Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * scan.c - support for transforming the ACPI namespace into individual objects |
| 3 | */ |
| 4 | |
| 5 | #include <linux/module.h> |
| 6 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 7 | #include <linux/slab.h> |
Randy Dunlap | 9b6d97b | 2006-07-12 02:08:00 -0400 | [diff] [blame] | 8 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | #include <linux/acpi.h> |
Alok N Kataria | 74523c9 | 2008-06-13 12:54:24 -0400 | [diff] [blame] | 10 | #include <linux/signal.h> |
| 11 | #include <linux/kthread.h> |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 12 | #include <linux/dmi.h> |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 13 | #include <linux/nls.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
| 15 | #include <acpi/acpi_drivers.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 17 | #include "internal.h" |
| 18 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 20 | ACPI_MODULE_NAME("scan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 22 | extern struct acpi_device *acpi_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #define ACPI_BUS_CLASS "system_bus" |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
| 27 | |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
| 29 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 30 | static const char *dummy_hid = "device"; |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | static LIST_HEAD(acpi_device_list); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 33 | static LIST_HEAD(acpi_bus_id_list); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 34 | static DEFINE_MUTEX(acpi_scan_lock); |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 35 | static LIST_HEAD(acpi_scan_handlers_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 36 | DEFINE_MUTEX(acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | LIST_HEAD(acpi_wakeup_device_list); |
| 38 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 39 | struct acpi_device_bus_id{ |
Zhang Rui | bb09585 | 2007-01-04 15:03:18 +0800 | [diff] [blame] | 40 | char bus_id[15]; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 41 | unsigned int instance_no; |
| 42 | struct list_head node; |
| 43 | }; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 44 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 45 | int acpi_scan_add_handler(struct acpi_scan_handler *handler) |
| 46 | { |
| 47 | if (!handler || !handler->attach) |
| 48 | return -EINVAL; |
| 49 | |
| 50 | list_add_tail(&handler->list_node, &acpi_scan_handlers_list); |
| 51 | return 0; |
| 52 | } |
| 53 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 54 | /* |
| 55 | * Creates hid/cid(s) string needed for modalias and uevent |
| 56 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 57 | * char *modalias: "acpi:IBM0001:ACPI0001" |
| 58 | */ |
Adrian Bunk | b3e572d | 2007-08-14 23:22:35 +0200 | [diff] [blame] | 59 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
| 60 | int size) |
| 61 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 62 | int len; |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 63 | int count; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 64 | struct acpi_hardware_id *id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 65 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 66 | if (list_empty(&acpi_dev->pnp.ids)) |
| 67 | return 0; |
| 68 | |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 69 | len = snprintf(modalias, size, "acpi:"); |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 70 | size -= len; |
| 71 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 72 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
| 73 | count = snprintf(&modalias[len], size, "%s:", id->id); |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 74 | if (count < 0 || count >= size) |
| 75 | return -EINVAL; |
| 76 | len += count; |
| 77 | size -= count; |
| 78 | } |
| 79 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 80 | modalias[len] = '\0'; |
| 81 | return len; |
| 82 | } |
| 83 | |
| 84 | static ssize_t |
| 85 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 86 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 87 | int len; |
| 88 | |
| 89 | /* Device has no HID and no CID or string is >1024 */ |
| 90 | len = create_modalias(acpi_dev, buf, 1024); |
| 91 | if (len <= 0) |
| 92 | return 0; |
| 93 | buf[len++] = '\n'; |
| 94 | return len; |
| 95 | } |
| 96 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); |
| 97 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 98 | /** |
| 99 | * acpi_bus_hot_remove_device: hot-remove a device and its children |
| 100 | * @context: struct acpi_eject_event pointer (freed in this func) |
| 101 | * |
| 102 | * Hot-remove a device and its children. This function frees up the |
| 103 | * memory space passed by arg context, so that the caller may call |
| 104 | * this function asynchronously through acpi_os_hotplug_execute(). |
| 105 | */ |
| 106 | void acpi_bus_hot_remove_device(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | { |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 108 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 109 | struct acpi_device *device = ej_event->device; |
| 110 | acpi_handle handle = device->handle; |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 111 | acpi_handle temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | struct acpi_object_list arg_list; |
| 113 | union acpi_object arg; |
| 114 | acpi_status status = AE_OK; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 115 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 117 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 118 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 119 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 120 | acpi_bus_trim(device); |
| 121 | /* Device node has been released. */ |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 122 | device = NULL; |
| 123 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 124 | /* power off device */ |
| 125 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); |
| 126 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 127 | printk(KERN_WARNING PREFIX |
| 128 | "Power-off device failed\n"); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 129 | |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 130 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | arg_list.count = 1; |
| 132 | arg_list.pointer = &arg; |
| 133 | arg.type = ACPI_TYPE_INTEGER; |
| 134 | arg.integer.value = 0; |
| 135 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); |
| 136 | } |
| 137 | |
| 138 | arg_list.count = 1; |
| 139 | arg_list.pointer = &arg; |
| 140 | arg.type = ACPI_TYPE_INTEGER; |
| 141 | arg.integer.value = 1; |
| 142 | |
| 143 | /* |
| 144 | * TBD: _EJD support. |
| 145 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 147 | if (ACPI_FAILURE(status)) { |
| 148 | if (status != AE_NOT_FOUND) |
| 149 | printk(KERN_WARNING PREFIX |
| 150 | "Eject device failed\n"); |
| 151 | goto err_out; |
| 152 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 154 | kfree(context); |
| 155 | return; |
| 156 | |
| 157 | err_out: |
| 158 | /* Inform firmware the hot-remove operation has completed w/ error */ |
| 159 | (void) acpi_evaluate_hotplug_ost(handle, |
| 160 | ej_event->event, ost_code, NULL); |
| 161 | kfree(context); |
Zhang Rui | c8d72a5 | 2009-06-22 11:31:16 +0800 | [diff] [blame] | 162 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | } |
Toshi Kani | 61622ac | 2012-11-01 14:42:12 +0000 | [diff] [blame] | 164 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 166 | static ssize_t real_power_state_show(struct device *dev, |
| 167 | struct device_attribute *attr, char *buf) |
| 168 | { |
| 169 | struct acpi_device *adev = to_acpi_device(dev); |
| 170 | int state; |
| 171 | int ret; |
| 172 | |
| 173 | ret = acpi_device_get_power(adev, &state); |
| 174 | if (ret) |
| 175 | return ret; |
| 176 | |
| 177 | return sprintf(buf, "%s\n", acpi_power_state_string(state)); |
| 178 | } |
| 179 | |
| 180 | static DEVICE_ATTR(real_power_state, 0444, real_power_state_show, NULL); |
| 181 | |
| 182 | static ssize_t power_state_show(struct device *dev, |
| 183 | struct device_attribute *attr, char *buf) |
| 184 | { |
| 185 | struct acpi_device *adev = to_acpi_device(dev); |
| 186 | |
| 187 | return sprintf(buf, "%s\n", acpi_power_state_string(adev->power.state)); |
| 188 | } |
| 189 | |
| 190 | static DEVICE_ATTR(power_state, 0444, power_state_show, NULL); |
| 191 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | static ssize_t |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 193 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
| 194 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 196 | int ret = count; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 197 | acpi_status status; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 198 | acpi_object_type type = 0; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 199 | struct acpi_device *acpi_device = to_acpi_device(d); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 200 | struct acpi_eject_event *ej_event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | if ((!count) || (buf[0] != '1')) { |
| 203 | return -EINVAL; |
| 204 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | #ifndef FORCE_EJECT |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 206 | if (acpi_device->driver == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | ret = -ENODEV; |
| 208 | goto err; |
| 209 | } |
| 210 | #endif |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 211 | status = acpi_get_type(acpi_device->handle, &type); |
| 212 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | ret = -ENODEV; |
| 214 | goto err; |
| 215 | } |
| 216 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 217 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
| 218 | if (!ej_event) { |
| 219 | ret = -ENOMEM; |
| 220 | goto err; |
| 221 | } |
| 222 | |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 223 | ej_event->device = acpi_device; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 224 | if (acpi_device->flags.eject_pending) { |
| 225 | /* event originated from ACPI eject notification */ |
| 226 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; |
| 227 | acpi_device->flags.eject_pending = 0; |
| 228 | } else { |
| 229 | /* event originated from user */ |
| 230 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 231 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 232 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
| 233 | } |
| 234 | |
| 235 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); |
