[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.
 *
 *
 * 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/string.h>
#include <linux/slab.h>

#include "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, fe_sec_voltage_t 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	*
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	22	* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
	23	*
	24	*
	25	* the project's page is at http://www.linuxtv.org
	26	*/
	27	#include <linux/delay.h>
	28	#include <linux/errno.h>
	29	#include <linux/init.h>
	30	#include <linux/kernel.h>
	31	#include <linux/module.h>
	32	#include <linux/string.h>
	33	#include <linux/slab.h>
	34
	35	#include "dvb_frontend.h"
	36	#include "isl6405.h"
	37
	38	struct isl6405 {
	39	u8 config;
	40	u8 override_or;
	41	u8 override_and;
	42	struct i2c_adapter *i2c;
	43	u8 i2c_addr;
	44	};
	45
	46	static int isl6405_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
	47	{
	48	struct isl6405 isl6405 = (struct isl6405 ) fe->sec_priv;
	49	struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
	50	.buf = &isl6405->config,
	51	.len = sizeof(isl6405->config) };
	52
	53	if (isl6405->override_or & 0x80) {
	54	isl6405->config &= ~(ISL6405_VSEL2 \| ISL6405_EN2);
	55	switch (voltage) {
	56	case SEC_VOLTAGE_OFF:
	57	break;
	58	case SEC_VOLTAGE_13:
	59	isl6405->config \|= ISL6405_EN2;
	60	break;
	61	case SEC_VOLTAGE_18:
	62	isl6405->config \|= (ISL6405_EN2 \| ISL6405_VSEL2);
	63	break;
	64	default:
65	return -EINVAL;
66	}
67	} else {
68	isl6405->config &= ~(ISL6405_VSEL1 \| ISL6405_EN1);
69	switch (voltage) {
70	case SEC_VOLTAGE_OFF:
71	break;
72	case SEC_VOLTAGE_13:
73	isl6405->config \|= ISL6405_EN1;
74	break;
75	case SEC_VOLTAGE_18:
76	isl6405->config \|= (ISL6405_EN1 \| ISL6405_VSEL1);
77	break;
78	default:
79	return -EINVAL;
80	};
81	}
82	isl6405->config \|= isl6405->override_or;
83	isl6405->config &= isl6405->override_and;
84
85	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
86	}
87
88	static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
89	{
90	struct isl6405 isl6405 = (struct isl6405 ) fe->sec_priv;
91	struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
92	.buf = &isl6405->config,
93	.len = sizeof(isl6405->config) };
94
95	if (isl6405->override_or & 0x80) {
96	if (arg)
97	isl6405->config \|= ISL6405_LLC2;
98	else
99	isl6405->config &= ~ISL6405_LLC2;
100	} else {
101	if (arg)
102	isl6405->config \|= ISL6405_LLC1;
103	else
104	isl6405->config &= ~ISL6405_LLC1;
105	}
106	isl6405->config \|= isl6405->override_or;
107	isl6405->config &= isl6405->override_and;
108
109	return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
110	}
111
112	static void isl6405_release(struct dvb_frontend *fe)
113	{
114	/* power off */
115	isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
116
117	/* free */
118	kfree(fe->sec_priv);
119	fe->sec_priv = NULL;
120	}
121
122	struct dvb_frontend isl6405_attach(struct dvb_frontend fe, struct i2c_adapter *i2c,
123	u8 i2c_addr, u8 override_set, u8 override_clear)
124	{
125	struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
126	if (!isl6405)
127	return NULL;
128
129	/* default configuration */
130	if (override_set & 0x80)
131	isl6405->config = ISL6405_ISEL2;
132	else
133	isl6405->config = ISL6405_ISEL1;
134	isl6405->i2c = i2c;
135	isl6405->i2c_addr = i2c_addr;
136	fe->sec_priv = isl6405;
137
138	/* bits which should be forced to '1' */
139	isl6405->override_or = override_set;
140
141	/* bits which should be forced to '0' */
142	isl6405->override_and = ~override_clear;
143
144	/* detect if it is present or not */
145	if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
146	kfree(isl6405);
147	fe->sec_priv = NULL;
148	return NULL;
149	}
150
151	/* install release callback */
152	fe->ops.release_sec = isl6405_release;
153
154	/* override frontend ops */
155	fe->ops.set_voltage = isl6405_set_voltage;
156	fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
157
158	return fe;
159	}
160	EXPORT_SYMBOL(isl6405_attach);
161
162	MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
163	MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
164	MODULE_LICENSE("GPL");