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/*
* lnbp21.h - driver for lnb supply and control ic lnbp21
*
* Copyright (C) 2006 Oliver Endriss
*
* 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.
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
*
*
* the project's page is at http://www.linuxtv.org
*/
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/slab.h>
#include "dvb_frontend.h"
#include "lnbp21.h"
struct lnbp21 {
u8 config;
u8 override_or;
u8 override_and;
struct i2c_adapter *i2c;
void (*release_chain)(struct dvb_frontend* fe);
};
static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
{
struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
struct i2c_msg msg = { .addr = 0x08, .flags = 0,
.buf = &lnbp21->config,
.len = sizeof(lnbp21->config) };
lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
switch(voltage) {
case SEC_VOLTAGE_OFF:
break;
case SEC_VOLTAGE_13:
lnbp21->config |= LNBP21_EN;
break;
case SEC_VOLTAGE_18:
lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
break;
default:
return -EINVAL;
};
lnbp21->config |= lnbp21->override_or;
lnbp21->config &= lnbp21->override_and;
return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
struct i2c_msg msg = { .addr = 0x08, .flags = 0,
.buf = &lnbp21->config,
.len = sizeof(lnbp21->config) };
if (arg)
lnbp21->config |= LNBP21_LLC;
else
lnbp21->config &= ~LNBP21_LLC;
lnbp21->config |= lnbp21->override_or;
lnbp21->config &= lnbp21->override_and;
return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static void lnbp21_release(struct dvb_frontend *fe)
{
struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
/* LNBP power off */
lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
/* free data & call next release routine */
fe->ops.release = lnbp21->release_chain;
kfree(fe->misc_priv);
fe->misc_priv = NULL;
if (fe->ops.release)
fe->ops.release(fe);
}
int lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear)
{
struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
if (!lnbp21)
return -ENOMEM;
/* default configuration */
lnbp21->config = LNBP21_ISEL;
lnbp21->i2c = i2c;
fe->misc_priv = lnbp21;
/* bits which should be forced to '1' */
lnbp21->override_or = override_set;
/* bits which should be forced to '0' */
lnbp21->override_and = ~override_clear;
/* detect if it is present or not */
if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
kfree(lnbp21);
fe->misc_priv = NULL;
return -EIO;
}
/* install release callback */
lnbp21->release_chain = fe->ops.release;
fe->ops.release = lnbp21_release;
/* override frontend ops */
fe->ops.set_voltage = lnbp21_set_voltage;
fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
return 0;
}
EXPORT_SYMBOL(lnbp21_attach);
MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21");
MODULE_AUTHOR("Oliver Endriss");
MODULE_LICENSE("GPL");
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