14e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin/* 24e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * lnbp22.h - driver for lnb supply and control ic lnbp22 34e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 44e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * Copyright (C) 2006 Dominik Kuhlen 54e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * Based on lnbp21 driver 64e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 74e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * This program is free software; you can redistribute it and/or 84e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * modify it under the terms of the GNU General Public License 94e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * as published by the Free Software Foundation; either version 2 104e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * of the License, or (at your option) any later version. 114e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 124e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 134e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * This program is distributed in the hope that it will be useful, 144e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * but WITHOUT ANY WARRANTY; without even the implied warranty of 154e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 164e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * GNU General Public License for more details. 174e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 184e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 194e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * You should have received a copy of the GNU General Public License 204e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * along with this program; if not, write to the Free Software 214e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 224e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * Or, point your browser to http://www.gnu.org/copyleft/gpl.html 234e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 244e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * 254e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin * the project's page is at http://www.linuxtv.org 264e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin */ 274e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/delay.h> 284e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/errno.h> 294e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/init.h> 304e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/kernel.h> 314e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/module.h> 324e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/moduleparam.h> 334e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/string.h> 344e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include <linux/slab.h> 354e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 364e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include "dvb_frontend.h" 374e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#include "lnbp22.h" 384e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 394e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstatic int debug; 404e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinmodule_param(debug, int, 0644); 414e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. LiplianinMODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); 424e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 434e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 444e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin#define dprintk(lvl, arg...) if (debug >= (lvl)) printk(arg) 454e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 464e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstruct lnbp22 { 474e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin u8 config[4]; 484e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct i2c_adapter *i2c; 494e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin}; 504e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 514e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstatic int lnbp22_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage) 524e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin{ 534e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct lnbp22 *lnbp22 = (struct lnbp22 *)fe->sec_priv; 544e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct i2c_msg msg = { 554e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .addr = 0x08, 564e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .flags = 0, 574e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .buf = (char *)&lnbp22->config, 584e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .len = sizeof(lnbp22->config), 594e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin }; 604e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 614e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin dprintk(1, "%s: %d (18V=%d 13V=%d)\n", __func__, voltage, 624e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin SEC_VOLTAGE_18, SEC_VOLTAGE_13); 634e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 644e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] = 0x60; /* Power down */ 654e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin switch (voltage) { 664e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin case SEC_VOLTAGE_OFF: 674e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin break; 684e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin case SEC_VOLTAGE_13: 694e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] |= LNBP22_EN; 704e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin break; 714e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin case SEC_VOLTAGE_18: 724e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] |= (LNBP22_EN | LNBP22_VSEL); 734e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin break; 744e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin default: 754e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return -EINVAL; 76c2c1b4156a447f113ef4d167decce29399c2667cPeter Senna Tschudin } 774e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 784e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin dprintk(1, "%s: 0x%02x)\n", __func__, lnbp22->config[3]); 794e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; 804e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin} 814e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 824e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstatic int lnbp22_enable_high_lnb_voltage(struct dvb_frontend *fe, long arg) 834e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin{ 844e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct lnbp22 *lnbp22 = (struct lnbp22 *) fe->sec_priv; 854e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct i2c_msg msg = { 864e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .addr = 0x08, 874e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .flags = 0, 884e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .buf = (char *)&lnbp22->config, 894e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin .len = sizeof(lnbp22->config), 904e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin }; 914e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 924e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin dprintk(1, "%s: %d\n", __func__, (int)arg); 934e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin if (arg) 944e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] |= LNBP22_LLC; 954e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin else 964e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] &= ~LNBP22_LLC; 974e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 984e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return (i2c_transfer(lnbp22->i2c, &msg, 1) == 1) ? 0 : -EIO; 994e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin} 1004e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1014e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstatic void lnbp22_release(struct dvb_frontend *fe) 1024e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin{ 1034e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin dprintk(1, "%s\n", __func__); 1044e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* LNBP power off */ 1054e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF); 1064e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1074e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* free data */ 1084e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin kfree(fe->sec_priv); 1094e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->sec_priv = NULL; 1104e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin} 1114e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1124e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianinstruct dvb_frontend *lnbp22_attach(struct dvb_frontend *fe, 1134e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct i2c_adapter *i2c) 1144e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin{ 1154e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin struct lnbp22 *lnbp22 = kmalloc(sizeof(struct lnbp22), GFP_KERNEL); 1164e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin if (!lnbp22) 1174e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return NULL; 1184e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1194e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* default configuration */ 1204e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[0] = 0x00; /* ? */ 1214e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[1] = 0x28; /* ? */ 1224e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[2] = 0x48; /* ? */ 1234e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->config[3] = 0x60; /* Power down */ 1244e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin lnbp22->i2c = i2c; 1254e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->sec_priv = lnbp22; 1264e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1274e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* detect if it is present or not */ 1284e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin if (lnbp22_set_voltage(fe, SEC_VOLTAGE_OFF)) { 1294e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin dprintk(0, "%s LNBP22 not found\n", __func__); 1304e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin kfree(lnbp22); 1314e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->sec_priv = NULL; 1324e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return NULL; 1334e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin } 1344e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1354e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* install release callback */ 1364e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->ops.release_sec = lnbp22_release; 1374e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1384e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin /* override frontend ops */ 1394e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->ops.set_voltage = lnbp22_set_voltage; 1404e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin fe->ops.enable_high_lnb_voltage = lnbp22_enable_high_lnb_voltage; 1414e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1424e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin return fe; 1434e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin} 1444e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. LiplianinEXPORT_SYMBOL(lnbp22_attach); 1454e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. Liplianin 1464e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. LiplianinMODULE_DESCRIPTION("Driver for lnb supply and control ic lnbp22"); 1474e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. LiplianinMODULE_AUTHOR("Dominik Kuhlen"); 1484e2c53fde651be6225d9f940c02b2eabc2f9591cIgor M. LiplianinMODULE_LICENSE("GPL"); 149