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Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/mmci.c109
-rw-r--r--drivers/mmc/host/mmci.h3
-rw-r--r--drivers/mmc/host/pxamci.c104
3 files changed, 181 insertions, 35 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 8741d0f5146..3d1e5329da1 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -22,12 +22,13 @@
#include <linux/clk.h>
#include <linux/scatterlist.h>
#include <linux/gpio.h>
+#include <linux/amba/mmci.h>
+#include <linux/regulator/consumer.h>
#include <asm/cacheflush.h>
#include <asm/div64.h>
#include <asm/io.h>
#include <asm/sizes.h>
-#include <asm/mach/mmc.h>
#include "mmci.h"
@@ -38,6 +39,36 @@
static unsigned int fmax = 515633;
+/*
+ * This must be called with host->lock held
+ */
+static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
+{
+ u32 clk = 0;
+
+ if (desired) {
+ if (desired >= host->mclk) {
+ clk = MCI_CLK_BYPASS;
+ host->cclk = host->mclk;
+ } else {
+ clk = host->mclk / (2 * desired) - 1;
+ if (clk >= 256)
+ clk = 255;
+ host->cclk = host->mclk / (2 * (clk + 1));
+ }
+ if (host->hw_designer == 0x80)
+ clk |= MCI_FCEN; /* Bug fix in ST IP block */
+ clk |= MCI_CLK_ENABLE;
+ /* This hasn't proven to be worthwhile */
+ /* clk |= MCI_CLK_PWRSAVE; */
+ }
+
+ if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
+ clk |= MCI_WIDE_BUS;
+
+ writel(clk, host->base + MMCICLOCK);
+}
+
static void
mmci_request_end(struct mmci_host *host, struct mmc_request *mrq)
{
@@ -419,30 +450,31 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct mmci_host *host = mmc_priv(mmc);
- u32 clk = 0, pwr = 0;
-
- if (ios->clock) {
- if (ios->clock >= host->mclk) {
- clk = MCI_CLK_BYPASS;
- host->cclk = host->mclk;
- } else {
- clk = host->mclk / (2 * ios->clock) - 1;
- if (clk >= 256)
- clk = 255;
- host->cclk = host->mclk / (2 * (clk + 1));
- }
- if (host->hw_designer == AMBA_VENDOR_ST)
- clk |= MCI_FCEN; /* Bug fix in ST IP block */
- clk |= MCI_CLK_ENABLE;
- }
-
- if (host->plat->translate_vdd)
- pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
+ u32 pwr = 0;
+ unsigned long flags;
switch (ios->power_mode) {
case MMC_POWER_OFF:
+ if(host->vcc &&
+ regulator_is_enabled(host->vcc))
+ regulator_disable(host->vcc);
break;
case MMC_POWER_UP:
+#ifdef CONFIG_REGULATOR
+ if (host->vcc)
+ /* This implicitly enables the regulator */
+ mmc_regulator_set_ocr(host->vcc, ios->vdd);
+#endif
+ /*
+ * The translate_vdd function is not used if you have
+ * an external regulator, or your design is really weird.
+ * Using it would mean sending in power control BOTH using
+ * a regulator AND the 4 MMCIPWR bits. If we don't have
+ * a regulator, we might have some other platform specific
+ * power control behind this translate function.
