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 srate = srate * (1000 + uac2_opts->fb_max) / 1000; 679 680 max_size_bw = num_channels(chmask) * ssize * 681 DIV_ROUND_UP(srate, factor / (1 << (ep_desc->bInterval - 1))); 682 ep_desc->wMaxPacketSize = cpu_to_le16(min_t(u16, max_size_bw, 683 max_size_ep)); 684 685 return 0; 686 } 687 688 static struct uac2_feature_unit_descriptor *build_fu_desc(int chmask) 689 { 690 struct uac2_feature_unit_descriptor *fu_desc; 691 int channels = num_channels(chmask); 692 int fu_desc_size = UAC2_DT_FEATURE_UNIT_SIZE(channels); 693 694 fu_desc = kzalloc(fu_desc_size, GFP_KERNEL); 695 if (!fu_desc) 696 return NULL; 697 698 fu_desc->bLength = fu_desc_size; 699 fu_desc->bDescriptorType = USB_DT_CS_INTERFACE; 700 701 fu_desc->bDescriptorSubtype = UAC_FEATURE_UNIT; 702 703 /* bUnitID, bSourceID and bmaControls will be defined later */ 704 705 return fu_desc; 706 } 707 708 /* Use macro to overcome line length limitation */ 709 #define USBDHDR(p) (struct usb_descriptor_header *)(p) 710 711 static void setup_headers(struct f_uac2_opts *opts, 712 struct usb_descriptor_header **headers, 713 enum usb_device_speed speed) 714 { 715 struct usb_ss_ep_comp_descriptor *epout_desc_comp = NULL; 716 struct usb_ss_ep_comp_descriptor *epin_desc_comp = NULL; 717 struct usb_ss_ep_comp_descriptor *epin_fback_desc_comp = NULL; 718 struct usb_endpoint_descriptor *epout_desc; 719 struct usb_endpoint_descriptor *epin_desc; 720 struct usb_endpoint_descriptor *epin_fback_desc; 721 struct usb_endpoint_descriptor *ep_int_desc; 722 int i; 723 724 switch (speed) { 725 case USB_SPEED_FULL: 726 epout_desc = &fs_epout_desc; 727 epin_desc = &fs_epin_desc; 728 epin_fback_desc = &fs_epin_fback_desc; 729 ep_int_desc = &fs_ep_int_desc; 730 break; 731 case USB_SPEED_HIGH: 732 epout_desc = &hs_epout_desc; 733 epin_desc = &hs_epin_desc; 734 epin_fback_desc = &hs_epin_fback_desc; 735 ep_int_desc = &hs_ep_int_desc; 736 break; 737 default: 738 epout_desc = &ss_epout_desc; 739 epin_desc = &ss_epin_desc; 740 epout_desc_comp = &ss_epout_desc_comp; 741 epin_desc_comp = &ss_epin_desc_comp; 742 epin_fback_desc = &ss_epin_fback_desc; 743 epin_fback_desc_comp = &ss_epin_fback_desc_comp; 744 ep_int_desc = &ss_ep_int_desc; 745 } 746 747 i = 0; 748 headers[i++] = USBDHDR(&iad_desc); 749 headers[i++] = USBDHDR(&std_ac_if_desc); 750 headers[i++] = USBDHDR(&ac_hdr_desc); 751 if (EPIN_EN(opts)) 752 headers[i++] = USBDHDR(&in_clk_src_desc); 753 if (EPOUT_EN(opts)) { 754 headers[i++] = USBDHDR(&out_clk_src_desc); 755 headers[i++] = USBDHDR(&usb_out_it_desc); 756 757 if (FUOUT_EN(opts)) 758 headers[i++] = USBDHDR(out_feature_unit_desc); 759 } 760 761 if (EPIN_EN(opts)) { 762 headers[i++] = USBDHDR(&io_in_it_desc); 763 764 if (FUIN_EN(opts)) 765 headers[i++] = USBDHDR(in_feature_unit_desc); 766 767 headers[i++] = USBDHDR(&usb_in_ot_desc); 768 } 769 770 if (EPOUT_EN(opts)) 771 headers[i++] = USBDHDR(&io_out_ot_desc); 772 773 if (FUOUT_EN(opts) || FUIN_EN(opts)) 774 headers[i++] = USBDHDR(ep_int_desc); 775 776 if (EPOUT_EN(opts)) { 777 headers[i++] = USBDHDR(&std_as_out_if0_desc); 778 headers[i++] = USBDHDR(&std_as_out_if1_desc); 779 headers[i++] = USBDHDR(&as_out_hdr_desc); 780 headers[i++] = USBDHDR(&as_out_fmt1_desc); 781 headers[i++] = USBDHDR(epout_desc); 782 if (epout_desc_comp) 783 headers[i++] = USBDHDR(epout_desc_comp); 784 785 headers[i++] = USBDHDR(&as_iso_out_desc); 786 787 if (EPOUT_FBACK_IN_EN(opts)) { 788 headers[i++] = USBDHDR(epin_fback_desc); 789 if (epin_fback_desc_comp) 790 headers[i++] = USBDHDR(epin_fback_desc_comp); 791 } 792 } 793 794 if (EPIN_EN(opts)) { 795 headers[i++] = USBDHDR(&std_as_in_if0_desc); 796 headers[i++] = USBDHDR(&std_as_in_if1_desc); 797 headers[i++] = USBDHDR(&as_in_hdr_desc); 798 headers[i++] = USBDHDR(&as_in_fmt1_desc); 799 headers[i++] = USBDHDR(epin_desc); 800 if (epin_desc_comp) 801 headers[i++] = USBDHDR(epin_desc_comp); 802 803 headers[i++] = USBDHDR(&as_iso_in_desc); 804 } 805 headers[i] = NULL; 806 } 807 808 static void setup_descriptor(struct f_uac2_opts *opts) 809 { 810 /* patch descriptors */ 811 int i = 1; /* ID's start with 1 */ 812 813 if (EPOUT_EN(opts)) 814 usb_out_it_desc.bTerminalID = i++; 815 if (EPIN_EN(opts)) 816 io_in_it_desc.bTerminalID = i++; 817 if (EPOUT_EN(opts)) 818 io_out_ot_desc.bTerminalID = i++; 819 if (EPIN_EN(opts)) 820 usb_in_ot_desc.bTerminalID = i++; 821 if (FUOUT_EN(opts)) 822 out_feature_unit_desc->bUnitID = i++; 823 if (FUIN_EN(opts)) 824 in_feature_unit_desc->bUnitID = i++; 825 if (EPOUT_EN(opts)) 826 out_clk_src_desc.bClockID = i++; 827 if (EPIN_EN(opts)) 828 in_clk_src_desc.bClockID = i++; 829 830 usb_out_it_desc.bCSourceID = out_clk_src_desc.bClockID; 831 832 if (FUIN_EN(opts)) { 833 usb_in_ot_desc.bSourceID = in_feature_unit_desc->bUnitID; 834 in_feature_unit_desc->bSourceID = io_in_it_desc.bTerminalID; 835 } else { 836 usb_in_ot_desc.bSourceID = io_in_it_desc.bTerminalID; 837 } 838 839 usb_in_ot_desc.bCSourceID = in_clk_src_desc.bClockID; 840 io_in_it_desc.bCSourceID = in_clk_src_desc.bClockID; 841 io_out_ot_desc.bCSourceID = out_clk_src_desc.bClockID; 