1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * f_uac2.c -- USB Audio Class 2.0 Function 4 * 5 * Copyright (C) 2011 6 * Yadwinder Singh (yadi.brar01@gmail.com) 7 * Jaswinder Singh (jaswinder.singh@linaro.org) 8 * 9 * Copyright (C) 2020 10 * Ruslan Bilovol (ruslan.bilovol@gmail.com) 11 */ 12 13 #include <linux/usb/audio.h> 14 #include <linux/usb/audio-v2.h> 15 #include <linux/module.h> 16 17 #include "u_audio.h" 18 19 #include "u_uac2.h" 20 21 /* UAC2 spec: 4.1 Audio Channel Cluster Descriptor */ 22 #define UAC2_CHANNEL_MASK 0x07FFFFFF 23 24 /* 25 * The driver implements a simple UAC_2 topology. 26 * USB-OUT -> IT_1 -> FU -> OT_3 -> ALSA_Capture 27 * ALSA_Playback -> IT_2 -> FU -> OT_4 -> USB-IN 28 * Capture and Playback sampling rates are independently 29 * controlled by two clock sources : 30 * CLK_5 := c_srate, and CLK_6 := p_srate 31 */ 32 #define USB_OUT_CLK_ID (out_clk_src_desc.bClockID) 33 #define USB_IN_CLK_ID (in_clk_src_desc.bClockID) 34 #define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID) 35 #define USB_IN_FU_ID (in_feature_unit_desc->bUnitID) 36 37 #define CONTROL_ABSENT 0 38 #define CONTROL_RDONLY 1 39 #define CONTROL_RDWR 3 40 41 #define CLK_FREQ_CTRL 0 42 #define CLK_VLD_CTRL 2 43 #define FU_MUTE_CTRL 0 44 #define FU_VOL_CTRL 2 45 46 #define COPY_CTRL 0 47 #define CONN_CTRL 2 48 #define OVRLD_CTRL 4 49 #define CLSTR_CTRL 6 50 #define UNFLW_CTRL 8 51 #define OVFLW_CTRL 10 52 53 #define EPIN_EN(_opts) ((_opts)->p_chmask != 0) 54 #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0) 55 #define FUIN_EN(_opts) (EPIN_EN(_opts) \ 56 && ((_opts)->p_mute_present \ 57 || (_opts)->p_volume_present)) 58 #define FUOUT_EN(_opts) (EPOUT_EN(_opts) \ 59 && ((_opts)->c_mute_present \ 60 || (_opts)->c_volume_present)) 61 #define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC) 62 63 struct f_uac2 { 64 struct g_audio g_audio; 65 u8 ac_intf, as_in_intf, as_out_intf; 66 u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */ 67 68 struct usb_ctrlrequest setup_cr; /* will be used in data stage */ 69 70 /* Interrupt IN endpoint of AC interface */ 71 struct usb_ep *int_ep; 72 atomic_t int_count; 73 /* transient state, only valid during handling of a single control request */ 74 int clock_id; 75 }; 76 77 static inline struct f_uac2 *func_to_uac2(struct usb_function *f) 78 { 79 return container_of(f, struct f_uac2, g_audio.func); 80 } 81 82 static inline 83 struct f_uac2_opts *g_audio_to_uac2_opts(struct g_audio *agdev) 84 { 85 return container_of(agdev->func.fi, struct f_uac2_opts, func_inst); 86 } 87 88 static int afunc_notify(struct g_audio *agdev, int unit_id, int cs); 89 90 /* --------- USB Function Interface ------------- */ 91 92 enum { 93 STR_ASSOC, 94 STR_IF_CTRL, 95 STR_CLKSRC_IN, 96 STR_CLKSRC_OUT, 97 STR_USB_IT, 98 STR_IO_IT, 99 STR_USB_OT, 100 STR_IO_OT, 101 STR_FU_IN, 102 STR_FU_OUT, 103 STR_AS_OUT_ALT0, 104 STR_AS_OUT_ALT1, 105 STR_AS_IN_ALT0, 106 STR_AS_IN_ALT1, 107 }; 108 109 static struct usb_string strings_fn[] = { 110 /* [STR_ASSOC].s = DYNAMIC, */ 111 [STR_IF_CTRL].s = "Topology Control", 112 [STR_CLKSRC_IN].s = "Input Clock", 113 [STR_CLKSRC_OUT].s = "Output Clock", 114 [STR_USB_IT].s = "USBH Out", 115 [STR_IO_IT].s = "USBD Out", 116 [STR_USB_OT].s = "USBH In", 117 [STR_IO_OT].s = "USBD In", 118 [STR_FU_IN].s = "Capture Volume", 119 [STR_FU_OUT].s = "Playback Volume", 120 [STR_AS_OUT_ALT0].s = "Playback Inactive", 121 [STR_AS_OUT_ALT1].s = "Playback Active", 122 [STR_AS_IN_ALT0].s = "Capture Inactive", 123 [STR_AS_IN_ALT1].s = "Capture Active", 124 { }, 125 }; 126 127 static const char *const speed_names[] = { 128 [USB_SPEED_UNKNOWN] = "UNKNOWN", 129 [USB_SPEED_LOW] = "LS", 130 [USB_SPEED_FULL] = "FS", 131 [USB_SPEED_HIGH] = "HS", 132 [USB_SPEED_WIRELESS] = "W", 133 [USB_SPEED_SUPER] = "SS", 134 [USB_SPEED_SUPER_PLUS] = "SS+", 135 }; 136 137 static struct usb_gadget_strings str_fn = { 138 .language = 0x0409, /* en-us */ 139 .strings = strings_fn, 140 }; 141 142 static struct usb_gadget_strings *fn_strings[] = { 143 &str_fn, 144 NULL, 145 }; 146 147 static struct usb_interface_assoc_descriptor iad_desc = { 148 .bLength = sizeof iad_desc, 149 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, 150 151 .bFirstInterface = 0, 152 .bInterfaceCount = 3, 153 .bFunctionClass = USB_CLASS_AUDIO, 154 .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED, 155 .bFunctionProtocol = UAC_VERSION_2, 156 }; 157 158 /* Audio Control Interface */ 159 static struct usb_interface_descriptor std_ac_if_desc = { 160 .bLength = sizeof std_ac_if_desc, 161 .bDescriptorType = USB_DT_INTERFACE, 162 163 .bAlternateSetting = 0, 164 /* .bNumEndpoints = DYNAMIC */ 165 .bInterfaceClass = USB_CLASS_AUDIO, 166 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, 167 .bInterfaceProtocol = UAC_VERSION_2, 168 }; 169 170 /* Clock source for IN traffic */ 171 static struct uac_clock_source_descriptor in_clk_src_desc = { 172 .bLength = sizeof in_clk_src_desc, 173 .bDescriptorType = USB_DT_CS_INTERFACE, 174 175 .bDescriptorSubtype = UAC2_CLOCK_SOURCE, 176 /* .bClockID = DYNAMIC */ 177 .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, 178 .bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL), 179 .bAssocTerminal = 0, 180 }; 181 182 /* Clock source for OUT traffic */ 183 static struct uac_clock_source_descriptor out_clk_src_desc = { 184 .bLength = sizeof out_clk_src_desc, 185 .bDescriptorType = USB_DT_CS_INTERFACE, 186 187 .bDescriptorSubtype = UAC2_CLOCK_SOURCE, 188 /* .bClockID = DYNAMIC */ 189 .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, 190 .bmControls = (CONTROL_RDWR << CLK_FREQ_CTRL), 191 .bAssocTerminal = 0, 192 }; 193 194 /* Input Terminal for USB_OUT */ 195 static struct uac2_input_terminal_descriptor usb_out_it_desc = { 196 .bLength = sizeof usb_out_it_desc, 197 .bDescriptorType = USB_DT_CS_INTERFACE, 198 199 .bDescriptorSubtype = UAC_INPUT_TERMINAL, 200 /* .bTerminalID = DYNAMIC */ 201 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), 202 .bAssocTerminal = 0, 203 /* .bCSourceID = DYNAMIC */ 204 .iChannelNames = 0, 205 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 206 }; 207 208 /* Input Terminal for I/O-In */ 209 static struct uac2_input_terminal_descriptor io_in_it_desc = { 210 .bLength = sizeof io_in_it_desc, 211 .bDescriptorType = USB_DT_CS_INTERFACE, 212 213 .bDescriptorSubtype = UAC_INPUT_TERMINAL, 214 /* .bTerminalID = DYNAMIC */ 215 .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_MICROPHONE), 216 .bAssocTerminal = 0, 217 /* .bCSourceID = DYNAMIC */ 218 .iChannelNames = 0, 219 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 220 }; 221 222 /* Ouput Terminal for USB_IN */ 223 static struct uac2_output_terminal_descriptor usb_in_ot_desc = { 224 .bLength = sizeof usb_in_ot_desc, 225 .bDescriptorType = USB_DT_CS_INTERFACE, 226 227 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, 228 /* .bTerminalID = DYNAMIC */ 229 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), 230 .bAssocTerminal = 0, 231 /* .bSourceID = DYNAMIC */ 232 /* .bCSourceID = DYNAMIC */ 233 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 234 }; 235 236 /* Ouput Terminal for I/O-Out */ 237 static struct uac2_output_terminal_descriptor io_out_ot_desc = { 238 .bLength = sizeof io_out_ot_desc, 239 .bDescriptorType = USB_DT_CS_INTERFACE, 240 241 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, 242 /* .bTerminalID = DYNAMIC */ 243 .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_SPEAKER), 244 .bAssocTerminal = 0, 245 /* .bSourceID = DYNAMIC */ 246 /* .bCSourceID = DYNAMIC */ 247 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 248 }; 249 250 static struct uac2_feature_unit_descriptor *in_feature_unit_desc; 251 static struct uac2_feature_unit_descriptor *out_feature_unit_desc; 252 253 static struct uac2_ac_header_descriptor ac_hdr_desc = { 254 .bLength = sizeof ac_hdr_desc, 255 .bDescriptorType = USB_DT_CS_INTERFACE, 256 257 .bDescriptorSubtype = UAC_MS_HEADER, 258 .bcdADC = cpu_to_le16(0x200), 259 .bCategory = UAC2_FUNCTION_IO_BOX, 260 /* .wTotalLength = DYNAMIC */ 261 .bmControls = 0, 262 }; 263 264 /* AC IN Interrupt Endpoint */ 265 static struct usb_endpoint_descriptor fs_ep_int_desc = { 266 .bLength = USB_DT_ENDPOINT_SIZE, 267 .bDescriptorType = USB_DT_ENDPOINT, 268 269 .bEndpointAddress = USB_DIR_IN, 270 .bmAttributes = USB_ENDPOINT_XFER_INT, 271 .wMaxPacketSize = cpu_to_le16(6), 272 .bInterval = 1, 273 }; 274 275 static struct usb_endpoint_descriptor hs_ep_int_desc = { 276 .bLength = USB_DT_ENDPOINT_SIZE, 277 .bDescriptorType = USB_DT_ENDPOINT, 278 279 .bmAttributes = USB_ENDPOINT_XFER_INT, 280 .wMaxPacketSize = cpu_to_le16(6), 281 .bInterval = 4, 282 }; 283 284 static struct usb_endpoint_descriptor ss_ep_int_desc = { 285 .bLength = USB_DT_ENDPOINT_SIZE, 286 .bDescriptorType = USB_DT_ENDPOINT, 287 288 .bEndpointAddress = USB_DIR_IN, 289 .bmAttributes = USB_ENDPOINT_XFER_INT, 290 .wMaxPacketSize = cpu_to_le16(6), 291 .bInterval = 4, 292 }; 293 294 static struct usb_ss_ep_comp_descriptor ss_ep_int_desc_comp = { 295 .bLength = sizeof(ss_ep_int_desc_comp), 296 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 297 .wBytesPerInterval = cpu_to_le16(6), 298 }; 299 300 /* Audio Streaming OUT Interface - Alt0 */ 301 static struct usb_interface_descriptor std_as_out_if0_desc = { 302 .bLength = sizeof std_as_out_if0_desc, 303 .bDescriptorType = USB_DT_INTERFACE, 304 305 .bAlternateSetting = 0, 306 .bNumEndpoints = 0, 307 .bInterfaceClass = USB_CLASS_AUDIO, 308 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 309 .bInterfaceProtocol = UAC_VERSION_2, 310 }; 311 312 /* Audio Streaming OUT Interface - Alt1 */ 313 static struct usb_interface_descriptor std_as_out_if1_desc = { 314 .bLength = sizeof std_as_out_if1_desc, 315 .bDescriptorType = USB_DT_INTERFACE, 316 317 .bAlternateSetting = 1, 318 .bNumEndpoints = 1, 319 .bInterfaceClass = USB_CLASS_AUDIO, 320 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 321 .bInterfaceProtocol = UAC_VERSION_2, 322 }; 323 324 /* Audio Stream OUT Intface Desc */ 325 static struct uac2_as_header_descriptor as_out_hdr_desc = { 326 .bLength = sizeof as_out_hdr_desc, 327 .bDescriptorType = USB_DT_CS_INTERFACE, 328 329 .bDescriptorSubtype = UAC_AS_GENERAL, 330 /* .bTerminalLink = DYNAMIC */ 331 .bmControls = 0, 332 .bFormatType = UAC_FORMAT_TYPE_I, 333 .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), 334 .iChannelNames = 0, 335 }; 336 337 /* Audio USB_OUT Format */ 338 static struct uac2_format_type_i_descriptor as_out_fmt1_desc = { 339 .bLength = sizeof as_out_fmt1_desc, 340 .bDescriptorType = USB_DT_CS_INTERFACE, 341 .bDescriptorSubtype = UAC_FORMAT_TYPE, 342 .bFormatType = UAC_FORMAT_TYPE_I, 343 }; 344 345 /* STD AS ISO OUT Endpoint */ 346 static struct usb_endpoint_descriptor fs_epout_desc = { 347 .bLength = USB_DT_ENDPOINT_SIZE, 348 .bDescriptorType = USB_DT_ENDPOINT, 349 350 .bEndpointAddress = USB_DIR_OUT, 351 /* .bmAttributes = DYNAMIC */ 352 /* .wMaxPacketSize = DYNAMIC */ 353 .bInterval = 1, 354 }; 355 356 static struct usb_endpoint_descriptor hs_epout_desc = { 357 .bLength = USB_DT_ENDPOINT_SIZE, 358 .bDescriptorType = USB_DT_ENDPOINT, 359 360 /* .bmAttributes = DYNAMIC */ 361 /* .wMaxPacketSize = DYNAMIC */ 362 /* .bInterval = DYNAMIC */ 363 }; 364 365 static struct usb_endpoint_descriptor ss_epout_desc = { 366 .bLength = USB_DT_ENDPOINT_SIZE, 367 .bDescriptorType = USB_DT_ENDPOINT, 368 369 .bEndpointAddress = USB_DIR_OUT, 370 /* .bmAttributes = DYNAMIC */ 371 /* .wMaxPacketSize = DYNAMIC */ 372 /* .bInterval = DYNAMIC */ 373 }; 374 375 static struct usb_ss_ep_comp_descriptor ss_epout_desc_comp = { 376 .bLength = sizeof(ss_epout_desc_comp), 377 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 378 .bMaxBurst = 0, 379 .bmAttributes = 0, 380 /* wBytesPerInterval = DYNAMIC */ 381 }; 382 383 /* CS AS ISO OUT Endpoint */ 384 static struct uac2_iso_endpoint_descriptor as_iso_out_desc = { 385 .bLength = sizeof as_iso_out_desc, 386 .bDescriptorType = USB_DT_CS_ENDPOINT, 387 388 .bDescriptorSubtype = UAC_EP_GENERAL, 389 .bmAttributes = 0, 390 .bmControls = 0, 391 .bLockDelayUnits = 0, 392 .wLockDelay = 0, 393 }; 394 395 /* STD AS ISO IN Feedback Endpoint */ 396 static struct usb_endpoint_descriptor fs_epin_fback_desc = { 397 .bLength = USB_DT_ENDPOINT_SIZE, 398 .bDescriptorType = USB_DT_ENDPOINT, 399 400 .bEndpointAddress = USB_DIR_IN, 401 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 402 .wMaxPacketSize = cpu_to_le16(3), 403 .bInterval = 1, 404 }; 405 406 static struct usb_endpoint_descriptor hs_epin_fback_desc = { 407 .bLength = USB_DT_ENDPOINT_SIZE, 408 .bDescriptorType = USB_DT_ENDPOINT, 409 410 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 411 .wMaxPacketSize = cpu_to_le16(4), 412 .bInterval = 4, 413 }; 414 415 static struct usb_endpoint_descriptor ss_epin_fback_desc = { 416 .bLength = USB_DT_ENDPOINT_SIZE, 417 .bDescriptorType = USB_DT_ENDPOINT, 418 419 .bEndpointAddress = USB_DIR_IN, 420 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 421 .wMaxPacketSize = cpu_to_le16(4), 422 .bInterval = 4, 423 }; 424 425 static struct usb_ss_ep_comp_descriptor ss_epin_fback_desc_comp = { 426 .bLength = sizeof(ss_epin_fback_desc_comp), 427 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 428 .bMaxBurst = 0, 429 .bmAttributes = 0, 430 .wBytesPerInterval = cpu_to_le16(4), 431 }; 432 433 434 /* Audio Streaming IN Interface - Alt0 */ 435 static struct usb_interface_descriptor std_as_in_if0_desc = { 436 .bLength = sizeof std_as_in_if0_desc, 437 .bDescriptorType = USB_DT_INTERFACE, 438 439 .bAlternateSetting = 0, 440 .bNumEndpoints = 0, 441 .bInterfaceClass = USB_CLASS_AUDIO, 442 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 443 .bInterfaceProtocol = UAC_VERSION_2, 444 }; 445 446 /* Audio Streaming IN Interface - Alt1 */ 447 static struct usb_interface_descriptor std_as_in_if1_desc = { 448 .bLength = sizeof std_as_in_if1_desc, 449 .bDescriptorType = USB_DT_INTERFACE, 450 451 .bAlternateSetting = 1, 452 .bNumEndpoints = 1, 453 .bInterfaceClass = USB_CLASS_AUDIO, 454 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 455 .bInterfaceProtocol = UAC_VERSION_2, 456 }; 457 458 /* Audio Stream IN Intface Desc */ 459 static struct uac2_as_header_descriptor as_in_hdr_desc = { 460 .bLength = sizeof as_in_hdr_desc, 461 .bDescriptorType = USB_DT_CS_INTERFACE, 462 463 .bDescriptorSubtype = UAC_AS_GENERAL, 464 /* .bTerminalLink = DYNAMIC */ 465 .bmControls = 0, 466 .bFormatType = UAC_FORMAT_TYPE_I, 467 .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), 468 .iChannelNames = 0, 469 }; 470 471 /* Audio USB_IN Format */ 472 static struct uac2_format_type_i_descriptor as_in_fmt1_desc = { 473 .bLength = sizeof as_in_fmt1_desc, 474 .bDescriptorType = USB_DT_CS_INTERFACE, 475 .bDescriptorSubtype = UAC_FORMAT_TYPE, 476 .bFormatType = UAC_FORMAT_TYPE_I, 477 }; 478 479 /* STD AS ISO IN Endpoint */ 480 static struct usb_endpoint_descriptor fs_epin_desc = { 481 .bLength = USB_DT_ENDPOINT_SIZE, 482 .bDescriptorType = USB_DT_ENDPOINT, 483 484 .bEndpointAddress = USB_DIR_IN, 485 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 486 /* .wMaxPacketSize = DYNAMIC */ 487 .bInterval = 1, 488 }; 489 490 static struct usb_endpoint_descriptor hs_epin_desc = { 491 .bLength = USB_DT_ENDPOINT_SIZE, 492 .bDescriptorType = USB_DT_ENDPOINT, 493 494 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 495 /* .wMaxPacketSize = DYNAMIC */ 496 /* .bInterval = DYNAMIC */ 497 }; 498 499 static struct usb_endpoint_descriptor ss_epin_desc = { 500 .bLength = USB_DT_ENDPOINT_SIZE, 501 .bDescriptorType = USB_DT_ENDPOINT, 502 503 .bEndpointAddress = USB_DIR_IN, 504 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 505 /* .wMaxPacketSize = DYNAMIC */ 506 /* .bInterval = DYNAMIC */ 507 }; 508 509 static struct usb_ss_ep_comp_descriptor ss_epin_desc_comp = { 510 .bLength = sizeof(ss_epin_desc_comp), 511 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 512 .bMaxBurst = 0, 513 .bmAttributes = 0, 514 /* wBytesPerInterval = DYNAMIC */ 515 }; 516 517 /* CS AS ISO IN Endpoint */ 518 static struct uac2_iso_endpoint_descriptor as_iso_in_desc = { 519 .bLength = sizeof as_iso_in_desc, 520 .bDescriptorType = USB_DT_CS_ENDPOINT, 521 522 .bDescriptorSubtype = UAC_EP_GENERAL, 523 .bmAttributes = 0, 524 .bmControls = 0, 525 .bLockDelayUnits = 0, 526 .wLockDelay = 0, 527 }; 528 529 static struct usb_descriptor_header *fs_audio_desc[] = { 530 (struct usb_descriptor_header *)&iad_desc, 531 (struct usb_descriptor_header *)&std_ac_if_desc, 532 533 (struct usb_descriptor_header *)&ac_hdr_desc, 534 (struct usb_descriptor_header *)&in_clk_src_desc, 535 (struct usb_descriptor_header *)&out_clk_src_desc, 536 (struct usb_descriptor_header *)&usb_out_it_desc, 537 (struct usb_descriptor_header *)&out_feature_unit_desc, 538 (struct usb_descriptor_header *)&io_in_it_desc, 539 (struct usb_descriptor_header *)&usb_in_ot_desc, 540 (struct usb_descriptor_header *)&in_feature_unit_desc, 541 (struct usb_descriptor_header *)&io_out_ot_desc, 542 543 (struct usb_descriptor_header *)&fs_ep_int_desc, 544 545 (struct usb_descriptor_header *)&std_as_out_if0_desc, 546 (struct usb_descriptor_header *)&std_as_out_if1_desc, 547 548 (struct usb_descriptor_header *)&as_out_hdr_desc, 549 (struct usb_descriptor_header *)&as_out_fmt1_desc, 550 (struct usb_descriptor_header *)&fs_epout_desc, 551 (struct usb_descriptor_header *)&as_iso_out_desc, 552 (struct usb_descriptor_header *)&fs_epin_fback_desc, 553 554 (struct usb_descriptor_header *)&std_as_in_if0_desc, 555 (struct usb_descriptor_header *)&std_as_in_if1_desc, 556 557 (struct usb_descriptor_header *)&as_in_hdr_desc, 558 (struct usb_descriptor_header *)&as_in_fmt1_desc, 559 (struct usb_descriptor_header *)&fs_epin_desc, 560 (struct usb_descriptor_header *)&as_iso_in_desc, 561 NULL, 562 }; 563 564 static struct usb_descriptor_header *hs_audio_desc[] = { 565 (struct usb_descriptor_header *)&iad_desc, 566 (struct usb_descriptor_header *)&std_ac_if_desc, 567 568 (struct usb_descriptor_header *)&ac_hdr_desc, 569 (struct usb_descriptor_header *)&in_clk_src_desc, 570 (struct usb_descriptor_header *)&out_clk_src_desc, 571 (struct usb_descriptor_header *)&usb_out_it_desc, 572 (struct usb_descriptor_header *)&out_feature_unit_desc, 573 (struct usb_descriptor_header *)&io_in_it_desc, 574 (struct usb_descriptor_header *)&usb_in_ot_desc, 575 (struct usb_descriptor_header *)&in_feature_unit_desc, 576 (struct usb_descriptor_header *)&io_out_ot_desc, 577 578 (struct usb_descriptor_header *)&hs_ep_int_desc, 579 580 (struct usb_descriptor_header *)&std_as_out_if0_desc, 581 (struct usb_descriptor_header *)&std_as_out_if1_desc, 582 583 (struct usb_descriptor_header *)&as_out_hdr_desc, 584 (struct usb_descriptor_header *)&as_out_fmt1_desc, 585 (struct usb_descriptor_header *)&hs_epout_desc, 586 (struct usb_descriptor_header *)&as_iso_out_desc, 587 (struct usb_descriptor_header *)&hs_epin_fback_desc, 588 589 (struct usb_descriptor_header *)&std_as_in_if0_desc, 590 (struct usb_descriptor_header *)&std_as_in_if1_desc, 591 592 (struct usb_descriptor_header *)&as_in_hdr_desc, 593 (struct usb_descriptor_header *)&as_in_fmt1_desc, 594 (struct usb_descriptor_header *)&hs_epin_desc, 595 (struct usb_descriptor_header *)&as_iso_in_desc, 596 NULL, 597 }; 598 599 static struct usb_descriptor_header *ss_audio_desc[] = { 600 (struct usb_descriptor_header *)&iad_desc, 601 (struct usb_descriptor_header *)&std_ac_if_desc, 602 603 (struct usb_descriptor_header *)&ac_hdr_desc, 604 (struct usb_descriptor_header *)&in_clk_src_desc, 605 (struct usb_descriptor_header *)&out_clk_src_desc, 606 (struct usb_descriptor_header *)&usb_out_it_desc, 607 (struct usb_descriptor_header *)&out_feature_unit_desc, 608 (struct usb_descriptor_header *)&io_in_it_desc, 609 (struct usb_descriptor_header *)&usb_in_ot_desc, 610 (struct usb_descriptor_header *)&in_feature_unit_desc, 611 (struct usb_descriptor_header *)&io_out_ot_desc, 612 613 (struct usb_descriptor_header *)&ss_ep_int_desc, 614 (struct usb_descriptor_header *)&ss_ep_int_desc_comp, 615 616 (struct usb_descriptor_header *)&std_as_out_if0_desc, 617 (struct usb_descriptor_header *)&std_as_out_if1_desc, 618 619 (struct usb_descriptor_header *)&as_out_hdr_desc, 620 (struct usb_descriptor_header *)&as_out_fmt1_desc, 621 (struct usb_descriptor_header *)&ss_epout_desc, 622 (struct usb_descriptor_header *)&ss_epout_desc_comp, 623 (struct usb_descriptor_header *)&as_iso_out_desc, 624 (struct usb_descriptor_header *)&ss_epin_fback_desc, 625 (struct usb_descriptor_header *)&ss_epin_fback_desc_comp, 626 627 (struct usb_descriptor_header *)&std_as_in_if0_desc, 628 (struct usb_descriptor_header *)&std_as_in_if1_desc, 629 630 (struct usb_descriptor_header *)&as_in_hdr_desc, 631 (struct usb_descriptor_header *)&as_in_fmt1_desc, 632 (struct usb_descriptor_header *)&ss_epin_desc, 633 (struct usb_descriptor_header *)&ss_epin_desc_comp, 634 (struct usb_descriptor_header *)&as_iso_in_desc, 635 NULL, 636 }; 637 638 struct cntrl_cur_lay2 { 639 __le16 wCUR; 640 }; 641 642 struct cntrl_range_lay2 { 643 __le16 wNumSubRanges; 644 __le16 wMIN; 645 __le16 wMAX; 646 __le16 wRES; 647 } __packed; 648 649 struct cntrl_cur_lay3 { 650 __le32 dCUR; 651 }; 652 653 struct cntrl_subrange_lay3 { 654 __le32 dMIN; 655 __le32 dMAX; 656 __le32 dRES; 657 } __packed; 658 659 #define ranges_lay3_size(c) (sizeof(c.wNumSubRanges) \ 660 + le16_to_cpu(c.wNumSubRanges) \ 661 * sizeof(struct cntrl_subrange_lay3)) 662 663 #define DECLARE_UAC2_CNTRL_RANGES_LAY3(k, n) \ 664 struct cntrl_ranges_lay3_##k { \ 665 __le16 wNumSubRanges; \ 666 struct cntrl_subrange_lay3 r[n]; \ 667 } __packed 668 669 DECLARE_UAC2_CNTRL_RANGES_LAY3(srates, UAC_MAX_RATES); 670 671 static int get_max_srate(const int *srates) 672 { 673 int i, max_srate = 0; 674 675 for (i = 0; i < UAC_MAX_RATES; i++) { 676 if (srates[i] == 0) 677 break; 678 if (srates[i] > max_srate) 679 max_srate = srates[i]; 680 } 681 return max_srate; 682 } 683 684 static int get_max_bw_for_bint(const struct f_uac2_opts *uac2_opts, 685 u8 bint, unsigned int factor, bool is_playback) 686 { 687 int chmask, srate, ssize; 688 u16 max_size_bw; 689 690 if (is_playback) { 691 chmask = uac2_opts->p_chmask; 692 srate = get_max_srate(uac2_opts->p_srates); 693 ssize = uac2_opts->p_ssize; 694 } else { 695 chmask = uac2_opts->c_chmask; 696 srate = get_max_srate(uac2_opts->c_srates); 697 ssize = uac2_opts->c_ssize; 698 } 699 700 if (is_playback || (uac2_opts->c_sync == USB_ENDPOINT_SYNC_ASYNC)) { 701 // playback is always async, capture only when configured 702 // Win10 requires max packet size + 1 frame 703 srate = srate * (1000 + uac2_opts->fb_max) / 1000; 704 // updated srate is always bigger, therefore DIV_ROUND_UP always yields +1 705 max_size_bw = num_channels(chmask) * ssize * 706 (DIV_ROUND_UP(srate, factor / (1 << (bint - 1)))); 707 } else { 708 // adding 1 frame provision for Win10 709 max_size_bw = num_channels(chmask) * ssize * 710 (DIV_ROUND_UP(srate, factor / (1 << (bint - 1))) + 1); 711 } 712 return max_size_bw; 713 } 714 715 static int set_ep_max_packet_size_bint(struct device *dev, const struct f_uac2_opts *uac2_opts, 716 struct usb_endpoint_descriptor *ep_desc, 717 enum usb_device_speed speed, bool is_playback) 718 { 719 u16 max_size_bw, max_size_ep; 720 u8 bint, opts_bint; 721 char *dir; 722 723 switch (speed) { 724 case USB_SPEED_FULL: 725 max_size_ep = 1023; 726 // fixed 727 bint = ep_desc->bInterval; 728 max_size_bw = get_max_bw_for_bint(uac2_opts, bint, 1000, is_playback); 729 break; 730 731 case USB_SPEED_HIGH: 732 case USB_SPEED_SUPER: 733 max_size_ep = 1024; 734 if (is_playback) 735 opts_bint = uac2_opts->p_hs_bint; 736 else 737 opts_bint = uac2_opts->c_hs_bint; 738 739 if (opts_bint > 0) { 740 /* fixed bint */ 741 bint = opts_bint; 742 max_size_bw = get_max_bw_for_bint(uac2_opts, bint, 8000, is_playback); 743 } else { 744 /* checking bInterval from 4 to 1 whether the required bandwidth fits */ 745 for (bint = 4; bint > 0; --bint) { 746 max_size_bw = get_max_bw_for_bint( 747 uac2_opts, bint, 8000, is_playback); 748 if (max_size_bw <= max_size_ep) 749 break; 750 } 751 } 752 break; 753 754 default: 755 return -EINVAL; 756 } 757 758 if (is_playback) 759 dir = "Playback"; 760 else 761 dir = "Capture"; 762 763 if (max_size_bw <= max_size_ep) 764 dev_dbg(dev, 765 "%s %s: Would use wMaxPacketSize %d and bInterval %d\n", 766 speed_names[speed], dir, max_size_bw, bint); 767 else { 768 dev_warn(dev, 769 "%s %s: Req. wMaxPacketSize %d at bInterval %d > max ISOC %d, may drop data!\n", 770 speed_names[speed], dir, max_size_bw, bint, max_size_ep); 771 max_size_bw = max_size_ep; 772 } 773 774 ep_desc->wMaxPacketSize = cpu_to_le16(max_size_bw); 775 ep_desc->bInterval = bint; 776 777 return 0; 778 } 779 780 static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask) 781 { 782 struct uac2_feature_unit_descriptor *fu_desc; 783 int channels = num_channels(chmask); 784 int fu_desc_size = UAC2_DT_FEATURE_UNIT_SIZE(channels); 785 786 fu_desc = kzalloc(fu_desc_size, GFP_KERNEL); 787 if (!fu_desc) 788 return NULL; 789 790 fu_desc->bLength = fu_desc_size; 791 fu_desc->bDescriptorType = USB_DT_CS_INTERFACE; 792 793 fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT; 794 795 /* bUnitID, bSourceID and bmaControls will be defined later */ 796 797 return fu_desc; 798 } 799 800 /* Use macro to overcome line length limitation */ 801 #define USBDHDR(p) (struct usb_descriptor_header *)(p) 802 803 static void setup_headers(struct f_uac2_opts *opts, 804 struct usb_descriptor_header **headers, 805 enum usb_device_speed speed) 806 { 807 struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL; 808 struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL; 809 struct usb_ss_ep_comp_descriptor *epin_fback_desc_comp = NULL; 810 struct usb_ss_ep_comp_descriptor *ep_int_desc_comp = NULL; 811 struct usb_endpoint_descriptor *epout_desc; 812 struct usb_endpoint_descriptor *epin_desc; 813 struct usb_endpoint_descriptor *epin_fback_desc; 814 struct usb_endpoint_descriptor *ep_int_desc; 815 int i; 816 817 switch (speed) { 818 case USB_SPEED_FULL: 819 epout_desc = &fs_epout_desc; 820 epin_desc = &fs_epin_desc; 821 epin_fback_desc = &fs_epin_fback_desc; 822 ep_int_desc = &fs_ep_int_desc; 823 break; 824 case USB_SPEED_HIGH: 825 epout_desc = &hs_epout_desc; 826 epin_desc = &hs_epin_desc; 827 epin_fback_desc = &hs_epin_fback_desc; 828 ep_int_desc = &hs_ep_int_desc; 829 break; 830 default: 831 epout_desc = &ss_epout_desc; 832 epin_desc = &ss_epin_desc; 833 epout_desc_comp = &ss_epout_desc_comp; 834 epin_desc_comp = &ss_epin_desc_comp; 835 epin_fback_desc = &ss_epin_fback_desc; 836 epin_fback_desc_comp = &ss_epin_fback_desc_comp; 837 ep_int_desc = &ss_ep_int_desc; 838 ep_int_desc_comp = &ss_ep_int_desc_comp; 839 } 840 841 i = 0; 842 headers[i++] = USBDHDR(&iad_desc); 843 headers[i++] = USBDHDR(&std_ac_if_desc); 844 headers[i++] = USBDHDR(&ac_hdr_desc); 845 if (EPIN_EN(opts)) 846 headers[i++] = USBDHDR(&in_clk_src_desc); 847 if (EPOUT_EN(opts)) { 848 headers[i++] = USBDHDR(&out_clk_src_desc); 849 headers[i++] = USBDHDR(&usb_out_it_desc); 850 851 if (FUOUT_EN(opts)) 852 headers[i++] = USBDHDR(out_feature_unit_desc); 853 } 854 855 if (EPIN_EN(opts)) { 856 headers[i++] = USBDHDR(&io_in_it_desc); 857 858 if (FUIN_EN(opts)) 859 headers[i++] = USBDHDR(in_feature_unit_desc); 860 861 headers[i++] = USBDHDR(&usb_in_ot_desc); 862 } 863 864 if (EPOUT_EN(opts)) 865 headers[i++] = USBDHDR(&io_out_ot_desc); 866 867 if (FUOUT_EN(opts) || FUIN_EN(opts)) { 868 headers[i++] = USBDHDR(ep_int_desc); 869 if (ep_int_desc_comp) 870 headers[i++] = USBDHDR(ep_int_desc_comp); 871 } 872 873 if (EPOUT_EN(opts)) { 874 headers[i++] = USBDHDR(&std_as_out_if0_desc); 875 headers[i++] = USBDHDR(&std_as_out_if1_desc); 876 headers[i++] = USBDHDR(&as_out_hdr_desc); 877 headers[i++] = USBDHDR(&as_out_fmt1_desc); 878 headers[i++] = USBDHDR(epout_desc); 879 if (epout_desc_comp) 880 headers[i++] = USBDHDR(epout_desc_comp); 881 882 headers[i++] = USBDHDR(&as_iso_out_desc); 883 884 if (EPOUT_FBACK_IN_EN(opts)) { 885 headers[i++] = USBDHDR(epin_fback_desc); 886 if (epin_fback_desc_comp) 887 headers[i++] = USBDHDR(epin_fback_desc_comp); 888 } 889 } 890 891 if (EPIN_EN(opts)) { 892 headers[i++] = USBDHDR(&std_as_in_if0_desc); 893 headers[i++] = USBDHDR(&std_as_in_if1_desc); 894 headers[i++] = USBDHDR(&as_in_hdr_desc); 895 headers[i++] = USBDHDR(&as_in_fmt1_desc); 896 headers[i++] = USBDHDR(epin_desc); 897 if (epin_desc_comp) 898 headers[i++] = USBDHDR(epin_desc_comp); 899 900 headers[i++] = USBDHDR(&as_iso_in_desc); 901 } 902 headers[i] = NULL; 903 } 904 905 static void setup_descriptor(struct f_uac2_opts *opts) 906 { 907 /* patch descriptors */ 908 int i = 1; /* ID's start with 1 */ 909 910 if (EPOUT_EN(opts)) 911 usb_out_it_desc.bTerminalID = i++; 912 if (EPIN_EN(opts)) 913 io_in_it_desc.bTerminalID = i++; 914 if (EPOUT_EN(opts)) 915 io_out_ot_desc.bTerminalID = i++; 916 if (EPIN_EN(opts)) 917 usb_in_ot_desc.bTerminalID = i++; 918 if (FUOUT_EN(opts)) 919 out_feature_unit_desc->bUnitID = i++; 920 if (FUIN_EN(opts)) 921 in_feature_unit_desc->bUnitID = i++; 922 if (EPOUT_EN(opts)) 923 out_clk_src_desc.bClockID = i++; 924 if (EPIN_EN(opts)) 925 in_clk_src_desc.bClockID = i++; 926 927 usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID; 928 929 if (FUIN_EN(opts)) { 930 usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID; 931 in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID; 932 } else { 933 usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID; 934 } 935 936 usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID; 937 io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID; 938 io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID; 939 940 if (FUOUT_EN(opts)) { 941 io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID; 942 out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID; 943 } else { 944 io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID; 945 } 946 947 as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID; 948 as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; 949 950 iad_desc.bInterfaceCount = 1; 951 ac_hdr_desc.wTotalLength = cpu_to_le16(sizeof(ac_hdr_desc)); 952 953 if (EPIN_EN(opts)) { 954 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 955 956 len += sizeof(in_clk_src_desc); 957 len += sizeof(usb_in_ot_desc); 958 959 if (FUIN_EN(opts)) 960 len += in_feature_unit_desc->bLength; 961 962 len += sizeof(io_in_it_desc); 963 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 964 iad_desc.bInterfaceCount++; 965 } 966 if (EPOUT_EN(opts)) { 967 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 968 969 len += sizeof(out_clk_src_desc); 970 len += sizeof(usb_out_it_desc); 971 972 if (FUOUT_EN(opts)) 973 len += out_feature_unit_desc->bLength; 974 975 len += sizeof(io_out_ot_desc); 976 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 977 iad_desc.bInterfaceCount++; 978 } 979 980 setup_headers(opts, fs_audio_desc, USB_SPEED_FULL); 981 setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH); 982 setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER); 983 } 984 985 static int afunc_validate_opts(struct g_audio *agdev, struct device *dev) 986 { 987 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 988 const char *msg = NULL; 989 990 if (!opts->p_chmask && !opts->c_chmask) 991 msg = "no playback and capture channels"; 992 else if (opts->p_chmask & ~UAC2_CHANNEL_MASK) 993 msg = "unsupported playback channels mask"; 994 else if (opts->c_chmask & ~UAC2_CHANNEL_MASK) 995 msg = "unsupported capture channels mask"; 996 else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) 997 msg = "incorrect playback sample size"; 998 else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) 999 msg = "incorrect capture sample size"; 1000 else if (!opts->p_srates[0]) 1001 msg = "incorrect playback sampling rate"; 1002 else if (!opts->c_srates[0]) 1003 msg = "incorrect capture sampling rate"; 1004 1005 else if (opts->p_volume_max <= opts->p_volume_min) 1006 msg = "incorrect playback volume max/min"; 1007 else if (opts->c_volume_max <= opts->c_volume_min) 1008 msg = "incorrect capture volume max/min"; 1009 else if (opts->p_volume_res <= 0) 1010 msg = "negative/zero playback volume resolution"; 1011 else if (opts->c_volume_res <= 0) 1012 msg = "negative/zero capture volume resolution"; 1013 1014 else if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) 1015 msg = "incorrect playback volume resolution"; 1016 else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) 1017 msg = "incorrect capture volume resolution"; 1018 1019 else if ((opts->p_hs_bint < 0) || (opts->p_hs_bint > 4)) 1020 msg = "incorrect playback HS/SS bInterval (1-4: fixed, 0: auto)"; 1021 else if ((opts->c_hs_bint < 0) || (opts->c_hs_bint > 4)) 1022 msg = "incorrect capture HS/SS bInterval (1-4: fixed, 0: auto)"; 1023 1024 if (msg) { 1025 dev_err(dev, "Error: %s\n", msg); 1026 return -EINVAL; 1027 } 1028 1029 return 0; 1030 } 1031 1032 static int 1033 afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) 1034 { 1035 struct f_uac2 *uac2 = func_to_uac2(fn); 1036 struct g_audio *agdev = func_to_g_audio(fn); 1037 struct usb_composite_dev *cdev = cfg->cdev; 1038 struct usb_gadget *gadget = cdev->gadget; 1039 struct device *dev = &gadget->dev; 1040 struct f_uac2_opts *uac2_opts = g_audio_to_uac2_opts(agdev); 1041 struct usb_string *us; 1042 int ret; 1043 1044 ret = afunc_validate_opts(agdev, dev); 1045 if (ret) 1046 return ret; 1047 1048 strings_fn[STR_ASSOC].s = uac2_opts->function_name; 1049 1050 us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); 1051 if (IS_ERR(us)) 1052 return PTR_ERR(us); 1053 1054 if (FUOUT_EN(uac2_opts)) { 1055 out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask); 1056 if (!out_feature_unit_desc) 1057 return -ENOMEM; 1058 } 1059 if (FUIN_EN(uac2_opts)) { 1060 in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask); 1061 if (!in_feature_unit_desc) { 1062 ret = -ENOMEM; 1063 goto err_free_fu; 1064 } 1065 } 1066 1067 iad_desc.iFunction = us[STR_ASSOC].id; 1068 std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; 1069 in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; 1070 out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; 1071 usb_out_it_desc.iTerminal = us[STR_USB_IT].id; 1072 io_in_it_desc.iTerminal = us[STR_IO_IT].id; 1073 usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; 1074 io_out_ot_desc.iTerminal = us[STR_IO_OT].id; 1075 std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; 1076 std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; 1077 std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; 1078 std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; 1079 1080 if (FUOUT_EN(uac2_opts)) { 1081 u8 *i_feature = (u8 *)out_feature_unit_desc + 1082 out_feature_unit_desc->bLength - 1; 1083 *i_feature = us[STR_FU_OUT].id; 1084 } 1085 if (FUIN_EN(uac2_opts)) { 1086 u8 *i_feature = (u8 *)in_feature_unit_desc + 1087 in_feature_unit_desc->bLength - 1; 1088 *i_feature = us[STR_FU_IN].id; 1089 } 1090 1091 1092 /* Initialize the configurable parameters */ 1093 usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1094 usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1095 io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1096 io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1097 as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1098 as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1099 as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1100 as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1101 as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; 1102 as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; 1103 as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; 1104 as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; 1105 if (FUOUT_EN(uac2_opts)) { 1106 __le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0]; 1107 u32 control = 0; 1108 1109 if (uac2_opts->c_mute_present) 1110 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1111 if (uac2_opts->c_volume_present) 1112 control |= CONTROL_RDWR << FU_VOL_CTRL; 1113 *bma = cpu_to_le32(control); 1114 } 1115 if (FUIN_EN(uac2_opts)) { 1116 __le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0]; 1117 u32 control = 0; 1118 1119 if (uac2_opts->p_mute_present) 1120 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1121 if (uac2_opts->p_volume_present) 1122 control |= CONTROL_RDWR << FU_VOL_CTRL; 1123 *bma = cpu_to_le32(control); 1124 } 1125 1126 ret = usb_interface_id(cfg, fn); 1127 if (ret < 0) { 1128 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1129 goto err_free_fu; 1130 } 1131 iad_desc.bFirstInterface = ret; 1132 1133 std_ac_if_desc.bInterfaceNumber = ret; 1134 uac2->ac_intf = ret; 1135 uac2->ac_alt = 0; 1136 1137 if (EPOUT_EN(uac2_opts)) { 1138 ret = usb_interface_id(cfg, fn); 1139 if (ret < 0) { 1140 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1141 goto err_free_fu; 1142 } 1143 std_as_out_if0_desc.bInterfaceNumber = ret; 1144 std_as_out_if1_desc.bInterfaceNumber = ret; 1145 std_as_out_if1_desc.bNumEndpoints = 1; 1146 uac2->as_out_intf = ret; 1147 uac2->as_out_alt = 0; 1148 1149 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1150 fs_epout_desc.bmAttributes = 1151 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1152 hs_epout_desc.bmAttributes = 1153 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1154 ss_epout_desc.bmAttributes = 1155 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1156 std_as_out_if1_desc.bNumEndpoints++; 1157 } else { 1158 fs_epout_desc.bmAttributes = 1159 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1160 hs_epout_desc.bmAttributes = 1161 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1162 ss_epout_desc.bmAttributes = 1163 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1164 } 1165 } 1166 1167 if (EPIN_EN(uac2_opts)) { 1168 ret = usb_interface_id(cfg, fn); 1169 if (ret < 0) { 1170 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1171 goto err_free_fu; 1172 } 1173 std_as_in_if0_desc.bInterfaceNumber = ret; 1174 std_as_in_if1_desc.bInterfaceNumber = ret; 1175 uac2->as_in_intf = ret; 1176 uac2->as_in_alt = 0; 1177 } 1178 1179 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) { 1180 uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc); 1181 if (!uac2->int_ep) { 1182 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1183 ret = -ENODEV; 1184 goto err_free_fu; 1185 } 1186 1187 std_ac_if_desc.bNumEndpoints = 1; 1188 } 1189 1190 hs_epin_desc.bInterval = uac2_opts->p_hs_bint; 1191 ss_epin_desc.bInterval = uac2_opts->p_hs_bint; 1192 hs_epout_desc.bInterval = uac2_opts->c_hs_bint; 1193 ss_epout_desc.bInterval = uac2_opts->c_hs_bint; 1194 1195 /* Calculate wMaxPacketSize according to audio bandwidth */ 1196 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epin_desc, 1197 USB_SPEED_FULL, true); 1198 if (ret < 0) { 1199 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1200 return ret; 1201 } 1202 1203 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epout_desc, 1204 USB_SPEED_FULL, false); 1205 if (ret < 0) { 1206 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1207 return ret; 1208 } 1209 1210 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epin_desc, 1211 USB_SPEED_HIGH, true); 1212 if (ret < 0) { 1213 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1214 return ret; 1215 } 1216 1217 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epout_desc, 1218 USB_SPEED_HIGH, false); 1219 if (ret < 0) { 1220 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1221 return ret; 1222 } 1223 1224 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epin_desc, 1225 USB_SPEED_SUPER, true); 1226 if (ret < 0) { 1227 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1228 return ret; 1229 } 1230 1231 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epout_desc, 1232 USB_SPEED_SUPER, false); 1233 if (ret < 0) { 1234 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1235 return ret; 1236 } 1237 1238 if (EPOUT_EN(uac2_opts)) { 1239 agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); 1240 if (!agdev->out_ep) { 1241 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1242 ret = -ENODEV; 1243 goto err_free_fu; 1244 } 1245 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1246 agdev->in_ep_fback = usb_ep_autoconfig(gadget, 1247 &fs_epin_fback_desc); 1248 if (!agdev->in_ep_fback) { 1249 dev_err(dev, "%s:%d Error!\n", 1250 __func__, __LINE__); 1251 ret = -ENODEV; 1252 goto err_free_fu; 1253 } 1254 } 1255 } 1256 1257 if (EPIN_EN(uac2_opts)) { 1258 agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); 1259 if (!agdev->in_ep) { 1260 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1261 ret = -ENODEV; 1262 goto err_free_fu; 1263 } 1264 } 1265 1266 agdev->in_ep_maxpsize = max_t(u16, 1267 le16_to_cpu(fs_epin_desc.wMaxPacketSize), 1268 le16_to_cpu(hs_epin_desc.wMaxPacketSize)); 1269 agdev->out_ep_maxpsize = max_t(u16, 1270 le16_to_cpu(fs_epout_desc.wMaxPacketSize), 1271 le16_to_cpu(hs_epout_desc.wMaxPacketSize)); 1272 1273 agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize, 1274 le16_to_cpu(ss_epin_desc.wMaxPacketSize)); 1275 agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize, 1276 le16_to_cpu(ss_epout_desc.wMaxPacketSize)); 1277 1278 ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize; 1279 ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize; 1280 1281 // HS and SS endpoint addresses are copied from autoconfigured FS descriptors 1282 hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1283 hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1284 hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1285 hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1286 ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1287 ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1288 ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1289 ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1290 1291 setup_descriptor(uac2_opts); 1292 1293 ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc, 1294 ss_audio_desc); 1295 if (ret) 1296 goto err_free_fu; 1297 1298 agdev->gadget = gadget; 1299 1300 agdev->params.p_chmask = uac2_opts->p_chmask; 1301 memcpy(agdev->params.p_srates, uac2_opts->p_srates, 1302 sizeof(agdev->params.p_srates)); 1303 agdev->params.p_ssize = uac2_opts->p_ssize; 1304 if (FUIN_EN(uac2_opts)) { 1305 agdev->params.p_fu.id = USB_IN_FU_ID; 1306 agdev->params.p_fu.mute_present = uac2_opts->p_mute_present; 1307 agdev->params.p_fu.volume_present = uac2_opts->p_volume_present; 1308 agdev->params.p_fu.volume_min = uac2_opts->p_volume_min; 1309 agdev->params.p_fu.volume_max = uac2_opts->p_volume_max; 1310 agdev->params.p_fu.volume_res = uac2_opts->p_volume_res; 1311 } 1312 agdev->params.c_chmask = uac2_opts->c_chmask; 1313 memcpy(agdev->params.c_srates, uac2_opts->c_srates, 1314 sizeof(agdev->params.c_srates)); 1315 agdev->params.c_ssize = uac2_opts->c_ssize; 1316 if (FUOUT_EN(uac2_opts)) { 1317 agdev->params.c_fu.id = USB_OUT_FU_ID; 1318 agdev->params.c_fu.mute_present = uac2_opts->c_mute_present; 1319 agdev->params.c_fu.volume_present = uac2_opts->c_volume_present; 1320 agdev->params.c_fu.volume_min = uac2_opts->c_volume_min; 1321 agdev->params.c_fu.volume_max = uac2_opts->c_volume_max; 1322 agdev->params.c_fu.volume_res = uac2_opts->c_volume_res; 1323 } 1324 agdev->params.req_number = uac2_opts->req_number; 1325 agdev->params.fb_max = uac2_opts->fb_max; 1326 1327 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) 1328 agdev->notify = afunc_notify; 1329 1330 ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); 1331 if (ret) 1332 goto err_free_descs; 1333 1334 return 0; 1335 1336 err_free_descs: 1337 usb_free_all_descriptors(fn); 1338 agdev->gadget = NULL; 1339 err_free_fu: 1340 kfree(out_feature_unit_desc); 1341 out_feature_unit_desc = NULL; 1342 kfree(in_feature_unit_desc); 1343 in_feature_unit_desc = NULL; 1344 return ret; 1345 } 1346 1347 static void 1348 afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req) 1349 { 1350 struct g_audio *agdev = req->context; 1351 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1352 1353 atomic_dec(&uac2->int_count); 1354 kfree(req->buf); 1355 usb_ep_free_request(_ep, req); 1356 } 1357 1358 static int 1359 afunc_notify(struct g_audio *agdev, int unit_id, int cs) 1360 { 1361 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1362 struct usb_request *req; 1363 struct uac2_interrupt_data_msg *msg; 1364 u16 w_index, w_value; 1365 int ret; 1366 1367 if (!uac2->int_ep->enabled) 1368 return 0; 1369 1370 if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) { 1371 atomic_dec(&uac2->int_count); 1372 return 0; 1373 } 1374 1375 req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC); 1376 if (req == NULL) { 1377 ret = -ENOMEM; 1378 goto err_dec_int_count; 1379 } 1380 1381 msg = kzalloc(sizeof(*msg), GFP_ATOMIC); 1382 if (msg == NULL) { 1383 ret = -ENOMEM; 1384 goto err_free_request; 1385 } 1386 1387 w_index = unit_id << 8 | uac2->ac_intf; 1388 w_value = cs << 8; 1389 1390 msg->bInfo = 0; /* Non-vendor, interface interrupt */ 1391 msg->bAttribute = UAC2_CS_CUR; 1392 msg->wIndex = cpu_to_le16(w_index); 1393 msg->wValue = cpu_to_le16(w_value); 1394 1395 req->length = sizeof(*msg); 1396 req->buf = msg; 1397 req->context = agdev; 1398 req->complete = afunc_notify_complete; 1399 1400 ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC); 1401 1402 if (ret) 1403 goto err_free_msg; 1404 1405 return 0; 1406 1407 err_free_msg: 1408 kfree(msg); 1409 err_free_request: 1410 usb_ep_free_request(uac2->int_ep, req); 1411 err_dec_int_count: 1412 atomic_dec(&uac2->int_count); 1413 1414 return ret; 1415 } 1416 1417 static int 1418 afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) 1419 { 1420 struct usb_composite_dev *cdev = fn->config->cdev; 1421 struct f_uac2 *uac2 = func_to_uac2(fn); 1422 struct g_audio *agdev = func_to_g_audio(fn); 1423 struct usb_gadget *gadget = cdev->gadget; 1424 struct device *dev = &gadget->dev; 1425 int ret = 0; 1426 1427 /* No i/f has more than 2 alt settings */ 1428 if (alt > 1) { 1429 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1430 return -EINVAL; 1431 } 1432 1433 if (intf == uac2->ac_intf) { 1434 /* Control I/f has only 1 AltSetting - 0 */ 1435 if (alt) { 1436 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1437 return -EINVAL; 1438 } 1439 1440 /* restart interrupt endpoint */ 1441 if (uac2->int_ep) { 1442 usb_ep_disable(uac2->int_ep); 1443 config_ep_by_speed(gadget, &agdev->func, uac2->int_ep); 1444 usb_ep_enable(uac2->int_ep); 1445 } 1446 1447 return 0; 1448 } 1449 1450 if (intf == uac2->as_out_intf) { 1451 uac2->as_out_alt = alt; 1452 1453 if (alt) 1454 ret = u_audio_start_capture(&uac2->g_audio); 1455 else 1456 u_audio_stop_capture(&uac2->g_audio); 1457 } else if (intf == uac2->as_in_intf) { 1458 uac2->as_in_alt = alt; 1459 1460 if (alt) 1461 ret = u_audio_start_playback(&uac2->g_audio); 1462 else 1463 u_audio_stop_playback(&uac2->g_audio); 1464 } else { 1465 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1466 return -EINVAL; 1467 } 1468 1469 return ret; 1470 } 1471 1472 static int 1473 afunc_get_alt(struct usb_function *fn, unsigned intf) 1474 { 1475 struct f_uac2 *uac2 = func_to_uac2(fn); 1476 struct g_audio *agdev = func_to_g_audio(fn); 1477 1478 if (intf == uac2->ac_intf) 1479 return uac2->ac_alt; 1480 else if (intf == uac2->as_out_intf) 1481 return uac2->as_out_alt; 1482 else if (intf == uac2->as_in_intf) 1483 return uac2->as_in_alt; 1484 else 1485 dev_err(&agdev->gadget->dev, 1486 "%s:%d Invalid Interface %d!\n", 1487 __func__, __LINE__, intf); 1488 1489 return -EINVAL; 1490 } 1491 1492 static void 1493 afunc_disable(struct usb_function *fn) 1494 { 1495 struct f_uac2 *uac2 = func_to_uac2(fn); 1496 1497 uac2->as_in_alt = 0; 1498 uac2->as_out_alt = 0; 1499 u_audio_stop_capture(&uac2->g_audio); 1500 u_audio_stop_playback(&uac2->g_audio); 1501 if (uac2->int_ep) 1502 usb_ep_disable(uac2->int_ep); 1503 } 1504 1505 static void 1506 afunc_suspend(struct usb_function *fn) 1507 { 1508 struct f_uac2 *uac2 = func_to_uac2(fn); 1509 1510 u_audio_suspend(&uac2->g_audio); 1511 } 1512 1513 static int 1514 in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1515 { 1516 struct usb_request *req = fn->config->cdev->req; 1517 struct g_audio *agdev = func_to_g_audio(fn); 1518 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1519 u16 w_length = le16_to_cpu(cr->wLength); 1520 u16 w_index = le16_to_cpu(cr->wIndex); 1521 u16 w_value = le16_to_cpu(cr->wValue); 1522 u8 entity_id = (w_index >> 8) & 0xff; 1523 u8 control_selector = w_value >> 8; 1524 int value = -EOPNOTSUPP; 1525 u32 p_srate, c_srate; 1526 1527 u_audio_get_playback_srate(agdev, &p_srate); 1528 u_audio_get_capture_srate(agdev, &c_srate); 1529 1530 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1531 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1532 struct cntrl_cur_lay3 c; 1533 1534 memset(&c, 0, sizeof(struct cntrl_cur_lay3)); 1535 1536 if (entity_id == USB_IN_CLK_ID) 1537 c.dCUR = cpu_to_le32(p_srate); 1538 else if (entity_id == USB_OUT_CLK_ID) 1539 c.dCUR = cpu_to_le32(c_srate); 1540 1541 value = min_t(unsigned int, w_length, sizeof(c)); 1542 memcpy(req->buf, &c, value); 1543 } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { 1544 *(u8 *)req->buf = 1; 1545 value = min_t(unsigned int, w_length, 1); 1546 } else { 1547 dev_err(&agdev->gadget->dev, 1548 "%s:%d control_selector=%d TODO!\n", 1549 __func__, __LINE__, control_selector); 1550 } 1551 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1552 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1553 unsigned int is_playback = 0; 1554 1555 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1556 is_playback = 1; 1557 1558 if (control_selector == UAC_FU_MUTE) { 1559 unsigned int mute; 1560 1561 u_audio_get_mute(agdev, is_playback, &mute); 1562 1563 *(u8 *)req->buf = mute; 1564 value = min_t(unsigned int, w_length, 1); 1565 } else if (control_selector == UAC_FU_VOLUME) { 1566 struct cntrl_cur_lay2 c; 1567 s16 volume; 1568 1569 memset(&c, 0, sizeof(struct cntrl_cur_lay2)); 1570 1571 u_audio_get_volume(agdev, is_playback, &volume); 1572 c.wCUR = cpu_to_le16(volume); 1573 1574 value = min_t(unsigned int, w_length, sizeof(c)); 1575 memcpy(req->buf, &c, value); 1576 } else { 1577 dev_err(&agdev->gadget->dev, 1578 "%s:%d control_selector=%d TODO!\n", 1579 __func__, __LINE__, control_selector); 1580 } 1581 } else { 1582 dev_err(&agdev->gadget->dev, 1583 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1584 __func__, __LINE__, entity_id, control_selector); 1585 } 1586 1587 return value; 1588 } 1589 1590 static int 1591 in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1592 { 1593 struct usb_request *req = fn->config->cdev->req; 1594 struct g_audio *agdev = func_to_g_audio(fn); 1595 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1596 u16 w_length = le16_to_cpu(cr->wLength); 1597 u16 w_index = le16_to_cpu(cr->wIndex); 1598 u16 w_value = le16_to_cpu(cr->wValue); 1599 u8 entity_id = (w_index >> 8) & 0xff; 1600 u8 control_selector = w_value >> 8; 1601 int value = -EOPNOTSUPP; 1602 1603 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1604 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1605 struct cntrl_ranges_lay3_srates rs; 1606 int i; 1607 int wNumSubRanges = 0; 1608 int srate; 1609 int *srates; 1610 1611 if (entity_id == USB_IN_CLK_ID) 1612 srates = opts->p_srates; 1613 else if (entity_id == USB_OUT_CLK_ID) 1614 srates = opts->c_srates; 1615 else 1616 return -EOPNOTSUPP; 1617 for (i = 0; i < UAC_MAX_RATES; i++) { 1618 srate = srates[i]; 1619 if (srate == 0) 1620 break; 1621 1622 rs.r[wNumSubRanges].dMIN = cpu_to_le32(srate); 1623 rs.r[wNumSubRanges].dMAX = cpu_to_le32(srate); 1624 rs.r[wNumSubRanges].dRES = 0; 1625 wNumSubRanges++; 1626 dev_dbg(&agdev->gadget->dev, 1627 "%s(): clk %d: rate ID %d: %d\n", 1628 __func__, entity_id, wNumSubRanges, srate); 1629 } 1630 rs.wNumSubRanges = cpu_to_le16(wNumSubRanges); 1631 value = min_t(unsigned int, w_length, ranges_lay3_size(rs)); 1632 dev_dbg(&agdev->gadget->dev, "%s(): sending %d rates, size %d\n", 1633 __func__, rs.wNumSubRanges, value); 1634 memcpy(req->buf, &rs, value); 1635 } else { 1636 dev_err(&agdev->gadget->dev, 1637 "%s:%d control_selector=%d TODO!\n", 1638 __func__, __LINE__, control_selector); 1639 } 1640 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1641 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1642 unsigned int is_playback = 0; 1643 1644 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1645 is_playback = 1; 1646 1647 if (control_selector == UAC_FU_VOLUME) { 1648 struct cntrl_range_lay2 r; 1649 s16 max_db, min_db, res_db; 1650 1651 if (is_playback) { 1652 max_db = opts->p_volume_max; 1653 min_db = opts->p_volume_min; 1654 res_db = opts->p_volume_res; 1655 } else { 1656 max_db = opts->c_volume_max; 1657 min_db = opts->c_volume_min; 1658 res_db = opts->c_volume_res; 1659 } 1660 1661 r.wMAX = cpu_to_le16(max_db); 1662 r.wMIN = cpu_to_le16(min_db); 1663 r.wRES = cpu_to_le16(res_db); 1664 r.wNumSubRanges = cpu_to_le16(1); 1665 1666 value = min_t(unsigned int, w_length, sizeof(r)); 1667 memcpy(req->buf, &r, value); 1668 } else { 1669 dev_err(&agdev->gadget->dev, 1670 "%s:%d control_selector=%d TODO!\n", 1671 __func__, __LINE__, control_selector); 1672 } 1673 } else { 1674 dev_err(&agdev->gadget->dev, 1675 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1676 __func__, __LINE__, entity_id, control_selector); 1677 } 1678 1679 return value; 1680 } 1681 1682 static int 1683 ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1684 { 1685 if (cr->bRequest == UAC2_CS_CUR) 1686 return in_rq_cur(fn, cr); 1687 else if (cr->bRequest == UAC2_CS_RANGE) 1688 return in_rq_range(fn, cr); 1689 else 1690 return -EOPNOTSUPP; 1691 } 1692 1693 static void uac2_cs_control_sam_freq(struct usb_ep *ep, struct usb_request *req) 1694 { 1695 struct usb_function *fn = ep->driver_data; 1696 struct g_audio *agdev = func_to_g_audio(fn); 1697 struct f_uac2 *uac2 = func_to_uac2(fn); 1698 u32 val; 1699 1700 if (req->actual != 4) 1701 return; 1702 1703 val = le32_to_cpu(*((__le32 *)req->buf)); 1704 dev_dbg(&agdev->gadget->dev, "%s val: %d.\n", __func__, val); 1705 if (uac2->clock_id == USB_IN_CLK_ID) { 1706 u_audio_set_playback_srate(agdev, val); 1707 } else if (uac2->clock_id == USB_OUT_CLK_ID) { 1708 u_audio_set_capture_srate(agdev, val); 1709 } 1710 } 1711 1712 static void 1713 out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) 1714 { 1715 struct g_audio *agdev = req->context; 1716 struct usb_composite_dev *cdev = agdev->func.config->cdev; 1717 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1718 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1719 struct usb_ctrlrequest *cr = &uac2->setup_cr; 1720 u16 w_index = le16_to_cpu(cr->wIndex); 1721 u16 w_value = le16_to_cpu(cr->wValue); 1722 u8 entity_id = (w_index >> 8) & 0xff; 1723 u8 control_selector = w_value >> 8; 1724 1725 if (req->status != 0) { 1726 dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status); 1727 return; 1728 } 1729 1730 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1731 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1732 unsigned int is_playback = 0; 1733 1734 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1735 is_playback = 1; 1736 1737 if (control_selector == UAC_FU_MUTE) { 1738 u8 mute = *(u8 *)req->buf; 1739 1740 u_audio_set_mute(agdev, is_playback, mute); 1741 1742 return; 1743 } else if (control_selector == UAC_FU_VOLUME) { 1744 struct cntrl_cur_lay2 *c = req->buf; 1745 s16 volume; 1746 1747 volume = le16_to_cpu(c->wCUR); 1748 u_audio_set_volume(agdev, is_playback, volume); 1749 1750 return; 1751 } else { 1752 dev_err(&agdev->gadget->dev, 1753 "%s:%d control_selector=%d TODO!\n", 1754 __func__, __LINE__, control_selector); 1755 usb_ep_set_halt(ep); 1756 } 1757 } 1758 } 1759 1760 static int 1761 out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1762 { 1763 struct usb_composite_dev *cdev = fn->config->cdev; 1764 struct usb_request *req = fn->config->cdev->req; 1765 struct g_audio *agdev = func_to_g_audio(fn); 1766 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1767 struct f_uac2 *uac2 = func_to_uac2(fn); 1768 u16 w_length = le16_to_cpu(cr->wLength); 1769 u16 w_index = le16_to_cpu(cr->wIndex); 1770 u16 w_value = le16_to_cpu(cr->wValue); 1771 u8 entity_id = (w_index >> 8) & 0xff; 1772 u8 control_selector = w_value >> 8; 1773 u8 clock_id = w_index >> 8; 1774 1775 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1776 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1777 dev_dbg(&agdev->gadget->dev, 1778 "control_selector UAC2_CS_CONTROL_SAM_FREQ, clock: %d\n", clock_id); 1779 cdev->gadget->ep0->driver_data = fn; 1780 uac2->clock_id = clock_id; 1781 req->complete = uac2_cs_control_sam_freq; 1782 return w_length; 1783 } 1784 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1785 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1786 memcpy(&uac2->setup_cr, cr, sizeof(*cr)); 1787 req->context = agdev; 1788 req->complete = out_rq_cur_complete; 1789 1790 return w_length; 1791 } else { 1792 dev_err(&agdev->gadget->dev, 1793 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1794 __func__, __LINE__, entity_id, control_selector); 1795 } 1796 return -EOPNOTSUPP; 1797 } 1798 1799 static int 1800 setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1801 { 1802 struct f_uac2 *uac2 = func_to_uac2(fn); 1803 struct g_audio *agdev = func_to_g_audio(fn); 1804 u16 w_index = le16_to_cpu(cr->wIndex); 1805 u8 intf = w_index & 0xff; 1806 1807 if (intf != uac2->ac_intf) { 1808 dev_err(&agdev->gadget->dev, 1809 "%s:%d Error!\n", __func__, __LINE__); 1810 return -EOPNOTSUPP; 1811 } 1812 1813 if (cr->bRequestType & USB_DIR_IN) 1814 return ac_rq_in(fn, cr); 1815 else if (cr->bRequest == UAC2_CS_CUR) 1816 return out_rq_cur(fn, cr); 1817 1818 return -EOPNOTSUPP; 1819 } 1820 1821 static int 1822 afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1823 { 1824 struct usb_composite_dev *cdev = fn->config->cdev; 1825 struct g_audio *agdev = func_to_g_audio(fn); 1826 struct usb_request *req = cdev->req; 1827 u16 w_length = le16_to_cpu(cr->wLength); 1828 int value = -EOPNOTSUPP; 1829 1830 /* Only Class specific requests are supposed to reach here */ 1831 if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) 1832 return -EOPNOTSUPP; 1833 1834 if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) 1835 value = setup_rq_inf(fn, cr); 1836 else 1837 dev_err(&agdev->gadget->dev, "%s:%d Error!\n", 1838 __func__, __LINE__); 1839 1840 if (value >= 0) { 1841 req->length = value; 1842 req->zero = value < w_length; 1843 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); 1844 if (value < 0) { 1845 dev_err(&agdev->gadget->dev, 1846 "%s:%d Error!\n", __func__, __LINE__); 1847 req->status = 0; 1848 } 1849 } 1850 1851 return value; 1852 } 1853 1854 static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) 1855 { 1856 return container_of(to_config_group(item), struct f_uac2_opts, 1857 func_inst.group); 1858 } 1859 1860 static void f_uac2_attr_release(struct config_item *item) 1861 { 1862 struct f_uac2_opts *opts = to_f_uac2_opts(item); 1863 1864 usb_put_function_instance(&opts->func_inst); 1865 } 1866 1867 static struct configfs_item_operations f_uac2_item_ops = { 1868 .release = f_uac2_attr_release, 1869 }; 1870 1871 #define uac2_kstrtou8 kstrtou8 1872 #define uac2_kstrtou32 kstrtou32 1873 #define uac2_kstrtos16 kstrtos16 1874 #define uac2_kstrtobool(s, base, res) kstrtobool((s), (res)) 1875 1876 static const char *u8_fmt = "%u\n"; 1877 static const char *u32_fmt = "%u\n"; 1878 static const char *s16_fmt = "%hd\n"; 1879 static const char *bool_fmt = "%u\n"; 1880 1881 #define UAC2_ATTRIBUTE(type, name) \ 1882 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1883 char *page) \ 1884 { \ 1885 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1886 int result; \ 1887 \ 1888 mutex_lock(&opts->lock); \ 1889 result = sprintf(page, type##_fmt, opts->name); \ 1890 mutex_unlock(&opts->lock); \ 1891 \ 1892 return result; \ 1893 } \ 1894 \ 1895 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1896 const char *page, size_t len) \ 1897 { \ 1898 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1899 int ret; \ 1900 type num; \ 1901 \ 1902 mutex_lock(&opts->lock); \ 1903 if (opts->refcnt) { \ 1904 ret = -EBUSY; \ 1905 goto end; \ 1906 } \ 1907 \ 1908 ret = uac2_kstrto##type(page, 0, &num); \ 1909 if (ret) \ 1910 goto end; \ 1911 \ 1912 opts->name = num; \ 1913 ret = len; \ 1914 \ 1915 end: \ 1916 mutex_unlock(&opts->lock); \ 1917 return ret; \ 1918 } \ 1919 \ 1920 CONFIGFS_ATTR(f_uac2_opts_, name) 1921 1922 #define UAC2_ATTRIBUTE_SYNC(name) \ 1923 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1924 char *page) \ 1925 { \ 1926 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1927 int result; \ 1928 char *str; \ 1929 \ 1930 mutex_lock(&opts->lock); \ 1931 switch (opts->name) { \ 1932 case USB_ENDPOINT_SYNC_ASYNC: \ 1933 str = "async"; \ 1934 break; \ 1935 case