release/src-rt-6.x.4708/linux/linux-2.6.36/sound/drivers/pcsp/pcsp_mixer.c

   1 /*
   2  * PC-Speaker driver for Linux
   3  *
   4  * Mixer implementation.
   5  * Copyright (C) 2001-2008  Stas Sergeev
   6  */
   7
   8 #include <sound/core.h>
   9 #include <sound/control.h>
  10 #include "pcsp.h"
  11
  12
  13 static int pcsp_enable_info(struct snd_kcontrol *kcontrol,
  14                             struct snd_ctl_elem_info *uinfo)
  15 {
  16         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  17         uinfo->count = 1;
  18         uinfo->value.integer.min = 0;
  19         uinfo->value.integer.max = 1;
  20         return 0;
  21 }
  22
  23 static int pcsp_enable_get(struct snd_kcontrol *kcontrol,
  24                            struct snd_ctl_elem_value *ucontrol)
  25 {
  26         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  27         ucontrol->value.integer.value[0] = chip->enable;
  28         return 0;
  29 }
  30
  31 static int pcsp_enable_put(struct snd_kcontrol *kcontrol,
  32                            struct snd_ctl_elem_value *ucontrol)
  33 {
  34         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  35         int changed = 0;
  36         int enab = ucontrol->value.integer.value[0];
  37         if (enab != chip->enable) {
  38                 chip->enable = enab;
  39                 changed = 1;
  40         }
  41         return changed;
  42 }
  43
  44 static int pcsp_treble_info(struct snd_kcontrol *kcontrol,
  45                             struct snd_ctl_elem_info *uinfo)
  46 {
  47         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  48         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  49         uinfo->count = 1;
  50         uinfo->value.enumerated.items = chip->max_treble + 1;
  51         if (uinfo->value.enumerated.item > chip->max_treble)
  52                 uinfo->value.enumerated.item = chip->max_treble;
  53         sprintf(uinfo->value.enumerated.name, "%lu",
  54                 (unsigned long)PCSP_CALC_RATE(uinfo->value.enumerated.item));
  55         return 0;
  56 }
  57
  58 static int pcsp_treble_get(struct snd_kcontrol *kcontrol,
  59                            struct snd_ctl_elem_value *ucontrol)
  60 {
  61         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  62         ucontrol->value.enumerated.item[0] = chip->treble;
  63         return 0;
  64 }
  65
  66 static int pcsp_treble_put(struct snd_kcontrol *kcontrol,
  67                            struct snd_ctl_elem_value *ucontrol)
  68 {
  69         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  70         int changed = 0;
  71         int treble = ucontrol->value.enumerated.item[0];
  72         if (treble != chip->treble) {
  73                 chip->treble = treble;
  74 #if PCSP_DEBUG
  75                 printk(KERN_INFO "PCSP: rate set to %li\n", PCSP_RATE());
  76 #endif
  77                 changed = 1;
  78         }
  79         return changed;
  80 }
  81
  82 static int pcsp_pcspkr_info(struct snd_kcontrol *kcontrol,
  83                             struct snd_ctl_elem_info *uinfo)
  84 {
  85         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
  86         uinfo->count = 1;
  87         uinfo->value.integer.min = 0;
  88         uinfo->value.integer.max = 1;
  89         return 0;
  90 }
  91
  92 static int pcsp_pcspkr_get(struct snd_kcontrol *kcontrol,
  93                            struct snd_ctl_elem_value *ucontrol)
  94 {
  95         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
  96         ucontrol->value.integer.value[0] = chip->pcspkr;
  97         return 0;
  98 }
  99
 100 static int pcsp_pcspkr_put(struct snd_kcontrol *kcontrol,
 101                            struct snd_ctl_elem_value *ucontrol)
 102 {
 103         struct snd_pcsp *chip = snd_kcontrol_chip(kcontrol);
 104         int changed = 0;
 105         int spkr = ucontrol->value.integer.value[0];
 106         if (spkr != chip->pcspkr) {
 107                 chip->pcspkr = spkr;
 108                 changed = 1;
 109         }
 110         return changed;
 111 }
 112
 113 #define PCSP_MIXER_CONTROL(ctl_type, ctl_name) \
 114 { \
 115         .iface =        SNDRV_CTL_ELEM_IFACE_MIXER, \
 116         .name =         ctl_name, \
 117         .info =         pcsp_##ctl_type##_info, \
 118         .get =          pcsp_##ctl_type##_get, \
 119         .put =          pcsp_##ctl_type##_put, \
 120 }
 121
 122 static struct snd_kcontrol_new __devinitdata snd_pcsp_controls_pcm[] = {
 123         PCSP_MIXER_CONTROL(enable, "Master Playback Switch"),
 124         PCSP_MIXER_CONTROL(treble, "BaseFRQ Playback Volume"),
 125 };
 126
 127 static struct snd_kcontrol_new __devinitdata snd_pcsp_controls_spkr[] = {
 128         PCSP_MIXER_CONTROL(pcspkr, "Beep Playback Switch"),
 129 };
 130
 131 static int __devinit snd_pcsp_ctls_add(struct snd_pcsp *chip,
 132         struct snd_kcontrol_new *ctls, int num)
 133 {
 134         int i, err;
 135         struct snd_card *card = chip->card;
 136         for (i = 0; i < num; i++) {
 137                 err = snd_ctl_add(card, snd_ctl_new1(ctls + i, chip));
 138                 if (err < 0)
 139                         return err;
 140         }
 141         return 0;
 142 }
 143
 144 int __devinit snd_pcsp_new_mixer(struct snd_pcsp *chip, int nopcm)
 145 {
 146         int err;
 147         struct snd_card *card = chip->card;
 148
 149         if (!nopcm) {
 150                 err = snd_pcsp_ctls_add(chip, snd_pcsp_controls_pcm,
 151                         ARRAY_SIZE(snd_pcsp_controls_pcm));
 152                 if (err < 0)
 153                         return err;
 154         }
 155         err = snd_pcsp_ctls_add(chip, snd_pcsp_controls_spkr,
 156                 ARRAY_SIZE(snd_pcsp_controls_spkr));
 157         if (err < 0)
 158                 return err;
 159
 160         strcpy(card->mixername, "PC-Speaker");
 161
 162         return 0;
 163 }