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authorSascha Hauer <s.hauer@pengutronix.de>2008-12-19 14:32:07 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2009-03-13 10:34:39 +0100
commit7c107dcb652c2101426adfc3193140db95b44594 (patch)
tree50aa0256a8fd8fe730855a276fb396d32ed1bc95 /arch/arm
parentf2cb641f565dccebfa934b1a940bc6517734d391 (diff)
pcm970 baseboard: Add SDHC support
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-mx2/pcm970-baseboard.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/arm/mach-mx2/pcm970-baseboard.c b/arch/arm/mach-mx2/pcm970-baseboard.c
index 232e0416f15..bf4e520bc1b 100644
--- a/arch/arm/mach-mx2/pcm970-baseboard.c
+++ b/arch/arm/mach-mx2/pcm970-baseboard.c
@@ -17,16 +17,78 @@
*/
#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/irq.h>
#include <asm/mach/arch.h>
#include <mach/hardware.h>
#include <mach/common.h>
+#include <mach/mmc.h>
#include <mach/imxfb.h>
#include <mach/iomux.h>
#include "devices.h"
+static int pcm970_sdhc2_get_ro(struct device *dev)
+{
+ return gpio_get_value(GPIO_PORTC + 28);
+}
+
+static int pcm970_sdhc2_pins[] = {
+ PB4_PF_SD2_D0,
+ PB5_PF_SD2_D1,
+ PB6_PF_SD2_D2,
+ PB7_PF_SD2_D3,
+ PB8_PF_SD2_CMD,
+ PB9_PF_SD2_CLK,
+};
+
+static int pcm970_sdhc2_init(struct device *dev, irq_handler_t detect_irq, void *data)
+{
+ int ret;
+
+ ret = mxc_gpio_setup_multiple_pins(pcm970_sdhc2_pins,
+ ARRAY_SIZE(pcm970_sdhc2_pins), "sdhc2");
+ if(ret)
+ return ret;
+
+ ret = request_irq(IRQ_GPIOC(29), detect_irq, 0,
+ "imx-mmc-detect", data);
+ if (ret)
+ goto out_release_gpio;
+
+ set_irq_type(IRQ_GPIOC(29), IRQF_TRIGGER_FALLING);
+
+ ret = gpio_request(GPIO_PORTC + 28, "imx-mmc-ro");
+ if (ret)
+ goto out_release_gpio;
+
+ mxc_gpio_mode((GPIO_PORTC | 28) | GPIO_GPIO | GPIO_IN);
+ gpio_direction_input(GPIO_PORTC + 28);
+
+ return 0;
+
+out_release_gpio:
+ mxc_gpio_release_multiple_pins(pcm970_sdhc2_pins,
+ ARRAY_SIZE(pcm970_sdhc2_pins));
+ return ret;
+}
+
+static void pcm970_sdhc2_exit(struct device *dev, void *data)
+{
+ free_irq(IRQ_GPIOC(29), data);
+ gpio_free(GPIO_PORTC + 28);
+ mxc_gpio_release_multiple_pins(pcm970_sdhc2_pins,
+ ARRAY_SIZE(pcm970_sdhc2_pins));
+}
+
+static struct imxmmc_platform_data sdhc_pdata = {
+ .get_ro = pcm970_sdhc2_get_ro,
+ .init = pcm970_sdhc2_init,
+ .exit = pcm970_sdhc2_exit,
+};
+
static int mxc_fb_pins[] = {
PA5_PF_LSCLK, PA6_PF_LD0, PA7_PF_LD1, PA8_PF_LD2,
PA9_PF_LD3, PA10_PF_LD4, PA11_PF_LD5, PA12_PF_LD6,
@@ -96,4 +158,5 @@ static struct imx_fb_platform_data pcm038_fb_data = {
void __init pcm970_baseboard_init(void)
{
mxc_register_device(&mxc_fb_device, &pcm038_fb_data);
+ mxc_register_device(&mxc_sdhc_device1, &sdhc_pdata);
}