142 lines
3.7 KiB
C
142 lines
3.7 KiB
C
/*
|
|
* isl6421.h - driver for lnb supply and control ic ISL6421
|
|
*
|
|
* Copyright (C) 2006 Andrew de Quincey
|
|
* 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/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "dvb_frontend.h"
|
|
#include "isl6421.h"
|
|
|
|
struct isl6421 {
|
|
u8 config;
|
|
u8 override_or;
|
|
u8 override_and;
|
|
struct i2c_adapter *i2c;
|
|
u8 i2c_addr;
|
|
};
|
|
|
|
static int isl6421_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
|
|
{
|
|
struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
|
|
struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
|
|
.buf = &isl6421->config,
|
|
.len = sizeof(isl6421->config) };
|
|
|
|
isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
|
|
|
|
switch(voltage) {
|
|
case SEC_VOLTAGE_OFF:
|
|
break;
|
|
case SEC_VOLTAGE_13:
|
|
isl6421->config |= ISL6421_EN1;
|
|
break;
|
|
case SEC_VOLTAGE_18:
|
|
isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
};
|
|
|
|
isl6421->config |= isl6421->override_or;
|
|
isl6421->config &= isl6421->override_and;
|
|
|
|
return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
|
|
}
|
|
|
|
static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
|
|
{
|
|
struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
|
|
struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
|
|
.buf = &isl6421->config,
|
|
.len = sizeof(isl6421->config) };
|
|
|
|
if (arg)
|
|
isl6421->config |= ISL6421_LLC1;
|
|
else
|
|
isl6421->config &= ~ISL6421_LLC1;
|
|
|
|
isl6421->config |= isl6421->override_or;
|
|
isl6421->config &= isl6421->override_and;
|
|
|
|
return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
|
|
}
|
|
|
|
static void isl6421_release(struct dvb_frontend *fe)
|
|
{
|
|
/* power off */
|
|
isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
|
|
|
|
/* free */
|
|
kfree(fe->sec_priv);
|
|
fe->sec_priv = NULL;
|
|
}
|
|
|
|
struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
|
|
u8 override_set, u8 override_clear)
|
|
{
|
|
struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
|
|
if (!isl6421)
|
|
return NULL;
|
|
|
|
/* default configuration */
|
|
isl6421->config = ISL6421_ISEL1;
|
|
isl6421->i2c = i2c;
|
|
isl6421->i2c_addr = i2c_addr;
|
|
fe->sec_priv = isl6421;
|
|
|
|
/* bits which should be forced to '1' */
|
|
isl6421->override_or = override_set;
|
|
|
|
/* bits which should be forced to '0' */
|
|
isl6421->override_and = ~override_clear;
|
|
|
|
/* detect if it is present or not */
|
|
if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {
|
|
kfree(isl6421);
|
|
fe->sec_priv = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
/* install release callback */
|
|
fe->ops.release_sec = isl6421_release;
|
|
|
|
/* override frontend ops */
|
|
fe->ops.set_voltage = isl6421_set_voltage;
|
|
fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
|
|
|
|
return fe;
|
|
}
|
|
EXPORT_SYMBOL(isl6421_attach);
|
|
|
|
MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
|
|
MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
|
|
MODULE_LICENSE("GPL");
|