X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Facpi%2Fbus.c;h=606f8733a776cf4ab3473db6a8288431f7d9bc84;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=4c303e19ebfff70b3bcc739ecea0c95fc8919e27;hpb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;p=linux-2.6.git diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 4c303e19e..606f8733a 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -22,11 +22,13 @@ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ +#include #include #include #include #include #include +#include #include #include #ifdef CONFIG_X86 @@ -35,17 +37,18 @@ #include #include - #define _COMPONENT ACPI_BUS_COMPONENT -ACPI_MODULE_NAME ("acpi_bus") - +ACPI_MODULE_NAME("acpi_bus") #ifdef CONFIG_X86 extern void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger); #endif -FADT_DESCRIPTOR acpi_fadt; -struct acpi_device *acpi_root; -struct proc_dir_entry *acpi_root_dir; +FADT_DESCRIPTOR acpi_fadt; +EXPORT_SYMBOL(acpi_fadt); + +struct acpi_device *acpi_root; +struct proc_dir_entry *acpi_root_dir; +EXPORT_SYMBOL(acpi_root_dir); #define STRUCT_TO_INT(s) (*((int*)&s)) @@ -53,16 +56,9 @@ struct proc_dir_entry *acpi_root_dir; Device Management -------------------------------------------------------------------------- */ -extern void acpi_bus_data_handler ( - acpi_handle handle, - u32 function, - void *context); -int -acpi_bus_get_device ( - acpi_handle handle, - struct acpi_device **device) +int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device) { - acpi_status status = AE_OK; + acpi_status status = AE_OK; ACPI_FUNCTION_TRACE("acpi_bus_get_device"); @@ -71,23 +67,23 @@ acpi_bus_get_device ( /* TBD: Support fixed-feature devices */ - status = acpi_get_data(handle, acpi_bus_data_handler, (void**) device); + status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device); if (ACPI_FAILURE(status) || !*device) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Error getting context for object [%p]\n", - handle)); + ACPI_DEBUG_PRINT((ACPI_DB_WARN, "No context for object [%p]\n", + handle)); return_VALUE(-ENODEV); } return_VALUE(0); } -int -acpi_bus_get_status ( - struct acpi_device *device) +EXPORT_SYMBOL(acpi_bus_get_device); + +int acpi_bus_get_status(struct acpi_device *device) { - acpi_status status = AE_OK; - unsigned long sta = 0; - + acpi_status status = AE_OK; + unsigned long sta = 0; + ACPI_FUNCTION_TRACE("acpi_bus_get_status"); if (!device) @@ -97,10 +93,11 @@ acpi_bus_get_status ( * Evaluate _STA if present. */ if (device->flags.dynamic_status) { - status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); + status = + acpi_evaluate_integer(device->handle, "_STA", NULL, &sta); if (ACPI_FAILURE(status)) return_VALUE(-ENODEV); - STRUCT_TO_INT(device->status) = (int) sta; + STRUCT_TO_INT(device->status) = (int)sta; } /* @@ -114,32 +111,30 @@ acpi_bus_get_status ( if (device->status.functional && !device->status.present) { printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " - "functional but not present; setting present\n", - device->pnp.bus_id, - (u32) STRUCT_TO_INT(device->status)); + "functional but not present; setting present\n", + device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); device->status.present = 1; } - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", - device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status))); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", + device->pnp.bus_id, + (u32) STRUCT_TO_INT(device->status))); return_VALUE(0); } +EXPORT_SYMBOL(acpi_bus_get_status); /* -------------------------------------------------------------------------- Power Management -------------------------------------------------------------------------- */ -int -acpi_bus_get_power ( - acpi_handle handle, - int *state) +int acpi_bus_get_power(acpi_handle handle, int *state) { - int result = 0; - acpi_status status = 0; - struct