--- /dev/null
+/*
+ * (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
+ *
+ */
+
+/*
+ * TODOs, for both the mixer and the streaming interfaces:
+ *
+ * - support for UAC2 effect units
+ * - support for graphical equalizers
+ * - RANGE and MEM set commands (UAC2)
+ * - RANGE and MEM interrupt dispatchers (UAC2)
+ * - audio channel clustering (UAC2)
+ * - audio sample rate converter units (UAC2)
+ * - proper handling of clock multipliers (UAC2)
+ * - dispatch clock change notifications (UAC2)
+ * - stop PCM streams which use a clock that became invalid
+ * - stop PCM streams which use a clock selector that has changed
+ * - parse available sample rates again when clock sources changed
+ */
+
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/usb.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/audio-v2.h>
+
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/hwdep.h>
+#include <sound/info.h>
+#include <sound/tlv.h>
+
+#include "usbaudio.h"
+#include "mixer.h"
+#include "helper.h"
+#include "mixer_quirks.h"
+#include "power.h"
+
+#define MAX_ID_ELEMS 256
+
+struct usb_audio_term {
+ int id;
+ int type;
+ int channels;
+ unsigned int chconfig;
+ int name;
+};
+
+struct usbmix_name_map;
+
+struct mixer_build {
+ struct snd_usb_audio *chip;
+ struct usb_mixer_interface *mixer;
+ unsigned char *buffer;
+ unsigned int buflen;
+ DECLARE_BITMAP(unitbitmap, MAX_ID_ELEMS);
+ struct usb_audio_term oterm;
+ const struct usbmix_name_map *map;
+ const struct usbmix_selector_map *selector_map;
+};
+
+/*E-mu 0202/0404/0204 eXtension Unit(XU) control*/
+enum {
+ USB_XU_CLOCK_RATE = 0xe301,
+ USB_XU_CLOCK_SOURCE = 0xe302,
+ USB_XU_DIGITAL_IO_STATUS = 0xe303,
+ USB_XU_DEVICE_OPTIONS = 0xe304,
+ USB_XU_DIRECT_MONITORING = 0xe305,
+ USB_XU_METERING = 0xe306
+};
+enum {
+ USB_XU_CLOCK_SOURCE_SELECTOR = 0x02, /* clock source*/
+ USB_XU_CLOCK_RATE_SELECTOR = 0x03, /* clock rate */
+ USB_XU_DIGITAL_FORMAT_SELECTOR = 0x01, /* the spdif format */
+ USB_XU_SOFT_LIMIT_SELECTOR = 0x03 /* soft limiter */
+};
+
+/*
+ * manual mapping of mixer names
+ * if the mixer topology is too complicated and the parsed names are
+ * ambiguous, add the entries in usbmixer_maps.c.
+ */
+#include "mixer_maps.c"
+
+static const struct usbmix_name_map *
+find_map(struct mixer_build *state, int unitid, int control)
+{
+ const struct usbmix_name_map *p = state->map;
+
+ if (!p)
+ return NULL;
+
+ for (p = state->map; p->id; p++) {
+ if (p->id == unitid &&
+ (!control || !p->control || control == p->control))
+ return p;
+ }
+ return NULL;
+}
+
+/* get the mapped name if the unit matches */
+static int
+check_mapped_name(const struct usbmix_name_map *p, char *buf, int buflen)
+{
+ if (!p || !p->name)
+ return 0;
+
+ buflen--;
+ return strlcpy(buf, p->name, buflen);
+}
+
+/* ignore the error value if ignore_ctl_error flag is set */
+#define filter_error(cval, err) \
+ ((cval)->head.mixer->ignore_ctl_error ? 0 : (err))
+
+/* check whether the control should be ignored */
+static inline int
+check_ignored_ctl(const struct usbmix_name_map *p)
+{
+ if (!p || p->name || p->dB)
+ return 0;
+ return 1;
+}
+
+/* dB mapping */
+static inline void check_mapped_dB(const struct usbmix_name_map *p,
+ struct usb_mixer_elem_info *cval)
+{
+ if (p && p->dB) {
+ cval->dBmin = p->dB->min;
+ cval->dBmax = p->dB->max;
+ cval->initialized = 1;
+ }
+}
+
+/* get the mapped selector source name */
+static int check_mapped_selector_name(struct mixer_build *state, int unitid,
+ int index, char *buf, int buflen)
+{
+ const struct usbmix_selector_map *p;
+
+ if (!state->selector_map)
+ return 0;
+ for (p = state->selector_map; p->id; p++) {
+ if (p->id == unitid && index < p->count)
+ return strlcpy(buf, p->names[index], buflen);
+ }
+ return 0;
+}
+
+/*
+ * find an audio control unit with the given unit id
+ */
+static void *find_audio_control_unit(struct mixer_build *state,
+ unsigned char unit)
+{
+ /* we just parse the header */
+ struct uac_feature_unit_descriptor *hdr = NULL;
+
+ while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr,
+ USB_DT_CS_INTERFACE)) != NULL) {
+ if (hdr->bLength >= 4 &&
+ hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL &&
+ hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER &&
+ hdr->bUnitID == unit)
+ return hdr;
+ }
+
+ return NULL;
+}
+
+/*
+ * copy a string with the given id
+ */
+static int snd_usb_copy_string_desc(struct mixer_build *state,
+ int index, char *buf, int maxlen)
+{
+ int len = usb_string(state->chip->dev, index, buf, maxlen - 1);
+ buf[len] = 0;
+ return len;
+}
+
+/*
+ * convert from the byte/word on usb descriptor to the zero-based integer
+ */
+static int convert_signed_value(struct usb_mixer_elem_info *cval, int val)
+{
+ switch (cval->val_type) {
+ case USB_MIXER_BOOLEAN:
+ return !!val;
+ case USB_MIXER_INV_BOOLEAN:
+ return !val;
+ case USB_MIXER_U8:
+ val &= 0xff;
+ break;
+ case USB_MIXER_S8:
+ val &= 0xff;
+ if (val >= 0x80)
+ val -= 0x100;
+ break;
+ case USB_MIXER_U16:
+ val &= 0xffff;
+ break;
+ case USB_MIXER_S16:
+ val &= 0xffff;
+ if (val >= 0x8000)
+ val -= 0x10000;
+ break;
+ }
+ return val;
+}
+
+/*
+ * convert from the zero-based int to the byte/word for usb descriptor
+ */
+static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val)
+{
+ switch (cval->val_type) {
+ case USB_MIXER_BOOLEAN:
+ return !!val;
+ case USB_MIXER_INV_BOOLEAN:
+ return !val;
+ case USB_MIXER_S8:
+ case USB_MIXER_U8:
+ return val & 0xff;
+ case USB_MIXER_S16:
+ case USB_MIXER_U16:
+ return val & 0xffff;
+ }
+ return 0; /* not reached */
+}
+
+static int get_relative_value(struct usb_mixer_elem_info *cval, int val)
+{
+ if (!cval->res)
+ cval->res = 1;
+ if (val < cval->min)
+ return 0;
+ else if (val >= cval->max)
+ return (cval->max - cval->min + cval->res - 1) / cval->res;
+ else
+ return (val - cval->min) / cval->res;
+}
+
+static int get_abs_value(struct usb_mixer_elem_info *cval, int val)
+{
+ if (val < 0)
+ return cval->min;
+ if (!cval->res)
+ cval->res = 1;
+ val *= cval->res;
+ val += cval->min;
+ if (val > cval->max)
+ return cval->max;
+ return val;
+}
+
+
+/*
+ * retrieve a mixer value
+ */
+
+static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request,
+ int validx, int *value_ret)
+{
+ struct snd_usb_audio *chip = cval->head.mixer->chip;
+ unsigned char buf[2];
+ int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
+ int timeout = 10;
+ int idx = 0, err;
+
+ err = snd_usb_autoresume(chip);
+ if (err < 0)
+ return -EIO;
+
+ down_read(&chip->shutdown_rwsem);
+ while (timeout-- > 0) {
+ if (chip->shutdown)
+ break;
+ idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
+ if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ validx, idx, buf, val_len) >= val_len) {
+ *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len));
+ err = 0;
+ goto out;
+ }
+ }
+ usb_audio_dbg(chip,
+ "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
+ request, validx, idx, cval->val_type);
+ err = -EINVAL;
+
+ out:
+ up_read(&chip->shutdown_rwsem);
+ snd_usb_autosuspend(chip);
+ return err;
+}
+
+static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request,
+ int validx, int *value_ret)
+{
+ struct snd_usb_audio *chip = cval->head.mixer->chip;
+ unsigned char buf[2 + 3 * sizeof(__u16)]; /* enough space for one range */
+ unsigned char *val;
+ int idx = 0, ret, size;
+ __u8 bRequest;
+
+ if (request == UAC_GET_CUR) {
+ bRequest = UAC2_CS_CUR;
+ size = sizeof(__u16);
+ } else {
+ bRequest = UAC2_CS_RANGE;
+ size = sizeof(buf);
+ }
+
+ memset(buf, 0, sizeof(buf));
+
+ ret = snd_usb_autoresume(chip) ? -EIO : 0;
+ if (ret)
+ goto error;
+
+ down_read(&chip->shutdown_rwsem);
+ if (chip->shutdown) {
+ ret = -ENODEV;
+ } else {
+ idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
+ ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
+ validx, idx, buf, size);
+ }
+ up_read(&chip->shutdown_rwsem);
+ snd_usb_autosuspend(chip);
+
+ if (ret < 0) {
+error:
+ usb_audio_err(chip,
+ "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n",
+ request, validx, idx, cval->val_type);
+ return ret;
+ }
+
+ /* FIXME: how should we handle multiple triplets here? */
+
+ switch (request) {
+ case UAC_GET_CUR:
+ val = buf;
+ break;
+ case UAC_GET_MIN:
+ val = buf + sizeof(__u16);
+ break;
+ case UAC_GET_MAX:
+ val = buf + sizeof(__u16) * 2;
+ break;
+ case UAC_GET_RES:
+ val = buf + sizeof(__u16) * 3;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(val, sizeof(__u16)));
+
+ return 0;
+}
+
+static int get_ctl_value(struct usb_mixer_elem_info *cval, int request,
+ int validx, int *value_ret)
+{
+ validx += cval->idx_off;
+
+ return (cval->head.mixer->protocol == UAC_VERSION_1) ?
