sdio: add interface for host side SDIO interrupt reporting (17b759af) · Commits · 戴 / test

drivers/mmc/core/host.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -100,6 +100,9 @@ int mmc_add_host(struct mmc_host *host)
		{
		int err;

		WARN_ON((host->caps & MMC_CAP_SDIO_IRQ) &&
		!host->ops->enable_sdio_irq);

		if (!idr_pre_get(&mmc_host_idr, GFP_KERNEL))
		return -ENOMEM;

+7 −1

Original line number	Diff line number	Diff line
		@@ -70,7 +70,8 @@ static int sdio_irq_thread(void *_host)
		* asynchronous notification of pending SDIO card interrupts
		* hence we poll for them in that case.
		*/
		period = msecs_to_jiffies(10);
		period = (host->caps & MMC_CAP_SDIO_IRQ) ?
		MAX_SCHEDULE_TIMEOUT : msecs_to_jiffies(10);

		pr_debug("%s: IRQ thread started (poll period = %lu jiffies)\n",
		mmc_hostname(host), period);
		@@ -104,11 +105,16 @@ static int sdio_irq_thread(void *_host)
		ssleep(1);

		set_task_state(current, TASK_INTERRUPTIBLE);
		if (host->caps & MMC_CAP_SDIO_IRQ)
		host->ops->enable_sdio_irq(host, 1);
		if (!kthread_should_stop())
		schedule_timeout(period);
		set_task_state(current, TASK_RUNNING);
		} while (!kthread_should_stop());

		if (host->caps & MMC_CAP_SDIO_IRQ)
		host->ops->enable_sdio_irq(host, 0);

		pr_debug("%s: IRQ thread exiting with code %d\n",
		mmc_hostname(host), ret);

+8 −0

Original line number	Diff line number	Diff line
		@@ -51,6 +51,7 @@ struct mmc_host_ops {
		void (request)(struct mmc_host host, struct mmc_request *req);
		void (set_ios)(struct mmc_host host, struct mmc_ios *ios);
		int (get_ro)(struct mmc_host host);
		void (enable_sdio_irq)(struct mmc_host host, int enable);
		};

		struct mmc_card;
		@@ -89,6 +90,7 @@ struct mmc_host {
		#define MMC_CAP_MULTIWRITE (1 << 1) /* Can accurately report bytes sent to card on error */
		#define MMC_CAP_MMC_HIGHSPEED (1 << 2) /* Can do MMC high-speed timing */
		#define MMC_CAP_SD_HIGHSPEED (1 << 3) /* Can do SD high-speed timing */
		#define MMC_CAP_SDIO_IRQ (1 << 4) /* Can signal pending SDIO IRQs */

		/* host specific block data */
		unsigned int max_seg_size; /* see blk_queue_max_segment_size */
		@@ -150,5 +152,11 @@ extern int mmc_resume_host(struct mmc_host *);
		extern void mmc_detect_change(struct mmc_host *, unsigned long delay);
		extern void mmc_request_done(struct mmc_host , struct mmc_request );

		static inline void mmc_signal_sdio_irq(struct mmc_host *host)
		{
		host->ops->enable_sdio_irq(host, 0);
		wake_up_process(host->sdio_irq_thread);
		}

		#endif