[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb-frontends / lnbp22.c

/*
 * lnbp22.h - driver for lnb supply and control ic lnbp22
 *
 * Copyright (C) 2006 Dominik Kuhlen
 * Based on lnbp21 driver
 *
 * 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/moduleparam.h>
#include <linux/string.h>
#include <linux/slab.h>

#include "dvb_frontend.h"
#include "lnbp22.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");


#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)

struct lnbp22 {
	u8		    config[4];
	struct i2c_adapter *i2c;
};

static int lnbp22_set_voltage(struct dvb_frontend *fe,
			      enum fe_sec_voltage voltage)
{
	struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
	struct i2c_msg msg = {
		.addr = 0x08,
		.flags = 0,
		.buf = (char *)&lnbp22->config,
		.len = sizeof(lnbp22->config),
	};

	dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
	       SEC_VOLTAGE_18, SEC_VOLTAGE_13);

	lnbp22->config[3] = 0x60; /* Power down */
	switch (voltage) {
	case SEC_VOLTAGE_OFF:
		break;
	case SEC_VOLTAGE_13:
		lnbp22->config[3] |= LNBP22_EN;
		break;
	case SEC_VOLTAGE_18:
		lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
		break;
	default:
		return -EINVAL;
	}

	dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
	return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
}

static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
{
	struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
	struct i2c_msg msg = {
		.addr = 0x08,
		.flags = 0,
		.buf = (char *)&lnbp22->config,
		.len = sizeof(lnbp22->config),
	};

	dprintk(1, "%s: %d\n", __func__, (int)arg);
	if (arg)
		lnbp22->config[3] |= LNBP22_LLC;
	else
		lnbp22->config[3] &= ~LNBP22_LLC;

	return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
}

static void lnbp22_release(struct dvb_frontend *fe)
{
	dprintk(1, "%s\n", __func__);
	/* LNBP power off */
	lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);

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

struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
					struct i2c_adapter *i2c)
{
	struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
	if (!lnbp22)
		return NULL;

	/* default configuration */
	lnbp22->config[0] = 0x00; /* ? */
	lnbp22->config[1] = 0x28; /* ? */
	lnbp22->config[2] = 0x48; /* ? */
	lnbp22->config[3] = 0x60; /* Power down */
	lnbp22->i2c = i2c;
	fe->sec_priv = lnbp22;

	/* detect if it is present or not */
	if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
		dprintk(0, "%s LNBP22 not found\n", __func__);
		kfree(lnbp22);
		fe->sec_priv = NULL;
		return NULL;
	}

	/* install release callback */
	fe->ops.release_sec = lnbp22_release;

	/* override frontend ops */
	fe->ops.set_voltage = lnbp22_set_voltage;
	fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;

	return fe;
}
EXPORT_SYMBOL(lnbp22_attach);

MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
MODULE_AUTHOR("Dominik Kuhlen");
MODULE_LICENSE("GPL");
Commit	Line	Data
4e2c53fd IL	1	/*
	2	* lnbp22.h - driver for lnb supply and control ic lnbp22
	3	*
	4	* Copyright (C) 2006 Dominik Kuhlen
	5	* Based on lnbp21 driver
	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
4e2c53fd IL	20	*
4e2c53fd IL	21	*
991ce92f	22	* the project's page is at https://linuxtv.org
4e2c53fd IL	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/moduleparam.h>
	30	#include <linux/string.h>
	31	#include <linux/slab.h>
	32
	33	#include "dvb_frontend.h"
	34	#include "lnbp22.h"
	35
	36	static int debug;
	37	module_param(debug, int, 0644);
	38	MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
	39
	40
	41	#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
	42
	43	struct lnbp22 {
	44	u8 config[4];
	45	struct i2c_adapter *i2c;
	46	};
	47
0df289a2 MCC	48	static int lnbp22_set_voltage(struct dvb_frontend *fe,
0df289a2 MCC	49	enum fe_sec_voltage voltage)
4e2c53fd IL	50	{
	51	struct lnbp22 lnbp22 = (struct lnbp22 )fe->sec_priv;
	52	struct i2c_msg msg = {
	53	.addr = 0x08,
	54	.flags = 0,
	55	.buf = (char *)&lnbp22->config,
	56	.len = sizeof(lnbp22->config),
	57	};
	58
	59	dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
	60	SEC_VOLTAGE_18, SEC_VOLTAGE_13);
	61
	62	lnbp22->config[3] = 0x60; /* Power down */
	63	switch (voltage) {
	64	case SEC_VOLTAGE_OFF:
	65	break;
	66	case SEC_VOLTAGE_13:
	67	lnbp22->config[3] \|= LNBP22_EN;
	68	break;
	69	case SEC_VOLTAGE_18:
	70	lnbp22->config[3] \|= (LNBP22_EN \| LNBP22_VSEL);
	71	break;
	72	default:
	73	return -EINVAL;
c2c1b415	74	}
4e2c53fd IL	75
	76	dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
	77	return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
	78	}
	79
	80	static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
	81	{
	82	struct lnbp22 lnbp22 = (struct lnbp22 ) fe->sec_priv;
	83	struct i2c_msg msg = {
	84	.addr = 0x08,
	85	.flags = 0,
	86	.buf = (char *)&lnbp22->config,
	87	.len = sizeof(lnbp22->config),
	88	};
	89
	90	dprintk(1, "%s: %d\n", __func__, (int)arg);
	91	if (arg)
	92	lnbp22->config[3] \|= LNBP22_LLC;
	93	else
	94	lnbp22->config[3] &= ~LNBP22_LLC;
	95
	96	return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
	97	}
	98
	99	static void lnbp22_release(struct dvb_frontend *fe)
	100	{
	101	dprintk(1, "%s\n", __func__);
	102	/* LNBP power off */
	103	lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
	104
	105	/* free data */
	106	kfree(fe->sec_priv);
	107	fe->sec_priv = NULL;
	108	}
	109
	110	struct dvb_frontend lnbp22_attach(struct dvb_frontend fe,
	111	struct i2c_adapter *i2c)
	112	{
	113	struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
	114	if (!lnbp22)
	115	return NULL;
	116
	117	/* default configuration */
	118	lnbp22->config[0] = 0x00; /* ? */
	119	lnbp22->config[1] = 0x28; /* ? */
	120	lnbp22->config[2] = 0x48; /* ? */
	121	lnbp22->config[3] = 0x60; /* Power down */
	122	lnbp22->i2c = i2c;
	123	fe->sec_priv = lnbp22;
	124
	125	/* detect if it is present or not */
	126	if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
	127	dprintk(0, "%s LNBP22 not found\n", __func__);
	128	kfree(lnbp22);
	129	fe->sec_priv = NULL;
	130	return NULL;
	131	}
	132
	133	/* install release callback */
	134	fe->ops.release_sec = lnbp22_release;
	135
	136	/* override frontend ops */
	137	fe->ops.set_voltage = lnbp22_set_voltage;
	138	fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
139
140	return fe;
141	}
142	EXPORT_SYMBOL(lnbp22_attach);
143
144	MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
145	MODULE_AUTHOR("Dominik Kuhlen");
146	MODULE_LICENSE("GPL");