[U-Boot] [PATCH v2 2/2] imx:mx6sxsabresd add qspi support

[Peng Fan]

Hi,

On 10/09/2014 06:37 PM, Jagan Teki wrote:
> Hi Peng Fan,
> 
> Before reviewing these two patches, I'm requesting some sort work from
> your side like
> Can you update/fix the driver "drivers/spi/fsl_qspi.c" without using
> flash opcodes.
> 
> Using flash opcode's with in the (q)spi driver is not recommended
> please think on that
> direction.
Yeah, many OPCODE_XX are used in this driver. 

There is a LUT table containing 16 entries in the QSPI Controller. 
The Look-up-table or LUT consists of a number of pre-programmed sequences. Each
sequence is basically a sequence of instruction-operand pairs which when executed
sequentially generates a valid serial flash transaction. Each sequence can have a
maximum of 8 instruction-operand pairs. 
The instruction holds the flash opcode that should be pre-programmed, and the
qspi_set_lut in drivers/spi/fsl_qspi.c does this work.

It is not easy to program the lut dynamically in the driver without using the flash opcodes.
So I wonder whether CMD_xxx in drivers/mtd/spi/sf_internal.h can be used or not. Or,
can QSPI_CMD_xxx be used but not OPCODE_xx?  Actually if QSPI_CMD_xx can be used, the value
QSPI_CMD_xx is the same with OPCODE_xx, just different macro names.

Regards,
Peng.

> 
> On 9 October 2014 14:37, Peng Fan <B51431 at freescale.com> wrote:
>>
>> Hi,
>>
>> Any reply about this patch? It is long time since this patch was sent out.
>>
>> Regards,
>> Peng.
>> On 09/11/2014 10:30 AM, Fan Peng-B51431 wrote:
>>> Just CC Stefano Babic <sbabic at denx.de>
>>>
>>> Regards,
>>> Peng.
>>>
>>> -----Original Message-----
>>> From: u-boot-bounces at lists.denx.de [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Peng Fan
>>> Sent: Thursday, September 11, 2014 9:56 AM
>>> To: Estevam Fabio-R49496; Li Ye-B37916
>>> Cc: u-boot at lists.denx.de
>>> Subject: [U-Boot] [PATCH v2 2/2] imx:mx6sxsabresd add qspi support
>>>
>>> Configure the pad setting and enable qspi clock to support qspi flashes access.
>>>
>>> This patch has been tested on mx6sxsabresd board.
>>>
>>> Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
>>> ---
>>>
>>> Changelog v2:
>>>  Take Fabio's suggestion, split soc code and board code into two patches.
>>>  This patch needs 'ARM:MX6SX Add QSPI support' patch.
>>>
>>>  board/freescale/mx6sxsabresd/mx6sxsabresd.c | 40 +++++++++++++++++++++++++++++
>>>  include/configs/mx6sxsabresd.h              | 14 ++++++++++
>>>  2 files changed, 54 insertions(+)
>>>
>>> diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>>> index 5eaec1b..f9cad5a 100644
>>> --- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>>> +++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
>>> @@ -272,11 +272,51 @@ int board_mmc_init(bd_t *bis)
>>>       return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);  }
>>>
>>> +#ifdef CONFIG_FSL_QSPI
>>> +
>>> +#define QSPI_PAD_CTRL1       \
>>> +     (PAD_CTL_SRE_FAST | PAD_CTL_SPEED_HIGH | \
>>> +      PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_47K_UP | PAD_CTL_DSE_40ohm)
>>> +
>>> +static iomux_v3_cfg_t const quadspi_pads[] = {
>>> +     MX6_PAD_NAND_WP_B__QSPI2_A_DATA_0       | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_READY_B__QSPI2_A_DATA_1    | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_CE0_B__QSPI2_A_DATA_2      | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_CE1_B__QSPI2_A_DATA_3      | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_ALE__QSPI2_A_SS0_B         | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_CLE__QSPI2_A_SCLK          | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA07__QSPI2_A_DQS        | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA01__QSPI2_B_DATA_0     | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA00__QSPI2_B_DATA_1     | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_WE_B__QSPI2_B_DATA_2       | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_RE_B__QSPI2_B_DATA_3       | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA03__QSPI2_B_SS0_B      | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA02__QSPI2_B_SCLK       | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +     MX6_PAD_NAND_DATA05__QSPI2_B_DQS        | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
>>> +};
>>> +
>>> +int board_qspi_init(void)
>>> +{
>>> +     /* Set the iomux */
>>> +     imx_iomux_v3_setup_multiple_pads(quadspi_pads,
>>> +                                      ARRAY_SIZE(quadspi_pads));
>>> +
>>> +     /* Set the clock */
>>> +     enable_qspi_clk(1);
>>> +
>>> +     return 0;
>>> +}
>>> +#endif
>>> +
>>>  int board_init(void)
>>>  {
>>>       /* Address of boot parameters */
>>>       gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
>>>
>>> +#ifdef CONFIG_FSL_QSPI
>>> +     board_qspi_init();
>>> +#endif
>>> +
>>>       return 0;
>>>  }
>>>
>>> diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h index 1eda65e..00031ec 100644
>>> --- a/include/configs/mx6sxsabresd.h
>>> +++ b/include/configs/mx6sxsabresd.h
>>> @@ -201,6 +201,20 @@
>>>  /* FLASH and environment organization */  #define CONFIG_SYS_NO_FLASH
>>>
>>> +#define CONFIG_FSL_QSPI
>>> +
>>> +#ifdef CONFIG_FSL_QSPI
>>> +#define CONFIG_CMD_SF
>>> +#define CONFIG_SPI_FLASH
>>> +#define CONFIG_SPI_FLASH_SPANSION
>>> +#define CONFIG_SPI_FLASH_STMICRO
>>> +#define CONFIG_SYS_FSL_QSPI_LE
>>> +#define CONFIG_QSPI_BASE             QSPI2_BASE_ADDR
>>> +#define CONFIG_QSPI_MEMMAP_BASE              QSPI2_ARB_BASE_ADDR
>>> +#define FSL_QSPI_FLASH_SIZE          SZ_16M
>>> +#define FSL_QSPI_FLASH_NUM           2
>>> +#endif
>>> +
>>>  #define CONFIG_ENV_OFFSET            (6 * SZ_64K)
>>>  #define CONFIG_ENV_SIZE                      SZ_8K
>>>  #define CONFIG_ENV_IS_IN_MMC
>>> --
>>> 1.8.4
> 
> thanks!
>