[linux-2.6-block.git] / drivers / media / dvb-frontends / isl6405.c

/*
 * isl6405.c - driver for dual lnb supply and control ic ISL6405
 *
 * Copyright (C) 2008 Hartmut Hackmann
 * 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.
 *
 * To obtain the license, point your browser to
 * http://www.gnu.org/copyleft/gpl.html
 *
 *
 * the project's page is at https://linuxtv.org
 */
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>

#include <media/dvb_frontend.h>
#include "isl6405.h"

struct isl6405 {
	u8			config;
	u8			override_or;
	u8			override_and;
	struct i2c_adapter	*i2c;
	u8			i2c_addr;
};

static int isl6405_set_voltage(struct dvb_frontend *fe,
			       enum fe_sec_voltage voltage)
{
	struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
	struct i2c_msg msg = {	.addr = isl6405->i2c_addr, .flags = 0,
				.buf = &isl6405->config,
				.len = sizeof(isl6405->config) };

	if (isl6405->override_or & 0x80) {
		isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
		switch (voltage) {
		case SEC_VOLTAGE_OFF:
			break;
		case SEC_VOLTAGE_13:
			isl6405->config |= ISL6405_EN2;
			break;
		case SEC_VOLTAGE_18:
			isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
			break;
		default:
			return -EINVAL;
		}
	} else {
		isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
		switch (voltage) {
		case SEC_VOLTAGE_OFF:
			break;
		case SEC_VOLTAGE_13:
			isl6405->config |= ISL6405_EN1;
			break;
		case SEC_VOLTAGE_18:
			isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
			break;
		default:
			return -EINVAL;
		}
	}
	isl6405->config |= isl6405->override_or;
	isl6405->config &= isl6405->override_and;

	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
}

static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
	struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
	struct i2c_msg msg = {	.addr = isl6405->i2c_addr, .flags = 0,
				.buf = &isl6405->config,
				.len = sizeof(isl6405->config) };

	if (isl6405->override_or & 0x80) {
		if (arg)
			isl6405->config |= ISL6405_LLC2;
		else
			isl6405->config &= ~ISL6405_LLC2;
	} else {
		if (arg)
			isl6405->config |= ISL6405_LLC1;
		else
			isl6405->config &= ~ISL6405_LLC1;
	}
	isl6405->config |= isl6405->override_or;
	isl6405->config &= isl6405->override_and;

	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
}

static void isl6405_release(struct dvb_frontend *fe)
{
	/* power off */
	isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);

	/* free */
	kfree(fe->sec_priv);
	fe->sec_priv = NULL;
}

struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
				    u8 i2c_addr, u8 override_set, u8 override_clear)
{
	struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
	if (!isl6405)
		return NULL;

	/* default configuration */
	if (override_set & 0x80)
		isl6405->config = ISL6405_ISEL2;
	else
		isl6405->config = ISL6405_ISEL1;
	isl6405->i2c = i2c;
	isl6405->i2c_addr = i2c_addr;
	fe->sec_priv = isl6405;

	/* bits which should be forced to '1' */
	isl6405->override_or = override_set;

	/* bits which should be forced to '0' */
	isl6405->override_and = ~override_clear;

	/* detect if it is present or not */
	if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
		kfree(isl6405);
		fe->sec_priv = NULL;
		return NULL;
	}

	/* install release callback */
	fe->ops.release_sec = isl6405_release;

	/* override frontend ops */
	fe->ops.set_voltage = isl6405_set_voltage;
	fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;

	return fe;
}
EXPORT_SYMBOL(isl6405_attach);

MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
MODULE_LICENSE("GPL");
Commit	Line	Data
4b1431ca HH	1	/*
	2	* isl6405.c - driver for dual lnb supply and control ic ISL6405
	3	*
	4	* Copyright (C) 2008 Hartmut Hackmann
	5	* Copyright (C) 2006 Oliver Endriss
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* as published by the Free Software Foundation; either version 2
	10	* of the License, or (at your option) any later version.
	11	*
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
bcb63314 SA	18	* To obtain the license, point your browser to
bcb63314 SA	19	* http://www.gnu.org/copyleft/gpl.html
4b1431ca HH	20	*
4b1431ca HH	21	*
991ce92f	22	* the project's page is at https://linuxtv.org
4b1431ca HH	23	*/
	24	#include <linux/delay.h>
	25	#include <linux/errno.h>
	26	#include <linux/init.h>
	27	#include <linux/kernel.h>
	28	#include <linux/module.h>
	29	#include <linux/string.h>
	30	#include <linux/slab.h>
	31
fada1935	32	#include <media/dvb_frontend.h>
4b1431ca HH	33	#include "isl6405.h"
	34
	35	struct isl6405 {
	36	u8 config;
	37	u8 override_or;
	38	u8 override_and;
	39	struct i2c_adapter *i2c;
	40	u8 i2c_addr;
	41	};
	42
0df289a2 MCC	43	static int isl6405_set_voltage(struct dvb_frontend *fe,
0df289a2 MCC	44	enum fe_sec_voltage voltage)
4b1431ca HH	45	{
	46	struct isl6405 isl6405 = (struct isl6405 ) fe->sec_priv;
	47	struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
	48	.buf = &isl6405->config,
	49	.len = sizeof(isl6405->config) };
	50
	51	if (isl6405->override_or & 0x80) {
	52	isl6405->config &= ~(ISL6405_VSEL2 \| ISL6405_EN2);
	53	switch (voltage) {
	54	case SEC_VOLTAGE_OFF:
	55	break;
	56	case SEC_VOLTAGE_13:
	57	isl6405->config \|= ISL6405_EN2;
	58	break;
	59	case SEC_VOLTAGE_18:
	60	isl6405->config \|= (ISL6405_EN2 \| ISL6405_VSEL2);
	61	break;
	62	default:
	63	return -EINVAL;
	64	}
	65	} else {
	66	isl6405->config &= ~(ISL6405_VSEL1 \| ISL6405_EN1);
	67	switch (voltage) {
	68	case SEC_VOLTAGE_OFF:
	69	break;
	70	case SEC_VOLTAGE_13:
	71	isl6405->config \|= ISL6405_EN1;
	72	break;
	73	case SEC_VOLTAGE_18:
	74	isl6405->config \|= (ISL6405_EN1 \| ISL6405_VSEL1);
	75	break;
	76	default:
	77	return -EINVAL;
c2c1b415	78	}
4b1431ca HH	79	}
	80	isl6405->config \|= isl6405->override_or;
	81	isl6405->config &= isl6405->override_and;
	82
	83	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
	84	}
	85
	86	static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
	87	{
	88	struct isl6405 isl6405 = (struct isl6405 ) fe->sec_priv;
	89	struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
	90	.buf = &isl6405->config,
	91	.len = sizeof(isl6405->config) };
	92
	93	if (isl6405->override_or & 0x80) {
	94	if (arg)
	95	isl6405->config \|= ISL6405_LLC2;
	96	else
	97	isl6405->config &= ~ISL6405_LLC2;
	98	} else {
	99	if (arg)
	100	isl6405->config \|= ISL6405_LLC1;
	101	else
	102	isl6405->config &= ~ISL6405_LLC1;
	103	}
	104	isl6405->config \|= isl6405->override_or;
	105	isl6405->config &= isl6405->override_and;
	106
	107	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
	108	}
	109
	110	static void isl6405_release(struct dvb_frontend *fe)
	111	{
	112	/* power off */
	113	isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
	114
	115	/* free */
	116	kfree(fe->sec_priv);
	117	fe->sec_priv = NULL;
	118	}
	119
	120	struct dvb_frontend isl6405_attach(struct dvb_frontend fe, struct i2c_adapter *i2c,
	121	u8 i2c_addr, u8 override_set, u8 override_clear)
	122	{
	123	struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
	124	if (!isl6405)
	125	return NULL;
	126
	127	/* default configuration */
	128	if (override_set & 0x80)
	129	isl6405->config = ISL6405_ISEL2;
	130	else
	131	isl6405->config = ISL6405_ISEL1;
	132	isl6405->i2c = i2c;
	133	isl6405->i2c_addr = i2c_addr;
	134	fe->sec_priv = isl6405;
	135
	136	/* bits which should be forced to '1' */
	137	isl6405->override_or = override_set;
	138
	139	/* bits which should be forced to '0' */
	140	isl6405->override_and = ~override_clear;
	141
	142	/* detect if it is present or not */
143	if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
144	kfree(isl6405);
145	fe->sec_priv = NULL;
146	return NULL;
147	}
148
149	/* install release callback */
150	fe->ops.release_sec = isl6405_release;
151
152	/* override frontend ops */
153	fe->ops.set_voltage = isl6405_set_voltage;
154	fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
155
156	return fe;
157	}
158	EXPORT_SYMBOL(isl6405_attach);
159
160	MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
161	MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
162	MODULE_LICENSE("GPL");