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 #include "u_uac2.h" 19 20 /* UAC2 spec: 4.1 Audio Channel Cluster Descriptor */ 21 #define UAC2_CHANNEL_MASK 0x07FFFFFF 22 23 /* 24 * The driver implements a simple UAC_2 topology. 25 * USB-OUT -> IT_1 -> FU -> OT_3 -> ALSA_Capture 26 * ALSA_Playback -> IT_2 -> FU -> OT_4 -> USB-IN 27 * Capture and Playback sampling rates are independently 28 * controlled by two clock sources : 29 * CLK_5 := c_srate, and CLK_6 := p_srate 30 */ 31 #define USB_OUT_CLK_ID (out_clk_src_desc.bClockID) 32 #define USB_IN_CLK_ID (in_clk_src_desc.bClockID) 33 #define USB_OUT_FU_ID (out_feature_unit_desc->bUnitID) 34 #define USB_IN_FU_ID (in_feature_unit_desc->bUnitID) 35 36 #define CONTROL_ABSENT 0 37 #define CONTROL_RDONLY 1 38 #define CONTROL_RDWR 3 39 40 #define CLK_FREQ_CTRL 0 41 #define CLK_VLD_CTRL 2 42 #define FU_MUTE_CTRL 0 43 #define FU_VOL_CTRL 2 44 45 #define COPY_CTRL 0 46 #define CONN_CTRL 2 47 #define OVRLD_CTRL 4 48 #define CLSTR_CTRL 6 49 #define UNFLW_CTRL 8 50 #define OVFLW_CTRL 10 51 52 #define EPIN_EN(_opts) ((_opts)->p_chmask != 0) 53 #define EPOUT_EN(_opts) ((_opts)->c_chmask != 0) 54 #define FUIN_EN(_opts) (EPIN_EN(_opts) \ 55 && ((_opts)->p_mute_present \ 56 || (_opts)->p_volume_present)) 57 #define FUOUT_EN(_opts) (EPOUT_EN(_opts) \ 58 && ((_opts)->c_mute_present \ 59 || (_opts)->c_volume_present)) 60 #define EPOUT_FBACK_IN_EN(_opts) ((_opts)->c_sync == USB_ENDPOINT_SYNC_ASYNC) 61 62 struct f_uac2 { 63 struct g_audio g_audio; 64 u8 ac_intf, as_in_intf, as_out_intf; 65 u8 ac_alt, as_in_alt, as_out_alt; /* needed for get_alt() */ 66 67 struct usb_ctrlrequest setup_cr; /* will be used in data stage */ 68 69 /* Interrupt IN endpoint of AC interface */ 70 struct usb_ep *int_ep; 71 atomic_t int_count; 72 }; 73 74 static inline struct f_uac2 *func_to_uac2(struct usb_function *f) 75 { 76 return container_of(f, struct f_uac2, g_audio.func); 77 } 78 79 static inline 80 struct f_uac2_opts *g_audio_to_uac2_opts(struct g_audio *agdev) 81 { 82 return container_of(agdev->func.fi, struct f_uac2_opts, func_inst); 83 } 84 85 static int afunc_notify(struct g_audio *agdev, int unit_id, int cs); 86 87 /* --------- USB Function Interface ------------- */ 88 89 enum { 90 STR_ASSOC, 91 STR_IF_CTRL, 92 STR_CLKSRC_IN, 93 STR_CLKSRC_OUT, 94 STR_USB_IT, 95 STR_IO_IT, 96 STR_USB_OT, 97 STR_IO_OT, 98 STR_FU_IN, 99 STR_FU_OUT, 100 STR_AS_OUT_ALT0, 101 STR_AS_OUT_ALT1, 102 STR_AS_IN_ALT0, 103 STR_AS_IN_ALT1, 104 }; 105 106 static char clksrc_in[8]; 107 static char clksrc_out[8]; 108 109 static struct usb_string strings_fn[] = { 110 [STR_ASSOC].s = "Source/Sink", 111 [STR_IF_CTRL].s = "Topology Control", 112 [STR_CLKSRC_IN].s = clksrc_in, 113 [STR_CLKSRC_OUT].s = clksrc_out, 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 struct usb_gadget_strings str_fn = { 128 .language = 0x0409, /* en-us */ 129 .strings = strings_fn, 130 }; 131 132 static struct usb_gadget_strings *fn_strings[] = { 133 &str_fn, 134 NULL, 135 }; 136 137 static struct usb_interface_assoc_descriptor iad_desc = { 138 .bLength = sizeof iad_desc, 139 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, 140 141 .bFirstInterface = 0, 142 .bInterfaceCount = 3, 143 .bFunctionClass = USB_CLASS_AUDIO, 144 .bFunctionSubClass = UAC2_FUNCTION_SUBCLASS_UNDEFINED, 145 .bFunctionProtocol = UAC_VERSION_2, 146 }; 147 148 /* Audio Control Interface */ 149 static struct usb_interface_descriptor std_ac_if_desc = { 150 .bLength = sizeof std_ac_if_desc, 151 .bDescriptorType = USB_DT_INTERFACE, 152 153 .bAlternateSetting = 0, 154 /* .bNumEndpoints = DYNAMIC */ 155 .bInterfaceClass = USB_CLASS_AUDIO, 156 .bInterfaceSubClass = USB_SUBCLASS_AUDIOCONTROL, 157 .bInterfaceProtocol = UAC_VERSION_2, 158 }; 159 160 /* Clock source for IN traffic */ 161 static struct uac_clock_source_descriptor in_clk_src_desc = { 162 .bLength = sizeof in_clk_src_desc, 163 .bDescriptorType = USB_DT_CS_INTERFACE, 164 165 .bDescriptorSubtype = UAC2_CLOCK_SOURCE, 166 /* .bClockID = DYNAMIC */ 167 .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, 168 .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), 169 .bAssocTerminal = 0, 170 }; 171 172 /* Clock source for OUT traffic */ 173 static struct uac_clock_source_descriptor out_clk_src_desc = { 174 .bLength = sizeof out_clk_src_desc, 175 .bDescriptorType = USB_DT_CS_INTERFACE, 176 177 .bDescriptorSubtype = UAC2_CLOCK_SOURCE, 178 /* .bClockID = DYNAMIC */ 179 .bmAttributes = UAC_CLOCK_SOURCE_TYPE_INT_FIXED, 180 .bmControls = (CONTROL_RDONLY << CLK_FREQ_CTRL), 181 .bAssocTerminal = 0, 182 }; 183 184 /* Input Terminal for USB_OUT */ 185 static struct uac2_input_terminal_descriptor usb_out_it_desc = { 186 .bLength = sizeof usb_out_it_desc, 187 .bDescriptorType = USB_DT_CS_INTERFACE, 188 189 .bDescriptorSubtype = UAC_INPUT_TERMINAL, 190 /* .bTerminalID = DYNAMIC */ 191 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), 192 .bAssocTerminal = 0, 193 /* .bCSourceID = DYNAMIC */ 194 .iChannelNames = 0, 195 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 196 }; 197 198 /* Input Terminal for I/O-In */ 199 static struct uac2_input_terminal_descriptor io_in_it_desc = { 200 .bLength = sizeof io_in_it_desc, 201 .bDescriptorType = USB_DT_CS_INTERFACE, 202 203 .bDescriptorSubtype = UAC_INPUT_TERMINAL, 204 /* .bTerminalID = DYNAMIC */ 205 .wTerminalType = cpu_to_le16(UAC_INPUT_TERMINAL_UNDEFINED), 206 .bAssocTerminal = 0, 207 /* .bCSourceID = DYNAMIC */ 208 .iChannelNames = 0, 209 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 210 }; 211 212 /* Ouput Terminal for USB_IN */ 213 static struct uac2_output_terminal_descriptor usb_in_ot_desc = { 214 .bLength = sizeof usb_in_ot_desc, 215 .bDescriptorType = USB_DT_CS_INTERFACE, 216 217 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, 218 /* .bTerminalID = DYNAMIC */ 219 .wTerminalType = cpu_to_le16(UAC_TERMINAL_STREAMING), 220 .bAssocTerminal = 0, 221 /* .bSourceID = DYNAMIC */ 222 /* .bCSourceID = DYNAMIC */ 223 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 224 }; 225 226 /* Ouput Terminal for I/O-Out */ 227 static struct uac2_output_terminal_descriptor io_out_ot_desc = { 228 .bLength = sizeof io_out_ot_desc, 229 .bDescriptorType = USB_DT_CS_INTERFACE, 230 231 .bDescriptorSubtype = UAC_OUTPUT_TERMINAL, 232 /* .bTerminalID = DYNAMIC */ 233 .wTerminalType = cpu_to_le16(UAC_OUTPUT_TERMINAL_UNDEFINED), 234 .bAssocTerminal = 0, 235 /* .bSourceID = DYNAMIC */ 236 /* .bCSourceID = DYNAMIC */ 237 .bmControls = cpu_to_le16(CONTROL_RDWR << COPY_CTRL), 238 }; 239 240 static struct uac2_feature_unit_descriptor *in_feature_unit_desc; 241 static struct uac2_feature_unit_descriptor *out_feature_unit_desc; 242 243 static struct uac2_ac_header_descriptor ac_hdr_desc = { 244 .bLength = sizeof ac_hdr_desc, 245 .bDescriptorType = USB_DT_CS_INTERFACE, 246 247 .bDescriptorSubtype = UAC_MS_HEADER, 248 .bcdADC = cpu_to_le16(0x200), 249 .bCategory = UAC2_FUNCTION_IO_BOX, 250 /* .wTotalLength = DYNAMIC */ 251 .bmControls = 0, 252 }; 253 254 /* AC IN Interrupt Endpoint */ 255 static struct usb_endpoint_descriptor fs_ep_int_desc = { 256 .bLength = USB_DT_ENDPOINT_SIZE, 257 .bDescriptorType = USB_DT_ENDPOINT, 258 259 .bEndpointAddress = USB_DIR_IN, 260 .bmAttributes = USB_ENDPOINT_XFER_INT, 261 .wMaxPacketSize = cpu_to_le16(6), 262 .bInterval = 1, 263 }; 264 265 static struct usb_endpoint_descriptor hs_ep_int_desc = { 266 .bLength = USB_DT_ENDPOINT_SIZE, 267 .bDescriptorType = USB_DT_ENDPOINT, 268 269 .bmAttributes = USB_ENDPOINT_XFER_INT, 270 .wMaxPacketSize = cpu_to_le16(6), 271 .bInterval = 4, 272 }; 273 274 static struct usb_endpoint_descriptor ss_ep_int_desc = { 275 .bLength = USB_DT_ENDPOINT_SIZE, 276 .bDescriptorType = USB_DT_ENDPOINT, 277 278 .bEndpointAddress = USB_DIR_IN, 279 .bmAttributes = USB_ENDPOINT_XFER_INT, 280 .wMaxPacketSize = cpu_to_le16(6), 281 .bInterval = 4, 282 }; 283 284 /* Audio Streaming OUT Interface - Alt0 */ 285 static struct usb_interface_descriptor std_as_out_if0_desc = { 286 .bLength = sizeof std_as_out_if0_desc, 287 .bDescriptorType = USB_DT_INTERFACE, 288 289 .bAlternateSetting = 0, 290 .bNumEndpoints = 0, 291 .bInterfaceClass = USB_CLASS_AUDIO, 292 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 293 .bInterfaceProtocol = UAC_VERSION_2, 294 }; 295 296 /* Audio Streaming OUT Interface - Alt1 */ 297 static struct usb_interface_descriptor std_as_out_if1_desc = { 298 .bLength = sizeof std_as_out_if1_desc, 299 .bDescriptorType = USB_DT_INTERFACE, 300 301 .bAlternateSetting = 1, 302 .bNumEndpoints = 1, 303 .bInterfaceClass = USB_CLASS_AUDIO, 304 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 305 .bInterfaceProtocol = UAC_VERSION_2, 306 }; 307 308 /* Audio Stream OUT Intface Desc */ 309 static struct uac2_as_header_descriptor as_out_hdr_desc = { 310 .bLength = sizeof as_out_hdr_desc, 311 .bDescriptorType = USB_DT_CS_INTERFACE, 312 313 .bDescriptorSubtype = UAC_AS_GENERAL, 314 /* .bTerminalLink = DYNAMIC */ 315 .bmControls = 0, 316 .bFormatType = UAC_FORMAT_TYPE_I, 317 .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), 318 .iChannelNames = 0, 319 }; 320 321 /* Audio USB_OUT Format */ 322 static struct uac2_format_type_i_descriptor as_out_fmt1_desc = { 323 .bLength = sizeof as_out_fmt1_desc, 324 .bDescriptorType = USB_DT_CS_INTERFACE, 325 .bDescriptorSubtype = UAC_FORMAT_TYPE, 326 .bFormatType = UAC_FORMAT_TYPE_I, 327 }; 328 329 /* STD AS ISO OUT Endpoint */ 330 static struct usb_endpoint_descriptor fs_epout_desc = { 331 .bLength = USB_DT_ENDPOINT_SIZE, 332 .bDescriptorType = USB_DT_ENDPOINT, 333 334 .bEndpointAddress = USB_DIR_OUT, 335 /* .bmAttributes = DYNAMIC */ 336 /* .wMaxPacketSize = DYNAMIC */ 337 .bInterval = 1, 338 }; 339 340 static struct usb_endpoint_descriptor hs_epout_desc = { 341 .bLength = USB_DT_ENDPOINT_SIZE, 342 .bDescriptorType = USB_DT_ENDPOINT, 343 344 /* .bmAttributes = DYNAMIC */ 345 /* .wMaxPacketSize = DYNAMIC */ 346 .bInterval = 4, 347 }; 348 349 static struct usb_endpoint_descriptor ss_epout_desc = { 350 .bLength = USB_DT_ENDPOINT_SIZE, 351 .bDescriptorType = USB_DT_ENDPOINT, 352 353 .bEndpointAddress = USB_DIR_OUT, 354 /* .bmAttributes = DYNAMIC */ 355 /* .wMaxPacketSize = DYNAMIC */ 356 .bInterval = 4, 357 }; 358 359 static struct usb_ss_ep_comp_descriptor ss_epout_desc_comp = { 360 .bLength = sizeof(ss_epout_desc_comp), 361 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 362 .bMaxBurst = 0, 363 .bmAttributes = 0, 364 /* wBytesPerInterval = DYNAMIC */ 365 }; 366 367 /* CS AS ISO OUT Endpoint */ 368 static struct uac2_iso_endpoint_descriptor as_iso_out_desc = { 369 .bLength = sizeof as_iso_out_desc, 370 .bDescriptorType = USB_DT_CS_ENDPOINT, 371 372 .bDescriptorSubtype = UAC_EP_GENERAL, 373 .bmAttributes = 0, 374 .bmControls = 0, 375 .bLockDelayUnits = 0, 376 .wLockDelay = 0, 377 }; 378 379 /* STD AS ISO IN Feedback Endpoint */ 380 static struct usb_endpoint_descriptor fs_epin_fback_desc = { 381 .bLength = USB_DT_ENDPOINT_SIZE, 382 .bDescriptorType = USB_DT_ENDPOINT, 383 384 .bEndpointAddress = USB_DIR_IN, 385 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 386 .wMaxPacketSize = cpu_to_le16(3), 387 .bInterval = 1, 388 }; 389 390 static struct usb_endpoint_descriptor hs_epin_fback_desc = { 391 .bLength = USB_DT_ENDPOINT_SIZE, 392 .bDescriptorType = USB_DT_ENDPOINT, 393 394 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 395 .wMaxPacketSize = cpu_to_le16(4), 396 .bInterval = 4, 397 }; 398 399 static struct usb_endpoint_descriptor ss_epin_fback_desc = { 400 .bLength = USB_DT_ENDPOINT_SIZE, 401 .bDescriptorType = USB_DT_ENDPOINT, 402 403 .bEndpointAddress = USB_DIR_IN, 404 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_USAGE_FEEDBACK, 405 .wMaxPacketSize = cpu_to_le16(4), 406 .bInterval = 4, 407 }; 408 409 static struct usb_ss_ep_comp_descriptor ss_epin_fback_desc_comp = { 410 .bLength = sizeof(ss_epin_fback_desc_comp), 411 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 412 .bMaxBurst = 0, 413 .bmAttributes = 0, 414 .wBytesPerInterval = cpu_to_le16(4), 415 }; 416 417 418 /* Audio Streaming IN Interface - Alt0 */ 419 static struct usb_interface_descriptor std_as_in_if0_desc = { 420 .bLength = sizeof std_as_in_if0_desc, 421 .bDescriptorType = USB_DT_INTERFACE, 422 423 .bAlternateSetting = 0, 424 .bNumEndpoints = 0, 425 .bInterfaceClass = USB_CLASS_AUDIO, 426 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 427 .bInterfaceProtocol = UAC_VERSION_2, 428 }; 429 430 /* Audio Streaming IN Interface - Alt1 */ 431 static struct usb_interface_descriptor std_as_in_if1_desc = { 432 .bLength = sizeof std_as_in_if1_desc, 433 .bDescriptorType = USB_DT_INTERFACE, 434 435 .bAlternateSetting = 1, 436 .bNumEndpoints = 1, 437 .bInterfaceClass = USB_CLASS_AUDIO, 438 .bInterfaceSubClass = USB_SUBCLASS_AUDIOSTREAMING, 439 .bInterfaceProtocol = UAC_VERSION_2, 440 }; 441 442 /* Audio Stream IN Intface Desc */ 443 static struct uac2_as_header_descriptor as_in_hdr_desc = { 444 .bLength = sizeof as_in_hdr_desc, 445 .bDescriptorType = USB_DT_CS_INTERFACE, 446 447 .bDescriptorSubtype = UAC_AS_GENERAL, 448 /* .bTerminalLink = DYNAMIC */ 449 .bmControls = 0, 450 .bFormatType = UAC_FORMAT_TYPE_I, 451 .bmFormats = cpu_to_le32(UAC_FORMAT_TYPE_I_PCM), 452 .iChannelNames = 0, 453 }; 454 455 /* Audio USB_IN Format */ 456 static struct uac2_format_type_i_descriptor as_in_fmt1_desc = { 457 .bLength = sizeof as_in_fmt1_desc, 458 .bDescriptorType = USB_DT_CS_INTERFACE, 459 .bDescriptorSubtype = UAC_FORMAT_TYPE, 460 .bFormatType = UAC_FORMAT_TYPE_I, 461 }; 462 463 /* STD AS ISO IN Endpoint */ 464 static struct usb_endpoint_descriptor fs_epin_desc = { 465 .bLength = USB_DT_ENDPOINT_SIZE, 466 .bDescriptorType = USB_DT_ENDPOINT, 467 468 .bEndpointAddress = USB_DIR_IN, 469 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 470 /* .wMaxPacketSize = DYNAMIC */ 471 .bInterval = 1, 472 }; 473 474 static struct usb_endpoint_descriptor hs_epin_desc = { 475 .bLength = USB_DT_ENDPOINT_SIZE, 476 .bDescriptorType = USB_DT_ENDPOINT, 477 478 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 479 /* .wMaxPacketSize = DYNAMIC */ 480 .bInterval = 4, 481 }; 482 483 static struct usb_endpoint_descriptor ss_epin_desc = { 484 .bLength = USB_DT_ENDPOINT_SIZE, 485 .bDescriptorType = USB_DT_ENDPOINT, 486 487 .bEndpointAddress = USB_DIR_IN, 488 .bmAttributes = USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC, 489 /* .wMaxPacketSize = DYNAMIC */ 490 .bInterval = 4, 491 }; 492 493 static struct usb_ss_ep_comp_descriptor ss_epin_desc_comp = { 494 .bLength = sizeof(ss_epin_desc_comp), 495 .