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); 568 569 switch (mtype) { 570 case MEM_EVENT_RING: 571 iova = IOVA_BASE; 572 /* er already mapped */ 573 if (uaudio_qdev->er_mapped) 574 map = false; 575 break; 576 case MEM_XFER_RING: 577 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_ring_iova, 578 &uaudio_qdev->xfer_ring_iova_size, 579 &uaudio_qdev->xfer_ring_list, size); 580 break; 581 default: 582 dev_err(uaudio_qdev->data->dev, "unknown mem type %d\n", mtype); 583 } 584 585 if (!iova || !map) 586 return 0; 587 588 iommu_map(uaudio_qdev->data->domain, iova, pa, size, prot, GFP_KERNEL); 589 590 return iova; 591 } 592 593 static unsigned long uaudio_iommu_map_xfer_buf(bool dma_coherent, size_t size, 594 struct sg_table *sgt) 595 { 596 struct scatterlist *sg; 597 unsigned long iova = 0; 598 size_t total_len = 0; 599 unsigned long iova_sg; 600 phys_addr_t pa_sg; 601 size_t sg_len; 602 int prot = uaudio_iommu_map_prot(dma_coherent); 603 int ret; 604 int i; 605 606 prot = IOMMU_READ | IOMMU_WRITE; 607 608 if (dma_coherent) 609 prot |= IOMMU_CACHE; 610 611 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_buf_iova, 612 &uaudio_qdev->xfer_buf_iova_size, 613 &uaudio_qdev->xfer_buf_list, size); 614 if (!iova) 615 goto done; 616 617 iova_sg = iova; 618 for_each_sg(sgt->sgl, sg, sgt->nents, i) { 619 sg_len = PAGE_ALIGN(sg->offset + sg->length); 620 pa_sg = page_to_phys(sg_page(sg)); 621 ret = iommu_map(uaudio_qdev->data->domain, iova_sg, pa_sg, sg_len, 622 prot, GFP_KERNEL); 623 if (ret) { 624 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 625 iova = 0; 626 goto done; 627 } 628 629 iova_sg += sg_len; 630 total_len += sg_len; 631 } 632 633 if (size != total_len) { 634 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 635 iova = 0; 636 } 637 done: 638 return iova; 639 } 640 641 /* looks up alias, if any, for controller DT node and returns the index */ 642 static int usb_get_controller_id(struct usb_device *udev) 643 { 644 if (udev->bus->sysdev && udev->bus->sysdev->of_node) 645 return of_alias_get_id(udev->bus->sysdev->of_node, "usb"); 646 647 return -ENODEV; 648 } 649 650 /** 651 * uaudio_dev_intf_cleanup() - cleanup transfer resources 652 * @udev: usb device 653 * @info: usb offloading interface 654 * 655 * Cleans up the transfer ring related resources which are assigned per 656 * endpoint from XHCI. This is invoked when the USB endpoints are no 657 * longer in use by the adsp. 658 * 659 */ 660 static void uaudio_dev_intf_cleanup(struct usb_device *udev, struct intf_info *info) 661 { 662 uaudio_iommu_unmap(MEM_XFER_RING, info->data_xfer_ring_va, 663 info->data_xfer_ring_size, info->data_xfer_ring_size); 664 info->data_xfer_ring_va = 0; 665 info->data_xfer_ring_size = 0; 666 667 uaudio_iommu_unmap(MEM_XFER_RING, info->sync_xfer_ring_va, 668 info->sync_xfer_ring_size, info->sync_xfer_ring_size); 669 info->sync_xfer_ring_va = 0; 670 info->sync_xfer_ring_size = 0; 671 672 uaudio_iommu_unmap(MEM_XFER_BUF, info->xfer_buf_iova, info->xfer_buf_size, 673 info->xfer_buf_size); 674 info->xfer_buf_iova = 0; 675 676 usb_free_coherent(udev, info->xfer_buf_size, info->xfer_buf_cpu, 677 info->xfer_buf_dma); 678 info->xfer_buf_size = 0; 679 info->xfer_buf_cpu = NULL; 680 info->xfer_buf_dma = 0; 681 682 info->in_use = false; 683 } 684 685 /** 686 * uaudio_event_ring_cleanup_free() - cleanup secondary event ring 687 * @dev: usb offload device 688 * 689 * Cleans up the secondary event ring that was requested. This will 690 * occur when the adsp is no longer transferring data on the USB bus 691 * across all endpoints. 692 * 693 */ 694 static void uaudio_event_ring_cleanup_free(struct uaudio_dev *dev) 695 { 696 clear_bit(dev->chip->card->number, &uaudio_qdev->card_slot); 697 /* all audio devices are disconnected */ 698 if (!uaudio_qdev->card_slot) { 699 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, 700 PAGE_SIZE); 701 xhci_sideband_remove_interrupter(uadev[dev->chip->card->number].sb); 702 usb_offload_put(dev->udev); 703 } 704 } 705 706 static void uaudio_dev_cleanup(struct uaudio_dev *dev) 707 { 708 int if_idx; 709 710 if (!dev->udev) 711 return; 712 713 /* free xfer buffer and unmap xfer ring and buf per interface */ 714 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 715 if (!dev->info[if_idx].in_use) 716 continue; 717 uaudio_dev_intf_cleanup(dev->udev, &dev->info[if_idx]); 718 dev_dbg(uaudio_qdev->data->dev, 719 "release resources: intf# %d card# %d\n", 720 dev->info[if_idx].intf_num, dev->chip->card->number); 721 } 722 723 dev->num_intf = 0; 724 725 /* free interface info */ 726 kfree(dev->info); 727 dev->info = NULL; 728 uaudio_event_ring_cleanup_free(dev); 729 dev->udev = NULL; 730 } 731 732 /** 733 * disable_audio_stream() - disable usb snd endpoints 734 * @subs: usb substream 735 * 736 * Closes the USB SND endpoints associated with the current audio stream 737 * used. This will decrement the USB SND endpoint opened reference count. 738 * 739 */ 740 static void disable_audio_stream(struct snd_usb_substream *subs) 741 { 742 struct snd_usb_audio *chip = subs->stream->chip; 743 744 snd_usb_hw_free(subs); 745 snd_usb_autosuspend(chip); 746 } 747 748 /* QMI service disconnect handlers */ 749 static void qmi_stop_session(void) 750 { 751 struct snd_usb_substream *subs; 752 struct usb_host_endpoint *ep; 753 struct snd_usb_audio *chip; 754 struct intf_info *info; 755 int pcm_card_num; 756 int if_idx; 757 int idx; 758 759 guard(mutex)(&qdev_mutex); 760 /* find all active intf for set alt 0 and cleanup usb audio dev */ 761 for (idx = 0; idx < SNDRV_CARDS; idx++) { 762 if (!atomic_read(&uadev[idx].in_use)) 763 continue; 764 765 chip = uadev[idx].chip; 766 for (if_idx = 0; if_idx < uadev[idx].num_intf; if_idx++) { 767 if (!uadev[idx].info || !uadev[idx].info[if_idx].in_use) 768 continue; 769 info = &uadev[idx].info[if_idx]; 770 pcm_card_num = info->pcm_card_num; 771 subs = find_substream(pcm_card_num, info->pcm_dev_num, 772 info->direction); 773 if (!subs || !chip || atomic_read(&chip->shutdown)) { 774 dev_err(&uadev[idx].udev->dev, 775 "no sub for c#%u dev#%u dir%u\n", 776 info->pcm_card_num, 777 info->pcm_dev_num, 778 info->direction); 779 continue; 780 } 781 /* Release XHCI endpoints */ 782 if (info->data_ep_pipe) 783 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 784 info->data_ep_pipe); 785 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, ep); 786 787 if (info->sync_ep_pipe) 788 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 789 info->sync_ep_pipe); 790 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, ep); 791 792 disable_audio_stream(subs); 793 } 794 atomic_set(&uadev[idx].in_use, 0); 795 guard(mutex)(&chip->mutex); 796 uaudio_dev_cleanup(&uadev[idx]); 797 } 798 } 799 800 /** 801 * uaudio_sideband_notifier() - xHCI sideband event handler 802 * @intf: USB interface handle 803 * @evt: xHCI sideband event type 804 * 805 * This callback is executed when the xHCI sideband encounters a sequence 806 * that requires the sideband clients to take action. An example, is when 807 * xHCI frees the transfer ring, so the client has to ensure that the 808 * offload path is halted. 809 * 810 */ 811 static int uaudio_sideband_notifier(struct usb_interface *intf, 812 struct xhci_sideband_event *evt) 813 { 814 struct snd_usb_audio *chip; 815 struct uaudio_dev *dev; 816 int if_idx; 817 818 if (!intf || !evt) 819 return 0; 820 821 chip = usb_get_intfdata(intf); 822 823 guard(mutex)(&qdev_mutex); 824 guard(mutex)(&chip->mutex); 825 826 dev = &uadev[chip->card->number]; 827 828 if (evt->type == XHCI_SIDEBAND_XFER_RING_FREE) { 829 unsigned int *ep = (unsigned int *) evt->evt_data; 830 831 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 832 if (dev->info[if_idx].data_ep_idx == *ep || 833 dev->info[if_idx].sync_ep_idx == *ep) 834 uaudio_send_disconnect_ind(chip); 835 } 836 } 837 838 return 0; 839 } 840 841 /** 842 * qmi_bye_cb() - qmi bye message callback 843 * @handle: QMI handle 844 * @node: id of the dying node 845 * 846 * This callback is invoked when the QMI bye control message is received 847 * from the QMI client. Handle the message accordingly by ensuring that 848 * the USB offload path is disabled and cleaned up. At this point, ADSP 849 * is not utilizing the USB bus. 850 * 851 */ 852 static void qmi_bye_cb(struct qmi_handle *handle, unsigned int node) 853 { 854 struct uaudio_qmi_svc *svc = uaudio_svc; 855 856 if (svc->uaudio_svc_hdl != handle) 857 return; 858 859 if (svc->client_connected && svc->client_sq.sq_node == node) { 860 qmi_stop_session(); 861 862 /* clear QMI client parameters to block further QMI messages */ 863 svc->client_sq.sq_node = 0; 864 svc->client_sq.sq_port = 0; 865 svc->client_sq.sq_family = 0; 866 svc->client_connected = false; 867 } 868 } 869 870 /** 871 * qmi_svc_disconnect_cb() - qmi client disconnected 872 * @handle: QMI handle 873 * @node: id of the dying node 874 * @port: port of the dying client 875 * 876 * Invoked when the remote QMI client is disconnected. Handle this event 877 * the same way as when the QMI bye message is received. This will ensure 878 * the USB offloading path is disabled and cleaned up. 879 * 880 */ 881 static void qmi_svc_disconnect_cb(struct qmi_handle *handle, 882 unsigned int node, unsigned int port) 883 { 884 struct uaudio_qmi_svc *svc; 885 886 if (!uaudio_svc) 887 return; 888 889 svc = uaudio_svc; 890 if (svc->uaudio_svc_hdl != handle) 891 return; 892 893 if (svc->client_connected && svc->client_sq.sq_node == node && 894 svc->client_sq.sq_port == port) { 895 qmi_stop_session(); 896 897 /* clear QMI client parameters to block further QMI messages */ 898 svc->client_sq.sq_node = 0; 899 svc->client_sq.sq_port = 0; 900 svc->client_sq.sq_family = 0; 901 svc->client_connected = false; 902 } 903 } 904 905 /* QMI client callback handlers from QMI interface */ 906 static struct qmi_ops uaudio_svc_ops_options = { 907 .bye = qmi_bye_cb, 908 .del_client = qmi_svc_disconnect_cb, 909 }; 910 911 /* kref release callback when all streams are disabled */ 912 static void uaudio_dev_release(struct kref *kref) 913 { 914 struct uaudio_dev *dev = container_of(kref, struct uaudio_dev, kref); 915 916 uaudio_event_ring_cleanup_free(dev); 917 atomic_set(&dev->in_use, 0); 918 wake_up(&dev->disconnect_wq); 919 } 920 921 /** 922 * enable_audio_stream() - enable usb snd endpoints 923 * @subs: usb substream 924 * @pcm_format: pcm format requested 925 * @channels: number of channels 926 * @cur_rate: sample rate 927 * @datainterval: interval 928 * 929 * Opens all USB SND endpoints used for the data interface. This will increment 930 * the USB SND endpoint's opened count. Requests to keep the interface resumed 931 * until the audio stream is stopped. Will issue the USB set interface control 932 * message to enable the data interface. 