| 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // Driver to instantiate Chromebook i2c/smbus devices. |
| 3 | // |
| 4 | // Copyright (C) 2012 Google, Inc. |
| 5 | // Author: Benson Leung <bleung@chromium.org> |
| 6 | |
| 7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 8 | |
| 9 | #include <linux/acpi.h> |
| 10 | #include <linux/dmi.h> |
| 11 | #include <linux/i2c.h> |
| 12 | #include <linux/input.h> |
| 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/ioport.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/pci.h> |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/property.h> |
| 19 | |
| 20 | #define ATMEL_TP_I2C_ADDR 0x4b |
| 21 | #define ATMEL_TP_I2C_BL_ADDR 0x25 |
| 22 | #define ATMEL_TS_I2C_ADDR 0x4a |
| 23 | #define ATMEL_TS_I2C_BL_ADDR 0x26 |
| 24 | #define CYAPA_TP_I2C_ADDR 0x67 |
| 25 | #define ELAN_TP_I2C_ADDR 0x15 |
| 26 | #define ISL_ALS_I2C_ADDR 0x44 |
| 27 | #define TAOS_ALS_I2C_ADDR 0x29 |
| 28 | |
| 29 | static const char *i2c_adapter_names[] = { |
| 30 | "SMBus I801 adapter", |
| 31 | "i915 gmbus vga", |
| 32 | "i915 gmbus panel", |
| 33 | "Synopsys DesignWare I2C adapter", |
| 34 | }; |
| 35 | |
| 36 | /* Keep this enum consistent with i2c_adapter_names */ |
| 37 | enum i2c_adapter_type { |
| 38 | I2C_ADAPTER_SMBUS = 0, |
| 39 | I2C_ADAPTER_VGADDC, |
| 40 | I2C_ADAPTER_PANEL, |
| 41 | I2C_ADAPTER_DESIGNWARE, |
| 42 | }; |
| 43 | |
| 44 | struct i2c_peripheral { |
| 45 | struct i2c_board_info board_info; |
| 46 | unsigned short alt_addr; |
| 47 | |
| 48 | const char *dmi_name; |
| 49 | unsigned long irqflags; |
| 50 | struct resource irq_resource; |
| 51 | |
| 52 | enum i2c_adapter_type type; |
| 53 | u32 pci_devid; |
| 54 | |
| 55 | const struct property_entry *properties; |
| 56 | |
| 57 | struct i2c_client *client; |
| 58 | }; |
| 59 | |
| 60 | struct acpi_peripheral { |
| 61 | char hid[ACPI_ID_LEN]; |
| 62 | struct software_node swnode; |
| 63 | struct i2c_client *client; |
| 64 | }; |
| 65 | |
| 66 | struct chromeos_laptop { |
| 67 | /* |
| 68 | * Note that we can't mark this pointer as const because |
| 69 | * i2c_new_scanned_device() changes passed in I2C board info, so. |
| 70 | */ |
| 71 | struct i2c_peripheral *i2c_peripherals; |
| 72 | unsigned int num_i2c_peripherals; |
| 73 | |
| 74 | struct acpi_peripheral *acpi_peripherals; |
| 75 | unsigned int num_acpi_peripherals; |
| 76 | }; |
| 77 | |
| 78 | static const struct chromeos_laptop *cros_laptop; |
| 79 | |
| 80 | static struct i2c_client * |
| 81 | chromes_laptop_instantiate_i2c_device(struct i2c_adapter *adapter, |
| 82 | struct i2c_board_info *info, |
| 83 | unsigned short alt_addr) |
| 84 | { |
| 85 | const unsigned short addr_list[] = { info->addr, I2C_CLIENT_END }; |
| 86 | struct i2c_client *client; |
| 87 | |
| 88 | /* |
| 89 | * Add the i2c device. If we can't detect it at the primary |
| 90 | * address we scan secondary addresses. In any case the client |
| 91 | * structure gets assigned primary address. |
| 92 | */ |
| 93 | client = i2c_new_scanned_device(adapter, info, addr_list, NULL); |
| 94 | if (IS_ERR(client) && alt_addr) { |
| 95 | struct i2c_board_info dummy_info = { |
| 96 | I2C_BOARD_INFO("dummy", info->addr), |
| 97 | }; |
| 98 | const unsigned short alt_addr_list[] = { |
| 99 | alt_addr, I2C_CLIENT_END |
| 100 | }; |
| 101 | struct i2c_client *dummy; |
| 102 | |
| 103 | dummy = i2c_new_scanned_device(adapter, &dummy_info, |
| 104 | alt_addr_list, NULL); |
| 105 | if (!IS_ERR(dummy)) { |
| 106 | pr_debug("%d-%02x is probed at %02x\n", |
| 107 | adapter->nr, info->addr, dummy->addr); |
| 108 | i2c_unregister_device(dummy); |
| 109 | client = i2c_new_client_device(adapter, info); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | if (IS_ERR(client)) { |
| 114 | client = NULL; |
| 115 | pr_debug("failed to register device %d-%02x\n", |
| 116 | adapter->nr, info->addr); |
