387 lines
11 KiB
C
387 lines
11 KiB
C
/*
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* Routines for control of the TEA6330T circuit via i2c bus
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* Sound fader control circuit for car radios by Philips Semiconductors
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <sound/driver.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/control.h>
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#include <sound/tea6330t.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
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MODULE_DESCRIPTION("Routines for control of the TEA6330T circuit via i2c bus");
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MODULE_LICENSE("GPL");
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#define TEA6330T_ADDR (0x80>>1) /* fixed address */
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#define TEA6330T_SADDR_VOLUME_LEFT 0x00 /* volume left */
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#define TEA6330T_SADDR_VOLUME_RIGHT 0x01 /* volume right */
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#define TEA6330T_SADDR_BASS 0x02 /* bass control */
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#define TEA6330T_SADDR_TREBLE 0x03 /* treble control */
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#define TEA6330T_SADDR_FADER 0x04 /* fader control */
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#define TEA6330T_MFN 0x20 /* mute control for selected channels */
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#define TEA6330T_FCH 0x10 /* select fader channels - front or rear */
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#define TEA6330T_SADDR_AUDIO_SWITCH 0x05 /* audio switch */
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#define TEA6330T_GMU 0x80 /* mute control, general mute */
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#define TEA6330T_EQN 0x40 /* equalizer switchover (0=equalizer-on) */
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struct tea6330t {
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struct snd_i2c_device *device;
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struct snd_i2c_bus *bus;
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int equalizer;
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int fader;
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unsigned char regs[8];
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unsigned char mleft, mright;
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unsigned char bass, treble;
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unsigned char max_bass, max_treble;
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};
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int snd_tea6330t_detect(struct snd_i2c_bus *bus, int equalizer)
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{
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int res;
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snd_i2c_lock(bus);
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res = snd_i2c_probeaddr(bus, TEA6330T_ADDR);
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snd_i2c_unlock(bus);
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return res;
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}
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#if 0
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static void snd_tea6330t_set(struct tea6330t *tea,
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unsigned char addr, unsigned char value)
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{
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#if 0
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printk(KERN_DEBUG "set - 0x%x/0x%x\n", addr, value);
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#endif
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snd_i2c_write(tea->bus, TEA6330T_ADDR, addr, value, 1);
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}
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#endif
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#define TEA6330T_MASTER_VOLUME(xname, xindex) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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.info = snd_tea6330t_info_master_volume, \
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.get = snd_tea6330t_get_master_volume, .put = snd_tea6330t_put_master_volume }
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static int snd_tea6330t_info_master_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 2;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = 43;
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return 0;
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}
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static int snd_tea6330t_get_master_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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snd_i2c_lock(tea->bus);
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ucontrol->value.integer.value[0] = tea->mleft - 0x14;
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ucontrol->value.integer.value[1] = tea->mright - 0x14;
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snd_i2c_unlock(tea->bus);
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return 0;
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}
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static int snd_tea6330t_put_master_volume(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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int change, count, err;
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unsigned char bytes[3];
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unsigned char val1, val2;
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val1 = (ucontrol->value.integer.value[0] % 44) + 0x14;
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val2 = (ucontrol->value.integer.value[1] % 44) + 0x14;
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snd_i2c_lock(tea->bus);
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change = val1 != tea->mleft || val2 != tea->mright;
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tea->mleft = val1;
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tea->mright = val2;
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count = 0;
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if (tea->regs[TEA6330T_SADDR_VOLUME_LEFT] != 0) {
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bytes[count++] = TEA6330T_SADDR_VOLUME_LEFT;
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bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = tea->mleft;
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}
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if (tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] != 0) {
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if (count == 0)
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bytes[count++] = TEA6330T_SADDR_VOLUME_RIGHT;
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bytes[count++] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = tea->mright;
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}
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if (count > 0) {
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if ((err = snd_i2c_sendbytes(tea->device, bytes, count)) < 0)
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change = err;
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}
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snd_i2c_unlock(tea->bus);
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return change;
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}
