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/i2c-dev.h>
26 #include <linux/kmod.h>
27 #include <linux/slab.h>
28 #include <sound/core.h>
32 #define DACA_I2C_ADDR 0x4d
35 #define DACA_REG_SR 0x01
36 #define DACA_REG_AVOL 0x02
37 #define DACA_REG_GCFG 0x03
39 /* maximum volume value */
40 #define DACA_VOL_MAX 0x38
43 typedef struct pmac_daca_t {
45 int left_vol, right_vol;
46 unsigned int deemphasis : 1;
47 unsigned int amp_on : 1;
52 * initialize / detect DACA
54 static int daca_init_client(pmac_keywest_t *i2c)
56 unsigned short wdata = 0x00;
57 /* SR: no swap, 1bit delay, 32-48kHz */
58 /* GCFG: power amp inverted, DAC on */
59 if (snd_pmac_keywest_write_byte(i2c, DACA_REG_SR, 0x08) < 0 ||
60 snd_pmac_keywest_write_byte(i2c, DACA_REG_GCFG, 0x05) < 0)
62 return snd_pmac_keywest_write(i2c, DACA_REG_AVOL, 2, (unsigned char*)&wdata);
68 static int daca_set_volume(pmac_daca_t *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 (snd_pmac_keywest_write(&mix->i2c, DACA_REG_AVOL, 2, data) < 0) {
85 snd_printk("failed to set volume \n");
92 /* deemphasis switch */
93 static int daca_info_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
95 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
97 uinfo->value.integer.min = 0;
98 uinfo->value.integer.max = 1;
102 static int daca_get_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
104 pmac_t *chip = snd_kcontrol_chip(kcontrol);
106 if (! (mix = chip->mixer_data))
108 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
112 static int daca_put_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
114 pmac_t *chip = snd_kcontrol_chip(kcontrol);
118 if (! (mix = chip->mixer_data))
120 change = mix->deemphasis != ucontrol->value.integer.value[0];
122 mix->deemphasis = ucontrol->value.integer.value[0];
123 daca_set_volume(mix);
129 static int daca_info_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
131 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
133 uinfo->value.integer.min = 0;
134 uinfo->value.integer.max = DACA_VOL_MAX;
138 static int daca_get_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
140 pmac_t *chip = snd_kcontrol_chip(kcontrol);
142 if (! (mix = chip->mixer_data))
144 ucontrol->value.integer.value[0] = mix->left_vol;
145 ucontrol->value.integer.value[1] = mix->right_vol;
149 static int daca_put_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
151 pmac_t *chip = snd_kcontrol_chip(kcontrol);
155 if (! (mix = chip->mixer_data))
157 change = mix->left_vol != ucontrol->value.integer.value[0] ||
158 mix->right_vol != ucontrol->value.integer.value[1];
160 mix->left_vol = ucontrol->value.integer.value[0];
161 mix->right_vol = ucontrol->value.integer.value[1];
162 daca_set_volume(mix);
167 /* amplifier switch */
168 #define daca_info_amp daca_info_deemphasis
170 static int daca_get_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
172 pmac_t *chip = snd_kcontrol_chip(kcontrol);
174 if (! (mix = chip->mixer_data))
176 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
180 static int daca_put_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
182 pmac_t *chip = snd_kcontrol_chip(kcontrol);
186 if (! (mix = chip->mixer_data))
188 change = mix->amp_on != ucontrol->value.integer.value[0];
190 mix->amp_on = ucontrol->value.integer.value[0];
191 snd_pmac_keywest_write_byte(&mix->i2c, DACA_REG_GCFG,
192 mix->amp_on ? 0x05 : 0x04);
197 static snd_kcontrol_new_t daca_mixers[] = {
198 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
199 .name = "Deemphasis Switch",
200 .info = daca_info_deemphasis,
201 .get = daca_get_deemphasis,
202 .put = daca_put_deemphasis
204 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
205 .name = "Master Playback Volume",
206 .info = daca_info_volume,
207 .get = daca_get_volume,
208 .put = daca_put_volume
210 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
211 .name = "Power Amplifier Switch",
212 .info = daca_info_amp,
219 #ifdef CONFIG_PMAC_PBOOK
220 static void daca_resume(pmac_t *chip)
222 pmac_daca_t *mix = chip->mixer_data;
223 snd_pmac_keywest_write_byte(&mix->i2c, DACA_REG_SR, 0x08);
224 snd_pmac_keywest_write_byte(&mix->i2c, DACA_REG_GCFG,
225 mix->amp_on ? 0x05 : 0x04);
226 daca_set_volume(mix);
228 #endif /* CONFIG_PMAC_PBOOK */
231 static void daca_cleanup(pmac_t *chip)
233 pmac_daca_t *mix = chip->mixer_data;
236 snd_pmac_keywest_cleanup(&mix->i2c);
238 chip->mixer_data = NULL;
242 int __init snd_pmac_daca_init(pmac_t *chip)
248 if (current->fs->root)
249 request_module("i2c-keywest");
250 #endif /* CONFIG_KMOD */
252 mix = kmalloc(sizeof(*mix), GFP_KERNEL);
255 memset(mix, 0, sizeof(*mix));
256 chip->mixer_data = mix;
257 chip->mixer_free = daca_cleanup;
258 mix->amp_on = 1; /* default on */
260 mix->i2c.addr = DACA_I2C_ADDR;
261 mix->i2c.init_client = daca_init_client;
262 mix->i2c.name = "DACA";
263 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
269 strcpy(chip->card->mixername, "PowerMac DACA");
271 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
272 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
276 #ifdef CONFIG_PMAC_PBOOK
277 chip->resume = daca_resume;