linux/sound/firewire/oxfw/oxfw-spkr.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * oxfw-spkr.c - a part of driver for OXFW970/971 based devices
   4 *
   5 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
   6 */
   7
   8#include "oxfw.h"
   9
  10struct fw_spkr {
  11        bool mute;
  12        s16 volume[6];
  13        s16 volume_min;
  14        s16 volume_max;
  15
  16        unsigned int mixer_channels;
  17        u8 mute_fb_id;
  18        u8 volume_fb_id;
  19};
  20
  21enum control_action { CTL_READ, CTL_WRITE };
  22enum control_attribute {
  23        CTL_MIN         = 0x02,
  24        CTL_MAX         = 0x03,
  25        CTL_CURRENT     = 0x10,
  26};
  27
  28static int avc_audio_feature_mute(struct fw_unit *unit, u8 fb_id, bool *value,
  29                                  enum control_action action)
  30{
  31        u8 *buf;
  32        u8 response_ok;
  33        int err;
  34
  35        buf = kmalloc(11, GFP_KERNEL);
  36        if (!buf)
  37                return -ENOMEM;
  38
  39        if (action == CTL_READ) {
  40                buf[0] = 0x01;          /* AV/C, STATUS */
  41                response_ok = 0x0c;     /*       STABLE */
  42        } else {
  43                buf[0] = 0x00;          /* AV/C, CONTROL */
  44                response_ok = 0x09;     /*       ACCEPTED */
  45        }
  46        buf[1] = 0x08;                  /* audio unit 0 */
  47        buf[2] = 0xb8;                  /* FUNCTION BLOCK */
  48        buf[3] = 0x81;                  /* function block type: feature */
  49        buf[4] = fb_id;                 /* function block ID */
  50        buf[5] = 0x10;                  /* control attribute: current */
  51        buf[6] = 0x02;                  /* selector length */
  52        buf[7] = 0x00;                  /* audio channel number */
  53        buf[8] = 0x01;                  /* control selector: mute */
  54        buf[9] = 0x01;                  /* control data length */
  55        if (action == CTL_READ)
  56                buf[10] = 0xff;
  57        else
  58                buf[10] = *value ? 0x70 : 0x60;
  59
  60        err = fcp_avc_transaction(unit, buf, 11, buf, 11, 0x3fe);
  61        if (err < 0)
  62                goto error;
  63        if (err < 11) {
  64                dev_err(&unit->device, "short FCP response\n");
  65                err = -EIO;
  66                goto error;
  67        }
  68        if (buf[0] != response_ok) {
  69                dev_err(&unit->device, "mute command failed\n");
  70                err = -EIO;
  71                goto error;
  72        }
  73        if (action == CTL_READ)
  74                *value = buf[10] == 0x70;
  75
  76        err = 0;
  77
  78error:
  79        kfree(buf);
  80
  81        return err;
  82}
  83
  84static int avc_audio_feature_volume(struct fw_unit *unit, u8 fb_id, s16 *value,
  85                                    unsigned int channel,
  86                                    enum control_attribute attribute,
  87                                    enum control_action action)
  88{
  89        u8 *buf;
  90        u8 response_ok;
  91        int err;
  92
  93        buf = kmalloc(12, GFP_KERNEL);
  94        if (!buf)
  95                return -ENOMEM;
  96
  97        if (action == CTL_READ) {
  98                buf[0] = 0x01;          /* AV/C, STATUS */
  99                response_ok = 0x0c;     /*       STABLE */
 100        } else {
 101                buf[0] = 0x00;          /* AV/C, CONTROL */
 102                response_ok = 0x09;     /*       ACCEPTED */
 103        }
 104        buf[1] = 0x08;                  /* audio unit 0 */
 105        buf[2] = 0xb8;                  /* FUNCTION BLOCK */
 106        buf[3] = 0x81;                  /* function block type: feature */
 107        buf[4] = fb_id;                 /* function block ID */
 108        buf[5] = attribute;             /* control attribute */
 109        buf[6] = 0x02;                  /* selector length */
 110        buf[7] = channel;               /* audio channel number */
 111        buf[8] = 0x02;                  /* control selector: volume */
 112        buf[9] = 0x02;                  /* control data length */
 113        if (action == CTL_READ) {
 114                buf[10] = 0xff;
 115                buf[11] = 0xff;
 116        } else {
 117                buf[10] = *value >> 8;
 118                buf[11] = *value;
 119        }
 120
 121        err = fcp_avc_transaction(unit, buf, 12, buf, 12, 0x3fe);
 122        if (err < 0)
 123                goto error;
 124        if (err < 12) {
 125                dev_err(&unit->device, "short FCP response\n");
 126                err = -EIO;
 127                goto error;
 128        }
 129        if (buf[0] != response_ok) {
 130                dev_err(&unit->device, "volume command failed\n");
 131                err = -EIO;
 132                goto error;
 133        }
 134        if (action == CTL_READ)
 135                *value = (buf[10] << 8) | buf[11];
 136
 137        err = 0;
 138
 139error:
 140        kfree(buf);
 141
 142        return err;
 143}
 144
 145static int spkr_mute_get(struct snd_kcontrol *control,
 146                         struct snd_ctl_elem_value *value)
 147{
 148        struct snd_oxfw *oxfw = control->private_data;
 149        struct fw_spkr *spkr = oxfw->spec;
 150
 151        value->value.integer.value[0] = !spkr->mute;
 152
 153        return 0;
 154}
 155
 156static int spkr_mute_put(struct snd_kcontrol *control,
 157                         struct snd_ctl_elem_value *value)
 158{
 159        struct snd_oxfw *oxfw = control->private_data;
 160        struct fw_spkr *spkr = oxfw->spec;
 161        bool mute;
 162        int err;
 163
 164        mute = !value->value.integer.value[0];
 165
 166        if (mute == spkr->mute)
 167                return 0;
 168
 169        err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &mute,
 170                                     CTL_WRITE);
 171        if (err < 0)
 172                return err;
 173        spkr->mute = mute;
 174
 175        return 1;
 176}
 177
 178static int spkr_volume_info(struct snd_kcontrol *control,
 179                            struct snd_ctl_elem_info *info)
 180{
 181        struct snd_oxfw *oxfw = control->private_data;
 182        struct fw_spkr *spkr = oxfw->spec;
 183
 184        info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 185        info->count = spkr->mixer_channels;
 186        info->value.integer.min = spkr->volume_min;
 187        info->value.integer.max = spkr->volume_max;
 188
 189        return 0;
 190}
 191
 192static const u8 channel_map[6] = { 0, 1, 4, 5, 2, 3 };
 193
 194static int spkr_volume_get(struct snd_kcontrol *control,
 195                           struct snd_ctl_elem_value *value)
 196{
 197        struct snd_oxfw *oxfw = control->private_data;
 198        struct fw_spkr *spkr = oxfw->spec;
 199        unsigned int i;
 200
 201        for (i = 0; i < spkr->mixer_channels; ++i)
 202                value->value.integer.value[channel_map[i]] = spkr->volume[i];
 203
 204        return 0;
 205}
 206
 207static int spkr_volume_put(struct snd_kcontrol *control,
 208                           struct snd_ctl_elem_value *value)
 209{
 210        struct snd_oxfw *oxfw = control->private_data;
 211        struct fw_spkr *spkr = oxfw->spec;
 212        unsigned int i, changed_channels;
 213        bool equal_values = true;
 214        s16 volume;
 215        int err;
 216
 217        for (i = 0; i < spkr->mixer_channels; ++i) {
 218                if (value->value.integer.value[i] < spkr->volume_min ||
 219                    value->value.integer.value[i] > spkr->volume_max)
 220                        return -EINVAL;
 221                if (value->value.integer.value[i] !=
 222                    value->value.integer.value[0])
 223                        equal_values = false;
 224        }
 225
 226        changed_channels = 0;
 227        for (i = 0; i < spkr->mixer_channels; ++i)
 228                if (value->value.integer.value[channel_map[i]] !=
 229                                                        spkr->volume[i])
 230                        changed_channels |= 1 << (i + 1);
 231
 232        if (equal_values && changed_channels != 0)
 233                changed_channels = 1 << 0;
 234
 235        for (i = 0; i <= spkr->mixer_channels; ++i) {
 236                volume = value->value.integer.value[channel_map[i ? i - 1 : 0]];
 237                if (changed_channels & (1 << i)) {
 238                        err = avc_audio_feature_volume(oxfw->unit,
 239                                                  spkr->volume_fb_id, &volume,
 240                                                  i, CTL_CURRENT, CTL_WRITE);
 241                        if (err < 0)
 242                                return err;
 243                }
 244                if (i > 0)
 245                        spkr->volume[i - 1] = volume;
 246        }
 247
 248        return changed_channels != 0;
 249}
 250
 251int snd_oxfw_add_spkr(struct snd_oxfw *oxfw, bool is_lacie)
 252{
 253        static const struct snd_kcontrol_new controls[] = {
 254                {
 255                        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 256                        .name = "PCM Playback Switch",
 257                        .info = snd_ctl_boolean_mono_info,
 258                        .get = spkr_mute_get,
 259                        .put = spkr_mute_put,
 260                },
 261                {
 262                        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 263                        .name = "PCM Playback Volume",
 264                        .info = spkr_volume_info,
 265                        .get = spkr_volume_get,
 266                        .put = spkr_volume_put,
 267                },
 268        };
 269        struct fw_spkr *spkr;
 270        unsigned int i, first_ch;
 271        int err;
 272
 273        spkr = devm_kzalloc(&oxfw->card->card_dev, sizeof(struct fw_spkr),
 274                            GFP_KERNEL);
 275        if (!spkr)
 276                return -ENOMEM;
 277        oxfw->spec = spkr;
 278
 279        if (is_lacie) {
 280                spkr->mixer_channels = 1;
 281                spkr->mute_fb_id = 0x01;
 282                spkr->volume_fb_id = 0x01;
 283        } else {
 284                spkr->mixer_channels = 6;
 285                spkr->mute_fb_id = 0x01;
 286                spkr->volume_fb_id = 0x02;
 287        }
 288
 289        err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
 290                                       &spkr->volume_min, 0, CTL_MIN, CTL_READ);
 291        if (err < 0)
 292                return err;
 293        err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
 294                                       &spkr->volume_max, 0, CTL_MAX, CTL_READ);
 295        if (err < 0)
 296                return err;
 297
 298        err = avc_audio_feature_mute(oxfw->unit, spkr->mute_fb_id, &spkr->mute,
 299                                     CTL_READ);
 300        if (err < 0)
 301                return err;
 302
 303        first_ch = spkr->mixer_channels == 1 ? 0 : 1;
 304        for (i = 0; i < spkr->mixer_channels; ++i) {
 305                err = avc_audio_feature_volume(oxfw->unit, spkr->volume_fb_id,
 306                                               &spkr->volume[i], first_ch + i,
 307                                               CTL_CURRENT, CTL_READ);
 308                if (err < 0)
 309                        return err;
 310        }
 311
 312        for (i = 0; i < ARRAY_SIZE(controls); ++i) {
 313                err = snd_ctl_add(oxfw->card,
 314                                  snd_ctl_new1(&controls[i], oxfw));
 315                if (err < 0)
 316                        return err;
 317        }
 318
 319        return 0;
 320}
 321