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#define TEA6330T_MASTER_SWITCH(xname, xindex) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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.info = snd_tea6330t_info_master_switch, \
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.get = snd_tea6330t_get_master_switch, .put = snd_tea6330t_put_master_switch }
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#define snd_tea6330t_info_master_switch snd_ctl_boolean_stereo_info
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static int snd_tea6330t_get_master_switch(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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snd_i2c_lock(tea->bus);
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ucontrol->value.integer.value[0] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
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ucontrol->value.integer.value[1] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
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snd_i2c_unlock(tea->bus);
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return 0;
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}
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static int snd_tea6330t_put_master_switch(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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int change, err;
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unsigned char bytes[3];
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unsigned char oval1, oval2, val1, val2;
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val1 = ucontrol->value.integer.value[0] & 1;
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val2 = ucontrol->value.integer.value[1] & 1;
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snd_i2c_lock(tea->bus);
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oval1 = tea->regs[TEA6330T_SADDR_VOLUME_LEFT] == 0 ? 0 : 1;
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oval2 = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] == 0 ? 0 : 1;
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change = val1 != oval1 || val2 != oval2;
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tea->regs[TEA6330T_SADDR_VOLUME_LEFT] = val1 ? tea->mleft : 0;
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tea->regs[TEA6330T_SADDR_VOLUME_RIGHT] = val2 ? tea->mright : 0;
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bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
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bytes[1] = tea->regs[TEA6330T_SADDR_VOLUME_LEFT];
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bytes[2] = tea->regs[TEA6330T_SADDR_VOLUME_RIGHT];
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if ((err = snd_i2c_sendbytes(tea->device, bytes, 3)) < 0)
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change = err;
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snd_i2c_unlock(tea->bus);
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return change;
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}
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#define TEA6330T_BASS(xname, xindex) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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.info = snd_tea6330t_info_bass, \
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.get = snd_tea6330t_get_bass, .put = snd_tea6330t_put_bass }
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static int snd_tea6330t_info_bass(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = tea->max_bass;
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return 0;
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}
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static int snd_tea6330t_get_bass(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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ucontrol->value.integer.value[0] = tea->bass;
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return 0;
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}
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static int snd_tea6330t_put_bass(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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int change, err;
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unsigned char bytes[2];
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unsigned char val1;
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val1 = ucontrol->value.integer.value[0] % (tea->max_bass + 1);
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snd_i2c_lock(tea->bus);
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tea->bass = val1;
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val1 += tea->equalizer ? 7 : 3;
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change = tea->regs[TEA6330T_SADDR_BASS] != val1;
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bytes[0] = TEA6330T_SADDR_BASS;
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bytes[1] = tea->regs[TEA6330T_SADDR_BASS] = val1;
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if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
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change = err;
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snd_i2c_unlock(tea->bus);
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return change;
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}
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#define TEA6330T_TREBLE(xname, xindex) \
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{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
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.info = snd_tea6330t_info_treble, \
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.get = snd_tea6330t_get_treble, .put = snd_tea6330t_put_treble }
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static int snd_tea6330t_info_treble(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = 1;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = tea->max_treble;
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return 0;
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}
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static int snd_tea6330t_get_treble(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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ucontrol->value.integer.value[0] = tea->treble;
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return 0;
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}
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static int snd_tea6330t_put_treble(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct tea6330t *tea = snd_kcontrol_chip(kcontrol);
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int change, err;
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unsigned char bytes[2];
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unsigned char val1;
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val1 = ucontrol->value.integer.value[0] % (tea->max_treble + 1);
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snd_i2c_lock(tea->bus);
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tea->treble = val1;
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val1 += 3;
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change = tea->regs[TEA6330T_SADDR_TREBLE] != val1;
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bytes[0] = TEA6330T_SADDR_TREBLE;
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bytes[1] = tea->regs[TEA6330T_SADDR_TREBLE] = val1;
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if ((err = snd_i2c_sendbytes(tea->device, bytes, 2)) < 0)
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change = err;
