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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 | // SPDX-License-Identifier: GPL-2.0+ /* * Surface System Aggregator Module (SSAM) client device registry. * * Registry for non-platform/non-ACPI SSAM client devices, i.e. devices that * cannot be auto-detected. Provides device-hubs and performs instantiation * for these devices. * * Copyright (C) 2020-2022 Maximilian Luz <luzmaximilian@gmail.com> */ #include <linux/acpi.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/property.h> #include <linux/types.h> #include <linux/surface_aggregator/device.h> /* -- Device registry. ------------------------------------------------------ */ /* * SSAM device names follow the SSAM module alias, meaning they are prefixed * with 'ssam:', followed by domain, category, target ID, instance ID, and * function, each encoded as two-digit hexadecimal, separated by ':'. In other * words, it follows the scheme * * ssam:dd:cc:tt:ii:ff * * Where, 'dd', 'cc', 'tt', 'ii', and 'ff' are the two-digit hexadecimal * values mentioned above, respectively. */ /* Root node. */ static const struct software_node ssam_node_root = { .name = "ssam_platform_hub", }; /* KIP device hub (connects keyboard cover devices on Surface Pro 8). */ static const struct software_node ssam_node_hub_kip = { .name = "ssam:00:00:01:0e:00", .parent = &ssam_node_root, }; /* Base device hub (devices attached to Surface Book 3 base). */ static const struct software_node ssam_node_hub_base = { .name = "ssam:00:00:02:11:00", .parent = &ssam_node_root, }; /* AC adapter. */ static const struct software_node ssam_node_bat_ac = { .name = "ssam:01:02:01:01:01", .parent = &ssam_node_root, }; /* Primary battery. */ static const struct software_node ssam_node_bat_main = { .name = "ssam:01:02:01:01:00", .parent = &ssam_node_root, }; /* Secondary battery (Surface Book 3). */ static const struct software_node ssam_node_bat_sb3base = { .name = "ssam:01:02:02:01:00", .parent = &ssam_node_hub_base, }; /* Platform profile / performance-mode device. */ static const struct software_node ssam_node_tmp_pprof = { .name = "ssam:01:03:01:00:01", .parent = &ssam_node_root, }; /* Tablet-mode switch via KIP subsystem. */ static const struct software_node ssam_node_kip_tablet_switch = { .name = "ssam:01:0e:01:00:01", .parent = &ssam_node_root, }; /* DTX / detachment-system device (Surface Book 3). */ static const struct software_node ssam_node_bas_dtx = { .name = "ssam:01:11:01:00:00", .parent = &ssam_node_root, }; /* HID keyboard (SAM, TID=1). */ static const struct software_node ssam_node_hid_sam_keyboard = { .name = "ssam:01:15:01:01:00", .parent = &ssam_node_root, }; /* HID pen stash (SAM, TID=1; pen taken / stashed away evens). */ static const struct software_node ssam_node_hid_sam_penstash = { .name = "ssam:01:15:01:02:00", .parent = &ssam_node_root, }; /* HID touchpad (SAM, TID=1). */ static const struct software_node ssam_node_hid_sam_touchpad = { .name = "ssam:01:15:01:03:00", .parent = &ssam_node_root, }; /* HID device instance 6 (SAM, TID=1, HID sensor collection). */ static const struct software_node ssam_node_hid_sam_sensors = { .name = "ssam:01:15:01:06:00", .parent = &ssam_node_root, }; /* HID device instance 7 (SAM, TID=1, UCM UCSI HID client). */ static const struct software_node ssam_node_hid_sam_ucm_ucsi = { .name = "ssam:01:15:01:07:00", .parent = &ssam_node_root, }; /* HID system controls (SAM, TID=1). */ static const struct software_node ssam_node_hid_sam_sysctrl = { .name = "ssam:01:15:01:08:00", .parent = &ssam_node_root, }; /* HID keyboard. */ static const struct software_node ssam_node_hid_main_keyboard = { .name = "ssam:01:15:02:01:00", .parent = &ssam_node_root, }; /* HID touchpad. */ static const struct software_node ssam_node_hid_main_touchpad = { .name = "ssam:01:15:02:03:00", .parent = &ssam_node_root, }; /* HID device instance 5 (unknown HID device). */ static const struct software_node ssam_node_hid_main_iid5 = { .name = "ssam:01:15:02:05:00", .parent = &ssam_node_root, }; /* HID keyboard (base hub). */ static const struct software_node ssam_node_hid_base_keyboard = { .name = "ssam:01:15:02:01:00", .parent = &ssam_node_hub_base, }; /* HID touchpad (base hub). */ static const struct software_node ssam_node_hid_base_touchpad = { .name = "ssam:01:15:02:03:00", .parent = &ssam_node_hub_base, }; /* HID device instance 5 (unknown HID device, base hub). */ static const struct software_node ssam_node_hid_base_iid5 = { .name = "ssam:01:15:02:05:00", .parent = &ssam_node_hub_base, }; /* HID device instance 6 (unknown HID device, base hub). */ static const struct software_node ssam_node_hid_base_iid6 = { .name = "ssam:01:15:02:06:00", .parent = &ssam_node_hub_base, }; /* HID keyboard (KIP hub). */ static const struct software_node ssam_node_hid_kip_keyboard = { .name = "ssam:01:15:02:01:00", .parent = &ssam_node_hub_kip, }; /* HID pen stash (KIP hub; pen taken / stashed away evens). */ static const struct software_node ssam_node_hid_kip_penstash = { .name = "ssam:01:15:02:02:00", .parent = &ssam_node_hub_kip, }; /* HID touchpad (KIP hub). */ static const struct software_node ssam_node_hid_kip_touchpad = { .name = "ssam:01:15:02:03:00", .parent = &ssam_node_hub_kip, }; /* HID device instance 5 (KIP hub, type-cover firmware update). */ static const struct software_node ssam_node_hid_kip_fwupd = { .name = "ssam:01:15:02:05:00", .parent = &ssam_node_hub_kip, }; /* Tablet-mode switch via POS subsystem. */ static const struct software_node ssam_node_pos_tablet_switch = { .name = "ssam:01:26:01:00:01", .parent = &ssam_node_root, }; /* * Devices for 5th- and 6th-generations models: * - Surface Book 2, * - Surface Laptop 1 and 2, * - Surface Pro 5 and 6. */ static const struct software_node *ssam_node_group_gen5[] = { &ssam_node_root, &ssam_node_tmp_pprof, NULL, }; /* Devices for Surface Book 3. */ static const struct software_node *ssam_node_group_sb3[] = { &ssam_node_root, &ssam_node_hub_base, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_bat_sb3base, &ssam_node_tmp_pprof, &ssam_node_bas_dtx, &ssam_node_hid_base_keyboard, &ssam_node_hid_base_touchpad, &ssam_node_hid_base_iid5, &ssam_node_hid_base_iid6, NULL, }; /* Devices for Surface Laptop 3 and 4. */ static const struct software_node *ssam_node_group_sl3[] = { &ssam_node_root, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, &ssam_node_hid_main_keyboard, &ssam_node_hid_main_touchpad, &ssam_node_hid_main_iid5, NULL, }; /* Devices for Surface Laptop 5. */ static const struct software_node *ssam_node_group_sl5[] = { &ssam_node_root, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, &ssam_node_hid_main_keyboard, &ssam_node_hid_main_touchpad, &ssam_node_hid_main_iid5, &ssam_node_hid_sam_ucm_ucsi, NULL, }; /* Devices for Surface Laptop Studio. */ static const struct software_node *ssam_node_group_sls[] = { &ssam_node_root, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, &ssam_node_pos_tablet_switch, &ssam_node_hid_sam_keyboard, &ssam_node_hid_sam_penstash, &ssam_node_hid_sam_touchpad, &ssam_node_hid_sam_sensors, &ssam_node_hid_sam_ucm_ucsi, &ssam_node_hid_sam_sysctrl, NULL, }; /* Devices for Surface Laptop Go. */ static const struct software_node *ssam_node_group_slg1[] = { &ssam_node_root, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, NULL, }; /* Devices for Surface Pro 7 and Surface Pro 7+. */ static const struct software_node *ssam_node_group_sp7[] = { &ssam_node_root, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, NULL, }; /* Devices for Surface Pro 8 */ static const struct software_node *ssam_node_group_sp8[] = { &ssam_node_root, &ssam_node_hub_kip, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, &ssam_node_kip_tablet_switch, &ssam_node_hid_kip_keyboard, &ssam_node_hid_kip_penstash, &ssam_node_hid_kip_touchpad, &ssam_node_hid_kip_fwupd, &ssam_node_hid_sam_sensors, &ssam_node_hid_sam_ucm_ucsi, NULL, }; /* Devices for Surface Pro 9 */ static const struct software_node *ssam_node_group_sp9[] = { &ssam_node_root, &ssam_node_hub_kip, &ssam_node_bat_ac, &ssam_node_bat_main, &ssam_node_tmp_pprof, /* TODO: Tablet mode switch (via POS subsystem) */ &ssam_node_hid_kip_keyboard, &ssam_node_hid_kip_penstash, &ssam_node_hid_kip_touchpad, &ssam_node_hid_kip_fwupd, &ssam_node_hid_sam_sensors, &ssam_node_hid_sam_ucm_ucsi, NULL, }; /* -- SSAM platform/meta-hub driver. ---------------------------------------- */ static const struct acpi_device_id ssam_platform_hub_match[] = { /* Surface Pro 4, 5, and 6 (OMBR < 0x10) */ { "MSHW0081", (unsigned long)ssam_node_group_gen5 }, /* Surface Pro 6 (OMBR >= 0x10) */ { "MSHW0111", (unsigned long)ssam_node_group_gen5 }, /* Surface Pro 7 */ { "MSHW0116", (unsigned long)ssam_node_group_sp7 }, /* Surface Pro 7+ */ { "MSHW0119", (unsigned long)ssam_node_group_sp7 }, /* Surface Pro 8 */ { "MSHW0263", (unsigned long)ssam_node_group_sp8 }, /* Surface Pro 9 */ { "MSHW0343", (unsigned long)ssam_node_group_sp9 }, /* Surface Book 2 */ { "MSHW0107", (unsigned long)ssam_node_group_gen5 }, /* Surface Book 3 */ { "MSHW0117", (unsigned long)ssam_node_group_sb3 }, /* Surface Laptop 1 */ { "MSHW0086", (unsigned long)ssam_node_group_gen5 }, /* Surface Laptop 2 */ { "MSHW0112", (unsigned long)ssam_node_group_gen5 }, /* Surface Laptop 3 (13", Intel) */ { "MSHW0114", (unsigned long)ssam_node_group_sl3 }, /* Surface Laptop 3 (15", AMD) and 4 (15", AMD) */ { "MSHW0110", (unsigned long)ssam_node_group_sl3 }, /* Surface Laptop 4 (13", Intel) */ { "MSHW0250", (unsigned long)ssam_node_group_sl3 }, /* Surface Laptop 5 */ { "MSHW0350", (unsigned long)ssam_node_group_sl5 }, /* Surface Laptop Go 1 */ { "MSHW0118", (unsigned long)ssam_node_group_slg1 }, /* Surface Laptop Go 2 */ { "MSHW0290", (unsigned long)ssam_node_group_slg1 }, /* Surface Laptop Studio */ { "MSHW0123", (unsigned long)ssam_node_group_sls }, { }, }; MODULE_DEVICE_TABLE(acpi, ssam_platform_hub_match); static int ssam_platform_hub_probe(struct platform_device *pdev) { const struct software_node **nodes; struct ssam_controller *ctrl; struct fwnode_handle *root; int status; nodes = (const struct software_node **)acpi_device_get_match_data(&pdev->dev); if (!nodes) return -ENODEV; /* * As we're adding the SSAM client devices as children under this device * and not the SSAM controller, we need to add a device link to the * controller to ensure that we remove all of our devices before the * controller is removed. This also guarantees proper ordering for * suspend/resume of the devices on this hub. */ ctrl = ssam_client_bind(&pdev->dev); if (IS_ERR(ctrl)) return PTR_ERR(ctrl) == -ENODEV ? -EPROBE_DEFER : PTR_ERR(ctrl); status = software_node_register_node_group(nodes); if (status) return status; root = software_node_fwnode(&ssam_node_root); if (!root) { software_node_unregister_node_group(nodes); return -ENOENT; } set_secondary_fwnode(&pdev->dev, root); status = __ssam_register_clients(&pdev->dev, ctrl, root); if (status) { set_secondary_fwnode(&pdev->dev, NULL); software_node_unregister_node_group(nodes); } platform_set_drvdata(pdev, nodes); return status; } static int ssam_platform_hub_remove(struct platform_device *pdev) { const struct software_node **nodes = platform_get_drvdata(pdev); ssam_remove_clients(&pdev->dev); set_secondary_fwnode(&pdev->dev, NULL); software_node_unregister_node_group(nodes); return 0; } static struct platform_driver ssam_platform_hub_driver = { .probe = ssam_platform_hub_probe, .remove = ssam_platform_hub_remove, .driver = { .name = "surface_aggregator_platform_hub", .acpi_match_table = ssam_platform_hub_match, .probe_type = PROBE_PREFER_ASYNCHRONOUS, }, }; module_platform_driver(ssam_platform_hub_driver); MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>"); MODULE_DESCRIPTION("Device-registry for Surface System Aggregator Module"); MODULE_LICENSE("GPL"); |