[U-Boot] [PATCH v3 1/4] sf: Unify spi_flash write code
Jagannadha Sutradharudu Teki
jagannadha.sutradharudu-teki at xilinx.com
Fri Jun 21 15:49:00 CEST 2013
Move common flash write code into spi_flash_write_common().
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
Acked-by: Simon Glass <sjg at chromium.org>
---
Changes for v3:
- Used proper comments on spi_flash_write_common
Changes for v2:
-
drivers/mtd/spi/spi_flash.c | 120 ++++++++++++++++-------------------
drivers/mtd/spi/spi_flash_internal.h | 10 +++
2 files changed, 63 insertions(+), 67 deletions(-)
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 6ce82c1..03cecef 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -68,15 +68,15 @@ int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
}
-int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
- size_t len, const void *buf)
+int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
+ size_t cmd_len, const void *buf, size_t buf_len)
{
- unsigned long byte_addr, page_size;
- size_t chunk_len, actual;
+ struct spi_slave *spi = flash->spi;
+ unsigned long timeout = SPI_FLASH_PROG_TIMEOUT;
int ret;
- u8 cmd[4];
- page_size = flash->page_size;
+ if (buf == NULL)
+ timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT;
ret = spi_claim_bus(flash->spi);
if (ret) {
@@ -84,6 +84,41 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
return ret;
}
+ ret = spi_flash_cmd_write_enable(flash);
+ if (ret < 0) {
+ debug("SF: enabling write failed\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len);
+ if (ret < 0) {
+ debug("SF: write cmd failed\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_wait_ready(flash, timeout);
+ if (ret < 0) {
+ debug("SF: write %s timed out\n",
+ timeout == SPI_FLASH_PROG_TIMEOUT ?
+ "program" : "page erase");
+ return ret;
+ }
+
+ spi_release_bus(spi);
+
+ return ret;
+}
+
+int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
+ size_t len, const void *buf)
+{
+ unsigned long byte_addr, page_size;
+ size_t chunk_len, actual;
+ u8 cmd[4];
+ int ret = -1;
+
+ page_size = flash->page_size;
+
cmd[0] = CMD_PAGE_PROGRAM;
for (actual = 0; actual < len; actual += chunk_len) {
#ifdef CONFIG_SPI_FLASH_BAR
@@ -108,27 +143,16 @@ int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
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);
- ret = spi_flash_cmd_write_enable(flash);
- if (ret < 0) {
- debug("SF: enabling write failed\n");
- break;
- }
-
- ret = spi_flash_cmd_write(flash->spi, cmd, 4,
- buf + actual, chunk_len);
+ ret = spi_flash_write_common(flash, cmd, sizeof(cmd),
+ buf + actual, chunk_len);
if (ret < 0) {
debug("SF: write failed\n");
break;
}
- ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
- if (ret)
- break;
-
offset += chunk_len;
}
- spi_release_bus(flash->spi);
return ret;
}
@@ -242,8 +266,8 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
{
u32 erase_size;
- int ret;
u8 cmd[4];
+ int ret = -1;
erase_size = flash->sector_size;
if (offset % erase_size || len % erase_size) {
@@ -251,12 +275,6 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
return -1;
}
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: Unable to claim SPI bus\n");
- return ret;
- }
-
if (erase_size == 4096)
cmd[0] = CMD_ERASE_4K;
else
@@ -279,24 +297,16 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
cmd[2], cmd[3], offset);
- ret = spi_flash_cmd_write_enable(flash);
- if (ret)
- goto out;
-
- ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
- if (ret)
- goto out;
-
- ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
- if (ret)
- goto out;
+ ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0);
+ if (ret < 0) {
+ debug("SF: erase failed\n");
+ break;
+ }
offset += erase_size;
len -= erase_size;
}
- out:
- spi_release_bus(flash->spi);
return ret;
}
@@ -305,22 +315,10 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
u8 cmd;
int ret;
- ret = spi_flash_cmd_write_enable(flash);
- if (ret < 0) {
- debug("SF: enabling write failed\n");
- return ret;
- }
-
cmd = CMD_WRITE_STATUS;
- ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
- if (ret) {
- debug("SF: fail to write status register\n");
- return ret;
- }
-
- ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
+ ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1);
if (ret < 0) {
- debug("SF: write status register timed out\n");
+ debug("SF: fail to write status register\n");
return ret;
}
@@ -339,25 +337,13 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
}
cmd = flash->bank_write_cmd;
- ret = spi_flash_cmd_write_enable(flash);
+ ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1);
if (ret < 0) {
- debug("SF: enabling write failed\n");
- return ret;
- }
-
- ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &bank_sel, 1);
- if (ret) {
- debug("SF: fail to write bank addr register\n");
+ debug("SF: fail to write bank register\n");
return ret;
}
flash->bank_curr = bank_sel;
- ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
- if (ret < 0) {
- debug("SF: write bank addr register timed out\n");
- return ret;
- }
-
return 0;
}
diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h
index 8147f27..be3c768 100644
--- a/drivers/mtd/spi/spi_flash_internal.h
+++ b/drivers/mtd/spi/spi_flash_internal.h
@@ -108,6 +108,16 @@ int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
*/
int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
size_t cmd_len, void *data, size_t data_len);
+/*
+ * Used for spi_flash write operation
+ * - SPI claim
+ * - spi_flash_cmd_write_enable
+ * - spi_flash_cmd_write
+ * - spi_flash_cmd_wait_ready
+ * - SPI release
+ */
+int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
+ size_t cmd_len, const void *buf, size_t buf_len);
/*
* Send the read status command to the device and wait for the wip
--
1.8.3
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