Orange Pi5 kernel

// 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(isl6405_attach);
 
MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
MODULE_LICENSE("GPL");