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