USB_ENDPOINT_SYNC_ADAPTIVE: \ 1936 str = "adaptive"; \ 1937 break; \ 1938 default: \ 1939 str = "unknown"; \ 1940 break; \ 1941 } \ 1942 result = sprintf(page, "%s\n", str); \ 1943 mutex_unlock(&opts->lock); \ 1944 \ 1945 return result; \ 1946 } \ 1947 \ 1948 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1949 const char *page, size_t len) \ 1950 { \ 1951 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1952 int ret = 0; \ 1953 \ 1954 mutex_lock(&opts->lock); \ 1955 if (opts->refcnt) { \ 1956 ret = -EBUSY; \ 1957 goto end; \ 1958 } \ 1959 \ 1960 if (!strncmp(page, "async", 5)) \ 1961 opts->name = USB_ENDPOINT_SYNC_ASYNC; \ 1962 else if (!strncmp(page, "adaptive", 8)) \ 1963 opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \ 1964 else { \ 1965 ret = -EINVAL; \ 1966 goto end; \ 1967 } \ 1968 \ 1969 ret = len; \ 1970 \ 1971 end: \ 1972 mutex_unlock(&opts->lock); \ 1973 return ret; \ 1974 } \ 1975 \ 1976 CONFIGFS_ATTR(f_uac2_opts_, name) 1977 1978 #define UAC2_RATE_ATTRIBUTE(name) \ 1979 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1980 char *page) \ 1981 { \ 1982 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1983 int result = 0; \ 1984 int i; \ 1985 \ 1986 mutex_lock(&opts->lock); \ 1987 page[0] = '\0'; \ 1988 for (i = 0; i < UAC_MAX_RATES; i++) { \ 1989 if (opts->name##s[i] == 0) \ 1990 break; \ 1991 result += sprintf(page + strlen(page), "%u,", \ 1992 opts->name##s[i]); \ 1993 } \ 1994 if (strlen(page) > 0) \ 1995 page[strlen(page) - 1] = '\n'; \ 1996 mutex_unlock(&opts->lock); \ 1997 \ 1998 return result; \ 1999 } \ 2000 \ 2001 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 2002 const char *page, size_t len) \ 2003 { \ 2004 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2005 char *split_page = NULL; \ 2006 int ret = -EINVAL; \ 2007 char *token; \ 2008 u32 num; \ 2009 int i; \ 2010 \ 2011 mutex_lock(&opts->lock); \ 2012 if (opts->refcnt) { \ 2013 ret = -EBUSY; \ 2014 goto end; \ 2015 } \ 2016 \ 2017 i = 0; \ 2018 memset(opts->name##s, 0x00, sizeof(opts->name##s)); \ 2019 split_page = kstrdup(page, GFP_KERNEL); \ 2020 while ((token = strsep(&split_page, ",")) != NULL) { \ 2021 ret = kstrtou32(token, 0, &num); \ 2022 if (ret) \ 2023 goto end; \ 2024 \ 2025 opts->name##s[i++] = num; \ 2026 ret = len; \ 2027 }; \ 2028 \ 2029 end: \ 2030 kfree(split_page); \ 2031 mutex_unlock(&opts->lock); \ 2032 return ret; \ 2033 } \ 2034 \ 2035 CONFIGFS_ATTR(f_uac2_opts_, name) 2036 2037 #define UAC2_ATTRIBUTE_STRING(name) \ 2038 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 2039 char *page) \ 2040 { \ 2041 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2042 int result; \ 2043 \ 2044 mutex_lock(&opts->lock); \ 2045 result = snprintf(page, sizeof(opts->name), "%s", opts->name); \ 2046 mutex_unlock(&opts->lock); \ 2047 \ 2048 return result; \ 2049 } \ 2050 \ 2051 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 2052 const char *page, size_t len) \ 2053 { \ 2054 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2055 int ret = 0; \ 2056 \ 2057 mutex_lock(&opts->lock); \ 2058 if (opts->refcnt) { \ 2059 ret = -EBUSY; \ 2060 goto end; \ 2061 } \ 2062 \ 2063 ret = snprintf(opts->name, min(sizeof(opts->name), len), \ 2064 "%s", page); \ 2065 \ 2066 end: \ 2067 mutex_unlock(&opts->lock); \ 2068 return ret; \ 2069 } \ 2070 \ 2071 CONFIGFS_ATTR(f_uac2_opts_, name) 2072 2073 UAC2_ATTRIBUTE(u32, p_chmask); 2074 UAC2_RATE_ATTRIBUTE(p_srate); 2075 UAC2_ATTRIBUTE(u32, p_ssize); 2076 UAC2_ATTRIBUTE(u8, p_hs_bint); 2077 UAC2_ATTRIBUTE(u32, c_chmask); 2078 UAC2_RATE_ATTRIBUTE(c_srate); 2079 UAC2_ATTRIBUTE_SYNC(c_sync); 2080 UAC2_ATTRIBUTE(u32, c_ssize); 2081 UAC2_ATTRIBUTE(u8, c_hs_bint); 2082 UAC2_ATTRIBUTE(u32, req_number); 2083 2084 UAC2_ATTRIBUTE(bool, p_mute_present); 2085 UAC2_ATTRIBUTE(bool, p_volume_present); 2086 UAC2_ATTRIBUTE(s16, p_volume_min); 2087 UAC2_ATTRIBUTE(s16, p_volume_max); 2088 UAC2_ATTRIBUTE(s16, p_volume_res); 2089 2090 UAC2_ATTRIBUTE(bool, c_mute_present); 2091 UAC2_ATTRIBUTE(bool, c_volume_present); 2092 UAC2_ATTRIBUTE(s16, c_volume_min); 2093 UAC2_ATTRIBUTE(s16, c_volume_max); 2094 UAC2_ATTRIBUTE(s16, c_volume_res); 2095 UAC2_ATTRIBUTE(u32, fb_max); 2096 UAC2_ATTRIBUTE_STRING(function_name); 2097 2098 static struct configfs_attribute *f_uac2_attrs[] = { 2099 &f_uac2_opts_attr_p_chmask, 2100 &f_uac2_opts_attr_p_srate, 2101 &f_uac2_opts_attr_p_ssize, 2102 &f_uac2_opts_attr_p_hs_bint, 2103 &f_uac2_opts_attr_c_chmask, 2104 &f_uac2_opts_attr_c_srate, 2105 &f_uac2_opts_attr_c_ssize, 2106 &f_uac2_opts_attr_c_hs_bint, 2107 &f_uac2_opts_attr_c_sync, 2108 &f_uac2_opts_attr_req_number, 2109 &f_uac2_opts_attr_fb_max, 2110 2111 &f_uac2_opts_attr_p_mute_present, 2112 &f_uac2_opts_attr_p_volume_present, 2113 &f_uac2_opts_attr_p_volume_min, 2114 &f_uac2_opts_attr_p_volume_max, 2115 &f_uac2_opts_attr_p_volume_res, 2116 2117 &f_uac2_opts_attr_c_mute_present, 2118 &f_uac2_opts_attr_c_volume_present, 2119 &f_uac2_opts_attr_c_volume_min, 2120 &f_uac2_opts_attr_c_volume_max, 2121 &f_uac2_opts_attr_c_volume_res, 2122 2123 &f_uac2_opts_attr_function_name, 2124 2125 NULL, 2126 }; 2127 2128 static const struct config_item_type f_uac2_func_type = { 2129 .ct_item_ops = &f_uac2_item_ops, 2130 .ct_attrs = f_uac2_attrs, 2131 .ct_owner = THIS_MODULE, 2132 }; 2133 2134 static void afunc_free_inst(struct usb_function_instance *f) 2135 { 2136 struct f_uac2_opts *opts; 2137 2138 opts = container_of(f, struct f_uac2_opts, func_inst); 2139 kfree(opts); 2140 } 2141 2142 static struct usb_function_instance *afunc_alloc_inst(void) 2143 { 2144 struct f_uac2_opts *opts; 2145 2146 opts = kzalloc(sizeof(*opts), GFP_KERNEL); 2147 if (!opts) 2148 return ERR_PTR(-ENOMEM); 2149 2150 mutex_init(&opts->lock); 2151 opts->func_inst.free_func_inst = afunc_free_inst; 2152 2153 config_group_init_type_name(&opts->func_inst.group, "", 2154 &f_uac2_func_type); 2155 2156 opts->p_chmask = UAC2_DEF_PCHMASK; 2157 opts->p_srates[0] = UAC2_DEF_PSRATE; 2158 opts->p_ssize = UAC2_DEF_PSSIZE; 2159 opts->p_hs_bint = UAC2_DEF_PHSBINT; 2160 opts->c_chmask = UAC2_DEF_CCHMASK; 2161 opts->c_srates[0] = UAC2_DEF_CSRATE; 2162 opts->c_ssize = UAC2_DEF_CSSIZE; 2163 opts->c_hs_bint = UAC2_DEF_CHSBINT; 2164 opts->c_sync = UAC2_DEF_CSYNC; 2165 2166 opts->p_mute_present = UAC2_DEF_MUTE_PRESENT; 2167 opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT; 2168 opts->p_volume_min = UAC2_DEF_MIN_DB; 2169 opts->p_volume_max = UAC2_DEF_MAX_DB; 2170 opts->p_volume_res = UAC2_DEF_RES_DB; 2171 2172 opts->c_mute_present = UAC2_DEF_MUTE_PRESENT; 2173 opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT; 2174 opts->c_volume_min = UAC2_DEF_MIN_DB; 2175 opts->c_volume_max = UAC2_DEF_MAX_DB; 2176 opts->c_volume_res = UAC2_DEF_RES_DB; 2177 2178 opts->req_number = UAC2_DEF_REQ_NUM; 2179 opts->fb_max = FBACK_FAST_MAX; 2180 2181 snprintf(opts->function_name, sizeof(opts->function_name), "Source/Sink"); 2182 2183 return &opts->func_inst; 2184 } 2185 2186 static void afunc_free(struct usb_function *f) 2187 { 2188 struct g_audio *agdev; 2189 struct f_uac2_opts *opts; 2190 2191 agdev = func_to_g_audio(f); 2192 opts = container_of(f->fi, struct f_uac2_opts, func_inst); 2193 kfree(agdev); 2194 mutex_lock(&opts->lock); 2195 --opts->refcnt; 2196 mutex_unlock(&opts->lock); 2197 } 2198 2199 static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) 2200 { 2201 struct g_audio *agdev = func_to_g_audio(f); 2202 2203 g_audio_cleanup(agdev); 2204 usb_free_all_descriptors(f); 2205 2206 agdev->gadget = NULL; 2207 2208 kfree(out_feature_unit_desc); 2209 out_feature_unit_desc = NULL; 2210 kfree(in_feature_unit_desc); 2211 in_feature_unit_desc = NULL; 2212 } 2213 2214 static struct usb_function *afunc_alloc(struct usb_function_instance *fi) 2215 { 2216 struct f_uac2 *uac2; 2217 struct f_uac2_opts *opts; 2218 2219 uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); 2220 if (uac2 == NULL) 2221 return ERR_PTR(-ENOMEM); 2222 2223 opts = container_of(fi, struct f_uac2_opts, func_inst); 2224 mutex_lock(&opts->lock); 2225 ++opts->refcnt; 2226 mutex_unlock(&opts->lock); 2227 2228 uac2->g_audio.func.name = "uac2_func"; 2229 uac2->g_audio.func.bind = afunc_bind; 2230 uac2->g_audio.func.unbind = afunc_unbind; 2231 uac2->g_audio.func.set_alt = afunc_set_alt; 2232 uac2->g_audio.func.get_alt = afunc_get_alt; 2233 uac2->g_audio.func.disable = afunc_disable; 2234 uac2->g_audio.func.suspend = afunc_suspend; 2235 uac2->g_audio.func.setup = afunc_setup; 2236 uac2->g_audio.func.free_func = afunc_free; 2237 2238 return &uac2->g_audio.func; 2239 } 2240 2241 DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); 2242 MODULE_LICENSE("GPL"); 2243 MODULE_AUTHOR("Yadwinder Singh"); 2244 MODULE_AUTHOR("Jaswinder Singh"); 2245 MODULE_AUTHOR("Ruslan Bilovol"); 2246