You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
161 lines
4.6 KiB
161 lines
4.6 KiB
From fb9ed0ef6f0ba6b6535c64dcfcf45c161723e56f Mon Sep 17 00:00:00 2001
|
|
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
|
Date: Tue, 6 Nov 2012 19:31:38 +0100
|
|
Subject: sf: add generic support for 4-byte address mode
|
|
|
|
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
|
|
|
|
--- a/drivers/mtd/spi/spi_flash.c
|
|
+++ b/drivers/mtd/spi/spi_flash.c
|
|
@@ -18,19 +18,35 @@
|
|
static void spi_flash_addr(struct spi_flash *flash, u32 addr, u8 *cmd, u8 *cmd_len)
|
|
{
|
|
/* cmd[0] is actual command */
|
|
- cmd[1] = addr >> 16;
|
|
- cmd[2] = addr >> 8;
|
|
- cmd[3] = addr >> 0;
|
|
- *cmd_len = 4;
|
|
+ if (spi_flash_use_4byte_mode(flash)) {
|
|
+ cmd[1] = addr >> 24;
|
|
+ cmd[2] = addr >> 16;
|
|
+ cmd[3] = addr >> 8;
|
|
+ cmd[4] = addr >> 0;
|
|
+ *cmd_len = 5;
|
|
+ } else {
|
|
+ cmd[1] = addr >> 16;
|
|
+ cmd[2] = addr >> 8;
|
|
+ cmd[3] = addr >> 0;
|
|
+ *cmd_len = 4;
|
|
+ }
|
|
}
|
|
|
|
static void spi_flash_page_addr(struct spi_flash *flash, u32 page_addr, u32 byte_addr, u8 *cmd, u8 *cmd_len)
|
|
{
|
|
/* cmd[0] is actual command */
|
|
- cmd[1] = page_addr >> 8;
|
|
- cmd[2] = page_addr >> 0;
|
|
- cmd[3] = byte_addr;
|
|
- *cmd_len = 4;
|
|
+ if (spi_flash_use_4byte_mode(flash)) {
|
|
+ cmd[1] = page_addr >> 16;
|
|
+ cmd[2] = page_addr >> 8;
|
|
+ cmd[3] = page_addr >> 0;
|
|
+ cmd[4] = byte_addr;
|
|
+ *cmd_len = 5;
|
|
+ } else {
|
|
+ cmd[1] = page_addr >> 8;
|
|
+ cmd[2] = page_addr >> 0;
|
|
+ cmd[3] = byte_addr;
|
|
+ *cmd_len = 4;
|
|
+ }
|
|
}
|
|
|
|
static int spi_flash_read_write(struct spi_slave *spi,
|
|
@@ -81,7 +97,7 @@ int spi_flash_cmd_write_multi(struct spi
|
|
unsigned long page_addr, byte_addr, page_size;
|
|
size_t chunk_len, actual;
|
|
int ret;
|
|
- u8 cmd[4], cmd_len;
|
|
+ u8 cmd[5], cmd_len;
|
|
|
|
page_size = flash->page_size;
|
|
page_addr = offset / page_size;
|
|
@@ -99,8 +115,8 @@ int spi_flash_cmd_write_multi(struct spi
|
|
|
|
spi_flash_page_addr(flash, page_addr, byte_addr, cmd, &cmd_len);
|
|
|
|
- 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_cmd_write_enable(flash);
|
|
if (ret < 0) {
|
|
@@ -146,7 +162,7 @@ int spi_flash_read_common(struct spi_fla
|
|
int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
|
|
size_t len, void *data)
|
|
{
|
|
- u8 cmd[5], cmd_len;
|
|
+ u8 cmd[6], cmd_len;
|
|
|
|
cmd[0] = CMD_READ_ARRAY_FAST;
|
|
spi_flash_addr(flash, offset, cmd, &cmd_len);
|
|
@@ -202,7 +218,7 @@ int spi_flash_cmd_erase(struct spi_flash
|
|
{
|
|
u32 start, end, erase_size;
|
|
int ret;
|
|
- u8 cmd[4], cmd_len;
|
|
+ u8 cmd[5], cmd_len;
|
|
|
|
erase_size = flash->sector_size;
|
|
if (offset % erase_size || len % erase_size) {
|
|
@@ -227,8 +243,8 @@ int spi_flash_cmd_erase(struct spi_flash
|
|
spi_flash_addr(flash, offset, cmd, &cmd_len);
|
|
offset += erase_size;
|
|
|
|
- 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_cmd_write_enable(flash);
|
|
if (ret)
|
|
@@ -409,6 +425,12 @@ int spi_flash_probe_spl(struct spi_flash
|
|
goto err_manufacturer_probe;
|
|
}
|
|
|
|
+ ret = spi_flash_set_4byte_mode(flash);
|
|
+ if (ret) {
|
|
+ debug("SF: Failed to enable 4 byte mode: %d\n", ret);
|
|
+ goto err_manufacturer_probe;
|
|
+ }
|
|
+
|
|
spi_release_bus(spi);
|
|
|
|
return 0;
|
|
--- a/drivers/mtd/spi/spi_flash_internal.h
|
|
+++ b/drivers/mtd/spi/spi_flash_internal.h
|
|
@@ -97,6 +97,31 @@ int spi_flash_cmd_wait_ready(struct spi_
|
|
/* Erase sectors. */
|
|
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len);
|
|
|
|
+#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
|
|
+static inline int spi_flash_use_4byte_mode(struct spi_flash *flash)
|
|
+{
|
|
+ return NULL != flash->set_4byte_mode;
|
|
+}
|
|
+
|
|
+static inline int spi_flash_set_4byte_mode(struct spi_flash *flash)
|
|
+{
|
|
+ if (spi_flash_use_4byte_mode(flash))
|
|
+ return flash->set_4byte_mode(flash);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#else
|
|
+static inline int spi_flash_use_4byte_mode(struct spi_flash *flash)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static inline int spi_flash_set_4byte_mode(struct spi_flash *flash)
|
|
+{
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
/* Manufacturer-specific probe functions */
|
|
int spi_flash_probe_spansion(struct spi_flash *flash, u8 *idcode);
|
|
int spi_flash_probe_atmel(struct spi_flash *flash, u8 *idcode);
|
|
--- a/include/spi_flash.h
|
|
+++ b/include/spi_flash.h
|
|
@@ -46,6 +46,9 @@ struct spi_flash {
|
|
size_t len, const void *buf);
|
|
int (*erase)(struct spi_flash *flash, u32 offset,
|
|
size_t len);
|
|
+#ifdef CONFIG_SPI_FLASH_4BYTE_MODE
|
|
+ int (*set_4byte_mode)(struct spi_flash *flash);
|
|
+#endif
|
|
};
|
|
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
|