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authorJagan Teki <jteki@openedev.com>2015-09-02 11:39:47 +0530
committerJagan Teki <jteki@openedev.com>2015-10-25 20:17:03 +0530
commit234a9e1c605c45748c7a9503e4424c405738fb0c (patch)
tree32e85b26e362423a3fd761d331b8f6415ebf6467 /drivers/mtd
parent3c75ade2b38ea987b79b7ef74d64301b49aa306d (diff)
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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/mtd')
-rw-r--r--drivers/mtd/spi/sf_probe.c53
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index 954376d..f17ec17 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 */