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, 496 .bMaxBurst = 0, 497 .bmAttributes = 0, 498 /* wBytesPerInterval = DYNAMIC */ 499 }; 500 501 /* CS AS ISO IN Endpoint */ 502 static struct uac2_iso_endpoint_descriptor as_iso_in_desc = { 503 .bLength = sizeof as_iso_in_desc, 504 .bDescriptorType = USB_DT_CS_ENDPOINT, 505 506 .bDescriptorSubtype = UAC_EP_GENERAL, 507 .bmAttributes = 0, 508 .bmControls = 0, 509 .bLockDelayUnits = 0, 510 .wLockDelay = 0, 511 }; 512 513 static struct usb_descriptor_header *fs_audio_desc[] = { 514 (struct usb_descriptor_header *)&iad_desc, 515 (struct usb_descriptor_header *)&std_ac_if_desc, 516 517 (struct usb_descriptor_header *)&ac_hdr_desc, 518 (struct usb_descriptor_header *)&in_clk_src_desc, 519 (struct usb_descriptor_header *)&out_clk_src_desc, 520 (struct usb_descriptor_header *)&usb_out_it_desc, 521 (struct usb_descriptor_header *)&out_feature_unit_desc, 522 (struct usb_descriptor_header *)&io_in_it_desc, 523 (struct usb_descriptor_header *)&usb_in_ot_desc, 524 (struct usb_descriptor_header *)&in_feature_unit_desc, 525 (struct usb_descriptor_header *)&io_out_ot_desc, 526 527 (struct usb_descriptor_header *)&fs_ep_int_desc, 528 529 (struct usb_descriptor_header *)&std_as_out_if0_desc, 530 (struct usb_descriptor_header *)&std_as_out_if1_desc, 531 532 (struct usb_descriptor_header *)&as_out_hdr_desc, 533 (struct usb_descriptor_header *)&as_out_fmt1_desc, 534 (struct usb_descriptor_header *)&fs_epout_desc, 535 (struct usb_descriptor_header *)&as_iso_out_desc, 536 (struct usb_descriptor_header *)&fs_epin_fback_desc, 537 538 (struct usb_descriptor_header *)&std_as_in_if0_desc, 539 (struct usb_descriptor_header *)&std_as_in_if1_desc, 540 541 (struct usb_descriptor_header *)&as_in_hdr_desc, 542 (struct usb_descriptor_header *)&as_in_fmt1_desc, 543 (struct usb_descriptor_header *)&fs_epin_desc, 544 (struct usb_descriptor_header *)&as_iso_in_desc, 545 NULL, 546 }; 547 548 static struct usb_descriptor_header *hs_audio_desc[] = { 549 (struct usb_descriptor_header *)&iad_desc, 550 (struct usb_descriptor_header *)&std_ac_if_desc, 551 552 (struct usb_descriptor_header *)&ac_hdr_desc, 553 (struct usb_descriptor_header *)&in_clk_src_desc, 554 (struct usb_descriptor_header *)&out_clk_src_desc, 555 (struct usb_descriptor_header *)&usb_out_it_desc, 556 (struct usb_descriptor_header *)&out_feature_unit_desc, 557 (struct usb_descriptor_header *)&io_in_it_desc, 558 (struct usb_descriptor_header *)&usb_in_ot_desc, 559 (struct usb_descriptor_header *)&in_feature_unit_desc, 560 (struct usb_descriptor_header *)&io_out_ot_desc, 561 562 (struct usb_descriptor_header *)&hs_ep_int_desc, 563 564 (struct usb_descriptor_header *)&std_as_out_if0_desc, 565 (struct usb_descriptor_header *)&std_as_out_if1_desc, 566 567 (struct usb_descriptor_header *)&as_out_hdr_desc, 568 (struct usb_descriptor_header *)&as_out_fmt1_desc, 569 (struct usb_descriptor_header *)&hs_epout_desc, 570 (struct usb_descriptor_header *)&as_iso_out_desc, 571 (struct usb_descriptor_header *)&hs_epin_fback_desc, 572 573 (struct usb_descriptor_header *)&std_as_in_if0_desc, 574 (struct usb_descriptor_header *)&std_as_in_if1_desc, 575 576 (struct usb_descriptor_header *)&as_in_hdr_desc, 577 (struct usb_descriptor_header *)&as_in_fmt1_desc, 578 (struct usb_descriptor_header *)&hs_epin_desc, 579 (struct usb_descriptor_header *)&as_iso_in_desc, 580 NULL, 581 }; 582 583 static struct usb_descriptor_header *ss_audio_desc[] = { 584 (struct usb_descriptor_header *)&iad_desc, 585 (struct usb_descriptor_header *)&std_ac_if_desc, 586 587 (struct usb_descriptor_header *)&ac_hdr_desc, 588 (struct usb_descriptor_header *)&in_clk_src_desc, 589 (struct usb_descriptor_header *)&out_clk_src_desc, 590 (struct usb_descriptor_header *)&usb_out_it_desc, 591 (struct usb_descriptor_header *)&out_feature_unit_desc, 592 (struct usb_descriptor_header *)&io_in_it_desc, 593 (struct usb_descriptor_header *)&usb_in_ot_desc, 594 (struct usb_descriptor_header *)&in_feature_unit_desc, 595 (struct usb_descriptor_header *)&io_out_ot_desc, 596 597 (struct usb_descriptor_header *)&ss_ep_int_desc, 598 599 (struct usb_descriptor_header *)&std_as_out_if0_desc, 600 (struct usb_descriptor_header *)&std_as_out_if1_desc, 601 602 (struct usb_descriptor_header *)&as_out_hdr_desc, 603 (struct usb_descriptor_header *)&as_out_fmt1_desc, 604 (struct usb_descriptor_header *)&ss_epout_desc, 605 (struct usb_descriptor_header *)&ss_epout_desc_comp, 606 (struct usb_descriptor_header *)&as_iso_out_desc, 607 (struct usb_descriptor_header *)&ss_epin_fback_desc, 608 (struct usb_descriptor_header *)&ss_epin_fback_desc_comp, 609 610 (struct usb_descriptor_header *)&std_as_in_if0_desc, 611 (struct usb_descriptor_header *)&std_as_in_if1_desc, 612 613 (struct usb_descriptor_header *)&as_in_hdr_desc, 614 (struct usb_descriptor_header *)&as_in_fmt1_desc, 615 (struct usb_descriptor_header *)&ss_epin_desc, 616 (struct usb_descriptor_header *)&ss_epin_desc_comp, 617 (struct usb_descriptor_header *)&as_iso_in_desc, 618 NULL, 619 }; 620 621 struct cntrl_cur_lay2 { 622 __le16 wCUR; 623 }; 624 625 struct cntrl_range_lay2 { 626 __le16 wNumSubRanges; 627 __le16 wMIN; 628 __le16 wMAX; 629 __le16 wRES; 630 } __packed; 631 632 struct cntrl_cur_lay3 { 633 __le32 dCUR; 634 }; 635 636 struct cntrl_range_lay3 { 637 __le16 wNumSubRanges; 638 __le32 dMIN; 639 __le32 dMAX; 640 __le32 dRES; 641 } __packed; 642 643 static int set_ep_max_packet_size(const struct f_uac2_opts *uac2_opts, 644 struct usb_endpoint_descriptor *ep_desc, 645 enum usb_device_speed speed, bool is_playback) 646 { 647 int chmask, srate, ssize; 648 u16 max_size_bw, max_size_ep; 649 unsigned int factor; 650 651 switch (speed) { 652 case USB_SPEED_FULL: 653 max_size_ep = 1023; 654 factor = 1000; 655 break; 656 657 case USB_SPEED_HIGH: 658 case USB_SPEED_SUPER: 659 max_size_ep = 1024; 660 factor = 8000; 661 break; 662 663 default: 664 return -EINVAL; 665 } 666 667 if (is_playback) { 668 chmask = uac2_opts->p_chmask; 669 srate = uac2_opts->p_srate; 670 ssize = uac2_opts->p_ssize; 671 } else { 672 chmask = uac2_opts->c_chmask; 673 srate = uac2_opts->c_srate; 674 ssize = uac2_opts->c_ssize; 675 } 676 677 if (!is_playback && (uac2_opts->c_sync == USB_ENDPOINT_SYNC_ASYNC)) { 678 // Win10 requires max packet size + 1 frame 679 srate = srate * (1000 + uac2_opts->fb_max) / 1000; 680 // updated srate is always bigger, therefore DIV_ROUND_UP always yields +1 681 max_size_bw = num_channels(chmask) * ssize * 682 (DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1)))); 683 } else { 684 // adding 1 frame provision for Win10 685 max_size_bw = num_channels(chmask) * ssize * 686 (DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1))) + 1); 687 } 688 ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_size_bw, 689 max_size_ep)); 690 691 return 0; 692 } 693 694 static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask) 695 { 696 struct uac2_feature_unit_descriptor *fu_desc; 697 int channels = num_channels(chmask); 698 int fu_desc_size = UAC2_DT_FEATURE_UNIT_SIZE(channels); 699 700 fu_desc = kzalloc(fu_desc_size, GFP_KERNEL); 701 if (!fu_desc) 702 return NULL; 703 704 fu_desc->bLength = fu_desc_size; 705 fu_desc->bDescriptorType = USB_DT_CS_INTERFACE; 706 707 fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT; 708 709 /* bUnitID, bSourceID and bmaControls will be defined later */ 710 711 return fu_desc; 712 } 713 714 /* Use macro to overcome line length limitation */ 715 #define USBDHDR(p) (struct usb_descriptor_header *)(p) 716 717 static void setup_headers(struct f_uac2_opts *opts, 718 struct usb_descriptor_header **headers, 719 enum usb_device_speed speed) 720 { 721 struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL; 722 struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL; 723 struct usb_ss_ep_comp_descriptor *epin_fback_desc_comp = NULL; 724 struct usb_endpoint_descriptor *epout_desc; 725 struct usb_endpoint_descriptor *epin_desc; 726 struct usb_endpoint_descriptor *epin_fback_desc; 727 struct usb_endpoint_descriptor *ep_int_desc; 728 int i; 729 730 switch (speed) { 731 case USB_SPEED_FULL: 732 epout_desc = &fs_epout_desc; 733 epin_desc = &fs_epin_desc; 734 epin_fback_desc = &fs_epin_fback_desc; 735 ep_int_desc = &fs_ep_int_desc; 736 break; 737 case USB_SPEED_HIGH: 738 epout_desc = &hs_epout_desc; 739 epin_desc = &hs_epin_desc; 740 epin_fback_desc = &hs_epin_fback_desc; 741 ep_int_desc = &hs_ep_int_desc; 742 break; 743 default: 744 epout_desc = &ss_epout_desc; 745 epin_desc = &ss_epin_desc; 746 epout_desc_comp = &ss_epout_desc_comp; 747 epin_desc_comp = &ss_epin_desc_comp; 748 epin_fback_desc = &ss_epin_fback_desc; 749 epin_fback_desc_comp = &ss_epin_fback_desc_comp; 750 ep_int_desc = &ss_ep_int_desc; 751 } 752 753 i = 0; 754 headers[i++] = USBDHDR(&iad_desc); 755 headers[i++] = USBDHDR(&std_ac_if_desc); 756 headers[i++] = USBDHDR(&ac_hdr_desc); 757 if (EPIN_EN(opts)) 758 headers[i++] = USBDHDR(&in_clk_src_desc); 759 if (EPOUT_EN(opts)) { 760 headers[i++] = USBDHDR(&out_clk_src_desc); 761 headers[i++] = USBDHDR(&usb_out_it_desc); 762 763 if (FUOUT_EN(opts)) 764 headers[i++] = USBDHDR(out_feature_unit_desc); 765 } 766 767 if (EPIN_EN(opts)) { 768 headers[i++] = USBDHDR(&io_in_it_desc); 769 770 if (FUIN_EN(opts)) 771 headers[i++] = USBDHDR(in_feature_unit_desc); 772 773 headers[i++] = USBDHDR(&usb_in_ot_desc); 774 } 775 776 if (EPOUT_EN(opts)) 777 headers[i++] = USBDHDR(&io_out_ot_desc); 778 779 if (FUOUT_EN(opts) || FUIN_EN(opts)) 780 headers[i++] = USBDHDR(ep_int_desc); 781 782 if (EPOUT_EN(opts)) { 783 headers[i++] = USBDHDR(&std_as_out_if0_desc); 784 headers[i++] = USBDHDR(&std_as_out_if1_desc); 785 headers[i++] = USBDHDR(&as_out_hdr_desc); 786 headers[i++] = USBDHDR(&as_out_fmt1_desc); 787 headers[i++] = USBDHDR(epout_desc); 788 if (epout_desc_comp) 789 headers[i++] = USBDHDR(epout_desc_comp); 790 791 headers[i++] = USBDHDR(&as_iso_out_desc); 792 793 if (EPOUT_FBACK_IN_EN(opts)) { 794 headers[i++] = USBDHDR(epin_fback_desc); 795 if (epin_fback_desc_comp) 796 headers[i++] = USBDHDR(epin_fback_desc_comp); 797 } 798 } 799 800 if (EPIN_EN(opts)) { 801 headers[i++] = USBDHDR(&std_as_in_if0_desc); 802 headers[i++] = USBDHDR(&std_as_in_if1_desc); 803 headers[i++] = USBDHDR(&as_in_hdr_desc); 804 headers[i++] = USBDHDR(&as_in_fmt1_desc); 805 headers[i++] = USBDHDR(epin_desc); 806 if (epin_desc_comp) 807 headers[i++] = USBDHDR(epin_desc_comp); 808 809 headers[i++] = USBDHDR(&as_iso_in_desc); 810 } 811 headers[i] = NULL; 812 } 813 814 static void setup_descriptor(struct f_uac2_opts *opts) 815 { 816 /* patch descriptors */ 817 int i = 1; /* ID's start with 1 */ 818 819 if (EPOUT_EN(opts)) 820 usb_out_it_desc.bTerminalID = i++; 821 if (EPIN_EN(opts)) 822 io_in_it_desc.bTerminalID = i++; 823 if (EPOUT_EN(opts)) 824 io_out_ot_desc.bTerminalID = i++; 825 if (EPIN_EN(opts)) 826 usb_in_ot_desc.bTerminalID = i++; 827 if (FUOUT_EN(opts)) 828 out_feature_unit_desc->bUnitID = i++; 829 if (FUIN_EN(opts)) 830 in_feature_unit_desc->bUnitID = i++; 831 if (EPOUT_EN(opts)) 832 out_clk_src_desc.bClockID = i++; 833 if (EPIN_EN(opts)) 834 in_clk_src_desc.bClockID = i++; 835 836 usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID; 837 838 if (FUIN_EN(opts)) { 839 usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID; 840 in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID; 841 } else { 842 usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID; 843 } 844 845 usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID; 846 io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID; 847 io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID; 848 849 if (FUOUT_EN(opts)) { 850 io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID; 851 out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID; 852 } else { 853 io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID; 854 } 855 856 as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID; 857 as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; 858 859 iad_desc.bInterfaceCount = 1; 860 ac_hdr_desc.wTotalLength = cpu_to_le16(sizeof(ac_hdr_desc)); 861 862 if (EPIN_EN(opts)) { 863 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 864 865 len += sizeof(in_clk_src_desc); 866 len += sizeof(usb_in_ot_desc); 867 868 if (FUIN_EN(opts)) 869 len += in_feature_unit_desc->bLength; 870 871 len += sizeof(io_in_it_desc); 872 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 873 iad_desc.bInterfaceCount++; 874 } 875 if (EPOUT_EN(opts)) { 876 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 877 878 len += sizeof(out_clk_src_desc); 879 len += sizeof(usb_out_it_desc); 880 881 if (FUOUT_EN(opts)) 882 len += out_feature_unit_desc->bLength; 883 884 len += sizeof(io_out_ot_desc); 885 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 886 iad_desc.bInterfaceCount++; 887 } 888 889 setup_headers(opts, fs_audio_desc, USB_SPEED_FULL); 890 setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH); 891 setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER); 892 } 893 894 static int afunc_validate_opts(struct g_audio *agdev, struct device *dev) 895 { 896 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 897 898 if (!opts->p_chmask && !opts->c_chmask) { 899 dev_err(dev, "Error: no playback and capture channels\n"); 900 return -EINVAL; 901 } else if (opts->p_chmask & ~UAC2_CHANNEL_MASK) { 902 dev_err(dev, "Error: unsupported playback channels mask\n"); 903 return -EINVAL; 904 } else if (opts->c_chmask & ~UAC2_CHANNEL_MASK) { 905 dev_err(dev, "Error: unsupported capture channels mask\n"); 906 return -EINVAL; 907 } else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) { 908 dev_err(dev, "Error: incorrect playback sample size\n"); 909 return -EINVAL; 910 } else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) { 911 dev_err(dev, "Error: incorrect capture sample size\n"); 912 return -EINVAL; 913 } else if (!opts->p_srate) { 914 dev_err(dev, "Error: incorrect playback sampling rate\n"); 915 return -EINVAL; 916 } else if (!opts->c_srate) { 917 dev_err(dev, "Error: incorrect capture sampling rate\n"); 918 return -EINVAL; 919 } 920 921 if (opts->p_volume_max <= opts->p_volume_min) { 922 dev_err(dev, "Error: incorrect playback volume max/min\n"); 923 return -EINVAL; 924 } else if (opts->c_volume_max <= opts->c_volume_min) { 925 dev_err(dev, "Error: incorrect capture volume max/min\n"); 926 return -EINVAL; 927 } else if (opts->p_volume_res <= 0) { 928 dev_err(dev, "Error: negative/zero playback volume resolution\n"); 929 return -EINVAL; 930 } else if (opts->c_volume_res <= 0) { 931 dev_err(dev, "Error: negative/zero capture volume resolution\n"); 932 return -EINVAL; 933 } 934 935 if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) { 936 dev_err(dev, "Error: incorrect playback volume resolution\n"); 937 return -EINVAL; 938 } else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) { 939 dev_err(dev, "Error: incorrect capture volume resolution\n"); 940 return -EINVAL; 941 } 942 943 return 0; 944 } 945 946 static int 947 afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) 948 { 949 struct f_uac2 *uac2 = func_to_uac2(fn); 950 struct g_audio *agdev = func_to_g_audio(fn); 951 struct usb_composite_dev *cdev = cfg->cdev; 952 struct usb_gadget *gadget = cdev->gadget; 953 struct device *dev = &gadget->dev; 954 struct f_uac2_opts *uac2_opts = g_audio_to_uac2_opts(agdev); 955 struct usb_string *us; 956 int ret; 957 958 ret = afunc_validate_opts(agdev, dev); 959 if (ret) 960 return ret; 961 962 us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); 963 if (IS_ERR(us)) 964 return PTR_ERR(us); 965 966 if (FUOUT_EN(uac2_opts)) { 967 out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask); 968 if (!out_feature_unit_desc) 969 return -ENOMEM; 970 } 971 if (FUIN_EN(uac2_opts)) { 972 in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask); 973 if (!in_feature_unit_desc) { 974 ret = -ENOMEM; 975 goto err_free_fu; 976 } 977 } 978 979 iad_desc.iFunction = us[STR_ASSOC].id; 980 std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; 981 in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; 982 out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; 983 usb_out_it_desc.iTerminal = us[STR_USB_IT].id; 984 io_in_it_desc.iTerminal = us[STR_IO_IT].id; 985 usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; 986 io_out_ot_desc.iTerminal = us[STR_IO_OT].id; 987 std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; 988 std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; 989 std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; 990 std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; 991 992 if (FUOUT_EN(uac2_opts)) { 993 u8 *i_feature = (u8 *)out_feature_unit_desc + 994 out_feature_unit_desc->bLength - 1; 995 *i_feature = us[STR_FU_OUT].id; 996 } 997 if (FUIN_EN(uac2_opts)) { 998 u8 *i_feature = (u8 *)in_feature_unit_desc + 999 in_feature_unit_desc->bLength - 1; 1000 *i_feature = us[STR_FU_IN].id; 1001 } 1002 1003 1004 /* Initialize the configurable parameters */ 1005 usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1006 usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1007 io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1008 io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1009 as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1010 as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1011 as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1012 as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1013 as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; 1014 as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; 1015 as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; 1016 as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; 1017 if (FUOUT_EN(uac2_opts)) { 1018 __le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0]; 1019 u32 control = 0; 1020 1021 if (uac2_opts->c_mute_present) 1022 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1023 if (uac2_opts->c_volume_present) 1024 control |= CONTROL_RDWR << FU_VOL_CTRL; 1025 *bma = cpu_to_le32(control); 1026 } 1027 if (FUIN_EN(uac2_opts)) { 1028 __le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0]; 1029 u32 control = 0; 1030 1031 if (uac2_opts->p_mute_present) 1032 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1033 if (uac2_opts->p_volume_present) 1034 control |= CONTROL_RDWR << FU_VOL_CTRL; 1035 *bma = cpu_to_le32(control); 1036 } 1037 1038 snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate); 1039 snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate); 1040 1041 ret = usb_interface_id(cfg, fn); 1042 if (ret < 0) { 1043 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1044 goto err_free_fu; 1045 } 1046 iad_desc.bFirstInterface = ret; 1047 1048 std_ac_if_desc.bInterfaceNumber = ret; 1049 uac2->ac_intf = ret; 1050 uac2->ac_alt = 0; 1051 1052 if (EPOUT_EN(uac2_opts)) { 1053 ret = usb_interface_id(cfg, fn); 1054 if (ret < 0) { 1055 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1056 goto err_free_fu; 1057 } 1058 std_as_out_if0_desc.bInterfaceNumber = ret; 1059 std_as_out_if1_desc.bInterfaceNumber = ret; 1060 uac2->as_out_intf = ret; 1061 uac2->as_out_alt = 0; 1062 1063 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1064 fs_epout_desc.bmAttributes = 1065 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1066 hs_epout_desc.bmAttributes = 1067 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1068 ss_epout_desc.bmAttributes = 1069 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1070 std_as_out_if1_desc.bNumEndpoints++; 1071 } else { 1072 fs_epout_desc.bmAttributes = 1073 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1074 hs_epout_desc.bmAttributes = 1075 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1076 ss_epout_desc.bmAttributes = 1077 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1078 } 1079 } 1080 1081 if (EPIN_EN(uac2_opts)) { 1082 ret = usb_interface_id(cfg, fn); 1083 if (ret < 0) { 1084 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1085 goto err_free_fu; 1086 } 1087 std_as_in_if0_desc.bInterfaceNumber = ret; 1088 std_as_in_if1_desc.bInterfaceNumber = ret; 1089 uac2->as_in_intf = ret; 1090 uac2->as_in_alt = 0; 1091 } 1092 1093 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) { 1094 uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc); 1095 if (!uac2->int_ep) { 1096 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1097 ret = -ENODEV; 1098 goto err_free_fu; 1099 } 1100 1101 std_ac_if_desc.bNumEndpoints = 1; 1102 } 1103 1104 /* Calculate wMaxPacketSize according to audio bandwidth */ 1105 ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL, 1106 true); 1107 if (ret < 0) { 1108 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1109 return ret; 1110 } 1111 1112 ret = set_ep_max_packet_size(uac2_opts, &fs_epout_desc, USB_SPEED_FULL, 1113 false); 1114 if (ret < 0) { 1115 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1116 return ret; 1117 } 1118 1119 ret = set_ep_max_packet_size(uac2_opts, &hs_epin_desc, USB_SPEED_HIGH, 1120 true); 1121 if (ret < 0) { 1122 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1123 return ret; 1124 } 1125 1126 ret = set_ep_max_packet_size(uac2_opts, &hs_epout_desc, USB_SPEED_HIGH, 1127 false); 1128 if (ret < 0) { 1129 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1130 return ret; 1131 } 1132 1133 ret = set_ep_max_packet_size(uac2_opts, &ss_epin_desc, USB_SPEED_SUPER, 1134 true); 1135 if (ret < 0) { 1136 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1137 return ret; 1138 } 1139 1140 ret = set_ep_max_packet_size(uac2_opts, &ss_epout_desc, USB_SPEED_SUPER, 1141 false); 1142 if (ret < 0) { 1143 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1144 return ret; 1145 } 1146 1147 if (EPOUT_EN(uac2_opts)) { 1148 agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); 1149 if (!agdev->out_ep) { 1150 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1151 ret = -ENODEV; 1152 goto err_free_fu; 1153 } 1154 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1155 agdev->in_ep_fback = usb_ep_autoconfig(gadget, 1156 &fs_epin_fback_desc); 1157 if (!agdev->in_ep_fback) { 1158 dev_err(dev, "%s:%d Error!\n", 1159 __func__, __LINE__); 1160 ret = -ENODEV; 1161 goto err_free_fu; 1162 } 1163 } 1164 } 1165 1166 if (EPIN_EN(uac2_opts)) { 1167 agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); 1168 if (!agdev->in_ep) { 1169 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1170 ret = -ENODEV; 1171 goto err_free_fu; 1172 } 1173 } 1174 1175 agdev->in_ep_maxpsize = max_t(u16, 1176 le16_to_cpu(fs_epin_desc.wMaxPacketSize), 1177 le16_to_cpu(hs_epin_desc.wMaxPacketSize)); 1178 agdev->out_ep_maxpsize = max_t(u16, 1179 le16_to_cpu(fs_epout_desc.wMaxPacketSize), 1180 le16_to_cpu(hs_epout_desc.wMaxPacketSize)); 1181 1182 agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize, 1183 le16_to_cpu(ss_epin_desc.wMaxPacketSize)); 1184 agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize, 1185 le16_to_cpu(ss_epout_desc.wMaxPacketSize)); 1186 1187 ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize; 1188 ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize; 1189 1190 // HS and SS endpoint addresses are copied from autoconfigured FS descriptors 1191 hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1192 hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1193 hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1194 hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1195 ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1196 ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1197 ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1198 ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1199 1200 setup_descriptor(uac2_opts); 1201 1202 ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc, 1203 ss_audio_desc); 1204 if (ret) 1205 goto err_free_fu; 1206 1207 agdev->gadget = gadget; 1208 1209 agdev->params.p_chmask = uac2_opts->p_chmask; 1210 agdev->params.p_srate = uac2_opts->p_srate; 1211 agdev->params.p_ssize = uac2_opts->p_ssize; 1212 if (FUIN_EN(uac2_opts)) { 1213 agdev->params.p_fu.id = USB_IN_FU_ID; 1214 agdev->params.p_fu.mute_present = uac2_opts->p_mute_present; 1215 agdev->params.p_fu.volume_present = uac2_opts->p_volume_present; 1216 agdev->params.p_fu.volume_min = uac2_opts->p_volume_min; 1217 agdev->params.p_fu.volume_max = uac2_opts->p_volume_max; 1218 agdev->params.p_fu.volume_res = uac2_opts->p_volume_res; 1219 } 1220 agdev->params.c_chmask = uac2_opts->c_chmask; 1221 agdev->params.c_srate = uac2_opts->c_srate; 1222 agdev->params.c_ssize = uac2_opts->c_ssize; 1223 if (FUOUT_EN(uac2_opts)) { 1224 agdev->params.c_fu.id = USB_OUT_FU_ID; 1225 agdev->params.c_fu.mute_present = uac2_opts->c_mute_present; 1226 agdev->params.c_fu.volume_present = uac2_opts->c_volume_present; 1227 agdev->params.c_fu.volume_min = uac2_opts->c_volume_min; 1228 agdev->params.c_fu.volume_max = uac2_opts->c_volume_max; 1229 agdev->params.c_fu.volume_res = uac2_opts->c_volume_res; 1230 } 1231 agdev->params.req_number = uac2_opts->req_number; 1232 agdev->params.fb_max = uac2_opts->fb_max; 1233 1234 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) 1235 agdev->notify = afunc_notify; 1236 1237 ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); 1238 if (ret) 1239 goto err_free_descs; 1240 1241 return 0; 1242 1243 err_free_descs: 1244 usb_free_all_descriptors(fn); 1245 agdev->gadget = NULL; 1246 err_free_fu: 1247 kfree(out_feature_unit_desc); 1248 out_feature_unit_desc = NULL; 1249 kfree(in_feature_unit_desc); 1250 in_feature_unit_desc = NULL; 1251 return ret; 1252 } 1253 1254 static void 1255 afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req) 1256 { 1257 struct g_audio *agdev = req->context; 1258 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1259 1260 atomic_dec(&uac2->int_count); 1261 kfree(req->buf); 1262 usb_ep_free_request(_ep, req); 1263 } 1264 1265 static int 1266 afunc_notify(struct g_audio *agdev, int unit_id, int cs) 1267 { 1268 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1269 struct usb_request *req; 1270 struct uac2_interrupt_data_msg *msg; 1271 u16 w_index, w_value; 1272 int ret; 1273 1274 if (!uac2->int_ep->enabled) 1275 return 0; 1276 1277 if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) { 1278 atomic_dec(&uac2->int_count); 1279 return 0; 1280 } 1281 1282 req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC); 1283 if (req == NULL) { 1284 ret = -ENOMEM; 1285 goto err_dec_int_count; 1286 } 1287 1288 msg = kzalloc(sizeof(*msg), GFP_ATOMIC); 1289 if (msg == NULL) { 1290 ret = -ENOMEM; 1291 goto err_free_request; 1292 } 1293 1294 w_index = unit_id << 8 | uac2->ac_intf; 1295 w_value = cs << 8; 1296 1297 msg->bInfo = 0; /* Non-vendor, interface interrupt */ 1298 msg->bAttribute = UAC2_CS_CUR; 1299 msg->wIndex = cpu_to_le16(w_index); 1300 msg->wValue = cpu_to_le16(w_value); 1301 1302 req->length = sizeof(*msg); 1303 req->buf = msg; 1304 req->context = agdev; 1305 req->complete = afunc_notify_complete; 1306 1307 ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC); 1308 1309 if (ret) 1310 goto err_free_msg; 1311 1312 return 0; 1313 1314 err_free_msg: 1315 kfree(msg); 1316 err_free_request: 1317 usb_ep_free_request(uac2->int_ep, req); 1318 err_dec_int_count: 1319 atomic_dec(&uac2->int_count); 1320 1321 return ret; 1322 } 1323 1324 static int 1325 afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) 1326 { 1327 struct usb_composite_dev *cdev = fn->config->cdev; 1328 struct f_uac2 *uac2 = func_to_uac2(fn); 1329 struct g_audio *agdev = func_to_g_audio(fn); 1330 struct usb_gadget *gadget = cdev->gadget; 1331 struct device *dev = &gadget->dev; 1332 int ret = 0; 1333 1334 /* No i/f has more than 2 alt settings */ 1335 if (alt > 1) { 1336 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1337 return -EINVAL; 1338 } 1339 1340 if (intf == uac2->ac_intf) { 1341 /* Control I/f has only 1 AltSetting - 0 */ 1342 if (alt) { 1343 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1344 return -EINVAL; 1345 } 1346 1347 /* restart interrupt endpoint */ 1348 if (uac2->int_ep) { 1349 usb_ep_disable(uac2->int_ep); 1350 config_ep_by_speed(gadget, &agdev->func, uac2->int_ep); 1351 usb_ep_enable(uac2->int_ep); 1352 } 1353 1354 return 0; 1355 } 1356 1357 if (intf == uac2->as_out_intf) { 1358 uac2->as_out_alt = alt; 1359 1360 if (alt) 1361 ret = u_audio_start_capture(&uac2->g_audio); 1362 else 1363 u_audio_stop_capture(&uac2->g_audio); 1364 } else if (intf == uac2->as_in_intf) { 1365 uac2->as_in_alt = alt; 1366 1367 if (alt) 1368 ret = u_audio_start_playback(&uac2->g_audio); 1369 else 1370 u_audio_stop_playback(&uac2->g_audio); 1371 } else { 1372 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1373 return -EINVAL; 1374 } 1375 1376 return ret; 1377 } 1378 1379 static int 1380 afunc_get_alt(struct usb_function *fn, unsigned intf) 1381 { 1382 struct f_uac2 *uac2 = func_to_uac2(fn); 1383 struct g_audio *agdev = func_to_g_audio(fn); 1384 1385 if (intf == uac2->ac_intf) 1386 return uac2->ac_alt; 1387 else if (intf == uac2->as_out_intf) 1388 return uac2->as_out_alt; 1389 else if (intf == uac2->as_in_intf) 1390 return uac2->as_in_alt; 1391 else 1392 dev_err(&agdev->gadget->dev, 1393 "%s:%d Invalid Interface %d!\n", 1394 __func__, __LINE__, intf); 1395 1396 return -EINVAL; 1397 } 1398 1399 static void 1400 afunc_disable(struct usb_function *fn) 1401 { 1402 struct f_uac2 *uac2 = func_to_uac2(fn); 1403 1404 uac2->as_in_alt = 0; 1405 uac2->as_out_alt = 0; 1406 u_audio_stop_capture(&uac2->g_audio); 1407 u_audio_stop_playback(&uac2->g_audio); 1408 if (uac2->int_ep) 1409 usb_ep_disable(uac2->int_ep); 1410 } 1411 1412 static int 1413 in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1414 { 1415 struct usb_request *req = fn->config->cdev->req; 1416 struct g_audio *agdev = func_to_g_audio(fn); 1417 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1418 u16 w_length = le16_to_cpu(cr->wLength); 1419 u16 w_index = le16_to_cpu(cr->wIndex); 1420 u16 w_value = le16_to_cpu(cr->wValue); 1421 u8 entity_id = (w_index >> 8) & 0xff; 1422 u8 control_selector = w_value >> 8; 1423 int value = -EOPNOTSUPP; 1424 int p_srate, c_srate; 1425 1426 p_srate = opts->p_srate; 1427 c_srate = opts->c_srate; 1428 1429 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1430 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1431 struct cntrl_cur_lay3 c; 1432 1433 memset(&c, 0, sizeof(struct cntrl_cur_lay3)); 1434 1435 if (entity_id == USB_IN_CLK_ID) 1436 c.dCUR = cpu_to_le32(p_srate); 1437 else if (entity_id == USB_OUT_CLK_ID) 1438 c.dCUR = cpu_to_le32(c_srate); 1439 1440 value = min_t(unsigned int, w_length, sizeof(c)); 1441 memcpy(req->buf, &c, value); 1442 } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { 1443 *(u8 *)req->buf = 1; 1444 value = min_t(unsigned int, w_length, 1); 1445 } else { 1446 dev_err(&agdev->gadget->dev, 1447 "%s:%d control_selector=%d TODO!\n", 1448 __func__, __LINE__, control_selector); 1449 } 1450 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1451 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1452 unsigned int is_playback = 0; 1453 1454 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1455 is_playback = 1; 1456 1457 if (control_selector == UAC_FU_MUTE) { 1458 unsigned int mute; 1459 1460 u_audio_get_mute(agdev, is_playback, &mute); 1461 1462 *(u8 *)req->buf = mute; 1463 value = min_t(unsigned int, w_length, 1); 1464 } else if (control_selector == UAC_FU_VOLUME) { 1465 struct cntrl_cur_lay2 c; 1466 s16 volume; 1467 1468 memset(&c, 0, sizeof(struct cntrl_cur_lay2)); 1469 1470 u_audio_get_volume(agdev, is_playback, &volume); 1471 c.wCUR = cpu_to_le16(volume); 1472 1473 value = min_t(unsigned int, w_length, sizeof(c)); 1474 memcpy(req->buf, &c, value); 1475 } else { 1476 dev_err(&agdev->gadget->dev, 1477 "%s:%d control_selector=%d TODO!