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 std_ac_if_desc.bNumEndpoints = 0; 1180 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) { 1181 uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc); 1182 if (!uac2->int_ep) { 1183 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1184 ret = -ENODEV; 1185 goto err_free_fu; 1186 } 1187 1188 std_ac_if_desc.bNumEndpoints = 1; 1189 } 1190 1191 hs_epin_desc.bInterval = uac2_opts->p_hs_bint; 1192 ss_epin_desc.bInterval = uac2_opts->p_hs_bint; 1193 hs_epout_desc.bInterval = uac2_opts->c_hs_bint; 1194 ss_epout_desc.bInterval = uac2_opts->c_hs_bint; 1195 1196 /* Calculate wMaxPacketSize according to audio bandwidth */ 1197 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epin_desc, 1198 USB_SPEED_FULL, true); 1199 if (ret < 0) { 1200 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1201 return ret; 1202 } 1203 1204 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &fs_epout_desc, 1205 USB_SPEED_FULL, false); 1206 if (ret < 0) { 1207 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1208 return ret; 1209 } 1210 1211 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epin_desc, 1212 USB_SPEED_HIGH, true); 1213 if (ret < 0) { 1214 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1215 return ret; 1216 } 1217 1218 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &hs_epout_desc, 1219 USB_SPEED_HIGH, false); 1220 if (ret < 0) { 1221 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1222 return ret; 1223 } 1224 1225 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epin_desc, 1226 USB_SPEED_SUPER, true); 1227 if (ret < 0) { 1228 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1229 return ret; 1230 } 1231 1232 ret = set_ep_max_packet_size_bint(dev, uac2_opts, &ss_epout_desc, 1233 USB_SPEED_SUPER, false); 1234 if (ret < 0) { 1235 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1236 return ret; 1237 } 1238 1239 if (EPOUT_EN(uac2_opts)) { 1240 agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); 1241 if (!agdev->out_ep) { 1242 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1243 ret = -ENODEV; 1244 goto err_free_fu; 1245 } 1246 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1247 agdev->in_ep_fback = usb_ep_autoconfig(gadget, 1248 &fs_epin_fback_desc); 1249 if (!agdev->in_ep_fback) { 1250 dev_err(dev, "%s:%d Error!\n", 1251 __func__, __LINE__); 1252 ret = -ENODEV; 1253 goto err_free_fu; 1254 } 1255 } 1256 } 1257 1258 if (EPIN_EN(uac2_opts)) { 1259 agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); 1260 if (!agdev->in_ep) { 1261 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1262 ret = -ENODEV; 1263 goto err_free_fu; 1264 } 1265 } 1266 1267 agdev->in_ep_maxpsize = max_t(u16, 1268 le16_to_cpu(fs_epin_desc.wMaxPacketSize), 1269 le16_to_cpu(hs_epin_desc.wMaxPacketSize)); 1270 agdev->out_ep_maxpsize = max_t(u16, 1271 le16_to_cpu(fs_epout_desc.wMaxPacketSize), 1272 le16_to_cpu(hs_epout_desc.wMaxPacketSize)); 1273 1274 agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize, 1275 le16_to_cpu(ss_epin_desc.wMaxPacketSize)); 1276 agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize, 1277 le16_to_cpu(ss_epout_desc.wMaxPacketSize)); 1278 1279 ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize; 1280 ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize; 1281 1282 // HS and SS endpoint addresses are copied from autoconfigured FS descriptors 1283 hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1284 hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1285 hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1286 hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1287 ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1288 ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1289 ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1290 ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1291 1292 setup_descriptor(uac2_opts); 1293 1294 ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc, 1295 ss_audio_desc); 1296 if (ret) 1297 goto err_free_fu; 1298 1299 agdev->gadget = gadget; 1300 1301 agdev->params.p_chmask = uac2_opts->p_chmask; 1302 memcpy(agdev->params.p_srates, uac2_opts->p_srates, 1303 sizeof(agdev->params.p_srates)); 1304 agdev->params.p_ssize = uac2_opts->p_ssize; 1305 if (FUIN_EN(uac2_opts)) { 1306 agdev->params.p_fu.id = USB_IN_FU_ID; 1307 agdev->params.p_fu.mute_present = uac2_opts->p_mute_present; 1308 agdev->params.p_fu.volume_present = uac2_opts->p_volume_present; 1309 agdev->params.p_fu.volume_min = uac2_opts->p_volume_min; 1310 agdev->params.p_fu.volume_max = uac2_opts->p_volume_max; 1311 agdev->params.p_fu.volume_res = uac2_opts->p_volume_res; 1312 } 1313 agdev->params.c_chmask = uac2_opts->c_chmask; 1314 memcpy(agdev->params.c_srates, uac2_opts->c_srates, 1315 sizeof(agdev->params.c_srates)); 1316 agdev->params.c_ssize = uac2_opts->c_ssize; 1317 if (FUOUT_EN(uac2_opts)) { 1318 agdev->params.c_fu.id = USB_OUT_FU_ID; 1319 agdev->params.c_fu.mute_present = uac2_opts->c_mute_present; 1320 agdev->params.c_fu.volume_present = uac2_opts->c_volume_present; 1321 agdev->params.c_fu.volume_min = uac2_opts->c_volume_min; 1322 agdev->params.c_fu.volume_max = uac2_opts->c_volume_max; 1323 agdev->params.c_fu.volume_res = uac2_opts->c_volume_res; 1324 } 1325 agdev->params.req_number = uac2_opts->req_number; 1326 agdev->params.fb_max = uac2_opts->fb_max; 1327 1328 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) 1329 agdev->notify = afunc_notify; 1330 1331 ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); 1332 if (ret) 1333 goto err_free_descs; 1334 1335 return 0; 1336 1337 err_free_descs: 1338 usb_free_all_descriptors(fn); 1339 agdev->gadget = NULL; 1340 err_free_fu: 1341 kfree(out_feature_unit_desc); 1342 out_feature_unit_desc = NULL; 1343 kfree(in_feature_unit_desc); 1344 in_feature_unit_desc = NULL; 1345 return ret; 1346 } 1347 1348 static void 1349 afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req) 1350 { 1351 struct g_audio *agdev = req->context; 1352 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1353 1354 atomic_dec(&uac2->int_count); 1355 kfree(req->buf); 1356 usb_ep_free_request(_ep, req); 1357 } 1358 1359 static int 1360 afunc_notify(struct g_audio *agdev, int unit_id, int cs) 1361 { 1362 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1363 struct usb_request *req; 1364 struct uac2_interrupt_data_msg *msg; 1365 u16 w_index, w_value; 1366 int ret; 1367 1368 if (!uac2->int_ep->enabled) 1369 return 0; 1370 1371 if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) { 1372 atomic_dec(&uac2->int_count); 1373 return 0; 1374 } 1375 1376 req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC); 1377 if (req == NULL) { 1378 ret = -ENOMEM; 1379 goto err_dec_int_count; 1380 } 1381 1382 msg = kzalloc(sizeof(*msg), GFP_ATOMIC); 1383 if (msg == NULL) { 1384 ret = -ENOMEM; 1385 goto err_free_request; 1386 } 1387 1388 w_index = unit_id << 8 | uac2->ac_intf; 1389 w_value = cs << 8; 1390 1391 msg->bInfo = 0; /* Non-vendor, interface interrupt */ 1392 msg->bAttribute = UAC2_CS_CUR; 1393 msg->wIndex = cpu_to_le16(w_index); 1394 msg->wValue = cpu_to_le16(w_value); 1395 1396 req->length = sizeof(*msg); 1397 req->buf = msg; 1398 req->context = agdev; 1399 req->complete = afunc_notify_complete; 1400 1401 ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC); 1402 1403 if (ret) 1404 goto err_free_msg; 1405 1406 return 0; 1407 1408 err_free_msg: 1409 kfree(msg); 1410 err_free_request: 1411 usb_ep_free_request(uac2->int_ep, req); 1412 err_dec_int_count: 1413 atomic_dec(&uac2->int_count); 1414 1415 return ret; 1416 } 1417 1418 static int 1419 afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) 1420 { 1421 struct usb_composite_dev *cdev = fn->config->cdev; 1422 struct f_uac2 *uac2 = func_to_uac2(fn); 1423 struct g_audio *agdev = func_to_g_audio(fn); 1424 struct usb_gadget *gadget = cdev->gadget; 1425 struct device *dev = &gadget->dev; 1426 int ret = 