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mmc: sdhci-pci: get gpio numbers from platform data

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Retrieve the GPIO numbers for hardware reset and
card detect from platform data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Adrian Hunter 2011-12-27 15:48:44 +02:00 committed by Chris Ball
parent 52c506f0bc
commit c5e027a4a1
1 changed files with 41 additions and 68 deletions
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109
drivers/mmc/host/sdhci-pci.c
View File

@ -23,7 +23,6 @@
#include <linux/scatterlist.h>
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/sfi.h>
#include <linux/pm_runtime.h>
#include <linux/mmc/sdhci-pci-data.h>
@ -173,32 +172,9 @@ static int mrst_hc_probe(struct sdhci_pci_chip *chip)
return 0;
}
/* Medfield eMMC hardware reset GPIOs */
static int mfd_emmc0_rst_gpio = -EINVAL;
static int mfd_emmc1_rst_gpio = -EINVAL;
static int mfd_emmc_gpio_parse(struct sfi_table_header *table)
{
struct sfi_table_simple *sb = (struct sfi_table_simple *)table;
struct sfi_gpio_table_entry *entry;
int i, num;
num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry);
entry = (struct sfi_gpio_table_entry *)sb->pentry;
for (i = 0; i < num; i++, entry++) {
if (!strncmp(entry->pin_name, "emmc0_rst", SFI_NAME_LEN))
mfd_emmc0_rst_gpio = entry->pin_no;
else if (!strncmp(entry->pin_name, "emmc1_rst", SFI_NAME_LEN))
mfd_emmc1_rst_gpio = entry->pin_no;
}
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static irqreturn_t mfd_sd_cd(int irq, void *dev_id)
static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
{
struct sdhci_pci_slot *slot = dev_id;
struct sdhci_host *host = slot->host;
@ -207,15 +183,16 @@ static irqreturn_t mfd_sd_cd(int irq, void *dev_id)
return IRQ_HANDLED;
}
#define MFLD_SD_CD_PIN 69
static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
static void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
{
int err, irq, gpio = MFLD_SD_CD_PIN;
int err, irq, gpio = slot->cd_gpio;
slot->cd_gpio = -EINVAL;
slot->cd_irq = -EINVAL;
if (!gpio_is_valid(gpio))
return;
err = gpio_request(gpio, "sd_cd");
if (err < 0)
goto out;
@ -228,7 +205,7 @@ static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
if (irq < 0)
goto out_free;
err = request_irq(irq, mfd_sd_cd, IRQF_TRIGGER_RISING |
err = request_irq(irq, sdhci_pci_sd_cd, IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING, "sd_cd", slot);
if (err)
goto out_free;
@ -237,65 +214,41 @@ static int mfd_sd_probe_slot(struct sdhci_pci_slot *slot)
slot->cd_irq = irq;
slot->host->quirks2 |= SDHCI_QUIRK2_OWN_CARD_DETECTION;
return 0;
return;
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)
static void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
{
if (slot->cd_irq >= 0)
free_irq(slot->cd_irq, slot);
gpio_free(slot->cd_gpio);
if (gpio_is_valid(slot->cd_gpio))
gpio_free(slot->cd_gpio);
}
#else
#define mfd_sd_probe_slot NULL
#define mfd_sd_remove_slot NULL
static inline void sdhci_pci_add_own_cd(struct sdhci_pci_slot *slot)
{
}
static inline void sdhci_pci_remove_own_cd(struct sdhci_pci_slot *slot)
{
}
#endif
static int mfd_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
const char *name = NULL;
int gpio = -EINVAL;
sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, mfd_emmc_gpio_parse);
switch (slot->chip->pdev->device) {
case PCI_DEVICE_ID_INTEL_MFD_EMMC0:
gpio = mfd_emmc0_rst_gpio;
name = "eMMC0_reset";
break;
case PCI_DEVICE_ID_INTEL_MFD_EMMC1:
gpio = mfd_emmc1_rst_gpio;
name = "eMMC1_reset";
break;
}
if (!gpio_request(gpio, name)) {
gpio_direction_output(gpio, 1);
slot->rst_n_gpio = gpio;
slot->host->mmc->caps |= MMC_CAP_HW_RESET;
}
slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE;
slot->host->mmc->caps2 = MMC_CAP2_BOOTPART_NOACC;
return 0;
}
static void mfd_emmc_remove_slot(struct sdhci_pci_slot *slot, int dead)
{
gpio_free(slot->rst_n_gpio);
}
static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
.probe_slot = mrst_hc_probe_slot,
@ -309,8 +262,6 @@ 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,
.allow_runtime_pm = true,
.probe_slot = mfd_sd_probe_slot,
.remove_slot = mfd_sd_remove_slot,
};
static const struct sdhci_pci_fixes sdhci_intel_mfd_sdio = {
@ -322,7 +273,6 @@ static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.allow_runtime_pm = true,
.probe_slot = mfd_emmc_probe_slot,
.remove_slot = mfd_emmc_remove_slot,
};
/* O2Micro extra registers */
@ -1229,6 +1179,7 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
slot->host = host;
slot->pci_bar = bar;
slot->rst_n_gpio = -EINVAL;
slot->cd_gpio = -EINVAL;
/* Retrieve platform data if there is any */
if (*sdhci_pci_get_data)
@ -1242,6 +1193,8 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
goto free;
}
}
slot->rst_n_gpio = slot->data->rst_n_gpio;
slot->cd_gpio = slot->data->cd_gpio;
}
host->hw_name = "PCI";
@ -1269,15 +1222,30 @@ static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
goto unmap;
}
if (gpio_is_valid(slot->rst_n_gpio)) {
if (!gpio_request(slot->rst_n_gpio, "eMMC_reset")) {
gpio_direction_output(slot->rst_n_gpio, 1);
slot->host->mmc->caps |= MMC_CAP_HW_RESET;
} else {
dev_warn(&pdev->dev, "failed to request rst_n_gpio\n");
slot->rst_n_gpio = -EINVAL;
}
}
host->mmc->pm_caps = MMC_PM_KEEP_POWER | MMC_PM_WAKE_SDIO_IRQ;
ret = sdhci_add_host(host);
if (ret)
goto remove;
sdhci_pci_add_own_cd(slot);
return slot;
remove:
if (gpio_is_valid(slot->rst_n_gpio))
gpio_free(slot->rst_n_gpio);
if (chip->fixes && chip->fixes->remove_slot)
chip->fixes->remove_slot(slot, 0);
@ -1302,6 +1270,8 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
int dead;
u32 scratch;
sdhci_pci_remove_own_cd(slot);
dead = 0;
scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
if (scratch == (u32)-1)
@ -1309,6 +1279,9 @@ static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
sdhci_remove_host(slot->host, dead);
if (gpio_is_valid(slot->rst_n_gpio))
gpio_free(slot->rst_n_gpio);
if (slot->chip->fixes && slot->chip->fixes->remove_slot)
slot->chip->fixes->remove_slot(slot, dead);