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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | #include <acpi/acpi_drivers.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | |
Bjorn Helgaas | e60cc7a | 2009-03-13 12:08:26 -0600 | [diff] [blame] | 16 | #include "internal.h" |
| 17 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #define _COMPONENT ACPI_BUS_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 19 | ACPI_MODULE_NAME("scan"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 21 | extern struct acpi_device *acpi_root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | |
| 23 | #define ACPI_BUS_CLASS "system_bus" |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 24 | #define ACPI_BUS_HID "LNXSYBUS" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
| 26 | |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 27 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
| 28 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 29 | static const char *dummy_hid = "device"; |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | static LIST_HEAD(acpi_device_list); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 32 | static LIST_HEAD(acpi_bus_id_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 33 | DEFINE_MUTEX(acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | LIST_HEAD(acpi_wakeup_device_list); |
| 35 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 36 | struct acpi_device_bus_id{ |
Zhang Rui | bb09585 | 2007-01-04 15:03:18 +0800 | [diff] [blame] | 37 | char bus_id[15]; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 38 | unsigned int instance_no; |
| 39 | struct list_head node; |
| 40 | }; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 41 | |
| 42 | /* |
| 43 | * Creates hid/cid(s) string needed for modalias and uevent |
| 44 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: |
| 45 | * char *modalias: "acpi:IBM0001:ACPI0001" |
| 46 | */ |
Adrian Bunk | b3e572d | 2007-08-14 23:22:35 +0200 | [diff] [blame] | 47 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
| 48 | int size) |
| 49 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 50 | int len; |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 51 | int count; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 52 | struct acpi_hardware_id *id; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 53 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 54 | if (list_empty(&acpi_dev->pnp.ids)) |
| 55 | return 0; |
| 56 | |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 57 | len = snprintf(modalias, size, "acpi:"); |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 58 | size -= len; |
| 59 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 60 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
| 61 | count = snprintf(&modalias[len], size, "%s:", id->id); |
Zhang Rui | 5c9fcb5 | 2008-03-20 16:40:32 +0800 | [diff] [blame] | 62 | if (count < 0 || count >= size) |
| 63 | return -EINVAL; |
| 64 | len += count; |
| 65 | size -= count; |
| 66 | } |
| 67 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 68 | modalias[len] = '\0'; |
| 69 | return len; |
| 70 | } |
| 71 | |
| 72 | static ssize_t |
| 73 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 74 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 75 | int len; |
| 76 | |
| 77 | /* Device has no HID and no CID or string is >1024 */ |
| 78 | len = create_modalias(acpi_dev, buf, 1024); |
| 79 | if (len <= 0) |
| 80 | return 0; |
| 81 | buf[len++] = '\n'; |
| 82 | return len; |
| 83 | } |
| 84 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); |
| 85 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 86 | /** |
| 87 | * acpi_bus_hot_remove_device: hot-remove a device and its children |
| 88 | * @context: struct acpi_eject_event pointer (freed in this func) |
| 89 | * |
| 90 | * Hot-remove a device and its children. This function frees up the |
| 91 | * memory space passed by arg context, so that the caller may call |
| 92 | * this function asynchronously through acpi_os_hotplug_execute(). |
| 93 | */ |
| 94 | void acpi_bus_hot_remove_device(void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 96 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 97 | struct acpi_device *device; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 98 | acpi_handle handle = ej_event->handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | struct acpi_object_list arg_list; |
| 100 | union acpi_object arg; |
| 101 | acpi_status status = AE_OK; |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 102 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 104 | if (acpi_bus_get_device(handle, &device)) |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 105 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 107 | if (!device) |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 108 | goto err_out; |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 109 | |
| 110 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 111 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 112 | |
| 113 | if (acpi_bus_trim(device, 1)) { |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 114 | printk(KERN_ERR PREFIX |
| 115 | "Removing device failed\n"); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 116 | goto err_out; |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | /* power off device */ |
| 120 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); |
| 121 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) |
Lin Ming | 55ac9a0 | 2008-09-28 14:51:56 +0800 | [diff] [blame] | 122 | printk(KERN_WARNING PREFIX |
| 123 | "Power-off device failed\n"); |
Zhang Rui | 26d4686 | 2008-04-29 02:35:48 -0400 | [diff] [blame] | 124 | |
| 125 | if (device->flags.lockable) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | arg_list.count = 1; |
| 127 | arg_list.pointer = &arg; |
| 128 | arg.type = ACPI_TYPE_INTEGER; |
| 129 | arg.integer.value = 0; |
| 130 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); |
| 131 | } |
| 132 | |
| 133 | arg_list.count = 1; |
| 134 | arg_list.pointer = &arg; |
| 135 | arg.type = ACPI_TYPE_INTEGER; |
| 136 | arg.integer.value = 1; |
| 137 | |
| 138 | /* |
| 139 | * TBD: _EJD support. |
| 140 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 142 | if (ACPI_FAILURE(status)) { |
| 143 | if (status != AE_NOT_FOUND) |
| 144 | printk(KERN_WARNING PREFIX |
| 145 | "Eject device failed\n"); |
| 146 | goto err_out; |
| 147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 149 | kfree(context); |
| 150 | return; |
| 151 | |
| 152 | err_out: |
| 153 | /* Inform firmware the hot-remove operation has completed w/ error */ |
| 154 | (void) acpi_evaluate_hotplug_ost(handle, |
| 155 | ej_event->event, ost_code, NULL); |
| 156 | kfree(context); |
Zhang Rui | c8d72a5 | 2009-06-22 11:31:16 +0800 | [diff] [blame] | 157 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | static ssize_t |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 161 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
| 162 | const char *buf, size_t count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | int ret = count; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 165 | acpi_status status; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 166 | acpi_object_type type = 0; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 167 | struct acpi_device *acpi_device = to_acpi_device(d); |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 168 | struct acpi_eject_event *ej_event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | if ((!count) || (buf[0] != '1')) { |
| 171 | return -EINVAL; |
| 172 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | #ifndef FORCE_EJECT |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 174 | if (acpi_device->driver == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | ret = -ENODEV; |
| 176 | goto err; |
| 177 | } |
| 178 | #endif |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 179 | status = acpi_get_type(acpi_device->handle, &type); |
| 180 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | ret = -ENODEV; |
| 182 | goto err; |
| 183 | } |
| 184 | |
Toshi Kani | c4753e5 | 2012-05-23 20:25:20 -0600 | [diff] [blame] | 185 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
| 186 | if (!ej_event) { |
| 187 | ret = -ENOMEM; |
| 188 | goto err; |
| 189 | } |
| 190 | |
| 191 | ej_event->handle = acpi_device->handle; |
| 192 | if (acpi_device->flags.eject_pending) { |
| 193 | /* event originated from ACPI eject notification */ |
| 194 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; |
| 195 | acpi_device->flags.eject_pending = 0; |
| 196 | } else { |
| 197 | /* event originated from user */ |
| 198 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; |
| 199 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, |
| 200 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); |
| 201 | } |
| 202 | |
| 203 | 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] | 204 | err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 208 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 210 | static ssize_t |
| 211 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 212 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Bjorn Helgaas | ea8d82f | 2009-09-21 13:35:09 -0600 | [diff] [blame] | 214 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 215 | } |
| 216 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
| 217 | |
| 218 | static ssize_t |
| 219 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { |
| 220 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 221 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 222 | int result; |
| 223 | |
| 224 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 225 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 226 | goto end; |
| 227 | |
