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d203a7eca8
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>
413 lines
9.7 KiB
C
413 lines
9.7 KiB
C
/*
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* indycam.c - Silicon Graphics IndyCam digital camera driver
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*
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* Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
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* Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/videodev.h>
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/* IndyCam decodes stream of photons into digital image representation ;-) */
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#include <linux/video_decoder.h>
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#include <linux/i2c.h>
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#include "indycam.h"
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//#define INDYCAM_DEBUG
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#define INDYCAM_MODULE_VERSION "0.0.3"
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MODULE_DESCRIPTION("SGI IndyCam driver");
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MODULE_VERSION(INDYCAM_MODULE_VERSION);
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MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
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MODULE_LICENSE("GPL");
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#ifdef INDYCAM_DEBUG
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#define dprintk(x...) printk("IndyCam: " x);
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#define indycam_regdump(client) indycam_regdump_debug(client)
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#else
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#define dprintk(x...)
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#define indycam_regdump(client)
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#endif
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#define VINO_ADAPTER (I2C_ALGO_SGI | I2C_HW_SGI_VINO)
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struct indycam {
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struct i2c_client *client;
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int version;
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};
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static struct i2c_driver i2c_driver_indycam;
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static const unsigned char initseq[] = {
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INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
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INDYCAM_SHUTTER_DEFAULT, /* INDYCAM_SHUTTER */
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INDYCAM_GAIN_DEFAULT, /* INDYCAM_GAIN */
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0x00, /* INDYCAM_BRIGHTNESS (read-only) */
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INDYCAM_RED_BALANCE_DEFAULT, /* INDYCAM_RED_BALANCE */
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INDYCAM_BLUE_BALANCE_DEFAULT, /* INDYCAM_BLUE_BALANCE */
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INDYCAM_RED_SATURATION_DEFAULT, /* INDYCAM_RED_SATURATION */
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INDYCAM_BLUE_SATURATION_DEFAULT,/* INDYCAM_BLUE_SATURATION */
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};
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/* IndyCam register handling */
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static int indycam_read_reg(struct i2c_client *client, unsigned char reg,
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unsigned char *value)
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{
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int ret;
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if (reg == INDYCAM_RESET) {
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dprintk("indycam_read_reg(): "
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"skipping write-only register %d\n", reg);
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*value = 0;
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return 0;
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}
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret < 0) {
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printk(KERN_ERR "IndyCam: indycam_read_reg(): read failed, "
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"register = 0x%02x\n", reg);
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return ret;
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}
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*value = (unsigned char)ret;
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return 0;
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}
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static int indycam_write_reg(struct i2c_client *client, unsigned char reg,
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unsigned char value)
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{
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int err;
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if ((reg == INDYCAM_BRIGHTNESS)
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|| (reg == INDYCAM_VERSION)) {
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dprintk("indycam_write_reg(): "
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"skipping read-only register %d\n", reg);
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return 0;
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}
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dprintk("Writing Reg %d = 0x%02x\n", reg, value);
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err = i2c_smbus_write_byte_data(client, reg, value);
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if (err) {
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printk(KERN_ERR "IndyCam: indycam_write_reg(): write failed, "
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"register = 0x%02x, value = 0x%02x\n", reg, value);
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}
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return err;
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}
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static int indycam_write_block(struct i2c_client *client, unsigned char reg,
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unsigned char length, unsigned char *data)
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{
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unsigned char i;
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int err;
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for (i = reg; i < length; i++) {
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err = indycam_write_reg(client, reg + i, data[i]);
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if (err)
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return err;
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}
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return 0;
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}
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/* Helper functions */
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#ifdef INDYCAM_DEBUG
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static void indycam_regdump_debug(struct i2c_client *client)
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{
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int i;
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unsigned char val;
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for (i = 0; i < 9; i++) {
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indycam_read_reg(client, i, &val);
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dprintk("Reg %d = 0x%02x\n", i, val);
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}
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}
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#endif
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static int indycam_get_controls(struct i2c_client *client,
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struct indycam_control *ctrl)
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{
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unsigned char ctrl_reg;
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indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
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ctrl->agc = (ctrl_reg & INDYCAM_CONTROL_AGCENA)
