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 | |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 32 | /* |
| 33 | * The following ACPI IDs are known to be suitable for representing as |
| 34 | * platform devices. |
| 35 | */ |
| 36 | static const struct acpi_device_id acpi_platform_device_ids[] = { |
| 37 | |
Adrian Hunter | 142b007 | 2012-11-23 21:11:47 +0100 | [diff] [blame] | 38 | { "PNP0D40" }, |
| 39 | |
Mika Westerberg | 5e7779f | 2012-12-07 23:12:01 +0100 | [diff] [blame] | 40 | /* Haswell LPSS devices */ |
| 41 | { "INT33C0", 0 }, |
| 42 | { "INT33C1", 0 }, |
| 43 | { "INT33C2", 0 }, |
| 44 | { "INT33C3", 0 }, |
| 45 | { "INT33C4", 0 }, |
| 46 | { "INT33C5", 0 }, |
| 47 | { "INT33C6", 0 }, |
| 48 | { "INT33C7", 0 }, |
| 49 | |
Mika Westerberg | 91e5687 | 2012-10-31 22:45:02 +0100 | [diff] [blame] | 50 | { } |
| 51 | }; |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | static LIST_HEAD(acpi_device_list); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 54 | static LIST_HEAD(acpi_bus_id_list); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 55 | static DEFINE_MUTEX(acpi_scan_lock); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 56 | DEFINE_MUTEX(acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | LIST_HEAD(acpi_wakeup_device_list); |
| 58 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 59 | struct acpi_device_bus_id{ |
Zhang Rui | bb09585 | 2007-01-04 15:03:18 +0800 | [diff] [blame] | 60 | char bus_id[15]; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 61 | unsigned int instance_no; |
| 62 | struct list_head node; |
| 63 | }; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 64 | |
| 65 | /* |
| 66 | * Creates hid/cid(s) string needed for modalias and uevent |
| 67 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 68 | * char *modalias: "acpi:IBM0001:ACPI0001" |
| 69 | */ |
Adrian Bunk | b3e572d | 2007-08-14 23:22:35 +0200 | [diff] [blame] | 70 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
| 71 | int size) |
| 72 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 73 | int len; |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 74 | int count; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 75 | struct acpi_hardware_id *id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 76 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 77 | if (list_empty(&acpi_dev->pnp.ids)) |
| 78 | return 0; |
| 79 | |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 80 | len = snprintf(modalias, size, "acpi:"); |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 81 | size -= len; |
| 82 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 83 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
| 84 | count = snprintf(&modalias[len], size, "%s:", id->id); |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 85 | if (count < 0 || count >= size) |
| 86 | return -EINVAL; |
| 87 | len += count; |
| 88 | size -= count; |
| 89 | } |
| 90 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 91 | modalias[len] = '\0'; |
| 92 | return len; |
| 93 | } |
| 94 | |
| 95 | static ssize_t |
| 96 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 97 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 98 | int len; |
| 99 | |
| 100 | /* Device has no HID and no CID or string is >1024 */ |
| 101 | len = create_modalias(acpi_dev, buf, 1024); |
| 102 | if (len <= 0) |
| 103 | return 0; |
| 104 | buf[len++] = '\n'; |
| 105 | return len; |
| 106 | } |
| 107 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); |
| 108 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 109 | /** |
| 110 | * acpi_bus_hot_remove_device: hot-remove a device and its children |
| 111 | * @context: struct acpi_eject_event pointer (freed in this func) |
| 112 | * |
| 113 | * Hot-remove a device and its children. This function frees up the |
| 114 | * memory space passed by arg context, so that the caller may call |
| 115 | * this function asynchronously through acpi_os_hotplug_execute(). |
| 116 | */ |
| 117 | void acpi_bus_hot_remove_device(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 119 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 120 | struct acpi_device *device = ej_event->device; |
| 121 | acpi_handle handle = device->handle; |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 122 | acpi_handle temp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | struct acpi_object_list arg_list; |
| 124 | union acpi_object arg; |
| 125 | acpi_status status = AE_OK; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 126 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 128 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 129 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 130 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 131 | acpi_bus_trim(device); |
| 132 | /* Device node has been released. */ |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 133 | device = NULL; |
| 134 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 135 | /* power off device */ |
| 136 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); |
| 137 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 138 | printk(KERN_WARNING PREFIX |
| 139 | "Power-off device failed\n"); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 140 | |
Toshi Kani | b3c450c | 2012-10-26 13:38:57 +0200 | [diff] [blame] | 141 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | arg_list.count = 1; |
| 143 | arg_list.pointer = &arg; |
| 144 | arg.type = ACPI_TYPE_INTEGER; |
| 145 | arg.integer.value = 0; |
| 146 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); |
| 147 | } |
| 148 | |
| 149 | arg_list.count = 1; |
| 150 | arg_list.pointer = &arg; |
| 151 | arg.type = ACPI_TYPE_INTEGER; |
| 152 | arg.integer.value = 1; |
| 153 | |
| 154 | /* |
| 155 | * TBD: _EJD support. |
| 156 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 158 | if (ACPI_FAILURE(status)) { |
| 159 | if (status != AE_NOT_FOUND) |
| 160 | printk(KERN_WARNING PREFIX |
| 161 | "Eject device failed\n"); |
| 162 | goto err_out; |
| 163 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 165 | kfree(context); |
| 166 | return; |
| 167 | |
| 168 | err_out: |
| 169 | /* Inform firmware the hot-remove operation has completed w/ error */ |
| 170 | (void) acpi_evaluate_hotplug_ost(handle, |
| 171 | ej_event->event, ost_code, NULL); |
| 172 | kfree(context); |
Zhang Rui | c8d72a5 | 2009-06-22 11:31:16 +0800 | [diff] [blame] | 173 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
Toshi Kani | 61622ac | 2012-11-01 14:42:12 +0000 | [diff] [blame] | 175 | EXPORT_SYMBOL(acpi_bus_hot_remove_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | static ssize_t |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 178 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
| 179 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | int ret = count; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | acpi_status status; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 183 | acpi_object_type type = 0; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 184 | struct acpi_device *acpi_device = to_acpi_device(d); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 185 | struct acpi_eject_event *ej_event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | if ((!count) || (buf[0] != '1')) { |
| 188 | return -EINVAL; |
| 189 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #ifndef FORCE_EJECT |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 191 | if (acpi_device->driver == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | ret = -ENODEV; |
| 193 | goto err; |
| 194 | } |
| 195 | #endif |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 196 | status = acpi_get_type(acpi_device->handle, &type); |
| 197 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | ret = -ENODEV; |
| 199 | goto err; |
| 200 | } |
| 201 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 202 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
| 203 | if (!ej_event) { |
| 204 | ret = -ENOMEM; |
| 205 | goto err; |
| 206 | } |
| 207 | |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 208 | ej_event->device = acpi_device; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 209 | if (acpi_device->flags.eject_pending) { |
| 210 | /* event originated from ACPI eject notification */ |
| 211 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; |
| 212 | acpi_device->flags.eject_pending = 0; |
| 213 | } else { |
| 214 | /* event originated from user */ |
| 215 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; |
Yinghai Lu | 5993c46 | 2013-01-11 22:40:41 +0000 | [diff] [blame] | 216 | (void) acpi_evaluate_hotplug_ost(acpi_device->handle, |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 217 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
| 218 | } |
| 219 | |
| 220 | 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] | 221 | err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 225 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 227 | static ssize_t |
| 228 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 229 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Bjorn Helgaas | ea8d82f | 2009-09-21 13:35:09 -0600 | [diff] [blame] | 231 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 232 | } |
| 233 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
| 234 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 235 | static ssize_t acpi_device_uid_show(struct device *dev, |
| 236 | struct device_attribute *attr, char *buf) |
| 237 | { |
| 238 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 239 | |
| 240 | return sprintf(buf, "%s\n", acpi_dev->pnp.unique_id); |
| 241 | } |
| 242 | static DEVICE_ATTR(uid, 0444, acpi_device_uid_show, NULL); |
| 243 | |
| 244 | static ssize_t acpi_device_adr_show(struct device *dev, |
| 245 | struct device_attribute *attr, char *buf) |
| 246 | { |
| 247 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 248 | |
| 249 | return sprintf(buf, "0x%08x\n", |
| 250 | (unsigned int)(acpi_dev->pnp.bus_address)); |
| 251 | } |
| 252 | static DEVICE_ATTR(adr, 0444, acpi_device_adr_show, NULL); |
| 253 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 254 | static ssize_t |
