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4e2c53fd IL |
1 | /* |
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 | * | |
991ce92f | 25 | * the project's page is at https://linuxtv.org |
4e2c53fd IL |
26 | */ |
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 | ||
39 | static int debug; | |
40 | module_param(debug, int, 0644); | |
41 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); | |
42 | ||
43 | ||
44 | #define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg) | |
45 | ||
46 | struct lnbp22 { | |
47 | u8 config[4]; | |
48 | struct i2c_adapter *i2c; | |
49 | }; | |
50 | ||
0df289a2 MCC |
51 | static int lnbp22_set_voltage(struct dvb_frontend *fe, |
52 | enum fe_sec_voltage voltage) | |
4e2c53fd IL |
53 | { |
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; | |
c2c1b415 | 77 | } |
4e2c53fd IL |
78 | |
79 | dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]); | |
80 | return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
81 | } | |
82 | ||
83 | static 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 | ||
102 | static 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 | ||
113 | struct 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 | } | |
145 | EXPORT_SYMBOL(lnbp22_attach); | |
146 | ||
147 | MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22"); | |
148 | MODULE_AUTHOR("Dominik Kuhlen"); | |
149 | MODULE_LICENSE("GPL"); |