diff options
Diffstat (limited to 'drivers/ata/ahci_platform.c')
-rw-r--r-- | drivers/ata/ahci_platform.c | 515 |
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); |