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sf: Unify spi_flash write code

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Move common flash write code into spi_flash_write_common().

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-06-21 19:19:00 +05:30 • committed by Jagannadha Sutradharudu Teki
parent 615a156167
commit acc237544a
2 changed files with 63 additions and 67 deletions
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120
drivers/mtd/spi/spi_flash.c
View file

@ -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;
}

10
drivers/mtd/spi/spi_flash_internal.h
View file

@ -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