2 * isl6421.h - driver for lnb supply and control ic ISL6421
4 * Copyright (C) 2006 Andrew de Quincey
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 isl6421_set_voltage(struct dvb_frontend *fe,
47 enum fe_sec_voltage voltage)
49 struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
50 struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
51 .buf = &isl6421->config,
52 .len = sizeof(isl6421->config) };
54 isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1);
60 isl6421->config |= ISL6421_EN1;
63 isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1);
69 isl6421->config |= isl6421->override_or;
70 isl6421->config &= isl6421->override_and;
72 return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
75 static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
77 struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
78 struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
79 .buf = &isl6421->config,
80 .len = sizeof(isl6421->config) };
83 isl6421->config |= ISL6421_LLC1;
85 isl6421->config &= ~ISL6421_LLC1;
87 isl6421->config |= isl6421->override_or;
88 isl6421->config &= isl6421->override_and;
90 return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
93 static int isl6421_set_tone(struct dvb_frontend *fe,
94 enum fe_sec_tone_mode tone)
96 struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv;
97 struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0,
98 .buf = &isl6421->config,
99 .len = sizeof(isl6421->config) };
103 isl6421->config |= ISL6421_ENT1;
106 isl6421->config &= ~ISL6421_ENT1;
112 isl6421->config |= isl6421->override_or;
113 isl6421->config &= isl6421->override_and;
115 return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO;
118 static void isl6421_release(struct dvb_frontend *fe)
121 isl6421_set_voltage(fe, SEC_VOLTAGE_OFF);
128 struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr,
129 u8 override_set, u8 override_clear, bool override_tone)
131 struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL);
135 /* default configuration */
136 isl6421->config = ISL6421_ISEL1;
138 isl6421->i2c_addr = i2c_addr;
139 fe->sec_priv = isl6421;
141 /* bits which should be forced to '1' */
142 isl6421->override_or = override_set;
144 /* bits which should be forced to '0' */
145 isl6421->override_and = ~override_clear;
147 /* detect if it is present or not */
148 if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) {
154 /* install release callback */
155 fe->ops.release_sec = isl6421_release;
157 /* override frontend ops */
158 fe->ops.set_voltage = isl6421_set_voltage;
159 fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage;
161 fe->ops.set_tone = isl6421_set_tone;
165 EXPORT_SYMBOL(isl6421_attach);
167 MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421");
168 MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss");
169 MODULE_LICENSE("GPL");