| 117 | } else { |
| 118 | pr_debug("added i2c device %d-%02x\n", |
| 119 | adapter->nr, info->addr); |
| 120 | } |
| 121 | |
| 122 | return client; |
| 123 | } |
| 124 | |
| 125 | static bool chromeos_laptop_match_adapter_devid(struct device *dev, u32 devid) |
| 126 | { |
| 127 | struct pci_dev *pdev; |
| 128 | |
| 129 | if (!dev_is_pci(dev)) |
| 130 | return false; |
| 131 | |
| 132 | pdev = to_pci_dev(dev); |
| 133 | return devid == pci_dev_id(pdev); |
| 134 | } |
| 135 | |
| 136 | static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter) |
| 137 | { |
| 138 | struct i2c_peripheral *i2c_dev; |
| 139 | int i; |
| 140 | |
| 141 | for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
| 142 | i2c_dev = &cros_laptop->i2c_peripherals[i]; |
| 143 | |
| 144 | /* Skip devices already created */ |
| 145 | if (i2c_dev->client) |
| 146 | continue; |
| 147 | |
| 148 | if (strncmp(adapter->name, i2c_adapter_names[i2c_dev->type], |
| 149 | strlen(i2c_adapter_names[i2c_dev->type]))) |
| 150 | continue; |
| 151 | |
| 152 | if (i2c_dev->pci_devid && |
| 153 | !chromeos_laptop_match_adapter_devid(adapter->dev.parent, |
| 154 | i2c_dev->pci_devid)) { |
| 155 | continue; |
| 156 | } |
| 157 | |
| 158 | i2c_dev->client = |
| 159 | chromes_laptop_instantiate_i2c_device(adapter, |
| 160 | &i2c_dev->board_info, |
| 161 | i2c_dev->alt_addr); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | static bool chromeos_laptop_adjust_client(struct i2c_client *client) |
| 166 | { |
| 167 | struct acpi_peripheral *acpi_dev; |
| 168 | struct acpi_device_id acpi_ids[2] = { }; |
| 169 | int i; |
| 170 | int error; |
| 171 | |
| 172 | if (!has_acpi_companion(&client->dev)) |
| 173 | return false; |
| 174 | |
| 175 | for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) { |
| 176 | acpi_dev = &cros_laptop->acpi_peripherals[i]; |
| 177 | |
| 178 | memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN); |
| 179 | |
| 180 | if (acpi_match_device(acpi_ids, &client->dev)) { |
| 181 | error = device_add_software_node(&client->dev, &acpi_dev->swnode); |
| 182 | if (error) { |
| 183 | dev_err(&client->dev, |
| 184 | "failed to add properties: %d\n", |
| 185 | error); |
| 186 | break; |
| 187 | } |
| 188 | |
| 189 | acpi_dev->client = client; |
| 190 | |
| 191 | return true; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | return false; |
| 196 | } |
| 197 | |
| 198 | static void chromeos_laptop_detach_i2c_client(struct i2c_client *client) |
| 199 | { |
| 200 | struct acpi_peripheral *acpi_dev; |
| 201 | struct i2c_peripheral *i2c_dev; |
| 202 | int i; |
| 203 | |
| 204 | if (has_acpi_companion(&client->dev)) |
| 205 | for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) { |
| 206 | acpi_dev = &cros_laptop->acpi_peripherals[i]; |
| 207 | |
| 208 | if (acpi_dev->client == client) { |
| 209 | acpi_dev->client = NULL; |
| 210 | return; |
| 211 | } |
| 212 | } |
| 213 | else |
| 214 | for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
| 215 | i2c_dev = &cros_laptop->i2c_peripherals[i]; |
| 216 | |
| 217 | if (i2c_dev->client == client) { |
| 218 | i2c_dev->client = NULL; |
| 219 | return; |
| 220 | } |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb, |
| 225 | unsigned long action, void *data) |
| 226 | { |
| 227 | struct device *dev = data; |
| 228 | |
| 229 | switch (action) { |
| 230 | case BUS_NOTIFY_ADD_DEVICE: |
| 231 | if (dev->type == &i2c_adapter_type) |
| 232 | chromeos_laptop_check_adapter(to_i2c_adapter(dev)); |
| 233 | else if (dev->type == &i2c_client_type) |
| 234 | chromeos_laptop_adjust_client(to_i2c_client(dev)); |
| 235 | break; |
| 236 | |
| 237 | case BUS_NOTIFY_REMOVED_DEVICE: |
| 238 | if (dev->type == &i2c_client_type) |
| 239 | chromeos_laptop_detach_i2c_client(to_i2c_client(dev)); |
| 240 | break; |
