diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/usb/mixer.c | 3730 |
1 files changed, 3730 insertions, 0 deletions
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c new file mode 100644 index 000000000..783a24937 --- /dev/null +++ b/sound/usb/mixer.c @@ -0,0 +1,3730 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * (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) + */ + +/* + * 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/log2.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 <linux/usb/audio-v3.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); + DECLARE_BITMAP(termbitmap, 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(const struct usbmix_name_map *p, int unitid, int control) +{ + if (!p) + return NULL; + + for (; 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) +{ + int len; + + if (!p || !p->name) + return 0; + + buflen--; + len = strscpy(buf, p->name, buflen); + return len < 0 ? buflen : len; +} + +/* 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->min_mute = p->dB->min_mute; + 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; + int len; + + if (!state->selector_map) + return 0; + for (p = state->selector_map; p->id; p++) { + if (p->id == unitid && index < p->count) { + len = strscpy(buf, p->names[index], buflen); + return len < 0 ? buflen : len; + } + } + 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 <= UAC3_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 snd_usb_audio *chip, + int index, char *buf, int maxlen) +{ + int len = usb_string(chip->dev, index, buf, maxlen - 1); + + if (len < 0) + return 0; + + 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 DIV_ROUND_UP(cval->max - cval->min, 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; +} + +static int uac2_ctl_value_size(int val_type) +{ + switch (val_type) { + case USB_MIXER_S32: + case USB_MIXER_U32: + return 4; + case USB_MIXER_S16: + case USB_MIXER_U16: + return 2; + default: + return 1; + } + return 0; /* unreachable */ +} + + +/* + * retrieve a mixer value + */ + +static inline int mixer_ctrl_intf(struct usb_mixer_interface *mixer) +{ + return get_iface_desc(mixer->hostif)->bInterfaceNumber; +} + +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_lock_shutdown(chip); + if (err < 0) + return -EIO; + + while (timeout-- > 0) { + idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); + err = 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); + if (err >= val_len) { + *value_ret = convert_signed_value(cval, snd_usb_combine_bytes(buf, val_len)); + err = 0; + goto out; + } else if (err == -ETIMEDOUT) { + 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: + snd_usb_unlock_shutdown(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; + /* enough space for one range */ + unsigned char buf[sizeof(__u16) + 3 * sizeof(__u32)]; + unsigned char *val; + int idx = 0, ret, val_size, size; + __u8 bRequest; + + val_size = uac2_ctl_value_size(cval->val_type); + + if (request == UAC_GET_CUR) { + bRequest = UAC2_CS_CUR; + size = val_size; + } else { + bRequest = UAC2_CS_RANGE; + size = sizeof(__u16) + 3 * val_size; + } + + memset(buf, 0, sizeof(buf)); + + if (snd_usb_lock_shutdown(chip)) + return -EIO; + + idx = mixer_ctrl_intf(cval->head.mixer) | (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); + snd_usb_unlock_shutdown(chip); + + if (ret < 0) { + usb_audio_dbg(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) + val_size; + break; + case UAC_GET_RES: + val = buf + sizeof(__u16) + val_size * 2; + break; + default: + return -EINVAL; + } + + *value_ret = convert_signed_value(cval, + snd_usb_combine_bytes(val, val_size)); + + 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[4]; + 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_2/3 */ + val_len = uac2_ctl_value_size(cval->val_type); + + /* 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; + buf[2] = (value_set >> 16) & 0xff; + buf[3] = (value_set >> 24) & 0xff; + + err = snd_usb_lock_shutdown(chip); + if (err < 0) + return -EIO; + + while (timeout-- > 0) { + idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); + err = 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); + if (err >= 0) { + err = 0; + goto out; + } else if (err == -ETIMEDOUT) { + 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: + snd_usb_unlock_shutdown(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; + if (cval->min_mute) + scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE; + 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_list(struct usb_mixer_elem_list *list, + struct snd_kcontrol *kctl, + bool is_std_info) +{ + struct usb_mixer_interface *mixer = list->mixer; + int err; + + while (snd_ctl_find_id(mixer->chip->card, &kctl->id)) + kctl->id.index++; + err = snd_ctl_add(mixer->chip->card, kctl); + if (err < 0) { + usb_audio_dbg(mixer->chip, "cannot add control (err = %d)\n", + err); + return err; + } + list->kctl = kctl; + list->is_std_info = is_std_info; + 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 snd_usb_audio *chip, struct usb_audio_term *iterm, + unsigned char *name, int maxlen, int term_only) +{ + struct iterm_name_combo *names; + int len; + + if (iterm->name) { + len = snd_usb_copy_string_desc(chip, iterm->name, + name, maxlen); + if (len) + return len; + } + + /* virtual type - not a real terminal */ + if (iterm->type >> 16) { + if (term_only) + return 0; + switch (iterm->type >> 16) { + case UAC3_SELECTOR_UNIT: + strcpy(name, "Selector"); + return 8; + case UAC3_PROCESSING_UNIT: + strcpy(name, "Process Unit"); + return 12; + case UAC3_EXTENSION_UNIT: + strcpy(name, "Ext Unit"); + return 8; + case UAC3_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; +} + +/* + * Get logical cluster information for UAC3 devices. + */ +static int get_cluster_channels_v3(struct mixer_build *state, unsigned int cluster_id) +{ + struct uac3_cluster_header_descriptor c_header; + int err; + + err = snd_usb_ctl_msg(state->chip->dev, + usb_rcvctrlpipe(state->chip->dev, 0), + UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + cluster_id, + snd_usb_ctrl_intf(state->chip), + &c_header, sizeof(c_header)); + if (err < 0) + goto error; + if (err != sizeof(c_header)) { + err = -EIO; + goto error; + } + + return c_header.bNrChannels; + +error: + usb_audio_err(state->chip, "cannot request logical cluster ID: %d (err: %d)\n", cluster_id, err); + return err; +} + +/* + * Get number of channels for a Mixer Unit. + */ +static int uac_mixer_unit_get_channels(struct mixer_build *state, + struct uac_mixer_unit_descriptor *desc) +{ + int mu_channels; + + switch (state->mixer->protocol) { + case UAC_VERSION_1: + case UAC_VERSION_2: + default: + if (desc->bLength < sizeof(*desc) + desc->bNrInPins + 1) + return 0; /* no bmControls -> skip */ + mu_channels = uac_mixer_unit_bNrChannels(desc); + break; + case UAC_VERSION_3: + mu_channels = get_cluster_channels_v3(state, + uac3_mixer_unit_wClusterDescrID(desc)); + break; + } + + return mu_channels; +} + +/* + * Parse Input Terminal Unit + */ +static int __check_input_term(struct mixer_build *state, int id, + struct usb_audio_term *term); + +static int parse_term_uac1_iterm_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + 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; + return 0; +} + +static int parse_term_uac2_iterm_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac2_input_terminal_descriptor *d = p1; + int err; + + /* call recursively to verify the referenced clock entity */ + err = __check_input_term(state, d->bCSourceID, term); + if (err < 0) + return err; + + /* save input term properties after recursion, + * to ensure they are not overriden by the recursion calls + */ + term->id = id; + term->type = le16_to_cpu(d->wTerminalType); + term->channels = d->bNrChannels; + term->chconfig = le32_to_cpu(d->bmChannelConfig); + term->name = d->iTerminal; + return 0; +} + +static int parse_term_uac3_iterm_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac3_input_terminal_descriptor *d = p1; + int err; + + /* call recursively to verify the referenced clock entity */ + err = __check_input_term(state, d->bCSourceID, term); + if (err < 0) + return err; + + /* save input term properties after recursion, + * to ensure they are not overriden by the recursion calls + */ + term->id = id; + term->type = le16_to_cpu(d->wTerminalType); + + err = get_cluster_channels_v3(state, le16_to_cpu(d->wClusterDescrID)); + if (err < 0) + return err; + term->channels = err; + + /* REVISIT: UAC3 IT doesn't have channels cfg */ + term->chconfig = 0; + + term->name = le16_to_cpu(d->wTerminalDescrStr); + return 0; +} + +static int parse_term_mixer_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac_mixer_unit_descriptor *d = p1; + int protocol = state->mixer->protocol; + int err; + + err = uac_mixer_unit_get_channels(state, d); + if (err <= 0) + return err; + + term->type = UAC3_MIXER_UNIT << 16; /* virtual type */ + term->channels = err; + if (protocol != UAC_VERSION_3) { + term->chconfig = uac_mixer_unit_wChannelConfig(d, protocol); + term->name = uac_mixer_unit_iMixer(d); + } + return 0; +} + +static int parse_term_selector_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac_selector_unit_descriptor *d = p1; + int err; + + /* call recursively to retrieve the channel info */ + err = __check_input_term(state, d->baSourceID[0], term); + if (err < 0) + return err; + term->type = UAC3_SELECTOR_UNIT << 16; /* virtual type */ + term->id = id; + if (state->mixer->protocol != UAC_VERSION_3) + term->name = uac_selector_unit_iSelector(d); + return 0; +} + +static int parse_term_proc_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id, int vtype) +{ + struct uac_processing_unit_descriptor *d = p1; + int protocol = state->mixer->protocol; + int err; + + if (d->bNrInPins) { + /* call recursively to retrieve the channel info */ + err = __check_input_term(state, d->baSourceID[0], term); + if (err < 0) + return err; + } + + term->type = vtype << 16; /* virtual type */ + term->id = id; + + if (protocol == UAC_VERSION_3) + return 0; + + if (!term->channels) { + term->channels = uac_processing_unit_bNrChannels(d); + term->chconfig = uac_processing_unit_wChannelConfig(d, protocol); + } + term->name = uac_processing_unit_iProcessing(d, protocol); + return 0; +} + +static int parse_term_effect_unit(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac2_effect_unit_descriptor *d = p1; + int err; + + err = __check_input_term(state, d->bSourceID, term); + if (err < 0) + return err; + term->type = UAC3_EFFECT_UNIT << 16; /* virtual type */ + term->id = id; + return 0; +} + +static int parse_term_uac2_clock_source(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac_clock_source_descriptor *d = p1; + + term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */ + term->id = id; + term->name = d->iClockSource; + return 0; +} + +static int parse_term_uac3_clock_source(struct mixer_build *state, + struct usb_audio_term *term, + void *p1, int id) +{ + struct uac3_clock_source_descriptor *d = p1; + + term->type = UAC3_CLOCK_SOURCE << 16; /* virtual type */ + term->id = id; + term->name = le16_to_cpu(d->wClockSourceStr); + return 0; +} + +#define PTYPE(a, b) ((a) << 8 | (b)) + +/* + * 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 protocol = state->mixer->protocol; + void *p1; + unsigned char *hdr; + + for (;;) { + /* a loop in the terminal chain? */ + if (test_and_set_bit(id, state->termbitmap)) + return -EINVAL; + + p1 = find_audio_control_unit(state, id); + if (!p1) + break; + if (!snd_usb_validate_audio_desc(p1, protocol)) + break; /* bad descriptor */ + + hdr = p1; + term->id = id; + + switch (PTYPE(protocol, hdr[2])) { + case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): { + /* the header is the same for all versions */ + struct uac_feature_unit_descriptor *d = p1; + + id = d->bSourceID; + break; /* continue to parse */ + } + case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL): + return parse_term_uac1_iterm_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL): + return parse_term_uac2_iterm_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL): + return parse_term_uac3_iterm_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT): + return parse_term_mixer_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR): + case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR): + return parse_term_selector_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT): + return parse_term_proc_unit(state, term, p1, id, + UAC3_PROCESSING_UNIT); + case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): + return parse_term_effect_unit(state, term, p1, id); + case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): + return parse_term_proc_unit(state, term, p1, id, + UAC3_EXTENSION_UNIT); + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE): + return parse_term_uac2_clock_source(state, term, p1, id); + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE): + return parse_term_uac3_clock_source(state, term, p1, id); + default: + return -ENODEV; + } + } + return -ENODEV; +} + + +static int check_input_term(struct mixer_build *state, int id, + struct usb_audio_term *term) +{ + memset(term, 0, sizeof(*term)); + memset(state->termbitmap, 0, sizeof(state->termbitmap)); + return __check_input_term(state, id, term); +} + +/* + * Feature Unit + */ + +/* feature unit control information */ +struct usb_feature_control_info { + int control; + const char *name; + int type; /* data type for uac1 */ + int type_uac2; /* data type for uac2 if different from uac1, else -1 */ +}; + +static const struct usb_feature_control_info audio_feature_info[] = { + { UAC_FU_MUTE, "Mute", USB_MIXER_INV_BOOLEAN, -1 }, + { UAC_FU_VOLUME, "Volume", USB_MIXER_S16, -1 }, + { UAC_FU_BASS, "Tone Control - Bass", USB_MIXER_S8, -1 }, + { UAC_FU_MID, "Tone Control - Mid", USB_MIXER_S8, -1 }, + { UAC_FU_TREBLE, "Tone Control - Treble", USB_MIXER_S8, -1 }, + { UAC_FU_GRAPHIC_EQUALIZER, "Graphic Equalizer", USB_MIXER_S8, -1 }, /* FIXME: not implemented yet */ + { UAC_FU_AUTOMATIC_GAIN, "Auto Gain Control", USB_MIXER_BOOLEAN, -1 }, + { UAC_FU_DELAY, "Delay Control", USB_MIXER_U16, USB_MIXER_U32 }, + { UAC_FU_BASS_BOOST, "Bass Boost", USB_MIXER_BOOLEAN, -1 }, + { UAC_FU_LOUDNESS, "Loudness", USB_MIXER_BOOLEAN, -1 }, + /* UAC2 specific */ + { UAC2_FU_INPUT_GAIN, "Input Gain Control", USB_MIXER_S16, -1 }, + { UAC2_FU_INPUT_GAIN_PAD, "Input Gain Pad Control", USB_MIXER_S16, -1 }, + { UAC2_FU_PHASE_INVERTER, "Phase Inverter Control", USB_MIXER_BOOLEAN, -1 }, +}; + +static void usb_mixer_elem_info_free(struct usb_mixer_elem_info *cval) +{ + kfree(cval); +} + +/* private_free callback */ +void snd_usb_mixer_elem_free(struct snd_kcontrol *kctl) +{ + usb_mixer_elem_info_free(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(0x0d8c, 0x0103): + if (!strcmp(kctl->id.name, "PCM Playback Volume")) { + usb_audio_info(chip, + "set volume quirk for CM102-A+/102S+\n"); + cval->min = -256; + } + 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): + case USB_ID(0x046d, 0x09a2): /* QuickCam Communicate Deluxe/S7500 */ + /* Most audio usb devices lie about volume resolution. + * Most Logitech webcams have res = 384. + * Probably 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; + case USB_ID(0x0495, 0x3042): /* ESS Technology Asus USB DAC */ + if ((strstr(kctl->id.name, "Playback Volume") != NULL) || + strstr(kctl->id.name, "Capture Volume") != NULL) { + cval->min >>= 8; + cval->max = 0; + cval->res = 1; + } + break; + case USB_ID(0x1224, 0x2a25): /* Jieli Technology USB PHY 2.0 */ + if (!strcmp(kctl->id.name, "Mic Capture Volume")) { + usb_audio_info(chip, + "set resolution quirk: cval->res = 16\n"); + cval->res = 16; + } + break; + case USB_ID(0x1bcf, 0x2283): /* NexiGo N930AF FHD Webcam */ + if (!strcmp(kctl->id.name, "Mic Capture Volume")) { + usb_audio_info(chip, + "set resolution quirk: cval->res = 16\n"); + cval->res = 16; + } + break; + } +} + +/* forcibly initialize the current mixer value; if GET_CUR fails, set to + * the minimum as default + */ +static void init_cur_mix_raw(struct usb_mixer_elem_info *cval, int ch, int idx) +{ + int val, err; + + err = snd_usb_get_cur_mix_value(cval, ch, idx, &val); + if (!err) + return; + if (!cval->head.mixer->ignore_ctl_error) + usb_audio_warn(cval->head.mixer->chip, + "%d:%d: failed to get current value for ch %d (%d)\n", + cval->head.id, mixer_ctrl_intf(cval->head.mixer), + ch, err); + snd_usb_set_cur_mix_value(cval, ch, idx, cval->min); +} + +/* + * 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) +{ + int i, idx; + + /* 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) { + 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, mixer_ctrl_intf(cval->head.mixer), + 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 if (cval->head.mixer->protocol == UAC_VERSION_1) { + 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; + if (get_cur_mix_raw(cval, minchn, &saved) < 0) + goto no_res_check; + 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); + } + +no_res_check: + 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; + } + } else { + /* if the max volume is too low, it's likely a bogus range; + * here we use -96dB as the threshold + */ + if (cval->dBmax <= -9600) { + usb_audio_info(cval->head.mixer->chip, + "%d:%d: bogus dB values (%d/%d), disabling dB reporting\n", + cval->head.id, mixer_ctrl_intf(cval->head.mixer), + cval->dBmin, cval->dBmax); + cval->dBmin = cval->dBmax = 0; + } + } + + /* initialize all elements */ + if (!cval->cmask) { + init_cur_mix_raw(cval, 0, 0); + } else { + idx = 0; + for (i = 0; i < MAX_CHANNELS; i++) { + if (cval->cmask & (1 << i)) { + init_cur_mix_raw(cval, i + 1, idx); + idx++; + } + } + } + + 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 = + DIV_ROUND_UP(cval->max - cval->min, 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; +} + +/* get the boolean value from the master channel of a UAC control */ +static int mixer_ctl_master_bool_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *cval = kcontrol->private_data; + int val, err; + + err = snd_usb_get_cur_mix_value(cval, 0, 0, &val); + if (err < 0) + return filter_error(cval, err); + val = (val != 0); + ucontrol->value.integer.value[0] = val; + return 0; +} + +static int get_connector_value(struct usb_mixer_elem_info *cval, + char *name, int *val) +{ + struct snd_usb_audio *chip = cval->head.mixer->chip; + int idx = 0, validx, ret; + + validx = cval->control << 8 | 0; + + ret = snd_usb_lock_shutdown(chip) ? -EIO : 0; + if (ret) + goto error; + + idx = mixer_ctrl_intf(cval->head.mixer) | (cval->head.id << 8); + if (cval->head.mixer->protocol == UAC_VERSION_2) { + struct uac2_connectors_ctl_blk uac2_conn; + + ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + validx, idx, &uac2_conn, sizeof(uac2_conn)); + if (val) + *val = !!uac2_conn.bNrChannels; + } else { /* UAC_VERSION_3 */ + struct uac3_insertion_ctl_blk uac3_conn; + + ret = snd_usb_ctl_msg(chip->dev, usb_rcvctrlpipe(chip->dev, 0), UAC2_CS_CUR, + USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN, + validx, idx, &uac3_conn, sizeof(uac3_conn)); + if (val) + *val = !!uac3_conn.bmConInserted; + } + + snd_usb_unlock_shutdown(chip); + + if (ret < 0) { + if (name && strstr(name, "Speaker")) { + if (val) + *val = 1; + return 0; + } +error: + usb_audio_err(chip, + "cannot get connectors status: req = %#x, wValue = %#x, wIndex = %#x, type = %d\n", + UAC_GET_CUR, validx, idx, cval->val_type); + + if (val) + *val = 0; + + return filter_error(cval, ret); + } + + return ret; +} + +/* get the connectors status and report it as boolean type */ +static int mixer_ctl_connector_get(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct usb_mixer_elem_info *cval = kcontrol->private_data; + int ret, val; + + ret = get_connector_value(cval, kcontrol->id.name, &val); + + if (ret < 0) + return ret; + + ucontrol->value.integer.value[0] = val; + return 0; +} + +static const 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 const 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, +}; + +/* + * A control which shows the boolean value from reading a UAC control on + * the master channel. + */ +static const struct snd_kcontrol_new usb_bool_master_control_ctl_ro = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .name = "", /* will be filled later manually */ + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ctl_boolean_mono_info, + .get = mixer_ctl_master_bool_get, + .put = NULL, +}; + +static const struct snd_kcontrol_new usb_connector_ctl_ro = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .name = "", /* will be filled later manually */ + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .info = snd_ctl_boolean_mono_info, + .get = mixer_ctl_connector_get, + .put = NULL, +}; + +/* + * This symbol is exported in order to allow the mixer quirks to + * hook up to the standard feature unit control mechanism + */ +const 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) +{ + static const char * const names_to_check[] = { + "Headset", "headset", "Headphone", "headphone", NULL}; + const char * const *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; + + snd_ctl_rename(card, kctl, "Headphone"); +} + +static const struct usb_feature_control_info *get_feature_control_info(int control) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(audio_feature_info); ++i) { + if (audio_feature_info[i].control == control) + return &audio_feature_info[i]; + } + return NULL; +} + +static void __build_feature_ctl(struct usb_mixer_interface *mixer, + const struct usbmix_name_map *imap, + unsigned int ctl_mask, int control, + struct usb_audio_term *iterm, + struct usb_audio_term *oterm, + int unitid, int nameid, int readonly_mask) +{ + const struct usb_feature_control_info *ctl_info; + unsigned int len = 0; + int mapped_name = 0; + struct snd_kcontrol *kctl; + struct usb_mixer_elem_info *cval; + const struct usbmix_name_map *map; + unsigned int range; + + if (control == UAC_FU_GRAPHIC_EQUALIZER) { + /* FIXME: not supported yet */ + return; + } + + map = find_map(imap, 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, mixer, unitid); + cval->control = control; + cval->cmask = ctl_mask; + + ctl_info = get_feature_control_info(control); + if (!ctl_info) { + usb_mixer_elem_info_free(cval); + return; + } + if (mixer->protocol == UAC_VERSION_1) + cval->val_type = ctl_info->type; + else /* UAC_VERSION_2 */ + cval->val_type = ctl_info->type_uac2 >= 0 ? + ctl_info->type_uac2 : ctl_info->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(mixer->chip, "cannot malloc kcontrol\n"); + usb_mixer_elem_info_free(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(mixer->chip, 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) { + if (iterm) + len = get_term_name(mixer->chip, iterm, + kctl->id.name, + sizeof(kctl->id.name), 1); + if (!len && oterm) + len = get_term_name(mixer->chip, 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, 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 && oterm && !(oterm->type >> 16)) { + if ((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) + strscpy(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); + + /* skip a bogus volume range */ + if (cval->max <= cval->min) { + usb_audio_dbg(mixer->chip, + "[%d] FU [%s] skipped due to invalid volume\n", + cval->head.id, kctl->id.name); + snd_ctl_free_one(kctl); + return; + } + + + 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; + } + } + + snd_usb_mixer_fu_apply_quirk(mixer, cval, unitid, kctl); + + 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(mixer->chip, + "Warning! Unlikely big volume range (=%u), cval->res is probably wrong.", + range); + usb_audio_warn(mixer->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(mixer->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); +} + +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; + int nameid = uac_feature_unit_iFeature(desc); + + __build_feature_ctl(state->mixer, state->map, ctl_mask, control, + iterm, &state->oterm, unitid, nameid, readonly_mask); +} + +static void build_feature_ctl_badd(struct usb_mixer_interface *mixer, + unsigned int ctl_mask, int control, int unitid, + const struct usbmix_name_map *badd_map) +{ + __build_feature_ctl(mixer, badd_map, ctl_mask, control, + NULL, NULL, unitid, 0, 0); +} + +static void get_connector_control_name(struct usb_mixer_interface *mixer, + struct usb_audio_term *term, + bool is_input, char *name, int name_size) +{ + int name_len = get_term_name(mixer->chip, term, name, name_size, 0); + + if (name_len == 0) + strscpy(name, "Unknown", name_size); + + /* + * sound/core/ctljack.c has a convention of naming jack controls + * by ending in " Jack". Make it slightly more useful by + * indicating Input or Output after the terminal name. + */ + if (is_input) + strlcat(name, " - Input Jack", name_size); + else + strlcat(name, " - Output Jack", name_size); +} + +/* get connector value to "wake up" the USB audio */ +static int connector_mixer_resume(struct usb_mixer_elem_list *list) +{ + struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list); + + get_connector_value(cval, NULL, NULL); + return 0; +} + +/* Build a mixer control for a UAC connector control (jack-detect) */ +static void build_connector_control(struct usb_mixer_interface *mixer, + const struct usbmix_name_map *imap, + struct usb_audio_term *term, bool is_input) +{ + struct snd_kcontrol *kctl; + struct usb_mixer_elem_info *cval; + const struct usbmix_name_map *map; + + map = find_map(imap, term->id, 0); + if (check_ignored_ctl(map)) + return; + + cval = kzalloc(sizeof(*cval), GFP_KERNEL); + if (!cval) + return; + snd_usb_mixer_elem_init_std(&cval->head, mixer, term->id); + + /* set up a specific resume callback */ + cval->head.resume = connector_mixer_resume; + + /* + * UAC2: The first byte from reading the UAC2_TE_CONNECTOR control returns the + * number of channels connected. + * + * UAC3: The first byte specifies size of bitmap for the inserted controls. The + * following byte(s) specifies which connectors are inserted. + * + * This boolean ctl will simply report if any channels are connected + * or not. + */ + if (mixer->protocol == UAC_VERSION_2) + cval->control = UAC2_TE_CONNECTOR; + else /* UAC_VERSION_3 */ + cval->control = UAC3_TE_INSERTION; + + cval->val_type = USB_MIXER_BOOLEAN; + cval->channels = 1; /* report true if any channel is connected */ + cval->min = 0; + cval->max = 1; + kctl = snd_ctl_new1(&usb_connector_ctl_ro, cval); + if (!kctl) { + usb_audio_err(mixer->chip, "cannot malloc kcontrol\n"); + usb_mixer_elem_info_free(cval); + return; + } + + if (check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name))) + strlcat(kctl->id.name, " Jack", sizeof(kctl->id.name)); + else + get_connector_control_name(mixer, term, is_input, kctl->id.name, + sizeof(kctl->id.name)); + kctl->private_free = snd_usb_mixer_elem_free; + snd_usb_mixer_add_control(&cval->head, kctl); +} + +static int parse_clock_source_unit(struct mixer_build *state, int unitid, + void *_ftr) +{ + struct uac_clock_source_descriptor *hdr = _ftr; + struct usb_mixer_elem_info *cval; + struct snd_kcontrol *kctl; + char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN]; + int ret; + + if (state->mixer->protocol != UAC_VERSION_2) + return -EINVAL; + + /* + * The only property of this unit we are interested in is the + * clock source validity. If that isn't readable, just bail out. + */ + if (!uac_v2v3_control_is_readable(hdr->bmControls, + UAC2_CS_CONTROL_CLOCK_VALID)) + return 0; + + cval = kzalloc(sizeof(*cval), GFP_KERNEL); + if (!cval) + return -ENOMEM; + + snd_usb_mixer_elem_init_std(&cval->head, state->mixer, hdr->bClockID); + + cval->min = 0; + cval->max = 1; + cval->channels = 1; + cval->val_type = USB_MIXER_BOOLEAN; + cval->control = UAC2_CS_CONTROL_CLOCK_VALID; + + cval->master_readonly = 1; + /* From UAC2 5.2.5.1.2 "Only the get request is supported." */ + kctl = snd_ctl_new1(&usb_bool_master_control_ctl_ro, cval); + + if (!kctl) { + usb_mixer_elem_info_free(cval); + return -ENOMEM; + } + + kctl->private_free = snd_usb_mixer_elem_free; + ret = snd_usb_copy_string_desc(state->chip, hdr->iClockSource, + name, sizeof(name)); + if (ret > 0) + snprintf(kctl->id.name, sizeof(kctl->id.name), + "%s Validity", name); + else + snprintf(kctl->id.name, sizeof(kctl->id.name), + "Clock Source %d Validity", hdr->bClockID); + + return 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; + int err, csize; + struct uac_feature_unit_descriptor *hdr = _ftr; + __u8 *bmaControls; + + if (state->mixer->protocol == UAC_VERSION_1) { + csize = hdr->bControlSize; + channels = (hdr->bLength - 7) / csize - 1; + bmaControls = hdr->bmaControls; + } else if (state->mixer->protocol == UAC_VERSION_2) { + struct uac2_feature_unit_descriptor *ftr = _ftr; + csize = 4; + channels = (hdr->bLength - 6) / 4 - 1; + bmaControls = ftr->bmaControls; + } else { /* UAC_VERSION_3 */ + struct uac3_feature_unit_descriptor *ftr = _ftr; + + csize = 4; + channels = (ftr->bLength - 7) / 4 - 1; + bmaControls = ftr->bmaControls; + } + + /* parse the source unit */ + err = parse_audio_unit(state, hdr->bSourceID); + if (err < 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 (state->mixer->protocol == UAC_VERSION_1) { + /* check all control types */ + for (i = 0; i < 10; i++) { + unsigned int ch_bits = 0; + int control = audio_feature_info[i].control; + + 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, control, + &iterm, unitid, 0); + if (master_bits & (1 << i)) + build_feature_ctl(state, _ftr, 0, control, + &iterm, unitid, 0); + } + } else { /* UAC_VERSION_2/3 */ + for (i = 0; i < ARRAY_SIZE(audio_feature_info); i++) { + unsigned int ch_bits = 0; + unsigned int ch_read_only = 0; + int control = audio_feature_info[i].control; + + for (j = 0; j < channels; j++) { + unsigned int mask; + + mask = snd_usb_combine_bytes(bmaControls + + csize * (j+1), csize); + if (uac_v2v3_control_is_readable(mask, control)) { + ch_bits |= (1 << j); + if (!uac_v2v3_control_is_writeable(mask, control)) + 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, control, + &iterm, unitid, ch_read_only); + if (uac_v2v3_control_is_readable(master_bits, control)) + build_feature_ctl(state, _ftr, 0, control, + &iterm, unitid, + !uac_v2v3_control_is_writeable(master_bits, + control)); + } + } + + return 0; +} + +/* + * Mixer Unit + */ + +/* check whether the given in/out overflows bmMixerControls matrix */ +static bool mixer_bitmap_overflow(struct uac_mixer_unit_descriptor *desc, + int protocol, int num_ins, int num_outs) +{ + u8 *hdr = (u8 *)desc; + u8 *c = uac_mixer_unit_bmControls(desc, protocol); + size_t rest; /* remaining bytes after bmMixerControls */ + + switch (protocol) { + case UAC_VERSION_1: + default: + rest = 1; /* iMixer */ + break; + case UAC_VERSION_2: + rest = 2; /* bmControls + iMixer */ + break; + case UAC_VERSION_3: + rest = 6; /* bmControls + wMixerDescrStr */ + break; + } + + /* overflow? */ + return c + (num_ins * num_outs + 7) / 8 + rest > hdr + hdr[0]; +} + +/* + * 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 num_outs, + int unitid, struct usb_audio_term *iterm) +{ + struct usb_mixer_elem_info *cval; + unsigned int i, len; + struct snd_kcontrol *kctl; + const struct usbmix_name_map *map; + + map = find_map(state->map, 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"); + usb_mixer_elem_info_free(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->chip, 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); +} + +static int parse_audio_input_terminal(struct mixer_build *state, int unitid, + void *raw_desc) +{ + struct usb_audio_term iterm; + unsigned int control, bmctls, term_id; + + if (state->mixer->protocol == UAC_VERSION_2) { + struct uac2_input_terminal_descriptor *d_v2 = raw_desc; + control = UAC2_TE_CONNECTOR; + term_id = d_v2->bTerminalID; + bmctls = le16_to_cpu(d_v2->bmControls); + } else if (state->mixer->protocol == UAC_VERSION_3) { + struct uac3_input_terminal_descriptor *d_v3 = raw_desc; + control = UAC3_TE_INSERTION; + term_id = d_v3->bTerminalID; + bmctls = le32_to_cpu(d_v3->bmControls); + } else { + return 0; /* UAC1. No Insertion control */ + } + + check_input_term(state, term_id, &iterm); + + /* Check for jack detection. */ + if ((iterm.type & 0xff00) != 0x0100 && + uac_v2v3_control_is_readable(bmctls, control)) + build_connector_control(state->mixer, state->map, &iterm, true); + + return 0; +} + +/* + * 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; + + err = uac_mixer_unit_get_channels(state, desc); + if (err < 0) { + usb_audio_err(state->chip, + "invalid MIXER UNIT descriptor %d\n", + unitid); + return err; + } + + num_outs = err; + input_pins = desc->bNrInPins; + + 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 (!num_outs) + continue; + err = check_input_term(state, desc->baSourceID[pin], &iterm); + if (err < 0) + return err; + num_ins += iterm.channels; + if (mixer_bitmap_overflow(desc, state->mixer->protocol, + num_ins, num_outs)) + break; + 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, num_outs, + 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 const 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; + const char *suffix; + int val_type; + int min_value; +}; + +struct procunit_info { + int type; + char *name; + const struct procunit_value_info *values; +}; + +static const struct procunit_value_info undefined_proc_info[] = { + { 0x00, "Control Undefined", 0 }, + { 0 } +}; + +static const 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 const 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 const struct procunit_value_info threed_enh_proc_info[] = { + { UAC_3D_ENABLE, "Switch", USB_MIXER_BOOLEAN }, + { UAC_3D_SPACE, "Spaciousness", USB_MIXER_U8 }, + { 0 } +}; +static const 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 const 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 const 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 const 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 }, +}; + +static const struct procunit_value_info uac3_updown_proc_info[] = { + { UAC3_UD_MODE_SELECT, "Mode Select", USB_MIXER_U8, 1 }, + { 0 } +}; +static const struct procunit_value_info uac3_stereo_ext_proc_info[] = { + { UAC3_EXT_WIDTH_CONTROL, "Width Control", USB_MIXER_U8 }, + { 0 } +}; + +static const struct procunit_info uac3_procunits[] = { + { UAC3_PROCESS_UP_DOWNMIX, "Up Down", uac3_updown_proc_info }, + { UAC3_PROCESS_STEREO_EXTENDER, "3D Stereo Extender", uac3_stereo_ext_proc_info }, + { UAC3_PROCESS_MULTI_FUNCTION, "Multi-Function", undefined_proc_info }, + { 0 }, +}; + +/* + * predefined data for extension units + */ +static const struct procunit_value_info clock_rate_xu_info[] = { + { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, + { 0 } +}; +static const struct procunit_value_info clock_source_xu_info[] = { + { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, + { 0 } +}; +static const struct procunit_value_info spdif_format_xu_info[] = { + { USB_XU_DIGITAL_FORMAT_SELECTOR, "SPDIF/AC3", USB_MIXER_BOOLEAN }, + { 0 } +}; +static const struct procunit_value_info soft_limit_xu_info[] = { + { USB_XU_SOFT_LIMIT_SELECTOR, " ", USB_MIXER_BOOLEAN }, + { 0 } +}; +static const 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, const struct procunit_info *list, + bool extension_unit) +{ + struct uac_processing_unit_descriptor *desc = raw_desc; + int num_ins; + struct usb_mixer_elem_info *cval; + struct snd_kcontrol *kctl; + int i, err, nameid, type, len, val; + const struct procunit_info *info; + const struct procunit_value_info *valinfo; + const struct usbmix_name_map *map; + static const struct procunit_value_info default_value_info[] = { + { 0x01, "Switch", USB_MIXER_BOOLEAN }, + { 0 } + }; + static const struct procunit_info default_info = { + 0, NULL, default_value_info + }; + const char *name = extension_unit ? + "Extension Unit" : "Processing Unit"; + + num_ins = desc->bNrInPins; + for (i = 0; i < num_ins; i++) { + err = parse_audio_unit(state, desc->baSourceID[i]); + if (err < 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 (state->mixer->protocol == UAC_VERSION_1) { + if (!