/** * Driver for Infineon tua6100 pll. * * (c) 2006 Andrew de Quincey * * Based on code found in budget-av.c, which has the following: * Compiled from various sources by Michael Hunold <michael@mihu.de> * * CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> & * Andrew de Quincey <adq_dvb@lidskialf.net> * * Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de> * * Copyright (C) 1999-2002 Ralph Metzler * & Marcus Metzler for convergence integrated media GmbH * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/slab.h> #include <linux/module.h> #include <linux/dvb/frontend.h> #include <asm/types.h> #include "tua6100.h" struct tua6100_priv { /* i2c details */ int i2c_address; struct i2c_adapter *i2c; u32 frequency; }; static int tua6100_release(struct dvb_frontend *fe) { kfree(fe->tuner_priv); fe->tuner_priv = NULL; return 0; } static int tua6100_sleep(struct dvb_frontend *fe) { struct tua6100_priv *priv = fe->tuner_priv; int ret; u8 reg0[] = { 0x00, 0x00 }; struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) { printk("%s: i2c error\n", __func__); } if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); return (ret == 1) ? 0 : ret; } static int tua6100_set_params(struct dvb_frontend *fe) { struct dtv_frontend_properties *c = &fe->dtv_property_cache; struct tua6100_priv *priv = fe->tuner_priv; u32 div; u32 prediv; u8 reg0[] = { 0x00, 0x00 }; u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 }; u8 reg2[] = { 0x02, 0x00, 0x00 }; struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 }; struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 }; struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 }; #define _R 4 #define _P 32 #define _ri 4000000 // setup register 0 if (c->frequency < 2000000) reg0[1] = 0x03; else reg0[1] = 0x07; // setup register 1 if (c->frequency < 1630000) reg1[1] = 0x2c; else reg1[1] = 0x0c; if (_P == 64) reg1[1] |= 0x40; if (c->frequency >= 1525000) reg1[1] |= 0x80; // register 2 reg2[1] = (_R >> 8) & 0x03; reg2[2] = _R; if (c->frequency < 1455000) reg2[1] |= 0x1c; else if (c->frequency < 1630000) reg2[1] |= 0x0c; else reg2[1] |= 0x1c; /* * The N divisor ratio (note: c->frequency is in kHz, but we * need it in Hz) */ prediv = (c->frequency * _R) / (_ri / 1000); div = prediv / _P; reg1[1] |= (div >> 9) & 0x03; reg1[2] = div >> 1; reg1[3] = (div << 7); priv->frequency = ((div * _P) * (_ri / 1000)) / _R; // Finally, calculate and store the value for A reg1[3] |= (prediv - (div*_P)) & 0x7f; #undef _R #undef _P #undef _ri if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); if (i2c_transfer(priv->i2c, &msg0, 1) != 1) return -EIO; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); if (i2c_transfer(priv->i2c, &msg2, 1) != 1) return -EIO; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); if (i2c_transfer(priv->i2c, &msg1, 1) != 1) return -EIO; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); return 0; } static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) { struct tua6100_priv *priv = fe->tuner_priv; *frequency = priv->frequency; return 0; } static struct dvb_tuner_ops tua6100_tuner_ops = { .info = { .name = "Infineon TUA6100", .frequency_min = 950000, .frequency_max = 2150000, .frequency_step = 1000, }, .release = tua6100_release, .sleep = tua6100_sleep, .set_params = tua6100_set_params, .get_frequency = tua6100_get_frequency, }; struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c) { struct tua6100_priv *priv = NULL; u8 b1 [] = { 0x80 }; u8 b2 [] = { 0x00 }; struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 }, { .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } }; int ret; if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); ret = i2c_transfer (i2c, msg, 2); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); if (ret != 2) return NULL; priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL); if (priv == NULL) return NULL; priv->i2c_address = addr; priv->i2c = i2c; memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops)); fe->tuner_priv = priv; return fe; } EXPORT_SYMBOL(tua6100_attach); MODULE_DESCRIPTION("DVB tua6100 driver"); MODULE_AUTHOR("Andrew de Quincey"); MODULE_LICENSE("GPL");