diff options
Diffstat (limited to 'drivers/mmc/mxsmmc.c')
| -rw-r--r-- | drivers/mmc/mxsmmc.c | 102 |
1 files changed, 61 insertions, 41 deletions
diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c index 024df59..a72f66c 100644 --- a/drivers/mmc/mxsmmc.c +++ b/drivers/mmc/mxsmmc.c @@ -47,16 +47,31 @@ struct mxsmmc_priv { int id; struct mxs_ssp_regs *regs; - uint32_t clkseq_bypass; - uint32_t *clkctrl_ssp; uint32_t buswidth; int (*mmc_is_wp)(int); + int (*mmc_cd)(int); struct mxs_dma_desc *desc; }; +#if defined(CONFIG_MX23) +static const unsigned int mxsmmc_id_offset = 1; +#elif defined(CONFIG_MX28) +static const unsigned int mxsmmc_id_offset = 0; +#endif + #define MXSMMC_MAX_TIMEOUT 10000 #define MXSMMC_SMALL_TRANSFER 512 +static int mxsmmc_cd(struct mxsmmc_priv *priv) +{ + struct mxs_ssp_regs *ssp_regs = priv->regs; + + if (priv->mmc_cd) + return priv->mmc_cd(priv->id); + + return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT); +} + static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data) { struct mxs_ssp_regs *ssp_regs = priv->regs; @@ -122,7 +137,7 @@ static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data) priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM | (data_count << MXS_DMA_DESC_BYTES_OFFSET); - dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id; + dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id + mxsmmc_id_offset; mxs_dma_desc_append(dmach, priv->desc); if (mxs_dma_go(dmach)) { bounce_buffer_stop(&bbstate); @@ -168,7 +183,7 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) } /* See if card is present */ - if (readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT) { + if (!mxsmmc_cd(priv)) { printf("MMC%d: No card detected!\n", mmc->block_dev.dev); return NO_CARD_ERR; } @@ -213,14 +228,25 @@ mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) } ctrl0 |= SSP_CTRL0_DATA_XFER; + + reg = data->blocksize * data->blocks; +#if defined(CONFIG_MX23) + ctrl0 |= reg & SSP_CTRL0_XFER_COUNT_MASK; + + clrsetbits_le32(&ssp_regs->hw_ssp_cmd0, + SSP_CMD0_BLOCK_SIZE_MASK | SSP_CMD0_BLOCK_COUNT_MASK, + ((data->blocks - 1) << SSP_CMD0_BLOCK_COUNT_OFFSET) | + ((ffs(data->blocksize) - 1) << + SSP_CMD0_BLOCK_SIZE_OFFSET)); +#elif defined(CONFIG_MX28) + writel(reg, &ssp_regs->hw_ssp_xfer_size); + reg = ((data->blocks - 1) << SSP_BLOCK_SIZE_BLOCK_COUNT_OFFSET) | ((ffs(data->blocksize) - 1) << SSP_BLOCK_SIZE_BLOCK_SIZE_OFFSET); writel(reg, &ssp_regs->hw_ssp_block_size); - - reg = data->blocksize * data->blocks; - writel(reg, &ssp_regs->hw_ssp_xfer_size); +#endif } /* Kick off the command */ @@ -306,7 +332,7 @@ static void mxsmmc_set_ios(struct mmc *mmc) /* Set the clock speed */ if (mmc->clock) - mx28_set_ssp_busclock(priv->id, mmc->clock / 1000); + mxs_set_ssp_busclock(priv->id, mmc->clock / 1000); switch (mmc->bus_width) { case 1: @@ -336,14 +362,20 @@ static int mxsmmc_init(struct mmc *mmc) /* Reset SSP */ mxs_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_DMA_ENABLE, - SSP_CTRL1_SSP_MODE_SD_MMC | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS); + /* Reconfigure the SSP block for MMC operation */ + writel(SSP_CTRL1_SSP_MODE_SD_MMC | + SSP_CTRL1_WORD_LENGTH_EIGHT_BITS | + SSP_CTRL1_DMA_ENABLE | + SSP_CTRL1_POLARITY | + SSP_CTRL1_RECV_TIMEOUT_IRQ_EN | + SSP_CTRL1_DATA_CRC_IRQ_EN | + SSP_CTRL1_DATA_TIMEOUT_IRQ_EN | + SSP_CTRL1_RESP_TIMEOUT_IRQ_EN | + SSP_CTRL1_RESP_ERR_IRQ_EN, + &ssp_regs->hw_ssp_ctrl1_set); /* Set initial bit clock 400 KHz */ - mx28_set_ssp_busclock(priv->id, 400); + mxs_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); @@ -353,13 +385,21 @@ static int mxsmmc_init(struct mmc *mmc) return 0; } -int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int)) +int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int)) { - struct mxs_clkctrl_regs *clkctrl_regs = - (struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE; struct mmc *mmc = NULL; struct mxsmmc_priv *priv = NULL; int ret; +#if defined(CONFIG_MX23) + const unsigned int mxsmmc_max_id = 2; + const unsigned int mxsmmc_clk_id = 0; +#elif defined(CONFIG_MX28) + const unsigned int mxsmmc_max_id = 4; + const unsigned int mxsmmc_clk_id = id; +#endif + + if (id >= mxsmmc_max_id) + return -ENODEV; mmc = malloc(sizeof(struct mmc)); if (!mmc) @@ -378,34 +418,14 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int)) return -ENOMEM; } - ret = mxs_dma_init_channel(id); + ret = mxs_dma_init_channel(id + mxsmmc_id_offset); if (ret) return ret; priv->mmc_is_wp = wp; + priv->mmc_cd = cd; priv->id = id; - switch (id) { - case 0: - priv->regs = (struct mxs_ssp_regs *)MXS_SSP0_BASE; - priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP0; - priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp0; - break; - case 1: - priv->regs = (struct mxs_ssp_regs *)MXS_SSP1_BASE; - priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP1; - priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp1; - break; - case 2: - priv->regs = (struct mxs_ssp_regs *)MXS_SSP2_BASE; - priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP2; - priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp2; - break; - case 3: - priv->regs = (struct mxs_ssp_regs *)MXS_SSP3_BASE; - priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP3; - priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp3; - break; - } + priv->regs = mxs_ssp_regs_by_bus(id); sprintf(mmc->name, "MXS MMC"); mmc->send_cmd = mxsmmc_send_cmd; @@ -426,7 +446,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int)) * CLOCK_RATE could be any integer from 0 to 255. */ mmc->f_min = 400000; - mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + id) * 1000 / 2; + mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id) * 1000 / 2; mmc->b_max = 0x20; mmc_register(mmc); |