| 255 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 256 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 257 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 258 | int result; |
| 259 | |
| 260 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 261 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 262 | goto end; |
| 263 | |
| 264 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
| 265 | kfree(path.pointer); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 266 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 267 | return result; |
| 268 | } |
| 269 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
| 270 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 271 | /* sysfs file that shows description text from the ACPI _STR method */ |
| 272 | static ssize_t description_show(struct device *dev, |
| 273 | struct device_attribute *attr, |
| 274 | char *buf) { |
| 275 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 276 | int result; |
| 277 | |
| 278 | if (acpi_dev->pnp.str_obj == NULL) |
| 279 | return 0; |
| 280 | |
| 281 | /* |
| 282 | * The _STR object contains a Unicode identifier for a device. |
| 283 | * We need to convert to utf-8 so it can be displayed. |
| 284 | */ |
| 285 | result = utf16s_to_utf8s( |
| 286 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, |
| 287 | acpi_dev->pnp.str_obj->buffer.length, |
| 288 | UTF16_LITTLE_ENDIAN, buf, |
| 289 | PAGE_SIZE); |
| 290 | |
| 291 | buf[result++] = '\n'; |
| 292 | |
| 293 | return result; |
| 294 | } |
| 295 | static DEVICE_ATTR(description, 0444, description_show, NULL); |
| 296 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 297 | static ssize_t |
| 298 | acpi_device_sun_show(struct device *dev, struct device_attribute *attr, |
| 299 | char *buf) { |
| 300 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 301 | |
| 302 | return sprintf(buf, "%lu\n", acpi_dev->pnp.sun); |
| 303 | } |
| 304 | static DEVICE_ATTR(sun, 0444, acpi_device_sun_show, NULL); |
| 305 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 306 | static int acpi_device_setup_files(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | { |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 308 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 309 | acpi_status status; |
| 310 | acpi_handle temp; |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 311 | unsigned long long sun; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 312 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 314 | /* |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 315 | * Devices gotten from FADT don't have a "path" attribute |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 316 | */ |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 317 | if (dev->handle) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 318 | result = device_create_file(&dev->dev, &dev_attr_path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 319 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 320 | goto end; |
| 321 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 323 | if (!list_empty(&dev->pnp.ids)) { |
| 324 | result = device_create_file(&dev->dev, &dev_attr_hid); |
| 325 | if (result) |
| 326 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 328 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
| 329 | if (result) |
| 330 | goto end; |
| 331 | } |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 332 | |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 333 | /* |
| 334 | * If device has _STR, 'description' file is created |
| 335 | */ |
| 336 | status = acpi_get_handle(dev->handle, "_STR", &temp); |
| 337 | if (ACPI_SUCCESS(status)) { |
| 338 | status = acpi_evaluate_object(dev->handle, "_STR", |
| 339 | NULL, &buffer); |
| 340 | if (ACPI_FAILURE(status)) |
| 341 | buffer.pointer = NULL; |
| 342 | dev->pnp.str_obj = buffer.pointer; |
| 343 | result = device_create_file(&dev->dev, &dev_attr_description); |
| 344 | if (result) |
| 345 | goto end; |
| 346 | } |
| 347 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 348 | if (dev->flags.bus_address) |
| 349 | result = device_create_file(&dev->dev, &dev_attr_adr); |
| 350 | if (dev->pnp.unique_id) |
| 351 | result = device_create_file(&dev->dev, &dev_attr_uid); |
| 352 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 353 | status = acpi_evaluate_integer(dev->handle, "_SUN", NULL, &sun); |
| 354 | if (ACPI_SUCCESS(status)) { |
| 355 | dev->pnp.sun = (unsigned long)sun; |
| 356 | result = device_create_file(&dev->dev, &dev_attr_sun); |
| 357 | if (result) |
| 358 | goto end; |
| 359 | } else { |
| 360 | dev->pnp.sun = (unsigned long)-1; |
| 361 | } |
| 362 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 363 | /* |
| 364 | * If device has _EJ0, 'eject' file is created that is used to trigger |
| 365 | * hot-removal function from userland. |
| 366 | */ |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 367 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
| 368 | if (ACPI_SUCCESS(status)) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 369 | result = device_create_file(&dev->dev, &dev_attr_eject); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 370 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 371 | return result; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 374 | static void acpi_device_remove_files(struct acpi_device *dev) |
| 375 | { |
| 376 | acpi_status status; |
| 377 | acpi_handle temp; |
| 378 | |
| 379 | /* |
Lance Ortiz | d1efe3c | 2012-10-02 12:43:23 -0600 | [diff] [blame] | 380 | * If device has _STR, remove 'description' file |
| 381 | */ |
| 382 | status = acpi_get_handle(dev->handle, "_STR", &temp); |
| 383 | if (ACPI_SUCCESS(status)) { |
| 384 | kfree(dev->pnp.str_obj); |
| 385 | device_remove_file(&dev->dev, &dev_attr_description); |
| 386 | } |
| 387 | /* |
| 388 | * If device has _EJ0, remove 'eject' file. |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 389 | */ |
| 390 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
| 391 | if (ACPI_SUCCESS(status)) |
| 392 | device_remove_file(&dev->dev, &dev_attr_eject); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 393 | |
Yasuaki Ishimatsu | bb74ac2 | 2012-11-16 02:56:59 +0100 | [diff] [blame] | 394 | status = acpi_get_handle(dev->handle, "_SUN", &temp); |
| 395 | if (ACPI_SUCCESS(status)) |
| 396 | device_remove_file(&dev->dev, &dev_attr_sun); |
| 397 | |
Lv Zheng | 923d4a4 | 2012-10-30 14:43:26 +0100 | [diff] [blame] | 398 | if (dev->pnp.unique_id) |
| 399 | device_remove_file(&dev->dev, &dev_attr_uid); |
| 400 | if (dev->flags.bus_address) |
| 401 | device_remove_file(&dev->dev, &dev_attr_adr); |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 402 | device_remove_file(&dev->dev, &dev_attr_modalias); |
| 403 | device_remove_file(&dev->dev, &dev_attr_hid); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 404 | if (dev->handle) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 405 | device_remove_file(&dev->dev, &dev_attr_path); |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 406 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | /* -------------------------------------------------------------------------- |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 408 | ACPI Bus operations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | -------------------------------------------------------------------------- */ |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 410 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 411 | static const struct acpi_device_id *__acpi_match_device( |
| 412 | struct acpi_device *device, const struct acpi_device_id *ids) |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 413 | { |
| 414 | const struct acpi_device_id *id; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 415 | struct acpi_hardware_id *hwid; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 416 | |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 417 | /* |
| 418 | * If the device is not present, it is unnecessary to load device |
| 419 | * driver for it. |
| 420 | */ |
| 421 | if (!device->status.present) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 422 | return NULL; |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 423 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 424 | for (id = ids; id->id[0]; id++) |
| 425 | list_for_each_entry(hwid, &device->pnp.ids, list) |
| 426 | if (!strcmp((char *) id->id, hwid->id)) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 427 | return id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 428 | |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 429 | return NULL; |
| 430 | } |
| 431 | |
| 432 | /** |
| 433 | * acpi_match_device - Match a struct device against a given list of ACPI IDs |
| 434 | * @ids: Array of struct acpi_device_id object to match against. |
| 435 | * @dev: The device structure to match. |
| 436 | * |
| 437 | * Check if @dev has a valid ACPI handle and if there is a struct acpi_device |
| 438 | * object for that handle and use that object to match against a given list of |
| 439 | * device IDs. |
| 440 | * |
| 441 | * Return a pointer to the first matching ID on success or %NULL on failure. |
| 442 | */ |
| 443 | const struct acpi_device_id *acpi_match_device(const struct acpi_device_id *ids, |
| 444 | const struct device *dev) |
| 445 | { |
| 446 | struct acpi_device *adev; |
Rafael J. Wysocki | 0613e1f | 2013-01-31 20:54:05 +0100 | [diff] [blame^] | 447 | acpi_handle handle = ACPI_HANDLE(dev); |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 448 | |
Rafael J. Wysocki | 0613e1f | 2013-01-31 20:54:05 +0100 | [diff] [blame^] | 449 | if (!ids || !handle || acpi_bus_get_device(handle, &adev)) |
Mika Westerberg | cf761af | 2012-10-31 22:44:41 +0100 | [diff] [blame] | 450 | return NULL; |
| 451 | |
| 452 | return __acpi_match_device(adev, ids); |
| 453 | } |
| 454 | EXPORT_SYMBOL_GPL(acpi_match_device); |
| 455 | |
| 456 | int acpi_match_device_ids(struct acpi_device *device, |
| 457 | const struct acpi_device_id *ids) |
| 458 | { |
| 459 | return __acpi_match_device(device, ids) ? 0 : -ENOENT; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 460 | } |
