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Commit 8463200a authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown
Browse files

ACPI: EC: Rename some variables 



No functional changes.

Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Acked-by: default avatarRafael J. Wysocki <rjw@suse.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 7c6db4e0

drivers/acpi/ec.c

+63 −55
Original line number Diff line number Diff line
@@ -95,10 +95,11 @@ struct acpi_ec_query_handler { 
	u8 query_bit;

};



struct transaction_data {

struct transaction {

	const u8 *wdata;

	u8 *rdata;

	unsigned short irq_count;

	u8 command;

	u8 wlen;

	u8 rlen;

};
@@ -113,8 +114,8 @@ static struct acpi_ec { 
	struct mutex lock;

	wait_queue_head_t wait;

	struct list_head list;

	struct transaction_data *t;

	spinlock_t t_lock;

	struct transaction *curr;

	spinlock_t curr_lock;

} *boot_ec, *first_ec;



/*
@@ -176,37 +177,37 @@ static int ec_transaction_done(struct acpi_ec *ec) 
{

	unsigned long flags;

	int ret = 0;

	spin_lock_irqsave(&ec->t_lock, flags);

	if (!ec->t || (!ec->t->wlen && !ec->t->rlen))

	spin_lock_irqsave(&ec->curr_lock, flags);

	if (!ec->curr || (!ec->curr->wlen && !ec->curr->rlen))

		ret = 1;

	spin_unlock_irqrestore(&ec->t_lock, flags);

	spin_unlock_irqrestore(&ec->curr_lock, flags);

	return ret;

}



static void gpe_transaction(struct acpi_ec *ec, u8 status)

{

	unsigned long flags;

	spin_lock_irqsave(&ec->t_lock, flags);

	if (!ec->t)

	spin_lock_irqsave(&ec->curr_lock, flags);

	if (!ec->curr)

		goto unlock;

	if (ec->t->wlen > 0) {

	if (ec->curr->wlen > 0) {

		if ((status & ACPI_EC_FLAG_IBF) == 0) {

			acpi_ec_write_data(ec, *(ec->t->wdata++));

			--ec->t->wlen;

			acpi_ec_write_data(ec, *(ec->curr->wdata++));

			--ec->curr->wlen;

		} else

			/* false interrupt, state didn't change */

			++ec->t->irq_count;

			++ec->curr->irq_count;



	} else if (ec->t->rlen > 0) {

	} else if (ec->curr->rlen > 0) {

		if ((status & ACPI_EC_FLAG_OBF) == 1) {

			*(ec->t->rdata++) = acpi_ec_read_data(ec);

			--ec->t->rlen;

			*(ec->curr->rdata++) = acpi_ec_read_data(ec);

			--ec->curr->rlen;

		} else

			/* false interrupt, state didn't change */

			++ec->t->irq_count;

			++ec->curr->irq_count;

	}

unlock:

	spin_unlock_irqrestore(&ec->t_lock, flags);

	spin_unlock_irqrestore(&ec->curr_lock, flags);

}



static int acpi_ec_wait(struct acpi_ec *ec)
@@ -248,15 +249,11 @@ static int ec_poll(struct acpi_ec *ec) 
	return -ETIME;

}



static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,

					const u8 * wdata, unsigned wdata_len,

					u8 * rdata, unsigned rdata_len,

static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,

					struct transaction *t,

					int force_poll)

{

	unsigned long tmp;

	struct transaction_data t = {.wdata = wdata, .rdata = rdata,

				     .wlen = wdata_len, .rlen = rdata_len,

				     .irq_count = 0};

	int ret = 0;

	pr_debug(PREFIX "transaction start\n");

	/* disable GPE during transaction if storm is detected */
@@ -265,29 +262,30 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command, 
		acpi_disable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);

	}

	/* start transaction */

	spin_lock_irqsave(&ec->t_lock, tmp);

	spin_lock_irqsave(&ec->curr_lock, tmp);

	/* following two actions should be kept atomic */

	ec->t = &t;

	acpi_ec_write_cmd(ec, command);

	if (command == ACPI_EC_COMMAND_QUERY)

	t->irq_count = 0;

	ec->curr = t;

	acpi_ec_write_cmd(ec, ec->curr->command);

	if (ec->curr->command == ACPI_EC_COMMAND_QUERY)

		clear_bit(EC_FLAGS_QUERY_PENDING, &ec->flags);

	spin_unlock_irqrestore(&ec->t_lock, tmp);

	spin_unlock_irqrestore(&ec->curr_lock, tmp);

	/* if we selected poll mode or failed in GPE-mode do a poll loop */

	if (force_poll ||

	    !test_bit(EC_FLAGS_GPE_MODE, &ec->flags) ||

	    acpi_ec_wait(ec))

		ret = ec_poll(ec);

	pr_debug(PREFIX "transaction end\n");

	spin_lock_irqsave(&ec->t_lock, tmp);

	ec->t = NULL;

	spin_unlock_irqrestore(&ec->t_lock, tmp);

	spin_lock_irqsave(&ec->curr_lock, tmp);

	ec->curr = NULL;

	spin_unlock_irqrestore(&ec->curr_lock, tmp);

	if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {

		/* check if we received SCI during transaction */

		ec_check_sci(ec, acpi_ec_read_status(ec));

