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 | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 16 | #include <linux/device.h> |
| 17 | |
| 18 | #include "greybus.h" |
| 19 | |
| 20 | /* Allow greybus to be disabled at boot if needed */ |
| 21 | static bool nogreybus; |
| 22 | #ifdef MODULE |
| 23 | module_param(nogreybus, bool, 0444); |
| 24 | #else |
| 25 | core_param(nogreybus, bool, 0444); |
| 26 | #endif |
| 27 | int greybus_disabled(void) |
| 28 | { |
| 29 | return nogreybus; |
| 30 | } |
| 31 | EXPORT_SYMBOL_GPL(greybus_disabled); |
| 32 | |
| 33 | static int greybus_match_one_id(struct greybus_device *gdev, |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 34 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 35 | { |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 36 | struct greybus_descriptor_module_id *module_id; |
| 37 | struct greybus_descriptor_serial_number *serial_num; |
| 38 | |
| 39 | module_id = &gdev->module_id; |
| 40 | serial_num = &gdev->serial_number; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 41 | |
| 42 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_VENDOR) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 43 | (id->vendor != le16_to_cpu(module_id->vendor))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 44 | return 0; |
| 45 | |
| 46 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_PRODUCT) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 47 | (id->product != le16_to_cpu(module_id->product))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 48 | return 0; |
| 49 | |
| 50 | if ((id->match_flags & GREYBUS_DEVICE_ID_MATCH_SERIAL) && |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 51 | (id->serial_number != le64_to_cpu(serial_num->serial_number))) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 52 | return 0; |
| 53 | |
| 54 | return 1; |
| 55 | } |
| 56 | |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 57 | static const struct greybus_module_id *greybus_match_id( |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 58 | struct greybus_device *gdev, |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 59 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 60 | { |
| 61 | if (id == NULL) |
| 62 | return NULL; |
| 63 | |
Greg Kroah-Hartman | 6dca7b9 | 2014-09-01 13:42:43 -0700 | [diff] [blame] | 64 | for (; id->vendor || id->product || id->serial_number || |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 65 | id->driver_info ; id++) { |
| 66 | if (greybus_match_one_id(gdev, id)) |
| 67 | return id; |
| 68 | } |
| 69 | |
| 70 | return NULL; |
| 71 | } |
| 72 | |
| 73 | static int greybus_device_match(struct device *dev, struct device_driver *drv) |
| 74 | { |
| 75 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 76 | struct greybus_device *gdev = to_greybus_device(dev); |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 77 | const struct greybus_module_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 78 | |
| 79 | id = greybus_match_id(gdev, driver->id_table); |
| 80 | if (id) |
| 81 | return 1; |
| 82 | /* FIXME - Dyanmic ids? */ |
| 83 | return 0; |
| 84 | } |
| 85 | |
| 86 | static int greybus_uevent(struct device *dev, struct kobj_uevent_env *env) |
| 87 | { |
| 88 | /* struct greybus_device *gdev = to_greybus_device(dev); */ |
| 89 | |
| 90 | /* FIXME - add some uevents here... */ |
| 91 | return 0; |
| 92 | } |
| 93 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 94 | static struct bus_type greybus_bus_type = { |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 95 | .name = "greybus", |
| 96 | .match = greybus_device_match, |
| 97 | .uevent = greybus_uevent, |
| 98 | }; |
| 99 | |
| 100 | static int greybus_probe(struct device *dev) |
| 101 | { |
| 102 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 103 | struct greybus_device *gdev = to_greybus_device(dev); |
Greg Kroah-Hartman | 6584c8a | 2014-09-01 13:31:31 -0700 | [diff] [blame] | 104 | const struct greybus_module_id *id; |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 105 | int retval; |
| 106 | |
| 107 | /* match id */ |
| 108 | id = greybus_match_id(gdev, driver->id_table); |
| 109 | if (!id) |
| 110 | return -ENODEV; |
