cmd_mtdparts: Move to common handling of FLASH devices via MTD layer

This patch removes all references to the direct CFI FLASH interface
(via flash_info[]). Now that all FLASH types currently handled in
mtdparts are available (if selected, see below) via the MTD infrastructure.
This is NOR, NAND and OneNAND right now. This can be achieved by defining
the following options:

CONFIG_MTD_DEVICE (for all FLASH types)

plus

CONFIG_FLASH_CFI_MTD (for NOR FLASH)

So we need to add those defines to the board config headers currently
using the mtdparts commands. This is done via another patch, so
we shouldn't break mtdparts compatibility.

One big advantage from this solution is that the cmd_mtdparts.c is
*much* cleaner now. Lot's of #ifdef's are removed and the code itself
is smaller. Additionally the newly added MDT concatenation feature
can new be used via the mtdparts infrastructure and therefor via
UBI etc.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Ladislav Michl <ladis@linux-mips.org>
Cc: Scott Wood <scottwood@freescale.com>

common/cmd_mtdparts.c

@@ -90,7 +90,8 @@
 #include <jffs2/load_kernel.h>
 #include <linux/list.h>
 #include <linux/ctype.h>
-#include <cramfs/cramfs_fs.h>
+#include <linux/err.h>
+#include <linux/mtd/mtd.h>
 
 #if defined(CONFIG_CMD_NAND)
 #ifdef CONFIG_NAND_LEGACY
@@ -102,7 +103,6 @@
 #endif
 
 #if defined(CONFIG_CMD_ONENAND)
-#include <linux/mtd/mtd.h>
 #include <linux/mtd/onenand.h>
 #include <onenand_uboot.h>
 #endif
@@ -303,137 +303,91 @@ static void current_save(void)
 }
 
 /**
- * Performs sanity check for supplied NOR flash partition. Table of existing
- * NOR flash devices is searched and partition device is located. Alignment
- * with the granularity of NOR flash sectors is verified.
+ * Performs sanity check for supplied flash partition.
+ * Table of existing MTD flash devices is searched and partition device
+ * is located. Alignment with the granularity of nand erasesize is verified.
  *
  * @param id of the parent device
  * @param part partition to validate
  * @return 0 if partition is valid, 1 otherwise
  */
-static int part_validate_nor(struct mtdids *id, struct part_info *part)
+static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
 {
-#if defined(CONFIG_CMD_FLASH)
-	/* info for FLASH chips */
-	extern flash_info_t flash_info[];
-	flash_info_t *flash;
-	int offset_aligned;
-	u32 end_offset, sector_size = 0;
-	int i;
-
-	flash = &flash_info[id->num];
-
-	/* size of last sector */
-	part->sector_size = flash->size -
-		(flash->start[flash->sector_count-1] - flash->start[0]);
-
-	offset_aligned = 0;
-	for (i = 0; i < flash->sector_count; i++) {
-		if ((flash->start[i] - flash->start[0]) == part->offset) {
-			offset_aligned = 1;
-			break;
-		}
-	}
-	if (offset_aligned == 0) {
-		printf("%s%d: partition (%s) start offset alignment incorrect\n",
-				MTD_DEV_TYPE(id->type), id->num, part->name);
+	struct mtd_info *mtd;
+	char mtd_dev[16];
+	int i, j;
+	ulong start;
+
+	sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(id->type), id->num);
+	mtd = get_mtd_device_nm(mtd_dev);
+	if (IS_ERR(mtd)) {
+		printf("Partition %s not found on device %s!\n", part->name, mtd_dev);
 		return 1;
 	}
 
-	end_offset = part->offset + part->size;
-	offset_aligned = 0;
-	for (i = 0; i < flash->sector_count; i++) {
-		if (i) {
-			sector_size = flash->start[i] - flash->start[i-1];
-			if (part->sector_size < sector_size)
-				part->sector_size = sector_size;
-		}
-		if ((flash->start[i] - flash->start[0]) == end_offset)
-			offset_aligned = 1;
-	}
-
-	if (offset_aligned || flash->size == end_offset)
-		return 0;
-
-	printf("%s%d: partition (%s) size alignment incorrect\n",
-			MTD_DEV_TYPE(id->type), id->num, part->name);
-#endif
-	return 1;
-}
-
-/**
- * Performs sanity check for supplied NAND flash partition. Table of existing
- * NAND flash devices is searched and partition device is located. Alignment
- * with the granularity of nand erasesize is verified.
- *
- * @param id of the parent device
- * @param part partition to validate
- * @return 0 if partition is valid, 1 otherwise
- */
-static int part_validate_nand(struct mtdids *id, struct part_info *part)
-{
-#if defined(CONFIG_CMD_NAND)
-	/* info for NAND chips */
-	nand_info_t *nand;
+	part->sector_size = mtd->erasesize;
 
-	nand = &nand_info[id->num];
+	if (!mtd->numeraseregions) {
+		/*
+		 * Only one eraseregion (NAND, OneNAND or uniform NOR),
+		 * checking for alignment is easy here
+		 */
+		if ((unsigned long)part->offset % mtd->erasesize) {
+			printf("%s%d: partition (%s) start offset"
+			       "alignment incorrect\n",
+			       MTD_DEV_TYPE(id->type), id->num, part->name);
+			return 1;
+		}
 
