diff options
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r-- | drivers/mmc/host/atmel-mci.c | 6 | ||||
-rw-r--r-- | drivers/mmc/host/bfin_sdh.c | 7 | ||||
-rw-r--r-- | drivers/mmc/host/dw_mmc.c | 85 | ||||
-rw-r--r-- | drivers/mmc/host/mxs-mmc.c | 14 | ||||
-rw-r--r-- | drivers/mmc/host/omap.c | 14 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-esdhc.h | 6 |
6 files changed, 72 insertions, 60 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index 322412cec4e..a53c7c478e0 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -81,6 +81,7 @@ struct atmel_mci_caps { bool has_bad_data_ordering; bool need_reset_after_xfer; bool need_blksz_mul_4; + bool need_notbusy_for_read_ops; }; struct atmel_mci_dma { @@ -1625,7 +1626,8 @@ static void atmci_tasklet_func(unsigned long priv) __func__); atmci_set_completed(host, EVENT_XFER_COMPLETE); - if (host->data->flags & MMC_DATA_WRITE) { + if (host->caps.need_notbusy_for_read_ops || + (host->data->flags & MMC_DATA_WRITE)) { atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); state = STATE_WAITING_NOTBUSY; } else if (host->mrq->stop) { @@ -2218,6 +2220,7 @@ static void __init atmci_get_cap(struct atmel_mci *host) host->caps.has_bad_data_ordering = 1; host->caps.need_reset_after_xfer = 1; host->caps.need_blksz_mul_4 = 1; + host->caps.need_notbusy_for_read_ops = 0; /* keep only major version number */ switch (version & 0xf00) { @@ -2238,6 +2241,7 @@ static void __init atmci_get_cap(struct atmel_mci *host) case 0x200: host->caps.has_rwproof = 1; host->caps.need_blksz_mul_4 = 0; + host->caps.need_notbusy_for_read_ops = 1; case 0x100: host->caps.has_bad_data_ordering = 0; host->caps.need_reset_after_xfer = 0; diff --git a/drivers/mmc/host/bfin_sdh.c b/drivers/mmc/host/bfin_sdh.c index 03666174ca4..a17dd7363ce 100644 --- a/drivers/mmc/host/bfin_sdh.c +++ b/drivers/mmc/host/bfin_sdh.c @@ -49,13 +49,6 @@ #define bfin_write_SDH_CFG bfin_write_RSI_CFG #endif -struct dma_desc_array { - unsigned long start_addr; - unsigned short cfg; - unsigned short x_count; - short x_modify; -} __packed; - struct sdh_host { struct mmc_host *mmc; spinlock_t lock; diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 72dc3cde646..af40d227bec 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -627,6 +627,7 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot) { struct dw_mci *host = slot->host; u32 div; + u32 clk_en_a; if (slot->clock != host->current_speed) { div = host->bus_hz / slot->clock; @@ -659,9 +660,11 @@ static void dw_mci_setup_bus(struct dw_mci_slot *slot) mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | SDMMC_CMD_PRV_DAT_WAIT, 0); - /* enable clock */ - mci_writel(host, CLKENA, ((SDMMC_CLKEN_ENABLE | - SDMMC_CLKEN_LOW_PWR) << slot->id)); + /* enable clock; only low power if no SDIO */ + clk_en_a = SDMMC_CLKEN_ENABLE << slot->id; + if (!(mci_readl(host, INTMASK) & SDMMC_INT_SDIO(slot->id))) + clk_en_a |= SDMMC_CLKEN_LOW_PWR << slot->id; + mci_writel(host, CLKENA, clk_en_a); /* inform CIU */ mci_send_cmd(slot, @@ -862,6 +865,30 @@ static int dw_mci_get_cd(struct mmc_host *mmc) return present; } +/* + * Disable lower power mode. + * + * Low power mode will stop the card clock when idle. According to the + * description of the CLKENA register we should disable low power mode + * for SDIO cards if we need SDIO interrupts to work. + * + * This function is fast if low power mode is already disabled. + */ +static void dw_mci_disable_low_power(struct dw_mci_slot *slot) +{ + struct dw_mci *host = slot->host; + u32 clk_en_a; + const u32 clken_low_pwr = SDMMC_CLKEN_LOW_PWR << slot->id; + + clk_en_a = mci_readl(host, CLKENA); + + if (clk_en_a & clken_low_pwr) { + mci_writel(host, CLKENA, clk_en_a & ~clken_low_pwr); + mci_send_cmd(slot, SDMMC_CMD_UPD_CLK | + SDMMC_CMD_PRV_DAT_WAIT, 0); + } +} + static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) { struct dw_mci_slot *slot = mmc_priv(mmc); @@ -871,6 +898,14 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb) /* Enable/disable Slot Specific SDIO interrupt */ int_mask = mci_readl(host, INTMASK); if (enb) { + /* + * Turn off low power mode if it was enabled. This is a bit of + * a heavy operation and we disable / enable IRQs a lot, so + * we'll leave low power mode disabled and it will get + * re-enabled again in dw_mci_setup_bus(). + */ + dw_mci_disable_low_power(slot); + mci_writel(host, INTMASK, (int_mask | SDMMC_INT_SDIO(slot->id))); } else { @@ -1429,22 +1464,10 @@ static void dw_mci_read_data_pio(struct dw_mci *host) nbytes += len; remain -= len; } while (remain); - sg_miter->consumed = offset; + sg_miter->consumed = offset; status = mci_readl(host, MINTSTS); mci_writel(host, RINTSTS, SDMMC_INT_RXDR); - if (status & DW_MCI_DATA_ERROR_FLAGS) { - host->data_status = status; - data->bytes_xfered += nbytes; - sg_miter_stop(sg_miter); - host->sg = NULL; - smp_wmb(); - - set_bit(EVENT_DATA_ERROR, &host->pending_events); - - tasklet_schedule(&host->tasklet); - return; - } } while (status & SDMMC_INT_RXDR); /*if the RXDR is ready read again*/ data->bytes_xfered += nbytes; @@ -1497,23 +1520,10 @@ static void dw_mci_write_data_pio(struct dw_mci *host) nbytes += len; remain -= len; } while (remain); - sg_miter->consumed = offset; + sg_miter->consumed = offset; status = mci_readl(host, MINTSTS); mci_writel(host, RINTSTS, SDMMC_INT_TXDR); - if (status & DW_MCI_DATA_ERROR_FLAGS) { - host->data_status = status; - data->bytes_xfered += nbytes; - sg_miter_stop(sg_miter); - host->sg = NULL; - - smp_wmb(); - - set_bit(EVENT_DATA_ERROR, &host->pending_events); - - tasklet_schedule(&host->tasklet); - return; - } } while (status & SDMMC_INT_TXDR); /* if TXDR write again */ data->bytes_xfered += nbytes; @@ -1547,12 +1557,11 @@ static void dw_mci_cmd_interrupt(struct dw_mci *host, u32 status) static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) { struct dw_mci *host = dev_id; - u32 status, pending; + u32 pending; unsigned int pass_count = 0; int i; do { - status = mci_readl(host, RINTSTS); pending = mci_readl(host, MINTSTS); /* read-only mask reg */ /* @@ -1570,7 +1579,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & DW_MCI_CMD_ERROR_FLAGS) { mci_writel(host, RINTSTS, DW_MCI_CMD_ERROR_FLAGS); - host->cmd_status = status; + host->cmd_status = pending; smp_wmb(); set_bit(EVENT_CMD_COMPLETE, &host->pending_events); } @@ -1578,18 +1587,16 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & DW_MCI_DATA_ERROR_FLAGS) { /* if there is an error report DATA_ERROR */ mci_writel(host, RINTSTS, DW_MCI_DATA_ERROR_FLAGS); - host->data_status = status; + host->data_status = pending; smp_wmb(); set_bit(EVENT_DATA_ERROR, &host->pending_events); - if (!(pending & (SDMMC_INT_DTO | SDMMC_INT_DCRC | - SDMMC_INT_SBE | SDMMC_INT_EBE))) - tasklet_schedule(&host->tasklet); + tasklet_schedule(&host->tasklet); } if (pending & SDMMC_INT_DATA_OVER) { mci_writel(host, RINTSTS, SDMMC_INT_DATA_OVER); if (!host->data_status) - host->data_status = status; + host->data_status = pending; smp_wmb(); if (host->dir_status == DW_MCI_RECV_STATUS) { if (host->sg != NULL) @@ -1613,7 +1620,7 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) if (pending & SDMMC_INT_CMD_DONE) { mci_writel(host, RINTSTS, SDMMC_INT_CMD_DONE); - dw_mci_cmd_interrupt(host, status); + dw_mci_cmd_interrupt(host, pending); } if (pending & SDMMC_INT_CD) { diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c index a51f9309ffb..ad3fcea1269 100644 --- a/drivers/mmc/host/mxs-mmc.c +++ b/drivers/mmc/host/mxs-mmc.c @@ -285,11 +285,11 @@ static irqreturn_t mxs_mmc_irq_handler(int irq, void *dev_id) writel(stat & MXS_MMC_IRQ_BITS, host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_CLR); + spin_unlock(&host->lock); + if ((stat & BM_SSP_CTRL1_SDIO_IRQ) && (stat & BM_SSP_CTRL1_SDIO_IRQ_EN)) mmc_signal_sdio_irq(host->mmc); - spin_unlock(&host->lock); - if (stat & BM_SSP_CTRL1_RESP_TIMEOUT_IRQ) cmd->error = -ETIMEDOUT; else if (stat & BM_SSP_CTRL1_RESP_ERR_IRQ) @@ -644,11 +644,6 @@ static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_SET); writel(BM_SSP_CTRL1_SDIO_IRQ_EN, host->base + HW_SSP_CTRL1(host) + STMP_OFFSET_REG_SET); - - if (readl(host->base + HW_SSP_STATUS(host)) & - BM_SSP_STATUS_SDIO_IRQ) - mmc_signal_sdio_irq(host->mmc); - } else { writel(BM_SSP_CTRL0_SDIO_IRQ_CHECK, host->base + HW_SSP_CTRL0 + STMP_OFFSET_REG_CLR); @@ -657,6 +652,11 @@ static void mxs_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) } spin_unlock_irqrestore(&host->lock, flags); + + if (enable && readl(host->base + HW_SSP_STATUS(host)) & + BM_SSP_STATUS_SDIO_IRQ) + mmc_signal_sdio_irq(host->mmc); + } static const struct mmc_host_ops mxs_mmc_ops = { diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index 50e08f03aa6..a5999a74496 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -668,7 +668,7 @@ mmc_omap_clk_timer(unsigned long data) static void mmc_omap_xfer_data(struct mmc_omap_host *host, int write) { - int n; + int n, nwords; if (host->buffer_bytes_left == 0) { host->sg_idx++; @@ -678,15 +678,23 @@ mmc_omap_xfer_data(struct mmc_omap_host *host, int write) n = 64; if (n > host->buffer_bytes_left) n = host->buffer_bytes_left; + + nwords = n / 2; + nwords += n & 1; /* handle odd number of bytes to transfer */ + host->buffer_bytes_left -= n; host->total_bytes_left -= n; host->data->bytes_xfered += n; if (write) { - __raw_writesw(host->virt_base + OMAP_MMC_REG(host, DATA), host->buffer, n); + __raw_writesw(host->virt_base + OMAP_MMC_REG(host, DATA), + host->buffer, nwords); } else { - __raw_readsw(host->virt_base + OMAP_MMC_REG(host, DATA), host->buffer, n); + __raw_readsw(host->virt_base + OMAP_MMC_REG(host, DATA), + host->buffer, nwords); } + + host->buffer += nwords; } static inline void mmc_omap_report_irq(u16 status) diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h index b97b2f5dafd..d25f9ab9a54 100644 --- a/drivers/mmc/host/sdhci-esdhc.h +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -48,14 +48,14 @@ static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock) int div = 1; u32 temp; + if (clock == 0) + goto out; + temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL); temp &= ~(ESDHC_CLOCK_IPGEN | ESDHC_CLOCK_HCKEN | ESDHC_CLOCK_PEREN | ESDHC_CLOCK_MASK); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); - if (clock == 0) - goto out; - while (host->max_clk / pre_div / 16 > clock && pre_div < 256) pre_div *= 2; |