linux/sound/usb/6fire/control.c
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   1/*
   2 * Linux driver for TerraTec DMX 6Fire USB
   3 *
   4 * Mixer control
   5 *
   6 * Author:      Torsten Schenk <torsten.schenk@zoho.com>
   7 * Created:     Jan 01, 2011
   8 * Version:     0.3.0
   9 * Copyright:   (C) Torsten Schenk
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 */
  16
  17#include <linux/interrupt.h>
  18#include <sound/control.h>
  19
  20#include "control.h"
  21#include "comm.h"
  22#include "chip.h"
  23
  24static char *opt_coax_texts[2] = { "Optical", "Coax" };
  25static char *line_phono_texts[2] = { "Line", "Phono" };
  26
  27/*
  28 * calculated with $value\[i\] = 128 \cdot sqrt[3]{\frac{i}{128}}$
  29 * this is done because the linear values cause rapid degredation
  30 * of volume in the uppermost region.
  31 */
  32static const u8 log_volume_table[128] = {
  33        0x00, 0x19, 0x20, 0x24, 0x28, 0x2b, 0x2e, 0x30, 0x32, 0x34,
  34        0x36, 0x38, 0x3a, 0x3b, 0x3d, 0x3e, 0x40, 0x41, 0x42, 0x43,
  35        0x44, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e,
  36        0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x53, 0x54, 0x55, 0x56,
  37        0x56, 0x57, 0x58, 0x58, 0x59, 0x5a, 0x5b, 0x5b, 0x5c, 0x5c,
  38        0x5d, 0x5e, 0x5e, 0x5f, 0x60, 0x60, 0x61, 0x61, 0x62, 0x62,
  39        0x63, 0x63, 0x64, 0x65, 0x65, 0x66, 0x66, 0x67, 0x67, 0x68,
  40        0x68, 0x69, 0x69, 0x6a, 0x6a, 0x6b, 0x6b, 0x6c, 0x6c, 0x6c,
  41        0x6d, 0x6d, 0x6e, 0x6e, 0x6f, 0x6f, 0x70, 0x70, 0x70, 0x71,
  42        0x71, 0x72, 0x72, 0x73, 0x73, 0x73, 0x74, 0x74, 0x75, 0x75,
  43        0x75, 0x76, 0x76, 0x77, 0x77, 0x77, 0x78, 0x78, 0x78, 0x79,
  44        0x79, 0x7a, 0x7a, 0x7a, 0x7b, 0x7b, 0x7b, 0x7c, 0x7c, 0x7c,
  45        0x7d, 0x7d, 0x7d, 0x7e, 0x7e, 0x7e, 0x7f, 0x7f };
  46
  47/*
  48 * data that needs to be sent to device. sets up card internal stuff.
  49 * values dumped from windows driver and filtered by trial'n'error.
  50 */
  51static const struct {
  52        u8 type;
  53        u8 reg;
  54        u8 value;
  55}
  56init_data[] = {
  57        { 0x22, 0x00, 0x00 }, { 0x20, 0x00, 0x08 }, { 0x22, 0x01, 0x01 },
  58        { 0x20, 0x01, 0x08 }, { 0x22, 0x02, 0x00 }, { 0x20, 0x02, 0x08 },
  59        { 0x22, 0x03, 0x00 }, { 0x20, 0x03, 0x08 }, { 0x22, 0x04, 0x00 },
  60        { 0x20, 0x04, 0x08 }, { 0x22, 0x05, 0x01 }, { 0x20, 0x05, 0x08 },
  61        { 0x22, 0x04, 0x01 }, { 0x12, 0x04, 0x00 }, { 0x12, 0x05, 0x00 },
  62        { 0x12, 0x0d, 0x78 }, { 0x12, 0x21, 0x82 }, { 0x12, 0x22, 0x80 },
  63        { 0x12, 0x23, 0x00 }, { 0x12, 0x06, 0x02 }, { 0x12, 0x03, 0x00 },
  64        { 0x12, 0x02, 0x00 }, { 0x22, 0x03, 0x01 },
  65        { 0 } /* TERMINATING ENTRY */
  66};
  67
  68static const int rates_altsetting[] = { 1, 1, 2, 2, 3, 3 };
  69/* values to write to soundcard register for all samplerates */
  70static const u16 rates_6fire_vl[] = {0x00, 0x01, 0x00, 0x01, 0x00, 0x01};
  71static const u16 rates_6fire_vh[] = {0x11, 0x11, 0x10, 0x10, 0x00, 0x00};
  72
  73enum {
  74        DIGITAL_THRU_ONLY_SAMPLERATE = 3
  75};
  76
  77static void usb6fire_control_master_vol_update(struct control_runtime *rt)
  78{
  79        struct comm_runtime *comm_rt = rt->chip->comm;
  80        if (comm_rt) {
  81                /* set volume */
  82                comm_rt->write8(comm_rt, 0x12, 0x0f, 0x7f -
  83                                log_volume_table[rt->master_vol]);
  84                 /* unmute */
  85                comm_rt->write8(comm_rt, 0x12, 0x0e, 0x00);
  86        }
  87}
  88
  89static void usb6fire_control_line_phono_update(struct control_runtime *rt)
  90{
