/* * Secure Digital Host Controller Interface ACPI driver. * * Copyright (c) 2012, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * */ #include <linux/init.h> #include <linux/export.h> #include <linux/module.h> #include <linux/device.h> #include <linux/platform_device.h> #include <linux/ioport.h> #include <linux/io.h> #include <linux/dma-mapping.h> #include <linux/compiler.h> #include <linux/stddef.h> #include <linux/bitops.h> #include <linux/types.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/acpi.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #include <linux/delay.h> #include <linux/mmc/host.h> #include <linux/mmc/pm.h> #include <linux/mmc/slot-gpio.h> #include "sdhci.h" enum { SDHCI_ACPI_SD_CD = BIT(0), SDHCI_ACPI_RUNTIME_PM = BIT(1), SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2), }; struct sdhci_acpi_chip { const struct sdhci_ops *ops; unsigned int quirks; unsigned int quirks2; unsigned long caps; unsigned int caps2; mmc_pm_flag_t pm_caps; }; struct sdhci_acpi_slot { const struct sdhci_acpi_chip *chip; unsigned int quirks; unsigned int quirks2; unsigned long caps; unsigned int caps2; mmc_pm_flag_t pm_caps; unsigned int flags; int (*probe_slot)(struct platform_device *, const char *, const char *); int (*remove_slot)(struct platform_device *); }; struct sdhci_acpi_host { struct sdhci_host *host; const struct sdhci_acpi_slot *slot; struct platform_device *pdev; bool use_runtime_pm; bool dma_setup; }; static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) { return c->slot && (c->slot->flags & flag); } static int sdhci_acpi_enable_dma(struct sdhci_host *host) { struct sdhci_acpi_host *c = sdhci_priv(host); struct device *dev = &c->pdev->dev; int err = -1; if (c->dma_setup) return 0; if (host->flags & SDHCI_USE_64_BIT_DMA) { if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA) { host->flags &= ~SDHCI_USE_64_BIT_DMA; } else { err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)); if (err) dev_warn(dev, "Failed to set 64-bit DMA mask\n"); } } if (err) err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); c->dma_setup = !err; return err; } static void sdhci_acpi_int_hw_reset(struct sdhci_host *host) { u8 reg; reg = sdhci_readb(host, SDHCI_POWER_CONTROL); reg |= 0x10; sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); /* For eMMC, minimum is 1us but give it 9us for good measure */ udelay(9); reg &= ~0x10; sdhci_writeb(host, reg, SDHCI_POWER_CONTROL); /* For eMMC, minimum is 200us but give it 300us for good measure */ usleep_range(300, 1000); } static const struct sdhci_ops sdhci_acpi_ops_dflt = { .set_clock = sdhci_set_clock, .enable_dma = sdhci_acpi_enable_dma, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, }; static const struct sdhci_ops sdhci_acpi_ops_int = { .set_clock = sdhci_set_clock, .enable_dma = sdhci_acpi_enable_dma, .set_bus_width = sdhci_set_bus_width, .reset = sdhci_reset, .set_uhs_signaling = sdhci_set_uhs_signaling, .hw_reset = sdhci_acpi_int_hw_reset, }; static const struct sdhci_acpi_chip sdhci_acpi_chip_int = { .ops = &sdhci_acpi_ops_int, }; static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev, const char *hid, const char *uid) { struct sdhci_acpi_host *c = platform_get_drvdata(pdev); struct sdhci_host *host; if (!c || !c->host) return 0; host = c->host; /* Platform specific code during emmc probe slot goes here */ if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") && sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 && sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807) host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */ return 0; } static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev, const char *hid, const char *uid) { struct sdhci_acpi_host *c = platform_get_drvdata(pdev); struct sdhci_host *host; if (!c || !c->host) return 0; host = c->host; /* Platform specific code during sdio probe slot goes here */ return 0; } static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev, const char *hid, const char *uid) { struct sdhci_acpi_host *c = platform_get_drvdata(pdev); struct sdhci_host *host; if (!c || !c->host || !c->slot) return 0; host = c->host; /* Platform specific code during sd probe slot goes here */ return 0; } static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = { .chip = &sdhci_acpi_chip_int, .caps = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | MMC_CAP_HW_RESET | MMC_CAP_1_8V_DDR | MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY, .caps2 = MMC_CAP2_HC_ERASE_SZ, .flags = SDHCI_ACPI_RUNTIME_PM, .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_STOP_WITH_TC | SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400, .probe_slot = sdhci_acpi_emmc_probe_slot, }; static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = { .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION | SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON, .caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD | MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY, .flags = SDHCI_ACPI_RUNTIME_PM, .pm_caps = MMC_PM_KEEP_POWER, .probe_slot = sdhci_acpi_sdio_probe_slot, }; static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = { .flags = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL | SDHCI_ACPI_RUNTIME_PM, .