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 <linux/init.h>
23 #include <linux/i2c.h>
24 #include <linux/kmod.h>
25 #include <linux/slab.h>
26 #include <sound/core.h>
30 #define DACA_I2C_ADDR 0x4d
33 #define DACA_REG_SR 0x01
34 #define DACA_REG_AVOL 0x02
35 #define DACA_REG_GCFG 0x03
37 /* maximum volume value */
38 #define DACA_VOL_MAX 0x38
42 struct pmac_keywest i2c;
43 int left_vol, right_vol;
44 unsigned int deemphasis : 1;
45 unsigned int amp_on : 1;
50 * initialize / detect DACA
52 static int daca_init_client(struct pmac_keywest *i2c)
54 unsigned short wdata = 0x00;
55 /* SR: no swap, 1bit delay, 32-48kHz */
56 /* GCFG: power amp inverted, DAC on */
57 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
58 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
60 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
61 2, (unsigned char*)&wdata);
67 static int daca_set_volume(struct pmac_daca *mix)
69 unsigned char data[2];
71 if (! mix->i2c.client)
74 if (mix->left_vol > DACA_VOL_MAX)
75 data[0] = DACA_VOL_MAX;
77 data[0] = mix->left_vol;
78 if (mix->right_vol > DACA_VOL_MAX)
79 data[1] = DACA_VOL_MAX;
81 data[1] = mix->right_vol;
82 data[1] |= mix->deemphasis ? 0x40 : 0;
83 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
85 snd_printk(KERN_ERR "failed to set volume \n");
92 /* deemphasis switch */
93 #define daca_info_deemphasis snd_ctl_boolean_mono_info
95 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
96 struct snd_ctl_elem_value *ucontrol)
98 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
99 struct pmac_daca *mix;
100 if (! (mix = chip->mixer_data))
102 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
106 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
107 struct snd_ctl_elem_value *ucontrol)
109 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
110 struct pmac_daca *mix;
113 if (! (mix = chip->mixer_data))
115 change = mix->deemphasis != ucontrol->value.integer.value[0];
117 mix->deemphasis = !!ucontrol->value.integer.value[0];
118 daca_set_volume(mix);
124 static int daca_info_volume(struct snd_kcontrol *kcontrol,
125 struct snd_ctl_elem_info *uinfo)
127 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
129 uinfo->value.integer.min = 0;
130 uinfo->value.integer.max = DACA_VOL_MAX;
134 static int daca_get_volume(struct snd_kcontrol *kcontrol,
135 struct snd_ctl_elem_value *ucontrol)
137 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
138 struct pmac_daca *mix;
139 if (! (mix = chip->mixer_data))
141 ucontrol->value.integer.value[0] = mix->left_vol;
142 ucontrol->value.integer.value[1] = mix->right_vol;
146 static int daca_put_volume(struct snd_kcontrol *kcontrol,
147 struct snd_ctl_elem_value *ucontrol)
149 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
150 struct pmac_daca *mix;
154 if (! (mix = chip->mixer_data))
156 vol[0] = ucontrol->value.integer.value[0];
157 vol[1] = ucontrol->value.integer.value[1];
158 if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
160 change = mix->left_vol != vol[0] ||
161 mix->right_vol != vol[1];
163 mix->left_vol = vol[0];
164 mix->right_vol = vol[1];
165 daca_set_volume(mix);
170 /* amplifier switch */
171 #define daca_info_amp daca_info_deemphasis
173 static int daca_get_amp(struct snd_kcontrol *kcontrol,
174 struct snd_ctl_elem_value *ucontrol)
176 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
177 struct pmac_daca *mix;
178 if (! (mix = chip->mixer_data))
180 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
184 static int daca_put_amp(struct snd_kcontrol *kcontrol,
185 struct snd_ctl_elem_value *ucontrol)
187 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
188 struct pmac_daca *mix;
191 if (! (mix = chip->mixer_data))
193 change = mix->amp_on != ucontrol->value.integer.value[0];
195 mix->amp_on = !!ucontrol->value.integer.value[0];
196 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
197 mix->amp_on ? 0x05 : 0x04);
202 static struct snd_kcontrol_new daca_mixers[] = {
203 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
204 .name = "Deemphasis Switch",
205 .info = daca_info_deemphasis,
206 .get = daca_get_deemphasis,
207 .put = daca_put_deemphasis
209 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
210 .name = "Master Playback Volume",
211 .info = daca_info_volume,
212 .get = daca_get_volume,
213 .put = daca_put_volume
215 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
216 .name = "Power Amplifier Switch",
217 .info = daca_info_amp,
225 static void daca_resume(struct snd_pmac *chip)
227 struct pmac_daca *mix = chip->mixer_data;
228 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
229 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
230 mix->amp_on ? 0x05 : 0x04);
231 daca_set_volume(mix);
233 #endif /* CONFIG_PM */
236 static void daca_cleanup(struct snd_pmac *chip)
238 struct pmac_daca *mix = chip->mixer_data;
241 snd_pmac_keywest_cleanup(&mix->i2c);
243 chip->mixer_data = NULL;
247 int __devinit snd_pmac_daca_init(struct snd_pmac *chip)
250 struct pmac_daca *mix;
252 request_module("i2c-powermac");
254 mix = kzalloc(sizeof(*mix), GFP_KERNEL);
257 chip->mixer_data = mix;
258 chip->mixer_free = daca_cleanup;
259 mix->amp_on = 1; /* default on */
261 mix->i2c.addr = DACA_I2C_ADDR;
262 mix->i2c.init_client = daca_init_client;
263 mix->i2c.name = "DACA";
264 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
270 strcpy(chip->card->mixername, "PowerMac DACA");
272 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
273 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
278 chip->resume = daca_resume;