diff options
Diffstat (limited to 'kernel/sound/ppc/daca.c')
| -rw-r--r-- | kernel/sound/ppc/daca.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/kernel/sound/ppc/daca.c b/kernel/sound/ppc/daca.c new file mode 100644 index 000000000..b86526223 --- /dev/null +++ b/kernel/sound/ppc/daca.c @@ -0,0 +1,282 @@ +/* + * PMac DACA lowlevel functions + * + * Copyright (c) by Takashi Iwai <tiwai@suse.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 <linux/init.h> +#include <linux/i2c.h> +#include <linux/kmod.h> +#include <linux/slab.h> +#include <sound/core.h> +#include "pmac.h" + +/* i2c address */ +#define DACA_I2C_ADDR 0x4d + +/* registers */ +#define DACA_REG_SR 0x01 +#define DACA_REG_AVOL 0x02 +#define DACA_REG_GCFG 0x03 + +/* maximum volume value */ +#define DACA_VOL_MAX 0x38 + + +struct pmac_daca { + struct pmac_keywest i2c; + int left_vol, right_vol; + unsigned int deemphasis : 1; + unsigned int amp_on : 1; +}; + + +/* + * initialize / detect DACA + */ +static int daca_init_client(struct pmac_keywest *i2c) +{ + unsigned short wdata = 0x00; + /* SR: no swap, 1bit delay, 32-48kHz */ + /* GCFG: power amp inverted, DAC on */ + if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 || + i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0) + return -EINVAL; + return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL, + 2, (unsigned char*)&wdata); +} + +/* + * update volume + */ +static int daca_set_volume(struct pmac_daca *mix) +{ + unsigned char data[2]; + + if (! mix->i2c.client) + return -ENODEV; + + if (mix->left_vol > DACA_VOL_MAX) + data[0] = DACA_VOL_MAX; + else + data[0] = mix->left_vol; + if (mix->right_vol > DACA_VOL_MAX) + data[1] = DACA_VOL_MAX; + else + data[1] = mix->right_vol; + data[1] |= mix->deemphasis ? 0x40 : 0; + if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL, + 2, data) < 0) { + snd_printk(KERN_ERR "failed to set volume \n"); + return -EINVAL; + } + return 0; +} + + +/* deemphasis switch */ +#define daca_info_deemphasis snd_ctl_boolean_mono_info + +static int daca_get_deemphasis(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + if (! (mix = chip->mixer_data)) + return -ENODEV; + ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0; + return 0; +} + +static int daca_put_deemphasis(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + int change; + + if (! (mix = chip->mixer_data)) + return -ENODEV; + change = mix->deemphasis != ucontrol->value.integer.value[0]; + if (change) { + mix->deemphasis = !!ucontrol->value.integer.value[0]; + daca_set_volume(mix); + } + return change; +} + +/* output volume */ +static int daca_info_volume(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 = DACA_VOL_MAX; + return 0; +} + +static int daca_get_volume(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + if (! (mix = chip->mixer_data)) + return -ENODEV; + ucontrol->value.integer.value[0] = mix->left_vol; + ucontrol->value.integer.value[1] = mix->right_vol; + return 0; +} + +static int daca_put_volume(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + unsigned int vol[2]; + int change; + + if (! (mix = chip->mixer_data)) + return -ENODEV; + vol[0] = ucontrol->value.integer.value[0]; + vol[1] = ucontrol->value.integer.value[1]; + if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX) + return -EINVAL; + change = mix->left_vol != vol[0] || + mix->right_vol != vol[1]; + if (change) { + mix->left_vol = vol[0]; + mix->right_vol = vol[1]; + daca_set_volume(mix); + } + return change; +} + +/* amplifier switch */ +#define daca_info_amp daca_info_deemphasis + +static int daca_get_amp(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + if (! (mix = chip->mixer_data)) + return -ENODEV; + ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0; + return 0; +} + +static int daca_put_amp(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); + struct pmac_daca *mix; + int change; + + if (! (mix = chip->mixer_data)) + return -ENODEV; + change = mix->amp_on != ucontrol->value.integer.value[0]; + if (change) { + mix->amp_on = !!ucontrol->value.integer.value[0]; + i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG, + mix->amp_on ? 0x05 : 0x04); + } + return change; +} + +static struct snd_kcontrol_new daca_mixers[] = { + { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Deemphasis Switch", + .info = daca_info_deemphasis, + .get = daca_get_deemphasis, + .put = daca_put_deemphasis + }, + { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Master Playback Volume", + .info = daca_info_volume, + .get = daca_get_volume, + .put = daca_put_volume + }, + { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, + .name = "Power Amplifier Switch", + .info = daca_info_amp, + .get = daca_get_amp, + .put = daca_put_amp + }, +}; + + +#ifdef CONFIG_PM +static void daca_resume(struct snd_pmac *chip) +{ + struct pmac_daca *mix = chip->mixer_data; + i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08); + i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG, + mix->amp_on ? 0x05 : 0x04); + daca_set_volume(mix); +} +#endif /* CONFIG_PM */ + + +static void daca_cleanup(struct snd_pmac *chip) +{ + struct pmac_daca *mix = chip->mixer_data; + if (! mix) + return; + snd_pmac_keywest_cleanup(&mix->i2c); + kfree(mix); + chip->mixer_data = NULL; +} + +/* exported */ +int snd_pmac_daca_init(struct snd_pmac *chip) +{ + int i, err; + struct pmac_daca *mix; + + request_module("i2c-powermac"); + + mix = kzalloc(sizeof(*mix), GFP_KERNEL); + if (! mix) + return -ENOMEM; + chip->mixer_data = mix; + chip->mixer_free = daca_cleanup; + mix->amp_on = 1; /* default on */ + + mix->i2c.addr = DACA_I2C_ADDR; + mix->i2c.init_client = daca_init_client; + mix->i2c.name = "DACA"; + if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0) + return err; + + /* + * build mixers + */ + strcpy(chip->card->mixername, "PowerMac DACA"); + + for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) { + if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0) + return err; + } + +#ifdef CONFIG_PM + chip->resume = daca_resume; +#endif + + return 0; +} |