diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 181 |
1 files changed, 115 insertions, 66 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index df478ae72e23..b44306b886cb 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -54,7 +54,7 @@ #define DW_MCI_DMA_THRESHOLD 16 #define DW_MCI_FREQ_MAX 200000000 /* unit: HZ */ -#define DW_MCI_FREQ_MIN 400000 /* unit: HZ */ +#define DW_MCI_FREQ_MIN 100000 /* unit: HZ */ #define IDMAC_INT_CLR (SDMMC_IDMAC_INT_AI | SDMMC_IDMAC_INT_NI | \ SDMMC_IDMAC_INT_CES | SDMMC_IDMAC_INT_DU | \ @@ -165,12 +165,14 @@ static const struct file_operations dw_mci_req_fops = { static int dw_mci_regs_show(struct seq_file *s, void *v) { - seq_printf(s, "STATUS:\t0x%08x\n", SDMMC_STATUS); - seq_printf(s, "RINTSTS:\t0x%08x\n", SDMMC_RINTSTS); - seq_printf(s, "CMD:\t0x%08x\n", SDMMC_CMD); - seq_printf(s, "CTRL:\t0x%08x\n", SDMMC_CTRL); - seq_printf(s, "INTMASK:\t0x%08x\n", SDMMC_INTMASK); - seq_printf(s, "CLKENA:\t0x%08x\n", SDMMC_CLKENA); + struct dw_mci *host = s->private; + + seq_printf(s, "STATUS:\t0x%08x\n", mci_readl(host, STATUS)); + seq_printf(s, "RINTSTS:\t0x%08x\n", mci_readl(host, RINTSTS)); + seq_printf(s, "CMD:\t0x%08x\n", mci_readl(host, CMD)); + seq_printf(s, "CTRL:\t0x%08x\n", mci_readl(host, CTRL)); + seq_printf(s, "INTMASK:\t0x%08x\n", mci_readl(host, INTMASK)); + seq_printf(s, "CLKENA:\t0x%08x\n", mci_readl(host, CLKENA)); return 0; } @@ -234,7 +236,6 @@ static void mci_send_cmd(struct dw_mci_slot *slot, u32 cmd, u32 arg); static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) { - struct mmc_data *data; struct dw_mci_slot *slot = mmc_priv(mmc); struct dw_mci *host = slot->host; u32 cmdr; @@ -289,10 +290,9 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd) if (cmd->flags & MMC_RSP_CRC) cmdr |= SDMMC_CMD_RESP_CRC; - data = cmd->data; - if (data) { + if (cmd->data) { cmdr |= SDMMC_CMD_DAT_EXP; - if (data->flags & MMC_DATA_WRITE) + if (cmd->data->flags & MMC_DATA_WRITE) cmdr |= SDMMC_CMD_DAT_WR; } @@ -335,6 +335,9 @@ static u32 dw_mci_prep_stop_abort(struct dw_mci *host, struct mmc_command *cmd) cmdr = stop->opcode | SDMMC_CMD_STOP | SDMMC_CMD_RESP_CRC | SDMMC_CMD_RESP_EXP; + if (!test_bit(DW_MMC_CARD_NO_USE_HOLD, &host->cur_slot->flags)) + cmdr |= SDMMC_CMD_USE_HOLD_REG; + return cmdr; } @@ -380,7 +383,7 @@ static void dw_mci_start_command(struct dw_mci *host, static inline void send_stop_abort(struct dw_mci *host, struct mmc_data *data) { - struct mmc_command *stop = data->stop ? data->stop : &host->stop_abort; + struct mmc_command *stop = &host->stop_abort; dw_mci_start_command(host, stop, host->stop_cmdr); } @@ -409,12 +412,13 @@ static void dw_mci_dma_cleanup(struct dw_mci *host) { struct mmc_data *data = host->data; - if (data) - if (!data->host_cookie) - dma_unmap_sg(host->dev, - data->sg, - data->sg_len, - dw_mci_get_dma_dir(data)); + if (data && data->host_cookie == COOKIE_MAPPED) { + dma_unmap_sg(host->dev, + data->sg, + data->sg_len, + dw_mci_get_dma_dir(data)); + data->host_cookie = COOKIE_UNMAPPED; + } } static void dw_mci_idmac_reset(struct dw_mci *host) @@ -612,7 +616,7 @@ static inline int dw_mci_prepare_desc64(struct dw_mci *host, return 0; err_own_bit: /* restore the descriptor chain as it's polluted */ - dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); + dev_dbg(host->dev, "descriptor is still owned by IDMAC.\n"); memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); dw_mci_idmac_init(host); return -EINVAL; @@ -688,7 +692,7 @@ static inline int dw_mci_prepare_desc32(struct dw_mci *host, return 0; err_own_bit: /* restore the descriptor chain as it's polluted */ - dev_dbg(host->dev, "desciptor is still owned by IDMAC.\n"); + dev_dbg(host->dev, "descriptor is still owned by IDMAC.