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usbmixer.c
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usbmixer.c
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/*
* (Tentative) USB Audio Driver for ALSA
*
* Mixer control part
*
* Copyright (c) 2002 by Takashi Iwai <[email protected]>
*
* Many codes borrowed from audio.c by
* Alan Cox ([email protected])
* Thomas Sailer ([email protected])
*
*
* 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 <sound/hwdep.h>
#include <sound/info.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_mixer_interface {
snd_usb_audio_t *chip;
unsigned int ctrlif;
struct list_head list;
unsigned int ignore_ctl_error;
struct urb *urb;
usb_mixer_elem_info_t **id_elems; /* array[256], indexed by unit id */
/* Sound Blaster remote control stuff */
enum {
RC_NONE,
RC_EXTIGY,
RC_AUDIGY2NX,
} rc_type;
unsigned long rc_hwdep_open;
u32 rc_code;
wait_queue_head_t rc_waitq;
struct urb *rc_urb;
struct usb_ctrlrequest *rc_setup_packet;
u8 rc_buffer[6];
u8 audigy2nx_leds[3];
};
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;
struct usb_mixer_interface *mixer;
unsigned char *buffer;
unsigned int buflen;
DECLARE_BITMAP(unitbitmap, 256);
usb_audio_term_t oterm;
const struct usbmix_name_map *map;
const struct usbmix_selector_map *selector_map;
};
struct usb_mixer_elem_info {
struct usb_mixer_interface *mixer;
usb_mixer_elem_info_t *next_id_elem; /* list of controls with same id */
snd_ctl_elem_id_t *elem_id;
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;
u8 initialized;
};
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;
}
/* get the mapped selector source name */
static int check_mapped_selector_name(mixer_build_t *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(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->mixer->chip->dev,
usb_rcvctrlpipe(cval->mixer->chip->dev, 0),
request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
validx, cval->mixer->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 = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
request, validx, cval->mixer->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 */
static inline 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->mixer->chip->dev,
usb_sndctrlpipe(cval->mixer->chip->dev, 0),
request,
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
validx, cval->mixer->ctrlif | (cval->id << 8),
buf, val_len, 100) >= 0)
return 0;
snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
request, validx, cval->mixer->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);
}
static inline 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(mixer_build_t *state, snd_kcontrol_t *kctl)
{
usb_mixer_elem_info_t *cval = kctl->private_data;
int err;
while (snd_ctl_find_id(state->chip->card, &kctl->id))
kctl->id.index++;
if ((err = snd_ctl_add(state->chip->card, kctl)) < 0) {
snd_printd(KERN_ERR "cannot add control (err = %d)\n", err);
snd_ctl_free_one(kctl);
return err;
}
cval->elem_id = &kctl->id;
cval->next_id_elem = state->mixer->id_elems[cval->id];
state->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(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)
{
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->mixer->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->mixer->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->mixer->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->mixer->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->mixer->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 = kzalloc(sizeof(*cval), GFP_KERNEL);
if (! cval) {
snd_printk(KERN_ERR "cannot malloc kcontrol\n");
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 */
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 */
switch (state->chip->usb_id) {
case USB_ID(0x0471, 0x0101):
case USB_ID(0x0471, 0x0104):
case USB_ID(0x0471, 0x0105):
case USB_ID(0x0672, 0x1041):
if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
cval->min == -15616) {
snd_printk(KERN_INFO "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, 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 = kzalloc(sizeof(*cval), GFP_KERNEL);