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 | 33ea3a3 | 2014-09-07 15:39:34 -0700 | [diff] [blame] | 213 | |
| 214 | retval = gb_battery_probe(gdev, id); |
| 215 | if (retval) |
| 216 | goto error_battery; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 217 | return 0; |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 218 | |
Greg Kroah-Hartman | 33ea3a3 | 2014-09-07 15:39:34 -0700 | [diff] [blame] | 219 | error_battery: |
| 220 | gb_tty_disconnect(gdev); |
| 221 | |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 222 | error_tty: |
| 223 | gb_sdio_disconnect(gdev); |
| 224 | |
| 225 | error_sdio: |
| 226 | gb_gpio_disconnect(gdev); |
| 227 | |
| 228 | error_gpio: |
| 229 | gb_i2c_disconnect(gdev); |
| 230 | |
| 231 | error_i2c: |
| 232 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Greg Kroah-Hartman | 3be03d4 | 2014-09-01 19:10:06 -0700 | [diff] [blame] | 235 | static const struct greybus_module_id fake_gb_id = { |
| 236 | GREYBUS_DEVICE(0x42, 0x42) |
| 237 | }; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 238 | |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 239 | static int create_function(struct greybus_device *gdev, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 240 | struct greybus_descriptor_function *function, |
| 241 | size_t desc_size) |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 242 | { |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 243 | if (desc_size != sizeof(*function)) { |
| 244 | dev_err(gdev->dev.parent, "invalid function header size %zu\n", |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 245 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 246 | return -EINVAL; |
| 247 | } |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 248 | memcpy(&gdev->function, function, desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | static int create_module_id(struct greybus_device *gdev, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 253 | struct greybus_descriptor_module_id *module_id, |
| 254 | size_t desc_size) |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 255 | { |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 256 | if (desc_size != sizeof(*module_id)) { |
| 257 | dev_err(gdev->dev.parent, "invalid module header size %zu\n", |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 258 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 259 | return -EINVAL; |
| 260 | } |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 261 | memcpy(&gdev->module_id, module_id, desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | static int create_serial_number(struct greybus_device *gdev, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 266 | struct greybus_descriptor_serial_number *serial_num, |
| 267 | size_t desc_size) |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 268 | { |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 269 | if (desc_size != sizeof(*serial_num)) { |
| 270 | dev_err(gdev->dev.parent, "invalid serial number header size %zu\n", |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 271 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 272 | return -EINVAL; |
| 273 | } |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 274 | memcpy(&gdev->serial_number, serial_num, desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | static int create_string(struct greybus_device *gdev, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 279 | struct greybus_descriptor_string *string, |
| 280 | size_t desc_size) |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 281 | { |
| 282 | int string_size; |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 283 | struct gdev_string *gdev_string; |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 284 | |
| 285 | if ((gdev->num_strings + 1) >= MAX_STRINGS_PER_MODULE) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 286 | dev_err(gdev->dev.parent, |
| 287 | "too many strings for this module!\n"); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 288 | return -EINVAL; |
| 289 | } |
| 290 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 291 | if (desc_size < sizeof(*string)) { |
| 292 | dev_err(gdev->dev.parent, "invalid string header size %zu\n", |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 293 | desc_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 294 | return -EINVAL; |
| 295 | } |
| 296 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 297 | string_size = le16_to_cpu(string->length); |
| 298 | gdev_string = kzalloc(sizeof(*gdev_string) + string_size + 1, GFP_KERNEL); |
| 299 | if (!gdev_string) |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 300 | return -ENOMEM; |
| 301 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 302 | gdev_string->length = string_size; |
| 303 | gdev_string->id = string->id; |
| 304 | memcpy(&gdev_string->string, &string->string, string_size); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 305 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 306 | gdev->string[gdev->num_strings] = gdev_string; |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 307 | gdev->num_strings++; |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 312 | static int create_cport(struct greybus_device *gdev, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 313 | struct greybus_descriptor_cport *cport, |