\n"); memset(host->sg_cpu, 0, DESC_RING_BUF_SZ); dw_mci_idmac_init(host); return -EINVAL; @@ -845,13 +849,13 @@ static const struct dw_mci_dma_ops dw_mci_edmac_ops = { static int dw_mci_pre_dma_transfer(struct dw_mci *host, struct mmc_data *data, - bool next) + int cookie) { struct scatterlist *sg; unsigned int i, sg_len; - if (!next && data->host_cookie) - return data->host_cookie; + if (data->host_cookie == COOKIE_PRE_MAPPED) + return data->sg_len; /* * We don't do DMA on "complex" transfers, i.e. with @@ -876,15 +880,13 @@ static int dw_mci_pre_dma_transfer(struct dw_mci *host, if (sg_len == 0) return -EINVAL; - if (next) - data->host_cookie = sg_len; + data->host_cookie = cookie; return sg_len; } static void dw_mci_pre_req(struct mmc_host *mmc, - struct mmc_request *mrq, - bool is_first_req) + struct mmc_request *mrq) { struct dw_mci_slot *slot = mmc_priv(mmc); struct mmc_data *data = mrq->data; @@ -892,13 +894,12 @@ static void dw_mci_pre_req(struct mmc_host *mmc, if (!slot->host->use_dma || !data) return; - if (data->host_cookie) { - data->host_cookie = 0; - return; - } + /* This data might be unmapped at this time */ + data->host_cookie = COOKIE_UNMAPPED; - if (dw_mci_pre_dma_transfer(slot->host, mrq->data, 1) < 0) - data->host_cookie = 0; + if (dw_mci_pre_dma_transfer(slot->host, mrq->data, + COOKIE_PRE_MAPPED) < 0) + data->host_cookie = COOKIE_UNMAPPED; } static void dw_mci_post_req(struct mmc_host *mmc, @@ -911,12 +912,12 @@ static void dw_mci_post_req(struct mmc_host *mmc, if (!slot->host->use_dma || !data) return; - if (data->host_cookie) + if (data->host_cookie != COOKIE_UNMAPPED) dma_unmap_sg(slot->host->dev, data->sg, data->sg_len, dw_mci_get_dma_dir(data)); - data->host_cookie = 0; + data->host_cookie = COOKIE_UNMAPPED; } static void dw_mci_adjust_fifoth(struct dw_mci *host, struct mmc_data *data) @@ -1022,7 +1023,7 @@ static int dw_mci_submit_data_dma(struct dw_mci *host, struct mmc_data *data) if (!host->use_dma) return -ENODEV; - sg_len = dw_mci_pre_dma_transfer(host, data, 0); + sg_len = dw_mci_pre_dma_transfer(host, data, COOKIE_MAPPED); if (sg_len < 0) { host->dma_ops->stop(host); return sg_len; @@ -1175,13 +1176,24 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot, bool force_clkinit) div = (host->bus_hz != clock) ? DIV_ROUND_UP(div, 2) : 0; - if (clock != slot->__clk_old || force_clkinit) + if ((clock != slot->__clk_old && + !test_bit(DW_MMC_CARD_NEEDS_POLL, &slot->flags)) || + force_clkinit) { dev_info(&slot->mmc->class_dev, "Bus speed (slot %d) = %dHz (slot req %dHz, actual %dHZ div = %d)\n", slot->id, host->bus_hz, clock, div ? ((host->bus_hz / div) >> 1) : host->bus_hz, div); + /* + * If card is polling, display the message only + * one time at boot time. + */ + if (slot->mmc->caps & MMC_CAP_NEEDS_POLL && + slot->mmc->f_min == clock) + set_bit(DW_MMC_CARD_NEEDS_POLL, &slot->flags); + } + /* disable clock */ mci_writel(host, CLKENA, 0); mci_writel(host, CLKSRC, 0); @@ -1273,10 +1285,7 @@ static void __dw_mci_start_request(struct dw_mci *host, spin_unlock_irqrestore(&host->irq_lock, irqflags); } - if (mrq->stop) - host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop); - else - host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); + host->stop_cmdr = dw_mci_prep_stop_abort(host, cmd); } static void dw_mci_start_request(struct dw_mci *host, @@ -1527,22 +1536,34 @@ static int dw_mci_get_cd(struct mmc_host *mmc) int gpio_cd = mmc_gpio_get_cd(mmc); /* Use platform get_cd function, else try onboard card detect */ - if ((mmc->caps & MMC_CAP_NEEDS_POLL) || !mmc_card_is_removable(mmc)) + if (((mmc->caps & MMC_CAP_NEEDS_POLL) + || !mmc_card_is_removable(mmc))) { present = 1; - else if (gpio_cd >= 0) + + if (!test_bit(DW_MMC_CARD_PRESENT, &slot->flags)) { + if (mmc->caps & MMC_CAP_NEEDS_POLL) { + dev_info(&mmc->class_dev, + "card is polling.\n"); + } else { + dev_info(&mmc->class_dev, + "card is non-removable.