Alok N Kataria | 74523c9 | 2008-06-13 12:54:24 -0400 | [diff] [blame] | 236 | err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | } |
| 239 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 240 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 242 | static ssize_t |
| 243 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 244 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
Bjorn Helgaas | ea8d82f | 2009-09-21 13:35:09 -0600 | [diff] [blame] | 246 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 247 | } |
| 248 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
| 249 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 250 | static ssize_t acpi_device_uid_show(struct device *dev, |
| 251 | struct device_attribute *attr, char *buf) |
| 252 | { |
| 253 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 254 | |
| 255 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); |
| 256 | } |
| 257 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); |
| 258 | |
| 259 | static ssize_t acpi_device_adr_show(struct device *dev, |
| 260 | struct device_attribute *attr, char *buf) |
| 261 | { |
| 262 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 263 | |
| 264 | return sprintf(buf, "0x%08x\n", |
| 265 | (unsigned int)(acpi_dev->pnp.bus_address)); |
| 266 | } |
| 267 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); |
| 268 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 269 | static ssize_t |
| 270 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 271 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 272 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 273 | int result; |
| 274 | |
| 275 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 276 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 277 | goto end; |
| 278 | |
| 279 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
| 280 | kfree(path.pointer); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 281 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 282 | return result; |
| 283 | } |
| 284 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
| 285 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 286 | /* sysfs file that shows description text from the ACPI _STR method */ |
| 287 | static ssize_t description_show(struct device *dev, |
| 288 | struct device_attribute *attr, |
| 289 | char *buf) { |
| 290 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 291 | int result; |
| 292 | |
| 293 | if (acpi_dev->pnp.str_obj == NULL) |
| 294 | return 0; |
| 295 | |
| 296 | /* |
| 297 | * The _STR object contains a Unicode identifier for a device. |
| 298 | * We need to convert to utf-8 so it can be displayed. |
| 299 | */ |
| 300 | result = utf16s_to_utf8s( |
| 301 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, |
| 302 | acpi_dev->pnp.str_obj->buffer.length, |
| 303 | UTF16_LITTLE_ENDIAN, buf, |
| 304 | PAGE_SIZE); |
| 305 | |
| 306 | buf[result++] = '\n'; |
| 307 | |
| 308 | return result; |
| 309 | } |
| 310 | static DEVICE_ATTR(description, 0444, description_show, NULL); |
| 311 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 312 | static ssize_t |
| 313 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, |
| 314 | char *buf) { |
| 315 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 316 | |
| 317 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); |
| 318 | } |
| 319 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); |
| 320 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 321 | static int acpi_device_setup_files(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | { |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 323 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 324 | acpi_status status; |
| 325 | acpi_handle temp; |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 326 | unsigned long long sun; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 327 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 329 | /* |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 330 | * Devices gotten from FADT don't have a "path" attribute |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 331 | */ |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 332 | if (dev->handle) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 333 | result = device_create_file(&dev->dev, &dev_attr_path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 334 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 335 | goto end; |
| 336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 338 | if (!list_empty(&dev->pnp.ids)) { |
| 339 | result = device_create_file(&dev->dev, &dev_attr_hid); |
| 340 | if (result) |
| 341 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 343 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
| 344 | if (result) |
| 345 | goto end; |
| 346 | } |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 347 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 348 | /* |
| 349 | * If device has _STR, 'description' file is created |
| 350 | */ |
| 351 | status = acpi_get_handle(dev->handle, "_STR", &temp); |
| 352 | if (ACPI_SUCCESS(status)) { |
| 353 | status = acpi_evaluate_object(dev->handle, "_STR", |
| 354 | NULL, &buffer); |
| 355 | if (ACPI_FAILURE(status)) |
| 356 | buffer.pointer = NULL; |
| 357 | dev->pnp.str_obj = buffer.pointer; |
| 358 | result = device_create_file(&dev->dev, &dev_attr_description); |
| 359 | if (result) |
| 360 | goto end; |
| 361 | } |
| 362 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 363 | if (dev->flags.bus_address) |
| 364 | result = device_create_file(&dev->dev, &dev_attr_adr); |
| 365 | if (dev->pnp.unique_id) |
| 366 | result = device_create_file(&dev->dev, &dev_attr_uid); |
| 367 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 368 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
| 369 | if (ACPI_SUCCESS(status)) { |
| 370 | dev->pnp.sun = (unsigned long)sun; |
| 371 | result = device_create_file(&dev->dev, &dev_attr_sun); |
| 372 | if (result) |
| 373 | goto end; |
| 374 | } else { |
| 375 | dev->pnp.sun = (unsigned long)-1; |
| 376 | } |
| 377 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 378 | /* |
| 379 | * If device has _EJ0, 'eject' file is created that is used to trigger |
| 380 | * hot-removal function from userland. |
| 381 | */ |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 382 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 383 | if (ACPI_SUCCESS(status)) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 384 | result = device_create_file(&dev->dev, &dev_attr_eject); |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 385 | if (result) |
| 386 | return result; |
| 387 | } |
| 388 | |
| 389 | if (dev->flags.power_manageable) { |
| 390 | result = device_create_file(&dev->dev, &dev_attr_power_state); |
| 391 | if (result) |
| 392 | return result; |
| 393 | |
| 394 | if (dev->power.flags.power_resources) |
| 395 | result = device_create_file(&dev->dev, |
| 396 | &dev_attr_real_power_state); |
| 397 | } |
| 398 | |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 399 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 400 | return result; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 401 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 403 | static void acpi_device_remove_files(struct acpi_device *dev) |
| 404 | { |
| 405 | acpi_status status; |
| 406 | acpi_handle temp; |
| 407 | |
Rafael J. Wysocki | 836aedb | 2013-01-24 12:49:59 +0100 | [diff] [blame] | 408 | if (dev->flags.power_manageable) { |
| 409 | device_remove_file(&dev->dev, &dev_attr_power_state); |
| 410 | if (dev->power.flags.power_resources) |
| 411 | device_remove_file(&dev->dev, |
| 412 | &dev_attr_real_power_state); |
| 413 | } |
| 414 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 415 | /* |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 416 | * If device has _STR, remove 'description' file |
| 417 | */ |
| 418 | status = acpi_get_handle(dev->handle, "_STR", &temp); |
| 419 | if (ACPI_SUCCESS(status)) { |
| 420 | kfree(dev->pnp.str_obj); |
| 421 | device_remove_file(&dev->dev, &dev_attr_description); |
| 422 | } |
| 423 | /* |
| 424 | * If device has _EJ0, remove 'eject' file. |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 425 | */ |
| 426 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
| 427 | if (ACPI_SUCCESS(status)) |
| 428 | device_remove_file(&dev->dev, &dev_attr_eject); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 429 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 430 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
| 431 | if (ACPI_SUCCESS(status)) |
| 432 | device_remove_file(&dev->dev, &dev_attr_sun); |
| 433 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 434 | if (dev->pnp.unique_id) |
| 435 | device_remove_file(&dev->dev, &dev_attr_uid); |
| 436 | if (dev->flags.bus_address) |
| 437 | device_remove_file(&dev->dev, &dev_attr_adr); |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 438 | device_remove_file(&dev->dev, &dev_attr_modalias); |
| 439 | device_remove_file(&dev->dev, &dev_attr_hid); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 440 | if (dev->handle) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 441 | device_remove_file(&dev->dev, &dev_attr_path); |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 442 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* -------------------------------------------------------------------------- |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 444 | ACPI Bus operations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | -------------------------------------------------------------------------- */ |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 446 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 447 | static const struct acpi_device_id *__acpi_match_device( |
| 448 | struct acpi_device *device, const struct acpi_device_id *ids) |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 449 | { |
| 450 | const struct acpi_device_id *id; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 451 | struct acpi_hardware_id *hwid; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 452 | |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 453 | /* |
| 454 | * If the device is not present, it is unnecessary to load device |
| 455 | * driver for it. |
| 456 | */ |
| 457 | if (!device->status.present) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 458 | return NULL; |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 459 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 460 | for (id = ids; id->id[0]; id++) |
| 461 | list_for_each_entry(hwid, &device->pnp.ids, list) |
| 462 | if (!strcmp((char *) id->id, hwid->id)) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 463 | return id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 464 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 465 | return NULL; |
| 466 | } |
| 467 | |
| 468 | /** |
| 469 | * acpi_match_device - Match a struct device against a given list of ACPI IDs |
| 470 | * @ids: Array of struct acpi_device_id object to match against. |
| 471 | * @dev: The device structure to match. |
| 472 | * |
| 473 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device |
| 474 | * object for that handle and use that object to match against a given list of |
| 475 | * device IDs. |
| 476 | * |
| 477 | * Return a pointer to the first matching ID on success or %NULL on failure. |
| 478 | */ |
| 479 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, |
| 480 | const struct device *dev) |
| 481 | { |
| 482 | struct acpi_device *adev; |
| 483 | |
Rafael J. Wysocki | 95f8a08 | 2012-11-21 00:21:50 +0100 | [diff] [blame] | 484 | if (!ids || !ACPI_HANDLE(dev) |
| 485 | || ACPI_FAILURE(acpi_bus_get_device(ACPI_HANDLE(dev), &adev))) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 486 | return NULL; |
| 487 | |
| 488 | return __acpi_match_device(adev, ids); |
| 489 | } |
| 490 | EXPORT_SYMBOL_GPL(acpi_match_device); |
| 491 | |
| 492 | int acpi_match_device_ids(struct acpi_device *device, |
| 493 | const struct acpi_device_id *ids) |
| 494 | { |
| 495 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 496 | } |
| 497 | EXPORT_SYMBOL(acpi_match_device_ids); |
| 498 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 499 | void acpi_free_ids(struct acpi_device *device) |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 500 | { |
| 501 | struct acpi_hardware_id *id, *tmp; |
| 502 | |
| 503 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { |
| 504 | kfree(id->id); |
| 505 | kfree(id); |
| 506 | } |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 507 | kfree(device->pnp.unique_id); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 508 | } |
| 509 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 510 | static void acpi_free_power_resources_lists(struct acpi_device *device) |
| 511 | { |
| 512 | int i; |
| 513 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 514 | if (device->wakeup.flags.valid) |
| 515 | acpi_power_resources_list_free(&device->wakeup.resources); |
| 516 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 517 | if (!device->flags.power_manageable) |
| 518 | return; |
| 519 | |
| 520 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
| 521 | struct acpi_device_power_state *ps = &device->power.states[i]; |
| 522 | acpi_power_resources_list_free(&ps->resources); |
| 523 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | } |
| 525 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 526 | static void acpi_device_release(struct device *dev) |
| 527 | { |
| 528 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 529 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 530 | acpi_free_ids(acpi_dev); |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 531 | acpi_free_power_resources_lists(acpi_dev); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 532 | kfree(acpi_dev); |
| 533 | } |
| 534 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 535 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
| 536 | { |
| 537 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 538 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); |
| 539 | |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 540 | return acpi_dev->flags.match_driver |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 541 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 542 | } |
| 543 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 544 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 545 | { |
| 546 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 547 | int len; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 548 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 549 | if (list_empty(&acpi_dev->pnp.ids)) |
| 550 | return 0; |
| 551 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 552 | if (add_uevent_var(env, "MODALIAS=")) |
| 553 | return -ENOMEM; |
| 554 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], |
| 555 | sizeof(env->buf) - env->buflen); |
| 556 | if (len >= (sizeof(env->buf) - env->buflen)) |
| 557 | return -ENOMEM; |
| 558 | env->buflen += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | return 0; |
| 560 | } |
| 561 | |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 562 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
| 563 | { |
| 564 | struct acpi_device *device = data; |
| 565 | |
| 566 | device->driver->ops.notify(device, event); |
| 567 | } |
| 568 | |
| 569 | static acpi_status acpi_device_notify_fixed(void *data) |
| 570 | { |
| 571 | struct acpi_device *device = data; |
| 572 | |
Bjorn Helgaas | 53de535 | 2009-08-31 22:32:20 +0000 | [diff] [blame] | 573 | /* Fixed hardware devices have no handles */ |
| 574 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 575 | return AE_OK; |
| 576 | } |
| 577 | |
| 578 | static int acpi_device_install_notify_handler(struct acpi_device *device) |
| 579 | { |
| 580 | acpi_status status; |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 581 | |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 582 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 583 | status = |
| 584 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 585 | acpi_device_notify_fixed, |
| 586 | device); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 587 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 588 | status = |
| 589 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 590 | acpi_device_notify_fixed, |
| 591 | device); |
| 592 | else |
| 593 | status = acpi_install_notify_handler(device->handle, |
| 594 | ACPI_DEVICE_NOTIFY, |
| 595 | acpi_device_notify, |
| 596 | device); |
| 597 | |
| 598 | if (ACPI_FAILURE(status)) |
| 599 | return -EINVAL; |
| 600 | return 0; |
| 601 | } |
| 602 | |
| 603 | static void acpi_device_remove_notify_handler(struct acpi_device *device) |
| 604 | { |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 605 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 606 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 607 | acpi_device_notify_fixed); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 608 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 609 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 610 | acpi_device_notify_fixed); |
| 611 | else |
| 612 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 613 | acpi_device_notify); |
| 614 | } |
| 615 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 616 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 617 | static int acpi_device_probe(struct device * dev) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 618 | { |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 619 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 620 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
| 621 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 623 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); |
| 624 | if (!ret) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 625 | if (acpi_drv->ops.notify) { |
| 626 | ret = acpi_device_install_notify_handler(acpi_dev); |
| 627 | if (ret) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 628 | if (acpi_drv->ops.remove) |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 629 | acpi_drv->ops.remove(acpi_dev); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 630 | return ret; |
| 631 | } |
| 632 | } |
| 633 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 634 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 635 | "Found driver [%s] for device [%s]\n", |
| 636 | acpi_drv->name, acpi_dev->pnp.bus_id)); |
| 637 | get_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 638 | } |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 639 | return ret; |
| 640 | } |
| 641 | |
| 642 | static int acpi_device_remove(struct device * dev) |
| 643 | { |
| 644 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 645 | struct acpi_driver *acpi_drv = acpi_dev->driver; |
| 646 | |
| 647 | if (acpi_drv) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 648 | if (acpi_drv->ops.notify) |
| 649 | acpi_device_remove_notify_handler(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 650 | if (acpi_drv->ops.remove) |
Rafael J. Wysocki | 51fac83 | 2013-01-24 00:24:48 +0100 | [diff] [blame] | 651 | acpi_drv->ops.remove(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 652 | } |
| 653 | acpi_dev->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 654 | acpi_dev->driver_data = NULL; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 655 | |
| 656 | put_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 657 | return 0; |
| 658 | } |
| 659 | |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 660 | struct bus_type acpi_bus_type = { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 661 | .name = "acpi", |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 662 | .match = acpi_bus_match, |
| 663 | .probe = acpi_device_probe, |
| 664 | .remove = acpi_device_remove, |
| 665 | .uevent = acpi_device_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | }; |
| 667 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 668 | int acpi_device_add(struct acpi_device *device, |
| 669 | void (*release)(struct device *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 671 | int result; |
| 672 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
| 673 | int found = 0; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 674 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 675 | if (device->handle) { |
| 676 | acpi_status status; |
| 677 | |
| 678 | status = acpi_attach_data(device->handle, acpi_bus_data_handler, |
| 679 | device); |
| 680 | if (ACPI_FAILURE(status)) { |
| 681 | acpi_handle_err(device->handle, |
| 682 | "Unable to attach device data\n"); |
| 683 | return -ENODEV; |
| 684 | } |
| 685 | } |
| 686 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | /* |
| 688 | * Linkage |
| 689 | * ------- |
| 690 | * Link this device to its parent and siblings. |
| 691 | */ |
| 692 | INIT_LIST_HEAD(&device->children); |
| 693 | INIT_LIST_HEAD(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | INIT_LIST_HEAD(&device->wakeup_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 695 | INIT_LIST_HEAD(&device->physical_node_list); |
| 696 | mutex_init(&device->physical_node_lock); |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 697 | INIT_LIST_HEAD(&device->power_dependent); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 699 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
| 700 | if (!new_bus_id) { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 701 | pr_err(PREFIX "Memory allocation error\n"); |
