2 * PMac DACA lowlevel functions
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
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.
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.
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
22 #include <sound/driver.h>
23 #include <linux/init.h>
24 #include <linux/i2c.h>
25 #include <linux/kmod.h>
26 #include <linux/slab.h>
27 #include <sound/core.h>
31 #define DACA_I2C_ADDR 0x4d
34 #define DACA_REG_SR 0x01
35 #define DACA_REG_AVOL 0x02
36 #define DACA_REG_GCFG 0x03
38 /* maximum volume value */
39 #define DACA_VOL_MAX 0x38
43 struct pmac_keywest i2c;
44 int left_vol, right_vol;
45 unsigned int deemphasis : 1;
46 unsigned int amp_on : 1;
51 * initialize / detect DACA
53 static int daca_init_client(struct pmac_keywest *i2c)
55 unsigned short wdata = 0x00;
56 /* SR: no swap, 1bit delay, 32-48kHz */
57 /* GCFG: power amp inverted, DAC on */
58 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
59 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
61 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
62 2, (unsigned char*)&wdata);
68 static int daca_set_volume(struct pmac_daca *mix)
70 unsigned char data[2];
72 if (! mix->i2c.client)
75 if (mix->left_vol > DACA_VOL_MAX)
76 data[0] = DACA_VOL_MAX;
78 data[0] = mix->left_vol;
79 if (mix->right_vol > DACA_VOL_MAX)
80 data[1] = DACA_VOL_MAX;
82 data[1] = mix->right_vol;
83 data[1] |= mix->deemphasis ? 0x40 : 0;
84 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
86 snd_printk("failed to set volume \n");
93 /* deemphasis switch */
94 static int daca_info_deemphasis(struct snd_kcontrol *kcontrol,
95 struct snd_ctl_elem_info *uinfo)
97 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
99 uinfo->value.integer.min = 0;
100 uinfo->value.integer.max = 1;
104 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
105 struct snd_ctl_elem_value *ucontrol)
107 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
108 struct pmac_daca *mix;
109 if (! (mix = chip->mixer_data))
111 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
115 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
116 struct snd_ctl_elem_value *ucontrol)
118 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
119 struct pmac_daca *mix;
122 if (! (mix = chip->mixer_data))
124 change = mix->deemphasis != ucontrol->value.integer.value[0];
126 mix->deemphasis = ucontrol->value.integer.value[0];
127 daca_set_volume(mix);
133 static int daca_info_volume(struct snd_kcontrol *kcontrol,
134 struct snd_ctl_elem_info *uinfo)
136 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
138 uinfo->value.integer.min = 0;
139 uinfo->value.integer.max = DACA_VOL_MAX;
143 static int daca_get_volume(struct snd_kcontrol *kcontrol,
144 struct snd_ctl_elem_value *ucontrol)
146 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
147 struct pmac_daca *mix;
148 if (! (mix = chip->mixer_data))
150 ucontrol->value.integer.value[0] = mix->left_vol;
151 ucontrol->value.integer.value[1] = mix->right_vol;
155 static int daca_put_volume(struct snd_kcontrol *kcontrol,
156 struct snd_ctl_elem_value *ucontrol)
158 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
159 struct pmac_daca *mix;
162 if (! (mix = chip->mixer_data))
164 change = mix->left_vol != ucontrol->value.integer.value[0] ||
165 mix->right_vol != ucontrol->value.integer.value[1];
167 mix->left_vol = ucontrol->value.integer.value[0];
168 mix->right_vol = ucontrol->value.integer.value[1];
169 daca_set_volume(mix);
174 /* amplifier switch */
175 #define daca_info_amp daca_info_deemphasis
177 static int daca_get_amp(struct snd_kcontrol *kcontrol,
178 struct snd_ctl_elem_value *ucontrol)
180 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
181 struct pmac_daca *mix;
182 if (! (mix = chip->mixer_data))
184 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
188 static int daca_put_amp(struct snd_kcontrol *kcontrol,
189 struct snd_ctl_elem_value *ucontrol)
191 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
192 struct pmac_daca *mix;
195 if (! (mix = chip->mixer_data))
197 change = mix->amp_on != ucontrol->value.integer.value[0];
199 mix->amp_on = ucontrol->value.integer.value[0];
200 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
201 mix->amp_on ? 0x05 : 0x04);
206 static struct snd_kcontrol_new daca_mixers[] = {
207 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
208 .name = "Deemphasis Switch",
209 .info = daca_info_deemphasis,
210 .get = daca_get_deemphasis,
211 .put = daca_put_deemphasis
213 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
214 .name = "Master Playback Volume",
215 .info = daca_info_volume,
216 .get = daca_get_volume,
217 .put = daca_put_volume
219 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
220 .name = "Power Amplifier Switch",
221 .info = daca_info_amp,
229 static void daca_resume(struct snd_pmac *chip)
231 struct pmac_daca *mix = chip->mixer_data;
232 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
233 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
234 mix->amp_on ? 0x05 : 0x04);
235 daca_set_volume(mix);
237 #endif /* CONFIG_PM */
240 static void daca_cleanup(struct snd_pmac *chip)
242 struct pmac_daca *mix = chip->mixer_data;
245 snd_pmac_keywest_cleanup(&mix->i2c);
247 chip->mixer_data = NULL;
251 int __init snd_pmac_daca_init(struct snd_pmac *chip)
254 struct pmac_daca *mix;
257 if (current->fs->root)
258 request_module("i2c-powermac");
259 #endif /* CONFIG_KMOD */
261 mix = kmalloc(sizeof(*mix), GFP_KERNEL);
264 memset(mix, 0, sizeof(*mix));
265 chip->mixer_data = mix;
266 chip->mixer_free = daca_cleanup;
267 mix->amp_on = 1; /* default on */
269 mix->i2c.addr = DACA_I2C_ADDR;
270 mix->i2c.init_client = daca_init_client;
271 mix->i2c.name = "DACA";
272 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
278 strcpy(chip->card->mixername, "PowerMac DACA");
280 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
281 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
286 chip->resume = daca_resume;