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC, .quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON | SDHCI_QUIRK2_STOP_WITH_TC, .caps = MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY, .probe_slot = sdhci_acpi_sd_probe_slot, }; struct sdhci_acpi_uid_slot { const char *hid; const char *uid; const struct sdhci_acpi_slot *slot; }; static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = { { "80865ACA", NULL, &sdhci_acpi_slot_int_sd }, { "80865ACC", NULL, &sdhci_acpi_slot_int_emmc }, { "80865AD0", NULL, &sdhci_acpi_slot_int_sdio }, { "80860F14" , "1" , &sdhci_acpi_slot_int_emmc }, { "80860F14" , "3" , &sdhci_acpi_slot_int_sd }, { "80860F16" , NULL, &sdhci_acpi_slot_int_sd }, { "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio }, { "INT33BB" , "3" , &sdhci_acpi_slot_int_sd }, { "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio }, { "INT3436" , NULL, &sdhci_acpi_slot_int_sdio }, { "INT344D" , NULL, &sdhci_acpi_slot_int_sdio }, { "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd }, { "PNP0D40" }, { }, }; static const struct acpi_device_id sdhci_acpi_ids[] = { { "80865ACA" }, { "80865ACC" }, { "80865AD0" }, { "80860F14" }, { "80860F16" }, { "INT33BB" }, { "INT33C6" }, { "INT3436" }, { "INT344D" }, { "PNP0D40" }, { }, }; MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids); static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid, const char *uid) { const struct sdhci_acpi_uid_slot *u; for (u = sdhci_acpi_uids; u->hid; u++) { if (strcmp(u->hid, hid)) continue; if (!u->uid) return u->slot; if (uid && !strcmp(u->uid, uid)) return u->slot; } return NULL; } static int sdhci_acpi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; acpi_handle handle = ACPI_HANDLE(dev); struct acpi_device *device; struct sdhci_acpi_host *c; struct sdhci_host *host; struct resource *iomem; resource_size_t len; const char *hid; const char *uid; int err; if (acpi_bus_get_device(handle, &device)) return -ENODEV; if (acpi_bus_get_status(device) || !device->status.present) return -ENODEV; hid = acpi_device_hid(device); uid = device->pnp.unique_id; iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!iomem) return -ENOMEM; len = resource_size(iomem); if (len < 0x100) dev_err(dev, "Invalid iomem size!\n"); if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev))) return -ENOMEM; host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host)); if (IS_ERR(host)) return PTR_ERR(host); c = sdhci_priv(host); c->host = host; c->slot = sdhci_acpi_get_slot(hid, uid); c->pdev = pdev; c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM); platform_set_drvdata(pdev, c); host->hw_name = "ACPI"; host->ops = &sdhci_acpi_ops_dflt; host->irq = platform_get_irq(pdev, 0); host->ioaddr = devm_ioremap_nocache(dev, iomem->start, resource_size(iomem)); if (host->ioaddr == NULL) { err = -ENOMEM; goto err_free; } if (c->slot) { if (c->slot->probe_slot) { err = c->slot->probe_slot(pdev, hid, uid); if (err) goto err_free; } if (c->slot->chip) { host->ops = c->slot->chip->ops; host->quirks |= c->slot->chip->quirks; host->quirks2 |= c->slot->chip->quirks2; host->mmc->caps |= c->slot->chip->caps; host->mmc->caps2 |= c->slot->chip->caps2; host->mmc->pm_caps |= c->slot->chip->pm_caps; } host->quirks |= c->slot->quirks; host->quirks2 |= c->slot->quirks2; host->mmc->caps |= c->slot->caps; host->mmc->caps2 |= c->slot->caps2; host->mmc->pm_caps |= c->slot->pm_caps; } host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP; if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) { bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL); if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) { dev_warn(dev, "failed to setup card detect gpio\n"); c->use_runtime_pm = false; } } err = sdhci_add_host(host); if (err) goto err_free; if (c->use_runtime_pm) { pm_runtime_set_active(dev); pm_suspend_ignore_children(dev, 1); pm_runtime_set_autosuspend_delay(dev, 50); pm_runtime_use_autosuspend(dev); pm_runtime_enable(dev); } return 0; err_free: sdhci_free_host(c->host); return err; } static int sdhci_acpi_remove(struct platform_device *pdev) { struct sdhci_acpi_host *c = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; int dead; if (c->use_runtime_pm) { pm_runtime_get_sync(dev); pm_runtime_disable(dev); pm_runtime_put_noidle(dev); } if (c->slot && c->slot->remove_slot) c->slot->remove_slot(pdev); dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0); sdhci_remove_host(c->host, dead); sdhci_free_host(c->host); return 0; } #ifdef CONFIG_PM_SLEEP static int sdhci_acpi_suspend(struct device *dev) { struct sdhci_acpi_host *c = dev_get_drvdata(dev); return sdhci_suspend_host(c->host); } static int sdhci_acpi_resume(struct device *dev) { struct sdhci_acpi_host *c = dev_get_drvdata(dev); return sdhci_resume_host(c->host); } #else #define sdhci_acpi_suspend NULL #define sdhci_acpi_resume NULL #endif #ifdef CONFIG_PM static int sdhci_acpi_runtime_suspend(struct device *dev) { struct sdhci_acpi_host *c = dev_get_drvdata(dev); return sdhci_runtime_suspend_host(c->host); } static int sdhci_acpi_runtime_resume(struct device *dev) { struct sdhci_acpi_host *c = dev_get_drvdata(dev); return sdhci_runtime_resume_host(c->host); } #endif static const struct dev_pm_ops sdhci_acpi_pm_ops = { .suspend = sdhci_acpi_suspend, .resume = sdhci_acpi_resume, SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend, sdhci_acpi_runtime_resume, NULL) }; static struct platform_driver sdhci_acpi_driver = { .driver = { .name = "sdhci-acpi", .acpi_match_table = sdhci_acpi_ids, .pm = &sdhci_acpi_pm_ops, }, .probe = sdhci_acpi_probe, .remove = sdhci_acpi_remove, }; module_platform_driver(sdhci_acpi_driver); MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver"); MODULE_AUTHOR("Adrian Hunter"); MODULE_LICENSE("GPL v2");