Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 21c28582 authored by Andrew de Quincey's avatar Andrew de Quincey Committed by Mauro Carvalho Chehab
Browse files

V4L/DVB (3933): Add isl6421 module 



Driver for the ISL6421 LNB chip

Signed-off-by: default avatarAndrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent d020542f

drivers/media/dvb/frontends/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -226,4 +226,10 @@ config DVB_LNBP21 
	help

	  An SEC control chip.



config DVB_ISL6421

	tristate "ISL6421 SEC controller"

	depends on DVB_CORE

	help

	  An SEC control chip.



endmenu

drivers/media/dvb/frontends/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -32,3 +32,4 @@ obj-$(CONFIG_DVB_S5H1420) += s5h1420.o 
obj-$(CONFIG_DVB_LGDT330X) += lgdt330x.o

obj-$(CONFIG_DVB_CX24123) += cx24123.o

obj-$(CONFIG_DVB_LNBP21) += lnbp21.o

obj-$(CONFIG_DVB_ISL6421) += isl6421.o

drivers/media/dvb/frontends/isl6421.c

0 → 100644
+149 −0
Original line number Diff line number Diff line 
/*

 * isl6421.h - driver for lnb supply and control ic ISL6421

 *

 * Copyright (C) 2006 Andrew de Quincey

 * Copyright (C) 2006 Oliver Endriss

 *

 * 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.

 *

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html

 *

 *

 * the project's page is at http://www.linuxtv.org

 */

#include <linux/delay.h>

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/string.h>

#include <linux/slab.h>



#include "dvb_frontend.h"

#include "isl6421.h"



struct isl6421 {

	u8			config;

	u8			override_or;

	u8			override_and;

	struct i2c_adapter	*i2c;

	u8			i2c_addr;

	void			(*release_chain)(struct dvb_frontend* fe);

};



static int isl6421_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)

{

	struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv;

	struct i2c_msg msg = {	.addr = isl6421->i2c_addr, .flags = 0,

				.buf = &isl6421->config,

				.len = sizeof(isl6421->config) };



	isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);



	switch(voltage) {

	case SEC_VOLTAGE_OFF:

		break;

	case SEC_VOLTAGE_13:

		isl6421->config |= ISL6421_EN1;

		break;

	case SEC_VOLTAGE_18:

		isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);

		break;

	default:

		return -EINVAL;

	};



	isl6421->config |= isl6421->override_or;

	isl6421->config &= isl6421->override_and;



	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;

}



static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)

{

	struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv;

	struct i2c_msg msg = {	.addr = isl6421->i2c_addr, .flags = 0,

				.buf = &isl6421->config,

				.len = sizeof(isl6421->config) };



	if (arg)

		isl6421->config |= ISL6421_LLC1;

	else

		isl6421->config &= ~ISL6421_LLC1;



	isl6421->config |= isl6421->override_or;

	isl6421->config &= isl6421->override_and;



	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;

}



static void isl6421_release(struct dvb_frontend *fe)

{

	struct isl6421 *isl6421 = (struct isl6421 *) fe->misc_priv;



	/* power off */

	isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);



	/* free data & call next release routine */

	fe->ops->release = isl6421->release_chain;

	kfree(fe->misc_priv);

	fe->misc_priv = NULL;

	if (fe->ops->release)

		fe->ops->release(fe);

}



int isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,

		   u8 override_set, u8 override_clear)

{

	struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);

	if (!isl6421)

		return -ENOMEM;



	/* default configuration */

	isl6421->config = ISL6421_ISEL1;

	isl6421->i2c = i2c;

	isl6421->i2c_addr = i2c_addr;

	fe->misc_priv = isl6421;



	/* bits which should be forced to '1' */

	isl6421->override_or = override_set;



	/* bits which should be forced to '0' */

	isl6421->override_and = ~override_clear;



	/* detect if it is present or not */

	if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {

		kfree(isl6421);

		fe->misc_priv = NULL;

		return -EIO;

	}



	/* install release callback */

	isl6421->release_chain = fe->ops->release;

	fe->ops->release = isl6421_release;



	/* override frontend ops */

	fe->ops->set_voltage = isl6421_set_voltage;

	fe->ops->enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;



	return 0;

}

EXPORT_SYMBOL(isl6421_attach);



MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");

MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");

MODULE_LICENSE("GPL");

drivers/media/dvb/frontends/isl6421.h

0 → 100644
+46 −0
Original line number Diff line number Diff line 
/*

 * isl6421.h - driver for lnb supply and control ic ISL6421

 *

 * Copyright (C) 2006 Andrew de Quincey

 * Copyright (C) 2006 Oliver Endriss

 *

 * 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.

 *

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html

 *

 *

 * the project's page is at http://www.linuxtv.org

 */



#ifndef _ISL6421_H

#define _ISL6421_H



#include <linux/dvb/frontend.h>



/* system register bits */

#define ISL6421_OLF1	0x01

#define ISL6421_EN1	0x02

#define ISL6421_VSEL1	0x04

#define ISL6421_LLC1	0x08

#define ISL6421_ENT1	0x10

#define ISL6421_ISEL1	0x20

#define ISL6421_DCL	0x40



/* override_set and override_clear control which system register bits (above) to always set & clear */

extern int isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,

			  u8 override_set, u8 override_clear);



#endif