[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/slab.h>

/* IndyCam decodes stream of photons into digital image representation ;-) */
#include <linux/videodev2.h>
#include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/v4l2-i2c-drv-legacy.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");

static unsigned short normal_i2c[] = { 0x56 >> 1, I2C_CLIENT_END };

I2C_CLIENT_INSMOD;

// #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 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 v4l2_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->id) {
	case V4L2_CID_AUTOGAIN:
	case V4L2_CID_AUTO_WHITE_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			return -EIO;
		if (ctrl->id == V4L2_CID_AUTOGAIN)
			ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
				? 1 : 0;
		else
			ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
				? 1 : 0;
		break;
	case V4L2_CID_EXPOSURE:
		ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
		if (ret)
			return -EIO;
		ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
		break;
	case V4L2_CID_GAIN:
		ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case V4L2_CID_RED_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
		if (ret)
			return -EIO;
		ctrl->value = (s32)reg;
		break;
	case V4L2_CID_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 V4L2_CID_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 v4l2_control *ctrl)
{
	struct indycam *camera = i2c_get_clientdata(client);
	u8 reg;
	int ret = 0;

	switch (ctrl->id) {
	case V4L2_CID_AUTOGAIN:
	case V4L2_CID_AUTO_WHITE_BALANCE:
		ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
		if (ret)
			break;

		if (ctrl->id == V4L2_CID_AUTOGAIN) {
			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 V4L2_CID_EXPOSURE:
		reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
		ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
		break;
	case V4L2_CID_GAIN:
		ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
		break;
	case V4L2_CID_RED_BALANCE:
		ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
					ctrl->value);
		break;
	case V4L2_CID_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 V4L2_CID_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_command(struct i2c_client *client, unsigned int cmd,
			   void *arg)
{
	/* The old video_decoder interface just isn't enough,
	 * so we'll use some custom commands. */
	switch (cmd) {
	case VIDIOC_G_CTRL:
		return indycam_get_control(client, arg);

	case VIDIOC_S_CTRL:
		return indycam_set_control(client, arg);

	default:
		return -EINVAL;
	}

	return 0;
}

static int indycam_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	int err = 0;
	struct indycam *camera;

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

	camera = kzalloc(sizeof(struct indycam), GFP_KERNEL);
	if (!camera)
		return -ENOMEM;

	i2c_set_clientdata(client, camera);

	camera->client = client;

	camera->version = i2c_smbus_read_byte_data(client,
						   INDYCAM_REG_VERSION);
	if (camera->version != CAMERA_VERSION_INDY &&
	    camera->version != CAMERA_VERSION_MOOSE) {
		kfree(camera);
		return -ENODEV;
	}

	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 initialization failed\n");
		kfree(camera);
		return -EIO;
	}

	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");
		kfree(camera);
		return -EIO;
	}

	indycam_regdump(client);

	printk(KERN_INFO "IndyCam initialized\n");

	return 0;
}

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

	kfree(camera);
	return 0;
}

static int indycam_legacy_probe(struct i2c_adapter *adapter)
{
	return adapter->id == I2C_HW_SGI_VINO;
}

static const struct i2c_device_id indycam_id[] = {
	{ "indycam", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, indycam_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "indycam",
	.driverid = I2C_DRIVERID_INDYCAM,
	.command = indycam_command,
	.probe = indycam_probe,
	.remove = indycam_remove,
	.legacy_probe = indycam_legacy_probe,
	.id_table = indycam_id,
};
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	19	#include <linux/mm.h>
495515b3	20	#include <linux/slab.h>
d203a7ec	21
d203a7ec	22	/* IndyCam decodes stream of photons into digital image representation ;-) */
cf4e9484	23	#include <linux/videodev2.h>
d203a7ec	24	#include <linux/i2c.h>
cf4e9484 HV	25	#include <media/v4l2-common.h>
cf4e9484 HV	26	#include <media/v4l2-i2c-drv-legacy.h>
d203a7ec RB	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
cf4e9484 HV	37	static unsigned short normal_i2c[] = { 0x56 >> 1, I2C_CLIENT_END };
	38
	39	I2C_CLIENT_INSMOD;
	40
a637a114 LM	41	// #define INDYCAM_DEBUG
a637a114 LM	42
d203a7ec RB	43	#ifdef INDYCAM_DEBUG
	44	#define dprintk(x...) printk("IndyCam: " x);
	45	#define indycam_regdump(client) indycam_regdump_debug(client)
	46	#else
	47	#define dprintk(x...)
	48	#define indycam_regdump(client)
	49	#endif
	50
d203a7ec RB	51	struct indycam {
d203a7ec RB	52	struct i2c_client *client;
a637a114	53	u8 version;
d203a7ec RB	54	};
d203a7ec RB	55
a637a114	56	static const u8 initseq[] = {
d203a7ec	57	INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
a637a114	58	INDYCAM_SHUTTER_60, /* INDYCAM_SHUTTER */
d203a7ec RB	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
a637a114	69	static int indycam_read_reg(struct i2c_client client, u8 reg, u8 value)
d203a7ec RB	70	{
	71	int ret;
	72
a637a114	73	if (reg == INDYCAM_REG_RESET) {
d203a7ec RB	74	dprintk("indycam_read_reg(): "
	75	"skipping write-only register %d\n", reg);
	76	*value = 0;
	77	return 0;
	78	}
	79
	80	ret = i2c_smbus_read_byte_data(client, reg);
a637a114	81
d203a7ec RB	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
a637a114	88	*value = (u8)ret;
d203a7ec RB	89
	90	return 0;
	91	}
	92
a637a114	93	static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
d203a7ec RB	94	{
	95	int err;
	96
a637a114 LM	97	if ((reg == INDYCAM_REG_BRIGHTNESS)
a637a114 LM	98	\|\| (reg == INDYCAM_REG_VERSION)) {
d203a7ec RB	99	dprintk("indycam_write_reg(): "
	100	"skipping read-only register %d\n", reg);
	101	return 0;
	102	}
	103
	104	dprintk("Writing Reg %d = 0x%02x\n", reg, value);
	105	err = i2c_smbus_write_byte_data(client, reg, value);
a637a114	106
d203a7ec RB	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
a637a114 LM	114	static int indycam_write_block(struct i2c_client *client, u8 reg,
a637a114 LM	115	u8 length, u8 *data)
d203a7ec	116	{
a637a114	117	int i, err;
d203a7ec	118
a637a114	119	for (i = 0; i < length; i++) {
d203a7ec RB	120	err = indycam_write_reg(client, reg + i, data[i]);
	121	if (err)
	122	return err;
	123	}
	124
	125	return 0;
	126	}
	127
	128	/* Helper functions */
	129
	130	#ifdef INDYCAM_DEBUG
	131	static void indycam_regdump_debug(struct i2c_client *client)
	132	{
	133	int i;
a637a114	134	u8 val;
d203a7ec RB	135
	136	for (i = 0; i < 9; i++) {
	137	indycam_read_reg(client, i, &val);
	138	dprintk("Reg %d = 0x%02x\n", i, val);
	139	}
	140	}
	141	#endif
	142
a637a114	143	static int indycam_get_control(struct i2c_client *client,
cf4e9484	144	struct v4l2_control *ctrl)
d203a7ec	145	{
a637a114 LM	146	struct indycam *camera = i2c_get_clientdata(client);
	147	u8 reg;
	148	int ret = 0;
	149
cf4e9484 HV	150	switch (ctrl->id) {
