sandbox: Convert SPI flash emulation to use sf_params

At present sandbox has its own table of supported SPI flash chips. Now that
the SPI flash system is fully consolidated and has its own list, sandbox
should use that.

This enables us to expand the number of chips that sandbox supports.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>

drivers/mtd/spi/sandbox.c

@@ -51,46 +51,7 @@ static const char *sandbox_sf_state_name(enum sandbox_sf_state state)
 /* Assume all SPI flashes have 3 byte addresses since they do atm */
 #define SF_ADDR_LEN	3
 
-struct sandbox_spi_flash_erase_commands {
-	u8 cmd;
-	u32 size;
-};
-#define IDCODE_LEN 5
-#define MAX_ERASE_CMDS 3
-struct sandbox_spi_flash_data {
-	const char *name;
-	u8 idcode[IDCODE_LEN];
-	u32 size;
-	const struct sandbox_spi_flash_erase_commands
-						erase_cmds[MAX_ERASE_CMDS];
-};
-
-/* Structure describing all the flashes we know how to emulate */
-static const struct sandbox_spi_flash_data sandbox_sf_flashes[] = {
-	{
-		"M25P16", { 0x20, 0x20, 0x15 }, (2 << 20),
-		{	/* erase commands */
-			{ 0xd8, (64 << 10), }, /* sector */
-			{ 0xc7, (2 << 20), }, /* bulk */
-		},
-	},
-	{
-		"W25Q32", { 0xef, 0x40, 0x16 }, (4 << 20),
-		{	/* erase commands */
-			{ 0x20, (4 << 10), }, /* 4KB */
-			{ 0xd8, (64 << 10), }, /* sector */
-			{ 0xc7, (4 << 20), }, /* bulk */
-		},
-	},
-	{
-		"W25Q128", { 0xef, 0x40, 0x18 }, (16 << 20),
-		{	/* erase commands */
-			{ 0x20, (4 << 10), }, /* 4KB */
-			{ 0xd8, (64 << 10), }, /* sector */
-			{ 0xc7, (16 << 20), }, /* bulk */
-		},
-	},
-};
+#define IDCODE_LEN 3
 
 /* Used to quickly bulk erase backing store */
 static u8 sandbox_sf_0xff[0x1000];
@@ -109,7 +70,8 @@ struct sandbox_spi_flash {
 	 */
 	enum sandbox_sf_state state;
 	uint cmd;
-	const void *cmd_data;
+	/* Erase size of current erase command */
+	uint erase_size;
 	/* Current position in the flash; used when reading/writing/etc... */
 	uint off;
 	/* How many address bytes we've consumed */
@@ -117,7 +79,7 @@ struct sandbox_spi_flash {
 	/* The current flash status (see STAT_XXX defines above) */
 	u16 status;
 	/* Data describing the flash we're emulating */
-	const struct sandbox_spi_flash_data *data;
+	const struct spi_flash_params *data;
 	/* The file on disk to serv up data from */
 	int fd;
 };
@@ -127,8 +89,8 @@ static int sandbox_sf_setup(void **priv, const char *spec)
 	/* spec = idcode:file */
 	struct sandbox_spi_flash *sbsf;
 	const char *file;
-	size_t i, len, idname_len;
-	const struct sandbox_spi_flash_data *data;
+	size_t len, idname_len;
+	const struct spi_flash_params *data;
 
 	file = strchr(spec, ':');
 	if (!file) {
@@ -138,15 +100,14 @@ static int sandbox_sf_setup(void **priv, const char *spec)
 	idname_len = file - spec;
 	++file;
 