| 702 | result = -ENOMEM; |
| 703 | goto err_detach; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 704 | } |
| 705 | |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 706 | mutex_lock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 707 | /* |
| 708 | * Find suitable bus_id and instance number in acpi_bus_id_list |
| 709 | * If failed, create one and link it into acpi_bus_id_list |
| 710 | */ |
| 711 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 712 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 713 | acpi_device_hid(device))) { |
| 714 | acpi_device_bus_id->instance_no++; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 715 | found = 1; |
| 716 | kfree(new_bus_id); |
| 717 | break; |
| 718 | } |
| 719 | } |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 720 | if (!found) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 721 | acpi_device_bus_id = new_bus_id; |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 722 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 723 | acpi_device_bus_id->instance_no = 0; |
| 724 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
| 725 | } |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 726 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 727 | |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 728 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 729 | list_add_tail(&device->node, &device->parent->children); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | if (device->wakeup.flags.valid) |
| 732 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 733 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 735 | if (device->parent) |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 736 | device->dev.parent = &device->parent->dev; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 737 | device->dev.bus = &acpi_bus_type; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 738 | device->dev.release = release; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 739 | result = device_add(&device->dev); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 740 | if (result) { |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 741 | dev_err(&device->dev, "Error registering device\n"); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 742 | goto err; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 743 | } |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 744 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 745 | result = acpi_device_setup_files(device); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 746 | if (result) |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 747 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
| 748 | dev_name(&device->dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 749 | |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 750 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 751 | return 0; |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 752 | |
| 753 | err: |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 754 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 755 | if (device->parent) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 756 | list_del(&device->node); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 757 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 758 | mutex_unlock(&acpi_device_lock); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 759 | |
| 760 | err_detach: |
| 761 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 762 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | } |
| 764 | |
Rafael J. Wysocki | b17b537 | 2013-01-15 13:23:44 +0100 | [diff] [blame] | 765 | static void acpi_device_unregister(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | { |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 767 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 768 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | list_del(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
| 771 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 772 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 775 | |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 776 | acpi_power_add_remove_device(device, false); |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 777 | acpi_device_remove_files(device); |
Rafael J. Wysocki | b1c0f99 | 2013-01-24 12:50:09 +0100 | [diff] [blame] | 778 | if (device->remove) |
| 779 | device->remove(device); |
| 780 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 781 | device_del(&device->dev); |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 782 | /* |
| 783 | * Drop the reference counts of all power resources the device depends |
| 784 | * on and turn off the ones that have no more references. |
| 785 | */ |
| 786 | acpi_power_transition(device, ACPI_STATE_D3_COLD); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 787 | put_device(&device->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | } |
| 789 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 790 | /* -------------------------------------------------------------------------- |
| 791 | Driver Management |
| 792 | -------------------------------------------------------------------------- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 794 | * acpi_bus_driver_init - add a device to a driver |
| 795 | * @device: the device to add and initialize |
| 796 | * @driver: driver for the device |
| 797 | * |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 798 | * Used to initialize a device via its device driver. Called whenever a |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 799 | * driver is bound to a device. Invokes the driver's add() ops. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | */ |
| 801 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 802 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 804 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | if (!device || !driver) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 807 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | |
| 809 | if (!driver->ops.add) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 810 | return -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | result = driver->ops.add(device); |
| 813 | if (result) { |
| 814 | device->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 815 | device->driver_data = NULL; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 816 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
| 818 | |
| 819 | device->driver = driver; |
| 820 | |
| 821 | /* |
| 822 | * TBD - Configuration Management: Assign resources to device based |
| 823 | * upon possible configuration and currently allocated resources. |
| 824 | */ |
| 825 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 826 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 827 | "Driver successfully bound to device\n")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 828 | return 0; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 829 | } |
| 830 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 832 | * acpi_bus_register_driver - register a driver with the ACPI bus |
| 833 | * @driver: driver being registered |
| 834 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | * Registers a driver with the ACPI bus. Searches the namespace for all |
Bjorn Helgaas | 9d9f749 | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 836 | * devices that match the driver's criteria and binds. Returns zero for |
| 837 | * success or a negative error status for failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 839 | int acpi_bus_register_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 841 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | |
| 843 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 844 | return -ENODEV; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 845 | driver->drv.name = driver->name; |
| 846 | driver->drv.bus = &acpi_bus_type; |
| 847 | driver->drv.owner = driver->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 849 | ret = driver_register(&driver->drv); |
| 850 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 853 | EXPORT_SYMBOL(acpi_bus_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | |
| 855 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 856 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus |
| 857 | * @driver: driver to unregister |
| 858 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
| 860 | * devices that match the driver's criteria and unbinds. |
| 861 | */ |
Bjorn Helgaas | 06ea8e08 | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 862 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 864 | driver_unregister(&driver->drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 866 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
| 868 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | /* -------------------------------------------------------------------------- |
| 870 | Device Enumeration |
| 871 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 872 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
| 873 | { |
| 874 | acpi_status status; |
| 875 | int ret; |
| 876 | struct acpi_device *device; |
| 877 | |
| 878 | /* |
| 879 | * Fixed hardware devices do not appear in the namespace and do not |
| 880 | * have handles, but we fabricate acpi_devices for them, so we have |
| 881 | * to deal with them specially. |
| 882 | */ |
| 883 | if (handle == NULL) |
| 884 | return acpi_root; |
| 885 | |
| 886 | do { |
| 887 | status = acpi_get_parent(handle, &handle); |
| 888 | if (status == AE_NULL_ENTRY) |
| 889 | return NULL; |
| 890 | if (ACPI_FAILURE(status)) |
| 891 | return acpi_root; |
| 892 | |
| 893 | ret = acpi_bus_get_device(handle, &device); |
| 894 | if (ret == 0) |
| 895 | return device; |
| 896 | } while (1); |
| 897 | } |
| 898 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 899 | acpi_status |
| 900 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) |
| 901 | { |
| 902 | acpi_status status; |
| 903 | acpi_handle tmp; |
| 904 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 905 | union acpi_object *obj; |
| 906 | |
| 907 | status = acpi_get_handle(handle, "_EJD", &tmp); |
| 908 | if (ACPI_FAILURE(status)) |
| 909 | return status; |
| 910 | |
| 911 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); |
| 912 | if (ACPI_SUCCESS(status)) { |
| 913 | obj = buffer.pointer; |
Holger Macht | 3b5fee5 | 2008-02-14 13:40:34 +0100 | [diff] [blame] | 914 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
| 915 | ejd); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 916 | kfree(buffer.pointer); |
| 917 | } |
| 918 | return status; |
| 919 | } |
