Linux-2.6.12-rc2
[linux-2.6/kvm.git] / sound / ppc / daca.c
blobf24a91693616f622925988adcf23f970651537e6
1 /*
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>
29 #include "pmac.h"
31 /* i2c address */
32 #define DACA_I2C_ADDR 0x4d
34 /* registers */
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 {
44 pmac_keywest_t i2c;
45 int left_vol, right_vol;
46 unsigned int deemphasis : 1;
47 unsigned int amp_on : 1;
48 } pmac_daca_t;
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 (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
60 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
61 return -EINVAL;
62 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
63 2, (unsigned char*)&wdata);
67 * update volume
69 static int daca_set_volume(pmac_daca_t *mix)
71 unsigned char data[2];
73 if (! mix->i2c.client)
74 return -ENODEV;
76 if (mix->left_vol > DACA_VOL_MAX)
77 data[0] = DACA_VOL_MAX;
78 else
79 data[0] = mix->left_vol;
80 if (mix->right_vol > DACA_VOL_MAX)
81 data[1] = DACA_VOL_MAX;
82 else
83 data[1] = mix->right_vol;
84 data[1] |= mix->deemphasis ? 0x40 : 0;
85 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
86 2, data) < 0) {
87 snd_printk("failed to set volume \n");
88 return -EINVAL;
90 return 0;
94 /* deemphasis switch */
95 static int daca_info_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
97 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
98 uinfo->count = 1;
99 uinfo->value.integer.min = 0;
100 uinfo->value.integer.max = 1;
101 return 0;
104 static int daca_get_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
106 pmac_t *chip = snd_kcontrol_chip(kcontrol);
107 pmac_daca_t *mix;
108 if (! (mix = chip->mixer_data))
109 return -ENODEV;
110 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
111 return 0;
114 static int daca_put_deemphasis(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
116 pmac_t *chip = snd_kcontrol_chip(kcontrol);
117 pmac_daca_t *mix;
118 int change;
120 if (! (mix = chip->mixer_data))
121 return -ENODEV;
122 change = mix->deemphasis != ucontrol->value.integer.value[0];
123 if (change) {
124 mix->deemphasis = ucontrol->value.integer.value[0];
125 daca_set_volume(mix);
127 return change;
130 /* output volume */
131 static int daca_info_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
133 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
134 uinfo->count = 2;
135 uinfo->value.integer.min = 0;
136 uinfo->value.integer.max = DACA_VOL_MAX;
137 return 0;
140 static int daca_get_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
142 pmac_t *chip = snd_kcontrol_chip(kcontrol);
143 pmac_daca_t *mix;
144 if (! (mix = chip->mixer_data))
145 return -ENODEV;
146 ucontrol->value.integer.value[0] = mix->left_vol;
147 ucontrol->value.integer.value[1] = mix->right_vol;
148 return 0;
151 static int daca_put_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
153 pmac_t *chip = snd_kcontrol_chip(kcontrol);
154 pmac_daca_t *mix;
155 int change;
157 if (! (mix = chip->mixer_data))
158 return -ENODEV;
159 change = mix->left_vol != ucontrol->value.integer.value[0] ||
160 mix->right_vol != ucontrol->value.integer.value[1];
161 if (change) {
162 mix->left_vol = ucontrol->value.integer.value[0];
163 mix->right_vol = ucontrol->value.integer.value[1];
164 daca_set_volume(mix);
166 return change;
169 /* amplifier switch */
170 #define daca_info_amp daca_info_deemphasis
172 static int daca_get_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
174 pmac_t *chip = snd_kcontrol_chip(kcontrol);
175 pmac_daca_t *mix;
176 if (! (mix = chip->mixer_data))
177 return -ENODEV;
178 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
179 return 0;
182 static int daca_put_amp(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
184 pmac_t *chip = snd_kcontrol_chip(kcontrol);
185 pmac_daca_t *mix;
186 int change;
188 if (! (mix = chip->mixer_data))
189 return -ENODEV;
190 change = mix->amp_on != ucontrol->value.integer.value[0];
191 if (change) {
192 mix->amp_on = ucontrol->value.integer.value[0];
193 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
194 mix->amp_on ? 0x05 : 0x04);
196 return change;
199 static snd_kcontrol_new_t daca_mixers[] = {
200 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
201 .name = "Deemphasis Switch",
202 .info = daca_info_deemphasis,
203 .get = daca_get_deemphasis,
204 .put = daca_put_deemphasis
206 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
207 .name = "Master Playback Volume",
208 .info = daca_info_volume,
209 .get = daca_get_volume,
210 .put = daca_put_volume
212 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
213 .name = "Power Amplifier Switch",
214 .info = daca_info_amp,
215 .get = daca_get_amp,
216 .put = daca_put_amp
221 #ifdef CONFIG_PMAC_PBOOK
222 static void daca_resume(pmac_t *chip)
224 pmac_daca_t *mix = chip->mixer_data;
225 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
226 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
227 mix->amp_on ? 0x05 : 0x04);
228 daca_set_volume(mix);
230 #endif /* CONFIG_PMAC_PBOOK */
233 static void daca_cleanup(pmac_t *chip)
235 pmac_daca_t *mix = chip->mixer_data;
236 if (! mix)
237 return;
238 snd_pmac_keywest_cleanup(&mix->i2c);
239 kfree(mix);
240 chip->mixer_data = NULL;
243 /* exported */
244 int __init snd_pmac_daca_init(pmac_t *chip)
246 int i, err;
247 pmac_daca_t *mix;
249 #ifdef CONFIG_KMOD
250 if (current->fs->root)
251 request_module("i2c-keywest");
252 #endif /* CONFIG_KMOD */
254 mix = kmalloc(sizeof(*mix), GFP_KERNEL);
255 if (! mix)
256 return -ENOMEM;
257 memset(mix, 0, sizeof(*mix));
258 chip->mixer_data = mix;
259 chip->mixer_free = daca_cleanup;
260 mix->amp_on = 1; /* default on */
262 mix->i2c.addr = DACA_I2C_ADDR;
263 mix->i2c.init_client = daca_init_client;
264 mix->i2c.name = "DACA";
265 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
266 return err;
269 * build mixers
271 strcpy(chip->card->mixername, "PowerMac DACA");
273 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
274 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
275 return err;
278 #ifdef CONFIG_PMAC_PBOOK
279 chip->resume = daca_resume;
280 #endif
282 return 0;