Commit 17b759af authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Pierre Ossman

sdio: add interface for host side SDIO interrupt reporting

Signed-off-by: default avatarNicolas Pitre <npitre@mvista.com>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent 112c9db9
......@@ -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;
......
......@@ -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);
......
......@@ -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
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