2 * max9877.c -- amp driver for max9877
4 * Copyright (C) 2009 Samsung Electronics Co.Ltd
5 * Author: Joonyoung Shim <jy0922.shim@samsung.com>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/i2c.h>
17 #include <sound/soc.h>
18 #include <sound/tlv.h>
22 static struct i2c_client *i2c;
24 static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 };
26 static void max9877_write_regs(void)
28 if (i2c_master_send(i2c, max9877_regs, 5) != 5)
29 dev_err(&i2c->dev, "i2c write failed\n");
32 static int max9877_get_reg(struct snd_kcontrol *kcontrol,
33 struct snd_ctl_elem_value *ucontrol)
35 struct soc_mixer_control *mc =
36 (struct soc_mixer_control *)kcontrol->private_value;
37 unsigned int reg = mc->reg;
38 unsigned int shift = mc->shift;
39 unsigned int mask = mc->max;
40 unsigned int invert = mc->invert;
42 ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
45 ucontrol->value.integer.value[0] =
46 mask - ucontrol->value.integer.value[0];
51 static int max9877_set_reg(struct snd_kcontrol *kcontrol,
52 struct snd_ctl_elem_value *ucontrol)
54 struct soc_mixer_control *mc =
55 (struct soc_mixer_control *)kcontrol->private_value;
56 unsigned int reg = mc->reg;
57 unsigned int shift = mc->shift;
58 unsigned int mask = mc->max;
59 unsigned int invert = mc->invert;
60 unsigned int val = (ucontrol->value.integer.value[0] & mask);
65 if (((max9877_regs[reg] >> shift) & mask) == val)
68 max9877_regs[reg] &= ~(mask << shift);
69 max9877_regs[reg] |= val << shift;
75 static int max9877_get_2reg(struct snd_kcontrol *kcontrol,
76 struct snd_ctl_elem_value *ucontrol)
78 struct soc_mixer_control *mc =
79 (struct soc_mixer_control *)kcontrol->private_value;
80 unsigned int reg = mc->reg;
81 unsigned int reg2 = mc->rreg;
82 unsigned int shift = mc->shift;
83 unsigned int mask = mc->max;
85 ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
86 ucontrol->value.integer.value[1] = (max9877_regs[reg2] >> shift) & mask;
91 static int max9877_set_2reg(struct snd_kcontrol *kcontrol,
92 struct snd_ctl_elem_value *ucontrol)
94 struct soc_mixer_control *mc =
95 (struct soc_mixer_control *)kcontrol->private_value;
96 unsigned int reg = mc->reg;
97 unsigned int reg2 = mc->rreg;
98 unsigned int shift = mc->shift;
99 unsigned int mask = mc->max;
100 unsigned int val = (ucontrol->value.integer.value[0] & mask);
101 unsigned int val2 = (ucontrol->value.integer.value[1] & mask);
102 unsigned int change = 1;
104 if (((max9877_regs[reg] >> shift) & mask) == val)
107 if (((max9877_regs[reg2] >> shift) & mask) == val2)
111 max9877_regs[reg] &= ~(mask << shift);
112 max9877_regs[reg] |= val << shift;
113 max9877_regs[reg2] &= ~(mask << shift);
114 max9877_regs[reg2] |= val2 << shift;
115 max9877_write_regs();
121 static int max9877_get_out_mode(struct snd_kcontrol *kcontrol,
122 struct snd_ctl_elem_value *ucontrol)
124 u8 value = max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK;
129 ucontrol->value.integer.value[0] = value;
133 static int max9877_set_out_mode(struct snd_kcontrol *kcontrol,
134 struct snd_ctl_elem_value *ucontrol)
136 u8 value = ucontrol->value.integer.value[0];
141 if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value)
144 max9877_regs[MAX9877_OUTPUT_MODE] |= value;
145 max9877_write_regs();
149 static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol,
150 struct snd_ctl_elem_value *ucontrol)
152 u8 value = (max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK);
154 value = value >> MAX9877_OSC_OFFSET;
156 ucontrol->value.integer.value[0] = value;
160 static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol,
161 struct snd_ctl_elem_value *ucontrol)
163 u8 value = ucontrol->value.integer.value[0];
165 value = value << MAX9877_OSC_OFFSET;
166 if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value)
169 max9877_regs[MAX9877_OUTPUT_MODE] |= value;
170 max9877_write_regs();
174 static const unsigned int max9877_pgain_tlv[] = {
175 TLV_DB_RANGE_HEAD(2),
176 0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
177 2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
180 static const unsigned int max9877_output_tlv[] = {
181 TLV_DB_RANGE_HEAD(4),
182 0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
183 8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
184 16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
185 24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
188 static const char *max9877_out_mode[] = {
197 "INA + INB -> SPK and HP",
200 static const char *max9877_osc_mode[] = {
206 static const struct soc_enum max9877_enum[] = {
207 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode),
208 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
211 static const struct snd_kcontrol_new max9877_controls[] = {
212 SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume",
213 MAX9877_INPUT_MODE, 0, 2, 0,
214 max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
215 SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume",
216 MAX9877_INPUT_MODE, 2, 2, 0,
217 max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
218 SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume",
219 MAX9877_SPK_VOLUME, 0, 31, 0,
220 max9877_get_reg, max9877_set_reg, max9877_output_tlv),
221 SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume",
222 MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
223 max9877_get_2reg, max9877_set_2reg, max9877_output_tlv),
224 SOC_SINGLE_EXT("MAX9877 INB Stereo Switch",
225 MAX9877_INPUT_MODE, 4, 1, 1,
226 max9877_get_reg, max9877_set_reg),
227 SOC_SINGLE_EXT("MAX9877 INA Stereo Switch",
228 MAX9877_INPUT_MODE, 5, 1, 1,
229 max9877_get_reg, max9877_set_reg),
230 SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch",
231 MAX9877_INPUT_MODE, 6, 1, 0,
232 max9877_get_reg, max9877_set_reg),
233 SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch",
234 MAX9877_OUTPUT_MODE, 6, 1, 0,
235 max9877_get_reg, max9877_set_reg),
236 SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch",
237 MAX9877_OUTPUT_MODE, 7, 1, 1,
238 max9877_get_reg, max9877_set_reg),
239 SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0],
240 max9877_get_out_mode, max9877_set_out_mode),
241 SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1],
242 max9877_get_osc_mode, max9877_set_osc_mode),
245 /* This function is called from ASoC machine driver */
246 int max9877_add_controls(struct snd_soc_codec *codec)
248 return snd_soc_add_controls(codec, max9877_controls,
249 ARRAY_SIZE(max9877_controls));
251 EXPORT_SYMBOL_GPL(max9877_add_controls);
253 static int __devinit max9877_i2c_probe(struct i2c_client *client,
254 const struct i2c_device_id *id)
258 max9877_write_regs();
263 static __devexit int max9877_i2c_remove(struct i2c_client *client)
270 static const struct i2c_device_id max9877_i2c_id[] = {
274 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
276 static struct i2c_driver max9877_i2c_driver = {
279 .owner = THIS_MODULE,
281 .probe = max9877_i2c_probe,
282 .remove = __devexit_p(max9877_i2c_remove),
283 .id_table = max9877_i2c_id,
286 static int __init max9877_init(void)
288 return i2c_add_driver(&max9877_i2c_driver);
290 module_init(max9877_init);
292 static void __exit max9877_exit(void)
294 i2c_del_driver(&max9877_i2c_driver);
296 module_exit(max9877_exit);
298 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
299 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
300 MODULE_LICENSE("GPL");