bcma: support for suspend and resume

commit 775ab52142b02237a54184238e922251c59a2b5c upstream.

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

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h
index 30a3085..fda56bd 100644 (file)
--- a/drivers/bcma/bcma_private.h
+++ b/drivers/bcma/bcma_private.h
@@ -18,6 +18,9 @@ void bcma_bus_unregister(struct bcma_bus *bus);
 int __init bcma_bus_early_register(struct bcma_bus *bus,
                                   struct bcma_device *core_cc,
                                   struct bcma_device *core_mips);
+#ifdef CONFIG_PM
+int bcma_bus_resume(struct bcma_bus *bus);
+#endif
 
 /* scan.c */
 int bcma_bus_scan(struct bcma_bus *bus);

diff --git a/drivers/bcma/host_pci.c b/drivers/bcma/host_pci.c
index 1b51d8b..990f5a8 100644 (file)
--- a/drivers/bcma/host_pci.c
+++ b/drivers/bcma/host_pci.c
@@ -224,6 +224,41 @@ static void bcma_host_pci_remove(struct pci_dev *dev)
        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) = {
        { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x0576) },
        { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, 0x4331) },
@@ -239,6 +274,8 @@ static struct pci_driver bcma_pci_bridge_driver = {
        .id_table = bcma_pci_bridge_tbl,
        .probe = bcma_host_pci_probe,
        .remove = bcma_host_pci_remove,
+       .suspend = bcma_host_pci_suspend,
+       .resume = bcma_host_pci_resume,
 };
 
 int __init bcma_host_pci_init(void)

diff --git a/drivers/bcma/main.c b/drivers/bcma/main.c
index 70c84b9..10f92b3 100644 (file)
--- a/drivers/bcma/main.c
+++ b/drivers/bcma/main.c
@@ -240,6 +240,22 @@ int __init bcma_bus_early_register(struct bcma_bus *bus,
        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)
 {
        drv->drv.name = drv->name;