C++ (Cpp) ESPI_CSMODE_PM Exemples

Exemple #1

Fichier : fsl_espi.c Projet : AeroGirl/u-boot-kern3.2

int spi_claim_bus(struct spi_slave *slave)
{
	struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
	ccsr_espi_t *espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
	unsigned char pm = fsl->pm;
	unsigned int cs = slave->cs;
	unsigned int mode =  fsl->mode;
	unsigned int div16 = fsl->div16;
	int i;

	debug("%s: bus:%i cs:%i\n", __func__, slave->bus, cs);

	/* Enable eSPI interface */
	out_be32(&espi->mode, ESPI_MODE_RXTHR(3)
			| ESPI_MODE_TXTHR(4) | ESPI_MODE_EN);

	out_be32(&espi->event, 0xffffffff); /* Clear all eSPI events */
	out_be32(&espi->mask, 0x00000000); /* Mask  all eSPI interrupts */

	/* Init CS mode interface */
	for (i = 0; i < ESPI_MAX_CS_NUM; i++)
		out_be32(&espi->csmode[i], ESPI_CSMODE_INIT_VAL);

	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs]) &
		~(ESPI_CSMODE_PM(0xF) | ESPI_CSMODE_DIV16
		| ESPI_CSMODE_CI_INACTIVEHIGH | ESPI_CSMODE_CP_BEGIN_EDGCLK
		| ESPI_CSMODE_REV_MSB_FIRST | ESPI_CSMODE_LEN(0xF)));

	/* Set eSPI BRG clock source */
	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
		| ESPI_CSMODE_PM(pm) | div16);

	/* Set eSPI mode */
	if (mode & SPI_CPHA)
		out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
			| ESPI_CSMODE_CP_BEGIN_EDGCLK);
	if (mode & SPI_CPOL)
		out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
			| ESPI_CSMODE_CI_INACTIVEHIGH);

	/* Character bit order: msb first */
	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
		| ESPI_CSMODE_REV_MSB_FIRST);

	/* Character length in bits, between 0x3~0xf, i.e. 4bits~16bits */
	out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
		| ESPI_CSMODE_LEN(7));

	return 0;
}

Exemple #2

Fichier : cpu_peri_spi.c Projet : djyos/djyos

// =============================================================================
// 功能：SPI控制寄存器参数配置，如PHA和CPOL、时钟等，根据各种寄存器而异
// 参数：tpSPI,SPI控制器基址
//       ptr,参数指针
// 返回：无
// =============================================================================
void __SPI_Config(volatile tagSpiReg *tpSpi,u8 cs,tagSpiConfig *tagpInConfig)
{
    u8 pm;
    u32 mode,div16;

    mode = tagpInConfig->Mode;
    pm = __spi_clk_cal(tagpInConfig->Freq,&div16);

    /* Enable eSPI interface */
    tpSpi->mode = ESPI_MODE_RXTHR(3) | ESPI_MODE_TXTHR(4) | ESPI_MODE_EN;

    tpSpi->event  = 0xffffffff; /* Clear all eSPI events */
    tpSpi->mask  = 0x00000000; /* Mask  all eSPI interrupts */

    /* Init CS0,1,2,3 mode interface */
    if(cs < 4)
    {
        tpSpi->csmode[cs] = ESPI_CSMODE_INIT_VAL;

        tpSpi->csmode[cs] = tpSpi->csmode[cs] &
            ~(ESPI_CSMODE_PM(0xF) | ESPI_CSMODE_DIV16
            | ESPI_CSMODE_CI_INACTIVEHIGH | ESPI_CSMODE_CP_BEGIN_EDGCLK
            | ESPI_CSMODE_REV_MSB_FIRST | ESPI_CSMODE_LEN(0xF));

        /* Set eSPI BRG clock source */
        tpSpi->csmode[cs] = tpSpi->csmode[cs] | ESPI_CSMODE_PM(pm) | div16;

        /* Set eSPI mode */
        if (mode & SPI_CPHA)
            tpSpi->csmode[cs] = tpSpi->csmode[cs] | ESPI_CSMODE_CP_BEGIN_EDGCLK;
        if (mode & SPI_CPOL)
            tpSpi->csmode[cs] = tpSpi->csmode[cs] | ESPI_CSMODE_CI_INACTIVEHIGH;

        /* Character bit order: msb/lsb first */
        if(tagpInConfig->ShiftDir == SPI_SHIFT_MSB)
            tpSpi->csmode[cs] = tpSpi->csmode[cs] | ESPI_CSMODE_REV_MSB_FIRST;
        else
            tpSpi->csmode[cs] = tpSpi->csmode[cs] & (~ESPI_CSMODE_REV_MSB_FIRST);

        /* Character length in bits, between 0x3~0xf, i.e. 4bits~16bits */
        tpSpi->csmode[cs] = tpSpi->csmode[cs] | ESPI_CSMODE_LEN(7);
    }
}