| 461 | EXPORT_SYMBOL(acpi_match_device_ids); |
| 462 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 463 | static void acpi_free_ids(struct acpi_device *device) |
| 464 | { |
| 465 | struct acpi_hardware_id *id, *tmp; |
| 466 | |
| 467 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { |
| 468 | kfree(id->id); |
| 469 | kfree(id); |
| 470 | } |
| 471 | } |
| 472 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 473 | static void acpi_device_release(struct device *dev) |
| 474 | { |
| 475 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 476 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 477 | acpi_free_ids(acpi_dev); |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 478 | kfree(acpi_dev->pnp.unique_id); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 479 | kfree(acpi_dev); |
| 480 | } |
| 481 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 482 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
| 483 | { |
| 484 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 485 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); |
| 486 | |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 487 | return acpi_dev->flags.match_driver |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 488 | && !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 489 | } |
| 490 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 491 | 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] | 492 | { |
| 493 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 494 | int len; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 495 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 496 | if (list_empty(&acpi_dev->pnp.ids)) |
| 497 | return 0; |
| 498 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 499 | if (add_uevent_var(env, "MODALIAS=")) |
| 500 | return -ENOMEM; |
| 501 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], |
| 502 | sizeof(env->buf) - env->buflen); |
| 503 | if (len >= (sizeof(env->buf) - env->buflen)) |
| 504 | return -ENOMEM; |
| 505 | env->buflen += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | return 0; |
| 507 | } |
| 508 | |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 509 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
| 510 | { |
| 511 | struct acpi_device *device = data; |
| 512 | |
| 513 | device->driver->ops.notify(device, event); |
| 514 | } |
| 515 | |
| 516 | static acpi_status acpi_device_notify_fixed(void *data) |
| 517 | { |
| 518 | struct acpi_device *device = data; |
| 519 | |
Bjorn Helgaas | 53de535 | 2009-08-31 22:32:20 +0000 | [diff] [blame] | 520 | /* Fixed hardware devices have no handles */ |
| 521 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 522 | return AE_OK; |
| 523 | } |
| 524 | |
| 525 | static int acpi_device_install_notify_handler(struct acpi_device *device) |
| 526 | { |
| 527 | acpi_status status; |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 528 | |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 529 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 530 | status = |
| 531 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 532 | acpi_device_notify_fixed, |
| 533 | device); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 534 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 535 | status = |
| 536 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 537 | acpi_device_notify_fixed, |
| 538 | device); |
| 539 | else |
| 540 | status = acpi_install_notify_handler(device->handle, |
| 541 | ACPI_DEVICE_NOTIFY, |
| 542 | acpi_device_notify, |
| 543 | device); |
| 544 | |
| 545 | if (ACPI_FAILURE(status)) |
| 546 | return -EINVAL; |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | static void acpi_device_remove_notify_handler(struct acpi_device *device) |
| 551 | { |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 552 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 553 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 554 | acpi_device_notify_fixed); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 555 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 556 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 557 | acpi_device_notify_fixed); |
| 558 | else |
| 559 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 560 | acpi_device_notify); |
| 561 | } |
| 562 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 563 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 564 | static int acpi_device_probe(struct device * dev) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 565 | { |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 566 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 567 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
| 568 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 570 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); |
| 571 | if (!ret) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 572 | if (acpi_drv->ops.notify) { |
| 573 | ret = acpi_device_install_notify_handler(acpi_dev); |
| 574 | if (ret) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 575 | if (acpi_drv->ops.remove) |
| 576 | acpi_drv->ops.remove(acpi_dev, |
| 577 | acpi_dev->removal_type); |
| 578 | return ret; |
| 579 | } |
| 580 | } |
| 581 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 582 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 583 | "Found driver [%s] for device [%s]\n", |
| 584 | acpi_drv->name, acpi_dev->pnp.bus_id)); |
| 585 | get_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 586 | } |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 587 | return ret; |
| 588 | } |
| 589 | |
| 590 | static int acpi_device_remove(struct device * dev) |
| 591 | { |
| 592 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 593 | struct acpi_driver *acpi_drv = acpi_dev->driver; |
| 594 | |
| 595 | if (acpi_drv) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 596 | if (acpi_drv->ops.notify) |
| 597 | acpi_device_remove_notify_handler(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 598 | if (acpi_drv->ops.remove) |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 599 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 600 | } |
| 601 | acpi_dev->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 602 | acpi_dev->driver_data = NULL; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 603 | |
| 604 | put_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 605 | return 0; |
| 606 | } |
| 607 | |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 608 | struct bus_type acpi_bus_type = { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 609 | .name = "acpi", |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 610 | .match = acpi_bus_match, |
| 611 | .probe = acpi_device_probe, |
| 612 | .remove = acpi_device_remove, |
| 613 | .uevent = acpi_device_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | }; |
| 615 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 616 | static int acpi_device_register(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 618 | int result; |
| 619 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
| 620 | int found = 0; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | /* |
| 623 | * Linkage |
| 624 | * ------- |
| 625 | * Link this device to its parent and siblings. |
| 626 | */ |
| 627 | INIT_LIST_HEAD(&device->children); |
| 628 | INIT_LIST_HEAD(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | INIT_LIST_HEAD(&device->wakeup_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame] | 630 | INIT_LIST_HEAD(&device->physical_node_list); |
| 631 | mutex_init(&device->physical_node_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 633 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
| 634 | if (!new_bus_id) { |
| 635 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
| 636 | return -ENOMEM; |
| 637 | } |
| 638 | |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 639 | mutex_lock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 640 | /* |
| 641 | * Find suitable bus_id and instance number in acpi_bus_id_list |
| 642 | * If failed, create one and link it into acpi_bus_id_list |
| 643 | */ |
| 644 | 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] | 645 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 646 | acpi_device_hid(device))) { |
| 647 | acpi_device_bus_id->instance_no++; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 648 | found = 1; |
| 649 | kfree(new_bus_id); |
| 650 | break; |
| 651 | } |
| 652 | } |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 653 | if (!found) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 654 | acpi_device_bus_id = new_bus_id; |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 655 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 656 | acpi_device_bus_id->instance_no = 0; |
| 657 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
| 658 | } |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 659 | 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] | 660 | |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 661 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | list_add_tail(&device->node, &device->parent->children); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 663 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | if (device->wakeup.flags.valid) |
| 665 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 666 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 668 | if (device->parent) |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 669 | device->dev.parent = &device->parent->dev; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 670 | device->dev.bus = &acpi_bus_type; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 671 | device->dev.release = &acpi_device_release; |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 672 | result = device_register(&device->dev); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 673 | if (result) { |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 674 | dev_err(&device->dev, "Error registering device\n"); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 675 | goto end; |
