V4L/DVB (4606): Add driver for TUA6100
This driver was originally in budget-av.c, however I have extracted it into a seperate file to permit reuse. I also reworked the code to make it maintainable. I then examined the KNC1 windows drivers and rewrote the code in order to configure the PLL as they do. This solves a lot of reported tuning problems. Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Andrew de Quincey
Mauro Carvalho Chehab
parent
c4e4aac887
commit
00be2e7c64
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@ -296,4 +296,11 @@ config DVB_ISL6421
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help
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An SEC control chip.
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config DVB_TUA6100
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tristate "TUA6100 PLL"
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depends on DVB_CORE && I2C
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default m if DVB_FE_CUSTOMISE
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help
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A DVBS PLL chip.
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endmenu
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@ -36,3 +36,4 @@ obj-$(CONFIG_DVB_ISL6421) += isl6421.o
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obj-$(CONFIG_DVB_TDA10086) += tda10086.o
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obj-$(CONFIG_DVB_TDA826X) += tda826x.o
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obj-$(CONFIG_DVB_TUNER_MT2060) += mt2060.o
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obj-$(CONFIG_DVB_TUA6100) += tua6100.o
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@ -0,0 +1,205 @@
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/**
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* Driver for Infineon tua6100 pll.
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*
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* (c) 2006 Andrew de Quincey
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*
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* Based on code found in budget-av.c, which has the following:
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* Compiled from various sources by Michael Hunold <michael@mihu.de>
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*
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* CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &
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* Andrew de Quincey <adq_dvb@lidskialf.net>
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*
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* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
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*
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* Copyright (C) 1999-2002 Ralph Metzler
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* & Marcus Metzler for convergence integrated media GmbH
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/dvb/frontend.h>
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#include <asm/types.h>
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#include "tua6100.h"
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struct tua6100_priv {
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/* i2c details */
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int i2c_address;
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struct i2c_adapter *i2c;
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u32 frequency;
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};
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static int tua6100_release(struct dvb_frontend *fe)
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{
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if (fe->tuner_priv)
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kfree(fe->tuner_priv);
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fe->tuner_priv = NULL;
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return 0;
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}
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static int tua6100_sleep(struct dvb_frontend *fe)
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{
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struct tua6100_priv *priv = fe->tuner_priv;
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int ret;
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u8 reg0[] = { 0x00, 0x00 };
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struct i2c_msg msg = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if ((ret = i2c_transfer (priv->i2c, &msg, 1)) != 1) {
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printk("%s: i2c error\n", __FUNCTION__);
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}
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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return (ret == 1) ? 0 : ret;
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}
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static int tua6100_set_params(struct dvb_frontend *fe,
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struct dvb_frontend_parameters *params)
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{
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struct tua6100_priv *priv = fe->tuner_priv;
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u32 div;
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u32 prediv;
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u8 reg0[] = { 0x00, 0x00 };
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u8 reg1[] = { 0x01, 0x00, 0x00, 0x00 };
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u8 reg2[] = { 0x02, 0x00, 0x00 };
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struct i2c_msg msg0 = { .addr = priv->i2c_address, .flags = 0, .buf = reg0, .len = 2 };
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struct i2c_msg msg1 = { .addr = priv->i2c_address, .flags = 0, .buf = reg1, .len = 4 };
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struct i2c_msg msg2 = { .addr = priv->i2c_address, .flags = 0, .buf = reg2, .len = 3 };
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#define _R 4
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#define _P 32
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#define _ri 4000000
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// setup register 0
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if (params->frequency < 2000000) {
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reg0[1] = 0x03;
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} else {
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reg0[1] = 0x07;
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}
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// setup register 1
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if (params->frequency < 1630000) {
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reg1[1] = 0x2c;
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} else {
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reg1[1] = 0x0c;
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}
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if (_P == 64)
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reg1[1] |= 0x40;
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if (params->frequency >= 1525000)
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reg1[1] |= 0x80;
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// register 2
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reg2[1] = (_R >> 8) & 0x03;
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reg2[2] = _R;
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if (params->frequency < 1455000) {
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reg2[1] |= 0x1c;
