diff options
| -rw-r--r-- | drivers/mtd/spi/sf_internal.h | 1 | ||||
| -rw-r--r-- | drivers/mtd/spi/sf_ops.c | 64 | ||||
| -rw-r--r-- | drivers/mtd/spi/sf_probe.c | 4 | ||||
| -rw-r--r-- | include/spi_flash.h | 2 |
4 files changed, 60 insertions, 11 deletions
diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h index 53998fc..8a3e5ec 100644 --- a/drivers/mtd/spi/sf_internal.h +++ b/drivers/mtd/spi/sf_internal.h @@ -53,6 +53,7 @@ enum { enum spi_nor_option_flags { SNOR_F_SST_WR = (1 << 0), + SNOR_F_USE_FSR = (1 << 1), }; #define SPI_FLASH_3B_ADDR_LEN 3 diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index c820d48..f2a9244 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -41,6 +41,20 @@ int spi_flash_cmd_read_status(struct spi_flash *flash, u8 *rs) return 0; } +static int read_fsr(struct spi_flash *flash, u8 *fsr) +{ + int ret; + const u8 cmd = CMD_FLAG_STATUS; + + ret = spi_flash_read_common(flash, &cmd, 1, fsr, 1); + if (ret < 0) { + debug("SF: fail to read flag status register\n"); + return ret; + } + + return 0; +} + int spi_flash_cmd_write_status(struct spi_flash *flash, u8 ws) { u8 cmd; @@ -139,22 +153,60 @@ static void spi_flash_dual_flash(struct spi_flash *flash, u32 *addr) } #endif -int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) +static int spi_flash_sr_ready(struct spi_flash *flash) { u8 sr; + int ret; + + ret = spi_flash_cmd_read_status(flash, &sr); + if (ret < 0) + return ret; + + return !(sr & STATUS_WIP); +} + +static int spi_flash_fsr_ready(struct spi_flash *flash) +{ + u8 fsr; + int ret; + + ret = read_fsr(flash, &fsr); + if (ret < 0) + return ret; + + return fsr & STATUS_PEC; +} + +static int spi_flash_ready(struct spi_flash *flash) +{ + int sr, fsr; + + sr = spi_flash_sr_ready(flash); + if (sr < 0) + return sr; + + fsr = 1; + if (flash->flags & SNOR_F_USE_FSR) { + fsr = spi_flash_fsr_ready(flash); + if (fsr < 0) + return fsr; + } + + return sr && fsr; +} + +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout) +{ int timebase, ret; timebase = get_timer(0); while (get_timer(timebase) < timeout) { - ret = spi_flash_cmd_read_status(flash, &sr); + ret = spi_flash_ready(flash); if (ret < 0) return ret; - - if (!(sr & STATUS_WIP)) + if (ret) return 0; - else - break; } printf("SF: Timeout!\n"); diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index 2634e90..f591ab1 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -257,11 +257,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode, flash->dummy_byte = 1; } - /* Poll cmd selection */ - flash->poll_cmd = CMD_READ_STATUS; #ifdef CONFIG_SPI_FLASH_STMICRO if (params->flags & E_FSR) - flash->poll_cmd = CMD_FLAG_STATUS; + flash->flags |= SNOR_F_USE_FSR; #endif /* Configure the BAR - discover bank cmds and read current bank */ diff --git a/include/spi_flash.h b/include/spi_flash.h index 8d85468..4312d3d 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -49,7 +49,6 @@ struct spi_slave; * @bank_read_cmd: Bank read cmd * @bank_write_cmd: Bank write cmd * @bank_curr: Current flash bank - * @poll_cmd: Poll cmd - for flash erase/program * @erase_cmd: Erase cmd 4K, 32K, 64K * @read_cmd: Read cmd - Array Fast, Extn read and quad read. * @write_cmd: Write cmd - page and quad program. @@ -82,7 +81,6 @@ struct spi_flash { u8 bank_write_cmd; u8 bank_curr; #endif - u8 poll_cmd; u8 erase_cmd; u8 read_cmd; u8 write_cmd; |