0; 1427 1428 /* No i/f has more than 2 alt settings */ 1429 if (alt > 1) { 1430 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1431 return -EINVAL; 1432 } 1433 1434 if (intf == uac2->ac_intf) { 1435 /* Control I/f has only 1 AltSetting - 0 */ 1436 if (alt) { 1437 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1438 return -EINVAL; 1439 } 1440 1441 /* restart interrupt endpoint */ 1442 if (uac2->int_ep) { 1443 usb_ep_disable(uac2->int_ep); 1444 config_ep_by_speed(gadget, &agdev->func, uac2->int_ep); 1445 usb_ep_enable(uac2->int_ep); 1446 } 1447 1448 return 0; 1449 } 1450 1451 if (intf == uac2->as_out_intf) { 1452 uac2->as_out_alt = alt; 1453 1454 if (alt) 1455 ret = u_audio_start_capture(&uac2->g_audio); 1456 else 1457 u_audio_stop_capture(&uac2->g_audio); 1458 } else if (intf == uac2->as_in_intf) { 1459 uac2->as_in_alt = alt; 1460 1461 if (alt) 1462 ret = u_audio_start_playback(&uac2->g_audio); 1463 else 1464 u_audio_stop_playback(&uac2->g_audio); 1465 } else { 1466 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1467 return -EINVAL; 1468 } 1469 1470 return ret; 1471 } 1472 1473 static int 1474 afunc_get_alt(struct usb_function *fn, unsigned intf) 1475 { 1476 struct f_uac2 *uac2 = func_to_uac2(fn); 1477 struct g_audio *agdev = func_to_g_audio(fn); 1478 1479 if (intf == uac2->ac_intf) 1480 return uac2->ac_alt; 1481 else if (intf == uac2->as_out_intf) 1482 return uac2->as_out_alt; 1483 else if (intf == uac2->as_in_intf) 1484 return uac2->as_in_alt; 1485 else 1486 dev_err(&agdev->gadget->dev, 1487 "%s:%d Invalid Interface %d!\n", 1488 __func__, __LINE__, intf); 1489 1490 return -EINVAL; 1491 } 1492 1493 static void 1494 afunc_disable(struct usb_function *fn) 1495 { 1496 struct f_uac2 *uac2 = func_to_uac2(fn); 1497 1498 uac2->as_in_alt = 0; 1499 uac2->as_out_alt = 0; 1500 u_audio_stop_capture(&uac2->g_audio); 1501 u_audio_stop_playback(&uac2->g_audio); 1502 if (uac2->int_ep) 1503 usb_ep_disable(uac2->int_ep); 1504 } 1505 1506 static void 1507 afunc_suspend(struct usb_function *fn) 1508 { 1509 struct f_uac2 *uac2 = func_to_uac2(fn); 1510 1511 u_audio_suspend(&uac2->g_audio); 1512 } 1513 1514 static int 1515 in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1516 { 1517 struct usb_request *req = fn->config->cdev->req; 1518 struct g_audio *agdev = func_to_g_audio(fn); 1519 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1520 u16 w_length = le16_to_cpu(cr->wLength); 1521 u16 w_index = le16_to_cpu(cr->wIndex); 1522 u16 w_value = le16_to_cpu(cr->wValue); 1523 u8 entity_id = (w_index >> 8) & 0xff; 1524 u8 control_selector = w_value >> 8; 1525 int value = -EOPNOTSUPP; 1526 u32 p_srate, c_srate; 1527 1528 u_audio_get_playback_srate(agdev, &p_srate); 1529 u_audio_get_capture_srate(agdev, &c_srate); 1530 1531 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1532 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1533 struct cntrl_cur_lay3 c; 1534 1535 memset(&c, 0, sizeof(struct cntrl_cur_lay3)); 1536 1537 if (entity_id == USB_IN_CLK_ID) 1538 c.dCUR = cpu_to_le32(p_srate); 1539 else if (entity_id == USB_OUT_CLK_ID) 1540 c.dCUR = cpu_to_le32(c_srate); 1541 1542 value = min_t(unsigned int, w_length, sizeof(c)); 1543 memcpy(req->buf, &c, value); 1544 } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { 1545 *(u8 *)req->buf = 1; 1546 value = min_t(unsigned int, w_length, 1); 1547 } else { 1548 dev_err(&agdev->gadget->dev, 1549 "%s:%d control_selector=%d TODO!\n", 1550 __func__, __LINE__, control_selector); 1551 } 1552 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1553 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1554 unsigned int is_playback = 0; 1555 1556 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1557 is_playback = 1; 1558 1559 if (control_selector == UAC_FU_MUTE) { 1560 unsigned int mute; 1561 1562 u_audio_get_mute(agdev, is_playback, &mute); 1563 1564 *(u8 *)req->buf = mute; 1565 value = min_t(unsigned int, w_length, 1); 1566 } else if (control_selector == UAC_FU_VOLUME) { 1567 struct cntrl_cur_lay2 c; 1568 s16 volume; 1569 1570 memset(&c, 0, sizeof(struct cntrl_cur_lay2)); 1571 1572 u_audio_get_volume(agdev, is_playback, &volume); 1573 c.wCUR = cpu_to_le16(volume); 1574 1575 value = min_t(unsigned int, w_length, sizeof(c)); 1576 memcpy(req->buf, &c, value); 1577 } else { 1578 dev_err(&agdev->gadget->dev, 1579 "%s:%d control_selector=%d TODO!\n", 1580 __func__, __LINE__, control_selector); 1581 } 1582 } else { 1583 dev_err(&agdev->gadget->dev, 1584 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1585 __func__, __LINE__, entity_id, control_selector); 1586 } 1587 1588 return value; 1589 } 1590 1591 static int 1592 in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1593 { 1594 struct usb_request *req = fn->config->cdev->req; 1595 struct g_audio *agdev = func_to_g_audio(fn); 1596 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1597 u16 w_length = le16_to_cpu(cr->wLength); 1598 u16 w_index = le16_to_cpu(cr->wIndex); 1599 u16 w_value = le16_to_cpu(cr->wValue); 1600 u8 entity_id = (w_index >> 8) & 0xff; 1601 u8 control_selector = w_value >> 8; 1602 int value = -EOPNOTSUPP; 1603 1604 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1605 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1606 struct cntrl_ranges_lay3_srates rs; 1607 int i; 1608 int wNumSubRanges = 0; 1609 int srate; 1610 int *srates; 1611 1612 if (entity_id == USB_IN_CLK_ID) 1613 srates = opts->p_srates; 1614 else if (entity_id == USB_OUT_CLK_ID) 1615 srates = opts->c_srates; 1616 else 1617 return -EOPNOTSUPP; 1618 for (i = 0; i < UAC_MAX_RATES; i++) { 1619 srate = srates[i]; 1620 if (srate == 0) 1621 break; 1622 1623 rs.r[wNumSubRanges].dMIN = cpu_to_le32(srate); 1624 rs.r[wNumSubRanges].dMAX = cpu_to_le32(srate); 1625 rs.r[wNumSubRanges].dRES = 0; 1626 wNumSubRanges++; 1627 dev_dbg(&agdev->gadget->dev, 1628 "%s(): clk %d: rate ID %d: %d\n", 1629 __func__, entity_id, wNumSubRanges, srate); 1630 } 1631 rs.wNumSubRanges = cpu_to_le16(wNumSubRanges); 1632 value = min_t(unsigned int, w_length, ranges_lay3_size(rs)); 1633 dev_dbg(&agdev->gadget->dev, "%s(): sending %d rates, size %d\n", 1634 __func__, rs.wNumSubRanges, value); 1635 memcpy(req->buf, &rs, value); 1636 } else { 1637 dev_err(&agdev->gadget->dev, 1638 "%s:%d control_selector=%d TODO!\n", 1639 __func__, __LINE__, control_selector); 1640 } 1641 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1642 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1643 unsigned int is_playback = 0; 1644 1645 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1646 is_playback = 1; 1647 1648 if (control_selector == UAC_FU_VOLUME) { 1649 struct cntrl_range_lay2 r; 1650 s16 max_db, min_db, res_db; 1651 1652 if (is_playback) { 1653 max_db = opts->p_volume_max; 1654 min_db = opts->p_volume_min; 1655 res_db = opts->p_volume_res; 1656 } else { 1657 max_db = opts->c_volume_max; 1658 min_db = opts->c_volume_min; 1659 res_db = opts->c_volume_res; 1660 } 1661 1662 r.wMAX = cpu_to_le16(max_db); 1663 r.wMIN = cpu_to_le16(min_db); 1664 r.wRES = cpu_to_le16(res_db); 1665 r.wNumSubRanges = cpu_to_le16(1); 1666 1667 value = min_t(unsigned int, w_length, sizeof(r)); 1668 memcpy(req->buf, &r, value); 1669 } else { 1670 dev_err(&agdev->gadget->dev, 1671 "%s:%d control_selector=%d TODO!\n", 1672 __func__, __LINE__, control_selector); 1673 } 1674 } else { 1675 dev_err(&agdev->gadget->dev, 1676 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1677 __func__, __LINE__, entity_id, control_selector); 1678 } 1679 1680 return value; 1681 } 1682 1683 static int 1684 ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1685 { 1686 if (cr->bRequest == UAC2_CS_CUR) 1687 return in_rq_cur(fn, cr); 1688 else if (cr->bRequest == UAC2_CS_RANGE) 1689 return in_rq_range(fn, cr); 1690 else 1691 return -EOPNOTSUPP; 1692 } 1693 1694 static void uac2_cs_control_sam_freq(struct usb_ep *ep, struct usb_request *req) 1695 { 1696 struct usb_function *fn = ep->driver_data; 1697 struct g_audio *agdev = func_to_g_audio(fn); 1698 struct f_uac2 *uac2 = func_to_uac2(fn); 1699 u32 val; 1700 1701 if (req->actual != 4) 1702 return; 1703 1704 val = le32_to_cpu(*((__le32 *)req->buf)); 1705 dev_dbg(&agdev->gadget->dev, "%s val: %d.