[linux-2.6-block.git] / drivers / media / video / wm8739.c

/*
 * wm8739
 *
 * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
 *
 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
 * - Cleanup
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/videodev.h>
#include <media/v4l2-common.h>

MODULE_DESCRIPTION("wm8739 driver");
MODULE_AUTHOR("T. Adachi, Hans Verkuil");
MODULE_LICENSE("GPL");

static int debug = 0;
static unsigned short normal_i2c[] = { 0x34 >> 1, 0x36 >> 1, I2C_CLIENT_END };

module_param(debug, int, 0644);

MODULE_PARM_DESC(debug, "Debug level (0-1)");


I2C_CLIENT_INSMOD;

/* ------------------------------------------------------------------------ */

enum {
	R0 = 0, R1,
	R5 = 5, R6, R7, R8, R9, R15 = 15,
	TOT_REGS
};

struct wm8739_state {
	u32 clock_freq;
	u8 muted;
	u16 volume;
	u16 balance;
	u8 vol_l; 		/* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	u8 vol_r; 		/* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
};

/* ------------------------------------------------------------------------ */

static int wm8739_write(struct i2c_client *client, int reg, u16 val)
{
	int i;

	if (reg < 0 || reg >= TOT_REGS) {
		v4l_err(client, "Invalid register R%d\n", reg);
		return -1;
	}

	v4l_dbg(1, debug, client, "write: %02x %02x\n", reg, val);

	for (i = 0; i < 3; i++) {
		if (i2c_smbus_write_byte_data(client, (reg << 1) |
					(val >> 8), val & 0xff) == 0) {
			return 0;
		}
	}
	v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
	return -1;
}

/* write regs to set audio volume etc */
static void wm8739_set_audio(struct i2c_client *client)
{
	struct wm8739_state *state = i2c_get_clientdata(client);
	u16 mute = state->muted ? 0x80 : 0;

	/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
	 * Default setting: 0x17 = 0 dB
	 */
	wm8739_write(client, R0, (state->vol_l & 0x1f) | mute);
	wm8739_write(client, R1, (state->vol_r & 0x1f) | mute);
}

static int wm8739_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
	struct wm8739_state *state = i2c_get_clientdata(client);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = state->muted;
		break;

	case V4L2_CID_AUDIO_VOLUME:
		ctrl->value = state->volume;
		break;

	case V4L2_CID_AUDIO_BALANCE:
		ctrl->value = state->balance;
		break;

	default:
		return -EINVAL;
	}
	return 0;
}

static int wm8739_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
	struct wm8739_state *state = i2c_get_clientdata(client);
	unsigned int work_l, work_r;

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		state->muted = ctrl->value;
		break;

	case V4L2_CID_AUDIO_VOLUME:
		state->volume = ctrl->value;
		break;

	case V4L2_CID_AUDIO_BALANCE:
		state->balance = ctrl->value;
		break;

	default:
		return -EINVAL;
	}

	/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
	work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
	work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;

	state->vol_l = (long)work_l * 31 / 65535;
	state->vol_r = (long)work_r * 31 / 65535;

	/* set audio volume etc. */
	wm8739_set_audio(client);
	return 0;
}

/* ------------------------------------------------------------------------ */

static struct v4l2_queryctrl wm8739_qctrl[] = {
	{
		.id            = V4L2_CID_AUDIO_VOLUME,
		.name          = "Volume",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 58880,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	},{
		.id            = V4L2_CID_AUDIO_MUTE,
		.name          = "Mute",
		.minimum       = 0,
		.maximum       = 1,
		.step          = 1,
		.default_value = 1,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_BOOLEAN,
	},{
		.id            = V4L2_CID_AUDIO_BALANCE,
		.name          = "Balance",
		.minimum       = 0,
		.maximum       = 65535,
		.step          = 65535/100,
		.default_value = 32768,
		.flags         = 0,
		.type          = V4L2_CTRL_TYPE_INTEGER,
	}
};

/* ------------------------------------------------------------------------ */

static int wm8739_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct wm8739_state *state = i2c_get_clientdata(client);

	switch (cmd) {
	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
	{
		u32 audiofreq = *(u32 *)arg;

		state->clock_freq = audiofreq;
		wm8739_write(client, R9, 0x000);	/* de-activate */
		switch (audiofreq) {
		case 44100:
			wm8739_write(client, R8, 0x020); /* 256fps, fs=44.1k     */
			break;
		case 48000:
			wm8739_write(client, R8, 0x000); /* 256fps, fs=48k       */
			break;
		case 32000:
			wm8739_write(client, R8, 0x018); /* 256fps, fs=32k       */
			break;
		default:
			break;
		}
		wm8739_write(client, R9, 0x001);	/* activate */
		break;
	}

	case VIDIOC_G_CTRL:
		return wm8739_get_ctrl(client, arg);

	case VIDIOC_S_CTRL:
		return wm8739_set_ctrl(client, arg);

