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:00:00:01:11:00",
.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,
&ssam_node_pos_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,
};
/* -- 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");
|
