| /* |
| * (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); |
| } |
| |
| /* check whether the control should be ignored */ |
| static inline int |
| check_ignored_ctl(const struct usbmix_name_map *p) |
| { |
| if (!p || p->name || p->dB) |
| return 0; |
| return 1; |
| } |
| |
| /* dB mapping */ |
| static inline void check_mapped_dB(const struct usbmix_name_map *p, |
| struct usb_mixer_elem_info *cval) |
| { |
| if (p && p->dB) { |
| cval->dBmin = p->dB->min; |
| cval->dBmax = p->dB->max; |
| cval->initialized = 1; |
| } |
| } |
| |
| /* get the mapped selector source name */ |
| static int check_mapped_selector_name(struct mixer_build *state, int unitid, |
| int index, char *buf, int buflen) |
| { |
| const struct usbmix_selector_map *p; |
| |
| if (! state->selector_map) |
| return 0; |
| for (p = state->selector_map; p->id; p++) { |
| if (p->id == unitid && index < p->count) |
| return strlcpy(buf, p->names[index], buflen); |
| } |
| return 0; |
| } |
| |
| /* |
| * find an audio control unit with the given unit id |
| */ |
| static void *find_audio_control_unit(struct mixer_build *state, unsigned char unit) |
| { |
| /* we just parse the header */ |
| struct uac_feature_unit_descriptor *hdr = NULL; |
| |
| while ((hdr = snd_usb_find_desc(state->buffer, state->buflen, hdr, |
| USB_DT_CS_INTERFACE)) != NULL) { |
| if (hdr->bLength >= 4 && |
| hdr->bDescriptorSubtype >= UAC_INPUT_TERMINAL && |
| hdr->bDescriptorSubtype <= UAC2_SAMPLE_RATE_CONVERTER && |
| hdr->bUnitID == unit) |
| return hdr; |
| } |
| |
| return NULL; |
| } |
| |
| /* |
| * copy a string with the given id |
| */ |
| static int snd_usb_copy_string_desc(struct mixer_build *state, int index, char *buf, int maxlen) |
| { |
| int len = usb_string(state->chip->dev, index, buf, maxlen - 1); |
| buf[len] = 0; |
| return len; |
| } |
| |
| /* |
| * convert from the byte/word on usb descriptor to the zero-based integer |
| */ |
| static int convert_signed_value(struct usb_mixer_elem_info *cval, int val) |
| { |
| switch (cval->val_type) { |
| case USB_MIXER_BOOLEAN: |
| return !!val; |
| case USB_MIXER_INV_BOOLEAN: |
| return !val; |
| case USB_MIXER_U8: |
| val &= 0xff; |
| break; |
| case USB_MIXER_S8: |
| val &= 0xff; |
| if (val >= 0x80) |
| val -= 0x100; |
| break; |
| case USB_MIXER_U16: |
| val &= 0xffff; |
| break; |
| case USB_MIXER_S16: |
| val &= 0xffff; |
| if (val >= 0x8000) |
| val -= 0x10000; |
| break; |
| } |
| return val; |
| } |
| |
| /* |
| * convert from the zero-based int to the byte/word for usb descriptor |
| */ |
| static int convert_bytes_value(struct usb_mixer_elem_info *cval, int val) |
| { |
| switch (cval->val_type) { |
| case USB_MIXER_BOOLEAN: |
| return !!val; |
| case USB_MIXER_INV_BOOLEAN: |
| return !val; |
| case USB_MIXER_S8: |
| case USB_MIXER_U8: |
| return val & 0xff; |
| case USB_MIXER_S16: |
| case USB_MIXER_U16: |
| return val & 0xffff; |
| } |
| return 0; /* not reached */ |
| } |
| |
| static int get_relative_value(struct usb_mixer_elem_info *cval, int val) |
| { |
| if (! cval->res) |
| cval->res = 1; |
| if (val < cval->min) |
| return 0; |
| else if (val >= cval->max) |
| return (cval->max - cval->min + cval->res - 1) / cval->res; |
| else |
| return (val - cval->min) / cval->res; |
| } |
| |
| static int get_abs_value(struct usb_mixer_elem_info *cval, int val) |
| { |
| if (val < 0) |
| return cval->min; |
| if (! cval->res) |
| cval->res = 1; |
| val *= cval->res; |
| val += cval->min; |
| if (val > cval->max) |
| return cval->max; |
| return val; |
| } |
| |
| |
| /* |
| * retrieve a mixer value |
| */ |
| |
| static int get_ctl_value_v1(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) |
| { |
| struct snd_usb_audio *chip = cval->mixer->chip; |
| unsigned char buf[2]; |
| int val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; |
| int timeout = 10; |
| int err; |
| |
| err = snd_usb_autoresume(cval->mixer->chip); |
| if (err < 0) |
| return -EIO; |
| while (timeout-- > 0) { |
| if (snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), request, |
| USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, |
| validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), |
| buf, val_len) >= val_len) { |
| *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); |
| snd_usb_autosuspend(cval->mixer->chip); |
| return 0; |
| } |
| } |
| snd_usb_autosuspend(cval->mixer->chip); |
| snd_printdd(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", |
| request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type); |
| return -EINVAL; |
| } |
| |
| static int get_ctl_value_v2(struct usb_mixer_elem_info *cval, int request, int validx, int *value_ret) |
| { |
| struct snd_usb_audio *chip = cval->mixer->chip; |
| unsigned char buf[2 + 3*sizeof(__u16)]; /* enough space for one range */ |
| unsigned char *val; |
| int 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; |
| |
| ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), bRequest, |
| USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, |
| validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), |
| buf, size); |
| snd_usb_autosuspend(chip); |
| |
| if (ret < 0) { |
| error: |
| snd_printk(KERN_ERR "cannot get ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", |
| request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), 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) |
| { |
| return (cval->mixer->protocol == UAC_VERSION_1) ? |
| get_ctl_value_v1(cval, request, validx, value_ret) : |
| get_ctl_value_v2(cval, request, validx, value_ret); |
| } |
| |
| static int get_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int *value) |
| { |
| return get_ctl_value(cval, UAC_GET_CUR, validx, value); |
| } |
| |
| /* channel = 0: master, 1 = first channel */ |
| static inline int get_cur_mix_raw(struct usb_mixer_elem_info *cval, |
| int channel, int *value) |
| { |
| return get_ctl_value(cval, UAC_GET_CUR, (cval->control << 8) | channel, value); |
| } |
| |
| static int get_cur_mix_value(struct usb_mixer_elem_info *cval, |
| int channel, int index, int *value) |
| { |
