[net-next-2.6.git] / drivers / media / video / indycam.c

/*
 *  indycam.c - Silicon Graphics IndyCam digital camera driver
 *
 *  Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
 *  Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/sched.h>

#include <linux/videodev.h>
/* IndyCam decodes stream of photons into digital image representation ;-) */
#include <linux/video_decoder.h>
#include <linux/i2c.h>

#include "indycam.h"

//#define INDYCAM_DEBUG

#define INDYCAM_MODULE_VERSION "0.0.3"

MODULE_DESCRIPTION("SGI IndyCam driver");
MODULE_VERSION(INDYCAM_MODULE_VERSION);
MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
MODULE_LICENSE("GPL");

#ifdef INDYCAM_DEBUG
#define dprintk(x...) printk("IndyCam: " x);
#define indycam_regdump(client) indycam_regdump_debug(client)
#else
#define dprintk(x...)
#define indycam_regdump(client)
#endif

#define VINO_ADAPTER	(I2C_ALGO_SGI | I2C_HW_SGI_VINO)

struct indycam {
	struct i2c_client *client;
	int version;
};

static struct i2c_driver i2c_driver_indycam;

static const unsigned char initseq[] = {
	INDYCAM_CONTROL_AGCENA,		/* INDYCAM_CONTROL */
	INDYCAM_SHUTTER_DEFAULT,	/* INDYCAM_SHUTTER */
	INDYCAM_GAIN_DEFAULT,		/* INDYCAM_GAIN */
	0x00,				/* INDYCAM_BRIGHTNESS (read-only) */
	INDYCAM_RED_BALANCE_DEFAULT,	/* INDYCAM_RED_BALANCE */
	INDYCAM_BLUE_BALANCE_DEFAULT,	/* INDYCAM_BLUE_BALANCE */
	INDYCAM_RED_SATURATION_DEFAULT,	/* INDYCAM_RED_SATURATION */
	INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
};

/* IndyCam register handling */

static int indycam_read_reg(struct i2c_client *client, unsigned char reg,
			     unsigned char *value)
{
	int ret;

	if (reg == INDYCAM_RESET) {
		dprintk("indycam_read_reg(): "
			"skipping write-only register %d\n", reg);
		*value = 0;
		return 0;
	}

	ret = i2c_smbus_read_byte_data(client, reg);
	if (ret < 0) {
		printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
		       "register = 0x%02x\n", reg);
		return ret;
	}

	*value = (unsigned char)ret;

	return 0;
}

static int indycam_write_reg(struct i2c_client *client, unsigned char reg,
			     unsigned char value)
{
	int err;

	if ((reg == INDYCAM_BRIGHTNESS)
	    || (reg == INDYCAM_VERSION)) {
		dprintk("indycam_write_reg(): "
			"skipping read-only register %d\n", reg);
		return 0;
	}

	dprintk("Writing Reg %d = 0x%02x\n", reg, value);
	err = i2c_smbus_write_byte_data(client, reg, value);
	if (err) {
		printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
		       "register = 0x%02x, value = 0x%02x\n", reg, value);
	}
	return err;
}

static int indycam_write_block(struct i2c_client *client, unsigned char reg,
				unsigned char length, unsigned char *data)
{
	unsigned char i;
	int err;

	for (i = reg; i < length; i++) {
		err = indycam_write_reg(client, reg + i, data[i]);
		if (err)
			return err;
	}

	return 0;
}

/* Helper functions */

#ifdef INDYCAM_DEBUG
static void indycam_regdump_debug(struct i2c_client *client)
{
	int i;
	unsigned char val;

	for (i = 0; i < 9; i++) {
		indycam_read_reg(client, i, &val);
		dprintk("Reg %d = 0x%02x\n", i, val);
	}
}
#endif

static int indycam_get_controls(struct i2c_client *client,
				struct indycam_control *ctrl)
{
	unsigned char ctrl_reg;

	indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
	ctrl->agc = (ctrl_reg & INDYCAM_CONTROL_AGCENA)
		? INDYCAM_VALUE_ENABLED
		: INDYCAM_VALUE_DISABLED;
	ctrl->awb = (ctrl_reg & INDYCAM_CONTROL_AWBCTL)
		? INDYCAM_VALUE_ENABLED
		: INDYCAM_VALUE_DISABLED;
	indycam_read_reg(client, INDYCAM_SHUTTER,
			 (unsigned char *)&ctrl->shutter);
	indycam_read_reg(client, INDYCAM_GAIN,
			 (unsigned char *)&ctrl->gain);
	indycam_read_reg(client, INDYCAM_RED_BALANCE,
			 (unsigned char *)&ctrl->red_balance);
	indycam_read_reg(client, INDYCAM_BLUE_BALANCE,
			 (unsigned char *)&ctrl->blue_balance);
	indycam_read_reg(client, INDYCAM_RED_SATURATION,
			 (unsigned char *)&ctrl->red_saturation);
	indycam_read_reg(client, INDYCAM_BLUE_SATURATION,
			 (unsigned char *)&ctrl->blue_saturation);
	indycam_read_reg(client, INDYCAM_GAMMA,
			 (unsigned char *)&ctrl->gamma);

	return 0;
}

static int indycam_set_controls(struct i2c_client *client,
				struct indycam_control *ctrl)
{
	unsigned char ctrl_reg;

	indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
	if (ctrl->agc != INDYCAM_VALUE_UNCHANGED) {
		if (ctrl->agc)
			ctrl_reg |= INDYCAM_CONTROL_AGCENA;
		else
			ctrl_reg &= ~INDYCAM_CONTROL_AGCENA;
	}
	if (ctrl->awb != INDYCAM_VALUE_UNCHANGED) {
		if (ctrl->awb)
			ctrl_reg |= INDYCAM_CONTROL_AWBCTL;
		else
			ctrl_reg &= ~INDYCAM_CONTROL_AWBCTL;
	}
	indycam_write_reg(client, INDYCAM_CONTROL, ctrl_reg);

	if (ctrl->shutter >= 0)
		indycam_write_reg(client, INDYCAM_SHUTTER, ctrl->shutter);
	if (ctrl->gain >= 0)
		indycam_write_reg(client, INDYCAM_GAIN, ctrl->gain);
	if (ctrl->red_balance >= 0)
		indycam_write_reg(client, INDYCAM_RED_BALANCE,
				  ctrl->red_balance);
	if (ctrl->blue_balance >= 0)
		indycam_write_reg(client, INDYCAM_BLUE_BALANCE,
				  ctrl->blue_balance);
	if (ctrl->red_saturation >= 0)
		indycam_write_reg(client, INDYCAM_RED_SATURATION,
				  ctrl->red_saturation);
	if (ctrl->blue_saturation >= 0)
		indycam_write_reg(client, INDYCAM_BLUE_SATURATION,
				  ctrl->blue_saturation);
	if (ctrl->gamma >= 0)
		indycam_write_reg(client, INDYCAM_GAMMA, ctrl->gamma);

	return 0;
}

/* I2C-interface */

static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
{
	int err = 0;
	struct indycam *camera;
	struct i2c_client *client;

	printk(KERN_INFO "SGI IndyCam driver version %s\n",
	       INDYCAM_MODULE_VERSION);

	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (!client)
		return -ENOMEM;
	camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
	if (!camera) {
		err = -ENOMEM;
		goto out_free_client;
	}

	memset(client, 0, sizeof(struct i2c_client));
	memset(camera, 0, sizeof(struct indycam));

	client->addr = addr;
	client->adapter = adap;
	client->driver = &i2c_driver_indycam;
	client->flags = 0;
	strcpy(client->name, "IndyCam client");
	i2c_set_clientdata(client, camera);

	camera->client = client;

	err = i2c_attach_client(client);
	if (err)
		goto out_free_camera;

	camera->version = i2c_smbus_read_byte_data(client, INDYCAM_VERSION);
	if (camera->version != CAMERA_VERSION_INDY &&
	    camera->version != CAMERA_VERSION_MOOSE) {
		err = -ENODEV;
		goto out_detach_client;
	}
	printk(KERN_INFO "IndyCam v%d.%d detected\n",
	       INDYCAM_VERSION_MAJOR(camera->version),
	       INDYCAM_VERSION_MINOR(camera->version));

	indycam_regdump(client);

	// initialize
	err = indycam_write_block(client, 0, sizeof(initseq),
				  (unsigned char *)&initseq);
	if (err) {
		printk(KERN_ERR "IndyCam initalization failed\n");
		err = -EIO;
		goto out_detach_client;
	}

	indycam_regdump(client);

