1 files changed, 233 insertions, 0 deletions

diff --git a/sound/i2c/other/pt2258.c b/sound/i2c/other/pt2258.c
new file mode 100644
index 000000000000..e91cc3b44de5
--- /dev/null
+++ b/sound/i2c/other/pt2258.c
@@ -0,0 +1,233 @@
+/*
+ *   ALSA Driver for the PT2258 volume controller.
+ *
+ *      Copyright (c) 2006  Jochen Voss <voss@seehuhn.de>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */      
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/tlv.h>
+#include <sound/i2c.h>
+#include <sound/pt2258.h>
+
+MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>");
+MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)");
+MODULE_LICENSE("GPL");
+
+#define PT2258_CMD_RESET 0xc0
+#define PT2258_CMD_UNMUTE 0xf8
+#define PT2258_CMD_MUTE 0xf9
+
+static const unsigned char pt2258_channel_code[12] = {
+        0x80, 0x90,             /* channel 1: -10dB, -1dB */
+        0x40, 0x50,             /* channel 2: -10dB, -1dB */
+        0x00, 0x10,             /* channel 3: -10dB, -1dB */
+        0x20, 0x30,             /* channel 4: -10dB, -1dB */
+        0x60, 0x70,             /* channel 5: -10dB, -1dB */
+        0xa0, 0xb0              /* channel 6: -10dB, -1dB */
+};
+
+int snd_pt2258_reset(struct snd_pt2258 *pt)
+{
+        unsigned char bytes[2];
+        int i;
+
+        /* reset chip */
+        bytes[0] = PT2258_CMD_RESET;
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        /* mute all channels */
+        pt->mute = 1;
+        bytes[0] = PT2258_CMD_MUTE;
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        /* set all channels to 0dB */
+        for (i = 0; i < 6; ++i)
+                pt->volume[i] = 0;
+        bytes[0] = 0xd0;
+        bytes[1] = 0xe0;
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        return 0;
+
+      __error:
+        snd_i2c_unlock(pt->i2c_bus);
+        snd_printk(KERN_ERR "PT2258 reset failed\n");
+        return -EIO;
+}
+
+static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol,
+                                     struct snd_ctl_elem_info *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+        uinfo->count = 2;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 79;
+        return 0;
+}
+
+static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
+                                    struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_pt2258 *pt = kcontrol->private_data;
+        int base = kcontrol->private_value;
+
+        /* chip does not support register reads */
+        ucontrol->value.integer.value[0] = 79 - pt->volume[base];
+        ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1];
+        return 0;
+}
+
+static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
+                                    struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_pt2258 *pt = kcontrol->private_data;
+        int base = kcontrol->private_value;
+        unsigned char bytes[2];
+        int val0, val1;
+
+        val0 = 79 - ucontrol->value.integer.value[0];
+        val1 = 79 - ucontrol->value.integer.value[1];
+        if (val0 == pt->volume[base] && val1 == pt->volume[base + 1])
+                return 0;
+
+        pt->volume[base] = val0;
+        bytes[0] = pt2258_channel_code[2 * base] | (val0 / 10);
+        bytes[1] = pt2258_channel_code[2 * base + 1] | (val0 % 10);
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        pt->volume[base + 1] = val1;
+        bytes[0] = pt2258_channel_code[2 * base + 2] | (val1 / 10);
+        bytes[1] = pt2258_channel_code[2 * base + 3] | (val1 % 10);
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        return 1;
+
+      __error:
+        snd_i2c_unlock(pt->i2c_bus);
+        snd_printk(KERN_ERR "PT2258 access failed\n");
+        return -EIO;
+}
+
+static int pt2258_switch_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 pt2258_switch_get(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_pt2258 *pt = kcontrol->private_data;
+
+        ucontrol->value.integer.value[0] = !pt->mute;
+        return 0;
+}
+
+static int pt2258_switch_put(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_value *ucontrol)
+{
+        struct snd_pt2258 *pt = kcontrol->private_data;
+        unsigned char bytes[2];
+        int val;
+
+        val = !ucontrol->value.integer.value[0];
+        if (pt->mute == val)
+                return 0;
+
+        pt->mute = val;
+        bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE;
+        snd_i2c_lock(pt->i2c_bus);
+        if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
+                goto __error;
+        snd_i2c_unlock(pt->i2c_bus);
+
+        return 1;
+
+      __error:
+        snd_i2c_unlock(pt->i2c_bus);
+        snd_printk(KERN_ERR "PT2258 access failed 2\n");
+        return -EIO;
+}
+
+static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0);
+
+int snd_pt2258_build_controls(struct snd_pt2258 *pt)
+{
+        struct snd_kcontrol_new knew;
+        char *names[3] = {
+                "Mic Loopback Playback Volume",
+                "Line Loopback Playback Volume",
+                "CD Loopback Playback Volume"
+        };
+        int i, err;
+
+        for (i = 0; i < 3; ++i) {
+                memset(&knew, 0, sizeof(knew));
+                knew.name = names[i];
+                knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+                knew.count = 1;
+                knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
+                    SNDRV_CTL_ELEM_ACCESS_TLV_READ;
+                knew.private_value = 2 * i;
+                knew.info = pt2258_stereo_volume_info;
+                knew.get = pt2258_stereo_volume_get;
+                knew.put = pt2258_stereo_volume_put;
+                knew.tlv.p = pt2258_db_scale;
+
+                err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
+                if (err < 0)
+                        return err;
+        }
+
+        memset(&knew, 0, sizeof(knew));
+        knew.name = "Loopback Switch";
+        knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+        knew.info = pt2258_switch_info;
+        knew.get = pt2258_switch_get;
+        knew.put = pt2258_switch_put;
+        knew.access = 0;
+        err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
+        if (err < 0)
+                return err;
+
+        return 0;
+}
+
+EXPORT_SYMBOL(snd_pt2258_reset);
+EXPORT_SYMBOL(snd_pt2258_build_controls);