\n"); + } + set_bit(DW_MMC_CARD_PRESENT, &slot->flags); + } + + return present; + } else if (gpio_cd >= 0) present = gpio_cd; else present = (mci_readl(slot->host, CDETECT) & (1 << slot->id)) == 0 ? 1 : 0; spin_lock_bh(&host->lock); - if (present) { - set_bit(DW_MMC_CARD_PRESENT, &slot->flags); + if (present && !test_and_set_bit(DW_MMC_CARD_PRESENT, &slot->flags)) dev_dbg(&mmc->class_dev, "card is present\n"); - } else { - clear_bit(DW_MMC_CARD_PRESENT, &slot->flags); + else if (!present && + !test_and_clear_bit(DW_MMC_CARD_PRESENT, &slot->flags)) dev_dbg(&mmc->class_dev, "card is not present\n"); - } spin_unlock_bh(&host->lock); return present; @@ -1889,8 +1910,7 @@ static void dw_mci_tasklet_func(unsigned long priv) if (test_and_clear_bit(EVENT_DATA_ERROR, &host->pending_events)) { dw_mci_stop_dma(host); - if (data->stop || - !(host->data_status & (SDMMC_INT_DRTO | + if (!(host->data_status & (SDMMC_INT_DRTO | SDMMC_INT_EBE))) send_stop_abort(host, data); state = STATE_DATA_ERROR; @@ -1926,8 +1946,7 @@ static void dw_mci_tasklet_func(unsigned long priv) if (test_and_clear_bit(EVENT_DATA_ERROR, &host->pending_events)) { dw_mci_stop_dma(host); - if (data->stop || - !(host->data_status & (SDMMC_INT_DRTO | + if (!(host->data_status & (SDMMC_INT_DRTO | SDMMC_INT_EBE))) send_stop_abort(host, data); state = STATE_DATA_ERROR; @@ -2003,7 +2022,7 @@ static void dw_mci_tasklet_func(unsigned long priv) host->cmd = NULL; host->data = NULL; - if (mrq->stop) + if (!mrq->sbc && mrq->stop) dw_mci_command_complete(host, mrq->stop); else host->cmd_status = 0; @@ -2615,6 +2634,8 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) mmc->f_min = DW_MCI_FREQ_MIN; mmc->f_max = DW_MCI_FREQ_MAX; } else { + dev_info(host->dev, + "'clock-freq-min-max' property was deprecated.\n"); mmc->f_min = freq[0]; mmc->f_max = freq[1]; } @@ -3267,26 +3288,46 @@ EXPORT_SYMBOL(dw_mci_remove); -#ifdef CONFIG_PM_SLEEP -/* - * TODO: we should probably disable the clock to the card in the suspend path. - */ -int dw_mci_suspend(struct dw_mci *host) +#ifdef CONFIG_PM +int dw_mci_runtime_suspend(struct device *dev) { + struct dw_mci *host = dev_get_drvdata(dev); + if (host->use_dma && host->dma_ops->exit) host->dma_ops->exit(host); + clk_disable_unprepare(host->ciu_clk); + + if (host->cur_slot && + (mmc_can_gpio_cd(host->cur_slot->mmc) || + !mmc_card_is_removable(host->cur_slot->mmc))) + clk_disable_unprepare(host->biu_clk); + return 0; } -EXPORT_SYMBOL(dw_mci_suspend); +EXPORT_SYMBOL(dw_mci_runtime_suspend); -int dw_mci_resume(struct dw_mci *host) +int dw_mci_runtime_resume(struct device *dev) { - int i, ret; + int i, ret = 0; + struct dw_mci *host = dev_get_drvdata(dev); + + if (host->cur_slot && + (mmc_can_gpio_cd(host->cur_slot->mmc) || + !mmc_card_is_removable(host->cur_slot->mmc))) { + ret = clk_prepare_enable(host->biu_clk); + if (ret) + return ret; + } + + ret = clk_prepare_enable(host->ciu_clk); + if (ret) + goto err; if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { + clk_disable_unprepare(host->ciu_clk); ret = -ENODEV; - return ret; + goto err; } if (host->use_dma && host->dma_ops->init) @@ -3296,8 +3337,8 @@ int dw_mci_resume(struct dw_mci *host) * Restore the initial value at FIFOTH register * And Invalidate the prev_blksz with zero */ - mci_writel(host, FIFOTH, host->fifoth_val); - host->prev_blksz = 0; + mci_writel(host, FIFOTH, host->fifoth_val); + host->prev_blksz = 0; /* Put in max timeout */ mci_writel(host, TMOUT, 0xFFFFFFFF); @@ -3323,9 +3364,17 @@ int dw_mci_resume(struct dw_mci *host) dw_mci_enable_cd(host); return 0; + +err: + if (host->cur_slot && + (mmc_can_gpio_cd(host->cur_slot->mmc) || + !mmc_card_is_removable(host->cur_slot->mmc))) + clk_disable_unprepare(host->biu_clk); + + return ret; } -EXPORT_SYMBOL(dw_mci_resume); -#endif /* CONFIG_PM_SLEEP */ +EXPORT_SYMBOL(dw_mci_runtime_resume); +#endif /* CONFIG_PM */ static int __init dw_mci_init(void) { |