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sf: Poll both the read status and flag status

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Poll both the Read status and Flag status registers
for sucessful erase and program operations for the
Micron devices with E_FSR flag set in params table.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2015-03-11 14:47:57 +05:30 • committed by Jagannadha Sutradharudu Teki
parent d2f763162a
commit 06bc1756c5
1 changed files with 25 additions and 7 deletions
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32
drivers/mtd/spi/sf_ops.c
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@ -154,21 +154,17 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr)
} }
#endif #endif
int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) static int spi_flash_poll_status(struct spi_slave *spi, unsigned long timeout,
u8 cmd, u8 poll_bit)
{ {
struct spi_slave *spi = flash->spi;
unsigned long timebase; unsigned long timebase;
unsigned long flags = SPI_XFER_BEGIN; unsigned long flags = SPI_XFER_BEGIN;
int ret; int ret;
u8 status; u8 status;
u8 check_status = 0x0; u8 check_status = 0x0;
u8 poll_bit = STATUS_WIP;
u8 cmd = flash->poll_cmd;
if (cmd == CMD_FLAG_STATUS) { if (cmd == CMD_FLAG_STATUS)
poll_bit = STATUS_PEC;
check_status = poll_bit; check_status = poll_bit;
}
#ifdef CONFIG_SF_DUAL_FLASH #ifdef CONFIG_SF_DUAL_FLASH
if (spi->flags & SPI_XFER_U_PAGE) if (spi->flags & SPI_XFER_U_PAGE)
@ -204,6 +200,28 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
return -1; return -1;
} }
int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
{
struct spi_slave *spi = flash->spi;
int ret;
u8 poll_bit = STATUS_WIP;
u8 cmd = CMD_READ_STATUS;
ret = spi_flash_poll_status(spi, timeout, cmd, poll_bit);
if (ret < 0)
return ret;
if (flash->poll_cmd == CMD_FLAG_STATUS) {
poll_bit = STATUS_PEC;
cmd = CMD_FLAG_STATUS;
ret = spi_flash_poll_status(spi, timeout, cmd, poll_bit);
if (ret < 0)
return ret;
}
return 0;
}
int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
size_t cmd_len, const void *buf, size_t buf_len) size_t cmd_len, const void *buf, size_t buf_len)
{ {