| int err; |
| |
| if (cval->cached & (1 << channel)) { |
| *value = cval->cache_val[index]; |
| return 0; |
| } |
| err = get_cur_mix_raw(cval, channel, value); |
| if (err < 0) { |
| if (!cval->mixer->ignore_ctl_error) |
| snd_printd(KERN_ERR "cannot get current value for control %d ch %d: err = %d\n", |
| cval->control, channel, err); |
| return err; |
| } |
| cval->cached |= 1 << channel; |
| cval->cache_val[index] = *value; |
| return 0; |
| } |
| |
| |
| /* |
| * set a mixer value |
| */ |
| |
| int snd_usb_mixer_set_ctl_value(struct usb_mixer_elem_info *cval, |
| int request, int validx, int value_set) |
| { |
| struct snd_usb_audio *chip = cval->mixer->chip; |
| unsigned char buf[2]; |
| int val_len, err, timeout = 10; |
| |
| if (cval->mixer->protocol == UAC_VERSION_1) { |
| val_len = cval->val_type >= USB_MIXER_S16 ? 2 : 1; |
| } else { /* UAC_VERSION_2 */ |
| /* audio class v2 controls are always 2 bytes in size */ |
| val_len = sizeof(__u16); |
| |
| /* FIXME */ |
| if (request != UAC_SET_CUR) { |
| snd_printdd(KERN_WARNING "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; |
| while (timeout-- > 0) |
| if (snd_usb_ctl_msg(chip->dev, |
| usb_sndctrlpipe(chip->dev, 0), request, |
| USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT, |
| validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), |
| buf, val_len) >= 0) { |
| snd_usb_autosuspend(chip); |
| return 0; |
| } |
| snd_usb_autosuspend(chip); |
| snd_printdd(KERN_ERR "cannot set ctl value: req = %#x, wValue = %#x, wIndex = %#x, type = %d, data = %#x/%#x\n", |
| request, validx, snd_usb_ctrl_intf(chip) | (cval->id << 8), cval->val_type, buf[0], buf[1]); |
| return -EINVAL; |
| } |
| |
| static int set_cur_ctl_value(struct usb_mixer_elem_info *cval, int validx, int value) |
| { |
| return snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR, validx, value); |
| } |
| |
| static int set_cur_mix_value(struct usb_mixer_elem_info *cval, int channel, |
| int index, int value) |
| { |
| int err; |
| unsigned int read_only = (channel == 0) ? |
| cval->master_readonly : |
| cval->ch_readonly & (1 << (channel - 1)); |
| |
| if (read_only) { |
| snd_printdd(KERN_INFO "%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 |
| */ |
| static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
| unsigned int size, unsigned int __user *_tlv) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| DECLARE_TLV_DB_MINMAX(scale, 0, 0); |
| |
| if (size < sizeof(scale)) |
| return -ENOMEM; |
| scale[2] = cval->dBmin; |
| scale[3] = cval->dBmax; |
| if (copy_to_user(_tlv, scale, sizeof(scale))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| /* |
| * parser routines begin here... |
| */ |
| |
| static int parse_audio_unit(struct mixer_build *state, int unitid); |
| |
| |
| /* |
| * check if the input/output channel routing is enabled on the given bitmap. |
| * used for mixer unit parser |
| */ |
| static int check_matrix_bitmap(unsigned char *bmap, int ich, int och, int num_outs) |
| { |
| int idx = ich * num_outs + och; |
| return bmap[idx >> 3] & (0x80 >> (idx & 7)); |
| } |
| |
| |
| /* |
| * add an alsa control element |
| * search and increment the index until an empty slot is found. |
| * |
| * if failed, give up and free the control instance. |
| */ |
| |
| int snd_usb_mixer_add_control(struct usb_mixer_interface *mixer, |
| struct snd_kcontrol *kctl) |
| { |
| struct usb_mixer_elem_info *cval = kctl->private_data; |
| int err; |
| |
| while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) |
| kctl->id.index++; |
| if ((err = snd_ctl_add(mixer->chip->card, kctl)) < 0) { |
| snd_printd(KERN_ERR "cannot add control (err = %d)\n", err); |
| return err; |
| } |
| cval->elem_id = &kctl->id; |
| cval->next_id_elem = mixer->id_elems[cval->id]; |
| mixer->id_elems[cval->id] = cval; |
| return 0; |
| } |
| |
| |
| /* |
| * get a terminal name string |
| */ |
| |
| static struct iterm_name_combo { |
| int type; |
| char *name; |
| } iterm_names[] = { |
| { 0x0300, "Output" }, |
| { 0x0301, "Speaker" }, |
| { 0x0302, "Headphone" }, |
| { 0x0303, "HMD Audio" }, |
| { 0x0304, "Desktop Speaker" }, |
| { 0x0305, "Room Speaker" }, |
| { 0x0306, "Com Speaker" }, |
| { 0x0307, "LFE" }, |
| { 0x0600, "External In" }, |
| { 0x0601, "Analog In" }, |
| { 0x0602, "Digital In" }, |
| { 0x0603, "Line" }, |
| { 0x0604, "Legacy In" }, |
| { 0x0605, "IEC958 In" }, |
| { 0x0606, "1394 DA Stream" }, |
| { 0x0607, "1394 DV Stream" }, |
| { 0x0700, "Embedded" }, |
| { 0x0701, "Noise Source" }, |
| { 0x0702, "Equalization Noise" }, |
| { 0x0703, "CD" }, |
| { 0x0704, "DAT" }, |
| { 0x0705, "DCC" }, |
| { 0x0706, "MiniDisk" }, |
| { 0x0707, "Analog Tape" }, |
| { 0x0708, "Phonograph" }, |
| { 0x0709, "VCR Audio" }, |
| { 0x070a, "Video Disk Audio" }, |
| { 0x070b, "DVD Audio" }, |
| { 0x070c, "TV Tuner Audio" }, |
| { 0x070d, "Satellite Rec Audio" }, |
| { 0x070e, "Cable Tuner Audio" }, |
| { 0x070f, "DSS Audio" }, |
| { 0x0710, "Radio Receiver" }, |
| { 0x0711, "Radio Transmitter" }, |
| { 0x0712, "Multi-Track Recorder" }, |
| { 0x0713, "Synthesizer" }, |
| { 0 }, |
| }; |
| |
| static int get_term_name(struct mixer_build *state, struct usb_audio_term *iterm, |
| unsigned char *name, int maxlen, int term_only) |
| { |
| struct iterm_name_combo *names; |
| |
| if (iterm->name) |
| return snd_usb_copy_string_desc(state, iterm->name, name, maxlen); |
| |
| /* virtual type - not a real terminal */ |
| if (iterm->type >> 16) { |
| if (term_only) |
| return 0; |
| switch (iterm->type >> 16) { |
| case UAC_SELECTOR_UNIT: |
| strcpy(name, "Selector"); return 8; |
| case UAC1_PROCESSING_UNIT: |
| strcpy(name, "Process Unit"); return 12; |
| case UAC1_EXTENSION_UNIT: |
| strcpy(name, "Ext Unit"); return 8; |
| case UAC_MIXER_UNIT: |
| strcpy(name, "Mixer"); return 5; |
| default: |
| return sprintf(name, "Unit %d", iterm->id); |
| } |
| } |
| |
| switch (iterm->type & 0xff00) { |
| case 0x0100: |
| strcpy(name, "PCM"); return 3; |
| case 0x0200: |
| strcpy(name, "Mic"); return 3; |
| case 0x0400: |
| strcpy(name, "Headset"); return 7; |
| case 0x0500: |
| strcpy(name, "Phone"); return 5; |
| } |
| |
| for (names = iterm_names; names->type; names++) |
| if (names->type == iterm->type) { |
| strcpy(name, names->name); |
| return strlen(names->name); |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * parse the source unit recursively until it reaches to a terminal |
| * or a branched unit. |
| */ |
| static int check_input_term(struct mixer_build *state, int id, struct usb_audio_term *term) |
| { |
| int err; |
| void *p1; |
| |
| memset(term, 0, sizeof(*term)); |
| while ((p1 = find_audio_control_unit(state, id)) != NULL) { |
| unsigned char *hdr = p1; |
| term->id = id; |
| switch (hdr[2]) { |
| case UAC_INPUT_TERMINAL: |
| if (state->mixer->protocol == UAC_VERSION_1) { |
| struct uac_input_terminal_descriptor *d = p1; |
| term->type = le16_to_cpu(d->wTerminalType); |
| term->channels = d->bNrChannels; |
| term->chconfig = le16_to_cpu(d->wChannelConfig); |
| term->name = d->iTerminal; |
| } else { /* UAC_VERSION_2 */ |
| struct uac2_input_terminal_descriptor *d = p1; |
| term->type = le16_to_cpu(d->wTerminalType); |
| term->channels = d->bNrChannels; |
| term->chconfig = le32_to_cpu(d->bmChannelConfig); |
| term->name = d->iTerminal; |
| |
| /* call recursively to get the clock selectors */ |
| err = check_input_term(state, d->bCSourceID, term); |
| if (err < 0) |
| return err; |
| } |
| return 0; |
| case UAC_FEATURE_UNIT: { |
| /* the header is the same for v1 and v2 */ |
| struct uac_feature_unit_descriptor *d = p1; |
| id = d->bSourceID; |
| break; /* continue to parse */ |
| } |
| case UAC_MIXER_UNIT: { |
| struct uac_mixer_unit_descriptor *d = p1; |
| term->type = d->bDescriptorSubtype << 16; /* virtual type */ |
| term->channels = uac_mixer_unit_bNrChannels(d); |
| term->chconfig = uac_mixer_unit_wChannelConfig(d, state->mixer->protocol); |
| term->name = uac_mixer_unit_iMixer(d); |
| return 0; |
| } |
| case UAC_SELECTOR_UNIT: |
| case UAC2_CLOCK_SELECTOR: { |
| struct uac_selector_unit_descriptor *d = p1; |
| /* call recursively to retrieve the channel info */ |
| if (check_input_term(state, d->baSourceID[0], term) < 0) |
| return -ENODEV; |
| 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: { |
| struct uac_processing_unit_descriptor *d = p1; |
| if (d->bNrInPins) { |
| id = d->baSourceID[0]; |
| break; /* continue to parse */ |
| } |
| term->type = d->bDescriptorSubtype << 16; /* virtual type */ |
| term->channels = uac_processing_unit_bNrChannels(d); |
| term->chconfig = uac_processing_unit_wChannelConfig(d, state->mixer->protocol); |
| term->name = uac_processing_unit_iProcessing(d, state->mixer->protocol); |
| return 0; |
| } |
| case UAC2_CLOCK_SOURCE: { |
| struct uac_clock_source_descriptor *d = p1; |
| term->type = d->bDescriptorSubtype << 16; /* virtual type */ |
| term->id = id; |
| term->name = d->iClockSource; |
| return 0; |
| } |
| default: |
| return -ENODEV; |
| } |
| } |
| return -ENODEV; |
| } |
| |
| |
| /* |
| * Feature Unit |
| */ |
| |
| /* feature unit control information */ |
| struct usb_feature_control_info { |
| const char *name; |
| unsigned int type; /* control type (mute, volume, etc.) */ |
| }; |
| |
| static struct usb_feature_control_info audio_feature_info[] = { |
| { "Mute", USB_MIXER_INV_BOOLEAN }, |
| { "Volume", USB_MIXER_S16 }, |
| { "Tone Control - Bass", USB_MIXER_S8 }, |
| { "Tone Control - Mid", USB_MIXER_S8 }, |
| { "Tone Control - Treble", USB_MIXER_S8 }, |
| { "Graphic Equalizer", USB_MIXER_S8 }, /* FIXME: not implemeted yet */ |
| { "Auto Gain Control", USB_MIXER_BOOLEAN }, |
| { "Delay Control", USB_MIXER_U16 }, |
| { "Bass Boost", USB_MIXER_BOOLEAN }, |
| { "Loudness", USB_MIXER_BOOLEAN }, |
| /* UAC2 specific */ |
| { "Input Gain Control", USB_MIXER_U16 }, |
| { "Input Gain Pad Control", USB_MIXER_BOOLEAN }, |
| { "Phase Inverter Control", USB_MIXER_BOOLEAN }, |
| }; |
| |
| |
| /* private_free callback */ |
| static void usb_mixer_elem_free(struct snd_kcontrol *kctl) |
| { |
| kfree(kctl->private_data); |
| kctl->private_data = NULL; |
| } |
| |
| |
| /* |
| * interface to ALSA control for feature/mixer units |
| */ |
| |
| /* volume control quirks */ |
| static void volume_control_quirks(struct usb_mixer_elem_info *cval, |
| struct snd_kcontrol *kctl) |
| { |
| switch (cval->mixer->chip->usb_id) { |
| 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) { |
| snd_printk(KERN_INFO |
| "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")) { |
| snd_printk(KERN_INFO |
| "set volume quirk for QuickCam E3500\n"); |
| cval->min = 6080; |
| cval->max = 8768; |
| cval->res = 192; |
| } |
| break; |
| |
| case USB_ID(0x046d, 0x0808): |
| case USB_ID(0x046d, 0x0809): |
| 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")) { |
| snd_printk(KERN_INFO |
| "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) { |
| snd_printd(KERN_ERR "%d:%d: cannot get min/max values for control %d (id %d)\n", |
| cval->id, snd_usb_ctrl_intf(cval->mixer->chip), cval->control, cval->id); |
| return -EINVAL; |
| } |
| if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) { |
| cval->res = 1; |
| } else { |
| int last_valid_res = cval->res; |
| |
| while (cval->res > 1) { |
| if (snd_usb_mixer_set_ctl_value(cval, UAC_SET_RES, |
| (cval->control << 8) | minchn, cval->res / 2) < 0) |
| break; |
| cval->res /= 2; |
| } |
| if (get_ctl_value(cval, UAC_GET_RES, (cval->control << 8) | minchn, &cval->res) < 0) |
| cval->res = last_valid_res; |
| } |
| if (cval->res == 0) |
| cval->res = 1; |
| |
| /* Additional checks for the proper resolution |
| * |
| * Some devices report smaller resolutions than actually |
| * reacting. They don't return errors but simply clip |
| * to the lower aligned value. |
| */ |
| if (cval->min + cval->res < cval->max) { |
| int last_valid_res = cval->res; |
| int saved, test, check; |
| get_cur_mix_raw(cval, minchn, &saved); |
| for (;;) { |
| test = saved; |
| if (test < cval->max) |
| test += cval->res; |
| else |
| test -= cval->res; |
| if (test < cval->min || test > cval->max || |
| set_cur_mix_value(cval, minchn, 0, test) || |
| get_cur_mix_raw(cval, minchn, &check)) { |
| cval->res = last_valid_res; |
| break; |
| } |
| if (test == check) |
| break; |
| cval->res *= 2; |
| } |
| set_cur_mix_value(cval, minchn, 0, saved); |
| } |
| |
| cval->initialized = 1; |
| } |
| |
| if (kctl) |
| volume_control_quirks(cval, kctl); |
| |
| /* USB descriptions contain the dB scale in 1/256 dB unit |
| * while ALSA TLV contains in 1/100 dB unit |
| */ |
| cval->dBmin = (convert_signed_value(cval, cval->min) * 100) / 256; |
| cval->dBmax = (convert_signed_value(cval, cval->max) * 100) / 256; |
| if (cval->dBmin > cval->dBmax) { |
| /* something is wrong; assume it's either from/to 0dB */ |
| if (cval->dBmin < 0) |
| cval->dBmax = 0; |
| else if (cval->dBmin > 0) |
| cval->dBmin = 0; |
| if (cval->dBmin > cval->dBmax) { |
| /* totally crap, return an error */ |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| #define get_min_max(cval, def) get_min_max_with_quirks(cval, def, NULL) |
| |
| /* get a feature/mixer unit info */ |
| static int mixer_ctl_feature_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| |
| if (cval->val_type == USB_MIXER_BOOLEAN || |
| cval->val_type == USB_MIXER_INV_BOOLEAN) |
| uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; |
| else |
| uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
| uinfo->count = cval->channels; |
| if (cval->val_type == USB_MIXER_BOOLEAN || |
| cval->val_type == USB_MIXER_INV_BOOLEAN) { |
| uinfo->value.integer.min = 0; |
| uinfo->value.integer.max = 1; |
| } else { |
| if (!cval->initialized) { |
| get_min_max_with_quirks(cval, 0, kcontrol); |
| if (cval->initialized && cval->dBmin >= cval->dBmax) { |
| kcontrol->vd[0].access &= |
| ~(SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
| SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK); |
| snd_ctl_notify(cval->mixer->chip->card, |
| SNDRV_CTL_EVENT_MASK_INFO, |
| &kcontrol->id); |
| } |
| } |
| uinfo->value.integer.min = 0; |
| uinfo->value.integer.max = |
| (cval->max - cval->min + cval->res - 1) / cval->res; |
| } |
| return 0; |
| } |
| |
| /* get the current value from feature/mixer unit */ |
| static int mixer_ctl_feature_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int c, cnt, val, err; |
| |
| ucontrol->value.integer.value[0] = cval->min; |
| if (cval->cmask) { |
| cnt = 0; |
| for (c = 0; c < MAX_CHANNELS; c++) { |
| if (!(cval->cmask & (1 << c))) |
| continue; |
| err = get_cur_mix_value(cval, c + 1, cnt, &val); |
| if (err < 0) |
| return cval->mixer->ignore_ctl_error ? 0 : err; |
| val = get_relative_value(cval, val); |
| ucontrol->value.integer.value[cnt] = val; |
| cnt++; |
| } |
| return 0; |
| } else { |
| /* master channel */ |
| err = get_cur_mix_value(cval, 0, 0, &val); |
| if (err < 0) |
| return cval->mixer->ignore_ctl_error ? 0 : err; |
| val = get_relative_value(cval, val); |
| ucontrol->value.integer.value[0] = val; |
| } |
| return 0; |
| } |
| |
| /* put the current value to feature/mixer unit */ |
| static int mixer_ctl_feature_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int c, cnt, val, oval, err; |
| int changed = 0; |
| |
| if (cval->cmask) { |
| cnt = 0; |
| for (c = 0; c < MAX_CHANNELS; c++) { |
| if (!(cval->cmask & (1 << c))) |
| continue; |
| err = get_cur_mix_value(cval, c + 1, cnt, &oval); |
| if (err < 0) |
| return cval->mixer->ignore_ctl_error ? 0 : err; |
| val = ucontrol->value.integer.value[cnt]; |
| val = get_abs_value(cval, val); |
| if (oval != val) { |
| set_cur_mix_value(cval, c + 1, cnt, val); |
| changed = 1; |
| } |
| cnt++; |
| } |
| } else { |
| /* master channel */ |
| err = get_cur_mix_value(cval, 0, 0, &oval); |
| if (err < 0) |
| return cval->mixer->ignore_ctl_error ? 0 : err; |
| val = ucontrol->value.integer.value[0]; |
| val = get_abs_value(cval, val); |
| if (val != oval) { |
| set_cur_mix_value(cval, 0, 0, val); |
| changed = 1; |
| } |
| } |
| return changed; |
| } |
| |
| static struct snd_kcontrol_new usb_feature_unit_ctl = { |
| .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| .name = "", /* will be filled later manually */ |
| .info = mixer_ctl_feature_info, |
| .get = mixer_ctl_feature_get, |
| .put = mixer_ctl_feature_put, |
| }; |
| |
| /* the read-only variant */ |
| static struct snd_kcontrol_new usb_feature_unit_ctl_ro = { |
| .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| .name = "", /* will be filled later manually */ |
| .info = mixer_ctl_feature_info, |
| .get = mixer_ctl_feature_get, |
| .put = NULL, |
| }; |
| |
| /* This symbol is exported in order to allow the mixer quirks to |
| * hook up to the standard feature unit control mechanism */ |
| struct snd_kcontrol_new *snd_usb_feature_unit_ctl = &usb_feature_unit_ctl; |
| |
| /* |
| * build a feature control |
| */ |
| |
| static size_t append_ctl_name(struct snd_kcontrol *kctl, const char *str) |
| { |
| return strlcat(kctl->id.name, str, sizeof(kctl->id.name)); |
| } |
| |
| 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) { |
| 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 */ |
| cval->master_readonly = readonly_mask; |
| } else { |
| int i, c = 0; |
| for (i = 0; i < 16; i++) |
| if (ctl_mask & (1 << i)) |
| c++; |
| cval->channels = c; |
| cval->ch_readonly = readonly_mask; |
| } |
| |
| /* if all channels in the mask are marked read-only, make the control |
| * read-only. set_cur_mix_value() will check the mask again and won't |
| * issue write commands to read-only channels. */ |
| if (cval->channels == readonly_mask) |
| kctl = snd_ctl_new1(&usb_feature_unit_ctl_ro, cval); |
| else |
| kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); |
| |
| if (! kctl) { |
| snd_printk(KERN_ERR "cannot malloc kcontrol\n"); |
| kfree(cval); |
| return; |
| } |
| kctl->private_free = usb_mixer_elem_free; |
| |
| len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); |
| mapped_name = len != 0; |
| if (! len && nameid) |
| len = snd_usb_copy_string_desc(state, nameid, |
| kctl->id.name, sizeof(kctl->id.name)); |
| |
| /* get min/max values */ |
| get_min_max_with_quirks(cval, 0, kctl); |
| |
| switch (control) { |
| case UAC_FU_MUTE: |
| case UAC_FU_VOLUME: |
| /* determine the control name. the rule is: |
| * - if a name id is given in descriptor, use it. |
| * - if the connected input can be determined, then use the name |
| * of terminal type. |
| * - if the connected output can be determined, use it. |
| * - otherwise, anonymous name. |
| */ |
| if (! len) { |
| len = get_term_name(state, iterm, kctl->id.name, sizeof(kctl->id.name), 1); |
| if (! len) |
| len = get_term_name(state, &state->oterm, kctl->id.name, sizeof(kctl->id.name), 1); |
| if (! len) |
| len = snprintf(kctl->id.name, sizeof(kctl->id.name), |
| "Feature %d", unitid); |
| } |
| /* determine the stream direction: |
| * if the connected output is USB stream, then it's likely a |
| * capture stream. otherwise it should be playback (hopefully :) |
| */ |
| if (! mapped_name && ! (state->oterm.type >> 16)) { |
| if ((state->oterm.type & 0xff00) == 0x0100) { |
| len = append_ctl_name(kctl, " Capture"); |
| } else { |
| len = append_ctl_name(kctl, " Playback"); |
| } |
| } |
| append_ctl_name(kctl, control == UAC_FU_MUTE ? |
| " Switch" : " Volume"); |
| if (control == UAC_FU_VOLUME) { |
| check_mapped_dB(map, cval); |
| if (cval->dBmin < cval->dBmax || !cval->initialized) { |
| kctl->tlv.c = mixer_vol_tlv; |
| kctl->vd[0].access |= |
| SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
| SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK; |
| } |
| } |
| break; |
| |
| default: |
| if (! len) |
| strlcpy(kctl->id.name, audio_feature_info[control-1].name, |
| sizeof(kctl->id.name)); |
| break; |
| } |
| |
| 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) { |
| snd_printk(KERN_WARNING "usb_audio: Warning! Unlikely big " |
| "volume range (=%u), cval->res is probably wrong.", |
| range); |
| snd_printk(KERN_WARNING "usb_audio: [%d] FU [%s] ch = %d, " |
| "val = %d/%d/%d", cval->id, |
| kctl->id.name, cval->channels, |
| cval->min, cval->max, cval->res); |
| } |
| |
| 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); |
| snd_usb_mixer_add_control(state->mixer, kctl); |
| } |
| |
| |
| |
| /* |
| * parse a feature unit |
| * |
| * most of controls are defined here. |
| */ |
| static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void *_ftr) |
| { |
| int channels, i, j; |
| struct usb_audio_term iterm; |
| unsigned int master_bits, first_ch_bits; |
| int err, csize; |
| struct uac_feature_unit_descriptor *hdr = _ftr; |
| __u8 *bmaControls; |
| |
| if (state->mixer->protocol == UAC_VERSION_1) { |
| csize = hdr->bControlSize; |
| if (!csize) { |
| snd_printdd(KERN_ERR "usbaudio: unit %u: " |
| "invalid bControlSize == 0\n", unitid); |
| return -EINVAL; |
| } |
| channels = (hdr->bLength - 7) / csize - 1; |
| bmaControls = hdr->bmaControls; |
| } else { |
| struct uac2_feature_unit_descriptor *ftr = _ftr; |
| csize = 4; |
| channels = (hdr->bLength - 6) / 4 - 1; |
| bmaControls = ftr->bmaControls; |
| } |
| |
| if (hdr->bLength < 7 || !csize || hdr->bLength < 7 + csize) { |
| snd_printk(KERN_ERR "usbaudio: 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 */ |
| if (check_input_term(state, hdr->bSourceID, &iterm) < 0) |
| return -EINVAL; |
| |
| master_bits = snd_usb_combine_bytes(bmaControls, csize); |
| /* master configuration quirks */ |
| switch (state->chip->usb_id) { |
| case USB_ID(0x08bb, 0x2702): |
| snd_printk(KERN_INFO |
| "usbmixer: master volume quirk for PCM2702 chip\n"); |
| /* disable non-functional volume control */ |
| master_bits &= ~UAC_CONTROL_BIT(UAC_FU_VOLUME); |
| 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 = 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 */ |
| if (ch_bits & 1) /* the first channel must be set (for ease of programming) */ |
| 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 = 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 */ |
| if (ch_bits & 1) /* the first channel must be set (for ease of programming) */ |
| build_feature_ctl(state, _ftr, ch_bits, i, &iterm, unitid, ch_read_only); |
| if (uac2_control_is_readable(master_bits, i)) |
| build_feature_ctl(state, _ftr, 0, i, &iterm, unitid, |
| !uac2_control_is_writeable(master_bits, i)); |
| } |
| } |
| |
| return 0; |
| } |
| |
| |
| /* |
| * Mixer Unit |
| */ |
| |
| /* |
| * build a mixer unit control |
| * |
| * the callbacks are identical with feature unit. |
| * input channel number (zero based) is given in control field instead. |
| */ |
| |
| static void build_mixer_unit_ctl(struct mixer_build *state, |
| struct uac_mixer_unit_descriptor *desc, |
| int in_pin, int in_ch, int unitid, |
| struct usb_audio_term *iterm) |
| { |
| struct usb_mixer_elem_info *cval; |
| unsigned int num_outs = uac_mixer_unit_bNrChannels(desc); |
| unsigned int i, len; |
| struct snd_kcontrol *kctl; |
| const struct usbmix_name_map *map; |
| |
| map = find_map(state, unitid, 0); |
| if (check_ignored_ctl(map)) |
| return; |
| |
| cval = kzalloc(sizeof(*cval), GFP_KERNEL); |
| if (! cval) |
| return; |
| |
| cval->mixer = state->mixer; |
| cval->id = unitid; |
| cval->control = in_ch + 1; /* based on 1 */ |
| cval->val_type = USB_MIXER_S16; |
| for (i = 0; i < num_outs; i++) { |
| if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), in_ch, i, num_outs)) { |
| cval->cmask |= (1 << i); |
| cval->channels++; |
| } |
| } |
| |
| /* get min/max values */ |
| get_min_max(cval, 0); |
| |
| kctl = snd_ctl_new1(&usb_feature_unit_ctl, cval); |
| if (! kctl) { |
| snd_printk(KERN_ERR "cannot malloc kcontrol\n"); |
| kfree(cval); |
| return; |
| } |
| kctl->private_free = usb_mixer_elem_free; |
| |
| len = check_mapped_name(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"); |
| |
| snd_printdd(KERN_INFO "[%d] MU [%s] ch = %d, val = %d/%d\n", |
| cval->id, kctl->id.name, cval->channels, cval->min, cval->max); |
| snd_usb_mixer_add_control(state->mixer, kctl); |
| } |
| |
| |
| /* |
| * parse a mixer unit |
| */ |
| static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *raw_desc) |
| { |
| struct uac_mixer_unit_descriptor *desc = raw_desc; |
| struct usb_audio_term iterm; |
| int input_pins, num_ins, num_outs; |
| int pin, ich, err; |
| |
| if (desc->bLength < 11 || ! (input_pins = desc->bNrInPins) || ! (num_outs = uac_mixer_unit_bNrChannels(desc))) { |
| snd_printk(KERN_ERR "invalid MIXER UNIT descriptor %d\n", unitid); |
| return -EINVAL; |
| } |
| /* no bmControls field (e.g. Maya44) -> ignore */ |
| if (desc->bLength <= 10 + input_pins) { |
| snd_printdd(KERN_INFO "MU %d has no bmControls field\n", unitid); |
| return 0; |
| } |
| |
| num_ins = 0; |
| ich = 0; |
| for (pin = 0; pin < input_pins; pin++) { |
| err = parse_audio_unit(state, desc->baSourceID[pin]); |
| if (err < 0) |
| return err; |
| 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) { |
| if (check_matrix_bitmap(uac_mixer_unit_bmControls(desc, state->mixer->protocol), |
| ich, och, num_outs)) { |
| ich_has_controls = 1; |
| break; |
| } |
| } |
| if (ich_has_controls) |
| build_mixer_unit_ctl(state, desc, pin, ich, |
| unitid, &iterm); |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* |
| * Processing Unit / Extension Unit |
| */ |
| |
| /* get callback for processing/extension unit */ |
| static int mixer_ctl_procunit_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int err, val; |
| |
| err = get_cur_ctl_value(cval, cval->control << 8, &val); |
| if (err < 0 && cval->mixer->ignore_ctl_error) { |
| ucontrol->value.integer.value[0] = cval->min; |
| return 0; |
| } |
| if (err < 0) |
| return err; |
| val = get_relative_value(cval, val); |
| ucontrol->value.integer.value[0] = val; |
| return 0; |
| } |
| |
| /* put callback for processing/extension unit */ |
| static int mixer_ctl_procunit_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int val, oval, err; |
| |
| err = get_cur_ctl_value(cval, cval->control << 8, &oval); |
| if (err < 0) { |
| if (cval->mixer->ignore_ctl_error) |
| return 0; |
| return err; |
| } |
| val = ucontrol->value.integer.value[0]; |
| val = get_abs_value(cval, val); |
| if (val != oval) { |
| set_cur_ctl_value(cval, cval->control << 8, val); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* alsa control interface for processing/extension unit */ |
| static struct snd_kcontrol_new mixer_procunit_ctl = { |
| .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| .name = "", /* will be filled later */ |
| .info = mixer_ctl_feature_info, |
| .get = mixer_ctl_procunit_get, |
| .put = mixer_ctl_procunit_put, |
| }; |
| |
| |
| /* |
| * predefined data for processing units |
| */ |
| struct procunit_value_info { |
| int control; |
| char *suffix; |
| int val_type; |
| int min_value; |
| }; |
| |
| struct procunit_info { |
| int type; |
| char *name; |
| struct procunit_value_info *values; |
| }; |
| |
| static struct procunit_value_info updown_proc_info[] = { |
| { UAC_UD_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, |
| { 0 } |
| }; |
| static struct procunit_value_info prologic_proc_info[] = { |
| { UAC_DP_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_DP_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, |
| { 0 } |
| }; |
| static struct procunit_value_info threed_enh_proc_info[] = { |
| { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, |
| { 0 } |
| }; |
| static struct procunit_value_info reverb_proc_info[] = { |
| { UAC_REVERB_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_REVERB_LEVEL, "Level", USB_MIXER_U8 }, |
| { UAC_REVERB_TIME, "Time", USB_MIXER_U16 }, |
| { UAC_REVERB_FEEDBACK, "Feedback", USB_MIXER_U8 }, |
| { 0 } |
| }; |
| static struct procunit_value_info chorus_proc_info[] = { |
| { UAC_CHORUS_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_CHORUS_LEVEL, "Level", USB_MIXER_U8 }, |
| { UAC_CHORUS_RATE, "Rate", USB_MIXER_U16 }, |
| { UAC_CHORUS_DEPTH, "Depth", USB_MIXER_U16 }, |
| { 0 } |
| }; |
| static struct procunit_value_info dcr_proc_info[] = { |
| { UAC_DCR_ENABLE, "Switch", USB_MIXER_BOOLEAN }, |
| { UAC_DCR_RATE, "Ratio", USB_MIXER_U16 }, |
| { UAC_DCR_MAXAMPL, "Max Amp", USB_MIXER_S16 }, |
| { UAC_DCR_THRESHOLD, "Threshold", USB_MIXER_S16 }, |
| { UAC_DCR_ATTACK_TIME, "Attack Time", USB_MIXER_U16 }, |
| { UAC_DCR_RELEASE_TIME, "Release Time", USB_MIXER_U16 }, |
| { 0 } |
| }; |
| |
| static struct procunit_info procunits[] = { |
| { UAC_PROCESS_UP_DOWNMIX, "Up Down", updown_proc_info }, |
| { UAC_PROCESS_DOLBY_PROLOGIC, "Dolby Prologic", prologic_proc_info }, |
| { UAC_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", threed_enh_proc_info }, |
| { UAC_PROCESS_REVERB, "Reverb", reverb_proc_info }, |
| { UAC_PROCESS_CHORUS, "Chorus", chorus_proc_info }, |
| { UAC_PROCESS_DYN_RANGE_COMP, "DCR", dcr_proc_info }, |
| { 0 }, |
| }; |
| /* |
| * predefined data for extension units |
| */ |
| static struct procunit_value_info clock_rate_xu_info[] = { |
| { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, |
| { 0 } |
| }; |
| static struct procunit_value_info clock_source_xu_info[] = { |
| { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, |
| { 0 } |
| }; |
| static struct procunit_value_info spdif_format_xu_info[] = { |
| { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, |
| { 0 } |
| }; |
| static struct procunit_value_info soft_limit_xu_info[] = { |
| { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, |
| { 0 } |
| }; |
| static struct procunit_info extunits[] = { |
| { USB_XU_CLOCK_RATE, "Clock rate", clock_rate_xu_info }, |
| { USB_XU_CLOCK_SOURCE, "DigitalIn CLK source", clock_source_xu_info }, |
| { USB_XU_DIGITAL_IO_STATUS, "DigitalOut format:", spdif_format_xu_info }, |
| { USB_XU_DEVICE_OPTIONS, "AnalogueIn Soft Limit", soft_limit_xu_info }, |
| { 0 } |
| }; |
| /* |
| * build a processing/extension unit |
| */ |
| static int build_audio_procunit(struct mixer_build *state, int unitid, void *raw_desc, struct procunit_info *list, char *name) |
| { |
| struct uac_processing_unit_descriptor *desc = raw_desc; |
| int num_ins = desc->bNrInPins; |
| struct usb_mixer_elem_info *cval; |
| struct snd_kcontrol *kctl; |
| int i, err, nameid, type, len; |
| struct procunit_info *info; |
| struct procunit_value_info *valinfo; |
| const struct usbmix_name_map *map; |
| static struct procunit_value_info default_value_info[] = { |
| { 0x01, "Switch", USB_MIXER_BOOLEAN }, |
| { 0 } |
| }; |
| static struct procunit_info default_info = { |
| 0, NULL, default_value_info |
| }; |
| |
| if (desc->bLength < 13 || desc->bLength < 13 + num_ins || |
| desc->bLength < num_ins + uac_processing_unit_bControlSize(desc, state->mixer->protocol)) { |
| snd_printk(KERN_ERR "invalid %s descriptor (id %d)\n", name, unitid); |
| return -EINVAL; |
| } |
| |
| for (i = 0; i < num_ins; i++) { |
| if ((err = parse_audio_unit(state, 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) { |
| snd_printk(KERN_ERR "cannot malloc kcontrol\n"); |
| return -ENOMEM; |
| } |
| cval->mixer = state->mixer; |
| cval->id = unitid; |
| cval->control = valinfo->control; |
| cval->val_type = valinfo->val_type; |
| cval->channels = 1; |
| |
| /* get min/max values */ |
| if (type == UAC_PROCESS_UP_DOWNMIX && cval->control == UAC_UD_MODE_SELECT) { |
| __u8 *control_spec = uac_processing_unit_specific(desc, state->mixer->protocol); |
| /* FIXME: hard-coded */ |
| cval->min = 1; |
| cval->max = control_spec[0]; |
| cval->res = 1; |
| cval->initialized = 1; |
| } else { |
| if (type == USB_XU_CLOCK_RATE) { |
| /* E-Mu USB 0404/0202/TrackerPre/0204 |
| * samplerate control quirk |
| */ |
| cval->min = 0; |
| cval->max = 5; |
| cval->res = 1; |
| cval->initialized = 1; |
| } else |
| get_min_max(cval, valinfo->min_value); |
| } |
| |
| kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); |
| if (! kctl) { |
| snd_printk(KERN_ERR "cannot malloc kcontrol\n"); |
| kfree(cval); |
| return -ENOMEM; |
| } |
| kctl->private_free = usb_mixer_elem_free; |
| |
| if (check_mapped_name(map, kctl->id.name, |
| sizeof(kctl->id.name))) |
| /* nothing */ ; |
| else if (info->name) |
| strlcpy(kctl->id.name, info->name, sizeof(kctl->id.name)); |
| else { |
| nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); |
| len = 0; |
| if (nameid) |
| len = snd_usb_copy_string_desc(state, nameid, kctl->id.name, sizeof(kctl->id.name)); |
| if (! len) |
| strlcpy(kctl->id.name, name, sizeof(kctl->id.name)); |
| } |
| append_ctl_name(kctl, " "); |
| append_ctl_name(kctl, valinfo->suffix); |
| |
| snd_printdd(KERN_INFO "[%d] PU [%s] ch = %d, val = %d/%d\n", |
| cval->id, kctl->id.name, cval->channels, cval->min, cval->max); |
| if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0) |
| return err; |
| } |
| return 0; |
| } |
| |
| |
| static int parse_audio_processing_unit(struct mixer_build *state, int unitid, void *raw_desc) |
| { |
| return build_audio_procunit(state, unitid, raw_desc, procunits, "Processing Unit"); |
| } |
| |
| static int parse_audio_extension_unit(struct mixer_build *state, int unitid, void *raw_desc) |
| { |
| /* Note that we parse extension units with processing unit descriptors. |
| * That's ok as the layout is the same */ |
| return build_audio_procunit(state, unitid, raw_desc, extunits, "Extension Unit"); |
| } |
| |
| |
| /* |
| * Selector Unit |
| */ |
| |
| /* info callback for selector unit |
| * use an enumerator type for routing |
| */ |
| static int mixer_ctl_selector_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| const char **itemlist = (const char **)kcontrol->private_value; |
| |
| if (snd_BUG_ON(!itemlist)) |
| return -EINVAL; |
| return snd_ctl_enum_info(uinfo, 1, cval->max, itemlist); |
| } |
| |
| /* get callback for selector unit */ |
| static int mixer_ctl_selector_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int val, err; |
| |
| err = get_cur_ctl_value(cval, cval->control << 8, &val); |
| if (err < 0) { |
| if (cval->mixer->ignore_ctl_error) { |
| ucontrol->value.enumerated.item[0] = 0; |
| return 0; |
| } |
| return err; |
| } |
| val = get_relative_value(cval, val); |
| ucontrol->value.enumerated.item[0] = val; |
| return 0; |
| } |
| |
| /* put callback for selector unit */ |
| static int mixer_ctl_selector_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
| { |
| struct usb_mixer_elem_info *cval = kcontrol->private_data; |
| int val, oval, err; |
| |
| err = get_cur_ctl_value(cval, cval->control << 8, &oval); |
| if (err < 0) { |
| if (cval->mixer->ignore_ctl_error) |
| return 0; |
| return err; |
| } |
| val = ucontrol->value.enumerated.item[0]; |
| val = get_abs_value(cval, val); |
| if (val != oval) { |
| set_cur_ctl_value(cval, cval->control << 8, val); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* alsa control interface for selector unit */ |
| static struct snd_kcontrol_new mixer_selectunit_ctl = { |
| .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
| .name = "", /* will be filled later */ |
| .info = mixer_ctl_selector_info, |
| .get = mixer_ctl_selector_get, |
| .put = mixer_ctl_selector_put, |
| }; |
| |
| |
| /* private free callback. |
| * free both private_data and private_value |
| */ |
| static void usb_mixer_selector_elem_free(struct snd_kcontrol *kctl) |
| { |
| int i, num_ins = 0; |
| |
| if (kctl->private_data) { |
| struct usb_mixer_elem_info *cval = kctl->private_data; |
| num_ins = cval->max; |
| kfree(cval); |
| kctl->private_data = NULL; |
| } |
| if (kctl->private_value) { |
| char **itemlist = (char **)kctl->private_value; |
| for (i = 0; i < num_ins; i++) |
| kfree(itemlist[i]); |
| kfree(itemlist); |
| kctl->private_value = 0; |
| } |
| } |
| |
| /* |
| * parse a selector unit |
| */ |
| static int parse_audio_selector_unit(struct mixer_build *state, int unitid, void *raw_desc) |
| { |
| struct uac_selector_unit_descriptor *desc = raw_desc; |
| unsigned int i, nameid, len; |
| int err; |
| struct usb_mixer_elem_info *cval; |
| struct snd_kcontrol *kctl; |
| const struct usbmix_name_map *map; |
| char **namelist; |
| |
| if (!desc->bNrInPins || desc->bLength < 5 + desc->bNrInPins) { |
| snd_printk(KERN_ERR "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) { |
| snd_printk(KERN_ERR "cannot malloc kcontrol\n"); |
| return -ENOMEM; |
| } |
| cval->mixer = state->mixer; |
| cval->id = unitid; |
| cval->val_type = USB_MIXER_U8; |
| cval->channels = 1; |
| cval->min = 1; |
| cval->max = desc->bNrInPins; |
| cval->res = 1; |
| cval->initialized = 1; |
| |
| if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR) |
| cval->control = UAC2_CX_CLOCK_SELECTOR; |
| else |
| cval->control = 0; |
| |
| namelist = kmalloc(sizeof(char *) * desc->bNrInPins, GFP_KERNEL); |
| if (! namelist) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| kfree(cval); |
| return -ENOMEM; |
| } |
| #define MAX_ITEM_NAME_LEN 64 |
| for (i = 0; i < desc->bNrInPins; i++) { |
| struct usb_audio_term iterm; |
| len = 0; |
| namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); |
| if (! namelist[i]) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| 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 %d", i); |
| } |
| |
| kctl = snd_ctl_new1(&mixer_selectunit_ctl, cval); |
| if (! kctl) { |
| snd_printk(KERN_ERR "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"); |
| } |
| |
| snd_printdd(KERN_INFO "[%d] SU [%s] items = %d\n", |
| cval->id, kctl->id.name, desc->bNrInPins); |
| if ((err = snd_usb_mixer_add_control(state->mixer, kctl)) < 0) |
| return err; |
| |
| return 0; |
| } |
| |
| |
| /* |
| * parse an audio unit recursively |
| */ |
| |
| static int parse_audio_unit(struct mixer_build *state, int unitid) |
| { |
| unsigned char *p1; |
| |
| if (test_and_set_bit(unitid, state->unitbitmap)) |
| return 0; /* the unit already visited */ |
| |
| p1 = find_audio_control_unit(state, unitid); |
| if (!p1) { |
| snd_printk(KERN_ERR "usbaudio: 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); |
| default: |
| snd_printk(KERN_ERR "usbaudio: 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? */ |
| set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */ |
| 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) |
| return err; |
| } else { /* UAC_VERSION_2 */ |
| struct uac2_output_terminal_descriptor *desc = p; |
| |
| if (desc->bLength < sizeof(*desc)) |
| continue; /* invalid descriptor? */ |
| set_bit(desc->bTerminalID, state.unitbitmap); /* mark terminal ID as visited */ |
| 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) |
| return err; |
| |
| /* for UAC2, use the same approach to also add the clock selectors */ |
| err = parse_audio_unit(&state, desc->bCSourceID); |
| if (err < 0) |
| return err; |
| } |
| } |
| |
| return 0; |
| } |
| |
| void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) |
| { |
| struct usb_mixer_elem_info *info; |
| |
| for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) |
| snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, |
| info->elem_id); |
| } |
| |
| static void snd_usb_mixer_dump_cval(struct snd_info_buffer *buffer, |
| int unitid, |
| struct usb_mixer_elem_info *cval) |
| { |
| static char *val_types[] = {"BOOLEAN", "INV_BOOLEAN", |
| "S8", "U8", "S16", "U16"}; |
| snd_iprintf(buffer, " Unit: %i\n", unitid); |
| if (cval->elem_id) |
| snd_iprintf(buffer, " Control: name=\"%s\", index=%i\n", |
| cval->elem_id->name, cval->elem_id->index); |
| snd_iprintf(buffer, " Info: id=%i, control=%i, cmask=0x%x, " |
| "channels=%i, type=\"%s\"\n", cval->id, |
| cval->control, cval->cmask, cval->channels, |
| val_types[cval->val_type]); |
| snd_iprintf(buffer, " Volume: min=%i, max=%i, dBmin=%i, dBmax=%i\n", |
| cval->min, cval->max, cval->dBmin, cval->dBmax); |
| } |
| |
| static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, |
| struct snd_info_buffer *buffer) |
| { |
| struct snd_usb_audio *chip = entry->private_data; |
| struct usb_mixer_interface *mixer; |
| struct usb_mixer_elem_info *cval; |
| int unitid; |
| |
| list_for_each_entry(mixer, &chip->mixer_list, list) { |
| snd_iprintf(buffer, |
| "USB Mixer: usb_id=0x%08x, ctrlif=%i, ctlerr=%i\n", |
| chip->usb_id, snd_usb_ctrl_intf(chip), |
| mixer->ignore_ctl_error); |
| snd_iprintf(buffer, "Card: %s\n", chip->card->longname); |
| for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { |
| for (cval = mixer->id_elems[unitid]; cval; |
| cval = cval->next_id_elem) |
| snd_usb_mixer_dump_cval(buffer, unitid, cval); |
| } |
| } |
| } |
| |
| static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, |
| int attribute, int value, int index) |
| { |
| struct usb_mixer_elem_info *info; |
| __u8 unitid = (index >> 8) & 0xff; |
| __u8 control = (value >> 8) & 0xff; |
| __u8 channel = value & 0xff; |
| |
| if (channel >= MAX_CHANNELS) { |
| snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n", |
| __func__, channel); |
| return; |
| } |
| |
| for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) { |
| if (info->control != control) |
| continue; |
| |
| switch (attribute) { |
| case UAC2_CS_CUR: |
| /* invalidate cache, so the value is read from the device */ |
| if (channel) |
| info->cached &= ~(1 << channel); |
| else /* master channel */ |
| info->cached = 0; |
| |
| snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, |
| info->elem_id); |
| break; |
| |
| case UAC2_CS_RANGE: |
| /* TODO */ |
| break; |
| |
| case UAC2_CS_MEM: |
| /* TODO */ |
| break; |
| |
| default: |
| snd_printk(KERN_DEBUG "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++) { |
| snd_printd(KERN_DEBUG "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); |
| } |
| } |
| |
| /* stop any bus activity of a mixer */ |
| void snd_usb_mixer_inactivate(struct usb_mixer_interface *mixer) |
| { |
| usb_kill_urb(mixer->urb); |
| usb_kill_urb(mixer->rc_urb); |
| } |
| |
| 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; |
| } |
| |
| /* 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_LOWLEVEL, mixer, &dev_ops); |
| if (err < 0) |
| goto _error; |
| |
| if (list_empty(&chip->mixer_list) && |
| !snd_card_proc_new(chip->card, "usbmixer", &entry)) |
| snd_info_set_text_ops(entry, chip, snd_usb_mixer_proc_read); |
| |
| list_add(&mixer->list, &chip->mixer_list); |
| return 0; |
| |
| _error: |
| snd_usb_mixer_free(mixer); |
| return err; |
| } |
| |
| void snd_usb_mixer_disconnect(struct list_head *p) |
| { |
| struct usb_mixer_interface *mixer; |
| |
| mixer = list_entry(p, struct usb_mixer_interface, list); |
| usb_kill_urb(mixer->urb); |
| usb_kill_urb(mixer->rc_urb); |
| } |