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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 | /* * lnbp21.c - driver for lnb supply and control ic lnbp21 * * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de> * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * To obtain the license, point your browser to * http://www.gnu.org/copyleft/gpl.html * * * the project's page is at https://linuxtv.org */ #include <linux/delay.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/string.h> #include <linux/slab.h> #include <media/dvb_frontend.h> #include "lnbp21.h" #include "lnbh24.h" struct lnbp21 { u8 config; u8 override_or; u8 override_and; struct i2c_adapter *i2c; u8 i2c_addr; }; static int lnbp21_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage) { struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, .buf = &lnbp21->config, .len = sizeof(lnbp21->config) }; lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN); switch(voltage) { case SEC_VOLTAGE_OFF: break; case SEC_VOLTAGE_13: lnbp21->config |= LNBP21_EN; break; case SEC_VOLTAGE_18: lnbp21->config |= (LNBP21_EN | LNBP21_VSEL); break; default: return -EINVAL; } lnbp21->config |= lnbp21->override_or; lnbp21->config &= lnbp21->override_and; return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; } static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) { struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, .buf = &lnbp21->config, .len = sizeof(lnbp21->config) }; if (arg) lnbp21->config |= LNBP21_LLC; else lnbp21->config &= ~LNBP21_LLC; lnbp21->config |= lnbp21->override_or; lnbp21->config &= lnbp21->override_and; return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; } static int lnbp21_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone) { struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, .buf = &lnbp21->config, .len = sizeof(lnbp21->config) }; switch (tone) { case SEC_TONE_OFF: lnbp21->config &= ~LNBP21_TEN; break; case SEC_TONE_ON: lnbp21->config |= LNBP21_TEN; break; default: return -EINVAL; } lnbp21->config |= lnbp21->override_or; lnbp21->config &= lnbp21->override_and; return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; } static void lnbp21_release(struct dvb_frontend *fe) { /* LNBP power off */ lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF); /* free data */ kfree(fe->sec_priv); fe->sec_priv = NULL; } static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear, u8 i2c_addr, u8 config) { struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL); if (!lnbp21) return NULL; /* default configuration */ lnbp21->config = config; lnbp21->i2c = i2c; lnbp21->i2c_addr = i2c_addr; fe->sec_priv = lnbp21; /* bits which should be forced to '1' */ lnbp21->override_or = override_set; /* bits which should be forced to '0' */ lnbp21->override_and = ~override_clear; /* detect if it is present or not */ if (lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF)) { kfree(lnbp21); return NULL; } /* install release callback */ fe->ops.release_sec = lnbp21_release; /* override frontend ops */ fe->ops.set_voltage = lnbp21_set_voltage; fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/ fe->ops.set_tone = lnbp21_set_tone; printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr); return fe; } struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear, u8 i2c_addr) { return lnbx2x_attach(fe, i2c, override_set, override_clear, i2c_addr, LNBH24_TTX); } EXPORT_SYMBOL(lnbh24_attach); struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear) { return lnbx2x_attach(fe, i2c, override_set, override_clear, 0x08, LNBP21_ISEL); } EXPORT_SYMBOL(lnbp21_attach); MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24"); MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin"); MODULE_LICENSE("GPL"); |