Merge git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa

3 files changed, 131 insertions, 19 deletions

diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
index bd7c966ea2d7..0ecbe4edbec1 100644
--- a/drivers/pnp/card.c
+++ b/drivers/pnp/card.c
@@ -69,6 +69,7 @@ static int card_probe(struct pnp_card * card, struct pnp_card_driver * drv)
 			return 0;
 		clink->card = card;
 		clink->driver = drv;
+		clink->pm_state = PMSG_ON;
 		if (drv->probe) {
 			if (drv->probe(clink, id)>=0)
 				return 1;
@@ -333,6 +334,28 @@ void pnp_release_card_device(struct pnp_dev * dev)
 	up_write(&dev->dev.bus->subsys.rwsem);
 }
 
+/*
+ * suspend/resume callbacks
+ */
+static int card_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+	struct pnp_card_link *link = dev->card_link;
+	if (link->pm_state.event == state.event)
+		return 0;
+	link->pm_state = state;
+	return link->driver->suspend(link, state);
+}
+
+static int card_resume(struct pnp_dev *dev)
+{
+	struct pnp_card_link *link = dev->card_link;
+	if (link->pm_state.event == PM_EVENT_ON)
+		return 0;
+	link->pm_state = PMSG_ON;
+	link->driver->resume(link);
+	return 0;
+}
+
 /**
  * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
  * @drv: pointer to the driver to register
@@ -348,6 +371,8 @@ int pnp_register_card_driver(struct pnp_card_driver * drv)
 	drv->link.flags = drv->flags;
 	drv->link.probe = NULL;
 	drv->link.remove = &card_remove_first;
+	drv->link.suspend = drv->suspend ? card_suspend : NULL;
+	drv->link.resume = drv->resume ? card_resume : NULL;
 
 	spin_lock(&pnp_lock);
 	list_add_tail(&drv->global_list, &pnp_card_drivers);
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index d3ccce706ab4..15fb758a9e52 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -146,10 +146,57 @@ static int pnp_bus_match(struct device *dev, struct device_driver *drv)
 	return 1;
 }
 
+static int pnp_bus_suspend(struct device *dev, pm_message_t state)
+{
+	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver * pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (pnp_drv->suspend) {
+		error = pnp_drv->suspend(pnp_dev, state);
+		if (error)
+			return error;
+	}
+
+	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE) &&
+	    pnp_can_disable(pnp_dev)) {
+	    	error = pnp_stop_dev(pnp_dev);
+	    	if (error)
+	    		return error;
+	}
+
+	return 0;
+}
+
+static int pnp_bus_resume(struct device *dev)
+{
+	struct pnp_dev * pnp_dev = to_pnp_dev(dev);
+	struct pnp_driver * pnp_drv = pnp_dev->driver;
+	int error;
+
+	if (!pnp_drv)
+		return 0;
+
+	if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
+		error = pnp_start_dev(pnp_dev);
+		if (error)
+			return error;
+	}
+
+	if (pnp_drv->resume)
+		return pnp_drv->resume(pnp_dev);
+
+	return 0;
+}
 
 struct bus_type pnp_bus_type = {
 	.name	= "pnp",
 	.match	= pnp_bus_match,
+	.suspend = pnp_bus_suspend,
+	.resume = pnp_bus_resume,
 };
 
 
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
index 261668618b2d..c4256aa32bcb 100644
--- a/drivers/pnp/manager.c
+++ b/drivers/pnp/manager.c
@@ -470,6 +470,53 @@ int pnp_auto_config_dev(struct pnp_dev *dev)
 }
 
 /**
+ * pnp_start_dev - low-level start of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * assumes that resources have alread been allocated
+ */
+
+int pnp_start_dev(struct pnp_dev *dev)
+{
+	if (!pnp_can_write(dev)) {
+		pnp_info("Device %s does not supported activation.", dev->dev.bus_id);
+		return -EINVAL;
+	}
+
+	if (dev->protocol->set(dev, &dev->res)<0) {
+		pnp_err("Failed to activate device %s.", dev->dev.bus_id);
+		return -EIO;
+	}
+
+	pnp_info("Device %s activated.", dev->dev.bus_id);
+
+	return 0;
+}
+
+/**
+ * pnp_stop_dev - low-level disable of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * does not free resources
+ */
+
+int pnp_stop_dev(struct pnp_dev *dev)
+{
+	if (!pnp_can_disable(dev)) {
+		pnp_info("Device %s does not supported disabling.", dev->dev.bus_id);
+		return -EINVAL;
+	}
+	if (dev->protocol->disable(dev)<0) {
+		pnp_err("Failed to disable device %s.", dev->dev.bus_id);
+		return -EIO;
+	}
+
+	pnp_info("Device %s disabled.", dev->dev.bus_id);
+
+	return 0;
+}
+
+/**
  * pnp_activate_dev - activates a PnP device for use
  * @dev: pointer to the desired device
  *
@@ -477,6 +524,8 @@ int pnp_auto_config_dev(struct pnp_dev *dev)
  */
 int pnp_activate_dev(struct pnp_dev *dev)
 {
+	int error;
+
 	if (!dev)
 		return -EINVAL;
 	if (dev->active) {
@@ -487,18 +536,11 @@ int pnp_activate_dev(struct pnp_dev *dev)
 	if (pnp_auto_config_dev(dev))
 		return -EBUSY;
 
-	if (!pnp_can_write(dev)) {
-		pnp_info("Device %s does not supported activation.", dev->dev.bus_id);
-		return -EINVAL;
-	}
-
-	if (dev->protocol->set(dev, &dev->res)<0) {
-		pnp_err("Failed to activate device %s.", dev->dev.bus_id);
-		return -EIO;
-	}
+	error = pnp_start_dev(dev);
+	if (error)
+		return error;
 
 	dev->active = 1;
-	pnp_info("Device %s activated.", dev->dev.bus_id);
 
 	return 1;
 }
@@ -511,23 +553,19 @@ int pnp_activate_dev(struct pnp_dev *dev)
  */
 int pnp_disable_dev(struct pnp_dev *dev)
 {
+	int error;
+
         if (!dev)
                 return -EINVAL;
 	if (!dev->active) {
 		return 0; /* the device is already disabled */
 	}
 
-	if (!pnp_can_disable(dev)) {
-		pnp_info("Device %s does not supported disabling.", dev->dev.bus_id);
-		return -EINVAL;
-	}
-	if (dev->protocol->disable(dev)<0) {
-		pnp_err("Failed to disable device %s.", dev->dev.bus_id);
-		return -EIO;
-	}
+	error = pnp_stop_dev(dev);
+	if (error)
+		return error;
 
 	dev->active = 0;
-	pnp_info("Device %s disabled.", dev->dev.bus_id);
 
 	/* release the resources so that other devices can use them */
 	down(&pnp_res_mutex);
@@ -558,6 +596,8 @@ EXPORT_SYMBOL(pnp_manual_config_dev);
 #if 0
 EXPORT_SYMBOL(pnp_auto_config_dev);
 #endif
+EXPORT_SYMBOL(pnp_start_dev);
+EXPORT_SYMBOL(pnp_stop_dev);
 EXPORT_SYMBOL(pnp_activate_dev);
 EXPORT_SYMBOL(pnp_disable_dev);
 EXPORT_SYMBOL(pnp_resource_change);