blob: 5c5fd04fd4a73dfacc3fb867eb32ee0f6a669bdd [file] [log] [blame]
Igor M. Liplianin4e2c53f2011-09-23 18:33:50 -03001/*
2 * lnbp22.h - driver for lnb supply and control ic lnbp22
3 *
4 * Copyright (C) 2006 Dominik Kuhlen
5 * Based on lnbp21 driver
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
Igor M. Liplianin4e2c53f2011-09-23 18:33:50 -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/moduleparam.h>
33#include <linux/string.h>
34#include <linux/slab.h>
35
36#include "dvb_frontend.h"
37#include "lnbp22.h"
38
39static int debug;
40module_param(debug, int, 0644);
41MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
42
43
44#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg)
45
46struct lnbp22 {
47 u8 config[4];
48 struct i2c_adapter *i2c;
49};
50
Mauro Carvalho Chehab0df289a2015-06-07 14:53:52 -030051static int lnbp22_set_voltage(struct dvb_frontend *fe,
52 enum fe_sec_voltage voltage)
Igor M. Liplianin4e2c53f2011-09-23 18:33:50 -030053{
54 struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv;
55 struct i2c_msg msg = {
56 .addr = 0x08,
57 .flags = 0,
58 .buf = (char *)&lnbp22->config,
59 .len = sizeof(lnbp22->config),
60 };
61
62 dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage,
63 SEC_VOLTAGE_18, SEC_VOLTAGE_13);
64
65 lnbp22->config[3] = 0x60; /* Power down */
66 switch (voltage) {
67 case SEC_VOLTAGE_OFF:
68 break;
69 case SEC_VOLTAGE_13:
70 lnbp22->config[3] |= LNBP22_EN;
71 break;
72 case SEC_VOLTAGE_18:
73 lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL);
74 break;
75 default:
76 return -EINVAL;
Peter Senna Tschudinc2c1b412012-09-28 05:37:22 -030077 }
Igor M. Liplianin4e2c53f2011-09-23 18:33:50 -030078
79 dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]);
80 return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
81}
82
83static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
84{
85 struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv;
86 struct i2c_msg msg = {
87 .addr = 0x08,
88 .flags = 0,
89 .buf = (char *)&lnbp22->config,
90 .len = sizeof(lnbp22->config),
91 };
92
93 dprintk(1, "%s: %d\n", __func__, (int)arg);
94 if (arg)
95 lnbp22->config[3] |= LNBP22_LLC;
96 else
97 lnbp22->config[3] &= ~LNBP22_LLC;
98
99 return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO;
100}
101
102static void lnbp22_release(struct dvb_frontend *fe)
103{
104 dprintk(1, "%s\n", __func__);
105 /* LNBP power off */
106 lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF);
107
108 /* free data */
109 kfree(fe->sec_priv);
110 fe->sec_priv = NULL;
111}
112
113struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe,
114 struct i2c_adapter *i2c)
115{
116 struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL);
117 if (!lnbp22)
118 return NULL;
119
120 /* default configuration */
121 lnbp22->config[0] = 0x00; /* ? */
122 lnbp22->config[1] = 0x28; /* ? */
123 lnbp22->config[2] = 0x48; /* ? */
124 lnbp22->config[3] = 0x60; /* Power down */
125 lnbp22->i2c = i2c;
126 fe->sec_priv = lnbp22;
127
128 /* detect if it is present or not */
129 if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) {
130 dprintk(0, "%s LNBP22 not found\n", __func__);
131 kfree(lnbp22);
132 fe->sec_priv = NULL;
133 return NULL;
134 }
135
136 /* install release callback */
137 fe->ops.release_sec = lnbp22_release;
138
139 /* override frontend ops */
140 fe->ops.set_voltage = lnbp22_set_voltage;
141 fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage;
142
143 return fe;
144}
145EXPORT_SYMBOL(lnbp22_attach);
146
147MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22");
148MODULE_AUTHOR("Dominik Kuhlen");
149MODULE_LICENSE("GPL");