Oliver Endriss | 2f27bdc | 2006-02-28 09:31:16 -0300 | [diff] [blame] | 1 | /* |
| 2 | * lnbp21.h - driver for lnb supply and control ic lnbp21 |
| 3 | * |
| 4 | * Copyright (C) 2006 Oliver Endriss |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 21 | * Or, point your browser to http://www.gnu.org/copyleft/gpl.html |
| 22 | * |
| 23 | * |
| 24 | * the project's page is at http://www.linuxtv.org |
| 25 | */ |
| 26 | |
| 27 | #ifndef _LNBP21_H |
| 28 | #define _LNBP21_H |
| 29 | |
| 30 | /* system register */ |
| 31 | #define LNBP21_OLF 0x01 |
| 32 | #define LNBP21_OTF 0x02 |
| 33 | #define LNBP21_EN 0x04 |
| 34 | #define LNBP21_VSEL 0x08 |
| 35 | #define LNBP21_LLC 0x10 |
| 36 | #define LNBP21_TEN 0x20 |
| 37 | #define LNBP21_ISEL 0x40 |
| 38 | #define LNBP21_PCL 0x80 |
| 39 | |
| 40 | struct lnbp21 { |
| 41 | u8 config; |
| 42 | u8 override_or; |
| 43 | u8 override_and; |
| 44 | struct i2c_adapter *i2c; |
| 45 | void (*release_chain)(struct dvb_frontend* fe); |
| 46 | }; |
| 47 | |
| 48 | static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) |
| 49 | { |
| 50 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv; |
| 51 | struct i2c_msg msg = { .addr = 0x08, .flags = 0, |
| 52 | .buf = &lnbp21->config, |
| 53 | .len = sizeof(lnbp21->config) }; |
| 54 | |
| 55 | lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN); |
| 56 | |
| 57 | switch(voltage) { |
| 58 | case SEC_VOLTAGE_OFF: |
| 59 | break; |
| 60 | case SEC_VOLTAGE_13: |
| 61 | lnbp21->config |= LNBP21_EN; |
| 62 | break; |
| 63 | case SEC_VOLTAGE_18: |
| 64 | lnbp21->config |= (LNBP21_EN | LNBP21_VSEL); |
| 65 | break; |
| 66 | default: |
| 67 | return -EINVAL; |
| 68 | }; |
| 69 | |
| 70 | lnbp21->config |= lnbp21->override_or; |
| 71 | lnbp21->config &= lnbp21->override_and; |
| 72 | |
| 73 | return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; |
| 74 | } |
| 75 | |
| 76 | static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) |
| 77 | { |
| 78 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv; |
| 79 | struct i2c_msg msg = { .addr = 0x08, .flags = 0, |
| 80 | .buf = &lnbp21->config, |
| 81 | .len = sizeof(lnbp21->config) }; |
| 82 | |
| 83 | if (arg) |
| 84 | lnbp21->config |= LNBP21_LLC; |
| 85 | else |
| 86 | lnbp21->config &= ~LNBP21_LLC; |
| 87 | |
| 88 | lnbp21->config |= lnbp21->override_or; |
| 89 | lnbp21->config &= lnbp21->override_and; |
| 90 | |
| 91 | return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO; |
| 92 | } |
| 93 | |
| 94 | static void lnbp21_exit(struct dvb_frontend *fe) |
| 95 | { |
| 96 | struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv; |
| 97 | |
| 98 | /* LNBP power off */ |
| 99 | lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF); |
| 100 | |
| 101 | /* free data & call next release routine */ |
| 102 | fe->ops->release = lnbp21->release_chain; |
| 103 | kfree(fe->misc_priv); |
| 104 | fe->misc_priv = NULL; |
| 105 | if (fe->ops->release) |
| 106 | fe->ops->release(fe); |
| 107 | } |
| 108 | |
| 109 | static int lnbp21_init(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear) |
| 110 | { |
| 111 | struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL); |
| 112 | |
| 113 | if (!lnbp21) |
| 114 | return -ENOMEM; |
| 115 | |
| 116 | /* default configuration */ |
| 117 | lnbp21->config = LNBP21_ISEL; |
| 118 | |
| 119 | /* bits which should be forced to '1' */ |
| 120 | lnbp21->override_or = override_set; |
| 121 | |
| 122 | /* bits which should be forced to '0' */ |
| 123 | lnbp21->override_and = ~override_clear; |
| 124 | |
| 125 | /* install release callback */ |
| 126 | lnbp21->release_chain = fe->ops->release; |
| 127 | fe->ops->release = lnbp21_exit; |
| 128 | |
| 129 | /* override frontend ops */ |
| 130 | fe->ops->set_voltage = lnbp21_set_voltage; |
| 131 | fe->ops->enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; |
| 132 | |
| 133 | lnbp21->i2c = i2c; |
| 134 | fe->misc_priv = lnbp21; |
| 135 | |
| 136 | return lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF); |
| 137 | } |
| 138 | |
| 139 | #endif |