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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