| 676 | } |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 677 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 678 | result = acpi_device_setup_files(device); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 679 | if (result) |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 680 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
| 681 | dev_name(&device->dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 682 | |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 683 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 684 | return 0; |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 685 | end: |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 686 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 687 | if (device->parent) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 688 | list_del(&device->node); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 689 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 690 | mutex_unlock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 691 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
Rafael J. Wysocki | b17b537 | 2013-01-15 13:23:44 +0100 | [diff] [blame] | 694 | static void acpi_device_unregister(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 696 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 697 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | list_del(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
| 700 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 701 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | |
| 703 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 704 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 705 | acpi_device_remove_files(device); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 706 | device_unregister(&device->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
| 708 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 709 | /* -------------------------------------------------------------------------- |
| 710 | Driver Management |
| 711 | -------------------------------------------------------------------------- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 713 | * acpi_bus_driver_init - add a device to a driver |
| 714 | * @device: the device to add and initialize |
| 715 | * @driver: driver for the device |
| 716 | * |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 717 | * Used to initialize a device via its device driver. Called whenever a |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 718 | * driver is bound to a device. Invokes the driver's add() ops. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | */ |
| 720 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 721 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 723 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if (!device || !driver) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 726 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | |
| 728 | if (!driver->ops.add) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 729 | return -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
| 731 | result = driver->ops.add(device); |
| 732 | if (result) { |
| 733 | device->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 734 | device->driver_data = NULL; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 735 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | } |
| 737 | |
| 738 | device->driver = driver; |
| 739 | |
| 740 | /* |
| 741 | * TBD - Configuration Management: Assign resources to device based |
| 742 | * upon possible configuration and currently allocated resources. |
| 743 | */ |
| 744 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 745 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 746 | "Driver successfully bound to device\n")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 747 | return 0; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 748 | } |
| 749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 751 | * acpi_bus_register_driver - register a driver with the ACPI bus |
| 752 | * @driver: driver being registered |
| 753 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | * Registers a driver with the ACPI bus. Searches the namespace for all |
Bjorn Helgaas | 9d9f749 | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 755 | * devices that match the driver's criteria and binds. Returns zero for |
| 756 | * success or a negative error status for failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 758 | int acpi_bus_register_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 760 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
| 762 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 763 | return -ENODEV; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 764 | driver->drv.name = driver->name; |
| 765 | driver->drv.bus = &acpi_bus_type; |
| 766 | driver->drv.owner = driver->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 768 | ret = driver_register(&driver->drv); |
| 769 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 772 | EXPORT_SYMBOL(acpi_bus_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | |
| 774 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 775 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus |
| 776 | * @driver: driver to unregister |
| 777 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
| 779 | * devices that match the driver's criteria and unbinds. |
| 780 | */ |
Bjorn Helgaas | 06ea8e08 | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 781 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 783 | driver_unregister(&driver->drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 785 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
| 787 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | /* -------------------------------------------------------------------------- |
| 789 | Device Enumeration |
| 790 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 791 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
| 792 | { |
| 793 | acpi_status status; |
| 794 | int ret; |
| 795 | struct acpi_device *device; |
| 796 | |
| 797 | /* |
| 798 | * Fixed hardware devices do not appear in the namespace and do not |
| 799 | * have handles, but we fabricate acpi_devices for them, so we have |
| 800 | * to deal with them specially. |
| 801 | */ |
| 802 | if (handle == NULL) |
| 803 | return acpi_root; |
| 804 | |
| 805 | do { |
| 806 | status = acpi_get_parent(handle, &handle); |
| 807 | if (status == AE_NULL_ENTRY) |
| 808 | return NULL; |
| 809 | if (ACPI_FAILURE(status)) |
| 810 | return acpi_root; |
| 811 | |
| 812 | ret = acpi_bus_get_device(handle, &device); |
| 813 | if (ret == 0) |
| 814 | return device; |
| 815 | } while (1); |
| 816 | } |
| 817 | |
Len Brown | c8f7a62c | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 818 | acpi_status |
| 819 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) |
| 820 | { |
| 821 | acpi_status status; |
| 822 | acpi_handle tmp; |
| 823 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 824 | union acpi_object *obj; |
| 825 | |
| 826 | status = acpi_get_handle(handle, "_EJD", &tmp); |
| 827 | if (ACPI_FAILURE(status)) |
| 828 | return status; |
| 829 | |
| 830 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); |
| 831 | if (ACPI_SUCCESS(status)) { |
| 832 | obj = buffer.pointer; |
Holger Macht | 3b5fee5 | 2008-02-14 13:40:34 +0100 | [diff] [blame] | 833 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
| 834 | ejd); |
Len Brown | c8f7a62c | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 835 | kfree(buffer.pointer); |
| 836 | } |
| 837 | return status; |
| 838 | } |
| 839 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); |
| 840 | |
Bob Moore | 8e4319c | 2009-06-29 13:43:27 +0800 | [diff] [blame] | 841 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
| 843 | |
| 844 | /* TBD */ |
| 845 | |
| 846 | return; |
| 847 | } |
| 848 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 849 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
| 850 | { |
| 851 | device->performance.state = ACPI_STATE_UNKNOWN; |
| 852 | return 0; |
| 853 | } |
| 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | static acpi_status |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 856 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
| 857 | struct acpi_device_wakeup *wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 859 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 860 | union acpi_object *package = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 861 | union acpi_object *element = NULL; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 862 | acpi_status status; |
| 863 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 865 | if (!wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | return AE_BAD_PARAMETER; |
| 867 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 868 | /* _PRW */ |
| 869 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); |
| 870 | if (ACPI_FAILURE(status)) { |
| 871 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
| 872 | return status; |
| 873 | } |
| 874 | |
| 875 | package = (union acpi_object *)buffer.pointer; |
| 876 | |
| 877 | if (!package || (package->package.count < 2)) { |
| 878 | status = AE_BAD_DATA; |
| 879 | goto out; |
| 880 | } |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | element = &(package->package.elements[0]); |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 883 | if (!element) { |
| 884 | status = AE_BAD_DATA; |
| 885 | goto out; |
| 886 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | if (element->type == ACPI_TYPE_PACKAGE) { |
| 888 | if ((element->package.count < 2) || |
| 889 | (element->package.elements[0].type != |
| 890 | ACPI_TYPE_LOCAL_REFERENCE) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 891 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
| 892 | status = AE_BAD_DATA; |
| 893 | goto out; |
| 894 | } |
| 895 | wakeup->gpe_device = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | element->package.elements[0].reference.handle; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 897 | wakeup->gpe_number = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 898 | (u32) element->package.elements[1].integer.value; |