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snd_i2c_unlock(tea->bus);
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return change;
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}
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static struct snd_kcontrol_new snd_tea6330t_controls[] = {
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TEA6330T_MASTER_SWITCH("Master Playback Switch", 0),
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TEA6330T_MASTER_VOLUME("Master Playback Volume", 0),
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TEA6330T_BASS("Tone Control - Bass", 0),
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TEA6330T_TREBLE("Tone Control - Treble", 0)
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};
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static void snd_tea6330_free(struct snd_i2c_device *device)
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{
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kfree(device->private_data);
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}
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int snd_tea6330t_update_mixer(struct snd_card *card,
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struct snd_i2c_bus *bus,
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int equalizer, int fader)
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{
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struct snd_i2c_device *device;
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struct tea6330t *tea;
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struct snd_kcontrol_new *knew;
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unsigned int idx;
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int err = -ENOMEM;
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u8 default_treble, default_bass;
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unsigned char bytes[7];
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tea = kzalloc(sizeof(*tea), GFP_KERNEL);
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if (tea == NULL)
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return -ENOMEM;
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if ((err = snd_i2c_device_create(bus, "TEA6330T", TEA6330T_ADDR, &device)) < 0) {
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kfree(tea);
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return err;
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}
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tea->device = device;
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tea->bus = bus;
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tea->equalizer = equalizer;
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tea->fader = fader;
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device->private_data = tea;
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device->private_free = snd_tea6330_free;
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snd_i2c_lock(bus);
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/* turn fader off and handle equalizer */
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tea->regs[TEA6330T_SADDR_FADER] = 0x3f;
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tea->regs[TEA6330T_SADDR_AUDIO_SWITCH] = equalizer ? 0 : TEA6330T_EQN;
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/* initialize mixer */
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if (!tea->equalizer) {
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tea->max_bass = 9;
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tea->max_treble = 8;
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default_bass = 3 + 4;
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tea->bass = 4;
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default_treble = 3 + 4;
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tea->treble = 4;
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} else {
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tea->max_bass = 5;
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tea->max_treble = 0;
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default_bass = 7 + 4;
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tea->bass = 4;
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default_treble = 3;
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tea->treble = 0;
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}
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tea->mleft = tea->mright = 0x14;
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tea->regs[TEA6330T_SADDR_BASS] = default_bass;
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tea->regs[TEA6330T_SADDR_TREBLE] = default_treble;
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/* compose I2C message and put the hardware to initial state */
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bytes[0] = TEA6330T_SADDR_VOLUME_LEFT;
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for (idx = 0; idx < 6; idx++)
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bytes[idx+1] = tea->regs[idx];
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if ((err = snd_i2c_sendbytes(device, bytes, 7)) < 0)
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goto __error;
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strcat(card->mixername, ",TEA6330T");
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if ((err = snd_component_add(card, "TEA6330T")) < 0)
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goto __error;
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for (idx = 0; idx < ARRAY_SIZE(snd_tea6330t_controls); idx++) {
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knew = &snd_tea6330t_controls[idx];
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if (tea->treble == 0 && !strcmp(knew->name, "Tone Control - Treble"))
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continue;
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if ((err = snd_ctl_add(card, snd_ctl_new1(knew, tea))) < 0)
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goto __error;
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}
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snd_i2c_unlock(bus);
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return 0;
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__error:
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snd_i2c_unlock(bus);
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snd_i2c_device_free(device);
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return err;
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}
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EXPORT_SYMBOL(snd_tea6330t_detect);
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EXPORT_SYMBOL(snd_tea6330t_update_mixer);
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/*
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* INIT part
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*/
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static int __init alsa_tea6330t_init(void)
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{
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return 0;
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}
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static void __exit alsa_tea6330t_exit(void)
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{
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}
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module_init(alsa_tea6330t_init)
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module_exit(alsa_tea6330t_exit)
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