| 111 | |
| 112 | retval = driver->probe(gdev, id); |
| 113 | if (retval) |
| 114 | return retval; |
| 115 | |
| 116 | return 0; |
| 117 | } |
| 118 | |
| 119 | static int greybus_remove(struct device *dev) |
| 120 | { |
| 121 | struct greybus_driver *driver = to_greybus_driver(dev->driver); |
| 122 | struct greybus_device *gdev = to_greybus_device(dev); |
| 123 | |
| 124 | driver->disconnect(gdev); |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | int greybus_register_driver(struct greybus_driver *driver, struct module *owner, |
| 129 | const char *mod_name) |
| 130 | { |
| 131 | int retval; |
| 132 | |
| 133 | if (greybus_disabled()) |
| 134 | return -ENODEV; |
| 135 | |
| 136 | driver->driver.name = driver->name; |
| 137 | driver->driver.probe = greybus_probe; |
| 138 | driver->driver.remove = greybus_remove; |
| 139 | driver->driver.owner = owner; |
| 140 | driver->driver.mod_name = mod_name; |
| 141 | |
| 142 | retval = driver_register(&driver->driver); |
| 143 | if (retval) |
| 144 | return retval; |
| 145 | |
| 146 | pr_info("registered new driver %s\n", driver->name); |
| 147 | return 0; |
| 148 | } |
| 149 | EXPORT_SYMBOL_GPL(greybus_register_driver); |
| 150 | |
| 151 | void greybus_deregister(struct greybus_driver *driver) |
| 152 | { |
| 153 | driver_unregister(&driver->driver); |
| 154 | } |
| 155 | EXPORT_SYMBOL_GPL(greybus_deregister); |
| 156 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 157 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 158 | static void greybus_module_release(struct device *dev) |
| 159 | { |
| 160 | struct greybus_device *gdev = to_greybus_device(dev); |
| 161 | int i; |
| 162 | |
| 163 | for (i = 0; i < gdev->num_strings; ++i) |
| 164 | kfree(gdev->string[i]); |
| 165 | for (i = 0; i < gdev->num_cports; ++i) |
| 166 | kfree(gdev->cport[i]); |
| 167 | kfree(gdev); |
| 168 | } |
| 169 | |
| 170 | |
Greg Kroah-Hartman | e24e725 | 2014-09-01 19:01:14 -0700 | [diff] [blame] | 171 | const u8 *greybus_string(struct greybus_device *gdev, int id) |
| 172 | { |
| 173 | int i; |
| 174 | struct gdev_string *string; |
| 175 | |
| 176 | if (!gdev) |
| 177 | return NULL; |
| 178 | |
| 179 | for (i = 0; i < gdev->num_strings; ++i) { |
| 180 | string = gdev->string[i]; |
| 181 | if (string->id == id) |
| 182 | return &string->string[0]; |
| 183 | } |
| 184 | return NULL; |
| 185 | } |
| 186 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 187 | static struct device_type greybus_module_type = { |
| 188 | .name = "greybus_module", |
| 189 | .release = greybus_module_release, |
| 190 | }; |
| 191 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 192 | static int gb_init_subdevs(struct greybus_device *gdev, |
| 193 | const struct greybus_module_id *id) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 194 | { |
| 195 | int retval; |
| 196 | |
| 197 | /* Allocate all of the different "sub device types" for this device */ |
| 198 | retval = gb_i2c_probe(gdev, id); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 199 | if (retval) |
| 200 | goto error_i2c; |
| 201 | |
| 202 | retval = gb_gpio_probe(gdev, id); |
| 203 | if (retval) |
| 204 | goto error_gpio; |
| 205 | |
| 206 | retval = gb_sdio_probe(gdev, id); |
| 207 | if (retval) |
| 208 | goto error_sdio; |
| 209 | |
| 210 | retval = gb_tty_probe(gdev, id); |
| 211 | if (retval) |
| 212 | goto error_tty; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 213 | return 0; |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 214 | |
| 215 | error_tty: |
| 216 | gb_sdio_disconnect(gdev); |
| 217 | |
| 218 | error_sdio: |
| 219 | gb_gpio_disconnect(gdev); |
| 220 | |
| 221 | error_gpio: |
| 222 | gb_i2c_disconnect(gdev); |
| 223 | |
| 224 | error_i2c: |
| 225 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 226 | } |
| 227 | |
Greg Kroah-Hartman | 3be03d4 | 2014-09-01 19:10:06 -0700 | [diff] [blame] | 228 | static const struct greybus_module_id fake_gb_id = { |
| 229 | GREYBUS_DEVICE(0x42, 0x42) |
| 230 | }; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 231 | |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 232 | static int create_function(struct greybus_device *gdev, |
| 233 | struct greybus_descriptor *desc, int desc_size) |