-	for (i = 0; i < ARRAY_SIZE(sandbox_sf_flashes); ++i) {
-		data = &sandbox_sf_flashes[i];
+	for (data = spi_flash_params_table; data->name; data++) {
 		len = strlen(data->name);
 		if (idname_len != len)
 			continue;
 		if (!memcmp(spec, data->name, len))
 			break;
 	}
-	if (i == ARRAY_SIZE(sandbox_sf_flashes)) {
+	if (!data->name) {
 		printf("sandbox_sf: unknown flash '%*s'\n", (int)idname_len,
 		       spec);
 		goto error;
@@ -223,7 +184,6 @@ static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
 		sbsf->pad_addr_bytes = 1;
 	case CMD_READ_ARRAY_SLOW:
 	case CMD_PAGE_PROGRAM:
- state_addr:
 		sbsf->state = SF_ADDR;
 		break;
 	case CMD_WRITE_DISABLE:
@@ -241,24 +201,25 @@ static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
 		sbsf->status |= STAT_WEL;
 		break;
 	default: {
-		size_t i;
-
-		/* handle erase commands first */
-		for (i = 0; i < MAX_ERASE_CMDS; ++i) {
-			const struct sandbox_spi_flash_erase_commands *
-				erase_cmd = &sbsf->data->erase_cmds[i];
-
-			if (erase_cmd->cmd == 0x00)
-				continue;
-			if (sbsf->cmd != erase_cmd->cmd)
-				continue;
-
-			sbsf->cmd_data = erase_cmd;
-			goto state_addr;
+		int flags = sbsf->data->flags;
+
+		/* we only support erase here */
+		if (sbsf->cmd == CMD_ERASE_CHIP) {
+			sbsf->erase_size = sbsf->data->sector_size *
+				sbsf->data->nr_sectors;
+		} else if (sbsf->cmd == CMD_ERASE_4K && (flags & SECT_4K)) {
+			sbsf->erase_size = 4 << 10;
+		} else if (sbsf->cmd == CMD_ERASE_32K && (flags & SECT_32K)) {
+			sbsf->erase_size = 32 << 10;
+		} else if (sbsf->cmd == CMD_ERASE_64K &&
+			   !(flags & (SECT_4K | SECT_32K))) {
+			sbsf->erase_size = 64 << 10;
+		} else {
+			debug(" cmd unknown: %#x\n", sbsf->cmd);
+			return 1;
 		}
-
-		debug(" cmd unknown: %#x\n", sbsf->cmd);
-		return 1;
+		sbsf->state = SF_ADDR;
+		break;
 	}
 	}
 
@@ -309,11 +270,14 @@ static int sandbox_sf_xfer(void *priv, const u8 *rx, u8 *tx,
 			u8 id;
 
 			debug(" id: off:%u tx:", sbsf->off);
-			if (sbsf->off < IDCODE_LEN)
-				id = sbsf->data->idcode[sbsf->off];
-			else
+			if (sbsf->off < IDCODE_LEN) {
+				/* Extract correct byte from ID 0x00aabbcc */
+				id = sbsf->data->jedec >>
+					(8 * (IDCODE_LEN - 1 - sbsf->off));
+			} else {
 				id = 0;
-			debug("%02x\n", id);
+			}
+			debug("%d %02x\n", sbsf->off, id);
 			tx[pos++] = id;
 			++sbsf->off;
 			break;
@@ -406,24 +370,22 @@ static int sandbox_sf_xfer(void *priv, const u8 *rx, u8 *tx,
 			break;
 		case SF_ERASE:
  case_sf_erase: {
-			const struct sandbox_spi_flash_erase_commands *
-						erase_cmd = sbsf->cmd_data;
-
 			if (!(sbsf->status & STAT_WEL)) {
 				puts("sandbox_sf: write enable not set before erase\n");
 				goto done;
 			}
 
 			/* verify address is aligned */
-			if (sbsf->off & (erase_cmd->size - 1)) {
+			if (sbsf->off & (sbsf->erase_size - 1)) {
 				debug(" sector erase: cmd:%#x needs align:%#x, but we got %#x\n",
-				      erase_cmd->cmd, erase_cmd->size,
+				      sbsf->cmd, sbsf->erase_size,
 				      sbsf->off);
 				sbsf->status &= ~STAT_WEL;
 				goto done;
 			}
 
-			debug(" sector erase addr: %u\n", sbsf->off);
+			debug(" sector erase addr: %u, size: %u\n", sbsf->off,
+			      sbsf->erase_size);
 
 			cnt = bytes - pos;
 			sandbox_spi_tristate(&tx[pos], cnt);
@@ -433,7 +395,7 @@ static int sandbox_sf_xfer(void *priv, const u8 *rx, u8 *tx,
 			 * TODO(vapier@gentoo.org): latch WIP in status, and
 			 * delay before clearing it ?
 			 */
-			ret = sandbox_erase_part(sbsf, erase_cmd->size);
+			ret = sandbox_erase_part(sbsf, sbsf->erase_size);
 			sbsf->status &= ~STAT_WEL;
 			if (ret) {
 				debug("sandbox_sf: Erase failed\n");