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21c28582 AQ |
1 | /* |
2 | * isl6421.h - driver for lnb supply and control ic ISL6421 | |
3 | * | |
4 | * Copyright (C) 2006 Andrew de Quincey | |
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 | * | |
991ce92f | 25 | * the project's page is at https://linuxtv.org |
21c28582 AQ |
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> | |
21c28582 AQ |
32 | #include <linux/string.h> |
33 | #include <linux/slab.h> | |
34 | ||
35 | #include "dvb_frontend.h" | |
36 | #include "isl6421.h" | |
37 | ||
38 | struct isl6421 { | |
39 | u8 config; | |
40 | u8 override_or; | |
41 | u8 override_and; | |
42 | struct i2c_adapter *i2c; | |
43 | u8 i2c_addr; | |
21c28582 AQ |
44 | }; |
45 | ||
0df289a2 MCC |
46 | static int isl6421_set_voltage(struct dvb_frontend *fe, |
47 | enum fe_sec_voltage voltage) | |
21c28582 | 48 | { |
13fef933 | 49 | struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv; |
21c28582 AQ |
50 | struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0, |
51 | .buf = &isl6421->config, | |
52 | .len = sizeof(isl6421->config) }; | |
53 | ||
54 | isl6421->config &= ~(ISL6421_VSEL1 | ISL6421_EN1); | |
55 | ||
56 | switch(voltage) { | |
57 | case SEC_VOLTAGE_OFF: | |
58 | break; | |
59 | case SEC_VOLTAGE_13: | |
60 | isl6421->config |= ISL6421_EN1; | |
61 | break; | |
62 | case SEC_VOLTAGE_18: | |
63 | isl6421->config |= (ISL6421_EN1 | ISL6421_VSEL1); | |
64 | break; | |
65 | default: | |
66 | return -EINVAL; | |
c2c1b415 | 67 | } |
21c28582 AQ |
68 | |
69 | isl6421->config |= isl6421->override_or; | |
70 | isl6421->config &= isl6421->override_and; | |
71 | ||
72 | return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
73 | } | |
74 | ||
75 | static int isl6421_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) | |
76 | { | |
13fef933 | 77 | struct isl6421 *isl6421 = (struct isl6421 *) fe->sec_priv; |
21c28582 AQ |
78 | struct i2c_msg msg = { .addr = isl6421->i2c_addr, .flags = 0, |
79 | .buf = &isl6421->config, | |
80 | .len = sizeof(isl6421->config) }; | |
81 | ||
82 | if (arg) | |
83 | isl6421->config |= ISL6421_LLC1; | |
84 | else | |
85 | isl6421->config &= ~ISL6421_LLC1; | |
86 | ||
87 | isl6421->config |= isl6421->override_or; | |
88 | isl6421->config &= isl6421->override_and; | |
89 | ||
90 | return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
91 | } | |
92 | ||
0df289a2 MCC |
93 | static int isl6421_set_tone(struct dvb_frontend *fe, |
94 | enum fe_sec_tone_mode tone) | |
48a8a03b MCC |
95 | { |
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) }; | |
100 | ||
101 | switch (tone) { | |
102 | case SEC_TONE_ON: | |
103 | isl6421->config |= ISL6421_ENT1; | |
104 | break; | |
105 | case SEC_TONE_OFF: | |
106 | isl6421->config &= ~ISL6421_ENT1; | |
107 | break; | |
108 | default: | |
109 | return -EINVAL; | |
110 | } | |
111 | ||
112 | isl6421->config |= isl6421->override_or; | |
113 | isl6421->config &= isl6421->override_and; | |
114 | ||
115 | return (i2c_transfer(isl6421->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
116 | } | |
117 | ||
21c28582 AQ |
118 | static void isl6421_release(struct dvb_frontend *fe) |
119 | { | |
21c28582 AQ |
120 | /* power off */ |
121 | isl6421_set_voltage(fe, SEC_VOLTAGE_OFF); | |
122 | ||
13fef933 AQ |
123 | /* free */ |
124 | kfree(fe->sec_priv); | |
125 | fe->sec_priv = NULL; | |
21c28582 AQ |
126 | } |
127 | ||
13fef933 | 128 | struct dvb_frontend *isl6421_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 i2c_addr, |
48a8a03b | 129 | u8 override_set, u8 override_clear, bool override_tone) |
21c28582 AQ |
130 | { |
131 | struct isl6421 *isl6421 = kmalloc(sizeof(struct isl6421), GFP_KERNEL); | |
132 | if (!isl6421) | |
13fef933 | 133 | return NULL; |
21c28582 AQ |
134 | |
135 | /* default configuration */ | |
136 | isl6421->config = ISL6421_ISEL1; | |
137 | isl6421->i2c = i2c; | |
138 | isl6421->i2c_addr = i2c_addr; | |
13fef933 | 139 | fe->sec_priv = isl6421; |
21c28582 AQ |
140 | |
141 | /* bits which should be forced to '1' */ | |
142 | isl6421->override_or = override_set; | |
143 | ||
144 | /* bits which should be forced to '0' */ | |
145 | isl6421->override_and = ~override_clear; | |
146 | ||
147 | /* detect if it is present or not */ | |
148 | if (isl6421_set_voltage(fe, SEC_VOLTAGE_OFF)) { | |
149 | kfree(isl6421); | |
09d48954 | 150 | fe->sec_priv = NULL; |
13fef933 | 151 | return NULL; |
21c28582 AQ |
152 | } |
153 | ||
154 | /* install release callback */ | |
62a7b3e2 | 155 | fe->ops.release_sec = isl6421_release; |
21c28582 AQ |
156 | |
157 | /* override frontend ops */ | |
dea74869 PB |
158 | fe->ops.set_voltage = isl6421_set_voltage; |
159 | fe->ops.enable_high_lnb_voltage = isl6421_enable_high_lnb_voltage; | |
48a8a03b MCC |
160 | if (override_tone) |
161 | fe->ops.set_tone = isl6421_set_tone; | |
21c28582 | 162 | |
13fef933 | 163 | return fe; |
21c28582 AQ |
164 | } |
165 | EXPORT_SYMBOL(isl6421_attach); | |
166 | ||
167 | MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6421"); | |
168 | MODULE_AUTHOR("Andrew de Quincey & Oliver Endriss"); | |
169 | MODULE_LICENSE("GPL"); |