1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PMac DACA lowlevel functions
5 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
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>
17 #define DACA_I2C_ADDR 0x4d
20 #define DACA_REG_SR 0x01
21 #define DACA_REG_AVOL 0x02
22 #define DACA_REG_GCFG 0x03
24 /* maximum volume value */
25 #define DACA_VOL_MAX 0x38
29 struct pmac_keywest i2c;
30 int left_vol, right_vol;
31 unsigned int deemphasis : 1;
32 unsigned int amp_on : 1;
37 * initialize / detect DACA
39 static int daca_init_client(struct pmac_keywest *i2c)
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)
47 return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
48 2, (unsigned char*)&wdata);
54 static int daca_set_volume(struct pmac_daca *mix)
56 unsigned char data[2];
58 if (! mix->i2c.client)
61 if (mix->left_vol > DACA_VOL_MAX)
62 data[0] = DACA_VOL_MAX;
64 data[0] = mix->left_vol;
65 if (mix->right_vol > DACA_VOL_MAX)
66 data[1] = DACA_VOL_MAX;
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,
72 snd_printk(KERN_ERR "failed to set volume \n");
79 /* deemphasis switch */
80 #define daca_info_deemphasis snd_ctl_boolean_mono_info
82 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
83 struct snd_ctl_elem_value *ucontrol)
85 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
86 struct pmac_daca *mix;
87 if (! (mix = chip->mixer_data))
89 ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
93 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
96 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
97 struct pmac_daca *mix;
100 if (! (mix = chip->mixer_data))
102 change = mix->deemphasis != ucontrol->value.integer.value[0];
104 mix->deemphasis = !!ucontrol->value.integer.value[0];
105 daca_set_volume(mix);
111 static int daca_info_volume(struct snd_kcontrol *kcontrol,
112 struct snd_ctl_elem_info *uinfo)
114 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
116 uinfo->value.integer.min = 0;
117 uinfo->value.integer.max = DACA_VOL_MAX;
121 static int daca_get_volume(struct snd_kcontrol *kcontrol,
122 struct snd_ctl_elem_value *ucontrol)
124 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
125 struct pmac_daca *mix;
126 if (! (mix = chip->mixer_data))
128 ucontrol->value.integer.value[0] = mix->left_vol;
129 ucontrol->value.integer.value[1] = mix->right_vol;
133 static int daca_put_volume(struct snd_kcontrol *kcontrol,
134 struct snd_ctl_elem_value *ucontrol)
136 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
137 struct pmac_daca *mix;
141 if (! (mix = chip->mixer_data))
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)
147 change = mix->left_vol != vol[0] ||
148 mix->right_vol != vol[1];
150 mix->left_vol = vol[0];
151 mix->right_vol = vol[1];
152 daca_set_volume(mix);
157 /* amplifier switch */
158 #define daca_info_amp daca_info_deemphasis
160 static int daca_get_amp(struct snd_kcontrol *kcontrol,
161 struct snd_ctl_elem_value *ucontrol)
163 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
164 struct pmac_daca *mix;
165 if (! (mix = chip->mixer_data))
167 ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
171 static int daca_put_amp(struct snd_kcontrol *kcontrol,
172 struct snd_ctl_elem_value *ucontrol)
174 struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
175 struct pmac_daca *mix;
178 if (! (mix = chip->mixer_data))
180 change = mix->amp_on != ucontrol->value.integer.value[0];
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);
189 static 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
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
202 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
203 .name = "Power Amplifier Switch",
204 .info = daca_info_amp,
212 static void daca_resume(struct snd_pmac *chip)
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);
220 #endif /* CONFIG_PM */
223 static void daca_cleanup(struct snd_pmac *chip)
225 struct pmac_daca *mix = chip->mixer_data;
228 snd_pmac_keywest_cleanup(&mix->i2c);
230 chip->mixer_data = NULL;
234 int snd_pmac_daca_init(struct snd_pmac *chip)
237 struct pmac_daca *mix;
239 request_module("i2c-powermac");
241 mix = kzalloc(sizeof(*mix), GFP_KERNEL);
244 chip->mixer_data = mix;
245 chip->mixer_free = daca_cleanup;
246 mix->amp_on = 1; /* default on */
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)
257 strcpy(chip->card->mixername, "PowerMac DACA");
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)
265 chip->resume = daca_resume;