From 4c98cfef2efa6b6662ac28c4f0069964bbd9fdf9 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 29 Nov 2005 09:09:32 +0100 Subject: [ALSA] PATCH] Add PM support to PnP drivers Add suspend/resume callback to pnp_driver and pnp_card_driver. Signed-off-by: Takashi Iwai --- drivers/pnp/card.c | 25 +++++++++++++++++++++++++ drivers/pnp/driver.c | 20 ++++++++++++++++++++ 2 files changed, 45 insertions(+) (limited to 'drivers') 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..ea2cb9a8b21 100644 --- a/drivers/pnp/driver.c +++ b/drivers/pnp/driver.c @@ -146,10 +146,30 @@ 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; + + if (pnp_drv && pnp_drv->suspend) + return pnp_drv->suspend(pnp_dev, state); + return 0; +} + +static void pnp_bus_resume(struct device *dev) +{ + struct pnp_dev * pnp_dev = to_pnp_dev(dev); + struct pnp_driver * pnp_drv = pnp_dev->driver; + + if (pnp_drv && pnp_drv->resume) + pnp_drv->resume(pnp_dev); +} struct bus_type pnp_bus_type = { .name = "pnp", .match = pnp_bus_match, + .suspend = pnp_bus_suspend, + .resume = pnp_bus_resume, }; -- cgit v1.2.3-18-g5258 From 68094e3251a664ee1389fcf179497237cbf78331 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Tue, 29 Nov 2005 09:09:32 +0100 Subject: [ALSA] [PATCH] alsa: Improved PnP suspend support Also use the PnP functions to start/stop the devices during the suspend so that drivers will not have to duplicate this code. Cc: Adam Belay Cc: Jaroslav Kysela Cc: Takashi Iwai Signed-off-by: Pierre Ossman Signed-off-by: Andrew Morton Signed-off-by: Takashi Iwai --- drivers/pnp/driver.c | 37 ++++++++++++++++++++---- drivers/pnp/manager.c | 78 ++++++++++++++++++++++++++++++++++++++------------- 2 files changed, 91 insertions(+), 24 deletions(-) (limited to 'drivers') diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c index ea2cb9a8b21..15fb758a9e5 100644 --- a/drivers/pnp/driver.c +++ b/drivers/pnp/driver.c @@ -150,19 +150,46 @@ 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; + } - if (pnp_drv && pnp_drv->suspend) - return pnp_drv->suspend(pnp_dev, state); return 0; } -static void pnp_bus_resume(struct device *dev) +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 && pnp_drv->resume) - pnp_drv->resume(pnp_dev); + if (pnp_drv->resume) + return pnp_drv->resume(pnp_dev); + + return 0; } struct bus_type pnp_bus_type = { 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 @@ -469,6 +469,53 @@ int pnp_auto_config_dev(struct pnp_dev *dev) return -EBUSY; } +/** + * 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); -- cgit v1.2.3-18-g5258