sf: unify erase commands

Analysis of the flash drivers shows that they all use 0x20 if the erase
size is 4KiB, or 0xd8 if it's larger.  So with this info in hand, we can
unify all the erase functionality in one place.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

8 files changed, 18 insertions, 71 deletions

diff --git a/drivers/mtd/spi/eon.c b/drivers/mtd/spi/eon.c
index eccdf833df..d9d43ca57e 100644
--- a/drivers/mtd/spi/eon.c
+++ b/drivers/mtd/spi/eon.c
@@ -10,10 +10,6 @@
 
 #include "spi_flash_internal.h"
 
-/* EN25Q128-specific commands */
-#define CMD_EN25Q128_SE		0x20    /* Sector Erase */
-#define CMD_EN25Q128_BE		0xd8    /* Block Erase */
-
 struct eon_spi_flash_params {
 	u8 idcode1;
 	u16 nr_sectors;
@@ -38,11 +34,6 @@ static const struct eon_spi_flash_params eon_spi_flash_table[] = {
 	},
 };
 
-static int eon_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_EN25Q128_BE, offset, len);
-}
-
 struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
 {
 	const struct eon_spi_flash_params *params;
@@ -70,7 +61,7 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
 	flash->name = params->name;
 
 	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = eon_erase;
+	flash->erase = spi_flash_cmd_erase;
 	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * 16 * 16;
diff --git a/drivers/mtd/spi/macronix.c b/drivers/mtd/spi/macronix.c
index 894b1ca2b4..5268c661ea 100644
--- a/drivers/mtd/spi/macronix.c
+++ b/drivers/mtd/spi/macronix.c
@@ -35,11 +35,6 @@
 
 #include "spi_flash_internal.h"
 
-/* MX25xx-specific commands */
-#define CMD_MX25XX_SE		0x20	/* Sector Erase */
-#define CMD_MX25XX_BE		0xD8	/* Block Erase */
-#define CMD_MX25XX_CE		0xc7	/* Chip Erase */
-
 struct macronix_spi_flash_params {
 	u16 idcode;
 	u16 nr_blocks;
@@ -123,11 +118,6 @@ static int macronix_unlock(struct spi_flash *flash)
 	return ret;
 }
 
-static int macronix_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_MX25XX_BE, offset, len);
-}
-
 struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
 {
 	const struct macronix_spi_flash_params *params;
@@ -156,7 +146,7 @@ struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
 	flash->name = params->name;
 
 	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = macronix_erase;
+	flash->erase = spi_flash_cmd_erase;
 	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * 16 * 16;
diff --git a/drivers/mtd/spi/spansion.c b/drivers/mtd/spi/spansion.c
index bedde0760d..9a114ac6a1 100644
--- a/drivers/mtd/spi/spansion.c
+++ b/drivers/mtd/spi/spansion.c
@@ -31,10 +31,6 @@
 
 #include "spi_flash_internal.h"
 
-/* S25FLxx-specific commands */
-#define CMD_S25FLXX_SE		0xd8	/* Sector Erase */
-#define CMD_S25FLXX_BE		0xc7	/* Bulk Erase */
-
 struct spansion_spi_flash_params {
 	u16 idcode1;
 	u16 idcode2;
@@ -102,11 +98,6 @@ static const struct spansion_spi_flash_params spansion_spi_flash_table[] = {
 	},
 };
 
-static int spansion_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_S25FLXX_SE, offset, len);
-}
-
 struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
 {
 	const struct spansion_spi_flash_params *params;
@@ -140,7 +131,7 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
 	flash->name = params->name;
 
 	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = spansion_erase;
+	flash->erase = spi_flash_cmd_erase;
 	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * params->pages_per_sector;
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index f689cc47cf..4ab4e13b46 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -190,8 +190,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
 		CMD_READ_STATUS, STATUS_WIP);
 }
 
-int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
-			u32 offset, size_t len)
+int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
 {
 	u32 start, end, erase_size;
 	int ret;
@@ -209,7 +208,10 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
 		return ret;
 	}
 
-	cmd[0] = erase_cmd;
+	if (erase_size == 4096)
+		cmd[0] = CMD_ERASE_4K;
+	else
+		cmd[0] = CMD_ERASE_64K;
 	start = offset;
 	end = start + len;
 
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index 0c78249791..3c6bccf0c8 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -23,6 +23,10 @@
 #define CMD_WRITE_DISABLE		0x04
 #define CMD_READ_STATUS			0x05
 #define CMD_WRITE_ENABLE		0x06
+#define CMD_ERASE_4K			0x20
+#define CMD_ERASE_32K			0x52
+#define CMD_ERASE_64K			0xd8
+#define CMD_ERASE_CHIP			0xc7
 
