[mirror_ubuntu-bionic-kernel.git] / sound / i2c / other / pt2258.c

/*
 *   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/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 < 0 || val0 > 79 || val1 < 0 || val1 > 79)
		return -EINVAL;
	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;
}

#define pt2258_switch_info	snd_ctl_boolean_mono_info

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);
Commit	Line	Data
feaa6a74 JV	1	/*
	2	* ALSA Driver for the PT2258 volume controller.
	3	*
	4	* Copyright (c) 2006 Jochen Voss <voss@seehuhn.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21
feaa6a74 JV	22	#include <sound/core.h>
	23	#include <sound/control.h>
	24	#include <sound/tlv.h>
	25	#include <sound/i2c.h>
	26	#include <sound/pt2258.h>
	27
	28	MODULE_AUTHOR("Jochen Voss <voss@seehuhn.de>");
	29	MODULE_DESCRIPTION("PT2258 volume controller (Princeton Technology Corp.)");
	30	MODULE_LICENSE("GPL");
	31
	32	#define PT2258_CMD_RESET 0xc0
	33	#define PT2258_CMD_UNMUTE 0xf8
	34	#define PT2258_CMD_MUTE 0xf9
	35
	36	static const unsigned char pt2258_channel_code[12] = {
	37	0x80, 0x90, /* channel 1: -10dB, -1dB */
	38	0x40, 0x50, /* channel 2: -10dB, -1dB */
	39	0x00, 0x10, /* channel 3: -10dB, -1dB */
	40	0x20, 0x30, /* channel 4: -10dB, -1dB */
	41	0x60, 0x70, /* channel 5: -10dB, -1dB */
	42	0xa0, 0xb0 /* channel 6: -10dB, -1dB */
	43	};
	44
	45	int snd_pt2258_reset(struct snd_pt2258 *pt)
	46	{
	47	unsigned char bytes[2];
	48	int i;
	49
	50	/* reset chip */
	51	bytes[0] = PT2258_CMD_RESET;
	52	snd_i2c_lock(pt->i2c_bus);
	53	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
	54	goto __error;
	55	snd_i2c_unlock(pt->i2c_bus);
	56
	57	/* mute all channels */
	58	pt->mute = 1;
	59	bytes[0] = PT2258_CMD_MUTE;
	60	snd_i2c_lock(pt->i2c_bus);
	61	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
	62	goto __error;
	63	snd_i2c_unlock(pt->i2c_bus);
	64
	65	/* set all channels to 0dB */
	66	for (i = 0; i < 6; ++i)
	67	pt->volume[i] = 0;
	68	bytes[0] = 0xd0;
	69	bytes[1] = 0xe0;
	70	snd_i2c_lock(pt->i2c_bus);
	71	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
	72	goto __error;
	73	snd_i2c_unlock(pt->i2c_bus);
	74
	75	return 0;
	76
	77	__error:
	78	snd_i2c_unlock(pt->i2c_bus);
	79	snd_printk(KERN_ERR "PT2258 reset failed\n");
	80	return -EIO;
	81	}
	82
	83	static int pt2258_stereo_volume_info(struct snd_kcontrol *kcontrol,
	84	struct snd_ctl_elem_info *uinfo)
	85	{
86	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
87	uinfo->count = 2;
88	uinfo->value.integer.min = 0;
89	uinfo->value.integer.max = 79;
90	return 0;
91	}
92
93	static int pt2258_stereo_volume_get(struct snd_kcontrol *kcontrol,
94	struct snd_ctl_elem_value *ucontrol)
95	{
96	struct snd_pt2258 *pt = kcontrol->private_data;
97	int base = kcontrol->private_value;
98
99	/* chip does not support register reads */
100	ucontrol->value.integer.value[0] = 79 - pt->volume[base];
101	ucontrol->value.integer.value[1] = 79 - pt->volume[base + 1];
102	return 0;
103	}
104
105	static int pt2258_stereo_volume_put(struct snd_kcontrol *kcontrol,
106	struct snd_ctl_elem_value *ucontrol)
107	{
108	struct snd_pt2258 *pt = kcontrol->private_data;
109	int base = kcontrol->private_value;
110	unsigned char bytes[2];
111	int val0, val1;
112
113	val0 = 79 - ucontrol->value.integer.value[0];
114	val1 = 79 - ucontrol->value.integer.value[1];
3b892467 TI	115	if (val0 < 0 \|\| val0 > 79 \|\| val1 < 0 \|\| val1 > 79)
3b892467 TI	116	return -EINVAL;
feaa6a74 JV	117	if (val0 == pt->volume[base] && val1 == pt->volume[base + 1])
	118	return 0;
	119
	120	pt->volume[base] = val0;
	121	bytes[0] = pt2258_channel_code[2 * base] \| (val0 / 10);
	122	bytes[1] = pt2258_channel_code[2 * base + 1] \| (val0 % 10);
	123	snd_i2c_lock(pt->i2c_bus);
	124	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
	125	goto __error;
	126	snd_i2c_unlock(pt->i2c_bus);
	127
	128	pt->volume[base + 1] = val1;
	129	bytes[0] = pt2258_channel_code[2 * base + 2] \| (val1 / 10);
	130	bytes[1] = pt2258_channel_code[2 * base + 3] \| (val1 % 10);
	131	snd_i2c_lock(pt->i2c_bus);
	132	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 2) != 2)
	133	goto __error;
	134	snd_i2c_unlock(pt->i2c_bus);
	135
	136	return 1;
	137
	138	__error:
	139	snd_i2c_unlock(pt->i2c_bus);
	140	snd_printk(KERN_ERR "PT2258 access failed\n");
	141	return -EIO;
	142	}
	143
a5ce8890	144	#define pt2258_switch_info snd_ctl_boolean_mono_info
feaa6a74 JV	145
	146	static int pt2258_switch_get(struct snd_kcontrol *kcontrol,
	147	struct snd_ctl_elem_value *ucontrol)
	148	{
	149	struct snd_pt2258 *pt = kcontrol->private_data;
	150
	151	ucontrol->value.integer.value[0] = !pt->mute;
	152	return 0;
	153	}
	154
	155	static int pt2258_switch_put(struct snd_kcontrol *kcontrol,
	156	struct snd_ctl_elem_value *ucontrol)
	157	{
	158	struct snd_pt2258 *pt = kcontrol->private_data;
	159	unsigned char bytes[2];
	160	int val;
	161
	162	val = !ucontrol->value.integer.value[0];
	163	if (pt->mute == val)
	164	return 0;
	165
	166	pt->mute = val;
	167	bytes[0] = val ? PT2258_CMD_MUTE : PT2258_CMD_UNMUTE;
	168	snd_i2c_lock(pt->i2c_bus);
	169	if (snd_i2c_sendbytes(pt->i2c_dev, bytes, 1) != 1)
	170	goto __error;
	171	snd_i2c_unlock(pt->i2c_bus);
	172
	173	return 1;
	174
	175	__error:
	176	snd_i2c_unlock(pt->i2c_bus);
	177	snd_printk(KERN_ERR "PT2258 access failed 2\n");
	178	return -EIO;
	179	}
	180
0cb29ea0	181	static const DECLARE_TLV_DB_SCALE(pt2258_db_scale, -7900, 100, 0);
feaa6a74 JV	182
	183	int snd_pt2258_build_controls(struct snd_pt2258 *pt)
	184	{
	185	struct snd_kcontrol_new knew;
	186	char *names[3] = {
	187	"Mic Loopback Playback Volume",
	188	"Line Loopback Playback Volume",
	189	"CD Loopback Playback Volume"
	190	};
	191	int i, err;
	192
	193	for (i = 0; i < 3; ++i) {
	194	memset(&knew, 0, sizeof(knew));
	195	knew.name = names[i];
	196	knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	197	knew.count = 1;
	198	knew.access = SNDRV_CTL_ELEM_ACCESS_READWRITE \|
	199	SNDRV_CTL_ELEM_ACCESS_TLV_READ;
	200	knew.private_value = 2 * i;
	201	knew.info = pt2258_stereo_volume_info;
	202	knew.get = pt2258_stereo_volume_get;
	203	knew.put = pt2258_stereo_volume_put;
	204	knew.tlv.p = pt2258_db_scale;
	205
	206	err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
	207	if (err < 0)
	208	return err;
	209	}
	210
	211	memset(&knew, 0, sizeof(knew));
	212	knew.name = "Loopback Switch";
	213	knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
	214	knew.info = pt2258_switch_info;
	215	knew.get = pt2258_switch_get;
	216	knew.put = pt2258_switch_put;
	217	knew.access = 0;
	218	err = snd_ctl_add(pt->card, snd_ctl_new1(&knew, pt));
	219	if (err < 0)
	220	return err;
	221
	222	return 0;
	223	}
	224
	225	EXPORT_SYMBOL(snd_pt2258_reset);
	226	EXPORT_SYMBOL(snd_pt2258_build_controls);