[U-Boot] [PATCH v4 02/14] sf: Discover the bank addr commands

[Jagan Teki]

On Wed, Jun 19, 2013 at 9:58 AM, Simon Glass <sjg at chromium.org> wrote:
> Hi Jagan,
>
> On Thu, Jun 13, 2013 at 1:55 PM, Jagannadha Sutradharudu Teki <
> jagannadha.sutradharudu-teki at xilinx.com> wrote:
>
>> Bank/Extended addr commands are specific to particular
>> flash vendor so discover them based on the idocode0.
>>
>> Assign the discovered bank commands to spi_flash members
>> so-that the bank read/write will use their specific operations.
>>
>> Signed-off-by: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
>> ---
>> Changes for v4:
>>         - none
>> Changes for v3:
>>         - none
>> Changes for v2:
>>         - none
>>
>>  drivers/mtd/spi/spi_flash.c          | 21 +++++++++++++++++++++
>>  drivers/mtd/spi/spi_flash_internal.h | 14 ++++++++++++++
>>  include/spi_flash.h                  |  2 ++
>>  3 files changed, 37 insertions(+)
>>
>> diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
>> index 9ddd070..9c90f00 100644
>> --- a/drivers/mtd/spi/spi_flash.c
>> +++ b/drivers/mtd/spi/spi_flash.c
>> @@ -304,6 +304,27 @@ int spi_flash_cmd_bankaddr_write(struct spi_flash
>> *flash, u8 bank_sel)
>>         return 0;
>>  }
>>
>> +int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
>> +{
>> +       /* discover bank cmds */
>> +       switch (idcode0) {
>> +       case SPI_FLASH_SPANSION_IDCODE0:
>> +               flash->bank_cmd[0] = CMD_BANKADDR_BRRD;
>> +               flash->bank_cmd[1] = CMD_BANKADDR_BRWR;
>>
>
> I suggest bank_read_cmd, bank_write_cmd

Thought of same, later tried with array.
OK will make this change.

--
Thanks,
Jagan.

>
>
>> +               break;
>> +       case SPI_FLASH_STMICRO_IDCODE0:
>> +       case SPI_FLASH_WINBOND_IDCODE0:
>> +               flash->bank_cmd[0] = CMD_EXTNADDR_RDEAR;
>> +               flash->bank_cmd[1] = CMD_EXTNADDR_WREAR;
>> +               break;
>> +       default:
>> +               printf("SF: Unsupported bank commands %02x\n", idcode0);
>> +               return -1;
>> +       }
>> +
>> +       return 0;
>> +}
>> +
>>  #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 772fef6..db6c444 100644
>> --- a/drivers/mtd/spi/spi_flash_internal.h
>> +++ b/drivers/mtd/spi/spi_flash_internal.h
>> @@ -28,6 +28,17 @@
>>  #define CMD_ERASE_64K                  0xd8
>>  #define CMD_ERASE_CHIP                 0xc7
>>
>> +/* Manufacture ID's */
>> +#define SPI_FLASH_SPANSION_IDCODE0     0x01
>> +#define SPI_FLASH_STMICRO_IDCODE0      0x20
>> +#define SPI_FLASH_WINBOND_IDCODE0      0xef
>> +
>> +/* Bank addr access commands */
>> +#define CMD_BANKADDR_BRWR              0x17
>> +#define CMD_BANKADDR_BRRD              0x16
>> +#define CMD_EXTNADDR_WREAR             0xC5
>> +#define CMD_EXTNADDR_RDEAR             0xC8
>> +
>>  /* Common status */
>>  #define STATUS_WIP                     0x01
>>
>> @@ -80,6 +91,9 @@ 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);
>>
>> +/* Configure the BAR - discover the bank cmds */
>> +int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0);
>> +
>>  /*
>>   * Same as spi_flash_cmd_read() except it also claims/releases the SPI
>>   * bus. Used as common part of the ->read() operation.
>> diff --git a/include/spi_flash.h b/include/spi_flash.h
>> index 3b6a44e..50a03bf 100644
>> --- a/include/spi_flash.h
>> +++ b/include/spi_flash.h
>> @@ -38,6 +38,8 @@ struct spi_flash {
>>         u32             page_size;
>>         /* Erase (sector) size */
>>         u32             sector_size;
>> +       /* Bank cmds - cmd[0] - read, cmd[1] - write */
>> +       u8              bank_cmd[2];
>>
>>         void *memory_map;       /* Address of read-only SPI flash access */
>>         int             (*read)(struct spi_flash *flash, u32 offset,
>> --
>> 1.8.3
>>
>>
>>
> Regards,
> Simon
>
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