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Commit 5a0f3f1f authored by Juha Yrjola's avatar Juha Yrjola Committed by Pierre Ossman
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MMC: OMAP: Add back cover switch support 



This patch adds back MMC cover switch support in a way that
supports multiple slots.

Signed-off-by: default avatarJuha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: default avatarJarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: default avatarCarlos Eduardo Aguiar <carlos.aguiar@indt.org.br>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent abfbe5f7

drivers/mmc/host/omap.c

+84 −3
Original line number Diff line number Diff line
@@ -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)
@@ -544,6 +567,7 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) 
			if (host->cmd) {

				struct mmc_omap_slot *slot =

					host->current_slot;

				if (!mmc_omap_cover_is_open(slot))

					dev_err(mmc_dev(host->mmc),

						"command timeout, CMD %d\n",

						host->cmd->opcode);
@@ -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);