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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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#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 <linux/of.h>#include <linux/of_platform.h>#include <linux/reset.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);
/** * ahci_platform_enable_phys - Enable PHYs * @hpriv: host private area to store config values * * This function enables all the PHYs found in hpriv->phys, if any. * If a PHY fails to be enabled, it disables all the PHYs already * enabled in reverse order and returns an error. * * RETURNS: * 0 on success otherwise a negative error code */int ahci_platform_enable_phys(struct ahci_host_priv *hpriv){ int rc, i;
for (i = 0; i < hpriv->nports; i++) { if (ahci_ignore_port(hpriv, i)) continue;
rc = phy_init(hpriv->phys[i]); if (rc) goto disable_phys;
rc = phy_set_mode(hpriv->phys[i], PHY_MODE_SATA); if (rc) { phy_exit(hpriv->phys[i]); goto disable_phys; }
rc = phy_power_on(hpriv->phys[i]); if (rc) { phy_exit(hpriv->phys[i]); goto disable_phys; } }
return 0;
disable_phys: while (--i >= 0) { if (ahci_ignore_port(hpriv, i)) continue;
phy_power_off(hpriv->phys[i]); phy_exit(hpriv->phys[i]); } return rc;}EXPORT_SYMBOL_GPL(ahci_platform_enable_phys);
/** * ahci_platform_disable_phys - Disable PHYs * @hpriv: host private area to store config values * * This function disables all PHYs found in hpriv->phys. */void ahci_platform_disable_phys(struct ahci_host_priv *hpriv){ int i;
for (i = 0; i < hpriv->nports; i++) { if (ahci_ignore_port(hpriv, i)) continue;
phy_power_off(hpriv->phys[i]); phy_exit(hpriv->phys[i]); }}EXPORT_SYMBOL_GPL(ahci_platform_disable_phys);
/** * ahci_platform_find_clk - Find platform clock * @hpriv: host private area to store config values * @con_id: clock connection ID * * This function returns a pointer to the clock descriptor of the clock with * the passed ID. * * RETURNS: * Pointer to the clock descriptor on success otherwise NULL */struct clk *ahci_platform_find_clk(struct ahci_host_priv *hpriv, const char *con_id){ int i;
for (i = 0; i < hpriv->n_clks; i++) { if (hpriv->clks[i].id && !strcmp(hpriv->clks[i].id, con_id)) return hpriv->clks[i].clk; }
return NULL;}EXPORT_SYMBOL_GPL(ahci_platform_find_clk);
/** * ahci_platform_enable_clks - Enable platform clocks * @hpriv: host private area to store config values * * This function enables all the clks found for the AHCI device. * * RETURNS: * 0 on success otherwise a negative error code */int ahci_platform_enable_clks(struct ahci_host_priv *hpriv){ return clk_bulk_prepare_enable(hpriv->n_clks, hpriv->clks);}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 clocks enabled before * (bulk-clocks-disable function is supposed to do that in reverse * from the enabling procedure order). */void ahci_platform_disable_clks(struct ahci_host_priv *hpriv){ clk_bulk_disable_unprepare(hpriv->n_clks, hpriv->clks);}EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
/** * ahci_platform_deassert_rsts - Deassert/trigger platform resets * @hpriv: host private area to store config values * * This function deasserts or triggers all the reset lines found for * the AHCI device. * * RETURNS: * 0 on success otherwise a negative error code */int ahci_platform_deassert_rsts(struct ahci_host_priv *hpriv){ if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER) return reset_control_reset(hpriv->rsts);
return reset_control_deassert(hpriv->rsts);}EXPORT_SYMBOL_GPL(ahci_platform_deassert_rsts);
/** * ahci_platform_assert_rsts - Assert/rearm platform resets * @hpriv: host private area to store config values * * This function asserts or rearms (for self-deasserting resets) all * the reset controls found for the AHCI device. * * RETURNS: * 0 on success otherwise a negative error code */int ahci_platform_assert_rsts(struct ahci_host_priv *hpriv){ if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER) return reset_control_rearm(hpriv->rsts);
return reset_control_assert(hpriv->rsts);}EXPORT_SYMBOL_GPL(ahci_platform_assert_rsts);
