133 lines
3.1 KiB
C
133 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* lnbp22.h - driver for lnb supply and control ic lnbp22
|
|
*
|
|
* Copyright (C) 2006 Dominik Kuhlen
|
|
* Based on lnbp21 driver
|
|
*
|
|
* 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/moduleparam.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <media/dvb_frontend.h>
|
|
#include "lnbp22.h"
|
|
|
|
static int debug;
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
|
|
|
|
|
|
#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
|
|
|
|
struct lnbp22 {
|
|
u8 config[4];
|
|
struct i2c_adapter *i2c;
|
|
};
|
|
|
|
static int lnbp22_set_voltage(struct dvb_frontend *fe,
|
|
enum fe_sec_voltage voltage)
|
|
{
|
|
struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
|
|
struct i2c_msg msg = {
|
|
.addr = 0x08,
|
|
.flags = 0,
|
|
.buf = (char *)&lnbp22->config,
|
|
.len = sizeof(lnbp22->config),
|
|
};
|
|
|
|
dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
|
|
SEC_VOLTAGE_18, SEC_VOLTAGE_13);
|
|
|
|
lnbp22->config[3] = 0x60; /* Power down */
|
|
switch (voltage) {
|
|
case SEC_VOLTAGE_OFF:
|
|
break;
|
|
case SEC_VOLTAGE_13:
|
|
lnbp22->config[3] |= LNBP22_EN;
|
|
break;
|
|
case SEC_VOLTAGE_18:
|
|
lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
|
|
return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
|
|
}
|
|
|
|
static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
|
|
{
|
|
struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
|
|
struct i2c_msg msg = {
|
|
.addr = 0x08,
|
|
.flags = 0,
|
|
.buf = (char *)&lnbp22->config,
|
|
.len = sizeof(lnbp22->config),
|
|
};
|
|
|
|
dprintk(1, "%s: %d\n", __func__, (int)arg);
|
|
if (arg)
|
|
lnbp22->config[3] |= LNBP22_LLC;
|
|
else
|
|
lnbp22->config[3] &= ~LNBP22_LLC;
|
|
|
|
return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
|
|
}
|
|
|
|
static void lnbp22_release(struct dvb_frontend *fe)
|
|
{
|
|
dprintk(1, "%s\n", __func__);
|
|
/* LNBP power off */
|
|
lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
|
|
|
|
/* free data */
|
|
kfree(fe->sec_priv);
|
|
fe->sec_priv = NULL;
|
|
}
|
|
|
|
struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
|
|
if (!lnbp22)
|
|
return NULL;
|
|
|
|
/* default configuration */
|
|
lnbp22->config[0] = 0x00; /* ? */
|
|
lnbp22->config[1] = 0x28; /* ? */
|
|
lnbp22->config[2] = 0x48; /* ? */
|
|
lnbp22->config[3] = 0x60; /* Power down */
|
|
lnbp22->i2c = i2c;
|
|
fe->sec_priv = lnbp22;
|
|
|
|
/* detect if it is present or not */
|
|
if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
|
|
dprintk(0, "%s LNBP22 not found\n", __func__);
|
|
kfree(lnbp22);
|
|
fe->sec_priv = NULL;
|
|
return NULL;
|
|
}
|
|
|
|
/* install release callback */
|
|
fe->ops.release_sec = lnbp22_release;
|
|
|
|
/* override frontend ops */
|
|
fe->ops.set_voltage = lnbp22_set_voltage;
|
|
fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
|
|
|
|
return fe;
|
|
}
|
|
EXPORT_SYMBOL(lnbp22_attach);
|
|
|
|
MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
|
|
MODULE_AUTHOR("Dominik Kuhlen");
|
|
MODULE_LICENSE("GPL");
|