| 241 | } |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static struct notifier_block chromeos_laptop_i2c_notifier = { |
| 247 | .notifier_call = chromeos_laptop_i2c_notifier_call, |
| 248 | }; |
| 249 | |
| 250 | #define DECLARE_CROS_LAPTOP(_name) \ |
| 251 | static const struct chromeos_laptop _name __initconst = { \ |
| 252 | .i2c_peripherals = _name##_peripherals, \ |
| 253 | .num_i2c_peripherals = ARRAY_SIZE(_name##_peripherals), \ |
| 254 | } |
| 255 | |
| 256 | #define DECLARE_ACPI_CROS_LAPTOP(_name) \ |
| 257 | static const struct chromeos_laptop _name __initconst = { \ |
| 258 | .acpi_peripherals = _name##_peripherals, \ |
| 259 | .num_acpi_peripherals = ARRAY_SIZE(_name##_peripherals), \ |
| 260 | } |
| 261 | |
| 262 | static struct i2c_peripheral samsung_series_5_550_peripherals[] __initdata = { |
| 263 | /* Touchpad. */ |
| 264 | { |
| 265 | .board_info = { |
| 266 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 267 | .flags = I2C_CLIENT_WAKE, |
| 268 | }, |
| 269 | .dmi_name = "trackpad", |
| 270 | .type = I2C_ADAPTER_SMBUS, |
| 271 | }, |
| 272 | /* Light Sensor. */ |
| 273 | { |
| 274 | .board_info = { |
| 275 | I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
| 276 | }, |
| 277 | .dmi_name = "lightsensor", |
| 278 | .type = I2C_ADAPTER_SMBUS, |
| 279 | }, |
| 280 | }; |
| 281 | DECLARE_CROS_LAPTOP(samsung_series_5_550); |
| 282 | |
| 283 | static struct i2c_peripheral samsung_series_5_peripherals[] __initdata = { |
| 284 | /* Light Sensor. */ |
| 285 | { |
| 286 | .board_info = { |
| 287 | I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR), |
| 288 | }, |
| 289 | .type = I2C_ADAPTER_SMBUS, |
| 290 | }, |
| 291 | }; |
| 292 | DECLARE_CROS_LAPTOP(samsung_series_5); |
| 293 | |
| 294 | static const int chromebook_pixel_tp_keys[] __initconst = { |
| 295 | KEY_RESERVED, |
| 296 | KEY_RESERVED, |
| 297 | KEY_RESERVED, |
| 298 | KEY_RESERVED, |
| 299 | KEY_RESERVED, |
| 300 | BTN_LEFT |
| 301 | }; |
| 302 | |
| 303 | static const struct property_entry |
| 304 | chromebook_pixel_trackpad_props[] __initconst = { |
| 305 | PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
| 306 | PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", chromebook_pixel_tp_keys), |
| 307 | { } |
| 308 | }; |
| 309 | |
| 310 | static const struct property_entry |
| 311 | chromebook_atmel_touchscreen_props[] __initconst = { |
| 312 | PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
| 313 | { } |
| 314 | }; |
| 315 | |
| 316 | static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = { |
| 317 | /* Touch Screen. */ |
| 318 | { |
| 319 | .board_info = { |
| 320 | I2C_BOARD_INFO("atmel_mxt_ts", |
| 321 | ATMEL_TS_I2C_ADDR), |
| 322 | .flags = I2C_CLIENT_WAKE, |
| 323 | }, |
| 324 | .dmi_name = "touchscreen", |
| 325 | .irqflags = IRQF_TRIGGER_FALLING, |
| 326 | .type = I2C_ADAPTER_PANEL, |
| 327 | .alt_addr = ATMEL_TS_I2C_BL_ADDR, |
| 328 | .properties = chromebook_atmel_touchscreen_props, |
| 329 | }, |
| 330 | /* Touchpad. */ |
| 331 | { |
| 332 | .board_info = { |
| 333 | I2C_BOARD_INFO("atmel_mxt_tp", |
| 334 | ATMEL_TP_I2C_ADDR), |
| 335 | .flags = I2C_CLIENT_WAKE, |
| 336 | }, |
| 337 | .dmi_name = "trackpad", |
| 338 | .irqflags = IRQF_TRIGGER_FALLING, |
| 339 | .type = I2C_ADAPTER_VGADDC, |
| 340 | .alt_addr = ATMEL_TP_I2C_BL_ADDR, |
| 341 | .properties = chromebook_pixel_trackpad_props, |
| 342 | }, |
| 343 | /* Light Sensor. */ |
| 344 | { |
| 345 | .board_info = { |
| 346 | I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
| 347 | }, |
| 348 | .dmi_name = "lightsensor", |
| 349 | .type = I2C_ADAPTER_PANEL, |
| 350 | }, |
| 351 | }; |
| 352 | DECLARE_CROS_LAPTOP(chromebook_pixel); |
| 353 | |
| 354 | static struct i2c_peripheral hp_chromebook_14_peripherals[] __initdata = { |
| 355 | /* Touchpad. */ |
| 356 | { |
| 357 | .board_info = { |
| 358 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 359 | .flags = I2C_CLIENT_WAKE, |
