diff options
Diffstat (limited to 'sound/usb/usbmixer.c')
| -rw-r--r-- | sound/usb/usbmixer.c | 1545 |
1 files changed, 1545 insertions, 0 deletions
diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c new file mode 100644 index 000000000000..5f1906915aa6 --- /dev/null +++ b/sound/usb/usbmixer.c @@ -0,0 +1,1545 @@ +/* + * (Tentative) USB Audio Driver for ALSA + * + * Mixer control part + * + * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de> + * + * 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 + * + */ + +#include <sound/driver.h> +#include <linux/bitops.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/usb.h> +#include <sound/core.h> +#include <sound/control.h> + +#include "usbaudio.h" + + +/* + */ + +/* ignore error from controls - for debugging */ +/* #define IGNORE_CTL_ERROR */ + +typedef struct usb_mixer_build mixer_build_t; +typedef struct usb_audio_term usb_audio_term_t; +typedef struct usb_mixer_elem_info usb_mixer_elem_info_t; + + +struct usb_audio_term { + int id; + int type; + int channels; + unsigned int chconfig; + int name; +}; + +struct usbmix_name_map; + +struct usb_mixer_build { + snd_usb_audio_t *chip; + unsigned char *buffer; + unsigned int buflen; + unsigned int ctrlif; + unsigned short vendor; + unsigned short product; + DECLARE_BITMAP(unitbitmap, 32*32); + usb_audio_term_t oterm; + const struct usbmix_name_map *map; +}; + +struct usb_mixer_elem_info { + snd_usb_audio_t *chip; + unsigned int ctrlif; + unsigned int id; + unsigned int control; /* CS or ICN (high byte) */ + unsigned int cmask; /* channel mask bitmap: 0 = master */ + int channels; + int val_type; + int min, max, res; + unsigned int initialized: 1; +}; + + +enum { + USB_FEATURE_NONE = 0, + USB_FEATURE_MUTE = 1, + USB_FEATURE_VOLUME, + USB_FEATURE_BASS, + USB_FEATURE_MID, + USB_FEATURE_TREBLE, + USB_FEATURE_GEQ, + USB_FEATURE_AGC, + USB_FEATURE_DELAY, + USB_FEATURE_BASSBOOST, + USB_FEATURE_LOUDNESS +}; + +enum { + USB_MIXER_BOOLEAN, + USB_MIXER_INV_BOOLEAN, + USB_MIXER_S8, + USB_MIXER_U8, + USB_MIXER_S16, + USB_MIXER_U16, +}; + +enum { + USB_PROC_UPDOWN = 1, + USB_PROC_UPDOWN_SWITCH = 1, + USB_PROC_UPDOWN_MODE_SEL = 2, + + USB_PROC_PROLOGIC = 2, + USB_PROC_PROLOGIC_SWITCH = 1, + USB_PROC_PROLOGIC_MODE_SEL = 2, + + USB_PROC_3DENH = 3, + USB_PROC_3DENH_SWITCH = 1, + USB_PROC_3DENH_SPACE = 2, + + USB_PROC_REVERB = 4, + USB_PROC_REVERB_SWITCH = 1, + USB_PROC_REVERB_LEVEL = 2, + USB_PROC_REVERB_TIME = 3, + USB_PROC_REVERB_DELAY = 4, + + USB_PROC_CHORUS = 5, + USB_PROC_CHORUS_SWITCH = 1, + USB_PROC_CHORUS_LEVEL = 2, + USB_PROC_CHORUS_RATE = 3, + USB_PROC_CHORUS_DEPTH = 4, + + USB_PROC_DCR = 6, + USB_PROC_DCR_SWITCH = 1, + USB_PROC_DCR_RATIO = 2, + USB_PROC_DCR_MAX_AMP = 3, + USB_PROC_DCR_THRESHOLD = 4, + USB_PROC_DCR_ATTACK = 5, + USB_PROC_DCR_RELEASE = 6, +}; + +#define MAX_CHANNELS 10 /* max logical channels */ + + +/* + * 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 "usbmixer_maps.c" + +/* get the mapped name if the unit matches */ +static int check_mapped_name(mixer_build_t *state, int unitid, int control, char *buf, int buflen) +{ + const struct usbmix_name_map *p; + + if (! state->map) + return 0; + + for (p = state->map; p->id; p++) { + if (p->id == unitid && p->name && + (! control || ! p->control || control == p->control)) { + buflen--; + return strlcpy(buf, p->name, buflen); + } + } + return 0; +} + +/* check whether the control should be ignored */ +static int check_ignored_ctl(mixer_build_t *state, int unitid, int control) +{ + const struct usbmix_name_map *p; + + if (! state->map) + return 0; + for (p = state->map; p->id; p++) { + if (p->id == unitid && ! p->name && + (! control || ! p->control || control == p->control)) { + // printk("ignored control %d:%d\n", unitid, control); + return 1; + } + } + return 0; +} + +/* + * find an audio control unit with the given unit id + */ +static void *find_audio_control_unit(mixer_build_t *state, unsigned char unit) +{ + unsigned char *p; + + p = NULL; + while ((p = snd_usb_find_desc(state->buffer, state->buflen, p, + USB_DT_CS_INTERFACE)) != NULL) { + if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit) + return p; + } + return NULL; +} + + +/* + * copy a string with the given id + */ +static int snd_usb_copy_string_desc(mixer_build_t *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(usb_mixer_elem_info_t *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(usb_mixer_elem_info_t *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(usb_mixer_elem_info_t *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; + else + return (val - cval->min) / cval->res; +} + +static int get_abs_value(usb_mixer_elem_info_t *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(usb_mixer_elem_info_t *cval, int request, int validx, int *value_ret) +{ + unsigned char buf[2]; + int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; + int timeout = 10; + + while (timeout-- > 0) { + if (snd_usb_ctl_msg(cval->chip->dev, usb_rcvctrlpipe(cval->chip->dev, 0), + request, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + validx, cval->ctrlif | (cval->id << 8), + buf, val_len, 100) >= 0) { + *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); + return 0; + } + } + snd_printdd(KERN_ERR "cannot get ctl value: req = 0x%x, wValue = 0x%x, wIndex = 0x%x, type = %d\n", request, validx, cval->ctrlif | (cval->id << 8), cval->val_type); + return -EINVAL; +} + +static int get_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int *value) +{ + return get_ctl_value(cval, GET_CUR, validx, value); +} + +/* channel = 0: master, 1 = first channel */ +inline static int get_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int *value) +{ + return get_ctl_value(cval, GET_CUR, (cval->control << 8) | channel, value); +} + +/* + * set a mixer value + */ + +static int set_ctl_value(usb_mixer_elem_info_t *cval, int request, int validx, int value_set) +{ + unsigned char buf[2]; + int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; + int timeout = 10; + + value_set = convert_bytes_value(cval, value_set); + buf[0] = value_set & 0xff; + buf[1] = (value_set >> 8) & 0xff; + while (timeout -- > 0) + if (snd_usb_ctl_msg(cval->chip->dev, usb_sndctrlpipe(cval->chip->dev, 0), + request, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, + validx, cval->ctrlif | (cval->id << 8), + buf, val_len, 100) >= 0) + return 0; + snd_printdd(KERN_ERR "cannot set ctl value: req = 0x%x, wValue = 0x%x, wIndex = 0x%x, type = %d, data = 0x%x/0x%x\n", request, validx, cval->ctrlif | (cval->id << 8), cval->val_type, buf[0], buf[1]); + return -EINVAL; +} + +static int set_cur_ctl_value(usb_mixer_elem_info_t *cval, int validx, int value) +{ + return set_ctl_value(cval, SET_CUR, validx, value); +} + +inline static int set_cur_mix_value(usb_mixer_elem_info_t *cval, int channel, int value) +{ + return set_ctl_value(cval, SET_CUR, (cval->control << 8) | channel, value); +} + + +/* + * parser routines begin here... + */ + +static int parse_audio_unit(mixer_build_t *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. + */ + +static int add_control_to_empty(snd_card_t *card, snd_kcontrol_t *kctl) +{ + int err; + while (snd_ctl_find_id(card, &kctl->id)) + kctl->id.index++; + if ((err = snd_ctl_add(card, kctl)) < 0) { + snd_printd(KERN_ERR "cannot add control (err = %d)\n", err); + snd_ctl_free_one(kctl); + } + return err; +} + + +/* + * 