diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/omap.c | 87 |
1 files changed, 84 insertions, 3 deletions
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index 59eac721184..712a9608acf 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -106,6 +106,10 @@ struct mmc_omap_slot { unsigned int fclk_freq; unsigned powered:1; + struct work_struct switch_work; + struct timer_list switch_timer; + unsigned cover_open; + struct mmc_request *mrq; struct mmc_omap_host *host; struct mmc_host *mmc; @@ -226,6 +230,25 @@ static void mmc_omap_release_slot(struct mmc_omap_slot *slot) spin_unlock_irqrestore(&host->slot_lock, flags); } +static inline +int mmc_omap_cover_is_open(struct mmc_omap_slot *slot) +{ + return slot->pdata->get_cover_state(mmc_dev(slot->mmc), slot->id); +} + +static ssize_t +mmc_omap_show_cover_switch(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct mmc_host *mmc = container_of(dev, struct mmc_host, class_dev); + struct mmc_omap_slot *slot = mmc_priv(mmc); + + return sprintf(buf, "%s\n", mmc_omap_cover_is_open(slot) ? "open" : + "closed"); +} + +static DEVICE_ATTR(cover_switch, S_IRUGO, mmc_omap_show_cover_switch, NULL); + static ssize_t mmc_omap_show_slot_name(struct device *dev, struct device_attribute *attr, char *buf) @@ -544,9 +567,10 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) if (host->cmd) { struct mmc_omap_slot *slot = host->current_slot; - dev_err(mmc_dev(host->mmc), - "command timeout, CMD %d\n", - host->cmd->opcode); + if (!mmc_omap_cover_is_open(slot)) + dev_err(mmc_dev(host->mmc), + "command timeout, CMD %d\n", + host->cmd->opcode); host->cmd->error = -ETIMEDOUT; end_command = 1; } @@ -592,6 +616,42 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) return IRQ_HANDLED; } +void omap_mmc_notify_cover_event(struct device *dev, int slot, int is_closed) +{ + struct mmc_omap_host *host = dev_get_drvdata(dev); + + BUG_ON(slot >= host->nr_slots); + + /* Other subsystems can call in here before we're initialised. */ + if (host->nr_slots == 0 || !host->slots[slot]) + return; + + schedule_work(&host->slots[slot]->switch_work); +} + +static void mmc_omap_switch_timer(unsigned long arg) +{ + struct mmc_omap_slot *slot = (struct mmc_omap_slot *) arg; + + schedule_work(&slot->switch_work); +} + +static void mmc_omap_cover_handler(struct work_struct *work) +{ + struct mmc_omap_slot *slot = container_of(work, struct mmc_omap_slot, + switch_work); + int cover_open; + + cover_open = mmc_omap_cover_is_open(slot); + if (cover_open != slot->cover_open) { + sysfs_notify(&slot->mmc->class_dev.kobj, NULL, "cover_switch"); + slot->cover_open = cover_open; + dev_info(mmc_dev(slot->mmc), "cover is now %s\n", + cover_open ? "open" : "closed"); + } + mmc_detect_change(slot->mmc, slot->id); +} + /* Prepare to transfer the next segment of a scatterlist */ static void mmc_omap_prepare_dma(struct mmc_omap_host *host, struct mmc_data *data) @@ -1062,8 +1122,24 @@ static int __init mmc_omap_new_slot(struct mmc_omap_host *host, int id) goto err_remove_host; } + if (slot->pdata->get_cover_state != NULL) { + r = device_create_file(&mmc->class_dev, + &dev_attr_cover_switch); + if (r < 0) + goto err_remove_slot_name; + + INIT_WORK(&slot->switch_work, mmc_omap_cover_handler); + init_timer(&slot->switch_timer); + slot->switch_timer.function = mmc_omap_switch_timer; + slot->switch_timer.data = (unsigned long) slot; + schedule_work(&slot->switch_work); + } + return 0; +err_remove_slot_name: + if (slot->pdata->name != NULL) + device_remove_file(&mmc->class_dev, &dev_attr_slot_name); err_remove_host: mmc_remove_host(mmc); mmc_free_host(mmc); @@ -1076,6 +1152,11 @@ static void mmc_omap_remove_slot(struct mmc_omap_slot *slot) if (slot->pdata->name != NULL) device_remove_file(&mmc->class_dev, &dev_attr_slot_name); + if (slot->pdata->get_cover_state != NULL) + device_remove_file(&mmc->class_dev, &dev_attr_cover_switch); + + del_timer_sync(&slot->switch_timer); + flush_scheduled_work(); mmc_remove_host(mmc); mmc_free_host(mmc); |