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
41 struct 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 */
52 static 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 */
67 static 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("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
95 static 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
106 static 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 */
124 static 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
134 static 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
146 static 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
173 static 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
184 static 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
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
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
225 static 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
236 static 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 */
247 int __init snd_pmac_daca_init(struct snd_pmac *chip)
248 {
249 int i, err;
250 struct pmac_daca *mix;
251
252 #ifdef CONFIG_KMOD
253 request_module("i2c-powermac");
254 #endif /* CONFIG_KMOD */
255
256 mix = kzalloc(sizeof(*mix), GFP_KERNEL);
257 if (! mix)
258 return -ENOMEM;
259 chip->mixer_data = mix;
260 chip->mixer_free = daca_cleanup;
261 mix->amp_on = 1; /* default on */
262
263 mix->i2c.addr = DACA_I2C_ADDR;
264 mix->i2c.init_client = daca_init_client;
265 mix->i2c.name = "DACA";
266 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
267 return err;
268
269 /*
270 * build mixers
271 */
272 strcpy(chip->card->mixername, "PowerMac DACA");
273
274 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
275 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
276 return err;
277 }
278
279 #ifdef CONFIG_PM
280 chip->resume = daca_resume;
281 #endif
282
283 return 0;
284 }
285
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