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1/*
2 * Wolfson WM97xx -- Core device
3 *
4 * Copyright (C) 2017 Robert Jarzmik
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * Features:
12 * - an AC97 audio codec
13 * - a touchscreen driver
14 * - a GPIO block
15 */
16
17#include <linux/device.h>
18#include <linux/mfd/core.h>
19#include <linux/mfd/wm97xx.h>
20#include <linux/module.h>
21#include <linux/regmap.h>
22#include <linux/slab.h>
23#include <linux/wm97xx.h>
24#include <sound/ac97/codec.h>
25#include <sound/ac97/compat.h>
26
27#define WM9705_VENDOR_ID 0x574d4c05
28#define WM9712_VENDOR_ID 0x574d4c12
29#define WM9713_VENDOR_ID 0x574d4c13
30#define WM97xx_VENDOR_ID_MASK 0xffffffff
31
32struct wm97xx_priv {
33 struct regmap *regmap;
34 struct snd_ac97 *ac97;
35 struct device *dev;
36 struct wm97xx_platform_data codec_pdata;
37};
38
39static bool wm97xx_readable_reg(struct device *dev, unsigned int reg)
40{
41 switch (reg) {
42 case AC97_RESET ... AC97_PCM_SURR_DAC_RATE:
43 case AC97_PCM_LR_ADC_RATE:
44 case AC97_CENTER_LFE_MASTER:
45 case AC97_SPDIF ... AC97_LINE1_LEVEL:
46 case AC97_GPIO_CFG ... 0x5c:
47 case AC97_CODEC_CLASS_REV ... AC97_PCI_SID:
48 case 0x74 ... AC97_VENDOR_ID2:
49 return true;
50 default:
51 return false;
52 }
53}
54
55static bool wm97xx_writeable_reg(struct device *dev, unsigned int reg)
56{
57 switch (reg) {
58 case AC97_VENDOR_ID1:
59 case AC97_VENDOR_ID2:
60 return false;
61 default:
62 return wm97xx_readable_reg(dev, reg);
63 }
64}
65
66static const struct reg_default wm9705_reg_defaults[] = {
67 { 0x02, 0x8000 },
68 { 0x04, 0x8000 },
69 { 0x06, 0x8000 },
70 { 0x0a, 0x8000 },
71 { 0x0c, 0x8008 },
72 { 0x0e, 0x8008 },
73 { 0x10, 0x8808 },
74 { 0x12, 0x8808 },
75 { 0x14, 0x8808 },
76 { 0x16, 0x8808 },
77 { 0x18, 0x8808 },
78 { 0x1a, 0x0000 },
79 { 0x1c, 0x8000 },
80 { 0x20, 0x0000 },
81 { 0x22, 0x0000 },
82 { 0x26, 0x000f },
83 { 0x28, 0x0605 },
84 { 0x2a, 0x0000 },
85 { 0x2c, 0xbb80 },
86 { 0x32, 0xbb80 },
87 { 0x34, 0x2000 },
88 { 0x5a, 0x0000 },
89 { 0x5c, 0x0000 },
90 { 0x72, 0x0808 },
91 { 0x74, 0x0000 },
92 { 0x76, 0x0006 },
93 { 0x78, 0x0000 },
94 { 0x7a, 0x0000 },
95};
96
97static const struct regmap_config wm9705_regmap_config = {
98 .reg_bits = 16,
99 .reg_stride = 2,
100 .val_bits = 16,
101 .max_register = 0x7e,
102 .cache_type = REGCACHE_RBTREE,
103
104 .reg_defaults = wm9705_reg_defaults,
105 .num_reg_defaults = ARRAY_SIZE(wm9705_reg_defaults),
106 .volatile_reg = regmap_ac97_default_volatile,
107 .readable_reg = wm97xx_readable_reg,
108 .writeable_reg = wm97xx_writeable_reg,
109};
110
111static struct mfd_cell wm9705_cells[] = {
112 { .name = "wm9705-codec", },
113 { .name = "wm97xx-ts", },
114};
115
116static bool wm9712_volatile_reg(struct device *dev, unsigned int reg)
117{
118 switch (reg) {
119 case AC97_REC_GAIN:
120 return true;
121 default:
122 return regmap_ac97_default_volatile(dev, reg);
123 }
124}
125
126static const struct reg_default wm9712_reg_defaults[] = {
127 { 0x02, 0x8000 },
128 { 0x04, 0x8000 },
129 { 0x06, 0x8000 },
130 { 0x08, 0x0f0f },
131 { 0x0a, 0xaaa0 },
132 { 0x0c, 0xc008 },
133 { 0x0e, 0x6808 },
134 { 0x10, 0xe808 },
135 { 0x12, 0xaaa0 },
136 { 0x14, 0xad00 },
137 { 0x16, 0x8000 },
138 { 0x18, 0xe808 },
139 { 0x1a, 0x3000 },
140 { 0x1c, 0x8000 },
141 { 0x20, 0x0000 },
142 { 0x22, 0x0000 },
143 { 0x26, 0x000f },
144 { 0x28, 0x0605 },
145 { 0x2a, 0x0410 },
146 { 0x2c, 0xbb80 },
147 { 0x2e, 0xbb80 },
148 { 0x32, 0xbb80 },
149 { 0x34, 0x2000 },
150 { 0x4c, 0xf83e },
151 { 0x4e, 0xffff },
152 { 0x50, 0x0000 },
153 { 0x52, 0x0000 },
154 { 0x56, 0xf83e },
155 { 0x58, 0x0008 },
156 { 0x5c, 0x0000 },
157 { 0x60, 0xb032 },
158 { 0x62, 0x3e00 },
159 { 0x64, 0x0000 },
160 { 0x76, 0x0006 },
161 { 0x78, 0x0001 },
162 { 0x7a, 0x0000 },
163};
164
165static const struct regmap_config wm9712_regmap_config = {
166 .reg_bits = 16,
167 .reg_stride = 2,
168 .val_bits = 16,
169 .max_register = 0x7e,
170 .cache_type = REGCACHE_RBTREE,
171
172 .reg_defaults = wm9712_reg_defaults,
173 .num_reg_defaults = ARRAY_SIZE(wm9712_reg_defaults),
174 .volatile_reg = wm9712_volatile_reg,
175 .readable_reg = wm97xx_readable_reg,
176 .writeable_reg = wm97xx_writeable_reg,
177};
178
179static struct mfd_cell wm9712_cells[] = {
180 { .name = "wm9712-codec", },
181 { .name = "wm97xx-ts", },
182};
183
184static const struct reg_default wm9713_reg_defaults[] = {
185 { 0x02, 0x8080 }, /* Speaker Output Volume */
186 { 0x04, 0x8080 }, /* Headphone Output Volume */
187 { 0x06, 0x8080 }, /* Out3/OUT4 Volume */
188 { 0x08, 0xc880 }, /* Mono Volume */
189 { 0x0a, 0xe808 }, /* LINEIN Volume */
190 { 0x0c, 0xe808 }, /* DAC PGA Volume */
191 { 0x0e, 0x0808 }, /* MIC PGA Volume */
192 { 0x10, 0x00da }, /* MIC Routing Control */
193 { 0x12, 0x8000 }, /* Record PGA Volume */
194 { 0x14, 0xd600 }, /* Record Routing */
195 { 0x16, 0xaaa0 }, /* PCBEEP Volume */
196 { 0x18, 0xaaa0 }, /* VxDAC Volume */
197 { 0x1a, 0xaaa0 }, /* AUXDAC Volume */
198 { 0x1c, 0x0000 }, /* Output PGA Mux */
199 { 0x1e, 0x0000 }, /* DAC 3D control */
200 { 0x20, 0x0f0f }, /* DAC Tone Control*/
201 { 0x22, 0x0040 }, /* MIC Input Select & Bias */
202 { 0x24, 0x0000 }, /* Output Volume Mapping & Jack */
203 { 0x26, 0x7f00 }, /* Powerdown Ctrl/Stat*/
204 { 0x28, 0x0405 }, /* Extended Audio ID */
205 { 0x2a, 0x0410 }, /* Extended Audio Start/Ctrl */
206 { 0x2c, 0xbb80 }, /* Audio DACs Sample Rate */
207 { 0x2e, 0xbb80 }, /* AUXDAC Sample Rate */
208 { 0x32, 0xbb80 }, /* Audio ADCs Sample Rate */
209 { 0x36, 0x4523 }, /* PCM codec control */
210 { 0x3a, 0x2000 }, /* SPDIF control */
211 { 0x3c, 0xfdff }, /* Powerdown 1 */
212 { 0x3e, 0xffff }, /* Powerdown 2 */
213 { 0x40, 0x0000 }, /* General Purpose */
214 { 0x42, 0x0000 }, /* Fast Power-Up Control */
215 { 0x44, 0x0080 }, /* MCLK/PLL Control */
216 { 0x46, 0x0000 }, /* MCLK/PLL Control */
217
218 { 0x4c, 0xfffe }, /* GPIO Pin Configuration */
219 { 0x4e, 0xffff }, /* GPIO Pin Polarity / Type */
220 { 0x50, 0x0000 }, /* GPIO Pin Sticky */
221 { 0x52, 0x0000 }, /* GPIO Pin Wake-Up */
222 /* GPIO Pin Status */
223 { 0x56, 0xfffe }, /* GPIO Pin Sharing */
224 { 0x58, 0x4000 }, /* GPIO PullUp/PullDown */
225 { 0x5a, 0x0000 }, /* Additional Functions 1 */
226 { 0x5c, 0x0000 }, /* Additional Functions 2 */
227 { 0x60, 0xb032 }, /* ALC Control */
228 { 0x62, 0x3e00 }, /* ALC / Noise Gate Control */
229 { 0x64, 0x0000 }, /* AUXDAC input control */
230 { 0x74, 0x0000 }, /* Digitiser Reg 1 */
231 { 0x76, 0x0006 }, /* Digitiser Reg 2 */
232 { 0x78, 0x0001 }, /* Digitiser Reg 3 */
233 { 0x7a, 0x0000 }, /* Digitiser Read Back */
234};
235
236static const struct regmap_config wm9713_regmap_config = {
237 .reg_bits = 16,
238 .reg_stride = 2,
239 .val_bits = 16,
240 .max_register = 0x7e,
241 .cache_type = REGCACHE_RBTREE,
242
243 .reg_defaults = wm9713_reg_defaults,
244 .num_reg_defaults = ARRAY_SIZE(wm9713_reg_defaults),
245 .volatile_reg = regmap_ac97_default_volatile,
246 .readable_reg = wm97xx_readable_reg,
247 .writeable_reg = wm97xx_writeable_reg,
248};
249
250static struct mfd_cell wm9713_cells[] = {
251 { .name = "wm9713-codec", },
252 { .name = "wm97xx-ts", },
253};
254
255static int wm97xx_ac97_probe(struct ac97_codec_device *adev)
256{
257 struct wm97xx_priv *wm97xx;
258 const struct regmap_config *config;
259 struct wm97xx_platform_data *codec_pdata;
260 struct mfd_cell *cells;
261 int ret = -ENODEV, nb_cells, i;
262 struct wm97xx_pdata *pdata = snd_ac97_codec_get_platdata(adev);
263
264 wm97xx = devm_kzalloc(ac97_codec_dev2dev(adev),
265 sizeof(*wm97xx), GFP_KERNEL);
266 if (!wm97xx)
267 return -ENOMEM;
268
269 wm97xx->dev = ac97_codec_dev2dev(adev);
270 wm97xx->ac97 = snd_ac97_compat_alloc(adev);
271 if (IS_ERR(wm97xx->ac97))
272 return PTR_ERR(wm97xx->ac97);
273
274
275 ac97_set_drvdata(adev, wm97xx);
276 dev_info(wm97xx->dev, "wm97xx core found, id=0x%x\n",
277 adev->vendor_id);
278
279 codec_pdata = &wm97xx->codec_pdata;
280 codec_pdata->ac97 = wm97xx->ac97;
281 codec_pdata->batt_pdata = pdata ? pdata->batt_pdata : NULL;
282
283 switch (adev->vendor_id) {
284 case WM9705_VENDOR_ID:
285 config = &wm9705_regmap_config;
286 cells = wm9705_cells;
287 nb_cells = ARRAY_SIZE(wm9705_cells);
288 break;
289 case WM9712_VENDOR_ID:
290 config = &wm9712_regmap_config;
291 cells = wm9712_cells;
292 nb_cells = ARRAY_SIZE(wm9712_cells);
293 break;
294 case WM9713_VENDOR_ID:
295 config = &wm9713_regmap_config;
296 cells = wm9713_cells;
297 nb_cells = ARRAY_SIZE(wm9713_cells);
298 break;
299 default:
300 goto err_free_compat;
301 }
302
303 for (i = 0; i < nb_cells; i++) {
304 cells[i].platform_data = codec_pdata;
305 cells[i].pdata_size = sizeof(*codec_pdata);
306 }
307
308 codec_pdata->regmap = devm_regmap_init_ac97(wm97xx->ac97, config);
309 if (IS_ERR(codec_pdata->regmap)) {
310 ret = PTR_ERR(codec_pdata->regmap);
311 goto err_free_compat;
312 }
313
314 ret = devm_mfd_add_devices(wm97xx->dev, PLATFORM_DEVID_NONE,
315 cells, nb_cells, NULL, 0, NULL);
316 if (ret)
317 goto err_free_compat;
318
319 return ret;
320
321err_free_compat:
322 snd_ac97_compat_release(wm97xx->ac97);
323 return ret;
324}
325
326static int wm97xx_ac97_remove(struct ac97_codec_device *adev)
327{
328 struct wm97xx_priv *wm97xx = ac97_get_drvdata(adev);
329
330 snd_ac97_compat_release(wm97xx->ac97);
331
332 return 0;
333}
334
335static const struct ac97_id wm97xx_ac97_ids[] = {
336 { .id = WM9705_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK },
337 { .id = WM9712_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK },
338 { .id = WM9713_VENDOR_ID, .mask = WM97xx_VENDOR_ID_MASK },
339 { }
340};
341
342static struct ac97_codec_driver wm97xx_ac97_driver = {
343 .driver = {
344 .name = "wm97xx-core",
345 },
346 .probe = wm97xx_ac97_probe,
347 .remove = wm97xx_ac97_remove,
348 .id_table = wm97xx_ac97_ids,
349};
350
351static int __init wm97xx_module_init(void)
352{
353 return snd_ac97_codec_driver_register(&wm97xx_ac97_driver);
354}
355module_init(wm97xx_module_init);
356
357static void __exit wm97xx_module_exit(void)
358{
359 snd_ac97_codec_driver_unregister(&wm97xx_ac97_driver);
360}
361module_exit(wm97xx_module_exit);
362
363MODULE_DESCRIPTION("WM9712, WM9713 core driver");
364MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
365MODULE_LICENSE("GPL");
366
367

Warning: That file was not part of the compilation database. It may have many parsing errors.