(controls[valinfo->control / 8] & + (1 << ((valinfo->control % 8) - 1)))) + continue; + } else { /* UAC_VERSION_2/3 */ + if (!uac_v2v3_control_is_readable(controls[valinfo->control / 8], + valinfo->control)) + continue; + } + + map = find_map(state->map, 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; + + if (state->mixer->protocol > UAC_VERSION_1 && + !uac_v2v3_control_is_writeable(controls[valinfo->control / 8], + valinfo->control)) + cval->master_readonly = 1; + + /* get min/max values */ + switch (type) { + case UAC_PROCESS_UP_DOWNMIX: { + bool mode_sel = false; + + switch (state->mixer->protocol) { + case UAC_VERSION_1: + case UAC_VERSION_2: + default: + if (cval->control == UAC_UD_MODE_SELECT) + mode_sel = true; + break; + case UAC_VERSION_3: + if (cval->control == UAC3_UD_MODE_SELECT) + mode_sel = true; + break; + } + + if (mode_sel) { + __u8 *control_spec = uac_processing_unit_specific(desc, + state->mixer->protocol); + cval->min = 1; + cval->max = control_spec[0]; + cval->res = 1; + cval->initialized = 1; + break; + } + + get_min_max(cval, valinfo->min_value); + break; + } + case 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; + break; + default: + get_min_max(cval, valinfo->min_value); + break; + } + + err = get_cur_ctl_value(cval, cval->control << 8, &val); + if (err < 0) { + usb_mixer_elem_info_free(cval); + return -EINVAL; + } + + kctl = snd_ctl_new1(&mixer_procunit_ctl, cval); + if (!kctl) { + usb_mixer_elem_info_free(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) { + strscpy(kctl->id.name, info->name, sizeof(kctl->id.name)); + } else { + if (extension_unit) + nameid = uac_extension_unit_iExtension(desc, state->mixer->protocol); + else + nameid = uac_processing_unit_iProcessing(desc, state->mixer->protocol); + len = 0; + if (nameid) + len = snd_usb_copy_string_desc(state->chip, + nameid, + kctl->id.name, + sizeof(kctl->id.name)); + if (!len) + strscpy(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) +{ + switch (state->mixer->protocol) { + case UAC_VERSION_1: + case UAC_VERSION_2: + default: + return build_audio_procunit(state, unitid, raw_desc, + procunits, false); + case UAC_VERSION_3: + return build_audio_procunit(state, unitid, raw_desc, + uac3_procunits, false); + } +} + +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, true); +} + +/* + * 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 const 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; + usb_mixer_elem_info_free(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; + + for (i = 0; i < desc->bNrInPins; i++) { + err = parse_audio_unit(state, desc->baSourceID[i]); + if (err < 0) + return err; + } + + if (desc->bNrInPins == 1) /* only one ? nonsense! */ + return 0; + + map = find_map(state->map, 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; + + switch (state->mixer->protocol) { + case UAC_VERSION_1: + default: + cval->control = 0; + break; + case UAC_VERSION_2: + case UAC_VERSION_3: + if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR || + desc->bDescriptorSubtype == UAC3_CLOCK_SELECTOR) + cval->control = UAC2_CX_CLOCK_SELECTOR; + else /* UAC2/3_SELECTOR_UNIT */ + cval->control = UAC2_SU_SELECTOR; + break; + } + + namelist = kcalloc(desc->bNrInPins, sizeof(char *), GFP_KERNEL); + if (!namelist) { + err = -ENOMEM; + goto error_cval; + } +#define MAX_ITEM_NAME_LEN 64 + for (i = 0; i < desc->bNrInPins; i++) { + struct usb_audio_term iterm; + namelist[i] = kmalloc(MAX_ITEM_NAME_LEN, GFP_KERNEL); + if (!namelist[i]) { + err = -ENOMEM; + goto error_name; + } + 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->chip, &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"); + err = -ENOMEM; + goto error_name; + } + kctl->private_value = (unsigned long)namelist; + kctl->private_free = usb_mixer_selector_elem_free; + + /* check the static mapping table at first */ + len = check_mapped_name(map, kctl->id.name, sizeof(kctl->id.name)); + if (!len) { + /* no mapping ? */ + switch (state->mixer->protocol) { + case UAC_VERSION_1: + case UAC_VERSION_2: + default: + /* if iSelector is given, use it */ + nameid = uac_selector_unit_iSelector(desc); + if (nameid) + len = snd_usb_copy_string_desc(state->chip, + nameid, kctl->id.name, + sizeof(kctl->id.name)); + break; + case UAC_VERSION_3: + /* TODO: Class-Specific strings not yet supported */ + break; + } + + /* ... or pick up the terminal name at next */ + if (!len) + len = get_term_name(state->chip, &state->oterm, + kctl->id.name, sizeof(kctl->id.name), 0); + /* ... or use the fixed string "USB" as the last resort */ + if (!len) + strscpy(kctl->id.name, "USB", sizeof(kctl->id.name)); + + /* and add the proper suffix */ + if (desc->bDescriptorSubtype == UAC2_CLOCK_SELECTOR || + desc->bDescriptorSubtype == UAC3_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); + + error_name: + for (i = 0; i < desc->bNrInPins; i++) + kfree(namelist[i]); + kfree(namelist); + error_cval: + usb_mixer_elem_info_free(cval); + return err; +} + +/* + * parse an audio unit recursively + */ + +static int parse_audio_unit(struct mixer_build *state, int unitid) +{ + unsigned char *p1; + int protocol = state->mixer->protocol; + + 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; + } + + if (!snd_usb_validate_audio_desc(p1, protocol)) { + usb_audio_dbg(state->chip, "invalid unit %d\n", unitid); + return 0; /* skip invalid unit */ + } + + switch (PTYPE(protocol, p1[2])) { + case PTYPE(UAC_VERSION_1, UAC_INPUT_TERMINAL): + case PTYPE(UAC_VERSION_2, UAC_INPUT_TERMINAL): + case PTYPE(UAC_VERSION_3, UAC_INPUT_TERMINAL): + return parse_audio_input_terminal(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_2, UAC_MIXER_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_MIXER_UNIT): + return parse_audio_mixer_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SOURCE): + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SOURCE): + return parse_clock_source_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_SELECTOR_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_CLOCK_SELECTOR): + case PTYPE(UAC_VERSION_3, UAC3_CLOCK_SELECTOR): + return parse_audio_selector_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_2, UAC_FEATURE_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_FEATURE_UNIT): + return parse_audio_feature_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC1_PROCESSING_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_PROCESSING_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_PROCESSING_UNIT): + return parse_audio_processing_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_1, UAC1_EXTENSION_UNIT): + case PTYPE(UAC_VERSION_2, UAC2_EXTENSION_UNIT_V2): + case PTYPE(UAC_VERSION_3, UAC3_EXTENSION_UNIT): + return parse_audio_extension_unit(state, unitid, p1); + case PTYPE(UAC_VERSION_2, UAC2_EFFECT_UNIT): + case PTYPE(UAC_VERSION_3, UAC3_EFFECT_UNIT): + return 0; /* FIXME - effect units not implemented yet */ + 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) +{ + /* kill pending URBs */ + snd_usb_mixer_disconnect(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; +} + +/* UAC3 predefined channels configuration */ +struct uac3_badd_profile { + int subclass; + const char *name; + int c_chmask; /* capture channels mask */ + int p_chmask; /* playback channels mask */ + int st_chmask; /* side tone mixing channel mask */ +}; + +static const struct uac3_badd_profile uac3_badd_profiles[] = { + { + /* + * BAIF, BAOF or combination of both + * IN: Mono or Stereo cfg, Mono alt possible + * OUT: Mono or Stereo cfg, Mono alt possible + */ + .subclass = UAC3_FUNCTION_SUBCLASS_GENERIC_IO, + .name = "GENERIC IO", + .c_chmask = -1, /* dynamic channels */ + .p_chmask = -1, /* dynamic channels */ + }, + { + /* BAOF; Stereo only cfg, Mono alt possible */ + .subclass = UAC3_FUNCTION_SUBCLASS_HEADPHONE, + .name = "HEADPHONE", + .p_chmask = 3, + }, + { + /* BAOF; Mono or Stereo cfg, Mono alt possible */ + .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKER, + .name = "SPEAKER", + .p_chmask = -1, /* dynamic channels */ + }, + { + /* BAIF; Mono or Stereo cfg, Mono alt possible */ + .subclass = UAC3_FUNCTION_SUBCLASS_MICROPHONE, + .name = "MICROPHONE", + .c_chmask = -1, /* dynamic channels */ + }, + { + /* + * BAIOF topology + * IN: Mono only + * OUT: Mono or Stereo cfg, Mono alt possible + */ + .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET, + .name = "HEADSET", + .c_chmask = 1, + .p_chmask = -1, /* dynamic channels */ + .st_chmask = 1, + }, + { + /* BAIOF; IN: Mono only; OUT: Stereo only, Mono alt possible */ + .subclass = UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER, + .name = "HEADSET ADAPTER", + .c_chmask = 1, + .p_chmask = 3, + .st_chmask = 1, + }, + { + /* BAIF + BAOF; IN: Mono only; OUT: Mono only */ + .subclass = UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE, + .name = "SPEAKERPHONE", + .c_chmask = 1, + .p_chmask = 1, + }, + { 0 } /* terminator */ +}; + +static bool uac3_badd_func_has_valid_channels(struct usb_mixer_interface *mixer, + const struct uac3_badd_profile *f, + int c_chmask, int p_chmask) +{ + /* + * If both playback/capture channels are dynamic, make sure + * at least one channel is present + */ + if (f->c_chmask < 0 && f->p_chmask < 0) { + if (!c_chmask && !p_chmask) { + usb_audio_warn(mixer->chip, "BAAD %s: no channels?", + f->name); + return false; + } + return true; + } + + if ((f->c_chmask < 0 && !c_chmask) || + (f->c_chmask >= 0 && f->c_chmask != c_chmask)) { + usb_audio_warn(mixer->chip, "BAAD %s c_chmask mismatch", + f->name); + return false; + } + if ((f->p_chmask < 0 && !p_chmask) || + (f->p_chmask >= 0 && f->p_chmask != p_chmask)) { + usb_audio_warn(mixer->chip, "BAAD %s p_chmask mismatch", + f->name); + return false; + } + return true; +} + +/* + * create mixer controls for UAC3 BADD profiles + * + * UAC3 BADD device doesn't contain CS descriptors thus we will guess everything + * + * BADD device may contain Mixer Unit, which doesn't have any controls, skip it + */ +static int snd_usb_mixer_controls_badd(struct usb_mixer_interface *mixer, + int ctrlif) +{ + struct usb_device *dev = mixer->chip->dev; + struct usb_interface_assoc_descriptor *assoc; + int badd_profile = mixer->chip->badd_profile; + const struct uac3_badd_profile *f; + const struct usbmix_ctl_map *map; + int p_chmask = 0, c_chmask = 0, st_chmask = 0; + int i; + + assoc = usb_ifnum_to_if(dev, ctrlif)->intf_assoc; + + /* Detect BADD capture/playback channels from AS EP descriptors */ + for (i = 0; i < assoc->bInterfaceCount; i++) { + int intf = assoc->bFirstInterface + i; + + struct usb_interface *iface; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + unsigned int maxpacksize; + char dir_in; + int chmask, num; + + if (intf == ctrlif) + continue; + + iface = usb_ifnum_to_if(dev, intf); + if (!iface) + continue; + + num = iface->num_altsetting; + + if (num < 2) + return -EINVAL; + + /* + * The number of Channels in an AudioStreaming interface + * and the audio sample bit resolution (16 bits or 24 + * bits) can be derived from the wMaxPacketSize field in + * the Standard AS Audio Data Endpoint descriptor in + * Alternate Setting 1 + */ + alts = &iface->altsetting[1]; + altsd = get_iface_desc(alts); + + if (altsd->bNumEndpoints < 1) + return -EINVAL; + + /* check direction */ + dir_in = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); + maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); + + switch (maxpacksize) { + default: + usb_audio_err(mixer->chip, + "incorrect wMaxPacketSize 0x%x for BADD profile\n", + maxpacksize); + return -EINVAL; + case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: + case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: + chmask = 1; + break; + case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: + case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: + chmask = 3; + break; + } + + if (dir_in) + c_chmask = chmask; + else + p_chmask = chmask; + } + + usb_audio_dbg(mixer->chip, + "UAC3 BADD profile 0x%x: detected c_chmask=%d p_chmask=%d\n", + badd_profile, c_chmask, p_chmask); + + /* check the mapping table */ + for (map = uac3_badd_usbmix_ctl_maps; map->id; map++) { + if (map->id == badd_profile) + break; + } + + if (!map->id) + return -EINVAL; + + for (f = uac3_badd_profiles; f->name; f++) { + if (badd_profile == f->subclass) + break; + } + if (!f->name) + return -EINVAL; + if (!uac3_badd_func_has_valid_channels(mixer, f, c_chmask, p_chmask)) + return -EINVAL; + st_chmask = f->st_chmask; + + /* Playback */ + if (p_chmask) { + /* Master channel, always writable */ + build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, + UAC3_BADD_FU_ID2, map->map); + /* Mono/Stereo volume channels, always writable */ + build_feature_ctl_badd(mixer, p_chmask, UAC_FU_VOLUME, + UAC3_BADD_FU_ID2, map->map); + } + + /* Capture */ + if (c_chmask) { + /* Master channel, always writable */ + build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, + UAC3_BADD_FU_ID5, map->map); + /* Mono/Stereo volume channels, always writable */ + build_feature_ctl_badd(mixer, c_chmask, UAC_FU_VOLUME, + UAC3_BADD_FU_ID5, map->map); + } + + /* Side