mixer.c 65 KB

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  1. /*
  2. * (Tentative) USB Audio Driver for ALSA
  3. *
  4. * Mixer control part
  5. *
  6. * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
  7. *
  8. * Many codes borrowed from audio.c by
  9. * Alan Cox (alan@lxorguk.ukuu.org.uk)
  10. * Thomas Sailer (sailer@ife.ee.ethz.ch)
  11. *
  12. *
  13. * This program is free software; you can redistribute it and/or modify
  14. * it under the terms of the GNU General Public License as published by
  15. * the Free Software Foundation; either version 2 of the License, or
  16. * (at your option) any later version.
  17. *
  18. * This program is distributed in the hope that it will be useful,
  19. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  21. * GNU General Public License for more details.
  22. *
  23. * You should have received a copy of the GNU General Public License
  24. * along with this program; if not, write to the Free Software
  25. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26. *
  27. */
  28. /*
  29. * TODOs, for both the mixer and the streaming interfaces:
  30. *
  31. * - support for UAC2 effect units
  32. * - support for graphical equalizers
  33. * - RANGE and MEM set commands (UAC2)
  34. * - RANGE and MEM interrupt dispatchers (UAC2)
  35. * - audio channel clustering (UAC2)
  36. * - audio sample rate converter units (UAC2)
  37. * - proper handling of clock multipliers (UAC2)
  38. * - dispatch clock change notifications (UAC2)
  39. * - stop PCM streams which use a clock that became invalid
  40. * - stop PCM streams which use a clock selector that has changed
  41. * - parse available sample rates again when clock sources changed
  42. */
  43. #include <linux/bitops.h>
  44. #include <linux/init.h>
  45. #include <linux/list.h>
  46. #include <linux/slab.h>
  47. #include <linux/string.h>
  48. #include <linux/usb.h>
  49. #include <linux/usb/audio.h>
  50. #include <linux/usb/audio-v2.h>
  51. #include <sound/core.h>
  52. #include <sound/control.h>
  53. #include <sound/hwdep.h>
  54. #include <sound/info.h>
  55. #include <sound/tlv.h>
  56. #include "usbaudio.h"
  57. #include "mixer.h"
  58. #include "helper.h"
  59. #include "mixer_quirks.h"
  60. #include "power.h"
  61. #define MAX_ID_ELEMS 256
  62. struct usb_audio_term {
  63. int id;
  64. int type;
  65. int channels;
  66. unsigned int chconfig;
  67. int name;
  68. };
  69. struct usbmix_name_map;
  70. struct mixer_build {
  71. struct snd_usb_audio *chip;
  72. struct usb_mixer_interface *mixer;
  73. unsigned char *buffer;
  74. unsigned int buflen;
  75. DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
  76. struct usb_audio_term oterm;
  77. const struct usbmix_name_map *map;
  78. const struct usbmix_selector_map *selector_map;
  79. };
  80. /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
  81. enum {
  82. USB_XU_CLOCK_RATE = 0xe301,
  83. USB_XU_CLOCK_SOURCE = 0xe302,
  84. USB_XU_DIGITAL_IO_STATUS = 0xe303,
  85. USB_XU_DEVICE_OPTIONS = 0xe304,
  86. USB_XU_DIRECT_MONITORING = 0xe305,
  87. USB_XU_METERING = 0xe306
  88. };
  89. enum {
  90. USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
  91. USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
  92. USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
  93. USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
  94. };
  95. /*
  96. * manual mapping of mixer names
  97. * if the mixer topology is too complicated and the parsed names are
  98. * ambiguous, add the entries in usbmixer_maps.c.
  99. */
  100. #include "mixer_maps.c"
  101. static const struct usbmix_name_map *
  102. find_map(struct mixer_build *state, int unitid, int control)
  103. {
  104. const struct usbmix_name_map *p = state->map;
  105. if (!p)
  106. return NULL;
  107. for (p = state->map; p->id; p++) {
  108. if (p->id == unitid &&
  109. (!control || !p->control || control == p->control))
  110. return p;
  111. }
  112. return NULL;
  113. }
  114. /* get the mapped name if the unit matches */
  115. static int
  116. check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
  117. {
  118. if (!p || !p->name)
  119. return 0;
  120. buflen--;
  121. return strlcpy(buf, p->name, buflen);
  122. }
  123. /* check whether the control should be ignored */
  124. static inline int
  125. check_ignored_ctl(const struct usbmix_name_map *p)
  126. {
  127. if (!p || p->name || p->dB)
  128. return 0;
  129. return 1;
  130. }
  131. /* dB mapping */
  132. static inline void check_mapped_dB(const struct usbmix_name_map *p,
  133. struct usb_mixer_elem_info *cval)
  134. {
  135. if (p && p->dB) {
  136. cval->dBmin = p->dB->min;
  137. cval->dBmax = p->dB->max;
  138. cval->initialized = 1;
  139. }
  140. }
  141. /* get the mapped selector source name */
  142. static int check_mapped_selector_name(struct mixer_build *state, int unitid,
  143. int index, char *buf, int buflen)
  144. {
  145. const struct usbmix_selector_map *p;
  146. if (! state->selector_map)
  147. return 0;
  148. for (p = state->selector_map; p->id; p++) {
  149. if (p->id == unitid && index < p->count)
  150. return strlcpy(buf, p->names[index], buflen);
  151. }
  152. return 0;
  153. }
  154. /*
  155. * find an audio control unit with the given unit id
  156. */
  157. static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit)
  158. {
  159. /* we just parse the header */
  160. struct uac_feature_unit_descriptor *hdr = NULL;
  161. while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
  162. USB_DT_CS_INTERFACE)) != NULL) {
  163. if (hdr->bLength >= 4 &&
  164. hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
  165. hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
  166. hdr->bUnitID == unit)
  167. return hdr;
  168. }
  169. return NULL;
  170. }
  171. /*
  172. * copy a string with the given id
  173. */
  174. static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen)
  175. {
  176. int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
  177. buf[len] = 0;
  178. return len;
  179. }
  180. /*
  181. * convert from the byte/word on usb descriptor to the zero-based integer
  182. */
  183. static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
  184. {
  185. switch (cval->val_type) {
  186. case USB_MIXER_BOOLEAN:
  187. return !!val;
  188. case USB_MIXER_INV_BOOLEAN:
  189. return !val;
  190. case USB_MIXER_U8:
  191. val &= 0xff;
  192. break;
  193. case USB_MIXER_S8:
  194. val &= 0xff;
  195. if (val >= 0x80)
  196. val -= 0x100;
  197. break;
  198. case USB_MIXER_U16:
  199. val &= 0xffff;
  200. break;
  201. case USB_MIXER_S16:
  202. val &= 0xffff;
  203. if (val >= 0x8000)
  204. val -= 0x10000;
  205. break;
  206. }
  207. return val;
  208. }
  209. /*
  210. * convert from the zero-based int to the byte/word for usb descriptor
  211. */
  212. static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
  213. {
  214. switch (cval->val_type) {
  215. case USB_MIXER_BOOLEAN:
  216. return !!val;
  217. case USB_MIXER_INV_BOOLEAN:
  218. return !val;
  219. case USB_MIXER_S8:
  220. case USB_MIXER_U8:
  221. return val & 0xff;
  222. case USB_MIXER_S16:
  223. case USB_MIXER_U16:
  224. return val & 0xffff;
  225. }
  226. return 0; /* not reached */
  227. }
  228. static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
  229. {
  230. if (! cval->res)
  231. cval->res = 1;
  232. if (val < cval->min)
  233. return 0;
  234. else if (val >= cval->max)
  235. return (cval->max - cval->min + cval->res - 1) / cval->res;
  236. else
  237. return (val - cval->min) / cval->res;
  238. }
  239. static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
  240. {
  241. if (val < 0)
  242. return cval->min;
  243. if (! cval->res)
  244. cval->res = 1;
  245. val *= cval->res;
  246. val += cval->min;
  247. if (val > cval->max)
  248. return cval->max;
  249. return val;
  250. }
  251. /*
  252. * retrieve a mixer value
  253. */
  254. static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
  255. {
  256. struct snd_usb_audio *chip = cval->mixer->chip;
  257. unsigned char buf[2];
  258. int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
  259. int timeout = 10;
  260. int idx = 0, err;
  261. err = snd_usb_autoresume(cval->mixer->chip);
  262. if (err < 0)
  263. return -EIO;
  264. down_read(&chip->shutdown_rwsem);
  265. while (timeout-- > 0) {
  266. if (chip->shutdown)
  267. break;
  268. idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
  269. if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
  270. USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
  271. validx, idx, buf, val_len) >= val_len) {
  272. *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
  273. err = 0;
  274. goto out;
  275. }
  276. }
  277. snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
  278. request, validx, idx, cval->val_type);
  279. err = -EINVAL;
  280. out:
  281. up_read(&chip->shutdown_rwsem);
  282. snd_usb_autosuspend(cval->mixer->chip);
  283. return err;
  284. }
  285. static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
  286. {
  287. struct snd_usb_audio *chip = cval->mixer->chip;
  288. unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */
  289. unsigned char *val;
  290. int idx = 0, ret, size;
  291. __u8 bRequest;
  292. if (request == UAC_GET_CUR) {
  293. bRequest = UAC2_CS_CUR;
  294. size = sizeof(__u16);
  295. } else {
  296. bRequest = UAC2_CS_RANGE;
  297. size = sizeof(buf);
  298. }
  299. memset(buf, 0, sizeof(buf));
  300. ret = snd_usb_autoresume(chip) ? -EIO : 0;
  301. if (ret)
  302. goto error;
  303. down_read(&chip->shutdown_rwsem);
  304. if (chip->shutdown)
  305. ret = -ENODEV;
  306. else {
  307. idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
  308. ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
  309. USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
  310. validx, idx, buf, size);
  311. }
  312. up_read(&chip->shutdown_rwsem);
  313. snd_usb_autosuspend(chip);
  314. if (ret < 0) {
  315. error:
  316. snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
  317. request, validx, idx, cval->val_type);
  318. return ret;
  319. }
  320. /* FIXME: how should we handle multiple triplets here? */
  321. switch (request) {
  322. case UAC_GET_CUR:
  323. val = buf;
  324. break;
  325. case UAC_GET_MIN:
  326. val = buf + sizeof(__u16);
  327. break;
  328. case UAC_GET_MAX:
  329. val = buf + sizeof(__u16) * 2;
  330. break;
  331. case UAC_GET_RES:
  332. val = buf + sizeof(__u16) * 3;
  333. break;
  334. default:
  335. return -EINVAL;
  336. }
  337. *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
  338. return 0;
  339. }
  340. static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret)
  341. {
  342. validx += cval->idx_off;
  343. return (cval->mixer->protocol == UAC_VERSION_1) ?
  344. get_ctl_value_v1(cval, request, validx, value_ret) :
  345. get_ctl_value_v2(cval, request, validx, value_ret);
  346. }
  347. static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value)
  348. {
  349. return get_ctl_value(cval, UAC_GET_CUR, validx, value);
  350. }
  351. /* channel = 0: master, 1 = first channel */
  352. static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
  353. int channel, int *value)
  354. {
  355. return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value);
  356. }
  357. static int get_cur_mix_value(struct usb_mixer_elem_info *cval,
  358. int channel, int index, int *value)
  359. {
  360. int err;
  361. if (cval->cached & (1 << channel)) {
  362. *value = cval->cache_val[index];
  363. return 0;
  364. }
  365. err = get_cur_mix_raw(cval, channel, value);
  366. if (err < 0) {
  367. if (!cval->mixer->ignore_ctl_error)
  368. snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n",
  369. cval->control, channel, err);
  370. return err;
  371. }
  372. cval->cached |= 1 << channel;
  373. cval->cache_val[index] = *value;
  374. return 0;
  375. }
  376. /*
  377. * set a mixer value
  378. */
  379. int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
  380. int request, int validx, int value_set)
  381. {
  382. struct snd_usb_audio *chip = cval->mixer->chip;
  383. unsigned char buf[2];
  384. int idx = 0, val_len, err, timeout = 10;
  385. validx += cval->idx_off;
  386. if (cval->mixer->protocol == UAC_VERSION_1) {
  387. val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
  388. } else { /* UAC_VERSION_2 */
  389. /* audio class v2 controls are always 2 bytes in size */
  390. val_len = sizeof(__u16);
  391. /* FIXME */
  392. if (request != UAC_SET_CUR) {
  393. snd_printdd(KERN_WARNING "RANGE setting not yet supported\n");
  394. return -EINVAL;
  395. }
  396. request = UAC2_CS_CUR;
  397. }
  398. value_set = convert_bytes_value(cval, value_set);
  399. buf[0] = value_set & 0xff;
  400. buf[1] = (value_set >> 8) & 0xff;
  401. err = snd_usb_autoresume(chip);
  402. if (err < 0)
  403. return -EIO;
  404. down_read(&chip->shutdown_rwsem);
  405. while (timeout-- > 0) {
  406. if (chip->shutdown)
  407. break;
  408. idx = snd_usb_ctrl_intf(chip) | (cval->id << 8);
  409. if (snd_usb_ctl_msg(chip->dev,
  410. usb_sndctrlpipe(chip->dev, 0), request,
  411. USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
  412. validx, idx, buf, val_len) >= 0) {
  413. err = 0;
  414. goto out;
  415. }
  416. }
  417. snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
  418. request, validx, idx, cval->val_type, buf[0], buf[1]);
  419. err = -EINVAL;
  420. out:
  421. up_read(&chip->shutdown_rwsem);
  422. snd_usb_autosuspend(chip);
  423. return err;
  424. }
  425. static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value)
  426. {
  427. return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
  428. }
  429. static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
  430. int index, int value)
  431. {
  432. int err;
  433. unsigned int read_only = (channel == 0) ?
  434. cval->master_readonly :
  435. cval->ch_readonly & (1 << (channel - 1));
  436. if (read_only) {
  437. snd_printdd(KERN_INFO "%s(): channel %d of control %d is read_only\n",
  438. __func__, channel, cval->control);
  439. return 0;
  440. }
  441. err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel,
  442. value);
  443. if (err < 0)
  444. return err;
  445. cval->cached |= 1 << channel;
  446. cval->cache_val[index] = value;
  447. return 0;
  448. }
  449. /*
  450. * TLV callback for mixer volume controls
  451. */
  452. int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
  453. unsigned int size, unsigned int __user *_tlv)
  454. {
  455. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  456. DECLARE_TLV_DB_MINMAX(scale, 0, 0);
  457. if (size < sizeof(scale))
  458. return -ENOMEM;
  459. scale[2] = cval->dBmin;
  460. scale[3] = cval->dBmax;
  461. if (copy_to_user(_tlv, scale, sizeof(scale)))
  462. return -EFAULT;
  463. return 0;
  464. }
  465. /*
  466. * parser routines begin here...
  467. */
  468. static int parse_audio_unit(struct mixer_build *state, int unitid);
  469. /*
  470. * check if the input/output channel routing is enabled on the given bitmap.
  471. * used for mixer unit parser
  472. */
  473. static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs)
  474. {
  475. int idx = ich * num_outs + och;
  476. return bmap[idx >> 3] & (0x80 >> (idx & 7));
  477. }
  478. /*
  479. * add an alsa control element
  480. * search and increment the index until an empty slot is found.
  481. *
  482. * if failed, give up and free the control instance.
  483. */
  484. int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer,
  485. struct snd_kcontrol *kctl)
  486. {
  487. struct usb_mixer_elem_info *cval = kctl->private_data;
  488. int err;
  489. while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
  490. kctl->id.index++;
  491. if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
  492. snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
  493. return err;
  494. }
  495. cval->elem_id = &kctl->id;
  496. cval->next_id_elem = mixer->id_elems[cval->id];
  497. mixer->id_elems[cval->id] = cval;
  498. return 0;
  499. }
  500. /*
  501. * get a terminal name string
  502. */
  503. static struct iterm_name_combo {
  504. int type;
  505. char *name;
  506. } iterm_names[] = {
  507. { 0x0300, "Output" },
  508. { 0x0301, "Speaker" },
  509. { 0x0302, "Headphone" },
  510. { 0x0303, "HMD Audio" },
  511. { 0x0304, "Desktop Speaker" },
  512. { 0x0305, "Room Speaker" },
  513. { 0x0306, "Com Speaker" },
  514. { 0x0307, "LFE" },
  515. { 0x0600, "External In" },
  516. { 0x0601, "Analog In" },
  517. { 0x0602, "Digital In" },
  518. { 0x0603, "Line" },
  519. { 0x0604, "Legacy In" },
  520. { 0x0605, "IEC958 In" },
  521. { 0x0606, "1394 DA Stream" },
  522. { 0x0607, "1394 DV Stream" },
  523. { 0x0700, "Embedded" },
  524. { 0x0701, "Noise Source" },
  525. { 0x0702, "Equalization Noise" },
  526. { 0x0703, "CD" },
  527. { 0x0704, "DAT" },
  528. { 0x0705, "DCC" },
  529. { 0x0706, "MiniDisk" },
  530. { 0x0707, "Analog Tape" },
  531. { 0x0708, "Phonograph" },
  532. { 0x0709, "VCR Audio" },
  533. { 0x070a, "Video Disk Audio" },
  534. { 0x070b, "DVD Audio" },
  535. { 0x070c, "TV Tuner Audio" },
  536. { 0x070d, "Satellite Rec Audio" },
  537. { 0x070e, "Cable Tuner Audio" },
  538. { 0x070f, "DSS Audio" },
  539. { 0x0710, "Radio Receiver" },
  540. { 0x0711, "Radio Transmitter" },
  541. { 0x0712, "Multi-Track Recorder" },
  542. { 0x0713, "Synthesizer" },
  543. { 0 },
  544. };
  545. static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
  546. unsigned char *name, int maxlen, int term_only)
  547. {
  548. struct iterm_name_combo *names;
  549. if (iterm->name)
  550. return snd_usb_copy_string_desc(state, iterm->name, name, maxlen);
  551. /* virtual type - not a real terminal */
  552. if (iterm->type >> 16) {
  553. if (term_only)
  554. return 0;
  555. switch (iterm->type >> 16) {
  556. case UAC_SELECTOR_UNIT:
  557. strcpy(name, "Selector"); return 8;
  558. case UAC1_PROCESSING_UNIT:
  559. strcpy(name, "Process Unit"); return 12;
  560. case UAC1_EXTENSION_UNIT:
  561. strcpy(name, "Ext Unit"); return 8;
  562. case UAC_MIXER_UNIT:
  563. strcpy(name, "Mixer"); return 5;
  564. default:
  565. return sprintf(name, "Unit %d", iterm->id);
  566. }
  567. }
  568. switch (iterm->type & 0xff00) {
  569. case 0x0100:
  570. strcpy(name, "PCM"); return 3;
  571. case 0x0200:
  572. strcpy(name, "Mic"); return 3;
  573. case 0x0400:
  574. strcpy(name, "Headset"); return 7;
  575. case 0x0500:
  576. strcpy(name, "Phone"); return 5;
  577. }
  578. for (names = iterm_names; names->type; names++)
  579. if (names->type == iterm->type) {
  580. strcpy(name, names->name);
  581. return strlen(names->name);
  582. }
  583. return 0;
  584. }
  585. /*
  586. * parse the source unit recursively until it reaches to a terminal
  587. * or a branched unit.
  588. */
  589. static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term)
  590. {
  591. int err;
  592. void *p1;
  593. memset(term, 0, sizeof(*term));
  594. while ((p1 = find_audio_control_unit(state, id)) != NULL) {
  595. unsigned char *hdr = p1;
  596. term->id = id;
  597. switch (hdr[2]) {
  598. case UAC_INPUT_TERMINAL:
  599. if (state->mixer->protocol == UAC_VERSION_1) {
  600. struct uac_input_terminal_descriptor *d = p1;
  601. term->type = le16_to_cpu(d->wTerminalType);
  602. term->channels = d->bNrChannels;
  603. term->chconfig = le16_to_cpu(d->wChannelConfig);
  604. term->name = d->iTerminal;
  605. } else { /* UAC_VERSION_2 */
  606. struct uac2_input_terminal_descriptor *d = p1;
  607. term->type = le16_to_cpu(d->wTerminalType);
  608. term->channels = d->bNrChannels;
  609. term->chconfig = le32_to_cpu(d->bmChannelConfig);
  610. term->name = d->iTerminal;
  611. /* call recursively to get the clock selectors */
  612. err = check_input_term(state, d->bCSourceID, term);
  613. if (err < 0)
  614. return err;
  615. }
  616. return 0;
  617. case UAC_FEATURE_UNIT: {
  618. /* the header is the same for v1 and v2 */
  619. struct uac_feature_unit_descriptor *d = p1;
  620. id = d->bSourceID;
  621. break; /* continue to parse */
  622. }
  623. case UAC_MIXER_UNIT: {
  624. struct uac_mixer_unit_descriptor *d = p1;
  625. term->type = d->bDescriptorSubtype << 16; /* virtual type */
  626. term->channels = uac_mixer_unit_bNrChannels(d);
  627. term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
  628. term->name = uac_mixer_unit_iMixer(d);
  629. return 0;
  630. }
  631. case UAC_SELECTOR_UNIT:
  632. case UAC2_CLOCK_SELECTOR: {
  633. struct uac_selector_unit_descriptor *d = p1;
  634. /* call recursively to retrieve the channel info */
  635. err = check_input_term(state, d->baSourceID[0], term);
  636. if (err < 0)
  637. return err;
  638. term->type = d->bDescriptorSubtype << 16; /* virtual type */
  639. term->id = id;
  640. term->name = uac_selector_unit_iSelector(d);
  641. return 0;
  642. }
  643. case UAC1_PROCESSING_UNIT:
  644. case UAC1_EXTENSION_UNIT:
  645. /* UAC2_PROCESSING_UNIT_V2 */
  646. /* UAC2_EFFECT_UNIT */
  647. case UAC2_EXTENSION_UNIT_V2: {
  648. struct uac_processing_unit_descriptor *d = p1;
  649. if (state->mixer->protocol == UAC_VERSION_2 &&
  650. hdr[2] == UAC2_EFFECT_UNIT) {
  651. /* UAC2/UAC1 unit IDs overlap here in an
  652. * uncompatible way. Ignore this unit for now.
  653. */
  654. return 0;
  655. }
  656. if (d->bNrInPins) {
  657. id = d->baSourceID[0];
  658. break; /* continue to parse */
  659. }
  660. term->type = d->bDescriptorSubtype << 16; /* virtual type */
  661. term->channels = uac_processing_unit_bNrChannels(d);
  662. term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
  663. term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
  664. return 0;
  665. }
  666. case UAC2_CLOCK_SOURCE: {
  667. struct uac_clock_source_descriptor *d = p1;
  668. term->type = d->bDescriptorSubtype << 16; /* virtual type */
  669. term->id = id;
  670. term->name = d->iClockSource;
  671. return 0;
  672. }
  673. default:
  674. return -ENODEV;
  675. }
  676. }
  677. return -ENODEV;
  678. }
  679. /*
  680. * Feature Unit
  681. */
  682. /* feature unit control information */
  683. struct usb_feature_control_info {
  684. const char *name;
  685. unsigned int type; /* control type (mute, volume, etc.) */
  686. };
  687. static struct usb_feature_control_info audio_feature_info[] = {
  688. { "Mute", USB_MIXER_INV_BOOLEAN },
  689. { "Volume", USB_MIXER_S16 },
  690. { "Tone Control - Bass", USB_MIXER_S8 },
  691. { "Tone Control - Mid", USB_MIXER_S8 },
  692. { "Tone Control - Treble", USB_MIXER_S8 },
  693. { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
  694. { "Auto Gain Control", USB_MIXER_BOOLEAN },
  695. { "Delay Control", USB_MIXER_U16 },
  696. { "Bass Boost", USB_MIXER_BOOLEAN },
  697. { "Loudness", USB_MIXER_BOOLEAN },
  698. /* UAC2 specific */
  699. { "Input Gain Control", USB_MIXER_U16 },
  700. { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
  701. { "Phase Inverter Control", USB_MIXER_BOOLEAN },
  702. };
  703. /* private_free callback */
  704. static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
  705. {
  706. kfree(kctl->private_data);
  707. kctl->private_data = NULL;
  708. }
  709. /*
  710. * interface to ALSA control for feature/mixer units
  711. */
  712. /* volume control quirks */
  713. static void volume_control_quirks(struct usb_mixer_elem_info *cval,
  714. struct snd_kcontrol *kctl)
  715. {
  716. switch (cval->mixer->chip->usb_id) {
  717. case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
  718. case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
  719. if (strcmp(kctl->id.name, "Effect Duration") == 0) {
  720. cval->min = 0x0000;
  721. cval->max = 0xffff;
  722. cval->res = 0x00e6;
  723. break;
  724. }
  725. if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
  726. strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
  727. cval->min = 0x00;
  728. cval->max = 0xff;
  729. break;
  730. }
  731. if (strstr(kctl->id.name, "Effect Return") != NULL) {
  732. cval->min = 0xb706;
  733. cval->max = 0xff7b;
  734. cval->res = 0x0073;
  735. break;
  736. }
  737. if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
  738. (strstr(kctl->id.name, "Effect Send") != NULL)) {
  739. cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
  740. cval->max = 0xfcfe;
  741. cval->res = 0x0073;
  742. }
  743. break;
  744. case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
  745. case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
  746. if (strcmp(kctl->id.name, "Effect Duration") == 0) {
  747. snd_printk(KERN_INFO
  748. "usb-audio: set quirk for FTU Effect Duration\n");
  749. cval->min = 0x0000;
  750. cval->max = 0x7f00;
  751. cval->res = 0x0100;
  752. break;
  753. }
  754. if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
  755. strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
  756. snd_printk(KERN_INFO
  757. "usb-audio: set quirks for FTU Effect Feedback/Volume\n");
  758. cval->min = 0x00;
  759. cval->max = 0x7f;
  760. break;
  761. }
  762. break;
  763. case USB_ID(0x0471, 0x0101):
  764. case USB_ID(0x0471, 0x0104):
  765. case USB_ID(0x0471, 0x0105):
  766. case USB_ID(0x0672, 0x1041):
  767. /* quirk for UDA1321/N101.
  768. * note that detection between firmware 2.1.1.7 (N101)
  769. * and later 2.1.1.21 is not very clear from datasheets.
  770. * I hope that the min value is -15360 for newer firmware --jk
  771. */
  772. if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
  773. cval->min == -15616) {
  774. snd_printk(KERN_INFO
  775. "set volume quirk for UDA1321/N101 chip\n");
  776. cval->max = -256;
  777. }
  778. break;
  779. case USB_ID(0x046d, 0x09a4):
  780. if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
  781. snd_printk(KERN_INFO
  782. "set volume quirk for QuickCam E3500\n");
  783. cval->min = 6080;
  784. cval->max = 8768;
  785. cval->res = 192;
  786. }
  787. break;
  788. case USB_ID(0x046d, 0x0808):
  789. case USB_ID(0x046d, 0x0809):
  790. case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
  791. case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
  792. case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
  793. case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
  794. case USB_ID(0x046d, 0x0991):
  795. /* Most audio usb devices lie about volume resolution.
  796. * Most Logitech webcams have res = 384.
