[U-Boot] [PATCH 1/3] mxc_spi: move machine specifics into CPU headers

Jason Hui jason.hui at linaro.org
Tue Jan 31 10:15:40 CET 2012


Eric

On Tue, Jan 31, 2012 at 3:52 AM, Eric Nelson
<eric.nelson at boundarydevices.com> wrote:
> Move (E)CSPI register declarations into the imx-regs.h files for each supported CPU
>
> Introduce two new macros to control conditional setup
>     MXC_CSPI - Used for processors with the Configurable Serial Peripheral Interface (MX3x)
>     MXC_ECSPI - For processors with Enhanced Configurable... (MX5x, MX6x)
>
> Signed-off-by: Eric Nelson <eric.nelson at boundarydevices.com>
> Acked-by: Dirk Behme <dirk.behme at de.bosch.com>
> Acked-by: Stefano Babic <sbabic at denx.de>
> ---
>  arch/arm/include/asm/arch-mx31/imx-regs.h |   27 ++++++++
>  arch/arm/include/asm/arch-mx35/imx-regs.h |   25 ++++++++
>  arch/arm/include/asm/arch-mx5/imx-regs.h  |   30 +++++++++
>  drivers/spi/mxc_spi.c                     |   93 ++---------------------------
>  4 files changed, 88 insertions(+), 87 deletions(-)


Acked-by: Jason Liu <jason.hui at linaro.org>

Tested OK on the i.mx51evk board with SPI-PMIC

Tested-by: Jason LIu <jason.hui at linaro.org>


>
> diff --git a/arch/arm/include/asm/arch-mx31/imx-regs.h b/arch/arm/include/asm/arch-mx31/imx-regs.h
> index 798cc74..6454acb 100644
> --- a/arch/arm/include/asm/arch-mx31/imx-regs.h
> +++ b/arch/arm/include/asm/arch-mx31/imx-regs.h
> @@ -901,4 +901,31 @@ struct esdc_regs {
>  #define MXC_EHCI_IPPUE_DOWN            (1 << 8)
>  #define MXC_EHCI_IPPUE_UP              (1 << 9)
>
> +/*
> + * CSPI register definitions
> + */
> +#define MXC_CSPI
> +#define MXC_CSPICTRL_EN                (1 << 0)
> +#define MXC_CSPICTRL_MODE      (1 << 1)
> +#define MXC_CSPICTRL_XCH       (1 << 2)
> +#define MXC_CSPICTRL_SMC       (1 << 3)
> +#define MXC_CSPICTRL_POL       (1 << 4)
> +#define MXC_CSPICTRL_PHA       (1 << 5)
> +#define MXC_CSPICTRL_SSCTL     (1 << 6)
> +#define MXC_CSPICTRL_SSPOL     (1 << 7)
> +#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 24)
> +#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0x1f) << 8)
> +#define MXC_CSPICTRL_DATARATE(x)       (((x) & 0x7) << 16)
> +#define MXC_CSPICTRL_TC                (1 << 8)
> +#define MXC_CSPICTRL_RXOVF     (1 << 6)
> +#define MXC_CSPICTRL_MAXBITS   0x1f
> +
> +#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> +#define MAX_SPI_BYTES  4
> +
> +#define MXC_SPI_BASE_ADDRESSES \
> +       0x43fa4000, \
> +       0x50010000, \
> +       0x53f84000,
> +
>  #endif /* __ASM_ARCH_MX31_IMX_REGS_H */
> diff --git a/arch/arm/include/asm/arch-mx35/imx-regs.h b/arch/arm/include/asm/arch-mx35/imx-regs.h
> index df74508..e570ad1 100644
> --- a/arch/arm/include/asm/arch-mx35/imx-regs.h
> +++ b/arch/arm/include/asm/arch-mx35/imx-regs.h
> @@ -179,6 +179,31 @@
>  #define IPU_CONF_IC_EN         (1<<1)
>  #define IPU_CONF_SCI_EN                (1<<0)
>
> +/*
> + * CSPI register definitions
> + */
> +#define MXC_CSPI
> +#define MXC_CSPICTRL_EN                (1 << 0)
> +#define MXC_CSPICTRL_MODE      (1 << 1)
> +#define MXC_CSPICTRL_XCH       (1 << 2)
> +#define MXC_CSPICTRL_SMC       (1 << 3)
> +#define MXC_CSPICTRL_POL       (1 << 4)
> +#define MXC_CSPICTRL_PHA       (1 << 5)
> +#define MXC_CSPICTRL_SSCTL     (1 << 6)
> +#define MXC_CSPICTRL_SSPOL     (1 << 7)
> +#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 12)
> +#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0xfff) << 20)
> +#define MXC_CSPICTRL_DATARATE(x)       (((x) & 0x7) << 16)
> +#define MXC_CSPICTRL_TC                (1 << 7)
> +#define MXC_CSPICTRL_RXOVF     (1 << 6)
> +#define MXC_CSPICTRL_MAXBITS   0xfff
> +#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> +#define MAX_SPI_BYTES  4
> +
> +#define MXC_SPI_BASE_ADDRESSES \
> +       0x43fa4000, \
> +       0x50010000,
> +
>  #define GPIO_PORT_NUM          3
>  #define GPIO_NUM_PIN           32
>
> diff --git a/arch/arm/include/asm/arch-mx5/imx-regs.h b/arch/arm/include/asm/arch-mx5/imx-regs.h
> index 0ee88d2..4fa6658 100644
> --- a/arch/arm/include/asm/arch-mx5/imx-regs.h
> +++ b/arch/arm/include/asm/arch-mx5/imx-regs.h
> @@ -223,6 +223,36 @@
>  #define CS0_32M_CS1_32M_CS2_32M_CS3_32M                3
>
>  /*
> + * CSPI register definitions
> + */
> +#define MXC_ECSPI
> +#define MXC_CSPICTRL_EN                (1 << 0)
> +#define MXC_CSPICTRL_MODE      (1 << 1)
> +#define MXC_CSPICTRL_XCH       (1 << 2)
> +#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 12)
> +#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0xfff) << 20)
> +#define MXC_CSPICTRL_PREDIV(x) (((x) & 0xF) << 12)
> +#define MXC_CSPICTRL_POSTDIV(x)        (((x) & 0xF) << 8)
> +#define MXC_CSPICTRL_SELCHAN(x)        (((x) & 0x3) << 18)
> +#define MXC_CSPICTRL_MAXBITS   0xfff
> +#define MXC_CSPICTRL_TC                (1 << 7)
> +#define MXC_CSPICTRL_RXOVF     (1 << 6)
> +#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> +#define MAX_SPI_BYTES  32
> +
> +/* Bit position inside CTRL register to be associated with SS */
> +#define MXC_CSPICTRL_CHAN      18
> +
> +/* Bit position inside CON register to be associated with SS */
> +#define MXC_CSPICON_POL                4
> +#define MXC_CSPICON_PHA                0
> +#define MXC_CSPICON_SSPOL      12
> +#define MXC_SPI_BASE_ADDRESSES \
> +       CSPI1_BASE_ADDR, \
> +       CSPI2_BASE_ADDR, \
> +       CSPI3_BASE_ADDR,
> +
> +/*
>  * Number of GPIO pins per port
>  */
>  #define GPIO_NUM_PIN            32
> diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c
> index 2fa7486..2e15318 100644
> --- a/drivers/spi/mxc_spi.c
> +++ b/drivers/spi/mxc_spi.c
> @@ -33,93 +33,12 @@
>
>  #error "i.MX27 CSPI not supported due to drastic differences in register definitions" \
>  "See linux mxc_spi driver from Freescale for details."
> -
> -#elif defined(CONFIG_MX31)
> -
> -#define MXC_CSPICTRL_EN                (1 << 0)
> -#define MXC_CSPICTRL_MODE      (1 << 1)
> -#define MXC_CSPICTRL_XCH       (1 << 2)
> -#define MXC_CSPICTRL_SMC       (1 << 3)
> -#define MXC_CSPICTRL_POL       (1 << 4)
> -#define MXC_CSPICTRL_PHA       (1 << 5)
> -#define MXC_CSPICTRL_SSCTL     (1 << 6)
> -#define MXC_CSPICTRL_SSPOL     (1 << 7)
> -#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 24)
> -#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0x1f) << 8)
> -#define MXC_CSPICTRL_DATARATE(x)       (((x) & 0x7) << 16)
> -#define MXC_CSPICTRL_TC                (1 << 8)
> -#define MXC_CSPICTRL_RXOVF     (1 << 6)
> -#define MXC_CSPICTRL_MAXBITS   0x1f
> -
> -#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> -#define MAX_SPI_BYTES  4
> -
> -static unsigned long spi_bases[] = {
> -       0x43fa4000,
> -       0x50010000,
> -       0x53f84000,
> -};
> -
> -#elif defined(CONFIG_MX51)
> -
> -#define MXC_CSPICTRL_EN                (1 << 0)
> -#define MXC_CSPICTRL_MODE      (1 << 1)
> -#define MXC_CSPICTRL_XCH       (1 << 2)
> -#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 12)
> -#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0xfff) << 20)
> -#define MXC_CSPICTRL_PREDIV(x) (((x) & 0xF) << 12)
> -#define MXC_CSPICTRL_POSTDIV(x)        (((x) & 0xF) << 8)
> -#define MXC_CSPICTRL_SELCHAN(x)        (((x) & 0x3) << 18)
> -#define MXC_CSPICTRL_MAXBITS   0xfff
> -#define MXC_CSPICTRL_TC                (1 << 7)
> -#define MXC_CSPICTRL_RXOVF     (1 << 6)
> -
> -#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> -#define MAX_SPI_BYTES  32
> -
> -/* Bit position inside CTRL register to be associated with SS */
> -#define MXC_CSPICTRL_CHAN      18
> -
> -/* Bit position inside CON register to be associated with SS */
> -#define MXC_CSPICON_POL                4
> -#define MXC_CSPICON_PHA                0
> -#define MXC_CSPICON_SSPOL      12
> -
> -static unsigned long spi_bases[] = {
> -       CSPI1_BASE_ADDR,
> -       CSPI2_BASE_ADDR,
> -       CSPI3_BASE_ADDR,
> -};
> -
> -#elif defined(CONFIG_MX35)
> -
> -#define MXC_CSPICTRL_EN                (1 << 0)
> -#define MXC_CSPICTRL_MODE      (1 << 1)
> -#define MXC_CSPICTRL_XCH       (1 << 2)
> -#define MXC_CSPICTRL_SMC       (1 << 3)
> -#define MXC_CSPICTRL_POL       (1 << 4)
> -#define MXC_CSPICTRL_PHA       (1 << 5)
> -#define MXC_CSPICTRL_SSCTL     (1 << 6)
> -#define MXC_CSPICTRL_SSPOL     (1 << 7)
> -#define MXC_CSPICTRL_CHIPSELECT(x)     (((x) & 0x3) << 12)
> -#define MXC_CSPICTRL_BITCOUNT(x)       (((x) & 0xfff) << 20)
> -#define MXC_CSPICTRL_DATARATE(x)       (((x) & 0x7) << 16)
> -#define MXC_CSPICTRL_TC                (1 << 7)
> -#define MXC_CSPICTRL_RXOVF     (1 << 6)
> -#define MXC_CSPICTRL_MAXBITS   0xfff
> -
> -#define MXC_CSPIPERIOD_32KHZ   (1 << 15)
> -#define MAX_SPI_BYTES  4
> +#endif
>
>  static unsigned long spi_bases[] = {
> -       0x43fa4000,
> -       0x50010000,
> +       MXC_SPI_BASE_ADDRESSES
>  };
>
> -#else
> -#error "Unsupported architecture"
> -#endif
> -
>  #define OUT    MXC_GPIO_DIRECTION_OUT
>
>  #define reg_read readl
> @@ -129,7 +48,7 @@ struct mxc_spi_slave {
>        struct spi_slave slave;
>        unsigned long   base;
>        u32             ctrl_reg;
> -#if defined(CONFIG_MX51)
> +#if defined(MXC_ECSPI)
>        u32             cfg_reg;
>  #endif
>        int             gpio;
> @@ -167,7 +86,7 @@ u32 get_cspi_div(u32 div)
>        return i;
>  }
>
> -#if defined(CONFIG_MX31) || defined(CONFIG_MX35)
> +#ifdef MXC_CSPI
>  static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs,
>                unsigned int max_hz, unsigned int mode)
>  {
> @@ -204,7 +123,7 @@ static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs,
>  }
>  #endif
>
> -#if defined(CONFIG_MX51)
> +#ifdef MXC_ECSPI
>  static s32 spi_cfg_mxc(struct mxc_spi_slave *mxcs, unsigned int cs,
>                unsigned int max_hz, unsigned int mode)
>  {
> @@ -316,7 +235,7 @@ int spi_xchg_single(struct spi_slave *slave, unsigned int bitlen,
>                MXC_CSPICTRL_BITCOUNT(bitlen - 1);
>
>        reg_write(&regs->ctrl, mxcs->ctrl_reg | MXC_CSPICTRL_EN);
> -#ifdef CONFIG_MX51
> +#ifdef MXC_ECSPI
>        reg_write(&regs->cfg, mxcs->cfg_reg);
>  #endif
>
> --
> 1.7.1
>


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