| 899 | } else if (element->type == ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 900 | wakeup->gpe_device = NULL; |
| 901 | wakeup->gpe_number = element->integer.value; |
| 902 | } else { |
| 903 | status = AE_BAD_DATA; |
| 904 | goto out; |
| 905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
| 907 | element = &(package->package.elements[1]); |
| 908 | if (element->type != ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 909 | status = AE_BAD_DATA; |
| 910 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | } |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 912 | wakeup->sleep_state = element->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | |
| 914 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 915 | status = AE_NO_MEMORY; |
| 916 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 918 | wakeup->resources.count = package->package.count - 2; |
| 919 | for (i = 0; i < wakeup->resources.count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | element = &(package->package.elements[i + 2]); |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 921 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
| 922 | status = AE_BAD_DATA; |
| 923 | goto out; |
| 924 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 926 | wakeup->resources.handles[i] = element->reference.handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | } |
| 928 | |
Lin Ming | bba63a2 | 2010-12-13 13:39:17 +0800 | [diff] [blame] | 929 | 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] | 930 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 931 | out: |
| 932 | kfree(buffer.pointer); |
| 933 | |
| 934 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 937 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 939 | struct acpi_device_id button_device_ids[] = { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 940 | {"PNP0C0C", 0}, |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 941 | {"PNP0C0D", 0}, |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 942 | {"PNP0C0E", 0}, |
| 943 | {"", 0}, |
| 944 | }; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 945 | acpi_status status; |
| 946 | acpi_event_status event_status; |
| 947 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 948 | device->wakeup.flags.notifier_present = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 949 | |
| 950 | /* Power button, Lid switch always enable wakeup */ |
| 951 | if (!acpi_match_device_ids(device, button_device_ids)) { |
| 952 | device->wakeup.flags.run_wake = 1; |
Zhang Rui | b7e3830 | 2012-12-04 23:23:16 +0100 | [diff] [blame] | 953 | if (!acpi_match_device_ids(device, &button_device_ids[1])) { |
| 954 | /* Do not use Lid/sleep button for S5 wakeup */ |
| 955 | if (device->wakeup.sleep_state == ACPI_STATE_S5) |
| 956 | device->wakeup.sleep_state = ACPI_STATE_S4; |
| 957 | } |
Rafael J. Wysocki | f2b56bc | 2011-01-06 23:34:22 +0100 | [diff] [blame] | 958 | device_set_wakeup_capable(&device->dev, true); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 959 | return; |
| 960 | } |
| 961 | |
Rafael J. Wysocki | e8e18c9 | 2010-07-08 00:42:51 +0200 | [diff] [blame] | 962 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
| 963 | device->wakeup.gpe_number, |
| 964 | &event_status); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 965 | if (status == AE_OK) |
| 966 | device->wakeup.flags.run_wake = |
| 967 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); |
| 968 | } |
| 969 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 970 | 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] | 971 | { |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 972 | acpi_handle temp; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 973 | acpi_status status = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 974 | int psw_error; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 975 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 976 | /* Presence of _PRW indicates wake capable */ |
| 977 | status = acpi_get_handle(device->handle, "_PRW", &temp); |
| 978 | if (ACPI_FAILURE(status)) |
| 979 | return; |
| 980 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 981 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
| 982 | &device->wakeup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | if (ACPI_FAILURE(status)) { |
| 984 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 985 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | device->wakeup.flags.valid = 1; |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 989 | device->wakeup.prepare_count = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 990 | acpi_bus_set_run_wake_flags(device); |
Zhao Yakui | 729b2bd | 2008-03-19 13:26:54 +0800 | [diff] [blame] | 991 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
| 992 | * system for the ACPI device with the _PRW object. |
| 993 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. |
| 994 | * So it is necessary to call _DSW object first. Only when it is not |
| 995 | * present will the _PSW object used. |
| 996 | */ |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 997 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
| 998 | if (psw_error) |
| 999 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1000 | "error in _DSW or _PSW evaluation\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } |
| 1002 | |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1003 | static void acpi_bus_add_power_resource(acpi_handle handle); |
| 1004 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1005 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1007 | acpi_status status = 0; |
| 1008 | acpi_handle handle = NULL; |
| 1009 | u32 i = 0; |
| 1010 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
| 1012 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1013 | * Power Management Flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | */ |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1015 | status = acpi_get_handle(device->handle, "_PSC", &handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | if (ACPI_SUCCESS(status)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1017 | device->power.flags.explicit_get = 1; |
| 1018 | status = acpi_get_handle(device->handle, "_IRC", &handle); |
| 1019 | if (ACPI_SUCCESS(status)) |
| 1020 | device->power.flags.inrush_current = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
| 1022 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1023 | * Enumerate supported power management states |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | */ |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 1025 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1026 | struct acpi_device_power_state *ps = &device->power.states[i]; |
| 1027 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1029 | /* Evaluate "_PRx" to se if power resources are referenced */ |
| 1030 | acpi_evaluate_reference(device->handle, object_name, NULL, |
| 1031 | &ps->resources); |
| 1032 | if (ps->resources.count) { |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1033 | int j; |
| 1034 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1035 | device->power.flags.power_resources = 1; |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1036 | for (j = 0; j < ps->resources.count; j++) |
| 1037 | acpi_bus_add_power_resource(ps->resources.handles[j]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1040 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
| 1041 | object_name[2] = 'S'; |
| 1042 | status = acpi_get_handle(device->handle, object_name, &handle); |
Alex He | 3723997 | 2012-02-21 16:58:10 +0800 | [diff] [blame] | 1043 | if (ACPI_SUCCESS(status)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1044 | ps->flags.explicit_set = 1; |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1045 | |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 1046 | /* |
| 1047 | * State is valid if there are means to put the device into it. |
| 1048 | * D3hot is only valid if _PR3 present. |
| 1049 | */ |
| 1050 | if (ps->resources.count || |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 1051 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1052 | ps->flags.valid = 1; |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 1053 | ps->flags.os_accessible = 1; |
| 1054 | } |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1055 | |
| 1056 | ps->power = -1; /* Unknown - driver assigned */ |
| 1057 | ps->latency = -1; /* Unknown - driver assigned */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 1060 | /* Set defaults for D0 and D3 states (always valid) */ |
| 1061 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
| 1062 | device->power.states[ACPI_STATE_D0].power = 100; |
| 1063 | device->power.states[ACPI_STATE_D3].flags.valid = 1; |
| 1064 | device->power.states[ACPI_STATE_D3].power = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 1066 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
| 1067 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) |
| 1068 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; |
| 1069 | |
Aaron Lu | 1399dfc | 2012-11-21 23:33:40 +0100 | [diff] [blame] | 1070 | /* Presence of _PS3 or _PRx means we can put the device into D3 cold */ |
| 1071 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set || |
| 1072 | device->power.flags.power_resources) |
| 1073 | device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible = 1; |
| 1074 | |
Rafael J. Wysocki | ade3e7f | 2010-11-25 00:08:36 +0100 | [diff] [blame] | 1075 | acpi_bus_init_power(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | |
| 1077 | return 0; |
| 1078 | } |
| 1079 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1080 | static int acpi_bus_get_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1082 | acpi_status status = AE_OK; |
| 1083 | acpi_handle temp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | |
| 1086 | /* Presence of _STA indicates 'dynamic_status' */ |
| 1087 | status = acpi_get_handle(device->handle, "_STA", &temp); |
| 1088 | if (ACPI_SUCCESS(status)) |
| 1089 | device->flags.dynamic_status = 1; |
