2 * lnbp21.h - driver for lnb supply and control ic lnbp21
4 * Copyright (C) 2006 Oliver Endriss
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.
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.
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
24 * the project's page is at http://www.linuxtv.org
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
44 struct i2c_adapter *i2c;
45 void (*release_chain)(struct dvb_frontend* fe);
48 static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
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) };
55 lnbp21->config &= ~(LNBP21_VSEL | LNBP21_EN);
61 lnbp21->config |= LNBP21_EN;
64 lnbp21->config |= (LNBP21_EN | LNBP21_VSEL);
70 lnbp21->config |= lnbp21->override_or;
71 lnbp21->config &= lnbp21->override_and;
73 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
76 static int lnbp21_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg)
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) };
84 lnbp21->config |= LNBP21_LLC;
86 lnbp21->config &= ~LNBP21_LLC;
88 lnbp21->config |= lnbp21->override_or;
89 lnbp21->config &= lnbp21->override_and;
91 return (i2c_transfer(lnbp21->i2c, &msg, 1) == 1) ? 0 : -EIO;
94 static void lnbp21_exit(struct dvb_frontend *fe)
96 struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv;
99 lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);
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);
109 static int lnbp21_init(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear)
111 struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL);
116 /* default configuration */
117 lnbp21->config = LNBP21_ISEL;
119 /* bits which should be forced to '1' */
120 lnbp21->override_or = override_set;
122 /* bits which should be forced to '0' */
123 lnbp21->override_and = ~override_clear;
125 /* install release callback */
126 lnbp21->release_chain = fe->ops->release;
127 fe->ops->release = lnbp21_exit;
129 /* override frontend ops */
130 fe->ops->set_voltage = lnbp21_set_voltage;
131 fe->ops->enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage;
134 fe->misc_priv = lnbp21;
136 return lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF);