--- /dev/null
+From 3af3addee645bd81537be1ddee49969f8dfc64ee Mon Sep 17 00:00:00 2001
+From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+Date: Sun, 13 Oct 2013 15:24:56 +0200
+Subject: sf: add support for 4-byte addressing
+
+Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+
+diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
+index 732ddf8..c5e8eb1 100644
+--- a/drivers/mtd/spi/sf_internal.h
++++ b/drivers/mtd/spi/sf_internal.h
+@@ -38,12 +38,14 @@
+ #define CMD_READ_ID 0x9f
+
+ /* Bank addr access commands */
+-#ifdef CONFIG_SPI_FLASH_BAR
+-# define CMD_BANKADDR_BRWR 0x17
+-# define CMD_BANKADDR_BRRD 0x16
+-# define CMD_EXTNADDR_WREAR 0xC5
+-# define CMD_EXTNADDR_RDEAR 0xC8
+-#endif
++#define CMD_BANKADDR_BRWR 0x17
++#define CMD_BANKADDR_BRRD 0x16
++#define CMD_EXTNADDR_WREAR 0xC5
++#define CMD_EXTNADDR_RDEAR 0xC8
++
++/* Macronix style 4-byte addressing */
++#define CMD_EN4B 0xb7
++#define CMD_EX4B 0xe9
+
+ /* Common status */
+ #define STATUS_WIP 0x01
+diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c
+index 207adf5..1d072f8 100644
+--- a/drivers/mtd/spi/sf_ops.c
++++ b/drivers/mtd/spi/sf_ops.c
+@@ -21,6 +21,7 @@ static void spi_flash_addr(const struct spi_flash *flash, u32 addr, u8 *cmd)
+ cmd[1] = addr >> (flash->addr_width * 8 - 8);
+ cmd[2] = addr >> (flash->addr_width * 8 - 16);
+ cmd[3] = addr >> (flash->addr_width * 8 - 24);
++ cmd[4] = addr >> (flash->addr_width * 8 - 32);
+ }
+
+ static int spi_flash_cmdsz(const struct spi_flash *flash)
+@@ -163,7 +164,7 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
+ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
+ {
+ u32 erase_size;
+- u8 cmd[4], cmd_len;
++ u8 cmd[5], cmd_len;
+ int ret = -1;
+
+ erase_size = flash->erase_size;
+@@ -188,8 +189,8 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len)
+ spi_flash_addr(flash, offset, cmd);
+ cmd_len = spi_flash_cmdsz(flash);
+
+- debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
+- cmd[2], cmd[3], offset);
++ debug("SF: erase %2x %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
++ cmd[2], cmd[3], cmd[4], offset);
+
+ ret = spi_flash_write_common(flash, cmd, cmd_len, NULL, 0);
+ if (ret < 0) {
+@@ -212,7 +213,7 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
+ {
+ unsigned long byte_addr, page_size;
+ size_t chunk_len, actual;
+- u8 cmd[4], cmd_len;
++ u8 cmd[5], cmd_len;
+ int ret = -1;
+
+ ret = spi_claim_bus(flash->spi);
+@@ -239,8 +240,8 @@ int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset,
+ spi_flash_addr(flash, offset, cmd);
+ cmd_len = spi_flash_cmdsz(flash);
+
+- debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
+- buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
++ debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x%02x } chunk_len = %zu\n",
++ buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], chunk_len);
+
+ ret = spi_flash_write_common(flash, cmd, cmd_len,
+ buf + actual, chunk_len);
+@@ -276,9 +277,13 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
+ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
+ size_t len, void *data)
+ {
+- u8 cmd[5], cmd_len, bank_sel = 0;
+- u32 remain_len, read_len;
++ u8 cmd[6], cmd_len;
++ u32 read_len;
+ int ret = -1;
++#ifdef CONFIG_SPI_FLASH_BAR
++ u8 bank_sel = 0;
++ u32 remain_len;
++#endif
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+@@ -305,12 +310,15 @@ int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
+ debug("SF: fail to set bank%d\n", bank_sel);
+ goto done;
+ }
+-#endif
++
+ remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1)) - offset;
+ if (len < remain_len)
+ read_len = len;
+ else
+ read_len = remain_len;
++#else
++ read_len = len;
++#endif
+
+ spi_flash_addr(flash, offset, cmd);
+ cmd_len = spi_flash_cmdsz(flash);
+diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
+index 84289db..ac44287 100644
+--- a/drivers/mtd/spi/sf_probe.c
++++ b/drivers/mtd/spi/sf_probe.c
+@@ -153,6 +153,25 @@ static const struct spi_flash_params spi_flash_params_table[] = {
+ */
+ };
+
++int spi_flash_4byte_set(struct spi_flash *flash, u8 idcode0, int enable)
++{
++ u8 cmd, bankaddr;
++
++ switch (idcode0) {
++ case 0xc2:
++ case 0xef:
++ case 0x1c:
++ /* Macronix style */
++ cmd = enable ? CMD_EN4B : CMD_EX4B;
++ return spi_flash_cmd(flash->spi, cmd, NULL, 0);
++ default:
++ /* Spansion style */
++ cmd = CMD_BANKADDR_BRWR;
++ bankaddr = enable << 7;
++ return spi_flash_cmd_write(flash->spi, &cmd, 1, &bankaddr, 1);
++ }
++}
++
+ static int spi_flash_validate_params(struct spi_flash *flash,
+ u8 *idcode)
+ {
+@@ -218,8 +237,18 @@ static int spi_flash_validate_params(struct spi_flash *flash,
+ flash->poll_cmd = CMD_FLAG_STATUS;
+ #endif
+
++#ifndef CONFIG_SPI_FLASH_BAR
++ /* enable 4-byte addressing if the device exceeds 16MiB */
++ if (flash->size > SPI_FLASH_16MB_BOUN) {
++ flash->addr_width = 4;
++ spi_flash_4byte_set(flash, idcode[0], 1);
++ } else {
++ flash->addr_width = 3;
++ }
++#else
+ /* Configure default 3-byte addressing */
+ flash->addr_width = 3;
++#endif
+
+ /* Configure the BAR - discover bank cmds and read current bank */
+ #ifdef CONFIG_SPI_FLASH_BAR
+--
+1.8.3.2
+
projects / openwrt.git / blobdiff