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