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1da177e4 LT |
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 <sound/driver.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/i2c.h> | |
1da177e4 LT |
25 | #include <linux/kmod.h> |
26 | #include <linux/slab.h> | |
27 | #include <sound/core.h> | |
28 | #include "pmac.h" | |
29 | ||
30 | /* i2c address */ | |
31 | #define DACA_I2C_ADDR 0x4d | |
32 | ||
33 | /* registers */ | |
34 | #define DACA_REG_SR 0x01 | |
35 | #define DACA_REG_AVOL 0x02 | |
36 | #define DACA_REG_GCFG 0x03 | |
37 | ||
38 | /* maximum volume value */ | |
39 | #define DACA_VOL_MAX 0x38 | |
40 | ||
41 | ||
65b29f50 TI |
42 | struct pmac_daca { |
43 | struct pmac_keywest i2c; | |
1da177e4 LT |
44 | int left_vol, right_vol; |
45 | unsigned int deemphasis : 1; | |
46 | unsigned int amp_on : 1; | |
65b29f50 | 47 | }; |
1da177e4 LT |
48 | |
49 | ||
50 | /* | |
51 | * initialize / detect DACA | |
52 | */ | |
65b29f50 | 53 | static int daca_init_client(struct pmac_keywest *i2c) |
1da177e4 LT |
54 | { |
55 | unsigned short wdata = 0x00; | |
56 | /* SR: no swap, 1bit delay, 32-48kHz */ | |
57 | /* GCFG: power amp inverted, DAC on */ | |
58 | if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 || | |
59 | i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0) | |
60 | return -EINVAL; | |
61 | return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL, | |
62 | 2, (unsigned char*)&wdata); | |
63 | } | |
64 | ||
65 | /* | |
66 | * update volume | |
67 | */ | |
65b29f50 | 68 | static int daca_set_volume(struct pmac_daca *mix) |
1da177e4 LT |
69 | { |
70 | unsigned char data[2]; | |
71 | ||
72 | if (! mix->i2c.client) | |
73 | return -ENODEV; | |
74 | ||
75 | if (mix->left_vol > DACA_VOL_MAX) | |
76 | data[0] = DACA_VOL_MAX; | |
77 | else | |
78 | data[0] = mix->left_vol; | |
79 | if (mix->right_vol > DACA_VOL_MAX) | |
80 | data[1] = DACA_VOL_MAX; | |
81 | else | |
82 | data[1] = mix->right_vol; | |
83 | data[1] |= mix->deemphasis ? 0x40 : 0; | |
84 | if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL, | |
85 | 2, data) < 0) { | |
86 | snd_printk("failed to set volume \n"); | |
87 | return -EINVAL; | |
88 | } | |
89 | return 0; | |
90 | } | |
91 | ||
92 | ||
93 | /* deemphasis switch */ | |
a5ce8890 | 94 | #define daca_info_deemphasis snd_ctl_boolean_mono_info |
1da177e4 | 95 | |
65b29f50 TI |
96 | static int daca_get_deemphasis(struct snd_kcontrol *kcontrol, |
97 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 98 | { |
65b29f50 TI |
99 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
100 | struct pmac_daca *mix; | |
1da177e4 LT |
101 | if (! (mix = chip->mixer_data)) |
102 | return -ENODEV; | |
103 | ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0; | |
104 | return 0; | |
105 | } | |
106 | ||
65b29f50 TI |
107 | static int daca_put_deemphasis(struct snd_kcontrol *kcontrol, |
108 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 109 | { |
65b29f50 TI |
110 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
111 | struct pmac_daca *mix; | |
1da177e4 LT |
112 | int change; |
113 | ||
114 | if (! (mix = chip->mixer_data)) | |
115 | return -ENODEV; | |
116 | change = mix->deemphasis != ucontrol->value.integer.value[0]; | |
117 | if (change) { | |
118 | mix->deemphasis = ucontrol->value.integer.value[0]; | |
119 | daca_set_volume(mix); | |
120 | } | |
121 | return change; | |
122 | } | |
123 | ||
124 | /* output volume */ | |
65b29f50 TI |
125 | static int daca_info_volume(struct snd_kcontrol *kcontrol, |
126 | struct snd_ctl_elem_info *uinfo) | |
1da177e4 LT |
127 | { |
128 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; | |
129 | uinfo->count = 2; | |
130 | uinfo->value.integer.min = 0; | |
131 | uinfo->value.integer.max = DACA_VOL_MAX; | |
132 | return 0; | |
133 | } | |
134 | ||
65b29f50 TI |
135 | static int daca_get_volume(struct snd_kcontrol *kcontrol, |
136 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 137 | { |
65b29f50 TI |
138 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
139 | struct pmac_daca *mix; | |
1da177e4 LT |
140 | if (! (mix = chip->mixer_data)) |
141 | return -ENODEV; | |
142 | ucontrol->value.integer.value[0] = mix->left_vol; | |
143 | ucontrol->value.integer.value[1] = mix->right_vol; | |
144 | return 0; | |
145 | } | |
146 | ||
65b29f50 TI |
147 | static int daca_put_volume(struct snd_kcontrol *kcontrol, |
148 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 149 | { |
65b29f50 TI |
150 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
151 | struct pmac_daca *mix; | |
1da177e4 LT |
152 | int change; |
153 | ||
154 | if (! (mix = chip->mixer_data)) | |
155 | return -ENODEV; | |
156 | change = mix->left_vol != ucontrol->value.integer.value[0] || | |
157 | mix->right_vol != ucontrol->value.integer.value[1]; | |
158 | if (change) { | |
159 | mix->left_vol = ucontrol->value.integer.value[0]; | |
160 | mix->right_vol = ucontrol->value.integer.value[1]; | |
161 | daca_set_volume(mix); | |
162 | } | |
163 | return change; | |
164 | } | |
165 | ||
166 | /* amplifier switch */ | |
167 | #define daca_info_amp daca_info_deemphasis | |
168 | ||
65b29f50 TI |
169 | static int daca_get_amp(struct snd_kcontrol *kcontrol, |
170 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 171 | { |
65b29f50 TI |
172 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
173 | struct pmac_daca *mix; | |
1da177e4 LT |
174 | if (! (mix = chip->mixer_data)) |
175 | return -ENODEV; | |
176 | ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0; | |
177 | return 0; | |
178 | } | |
179 | ||
65b29f50 TI |
180 | static int daca_put_amp(struct snd_kcontrol *kcontrol, |
181 | struct snd_ctl_elem_value *ucontrol) | |
1da177e4 | 182 | { |
65b29f50 TI |
183 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
184 | struct pmac_daca *mix; | |
1da177e4 LT |
185 | int change; |
186 | ||
187 | if (! (mix = chip->mixer_data)) | |
188 | return -ENODEV; | |
189 | change = mix->amp_on != ucontrol->value.integer.value[0]; | |
190 | if (change) { | |
191 | mix->amp_on = ucontrol->value.integer.value[0]; | |
192 | i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG, | |
193 | mix->amp_on ? 0x05 : 0x04); | |
194 | } | |
195 | return change; | |
196 | } | |
197 | ||
65b29f50 | 198 | static struct snd_kcontrol_new daca_mixers[] = { |
1da177e4 LT |
199 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
200 | .name = "Deemphasis Switch", | |
201 | .info = daca_info_deemphasis, | |
202 | .get = daca_get_deemphasis, | |
203 | .put = daca_put_deemphasis | |
204 | }, | |
205 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
206 | .name = "Master Playback Volume", | |
207 | .info = daca_info_volume, | |
208 | .get = daca_get_volume, | |
209 | .put = daca_put_volume | |
210 | }, | |
211 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, | |
212 | .name = "Power Amplifier Switch", | |
213 | .info = daca_info_amp, | |
214 | .get = daca_get_amp, | |
215 | .put = daca_put_amp | |
216 | }, | |
217 | }; | |
218 | ||
219 | ||
8c870933 | 220 | #ifdef CONFIG_PM |
65b29f50 | 221 | static void daca_resume(struct snd_pmac *chip) |
1da177e4 | 222 | { |
65b29f50 | 223 | struct pmac_daca *mix = chip->mixer_data; |
1da177e4 LT |
224 | i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08); |
225 | i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG, | |
226 | mix->amp_on ? 0x05 : 0x04); | |
227 | daca_set_volume(mix); | |
228 | } | |
8c870933 | 229 | #endif /* CONFIG_PM */ |
1da177e4 LT |
230 | |
231 | ||
65b29f50 | 232 | static void daca_cleanup(struct snd_pmac *chip) |
1da177e4 | 233 | { |
65b29f50 | 234 | struct pmac_daca *mix = chip->mixer_data; |
1da177e4 LT |
235 | if (! mix) |
236 | return; | |
237 | snd_pmac_keywest_cleanup(&mix->i2c); | |
238 | kfree(mix); | |
239 | chip->mixer_data = NULL; | |
240 | } | |
241 | ||
242 | /* exported */ | |
65b29f50 | 243 | int __init snd_pmac_daca_init(struct snd_pmac *chip) |
1da177e4 LT |
244 | { |
245 | int i, err; | |
65b29f50 | 246 | struct pmac_daca *mix; |
1da177e4 LT |
247 | |
248 | #ifdef CONFIG_KMOD | |
249 | if (current->fs->root) | |
4d6c5889 | 250 | request_module("i2c-powermac"); |
1da177e4 LT |
251 | #endif /* CONFIG_KMOD */ |
252 | ||
59feddb2 | 253 | mix = kzalloc(sizeof(*mix), GFP_KERNEL); |
1da177e4 LT |
254 | if (! mix) |
255 | return -ENOMEM; | |
1da177e4 LT |
256 | chip->mixer_data = mix; |
257 | chip->mixer_free = daca_cleanup; | |
258 | mix->amp_on = 1; /* default on */ | |
259 | ||
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) | |
264 | return err; | |
265 | ||
266 | /* | |
267 | * build mixers | |
268 | */ | |
269 | strcpy(chip->card->mixername, "PowerMac DACA"); | |
270 | ||
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) | |
273 | return err; | |
274 | } | |
275 | ||
8c870933 | 276 | #ifdef CONFIG_PM |
1da177e4 LT |
277 | chip->resume = daca_resume; |
278 | #endif | |
279 | ||
280 | return 0; | |
281 | } |