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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* isl6405.c - driver for dual lnb supply and control ic ISL6405
*
* Copyright (C) 2008 Hartmut Hackmann
* Copyright (C) 2006 Oliver Endriss
*
* the project's page is at https://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 <media/dvb_frontend.h>
#include "isl6405.h"
struct isl6405 {
u8 config;
u8 override_or;
u8 override_and;
struct i2c_adapter *i2c;
u8 i2c_addr;
};
static int isl6405_set_voltage(struct dvb_frontend *fe,
enum fe_sec_voltage voltage)
{
struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
.buf = &isl6405->config,
.len = sizeof(isl6405->config) };
if (isl6405->override_or & 0x80) {
isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
switch (voltage) {
case SEC_VOLTAGE_OFF:
break;
case SEC_VOLTAGE_13:
isl6405->config |= ISL6405_EN2;
break;
case SEC_VOLTAGE_18:
isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
break;
default:
return -EINVAL;
}
} else {
isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
switch (voltage) {
case SEC_VOLTAGE_OFF:
break;
case SEC_VOLTAGE_13:
isl6405->config |= ISL6405_EN1;
break;
case SEC_VOLTAGE_18:
isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
break;
default:
return -EINVAL;
}
}
isl6405->config |= isl6405->override_or;
isl6405->config &= isl6405->override_and;
return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
.buf = &isl6405->config,
.len = sizeof(isl6405->config) };
if (isl6405->override_or & 0x80) {
if (arg)
isl6405->config |= ISL6405_LLC2;
else
isl6405->config &= ~ISL6405_LLC2;
} else {
if (arg)
isl6405->config |= ISL6405_LLC1;
else
isl6405->config &= ~ISL6405_LLC1;
}
isl6405->config |= isl6405->override_or;
isl6405->config &= isl6405->override_and;
return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
}
static void isl6405_release(struct dvb_frontend *fe)
{
/* power off */
isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
/* free */
kfree(fe->sec_priv);
fe->sec_priv = NULL;
}
struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
u8 i2c_addr, u8 override_set, u8 override_clear)
{
struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
if (!isl6405)
return NULL;
/* default configuration */
if (override_set & 0x80)
isl6405->config = ISL6405_ISEL2;
else
isl6405->config = ISL6405_ISEL1;
isl6405->i2c = i2c;
isl6405->i2c_addr = i2c_addr;
fe->sec_priv = isl6405;
/* bits which should be forced to '1' */
isl6405->override_or = override_set;
/* bits which should be forced to '0' */
isl6405->override_and = ~override_clear;
/* detect if it is present or not */
if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
kfree(isl6405);
fe->sec_priv = NULL;
return NULL;
}
/* install release callback */
fe->ops.release_sec = isl6405_release;
/* override frontend ops */
fe->ops.set_voltage = isl6405_set_voltage;
fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
return fe;
}
EXPORT_SYMBOL_GPL(isl6405_attach);
MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
MODULE_LICENSE("GPL");
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