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bcma: support for suspend and resume

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bcma used to lock up machine without enabling PCI or initializing CC.

Cc: stable@vger.kernel.org
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rafał Miłecki 2011-12-09 22:16:07 +01:00 committed by John W. Linville
parent bbea3bc432
commit 775ab52142
3 changed files with 56 additions and 0 deletions
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3
drivers/bcma/bcma_private.h
View File

@ -18,6 +18,9 @@ void bcma_bus_unregister(struct bcma_bus *bus);
int __init bcma_bus_early_register(struct bcma_bus *bus, int __init bcma_bus_early_register(struct bcma_bus *bus,
struct bcma_device *core_cc, struct bcma_device *core_cc,
struct bcma_device *core_mips); struct bcma_device *core_mips);
#ifdef CONFIG_PM
int bcma_bus_resume(struct bcma_bus *bus);
#endif
/* scan.c */ /* scan.c */
int bcma_bus_scan(struct bcma_bus *bus); int bcma_bus_scan(struct bcma_bus *bus);

37
drivers/bcma/host_pci.c
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@ -234,6 +234,41 @@ static void bcma_host_pci_remove(struct pci_dev *dev)
pci_set_drvdata(dev, NULL); pci_set_drvdata(dev, NULL);
} }
#ifdef CONFIG_PM
static int bcma_host_pci_suspend(struct pci_dev *dev, pm_message_t state)
{
/* Host specific */
pci_save_state(dev);
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, state));
return 0;
}
static int bcma_host_pci_resume(struct pci_dev *dev)
{
struct bcma_bus *bus = pci_get_drvdata(dev);
int err;
/* Host specific */
pci_set_power_state(dev, 0);
err = pci_enable_device(dev);
if (err)
return err;
pci_restore_state(dev);
/* Bus specific */
err = bcma_bus_resume(bus);
if (err)
return err;
return 0;
}
#else /* CONFIG_PM */
# define bcma_host_pci_suspend NULL
# define bcma_host_pci_resume NULL
#endif /* CONFIG_PM */
static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = { static DEFINE_PCI_DEVICE_TABLE(bcma_pci_bridge_tbl) = {
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) }, { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
{ PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) }, { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
@ -249,6 +284,8 @@ static struct pci_driver bcma_pci_bridge_driver = {
.id_table = bcma_pci_bridge_tbl, .id_table = bcma_pci_bridge_tbl,
.probe = bcma_host_pci_probe, .probe = bcma_host_pci_probe,
.remove = bcma_host_pci_remove, .remove = bcma_host_pci_remove,
.suspend = bcma_host_pci_suspend,
.resume = bcma_host_pci_resume,
}; };
int __init bcma_host_pci_init(void) int __init bcma_host_pci_init(void)

16
drivers/bcma/main.c
View File

@ -240,6 +240,22 @@ int __init bcma_bus_early_register(struct bcma_bus *bus,
return 0; return 0;
} }
#ifdef CONFIG_PM
int bcma_bus_resume(struct bcma_bus *bus)
{
struct bcma_device *core;
/* Init CC core */
core = bcma_find_core(bus, BCMA_CORE_CHIPCOMMON);
if (core) {
bus->drv_cc.setup_done = false;
bcma_core_chipcommon_init(&bus->drv_cc);
}
return 0;
}
#endif
int __bcma_driver_register(struct bcma_driver *drv, struct module *owner) int __bcma_driver_register(struct bcma_driver *drv, struct module *owner)
{ {
drv->drv.name = drv->name; drv->drv.name = drv->name;