1 /*
2 * lnbp21.c - driver for lnb supply and control ic lnbp21
3 *
4 * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de>
5 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
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 * To obtain the license, point your browser to
19 * http://www.gnu.org/copyleft/gpl.html
20 *
21 *
22 * the project's page is at https://linuxtv.org
23 */
24 #include <linux/delay.h>
25 #include <linux/errno.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/string.h>
30 #include <linux/slab.h>
31
32 #include <media/dvb_frontend.h>
33 #include "lnbp21.h"
34 #include "lnbh24.h"
35
36 struct lnbp21 {
37 u8 config;
38 u8 override_or;
39 u8 override_and;
40 struct i2c_adapter *i2c;
41 u8 i2c_addr;
42 };
43
lnbp21_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)44 static int lnbp21_set_voltage(struct dvb_frontend *fe,
45 enum fe_sec_voltage voltage)
46 {
47 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
48 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
49 .buf = &lnbp21->config,
50 .len = sizeof(lnbp21->config) };
51
52 lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
53
54 switch(voltage) {
55 case SEC_VOLTAGE_OFF:
56 break;
57 case SEC_VOLTAGE_13:
58 lnbp21->config |= LNBP21_EN;
59 break;
60 case SEC_VOLTAGE_18:
61 lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
62 break;
63 default:
64 return -EINVAL;
65 }
66
67 lnbp21->config |= lnbp21->override_or;
68 lnbp21->config &= lnbp21->override_and;
69
70 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
71 }
72
lnbp21_enable_high_lnb_voltage(struct dvb_frontend * fe,long arg)73 static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
74 {
75 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
76 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
77 .buf = &lnbp21->config,
78 .len = sizeof(lnbp21->config) };
79
80 if (arg)
81 lnbp21->config |= LNBP21_LLC;
82 else
83 lnbp21->config &= ~LNBP21_LLC;
84
85 lnbp21->config |= lnbp21->override_or;
86 lnbp21->config &= lnbp21->override_and;
87
88 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
89 }
90
lnbp21_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)91 static int lnbp21_set_tone(struct dvb_frontend *fe,
92 enum fe_sec_tone_mode tone)
93 {
94 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
95 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
96 .buf = &lnbp21->config,
97 .len = sizeof(lnbp21->config) };
98
99 switch (tone) {
100 case SEC_TONE_OFF:
101 lnbp21->config &= ~LNBP21_TEN;
102 break;
103 case SEC_TONE_ON:
104 lnbp21->config |= LNBP21_TEN;
105 break;
106 default:
107 return -EINVAL;
108 }
109
110 lnbp21->config |= lnbp21->override_or;
111 lnbp21->config &= lnbp21->override_and;
112
113 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
114 }
115
lnbp21_release(struct dvb_frontend * fe)116 static void lnbp21_release(struct dvb_frontend *fe)
117 {
118 /* LNBP power off */
119 lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
120
121 /* free data */
122 kfree(fe->sec_priv);
123 fe->sec_priv = NULL;
124 }
125
lnbx2x_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear,u8 i2c_addr,u8 config)126 static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe,
127 struct i2c_adapter *i2c, u8 override_set,
128 u8 override_clear, u8 i2c_addr, u8 config)
129 {
130 struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
131 if (!lnbp21)
132 return NULL;
133
134 /* default configuration */
135 lnbp21->config = config;
136 lnbp21->i2c = i2c;
137 lnbp21->i2c_addr = i2c_addr;
138 fe->sec_priv = lnbp21;
139
140 /* bits which should be forced to '1' */
141 lnbp21->override_or = override_set;
142
143 /* bits which should be forced to '0' */
144 lnbp21->override_and = ~override_clear;
145
146 /* detect if it is present or not */
147 if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
148 kfree(lnbp21);
149 return NULL;
150 }
151
152 /* install release callback */
153 fe->ops.release_sec = lnbp21_release;
154
155 /* override frontend ops */
156 fe->ops.set_voltage = lnbp21_set_voltage;
157 fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
158 if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/
159 fe->ops.set_tone = lnbp21_set_tone;
160 printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr);
161
162 return fe;
163 }
164
lnbh24_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear,u8 i2c_addr)165 struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe,
166 struct i2c_adapter *i2c, u8 override_set,
167 u8 override_clear, u8 i2c_addr)
168 {
169 return lnbx2x_attach(fe, i2c, override_set, override_clear,
170 i2c_addr, LNBH24_TTX);
171 }
172 EXPORT_SYMBOL(lnbh24_attach);
173
lnbp21_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear)174 struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe,
175 struct i2c_adapter *i2c, u8 override_set,
176 u8 override_clear)
177 {
178 return lnbx2x_attach(fe, i2c, override_set, override_clear,
179 0x08, LNBP21_ISEL);
180 }
181 EXPORT_SYMBOL(lnbp21_attach);
182
183 MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24");
184 MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin");
185 MODULE_LICENSE("GPL");
186