842 843 if (FUOUT_EN(opts)) { 844 io_out_ot_desc.bSourceID = out_feature_unit_desc->bUnitID; 845 out_feature_unit_desc->bSourceID = usb_out_it_desc.bTerminalID; 846 } else { 847 io_out_ot_desc.bSourceID = usb_out_it_desc.bTerminalID; 848 } 849 850 as_out_hdr_desc.bTerminalLink = usb_out_it_desc.bTerminalID; 851 as_in_hdr_desc.bTerminalLink = usb_in_ot_desc.bTerminalID; 852 853 iad_desc.bInterfaceCount = 1; 854 ac_hdr_desc.wTotalLength = cpu_to_le16(sizeof(ac_hdr_desc)); 855 856 if (EPIN_EN(opts)) { 857 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 858 859 len += sizeof(in_clk_src_desc); 860 len += sizeof(usb_in_ot_desc); 861 862 if (FUIN_EN(opts)) 863 len += in_feature_unit_desc->bLength; 864 865 len += sizeof(io_in_it_desc); 866 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 867 iad_desc.bInterfaceCount++; 868 } 869 if (EPOUT_EN(opts)) { 870 u16 len = le16_to_cpu(ac_hdr_desc.wTotalLength); 871 872 len += sizeof(out_clk_src_desc); 873 len += sizeof(usb_out_it_desc); 874 875 if (FUOUT_EN(opts)) 876 len += out_feature_unit_desc->bLength; 877 878 len += sizeof(io_out_ot_desc); 879 ac_hdr_desc.wTotalLength = cpu_to_le16(len); 880 iad_desc.bInterfaceCount++; 881 } 882 883 setup_headers(opts, fs_audio_desc, USB_SPEED_FULL); 884 setup_headers(opts, hs_audio_desc, USB_SPEED_HIGH); 885 setup_headers(opts, ss_audio_desc, USB_SPEED_SUPER); 886 } 887 888 static int afunc_validate_opts(struct g_audio *agdev, struct device *dev) 889 { 890 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 891 892 if (!opts->p_chmask && !opts->c_chmask) { 893 dev_err(dev, "Error: no playback and capture channels\n"); 894 return -EINVAL; 895 } else if (opts->p_chmask & ~UAC2_CHANNEL_MASK) { 896 dev_err(dev, "Error: unsupported playback channels mask\n"); 897 return -EINVAL; 898 } else if (opts->c_chmask & ~UAC2_CHANNEL_MASK) { 899 dev_err(dev, "Error: unsupported capture channels mask\n"); 900 return -EINVAL; 901 } else if ((opts->p_ssize < 1) || (opts->p_ssize > 4)) { 902 dev_err(dev, "Error: incorrect playback sample size\n"); 903 return -EINVAL; 904 } else if ((opts->c_ssize < 1) || (opts->c_ssize > 4)) { 905 dev_err(dev, "Error: incorrect capture sample size\n"); 906 return -EINVAL; 907 } else if (!opts->p_srate) { 908 dev_err(dev, "Error: incorrect playback sampling rate\n"); 909 return -EINVAL; 910 } else if (!opts->c_srate) { 911 dev_err(dev, "Error: incorrect capture sampling rate\n"); 912 return -EINVAL; 913 } 914 915 if (opts->p_volume_max <= opts->p_volume_min) { 916 dev_err(dev, "Error: incorrect playback volume max/min\n"); 917 return -EINVAL; 918 } else if (opts->c_volume_max <= opts->c_volume_min) { 919 dev_err(dev, "Error: incorrect capture volume max/min\n"); 920 return -EINVAL; 921 } else if (opts->p_volume_res <= 0) { 922 dev_err(dev, "Error: negative/zero playback volume resolution\n"); 923 return -EINVAL; 924 } else if (opts->c_volume_res <= 0) { 925 dev_err(dev, "Error: negative/zero capture volume resolution\n"); 926 return -EINVAL; 927 } 928 929 if ((opts->p_volume_max - opts->p_volume_min) % opts->p_volume_res) { 930 dev_err(dev, "Error: incorrect playback volume resolution\n"); 931 return -EINVAL; 932 } else if ((opts->c_volume_max - opts->c_volume_min) % opts->c_volume_res) { 933 dev_err(dev, "Error: incorrect capture volume resolution\n"); 934 return -EINVAL; 935 } 936 937 return 0; 938 } 939 940 static int 941 afunc_bind(struct usb_configuration *cfg, struct usb_function *fn) 942 { 943 struct f_uac2 *uac2 = func_to_uac2(fn); 944 struct g_audio *agdev = func_to_g_audio(fn); 945 struct usb_composite_dev *cdev = cfg->cdev; 946 struct usb_gadget *gadget = cdev->gadget; 947 struct device *dev = &gadget->dev; 948 struct f_uac2_opts *uac2_opts = g_audio_to_uac2_opts(agdev); 949 struct usb_string *us; 950 int ret; 951 952 ret = afunc_validate_opts(agdev, dev); 953 if (ret) 954 return ret; 955 956 us = usb_gstrings_attach(cdev, fn_strings, ARRAY_SIZE(strings_fn)); 957 if (IS_ERR(us)) 958 return PTR_ERR(us); 959 960 if (FUOUT_EN(uac2_opts)) { 961 out_feature_unit_desc = build_fu_desc(uac2_opts->c_chmask); 962 if (!out_feature_unit_desc) 963 return -ENOMEM; 964 } 965 if (FUIN_EN(uac2_opts)) { 966 in_feature_unit_desc = build_fu_desc(uac2_opts->p_chmask); 967 if (!in_feature_unit_desc) { 968 ret = -ENOMEM; 969 goto err_free_fu; 970 } 971 } 972 973 iad_desc.iFunction = us[STR_ASSOC].id; 974 std_ac_if_desc.iInterface = us[STR_IF_CTRL].id; 975 in_clk_src_desc.iClockSource = us[STR_CLKSRC_IN].id; 976 out_clk_src_desc.iClockSource = us[STR_CLKSRC_OUT].id; 977 usb_out_it_desc.iTerminal = us[STR_USB_IT].id; 978 io_in_it_desc.iTerminal = us[STR_IO_IT].id; 979 usb_in_ot_desc.iTerminal = us[STR_USB_OT].id; 980 io_out_ot_desc.iTerminal = us[STR_IO_OT].id; 981 std_as_out_if0_desc.iInterface = us[STR_AS_OUT_ALT0].id; 982 std_as_out_if1_desc.iInterface = us[STR_AS_OUT_ALT1].id; 983 std_as_in_if0_desc.iInterface = us[STR_AS_IN_ALT0].id; 984 std_as_in_if1_desc.iInterface = us[STR_AS_IN_ALT1].id; 985 986 if (FUOUT_EN(uac2_opts)) { 987 u8 *i_feature = (u8 *)out_feature_unit_desc + 988 out_feature_unit_desc->bLength - 1; 989 *i_feature = us[STR_FU_OUT].id; 990 } 991 if (FUIN_EN(uac2_opts)) { 992 u8 *i_feature = (u8 *)in_feature_unit_desc + 993 in_feature_unit_desc->bLength - 1; 994 *i_feature = us[STR_FU_IN].id; 995 } 996 997 998 /* Initialize the configurable parameters */ 999 usb_out_it_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1000 usb_out_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1001 io_in_it_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1002 io_in_it_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1003 as_out_hdr_desc.bNrChannels = num_channels(uac2_opts->c_chmask); 1004 as_out_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->c_chmask); 1005 as_in_hdr_desc.bNrChannels = num_channels(uac2_opts->p_chmask); 1006 as_in_hdr_desc.bmChannelConfig = cpu_to_le32(uac2_opts->p_chmask); 1007 as_out_fmt1_desc.bSubslotSize = uac2_opts->c_ssize; 1008 as_out_fmt1_desc.bBitResolution = uac2_opts->c_ssize * 8; 1009 as_in_fmt1_desc.bSubslotSize = uac2_opts->p_ssize; 1010 as_in_fmt1_desc.bBitResolution = uac2_opts->p_ssize * 8; 1011 if (FUOUT_EN(uac2_opts)) { 1012 __le32 *bma = (__le32 *)&out_feature_unit_desc->bmaControls[0]; 1013 u32 control = 0; 1014 1015 if (uac2_opts->c_mute_present) 1016 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1017 if (uac2_opts->c_volume_present) 1018 control |= CONTROL_RDWR << FU_VOL_CTRL; 1019 *bma = cpu_to_le32(control); 1020 } 1021 if (FUIN_EN(uac2_opts)) { 1022 __le32 *bma = (__le32 *)&in_feature_unit_desc->bmaControls[0]; 1023 u32 control = 0; 1024 1025 if (uac2_opts->p_mute_present) 1026 control |= CONTROL_RDWR << FU_MUTE_CTRL; 1027 if (uac2_opts->p_volume_present) 1028 control |= CONTROL_RDWR << FU_VOL_CTRL; 1029 *bma = cpu_to_le32(control); 1030 } 1031 1032 snprintf(clksrc_in, sizeof(clksrc_in), "%uHz", uac2_opts->p_srate); 1033 snprintf(clksrc_out, sizeof(clksrc_out), "%uHz", uac2_opts->c_srate); 1034 1035 ret = usb_interface_id(cfg, fn); 1036 if (ret < 0) { 1037 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1038 goto err_free_fu; 1039 } 1040 iad_desc.bFirstInterface = ret; 1041 1042 std_ac_if_desc.bInterfaceNumber = ret; 1043 uac2->ac_intf = ret; 1044 uac2->ac_alt = 0; 1045 1046 if (EPOUT_EN(uac2_opts)) { 1047 ret = usb_interface_id(cfg, fn); 1048 if (ret < 0) { 1049 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1050 goto err_free_fu; 1051 } 1052 std_as_out_if0_desc.bInterfaceNumber = ret; 1053 std_as_out_if1_desc.bInterfaceNumber = ret; 1054 uac2->as_out_intf = ret; 1055 uac2->as_out_alt = 0; 1056 1057 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1058 fs_epout_desc.bmAttributes = 1059 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1060 hs_epout_desc.bmAttributes = 1061 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1062 ss_epout_desc.bmAttributes = 1063 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ASYNC; 1064 std_as_out_if1_desc.bNumEndpoints++; 1065 } else { 1066 fs_epout_desc.bmAttributes = 1067 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1068 hs_epout_desc.bmAttributes = 1069 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1070 ss_epout_desc.bmAttributes = 1071 USB_ENDPOINT_XFER_ISOC | USB_ENDPOINT_SYNC_ADAPTIVE; 1072 } 1073 } 1074 1075 if (EPIN_EN(uac2_opts)) { 1076 ret = usb_interface_id(cfg, fn); 1077 if (ret < 0) { 1078 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1079 goto err_free_fu; 1080 } 1081 std_as_in_if0_desc.bInterfaceNumber = ret; 1082 std_as_in_if1_desc.bInterfaceNumber = ret; 1083 uac2->as_in_intf = ret; 1084 uac2->as_in_alt = 0; 1085 } 1086 1087 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) { 1088 uac2->int_ep = usb_ep_autoconfig(gadget, &fs_ep_int_desc); 1089 if (!uac2->int_ep) { 1090 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1091 ret = -ENODEV; 1092 goto err_free_fu; 1093 } 1094 1095 std_ac_if_desc.bNumEndpoints = 1; 1096 } 1097 1098 /* Calculate wMaxPacketSize according to audio bandwidth */ 1099 ret = set_ep_max_packet_size(uac2_opts, &fs_epin_desc, USB_SPEED_FULL, 1100 true); 1101 if (ret < 0) { 1102 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1103 return ret; 1104 } 1105 1106 ret = set_ep_max_packet_size(uac2_opts, &fs_epout_desc, USB_SPEED_FULL, 1107 false); 1108 if (ret < 0) { 1109 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1110 return ret; 1111 } 1112 1113 ret = set_ep_max_packet_size(uac2_opts, &hs_epin_desc, USB_SPEED_HIGH, 1114 true); 1115 if (ret < 0) { 1116 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1117 return ret; 1118 } 1119 1120 ret = set_ep_max_packet_size(uac2_opts, &hs_epout_desc, USB_SPEED_HIGH, 1121 false); 1122 if (ret < 0) { 1123 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1124 return ret; 1125 } 1126 1127 ret = set_ep_max_packet_size(uac2_opts, &ss_epin_desc, USB_SPEED_SUPER, 1128 true); 1129 if (ret < 0) { 1130 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1131 return ret; 1132 } 1133 1134 ret = set_ep_max_packet_size(uac2_opts, &ss_epout_desc, USB_SPEED_SUPER, 1135 false); 1136 if (ret < 0) { 1137 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1138 return ret; 1139 } 1140 1141 if (EPOUT_EN(uac2_opts)) { 1142 agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc); 1143 if (!agdev->out_ep) { 1144 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1145 ret = -ENODEV; 1146 goto err_free_fu; 1147 } 1148 if (EPOUT_FBACK_IN_EN(uac2_opts)) { 1149 agdev->in_ep_fback = usb_ep_autoconfig(gadget, 1150 &fs_epin_fback_desc); 1151 if (!agdev->in_ep_fback) { 1152 dev_err(dev, "%s:%d Error!