| 360 | }, |
| 361 | .dmi_name = "trackpad", |
| 362 | .type = I2C_ADAPTER_DESIGNWARE, |
| 363 | }, |
| 364 | }; |
| 365 | DECLARE_CROS_LAPTOP(hp_chromebook_14); |
| 366 | |
| 367 | static struct i2c_peripheral dell_chromebook_11_peripherals[] __initdata = { |
| 368 | /* Touchpad. */ |
| 369 | { |
| 370 | .board_info = { |
| 371 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 372 | .flags = I2C_CLIENT_WAKE, |
| 373 | }, |
| 374 | .dmi_name = "trackpad", |
| 375 | .type = I2C_ADAPTER_DESIGNWARE, |
| 376 | }, |
| 377 | /* Elan Touchpad option. */ |
| 378 | { |
| 379 | .board_info = { |
| 380 | I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR), |
| 381 | .flags = I2C_CLIENT_WAKE, |
| 382 | }, |
| 383 | .dmi_name = "trackpad", |
| 384 | .type = I2C_ADAPTER_DESIGNWARE, |
| 385 | }, |
| 386 | }; |
| 387 | DECLARE_CROS_LAPTOP(dell_chromebook_11); |
| 388 | |
| 389 | static struct i2c_peripheral toshiba_cb35_peripherals[] __initdata = { |
| 390 | /* Touchpad. */ |
| 391 | { |
| 392 | .board_info = { |
| 393 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 394 | .flags = I2C_CLIENT_WAKE, |
| 395 | }, |
| 396 | .dmi_name = "trackpad", |
| 397 | .type = I2C_ADAPTER_DESIGNWARE, |
| 398 | }, |
| 399 | }; |
| 400 | DECLARE_CROS_LAPTOP(toshiba_cb35); |
| 401 | |
| 402 | static struct i2c_peripheral acer_c7_chromebook_peripherals[] __initdata = { |
| 403 | /* Touchpad. */ |
| 404 | { |
| 405 | .board_info = { |
| 406 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 407 | .flags = I2C_CLIENT_WAKE, |
| 408 | }, |
| 409 | .dmi_name = "trackpad", |
| 410 | .type = I2C_ADAPTER_SMBUS, |
| 411 | }, |
| 412 | }; |
| 413 | DECLARE_CROS_LAPTOP(acer_c7_chromebook); |
| 414 | |
| 415 | static struct i2c_peripheral acer_ac700_peripherals[] __initdata = { |
| 416 | /* Light Sensor. */ |
| 417 | { |
| 418 | .board_info = { |
| 419 | I2C_BOARD_INFO("tsl2583", TAOS_ALS_I2C_ADDR), |
| 420 | }, |
| 421 | .type = I2C_ADAPTER_SMBUS, |
| 422 | }, |
| 423 | }; |
| 424 | DECLARE_CROS_LAPTOP(acer_ac700); |
| 425 | |
| 426 | static struct i2c_peripheral acer_c720_peripherals[] __initdata = { |
| 427 | /* Touchscreen. */ |
| 428 | { |
| 429 | .board_info = { |
| 430 | I2C_BOARD_INFO("atmel_mxt_ts", |
| 431 | ATMEL_TS_I2C_ADDR), |
| 432 | .flags = I2C_CLIENT_WAKE, |
| 433 | }, |
| 434 | .dmi_name = "touchscreen", |
| 435 | .irqflags = IRQF_TRIGGER_FALLING, |
| 436 | .type = I2C_ADAPTER_DESIGNWARE, |
| 437 | .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)), |
| 438 | .alt_addr = ATMEL_TS_I2C_BL_ADDR, |
| 439 | .properties = chromebook_atmel_touchscreen_props, |
| 440 | }, |
| 441 | /* Touchpad. */ |
| 442 | { |
| 443 | .board_info = { |
| 444 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 445 | .flags = I2C_CLIENT_WAKE, |
| 446 | }, |
| 447 | .dmi_name = "trackpad", |
| 448 | .type = I2C_ADAPTER_DESIGNWARE, |
| 449 | .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)), |
| 450 | }, |
| 451 | /* Elan Touchpad option. */ |
| 452 | { |
| 453 | .board_info = { |
| 454 | I2C_BOARD_INFO("elan_i2c", ELAN_TP_I2C_ADDR), |
| 455 | .flags = I2C_CLIENT_WAKE, |
| 456 | }, |
| 457 | .dmi_name = "trackpad", |
| 458 | .type = I2C_ADAPTER_DESIGNWARE, |
| 459 | .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x1)), |
| 460 | }, |
| 461 | /* Light Sensor. */ |
| 462 | { |
| 463 | .board_info = { |
| 464 | I2C_BOARD_INFO("isl29018", ISL_ALS_I2C_ADDR), |
| 465 | }, |
| 466 | .dmi_name = "lightsensor", |
| 467 | .type = I2C_ADAPTER_DESIGNWARE, |
| 468 | .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)), |
| 469 | }, |
| 470 | }; |
| 471 | DECLARE_CROS_LAPTOP(acer_c720); |
| 472 | |
| 473 | static struct i2c_peripheral |
| 474 | hp_pavilion_14_chromebook_peripherals[] __initdata = { |
| 475 | /* Touchpad. */ |
| 476 | { |
| 477 | .board_info = { |
| 478 | I2C_BOARD_INFO("cyapa", CYAPA_TP_I2C_ADDR), |
| 479 | .flags = I2C_CLIENT_WAKE, |
| 480 | }, |
| 481 | .dmi_name = "trackpad", |
| 482 | .type = I2C_ADAPTER_SMBUS, |
| 483 | }, |
| 484 | }; |
| 485 | DECLARE_CROS_LAPTOP(hp_pavilion_14_chromebook); |
| 486 | |
| 487 | static struct i2c_peripheral cr48_peripherals[] __initdata = { |
| 488 | /* Light Sensor. */ |
| 489 | { |
| 490 | .board_info = { |
| 491 | I2C_BOARD_INFO("tsl2563", TAOS_ALS_I2C_ADDR), |
| 492 | }, |
| 493 | .type = I2C_ADAPTER_SMBUS, |
| 494 | }, |
| 495 | }; |
| 496 | DECLARE_CROS_LAPTOP(cr48); |
| 497 | |
| 498 | static const u32 samus_touchpad_buttons[] __initconst = { |
| 499 | KEY_RESERVED, |
| 500 | KEY_RESERVED, |
| 501 | KEY_RESERVED, |
| 502 | BTN_LEFT |
| 503 | }; |
| 504 | |
| 505 | static const struct property_entry samus_trackpad_props[] __initconst = { |
| 506 | PROPERTY_ENTRY_STRING("compatible", "atmel,maxtouch"), |
| 507 | PROPERTY_ENTRY_U32_ARRAY("linux,gpio-keymap", samus_touchpad_buttons), |
| 508 | { } |
| 509 | }; |
| 510 | |
| 511 | static struct acpi_peripheral samus_peripherals[] __initdata = { |
| 512 | /* Touchpad */ |
| 513 | { |
| 514 | .hid = "ATML0000", |
| 515 | .swnode = { |
| 516 | .properties = samus_trackpad_props, |
| 517 | }, |
| 518 | }, |
| 519 | /* Touchsceen */ |
| 520 | { |
| 521 | .hid = "ATML0001", |
| 522 | .swnode = { |
| 523 | .properties = chromebook_atmel_touchscreen_props, |
| 524 | }, |
| 525 | }, |
| 526 | }; |
| 527 | DECLARE_ACPI_CROS_LAPTOP(samus); |
| 528 | |
| 529 | static struct acpi_peripheral generic_atmel_peripherals[] __initdata = { |
| 530 | /* Touchpad */ |
| 531 | { |
| 532 | .hid = "ATML0000", |
| 533 | .swnode = { |
| 534 | .properties = chromebook_pixel_trackpad_props, |
| 535 | }, |
| 536 | }, |
| 537 | /* Touchsceen */ |
| 538 | { |
| 539 | .hid = "ATML0001", |
| 540 | .swnode = { |
| 541 | .properties = chromebook_atmel_touchscreen_props, |
| 542 | }, |
| 543 | }, |
| 544 | }; |
| 545 | DECLARE_ACPI_CROS_LAPTOP(generic_atmel); |
| 546 | |
| 547 | static const struct dmi_system_id chromeos_laptop_dmi_table[] __initconst = { |
| 548 | { |
| 549 | .ident = "Samsung Series 5 550", |
| 550 | .matches = { |
| 551 | DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG"), |
| 552 | DMI_MATCH(DMI_PRODUCT_NAME, "Lumpy"), |
| 553 | }, |
| 554 | .driver_data = (void *)&samsung_series_5_550, |
| 555 | }, |
| 556 | { |
| 557 | .ident = "Samsung Series 5", |
| 558 | .matches = { |
| 559 | DMI_MATCH(DMI_PRODUCT_NAME, "Alex"), |
| 560 | }, |
| 561 | .driver_data = (void *)&samsung_series_5, |
| 562 | }, |
| 563 | { |
| 564 | .ident = "Chromebook Pixel", |
| 565 | .matches = { |
| 566 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
| 567 | DMI_MATCH(DMI_PRODUCT_NAME, "Link"), |
| 568 | }, |
| 569 | .driver_data = (void *)&chromebook_pixel, |
| 570 | }, |
| 571 | { |
| 572 | .ident = "Wolf", |
| 573 | .matches = { |
| 574 | DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"), |
| 575 | DMI_MATCH(DMI_PRODUCT_NAME, "Wolf"), |
| 576 | }, |
| 577 | .driver_data = (void *)&dell_chromebook_11, |
| 578 | }, |
| 579 | { |
| 580 | .ident = "HP Chromebook 14", |
| 581 | .matches = { |
| 582 | DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"), |
| 583 | DMI_MATCH(DMI_PRODUCT_NAME, "Falco"), |
| 584 | }, |
| 585 | .driver_data = (void *)&hp_chromebook_14, |
| 586 | }, |
| 587 | { |
| 588 | .ident = "Toshiba CB35", |
| 589 | .matches = { |
| 590 | DMI_MATCH(DMI_BIOS_VENDOR, "coreboot"), |
| 591 | DMI_MATCH(DMI_PRODUCT_NAME, "Leon"), |
| 592 | }, |
| 593 | .driver_data = (void *)&toshiba_cb35, |
| 594 | }, |
| 595 | { |
| 596 | .ident = "Acer C7 Chromebook", |
| 597 | .matches = { |
| 598 | DMI_MATCH(DMI_PRODUCT_NAME, "Parrot"), |
| 599 | }, |
| 600 | .driver_data = (void *)&acer_c7_chromebook, |
| 601 | }, |
| 602 | { |
| 603 | .ident = "Acer AC700", |
| 604 | .matches = { |
| 605 | DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"), |
| 606 | }, |
| 607 | .driver_data = (void *)&acer_ac700, |
| 608 | }, |
| 609 | { |
| 610 | .ident = "Acer C720", |
| 611 | .matches = { |
| 612 | DMI_MATCH(DMI_PRODUCT_NAME, "Peppy"), |
| 613 | }, |
| 614 | .driver_data = (void *)&acer_c720, |
| 615 | }, |
| 616 | { |
| 617 | .ident = "HP Pavilion 14 Chromebook", |
| 618 | .matches = { |
| 619 | DMI_MATCH(DMI_PRODUCT_NAME, "Butterfly"), |
| 620 | }, |
| 621 | .driver_data = (void *)&hp_pavilion_14_chromebook, |
| 622 | }, |
| 623 | { |
| 624 | .ident = "Cr-48", |
| 625 | .matches = { |
| 626 | DMI_MATCH(DMI_PRODUCT_NAME, "Mario"), |
| 627 | }, |
| 628 | .driver_data = (void *)&cr48, |
| 629 | }, |
| 630 | /* Devices with peripherals incompletely described in ACPI */ |
| 631 | { |
| 632 | .ident = "Chromebook Pro", |
| 633 | .matches = { |
| 634 | DMI_MATCH(DMI_SYS_VENDOR, "Google"), |
| 635 | DMI_MATCH(DMI_PRODUCT_NAME, "Caroline"), |
| 636 | }, |
| 637 | .driver_data = (void *)&samus, |
| 638 | }, |
| 639 | { |
| 640 | .ident = "Google Pixel 2 (2015)", |
| 641 | .matches = { |
| 642 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
| 643 | DMI_MATCH(DMI_PRODUCT_NAME, "Samus"), |
| 644 | }, |
| 645 | .driver_data = (void *)&samus, |
| 646 | }, |
| 647 | { |
| 648 | .ident = "Samsung Chromebook 3", |
| 649 | .matches = { |
| 650 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
| 651 | DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), |
| 652 | }, |
| 653 | .driver_data = (void *)&samus, |
| 654 | }, |
| 655 | { |
| 656 | /* |
| 657 | * Other Chromebooks with Atmel touch controllers: |
| 658 | * - Winky (touchpad) |
| 659 | * - Clapper, Expresso, Rambi, Glimmer (touchscreen) |
| 660 | */ |
| 661 | .ident = "Other Chromebook", |
| 662 | .matches = { |
| 663 | /* |
| 664 | * This will match all Google devices, not only devices |
| 665 | * with Atmel, but we will validate that the device |
| 666 | * actually has matching peripherals. |
| 667 | */ |
| 668 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), |
| 669 | }, |
| 670 | .driver_data = (void *)&generic_atmel, |
| 671 | }, |
| 672 | { } |
| 673 | }; |
| 674 | MODULE_DEVICE_TABLE(dmi, chromeos_laptop_dmi_table); |
| 675 | |
| 676 | static int __init chromeos_laptop_scan_peripherals(struct device *dev, void *data) |
| 677 | { |
| 678 | int error; |
| 679 | |
| 680 | if (dev->type == &i2c_adapter_type) { |
| 681 | chromeos_laptop_check_adapter(to_i2c_adapter(dev)); |
| 682 | } else if (dev->type == &i2c_client_type) { |
| 683 | if (chromeos_laptop_adjust_client(to_i2c_client(dev))) { |
| 684 | /* |
| 685 | * Now that we have needed properties re-trigger |
| 686 | * driver probe in case driver was initialized |
| 687 | * earlier and probe failed. |
| 688 | */ |
| 689 | error = device_attach(dev); |
| 690 | if (error < 0) |
| 691 | dev_warn(dev, |
| 692 | "%s: device_attach() failed: %d\n", |
| 693 | __func__, error); |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | return 0; |
| 698 | } |
| 699 | |
| 700 | static int __init chromeos_laptop_get_irq_from_dmi(const char *dmi_name) |
| 701 | { |
| 702 | const struct dmi_device *dmi_dev; |
| 703 | const struct dmi_dev_onboard *dev_data; |
| 704 | |
| 705 | dmi_dev = dmi_find_device(DMI_DEV_TYPE_DEV_ONBOARD, dmi_name, NULL); |
| 706 | if (!dmi_dev) { |
| 707 | pr_err("failed to find DMI device '%s'\n", dmi_name); |
| 708 | return -ENOENT; |
| 709 | } |
| 710 | |
| 711 | dev_data = dmi_dev->device_data; |
| 712 | if (!dev_data) { |
| 713 | pr_err("failed to get data from DMI for '%s'\n", dmi_name); |
| 714 | return -EINVAL; |
| 715 | } |
| 716 | |
| 717 | return dev_data->instance; |
| 718 | } |
| 719 | |
| 720 | static int __init chromeos_laptop_setup_irq(struct i2c_peripheral *i2c_dev) |
| 721 | { |
| 722 | int irq; |
| 723 | |
| 724 | if (i2c_dev->dmi_name) { |
| 725 | irq = chromeos_laptop_get_irq_from_dmi(i2c_dev->dmi_name); |
| 726 | if (irq < 0) |
| 727 | return irq; |
| 728 | |
| 729 | i2c_dev->irq_resource = (struct resource) |
| 730 | DEFINE_RES_NAMED(irq, 1, NULL, |
| 731 | IORESOURCE_IRQ | i2c_dev->irqflags); |
| 732 | i2c_dev->board_info.resources = &i2c_dev->irq_resource; |
| 733 | i2c_dev->board_info.num_resources = 1; |
| 734 | } |
| 735 | |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | static int __init |
| 740 | chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop, |
| 741 | const struct chromeos_laptop *src) |
| 742 | { |
| 743 | struct i2c_peripheral *i2c_peripherals; |
| 744 | struct i2c_peripheral *i2c_dev; |
| 745 | struct i2c_board_info *info; |
| 746 | int i; |
| 747 | int error; |
| 748 | |
| 749 | if (!src->num_i2c_peripherals) |
| 750 | return 0; |
| 751 | |
| 752 | i2c_peripherals = kmemdup_array(src->i2c_peripherals, |
| 753 | src->num_i2c_peripherals, |
| 754 | sizeof(*i2c_peripherals), GFP_KERNEL); |
| 755 | if (!i2c_peripherals) |
| 756 | return -ENOMEM; |
| 757 | |
| 758 | for (i = 0; i < src->num_i2c_peripherals; i++) { |
| 759 | i2c_dev = &i2c_peripherals[i]; |
| 760 | info = &i2c_dev->board_info; |
| 761 | |
| 762 | error = chromeos_laptop_setup_irq(i2c_dev); |
| 763 | if (error) |
| 764 | goto err_out; |
| 765 | |
| 766 | /* Create primary fwnode for the device - copies everything */ |
| 767 | if (i2c_dev->properties) { |
| 768 | info->fwnode = fwnode_create_software_node(i2c_dev->properties, NULL); |
| 769 | if (IS_ERR(info->fwnode)) { |
| 770 | error = PTR_ERR(info->fwnode); |
| 771 | goto err_out; |
| 772 | } |
| 773 | } |
| 774 | } |
| 775 | |
| 776 | cros_laptop->i2c_peripherals = i2c_peripherals; |
| 777 | cros_laptop->num_i2c_peripherals = src->num_i2c_peripherals; |
| 778 | |
| 779 | return 0; |
| 780 | |
| 781 | err_out: |
| 782 | while (--i >= 0) { |
| 783 | i2c_dev = &i2c_peripherals[i]; |
| 784 | info = &i2c_dev->board_info; |
| 785 | if (!IS_ERR_OR_NULL(info->fwnode)) |
| 786 | fwnode_remove_software_node(info->fwnode); |
| 787 | } |
| 788 | kfree(i2c_peripherals); |
| 789 | return error; |
| 790 | } |
| 791 | |
| 792 | static int __init |
| 793 | chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop, |
| 794 | const struct chromeos_laptop *src) |
| 795 | { |
| 796 | struct acpi_peripheral *acpi_peripherals; |
| 797 | struct acpi_peripheral *acpi_dev; |
| 798 | const struct acpi_peripheral *src_dev; |
| 799 | int n_peripherals = 0; |
| 800 | int i; |
| 801 | int error; |
| 802 | |
| 803 | for (i = 0; i < src->num_acpi_peripherals; i++) { |
| 804 | if (acpi_dev_present(src->acpi_peripherals[i].hid, NULL, -1)) |
| 805 | n_peripherals++; |
| 806 | } |
| 807 | |
| 808 | if (!n_peripherals) |
| 809 | return 0; |
| 810 | |
| 811 | acpi_peripherals = kcalloc(n_peripherals, |
| 812 | sizeof(*src->acpi_peripherals), |
| 813 | GFP_KERNEL); |
| 814 | if (!acpi_peripherals) |
| 815 | return -ENOMEM; |
| 816 | |
| 817 | acpi_dev = acpi_peripherals; |
| 818 | for (i = 0; i < src->num_acpi_peripherals; i++) { |
| 819 | src_dev = &src->acpi_peripherals[i]; |
| 820 | if (!acpi_dev_present(src_dev->hid, NULL, -1)) |
| 821 | continue; |
| 822 | |
| 823 | *acpi_dev = *src_dev; |
| 824 | |
| 825 | /* We need to deep-copy properties */ |
| 826 | if (src_dev->swnode.properties) { |
| 827 | acpi_dev->swnode.properties = |
| 828 | property_entries_dup(src_dev->swnode.properties); |
| 829 | if (IS_ERR(acpi_dev->swnode.properties)) { |
| 830 | error = PTR_ERR(acpi_dev->swnode.properties); |
| 831 | goto err_out; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | acpi_dev++; |
| 836 | } |
| 837 | |
| 838 | cros_laptop->acpi_peripherals = acpi_peripherals; |
| 839 | cros_laptop->num_acpi_peripherals = n_peripherals; |
| 840 | |
| 841 | return 0; |
| 842 | |
| 843 | err_out: |
| 844 | while (--i >= 0) { |
| 845 | acpi_dev = &acpi_peripherals[i]; |
| 846 | if (!IS_ERR_OR_NULL(acpi_dev->swnode.properties)) |
| 847 | property_entries_free(acpi_dev->swnode.properties); |
| 848 | } |
| 849 | |
| 850 | kfree(acpi_peripherals); |
| 851 | return error; |
| 852 | } |
| 853 | |
| 854 | static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop) |
| 855 | { |
| 856 | const struct acpi_peripheral *acpi_dev; |
| 857 | struct i2c_peripheral *i2c_dev; |
| 858 | int i; |
| 859 | |
| 860 | for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) { |
| 861 | i2c_dev = &cros_laptop->i2c_peripherals[i]; |
| 862 | i2c_unregister_device(i2c_dev->client); |
| 863 | } |
| 864 | |
| 865 | for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) { |
| 866 | acpi_dev = &cros_laptop->acpi_peripherals[i]; |
| 867 | |
| 868 | if (acpi_dev->client) |
| 869 | device_remove_software_node(&acpi_dev->client->dev); |
| 870 | |
| 871 | property_entries_free(acpi_dev->swnode.properties); |
| 872 | } |
| 873 | |
| 874 | kfree(cros_laptop->i2c_peripherals); |
| 875 | kfree(cros_laptop->acpi_peripherals); |
| 876 | kfree(cros_laptop); |
| 877 | } |
| 878 | |
| 879 | static struct chromeos_laptop * __init |
| 880 | chromeos_laptop_prepare(const struct chromeos_laptop *src) |
| 881 | { |
| 882 | struct chromeos_laptop *cros_laptop; |
| 883 | int error; |
| 884 | |
| 885 | cros_laptop = kzalloc(sizeof(*cros_laptop), GFP_KERNEL); |
| 886 | if (!cros_laptop) |
| 887 | return ERR_PTR(-ENOMEM); |
| 888 | |
| 889 | error = chromeos_laptop_prepare_i2c_peripherals(cros_laptop, src); |
| 890 | if (!error) |
| 891 | error = chromeos_laptop_prepare_acpi_peripherals(cros_laptop, |
| 892 | src); |
| 893 | |
| 894 | if (error) { |
| 895 | chromeos_laptop_destroy(cros_laptop); |
| 896 | return ERR_PTR(error); |
| 897 | } |
| 898 | |
| 899 | return cros_laptop; |
| 900 | } |
| 901 | |
| 902 | static int __init chromeos_laptop_init(void) |
| 903 | { |
| 904 | const struct dmi_system_id *dmi_id; |
| 905 | int error; |
| 906 | |
| 907 | dmi_id = dmi_first_match(chromeos_laptop_dmi_table); |
| 908 | if (!dmi_id) { |
| 909 | pr_debug("unsupported system\n"); |
| 910 | return -ENODEV; |
| 911 | } |
| 912 | |
| 913 | pr_debug("DMI Matched %s\n", dmi_id->ident); |
| 914 | |
| 915 | cros_laptop = chromeos_laptop_prepare((void *)dmi_id->driver_data); |
| 916 | if (IS_ERR(cros_laptop)) |
| 917 | return PTR_ERR(cros_laptop); |
| 918 | |
| 919 | if (!cros_laptop->num_i2c_peripherals && |
| 920 | !cros_laptop->num_acpi_peripherals) { |
| 921 | pr_debug("no relevant devices detected\n"); |
| 922 | error = -ENODEV; |
| 923 | goto err_destroy_cros_laptop; |
| 924 | } |
| 925 | |
| 926 | error = bus_register_notifier(&i2c_bus_type, |
| 927 | &chromeos_laptop_i2c_notifier); |
| 928 | if (error) { |
| 929 | pr_err("failed to register i2c bus notifier: %d\n", |
| 930 | error); |
| 931 | goto err_destroy_cros_laptop; |
| 932 | } |
| 933 | |
| 934 | /* |
| 935 | * Scan adapters that have been registered and clients that have |
| 936 | * been created before we installed the notifier to make sure |
| 937 | * we do not miss any devices. |
| 938 | */ |
| 939 | i2c_for_each_dev(NULL, chromeos_laptop_scan_peripherals); |
| 940 | |
| 941 | return 0; |
| 942 | |
| 943 | err_destroy_cros_laptop: |
| 944 | chromeos_laptop_destroy(cros_laptop); |
| 945 | return error; |
| 946 | } |
| 947 | |
| 948 | static void __exit chromeos_laptop_exit(void) |
| 949 | { |
| 950 | bus_unregister_notifier(&i2c_bus_type, &chromeos_laptop_i2c_notifier); |
| 951 | chromeos_laptop_destroy(cros_laptop); |
| 952 | } |
| 953 | |
| 954 | module_init(chromeos_laptop_init); |
| 955 | module_exit(chromeos_laptop_exit); |
| 956 | |
| 957 | MODULE_DESCRIPTION("Chrome OS Laptop driver"); |
| 958 | MODULE_AUTHOR("Benson Leung <bleung@chromium.org>"); |
| 959 | MODULE_LICENSE("GPL"); |