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(mixer_build_t *state, usb_audio_term_t *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 SELECTOR_UNIT: + strcpy(name, "Selector"); return 8; + case PROCESSING_UNIT: + strcpy(name, "Process Unit"); return 12; + case EXTENSION_UNIT: + strcpy(name, "Ext Unit"); return 8; + case 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(mixer_build_t *state, int id, usb_audio_term_t *term) +{ + unsigned char *p1; + + memset(term, 0, sizeof(*term)); + while ((p1 = find_audio_control_unit(state, id)) != NULL) { + term->id = id; + switch (p1[2]) { + case INPUT_TERMINAL: + term->type = combine_word(p1 + 4); + term->channels = p1[7]; + term->chconfig = combine_word(p1 + 8); + term->name = p1[11]; + return 0; + case FEATURE_UNIT: + id = p1[4]; + break; /* continue to parse */ + case MIXER_UNIT: + term->type = p1[2] << 16; /* virtual type */ + term->channels = p1[5 + p1[4]]; + term->chconfig = combine_word(p1 + 6 + p1[4]); + term->name = p1[p1[0] - 1]; + return 0; + case SELECTOR_UNIT: + /* call recursively to retrieve the channel info */ + if (check_input_term(state, p1[5], term) < 0) + return -ENODEV; + term->type = p1[2] << 16; /* virtual type */ + term->id = id; + term->name = p1[9 + p1[0] - 1]; + return 0; + case PROCESSING_UNIT: + case EXTENSION_UNIT: + if (p1[6] == 1) { + id = p1[7]; + break; /* continue to parse */ + } + term->type = p1[2] << 16; /* virtual type */ + term->channels = p1[7 + p1[6]]; + term->chconfig = combine_word(p1 + 8 + p1[6]); + term->name = p1[12 + p1[6] + p1[11 + p1[6]]]; + 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 }, +}; + + +/* private_free callback */ +static void usb_mixer_elem_free(snd_kcontrol_t *kctl) +{ + if (kctl->private_data) { + kfree(kctl->private_data); + kctl->private_data = NULL; + } +} + + +/* + * interface to ALSA control for feature/mixer units + */ + +/* + * retrieve the minimum and maximum values for the specified control + */ +static int get_min_max(usb_mixer_elem_info_t *cval, int default_min) +{ + /* for failsafe */ + cval->min = default_min; + cval->max = cval->min + 1; + cval->res = 1; + + 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, GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 || + get_ctl_value(cval, GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) { + snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n", cval->id, cval->ctrlif, cval->control, cval->id); + return -EINVAL; + } + if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) { + cval->res = 1; + } else { + int last_valid_res = cval->res; + + while (cval->res > 1) { + if (set_ctl_value(cval, SET_RES, (cval->control << 8) | minchn, cval->res / 2) < 0) + break; + cval->res /= 2; + } + if (get_ctl_value(cval, GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) + cval->res = last_valid_res; + } + if (cval->res == 0) + cval->res = 1; + cval->initialized = 1; + } + return 0; +} + + +/* get a feature/mixer unit info */ +static int mixer_ctl_feature_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo) +{ + usb_mixer_elem_info_t *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(cval, 0); + uinfo->value.integer.min = 0; + uinfo->value.integer.max = (cval->max - cval->min) / cval->res; + } + return 0; +} + +/* get the current value from feature/mixer unit */ +static int mixer_ctl_feature_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + int c, cnt, val, err; + + if (cval->cmask) { + cnt = 0; + for (c = 0; c < MAX_CHANNELS; c++) { + if (cval->cmask & (1 << c)) { + err = get_cur_mix_value(cval, c + 1, &val); + if (err < 0) { + if (cval->chip->ignore_ctl_error) { + ucontrol->value.integer.value[0] = cval->min; + return 0; + } + snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", cval->control, c + 1, err); + return err; + } + val = get_relative_value(cval, val); + ucontrol->value.integer.value[cnt] = val; + cnt++; + } + } + } else { + /* master channel */ + err = get_cur_mix_value(cval, 0, &val); + if (err < 0) { + if (cval->chip->ignore_ctl_error) { + ucontrol->value.integer.value[0] = cval->min; + return 0; + } + snd_printd(KERN_ERR "cannot get current value for control %d master ch: err = %d\n", cval->control, err); + return 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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *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)) { + err = get_cur_mix_value(cval, c + 1, &oval); + if (err < 0) { + if (cval->chip->ignore_ctl_error) + return 0; + return err; + } + val = ucontrol->value.integer.value[cnt]; + val = get_abs_value(cval, val); + if (oval != val) { + set_cur_mix_value(cval, c + 1, val); + changed = 1; + } + get_cur_mix_value(cval, c + 1, &val); + cnt++; + } + } + } else { + /* master channel */ + err = get_cur_mix_value(cval, 0, &oval); + if (err < 0 && cval->chip->ignore_ctl_error) + return 0; + if (err < 0) + return err; + val = ucontrol->value.integer.value[0]; + val = get_abs_value(cval, val); + if (val != oval) { + set_cur_mix_value(cval, 0, val); + changed = 1; + } + } + return changed; +} + +static snd_kcontrol_new_t 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, +}; + + +/* + * build a feature control + */ + +static void build_feature_ctl(mixer_build_t *state, unsigned char *desc, + unsigned int ctl_mask, int control, + usb_audio_term_t *iterm, int unitid) +{ + unsigned int len = 0; + int mapped_name = 0; + int nameid = desc[desc[0] - 1]; + snd_kcontrol_t *kctl; + usb_mixer_elem_info_t *cval; + + control++; /* change from zero-based to 1-based value */ + + if (control == USB_FEATURE_GEQ) { + /* FIXME: not supported yet */ + return; + } + + if (check_ignored_ctl(state, unitid, control)) + return; + + cval = kcalloc(1, sizeof(*cval), GFP_KERNEL); + if (! cval) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + return; + } + cval->chip = state->chip; + cval->ctrlif = state->ctrlif; + 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 */ + else { + int i, c = 0; + for (i = 0; i < 16; i++) + if (ctl_mask & (1 << i)) + c++; + cval->channels = c; + } + + /* get min/max values */ + get_min_max(cval, 0); + + kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); + if (! kctl) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + kfree(cval); + return; + } + kctl->private_free = usb_mixer_elem_free; + + len = check_mapped_name(state, unitid, control, 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 USB_FEATURE_MUTE: + case USB_FEATURE_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); + } + /* 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 = strlcat(kctl->id.name, " Capture", sizeof(kctl->id.name)); + } else { + len = strlcat(kctl->id.name + len, " Playback", sizeof(kctl->id.name)); + } + } + strlcat(kctl->id.name + len, control == USB_FEATURE_MUTE ? " Switch" : " Volume", + sizeof(kctl->id.name)); + break; + + default: + if (! len) + strlcpy(kctl->id.name, audio_feature_info[control-1].name, + sizeof(kctl->id.name)); + break; + } + + /* 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 (((state->vendor == 0x471 && (state->product == 0x104 || state->product == 0x105 || state->product == 0x101)) || + (state->vendor == 0x672 && state->product == 0x1041)) && !strcmp(kctl->id.name, "PCM Playback Volume") && + cval->min == -15616) { + snd_printk("USB Audio: using volume control quirk for the UDA1321/N101 chip\n"); + cval->max = -256; + } + + snd_printdd(KERN_INFO "[%d] FU [%s] ch = %d, val = %d/%d/%d\n", + cval->id, kctl->id.name, cval->channels, cval->min, cval->max, cval->res); + add_control_to_empty(state->chip->card, kctl); +} + + + +/* + * parse a feature unit + * + * most of controlls are defined here. + */ +static int parse_audio_feature_unit(mixer_build_t *state, int unitid, unsigned char *ftr) +{ + int channels, i, j; + usb_audio_term_t iterm; + unsigned int master_bits, first_ch_bits; + int err, csize; + + if (ftr[0] < 7 || ! (csize = ftr[5]) || ftr[0] < 7 + csize) { + snd_printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid); + return -EINVAL; + } + + /* parse the source unit */ + if ((err = parse_audio_unit(state, ftr[4])) < 0) + return err; + + /* determine the input source type and name */ + if (check_input_term(state, ftr[4], &iterm) < 0) + return -EINVAL; + + channels = (ftr[0] - 7) / csize - 1; + + master_bits = snd_usb_combine_bytes(ftr + 6, csize); + if (channels > 0) + first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize); + else + first_ch_bits = 0; + /* check all control types */ + for (i = 0; i < 10; i++) { + unsigned int ch_bits = 0; + for (j = 0; j < channels; j++) { + unsigned int mask = snd_usb_combine_bytes(ftr + 6 + csize * (j+1), csize); + if (mask & (1 << i)) + ch_bits |= (1 << j); + } + if (ch_bits & 1) /* the first channel must be set (for ease of programming) */ + build_feature_ctl(state, ftr, ch_bits, i, &iterm, unitid); + if (master_bits & (1 << i)) + build_feature_ctl(state, ftr, 0, i, &iterm, unitid); + } + + 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(mixer_build_t *state, unsigned char *desc, + int in_pin, int in_ch, int unitid, + usb_audio_term_t *iterm) +{ + usb_mixer_elem_info_t *cval; + unsigned int input_pins = desc[4]; + unsigned int num_outs = desc[5 + input_pins]; + unsigned int i, len; + snd_kcontrol_t *kctl; + + if (check_ignored_ctl(state, unitid, 0)) + return; + + cval = kcalloc(1, sizeof(*cval), GFP_KERNEL); + if (! cval) + return; + + cval->chip = state->chip; + cval->ctrlif = state->ctrlif; + cval->id = unitid; + cval->control = in_ch + 1; /* based on 1 */ + cval->val_type = USB_MIXER_S16; + for (i = 0; i < num_outs; i++) { + if (check_matrix_bitmap(desc + 9 + input_pins, 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) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + kfree(cval); + return; + } + kctl->private_free = usb_mixer_elem_free; + + len = check_mapped_name(state, unitid, 0, 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); + strlcat(kctl->id.name + len, " Volume", sizeof(kctl->id.name)); + + snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n", + cval->id, kctl->id.name, cval->channels, cval->min, cval->max); + add_control_to_empty(state->chip->card, kctl); +} + + +/* + * parse a mixer unit + */ +static int parse_audio_mixer_unit(mixer_build_t *state, int unitid, unsigned char *desc) +{ + usb_audio_term_t iterm; + int input_pins, num_ins, num_outs; + int pin, ich, err; + + if (desc[0] < 11 || ! (input_pins = desc[4]) || ! (num_outs = desc[5 + input_pins])) { + snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid); + return -EINVAL; + } + /* no bmControls field (e.g. Maya44) -> ignore */ + if (desc[0] <= 10 + input_pins) { + snd_printdd(KERN_INFO "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[5 + pin]); + if (err < 0) + return err; + err = check_input_term(state, desc[5 + 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) { + if (check_matrix_bitmap(desc + 9 + input_pins, + 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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + int err, val; + + err = get_cur_ctl_value(cval, cval->control << 8, &val); + if (err < 0 && cval->chip->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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + int val, oval, err; + + err = get_cur_ctl_value(cval, cval->control << 8, &oval); + if (err < 0) { + if (cval->chip->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 snd_kcontrol_new_t 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[] = { + { USB_PROC_UPDOWN_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_UPDOWN_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 }, + { 0 } +}; +static struct procunit_value_info prologic_proc_info[] = { + { USB_PROC_PROLOGIC_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_PROLOGIC_MODE_SEL, "Mode Select", USB_MIXER_U8, 1 }, + { 0 } +}; +static struct procunit_value_info threed_enh_proc_info[] = { + { USB_PROC_3DENH_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_3DENH_SPACE, "Spaciousness", USB_MIXER_U8 }, + { 0 } +}; +static struct procunit_value_info reverb_proc_info[] = { + { USB_PROC_REVERB_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, + { USB_PROC_REVERB_TIME, "Time", USB_MIXER_U16 }, + { USB_PROC_REVERB_DELAY, "Delay", USB_MIXER_U8 }, + { 0 } +}; +static struct procunit_value_info chorus_proc_info[] = { + { USB_PROC_CHORUS_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, + { USB_PROC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, + { USB_PROC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, + { 0 } +}; +static struct procunit_value_info dcr_proc_info[] = { + { USB_PROC_DCR_SWITCH, "Switch", USB_MIXER_BOOLEAN }, + { USB_PROC_DCR_RATIO, "Ratio", USB_MIXER_U16 }, + { USB_PROC_DCR_MAX_AMP, "Max Amp", USB_MIXER_S16 }, + { USB_PROC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, + { USB_PROC_DCR_ATTACK, "Attack Time", USB_MIXER_U16 }, + { USB_PROC_DCR_RELEASE, "Release Time", USB_MIXER_U16 }, + { 0 } +}; + +static struct procunit_info procunits[] = { + { USB_PROC_UPDOWN, "Up Down", updown_proc_info }, + { USB_PROC_PROLOGIC, "Dolby Prologic", prologic_proc_info }, + { USB_PROC_3DENH, "3D Stereo Extender", threed_enh_proc_info }, + { USB_PROC_REVERB, "Reverb", reverb_proc_info }, + { USB_PROC_CHORUS, "Chorus", chorus_proc_info }, + { USB_PROC_DCR, "DCR", dcr_proc_info }, + { 0 }, +}; + +/* + * build a processing/extension unit + */ +static int build_audio_procunit(mixer_build_t *state, int unitid, unsigned char *dsc, struct procunit_info *list, char *name) +{ + int num_ins = dsc[6]; + usb_mixer_elem_info_t *cval; + snd_kcontrol_t *kctl; + int i, err, nameid, type, len; + struct procunit_info *info; + struct procunit_value_info *valinfo; + 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 (dsc[0] < 13 || dsc[0] < 13 + num_ins || dsc[0] < num_ins + dsc[11 + num_ins]) { + snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid); + return -EINVAL; + } + + for (i = 0; i < num_ins; i++) { + if ((err = parse_audio_unit(state, dsc[7 + i])) < 0) + return err; + } + + type = combine_word(&dsc[4]); + if (! type) + return 0; /* undefined? */ + + 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++) { + /* FIXME: bitmap might be longer than 8bit */ + if (! (dsc[12 + num_ins] & (1 << (valinfo->control - 1)))) + continue; + if (check_ignored_ctl(state, unitid, valinfo->control)) + continue; + cval = kcalloc(1, sizeof(*cval), GFP_KERNEL); + if (! cval) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + return -ENOMEM; + } + cval->chip = state->chip; + cval->ctrlif = state->ctrlif; + cval->id = unitid; + cval->control = valinfo->control; + cval->val_type = valinfo->val_type; + cval->channels = 1; + + /* get min/max values */ + if (type == USB_PROC_UPDOWN && cval->control == USB_PROC_UPDOWN_MODE_SEL) { + /* FIXME: hard-coded */ + cval->min = 1; + cval->max = dsc[15]; + cval->res = 1; + cval->initialized = 1; + } else + get_min_max(cval, valinfo->min_value); + + kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); + if (! kctl) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + kfree(cval); + return -ENOMEM; + } + kctl->private_free = usb_mixer_elem_free; + + if (check_mapped_name(state, unitid, cval->control, kctl->id.name, sizeof(kctl->id.name))) + ; + else if (info->name) + strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); + else { + nameid = dsc[12 + num_ins + dsc[11 + num_ins]]; + 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)); + } + strlcat(kctl->id.name, " ", sizeof(kctl->id.name)); + strlcat(kctl->id.name, valinfo->suffix, sizeof(kctl->id.name)); + + snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n", + cval->id, kctl->id.name, cval->channels, cval->min, cval->max); + if ((err = add_control_to_empty(state->chip->card, kctl)) < 0) + return err; + } + return 0; +} + + +static int parse_audio_processing_unit(mixer_build_t *state, int unitid, unsigned char *desc) +{ + return build_audio_procunit(state, unitid, desc, procunits, "Processing Unit"); +} + +static int parse_audio_extension_unit(mixer_build_t *state, int unitid, unsigned char *desc) +{ + return build_audio_procunit(state, unitid, desc, NULL, "Extension Unit"); +} + + +/* + * Selector Unit + */ + +/* info callback for selector unit + * use an enumerator type for routing + */ +static int mixer_ctl_selector_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + char **itemlist = (char **)kcontrol->private_value; + + snd_assert(itemlist, return -EINVAL); + uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; + uinfo->count = 1; + uinfo->value.enumerated.items = cval->max; + if ((int)uinfo->value.enumerated.item >= cval->max) + uinfo->value.enumerated.item = cval->max - 1; + strcpy(uinfo->value.enumerated.name, itemlist[uinfo->value.enumerated.item]); + return 0; +} + +/* get callback for selector unit */ +static int mixer_ctl_selector_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + int val, err; + + err = get_cur_ctl_value(cval, 0, &val); + if (err < 0) { + if (cval->chip->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(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol) +{ + usb_mixer_elem_info_t *cval = kcontrol->private_data; + int val, oval, err; + + err = get_cur_ctl_value(cval, 0, &oval); + if (err < 0) { + if (cval->chip->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, 0, val); + return 1; + } + return 0; +} + +/* alsa control interface for selector unit */ +static snd_kcontrol_new_t 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(snd_kcontrol_t *kctl) +{ + int i, num_ins = 0; + + if (kctl->private_data) { + usb_mixer_elem_info_t *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(mixer_build_t *state, int unitid, unsigned char *desc) +{ + unsigned int num_ins = desc[4]; + unsigned int i, nameid, len; + int err; + usb_mixer_elem_info_t *cval; + snd_kcontrol_t *kctl; + char **namelist; + + if (! num_ins || desc[0] < 6 + num_ins) { + snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid); + return -EINVAL; + } + + for (i = 0; i < num_ins; i++) { + if ((err = parse_audio_unit(state, desc[5 + i])) < 0) + return err; + } + + if (num_ins == 1) /* only one ? nonsense! */ + return 0; + + if (check_ignored_ctl(state, unitid, 0)) + return 0; + + cval = kcalloc(1, sizeof(*cval), GFP_KERNEL); + if (! cval) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + return -ENOMEM; + } + cval->chip = state->chip; + cval->ctrlif = state->ctrlif; + cval->id = unitid; + cval->val_type = USB_MIXER_U8; + cval->channels = 1; + cval->min = 1; + cval->max = num_ins; + cval->res = 1; + cval->initialized = 1; + + namelist = kmalloc(sizeof(char *) * num_ins, GFP_KERNEL); + if (! namelist) { + snd_printk(KERN_ERR "cannot malloc\n"); + kfree(cval); + return -ENOMEM; + } +#define MAX_ITEM_NAME_LEN 64 + for (i = 0; i < num_ins; i++) { + usb_audio_term_t iterm; + len = 0; + namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); + if (! namelist[i]) { + snd_printk(KERN_ERR "cannot malloc\n"); + while (--i > 0) + kfree(namelist[i]); + kfree(namelist); + kfree(cval); + return -ENOMEM; + } + if (check_input_term(state, desc[5 + i], &iterm) >= 0) + len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0); + if (! len) + sprintf(namelist[i], "Input %d", i); + } + + kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); + if (! kctl) { + snd_printk(KERN_ERR "cannot malloc kcontrol\n"); + kfree(cval); + return -ENOMEM; + } + kctl->private_value = (unsigned long)namelist; + kctl->private_free = usb_mixer_selector_elem_free; + + nameid = desc[desc[0] - 1]; + len = check_mapped_name(state, unitid, 0, 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 ((state->oterm.type & 0xff00) == 0x0100) + strlcat(kctl->id.name, " Capture Source", sizeof(kctl->id.name)); + else + strlcat(kctl->id.name, " Playback Source", sizeof(kctl->id.name)); + } + + snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n", + cval->id, kctl->id.name, num_ins); + if ((err = add_control_to_empty(state->chip->card, kctl)) < 0) + return err; + + return 0; +} + + +/* + * parse an audio unit recursively + */ + +static int parse_audio_unit(mixer_build_t *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) { + snd_printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid); + return -EINVAL; + } + + switch (p1[2]) { + case INPUT_TERMINAL: + return 0; /* NOP */ + case MIXER_UNIT: + return parse_audio_mixer_unit(state, unitid, p1); + case SELECTOR_UNIT: + return parse_audio_selector_unit(state, unitid, p1); + case FEATURE_UNIT: + return parse_audio_feature_unit(state, unitid, p1); + case PROCESSING_UNIT: + return parse_audio_processing_unit(state, unitid, p1); + case EXTENSION_UNIT: + return parse_audio_extension_unit(state, unitid, p1); + default: + snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]); + return -EINVAL; + } +} + +/* + * create mixer controls + * + * walk through all OUTPUT_TERMINAL descriptors to search for mixers + */ +int snd_usb_create_mixer(snd_usb_audio_t *chip, int ctrlif) +{ + unsigned char *desc; + mixer_build_t state; + int err; + const struct usbmix_ctl_map *map; + struct usb_device_descriptor *dev = &chip->dev->descriptor; + struct usb_host_interface *hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0]; + + strcpy(chip->card->mixername, "USB Mixer"); + + memset(&state, 0, sizeof(state)); + state.chip = chip; + state.buffer = hostif->extra; + state.buflen = hostif->extralen; + state.ctrlif = ctrlif; + state.vendor = le16_to_cpu(dev->idVendor); + state.product = le16_to_cpu(dev->idProduct); + + /* check the mapping table */ + for (map = usbmix_ctl_maps; map->vendor; map++) { + if (map->vendor == state.vendor && map->product == state.product) { + state.map = map->map; + chip->ignore_ctl_error = map->ignore_ctl_error; + break; + } + } +#ifdef IGNORE_CTL_ERROR + chip->ignore_ctl_error = 1; +#endif + + desc = NULL; + while ((desc = snd_usb_find_csint_desc(hostif->extra, hostif->extralen, desc, OUTPUT_TERMINAL)) != NULL) { + if (desc[0] < 9) + continue; /* invalid descriptor? */ + set_bit(desc[3], state.unitbitmap); /* mark terminal ID as visited */ + state.oterm.id = desc[3]; + state.oterm.type = combine_word(&desc[4]); + state.oterm.name = desc[8]; + err = parse_audio_unit(&state, desc[7]); + if (err < 0) + return err; + } + return 0; +} |