\n", __func__, val); 1706 if (uac2->clock_id == USB_IN_CLK_ID) { 1707 u_audio_set_playback_srate(agdev, val); 1708 } else if (uac2->clock_id == USB_OUT_CLK_ID) { 1709 u_audio_set_capture_srate(agdev, val); 1710 } 1711 } 1712 1713 static void 1714 out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) 1715 { 1716 struct g_audio *agdev = req->context; 1717 struct usb_composite_dev *cdev = agdev->func.config->cdev; 1718 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1719 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1720 struct usb_ctrlrequest *cr = &uac2->setup_cr; 1721 u16 w_index = le16_to_cpu(cr->wIndex); 1722 u16 w_value = le16_to_cpu(cr->wValue); 1723 u8 entity_id = (w_index >> 8) & 0xff; 1724 u8 control_selector = w_value >> 8; 1725 1726 if (req->status != 0) { 1727 dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status); 1728 return; 1729 } 1730 1731 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1732 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1733 unsigned int is_playback = 0; 1734 1735 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1736 is_playback = 1; 1737 1738 if (control_selector == UAC_FU_MUTE) { 1739 u8 mute = *(u8 *)req->buf; 1740 1741 u_audio_set_mute(agdev, is_playback, mute); 1742 1743 return; 1744 } else if (control_selector == UAC_FU_VOLUME) { 1745 struct cntrl_cur_lay2 *c = req->buf; 1746 s16 volume; 1747 1748 volume = le16_to_cpu(c->wCUR); 1749 u_audio_set_volume(agdev, is_playback, volume); 1750 1751 return; 1752 } else { 1753 dev_err(&agdev->gadget->dev, 1754 "%s:%d control_selector=%d TODO!\n", 1755 __func__, __LINE__, control_selector); 1756 usb_ep_set_halt(ep); 1757 } 1758 } 1759 } 1760 1761 static int 1762 out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1763 { 1764 struct usb_composite_dev *cdev = fn->config->cdev; 1765 struct usb_request *req = fn->config->cdev->req; 1766 struct g_audio *agdev = func_to_g_audio(fn); 1767 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1768 struct f_uac2 *uac2 = func_to_uac2(fn); 1769 u16 w_length = le16_to_cpu(cr->wLength); 1770 u16 w_index = le16_to_cpu(cr->wIndex); 1771 u16 w_value = le16_to_cpu(cr->wValue); 1772 u8 entity_id = (w_index >> 8) & 0xff; 1773 u8 control_selector = w_value >> 8; 1774 u8 clock_id = w_index >> 8; 1775 1776 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1777 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1778 dev_dbg(&agdev->gadget->dev, 1779 "control_selector UAC2_CS_CONTROL_SAM_FREQ, clock: %d\n", clock_id); 1780 cdev->gadget->ep0->driver_data = fn; 1781 uac2->clock_id = clock_id; 1782 req->complete = uac2_cs_control_sam_freq; 1783 return w_length; 1784 } 1785 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1786 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1787 memcpy(&uac2->setup_cr, cr, sizeof(*cr)); 1788 req->context = agdev; 1789 req->complete = out_rq_cur_complete; 1790 1791 return w_length; 1792 } else { 1793 dev_err(&agdev->gadget->dev, 1794 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1795 __func__, __LINE__, entity_id, control_selector); 1796 } 1797 return -EOPNOTSUPP; 1798 } 1799 1800 static int 1801 setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1802 { 1803 struct f_uac2 *uac2 = func_to_uac2(fn); 1804 struct g_audio *agdev = func_to_g_audio(fn); 1805 u16 w_index = le16_to_cpu(cr->wIndex); 1806 u8 intf = w_index & 0xff; 1807 1808 if (intf != uac2->ac_intf) { 1809 dev_err(&agdev->gadget->dev, 1810 "%s:%d Error!