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V4L/DVB (3932): Convert lnbp21 to a module
Convert lnbp21.h into a linux kernel module. Fix up previous users to use it. Convert dvb-ttusb-budget to use it. Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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Andrew de Quincey
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Mauro Carvalho Chehab
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Jun 25, 2006
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,145 @@ | ||
| /* | ||
| * 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; | ||
| void (*release_chain)(struct dvb_frontend* fe); | ||
| }; | ||
|
|
||
| static int lnbp21_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) | ||
| { | ||
| struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_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->misc_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) | ||
| { | ||
| struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->misc_priv; | ||
|
|
||
| /* LNBP power off */ | ||
| lnbp21_set_voltage(fe, SEC_VOLTAGE_OFF); | ||
|
|
||
| /* free data & call next release routine */ | ||
| fe->ops->release = lnbp21->release_chain; | ||
| kfree(fe->misc_priv); | ||
| fe->misc_priv = NULL; | ||
| if (fe->ops->release) | ||
| fe->ops->release(fe); | ||
| } | ||
|
|
||
| int 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 -ENOMEM; | ||
|
|
||
| /* default configuration */ | ||
| lnbp21->config = LNBP21_ISEL; | ||
| lnbp21->i2c = i2c; | ||
| fe->misc_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); | ||
| fe->misc_priv = NULL; | ||
| return -EIO; | ||
| } | ||
|
|
||
| /* install release callback */ | ||
| lnbp21->release_chain = fe->ops->release; | ||
| 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 0; | ||
| } | ||
| EXPORT_SYMBOL(lnbp21_attach); | ||
|
|
||
| MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21"); | ||
| MODULE_AUTHOR("Oliver Endriss"); | ||
| MODULE_LICENSE("GPL"); |
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