2 * MFD driver for twl4030 codec submodule
4 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
6 * Copyright: (C) 2009 Nokia Corporation
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/module.h>
25 #include <linux/types.h>
26 #include <linux/kernel.h>
28 #include <linux/platform_device.h>
29 #include <linux/i2c/twl.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/twl4030-codec.h>
33 #define TWL4030_CODEC_CELLS 2
35 static struct platform_device
*twl4030_codec_dev
;
37 struct twl4030_codec_resource
{
43 struct twl4030_codec
{
44 unsigned int audio_mclk
;
46 struct twl4030_codec_resource resource
[TWL4030_CODEC_RES_MAX
];
47 struct mfd_cell cells
[TWL4030_CODEC_CELLS
];
51 * Modify the resource, the function returns the content of the register
52 * after the modification.
54 static int twl4030_codec_set_resource(enum twl4030_codec_res id
, int enable
)
56 struct twl4030_codec
*codec
= platform_get_drvdata(twl4030_codec_dev
);
59 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE
, &val
,
60 codec
->resource
[id
].reg
);
63 val
|= codec
->resource
[id
].mask
;
65 val
&= ~codec
->resource
[id
].mask
;
67 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE
,
68 val
, codec
->resource
[id
].reg
);
73 static inline int twl4030_codec_get_resource(enum twl4030_codec_res id
)
75 struct twl4030_codec
*codec
= platform_get_drvdata(twl4030_codec_dev
);
78 twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE
, &val
,
79 codec
->resource
[id
].reg
);
85 * Enable the resource.
86 * The function returns with error or the content of the register
88 int twl4030_codec_enable_resource(enum twl4030_codec_res id
)
90 struct twl4030_codec
*codec
= platform_get_drvdata(twl4030_codec_dev
);
93 if (id
>= TWL4030_CODEC_RES_MAX
) {
94 dev_err(&twl4030_codec_dev
->dev
,
95 "Invalid resource ID (%u)\n", id
);
99 mutex_lock(&codec
->mutex
);
100 if (!codec
->resource
[id
].request_count
)
101 /* Resource was disabled, enable it */
102 val
= twl4030_codec_set_resource(id
, 1);
104 val
= twl4030_codec_get_resource(id
);
106 codec
->resource
[id
].request_count
++;
107 mutex_unlock(&codec
->mutex
);
111 EXPORT_SYMBOL_GPL(twl4030_codec_enable_resource
);
114 * Disable the resource.
115 * The function returns with error or the content of the register
117 int twl4030_codec_disable_resource(unsigned id
)
119 struct twl4030_codec
*codec
= platform_get_drvdata(twl4030_codec_dev
);
122 if (id
>= TWL4030_CODEC_RES_MAX
) {
123 dev_err(&twl4030_codec_dev
->dev
,
124 "Invalid resource ID (%u)\n", id
);
128 mutex_lock(&codec
->mutex
);
129 if (!codec
->resource
[id
].request_count
) {
130 dev_err(&twl4030_codec_dev
->dev
,
131 "Resource has been disabled already (%u)\n", id
);
132 mutex_unlock(&codec
->mutex
);
135 codec
->resource
[id
].request_count
--;
137 if (!codec
->resource
[id
].request_count
)
138 /* Resource can be disabled now */
139 val
= twl4030_codec_set_resource(id
, 0);
141 val
= twl4030_codec_get_resource(id
);
143 mutex_unlock(&codec
->mutex
);
147 EXPORT_SYMBOL_GPL(twl4030_codec_disable_resource
);
149 unsigned int twl4030_codec_get_mclk(void)
151 struct twl4030_codec
*codec
= platform_get_drvdata(twl4030_codec_dev
);
153 return codec
->audio_mclk
;
155 EXPORT_SYMBOL_GPL(twl4030_codec_get_mclk
);
157 static int __devinit
twl4030_codec_probe(struct platform_device
*pdev
)
159 struct twl4030_codec
*codec
;
160 struct twl4030_codec_data
*pdata
= pdev
->dev
.platform_data
;
161 struct mfd_cell
*cell
= NULL
;
166 dev_err(&pdev
->dev
, "Platform data is missing\n");
170 /* Configure APLL_INFREQ and disable APLL if enabled */
172 switch (pdata
->audio_mclk
) {
174 val
|= TWL4030_APLL_INFREQ_19200KHZ
;
177 val
|= TWL4030_APLL_INFREQ_26000KHZ
;
180 val
|= TWL4030_APLL_INFREQ_38400KHZ
;
183 dev_err(&pdev
->dev
, "Invalid audio_mclk\n");
186 twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE
,
187 val
, TWL4030_REG_APLL_CTL
);
189 codec
= kzalloc(sizeof(struct twl4030_codec
), GFP_KERNEL
);
193 platform_set_drvdata(pdev
, codec
);
195 twl4030_codec_dev
= pdev
;
196 mutex_init(&codec
->mutex
);
197 codec
->audio_mclk
= pdata
->audio_mclk
;
200 codec
->resource
[TWL4030_CODEC_RES_POWER
].reg
= TWL4030_REG_CODEC_MODE
;
201 codec
->resource
[TWL4030_CODEC_RES_POWER
].mask
= TWL4030_CODECPDZ
;
204 codec
->resource
[TWL4030_CODEC_RES_APLL
].reg
= TWL4030_REG_APLL_CTL
;
205 codec
->resource
[TWL4030_CODEC_RES_APLL
].mask
= TWL4030_APLL_EN
;
208 cell
= &codec
->cells
[childs
];
209 cell
->name
= "twl4030_codec_audio";
210 cell
->platform_data
= pdata
->audio
;
211 cell
->data_size
= sizeof(*pdata
->audio
);
215 cell
= &codec
->cells
[childs
];
216 cell
->name
= "twl4030_codec_vibra";
217 cell
->platform_data
= pdata
->vibra
;
218 cell
->data_size
= sizeof(*pdata
->vibra
);
223 ret
= mfd_add_devices(&pdev
->dev
, pdev
->id
, codec
->cells
,
226 dev_err(&pdev
->dev
, "No platform data found for childs\n");
233 platform_set_drvdata(pdev
, NULL
);
235 twl4030_codec_dev
= NULL
;
239 static int __devexit
twl4030_codec_remove(struct platform_device
*pdev
)
241 struct twl4030_codec
*codec
= platform_get_drvdata(pdev
);
243 mfd_remove_devices(&pdev
->dev
);
244 platform_set_drvdata(pdev
, NULL
);
246 twl4030_codec_dev
= NULL
;
251 MODULE_ALIAS("platform:twl4030_codec");
253 static struct platform_driver twl4030_codec_driver
= {
254 .probe
= twl4030_codec_probe
,
255 .remove
= __devexit_p(twl4030_codec_remove
),
257 .owner
= THIS_MODULE
,
258 .name
= "twl4030_codec",
262 static int __devinit
twl4030_codec_init(void)
264 return platform_driver_register(&twl4030_codec_driver
);
266 module_init(twl4030_codec_init
);
268 static void __devexit
twl4030_codec_exit(void)
270 platform_driver_unregister(&twl4030_codec_driver
);
272 module_exit(twl4030_codec_exit
);
274 MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@nokia.com>");
275 MODULE_LICENSE("GPL");