acpi_device *device = NULL; - unsigned long psc = 0; + int result = 0; + acpi_status status = 0; + struct acpi_device *device = NULL; + unsigned long psc = 0; ACPI_FUNCTION_TRACE("acpi_bus_get_power"); @@ -155,20 +150,18 @@ acpi_bus_get_power ( *state = device->parent->power.state; else *state = ACPI_STATE_D0; - } - else { + } else { /* * Get the device's power state either directly (via _PSC) or * indirectly (via power resources). */ if (device->power.flags.explicit_get) { - status = acpi_evaluate_integer(device->handle, "_PSC", - NULL, &psc); + status = acpi_evaluate_integer(device->handle, "_PSC", + NULL, &psc); if (ACPI_FAILURE(status)) return_VALUE(-ENODEV); - device->power.state = (int) psc; - } - else if (device->power.flags.power_resources) { + device->power.state = (int)psc; + } else if (device->power.flags.power_resources) { result = acpi_power_get_inferred_state(device); if (result) return_VALUE(result); @@ -178,21 +171,19 @@ acpi_bus_get_power ( } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n", - device->pnp.bus_id, device->power.state)); + device->pnp.bus_id, device->power.state)); return_VALUE(0); } +EXPORT_SYMBOL(acpi_bus_get_power); -int -acpi_bus_set_power ( - acpi_handle handle, - int state) +int acpi_bus_set_power(acpi_handle handle, int state) { - int result = 0; - acpi_status status = AE_OK; - struct acpi_device *device = NULL; - char object_name[5] = {'_','P','S','0'+state,'\0'}; + int result = 0; + acpi_status status = AE_OK; + struct acpi_device *device = NULL; + char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; ACPI_FUNCTION_TRACE("acpi_bus_set_power"); @@ -206,19 +197,29 @@ acpi_bus_set_power ( /* Make sure this is a valid target state */ if (!device->flags.power_manageable) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device is not power manageable\n")); + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Device is not power manageable\n")); return_VALUE(-ENODEV); } + /* + * Get device's current power state if it's unknown + * This means device power state isn't initialized or previous setting failed + */ + if (device->power.state == ACPI_STATE_UNKNOWN) + acpi_bus_get_power(device->handle, &device->power.state); if (state == device->power.state) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", + state)); return_VALUE(0); } if (!device->power.states[state].flags.valid) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device does not support D%d\n", state)); + ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Device does not support D%d\n", + state)); return_VALUE(-ENODEV); } if (device->parent && (state < device->parent->power.state)) { - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Cannot set device to a higher-powered state than parent\n")); + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Cannot set device to a higher-powered state than parent\n")); return_VALUE(-ENODEV); } @@ -228,7 +229,7 @@ acpi_bus_set_power ( * On transitions to a high-powered state we first apply power (via * power resources) then evalute _PSx. Conversly for transitions to * a lower-powered state. - */ + */ if (state < device->power.state) { if (device->power.flags.power_resources) { result = acpi_power_transition(device, state); @@ -236,18 +237,17 @@ acpi_bus_set_power ( goto end; } if (device->power.states[state].flags.explicit_set) { - status = acpi_evaluate_object(device->handle, - object_name, NULL, NULL); + status = acpi_evaluate_object(device->handle, + object_name, NULL, NULL); if (ACPI_FAILURE(status)) { result = -ENODEV; goto end; } } - } - else { + } else { if (device->power.states[state].flags.explicit_set) { - status = acpi_evaluate_object(device->handle, - object_name, NULL, NULL); + status = acpi_evaluate_object(device->handle, + object_name, NULL, NULL); if (ACPI_FAILURE(status)) { result = -ENODEV; goto end; @@ -260,38 +260,36 @@ acpi_bus_set_power ( } } -end: + end: if (result) - ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Error transitioning device [%s] to D%d\n", - device->pnp.bus_id, state)); + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Error transitioning device [%s] to D%d\n", + device->pnp.bus_id, state)); else - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] transitioned to D%d\n", - device->pnp.bus_id, state)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Device [%s] transitioned to D%d\n", + device->pnp.bus_id, state)); return_VALUE(result); } - +EXPORT_SYMBOL(acpi_bus_set_power); /* -------------------------------------------------------------------------- Event Management -------------------------------------------------------------------------- */ -static spinlock_t acpi_bus_event_lock = SPIN_LOCK_UNLOCKED; +static DEFINE_SPINLOCK(acpi_bus_event_lock); LIST_HEAD(acpi_bus_event_list); DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue); -extern int event_is_open; +extern int event_is_open; -int -acpi_bus_generate_event ( - struct acpi_device *device, - u8 type, - int data) +int acpi_bus_generate_event(struct acpi_device *device, u8 type, int data) { - struct acpi_bus_event *event = NULL; - unsigned long flags = 0; + struct acpi_bus_event *event = NULL; + unsigned long flags = 0; ACPI_FUNCTION_TRACE("acpi_bus_generate_event"); @@ -320,19 +318,19 @@ acpi_bus_generate_event ( return_VALUE(0); } -int -acpi_bus_receive_event ( - struct acpi_bus_event *event) +EXPORT_SYMBOL(acpi_bus_generate_event); + +int acpi_bus_receive_event(struct acpi_bus_event *event) { - unsigned long flags = 0; - struct acpi_bus_event *entry = NULL; + unsigned long flags = 0; + struct acpi_bus_event *entry = NULL; DECLARE_WAITQUEUE(wait, current); ACPI_FUNCTION_TRACE("acpi_bus_receive_event"); if (!event) - return -EINVAL; + return_VALUE(-EINVAL); if (list_empty(&acpi_bus_event_list)) { @@ -350,7 +348,8 @@ acpi_bus_receive_event ( } spin_lock_irqsave(&acpi_bus_event_lock, flags); - entry = list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); + entry = + list_entry(acpi_bus_event_list.next, struct acpi_bus_event, node); if (entry) list_del(&entry->node); spin_unlock_irqrestore(&acpi_bus_event_lock, flags); @@ -365,17 +364,16 @@ acpi_bus_receive_event ( return_VALUE(0); } +EXPORT_SYMBOL(acpi_bus_receive_event); /* -------------------------------------------------------------------------- Notification Handling -------------------------------------------------------------------------- */ static int -acpi_bus_check_device ( - struct acpi_device *device, - int *status_changed) +acpi_bus_check_device(struct acpi_device *device, int *status_changed) { - acpi_status status = 0; + acpi_status status = 0; struct acpi_device_status old_status; ACPI_FUNCTION_TRACE("acpi_bus_check_device"); @@ -410,15 +408,14 @@ acpi_bus_check_device ( if (status_changed) *status_changed = 1; - + /* * Device Insertion/Removal */ if ((device->status.present) && !(old_status.present)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n")); /* TBD: Handle device insertion */ - } - else if (!(device->status.present) && (old_status.present)) { + } else if (!(device->status.present) && (old_status.present)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n")); /* TBD: Handle device removal */ } @@ -426,13 +423,10 @@ acpi_bus_check_device ( return_VALUE(0); } - -static int -acpi_bus_check_scope ( - struct acpi_device *device) +static int acpi_bus_check_scope(struct acpi_device *device) { - int result = 0; - int status_changed = 0; + int result = 0; + int status_changed = 0; ACPI_FUNCTION_TRACE("acpi_bus_check_scope"); @@ -455,20 +449,15 @@ acpi_bus_check_scope ( return_VALUE(0); } - /** * acpi_bus_notify * --------------- * Callback for all 'system-level' device notifications (values 0x00-0x7F). */ -static void -acpi_bus_notify ( - acpi_handle handle, - u32 type, - void *data) +static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) { - int result = 0; - struct acpi_device *device = NULL; + int result = 0; + struct acpi_device *device = NULL; ACPI_FUNCTION_TRACE("acpi_bus_notify"); @@ -478,64 +467,73 @@ acpi_bus_notify ( switch (type) { case ACPI_NOTIFY_BUS_CHECK: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received BUS CHECK notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received BUS CHECK notification for device [%s]\n", + device->pnp.bus_id)); result = acpi_bus_check_scope(device); /* * TBD: We'll need to outsource certain events to non-ACPI - * drivers via the device manager (device.c). + * drivers via the device manager (device.c). */ break; case ACPI_NOTIFY_DEVICE_CHECK: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE CHECK notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received DEVICE CHECK notification for device [%s]\n", + device->pnp.bus_id)); result = acpi_bus_check_device(device, NULL); /* * TBD: We'll need to outsource certain events to non-ACPI - * drivers via the device manager (device.c). + * drivers via the device manager (device.c). */ break; case ACPI_NOTIFY_DEVICE_WAKE: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE WAKE notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received DEVICE WAKE notification for device [%s]\n", + device->pnp.bus_id)); /* TBD */ break; case ACPI_NOTIFY_EJECT_REQUEST: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received EJECT REQUEST notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received EJECT REQUEST notification for device [%s]\n", + device->pnp.bus_id)); /* TBD */ break; case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received DEVICE CHECK LIGHT notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received DEVICE CHECK LIGHT notification for device [%s]\n", + device->pnp.bus_id)); /* TBD: Exactly what does 'light' mean? */ break; case ACPI_NOTIFY_FREQUENCY_MISMATCH: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received FREQUENCY MISMATCH notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received FREQUENCY MISMATCH notification for device [%s]\n", + device->pnp.bus_id)); /* TBD */ break; case ACPI_NOTIFY_BUS_MODE_MISMATCH: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received BUS MODE MISMATCH notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received BUS MODE MISMATCH notification for device [%s]\n", + device->pnp.bus_id)); /* TBD */ break; case ACPI_NOTIFY_POWER_FAULT: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received POWER FAULT notification for device [%s]\n", - device->pnp.bus_id)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received POWER FAULT notification for device [%s]\n", + device->pnp.bus_id)); /* TBD */ break; default: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Received unknown/unsupported notification [%08x]\n", - type)); + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Received unknown/unsupported notification [%08x]\n", + type)); break; } @@ -546,13 +544,12 @@ acpi_bus_notify ( Initialization/Cleanup -------------------------------------------------------------------------- */ -static int __init -acpi_bus_init_irq (void) +static int __init acpi_bus_init_irq(void) { - acpi_status status = AE_OK; - union acpi_object arg = {ACPI_TYPE_INTEGER}; - struct acpi_object_list arg_list = {1, &arg}; - char *message = NULL; + acpi_status status = AE_OK; + union acpi_object arg = { ACPI_TYPE_INTEGER }; + struct acpi_object_list arg_list = { 1, &arg }; + char *message = NULL; ACPI_FUNCTION_TRACE("acpi_bus_init_irq"); @@ -589,17 +586,15 @@ acpi_bus_init_irq (void) return_VALUE(0); } - -void __init -acpi_early_init (void) +void __init acpi_early_init(void) { - acpi_status status = AE_OK; - struct acpi_buffer buffer = {sizeof(acpi_fadt), &acpi_fadt}; + acpi_status status = AE_OK; + struct acpi_buffer buffer = { sizeof(acpi_fadt), &acpi_fadt }; ACPI_FUNCTION_TRACE("acpi_early_init"); if (acpi_disabled) - return; + return_VOID; /* enable workarounds, unless strict ACPI spec. compliance */ if (!acpi_strict) @@ -607,13 +602,15 @@ acpi_early_init (void) status = acpi_initialize_subsystem(); if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Unable to initialize the ACPI Interpreter\n"); + printk(KERN_ERR PREFIX + "Unable to initialize the ACPI Interpreter\n"); goto error0; } status = acpi_load_tables(); if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Unable to load the System Description Tables\n"); + printk(KERN_ERR PREFIX + "Unable to load the System Description Tables\n"); goto error0; } @@ -625,7 +622,6 @@ acpi_early_init (void) printk(KERN_ERR PREFIX "Unable to get the FADT\n"); goto error0; } - #ifdef CONFIG_X86 if (!acpi_ioapic) { extern acpi_interrupt_flags acpi_sci_flags; @@ -635,7 +631,8 @@ acpi_early_init (void) acpi_sci_flags.trigger = 3; /* Set PIC-mode SCI trigger type */ - acpi_pic_sci_set_trigger(acpi_fadt.sci_int, acpi_sci_flags.trigger); + acpi_pic_sci_set_trigger(acpi_fadt.sci_int, + acpi_sci_flags.trigger); } else { extern int acpi_sci_override_gsi; /* @@ -646,38 +643,43 @@ acpi_early_init (void) } #endif - status = acpi_enable_subsystem(~(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE)); + status = + acpi_enable_subsystem(~ + (ACPI_NO_HARDWARE_INIT | + ACPI_NO_ACPI_ENABLE)); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); goto error0; } - return; + return_VOID; -error0: + error0: disable_acpi(); - return; + return_VOID; } -static int __init -acpi_bus_init (void) +static int __init acpi_bus_init(void) { - int result = 0; - acpi_status status = AE_OK; - extern acpi_status acpi_os_initialize1(void); + int result = 0; + acpi_status status = AE_OK; + extern acpi_status acpi_os_initialize1(void); ACPI_FUNCTION_TRACE("acpi_bus_init"); status = acpi_os_initialize1(); - status = acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); + status = + acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Unable to start the ACPI Interpreter\n"); + printk(KERN_ERR PREFIX + "Unable to start the ACPI Interpreter\n"); goto error1; } if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Unable to initialize ACPI OS objects\n"); + printk(KERN_ERR PREFIX + "Unable to initialize ACPI OS objects\n"); goto error1; } #ifdef CONFIG_ACPI_EC @@ -711,9 +713,12 @@ acpi_bus_init (void) /* * Register the for all standard device notifications. */ - status = acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, &acpi_bus_notify, NULL); + status = + acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, + &acpi_bus_notify, NULL); if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Unable to register for device notifications\n"); + printk(KERN_ERR PREFIX + "Unable to register for device notifications\n"); goto error1; } @@ -725,25 +730,24 @@ acpi_bus_init (void) return_VALUE(0); /* Mimic structured exception handling */ -error1: + error1: acpi_terminate(); return_VALUE(-ENODEV); } -decl_subsys(acpi,NULL,NULL); +decl_subsys(acpi, NULL, NULL); -static int __init acpi_init (void) +static int __init acpi_init(void) { - int result = 0; + int result = 0; ACPI_FUNCTION_TRACE("acpi_init"); - printk(KERN_INFO PREFIX "Subsystem revision %08x\n", - ACPI_CA_VERSION); + printk(KERN_INFO PREFIX "Subsystem revision %08x\n", ACPI_CA_VERSION); if (acpi_disabled) { printk(KERN_INFO PREFIX "Interpreter disabled.\n"); - return -ENODEV; + return_VALUE(-ENODEV); } firmware_register(&acpi_subsys); @@ -751,11 +755,12 @@ static int __init acpi_init (void) result = acpi_bus_init(); if (!result) { -#ifdef CONFIG_PM +#ifdef CONFIG_PM_LEGACY if (!PM_IS_ACTIVE()) pm_active = 1; else { - printk(KERN_INFO PREFIX "APM is already active, exiting\n"); + printk(KERN_INFO PREFIX + "APM is already active, exiting\n"); disable_acpi(); result = -ENODEV; }