+ get_ctl_value_v1(cval, request, validx, value_ret) :
+ get_ctl_value_v2(cval, request, validx, value_ret);
+}
+
+static int get_cur_ctl_value(struct usb_mixer_elem_info *cval,
+ int validx, int *value)
+{
+ return get_ctl_value(cval, UAC_GET_CUR, validx, value);
+}
+
+/* channel = 0: master, 1 = first channel */
+static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval,
+ int channel, int *value)
+{
+ return get_ctl_value(cval, UAC_GET_CUR,
+ (cval->control << 8) | channel,
+ value);
+}
+
+int snd_usb_get_cur_mix_value(struct usb_mixer_elem_info *cval,
+ int channel, int index, int *value)
+{
+ int err;
+
+ if (cval->cached & (1 << channel)) {
+ *value = cval->cache_val[index];
+ return 0;
+ }
+ err = get_cur_mix_raw(cval, channel, value);
+ if (err < 0) {
+ if (!cval->head.mixer->ignore_ctl_error)
+ usb_audio_dbg(cval->head.mixer->chip,
+ "cannot get current value for control %d ch %d: err = %d\n",
+ cval->control, channel, err);
+ return err;
+ }
+ cval->cached |= 1 << channel;
+ cval->cache_val[index] = *value;
+ return 0;
+}
+
+/*
+ * set a mixer value
+ */
+
+int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval,
+ int request, int validx, int value_set)
+{
+ struct snd_usb_audio *chip = cval->head.mixer->chip;
+ unsigned char buf[2];
+ int idx = 0, val_len, err, timeout = 10;
+
+ validx += cval->idx_off;
+
+ if (cval->head.mixer->protocol == UAC_VERSION_1) {
+ val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1;
+ } else { /* UAC_VERSION_2 */
+ /* audio class v2 controls are always 2 bytes in size */
+ val_len = sizeof(__u16);
+
+ /* FIXME */
+ if (request != UAC_SET_CUR) {
+ usb_audio_dbg(chip, "RANGE setting not yet supported\n");
+ return -EINVAL;
+ }
+
+ request = UAC2_CS_CUR;
+ }
+
+ value_set = convert_bytes_value(cval, value_set);
+ buf[0] = value_set & 0xff;
+ buf[1] = (value_set >> 8) & 0xff;
+ err = snd_usb_autoresume(chip);
+ if (err < 0)
+ return -EIO;
+ down_read(&chip->shutdown_rwsem);
+ while (timeout-- > 0) {
+ if (chip->shutdown)
+ break;
+ idx = snd_usb_ctrl_intf(chip) | (cval->head.id << 8);
+ if (snd_usb_ctl_msg(chip->dev,
+ usb_sndctrlpipe(chip->dev, 0), request,
+ USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
+ validx, idx, buf, val_len) >= 0) {
+ err = 0;
+ goto out;
+ }
+ }
+ usb_audio_dbg(chip, "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n",
+ request, validx, idx, cval->val_type, buf[0], buf[1]);
+ err = -EINVAL;
+
+ out:
+ up_read(&chip->shutdown_rwsem);
+ snd_usb_autosuspend(chip);
+ return err;
+}
+
+static int set_cur_ctl_value(struct usb_mixer_elem_info *cval,
+ int validx, int value)
+{
+ return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value);
+}
+
+int snd_usb_set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel,
+ int index, int value)
+{
+ int err;
+ unsigned int read_only = (channel == 0) ?
+ cval->master_readonly :
+ cval->ch_readonly & (1 << (channel - 1));
+
+ if (read_only) {
+ usb_audio_dbg(cval->head.mixer->chip,
+ "%s(): channel %d of control %d is read_only\n",
+ __func__, channel, cval->control);
+ return 0;
+ }
+
+ err = snd_usb_mixer_set_ctl_value(cval,
+ UAC_SET_CUR, (cval->control << 8) | channel,
+ value);
+ if (err < 0)
+ return err;
+ cval->cached |= 1 << channel;
+ cval->cache_val[index] = value;
+ return 0;
+}
+
+/*
+ * TLV callback for mixer volume controls
+ */
+int snd_usb_mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+ unsigned int size, unsigned int __user *_tlv)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ DECLARE_TLV_DB_MINMAX(scale, 0, 0);
+
+ if (size < sizeof(scale))
+ return -ENOMEM;
+ scale[2] = cval->dBmin;
+ scale[3] = cval->dBmax;
+ if (copy_to_user(_tlv, scale, sizeof(scale)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * parser routines begin here...
+ */
+
+static int parse_audio_unit(struct mixer_build *state, int unitid);
+
+
+/*
+ * check if the input/output channel routing is enabled on the given bitmap.
+ * used for mixer unit parser
+ */
+static int check_matrix_bitmap(unsigned char *bmap,
+ int ich, int och, int num_outs)
+{
+ int idx = ich * num_outs + och;
+ return bmap[idx >> 3] & (0x80 >> (idx & 7));
+}
+
+/*
+ * add an alsa control element
+ * search and increment the index until an empty slot is found.
+ *
+ * if failed, give up and free the control instance.
+ */
+
+int snd_usb_mixer_add_control(struct usb_mixer_elem_list *list,
+ struct snd_kcontrol *kctl)
+{
+ struct usb_mixer_interface *mixer = list->mixer;
+ int err;
+
+ while (snd_ctl_find_id(mixer->chip->card, &kctl->id))
+ kctl->id.index++;
+ if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) {
+ usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n",
+ err);
+ return err;
+ }
+ list->kctl = kctl;
+ list->next_id_elem = mixer->id_elems[list->id];
+ mixer->id_elems[list->id] = list;
+ return 0;
+}
+
+/*
+ * get a terminal name string
+ */
+
+static struct iterm_name_combo {
+ int type;
+ char *name;
+} iterm_names[] = {
+ { 0x0300, "Output" },
+ { 0x0301, "Speaker" },
+ { 0x0302, "Headphone" },
+ { 0x0303, "HMD Audio" },
+ { 0x0304, "Desktop Speaker" },
+ { 0x0305, "Room Speaker" },
+ { 0x0306, "Com Speaker" },
+ { 0x0307, "LFE" },
+ { 0x0600, "External In" },
+ { 0x0601, "Analog In" },
+ { 0x0602, "Digital In" },
+ { 0x0603, "Line" },
+ { 0x0604, "Legacy In" },
+ { 0x0605, "IEC958 In" },
+ { 0x0606, "1394 DA Stream" },
+ { 0x0607, "1394 DV Stream" },
+ { 0x0700, "Embedded" },
+ { 0x0701, "Noise Source" },
+ { 0x0702, "Equalization Noise" },
+ { 0x0703, "CD" },
+ { 0x0704, "DAT" },
+ { 0x0705, "DCC" },
+ { 0x0706, "MiniDisk" },
+ { 0x0707, "Analog Tape" },
+ { 0x0708, "Phonograph" },
+ { 0x0709, "VCR Audio" },
+ { 0x070a, "Video Disk Audio" },
+ { 0x070b, "DVD Audio" },
+ { 0x070c, "TV Tuner Audio" },
+ { 0x070d, "Satellite Rec Audio" },
+ { 0x070e, "Cable Tuner Audio" },
+ { 0x070f, "DSS Audio" },
+ { 0x0710, "Radio Receiver" },
+ { 0x0711, "Radio Transmitter" },
+ { 0x0712, "Multi-Track Recorder" },
+ { 0x0713, "Synthesizer" },
+ { 0 },
+};
+
+static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm,
+ unsigned char *name, int maxlen, int term_only)
+{
+ struct iterm_name_combo *names;
+
+ if (iterm->name)
+ return snd_usb_copy_string_desc(state, iterm->name,
+ name, maxlen);
+
+ /* virtual type - not a real terminal */
+ if (iterm->type >> 16) {
+ if (term_only)
+ return 0;
+ switch (iterm->type >> 16) {
+ case UAC_SELECTOR_UNIT:
+ strcpy(name, "Selector");
+ return 8;
+ case UAC1_PROCESSING_UNIT:
+ strcpy(name, "Process Unit");
+ return 12;
+ case UAC1_EXTENSION_UNIT:
+ strcpy(name, "Ext Unit");
+ return 8;
+ case UAC_MIXER_UNIT:
+ strcpy(name, "Mixer");
+ return 5;
+ default:
+ return sprintf(name, "Unit %d", iterm->id);
+ }
+ }
+
+ switch (iterm->type & 0xff00) {
+ case 0x0100:
+ strcpy(name, "PCM");
+ return 3;
+ case 0x0200:
+ strcpy(name, "Mic");
+ return 3;
+ case 0x0400:
+ strcpy(name, "Headset");
+ return 7;
+ case 0x0500:
+ strcpy(name, "Phone");
+ return 5;
+ }
+
+ for (names = iterm_names; names->type; names++) {
+ if (names->type == iterm->type) {
+ strcpy(name, names->name);
+ return strlen(names->name);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * parse the source unit recursively until it reaches to a terminal
+ * or a branched unit.