/** * ahci_platform_enable_regulators - Enable regulators * @hpriv: host private area to store config values * * This function enables all the regulators found in controller and * hpriv->target_pwrs, if any. If a regulator fails to be enabled, it * disables all the regulators already enabled in reverse order and * returns an error. * * RETURNS: * 0 on success otherwise a negative error code */int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv){ int rc, i;
rc = regulator_enable(hpriv->ahci_regulator); if (rc) return rc;
rc = regulator_enable(hpriv->phy_regulator); if (rc) goto disable_ahci_pwrs;
for (i = 0; i < hpriv->nports; i++) { if (!hpriv->target_pwrs[i]) continue;
rc = regulator_enable(hpriv->target_pwrs[i]); if (rc) goto disable_target_pwrs; }
return 0;
disable_target_pwrs: while (--i >= 0) if (hpriv->target_pwrs[i]) regulator_disable(hpriv->target_pwrs[i]);
regulator_disable(hpriv->phy_regulator);disable_ahci_pwrs: regulator_disable(hpriv->ahci_regulator); return rc;}EXPORT_SYMBOL_GPL(ahci_platform_enable_regulators);
/** * ahci_platform_disable_regulators - Disable regulators * @hpriv: host private area to store config values * * This function disables all regulators found in hpriv->target_pwrs and * AHCI controller. */void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv){ int i;
for (i = 0; i < hpriv->nports; i++) { if (!hpriv->target_pwrs[i]) continue; regulator_disable(hpriv->target_pwrs[i]); }
regulator_disable(hpriv->ahci_regulator); regulator_disable(hpriv->phy_regulator);}EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);/** * 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) Resets * 4) Phys * * 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;
rc = ahci_platform_enable_regulators(hpriv); if (rc) return rc;
rc = ahci_platform_enable_clks(hpriv); if (rc) goto disable_regulator;
rc = ahci_platform_deassert_rsts(hpriv); if (rc) goto disable_clks;
rc = ahci_platform_enable_phys(hpriv); if (rc) goto disable_rsts;
return 0;
disable_rsts: ahci_platform_assert_rsts(hpriv);
disable_clks: ahci_platform_disable_clks(hpriv);
disable_regulator: ahci_platform_disable_regulators(hpriv);
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) Phys * 2) Resets * 3) Clocks (through ahci_platform_disable_clks) * 4) Regulator */void ahci_platform_disable_resources(struct ahci_host_priv *hpriv){ ahci_platform_disable_phys(hpriv);
ahci_platform_assert_rsts(hpriv);
ahci_platform_disable_clks(hpriv);
ahci_platform_disable_regulators(hpriv);}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); }
/* * The regulators are tied to child node device and not to the * SATA device itself. So we can't use devm for automatically * releasing them. We have to do it manually here. */ for (c = 0; c < hpriv->nports; c++) if (hpriv->target_pwrs && hpriv->target_pwrs[c]) regulator_put(hpriv->target_pwrs[c]);
kfree(hpriv->target_pwrs);}
static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port, struct device *dev, struct device_node *node){ int rc;
hpriv->phys[port] = devm_of_phy_get(dev, node, NULL);
if (!IS_ERR(hpriv->phys[port])) return 0;
rc = PTR_ERR(hpriv->phys[port]); switch (rc) { case -ENOSYS: /* No PHY support. Check if PHY is required. */ if (of_property_present(node, "phys")) { dev_err(dev, "couldn't get PHY in node %pOFn: ENOSYS\n", node); break; } fallthrough; case -ENODEV: /* continue normally */ hpriv->phys[port] = NULL; rc = 0; break; case -EPROBE_DEFER: /* Do not complain yet */ break;
default: dev_err(dev, "couldn't get PHY in node %pOFn: %d\n", node, rc);
break; }
return rc;}
static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port, struct device *dev){ struct regulator *target_pwr; int rc = 0;
target_pwr = regulator_get(dev, "target");
if (!IS_ERR(target_pwr)) hpriv->target_pwrs[port] = target_pwr; else rc = PTR_ERR(target_pwr);
return rc;}
static int ahci_platform_get_firmware(struct ahci_host_priv *hpriv, struct device *dev){ u32 port;
if (!of_property_read_u32(dev->of_node, "hba-cap", &hpriv->saved_cap)) hpriv->saved_cap &= (HOST_CAP_SSS | HOST_CAP_MPS);
of_property_read_u32(dev->of_node, "ports-implemented", &hpriv->saved_port_map);
for_each_child_of_node_scoped(dev->of_node, child) { if (!of_device_is_available(child)) continue;
if (of_property_read_u32(child, "reg", &port)) return -EINVAL;
if (!of_property_read_u32(child, "hba-port-cap", &hpriv->saved_port_cap[port])) hpriv->saved_port_cap[port] &= PORT_CMD_CAP; }
return 0;}
static u32 ahci_platform_find_max_port_id(struct device *dev){ u32 max_port = 0;
