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25#include <linux/module.h>
26#include <linux/types.h>
27#include <linux/slab.h>
28#include <linux/kernel.h>
29#include <linux/fs.h>
30#include <linux/platform_device.h>
31#include <linux/of.h>
32#include <linux/of_platform.h>
33#include <linux/i2c/twl.h>
34#include <linux/mfd/core.h>
35#include <linux/mfd/twl4030-audio.h>
36
37#define TWL4030_AUDIO_CELLS 2
38
39static struct platform_device *twl4030_audio_dev;
40
41struct twl4030_audio_resource {
42 int request_count;
43 u8 reg;
44 u8 mask;
45};
46
47struct twl4030_audio {
48 unsigned int audio_mclk;
49 struct mutex mutex;
50 struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
51 struct mfd_cell cells[TWL4030_AUDIO_CELLS];
52};
53
54
55
56
57
58static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
59{
60 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
61 u8 val;
62
63 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
64 audio->resource[id].reg);
65
66 if (enable)
67 val |= audio->resource[id].mask;
68 else
69 val &= ~audio->resource[id].mask;
70
71 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
72 val, audio->resource[id].reg);
73
74 return val;
75}
76
77static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
78{
79 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
80 u8 val;
81
82 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
83 audio->resource[id].reg);
84
85 return val;
86}
87
88
89
90
91
92int twl4030_audio_enable_resource(enum twl4030_audio_res id)
93{
94 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
95 int val;
96
97 if (id >= TWL4030_AUDIO_RES_MAX) {
98 dev_err(&twl4030_audio_dev->dev,
99 "Invalid resource ID (%u)\n", id);
100 return -EINVAL;
101 }
102
103 mutex_lock(&audio->mutex);
104 if (!audio->resource[id].request_count)
105
106 val = twl4030_audio_set_resource(id, 1);
107 else
108 val = twl4030_audio_get_resource(id);
109
110 audio->resource[id].request_count++;
111 mutex_unlock(&audio->mutex);
112
113 return val;
114}
115EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
116
117
118
119
120
121int twl4030_audio_disable_resource(enum twl4030_audio_res id)
122{
123 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
124 int val;
125
126 if (id >= TWL4030_AUDIO_RES_MAX) {
127 dev_err(&twl4030_audio_dev->dev,
128 "Invalid resource ID (%u)\n", id);
129 return -EINVAL;
130 }
131
132 mutex_lock(&audio->mutex);
133 if (!audio->resource[id].request_count) {
134 dev_err(&twl4030_audio_dev->dev,
135 "Resource has been disabled already (%u)\n", id);
136 mutex_unlock(&audio->mutex);
137 return -EPERM;
138 }
139 audio->resource[id].request_count--;
140
141 if (!audio->resource[id].request_count)
142
143 val = twl4030_audio_set_resource(id, 0);
144 else
145 val = twl4030_audio_get_resource(id);
146
147 mutex_unlock(&audio->mutex);
148
149 return val;
150}
151EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
152
153unsigned int twl4030_audio_get_mclk(void)
154{
155 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
156
157 return audio->audio_mclk;
158}
159EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
160
161static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
162 struct device_node *node)
163{
164 if (pdata && pdata->codec)
165 return true;
166
167 if (of_find_node_by_name(node, "codec"))
168 return true;
169
170 return false;
171}
172
173static bool twl4030_audio_has_vibra(struct twl4030_audio_data *pdata,
174 struct device_node *node)
175{
176 int vibra;
177
178 if (pdata && pdata->vibra)
179 return true;
180
181 if (!of_property_read_u32(node, "ti,enable-vibra", &vibra) && vibra)
182 return true;
183
184 return false;
185}
186
187static int twl4030_audio_probe(struct platform_device *pdev)
188{
189 struct twl4030_audio *audio;
190 struct twl4030_audio_data *pdata = dev_get_platdata(&pdev->dev);
191 struct device_node *node = pdev->dev.of_node;
192 struct mfd_cell *cell = NULL;
193 int ret, childs = 0;
194 u8 val;
195
196 if (!pdata && !node) {
197 dev_err(&pdev->dev, "Platform data is missing\n");
198 return -EINVAL;
199 }
200
201 audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
202 GFP_KERNEL);
203 if (!audio)
204 return -ENOMEM;
205
206 mutex_init(&audio->mutex);
207 audio->audio_mclk = twl_get_hfclk_rate();
208
209
210 switch (audio->audio_mclk) {
211 case 19200000:
212 val = TWL4030_APLL_INFREQ_19200KHZ;
213 break;
214 case 26000000:
215 val = TWL4030_APLL_INFREQ_26000KHZ;
216 break;
217 case 38400000:
218 val = TWL4030_APLL_INFREQ_38400KHZ;
219 break;
220 default:
221 dev_err(&pdev->dev, "Invalid audio_mclk\n");
222 return -EINVAL;
223 }
224 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL);
225
226
227 audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
228 audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
229
230
231 audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
232 audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
233
234 if (twl4030_audio_has_codec(pdata, node)) {
235 cell = &audio->cells[childs];
236 cell->name = "twl4030-codec";
237 if (pdata) {
238 cell->platform_data = pdata->codec;
239 cell->pdata_size = sizeof(*pdata->codec);
240 }
241 childs++;
242 }
243 if (twl4030_audio_has_vibra(pdata, node)) {
244 cell = &audio->cells[childs];
245 cell->name = "twl4030-vibra";
246 if (pdata) {
247 cell->platform_data = pdata->vibra;
248 cell->pdata_size = sizeof(*pdata->vibra);
249 }
250 childs++;
251 }
252
253 platform_set_drvdata(pdev, audio);
254 twl4030_audio_dev = pdev;
255
256 if (childs)
257 ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
258 childs, NULL, 0, NULL);
259 else {
260 dev_err(&pdev->dev, "No platform data found for childs\n");
261 ret = -ENODEV;
262 }
263
264 if (ret)
265 twl4030_audio_dev = NULL;
266
267 return ret;
268}
269
270static int twl4030_audio_remove(struct platform_device *pdev)
271{
272 mfd_remove_devices(&pdev->dev);
273 twl4030_audio_dev = NULL;
274
275 return 0;
276}
277
278static const struct of_device_id twl4030_audio_of_match[] = {
279 {.compatible = "ti,twl4030-audio", },
280 { },
281};
282MODULE_DEVICE_TABLE(of, twl4030_audio_of_match);
283
284static struct platform_driver twl4030_audio_driver = {
285 .driver = {
286 .name = "twl4030-audio",
287 .of_match_table = twl4030_audio_of_match,
288 },
289 .probe = twl4030_audio_probe,
290 .remove = twl4030_audio_remove,
291};
292
293module_platform_driver(twl4030_audio_driver);
294
295MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
296MODULE_DESCRIPTION("TWL4030 audio block MFD driver");
297MODULE_LICENSE("GPL");
298MODULE_ALIAS("platform:twl4030-audio");
299
