/* * lnbp21.c - driver for lnb supply and control ic lnbp21 * * Copyright (C) 2006, 2009 Oliver Endriss <o.endriss@gmx.de> * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru> * * 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/string.h> #include <linux/slab.h> #include "dvb_frontend.h" #include "lnbp21.h" #include "lnbh24.h" struct lnbp21 { u8 config; u8 override_or; u8 override_and; struct i2c_adapter *i2c; u8 i2c_addr; }; 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 = lnbp21->i2c_addr, .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 = lnbp21->i2c_addr, .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 int lnbp21_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone) { struct lnbp21 *lnbp21 = (struct lnbp21 *) fe->sec_priv; struct i2c_msg msg = { .addr = lnbp21->i2c_addr, .flags = 0, .buf = &lnbp21->config, .len = sizeof(lnbp21->config) }; switch (tone) { case SEC_TONE_OFF: lnbp21->config &= ~LNBP21_TEN; break; case SEC_TONE_ON: lnbp21->config |= LNBP21_TEN; 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 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; } static struct dvb_frontend *lnbx2x_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear, u8 i2c_addr, u8 config) { struct lnbp21 *lnbp21 = kmalloc(sizeof(struct lnbp21), GFP_KERNEL); if (!lnbp21) return NULL; /* default configuration */ lnbp21->config = config; lnbp21->i2c = i2c; lnbp21->i2c_addr = i2c_addr; 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_sec = lnbp21_release; /* override frontend ops */ fe->ops.set_voltage = lnbp21_set_voltage; fe->ops.enable_high_lnb_voltage = lnbp21_enable_high_lnb_voltage; if (!(override_clear & LNBH24_TEN)) /*22kHz logic controlled by demod*/ fe->ops.set_tone = lnbp21_set_tone; printk(KERN_INFO "LNBx2x attached on addr=%x\n", lnbp21->i2c_addr); return fe; } struct dvb_frontend *lnbh24_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear, u8 i2c_addr) { return lnbx2x_attach(fe, i2c, override_set, override_clear, i2c_addr, LNBH24_TTX); } EXPORT_SYMBOL(lnbh24_attach); struct dvb_frontend *lnbp21_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, u8 override_set, u8 override_clear) { return lnbx2x_attach(fe, i2c, override_set, override_clear, 0x08, LNBP21_ISEL); } EXPORT_SYMBOL(lnbp21_attach); MODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp21, lnbh24"); MODULE_AUTHOR("Oliver Endriss, Igor M. Liplianin"); MODULE_LICENSE("GPL");