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Diffstat (limited to 'sound/usb/usbmixer.c')
-rw-r--r--sound/usb/usbmixer.c1545
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;
+}
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-25 15:59:19 +0000