void mxs_i2c_reset(void)
{
struct mx28_i2c_regs *i2c_regs = (struct mx28_i2c_regs *)MXS_I2C0_BASE;
int ret;
ret = mx28_reset_block(&i2c_regs->hw_i2c_ctrl0_reg);
if (ret) {
printf("MXS I2C: Block reset timeout\r\n");
return;
}
writel(I2C_CTRL1_DATA_ENGINE_CMPLT_IRQ | I2C_CTRL1_NO_SLAVE_ACK_IRQ |
I2C_CTRL1_EARLY_TERM_IRQ | I2C_CTRL1_MASTER_LOSS_IRQ |
I2C_CTRL1_SLAVE_STOP_IRQ | I2C_CTRL1_SLAVE_IRQ,
&i2c_regs->hw_i2c_ctrl1_clr);
writel(I2C_QUEUECTRL_PIO_QUEUE_MODE, &i2c_regs->hw_i2c_queuectrl_set);
}
static int mxsmmc_init(struct mmc *mmc)
{
struct mxsmmc_priv *priv = (struct mxsmmc_priv *)mmc->priv;
struct mx28_ssp_regs *ssp_regs = priv->regs;
/* Reset SSP */
mx28_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
/* 8 bits word length in MMC mode */
clrsetbits_le32(&ssp_regs->hw_ssp_ctrl1,
SSP_CTRL1_SSP_MODE_MASK | SSP_CTRL1_WORD_LENGTH_MASK,
SSP_CTRL1_SSP_MODE_SD_MMC | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
SSP_CTRL1_DMA_ENABLE);
/* Set initial bit clock 400 KHz */
mx28_set_ssp_busclock(priv->id, 400);
/* Send initial 74 clock cycles (185 us @ 400 KHz)*/
writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
udelay(200);
writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_clr);
return 0;
}