  91        struct comm_runtime *comm_rt = rt->chip->comm;
  92        if (comm_rt) {
  93                comm_rt->write8(comm_rt, 0x22, 0x02, rt->line_phono_switch);
  94                comm_rt->write8(comm_rt, 0x21, 0x02, rt->line_phono_switch);
  95        }
  96}
  97
  98static void usb6fire_control_opt_coax_update(struct control_runtime *rt)
  99{
 100        struct comm_runtime *comm_rt = rt->chip->comm;
 101        if (comm_rt) {
 102                comm_rt->write8(comm_rt, 0x22, 0x00, rt->opt_coax_switch);
 103                comm_rt->write8(comm_rt, 0x21, 0x00, rt->opt_coax_switch);
 104        }
 105}
 106
 107static int usb6fire_control_set_rate(struct control_runtime *rt, int rate)
 108{
 109        int ret;
 110        struct usb_device *device = rt->chip->dev;
 111        struct comm_runtime *comm_rt = rt->chip->comm;
 112
 113        if (rate < 0 || rate >= CONTROL_N_RATES)
 114                return -EINVAL;
 115
 116        ret = usb_set_interface(device, 1, rates_altsetting[rate]);
 117        if (ret < 0)
 118                return ret;
 119
 120        /* set soundcard clock */
 121        ret = comm_rt->write16(comm_rt, 0x02, 0x01, rates_6fire_vl[rate],
 122                        rates_6fire_vh[rate]);
 123        if (ret < 0)
 124                return ret;
 125
 126        return 0;
 127}
 128
 129static int usb6fire_control_set_channels(
 130        struct control_runtime *rt, int n_analog_out,
 131        int n_analog_in, bool spdif_out, bool spdif_in)
 132{
 133        int ret;
 134        struct comm_runtime *comm_rt = rt->chip->comm;
 135
 136        /* enable analog inputs and outputs
 137         * (one bit per stereo-channel) */
 138        ret = comm_rt->write16(comm_rt, 0x02, 0x02,
 139                        (1 << (n_analog_out / 2)) - 1,
 140                        (1 << (n_analog_in / 2)) - 1);
 141        if (ret < 0)
 142                return ret;
 143
 144        /* disable digital inputs and outputs */
 145        /* TODO: use spdif_x to enable/disable digital channels */
 146        ret = comm_rt->write16(comm_rt, 0x02, 0x03, 0x00, 0x00);
 147        if (ret < 0)
 148                return ret;
 149
 150        return 0;
 151}
 152
 153static int usb6fire_control_streaming_update(struct control_runtime *rt)
 154{
 155        struct comm_runtime *comm_rt = rt->chip->comm;
 156
 157        if (comm_rt) {
 158                if (!rt->usb_streaming && rt->digital_thru_switch)
 159                        usb6fire_control_set_rate(rt,
 160                                DIGITAL_THRU_ONLY_SAMPLERATE);
 161                return comm_rt->write16(comm_rt, 0x02, 0x00, 0x00,
 162                        (rt->usb_streaming ? 0x01 : 0x00) |
 163                        (rt->digital_thru_switch ? 0x08 : 0x00));
 164        }
 165        return -EINVAL;
 166}
 167
 168static int usb6fire_control_master_vol_info(struct snd_kcontrol *kcontrol,
 169                struct snd_ctl_elem_info *uinfo)
 170{
 171        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 172        uinfo->count = 1;
 173        uinfo->value.integer.min = 0;
 174        uinfo->value.integer.max = 127;
 175        return 0;
 176}
 177
 178static int usb6fire_control_master_vol_put(struct snd_kcontrol *kcontrol,
 179                struct snd_ctl_elem_value *ucontrol)
 180{
 181        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 182        int changed = 0;
 183        if (rt->master_vol != ucontrol->value.integer.value[0]) {
 184                rt->master_vol = ucontrol->value.integer.value[0];
 185                usb6fire_control_master_vol_update(rt);
 186                changed = 1;
 187        }
 188        return changed;
 189}
 190
 191static int usb6fire_control_master_vol_get(struct snd_kcontrol *kcontrol,
 192                struct snd_ctl_elem_value *ucontrol)
 193{
 194        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 195        ucontrol->value.integer.value[0] = rt->master_vol;
 196        return 0;
 197}
 198
 199static int usb6fire_control_line_phono_info(struct snd_kcontrol *kcontrol,
 200                struct snd_ctl_elem_info *uinfo)
 201{
 202        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 203        uinfo->count = 1;
 204        uinfo->value.enumerated.items = 2;
 205        if (uinfo->value.enumerated.item > 1)
 206                uinfo->value.enumerated.item = 1;
 207        strcpy(uinfo->value.enumerated.name,
 208                        line_phono_texts[uinfo->value.enumerated.item]);
 209        return 0;
 210}
 211
 212static int usb6fire_control_line_phono_put(struct snd_kcontrol *kcontrol,
 213                struct snd_ctl_elem_value *ucontrol)
 214{
 215        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 216        int changed = 0;
 217        if (rt->line_phono_switch != ucontrol->value.integer.value[0]) {
 218                rt->line_phono_switch = ucontrol->value.integer.value[0];
 219                usb6fire_control_line_phono_update(rt);
 220                changed = 1;
 221        }
 222        return changed;
 223}
 224
 225static int usb6fire_control_line_phono_get(struct snd_kcontrol *kcontrol,
 226                struct snd_ctl_elem_value *ucontrol)
 227{
 228        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 229        ucontrol->value.integer.value[0] = rt->line_phono_switch;
 230        return 0;
 231}
 232
 233static int usb6fire_control_opt_coax_info(struct snd_kcontrol *kcontrol,
 234                struct snd_ctl_elem_info *uinfo)
 235{
 236        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 237        uinfo->count = 1;
 238        uinfo->value.enumerated.items = 2;
 239        if (uinfo->value.enumerated.item > 1)
 240                uinfo->value.enumerated.item = 1;
 241        strcpy(uinfo->value.enumerated.name,
 242                        opt_coax_texts[uinfo->value.enumerated.item]);
 243        return 0;
 244}
 245
 246static int usb6fire_control_opt_coax_put(struct snd_kcontrol *kcontrol,
 247                struct snd_ctl_elem_value *ucontrol)
 248{
 249        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 250        int changed = 0;
 251
 252        if (rt->opt_coax_switch != ucontrol->value.enumerated.item[0]) {
 253                rt->opt_coax_switch = ucontrol->value.enumerated.item[0];
 254                usb6fire_control_opt_coax_update(rt);
 255                changed = 1;
 256        }
 257        return changed;
 258}
 259
 260static int usb6fire_control_opt_coax_get(struct snd_kcontrol *kcontrol,
 261                struct snd_ctl_elem_value *ucontrol)
 262{
 263        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 264        ucontrol->value.enumerated.item[0] = rt->opt_coax_switch;
 265        return 0;
 266}
 267
 268static int usb6fire_control_digital_thru_put(struct snd_kcontrol *kcontrol,
 269                struct snd_ctl_elem_value *ucontrol)
 270{
 271        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 272        int changed = 0;
 273
 274        if (rt->digital_thru_switch != ucontrol->value.integer.value[0]) {
 275                rt->digital_thru_switch = ucontrol->value.integer.value[0];
 276                usb6fire_control_streaming_update(rt);
 277                changed = 1;
 278        }
 279        return changed;
 280}
 281
 282static int usb6fire_control_digital_thru_get(struct snd_kcontrol *kcontrol,
 283                struct snd_ctl_elem_value *ucontrol)
 284{
 285        struct control_runtime *rt = snd_kcontrol_chip(kcontrol);
 286        ucontrol->value.integer.value[0] = rt->digital_thru_switch;
 287        return 0;
 288}
 289
 290static struct __devinitdata snd_kcontrol_new elements[] = {
 291        {
 292                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 293                .name = "Master Playback Volume",
 294                .index = 0,
 295                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 296                .info = usb6fire_control_master_vol_info,
 297                .get = usb6fire_control_master_vol_get,
 298                .put = usb6fire_control_master_vol_put
 299        },
 300        {
 301                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 302                .name = "Line/Phono Capture Route",
 303                .index = 0,
 304                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 305                .info = usb6fire_control_line_phono_info,
 306                .get = usb6fire_control_line_phono_get,
 307                .put = usb6fire_control_line_phono_put
 308        },
 309        {
 310                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 311                .name = "Opt/Coax Capture Route",
 312                .index = 0,
 313                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 314                .info = usb6fire_control_opt_coax_info,
 315                .get = usb6fire_control_opt_coax_get,
 316                .put = usb6fire_control_opt_coax_put
 317        },
 318        {
 319                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 320                .name = "Digital Thru Playback Route",
 321                .index = 0,
 322                .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 323                .info = snd_ctl_boolean_mono_info,
 324                .get = usb6fire_control_digital_thru_get,
 325                .put = usb6fire_control_digital_thru_put
 326        },
 327        {}
 328};
 329
 330int __devinit usb6fire_control_init(struct sfire_chip *chip)
 331{
 332        int i;
 333        int ret;
 334        struct control_runtime *rt = kzalloc(sizeof(struct control_runtime),
 335                        GFP_KERNEL);
 336        struct comm_runtime *comm_rt = chip->comm;
 337
 338        if (!rt)
 339                return -ENOMEM;
 340
 341        rt->chip = chip;
 342        rt->update_streaming = usb6fire_control_streaming_update;
 343        rt->set_rate = usb6fire_control_set_rate;
 344        rt->set_channels = usb6fire_control_set_channels;
 345
 346        i = 0;
 347        while (init_data[i].type) {
 348                comm_rt->write8(comm_rt, init_data[i].type, init_data[i].reg,
 349                                init_data[i].value);
 350                i++;
 351        }
 352
 353        usb6fire_control_opt_coax_update(rt);
 354        usb6fire_control_line_phono_update(rt);
 355        usb6fire_control_master_vol_update(rt);
 356        usb6fire_control_streaming_update(rt);
 357
 358        i = 0;
 359        while (elements[i].name) {
 360                ret = snd_ctl_add(chip->card, snd_ctl_new1(&elements[i], rt));
 361                if (ret < 0) {
 362                        kfree(rt);
 363                        snd_printk(KERN_ERR PREFIX "cannot add control.\n");
 364                        return ret;
 365                }
 366                i++;
 367        }
 368
 369        chip->control = rt;
 370        return 0;
 371}
 372
 373void usb6fire_control_abort(struct sfire_chip *chip)
 374{}
 375
 376void usb6fire_control_destroy(struct sfire_chip *chip)
 377{
 378        kfree(chip->control);
 379        chip->control = NULL;
 380}
 381