| /* |
| * lnbp21.h - driver for lnb supply and control ic lnbp21 |
| * |
| * Copyright (C) 2006 Oliver Endriss |
| * |
| * 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. |
| * |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| * Or, point your browser to http://www.gnu.org/copyleft/gpl.html |
| * |
| * |
| * the project's page is at http://www.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 "dvb_frontend.h" |
| #include "lnbp21.h" |
| |
| struct lnbp21 { |
| u8 config; |
| u8 override_or; |
| u8 override_and; |
| struct i2c_adapter *i2c; |
| }; |
| |
| static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) |
| { |
| struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; |
| struct i2c_msg msg = { .addr = 0x08, .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 = 0x08, .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 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; |
| } |
| |
| struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear) |
| { |
| struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL); |
| if (!lnbp21) |
| return NULL; |
| |
| /* default configuration */ |
| lnbp21->config = LNBP21_ISEL; |
| lnbp21->i2c = i2c; |
| 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 = lnbp21_release; |
| |
| /* override frontend ops */ |
| fe->ops.set_voltage = lnbp21_set_voltage; |
| fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; |
| |
| return fe; |
| } |
| EXPORT_SYMBOL(lnbp21_attach); |
| |
| MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21"); |
| MODULE_AUTHOR("Oliver Endriss"); |
| MODULE_LICENSE("GPL"); |