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digitv.c

/* DVB USB compliant linux driver for Nebula Electronics uDigiTV DVB-T USB2.0
 * receiver
 *
 * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@desy.de)
 *
 * partly based on the SDK published by Nebula Electronics
 *
 *    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, version 2.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include "digitv.h"

#include "mt352.h"
#include "nxt6000.h"

/* debug */
int dvb_usb_digitv_debug;
module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);

static int digitv_ctrl_msg(struct dvb_usb_device *d,
            u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
{
      int wo = (rbuf == NULL || rlen == 0); /* write-only */
      u8 sndbuf[7],rcvbuf[7];
      memset(sndbuf,0,7); memset(rcvbuf,0,7);

      sndbuf[0] = cmd;
      sndbuf[1] = vv;
      sndbuf[2] = wo ? wlen : rlen;

      if (wo) {
            memcpy(&sndbuf[3],wbuf,wlen);
            dvb_usb_generic_write(d,sndbuf,7);
      } else {
            dvb_usb_generic_rw(d,sndbuf,7,rcvbuf,7,10);
            memcpy(rbuf,&rcvbuf[3],rlen);
      }
      return 0;
}

/* I2C */
static int digitv_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
{
      struct dvb_usb_device *d = i2c_get_adapdata(adap);
      int i;

      if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
            return -EAGAIN;

      if (num > 2)
            warn("more than 2 i2c messages at a time is not handled yet. TODO.");

      for (i = 0; i < num; i++) {
            /* write/read request */
            if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
                  if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
                                    msg[i+1].buf,msg[i+1].len) < 0)
                        break;
                  i++;
            } else
                  if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
                                    &msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
                        break;
      }

      mutex_unlock(&d->i2c_mutex);
      return i;
}

static u32 digitv_i2c_func(struct i2c_adapter *adapter)
{
      return I2C_FUNC_I2C;
}

static struct i2c_algorithm digitv_i2c_algo = {
      .master_xfer   = digitv_i2c_xfer,
      .functionality = digitv_i2c_func,
};

/* Callbacks for DVB USB */
static int digitv_identify_state (struct usb_device *udev, struct
            dvb_usb_device_properties *props, struct dvb_usb_device_description **desc,
            int *cold)
{
      *cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
      return 0;
}

static int digitv_mt352_demod_init(struct dvb_frontend *fe)
{
      static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
      static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
                  0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
                  0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
                  0x75, 0x32 };
      int i;

      for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
            mt352_write(fe, &reset_buf[i], 2);

      msleep(1);

      for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
            mt352_write(fe, &init_buf[i], 2);

      return 0;
}

static struct mt352_config digitv_mt352_config = {
      .demod_init = digitv_mt352_demod_init,
};

static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *fep)
{
      struct dvb_usb_adapter *adap = fe->dvb->priv;
      u8 b[5];

      fe->ops.tuner_ops.calc_regs(fe, fep, b, sizeof(b));
      if (fe->ops.i2c_gate_ctrl)
            fe->ops.i2c_gate_ctrl(fe, 1);
      return digitv_ctrl_msg(adap->dev, USB_WRITE_TUNER, 0, &b[1], 4, NULL, 0);
}

static struct nxt6000_config digitv_nxt6000_config = {
      .clock_inversion = 1,
};

static int digitv_frontend_attach(struct dvb_usb_adapter *adap)
{
      struct digitv_state *st = adap->dev->priv;

      if ((adap->fe = dvb_attach(mt352_attach, &digitv_mt352_config, &adap->dev->i2c_adap)) != NULL) {
            st->is_nxt6000 = 0;
            return 0;
      }
      if ((adap->fe = dvb_attach(nxt6000_attach, &digitv_nxt6000_config, &adap->dev->i2c_adap)) != NULL) {
            st->is_nxt6000 = 1;
            return 0;
      }
      return -EIO;
}

static int digitv_tuner_attach(struct dvb_usb_adapter *adap)
{
      struct digitv_state *st = adap->dev->priv;

      if (!dvb_attach(dvb_pll_attach, adap->fe, 0x60, NULL, DVB_PLL_TDED4))
            return -ENODEV;

      if (st->is_nxt6000)
            adap->fe->ops.tuner_ops.set_params = digitv_nxt6000_tuner_set_params;

