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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 | // SPDX-License-Identifier: GPL-2.0-or-later /* * lnbp22.h - driver for lnb supply and control ic lnbp22 * * Copyright (C) 2006 Dominik Kuhlen * Based on lnbp21 driver * * 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/moduleparam.h> #include <linux/string.h> #include <linux/slab.h> #include <media/dvb_frontend.h> #include "lnbp22.h" static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); #define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg) struct lnbp22 { u8 config[4]; struct i2c_adapter *i2c; }; static int lnbp22_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage) { struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv; struct i2c_msg msg = { .addr = 0x08, .flags = 0, .buf = (char *)&lnbp22->config, .len = sizeof(lnbp22->config), }; dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage, SEC_VOLTAGE_18, SEC_VOLTAGE_13); lnbp22->config[3] = 0x60; /* Power down */ switch (voltage) { case SEC_VOLTAGE_OFF: break; case SEC_VOLTAGE_13: lnbp22->config[3] |= LNBP22_EN; break; case SEC_VOLTAGE_18: lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL); break; default: return -EINVAL; } dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]); return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; } static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) { struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv; struct i2c_msg msg = { .addr = 0x08, .flags = 0, .buf = (char *)&lnbp22->config, .len = sizeof(lnbp22->config), }; dprintk(1, "%s: %d\n", __func__, (int)arg); if (arg) lnbp22->config[3] |= LNBP22_LLC; else lnbp22->config[3] &= ~LNBP22_LLC; return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; } static void lnbp22_release(struct dvb_frontend *fe) { dprintk(1, "%s\n", __func__); /* LNBP power off */ lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF); /* free data */ kfree(fe->sec_priv); fe->sec_priv = NULL; } struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c) { struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL); if (!lnbp22) return NULL; /* default configuration */ lnbp22->config[0] = 0x00; /* ? */ lnbp22->config[1] = 0x28; /* ? */ lnbp22->config[2] = 0x48; /* ? */ lnbp22->config[3] = 0x60; /* Power down */ lnbp22->i2c = i2c; fe->sec_priv = lnbp22; /* detect if it is present or not */ if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) { dprintk(0, "%s LNBP22 not found\n", __func__); kfree(lnbp22); fe->sec_priv = NULL; return NULL; } /* install release callback */ fe->ops.release_sec = lnbp22_release; /* override frontend ops */ fe->ops.set_voltage = lnbp22_set_voltage; fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage; return fe; } EXPORT_SYMBOL_GPL(lnbp22_attach); MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22"); MODULE_AUTHOR("Dominik Kuhlen"); MODULE_LICENSE("GPL"); |