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sf: probe: Add support for flag status polling

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From Micron, 512MB onwards, flash requires to poll flag status
instead of read status- hence added E_FSR flag on spectific
flash parts.

Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
This commit is contained in:
Jagannadha Sutradharudu Teki 2013-10-02 19:37:43 +05:30
parent f4f51a8ff8
commit 0f6232801c
2 changed files with 12 additions and 5 deletions
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16
drivers/mtd/spi/spi_flash_probe.c
View File

@ -94,10 +94,10 @@ static const struct spi_flash_params spi_flash_params_table[] = {
{"N25Q128A", 0x20bb18, 0x0, 64 * 1024, 256, SECT_4K},
{"N25Q256", 0x20ba19, 0x0, 64 * 1024, 512, SECT_4K},
{"N25Q256A", 0x20bb19, 0x0, 64 * 1024, 512, SECT_4K},
{"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024, SECT_4K},
{"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024, SECT_4K},
{"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048, SECT_4K},
{"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048, SECT_4K},
{"N25Q512", 0x20ba20, 0x0, 64 * 1024, 1024, E_FSR | SECT_4K},
{"N25Q512A", 0x20bb20, 0x0, 64 * 1024, 1024, E_FSR | SECT_4K},
{"N25Q1024", 0x20ba21, 0x0, 64 * 1024, 2048, E_FSR | SECT_4K},
{"N25Q1024A", 0x20bb21, 0x0, 64 * 1024, 2048, E_FSR | SECT_4K},
#endif
#ifdef CONFIG_SPI_FLASH_SST /* SST */
{"SST25VF040B", 0xbf258d, 0x0, 64 * 1024, 8, SECT_4K | SST_WP},
@ -187,7 +187,6 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
flash->spi = spi;
flash->name = params->name;
flash->poll_cmd = CMD_READ_STATUS;
/* Assign spi_flash ops */
flash->write = spi_flash_cmd_write_multi;
@ -215,6 +214,13 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode)
flash->erase_size = flash->sector_size;
}
/* Poll cmd seclection */
flash->poll_cmd = CMD_READ_STATUS;
#ifdef CONFIG_SPI_FLASH_STMICRO
if (params->flags & E_FSR)
flash->poll_cmd = CMD_FLAG_STATUS;
#endif
/* Flash powers up read-only, so clear BP# bits */
#if defined(CONFIG_SPI_FLASH_ATMEL) || \
defined(CONFIG_SPI_FLASH_MACRONIX) || \

1
include/spi_flash.h
View File

@ -20,6 +20,7 @@
/* SECT flags */
#define SECT_4K (1 << 1)
#define SECT_32K (1 << 2)
#define E_FSR (1 << 3)
/* SST specific macros */
#ifdef CONFIG_SPI_FLASH_SST