[deliverable/linux.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/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/slab.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_MODULE_VERSION "0.0.5"

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

// #define INDYCAM_DEBUG

#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

struct indycam {
	struct i2c_client *client;
	u8 version;
};

static struct i2c_driver i2c_driver_indycam;

static const u8 initseq[] = {
	INDYCAM_CONTROL_AGCENA,		/* INDYCAM_CONTROL */
	INDYCAM_SHUTTER_60,		/* 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, u8 reg, u8 *value)
{
	int ret;

	if (reg == INDYCAM_REG_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 = (u8)ret;

	return 0;
}

static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
{
	int err;

	if ((reg == INDYCAM_REG_BRIGHTNESS)
	    || (reg == INDYCAM_REG_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, u8 reg,
			       u8 length, u8 *data)
{
	int i, err;

	for (i = 0; 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;
	u8 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_control(struct i2c_client *client,
			       struct indycam_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->type) {
	case INDYCAM_CONTROL_AGC:
	case INDYCAM_CONTROL_AWB:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			return -EIO;
		if (ctrl->type == INDYCAM_CONTROL_AGC)
			ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
				? 1 : 0;
		else
			ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
				? 1 : 0;
		break;
	case INDYCAM_CONTROL_SHUTTER:
		ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
		if (ret)
			return -EIO;
		ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
		break;
	case INDYCAM_CONTROL_GAIN:
		ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_RED_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_BLUE_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_RED_SATURATION:
		ret = indycam_read_reg(client,
				       INDYCAM_REG_RED_SATURATION, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_BLUE_SATURATION:
		ret = indycam_read_reg(client,
				       INDYCAM_REG_BLUE_SATURATION, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case INDYCAM_CONTROL_GAMMA:
		if (camera->version == CAMERA_VERSION_MOOSE) {
			ret = indycam_read_reg(client,
					       INDYCAM_REG_GAMMA, &reg);
			if (ret)
				return -EIO;
			ctrl->value = (s32)reg;
		} else {
			ctrl->value = INDYCAM_GAMMA_DEFAULT;
		}
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

static int indycam_set_control(struct i2c_client *client,
			       struct indycam_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->type) {
	case INDYCAM_CONTROL_AGC:
	case INDYCAM_CONTROL_AWB:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			break;

		if (ctrl->type == INDYCAM_CONTROL_AGC) {
			if (ctrl->value)
				reg |= INDYCAM_CONTROL_AGCENA;
			else
				reg &= ~INDYCAM_CONTROL_AGCENA;
		} else {
			if (ctrl->value)
				reg |= INDYCAM_CONTROL_AWBCTL;
			else
				reg &= ~INDYCAM_CONTROL_AWBCTL;
		}

		ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
		break;
	case INDYCAM_CONTROL_SHUTTER:
		reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
		ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
		break;
	case INDYCAM_CONTROL_GAIN:
		ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
		break;
	case INDYCAM_CONTROL_RED_BALANCE:
		ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_BLUE_BALANCE:
		ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_RED_SATURATION:
		ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_BLUE_SATURATION:
		ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
					ctrl->value);
		break;
	case INDYCAM_CONTROL_GAMMA:
		if (camera->version == CAMERA_VERSION_MOOSE) {
			ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
						ctrl->value);
		}
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

/* 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_REG_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), (u8 *)&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_REG_CONTROL,
			  INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
	if (err) {
		printk(KERN_ERR "IndyCam: White balancing camera 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 == I2C_HW_SGI_VINO)
		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_CONTROL: {
		return indycam_get_control(client, arg);
	}
	case DECODER_INDYCAM_SET_CONTROL: {
		return indycam_set_control(client, arg);
	}
	default:
		return -EINVAL;
	}