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? INDYCAM_VALUE_ENABLED
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: INDYCAM_VALUE_DISABLED;
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ctrl->awb = (ctrl_reg & INDYCAM_CONTROL_AWBCTL)
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? INDYCAM_VALUE_ENABLED
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: INDYCAM_VALUE_DISABLED;
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indycam_read_reg(client, INDYCAM_SHUTTER,
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(unsigned char *)&ctrl->shutter);
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indycam_read_reg(client, INDYCAM_GAIN,
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(unsigned char *)&ctrl->gain);
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indycam_read_reg(client, INDYCAM_RED_BALANCE,
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(unsigned char *)&ctrl->red_balance);
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indycam_read_reg(client, INDYCAM_BLUE_BALANCE,
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(unsigned char *)&ctrl->blue_balance);
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indycam_read_reg(client, INDYCAM_RED_SATURATION,
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(unsigned char *)&ctrl->red_saturation);
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indycam_read_reg(client, INDYCAM_BLUE_SATURATION,
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(unsigned char *)&ctrl->blue_saturation);
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indycam_read_reg(client, INDYCAM_GAMMA,
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(unsigned char *)&ctrl->gamma);
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return 0;
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}
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static int indycam_set_controls(struct i2c_client *client,
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struct indycam_control *ctrl)
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{
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unsigned char ctrl_reg;
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indycam_read_reg(client, INDYCAM_CONTROL, &ctrl_reg);
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if (ctrl->agc != INDYCAM_VALUE_UNCHANGED) {
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if (ctrl->agc)
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ctrl_reg |= INDYCAM_CONTROL_AGCENA;
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else
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ctrl_reg &= ~INDYCAM_CONTROL_AGCENA;
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}
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if (ctrl->awb != INDYCAM_VALUE_UNCHANGED) {
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if (ctrl->awb)
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ctrl_reg |= INDYCAM_CONTROL_AWBCTL;
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else
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ctrl_reg &= ~INDYCAM_CONTROL_AWBCTL;
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}
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indycam_write_reg(client, INDYCAM_CONTROL, ctrl_reg);
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if (ctrl->shutter >= 0)
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indycam_write_reg(client, INDYCAM_SHUTTER, ctrl->shutter);
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if (ctrl->gain >= 0)
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indycam_write_reg(client, INDYCAM_GAIN, ctrl->gain);
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if (ctrl->red_balance >= 0)
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indycam_write_reg(client, INDYCAM_RED_BALANCE,
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ctrl->red_balance);
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if (ctrl->blue_balance >= 0)
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indycam_write_reg(client, INDYCAM_BLUE_BALANCE,
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ctrl->blue_balance);
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if (ctrl->red_saturation >= 0)
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indycam_write_reg(client, INDYCAM_RED_SATURATION,
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ctrl->red_saturation);
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if (ctrl->blue_saturation >= 0)
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indycam_write_reg(client, INDYCAM_BLUE_SATURATION,
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ctrl->blue_saturation);
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if (ctrl->gamma >= 0)
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indycam_write_reg(client, INDYCAM_GAMMA, ctrl->gamma);
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return 0;
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}
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/* I2C-interface */
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static int indycam_attach(struct i2c_adapter *adap, int addr, int kind)
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{
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int err = 0;
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struct indycam *camera;
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struct i2c_client *client;
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printk(KERN_INFO "SGI IndyCam driver version %s\n",
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INDYCAM_MODULE_VERSION);
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client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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camera = kmalloc(sizeof(struct indycam), GFP_KERNEL);
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if (!camera) {
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err = -ENOMEM;
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goto out_free_client;
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}
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memset(client, 0, sizeof(struct i2c_client));
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memset(camera, 0, sizeof(struct indycam));
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client->addr = addr;
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client->adapter = adap;
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client->driver = &i2c_driver_indycam;
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client->flags = 0;
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strcpy(client->name, "IndyCam client");
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i2c_set_clientdata(client, camera);
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camera->client = client;
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err = i2c_attach_client(client);
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if (err)
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goto out_free_camera;
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camera->version = i2c_smbus_read_byte_data(client, INDYCAM_VERSION);
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if (camera->version != CAMERA_VERSION_INDY &&
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camera->version != CAMERA_VERSION_MOOSE) {
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err = -ENODEV;
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goto out_detach_client;
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}
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printk(KERN_INFO "IndyCam v%d.%d detected\n",
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INDYCAM_VERSION_MAJOR(camera->version),
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INDYCAM_VERSION_MINOR(camera->version));
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indycam_regdump(client);
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// initialize
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err = indycam_write_block(client, 0, sizeof(initseq),
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(unsigned char *)&initseq);
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if (err) {
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printk(KERN_ERR "IndyCam initalization failed\n");
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err = -EIO;
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goto out_detach_client;
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}
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indycam_regdump(client);
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// white balance
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err = indycam_write_reg(client, INDYCAM_CONTROL,
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INDYCAM_CONTROL_AGCENA | INDYCAM_CONTROL_AWBCTL);
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if (err) {
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printk(KERN_ERR "IndyCam white balance "
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"initialization failed\n");
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err = -EIO;
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goto out_detach_client;
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}
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indycam_regdump(client);
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printk(KERN_INFO "IndyCam initialized\n");
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return 0;
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out_detach_client:
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i2c_detach_client(client);
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out_free_camera:
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kfree(camera);
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out_free_client:
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kfree(client);
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return err;
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}
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static int indycam_probe(struct i2c_adapter *adap)
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{
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/* Indy specific crap */
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if (adap->id == VINO_ADAPTER)
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return indycam_attach(adap, INDYCAM_ADDR, 0);
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/* Feel free to add probe here :-) */
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return -ENODEV;
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}
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static int indycam_detach(struct i2c_client *client)
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{
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struct indycam *camera = i2c_get_clientdata(client);
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i2c_detach_client(client);
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kfree(camera);
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kfree(client);
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return 0;
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}
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static int indycam_command(struct i2c_client *client, unsigned int cmd,
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void *arg)
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{
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// struct indycam *camera = i2c_get_clientdata(client);
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/* The old video_decoder interface just isn't enough,
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* so we'll use some custom commands. */
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switch (cmd) {
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case DECODER_GET_CAPABILITIES: {
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struct video_decoder_capability *cap = arg;
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cap->flags = VIDEO_DECODER_NTSC;
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cap->inputs = 1;
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cap->outputs = 1;
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break;
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}
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case DECODER_GET_STATUS: {
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int *iarg = arg;
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*iarg = DECODER_STATUS_GOOD | DECODER_STATUS_NTSC |
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DECODER_STATUS_COLOR;
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break;
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}
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case DECODER_SET_NORM: {
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int *iarg = arg;
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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break;
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default:
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return -EINVAL;
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}
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break;
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}
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case DECODER_SET_INPUT: {
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int *iarg = arg;
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if (*iarg != 0)
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return -EINVAL;
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break;
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}
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case DECODER_SET_OUTPUT: {
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int *iarg = arg;
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if (*iarg != 0)
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return -EINVAL;
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break;
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}
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case DECODER_ENABLE_OUTPUT: {
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/* Always enabled */
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break;
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}
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case DECODER_SET_PICTURE: {
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// struct video_picture *pic = arg;
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/* TODO: convert values for indycam_set_controls() */
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break;
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}
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case DECODER_INDYCAM_GET_CONTROLS: {
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struct indycam_control *ctrl = arg;
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indycam_get_controls(client, ctrl);
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}
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case DECODER_INDYCAM_SET_CONTROLS: {
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struct indycam_control *ctrl = arg;
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indycam_set_controls(client, ctrl);
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}
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default:
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return -EINVAL;
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}
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return 0;
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}
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static struct i2c_driver i2c_driver_indycam = {
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.owner = THIS_MODULE,
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.name = "indycam",
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.id = I2C_DRIVERID_INDYCAM,
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = indycam_probe,
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.detach_client = indycam_detach,
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.command = indycam_command,
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};
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static int __init indycam_init(void)
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{
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return i2c_add_driver(&i2c_driver_indycam);
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}
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static void __exit indycam_exit(void)
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{
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i2c_del_driver(&i2c_driver_indycam);
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}
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module_init(indycam_init);
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module_exit(indycam_exit);
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