	151	case V4L2_CID_AUTOGAIN:
	152	case V4L2_CID_AUTO_WHITE_BALANCE:
a637a114 LM	153	ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
	154	if (ret)
	155	return -EIO;
cf4e9484	156	if (ctrl->id == V4L2_CID_AUTOGAIN)
a637a114 LM	157	ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
	158	? 1 : 0;
	159	else
	160	ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
	161	? 1 : 0;
	162	break;
cf4e9484	163	case V4L2_CID_EXPOSURE:
a637a114 LM	164	ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, &reg);
	165	if (ret)
	166	return -EIO;
	167	ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
	168	break;
cf4e9484	169	case V4L2_CID_GAIN:
a637a114 LM	170	ret = indycam_read_reg(client, INDYCAM_REG_GAIN, &reg);
	171	if (ret)
	172	return -EIO;
	173	ctrl->value = (s32)reg;
	174	break;
cf4e9484	175	case V4L2_CID_RED_BALANCE:
a637a114 LM	176	ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, &reg);
	177	if (ret)
	178	return -EIO;
	179	ctrl->value = (s32)reg;
	180	break;
cf4e9484	181	case V4L2_CID_BLUE_BALANCE:
a637a114 LM	182	ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, &reg);
	183	if (ret)
	184	return -EIO;
	185	ctrl->value = (s32)reg;
	186	break;
	187	case INDYCAM_CONTROL_RED_SATURATION:
	188	ret = indycam_read_reg(client,
	189	INDYCAM_REG_RED_SATURATION, &reg);
	190	if (ret)
	191	return -EIO;
	192	ctrl->value = (s32)reg;
	193	break;
	194	case INDYCAM_CONTROL_BLUE_SATURATION:
	195	ret = indycam_read_reg(client,
	196	INDYCAM_REG_BLUE_SATURATION, &reg);
	197	if (ret)
	198	return -EIO;
	199	ctrl->value = (s32)reg;
	200	break;
cf4e9484	201	case V4L2_CID_GAMMA:
a637a114 LM	202	if (camera->version == CAMERA_VERSION_MOOSE) {
	203	ret = indycam_read_reg(client,
	204	INDYCAM_REG_GAMMA, &reg);
	205	if (ret)
	206	return -EIO;
	207	ctrl->value = (s32)reg;
	208	} else {
	209	ctrl->value = INDYCAM_GAMMA_DEFAULT;
	210	}
	211	break;
	212	default:
	213	ret = -EINVAL;
	214	}
d203a7ec	215
a637a114	216	return ret;
d203a7ec RB	217	}
d203a7ec RB	218
a637a114	219	static int indycam_set_control(struct i2c_client *client,
cf4e9484	220	struct v4l2_control *ctrl)
d203a7ec	221	{
a637a114 LM	222	struct indycam *camera = i2c_get_clientdata(client);
	223	u8 reg;
	224	int ret = 0;
	225
cf4e9484 HV	226	switch (ctrl->id) {
	227	case V4L2_CID_AUTOGAIN:
	228	case V4L2_CID_AUTO_WHITE_BALANCE:
a637a114 LM	229	ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, &reg);
	230	if (ret)
	231	break;
d203a7ec	232
cf4e9484	233	if (ctrl->id == V4L2_CID_AUTOGAIN) {
a637a114 LM	234	if (ctrl->value)
	235	reg \|= INDYCAM_CONTROL_AGCENA;
	236	else
	237	reg &= ~INDYCAM_CONTROL_AGCENA;
	238	} else {
	239	if (ctrl->value)
	240	reg \|= INDYCAM_CONTROL_AWBCTL;
	241	else
	242	reg &= ~INDYCAM_CONTROL_AWBCTL;
	243	}
	244
	245	ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
	246	break;
cf4e9484	247	case V4L2_CID_EXPOSURE:
a637a114 LM	248	reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
	249	ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
	250	break;
cf4e9484	251	case V4L2_CID_GAIN:
a637a114 LM	252	ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
a637a114 LM	253	break;
cf4e9484	254	case V4L2_CID_RED_BALANCE:
a637a114 LM	255	ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
	256	ctrl->value);
	257	break;
cf4e9484	258	case V4L2_CID_BLUE_BALANCE:
a637a114 LM	259	ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
	260	ctrl->value);
	261	break;
	262	case INDYCAM_CONTROL_RED_SATURATION:
	263	ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
	264	ctrl->value);
	265	break;
	266	case INDYCAM_CONTROL_BLUE_SATURATION:
	267	ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
	268	ctrl->value);
	269	break;
cf4e9484	270	case V4L2_CID_GAMMA:
a637a114 LM	271	if (camera->version == CAMERA_VERSION_MOOSE) {
	272	ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
	273	ctrl->value);
	274	}
	275	break;
	276	default:
	277	ret = -EINVAL;
d203a7ec	278	}
d203a7ec	279
a637a114	280	return ret;
d203a7ec RB	281	}
	282
	283	/* I2C-interface */
	284
cf4e9484 HV	285	static int indycam_command(struct i2c_client *client, unsigned int cmd,
	286	void *arg)
	287	{
	288	/* The old video_decoder interface just isn't enough,
	289	* so we'll use some custom commands. */
	290	switch (cmd) {
	291	case VIDIOC_G_CTRL:
	292	return indycam_get_control(client, arg);
	293
	294	case VIDIOC_S_CTRL:
	295	return indycam_set_control(client, arg);
	296
	297	default:
	298	return -EINVAL;
	299	}
	300
	301	return 0;
	302	}
	303
	304	static int indycam_probe(struct i2c_client *client,
	305	const struct i2c_device_id *id)
d203a7ec RB	306	{
	307	int err = 0;
	308	struct indycam *camera;
d203a7ec	309
cf4e9484 HV	310	v4l_info(client, "chip found @ 0x%x (%s)\n",
cf4e9484 HV	311	client->addr << 1, client->adapter->name);
d203a7ec	312
7408187d	313	camera = kzalloc(sizeof(struct indycam), GFP_KERNEL);
cf4e9484 HV	314	if (!camera)
cf4e9484 HV	315	return -ENOMEM;
d203a7ec	316
d203a7ec RB	317	i2c_set_clientdata(client, camera);
	318
	319	camera->client = client;
	320
a637a114 LM	321	camera->version = i2c_smbus_read_byte_data(client,
a637a114 LM	322	INDYCAM_REG_VERSION);
d203a7ec RB	323	if (camera->version != CAMERA_VERSION_INDY &&
d203a7ec RB	324	camera->version != CAMERA_VERSION_MOOSE) {
cf4e9484 HV	325	kfree(camera);
cf4e9484 HV	326	return -ENODEV;
d203a7ec	327	}
cf4e9484	328
d203a7ec RB	329	printk(KERN_INFO "IndyCam v%d.%d detected\n",
	330	INDYCAM_VERSION_MAJOR(camera->version),
	331	INDYCAM_VERSION_MINOR(camera->version));
	332
	333	indycam_regdump(client);
	334
	335	// initialize
a637a114	336	err = indycam_write_block(client, 0, sizeof(initseq), (u8 *)&initseq);
d203a7ec	337	if (err) {
c84e6036	338	printk(KERN_ERR "IndyCam initialization failed\n");
cf4e9484 HV	339	kfree(camera);
cf4e9484 HV	340	return -EIO;
d203a7ec RB	341	}
	342
	343	indycam_regdump(client);
	344
	345	// white balance
a637a114	346	err = indycam_write_reg(client, INDYCAM_REG_CONTROL,
d203a7ec RB	347	INDYCAM_CONTROL_AGCENA \| INDYCAM_CONTROL_AWBCTL);
d203a7ec RB	348	if (err) {
a637a114	349	printk(KERN_ERR "IndyCam: White balancing camera failed\n");
cf4e9484 HV	350	kfree(camera);
cf4e9484 HV	351	return -EIO;
d203a7ec RB	352	}
	353
	354	indycam_regdump(client);
	355
	356	printk(KERN_INFO "IndyCam initialized\n");
	357
	358	return 0;
d203a7ec RB	359	}
d203a7ec RB	360
cf4e9484	361	static int indycam_remove(struct i2c_client *client)
d203a7ec RB	362	{
	363	struct indycam *camera = i2c_get_clientdata(client);
	364
d203a7ec	365	kfree(camera);
d203a7ec RB	366	return 0;
	367	}
	368
cf4e9484	369	static int indycam_legacy_probe(struct i2c_adapter *adapter)
d203a7ec	370	{
cf4e9484	371	return adapter->id == I2C_HW_SGI_VINO;
d203a7ec RB	372	}
d203a7ec RB	373
cf4e9484 HV	374	static const struct i2c_device_id indycam_id[] = {
	375	{ "indycam", 0 },
	376	{ }
	377	};
	378	MODULE_DEVICE_TABLE(i2c, indycam_id);
	379
	380	static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	381	.name = "indycam",
	382	.driverid = I2C_DRIVERID_INDYCAM,
	383	.command = indycam_command,
	384	.probe = indycam_probe,
	385	.remove = indycam_remove,
	386	.legacy_probe = indycam_legacy_probe,
	387	.id_table = indycam_id,
d203a7ec	388	};