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.
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
25 * the project's page is at https://linuxtv.org
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>
35 #include "dvb_frontend.h"
42 struct i2c_adapter *i2c;
46 static int isl6405_set_voltage(struct dvb_frontend *fe,
47 enum fe_sec_voltage voltage)
49 struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
50 struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
51 .buf = &isl6405->config,
52 .len = sizeof(isl6405->config) };
54 if (isl6405->override_or & 0x80) {
55 isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
60 isl6405->config |= ISL6405_EN2;
63 isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
69 isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
74 isl6405->config |= ISL6405_EN1;
77 isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
83 isl6405->config |= isl6405->override_or;
84 isl6405->config &= isl6405->override_and;
86 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
89 static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
91 struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv;
92 struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0,
93 .buf = &isl6405->config,
94 .len = sizeof(isl6405->config) };
96 if (isl6405->override_or & 0x80) {
98 isl6405->config |= ISL6405_LLC2;
100 isl6405->config &= ~ISL6405_LLC2;
103 isl6405->config |= ISL6405_LLC1;
105 isl6405->config &= ~ISL6405_LLC1;
107 isl6405->config |= isl6405->override_or;
108 isl6405->config &= isl6405->override_and;
110 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
113 static void isl6405_release(struct dvb_frontend *fe)
116 isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
123 struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
124 u8 i2c_addr, u8 override_set, u8 override_clear)
126 struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
130 /* default configuration */
131 if (override_set & 0x80)
132 isl6405->config = ISL6405_ISEL2;
134 isl6405->config = ISL6405_ISEL1;
136 isl6405->i2c_addr = i2c_addr;
137 fe->sec_priv = isl6405;
139 /* bits which should be forced to '1' */
140 isl6405->override_or = override_set;
142 /* bits which should be forced to '0' */
143 isl6405->override_and = ~override_clear;
145 /* detect if it is present or not */
146 if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
152 /* install release callback */
153 fe->ops.release_sec = isl6405_release;
155 /* override frontend ops */
156 fe->ops.set_voltage = isl6405_set_voltage;
157 fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
161 EXPORT_SYMBOL(isl6405_attach);
163 MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
164 MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
165 MODULE_LICENSE("GPL");