On Tue, Jun 11, 2013 at 12:23 PM, Jagannadha Sutradharudu Teki < [email protected]> wrote:
> This patch provides support to read a flash bank address register. > > reading extended/bank address register will give whether the flash > is operated on extended/bank addressing or normal addressing in > 3-byte address mode. > > Currently added an extended/bank address register reading support > for spansion flashes. > > reff' the spec for more details about bank addr register > in Page-63, Table 8.16 > http://www.spansion.com/Support/Datasheets/S25FL128S_256S_00.pdf > > Signed-off-by: Jagannadha Sutradharudu Teki <[email protected]> > Reviewed-by: Simon Glass <[email protected]> (same comment as previous patch) --- > Changes for v3: > - none > Changes for v2: > - none > > drivers/mtd/spi/spi_flash.c | 15 +++++++++++++++ > drivers/mtd/spi/spi_flash_internal.h | 4 ++++ > 2 files changed, 19 insertions(+) > > diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c > index 7aba520..193de42 100644 > --- a/drivers/mtd/spi/spi_flash.c > +++ b/drivers/mtd/spi/spi_flash.c > @@ -312,6 +312,21 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash > *flash, u8 bank_sel) > return 0; > } > > +int spi_flash_cmd_bankaddr_read(struct spi_flash *flash, void *data) > +{ > + u8 cmd; > + u8 idcode0 = flash->idcode0; > + > + if (idcode0 == 0x01) { > + cmd = CMD_BANKADDR_BRRD; > + } else { > + printf("SF: Unsupported bank addr read %02x\n", idcode0); > + return -1; > + } > + > + return spi_flash_read_common(flash, &cmd, 1, data, 1); > +} > + > #ifdef CONFIG_OF_CONTROL > int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash) > { > diff --git a/drivers/mtd/spi/spi_flash_internal.h > b/drivers/mtd/spi/spi_flash_internal.h > index 6e38494..2567bbc 100644 > --- a/drivers/mtd/spi/spi_flash_internal.h > +++ b/drivers/mtd/spi/spi_flash_internal.h > @@ -30,6 +30,7 @@ > > /* Bank addr acess commands */ > #define CMD_BANKADDR_BRWR 0x17 > +#define CMD_BANKADDR_BRRD 0x16 > > /* Common status */ > #define STATUS_WIP 0x01 > @@ -83,6 +84,9 @@ int spi_flash_cmd_write_status(struct spi_flash *flash, > u8 sr); > /* Program the bank address register */ > int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel); > > +/* Read the bank address register */ > +int spi_flash_cmd_bankaddr_read(struct spi_flash *flash, void *data); > + > /* > * Same as spi_flash_cmd_read() except it also claims/releases the SPI > * bus. Used as common part of the ->read() operation. > -- > 1.8.3 > > >
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