for_each_child_of_node_scoped(dev->of_node, child) { u32 port;
if (!of_property_read_u32(child, "reg", &port)) max_port = max(max_port, port); }
return max_port;}
/** * ahci_platform_get_resources - Get platform resources * @pdev: platform device to get resources for * @flags: bitmap representing the resource to get * * 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) * regulator for controlling the AHCI controller (optional) * 3) all clocks specified in the devicetree node, or a single * clock for non-OF platforms (optional) * 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional) * 5) phys (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, unsigned int flags){ int child_nodes, rc = -ENOMEM, enabled_ports = 0; struct device *dev = &pdev->dev; struct ahci_host_priv *hpriv; u32 mask_port_map = 0; u32 max_port; int nports;
if (!devres_open_group(dev, NULL, GFP_KERNEL)) return ERR_PTR(-ENOMEM);
/* find maximum port id for allocating structures */ max_port = ahci_platform_find_max_port_id(dev); /* * Set nports according to maximum port id. Clamp at * AHCI_MAX_PORTS, warning message for invalid port id * is generated later. * When DT has no sub-nodes max_port is 0, nports is 1, * in order to be able to use the * ahci_platform_[en|dis]able_[phys|regulators] functions. */ nports = min(AHCI_MAX_PORTS, max_port + 1); hpriv = devres_alloc(ahci_platform_put_resources, struct_size(hpriv, phys, nports), GFP_KERNEL); if (!hpriv) goto err_out;
hpriv->nports = nports;
devres_add(dev, hpriv);
/* * If the DT provided an "ahci" named resource, use it. Otherwise, * fallback to using the default first resource for the device node. */ if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahci")) hpriv->mmio = devm_platform_ioremap_resource_byname(pdev, "ahci"); else hpriv->mmio = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(hpriv->mmio)) { rc = PTR_ERR(hpriv->mmio); goto err_out; }
/* * Bulk clocks getting procedure can fail to find any clock due to * running on a non-OF platform or due to the clocks being defined in * bypass of the DT firmware (like da850, spear13xx). In that case we * fallback to getting a single clock source right from the dev clocks * list. */ rc = devm_clk_bulk_get_all(dev, &hpriv->clks); if (rc < 0) goto err_out;
if (rc > 0) { /* Got clocks in bulk */ hpriv->n_clks = rc; } else { /* * No clock bulk found: fallback to manually getting * the optional clock. */ hpriv->clks = devm_kzalloc(dev, sizeof(*hpriv->clks), GFP_KERNEL); if (!hpriv->clks) { rc = -ENOMEM; goto err_out; } hpriv->clks->clk = devm_clk_get_optional(dev, NULL); if (IS_ERR(hpriv->clks->clk)) { rc = PTR_ERR(hpriv->clks->clk); goto err_out; } else if (hpriv->clks->clk) { hpriv->clks->id = "ahci"; hpriv->n_clks = 1; } }
hpriv->ahci_regulator = devm_regulator_get(dev, "ahci"); if (IS_ERR(hpriv->ahci_regulator)) { rc = PTR_ERR(hpriv->ahci_regulator); if (rc != 0) goto err_out; }
hpriv->phy_regulator = devm_regulator_get(dev, "phy"); if (IS_ERR(hpriv->phy_regulator)) { rc = PTR_ERR(hpriv->phy_regulator); goto err_out; }
if (flags & AHCI_PLATFORM_GET_RESETS) { hpriv->rsts = devm_reset_control_array_get_optional_shared(dev); if (IS_ERR(hpriv->rsts)) { rc = PTR_ERR(hpriv->rsts); goto err_out; }
hpriv->f_rsts = flags & AHCI_PLATFORM_RST_TRIGGER; }
/* * Too many sub-nodes most likely means having something wrong with * the firmware. */ child_nodes = of_get_child_count(dev->of_node); if (child_nodes > AHCI_MAX_PORTS) { rc = -EINVAL; goto err_out; }
/* * We cannot use devm_ here, since ahci_platform_put_resources() uses * target_pwrs after devm_ have freed memory */ hpriv->target_pwrs = kzalloc_objs(*hpriv->target_pwrs, hpriv->nports); if (!hpriv->target_pwrs) { rc = -ENOMEM; goto err_out; }
if (child_nodes) { for_each_child_of_node_scoped(dev->of_node, child) { u32 port; struct platform_device *port_dev __maybe_unused;
if (!of_device_is_available(child)) continue;
if (of_property_read_u32(child, "reg", &port)) { rc = -EINVAL; goto err_out; }
if (port >= hpriv->nports) { dev_warn(dev, "invalid port number %d\n", port); continue; } mask_port_map |= BIT(port);
#ifdef CONFIG_OF_ADDRESS of_platform_device_create(child, NULL, NULL);