| 228 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
| 229 | kfree(path.pointer); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 230 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 231 | return result; |
| 232 | } |
| 233 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
| 234 | |
| 235 | static int acpi_device_setup_files(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 237 | acpi_status status; |
| 238 | acpi_handle temp; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 239 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 241 | /* |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 242 | * Devices gotten from FADT don't have a "path" attribute |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 243 | */ |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 244 | if (dev->handle) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 245 | result = device_create_file(&dev->dev, &dev_attr_path); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 246 | if (result) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 247 | goto end; |
| 248 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 250 | if (!list_empty(&dev->pnp.ids)) { |
| 251 | result = device_create_file(&dev->dev, &dev_attr_hid); |
| 252 | if (result) |
| 253 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 255 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
| 256 | if (result) |
| 257 | goto end; |
| 258 | } |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 259 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 260 | /* |
| 261 | * If device has _EJ0, 'eject' file is created that is used to trigger |
| 262 | * hot-removal function from userland. |
| 263 | */ |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 264 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
| 265 | if (ACPI_SUCCESS(status)) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 266 | result = device_create_file(&dev->dev, &dev_attr_eject); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 267 | end: |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 268 | return result; |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 269 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 271 | static void acpi_device_remove_files(struct acpi_device *dev) |
| 272 | { |
| 273 | acpi_status status; |
| 274 | acpi_handle temp; |
| 275 | |
| 276 | /* |
| 277 | * If device has _EJ0, 'eject' file is created that is used to trigger |
| 278 | * hot-removal function from userland. |
| 279 | */ |
| 280 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
| 281 | if (ACPI_SUCCESS(status)) |
| 282 | device_remove_file(&dev->dev, &dev_attr_eject); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 283 | |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 284 | device_remove_file(&dev->dev, &dev_attr_modalias); |
| 285 | device_remove_file(&dev->dev, &dev_attr_hid); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 286 | if (dev->handle) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 287 | device_remove_file(&dev->dev, &dev_attr_path); |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | /* -------------------------------------------------------------------------- |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 290 | ACPI Bus operations |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | -------------------------------------------------------------------------- */ |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 292 | |
| 293 | int acpi_match_device_ids(struct acpi_device *device, |
| 294 | const struct acpi_device_id *ids) |
| 295 | { |
| 296 | const struct acpi_device_id *id; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 297 | struct acpi_hardware_id *hwid; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 298 | |
Zhao Yakui | 39a0ad8 | 2008-08-11 13:40:22 +0800 | [diff] [blame] | 299 | /* |
| 300 | * If the device is not present, it is unnecessary to load device |
| 301 | * driver for it. |
| 302 | */ |
| 303 | if (!device->status.present) |
| 304 | return -ENODEV; |
| 305 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 306 | for (id = ids; id->id[0]; id++) |
| 307 | list_for_each_entry(hwid, &device->pnp.ids, list) |
| 308 | if (!strcmp((char *) id->id, hwid->id)) |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 309 | return 0; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 310 | |
| 311 | return -ENOENT; |
| 312 | } |
| 313 | EXPORT_SYMBOL(acpi_match_device_ids); |
| 314 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 315 | static void acpi_free_ids(struct acpi_device *device) |
| 316 | { |
| 317 | struct acpi_hardware_id *id, *tmp; |
| 318 | |
| 319 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { |
| 320 | kfree(id->id); |
| 321 | kfree(id); |
| 322 | } |
| 323 | } |
| 324 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 325 | static void acpi_device_release(struct device *dev) |
| 326 | { |
| 327 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 328 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 329 | acpi_free_ids(acpi_dev); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 330 | kfree(acpi_dev); |
| 331 | } |
| 332 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 333 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
| 334 | { |
| 335 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 336 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); |
| 337 | |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 338 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 339 | } |
| 340 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 341 | 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] | 342 | { |
| 343 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 344 | int len; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 345 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 346 | if (list_empty(&acpi_dev->pnp.ids)) |
| 347 | return 0; |
| 348 | |
Kay Sievers | 7eff2e7 | 2007-08-14 15:15:12 +0200 | [diff] [blame] | 349 | if (add_uevent_var(env, "MODALIAS=")) |
| 350 | return -ENOMEM; |
| 351 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], |
| 352 | sizeof(env->buf) - env->buflen); |
| 353 | if (len >= (sizeof(env->buf) - env->buflen)) |
| 354 | return -ENOMEM; |
| 355 | env->buflen += len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | return 0; |
| 357 | } |
| 358 | |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 359 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
| 360 | { |
| 361 | struct acpi_device *device = data; |
| 362 | |
| 363 | device->driver->ops.notify(device, event); |
| 364 | } |
| 365 | |
| 366 | static acpi_status acpi_device_notify_fixed(void *data) |
| 367 | { |
| 368 | struct acpi_device *device = data; |
| 369 | |
Bjorn Helgaas | 53de535 | 2009-08-31 22:32:20 +0000 | [diff] [blame] | 370 | /* Fixed hardware devices have no handles */ |
| 371 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 372 | return AE_OK; |
| 373 | } |
| 374 | |
| 375 | static int acpi_device_install_notify_handler(struct acpi_device *device) |
| 376 | { |
| 377 | acpi_status status; |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 378 | |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 379 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 380 | status = |
| 381 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 382 | acpi_device_notify_fixed, |
| 383 | device); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 384 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 385 | status = |
| 386 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 387 | acpi_device_notify_fixed, |
| 388 | device); |
| 389 | else |
| 390 | status = acpi_install_notify_handler(device->handle, |
| 391 | ACPI_DEVICE_NOTIFY, |
| 392 | acpi_device_notify, |
| 393 | device); |
| 394 | |
| 395 | if (ACPI_FAILURE(status)) |
| 396 | return -EINVAL; |
| 397 | return 0; |
| 398 | } |
| 399 | |
| 400 | static void acpi_device_remove_notify_handler(struct acpi_device *device) |
| 401 | { |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 402 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 403 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
| 404 | acpi_device_notify_fixed); |
Bjorn Helgaas | ccba2a3 | 2009-09-21 19:29:15 +0000 | [diff] [blame] | 405 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 406 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
| 407 | acpi_device_notify_fixed); |
| 408 | else |
| 409 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, |
| 410 | acpi_device_notify); |
| 411 | } |
| 412 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 413 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
| 414 | static int acpi_start_single_object(struct acpi_device *); |
| 415 | static int acpi_device_probe(struct device * dev) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 416 | { |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 417 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 418 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); |
| 419 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 421 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); |
| 422 | if (!ret) { |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 423 | if (acpi_dev->bus_ops.acpi_op_start) |
| 424 | acpi_start_single_object(acpi_dev); |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 425 | |
| 426 | if (acpi_drv->ops.notify) { |
| 427 | ret = acpi_device_install_notify_handler(acpi_dev); |
| 428 | if (ret) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 429 | if (acpi_drv->ops.remove) |
| 430 | acpi_drv->ops.remove(acpi_dev, |
| 431 | acpi_dev->removal_type); |
| 432 | return ret; |
| 433 | } |
| 434 | } |
| 435 | |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 436 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 437 | "Found driver [%s] for device [%s]\n", |
