1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2022-2025 Qualcomm Innovation Center, Inc. All rights reserved. 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(sizeof(*info), GFP_KERNEL); 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 /** 542 * uaudio_iommu_map() - maps iommu memory for adsp 543 * @mtype: ring type 544 * @dma_coherent: dma coherent 545 * @pa: physical address for ring/buffer 546 * @size: size of memory region 547 * @sgt: sg table for memory region 548 * 549 * Maps the XHCI related resources to a memory region that is assigned to be 550 * used by the adsp. This will be mapped to the domain, which is created by 551 * the ASoC USB backend driver. 552 * 553 */ 554 static unsigned long uaudio_iommu_map(enum mem_type mtype, bool dma_coherent, 555 phys_addr_t pa, size_t size, 556 struct sg_table *sgt) 557 { 558 struct scatterlist *sg; 559 unsigned long iova = 0; 560 size_t total_len = 0; 561 unsigned long iova_sg; 562 phys_addr_t pa_sg; 563 bool map = true; 564 size_t sg_len; 565 int prot; 566 int ret; 567 int i; 568 569 prot = IOMMU_READ | IOMMU_WRITE; 570 571 if (dma_coherent) 572 prot |= IOMMU_CACHE; 573 574 switch (mtype) { 575 case MEM_EVENT_RING: 576 iova = IOVA_BASE; 577 /* er already mapped */ 578 if (uaudio_qdev->er_mapped) 579 map = false; 580 break; 581 case MEM_XFER_RING: 582 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_ring_iova, 583 &uaudio_qdev->xfer_ring_iova_size, 584 &uaudio_qdev->xfer_ring_list, size); 585 break; 586 case MEM_XFER_BUF: 587 iova = uaudio_get_iova(&uaudio_qdev->curr_xfer_buf_iova, 588 &uaudio_qdev->xfer_buf_iova_size, 589 &uaudio_qdev->xfer_buf_list, size); 590 break; 591 default: 592 dev_err(uaudio_qdev->data->dev, "unknown mem type %d\n", mtype); 593 } 594 595 if (!iova || !map) 596 goto done; 597 598 if (!sgt) 599 goto skip_sgt_map; 600 601 iova_sg = iova; 602 for_each_sg(sgt->sgl, sg, sgt->nents, i) { 603 sg_len = PAGE_ALIGN(sg->offset + sg->length); 604 pa_sg = page_to_phys(sg_page(sg)); 605 ret = iommu_map(uaudio_qdev->data->domain, iova_sg, pa_sg, sg_len, 606 prot, GFP_KERNEL); 607 if (ret) { 608 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 609 iova = 0; 610 goto done; 611 } 612 613 iova_sg += sg_len; 614 total_len += sg_len; 615 } 616 617 if (size != total_len) { 618 uaudio_iommu_unmap(MEM_XFER_BUF, iova, size, total_len); 619 iova = 0; 620 } 621 return iova; 622 623 skip_sgt_map: 624 iommu_map(uaudio_qdev->data->domain, iova, pa, size, prot, GFP_KERNEL); 625 626 done: 627 return iova; 628 } 629 630 /* looks up alias, if any, for controller DT node and returns the index */ 631 static int usb_get_controller_id(struct usb_device *udev) 632 { 633 if (udev->bus->sysdev && udev->bus->sysdev->of_node) 634 return of_alias_get_id(udev->bus->sysdev->of_node, "usb"); 635 636 return -ENODEV; 637 } 638 639 /** 640 * uaudio_dev_intf_cleanup() - cleanup transfer resources 641 * @udev: usb device 642 * @info: usb offloading interface 643 * 644 * Cleans up the transfer ring related resources which are assigned per 645 * endpoint from XHCI. This is invoked when the USB endpoints are no 646 * longer in use by the adsp. 647 * 648 */ 649 static void uaudio_dev_intf_cleanup(struct usb_device *udev, struct intf_info *info) 650 { 651 uaudio_iommu_unmap(MEM_XFER_RING, info->data_xfer_ring_va, 652 info->data_xfer_ring_size, info->data_xfer_ring_size); 653 info->data_xfer_ring_va = 0; 654 info->data_xfer_ring_size = 0; 655 656 uaudio_iommu_unmap(MEM_XFER_RING, info->sync_xfer_ring_va, 657 info->sync_xfer_ring_size, info->sync_xfer_ring_size); 658 info->sync_xfer_ring_va = 0; 659 info->sync_xfer_ring_size = 0; 660 661 uaudio_iommu_unmap(MEM_XFER_BUF, info->xfer_buf_iova, info->xfer_buf_size, 662 info->xfer_buf_size); 663 info->xfer_buf_iova = 0; 664 665 usb_free_coherent(udev, info->xfer_buf_size, info->xfer_buf_cpu, 666 info->xfer_buf_dma); 667 info->xfer_buf_size = 0; 668 info->xfer_buf_cpu = NULL; 669 info->xfer_buf_dma = 0; 670 671 info->in_use = false; 672 } 673 674 /** 675 * uaudio_event_ring_cleanup_free() - cleanup secondary event ring 676 * @dev: usb offload device 677 * 678 * Cleans up the secondary event ring that was requested. This will 679 * occur when the adsp is no longer transferring data on the USB bus 680 * across all endpoints. 681 * 682 */ 683 static void uaudio_event_ring_cleanup_free(struct uaudio_dev *dev) 684 { 685 clear_bit(dev->chip->card->number, &uaudio_qdev->card_slot); 686 /* all audio devices are disconnected */ 687 if (!uaudio_qdev->card_slot) { 688 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, 689 PAGE_SIZE); 690 xhci_sideband_remove_interrupter(uadev[dev->chip->card->number].sb); 691 } 692 } 693 694 static void uaudio_dev_cleanup(struct uaudio_dev *dev) 695 { 696 int if_idx; 697 698 if (!dev->udev) 699 return; 700 701 /* free xfer buffer and unmap xfer ring and buf per interface */ 702 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 703 if (!dev->info[if_idx].in_use) 704 continue; 705 uaudio_dev_intf_cleanup(dev->udev, &dev->info[if_idx]); 706 dev_dbg(uaudio_qdev->data->dev, 707 "release resources: intf# %d card# %d\n", 708 dev->info[if_idx].intf_num, dev->chip->card->number); 709 } 710 711 dev->num_intf = 0; 712 713 /* free interface info */ 714 kfree(dev->info); 715 dev->info = NULL; 716 uaudio_event_ring_cleanup_free(dev); 717 dev->udev = NULL; 718 } 719 720 /** 721 * disable_audio_stream() - disable usb snd endpoints 722 * @subs: usb substream 723 * 724 * Closes the USB SND endpoints associated with the current audio stream 725 * used. This will decrement the USB SND endpoint opened reference count. 726 * 727 */ 728 static void disable_audio_stream(struct snd_usb_substream *subs) 729 { 730 struct snd_usb_audio *chip = subs->stream->chip; 731 732 snd_usb_hw_free(subs); 733 snd_usb_autosuspend(chip); 734 } 735 736 /* QMI service disconnect handlers */ 737 static void qmi_stop_session(void) 738 { 739 struct snd_usb_substream *subs; 740 struct usb_host_endpoint *ep; 741 struct snd_usb_audio *chip; 742 struct intf_info *info; 743 int pcm_card_num; 744 int if_idx; 745 int idx; 746 747 mutex_lock(&qdev_mutex); 748 /* find all active intf for set alt 0 and cleanup usb audio dev */ 749 for (idx = 0; idx < SNDRV_CARDS; idx++) { 750 if (!atomic_read(&uadev[idx].in_use)) 751 continue; 752 753 chip = uadev[idx].chip; 754 for (if_idx = 0; if_idx < uadev[idx].num_intf; if_idx++) { 755 if (!uadev[idx].info || !uadev[idx].info[if_idx].in_use) 756 continue; 757 info = &uadev[idx].info[if_idx]; 758 pcm_card_num = info->pcm_card_num; 759 subs = find_substream(pcm_card_num, info->pcm_dev_num, 760 info->direction); 761 if (!subs || !chip || atomic_read(&chip->shutdown)) { 762 dev_err(&uadev[idx].udev->dev, 763 "no sub for c#%u dev#%u dir%u\n", 764 info->pcm_card_num, 765 info->pcm_dev_num, 766 info->direction); 767 continue; 768 } 769 /* Release XHCI endpoints */ 770 if (info->data_ep_pipe) 771 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 772 info->data_ep_pipe); 773 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, ep); 774 775 if (info->sync_ep_pipe) 776 ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, 777 info->sync_ep_pipe); 778 xhci_sideband_remove_endpoint(uadev[pcm_card_num].sb, ep); 779 780 disable_audio_stream(subs); 781 } 782 atomic_set(&uadev[idx].in_use, 0); 783 mutex_lock(&chip->mutex); 784 uaudio_dev_cleanup(&uadev[idx]); 785 mutex_unlock(&chip->mutex); 786 } 787 mutex_unlock(&qdev_mutex); 788 } 789 790 /** 791 * uaudio_sideband_notifier() - xHCI sideband event handler 792 * @intf: USB interface handle 793 * @evt: xHCI sideband event type 794 * 795 * This callback is executed when the xHCI sideband encounters a sequence 796 * that requires the sideband clients to take action. An example, is when 797 * xHCI frees the transfer ring, so the client has to ensure that the 798 * offload path is halted. 799 * 800 */ 801 static int uaudio_sideband_notifier(struct usb_interface *intf, 802 struct xhci_sideband_event *evt) 803 { 804 struct snd_usb_audio *chip; 805 struct uaudio_dev *dev; 806 int if_idx; 807 808 if (!intf || !evt) 809 return 0; 810 811 chip = usb_get_intfdata(intf); 812 813 mutex_lock(&qdev_mutex); 814 mutex_lock(&chip->mutex); 815 816 dev = &uadev[chip->card->number]; 817 818 if (evt->type == XHCI_SIDEBAND_XFER_RING_FREE) { 819 unsigned int *ep = (unsigned int *) evt->evt_data; 820 821 for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { 822 if (dev->info[if_idx].data_ep_idx == *ep || 823 dev->info[if_idx].sync_ep_idx == *ep) 824 uaudio_send_disconnect_ind(chip); 825 } 826 } 827 828 mutex_unlock(&qdev_mutex); 829 mutex_unlock(&chip->mutex); 830 831 return 0; 832 } 833 834 /** 835 * qmi_bye_cb() - qmi bye message callback 836 * @handle: QMI handle 837 * @node: id of the dying node 838 * 839 * This callback is invoked when the QMI bye control message is received 840 * from the QMI client. Handle the message accordingly by ensuring that 841 * the USB offload path is disabled and cleaned up. At this point, ADSP 842 * is not utilizing the USB bus. 843 * 844 */ 845 static void qmi_bye_cb(struct qmi_handle *handle, unsigned int node) 846 { 847 struct uaudio_qmi_svc *svc = uaudio_svc; 848 849 if (svc->uaudio_svc_hdl != handle) 850 return; 851 852 if (svc->client_connected && svc->client_sq.sq_node == node) { 853 qmi_stop_session(); 854 855 /* clear QMI client parameters to block further QMI messages */ 856 svc->client_sq.sq_node = 0; 857 svc->client_sq.sq_port = 0; 858 svc->client_sq.sq_family = 0; 859 svc->client_connected = false; 860 } 861 } 862 863 /** 864 * qmi_svc_disconnect_cb() - qmi client disconnected 865 * @handle: QMI handle 866 * @node: id of the dying node 867 * @port: port of the dying client 868 * 869 * Invoked when the remote QMI client is disconnected. Handle this event 870 * the same way as when the QMI bye message is received. This will ensure 871 * the USB offloading path is disabled and cleaned up. 872 * 873 */ 874 static void qmi_svc_disconnect_cb(struct qmi_handle *handle, 875 unsigned int node, unsigned int port) 876 { 877 struct uaudio_qmi_svc *svc; 878 879 if (!uaudio_svc) 880 return; 881 882 svc = uaudio_svc; 883 if (svc->uaudio_svc_hdl != handle) 884 return; 885 886 if (svc->client_connected && svc->client_sq.sq_node == node && 887 svc->client_sq.sq_port == port) { 888 qmi_stop_session(); 889 890 /* clear QMI client parameters to block further QMI messages */ 891 svc->client_sq.sq_node = 0; 892 svc->client_sq.sq_port = 0; 893 svc->client_sq.sq_family = 0; 894 svc->client_connected = false; 895 } 896 } 897 898 /* QMI client callback handlers from QMI interface */ 899 static struct qmi_ops uaudio_svc_ops_options = { 900 .bye = qmi_bye_cb, 901 .del_client = qmi_svc_disconnect_cb, 902 }; 903 904 /* kref release callback when all streams are disabled */ 905 static void uaudio_dev_release(struct kref *kref) 906 { 907 struct uaudio_dev *dev = container_of(kref, struct uaudio_dev, kref); 908 909 uaudio_event_ring_cleanup_free(dev); 910 atomic_set(&dev->in_use, 0); 911 wake_up(&dev->disconnect_wq); 912 } 913 914 /** 915 * enable_audio_stream() - enable usb snd endpoints 916 * @subs: usb substream 917 * @pcm_format: pcm format requested 918 * @channels: number of channels 919 * @cur_rate: sample rate 920 * @datainterval: interval 921 * 922 * Opens all USB SND endpoints used for the data interface. This will increment 923 * the USB SND endpoint's opened count. Requests to keep the interface resumed 924 * until the audio stream is stopped. Will issue the USB set interface control 925 * message to enable the data interface. 926 * 927 */ 928 static int enable_audio_stream(struct snd_usb_substream *subs, 929 snd_pcm_format_t pcm_format, 930 unsigned int channels, unsigned int cur_rate, 931 int datainterval) 932 { 933 struct snd_pcm_hw_params params; 934 struct snd_usb_audio *chip; 935 struct snd_interval *i; 936 struct snd_mask *m; 937 int ret; 938 939 chip = subs->stream->chip; 940 941 _snd_pcm_hw_params_any(¶ms); 942 943 m = hw_param_mask(¶ms, SNDRV_PCM_HW_PARAM_FORMAT); 944 snd_mask_leave(m, pcm_format); 945 946 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_CHANNELS); 947 snd_interval_setinteger(i); 948 i->min = channels; 949 i->max = channels; 950 951 i = hw_param_interval(¶ms, SNDRV_PCM_HW_PARAM_RATE); 952 snd_interval_setinteger(i); 953 i->min = cur_rate; 954 i->max = cur_rate; 955 956 pm_runtime_barrier(&chip->intf[0]->dev); 957 snd_usb_autoresume(chip); 958 959 ret = snd_usb_hw_params(subs, ¶ms); 960 if (ret < 0) 961 goto put_suspend; 962 963 if (!atomic_read(&chip->shutdown)) { 964 ret = snd_usb_lock_shutdown(chip); 965 if (ret < 0) 966 goto detach_ep; 967 968 if (subs->sync_endpoint) { 969 ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); 970 if (ret < 0) 971 goto unlock; 972 } 973 974 ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); 975 if (ret < 0) 976 goto unlock; 977 978 snd_usb_unlock_shutdown(chip); 979 980 dev_dbg(uaudio_qdev->data->dev, 981 "selected %s iface:%d altsetting:%d datainterval:%dus\n", 982 subs->direction ? "capture" : "playback", 983 subs->cur_audiofmt->iface, subs->cur_audiofmt->altsetting, 984 (1 << subs->cur_audiofmt->datainterval) * 985 (subs->dev->speed >= USB_SPEED_HIGH ? 986 BUS_INTERVAL_HIGHSPEED_AND_ABOVE : 987 BUS_INTERVAL_FULL_SPEED)); 988 } 989 990 return 0; 991 992 unlock: 993 snd_usb_unlock_shutdown(chip); 994 995 detach_ep: 996 snd_usb_hw_free(subs); 997 998 put_suspend: 999 snd_usb_autosuspend(chip); 1000 1001 return ret; 1002 } 1003 1004 /** 1005 * uaudio_transfer_buffer_setup() - fetch and populate xfer buffer params 1006 * @subs: usb substream 1007 * @xfer_buf: xfer buf to be allocated 1008 * @xfer_buf_len: size of allocation 1009 * @mem_info: QMI response info 1010 * 1011 * Allocates and maps the transfer buffers that will be utilized by the 1012 * audio DSP. Will populate the information in the QMI response that is 1013 * sent back to the stream enable request. 1014 * 1015 */ 1016 static int uaudio_transfer_buffer_setup(struct snd_usb_substream *subs, 1017 void **xfer_buf_cpu, u32 xfer_buf_len, 1018 struct mem_info_v01 *mem_info) 1019 { 1020 struct sg_table xfer_buf_sgt; 1021 dma_addr_t xfer_buf_dma; 1022 void *xfer_buf; 1023 phys_addr_t xfer_buf_pa; 1024 u32 len = xfer_buf_len; 1025 bool dma_coherent; 1026 dma_addr_t xfer_buf_dma_sysdev; 1027 u32 remainder; 1028 u32 mult; 1029 int ret; 1030 1031 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1032 1033 /* xfer buffer, multiple of 4K only */ 1034 if (!len) 1035 len = PAGE_SIZE; 1036 1037 mult = len / PAGE_SIZE; 1038 remainder = len % PAGE_SIZE; 1039 len = mult * PAGE_SIZE; 1040 len += remainder ? PAGE_SIZE : 0; 1041 1042 if (len > MAX_XFER_BUFF_LEN) { 1043 dev_err(uaudio_qdev->data->dev, 1044 "req buf len %d > max buf len %lu, setting %lu\n", 1045 len, MAX_XFER_BUFF_LEN, MAX_XFER_BUFF_LEN); 1046 len = MAX_XFER_BUFF_LEN; 1047 } 1048 1049 /* get buffer mapped into subs->dev */ 1050 xfer_buf = usb_alloc_coherent(subs->dev, len, GFP_KERNEL, &xfer_buf_dma); 1051 if (!xfer_buf) 1052 return -ENOMEM; 1053 1054 /* Remapping is not possible if xfer_buf is outside of linear map */ 1055 xfer_buf_pa = virt_to_phys(xfer_buf); 1056 if (WARN_ON(!page_is_ram(PFN_DOWN(xfer_buf_pa)))) { 1057 ret = -ENXIO; 1058 goto unmap_sync; 1059 } 1060 dma_get_sgtable(subs->dev->bus->sysdev, &xfer_buf_sgt, xfer_buf, 1061 xfer_buf_dma, len); 1062 1063 /* map the physical buffer into sysdev as well */ 1064 xfer_buf_dma_sysdev = uaudio_iommu_map(MEM_XFER_BUF, dma_coherent, 1065 xfer_buf_pa, len, &xfer_buf_sgt); 1066 if (!xfer_buf_dma_sysdev) { 1067 ret = -ENOMEM; 1068 goto unmap_sync; 1069 } 1070 1071 mem_info->dma = xfer_buf_dma; 1072 mem_info->size = len; 1073 mem_info->iova = PREPEND_SID_TO_IOVA(xfer_buf_dma_sysdev, uaudio_qdev->data->sid); 1074 *xfer_buf_cpu = xfer_buf; 1075 sg_free_table(&xfer_buf_sgt); 1076 1077 return 0; 1078 1079 unmap_sync: 1080 usb_free_coherent(subs->dev, len, xfer_buf, xfer_buf_dma); 1081 1082 return ret; 1083 } 1084 1085 /** 1086 * uaudio_endpoint_setup() - fetch and populate endpoint params 1087 * @subs: usb substream 1088 * @endpoint: usb endpoint to add 1089 * @card_num: uadev index 1090 * @mem_info: QMI response info 1091 * @ep_desc: QMI ep desc response field 1092 * 1093 * Initialize the USB endpoint being used for a particular USB 1094 * stream. Will request XHCI sec intr to reserve the EP for 1095 * offloading as well as populating the QMI response with the 1096 * transfer ring parameters. 1097 * 1098 */ 1099 static phys_addr_t 1100 uaudio_endpoint_setup(struct snd_usb_substream *subs, 1101 struct snd_usb_endpoint *endpoint, int card_num, 1102 struct mem_info_v01 *mem_info, 1103 struct usb_endpoint_descriptor_v01 *ep_desc) 1104 { 1105 struct usb_host_endpoint *ep; 1106 phys_addr_t tr_pa = 0; 1107 struct sg_table *sgt; 1108 bool dma_coherent; 1109 unsigned long iova; 1110 struct page *pg; 1111 int ret = -ENODEV; 1112 1113 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1114 1115 ep = usb_pipe_endpoint(subs->dev, endpoint->pipe); 1116 if (!ep) { 1117 dev_err(uaudio_qdev->data->dev, "data ep # %d context is null\n", 1118 subs->data_endpoint->ep_num); 1119 goto exit; 1120 } 1121 1122 memcpy(ep_desc, &ep->desc, sizeof(ep->desc)); 1123 1124 ret = xhci_sideband_add_endpoint(uadev[card_num].sb, ep); 1125 if (ret < 0) { 1126 dev_err(&subs->dev->dev, 1127 "failed to add data ep to sec intr\n"); 1128 ret = -ENODEV; 1129 goto exit; 1130 } 1131 1132 sgt = xhci_sideband_get_endpoint_buffer(uadev[card_num].sb, ep); 1133 if (!sgt) { 1134 dev_err(&subs->dev->dev, 1135 "failed to get data ep ring address\n"); 1136 ret = -ENODEV; 1137 goto remove_ep; 1138 } 1139 1140 pg = sg_page(sgt->sgl); 1141 tr_pa = page_to_phys(pg); 1142 mem_info->dma = sg_dma_address(sgt->sgl); 1143 sg_free_table(sgt); 1144 1145 /* data transfer ring */ 1146 iova = uaudio_iommu_map(MEM_XFER_RING, dma_coherent, tr_pa, 1147 PAGE_SIZE, NULL); 1148 if (!iova) { 1149 ret = -ENOMEM; 1150 goto clear_pa; 1151 } 1152 1153 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1154 mem_info->size = PAGE_SIZE; 1155 1156 return 0; 1157 1158 clear_pa: 1159 mem_info->dma = 0; 1160 remove_ep: 1161 xhci_sideband_remove_endpoint(uadev[card_num].sb, ep); 1162 exit: 1163 return ret; 1164 } 1165 1166 /** 1167 * uaudio_event_ring_setup() - fetch and populate event ring params 1168 * @subs: usb substream 1169 * @card_num: uadev index 1170 * @mem_info: QMI response info 1171 * 1172 * Register secondary interrupter to XHCI and fetch the event buffer info 1173 * and populate the information into the QMI response. 1174 * 1175 */ 1176 static int uaudio_event_ring_setup(struct snd_usb_substream *subs, 1177 int card_num, struct mem_info_v01 *mem_info) 1178 { 1179 struct sg_table *sgt; 1180 phys_addr_t er_pa; 1181 bool dma_coherent; 1182 unsigned long iova; 1183 struct page *pg; 1184 int ret; 1185 1186 dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); 1187 er_pa = 0; 1188 1189 /* event ring */ 1190 ret = xhci_sideband_create_interrupter(uadev[card_num].sb, 1, false, 1191 0, uaudio_qdev->data->intr_num); 1192 if (ret < 0) { 1193 dev_err(&subs->dev->dev, "failed to fetch interrupter\n"); 1194 goto exit; 1195 } 1196 1197 sgt = xhci_sideband_get_event_buffer(uadev[card_num].sb); 1198 if (!sgt) { 1199 dev_err(&subs->dev->dev, 1200 "failed to get event ring address\n"); 1201 ret = -ENODEV; 1202 goto remove_interrupter; 1203 } 1204 1205 pg = sg_page(sgt->sgl); 1206 er_pa = page_to_phys(pg); 1207 mem_info->dma = sg_dma_address(sgt->sgl); 1208 sg_free_table(sgt); 1209 1210 iova = uaudio_iommu_map(MEM_EVENT_RING, dma_coherent, er_pa, 1211 PAGE_SIZE, NULL); 1212 if (!iova) { 1213 ret = -ENOMEM; 1214 goto clear_pa; 1215 } 1216 1217 mem_info->iova = PREPEND_SID_TO_IOVA(iova, uaudio_qdev->data->sid); 1218 mem_info->size = PAGE_SIZE; 1219 1220 return 0; 1221 1222 clear_pa: 1223 mem_info->dma = 0; 1224 remove_interrupter: 1225 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1226 exit: 1227 return ret; 1228 } 1229 1230 /** 1231 * uaudio_populate_uac_desc() - parse UAC parameters and populate QMI resp 1232 * @subs: usb substream 1233 * @resp: QMI response buffer 1234 * 1235 * Parses information specified within UAC descriptors which explain the 1236 * sample parameters that the device expects. This information is populated 1237 * to the QMI response sent back to the audio DSP. 1238 * 1239 */ 1240 static int uaudio_populate_uac_desc(struct snd_usb_substream *subs, 1241 struct qmi_uaudio_stream_resp_msg_v01 *resp) 1242 { 1243 struct usb_interface_descriptor *altsd; 1244 struct usb_host_interface *alts; 1245 struct usb_interface *iface; 1246 int protocol; 1247 1248 iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface); 1249 if (!iface) { 1250 dev_err(&subs->dev->dev, "interface # %d does not exist\n", 1251 subs->cur_audiofmt->iface); 1252 return -ENODEV; 1253 } 1254 1255 alts = &iface->altsetting[subs->cur_audiofmt->altset_idx]; 1256 altsd = get_iface_desc(alts); 1257 protocol = altsd->bInterfaceProtocol; 1258 1259 if (protocol == UAC_VERSION_1) { 1260 struct uac1_as_header_descriptor *as; 1261 1262 as = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, 1263 UAC_AS_GENERAL); 1264 if (!as) { 1265 dev_err(&subs->dev->dev, 1266 "%u:%d : no UAC_AS_GENERAL desc\n", 1267 subs->cur_audiofmt->iface, 1268 subs->cur_audiofmt->altset_idx); 1269 return -ENODEV; 1270 } 1271 1272 resp->data_path_delay = as->bDelay; 1273 resp->data_path_delay_valid = 1; 1274 1275 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1276 resp->usb_audio_subslot_size_valid = 1; 1277 1278 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0100); 1279 resp->usb_audio_spec_revision_valid = 1; 1280 } else if (protocol == UAC_VERSION_2) { 1281 resp->usb_audio_subslot_size = subs->cur_audiofmt->fmt_sz; 1282 resp->usb_audio_subslot_size_valid = 1; 1283 1284 resp->usb_audio_spec_revision = le16_to_cpu((__force __le16)0x0200); 1285 resp->usb_audio_spec_revision_valid = 1; 1286 } else if (protocol == UAC_VERSION_3) { 1287 if (iface->intf_assoc->bFunctionSubClass == 1288 UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0) { 1289 dev_err(&subs->dev->dev, 1290 "full adc is not supported\n"); 1291 return -EINVAL; 1292 } 1293 1294 switch (le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize)) { 1295 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: 1296 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: 1297 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: 1298 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: { 1299 resp->usb_audio_subslot_size = 0x2; 1300 break; 1301 } 1302 1303 case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: 1304 case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: 1305 case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: 1306 case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: { 1307 resp->usb_audio_subslot_size = 0x3; 1308 break; 1309 } 1310 1311 default: 1312 dev_err(&subs->dev->dev, 1313 "%d: %u: Invalid wMaxPacketSize\n", 1314 subs->cur_audiofmt->iface, 1315 subs->cur_audiofmt->altset_idx); 1316 return -EINVAL; 1317 } 1318 resp->usb_audio_subslot_size_valid = 1; 1319 } else { 1320 dev_err(&subs->dev->dev, "unknown protocol version %x\n", 1321 protocol); 1322 return -ENODEV; 1323 } 1324 1325 memcpy(&resp->std_as_opr_intf_desc, &alts->desc, sizeof(alts->desc)); 1326 1327 return 0; 1328 } 1329 1330 /** 1331 * prepare_qmi_response() - prepare stream enable response 1332 * @subs: usb substream 1333 * @req_msg: QMI request message 1334 * @resp: QMI response buffer 1335 * @info_idx: usb interface array index 1336 * 1337 * Prepares the QMI response for a USB QMI stream enable request. Will parse 1338 * out the parameters within the stream enable request, in order to match 1339 * requested audio profile to the ones exposed by the USB device connected. 1340 * 1341 * In addition, will fetch the XHCI transfer resources needed for the handoff to 1342 * happen. This includes, transfer ring and buffer addresses and secondary event 1343 * ring address. These parameters will be communicated as part of the USB QMI 1344 * stream enable response. 1345 * 1346 */ 1347 static int prepare_qmi_response(struct snd_usb_substream *subs, 1348 struct qmi_uaudio_stream_req_msg_v01 *req_msg, 1349 struct qmi_uaudio_stream_resp_msg_v01 *resp, 1350 int info_idx) 1351 { 1352 struct q6usb_offload *data; 1353 int pcm_dev_num; 1354 int card_num; 1355 void *xfer_buf_cpu; 1356 int ret; 1357 1358 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1359 card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1360 1361 if (!uadev[card_num].ctrl_intf) { 1362 dev_err(&subs->dev->dev, "audio ctrl intf info not cached\n"); 1363 return -ENODEV; 1364 } 1365 1366 ret = uaudio_populate_uac_desc(subs, resp); 1367 if (ret < 0) 1368 return ret; 1369 1370 resp->slot_id = subs->dev->slot_id; 1371 resp->slot_id_valid = 1; 1372 1373 data = snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent); 1374 if (!data) { 1375 dev_err(&subs->dev->dev, "No private data found\n"); 1376 return -ENODEV; 1377 } 1378 1379 uaudio_qdev->data = data; 1380 1381 resp->std_as_opr_intf_desc_valid = 1; 1382 ret = uaudio_endpoint_setup(subs, subs->data_endpoint, card_num, 1383 &resp->xhci_mem_info.tr_data, 1384 &resp->std_as_data_ep_desc); 1385 if (ret < 0) 1386 return ret; 1387 1388 resp->std_as_data_ep_desc_valid = 1; 1389 1390 if (subs->sync_endpoint) { 1391 ret = uaudio_endpoint_setup(subs, subs->sync_endpoint, card_num, 1392 &resp->xhci_mem_info.tr_sync, 1393 &resp->std_as_sync_ep_desc); 1394 if (ret < 0) 1395 goto drop_data_ep; 1396 1397 resp->std_as_sync_ep_desc_valid = 1; 1398 } 1399 1400 resp->interrupter_num_valid = 1; 1401 resp->controller_num_valid = 0; 1402 ret = usb_get_controller_id(subs->dev); 1403 if (ret >= 0) { 1404 resp->controller_num = ret; 1405 resp->controller_num_valid = 1; 1406 } 1407 1408 /* event ring */ 1409 ret = uaudio_event_ring_setup(subs, card_num, 1410 &resp->xhci_mem_info.evt_ring); 1411 if (ret < 0) 1412 goto drop_sync_ep; 1413 1414 uaudio_qdev->er_mapped = true; 1415 resp->interrupter_num = xhci_sideband_interrupter_id(uadev[card_num].sb); 1416 1417 resp->speed_info = get_speed_info(subs->dev->speed); 1418 if (resp->speed_info == USB_QMI_DEVICE_SPEED_INVALID_V01) { 1419 ret = -ENODEV; 1420 goto free_sec_ring; 1421 } 1422 1423 resp->speed_info_valid = 1; 1424 1425 ret = uaudio_transfer_buffer_setup(subs, &xfer_buf_cpu, req_msg->xfer_buff_size, 1426 &resp->xhci_mem_info.xfer_buff); 1427 if (ret < 0) { 1428 ret = -ENOMEM; 1429 goto free_sec_ring; 1430 } 1431 1432 resp->xhci_mem_info_valid = 1; 1433 1434 if (!atomic_read(&uadev[card_num].in_use)) { 1435 kref_init(&uadev[card_num].kref); 1436 init_waitqueue_head(&uadev[card_num].disconnect_wq); 1437 uadev[card_num].num_intf = 1438 subs->dev->config->desc.bNumInterfaces; 1439 uadev[card_num].info = kcalloc(uadev[card_num].num_intf, 1440 sizeof(struct intf_info), 1441 GFP_KERNEL); 1442 if (!uadev[card_num].info) { 1443 ret = -ENOMEM; 1444 goto unmap_er; 1445 } 1446 uadev[card_num].udev = subs->dev; 1447 atomic_set(&uadev[card_num].in_use, 1); 1448 } else { 1449 kref_get(&uadev[card_num].kref); 1450 } 1451 1452 uadev[card_num].usb_core_id = resp->controller_num; 1453 1454 /* cache intf specific info to use it for unmap and free xfer buf */ 1455 uadev[card_num].info[info_idx].data_xfer_ring_va = 1456 IOVA_MASK(resp->xhci_mem_info.tr_data.iova); 1457 uadev[card_num].info[info_idx].data_xfer_ring_size = PAGE_SIZE; 1458 uadev[card_num].info[info_idx].sync_xfer_ring_va = 1459 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova); 1460 uadev[card_num].info[info_idx].sync_xfer_ring_size = PAGE_SIZE; 1461 uadev[card_num].info[info_idx].xfer_buf_iova = 1462 IOVA_MASK(resp->xhci_mem_info.xfer_buff.iova); 1463 uadev[card_num].info[info_idx].xfer_buf_dma = 1464 resp->xhci_mem_info.xfer_buff.dma; 1465 uadev[card_num].info[info_idx].xfer_buf_size = 1466 resp->xhci_mem_info.xfer_buff.size; 1467 uadev[card_num].info[info_idx].data_ep_pipe = subs->data_endpoint ? 1468 subs->data_endpoint->pipe : 0; 1469 uadev[card_num].info[info_idx].sync_ep_pipe = subs->sync_endpoint ? 1470 subs->sync_endpoint->pipe : 0; 1471 uadev[card_num].info[info_idx].data_ep_idx = subs->data_endpoint ? 1472 subs->data_endpoint->ep_num : 0; 1473 uadev[card_num].info[info_idx].sync_ep_idx = subs->sync_endpoint ? 1474 subs->sync_endpoint->ep_num : 0; 1475 uadev[card_num].info[info_idx].xfer_buf_cpu = xfer_buf_cpu; 1476 uadev[card_num].info[info_idx].pcm_card_num = card_num; 1477 uadev[card_num].info[info_idx].pcm_dev_num = pcm_dev_num; 1478 uadev[card_num].info[info_idx].direction = subs->direction; 1479 uadev[card_num].info[info_idx].intf_num = subs->cur_audiofmt->iface; 1480 uadev[card_num].info[info_idx].in_use = true; 1481 1482 set_bit(card_num, &uaudio_qdev->card_slot); 1483 1484 return 0; 1485 1486 unmap_er: 1487 uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, PAGE_SIZE); 1488 free_sec_ring: 1489 xhci_sideband_remove_interrupter(uadev[card_num].sb); 1490 drop_sync_ep: 1491 if (subs->sync_endpoint) { 1492 uaudio_iommu_unmap(MEM_XFER_RING, 1493 IOVA_MASK(resp->xhci_mem_info.tr_sync.iova), 1494 PAGE_SIZE, PAGE_SIZE); 1495 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1496 usb_pipe_endpoint(subs->dev, subs->sync_endpoint->pipe)); 1497 } 1498 drop_data_ep: 1499 uaudio_iommu_unmap(MEM_XFER_RING, IOVA_MASK(resp->xhci_mem_info.tr_data.iova), 1500 PAGE_SIZE, PAGE_SIZE); 1501 xhci_sideband_remove_endpoint(uadev[card_num].sb, 1502 usb_pipe_endpoint(subs->dev, subs->data_endpoint->pipe)); 1503 1504 return ret; 1505 } 1506 1507 /** 1508 * handle_uaudio_stream_req() - handle stream enable/disable request 1509 * @handle: QMI client handle 1510 * @sq: qrtr socket 1511 * @txn: QMI transaction context 1512 * @decoded_msg: decoded QMI message 1513 * 1514 * Main handler for the QMI stream enable/disable requests. This executes the 1515 * corresponding enable/disable stream apis, respectively. 1516 * 1517 */ 1518 static void handle_uaudio_stream_req(struct qmi_handle *handle, 1519 struct sockaddr_qrtr *sq, 1520 struct qmi_txn *txn, 1521 const void *decoded_msg) 1522 { 1523 struct qmi_uaudio_stream_req_msg_v01 *req_msg; 1524 struct qmi_uaudio_stream_resp_msg_v01 resp = {{0}, 0}; 1525 struct uaudio_qmi_svc *svc = uaudio_svc; 1526 struct snd_usb_audio *chip = NULL; 1527 struct snd_usb_substream *subs; 1528 struct usb_host_endpoint *ep; 1529 int datainterval = -EINVAL; 1530 int info_idx = -EINVAL; 1531 struct intf_info *info; 1532 u8 pcm_card_num; 1533 u8 pcm_dev_num; 1534 u8 direction; 1535 int ret = 0; 1536 1537 if (!svc->client_connected) { 1538 svc->client_sq = *sq; 1539 svc->client_connected = true; 1540 } 1541 1542 mutex_lock(&qdev_mutex); 1543 req_msg = (struct qmi_uaudio_stream_req_msg_v01 *)decoded_msg; 1544 if (!req_msg->audio_format_valid || !req_msg->bit_rate_valid || 1545 !req_msg->number_of_ch_valid || !req_msg->xfer_buff_size_valid) { 1546 ret = -EINVAL; 1547 goto response; 1548 } 1549 1550 if (!uaudio_qdev) { 1551 ret = -EINVAL; 1552 goto response; 1553 } 1554 1555 direction = (req_msg->usb_token & QMI_STREAM_REQ_DIRECTION); 1556 pcm_dev_num = (req_msg->usb_token & QMI_STREAM_REQ_DEV_NUM_MASK) >> 8; 1557 pcm_card_num = (req_msg->usb_token & QMI_STREAM_REQ_CARD_NUM_MASK) >> 16; 1558 if (pcm_card_num >= SNDRV_CARDS) { 1559 ret = -EINVAL; 1560 goto response; 1561 } 1562 1563 if (req_msg->audio_format > USB_QMI_PCM_FORMAT_U32_BE) { 1564 ret = -EINVAL; 1565 goto response; 1566 } 1567 1568 subs = find_substream(pcm_card_num, pcm_dev_num, direction); 1569 chip = uadev[pcm_card_num].chip; 1570 if (!subs || !chip || atomic_read(&chip->shutdown)) { 1571 ret = -ENODEV; 1572 goto response; 1573 } 1574 1575 info_idx = info_idx_from_ifnum(pcm_card_num, subs->cur_audiofmt ? 1576 subs->cur_audiofmt->iface : -1, req_msg->enable); 1577 if (atomic_read(&chip->shutdown) || !subs->stream || !subs->stream->pcm || 1578 !subs->stream->chip) { 1579 ret = -ENODEV; 1580 goto response; 1581 } 1582 1583 mutex_lock(&chip->mutex); 1584 if (req_msg->enable) { 1585 if (info_idx < 0 || chip->system_suspend || subs->opened) { 1586 ret = -EBUSY; 1587 mutex_unlock(&chip->mutex); 1588 1589 goto response; 1590 } 1591 subs->opened = 1; 1592 } 1593 mutex_unlock(&chip->mutex); 1594 1595 if (req_msg->service_interval_valid) { 1596 ret = get_data_interval_from_si(subs, 1597 req_msg->service_interval); 1598 if (ret == -EINVAL) 1599 goto response; 1600 1601 datainterval = ret; 1602 } 1603 1604 uadev[pcm_card_num].ctrl_intf = chip->ctrl_intf; 1605 1606 if (req_msg->enable) { 1607 ret = enable_audio_stream(subs, 1608 map_pcm_format(req_msg->audio_format), 1609 req_msg->number_of_ch, req_msg->bit_rate, 1610 datainterval); 1611 1612 if (!ret) 1613 ret = prepare_qmi_response(subs, req_msg, &resp, 1614 info_idx); 1615 if (ret < 0) { 1616 mutex_lock(&chip->mutex); 1617 subs->opened = 0; 1618 mutex_unlock(&chip->mutex); 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 mutex_lock(&chip->mutex); 1650 subs->opened = 0; 1651 mutex_unlock(&chip->mutex); 1652 } 1653 1654 response: 1655 if (!req_msg->enable && ret != -EINVAL && ret != -ENODEV) { 1656 mutex_lock(&chip->mutex); 1657 if (info_idx >= 0) { 1658 info = &uadev[pcm_card_num].info[info_idx]; 1659 uaudio_dev_intf_cleanup(uadev[pcm_card_num].udev, 1660 info); 1661 } 1662 if (atomic_read(&uadev[pcm_card_num].in_use)) 1663 kref_put(&uadev[pcm_card_num].kref, 1664 uaudio_dev_release); 1665 mutex_unlock(&chip->mutex); 1666 } 1667 mutex_unlock(&qdev_mutex); 1668 1669 resp.usb_token = req_msg->usb_token; 1670 resp.usb_token_valid = 1; 1671 resp.internal_status = ret; 1672 resp.internal_status_valid = 1; 1673 resp.status = ret ? USB_QMI_STREAM_REQ_FAILURE_V01 : ret; 1674 resp.status_valid = 1; 1675 ret = qmi_send_response(svc->uaudio_svc_hdl, sq, txn, 1676 QMI_UAUDIO_STREAM_RESP_V01, 1677 QMI_UAUDIO_STREAM_RESP_MSG_V01_MAX_MSG_LEN, 1678 qmi_uaudio_stream_resp_msg_v01_ei, &resp); 1679 } 1680 1681 static struct qmi_msg_handler uaudio_stream_req_handlers = { 1682 .type = QMI_REQUEST, 1683 .msg_id = QMI_UAUDIO_STREAM_REQ_V01, 1684 .ei = qmi_uaudio_stream_req_msg_v01_ei, 1685 .decoded_size = QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1686 .fn = handle_uaudio_stream_req, 1687 }; 1688 1689 /** 1690 * qc_usb_audio_offload_init_qmi_dev() - initializes qmi dev 1691 * 1692 * Initializes the USB qdev, which is used to carry information pertaining to 1693 * the offloading resources. This device is freed only when there are no longer 1694 * any offloading candidates. (i.e, when all audio devices are disconnected) 1695 * 1696 */ 1697 static int qc_usb_audio_offload_init_qmi_dev(void) 1698 { 1699 uaudio_qdev = kzalloc(sizeof(*uaudio_qdev), GFP_KERNEL); 1700 if (!uaudio_qdev) 1701 return -ENOMEM; 1702 1703 /* initialize xfer ring and xfer buf iova list */ 1704 INIT_LIST_HEAD(&uaudio_qdev->xfer_ring_list); 1705 uaudio_qdev->curr_xfer_ring_iova = IOVA_XFER_RING_BASE; 1706 uaudio_qdev->xfer_ring_iova_size = 1707 IOVA_XFER_RING_MAX - IOVA_XFER_RING_BASE; 1708 1709 INIT_LIST_HEAD(&uaudio_qdev->xfer_buf_list); 1710 uaudio_qdev->curr_xfer_buf_iova = IOVA_XFER_BUF_BASE; 1711 uaudio_qdev->xfer_buf_iova_size = 1712 IOVA_XFER_BUF_MAX - IOVA_XFER_BUF_BASE; 1713 1714 return 0; 1715 } 1716 1717 /* Populates ppcm_idx array with supported PCM indexes */ 1718 static int qc_usb_audio_offload_fill_avail_pcms(struct snd_usb_audio *chip, 1719 struct snd_soc_usb_device *sdev) 1720 { 1721 struct snd_usb_stream *as; 1722 struct snd_usb_substream *subs; 1723 int idx = 0; 1724 1725 list_for_each_entry(as, &chip->pcm_list, list) { 1726 subs = &as->substream[SNDRV_PCM_STREAM_PLAYBACK]; 1727 if (subs->ep_num) { 1728 sdev->ppcm_idx[idx] = as->pcm->device; 1729 idx++; 1730 } 1731 /* 1732 * Break if the current index exceeds the number of possible 1733 * playback streams counted from the UAC descriptors. 1734 */ 1735 if (idx >= sdev->num_playback) 1736 break; 1737 } 1738 1739 return -1; 1740 } 1741 1742 /** 1743 * qc_usb_audio_offload_probe() - platform op connect handler 1744 * @chip: USB SND device 1745 * 1746 * Platform connect handler when a USB SND device is detected. Will 1747 * notify SOC USB about the connection to enable the USB ASoC backend 1748 * and populate internal USB chip array. 1749 * 1750 */ 1751 static void qc_usb_audio_offload_probe(struct snd_usb_audio *chip) 1752 { 1753 struct usb_interface *intf = chip->intf[chip->num_interfaces - 1]; 1754 struct usb_interface_descriptor *altsd; 1755 struct usb_host_interface *alts; 1756 struct snd_soc_usb_device *sdev; 1757 struct xhci_sideband *sb; 1758 1759 /* 1760 * If there is no priv_data, or no playback paths, the connected 1761 * device doesn't support offloading. Avoid populating entries for 1762 * this device. 1763 */ 1764 if (!snd_soc_usb_find_priv_data(uaudio_qdev->auxdev->dev.parent) || 1765 !usb_qmi_get_pcm_num(chip, 0)) 1766 return; 1767 1768 mutex_lock(&qdev_mutex); 1769 mutex_lock(&chip->mutex); 1770 if (!uadev[chip->card->number].chip) { 1771 sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); 1772 if (!sdev) 1773 goto exit; 1774 1775 sb = xhci_sideband_register(intf, XHCI_SIDEBAND_VENDOR, 1776 uaudio_sideband_notifier); 1777 if (!sb) 1778 goto free_sdev; 1779 } else { 1780 sb = uadev[chip->card->number].sb; 1781 sdev = uadev[chip->card->number].sdev; 1782 } 1783 1784 uadev[chip->card->number].sb = sb; 1785 uadev[chip->card->number].chip = chip; 1786 uadev[chip->card->number].sdev = sdev; 1787 1788 alts = &intf->altsetting[0]; 1789 altsd = get_iface_desc(alts); 1790 1791 /* Wait until all PCM devices are populated before notifying soc-usb */ 1792 if (altsd->bInterfaceNumber == chip->last_iface) { 1793 sdev->num_playback = usb_qmi_get_pcm_num(chip, 0); 1794 1795 /* 1796 * Allocate playback pcm index array based on number of possible 1797 * playback paths within the UAC descriptors. 1798 */ 1799 sdev->ppcm_idx = kcalloc(sdev->num_playback, sizeof(unsigned int), 1800 GFP_KERNEL); 1801 if (!sdev->ppcm_idx) 1802 goto unreg_xhci; 1803 1804 qc_usb_audio_offload_fill_avail_pcms(chip, sdev); 1805 sdev->card_idx = chip->card->number; 1806 sdev->chip_idx = chip->index; 1807 1808 snd_usb_offload_create_ctl(chip, uaudio_qdev->auxdev->dev.parent); 1809 snd_soc_usb_connect(uaudio_qdev->auxdev->dev.parent, sdev); 1810 } 1811 1812 mutex_unlock(&chip->mutex); 1813 mutex_unlock(&qdev_mutex); 1814 1815 return; 1816 1817 unreg_xhci: 1818 xhci_sideband_unregister(sb); 1819 uadev[chip->card->number].sb = NULL; 1820 free_sdev: 1821 kfree(sdev); 1822 uadev[chip->card->number].sdev = NULL; 1823 uadev[chip->card->number].chip = NULL; 1824 exit: 1825 mutex_unlock(&chip->mutex); 1826 mutex_unlock(&qdev_mutex); 1827 } 1828 1829 /** 1830 * qc_usb_audio_cleanup_qmi_dev() - release qmi device 1831 * 1832 * Frees the USB qdev. Only occurs when there are no longer any potential 1833 * devices that can utilize USB audio offloading. 1834 * 1835 */ 1836 static void qc_usb_audio_cleanup_qmi_dev(void) 1837 { 1838 kfree(uaudio_qdev); 1839 uaudio_qdev = NULL; 1840 } 1841 1842 /** 1843 * qc_usb_audio_offload_disconnect() - platform op disconnect handler 1844 * @chip: USB SND device 1845 * 1846 * Platform disconnect handler. Will ensure that any pending stream is 1847 * halted by issuing a QMI disconnect indication packet to the adsp. 1848 * 1849 */ 1850 static void qc_usb_audio_offload_disconnect(struct snd_usb_audio *chip) 1851 { 1852 struct uaudio_dev *dev; 1853 int card_num; 1854 1855 if (!chip) 1856 return; 1857 1858 card_num = chip->card->number; 1859 if (card_num >= SNDRV_CARDS) 1860 return; 1861 1862 mutex_lock(&qdev_mutex); 1863 mutex_lock(&chip->mutex); 1864 dev = &uadev[card_num]; 1865 1866 /* Device has already been cleaned up, or never populated */ 1867 if (!dev->chip) { 1868 mutex_unlock(&qdev_mutex); 1869 mutex_unlock(&chip->mutex); 1870 return; 1871 } 1872 1873 /* cleaned up already */ 1874 if (!dev->udev) 1875 goto done; 1876 1877 uaudio_send_disconnect_ind(chip); 1878 uaudio_dev_cleanup(dev); 1879 done: 1880 /* 1881 * If num_interfaces == 1, the last USB SND interface is being removed. 1882 * This is to accommodate for devices w/ multiple UAC functions. 1883 */ 1884 if (chip->num_interfaces == 1) { 1885 snd_soc_usb_disconnect(uaudio_qdev->auxdev->dev.parent, dev->sdev); 1886 xhci_sideband_unregister(dev->sb); 1887 dev->chip = NULL; 1888 kfree(dev->sdev->ppcm_idx); 1889 kfree(dev->sdev); 1890 dev->sdev = NULL; 1891 } 1892 mutex_unlock(&chip->mutex); 1893 1894 mutex_unlock(&qdev_mutex); 1895 } 1896 1897 /** 1898 * qc_usb_audio_offload_suspend() - USB offload PM suspend handler 1899 * @intf: USB interface 1900 * @message: suspend type 1901 * 1902 * PM suspend handler to ensure that the USB offloading driver is able to stop 1903 * any pending traffic, so that the bus can be suspended. 1904 * 1905 */ 1906 static void qc_usb_audio_offload_suspend(struct usb_interface *intf, 1907 pm_message_t message) 1908 { 1909 struct snd_usb_audio *chip = usb_get_intfdata(intf); 1910 int card_num; 1911 1912 if (!chip) 1913 return; 1914 1915 card_num = chip->card->number; 1916 if (card_num >= SNDRV_CARDS) 1917 return; 1918 1919 mutex_lock(&qdev_mutex); 1920 mutex_lock(&chip->mutex); 1921 1922 uaudio_send_disconnect_ind(chip); 1923 1924 mutex_unlock(&qdev_mutex); 1925 mutex_unlock(&chip->mutex); 1926 } 1927 1928 static struct snd_usb_platform_ops offload_ops = { 1929 .connect_cb = qc_usb_audio_offload_probe, 1930 .disconnect_cb = qc_usb_audio_offload_disconnect, 1931 .suspend_cb = qc_usb_audio_offload_suspend, 1932 }; 1933 1934 static int qc_usb_audio_probe(struct auxiliary_device *auxdev, 1935 const struct auxiliary_device_id *id) 1936 1937 { 1938 struct uaudio_qmi_svc *svc; 1939 int ret; 1940 1941 svc = kzalloc(sizeof(*svc), GFP_KERNEL); 1942 if (!svc) 1943 return -ENOMEM; 1944 1945 svc->uaudio_svc_hdl = kzalloc(sizeof(*svc->uaudio_svc_hdl), GFP_KERNEL); 1946 if (!svc->uaudio_svc_hdl) { 1947 ret = -ENOMEM; 1948 goto free_svc; 1949 } 1950 1951 ret = qmi_handle_init(svc->uaudio_svc_hdl, 1952 QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, 1953 &uaudio_svc_ops_options, 1954 &uaudio_stream_req_handlers); 1955 ret = qmi_add_server(svc->uaudio_svc_hdl, UAUDIO_STREAM_SERVICE_ID_V01, 1956 UAUDIO_STREAM_SERVICE_VERS_V01, 0); 1957 1958 uaudio_svc = svc; 1959 1960 qc_usb_audio_offload_init_qmi_dev(); 1961 uaudio_qdev->auxdev = auxdev; 1962 1963 ret = snd_usb_register_platform_ops(&offload_ops); 1964 if (ret < 0) 1965 goto release_qmi; 1966 1967 snd_usb_rediscover_devices(); 1968 1969 return 0; 1970 1971 release_qmi: 1972 qc_usb_audio_cleanup_qmi_dev(); 1973 qmi_handle_release(svc->uaudio_svc_hdl); 1974 free_svc: 1975 kfree(svc); 1976 1977 return ret; 1978 } 1979 1980 static void qc_usb_audio_remove(struct auxiliary_device *auxdev) 1981 { 1982 struct uaudio_qmi_svc *svc = uaudio_svc; 1983 int idx; 1984 1985 /* 1986 * Remove all connected devices after unregistering ops, to ensure 1987 * that no further connect events will occur. The disconnect routine 1988 * will issue the QMI disconnect indication, which results in the 1989 * external DSP to stop issuing transfers. 1990 */ 1991 snd_usb_unregister_platform_ops(); 1992 for (idx = 0; idx < SNDRV_CARDS; idx++) 1993 qc_usb_audio_offload_disconnect(uadev[idx].chip); 1994 1995 qc_usb_audio_cleanup_qmi_dev(); 1996 1997 qmi_handle_release(svc->uaudio_svc_hdl); 1998 kfree(svc); 1999 uaudio_svc = NULL; 2000 } 2001 2002 static const struct auxiliary_device_id qc_usb_audio_table[] = { 2003 { .name = "q6usb.qc-usb-audio-offload" }, 2004 {}, 2005 }; 2006 MODULE_DEVICE_TABLE(auxiliary, qc_usb_audio_table); 2007 2008 static struct auxiliary_driver qc_usb_audio_offload_drv = { 2009 .name = "qc-usb-audio-offload", 2010 .id_table = qc_usb_audio_table, 2011 .probe = qc_usb_audio_probe, 2012 .remove = qc_usb_audio_remove, 2013 }; 2014 module_auxiliary_driver(qc_usb_audio_offload_drv); 2015 2016 MODULE_DESCRIPTION("QC USB Audio Offloading"); 2017 MODULE_LICENSE("GPL"); 2018