| 234 | { |
| 235 | int header_size = sizeof(struct greybus_descriptor_function); |
| 236 | |
| 237 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 238 | dev_err(gdev->dev.parent, "invalid function header size %d\n", |
| 239 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 240 | return -EINVAL; |
| 241 | } |
| 242 | memcpy(&gdev->function, &desc->function, header_size); |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static int create_module_id(struct greybus_device *gdev, |
| 247 | struct greybus_descriptor *desc, int desc_size) |
| 248 | { |
| 249 | int header_size = sizeof(struct greybus_descriptor_module_id); |
| 250 | |
| 251 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 252 | dev_err(gdev->dev.parent, "invalid module header size %d\n", |
| 253 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 254 | return -EINVAL; |
| 255 | } |
| 256 | memcpy(&gdev->module_id, &desc->module_id, header_size); |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static int create_serial_number(struct greybus_device *gdev, |
| 261 | struct greybus_descriptor *desc, int desc_size) |
| 262 | { |
| 263 | int header_size = sizeof(struct greybus_descriptor_serial_number); |
| 264 | |
| 265 | if (desc_size != header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 266 | dev_err(gdev->dev.parent, "invalid serial number header size %d\n", |
| 267 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 268 | return -EINVAL; |
| 269 | } |
| 270 | memcpy(&gdev->serial_number, &desc->serial_number, header_size); |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | static int create_string(struct greybus_device *gdev, |
| 275 | struct greybus_descriptor *desc, int desc_size) |
| 276 | { |
| 277 | int string_size; |
| 278 | struct gdev_string *string; |
| 279 | int header_size = sizeof(struct greybus_descriptor_string); |
| 280 | |
| 281 | if ((gdev->num_strings + 1) >= MAX_STRINGS_PER_MODULE) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 282 | dev_err(gdev->dev.parent, |
| 283 | "too many strings for this module!\n"); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 284 | return -EINVAL; |
| 285 | } |
| 286 | |
| 287 | if (desc_size < header_size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 288 | dev_err(gdev->dev.parent, "invalid string header size %d\n", |
| 289 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 290 | return -EINVAL; |
| 291 | } |
| 292 | |
| 293 | string_size = le16_to_cpu(desc->string.length); |
| 294 | string = kzalloc(sizeof(*string) + string_size + 1, GFP_KERNEL); |
| 295 | if (!string) |
| 296 | return -ENOMEM; |
| 297 | |
| 298 | string->length = string_size; |
| 299 | string->id = desc->string.id; |
| 300 | memcpy(&string->string, &desc->string.string, string_size); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 301 | |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 302 | gdev->string[gdev->num_strings] = string; |
| 303 | gdev->num_strings++; |
| 304 | |
| 305 | return 0; |
| 306 | } |
| 307 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 308 | static int create_cport(struct greybus_device *gdev, |
| 309 | struct greybus_descriptor *desc, int desc_size) |
| 310 | { |
| 311 | struct gdev_cport *cport; |
| 312 | int header_size = sizeof(struct greybus_descriptor_cport); |
| 313 | |
| 314 | if ((gdev->num_cports + 1) >= MAX_CPORTS_PER_MODULE) { |
| 315 | dev_err(gdev->dev.parent, "too many cports for this module!\n"); |
| 316 | return -EINVAL; |
| 317 | } |
| 318 | |
| 319 | if (desc_size != header_size) { |
| 320 | dev_err(gdev->dev.parent, |
| 321 | "invalid serial number header size %d\n", desc_size); |
| 322 | return -EINVAL; |
| 323 | } |
| 324 | |
| 325 | cport = kzalloc(sizeof(*cport), GFP_KERNEL); |
| 326 | if (!cport) |
| 327 | return -ENOMEM; |
| 328 | |
| 329 | cport->number = le16_to_cpu(desc->cport.number); |
| 330 | cport->size = le16_to_cpu(desc->cport.size); |
| 331 | cport->speed = desc->cport.speed; |
| 332 | |
| 333 | gdev->cport[gdev->num_cports] = cport; |
| 334 | gdev->num_cports++; |
| 335 | |
| 336 | return 0; |
| 337 | } |
| 338 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 339 | /** |
| 340 | * greybus_new_device: |
| 341 | * |
| 342 | * Pass in a buffer that _should_ be a set of greybus descriptor fields and spit |
| 343 | * out a greybus device structure. |
| 344 | */ |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 345 | struct greybus_device *greybus_new_device(struct device *parent, |
| 346 | int module_number, u8 *data, int size) |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 347 | { |
| 348 | struct greybus_device *gdev; |
| 349 | struct greybus_descriptor_block_header *block; |
| 350 | struct greybus_descriptor *desc; |
| 351 | int retval; |
| 352 | int overall_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 353 | int desc_size; |
| 354 | u8 version_major; |
| 355 | u8 version_minor; |
| 356 | |
| 357 | /* we have to have at _least_ the block header */ |
| 358 | if (size <= sizeof(struct greybus_descriptor_block_header)) |
| 359 | return NULL; |
| 360 | |
| 361 | gdev = kzalloc(sizeof(*gdev), GFP_KERNEL); |
| 362 | if (!gdev) |
| 363 | return NULL; |
| 364 | |
| 365 | gdev->module_number = module_number; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 366 | gdev->dev.parent = parent; |
| 367 | gdev->dev.driver = NULL; |
| 368 | gdev->dev.bus = &greybus_bus_type; |
| 369 | gdev->dev.type = &greybus_module_type; |
| 370 | gdev->dev.groups = greybus_module_groups; |
| 371 | gdev->dev.dma_mask = parent->dma_mask; |
| 372 | device_initialize(&gdev->dev); |
| 373 | dev_set_name(&gdev->dev, "%d", module_number); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 374 | |
| 375 | block = (struct greybus_descriptor_block_header *)data; |
| 376 | overall_size = le16_to_cpu(block->size); |
| 377 | if (overall_size != size) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 378 | dev_err(parent, "size != block header size, %d != %d\n", size, |
| 379 | overall_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 380 | goto error; |
| 381 | } |
| 382 | |
| 383 | version_major = block->version_major; |
| 384 | version_minor = block->version_minor; |
| 385 | |
| 386 | // FIXME - check version major/minor here! |
| 387 | |
| 388 | size -= sizeof(struct greybus_descriptor_block_header); |
| 389 | data += sizeof(struct greybus_descriptor_block_header); |
| 390 | while (size > 0) { |
| 391 | desc = (struct greybus_descriptor *)data; |
| 392 | desc_size = le16_to_cpu(desc->header.size); |
| 393 | |
| 394 | switch (desc->header.type) { |
| 395 | case GREYBUS_TYPE_FUNCTION: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 396 | retval = create_function(gdev, desc, desc_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 397 | break; |
| 398 | |
| 399 | case GREYBUS_TYPE_MODULE_ID: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 400 | retval = create_module_id(gdev, desc, desc_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 401 | break; |
| 402 | |
| 403 | case GREYBUS_TYPE_SERIAL_NUMBER: |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 404 | retval = create_serial_number(gdev, desc, desc_size); |
| 405 | break; |
| 406 | |
| 407 | case GREYBUS_TYPE_STRING: |
| 408 | retval = create_string(gdev, desc, desc_size); |
| 409 | break; |
| 410 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 411 | case GREYBUS_TYPE_CPORT: |
| 412 | retval = create_cport(gdev, desc, desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 413 | break; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 414 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 415 | case GREYBUS_TYPE_INVALID: |
| 416 | default: |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 417 | dev_err(parent, "invalid descriptor type %d\n", |
| 418 | desc->header.type); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 419 | goto error; |
| 420 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 421 | if (retval) |
| 422 | goto error; |
| 423 | size -= desc_size; |
| 424 | data += desc_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 425 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 426 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 427 | retval = gb_init_subdevs(gdev, &fake_gb_id); |
| 428 | if (retval) |
| 429 | goto error; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 430 | |
| 431 | // FIXME device_add(&gdev->dev); |
| 432 | |
| 433 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 434 | return gdev; |
| 435 | error: |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 436 | greybus_module_release(&gdev->dev); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 437 | return NULL; |
| 438 | } |
| 439 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 440 | void greybus_remove_device(struct greybus_device *gdev) |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 441 | { |
| 442 | /* tear down all of the "sub device types" for this device */ |
| 443 | gb_i2c_disconnect(gdev); |
| 444 | gb_gpio_disconnect(gdev); |
| 445 | gb_sdio_disconnect(gdev); |
| 446 | gb_tty_disconnect(gdev); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 447 | |
| 448 | // FIXME - device_remove(&gdev->dev); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 449 | } |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 450 | |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame^] | 451 | static DEFINE_MUTEX(hd_mutex); |
| 452 | |
| 453 | static void free_hd(struct kref *kref) |
| 454 | { |
| 455 | struct greybus_host_device *hd; |
| 456 | |
| 457 | hd = container_of(kref, struct greybus_host_device, kref); |
| 458 | |
| 459 | kfree(hd); |
| 460 | } |
| 461 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 462 | struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver, |
| 463 | struct device *parent) |
| 464 | { |
| 465 | struct greybus_host_device *hd; |
| 466 | |
| 467 | hd = kzalloc(sizeof(*hd) + driver->hd_priv_size, GFP_KERNEL); |
| 468 | if (!hd) |
| 469 | return NULL; |
| 470 | |
| 471 | kref_init(&hd->kref); |
| 472 | |
| 473 | return hd; |
| 474 | } |
| 475 | EXPORT_SYMBOL_GPL(greybus_create_hd); |
| 476 | |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame^] | 477 | void greybus_remove_hd(struct greybus_host_device *hd) |
| 478 | { |
| 479 | kref_put_mutex(&hd->kref, free_hd, &hd_mutex); |
| 480 | } |
| 481 | EXPORT_SYMBOL_GPL(greybus_remove_hd); |
| 482 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 483 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 484 | static int __init gb_init(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 485 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 486 | int retval; |
| 487 | |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 488 | retval = gb_debugfs_init(); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 489 | if (retval) |
| 490 | return retval; |
| 491 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 492 | retval = bus_register(&greybus_bus_type); |
| 493 | if (retval) |
| 494 | goto error_bus; |
| 495 | |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 496 | retval = gb_thread_init(); |
| 497 | if (retval) |
| 498 | goto error_thread; |
| 499 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 500 | // FIXME - more gb core init goes here |
| 501 | |
| 502 | retval = gb_tty_init(); |
| 503 | if (retval) |
| 504 | goto error_tty; |
| 505 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 506 | return 0; |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 507 | |
| 508 | error_tty: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 509 | gb_thread_destroy(); |
| 510 | |
| 511 | error_thread: |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 512 | bus_unregister(&greybus_bus_type); |
| 513 | |
| 514 | error_bus: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 515 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 516 | |
| 517 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 518 | } |
| 519 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 520 | static void __exit gb_exit(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 521 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 522 | gb_tty_exit(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 523 | bus_unregister(&greybus_bus_type); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 524 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | module_init(gb_init); |
| 528 | module_exit(gb_exit); |
| 529 | |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 530 | MODULE_LICENSE("GPL"); |
| 531 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |