1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. 4 */ 5 6 #include <linux/auxiliary_bus.h> 7 #include <linux/ctype.h> 8 #include <linux/dma-mapping.h> 9 #include <linux/dma-map-ops.h> 10 #include <linux/init.h> 11 #include <linux/iommu.h> 12 #include <linux/module.h> 13 #include <linux/moduleparam.h> 14 #include <linux/soc/qcom/qmi.h> 15 #include <linux/usb.h> 16 #include <linux/usb/audio.h> 17 #include <linux/usb/audio-v2.h> 18 #include <linux/usb/audio-v3.h> 19 #include <linux/usb/hcd.h> 20 #include <linux/usb/quirks.h> 21 #include <linux/usb/xhci-sideband.h> 22 23 #include <sound/control.h> 24 #include <sound/core.h> 25 #include <sound/info.h> 26 #include <sound/initval.h> 27 #include <sound/pcm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/q6usboffload.h> 30 #include <sound/soc.h> 31 #include <sound/soc-usb.h> 32 33 #include "../usbaudio.h" 34 #include "../card.h" 35 #include "../endpoint.h" 36 #include "../format.h" 37 #include "../helper.h" 38 #include "../pcm.h" 39 #include "../power.h" 40 41 #include "mixer_usb_offload.h" 42 #include "usb_audio_qmi_v01.h" 43 44 /* Stream disable request timeout during USB device disconnect */ 45 #define DEV_RELEASE_WAIT_TIMEOUT 10000 /* in ms */ 46 47 /* Data interval calculation parameters */ 48 #define BUS_INTERVAL_FULL_SPEED 1000 /* in us */ 49 #define BUS_INTERVAL_HIGHSPEED_AND_ABOVE 125 /* in us */ 50 #define MAX_BINTERVAL_ISOC_EP 16 51 52 #define QMI_STREAM_REQ_CARD_NUM_MASK 0xffff0000 53 #define QMI_STREAM_REQ_DEV_NUM_MASK 0xff00 54 #define QMI_STREAM_REQ_DIRECTION 0xff 55 56 /* iommu resource parameters and management */ 57 #define PREPEND_SID_TO_IOVA(iova, sid) ((u64)(((u64)(iova)) | \ 58 (((u64)sid) << 32))) 59 #define IOVA_MASK(iova) (((u64)(iova)) & 0xFFFFFFFF) 60 #define IOVA_BASE 0x1000 61 #define IOVA_XFER_RING_BASE (IOVA_BASE + PAGE_SIZE * (SNDRV_CARDS + 1)) 62 #define IOVA_XFER_BUF_BASE (IOVA_XFER_RING_BASE + PAGE_SIZE * SNDRV_CARDS * 32) 63 #define IOVA_XFER_RING_MAX (IOVA_XFER_BUF_BASE - PAGE_SIZE) 64 #define IOVA_XFER_BUF_MAX (0xfffff000 - PAGE_SIZE) 65 66 #define MAX_XFER_BUFF_LEN (24 * PAGE_SIZE) 67 68 struct iova_info { 69 struct list_head list; 70 unsigned long start_iova; 71 size_t size; 72 bool in_use; 73 }; 74 75 struct intf_info { 76 /* IOMMU ring/buffer mapping information */ 77 unsigned long data_xfer_ring_va; 78 size_t data_xfer_ring_size; 79 unsigned long sync_xfer_ring_va; 80 size_t sync_xfer_ring_size; 81 dma_addr_t xfer_buf_iova; 82 size_t xfer_buf_size; 83 dma_addr_t xfer_buf_dma; 84 u8 *xfer_buf_cpu; 85 86 /* USB endpoint information */ 87 unsigned int data_ep_pipe; 88 unsigned int sync_ep_pipe; 89 unsigned int data_ep_idx; 90 unsigned int sync_ep_idx; 91 92 u8 intf_num; 93 u8 pcm_card_num; 94 u8 pcm_dev_num; 95 u8 direction; 96 bool in_use; 97 }; 98 99 struct uaudio_qmi_dev { 100 struct device *dev; 101 struct q6usb_offload *data; 102 struct auxiliary_device *auxdev; 103 104 /* list to keep track of available iova */ 105 struct list_head xfer_ring_list; 106 size_t xfer_ring_iova_size; 107 unsigned long curr_xfer_ring_iova; 108 struct list_head xfer_buf_list; 109 size_t xfer_buf_iova_size; 110 unsigned long curr_xfer_buf_iova; 111 112 /* bit fields representing pcm card enabled */ 113 unsigned long card_slot; 114 /* indicate event ring mapped or not */ 115 bool er_mapped; 116 }; 117 118 struct uaudio_dev { 119 struct usb_device *udev; 120 /* audio control interface */ 121 struct usb_host_interface *ctrl_intf; 122 unsigned int usb_core_id; 123 atomic_t in_use; 124 struct kref kref; 125 wait_queue_head_t disconnect_wq; 126 127 /* interface specific */ 128 int num_intf; 129 struct intf_info *info; 130 struct snd_usb_audio *chip; 131 132 /* xhci sideband */ 133 struct xhci_sideband *sb; 134 135 /* SoC USB device */ 136 struct snd_soc_usb_device *sdev; 137 }; 138 139 static struct uaudio_dev uadev[SNDRV_CARDS]; 140 static struct uaudio_qmi_dev *uaudio_qdev; 141 static struct uaudio_qmi_svc *uaudio_svc; 142 static DEFINE_MUTEX(qdev_mutex); 143 144 struct uaudio_qmi_svc { 145 struct qmi_handle *uaudio_svc_hdl; 146 struct sockaddr_qrtr client_sq; 147 bool client_connected; 148 }; 149 150 enum mem_type { 151 MEM_EVENT_RING, 152 MEM_XFER_RING, 153 MEM_XFER_BUF, 154 }; 155 156 /* Supported audio formats */ 157 enum usb_qmi_audio_format { 158 USB_QMI_PCM_FORMAT_S8 = 0, 159 USB_QMI_PCM_FORMAT_U8, 160 USB_QMI_PCM_FORMAT_S16_LE, 161 USB_QMI_PCM_FORMAT_S16_BE, 162 USB_QMI_PCM_FORMAT_U16_LE, 163 USB_QMI_PCM_FORMAT_U16_BE, 164 USB_QMI_PCM_FORMAT_S24_LE, 165 USB_QMI_PCM_FORMAT_S24_BE, 166 USB_QMI_PCM_FORMAT_U24_LE, 167 USB_QMI_PCM_FORMAT_U24_BE, 168 USB_QMI_PCM_FORMAT_S24_3LE, 169 USB_QMI_PCM_FORMAT_S24_3BE, 170 USB_QMI_PCM_FORMAT_U24_3LE, 171 USB_QMI_PCM_FORMAT_U24_3BE, 172 USB_QMI_PCM_FORMAT_S32_LE, 173 USB_QMI_PCM_FORMAT_S32_BE, 174 USB_QMI_PCM_FORMAT_U32_LE, 175 USB_QMI_PCM_FORMAT_U32_BE, 176 }; 177 178 static int usb_qmi_get_pcm_num(struct snd_usb_audio *chip, int direction) 179 { 180 struct snd_usb_substream *subs = NULL; 181 struct snd_usb_stream *as; 182 int count = 0; 183 184 list_for_each_entry(as, &chip->pcm_list, list) { 185 subs = &as->substream[direction]; 186 if (subs->ep_num) 187 count++; 188 } 189 190 return count; 191 } 192 193 static enum usb_qmi_audio_device_speed_enum_v01 194 get_speed_info(enum usb_device_speed udev_speed) 195 { 196 switch (udev_speed) { 197 case USB_SPEED_LOW: 198 return USB_QMI_DEVICE_SPEED_LOW_V01; 199 case USB_SPEED_FULL: 200 return USB_QMI_DEVICE_SPEED_FULL_V01; 201 case USB_SPEED_HIGH: 202 return USB_QMI_DEVICE_SPEED_HIGH_V01; 203 case USB_SPEED_SUPER: 204 return USB_QMI_DEVICE_SPEED_SUPER_V01; 205 case USB_SPEED_SUPER_PLUS: 206 return USB_QMI_DEVICE_SPEED_SUPER_PLUS_V01; 207 default: 208 return USB_QMI_DEVICE_SPEED_INVALID_V01; 209 } 210 } 211 212 static struct snd_usb_substream *find_substream(unsigned int card_num, 213 unsigned int pcm_idx, 214 unsigned int direction) 215 { 216 struct snd_usb_substream *subs = NULL; 217 struct snd_usb_audio *chip; 218 struct snd_usb_stream *as; 219 220 chip = uadev[card_num].chip; 221 if (!chip || atomic_read(&chip->shutdown)) 222 goto done; 223 224 if (pcm_idx >= chip->pcm_devs) 225 goto done; 226 227 if (direction > SNDRV_PCM_STREAM_CAPTURE) 228 goto done; 229 230 list_for_each_entry(as, &chip->pcm_list, list) { 231 if (as->pcm_index == pcm_idx) { 232 subs = &as->substream[direction]; 233 goto done; 234 } 235 } 236 237 done: 238 return subs; 239 } 240 241 static int info_idx_from_ifnum(int card_num, int intf_num, bool enable) 242 { 243 int i; 244 245 /* 246 * default index 0 is used when info is allocated upon 247 * first enable audio stream req for a pcm device 248 */ 249 if (enable && !uadev[card_num].info) 250 return 0; 251 252 for (i = 0; i < uadev[card_num].num_intf; i++) { 253 if (enable && !uadev[card_num].info[i].in_use) 254 return i; 255 else if (!enable && 256 uadev[card_num].info[i].intf_num == intf_num) 257 return i; 258 } 259 260 return -EINVAL; 261 } 262 263 static int get_data_interval_from_si(struct snd_usb_substream *subs, 264 u32 service_interval) 265 { 266 unsigned int bus_intval_mult; 267 unsigned int bus_intval; 268 unsigned int binterval; 269 270 if (subs->dev->speed >= USB_SPEED_HIGH) 271 bus_intval = BUS_INTERVAL_HIGHSPEED_AND_ABOVE; 272 else 273 bus_intval = BUS_INTERVAL_FULL_SPEED; 274 275 if (service_interval % bus_intval) 276 return -EINVAL; 277 278 bus_intval_mult = service_interval / bus_intval; 279 binterval = ffs(bus_intval_mult); 280 if (!binterval || binterval > MAX_BINTERVAL_ISOC_EP) 281 return -EINVAL; 282 283 /* check if another bit is set then bail out */ 284 bus_intval_mult = bus_intval_mult >> binterval; 285 if (bus_intval_mult) 286 return -EINVAL; 287 288 return (binterval - 1); 289 } 290 291 /* maps audio format received over QMI to asound.h based pcm format */ 292 static snd_pcm_format_t map_pcm_format(enum usb_qmi_audio_format fmt_received) 293 { 294 switch (fmt_received) { 295 case USB_QMI_PCM_FORMAT_S8: 296 return SNDRV_PCM_FORMAT_S8; 297 case USB_QMI_PCM_FORMAT_U8: 298 return SNDRV_PCM_FORMAT_U8; 299 case USB_QMI_PCM_FORMAT_S16_LE: 300 return SNDRV_PCM_FORMAT_S16_LE; 301 case USB_QMI_PCM_FORMAT_S16_BE: 302 return SNDRV_PCM_FORMAT_S16_BE; 303 case USB_QMI_PCM_FORMAT_U16_LE: 304 return SNDRV_PCM_FORMAT_U16_LE; 305 case USB_QMI_PCM_FORMAT_U16_BE: 306 return SNDRV_PCM_FORMAT_U16_BE; 307 case USB_QMI_PCM_FORMAT_S24_LE: 308 return SNDRV_PCM_FORMAT_S24_LE; 309 case USB_QMI_PCM_FORMAT_S24_BE: 310 return SNDRV_PCM_FORMAT_S24_BE; 311 case USB_QMI_PCM_FORMAT_U24_LE: 312 return SNDRV_PCM_FORMAT_U24_LE; 313 case USB_QMI_PCM_FORMAT_U24_BE: 314 return SNDRV_PCM_FORMAT_U24_BE; 315 case USB_QMI_PCM_FORMAT_S24_3LE: 316 return SNDRV_PCM_FORMAT_S24_3LE; 317 case USB_QMI_PCM_FORMAT_S24_3BE: 318 return SNDRV_PCM_FORMAT_S24_3BE; 319 case USB_QMI_PCM_FORMAT_U24_3LE: 320 return SNDRV_PCM_FORMAT_U24_3LE; 321 case USB_QMI_PCM_FORMAT_U24_3BE: 322 return SNDRV_PCM_FORMAT_U24_3BE; 323 case USB_QMI_PCM_FORMAT_S32_LE: 324 return SNDRV_PCM_FORMAT_S32_LE; 325 case USB_QMI_PCM_FORMAT_S32_BE: 326 return SNDRV_PCM_FORMAT_S32_BE; 327 case USB_QMI_PCM_FORMAT_U32_LE: 328 return SNDRV_PCM_FORMAT_U32_LE; 329 case USB_QMI_PCM_FORMAT_U32_BE: 330 return SNDRV_PCM_FORMAT_U32_BE; 331 default: 332 /* 333 * We expect the caller to do input validation so we should 334 * never hit this. But we do have to return a proper 335 * snd_pcm_format_t value due to the __bitwise attribute; so 336 * just return the equivalent of 0 in case of bad input. 337 */ 338 return SNDRV_PCM_FORMAT_S8; 339 } 340 } 341 342 /* 343 * Sends QMI disconnect indication message, assumes chip->mutex and qdev_mutex 344 * lock held by caller. 345 */ 346 static int uaudio_send_disconnect_ind(struct snd_usb_audio *chip) 347 { 348 struct qmi_uaudio_stream_ind_msg_v01 disconnect_ind = {0}; 349 struct uaudio_qmi_svc *svc = uaudio_svc; 350 struct uaudio_dev *dev; 351 int ret = 0; 352 353 dev = &uadev[chip->card->number]; 354 355 if (atomic_read(&dev->in_use)) { 356 mutex_unlock(&chip->mutex); 357 mutex_unlock(&qdev_mutex); 358 dev_dbg(uaudio_qdev->data->dev, "sending qmi indication suspend\n"); 359 disconnect_ind.dev_event = USB_QMI_DEV_DISCONNECT_V01; 360 disconnect_ind.slot_id = dev->udev->slot_id; 361 disconnect_ind.controller_num = dev->usb_core_id; 362 disconnect_ind.controller_num_valid = 1; 363 ret = qmi_send_indication(svc->uaudio_svc_hdl, &svc->client_sq, 364 QMI_UAUDIO_STREAM_IND_V01, 365 QMI_UAUDIO_STREAM_IND_MSG_V01_MAX_MSG_LEN, 366 qmi_uaudio_stream_ind_msg_v01_ei, 367 &disconnect_ind); 368 if (ret < 0) 369 dev_err(uaudio_qdev->data->dev, 370 "qmi send failed with err: %d\n", ret); 371 372 ret = wait_event_interruptible_timeout(dev->disconnect_wq, 373 !atomic_read(&dev->in_use), 374 msecs_to_jiffies(DEV_RELEASE_WAIT_TIMEOUT)); 375 if (!ret) { 376 dev_err(uaudio_qdev->data->dev, 377 "timeout while waiting for dev_release\n"); 378 atomic_set(&dev->in_use, 0); 379 } else if (ret < 0) { 380 dev_err(uaudio_qdev->data->dev, 381 "failed with ret %d\n", ret); 382 atomic_set(&dev->in_use, 0); 383 } 384 mutex_lock(&qdev_mutex); 385 mutex_lock(&chip->mutex); 386 } 387 388 return ret; 389 } 390 391 /* Offloading IOMMU management */ 392 static unsigned long uaudio_get_iova(unsigned long *curr_iova, 393 size_t *curr_iova_size, 394 struct list_head *head, size_t size) 395 { 396 struct iova_info *info, *new_info = NULL; 397 struct list_head *curr_head; 398 size_t tmp_size = size; 399 unsigned long iova = 0; 400 401 if (size % PAGE_SIZE) 402 goto done; 403 404 if (size > *curr_iova_size) 405 goto done; 406 407 if (*curr_iova_size == 0) 408 goto done; 409 410 list_for_each_entry(info, head, list) { 411 /* exact size iova_info */ 412 if (!info->in_use && info->size == size) { 413 info->in_use = true; 414 iova = info->start_iova; 415 *curr_iova_size -= size; 416 goto done; 417 } else if (!info->in_use && tmp_size >= info->size) { 418 if (!new_info) 419 new_info = info; 420 tmp_size -= info->size; 421 if (tmp_size) 422 continue; 423 424 iova = new_info->start_iova; 425 for (curr_head = &new_info->list; curr_head != 426 &info->list; curr_head = curr_head->next) { 427 new_info = list_entry(curr_head, struct 428 iova_info, list); 429 new_info->in_use = true; 430 } 431 info->in_use = true; 432 *curr_iova_size -= size; 433 goto done; 434 } else { 435 /* iova region in use */ 436 new_info = NULL; 437 tmp_size = size; 438 } 439 } 440 441 info = kzalloc_obj(*info); 442 if (!info) { 443 iova = 0; 444 goto done; 445 } 446 447 iova = *curr_iova; 448 info->start_iova = *curr_iova; 449 info->size = size; 450 info->in_use = true; 451 *curr_iova += size; 452 *curr_iova_size -= size; 453 list_add_tail(&info->list, head); 454 455 done: 456 return iova; 457 } 458 459 static void uaudio_put_iova(unsigned long iova, size_t size, struct list_head 460 *head, size_t *curr_iova_size) 461 { 462 struct iova_info *info; 463 size_t tmp_size = size; 464 bool found = false; 465 466 list_for_each_entry(info, head, list) { 467 if (info->start_iova == iova) { 468 if (!info->in_use) 469 return; 470 471 found = true; 472 info->in_use = false; 473 if (info->size == size) 474 goto done; 475 } 476 477 if (found && tmp_size >= info->size) { 478 info->in_use = false; 479 tmp_size -= info->size; 480 if (!tmp_size) 481 goto done; 482 } 483 } 484 485 if (!found) 486 return; 487 488 done: 489 *curr_iova_size += size; 490 } 491 492 /** 493 * uaudio_iommu_unmap() - unmaps iommu memory for adsp 494 * @mtype: ring type 495 * @iova: virtual address to unmap 496 * @iova_size: region size 497 * @mapped_iova_size: mapped region size 498 * 499 * Unmaps the memory region that was previously assigned to the adsp. 500 * 501 */ 502 static void uaudio_iommu_unmap(enum mem_type mtype, unsigned long iova, 503 size_t iova_size, size_t mapped_iova_size) 504 { 505 size_t umap_size; 506 bool unmap = true; 507 508 if (!iova || !iova_size) 509 return; 510 511 switch (mtype) { 512 case MEM_EVENT_RING: 513 if (uaudio_qdev->er_mapped) 514 uaudio_qdev->er_mapped = false; 515 else 516 unmap = false; 517 break; 518 519 case MEM_XFER_RING: 520 uaudio_put_iova(iova, iova_size, &uaudio_qdev->xfer_ring_list, 521 &uaudio_qdev->xfer_ring_iova_size); 522 break; 523 case MEM_XFER_BUF: 524 uaudio_put_iova(iova, iova_size, &uaudio_qdev->xfer_buf_list, 525 &uaudio_qdev->xfer_buf_iova_size); 526 break; 527 default: 528 unmap = false; 529 } 530 531 if (!unmap || !mapped_iova_size) 532 return; 533 534 umap_size = iommu_unmap(uaudio_qdev->data->domain, iova, mapped_iova_size); 535 if (umap_size != mapped_iova_size) 536 dev_err(uaudio_qdev->data->dev, 537 "unmapped size %zu for iova 0x%08lx of mapped size %zu\n", 538 umap_size, iova, mapped_iova_size); 539 } 540 541 static int uaudio_iommu_map_prot(bool dma_coherent) 542 { 543 int prot = IOMMU_READ | IOMMU_WRITE; 544 545 if (dma_coherent) 546 prot |= IOMMU_CACHE; 547 return prot; 548 } 549 550 /** 551 * uaudio_iommu_map_pa() - maps iommu memory for adsp 552 * @mtype: ring type 553 * @dma_coherent: dma coherent 554 * @pa: physical address for ring/buffer 555 * @size: size of memory region 556 * 557 * Maps the XHCI related resources to a memory region that is assigned to be 558 * used by the adsp. This will be mapped to the domain, which is created by 559 * the ASoC USB backend driver. 560 * 561 */ 562 static unsigned long uaudio_iommu_map_pa(enum mem_type mtype, bool dma_coherent, 563 phys_addr_t pa, size_t size) 564 { 565 unsigned long iova = 0; 566 bool map = true; 567 int prot = uaudio_iommu_map_prot(dma_coherent); 568 int ret; 569 570 switch (mtype) { 571 case MEM_EVENT_RING: 572 iova = IOVA_BASE; 573 /* er already mapped */ 574 if (uaudio_qdev->er_mapped) 575 map = false; 576 break; 577 case MEM_XFER_RING: 578 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_ring_iova, 579 &uaudio_qdev->xfer_ring_iova_size, 580 &uaudio_qdev->xfer_ring_list, size); 581 break; 582 default: 583 dev_err(uaudio_qdev->data->dev, "unknown mem type %d\n", mtype); 584 } 585 586 if (!iova) 587 return 0; 588 589 if (!map) 590 return iova; 591 592 ret = iommu_map(uaudio_qdev->data->domain, iova, pa, size, prot, 593 GFP_KERNEL); 594 if (ret) { 595 dev_err(uaudio_qdev->data->dev, 596 "failed to map %zu bytes at iova 0x%08lx: %d\n", 597 size, iova, ret); 598 if (mtype == MEM_XFER_RING) 599 uaudio_put_iova(iova, size, 600 &uaudio_qdev->xfer_ring_list, 601 &uaudio_qdev->xfer_ring_iova_size); 602 return 0; 603 } 604 605 return iova; 606 } 607 608 static unsigned long uaudio_iommu_map_xfer_buf(bool dma_coherent, size_t size, 609 struct sg_table *sgt) 610 { 611 struct scatterlist *sg; 612 unsigned long iova = 0; 613 size_t total_len = 0; 614 unsigned long iova_sg; 615 phys_addr_t pa_sg; 616 size_t sg_len; 617 int prot = uaudio_iommu_map_prot(dma_coherent); 618 int ret; 619 int i; 620 621 prot = IOMMU_READ | IOMMU_WRITE; 622 623 if (dma_coherent) 624 prot |= IOMMU_CACHE; 625 626 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_buf_iova, 627 &uaudio_qdev->xfer_buf_iova_size, 628 &uaudio_qdev->xfer_buf_list, size); 629 if (!iova) 630 goto done; 631 632 iova_sg = iova; 633 for_each_sg(sgt->sgl, sg, sgt->nents, i) { 634 sg_len = PAGE_ALIGN(sg->offset + sg->length); 635 pa_sg = page_to_phys(sg_page(sg)); 636 ret = iommu_map(uaudio_qdev->data->domain, iova_sg, pa_sg, sg_len, 637 prot, GFP_KERNEL); 638 if (ret) { 639 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 640 iova = 0; 641 goto done; 642 } 643 644 iova_sg += sg_len; 645 total_len += sg_len; 646 } 647 648 if (size != total_len) { 649 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 650 iova = 0; 651 } 652 done: 653 return iova; 654 } 655 656 /* looks up alias, if any, for controller DT node and returns the index */ 657 static int usb_get_controller_id(struct usb_device *udev) 658 { 659 if (udev->bus->sysdev && udev->bus->sysdev->of_node) 660 return of_alias_get_id(udev->bus->sysdev->of_node, "usb"); 661 662 return -ENODEV; 663 } 664 665 /** 666 * uaudio_dev_intf_cleanup() - cleanup transfer resources 667 * @udev: usb device 668 * @info: usb offloading interface 669 * 670 * Cleans up the transfer ring related resources which are assigned per 671 * endpoint from XHCI. This is invoked when the USB endpoints are no 672 * longer in use by the adsp. 673 * 674 */ 675 static void uaudio_dev_intf_cleanup(struct usb_device *udev, struct intf_info *info) 676 { 677 uaudio_iommu_unmap(MEM_XFER_RING, info->data_xfer_ring_va, 678 info->data_xfer_ring_size, info->data_xfer_ring_size); 679 info->data_xfer_ring_va = 0; 680 info->data_xfer_ring_size = 0; 681 682 uaudio_iommu_unmap(MEM_XFER_RING, info->sync_xfer_ring_va, 683 info->sync_xfer_ring_size, info->sync_xfer_ring_size); 684 info->sync_xfer_ring_va = 0; 685 info->sync_xfer_ring_size = 0; 686 687 uaudio_iommu_unmap(MEM_XFER_BUF, info->xfer_buf_iova, info->xfer_buf_size, 688 info->xfer_buf_size); 689 info->xfer_buf_iova = 0; 690 691 usb_free_coherent(udev, info->xfer_buf_size, info->xfer_buf_cpu, 692 info->xfer_buf_dma); 693 info->xfer_buf_size = 0; 694 info->xfer_buf_cpu = NULL; 695 info->xfer_buf_dma = 0; 696 697 info->in_use = false; 698 } 699 700 /** 701 * uaudio_event_ring_cleanup_free() - cleanup secondary event ring 702 * @dev: usb offload device 703 * 704 * Cleans up the secondary event ring that was requested. This will 705 * occur when the adsp is no longer transferring data on the USB bus 706 * across all endpoints. 707 * 708 */ 709 static void uaudio_event_ring_cleanup_free(struct uaudio_dev *dev) 710 { 711 clear_bit(dev->chip->card->number, &uaudio_qdev->card_slot); 712 /* all audio devices are disconnected */ 713 if (!uaudio_qdev->card_slot) { 714 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, 715 PAGE_SIZE); 716 xhci_sideband_remove_interrupter(uadev[dev->chip->card->number].sb); 717 usb_offload_put(dev->udev); 718 } 719 } 720 721 static void uaudio_dev_cleanup(struct uaudio_dev *dev) 722 { 723 int if_idx; 724 725 if (!dev->udev) 726 return; 727 728 /* free xfer buffer and unmap xfer ring and buf per interface */ 729 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 730 if (!dev->info[if_idx].in_use) 731 continue; 732 uaudio_dev_intf_cleanup(dev->udev, &dev->info[if_idx]); 733 dev_dbg(uaudio_qdev->data->dev, 734 "release resources: intf# %d card# %d\n", 735 dev->info[if_idx].intf_num, dev->chip->card->number); 736 } 737 738 dev->num_intf = 0; 739 740 /* free interface info */ 741 kfree(dev->info); 742 dev->info = NULL; 743 uaudio_event_ring_cleanup_free(dev); 744 dev->udev = NULL; 745 } 746 747 /** 748 * disable_audio_stream() - disable usb snd endpoints 749 * @subs: usb substream 750 * 751 * Closes the USB SND endpoints associated with the current audio stream 752 * used. This will decrement the USB SND endpoint opened reference count. 753 * 754 */ 755 static void disable_audio_stream(struct snd_usb_substream *subs) 756 { 757 struct snd_usb_audio *chip = subs->stream->chip; 758 759 snd_usb_hw_free(subs); 760 snd_usb_autosuspend(chip); 761 } 762 763 /* QMI service disconnect handlers */ 764 static void qmi_stop_session(void) 765 { 766 struct snd_usb_substream *subs; 767 struct usb_host_endpoint *ep; 768 struct snd_usb_audio *chip; 769 struct intf_info *info; 770 int pcm_card_num; 771 int if_idx; 772 int idx; 773 774 guard(mutex)(&qdev_mutex); 775 /* find all active intf for set alt 0 and cleanup usb audio dev */ 776 for (idx = 0; idx < SNDRV_CARDS; idx++) { 777 if (!atomic_read(&uadev[idx].in_use)) 778 continue; 779 780 chip = uadev[idx].chip; 781 for (if_idx = 0; if_idx < uadev[idx].num_intf; if_idx++) { 782 if (!uadev[idx].info || !uadev[idx].info[if_idx].in_use) 783 continue; 784 info = &uadev[idx].info[if_idx]; 785 pcm_card_num = info->pcm_card_num; 786 subs = find_substream(pcm_card_num, info->pcm_dev_num, 787 info->direction); 788 if (!subs || !chip || atomic_read(&chip->shutdown)) { 789 dev_err(&uadev[idx].udev->dev, 790 "no sub for c#%u dev#%u dir%u\n", 791 info->pcm_card_num, 792 info->pcm_dev_num, 793 info->direction); 794 continue; 795 } 796 /* Release XHCI endpoints */ 797 if (info->data_ep_pipe) { 798 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 799 info->data_ep_pipe); 800 if (ep) 801 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 802 ep); 803 info->data_ep_pipe = 0; 804 } 805 806 if (info->sync_ep_pipe) { 807 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 808 info->sync_ep_pipe); 809 if (ep) 810 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 811 ep); 812 info->sync_ep_pipe = 0; 813 } 814 815 disable_audio_stream(subs); 816 } 817 atomic_set(&uadev[idx].in_use, 0); 818 guard(mutex)(&chip->mutex); 819 uaudio_dev_cleanup(&uadev[idx]); 820 } 821 } 822 823 /** 824 * uaudio_sideband_notifier() - xHCI sideband event handler 825 * @intf: USB interface handle 826 * @evt: xHCI sideband event type 827 * 828 * This callback is executed when the xHCI sideband encounters a sequence 829 * that requires the sideband clients to take action. An example, is when 830 * xHCI frees the transfer ring, so the client has to ensure that the 831 * offload path is halted. 832 * 833 */ 834 static int uaudio_sideband_notifier(struct usb_interface *intf, 835 struct xhci_sideband_event *evt) 836 { 837 struct snd_usb_audio *chip; 838 struct uaudio_dev *dev; 839 int if_idx; 840 841 if (!intf || !evt) 842 return 0; 843 844 chip = usb_get_intfdata(intf); 845 846 guard(mutex)(&qdev_mutex); 847 guard(mutex)(&chip->mutex); 848 849 dev = &uadev[chip->card->number]; 850 851 if (evt->type == XHCI_SIDEBAND_XFER_RING_FREE) { 852 unsigned int *ep = (unsigned int *) evt->evt_data; 853 854 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 855 if (dev->info[if_idx].data_ep_idx == *ep || 856 dev->info[if_idx].sync_ep_idx == *ep) 857 uaudio_send_disconnect_ind(chip); 858 } 859 } 860 861 return 0; 862 } 863 864 /** 865 * qmi_bye_cb() - qmi bye message callback 866 * @handle: QMI handle 867 * @node: id of the dying node 868 * 869 * This callback is invoked when the QMI bye control message is received 870 * from the QMI client. Handle the message accordingly by ensuring that 871 * the USB offload path is disabled and cleaned up. At this point, ADSP 872 * is not utilizing the USB bus. 873 * 874 */ 875 static void qmi_bye_cb(struct qmi_handle *handle, unsigned int node) 876 { 877 struct uaudio_qmi_svc *svc = uaudio_svc; 878 879 if (svc->uaudio_svc_hdl != handle) 880 return; 881 882 if (svc->client_connected && svc->client_sq.sq_node == node) { 883 qmi_stop_session(); 884 885 /* clear QMI client parameters to block further QMI messages */ 886 svc->client_sq.sq_node = 0; 887 svc->client_sq.sq_port = 0; 888 svc->client_sq.sq_family = 0; 889 svc->client_connected = false; 890 } 891 } 892 893 /** 894 * qmi_svc_disconnect_cb() - qmi client disconnected 895 * @handle: QMI handle 896 * @node: id of the dying node 897 * @port: port of the dying client 898 * 899 * Invoked when the remote QMI client is disconnected. Handle this event 900 * the same way as when the QMI bye message is received. This will ensure 901 * the USB offloading path is disabled and cleaned up. 902 * 903 */ 904 static void qmi_svc_disconnect_cb(struct qmi_handle *handle, 905 unsigned int node, unsigned int port) 906 { 907 struct uaudio_qmi_svc *svc; 908 909 if (!uaudio_svc) 910 return; 911 912 svc = uaudio_svc; 913 if (svc->uaudio_svc_hdl != handle) 914 return; 915 916 if (svc->client_connected && svc->client_sq.sq_node == node && 917 svc->client_sq.sq_port == port) { 918 qmi_stop_session(); 919 920 /* clear QMI client parameters to block further QMI messages */ 921 svc->client_sq.sq_node = 0; 922 svc->client_sq.sq_port = 0; 923 svc->client_sq.sq_family = 0; 924 svc->client_connected = false; 925 } 926 } 927 928 /* QMI client callback handlers from QMI interface */ 929 static struct qmi_ops uaudio_svc_ops_options = { 930 .bye = qmi_bye_cb, 931 .del_client = qmi_svc_disconnect_cb, 932 }; 933 934 /* kref release callback when all streams are disabled */ 935 static void uaudio_dev_release(struct kref *kref) 936 { 937 struct uaudio_dev *dev = container_of(kref, struct uaudio_dev, kref); 938 939 uaudio_event_ring_cleanup_free(dev); 940 atomic_set(&dev->in_use, 0); 941 wake_up(&dev->disconnect_wq); 942 } 943 944 /** 945 * enable_audio_stream() - enable usb snd endpoints 946 * @subs: usb substream 947 * @pcm_format: pcm format requested 948 * @channels: number of channels 949 * @cur_rate: sample rate 950 * @datainterval: interval 951 * 952 * Opens all USB SND endpoints used for the data interface. This will increment 953 * the USB SND endpoint's opened count. Requests to keep the interface resumed 954 * until the audio stream is stopped. Will issue the USB set interface control 955 * message to enable the data interface. 956 * 957 */ 958 static int enable_audio_stream(struct snd_usb_substream *subs, 959 snd_pcm_format_t pcm_format, 960 unsigned int channels, unsigned int cur_rate, 961 int datainterval) 962 { 963 struct snd_pcm_hw_params params; 964 struct snd_usb_audio *chip; 965 struct snd_interval *i; 966 struct snd_mask *m; 967 int ret; 968 969 chip = subs->stream->chip; 970 971 _snd_pcm_hw_params_any(¶ms); 972 973 m = hw_param_mask(¶ms, SNDRV_PCM_HW_PARAM_FORMAT); 974 snd_mask_leave(m, (__force unsigned int)pcm_format); 975 976 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_CHANNELS); 977 snd_interval_setinteger(i); 978 i->min = channels; 979 i->max = channels; 980 981 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_RATE); 982 snd_interval_setinteger(i); 983 i->min = cur_rate; 984 i->max = cur_rate; 985 986 pm_runtime_barrier(&chip->intf[0]->dev); 987 snd_usb_autoresume(chip); 988 989 ret = snd_usb_hw_params(subs, ¶ms); 990 if (ret < 0) 991 goto put_suspend; 992 993 if (!atomic_read(&chip->shutdown)) { 994 CLASS(snd_usb_lock, pm)(chip); 995 if (pm.err < 0) { 996 ret = pm.err; 997 goto detach_ep; 998 } 999 1000 if (subs->sync_endpoint) { 1001 ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); 1002 if (ret < 0) 1003 goto detach_ep; 1004 } 1005 1006 ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); 1007 if (ret < 0) 1008 goto detach_ep; 1009 1010 dev_dbg(uaudio_qdev->data->dev, 1011 "selected %s iface:%d altsetting:%d datainterval:%dus\n", 1012 subs->direction ? "capture" : "playback", 1013 subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting, 1014 (1 << subs->cur_audiofmt->datainterval) * 1015 (subs->dev->speed >= USB_SPEED_HIGH ? 1016 BUS_INTERVAL_HIGHSPEED_AND_ABOVE : 1017 BUS_INTERVAL_FULL_SPEED)); 1018 } 1019 1020 return 0; 1021 1022 detach_ep: 1023 snd_usb_hw_free(subs); 1024 1025 put_suspend: 1026 snd_usb_autosuspend(chip); 1027 1028 return ret; 1029 } 1030 1031 /** 1032 * uaudio_transfer_buffer_setup() - fetch and populate xfer buffer params 1033 * @subs: usb substream 1034 * @xfer_buf_cpu: xfer buf to be allocated 1035 * @xfer_buf_len: size of allocation 1036 * @mem_info: QMI response info 1037 * 1038 * Allocates and maps the transfer buffers that will be utilized by the 1039 * audio DSP. Will populate the information in the QMI response that is 1040 * sent back to the stream enable request. 1041 * 1042 */ 1043 static int uaudio_transfer_buffer_setup(struct snd_usb_substream *subs, 1044 void **xfer_buf_cpu, u32 xfer_buf_len, 1045 struct mem_info_v01 *mem_info) 1046 { 1047 struct sg_table xfer_buf_sgt; 1048 dma_addr_t xfer_buf_dma; 1049 void *xfer_buf; 1050 u32 len = xfer_buf_len; 1051 bool dma_coherent; 1052 dma_addr_t xfer_buf_dma_sysdev; 1053 int ret; 1054 1055 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1056 1057 /* xfer buffer, multiple of 4K only */ 1058 if (!len) 1059 len = PAGE_SIZE; 1060 1061 len = PAGE_ALIGN(len); 1062 1063 if (len > MAX_XFER_BUFF_LEN) { 1064 dev_err(uaudio_qdev->data->dev, 1065 "req buf len %d > max buf len %lu, setting %lu\n", 1066 len, MAX_XFER_BUFF_LEN, MAX_XFER_BUFF_LEN); 1067 len = MAX_XFER_BUFF_LEN; 1068 } 1069 1070 /* get buffer mapped into subs->dev */ 1071 xfer_buf = usb_alloc_coherent(subs->dev, len, GFP_KERNEL, &xfer_buf_dma); 1072 if (!xfer_buf) 1073 return -ENOMEM; 1074 1075 ret = dma_get_sgtable(subs->dev->bus->sysdev, &xfer_buf_sgt, xfer_buf, 1076 xfer_buf_dma, len); 1077 if (ret) 1078 goto free_xfer_buf; 1079 1080 /* map the physical buffer into sysdev as well */ 1081 xfer_buf_dma_sysdev = uaudio_iommu_map_xfer_buf(dma_coherent, 1082 len, &xfer_buf_sgt); 1083 if (!xfer_buf_dma_sysdev) { 1084 ret = -ENOMEM; 1085 goto free_sgt; 1086 } 1087 1088 mem_info->dma = xfer_buf_dma; 1089 mem_info->size = len; 1090 mem_info->iova = PREPEND_SID_TO_IOVA(xfer_buf_dma_sysdev, uaudio_qdev->data->sid); 1091 *xfer_buf_cpu = xfer_buf; 1092 sg_free_table(&xfer_buf_sgt); 1093 1094 return 0; 1095 1096 free_sgt: 1097 sg_free_table(&xfer_buf_sgt); 1098 free_xfer_buf: 1099 usb_free_coherent(subs->dev, len, xfer_buf, xfer_buf_dma); 1100 1101 return ret; 1102 } 1103 1104 /** 1105 * uaudio_endpoint_setup() - fetch and populate endpoint params 1106 * @subs: usb substream 1107 * @endpoint: usb endpoint to add 1108 * @card_num: uadev index 1109 * @mem_info: QMI response info 1110 * @ep_desc: QMI ep desc response field 1111 * 1112 * Initialize the USB endpoint being used for a particular USB 1113 * stream. Will request XHCI sec intr to reserve the EP for 1114 * offloading as well as populating the QMI response with the 1115 * transfer ring parameters. 1116 * 1117 */ 1118 static phys_addr_t 1119 uaudio_endpoint_setup(struct snd_usb_substream *subs, 1120 struct snd_usb_endpoint *endpoint, int card_num, 1121 struct mem_info_v01 *mem_info, 1122 struct usb_endpoint_descriptor_v01 *ep_desc) 1123 { 1124 struct usb_host_endpoint *ep; 1125 phys_addr_t tr_pa = 0; 1126 struct sg_table *sgt; 1127 bool dma_coherent; 1128 unsigned long iova; 1129 struct page *pg; 1130 int ret = -ENODEV; 1131 1132 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1133 1134 ep = usb_pipe_endpoint(subs->dev, endpoint->pipe); 1135 if (!ep) { 1136 dev_err(uaudio_qdev->data->dev, "data ep # %d context is null\n", 1137 subs->data_endpoint->ep_num); 1138 goto exit; 1139 } 1140 1141 memcpy(ep_desc, &ep->desc, sizeof(ep->desc)); 1142 1143 ret = xhci_sideband_add_endpoint(uadev[card_num].sb, ep); 1144 if (ret < 0) { 1145 dev_err(&subs->dev->dev, 1146 "failed to add data ep to sec intr: %d\n", ret); 1147 ret = -ENODEV; 1148 goto exit; 1149 } 1150 1151 sgt = xhci_sideband_get_endpoint_buffer(uadev[card_num].sb, ep); 1152 if (!sgt) { 1153 dev_err(&subs->dev->dev, 1154 "failed to get data ep ring address: %d\n", ret); 1155 ret = -ENODEV; 1156 goto remove_ep; 1157 } 1158 1159 pg = sg_page(sgt->sgl); 1160 tr_pa = page_to_phys(pg); 1161 mem_info->dma = sg_dma_address(sgt->sgl); 1162 sg_free_table(sgt); 1163 1164 /* data transfer ring */ 1165 iova = uaudio_iommu_map_pa(MEM_XFER_RING, dma_coherent, tr_pa, 1166 PAGE_SIZE); 1167 if (!iova) { 1168 ret = -ENOMEM; 1169 goto clear_pa; 1170 } 1171 1172 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1173 mem_info->size = PAGE_SIZE; 1174 1175 return 0; 1176 1177 clear_pa: 1178 mem_info->dma = 0; 1179 remove_ep: 1180 xhci_sideband_remove_endpoint(uadev[card_num].sb, ep); 1181 exit: 1182 return ret; 1183 } 1184 1185 /** 1186 * uaudio_event_ring_setup() - fetch and populate event ring params 1187 * @subs: usb substream 1188 * @card_num: uadev index 1189 * @mem_info: QMI response info 1190 * 1191 * Register secondary interrupter to XHCI and fetch the event buffer info 1192 * and populate the information into the QMI response. 1193 * 1194 */ 1195 static int uaudio_event_ring_setup(struct snd_usb_substream *subs, 1196 int card_num, struct mem_info_v01 *mem_info) 1197 { 1198 struct sg_table *sgt; 1199 phys_addr_t er_pa; 1200 bool dma_coherent; 1201 unsigned long iova; 1202 struct page *pg; 1203 int ret; 1204 1205 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1206 er_pa = 0; 1207 1208 ret = usb_offload_get(subs->dev); 1209 if (ret < 0) 1210 goto exit; 1211 1212 /* event ring */ 1213 ret = xhci_sideband_create_interrupter(uadev[card_num].sb, 1, false, 1214 0, uaudio_qdev->data->intr_num); 1215 if (ret < 0) { 1216 dev_err(&subs->dev->dev, "failed to fetch interrupter\n"); 1217 goto put_offload; 1218 } 1219 1220 sgt = xhci_sideband_get_event_buffer(uadev[card_num].sb); 1221 if (!sgt) { 1222 dev_err(&subs->dev->dev, 1223 "failed to get event ring address\n"); 1224 ret = -ENODEV; 1225 goto remove_interrupter; 1226 } 1227 1228 pg = sg_page(sgt->sgl); 1229 er_pa = page_to_phys(pg); 1230 mem_info->dma = sg_dma_address(sgt->sgl); 1231 sg_free_table(sgt); 1232 1233 iova = uaudio_iommu_map_pa(MEM_EVENT_RING, dma_coherent, er_pa, 1234 PAGE_SIZE); 1235 if (!iova) { 1236 ret = -ENOMEM; 1237 goto clear_pa; 1238 } 1239 1240 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1241 mem_info->size = PAGE_SIZE; 1242 1243 return 0; 1244 1245 clear_pa: 1246 mem_info->dma = 0; 1247 remove_interrupter: 1248 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1249 put_offload: 1250 usb_offload_put(subs->dev); 1251 exit: 1252 return ret; 1253 } 1254 1255 /** 1256 * uaudio_populate_uac_desc() - parse UAC parameters and populate QMI resp 1257 * @subs: usb substream 1258 * @resp: QMI response buffer 1259 * 1260 * Parses information specified within UAC descriptors which explain the 1261 * sample parameters that the device expects. This information is populated 1262 * to the QMI response sent back to the audio DSP. 1263 * 1264 */ 1265 static int uaudio_populate_uac_desc(struct snd_usb_substream *subs, 1266 struct qmi_uaudio_stream_resp_msg_v01 *resp) 1267 { 1268 struct usb_interface_descriptor *altsd; 1269 struct usb_host_interface *alts; 1270 struct usb_interface *iface; 1271 int protocol; 1272 1273 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface); 1274 if (!iface) { 1275 dev_err(&subs->dev->dev, "interface # %d does not exist\n", 1276 subs->cur_audiofmt->iface); 1277 return -ENODEV; 1278 } 1279 1280 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx]; 1281 altsd = get_iface_desc(alts); 1282 protocol = altsd->bInterfaceProtocol; 1283 1284 if (protocol == UAC_VERSION_1) { 1285 struct uac1_as_header_descriptor *as; 1286 1287 as = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, 1288 UAC_AS_GENERAL); 1289 if (!as) { 1290 dev_err(&subs->dev->dev, 1291 "%u:%d : no UAC_AS_GENERAL desc\n", 1292 subs->cur_audiofmt->iface, 1293 subs->cur_audiofmt->altset_idx); 1294 return -ENODEV; 1295 } 1296 1297 resp->data_path_delay = as->bDelay; 1298 resp->data_path_delay_valid = 1; 1299 1300 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1301 resp->usb_audio_subslot_size_valid = 1; 1302 1303 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0100); 1304 resp->usb_audio_spec_revision_valid = 1; 1305 } else if (protocol == UAC_VERSION_2) { 1306 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1307 resp->usb_audio_subslot_size_valid = 1; 1308 1309 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0200); 1310 resp->usb_audio_spec_revision_valid = 1; 1311 } else if (protocol == UAC_VERSION_3) { 1312 if (iface->intf_assoc->bFunctionSubClass == 1313 UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0) { 1314 dev_err(&subs->dev->dev, 1315 "full adc is not supported\n"); 1316 return -EINVAL; 1317 } 1318 1319 switch (le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize)) { 1320 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: 1321 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: 1322 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: 1323 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: { 1324 resp->usb_audio_subslot_size = 0x2; 1325 break; 1326 } 1327 1328 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: 1329 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: 1330 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: 1331 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: { 1332 resp->usb_audio_subslot_size = 0x3; 1333 break; 1334 } 1335 1336 default: 1337 dev_err(&subs->dev->dev, 1338 "%d: %u: Invalid wMaxPacketSize\n", 1339 subs->cur_audiofmt->iface, 1340 subs->cur_audiofmt->altset_idx); 1341 return -EINVAL; 1342 } 1343 resp->usb_audio_subslot_size_valid = 1; 1344 } else { 1345 dev_err(&subs->dev->dev, "unknown protocol version %x\n", 1346 protocol); 1347 return -ENODEV; 1348 } 1349 1350 memcpy(&resp->std_as_opr_intf_desc, &alts->desc, sizeof(alts->desc)); 1351 1352 return 0; 1353 } 1354 1355 /** 1356 * prepare_qmi_response() - prepare stream enable response 1357 * @subs: usb substream 1358 * @req_msg: QMI request message 1359 * @resp: QMI response buffer 1360 * @info_idx: usb interface array index 1361 * 1362 * Prepares the QMI response for a USB QMI stream enable request. Will parse 1363 * out the parameters within the stream enable request, in order to match 1364 * requested audio profile to the ones exposed by the USB device connected. 1365 * 1366 * In addition, will fetch the XHCI transfer resources needed for the handoff to 1367 * happen. This includes, transfer ring and buffer addresses and secondary event 1368 * ring address. These parameters will be communicated as part of the USB QMI 1369 * stream enable response. 1370 * 1371 */ 1372 static int prepare_qmi_response(struct snd_usb_substream *subs, 1373 struct qmi_uaudio_stream_req_msg_v01 *req_msg, 1374 struct qmi_uaudio_stream_resp_msg_v01 *resp, 1375 int info_idx) 1376 { 1377 struct q6usb_offload *data; 1378 int pcm_dev_num; 1379 int card_num; 1380 void *xfer_buf_cpu; 1381 int ret; 1382 1383 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1384 card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1385 1386 if (!uadev[card_num].ctrl_intf) { 1387 dev_err(&subs->dev->dev, "audio ctrl intf info not cached\n"); 1388 return -ENODEV; 1389 } 1390 1391 ret = uaudio_populate_uac_desc(subs, resp); 1392 if (ret < 0) 1393 return ret; 1394 1395 resp->slot_id = subs->dev->slot_id; 1396 resp->slot_id_valid = 1; 1397 1398 data = snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent); 1399 if (!data) { 1400 dev_err(&subs->dev->dev, "No private data found\n"); 1401 return -ENODEV; 1402 } 1403 1404 uaudio_qdev->data = data; 1405 1406 resp->std_as_opr_intf_desc_valid = 1; 1407 ret = uaudio_endpoint_setup(subs, subs->data_endpoint, card_num, 1408 &resp->xhci_mem_info.tr_data, 1409 &resp->std_as_data_ep_desc); 1410 if (ret < 0) 1411 return ret; 1412 1413 resp->std_as_data_ep_desc_valid = 1; 1414 1415 if (subs->sync_endpoint) { 1416 ret = uaudio_endpoint_setup(subs, subs->sync_endpoint, card_num, 1417 &resp->xhci_mem_info.tr_sync, 1418 &resp->std_as_sync_ep_desc); 1419 if (ret < 0) 1420 goto drop_data_ep; 1421 1422 resp->std_as_sync_ep_desc_valid = 1; 1423 } 1424 1425 resp->interrupter_num_valid = 1; 1426 resp->controller_num_valid = 0; 1427 ret = usb_get_controller_id(subs->dev); 1428 if (ret >= 0) { 1429 resp->controller_num = ret; 1430 resp->controller_num_valid = 1; 1431 } 1432 1433 /* event ring */ 1434 ret = uaudio_event_ring_setup(subs, card_num, 1435 &resp->xhci_mem_info.evt_ring); 1436 if (ret < 0) 1437 goto drop_sync_ep; 1438 1439 uaudio_qdev->er_mapped = true; 1440 resp->interrupter_num = xhci_sideband_interrupter_id(uadev[card_num].sb); 1441 1442 resp->speed_info = get_speed_info(subs->dev->speed); 1443 if (resp->speed_info == USB_QMI_DEVICE_SPEED_INVALID_V01) { 1444 ret = -ENODEV; 1445 goto free_sec_ring; 1446 } 1447 1448 resp->speed_info_valid = 1; 1449 1450 ret = uaudio_transfer_buffer_setup(subs, &xfer_buf_cpu, req_msg->xfer_buff_size, 1451 &resp->xhci_mem_info.xfer_buff); 1452 if (ret < 0) { 1453 ret = -ENOMEM; 1454 goto free_sec_ring; 1455 } 1456 1457 resp->xhci_mem_info_valid = 1; 1458 1459 if (!atomic_read(&uadev[card_num].in_use)) { 1460 kref_init(&uadev[card_num].kref); 1461 init_waitqueue_head(&uadev[card_num].disconnect_wq); 1462 uadev[card_num].num_intf = 1463 subs->dev->config->desc.bNumInterfaces; 1464 uadev[card_num].info = kzalloc_objs(struct intf_info, 1465 uadev[card_num].num_intf); 1466 if (!uadev[card_num].info) { 1467 ret = -ENOMEM; 1468 goto unmap_er; 1469 } 1470 uadev[card_num].udev = subs->dev; 1471 atomic_set(&uadev[card_num].in_use, 1); 1472 } else { 1473 kref_get(&uadev[card_num].kref); 1474 } 1475 1476 uadev[card_num].usb_core_id = resp->controller_num; 1477 1478 /* cache intf specific info to use it for unmap and free xfer buf */ 1479 uadev[card_num].info[info_idx].data_xfer_ring_va = 1480 IOVA_MASK(resp->xhci_mem_info.tr_data.iova); 1481 uadev[card_num].info[info_idx].data_xfer_ring_size = PAGE_SIZE; 1482 uadev[card_num].info[info_idx].sync_xfer_ring_va = 1483 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova); 1484 uadev[card_num].info[info_idx].sync_xfer_ring_size = PAGE_SIZE; 1485 uadev[card_num].info[info_idx].xfer_buf_iova = 1486 IOVA_MASK(resp->xhci_mem_info.xfer_buff.iova); 1487 uadev[card_num].info[info_idx].xfer_buf_dma = 1488 resp->xhci_mem_info.xfer_buff.dma; 1489 uadev[card_num].info[info_idx].xfer_buf_size = 1490 resp->xhci_mem_info.xfer_buff.size; 1491 uadev[card_num].info[info_idx].data_ep_pipe = subs->data_endpoint ? 1492 subs->data_endpoint->pipe : 0; 1493 uadev[card_num].info[info_idx].sync_ep_pipe = subs->sync_endpoint ? 1494 subs->sync_endpoint->pipe : 0; 1495 uadev[card_num].info[info_idx].data_ep_idx = subs->data_endpoint ? 1496 subs->data_endpoint->ep_num : 0; 1497 uadev[card_num].info[info_idx].sync_ep_idx = subs->sync_endpoint ? 1498 subs->sync_endpoint->ep_num : 0; 1499 uadev[card_num].info[info_idx].xfer_buf_cpu = xfer_buf_cpu; 1500 uadev[card_num].info[info_idx].pcm_card_num = card_num; 1501 uadev[card_num].info[info_idx].pcm_dev_num = pcm_dev_num; 1502 uadev[card_num].info[info_idx].direction = subs->direction; 1503 uadev[card_num].info[info_idx].intf_num = subs->cur_audiofmt->iface; 1504 uadev[card_num].info[info_idx].in_use = true; 1505 1506 set_bit(card_num, &uaudio_qdev->card_slot); 1507 1508 return 0; 1509 1510 unmap_er: 1511 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, PAGE_SIZE); 1512 free_sec_ring: 1513 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1514 usb_offload_put(subs->dev); 1515 drop_sync_ep: 1516 if (subs->sync_endpoint) { 1517 uaudio_iommu_unmap(MEM_XFER_RING, 1518 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova), 1519 PAGE_SIZE, PAGE_SIZE); 1520 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1521 usb_pipe_endpoint(subs->dev, subs->sync_endpoint->pipe)); 1522 } 1523 drop_data_ep: 1524 uaudio_iommu_unmap(MEM_XFER_RING, IOVA_MASK(resp->xhci_mem_info.tr_data.iova), 1525 PAGE_SIZE, PAGE_SIZE); 1526 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1527 usb_pipe_endpoint(subs->dev, subs->data_endpoint->pipe)); 1528 1529 return ret; 1530 } 1531 1532 /** 1533 * handle_uaudio_stream_req() - handle stream enable/disable request 1534 * @handle: QMI client handle 1535 * @sq: qrtr socket 1536 * @txn: QMI transaction context 1537 * @decoded_msg: decoded QMI message 1538 * 1539 * Main handler for the QMI stream enable/disable requests. This executes the 1540 * corresponding enable/disable stream apis, respectively. 1541 * 1542 */ 1543 static void handle_uaudio_stream_req(struct qmi_handle *handle, 1544 struct sockaddr_qrtr *sq, 1545 struct qmi_txn *txn, 1546 const void *decoded_msg) 1547 { 1548 struct qmi_uaudio_stream_req_msg_v01 *req_msg; 1549 struct qmi_uaudio_stream_resp_msg_v01 resp = {{0}, 0}; 1550 struct uaudio_qmi_svc *svc = uaudio_svc; 1551 struct snd_usb_audio *chip = NULL; 1552 struct snd_usb_substream *subs; 1553 struct usb_host_endpoint *ep; 1554 int datainterval = -EINVAL; 1555 int info_idx = -EINVAL; 1556 struct intf_info *info; 1557 u8 pcm_card_num; 1558 u8 pcm_dev_num; 1559 u8 direction; 1560 int ret = 0; 1561 1562 if (!svc->client_connected) { 1563 svc->client_sq = *sq; 1564 svc->client_connected = true; 1565 } 1566 1567 mutex_lock(&qdev_mutex); 1568 req_msg = (struct qmi_uaudio_stream_req_msg_v01 *)decoded_msg; 1569 if (!req_msg->audio_format_valid || !req_msg->bit_rate_valid || 1570 !req_msg->number_of_ch_valid || !req_msg->xfer_buff_size_valid) { 1571 ret = -EINVAL; 1572 goto response; 1573 } 1574 1575 if (!uaudio_qdev) { 1576 ret = -EINVAL; 1577 goto response; 1578 } 1579 1580 direction = (req_msg->usb_token & QMI_STREAM_REQ_DIRECTION); 1581 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1582 pcm_card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1583 if (pcm_card_num >= SNDRV_CARDS) { 1584 ret = -EINVAL; 1585 goto response; 1586 } 1587 1588 if (req_msg->audio_format > USB_QMI_PCM_FORMAT_U32_BE) { 1589 ret = -EINVAL; 1590 goto response; 1591 } 1592 1593 subs = find_substream(pcm_card_num, pcm_dev_num, direction); 1594 chip = uadev[pcm_card_num].chip; 1595 if (!subs || !chip || atomic_read(&chip->shutdown)) { 1596 ret = -ENODEV; 1597 goto response; 1598 } 1599 1600 info_idx = info_idx_from_ifnum(pcm_card_num, subs->cur_audiofmt ? 1601 subs->cur_audiofmt->iface : -1, req_msg->enable); 1602 if (atomic_read(&chip->shutdown) || !subs->stream || !subs->stream->pcm || 1603 !subs->stream->chip) { 1604 ret = -ENODEV; 1605 goto response; 1606 } 1607 1608 scoped_guard(mutex, &chip->mutex) { 1609 if (req_msg->enable) { 1610 if (info_idx < 0 || chip->system_suspend || subs->opened) { 1611 ret = -EBUSY; 1612 goto response; 1613 } 1614 subs->opened = 1; 1615 } 1616 } 1617 1618 if (req_msg->service_interval_valid) { 1619 ret = get_data_interval_from_si(subs, 1620 req_msg->service_interval); 1621 if (ret == -EINVAL) 1622 goto response; 1623 1624 datainterval = ret; 1625 } 1626 1627 uadev[pcm_card_num].ctrl_intf = chip->ctrl_intf; 1628 1629 if (req_msg->enable) { 1630 ret = enable_audio_stream(subs, 1631 map_pcm_format(req_msg->audio_format), 1632 req_msg->number_of_ch, req_msg->bit_rate, 1633 datainterval); 1634 1635 if (!ret) 1636 ret = prepare_qmi_response(subs, req_msg, &resp, 1637 info_idx); 1638 if (ret < 0) { 1639 guard(mutex)(&chip->mutex); 1640 subs->opened = 0; 1641 } 1642 } else { 1643 info = &uadev[pcm_card_num].info[info_idx]; 1644 if (info->data_ep_pipe) { 1645 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 1646 info->data_ep_pipe); 1647 if (ep) { 1648 xhci_sideband_stop_endpoint(uadev[pcm_card_num].sb, 1649 ep); 1650 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 1651 ep); 1652 } 1653 1654 info->data_ep_pipe = 0; 1655 } 1656 1657 if (info->sync_ep_pipe) { 1658 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 1659 info->sync_ep_pipe); 1660 if (ep) { 1661 xhci_sideband_stop_endpoint(uadev[pcm_card_num].sb, 1662 ep); 1663 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 1664 ep); 1665 } 1666 1667 info->sync_ep_pipe = 0; 1668 } 1669 1670 disable_audio_stream(subs); 1671 guard(mutex)(&chip->mutex); 1672 subs->opened = 0; 1673 } 1674 1675 response: 1676 if (!req_msg->enable && ret != -EINVAL && ret != -ENODEV) { 1677 guard(mutex)(&chip->mutex); 1678 if (info_idx >= 0) { 1679 info = &uadev[pcm_card_num].info[info_idx]; 1680 uaudio_dev_intf_cleanup(uadev[pcm_card_num].udev, 1681 info); 1682 } 1683 if (atomic_read(&uadev[pcm_card_num].in_use)) 1684 kref_put(&uadev[pcm_card_num].kref, 1685 uaudio_dev_release); 1686 } 1687 mutex_unlock(&qdev_mutex); 1688 1689 resp.usb_token = req_msg->usb_token; 1690 resp.usb_token_valid = 1; 1691 resp.internal_status = ret; 1692 resp.internal_status_valid = 1; 1693 resp.status = ret ? USB_QMI_STREAM_REQ_FAILURE_V01 : ret; 1694 resp.status_valid = 1; 1695 ret = qmi_send_response(svc->uaudio_svc_hdl, sq, txn, 1696 QMI_UAUDIO_STREAM_RESP_V01, 1697 QMI_UAUDIO_STREAM_RESP_MSG_V01_MAX_MSG_LEN, 1698 qmi_uaudio_stream_resp_msg_v01_ei, &resp); 1699 } 1700 1701 static struct qmi_msg_handler uaudio_stream_req_handlers = { 1702 .type = QMI_REQUEST, 1703 .msg_id = QMI_UAUDIO_STREAM_REQ_V01, 1704 .ei = qmi_uaudio_stream_req_msg_v01_ei, 1705 .decoded_size = QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1706 .fn = handle_uaudio_stream_req, 1707 }; 1708 1709 /** 1710 * qc_usb_audio_offload_init_qmi_dev() - initializes qmi dev 1711 * 1712 * Initializes the USB qdev, which is used to carry information pertaining to 1713 * the offloading resources. This device is freed only when there are no longer 1714 * any offloading candidates. (i.e, when all audio devices are disconnected) 1715 * 1716 */ 1717 static int qc_usb_audio_offload_init_qmi_dev(void) 1718 { 1719 uaudio_qdev = kzalloc_obj(*uaudio_qdev); 1720 if (!uaudio_qdev) 1721 return -ENOMEM; 1722 1723 /* initialize xfer ring and xfer buf iova list */ 1724 INIT_LIST_HEAD(&uaudio_qdev->xfer_ring_list); 1725 uaudio_qdev->curr_xfer_ring_iova = IOVA_XFER_RING_BASE; 1726 uaudio_qdev->xfer_ring_iova_size = 1727 IOVA_XFER_RING_MAX - IOVA_XFER_RING_BASE; 1728 1729 INIT_LIST_HEAD(&uaudio_qdev->xfer_buf_list); 1730 uaudio_qdev->curr_xfer_buf_iova = IOVA_XFER_BUF_BASE; 1731 uaudio_qdev->xfer_buf_iova_size = 1732 IOVA_XFER_BUF_MAX - IOVA_XFER_BUF_BASE; 1733 1734 return 0; 1735 } 1736 1737 /* Populates ppcm_idx array with supported PCM indexes */ 1738 static int qc_usb_audio_offload_fill_avail_pcms(struct snd_usb_audio *chip, 1739 struct snd_soc_usb_device *sdev) 1740 { 1741 struct snd_usb_stream *as; 1742 struct snd_usb_substream *subs; 1743 int idx = 0; 1744 1745 list_for_each_entry(as, &chip->pcm_list, list) { 1746 subs = &as->substream[SNDRV_PCM_STREAM_PLAYBACK]; 1747 if (subs->ep_num) { 1748 sdev->ppcm_idx[idx] = as->pcm->device; 1749 idx++; 1750 } 1751 /* 1752 * Break if the current index exceeds the number of possible 1753 * playback streams counted from the UAC descriptors. 1754 */ 1755 if (idx >= sdev->num_playback) 1756 break; 1757 } 1758 1759 return idx; 1760 } 1761 1762 /** 1763 * qc_usb_audio_offload_probe() - platform op connect handler 1764 * @chip: USB SND device 1765 * 1766 * Platform connect handler when a USB SND device is detected. Will 1767 * notify SOC USB about the connection to enable the USB ASoC backend 1768 * and populate internal USB chip array. 1769 * 1770 */ 1771 static void qc_usb_audio_offload_probe(struct snd_usb_audio *chip) 1772 { 1773 struct usb_interface *intf = chip->intf[chip->num_interfaces - 1]; 1774 struct usb_interface_descriptor *altsd; 1775 struct usb_host_interface *alts; 1776 struct snd_soc_usb_device *sdev; 1777 struct xhci_sideband *sb; 1778 1779 /* 1780 * If there is no priv_data, or no playback paths, the connected 1781 * device doesn't support offloading. Avoid populating entries for 1782 * this device. 1783 */ 1784 if (!snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent) || 1785 !usb_qmi_get_pcm_num(chip, 0)) 1786 return; 1787 1788 guard(mutex)(&qdev_mutex); 1789 guard(mutex)(&chip->mutex); 1790 if (!uadev[chip->card->number].chip) { 1791 sdev = kzalloc_obj(*sdev); 1792 if (!sdev) 1793 return; 1794 1795 sb = xhci_sideband_register(intf, XHCI_SIDEBAND_VENDOR, 1796 uaudio_sideband_notifier); 1797 if (!sb) 1798 goto free_sdev; 1799 } else { 1800 sb = uadev[chip->card->number].sb; 1801 sdev = uadev[chip->card->number].sdev; 1802 } 1803 1804 uadev[chip->card->number].sb = sb; 1805 uadev[chip->card->number].chip = chip; 1806 uadev[chip->card->number].sdev = sdev; 1807 1808 alts = &intf->altsetting[0]; 1809 altsd = get_iface_desc(alts); 1810 1811 /* Wait until all PCM devices are populated before notifying soc-usb */ 1812 if (altsd->bInterfaceNumber == chip->last_iface) { 1813 sdev->num_playback = usb_qmi_get_pcm_num(chip, 0); 1814 1815 /* 1816 * Allocate playback pcm index array based on number of possible 1817 * playback paths within the UAC descriptors. 1818 */ 1819 sdev->ppcm_idx = kcalloc(sdev->num_playback, sizeof(unsigned int), 1820 GFP_KERNEL); 1821 if (!sdev->ppcm_idx) 1822 goto unreg_xhci; 1823 1824 qc_usb_audio_offload_fill_avail_pcms(chip, sdev); 1825 sdev->card_idx = chip->card->number; 1826 sdev->chip_idx = chip->index; 1827 1828 snd_usb_offload_create_ctl(chip, uaudio_qdev->auxdev->dev.parent); 1829 snd_soc_usb_connect(uaudio_qdev->auxdev->dev.parent, sdev); 1830 } 1831 1832 return; 1833 1834 unreg_xhci: 1835 xhci_sideband_unregister(sb); 1836 uadev[chip->card->number].sb = NULL; 1837 free_sdev: 1838 kfree(sdev); 1839 uadev[chip->card->number].sdev = NULL; 1840 uadev[chip->card->number].chip = NULL; 1841 } 1842 1843 /** 1844 * qc_usb_audio_cleanup_qmi_dev() - release qmi device 1845 * 1846 * Frees the USB qdev. Only occurs when there are no longer any potential 1847 * devices that can utilize USB audio offloading. 1848 * 1849 */ 1850 static void qc_usb_audio_cleanup_qmi_dev(void) 1851 { 1852 kfree(uaudio_qdev); 1853 uaudio_qdev = NULL; 1854 } 1855 1856 /** 1857 * qc_usb_audio_offload_disconnect() - platform op disconnect handler 1858 * @chip: USB SND device 1859 * 1860 * Platform disconnect handler. Will ensure that any pending stream is 1861 * halted by issuing a QMI disconnect indication packet to the adsp. 1862 * 1863 */ 1864 static void qc_usb_audio_offload_disconnect(struct snd_usb_audio *chip) 1865 { 1866 struct uaudio_dev *dev; 1867 int card_num; 1868 1869 if (!chip) 1870 return; 1871 1872 card_num = chip->card->number; 1873 if (card_num >= SNDRV_CARDS) 1874 return; 1875 1876 guard(mutex)(&qdev_mutex); 1877 guard(mutex)(&chip->mutex); 1878 dev = &uadev[card_num]; 1879 1880 /* Device has already been cleaned up, or never populated */ 1881 if (!dev->chip) 1882 return; 1883 1884 /* cleaned up already */ 1885 if (!dev->udev) 1886 goto done; 1887 1888 uaudio_send_disconnect_ind(chip); 1889 uaudio_dev_cleanup(dev); 1890 done: 1891 /* 1892 * If num_interfaces == 1, the last USB SND interface is being removed. 1893 * This is to accommodate for devices w/ multiple UAC functions. 1894 */ 1895 if (chip->num_interfaces == 1) { 1896 snd_soc_usb_disconnect(uaudio_qdev->auxdev->dev.parent, dev->sdev); 1897 xhci_sideband_unregister(dev->sb); 1898 dev->chip = NULL; 1899 kfree(dev->sdev->ppcm_idx); 1900 kfree(dev->sdev); 1901 dev->sdev = NULL; 1902 } 1903 } 1904 1905 /** 1906 * qc_usb_audio_offload_suspend() - USB offload PM suspend handler 1907 * @intf: USB interface 1908 * @message: suspend type 1909 * 1910 * PM suspend handler to ensure that the USB offloading driver is able to stop 1911 * any pending traffic, so that the bus can be suspended. 1912 * 1913 */ 1914 static void qc_usb_audio_offload_suspend(struct usb_interface *intf, 1915 pm_message_t message) 1916 { 1917 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1918 int card_num; 1919 1920 if (!chip) 1921 return; 1922 1923 card_num = chip->card->number; 1924 if (card_num >= SNDRV_CARDS) 1925 return; 1926 1927 guard(mutex)(&qdev_mutex); 1928 guard(mutex)(&chip->mutex); 1929 1930 uaudio_send_disconnect_ind(chip); 1931 } 1932 1933 static struct snd_usb_platform_ops offload_ops = { 1934 .connect_cb = qc_usb_audio_offload_probe, 1935 .disconnect_cb = qc_usb_audio_offload_disconnect, 1936 .suspend_cb = qc_usb_audio_offload_suspend, 1937 }; 1938 1939 static int qc_usb_audio_probe(struct auxiliary_device *auxdev, 1940 const struct auxiliary_device_id *id) 1941 1942 { 1943 struct uaudio_qmi_svc *svc; 1944 int ret; 1945 1946 svc = kzalloc_obj(*svc); 1947 if (!svc) 1948 return -ENOMEM; 1949 1950 svc->uaudio_svc_hdl = kzalloc_obj(*svc->uaudio_svc_hdl); 1951 if (!svc->uaudio_svc_hdl) { 1952 ret = -ENOMEM; 1953 goto free_svc; 1954 } 1955 1956 ret = qmi_handle_init(svc->uaudio_svc_hdl, 1957 QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1958 &uaudio_svc_ops_options, 1959 &uaudio_stream_req_handlers); 1960 ret = qmi_add_server(svc->uaudio_svc_hdl, UAUDIO_STREAM_SERVICE_ID_V01, 1961 UAUDIO_STREAM_SERVICE_VERS_V01, 0); 1962 1963 uaudio_svc = svc; 1964 1965 qc_usb_audio_offload_init_qmi_dev(); 1966 uaudio_qdev->auxdev = auxdev; 1967 1968 ret = snd_usb_register_platform_ops(&offload_ops); 1969 if (ret < 0) 1970 goto release_qmi; 1971 1972 snd_usb_rediscover_devices(); 1973 1974 return 0; 1975 1976 release_qmi: 1977 qc_usb_audio_cleanup_qmi_dev(); 1978 qmi_handle_release(svc->uaudio_svc_hdl); 1979 free_svc: 1980 kfree(svc); 1981 1982 return ret; 1983 } 1984 1985 static void qc_usb_audio_remove(struct auxiliary_device *auxdev) 1986 { 1987 struct uaudio_qmi_svc *svc = uaudio_svc; 1988 int idx; 1989 1990 /* 1991 * Remove all connected devices after unregistering ops, to ensure 1992 * that no further connect events will occur. The disconnect routine 1993 * will issue the QMI disconnect indication, which results in the 1994 * external DSP to stop issuing transfers. 1995 */ 1996 snd_usb_unregister_platform_ops(); 1997 for (idx = 0; idx < SNDRV_CARDS; idx++) 1998 qc_usb_audio_offload_disconnect(uadev[idx].chip); 1999 2000 qc_usb_audio_cleanup_qmi_dev(); 2001 2002 qmi_handle_release(svc->uaudio_svc_hdl); 2003 kfree(svc); 2004 uaudio_svc = NULL; 2005 } 2006 2007 static const struct auxiliary_device_id qc_usb_audio_table[] = { 2008 { .name = "q6usb.qc-usb-audio-offload" }, 2009 {}, 2010 }; 2011 MODULE_DEVICE_TABLE(auxiliary, qc_usb_audio_table); 2012 2013 static struct auxiliary_driver qc_usb_audio_offload_drv = { 2014 .name = "qc-usb-audio-offload", 2015 .id_table = qc_usb_audio_table, 2016 .probe = qc_usb_audio_probe, 2017 .remove = qc_usb_audio_remove, 2018 }; 2019 module_auxiliary_driver(qc_usb_audio_offload_drv); 2020 2021 MODULE_DESCRIPTION("QC USB Audio Offloading"); 2022 MODULE_LICENSE("GPL"); 2023