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authorAlberto Panizzo <alberto@amarulasolutions.com>2011-03-07 11:45:07 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2011-03-08 13:24:20 +0100
commit0ce88b34ea5a1b48438848739a72da6b4fe7a5fa (patch)
treef2ac787deedd2c2c2aaa929a12807c8399f9bcb7 /arch/arm/mach-mx3
parentbeb859645a8a9dfa089bef05206c844d9d34f307 (diff)
downloadop-kernel-dev-0ce88b34ea5a1b48438848739a72da6b4fe7a5fa.zip
op-kernel-dev-0ce88b34ea5a1b48438848739a72da6b4fe7a5fa.tar.gz
mach-mx31_3ds: Add support for the MMC slot of the personality board
Signed-off-by: Alberto Panizzo <alberto@amarulasolutions.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-mx3')
-rw-r--r--arch/arm/mach-mx3/mach-mx31_3ds.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/mach-mx31_3ds.c b/arch/arm/mach-mx3/mach-mx31_3ds.c
index f1dbb9d..cff9206 100644
--- a/arch/arm/mach-mx3/mach-mx31_3ds.c
+++ b/arch/arm/mach-mx3/mach-mx31_3ds.c
@@ -35,6 +35,7 @@
#include <mach/iomux-mx3.h>
#include <mach/3ds_debugboard.h>
#include <mach/ulpi.h>
+#include <mach/mmc.h>
#include "devices-imx31.h"
#include "devices.h"
@@ -99,6 +100,85 @@ static int mx31_3ds_pins[] = {
/* I2C1 */
MX31_PIN_I2C_CLK__I2C1_SCL,
MX31_PIN_I2C_DAT__I2C1_SDA,
+ /* SDHC1 */
+ MX31_PIN_SD1_DATA3__SD1_DATA3,
+ MX31_PIN_SD1_DATA2__SD1_DATA2,
+ MX31_PIN_SD1_DATA1__SD1_DATA1,
+ MX31_PIN_SD1_DATA0__SD1_DATA0,
+ MX31_PIN_SD1_CLK__SD1_CLK,
+ MX31_PIN_SD1_CMD__SD1_CMD,
+ MX31_PIN_GPIO3_1__GPIO3_1, /* Card detect */
+ MX31_PIN_GPIO3_0__GPIO3_0, /* OE */
+};
+
+/*
+ * Support for SD card slot in personality board
+ */
+#define MX31_3DS_GPIO_SDHC1_CD IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
+#define MX31_3DS_GPIO_SDHC1_BE IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
+
+static struct gpio mx31_3ds_sdhc1_gpios[] = {
+ { MX31_3DS_GPIO_SDHC1_CD, GPIOF_IN, "sdhc1-card-detect" },
+ { MX31_3DS_GPIO_SDHC1_BE, GPIOF_OUT_INIT_LOW, "sdhc1-bus-en" },
+};
+
+static int mx31_3ds_sdhc1_init(struct device *dev,
+ irq_handler_t detect_irq,
+ void *data)
+{
+ int ret;
+
+ ret = gpio_request_array(mx31_3ds_sdhc1_gpios,
+ ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
+ if (ret) {
+ pr_warning("Unable to request the SD/MMC GPIOs.\n");
+ return ret;
+ }
+
+ ret = request_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO3_1),
+ detect_irq, IRQF_DISABLED |
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ "sdhc1-detect", data);
+ if (ret) {
+ pr_warning("Unable to request the SD/MMC card-detect IRQ.\n");
+ goto gpio_free;
+ }
+
+ return 0;
+
+gpio_free:
+ gpio_free_array(mx31_3ds_sdhc1_gpios,
+ ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
+ return ret;
+}
+
+static void mx31_3ds_sdhc1_exit(struct device *dev, void *data)
+{
+ free_irq(IOMUX_TO_IRQ(MX31_PIN_GPIO3_1), data);
+ gpio_free_array(mx31_3ds_sdhc1_gpios,
+ ARRAY_SIZE(mx31_3ds_sdhc1_gpios));
+}
+
+static void mx31_3ds_sdhc1_setpower(struct device *dev, unsigned int vdd)
+{
+ /*
+ * While the voltage stuff is done by the driver, activate the
+ * Buffer Enable Pin only if there is a card in slot to fix the card
+ * voltage issue caused by bi-directional chip TXB0108 on 3Stack.
+ * Done here because at this stage we have for sure a debounced value
+ * of the presence of the card, showed by the value of vdd.
+ * 7 == ilog2(MMC_VDD_165_195)
+ */
+ if (vdd > 7)
+ gpio_set_value(MX31_3DS_GPIO_SDHC1_BE, 1);
+ else
+ gpio_set_value(MX31_3DS_GPIO_SDHC1_BE, 0);
+}
+
+static struct imxmmc_platform_data sdhc1_pdata = {
+ .init = mx31_3ds_sdhc1_init,
+ .exit = mx31_3ds_sdhc1_exit,
+ .setpower = mx31_3ds_sdhc1_setpower,
};
/*
@@ -137,6 +217,21 @@ static struct regulator_init_data gpo_init = {
}
};
+static struct regulator_consumer_supply vmmc2_consumers[] = {
+ REGULATOR_SUPPLY("vmmc", "mxc-mmc.0"),
+};
+
+static struct regulator_init_data vmmc2_init = {
+ .constraints = {
+ .min_uV = 3000000,
+ .max_uV = 3000000,
+ .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
+ REGULATOR_CHANGE_STATUS,
+ },
+ .num_consumer_supplies = ARRAY_SIZE(vmmc2_consumers),
+ .consumer_supplies = vmmc2_consumers,
+};
+
static struct mc13xxx_regulator_init_data mx31_3ds_regulators[] = {
{
.id = MC13783_REG_PWGT1SPI, /* Power Gate for ARM core. */
@@ -151,6 +246,9 @@ static struct mc13xxx_regulator_init_data mx31_3ds_regulators[] = {
}, {
.id = MC13783_REG_GPO3, /* Turn on 3.3V */
.init_data = &gpo_init,
+ }, {
+ .id = MC13783_REG_VMMC2, /* Power MMC/SD, WiFi/Bluetooth. */
+ .init_data = &vmmc2_init,
},
};
@@ -362,6 +460,7 @@ static void __init mx31_3ds_init(void)
"devices on the debug board are unusable.\n");
imx31_add_imx2_wdt(NULL);
imx31_add_imx_i2c0(&mx31_3ds_i2c0_data);
+ imx31_add_mxc_mmc(0, &sdhc1_pdata);
}
static void __init mx31_3ds_timer_init(void)
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