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} else if (params->frequency < 1630000) {
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reg2[1] |= 0x0c;
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} else {
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reg2[1] |= 0x1c;
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}
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// The N divisor ratio (note: params->frequency is in kHz, but we need it in Hz)
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prediv = (params->frequency * _R) / (_ri / 1000);
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div = prediv / _P;
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reg1[1] |= (div >> 9) & 0x03;
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reg1[2] = div >> 1;
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reg1[3] = (div << 7);
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priv->frequency = ((div * _P) * (_ri / 1000)) / _R;
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// Finally, calculate and store the value for A
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reg1[3] |= (prediv - (div*_P)) & 0x7f;
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#undef _R
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#undef _P
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#undef _ri
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c, &msg0, 1) != 1)
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return -EIO;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c, &msg2, 1) != 1)
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return -EIO;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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if (i2c_transfer(priv->i2c, &msg1, 1) != 1)
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return -EIO;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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return 0;
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}
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static int tua6100_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct tua6100_priv *priv = fe->tuner_priv;
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*frequency = priv->frequency;
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return 0;
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}
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static struct dvb_tuner_ops tua6100_tuner_ops = {
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.info = {
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.name = "Infineon TUA6100",
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.frequency_min = 950000,
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.frequency_max = 2150000,
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.frequency_step = 1000,
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},
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.release = tua6100_release,
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.sleep = tua6100_sleep,
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.set_params = tua6100_set_params,
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.get_frequency = tua6100_get_frequency,
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};
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struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c)
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{
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struct tua6100_priv *priv = NULL;
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u8 b1 [] = { 0x80 };
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u8 b2 [] = { 0x00 };
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struct i2c_msg msg [] = { { .addr = addr, .flags = 0, .buf = b1, .len = 1 },
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{ .addr = addr, .flags = I2C_M_RD, .buf = b2, .len = 1 } };
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int ret;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1);
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ret = i2c_transfer (i2c, msg, 2);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0);
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if (ret != 2)
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return NULL;
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priv = kzalloc(sizeof(struct tua6100_priv), GFP_KERNEL);
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if (priv == NULL)
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return NULL;
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priv->i2c_address = addr;
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priv->i2c = i2c;
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memcpy(&fe->ops.tuner_ops, &tua6100_tuner_ops, sizeof(struct dvb_tuner_ops));
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fe->tuner_priv = priv;
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return fe;
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}
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EXPORT_SYMBOL(tua6100_attach);
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MODULE_DESCRIPTION("DVB tua6100 driver");
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MODULE_AUTHOR("Andrew de Quincey");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,47 @@
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/**
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* Driver for Infineon tua6100 PLL.
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*
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* (c) 2006 Andrew de Quincey
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*
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* Based on code found in budget-av.c, which has the following:
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* Compiled from various sources by Michael Hunold <michael@mihu.de>
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*
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* CI interface support (c) 2004 Olivier Gournet <ogournet@anevia.com> &
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* Andrew de Quincey <adq_dvb@lidskialf.net>
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*
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* Copyright (C) 2002 Ralph Metzler <rjkm@metzlerbros.de>
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*
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* Copyright (C) 1999-2002 Ralph Metzler
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* & Marcus Metzler for convergence integrated media GmbH
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __DVB_TUA6100_H__
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#define __DVB_TUA6100_H__
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#include <linux/i2c.h>
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#include "dvb_frontend.h"
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/**
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* Attach a tua6100 pll to the supplied frontend structure.
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*
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* @param fe Frontend to attach to.
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* @param addr i2c address of the pll.
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* @param i2c i2c adapter to use.
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* @return FE pointer on success, NULL on failure.
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*/
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extern struct dvb_frontend *tua6100_attach(struct dvb_frontend *fe, int addr, struct i2c_adapter *i2c);
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#endif
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