From ec5b3cef666f93d302ff2d48cd5ef430a6858e43 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Thu, 12 Nov 2009 17:44:52 +0000
Subject: [PATCH] Add SDIO GPIO initialization

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2250 42af7a65-404d-4744-a932-0658087f49c3
---
 arch/arm/src/stm32/stm32_internal.h | 13 +++++++++++++
 arch/arm/src/stm32/stm32_sdio.c     | 25 +++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/arch/arm/src/stm32/stm32_internal.h b/arch/arm/src/stm32/stm32_internal.h
index 2a464c0bfd..0357aa562c 100755
--- a/arch/arm/src/stm32/stm32_internal.h
+++ b/arch/arm/src/stm32/stm32_internal.h
@@ -456,6 +456,19 @@
 #define GPIO_CFIDE_NCE41  (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTG|GPIO_PIN10)
 #define GPIO_CFIDE_NCE42  (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTG|GPIO_PIN11)
 
+/* SDIO */
+
+#define GPIO_SDIO_D0      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN8)
+#define GPIO_SDIO_D1      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN9)
+#define GPIO_SDIO_D2      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN10)
+#define GPIO_SDIO_D3      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN11)
+#define GPIO_SDIO_D4      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTB|GPIO_PIN8)
+#define GPIO_SDIO_D5      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTB|GPIO_PIN9)
+#define GPIO_SDIO_D6      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN6)
+#define GPIO_SDIO_D7      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN7)
+#define GPIO_SDIO_CK      (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTC|GPIO_PIN12)
+#define GPIO_SDIO_CMD     (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTD|GPIO_PIN2)
+
 /* FSMC: NOR/PSRAM/SRAM (NPS) */
 
 #define GPIO_NPS_A0       (GPIO_ALT|GPIO_CNF_AFPP|GPIO_MODE_50MHz|GPIO_PORTF|GPIO_PIN0)
diff --git a/arch/arm/src/stm32/stm32_sdio.c b/arch/arm/src/stm32/stm32_sdio.c
index 7695b4cdb4..26aeb0e482 100644
--- a/arch/arm/src/stm32/stm32_sdio.c
+++ b/arch/arm/src/stm32/stm32_sdio.c
@@ -51,10 +51,19 @@
 #include "stm32_internal.h"
 #include "stm32_sdio.h"
 
+#if CONFIG_STM32_SDIO
+
 /****************************************************************************
  * Pre-Processor Definitions
  ****************************************************************************/
 
+/* Configuration ************************************************************/
+
+#if defined(CONFIG_SDIO_DMA) && !defined(CONFIG_STM32_DMA2)
+#  warning "CONFIG_SDIO_DMA support requires CONFIG_STM32_DMA2"
+#  undef CONFIG_SDIO_DMA
+#endif
+
 /* Friendly CLKCR bit re-definitions ****************************************/
 
 #define SDIO_CLKCR_RISINGEDGE    (0)
@@ -1049,6 +1058,22 @@ static void stm32_default(void)
 
 int mmcsd_slotinitialize(int minor, int slotno, FAR struct sdio_dev_s *dev)
 {
+  /* Configure GPIOs for 4-bit, wide-bus operation (the chip is capable of
+   * 8-bit wide bus operation but D4-D7 are not configured).
+   */
+
+  stm32_configgpio(GPIO_SDIO_D0);
+  stm32_configgpio(GPIO_SDIO_D1);
+  stm32_configgpio(GPIO_SDIO_D2);
+  stm32_configgpio(GPIO_SDIO_D3);
+  stm32_configgpio(GPIO_SDIO_CK);
+  stm32_configgpio(GPIO_SDIO_CMD);
+
+  /* Put SDIO registers in their default, reset state */
+
+  stm32_default();
+
   return -ENOSYS;
 }
 
+#endif /* CONFIG_STM32_SDIO */
\ No newline at end of file