\n", __func__, __LINE__); 1811 return -EOPNOTSUPP; 1812 } 1813 1814 if (cr->bRequestType & USB_DIR_IN) 1815 return ac_rq_in(fn, cr); 1816 else if (cr->bRequest == UAC2_CS_CUR) 1817 return out_rq_cur(fn, cr); 1818 1819 return -EOPNOTSUPP; 1820 } 1821 1822 static int 1823 afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1824 { 1825 struct usb_composite_dev *cdev = fn->config->cdev; 1826 struct g_audio *agdev = func_to_g_audio(fn); 1827 struct usb_request *req = cdev->req; 1828 u16 w_length = le16_to_cpu(cr->wLength); 1829 int value = -EOPNOTSUPP; 1830 1831 /* Only Class specific requests are supposed to reach here */ 1832 if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) 1833 return -EOPNOTSUPP; 1834 1835 if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) 1836 value = setup_rq_inf(fn, cr); 1837 else 1838 dev_err(&agdev->gadget->dev, "%s:%d Error!\n", 1839 __func__, __LINE__); 1840 1841 if (value >= 0) { 1842 req->length = value; 1843 req->zero = value < w_length; 1844 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); 1845 if (value < 0) { 1846 dev_err(&agdev->gadget->dev, 1847 "%s:%d Error!\n", __func__, __LINE__); 1848 req->status = 0; 1849 } 1850 } 1851 1852 return value; 1853 } 1854 1855 static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) 1856 { 1857 return container_of(to_config_group(item), struct f_uac2_opts, 1858 func_inst.group); 1859 } 1860 1861 static void f_uac2_attr_release(struct config_item *item) 1862 { 1863 struct f_uac2_opts *opts = to_f_uac2_opts(item); 1864 1865 usb_put_function_instance(&opts->func_inst); 1866 } 1867 1868 static struct configfs_item_operations f_uac2_item_ops = { 1869 .release = f_uac2_attr_release, 1870 }; 1871 1872 #define uac2_kstrtou8 kstrtou8 1873 #define uac2_kstrtou32 kstrtou32 1874 #define uac2_kstrtos16 kstrtos16 1875 #define uac2_kstrtobool(s, base, res) kstrtobool((s), (res)) 1876 1877 static const char *u8_fmt = "%u\n"; 1878 static const char *u32_fmt = "%u\n"; 1879 static const char *s16_fmt = "%hd\n"; 1880 static const char *bool_fmt = "%u\n"; 1881 1882 #define UAC2_ATTRIBUTE(type, name) \ 1883 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1884 char *page) \ 1885 { \ 1886 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1887 int result; \ 1888 \ 1889 mutex_lock(&opts->lock); \ 1890 result = sprintf(page, type##_fmt, opts->name); \ 1891 mutex_unlock(&opts->lock); \ 1892 \ 1893 return result; \ 1894 } \ 1895 \ 1896 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1897 const char *page, size_t len) \ 1898 { \ 1899 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1900 int ret; \ 1901 type num; \ 1902 \ 1903 mutex_lock(&opts->lock); \ 1904 if (opts->refcnt) { \ 1905 ret = -EBUSY; \ 1906 goto end; \ 1907 } \ 1908 \ 1909 ret = uac2_kstrto##type(page, 0, &num); \ 1910 if (ret) \ 1911 goto end; \ 1912 \ 1913 opts->name = num; \ 1914 ret = len; \ 1915 \ 1916 end: \ 1917 mutex_unlock(&opts->lock); \ 1918 return ret; \ 1919 } \ 1920 \ 1921 CONFIGFS_ATTR(f_uac2_opts_, name) 1922 1923 #define UAC2_ATTRIBUTE_SYNC(name) \ 1924 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1925 char *page) \ 1926 { \ 1927 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1928 int result; \ 1929 char *str; \ 1930 \ 1931 mutex_lock(&opts->lock); \ 1932 switch (opts->name) { \ 1933 case USB_ENDPOINT_SYNC_ASYNC: \ 1934 str = "async"; \ 1935 break; \ 1936 case USB_ENDPOINT_SYNC_ADAPTIVE: \ 1937 str = "adaptive"; \ 1938 break; \ 1939 default: \ 1940 str = "unknown"; \ 1941 break; \ 1942 } \ 1943 result = sprintf(page, "%s\n", str); \ 1944 mutex_unlock(&opts->lock); \ 1945 \ 1946 return result; \ 1947 } \ 1948 \ 1949 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1950 const char *page, size_t len) \ 1951 { \ 1952 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1953 int ret = 0; \ 1954 \ 1955 mutex_lock(&opts->lock); \ 1956 if (opts->refcnt) { \ 1957 ret = -EBUSY; \ 1958 goto end; \ 1959 } \ 1960 \ 1961 if (!strncmp(page, "async", 5)) \ 1962 opts->name = USB_ENDPOINT_SYNC_ASYNC; \ 1963 else if (!strncmp(page, "adaptive", 8)) \ 1964 opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \ 1965 else { \ 1966 ret = -EINVAL; \ 1967 goto end; \ 1968 } \ 1969 \ 1970 ret = len; \ 1971 \ 1972 end: \ 1973 mutex_unlock(&opts->lock); \ 1974 return ret; \ 1975 } \ 1976 \ 1977 CONFIGFS_ATTR(f_uac2_opts_, name) 1978 1979 #define UAC2_RATE_ATTRIBUTE(name) \ 1980 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1981 char *page) \ 1982 { \ 1983 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1984 int result = 0; \ 1985 int i; \ 1986 \ 1987 mutex_lock(&opts->lock); \ 1988 page[0] = '\0'; \ 1989 for (i = 0; i < UAC_MAX_RATES; i++) { \ 1990 if (opts->name##s[i] == 0) \ 1991 break; \ 1992 result += sprintf(page + strlen(page), "%u,", \ 1993 opts->name##s[i]); \ 1994 } \ 1995 if (strlen(page) > 0) \ 1996 page[strlen(page) - 1] = '\n'; \ 1997 mutex_unlock(&opts->lock); \ 1998 \ 1999 return result; \ 2000 } \ 2001 \ 2002 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 2003 const char *page, size_t len) \ 2004 { \ 2005 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2006 char *split_page = NULL; \ 2007 int ret = -EINVAL; \ 2008 char *token; \ 2009 u32 num; \ 2010 int i; \ 2011 \ 2012 mutex_lock(&opts->lock); \ 2013 if (opts->refcnt) { \ 2014 ret = -EBUSY; \ 2015 goto end; \ 2016 } \ 2017 \ 2018 i = 0; \ 2019 memset(opts->name##s, 0x00, sizeof(opts->name##s)); \ 2020 split_page = kstrdup(page, GFP_KERNEL); \ 2021 while ((token = strsep(&split_page, ",")) != NULL) { \ 2022 ret = kstrtou32(token, 0, &num); \ 2023 if (ret) \ 2024 goto end; \ 2025 \ 2026 opts->name##s[i++] = num; \ 2027 ret = len; \ 2028 }; \ 2029 \ 2030 end: \ 2031 kfree(split_page); \ 2032 mutex_unlock(&opts->lock); \ 2033 return ret; \ 2034 } \ 2035 \ 2036 CONFIGFS_ATTR(f_uac2_opts_, name) 2037 2038 #define UAC2_ATTRIBUTE_STRING(name) \ 2039 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 2040 char *page) \ 2041 { \ 2042 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2043 int result; \ 2044 \ 2045 mutex_lock(&opts->lock); \ 2046 result = scnprintf(page, sizeof(opts->name), "%s", opts->name); \ 2047 mutex_unlock(&opts->lock); \ 2048 \ 2049 return result; \ 2050 } \ 2051 \ 2052 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 2053 const char *page, size_t len) \ 2054 { \ 2055 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 2056 int ret = len; \ 2057 \ 2058 mutex_lock(&opts->lock); \ 2059 if (opts->refcnt) { \ 2060 ret = -EBUSY; \ 2061 goto end; \ 2062 } \ 2063 \ 2064 if (len && page[len - 1] == '\n') \ 2065 len--; \ 2066 \ 2067 scnprintf(opts->name, min(sizeof(opts->name), len + 1), \ 2068 "%s", page); \ 2069 \ 2070 end: \ 2071 mutex_unlock(&opts->lock); \ 2072 return ret; \ 2073 } \ 2074 \ 2075 CONFIGFS_ATTR(f_uac2_opts_, name) 2076 2077 UAC2_ATTRIBUTE(u32, p_chmask); 2078 UAC2_RATE_ATTRIBUTE(p_srate); 2079 UAC2_ATTRIBUTE(u32, p_ssize); 2080 UAC2_ATTRIBUTE(u8, p_hs_bint); 2081 UAC2_ATTRIBUTE(u32, c_chmask); 2082 UAC2_RATE_ATTRIBUTE(c_srate); 2083 UAC2_ATTRIBUTE_SYNC(c_sync); 2084 UAC2_ATTRIBUTE(u32, c_ssize); 2085 UAC2_ATTRIBUTE(u8, c_hs_bint); 2086 UAC2_ATTRIBUTE(u32, req_number); 2087 2088 UAC2_ATTRIBUTE(bool, p_mute_present); 2089 UAC2_ATTRIBUTE(bool, p_volume_present); 2090 UAC2_ATTRIBUTE(s16, p_volume_min); 2091 UAC2_ATTRIBUTE(s16, p_volume_max); 2092 UAC2_ATTRIBUTE(s16, p_volume_res); 2093 2094 UAC2_ATTRIBUTE(bool, c_mute_present); 2095 UAC2_ATTRIBUTE(bool, c_volume_present); 2096 UAC2_ATTRIBUTE(s16, c_volume_min); 2097 UAC2_ATTRIBUTE(s16, c_volume_max); 2098 UAC2_ATTRIBUTE(s16, c_volume_res); 2099 UAC2_ATTRIBUTE(u32, fb_max); 2100 UAC2_ATTRIBUTE_STRING(function_name); 2101 2102 static struct configfs_attribute *f_uac2_attrs[] = { 2103 &f_uac2_opts_attr_p_chmask, 2104 &f_uac2_opts_attr_p_srate, 2105 &f_uac2_opts_attr_p_ssize, 2106 &f_uac2_opts_attr_p_hs_bint, 2107 &f_uac2_opts_attr_c_chmask, 2108 &f_uac2_opts_attr_c_srate, 2109 &f_uac2_opts_attr_c_ssize, 2110 &f_uac2_opts_attr_c_hs_bint, 2111 &f_uac2_opts_attr_c_sync, 2112 &f_uac2_opts_attr_req_number, 2113 &f_uac2_opts_attr_fb_max, 2114 2115 &f_uac2_opts_attr_p_mute_present, 2116 &f_uac2_opts_attr_p_volume_present, 2117 &f_uac2_opts_attr_p_volume_min, 2118 &f_uac2_opts_attr_p_volume_max, 2119 &f_uac2_opts_attr_p_volume_res, 2120 2121 &f_uac2_opts_attr_c_mute_present, 2122 &f_uac2_opts_attr_c_volume_present, 2123 &f_uac2_opts_attr_c_volume_min, 2124 &f_uac2_opts_attr_c_volume_max, 2125 &f_uac2_opts_attr_c_volume_res, 2126 2127 &f_uac2_opts_attr_function_name, 2128 2129 NULL, 2130 }; 2131 2132 static const struct config_item_type f_uac2_func_type = { 2133 .ct_item_ops = &f_uac2_item_ops, 2134 .ct_attrs = f_uac2_attrs, 2135 .ct_owner = THIS_MODULE, 2136 }; 2137 2138 static void afunc_free_inst(struct usb_function_instance *f) 2139 { 2140 struct f_uac2_opts *opts; 2141 2142 opts = container_of(f, struct f_uac2_opts, func_inst); 2143 kfree(opts); 2144 } 2145 2146 static struct usb_function_instance *afunc_alloc_inst(void) 2147 { 2148 struct f_uac2_opts *opts; 2149 2150 opts = kzalloc(sizeof(*opts), GFP_KERNEL); 2151 if (!opts) 2152 return ERR_PTR(-ENOMEM); 2153 2154 mutex_init(&opts->lock); 2155 opts->func_inst.free_func_inst = afunc_free_inst; 2156 2157 config_group_init_type_name(&opts->func_inst.group, "", 2158 &f_uac2_func_type); 2159 2160 opts->p_chmask = UAC2_DEF_PCHMASK; 2161 opts->p_srates[0] = UAC2_DEF_PSRATE; 2162 opts->p_ssize = UAC2_DEF_PSSIZE; 2163 opts->p_hs_bint = UAC2_DEF_PHSBINT; 2164 opts->c_chmask = UAC2_DEF_CCHMASK; 2165 opts->c_srates[0] = UAC2_DEF_CSRATE; 2166 opts->c_ssize = UAC2_DEF_CSSIZE; 2167 opts->c_hs_bint = UAC2_DEF_CHSBINT; 2168 opts->c_sync = UAC2_DEF_CSYNC; 2169 2170 opts->p_mute_present = UAC2_DEF_MUTE_PRESENT; 2171 opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT; 2172 opts->p_volume_min = UAC2_DEF_MIN_DB; 2173 opts->p_volume_max = UAC2_DEF_MAX_DB; 2174 opts->p_volume_res = UAC2_DEF_RES_DB; 2175 2176 opts->c_mute_present = UAC2_DEF_MUTE_PRESENT; 2177 opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT; 2178 opts->c_volume_min = UAC2_DEF_MIN_DB; 2179 opts->c_volume_max = UAC2_DEF_MAX_DB; 2180 opts->c_volume_res = UAC2_DEF_RES_DB; 2181 2182 opts->req_number = UAC2_DEF_REQ_NUM; 2183 opts->fb_max = FBACK_FAST_MAX; 2184 2185 scnprintf(opts->function_name, sizeof(opts->function_name), "Source/Sink"); 2186 2187 return &opts->func_inst; 2188 } 2189 2190 static void afunc_free(struct usb_function *f) 2191 { 2192 struct g_audio *agdev; 2193 struct f_uac2_opts *opts; 2194 2195 agdev = func_to_g_audio(f); 2196 opts = container_of(f->fi, struct f_uac2_opts, func_inst); 2197 kfree(agdev); 2198 mutex_lock(&opts->lock); 2199 --opts->refcnt; 2200 mutex_unlock(&opts->lock); 2201 } 2202 2203 static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) 2204 { 2205 struct g_audio *agdev = func_to_g_audio(f); 2206 2207 g_audio_cleanup(agdev); 2208 usb_free_all_descriptors(f); 2209 2210 agdev->gadget = NULL; 2211 2212 kfree(out_feature_unit_desc); 2213 out_feature_unit_desc = NULL; 2214 kfree(in_feature_unit_desc); 2215 in_feature_unit_desc = NULL; 2216 } 2217 2218 static struct usb_function *afunc_alloc(struct usb_function_instance *fi) 2219 { 2220 struct f_uac2 *uac2; 2221 struct f_uac2_opts *opts; 2222 2223 uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); 2224 if (uac2 == NULL) 2225 return ERR_PTR(-ENOMEM); 2226 2227 opts = container_of(fi, struct f_uac2_opts, func_inst); 2228 mutex_lock(&opts->lock); 2229 ++opts->refcnt; 2230 mutex_unlock(&opts->lock); 2231 2232 uac2->g_audio.func.name = "uac2_func"; 2233 uac2->g_audio.func.bind = afunc_bind; 2234 uac2->g_audio.func.unbind = afunc_unbind; 2235 uac2->g_audio.func.set_alt = afunc_set_alt; 2236 uac2->g_audio.func.get_alt = afunc_get_alt; 2237 uac2->g_audio.func.disable = afunc_disable; 2238 uac2->g_audio.func.suspend = afunc_suspend; 2239 uac2->g_audio.func.setup = afunc_setup; 2240 uac2->g_audio.func.free_func = afunc_free; 2241 2242 return &uac2->g_audio.func; 2243 } 2244 2245 DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); 2246 MODULE_LICENSE("GPL"); 2247 MODULE_AUTHOR("Yadwinder Singh"); 2248 MODULE_AUTHOR("Jaswinder Singh"); 2249 MODULE_AUTHOR("Ruslan Bilovol"); 2250