[ALSA] Add PC-speaker sound driver

Added PC-speaker sound driver (snd-pcsp).

Signed-off-by: Stas Sergeev <stsp@aknet.ru>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 143 insertions, 0 deletions

diff --git a/sound/drivers/pcsp/pcsp_mixer.c b/sound/drivers/pcsp/pcsp_mixer.c
new file mode 100644
index 000000000000..64a695fef74e
--- /dev/null
+++ b/sound/drivers/pcsp/pcsp_mixer.c
@@ -0,0 +1,143 @@
+/*
+ * 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, "%d", PCSP_RATE());
+        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;
+}