2 * isl6405.c - driver for dual lnb supply and control ic ISL6405
4 * Copyright (C) 2008 Hartmut Hackmann
5 * Copyright (C) 2006 Oliver Endriss
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.
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.
18 * To obtain the license, point your browser to
19 * http://www.gnu.org/copyleft/gpl.html
22 * the project's page is at https://linuxtv.org
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>
32 #include "dvb_frontend.h"
39 struct i2c_adapter *i2c;
43 static int isl6405_set_voltage(struct dvb_frontend *fe,
44 enum fe_sec_voltage voltage)
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) };
51 if (isl6405->override_or & 0x80) {
52 isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
57 isl6405->config |= ISL6405_EN2;
60 isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
66 isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
71 isl6405->config |= ISL6405_EN1;
74 isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
80 isl6405->config |= isl6405->override_or;
81 isl6405->config &= isl6405->override_and;
83 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
86 static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
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) };
93 if (isl6405->override_or & 0x80) {
95 isl6405->config |= ISL6405_LLC2;
97 isl6405->config &= ~ISL6405_LLC2;
100 isl6405->config |= ISL6405_LLC1;
102 isl6405->config &= ~ISL6405_LLC1;
104 isl6405->config |= isl6405->override_or;
105 isl6405->config &= isl6405->override_and;
107 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
110 static void isl6405_release(struct dvb_frontend *fe)
113 isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
120 struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
121 u8 i2c_addr, u8 override_set, u8 override_clear)
123 struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
127 /* default configuration */
128 if (override_set & 0x80)
129 isl6405->config = ISL6405_ISEL2;
131 isl6405->config = ISL6405_ISEL1;
133 isl6405->i2c_addr = i2c_addr;
134 fe->sec_priv = isl6405;
136 /* bits which should be forced to '1' */
137 isl6405->override_or = override_set;
139 /* bits which should be forced to '0' */
140 isl6405->override_and = ~override_clear;
142 /* detect if it is present or not */
143 if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
149 /* install release callback */
150 fe->ops.release_sec = isl6405_release;
152 /* override frontend ops */
153 fe->ops.set_voltage = isl6405_set_voltage;
154 fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
158 EXPORT_SYMBOL(isl6405_attach);
160 MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
161 MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
162 MODULE_LICENSE("GPL");