| /* |
| * 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> |
| |
| #ifdef CONFIG_X86 |
| #include <asm/cpu_device_id.h> |
| #include <asm/iosf_mbi.h> |
| #endif |
| |
| #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; |
| }; |
| |
| static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) |
| { |
| return c->slot && (c->slot->flags & flag); |
| } |
| |
| 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, |
| .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, |
| .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, |
| }; |
| |
| #ifdef CONFIG_X86 |
| |
| static bool sdhci_acpi_byt(void) |
| { |
| static const struct x86_cpu_id byt[] = { |
| { X86_VENDOR_INTEL, 6, 0x37 }, |
| {} |
| }; |
| |
| return x86_match_cpu(byt); |
| } |
| |
| #define BYT_IOSF_SCCEP 0x63 |
| #define BYT_IOSF_OCP_NETCTRL0 0x1078 |
| #define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8) |
| |
| static void sdhci_acpi_byt_setting(struct device *dev) |
| { |
| u32 val = 0; |
| |
| if (!sdhci_acpi_byt()) |
| return; |
| |
| if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0, |
| &val)) { |
| dev_err(dev, "%s read error\n", __func__); |
| return; |
| } |
| |
| if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE)) |
| return; |
| |
| val &= ~BYT_IOSF_OCP_TIMEOUT_BASE; |
| |
| if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0, |
| val)) { |
| dev_err(dev, "%s write error\n", __func__); |
| return; |
| } |
| |
| dev_dbg(dev, "%s completed\n", __func__); |
| } |
| |
| static bool sdhci_acpi_byt_defer(struct device *dev) |
| { |
| if (!sdhci_acpi_byt()) |
| return false; |
| |
| if (!iosf_mbi_available()) |
| return true; |
| |
| sdhci_acpi_byt_setting(dev); |
| |
| return false; |
| } |
| |
| #else |
| |
| static inline void sdhci_acpi_byt_setting(struct device *dev) |
| { |
| } |
| |
| static inline bool sdhci_acpi_byt_defer(struct device *dev) |
| { |
| return false; |
| } |
| |
| #endif |
| |
| static int bxt_get_cd(struct mmc_host *mmc) |
| { |
| int gpio_cd = mmc_gpio_get_cd(mmc); |
| struct sdhci_host *host = mmc_priv(mmc); |
| unsigned long flags; |
| int ret = 0; |
| |
| if (!gpio_cd) |
| return 0; |
| |
| spin_lock_irqsave(&host->lock, flags); |
| |
| if (host->flags & SDHCI_DEVICE_DEAD) |
| goto out; |
| |
| ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT); |
| out: |
| spin_unlock_irqrestore(&host->lock, flags); |
| |
| return ret; |
| } |
| |
| 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 */ |
| |
| if (hid && !strcmp(hid, "80865ACA")) |
| host->mmc_host_ops.get_cd = bxt_get_cd; |
| |
| 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, |
| }; |
| |
| static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = { |
| .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, |
| .quirks2 = SDHCI_QUIRK2_NO_1_8_V, |
| .caps = MMC_CAP_NONREMOVABLE, |
| }; |
| |
| static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = { |
| .quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION, |
| .caps = MMC_CAP_NONREMOVABLE, |
| }; |
| |
| 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" }, |
| { "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v }, |
| { "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd }, |
| { }, |
| }; |
| |
| static const struct acpi_device_id sdhci_acpi_ids[] = { |
| { "80865ACA" }, |
| { "80865ACC" }, |
| { "80865AD0" }, |
| { "80860F14" }, |
| { "80860F16" }, |
| { "INT33BB" }, |
| { "INT33C6" }, |
| { "INT3436" }, |
| { "INT344D" }, |
| { "PNP0D40" }, |
| { "QCOM8051" }, |
| { "QCOM8052" }, |
| { }, |
| }; |
| 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; |
| |
| if (sdhci_acpi_byt_defer(dev)) |
| return -EPROBE_DEFER; |
| |
| 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); |
| } |
| |
| device_enable_async_suspend(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); |
| |
| sdhci_acpi_byt_setting(&c->pdev->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); |
| |
| sdhci_acpi_byt_setting(&c->pdev->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"); |