1 /* 2 * Copyright 2013, Jérôme Duval, korli@users.berlios.de. 3 * 4 * Distributed under the terms of the MIT License. 5 */ 6 7 8 #include <ACPI.h> 9 10 #include <stdio.h> 11 #include <stdlib.h> 12 #include <string.h> 13 14 15 #define ACPI_AC_MODULE_NAME "drivers/power/acpi_ac/driver_v1" 16 17 #define ACPI_AC_DEVICE_MODULE_NAME "drivers/power/acpi_ac/device_v1" 18 19 /* Base Namespace devices are published to */ 20 #define ACPI_AC_BASENAME "power/acpi_ac/%d" 21 22 // name of pnp generator of path ids 23 #define ACPI_AC_PATHID_GENERATOR "acpi_ac/path_id" 24 25 #define TRACE_AC 26 #ifdef TRACE_AC 27 # define TRACE(x...) dprintf("acpi_ac: " x) 28 #else 29 # define TRACE(x...) 30 #endif 31 #define ERROR(x...) dprintf("acpi_ac: " x) 32 33 static device_manager_info *sDeviceManager; 34 35 36 typedef struct acpi_ns_device_info { 37 device_node *node; 38 acpi_device_module_info *acpi; 39 acpi_device acpi_cookie; 40 uint8 last_status; 41 } acpi_ac_device_info; 42 43 44 static void 45 acpi_ac_update_status(acpi_ac_device_info* device) 46 { 47 acpi_data buf; 48 buf.pointer = NULL; 49 buf.length = ACPI_ALLOCATE_BUFFER; 50 51 if (device->acpi->evaluate_method(device->acpi_cookie, "_PSR", NULL, &buf) != B_OK 52 || buf.pointer == NULL 53 || ((acpi_object_type*)buf.pointer)->object_type != ACPI_TYPE_INTEGER) { 54 ERROR("couldn't get status\n"); 55 } else { 56 acpi_object_type* object = (acpi_object_type*)buf.pointer; 57 device->last_status = object->integer.integer; 58 TRACE("status %d\n", device->last_status); 59 } 60 free(buf.pointer); 61 } 62 63 64 static void 65 acpi_ac_notify_handler(acpi_handle device, uint32 value, void *context) 66 { 67 if (value != 0x80) { 68 dprintf("acpi_ac: unknown notification (%d)\n", value); 69 return; 70 } 71 72 acpi_ac_device_info* dev = (acpi_ac_device_info*) context; 73 acpi_ac_update_status(dev); 74 } 75 76 77 // #pragma mark - device module API 78 79 80 static status_t 81 acpi_ac_init_device(void *driverCookie, void **cookie) 82 { 83 *cookie = driverCookie; 84 return B_OK; 85 } 86 87 88 static void 89 acpi_ac_uninit_device(void *_cookie) 90 { 91 92 } 93 94 95 static status_t 96 acpi_ac_open(void *_cookie, const char *path, int flags, void** cookie) 97 { 98 acpi_ac_device_info *device = (acpi_ac_device_info *)_cookie; 99 *cookie = device; 100 return B_OK; 101 } 102 103 104 static status_t 105 acpi_ac_read(void* _cookie, off_t position, void *buf, size_t* num_bytes) 106 { 107 acpi_ac_device_info* device = (acpi_ac_device_info*)_cookie; 108 if (*num_bytes < 1) 109 return B_IO_ERROR; 110 111 *((uint8 *)(buf)) = device->last_status; 112 113 *num_bytes = 1; 114 return B_OK; 115 } 116 117 118 static status_t 119 acpi_ac_write(void* cookie, off_t position, const void* buffer, size_t* num_bytes) 120 { 121 return B_ERROR; 122 } 123 124 125 static status_t 126 acpi_ac_control(void* _cookie, uint32 op, void* arg, size_t len) 127 { 128 return B_ERROR; 129 } 130 131 132 static status_t 133 acpi_ac_close (void* cookie) 134 { 135 return B_OK; 136 } 137 138 139 static status_t 140 acpi_ac_free (void* cookie) 141 { 142 return B_OK; 143 } 144 145 146 // #pragma mark - driver module API 147 148 149 static float 150 acpi_ac_support(device_node *parent) 151 { 152 const char *bus; 153 uint32 device_type; 154 const char *hid; 155 156 // make sure parent is really the ACPI bus manager 157 if (sDeviceManager->get_attr_string(parent, B_DEVICE_BUS, &bus, false)) 158 return -1; 159 160 if (strcmp(bus, "acpi")) 161 return 0.0; 162 163 // check whether it's really a device 164 if (sDeviceManager->get_attr_uint32(parent, ACPI_DEVICE_TYPE_ITEM, 165 &device_type, false) != B_OK 166 || device_type != ACPI_TYPE_DEVICE) { 167 return 0.0; 168 } 169 170 // check whether it's an ac device 171 if (sDeviceManager->get_attr_string(parent, ACPI_DEVICE_HID_ITEM, &hid, 172 false) != B_OK || strcmp(hid, "ACPI0003")) { 173 return 0.0; 174 } 175 176 dprintf("acpi_ac_support ac device found\n"); 177 178 return 0.6; 179 } 180 181 182 static status_t 183 acpi_ac_register_device(device_node *node) 184 { 185 device_attr attrs[] = { 186 { B_DEVICE_PRETTY_NAME, B_STRING_TYPE, { .string = "ACPI AC" }}, 187 { NULL } 188 }; 189 190 return sDeviceManager->register_node(node, ACPI_AC_MODULE_NAME, attrs, 191 NULL, NULL); 192 } 193 194 195 static status_t 196 acpi_ac_init_driver(device_node *node, void **_driverCookie) 197 { 198 acpi_ac_device_info *device; 199 device_node *parent; 200 status_t status; 201 202 device = (acpi_ac_device_info *)calloc(1, sizeof(*device)); 203 if (device == NULL) 204 return B_NO_MEMORY; 205 206 device->node = node; 207 208 parent = sDeviceManager->get_parent_node(node); 209 sDeviceManager->get_driver(parent, (driver_module_info **)&device->acpi, 210 (void **)&device->acpi_cookie); 211 sDeviceManager->put_node(parent); 212 213 status = device->acpi->install_notify_handler(device->acpi_cookie, 214 ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler, device); 215 if (status != B_OK) { 216 ERROR("can't install notify handler\n"); 217 } 218 219 device->last_status = 0; 220 221 acpi_ac_update_status(device); 222 223 *_driverCookie = device; 224 return B_OK; 225 } 226 227 228 static void 229 acpi_ac_uninit_driver(void *driverCookie) 230 { 231 acpi_ac_device_info *device = (acpi_ac_device_info *)driverCookie; 232 233 device->acpi->remove_notify_handler(device->acpi_cookie, 234 ACPI_DEVICE_NOTIFY, acpi_ac_notify_handler); 235 236 free(device); 237 } 238 239 240 static status_t 241 acpi_ac_register_child_devices(void *driverCookie) 242 { 243 acpi_ac_device_info *device = (acpi_ac_device_info *)driverCookie; 244 int path_id; 245 char name[128]; 246 247 path_id = sDeviceManager->create_id(ACPI_AC_PATHID_GENERATOR); 248 if (path_id < 0) { 249 ERROR("register_child_devices: couldn't create a path_id\n"); 250 return B_ERROR; 251 } 252 253 snprintf(name, sizeof(name), ACPI_AC_BASENAME, path_id); 254 255 return sDeviceManager->publish_device(device->node, name, 256 ACPI_AC_DEVICE_MODULE_NAME); 257 } 258 259 260 module_dependency module_dependencies[] = { 261 { B_DEVICE_MANAGER_MODULE_NAME, (module_info **)&sDeviceManager }, 262 {} 263 }; 264 265 266 driver_module_info acpi_ac_driver_module = { 267 { 268 ACPI_AC_MODULE_NAME, 269 0, 270 NULL 271 }, 272 273 acpi_ac_support, 274 acpi_ac_register_device, 275 acpi_ac_init_driver, 276 acpi_ac_uninit_driver, 277 acpi_ac_register_child_devices, 278 NULL, // rescan 279 NULL, // removed 280 }; 281 282 283 struct device_module_info acpi_ac_device_module = { 284 { 285 ACPI_AC_DEVICE_MODULE_NAME, 286 0, 287 NULL 288 }, 289 290 acpi_ac_init_device, 291 acpi_ac_uninit_device, 292 NULL, 293 294 acpi_ac_open, 295 acpi_ac_close, 296 acpi_ac_free, 297 acpi_ac_read, 298 acpi_ac_write, 299 NULL, 300 acpi_ac_control, 301 302 NULL, 303 NULL 304 }; 305 306 module_info *modules[] = { 307 (module_info *)&acpi_ac_driver_module, 308 (module_info *)&acpi_ac_device_module, 309 NULL 310 }; 311