 /* Common status */
 #define STATUS_WIP			0x01
@@ -88,8 +92,7 @@ int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
 int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
 
 /* Erase sectors. */
-int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
-			u32 offset, size_t len);
+int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len);
 
 /* Manufacturer-specific probe functions */
 struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index e51dfc7f29..dcc0bbe4b1 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -20,7 +20,6 @@
 
 #define CMD_SST_BP		0x02	/* Byte Program */
 #define CMD_SST_AAI_WP		0xAD	/* Auto Address Increment Word Program */
-#define CMD_SST_SE		0x20	/* Sector Erase */
 
 #define SST_SR_WIP		(1 << 0)	/* Write-in-Progress */
 #define SST_SR_WEL		(1 << 1)	/* Write enable */
@@ -45,13 +44,6 @@ struct sst_spi_flash {
 	const struct sst_spi_flash_params *params;
 };
 
-static inline struct sst_spi_flash *to_sst_spi_flash(struct spi_flash *flash)
-{
-	return container_of(flash, struct sst_spi_flash, flash);
-}
-
-#define SST_SECTOR_SIZE (4 * 1024)
-#define SST_PAGE_SIZE   256
 static const struct sst_spi_flash_params sst_spi_flash_table[] = {
 	{
 		.idcode1 = 0x8d,
@@ -211,11 +203,6 @@ sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, const void *buf)
 	return ret;
 }
 
-static int sst_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_SST_SE, offset, len);
-}
-
 static int
 sst_unlock(struct spi_flash *flash)
 {
@@ -269,10 +256,10 @@ spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode)
 		stm->flash.write = sst_write_wp;
 	else
 		stm->flash.write = spi_flash_cmd_write_multi;
-	stm->flash.erase = sst_erase;
+	stm->flash.erase = spi_flash_cmd_erase;
 	stm->flash.read = spi_flash_cmd_read_fast;
-	stm->flash.page_size = SST_PAGE_SIZE;
-	stm->flash.sector_size = SST_SECTOR_SIZE;
+	stm->flash.page_size = 256;
+	stm->flash.sector_size = 4096;
 	stm->flash.size = stm->flash.sector_size * params->nr_sectors;
 
 	/* Flash powers up read-only, so clear BP# bits */
diff --git a/drivers/mtd/spi/stmicro.c b/drivers/mtd/spi/stmicro.c
index 6f7b807da2..75d6822a7d 100644
--- a/drivers/mtd/spi/stmicro.c
+++ b/drivers/mtd/spi/stmicro.c
@@ -34,8 +34,6 @@
 #include "spi_flash_internal.h"
 
 /* M25Pxx-specific commands */
-#define CMD_M25PXX_SE		0xd8	/* Sector Erase */
-#define CMD_M25PXX_BE		0xc7	/* Bulk Erase */
 #define CMD_M25PXX_RES		0xab	/* Release from DP, and Read Signature */
 
 struct stmicro_spi_flash_params {
@@ -96,11 +94,6 @@ static const struct stmicro_spi_flash_params stmicro_spi_flash_table[] = {
 	},
 };
 
-static int stmicro_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_M25PXX_SE, offset, len);
-}
-
 struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 {
 	const struct stmicro_spi_flash_params *params;
@@ -142,7 +135,7 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 * idcode)
 	flash->name = params->name;
 
 	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = stmicro_erase;
+	flash->erase = spi_flash_cmd_erase;
 	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 256;
 	flash->sector_size = 256 * params->pages_per_sector;
diff --git a/drivers/mtd/spi/winbond.c b/drivers/mtd/spi/winbond.c
index d1358ea24b..427b71fcdc 100644
--- a/drivers/mtd/spi/winbond.c
+++ b/drivers/mtd/spi/winbond.c
@@ -10,11 +10,6 @@
 
 #include "spi_flash_internal.h"
 
-/* M25Pxx-specific commands */
-#define CMD_W25_SE		0x20	/* Sector (4K) Erase */
-#define CMD_W25_BE		0xd8	/* Block (64K) Erase */
-#define CMD_W25_CE		0xc7	/* Chip Erase */
-
 struct winbond_spi_flash_params {
 	uint16_t	id;
 	uint16_t	nr_blocks;
@@ -69,11 +64,6 @@ static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
 	},
 };
 
-static int winbond_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
-	return spi_flash_cmd_erase(flash, CMD_W25_SE, offset, len);
-}
-
 struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
 {
 	const struct winbond_spi_flash_params *params;
@@ -102,7 +92,7 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
 	flash->name = params->name;
 
 	flash->write = spi_flash_cmd_write_multi;
-	flash->erase = winbond_erase;
+	flash->erase = spi_flash_cmd_erase;
 	flash->read = spi_flash_cmd_read_fast;
 	flash->page_size = 4096;
 	flash->sector_size = 4096;