| 920 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); |
| 921 | |
Bob Moore | 8e4319c | 2009-06-29 13:43:27 +0800 | [diff] [blame] | 922 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | { |
| 924 | |
| 925 | /* TBD */ |
| 926 | |
| 927 | return; |
| 928 | } |
| 929 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 930 | static int acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
| 931 | struct acpi_device_wakeup *wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 933 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 934 | union acpi_object *package = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | union acpi_object *element = NULL; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 936 | acpi_status status; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 937 | int err = -ENODATA; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 939 | if (!wakeup) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 940 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 942 | INIT_LIST_HEAD(&wakeup->resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 944 | /* _PRW */ |
| 945 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); |
| 946 | if (ACPI_FAILURE(status)) { |
| 947 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 948 | return err; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 949 | } |
| 950 | |
| 951 | package = (union acpi_object *)buffer.pointer; |
| 952 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 953 | if (!package || package->package.count < 2) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 954 | goto out; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | element = &(package->package.elements[0]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 957 | if (!element) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 958 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | if (element->type == ACPI_TYPE_PACKAGE) { |
| 961 | if ((element->package.count < 2) || |
| 962 | (element->package.elements[0].type != |
| 963 | ACPI_TYPE_LOCAL_REFERENCE) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 964 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 965 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 966 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 967 | wakeup->gpe_device = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | element->package.elements[0].reference.handle; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 969 | wakeup->gpe_number = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | (u32) element->package.elements[1].integer.value; |
| 971 | } else if (element->type == ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 972 | wakeup->gpe_device = NULL; |
| 973 | wakeup->gpe_number = element->integer.value; |
| 974 | } else { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 975 | goto out; |
| 976 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
| 978 | element = &(package->package.elements[1]); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 979 | if (element->type != ACPI_TYPE_INTEGER) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 980 | goto out; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 981 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 982 | wakeup->sleep_state = element->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 984 | err = acpi_extract_power_resources(package, 2, &wakeup->resources); |
| 985 | if (err) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 986 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 988 | if (!list_empty(&wakeup->resources)) { |
| 989 | int sleep_state; |
| 990 | |
| 991 | sleep_state = acpi_power_min_system_level(&wakeup->resources); |
| 992 | if (sleep_state < wakeup->sleep_state) { |
| 993 | acpi_handle_warn(handle, "Overriding _PRW sleep state " |
| 994 | "(S%d) by S%d from power resources\n", |
| 995 | (int)wakeup->sleep_state, sleep_state); |
| 996 | wakeup->sleep_state = sleep_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } |
Lin Ming | bba63a2 | 2010-12-13 13:39:17 +0800 | [diff] [blame] | 999 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
Rafael J. Wysocki | 9874647 | 2010-07-08 00:43:36 +0200 | [diff] [blame] | 1000 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1001 | out: |
| 1002 | kfree(buffer.pointer); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1003 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1006 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1008 | struct acpi_device_id button_device_ids[] = { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1009 | {"PNP0C0C", 0}, |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 1010 | {"PNP0C0D", 0}, |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1011 | {"PNP0C0E", 0}, |
| 1012 | {"", 0}, |
| 1013 | }; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1014 | acpi_status status; |
| 1015 | acpi_event_status event_status; |
| 1016 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 1017 | device->wakeup.flags.notifier_present = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1018 | |
| 1019 | /* Power button, Lid switch always enable wakeup */ |
| 1020 | if (!acpi_match_device_ids(device, button_device_ids)) { |
| 1021 | device->wakeup.flags.run_wake = 1; |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 1022 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
| 1023 | /* Do not use Lid/sleep button for S5 wakeup */ |
| 1024 | if (device->wakeup.sleep_state == ACPI_STATE_S5) |
| 1025 | device->wakeup.sleep_state = ACPI_STATE_S4; |
| 1026 | } |
Rafael J. Wysocki | f2b56bc | 2011-01-06 23:34:22 +0100 | [diff] [blame] | 1027 | device_set_wakeup_capable(&device->dev, true); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1028 | return; |
| 1029 | } |
| 1030 | |
Rafael J. Wysocki | e8e18c9 | 2010-07-08 00:42:51 +0200 | [diff] [blame] | 1031 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
| 1032 | device->wakeup.gpe_number, |
| 1033 | &event_status); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1034 | if (status == AE_OK) |
| 1035 | device->wakeup.flags.run_wake = |
| 1036 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); |
| 1037 | } |
| 1038 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1039 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1040 | { |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1041 | acpi_handle temp; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1042 | acpi_status status = 0; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1043 | int err; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 1044 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1045 | /* Presence of _PRW indicates wake capable */ |
| 1046 | status = acpi_get_handle(device->handle, "_PRW", &temp); |
| 1047 | if (ACPI_FAILURE(status)) |
| 1048 | return; |
| 1049 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1050 | err = acpi_bus_extract_wakeup_device_power_package(device->handle, |
| 1051 | &device->wakeup); |
| 1052 | if (err) { |
| 1053 | dev_err(&device->dev, "_PRW evaluation error: %d\n", err); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1054 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | } |
| 1056 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | device->wakeup.flags.valid = 1; |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 1058 | device->wakeup.prepare_count = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 1059 | acpi_bus_set_run_wake_flags(device); |
Zhao Yakui | 729b2bd | 2008-03-19 13:26:54 +0800 | [diff] [blame] | 1060 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
| 1061 | * system for the ACPI device with the _PRW object. |
| 1062 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. |
| 1063 | * So it is necessary to call _DSW object first. Only when it is not |
| 1064 | * present will the _PSW object used. |
| 1065 | */ |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1066 | err = acpi_device_sleep_wake(device, 0, 0, 0); |
| 1067 | if (err) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 1068 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1069 | "error in _DSW or _PSW evaluation\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | } |
| 1071 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1072 | static void acpi_bus_init_power_state(struct acpi_device *device, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | { |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1074 | struct acpi_device_power_state *ps = &device->power.states[state]; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1075 | char pathname[5] = { '_', 'P', 'R', '0' + state, '\0' }; |
| 1076 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1077 | acpi_handle handle; |
| 1078 | acpi_status status; |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1079 | |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1080 | INIT_LIST_HEAD(&ps->resources); |
| 1081 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1082 | /* Evaluate "_PRx" to get referenced power resources */ |
| 1083 | status = acpi_evaluate_object(device->handle, pathname, NULL, &buffer); |
| 1084 | if (ACPI_SUCCESS(status)) { |
| 1085 | union acpi_object *package = buffer.pointer; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1086 | |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1087 | if (buffer.length && package |
| 1088 | && package->type == ACPI_TYPE_PACKAGE |
| 1089 | && package->package.count) { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1090 | int err = acpi_extract_power_resources(package, 0, |
| 1091 | &ps->resources); |
| 1092 | if (!err) |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1093 | device->power.flags.power_resources = 1; |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1094 | } |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1095 | ACPI_FREE(buffer.pointer); |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1099 | pathname[2] = 'S'; |
| 1100 | status = acpi_get_handle(device->handle, pathname, &handle); |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1101 | if (ACPI_SUCCESS(status)) |
| 1102 | ps->flags.explicit_set = 1; |
| 1103 | |
| 1104 | /* |
| 1105 | * State is valid if there are means to put the device into it. |
| 1106 | * D3hot is only valid if _PR3 present. |
| 1107 | */ |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1108 | if (!list_empty(&ps->resources) |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1109 | || (ps->flags.explicit_set && state < ACPI_STATE_D3_HOT)) { |
| 1110 | ps->flags.valid = 1; |
| 1111 | ps->flags.os_accessible = 1; |
| 1112 | } |
| 1113 | |
| 1114 | ps->power = -1; /* Unknown - driver assigned */ |
| 1115 | ps->latency = -1; /* Unknown - driver assigned */ |
| 1116 | } |
| 1117 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1118 | static void acpi_bus_get_power_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | { |
Rafael J. Wysocki | 8bc5053 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 1120 | acpi_status status; |
| 1121 | acpi_handle handle; |
| 1122 | u32 i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1124 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
| 1125 | status = acpi_get_handle(device->handle, "_PS0", &handle); |
| 1126 | if (ACPI_FAILURE(status)) { |
| 1127 | status = acpi_get_handle(device->handle, "_PR0", &handle); |
| 1128 | if (ACPI_FAILURE(status)) |
| 1129 | return; |
| 1130 | } |
| 1131 | |
| 1132 | device->flags.power_manageable = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | |
| 1134 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1135 | * Power Management Flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | */ |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1137 | status = acpi_get_handle(device->handle, "_PSC", &handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | if (ACPI_SUCCESS(status)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1139 | device->power.flags.explicit_get = 1; |
| 1140 | status = acpi_get_handle(device->handle, "_IRC", &handle); |
| 1141 | if (ACPI_SUCCESS(status)) |
| 1142 | device->power.flags.inrush_current = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | |
| 1144 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1145 | * Enumerate supported power management states |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | */ |
Rafael J. Wysocki | f33ce56 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1147 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) |
| 1148 | acpi_bus_init_power_state(device, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1150 | INIT_LIST_HEAD(&device->power.states[ACPI_STATE_D3_COLD].resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1152 | /* Set defaults for D0 and D3 states (always valid) */ |
| 1153 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
| 1154 | device->power.states[ACPI_STATE_D0].power = 100; |
| 1155 | device->power.states[ACPI_STATE_D3].flags.valid = 1; |
| 1156 | device->power.states[ACPI_STATE_D3].power = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 1158 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
| 1159 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) |
| 1160 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; |
| 1161 | |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 1162 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
| 1163 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || |
| 1164 | device->power.flags.power_resources) |
| 1165 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; |
| 1166 | |
Rafael J. Wysocki | ade3e7f | 2010-11-25 00:08:36 +0100 | [diff] [blame] | 1167 | acpi_bus_init_power(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | } |
| 1169 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1170 | static void acpi_bus_get_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1172 | acpi_status status = AE_OK; |
| 1173 | acpi_handle temp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | /* Presence of _STA indicates 'dynamic_status' */ |
| 1176 | status = acpi_get_handle(device->handle, "_STA", &temp); |
| 1177 | if (ACPI_SUCCESS(status)) |
| 1178 | device->flags.dynamic_status = 1; |
| 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | /* Presence of _RMV indicates 'removable' */ |
| 1181 | status = acpi_get_handle(device->handle, "_RMV", &temp); |
| 1182 | if (ACPI_SUCCESS(status)) |
| 1183 | device->flags.removable = 1; |
| 1184 | |
| 1185 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ |
| 1186 | status = acpi_get_handle(device->handle, "_EJD", &temp); |
| 1187 | if (ACPI_SUCCESS(status)) |
| 1188 | device->flags.ejectable = 1; |
| 1189 | else { |
| 1190 | status = acpi_get_handle(device->handle, "_EJ0", &temp); |
| 1191 | if (ACPI_SUCCESS(status)) |
| 1192 | device->flags.ejectable = 1; |
| 1193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | } |
| 1195 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1196 | static void acpi_device_get_busid(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1198 | char bus_id[5] = { '?', 0 }; |
| 1199 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; |
| 1200 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | |
| 1202 | /* |
| 1203 | * Bus ID |
| 1204 | * ------ |
| 1205 | * The device's Bus ID is simply the object name. |
| 1206 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? |
| 1207 | */ |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1208 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1209 | strcpy(device->pnp.bus_id, "ACPI"); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1210 | return; |
| 1211 | } |
| 1212 | |
| 1213 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | case ACPI_BUS_TYPE_POWER_BUTTON: |
| 1215 | strcpy(device->pnp.bus_id, "PWRF"); |
| 1216 | break; |
| 1217 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
| 1218 | strcpy(device->pnp.bus_id, "SLPF"); |
| 1219 | break; |
| 1220 | default: |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1221 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | /* Clean up trailing underscores (if any) */ |
| 1223 | for (i = 3; i > 1; i--) { |
| 1224 | if (bus_id[i] == '_') |
| 1225 | bus_id[i] = '\0'; |
| 1226 | else |
| 1227 | break; |
| 1228 | } |
| 1229 | strcpy(device->pnp.bus_id, bus_id); |
| 1230 | break; |
| 1231 | } |
| 1232 | } |
| 1233 | |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1234 | /* |
| 1235 | * acpi_bay_match - see if a device is an ejectable driver bay |
| 1236 | * |
| 1237 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, |
| 1238 | * then we can safely call it an ejectable drive bay |
| 1239 | */ |
| 1240 | static int acpi_bay_match(struct acpi_device *device){ |
| 1241 | acpi_status status; |
| 1242 | acpi_handle handle; |
| 1243 | acpi_handle tmp; |
| 1244 | acpi_handle phandle; |
| 1245 | |
| 1246 | handle = device->handle; |
| 1247 | |
| 1248 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
| 1249 | if (ACPI_FAILURE(status)) |
| 1250 | return -ENODEV; |
| 1251 | |
| 1252 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || |
| 1253 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || |
| 1254 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || |
| 1255 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) |
| 1256 | return 0; |
| 1257 | |
| 1258 | if (acpi_get_parent(handle, &phandle)) |
| 1259 | return -ENODEV; |
| 1260 | |
| 1261 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || |
| 1262 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || |
| 1263 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || |
| 1264 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) |
| 1265 | return 0; |
| 1266 | |
| 1267 | return -ENODEV; |
| 1268 | } |
| 1269 | |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1270 | /* |
| 1271 | * acpi_dock_match - see if a device has a _DCK method |
| 1272 | */ |
| 1273 | static int acpi_dock_match(struct acpi_device *device) |
| 1274 | { |
| 1275 | acpi_handle tmp; |
| 1276 | return acpi_get_handle(device->handle, "_DCK", &tmp); |
| 1277 | } |
| 1278 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 1279 | const char *acpi_device_hid(struct acpi_device *device) |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1280 | { |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1281 | struct acpi_hardware_id *hid; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1282 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 1283 | if (list_empty(&device->pnp.ids)) |
| 1284 | return dummy_hid; |
| 1285 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1286 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
| 1287 | return hid->id; |
| 1288 | } |
| 1289 | EXPORT_SYMBOL(acpi_device_hid); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1290 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1291 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
| 1292 | { |
| 1293 | struct acpi_hardware_id *id; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1294 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1295 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
| 1296 | if (!id) |
| 1297 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1298 | |
Thomas Meyer | 581de59 | 2011-08-06 11:32:56 +0200 | [diff] [blame] | 1299 | id->id = kstrdup(dev_id, GFP_KERNEL); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1300 | if (!id->id) { |
| 1301 | kfree(id); |
| 1302 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1303 | } |
| 1304 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1305 | list_add_tail(&id->list, &device->pnp.ids); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1306 | } |
| 1307 | |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1308 | /* |
| 1309 | * Old IBM workstations have a DSDT bug wherein the SMBus object |
| 1310 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" |
| 1311 | * prefix. Work around this. |
| 1312 | */ |
| 1313 | static int acpi_ibm_smbus_match(struct acpi_device *device) |
| 1314 | { |
| 1315 | acpi_handle h_dummy; |
| 1316 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 1317 | int result; |
| 1318 | |
| 1319 | if (!dmi_name_in_vendors("IBM")) |
| 1320 | return -ENODEV; |
| 1321 | |
| 1322 | /* Look for SMBS object */ |
| 1323 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); |
| 1324 | if (result) |
| 1325 | return result; |
| 1326 | |
| 1327 | if (strcmp("SMBS", path.pointer)) { |
| 1328 | result = -ENODEV; |
| 1329 | goto out; |
| 1330 | } |
| 1331 | |
| 1332 | /* Does it have the necessary (but misnamed) methods? */ |
| 1333 | result = -ENODEV; |
| 1334 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && |
| 1335 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && |
| 1336 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) |
| 1337 | result = 0; |
| 1338 | out: |
| 1339 | kfree(path.pointer); |
| 1340 | return result; |
| 1341 | } |
| 1342 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1343 | static void acpi_device_set_id(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1345 | acpi_status status; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1346 | struct acpi_device_info *info; |
Lv Zheng | 78e25fe | 2012-10-31 02:25:24 +0000 | [diff] [blame] | 1347 | struct acpi_pnp_device_id_list *cid_list; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1348 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1350 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | case ACPI_BUS_TYPE_DEVICE: |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1352 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1353 | acpi_add_id(device, ACPI_SYSTEM_HID); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1354 | break; |
| 1355 | } |
| 1356 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1357 | status = acpi_get_object_info(device->handle, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | if (ACPI_FAILURE(status)) { |
Harvey Harrison | 96b2dd1 | 2008-03-05 18:24:51 -0800 | [diff] [blame] | 1359 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | return; |
| 1361 | } |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | if (info->valid & ACPI_VALID_HID) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1364 | acpi_add_id(device, info->hardware_id.string); |
| 1365 | if (info->valid & ACPI_VALID_CID) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1366 | cid_list = &info->compatible_id_list; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1367 | for (i = 0; i < cid_list->count; i++) |
| 1368 | acpi_add_id(device, cid_list->ids[i].string); |
| 1369 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | if (info->valid & ACPI_VALID_ADR) { |
| 1371 | device->pnp.bus_address = info->address; |
| 1372 | device->flags.bus_address = 1; |
| 1373 | } |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1374 | if (info->valid & ACPI_VALID_UID) |
| 1375 | device->pnp.unique_id = kstrdup(info->unique_id.string, |
| 1376 | GFP_KERNEL); |
Zhang Rui | ae84333 | 2006-12-07 20:57:10 +0800 | [diff] [blame] | 1377 | |
Bjorn Helgaas | a83893ae | 2009-10-02 11:03:12 -0400 | [diff] [blame] | 1378 | kfree(info); |
| 1379 | |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1380 | /* |
| 1381 | * Some devices don't reliably have _HIDs & _CIDs, so add |
| 1382 | * synthetic HIDs to make sure drivers can find them. |
| 1383 | */ |
Thomas Renninger | c3d6de6 | 2008-08-01 17:37:55 +0200 | [diff] [blame] | 1384 | if (acpi_is_video_device(device)) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1385 | acpi_add_id(device, ACPI_VIDEO_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1386 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1387 | acpi_add_id(device, ACPI_BAY_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1388 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1389 | acpi_add_id(device, ACPI_DOCK_HID); |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1390 | else if (!acpi_ibm_smbus_match(device)) |
| 1391 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); |
Rafael J. Wysocki | 4f5f64c | 2013-01-04 23:00:54 +0100 | [diff] [blame] | 1392 | else if (list_empty(&device->pnp.ids) && |
Bjorn Helgaas | b7b30de | 2010-03-24 10:44:33 -0600 | [diff] [blame] | 1393 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
| 1394 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ |
| 1395 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
| 1396 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); |
| 1397 | } |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1398 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | break; |
| 1400 | case ACPI_BUS_TYPE_POWER: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1401 | acpi_add_id(device, ACPI_POWER_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | break; |
| 1403 | case ACPI_BUS_TYPE_PROCESSOR: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1404 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | case ACPI_BUS_TYPE_THERMAL: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1407 | acpi_add_id(device, ACPI_THERMAL_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | break; |
| 1409 | case ACPI_BUS_TYPE_POWER_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1410 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | break; |
| 1412 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1413 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | break; |
| 1415 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | } |
| 1417 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1418 | void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, |
| 1419 | int type, unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | { |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1421 | INIT_LIST_HEAD(&device->pnp.ids); |
| 1422 | device->device_type = type; |
| 1423 | device->handle = handle; |
| 1424 | device->parent = acpi_bus_get_parent(handle); |
| 1425 | STRUCT_TO_INT(device->status) = sta; |
| 1426 | acpi_device_get_busid(device); |
| 1427 | acpi_device_set_id(device); |
| 1428 | acpi_bus_get_flags(device); |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1429 | device->flags.match_driver = false; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1430 | device_initialize(&device->dev); |
| 1431 | dev_set_uevent_suppress(&device->dev, true); |
| 1432 | } |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1433 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1434 | void acpi_device_add_finalize(struct acpi_device *device) |
| 1435 | { |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1436 | device->flags.match_driver = true; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1437 | dev_set_uevent_suppress(&device->dev, false); |
| 1438 | kobject_uevent(&device->dev.kobj, KOBJ_ADD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | } |
| 1440 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1441 | static int acpi_add_single_object(struct acpi_device **child, |
| 1442 | acpi_handle handle, int type, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1443 | unsigned long long sta) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | { |
Bjorn Helgaas | 77c2488 | 2009-09-21 19:29:30 +0000 | [diff] [blame] | 1445 | int result; |
| 1446 | struct acpi_device *device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1447 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 1449 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1451 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1452 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1455 | acpi_init_device_object(device, handle, type, sta); |
| 1456 | acpi_bus_get_power_flags(device); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1457 | acpi_bus_get_wakeup_device_flags(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1459 | result = acpi_device_add(device, acpi_device_release); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1460 | if (result) { |
Hugh Dickins | 718fb0d | 2009-08-06 23:18:12 +0000 | [diff] [blame] | 1461 | acpi_device_release(&device->dev); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1462 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | } |
| 1464 | |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1465 | acpi_power_add_remove_device(device, true); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 1466 | acpi_device_add_finalize(device); |
Rafael J. Wysocki | d43e167 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1467 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 1468 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Added %s [%s] parent %s\n", |
| 1469 | dev_name(&device->dev), (char *) buffer.pointer, |
| 1470 | device->parent ? dev_name(&device->parent->dev) : "(null)")); |
| 1471 | kfree(buffer.pointer); |
| 1472 | *child = device; |
| 1473 | return 0; |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1474 | } |
| 1475 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1476 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
| 1477 | unsigned long long *sta) |
| 1478 | { |
| 1479 | acpi_status status; |
| 1480 | acpi_object_type acpi_type; |
| 1481 | |
| 1482 | status = acpi_get_type(handle, &acpi_type); |
| 1483 | if (ACPI_FAILURE(status)) |
| 1484 | return -ENODEV; |
| 1485 | |
| 1486 | switch (acpi_type) { |
| 1487 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
| 1488 | case ACPI_TYPE_DEVICE: |
| 1489 | *type = ACPI_BUS_TYPE_DEVICE; |
| 1490 | status = acpi_bus_get_status_handle(handle, sta); |
| 1491 | if (ACPI_FAILURE(status)) |
| 1492 | return -ENODEV; |
| 1493 | break; |
| 1494 | case ACPI_TYPE_PROCESSOR: |
| 1495 | *type = ACPI_BUS_TYPE_PROCESSOR; |
| 1496 | status = acpi_bus_get_status_handle(handle, sta); |
| 1497 | if (ACPI_FAILURE(status)) |
| 1498 | return -ENODEV; |
| 1499 | break; |
| 1500 | case ACPI_TYPE_THERMAL: |
| 1501 | *type = ACPI_BUS_TYPE_THERMAL; |
| 1502 | *sta = ACPI_STA_DEFAULT; |
| 1503 | break; |
| 1504 | case ACPI_TYPE_POWER: |
| 1505 | *type = ACPI_BUS_TYPE_POWER; |
| 1506 | *sta = ACPI_STA_DEFAULT; |
| 1507 | break; |
| 1508 | default: |
| 1509 | return -ENODEV; |
| 1510 | } |
| 1511 | |
| 1512 | return 0; |
| 1513 | } |
| 1514 | |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1515 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
| 1516 | void *not_used, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1518 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1519 | int type; |
| 1520 | unsigned long long sta; |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1521 | acpi_status status; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1522 | int result; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1523 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1524 | acpi_bus_get_device(handle, &device); |
| 1525 | if (device) |
| 1526 | goto out; |
| 1527 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1528 | result = acpi_bus_type_and_status(handle, &type, &sta); |
| 1529 | if (result) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1530 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 1532 | if (type == ACPI_BUS_TYPE_POWER) { |
| 1533 | acpi_add_power_resource(handle); |
| 1534 | return AE_OK; |
| 1535 | } |
| 1536 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1537 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1538 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
Rafael J. Wysocki | 86e4e20 | 2011-01-06 23:40:00 +0100 | [diff] [blame] | 1539 | struct acpi_device_wakeup wakeup; |
| 1540 | acpi_handle temp; |
| 1541 | |
| 1542 | status = acpi_get_handle(handle, "_PRW", &temp); |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1543 | if (ACPI_SUCCESS(status)) { |
Rafael J. Wysocki | 86e4e20 | 2011-01-06 23:40:00 +0100 | [diff] [blame] | 1544 | acpi_bus_extract_wakeup_device_power_package(handle, |
| 1545 | &wakeup); |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 1546 | acpi_power_resources_list_free(&wakeup.resources); |
| 1547 | } |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1548 | return AE_CTRL_DEPTH; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1549 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1551 | acpi_add_single_object(&device, handle, type, sta); |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1552 | if (!device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1553 | return AE_CTRL_DEPTH; |