tone-mixing */ + if (st_chmask) { + /* Master channel, always writable */ + build_feature_ctl_badd(mixer, 0, UAC_FU_MUTE, + UAC3_BADD_FU_ID7, map->map); + /* Mono volume channel, always writable */ + build_feature_ctl_badd(mixer, 1, UAC_FU_VOLUME, + UAC3_BADD_FU_ID7, map->map); + } + + /* Insertion Control */ + if (f->subclass == UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER) { + struct usb_audio_term iterm, oterm; + + /* Input Term - Insertion control */ + memset(&iterm, 0, sizeof(iterm)); + iterm.id = UAC3_BADD_IT_ID4; + iterm.type = UAC_BIDIR_TERMINAL_HEADSET; + build_connector_control(mixer, map->map, &iterm, true); + + /* Output Term - Insertion control */ + memset(&oterm, 0, sizeof(oterm)); + oterm.id = UAC3_BADD_OT_ID3; + oterm.type = UAC_BIDIR_TERMINAL_HEADSET; + build_connector_control(mixer, map->map, &oterm, false); + } + + 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->connector_map = map->connector_map; + break; + } + } + + p = NULL; + while ((p = snd_usb_find_csint_desc(mixer->hostif->extra, + mixer->hostif->extralen, + p, UAC_OUTPUT_TERMINAL)) != NULL) { + if (!snd_usb_validate_audio_desc(p, mixer->protocol)) + continue; /* skip invalid descriptor */ + + if (mixer->protocol == UAC_VERSION_1) { + struct uac1_output_terminal_descriptor *desc = p; + + /* 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 if (mixer->protocol == UAC_VERSION_2) { + struct uac2_output_terminal_descriptor *desc = p; + + /* 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; + + if ((state.oterm.type & 0xff00) != 0x0100 && + uac_v2v3_control_is_readable(le16_to_cpu(desc->bmControls), + UAC2_TE_CONNECTOR)) { + build_connector_control(state.mixer, state.map, + &state.oterm, false); + } + } else { /* UAC_VERSION_3 */ + struct uac3_output_terminal_descriptor *desc = p; + + /* 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 = le16_to_cpu(desc->wTerminalDescrStr); + err = parse_audio_unit(&state, desc->bSourceID); + if (err < 0 && err != -EINVAL) + return err; + + /* + * For UAC3, use the same approach to also add the + * clock selectors + */ + err = parse_audio_unit(&state, desc->bCSourceID); + if (err < 0 && err != -EINVAL) + return err; + + if ((state.oterm.type & 0xff00) != 0x0100 && + uac_v2v3_control_is_readable(le32_to_cpu(desc->bmControls), + UAC3_TE_INSERTION)) { + build_connector_control(state.mixer, state.map, + &state.oterm, false); + } + } + } + + return 0; +} + +static int delegate_notify(struct usb_mixer_interface *mixer, int unitid, + u8 *control, u8 *channel) +{ + const struct usbmix_connector_map *map = mixer->connector_map; + + if (!map) + return unitid; + + for (; map->id; map++) { + if (map->id == unitid) { + if (control && map->control) + *control = map->control; + if (channel && map->channel) + *channel = map->channel; + return map->delegated_id; + } + } + return unitid; +} + +void snd_usb_mixer_notify_id(struct usb_mixer_interface *mixer, int unitid) +{ + struct usb_mixer_elem_list *list; + + unitid = delegate_notify(mixer, unitid, NULL, NULL); + + for_each_mixer_elem(list, mixer, unitid) { + struct usb_mixer_elem_info *info; + + if (!list->is_std_info) + continue; + info = mixer_elem_list_to_info(list); + /* invalidate cache, so the value is read from the device */ + info->cached = 0; + 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 = mixer_elem_list_to_info(list); + static const char * const val_types[] = { + [USB_MIXER_BOOLEAN] = "BOOLEAN", + [USB_MIXER_INV_BOOLEAN] = "INV_BOOLEAN", + [USB_MIXER_S8] = "S8", + [USB_MIXER_U8] = "U8", + [USB_MIXER_S16] = "S16", + [USB_MIXER_U16] = "U16", + [USB_MIXER_S32] = "S32", + [USB_MIXER_U32] = "U32", + [USB_MIXER_BESPOKEN] = "BESPOKEN", + }; + 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, mixer_ctrl_intf(mixer), + mixer->ignore_ctl_error); + snd_iprintf(buffer, "Card: %s\n", chip->card->longname); + for (unitid = 0; unitid < MAX_ID_ELEMS; unitid++) { + for_each_mixer_elem(list, mixer, unitid) { + 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; + unsigned int count = 0; + + if (channel >= MAX_CHANNELS) { + usb_audio_dbg(mixer->chip, + "%s(): bogus channel number %d\n", + __func__, channel); + return; + } + + unitid = delegate_notify(mixer, unitid, &control, &channel); + + for_each_mixer_elem(list, mixer, unitid) + count++; + + if (count == 0) + return; + + for_each_mixer_elem(list, mixer, unitid) { + struct usb_mixer_elem_info *info; + + if (!list->kctl) + continue; + if (!list->is_std_info) + continue; + + info = mixer_elem_list_to_info(list); + if (count > 1 && 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) +{ + static const struct snd_device_ops dev_ops = { + .dev_free = snd_usb_mixer_dev_free + }; + struct usb_mixer_interface *mixer; + 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 = !!(chip->quirk_flags & QUIRK_FLAG_IGNORE_CTL_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; + case UAC_VERSION_3: + mixer->protocol = UAC_VERSION_3; + break; + } + + if (mixer->protocol == UAC_VERSION_3 && + chip->badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) { + err = snd_usb_mixer_controls_badd(mixer, ctrlif); + if (err < 0) + goto _error; + } else { + err = snd_usb_mixer_controls(mixer); + if (err < 0) + goto _error; + } + + err = snd_usb_mixer_status_create(mixer); + if (err < 0) + goto _error; + + err = snd_usb_mixer_apply_create_quirk(mixer); + if (err < 0) + goto _error; + + 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_ro_proc_new(chip->card, "usbmixer", 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) +{ + if (mixer->disconnected) + return; + if (mixer->urb) + usb_kill_urb(mixer->urb); + if (mixer->rc_urb) + usb_kill_urb(mixer->rc_urb); + if (mixer->private_free) + mixer->private_free(mixer); + mixer->disconnected = true; +} + +/* 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); + if (mixer->private_suspend) + mixer->private_suspend(mixer); + return 0; +} + +static int restore_mixer_value(struct usb_mixer_elem_list *list) +{ + struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list); + int c, err, idx; + + if (cval->val_type == USB_MIXER_BESPOKEN) + return 0; + + if (cval->cmask) { + idx = 0; + for (c = 0; c < MAX_CHANNELS; c++) { + if (!(cval->cmask & (1 << c))) + continue; + if (cval->cached & (1 << (c + 1))) { + err = snd_usb_set_cur_mix_value(cval, c + 1, idx, + cval->cache_val[idx]); + if (err < 0) + break; + } + idx++; + } + } else { + /* master */ + if (cval->cached) + snd_usb_set_cur_mix_value(cval, 0, 0, *cval->cache_val); + } + + return 0; +} + +int snd_usb_mixer_resume(struct usb_mixer_interface *mixer) +{ + struct usb_mixer_elem_list *list; + int id, err; + + /* restore cached mixer values */ + for (id = 0; id < MAX_ID_ELEMS; id++) { + for_each_mixer_elem(list, mixer, id) { + if (list->resume) { + err = list->resume(list); + if (err < 0) + return err; + } + } + } + + snd_usb_mixer_resume_quirk(mixer); + + return snd_usb_mixer_activate(mixer); +} + +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; + list->resume = restore_mixer_value; +} |