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authorLinus Torvalds <torvalds@g5.osdl.org>2006-01-04 16:38:36 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-04 16:38:36 -0800
commit4da5cc2cec8caec1d357053e85a7a32f243f93a1 (patch)
tree3f8b603af4af88f86be7ec1d4e3639a7fc9dd1a6 /drivers
parent25c862cc9ea9b312c25a9f577f91b973131f1261 (diff)
parentc6f43290ae687c11cdcd150d8bfeb57ec29cfa5b (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/perex/alsa
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pnp/card.c25
-rw-r--r--drivers/pnp/driver.c47
-rw-r--r--drivers/pnp/manager.c78
3 files changed, 131 insertions, 19 deletions
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
index bd7c966ea2d..0ecbe4edbec 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 d3ccce706ab..15fb758a9e5 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 261668618b2..c4256aa32bc 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);