162 lines
4.3 KiB
C
162 lines
4.3 KiB
C
/*
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* lnbp21.c - driver for lnb supply and control ic lnbp21
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*
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* Copyright (C) 2006 Oliver Endriss
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* Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
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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 http://www.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 "dvb_frontend.h"
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#include "lnbp21.h"
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#include "lnbh24.h"
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struct lnbp21 {
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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 lnbp21_set_voltage(struct dvb_frontend *fe,
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fe_sec_voltage_t voltage)
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{
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struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
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struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
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.buf = &lnbp21->config,
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.len = sizeof(lnbp21->config) };
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lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
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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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lnbp21->config |= LNBP21_EN;
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break;
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case SEC_VOLTAGE_18:
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lnbp21->config |= (LNBP21_EN | LNBP21_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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lnbp21->config |= lnbp21->override_or;
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lnbp21->config &= lnbp21->override_and;
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return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
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}
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static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
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{
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struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
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struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
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.buf = &lnbp21->config,
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.len = sizeof(lnbp21->config) };
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if (arg)
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lnbp21->config |= LNBP21_LLC;
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else
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lnbp21->config &= ~LNBP21_LLC;
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lnbp21->config |= lnbp21->override_or;
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lnbp21->config &= lnbp21->override_and;
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return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
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}
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static void lnbp21_release(struct dvb_frontend *fe)
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{
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/* LNBP power off */
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lnbp21_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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static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c, u8 override_set,
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u8 override_clear, u8 i2c_addr, u8 config)
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{
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struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
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if (!lnbp21)
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return NULL;
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/* default configuration */
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lnbp21->config = config;
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lnbp21->i2c = i2c;
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lnbp21->i2c_addr = i2c_addr;
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fe->sec_priv = lnbp21;
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/* bits which should be forced to '1' */
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lnbp21->override_or = override_set;
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/* bits which should be forced to '0' */
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lnbp21->override_and = ~override_clear;
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/* detect if it is present or not */
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if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
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kfree(lnbp21);
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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 = lnbp21_release;
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/* override frontend ops */
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fe->ops.set_voltage = lnbp21_set_voltage;
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fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
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printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr);
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return fe;
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}
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struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c, u8 override_set,
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u8 override_clear, u8 i2c_addr)
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{
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return lnbx2x_attach(fe, i2c, override_set, override_clear,
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i2c_addr, LNBH24_TTX);
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}
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EXPORT_SYMBOL(lnbh24_attach);
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struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c, u8 override_set,
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u8 override_clear)
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{
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return lnbx2x_attach(fe, i2c, override_set, override_clear,
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0x08, LNBP21_ISEL);
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}
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EXPORT_SYMBOL(lnbp21_attach);
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MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24");
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MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin");
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MODULE_LICENSE("GPL");
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