	// white balance
	err = indycam_write_reg(client, INDYCAM_CONTROL,
			  INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
	if (err) {
		printk(KERN_ERR "IndyCam white balance "
		       "initialization failed\n");
		err = -EIO;
		goto out_detach_client;
	}

	indycam_regdump(client);

	printk(KERN_INFO "IndyCam initialized\n");

	return 0;

out_detach_client:
	i2c_detach_client(client);
out_free_camera:
	kfree(camera);
out_free_client:
	kfree(client);
	return err;
}

static int indycam_probe(struct i2c_adapter *adap)
{
	/* Indy specific crap */
	if (adap->id == VINO_ADAPTER)
		return indycam_attach(adap, INDYCAM_ADDR, 0);
	/* Feel free to add probe here :-) */
	return -ENODEV;
}

static int indycam_detach(struct i2c_client *client)
{
	struct indycam *camera = i2c_get_clientdata(client);

	i2c_detach_client(client);
	kfree(camera);
	kfree(client);
	return 0;
}

static int indycam_command(struct i2c_client *client, unsigned int cmd,
			   void *arg)
{
	// struct indycam *camera = i2c_get_clientdata(client);

	/* The old video_decoder interface just isn't enough,
	 * so we'll use some custom commands. */
	switch (cmd) {
	case DECODER_GET_CAPABILITIES: {
		struct video_decoder_capability *cap = arg;

		cap->flags  = VIDEO_DECODER_NTSC;
		cap->inputs = 1;
		cap->outputs = 1;
		break;
	}
	case DECODER_GET_STATUS: {
		int *iarg = arg;

		*iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC |
			DECODER_STATUS_COLOR;
		break;
	}
	case DECODER_SET_NORM: {
		int *iarg = arg;

		switch (*iarg) {
		case VIDEO_MODE_NTSC:
			break;
		default:
			return -EINVAL;
		}
		break;
	}
	case DECODER_SET_INPUT:	{
		int *iarg = arg;

		if (*iarg != 0)
			return -EINVAL;
		break;
	}
	case DECODER_SET_OUTPUT: {
		int *iarg = arg;

		if (*iarg != 0)
			return -EINVAL;
		break;
	}
	case DECODER_ENABLE_OUTPUT: {
		/* Always enabled */
		break;
	}
	case DECODER_SET_PICTURE: {
		// struct video_picture *pic = arg;
		/* TODO: convert values for indycam_set_controls() */
		break;
	}
	case DECODER_INDYCAM_GET_CONTROLS: {
		struct indycam_control *ctrl = arg;
		indycam_get_controls(client, ctrl);
	}
	case DECODER_INDYCAM_SET_CONTROLS: {
		struct indycam_control *ctrl = arg;
		indycam_set_controls(client, ctrl);
	}
	default:
		return -EINVAL;
	}

	return 0;
}

static struct i2c_driver i2c_driver_indycam = {
	.owner		= THIS_MODULE,
	.name 		= "indycam",
	.id 		= I2C_DRIVERID_INDYCAM,
	.flags 		= I2C_DF_NOTIFY,
	.attach_adapter = indycam_probe,
	.detach_client 	= indycam_detach,
	.command 	= indycam_command,
};

static int __init indycam_init(void)
{
	return i2c_add_driver(&i2c_driver_indycam);
}

static void __exit indycam_exit(void)
{
	i2c_del_driver(&i2c_driver_indycam);
}

module_init(indycam_init);
module_exit(indycam_exit);
Commit	Line	Data
d203a7ec RB	1	/*
	2	* indycam.c - Silicon Graphics IndyCam digital camera driver
	3	*
	4	* Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
	5	* Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/delay.h>
	15	#include <linux/errno.h>
	16	#include <linux/fs.h>
	17	#include <linux/kernel.h>
	18	#include <linux/major.h>
	19	#include <linux/slab.h>
	20	#include <linux/mm.h>
	21	#include <linux/sched.h>
	22
	23	#include <linux/videodev.h>
	24	/* IndyCam decodes stream of photons into digital image representation ;-) */
	25	#include <linux/video_decoder.h>
	26	#include <linux/i2c.h>
	27
	28	#include "indycam.h"
	29
	30	//#define INDYCAM_DEBUG
	31
	32	#define INDYCAM_MODULE_VERSION "0.0.3"
	33
	34	MODULE_DESCRIPTION("SGI IndyCam driver");
	35	MODULE_VERSION(INDYCAM_MODULE_VERSION);
	36	MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
	37	MODULE_LICENSE("GPL");
	38
	39	#ifdef INDYCAM_DEBUG
	40	#define dprintk(x...) printk("IndyCam: " x);
	41	#define indycam_regdump(client) indycam_regdump_debug(client)
	42	#else
	43	#define dprintk(x...)
	44	#define indycam_regdump(client)
	45	#endif
	46
	47	#define VINO_ADAPTER (I2C_ALGO_SGI \| I2C_HW_SGI_VINO)
	48
	49	struct indycam {
	50	struct i2c_client *client;
	51	int version;
	52	};
	53
	54	static struct i2c_driver i2c_driver_indycam;
	55
	56	static const unsigned char initseq[] = {
	57	INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
	58	INDYCAM_SHUTTER_DEFAULT, /* INDYCAM_SHUTTER */
	59	INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */
	60	0x00, /* INDYCAM_BRIGHTNESS (read-only) */
	61	INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */
	62	INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */
	63	INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */
	64	INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
65	};
66
67	/* IndyCam register handling */
68
69	static int indycam_read_reg(struct i2c_client *client, unsigned char reg,
70	unsigned char *value)
71	{
72	int ret;
73
74	if (reg == INDYCAM_RESET) {
75	dprintk("indycam_read_reg(): "
76	"skipping write-only register %d\n", reg);
77	*value = 0;
78	return 0;
79	}
80
81	ret = i2c_smbus_read_byte_data(client, reg);
82	if (ret < 0) {
83	printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
84	"register = 0x%02x\n", reg);
85	return ret;
86	}
87
88	*value = (unsigned char)ret;
89
90	return 0;
91	}
92
93	static int indycam_write_reg(struct i2c_client *client, unsigned char reg,
94	unsigned char value)
95	{
96	int err;
97
98	if ((reg == INDYCAM_BRIGHTNESS)
99	\|\| (reg == INDYCAM_VERSION)) {
100	dprintk("indycam_write_reg(): "
101	"skipping read-only register %d\n", reg);
102	return 0;
103	}
104
105	dprintk("Writing Reg %d = 0x%02x\n", reg, value);
106	err = i2c_smbus_write_byte_data(client, reg, value);
107	if (err) {
108	printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
109	"register = 0x%02x, value = 0x%02x\n", reg, value);
110	}
111	return err;
112	}
113
114	static int indycam_write_block(struct i2c_client *client, unsigned char reg,
115	unsigned char length, unsigned char *data)
116	{
117	unsigned char i;
118	int err;
119
120	for (i = reg; i < length; i++) {
121	err = indycam_write_reg(client, reg + i, data[i]);
122	if (err)
123	return err;
124	}
125
126	return 0;
127	}
128
129	/* Helper functions */
130
131	#ifdef INDYCAM_DEBUG
132	static void indycam_regdump_debug(struct i2c_client *client)
133	{
134	int i;
135	unsigned char val;
136
137	for (i = 0; i < 9; i++) {
138	indycam_read_reg(client, i, &val);
139	dprintk("Reg %d = 0x%02x\n", i, val);
140	}
141	}
142	#endif
143
144	static int indycam_get_controls(struct i2c_client *client,
145	struct indycam_control *ctrl)
146	{
147	unsigned char ctrl_reg;
148
149	indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
150	ctrl->agc = (ctrl_reg & INDYCAM_CONTROL_AGCENA)
151	? INDYCAM_VALUE_ENABLED
152	: INDYCAM_VALUE_DISABLED;
153	ctrl->awb = (ctrl_reg & INDYCAM_CONTROL_AWBCTL)
154	? INDYCAM_VALUE_ENABLED
155	: INDYCAM_VALUE_DISABLED;
156	indycam_read_reg(client, INDYCAM_SHUTTER,
157	(unsigned char *)&ctrl->shutter);
158	indycam_read_reg(client, INDYCAM_GAIN,
159	(unsigned char *)&ctrl->gain);
160	indycam_read_reg(client, INDYCAM_RED_BALANCE,
161	(unsigned char *)&ctrl->red_balance);
162	indycam_read_reg(client, INDYCAM_BLUE_BALANCE,
163	(unsigned char *)&ctrl->blue_balance);
164	indycam_read_reg(client, INDYCAM_RED_SATURATION,
165	(unsigned char *)&ctrl->red_saturation);
166	indycam_read_reg(client, INDYCAM_BLUE_SATURATION,
167	(unsigned char *)&ctrl->blue_saturation);
168	indycam_read_reg(client, INDYCAM_GAMMA,
169	(unsigned char *)&ctrl->gamma);
170
171	return 0;
172	}
173
174	static int indycam_set_controls(struct i2c_client *client,
175	struct indycam_control *ctrl)
176	{
177	unsigned char ctrl_reg;
178
179	indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
180	if (ctrl->agc != INDYCAM_VALUE_UNCHANGED) {
181	if (ctrl->agc)
182	ctrl_reg \|= INDYCAM_CONTROL_AGCENA;
183	else
184	ctrl_reg &= ~INDYCAM_CONTROL_AGCENA;
185	}
186	if (ctrl->awb != INDYCAM_VALUE_UNCHANGED) {
187	if (ctrl->awb)
188	ctrl_reg \|= INDYCAM_CONTROL_AWBCTL;
189	else
190	ctrl_reg &= ~INDYCAM_CONTROL_AWBCTL;
191	}
192	indycam_write_reg(client, INDYCAM_CONTROL, ctrl_reg);
193
194	if (ctrl->shutter >= 0)
195	indycam_write_reg(client, INDYCAM_SHUTTER, ctrl->shutter);
196	if (ctrl->gain >= 0)
197	indycam_write_reg(client, INDYCAM_GAIN, ctrl->gain);
198	if (ctrl->red_balance >= 0)
199	indycam_write_reg(client, INDYCAM_RED_BALANCE,
200	ctrl->red_balance);
201	if (ctrl->blue_balance >= 0)
202	indycam_write_reg(client, INDYCAM_BLUE_BALANCE,
203	ctrl->blue_balance);
204	if (ctrl->red_saturation >= 0)
205	indycam_write_reg(client, INDYCAM_RED_SATURATION,
206	ctrl->red_saturation);
207	if (ctrl->blue_saturation >= 0)
208	indycam_write_reg(client, INDYCAM_BLUE_SATURATION,
209	ctrl->blue_saturation);
210	if (ctrl->gamma >= 0)
211	indycam_write_reg(client, INDYCAM_GAMMA, ctrl->gamma);
212
213	return 0;
214	}
215
216	/* I2C-interface */
217
218	static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
219	{
220	int err = 0;
221	struct indycam *camera;
222	struct i2c_client *client;
223
224	printk(KERN_INFO "SGI IndyCam driver version %s\n",
225	INDYCAM_MODULE_VERSION);
226
227	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
228	if (!client)
229	return -ENOMEM;
230	camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
231	if (!camera) {
232	err = -ENOMEM;
233	goto out_free_client;
234	}
235
236	memset(client, 0, sizeof(struct i2c_client));
237	memset(camera, 0, sizeof(struct indycam));
238
239	client->addr = addr;
240	client->adapter = adap;
241	client->driver = &i2c_driver_indycam;
242	client->flags = 0;
243	strcpy(client->name, "IndyCam client");
244	i2c_set_clientdata(client, camera);
245
246	camera->client = client;
247
248	err = i2c_attach_client(client);
249	if (err)
250	goto out_free_camera;
251
252	camera->version = i2c_smbus_read_byte_data(client, INDYCAM_VERSION);
253	if (camera->version != CAMERA_VERSION_INDY &&
254	camera->version != CAMERA_VERSION_MOOSE) {
255	err = -ENODEV;
256	goto out_detach_client;
257	}
258	printk(KERN_INFO "IndyCam v%d.%d detected\n",
259	INDYCAM_VERSION_MAJOR(camera->version),
260	INDYCAM_VERSION_MINOR(camera->version));
261
262	indycam_regdump(client);
263
264	// initialize
265	err = indycam_write_block(client, 0, sizeof(initseq),
266	(unsigned char *)&initseq);
267	if (err) {
268	printk(KERN_ERR "IndyCam initalization failed\n");
269	err = -EIO;
270	goto out_detach_client;
271	}
272
273	indycam_regdump(client);
274
275	// white balance
276	err = indycam_write_reg(client, INDYCAM_CONTROL,
277	INDYCAM_CONTROL_AGCENA \| INDYCAM_CONTROL_AWBCTL);
278	if (err) {
279	printk(KERN_ERR "IndyCam white balance "
280	"initialization failed\n");
281	err = -EIO;
282	goto out_detach_client;
283	}
284
285	indycam_regdump(client);
286
287	printk(KERN_INFO "IndyCam initialized\n");
288
289	return 0;
290
291	out_detach_client:
292	i2c_detach_client(client);
293	out_free_camera:
294	kfree(camera);
295	out_free_client:
296	kfree(client);
297	return err;
298	}
299
300	static int indycam_probe(struct i2c_adapter *adap)
301	{
302	/* Indy specific crap */
303	if (adap->id == VINO_ADAPTER)
304	return indycam_attach(adap, INDYCAM_ADDR, 0);
305	/* Feel free to add probe here :-) */
306	return -ENODEV;
307	}
308
309	static int indycam_detach(struct i2c_client *client)
310	{
311	struct indycam *camera = i2c_get_clientdata(client);
312
313	i2c_detach_client(client);
314	kfree(camera);
315	kfree(client);
316	return 0;
317	}
318
319	static int indycam_command(struct i2c_client *client, unsigned int cmd,
320	void *arg)
321	{
322	// struct indycam *camera = i2c_get_clientdata(client);
323
324	/* The old video_decoder interface just isn't enough,
325	* so we'll use some custom commands. */
326	switch (cmd) {
327	case DECODER_GET_CAPABILITIES: {
328	struct video_decoder_capability *cap = arg;
329
330	cap->flags = VIDEO_DECODER_NTSC;
331	cap->inputs = 1;
332	cap->outputs = 1;
333	break;
334	}
335	case DECODER_GET_STATUS: {
336	int *iarg = arg;
337
338	*iarg = DECODER_STATUS_GOOD \| DECODER_STATUS_NTSC \|
339	DECODER_STATUS_COLOR;
340	break;
341	}
342	case DECODER_SET_NORM: {
343	int *iarg = arg;
344
345	switch (*iarg) {
346	case VIDEO_MODE_NTSC:
347	break;
348	default:
349	return -EINVAL;
350	}
351	break;
352	}
353	case DECODER_SET_INPUT: {
354	int *iarg = arg;
355
356	if (*iarg != 0)
357	return -EINVAL;
358	break;
359	}
360	case DECODER_SET_OUTPUT: {
361	int *iarg = arg;
362
363	if (*iarg != 0)
364	return -EINVAL;
365	break;
366	}
367	case DECODER_ENABLE_OUTPUT: {
368	/* Always enabled */
369	break;
370	}
371	case DECODER_SET_PICTURE: {
372	// struct video_picture *pic = arg;
373	/* TODO: convert values for indycam_set_controls() */
374	break;
375	}
376	case DECODER_INDYCAM_GET_CONTROLS: {
377	struct indycam_control *ctrl = arg;
378	indycam_get_controls(client, ctrl);
379	}
380	case DECODER_INDYCAM_SET_CONTROLS: {
381	struct indycam_control *ctrl = arg;
382	indycam_set_controls(client, ctrl);
383	}
384	default:
385	return -EINVAL;
386	}
387
388	return 0;
389	}
390
391	static struct i2c_driver i2c_driver_indycam = {
392	.owner = THIS_MODULE,
393	.name = "indycam",
394	.id = I2C_DRIVERID_INDYCAM,
395	.flags = I2C_DF_NOTIFY,
396	.attach_adapter = indycam_probe,
397	.detach_client = indycam_detach,
398	.command = indycam_command,
399	};
400
401	static int __init indycam_init(void)
402	{
403	return i2c_add_driver(&i2c_driver_indycam);
404	}
405
406	static void __exit indycam_exit(void)
407	{
408	i2c_del_driver(&i2c_driver_indycam);
409	}
410
411	module_init(indycam_init);
412	module_exit(indycam_exit);