projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4e2c53fd IL |
1 | /* |
| 2 | * lnbp22.h - driver for lnb supply and control ic lnbp22 | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Dominik Kuhlen | |
| 5 | * Based on lnbp21 driver | |
| 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 | * | |
| 25 | * the project's page is at http://www.linuxtv.org | |
| 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> | |
| 32 | #include <linux/moduleparam.h> | |
| 33 | #include <linux/string.h> | |
| 34 | #include <linux/slab.h> | |
| 35 | ||
| 36 | #include "dvb_frontend.h" | |
| 37 | #include "lnbp22.h" | |
| 38 | ||
| 39 | static int debug; | |
| 40 | module_param(debug, int, 0644); | |
| 41 | MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); | |
| 42 | ||
| 43 | ||
| 44 | #define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg) | |
| 45 | ||
| 46 | struct lnbp22 { | |
| 47 | u8 config[4]; | |
| 48 | struct i2c_adapter *i2c; | |
| 49 | }; | |
| 50 | ||
| 51 | static int lnbp22_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) | |
| 52 | { | |
| 53 | struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv; | |
| 54 | struct i2c_msg msg = { | |
| 55 | .addr = 0x08, | |
| 56 | .flags = 0, | |
| 57 | .buf = (char *)&lnbp22->config, | |
| 58 | .len = sizeof(lnbp22->config), | |
| 59 | }; | |
| 60 | ||
| 61 | dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage, | |
| 62 | SEC_VOLTAGE_18, SEC_VOLTAGE_13); | |
| 63 | ||
| 64 | lnbp22->config[3] = 0x60; /* Power down */ | |
| 65 | switch (voltage) { | |
| 66 | case SEC_VOLTAGE_OFF: | |
| 67 | break; | |
| 68 | case SEC_VOLTAGE_13: | |
| 69 | lnbp22->config[3] |= LNBP22_EN; | |
| 70 | break; | |
| 71 | case SEC_VOLTAGE_18: | |
| 72 | lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL); | |
| 73 | break; | |
| 74 | default: | |
| 75 | return -EINVAL; | |
| c2c1b415 | 76 | } |
| 4e2c53fd IL |
77 | |
| 78 | dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]); | |
| 79 | return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
| 80 | } | |
| 81 | ||
| 82 | static int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) | |
| 83 | { | |
| 84 | struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv; | |
| 85 | struct i2c_msg msg = { | |
| 86 | .addr = 0x08, | |
| 87 | .flags = 0, | |
| 88 | .buf = (char *)&lnbp22->config, | |
| 89 | .len = sizeof(lnbp22->config), | |
| 90 | }; | |
| 91 | ||
| 92 | dprintk(1, "%s: %d\n", __func__, (int)arg); | |
| 93 | if (arg) | |
| 94 | lnbp22->config[3] |= LNBP22_LLC; | |
| 95 | else | |
| 96 | lnbp22->config[3] &= ~LNBP22_LLC; | |
| 97 | ||
| 98 | return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; | |
| 99 | } | |
| 100 | ||
| 101 | static void lnbp22_release(struct dvb_frontend *fe) | |
| 102 | { | |
| 103 | dprintk(1, "%s\n", __func__); | |
| 104 | /* LNBP power off */ | |
| 105 | lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF); | |
| 106 | ||
| 107 | /* free data */ | |
| 108 | kfree(fe->sec_priv); | |
| 109 | fe->sec_priv = NULL; | |
| 110 | } | |
| 111 | ||
| 112 | struct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe, | |
| 113 | struct i2c_adapter *i2c) | |
| 114 | { | |
| 115 | struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL); | |
| 116 | if (!lnbp22) | |
| 117 | return NULL; | |
| 118 | ||
| 119 | /* default configuration */ | |
| 120 | lnbp22->config[0] = 0x00; /* ? */ | |
| 121 | lnbp22->config[1] = 0x28; /* ? */ | |
| 122 | lnbp22->config[2] = 0x48; /* ? */ | |
| 123 | lnbp22->config[3] = 0x60; /* Power down */ | |
| 124 | lnbp22->i2c = i2c; | |
| 125 | fe->sec_priv = lnbp22; | |
| 126 | ||
| 127 | /* detect if it is present or not */ | |
| 128 | if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) { | |
| 129 | dprintk(0, "%s LNBP22 not found\n", __func__); | |
| 130 | kfree(lnbp22); | |
| 131 | fe->sec_priv = NULL; | |
| 132 | return NULL; | |
| 133 | } | |
| 134 | ||
| 135 | /* install release callback */ | |
| 136 | fe->ops.release_sec = lnbp22_release; | |
| 137 | ||
| 138 | /* override frontend ops */ | |
| 139 | fe->ops.set_voltage = lnbp22_set_voltage; | |
| 140 | fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage; | |
| 141 | ||
| 142 | return fe; | |
| 143 | } | |
| 144 | EXPORT_SYMBOL(lnbp22_attach); | |
| 145 | ||
| 146 | MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22"); | |
| 147 | MODULE_AUTHOR("Dominik Kuhlen"); | |
| 148 | MODULE_LICENSE("GPL"); |