diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mxcmmc.c | 70 |
1 files changed, 59 insertions, 11 deletions
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c index 44a53ee..51e880c 100644 --- a/drivers/mmc/host/mxcmmc.c +++ b/drivers/mmc/host/mxcmmc.c @@ -119,6 +119,7 @@ struct mxcmci_host { int detect_irq; int dma; int do_dma; + int use_sdio; unsigned int power_mode; struct imxmmc_platform_data *pdata; @@ -138,6 +139,7 @@ struct mxcmci_host { int clock; struct work_struct datawork; + spinlock_t lock; }; static void mxcmci_set_clk_rate(struct mxcmci_host *host, unsigned int clk_ios); @@ -226,6 +228,9 @@ static int mxcmci_setup_data(struct mxcmci_host *host, struct mmc_data *data) static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, unsigned int cmdat) { + u32 int_cntr; + unsigned long flags; + WARN_ON(host->cmd != NULL); host->cmd = cmd; @@ -249,12 +254,16 @@ static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, return -EINVAL; } + int_cntr = INT_END_CMD_RES_EN; + if (mxcmci_use_dma(host)) - writel(INT_READ_OP_EN | INT_WRITE_OP_DONE_EN | - INT_END_CMD_RES_EN, - host->base + MMC_REG_INT_CNTR); - else - writel(INT_END_CMD_RES_EN, host->base + MMC_REG_INT_CNTR); + int_cntr |= INT_READ_OP_EN | INT_WRITE_OP_DONE_EN; + + spin_lock_irqsave(&host->lock, flags); + if (host->use_sdio) + int_cntr |= INT_SDIO_IRQ_EN; + writel(int_cntr, host->base + MMC_REG_INT_CNTR); + spin_unlock_irqrestore(&host->lock, flags); writew(cmd->opcode, host->base + MMC_REG_CMD); writel(cmd->arg, host->base + MMC_REG_ARG); @@ -266,7 +275,14 @@ static int mxcmci_start_cmd(struct mxcmci_host *host, struct mmc_command *cmd, static void mxcmci_finish_request(struct mxcmci_host *host, struct mmc_request *req) { - writel(0, host->base + MMC_REG_INT_CNTR); + u32 int_cntr = 0; + unsigned long flags; + + spin_lock_irqsave(&host->lock, flags); + if (host->use_sdio) + int_cntr |= INT_SDIO_IRQ_EN; + writel(int_cntr, host->base + MMC_REG_INT_CNTR); + spin_unlock_irqrestore(&host->lock, flags); host->req = NULL; host->cmd = NULL; @@ -532,15 +548,27 @@ static void mxcmci_cmd_done(struct mxcmci_host *host, unsigned int stat) static irqreturn_t mxcmci_irq(int irq, void *devid) { struct mxcmci_host *host = devid; + unsigned long flags; + bool sdio_irq; u32 stat; stat = readl(host->base + MMC_REG_STATUS); - writel(stat, host->base + MMC_REG_STATUS); + writel(stat & ~STATUS_SDIO_INT_ACTIVE, host->base + MMC_REG_STATUS); dev_dbg(mmc_dev(host->mmc), "%s: 0x%08x\n", __func__, stat); + spin_lock_irqsave(&host->lock, flags); + sdio_irq = (stat & STATUS_SDIO_INT_ACTIVE) && host->use_sdio; + spin_unlock_irqrestore(&host->lock, flags); + + if (sdio_irq) { + writel(STATUS_SDIO_INT_ACTIVE, host->base + MMC_REG_STATUS); + mmc_signal_sdio_irq(host->mmc); + } + if (stat & STATUS_END_CMD_RESP) mxcmci_cmd_done(host, stat); + #ifdef HAS_DMA if (mxcmci_use_dma(host) && (stat & (STATUS_DATA_TRANS_DONE | STATUS_WRITE_OP_DONE))) @@ -677,11 +705,30 @@ static int mxcmci_get_ro(struct mmc_host *mmc) return -ENOSYS; } +static void mxcmci_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct mxcmci_host *host = mmc_priv(mmc); + unsigned long flags; + u32 int_cntr; + + spin_lock_irqsave(&host->lock, flags); + host->use_sdio = enable; + int_cntr = readl(host->base + MMC_REG_INT_CNTR); + + if (enable) + int_cntr |= INT_SDIO_IRQ_EN; + else + int_cntr &= ~INT_SDIO_IRQ_EN; + + writel(int_cntr, host->base + MMC_REG_INT_CNTR); + spin_unlock_irqrestore(&host->lock, flags); +} static const struct mmc_host_ops mxcmci_ops = { - .request = mxcmci_request, - .set_ios = mxcmci_set_ios, - .get_ro = mxcmci_get_ro, + .request = mxcmci_request, + .set_ios = mxcmci_set_ios, + .get_ro = mxcmci_get_ro, + .enable_sdio_irq = mxcmci_enable_sdio_irq, }; static int mxcmci_probe(struct platform_device *pdev) @@ -709,7 +756,7 @@ static int mxcmci_probe(struct platform_device *pdev) } mmc->ops = &mxcmci_ops; - mmc->caps = MMC_CAP_4_BIT_DATA; + mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; /* MMC core transfer sizes tunable parameters */ mmc->max_hw_segs = 64; @@ -728,6 +775,7 @@ static int mxcmci_probe(struct platform_device *pdev) host->mmc = mmc; host->pdata = pdev->dev.platform_data; + spin_lock_init(&host->lock); if (host->pdata && host->pdata->ocr_avail) mmc->ocr_avail = host->pdata->ocr_avail; |