linux/drivers/media/video/indycam.c
Ralf Baechle d203a7eca8 [PATCH] Indycam / VINO drivers
Rewrite of the Indycam / VINO video v4l2 drivers for the SGI Indy.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Mikael Nousiainen <tmnousia@cc.hut.fi>
Cc: <video4linux-list@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:58:01 -07:00

413 lines
9.7 KiB
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);