1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * lnbp21.c - driver for lnb supply and control ic lnbp21
4 *
5 * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de>
6 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
7 *
8 * the project's page is at https://linuxtv.org
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
18 #include <media/dvb_frontend.h>
19 #include "lnbp21.h"
20 #include "lnbh24.h"
21
22 struct lnbp21 {
23 u8 config;
24 u8 override_or;
25 u8 override_and;
26 struct i2c_adapter *i2c;
27 u8 i2c_addr;
28 };
29
lnbp21_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)30 static int lnbp21_set_voltage(struct dvb_frontend *fe,
31 enum fe_sec_voltage voltage)
32 {
33 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
34 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
35 .buf = &lnbp21->config,
36 .len = sizeof(lnbp21->config) };
37
38 lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
39
40 switch(voltage) {
41 case SEC_VOLTAGE_OFF:
42 break;
43 case SEC_VOLTAGE_13:
44 lnbp21->config |= LNBP21_EN;
45 break;
46 case SEC_VOLTAGE_18:
47 lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
48 break;
49 default:
50 return -EINVAL;
51 }
52
53 lnbp21->config |= lnbp21->override_or;
54 lnbp21->config &= lnbp21->override_and;
55
56 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
57 }
58
lnbp21_enable_high_lnb_voltage(struct dvb_frontend * fe,long arg)59 static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
60 {
61 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
62 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
63 .buf = &lnbp21->config,
64 .len = sizeof(lnbp21->config) };
65
66 if (arg)
67 lnbp21->config |= LNBP21_LLC;
68 else
69 lnbp21->config &= ~LNBP21_LLC;
70
71 lnbp21->config |= lnbp21->override_or;
72 lnbp21->config &= lnbp21->override_and;
73
74 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
75 }
76
lnbp21_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)77 static int lnbp21_set_tone(struct dvb_frontend *fe,
78 enum fe_sec_tone_mode tone)
79 {
80 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv;
81 struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0,
82 .buf = &lnbp21->config,
83 .len = sizeof(lnbp21->config) };
84
85 switch (tone) {
86 case SEC_TONE_OFF:
87 lnbp21->config &= ~LNBP21_TEN;
88 break;
89 case SEC_TONE_ON:
90 lnbp21->config |= LNBP21_TEN;
91 break;
92 default:
93 return -EINVAL;
94 }
95
96 lnbp21->config |= lnbp21->override_or;
97 lnbp21->config &= lnbp21->override_and;
98
99 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
100 }
101
lnbp21_release(struct dvb_frontend * fe)102 static void lnbp21_release(struct dvb_frontend *fe)
103 {
104 /* LNBP power off */
105 lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
106
107 /* free data */
108 kfree(fe->sec_priv);
109 fe->sec_priv = NULL;
110 }
111
lnbx2x_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear,u8 i2c_addr,u8 config)112 static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe,
113 struct i2c_adapter *i2c, u8 override_set,
114 u8 override_clear, u8 i2c_addr, u8 config)
115 {
116 struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
117 if (!lnbp21)
118 return NULL;
119
120 /* default configuration */
121 lnbp21->config = config;
122 lnbp21->i2c = i2c;
123 lnbp21->i2c_addr = i2c_addr;
124 fe->sec_priv = lnbp21;
125
126 /* bits which should be forced to '1' */
127 lnbp21->override_or = override_set;
128
129 /* bits which should be forced to '0' */
130 lnbp21->override_and = ~override_clear;
131
132 /* detect if it is present or not */
133 if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) {
134 kfree(lnbp21);
135 return NULL;
136 }
137
138 /* install release callback */
139 fe->ops.release_sec = lnbp21_release;
140
141 /* override frontend ops */
142 fe->ops.set_voltage = lnbp21_set_voltage;
143 fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
144 if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/
145 fe->ops.set_tone = lnbp21_set_tone;
146 printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr);
147
148 return fe;
149 }
150
lnbh24_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear,u8 i2c_addr)151 struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe,
152 struct i2c_adapter *i2c, u8 override_set,
153 u8 override_clear, u8 i2c_addr)
154 {
155 return lnbx2x_attach(fe, i2c, override_set, override_clear,
156 i2c_addr, LNBH24_TTX);
157 }
158 EXPORT_SYMBOL_GPL(lnbh24_attach);
159
lnbp21_attach(struct dvb_frontend * fe,struct i2c_adapter * i2c,u8 override_set,u8 override_clear)160 struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe,
161 struct i2c_adapter *i2c, u8 override_set,
162 u8 override_clear)
163 {
164 return lnbx2x_attach(fe, i2c, override_set, override_clear,
165 0x08, LNBP21_ISEL);
166 }
167 EXPORT_SYMBOL_GPL(lnbp21_attach);
168
169 MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24");
170 MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin");
171 MODULE_LICENSE("GPL");
172