diff options
| author | Jagan Teki <jteki@openedev.com> | 2015-09-02 11:39:47 +0530 |
|---|---|---|
| committer | Jagan Teki <jteki@openedev.com> | 2015-10-25 20:17:03 +0530 |
| commit | 234a9e1c605c45748c7a9503e4424c405738fb0c (patch) | |
| tree | 32e85b26e362423a3fd761d331b8f6415ebf6467 /drivers | |
| parent | 3c75ade2b38ea987b79b7ef74d64301b49aa306d (diff) | |
| download | talos-obmc-uboot-234a9e1c605c45748c7a9503e4424c405738fb0c.tar.gz talos-obmc-uboot-234a9e1c605c45748c7a9503e4424c405738fb0c.zip | |
sf: Add spi_flash_read_bar
Add spi_flash_read_bar function for reading bar and
discovering bar commands at probe time.
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Jagan Teki <jteki@openedev.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/spi/sf_probe.c | 53 |
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index 954376de15..f17ec173bf 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -99,6 +99,37 @@ static int spi_flash_set_qeb(struct spi_flash *flash, u8 idcode0) } } +#ifdef CONFIG_SPI_FLASH_BAR +static int spi_flash_read_bank(struct spi_flash *flash, u8 idcode0) +{ + u8 curr_bank = 0; + int ret; + + if (flash->size <= SPI_FLASH_16MB_BOUN) + goto bank_end; + + switch (idcode0) { + case SPI_FLASH_CFI_MFR_SPANSION: + flash->bank_read_cmd = CMD_BANKADDR_BRRD; + flash->bank_write_cmd = CMD_BANKADDR_BRWR; + default: + flash->bank_read_cmd = CMD_EXTNADDR_RDEAR; + flash->bank_write_cmd = CMD_EXTNADDR_WREAR; + } + + ret = spi_flash_read_common(flash, &flash->bank_read_cmd, 1, + &curr_bank, 1); + if (ret) { + debug("SF: fail to read bank addr register\n"); + return ret; + } + +bank_end: + flash->bank_curr = curr_bank; + return 0; +} +#endif + static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode, struct spi_flash *flash) { @@ -235,25 +266,9 @@ static int spi_flash_validate_params(struct spi_slave *spi, u8 *idcode, /* Configure the BAR - discover bank cmds and read current bank */ #ifdef CONFIG_SPI_FLASH_BAR - u8 curr_bank = 0; - if (flash->size > SPI_FLASH_16MB_BOUN) { - int ret; - - flash->bank_read_cmd = (idcode[0] == 0x01) ? - CMD_BANKADDR_BRRD : CMD_EXTNADDR_RDEAR; - flash->bank_write_cmd = (idcode[0] == 0x01) ? - CMD_BANKADDR_BRWR : CMD_EXTNADDR_WREAR; - - ret = spi_flash_read_common(flash, &flash->bank_read_cmd, 1, - &curr_bank, 1); - if (ret) { - debug("SF: fail to read bank addr register\n"); - return ret; - } - flash->bank_curr = curr_bank; - } else { - flash->bank_curr = curr_bank; - } + int ret = spi_flash_read_bank(flash, idcode[0]); + if (ret < 0) + return ret; #endif /* Flash powers up read-only, so clear BP# bits */ |