	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *qc = arg;
		int i;

		for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
			if (qc->id && qc->id == wm8739_qctrl[i].id) {
				memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
				return 0;
			}
		return -EINVAL;
	}

	case VIDIOC_LOG_STATUS:
		v4l_info(client, "Frequency: %u Hz\n", state->clock_freq);
		v4l_info(client, "Volume L:  %02x%s\n", state->vol_l & 0x1f,
				state->muted ? " (muted)" : "");
		v4l_info(client, "Volume R:  %02x%s\n", state->vol_r & 0x1f,
				state->muted ? " (muted)" : "");
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

/* ------------------------------------------------------------------------ */

/* i2c implementation */

static struct i2c_driver i2c_driver;

static int wm8739_attach(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	struct wm8739_state *state;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return 0;

	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == NULL)
		return -ENOMEM;

	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver;
	snprintf(client->name, sizeof(client->name) - 1, "wm8739");

	v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);

	state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
	if (state == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	state->vol_l = 0x17; /* 0dB */
	state->vol_r = 0x17; /* 0dB */
	state->muted = 0;
	state->balance = 32768;
	/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
	state->volume = ((long)state->vol_l + 1) * 65535 / 31;
	state->clock_freq = 48000;
	i2c_set_clientdata(client, state);

	/* initialize wm8739 */
	wm8739_write(client, R15, 0x00); /* reset */
	wm8739_write(client, R5, 0x000); /* filter setting, high path, offet clear */
	wm8739_write(client, R6, 0x000); /* ADC, OSC, Power Off mode Disable */
	wm8739_write(client, R7, 0x049); /* Digital Audio interface format */
					 /* Enable Master mode */
					 /* 24 bit, MSB first/left justified */
	wm8739_write(client, R8, 0x000); /* sampling control */
					 /* normal, 256fs, 48KHz sampling rate */
	wm8739_write(client, R9, 0x001); /* activate */
	wm8739_set_audio(client); 	 /* set volume/mute */

	i2c_attach_client(client);

	return 0;
}

static int wm8739_probe(struct i2c_adapter *adapter)
{
	if (adapter->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adapter, &addr_data, wm8739_attach);
	return 0;
}

static int wm8739_detach(struct i2c_client *client)
{
	int err;

	err = i2c_detach_client(client);
	if (err)
		return err;

	kfree(client);
	return 0;
}

/* ----------------------------------------------------------------------- */

/* i2c implementation */
static struct i2c_driver i2c_driver = {
	.driver = {
		.name = "wm8739",
	},
	.id = I2C_DRIVERID_WM8739,
	.attach_adapter = wm8739_probe,
	.detach_client  = wm8739_detach,
	.command = wm8739_command,
};


static int __init wm8739_init_module(void)
{
	return i2c_add_driver(&i2c_driver);
}

static void __exit wm8739_cleanup_module(void)
{
	i2c_del_driver(&i2c_driver);
}

module_init(wm8739_init_module);
module_exit(wm8739_cleanup_module);
Commit	Line	Data
75c4570c HV	1	/*
	2	* wm8739
	3	*
	4	* Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
	5	*
	6	* Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
	7	* - Cleanup
	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 as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22	*/
	23
	24	#include <linux/module.h>
	25	#include <linux/types.h>
	26	#include <linux/ioctl.h>
	27	#include <asm/uaccess.h>
	28	#include <linux/i2c.h>
	29	#include <linux/i2c-id.h>
	30	#include <linux/videodev.h>
	31	#include <media/v4l2-common.h>
	32
	33	MODULE_DESCRIPTION("wm8739 driver");
	34	MODULE_AUTHOR("T. Adachi, Hans Verkuil");
	35	MODULE_LICENSE("GPL");
	36
	37	static int debug = 0;
	38	static unsigned short normal_i2c[] = { 0x34 >> 1, 0x36 >> 1, I2C_CLIENT_END };
	39
	40	module_param(debug, int, 0644);
	41
	42	MODULE_PARM_DESC(debug, "Debug level (0-1)");
	43
	44
	45	I2C_CLIENT_INSMOD;
	46
	47	/* ------------------------------------------------------------------------ */
	48
	49	enum {
	50	R0 = 0, R1,
	51	R5 = 5, R6, R7, R8, R9, R15 = 15,
	52	TOT_REGS
	53	};
	54
	55	struct wm8739_state {
	56	u32 clock_freq;
	57	u8 muted;
	58	u16 volume;
	59	u16 balance;
	60	u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	61	u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
	62	};
	63
	64	/* ------------------------------------------------------------------------ */
65
66	static int wm8739_write(struct i2c_client *client, int reg, u16 val)
67	{
68	int i;
69
70	if (reg < 0 \|\| reg >= TOT_REGS) {
71	v4l_err(client, "Invalid register R%d\n", reg);
72	return -1;
73	}
74
75	v4l_dbg(1, debug, client, "write: %02x %02x\n", reg, val);
76
77	for (i = 0; i < 3; i++) {
78	if (i2c_smbus_write_byte_data(client, (reg << 1) \|
79	(val >> 8), val & 0xff) == 0) {
80	return 0;
81	}
82	}
83	v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
84	return -1;
85	}
86
87	/* write regs to set audio volume etc */
88	static void wm8739_set_audio(struct i2c_client *client)
89	{
90	struct wm8739_state *state = i2c_get_clientdata(client);
91	u16 mute = state->muted ? 0x80 : 0;
92
93	/* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
94	* Default setting: 0x17 = 0 dB
95	*/
96	wm8739_write(client, R0, (state->vol_l & 0x1f) \| mute);
97	wm8739_write(client, R1, (state->vol_r & 0x1f) \| mute);
98	}
99
100	static int wm8739_get_ctrl(struct i2c_client client, struct v4l2_control ctrl)
101	{
102	struct wm8739_state *state = i2c_get_clientdata(client);
103
104	switch (ctrl->id) {
105	case V4L2_CID_AUDIO_MUTE:
106	ctrl->value = state->muted;
107	break;
108
109	case V4L2_CID_AUDIO_VOLUME:
110	ctrl->value = state->volume;
111	break;
112
113	case V4L2_CID_AUDIO_BALANCE:
114	ctrl->value = state->balance;
115	break;
116
117	default:
118	return -EINVAL;
119	}
120	return 0;
121	}
122
123	static int wm8739_set_ctrl(struct i2c_client client, struct v4l2_control ctrl)
124	{
125	struct wm8739_state *state = i2c_get_clientdata(client);
126	unsigned int work_l, work_r;
127
128	switch (ctrl->id) {
129	case V4L2_CID_AUDIO_MUTE:
130	state->muted = ctrl->value;
131	break;
132
133	case V4L2_CID_AUDIO_VOLUME:
134	state->volume = ctrl->value;
135	break;
136
137	case V4L2_CID_AUDIO_BALANCE:
138	state->balance = ctrl->value;
139	break;
140
141	default:
142	return -EINVAL;
143	}
144
145	/* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
146	work_l = (min(65536 - state->balance, 32768) * state->volume) / 32768;
147	work_r = (min(state->balance, (u16)32768) * state->volume) / 32768;
148
149	state->vol_l = (long)work_l * 31 / 65535;
150	state->vol_r = (long)work_r * 31 / 65535;
151
152	/* set audio volume etc. */
153	wm8739_set_audio(client);
154	return 0;
155	}
156
157	/* ------------------------------------------------------------------------ */
158
159	static struct v4l2_queryctrl wm8739_qctrl[] = {
160	{
161	.id = V4L2_CID_AUDIO_VOLUME,
162	.name = "Volume",
163	.minimum = 0,
164	.maximum = 65535,
165	.step = 65535/100,
166	.default_value = 58880,
167	.flags = 0,
168	.type = V4L2_CTRL_TYPE_INTEGER,
169	},{
170	.id = V4L2_CID_AUDIO_MUTE,
171	.name = "Mute",
172	.minimum = 0,
173	.maximum = 1,
174	.step = 1,
175	.default_value = 1,
176	.flags = 0,
177	.type = V4L2_CTRL_TYPE_BOOLEAN,
178	},{
179	.id = V4L2_CID_AUDIO_BALANCE,
180	.name = "Balance",
181	.minimum = 0,
182	.maximum = 65535,
183	.step = 65535/100,
184	.default_value = 32768,
185	.flags = 0,
186	.type = V4L2_CTRL_TYPE_INTEGER,
187	}
188	};
189
190	/* ------------------------------------------------------------------------ */
191
192	static int wm8739_command(struct i2c_client client, unsigned int cmd, void arg)
193	{
194	struct wm8739_state *state = i2c_get_clientdata(client);
195
196	switch (cmd) {
197	case VIDIOC_INT_AUDIO_CLOCK_FREQ:
198	{
199	u32 audiofreq = (u32 )arg;
200
201	state->clock_freq = audiofreq;
202	wm8739_write(client, R9, 0x000); /* de-activate */
203	switch (audiofreq) {
204	case 44100:
205	wm8739_write(client, R8, 0x020); /* 256fps, fs=44.1k */
206	break;
207	case 48000:
208	wm8739_write(client, R8, 0x000); /* 256fps, fs=48k */
209	break;
210	case 32000:
211	wm8739_write(client, R8, 0x018); /* 256fps, fs=32k */
212	break;
213	default:
214	break;
215	}
216	wm8739_write(client, R9, 0x001); /* activate */
217	break;
218	}
219
220	case VIDIOC_G_CTRL:
221	return wm8739_get_ctrl(client, arg);
222
223	case VIDIOC_S_CTRL:
224	return wm8739_set_ctrl(client, arg);
225
226	case VIDIOC_QUERYCTRL:
227	{
228	struct v4l2_queryctrl *qc = arg;
229	int i;
230
231	for (i = 0; i < ARRAY_SIZE(wm8739_qctrl); i++)
232	if (qc->id && qc->id == wm8739_qctrl[i].id) {
233	memcpy(qc, &wm8739_qctrl[i], sizeof(*qc));
234	return 0;
235	}
236	return -EINVAL;
237	}
238
239	case VIDIOC_LOG_STATUS:
240	v4l_info(client, "Frequency: %u Hz\n", state->clock_freq);
241	v4l_info(client, "Volume L: %02x%s\n", state->vol_l & 0x1f,
242	state->muted ? " (muted)" : "");
243	v4l_info(client, "Volume R: %02x%s\n", state->vol_r & 0x1f,
244	state->muted ? " (muted)" : "");
245	break;
246
247	default:
248	return -EINVAL;
249	}
250
251	return 0;
252	}
253
254	/* ------------------------------------------------------------------------ */
255
256	/* i2c implementation */
257
258	static struct i2c_driver i2c_driver;
259
260	static int wm8739_attach(struct i2c_adapter *adapter, int address, int kind)
261	{
262	struct i2c_client *client;
263	struct wm8739_state *state;
264
265	/* Check if the adapter supports the needed features */
266	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
267	return 0;
268
269	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
270	if (client == NULL)
271	return -ENOMEM;
272
273	client->addr = address;
274	client->adapter = adapter;
275	client->driver = &i2c_driver;
276	snprintf(client->name, sizeof(client->name) - 1, "wm8739");
277
278	v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
279
280	state = kmalloc(sizeof(struct wm8739_state), GFP_KERNEL);
281	if (state == NULL) {
282	kfree(client);
283	return -ENOMEM;
284	}
285	state->vol_l = 0x17; /* 0dB */
286	state->vol_r = 0x17; /* 0dB */
287	state->muted = 0;
288	state->balance = 32768;
289	/* normalize (12dB(31) to -34.5dB(0) [0dB(23)] -> 65535 to 0) */
290	state->volume = ((long)state->vol_l + 1) * 65535 / 31;
291	state->clock_freq = 48000;
292	i2c_set_clientdata(client, state);
293
294	/* initialize wm8739 */
295	wm8739_write(client, R15, 0x00); /* reset */
296	wm8739_write(client, R5, 0x000); /* filter setting, high path, offet clear */
297	wm8739_write(client, R6, 0x000); /* ADC, OSC, Power Off mode Disable */
298	wm8739_write(client, R7, 0x049); /* Digital Audio interface format */
299	/* Enable Master mode */
300	/* 24 bit, MSB first/left justified */
301	wm8739_write(client, R8, 0x000); /* sampling control */
302	/* normal, 256fs, 48KHz sampling rate */
303	wm8739_write(client, R9, 0x001); /* activate */
304	wm8739_set_audio(client); /* set volume/mute */
305
306	i2c_attach_client(client);
307
308	return 0;
309	}
310
311	static int wm8739_probe(struct i2c_adapter *adapter)
312	{
313	if (adapter->class & I2C_CLASS_TV_ANALOG)
314	return i2c_probe(adapter, &addr_data, wm8739_attach);
315	return 0;
316	}
317
318	static int wm8739_detach(struct i2c_client *client)
319	{
320	int err;
321
322	err = i2c_detach_client(client);
323	if (err)
324	return err;
325
326	kfree(client);
327	return 0;
328	}
329
330	/* ----------------------------------------------------------------------- */
331
332	/* i2c implementation */
333	static struct i2c_driver i2c_driver = {
334	.driver = {
335	.name = "wm8739",
336	},
337	.id = I2C_DRIVERID_WM8739,
338	.attach_adapter = wm8739_probe,
339	.detach_client = wm8739_detach,
340	.command = wm8739_command,
341	};
342
343
344	static int __init wm8739_init_module(void)
345	{
346	return i2c_add_driver(&i2c_driver);
347	}
348
349	static void __exit wm8739_cleanup_module(void)
350	{
351	i2c_del_driver(&i2c_driver);
352	}
353
354	module_init(wm8739_init_module);
355	module_exit(wm8739_cleanup_module);