diff options
author | Simon Horman <horms@verge.net.au> | 2011-08-25 10:27:26 +0900 |
---|---|---|
committer | Chris Ball <cjb@laptop.org> | 2011-10-26 15:43:36 -0400 |
commit | 7729c7a232a95360fa17ffe8beb1adb621bc0ba0 (patch) | |
tree | 1e535ba26812b203e802939b9dbc3bb788f94232 /drivers/mmc/host/tmio_mmc_pio.c | |
parent | 54680fe7f6ad0fb0c52e330484e2cf1609587862 (diff) | |
download | op-kernel-dev-7729c7a232a95360fa17ffe8beb1adb621bc0ba0.zip op-kernel-dev-7729c7a232a95360fa17ffe8beb1adb621bc0ba0.tar.gz |
mmc: tmio: Provide separate interrupt handlers
Provide separate interrupt handlers which may be used by platforms where
SDHI has three interrupt sources.
This patch also removes the commented-out handling of CRC and other errors.
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/tmio_mmc_pio.c')
-rw-r--r-- | drivers/mmc/host/tmio_mmc_pio.c | 131 |
1 files changed, 83 insertions, 48 deletions
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index f0c7830..6275e3d 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -545,44 +545,20 @@ out: spin_unlock(&host->lock); } -irqreturn_t tmio_mmc_irq(int irq, void *devid) +static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host, + int *ireg, int *status) { - struct tmio_mmc_host *host = devid; - struct mmc_host *mmc = host->mmc; - struct tmio_mmc_data *pdata = host->pdata; - unsigned int ireg, status; - unsigned int sdio_ireg, sdio_status; - - pr_debug("MMC IRQ begin\n"); - - status = sd_ctrl_read32(host, CTL_STATUS); - ireg = status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; + *status = sd_ctrl_read32(host, CTL_STATUS); + *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; - sdio_ireg = 0; - if (!ireg && pdata->flags & TMIO_MMC_SDIO_IRQ) { - sdio_status = sd_ctrl_read16(host, CTL_SDIO_STATUS); - sdio_ireg = sdio_status & TMIO_SDIO_MASK_ALL & - ~host->sdio_irq_mask; - - sd_ctrl_write16(host, CTL_SDIO_STATUS, sdio_status & ~TMIO_SDIO_MASK_ALL); - - if (sdio_ireg && !host->sdio_irq_enabled) { - pr_warning("tmio_mmc: Spurious SDIO IRQ, disabling! 0x%04x 0x%04x 0x%04x\n", - sdio_status, host->sdio_irq_mask, sdio_ireg); - tmio_mmc_enable_sdio_irq(mmc, 0); - goto out; - } - - if (mmc->caps & MMC_CAP_SDIO_IRQ && - sdio_ireg & TMIO_SDIO_STAT_IOIRQ) - mmc_signal_sdio_irq(mmc); - - if (sdio_ireg) - goto out; - } + pr_debug_status(*status); + pr_debug_status(*ireg); +} - pr_debug_status(status); - pr_debug_status(ireg); +static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, + int ireg, int status) +{ + struct mmc_host *mmc = host->mmc; /* Card insert / remove attempts */ if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { @@ -592,43 +568,102 @@ irqreturn_t tmio_mmc_irq(int irq, void *devid) ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && !work_pending(&mmc->detect.work)) mmc_detect_change(host->mmc, msecs_to_jiffies(100)); - goto out; + return true; } - /* CRC and other errors */ -/* if (ireg & TMIO_STAT_ERR_IRQ) - * handled |= tmio_error_irq(host, irq, stat); - */ + return false; +} + +irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid) +{ + unsigned int ireg, status; + struct tmio_mmc_host *host = devid; + tmio_mmc_card_irq_status(host, &ireg, &status); + __tmio_mmc_card_detect_irq(host, ireg, status); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(tmio_mmc_card_detect_irq); + +static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, + int ireg, int status) +{ /* Command completion */ if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT); tmio_mmc_cmd_irq(host, status); - goto out; + return true; } /* Data transfer */ if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); tmio_mmc_pio_irq(host); - goto out; + return true; } /* Data transfer completion */ if (ireg & TMIO_STAT_DATAEND) { tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); tmio_mmc_data_irq(host); - goto out; + return true; } - pr_warning("tmio_mmc: Spurious irq, disabling! " - "0x%08x 0x%08x 0x%08x\n", status, host->sdcard_irq_mask, ireg); - pr_debug_status(status); - tmio_mmc_disable_mmc_irqs(host, status & ~host->sdcard_irq_mask); + return false; +} + +irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid) +{ + unsigned int ireg, status; + struct tmio_mmc_host *host = devid; + + tmio_mmc_card_irq_status(host, &ireg, &status); + __tmio_mmc_sdcard_irq(host, ireg, status); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(tmio_mmc_sdcard_irq); + +irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) +{ + struct tmio_mmc_host *host = devid; + struct mmc_host *mmc = host->mmc; + struct tmio_mmc_data *pdata = host->pdata; + unsigned int ireg, status; + + if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) + return IRQ_HANDLED; + + status = sd_ctrl_read16(host, CTL_SDIO_STATUS); + ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; + + sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL); + + if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) + mmc_signal_sdio_irq(mmc); + + return IRQ_HANDLED; +} +EXPORT_SYMBOL(tmio_mmc_sdio_irq); + +irqreturn_t tmio_mmc_irq(int irq, void *devid) +{ + struct tmio_mmc_host *host = devid; + unsigned int ireg, status; + + pr_debug("MMC IRQ begin\n"); + + tmio_mmc_card_irq_status(host, &ireg, &status); + if (__tmio_mmc_card_detect_irq(host, ireg, status)) + return IRQ_HANDLED; + if (__tmio_mmc_sdcard_irq(host, ireg, status)) + return IRQ_HANDLED; + + tmio_mmc_sdio_irq(irq, devid); -out: return IRQ_HANDLED; } EXPORT_SYMBOL(tmio_mmc_irq); |