| 1090 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | /* Presence of _RMV indicates 'removable' */ |
| 1092 | status = acpi_get_handle(device->handle, "_RMV", &temp); |
| 1093 | if (ACPI_SUCCESS(status)) |
| 1094 | device->flags.removable = 1; |
| 1095 | |
| 1096 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ |
| 1097 | status = acpi_get_handle(device->handle, "_EJD", &temp); |
| 1098 | if (ACPI_SUCCESS(status)) |
| 1099 | device->flags.ejectable = 1; |
| 1100 | else { |
| 1101 | status = acpi_get_handle(device->handle, "_EJ0", &temp); |
| 1102 | if (ACPI_SUCCESS(status)) |
| 1103 | device->flags.ejectable = 1; |
| 1104 | } |
| 1105 | |
Rafael J. Wysocki | 7bed50c | 2011-04-26 11:33:18 +0200 | [diff] [blame] | 1106 | /* Power resources cannot be power manageable. */ |
| 1107 | if (device->device_type == ACPI_BUS_TYPE_POWER) |
| 1108 | return 0; |
| 1109 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
| 1111 | status = acpi_get_handle(device->handle, "_PS0", &temp); |
| 1112 | if (ACPI_FAILURE(status)) |
| 1113 | status = acpi_get_handle(device->handle, "_PR0", &temp); |
| 1114 | if (ACPI_SUCCESS(status)) |
| 1115 | device->flags.power_manageable = 1; |
| 1116 | |
Joe Perches | 3c5f9be4 | 2008-02-03 17:06:17 +0200 | [diff] [blame] | 1117 | /* TBD: Performance management */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1119 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 1121 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1122 | static void acpi_device_get_busid(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1124 | char bus_id[5] = { '?', 0 }; |
| 1125 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; |
| 1126 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
| 1128 | /* |
| 1129 | * Bus ID |
| 1130 | * ------ |
| 1131 | * The device's Bus ID is simply the object name. |
| 1132 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? |
| 1133 | */ |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1134 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | strcpy(device->pnp.bus_id, "ACPI"); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1136 | return; |
| 1137 | } |
| 1138 | |
| 1139 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | case ACPI_BUS_TYPE_POWER_BUTTON: |
| 1141 | strcpy(device->pnp.bus_id, "PWRF"); |
| 1142 | break; |
| 1143 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
| 1144 | strcpy(device->pnp.bus_id, "SLPF"); |
| 1145 | break; |
| 1146 | default: |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1147 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | /* Clean up trailing underscores (if any) */ |
| 1149 | for (i = 3; i > 1; i--) { |
| 1150 | if (bus_id[i] == '_') |
| 1151 | bus_id[i] = '\0'; |
| 1152 | else |
| 1153 | break; |
| 1154 | } |
| 1155 | strcpy(device->pnp.bus_id, bus_id); |
| 1156 | break; |
| 1157 | } |
| 1158 | } |
| 1159 | |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1160 | /* |
| 1161 | * acpi_bay_match - see if a device is an ejectable driver bay |
| 1162 | * |
| 1163 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, |
| 1164 | * then we can safely call it an ejectable drive bay |
| 1165 | */ |
| 1166 | static int acpi_bay_match(struct acpi_device *device){ |
| 1167 | acpi_status status; |
| 1168 | acpi_handle handle; |
| 1169 | acpi_handle tmp; |
| 1170 | acpi_handle phandle; |
| 1171 | |
| 1172 | handle = device->handle; |
| 1173 | |
| 1174 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
| 1175 | if (ACPI_FAILURE(status)) |
| 1176 | return -ENODEV; |
| 1177 | |
| 1178 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || |
| 1179 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || |
| 1180 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || |
| 1181 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) |
| 1182 | return 0; |
| 1183 | |
| 1184 | if (acpi_get_parent(handle, &phandle)) |
| 1185 | return -ENODEV; |
| 1186 | |
| 1187 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || |
| 1188 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || |
| 1189 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || |
| 1190 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) |
| 1191 | return 0; |
| 1192 | |
| 1193 | return -ENODEV; |
| 1194 | } |
| 1195 | |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1196 | /* |
| 1197 | * acpi_dock_match - see if a device has a _DCK method |
| 1198 | */ |
| 1199 | static int acpi_dock_match(struct acpi_device *device) |
| 1200 | { |
| 1201 | acpi_handle tmp; |
| 1202 | return acpi_get_handle(device->handle, "_DCK", &tmp); |
| 1203 | } |
| 1204 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 1205 | const char *acpi_device_hid(struct acpi_device *device) |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1206 | { |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1207 | struct acpi_hardware_id *hid; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1208 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 1209 | if (list_empty(&device->pnp.ids)) |
| 1210 | return dummy_hid; |
| 1211 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1212 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
| 1213 | return hid->id; |
| 1214 | } |
| 1215 | EXPORT_SYMBOL(acpi_device_hid); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1216 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1217 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
| 1218 | { |
| 1219 | struct acpi_hardware_id *id; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1220 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1221 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
| 1222 | if (!id) |
| 1223 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1224 | |
Thomas Meyer | 581de59 | 2011-08-06 11:32:56 +0200 | [diff] [blame] | 1225 | id->id = kstrdup(dev_id, GFP_KERNEL); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1226 | if (!id->id) { |
| 1227 | kfree(id); |
| 1228 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1229 | } |
| 1230 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1231 | list_add_tail(&id->list, &device->pnp.ids); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1232 | } |
| 1233 | |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1234 | /* |
| 1235 | * Old IBM workstations have a DSDT bug wherein the SMBus object |
| 1236 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" |
| 1237 | * prefix. Work around this. |
| 1238 | */ |
| 1239 | static int acpi_ibm_smbus_match(struct acpi_device *device) |
| 1240 | { |
| 1241 | acpi_handle h_dummy; |
| 1242 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 1243 | int result; |
| 1244 | |
| 1245 | if (!dmi_name_in_vendors("IBM")) |
| 1246 | return -ENODEV; |
| 1247 | |
| 1248 | /* Look for SMBS object */ |
| 1249 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); |
| 1250 | if (result) |
| 1251 | return result; |
| 1252 | |
| 1253 | if (strcmp("SMBS", path.pointer)) { |
| 1254 | result = -ENODEV; |
| 1255 | goto out; |
| 1256 | } |
| 1257 | |
| 1258 | /* Does it have the necessary (but misnamed) methods? */ |
| 1259 | result = -ENODEV; |
| 1260 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && |
| 1261 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && |
| 1262 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) |
| 1263 | result = 0; |
| 1264 | out: |
| 1265 | kfree(path.pointer); |
| 1266 | return result; |
| 1267 | } |
| 1268 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1269 | static void acpi_device_set_id(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1271 | acpi_status status; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1272 | struct acpi_device_info *info; |
Lv Zheng | 78e25fe | 2012-10-31 02:25:24 +0000 | [diff] [blame] | 1273 | struct acpi_pnp_device_id_list *cid_list; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1274 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1276 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | case ACPI_BUS_TYPE_DEVICE: |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1278 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1279 | acpi_add_id(device, ACPI_SYSTEM_HID); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1280 | break; |
| 1281 | } |
| 1282 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1283 | status = acpi_get_object_info(device->handle, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | if (ACPI_FAILURE(status)) { |
Harvey Harrison | 96b2dd1 | 2008-03-05 18:24:51 -0800 | [diff] [blame] | 1285 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1286 | return; |
| 1287 | } |
| 1288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | if (info->valid & ACPI_VALID_HID) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1290 | acpi_add_id(device, info->hardware_id.string); |
| 1291 | if (info->valid & ACPI_VALID_CID) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1292 | cid_list = &info->compatible_id_list; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1293 | for (i = 0; i < cid_list->count; i++) |
| 1294 | acpi_add_id(device, cid_list->ids[i].string); |
| 1295 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | if (info->valid & ACPI_VALID_ADR) { |
| 1297 | device->pnp.bus_address = info->address; |
| 1298 | device->flags.bus_address = 1; |
| 1299 | } |
Lv Zheng | ccf7804 | 2012-10-30 14:41:07 +0100 | [diff] [blame] | 1300 | if (info->valid & ACPI_VALID_UID) |
| 1301 | device->pnp.unique_id = kstrdup(info->unique_id.string, |
| 1302 | GFP_KERNEL); |
Zhang Rui | ae84333 | 2006-12-07 20:57:10 +0800 | [diff] [blame] | 1303 | |
Bjorn Helgaas | a83893ae | 2009-10-02 11:03:12 -0400 | [diff] [blame] | 1304 | kfree(info); |
| 1305 | |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1306 | /* |
| 1307 | * Some devices don't reliably have _HIDs & _CIDs, so add |
| 1308 | * synthetic HIDs to make sure drivers can find them. |
| 1309 | */ |
