diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-pci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-pci.c | 182 |
1 files changed, 181 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c index 4487b8430aaf..f49b184308c0 100644 --- a/drivers/mmc/host/sdhci-pci.c +++ b/drivers/mmc/host/sdhci-pci.c @@ -24,6 +24,7 @@ #include <linux/io.h> #include <linux/gpio.h> #include <linux/sfi.h> +#include <linux/pm_runtime.h> #include "sdhci.h" @@ -63,6 +64,8 @@ struct sdhci_pci_slot { int pci_bar; int rst_n_gpio; + int cd_gpio; + int cd_irq; }; struct sdhci_pci_chip { @@ -190,6 +193,70 @@ static int mfd_emmc_gpio_parse(struct sfi_table_header *table) return 0; } +#ifdef CONFIG_PM_RUNTIME + +static irqreturn_t mfd_sd_cd(int irq, void *dev_id) +{ + struct sdhci_pci_slot *slot = dev_id; + struct sdhci_host *host = slot->host; + + mmc_detect_change(host->mmc, msecs_to_jiffies(200)); + return IRQ_HANDLED; +} + +#define MFLD_SD_CD_PIN 69 + +static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot) +{ + int err, irq, gpio = MFLD_SD_CD_PIN; + + slot->cd_gpio = -EINVAL; + slot->cd_irq = -EINVAL; + + err = gpio_request(gpio, "sd_cd"); + if (err < 0) + goto out; + + err = gpio_direction_input(gpio); + if (err < 0) + goto out_free; + + irq = gpio_to_irq(gpio); + if (irq < 0) + goto out_free; + + err = request_irq(irq, mfd_sd_cd, IRQF_TRIGGER_RISING | + IRQF_TRIGGER_FALLING, "sd_cd", slot); + if (err) + goto out_free; + + slot->cd_gpio = gpio; + slot->cd_irq = irq; + slot->host->quirks2 |= SDHCI_QUIRK2_OWN_CARD_DETECTION; + + return 0; + +out_free: + gpio_free(gpio); +out: + dev_warn(&slot->chip->pdev->dev, "failed to setup card detect wake up\n"); + return 0; +} + +static void mfd_sd_remove_slot(struct sdhci_pci_slot *slot, int dead) +{ + if (slot->cd_irq >= 0) + free_irq(slot->cd_irq, slot); + gpio_free(slot->cd_gpio); +} + +#else + +#define mfd_sd_probe_slot NULL +#define mfd_sd_remove_slot NULL + +#endif + static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) { const char *name = NULL; @@ -214,7 +281,7 @@ static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot) slot->host->mmc->caps |= MMC_CAP_HW_RESET; } - slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA; + slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE; slot->host->mmc->caps2 = MMC_CAP2_BOOTPART_NOACC; @@ -238,6 +305,8 @@ static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = { static const struct sdhci_pci_fixes sdhci_intel_mfd_sd = { .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, + .probe_slot = mfd_sd_probe_slot, + .remove_slot = mfd_sd_remove_slot, }; static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = { @@ -1018,6 +1087,95 @@ static int sdhci_pci_resume(struct pci_dev *pdev) #endif /* CONFIG_PM */ +#ifdef CONFIG_PM_RUNTIME + +static int sdhci_pci_runtime_suspend(struct device *dev) +{ + struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); + struct sdhci_pci_chip *chip; + struct sdhci_pci_slot *slot; + pm_message_t state = { .event = PM_EVENT_SUSPEND }; + int i, ret; + + chip = pci_get_drvdata(pdev); + if (!chip) + return 0; + + for (i = 0; i < chip->num_slots; i++) { + slot = chip->slots[i]; + if (!slot) + continue; + + ret = sdhci_runtime_suspend_host(slot->host); + + if (ret) { + for (i--; i >= 0; i--) + sdhci_runtime_resume_host(chip->slots[i]->host); + return ret; + } + } + + if (chip->fixes && chip->fixes->suspend) { + ret = chip->fixes->suspend(chip, state); + if (ret) { + for (i = chip->num_slots - 1; i >= 0; i--) + sdhci_runtime_resume_host(chip->slots[i]->host); + return ret; + } + } + + return 0; +} + +static int sdhci_pci_runtime_resume(struct device *dev) +{ + struct pci_dev *pdev = container_of(dev, struct pci_dev, dev); + struct sdhci_pci_chip *chip; + struct sdhci_pci_slot *slot; + int i, ret; + + chip = pci_get_drvdata(pdev); + if (!chip) + return 0; + + if (chip->fixes && chip->fixes->resume) { + ret = chip->fixes->resume(chip); + if (ret) + return ret; + } + + for (i = 0; i < chip->num_slots; i++) { + slot = chip->slots[i]; + if (!slot) + continue; + + ret = sdhci_runtime_resume_host(slot->host); + if (ret) + return ret; + } + + return 0; +} + +static int sdhci_pci_runtime_idle(struct device *dev) +{ + return 0; +} + +#else + +#define sdhci_pci_runtime_suspend NULL +#define sdhci_pci_runtime_resume NULL +#define sdhci_pci_runtime_idle NULL + +#endif + +static const struct dev_pm_ops sdhci_pci_pm_ops = { + .runtime_suspend = sdhci_pci_runtime_suspend, + .runtime_resume = sdhci_pci_runtime_resume, + .runtime_idle = sdhci_pci_runtime_idle, +}; + /*****************************************************************************\ * * * Device probing/removal * @@ -1133,6 +1291,21 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot) sdhci_free_host(slot->host); } +static void __devinit sdhci_pci_runtime_pm_allow(struct device *dev) +{ + pm_runtime_put_noidle(dev); + pm_runtime_allow(dev); + pm_runtime_set_autosuspend_delay(dev, 50); + pm_runtime_use_autosuspend(dev); + pm_suspend_ignore_children(dev, 1); +} + +static void __devexit sdhci_pci_runtime_pm_forbid(struct device *dev) +{ + pm_runtime_forbid(dev); + pm_runtime_get_noresume(dev); +} + static int __devinit sdhci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { @@ -1208,6 +1381,8 @@ static int __devinit sdhci_pci_probe(struct pci_dev *pdev, chip->slots[i] = slot; } + sdhci_pci_runtime_pm_allow(&pdev->dev); + return 0; free: @@ -1224,6 +1399,8 @@ static void __devexit sdhci_pci_remove(struct pci_dev *pdev) int i; struct sdhci_pci_chip *chip; + sdhci_pci_runtime_pm_forbid(&pdev->dev); + chip = pci_get_drvdata(pdev); if (chip) { @@ -1244,6 +1421,9 @@ static struct pci_driver sdhci_driver = { .remove = __devexit_p(sdhci_pci_remove), .suspend = sdhci_pci_suspend, .resume = sdhci_pci_resume, + .driver = { + .pm = &sdhci_pci_pm_ops + }, }; /*****************************************************************************\ |