		/* it is safe to enable GPE outside of transaction */

		acpi_enable_gpe(NULL, ec->gpe, ACPI_NOT_ISR);

	} else if (test_bit(EC_FLAGS_GPE_MODE, &ec->flags) &&

		   t.irq_count > ACPI_EC_STORM_THRESHOLD) {

		   t->irq_count > ACPI_EC_STORM_THRESHOLD) {

		pr_debug(PREFIX "GPE storm detected\n");

		set_bit(EC_FLAGS_GPE_STORM, &ec->flags);

	}
@@ -300,17 +298,15 @@ static int ec_check_ibf0(struct acpi_ec *ec) 
	return (status & ACPI_EC_FLAG_IBF) == 0;

}



static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,

			       const u8 * wdata, unsigned wdata_len,

			       u8 * rdata, unsigned rdata_len,

static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t,

			       int force_poll)

{

	int status;

	u32 glk;

	if (!ec || (wdata_len && !wdata) || (rdata_len && !rdata))

	if (!ec || (!t) || (t->wlen && !t->wdata) || (t->rlen && !t->rdata))

		return -EINVAL;

	if (rdata)

		memset(rdata, 0, rdata_len);

	if (t->rdata)

		memset(t->rdata, 0, t->rlen);

	mutex_lock(&ec->lock);

	if (ec->global_lock) {

		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
@@ -326,10 +322,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, u8 command, 
		status = -ETIME;

		goto end;

	}

	status = acpi_ec_transaction_unlocked(ec, command,

					      wdata, wdata_len,

					      rdata, rdata_len,

					      force_poll);

	status = acpi_ec_transaction_unlocked(ec, t, force_poll);

end:

	if (ec->global_lock)

		acpi_release_global_lock(glk);
@@ -345,23 +338,32 @@ unlock: 
int acpi_ec_burst_enable(struct acpi_ec *ec)

{

	u8 d;

	return acpi_ec_transaction(ec, ACPI_EC_BURST_ENABLE, NULL, 0, &d, 1, 0);

	struct transaction t = {.command = ACPI_EC_BURST_ENABLE,

				.wdata = NULL, .rdata = &d,

				.wlen = 0, .rlen = 1};



	return acpi_ec_transaction(ec, &t, 0);

}



int acpi_ec_burst_disable(struct acpi_ec *ec)

{

	struct transaction t = {.command = ACPI_EC_BURST_DISABLE,

				.wdata = NULL, .rdata = NULL,

				.wlen = 0, .rlen = 0};



	return (acpi_ec_read_status(ec) & ACPI_EC_FLAG_BURST) ?

		acpi_ec_transaction(ec, ACPI_EC_BURST_DISABLE,

			NULL, 0, NULL, 0, 0) : 0;

				acpi_ec_transaction(ec, &t, 0) : 0;

}



static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data)

{

	int result;

	u8 d;

	struct transaction t = {.command = ACPI_EC_COMMAND_READ,

				.wdata = &address, .rdata = &d,

				.wlen = 1, .rlen = 1};



	result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_READ,

				     &address, 1, &d, 1, 0);

	result = acpi_ec_transaction(ec, &t, 0);

	*data = d;

	return result;

}
@@ -369,8 +371,11 @@ static int acpi_ec_read(struct acpi_ec *ec, u8 address, u8 * data) 
static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)

{

	u8 wdata[2] = { address, data };

	return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE,

				   wdata, 2, NULL, 0, 0);

	struct transaction t = {.command = ACPI_EC_COMMAND_WRITE,

				.wdata = wdata, .rdata = NULL,

				.wlen = 2, .rlen = 0};



	return acpi_ec_transaction(ec, &t, 0);

}



/*
@@ -432,12 +437,13 @@ int ec_transaction(u8 command, 
		   u8 * rdata, unsigned rdata_len,

		   int force_poll)

{

	struct transaction t = {.command = command,

				.wdata = wdata, .rdata = rdata,

				.wlen = wdata_len, .rlen = rdata_len};

	if (!first_ec)

		return -ENODEV;



	return acpi_ec_transaction(first_ec, command, wdata,

				   wdata_len, rdata, rdata_len,

				   force_poll);

	return acpi_ec_transaction(first_ec, &t, force_poll);

}



EXPORT_SYMBOL(ec_transaction);
@@ -446,7 +452,9 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data) 
{

	int result;

	u8 d;



	struct transaction t = {.command = ACPI_EC_COMMAND_QUERY,

				.wdata = NULL, .rdata = &d,

				.wlen = 0, .rlen = 1};

	if (!ec || !data)

		return -EINVAL;
@@ -456,7 +464,7 @@ static int acpi_ec_query(struct acpi_ec *ec, u8 * data) 
	 * bit to be cleared (and thus clearing the interrupt source).

	 */



	result = acpi_ec_transaction(ec, ACPI_EC_COMMAND_QUERY, NULL, 0, &d, 1, 0);

	result = acpi_ec_transaction(ec, &t, 0);

	if (result)

		return result;
@@ -696,7 +704,7 @@ static struct acpi_ec *make_acpi_ec(void) 
	mutex_init(&ec->lock);

	init_waitqueue_head(&ec->wait);

	INIT_LIST_HEAD(&ec->list);

	spin_lock_init(&ec->t_lock);

	spin_lock_init(&ec->curr_lock);

	return ec;

}