\n", 1153 __func__, __LINE__); 1154 ret = -ENODEV; 1155 goto err_free_fu; 1156 } 1157 } 1158 } 1159 1160 if (EPIN_EN(uac2_opts)) { 1161 agdev->in_ep = usb_ep_autoconfig(gadget, &fs_epin_desc); 1162 if (!agdev->in_ep) { 1163 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1164 ret = -ENODEV; 1165 goto err_free_fu; 1166 } 1167 } 1168 1169 agdev->in_ep_maxpsize = max_t(u16, 1170 le16_to_cpu(fs_epin_desc.wMaxPacketSize), 1171 le16_to_cpu(hs_epin_desc.wMaxPacketSize)); 1172 agdev->out_ep_maxpsize = max_t(u16, 1173 le16_to_cpu(fs_epout_desc.wMaxPacketSize), 1174 le16_to_cpu(hs_epout_desc.wMaxPacketSize)); 1175 1176 agdev->in_ep_maxpsize = max_t(u16, agdev->in_ep_maxpsize, 1177 le16_to_cpu(ss_epin_desc.wMaxPacketSize)); 1178 agdev->out_ep_maxpsize = max_t(u16, agdev->out_ep_maxpsize, 1179 le16_to_cpu(ss_epout_desc.wMaxPacketSize)); 1180 1181 ss_epin_desc_comp.wBytesPerInterval = ss_epin_desc.wMaxPacketSize; 1182 ss_epout_desc_comp.wBytesPerInterval = ss_epout_desc.wMaxPacketSize; 1183 1184 // HS and SS endpoint addresses are copied from autoconfigured FS descriptors 1185 hs_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1186 hs_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1187 hs_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1188 hs_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1189 ss_epout_desc.bEndpointAddress = fs_epout_desc.bEndpointAddress; 1190 ss_epin_fback_desc.bEndpointAddress = fs_epin_fback_desc.bEndpointAddress; 1191 ss_epin_desc.bEndpointAddress = fs_epin_desc.bEndpointAddress; 1192 ss_ep_int_desc.bEndpointAddress = fs_ep_int_desc.bEndpointAddress; 1193 1194 setup_descriptor(uac2_opts); 1195 1196 ret = usb_assign_descriptors(fn, fs_audio_desc, hs_audio_desc, ss_audio_desc, 1197 ss_audio_desc); 1198 if (ret) 1199 goto err_free_fu; 1200 1201 agdev->gadget = gadget; 1202 1203 agdev->params.p_chmask = uac2_opts->p_chmask; 1204 agdev->params.p_srate = uac2_opts->p_srate; 1205 agdev->params.p_ssize = uac2_opts->p_ssize; 1206 if (FUIN_EN(uac2_opts)) { 1207 agdev->params.p_fu.id = USB_IN_FU_ID; 1208 agdev->params.p_fu.mute_present = uac2_opts->p_mute_present; 1209 agdev->params.p_fu.volume_present = uac2_opts->p_volume_present; 1210 agdev->params.p_fu.volume_min = uac2_opts->p_volume_min; 1211 agdev->params.p_fu.volume_max = uac2_opts->p_volume_max; 1212 agdev->params.p_fu.volume_res = uac2_opts->p_volume_res; 1213 } 1214 agdev->params.c_chmask = uac2_opts->c_chmask; 1215 agdev->params.c_srate = uac2_opts->c_srate; 1216 agdev->params.c_ssize = uac2_opts->c_ssize; 1217 if (FUOUT_EN(uac2_opts)) { 1218 agdev->params.c_fu.id = USB_OUT_FU_ID; 1219 agdev->params.c_fu.mute_present = uac2_opts->c_mute_present; 1220 agdev->params.c_fu.volume_present = uac2_opts->c_volume_present; 1221 agdev->params.c_fu.volume_min = uac2_opts->c_volume_min; 1222 agdev->params.c_fu.volume_max = uac2_opts->c_volume_max; 1223 agdev->params.c_fu.volume_res = uac2_opts->c_volume_res; 1224 } 1225 agdev->params.req_number = uac2_opts->req_number; 1226 agdev->params.fb_max = uac2_opts->fb_max; 1227 1228 if (FUOUT_EN(uac2_opts) || FUIN_EN(uac2_opts)) 1229 agdev->notify = afunc_notify; 1230 1231 ret = g_audio_setup(agdev, "UAC2 PCM", "UAC2_Gadget"); 1232 if (ret) 1233 goto err_free_descs; 1234 1235 return 0; 1236 1237 err_free_descs: 1238 usb_free_all_descriptors(fn); 1239 agdev->gadget = NULL; 1240 err_free_fu: 1241 kfree(out_feature_unit_desc); 1242 out_feature_unit_desc = NULL; 1243 kfree(in_feature_unit_desc); 1244 in_feature_unit_desc = NULL; 1245 return ret; 1246 } 1247 1248 static void 1249 afunc_notify_complete(struct usb_ep *_ep, struct usb_request *req) 1250 { 1251 struct g_audio *agdev = req->context; 1252 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1253 1254 atomic_dec(&uac2->int_count); 1255 kfree(req->buf); 1256 usb_ep_free_request(_ep, req); 1257 } 1258 1259 static int 1260 afunc_notify(struct g_audio *agdev, int unit_id, int cs) 1261 { 1262 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1263 struct usb_request *req; 1264 struct uac2_interrupt_data_msg *msg; 1265 u16 w_index, w_value; 1266 int ret; 1267 1268 if (!uac2->int_ep->enabled) 1269 return 0; 1270 1271 if (atomic_inc_return(&uac2->int_count) > UAC2_DEF_INT_REQ_NUM) { 1272 atomic_dec(&uac2->int_count); 1273 return 0; 1274 } 1275 1276 req = usb_ep_alloc_request(uac2->int_ep, GFP_ATOMIC); 1277 if (req == NULL) { 1278 ret = -ENOMEM; 1279 goto err_dec_int_count; 1280 } 1281 1282 msg = kzalloc(sizeof(*msg), GFP_ATOMIC); 1283 if (msg == NULL) { 1284 ret = -ENOMEM; 1285 goto err_free_request; 1286 } 1287 1288 w_index = unit_id << 8 | uac2->ac_intf; 1289 w_value = cs << 8; 1290 1291 