472 строки
10 KiB
C
472 строки
10 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/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/sched.h>
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#include <linux/slab.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_MODULE_VERSION "0.0.5"
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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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// #define INDYCAM_DEBUG
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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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struct indycam {
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struct i2c_client *client;
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u8 version;
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};
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static struct i2c_driver i2c_driver_indycam;
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static const u8 initseq[] = {
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INDYCAM_CONTROL_AGCENA, /* INDYCAM_CONTROL */
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INDYCAM_SHUTTER_60, /* 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, u8 reg, u8 *value)
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{
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int ret;
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if (reg == INDYCAM_REG_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 = (u8)ret;
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return 0;
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}
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static int indycam_write_reg(struct i2c_client *client, u8 reg, u8 value)
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{
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int err;
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if ((reg == INDYCAM_REG_BRIGHTNESS)
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|| (reg == INDYCAM_REG_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, u8 reg,
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u8 length, u8 *data)
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{
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int i, err;
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for (i = 0; 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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u8 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_control(struct i2c_client *client,
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struct indycam_control *ctrl)
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{
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struct indycam *camera = i2c_get_clientdata(client);
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u8 reg;
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int ret = 0;
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switch (ctrl->type) {
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case INDYCAM_CONTROL_AGC:
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case INDYCAM_CONTROL_AWB:
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ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®);
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if (ret)
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return -EIO;
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if (ctrl->type == INDYCAM_CONTROL_AGC)
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ctrl->value = (reg & INDYCAM_CONTROL_AGCENA)
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? 1 : 0;
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else
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ctrl->value = (reg & INDYCAM_CONTROL_AWBCTL)
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? 1 : 0;
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break;
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case INDYCAM_CONTROL_SHUTTER:
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ret = indycam_read_reg(client, INDYCAM_REG_SHUTTER, ®);
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if (ret)
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return -EIO;
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ctrl->value = ((s32)reg == 0x00) ? 0xff : ((s32)reg - 1);
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break;
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case INDYCAM_CONTROL_GAIN:
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ret = indycam_read_reg(client, INDYCAM_REG_GAIN, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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break;
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case INDYCAM_CONTROL_RED_BALANCE:
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ret = indycam_read_reg(client, INDYCAM_REG_RED_BALANCE, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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break;
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case INDYCAM_CONTROL_BLUE_BALANCE:
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ret = indycam_read_reg(client, INDYCAM_REG_BLUE_BALANCE, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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break;
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case INDYCAM_CONTROL_RED_SATURATION:
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ret = indycam_read_reg(client,
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INDYCAM_REG_RED_SATURATION, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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break;
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case INDYCAM_CONTROL_BLUE_SATURATION:
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ret = indycam_read_reg(client,
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INDYCAM_REG_BLUE_SATURATION, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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break;
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case INDYCAM_CONTROL_GAMMA:
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if (camera->version == CAMERA_VERSION_MOOSE) {
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ret = indycam_read_reg(client,
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INDYCAM_REG_GAMMA, ®);
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if (ret)
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return -EIO;
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ctrl->value = (s32)reg;
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} else {
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ctrl->value = INDYCAM_GAMMA_DEFAULT;
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}
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static int indycam_set_control(struct i2c_client *client,
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struct indycam_control *ctrl)
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{
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struct indycam *camera = i2c_get_clientdata(client);
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u8 reg;
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int ret = 0;
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switch (ctrl->type) {
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case INDYCAM_CONTROL_AGC:
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case INDYCAM_CONTROL_AWB:
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ret = indycam_read_reg(client, INDYCAM_REG_CONTROL, ®);
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if (ret)
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break;
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if (ctrl->type == INDYCAM_CONTROL_AGC) {
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if (ctrl->value)
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reg |= INDYCAM_CONTROL_AGCENA;
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else
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reg &= ~INDYCAM_CONTROL_AGCENA;
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} else {
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if (ctrl->value)
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reg |= INDYCAM_CONTROL_AWBCTL;
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else
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reg &= ~INDYCAM_CONTROL_AWBCTL;
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}
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ret = indycam_write_reg(client, INDYCAM_REG_CONTROL, reg);
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break;
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case INDYCAM_CONTROL_SHUTTER:
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reg = (ctrl->value == 0xff) ? 0x00 : (ctrl->value + 1);
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ret = indycam_write_reg(client, INDYCAM_REG_SHUTTER, reg);
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break;
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case INDYCAM_CONTROL_GAIN:
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ret = indycam_write_reg(client, INDYCAM_REG_GAIN, ctrl->value);
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break;
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case INDYCAM_CONTROL_RED_BALANCE:
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ret = indycam_write_reg(client, INDYCAM_REG_RED_BALANCE,
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ctrl->value);
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break;
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case INDYCAM_CONTROL_BLUE_BALANCE:
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ret = indycam_write_reg(client, INDYCAM_REG_BLUE_BALANCE,
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ctrl->value);
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break;
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case INDYCAM_CONTROL_RED_SATURATION:
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ret = indycam_write_reg(client, INDYCAM_REG_RED_SATURATION,
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ctrl->value);
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break;
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case INDYCAM_CONTROL_BLUE_SATURATION:
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ret = indycam_write_reg(client, INDYCAM_REG_BLUE_SATURATION,
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ctrl->value);
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break;
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case INDYCAM_CONTROL_GAMMA:
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if (camera->version == CAMERA_VERSION_MOOSE) {
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ret = indycam_write_reg(client, INDYCAM_REG_GAMMA,
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ctrl->value);
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}
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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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 = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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camera = kzalloc(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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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,
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INDYCAM_REG_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), (u8 *)&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_REG_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 balancing camera 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 == I2C_HW_SGI_VINO)
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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_CONTROL: {
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return indycam_get_control(client, arg);
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}
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case DECODER_INDYCAM_SET_CONTROL: {
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return indycam_set_control(client, arg);
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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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.driver = {
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.name = "indycam",
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},
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.id = I2C_DRIVERID_INDYCAM,
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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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