diff options
Diffstat (limited to 'drivers/mmc/host/mmci.c')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index e967cca7a16f..b790c3c3c8f9 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -273,6 +273,7 @@ static struct variant_data variant_stm32_sdmmc = { .datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN, .stm32_idmabsize_mask = GENMASK(12, 5), .stm32_idmabsize_align = BIT(5), + .supports_sdio_irq = true, .busy_timeout = true, .busy_detect = true, .busy_detect_flag = MCI_STM32_BUSYD0, @@ -300,6 +301,7 @@ static struct variant_data variant_stm32_sdmmcv2 = { .datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN, .stm32_idmabsize_mask = GENMASK(16, 5), .stm32_idmabsize_align = BIT(5), + .supports_sdio_irq = true, .dma_lli = true, .busy_timeout = true, .busy_detect = true, @@ -328,6 +330,7 @@ static struct variant_data variant_stm32_sdmmcv3 = { .datactrl_mask_sdio = MCI_DPSM_ST_SDIOEN, .stm32_idmabsize_mask = GENMASK(16, 6), .stm32_idmabsize_align = BIT(6), + .supports_sdio_irq = true, .dma_lli = true, .busy_timeout = true, .busy_detect = true, @@ -421,8 +424,9 @@ void mmci_write_pwrreg(struct mmci_host *host, u32 pwr) */ static void mmci_write_datactrlreg(struct mmci_host *host, u32 datactrl) { - /* Keep busy mode in DPSM if enabled */ - datactrl |= host->datactrl_reg & host->variant->busy_dpsm_flag; + /* Keep busy mode in DPSM and SDIO mask if enabled */ + datactrl |= host->datactrl_reg & (host->variant->busy_dpsm_flag | + host->variant->datactrl_mask_sdio); if (host->datactrl_reg != datactrl) { host->datactrl_reg = datactrl; @@ -1762,6 +1766,25 @@ static irqreturn_t mmci_pio_irq(int irq, void *dev_id) return IRQ_HANDLED; } +static void mmci_write_sdio_irq_bit(struct mmci_host *host, int enable) +{ + void __iomem *base = host->base; + u32 mask = readl_relaxed(base + MMCIMASK0); + + if (enable) + writel_relaxed(mask | MCI_ST_SDIOITMASK, base + MMCIMASK0); + else + writel_relaxed(mask & ~MCI_ST_SDIOITMASK, base + MMCIMASK0); +} + +static void mmci_signal_sdio_irq(struct mmci_host *host, u32 status) +{ + if (status & MCI_ST_SDIOIT) { + mmci_write_sdio_irq_bit(host, 0); + sdio_signal_irq(host->mmc); + } +} + /* * Handle completion of command and data transfers. */ @@ -1806,6 +1829,9 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) mmci_data_irq(host, host->data, status); } + if (host->variant->supports_sdio_irq) + mmci_signal_sdio_irq(host, status); + /* * Busy detection has been handled by mmci_cmd_irq() above. * Clear the status bit to prevent polling in IRQ context. @@ -2042,6 +2068,35 @@ static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) return ret; } +static void mmci_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct mmci_host *host = mmc_priv(mmc); + unsigned long flags; + + if (enable) + /* Keep the SDIO mode bit if SDIO irqs are enabled */ + pm_runtime_get_sync(mmc_dev(mmc)); + + spin_lock_irqsave(&host->lock, flags); + mmci_write_sdio_irq_bit(host, enable); + spin_unlock_irqrestore(&host->lock, flags); + + if (!enable) { + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); + } +} + +static void mmci_ack_sdio_irq(struct mmc_host *mmc) +{ + struct mmci_host *host = mmc_priv(mmc); + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + mmci_write_sdio_irq_bit(host, 1); + spin_unlock_irqrestore(&host->lock, flags); +} + static struct mmc_host_ops mmci_ops = { .request = mmci_request, .pre_req = mmci_pre_request, @@ -2317,6 +2372,16 @@ static int mmci_probe(struct amba_device *dev, mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY; } + if (variant->supports_sdio_irq && host->mmc->caps & MMC_CAP_SDIO_IRQ) { + mmc->caps2 |= MMC_CAP2_SDIO_IRQ_NOTHREAD; + + mmci_ops.enable_sdio_irq = mmci_enable_sdio_irq; + mmci_ops.ack_sdio_irq = mmci_ack_sdio_irq; + + mmci_write_datactrlreg(host, + host->variant->datactrl_mask_sdio); + } + /* Variants with mandatory busy timeout in HW needs R1B responses. */ if (variant->busy_timeout) mmc->caps |= MMC_CAP_NEED_RSP_BUSY; |