| 438 | acpi_drv->name, acpi_dev->pnp.bus_id)); |
| 439 | get_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 440 | } |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 441 | return ret; |
| 442 | } |
| 443 | |
| 444 | static int acpi_device_remove(struct device * dev) |
| 445 | { |
| 446 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
| 447 | struct acpi_driver *acpi_drv = acpi_dev->driver; |
| 448 | |
| 449 | if (acpi_drv) { |
Bjorn Helgaas | 46ec859 | 2009-03-30 17:48:13 +0000 | [diff] [blame] | 450 | if (acpi_drv->ops.notify) |
| 451 | acpi_device_remove_notify_handler(acpi_dev); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 452 | if (acpi_drv->ops.remove) |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 453 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 454 | } |
| 455 | acpi_dev->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 456 | acpi_dev->driver_data = NULL; |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 457 | |
| 458 | put_device(dev); |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 459 | return 0; |
| 460 | } |
| 461 | |
David Brownell | 55955aa | 2007-05-08 00:28:35 -0700 | [diff] [blame] | 462 | struct bus_type acpi_bus_type = { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 463 | .name = "acpi", |
Patrick Mochel | 5d9464a | 2006-12-07 20:56:27 +0800 | [diff] [blame] | 464 | .match = acpi_bus_match, |
| 465 | .probe = acpi_device_probe, |
| 466 | .remove = acpi_device_remove, |
| 467 | .uevent = acpi_device_uevent, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | }; |
| 469 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 470 | static int acpi_device_register(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 472 | int result; |
| 473 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
| 474 | int found = 0; |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | /* |
| 477 | * Linkage |
| 478 | * ------- |
| 479 | * Link this device to its parent and siblings. |
| 480 | */ |
| 481 | INIT_LIST_HEAD(&device->children); |
| 482 | INIT_LIST_HEAD(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | INIT_LIST_HEAD(&device->wakeup_list); |
Lan Tianyu | 1033f90 | 2012-08-17 14:44:09 +0800 | [diff] [blame^] | 484 | INIT_LIST_HEAD(&device->physical_node_list); |
| 485 | mutex_init(&device->physical_node_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 487 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
| 488 | if (!new_bus_id) { |
| 489 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
| 490 | return -ENOMEM; |
| 491 | } |
| 492 | |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 493 | mutex_lock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 494 | /* |
| 495 | * Find suitable bus_id and instance number in acpi_bus_id_list |
| 496 | * If failed, create one and link it into acpi_bus_id_list |
| 497 | */ |
| 498 | 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] | 499 | if (!strcmp(acpi_device_bus_id->bus_id, |
| 500 | acpi_device_hid(device))) { |
| 501 | acpi_device_bus_id->instance_no++; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 502 | found = 1; |
| 503 | kfree(new_bus_id); |
| 504 | break; |
| 505 | } |
| 506 | } |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 507 | if (!found) { |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 508 | acpi_device_bus_id = new_bus_id; |
Bjorn Helgaas | 1131b93 | 2009-09-21 13:35:29 -0600 | [diff] [blame] | 509 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 510 | acpi_device_bus_id->instance_no = 0; |
| 511 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); |
| 512 | } |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 513 | 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] | 514 | |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 515 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | list_add_tail(&device->node, &device->parent->children); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | if (device->wakeup.flags.valid) |
| 519 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 520 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 522 | if (device->parent) |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 523 | device->dev.parent = &device->parent->dev; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 524 | device->dev.bus = &acpi_bus_type; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 525 | device->dev.release = &acpi_device_release; |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 526 | result = device_register(&device->dev); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 527 | if (result) { |
Alex Chiang | 8b12b92 | 2009-05-14 08:31:32 -0600 | [diff] [blame] | 528 | dev_err(&device->dev, "Error registering device\n"); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 529 | goto end; |
| 530 | } |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 531 | |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 532 | result = acpi_device_setup_files(device); |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 533 | if (result) |
Kay Sievers | 0794469 | 2008-10-30 01:18:59 +0100 | [diff] [blame] | 534 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
| 535 | dev_name(&device->dev)); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 536 | |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 537 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 538 | return 0; |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 539 | end: |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 540 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 541 | if (device->parent) |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 542 | list_del(&device->node); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 543 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 544 | mutex_unlock(&acpi_device_lock); |
Zhang Rui | e49bd2dd | 2006-12-08 17:23:43 +0800 | [diff] [blame] | 545 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | |
| 548 | static void acpi_device_unregister(struct acpi_device *device, int type) |
| 549 | { |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 550 | mutex_lock(&acpi_device_lock); |
Len Brown | 33b5715 | 2008-12-15 22:09:26 -0500 | [diff] [blame] | 551 | if (device->parent) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | list_del(&device->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
| 554 | list_del(&device->wakeup_list); |
Shaohua Li | 9090589 | 2009-04-07 10:24:29 +0800 | [diff] [blame] | 555 | mutex_unlock(&acpi_device_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | |
| 557 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 558 | |
Patrick Mochel | f883d9d | 2006-12-07 20:56:38 +0800 | [diff] [blame] | 559 | acpi_device_remove_files(device); |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 560 | device_unregister(&device->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 563 | /* -------------------------------------------------------------------------- |
| 564 | Driver Management |
| 565 | -------------------------------------------------------------------------- */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 567 | * acpi_bus_driver_init - add a device to a driver |
| 568 | * @device: the device to add and initialize |
| 569 | * @driver: driver for the device |
| 570 | * |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 571 | * Used to initialize a device via its device driver. Called whenever a |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 572 | * driver is bound to a device. Invokes the driver's add() ops. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | */ |
| 574 | static int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 575 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 577 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | if (!device || !driver) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 580 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | |
| 582 | if (!driver->ops.add) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 583 | return -ENOSYS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
| 585 | result = driver->ops.add(device); |
| 586 | if (result) { |
| 587 | device->driver = NULL; |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 588 | device->driver_data = NULL; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 589 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | device->driver = driver; |
| 593 | |
| 594 | /* |
| 595 | * TBD - Configuration Management: Assign resources to device based |
| 596 | * upon possible configuration and currently allocated resources. |
| 597 | */ |
| 598 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 599 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 600 | "Driver successfully bound to device\n")); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 601 | return 0; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 602 | } |
| 603 | |
Adrian Bunk | 8713cbe | 2005-09-02 17:16:48 -0400 | [diff] [blame] | 604 | static int acpi_start_single_object(struct acpi_device *device) |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 605 | { |
| 606 | int result = 0; |
| 607 | struct acpi_driver *driver; |
| 608 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 609 | |
| 610 | if (!(driver = device->driver)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 611 | return 0; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | if (driver->ops.start) { |
| 614 | result = driver->ops.start(device); |
| 615 | if (result && driver->ops.remove) |
| 616 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | } |
| 618 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 619 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | } |
| 621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 623 | * acpi_bus_register_driver - register a driver with the ACPI bus |
| 624 | * @driver: driver being registered |
| 625 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | * Registers a driver with the ACPI bus. Searches the namespace for all |
Bjorn Helgaas | 9d9f749 | 2006-03-28 17:04:00 -0500 | [diff] [blame] | 627 | * devices that match the driver's criteria and binds. Returns zero for |
| 628 | * success or a negative error status for failure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 630 | int acpi_bus_register_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 632 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 633 | |
| 634 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 635 | return -ENODEV; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 636 | driver->drv.name = driver->name; |
| 637 | driver->drv.bus = &acpi_bus_type; |
| 638 | driver->drv.owner = driver->owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 640 | ret = driver_register(&driver->drv); |
| 641 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 644 | EXPORT_SYMBOL(acpi_bus_register_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | |
| 646 | /** |
Randy Dunlap | d758a8f | 2006-01-06 01:31:00 -0500 | [diff] [blame] | 647 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus |
| 648 | * @driver: driver to unregister |
| 649 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | * Unregisters a driver with the ACPI bus. Searches the namespace for all |
| 651 | * devices that match the driver's criteria and unbinds. |
| 652 | */ |
Bjorn Helgaas | 06ea8e08 | 2006-04-27 05:25:00 -0400 | [diff] [blame] | 653 | void acpi_bus_unregister_driver(struct acpi_driver *driver) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | { |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 655 | driver_unregister(&driver->drv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 657 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | EXPORT_SYMBOL(acpi_bus_unregister_driver); |
| 659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | /* -------------------------------------------------------------------------- |
| 661 | Device Enumeration |
| 662 | -------------------------------------------------------------------------- */ |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 663 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
| 664 | { |
| 665 | acpi_status status; |
| 666 | int ret; |
| 667 | struct acpi_device *device; |
| 668 | |
| 669 | /* |
| 670 | * Fixed hardware devices do not appear in the namespace and do not |
| 671 | * have handles, but we fabricate acpi_devices for them, so we have |
| 672 | * to deal with them specially. |
| 673 | */ |
| 674 | if (handle == NULL) |
| 675 | return acpi_root; |
| 676 | |
| 677 | do { |
| 678 | status = acpi_get_parent(handle, &handle); |
| 679 | if (status == AE_NULL_ENTRY) |
| 680 | return NULL; |
| 681 | if (ACPI_FAILURE(status)) |
| 682 | return acpi_root; |
| 683 | |
| 684 | ret = acpi_bus_get_device(handle, &device); |
| 685 | if (ret == 0) |
| 686 | return device; |
| 687 | } while (1); |
| 688 | } |
| 689 | |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 690 | acpi_status |
| 691 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) |
| 692 | { |
| 693 | acpi_status status; |
| 694 | acpi_handle tmp; |
| 695 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 696 | union acpi_object *obj; |
| 697 | |
| 698 | status = acpi_get_handle(handle, "_EJD", &tmp); |
| 699 | if (ACPI_FAILURE(status)) |
| 700 | return status; |
| 701 | |
| 702 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); |
| 703 | if (ACPI_SUCCESS(status)) { |
| 704 | obj = buffer.pointer; |
Holger Macht | 3b5fee5 | 2008-02-14 13:40:34 +0100 | [diff] [blame] | 705 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
| 706 | ejd); |
Len Brown | c8f7a62 | 2006-07-09 17:22:28 -0400 | [diff] [blame] | 707 | kfree(buffer.pointer); |
| 708 | } |
| 709 | return status; |
| 710 | } |
| 711 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); |
| 712 | |
Bob Moore | 8e4319c | 2009-06-29 13:43:27 +0800 | [diff] [blame] | 713 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | { |
| 715 | |
| 716 | /* TBD */ |
| 717 | |
| 718 | return; |
| 719 | } |
| 720 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 721 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
| 722 | { |
| 723 | device->performance.state = ACPI_STATE_UNKNOWN; |
| 724 | return 0; |
| 725 | } |
| 726 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | static acpi_status |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 728 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
| 729 | struct acpi_device_wakeup *wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 731 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 732 | union acpi_object *package = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | union acpi_object *element = NULL; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 734 | acpi_status status; |
| 735 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 737 | if (!wakeup) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | return AE_BAD_PARAMETER; |
| 739 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 740 | /* _PRW */ |
| 741 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); |
| 742 | if (ACPI_FAILURE(status)) { |
| 743 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); |
| 744 | return status; |
| 745 | } |
| 746 | |
| 747 | package = (union acpi_object *)buffer.pointer; |
| 748 | |
| 749 | if (!package || (package->package.count < 2)) { |
| 750 | status = AE_BAD_DATA; |
| 751 | goto out; |
| 752 | } |
| 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | element = &(package->package.elements[0]); |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 755 | if (!element) { |
| 756 | status = AE_BAD_DATA; |
| 757 | goto out; |
| 758 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | if (element->type == ACPI_TYPE_PACKAGE) { |
| 760 | if ((element->package.count < 2) || |
| 761 | (element->package.elements[0].type != |
| 762 | ACPI_TYPE_LOCAL_REFERENCE) |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 763 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
| 764 | status = AE_BAD_DATA; |
| 765 | goto out; |
| 766 | } |
| 767 | wakeup->gpe_device = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | element->package.elements[0].reference.handle; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 769 | wakeup->gpe_number = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | (u32) element->package.elements[1].integer.value; |
| 771 | } else if (element->type == ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 772 | wakeup->gpe_device = NULL; |
| 773 | wakeup->gpe_number = element->integer.value; |
| 774 | } else { |
| 775 | status = AE_BAD_DATA; |
| 776 | goto out; |
| 777 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 778 | |
| 779 | element = &(package->package.elements[1]); |
| 780 | if (element->type != ACPI_TYPE_INTEGER) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 781 | status = AE_BAD_DATA; |
| 782 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | } |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 784 | wakeup->sleep_state = element->integer.value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 785 | |
| 786 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 787 | status = AE_NO_MEMORY; |
| 788 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 789 | } |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 790 | wakeup->resources.count = package->package.count - 2; |
| 791 | for (i = 0; i < wakeup->resources.count; i++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | element = &(package->package.elements[i + 2]); |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 793 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
| 794 | status = AE_BAD_DATA; |
| 795 | goto out; |
| 796 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 798 | wakeup->resources.handles[i] = element->reference.handle; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | } |
| 800 | |
Lin Ming | bba63a2 | 2010-12-13 13:39:17 +0800 | [diff] [blame] | 801 | 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] | 802 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 803 | out: |
| 804 | kfree(buffer.pointer); |
| 805 | |
| 806 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | } |
| 808 | |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 809 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | { |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 811 | struct acpi_device_id button_device_ids[] = { |
| 812 | {"PNP0C0D", 0}, |
| 813 | {"PNP0C0C", 0}, |
| 814 | {"PNP0C0E", 0}, |
| 815 | {"", 0}, |
| 816 | }; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 817 | acpi_status status; |
| 818 | acpi_event_status event_status; |
| 819 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 820 | device->wakeup.flags.notifier_present = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 821 | |
| 822 | /* Power button, Lid switch always enable wakeup */ |
| 823 | if (!acpi_match_device_ids(device, button_device_ids)) { |
| 824 | device->wakeup.flags.run_wake = 1; |
Rafael J. Wysocki | f2b56bc | 2011-01-06 23:34:22 +0100 | [diff] [blame] | 825 | device_set_wakeup_capable(&device->dev, true); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 826 | return; |
| 827 | } |
| 828 | |
Rafael J. Wysocki | e8e18c9 | 2010-07-08 00:42:51 +0200 | [diff] [blame] | 829 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
| 830 | device->wakeup.gpe_number, |
| 831 | &event_status); |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 832 | if (status == AE_OK) |
| 833 | device->wakeup.flags.run_wake = |
| 834 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); |
| 835 | } |
| 836 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 837 | 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] | 838 | { |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 839 | acpi_handle temp; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 840 | acpi_status status = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 841 | int psw_error; |
Thomas Renninger | 29b71a1 | 2007-07-23 14:43:51 +0200 | [diff] [blame] | 842 | |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 843 | /* Presence of _PRW indicates wake capable */ |
| 844 | status = acpi_get_handle(device->handle, "_PRW", &temp); |
| 845 | if (ACPI_FAILURE(status)) |
| 846 | return; |
| 847 | |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 848 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
| 849 | &device->wakeup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | if (ACPI_FAILURE(status)) { |
| 851 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 852 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | device->wakeup.flags.valid = 1; |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 856 | device->wakeup.prepare_count = 0; |
Rafael J. Wysocki | f517709 | 2010-02-17 23:41:49 +0100 | [diff] [blame] | 857 | acpi_bus_set_run_wake_flags(device); |
Zhao Yakui | 729b2bd | 2008-03-19 13:26:54 +0800 | [diff] [blame] | 858 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
| 859 | * system for the ACPI device with the _PRW object. |
| 860 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. |
| 861 | * So it is necessary to call _DSW object first. Only when it is not |
| 862 | * present will the _PSW object used. |
| 863 | */ |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 864 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
| 865 | if (psw_error) |
| 866 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 867 | "error in _DSW or _PSW evaluation\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | } |
| 869 | |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 870 | static void acpi_bus_add_power_resource(acpi_handle handle); |
| 871 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 872 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 873 | { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 874 | acpi_status status = 0; |
| 875 | acpi_handle handle = NULL; |
| 876 | u32 i = 0; |
| 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | |
| 879 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 880 | * Power Management Flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | */ |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 882 | status = acpi_get_handle(device->handle, "_PSC", &handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | if (ACPI_SUCCESS(status)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 884 | device->power.flags.explicit_get = 1; |
| 885 | status = acpi_get_handle(device->handle, "_IRC", &handle); |
| 886 | if (ACPI_SUCCESS(status)) |
| 887 | device->power.flags.inrush_current = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | /* |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 890 | * Enumerate supported power management states |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | */ |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 892 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 893 | struct acpi_device_power_state *ps = &device->power.states[i]; |
| 894 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 896 | /* Evaluate "_PRx" to se if power resources are referenced */ |
| 897 | acpi_evaluate_reference(device->handle, object_name, NULL, |
| 898 | &ps->resources); |
| 899 | if (ps->resources.count) { |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 900 | int j; |
| 901 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 902 | device->power.flags.power_resources = 1; |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 903 | for (j = 0; j < ps->resources.count; j++) |
| 904 | acpi_bus_add_power_resource(ps->resources.handles[j]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 907 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
| 908 | object_name[2] = 'S'; |
| 909 | status = acpi_get_handle(device->handle, object_name, &handle); |
Alex He | 3723997 | 2012-02-21 16:58:10 +0800 | [diff] [blame] | 910 | if (ACPI_SUCCESS(status)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 911 | ps->flags.explicit_set = 1; |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 912 | |
Lin Ming | 1cc0c99 | 2012-04-23 09:03:49 +0800 | [diff] [blame] | 913 | /* |
| 914 | * State is valid if there are means to put the device into it. |
| 915 | * D3hot is only valid if _PR3 present. |
| 916 | */ |
| 917 | if (ps->resources.count || |
| 918 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 919 | ps->flags.valid = 1; |
| 920 | |
| 921 | ps->power = -1; /* Unknown - driver assigned */ |
| 922 | ps->latency = -1; /* Unknown - driver assigned */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 924 | |
Zhang Rui | 9e89dde | 2006-12-07 20:56:16 +0800 | [diff] [blame] | 925 | /* Set defaults for D0 and D3 states (always valid) */ |
| 926 | device->power.states[ACPI_STATE_D0].flags.valid = 1; |
| 927 | device->power.states[ACPI_STATE_D0].power = 100; |
| 928 | device->power.states[ACPI_STATE_D3].flags.valid = 1; |
| 929 | device->power.states[ACPI_STATE_D3].power = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 931 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
| 932 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) |
| 933 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; |
| 934 | |
Rafael J. Wysocki | ade3e7f | 2010-11-25 00:08:36 +0100 | [diff] [blame] | 935 | acpi_bus_init_power(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | return 0; |
| 938 | } |
| 939 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 940 | static int acpi_bus_get_flags(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 942 | acpi_status status = AE_OK; |
| 943 | acpi_handle temp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
| 946 | /* Presence of _STA indicates 'dynamic_status' */ |
| 947 | status = acpi_get_handle(device->handle, "_STA", &temp); |
| 948 | if (ACPI_SUCCESS(status)) |
| 949 | device->flags.dynamic_status = 1; |
| 950 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | /* Presence of _RMV indicates 'removable' */ |
| 952 | status = acpi_get_handle(device->handle, "_RMV", &temp); |
| 953 | if (ACPI_SUCCESS(status)) |
| 954 | device->flags.removable = 1; |
| 955 | |
| 956 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ |
| 957 | status = acpi_get_handle(device->handle, "_EJD", &temp); |
| 958 | if (ACPI_SUCCESS(status)) |
| 959 | device->flags.ejectable = 1; |
| 960 | else { |
| 961 | status = acpi_get_handle(device->handle, "_EJ0", &temp); |
| 962 | if (ACPI_SUCCESS(status)) |
| 963 | device->flags.ejectable = 1; |
| 964 | } |
| 965 | |
| 966 | /* Presence of _LCK indicates 'lockable' */ |
| 967 | status = acpi_get_handle(device->handle, "_LCK", &temp); |
| 968 | if (ACPI_SUCCESS(status)) |
| 969 | device->flags.lockable = 1; |
| 970 | |
Rafael J. Wysocki | 7bed50c | 2011-04-26 11:33:18 +0200 | [diff] [blame] | 971 | /* Power resources cannot be power manageable. */ |
| 972 | if (device->device_type == ACPI_BUS_TYPE_POWER) |
| 973 | return 0; |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
| 976 | status = acpi_get_handle(device->handle, "_PS0", &temp); |
| 977 | if (ACPI_FAILURE(status)) |
| 978 | status = acpi_get_handle(device->handle, "_PR0", &temp); |
| 979 | if (ACPI_SUCCESS(status)) |
| 980 | device->flags.power_manageable = 1; |
| 981 | |
Joe Perches | 3c5f9be4 | 2008-02-03 17:06:17 +0200 | [diff] [blame] | 982 | /* TBD: Performance management */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 984 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | } |
| 986 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 987 | static void acpi_device_get_busid(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 989 | char bus_id[5] = { '?', 0 }; |
| 990 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; |
| 991 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | /* |
| 994 | * Bus ID |
| 995 | * ------ |
| 996 | * The device's Bus ID is simply the object name. |
| 997 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? |
| 998 | */ |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 999 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | strcpy(device->pnp.bus_id, "ACPI"); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1001 | return; |
| 1002 | } |
| 1003 | |
| 1004 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | case ACPI_BUS_TYPE_POWER_BUTTON: |
| 1006 | strcpy(device->pnp.bus_id, "PWRF"); |
| 1007 | break; |
| 1008 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
| 1009 | strcpy(device->pnp.bus_id, "SLPF"); |
| 1010 | break; |
| 1011 | default: |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1012 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | /* Clean up trailing underscores (if any) */ |
| 1014 | for (i = 3; i > 1; i--) { |
| 1015 | if (bus_id[i] == '_') |
| 1016 | bus_id[i] = '\0'; |
| 1017 | else |
| 1018 | break; |
| 1019 | } |
| 1020 | strcpy(device->pnp.bus_id, bus_id); |
| 1021 | break; |
| 1022 | } |
| 1023 | } |
| 1024 | |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1025 | /* |
| 1026 | * acpi_bay_match - see if a device is an ejectable driver bay |
| 1027 | * |
| 1028 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, |
| 1029 | * then we can safely call it an ejectable drive bay |
| 1030 | */ |
| 1031 | static int acpi_bay_match(struct acpi_device *device){ |
| 1032 | acpi_status status; |
| 1033 | acpi_handle handle; |
| 1034 | acpi_handle tmp; |
| 1035 | acpi_handle phandle; |
| 1036 | |
| 1037 | handle = device->handle; |
| 1038 | |
| 1039 | status = acpi_get_handle(handle, "_EJ0", &tmp); |
| 1040 | if (ACPI_FAILURE(status)) |
| 1041 | return -ENODEV; |
| 1042 | |
| 1043 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || |
| 1044 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || |
| 1045 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || |
| 1046 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) |
| 1047 | return 0; |
| 1048 | |
| 1049 | if (acpi_get_parent(handle, &phandle)) |
| 1050 | return -ENODEV; |
| 1051 | |
| 1052 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || |
| 1053 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || |
| 1054 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || |
| 1055 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) |
| 1056 | return 0; |
| 1057 | |
| 1058 | return -ENODEV; |
| 1059 | } |
| 1060 | |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1061 | /* |
| 1062 | * acpi_dock_match - see if a device has a _DCK method |
| 1063 | */ |
| 1064 | static int acpi_dock_match(struct acpi_device *device) |
| 1065 | { |
| 1066 | acpi_handle tmp; |
| 1067 | return acpi_get_handle(device->handle, "_DCK", &tmp); |
| 1068 | } |
| 1069 | |
Thomas Renninger | 620e112 | 2010-10-01 10:54:00 +0200 | [diff] [blame] | 1070 | const char *acpi_device_hid(struct acpi_device *device) |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1071 | { |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1072 | struct acpi_hardware_id *hid; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1073 | |
Thomas Renninger | 2b2ae7c | 2010-10-01 10:53:59 +0200 | [diff] [blame] | 1074 | if (list_empty(&device->pnp.ids)) |
| 1075 | return dummy_hid; |
| 1076 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1077 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
| 1078 | return hid->id; |
| 1079 | } |
| 1080 | EXPORT_SYMBOL(acpi_device_hid); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1081 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1082 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
| 1083 | { |
| 1084 | struct acpi_hardware_id *id; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1085 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1086 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
| 1087 | if (!id) |
| 1088 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1089 | |
Thomas Meyer | 581de59 | 2011-08-06 11:32:56 +0200 | [diff] [blame] | 1090 | id->id = kstrdup(dev_id, GFP_KERNEL); |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1091 | if (!id->id) { |
| 1092 | kfree(id); |
| 1093 | return; |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1094 | } |
| 1095 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1096 | list_add_tail(&id->list, &device->pnp.ids); |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1097 | } |
| 1098 | |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1099 | /* |
| 1100 | * Old IBM workstations have a DSDT bug wherein the SMBus object |
| 1101 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" |
| 1102 | * prefix. Work around this. |
| 1103 | */ |
| 1104 | static int acpi_ibm_smbus_match(struct acpi_device *device) |
| 1105 | { |
| 1106 | acpi_handle h_dummy; |
| 1107 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 1108 | int result; |
| 1109 | |
| 1110 | if (!dmi_name_in_vendors("IBM")) |
| 1111 | return -ENODEV; |
| 1112 | |
| 1113 | /* Look for SMBS object */ |
| 1114 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); |
| 1115 | if (result) |
| 1116 | return result; |
| 1117 | |
| 1118 | if (strcmp("SMBS", path.pointer)) { |
| 1119 | result = -ENODEV; |
| 1120 | goto out; |
| 1121 | } |
| 1122 | |
| 1123 | /* Does it have the necessary (but misnamed) methods? */ |
| 1124 | result = -ENODEV; |
| 1125 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && |
| 1126 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && |
| 1127 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) |
| 1128 | result = 0; |
| 1129 | out: |
| 1130 | kfree(path.pointer); |
| 1131 | return result; |
| 1132 | } |
| 1133 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1134 | static void acpi_device_set_id(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1136 | acpi_status status; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1137 | struct acpi_device_info *info; |
| 1138 | struct acpica_device_id_list *cid_list; |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1139 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1141 | switch (device->device_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | case ACPI_BUS_TYPE_DEVICE: |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1143 | if (ACPI_IS_ROOT_DEVICE(device)) { |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1144 | acpi_add_id(device, ACPI_SYSTEM_HID); |
Bjorn Helgaas | 859ac9a4 | 2009-09-21 19:29:50 +0000 | [diff] [blame] | 1145 | break; |
| 1146 | } |
| 1147 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1148 | status = acpi_get_object_info(device->handle, &info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | if (ACPI_FAILURE(status)) { |
Harvey Harrison | 96b2dd1 | 2008-03-05 18:24:51 -0800 | [diff] [blame] | 1150 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | return; |
| 1152 | } |
| 1153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | if (info->valid & ACPI_VALID_HID) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1155 | acpi_add_id(device, info->hardware_id.string); |
| 1156 | if (info->valid & ACPI_VALID_CID) { |
Bob Moore | 15b8dd5 | 2009-06-29 13:39:29 +0800 | [diff] [blame] | 1157 | cid_list = &info->compatible_id_list; |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1158 | for (i = 0; i < cid_list->count; i++) |
| 1159 | acpi_add_id(device, cid_list->ids[i].string); |
| 1160 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | if (info->valid & ACPI_VALID_ADR) { |
| 1162 | device->pnp.bus_address = info->address; |
| 1163 | device->flags.bus_address = 1; |
| 1164 | } |
Zhang Rui | ae84333 | 2006-12-07 20:57:10 +0800 | [diff] [blame] | 1165 | |
Bjorn Helgaas | a83893ae | 2009-10-02 11:03:12 -0400 | [diff] [blame] | 1166 | kfree(info); |
| 1167 | |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1168 | /* |
| 1169 | * Some devices don't reliably have _HIDs & _CIDs, so add |
| 1170 | * synthetic HIDs to make sure drivers can find them. |
| 1171 | */ |
Thomas Renninger | c3d6de6 | 2008-08-01 17:37:55 +0200 | [diff] [blame] | 1172 | if (acpi_is_video_device(device)) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1173 | acpi_add_id(device, ACPI_VIDEO_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1174 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1175 | acpi_add_id(device, ACPI_BAY_HID); |
Frank Seidel | 3620f2f | 2007-12-07 13:20:34 +0100 | [diff] [blame] | 1176 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1177 | acpi_add_id(device, ACPI_DOCK_HID); |
Darrick J. Wong | 222e82a | 2010-03-24 14:38:37 +0100 | [diff] [blame] | 1178 | else if (!acpi_ibm_smbus_match(device)) |
| 1179 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); |
Bjorn Helgaas | b7b30de | 2010-03-24 10:44:33 -0600 | [diff] [blame] | 1180 | else if (!acpi_device_hid(device) && |
| 1181 | ACPI_IS_ROOT_DEVICE(device->parent)) { |
| 1182 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ |
| 1183 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); |
| 1184 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); |
| 1185 | } |
Zhang Rui | 5473526 | 2007-01-11 02:09:09 -0500 | [diff] [blame] | 1186 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1187 | break; |
| 1188 | case ACPI_BUS_TYPE_POWER: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1189 | acpi_add_id(device, ACPI_POWER_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | break; |
| 1191 | case ACPI_BUS_TYPE_PROCESSOR: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1192 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | case ACPI_BUS_TYPE_THERMAL: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1195 | acpi_add_id(device, ACPI_THERMAL_HID); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | break; |
| 1197 | case ACPI_BUS_TYPE_POWER_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1198 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | break; |
| 1200 | case ACPI_BUS_TYPE_SLEEP_BUTTON: |
Bjorn Helgaas | 57f3674 | 2009-09-21 13:35:40 -0600 | [diff] [blame] | 1201 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | break; |
| 1203 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | } |
| 1205 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1206 | static int acpi_device_set_context(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | { |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1208 | acpi_status status; |
| 1209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | /* |
| 1211 | * Context |
| 1212 | * ------- |
| 1213 | * Attach this 'struct acpi_device' to the ACPI object. This makes |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1214 | * resolutions from handle->device very efficient. Fixed hardware |
| 1215 | * devices have no handles, so we skip them. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | */ |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1217 | if (!device->handle) |
| 1218 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1219 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1220 | status = acpi_attach_data(device->handle, |
| 1221 | acpi_bus_data_handler, device); |
| 1222 | if (ACPI_SUCCESS(status)) |
| 1223 | return 0; |
| 1224 | |
| 1225 | printk(KERN_ERR PREFIX "Error attaching device data\n"); |
| 1226 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1227 | } |
| 1228 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1229 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | if (!dev) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1232 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
Li Shaohua | 9633357 | 2006-12-07 20:56:46 +0800 | [diff] [blame] | 1234 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
Patrick Mochel | 1890a97 | 2006-12-07 20:56:31 +0800 | [diff] [blame] | 1235 | device_release_driver(&dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | |
| 1237 | if (!rmdevice) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1238 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 1240 | /* |
| 1241 | * unbind _ADR-Based Devices when hot removal |
| 1242 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | if (dev->flags.bus_address) { |
| 1244 | if ((dev->parent) && (dev->parent->ops.unbind)) |
| 1245 | dev->parent->ops.unbind(dev); |
| 1246 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
| 1248 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1249 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | } |
| 1251 | |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1252 | static int acpi_add_single_object(struct acpi_device **child, |
| 1253 | acpi_handle handle, int type, |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1254 | unsigned long long sta, |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1255 | struct acpi_bus_ops *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | { |
Bjorn Helgaas | 77c2488 | 2009-09-21 19:29:30 +0000 | [diff] [blame] | 1257 | int result; |
| 1258 | struct acpi_device *device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1259 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
Burman Yan | 36bcbec | 2006-12-19 12:56:11 -0800 | [diff] [blame] | 1261 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | if (!device) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 1263 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1264 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | |
Bjorn Helgaas | 7f47fa6 | 2009-09-21 13:35:19 -0600 | [diff] [blame] | 1267 | INIT_LIST_HEAD(&device->pnp.ids); |
Bjorn Helgaas | caaa6ef | 2009-09-21 19:29:10 +0000 | [diff] [blame] | 1268 | device->device_type = type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1269 | device->handle = handle; |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1270 | device->parent = acpi_bus_get_parent(handle); |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1271 | device->bus_ops = *ops; /* workround for not call .start */ |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1272 | STRUCT_TO_INT(device->status) = sta; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1273 | |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1274 | acpi_device_get_busid(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | |
| 1276 | /* |
| 1277 | * Flags |
| 1278 | * ----- |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1279 | * Note that we only look for object handles -- cannot evaluate objects |
| 1280 | * until we know the device is present and properly initialized. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | */ |
| 1282 | result = acpi_bus_get_flags(device); |
| 1283 | if (result) |
| 1284 | goto end; |
| 1285 | |
| 1286 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | * Initialize Device |
| 1288 | * ----------------- |
| 1289 | * TBD: Synch with Core's enumeration/initialization process. |
| 1290 | */ |
Bjorn Helgaas | c7bcb4e | 2009-09-21 19:29:25 +0000 | [diff] [blame] | 1291 | acpi_device_set_id(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | |
| 1293 | /* |
| 1294 | * Power Management |
| 1295 | * ---------------- |
| 1296 | */ |
| 1297 | if (device->flags.power_manageable) { |
| 1298 | result = acpi_bus_get_power_flags(device); |
| 1299 | if (result) |
| 1300 | goto end; |
| 1301 | } |
| 1302 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1303 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | * Wakeup device management |
| 1305 | *----------------------- |
| 1306 | */ |
Rafael J. Wysocki | d57d09a | 2011-01-06 23:41:27 +0100 | [diff] [blame] | 1307 | acpi_bus_get_wakeup_device_flags(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
| 1309 | /* |
| 1310 | * Performance Management |
| 1311 | * ---------------------- |
| 1312 | */ |
| 1313 | if (device->flags.performance_manageable) { |
| 1314 | result = acpi_bus_get_perf_flags(device); |
| 1315 | if (result) |
| 1316 | goto end; |
| 1317 | } |
| 1318 | |
Bjorn Helgaas | bc3b077 | 2009-09-21 19:29:20 +0000 | [diff] [blame] | 1319 | if ((result = acpi_device_set_context(device))) |
Len Brown | f61f925 | 2009-09-05 13:33:23 -0400 | [diff] [blame] | 1320 | goto end; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | |
Bjorn Helgaas | 66b7ed4 | 2009-09-21 19:29:05 +0000 | [diff] [blame] | 1322 | result = acpi_device_register(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
| 1324 | /* |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 1325 | * Bind _ADR-Based Devices when hot add |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | */ |
| 1327 | if (device->flags.bus_address) { |
| 1328 | if (device->parent && device->parent->ops.bind) |
| 1329 | device->parent->ops.bind(device); |
| 1330 | } |
| 1331 | |
Alex Chiang | 0c526d9 | 2009-05-14 08:31:37 -0600 | [diff] [blame] | 1332 | end: |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1333 | if (!result) { |
| 1334 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); |
| 1335 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 1336 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), |
| 1337 | (char *) buffer.pointer, |
| 1338 | device->parent ? dev_name(&device->parent->dev) : |
| 1339 | "(null)")); |
| 1340 | kfree(buffer.pointer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | *child = device; |
Bjorn Helgaas | 29aaefa | 2009-09-21 19:28:54 +0000 | [diff] [blame] | 1342 | } else |
Hugh Dickins | 718fb0d | 2009-08-06 23:18:12 +0000 | [diff] [blame] | 1343 | acpi_device_release(&device->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1345 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1348 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
| 1349 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) |
| 1350 | |
Rafael J. Wysocki | bf325f9 | 2010-11-25 00:10:44 +0100 | [diff] [blame] | 1351 | static void acpi_bus_add_power_resource(acpi_handle handle) |
| 1352 | { |
| 1353 | struct acpi_bus_ops ops = { |
| 1354 | .acpi_op_add = 1, |
| 1355 | .acpi_op_start = 1, |
| 1356 | }; |
| 1357 | struct acpi_device *device = NULL; |
| 1358 | |
| 1359 | acpi_bus_get_device(handle, &device); |
| 1360 | if (!device) |
| 1361 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, |
| 1362 | ACPI_STA_DEFAULT, &ops); |
| 1363 | } |
| 1364 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1365 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
| 1366 | unsigned long long *sta) |
| 1367 | { |
| 1368 | acpi_status status; |
| 1369 | acpi_object_type acpi_type; |
| 1370 | |
| 1371 | status = acpi_get_type(handle, &acpi_type); |
| 1372 | if (ACPI_FAILURE(status)) |
| 1373 | return -ENODEV; |
| 1374 | |
| 1375 | switch (acpi_type) { |
| 1376 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
| 1377 | case ACPI_TYPE_DEVICE: |
| 1378 | *type = ACPI_BUS_TYPE_DEVICE; |
| 1379 | status = acpi_bus_get_status_handle(handle, sta); |
| 1380 | if (ACPI_FAILURE(status)) |
| 1381 | return -ENODEV; |
| 1382 | break; |
| 1383 | case ACPI_TYPE_PROCESSOR: |
| 1384 | *type = ACPI_BUS_TYPE_PROCESSOR; |
| 1385 | status = acpi_bus_get_status_handle(handle, sta); |
| 1386 | if (ACPI_FAILURE(status)) |
| 1387 | return -ENODEV; |
| 1388 | break; |
| 1389 | case ACPI_TYPE_THERMAL: |
| 1390 | *type = ACPI_BUS_TYPE_THERMAL; |
| 1391 | *sta = ACPI_STA_DEFAULT; |
| 1392 | break; |
| 1393 | case ACPI_TYPE_POWER: |
| 1394 | *type = ACPI_BUS_TYPE_POWER; |
| 1395 | *sta = ACPI_STA_DEFAULT; |
| 1396 | break; |
| 1397 | default: |
| 1398 | return -ENODEV; |
| 1399 | } |
| 1400 | |
| 1401 | return 0; |
| 1402 | } |
| 1403 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1404 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, |
| 1405 | void *context, void **return_value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | { |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1407 | struct acpi_bus_ops *ops = context; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1408 | int type; |
| 1409 | unsigned long long sta; |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1410 | struct acpi_device *device; |
| 1411 | acpi_status status; |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1412 | int result; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1413 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1414 | result = acpi_bus_type_and_status(handle, &type, &sta); |
| 1415 | if (result) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1416 | return AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1418 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1419 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
Rafael J. Wysocki | 86e4e20 | 2011-01-06 23:40:00 +0100 | [diff] [blame] | 1420 | struct acpi_device_wakeup wakeup; |
| 1421 | acpi_handle temp; |
| 1422 | |
| 1423 | status = acpi_get_handle(handle, "_PRW", &temp); |
| 1424 | if (ACPI_SUCCESS(status)) |
| 1425 | acpi_bus_extract_wakeup_device_power_package(handle, |
| 1426 | &wakeup); |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1427 | return AE_CTRL_DEPTH; |
Rafael J. Wysocki | b581a7f | 2010-12-17 22:34:01 +0100 | [diff] [blame] | 1428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1430 | /* |
| 1431 | * We may already have an acpi_device from a previous enumeration. If |
| 1432 | * so, we needn't add it again, but we may still have to start it. |
| 1433 | */ |
| 1434 | device = NULL; |
| 1435 | acpi_bus_get_device(handle, &device); |
| 1436 | if (ops->acpi_op_add && !device) |
| 1437 | acpi_add_single_object(&device, handle, type, sta, ops); |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1438 | |
Bjorn Helgaas | e3b87f8 | 2009-09-21 19:30:11 +0000 | [diff] [blame] | 1439 | if (!device) |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1440 | return AE_CTRL_DEPTH; |
| 1441 | |
| 1442 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
| 1443 | status = acpi_start_single_object(device); |
| 1444 | if (ACPI_FAILURE(status)) |
| 1445 | return AE_CTRL_DEPTH; |
| 1446 | } |
| 1447 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1448 | if (!*return_value) |
| 1449 | *return_value = device; |
| 1450 | return AE_OK; |
| 1451 | } |
| 1452 | |
| 1453 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
| 1454 | struct acpi_device **child) |
| 1455 | { |
| 1456 | acpi_status status; |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1457 | void *device = NULL; |
| 1458 | |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1459 | status = acpi_bus_check_add(handle, 0, ops, &device); |
| 1460 | if (ACPI_SUCCESS(status)) |
| 1461 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, |
Lin Ming | 2263576 | 2009-11-13 10:06:08 +0800 | [diff] [blame] | 1462 | acpi_bus_check_add, NULL, ops, &device); |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1463 | |
| 1464 | if (child) |
| 1465 | *child = device; |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1466 | |
| 1467 | if (device) |
| 1468 | return 0; |
| 1469 | else |
| 1470 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1471 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1473 | /* |
| 1474 | * acpi_bus_add and acpi_bus_start |
| 1475 | * |
| 1476 | * scan a given ACPI tree and (probably recently hot-plugged) |
| 1477 | * create and add or starts found devices. |
| 1478 | * |
| 1479 | * If no devices were found -ENODEV is returned which does not |
| 1480 | * mean that this is a real error, there just have been no suitable |
| 1481 | * ACPI objects in the table trunk from which the kernel could create |
| 1482 | * a device and add/start an appropriate driver. |
| 1483 | */ |
| 1484 | |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1485 | int |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1486 | acpi_bus_add(struct acpi_device **child, |
| 1487 | struct acpi_device *parent, acpi_handle handle, int type) |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1488 | { |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1489 | struct acpi_bus_ops ops; |
| 1490 | |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1491 | memset(&ops, 0, sizeof(ops)); |
| 1492 | ops.acpi_op_add = 1; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1493 | |
Thomas Renninger | 7779688 | 2010-01-29 17:48:52 +0100 | [diff] [blame] | 1494 | return acpi_bus_scan(handle, &ops, child); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1495 | } |
| 1496 | EXPORT_SYMBOL(acpi_bus_add); |
| 1497 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1498 | int acpi_bus_start(struct acpi_device *device) |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1499 | { |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1500 | struct acpi_bus_ops ops; |
Rafael J. Wysocki | a210080 | 2010-09-16 00:30:43 +0200 | [diff] [blame] | 1501 | int result; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1502 | |
Thomas Renninger | d2f6650 | 2010-01-29 17:48:51 +0100 | [diff] [blame] | 1503 | if (!device) |
| 1504 | return -EINVAL; |
| 1505 | |
Bjorn Helgaas | 8e029bf | 2009-09-21 19:29:40 +0000 | [diff] [blame] | 1506 | memset(&ops, 0, sizeof(ops)); |
| 1507 | ops.acpi_op_start = 1; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1508 | |
Rafael J. Wysocki | a210080 | 2010-09-16 00:30:43 +0200 | [diff] [blame] | 1509 | result = acpi_bus_scan(device->handle, &ops, NULL); |
| 1510 | |
Lin Ming | 3a37898 | 2010-12-13 13:36:15 +0800 | [diff] [blame] | 1511 | acpi_update_all_gpes(); |
Rafael J. Wysocki | a210080 | 2010-09-16 00:30:43 +0200 | [diff] [blame] | 1512 | |
| 1513 | return result; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1514 | } |
| 1515 | EXPORT_SYMBOL(acpi_bus_start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | |
Kristen Accardi | ceaba66 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 1517 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1519 | acpi_status status; |
| 1520 | struct acpi_device *parent, *child; |
| 1521 | acpi_handle phandle, chandle; |
| 1522 | acpi_object_type type; |
| 1523 | u32 level = 1; |
| 1524 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1526 | parent = start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | phandle = start->handle; |
| 1528 | child = chandle = NULL; |
| 1529 | |
| 1530 | while ((level > 0) && parent && (!err)) { |
| 1531 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1532 | chandle, &chandle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | |
| 1534 | /* |
| 1535 | * If this scope is exhausted then move our way back up. |
| 1536 | */ |
| 1537 | if (ACPI_FAILURE(status)) { |
| 1538 | level--; |
| 1539 | chandle = phandle; |
| 1540 | acpi_get_parent(phandle, &phandle); |
| 1541 | child = parent; |
| 1542 | parent = parent->parent; |
| 1543 | |
| 1544 | if (level == 0) |
| 1545 | err = acpi_bus_remove(child, rmdevice); |
| 1546 | else |
| 1547 | err = acpi_bus_remove(child, 1); |
| 1548 | |
| 1549 | continue; |
| 1550 | } |
| 1551 | |
| 1552 | status = acpi_get_type(chandle, &type); |
| 1553 | if (ACPI_FAILURE(status)) { |
| 1554 | continue; |
| 1555 | } |
| 1556 | /* |
| 1557 | * If there is a device corresponding to chandle then |
| 1558 | * parse it (depth-first). |
| 1559 | */ |
| 1560 | if (acpi_bus_get_device(chandle, &child) == 0) { |
| 1561 | level++; |
| 1562 | phandle = chandle; |
| 1563 | chandle = NULL; |
| 1564 | parent = child; |
| 1565 | } |
| 1566 | continue; |
| 1567 | } |
| 1568 | return err; |
| 1569 | } |
Kristen Accardi | ceaba66 | 2006-02-23 17:56:01 -0800 | [diff] [blame] | 1570 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
| 1571 | |
Bjorn Helgaas | e8b945c | 2009-09-21 19:28:59 +0000 | [diff] [blame] | 1572 | static int acpi_bus_scan_fixed(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 1574 | int result = 0; |
| 1575 | struct acpi_device *device = NULL; |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1576 | struct acpi_bus_ops ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1578 | memset(&ops, 0, sizeof(ops)); |
| 1579 | ops.acpi_op_add = 1; |
| 1580 | ops.acpi_op_start = 1; |
| 1581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | /* |
| 1583 | * Enumerate all fixed-feature devices. |
| 1584 | */ |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 1585 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1586 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1587 | ACPI_BUS_TYPE_POWER_BUTTON, |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1588 | ACPI_STA_DEFAULT, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1589 | &ops); |
Daniel Drake | c10d7a1 | 2012-05-10 00:08:43 +0100 | [diff] [blame] | 1590 | device_init_wakeup(&device->dev, true); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1591 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
Alexey Starikovskiy | cee324b | 2007-02-02 19:48:22 +0300 | [diff] [blame] | 1593 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
Bjorn Helgaas | 5c478f4 | 2009-09-21 19:29:35 +0000 | [diff] [blame] | 1594 | result = acpi_add_single_object(&device, NULL, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1595 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
Bjorn Helgaas | 778cbc1 | 2009-09-21 19:30:06 +0000 | [diff] [blame] | 1596 | ACPI_STA_DEFAULT, |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1597 | &ops); |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1598 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1600 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | } |
| 1602 | |
Bjorn Helgaas | e747f27 | 2009-03-24 16:49:43 -0600 | [diff] [blame] | 1603 | int __init acpi_scan_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | { |
| 1605 | int result; |
Rajesh Shah | 3fb0273 | 2005-04-28 00:25:52 -0700 | [diff] [blame] | 1606 | struct acpi_bus_ops ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1608 | memset(&ops, 0, sizeof(ops)); |
| 1609 | ops.acpi_op_add = 1; |
| 1610 | ops.acpi_op_start = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
Patrick Mochel | 5b32726 | 2006-05-10 10:33:00 -0400 | [diff] [blame] | 1612 | result = bus_register(&acpi_bus_type); |
| 1613 | if (result) { |
| 1614 | /* We don't want to quit even if we failed to add suspend/resume */ |
| 1615 | printk(KERN_ERR PREFIX "Could not register bus type\n"); |
| 1616 | } |
| 1617 | |
Rafael J. Wysocki | 97d9a9e | 2010-11-25 00:10:02 +0100 | [diff] [blame] | 1618 | acpi_power_init(); |
| 1619 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | * Enumerate devices in the ACPI namespace. |
| 1622 | */ |
Bjorn Helgaas | 51a85fa | 2009-09-21 19:29:56 +0000 | [diff] [blame] | 1623 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
Alexey Starikovskiy | c04209a | 2008-01-01 14:12:55 -0500 | [diff] [blame] | 1624 | |
Li Shaohua | c4168bf | 2006-12-07 20:56:41 +0800 | [diff] [blame] | 1625 | if (!result) |
Bjorn Helgaas | adc08e2 | 2009-09-21 19:29:45 +0000 | [diff] [blame] | 1626 | result = acpi_bus_scan_fixed(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | |
| 1628 | if (result) |
| 1629 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); |
Rafael J. Wysocki | a210080 | 2010-09-16 00:30:43 +0200 | [diff] [blame] | 1630 | else |
Lin Ming | 3a37898 | 2010-12-13 13:36:15 +0800 | [diff] [blame] | 1631 | acpi_update_all_gpes(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 1633 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | } |