/* * (Tentative) USB Audio Driver for ALSA * * Mixer control part * * Copyright (c) 2002 by Takashi Iwai * * Many codes borrowed from audio.c by * Alan Cox (alan@lxorguk.ukuu.org.uk) * Thomas Sailer (sailer@ife.ee.ethz.ch) * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ /* * TODOs, for both the mixer and the streaming interfaces: * * - support for UAC2 effect units * - support for graphical equalizers * - RANGE and MEM set commands (UAC2) * - RANGE and MEM interrupt dispatchers (UAC2) * - audio channel clustering (UAC2) * - audio sample rate converter units (UAC2) * - proper handling of clock multipliers (UAC2) * - dispatch clock change notifications (UAC2) * - stop PCM streams which use a clock that became invalid * - stop PCM streams which use a clock selector that has changed * - parse available sample rates again when clock sources changed */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "usbaudio.h" #include "mixer.h" #include "helper.h" #include "mixer_quirks.h" #include "power.h" #define MAX_ID_ELEMS 256 struct usb_audio_term { int id; int type; int channels; unsigned int chconfig; int name; }; struct usbmix_name_map; struct mixer_build { struct snd_usb_audio *chip; struct usb_mixer_interface *mixer; unsigned char *buffer; unsigned int buflen; DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS); struct usb_audio_term oterm; const struct usbmix_name_map *map; const struct usbmix_selector_map *selector_map; }; /*E-mu 0202/0404/0204 eXtension Unit(XU) control*/ enum { USB_XU_CLOCK_RATE = 0xe301, USB_XU_CLOCK_SOURCE = 0xe302, USB_XU_DIGITAL_IO_STATUS = 0xe303, USB_XU_DEVICE_OPTIONS = 0xe304, USB_XU_DIRECT_MONITORING = 0xe305, USB_XU_METERING = 0xe306 }; enum { USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/ USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */ USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */ USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */ }; /* * manual mapping of mixer names * if the mixer topology is too complicated and the parsed names are * ambiguous, add the entries in usbmixer_maps.c. */ #include "mixer_maps.c" static const struct usbmix_name_map * find_map(struct mixer_build *state, int unitid, int control) { const struct usbmix_name_map *p = state->map; if (!p) return NULL; for (p = state->map; p->id; p++) { if (p->id == unitid && (!control || !p->control || control == p->control)) return p; } return NULL; } /* get the mapped name if the unit matches */ static int check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen) { if (!p || !p->name) return 0; buflen--; return strlcpy(buf, p->name, buflen); } /* check whether the control should be ignored */ static inline int check_ignored_ctl(const struct usbmix_name_map *p) { if (!p || p->name || p->dB) return 0; return 1; } /* dB mapping */ static inline void check_mapped_dB(const struct usbmix_name_map *p, struct usb_mixer_elem_info *cval) { if (p && p->dB) { cval->dBmin = p->dB->min; cval->dBmax = p->dB->max; cval->initialized = 1; } } /* get the mapped selector source name */ static int check_mapped_selector_name(struct mixer_build *state, int unitid, int index, char *buf, int buflen) { const struct usbmix_selector_map *p; if (!state->selector_map) return 0; for (p = state->selector_map; p->id; p++) { if (p->id == unitid && index < p->count) return strlcpy(buf, p->names[index], buflen); } return 0; } /* * find an audio control unit with the given unit id */ static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit) { /* we just parse the header */ struct uac_feature_unit_descriptor *hdr = NULL; while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, USB_DT_CS_INTERFACE)) != NULL) { if (hdr->bLength >= 4 && hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER && hdr->bUnitID == unit) return hdr; } return NULL; } /* * copy a string with the given id */ static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen) { int len = usb_string(state->chip->dev, index, buf, maxlen - 1); buf[len] = 0; return len; } /* * convert from the byte/word on usb descriptor to the zero-based integer */ static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) { switch (cval->val_type) { case USB_MIXER_BOOLEAN: return !!val; case USB_MIXER_INV_BOOLEAN: return !val; case USB_MIXER_U8: val &= 0xff; break; case USB_MIXER_S8: val &= 0xff; if (val >= 0x80) val -= 0x100; break; case USB_MIXER_U16: val &= 0xffff; break; case USB_MIXER_S16: val &= 0xffff; if (val >= 0x8000) val -= 0x10000; break; } return val; } /* * convert from the zero-based int to the byte/word for usb descriptor */ static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) { switch (cval->val_type) { case USB_MIXER_BOOLEAN: return !!val; case USB_MIXER_INV_BOOLEAN: return !val; case USB_MIXER_S8: case USB_MIXER_U8: return val & 0xff; case USB_MIXER_S16: case USB_MIXER_U16: return val & 0xffff; } return 0; /* not reached */ } static int get_relative_value(struct usb_mixer_elem_info *cval, int val) { if (!cval->res) cval->res = 1; if (val < cval->min) return 0; else if (val >= cval->max) return (cval->max - cval->min + cval->res - 1) / cval->res; else return (val - cval->min) / cval->res; } static int get_abs_value(struct usb_mixer_elem_info *cval, int val) { if (val < 0) return cval->min; if (!cval->res) cval->res = 1; val *= cval->res; val += cval->min; if (val > cval->max) return cval->max; return val; } /* * retrieve a mixer value */ static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) { struct snd_usb_audio *chip = cval->mixer->chip; unsigned char buf[2]; int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; int timeout = 10; int idx = 0, err; err = snd_usb_autoresume(cval->mixer->chip); if (err < 0) return -EIO; down_read(&chip->shutdown_rwsem); while (timeout-- > 0) { if (chip->shutdown) break; idx = snd_usb_ctrl_intf(chip) | (cval->id << 8); if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, validx, idx, buf, val_len) >= val_len) { *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); err = 0; goto out; } } usb_audio_dbg(chip, "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", request, validx, idx, cval->val_type); err = -EINVAL; out: up_read(&chip->shutdown_rwsem); snd_usb_autosuspend(cval->mixer->chip); return err; } static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) { struct snd_usb_audio *chip = cval->mixer->chip; unsigned char buf[2 + 3 * sizeof(__u16)]; /* enough space for one range */ unsigned char *val; int idx = 0, ret, size; __u8 bRequest; if (request == UAC_GET_CUR) { bRequest = UAC2_CS_CUR; size = sizeof(__u16); } else { bRequest = UAC2_CS_RANGE; size = sizeof(buf); } memset(buf, 0, sizeof(buf)); ret = snd_usb_autoresume(chip) ? -EIO : 0; if (ret) goto error; down_read(&chip->shutdown_rwsem); if (chip->shutdown) { ret = -ENODEV; } else { idx = snd_usb_ctrl_intf(chip) | (cval->id << 8); ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, validx, idx, buf, size); } up_read(&chip->shutdown_rwsem); snd_usb_autosuspend(chip); if (ret < 0) { error: usb_audio_err(chip, "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", request, validx, idx, cval->val_type); return ret; } /* FIXME: how should we handle multiple triplets here? */ switch (request) { case UAC_GET_CUR: val = buf; break; case UAC_GET_MIN: val = buf + sizeof(__u16); break; case UAC_GET_MAX: val = buf + sizeof(__u16) * 2; break; case UAC_GET_RES: val = buf + sizeof(__u16) * 3; break; default: return -EINVAL; } *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16))); return 0; } static int get_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) { validx += cval->idx_off; return (cval->mixer->protocol == UAC_VERSION_1) ? get_ctl_value_v1(cval, request, validx, value_ret) : get_ctl_value_v2(cval, request, validx, value_ret); } static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value) { return get_ctl_value(cval, UAC_GET_CUR, validx, value); } /* channel = 0: master, 1 = first channel */ static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, int channel, int *value) { return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value); } static int get_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, int index, int *value) { int err; if (cval->cached & (1 << channel)) { *value = cval->cache_val[index]; return 0; } err = get_cur_mix_raw(cval, channel, value); if (err < 0) { if (!cval->mixer->ignore_ctl_error) usb_audio_dbg(cval->mixer->chip, "cannot get current value for control %d ch %d: err = %d\n", cval->control, channel, err); return err; } cval->cached |= 1 << channel; cval->cache_val[index] = *value; return 0; } /* * set a mixer value */ int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, int request, int validx, int value_set) { struct snd_usb_audio *chip = cval->mixer->chip; unsigned char buf[2]; int idx = 0, val_len, err, timeout = 10; validx += cval->idx_off; if (cval->mixer->protocol == UAC_VERSION_1) { val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; } else { /* UAC_VERSION_2 */ /* audio class v2 controls are always 2 bytes in size */ val_len = sizeof(__u16); /* FIXME */ if (request != UAC_SET_CUR) { usb_audio_dbg(chip, "RANGE setting not yet supported\n"); return -EINVAL; } request = UAC2_CS_CUR; } value_set = convert_bytes_value(cval, value_set); buf[0] = value_set & 0xff; buf[1] = (value_set >> 8) & 0xff; err = snd_usb_autoresume(chip); if (err < 0) return -EIO; down_read(&chip->shutdown_rwsem); while (timeout-- > 0) { if (chip->shutdown) break; idx = snd_usb_ctrl_intf(chip) | (cval->id << 8); if (snd_usb_ctl_msg(chip->dev, usb_sndctrlpipe(chip->dev, 0), request, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, validx, idx, buf, val_len) >= 0) { err = 0; goto out; } } usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", request, validx, idx, cval->val_type, buf[0], buf[1]); err = -EINVAL; out: up_read(&chip->shutdown_rwsem); snd_usb_autosuspend(chip); return err; } static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value) { return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); } static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, int index, int value) { int err; unsigned int read_only = (channel == 0) ? cval->master_readonly : cval->ch_readonly & (1 << (channel - 1)); if (read_only) { usb_audio_dbg(cval->mixer->chip, "%s(): channel %d of control %d is read_only\n", __func__, channel, cval->control); return 0; } err = snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, (cval->control << 8) | channel, value); if (err < 0) return err; cval->cached |= 1 << channel; cval->cache_val[index] = value; return 0; } /* * TLV callback for mixer volume controls */ int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, unsigned int size, unsigned int __user *_tlv) { struct usb_mixer_elem_info *cval = kcontrol->private_data; DECLARE_TLV_DB_MINMAX(scale, 0, 0); if (size < sizeof(scale)) return -ENOMEM; scale[2] = cval->dBmin; scale[3] = cval->dBmax; if (copy_to_user(_tlv, scale, sizeof(scale))) return -EFAULT; return 0; } /* * parser routines begin here... */ static int parse_audio_unit(struct mixer_build *state, int unitid); /* * check if the input/output channel routing is enabled on the given bitmap. * used for mixer unit parser */ static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs) { int idx = ich * num_outs + och; return bmap[idx >> 3] & (0x80 >> (idx & 7)); } /* * add an alsa control element * search and increment the index until an empty slot is found. * * if failed, give up and free the control instance. */ int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer, struct snd_kcontrol *kctl) { struct usb_mixer_elem_info *cval = kctl->private_data; int err; while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) kctl->id.index++; if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", err); return err; } cval->elem_id = &kctl->id; cval->next_id_elem = mixer->id_elems[cval->id]; mixer->id_elems[cval->id] = cval; return 0; } /* * get a terminal name string */ static struct iterm_name_combo { int type; char *name; } iterm_names[] = { { 0x0300, "Output" }, { 0x0301, "Speaker" }, { 0x0302, "Headphone" }, { 0x0303, "HMD Audio" }, { 0x0304, "Desktop Speaker" }, { 0x0305, "Room Speaker" }, { 0x0306, "Com Speaker" }, { 0x0307, "LFE" }, { 0x0600, "External In" }, { 0x0601, "Analog In" }, { 0x0602, "Digital In" }, { 0x0603, "Line" }, { 0x0604, "Legacy In" }, { 0x0605, "IEC958 In" }, { 0x0606, "1394 DA Stream" }, { 0x0607, "1394 DV Stream" }, { 0x0700, "Embedded" }, { 0x0701, "Noise Source" }, { 0x0702, "Equalization Noise" }, { 0x0703, "CD" }, { 0x0704, "DAT" }, { 0x0705, "DCC" }, { 0x0706, "MiniDisk" }, { 0x0707, "Analog Tape" }, { 0x0708, "Phonograph" }, { 0x0709, "VCR Audio" }, { 0x070a, "Video Disk Audio" }, { 0x070b, "DVD Audio" }, { 0x070c, "TV Tuner Audio" }, { 0x070d, "Satellite Rec Audio" }, { 0x070e, "Cable Tuner Audio" }, { 0x070f, "DSS Audio" }, { 0x0710, "Radio Receiver" }, { 0x0711, "Radio Transmitter" }, { 0x0712, "Multi-Track Recorder" }, { 0x0713, "Synthesizer" }, { 0 }, }; static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, unsigned char *name, int maxlen, int term_only) { struct iterm_name_combo *names; if (iterm->name) return snd_usb_copy_string_desc(state, iterm->name, name, maxlen); /* virtual type - not a real terminal */ if (iterm->type >> 16) { if (term_only) return 0; switch (iterm->type >> 16) { case UAC_SELECTOR_UNIT: strcpy(name, "Selector"); return 8; case UAC1_PROCESSING_UNIT: strcpy(name, "Process Unit"); return 12; case UAC1_EXTENSION_UNIT: strcpy(name, "Ext Unit"); return 8; case UAC_MIXER_UNIT: strcpy(name, "Mixer"); return 5; default: return sprintf(name, "Unit %d", iterm->id); } } switch (iterm->type & 0xff00) { case 0x0100: strcpy(name, "PCM"); return 3; case 0x0200: strcpy(name, "Mic"); return 3; case 0x0400: strcpy(name, "Headset"); return 7; case 0x0500: strcpy(name, "Phone"); return 5; } for (names = iterm_names; names->type; names++) { if (names->type == iterm->type) { strcpy(name, names->name); return strlen(names->name); } } return 0; } /* * parse the source unit recursively until it reaches to a terminal * or a branched unit. */ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term) { int err; void *p1; memset(term, 0, sizeof(*term)); while ((p1 = find_audio_control_unit(state, id)) != NULL) { unsigned char *hdr = p1; term->id = id; switch (hdr[2]) { case UAC_INPUT_TERMINAL: if (state->mixer->protocol == UAC_VERSION_1) { struct uac_input_terminal_descriptor *d = p1; term->type = le16_to_cpu(d->wTerminalType); term->channels = d->bNrChannels; term->chconfig = le16_to_cpu(d->wChannelConfig); term->name = d->iTerminal; } else { /* UAC_VERSION_2 */ struct uac2_input_terminal_descriptor *d = p1; term->type = le16_to_cpu(d->wTerminalType); term->channels = d->bNrChannels; term->chconfig = le32_to_cpu(d->bmChannelConfig); term->name = d->iTerminal; /* call recursively to get the clock selectors */ err = check_input_term(state, d->bCSourceID, term); if (err < 0) return err; } return 0; case UAC_FEATURE_UNIT: { /* the header is the same for v1 and v2 */ struct uac_feature_unit_descriptor *d = p1; id = d->bSourceID; break; /* continue to parse */ } case UAC_MIXER_UNIT: { struct uac_mixer_unit_descriptor *d = p1; term->type = d->bDescriptorSubtype << 16; /* virtual type */ term->channels = uac_mixer_unit_bNrChannels(d); term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); term->name = uac_mixer_unit_iMixer(d); return 0; } case UAC_SELECTOR_UNIT: case UAC2_CLOCK_SELECTOR: { struct uac_selector_unit_descriptor *d = p1; /* call recursively to retrieve the channel info */ err = check_input_term(state, d->baSourceID[0], term); if (err < 0) return err; term->type = d->bDescriptorSubtype << 16; /* virtual type */ term->id = id; term->name = uac_selector_unit_iSelector(d); return 0; } case UAC1_PROCESSING_UNIT: case UAC1_EXTENSION_UNIT: /* UAC2_PROCESSING_UNIT_V2 */ /* UAC2_EFFECT_UNIT */ case UAC2_EXTENSION_UNIT_V2: { struct uac_processing_unit_descriptor *d = p1; if (state->mixer->protocol == UAC_VERSION_2 && hdr[2] == UAC2_EFFECT_UNIT) { /* UAC2/UAC1 unit IDs overlap here in an * uncompatible way. Ignore this unit for now. */ return 0; } if (d->bNrInPins) { id = d->baSourceID[0]; break; /* continue to parse */ } term->type = d->bDescriptorSubtype << 16; /* virtual type */ term->channels = uac_processing_unit_bNrChannels(d); term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); return 0; } case UAC2_CLOCK_SOURCE: { struct uac_clock_source_descriptor *d = p1; term->type = d->bDescriptorSubtype << 16; /* virtual type */ term->id = id; term->name = d->iClockSource; return 0; } default: return -ENODEV; } } return -ENODEV; } /* * Feature Unit */ /* feature unit control information */ struct usb_feature_control_info { const char *name; unsigned int type; /* control type (mute, volume, etc.) */ }; static struct usb_feature_control_info audio_feature_info[] = { { "Mute", USB_MIXER_INV_BOOLEAN }, { "Volume", USB_MIXER_S16 }, { "Tone Control - Bass", USB_MIXER_S8 }, { "Tone Control - Mid", USB_MIXER_S8 }, { "Tone Control - Treble", USB_MIXER_S8 }, { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */ { "Auto Gain Control", USB_MIXER_BOOLEAN }, { "Delay Control", USB_MIXER_U16 }, { "Bass Boost", USB_MIXER_BOOLEAN }, { "Loudness", USB_MIXER_BOOLEAN }, /* UAC2 specific */ { "Input Gain Control", USB_MIXER_U16 }, { "Input Gain Pad Control", USB_MIXER_BOOLEAN }, { "Phase Inverter Control", USB_MIXER_BOOLEAN }, }; /* private_free callback */ static void usb_mixer_elem_free(struct snd_kcontrol *kctl) { kfree(kctl->private_data); kctl->private_data = NULL; } /* * interface to ALSA control for feature/mixer units */ /* volume control quirks */ static void volume_control_quirks(struct usb_mixer_elem_info *cval, struct snd_kcontrol *kctl) { struct snd_usb_audio *chip = cval->mixer->chip; switch (chip->usb_id) { case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ if (strcmp(kctl->id.name, "Effect Duration") == 0) { cval->min = 0x0000; cval->max = 0xffff; cval->res = 0x00e6; break; } if (strcmp(kctl->id.name, "Effect Volume") == 0 || strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { cval->min = 0x00; cval->max = 0xff; break; } if (strstr(kctl->id.name, "Effect Return") != NULL) { cval->min = 0xb706; cval->max = 0xff7b; cval->res = 0x0073; break; } if ((strstr(kctl->id.name, "Playback Volume") != NULL) || (strstr(kctl->id.name, "Effect Send") != NULL)) { cval->min = 0xb5fb; /* -73 dB = 0xb6ff */ cval->max = 0xfcfe; cval->res = 0x0073; } break; case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */ case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */ if (strcmp(kctl->id.name, "Effect Duration") == 0) { usb_audio_info(chip, "set quirk for FTU Effect Duration\n"); cval->min = 0x0000; cval->max = 0x7f00; cval->res = 0x0100; break; } if (strcmp(kctl->id.name, "Effect Volume") == 0 || strcmp(kctl->id.name, "Effect Feedback Volume") == 0) { usb_audio_info(chip, "set quirks for FTU Effect Feedback/Volume\n"); cval->min = 0x00; cval->max = 0x7f; break; } break; case USB_ID(0x0471, 0x0101): case USB_ID(0x0471, 0x0104): case USB_ID(0x0471, 0x0105): case USB_ID(0x0672, 0x1041): /* quirk for UDA1321/N101. * note that detection between firmware 2.1.1.7 (N101) * and later 2.1.1.21 is not very clear from datasheets. * I hope that the min value is -15360 for newer firmware --jk */ if (!strcmp(kctl->id.name, "PCM Playback Volume") && cval->min == -15616) { usb_audio_info(chip, "set volume quirk for UDA1321/N101 chip\n"); cval->max = -256; } break; case USB_ID(0x046d, 0x09a4): if (!strcmp(kctl->id.name, "Mic Capture Volume")) { usb_audio_info(chip, "set volume quirk for QuickCam E3500\n"); cval->min = 6080; cval->max = 8768; cval->res = 192; } break; case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */ case USB_ID(0x046d, 0x0808): case USB_ID(0x046d, 0x0809): case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */ case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */ case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */ case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */ case USB_ID(0x046d, 0x0991): /* Most audio usb devices lie about volume resolution. * Most Logitech webcams have res = 384. * Proboly there is some logitech magic behind this number --fishor */ if (!strcmp(kctl->id.name, "Mic Capture Volume")) { usb_audio_info(chip, "set resolution quirk: cval->res = 384\n"); cval->res = 384; } break; } } /* * retrieve the minimum and maximum values for the specified control */ static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval, int default_min, struct snd_kcontrol *kctl) { /* for failsafe */ cval->min = default_min; cval->max = cval->min + 1; cval->res = 1; cval->dBmin = cval->dBmax = 0; if (cval->val_type == USB_MIXER_BOOLEAN || cval->val_type == USB_MIXER_INV_BOOLEAN) { cval->initialized = 1; } else { int minchn = 0; if (cval->cmask) { int i; for (i = 0; i < MAX_CHANNELS; i++) if (cval->cmask & (1 << i)) { minchn = i + 1; break; } } if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { usb_audio_err(cval->mixer->chip, "%d:%d: cannot get min/max values for control %d (id %d)\n", cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id); return -EINVAL; } if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) { cval->res = 1; } else { int last_valid_res = cval->res; while (cval->res > 1) { if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0) break; cval->res /= 2; } if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) cval->res = last_valid_res; } if (cval->res == 0) cval->res = 1; /* Additional checks for the proper resolution * * Some devices report smaller resolutions than actually * reacting. They don't return errors but simply clip * to the lower aligned value. */ if (cval->min + cval->res < cval->max) { int last_valid_res = cval->res; int saved, test, check; get_cur_mix_raw(cval, minchn, &saved); for (;;) { test = saved; if (test < cval->max) test += cval->res; else test -= cval->res; if (test < cval->min || test > cval->max || set_cur_mix_value(cval, minchn, 0, test) || get_cur_mix_raw(cval, minchn, &check)) { cval->res = last_valid_res; break; } if (test == check) break; cval->res *= 2; } set_cur_mix_value(cval, minchn, 0, saved); } cval->initialized = 1; } if (kctl) volume_control_quirks(cval, kctl); /* USB descriptions contain the dB scale in 1/256 dB unit * while ALSA TLV contains in 1/100 dB unit */ cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; if (cval->dBmin > cval->dBmax) { /* something is wrong; assume it's either from/to 0dB */ if (cval->dBmin < 0) cval->dBmax = 0; else if (cval->dBmin > 0) cval->dBmin = 0; if (cval->dBmin > cval->dBmax) { /* totally crap, return an error */ return -EINVAL; } } return 0; } #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) /* get a feature/mixer unit info */ static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct usb_mixer_elem_info *cval = kcontrol->private_data; if (cval->val_type == USB_MIXER_BOOLEAN || cval->val_type == USB_MIXER_INV_BOOLEAN) uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; else uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; uinfo->count = cval->channels; if (cval->val_type == USB_MIXER_BOOLEAN || cval->val_type == USB_MIXER_INV_BOOLEAN) { uinfo->value.integer.min = 0; uinfo->value.integer.max = 1; } else { if (!cval->initialized) { get_min_max_with_quirks(cval, 0, kcontrol); if (cval->initialized && cval->dBmin >= cval->dBmax) { kcontrol->vd[0].access &= ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); snd_ctl_notify(cval->mixer->chip->card, SNDRV_CTL_EVENT_MASK_INFO, &kcontrol->id); } } uinfo->value.integer.min = 0; uinfo->value.integer.max = (cval->max - cval->min + cval->res - 1) / cval->res; } return 0; } /* get the current value from feature/mixer unit */ static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int c, cnt, val, err; ucontrol->value.integer.value[0] = cval->min; if (cval->cmask) { cnt = 0; for (c = 0; c < MAX_CHANNELS; c++) { if (!(cval->cmask & (1 << c))) continue; err = get_cur_mix_value(cval, c + 1, cnt, &val); if (err < 0) return cval->mixer->ignore_ctl_error ? 0 : err; val = get_relative_value(cval, val); ucontrol->value.integer.value[cnt] = val; cnt++; } return 0; } else { /* master channel */ err = get_cur_mix_value(cval, 0, 0, &val); if (err < 0) return cval->mixer->ignore_ctl_error ? 0 : err; val = get_relative_value(cval, val); ucontrol->value.integer.value[0] = val; } return 0; } /* put the current value to feature/mixer unit */ static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int c, cnt, val, oval, err; int changed = 0; if (cval->cmask) { cnt = 0; for (c = 0; c < MAX_CHANNELS; c++) { if (!(cval->cmask & (1 << c))) continue; err = get_cur_mix_value(cval, c + 1, cnt, &oval); if (err < 0) return cval->mixer->ignore_ctl_error ? 0 : err; val = ucontrol->value.integer.value[cnt]; val = get_abs_value(cval, val); if (oval != val) { set_cur_mix_value(cval, c + 1, cnt, val); changed = 1; } cnt++; } } else { /* master channel */ err = get_cur_mix_value(cval, 0, 0, &oval); if (err < 0) return cval->mixer->ignore_ctl_error ? 0 : err; val = ucontrol->value.integer.value[0]; val = get_abs_value(cval, val); if (val != oval) { set_cur_mix_value(cval, 0, 0, val); changed = 1; } } return changed; } static struct snd_kcontrol_new usb_feature_unit_ctl = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "", /* will be filled later manually */ .info = mixer_ctl_feature_info, .get = mixer_ctl_feature_get, .put = mixer_ctl_feature_put, }; /* the read-only variant */ static struct snd_kcontrol_new usb_feature_unit_ctl_ro = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "", /* will be filled later manually */ .info = mixer_ctl_feature_info, .get = mixer_ctl_feature_get, .put = NULL, }; /* * This symbol is exported in order to allow the mixer quirks to * hook up to the standard feature unit control mechanism */ struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; /* * build a feature control */ static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) { return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); } /* * A lot of headsets/headphones have a "Speaker" mixer. Make sure we * rename it to "Headphone". We determine if something is a headphone * similar to how udev determines form factor. */ static void check_no_speaker_on_headset(struct snd_kcontrol *kctl, struct snd_card *card) { const char *names_to_check[] = { "Headset", "headset", "Headphone", "headphone", NULL}; const char **s; bool found = false; if (strcmp("Speaker", kctl->id.name)) return; for (s = names_to_check; *s; s++) if (strstr(card->shortname, *s)) { found = true; break; } if (!found) return; strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name)); } static void build_feature_ctl(struct mixer_build *state, void *raw_desc, unsigned int ctl_mask, int control, struct usb_audio_term *iterm, int unitid, int readonly_mask) { struct uac_feature_unit_descriptor *desc = raw_desc; unsigned int len = 0; int mapped_name = 0; int nameid = uac_feature_unit_iFeature(desc); struct snd_kcontrol *kctl; struct usb_mixer_elem_info *cval; const struct usbmix_name_map *map; unsigned int range; control++; /* change from zero-based to 1-based value */ if (control == UAC_FU_GRAPHIC_EQUALIZER) { /* FIXME: not supported yet */ return; } map = find_map(state, unitid, control); if (check_ignored_ctl(map)) return; cval = kzalloc(sizeof(*cval), GFP_KERNEL); if (!cval) return; cval->mixer = state->mixer; cval->id = unitid; cval->control = control; cval->cmask = ctl_mask; cval->val_type = audio_feature_info[control-1].type; if (ctl_mask == 0) { cval->channels = 1; /* master channel */ cval->master_readonly = readonly_mask; } else { int i, c = 0; for (i = 0; i < 16; i++) if (ctl_mask & (1 << i)) c++; cval->channels = c; cval->ch_readonly = readonly_mask; } /* * If all channels in the mask are marked read-only, make the control * read-only. set_cur_mix_value() will check the mask again and won't * issue write commands to read-only channels. */ if (cval->channels == readonly_mask) kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); else kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); if (!kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); kfree(cval); return; } kctl->private_free = usb_mixer_elem_free; len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); mapped_name = len != 0; if (!len && nameid) len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); switch (control) { case UAC_FU_MUTE: case UAC_FU_VOLUME: /* * determine the control name. the rule is: * - if a name id is given in descriptor, use it. * - if the connected input can be determined, then use the name * of terminal type. * - if the connected output can be determined, use it. * - otherwise, anonymous name. */ if (!len) { len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1); if (!len) len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1); if (!len) len = snprintf(kctl->id.name, sizeof(kctl->id.name), "Feature %d", unitid); } if (!mapped_name) check_no_speaker_on_headset(kctl, state->mixer->chip->card); /* * determine the stream direction: * if the connected output is USB stream, then it's likely a * capture stream. otherwise it should be playback (hopefully :) */ if (!mapped_name && !(state->oterm.type >> 16)) { if ((state->oterm.type & 0xff00) == 0x0100) len = append_ctl_name(kctl, " Capture"); else len = append_ctl_name(kctl, " Playback"); } append_ctl_name(kctl, control == UAC_FU_MUTE ? " Switch" : " Volume"); break; default: if (!len) strlcpy(kctl->id.name, audio_feature_info[control-1].name, sizeof(kctl->id.name)); break; } /* get min/max values */ get_min_max_with_quirks(cval, 0, kctl); if (control == UAC_FU_VOLUME) { check_mapped_dB(map, cval); if (cval->dBmin < cval->dBmax || !cval->initialized) { kctl->tlv.c = snd_usb_mixer_vol_tlv; kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ | SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; } } range = (cval->max - cval->min) / cval->res; /* * Are there devices with volume range more than 255? I use a bit more * to be sure. 384 is a resolution magic number found on Logitech * devices. It will definitively catch all buggy Logitech devices. */ if (range > 384) { usb_audio_warn(state->chip, "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", range); usb_audio_warn(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d", cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res); } usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res); snd_usb_mixer_add_control(state->mixer, kctl); } /* * parse a feature unit * * most of controls are defined here. */ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr) { int channels, i, j; struct usb_audio_term iterm; unsigned int master_bits, first_ch_bits; int err, csize; struct uac_feature_unit_descriptor *hdr = _ftr; __u8 *bmaControls; if (state->mixer->protocol == UAC_VERSION_1) { csize = hdr->bControlSize; if (!csize) { usb_audio_dbg(state->chip, "unit %u: invalid bControlSize == 0\n", unitid); return -EINVAL; } channels = (hdr->bLength - 7) / csize - 1; bmaControls = hdr->bmaControls; if (hdr->bLength < 7 + csize) { usb_audio_err(state->chip, "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid); return -EINVAL; } } else { struct uac2_feature_unit_descriptor *ftr = _ftr; csize = 4; channels = (hdr->bLength - 6) / 4 - 1; bmaControls = ftr->bmaControls; if (hdr->bLength < 6 + csize) { usb_audio_err(state->chip, "unit %u: invalid UAC_FEATURE_UNIT descriptor\n", unitid); return -EINVAL; } } /* parse the source unit */ if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0) return err; /* determine the input source type and name */ err = check_input_term(state, hdr->bSourceID, &iterm); if (err < 0) return err; master_bits = snd_usb_combine_bytes(bmaControls, csize); /* master configuration quirks */ switch (state->chip->usb_id) { case USB_ID(0x08bb, 0x2702): usb_audio_info(state->chip, "usbmixer: master volume quirk for PCM2702 chip\n"); /* disable non-functional volume control */ master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); break; case USB_ID(0x1130, 0xf211): usb_audio_info(state->chip, "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n"); /* disable non-functional volume control */ channels = 0; break; } if (channels > 0) first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize); else first_ch_bits = 0; if (state->mixer->protocol == UAC_VERSION_1) { /* check all control types */ for (i = 0; i < 10; i++) { unsigned int ch_bits = 0; for (j = 0; j < channels; j++) { unsigned int mask; mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize); if (mask & (1 << i)) ch_bits |= (1 << j); } /* audio class v1 controls are never read-only */ /* * The first channel must be set * (for ease of programming). */ if (ch_bits & 1) build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, 0); if (master_bits & (1 << i)) build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, 0); } } else { /* UAC_VERSION_2 */ for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { unsigned int ch_bits = 0; unsigned int ch_read_only = 0; for (j = 0; j < channels; j++) { unsigned int mask; mask = snd_usb_combine_bytes(bmaControls + csize * (j+1), csize); if (uac2_control_is_readable(mask, i)) { ch_bits |= (1 << j); if (!uac2_control_is_writeable(mask, i)) ch_read_only |= (1 << j); } } /* * NOTE: build_feature_ctl() will mark the control * read-only if all channels are marked read-only in * the descriptors. Otherwise, the control will be * reported as writeable, but the driver will not * actually issue a write command for read-only * channels. */ /* * The first channel must be set * (for ease of programming). */ if (ch_bits & 1) build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only); if (uac2_control_is_readable(master_bits, i)) build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, !uac2_control_is_writeable(master_bits, i)); } } return 0; } /* * Mixer Unit */ /* * build a mixer unit control * * the callbacks are identical with feature unit. * input channel number (zero based) is given in control field instead. */ static void build_mixer_unit_ctl(struct mixer_build *state, struct uac_mixer_unit_descriptor *desc, int in_pin, int in_ch, int unitid, struct usb_audio_term *iterm) { struct usb_mixer_elem_info *cval; unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); unsigned int i, len; struct snd_kcontrol *kctl; const struct usbmix_name_map *map; map = find_map(state, unitid, 0); if (check_ignored_ctl(map)) return; cval = kzalloc(sizeof(*cval), GFP_KERNEL); if (!cval) return; cval->mixer = state->mixer; cval->id = unitid; cval->control = in_ch + 1; /* based on 1 */ cval->val_type = USB_MIXER_S16; for (i = 0; i < num_outs; i++) { __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); if (check_matrix_bitmap(c, in_ch, i, num_outs)) { cval->cmask |= (1 << i); cval->channels++; } } /* get min/max values */ get_min_max(cval, 0); kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); if (!kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); kfree(cval); return; } kctl->private_free = usb_mixer_elem_free; len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); if (!len) len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 0); if (!len) len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1); append_ctl_name(kctl, " Volume"); usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n", cval->id, kctl->id.name, cval->channels, cval->min, cval->max); snd_usb_mixer_add_control(state->mixer, kctl); } /* * parse a mixer unit */ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc) { struct uac_mixer_unit_descriptor *desc = raw_desc; struct usb_audio_term iterm; int input_pins, num_ins, num_outs; int pin, ich, err; if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) || !(num_outs = uac_mixer_unit_bNrChannels(desc))) { usb_audio_err(state->chip, "invalid MIXER UNIT descriptor %d\n", unitid); return -EINVAL; } /* no bmControls field (e.g. Maya44) -> ignore */ if (desc->bLength <= 10 + input_pins) { usb_audio_dbg(state->chip, "MU %d has no bmControls field\n", unitid); return 0; } num_ins = 0; ich = 0; for (pin = 0; pin < input_pins; pin++) { err = parse_audio_unit(state, desc->baSourceID[pin]); if (err < 0) continue; err = check_input_term(state, desc->baSourceID[pin], &iterm); if (err < 0) return err; num_ins += iterm.channels; for (; ich < num_ins; ich++) { int och, ich_has_controls = 0; for (och = 0; och < num_outs; och++) { __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol); if (check_matrix_bitmap(c, ich, och, num_outs)) { ich_has_controls = 1; break; } } if (ich_has_controls) build_mixer_unit_ctl(state, desc, pin, ich, unitid, &iterm); } } return 0; } /* * Processing Unit / Extension Unit */ /* get callback for processing/extension unit */ static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int err, val; err = get_cur_ctl_value(cval, cval->control << 8, &val); if (err < 0 && cval->mixer->ignore_ctl_error) { ucontrol->value.integer.value[0] = cval->min; return 0; } if (err < 0) return err; val = get_relative_value(cval, val); ucontrol->value.integer.value[0] = val; return 0; } /* put callback for processing/extension unit */ static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int val, oval, err; err = get_cur_ctl_value(cval, cval->control << 8, &oval); if (err < 0) { if (cval->mixer->ignore_ctl_error) return 0; return err; } val = ucontrol->value.integer.value[0]; val = get_abs_value(cval, val); if (val != oval) { set_cur_ctl_value(cval, cval->control << 8, val); return 1; } return 0; } /* alsa control interface for processing/extension unit */ static struct snd_kcontrol_new mixer_procunit_ctl = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "", /* will be filled later */ .info = mixer_ctl_feature_info, .get = mixer_ctl_procunit_get, .put = mixer_ctl_procunit_put, }; /* * predefined data for processing units */ struct procunit_value_info { int control; char *suffix; int val_type; int min_value; }; struct procunit_info { int type; char *name; struct procunit_value_info *values; }; static struct procunit_value_info updown_proc_info[] = { { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, { 0 } }; static struct procunit_value_info prologic_proc_info[] = { { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, { 0 } }; static struct procunit_value_info threed_enh_proc_info[] = { { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, { 0 } }; static struct procunit_value_info reverb_proc_info[] = { { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, { 0 } }; static struct procunit_value_info chorus_proc_info[] = { { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, { 0 } }; static struct procunit_value_info dcr_proc_info[] = { { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, { 0 } }; static struct procunit_info procunits[] = { { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, { 0 }, }; /* * predefined data for extension units */ static struct procunit_value_info clock_rate_xu_info[] = { { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, { 0 } }; static struct procunit_value_info clock_source_xu_info[] = { { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, { 0 } }; static struct procunit_value_info spdif_format_xu_info[] = { { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, { 0 } }; static struct procunit_value_info soft_limit_xu_info[] = { { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, { 0 } }; static struct procunit_info extunits[] = { { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, { 0 } }; /* * build a processing/extension unit */ static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name) { struct uac_processing_unit_descriptor *desc = raw_desc; int num_ins = desc->bNrInPins; struct usb_mixer_elem_info *cval; struct snd_kcontrol *kctl; int i, err, nameid, type, len; struct procunit_info *info; struct procunit_value_info *valinfo; const struct usbmix_name_map *map; static struct procunit_value_info default_value_info[] = { { 0x01, "Switch", USB_MIXER_BOOLEAN }, { 0 } }; static struct procunit_info default_info = { 0, NULL, default_value_info }; if (desc->bLength < 13 || desc->bLength < 13 + num_ins || desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid); return -EINVAL; } for (i = 0; i < num_ins; i++) { if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) return err; } type = le16_to_cpu(desc->wProcessType); for (info = list; info && info->type; info++) if (info->type == type) break; if (!info || !info->type) info = &default_info; for (valinfo = info->values; valinfo->control; valinfo++) { __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol); if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1)))) continue; map = find_map(state, unitid, valinfo->control); if (check_ignored_ctl(map)) continue; cval = kzalloc(sizeof(*cval), GFP_KERNEL); if (!cval) return -ENOMEM; cval->mixer = state->mixer; cval->id = unitid; cval->control = valinfo->control; cval->val_type = valinfo->val_type; cval->channels = 1; /* get min/max values */ if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); /* FIXME: hard-coded */ cval->min = 1; cval->max = control_spec[0]; cval->res = 1; cval->initialized = 1; } else { if (type == USB_XU_CLOCK_RATE) { /* * E-Mu USB 0404/0202/TrackerPre/0204 * samplerate control quirk */ cval->min = 0; cval->max = 5; cval->res = 1; cval->initialized = 1; } else get_min_max(cval, valinfo->min_value); } kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); if (!kctl) { kfree(cval); return -ENOMEM; } kctl->private_free = usb_mixer_elem_free; if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) { /* nothing */ ; } else if (info->name) { strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); } else { nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); len = 0; if (nameid) len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); if (!len) strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); } append_ctl_name(kctl, " "); append_ctl_name(kctl, valinfo->suffix); usb_audio_dbg(state->chip, "[%d] PU [%s] ch = %d, val = %d/%d\n", cval->id, kctl->id.name, cval->channels, cval->min, cval->max); err = snd_usb_mixer_add_control(state->mixer, kctl); if (err < 0) return err; } return 0; } static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc) { return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit"); } static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc) { /* * Note that we parse extension units with processing unit descriptors. * That's ok as the layout is the same. */ return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit"); } /* * Selector Unit */ /* * info callback for selector unit * use an enumerator type for routing */ static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { struct usb_mixer_elem_info *cval = kcontrol->private_data; const char **itemlist = (const char **)kcontrol->private_value; if (snd_BUG_ON(!itemlist)) return -EINVAL; return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); } /* get callback for selector unit */ static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int val, err; err = get_cur_ctl_value(cval, cval->control << 8, &val); if (err < 0) { if (cval->mixer->ignore_ctl_error) { ucontrol->value.enumerated.item[0] = 0; return 0; } return err; } val = get_relative_value(cval, val); ucontrol->value.enumerated.item[0] = val; return 0; } /* put callback for selector unit */ static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { struct usb_mixer_elem_info *cval = kcontrol->private_data; int val, oval, err; err = get_cur_ctl_value(cval, cval->control << 8, &oval); if (err < 0) { if (cval->mixer->ignore_ctl_error) return 0; return err; } val = ucontrol->value.enumerated.item[0]; val = get_abs_value(cval, val); if (val != oval) { set_cur_ctl_value(cval, cval->control << 8, val); return 1; } return 0; } /* alsa control interface for selector unit */ static struct snd_kcontrol_new mixer_selectunit_ctl = { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = "", /* will be filled later */ .info = mixer_ctl_selector_info, .get = mixer_ctl_selector_get, .put = mixer_ctl_selector_put, }; /* * private free callback. * free both private_data and private_value */ static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) { int i, num_ins = 0; if (kctl->private_data) { struct usb_mixer_elem_info *cval = kctl->private_data; num_ins = cval->max; kfree(cval); kctl->private_data = NULL; } if (kctl->private_value) { char **itemlist = (char **)kctl->private_value; for (i = 0; i < num_ins; i++) kfree(itemlist[i]); kfree(itemlist); kctl->private_value = 0; } } /* * parse a selector unit */ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc) { struct uac_selector_unit_descriptor *desc = raw_desc; unsigned int i, nameid, len; int err; struct usb_mixer_elem_info *cval; struct snd_kcontrol *kctl; const struct usbmix_name_map *map; char **namelist; if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { usb_audio_err(state->chip, "invalid SELECTOR UNIT descriptor %d\n", unitid); return -EINVAL; } for (i = 0; i < desc->bNrInPins; i++) { if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0) return err; } if (desc->bNrInPins == 1) /* only one ? nonsense! */ return 0; map = find_map(state, unitid, 0); if (check_ignored_ctl(map)) return 0; cval = kzalloc(sizeof(*cval), GFP_KERNEL); if (!cval) return -ENOMEM; cval->mixer = state->mixer; cval->id = unitid; cval->val_type = USB_MIXER_U8; cval->channels = 1; cval->min = 1; cval->max = desc->bNrInPins; cval->res = 1; cval->initialized = 1; if (state->mixer->protocol == UAC_VERSION_1) cval->control = 0; else /* UAC_VERSION_2 */ cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ? UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR; namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); if (!namelist) { kfree(cval); return -ENOMEM; } #define MAX_ITEM_NAME_LEN 64 for (i = 0; i < desc->bNrInPins; i++) { struct usb_audio_term iterm; len = 0; namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); if (!namelist[i]) { while (i--) kfree(namelist[i]); kfree(namelist); kfree(cval); return -ENOMEM; } len = check_mapped_selector_name(state, unitid, i, namelist[i], MAX_ITEM_NAME_LEN); if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0) len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); if (! len) sprintf(namelist[i], "Input %u", i); } kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); if (! kctl) { usb_audio_err(state->chip, "cannot malloc kcontrol\n"); kfree(namelist); kfree(cval); return -ENOMEM; } kctl->private_value = (unsigned long)namelist; kctl->private_free = usb_mixer_selector_elem_free; nameid = uac_selector_unit_iSelector(desc); len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); if (len) ; else if (nameid) snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); else { len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 0); if (!len) strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name)); if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) append_ctl_name(kctl, " Clock Source"); else if ((state->oterm.type & 0xff00) == 0x0100) append_ctl_name(kctl, " Capture Source"); else append_ctl_name(kctl, " Playback Source"); } usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n", cval->id, kctl->id.name, desc->bNrInPins); if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0) return err; return 0; } /* * parse an audio unit recursively */ static int parse_audio_unit(struct mixer_build *state, int unitid) { unsigned char *p1; if (test_and_set_bit(unitid, state->unitbitmap)) return 0; /* the unit already visited */ p1 = find_audio_control_unit(state, unitid); if (!p1) { usb_audio_err(state->chip, "unit %d not found!\n", unitid); return -EINVAL; } switch (p1[2]) { case UAC_INPUT_TERMINAL: case UAC2_CLOCK_SOURCE: return 0; /* NOP */ case UAC_MIXER_UNIT: return parse_audio_mixer_unit(state, unitid, p1); case UAC_SELECTOR_UNIT: case UAC2_CLOCK_SELECTOR: return parse_audio_selector_unit(state, unitid, p1); case UAC_FEATURE_UNIT: return parse_audio_feature_unit(state, unitid, p1); case UAC1_PROCESSING_UNIT: /* UAC2_EFFECT_UNIT has the same value */ if (state->mixer->protocol == UAC_VERSION_1) return parse_audio_processing_unit(state, unitid, p1); else return 0; /* FIXME - effect units not implemented yet */ case UAC1_EXTENSION_UNIT: /* UAC2_PROCESSING_UNIT_V2 has the same value */ if (state->mixer->protocol == UAC_VERSION_1) return parse_audio_extension_unit(state, unitid, p1); else /* UAC_VERSION_2 */ return parse_audio_processing_unit(state, unitid, p1); case UAC2_EXTENSION_UNIT_V2: return parse_audio_extension_unit(state, unitid, p1); default: usb_audio_err(state->chip, "unit %u: unexpected type 0x%02x\n", unitid, p1[2]); return -EINVAL; } } static void snd_usb_mixer_free(struct usb_mixer_interface *mixer) { kfree(mixer->id_elems); if (mixer->urb) { kfree(mixer->urb->transfer_buffer); usb_free_urb(mixer->urb); } usb_free_urb(mixer->rc_urb); kfree(mixer->rc_setup_packet); kfree(mixer); } static int snd_usb_mixer_dev_free(struct snd_device *device) { struct usb_mixer_interface *mixer = device->device_data; snd_usb_mixer_free(mixer); return 0; } /* * create mixer controls * * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers */ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer) { struct mixer_build state; int err; const struct usbmix_ctl_map *map; void *p; memset(&state, 0, sizeof(state)); state.chip = mixer->chip; state.mixer = mixer; state.buffer = mixer->hostif->extra; state.buflen = mixer->hostif->extralen; /* check the mapping table */ for (map = usbmix_ctl_maps; map->id; map++) { if (map->id == state.chip->usb_id) { state.map = map->map; state.selector_map = map->selector_map; mixer->ignore_ctl_error = map->ignore_ctl_error; break; } } p = NULL; while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, mixer->hostif->extralen, p, UAC_OUTPUT_TERMINAL)) != NULL) { if (mixer->protocol == UAC_VERSION_1) { struct uac1_output_terminal_descriptor *desc = p; if (desc->bLength < sizeof(*desc)) continue; /* invalid descriptor? */ /* mark terminal ID as visited */ set_bit(desc->bTerminalID, state.unitbitmap); state.oterm.id = desc->bTerminalID; state.oterm.type = le16_to_cpu(desc->wTerminalType); state.oterm.name = desc->iTerminal; err = parse_audio_unit(&state, desc->bSourceID); if (err < 0 && err != -EINVAL) return err; } else { /* UAC_VERSION_2 */ struct uac2_output_terminal_descriptor *desc = p; if (desc->bLength < sizeof(*desc)) continue; /* invalid descriptor? */ /* mark terminal ID as visited */ set_bit(desc->bTerminalID, state.unitbitmap); state.oterm.id = desc->bTerminalID; state.oterm.type = le16_to_cpu(desc->wTerminalType); state.oterm.name = desc->iTerminal; err = parse_audio_unit(&state, desc->bSourceID); if (err < 0 && err != -EINVAL) return err; /* * For UAC2, use the same approach to also add the * clock selectors */ err = parse_audio_unit(&state, desc->bCSourceID); if (err < 0 && err != -EINVAL) return err; } } return 0; } void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) { struct usb_mixer_elem_info *info; for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, info->elem_id); } static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, int unitid, struct usb_mixer_elem_info *cval) { static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", "S8", "U8", "S16", "U16"}; snd_iprintf(buffer, " Unit: %i\n", unitid); if (cval->elem_id) snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n", cval->elem_id->name, cval->elem_id->index); snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " "channels=%i, type=\"%s\"\n", cval->id, cval->control, cval->cmask, cval->channels, val_types[cval->val_type]); snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", cval->min, cval->max, cval->dBmin, cval->dBmax); } static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { struct snd_usb_audio *chip = entry->private_data; struct usb_mixer_interface *mixer; struct usb_mixer_elem_info *cval; int unitid; list_for_each_entry(mixer, &chip->mixer_list, list) { snd_iprintf(buffer, "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", chip->usb_id, snd_usb_ctrl_intf(chip), mixer->ignore_ctl_error); snd_iprintf(buffer, "Card: %s\n", chip->card->longname); for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { for (cval = mixer->id_elems[unitid]; cval; cval = cval->next_id_elem) snd_usb_mixer_dump_cval(buffer, unitid, cval); } } } static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, int attribute, int value, int index) { struct usb_mixer_elem_info *info; __u8 unitid = (index >> 8) & 0xff; __u8 control = (value >> 8) & 0xff; __u8 channel = value & 0xff; if (channel >= MAX_CHANNELS) { usb_audio_dbg(mixer->chip, "%s(): bogus channel number %d\n", __func__, channel); return; } for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) { if (info->control != control) continue; switch (attribute) { case UAC2_CS_CUR: /* invalidate cache, so the value is read from the device */ if (channel) info->cached &= ~(1 << channel); else /* master channel */ info->cached = 0; snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, info->elem_id); break; case UAC2_CS_RANGE: /* TODO */ break; case UAC2_CS_MEM: /* TODO */ break; default: usb_audio_dbg(mixer->chip, "unknown attribute %d in interrupt\n", attribute); break; } /* switch */ } } static void snd_usb_mixer_interrupt(struct urb *urb) { struct usb_mixer_interface *mixer = urb->context; int len = urb->actual_length; int ustatus = urb->status; if (ustatus != 0) goto requeue; if (mixer->protocol == UAC_VERSION_1) { struct uac1_status_word *status; for (status = urb->transfer_buffer; len >= sizeof(*status); len -= sizeof(*status), status++) { dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n", status->bStatusType, status->bOriginator); /* ignore any notifications not from the control interface */ if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) continue; if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); else snd_usb_mixer_notify_id(mixer, status->bOriginator); } } else { /* UAC_VERSION_2 */ struct uac2_interrupt_data_msg *msg; for (msg = urb->transfer_buffer; len >= sizeof(*msg); len -= sizeof(*msg), msg++) { /* drop vendor specific and endpoint requests */ if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) continue; snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, le16_to_cpu(msg->wValue), le16_to_cpu(msg->wIndex)); } } requeue: if (ustatus != -ENOENT && ustatus != -ECONNRESET && ustatus != -ESHUTDOWN) { urb->dev = mixer->chip->dev; usb_submit_urb(urb, GFP_ATOMIC); } } /* create the handler for the optional status interrupt endpoint */ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) { struct usb_endpoint_descriptor *ep; void *transfer_buffer; int buffer_length; unsigned int epnum; /* we need one interrupt input endpoint */ if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1) return 0; ep = get_endpoint(mixer->hostif, 0); if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep)) return 0; epnum = usb_endpoint_num(ep); buffer_length = le16_to_cpu(ep->wMaxPacketSize); transfer_buffer = kmalloc(buffer_length, GFP_KERNEL); if (!transfer_buffer) return -ENOMEM; mixer->urb = usb_alloc_urb(0, GFP_KERNEL); if (!mixer->urb) { kfree(transfer_buffer); return -ENOMEM; } usb_fill_int_urb(mixer->urb, mixer->chip->dev, usb_rcvintpipe(mixer->chip->dev, epnum), transfer_buffer, buffer_length, snd_usb_mixer_interrupt, mixer, ep->bInterval); usb_submit_urb(mixer->urb, GFP_KERNEL); return 0; } int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif, int ignore_error) { static struct snd_device_ops dev_ops = { .dev_free = snd_usb_mixer_dev_free }; struct usb_mixer_interface *mixer; struct snd_info_entry *entry; int err; strcpy(chip->card->mixername, "USB Mixer"); mixer = kzalloc(sizeof(*mixer), GFP_KERNEL); if (!mixer) return -ENOMEM; mixer->chip = chip; mixer->ignore_ctl_error = ignore_error; mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems), GFP_KERNEL); if (!mixer->id_elems) { kfree(mixer); return -ENOMEM; } mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) { case UAC_VERSION_1: default: mixer->protocol = UAC_VERSION_1; break; case UAC_VERSION_2: mixer->protocol = UAC_VERSION_2; break; } if ((err = snd_usb_mixer_controls(mixer)) < 0 || (err = snd_usb_mixer_status_create(mixer)) < 0) goto _error; snd_usb_mixer_apply_create_quirk(mixer); err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops); if (err < 0) goto _error; if (list_empty(&chip->mixer_list) && !snd_card_proc_new(chip->card, "usbmixer", &entry)) snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); list_add(&mixer->list, &chip->mixer_list); return 0; _error: snd_usb_mixer_free(mixer); return err; } void snd_usb_mixer_disconnect(struct list_head *p) { struct usb_mixer_interface *mixer; mixer = list_entry(p, struct usb_mixer_interface, list); usb_kill_urb(mixer->urb); usb_kill_urb(mixer->rc_urb); } #ifdef CONFIG_PM /* stop any bus activity of a mixer */ static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) { usb_kill_urb(mixer->urb); usb_kill_urb(mixer->rc_urb); } static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer) { int err; if (mixer->urb) { err = usb_submit_urb(mixer->urb, GFP_NOIO); if (err < 0) return err; } return 0; } int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer) { snd_usb_mixer_inactivate(mixer); return 0; } static int restore_mixer_value(struct usb_mixer_elem_info *cval) { int c, err, idx; if (cval->cmask) { idx = 0; for (c = 0; c < MAX_CHANNELS; c++) { if (!(cval->cmask & (1 << c))) continue; if (cval->cached & (1 << c)) { err = set_cur_mix_value(cval, c + 1, idx, cval->cache_val[idx]); if (err < 0) return err; } idx++; } } else { /* master */ if (cval->cached) { err = set_cur_mix_value(cval, 0, 0, *cval->cache_val); if (err < 0) return err; } } return 0; } int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume) { struct usb_mixer_elem_info *cval; int id, err; /* FIXME: any mixer quirks? */ if (reset_resume) { /* restore cached mixer values */ for (id = 0; id < MAX_ID_ELEMS; id++) { for (cval = mixer->id_elems[id]; cval; cval = cval->next_id_elem) { err = restore_mixer_value(cval); if (err < 0) return err; } } } return snd_usb_mixer_activate(mixer); } #endif