Thomas Renninger | c3d6de6 | 2008-08-01 17:37:55 +0200 | [diff] [blame] | 1310 | if (acpi_is_video_device(device)) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1311 | acpi_add_id(device, ACPI_VIDEO_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1312 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1313 | acpi_add_id(device, ACPI_BAY_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1314 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1315 | acpi_add_id(device, ACPI_DOCK_HID); |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1316 | else if (!acpi_ibm_smbus_match(device)) |
| 1317 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); |
Bjorn Helgaas | b7b30de | 2010-03-24 10:44:33 -0600 | [diff] [blame] | 1318 | else if (!acpi_device_hid(device) && |
| 1319 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
| 1320 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ |
| 1321 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
| 1322 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); |
| 1323 | } |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1324 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | break; |
| 1326 | case ACPI_BUS_TYPE_POWER: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1327 | acpi_add_id(device, ACPI_POWER_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | break; |
| 1329 | case ACPI_BUS_TYPE_PROCESSOR: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1330 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | case ACPI_BUS_TYPE_THERMAL: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1333 | acpi_add_id(device, ACPI_THERMAL_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | break; |
| 1335 | case ACPI_BUS_TYPE_POWER_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1336 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | break; |
| 1338 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1339 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | break; |
| 1341 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1342 | } |
| 1343 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1344 | static int acpi_device_set_context(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | { |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1346 | acpi_status status; |
| 1347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | /* |
| 1349 | * Context |
| 1350 | * ------- |
| 1351 | * Attach this 'struct acpi_device' to the ACPI object. This makes |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1352 | * resolutions from handle->device very efficient. Fixed hardware |
| 1353 | * devices have no handles, so we skip them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | */ |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1355 | if (!device->handle) |
| 1356 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1358 | status = acpi_attach_data(device->handle, |
| 1359 | acpi_bus_data_handler, device); |
| 1360 | if (ACPI_SUCCESS(status)) |
| 1361 | return 0; |
| 1362 | |
| 1363 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
| 1364 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | } |
| 1366 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1367 | static int acpi_add_single_object(struct acpi_device **child, |
| 1368 | acpi_handle handle, int type, |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1369 | unsigned long long sta, bool match_driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | { |
Bjorn Helgaas | 77c2488 | 2009-09-21 19:29:30 +0000 | [diff] [blame] | 1371 | int result; |
| 1372 | struct acpi_device *device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1373 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 1375 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1377 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1378 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1380 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1381 | INIT_LIST_HEAD(&device->pnp.ids); |
Bjorn Helgaas | caaa6ef | 2009-09-21 19:29:10 +0000 | [diff] [blame] | 1382 | device->device_type = type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | device->handle = handle; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1384 | device->parent = acpi_bus_get_parent(handle); |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1385 | STRUCT_TO_INT(device->status) = sta; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1386 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1387 | acpi_device_get_busid(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | |
| 1389 | /* |
| 1390 | * Flags |
| 1391 | * ----- |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1392 | * Note that we only look for object handles -- cannot evaluate objects |
| 1393 | * until we know the device is present and properly initialized. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | */ |
| 1395 | result = acpi_bus_get_flags(device); |
| 1396 | if (result) |
| 1397 | goto end; |
| 1398 | |
| 1399 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | * Initialize Device |
| 1401 | * ----------------- |
| 1402 | * TBD: Synch with Core's enumeration/initialization process. |
| 1403 | */ |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1404 | acpi_device_set_id(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | |
| 1406 | /* |
| 1407 | * Power Management |
| 1408 | * ---------------- |
| 1409 | */ |
| 1410 | if (device->flags.power_manageable) { |
| 1411 | result = acpi_bus_get_power_flags(device); |
| 1412 | if (result) |
| 1413 | goto end; |
| 1414 | } |
| 1415 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1416 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | * Wakeup device management |
| 1418 | *----------------------- |
| 1419 | */ |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1420 | acpi_bus_get_wakeup_device_flags(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | |
| 1422 | /* |
| 1423 | * Performance Management |
| 1424 | * ---------------------- |
| 1425 | */ |
| 1426 | if (device->flags.performance_manageable) { |
| 1427 | result = acpi_bus_get_perf_flags(device); |
| 1428 | if (result) |
| 1429 | goto end; |
| 1430 | } |
| 1431 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1432 | if ((result = acpi_device_set_context(device))) |
Len Brown | f61f925 | 2009-09-05 13:33:23 -0400 | [diff] [blame] | 1433 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1435 | device->flags.match_driver = match_driver; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1436 | result = acpi_device_register(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 1438 | end: |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1439 | if (!result) { |
| 1440 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 1441 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1442 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), |
| 1443 | (char *) buffer.pointer, |
| 1444 | device->parent ? dev_name(&device->parent->dev) : |
| 1445 | "(null)")); |
| 1446 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | *child = device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1448 | } else |
Hugh Dickins | 718fb0d | 2009-08-06 23:18:12 +0000 | [diff] [blame] | 1449 | acpi_device_release(&device->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1451 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1454 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
| 1455 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) |
| 1456 | |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1457 | static void acpi_bus_add_power_resource(acpi_handle handle) |
| 1458 | { |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1459 | struct acpi_device *device = NULL; |
| 1460 | |
| 1461 | acpi_bus_get_device(handle, &device); |
| 1462 | if (!device) |
| 1463 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1464 | ACPI_STA_DEFAULT, true); |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1465 | } |
| 1466 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1467 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
| 1468 | unsigned long long *sta) |
| 1469 | { |
| 1470 | acpi_status status; |
| 1471 | acpi_object_type acpi_type; |
| 1472 | |
| 1473 | status = acpi_get_type(handle, &acpi_type); |
| 1474 | if (ACPI_FAILURE(status)) |
| 1475 | return -ENODEV; |
| 1476 | |
| 1477 | switch (acpi_type) { |
| 1478 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
| 1479 | case ACPI_TYPE_DEVICE: |
| 1480 | *type = ACPI_BUS_TYPE_DEVICE; |
| 1481 | status = acpi_bus_get_status_handle(handle, sta); |
| 1482 | if (ACPI_FAILURE(status)) |
| 1483 | return -ENODEV; |
| 1484 | break; |
| 1485 | case ACPI_TYPE_PROCESSOR: |
| 1486 | *type = ACPI_BUS_TYPE_PROCESSOR; |
| 1487 | status = acpi_bus_get_status_handle(handle, sta); |
| 1488 | if (ACPI_FAILURE(status)) |
| 1489 | return -ENODEV; |
| 1490 | break; |
| 1491 | case ACPI_TYPE_THERMAL: |
| 1492 | *type = ACPI_BUS_TYPE_THERMAL; |
| 1493 | *sta = ACPI_STA_DEFAULT; |
| 1494 | break; |
| 1495 | case ACPI_TYPE_POWER: |
| 1496 | *type = ACPI_BUS_TYPE_POWER; |
| 1497 | *sta = ACPI_STA_DEFAULT; |
| 1498 | break; |
| 1499 | default: |
| 1500 | return -ENODEV; |
| 1501 | } |
| 1502 | |
| 1503 | return 0; |
| 1504 | } |
| 1505 | |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1506 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used, |
| 1507 | void *not_used, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1509 | struct acpi_device *device = NULL; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1510 | int type; |
| 1511 | unsigned long long sta; |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1512 | acpi_status status; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1513 | int result; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1514 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1515 | acpi_bus_get_device(handle, &device); |
| 1516 | if (device) |
| 1517 | goto out; |
| 1518 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1519 | result = acpi_bus_type_and_status(handle, &type, &sta); |
| 1520 | if (result) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1521 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1523 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1524 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
Rafael J. Wysocki | 86e4e20 | 2011-01-06 23:40:00 +0100 | [diff] [blame] | 1525 | struct acpi_device_wakeup wakeup; |
| 1526 | acpi_handle temp; |