933 * 934 */ 935 static int enable_audio_stream(struct snd_usb_substream *subs, 936 snd_pcm_format_t pcm_format, 937 unsigned int channels, unsigned int cur_rate, 938 int datainterval) 939 { 940 struct snd_pcm_hw_params params; 941 struct snd_usb_audio *chip; 942 struct snd_interval *i; 943 struct snd_mask *m; 944 int ret; 945 946 chip = subs->stream->chip; 947 948 _snd_pcm_hw_params_any(¶ms); 949 950 m = hw_param_mask(¶ms, SNDRV_PCM_HW_PARAM_FORMAT); 951 snd_mask_leave(m, pcm_format); 952 953 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_CHANNELS); 954 snd_interval_setinteger(i); 955 i->min = channels; 956 i->max = channels; 957 958 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_RATE); 959 snd_interval_setinteger(i); 960 i->min = cur_rate; 961 i->max = cur_rate; 962 963 pm_runtime_barrier(&chip->intf[0]->dev); 964 snd_usb_autoresume(chip); 965 966 ret = snd_usb_hw_params(subs, ¶ms); 967 if (ret < 0) 968 goto put_suspend; 969 970 if (!atomic_read(&chip->shutdown)) { 971 CLASS(snd_usb_lock, pm)(chip); 972 if (pm.err < 0) { 973 ret = pm.err; 974 goto detach_ep; 975 } 976 977 if (subs->sync_endpoint) { 978 ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); 979 if (ret < 0) 980 goto detach_ep; 981 } 982 983 ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); 984 if (ret < 0) 985 goto detach_ep; 986 987 dev_dbg(uaudio_qdev->data->dev, 988 "selected %s iface:%d altsetting:%d datainterval:%dus\n", 989 subs->direction ? "capture" : "playback", 990 subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting, 991 (1 << subs->cur_audiofmt->datainterval) * 992 (subs->dev->speed >= USB_SPEED_HIGH ? 993 BUS_INTERVAL_HIGHSPEED_AND_ABOVE : 994 BUS_INTERVAL_FULL_SPEED)); 995 } 996 997 return 0; 998 999 detach_ep: 1000 snd_usb_hw_free(subs); 1001 1002 put_suspend: 1003 snd_usb_autosuspend(chip); 1004 1005 return ret; 1006 } 1007 1008 /** 1009 * uaudio_transfer_buffer_setup() - fetch and populate xfer buffer params 1010 * @subs: usb substream 1011 * @xfer_buf_cpu: xfer buf to be allocated 1012 * @xfer_buf_len: size of allocation 1013 * @mem_info: QMI response info 1014 * 1015 * Allocates and maps the transfer buffers that will be utilized by the 1016 * audio DSP. Will populate the information in the QMI response that is 1017 * sent back to the stream enable request. 1018 * 1019 */ 1020 static int uaudio_transfer_buffer_setup(struct snd_usb_substream *subs, 1021 void **xfer_buf_cpu, u32 xfer_buf_len, 1022 struct mem_info_v01 *mem_info) 1023 { 1024 struct sg_table xfer_buf_sgt; 1025 dma_addr_t xfer_buf_dma; 1026 void *xfer_buf; 1027 u32 len = xfer_buf_len; 1028 bool dma_coherent; 1029 dma_addr_t xfer_buf_dma_sysdev; 1030 u32 remainder; 1031 u32 mult; 1032 int ret; 1033 1034 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1035 1036 /* xfer buffer, multiple of 4K only */ 1037 if (!len) 1038 len = PAGE_SIZE; 1039 1040 mult = len / PAGE_SIZE; 1041 remainder = len % PAGE_SIZE; 1042 len = mult * PAGE_SIZE; 1043 len += remainder ? PAGE_SIZE : 0; 1044 1045 if (len > MAX_XFER_BUFF_LEN) { 1046 dev_err(uaudio_qdev->data->dev, 1047 "req buf len %d > max buf len %lu, setting %lu\n", 1048 len, MAX_XFER_BUFF_LEN, MAX_XFER_BUFF_LEN); 1049 len = MAX_XFER_BUFF_LEN; 1050 } 1051 1052 /* get buffer mapped into subs->dev */ 1053 xfer_buf = usb_alloc_coherent(subs->dev, len, GFP_KERNEL, &xfer_buf_dma); 1054 if (!xfer_buf) 1055 return -ENOMEM; 1056 1057 dma_get_sgtable(subs->dev->bus->sysdev, &xfer_buf_sgt, xfer_buf, 1058 xfer_buf_dma, len); 1059 1060 /* map the physical buffer into sysdev as well */ 1061 xfer_buf_dma_sysdev = uaudio_iommu_map_xfer_buf(dma_coherent, 1062 len, &xfer_buf_sgt); 1063 if (!xfer_buf_dma_sysdev) { 1064 ret = -ENOMEM; 1065 goto unmap_sync; 1066 } 1067 1068 mem_info->dma = xfer_buf_dma; 1069 mem_info->size = len; 1070 mem_info->iova = PREPEND_SID_TO_IOVA(xfer_buf_dma_sysdev, uaudio_qdev->data->sid); 1071 *xfer_buf_cpu = xfer_buf; 1072 sg_free_table(&xfer_buf_sgt); 1073 1074 return 0; 1075 1076 unmap_sync: 1077 usb_free_coherent(subs->dev, len, xfer_buf, xfer_buf_dma); 1078 1079 return ret; 1080 } 1081 1082 /** 1083 * uaudio_endpoint_setup() - fetch and populate endpoint params 1084 * @subs: usb substream 1085 * @endpoint: usb endpoint to add 1086 * @card_num: uadev index 1087 * @mem_info: QMI response info 1088 * @ep_desc: QMI ep desc response field 1089 * 1090 * Initialize the USB endpoint being used for a particular USB 1091 * stream. Will request XHCI sec intr to reserve the EP for 1092 * offloading as well as populating the QMI response with the 1093 * transfer ring parameters. 1094 * 1095 */ 1096 static phys_addr_t 1097 uaudio_endpoint_setup(struct snd_usb_substream *subs, 1098 struct snd_usb_endpoint *endpoint, int card_num, 1099 struct mem_info_v01 *mem_info, 1100 struct usb_endpoint_descriptor_v01 *ep_desc) 1101 { 1102 struct usb_host_endpoint *ep; 1103 phys_addr_t tr_pa = 0; 1104 struct sg_table *sgt; 1105 bool dma_coherent; 1106 unsigned long iova; 1107 struct page *pg; 1108 int ret = -ENODEV; 1109 1110 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1111 1112 ep = usb_pipe_endpoint(subs->dev, endpoint->pipe); 1113 if (!ep) { 1114 dev_err(uaudio_qdev->data->dev, "data ep # %d context is null\n", 1115 subs->data_endpoint->ep_num); 1116 goto exit; 1117 } 1118 1119 memcpy(ep_desc, &ep->desc, sizeof(ep->desc)); 1120 1121 ret = xhci_sideband_add_endpoint(uadev[card_num].sb, ep); 1122 if (ret < 0) { 1123 dev_err(&subs->dev->dev, 1124 "failed to add data ep to sec intr\n"); 1125 ret = -ENODEV; 1126 goto exit; 1127 } 1128 1129 sgt = xhci_sideband_get_endpoint_buffer(uadev[card_num].sb, ep); 1130 if (!sgt) { 1131 dev_err(&subs->dev->dev, 1132 "failed to get data ep ring address\n"); 1133 ret = -ENODEV; 1134 goto remove_ep; 1135 } 1136 1137 pg = sg_page(sgt->sgl); 1138 tr_pa = page_to_phys(pg); 1139 mem_info->dma = sg_dma_address(sgt->sgl); 1140 sg_free_table(sgt); 1141 1142 /* data transfer ring */ 1143 iova = uaudio_iommu_map_pa(MEM_XFER_RING, dma_coherent, tr_pa, 1144 PAGE_SIZE); 1145 if (!iova) { 1146 ret = -ENOMEM; 1147 goto clear_pa; 1148 } 1149 1150 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1151 mem_info->size = PAGE_SIZE; 1152 1153 return 0; 1154 1155 clear_pa: 1156 mem_info->dma = 0; 1157 remove_ep: 1158 xhci_sideband_remove_endpoint(uadev[card_num].sb, ep); 1159 exit: 1160 return ret; 1161 } 1162 1163 /** 1164 * uaudio_event_ring_setup() - fetch and populate event ring params 1165 * @subs: usb substream 1166 * @card_num: uadev index 1167 * @mem_info: QMI response info 1168 * 1169 * Register secondary interrupter to XHCI and fetch the event buffer info 1170 * and populate the information into the QMI response. 1171 * 1172 */ 1173 static int uaudio_event_ring_setup(struct snd_usb_substream *subs, 1174 int card_num, struct mem_info_v01 *mem_info) 1175 { 1176 struct sg_table *sgt; 1177 phys_addr_t er_pa; 1178 bool dma_coherent; 1179 unsigned long iova; 1180 struct page *pg; 1181 int ret; 1182 1183 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1184 er_pa = 0; 1185 1186 ret = usb_offload_get(subs->dev); 1187 if (ret < 0) 1188 goto exit; 1189 1190 /* event ring */ 1191 ret = xhci_sideband_create_interrupter(uadev[card_num].sb, 1, false, 1192 0, uaudio_qdev->data->intr_num); 1193 if (ret < 0) { 1194 dev_err(&subs->dev->dev, "failed to fetch interrupter\n"); 1195 goto put_offload; 1196 } 1197 1198 sgt = xhci_sideband_get_event_buffer(uadev[card_num].sb); 1199 if (!sgt) { 1200 dev_err(&subs->dev->dev, 1201 "failed to get event ring address\n"); 1202 ret = -ENODEV; 1203 goto remove_interrupter; 1204 } 1205 1206 pg = sg_page(sgt->sgl); 1207 er_pa = page_to_phys(pg); 1208 mem_info->dma = sg_dma_address(sgt->sgl); 1209 sg_free_table(sgt); 1210 1211 iova = uaudio_iommu_map_pa(MEM_EVENT_RING, dma_coherent, er_pa, 1212 PAGE_SIZE); 1213 if (!iova) { 1214 ret = -ENOMEM; 1215 goto clear_pa; 1216 } 1217 1218 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1219 mem_info->size = PAGE_SIZE; 1220 1221 return 0; 1222 1223 clear_pa: 1224 mem_info->dma = 0; 1225 remove_interrupter: 1226 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1227 put_offload: 1228 usb_offload_put(subs->dev); 1229 exit: 1230 return ret; 1231 } 1232 1233 /** 1234 * uaudio_populate_uac_desc() - parse UAC parameters and populate QMI resp 1235 * @subs: usb substream 1236 * @resp: QMI response buffer 1237 * 1238 * Parses information specified within UAC descriptors which explain the 1239 * sample parameters that the device expects. This information is populated 1240 * to the QMI response sent back to the audio DSP. 1241 * 1242 */ 1243 static int uaudio_populate_uac_desc(struct snd_usb_substream *subs, 1244 struct qmi_uaudio_stream_resp_msg_v01 *resp) 1245 { 1246 struct usb_interface_descriptor *altsd; 1247 struct usb_host_interface *alts; 1248 struct usb_interface *iface; 1249 int protocol; 1250 1251 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface); 1252 if (!iface) { 1253 dev_err(&subs->dev->dev, "interface # %d does not exist\n", 1254 subs->cur_audiofmt->iface); 1255 return -ENODEV; 1256 } 1257 1258 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx]; 1259 altsd = get_iface_desc(alts); 1260 protocol = altsd->bInterfaceProtocol; 1261 1262 if (protocol == UAC_VERSION_1) { 1263 struct uac1_as_header_descriptor *as; 1264 1265 as = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, 1266 UAC_AS_GENERAL); 1267 if (!as) { 1268 dev_err(&subs->dev->dev, 1269 "%u:%d : no UAC_AS_GENERAL desc\n", 1270 subs->cur_audiofmt->iface, 1271 subs->cur_audiofmt->altset_idx); 1272 return -ENODEV; 1273 } 1274 1275 resp->data_path_delay = as->bDelay; 1276 resp->data_path_delay_valid = 1; 1277 1278 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1279 resp->usb_audio_subslot_size_valid = 1; 1280 1281 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0100); 1282 resp->usb_audio_spec_revision_valid = 1; 1283 } else if (protocol == UAC_VERSION_2) { 1284 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1285 resp->usb_audio_subslot_size_valid = 1; 1286 1287 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0200); 1288 resp->usb_audio_spec_revision_valid = 1; 1289 } else if (protocol == UAC_VERSION_3) { 1290 if (iface->intf_assoc->bFunctionSubClass == 1291 UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0) { 1292 dev_err(&subs->dev->dev, 1293 "full adc is not supported\n"); 1294 return -EINVAL; 1295 } 1296 1297 switch (le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize)) { 1298 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: 1299 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: 1300 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: 1301 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: { 1302 resp->usb_audio_subslot_size = 0x2; 1303 break; 1304 } 1305 1306 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: 1307 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: 1308 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: 1309 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: { 1310 resp->usb_audio_subslot_size = 0x3; 1311 break; 1312 } 1313 1314 default: 1315 dev_err(&subs->dev->dev, 1316 "%d: %u: Invalid wMaxPacketSize\n", 1317 subs->cur_audiofmt->iface, 1318 subs->cur_audiofmt->altset_idx); 1319 return -EINVAL; 1320 } 1321 resp->usb_audio_subslot_size_valid = 1; 1322 } else { 1323 dev_err(&subs->dev->dev, "unknown protocol version %x\n", 1324 protocol); 1325 return -ENODEV; 1326 } 1327 1328 memcpy(&resp->std_as_opr_intf_desc, &alts->desc, sizeof(alts->desc)); 1329 1330 return 0; 1331 } 1332 1333 /** 1334 * prepare_qmi_response() - prepare stream enable response 1335 * @subs: usb substream 1336 * @req_msg: QMI request message 1337 * @resp: QMI response buffer 1338 * @info_idx: usb interface array index 1339 * 1340 * Prepares the QMI response for a USB QMI stream enable request. Will parse 1341 * out the parameters within the stream enable request, in order to match 1342 * requested audio profile to the ones exposed by the USB device connected. 1343 * 1344 * In addition, will fetch the XHCI transfer resources needed for the handoff to 1345 * happen. This includes, transfer ring and buffer addresses and secondary event 1346 * ring address. These parameters will be communicated as part of the USB QMI 1347 * stream enable response. 1348 * 1349 */ 1350 static int prepare_qmi_response(struct snd_usb_substream *subs, 1351 struct qmi_uaudio_stream_req_msg_v01 *req_msg, 1352 struct qmi_uaudio_stream_resp_msg_v01 *resp, 1353 int info_idx) 1354 { 1355 struct q6usb_offload *data; 1356 int pcm_dev_num; 1357 int card_num; 1358 void *xfer_buf_cpu; 1359 int ret; 1360 1361 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1362 card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1363 1364 if (!uadev[card_num].ctrl_intf) { 1365 dev_err(&subs->dev->dev, "audio ctrl intf info not cached\n"); 1366 return -ENODEV; 1367 } 1368 1369 ret = uaudio_populate_uac_desc(subs, resp); 1370 if (ret < 0) 1371 return ret; 1372 1373 resp->slot_id = subs->dev->slot_id; 1374 resp->slot_id_valid = 1; 1375 1376 data = snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent); 1377 if (!data) { 1378 dev_err(&subs->dev->dev, "No private data found\n"); 1379 return -ENODEV; 1380 } 1381 1382 uaudio_qdev->data = data; 1383 1384 resp->std_as_opr_intf_desc_valid = 1; 1385 ret = uaudio_endpoint_setup(subs, subs->data_endpoint, card_num, 1386 &resp->xhci_mem_info.tr_data, 1387 &resp->std_as_data_ep_desc); 1388 if (ret < 0) 1389 return ret; 1390 1391 resp->std_as_data_ep_desc_valid = 1; 1392 1393 if (subs->sync_endpoint) { 1394 ret = uaudio_endpoint_setup(subs, subs->sync_endpoint, card_num, 1395 &resp->xhci_mem_info.tr_sync, 1396 &resp->std_as_sync_ep_desc); 1397 if (ret < 0) 1398 goto drop_data_ep; 1399 1400 resp->std_as_sync_ep_desc_valid = 1; 1401 } 1402 1403 resp->interrupter_num_valid = 1; 1404 resp->controller_num_valid = 0; 1405 ret = usb_get_controller_id(subs->dev); 1406 if (ret >= 0) { 1407 resp->controller_num = ret; 1408 resp->controller_num_valid = 1; 1409 } 1410 1411 /* event ring */ 1412 ret = uaudio_event_ring_setup(subs, card_num, 1413 &resp->xhci_mem_info.evt_ring); 1414 if (ret < 0) 1415 goto drop_sync_ep; 1416 1417 uaudio_qdev->er_mapped = true; 1418 resp->interrupter_num = xhci_sideband_interrupter_id(uadev[card_num].sb); 1419 1420 resp->speed_info = get_speed_info(subs->dev->speed); 1421 if (resp->speed_info == USB_QMI_DEVICE_SPEED_INVALID_V01) { 1422 ret = -ENODEV; 1423 goto free_sec_ring; 1424 } 1425 1426 resp->speed_info_valid = 1; 1427 1428 ret = uaudio_transfer_buffer_setup(subs, &xfer_buf_cpu, req_msg->xfer_buff_size, 1429 &resp->xhci_mem_info.xfer_buff); 1430 if (ret < 0) { 1431 ret = -ENOMEM; 1432 goto free_sec_ring; 1433 } 1434 1435 resp->xhci_mem_info_valid = 1; 1436 1437 if (!atomic_read(&uadev[card_num].in_use)) { 1438 kref_init(&uadev[card_num].kref); 1439 init_waitqueue_head(&uadev[card_num].disconnect_wq); 1440 uadev[card_num].num_intf = 1441 subs->dev->config->desc.bNumInterfaces; 1442 uadev[card_num].info = kzalloc_objs(struct intf_info, 1443 uadev[card_num].num_intf); 1444 if (!uadev[card_num].info) { 1445 ret = -ENOMEM; 1446 goto unmap_er; 1447 } 1448 uadev[card_num].udev = subs->dev; 1449 atomic_set(&uadev[card_num].in_use, 1); 1450 } else { 1451 kref_get(&uadev[card_num].kref); 1452 } 1453 1454 uadev[card_num].usb_core_id = resp->controller_num; 1455 1456 /* cache intf specific info to use it for unmap and free xfer buf */ 1457 uadev[card_num].info[info_idx].data_xfer_ring_va = 1458 IOVA_MASK(resp->xhci_mem_info.tr_data.iova); 1459 uadev[card_num].info[info_idx].data_xfer_ring_size = PAGE_SIZE; 1460 uadev[card_num].info[info_idx].sync_xfer_ring_va = 1461 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova); 1462 uadev[card_num].info[info_idx].sync_xfer_ring_size = PAGE_SIZE; 1463 uadev[card_num].info[info_idx].xfer_buf_iova = 1464 IOVA_MASK(resp->xhci_mem_info.xfer_buff.iova); 1465 uadev[card_num].info[info_idx].xfer_buf_dma = 1466 resp->xhci_mem_info.xfer_buff.dma; 1467 uadev[card_num].info[info_idx].xfer_buf_size = 1468 resp->xhci_mem_info.xfer_buff.size; 1469 uadev[card_num].info[info_idx].data_ep_pipe = subs->data_endpoint ? 1470 subs->data_endpoint->pipe : 0; 1471 uadev[card_num].info[info_idx].sync_ep_pipe = subs->sync_endpoint ? 1472 subs->sync_endpoint->pipe : 0; 1473 uadev[card_num].info[info_idx].data_ep_idx = subs->data_endpoint ? 1474 subs->data_endpoint->ep_num : 0; 1475 uadev[card_num].info[info_idx].sync_ep_idx = subs->sync_endpoint ? 1476 subs->sync_endpoint->ep_num : 0; 1477 uadev[card_num].info[info_idx].xfer_buf_cpu = xfer_buf_cpu; 1478 uadev[card_num].info[info_idx].pcm_card_num = card_num; 1479 uadev[card_num].info[info_idx].pcm_dev_num = pcm_dev_num; 1480 uadev[card_num].info[info_idx].direction = subs->direction; 1481 uadev[card_num].info[info_idx].intf_num = subs->cur_audiofmt->iface; 1482 uadev[card_num].info[info_idx].in_use = true; 1483 1484 set_bit(card_num, &uaudio_qdev->card_slot); 1485 1486 return 0; 1487 1488 unmap_er: 1489 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, PAGE_SIZE); 1490 free_sec_ring: 1491 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1492 usb_offload_put(subs->dev); 1493 drop_sync_ep: 1494 if (subs->sync_endpoint) { 1495 uaudio_iommu_unmap(MEM_XFER_RING, 1496 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova), 1497 PAGE_SIZE, PAGE_SIZE); 1498 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1499 usb_pipe_endpoint(subs->dev, subs->sync_endpoint->pipe)); 1500 } 1501 drop_data_ep: 1502 uaudio_iommu_unmap(MEM_XFER_RING, IOVA_MASK(resp->xhci_mem_info.tr_data.iova), 1503 PAGE_SIZE, PAGE_SIZE); 1504 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1505 usb_pipe_endpoint(subs->dev, subs->data_endpoint->pipe)); 1506 1507 return ret; 1508 } 1509 1510 /** 1511 * handle_uaudio_stream_req() - handle stream enable/disable request 1512 * @handle: QMI client handle 1513 * @sq: qrtr socket 1514 * @txn: QMI transaction context 1515 * @decoded_msg: decoded QMI message 1516 * 1517 * Main handler for the QMI stream enable/disable requests. This executes the 1518 * corresponding enable/disable stream apis, respectively. 1519 * 1520 */ 1521 static void handle_uaudio_stream_req(struct qmi_handle *handle, 1522 struct sockaddr_qrtr *sq, 1523 struct qmi_txn *txn, 1524 const void *decoded_msg) 1525 { 1526 struct qmi_uaudio_stream_req_msg_v01 *req_msg; 1527 struct qmi_uaudio_stream_resp_msg_v01 resp = {{0}, 0}; 1528 struct uaudio_qmi_svc *svc = uaudio_svc; 1529 struct snd_usb_audio *chip = NULL; 1530 struct snd_usb_substream *subs; 1531 struct usb_host_endpoint *ep; 1532 int datainterval = -EINVAL; 1533 int info_idx = -EINVAL; 1534 struct intf_info *info; 1535 u8 pcm_card_num; 1536 u8 pcm_dev_num; 1537 u8 direction; 1538 int ret = 0; 1539 1540 if (!svc->client_connected) { 1541 svc->client_sq = *sq; 1542 svc->client_connected = true; 1543 } 1544 1545 mutex_lock(&qdev_mutex); 1546 req_msg = (struct qmi_uaudio_stream_req_msg_v01 *)decoded_msg; 1547 if (!req_msg->audio_format_valid || !req_msg->bit_rate_valid || 1548 !req_msg->number_of_ch_valid || !req_msg->xfer_buff_size_valid) { 1549 ret = -EINVAL; 1550 goto response; 1551 } 1552 1553 if (!uaudio_qdev) { 1554 ret = -EINVAL; 1555 goto response; 1556 } 1557 1558 direction = (req_msg->usb_token & QMI_STREAM_REQ_DIRECTION); 1559 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1560 pcm_card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1561 if (pcm_card_num >= SNDRV_CARDS) { 1562 ret = -EINVAL; 1563 goto response; 1564 } 1565 1566 if (req_msg->audio_format > USB_QMI_PCM_FORMAT_U32_BE) { 1567 ret = -EINVAL; 1568 goto response; 1569 } 1570 1571 subs = find_substream(pcm_card_num, pcm_dev_num, direction); 1572 chip = uadev[pcm_card_num].chip; 1573 if (!subs || !chip || atomic_read(&chip->shutdown)) { 1574 ret = -ENODEV; 1575 goto response; 1576 } 1577 1578 info_idx = info_idx_from_ifnum(pcm_card_num, subs->cur_audiofmt ? 1579 subs->cur_audiofmt->iface : -1, req_msg->enable); 1580 if (atomic_read(&chip->shutdown) || !subs->stream || !subs->stream->pcm || 1581 !subs->stream->chip) { 1582 ret = -ENODEV; 1583 goto response; 1584 } 1585 1586 scoped_guard(mutex, &chip->mutex) { 1587 if (req_msg->enable) { 1588 if (info_idx < 0 || chip->system_suspend || subs->opened) { 1589 ret = -EBUSY; 1590 goto response; 1591 } 1592 subs->opened = 1; 1593 } 1594 } 1595 1596 if (req_msg->service_interval_valid) { 1597 ret = get_data_interval_from_si(subs, 1598 req_msg->service_interval); 1599 if (ret == -EINVAL) 1600 goto response; 1601 1602 datainterval = ret; 1603 } 1604 1605 uadev[pcm_card_num].ctrl_intf = chip->ctrl_intf; 1606 1607 if (req_msg->enable) { 1608 ret = enable_audio_stream(subs, 1609 map_pcm_format(req_msg->audio_format), 1610 req_msg->number_of_ch, req_msg->bit_rate, 1611 datainterval); 1612 1613 if (!ret) 1614 ret = prepare_qmi_response(subs, req_msg, &resp, 1615 info_idx); 1616 if (ret < 0) { 1617 guard(mutex)(&chip->mutex); 1618 subs->opened = 0; 1619 } 1620 } else { 1621 info = &uadev[pcm_card_num].info[info_idx]; 1622 if (info->data_ep_pipe) { 1623 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 1624 info->data_ep_pipe); 1625 if (ep) { 1626 xhci_sideband_stop_endpoint(uadev[pcm_card_num].sb, 1627 ep); 1628 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 1629 ep); 1630 } 1631 1632 info->data_ep_pipe = 0; 1633 } 1634 1635 if (info->sync_ep_pipe) { 1636 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 1637 info->sync_ep_pipe); 1638 if (ep) { 1639 xhci_sideband_stop_endpoint(uadev[pcm_card_num].sb, 1640 ep); 1641 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, 1642 ep); 1643 } 1644 1645 info->sync_ep_pipe = 0; 1646 } 1647 1648 disable_audio_stream(subs); 1649 guard(mutex)(&chip->mutex); 1650 subs->opened = 0; 1651 } 1652 1653 response: 1654 if (!req_msg->enable && ret != -EINVAL && ret != -ENODEV) { 1655 guard(mutex)(&chip->mutex); 1656 if (info_idx >= 0) { 1657 info = &uadev[pcm_card_num].info[info_idx]; 1658 uaudio_dev_intf_cleanup(uadev[pcm_card_num].udev, 1659 info); 1660 } 1661 if (atomic_read(&uadev[pcm_card_num].in_use)) 1662 kref_put(&uadev[pcm_card_num].kref, 1663 uaudio_dev_release); 1664 } 1665 mutex_unlock(&qdev_mutex); 1666 1667 resp.usb_token = req_msg->usb_token; 1668 resp.usb_token_valid = 1; 1669 resp.internal_status = ret; 1670 resp.internal_status_valid = 1; 1671 resp.status = ret ? USB_QMI_STREAM_REQ_FAILURE_V01 : ret; 1672 resp.status_valid = 1; 1673 ret = qmi_send_response(svc->uaudio_svc_hdl, sq, txn, 1674 QMI_UAUDIO_STREAM_RESP_V01, 1675 QMI_UAUDIO_STREAM_RESP_MSG_V01_MAX_MSG_LEN, 1676 qmi_uaudio_stream_resp_msg_v01_ei, &resp); 1677 } 1678 1679 static struct qmi_msg_handler uaudio_stream_req_handlers = { 1680 .type = QMI_REQUEST, 1681 .msg_id = QMI_UAUDIO_STREAM_REQ_V01, 1682 .ei = qmi_uaudio_stream_req_msg_v01_ei, 1683 .decoded_size = QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1684 .fn = handle_uaudio_stream_req, 1685 }; 1686 1687 /** 1688 * qc_usb_audio_offload_init_qmi_dev() - initializes qmi dev 1689 * 1690 * Initializes the USB qdev, which is used to carry information pertaining to 1691 * the offloading resources. This device is freed only when there are no longer 1692 * any offloading candidates. (i.e, when all audio devices are disconnected) 1693 * 1694 */ 1695 static int qc_usb_audio_offload_init_qmi_dev(void) 1696 { 1697 uaudio_qdev = kzalloc_obj(*uaudio_qdev); 1698 if (!uaudio_qdev) 1699 return -ENOMEM; 1700 1701 /* initialize xfer ring and xfer buf iova list */ 1702 INIT_LIST_HEAD(&uaudio_qdev->xfer_ring_list); 1703 uaudio_qdev->curr_xfer_ring_iova = IOVA_XFER_RING_BASE; 1704 uaudio_qdev->xfer_ring_iova_size = 1705 IOVA_XFER_RING_MAX - IOVA_XFER_RING_BASE; 1706 1707 INIT_LIST_HEAD(&uaudio_qdev->xfer_buf_list); 1708 uaudio_qdev->curr_xfer_buf_iova = IOVA_XFER_BUF_BASE; 1709 uaudio_qdev->xfer_buf_iova_size = 1710 IOVA_XFER_BUF_MAX - IOVA_XFER_BUF_BASE; 1711 1712 return 0; 1713 } 1714 1715 /* Populates ppcm_idx array with supported PCM indexes */ 1716 static int qc_usb_audio_offload_fill_avail_pcms(struct snd_usb_audio *chip, 1717 struct snd_soc_usb_device *sdev) 1718 { 1719 struct snd_usb_stream *as; 1720 struct snd_usb_substream *subs; 1721 int idx = 0; 1722 1723 list_for_each_entry(as, &chip->pcm_list, list) { 1724 subs = &as->substream[SNDRV_PCM_STREAM_PLAYBACK]; 1725 if (subs->ep_num) { 1726 sdev->ppcm_idx[idx] = as->pcm->device; 1727 idx++; 1728 } 1729 /* 1730 * Break if the current index exceeds the number of possible 1731 * playback streams counted from the UAC descriptors. 1732 */ 1733 if (idx >= sdev->num_playback) 1734 break; 1735 } 1736 1737 return -1; 1738 } 1739 1740 /** 1741 * qc_usb_audio_offload_probe() - platform op connect handler 1742 * @chip: USB SND device 1743 * 1744 * Platform connect handler when a USB SND device is detected. Will 1745 * notify SOC USB about the connection to enable the USB ASoC backend 1746 * and populate internal USB chip array. 1747 * 1748 */ 1749 static void qc_usb_audio_offload_probe(struct snd_usb_audio *chip) 1750 { 1751 struct usb_interface *intf = chip->intf[chip->num_interfaces - 1]; 1752 struct usb_interface_descriptor *altsd; 1753 struct usb_host_interface *alts; 1754 struct snd_soc_usb_device *sdev; 1755 struct xhci_sideband *sb; 1756 1757 /* 1758 * If there is no priv_data, or no playback paths, the connected 1759 * device doesn't support offloading. Avoid populating entries for 1760 * this device. 1761 */ 1762 if (!snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent) || 1763 !usb_qmi_get_pcm_num(chip, 0)) 1764 return; 1765 1766 guard(mutex)(&qdev_mutex); 1767 guard(mutex)(&chip->mutex); 1768 if (!uadev[chip->card->number].chip) { 1769 sdev = kzalloc_obj(*sdev); 1770 if (!sdev) 1771 return; 1772 1773 sb = xhci_sideband_register(intf, XHCI_SIDEBAND_VENDOR, 1774 uaudio_sideband_notifier); 1775 if (!sb) 1776 goto free_sdev; 1777 } else { 1778 sb = uadev[chip->card->number].sb; 1779 sdev = uadev[chip->card->number].sdev; 1780 } 1781 1782 uadev[chip->card->number].sb = sb; 1783 uadev[chip->card->number].chip = chip; 1784 uadev[chip->card->number].sdev = sdev; 1785 1786 alts = &intf->altsetting[0]; 1787 altsd = get_iface_desc(alts); 1788 1789 /* Wait until all PCM devices are populated before notifying soc-usb */ 1790 if (altsd->bInterfaceNumber == chip->last_iface) { 1791 sdev->num_playback = usb_qmi_get_pcm_num(chip, 0); 1792 1793 /* 1794 * Allocate playback pcm index array based on number of possible 1795 * playback paths within the UAC descriptors. 1796 */ 1797 sdev->ppcm_idx = kcalloc(sdev->num_playback, sizeof(unsigned int), 1798 GFP_KERNEL); 1799 if (!sdev->ppcm_idx) 1800 goto unreg_xhci; 1801 1802 qc_usb_audio_offload_fill_avail_pcms(chip, sdev); 1803 sdev->card_idx = chip->card->number; 1804 sdev->chip_idx = chip->index; 1805 1806 snd_usb_offload_create_ctl(chip, uaudio_qdev->auxdev->dev.parent); 1807 snd_soc_usb_connect(uaudio_qdev->auxdev->dev.parent, sdev); 1808 } 1809 1810 return; 1811 1812 unreg_xhci: 1813 xhci_sideband_unregister(sb); 1814 uadev[chip->card->number].sb = NULL; 1815 free_sdev: 1816 kfree(sdev); 1817 uadev[chip->card->number].sdev = NULL; 1818 uadev[chip->card->number].chip = NULL; 1819 } 1820 1821 /** 1822 * qc_usb_audio_cleanup_qmi_dev() - release qmi device 1823 * 1824 * Frees the USB qdev. Only occurs when there are no longer any potential 1825 * devices that can utilize USB audio offloading. 1826 * 1827 */ 1828 static void qc_usb_audio_cleanup_qmi_dev(void) 1829 { 1830 kfree(uaudio_qdev); 1831 uaudio_qdev = NULL; 1832 } 1833 1834 /** 1835 * qc_usb_audio_offload_disconnect() - platform op disconnect handler 1836 * @chip: USB SND device 1837 * 1838 * Platform disconnect handler. Will ensure that any pending stream is 1839 * halted by issuing a QMI disconnect indication packet to the adsp. 1840 * 1841 */ 1842 static void qc_usb_audio_offload_disconnect(struct snd_usb_audio *chip) 1843 { 1844 struct uaudio_dev *dev; 1845 int card_num; 1846 1847 if (!chip) 1848 return; 1849 1850 card_num = chip->card->number; 1851 if (card_num >= SNDRV_CARDS) 1852 return; 1853 1854 guard(mutex)(&qdev_mutex); 1855 guard(mutex)(&chip->mutex); 1856 dev = &uadev[card_num]; 1857 1858 /* Device has already been cleaned up, or never populated */ 1859 if (!dev->chip) 1860 return; 1861 1862 /* cleaned up already */ 1863 if (!dev->udev) 1864 goto done; 1865 1866 uaudio_send_disconnect_ind(chip); 1867 uaudio_dev_cleanup(dev); 1868 done: 1869 /* 1870 * If num_interfaces == 1, the last USB SND interface is being removed. 1871 * This is to accommodate for devices w/ multiple UAC functions. 1872 */ 1873 if (chip->num_interfaces == 1) { 1874 snd_soc_usb_disconnect(uaudio_qdev->auxdev->dev.parent, dev->sdev); 1875 xhci_sideband_unregister(dev->sb); 1876 dev->chip = NULL; 1877 kfree(dev->sdev->ppcm_idx); 1878 kfree(dev->sdev); 1879 dev->sdev = NULL; 1880 } 1881 } 1882 1883 /** 1884 * qc_usb_audio_offload_suspend() - USB offload PM suspend handler 1885 * @intf: USB interface 1886 * @message: suspend type 1887 * 1888 * PM suspend handler to ensure that the USB offloading driver is able to stop 1889 * any pending traffic, so that the bus can be suspended. 1890 * 1891 */ 1892 static void qc_usb_audio_offload_suspend(struct usb_interface *intf, 1893 pm_message_t message) 1894 { 1895 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1896 int card_num; 1897 1898 if (!chip) 1899 return; 1900 1901 card_num = chip->card->number; 1902 if (card_num >= SNDRV_CARDS) 1903 return; 1904 1905 guard(mutex)(&qdev_mutex); 1906 guard(mutex)(&chip->mutex); 1907 1908 uaudio_send_disconnect_ind(chip); 1909 } 1910 1911 static struct snd_usb_platform_ops offload_ops = { 1912 .connect_cb = qc_usb_audio_offload_probe, 1913 .disconnect_cb = qc_usb_audio_offload_disconnect, 1914 .suspend_cb = qc_usb_audio_offload_suspend, 1915 }; 1916 1917 static int qc_usb_audio_probe(struct auxiliary_device *auxdev, 1918 const struct auxiliary_device_id *id) 1919 1920 { 1921 struct uaudio_qmi_svc *svc; 1922 int ret; 1923 1924 svc = kzalloc_obj(*svc); 1925 if (!svc) 1926 return -ENOMEM; 1927 1928 svc->uaudio_svc_hdl = kzalloc_obj(*svc->uaudio_svc_hdl); 1929 if (!svc->uaudio_svc_hdl) { 1930 ret = -ENOMEM; 1931 goto free_svc; 1932 } 1933 1934 ret = qmi_handle_init(svc->uaudio_svc_hdl, 1935 QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1936 &uaudio_svc_ops_options, 1937 &uaudio_stream_req_handlers); 1938 ret = qmi_add_server(svc->uaudio_svc_hdl, UAUDIO_STREAM_SERVICE_ID_V01, 1939 UAUDIO_STREAM_SERVICE_VERS_V01, 0); 1940 1941 uaudio_svc = svc; 1942 1943 qc_usb_audio_offload_init_qmi_dev(); 1944 uaudio_qdev->auxdev = auxdev; 1945 1946 ret = snd_usb_register_platform_ops(&offload_ops); 1947 if (ret < 0) 1948 goto release_qmi; 1949 1950 snd_usb_rediscover_devices(); 1951 1952 return 0; 1953 1954 release_qmi: 1955 qc_usb_audio_cleanup_qmi_dev(); 1956 qmi_handle_release(svc->uaudio_svc_hdl); 1957 free_svc: 1958 kfree(svc); 1959 1960 return ret; 1961 } 1962 1963 static void qc_usb_audio_remove(struct auxiliary_device *auxdev) 1964 { 1965 struct uaudio_qmi_svc *svc = uaudio_svc; 1966 int idx; 1967 1968 /* 1969 * Remove all connected devices after unregistering ops, to ensure 1970 * that no further connect events will occur. The disconnect routine 1971 * will issue the QMI disconnect indication, which results in the 1972 * external DSP to stop issuing transfers. 1973 */ 1974 snd_usb_unregister_platform_ops(); 1975 for (idx = 0; idx < SNDRV_CARDS; idx++) 1976 qc_usb_audio_offload_disconnect(uadev[idx].chip); 1977 1978 qc_usb_audio_cleanup_qmi_dev(); 1979 1980 qmi_handle_release(svc->uaudio_svc_hdl); 1981 kfree(svc); 1982 uaudio_svc = NULL; 1983 } 1984 1985 static const struct auxiliary_device_id qc_usb_audio_table[] = { 1986 { .name = "q6usb.qc-usb-audio-offload" }, 1987 {}, 1988 }; 1989 MODULE_DEVICE_TABLE(auxiliary, qc_usb_audio_table); 1990 1991 static struct auxiliary_driver qc_usb_audio_offload_drv = { 1992 .name = "qc-usb-audio-offload", 1993 .id_table = qc_usb_audio_table, 1994 .probe = qc_usb_audio_probe, 1995 .remove = qc_usb_audio_remove, 1996 }; 1997 module_auxiliary_driver(qc_usb_audio_offload_drv); 1998 1999 MODULE_DESCRIPTION("QC USB Audio Offloading"); 2000 MODULE_LICENSE("GPL"); 2001