  797. * Proboly there is some logitech magic behind this number --fishor
  798. */
  799. if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
  800. snd_printk(KERN_INFO
  801. "set resolution quirk: cval->res = 384\n");
  802. cval->res = 384;
  803. }
  804. break;
  805. }
  806. }
  807. /*
  808. * retrieve the minimum and maximum values for the specified control
  809. */
  810. static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
  811. int default_min, struct snd_kcontrol *kctl)
  812. {
  813. /* for failsafe */
  814. cval->min = default_min;
  815. cval->max = cval->min + 1;
  816. cval->res = 1;
  817. cval->dBmin = cval->dBmax = 0;
  818. if (cval->val_type == USB_MIXER_BOOLEAN ||
  819. cval->val_type == USB_MIXER_INV_BOOLEAN) {
  820. cval->initialized = 1;
  821. } else {
  822. int minchn = 0;
  823. if (cval->cmask) {
  824. int i;
  825. for (i = 0; i < MAX_CHANNELS; i++)
  826. if (cval->cmask & (1 << i)) {
  827. minchn = i + 1;
  828. break;
  829. }
  830. }
  831. if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
  832. get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
  833. snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n",
  834. cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id);
  835. return -EINVAL;
  836. }
  837. if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) {
  838. cval->res = 1;
  839. } else {
  840. int last_valid_res = cval->res;
  841. while (cval->res > 1) {
  842. if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
  843. (cval->control << 8) | minchn, cval->res / 2) < 0)
  844. break;
  845. cval->res /= 2;
  846. }
  847. if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0)
  848. cval->res = last_valid_res;
  849. }
  850. if (cval->res == 0)
  851. cval->res = 1;
  852. /* Additional checks for the proper resolution
  853. *
  854. * Some devices report smaller resolutions than actually
  855. * reacting. They don't return errors but simply clip
  856. * to the lower aligned value.
  857. */
  858. if (cval->min + cval->res < cval->max) {
  859. int last_valid_res = cval->res;
  860. int saved, test, check;
  861. get_cur_mix_raw(cval, minchn, &saved);
  862. for (;;) {
  863. test = saved;
  864. if (test < cval->max)
  865. test += cval->res;
  866. else
  867. test -= cval->res;
  868. if (test < cval->min || test > cval->max ||
  869. set_cur_mix_value(cval, minchn, 0, test) ||
  870. get_cur_mix_raw(cval, minchn, &check)) {
  871. cval->res = last_valid_res;
  872. break;
  873. }
  874. if (test == check)
  875. break;
  876. cval->res *= 2;
  877. }
  878. set_cur_mix_value(cval, minchn, 0, saved);
  879. }
  880. cval->initialized = 1;
  881. }
  882. if (kctl)
  883. volume_control_quirks(cval, kctl);
  884. /* USB descriptions contain the dB scale in 1/256 dB unit
  885. * while ALSA TLV contains in 1/100 dB unit
  886. */
  887. cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
  888. cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
  889. if (cval->dBmin > cval->dBmax) {
  890. /* something is wrong; assume it's either from/to 0dB */
  891. if (cval->dBmin < 0)
  892. cval->dBmax = 0;
  893. else if (cval->dBmin > 0)
  894. cval->dBmin = 0;
  895. if (cval->dBmin > cval->dBmax) {
  896. /* totally crap, return an error */
  897. return -EINVAL;
  898. }
  899. }
  900. return 0;
  901. }
  902. #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
  903. /* get a feature/mixer unit info */
  904. static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
  905. {
  906. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  907. if (cval->val_type == USB_MIXER_BOOLEAN ||
  908. cval->val_type == USB_MIXER_INV_BOOLEAN)
  909. uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  910. else
  911. uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  912. uinfo->count = cval->channels;
  913. if (cval->val_type == USB_MIXER_BOOLEAN ||
  914. cval->val_type == USB_MIXER_INV_BOOLEAN) {
  915. uinfo->value.integer.min = 0;
  916. uinfo->value.integer.max = 1;
  917. } else {
  918. if (!cval->initialized) {
  919. get_min_max_with_quirks(cval, 0, kcontrol);
  920. if (cval->initialized && cval->dBmin >= cval->dBmax) {
  921. kcontrol->vd[0].access &=
  922. ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
  923. SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
  924. snd_ctl_notify(cval->mixer->chip->card,
  925. SNDRV_CTL_EVENT_MASK_INFO,
  926. &kcontrol->id);
  927. }
  928. }
  929. uinfo->value.integer.min = 0;
  930. uinfo->value.integer.max =
  931. (cval->max - cval->min + cval->res - 1) / cval->res;
  932. }
  933. return 0;
  934. }
  935. /* get the current value from feature/mixer unit */
  936. static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  937. {
  938. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  939. int c, cnt, val, err;
  940. ucontrol->value.integer.value[0] = cval->min;
  941. if (cval->cmask) {
  942. cnt = 0;
  943. for (c = 0; c < MAX_CHANNELS; c++) {
  944. if (!(cval->cmask & (1 << c)))
  945. continue;
  946. err = get_cur_mix_value(cval, c + 1, cnt, &val);
  947. if (err < 0)
  948. return cval->mixer->ignore_ctl_error ? 0 : err;
  949. val = get_relative_value(cval, val);
  950. ucontrol->value.integer.value[cnt] = val;
  951. cnt++;
  952. }
  953. return 0;
  954. } else {
  955. /* master channel */
  956. err = get_cur_mix_value(cval, 0, 0, &val);
  957. if (err < 0)
  958. return cval->mixer->ignore_ctl_error ? 0 : err;
  959. val = get_relative_value(cval, val);
  960. ucontrol->value.integer.value[0] = val;
  961. }
  962. return 0;
  963. }
  964. /* put the current value to feature/mixer unit */
  965. static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  966. {
  967. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  968. int c, cnt, val, oval, err;
  969. int changed = 0;
  970. if (cval->cmask) {
  971. cnt = 0;
  972. for (c = 0; c < MAX_CHANNELS; c++) {
  973. if (!(cval->cmask & (1 << c)))
  974. continue;
  975. err = get_cur_mix_value(cval, c + 1, cnt, &oval);
  976. if (err < 0)
  977. return cval->mixer->ignore_ctl_error ? 0 : err;
  978. val = ucontrol->value.integer.value[cnt];
  979. val = get_abs_value(cval, val);
  980. if (oval != val) {
  981. set_cur_mix_value(cval, c + 1, cnt, val);
  982. changed = 1;
  983. }
  984. cnt++;
  985. }
  986. } else {
  987. /* master channel */
  988. err = get_cur_mix_value(cval, 0, 0, &oval);
  989. if (err < 0)
  990. return cval->mixer->ignore_ctl_error ? 0 : err;
  991. val = ucontrol->value.integer.value[0];
  992. val = get_abs_value(cval, val);
  993. if (val != oval) {
  994. set_cur_mix_value(cval, 0, 0, val);
  995. changed = 1;
  996. }
  997. }
  998. return changed;
  999. }
  1000. static struct snd_kcontrol_new usb_feature_unit_ctl = {
  1001. .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  1002. .name = "", /* will be filled later manually */
  1003. .info = mixer_ctl_feature_info,
  1004. .get = mixer_ctl_feature_get,
  1005. .put = mixer_ctl_feature_put,
  1006. };
  1007. /* the read-only variant */
  1008. static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
  1009. .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  1010. .name = "", /* will be filled later manually */
  1011. .info = mixer_ctl_feature_info,
  1012. .get = mixer_ctl_feature_get,
  1013. .put = NULL,
  1014. };
  1015. /* This symbol is exported in order to allow the mixer quirks to
  1016. * hook up to the standard feature unit control mechanism */
  1017. struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
  1018. /*
  1019. * build a feature control
  1020. */
  1021. static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
  1022. {
  1023. return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
  1024. }
  1025. /* A lot of headsets/headphones have a "Speaker" mixer. Make sure we
  1026. rename it to "Headphone". We determine if something is a headphone
  1027. similar to how udev determines form factor. */
  1028. static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
  1029. struct snd_card *card)
  1030. {
  1031. const char *names_to_check[] = {
  1032. "Headset", "headset", "Headphone", "headphone", NULL};
  1033. const char **s;
  1034. bool found = false;
  1035. if (strcmp("Speaker", kctl->id.name))
  1036. return;
  1037. for (s = names_to_check; *s; s++)
  1038. if (strstr(card->shortname, *s)) {
  1039. found = true;
  1040. break;
  1041. }
  1042. if (!found)
  1043. return;
  1044. strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
  1045. }
  1046. static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
  1047. unsigned int ctl_mask, int control,
  1048. struct usb_audio_term *iterm, int unitid,
  1049. int readonly_mask)
  1050. {
  1051. struct uac_feature_unit_descriptor *desc = raw_desc;
  1052. unsigned int len = 0;
  1053. int mapped_name = 0;
  1054. int nameid = uac_feature_unit_iFeature(desc);
  1055. struct snd_kcontrol *kctl;
  1056. struct usb_mixer_elem_info *cval;
  1057. const struct usbmix_name_map *map;
  1058. unsigned int range;
  1059. control++; /* change from zero-based to 1-based value */
  1060. if (control == UAC_FU_GRAPHIC_EQUALIZER) {
  1061. /* FIXME: not supported yet */
  1062. return;
  1063. }
  1064. map = find_map(state, unitid, control);
  1065. if (check_ignored_ctl(map))
  1066. return;
  1067. cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  1068. if (! cval) {
  1069. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1070. return;
  1071. }
  1072. cval->mixer = state->mixer;
  1073. cval->id = unitid;
  1074. cval->control = control;
  1075. cval->cmask = ctl_mask;
  1076. cval->val_type = audio_feature_info[control-1].type;
  1077. if (ctl_mask == 0) {
  1078. cval->channels = 1; /* master channel */
  1079. cval->master_readonly = readonly_mask;
  1080. } else {
  1081. int i, c = 0;
  1082. for (i = 0; i < 16; i++)
  1083. if (ctl_mask & (1 << i))
  1084. c++;
  1085. cval->channels = c;
  1086. cval->ch_readonly = readonly_mask;
  1087. }
  1088. /* if all channels in the mask are marked read-only, make the control
  1089. * read-only. set_cur_mix_value() will check the mask again and won't
  1090. * issue write commands to read-only channels. */
  1091. if (cval->channels == readonly_mask)
  1092. kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
  1093. else
  1094. kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
  1095. if (! kctl) {
  1096. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1097. kfree(cval);
  1098. return;
  1099. }
  1100. kctl->private_free = usb_mixer_elem_free;
  1101. len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
  1102. mapped_name = len != 0;
  1103. if (! len && nameid)
  1104. len = snd_usb_copy_string_desc(state, nameid,
  1105. kctl->id.name, sizeof(kctl->id.name));
  1106. switch (control) {
  1107. case UAC_FU_MUTE:
  1108. case UAC_FU_VOLUME:
  1109. /* determine the control name. the rule is:
  1110. * - if a name id is given in descriptor, use it.
  1111. * - if the connected input can be determined, then use the name
  1112. * of terminal type.
  1113. * - if the connected output can be determined, use it.
  1114. * - otherwise, anonymous name.
  1115. */
  1116. if (! len) {
  1117. len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1);
  1118. if (! len)
  1119. len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1);
  1120. if (! len)
  1121. len = snprintf(kctl->id.name, sizeof(kctl->id.name),
  1122. "Feature %d", unitid);
  1123. }
  1124. if (!mapped_name)
  1125. check_no_speaker_on_headset(kctl, state->mixer->chip->card);
  1126. /* determine the stream direction:
  1127. * if the connected output is USB stream, then it's likely a
  1128. * capture stream. otherwise it should be playback (hopefully :)
  1129. */
  1130. if (! mapped_name && ! (state->oterm.type >> 16)) {
  1131. if ((state->oterm.type & 0xff00) == 0x0100) {
  1132. len = append_ctl_name(kctl, " Capture");
  1133. } else {
  1134. len = append_ctl_name(kctl, " Playback");
  1135. }
  1136. }
  1137. append_ctl_name(kctl, control == UAC_FU_MUTE ?
  1138. " Switch" : " Volume");
  1139. break;
  1140. default:
  1141. if (! len)
  1142. strlcpy(kctl->id.name, audio_feature_info[control-1].name,
  1143. sizeof(kctl->id.name));
  1144. break;
  1145. }
  1146. /* get min/max values */
  1147. get_min_max_with_quirks(cval, 0, kctl);
  1148. if (control == UAC_FU_VOLUME) {
  1149. check_mapped_dB(map, cval);
  1150. if (cval->dBmin < cval->dBmax || !cval->initialized) {
  1151. kctl->tlv.c = snd_usb_mixer_vol_tlv;
  1152. kctl->vd[0].access |=
  1153. SNDRV_CTL_ELEM_ACCESS_TLV_READ |
  1154. SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
  1155. }
  1156. }
  1157. range = (cval->max - cval->min) / cval->res;
  1158. /* Are there devices with volume range more than 255? I use a bit more
  1159. * to be sure. 384 is a resolution magic number found on Logitech
  1160. * devices. It will definitively catch all buggy Logitech devices.
  1161. */
  1162. if (range > 384) {
  1163. snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big "
  1164. "volume range (=%u), cval->res is probably wrong.",
  1165. range);
  1166. snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, "
  1167. "val = %d/%d/%d", cval->id,
  1168. kctl->id.name, cval->channels,
  1169. cval->min, cval->max, cval->res);
  1170. }
  1171. snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
  1172. cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res);
  1173. snd_usb_mixer_add_control(state->mixer, kctl);
  1174. }
  1175. /*
  1176. * parse a feature unit
  1177. *
  1178. * most of controls are defined here.
  1179. */
  1180. static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr)
  1181. {
  1182. int channels, i, j;
  1183. struct usb_audio_term iterm;
  1184. unsigned int master_bits, first_ch_bits;
  1185. int err, csize;
  1186. struct uac_feature_unit_descriptor *hdr = _ftr;
  1187. __u8 *bmaControls;
  1188. if (state->mixer->protocol == UAC_VERSION_1) {
  1189. csize = hdr->bControlSize;
  1190. if (!csize) {
  1191. snd_printdd(KERN_ERR "usbaudio: unit %u: "
  1192. "invalid bControlSize == 0\n", unitid);
  1193. return -EINVAL;
  1194. }
  1195. channels = (hdr->bLength - 7) / csize - 1;
  1196. bmaControls = hdr->bmaControls;
  1197. if (hdr->bLength < 7 + csize) {
  1198. snd_printk(KERN_ERR "usbaudio: unit %u: "
  1199. "invalid UAC_FEATURE_UNIT descriptor\n",
  1200. unitid);
  1201. return -EINVAL;
  1202. }
  1203. } else {
  1204. struct uac2_feature_unit_descriptor *ftr = _ftr;
  1205. csize = 4;
  1206. channels = (hdr->bLength - 6) / 4 - 1;
  1207. bmaControls = ftr->bmaControls;
  1208. if (hdr->bLength < 6 + csize) {
  1209. snd_printk(KERN_ERR "usbaudio: unit %u: "
  1210. "invalid UAC_FEATURE_UNIT descriptor\n",
  1211. unitid);
  1212. return -EINVAL;
  1213. }
  1214. }
  1215. /* parse the source unit */
  1216. if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
  1217. return err;
  1218. /* determine the input source type and name */
  1219. err = check_input_term(state, hdr->bSourceID, &iterm);
  1220. if (err < 0)
  1221. return err;
  1222. master_bits = snd_usb_combine_bytes(bmaControls, csize);
  1223. /* master configuration quirks */
  1224. switch (state->chip->usb_id) {
  1225. case USB_ID(0x08bb, 0x2702):
  1226. snd_printk(KERN_INFO
  1227. "usbmixer: master volume quirk for PCM2702 chip\n");
  1228. /* disable non-functional volume control */
  1229. master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
  1230. break;
  1231. case USB_ID(0x1130, 0xf211):
  1232. snd_printk(KERN_INFO
  1233. "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
  1234. /* disable non-functional volume control */
  1235. channels = 0;
  1236. break;
  1237. }
  1238. if (channels > 0)
  1239. first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
  1240. else
  1241. first_ch_bits = 0;
  1242. if (state->mixer->protocol == UAC_VERSION_1) {
  1243. /* check all control types */
  1244. for (i = 0; i < 10; i++) {
  1245. unsigned int ch_bits = 0;
  1246. for (j = 0; j < channels; j++) {
  1247. unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
  1248. if (mask & (1 << i))
  1249. ch_bits |= (1 << j);
  1250. }
  1251. /* audio class v1 controls are never read-only */
  1252. if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
  1253. build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0);
  1254. if (master_bits & (1 << i))
  1255. build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0);
  1256. }
  1257. } else { /* UAC_VERSION_2 */
  1258. for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
  1259. unsigned int ch_bits = 0;
  1260. unsigned int ch_read_only = 0;
  1261. for (j = 0; j < channels; j++) {
  1262. unsigned int mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize);
  1263. if (uac2_control_is_readable(mask, i)) {
  1264. ch_bits |= (1 << j);
  1265. if (!uac2_control_is_writeable(mask, i))
  1266. ch_read_only |= (1 << j);
  1267. }
  1268. }
  1269. /* NOTE: build_feature_ctl() will mark the control read-only if all channels
  1270. * are marked read-only in the descriptors. Otherwise, the control will be
  1271. * reported as writeable, but the driver will not actually issue a write
  1272. * command for read-only channels */
  1273. if (ch_bits & 1) /* the first channel must be set (for ease of programming) */
  1274. build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only);
  1275. if (uac2_control_is_readable(master_bits, i))
  1276. build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
  1277. !uac2_control_is_writeable(master_bits, i));
  1278. }
  1279. }
  1280. return 0;
  1281. }
  1282. /*
  1283. * Mixer Unit
  1284. */
  1285. /*
  1286. * build a mixer unit control
  1287. *
  1288. * the callbacks are identical with feature unit.
  1289. * input channel number (zero based) is given in control field instead.
  1290. */
  1291. static void build_mixer_unit_ctl(struct mixer_build *state,
  1292. struct uac_mixer_unit_descriptor *desc,
  1293. int in_pin, int in_ch, int unitid,
  1294. struct usb_audio_term *iterm)
  1295. {
  1296. struct usb_mixer_elem_info *cval;
  1297. unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
  1298. unsigned int i, len;
  1299. struct snd_kcontrol *kctl;
  1300. const struct usbmix_name_map *map;
  1301. map = find_map(state, unitid, 0);
  1302. if (check_ignored_ctl(map))
  1303. return;
  1304. cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  1305. if (! cval)
  1306. return;
  1307. cval->mixer = state->mixer;
  1308. cval->id = unitid;
  1309. cval->control = in_ch + 1; /* based on 1 */
  1310. cval->val_type = USB_MIXER_S16;
  1311. for (i = 0; i < num_outs; i++) {
  1312. if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) {
  1313. cval->cmask |= (1 << i);
  1314. cval->channels++;
  1315. }
  1316. }
  1317. /* get min/max values */
  1318. get_min_max(cval, 0);
  1319. kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
  1320. if (! kctl) {
  1321. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1322. kfree(cval);
  1323. return;
  1324. }
  1325. kctl->private_free = usb_mixer_elem_free;
  1326. len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
  1327. if (! len)
  1328. len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0);
  1329. if (! len)
  1330. len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
  1331. append_ctl_name(kctl, " Volume");
  1332. snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n",
  1333. cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
  1334. snd_usb_mixer_add_control(state->mixer, kctl);
  1335. }
  1336. /*
  1337. * parse a mixer unit
  1338. */
  1339. static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc)
  1340. {
  1341. struct uac_mixer_unit_descriptor *desc = raw_desc;
  1342. struct usb_audio_term iterm;
  1343. int input_pins, num_ins, num_outs;
  1344. int pin, ich, err;
  1345. if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) {
  1346. snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid);
  1347. return -EINVAL;
  1348. }
  1349. /* no bmControls field (e.g. Maya44) -> ignore */
  1350. if (desc->bLength <= 10 + input_pins) {
  1351. snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid);
  1352. return 0;
  1353. }
  1354. num_ins = 0;
  1355. ich = 0;
  1356. for (pin = 0; pin < input_pins; pin++) {
  1357. err = parse_audio_unit(state, desc->baSourceID[pin]);
  1358. if (err < 0)
  1359. continue;
  1360. err = check_input_term(state, desc->baSourceID[pin], &iterm);
  1361. if (err < 0)
  1362. return err;
  1363. num_ins += iterm.channels;
  1364. for (; ich < num_ins; ++ich) {
  1365. int och, ich_has_controls = 0;
  1366. for (och = 0; och < num_outs; ++och) {
  1367. if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol),
  1368. ich, och, num_outs)) {
  1369. ich_has_controls = 1;
  1370. break;
  1371. }
  1372. }
  1373. if (ich_has_controls)
  1374. build_mixer_unit_ctl(state, desc, pin, ich,
  1375. unitid, &iterm);
  1376. }
  1377. }
  1378. return 0;
  1379. }
  1380. /*
  1381. * Processing Unit / Extension Unit
  1382. */
  1383. /* get callback for processing/extension unit */
  1384. static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  1385. {
  1386. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  1387. int err, val;
  1388. err = get_cur_ctl_value(cval, cval->control << 8, &val);
  1389. if (err < 0 && cval->mixer->ignore_ctl_error) {
  1390. ucontrol->value.integer.value[0] = cval->min;
  1391. return 0;
  1392. }
  1393. if (err < 0)
  1394. return err;
  1395. val = get_relative_value(cval, val);
  1396. ucontrol->value.integer.value[0] = val;
  1397. return 0;
  1398. }
  1399. /* put callback for processing/extension unit */
  1400. static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  1401. {
  1402. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  1403. int val, oval, err;
  1404. err = get_cur_ctl_value(cval, cval->control << 8, &oval);
  1405. if (err < 0) {
  1406. if (cval->mixer->ignore_ctl_error)
  1407. return 0;
  1408. return err;
  1409. }
  1410. val = ucontrol->value.integer.value[0];
  1411. val = get_abs_value(cval, val);
  1412. if (val != oval) {
  1413. set_cur_ctl_value(cval, cval->control << 8, val);
  1414. return 1;
  1415. }
  1416. return 0;
  1417. }
  1418. /* alsa control interface for processing/extension unit */
  1419. static struct snd_kcontrol_new mixer_procunit_ctl = {
  1420. .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  1421. .name = "", /* will be filled later */
  1422. .info = mixer_ctl_feature_info,
  1423. .get = mixer_ctl_procunit_get,
  1424. .put = mixer_ctl_procunit_put,
  1425. };
  1426. /*
  1427. * predefined data for processing units
  1428. */
  1429. struct procunit_value_info {
  1430. int control;
  1431. char *suffix;
  1432. int val_type;
  1433. int min_value;
  1434. };
  1435. struct procunit_info {
  1436. int type;
  1437. char *name;
  1438. struct procunit_value_info *values;
  1439. };
  1440. static struct procunit_value_info updown_proc_info[] = {
  1441. { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1442. { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
  1443. { 0 }
  1444. };
  1445. static struct procunit_value_info prologic_proc_info[] = {
  1446. { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1447. { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
  1448. { 0 }
  1449. };
  1450. static struct procunit_value_info threed_enh_proc_info[] = {
  1451. { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1452. { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
  1453. { 0 }
  1454. };
  1455. static struct procunit_value_info reverb_proc_info[] = {
  1456. { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1457. { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
  1458. { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
  1459. { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
  1460. { 0 }
  1461. };
  1462. static struct procunit_value_info chorus_proc_info[] = {
  1463. { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1464. { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
  1465. { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
  1466. { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
  1467. { 0 }
  1468. };
  1469. static struct procunit_value_info dcr_proc_info[] = {
  1470. { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
  1471. { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
  1472. { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
  1473. { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
  1474. { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
  1475. { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
  1476. { 0 }
  1477. };
  1478. static struct procunit_info procunits[] = {
  1479. { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
  1480. { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
  1481. { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
  1482. { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
  1483. { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
  1484. { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
  1485. { 0 },
  1486. };
  1487. /*
  1488. * predefined data for extension units
  1489. */
  1490. static struct procunit_value_info clock_rate_xu_info[] = {
  1491. { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
  1492. { 0 }
  1493. };
  1494. static struct procunit_value_info clock_source_xu_info[] = {
  1495. { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
  1496. { 0 }
  1497. };
  1498. static struct procunit_value_info spdif_format_xu_info[] = {
  1499. { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
  1500. { 0 }
  1501. };
  1502. static struct procunit_value_info soft_limit_xu_info[] = {
  1503. { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
  1504. { 0 }
  1505. };
  1506. static struct procunit_info extunits[] = {
  1507. { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
  1508. { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
  1509. { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
  1510. { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
  1511. { 0 }
  1512. };
  1513. /*
  1514. * build a processing/extension unit
  1515. */
  1516. static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name)
  1517. {
  1518. struct uac_processing_unit_descriptor *desc = raw_desc;
  1519. int num_ins = desc->bNrInPins;
  1520. struct usb_mixer_elem_info *cval;
  1521. struct snd_kcontrol *kctl;
  1522. int i, err, nameid, type, len;
  1523. struct procunit_info *info;
  1524. struct procunit_value_info *valinfo;
  1525. const struct usbmix_name_map *map;
  1526. static struct procunit_value_info default_value_info[] = {
  1527. { 0x01, "Switch", USB_MIXER_BOOLEAN },
  1528. { 0 }
  1529. };
  1530. static struct procunit_info default_info = {
  1531. 0, NULL, default_value_info
  1532. };
  1533. if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
  1534. desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
  1535. snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid);
  1536. return -EINVAL;
  1537. }
  1538. for (i = 0; i < num_ins; i++) {
  1539. if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
  1540. return err;
  1541. }
  1542. type = le16_to_cpu(desc->wProcessType);
  1543. for (info = list; info && info->type; info++)
  1544. if (info->type == type)
  1545. break;
  1546. if (! info || ! info->type)
  1547. info = &default_info;
  1548. for (valinfo = info->values; valinfo->control; valinfo++) {
  1549. __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
  1550. if (! (controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
  1551. continue;
  1552. map = find_map(state, unitid, valinfo->control);
  1553. if (check_ignored_ctl(map))
  1554. continue;
  1555. cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  1556. if (! cval) {
  1557. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1558. return -ENOMEM;
  1559. }
  1560. cval->mixer = state->mixer;
  1561. cval->id = unitid;
  1562. cval->control = valinfo->control;
  1563. cval->val_type = valinfo->val_type;
  1564. cval->channels = 1;
  1565. /* get min/max values */
  1566. if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
  1567. __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
  1568. /* FIXME: hard-coded */
  1569. cval->min = 1;
  1570. cval->max = control_spec[0];
  1571. cval->res = 1;
  1572. cval->initialized = 1;
  1573. } else {
  1574. if (type == USB_XU_CLOCK_RATE) {
  1575. /* E-Mu USB 0404/0202/TrackerPre/0204
  1576. * samplerate control quirk
  1577. */
  1578. cval->min = 0;
  1579. cval->max = 5;
  1580. cval->res = 1;
  1581. cval->initialized = 1;
  1582. } else
  1583. get_min_max(cval, valinfo->min_value);
  1584. }
  1585. kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
  1586. if (! kctl) {
  1587. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1588. kfree(cval);
  1589. return -ENOMEM;
  1590. }
  1591. kctl->private_free = usb_mixer_elem_free;
  1592. if (check_mapped_name(map, kctl->id.name,
  1593. sizeof(kctl->id.name)))
  1594. /* nothing */ ;
  1595. else if (info->name)
  1596. strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
  1597. else {
  1598. nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
  1599. len = 0;
  1600. if (nameid)
  1601. len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
  1602. if (! len)
  1603. strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
  1604. }
  1605. append_ctl_name(kctl, " ");
  1606. append_ctl_name(kctl, valinfo->suffix);
  1607. snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n",
  1608. cval->id, kctl->id.name, cval->channels, cval->min, cval->max);
  1609. if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
  1610. return err;
  1611. }
  1612. return 0;
  1613. }
  1614. static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc)
  1615. {
  1616. return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit");
  1617. }
  1618. static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc)
  1619. {
  1620. /* Note that we parse extension units with processing unit descriptors.
  1621. * That's ok as the layout is the same */
  1622. return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit");
  1623. }
  1624. /*
  1625. * Selector Unit
  1626. */
  1627. /* info callback for selector unit
  1628. * use an enumerator type for routing
  1629. */
  1630. static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
  1631. {
  1632. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  1633. const char **itemlist = (const char **)kcontrol->private_value;
  1634. if (snd_BUG_ON(!itemlist))
  1635. return -EINVAL;
  1636. return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
  1637. }
  1638. /* get callback for selector unit */
  1639. static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  1640. {
  1641. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  1642. int val, err;
  1643. err = get_cur_ctl_value(cval, cval->control << 8, &val);
  1644. if (err < 0) {
  1645. if (cval->mixer->ignore_ctl_error) {
  1646. ucontrol->value.enumerated.item[0] = 0;
  1647. return 0;
  1648. }
  1649. return err;
  1650. }
  1651. val = get_relative_value(cval, val);
  1652. ucontrol->value.enumerated.item[0] = val;
  1653. return 0;
  1654. }
  1655. /* put callback for selector unit */
  1656. static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  1657. {
  1658. struct usb_mixer_elem_info *cval = kcontrol->private_data;
  1659. int val, oval, err;
  1660. err = get_cur_ctl_value(cval, cval->control << 8, &oval);
  1661. if (err < 0) {
  1662. if (cval->mixer->ignore_ctl_error)
  1663. return 0;
  1664. return err;
  1665. }
  1666. val = ucontrol->value.enumerated.item[0];
  1667. val = get_abs_value(cval, val);
  1668. if (val != oval) {
  1669. set_cur_ctl_value(cval, cval->control << 8, val);
  1670. return 1;
  1671. }
  1672. return 0;
  1673. }
  1674. /* alsa control interface for selector unit */
  1675. static struct snd_kcontrol_new mixer_selectunit_ctl = {
  1676. .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  1677. .name = "", /* will be filled later */
  1678. .info = mixer_ctl_selector_info,
  1679. .get = mixer_ctl_selector_get,
  1680. .put = mixer_ctl_selector_put,
  1681. };
  1682. /* private free callback.
  1683. * free both private_data and private_value
  1684. */
  1685. static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
  1686. {
  1687. int i, num_ins = 0;
  1688. if (kctl->private_data) {
  1689. struct usb_mixer_elem_info *cval = kctl->private_data;
  1690. num_ins = cval->max;
  1691. kfree(cval);
  1692. kctl->private_data = NULL;
  1693. }
  1694. if (kctl->private_value) {
  1695. char **itemlist = (char **)kctl->private_value;
  1696. for (i = 0; i < num_ins; i++)
  1697. kfree(itemlist[i]);
  1698. kfree(itemlist);
  1699. kctl->private_value = 0;
  1700. }
  1701. }
  1702. /*
  1703. * parse a selector unit
  1704. */
  1705. static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc)
  1706. {
  1707. struct uac_selector_unit_descriptor *desc = raw_desc;
  1708. unsigned int i, nameid, len;
  1709. int err;
  1710. struct usb_mixer_elem_info *cval;
  1711. struct snd_kcontrol *kctl;
  1712. const struct usbmix_name_map *map;
  1713. char **namelist;
  1714. if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
  1715. snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
  1716. return -EINVAL;
  1717. }
  1718. for (i = 0; i < desc->bNrInPins; i++) {
  1719. if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
  1720. return err;
  1721. }
  1722. if (desc->bNrInPins == 1) /* only one ? nonsense! */
  1723. return 0;
  1724. map = find_map(state, unitid, 0);
  1725. if (check_ignored_ctl(map))
  1726. return 0;
  1727. cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  1728. if (! cval) {
  1729. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1730. return -ENOMEM;
  1731. }
  1732. cval->mixer = state->mixer;
  1733. cval->id = unitid;
  1734. cval->val_type = USB_MIXER_U8;
  1735. cval->channels = 1;
  1736. cval->min = 1;
  1737. cval->max = desc->bNrInPins;
  1738. cval->res = 1;
  1739. cval->initialized = 1;
  1740. if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
  1741. cval->control = UAC2_CX_CLOCK_SELECTOR;
  1742. else
  1743. cval->control = 0;
  1744. namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
  1745. if (! namelist) {
  1746. snd_printk(KERN_ERR "cannot malloc\n");
  1747. kfree(cval);
  1748. return -ENOMEM;
  1749. }
  1750. #define MAX_ITEM_NAME_LEN 64
  1751. for (i = 0; i < desc->bNrInPins; i++) {
  1752. struct usb_audio_term iterm;
  1753. len = 0;
  1754. namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
  1755. if (! namelist[i]) {
  1756. snd_printk(KERN_ERR "cannot malloc\n");
  1757. while (i--)
  1758. kfree(namelist[i]);
  1759. kfree(namelist);
  1760. kfree(cval);
  1761. return -ENOMEM;
  1762. }
  1763. len = check_mapped_selector_name(state, unitid, i, namelist[i],
  1764. MAX_ITEM_NAME_LEN);
  1765. if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
  1766. len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
  1767. if (! len)
  1768. sprintf(namelist[i], "Input %d", i);
  1769. }
  1770. kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
  1771. if (! kctl) {
  1772. snd_printk(KERN_ERR "cannot malloc kcontrol\n");
  1773. kfree(namelist);
  1774. kfree(cval);
  1775. return -ENOMEM;
  1776. }
  1777. kctl->private_value = (unsigned long)namelist;
  1778. kctl->private_free = usb_mixer_selector_elem_free;
  1779. nameid = uac_selector_unit_iSelector(desc);
  1780. len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
  1781. if (len)
  1782. ;
  1783. else if (nameid)
  1784. snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name));
  1785. else {
  1786. len = get_term_name(state, &state->oterm,
  1787. kctl->id.name, sizeof(kctl->id.name), 0);
  1788. if (! len)
  1789. strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
  1790. if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
  1791. append_ctl_name(kctl, " Clock Source");
  1792. else if ((state->oterm.type & 0xff00) == 0x0100)
  1793. append_ctl_name(kctl, " Capture Source");
  1794. else
  1795. append_ctl_name(kctl, " Playback Source");
  1796. }
  1797. snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n",
  1798. cval->id, kctl->id.name, desc->bNrInPins);
  1799. if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0)
  1800. return err;
  1801. return 0;
  1802. }
  1803. /*
  1804. * parse an audio unit recursively
  1805. */
  1806. static int parse_audio_unit(struct mixer_build *state, int unitid)
  1807. {
  1808. unsigned char *p1;
  1809. if (test_and_set_bit(unitid, state->unitbitmap))
  1810. return 0; /* the unit already visited */
  1811. p1 = find_audio_control_unit(state, unitid);
  1812. if (!p1) {
  1813. snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
  1814. return -EINVAL;
  1815. }
  1816. switch (p1[2]) {
  1817. case UAC_INPUT_TERMINAL:
  1818. case UAC2_CLOCK_SOURCE:
  1819. return 0; /* NOP */
  1820. case UAC_MIXER_UNIT:
  1821. return parse_audio_mixer_unit(state, unitid, p1);
  1822. case UAC_SELECTOR_UNIT:
  1823. case UAC2_CLOCK_SELECTOR:
  1824. return parse_audio_selector_unit(state, unitid, p1);
  1825. case UAC_FEATURE_UNIT:
  1826. return parse_audio_feature_unit(state, unitid, p1);
  1827. case UAC1_PROCESSING_UNIT:
  1828. /* UAC2_EFFECT_UNIT has the same value */
  1829. if (state->mixer->protocol == UAC_VERSION_1)
  1830. return parse_audio_processing_unit(state, unitid, p1);
  1831. else
  1832. return 0; /* FIXME - effect units not implemented yet */
  1833. case UAC1_EXTENSION_UNIT:
  1834. /* UAC2_PROCESSING_UNIT_V2 has the same value */
  1835. if (state->mixer->protocol == UAC_VERSION_1)
  1836. return parse_audio_extension_unit(state, unitid, p1);
  1837. else /* UAC_VERSION_2 */
  1838. return parse_audio_processing_unit(state, unitid, p1);
  1839. case UAC2_EXTENSION_UNIT_V2:
  1840. return parse_audio_extension_unit(state, unitid, p1);
  1841. default:
  1842. snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
  1843. return -EINVAL;
  1844. }
  1845. }
  1846. static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
  1847. {
  1848. kfree(mixer->id_elems);
  1849. if (mixer->urb) {
  1850. kfree(mixer->urb->transfer_buffer);
  1851. usb_free_urb(mixer->urb);
  1852. }
  1853. usb_free_urb(mixer->rc_urb);
  1854. kfree(mixer->rc_setup_packet);
  1855. kfree(mixer);
  1856. }
  1857. static int snd_usb_mixer_dev_free(struct snd_device *device)
  1858. {
  1859. struct usb_mixer_interface *mixer = device->device_data;
  1860. snd_usb_mixer_free(mixer);
  1861. return 0;
  1862. }
  1863. /*
  1864. * create mixer controls
  1865. *
  1866. * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
  1867. */
  1868. static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
  1869. {
  1870. struct mixer_build state;
  1871. int err;
  1872. const struct usbmix_ctl_map *map;
  1873. void *p;
  1874. memset(&state, 0, sizeof(state));
  1875. state.chip = mixer->chip;
  1876. state.mixer = mixer;
  1877. state.buffer = mixer->hostif->extra;
  1878. state.buflen = mixer->hostif->extralen;
  1879. /* check the mapping table */
  1880. for (map = usbmix_ctl_maps; map->id; map++) {
  1881. if (map->id == state.chip->usb_id) {
  1882. state.map = map->map;
  1883. state.selector_map = map->selector_map;
  1884. mixer->ignore_ctl_error = map->ignore_ctl_error;
  1885. break;
  1886. }
  1887. }
  1888. p = NULL;
  1889. while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, mixer->hostif->extralen,
  1890. p, UAC_OUTPUT_TERMINAL)) != NULL) {
  1891. if (mixer->protocol == UAC_VERSION_1) {
  1892. struct uac1_output_terminal_descriptor *desc = p;
  1893. if (desc->bLength < sizeof(*desc))
  1894. continue; /* invalid descriptor? */
  1895. set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
  1896. state.oterm.id = desc->bTerminalID;
  1897. state.oterm.type = le16_to_cpu(desc->wTerminalType);
  1898. state.oterm.name = desc->iTerminal;
  1899. err = parse_audio_unit(&state, desc->bSourceID);
  1900. if (err < 0 && err != -EINVAL)
  1901. return err;
  1902. } else { /* UAC_VERSION_2 */
  1903. struct uac2_output_terminal_descriptor *desc = p;
  1904. if (desc->bLength < sizeof(*desc))
  1905. continue; /* invalid descriptor? */
  1906. set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */
  1907. state.oterm.id = desc->bTerminalID;
  1908. state.oterm.type = le16_to_cpu(desc->wTerminalType);
  1909. state.oterm.name = desc->iTerminal;
  1910. err = parse_audio_unit(&state, desc->bSourceID);
  1911. if (err < 0 && err != -EINVAL)
  1912. return err;
  1913. /* for UAC2, use the same approach to also add the clock selectors */
  1914. err = parse_audio_unit(&state, desc->bCSourceID);
  1915. if (err < 0 && err != -EINVAL)
  1916. return err;
  1917. }
  1918. }
  1919. return 0;
  1920. }
  1921. void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
  1922. {
  1923. struct usb_mixer_elem_info *info;
  1924. for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem)
  1925. snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
  1926. info->elem_id);
  1927. }
  1928. static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
  1929. int unitid,
  1930. struct usb_mixer_elem_info *cval)
  1931. {
  1932. static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
  1933. "S8", "U8", "S16", "U16"};
  1934. snd_iprintf(buffer, " Unit: %i\n", unitid);
  1935. if (cval->elem_id)
  1936. snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n",
  1937. cval->elem_id->name, cval->elem_id->index);
  1938. snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
  1939. "channels=%i, type=\"%s\"\n", cval->id,
  1940. cval->control, cval->cmask, cval->channels,
  1941. val_types[cval->val_type]);
  1942. snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
  1943. cval->min, cval->max, cval->dBmin, cval->dBmax);
  1944. }
  1945. static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
  1946. struct snd_info_buffer *buffer)
  1947. {
  1948. struct snd_usb_audio *chip = entry->private_data;
  1949. struct usb_mixer_interface *mixer;
  1950. struct usb_mixer_elem_info *cval;
  1951. int unitid;
  1952. list_for_each_entry(mixer, &chip->mixer_list, list) {
  1953. snd_iprintf(buffer,
  1954. "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
  1955. chip->usb_id, snd_usb_ctrl_intf(chip),
  1956. mixer->ignore_ctl_error);
  1957. snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
  1958. for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
  1959. for (cval = mixer->id_elems[unitid]; cval;
  1960. cval = cval->next_id_elem)
  1961. snd_usb_mixer_dump_cval(buffer, unitid, cval);
  1962. }
  1963. }
  1964. }
  1965. static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
  1966. int attribute, int value, int index)
  1967. {
  1968. struct usb_mixer_elem_info *info;
  1969. __u8 unitid = (index >> 8) & 0xff;
  1970. __u8 control = (value >> 8) & 0xff;
  1971. __u8 channel = value & 0xff;
  1972. if (channel >= MAX_CHANNELS) {
  1973. snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n",
  1974. __func__, channel);
  1975. return;
  1976. }
  1977. for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) {
  1978. if (info->control != control)
  1979. continue;
  1980. switch (attribute) {
  1981. case UAC2_CS_CUR:
  1982. /* invalidate cache, so the value is read from the device */
  1983. if (channel)
  1984. info->cached &= ~(1 << channel);
  1985. else /* master channel */
  1986. info->cached = 0;
  1987. snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
  1988. info->elem_id);
  1989. break;
  1990. case UAC2_CS_RANGE:
  1991. /* TODO */
  1992. break;
  1993. case UAC2_CS_MEM:
  1994. /* TODO */
  1995. break;
  1996. default:
  1997. snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n",
  1998. attribute);
  1999. break;
  2000. } /* switch */
  2001. }
  2002. }
  2003. static void snd_usb_mixer_interrupt(struct urb *urb)
  2004. {
  2005. struct usb_mixer_interface *mixer = urb->context;
  2006. int len = urb->actual_length;
  2007. int ustatus = urb->status;
  2008. if (ustatus != 0)
  2009. goto requeue;
  2010. if (mixer->protocol == UAC_VERSION_1) {
  2011. struct uac1_status_word *status;
  2012. for (status = urb->transfer_buffer;
  2013. len >= sizeof(*status);
  2014. len -= sizeof(*status), status++) {
  2015. snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n",
  2016. status->bStatusType,
  2017. status->bOriginator);
  2018. /* ignore any notifications not from the control interface */
  2019. if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
  2020. UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
  2021. continue;
  2022. if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
  2023. snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
  2024. else
  2025. snd_usb_mixer_notify_id(mixer, status->bOriginator);
  2026. }
  2027. } else { /* UAC_VERSION_2 */
  2028. struct uac2_interrupt_data_msg *msg;
  2029. for (msg = urb->transfer_buffer;
  2030. len >= sizeof(*msg);
  2031. len -= sizeof(*msg), msg++) {
  2032. /* drop vendor specific and endpoint requests */
  2033. if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
  2034. (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
  2035. continue;
  2036. snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
  2037. le16_to_cpu(msg->wValue),
  2038. le16_to_cpu(msg->wIndex));
  2039. }
  2040. }
  2041. requeue:
  2042. if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) {
  2043. urb->dev = mixer->chip->dev;
  2044. usb_submit_urb(urb, GFP_ATOMIC);
  2045. }
  2046. }
  2047. /* stop any bus activity of a mixer */
  2048. void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
  2049. {
  2050. usb_kill_urb(mixer->urb);
  2051. usb_kill_urb(mixer->rc_urb);
  2052. }
  2053. int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
  2054. {
  2055. int err;
  2056. if (mixer->urb) {
  2057. err = usb_submit_urb(mixer->urb, GFP_NOIO);
  2058. if (err < 0)
  2059. return err;
  2060. }
  2061. return 0;
  2062. }
  2063. /* create the handler for the optional status interrupt endpoint */
  2064. static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
  2065. {
  2066. struct usb_endpoint_descriptor *ep;
  2067. void *transfer_buffer;
  2068. int buffer_length;
  2069. unsigned int epnum;
  2070. /* we need one interrupt input endpoint */
  2071. if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
  2072. return 0;
  2073. ep = get_endpoint(mixer->hostif, 0);
  2074. if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
  2075. return 0;
  2076. epnum = usb_endpoint_num(ep);
  2077. buffer_length = le16_to_cpu(ep->wMaxPacketSize);
  2078. transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
  2079. if (!transfer_buffer)
  2080. return -ENOMEM;
  2081. mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
  2082. if (!mixer->urb) {
  2083. kfree(transfer_buffer);
  2084. return -ENOMEM;
  2085. }
  2086. usb_fill_int_urb(mixer->urb, mixer->chip->dev,
  2087. usb_rcvintpipe(mixer->chip->dev, epnum),
  2088. transfer_buffer, buffer_length,
  2089. snd_usb_mixer_interrupt, mixer, ep->bInterval);
  2090. usb_submit_urb(mixer->urb, GFP_KERNEL);
  2091. return 0;
  2092. }
  2093. int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
  2094. int ignore_error)
  2095. {
  2096. static struct snd_device_ops dev_ops = {
  2097. .dev_free = snd_usb_mixer_dev_free
  2098. };
  2099. struct usb_mixer_interface *mixer;
  2100. struct snd_info_entry *entry;
  2101. int err;
  2102. strcpy(chip->card->mixername, "USB Mixer");
  2103. mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
  2104. if (!mixer)
  2105. return -ENOMEM;
  2106. mixer->chip = chip;
  2107. mixer->ignore_ctl_error = ignore_error;
  2108. mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
  2109. GFP_KERNEL);
  2110. if (!mixer->id_elems) {
  2111. kfree(mixer);
  2112. return -ENOMEM;
  2113. }
  2114. mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
  2115. switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
  2116. case UAC_VERSION_1:
  2117. default:
  2118. mixer->protocol = UAC_VERSION_1;
  2119. break;
  2120. case UAC_VERSION_2:
  2121. mixer->protocol = UAC_VERSION_2;
  2122. break;
  2123. }
  2124. if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
  2125. (err = snd_usb_mixer_status_create(mixer)) < 0)
  2126. goto _error;
  2127. snd_usb_mixer_apply_create_quirk(mixer);
  2128. err = snd_device_new(chip->card, SNDRV_DEV_LOWLEVEL, mixer, &dev_ops);
  2129. if (err < 0)
  2130. goto _error;
  2131. if (list_empty(&chip->mixer_list) &&
  2132. !snd_card_proc_new(chip->card, "usbmixer", &entry))
  2133. snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
  2134. list_add(&mixer->list, &chip->mixer_list);
  2135. return 0;
  2136. _error:
  2137. snd_usb_mixer_free(mixer);
  2138. return err;
  2139. }
  2140. void snd_usb_mixer_disconnect(struct list_head *p)
  2141. {
  2142. struct usb_mixer_interface *mixer;
  2143. mixer = list_entry(p, struct usb_mixer_interface, list);
  2144. usb_kill_urb(mixer->urb);
  2145. usb_kill_urb(mixer->rc_urb);
  2146. }