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Bluetooth: hci_bcm: Prepare PM runtime support 

Change some CONFIG_PM_SLEEP to CONFIG_PM as hu and is_suspended parameters
will be used during PM runtime callbacks.

Add bcm_suspend_device() and bcm_resume_device() which performs link
management for PM callbacks.
These functions will be used for runtime management.

Signed-off-by: Frederic Danis <frederic.danis@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Frederic Danis 2015-09-23 18:18:09 +02:00 committed by Marcel Holtmann
parent 5cebdfea32
commit b7a622a249
1 changed files with 60 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
drivers/bluetooth/hci_bcm.c
View File

@ -56,7 +56,7 @@ struct bcm_device {
int irq;
u8 irq_polarity;
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_PM
struct hci_uart *hu;
bool is_suspended; /* suspend/resume flag */
#endif
@ -153,7 +153,7 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered)
return 0;
}
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_PM
static irqreturn_t bcm_host_wake(int irq, void *data)
{
struct bcm_device *bdev = data;
@ -259,7 +259,7 @@ static int bcm_open(struct hci_uart *hu)
if (hu->tty->dev->parent == dev->pdev->dev.parent) {
bcm->dev = dev;
hu->init_speed = dev->init_speed;
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_PM
dev->hu = hu;
#endif
bcm_gpio_set_power(bcm->dev, true);
@ -283,7 +283,7 @@ static int bcm_close(struct hci_uart *hu)
mutex_lock(&bcm_device_lock);
if (bcm_device_exists(bdev)) {
bcm_gpio_set_power(bdev, false);
#ifdef CONFIG_PM_SLEEP
#ifdef CONFIG_PM
if (device_can_wakeup(&bdev->pdev->dev)) {
devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev);
device_init_wakeup(&bdev->pdev->dev, false);
@ -425,24 +425,17 @@ static struct sk_buff *bcm_dequeue(struct hci_uart *hu)
return skb_dequeue(&bcm->txq);
}
#ifdef CONFIG_PM_SLEEP
/* Platform suspend callback */
static int bcm_suspend(struct device *dev)
#ifdef CONFIG_PM
static int bcm_suspend_device(struct device *dev)
{
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
int error;
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
bt_dev_dbg(bdev, "");
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
if (!bdev->is_suspended) {
if (!bdev->is_suspended && bdev->hu) {
hci_uart_set_flow_control(bdev->hu, true);
/* Once this callback returns, driver suspends BT via GPIO */
/* Once this returns, driver suspends BT via GPIO */
bdev->is_suspended = true;
}
@ -453,6 +446,52 @@ static int bcm_suspend(struct device *dev)
mdelay(15);
}
return 0;
}
static int bcm_resume_device(struct device *dev)
{
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
bt_dev_dbg(bdev, "");
if (bdev->device_wakeup) {
gpiod_set_value(bdev->device_wakeup, true);
bt_dev_dbg(bdev, "resume, delaying 15 ms");
mdelay(15);
}
/* When this executes, the device has woken up already */
if (bdev->is_suspended && bdev->hu) {
bdev->is_suspended = false;
hci_uart_set_flow_control(bdev->hu, false);
}
return 0;
}
#endif
#ifdef CONFIG_PM_SLEEP
/* Platform suspend callback */
static int bcm_suspend(struct device *dev)
{
struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev));
int error;
bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended);
/* bcm_suspend can be called at any time as long as platform device is
* bound, so it should use bcm_device_lock to protect access to hci_uart
* and device_wake-up GPIO.
*/
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
goto unlock;
bcm_suspend_device(dev);
if (device_may_wakeup(&bdev->pdev->dev)) {
error = enable_irq_wake(bdev->irq);
if (!error)
@ -472,6 +511,10 @@ static int bcm_resume(struct device *dev)
bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended);
/* bcm_resume can be called at any time as long as platform device is
* bound, so it should use bcm_device_lock to protect access to hci_uart
* and device_wake-up GPIO.
*/
mutex_lock(&bcm_device_lock);
if (!bdev->hu)
@ -482,18 +525,7 @@ static int bcm_resume(struct device *dev)
bt_dev_dbg(bdev, "BCM irq: disabled");
}
if (bdev->device_wakeup) {
gpiod_set_value(bdev->device_wakeup, true);
bt_dev_dbg(bdev, "resume, delaying 15 ms");
mdelay(15);
}
/* When this callback executes, the device has woken up already */
if (bdev->is_suspended) {
bdev->is_suspended = false;
hci_uart_set_flow_control(bdev->hu, false);
}
bcm_resume_device(dev);
unlock:
mutex_unlock(&bcm_device_lock);