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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-07-09 15:16:07 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-07-09 15:16:07 +0100
commit89001446925d6da8785c3265a71316e34c6d15de (patch)
tree467acdeafd056c93456d4db33ada112ae804eabe /drivers/mmc/host/mmci.c
parent7fb2bbf4d9e7e62057184f1e061566459eef6c79 (diff)
MMC: MMCI: use gpiolib for card detect/write protect
Use gpiolib where available (and when valid GPIOs are provided) for write protect/card detect status reporting. We fall back to the old 'status' method where gpiolib support is not available. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/mmc/host/mmci.c')
-rw-r--r--drivers/mmc/host/mmci.c63
1 files changed, 61 insertions, 2 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index ac43f395eec..5eb86a8c943 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -21,6 +21,7 @@
#include <linux/amba/bus.h>
#include <linux/clk.h>
#include <linux/scatterlist.h>
+#include <linux/gpio.h>
#include <asm/cacheflush.h>
#include <asm/div64.h>
@@ -472,17 +473,41 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
}
}
+static int mmci_get_ro(struct mmc_host *mmc)
+{
+ struct mmci_host *host = mmc_priv(mmc);
+
+ if (host->gpio_wp == -ENOSYS)
+ return -ENOSYS;
+
+ return gpio_get_value(host->gpio_wp);
+}
+
+static int mmci_get_cd(struct mmc_host *mmc)
+{
+ struct mmci_host *host = mmc_priv(mmc);
+ unsigned int status;
+
+ if (host->gpio_cd == -ENOSYS)
+ status = host->plat->status(mmc_dev(host->mmc));
+ else
+ status = gpio_get_value(host->gpio_cd);
+
+ return !status;
+}
+
static const struct mmc_host_ops mmci_ops = {
.request = mmci_request,
.set_ios = mmci_set_ios,
+ .get_ro = mmci_get_ro,
+ .get_cd = mmci_get_cd,
};
static void mmci_check_status(unsigned long data)
{
struct mmci_host *host = (struct mmci_host *)data;
- unsigned int status;
+ unsigned int status = mmci_get_cd(host->mmc);
- status = host->plat->status(mmc_dev(host->mmc));
if (status ^ host->oldstat)
mmc_detect_change(host->mmc, 0);
@@ -516,6 +541,9 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
host = mmc_priv(mmc);
host->mmc = mmc;
+ host->gpio_wp = -ENOSYS;
+ host->gpio_cd = -ENOSYS;
+
host->hw_designer = amba_manf(dev);
host->hw_revision = amba_rev(dev);
DBG(host, "designer ID = 0x%02x\n", host->hw_designer);
@@ -591,6 +619,25 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
writel(0, host->base + MMCIMASK1);
writel(0xfff, host->base + MMCICLEAR);
+ if (gpio_is_valid(plat->gpio_cd)) {
+ ret = gpio_request(plat->gpio_cd, DRIVER_NAME " (cd)");
+ if (ret == 0)
+ ret = gpio_direction_input(plat->gpio_cd);
+ if (ret == 0)
+ host->gpio_cd = plat->gpio_cd;
+ else if (ret != -ENOSYS)
+ goto err_gpio_cd;
+ }
+ if (gpio_is_valid(plat->gpio_wp)) {
+ ret = gpio_request(plat->gpio_wp, DRIVER_NAME " (wp)");
+ if (ret == 0)
+ ret = gpio_direction_input(plat->gpio_wp);
+ if (ret == 0)
+ host->gpio_wp = plat->gpio_wp;
+ else if (ret != -ENOSYS)
+ goto err_gpio_wp;
+ }
+
ret = request_irq(dev->irq[0], mmci_irq, IRQF_SHARED, DRIVER_NAME " (cmd)", host);
if (ret)
goto unmap;
@@ -602,6 +649,7 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
writel(MCI_IRQENABLE, host->base + MMCIMASK0);
amba_set_drvdata(dev, mmc);
+ host->oldstat = mmci_get_cd(host->mmc);
mmc_add_host(mmc);
@@ -620,6 +668,12 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
irq0_free:
free_irq(dev->irq[0], host);
unmap:
+ if (host->gpio_wp != -ENOSYS)
+ gpio_free(host->gpio_wp);
+ err_gpio_wp:
+ if (host->gpio_cd != -ENOSYS)
+ gpio_free(host->gpio_cd);
+ err_gpio_cd:
iounmap(host->base);
clk_disable:
clk_disable(host->clk);
@@ -655,6 +709,11 @@ static int __devexit mmci_remove(struct amba_device *dev)
free_irq(dev->irq[0], host);
free_irq(dev->irq[1], host);
+ if (host->gpio_wp != -ENOSYS)
+ gpio_free(host->gpio_wp);
+ if (host->gpio_cd != -ENOSYS)
+ gpio_free(host->gpio_cd);
+
iounmap(host->base);
clk_disable(host->clk);
clk_put(host->clk);