diff options
| -rw-r--r-- | drivers/acpi/battery.c | 342 |
1 files changed, 125 insertions, 217 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c index faa70a50b80..db725bfe584 100644 --- a/drivers/acpi/battery.c +++ b/drivers/acpi/battery.c @@ -1,6 +1,8 @@ /* - * acpi_battery.c - ACPI Battery Driver ($Revision: 37 $) + * battery.c - ACPI Battery Driver (Revision: 2.0) * + * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de> + * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com> * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> * @@ -48,6 +50,7 @@ ACPI_MODULE_NAME("battery"); MODULE_AUTHOR("Paul Diefenbaugh"); +MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); MODULE_DESCRIPTION("ACPI Battery Driver"); MODULE_LICENSE("GPL"); @@ -58,31 +61,17 @@ MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); extern struct proc_dir_entry *acpi_lock_battery_dir(void); extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); -static int acpi_battery_add(struct acpi_device *device); -static int acpi_battery_remove(struct acpi_device *device, int type); -static int acpi_battery_resume(struct acpi_device *device); - static const struct acpi_device_id battery_device_ids[] = { {"PNP0C0A", 0}, {"", 0}, }; -MODULE_DEVICE_TABLE(acpi, battery_device_ids); -static struct acpi_driver acpi_battery_driver = { - .name = "battery", - .class = ACPI_BATTERY_CLASS, - .ids = battery_device_ids, - .ops = { - .add = acpi_battery_add, - .resume = acpi_battery_resume, - .remove = acpi_battery_remove, - }, -}; +MODULE_DEVICE_TABLE(acpi, battery_device_ids); enum acpi_battery_files { - ACPI_BATTERY_INFO = 0, - ACPI_BATTERY_STATE, - ACPI_BATTERY_ALARM, + info_tag = 0, + state_tag, + alarm_tag, ACPI_BATTERY_NUMFILES, }; @@ -124,7 +113,6 @@ inline char *acpi_battery_units(struct acpi_battery *battery) /* -------------------------------------------------------------------------- Battery Management -------------------------------------------------------------------------- */ - struct acpi_offsets { size_t offset; /* offset inside struct acpi_sbs_battery */ u8 mode; /* int or string? */ @@ -183,19 +171,16 @@ static int extract_package(struct acpi_battery *battery, static int acpi_battery_get_status(struct acpi_battery *battery) { - int result = 0; - - result = acpi_bus_get_status(battery->device); - if (result) { + if (acpi_bus_get_status(battery->device)) { ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); return -ENODEV; } - return result; + return 0; } static int acpi_battery_get_info(struct acpi_battery *battery) { - int result = 0; + int result = -EFAULT; acpi_status status = 0; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; @@ -205,10 +190,12 @@ static int acpi_battery_get_info(struct acpi_battery *battery) status = acpi_evaluate_object(battery->device->handle, "_BIF", NULL, &buffer); mutex_unlock(&battery->lock); + if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); return -ENODEV; } + result = extract_package(battery, buffer.pointer, info_offsets, ARRAY_SIZE(info_offsets)); kfree(buffer.pointer); @@ -238,6 +225,7 @@ static int acpi_battery_get_state(struct acpi_battery *battery) ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); return -ENODEV; } + result = extract_package(battery, buffer.pointer, state_offsets, ARRAY_SIZE(state_offsets)); battery->update_time = jiffies; @@ -245,37 +233,26 @@ static int acpi_battery_get_state(struct acpi_battery *battery) return result; } -static int acpi_battery_get_alarm(struct acpi_battery *battery) -{ - return 0; -} - -static int acpi_battery_set_alarm(struct acpi_battery *battery, - unsigned long alarm) +static int acpi_battery_set_alarm(struct acpi_battery *battery) { acpi_status status = 0; - union acpi_object arg0 = { ACPI_TYPE_INTEGER }; + union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; struct acpi_object_list arg_list = { 1, &arg0 }; - if (!acpi_battery_present(battery)) - return -ENODEV; - - if (!battery->alarm_present) + if (!acpi_battery_present(battery)|| !battery->alarm_present) return -ENODEV; - arg0.integer.value = alarm; + arg0.integer.value = battery->alarm; mutex_lock(&battery->lock); status = acpi_evaluate_object(battery->device->handle, "_BTP", &arg_list, NULL); mutex_unlock(&battery->lock); + if (ACPI_FAILURE(status)) return -ENODEV; - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", (u32) alarm)); - - battery->alarm = alarm; - + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); return 0; } @@ -293,7 +270,7 @@ static int acpi_battery_init_alarm(struct acpi_battery *battery) battery->alarm_present = 1; if (!battery->alarm) battery->alarm = battery->design_capacity_warning; - return acpi_battery_set_alarm(battery, battery->alarm); + return acpi_battery_set_alarm(battery); } static int acpi_battery_update(struct acpi_battery *battery) @@ -322,130 +299,101 @@ static struct proc_dir_entry *acpi_battery_dir; static int acpi_battery_print_info(struct seq_file *seq, int result) { struct acpi_battery *battery = seq->private; - char *units = "?"; if (result) goto end; - if (acpi_battery_present(battery)) - seq_printf(seq, "present: yes\n"); - else { - seq_printf(seq, "present: no\n"); + seq_printf(seq, "present: %s\n", + acpi_battery_present(battery)?"yes":"no"); + if (!acpi_battery_present(battery)) goto end; - } - - /* Battery Units */ - - units = acpi_battery_units(battery); - if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "design capacity: unknown\n"); else seq_printf(seq, "design capacity: %d %sh\n", - (u32) battery->design_capacity, units); + battery->design_capacity, + acpi_battery_units(battery)); if (battery->last_full_capacity == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "last full capacity: unknown\n"); else seq_printf(seq, "last full capacity: %d %sh\n", - (u32) battery->last_full_capacity, units); - - switch ((u32) battery->technology) { - case 0: - seq_printf(seq, "battery technology: non-rechargeable\n"); - break; - case 1: - seq_printf(seq, "battery technology: rechargeable\n"); - break; - default: - seq_printf(seq, "battery technology: unknown\n"); - break; - } + battery->last_full_capacity, + acpi_battery_units(battery)); + + seq_printf(seq, "battery technology: %srechargeable\n", + (!battery->technology)?"non-":""); if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "design voltage: unknown\n"); else seq_printf(seq, "design voltage: %d mV\n", - (u32) battery->design_voltage); + battery->design_voltage); seq_printf(seq, "design capacity warning: %d %sh\n", - (u32) battery->design_capacity_warning, units); + battery->design_capacity_warning, + acpi_battery_units(battery)); seq_printf(seq, "design capacity low: %d %sh\n", - (u32) battery->design_capacity_low, units); + battery->design_capacity_low, + acpi_battery_units(battery)); seq_printf(seq, "capacity granularity 1: %d %sh\n", - (u32) battery->capacity_granularity_1, units); + battery->capacity_granularity_1, + acpi_battery_units(battery)); seq_printf(seq, "capacity granularity 2: %d %sh\n", - (u32) battery->capacity_granularity_2, units); + battery->capacity_granularity_2, + acpi_battery_units(battery)); seq_printf(seq, "model number: %s\n", battery->model_number); seq_printf(seq, "serial number: %s\n", battery->serial_number); seq_printf(seq, "battery type: %s\n", battery->type); seq_printf(seq, "OEM info: %s\n", battery->oem_info); - end: - if (result) seq_printf(seq, "ERROR: Unable to read battery info\n"); - return result; } static int acpi_battery_print_state(struct seq_file *seq, int result) { struct acpi_battery *battery = seq->private; - char *units = "?"; if (result) goto end; - if (acpi_battery_present(battery)) - seq_printf(seq, "present: yes\n"); - else { - seq_printf(seq, "present: no\n"); + seq_printf(seq, "present: %s\n", + acpi_battery_present(battery)?"yes":"no"); + if (!acpi_battery_present(battery)) goto end; - } - - /* Battery Units */ - - units = acpi_battery_units(battery); - if (!(battery->state & 0x04)) - seq_printf(seq, "capacity state: ok\n"); - else - seq_printf(seq, "capacity state: critical\n"); - - if ((battery->state & 0x01) && (battery->state & 0x02)) { + seq_printf(seq, "capacity state: %s\n", + (battery->state & 0x04)?"critical":"ok"); + if ((battery->state & 0x01) && (battery->state & 0x02)) seq_printf(seq, "charging state: charging/discharging\n"); - } else if (battery->state & 0x01) + else if (battery->state & 0x01) seq_printf(seq, "charging state: discharging\n"); else if (battery->state & 0x02) seq_printf(seq, "charging state: charging\n"); - else { + else seq_printf(seq, "charging state: charged\n"); - } if (battery->present_rate == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "present rate: unknown\n"); else seq_printf(seq, "present rate: %d %s\n", - (u32) battery->present_rate, units); + battery->present_rate, acpi_battery_units(battery)); if (battery->remaining_capacity == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "remaining capacity: unknown\n"); else seq_printf(seq, "remaining capacity: %d %sh\n", - (u32) battery->remaining_capacity, units); - + battery->remaining_capacity, acpi_battery_units(battery)); if (battery->present_voltage == ACPI_BATTERY_VALUE_UNKNOWN) seq_printf(seq, "present voltage: unknown\n"); else seq_printf(seq, "present voltage: %d mV\n", - (u32) battery->present_voltage); - + battery->present_voltage); end: - - if (result) { + if (result) seq_printf(seq, "ERROR: Unable to read battery state\n"); - } return result; } @@ -453,7 +401,6 @@ static int acpi_battery_print_state(struct seq_file *seq, int result) static int acpi_battery_print_alarm(struct seq_file *seq, int result) { struct acpi_battery *battery = seq->private; - char *units = "?"; if (result) goto end; @@ -462,22 +409,15 @@ static int acpi_battery_print_alarm(struct seq_file *seq, int result) seq_printf(seq, "present: no\n"); goto end; } - - /* Battery Units */ - - units = acpi_battery_units(battery); - seq_printf(seq, "alarm: "); if (!battery->alarm) seq_printf(seq, "unsupported\n"); else - seq_printf(seq, "%u %sh\n", battery->alarm, units); - + seq_printf(seq, "%u %sh\n", battery->alarm, + acpi_battery_units(battery)); end: - if (result) seq_printf(seq, "ERROR: Unable to read battery alarm\n"); - return result; } @@ -506,7 +446,7 @@ static ssize_t acpi_battery_write_alarm(struct file *file, } alarm_string[count] = '\0'; battery->alarm = simple_strtol(alarm_string, NULL, 0); - result = acpi_battery_set_alarm(battery, battery->alarm); + result = acpi_battery_set_alarm(battery); end: if (!result) return count; @@ -514,95 +454,76 @@ static ssize_t acpi_battery_write_alarm(struct file *file, } typedef int(*print_func)(struct seq_file *seq, int result); -typedef int(*get_func)(struct acpi_battery *battery); - -static struct acpi_read_mux { - print_func print; - get_func get; -} acpi_read_funcs[ACPI_BATTERY_NUMFILES] = { - {.get = acpi_battery_get_info, .print = acpi_battery_print_info}, - {.get = acpi_battery_get_state, .print = acpi_battery_print_state}, - {.get = acpi_battery_get_alarm, .print = acpi_battery_print_alarm}, + +static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { + acpi_battery_print_info, + acpi_battery_print_state, + acpi_battery_print_alarm, }; static int acpi_battery_read(int fid, struct seq_file *seq) { struct acpi_battery *battery = seq->private; int result = acpi_battery_update(battery); - return acpi_read_funcs[fid].print(seq, result); -} - -static int acpi_battery_read_info(struct seq_file *seq, void *offset) -{ - return acpi_battery_read(ACPI_BATTERY_INFO, seq); -} - -static int acpi_battery_read_state(struct seq_file *seq, void *offset) -{ - return acpi_battery_read(ACPI_BATTERY_STATE, seq); -} - -static int acpi_battery_read_alarm(struct seq_file *seq, void *offset) -{ - return acpi_battery_read(ACPI_BATTERY_ALARM, seq); + return acpi_print_funcs[fid](seq, result); } -static int acpi_battery_info_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_battery_read_info, PDE(inode)->data); +#define DECLARE_FILE_FUNCTIONS(_name) \ +static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ +{ \ + return acpi_battery_read(_name##_tag, seq); \ +} \ +static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ +{ \ + return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ } -static int acpi_battery_state_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_battery_read_state, PDE(inode)->data); -} +DECLARE_FILE_FUNCTIONS(info); +DECLARE_FILE_FUNCTIONS(state); +DECLARE_FILE_FUNCTIONS(alarm); + +#undef DECLARE_FILE_FUNCTIONS + +#define FILE_DESCRIPTION_RO(_name) \ + { \ + .name = __stringify(_name), \ + .mode = S_IRUGO, \ + .ops = { \ + .open = acpi_battery_##_name##_open_fs, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .release = single_release, \ + .owner = THIS_MODULE, \ + }, \ + } -static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file) -{ - return single_open(file, acpi_battery_read_alarm, PDE(inode)->data); -} +#define FILE_DESCRIPTION_RW(_name) \ + { \ + .name = __stringify(_name), \ + .mode = S_IFREG | S_IRUGO | S_IWUSR, \ + .ops = { \ + .open = acpi_battery_##_name##_open_fs, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .write = acpi_battery_write_##_name, \ + .release = single_release, \ + .owner = THIS_MODULE, \ + }, \ + } static struct battery_file { struct file_operations ops; mode_t mode; char *name; } acpi_battery_file[] = { - { - .name = "info", - .mode = S_IRUGO, - .ops = { - .open = acpi_battery_info_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .owner = THIS_MODULE, - }, - }, - { - .name = "state", - .mode = S_IRUGO, - .ops = { - .open = acpi_battery_state_open_fs, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, - .owner = THIS_MODULE, - }, - }, - { - .name = "alarm", - .mode = S_IFREG | S_IRUGO | S_IWUSR, - .ops = { - .open = acpi_battery_alarm_open_fs, - .read = seq_read, - .write = acpi_battery_write_alarm, - .llseek = seq_lseek, - .release = single_release, - .owner = THIS_MODULE, - }, - }, + FILE_DESCRIPTION_RO(info), + FILE_DESCRIPTION_RO(state), + FILE_DESCRIPTION_RW(alarm), }; +#undef FILE_DESCRIPTION_RO +#undef FILE_DESCRIPTION_RW + static int acpi_battery_add_fs(struct acpi_device *device) { struct proc_dir_entry *entry = NULL; @@ -627,23 +548,20 @@ static int acpi_battery_add_fs(struct acpi_device *device) entry->owner = THIS_MODULE; } } - return 0; } -static int acpi_battery_remove_fs(struct acpi_device *device) +static void acpi_battery_remove_fs(struct acpi_device *device) { int i; - if (acpi_device_dir(device)) { - for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { - remove_proc_entry(acpi_battery_file[i].name, + if (!acpi_device_dir(device)) + return; + for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) + remove_proc_entry(acpi_battery_file[i].name, acpi_device_dir(device)); - } - remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); - acpi_device_dir(device) = NULL; - } - return 0; + remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); + acpi_device_dir(device) = NULL; } /* -------------------------------------------------------------------------- @@ -670,14 +588,11 @@ static int acpi_battery_add(struct acpi_device *device) int result = 0; acpi_status status = 0; struct acpi_battery *battery = NULL; - if (!device) return -EINVAL; - battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); if (!battery) return -ENOMEM; - battery->device = device; strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); @@ -687,7 +602,6 @@ static int acpi_battery_add(struct acpi_device *device) result = acpi_battery_add_fs(device); if (result) goto end; - status = acpi_install_notify_handler(device->handle, ACPI_ALL_NOTIFY, acpi_battery_notify, battery); @@ -696,18 +610,14 @@ static int acpi_battery_add(struct acpi_device *device) result = -ENODEV; goto end; } - printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), device->status.battery_present ? "present" : "absent"); - end: - if (result) { acpi_battery_remove_fs(device); kfree(battery); } - return result; } @@ -718,17 +628,13 @@ static int acpi_battery_remove(struct acpi_device *device, int type) if (!device || !acpi_driver_data(device)) return -EINVAL; - battery = acpi_driver_data(device); - status = acpi_remove_notify_handler(device->handle, ACPI_ALL_NOTIFY, acpi_battery_notify); - acpi_battery_remove_fs(device); mutex_destroy(&battery->lock); kfree(battery); - return 0; } @@ -743,33 +649,35 @@ static int acpi_battery_resume(struct acpi_device *device) return 0; } +static struct acpi_driver acpi_battery_driver = { + .name = "battery", + .class = ACPI_BATTERY_CLASS, + .ids = battery_device_ids, + .ops = { + .add = acpi_battery_add, + .resume = acpi_battery_resume, + .remove = acpi_battery_remove, + }, +}; + static int __init acpi_battery_init(void) { - int result; - if (acpi_disabled) return -ENODEV; - acpi_battery_dir = acpi_lock_battery_dir(); if (!acpi_battery_dir) return -ENODEV; - - result = acpi_bus_register_driver(&acpi_battery_driver); - if (result < 0) { + if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { acpi_unlock_battery_dir(acpi_battery_dir); return -ENODEV; } - return 0; } static void __exit acpi_battery_exit(void) { acpi_bus_unregister_driver(&acpi_battery_driver); - acpi_unlock_battery_dir(acpi_battery_dir); - - return; } module_init(acpi_battery_init); |