	return 0;
}

static struct i2c_driver i2c_driver_indycam = {
	.driver = {
		.owner	= THIS_MODULE,
		.name 	= "indycam",
	},
	.id		= I2C_DRIVERID_INDYCAM,
	.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
d203a7ec RB	12	#include <linux/delay.h>
	13	#include <linux/errno.h>
	14	#include <linux/fs.h>
495515b3	15	#include <linux/init.h>
d203a7ec RB	16	#include <linux/kernel.h>
d203a7ec RB	17	#include <linux/major.h>
495515b3	18	#include <linux/module.h>
d203a7ec RB	19	#include <linux/mm.h>
d203a7ec RB	20	#include <linux/sched.h>
495515b3	21	#include <linux/slab.h>
d203a7ec RB	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
a637a114	30	#define INDYCAM_MODULE_VERSION "0.0.5"
d203a7ec RB	31
	32	MODULE_DESCRIPTION("SGI IndyCam driver");
	33	MODULE_VERSION(INDYCAM_MODULE_VERSION);
	34	MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
	35	MODULE_LICENSE("GPL");
	36
a637a114 LM	37	// #define INDYCAM_DEBUG
a637a114 LM	38
d203a7ec RB	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
d203a7ec RB	47	struct indycam {
d203a7ec RB	48	struct i2c_client *client;
a637a114	49	u8 version;
d203a7ec RB	50	};
	51
	52	static struct i2c_driver i2c_driver_indycam;
	53
a637a114	54	static const u8 initseq[] = {
d203a7ec	55	INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
a637a114	56	INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */
d203a7ec RB	57	INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */
	58	0x00, /* INDYCAM_BRIGHTNESS (read-only) */
	59	INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */
	60	INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */
	61	INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */
	62	INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
	63	};
	64
	65	/* IndyCam register handling */
	66
a637a114	67	static int indycam_read_reg(struct i2c_client client, u8 reg, u8 value)
d203a7ec RB	68	{
	69	int ret;
	70
a637a114	71	if (reg == INDYCAM_REG_RESET) {
d203a7ec RB	72	dprintk("indycam_read_reg(): "
	73	"skipping write-only register %d\n", reg);
	74	*value = 0;
	75	return 0;
	76	}
	77
	78	ret = i2c_smbus_read_byte_data(client, reg);
a637a114	79
d203a7ec RB	80	if (ret < 0) {
	81	printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
	82	"register = 0x%02x\n", reg);
	83	return ret;
	84	}
	85
a637a114	86	*value = (u8)ret;
d203a7ec RB	87
	88	return 0;
	89	}
	90
a637a114	91	static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
d203a7ec RB	92	{
	93	int err;
	94
a637a114 LM	95	if ((reg == INDYCAM_REG_BRIGHTNESS)
a637a114 LM	96	\|\| (reg == INDYCAM_REG_VERSION)) {
d203a7ec RB	97	dprintk("indycam_write_reg(): "
	98	"skipping read-only register %d\n", reg);
	99	return 0;
	100	}
	101
	102	dprintk("Writing Reg %d = 0x%02x\n", reg, value);
	103	err = i2c_smbus_write_byte_data(client, reg, value);
a637a114	104
d203a7ec RB	105	if (err) {
	106	printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
	107	"register = 0x%02x, value = 0x%02x\n", reg, value);
	108	}
	109	return err;
	110	}
	111
a637a114 LM	112	static int indycam_write_block(struct i2c_client *client, u8 reg,
a637a114 LM	113	u8 length, u8 *data)
d203a7ec	114	{
a637a114	115	int i, err;
d203a7ec	116
a637a114	117	for (i = 0; i < length; i++) {
d203a7ec RB	118	err = indycam_write_reg(client, reg + i, data[i]);
	119	if (err)
	120	return err;
	121	}
	122
	123	return 0;
	124	}
	125
	126	/* Helper functions */
	127
	128	#ifdef INDYCAM_DEBUG
	129	static void indycam_regdump_debug(struct i2c_client *client)
	130	{
	131	int i;
a637a114	132	u8 val;
d203a7ec RB	133
	134	for (i = 0; i < 9; i++) {
	135	indycam_read_reg(client, i, &val);
	136	dprintk("Reg %d = 0x%02x\n", i, val);
	137	}
	138	}
	139	#endif
	140
a637a114 LM	141	static int indycam_get_control(struct i2c_client *client,
a637a114 LM	142	struct indycam_control *ctrl)
d203a7ec	143	{
a637a114 LM	144	struct indycam *camera = i2c_get_clientdata(client);
	145	u8 reg;
	146	int ret = 0;
	147
	148	switch (ctrl->type) {
	149	case INDYCAM_CONTROL_AGC:
	150	case INDYCAM_CONTROL_AWB:
	151	ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
	152	if (ret)
	153	return -EIO;
	154	if (ctrl->type == INDYCAM_CONTROL_AGC)
	155	ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
	156	? 1 : 0;
	157	else
	158	ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
	159	? 1 : 0;
	160	break;
	161	case INDYCAM_CONTROL_SHUTTER:
	162	ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
	163	if (ret)
	164	return -EIO;
	165	ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
	166	break;
	167	case INDYCAM_CONTROL_GAIN:
	168	ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
	169	if (ret)
	170	return -EIO;
	171	ctrl->value = (s32)reg;
	172	break;
	173	case INDYCAM_CONTROL_RED_BALANCE:
	174	ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
	175	if (ret)
	176	return -EIO;
	177	ctrl->value = (s32)reg;
	178	break;
	179	case INDYCAM_CONTROL_BLUE_BALANCE:
	180	ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, &reg);
	181	if (ret)
	182	return -EIO;
	183	ctrl->value = (s32)reg;
	184	break;
	185	case INDYCAM_CONTROL_RED_SATURATION:
	186	ret = indycam_read_reg(client,
	187	INDYCAM_REG_RED_SATURATION, &reg);
	188	if (ret)
	189	return -EIO;
	190	ctrl->value = (s32)reg;
	191	break;
	192	case INDYCAM_CONTROL_BLUE_SATURATION:
	193	ret = indycam_read_reg(client,
	194	INDYCAM_REG_BLUE_SATURATION, &reg);
	195	if (ret)
	196	return -EIO;
	197	ctrl->value = (s32)reg;
	198	break;
	199	case INDYCAM_CONTROL_GAMMA:
	200	if (camera->version == CAMERA_VERSION_MOOSE) {
	201	ret = indycam_read_reg(client,
	202	INDYCAM_REG_GAMMA, &reg);
	203	if (ret)
	204	return -EIO;
	205	ctrl->value = (s32)reg;
	206	} else {
	207	ctrl->value = INDYCAM_GAMMA_DEFAULT;
208	}
209	break;
210	default:
211	ret = -EINVAL;
212	}
d203a7ec	213
a637a114	214	return ret;
d203a7ec RB	215	}
d203a7ec RB	216
a637a114 LM	217	static int indycam_set_control(struct i2c_client *client,
a637a114 LM	218	struct indycam_control *ctrl)
d203a7ec	219	{
a637a114 LM	220	struct indycam *camera = i2c_get_clientdata(client);
	221	u8 reg;
	222	int ret = 0;
	223
	224	switch (ctrl->type) {
	225	case INDYCAM_CONTROL_AGC:
	226	case INDYCAM_CONTROL_AWB:
	227	ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
	228	if (ret)
	229	break;
d203a7ec	230
a637a114 LM	231	if (ctrl->type == INDYCAM_CONTROL_AGC) {
	232	if (ctrl->value)
	233	reg \|= INDYCAM_CONTROL_AGCENA;
	234	else
