1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PMac DACA lowlevel functions
4 *
5 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
6 */
7
8
9 #include <linux/init.h>
10 #include <linux/i2c.h>
11 #include <linux/kmod.h>
12 #include <linux/slab.h>
13 #include <sound/core.h>
14 #include "pmac.h"
15
16 /* i2c address */
17 #define DACA_I2C_ADDR 0x4d
18
19 /* registers */
20 #define DACA_REG_SR 0x01
21 #define DACA_REG_AVOL 0x02
22 #define DACA_REG_GCFG 0x03
23
24 /* maximum volume value */
25 #define DACA_VOL_MAX 0x38
26
27
28 struct pmac_daca {
29 struct pmac_keywest i2c;
30 int left_vol, right_vol;
31 unsigned int deemphasis : 1;
32 unsigned int amp_on : 1;
33 };
34
35
36 /*
37 * initialize / detect DACA
38 */
daca_init_client(struct pmac_keywest * i2c)39 static int daca_init_client(struct pmac_keywest *i2c)
40 {
41 unsigned short wdata = 0x00;
42 /* SR: no swap, 1bit delay, 32-48kHz */
43 /* GCFG: power amp inverted, DAC on */
44 if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
45 i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
46 return -EINVAL;
47 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
48 2, (unsigned char*)&wdata);
49 }
50
51 /*
52 * update volume
53 */
daca_set_volume(struct pmac_daca * mix)54 static int daca_set_volume(struct pmac_daca *mix)
55 {
56 unsigned char data[2];
57
58 if (! mix->i2c.client)
59 return -ENODEV;
60
61 if (mix->left_vol > DACA_VOL_MAX)
62 data[0] = DACA_VOL_MAX;
63 else
64 data[0] = mix->left_vol;
65 if (mix->right_vol > DACA_VOL_MAX)
66 data[1] = DACA_VOL_MAX;
67 else
68 data[1] = mix->right_vol;
69 data[1] |= mix->deemphasis ? 0x40 : 0;
70 if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
71 2, data) < 0) {
72 snd_printk(KERN_ERR "failed to set volume \n");
73 return -EINVAL;
74 }
75 return 0;
76 }
77
78
79 /* deemphasis switch */
80 #define daca_info_deemphasis snd_ctl_boolean_mono_info
81
daca_get_deemphasis(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)82 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
83 struct snd_ctl_elem_value *ucontrol)
84 {
85 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
86 struct pmac_daca *mix;
87 if (! (mix = chip->mixer_data))
88 return -ENODEV;
89 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
90 return 0;
91 }
92
daca_put_deemphasis(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)93 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
95 {
96 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
97 struct pmac_daca *mix;
98 int change;
99
100 if (! (mix = chip->mixer_data))
101 return -ENODEV;
102 change = mix->deemphasis != ucontrol->value.integer.value[0];
103 if (change) {
104 mix->deemphasis = !!ucontrol->value.integer.value[0];
105 daca_set_volume(mix);
106 }
107 return change;
108 }
109
110 /* output volume */
daca_info_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * uinfo)111 static int daca_info_volume(struct snd_kcontrol *kcontrol,
112 struct snd_ctl_elem_info *uinfo)
113 {
114 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
115 uinfo->count = 2;
116 uinfo->value.integer.min = 0;
117 uinfo->value.integer.max = DACA_VOL_MAX;
118 return 0;
119 }
120
daca_get_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)121 static int daca_get_volume(struct snd_kcontrol *kcontrol,
122 struct snd_ctl_elem_value *ucontrol)
123 {
124 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
125 struct pmac_daca *mix;
126 if (! (mix = chip->mixer_data))
127 return -ENODEV;
128 ucontrol->value.integer.value[0] = mix->left_vol;
129 ucontrol->value.integer.value[1] = mix->right_vol;
130 return 0;
131 }
132
daca_put_volume(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)133 static int daca_put_volume(struct snd_kcontrol *kcontrol,
134 struct snd_ctl_elem_value *ucontrol)
135 {
136 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
137 struct pmac_daca *mix;
138 unsigned int vol[2];
139 int change;
140
141 if (! (mix = chip->mixer_data))
142 return -ENODEV;
143 vol[0] = ucontrol->value.integer.value[0];
144 vol[1] = ucontrol->value.integer.value[1];
145 if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
146 return -EINVAL;
147 change = mix->left_vol != vol[0] ||
148 mix->right_vol != vol[1];
149 if (change) {
150 mix->left_vol = vol[0];
151 mix->right_vol = vol[1];
152 daca_set_volume(mix);
153 }
154 return change;
155 }
156
157 /* amplifier switch */
158 #define daca_info_amp daca_info_deemphasis
159
daca_get_amp(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)160 static int daca_get_amp(struct snd_kcontrol *kcontrol,
161 struct snd_ctl_elem_value *ucontrol)
162 {
163 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
164 struct pmac_daca *mix;
165 if (! (mix = chip->mixer_data))
166 return -ENODEV;
167 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
168 return 0;
169 }
170
daca_put_amp(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)171 static int daca_put_amp(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
173 {
174 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
175 struct pmac_daca *mix;
176 int change;
177
178 if (! (mix = chip->mixer_data))
179 return -ENODEV;
180 change = mix->amp_on != ucontrol->value.integer.value[0];
181 if (change) {
182 mix->amp_on = !!ucontrol->value.integer.value[0];
183 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
184 mix->amp_on ? 0x05 : 0x04);
185 }
186 return change;
187 }
188
189 static const struct snd_kcontrol_new daca_mixers[] = {
190 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
191 .name = "Deemphasis Switch",
192 .info = daca_info_deemphasis,
193 .get = daca_get_deemphasis,
194 .put = daca_put_deemphasis
195 },
196 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
197 .name = "Master Playback Volume",
198 .info = daca_info_volume,
199 .get = daca_get_volume,
200 .put = daca_put_volume
201 },
202 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
203 .name = "Power Amplifier Switch",
204 .info = daca_info_amp,
205 .get = daca_get_amp,
206 .put = daca_put_amp
207 },
208 };
209
210
211 #ifdef CONFIG_PM
daca_resume(struct snd_pmac * chip)212 static void daca_resume(struct snd_pmac *chip)
213 {
214 struct pmac_daca *mix = chip->mixer_data;
215 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
216 i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
217 mix->amp_on ? 0x05 : 0x04);
218 daca_set_volume(mix);
219 }
220 #endif /* CONFIG_PM */
221
222
daca_cleanup(struct snd_pmac * chip)223 static void daca_cleanup(struct snd_pmac *chip)
224 {
225 struct pmac_daca *mix = chip->mixer_data;
226 if (! mix)
227 return;
228 snd_pmac_keywest_cleanup(&mix->i2c);
229 kfree(mix);
230 chip->mixer_data = NULL;
231 }
232
233 /* exported */
snd_pmac_daca_init(struct snd_pmac * chip)234 int snd_pmac_daca_init(struct snd_pmac *chip)
235 {
236 int i, err;
237 struct pmac_daca *mix;
238
239 request_module("i2c-powermac");
240
241 mix = kzalloc(sizeof(*mix), GFP_KERNEL);
242 if (! mix)
243 return -ENOMEM;
244 chip->mixer_data = mix;
245 chip->mixer_free = daca_cleanup;
246 mix->amp_on = 1; /* default on */
247
248 mix->i2c.addr = DACA_I2C_ADDR;
249 mix->i2c.init_client = daca_init_client;
250 mix->i2c.name = "DACA";
251 if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
252 return err;
253
254 /*
255 * build mixers
256 */
257 strcpy(chip->card->mixername, "PowerMac DACA");
258
259 for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) {
260 if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&daca_mixers[i], chip))) < 0)
261 return err;
262 }
263
264 #ifdef CONFIG_PM
265 chip->resume = daca_resume;
266 #endif
267
268 return 0;
269 }
270