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/*
* cx18 gpio functions
*
* Derived from ivtv-gpio.c
*
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA
*/
#include "cx18-driver.h"
#include "cx18-cards.h"
#include "cx18-gpio.h"
#include "tuner-xc2028.h"
/********************* GPIO stuffs *********************/
/* GPIO registers */
#define CX18_REG_GPIO_IN 0xc72010
#define CX18_REG_GPIO_OUT1 0xc78100
#define CX18_REG_GPIO_DIR1 0xc78108
#define CX18_REG_GPIO_OUT2 0xc78104
#define CX18_REG_GPIO_DIR2 0xc7810c
/*
* HVR-1600 GPIO pins, courtesy of Hauppauge:
*
* gpio0: zilog ir process reset pin
* gpio1: zilog programming pin (you should never use this)
* gpio12: cx24227 reset pin
* gpio13: cs5345 reset pin
*/
void cx18_gpio_init(struct cx18 *cx)
{
if (cx->card->gpio_init.direction == 0)
return;
CX18_DEBUG_INFO("GPIO initial dir: %08x out: %08x\n",
read_reg(CX18_REG_GPIO_DIR1), read_reg(CX18_REG_GPIO_OUT1));
/* init output data then direction */
write_reg(cx->card->gpio_init.direction << 16, CX18_REG_GPIO_DIR1);
write_reg(0, CX18_REG_GPIO_DIR2);
write_reg((cx->card->gpio_init.direction << 16) |
cx->card->gpio_init.initial_value, CX18_REG_GPIO_OUT1);
write_reg(0, CX18_REG_GPIO_OUT2);
}
/* Xceive tuner reset function */
int cx18_reset_tuner_gpio(void *dev, int cmd, int value)
{
struct i2c_algo_bit_data *algo = dev;
struct cx18 *cx = algo->data;
/* int curdir, curout;*/
if (cmd != XC2028_TUNER_RESET)
return 0;
CX18_DEBUG_INFO("Resetting tuner\n");
return 0;
}
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