Root/sound/ppc/daca.c

1/*
2 * PMac DACA lowlevel functions
3 *
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 *
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.
10 *
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.
15 *
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
19 */
20
21
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>
27#include "pmac.h"
28
29/* i2c address */
30#define DACA_I2C_ADDR 0x4d
31
32/* registers */
33#define DACA_REG_SR 0x01
34#define DACA_REG_AVOL 0x02
35#define DACA_REG_GCFG 0x03
36
37/* maximum volume value */
38#define DACA_VOL_MAX 0x38
39
40
41struct pmac_daca {
42    struct pmac_keywest i2c;
43    int left_vol, right_vol;
44    unsigned int deemphasis : 1;
45    unsigned int amp_on : 1;
46};
47
48
49/*
50 * initialize / detect DACA
51 */
52static int daca_init_client(struct pmac_keywest *i2c)
53{
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)
59        return -EINVAL;
60    return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
61                      2, (unsigned char*)&wdata);
62}
63
64/*
65 * update volume
66 */
67static int daca_set_volume(struct pmac_daca *mix)
68{
69    unsigned char data[2];
70  
71    if (! mix->i2c.client)
72        return -ENODEV;
73  
74    if (mix->left_vol > DACA_VOL_MAX)
75        data[0] = DACA_VOL_MAX;
76    else
77        data[0] = mix->left_vol;
78    if (mix->right_vol > DACA_VOL_MAX)
79        data[1] = DACA_VOL_MAX;
80    else
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,
84                       2, data) < 0) {
85        snd_printk(KERN_ERR "failed to set volume \n");
86        return -EINVAL;
87    }
88    return 0;
89}
90
91
92/* deemphasis switch */
93#define daca_info_deemphasis snd_ctl_boolean_mono_info
94
95static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
96                   struct snd_ctl_elem_value *ucontrol)
97{
98    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
99    struct pmac_daca *mix;
100    if (! (mix = chip->mixer_data))
101        return -ENODEV;
102    ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
103    return 0;
104}
105
106static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
107                   struct snd_ctl_elem_value *ucontrol)
108{
109    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
110    struct pmac_daca *mix;
111    int change;
112
113    if (! (mix = chip->mixer_data))
114        return -ENODEV;
115    change = mix->deemphasis != ucontrol->value.integer.value[0];
116    if (change) {
117        mix->deemphasis = !!ucontrol->value.integer.value[0];
118        daca_set_volume(mix);
119    }
120    return change;
121}
122
123/* output volume */
124static int daca_info_volume(struct snd_kcontrol *kcontrol,
125                struct snd_ctl_elem_info *uinfo)
126{
127    uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
128    uinfo->count = 2;
129    uinfo->value.integer.min = 0;
130    uinfo->value.integer.max = DACA_VOL_MAX;
131    return 0;
132}
133
134static int daca_get_volume(struct snd_kcontrol *kcontrol,
135               struct snd_ctl_elem_value *ucontrol)
136{
137    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
138    struct pmac_daca *mix;
139    if (! (mix = chip->mixer_data))
140        return -ENODEV;
141    ucontrol->value.integer.value[0] = mix->left_vol;
142    ucontrol->value.integer.value[1] = mix->right_vol;
143    return 0;
144}
145
146static int daca_put_volume(struct snd_kcontrol *kcontrol,
147               struct snd_ctl_elem_value *ucontrol)
148{
149    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
150    struct pmac_daca *mix;
151    unsigned int vol[2];
152    int change;
153
154    if (! (mix = chip->mixer_data))
155        return -ENODEV;
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)
159        return -EINVAL;
160    change = mix->left_vol != vol[0] ||
161        mix->right_vol != vol[1];
162    if (change) {
163        mix->left_vol = vol[0];
164        mix->right_vol = vol[1];
165        daca_set_volume(mix);
166    }
167    return change;
168}
169
170/* amplifier switch */
171#define daca_info_amp daca_info_deemphasis
172
173static int daca_get_amp(struct snd_kcontrol *kcontrol,
174            struct snd_ctl_elem_value *ucontrol)
175{
176    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
177    struct pmac_daca *mix;
178    if (! (mix = chip->mixer_data))
179        return -ENODEV;
180    ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
181    return 0;
182}
183
184static int daca_put_amp(struct snd_kcontrol *kcontrol,
185            struct snd_ctl_elem_value *ucontrol)
186{
187    struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
188    struct pmac_daca *mix;
189    int change;
190
191    if (! (mix = chip->mixer_data))
192        return -ENODEV;
193    change = mix->amp_on != ucontrol->value.integer.value[0];
194    if (change) {
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);
198    }
199    return change;
200}
201
202static 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
208    },
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
214    },
215    { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
216      .name = "Power Amplifier Switch",
217      .info = daca_info_amp,
218      .get = daca_get_amp,
219      .put = daca_put_amp
220    },
221};
222
223
224#ifdef CONFIG_PM
225static void daca_resume(struct snd_pmac *chip)
226{
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);
232}
233#endif /* CONFIG_PM */
234
235
236static void daca_cleanup(struct snd_pmac *chip)
237{
238    struct pmac_daca *mix = chip->mixer_data;
239    if (! mix)
240        return;
241    snd_pmac_keywest_cleanup(&mix->i2c);
242    kfree(mix);
243    chip->mixer_data = NULL;
244}
245
246/* exported */
247int __devinit snd_pmac_daca_init(struct snd_pmac *chip)
248{
249    int i, err;
250    struct pmac_daca *mix;
251
252    request_module("i2c-powermac");
253
254    mix = kzalloc(sizeof(*mix), GFP_KERNEL);
255    if (! mix)
256        return -ENOMEM;
257    chip->mixer_data = mix;
258    chip->mixer_free = daca_cleanup;
259    mix->amp_on = 1; /* default on */
260
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)
265        return err;
266
267    /*
268     * build mixers
269     */
270    strcpy(chip->card->mixername, "PowerMac DACA");
271
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)
274            return err;
275    }
276
277#ifdef CONFIG_PM
278    chip->resume = daca_resume;
279#endif
280
281    return 0;
282}
283

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