+ */
+ if (!host->vcc && host->plat->translate_vdd)
+ pwr |= host->plat->translate_vdd(mmc_dev(mmc), ios->vdd);
/* The ST version does not have this, fall through to POWER_ON */
if (host->hw_designer != AMBA_VENDOR_ST) {
pwr |= MCI_PWR_UP;
@@ -465,12 +497,16 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
}
}
- writel(clk, host->base + MMCICLOCK);
+ spin_lock_irqsave(&host->lock, flags);
+
+ mmci_set_clkreg(host, ios->clock);
if (host->pwr != pwr) {
host->pwr = pwr;
writel(pwr, host->base + MMCIPOWER);
}
+
+ spin_unlock_irqrestore(&host->lock, flags);
}
static int mmci_get_ro(struct mmc_host *mmc)
@@ -517,7 +553,7 @@ static void mmci_check_status(unsigned long data)
static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
{
- struct mmc_platform_data *plat = dev->dev.platform_data;
+ struct mmci_platform_data *plat = dev->dev.platform_data;
struct mmci_host *host;
struct mmc_host *mmc;
int ret;
@@ -583,7 +619,30 @@ static int __devinit mmci_probe(struct amba_device *dev, struct amba_id *id)
mmc->ops = &mmci_ops;
mmc->f_min = (host->mclk + 511) / 512;
mmc->f_max = min(host->mclk, fmax);
- mmc->ocr_avail = plat->ocr_mask;
+#ifdef CONFIG_REGULATOR
+ /* If we're using the regulator framework, try to fetch a regulator */
+ host->vcc = regulator_get(&dev->dev, "vmmc");
+ if (IS_ERR(host->vcc))
+ host->vcc = NULL;
+ else {
+ int mask = mmc_regulator_get_ocrmask(host->vcc);
+
+ if (mask < 0)
+ dev_err(&dev->dev, "error getting OCR mask (%d)\n",
+ mask);
+ else {
+ host->mmc->ocr_avail = (u32) mask;
+ if (plat->ocr_mask)
+ dev_warn(&dev->dev,
+ "Provided ocr_mask/setpower will not be used "
+ "(using regulator instead)\n");
+ }
+ }
+#endif
+ /* Fall back to platform data if no regulator is found */
+ if (host->vcc == NULL)
+ mmc->ocr_avail = plat->ocr_mask;
+ mmc->caps = plat->capabilities;
/*
* We can do SGIO
@@ -720,6 +779,10 @@ static int __devexit mmci_remove(struct amba_device *dev)
clk_disable(host->clk);
clk_put(host->clk);
+ if (regulator_is_enabled(host->vcc))
+ regulator_disable(host->vcc);
+ regulator_put(host->vcc);
+
mmc_free_host(mmc);
amba_release_regions(dev);
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 839f264c972..1ceb9a90f59 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -161,7 +161,7 @@ struct mmci_host {
unsigned int mclk;
unsigned int cclk;
u32 pwr;
- struct mmc_platform_data *plat;
+ struct mmci_platform_data *plat;
u8 hw_designer;
u8 hw_revision:4;
@@ -175,6 +175,7 @@ struct mmci_host {
struct scatterlist *sg_ptr;
unsigned int sg_off;
unsigned int size;
+ struct regulator *vcc;
};
static inline void mmci_init_sg(struct mmci_host *host, struct mmc_data *data)
diff --git a/drivers/mmc/host/pxamci.c b/drivers/mmc/host/pxamci.c
index e55ac792d68..5e0b1529964 100644
--- a/drivers/mmc/host/pxamci.c
+++ b/drivers/mmc/host/pxamci.c
@@ -28,6 +28,7 @@
#include <linux/mmc/host.h>
#include <linux/io.h>
#include <linux/regulator/consumer.h>
+#include <linux/gpio.h>
#include <asm/sizes.h>
@@ -96,10 +97,18 @@ static inline void pxamci_init_ocr(struct pxamci_host *host)
static inline void pxamci_set_power(struct pxamci_host *host, unsigned int vdd)
{
+ int on;
+
#ifdef CONFIG_REGULATOR
if (host->vcc)
mmc_regulator_set_ocr(host->vcc, vdd);
#endif
+ if (!host->vcc && host->pdata &&
+ gpio_is_valid(host->pdata->gpio_power)) {
+ on = ((1 << vdd) & host->pdata->ocr_mask);
+ gpio_set_value(host->pdata->gpio_power,
+ !!on ^ host->pdata->gpio_power_invert);
+ }
if (!host->vcc && host->pdata && host->pdata->setpower)
host->pdata->setpower(mmc_dev(host->mmc), vdd);
}
@@ -421,6 +430,12 @@ static int pxamci_get_ro(struct mmc_host *mmc)
{
struct pxamci_host *host = mmc_priv(mmc);
+ if (host->pdata && gpio_is_valid(host->pdata->gpio_card_ro)) {
+ if (host->pdata->gpio_card_ro_invert)
+ return !gpio_get_value(host->pdata->gpio_card_ro);
+ else
+ return gpio_get_value(host->pdata->gpio_card_ro);
+ }
if (host->pdata && host->pdata->get_ro)
return !!host->pdata->get_ro(mmc_dev(mmc));
/*
@@ -534,7 +549,7 @@ static int pxamci_probe(struct platform_device *pdev)
struct mmc_host *mmc;
struct pxamci_host *host = NULL;
struct resource *r, *dmarx, *dmatx;
- int ret, irq;
+ int ret, irq, gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
@@ -661,13 +676,63 @@ static int pxamci_probe(struct platform_device *pdev)
}
host->dma_drcmrtx = dmatx->start;
+ if (host->pdata) {
+ gpio_cd = host->pdata->gpio_card_detect;
+ gpio_ro = host->pdata->gpio_card_ro;
+ gpio_power = host->pdata->gpio_power;
+ }
+ if (gpio_is_valid(gpio_power)) {
+ ret = gpio_request(gpio_power, "mmc card power");
+ if (ret) {
+ dev_err(&pdev->dev, "Failed requesting gpio_power %d\n", gpio_power);
+ goto out;
+ }
+ gpio_direction_output(gpio_power,
+ host->pdata->gpio_power_invert);
+ }
+ if (gpio_is_valid(gpio_ro)) {
+ ret = gpio_request(gpio_ro, "mmc card read only");
+ if (ret) {
+ dev_err(&pdev->dev, "Failed requesting gpio_ro %d\n", gpio_power);
+ goto err_gpio_ro;
+ }
+ gpio_direction_input(gpio_ro);
+ }
+ if (gpio_is_valid(gpio_cd)) {
+ ret = gpio_request(gpio_cd, "mmc card detect");
+ if (ret) {
+ dev_err(&pdev->dev, "Failed requesting gpio_cd %d\n", gpio_power);
+ goto err_gpio_cd;
+ }
+ gpio_direction_input(gpio_cd);
+
+ ret = request_irq(gpio_to_irq(gpio_cd), pxamci_detect_irq,
+ IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
+ "mmc card detect", mmc);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request card detect IRQ\n");
+ goto err_request_irq;
+ }
+ }
+
if (host->pdata && host->pdata->init)
host->pdata->init(&pdev->dev, pxamci_detect_irq, mmc);
+ if (gpio_is_valid(gpio_power) && host->pdata->setpower)
+ dev_warn(&pdev->dev, "gpio_power and setpower() both defined\n");
+ if (gpio_is_valid(gpio_ro) && host->pdata->get_ro)
+ dev_warn(&pdev->dev, "gpio_ro and get_ro() both defined\n");
+
mmc_add_host(mmc);
return 0;
+err_request_irq:
+ gpio_free(gpio_cd);
+err_gpio_cd:
+ gpio_free(gpio_ro);
+err_gpio_ro:
+ gpio_free(gpio_power);
out:
if (host) {
if (host->dma >= 0)
@@ -688,12 +753,26 @@ static int pxamci_probe(struct platform_device *pdev)
static int pxamci_remove(struct platform_device *pdev)
{
struct mmc_host *mmc = platform_get_drvdata(pdev);
+ int gpio_cd = -1, gpio_ro = -1, gpio_power = -1;
platform_set_drvdata(pdev, NULL);
if (mmc) {
struct pxamci_host *host = mmc_priv(mmc);
+ if (host->pdata) {
+ gpio_cd = host->pdata->gpio_card_detect;
+ gpio_ro = host->pdata->gpio_card_ro;
+ gpio_power = host->pdata->gpio_power;
+ }
+ if (gpio_is_valid(gpio_cd)) {
+ free_irq(gpio_to_irq(gpio_cd), mmc);
+ gpio_free(gpio_cd);
+ }
+ if (gpio_is_valid(gpio_ro))
+ gpio_free(gpio_ro);
+ if (gpio_is_valid(gpio_power))
+ gpio_free(gpio_power);
if (host->vcc)
regulator_put(host->vcc);
@@ -725,20 +804,20 @@ static int pxamci_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
-static int pxamci_suspend(struct platform_device *dev, pm_message_t state)
+static int pxamci_suspend(struct device *dev)
{
- struct mmc_host *mmc = platform_get_drvdata(dev);
+ struct mmc_host *mmc = dev_get_drvdata(dev);
int ret = 0;
if (mmc)
- ret = mmc_suspend_host(mmc, state);
+ ret = mmc_suspend_host(mmc, PMSG_SUSPEND);
return ret;
}
-static int pxamci_resume(struct platform_device *dev)
+static int pxamci_resume(struct device *dev)
{
- struct mmc_host *mmc = platform_get_drvdata(dev);
+ struct mmc_host *mmc = dev_get_drvdata(dev);
int ret = 0;
if (mmc)
@@ -746,19 +825,22 @@ static int pxamci_resume(struct platform_device *dev)
return ret;
}
-#else
-#define pxamci_suspend NULL
-#define pxamci_resume NULL
+
+static struct dev_pm_ops pxamci_pm_ops = {
+ .suspend = pxamci_suspend,
+ .resume = pxamci_resume,
+};
#endif
static struct platform_driver pxamci_driver = {
.probe = pxamci_probe,
.remove = pxamci_remove,
- .suspend = pxamci_suspend,
- .resume = pxamci_resume,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &pxamci_pm_ops,
+#endif
},
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-08-20 23:47:42 +0000