76db93d03f
This patch creates a new atsc tuner module for the LG TDVS-H06xF ATSC tuners, called lgh06xf. The purpose of this change is to reduce some duplicated code, and to allow the lgh06xf tuner code to take advantage of dvb_attach(). As a side effect, the dependency of dvb-bt8xx on dvb-pll has been removed, since the lgh06xf module itself will use dvb-pll, while remaining optional for the dvb-bt8xx driver through the use of DVB_FE_CUSTOMISE Acked-by: Andrew de Quincey <adq_dvb@lidskialf.net> Signed-off-by: Michael Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
140 lines
3.6 KiB
C
140 lines
3.6 KiB
C
/*
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* lgh06xf.c - ATSC Tuner support for LG TDVS-H06xF
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*
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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 "dvb-pll.h"
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#include "lgh06xf.h"
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#define LG_H06XF_PLL_I2C_ADDR 0x61
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struct lgh06xf_priv {
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struct i2c_adapter *i2c;
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u32 frequency;
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};
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static int lgh06xf_release(struct dvb_frontend *fe)
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{
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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 lgh06xf_set_params(struct dvb_frontend* fe,
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struct dvb_frontend_parameters* params)
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{
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struct lgh06xf_priv *priv = fe->tuner_priv;
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u8 buf[4];
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struct i2c_msg msg = { .addr = LG_H06XF_PLL_I2C_ADDR, .flags = 0,
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.buf = buf, .len = sizeof(buf) };
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u32 div;
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int i;
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int err;
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dvb_pll_configure(&dvb_pll_lg_tdvs_h06xf, buf, params->frequency, 0);
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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 ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
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printk(KERN_WARNING "lgh06xf: %s error "
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"(addr %02x <- %02x, err = %i)\n",
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__FUNCTION__, buf[0], buf[1], err);
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if (err < 0)
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return err;
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else
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return -EREMOTEIO;
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}
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/* Set the Auxiliary Byte. */
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buf[0] = buf[2];
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buf[0] &= ~0x20;
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buf[0] |= 0x18;
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buf[1] = 0x50;
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msg.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 ((err = i2c_transfer(priv->i2c, &msg, 1)) != 1) {
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printk(KERN_WARNING "lgh06xf: %s error "
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"(addr %02x <- %02x, err = %i)\n",
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__FUNCTION__, buf[0], buf[1], err);
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if (err < 0)
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return err;
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else
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return -EREMOTEIO;
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}
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// calculate the frequency we set it to
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for (i = 0; i < dvb_pll_lg_tdvs_h06xf.count; i++) {
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if (params->frequency > dvb_pll_lg_tdvs_h06xf.entries[i].limit)
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continue;
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break;
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}
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div = (params->frequency + dvb_pll_lg_tdvs_h06xf.entries[i].offset) /
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dvb_pll_lg_tdvs_h06xf.entries[i].stepsize;
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priv->frequency = (div * dvb_pll_lg_tdvs_h06xf.entries[i].stepsize) -
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dvb_pll_lg_tdvs_h06xf.entries[i].offset;
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return 0;
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}
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static int lgh06xf_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct lgh06xf_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 lgh06xf_tuner_ops = {
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.release = lgh06xf_release,
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.set_params = lgh06xf_set_params,
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.get_frequency = lgh06xf_get_frequency,
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};
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struct dvb_frontend* lgh06xf_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c)
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{
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struct lgh06xf_priv *priv = NULL;
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priv = kzalloc(sizeof(struct lgh06xf_priv), GFP_KERNEL);
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if (priv == NULL)
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return NULL;
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priv->i2c = i2c;
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memcpy(&fe->ops.tuner_ops, &lgh06xf_tuner_ops,
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sizeof(struct dvb_tuner_ops));
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strlcpy(fe->ops.tuner_ops.info.name, dvb_pll_lg_tdvs_h06xf.name,
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sizeof(fe->ops.tuner_ops.info.name));
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fe->ops.tuner_ops.info.frequency_min = dvb_pll_lg_tdvs_h06xf.min;
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fe->ops.tuner_ops.info.frequency_max = dvb_pll_lg_tdvs_h06xf.max;
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fe->tuner_priv = priv;
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return fe;
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}
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EXPORT_SYMBOL(lgh06xf_attach);
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MODULE_DESCRIPTION("LG TDVS-H06xF ATSC Tuner support");
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MODULE_AUTHOR("Michael Krufky");
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MODULE_LICENSE("GPL");
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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