mirror of
https://github.com/edk2-porting/linux-next.git
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991ce92f8d
While https was always supported on linuxtv.org, only in Dec 3 2015 the website is using valid certificates. As we're planning to drop pure http support on some future, change all references at the media subsystem to point to the https URL instead. Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/*
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* lnbp22.h - driver for lnb supply and control ic lnbp22
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*
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* Copyright (C) 2006 Dominik Kuhlen
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* Based on lnbp21 driver
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
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*
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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/moduleparam.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include "dvb_frontend.h"
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#include "lnbp22.h"
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
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#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
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struct lnbp22 {
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u8 config[4];
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struct i2c_adapter *i2c;
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};
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static int lnbp22_set_voltage(struct dvb_frontend *fe,
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enum fe_sec_voltage voltage)
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{
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struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
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struct i2c_msg msg = {
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.addr = 0x08,
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.flags = 0,
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.buf = (char *)&lnbp22->config,
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.len = sizeof(lnbp22->config),
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};
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dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
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SEC_VOLTAGE_18, SEC_VOLTAGE_13);
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lnbp22->config[3] = 0x60; /* Power down */
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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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lnbp22->config[3] |= LNBP22_EN;
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break;
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case SEC_VOLTAGE_18:
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lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
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break;
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default:
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return -EINVAL;
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}
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dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
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return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
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}
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static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
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{
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struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
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struct i2c_msg msg = {
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.addr = 0x08,
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.flags = 0,
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.buf = (char *)&lnbp22->config,
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.len = sizeof(lnbp22->config),
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};
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dprintk(1, "%s: %d\n", __func__, (int)arg);
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if (arg)
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lnbp22->config[3] |= LNBP22_LLC;
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else
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lnbp22->config[3] &= ~LNBP22_LLC;
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return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
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}
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static void lnbp22_release(struct dvb_frontend *fe)
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{
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dprintk(1, "%s\n", __func__);
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/* LNBP power off */
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lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
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/* free data */
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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 *lnbp22_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c)
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{
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struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
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if (!lnbp22)
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return NULL;
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/* default configuration */
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lnbp22->config[0] = 0x00; /* ? */
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lnbp22->config[1] = 0x28; /* ? */
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lnbp22->config[2] = 0x48; /* ? */
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lnbp22->config[3] = 0x60; /* Power down */
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lnbp22->i2c = i2c;
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fe->sec_priv = lnbp22;
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/* detect if it is present or not */
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if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
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dprintk(0, "%s LNBP22 not found\n", __func__);
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kfree(lnbp22);
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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 = lnbp22_release;
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/* override frontend ops */
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fe->ops.set_voltage = lnbp22_set_voltage;
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fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
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return fe;
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}
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EXPORT_SYMBOL(lnbp22_attach);
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MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
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MODULE_AUTHOR("Dominik Kuhlen");
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MODULE_LICENSE("GPL");
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