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pcsp_mixer.c

/*
 * PC-Speaker driver for Linux
 *
 * Mixer implementation.
 * Copyright (C) 2001-2008  Stas Sergeev
 */

#include <sound/core.h>
#include <sound/control.h>
#include "pcsp.h"


static int pcsp_enable_info(struct snd_kcontrol *kcontrol,
                      struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
      uinfo->count = 1;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 1;
      return 0;
}

static int pcsp_enable_get(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      ucontrol->value.integer.value[0] = chip->enable;
      return 0;
}

static int pcsp_enable_put(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int enab = ucontrol->value.integer.value[0];
      if (enab != chip->enable) {
            chip->enable = enab;
            changed = 1;
      }
      return changed;
}

static int pcsp_treble_info(struct snd_kcontrol *kcontrol,
                      struct snd_ctl_elem_info *uinfo)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 1;
      uinfo->value.enumerated.items = chip->max_treble + 1;
      if (uinfo->value.enumerated.item > chip->max_treble)
            uinfo->value.enumerated.item = chip->max_treble;
      sprintf(uinfo->value.enumerated.name, "%lu",
            (unsigned long)PCSP_CALC_RATE(uinfo->value.enumerated.item));
      return 0;
}

static int pcsp_treble_get(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      ucontrol->value.enumerated.item[0] = chip->treble;
      return 0;
}

static int pcsp_treble_put(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int treble = ucontrol->value.enumerated.item[0];
      if (treble != chip->treble) {
            chip->treble = treble;
#if PCSP_DEBUG
            printk(KERN_INFO "PCSP: rate set to %i\n", PCSP_RATE());
#endif
            changed = 1;
      }
      return changed;
}

static int pcsp_pcspkr_info(struct snd_kcontrol *kcontrol,
                      struct snd_ctl_elem_info *uinfo)
{
      uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
      uinfo->count = 1;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = 1;
      return 0;
}

static int pcsp_pcspkr_get(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      ucontrol->value.integer.value[0] = chip->pcspkr;
      return 0;
}

static int pcsp_pcspkr_put(struct snd_kcontrol *kcontrol,
                     struct snd_ctl_elem_value *ucontrol)
{
      struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
      int changed = 0;
      int spkr = ucontrol->value.integer.value[0];
      if (spkr != chip->pcspkr) {
            chip->pcspkr = spkr;
            changed = 1;
      }
      return changed;
}

#define PCSP_MIXER_CONTROL(ctl_type, ctl_name) \
{ \
      .iface =    SNDRV_CTL_ELEM_IFACE_MIXER, \
      .name =           ctl_name, \
      .info =           pcsp_##ctl_type##_info, \
      .get =            pcsp_##ctl_type##_get, \
      .put =            pcsp_##ctl_type##_put, \
}

static struct snd_kcontrol_new __devinitdata snd_pcsp_controls[] = {
      PCSP_MIXER_CONTROL(enable, "Master Playback Switch"),
      PCSP_MIXER_CONTROL(treble, "BaseFRQ Playback Volume"),
      PCSP_MIXER_CONTROL(pcspkr, "PC Speaker Playback Switch"),
};

int __devinit snd_pcsp_new_mixer(struct snd_pcsp *chip)
{
      struct snd_card *card = chip->card;
      int i, err;

      for (i = 0; i < ARRAY_SIZE(snd_pcsp_controls); i++) {
            err = snd_ctl_add(card,
                         snd_ctl_new1(snd_pcsp_controls + i,
                                    chip));
            if (err < 0)
                  return err;
      }

      strcpy(card->mixername, "PC-Speaker");

      return 0;
}

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