port_dev = of_find_device_by_node(child); if (port_dev) { rc = ahci_platform_get_regulator(hpriv, port, &port_dev->dev); put_device(&port_dev->dev); if (rc == -EPROBE_DEFER) goto err_out; }#endif
rc = ahci_platform_get_phy(hpriv, port, dev, child); if (rc) goto err_out;
enabled_ports++; } if (!enabled_ports) { dev_warn(dev, "No port enabled\n"); rc = -ENODEV; goto err_out; }
if (!hpriv->mask_port_map) hpriv->mask_port_map = mask_port_map; } else { /* * If no sub-node was found, keep this for device tree * compatibility */ rc = ahci_platform_get_phy(hpriv, 0, dev, dev->of_node); if (rc) goto err_out;
rc = ahci_platform_get_regulator(hpriv, 0, dev); if (rc == -EPROBE_DEFER) goto err_out; }
/* * Retrieve firmware-specific flags which then will be used to set * the HW-init fields of HBA and its ports */ rc = ahci_platform_get_firmware(hpriv, dev); if (rc) 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 * @sht: scsi_host_template to use when registering * * This function does all the usual steps needed to bring up an * ahci-platform host, note any necessary resources (ie clks, phys, etc.) * must be initialized / enabled before calling this. * * On failure, ->host_stop() is not called, so the caller has to release the * resources it enabled (clocks, regulators, resets, PHYs) in its probe() * error path. * * 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, const struct scsi_host_template *sht){ 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) return irq; if (!irq) return -EINVAL;
hpriv->irq = irq;
/* prepare host */ pi.private_data = (void *)(unsigned long)hpriv->flags;
ahci_save_initial_config(dev, hpriv);
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; }
if (hpriv->cap & HOST_CAP_64) { rc = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); if (rc) { dev_err(dev, "Failed to enable 64-bit DMA.\n"); return rc; } }
rc = ahci_reset_controller(host); if (rc) return rc;
ahci_init_controller(host); ahci_print_info(host, "platform");
return ahci_host_activate(host, sht);}EXPORT_SYMBOL_GPL(ahci_platform_init_host);
static void ahci_host_stop(struct ata_host *host){ struct ahci_host_priv *hpriv = host->private_data;
ahci_platform_disable_resources(hpriv);}
/** * ahci_platform_shutdown - Disable interrupts and stop DMA for host ports * @pdev: platform device pointer for the host * * This function is called during system shutdown and performs the minimal * deconfiguration required to ensure that an ahci_platform host cannot * corrupt or otherwise interfere with a new kernel being started with kexec. */void ahci_platform_shutdown(struct platform_device *pdev){ struct ata_host *host = platform_get_drvdata(pdev); struct ahci_host_priv *hpriv = host->private_data; void __iomem *mmio = hpriv->mmio; int i;
for (i = 0; i < host->n_ports; i++) { struct ata_port *ap = host->ports[i];
/* Disable port interrupts */ if (ap->ops->freeze) ap->ops->freeze(ap);
/* Stop the port DMA engines */ if (ap->ops->port_stop) ap->ops->port_stop(ap); }
/* Disable and clear host interrupts */ writel(readl(mmio + HOST_CTL) & ~HOST_IRQ_EN, mmio + HOST_CTL); readl(mmio + HOST_CTL); /* flush */ writel(GENMASK(host->n_ports, 0), mmio + HOST_IRQ_STAT);}EXPORT_SYMBOL_GPL(ahci_platform_shutdown);
#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, phys, 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 */
if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS) ahci_platform_disable_phys(hpriv);
ata_host_suspend(host, PMSG_SUSPEND); return 0;}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, phys, 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); struct ahci_host_priv *hpriv = host->private_data; int rc;
if (dev->power.power_state.event == PM_EVENT_SUSPEND) { rc = ahci_reset_controller(host); if (rc) return rc;
ahci_init_controller(host); }
if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS) ahci_platform_enable_phys(hpriv);
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 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;
ahci_platform_disable_resources(hpriv);
return 0;}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 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;
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
MODULE_DESCRIPTION("AHCI SATA platform library");MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");MODULE_LICENSE("GPL");