msg->bInfo = 0; /* Non-vendor, interface interrupt */ 1292 msg->bAttribute = UAC2_CS_CUR; 1293 msg->wIndex = cpu_to_le16(w_index); 1294 msg->wValue = cpu_to_le16(w_value); 1295 1296 req->length = sizeof(*msg); 1297 req->buf = msg; 1298 req->context = agdev; 1299 req->complete = afunc_notify_complete; 1300 1301 ret = usb_ep_queue(uac2->int_ep, req, GFP_ATOMIC); 1302 1303 if (ret) 1304 goto err_free_msg; 1305 1306 return 0; 1307 1308 err_free_msg: 1309 kfree(msg); 1310 err_free_request: 1311 usb_ep_free_request(uac2->int_ep, req); 1312 err_dec_int_count: 1313 atomic_dec(&uac2->int_count); 1314 1315 return ret; 1316 } 1317 1318 static int 1319 afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt) 1320 { 1321 struct usb_composite_dev *cdev = fn->config->cdev; 1322 struct f_uac2 *uac2 = func_to_uac2(fn); 1323 struct g_audio *agdev = func_to_g_audio(fn); 1324 struct usb_gadget *gadget = cdev->gadget; 1325 struct device *dev = &gadget->dev; 1326 int ret = 0; 1327 1328 /* No i/f has more than 2 alt settings */ 1329 if (alt > 1) { 1330 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1331 return -EINVAL; 1332 } 1333 1334 if (intf == uac2->ac_intf) { 1335 /* Control I/f has only 1 AltSetting - 0 */ 1336 if (alt) { 1337 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1338 return -EINVAL; 1339 } 1340 1341 /* restart interrupt endpoint */ 1342 if (uac2->int_ep) { 1343 usb_ep_disable(uac2->int_ep); 1344 config_ep_by_speed(gadget, &agdev->func, uac2->int_ep); 1345 usb_ep_enable(uac2->int_ep); 1346 } 1347 1348 return 0; 1349 } 1350 1351 if (intf == uac2->as_out_intf) { 1352 uac2->as_out_alt = alt; 1353 1354 if (alt) 1355 ret = u_audio_start_capture(&uac2->g_audio); 1356 else 1357 u_audio_stop_capture(&uac2->g_audio); 1358 } else if (intf == uac2->as_in_intf) { 1359 uac2->as_in_alt = alt; 1360 1361 if (alt) 1362 ret = u_audio_start_playback(&uac2->g_audio); 1363 else 1364 u_audio_stop_playback(&uac2->g_audio); 1365 } else { 1366 dev_err(dev, "%s:%d Error!\n", __func__, __LINE__); 1367 return -EINVAL; 1368 } 1369 1370 return ret; 1371 } 1372 1373 static int 1374 afunc_get_alt(struct usb_function *fn, unsigned intf) 1375 { 1376 struct f_uac2 *uac2 = func_to_uac2(fn); 1377 struct g_audio *agdev = func_to_g_audio(fn); 1378 1379 if (intf == uac2->ac_intf) 1380 return uac2->ac_alt; 1381 else if (intf == uac2->as_out_intf) 1382 return uac2->as_out_alt; 1383 else if (intf == uac2->as_in_intf) 1384 return uac2->as_in_alt; 1385 else 1386 dev_err(&agdev->gadget->dev, 1387 "%s:%d Invalid Interface %d!\n", 1388 __func__, __LINE__, intf); 1389 1390 return -EINVAL; 1391 } 1392 1393 static void 1394 afunc_disable(struct usb_function *fn) 1395 { 1396 struct f_uac2 *uac2 = func_to_uac2(fn); 1397 1398 uac2->as_in_alt = 0; 1399 uac2->as_out_alt = 0; 1400 u_audio_stop_capture(&uac2->g_audio); 1401 u_audio_stop_playback(&uac2->g_audio); 1402 if (uac2->int_ep) 1403 usb_ep_disable(uac2->int_ep); 1404 } 1405 1406 static int 1407 in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1408 { 1409 struct usb_request *req = fn->config->cdev->req; 1410 struct g_audio *agdev = func_to_g_audio(fn); 1411 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1412 u16 w_length = le16_to_cpu(cr->wLength); 1413 u16 w_index = le16_to_cpu(cr->wIndex); 1414 u16 w_value = le16_to_cpu(cr->wValue); 1415 u8 entity_id = (w_index >> 8) & 0xff; 1416 u8 control_selector = w_value >> 8; 1417 int value = -EOPNOTSUPP; 1418 int p_srate, c_srate; 1419 1420 p_srate = opts->p_srate; 1421 c_srate = opts->c_srate; 1422 1423 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1424 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1425 struct cntrl_cur_lay3 c; 1426 1427 memset(&c, 0, sizeof(struct cntrl_cur_lay3)); 1428 1429 if (entity_id == USB_IN_CLK_ID) 1430 c.dCUR = cpu_to_le32(p_srate); 1431 else if (entity_id == USB_OUT_CLK_ID) 1432 c.dCUR = cpu_to_le32(c_srate); 1433 1434 value = min_t(unsigned int, w_length, sizeof(c)); 1435 memcpy(req->buf, &c, value); 1436 } else if (control_selector == UAC2_CS_CONTROL_CLOCK_VALID) { 1437 *(u8 *)req->buf = 1; 1438 value = min_t(unsigned int, w_length, 1); 1439 } else { 1440 dev_err(&agdev->gadget->dev, 1441 "%s:%d control_selector=%d TODO!\n", 1442 __func__, __LINE__, control_selector); 1443 } 1444 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1445 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1446 unsigned int is_playback = 0; 1447 1448 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1449 is_playback = 1; 1450 1451 if (control_selector == UAC_FU_MUTE) { 1452 unsigned int mute; 1453 1454 u_audio_get_mute(agdev, is_playback, &mute); 1455 1456 *(u8 *)req->buf = mute; 1457 value = min_t(unsigned int, w_length, 1); 1458 } else if (control_selector == UAC_FU_VOLUME) { 1459 struct cntrl_cur_lay2 c; 1460 s16 volume; 1461 1462 memset(&c, 0, sizeof(struct cntrl_cur_lay2)); 1463 1464 u_audio_get_volume(agdev, is_playback, &volume); 1465 c.wCUR = cpu_to_le16(volume); 1466 1467 value = min_t(unsigned int, w_length, sizeof(c)); 1468 memcpy(req->buf, &c, value); 1469 } else { 1470 dev_err(&agdev->gadget->dev, 1471 "%s:%d control_selector=%d TODO!\n", 1472 __func__, __LINE__, control_selector); 1473 } 1474 } else { 1475 dev_err(&agdev->gadget->dev, 1476 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1477 __func__, __LINE__, entity_id, control_selector); 1478 } 1479 1480 return value; 1481 } 1482 1483 static int 1484 in_rq_range(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1485 { 1486 struct usb_request *req = fn->config->cdev->req; 1487 struct g_audio *agdev = func_to_g_audio(fn); 1488 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1489 u16 w_length = le16_to_cpu(cr->wLength); 1490 u16 w_index = le16_to_cpu(cr->wIndex); 1491 u16 w_value = le16_to_cpu(cr->wValue); 1492 u8 entity_id = (w_index >> 8) & 0xff; 1493 u8 control_selector = w_value >> 8; 1494 int value = -EOPNOTSUPP; 1495 int p_srate, c_srate; 1496 1497 p_srate = opts->p_srate; 1498 c_srate = opts->c_srate; 1499 1500 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1501 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) { 1502 struct cntrl_range_lay3 r; 1503 1504 if (entity_id == USB_IN_CLK_ID) 1505 r.dMIN = cpu_to_le32(p_srate); 1506 else if (entity_id == USB_OUT_CLK_ID) 1507 r.dMIN = cpu_to_le32(c_srate); 1508 else 1509 return -EOPNOTSUPP; 1510 1511 r.dMAX = r.dMIN; 1512 r.dRES = 0; 1513 r.wNumSubRanges = cpu_to_le16(1); 1514 1515 value = min_t(unsigned int, w_length, sizeof(r)); 1516 memcpy(req->buf, &r, value); 1517 } else { 1518 dev_err(&agdev->gadget->dev, 1519 "%s:%d control_selector=%d TODO!\n", 1520 __func__, __LINE__, control_selector); 1521 } 1522 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1523 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1524 unsigned int is_playback = 0; 1525 1526 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1527 is_playback = 1; 1528 1529 if (control_selector == UAC_FU_VOLUME) { 1530 struct cntrl_range_lay2 r; 1531 s16 max_db, min_db, res_db; 1532 1533 if (is_playback) { 1534 max_db = opts->p_volume_max; 1535 min_db = opts->p_volume_min; 1536 res_db = opts->p_volume_res; 1537 } else { 1538 max_db = opts->c_volume_max; 1539 min_db = opts->c_volume_min; 1540 res_db = opts->c_volume_res; 1541 } 1542 1543 r.wMAX = cpu_to_le16(max_db); 1544 r.wMIN = cpu_to_le16(min_db); 1545 r.wRES = cpu_to_le16(res_db); 1546 r.wNumSubRanges = cpu_to_le16(1); 1547 1548 value = min_t(unsigned int, w_length, sizeof(r)); 1549 memcpy(req->buf, &r, value); 1550 } else { 1551 dev_err(&agdev->gadget->dev, 1552 "%s:%d control_selector=%d TODO!\n", 1553 __func__, __LINE__, control_selector); 1554 } 1555 } else { 1556 dev_err(&agdev->gadget->dev, 1557 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1558 __func__, __LINE__, entity_id, control_selector); 1559 } 1560 1561 return value; 1562 } 1563 1564 static int 1565 ac_rq_in(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1566 { 1567 if (cr->bRequest == UAC2_CS_CUR) 1568 return in_rq_cur(fn, cr); 1569 else if (cr->bRequest == UAC2_CS_RANGE) 1570 return in_rq_range(fn, cr); 1571 else 1572 return -EOPNOTSUPP; 1573 } 1574 1575 static void 1576 out_rq_cur_complete(struct usb_ep *ep, struct usb_request *req) 1577 { 1578 struct g_audio *agdev = req->context; 1579 struct usb_composite_dev *cdev = agdev->func.config->cdev; 1580 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1581 struct f_uac2 *uac2 = func_to_uac2(&agdev->func); 1582 struct usb_ctrlrequest *cr = &uac2->setup_cr; 1583 u16 w_index = le16_to_cpu(cr->wIndex); 1584 u16 w_value = le16_to_cpu(cr->wValue); 1585 u8 entity_id = (w_index >> 8) & 0xff; 1586 u8 control_selector = w_value >> 8; 1587 1588 if (req->status != 0) { 1589 dev_dbg(&cdev->gadget->dev, "completion err %d\n", req->status); 1590 return; 1591 } 1592 1593 if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1594 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1595 unsigned int is_playback = 0; 1596 1597 if (FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) 1598 is_playback = 1; 1599 1600 if (control_selector == UAC_FU_MUTE) { 1601 u8 mute = *(u8 *)req->buf; 1602 1603 u_audio_set_mute(agdev, is_playback, mute); 1604 1605 return; 1606 } else if (control_selector == UAC_FU_VOLUME) { 1607 struct cntrl_cur_lay2 *c = req->buf; 1608 s16 volume; 1609 1610 volume = le16_to_cpu(c->wCUR); 1611 u_audio_set_volume(agdev, is_playback, volume); 1612 1613 return; 1614 } else { 1615 dev_err(&agdev->gadget->dev, 1616 "%s:%d control_selector=%d TODO!\n", 1617 __func__, __LINE__, control_selector); 1618 usb_ep_set_halt(ep); 1619 } 1620 } 1621 } 1622 1623 static int 1624 out_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1625 { 1626 struct usb_request *req = fn->config->cdev->req; 1627 struct g_audio *agdev = func_to_g_audio(fn); 1628 struct f_uac2_opts *opts = g_audio_to_uac2_opts(agdev); 1629 struct f_uac2 *uac2 = func_to_uac2(fn); 1630 u16 w_length = le16_to_cpu(cr->wLength); 1631 u16 w_index = le16_to_cpu(cr->wIndex); 1632 u16 w_value = le16_to_cpu(cr->wValue); 1633 u8 entity_id = (w_index >> 8) & 0xff; 1634 u8 control_selector = w_value >> 8; 1635 1636 if ((entity_id == USB_IN_CLK_ID) || (entity_id == USB_OUT_CLK_ID)) { 1637 if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) 1638 return w_length; 1639 } else if ((FUIN_EN(opts) && (entity_id == USB_IN_FU_ID)) || 1640 (FUOUT_EN(opts) && (entity_id == USB_OUT_FU_ID))) { 1641 memcpy(&uac2->setup_cr, cr, sizeof(*cr)); 1642 req->context = agdev; 1643 req->complete = out_rq_cur_complete; 1644 1645 return w_length; 1646 } else { 1647 dev_err(&agdev->gadget->dev, 1648 "%s:%d entity_id=%d control_selector=%d TODO!