forked from Minki/linux
94203042cd
Just fix the comments, no functional changes. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
475 lines
12 KiB
C
475 lines
12 KiB
C
/*
|
|
* 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 <linux/mmc/sdhci.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,
|
|
.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[] = {
|
|
{ "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 },
|
|
{ "PNP0D40" },
|
|
{ },
|
|
};
|
|
|
|
static const struct acpi_device_id sdhci_acpi_ids[] = {
|
|
{ "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");
|