diff options
Diffstat (limited to 'drivers/video/via/via-core.c')
| -rw-r--r-- | drivers/video/via/via-core.c | 96 |
1 files changed, 94 insertions, 2 deletions
diff --git a/drivers/video/via/via-core.c b/drivers/video/via/via-core.c index a3aa9170950..6723d6910cd 100644 --- a/drivers/video/via/via-core.c +++ b/drivers/video/via/via-core.c @@ -15,6 +15,9 @@ #include <linux/module.h> #include <linux/interrupt.h> #include <linux/platform_device.h> +#include <linux/list.h> +#include <linux/pm.h> +#include <asm/olpc.h> /* * The default port config. @@ -29,6 +32,19 @@ static struct via_port_cfg adap_configs[] = { }; /* + * The OLPC XO-1.5 puts the camera power and reset lines onto + * GPIO 2C. + */ +static const struct via_port_cfg olpc_adap_configs[] = { + [VIA_PORT_26] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x26 }, + [VIA_PORT_31] = { VIA_PORT_I2C, VIA_MODE_I2C, VIASR, 0x31 }, + [VIA_PORT_25] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x25 }, + [VIA_PORT_2C] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x2c }, + [VIA_PORT_3D] = { VIA_PORT_GPIO, VIA_MODE_GPIO, VIASR, 0x3d }, + { 0, 0, 0, 0 } +}; + +/* * We currently only support one viafb device (will there ever be * more than one?), so just declare it globally here. */ @@ -575,6 +591,78 @@ static void via_teardown_subdevs(void) } } +/* + * Power management functions + */ +#ifdef CONFIG_PM +static LIST_HEAD(viafb_pm_hooks); +static DEFINE_MUTEX(viafb_pm_hooks_lock); + +void viafb_pm_register(struct viafb_pm_hooks *hooks) +{ + INIT_LIST_HEAD(&hooks->list); + + mutex_lock(&viafb_pm_hooks_lock); + list_add_tail(&hooks->list, &viafb_pm_hooks); + mutex_unlock(&viafb_pm_hooks_lock); +} +EXPORT_SYMBOL_GPL(viafb_pm_register); + +void viafb_pm_unregister(struct viafb_pm_hooks *hooks) +{ + mutex_lock(&viafb_pm_hooks_lock); + list_del(&hooks->list); + mutex_unlock(&viafb_pm_hooks_lock); +} +EXPORT_SYMBOL_GPL(viafb_pm_unregister); + +static int via_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct viafb_pm_hooks *hooks; + + if (state.event != PM_EVENT_SUSPEND) + return 0; + /* + * "I've occasionally hit a few drivers that caused suspend + * failures, and each and every time it was a driver bug, and + * the right thing to do was to just ignore the error and suspend + * anyway - returning an error code and trying to undo the suspend + * is not what anybody ever really wants, even if our model + *_allows_ for it." + * -- Linus Torvalds, Dec. 7, 2009 + */ + mutex_lock(&viafb_pm_hooks_lock); + list_for_each_entry_reverse(hooks, &viafb_pm_hooks, list) + hooks->suspend(hooks->private); + mutex_unlock(&viafb_pm_hooks_lock); + + pci_save_state(pdev); + pci_disable_device(pdev); + pci_set_power_state(pdev, pci_choose_state(pdev, state)); + return 0; +} + +static int via_resume(struct pci_dev *pdev) +{ + struct viafb_pm_hooks *hooks; + + /* Get the bus side powered up */ + pci_set_power_state(pdev, PCI_D0); + pci_restore_state(pdev); + if (pci_enable_device(pdev)) + return 0; + + pci_set_master(pdev); + + /* Now bring back any subdevs */ + mutex_lock(&viafb_pm_hooks_lock); + list_for_each_entry(hooks, &viafb_pm_hooks, list) + hooks->resume(hooks->private); + mutex_unlock(&viafb_pm_hooks_lock); + + return 0; +} +#endif /* CONFIG_PM */ static int __devinit via_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) @@ -584,6 +672,7 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, ret = pci_enable_device(pdev); if (ret) return ret; + /* * Global device initialization. */ @@ -591,6 +680,9 @@ static int __devinit via_pci_probe(struct pci_dev *pdev, global_dev.pdev = pdev; global_dev.chip_type = ent->driver_data; global_dev.port_cfg = adap_configs; + if (machine_is_olpc()) + global_dev.port_cfg = olpc_adap_configs; + spin_lock_init(&global_dev.reg_lock); ret = via_pci_setup_mmio(&global_dev); if (ret) @@ -663,8 +755,8 @@ static struct pci_driver via_driver = { .probe = via_pci_probe, .remove = __devexit_p(via_pci_remove), #ifdef CONFIG_PM - .suspend = viafb_suspend, - .resume = viafb_resume, + .suspend = via_suspend, + .resume = via_resume, #endif }; |