+ */
+static int check_input_term(struct mixer_build *state, int id,
+ struct usb_audio_term *term)
+{
+ int err;
+ void *p1;
+
+ memset(term, 0, sizeof(*term));
+ while ((p1 = find_audio_control_unit(state, id)) != NULL) {
+ unsigned char *hdr = p1;
+ term->id = id;
+ switch (hdr[2]) {
+ case UAC_INPUT_TERMINAL:
+ if (state->mixer->protocol == UAC_VERSION_1) {
+ struct uac_input_terminal_descriptor *d = p1;
+ term->type = le16_to_cpu(d->wTerminalType);
+ term->channels = d->bNrChannels;
+ term->chconfig = le16_to_cpu(d->wChannelConfig);
+ term->name = d->iTerminal;
+ } else { /* UAC_VERSION_2 */
+ struct uac2_input_terminal_descriptor *d = p1;
+ term->type = le16_to_cpu(d->wTerminalType);
+ term->channels = d->bNrChannels;
+ term->chconfig = le32_to_cpu(d->bmChannelConfig);
+ term->name = d->iTerminal;
+
+ /* call recursively to get the clock selectors */
+ err = check_input_term(state, d->bCSourceID, term);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+ case UAC_FEATURE_UNIT: {
+ /* the header is the same for v1 and v2 */
+ struct uac_feature_unit_descriptor *d = p1;
+ id = d->bSourceID;
+ break; /* continue to parse */
+ }
+ case UAC_MIXER_UNIT: {
+ struct uac_mixer_unit_descriptor *d = p1;
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->channels = uac_mixer_unit_bNrChannels(d);
+ term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol);
+ term->name = uac_mixer_unit_iMixer(d);
+ return 0;
+ }
+ case UAC_SELECTOR_UNIT:
+ case UAC2_CLOCK_SELECTOR: {
+ struct uac_selector_unit_descriptor *d = p1;
+ /* call recursively to retrieve the channel info */
+ err = check_input_term(state, d->baSourceID[0], term);
+ if (err < 0)
+ return err;
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->id = id;
+ term->name = uac_selector_unit_iSelector(d);
+ return 0;
+ }
+ case UAC1_PROCESSING_UNIT:
+ case UAC1_EXTENSION_UNIT:
+ /* UAC2_PROCESSING_UNIT_V2 */
+ /* UAC2_EFFECT_UNIT */
+ case UAC2_EXTENSION_UNIT_V2: {
+ struct uac_processing_unit_descriptor *d = p1;
+
+ if (state->mixer->protocol == UAC_VERSION_2 &&
+ hdr[2] == UAC2_EFFECT_UNIT) {
+ /* UAC2/UAC1 unit IDs overlap here in an
+ * uncompatible way. Ignore this unit for now.
+ */
+ return 0;
+ }
+
+ if (d->bNrInPins) {
+ id = d->baSourceID[0];
+ break; /* continue to parse */
+ }
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->channels = uac_processing_unit_bNrChannels(d);
+ term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol);
+ term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol);
+ return 0;
+ }
+ case UAC2_CLOCK_SOURCE: {
+ struct uac_clock_source_descriptor *d = p1;
+ term->type = d->bDescriptorSubtype << 16; /* virtual type */
+ term->id = id;
+ term->name = d->iClockSource;
+ return 0;
+ }
+ default:
+ return -ENODEV;
+ }
+ }
+ return -ENODEV;
+}
+
+/*
+ * Feature Unit
+ */
+
+/* feature unit control information */
+struct usb_feature_control_info {
+ const char *name;
+ unsigned int type; /* control type (mute, volume, etc.) */
+};
+
+static struct usb_feature_control_info audio_feature_info[] = {
+ { "Mute", USB_MIXER_INV_BOOLEAN },
+ { "Volume", USB_MIXER_S16 },
+ { "Tone Control - Bass", USB_MIXER_S8 },
+ { "Tone Control - Mid", USB_MIXER_S8 },
+ { "Tone Control - Treble", USB_MIXER_S8 },
+ { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */
+ { "Auto Gain Control", USB_MIXER_BOOLEAN },
+ { "Delay Control", USB_MIXER_U16 },
+ { "Bass Boost", USB_MIXER_BOOLEAN },
+ { "Loudness", USB_MIXER_BOOLEAN },
+ /* UAC2 specific */
+ { "Input Gain Control", USB_MIXER_U16 },
+ { "Input Gain Pad Control", USB_MIXER_BOOLEAN },
+ { "Phase Inverter Control", USB_MIXER_BOOLEAN },
+};
+
+/* private_free callback */
+void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl)
+{
+ kfree(kctl->private_data);
+ kctl->private_data = NULL;
+}
+
+/*
+ * interface to ALSA control for feature/mixer units
+ */
+
+/* volume control quirks */
+static void volume_control_quirks(struct usb_mixer_elem_info *cval,
+ struct snd_kcontrol *kctl)
+{
+ struct snd_usb_audio *chip = cval->head.mixer->chip;
+ switch (chip->usb_id) {
+ case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */
+ if (strcmp(kctl->id.name, "Effect Duration") == 0) {
+ cval->min = 0x0000;
+ cval->max = 0xffff;
+ cval->res = 0x00e6;
+ break;
+ }
+ if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
+ strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
+ cval->min = 0x00;
+ cval->max = 0xff;
+ break;
+ }
+ if (strstr(kctl->id.name, "Effect Return") != NULL) {
+ cval->min = 0xb706;
+ cval->max = 0xff7b;
+ cval->res = 0x0073;
+ break;
+ }
+ if ((strstr(kctl->id.name, "Playback Volume") != NULL) ||
+ (strstr(kctl->id.name, "Effect Send") != NULL)) {
+ cval->min = 0xb5fb; /* -73 dB = 0xb6ff */
+ cval->max = 0xfcfe;
+ cval->res = 0x0073;
+ }
+ break;
+
+ case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
+ case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
+ if (strcmp(kctl->id.name, "Effect Duration") == 0) {
+ usb_audio_info(chip,
+ "set quirk for FTU Effect Duration\n");
+ cval->min = 0x0000;
+ cval->max = 0x7f00;
+ cval->res = 0x0100;
+ break;
+ }
+ if (strcmp(kctl->id.name, "Effect Volume") == 0 ||
+ strcmp(kctl->id.name, "Effect Feedback Volume") == 0) {
+ usb_audio_info(chip,
+ "set quirks for FTU Effect Feedback/Volume\n");
+ cval->min = 0x00;
+ cval->max = 0x7f;
+ break;
+ }
+ break;
+
+ case USB_ID(0x0471, 0x0101):
+ case USB_ID(0x0471, 0x0104):
+ case USB_ID(0x0471, 0x0105):
+ case USB_ID(0x0672, 0x1041):
+ /* quirk for UDA1321/N101.
+ * note that detection between firmware 2.1.1.7 (N101)
+ * and later 2.1.1.21 is not very clear from datasheets.
+ * I hope that the min value is -15360 for newer firmware --jk
+ */
+ if (!strcmp(kctl->id.name, "PCM Playback Volume") &&
+ cval->min == -15616) {
+ usb_audio_info(chip,
+ "set volume quirk for UDA1321/N101 chip\n");
+ cval->max = -256;
+ }
+ break;
+
+ case USB_ID(0x046d, 0x09a4):
+ if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
+ usb_audio_info(chip,
+ "set volume quirk for QuickCam E3500\n");
+ cval->min = 6080;
+ cval->max = 8768;
+ cval->res = 192;
+ }
+ break;
+
+ case USB_ID(0x046d, 0x0807): /* Logitech Webcam C500 */
+ case USB_ID(0x046d, 0x0808):
+ case USB_ID(0x046d, 0x0809):
+ case USB_ID(0x046d, 0x0819): /* Logitech Webcam C210 */
+ case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
+ case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
+ case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
+ case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
+ case USB_ID(0x046d, 0x08ca): /* Logitech Quickcam Fusion */
+ case USB_ID(0x046d, 0x0991):
+ /* Most audio usb devices lie about volume resolution.
+ * Most Logitech webcams have res = 384.
+ * Proboly there is some logitech magic behind this number --fishor
+ */
+ if (!strcmp(kctl->id.name, "Mic Capture Volume")) {
+ usb_audio_info(chip,
+ "set resolution quirk: cval->res = 384\n");
+ cval->res = 384;
+ }
+ break;
+ }
+}
+
+/*
+ * retrieve the minimum and maximum values for the specified control
+ */
+static int get_min_max_with_quirks(struct usb_mixer_elem_info *cval,
+ int default_min, struct snd_kcontrol *kctl)
+{
+ /* for failsafe */
+ cval->min = default_min;
+ cval->max = cval->min + 1;
+ cval->res = 1;
+ cval->dBmin = cval->dBmax = 0;
+
+ if (cval->val_type == USB_MIXER_BOOLEAN ||
+ cval->val_type == USB_MIXER_INV_BOOLEAN) {
+ cval->initialized = 1;
+ } else {
+ int minchn = 0;
+ if (cval->cmask) {
+ int i;
+ for (i = 0; i < MAX_CHANNELS; i++)
+ if (cval->cmask & (1 << i)) {
+ minchn = i + 1;
+ break;
+ }
+ }
+ if (get_ctl_value(cval, UAC_GET_MAX, (cval->control << 8) | minchn, &cval->max) < 0 ||
+ get_ctl_value(cval, UAC_GET_MIN, (cval->control << 8) | minchn, &cval->min) < 0) {
+ usb_audio_err(cval->head.mixer->chip,
+ "%d:%d: cannot get min/max values for control %d (id %d)\n",
+ cval->head.id, snd_usb_ctrl_intf(cval->head.mixer->chip),
+ cval->control, cval->head.id);
+ return -EINVAL;
+ }
+ if (get_ctl_value(cval, UAC_GET_RES,
+ (cval->control << 8) | minchn,
+ &cval->res) < 0) {
+ cval->res = 1;
+ } else {
+ int last_valid_res = cval->res;
+
+ while (cval->res > 1) {
+ if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES,
+ (cval->control << 8) | minchn,
+ cval->res / 2) < 0)
+ break;
+ cval->res /= 2;
+ }
+ if (get_ctl_value(cval, UAC_GET_RES,
+ (cval->control << 8) | minchn, &cval->res) < 0)
+ cval->res = last_valid_res;
+ }
+ if (cval->res == 0)
+ cval->res = 1;
+
+ /* Additional checks for the proper resolution
+ *
+ * Some devices report smaller resolutions than actually
+ * reacting. They don't return errors but simply clip
+ * to the lower aligned value.
+ */
+ if (cval->min + cval->res < cval->max) {
+ int last_valid_res = cval->res;
+ int saved, test, check;
+ get_cur_mix_raw(cval, minchn, &saved);
+ for (;;) {
+ test = saved;
+ if (test < cval->max)
+ test += cval->res;
+ else
+ test -= cval->res;
+ if (test < cval->min || test > cval->max ||
+ snd_usb_set_cur_mix_value(cval, minchn, 0, test) ||
+ get_cur_mix_raw(cval, minchn, &check)) {
+ cval->res = last_valid_res;
+ break;
+ }
+ if (test == check)
+ break;
+ cval->res *= 2;
+ }
+ snd_usb_set_cur_mix_value(cval, minchn, 0, saved);
+ }
+
+ cval->initialized = 1;
+ }
+
+ if (kctl)
+ volume_control_quirks(cval, kctl);
+
+ /* USB descriptions contain the dB scale in 1/256 dB unit
+ * while ALSA TLV contains in 1/100 dB unit
+ */
+ cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256;
+ cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256;
+ if (cval->dBmin > cval->dBmax) {
+ /* something is wrong; assume it's either from/to 0dB */
+ if (cval->dBmin < 0)
+ cval->dBmax = 0;
+ else if (cval->dBmin > 0)
+ cval->dBmin = 0;
+ if (cval->dBmin > cval->dBmax) {
+ /* totally crap, return an error */
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+#define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL)
+
+/* get a feature/mixer unit info */
+static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+
+ if (cval->val_type == USB_MIXER_BOOLEAN ||
+ cval->val_type == USB_MIXER_INV_BOOLEAN)
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+ else
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = cval->channels;
+ if (cval->val_type == USB_MIXER_BOOLEAN ||
+ cval->val_type == USB_MIXER_INV_BOOLEAN) {
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = 1;
+ } else {
+ if (!cval->initialized) {
+ get_min_max_with_quirks(cval, 0, kcontrol);
+ if (cval->initialized && cval->dBmin >= cval->dBmax) {
+ kcontrol->vd[0].access &=
+ ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK);
+ snd_ctl_notify(cval->head.mixer->chip->card,
+ SNDRV_CTL_EVENT_MASK_INFO,
+ &kcontrol->id);
+ }
+ }
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max =
+ (cval->max - cval->min + cval->res - 1) / cval->res;
+ }
+ return 0;
+}
+
+/* get the current value from feature/mixer unit */
+static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int c, cnt, val, err;
+
+ ucontrol->value.integer.value[0] = cval->min;
+ if (cval->cmask) {
+ cnt = 0;
+ for (c = 0; c < MAX_CHANNELS; c++) {
+ if (!(cval->cmask & (1 << c)))
+ continue;
+ err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &val);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = get_relative_value(cval, val);
+ ucontrol->value.integer.value[cnt] = val;
+ cnt++;
+ }
+ return 0;
+ } else {
+ /* master channel */
+ err = snd_usb_get_cur_mix_value(cval, 0, 0, &val);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = get_relative_value(cval, val);
+ ucontrol->value.integer.value[0] = val;
+ }
+ return 0;
+}
+
+/* put the current value to feature/mixer unit */
+static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int c, cnt, val, oval, err;
+ int changed = 0;
+
+ if (cval->cmask) {
+ cnt = 0;
+ for (c = 0; c < MAX_CHANNELS; c++) {
+ if (!(cval->cmask & (1 << c)))
+ continue;
+ err = snd_usb_get_cur_mix_value(cval, c + 1, cnt, &oval);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = ucontrol->value.integer.value[cnt];
+ val = get_abs_value(cval, val);
+ if (oval != val) {
+ snd_usb_set_cur_mix_value(cval, c + 1, cnt, val);
+ changed = 1;
+ }
+ cnt++;
+ }
+ } else {
+ /* master channel */
+ err = snd_usb_get_cur_mix_value(cval, 0, 0, &oval);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = ucontrol->value.integer.value[0];
+ val = get_abs_value(cval, val);
+ if (val != oval) {
+ snd_usb_set_cur_mix_value(cval, 0, 0, val);
+ changed = 1;
+ }
+ }
+ return changed;
+}
+
+static struct snd_kcontrol_new usb_feature_unit_ctl = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "", /* will be filled later manually */
+ .info = mixer_ctl_feature_info,
+ .get = mixer_ctl_feature_get,
+ .put = mixer_ctl_feature_put,
+};
+
+/* the read-only variant */
+static struct snd_kcontrol_new usb_feature_unit_ctl_ro = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "", /* will be filled later manually */
+ .info = mixer_ctl_feature_info,
+ .get = mixer_ctl_feature_get,
+ .put = NULL,
+};
+
+/*
+ * This symbol is exported in order to allow the mixer quirks to
+ * hook up to the standard feature unit control mechanism
+ */
+struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl;
+
+/*
+ * build a feature control
+ */
+static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str)
+{
+ return strlcat(kctl->id.name, str, sizeof(kctl->id.name));
+}
+
+/*
+ * A lot of headsets/headphones have a "Speaker" mixer. Make sure we
+ * rename it to "Headphone". We determine if something is a headphone
+ * similar to how udev determines form factor.
+ */
+static void check_no_speaker_on_headset(struct snd_kcontrol *kctl,
+ struct snd_card *card)
+{
+ const char *names_to_check[] = {
+ "Headset", "headset", "Headphone", "headphone", NULL};
+ const char **s;
+ bool found = false;
+
+ if (strcmp("Speaker", kctl->id.name))
+ return;
+
+ for (s = names_to_check; *s; s++)
+ if (strstr(card->shortname, *s)) {
+ found = true;
+ break;
+ }
+
+ if (!found)
+ return;
+
+ strlcpy(kctl->id.name, "Headphone", sizeof(kctl->id.name));
+}
+
+static void build_feature_ctl(struct mixer_build *state, void *raw_desc,
+ unsigned int ctl_mask, int control,
+ struct usb_audio_term *iterm, int unitid,
+ int readonly_mask)
+{
+ struct uac_feature_unit_descriptor *desc = raw_desc;
+ unsigned int len = 0;
+ int mapped_name = 0;
+ int nameid = uac_feature_unit_iFeature(desc);
+ struct snd_kcontrol *kctl;
+ struct usb_mixer_elem_info *cval;
+ const struct usbmix_name_map *map;
+ unsigned int range;
+
+ control++; /* change from zero-based to 1-based value */
+
+ if (control == UAC_FU_GRAPHIC_EQUALIZER) {
+ /* FIXME: not supported yet */
+ return;
+ }
+
+ map = find_map(state, unitid, control);
+ if (check_ignored_ctl(map))
+ return;
+
+ cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+ if (!cval)
+ return;
+ snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
+ cval->control = control;
+ cval->cmask = ctl_mask;
+ cval->val_type = audio_feature_info[control-1].type;
+ if (ctl_mask == 0) {
+ cval->channels = 1; /* master channel */
+ cval->master_readonly = readonly_mask;
+ } else {
+ int i, c = 0;
+ for (i = 0; i < 16; i++)
+ if (ctl_mask & (1 << i))
+ c++;
+ cval->channels = c;
+ cval->ch_readonly = readonly_mask;
+ }
+
+ /*
+ * If all channels in the mask are marked read-only, make the control
+ * read-only. snd_usb_set_cur_mix_value() will check the mask again and won't
+ * issue write commands to read-only channels.
+ */
+ if (cval->channels == readonly_mask)
+ kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval);
+ else
+ kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
+
+ if (!kctl) {
+ usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+ kfree(cval);
+ return;
+ }
+ kctl->private_free = snd_usb_mixer_elem_free;
+
+ len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
+ mapped_name = len != 0;
+ if (!len && nameid)
+ len = snd_usb_copy_string_desc(state, nameid,
+ kctl->id.name, sizeof(kctl->id.name));
+
+ switch (control) {
+ case UAC_FU_MUTE:
+ case UAC_FU_VOLUME:
+ /*
+ * determine the control name. the rule is:
+ * - if a name id is given in descriptor, use it.
+ * - if the connected input can be determined, then use the name
+ * of terminal type.
+ * - if the connected output can be determined, use it.
+ * - otherwise, anonymous name.
+ */
+ if (!len) {
+ len = get_term_name(state, iterm, kctl->id.name,
+ sizeof(kctl->id.name), 1);
+ if (!len)
+ len = get_term_name(state, &state->oterm,
+ kctl->id.name,
+ sizeof(kctl->id.name), 1);
+ if (!len)
+ snprintf(kctl->id.name, sizeof(kctl->id.name),
+ "Feature %d", unitid);
+ }
+
+ if (!mapped_name)
+ check_no_speaker_on_headset(kctl, state->mixer->chip->card);
+
+ /*
+ * determine the stream direction:
+ * if the connected output is USB stream, then it's likely a
+ * capture stream. otherwise it should be playback (hopefully :)
+ */
+ if (!mapped_name && !(state->oterm.type >> 16)) {
+ if ((state->oterm.type & 0xff00) == 0x0100)
+ append_ctl_name(kctl, " Capture");
+ else
+ append_ctl_name(kctl, " Playback");
+ }
+ append_ctl_name(kctl, control == UAC_FU_MUTE ?
+ " Switch" : " Volume");
+ break;
+ default:
+ if (!len)
+ strlcpy(kctl->id.name, audio_feature_info[control-1].name,
+ sizeof(kctl->id.name));
+ break;
+ }
+
+ /* get min/max values */
+ get_min_max_with_quirks(cval, 0, kctl);
+
+ if (control == UAC_FU_VOLUME) {
+ check_mapped_dB(map, cval);
+ if (cval->dBmin < cval->dBmax || !cval->initialized) {
+ kctl->tlv.c = snd_usb_mixer_vol_tlv;
+ kctl->vd[0].access |=
+ SNDRV_CTL_ELEM_ACCESS_TLV_READ |
+ SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
+ }
+ }
+
+ range = (cval->max - cval->min) / cval->res;
+ /*
+ * Are there devices with volume range more than 255? I use a bit more
+ * to be sure. 384 is a resolution magic number found on Logitech
+ * devices. It will definitively catch all buggy Logitech devices.
+ */
+ if (range > 384) {
+ usb_audio_warn(state->chip,
+ "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.",
+ range);
+ usb_audio_warn(state->chip,
+ "[%d] FU [%s] ch = %d, val = %d/%d/%d",
+ cval->head.id, kctl->id.name, cval->channels,
+ cval->min, cval->max, cval->res);
+ }
+
+ usb_audio_dbg(state->chip, "[%d] FU [%s] ch = %d, val = %d/%d/%d\n",
+ cval->head.id, kctl->id.name, cval->channels,
+ cval->min, cval->max, cval->res);
+ snd_usb_mixer_add_control(&cval->head, kctl);
+}
+
+/*
+ * parse a feature unit
+ *
+ * most of controls are defined here.
+ */
+static int parse_audio_feature_unit(struct mixer_build *state, int unitid,
+ void *_ftr)
+{
+ int channels, i, j;
+ struct usb_audio_term iterm;
+ unsigned int master_bits, first_ch_bits;
+ int err, csize;
+ struct uac_feature_unit_descriptor *hdr = _ftr;
+ __u8 *bmaControls;
+
+ if (state->mixer->protocol == UAC_VERSION_1) {
+ csize = hdr->bControlSize;
+ if (!csize) {
+ usb_audio_dbg(state->chip,
+ "unit %u: invalid bControlSize == 0\n",
+ unitid);
+ return -EINVAL;
+ }
+ channels = (hdr->bLength - 7) / csize - 1;
+ bmaControls = hdr->bmaControls;
+ if (hdr->bLength < 7 + csize) {
+ usb_audio_err(state->chip,
+ "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
+ unitid);
+ return -EINVAL;
+ }
+ } else {
+ struct uac2_feature_unit_descriptor *ftr = _ftr;
+ csize = 4;
+ channels = (hdr->bLength - 6) / 4 - 1;
+ bmaControls = ftr->bmaControls;
+ if (hdr->bLength < 6 + csize) {
+ usb_audio_err(state->chip,
+ "unit %u: invalid UAC_FEATURE_UNIT descriptor\n",
+ unitid);
+ return -EINVAL;
+ }
+ }
+
+ /* parse the source unit */
+ if ((err = parse_audio_unit(state, hdr->bSourceID)) < 0)
+ return err;
+
+ /* determine the input source type and name */
+ err = check_input_term(state, hdr->bSourceID, &iterm);
+ if (err < 0)
+ return err;
+
+ master_bits = snd_usb_combine_bytes(bmaControls, csize);
+ /* master configuration quirks */
+ switch (state->chip->usb_id) {
+ case USB_ID(0x08bb, 0x2702):
+ usb_audio_info(state->chip,
+ "usbmixer: master volume quirk for PCM2702 chip\n");
+ /* disable non-functional volume control */
+ master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME);
+ break;
+ case USB_ID(0x1130, 0xf211):
+ usb_audio_info(state->chip,
+ "usbmixer: volume control quirk for Tenx TP6911 Audio Headset\n");
+ /* disable non-functional volume control */
+ channels = 0;
+ break;
+
+ }
+ if (channels > 0)
+ first_ch_bits = snd_usb_combine_bytes(bmaControls + csize, csize);
+ else
+ first_ch_bits = 0;
+
+ if (state->mixer->protocol == UAC_VERSION_1) {
+ /* check all control types */
+ for (i = 0; i < 10; i++) {
+ unsigned int ch_bits = 0;
+ for (j = 0; j < channels; j++) {
+ unsigned int mask;
+
+ mask = snd_usb_combine_bytes(bmaControls +
+ csize * (j+1), csize);
+ if (mask & (1 << i))
+ ch_bits |= (1 << j);
+ }
+ /* audio class v1 controls are never read-only */
+
+ /*
+ * The first channel must be set
+ * (for ease of programming).
+ */
+ if (ch_bits & 1)
+ build_feature_ctl(state, _ftr, ch_bits, i,
+ &iterm, unitid, 0);
+ if (master_bits & (1 << i))
+ build_feature_ctl(state, _ftr, 0, i, &iterm,
+ unitid, 0);
+ }
+ } else { /* UAC_VERSION_2 */
+ for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) {
+ unsigned int ch_bits = 0;
+ unsigned int ch_read_only = 0;
+
+ for (j = 0; j < channels; j++) {
+ unsigned int mask;
+
+ mask = snd_usb_combine_bytes(bmaControls +
+ csize * (j+1), csize);
+ if (uac2_control_is_readable(mask, i)) {
+ ch_bits |= (1 << j);
+ if (!uac2_control_is_writeable(mask, i))
+ ch_read_only |= (1 << j);
+ }
+ }
+
+ /*
+ * NOTE: build_feature_ctl() will mark the control
+ * read-only if all channels are marked read-only in
+ * the descriptors. Otherwise, the control will be
+ * reported as writeable, but the driver will not
+ * actually issue a write command for read-only
+ * channels.
+ */
+
+ /*
+ * The first channel must be set
+ * (for ease of programming).
+ */
+ if (ch_bits & 1)
+ build_feature_ctl(state, _ftr, ch_bits, i,
+ &iterm, unitid, ch_read_only);
+ if (uac2_control_is_readable(master_bits, i))
+ build_feature_ctl(state, _ftr, 0, i, &iterm, unitid,
+ !uac2_control_is_writeable(master_bits, i));
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * Mixer Unit
+ */
+
+/*
+ * build a mixer unit control
+ *
+ * the callbacks are identical with feature unit.
+ * input channel number (zero based) is given in control field instead.
+ */
+static void build_mixer_unit_ctl(struct mixer_build *state,
+ struct uac_mixer_unit_descriptor *desc,
+ int in_pin, int in_ch, int unitid,
+ struct usb_audio_term *iterm)
+{
+ struct usb_mixer_elem_info *cval;
+ unsigned int num_outs = uac_mixer_unit_bNrChannels(desc);
+ unsigned int i, len;
+ struct snd_kcontrol *kctl;
+ const struct usbmix_name_map *map;
+
+ map = find_map(state, unitid, 0);
+ if (check_ignored_ctl(map))
+ return;
+
+ cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+ if (!cval)
+ return;
+
+ snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
+ cval->control = in_ch + 1; /* based on 1 */
+ cval->val_type = USB_MIXER_S16;
+ for (i = 0; i < num_outs; i++) {
+ __u8 *c = uac_mixer_unit_bmControls(desc, state->mixer->protocol);
+
+ if (check_matrix_bitmap(c, in_ch, i, num_outs)) {
+ cval->cmask |= (1 << i);
+ cval->channels++;
+ }
+ }
+
+ /* get min/max values */
+ get_min_max(cval, 0);
+
+ kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval);
+ if (!kctl) {
+ usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+ kfree(cval);
+ return;
+ }
+ kctl->private_free = snd_usb_mixer_elem_free;
+
+ len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
+ if (!len)
+ len = get_term_name(state, iterm, kctl->id.name,
+ sizeof(kctl->id.name), 0);
+ if (!len)
+ len = sprintf(kctl->id.name, "Mixer Source %d", in_ch + 1);
+ append_ctl_name(kctl, " Volume");
+
+ usb_audio_dbg(state->chip, "[%d] MU [%s] ch = %d, val = %d/%d\n",
+ cval->head.id, kctl->id.name, cval->channels, cval->min, cval->max);
+ snd_usb_mixer_add_control(&cval->head, kctl);
+}
+
+/*
+ * parse a mixer unit
+ */
+static int parse_audio_mixer_unit(struct mixer_build *state, int unitid,
+ void *raw_desc)
+{
+ struct uac_mixer_unit_descriptor *desc = raw_desc;
+ struct usb_audio_term iterm;
+ int input_pins, num_ins, num_outs;
+ int pin, ich, err;
+
+ if (desc->bLength < 11 || !(input_pins = desc->bNrInPins) ||
+ !(num_outs = uac_mixer_unit_bNrChannels(desc))) {
+ usb_audio_err(state->chip,
+ "invalid MIXER UNIT descriptor %d\n",
+ unitid);
+ return -EINVAL;
+ }
+
+ num_ins = 0;
+ ich = 0;
+ for (pin = 0; pin < input_pins; pin++) {
+ err = parse_audio_unit(state, desc->baSourceID[pin]);
+ if (err < 0)
+ continue;
+ /* no bmControls field (e.g. Maya44) -> ignore */
+ if (desc->bLength <= 10 + input_pins)
+ continue;
+ err = check_input_term(state, desc->baSourceID[pin], &iterm);
+ if (err < 0)
+ return err;
+ num_ins += iterm.channels;
+ for (; ich < num_ins; ich++) {
+ int och, ich_has_controls = 0;
+
+ for (och = 0; och < num_outs; och++) {
+ __u8 *c = uac_mixer_unit_bmControls(desc,
+ state->mixer->protocol);
+
+ if (check_matrix_bitmap(c, ich, och, num_outs)) {
+ ich_has_controls = 1;
+ break;
+ }
+ }
+ if (ich_has_controls)
+ build_mixer_unit_ctl(state, desc, pin, ich,
+ unitid, &iterm);
+ }
+ }
+ return 0;
+}
+
+/*
+ * Processing Unit / Extension Unit
+ */
+
+/* get callback for processing/extension unit */
+static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int err, val;
+
+ err = get_cur_ctl_value(cval, cval->control << 8, &val);
+ if (err < 0) {
+ ucontrol->value.integer.value[0] = cval->min;
+ return filter_error(cval, err);
+ }
+ val = get_relative_value(cval, val);
+ ucontrol->value.integer.value[0] = val;
+ return 0;
+}
+
+/* put callback for processing/extension unit */
+static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int val, oval, err;
+
+ err = get_cur_ctl_value(cval, cval->control << 8, &oval);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = ucontrol->value.integer.value[0];
+ val = get_abs_value(cval, val);
+ if (val != oval) {
+ set_cur_ctl_value(cval, cval->control << 8, val);
+ return 1;
+ }
+ return 0;
+}
+
+/* alsa control interface for processing/extension unit */
+static struct snd_kcontrol_new mixer_procunit_ctl = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "", /* will be filled later */
+ .info = mixer_ctl_feature_info,
+ .get = mixer_ctl_procunit_get,
+ .put = mixer_ctl_procunit_put,
+};
+
+/*
+ * predefined data for processing units
+ */
+struct procunit_value_info {
+ int control;
+ char *suffix;
+ int val_type;
+ int min_value;
+};
+
+struct procunit_info {
+ int type;
+ char *name;
+ struct procunit_value_info *values;
+};
+
+static struct procunit_value_info updown_proc_info[] = {
+ { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
+ { 0 }
+};
+static struct procunit_value_info prologic_proc_info[] = {
+ { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 },
+ { 0 }
+};
+static struct procunit_value_info threed_enh_proc_info[] = {
+ { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 },
+ { 0 }
+};
+static struct procunit_value_info reverb_proc_info[] = {
+ { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 },
+ { UAC_REVERB_TIME, "Time", USB_MIXER_U16 },
+ { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 },
+ { 0 }
+};
+static struct procunit_value_info chorus_proc_info[] = {
+ { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 },
+ { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 },
+ { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 },
+ { 0 }
+};
+static struct procunit_value_info dcr_proc_info[] = {
+ { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN },
+ { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 },
+ { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 },
+ { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 },
+ { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 },
+ { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 },
+ { 0 }
+};
+
+static struct procunit_info procunits[] = {
+ { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info },
+ { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info },
+ { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info },
+ { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info },
+ { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info },
+ { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info },
+ { 0 },
+};
+/*
+ * predefined data for extension units
+ */
+static struct procunit_value_info clock_rate_xu_info[] = {
+ { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 },
+ { 0 }
+};
+static struct procunit_value_info clock_source_xu_info[] = {
+ { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN },
+ { 0 }
+};
+static struct procunit_value_info spdif_format_xu_info[] = {
+ { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN },
+ { 0 }
+};
+static struct procunit_value_info soft_limit_xu_info[] = {
+ { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN },
+ { 0 }
+};
+static struct procunit_info extunits[] = {
+ { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info },
+ { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info },
+ { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info },
+ { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info },
+ { 0 }
+};
+
+/*
+ * build a processing/extension unit
+ */
+static int build_audio_procunit(struct mixer_build *state, int unitid,
+ void *raw_desc, struct procunit_info *list,
+ char *name)
+{
+ struct uac_processing_unit_descriptor *desc = raw_desc;
+ int num_ins = desc->bNrInPins;
+ struct usb_mixer_elem_info *cval;
+ struct snd_kcontrol *kctl;
+ int i, err, nameid, type, len;
+ struct procunit_info *info;
+ struct procunit_value_info *valinfo;
+ const struct usbmix_name_map *map;
+ static struct procunit_value_info default_value_info[] = {
+ { 0x01, "Switch", USB_MIXER_BOOLEAN },
+ { 0 }
+ };
+ static struct procunit_info default_info = {
+ 0, NULL, default_value_info
+ };
+
+ if (desc->bLength < 13 || desc->bLength < 13 + num_ins ||
+ desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) {
+ usb_audio_err(state->chip, "invalid %s descriptor (id %d)\n", name, unitid);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < num_ins; i++) {
+ if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
+ return err;
+ }
+
+ type = le16_to_cpu(desc->wProcessType);
+ for (info = list; info && info->type; info++)
+ if (info->type == type)
+ break;
+ if (!info || !info->type)
+ info = &default_info;
+
+ for (valinfo = info->values; valinfo->control; valinfo++) {
+ __u8 *controls = uac_processing_unit_bmControls(desc, state->mixer->protocol);
+
+ if (!(controls[valinfo->control / 8] & (1 << ((valinfo->control % 8) - 1))))
+ continue;
+ map = find_map(state, unitid, valinfo->control);
+ if (check_ignored_ctl(map))
+ continue;
+ cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+ if (!cval)
+ return -ENOMEM;
+ snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
+ cval->control = valinfo->control;
+ cval->val_type = valinfo->val_type;
+ cval->channels = 1;
+
+ /* get min/max values */
+ if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) {
+ __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol);
+ /* FIXME: hard-coded */
+ cval->min = 1;
+ cval->max = control_spec[0];
+ cval->res = 1;
+ cval->initialized = 1;
+ } else {
+ if (type == USB_XU_CLOCK_RATE) {
+ /*
+ * E-Mu USB 0404/0202/TrackerPre/0204
+ * samplerate control quirk
+ */
+ cval->min = 0;
+ cval->max = 5;
+ cval->res = 1;
+ cval->initialized = 1;
+ } else
+ get_min_max(cval, valinfo->min_value);
+ }
+
+ kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
+ if (!kctl) {
+ kfree(cval);
+ return -ENOMEM;
+ }
+ kctl->private_free = snd_usb_mixer_elem_free;
+
+ if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) {
+ /* nothing */ ;
+ } else if (info->name) {
+ strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name));
+ } else {
+ nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol);
+ len = 0;
+ if (nameid)
+ len = snd_usb_copy_string_desc(state, nameid,
+ kctl->id.name,
+ sizeof(kctl->id.name));
+ if (!len)
+ strlcpy(kctl->id.name, name, sizeof(kctl->id.name));
+ }
+ append_ctl_name(kctl, " ");
+ append_ctl_name(kctl, valinfo->suffix);
+
+ usb_audio_dbg(state->chip,
+ "[%d] PU [%s] ch = %d, val = %d/%d\n",
+ cval->head.id, kctl->id.name, cval->channels,
+ cval->min, cval->max);
+
+ err = snd_usb_mixer_add_control(&cval->head, kctl);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static int parse_audio_processing_unit(struct mixer_build *state, int unitid,
+ void *raw_desc)
+{
+ return build_audio_procunit(state, unitid, raw_desc,
+ procunits, "Processing Unit");
+}
+
+static int parse_audio_extension_unit(struct mixer_build *state, int unitid,
+ void *raw_desc)
+{
+ /*
+ * Note that we parse extension units with processing unit descriptors.
+ * That's ok as the layout is the same.
+ */
+ return build_audio_procunit(state, unitid, raw_desc,
+ extunits, "Extension Unit");
+}
+
+/*
+ * Selector Unit
+ */
+
+/*
+ * info callback for selector unit
+ * use an enumerator type for routing
+ */
+static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ const char **itemlist = (const char **)kcontrol->private_value;
+
+ if (snd_BUG_ON(!itemlist))
+ return -EINVAL;
+ return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist);
+}
+
+/* get callback for selector unit */
+static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int val, err;
+
+ err = get_cur_ctl_value(cval, cval->control << 8, &val);
+ if (err < 0) {
+ ucontrol->value.enumerated.item[0] = 0;
+ return filter_error(cval, err);
+ }
+ val = get_relative_value(cval, val);
+ ucontrol->value.enumerated.item[0] = val;
+ return 0;
+}
+
+/* put callback for selector unit */
+static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct usb_mixer_elem_info *cval = kcontrol->private_data;
+ int val, oval, err;
+
+ err = get_cur_ctl_value(cval, cval->control << 8, &oval);
+ if (err < 0)
+ return filter_error(cval, err);
+ val = ucontrol->value.enumerated.item[0];
+ val = get_abs_value(cval, val);
+ if (val != oval) {
+ set_cur_ctl_value(cval, cval->control << 8, val);
+ return 1;
+ }
+ return 0;
+}
+
+/* alsa control interface for selector unit */
+static struct snd_kcontrol_new mixer_selectunit_ctl = {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = "", /* will be filled later */
+ .info = mixer_ctl_selector_info,
+ .get = mixer_ctl_selector_get,
+ .put = mixer_ctl_selector_put,
+};
+
+/*
+ * private free callback.
+ * free both private_data and private_value
+ */
+static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl)
+{
+ int i, num_ins = 0;
+
+ if (kctl->private_data) {
+ struct usb_mixer_elem_info *cval = kctl->private_data;
+ num_ins = cval->max;
+ kfree(cval);
+ kctl->private_data = NULL;
+ }
+ if (kctl->private_value) {
+ char **itemlist = (char **)kctl->private_value;
+ for (i = 0; i < num_ins; i++)
+ kfree(itemlist[i]);
+ kfree(itemlist);
+ kctl->private_value = 0;
+ }
+}
+
+/*
+ * parse a selector unit
+ */
+static int parse_audio_selector_unit(struct mixer_build *state, int unitid,
+ void *raw_desc)
+{
+ struct uac_selector_unit_descriptor *desc = raw_desc;
+ unsigned int i, nameid, len;
+ int err;
+ struct usb_mixer_elem_info *cval;
+ struct snd_kcontrol *kctl;
+ const struct usbmix_name_map *map;
+ char **namelist;
+
+ if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) {
+ usb_audio_err(state->chip,
+ "invalid SELECTOR UNIT descriptor %d\n", unitid);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < desc->bNrInPins; i++) {
+ if ((err = parse_audio_unit(state, desc->baSourceID[i])) < 0)
+ return err;
+ }
+
+ if (desc->bNrInPins == 1) /* only one ? nonsense! */
+ return 0;
+
+ map = find_map(state, unitid, 0);
+ if (check_ignored_ctl(map))
+ return 0;
+
+ cval = kzalloc(sizeof(*cval), GFP_KERNEL);
+ if (!cval)
+ return -ENOMEM;
+ snd_usb_mixer_elem_init_std(&cval->head, state->mixer, unitid);
+ cval->val_type = USB_MIXER_U8;
+ cval->channels = 1;
+ cval->min = 1;
+ cval->max = desc->bNrInPins;
+ cval->res = 1;
+ cval->initialized = 1;
+
+ if (state->mixer->protocol == UAC_VERSION_1)
+ cval->control = 0;
+ else /* UAC_VERSION_2 */
+ cval->control = (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) ?
+ UAC2_CX_CLOCK_SELECTOR : UAC2_SU_SELECTOR;
+
+ namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL);
+ if (!namelist) {
+ kfree(cval);
+ return -ENOMEM;
+ }
+#define MAX_ITEM_NAME_LEN 64
+ for (i = 0; i < desc->bNrInPins; i++) {
+ struct usb_audio_term iterm;
+ len = 0;
+ namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL);
+ if (!namelist[i]) {
+ while (i--)
+ kfree(namelist[i]);
+ kfree(namelist);
+ kfree(cval);
+ return -ENOMEM;
+ }
+ len = check_mapped_selector_name(state, unitid, i, namelist[i],
+ MAX_ITEM_NAME_LEN);
+ if (! len && check_input_term(state, desc->baSourceID[i], &iterm) >= 0)
+ len = get_term_name(state, &iterm, namelist[i], MAX_ITEM_NAME_LEN, 0);
+ if (! len)
+ sprintf(namelist[i], "Input %u", i);
+ }
+
+ kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval);
+ if (! kctl) {
+ usb_audio_err(state->chip, "cannot malloc kcontrol\n");
+ kfree(namelist);
+ kfree(cval);
+ return -ENOMEM;
+ }
+ kctl->private_value = (unsigned long)namelist;
+ kctl->private_free = usb_mixer_selector_elem_free;
+
+ nameid = uac_selector_unit_iSelector(desc);
+ len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name));
+ if (len)
+ ;
+ else if (nameid)
+ snd_usb_copy_string_desc(state, nameid, kctl->id.name,
+ sizeof(kctl->id.name));
+ else {
+ len = get_term_name(state, &state->oterm,
+ kctl->id.name, sizeof(kctl->id.name), 0);
+ if (!len)
+ strlcpy(kctl->id.name, "USB", sizeof(kctl->id.name));
+
+ if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR)
+ append_ctl_name(kctl, " Clock Source");
+ else if ((state->oterm.type & 0xff00) == 0x0100)
+ append_ctl_name(kctl, " Capture Source");
+ else
+ append_ctl_name(kctl, " Playback Source");
+ }
+
+ usb_audio_dbg(state->chip, "[%d] SU [%s] items = %d\n",
+ cval->head.id, kctl->id.name, desc->bNrInPins);
+ return snd_usb_mixer_add_control(&cval->head, kctl);
+}
+
+/*
+ * parse an audio unit recursively
+ */
+
+static int parse_audio_unit(struct mixer_build *state, int unitid)
+{
+ unsigned char *p1;
+
+ if (test_and_set_bit(unitid, state->unitbitmap))
+ return 0; /* the unit already visited */
+
+ p1 = find_audio_control_unit(state, unitid);
+ if (!p1) {
+ usb_audio_err(state->chip, "unit %d not found!\n", unitid);
+ return -EINVAL;
+ }
+
+ switch (p1[2]) {
+ case UAC_INPUT_TERMINAL:
+ case UAC2_CLOCK_SOURCE:
+ return 0; /* NOP */
+ case UAC_MIXER_UNIT:
+ return parse_audio_mixer_unit(state, unitid, p1);
+ case UAC_SELECTOR_UNIT:
+ case UAC2_CLOCK_SELECTOR:
+ return parse_audio_selector_unit(state, unitid, p1);
+ case UAC_FEATURE_UNIT:
+ return parse_audio_feature_unit(state, unitid, p1);
+ case UAC1_PROCESSING_UNIT:
+ /* UAC2_EFFECT_UNIT has the same value */
+ if (state->mixer->protocol == UAC_VERSION_1)
+ return parse_audio_processing_unit(state, unitid, p1);
+ else
+ return 0; /* FIXME - effect units not implemented yet */
+ case UAC1_EXTENSION_UNIT:
+ /* UAC2_PROCESSING_UNIT_V2 has the same value */
+ if (state->mixer->protocol == UAC_VERSION_1)
+ return parse_audio_extension_unit(state, unitid, p1);
+ else /* UAC_VERSION_2 */
+ return parse_audio_processing_unit(state, unitid, p1);
+ case UAC2_EXTENSION_UNIT_V2:
+ return parse_audio_extension_unit(state, unitid, p1);
+ default:
+ usb_audio_err(state->chip,
+ "unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
+ return -EINVAL;
+ }
+}
+
+static void snd_usb_mixer_free(struct usb_mixer_interface *mixer)
+{
+ kfree(mixer->id_elems);
+ if (mixer->urb) {
+ kfree(mixer->urb->transfer_buffer);
+ usb_free_urb(mixer->urb);
+ }
+ usb_free_urb(mixer->rc_urb);
+ kfree(mixer->rc_setup_packet);
+ kfree(mixer);
+}
+
+static int snd_usb_mixer_dev_free(struct snd_device *device)
+{
+ struct usb_mixer_interface *mixer = device->device_data;
+ snd_usb_mixer_free(mixer);
+ return 0;
+}
+
+/*
+ * create mixer controls
+ *
+ * walk through all UAC_OUTPUT_TERMINAL descriptors to search for mixers
+ */
+static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
+{
+ struct mixer_build state;
+ int err;
+ const struct usbmix_ctl_map *map;
+ void *p;
+
+ memset(&state, 0, sizeof(state));
+ state.chip = mixer->chip;
+ state.mixer = mixer;
+ state.buffer = mixer->hostif->extra;
+ state.buflen = mixer->hostif->extralen;
+
+ /* check the mapping table */
+ for (map = usbmix_ctl_maps; map->id; map++) {
+ if (map->id == state.chip->usb_id) {
+ state.map = map->map;
+ state.selector_map = map->selector_map;
+ mixer->ignore_ctl_error = map->ignore_ctl_error;
+ break;
+ }
+ }
+
+ p = NULL;
+ while ((p = snd_usb_find_csint_desc(mixer->hostif->extra,
+ mixer->hostif->extralen,
+ p, UAC_OUTPUT_TERMINAL)) != NULL) {
+ if (mixer->protocol == UAC_VERSION_1) {
+ struct uac1_output_terminal_descriptor *desc = p;
+
+ if (desc->bLength < sizeof(*desc))
+ continue; /* invalid descriptor? */
+ /* mark terminal ID as visited */
+ set_bit(desc->bTerminalID, state.unitbitmap);
+ state.oterm.id = desc->bTerminalID;
+ state.oterm.type = le16_to_cpu(desc->wTerminalType);
+ state.oterm.name = desc->iTerminal;
+ err = parse_audio_unit(&state, desc->bSourceID);
+ if (err < 0 && err != -EINVAL)
+ return err;
+ } else { /* UAC_VERSION_2 */
+ struct uac2_output_terminal_descriptor *desc = p;
+
+ if (desc->bLength < sizeof(*desc))
+ continue; /* invalid descriptor? */
+ /* mark terminal ID as visited */
+ set_bit(desc->bTerminalID, state.unitbitmap);
+ state.oterm.id = desc->bTerminalID;
+ state.oterm.type = le16_to_cpu(desc->wTerminalType);
+ state.oterm.name = desc->iTerminal;
+ err = parse_audio_unit(&state, desc->bSourceID);
+ if (err < 0 && err != -EINVAL)
+ return err;
+
+ /*
+ * For UAC2, use the same approach to also add the
+ * clock selectors
+ */
+ err = parse_audio_unit(&state, desc->bCSourceID);
+ if (err < 0 && err != -EINVAL)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid)
+{
+ struct usb_mixer_elem_list *list;
+
+ for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem)
+ snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &list->kctl->id);
+}
+
+static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer,
+ struct usb_mixer_elem_list *list)
+{
+ struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
+ static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN",
+ "S8", "U8", "S16", "U16"};
+ snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, "
+ "channels=%i, type=\"%s\"\n", cval->head.id,
+ cval->control, cval->cmask, cval->channels,
+ val_types[cval->val_type]);
+ snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n",
+ cval->min, cval->max, cval->dBmin, cval->dBmax);
+}
+
+static void snd_usb_mixer_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_usb_audio *chip = entry->private_data;
+ struct usb_mixer_interface *mixer;
+ struct usb_mixer_elem_list *list;
+ int unitid;
+
+ list_for_each_entry(mixer, &chip->mixer_list, list) {
+ snd_iprintf(buffer,
+ "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n",
+ chip->usb_id, snd_usb_ctrl_intf(chip),
+ mixer->ignore_ctl_error);
+ snd_iprintf(buffer, "Card: %s\n", chip->card->longname);
+ for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) {
+ for (list = mixer->id_elems[unitid]; list;
+ list = list->next_id_elem) {
+ snd_iprintf(buffer, " Unit: %i\n", list->id);
+ if (list->kctl)
+ snd_iprintf(buffer,
+ " Control: name=\"%s\", index=%i\n",
+ list->kctl->id.name,
+ list->kctl->id.index);
+ if (list->dump)
+ list->dump(buffer, list);
+ }
+ }
+ }
+}
+
+static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer,
+ int attribute, int value, int index)
+{
+ struct usb_mixer_elem_list *list;
+ __u8 unitid = (index >> 8) & 0xff;
+ __u8 control = (value >> 8) & 0xff;
+ __u8 channel = value & 0xff;
+
+ if (channel >= MAX_CHANNELS) {
+ usb_audio_dbg(mixer->chip,
+ "%s(): bogus channel number %d\n",
+ __func__, channel);
+ return;
+ }
+
+ for (list = mixer->id_elems[unitid]; list; list = list->next_id_elem) {
+ struct usb_mixer_elem_info *info;
+
+ if (!list->kctl)
+ continue;
+
+ info = (struct usb_mixer_elem_info *)list;
+ if (info->control != control)
+ continue;
+
+ switch (attribute) {
+ case UAC2_CS_CUR:
+ /* invalidate cache, so the value is read from the device */
+ if (channel)
+ info->cached &= ~(1 << channel);
+ else /* master channel */
+ info->cached = 0;
+
+ snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+ &info->head.kctl->id);
+ break;
+
+ case UAC2_CS_RANGE:
+ /* TODO */
+ break;
+
+ case UAC2_CS_MEM:
+ /* TODO */
+ break;
+
+ default:
+ usb_audio_dbg(mixer->chip,
+ "unknown attribute %d in interrupt\n",
+ attribute);
+ break;
+ } /* switch */
+ }
+}
+
+static void snd_usb_mixer_interrupt(struct urb *urb)
+{
+ struct usb_mixer_interface *mixer = urb->context;
+ int len = urb->actual_length;
+ int ustatus = urb->status;
+
+ if (ustatus != 0)
+ goto requeue;
+
+ if (mixer->protocol == UAC_VERSION_1) {
+ struct uac1_status_word *status;
+
+ for (status = urb->transfer_buffer;
+ len >= sizeof(*status);
+ len -= sizeof(*status), status++) {
+ dev_dbg(&urb->dev->dev, "status interrupt: %02x %02x\n",
+ status->bStatusType,
+ status->bOriginator);
+
+ /* ignore any notifications not from the control interface */
+ if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) !=
+ UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF)
+ continue;
+
+ if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED)
+ snd_usb_mixer_rc_memory_change(mixer, status->bOriginator);
+ else
+ snd_usb_mixer_notify_id(mixer, status->bOriginator);
+ }
+ } else { /* UAC_VERSION_2 */
+ struct uac2_interrupt_data_msg *msg;
+
+ for (msg = urb->transfer_buffer;
+ len >= sizeof(*msg);
+ len -= sizeof(*msg), msg++) {
+ /* drop vendor specific and endpoint requests */
+ if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) ||
+ (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP))
+ continue;
+
+ snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute,
+ le16_to_cpu(msg->wValue),
+ le16_to_cpu(msg->wIndex));
+ }
+ }
+
+requeue:
+ if (ustatus != -ENOENT &&
+ ustatus != -ECONNRESET &&
+ ustatus != -ESHUTDOWN) {
+ urb->dev = mixer->chip->dev;
+ usb_submit_urb(urb, GFP_ATOMIC);
+ }
+}
+
+/* create the handler for the optional status interrupt endpoint */
+static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer)
+{
+ struct usb_endpoint_descriptor *ep;
+ void *transfer_buffer;
+ int buffer_length;
+ unsigned int epnum;
+
+ /* we need one interrupt input endpoint */
+ if (get_iface_desc(mixer->hostif)->bNumEndpoints < 1)
+ return 0;
+ ep = get_endpoint(mixer->hostif, 0);
+ if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_int(ep))
+ return 0;
+
+ epnum = usb_endpoint_num(ep);
+ buffer_length = le16_to_cpu(ep->wMaxPacketSize);
+ transfer_buffer = kmalloc(buffer_length, GFP_KERNEL);
+ if (!transfer_buffer)
+ return -ENOMEM;
+ mixer->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!mixer->urb) {
+ kfree(transfer_buffer);
+ return -ENOMEM;
+ }
+ usb_fill_int_urb(mixer->urb, mixer->chip->dev,
+ usb_rcvintpipe(mixer->chip->dev, epnum),
+ transfer_buffer, buffer_length,
+ snd_usb_mixer_interrupt, mixer, ep->bInterval);
+ usb_submit_urb(mixer->urb, GFP_KERNEL);
+ return 0;
+}
+
+int snd_usb_create_mixer(struct snd_usb_audio *chip, int ctrlif,
+ int ignore_error)
+{
+ static struct snd_device_ops dev_ops = {
+ .dev_free = snd_usb_mixer_dev_free
+ };
+ struct usb_mixer_interface *mixer;
+ struct snd_info_entry *entry;
+ int err;
+
+ strcpy(chip->card->mixername, "USB Mixer");
+
+ mixer = kzalloc(sizeof(*mixer), GFP_KERNEL);
+ if (!mixer)
+ return -ENOMEM;
+ mixer->chip = chip;
+ mixer->ignore_ctl_error = ignore_error;
+ mixer->id_elems = kcalloc(MAX_ID_ELEMS, sizeof(*mixer->id_elems),
+ GFP_KERNEL);
+ if (!mixer->id_elems) {
+ kfree(mixer);
+ return -ENOMEM;
+ }
+
+ mixer->hostif = &usb_ifnum_to_if(chip->dev, ctrlif)->altsetting[0];
+ switch (get_iface_desc(mixer->hostif)->bInterfaceProtocol) {
+ case UAC_VERSION_1:
+ default:
+ mixer->protocol = UAC_VERSION_1;
+ break;
+ case UAC_VERSION_2:
+ mixer->protocol = UAC_VERSION_2;
+ break;
+ }
+
+ if ((err = snd_usb_mixer_controls(mixer)) < 0 ||
+ (err = snd_usb_mixer_status_create(mixer)) < 0)
+ goto _error;
+
+ snd_usb_mixer_apply_create_quirk(mixer);
+
+ err = snd_device_new(chip->card, SNDRV_DEV_CODEC, mixer, &dev_ops);
+ if (err < 0)
+ goto _error;
+
+ if (list_empty(&chip->mixer_list) &&
+ !snd_card_proc_new(chip->card, "usbmixer", &entry))
+ snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read);
+
+ list_add(&mixer->list, &chip->mixer_list);
+ return 0;
+
+_error:
+ snd_usb_mixer_free(mixer);
+ return err;
+}
+
+void snd_usb_mixer_disconnect(struct usb_mixer_interface *mixer)
+{
+ usb_kill_urb(mixer->urb);
+ usb_kill_urb(mixer->rc_urb);
+}
+
+#ifdef CONFIG_PM
+/* stop any bus activity of a mixer */
+static void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer)
+{
+ usb_kill_urb(mixer->urb);
+ usb_kill_urb(mixer->rc_urb);
+}
+
+static int snd_usb_mixer_activate(struct usb_mixer_interface *mixer)
+{
+ int err;
+
+ if (mixer->urb) {
+ err = usb_submit_urb(mixer->urb, GFP_NOIO);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+int snd_usb_mixer_suspend(struct usb_mixer_interface *mixer)
+{
+ snd_usb_mixer_inactivate(mixer);
+ return 0;
+}
+
+static int restore_mixer_value(struct usb_mixer_elem_list *list)
+{
+ struct usb_mixer_elem_info *cval = (struct usb_mixer_elem_info *)list;
+ int c, err, idx;
+
+ if (cval->cmask) {
+ idx = 0;
+ for (c = 0; c < MAX_CHANNELS; c++) {
+ if (!(cval->cmask & (1 << c)))
+ continue;
+ if (cval->cached & (1 << c)) {
+ err = snd_usb_set_cur_mix_value(cval, c + 1, idx,
+ cval->cache_val[idx]);
+ if (err < 0)
+ return err;
+ }
+ idx++;
+ }
+ } else {
+ /* master */
+ if (cval->cached) {
+ err = snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val);
+ if (err < 0)
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
+{
+ struct usb_mixer_elem_list *list;
+ int id, err;
+
+ if (reset_resume) {
+ /* restore cached mixer values */
+ for (id = 0; id < MAX_ID_ELEMS; id++) {
+ for (list = mixer->id_elems[id]; list;
+ list = list->next_id_elem) {
+ if (list->resume) {
+ err = list->resume(list);
+ if (err < 0)
+ return err;
+ }
+ }
+ }
+ }
+
+ return snd_usb_mixer_activate(mixer);
+}
+#endif
+
+void snd_usb_mixer_elem_init_std(struct usb_mixer_elem_list *list,
+ struct usb_mixer_interface *mixer,
+ int unitid)
+{
+ list->mixer = mixer;
+ list->id = unitid;
+ list->dump = snd_usb_mixer_dump_cval;
+#ifdef CONFIG_PM
+ list->resume = restore_mixer_value;
+#endif
+}
Code Review / kvmfornfv.git / blobdiff