/* * pnpacpi -- PnP ACPI driver * * Copyright (c) 2004 Matthieu Castet * Copyright (c) 2004 Li Shaohua * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include #include #include #include #include "../base.h" #include "pnpacpi.h" static int num; /* We need only to blacklist devices that have already an acpi driver that * can't use pnp layer. We don't need to blacklist device that are directly * used by the kernel (PCI root, ...), as it is harmless and there were * already present in pnpbios. But there is an exception for devices that * have irqs (PIC, Timer) because we call acpi_register_gsi. * Finally, only devices that have a CRS method need to be in this list. */ static struct acpi_device_id excluded_id_list[] __initdata = { {"PNP0C09", 0}, /* EC */ {"PNP0C0F", 0}, /* Link device */ {"PNP0000", 0}, /* PIC */ {"PNP0100", 0}, /* Timer */ {"", 0}, }; static inline int __init is_exclusive_device(struct acpi_device *dev) { return (!acpi_match_device_ids(dev, excluded_id_list)); } /* * Compatible Device IDs */ #define TEST_HEX(c) \ if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \ return 0 #define TEST_ALPHA(c) \ if (!('A' <= (c) && (c) <= 'Z')) \ return 0 static int __init ispnpidacpi(const char *id) { TEST_ALPHA(id[0]); TEST_ALPHA(id[1]); TEST_ALPHA(id[2]); TEST_HEX(id[3]); TEST_HEX(id[4]); TEST_HEX(id[5]); TEST_HEX(id[6]); if (id[7] != '\0') return 0; return 1; } static int pnpacpi_get_resources(struct pnp_dev *dev) { pnp_dbg(&dev->dev, "get resources\n"); return pnpacpi_parse_allocated_resource(dev); } static int pnpacpi_set_resources(struct pnp_dev *dev) { struct acpi_device *acpi_dev; acpi_handle handle; struct acpi_buffer buffer; int ret; pnp_dbg(&dev->dev, "set resources\n"); handle = DEVICE_ACPI_HANDLE(&dev->dev); if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); return -ENODEV; } if (WARN_ON_ONCE(acpi_dev != dev->data)) dev->data = acpi_dev; ret = pnpacpi_build_resource_template(dev, &buffer); if (ret) return ret; ret = pnpacpi_encode_resources(dev, &buffer); if (ret) { kfree(buffer.pointer); return ret; } if (ACPI_FAILURE(acpi_set_current_resources(handle, &buffer))) ret = -EINVAL; else if (acpi_bus_power_manageable(handle)) ret = acpi_bus_set_power(handle, ACPI_STATE_D0); kfree(buffer.pointer); return ret; } static int pnpacpi_disable_resources(struct pnp_dev *dev) { struct acpi_device *acpi_dev; acpi_handle handle; int ret; dev_dbg(&dev->dev, "disable resources\n"); handle = DEVICE_ACPI_HANDLE(&dev->dev); if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); return 0; } /* acpi_unregister_gsi(pnp_irq(dev, 0)); */ ret = 0; if (acpi_bus_power_manageable(handle)) acpi_bus_set_power(handle, ACPI_STATE_D3_COLD); /* continue even if acpi_bus_set_power() fails */ if (ACPI_FAILURE(acpi_evaluate_object(handle, "_DIS", NULL, NULL))) ret = -ENODEV; return ret; } #ifdef CONFIG_ACPI_SLEEP static bool pnpacpi_can_wakeup(struct pnp_dev *dev) { struct acpi_device *acpi_dev; acpi_handle handle; handle = DEVICE_ACPI_HANDLE(&dev->dev); if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); return false; } return acpi_bus_can_wakeup(handle); } static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state) { struct acpi_device *acpi_dev; acpi_handle handle; int error = 0; handle = DEVICE_ACPI_HANDLE(&dev->dev); if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); return 0; } if (device_can_wakeup(&dev->dev)) { error = acpi_pm_device_sleep_wake(&dev->dev, device_may_wakeup(&dev->dev)); if (error) return error; } if (acpi_bus_power_manageable(handle)) { int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL, ACPI_STATE_D3_COLD); if (power_state < 0) power_state = (state.event == PM_EVENT_ON) ? ACPI_STATE_D0 : ACPI_STATE_D3_COLD; /* * acpi_bus_set_power() often fails (keyboard port can't be * powered-down?), and in any case, our return value is ignored * by pnp_bus_suspend(). Hence we don't revert the wakeup * setting if the set_power fails. */ error = acpi_bus_set_power(handle, power_state); } return error; } static int pnpacpi_resume(struct pnp_dev *dev) { struct acpi_device *acpi_dev; acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev); int error = 0; if (!handle || acpi_bus_get_device(handle, &acpi_dev)) { dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__); return -ENODEV; } if (device_may_wakeup(&dev->dev)) acpi_pm_device_sleep_wake(&dev->dev, false); if (acpi_bus_power_manageable(handle)) error = acpi_bus_set_power(handle, ACPI_STATE_D0); return error; } #endif struct pnp_protocol pnpacpi_protocol = { .name = "Plug and Play ACPI", .get = pnpacpi_get_resources, .set = pnpacpi_set_resources, .disable = pnpacpi_disable_resources, #ifdef CONFIG_ACPI_SLEEP .can_wakeup = pnpacpi_can_wakeup, .suspend = pnpacpi_suspend, .resume = pnpacpi_resume, #endif }; EXPORT_SYMBOL(pnpacpi_protocol); static char *__init pnpacpi_get_id(struct acpi_device *device) { struct acpi_hardware_id *id; list_for_each_entry(id, &device->pnp.ids, list) { if (ispnpidacpi(id->id)) return id->id; } return NULL; } static int __init pnpacpi_add_device(struct acpi_device *device) { struct pnp_dev *dev; char *pnpid; struct acpi_hardware_id *id; /* Skip devices that are already bound */ if (device->physical_node_count) return 0; /* * If a PnPacpi device is not present , the device * driver should not be loaded. */ if (!acpi_has_method(device->handle, "_CRS")) return 0; pnpid = pnpacpi_get_id(device); if (!pnpid) return 0; if (is_exclusive_device(device) || !device->status.present) return 0; dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid); if (!dev) return -ENOMEM; dev->data = device; /* .enabled means the device can decode the resources */ dev->active = device->status.enabled; if (acpi_has_method(device->handle, "_SRS")) dev->capabilities |= PNP_CONFIGURABLE; dev->capabilities |= PNP_READ; if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE)) dev->capabilities |= PNP_WRITE; if (device->flags.removable) dev->capabilities |= PNP_REMOVABLE; if (acpi_has_method(device->handle, "_DIS")) dev->capabilities |= PNP_DISABLE; if (strlen(acpi_device_name(device))) strncpy(dev->name, acpi_device_name(device), sizeof(dev->name)); else strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name)); if (dev->active) pnpacpi_parse_allocated_resource(dev); if (dev->capabilities & PNP_CONFIGURABLE) pnpacpi_parse_resource_option_data(dev); list_for_each_entry(id, &device->pnp.ids, list) { if (!strcmp(id->id, pnpid)) continue; if (!ispnpidacpi(id->id)) continue; pnp_add_id(dev, id->id); } /* clear out the damaged flags */ if (!dev->active) pnp_init_resources(dev); pnp_add_device(dev); num++; return AE_OK; } static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle, u32 lvl, void *context, void **rv) { struct acpi_device *device; if (!acpi_bus_get_device(handle, &device)) pnpacpi_add_device(device); else return AE_CTRL_DEPTH; return AE_OK; } static int __init acpi_pnp_match(struct device *dev, void *_pnp) { struct acpi_device *acpi = to_acpi_device(dev); struct pnp_dev *pnp = _pnp; /* true means it matched */ return !acpi->physical_node_count && compare_pnp_id(pnp->id, acpi_device_hid(acpi)); } static int __init acpi_pnp_find_device(struct device *dev, acpi_handle * handle) { struct device *adev; struct acpi_device *acpi; adev = bus_find_device(&acpi_bus_type, NULL, to_pnp_dev(dev), acpi_pnp_match); if (!adev) return -ENODEV; acpi = to_acpi_device(adev); *handle = acpi->handle; put_device(adev); return 0; } /* complete initialization of a PNPACPI device includes having * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling. */ static bool acpi_pnp_bus_match(struct device *dev) { return dev->bus == &pnp_bus_type; } static struct acpi_bus_type __initdata acpi_pnp_bus = { .name = "PNP", .match = acpi_pnp_bus_match, .find_device = acpi_pnp_find_device, }; int pnpacpi_disabled __initdata; static int __init pnpacpi_init(void) { if (acpi_disabled || pnpacpi_disabled) { printk(KERN_INFO "pnp: PnP ACPI: disabled\n"); return 0; } printk(KERN_INFO "pnp: PnP ACPI init\n"); pnp_register_protocol(&pnpacpi_protocol); register_acpi_bus_type(&acpi_pnp_bus); acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL); printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num); unregister_acpi_bus_type(&acpi_pnp_bus); pnp_platform_devices = 1; return 0; } fs_initcall(pnpacpi_init); static int __init pnpacpi_setup(char *str) { if (str == NULL) return 1; if (!strncmp(str, "off", 3)) pnpacpi_disabled = 1; return 1; } __setup("pnpacpi=", pnpacpi_setup);