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Hartmut Hackmann4b1431c2008-04-22 14:42:09 -03001/*
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 *
Mauro Carvalho Chehab991ce922015-12-04 10:38:59 -020025 * the project's page is at https://linuxtv.org
Hartmut Hackmann4b1431c2008-04-22 14:42:09 -030026 */
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
38struct isl6405 {
39 u8 config;
40 u8 override_or;
41 u8 override_and;
42 struct i2c_adapter *i2c;
43 u8 i2c_addr;
44};
45
Mauro Carvalho Chehab0df289a2015-06-07 14:53:52 -030046static int isl6405_set_voltage(struct dvb_frontend *fe,
47 enum fe_sec_voltage voltage)
Hartmut Hackmann4b1431c2008-04-22 14:42:09 -030048{
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) };
53
54 if (isl6405->override_or & 0x80) {
55 isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2);
56 switch (voltage) {
57 case SEC_VOLTAGE_OFF:
58 break;
59 case SEC_VOLTAGE_13:
60 isl6405->config |= ISL6405_EN2;
61 break;
62 case SEC_VOLTAGE_18:
63 isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2);
64 break;
65 default:
66 return -EINVAL;
67 }
68 } else {
69 isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1);
70 switch (voltage) {
71 case SEC_VOLTAGE_OFF:
72 break;
73 case SEC_VOLTAGE_13:
74 isl6405->config |= ISL6405_EN1;
75 break;
76 case SEC_VOLTAGE_18:
77 isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1);
78 break;
79 default:
80 return -EINVAL;
Peter Senna Tschudinc2c1b412012-09-28 05:37:22 -030081 }
Hartmut Hackmann4b1431c2008-04-22 14:42:09 -030082 }
83 isl6405->config |= isl6405->override_or;
84 isl6405->config &= isl6405->override_and;
85
86 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
87}
88
89static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
90{
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) };
95
96 if (isl6405->override_or & 0x80) {
97 if (arg)
98 isl6405->config |= ISL6405_LLC2;
99 else
100 isl6405->config &= ~ISL6405_LLC2;
101 } else {
102 if (arg)
103 isl6405->config |= ISL6405_LLC1;
104 else
105 isl6405->config &= ~ISL6405_LLC1;
106 }
107 isl6405->config |= isl6405->override_or;
108 isl6405->config &= isl6405->override_and;
109
110 return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO;
111}
112
113static void isl6405_release(struct dvb_frontend *fe)
114{
115 /* power off */
116 isl6405_set_voltage(fe, SEC_VOLTAGE_OFF);
117
118 /* free */
119 kfree(fe->sec_priv);
120 fe->sec_priv = NULL;
121}
122
123struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c,
124 u8 i2c_addr, u8 override_set, u8 override_clear)
125{
126 struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL);
127 if (!isl6405)
128 return NULL;
129
130 /* default configuration */
131 if (override_set & 0x80)
132 isl6405->config = ISL6405_ISEL2;
133 else
134 isl6405->config = ISL6405_ISEL1;
135 isl6405->i2c = i2c;
136 isl6405->i2c_addr = i2c_addr;
137 fe->sec_priv = isl6405;
138
139 /* bits which should be forced to '1' */
140 isl6405->override_or = override_set;
141
142 /* bits which should be forced to '0' */
143 isl6405->override_and = ~override_clear;
144
145 /* detect if it is present or not */
146 if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) {
147 kfree(isl6405);
148 fe->sec_priv = NULL;
149 return NULL;
150 }
151
152 /* install release callback */
153 fe->ops.release_sec = isl6405_release;
154
155 /* override frontend ops */
156 fe->ops.set_voltage = isl6405_set_voltage;
157 fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage;
158
159 return fe;
160}
161EXPORT_SYMBOL(isl6405_attach);
162
163MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405");
164MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss");
165MODULE_LICENSE("GPL");