| 1554 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1555 | out: |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1556 | if (!*return_value) |
| 1557 | *return_value = device; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1558 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1559 | return AE_OK; |
| 1560 | } |
| 1561 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1562 | static int acpi_scan_attach_handler(struct acpi_device *device) |
| 1563 | { |
| 1564 | struct acpi_scan_handler *handler; |
| 1565 | int ret = 0; |
| 1566 | |
| 1567 | list_for_each_entry(handler, &acpi_scan_handlers_list, list_node) { |
| 1568 | const struct acpi_device_id *id; |
| 1569 | |
| 1570 | id = __acpi_match_device(device, handler->ids); |
| 1571 | if (!id) |
| 1572 | continue; |
| 1573 | |
| 1574 | ret = handler->attach(device, id); |
| 1575 | if (ret > 0) { |
| 1576 | device->handler = handler; |
| 1577 | break; |
| 1578 | } else if (ret < 0) { |
| 1579 | break; |
| 1580 | } |
| 1581 | } |
| 1582 | return ret; |
| 1583 | } |
| 1584 | |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1585 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
| 1586 | void *not_used, void **ret_not_used) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1587 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1588 | struct acpi_device *device; |
| 1589 | unsigned long long sta_not_used; |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1590 | int ret; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1591 | |
| 1592 | /* |
| 1593 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating |
| 1594 | * namespace walks prematurely. |
| 1595 | */ |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1596 | if (acpi_bus_type_and_status(handle, &ret, &sta_not_used)) |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1597 | return AE_OK; |
| 1598 | |
| 1599 | if (acpi_bus_get_device(handle, &device)) |
| 1600 | return AE_CTRL_DEPTH; |
| 1601 | |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1602 | ret = acpi_scan_attach_handler(device); |
| 1603 | if (ret) |
| 1604 | return ret > 0 ? AE_OK : AE_CTRL_DEPTH; |
| 1605 | |
| 1606 | ret = device_attach(&device->dev); |
| 1607 | return ret >= 0 ? AE_OK : AE_CTRL_DEPTH; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1608 | } |
| 1609 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1610 | /** |
| 1611 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
| 1612 | * @handle: Root of the namespace scope to scan. |
| 1613 | * |
| 1614 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
| 1615 | * found devices. |
| 1616 | * |
| 1617 | * If no devices were found, -ENODEV is returned, but it does not mean that |
| 1618 | * there has been a real error. There just have been no suitable ACPI objects |
| 1619 | * in the table trunk from which the kernel could create a device and add an |
| 1620 | * appropriate driver. |
| 1621 | */ |
| 1622 | int acpi_bus_scan(acpi_handle handle) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1623 | { |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1624 | void *device = NULL; |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1625 | int error = 0; |
| 1626 | |
| 1627 | mutex_lock(&acpi_scan_lock); |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1628 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1629 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1630 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1631 | acpi_bus_check_add, NULL, NULL, &device); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1632 | |
Thomas Renninger | d2f6650 | 2010-01-29 17:48:51 +0100 | [diff] [blame] | 1633 | if (!device) |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1634 | error = -ENODEV; |
| 1635 | else if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL))) |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1636 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1637 | acpi_bus_device_attach, NULL, NULL, NULL); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1638 | |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1639 | mutex_unlock(&acpi_scan_lock); |
| 1640 | return error; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1641 | } |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1642 | EXPORT_SYMBOL(acpi_bus_scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1644 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
| 1645 | void *not_used, void **ret_not_used) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | { |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1647 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1649 | if (!acpi_bus_get_device(handle, &device)) { |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1650 | struct acpi_scan_handler *dev_handler = device->handler; |
| 1651 | |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1652 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
Rafael J. Wysocki | ca589f9 | 2013-01-30 14:27:29 +0100 | [diff] [blame] | 1653 | if (dev_handler) { |
| 1654 | if (dev_handler->detach) |
| 1655 | dev_handler->detach(device); |
| 1656 | |
| 1657 | device->handler = NULL; |
| 1658 | } else { |
| 1659 | device_release_driver(&device->dev); |
| 1660 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | } |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1662 | return AE_OK; |
| 1663 | } |
| 1664 | |
| 1665 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
| 1666 | void *not_used, void **ret_not_used) |
| 1667 | { |
| 1668 | struct acpi_device *device = NULL; |
| 1669 | |
| 1670 | if (!acpi_bus_get_device(handle, &device)) |
| 1671 | acpi_device_unregister(device); |
| 1672 | |
| 1673 | return AE_OK; |
| 1674 | } |
| 1675 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 1676 | void acpi_bus_trim(struct acpi_device *start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | { |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1678 | mutex_lock(&acpi_scan_lock); |
| 1679 | |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 1680 | /* |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1681 | * Execute acpi_bus_device_detach() as a post-order callback to detach |
| 1682 | * all ACPI drivers from the device nodes being removed. |
| 1683 | */ |
| 1684 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, |
| 1685 | acpi_bus_device_detach, NULL, NULL); |
| 1686 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); |
| 1687 | /* |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 1688 | * Execute acpi_bus_remove() as a post-order callback to remove device |
| 1689 | * nodes in the given namespace scope. |
| 1690 | */ |
| 1691 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, |
| 1692 | acpi_bus_remove, NULL, NULL); |
| 1693 | acpi_bus_remove(start->handle, 0, NULL, NULL); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1694 | |
| 1695 | mutex_unlock(&acpi_scan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | } |
Kristen Accardi | ceaba66 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 1697 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
| 1698 | |
Bjorn Helgaas | e8b945c | 2009-09-21 19:28:59 +0000 | [diff] [blame] | 1699 | static int acpi_bus_scan_fixed(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1701 | int result = 0; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1702 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | /* |
| 1704 | * Enumerate all fixed-feature devices. |
| 1705 | */ |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1706 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON)) { |
| 1707 | struct acpi_device *device = NULL; |
| 1708 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1709 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1710 | ACPI_BUS_TYPE_POWER_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1711 | ACPI_STA_DEFAULT); |
| 1712 | if (result) |
| 1713 | return result; |
| 1714 | |
| 1715 | result = device_attach(&device->dev); |
| 1716 | if (result < 0) |
| 1717 | return result; |
| 1718 | |
Daniel Drake | c10d7a1 | 2012-05-10 00:08:43 +0100 | [diff] [blame] | 1719 | device_init_wakeup(&device->dev, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1720 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1722 | if (!(acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON)) { |
| 1723 | struct acpi_device *device = NULL; |
| 1724 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1725 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1726 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1727 | ACPI_STA_DEFAULT); |
| 1728 | if (result) |
| 1729 | return result; |
| 1730 | |
| 1731 | result = device_attach(&device->dev); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1732 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | |
Rafael J. Wysocki | 2c0d4fe | 2013-01-29 13:57:20 +0100 | [diff] [blame] | 1734 | return result < 0 ? result : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | } |
| 1736 | |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 1737 | int __init acpi_scan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | { |
| 1739 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | |
Patrick Mochel | 5b32726 | 2006-05-10 10:33:00 -0400 | [diff] [blame] | 1741 | result = bus_register(&acpi_bus_type); |
| 1742 | if (result) { |
| 1743 | /* We don't want to quit even if we failed to add suspend/resume */ |
| 1744 | printk(KERN_ERR PREFIX "Could not register bus type\n"); |
| 1745 | } |
| 1746 | |
Rafael J. Wysocki | 92ef2a2 | 2012-12-21 00:36:40 +0100 | [diff] [blame] | 1747 | acpi_pci_root_init(); |
Rafael J. Wysocki | 4daeaf6 | 2013-01-30 14:27:37 +0100 | [diff] [blame] | 1748 | acpi_pci_link_init(); |
Rafael J. Wysocki | 141a297 | 2013-01-30 14:27:40 +0100 | [diff] [blame^] | 1749 | acpi_platform_init(); |
Mika Westerberg | 13176bb | 2013-01-17 09:59:33 +0000 | [diff] [blame] | 1750 | acpi_csrt_init(); |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 1751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | * Enumerate devices in the ACPI namespace. |
| 1754 | */ |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1755 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1756 | if (result) |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1757 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1759 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | if (result) |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1761 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1763 | result = acpi_bus_scan_fixed(); |
| 1764 | if (result) { |
| 1765 | acpi_device_unregister(acpi_root); |
| 1766 | return result; |
| 1767 | } |
| 1768 | |
| 1769 | acpi_update_all_gpes(); |
| 1770 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | } |