Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Greybus "Core" |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * Released under the GPLv2 only. |
| 7 | */ |
| 8 | |
| 9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/moduleparam.h> |
| 14 | #include <linux/kernel.h> |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 15 | #include <linux/slab.h> |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 16 | #include <linux/kthread.h> |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 17 | #include <linux/device.h> |
| 18 | |
| 19 | #include "greybus.h" |
| 20 | |
| 21 | /* Allow greybus to be disabled at boot if needed */ |
| 22 | static bool nogreybus; |
| 23 | #ifdef MODULE |
| 24 | module_param(nogreybus, bool, 0444); |
| 25 | #else |
| 26 | core_param(nogreybus, bool, 0444); |
| 27 | #endif |
| 28 | int greybus_disabled(void) |
| 29 | { |
| 30 | return nogreybus; |
| 31 | } |
| 32 | EXPORT_SYMBOL_GPL(greybus_disabled); |
| 33 | |
| 34 | static int greybus_match_one_id(struct greybus_device *gdev, |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 35 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 36 | { |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 37 | struct greybus_descriptor_module_id *module_id; |
| 38 | struct greybus_descriptor_serial_number *serial_num; |
| 39 | |
| 40 | module_id = &gdev->module_id; |
| 41 | serial_num = &gdev->serial_number; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 42 | |
| 43 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 44 | (id->vendor != le16_to_cpu(module_id->vendor))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 45 | return 0; |
| 46 | |
| 47 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 48 | (id->product != le16_to_cpu(module_id->product))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 49 | return 0; |
| 50 | |
| 51 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 52 | (id->serial_number != le64_to_cpu(serial_num->serial_number))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 53 | return 0; |
| 54 | |
| 55 | return 1; |
| 56 | } |
| 57 | |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 58 | static const struct greybus_module_id *greybus_match_id( |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 59 | struct greybus_device *gdev, |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 60 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 61 | { |
| 62 | if (id == NULL) |
| 63 | return NULL; |
| 64 | |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 65 | for (; id->vendor || id->product || id->serial_number || |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 66 | id->driver_info ; id++) { |
| 67 | if (greybus_match_one_id(gdev, id)) |
| 68 | return id; |
| 69 | } |
| 70 | |
| 71 | return NULL; |
| 72 | } |
| 73 | |
| 74 | static int greybus_device_match(struct device *dev, struct device_driver *drv) |
| 75 | { |
| 76 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 77 | struct greybus_device *gdev = to_greybus_device(dev); |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 78 | const struct greybus_module_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 79 | |
| 80 | id = greybus_match_id(gdev, driver->id_table); |
| 81 | if (id) |
| 82 | return 1; |
| 83 | /* FIXME - Dyanmic ids? */ |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static int greybus_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 88 | { |
| 89 | /* struct greybus_device *gdev = to_greybus_device(dev); */ |
| 90 | |
| 91 | /* FIXME - add some uevents here... */ |
| 92 | return 0; |
| 93 | } |
| 94 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 95 | static struct bus_type greybus_bus_type = { |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 96 | .name = "greybus", |
| 97 | .match = greybus_device_match, |
| 98 | .uevent = greybus_uevent, |
| 99 | }; |
| 100 | |
| 101 | static int greybus_probe(struct device *dev) |
| 102 | { |
| 103 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 104 | struct greybus_device *gdev = to_greybus_device(dev); |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 105 | const struct greybus_module_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 106 | int retval; |
| 107 | |
| 108 | /* match id */ |
| 109 | id = greybus_match_id(gdev, driver->id_table); |
| 110 | if (!id) |
| 111 | return -ENODEV; |
| 112 | |
| 113 | retval = driver->probe(gdev, id); |
| 114 | if (retval) |
| 115 | return retval; |
| 116 | |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static int greybus_remove(struct device *dev) |
| 121 | { |
| 122 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 123 | struct greybus_device *gdev = to_greybus_device(dev); |
| 124 | |
| 125 | driver->disconnect(gdev); |
| 126 | return 0; |
| 127 | } |
| 128 | |
| 129 | int greybus_register_driver(struct greybus_driver *driver, struct module *owner, |
| 130 | const char *mod_name) |
| 131 | { |
| 132 | int retval; |
| 133 | |
| 134 | if (greybus_disabled()) |
| 135 | return -ENODEV; |
| 136 | |
| 137 | driver->driver.name = driver->name; |
| 138 | driver->driver.probe = greybus_probe; |
| 139 | driver->driver.remove = greybus_remove; |
| 140 | driver->driver.owner = owner; |
| 141 | driver->driver.mod_name = mod_name; |
| 142 | |
| 143 | retval = driver_register(&driver->driver); |
| 144 | if (retval) |
| 145 | return retval; |
| 146 | |
| 147 | pr_info("registered new driver %s\n", driver->name); |
| 148 | return 0; |
| 149 | } |
| 150 | EXPORT_SYMBOL_GPL(greybus_register_driver); |
| 151 | |
| 152 | void greybus_deregister(struct greybus_driver *driver) |
| 153 | { |
| 154 | driver_unregister(&driver->driver); |
| 155 | } |
| 156 | EXPORT_SYMBOL_GPL(greybus_deregister); |
| 157 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 158 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 159 | static void greybus_module_release(struct device *dev) |
| 160 | { |
| 161 | struct greybus_device *gdev = to_greybus_device(dev); |
| 162 | int i; |
| 163 | |
| 164 | for (i = 0; i < gdev->num_strings; ++i) |
| 165 | kfree(gdev->string[i]); |
| 166 | for (i = 0; i < gdev->num_cports; ++i) |
| 167 | kfree(gdev->cport[i]); |
| 168 | kfree(gdev); |
| 169 | } |
| 170 | |
| 171 | |
Greg Kroah-Hartman | e24e725 | 2014-09-01 19:01:14 -0700 | [diff] [blame] | 172 | const u8 *greybus_string(struct greybus_device *gdev, int id) |
| 173 | { |
| 174 | int i; |
| 175 | struct gdev_string *string; |
| 176 | |
| 177 | if (!gdev) |
| 178 | return NULL; |
| 179 | |
| 180 | for (i = 0; i < gdev->num_strings; ++i) { |
| 181 | string = gdev->string[i]; |
| 182 | if (string->id == id) |
| 183 | return &string->string[0]; |
| 184 | } |
| 185 | return NULL; |
| 186 | } |
| 187 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 188 | static struct device_type greybus_module_type = { |
| 189 | .name = "greybus_module", |
| 190 | .release = greybus_module_release, |
| 191 | }; |
| 192 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 193 | static int gb_init_subdevs(struct greybus_device *gdev, |
| 194 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 195 | { |
| 196 | int retval; |
| 197 | |
| 198 | /* Allocate all of the different "sub device types" for this device */ |
| 199 | retval = gb_i2c_probe(gdev, id); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 200 | if (retval) |
| 201 | goto error_i2c; |
| 202 | |
| 203 | retval = gb_gpio_probe(gdev, id); |
| 204 | if (retval) |
| 205 | goto error_gpio; |
| 206 | |
| 207 | retval = gb_sdio_probe(gdev, id); |
| 208 | if (retval) |
| 209 | goto error_sdio; |
| 210 | |
| 211 | retval = gb_tty_probe(gdev, id); |
| 212 | if (retval) |
| 213 | goto error_tty; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 214 | return 0; |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 215 | |
| 216 | error_tty: |
| 217 | gb_sdio_disconnect(gdev); |
| 218 | |
| 219 | error_sdio: |
| 220 | gb_gpio_disconnect(gdev); |
| 221 | |
| 222 | error_gpio: |
| 223 | gb_i2c_disconnect(gdev); |
| 224 | |
| 225 | error_i2c: |
| 226 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 227 | } |
| 228 | |
Greg Kroah-Hartman | 3be03d4 | 2014-09-01 19:10:06 -0700 | [diff] [blame] | 229 | static const struct greybus_module_id fake_gb_id = { |
| 230 | GREYBUS_DEVICE(0x42, 0x42) |
| 231 | }; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 232 | |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 233 | static int create_function(struct greybus_device *gdev, |
| 234 | struct greybus_descriptor *desc, int desc_size) |
| 235 | { |
| 236 | int header_size = sizeof(struct greybus_descriptor_function); |
| 237 | |
| 238 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 239 | dev_err(gdev->dev.parent, "invalid function header size %d\n", |
| 240 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 241 | return -EINVAL; |
| 242 | } |
| 243 | memcpy(&gdev->function, &desc->function, header_size); |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static int create_module_id(struct greybus_device *gdev, |
| 248 | struct greybus_descriptor *desc, int desc_size) |
| 249 | { |
| 250 | int header_size = sizeof(struct greybus_descriptor_module_id); |
| 251 | |
| 252 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 253 | dev_err(gdev->dev.parent, "invalid module header size %d\n", |
| 254 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 255 | return -EINVAL; |
| 256 | } |
| 257 | memcpy(&gdev->module_id, &desc->module_id, header_size); |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static int create_serial_number(struct greybus_device *gdev, |
| 262 | struct greybus_descriptor *desc, int desc_size) |
| 263 | { |
| 264 | int header_size = sizeof(struct greybus_descriptor_serial_number); |
| 265 | |
| 266 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 267 | dev_err(gdev->dev.parent, "invalid serial number header size %d\n", |
| 268 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 269 | return -EINVAL; |
| 270 | } |
| 271 | memcpy(&gdev->serial_number, &desc->serial_number, header_size); |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | static int create_string(struct greybus_device *gdev, |
| 276 | struct greybus_descriptor *desc, int desc_size) |
| 277 | { |
| 278 | int string_size; |
| 279 | struct gdev_string *string; |
| 280 | int header_size = sizeof(struct greybus_descriptor_string); |
| 281 | |
| 282 | if ((gdev->num_strings + 1) >= MAX_STRINGS_PER_MODULE) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 283 | dev_err(gdev->dev.parent, |
| 284 | "too many strings for this module!\n"); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 285 | return -EINVAL; |
| 286 | } |
| 287 | |
| 288 | if (desc_size < header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 289 | dev_err(gdev->dev.parent, "invalid string header size %d\n", |
| 290 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 291 | return -EINVAL; |
| 292 | } |
| 293 | |
| 294 | string_size = le16_to_cpu(desc->string.length); |
| 295 | string = kzalloc(sizeof(*string) + string_size + 1, GFP_KERNEL); |
| 296 | if (!string) |
| 297 | return -ENOMEM; |
| 298 | |
| 299 | string->length = string_size; |
| 300 | string->id = desc->string.id; |
| 301 | memcpy(&string->string, &desc->string.string, string_size); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 302 | |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 303 | gdev->string[gdev->num_strings] = string; |
| 304 | gdev->num_strings++; |
| 305 | |
| 306 | return 0; |
| 307 | } |
| 308 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 309 | static int create_cport(struct greybus_device *gdev, |
| 310 | struct greybus_descriptor *desc, int desc_size) |
| 311 | { |
| 312 | struct gdev_cport *cport; |
| 313 | int header_size = sizeof(struct greybus_descriptor_cport); |
| 314 | |
| 315 | if ((gdev->num_cports + 1) >= MAX_CPORTS_PER_MODULE) { |
| 316 | dev_err(gdev->dev.parent, "too many cports for this module!\n"); |
| 317 | return -EINVAL; |
| 318 | } |
| 319 | |
| 320 | if (desc_size != header_size) { |
| 321 | dev_err(gdev->dev.parent, |
| 322 | "invalid serial number header size %d\n", desc_size); |
| 323 | return -EINVAL; |
| 324 | } |
| 325 | |
| 326 | cport = kzalloc(sizeof(*cport), GFP_KERNEL); |
| 327 | if (!cport) |
| 328 | return -ENOMEM; |
| 329 | |
| 330 | cport->number = le16_to_cpu(desc->cport.number); |
| 331 | cport->size = le16_to_cpu(desc->cport.size); |
| 332 | cport->speed = desc->cport.speed; |
| 333 | |
| 334 | gdev->cport[gdev->num_cports] = cport; |
| 335 | gdev->num_cports++; |
| 336 | |
| 337 | return 0; |
| 338 | } |
| 339 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 340 | /** |
| 341 | * greybus_new_device: |
| 342 | * |
| 343 | * Pass in a buffer that _should_ be a set of greybus descriptor fields and spit |
| 344 | * out a greybus device structure. |
| 345 | */ |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 346 | struct greybus_device *greybus_new_device(struct device *parent, |
| 347 | int module_number, u8 *data, int size) |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 348 | { |
| 349 | struct greybus_device *gdev; |
| 350 | struct greybus_descriptor_block_header *block; |
| 351 | struct greybus_descriptor *desc; |
| 352 | int retval; |
| 353 | int overall_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 354 | int desc_size; |
| 355 | u8 version_major; |
| 356 | u8 version_minor; |
| 357 | |
| 358 | /* we have to have at _least_ the block header */ |
| 359 | if (size <= sizeof(struct greybus_descriptor_block_header)) |
| 360 | return NULL; |
| 361 | |
| 362 | gdev = kzalloc(sizeof(*gdev), GFP_KERNEL); |
| 363 | if (!gdev) |
| 364 | return NULL; |
| 365 | |
| 366 | gdev->module_number = module_number; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 367 | gdev->dev.parent = parent; |
| 368 | gdev->dev.driver = NULL; |
| 369 | gdev->dev.bus = &greybus_bus_type; |
| 370 | gdev->dev.type = &greybus_module_type; |
| 371 | gdev->dev.groups = greybus_module_groups; |
| 372 | gdev->dev.dma_mask = parent->dma_mask; |
| 373 | device_initialize(&gdev->dev); |
| 374 | dev_set_name(&gdev->dev, "%d", module_number); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 375 | |
| 376 | block = (struct greybus_descriptor_block_header *)data; |
| 377 | overall_size = le16_to_cpu(block->size); |
| 378 | if (overall_size != size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 379 | dev_err(parent, "size != block header size, %d != %d\n", size, |
| 380 | overall_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 381 | goto error; |
| 382 | } |
| 383 | |
| 384 | version_major = block->version_major; |
| 385 | version_minor = block->version_minor; |
| 386 | |
| 387 | // FIXME - check version major/minor here! |
| 388 | |
| 389 | size -= sizeof(struct greybus_descriptor_block_header); |
| 390 | data += sizeof(struct greybus_descriptor_block_header); |
| 391 | while (size > 0) { |
| 392 | desc = (struct greybus_descriptor *)data; |
| 393 | desc_size = le16_to_cpu(desc->header.size); |
| 394 | |
| 395 | switch (desc->header.type) { |
| 396 | case GREYBUS_TYPE_FUNCTION: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 397 | retval = create_function(gdev, desc, desc_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 398 | break; |
| 399 | |
| 400 | case GREYBUS_TYPE_MODULE_ID: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 401 | retval = create_module_id(gdev, desc, desc_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 402 | break; |
| 403 | |
| 404 | case GREYBUS_TYPE_SERIAL_NUMBER: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 405 | retval = create_serial_number(gdev, desc, desc_size); |
| 406 | break; |
| 407 | |
| 408 | case GREYBUS_TYPE_STRING: |
| 409 | retval = create_string(gdev, desc, desc_size); |
| 410 | break; |
| 411 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 412 | case GREYBUS_TYPE_CPORT: |
| 413 | retval = create_cport(gdev, desc, desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 414 | break; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 415 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 416 | case GREYBUS_TYPE_INVALID: |
| 417 | default: |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 418 | dev_err(parent, "invalid descriptor type %d\n", |
| 419 | desc->header.type); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 420 | goto error; |
| 421 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 422 | if (retval) |
| 423 | goto error; |
| 424 | size -= desc_size; |
| 425 | data += desc_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 426 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 427 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 428 | retval = gb_init_subdevs(gdev, &fake_gb_id); |
| 429 | if (retval) |
| 430 | goto error; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 431 | |
| 432 | // FIXME device_add(&gdev->dev); |
| 433 | |
| 434 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 435 | return gdev; |
| 436 | error: |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 437 | greybus_module_release(&gdev->dev); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 438 | return NULL; |
| 439 | } |
| 440 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 441 | void greybus_remove_device(struct greybus_device *gdev) |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 442 | { |
| 443 | /* tear down all of the "sub device types" for this device */ |
| 444 | gb_i2c_disconnect(gdev); |
| 445 | gb_gpio_disconnect(gdev); |
| 446 | gb_sdio_disconnect(gdev); |
| 447 | gb_tty_disconnect(gdev); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 448 | |
| 449 | // FIXME - device_remove(&gdev->dev); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 450 | } |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 451 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame^] | 452 | struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver, |
| 453 | struct device *parent) |
| 454 | { |
| 455 | struct greybus_host_device *hd; |
| 456 | |
| 457 | hd = kzalloc(sizeof(*hd) + driver->hd_priv_size, GFP_KERNEL); |
| 458 | if (!hd) |
| 459 | return NULL; |
| 460 | |
| 461 | kref_init(&hd->kref); |
| 462 | |
| 463 | return hd; |
| 464 | } |
| 465 | EXPORT_SYMBOL_GPL(greybus_create_hd); |
| 466 | |
| 467 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 468 | static int __init gb_init(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 469 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 470 | int retval; |
| 471 | |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 472 | retval = gb_debugfs_init(); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 473 | if (retval) |
| 474 | return retval; |
| 475 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 476 | retval = bus_register(&greybus_bus_type); |
| 477 | if (retval) |
| 478 | goto error_bus; |
| 479 | |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 480 | retval = gb_thread_init(); |
| 481 | if (retval) |
| 482 | goto error_thread; |
| 483 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 484 | // FIXME - more gb core init goes here |
| 485 | |
| 486 | retval = gb_tty_init(); |
| 487 | if (retval) |
| 488 | goto error_tty; |
| 489 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 490 | return 0; |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 491 | |
| 492 | error_tty: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 493 | gb_thread_destroy(); |
| 494 | |
| 495 | error_thread: |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 496 | bus_unregister(&greybus_bus_type); |
| 497 | |
| 498 | error_bus: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 499 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 500 | |
| 501 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 502 | } |
| 503 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 504 | static void __exit gb_exit(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 505 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 506 | gb_tty_exit(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 507 | bus_unregister(&greybus_bus_type); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 508 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 509 | } |
| 510 | |
| 511 | module_init(gb_init); |
| 512 | module_exit(gb_exit); |
| 513 | |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 514 | MODULE_LICENSE("GPL"); |
| 515 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |