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1/*
2 * MFD driver for twl4030 audio submodule, which contains an audio codec, and
3 * the vibra control.
4 *
5 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
6 *
7 * Copyright: (C) 2009 Nokia Corporation
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
21 * 02110-1301 USA
22 *
23 */
24
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/i2c/twl.h>
32#include <linux/mfd/core.h>
33#include <linux/mfd/twl4030-audio.h>
34
35#define TWL4030_AUDIO_CELLS 2
36
37static struct platform_device *twl4030_audio_dev;
38
39struct twl4030_audio_resource {
40 int request_count;
41 u8 reg;
42 u8 mask;
43};
44
45struct twl4030_audio {
46 unsigned int audio_mclk;
47 struct mutex mutex;
48 struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
49 struct mfd_cell cells[TWL4030_AUDIO_CELLS];
50};
51
52/*
53 * Modify the resource, the function returns the content of the register
54 * after the modification.
55 */
56static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
57{
58 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
59 u8 val;
60
61 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
62 audio->resource[id].reg);
63
64 if (enable)
65 val |= audio->resource[id].mask;
66 else
67 val &= ~audio->resource[id].mask;
68
69 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
70 val, audio->resource[id].reg);
71
72 return val;
73}
74
75static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
76{
77 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
78 u8 val;
79
80 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
81 audio->resource[id].reg);
82
83 return val;
84}
85
86/*
87 * Enable the resource.
88 * The function returns with error or the content of the register
89 */
90int twl4030_audio_enable_resource(enum twl4030_audio_res id)
91{
92 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
93 int val;
94
95 if (id >= TWL4030_AUDIO_RES_MAX) {
96 dev_err(&twl4030_audio_dev->dev,
97 "Invalid resource ID (%u)\n", id);
98 return -EINVAL;
99 }
100
101 mutex_lock(&audio->mutex);
102 if (!audio->resource[id].request_count)
103 /* Resource was disabled, enable it */
104 val = twl4030_audio_set_resource(id, 1);
105 else
106 val = twl4030_audio_get_resource(id);
107
108 audio->resource[id].request_count++;
109 mutex_unlock(&audio->mutex);
110
111 return val;
112}
113EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
114
115/*
116 * Disable the resource.
117 * The function returns with error or the content of the register
118 */
119int twl4030_audio_disable_resource(unsigned id)
120{
121 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
122 int val;
123
124 if (id >= TWL4030_AUDIO_RES_MAX) {
125 dev_err(&twl4030_audio_dev->dev,
126 "Invalid resource ID (%u)\n", id);
127 return -EINVAL;
128 }
129
130 mutex_lock(&audio->mutex);
131 if (!audio->resource[id].request_count) {
132 dev_err(&twl4030_audio_dev->dev,
133 "Resource has been disabled already (%u)\n", id);
134 mutex_unlock(&audio->mutex);
135 return -EPERM;
136 }
137 audio->resource[id].request_count--;
138
139 if (!audio->resource[id].request_count)
140 /* Resource can be disabled now */
141 val = twl4030_audio_set_resource(id, 0);
142 else
143 val = twl4030_audio_get_resource(id);
144
145 mutex_unlock(&audio->mutex);
146
147 return val;
148}
149EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
150
151unsigned int twl4030_audio_get_mclk(void)
152{
153 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
154
155 return audio->audio_mclk;
156}
157EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
158
159static int __devinit twl4030_audio_probe(struct platform_device *pdev)
160{
161 struct twl4030_audio *audio;
162 struct twl4030_audio_data *pdata = pdev->dev.platform_data;
163 struct mfd_cell *cell = NULL;
164 int ret, childs = 0;
165 u8 val;
166
167 if (!pdata) {
168 dev_err(&pdev->dev, "Platform data is missing\n");
169 return -EINVAL;
170 }
171
172 /* Configure APLL_INFREQ and disable APLL if enabled */
173 val = 0;
174 switch (pdata->audio_mclk) {
175 case 19200000:
176 val |= TWL4030_APLL_INFREQ_19200KHZ;
177 break;
178 case 26000000:
179 val |= TWL4030_APLL_INFREQ_26000KHZ;
180 break;
181 case 38400000:
182 val |= TWL4030_APLL_INFREQ_38400KHZ;
183 break;
184 default:
185 dev_err(&pdev->dev, "Invalid audio_mclk\n");
186 return -EINVAL;
187 }
188 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
189 val, TWL4030_REG_APLL_CTL);
190
191 audio = kzalloc(sizeof(struct twl4030_audio), GFP_KERNEL);
192 if (!audio)
193 return -ENOMEM;
194
195 platform_set_drvdata(pdev, audio);
196
197 twl4030_audio_dev = pdev;
198 mutex_init(&audio->mutex);
199 audio->audio_mclk = pdata->audio_mclk;
200
201 /* Codec power */
202 audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
203 audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
204
205 /* PLL */
206 audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
207 audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
208
209 if (pdata->codec) {
210 cell = &audio->cells[childs];
211 cell->name = "twl4030-codec";
212 cell->platform_data = pdata->codec;
213 cell->pdata_size = sizeof(*pdata->codec);
214 childs++;
215 }
216 if (pdata->vibra) {
217 cell = &audio->cells[childs];
218 cell->name = "twl4030-vibra";
219 cell->platform_data = pdata->vibra;
220 cell->pdata_size = sizeof(*pdata->vibra);
221 childs++;
222 }
223
224 if (childs)
225 ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
226 childs, NULL, 0);
227 else {
228 dev_err(&pdev->dev, "No platform data found for childs\n");
229 ret = -ENODEV;
230 }
231
232 if (!ret)
233 return 0;
234
235 platform_set_drvdata(pdev, NULL);
236 kfree(audio);
237 twl4030_audio_dev = NULL;
238 return ret;
239}
240
241static int __devexit twl4030_audio_remove(struct platform_device *pdev)
242{
243 struct twl4030_audio *audio = platform_get_drvdata(pdev);
244
245 mfd_remove_devices(&pdev->dev);
246 platform_set_drvdata(pdev, NULL);
247 kfree(audio);
248 twl4030_audio_dev = NULL;
249
250 return 0;
251}
252
253MODULE_ALIAS("platform:twl4030-audio");
254
255static struct platform_driver twl4030_audio_driver = {
256 .probe = twl4030_audio_probe,
257 .remove = __devexit_p(twl4030_audio_remove),
258 .driver = {
259 .owner = THIS_MODULE,
260 .name = "twl4030-audio",
261 },
262};
263
264static int __devinit twl4030_audio_init(void)
265{
266 return platform_driver_register(&twl4030_audio_driver);
267}
268module_init(twl4030_audio_init);
269
270static void __devexit twl4030_audio_exit(void)
271{
272 platform_driver_unregister(&twl4030_audio_driver);
273}
274module_exit(twl4030_audio_exit);
275
276MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
277MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * MFD driver for twl4030 audio submodule, which contains an audio codec, and
4 * the vibra control.
5 *
6 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
7 *
8 * Copyright: (C) 2009 Nokia Corporation
9 */
10
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/slab.h>
14#include <linux/kernel.h>
15#include <linux/fs.h>
16#include <linux/platform_device.h>
17#include <linux/of.h>
18#include <linux/of_platform.h>
19#include <linux/mfd/twl.h>
20#include <linux/mfd/core.h>
21#include <linux/mfd/twl4030-audio.h>
22
23#define TWL4030_AUDIO_CELLS 2
24
25static struct platform_device *twl4030_audio_dev;
26
27struct twl4030_audio_resource {
28 int request_count;
29 u8 reg;
30 u8 mask;
31};
32
33struct twl4030_audio {
34 unsigned int audio_mclk;
35 struct mutex mutex;
36 struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
37 struct mfd_cell cells[TWL4030_AUDIO_CELLS];
38};
39
40/*
41 * Modify the resource, the function returns the content of the register
42 * after the modification.
43 */
44static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
45{
46 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
47 u8 val;
48
49 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
50 audio->resource[id].reg);
51
52 if (enable)
53 val |= audio->resource[id].mask;
54 else
55 val &= ~audio->resource[id].mask;
56
57 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
58 val, audio->resource[id].reg);
59
60 return val;
61}
62
63static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
64{
65 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
66 u8 val;
67
68 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
69 audio->resource[id].reg);
70
71 return val;
72}
73
74/*
75 * Enable the resource.
76 * The function returns with error or the content of the register
77 */
78int twl4030_audio_enable_resource(enum twl4030_audio_res id)
79{
80 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
81 int val;
82
83 if (id >= TWL4030_AUDIO_RES_MAX) {
84 dev_err(&twl4030_audio_dev->dev,
85 "Invalid resource ID (%u)\n", id);
86 return -EINVAL;
87 }
88
89 mutex_lock(&audio->mutex);
90 if (!audio->resource[id].request_count)
91 /* Resource was disabled, enable it */
92 val = twl4030_audio_set_resource(id, 1);
93 else
94 val = twl4030_audio_get_resource(id);
95
96 audio->resource[id].request_count++;
97 mutex_unlock(&audio->mutex);
98
99 return val;
100}
101EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
102
103/*
104 * Disable the resource.
105 * The function returns with error or the content of the register
106 */
107int twl4030_audio_disable_resource(enum twl4030_audio_res id)
108{
109 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
110 int val;
111
112 if (id >= TWL4030_AUDIO_RES_MAX) {
113 dev_err(&twl4030_audio_dev->dev,
114 "Invalid resource ID (%u)\n", id);
115 return -EINVAL;
116 }
117
118 mutex_lock(&audio->mutex);
119 if (!audio->resource[id].request_count) {
120 dev_err(&twl4030_audio_dev->dev,
121 "Resource has been disabled already (%u)\n", id);
122 mutex_unlock(&audio->mutex);
123 return -EPERM;
124 }
125 audio->resource[id].request_count--;
126
127 if (!audio->resource[id].request_count)
128 /* Resource can be disabled now */
129 val = twl4030_audio_set_resource(id, 0);
130 else
131 val = twl4030_audio_get_resource(id);
132
133 mutex_unlock(&audio->mutex);
134
135 return val;
136}
137EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
138
139unsigned int twl4030_audio_get_mclk(void)
140{
141 struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
142
143 return audio->audio_mclk;
144}
145EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
146
147static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
148 struct device_node *parent)
149{
150 struct device_node *node;
151
152 if (pdata && pdata->codec)
153 return true;
154
155 node = of_get_child_by_name(parent, "codec");
156 if (node) {
157 of_node_put(node);
158 return true;
159 }
160
161 return false;
162}
163
164static bool twl4030_audio_has_vibra(struct twl4030_audio_data *pdata,
165 struct device_node *node)
166{
167 int vibra;
168
169 if (pdata && pdata->vibra)
170 return true;
171
172 if (!of_property_read_u32(node, "ti,enable-vibra", &vibra) && vibra)
173 return true;
174
175 return false;
176}
177
178static int twl4030_audio_probe(struct platform_device *pdev)
179{
180 struct twl4030_audio *audio;
181 struct twl4030_audio_data *pdata = dev_get_platdata(&pdev->dev);
182 struct device_node *node = pdev->dev.of_node;
183 struct mfd_cell *cell = NULL;
184 int ret, childs = 0;
185 u8 val;
186
187 if (!pdata && !node) {
188 dev_err(&pdev->dev, "Platform data is missing\n");
189 return -EINVAL;
190 }
191
192 audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
193 GFP_KERNEL);
194 if (!audio)
195 return -ENOMEM;
196
197 mutex_init(&audio->mutex);
198 audio->audio_mclk = twl_get_hfclk_rate();
199
200 /* Configure APLL_INFREQ and disable APLL if enabled */
201 switch (audio->audio_mclk) {
202 case 19200000:
203 val = TWL4030_APLL_INFREQ_19200KHZ;
204 break;
205 case 26000000:
206 val = TWL4030_APLL_INFREQ_26000KHZ;
207 break;
208 case 38400000:
209 val = TWL4030_APLL_INFREQ_38400KHZ;
210 break;
211 default:
212 dev_err(&pdev->dev, "Invalid audio_mclk\n");
213 return -EINVAL;
214 }
215 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL);
216
217 /* Codec power */
218 audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
219 audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
220
221 /* PLL */
222 audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
223 audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
224
225 if (twl4030_audio_has_codec(pdata, node)) {
226 cell = &audio->cells[childs];
227 cell->name = "twl4030-codec";
228 if (pdata) {
229 cell->platform_data = pdata->codec;
230 cell->pdata_size = sizeof(*pdata->codec);
231 }
232 childs++;
233 }
234 if (twl4030_audio_has_vibra(pdata, node)) {
235 cell = &audio->cells[childs];
236 cell->name = "twl4030-vibra";
237 if (pdata) {
238 cell->platform_data = pdata->vibra;
239 cell->pdata_size = sizeof(*pdata->vibra);
240 }
241 childs++;
242 }
243
244 platform_set_drvdata(pdev, audio);
245 twl4030_audio_dev = pdev;
246
247 if (childs)
248 ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
249 childs, NULL, 0, NULL);
250 else {
251 dev_err(&pdev->dev, "No platform data found for childs\n");
252 ret = -ENODEV;
253 }
254
255 if (ret)
256 twl4030_audio_dev = NULL;
257
258 return ret;
259}
260
261static int twl4030_audio_remove(struct platform_device *pdev)
262{
263 mfd_remove_devices(&pdev->dev);
264 twl4030_audio_dev = NULL;
265
266 return 0;
267}
268
269static const struct of_device_id twl4030_audio_of_match[] = {
270 {.compatible = "ti,twl4030-audio", },
271 { },
272};
273MODULE_DEVICE_TABLE(of, twl4030_audio_of_match);
274
275static struct platform_driver twl4030_audio_driver = {
276 .driver = {
277 .name = "twl4030-audio",
278 .of_match_table = twl4030_audio_of_match,
279 },
280 .probe = twl4030_audio_probe,
281 .remove = twl4030_audio_remove,
282};
283
284module_platform_driver(twl4030_audio_driver);
285
286MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
287MODULE_DESCRIPTION("TWL4030 audio block MFD driver");
288MODULE_LICENSE("GPL");
289MODULE_ALIAS("platform:twl4030-audio");