[ARM] 3561/1: Poodle: Correct the MMC/SD power control

Patch from Richard Purdie

Correct the Poodle power control for the MMC/SD port. Also
add write protection switch support.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 20 insertions, 4 deletions

diff --git a/arch/arm/mach-pxa/poodle.c b/arch/arm/mach-pxa/poodle.c
index 1d516d317e89..234877a09dfb 100644
--- a/arch/arm/mach-pxa/poodle.c
+++ b/arch/arm/mach-pxa/poodle.c
@@ -19,6 +19,7 @@
 #include <linux/platform_device.h>
 #include <linux/fb.h>
 #include <linux/pm.h>
+#include <linux/delay.h>
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
@@ -143,7 +144,9 @@ static int poodle_mci_init(struct device *dev, irqreturn_t (*poodle_detect_int)(
         pxa_gpio_mode(GPIO6_MMCCLK_MD);
         pxa_gpio_mode(GPIO8_MMCCS0_MD);
         pxa_gpio_mode(POODLE_GPIO_nSD_DETECT | GPIO_IN);
+        pxa_gpio_mode(POODLE_GPIO_nSD_WP | GPIO_IN);
         pxa_gpio_mode(POODLE_GPIO_SD_PWR | GPIO_OUT);
+        pxa_gpio_mode(POODLE_GPIO_SD_PWR1 | GPIO_OUT);
 
         poodle_mci_platform_data.detect_delay = msecs_to_jiffies(250);
 
@@ -162,12 +165,22 @@ static void poodle_mci_setpower(struct device *dev, unsigned int vdd)
 {
         struct pxamci_platform_data* p_d = dev->platform_data;
 
-        if (( 1 << vdd) & p_d->ocr_mask)
-                GPSR1 = GPIO_bit(POODLE_GPIO_SD_PWR);
-        else
-                GPCR1 = GPIO_bit(POODLE_GPIO_SD_PWR);
+        if (( 1 << vdd) & p_d->ocr_mask) {
+                GPSR(POODLE_GPIO_SD_PWR) = GPIO_bit(POODLE_GPIO_SD_PWR);
+                mdelay(2);
+                GPSR(POODLE_GPIO_SD_PWR1) = GPIO_bit(POODLE_GPIO_SD_PWR1);
+        } else {
+                GPCR(POODLE_GPIO_SD_PWR1) = GPIO_bit(POODLE_GPIO_SD_PWR1);
+                GPCR(POODLE_GPIO_SD_PWR) = GPIO_bit(POODLE_GPIO_SD_PWR);
+        }
+}
+
+static int poodle_mci_get_ro(struct device *dev)
+{
+        return GPLR(POODLE_GPIO_nSD_WP) & GPIO_bit(POODLE_GPIO_nSD_WP);
 }
 
+
 static void poodle_mci_exit(struct device *dev, void *data)
 {
         free_irq(POODLE_IRQ_GPIO_nSD_DETECT, data);
@@ -176,6 +189,7 @@ static void poodle_mci_exit(struct device *dev, void *data)
 static struct pxamci_platform_data poodle_mci_platform_data = {
         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
         .init           = poodle_mci_init,
+        .get_ro         = poodle_mci_get_ro,
         .setpower       = poodle_mci_setpower,
         .exit           = poodle_mci_exit,
 };
diff --git a/include/asm-arm/arch-pxa/poodle.h b/include/asm-arm/arch-pxa/poodle.h
index 6b5ac5144e70..6079e0aa1ab9 100644
--- a/include/asm-arm/arch-pxa/poodle.h
+++ b/include/asm-arm/arch-pxa/poodle.h
@@ -31,6 +31,7 @@
 #define POODLE_GPIO_CF_CD               (14)
 #define POODLE_GPIO_CF_STSCHG           (14)
 #define POODLE_GPIO_SD_PWR              (33)
+#define POODLE_GPIO_SD_PWR1             (3)
 #define POODLE_GPIO_nSD_CLK             (6)
 #define POODLE_GPIO_nSD_WP              (7)
 #define POODLE_GPIO_nSD_INT             (8)
@@ -42,6 +43,7 @@
 #define POODLE_GPIO_BYPASS_ON           (36)
 #define POODLE_GPIO_CHRG_ON             (38)
 #define POODLE_GPIO_CHRG_FULL           (16)
+#define POODLE_GPIO_DISCHARGE_ON        (42) /* Enable battery discharge */
 
 /* PXA GPIOs */
 #define POODLE_IRQ_GPIO_ON_KEY          IRQ_GPIO(0)