\n", 1649 __func__, __LINE__, entity_id, control_selector); 1650 } 1651 return -EOPNOTSUPP; 1652 } 1653 1654 static int 1655 setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1656 { 1657 struct f_uac2 *uac2 = func_to_uac2(fn); 1658 struct g_audio *agdev = func_to_g_audio(fn); 1659 u16 w_index = le16_to_cpu(cr->wIndex); 1660 u8 intf = w_index & 0xff; 1661 1662 if (intf != uac2->ac_intf) { 1663 dev_err(&agdev->gadget->dev, 1664 "%s:%d Error!\n", __func__, __LINE__); 1665 return -EOPNOTSUPP; 1666 } 1667 1668 if (cr->bRequestType & USB_DIR_IN) 1669 return ac_rq_in(fn, cr); 1670 else if (cr->bRequest == UAC2_CS_CUR) 1671 return out_rq_cur(fn, cr); 1672 1673 return -EOPNOTSUPP; 1674 } 1675 1676 static int 1677 afunc_setup(struct usb_function *fn, const struct usb_ctrlrequest *cr) 1678 { 1679 struct usb_composite_dev *cdev = fn->config->cdev; 1680 struct g_audio *agdev = func_to_g_audio(fn); 1681 struct usb_request *req = cdev->req; 1682 u16 w_length = le16_to_cpu(cr->wLength); 1683 int value = -EOPNOTSUPP; 1684 1685 /* Only Class specific requests are supposed to reach here */ 1686 if ((cr->bRequestType & USB_TYPE_MASK) != USB_TYPE_CLASS) 1687 return -EOPNOTSUPP; 1688 1689 if ((cr->bRequestType & USB_RECIP_MASK) == USB_RECIP_INTERFACE) 1690 value = setup_rq_inf(fn, cr); 1691 else 1692 dev_err(&agdev->gadget->dev, "%s:%d Error!\n", 1693 __func__, __LINE__); 1694 1695 if (value >= 0) { 1696 req->length = value; 1697 req->zero = value < w_length; 1698 value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); 1699 if (value < 0) { 1700 dev_err(&agdev->gadget->dev, 1701 "%s:%d Error!\n", __func__, __LINE__); 1702 req->status = 0; 1703 } 1704 } 1705 1706 return value; 1707 } 1708 1709 static inline struct f_uac2_opts *to_f_uac2_opts(struct config_item *item) 1710 { 1711 return container_of(to_config_group(item), struct f_uac2_opts, 1712 func_inst.group); 1713 } 1714 1715 static void f_uac2_attr_release(struct config_item *item) 1716 { 1717 struct f_uac2_opts *opts = to_f_uac2_opts(item); 1718 1719 usb_put_function_instance(&opts->func_inst); 1720 } 1721 1722 static struct configfs_item_operations f_uac2_item_ops = { 1723 .release = f_uac2_attr_release, 1724 }; 1725 1726 #define uac2_kstrtou32 kstrtou32 1727 #define uac2_kstrtos16 kstrtos16 1728 #define uac2_kstrtobool(s, base, res) kstrtobool((s), (res)) 1729 1730 static const char *u32_fmt = "%u\n"; 1731 static const char *s16_fmt = "%hd\n"; 1732 static const char *bool_fmt = "%u\n"; 1733 1734 #define UAC2_ATTRIBUTE(type, name) \ 1735 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1736 char *page) \ 1737 { \ 1738 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1739 int result; \ 1740 \ 1741 mutex_lock(&opts->lock); \ 1742 result = sprintf(page, type##_fmt, opts->name); \ 1743 mutex_unlock(&opts->lock); \ 1744 \ 1745 return result; \ 1746 } \ 1747 \ 1748 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1749 const char *page, size_t len) \ 1750 { \ 1751 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1752 int ret; \ 1753 type num; \ 1754 \ 1755 mutex_lock(&opts->lock); \ 1756 if (opts->refcnt) { \ 1757 ret = -EBUSY; \ 1758 goto end; \ 1759 } \ 1760 \ 1761 ret = uac2_kstrto##type(page, 0, &num); \ 1762 if (ret) \ 1763 goto end; \ 1764 \ 1765 opts->name = num; \ 1766 ret = len; \ 1767 \ 1768 end: \ 1769 mutex_unlock(&opts->lock); \ 1770 return ret; \ 1771 } \ 1772 \ 1773 CONFIGFS_ATTR(f_uac2_opts_, name) 1774 1775 #define UAC2_ATTRIBUTE_SYNC(name) \ 1776 static ssize_t f_uac2_opts_##name##_show(struct config_item *item, \ 1777 char *page) \ 1778 { \ 1779 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1780 int result; \ 1781 char *str; \ 1782 \ 1783 mutex_lock(&opts->lock); \ 1784 switch (opts->name) { \ 1785 case USB_ENDPOINT_SYNC_ASYNC: \ 1786 str = "async"; \ 1787 break; \ 1788 case USB_ENDPOINT_SYNC_ADAPTIVE: \ 1789 str = "adaptive"; \ 1790 break; \ 1791 default: \ 1792 str = "unknown"; \ 1793 break; \ 1794 } \ 1795 result = sprintf(page, "%s\n", str); \ 1796 mutex_unlock(&opts->lock); \ 1797 \ 1798 return result; \ 1799 } \ 1800 \ 1801 static ssize_t f_uac2_opts_##name##_store(struct config_item *item, \ 1802 const char *page, size_t len) \ 1803 { \ 1804 struct f_uac2_opts *opts = to_f_uac2_opts(item); \ 1805 int ret = 0; \ 1806 \ 1807 mutex_lock(&opts->lock); \ 1808 if (opts->refcnt) { \ 1809 ret = -EBUSY; \ 1810 goto end; \ 1811 } \ 1812 \ 1813 if (!strncmp(page, "async", 5)) \ 1814 opts->name = USB_ENDPOINT_SYNC_ASYNC; \ 1815 else if (!strncmp(page, "adaptive", 8)) \ 1816 opts->name = USB_ENDPOINT_SYNC_ADAPTIVE; \ 1817 else { \ 1818 ret = -EINVAL; \ 1819 goto end; \ 1820 } \ 1821 \ 1822 ret = len; \ 1823 \ 1824 end: \ 1825 mutex_unlock(&opts->lock); \ 1826 return ret; \ 1827 } \ 1828 \ 1829 CONFIGFS_ATTR(f_uac2_opts_, name) 1830 1831 UAC2_ATTRIBUTE(u32, p_chmask); 1832 UAC2_ATTRIBUTE(u32, p_srate); 1833 UAC2_ATTRIBUTE(u32, p_ssize); 1834 UAC2_ATTRIBUTE(u32, c_chmask); 1835 UAC2_ATTRIBUTE(u32, c_srate); 1836 UAC2_ATTRIBUTE_SYNC(c_sync); 1837 UAC2_ATTRIBUTE(u32, c_ssize); 1838 UAC2_ATTRIBUTE(u32, req_number); 1839 1840 UAC2_ATTRIBUTE(bool, p_mute_present); 1841 UAC2_ATTRIBUTE(bool, p_volume_present); 1842 UAC2_ATTRIBUTE(s16, p_volume_min); 1843 UAC2_ATTRIBUTE(s16, p_volume_max); 1844 UAC2_ATTRIBUTE(s16, p_volume_res); 1845 1846 UAC2_ATTRIBUTE(bool, c_mute_present); 1847 UAC2_ATTRIBUTE(bool, c_volume_present); 1848 UAC2_ATTRIBUTE(s16, c_volume_min); 1849 UAC2_ATTRIBUTE(s16, c_volume_max); 1850 UAC2_ATTRIBUTE(s16, c_volume_res); 1851 UAC2_ATTRIBUTE(u32, fb_max); 1852 1853 static struct configfs_attribute *f_uac2_attrs[] = { 1854 &f_uac2_opts_attr_p_chmask, 1855 &f_uac2_opts_attr_p_srate, 1856 &f_uac2_opts_attr_p_ssize, 1857 &f_uac2_opts_attr_c_chmask, 1858 &f_uac2_opts_attr_c_srate, 1859 &f_uac2_opts_attr_c_ssize, 1860 &f_uac2_opts_attr_c_sync, 1861 &f_uac2_opts_attr_req_number, 1862 &f_uac2_opts_attr_fb_max, 1863 1864 &f_uac2_opts_attr_p_mute_present, 1865 &f_uac2_opts_attr_p_volume_present, 1866 &f_uac2_opts_attr_p_volume_min, 1867 &f_uac2_opts_attr_p_volume_max, 1868 &f_uac2_opts_attr_p_volume_res, 1869 1870 &f_uac2_opts_attr_c_mute_present, 1871 &f_uac2_opts_attr_c_volume_present, 1872 &f_uac2_opts_attr_c_volume_min, 1873 &f_uac2_opts_attr_c_volume_max, 1874 &f_uac2_opts_attr_c_volume_res, 1875 1876 NULL, 1877 }; 1878 1879 static const struct config_item_type f_uac2_func_type = { 1880 .ct_item_ops = &f_uac2_item_ops, 1881 .ct_attrs = f_uac2_attrs, 1882 .ct_owner = THIS_MODULE, 1883 }; 1884 1885 static void afunc_free_inst(struct usb_function_instance *f) 1886 { 1887 struct f_uac2_opts *opts; 1888 1889 opts = container_of(f, struct f_uac2_opts, func_inst); 1890 kfree(opts); 1891 } 1892 1893 static struct usb_function_instance *afunc_alloc_inst(void) 1894 { 1895 struct f_uac2_opts *opts; 1896 1897 opts = kzalloc(sizeof(*opts), GFP_KERNEL); 1898 if (!opts) 1899 return ERR_PTR(-ENOMEM); 1900 1901 mutex_init(&opts->lock); 1902 opts->func_inst.free_func_inst = afunc_free_inst; 1903 1904 config_group_init_type_name(&opts->func_inst.group, "", 1905 &f_uac2_func_type); 1906 1907 opts->p_chmask = UAC2_DEF_PCHMASK; 1908 opts->p_srate = UAC2_DEF_PSRATE; 1909 opts->p_ssize = UAC2_DEF_PSSIZE; 1910 opts->c_chmask = UAC2_DEF_CCHMASK; 1911 opts->c_srate = UAC2_DEF_CSRATE; 1912 opts->c_ssize = UAC2_DEF_CSSIZE; 1913 opts->c_sync = UAC2_DEF_CSYNC; 1914 1915 opts->p_mute_present = UAC2_DEF_MUTE_PRESENT; 1916 opts->p_volume_present = UAC2_DEF_VOLUME_PRESENT; 1917 opts->p_volume_min = UAC2_DEF_MIN_DB; 1918 opts->p_volume_max = UAC2_DEF_MAX_DB; 1919 opts->p_volume_res = UAC2_DEF_RES_DB; 1920 1921 opts->c_mute_present = UAC2_DEF_MUTE_PRESENT; 1922 opts->c_volume_present = UAC2_DEF_VOLUME_PRESENT; 1923 opts->c_volume_min = UAC2_DEF_MIN_DB; 1924 opts->c_volume_max = UAC2_DEF_MAX_DB; 1925 opts->c_volume_res = UAC2_DEF_RES_DB; 1926 1927 opts->req_number = UAC2_DEF_REQ_NUM; 1928 opts->fb_max = UAC2_DEF_FB_MAX; 1929 return &opts->func_inst; 1930 } 1931 1932 static void afunc_free(struct usb_function *f) 1933 { 1934 struct g_audio *agdev; 1935 struct f_uac2_opts *opts; 1936 1937 agdev = func_to_g_audio(f); 1938 opts = container_of(f->fi, struct f_uac2_opts, func_inst); 1939 kfree(agdev); 1940 mutex_lock(&opts->lock); 1941 --opts->refcnt; 1942 mutex_unlock(&opts->lock); 1943 } 1944 1945 static void afunc_unbind(struct usb_configuration *c, struct usb_function *f) 1946 { 1947 struct g_audio *agdev = func_to_g_audio(f); 1948 1949 g_audio_cleanup(agdev); 1950 usb_free_all_descriptors(f); 1951 1952 agdev->gadget = NULL; 1953 1954 kfree(out_feature_unit_desc); 1955 out_feature_unit_desc = NULL; 1956 kfree(in_feature_unit_desc); 1957 in_feature_unit_desc = NULL; 1958 } 1959 1960 static struct usb_function *afunc_alloc(struct usb_function_instance *fi) 1961 { 1962 struct f_uac2 *uac2; 1963 struct f_uac2_opts *opts; 1964 1965 uac2 = kzalloc(sizeof(*uac2), GFP_KERNEL); 1966 if (uac2 == NULL) 1967 return ERR_PTR(-ENOMEM); 1968 1969 opts = container_of(fi, struct f_uac2_opts, func_inst); 1970 mutex_lock(&opts->lock); 1971 ++opts->refcnt; 1972 mutex_unlock(&opts->lock); 1973 1974 uac2->g_audio.func.name = "uac2_func"; 1975 uac2->g_audio.func.bind = afunc_bind; 1976 uac2->g_audio.func.unbind = afunc_unbind; 1977 uac2->g_audio.func.set_alt = afunc_set_alt; 1978 uac2->g_audio.func.get_alt = afunc_get_alt; 1979 uac2->g_audio.func.disable = afunc_disable; 1980 uac2->g_audio.func.setup = afunc_setup; 1981 uac2->g_audio.func.free_func = afunc_free; 1982 1983 return &uac2->g_audio.func; 1984 } 1985 1986 DECLARE_USB_FUNCTION_INIT(uac2, afunc_alloc_inst, afunc_alloc); 1987 MODULE_LICENSE("GPL"); 1988 MODULE_AUTHOR("Yadwinder Singh"); 1989 MODULE_AUTHOR("Jaswinder Singh"); 1990 MODULE_AUTHOR("Ruslan Bilovol"); 1991