\n", 1478 __func__, __LINE__, control_selector); 1479 } 1480 } else { 1481 dev_err(&agdev->gadget->dev, 1482 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1483 __func__, __LINE__, entity_id, control_selector); 1484 } 1485 1486 return value; 1487 } 1488 1489 static int 1490 in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1491 { 1492 struct usb_request *req = fn->config->cdev->req; 1493 struct g_audio *agdev = func_to_g_audio(fn); 1494 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1495 u16 w_length = le16_to_cpu(cr->wLength); 1496 u16 w_index = le16_to_cpu(cr->wIndex); 1497 u16 w_value = le16_to_cpu(cr->wValue); 1498 u8 entity_id = (w_index >> 8) & 0xff; 1499 u8 control_selector = w_value >> 8; 1500 int value = -EOPNOTSUPP; 1501 int p_srate, c_srate; 1502 1503 p_srate = opts->p_srate; 1504 c_srate = opts->c_srate; 1505 1506 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1507 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1508 struct cntrl_range_lay3 r; 1509 1510 if (entity_id == USB_IN_CLK_ID) 1511 r.dMIN = cpu_to_le32(p_srate); 1512 else if (entity_id == USB_OUT_CLK_ID) 1513 r.dMIN = cpu_to_le32(c_srate); 1514 else 1515 return -EOPNOTSUPP; 1516 1517 r.dMAX = r.dMIN; 1518 r.dRES = 0; 1519 r.wNumSubRanges = cpu_to_le16(1); 1520 1521 value = min_t(unsigned int, w_length, sizeof(r)); 1522 memcpy(req->buf, &r, value); 1523 } else { 1524 dev_err(&agdev->gadget->dev, 1525 "%s:%d control_selector=%d TODO!\n", 1526 __func__, __LINE__, control_selector); 1527 } 1528 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1529 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1530 unsigned int is_playback = 0; 1531 1532 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1533 is_playback = 1; 1534 1535 if (control_selector == UAC_FU_VOLUME) { 1536 struct cntrl_range_lay2 r; 1537 s16 max_db, min_db, res_db; 1538 1539 if (is_playback) { 1540 max_db = opts->p_volume_max; 1541 min_db = opts->p_volume_min; 1542 res_db = opts->p_volume_res; 1543 } else { 1544 max_db = opts->c_volume_max; 1545 min_db = opts->c_volume_min; 1546 res_db = opts->c_volume_res; 1547 } 1548 1549 r.wMAX = cpu_to_le16(max_db); 1550 r.wMIN = cpu_to_le16(min_db); 1551 r.wRES = cpu_to_le16(res_db); 1552 r.wNumSubRanges = cpu_to_le16(1); 1553 1554 value = min_t(unsigned int, w_length, sizeof(r)); 1555 memcpy(req->buf, &r, value); 1556 } else { 1557 dev_err(&agdev->gadget->dev, 1558 "%s:%d control_selector=%d TODO!\n", 1559 __func__, __LINE__, control_selector); 1560 } 1561 } else { 1562 dev_err(&agdev->gadget->dev, 1563 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1564 __func__, __LINE__, entity_id, control_selector); 1565 } 1566 1567 return value; 1568 } 1569 1570 static int 1571 ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1572 { 1573 if (cr->bRequest == UAC2_CS_CUR) 1574 return in_rq_cur(fn, cr); 1575 else if (cr->bRequest == UAC2_CS_RANGE) 1576 return in_rq_range(fn, cr); 1577 else 1578 return -EOPNOTSUPP; 1579 } 1580 1581 static void 1582 out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) 1583 { 1584 struct g_audio *agdev = req->context; 1585 struct usb_composite_dev *cdev = agdev->func.config->cdev; 1586 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1587 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1588 struct usb_ctrlrequest *cr = &uac2->setup_cr; 1589 u16 w_index = le16_to_cpu(cr->wIndex); 1590 u16 w_value = le16_to_cpu(cr->wValue); 1591 u8 entity_id = (w_index >> 8) & 0xff; 1592 u8 control_selector = w_value >> 8; 1593 1594 if (req->status != 0) { 1595 dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status); 1596 return; 1597 } 1598 1599 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1600 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1601 unsigned int is_playback = 0; 1602 1603 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1604 is_playback = 1; 1605 1606 if (control_selector == UAC_FU_MUTE) { 1607 u8 mute = *(u8 *)req->buf; 1608 1609 u_audio_set_mute(agdev, is_playback, mute); 1610 1611 return; 1612 } else if (control_selector == UAC_FU_VOLUME) { 1613 struct cntrl_cur_lay2 *c = req->buf; 1614 s16 volume; 1615 1616 volume = le16_to_cpu(c->wCUR); 1617 u_audio_set_volume(agdev, is_playback, volume); 1618 1619 return; 1620 } else { 1621 dev_err(&agdev->gadget->dev, 1622 "%s:%d control_selector=%d TODO!\n", 1623 __func__, __LINE__, control_selector); 1624 usb_ep_set_halt(ep); 1625 } 1626 } 1627 } 1628 1629 static int 1630 out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1631 { 1632 struct usb_request *req = fn->config->cdev->req; 1633 struct g_audio *agdev = func_to_g_audio(fn); 1634 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1635 struct f_uac2 *uac2 = func_to_uac2(fn); 1636 u16 w_length = le16_to_cpu(cr->wLength); 1637 u16 w_index = le16_to_cpu(cr->wIndex); 1638 u16 w_value = le16_to_cpu(cr->wValue); 1639 u8 entity_id = (w_index >> 8) & 0xff; 1640 u8 control_selector = w_value >> 8; 1641 1642 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1643 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) 1644 return w_length; 1645 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1646 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1647 memcpy(&uac2->setup_cr, cr, sizeof(*cr)); 1648 req->context = agdev; 1649 req->complete = out_rq_cur_complete; 1650 1651 return w_length; 1652 } else { 1653 dev_err(&agdev->gadget->dev, 1654 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1655 __func__, __LINE__, entity_id, control_selector); 1656 } 1657 return -EOPNOTSUPP; 1658 } 1659 1660 static int 1661 setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1662 { 1663 struct f_uac2 *uac2 = func_to_uac2(fn); 1664 struct g_audio *agdev = func_to_g_audio(fn); 1665 u16 w_index = le16_to_cpu(cr->wIndex); 1666 u8 intf = w_index & 0xff; 1667 1668 if (intf != uac2->ac_intf) { 1669 dev_err(&agdev->gadget->dev, 1670 "%s:%d Error!\n", __func__, __LINE__); 1671 return -EOPNOTSUPP; 1672 } 1673 1674 if (cr->bRequestType & USB_DIR_IN) 1675 return ac_rq_in(fn, cr); 1676 else if (cr->bRequest == UAC2_CS_CUR) 1677 return out_rq_cur(fn, cr); 1678 1679 return -EOPNOTSUPP; 1680 } 1681 1682 static int 1683 afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1684 { 1685 struct usb_composite_dev *cdev = fn->config->cdev; 1686 struct g_audio *agdev = func_to_g_audio(fn); 1687 struct usb_request *req = cdev->req; 1688 u16 w_length = le16_to_cpu(cr->wLength); 1689 int value = -EOPNOTSUPP; 1690 1691 /* Only Class specific requests are supposed to reach here */ 1692 if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) 1693 return -EOPNOTSUPP; 1694 1695 if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) 1696 value = setup_rq_inf(fn, cr); 1697 else 1698 dev_err(&agdev->gadget->dev, "%s:%d Error!\n", 1699 __func__, __LINE__); 1700 1701 if (value >= 0) { 1702 req->length = value; 1703 req->zero = value < w_length; 1704 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); 1705 if (value < 0) { 1706 dev_err(&agdev->gadget->dev, 1707 "%s:%d Error!\n", __func__, __LINE__); 1708 req->status = 0; 1709 } 1710 } 1711 1712 return value; 1713 } 1714 1715 static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) 1716 { 1717 return container_of(to_config_group(item), struct f_uac2_opts, 1718 func_inst.group); 1719 } 1720 1721 static void f_uac2_attr_release(struct config_item *item) 1722 { 1723 struct f_uac2_opts *opts = to_f_uac2_opts(item); 1724 1725 usb_put_function_instance(&opts->func_inst); 1726 } 1727 1728 static struct configfs_item_operations f_uac2_item_ops = { 1729 .release = f_uac2_attr_release, 1730 }; 1731 1732 #define uac2_kstrtou32 kstrtou32 1733 #define uac2_kstrtos16 kstrtos16 1734 #define uac2_kstrtobool(s, base, res) kstrtobool((s), (res)) 1735 1736 static const char *u32_fmt = "%u\n"; 1737 static const char *s16_fmt = "%hd\n"; 1738 static const char *bool_fmt = "%u\n"; 1739 1740 #define UAC2_ATTRIBUTE(type, name) \ 1741 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1742 char *page) \ 1743 { \ 1744 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1745 int result; \ 1746 \ 1747 mutex_lock(&opts->lock); \ 1748 result = sprintf(page, type##_fmt, opts->name); \ 1749 mutex_unlock(&opts->lock); \ 1750 \ 1751 return result; \ 1752 } \ 1753 \ 1754 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1755 const char *page, size_t len) \ 1756 { \ 1757 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1758 int ret; \ 1759 type num; \ 1760 \ 1761 mutex_lock(&opts->lock); \ 1762 if (opts->refcnt) { \ 1763 ret = -EBUSY; \ 1764 goto end; \ 1765 } \ 1766 \ 1767 ret = uac2_kstrto##type(page, 0, &num); \ 1768 if (ret) \ 1769 goto end; \ 1770 \ 1771 opts->name = num; \ 1772 ret = len; \ 1773 \ 1774 end: \ 1775 mutex_unlock(&opts->lock); \ 1776 return ret; \ 1777 } \ 1778 \ 1779 CONFIGFS_ATTR(f_uac2_opts_, name) 1780 1781 #define UAC2_ATTRIBUTE_SYNC(name) \ 1782 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1783 char *page) \ 1784 { \ 1785 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1786 int result; \ 1787 char *str; \ 1788 \ 1789 mutex_lock(&opts->lock); \ 1790 switch (opts->name) { \ 1791 case USB_ENDPOINT_SYNC_ASYNC: \ 1792 str = "async"; \ 1793 break; \ 1794 case USB_ENDPOINT_SYNC_ADAPTIVE: \ 1795 str = "adaptive"; \ 1796 break; \ 1797 default: \ 1798 str = "unknown"; \ 1799 break; \ 1800 } \ 1801 result = sprintf(page, "%s\n", str); \ 1802 mutex_unlock(&opts->lock); \ 1803 \ 1804 return result; \ 1805 } \ 1806 \ 1807 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1808 const char *page, size_t len) \ 1809 { \ 1810 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1811 int ret = 0; \ 1812 \ 1813 mutex_lock(&opts->lock); \ 1814 if (opts->refcnt) { \ 1815 ret = -EBUSY; \ 1816 goto end; \ 1817 } \ 1818 \ 1819 if (!strncmp(page, "async", 5)) \ 1820 opts->name = USB_ENDPOINT_SYNC_ASYNC; \ 1821 else if (!strncmp(page, "adaptive", 8)) \ 1822 opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \ 1823 else { \ 1824 ret = -EINVAL; \ 1825 goto end; \ 1826 } \ 1827 \ 1828 ret = len; \ 1829 \ 1830 end: \ 1831 mutex_unlock(&opts->lock); \ 1832 return ret; \ 1833 } \ 1834 \ 1835 CONFIGFS_ATTR(f_uac2_opts_, name) 1836 1837 UAC2_ATTRIBUTE(u32, p_chmask); 1838 UAC2_ATTRIBUTE(u32, p_srate); 1839 UAC2_ATTRIBUTE(u32, p_ssize); 1840 UAC2_ATTRIBUTE(u32, c_chmask); 1841 UAC2_ATTRIBUTE(u32, c_srate); 1842 UAC2_ATTRIBUTE_SYNC(c_sync); 1843 UAC2_ATTRIBUTE(u32, c_ssize); 1844 UAC2_ATTRIBUTE(u32, req_number); 1845 1846 UAC2_ATTRIBUTE(bool, p_mute_present); 1847 UAC2_ATTRIBUTE(bool, p_volume_present); 1848 UAC2_ATTRIBUTE(s16, p_volume_min); 1849 UAC2_ATTRIBUTE(s16, p_volume_max); 1850 UAC2_ATTRIBUTE(s16, p_volume_res); 1851 1852 UAC2_ATTRIBUTE(bool, c_mute_present); 1853 UAC2_ATTRIBUTE(bool, c_volume_present); 1854 UAC2_ATTRIBUTE(s16, c_volume_min); 1855 UAC2_ATTRIBUTE(s16, c_volume_max); 1856 UAC2_ATTRIBUTE(s16, c_volume_res); 1857 UAC2_ATTRIBUTE(u32, fb_max); 1858 1859 static struct configfs_attribute *f_uac2_attrs[] = { 1860 &f_uac2_opts_attr_p_chmask, 1861 &f_uac2_opts_attr_p_srate, 1862 &f_uac2_opts_attr_p_ssize, 1863 &f_uac2_opts_attr_c_chmask, 1864 &f_uac2_opts_attr_c_srate, 1865 &f_uac2_opts_attr_c_ssize, 1866 &f_uac2_opts_attr_c_sync, 1867 &f_uac2_opts_attr_req_number, 1868 &f_uac2_opts_attr_fb_max, 1869 1870 &f_uac2_opts_attr_p_mute_present, 1871 &f_uac2_opts_attr_p_volume_present, 1872 &f_uac2_opts_attr_p_volume_min, 1873 &f_uac2_opts_attr_p_volume_max, 1874 &f_uac2_opts_attr_p_volume_res, 1875 1876 &f_uac2_opts_attr_c_mute_present, 1877 &f_uac2_opts_attr_c_volume_present, 1878 &f_uac2_opts_attr_c_volume_min, 1879 &f_uac2_opts_attr_c_volume_max, 1880 &f_uac2_opts_attr_c_volume_res, 1881 1882 NULL, 1883 }; 1884 1885 static const struct config_item_type f_uac2_func_type = { 1886 .ct_item_ops = &f_uac2_item_ops, 1887 .ct_attrs = f_uac2_attrs, 1888 .ct_owner = THIS_MODULE, 1889 }; 1890 1891 static void afunc_free_inst(struct usb_function_instance *f) 1892 { 1893 struct f_uac2_opts *opts; 1894 1895 opts = container_of(f, struct f_uac2_opts, func_inst); 1896 kfree(opts); 1897 } 1898 1899 static struct usb_function_instance *afunc_alloc_inst(void) 1900 { 1901 struct f_uac2_opts *opts; 1902 1903 opts = kzalloc(sizeof(*opts), GFP_KERNEL); 1904 if (!opts) 1905 return ERR_PTR(-ENOMEM); 1906 1907 mutex_init(&opts->lock); 1908 opts->func_inst.free_func_inst = afunc_free_inst; 1909 1910 config_group_init_type_name(&opts->func_inst.group, "", 1911 &f_uac2_func_type); 1912 1913 opts->p_chmask = UAC2_DEF_PCHMASK; 1914 opts->p_srate = UAC2_DEF_PSRATE; 1915 opts->p_ssize = UAC2_DEF_PSSIZE; 1916 opts->c_chmask = UAC2_DEF_CCHMASK; 1917 opts->c_srate = UAC2_DEF_CSRATE; 1918 opts->c_ssize = UAC2_DEF_CSSIZE; 1919 opts->c_sync = UAC2_DEF_CSYNC; 1920 1921 opts->p_mute_present = UAC2_DEF_MUTE_PRESENT; 1922 opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT; 1923 opts->p_volume_min = UAC2_DEF_MIN_DB; 1924 opts->p_volume_max = UAC2_DEF_MAX_DB; 1925 opts->p_volume_res = UAC2_DEF_RES_DB; 1926 1927 opts->c_mute_present = UAC2_DEF_MUTE_PRESENT; 1928 opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT; 1929 opts->c_volume_min = UAC2_DEF_MIN_DB; 1930 opts->c_volume_max = UAC2_DEF_MAX_DB; 1931 opts->c_volume_res = UAC2_DEF_RES_DB; 1932 1933 opts->req_number = UAC2_DEF_REQ_NUM; 1934 opts->fb_max = UAC2_DEF_FB_MAX; 1935 return &opts->func_inst; 1936 } 1937 1938 static void afunc_free(struct usb_function *f) 1939 { 1940 struct g_audio *agdev; 1941 struct f_uac2_opts *opts; 1942 1943 agdev = func_to_g_audio(f); 1944 opts = container_of(f->fi, struct f_uac2_opts, func_inst); 1945 kfree(agdev); 1946 mutex_lock(&opts->lock); 1947 --opts->refcnt; 1948 mutex_unlock(&opts->lock); 1949 } 1950 1951 static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) 1952 { 1953 struct g_audio *agdev = func_to_g_audio(f); 1954 1955 g_audio_cleanup(agdev); 1956 usb_free_all_descriptors(f); 1957 1958 agdev->gadget = NULL; 1959 1960 kfree(out_feature_unit_desc); 1961 out_feature_unit_desc = NULL; 1962 kfree(in_feature_unit_desc); 1963 in_feature_unit_desc = NULL; 1964 } 1965 1966 static struct usb_function *afunc_alloc(struct usb_function_instance *fi) 1967 { 1968 struct f_uac2 *uac2; 1969 struct f_uac2_opts *opts; 1970 1971 uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); 1972 if (uac2 == NULL) 1973 return ERR_PTR(-ENOMEM); 1974 1975 opts = container_of(fi, struct f_uac2_opts, func_inst); 1976 mutex_lock(&opts->lock); 1977 ++opts->refcnt; 1978 mutex_unlock(&opts->lock); 1979 1980 uac2->g_audio.func.name = "uac2_func"; 1981 uac2->g_audio.func.bind = afunc_bind; 1982 uac2->g_audio.func.unbind = afunc_unbind; 1983 uac2->g_audio.func.set_alt = afunc_set_alt; 1984 uac2->g_audio.func.get_alt = afunc_get_alt; 1985 uac2->g_audio.func.disable = afunc_disable; 1986 uac2->g_audio.func.setup = afunc_setup; 1987 uac2->g_audio.func.free_func = afunc_free; 1988 1989 return &uac2->g_audio.func; 1990 } 1991 1992 DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); 1993 MODULE_LICENSE("GPL"); 1994 MODULE_AUTHOR("Yadwinder Singh"); 1995 MODULE_AUTHOR("Jaswinder Singh"); 1996 MODULE_AUTHOR("Ruslan Bilovol"); 1997