This patch adds set QEB support for macronix flash devices which are trying to program/read quad operations.

Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- drivers/mtd/spi/sf_internal.h | 5 +++++ drivers/mtd/spi/sf_ops.c | 26 ++++++++++++++++++++++++++ drivers/mtd/spi/sf_probe.c | 4 ++++ 3 files changed, 35 insertions(+)

diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h index a9f5a81..c69b53d 100644 --- a/drivers/mtd/spi/sf_internal.h +++ b/drivers/mtd/spi/sf_internal.h @@ -17,6 +17,7 @@ /* CFI Manufacture ID's */ #define SPI_FLASH_CFI_MFR_SPANSION 0x01 #define SPI_FLASH_CFI_MFR_STMICRO 0x20 +#define SPI_FLASH_CFI_MFR_MACRONIX 0xc2 #define SPI_FLASH_CFI_MFR_WINBOND 0xef

/* SECT flags */ @@ -61,6 +62,7 @@ /* Common status */ #define STATUS_WIP 0x01 #define STATUS_QEB_WINSPAN (1 << 1) +#define STATUS_QEB_MXIC (1 << 6) #define STATUS_PEC 0x80

/* Flash timeout values */ @@ -102,6 +104,9 @@ int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len); /* Program the status register */ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr);

+/* Set quad enbale bit for macronix flashes */ +int spi_flash_set_qeb_mxic(struct spi_flash *flash); + /* Set quad enbale bit for winbond and spansion flashes */ int spi_flash_set_qeb_winspan(struct spi_flash *flash);

diff --git a/drivers/mtd/spi/sf_ops.c b/drivers/mtd/spi/sf_ops.c index 6adee32..05fbcbd 100644 --- a/drivers/mtd/spi/sf_ops.c +++ b/drivers/mtd/spi/sf_ops.c @@ -39,6 +39,32 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr) return 0; }

+#ifdef CONFIG_SPI_FLASH_MACRONIX +int spi_flash_set_qeb_mxic(struct spi_flash *flash) +{ + u8 qeb_status; + u8 cmd; + int ret; + + cmd = CMD_READ_STATUS; + ret = spi_flash_read_common(flash, &cmd, 1, &qeb_status, 1); + if (ret < 0) { + debug("SF: fail to read status register\n"); + return ret; + } + + if (qeb_status & STATUS_QEB_MXIC) { + debug("SF: Quad enable bit is already set\n"); + } else { + ret = spi_flash_cmd_write_status(flash, STATUS_QEB_MXIC); + if (ret < 0) + return ret; + } + + return ret; +} +#endif + #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND) static int spi_flash_cmd_write_config(struct spi_flash *flash, u8 cr) { diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index 8bd06ee..88d1d0a 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -31,6 +31,10 @@ static u8 spi_read_cmds_array[] = { static int spi_flash_set_qeb(struct spi_flash *flash, u8 idcode0) { switch (idcode0) { +#ifdef CONFIG_SPI_FLASH_MACRONIX + case SPI_FLASH_CFI_MFR_MACRONIX: + return spi_flash_set_qeb_mxic(flash); +#endif #if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND) case SPI_FLASH_CFI_MFR_SPANSION: case SPI_FLASH_CFI_MFR_WINBOND: