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Based on 1 normalized pattern(s): 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 to obtain the license point your browser to http www gnu org copyleft gpl html extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 26 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091650.572604764@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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