Move sd init into diskio.c, write code for latest commit

fusee/fusee-primary/src/lib/fatfs/diskio.c

@@ -7,12 +7,23 @@
 /* storage control modules to the FatFs module with a defined API.       */
 /*-----------------------------------------------------------------------*/
 
+#include <stdbool.h>
 #include <string.h>
 #include "diskio.h"		/* FatFs lower layer API */
 #include "../../sdmmc.h"
+#include "../../hwinit.h"
 
 /* Global sd struct. */
-extern struct mmc sd_mmc;
+struct mmc g_sd_mmc = {0};
+static bool g_sd_initialized = false;
+
+static bool g_ahb_redirect_enabled = false;
+
+/*
+Uncomment if needed:
+struct mmc nand_mmc = {0};
+static bool g_nand_initialized = false;
+*/
 
 /*-----------------------------------------------------------------------*/
 /* Get Drive Status                                                      */
@@ -35,7 +46,28 @@ DSTATUS disk_initialize (
 	BYTE pdrv				/* Physical drive nmuber to identify the drive */
 )
 {
-	return 0;
+	if (!g_ahb_redirect_enabled) {
+		mc_enable_ahb_redirect();
+		g_ahb_redirect_enabled = true;
+	}
+
+	switch (pdrv) {
+		case 0: {
+			if (!g_sd_initialized) {
+				int rc = sdmmc_init(&g_sd_mmc, SWITCH_MICROSD);
+				if (rc == 0) {
+					g_sd_initialized = true;
+					return 0;
+				} else {
+					return rc;
+				}
+			} else {
+				return 0;
+			}
+		}
+		default:
+			return STA_NODISK;
+	}
 }
 
 
@@ -51,12 +83,21 @@ DRESULT disk_read (
 	UINT count		/* Number of sectors to read */
 )
 {
-    for (unsigned int i = 0; i < count; i++) {
-        if (sdmmc_read(&sd_mmc, buff + 0x200 * i, sector + i, 1) != 0) {
+#if 1
+	for (unsigned int i = 0; i < count; i++) {
+        if (sdmmc_read(&g_sd_mmc, buff + 0x200 * i, sector + i, 1) != 0) {
             return RES_ERROR;
         }
     }
     return RES_OK;
+#else
+	switch (pdrv) {
+		case 0:
+			return sdmmc_read(&g_sd_mmc, buff, sector, count) == 0 ? RES_OK : RES_ERROR;
+		default:
+			return RES_PARERR;
+	}
+#endif
 }
 
 
@@ -72,7 +113,16 @@ DRESULT disk_write (
 	UINT count			/* Number of sectors to write */
 )
 {
-	return RES_ERROR;
+#if 0
+	switch (pdrv) {
+		case 0:
+			return sdmmc_write(&g_sd_mmc, buff, sector, count) == 0 ? RES_OK : RES_ERROR;
+		default:
+			return RES_PARERR;
+	}
+#else
+	return 0;
+#endif
 }
 
 
@@ -87,6 +137,6 @@ DRESULT disk_ioctl (
 	void *buff		/* Buffer to send/receive control data */
 )
 {
-	return RES_OK;
+	return 0;
 }
 

fusee/fusee-primary/src/sd_utils.c

@@ -4,24 +4,9 @@
 #include "lib/printk.h"
 #include "lib/fatfs/ff.h"
 
-/* This is used by diskio.h. */
-struct mmc sd_mmc;
 FATFS sd_fs;
-static int initialized_sd = 0;
 static int mounted_sd = 0;
 
-int initialize_sd(void) {
-    if (initialized_sd) {
-        return 1;
-    }
-    mc_enable_ahb_redirect();
-    if (sdmmc_init(&sd_mmc, SWITCH_MICROSD) == 0) {
-        printk("Initialized SD card!\n");
-        initialized_sd = 1;
-    }
-    return initialized_sd;
-}
-
 int mount_sd(void) {
     if (mounted_sd) {
         return 1;
@@ -34,9 +19,6 @@ int mount_sd(void) {
 }
 
 size_t read_sd_file(void *dst, size_t dst_size, const char *filename) {
-    if (!initialized_sd && initialize_sd() == 0) {
-        return 0;
-    }
     if (!mounted_sd && mount_sd() == 0) {
         return 0;
     }

fusee/fusee-secondary/src/sd_utils.h

@@ -4,7 +4,6 @@
 #include "utils.h"
 #include "sdmmc.h"
 
-int initialize_sd(void);
 size_t read_sd_file(void *dst, size_t dst_size, const char *filename);
 
 #endif