[U-Boot] [PATCH] imx: mx7dsabresd: Add QSPI support

[Stefano Babic <sbabic@denx.de>]

On 30/11/2015 10:45, Peng Fan wrote:
> Support qspi flashes for mx7dsabresd
> 1. introduce pin mux settings
> 2. enable qspi clock
> 3. introduce related macro definitions
> 
> Default QSPI is not enabled, since we need hardware rework to use QSPI,
> see SPF-28590, page 9:
> "
> QSPI signals are muxed with EPDC_D[7:0]
> When using QSPI: de-populate R388-R391, R396-R399
> populate R392-R395, R299, R300
> "
> 
> After hardware rework, define CONFIG_FSL_QSPI in mx7dsabresd.h. qspi
> flashes can be deteced and read/erase/write. Log info:
> "
> => sf probe
> SF: Detected MX25L51235F with page size 256 Bytes, erase size 64 KiB, total 64 MiB
> => sf read 0x80000000 0 0x4000000
> device 0 whole chip
> SF: 67108864 bytes @ 0x0 Read: OK
> => sf erase 0 0x4000000
> SF: 67108864 bytes @ 0x0 Erased: OK
> => sf write 0x80000000 0 0x4000000
> device 0 whole chip
> SF: 67108864 bytes @ 0x0 Written: OK
> "
> 
> Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Fabio Estevam <fabio.estevam@freescale.com>
> Cc: Adrian Alonso <aalonso@freescale.com>
> ---
>  board/freescale/mx7dsabresd/mx7dsabresd.c | 30 ++++++++++++++++++++++++++++++
>  include/configs/mx7dsabresd.h             | 15 +++++++++++++++
>  2 files changed, 45 insertions(+)
> 
> diff --git a/board/freescale/mx7dsabresd/mx7dsabresd.c b/board/freescale/mx7dsabresd/mx7dsabresd.c
> index 6c863da..f8ae973 100644
> --- a/board/freescale/mx7dsabresd/mx7dsabresd.c
> +++ b/board/freescale/mx7dsabresd/mx7dsabresd.c
> @@ -44,6 +44,9 @@ DECLARE_GLOBAL_DATA_PTR;
>  #define LCD_PAD_CTRL    (PAD_CTL_HYS | PAD_CTL_PUS_PU100KOHM | \
>  	PAD_CTL_DSE_3P3V_49OHM)
>  
> +#define QSPI_PAD_CTRL	\
> +	(PAD_CTL_DSE_3P3V_49OHM | PAD_CTL_PUE | PAD_CTL_PUS_PU47KOHM)
> +
>  #ifdef CONFIG_SYS_I2C_MXC
>  #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
>  /* I2C1 for PMIC */
> @@ -455,6 +458,29 @@ int board_phy_config(struct phy_device *phydev)
>  }
>  #endif
>  
> +#ifdef CONFIG_FSL_QSPI
> +static iomux_v3_cfg_t const quadspi_pads[] = {
> +	MX7D_PAD_EPDC_DATA00__QSPI_A_DATA0 | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +	MX7D_PAD_EPDC_DATA01__QSPI_A_DATA1 | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +	MX7D_PAD_EPDC_DATA02__QSPI_A_DATA2 | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +	MX7D_PAD_EPDC_DATA03__QSPI_A_DATA3 | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +	MX7D_PAD_EPDC_DATA05__QSPI_A_SCLK  | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +	MX7D_PAD_EPDC_DATA06__QSPI_A_SS0_B | MUX_PAD_CTRL(QSPI_PAD_CTRL),
> +};
> +
> +int board_qspi_init(void)
> +{
> +	/* Set the iomux */
> +	imx_iomux_v3_setup_multiple_pads(quadspi_pads,
> +					 ARRAY_SIZE(quadspi_pads));
> +
> +	/* Set the clock */
> +	set_clk_qspi();
> +
> +	return 0;
> +}
> +#endif
> +
>  int board_early_init_f(void)
>  {
>  	setup_iomux_uart();
> @@ -481,6 +507,10 @@ int board_init(void)
>  	setup_lcd();
>  #endif
>  
> +#ifdef CONFIG_FSL_QSPI
> +	board_qspi_init();
> +#endif
> +
>  	return 0;
>  }
>  
> diff --git a/include/configs/mx7dsabresd.h b/include/configs/mx7dsabresd.h
> index cc98547..22e515c 100644
> --- a/include/configs/mx7dsabresd.h
> +++ b/include/configs/mx7dsabresd.h
> @@ -236,4 +236,19 @@
>  #define CONFIG_VIDEO_BMP_LOGO
>  #endif
>  
> +#ifdef CONFIG_FSL_QSPI
> +#define CONFIG_CMD_SF
> +#define CONFIG_SPI_FLASH
> +#define CONFIG_SPI_FLASH_MACRONIX
> +#define CONFIG_SPI_FLASH_BAR
> +#define CONFIG_SF_DEFAULT_BUS		0
> +#define CONFIG_SF_DEFAULT_CS		0
> +#define CONFIG_SF_DEFAULT_SPEED		40000000
> +#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
> +#define FSL_QSPI_FLASH_NUM		1
> +#define FSL_QSPI_FLASH_SIZE		SZ_64M
> +#define QSPI0_BASE_ADDR			QSPI1_IPS_BASE_ADDR
> +#define QSPI0_AMBA_BASE			QSPI0_ARB_BASE_ADDR
> +#endif
> +
>  #endif	/* __CONFIG_H */
> 

Reviewed-by: Stefano Babic <sbabic@denx.de>

Best regards,
Stefano Babic

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