-	part->sector_size = nand->erasesize;
+		if (part->size % mtd->erasesize) {
+			printf("%s%d: partition (%s) size alignment incorrect\n",
+			       MTD_DEV_TYPE(id->type), id->num, part->name);
+			return 1;
+		}
+	} else {
+		/*
+		 * Multiple eraseregions (non-uniform NOR),
+		 * checking for alignment is more complex here
+		 */
+
+		/* Check start alignment */
+		for (i = 0; i < mtd->numeraseregions; i++) {
+			start = mtd->eraseregions[i].offset;
+			for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
+				if (part->offset == start)
+					goto start_ok;
+				start += mtd->eraseregions[i].erasesize;
+			}
+		}
 
-	if ((unsigned long)(part->offset) % nand->erasesize) {
 		printf("%s%d: partition (%s) start offset alignment incorrect\n",
-				MTD_DEV_TYPE(id->type), id->num, part->name);
-		return 1;
-	}
-
-	if (part->size % nand->erasesize) {
-		printf("%s%d: partition (%s) size alignment incorrect\n",
-				MTD_DEV_TYPE(id->type), id->num, part->name);
+		       MTD_DEV_TYPE(id->type), id->num, part->name);
 		return 1;
-	}
 
-	return 0;
-#else
-	return 1;
-#endif
-}
+	start_ok:
 
-/**
- * Performs sanity check for supplied OneNAND flash partition.
- * Table of existing OneNAND flash devices is searched and partition device
- * is located. Alignment with the granularity of nand erasesize is verified.
- *
- * @param id of the parent device
- * @param part partition to validate
- * @return 0 if partition is valid, 1 otherwise
- */
-static int part_validate_onenand(struct mtdids *id, struct part_info *part)
-{
-#if defined(CONFIG_CMD_ONENAND)
-	/* info for OneNAND chips */
-	struct mtd_info *mtd;
-
-	mtd = &onenand_mtd;
-
-	part->sector_size = mtd->erasesize;
-
-	if ((unsigned long)(part->offset) % mtd->erasesize) {
-		printf("%s%d: partition (%s) start offset"
-			"alignment incorrect\n",
-				MTD_DEV_TYPE(id->type), id->num, part->name);
-		return 1;
-	}
+		/* Check end/size alignment */
+		for (i = 0; i < mtd->numeraseregions; i++) {
+			start = mtd->eraseregions[i].offset;
+			for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
+				if ((part->offset + part->size) == start)
+					goto end_ok;
+				start += mtd->eraseregions[i].erasesize;
+			}
+		}
+		/* Check last sector alignment */
+		if ((part->offset + part->size) == start)
+			goto end_ok;
 
-	if (part->size % mtd->erasesize) {
 		printf("%s%d: partition (%s) size alignment incorrect\n",
-				MTD_DEV_TYPE(id->type), id->num, part->name);
+		       MTD_DEV_TYPE(id->type), id->num, part->name);
 		return 1;
+
+	end_ok:
+		return 0;
 	}
 
 	return 0;
-#else
-	return 1;
-#endif
 }
 
 
@@ -469,16 +423,11 @@ static int part_validate(struct mtdids *id, struct part_info *part)
 		return 1;
 	}
 
-	if (id->type == MTD_DEV_TYPE_NAND)
-		return part_validate_nand(id, part);
-	else if (id->type == MTD_DEV_TYPE_NOR)
-		return part_validate_nor(id, part);
-	else if (id->type == MTD_DEV_TYPE_ONENAND)
-		return part_validate_onenand(id, part);
-	else
-		DEBUGF("part_validate: invalid dev type\n");
-
-	return 1;
+	/*
+	 * Now we need to check if the partition starts and ends on
+	 * sector (eraseblock) regions
+	 */
+	return part_validate_eraseblock(id, part);
 }
 
 /**
@@ -762,48 +711,19 @@ static int part_parse(const char *const partdef, const char **ret, struct part_i
  */
 int mtd_device_validate(u8 type, u8 num, u32 *size)
 {
-	if (type == MTD_DEV_TYPE_NOR) {
-#if defined(CONFIG_CMD_FLASH)
-		if (num < CONFIG_SYS_MAX_FLASH_BANKS) {
-			extern flash_info_t flash_info[];
-			*size = flash_info[num].size;
-
-			return 0;
-		}
+	struct mtd_info *mtd;
+	char mtd_dev[16];
 
-		printf("no such FLASH device: %s%d (valid range 0 ... %d\n",
-				MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_FLASH_BANKS - 1);
-#else
-		printf("support for FLASH devices not present\n");
-#endif
-	} else if (type == MTD_DEV_TYPE_NAND) {
-#if defined(CONFIG_CMD_NAND)
-		if (num < CONFIG_SYS_MAX_NAND_DEVICE) {
-#ifndef CONFIG_NAND_LEGACY
-			*size = nand_info[num].size;
-#else
-			extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE];
-			*size = nand_dev_desc[num].totlen;
-#endif
-			return 0;
-		}
+	sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
+	mtd = get_mtd_device_nm(mtd_dev);
+	if (IS_ERR(mtd)) {
+		printf("Device %s not found!\n", mtd_dev);
+		return 1;
+	}
 
-		printf("no such NAND device: %s%d (valid range 0 ... %d)\n",
-				MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_NAND_DEVICE - 1);
-#else
-		printf("support for NAND devices not present\n");
-#endif
-	} else if (type == MTD_DEV_TYPE_ONENAND) {
-#if defined(CONFIG_CMD_ONENAND)
-		*size = onenand_mtd.size;
-		return 0;
-#else
-		printf("support for OneNAND devices not present\n");
-#endif
-	} else
-		printf("Unknown defice type %d\n", type);
+	*size = mtd->size;
 
-	return 1;
+	return 0;
 }
 
 /**