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