	235	reg &= ~INDYCAM_CONTROL_AGCENA;
	236	} else {
	237	if (ctrl->value)
	238	reg \|= INDYCAM_CONTROL_AWBCTL;
	239	else
	240	reg &= ~INDYCAM_CONTROL_AWBCTL;
	241	}
	242
	243	ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
	244	break;
	245	case INDYCAM_CONTROL_SHUTTER:
	246	reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
	247	ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
	248	break;
	249	case INDYCAM_CONTROL_GAIN:
	250	ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
	251	break;
	252	case INDYCAM_CONTROL_RED_BALANCE:
	253	ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
	254	ctrl->value);
	255	break;
	256	case INDYCAM_CONTROL_BLUE_BALANCE:
	257	ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
	258	ctrl->value);
	259	break;
	260	case INDYCAM_CONTROL_RED_SATURATION:
	261	ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
	262	ctrl->value);
	263	break;
	264	case INDYCAM_CONTROL_BLUE_SATURATION:
	265	ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
	266	ctrl->value);
	267	break;
	268	case INDYCAM_CONTROL_GAMMA:
	269	if (camera->version == CAMERA_VERSION_MOOSE) {
	270	ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
	271	ctrl->value);
	272	}
	273	break;
	274	default:
	275	ret = -EINVAL;
d203a7ec	276	}
d203a7ec	277
a637a114	278	return ret;
d203a7ec RB	279	}
	280
	281	/* I2C-interface */
	282
	283	static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
	284	{
	285	int err = 0;
	286	struct indycam *camera;
	287	struct i2c_client *client;
	288
	289	printk(KERN_INFO "SGI IndyCam driver version %s\n",
	290	INDYCAM_MODULE_VERSION);
	291
	292	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	293	if (!client)
	294	return -ENOMEM;
	295	camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
	296	if (!camera) {
	297	err = -ENOMEM;
	298	goto out_free_client;
	299	}
	300
	301	memset(client, 0, sizeof(struct i2c_client));
	302	memset(camera, 0, sizeof(struct indycam));
	303
	304	client->addr = addr;
	305	client->adapter = adap;
	306	client->driver = &i2c_driver_indycam;
	307	client->flags = 0;
	308	strcpy(client->name, "IndyCam client");
	309	i2c_set_clientdata(client, camera);
	310
	311	camera->client = client;
	312
	313	err = i2c_attach_client(client);
	314	if (err)
	315	goto out_free_camera;
	316
a637a114 LM	317	camera->version = i2c_smbus_read_byte_data(client,
a637a114 LM	318	INDYCAM_REG_VERSION);
d203a7ec RB	319	if (camera->version != CAMERA_VERSION_INDY &&
	320	camera->version != CAMERA_VERSION_MOOSE) {
	321	err = -ENODEV;
	322	goto out_detach_client;
	323	}
	324	printk(KERN_INFO "IndyCam v%d.%d detected\n",
	325	INDYCAM_VERSION_MAJOR(camera->version),
	326	INDYCAM_VERSION_MINOR(camera->version));
	327
	328	indycam_regdump(client);
	329
	330	// initialize
a637a114	331	err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq);
d203a7ec RB	332	if (err) {
	333	printk(KERN_ERR "IndyCam initalization failed\n");
	334	err = -EIO;
	335	goto out_detach_client;
	336	}
	337
	338	indycam_regdump(client);
	339
	340	// white balance
a637a114	341	err = indycam_write_reg(client, INDYCAM_REG_CONTROL,
d203a7ec RB	342	INDYCAM_CONTROL_AGCENA \| INDYCAM_CONTROL_AWBCTL);
d203a7ec RB	343	if (err) {
a637a114	344	printk(KERN_ERR "IndyCam: White balancing camera failed\n");
d203a7ec RB	345	err = -EIO;
	346	goto out_detach_client;
	347	}
	348
	349	indycam_regdump(client);
	350
	351	printk(KERN_INFO "IndyCam initialized\n");
	352
	353	return 0;
	354
	355	out_detach_client:
	356	i2c_detach_client(client);
	357	out_free_camera:
	358	kfree(camera);
	359	out_free_client:
	360	kfree(client);
	361	return err;
	362	}
	363
	364	static int indycam_probe(struct i2c_adapter *adap)
	365	{
	366	/* Indy specific crap */
495515b3	367	if (adap->id == I2C_HW_SGI_VINO)
d203a7ec RB	368	return indycam_attach(adap, INDYCAM_ADDR, 0);
	369	/* Feel free to add probe here :-) */
	370	return -ENODEV;
	371	}
	372
	373	static int indycam_detach(struct i2c_client *client)
	374	{
	375	struct indycam *camera = i2c_get_clientdata(client);
	376
	377	i2c_detach_client(client);
	378	kfree(camera);
	379	kfree(client);
	380	return 0;
	381	}
	382
	383	static int indycam_command(struct i2c_client *client, unsigned int cmd,
	384	void *arg)
	385	{
	386	// struct indycam *camera = i2c_get_clientdata(client);
	387
	388	/* The old video_decoder interface just isn't enough,
	389	* so we'll use some custom commands. */
	390	switch (cmd) {
	391	case DECODER_GET_CAPABILITIES: {
	392	struct video_decoder_capability *cap = arg;
	393
	394	cap->flags = VIDEO_DECODER_NTSC;
	395	cap->inputs = 1;
	396	cap->outputs = 1;
	397	break;
	398	}
	399	case DECODER_GET_STATUS: {
	400	int *iarg = arg;
	401
	402	*iarg = DECODER_STATUS_GOOD \| DECODER_STATUS_NTSC \|
	403	DECODER_STATUS_COLOR;
	404	break;
	405	}
	406	case DECODER_SET_NORM: {
	407	int *iarg = arg;
	408
	409	switch (*iarg) {
	410	case VIDEO_MODE_NTSC:
	411	break;
	412	default:
	413	return -EINVAL;
	414	}
	415	break;
	416	}
	417	case DECODER_SET_INPUT: {
	418	int *iarg = arg;
	419
	420	if (*iarg != 0)
	421	return -EINVAL;
	422	break;
	423	}
	424	case DECODER_SET_OUTPUT: {
	425	int *iarg = arg;
	426
	427	if (*iarg != 0)
	428	return -EINVAL;
	429	break;
	430	}
	431	case DECODER_ENABLE_OUTPUT: {
432	/* Always enabled */
433	break;
434	}
435	case DECODER_SET_PICTURE: {
436	// struct video_picture *pic = arg;
437	/* TODO: convert values for indycam_set_controls() */
438	break;
439	}
a637a114 LM	440	case DECODER_INDYCAM_GET_CONTROL: {
a637a114 LM	441	return indycam_get_control(client, arg);
d203a7ec	442	}
a637a114 LM	443	case DECODER_INDYCAM_SET_CONTROL: {
a637a114 LM	444	return indycam_set_control(client, arg);
d203a7ec RB	445	}
	446	default:
	447	return -EINVAL;
	448	}
	449
	450	return 0;
	451	}
	452
	453	static struct i2c_driver i2c_driver_indycam = {
604f28e2 LR	454	.driver = {
	455	.owner = THIS_MODULE,
	456	.name = "indycam",
	457	},
a637a114	458	.id = I2C_DRIVERID_INDYCAM,
d203a7ec	459	.attach_adapter = indycam_probe,
a637a114 LM	460	.detach_client = indycam_detach,
a637a114 LM	461	.command = indycam_command,
d203a7ec RB	462	};
	463
	464	static int __init indycam_init(void)
	465	{
	466	return i2c_add_driver(&i2c_driver_indycam);
	467	}
	468
	469	static void __exit indycam_exit(void)
	470	{
	471	i2c_del_driver(&i2c_driver_indycam);
	472	}
	473
	474	module_init(indycam_init);
	475	module_exit(indycam_exit);