mantis_vp2040.c

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/*
    Mantis VP-2040 driver

    Copyright (C) Manu Abraham ([email protected])

    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/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>

#include "dmxdev.h"
#include "dvbdev.h"
#include "dvb_demux.h"
#include "dvb_frontend.h"
#include "dvb_net.h"

#include "tda1002x.h"
#include "mantis_common.h"
#include "mantis_ioc.h"
#include "mantis_dvb.h"
#include "mantis_vp2040.h"

#define MANTIS_MODEL_NAME   "VP-2040"
#define MANTIS_DEV_TYPE     "DVB-C"

struct tda1002x_config vp2040_tda1002x_cu1216_config = {
    .demod_address  = 0x18 >> 1,
    .invert     = 1,
};

struct tda10023_config vp2040_tda10023_cu1216_config = {
    .demod_address  = 0x18 >> 1,
    .invert     = 1,
};

static int tda1002x_cu1216_tuner_set(struct dvb_frontend *fe)
{
    struct dtv_frontend_properties *p = &fe->dtv_property_cache;
    struct mantis_pci *mantis   = fe->dvb->priv;
    struct i2c_adapter *adapter = &mantis->adapter;

    u8 buf[6];
    struct i2c_msg msg = {.addr = 0x60, .flags = 0, .buf = buf, .len = sizeof(buf)};
    int i;

#define CU1216_IF 36125000
#define TUNER_MUL 62500

    u32 div = (p->frequency + CU1216_IF + TUNER_MUL / 2) / TUNER_MUL;

    buf[0] = (div >> 8) & 0x7f;
    buf[1] = div & 0xff;
    buf[2] = 0xce;
    buf[3] = (p->frequency < 150000000 ? 0x01 :
          p->frequency < 445000000 ? 0x02 : 0x04);
    buf[4] = 0xde;
    buf[5] = 0x20;

    if (fe->ops.i2c_gate_ctrl)
        fe->ops.i2c_gate_ctrl(fe, 1);

    if (i2c_transfer(adapter, &msg, 1) != 1)
        return -EIO;

    /* wait for the pll lock */
    msg.flags = I2C_M_RD;
    msg.len = 1;
    for (i = 0; i < 20; i++) {
        if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);

        if (i2c_transfer(adapter, &msg, 1) == 1 && (buf[0] & 0x40))
            break;

        msleep(10);
    }

    /* switch the charge pump to the lower current */
    msg.flags = 0;
    msg.len = 2;
    msg.buf = &buf[2];
    buf[2] &= ~0x40;
    if (fe->ops.i2c_gate_ctrl)
        fe->ops.i2c_gate_ctrl(fe, 1);

    if (i2c_transfer(adapter, &msg, 1) != 1)
        return -EIO;

    return 0;
}

static u8 read_pwm(struct mantis_pci *mantis)
{
    struct i2c_adapter *adapter = &mantis->adapter;

    u8 b = 0xff;
    u8 pwm;
    struct i2c_msg msg[] = {
        {.addr = 0x50, .flags = 0, .buf = &b, .len = 1},
        {.addr = 0x50, .flags = I2C_M_RD, .buf = &pwm, .len = 1}
    };

    if ((i2c_transfer(adapter, msg, 2) != 2)
        || (pwm == 0xff))
        pwm = 0x48;

    return pwm;
}

static int vp2040_frontend_init(struct mantis_pci *mantis, struct dvb_frontend *fe)
{
    struct i2c_adapter *adapter = &mantis->adapter;

    int err = 0;

    err = mantis_frontend_power(mantis, POWER_ON);
    if (err == 0) {
        mantis_frontend_soft_reset(mantis);
        msleep(250);

        dprintk(MANTIS_ERROR, 1, "Probing for CU1216 (DVB-C)");
        fe = dvb_attach(tda10021_attach, &vp2040_tda1002x_cu1216_config,
                     adapter,
                     read_pwm(mantis));

        if (fe) {
            dprintk(MANTIS_ERROR, 1,
                "found Philips CU1216 DVB-C frontend (TDA10021) @ 0x%02x",
                vp2040_tda1002x_cu1216_config.demod_address);
        } else {
            fe = dvb_attach(tda10023_attach, &vp2040_tda10023_cu1216_config,
                         adapter,
                         read_pwm(mantis));

            if (fe) {
                dprintk(MANTIS_ERROR, 1,
                    "found Philips CU1216 DVB-C frontend (TDA10023) @ 0x%02x",
                    vp2040_tda1002x_cu1216_config.demod_address);
            }
        }

        if (fe) {
            fe->ops.tuner_ops.set_params = tda1002x_cu1216_tuner_set;
            dprintk(MANTIS_ERROR, 1, "Mantis DVB-C Philips CU1216 frontend attach success");
        } else {
            return -1;
        }
    } else {
        dprintk(MANTIS_ERROR, 1, "Frontend on <%s> POWER ON failed! <%d>",
            adapter->name,
            err);

        return -EIO;
    }
    mantis->fe = fe;
    dprintk(MANTIS_DEBUG, 1, "Done!");

    return 0;
}

struct mantis_hwconfig vp2040_config = {
    .model_name = MANTIS_MODEL_NAME,
    .dev_type   = MANTIS_DEV_TYPE,
    .ts_size    = MANTIS_TS_204,

    .baud_rate  = MANTIS_BAUD_9600,
    .parity     = MANTIS_PARITY_NONE,
    .bytes      = 0,

    .frontend_init  = vp2040_frontend_init,
    .power      = GPIF_A12,
    .reset      = GPIF_A13,
};