| 314 | size_t desc_size) |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 315 | { |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 316 | struct gdev_cport *gdev_cport; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 317 | |
| 318 | if ((gdev->num_cports + 1) >= MAX_CPORTS_PER_MODULE) { |
| 319 | dev_err(gdev->dev.parent, "too many cports for this module!\n"); |
| 320 | return -EINVAL; |
| 321 | } |
| 322 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 323 | if (desc_size != sizeof(*cport)) { |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 324 | dev_err(gdev->dev.parent, |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 325 | "invalid serial number header size %zu\n", desc_size); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 326 | return -EINVAL; |
| 327 | } |
| 328 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 329 | gdev_cport = kzalloc(sizeof(*gdev_cport), GFP_KERNEL); |
| 330 | if (!gdev_cport) |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 331 | return -ENOMEM; |
| 332 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 333 | gdev_cport->number = le16_to_cpu(cport->number); |
| 334 | gdev_cport->size = le16_to_cpu(cport->size); |
| 335 | gdev_cport->speed = cport->speed; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 336 | |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 337 | gdev->cport[gdev->num_cports] = gdev_cport; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 338 | gdev->num_cports++; |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 343 | /** |
Alex Elder | 05ad189 | 2014-09-09 13:55:03 -0500 | [diff] [blame] | 344 | * greybus_new_module: |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 345 | * |
Alex Elder | 05ad189 | 2014-09-09 13:55:03 -0500 | [diff] [blame] | 346 | * Pass in a buffer that _should_ contain a Greybus module manifest |
| 347 | * and spit out a greybus device structure. |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 348 | */ |
Greg Kroah-Hartman | 6779997 | 2014-09-21 18:17:36 -0700 | [diff] [blame^] | 349 | void gb_add_module(struct greybus_host_device *hd, u8 module_id, u8 *data) |
| 350 | { |
| 351 | // FIXME - should be the new module call... |
| 352 | } |
| 353 | |
Alex Elder | 05ad189 | 2014-09-09 13:55:03 -0500 | [diff] [blame] | 354 | struct greybus_device *greybus_new_module(struct device *parent, |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 355 | int module_number, u8 *data, int size) |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 356 | { |
| 357 | struct greybus_device *gdev; |
Alex Elder | badad68 | 2014-09-09 13:55:04 -0500 | [diff] [blame] | 358 | struct greybus_manifest *manifest; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 359 | int retval; |
| 360 | int overall_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 361 | u8 version_major; |
| 362 | u8 version_minor; |
| 363 | |
Alex Elder | 05ad189 | 2014-09-09 13:55:03 -0500 | [diff] [blame] | 364 | /* we have to have at _least_ the manifest header */ |
Alex Elder | badad68 | 2014-09-09 13:55:04 -0500 | [diff] [blame] | 365 | if (size <= sizeof(manifest->header)) |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 366 | return NULL; |
| 367 | |
| 368 | gdev = kzalloc(sizeof(*gdev), GFP_KERNEL); |
| 369 | if (!gdev) |
| 370 | return NULL; |
| 371 | |
| 372 | gdev->module_number = module_number; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 373 | gdev->dev.parent = parent; |
| 374 | gdev->dev.driver = NULL; |
| 375 | gdev->dev.bus = &greybus_bus_type; |
| 376 | gdev->dev.type = &greybus_module_type; |
| 377 | gdev->dev.groups = greybus_module_groups; |
| 378 | gdev->dev.dma_mask = parent->dma_mask; |
| 379 | device_initialize(&gdev->dev); |
| 380 | dev_set_name(&gdev->dev, "%d", module_number); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 381 | |
Alex Elder | badad68 | 2014-09-09 13:55:04 -0500 | [diff] [blame] | 382 | manifest = (struct greybus_manifest *)data; |
| 383 | overall_size = le16_to_cpu(manifest->header.size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 384 | if (overall_size != size) { |
Alex Elder | 05ad189 | 2014-09-09 13:55:03 -0500 | [diff] [blame] | 385 | dev_err(parent, "size != manifest header size, %d != %d\n", |
| 386 | size, overall_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 387 | goto error; |
| 388 | } |
| 389 | |
Alex Elder | badad68 | 2014-09-09 13:55:04 -0500 | [diff] [blame] | 390 | version_major = manifest->header.version_major; |
| 391 | version_minor = manifest->header.version_minor; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 392 | |
Greg Kroah-Hartman | a1dc62b | 2014-09-13 17:28:19 -0700 | [diff] [blame] | 393 | /* Validate major/minor number */ |
| 394 | if ((version_major != GREYBUS_VERSION_MAJOR) || |
| 395 | (version_minor != GREYBUS_VERSION_MINOR)) { |
| 396 | dev_err(parent, |
| 397 | "Invalid greybus versions, expected %d.%d, got %d.%d\n", |
| 398 | GREYBUS_VERSION_MAJOR, GREYBUS_VERSION_MINOR, |
| 399 | version_major, version_minor); |
| 400 | goto error; |
| 401 | } |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 402 | |
Alex Elder | badad68 | 2014-09-09 13:55:04 -0500 | [diff] [blame] | 403 | size -= sizeof(manifest->header); |
| 404 | data += sizeof(manifest->header); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 405 | while (size > 0) { |
Alex Elder | e82bef4 | 2014-09-09 13:55:09 -0500 | [diff] [blame] | 406 | struct greybus_descriptor *desc; |
| 407 | u16 desc_size; |
| 408 | size_t data_size; |
| 409 | |
Alex Elder | 57fc0a1 | 2014-09-09 13:55:08 -0500 | [diff] [blame] | 410 | if (size < sizeof(desc->header)) { |
| 411 | dev_err(parent, "remaining size %d too small\n", size); |
| 412 | goto error; |
| 413 | } |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 414 | desc = (struct greybus_descriptor *)data; |
| 415 | desc_size = le16_to_cpu(desc->header.size); |
Alex Elder | 57fc0a1 | 2014-09-09 13:55:08 -0500 | [diff] [blame] | 416 | if (size < desc_size) { |
| 417 | dev_err(parent, "descriptor size %d too big\n", |
| 418 | desc_size); |
| 419 | goto error; |
| 420 | } |
Alex Elder | e82bef4 | 2014-09-09 13:55:09 -0500 | [diff] [blame] | 421 | data_size = (size_t)desc_size - sizeof(desc->header); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 422 | |
Alex Elder | a22e15a | 2014-09-09 13:55:07 -0500 | [diff] [blame] | 423 | switch (le16_to_cpu(desc->header.type)) { |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 424 | case GREYBUS_TYPE_FUNCTION: |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 425 | retval = create_function(gdev, &desc->function, |
| 426 | data_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 427 | break; |
| 428 | |
| 429 | case GREYBUS_TYPE_MODULE_ID: |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 430 | retval = create_module_id(gdev, &desc->module_id, |
| 431 | data_size); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 432 | break; |
| 433 | |
| 434 | case GREYBUS_TYPE_SERIAL_NUMBER: |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 435 | retval = create_serial_number(gdev, |
| 436 | &desc->serial_number, |
| 437 | data_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 438 | break; |
| 439 | |
| 440 | case GREYBUS_TYPE_STRING: |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 441 | retval = create_string(gdev, &desc->string, data_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 442 | break; |
| 443 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 444 | case GREYBUS_TYPE_CPORT: |
Greg Kroah-Hartman | 3d54532 | 2014-09-09 17:16:54 -0700 | [diff] [blame] | 445 | retval = create_cport(gdev, &desc->cport, data_size); |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 446 | break; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 447 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 448 | case GREYBUS_TYPE_INVALID: |
| 449 | default: |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 450 | dev_err(parent, "invalid descriptor type %d\n", |
| 451 | desc->header.type); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 452 | goto error; |
| 453 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 454 | if (retval) |
| 455 | goto error; |
| 456 | size -= desc_size; |
| 457 | data += desc_size; |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 458 | } |
Greg Kroah-Hartman | 526c5c8 | 2014-09-01 16:03:31 -0700 | [diff] [blame] | 459 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 460 | retval = gb_init_subdevs(gdev, &fake_gb_id); |
| 461 | if (retval) |
| 462 | goto error; |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 463 | |
| 464 | // FIXME device_add(&gdev->dev); |
| 465 | |
| 466 | |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 467 | return gdev; |
| 468 | error: |
Alex Elder | a5808ad | 2014-09-09 13:55:06 -0500 | [diff] [blame] | 469 | put_device(&gdev->dev); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 470 | greybus_module_release(&gdev->dev); |
Greg Kroah-Hartman | a239f67 | 2014-09-01 14:39:49 -0700 | [diff] [blame] | 471 | return NULL; |
| 472 | } |
| 473 | |
Greg Kroah-Hartman | 6779997 | 2014-09-21 18:17:36 -0700 | [diff] [blame^] | 474 | void gb_remove_module(struct greybus_host_device *hd, u8 module_id) |
| 475 | { |
| 476 | // FIXME should be the remove_device call... |
| 477 | } |
| 478 | |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 479 | void greybus_remove_device(struct greybus_device *gdev) |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 480 | { |
| 481 | /* tear down all of the "sub device types" for this device */ |
| 482 | gb_i2c_disconnect(gdev); |
| 483 | gb_gpio_disconnect(gdev); |
| 484 | gb_sdio_disconnect(gdev); |
| 485 | gb_tty_disconnect(gdev); |
Greg Kroah-Hartman | 33ea3a3 | 2014-09-07 15:39:34 -0700 | [diff] [blame] | 486 | gb_battery_disconnect(gdev); |
Greg Kroah-Hartman | b94295e | 2014-09-01 18:34:28 -0700 | [diff] [blame] | 487 | |
| 488 | // FIXME - device_remove(&gdev->dev); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 489 | } |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 490 | |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 491 | static DEFINE_MUTEX(hd_mutex); |
| 492 | |
| 493 | static void free_hd(struct kref *kref) |
| 494 | { |
| 495 | struct greybus_host_device *hd; |
| 496 | |
| 497 | hd = container_of(kref, struct greybus_host_device, kref); |
| 498 | |
| 499 | kfree(hd); |
| 500 | } |
| 501 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 502 | struct greybus_host_device *greybus_create_hd(struct greybus_host_driver *driver, |
| 503 | struct device *parent) |
| 504 | { |
| 505 | struct greybus_host_device *hd; |
| 506 | |
| 507 | hd = kzalloc(sizeof(*hd) + driver->hd_priv_size, GFP_KERNEL); |
| 508 | if (!hd) |
| 509 | return NULL; |
| 510 | |
| 511 | kref_init(&hd->kref); |
Greg Kroah-Hartman | 772149b | 2014-09-14 12:27:28 -0700 | [diff] [blame] | 512 | hd->parent = parent; |
| 513 | hd->driver = driver; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 514 | |
| 515 | return hd; |
| 516 | } |
| 517 | EXPORT_SYMBOL_GPL(greybus_create_hd); |
| 518 | |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 519 | void greybus_remove_hd(struct greybus_host_device *hd) |
| 520 | { |
| 521 | kref_put_mutex(&hd->kref, free_hd, &hd_mutex); |
| 522 | } |
| 523 | EXPORT_SYMBOL_GPL(greybus_remove_hd); |
| 524 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 525 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 526 | static int __init gb_init(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 527 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 528 | int retval; |
| 529 | |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 530 | retval = gb_debugfs_init(); |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 531 | if (retval) { |
| 532 | pr_err("debugfs failed\n"); |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 533 | return retval; |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 534 | } |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 535 | |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 536 | retval = bus_register(&greybus_bus_type); |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 537 | if (retval) { |
| 538 | pr_err("bus_register failed\n"); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 539 | goto error_bus; |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 540 | } |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 541 | |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 542 | retval = gb_ap_init(); |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 543 | if (retval) { |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 544 | pr_err("gb_ap_init failed\n"); |
| 545 | goto error_ap; |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 546 | } |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 547 | |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 548 | retval = gb_gbuf_init(); |
| 549 | if (retval) { |
| 550 | pr_err("gb_gbuf_init failed\n"); |
| 551 | goto error_gbuf; |
| 552 | } |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 553 | |
| 554 | retval = gb_tty_init(); |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 555 | if (retval) { |
| 556 | pr_err("gb_tty_init failed\n"); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 557 | goto error_tty; |
Greg Kroah-Hartman | 168db1c | 2014-09-13 16:15:52 -0700 | [diff] [blame] | 558 | } |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 559 | |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 560 | return 0; |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 561 | |
| 562 | error_tty: |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 563 | gb_gbuf_exit(); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 564 | |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 565 | error_gbuf: |
| 566 | gb_ap_exit(); |
| 567 | |
| 568 | error_ap: |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 569 | bus_unregister(&greybus_bus_type); |
| 570 | |
| 571 | error_bus: |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 572 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 573 | |
| 574 | return retval; |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 575 | } |
| 576 | |
Greg Kroah-Hartman | 503c1cd | 2014-08-30 16:21:03 -0700 | [diff] [blame] | 577 | static void __exit gb_exit(void) |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 578 | { |
Greg Kroah-Hartman | db6e1fd | 2014-08-30 16:47:26 -0700 | [diff] [blame] | 579 | gb_tty_exit(); |
Greg Kroah-Hartman | 45f3678 | 2014-09-14 11:40:35 -0700 | [diff] [blame] | 580 | gb_gbuf_exit(); |
| 581 | gb_ap_exit(); |
Greg Kroah-Hartman | 27fb831 | 2014-08-31 13:54:59 -0700 | [diff] [blame] | 582 | bus_unregister(&greybus_bus_type); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 583 | gb_debugfs_cleanup(); |
Greg Kroah-Hartman | 199d68d | 2014-08-30 16:20:22 -0700 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | module_init(gb_init); |
| 587 | module_exit(gb_exit); |
| 588 | |
Greg Kroah-Hartman | c8a797a | 2014-08-11 15:30:45 +0800 | [diff] [blame] | 589 | MODULE_LICENSE("GPL"); |
| 590 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |