On 29 August 2014 12:24, Hou Zhiqiang <b48...@freescale.com> wrote: > Add clear flag status register operation that some Micron SPI flash > chips required after reading the flag status register to check some > operations completion. > > Signed-off-by: Hou Zhiqiang <b48...@freescale.com> > --- > Based on git://git.denx.de/u-boot.git. > It also can be applied to git://www.denx.de/git/u-boot-mpc85xx.git. > Tested on board T2080QDS and T2080RDB.
Flag status register support is been added for stmicro flashes which are >= 512MB sizes. #ifdef CONFIG_SPI_FLASH_STMICRO if (params->flags & E_FSR) flash->poll_cmd = CMD_FLAG_STATUS; #endif Please check the condition on current tree bases, and let me know for any questions. > > drivers/mtd/spi/sf_internal.h | 9 +++++++++ > drivers/mtd/spi/sf_ops.c | 36 ++++++++++++++++++++++++++++-------- > 2 files changed, 37 insertions(+), 8 deletions(-) > > diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h > index 6bcd522..162dd87 100644 > --- a/drivers/mtd/spi/sf_internal.h > +++ b/drivers/mtd/spi/sf_internal.h > @@ -36,6 +36,7 @@ > #define CMD_WRITE_ENABLE 0x06 > #define CMD_READ_CONFIG 0x35 > #define CMD_FLAG_STATUS 0x70 > +#define CMD_CLEAR_FLAG_STATUS 0x50 > > /* Read commands */ > #define CMD_READ_ARRAY_SLOW 0x03 > @@ -59,6 +60,8 @@ > #define STATUS_QEB_WINSPAN (1 << 1) > #define STATUS_QEB_MXIC (1 << 6) > #define STATUS_PEC (1 << 7) > +#define STATUS_PROT (1 << 1) > +#define STATUS_ERASE (1 << 5) > > /* Flash timeout values */ > #define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ) > @@ -120,6 +123,12 @@ static inline int spi_flash_cmd_write_disable(struct > spi_flash *flash) > return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0); > } > > +/* Clear flag status register */ > +static inline int spi_flash_cmd_clear_flag_status(struct spi_flash *flash) > +{ > + return spi_flash_cmd(flash->spi, CMD_CLEAR_FLAG_STATUS, NULL, 0); > +} > + > /* > * Send the read status command to the device and wait for the wip > * (write-in-progress) bit to clear itself. > diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c > index 85cf22d..08ff1df 100644 > --- a/drivers/mtd/spi/sf_ops.c > +++ b/drivers/mtd/spi/sf_ops.c > @@ -160,6 +160,7 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, > unsigned long timeout) > unsigned long timebase; > unsigned long flags = SPI_XFER_BEGIN; > int ret; > + int out_of_time = 1; > u8 status; > u8 check_status = 0x0; > u8 poll_bit = STATUS_WIP; > @@ -186,22 +187,41 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, > unsigned long timeout) > WATCHDOG_RESET(); > > ret = spi_xfer(spi, 8, NULL, &status, 0); > - if (ret) > + if (ret) { > + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); > return -1; > + } > > - if ((status & poll_bit) == check_status) > + if ((status & poll_bit) == check_status) { > + out_of_time = 0; > break; > + } > > } while (get_timer(timebase) < timeout); > > spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); > > - if ((status & poll_bit) == check_status) > - return 0; > + if (out_of_time) { > + /* Timed out */ > + debug("SF: time out!\n"); > + ret = -1; > + } > +#ifdef CONFIG_SPI_FLASH_STMICRO > + else if (cmd == CMD_FLAG_STATUS) { > + if (!(status & (STATUS_PROT | STATUS_ERASE))) { > + ret = 0; > + } else { > + debug("SF: flag status error"); > + ret = -1; > + } > > - /* Timed out */ > - debug("SF: time out!\n"); > - return -1; > + if (spi_flash_cmd_clear_flag_status(flash) < 0) { > + debug("SF: clear flag status failed\n"); > + ret = -1; > + } > + } > +#endif > + return ret; > } > > int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, > @@ -234,7 +254,7 @@ int spi_flash_write_common(struct spi_flash *flash, const > u8 *cmd, > > ret = spi_flash_cmd_wait_ready(flash, timeout); > if (ret < 0) { > - debug("SF: write %s timed out\n", > + debug("SF: write %s failed\n", > timeout == SPI_FLASH_PROG_TIMEOUT ? > "program" : "page erase"); > return ret; > -- > 1.8.5 thanks! -- Jagan. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot