aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/gpu/drm/radeon/radeon_acpi.h
blob: be4af76f213dca6c199d7a6f17830bc7c8d6a3b2 (plain) (tree)
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
445

























                                                                             





                                                   




























































































































































































































































































































































































































                                                                                     
/*
 * Copyright 2012 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#ifndef RADEON_ACPI_H
#define RADEON_ACPI_H

struct radeon_device;
struct acpi_bus_event;

int radeon_atif_handler(struct radeon_device *rdev,
		struct acpi_bus_event *event);

/* AMD hw uses four ACPI control methods:
 * 1. ATIF
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATIF provides an entry point for the gfx driver to interact with the sbios.
 * The AMD ACPI notification mechanism uses Notify (VGA, 0x81) or a custom
 * notification. Which notification is used as indicated by the ATIF Control
 * Method GET_SYSTEM_PARAMETERS. When the driver receives Notify (VGA, 0x81) or
 * a custom notification it invokes ATIF Control Method GET_SYSTEM_BIOS_REQUESTS
 * to identify pending System BIOS requests and associated parameters. For
 * example, if one of the pending requests is DISPLAY_SWITCH_REQUEST, the driver
 * will perform display device detection and invoke ATIF Control Method
 * SELECT_ACTIVE_DISPLAYS.
 *
 * 2. ATPX
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATPX methods are used on PowerXpress systems to handle mux switching and
 * discrete GPU power control.
 *
 * 3. ATRM
 * ARG0: (ACPI_INTEGER) offset of vbios rom data
 * ARG1: (ACPI_BUFFER) size of the buffer to fill (up to 4K).
 * OUTPUT: (ACPI_BUFFER) output buffer
 * ATRM provides an interfacess to access the discrete GPU vbios image on
 * PowerXpress systems with multiple GPUs.
 *
 * 4. ATCS
 * ARG0: (ACPI_INTEGER) function code
 * ARG1: (ACPI_BUFFER) parameter buffer, 256 bytes
 * OUTPUT: (ACPI_BUFFER) output buffer, 256 bytes
 * ATCS provides an interface to AMD chipset specific functionality.
 *
 */
/* ATIF */
#define ATIF_FUNCTION_VERIFY_INTERFACE                             0x0
/* ARG0: ATIF_FUNCTION_VERIFY_INTERFACE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - version
 * DWORD - supported notifications mask
 * DWORD - supported functions bit vector
 */
/* Notifications mask */
#       define ATIF_DISPLAY_SWITCH_REQUEST_SUPPORTED               (1 << 0)
#       define ATIF_EXPANSION_MODE_CHANGE_REQUEST_SUPPORTED        (1 << 1)
#       define ATIF_THERMAL_STATE_CHANGE_REQUEST_SUPPORTED         (1 << 2)
#       define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST_SUPPORTED    (1 << 3)
#       define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST_SUPPORTED   (1 << 4)
#       define ATIF_DISPLAY_CONF_CHANGE_REQUEST_SUPPORTED          (1 << 5)
#       define ATIF_PX_GFX_SWITCH_REQUEST_SUPPORTED                (1 << 6)
#       define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST_SUPPORTED      (1 << 7)
#       define ATIF_DGPU_DISPLAY_EVENT_SUPPORTED                   (1 << 8)
/* supported functions vector */
#       define ATIF_GET_SYSTEM_PARAMETERS_SUPPORTED               (1 << 0)
#       define ATIF_GET_SYSTEM_BIOS_REQUESTS_SUPPORTED            (1 << 1)
#       define ATIF_SELECT_ACTIVE_DISPLAYS_SUPPORTED              (1 << 2)
#       define ATIF_GET_LID_STATE_SUPPORTED                       (1 << 3)
#       define ATIF_GET_TV_STANDARD_FROM_CMOS_SUPPORTED           (1 << 4)
#       define ATIF_SET_TV_STANDARD_IN_CMOS_SUPPORTED             (1 << 5)
#       define ATIF_GET_PANEL_EXPANSION_MODE_FROM_CMOS_SUPPORTED  (1 << 6)
#       define ATIF_SET_PANEL_EXPANSION_MODE_IN_CMOS_SUPPORTED    (1 << 7)
#       define ATIF_TEMPERATURE_CHANGE_NOTIFICATION_SUPPORTED     (1 << 12)
#       define ATIF_GET_GRAPHICS_DEVICE_TYPES_SUPPORTED           (1 << 14)
#define ATIF_FUNCTION_GET_SYSTEM_PARAMETERS                        0x1
/* ARG0: ATIF_FUNCTION_GET_SYSTEM_PARAMETERS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags
 *
 * OR
 *
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags
 * BYTE  - notify command code
 *
 * flags
 * bits 1:0:
 * 0 - Notify(VGA, 0x81) is not used for notification
 * 1 - Notify(VGA, 0x81) is used for notification
 * 2 - Notify(VGA, n) is used for notification where
 * n (0xd0-0xd9) is specified in notify command code.
 * bit 2:
 * 1 - lid changes not reported though int10
 */
#define ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS                     0x2
/* ARG0: ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * DWORD - pending sbios requests
 * BYTE  - panel expansion mode
 * BYTE  - thermal state: target gfx controller
 * BYTE  - thermal state: state id (0: exit state, non-0: state)
 * BYTE  - forced power state: target gfx controller
 * BYTE  - forced power state: state id
 * BYTE  - system power source
 * BYTE  - panel backlight level (0-255)
 */
/* pending sbios requests */
#       define ATIF_DISPLAY_SWITCH_REQUEST                         (1 << 0)
#       define ATIF_EXPANSION_MODE_CHANGE_REQUEST                  (1 << 1)
#       define ATIF_THERMAL_STATE_CHANGE_REQUEST                   (1 << 2)
#       define ATIF_FORCED_POWER_STATE_CHANGE_REQUEST              (1 << 3)
#       define ATIF_SYSTEM_POWER_SOURCE_CHANGE_REQUEST             (1 << 4)
#       define ATIF_DISPLAY_CONF_CHANGE_REQUEST                    (1 << 5)
#       define ATIF_PX_GFX_SWITCH_REQUEST                          (1 << 6)
#       define ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST                (1 << 7)
#       define ATIF_DGPU_DISPLAY_EVENT                             (1 << 8)
/* panel expansion mode */
#       define ATIF_PANEL_EXPANSION_DISABLE                        0
#       define ATIF_PANEL_EXPANSION_FULL                           1
#       define ATIF_PANEL_EXPANSION_ASPECT                         2
/* target gfx controller */
#       define ATIF_TARGET_GFX_SINGLE                              0
#       define ATIF_TARGET_GFX_PX_IGPU                             1
#       define ATIF_TARGET_GFX_PX_DGPU                             2
/* system power source */
#       define ATIF_POWER_SOURCE_AC                                1
#       define ATIF_POWER_SOURCE_DC                                2
#       define ATIF_POWER_SOURCE_RESTRICTED_AC_1                   3
#       define ATIF_POWER_SOURCE_RESTRICTED_AC_2                   4
#define ATIF_FUNCTION_SELECT_ACTIVE_DISPLAYS                       0x3
/* ARG0: ATIF_FUNCTION_SELECT_ACTIVE_DISPLAYS
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - selected displays
 * WORD  - connected displays
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - selected displays
 */
#       define ATIF_LCD1                                           (1 << 0)
#       define ATIF_CRT1                                           (1 << 1)
#       define ATIF_TV                                             (1 << 2)
#       define ATIF_DFP1                                           (1 << 3)
#       define ATIF_CRT2                                           (1 << 4)
#       define ATIF_LCD2                                           (1 << 5)
#       define ATIF_DFP2                                           (1 << 7)
#       define ATIF_CV                                             (1 << 8)
#       define ATIF_DFP3                                           (1 << 9)
#       define ATIF_DFP4                                           (1 << 10)
#       define ATIF_DFP5                                           (1 << 11)
#       define ATIF_DFP6                                           (1 << 12)
#define ATIF_FUNCTION_GET_LID_STATE                                0x4
/* ARG0: ATIF_FUNCTION_GET_LID_STATE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - lid state (0: open, 1: closed)
 *
 * GET_LID_STATE only works at boot and resume, for general lid
 * status, use the kernel provided status
 */
#define ATIF_FUNCTION_GET_TV_STANDARD_FROM_CMOS                    0x5
/* ARG0: ATIF_FUNCTION_GET_TV_STANDARD_FROM_CMOS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - 0
 * BYTE  - TV standard
 */
#       define ATIF_TV_STD_NTSC                                    0
#       define ATIF_TV_STD_PAL                                     1
#       define ATIF_TV_STD_PALM                                    2
#       define ATIF_TV_STD_PAL60                                   3
#       define ATIF_TV_STD_NTSCJ                                   4
#       define ATIF_TV_STD_PALCN                                   5
#       define ATIF_TV_STD_PALN                                    6
#       define ATIF_TV_STD_SCART_RGB                               9
#define ATIF_FUNCTION_SET_TV_STANDARD_IN_CMOS                      0x6
/* ARG0: ATIF_FUNCTION_SET_TV_STANDARD_IN_CMOS
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - 0
 * BYTE  - TV standard
 * OUTPUT: none
 */
#define ATIF_FUNCTION_GET_PANEL_EXPANSION_MODE_FROM_CMOS           0x7
/* ARG0: ATIF_FUNCTION_GET_PANEL_EXPANSION_MODE_FROM_CMOS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - panel expansion mode
 */
#define ATIF_FUNCTION_SET_PANEL_EXPANSION_MODE_IN_CMOS             0x8
/* ARG0: ATIF_FUNCTION_SET_PANEL_EXPANSION_MODE_IN_CMOS
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - panel expansion mode
 * OUTPUT: none
 */
#define ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION              0xD
/* ARG0: ATIF_FUNCTION_TEMPERATURE_CHANGE_NOTIFICATION
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - gfx controller id
 * BYTE  - current temperature (degress Celsius)
 * OUTPUT: none
 */
#define ATIF_FUNCTION_GET_GRAPHICS_DEVICE_TYPES                    0xF
/* ARG0: ATIF_FUNCTION_GET_GRAPHICS_DEVICE_TYPES
 * ARG1: none
 * OUTPUT:
 * WORD  - number of gfx devices
 * WORD  - device structure size in bytes (excludes device size field)
 * DWORD - flags         \
 * WORD  - bus number     } repeated structure
 * WORD  - device number /
 */
/* flags */
#       define ATIF_PX_REMOVABLE_GRAPHICS_DEVICE                   (1 << 0)
#       define ATIF_XGP_PORT                                       (1 << 1)
#       define ATIF_VGA_ENABLED_GRAPHICS_DEVICE                    (1 << 2)
#       define ATIF_XGP_PORT_IN_DOCK                               (1 << 3)

/* ATPX */
#define ATPX_FUNCTION_VERIFY_INTERFACE                             0x0
/* ARG0: ATPX_FUNCTION_VERIFY_INTERFACE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - version
 * DWORD - supported functions bit vector
 */
/* supported functions vector */
#       define ATPX_GET_PX_PARAMETERS_SUPPORTED                    (1 << 0)
#       define ATPX_POWER_CONTROL_SUPPORTED                        (1 << 1)
#       define ATPX_DISPLAY_MUX_CONTROL_SUPPORTED                  (1 << 2)
#       define ATPX_I2C_MUX_CONTROL_SUPPORTED                      (1 << 3)
#       define ATPX_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION_SUPPORTED (1 << 4)
#       define ATPX_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION_SUPPORTED   (1 << 5)
#       define ATPX_GET_DISPLAY_CONNECTORS_MAPPING_SUPPORTED       (1 << 7)
#       define ATPX_GET_DISPLAY_DETECTION_PORTS_SUPPORTED          (1 << 8)
#define ATPX_FUNCTION_GET_PX_PARAMETERS                            0x1
/* ARG0: ATPX_FUNCTION_GET_PX_PARAMETERS
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags
 */
/* flags */
#       define ATPX_LVDS_I2C_AVAILABLE_TO_BOTH_GPUS                (1 << 0)
#       define ATPX_CRT1_I2C_AVAILABLE_TO_BOTH_GPUS                (1 << 1)
#       define ATPX_DVI1_I2C_AVAILABLE_TO_BOTH_GPUS                (1 << 2)
#       define ATPX_CRT1_RGB_SIGNAL_MUXED                          (1 << 3)
#       define ATPX_TV_SIGNAL_MUXED                                (1 << 4)
#       define ATPX_DFP_SIGNAL_MUXED                               (1 << 5)
#       define ATPX_SEPARATE_MUX_FOR_I2C                           (1 << 6)
#       define ATPX_DYNAMIC_PX_SUPPORTED                           (1 << 7)
#       define ATPX_ACF_NOT_SUPPORTED                              (1 << 8)
#       define ATPX_FIXED_NOT_SUPPORTED                            (1 << 9)
#       define ATPX_DYNAMIC_DGPU_POWER_OFF_SUPPORTED               (1 << 10)
#       define ATPX_DGPU_REQ_POWER_FOR_DISPLAYS                    (1 << 11)
#define ATPX_FUNCTION_POWER_CONTROL                                0x2
/* ARG0: ATPX_FUNCTION_POWER_CONTROL
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - dGPU power state (0: power off, 1: power on)
 * OUTPUT: none
 */
#define ATPX_FUNCTION_DISPLAY_MUX_CONTROL                          0x3
/* ARG0: ATPX_FUNCTION_DISPLAY_MUX_CONTROL
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - display mux control (0: iGPU, 1: dGPU)
 * OUTPUT: none
 */
#       define ATPX_INTEGRATED_GPU                                 0
#       define ATPX_DISCRETE_GPU                                   1
#define ATPX_FUNCTION_I2C_MUX_CONTROL                              0x4
/* ARG0: ATPX_FUNCTION_I2C_MUX_CONTROL
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - i2c/aux/hpd mux control (0: iGPU, 1: dGPU)
 * OUTPUT: none
 */
#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION    0x5
/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_START_NOTIFICATION
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - target gpu (0: iGPU, 1: dGPU)
 * OUTPUT: none
 */
#define ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION      0x6
/* ARG0: ATPX_FUNCTION_GRAPHICS_DEVICE_SWITCH_END_NOTIFICATION
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - target gpu (0: iGPU, 1: dGPU)
 * OUTPUT: none
 */
#define ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING               0x8
/* ARG0: ATPX_FUNCTION_GET_DISPLAY_CONNECTORS_MAPPING
 * ARG1: none
 * OUTPUT:
 * WORD  - number of display connectors
 * WORD  - connector structure size in bytes (excludes connector size field)
 * BYTE  - flags                                                     \
 * BYTE  - ATIF display vector bit position                           } repeated
 * BYTE  - adapter id (0: iGPU, 1-n: dGPU ordered by pcie bus number) } structure
 * WORD  - connector ACPI id                                         /
 */
/* flags */
#       define ATPX_DISPLAY_OUTPUT_SUPPORTED_BY_ADAPTER_ID_DEVICE  (1 << 0)
#       define ATPX_DISPLAY_HPD_SUPPORTED_BY_ADAPTER_ID_DEVICE     (1 << 1)
#       define ATPX_DISPLAY_I2C_SUPPORTED_BY_ADAPTER_ID_DEVICE     (1 << 2)
#define ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS                  0x9
/* ARG0: ATPX_FUNCTION_GET_DISPLAY_DETECTION_PORTS
 * ARG1: none
 * OUTPUT:
 * WORD  - number of HPD/DDC ports
 * WORD  - port structure size in bytes (excludes port size field)
 * BYTE  - ATIF display vector bit position \
 * BYTE  - hpd id                            } reapeated structure
 * BYTE  - ddc id                           /
 *
 * available on A+A systems only
 */
/* hpd id */
#       define ATPX_HPD_NONE                                       0
#       define ATPX_HPD1                                           1
#       define ATPX_HPD2                                           2
#       define ATPX_HPD3                                           3
#       define ATPX_HPD4                                           4
#       define ATPX_HPD5                                           5
#       define ATPX_HPD6                                           6
/* ddc id */
#       define ATPX_DDC_NONE                                       0
#       define ATPX_DDC1                                           1
#       define ATPX_DDC2                                           2
#       define ATPX_DDC3                                           3
#       define ATPX_DDC4                                           4
#       define ATPX_DDC5                                           5
#       define ATPX_DDC6                                           6
#       define ATPX_DDC7                                           7
#       define ATPX_DDC8                                           8

/* ATCS */
#define ATCS_FUNCTION_VERIFY_INTERFACE                             0x0
/* ARG0: ATCS_FUNCTION_VERIFY_INTERFACE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - version
 * DWORD - supported functions bit vector
 */
/* supported functions vector */
#       define ATCS_GET_EXTERNAL_STATE_SUPPORTED                   (1 << 0)
#       define ATCS_PCIE_PERFORMANCE_REQUEST_SUPPORTED             (1 << 1)
#       define ATCS_PCIE_DEVICE_READY_NOTIFICATION_SUPPORTED       (1 << 2)
#       define ATCS_SET_PCIE_BUS_WIDTH_SUPPORTED                   (1 << 3)
#define ATCS_FUNCTION_GET_EXTERNAL_STATE                           0x1
/* ARG0: ATCS_FUNCTION_GET_EXTERNAL_STATE
 * ARG1: none
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * DWORD - valid flags mask
 * DWORD - flags (0: undocked, 1: docked)
 */
/* flags */
#       define ATCS_DOCKED                                         (1 << 0)
#define ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST                     0x2
/* ARG0: ATCS_FUNCTION_PCIE_PERFORMANCE_REQUEST
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
 * WORD  - valid flags mask
 * WORD  - flags
 * BYTE  - request type
 * BYTE  - performance request
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - return value
 */
/* flags */
#       define ATCS_ADVERTISE_CAPS                                 (1 << 0)
#       define ATCS_WAIT_FOR_COMPLETION                            (1 << 1)
/* request type */
#       define ATCS_PCIE_LINK_SPEED                                1
/* performance request */
#       define ATCS_REMOVE                                         0
#       define ATCS_FORCE_LOW_POWER                                1
#       define ATCS_PERF_LEVEL_1                                   2 /* PCIE Gen 1 */
#       define ATCS_PERF_LEVEL_2                                   3 /* PCIE Gen 2 */
#       define ATCS_PERF_LEVEL_3                                   4 /* PCIE Gen 3 */
/* return value */
#       define ATCS_REQUEST_REFUSED                                1
#       define ATCS_REQUEST_COMPLETE                               2
#       define ATCS_REQUEST_IN_PROGRESS                            3
#define ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION               0x3
/* ARG0: ATCS_FUNCTION_PCIE_DEVICE_READY_NOTIFICATION
 * ARG1: none
 * OUTPUT: none
 */
#define ATCS_FUNCTION_SET_PCIE_BUS_WIDTH                           0x4
/* ARG0: ATCS_FUNCTION_SET_PCIE_BUS_WIDTH
 * ARG1:
 * WORD  - structure size in bytes (includes size field)
 * WORD  - client id (bit 2-0: func num, 7-3: dev num, 15-8: bus num)
 * BYTE  - number of active lanes
 * OUTPUT:
 * WORD  - structure size in bytes (includes size field)
 * BYTE  - number of active lanes
 */

#endif