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a0c7056f | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
4b1431ca HH |
2 | /* |
3 | * isl6405.c - driver for dual lnb supply and control ic ISL6405 | |
4 | * | |
5 | * Copyright (C) 2008 Hartmut Hackmann | |
6 | * Copyright (C) 2006 Oliver Endriss | |
7 | * | |
991ce92f | 8 | * the project's page is at https://linuxtv.org |
4b1431ca HH |
9 | */ |
10 | #include <linux/delay.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/string.h> | |
16 | #include <linux/slab.h> | |
17 | ||
fada1935 | 18 | #include <media/dvb_frontend.h> |
4b1431ca HH |
19 | #include "isl6405.h" |
20 | ||
21 | struct isl6405 { | |
22 | u8 config; | |
23 | u8 override_or; | |
24 | u8 override_and; | |
25 | struct i2c_adapter *i2c; | |
26 | u8 i2c_addr; | |
27 | }; | |
28 | ||
0df289a2 MCC |
29 | static int isl6405_set_voltage(struct dvb_frontend *fe, |
30 | enum fe_sec_voltage voltage) | |
4b1431ca HH |
31 | { |
32 | struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv; | |
33 | struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0, | |
34 | .buf = &isl6405->config, | |
35 | .len = sizeof(isl6405->config) }; | |
36 | ||
37 | if (isl6405->override_or & 0x80) { | |
38 | isl6405->config &= ~(ISL6405_VSEL2 | ISL6405_EN2); | |
39 | switch (voltage) { | |
40 | case SEC_VOLTAGE_OFF: | |
41 | break; | |
42 | case SEC_VOLTAGE_13: | |
43 | isl6405->config |= ISL6405_EN2; | |
44 | break; | |
45 | case SEC_VOLTAGE_18: | |
46 | isl6405->config |= (ISL6405_EN2 | ISL6405_VSEL2); | |
47 | break; | |
48 | default: | |
49 | return -EINVAL; | |
50 | } | |
51 | } else { | |
52 | isl6405->config &= ~(ISL6405_VSEL1 | ISL6405_EN1); | |
53 | switch (voltage) { | |
54 | case SEC_VOLTAGE_OFF: | |
55 | break; | |
56 | case SEC_VOLTAGE_13: | |
57 | isl6405->config |= ISL6405_EN1; | |
58 | break; | |
59 | case SEC_VOLTAGE_18: | |
60 | isl6405->config |= (ISL6405_EN1 | ISL6405_VSEL1); | |
61 | break; | |
62 | default: | |
63 | return -EINVAL; | |
c2c1b415 | 64 | } |
4b1431ca HH |
65 | } |
66 | isl6405->config |= isl6405->override_or; | |
67 | isl6405->config &= isl6405->override_and; | |
68 | ||
69 | return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
70 | } | |
71 | ||
72 | static int isl6405_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) | |
73 | { | |
74 | struct isl6405 *isl6405 = (struct isl6405 *) fe->sec_priv; | |
75 | struct i2c_msg msg = { .addr = isl6405->i2c_addr, .flags = 0, | |
76 | .buf = &isl6405->config, | |
77 | .len = sizeof(isl6405->config) }; | |
78 | ||
79 | if (isl6405->override_or & 0x80) { | |
80 | if (arg) | |
81 | isl6405->config |= ISL6405_LLC2; | |
82 | else | |
83 | isl6405->config &= ~ISL6405_LLC2; | |
84 | } else { | |
85 | if (arg) | |
86 | isl6405->config |= ISL6405_LLC1; | |
87 | else | |
88 | isl6405->config &= ~ISL6405_LLC1; | |
89 | } | |
90 | isl6405->config |= isl6405->override_or; | |
91 | isl6405->config &= isl6405->override_and; | |
92 | ||
93 | return (i2c_transfer(isl6405->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
94 | } | |
95 | ||
96 | static void isl6405_release(struct dvb_frontend *fe) | |
97 | { | |
98 | /* power off */ | |
99 | isl6405_set_voltage(fe, SEC_VOLTAGE_OFF); | |
100 | ||
101 | /* free */ | |
102 | kfree(fe->sec_priv); | |
103 | fe->sec_priv = NULL; | |
104 | } | |
105 | ||
106 | struct dvb_frontend *isl6405_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, | |
107 | u8 i2c_addr, u8 override_set, u8 override_clear) | |
108 | { | |
109 | struct isl6405 *isl6405 = kmalloc(sizeof(struct isl6405), GFP_KERNEL); | |
110 | if (!isl6405) | |
111 | return NULL; | |
112 | ||
113 | /* default configuration */ | |
114 | if (override_set & 0x80) | |
115 | isl6405->config = ISL6405_ISEL2; | |
116 | else | |
117 | isl6405->config = ISL6405_ISEL1; | |
118 | isl6405->i2c = i2c; | |
119 | isl6405->i2c_addr = i2c_addr; | |
120 | fe->sec_priv = isl6405; | |
121 | ||
122 | /* bits which should be forced to '1' */ | |
123 | isl6405->override_or = override_set; | |
124 | ||
125 | /* bits which should be forced to '0' */ | |
126 | isl6405->override_and = ~override_clear; | |
127 | ||
128 | /* detect if it is present or not */ | |
129 | if (isl6405_set_voltage(fe, SEC_VOLTAGE_OFF)) { | |
130 | kfree(isl6405); | |
131 | fe->sec_priv = NULL; | |
132 | return NULL; | |
133 | } | |
134 | ||
135 | /* install release callback */ | |
136 | fe->ops.release_sec = isl6405_release; | |
137 | ||
138 | /* override frontend ops */ | |
139 | fe->ops.set_voltage = isl6405_set_voltage; | |
140 | fe->ops.enable_high_lnb_voltage = isl6405_enable_high_lnb_voltage; | |
141 | ||
142 | return fe; | |
143 | } | |
144 | EXPORT_SYMBOL(isl6405_attach); | |
145 | ||
146 | MODULE_DESCRIPTION("Driver for lnb supply and control ic isl6405"); | |
147 | MODULE_AUTHOR("Hartmut Hackmann & Oliver Endriss"); | |
148 | MODULE_LICENSE("GPL"); |