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max9877.c
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1 /*
2  * max9877.c -- amp driver for max9877
3  *
4  * Copyright (C) 2009 Samsung Electronics Co.Ltd
5  * Author: Joonyoung Shim <[email protected]>
6  *
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.
11  *
12  */
13 
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>
19 
20 #include "max9877.h"
21 
22 static struct i2c_client *i2c;
23 
24 static u8 max9877_regs[5] = { 0x40, 0x00, 0x00, 0x00, 0x49 };
25 
26 static void max9877_write_regs(void)
27 {
28  unsigned int i;
29  u8 data[6];
30 
31  data[0] = MAX9877_INPUT_MODE;
32  for (i = 0; i < ARRAY_SIZE(max9877_regs); i++)
33  data[i + 1] = max9877_regs[i];
34 
35  if (i2c_master_send(i2c, data, 6) != 6)
36  dev_err(&i2c->dev, "i2c write failed\n");
37 }
38 
39 static int max9877_get_reg(struct snd_kcontrol *kcontrol,
40  struct snd_ctl_elem_value *ucontrol)
41 {
42  struct soc_mixer_control *mc =
43  (struct soc_mixer_control *)kcontrol->private_value;
44  unsigned int reg = mc->reg;
45  unsigned int shift = mc->shift;
46  unsigned int mask = mc->max;
47  unsigned int invert = mc->invert;
48 
49  ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
50 
51  if (invert)
52  ucontrol->value.integer.value[0] =
53  mask - ucontrol->value.integer.value[0];
54 
55  return 0;
56 }
57 
58 static int max9877_set_reg(struct snd_kcontrol *kcontrol,
59  struct snd_ctl_elem_value *ucontrol)
60 {
61  struct soc_mixer_control *mc =
62  (struct soc_mixer_control *)kcontrol->private_value;
63  unsigned int reg = mc->reg;
64  unsigned int shift = mc->shift;
65  unsigned int mask = mc->max;
66  unsigned int invert = mc->invert;
67  unsigned int val = (ucontrol->value.integer.value[0] & mask);
68 
69  if (invert)
70  val = mask - val;
71 
72  if (((max9877_regs[reg] >> shift) & mask) == val)
73  return 0;
74 
75  max9877_regs[reg] &= ~(mask << shift);
76  max9877_regs[reg] |= val << shift;
77  max9877_write_regs();
78 
79  return 1;
80 }
81 
82 static int max9877_get_2reg(struct snd_kcontrol *kcontrol,
83  struct snd_ctl_elem_value *ucontrol)
84 {
85  struct soc_mixer_control *mc =
86  (struct soc_mixer_control *)kcontrol->private_value;
87  unsigned int reg = mc->reg;
88  unsigned int reg2 = mc->rreg;
89  unsigned int shift = mc->shift;
90  unsigned int mask = mc->max;
91 
92  ucontrol->value.integer.value[0] = (max9877_regs[reg] >> shift) & mask;
93  ucontrol->value.integer.value[1] = (max9877_regs[reg2] >> shift) & mask;
94 
95  return 0;
96 }
97 
98 static int max9877_set_2reg(struct snd_kcontrol *kcontrol,
99  struct snd_ctl_elem_value *ucontrol)
100 {
101  struct soc_mixer_control *mc =
102  (struct soc_mixer_control *)kcontrol->private_value;
103  unsigned int reg = mc->reg;
104  unsigned int reg2 = mc->rreg;
105  unsigned int shift = mc->shift;
106  unsigned int mask = mc->max;
107  unsigned int val = (ucontrol->value.integer.value[0] & mask);
108  unsigned int val2 = (ucontrol->value.integer.value[1] & mask);
109  unsigned int change = 0;
110 
111  if (((max9877_regs[reg] >> shift) & mask) != val)
112  change = 1;
113 
114  if (((max9877_regs[reg2] >> shift) & mask) != val2)
115  change = 1;
116 
117  if (change) {
118  max9877_regs[reg] &= ~(mask << shift);
119  max9877_regs[reg] |= val << shift;
120  max9877_regs[reg2] &= ~(mask << shift);
121  max9877_regs[reg2] |= val2 << shift;
122  max9877_write_regs();
123  }
124 
125  return change;
126 }
127 
128 static int max9877_get_out_mode(struct snd_kcontrol *kcontrol,
129  struct snd_ctl_elem_value *ucontrol)
130 {
131  u8 value = max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK;
132 
133  if (value)
134  value -= 1;
135 
136  ucontrol->value.integer.value[0] = value;
137  return 0;
138 }
139 
140 static int max9877_set_out_mode(struct snd_kcontrol *kcontrol,
141  struct snd_ctl_elem_value *ucontrol)
142 {
143  u8 value = ucontrol->value.integer.value[0];
144 
145  value += 1;
146 
147  if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OUTMODE_MASK) == value)
148  return 0;
149 
150  max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OUTMODE_MASK;
151  max9877_regs[MAX9877_OUTPUT_MODE] |= value;
152  max9877_write_regs();
153  return 1;
154 }
155 
156 static int max9877_get_osc_mode(struct snd_kcontrol *kcontrol,
157  struct snd_ctl_elem_value *ucontrol)
158 {
159  u8 value = (max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK);
160 
161  value = value >> MAX9877_OSC_OFFSET;
162 
163  ucontrol->value.integer.value[0] = value;
164  return 0;
165 }
166 
167 static int max9877_set_osc_mode(struct snd_kcontrol *kcontrol,
168  struct snd_ctl_elem_value *ucontrol)
169 {
170  u8 value = ucontrol->value.integer.value[0];
171 
172  value = value << MAX9877_OSC_OFFSET;
173  if ((max9877_regs[MAX9877_OUTPUT_MODE] & MAX9877_OSC_MASK) == value)
174  return 0;
175 
176  max9877_regs[MAX9877_OUTPUT_MODE] &= ~MAX9877_OSC_MASK;
177  max9877_regs[MAX9877_OUTPUT_MODE] |= value;
178  max9877_write_regs();
179  return 1;
180 }
181 
182 static const unsigned int max9877_pgain_tlv[] = {
183  TLV_DB_RANGE_HEAD(2),
184  0, 1, TLV_DB_SCALE_ITEM(0, 900, 0),
185  2, 2, TLV_DB_SCALE_ITEM(2000, 0, 0),
186 };
187 
188 static const unsigned int max9877_output_tlv[] = {
189  TLV_DB_RANGE_HEAD(4),
190  0, 7, TLV_DB_SCALE_ITEM(-7900, 400, 1),
191  8, 15, TLV_DB_SCALE_ITEM(-4700, 300, 0),
192  16, 23, TLV_DB_SCALE_ITEM(-2300, 200, 0),
193  24, 31, TLV_DB_SCALE_ITEM(-700, 100, 0),
194 };
195 
196 static const char *max9877_out_mode[] = {
197  "INA -> SPK",
198  "INA -> HP",
199  "INA -> SPK and HP",
200  "INB -> SPK",
201  "INB -> HP",
202  "INB -> SPK and HP",
203  "INA + INB -> SPK",
204  "INA + INB -> HP",
205  "INA + INB -> SPK and HP",
206 };
207 
208 static const char *max9877_osc_mode[] = {
209  "1176KHz",
210  "1100KHz",
211  "700KHz",
212 };
213 
214 static const struct soc_enum max9877_enum[] = {
215  SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_out_mode), max9877_out_mode),
216  SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(max9877_osc_mode), max9877_osc_mode),
217 };
218 
219 static const struct snd_kcontrol_new max9877_controls[] = {
220  SOC_SINGLE_EXT_TLV("MAX9877 PGAINA Playback Volume",
221  MAX9877_INPUT_MODE, 0, 2, 0,
222  max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
223  SOC_SINGLE_EXT_TLV("MAX9877 PGAINB Playback Volume",
224  MAX9877_INPUT_MODE, 2, 2, 0,
225  max9877_get_reg, max9877_set_reg, max9877_pgain_tlv),
226  SOC_SINGLE_EXT_TLV("MAX9877 Amp Speaker Playback Volume",
227  MAX9877_SPK_VOLUME, 0, 31, 0,
228  max9877_get_reg, max9877_set_reg, max9877_output_tlv),
229  SOC_DOUBLE_R_EXT_TLV("MAX9877 Amp HP Playback Volume",
230  MAX9877_HPL_VOLUME, MAX9877_HPR_VOLUME, 0, 31, 0,
231  max9877_get_2reg, max9877_set_2reg, max9877_output_tlv),
232  SOC_SINGLE_EXT("MAX9877 INB Stereo Switch",
233  MAX9877_INPUT_MODE, 4, 1, 1,
234  max9877_get_reg, max9877_set_reg),
235  SOC_SINGLE_EXT("MAX9877 INA Stereo Switch",
236  MAX9877_INPUT_MODE, 5, 1, 1,
237  max9877_get_reg, max9877_set_reg),
238  SOC_SINGLE_EXT("MAX9877 Zero-crossing detection Switch",
239  MAX9877_INPUT_MODE, 6, 1, 0,
240  max9877_get_reg, max9877_set_reg),
241  SOC_SINGLE_EXT("MAX9877 Bypass Mode Switch",
242  MAX9877_OUTPUT_MODE, 6, 1, 0,
243  max9877_get_reg, max9877_set_reg),
244  SOC_SINGLE_EXT("MAX9877 Shutdown Mode Switch",
245  MAX9877_OUTPUT_MODE, 7, 1, 1,
246  max9877_get_reg, max9877_set_reg),
247  SOC_ENUM_EXT("MAX9877 Output Mode", max9877_enum[0],
248  max9877_get_out_mode, max9877_set_out_mode),
249  SOC_ENUM_EXT("MAX9877 Oscillator Mode", max9877_enum[1],
250  max9877_get_osc_mode, max9877_set_osc_mode),
251 };
252 
253 /* This function is called from ASoC machine driver */
254 int max9877_add_controls(struct snd_soc_codec *codec)
255 {
256  return snd_soc_add_codec_controls(codec, max9877_controls,
257  ARRAY_SIZE(max9877_controls));
258 }
259 EXPORT_SYMBOL_GPL(max9877_add_controls);
260 
261 static int __devinit max9877_i2c_probe(struct i2c_client *client,
262  const struct i2c_device_id *id)
263 {
264  i2c = client;
265 
266  max9877_write_regs();
267 
268  return 0;
269 }
270 
271 static __devexit int max9877_i2c_remove(struct i2c_client *client)
272 {
273  i2c = NULL;
274 
275  return 0;
276 }
277 
278 static const struct i2c_device_id max9877_i2c_id[] = {
279  { "max9877", 0 },
280  { }
281 };
282 MODULE_DEVICE_TABLE(i2c, max9877_i2c_id);
283 
284 static struct i2c_driver max9877_i2c_driver = {
285  .driver = {
286  .name = "max9877",
287  .owner = THIS_MODULE,
288  },
289  .probe = max9877_i2c_probe,
290  .remove = __devexit_p(max9877_i2c_remove),
291  .id_table = max9877_i2c_id,
292 };
293 
294 module_i2c_driver(max9877_i2c_driver);
295 
296 MODULE_DESCRIPTION("ASoC MAX9877 amp driver");
297 MODULE_AUTHOR("Joonyoung Shim <[email protected]>");
298 MODULE_LICENSE("GPL");
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