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SDMMC: use slot-gpio to handle cd pin

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This commit is contained in:
xbw
2014-03-04 21:47:48 +08:00
parent d4fe5b33c5
commit 83a2aa8b76
1 changed files with 41 additions and 12 deletions
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53
drivers/mmc/host/rk_sdmmc.c
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@@ -31,12 +31,14 @@
#include <linux/irq.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sdio.h>
#include <linux/mmc/rk_mmc.h>
#include <linux/bitops.h>
#include <linux/regulator/consumer.h>
#include <linux/workqueue.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/mmc/slot-gpio.h>
#include "rk_sdmmc.h"
@@ -981,20 +983,29 @@ static int dw_mci_get_cd(struct mmc_host *mmc)
int present;
struct dw_mci_slot *slot = mmc_priv(mmc);
struct dw_mci_board *brd = slot->host->pdata;
struct dw_mci *host = slot->host;
int gpio_cd = mmc_gpio_get_cd(mmc);
/* Use platform get_cd function, else try onboard card detect */
if (brd->quirks & DW_MCI_QUIRK_BROKEN_CARD_DETECTION)
present = 1;
else if (brd->get_cd)
present = !brd->get_cd(slot->id);
else if (!IS_ERR_VALUE(gpio_cd))
present = gpio_cd;
else
present = (mci_readl(slot->host, CDETECT) & (1 << slot->id))
== 0 ? 1 : 0;
if (present)
spin_lock_bh(&host->lock);
if (present) {
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
dev_dbg(&mmc->class_dev, "card is present\n");
else
} else {
clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
dev_dbg(&mmc->class_dev, "card is not present\n");
}
spin_unlock_bh(&host->lock);
return present;
}
@@ -1851,10 +1862,6 @@ static void dw_mci_work_routine_card(struct work_struct *work)
/* Card change detected */
slot->last_detect_state = present;
/* Mark card as present if applicable */
if (present != 0)
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
/* Clean up queue if present */
mrq = slot->mrq;
if (mrq) {
@@ -1903,7 +1910,6 @@ static void dw_mci_work_routine_card(struct work_struct *work)
/* Power down slot */
if (present == 0) {
clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
/*
* Clear down the FIFO - doing so generates a
@@ -2042,6 +2048,26 @@ static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot)
return gpio;
}
/* find the cd gpio for a given slot */
static void dw_mci_of_get_cd_gpio(struct device *dev, u8 slot,
struct mmc_host *mmc)
{
struct device_node *np = dw_mci_of_find_slot_node(dev, slot);
int gpio;
if (!np)
return;
gpio = of_get_named_gpio(np, "cd-gpios", 0);
/* Having a missing entry is valid; return silently */
if (!gpio_is_valid(gpio))
return;
if (mmc_gpio_request_cd(mmc, gpio))
dev_warn(dev, "gpio [%d] request failed\n", gpio);
}
#else /* CONFIG_OF */
static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot)
{
@@ -2059,6 +2085,11 @@ static int dw_mci_of_get_wp_gpio(struct device *dev, u8 slot)
{
return -EINVAL;
}
static void dw_mci_of_get_cd_gpio(struct device *dev, u8 slot,
struct mmc_host *mmc)
{
return;
}
#endif /* CONFIG_OF */
static int dw_mci_init_slot(struct dw_mci *host, unsigned int id)
@@ -2180,12 +2211,8 @@ if (gpio_is_valid(slot->pwr_en_gpio))
}
}
}
if (dw_mci_get_cd(mmc))
set_bit(DW_MMC_CARD_PRESENT, &slot->flags);
else
clear_bit(DW_MMC_CARD_PRESENT, &slot->flags);
slot->wp_gpio = dw_mci_of_get_wp_gpio(host->dev, slot->id);
dw_mci_of_get_cd_gpio(host->dev, slot->id, mmc);
ret = mmc_add_host(mmc);
if (ret)
@@ -2348,6 +2375,8 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host)
if (of_find_property(np, "caps2-mmc-hs200-1_2v", NULL))
pdata->caps2 |= MMC_CAP2_HS200_1_2V_SDR;
if (of_get_property(np, "cd-inverted", NULL))
pdata->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
return pdata;
}