sdio: add interface for host side SDIO interrupt reporting
Signed-off-by: Nicolas Pitre <npitre@mvista.com> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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112c9db91e
commit
17b759aff9
3 changed files with 18 additions and 1 deletions
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@ -100,6 +100,9 @@ int mmc_add_host(struct mmc_host *host)
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{
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int err;
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WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
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!host->ops->enable_sdio_irq);
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if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
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return -ENOMEM;
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@ -70,7 +70,8 @@ static int sdio_irq_thread(void *_host)
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* asynchronous notification of pending SDIO card interrupts
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* hence we poll for them in that case.
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*/
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period = msecs_to_jiffies(10);
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period = (host->caps & MMC_CAP_SDIO_IRQ) ?
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MAX_SCHEDULE_TIMEOUT : msecs_to_jiffies(10);
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pr_debug("%s: IRQ thread started (poll period = %lu jiffies)\n",
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mmc_hostname(host), period);
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@ -104,11 +105,16 @@ static int sdio_irq_thread(void *_host)
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ssleep(1);
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set_task_state(current, TASK_INTERRUPTIBLE);
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if (host->caps & MMC_CAP_SDIO_IRQ)
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host->ops->enable_sdio_irq(host, 1);
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if (!kthread_should_stop())
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schedule_timeout(period);
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set_task_state(current, TASK_RUNNING);
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} while (!kthread_should_stop());
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if (host->caps & MMC_CAP_SDIO_IRQ)
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host->ops->enable_sdio_irq(host, 0);
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pr_debug("%s: IRQ thread exiting with code %d\n",
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mmc_hostname(host), ret);
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@ -51,6 +51,7 @@ struct mmc_host_ops {
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void (*request)(struct mmc_host *host, struct mmc_request *req);
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void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
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int (*get_ro)(struct mmc_host *host);
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void (*enable_sdio_irq)(struct mmc_host *host, int enable);
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};
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struct mmc_card;
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@ -89,6 +90,7 @@ struct mmc_host {
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#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
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#define MMC_CAP_MMC_HIGHSPEED (1 << 2) /* Can do MMC high-speed timing */
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#define MMC_CAP_SD_HIGHSPEED (1 << 3) /* Can do SD high-speed timing */
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#define MMC_CAP_SDIO_IRQ (1 << 4) /* Can signal pending SDIO IRQs */
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/* host specific block data */
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unsigned int max_seg_size; /* see blk_queue_max_segment_size */
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@ -150,5 +152,11 @@ extern int mmc_resume_host(struct mmc_host *);
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extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
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extern void mmc_request_done(struct mmc_host *, struct mmc_request *);
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static inline void mmc_signal_sdio_irq(struct mmc_host *host)
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{
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host->ops->enable_sdio_irq(host, 0);
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wake_up_process(host->sdio_irq_thread);
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}
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#endif
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