| 1527 | |
| 1528 | status = acpi_get_handle(handle, "_PRW", &temp); |
| 1529 | if (ACPI_SUCCESS(status)) |
| 1530 | acpi_bus_extract_wakeup_device_power_package(handle, |
| 1531 | &wakeup); |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1532 | return AE_CTRL_DEPTH; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1533 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | |
Rafael J. Wysocki | f95988d | 2013-01-07 21:17:02 +0100 | [diff] [blame] | 1535 | acpi_add_single_object(&device, handle, type, sta, |
| 1536 | type == ACPI_BUS_TYPE_POWER); |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1537 | if (!device) |
| 1538 | return AE_CTRL_DEPTH; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1539 | |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1540 | device->flags.match_driver = true; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1541 | |
Rafael J. Wysocki | 4002bf3 | 2012-12-21 00:36:44 +0100 | [diff] [blame] | 1542 | out: |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1543 | if (!*return_value) |
| 1544 | *return_value = device; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1545 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1546 | return AE_OK; |
| 1547 | } |
| 1548 | |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1549 | static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used, |
| 1550 | void *not_used, void **ret_not_used) |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1551 | { |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1552 | acpi_status status = AE_OK; |
| 1553 | struct acpi_device *device; |
| 1554 | unsigned long long sta_not_used; |
| 1555 | int type_not_used; |
| 1556 | |
| 1557 | /* |
| 1558 | * Ignore errors ignored by acpi_bus_check_add() to avoid terminating |
| 1559 | * namespace walks prematurely. |
| 1560 | */ |
| 1561 | if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used)) |
| 1562 | return AE_OK; |
| 1563 | |
| 1564 | if (acpi_bus_get_device(handle, &device)) |
| 1565 | return AE_CTRL_DEPTH; |
| 1566 | |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1567 | if (!acpi_match_device_ids(device, acpi_platform_device_ids)) { |
| 1568 | /* This is a known good platform device. */ |
| 1569 | acpi_create_platform_device(device); |
Mika Westerberg | abe9921 | 2013-01-11 22:08:09 +0100 | [diff] [blame] | 1570 | } else if (device_attach(&device->dev) < 0) { |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1571 | status = AE_CTRL_DEPTH; |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1572 | } |
| 1573 | return status; |
| 1574 | } |
| 1575 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1576 | /** |
| 1577 | * acpi_bus_scan - Add ACPI device node objects in a given namespace scope. |
| 1578 | * @handle: Root of the namespace scope to scan. |
| 1579 | * |
| 1580 | * Scan a given ACPI tree (probably recently hot-plugged) and create and add |
| 1581 | * found devices. |
| 1582 | * |
| 1583 | * If no devices were found, -ENODEV is returned, but it does not mean that |
| 1584 | * there has been a real error. There just have been no suitable ACPI objects |
| 1585 | * in the table trunk from which the kernel could create a device and add an |
| 1586 | * appropriate driver. |
| 1587 | */ |
| 1588 | int acpi_bus_scan(acpi_handle handle) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1589 | { |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1590 | void *device = NULL; |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1591 | int error = 0; |
| 1592 | |
| 1593 | mutex_lock(&acpi_scan_lock); |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1594 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1595 | if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device))) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1596 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | e386309 | 2012-12-21 00:36:47 +0100 | [diff] [blame] | 1597 | acpi_bus_check_add, NULL, NULL, &device); |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1598 | |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1599 | if (!device) |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1600 | error = -ENODEV; |
| 1601 | 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] | 1602 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Rafael J. Wysocki | 0fc300b | 2012-12-21 00:36:41 +0100 | [diff] [blame] | 1603 | acpi_bus_device_attach, NULL, NULL, NULL); |
Rafael J. Wysocki | 805d410f | 2012-12-21 00:36:39 +0100 | [diff] [blame] | 1604 | |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1605 | mutex_unlock(&acpi_scan_lock); |
| 1606 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | } |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1608 | EXPORT_SYMBOL(acpi_bus_scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1610 | static acpi_status acpi_bus_device_detach(acpi_handle handle, u32 lvl_not_used, |
| 1611 | void *not_used, void **ret_not_used) |
| 1612 | { |
| 1613 | struct acpi_device *device = NULL; |
| 1614 | |
| 1615 | if (!acpi_bus_get_device(handle, &device)) { |
| 1616 | device->removal_type = ACPI_BUS_REMOVAL_EJECT; |
| 1617 | device_release_driver(&device->dev); |
| 1618 | } |
| 1619 | return AE_OK; |
| 1620 | } |
| 1621 | |
| 1622 | static acpi_status acpi_bus_remove(acpi_handle handle, u32 lvl_not_used, |
| 1623 | void *not_used, void **ret_not_used) |
| 1624 | { |
| 1625 | struct acpi_device *device = NULL; |
| 1626 | |
| 1627 | if (!acpi_bus_get_device(handle, &device)) |
| 1628 | acpi_device_unregister(device); |
| 1629 | |
| 1630 | return AE_OK; |
| 1631 | } |
| 1632 | |
Rafael J. Wysocki | bfee26d | 2013-01-26 00:27:44 +0100 | [diff] [blame] | 1633 | void acpi_bus_trim(struct acpi_device *start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | { |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1635 | mutex_lock(&acpi_scan_lock); |
| 1636 | |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 1637 | /* |
Rafael J. Wysocki | 05404d8 | 2013-01-15 13:24:13 +0100 | [diff] [blame] | 1638 | * Execute acpi_bus_device_detach() as a post-order callback to detach |
| 1639 | * all ACPI drivers from the device nodes being removed. |
| 1640 | */ |
| 1641 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, |
| 1642 | acpi_bus_device_detach, NULL, NULL); |
| 1643 | acpi_bus_device_detach(start->handle, 0, NULL, NULL); |
| 1644 | /* |
Rafael J. Wysocki | cecdb19 | 2013-01-15 13:24:02 +0100 | [diff] [blame] | 1645 | * Execute acpi_bus_remove() as a post-order callback to remove device |
| 1646 | * nodes in the given namespace scope. |
| 1647 | */ |
| 1648 | acpi_walk_namespace(ACPI_TYPE_ANY, start->handle, ACPI_UINT32_MAX, NULL, |
| 1649 | acpi_bus_remove, NULL, NULL); |
| 1650 | acpi_bus_remove(start->handle, 0, NULL, NULL); |
Rafael J. Wysocki | c511cc1 | 2013-01-27 21:17:29 +0100 | [diff] [blame] | 1651 | |
| 1652 | mutex_unlock(&acpi_scan_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
Kristen Accardi | ceaba66 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 1654 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
| 1655 | |
Bjorn Helgaas | e8b945c | 2009-09-21 19:28:59 +0000 | [diff] [blame] | 1656 | static int acpi_bus_scan_fixed(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1658 | int result = 0; |
| 1659 | struct acpi_device *device = NULL; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1660 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | /* |
| 1662 | * Enumerate all fixed-feature devices. |
| 1663 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 1664 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1665 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1666 | ACPI_BUS_TYPE_POWER_BUTTON, |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1667 | ACPI_STA_DEFAULT, true); |
Daniel Drake | c10d7a13 | 2012-05-10 00:08:43 +0100 | [diff] [blame] | 1668 | device_init_wakeup(&device->dev, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1669 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 1671 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1672 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1673 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
Rafael J. Wysocki | 209d3b1 | 2012-12-21 00:36:48 +0100 | [diff] [blame] | 1674 | ACPI_STA_DEFAULT, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1675 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1677 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | } |
| 1679 | |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 1680 | int __init acpi_scan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | { |
| 1682 | int result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | |
Patrick Mochel | 5b32726 | 2006-05-10 10:33:00 -0400 | [diff] [blame] | 1684 | result = bus_register(&acpi_bus_type); |
| 1685 | if (result) { |
| 1686 | /* We don't want to quit even if we failed to add suspend/resume */ |
| 1687 | printk(KERN_ERR PREFIX "Could not register bus type\n"); |
| 1688 | } |
| 1689 | |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 1690 | acpi_power_init(); |
Rafael J. Wysocki | 92ef2a2 | 2012-12-21 00:36:40 +0100 | [diff] [blame] | 1691 | acpi_pci_root_init(); |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 1692 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | * Enumerate devices in the ACPI namespace. |
| 1695 | */ |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1696 | result = acpi_bus_scan(ACPI_ROOT_OBJECT); |
| 1697 | if (result) |
| 1698 | return result; |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 1699 | |
Rafael J. Wysocki | 0cd6ac5 | 2012-12-21 00:36:49 +0100 | [diff] [blame] | 1700 | result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | if (result) |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1702 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | |
Rafael J. Wysocki | b8bd759 | 2013-01-19 01:27:35 +0100 | [diff] [blame] | 1704 | result = acpi_bus_scan_fixed(); |
| 1705 | if (result) { |
| 1706 | acpi_device_unregister(acpi_root); |
| 1707 | return result; |
| 1708 | } |
| 1709 | |
| 1710 | acpi_update_all_gpes(); |
| 1711 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | } |