-EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
-
-/**
- * ahci_platform_resume_host - Resume an ahci-platform host
- * @dev: device pointer for the host
- *
- * This function does all the usual steps needed to resume an ahci-platform
- * host, note any necessary resources (ie clks, phy, etc.) must be
- * initialized / enabled before calling this.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_resume_host(struct device *dev)
-{
- struct ata_host *host = dev_get_drvdata(dev);
- int rc;
-
- if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
- rc = ahci_reset_controller(host);
- if (rc)
- return rc;
-
- ahci_init_controller(host);
- }
-
- ata_host_resume(host);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
-
-/**
- * ahci_platform_suspend - Suspend an ahci-platform device
- * @dev: the platform device to suspend
- *
- * This function suspends the host associated with the device, followed by
- * disabling all the resources of the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_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;
- int rc;
-
- rc = ahci_platform_suspend_host(dev);
- if (rc)
- return rc;
-
- if (pdata && pdata->suspend) {
- rc = pdata->suspend(dev);
- if (rc)
- goto resume_host;
- }
-
- ahci_platform_disable_resources(hpriv);
-
- return 0;
-
-resume_host:
- ahci_platform_resume_host(dev);
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_suspend);
-
-/**
- * ahci_platform_resume - Resume an ahci-platform device
- * @dev: the platform device to resume
- *
- * This function enables all the resources of the device followed by
- * resuming the host associated with the device.
- *
- * RETURNS:
- * 0 on success otherwise a negative error code
- */
-int ahci_platform_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;
-
- rc = ahci_platform_enable_resources(hpriv);
- if (rc)
- return rc;
-
- if (pdata && pdata->resume) {
- rc = pdata->resume(dev);
- if (rc)
- goto disable_resources;
- }
-
- rc = ahci_platform_resume_host(dev);
- if (rc)
- goto disable_resources;
-
- /* We resumed so update PM runtime state */
- pm_runtime_disable(dev);
- pm_runtime_set_active(dev);
- pm_runtime_enable(dev);
-
- return 0;
-
-disable_resources:
- ahci_platform_disable_resources(hpriv);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(ahci_platform_resume);
-#endif
-
static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
ahci_platform_resume);