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sf: Place the sf calls in proper order

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Placed the sf calls in proper order - erase/write/read

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-06-21 19:19:01 +05:30 committed by Jagannadha Sutradharudu Teki
parent acc237544a
commit 95e779e4f4
1 changed files with 92 additions and 92 deletions
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184
drivers/mtd/spi/spi_flash.c
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@ -68,6 +68,51 @@ 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_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
u8 status;
u8 check_status = 0x0;
u8 poll_bit = STATUS_WIP;
u8 cmd = flash->poll_cmd;
if (cmd == CMD_FLAG_STATUS) {
poll_bit = STATUS_PEC;
check_status = poll_bit;
}
ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
if (ret) {
debug("SF: fail to read %s status register\n",
cmd == CMD_READ_STATUS ? "read" : "flag");
return ret;
}
timebase = get_timer(0);
do {
WATCHDOG_RESET();
ret = spi_xfer(spi, 8, NULL, &status, 0);
if (ret)
return -1;
if ((status & poll_bit) == check_status)
break;
} while (get_timer(timebase) < timeout);
spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
if ((status & poll_bit) == check_status)
return 0;
/* Timed out */
debug("SF: time out!\n");
return -1;
}
int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
size_t cmd_len, const void *buf, size_t buf_len)
{
@ -109,6 +154,53 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
return ret;
}
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
{
u32 erase_size;
u8 cmd[4];
int ret = -1;
erase_size = flash->sector_size;
if (offset % erase_size || len % erase_size) {
debug("SF: Erase offset/length not multiple of erase size\n");
return -1;
}
if (erase_size == 4096)
cmd[0] = CMD_ERASE_4K;
else
cmd[0] = CMD_ERASE_64K;
while (len) {
#ifdef CONFIG_SPI_FLASH_BAR
u8 bank_sel;
bank_sel = offset / SPI_FLASH_16MB_BOUN;
ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
if (ret) {
debug("SF: fail to set bank%d\n", bank_sel);
return ret;
}
#endif
spi_flash_addr(offset, cmd);
debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
cmd[2], cmd[3], offset);
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;
}
return ret;
}
int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
{
@ -218,98 +310,6 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
return ret;
}
int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
unsigned long timebase;
int ret;
u8 status;
u8 check_status = 0x0;
u8 poll_bit = STATUS_WIP;
u8 cmd = flash->poll_cmd;
if (cmd == CMD_FLAG_STATUS) {
poll_bit = STATUS_PEC;
check_status = poll_bit;
}
ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
if (ret) {
debug("SF: fail to read %s status register\n",
cmd == CMD_READ_STATUS ? "read" : "flag");
return ret;
}
timebase = get_timer(0);
do {
WATCHDOG_RESET();
ret = spi_xfer(spi, 8, NULL, &status, 0);
if (ret)
return -1;
if ((status & poll_bit) == check_status)
break;
} while (get_timer(timebase) < timeout);
spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
if ((status & poll_bit) == check_status)
return 0;
/* Timed out */
debug("SF: time out!\n");
return -1;
}
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
{
u32 erase_size;
u8 cmd[4];
int ret = -1;
erase_size = flash->sector_size;
if (offset % erase_size || len % erase_size) {
debug("SF: Erase offset/length not multiple of erase size\n");
return -1;
}
if (erase_size == 4096)
cmd[0] = CMD_ERASE_4K;
else
cmd[0] = CMD_ERASE_64K;
while (len) {
#ifdef CONFIG_SPI_FLASH_BAR
u8 bank_sel;
bank_sel = offset / SPI_FLASH_16MB_BOUN;
ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
if (ret) {
debug("SF: fail to set bank%d\n", bank_sel);
return ret;
}
#endif
spi_flash_addr(offset, cmd);
debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
cmd[2], cmd[3], offset);
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;
}
return ret;
}
int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
{
u8 cmd;