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 | */ |
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(client: i2c->client, DACA_REG_SR, value: 0x08) < 0 || |
45 | i2c_smbus_write_byte_data(client: i2c->client, DACA_REG_GCFG, value: 0x05) < 0) |
46 | return -EINVAL; |
47 | return i2c_smbus_write_block_data(client: i2c->client, DACA_REG_AVOL, |
48 | length: 2, values: (unsigned char*)&wdata); |
49 | } |
50 | |
51 | /* |
52 | * update volume |
53 | */ |
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(client: mix->i2c.client, DACA_REG_AVOL, |
71 | length: 2, values: 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 | |
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 | mix = chip->mixer_data; |
88 | if (!mix) |
89 | return -ENODEV; |
90 | ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0; |
91 | return 0; |
92 | } |
93 | |
94 | static int daca_put_deemphasis(struct snd_kcontrol *kcontrol, |
95 | struct snd_ctl_elem_value *ucontrol) |
96 | { |
97 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
98 | struct pmac_daca *mix; |
99 | int change; |
100 | |
101 | mix = chip->mixer_data; |
102 | if (!mix) |
103 | return -ENODEV; |
104 | change = mix->deemphasis != ucontrol->value.integer.value[0]; |
105 | if (change) { |
106 | mix->deemphasis = !!ucontrol->value.integer.value[0]; |
107 | daca_set_volume(mix); |
108 | } |
109 | return change; |
110 | } |
111 | |
112 | /* output volume */ |
113 | static int daca_info_volume(struct snd_kcontrol *kcontrol, |
114 | struct snd_ctl_elem_info *uinfo) |
115 | { |
116 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
117 | uinfo->count = 2; |
118 | uinfo->value.integer.min = 0; |
119 | uinfo->value.integer.max = DACA_VOL_MAX; |
120 | return 0; |
121 | } |
122 | |
123 | static int daca_get_volume(struct snd_kcontrol *kcontrol, |
124 | struct snd_ctl_elem_value *ucontrol) |
125 | { |
126 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
127 | struct pmac_daca *mix; |
128 | mix = chip->mixer_data; |
129 | if (!mix) |
130 | return -ENODEV; |
131 | ucontrol->value.integer.value[0] = mix->left_vol; |
132 | ucontrol->value.integer.value[1] = mix->right_vol; |
133 | return 0; |
134 | } |
135 | |
136 | static int daca_put_volume(struct snd_kcontrol *kcontrol, |
137 | struct snd_ctl_elem_value *ucontrol) |
138 | { |
139 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
140 | struct pmac_daca *mix; |
141 | unsigned int vol[2]; |
142 | int change; |
143 | |
144 | mix = chip->mixer_data; |
145 | if (!mix) |
146 | return -ENODEV; |
147 | vol[0] = ucontrol->value.integer.value[0]; |
148 | vol[1] = ucontrol->value.integer.value[1]; |
149 | if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX) |
150 | return -EINVAL; |
151 | change = mix->left_vol != vol[0] || |
152 | mix->right_vol != vol[1]; |
153 | if (change) { |
154 | mix->left_vol = vol[0]; |
155 | mix->right_vol = vol[1]; |
156 | daca_set_volume(mix); |
157 | } |
158 | return change; |
159 | } |
160 | |
161 | /* amplifier switch */ |
162 | #define daca_info_amp daca_info_deemphasis |
163 | |
164 | static int daca_get_amp(struct snd_kcontrol *kcontrol, |
165 | struct snd_ctl_elem_value *ucontrol) |
166 | { |
167 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
168 | struct pmac_daca *mix; |
169 | mix = chip->mixer_data; |
170 | if (!mix) |
171 | return -ENODEV; |
172 | ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0; |
173 | return 0; |
174 | } |
175 | |
176 | static int daca_put_amp(struct snd_kcontrol *kcontrol, |
177 | struct snd_ctl_elem_value *ucontrol) |
178 | { |
179 | struct snd_pmac *chip = snd_kcontrol_chip(kcontrol); |
180 | struct pmac_daca *mix; |
181 | int change; |
182 | |
183 | mix = chip->mixer_data; |
184 | if (!mix) |
185 | return -ENODEV; |
186 | change = mix->amp_on != ucontrol->value.integer.value[0]; |
187 | if (change) { |
188 | mix->amp_on = !!ucontrol->value.integer.value[0]; |
189 | i2c_smbus_write_byte_data(client: mix->i2c.client, DACA_REG_GCFG, |
190 | value: mix->amp_on ? 0x05 : 0x04); |
191 | } |
192 | return change; |
193 | } |
194 | |
195 | static const struct snd_kcontrol_new daca_mixers[] = { |
196 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
197 | .name = "Deemphasis Switch" , |
198 | .info = daca_info_deemphasis, |
199 | .get = daca_get_deemphasis, |
200 | .put = daca_put_deemphasis |
201 | }, |
202 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
203 | .name = "Master Playback Volume" , |
204 | .info = daca_info_volume, |
205 | .get = daca_get_volume, |
206 | .put = daca_put_volume |
207 | }, |
208 | { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
209 | .name = "Power Amplifier Switch" , |
210 | .info = daca_info_amp, |
211 | .get = daca_get_amp, |
212 | .put = daca_put_amp |
213 | }, |
214 | }; |
215 | |
216 | |
217 | #ifdef CONFIG_PM |
218 | static void daca_resume(struct snd_pmac *chip) |
219 | { |
220 | struct pmac_daca *mix = chip->mixer_data; |
221 | i2c_smbus_write_byte_data(client: mix->i2c.client, DACA_REG_SR, value: 0x08); |
222 | i2c_smbus_write_byte_data(client: mix->i2c.client, DACA_REG_GCFG, |
223 | value: mix->amp_on ? 0x05 : 0x04); |
224 | daca_set_volume(mix); |
225 | } |
226 | #endif /* CONFIG_PM */ |
227 | |
228 | |
229 | static void daca_cleanup(struct snd_pmac *chip) |
230 | { |
231 | struct pmac_daca *mix = chip->mixer_data; |
232 | if (! mix) |
233 | return; |
234 | snd_pmac_keywest_cleanup(i2c: &mix->i2c); |
235 | kfree(objp: mix); |
236 | chip->mixer_data = NULL; |
237 | } |
238 | |
239 | /* exported */ |
240 | int snd_pmac_daca_init(struct snd_pmac *chip) |
241 | { |
242 | int i, err; |
243 | struct pmac_daca *mix; |
244 | |
245 | request_module("i2c-powermac" ); |
246 | |
247 | mix = kzalloc(size: sizeof(*mix), GFP_KERNEL); |
248 | if (! mix) |
249 | return -ENOMEM; |
250 | chip->mixer_data = mix; |
251 | chip->mixer_free = daca_cleanup; |
252 | mix->amp_on = 1; /* default on */ |
253 | |
254 | mix->i2c.addr = DACA_I2C_ADDR; |
255 | mix->i2c.init_client = daca_init_client; |
256 | mix->i2c.name = "DACA" ; |
257 | err = snd_pmac_keywest_init(i2c: &mix->i2c); |
258 | if (err < 0) |
259 | return err; |
260 | |
261 | /* |
262 | * build mixers |
263 | */ |
264 | strcpy(p: chip->card->mixername, q: "PowerMac DACA" ); |
265 | |
266 | for (i = 0; i < ARRAY_SIZE(daca_mixers); i++) { |
267 | err = snd_ctl_add(card: chip->card, kcontrol: snd_ctl_new1(kcontrolnew: &daca_mixers[i], private_data: chip)); |
268 | if (err < 0) |
269 | return err; |
270 | } |
271 | |
272 | #ifdef CONFIG_PM |
273 | chip->resume = daca_resume; |
274 | #endif |
275 | |
276 | return 0; |
277 | } |
278 | |