[mirror_ubuntu-hirsute-kernel.git] / drivers / media / dvb-frontends / isl6421.c

/*
 * 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.
 *
 * 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 "dvb_frontend.h"
#include "isl6421.h"

struct isl6421 {
	u8			config;
	u8			override_or;
	u8			override_and;
	struct i2c_adapter	*i2c;
	u8			i2c_addr;
};

static int isl6421_set_voltage(struct dvb_frontend *fe,
			       enum fe_sec_voltage voltage)
{
	struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_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->sec_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 int isl6421_set_tone(struct dvb_frontend *fe,
			    enum fe_sec_tone_mode tone)
{
	struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
	struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
			       .buf = &isl6421->config,
			       .len = sizeof(isl6421->config) };

	switch (tone) {
	case SEC_TONE_ON:
		isl6421->config |= ISL6421_ENT1;
		break;
	case SEC_TONE_OFF:
		isl6421->config &= ~ISL6421_ENT1;
		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 void isl6421_release(struct dvb_frontend *fe)
{
	/* power off */
	isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);

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

struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
		   u8 override_set, u8 override_clear, bool override_tone)
{
	struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
	if (!isl6421)
		return NULL;

	/* default configuration */
	isl6421->config = ISL6421_ISEL1;
	isl6421->i2c = i2c;
	isl6421->i2c_addr = i2c_addr;
	fe->sec_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->sec_priv = NULL;
		return NULL;
	}

	/* install release callback */
	fe->ops.release_sec = isl6421_release;

	/* override frontend ops */
	fe->ops.set_voltage = isl6421_set_voltage;
	fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
	if (override_tone)
		fe->ops.set_tone = isl6421_set_tone;

	return fe;
}
EXPORT_SYMBOL(isl6421_attach);

MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
MODULE_LICENSE("GPL");
Commit	Line	Data
21c28582 AQ	1	/*
	2	* isl6421.h - driver for lnb supply and control ic ISL6421
	3	*
	4	* Copyright (C) 2006 Andrew de Quincey
	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
21c28582 AQ	20	*
21c28582 AQ	21	*
991ce92f	22	* the project's page is at https://linuxtv.org
21c28582 AQ	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>
21c28582 AQ	29	#include <linux/string.h>
	30	#include <linux/slab.h>
	31
	32	#include "dvb_frontend.h"
	33	#include "isl6421.h"
	34
	35	struct isl6421 {
	36	u8 config;
	37	u8 override_or;
	38	u8 override_and;
	39	struct i2c_adapter *i2c;
	40	u8 i2c_addr;
21c28582 AQ	41	};
21c28582 AQ	42
0df289a2 MCC	43	static int isl6421_set_voltage(struct dvb_frontend *fe,
0df289a2 MCC	44	enum fe_sec_voltage voltage)
21c28582	45	{
13fef933	46	struct isl6421 isl6421 = (struct isl6421 ) fe->sec_priv;
21c28582 AQ	47	struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
	48	.buf = &isl6421->config,
	49	.len = sizeof(isl6421->config) };
	50
	51	isl6421->config &= ~(ISL6421_VSEL1 \| ISL6421_EN1);
	52
	53	switch(voltage) {
	54	case SEC_VOLTAGE_OFF:
	55	break;
	56	case SEC_VOLTAGE_13:
	57	isl6421->config \|= ISL6421_EN1;
	58	break;
	59	case SEC_VOLTAGE_18:
	60	isl6421->config \|= (ISL6421_EN1 \| ISL6421_VSEL1);
	61	break;
	62	default:
	63	return -EINVAL;
c2c1b415	64	}
21c28582 AQ	65
	66	isl6421->config \|= isl6421->override_or;
	67	isl6421->config &= isl6421->override_and;
	68
	69	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
	70	}
	71
	72	static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
	73	{
13fef933	74	struct isl6421 isl6421 = (struct isl6421 ) fe->sec_priv;
21c28582 AQ	75	struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
	76	.buf = &isl6421->config,
	77	.len = sizeof(isl6421->config) };
	78
	79	if (arg)
	80	isl6421->config \|= ISL6421_LLC1;
	81	else
	82	isl6421->config &= ~ISL6421_LLC1;
	83
	84	isl6421->config \|= isl6421->override_or;
	85	isl6421->config &= isl6421->override_and;
	86
	87	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
	88	}
	89
0df289a2 MCC	90	static int isl6421_set_tone(struct dvb_frontend *fe,
0df289a2 MCC	91	enum fe_sec_tone_mode tone)
48a8a03b MCC	92	{
	93	struct isl6421 isl6421 = (struct isl6421 ) fe->sec_priv;
	94	struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
	95	.buf = &isl6421->config,
	96	.len = sizeof(isl6421->config) };
	97
	98	switch (tone) {
	99	case SEC_TONE_ON:
	100	isl6421->config \|= ISL6421_ENT1;
	101	break;
	102	case SEC_TONE_OFF:
	103	isl6421->config &= ~ISL6421_ENT1;
	104	break;
	105	default:
	106	return -EINVAL;
	107	}
	108
	109	isl6421->config \|= isl6421->override_or;
	110	isl6421->config &= isl6421->override_and;
	111
	112	return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
	113	}
	114
21c28582 AQ	115	static void isl6421_release(struct dvb_frontend *fe)
21c28582 AQ	116	{
21c28582 AQ	117	/* power off */
	118	isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
	119
13fef933 AQ	120	/* free */
	121	kfree(fe->sec_priv);
	122	fe->sec_priv = NULL;
21c28582 AQ	123	}
21c28582 AQ	124
13fef933	125	struct dvb_frontend isl6421_attach(struct dvb_frontend fe, struct i2c_adapter *i2c, u8 i2c_addr,
48a8a03b	126	u8 override_set, u8 override_clear, bool override_tone)
21c28582 AQ	127	{
	128	struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
	129	if (!isl6421)
13fef933	130	return NULL;
21c28582 AQ	131
	132	/* default configuration */
	133	isl6421->config = ISL6421_ISEL1;
	134	isl6421->i2c = i2c;
	135	isl6421->i2c_addr = i2c_addr;
13fef933	136	fe->sec_priv = isl6421;
21c28582 AQ	137
	138	/* bits which should be forced to '1' */
	139	isl6421->override_or = override_set;
	140
	141	/* bits which should be forced to '0' */
	142	isl6421->override_and = ~override_clear;
	143
	144	/* detect if it is present or not */
	145	if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {
	146	kfree(isl6421);
09d48954	147	fe->sec_priv = NULL;
13fef933	148	return NULL;
21c28582 AQ	149	}
	150
	151	/* install release callback */
62a7b3e2	152	fe->ops.release_sec = isl6421_release;
21c28582 AQ	153
21c28582 AQ	154	/* override frontend ops */
dea74869 PB	155	fe->ops.set_voltage = isl6421_set_voltage;
dea74869 PB	156	fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
48a8a03b MCC	157	if (override_tone)
48a8a03b MCC	158	fe->ops.set_tone = isl6421_set_tone;
21c28582	159
13fef933	160	return fe;
21c28582 AQ	161	}
	162	EXPORT_SYMBOL(isl6421_attach);
	163
	164	MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
	165	MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
	166	MODULE_LICENSE("GPL");