      return 0;
}

static struct dvb_usb_rc_key digitv_rc_keys[] = {
      { 0x5f, 0x55, KEY_0 },
      { 0x6f, 0x55, KEY_1 },
      { 0x9f, 0x55, KEY_2 },
      { 0xaf, 0x55, KEY_3 },
      { 0x5f, 0x56, KEY_4 },
      { 0x6f, 0x56, KEY_5 },
      { 0x9f, 0x56, KEY_6 },
      { 0xaf, 0x56, KEY_7 },
      { 0x5f, 0x59, KEY_8 },
      { 0x6f, 0x59, KEY_9 },
      { 0x9f, 0x59, KEY_TV },
      { 0xaf, 0x59, KEY_AUX },
      { 0x5f, 0x5a, KEY_DVD },
      { 0x6f, 0x5a, KEY_POWER },
      { 0x9f, 0x5a, KEY_MHP },     /* labelled 'Picture' */
      { 0xaf, 0x5a, KEY_AUDIO },
      { 0x5f, 0x65, KEY_INFO },
      { 0x6f, 0x65, KEY_F13 },     /* 16:9 */
      { 0x9f, 0x65, KEY_F14 },     /* 14:9 */
      { 0xaf, 0x65, KEY_EPG },
      { 0x5f, 0x66, KEY_EXIT },
      { 0x6f, 0x66, KEY_MENU },
      { 0x9f, 0x66, KEY_UP },
      { 0xaf, 0x66, KEY_DOWN },
      { 0x5f, 0x69, KEY_LEFT },
      { 0x6f, 0x69, KEY_RIGHT },
      { 0x9f, 0x69, KEY_ENTER },
      { 0xaf, 0x69, KEY_CHANNELUP },
      { 0x5f, 0x6a, KEY_CHANNELDOWN },
      { 0x6f, 0x6a, KEY_VOLUMEUP },
      { 0x9f, 0x6a, KEY_VOLUMEDOWN },
      { 0xaf, 0x6a, KEY_RED },
      { 0x5f, 0x95, KEY_GREEN },
      { 0x6f, 0x95, KEY_YELLOW },
      { 0x9f, 0x95, KEY_BLUE },
      { 0xaf, 0x95, KEY_SUBTITLE },
      { 0x5f, 0x96, KEY_F15 },     /* AD */
      { 0x6f, 0x96, KEY_TEXT },
      { 0x9f, 0x96, KEY_MUTE },
      { 0xaf, 0x96, KEY_REWIND },
      { 0x5f, 0x99, KEY_STOP },
      { 0x6f, 0x99, KEY_PLAY },
      { 0x9f, 0x99, KEY_FASTFORWARD },
      { 0xaf, 0x99, KEY_F16 },     /* chapter */
      { 0x5f, 0x9a, KEY_PAUSE },
      { 0x6f, 0x9a, KEY_PLAY },
      { 0x9f, 0x9a, KEY_RECORD },
      { 0xaf, 0x9a, KEY_F17 },     /* picture in picture */
      { 0x5f, 0xa5, KEY_KPPLUS },  /* zoom in */
      { 0x6f, 0xa5, KEY_KPMINUS }, /* zoom out */
      { 0x9f, 0xa5, KEY_F18 },     /* capture */
      { 0xaf, 0xa5, KEY_F19 },     /* web */
      { 0x5f, 0xa6, KEY_EMAIL },
      { 0x6f, 0xa6, KEY_PHONE },
      { 0x9f, 0xa6, KEY_PC },
};

static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
{
      int i;
      u8 key[5];
      u8 b[4] = { 0 };

      *event = 0;
      *state = REMOTE_NO_KEY_PRESSED;

      digitv_ctrl_msg(d,USB_READ_REMOTE,0,NULL,0,&key[1],4);

      /* Tell the device we've read the remote. Not sure how necessary
         this is, but the Nebula SDK does it. */
      digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);

      /* if something is inside the buffer, simulate key press */
      if (key[1] != 0)
      {
              for (i = 0; i < d->props.rc_key_map_size; i++) {
                  if (d->props.rc_key_map[i].custom == key[1] &&
                      d->props.rc_key_map[i].data == key[2]) {
                        *event = d->props.rc_key_map[i].event;
                        *state = REMOTE_KEY_PRESSED;
                        return 0;
                  }
            }
      }

      if (key[0] != 0)
            deb_rc("key: %x %x %x %x %x\n",key[0],key[1],key[2],key[3],key[4]);
      return 0;
}

/* DVB USB Driver stuff */
static struct dvb_usb_device_properties digitv_properties;

static int digitv_probe(struct usb_interface *intf,
            const struct usb_device_id *id)
{
      struct dvb_usb_device *d;
      int ret;
      if ((ret = dvb_usb_device_init(intf,&digitv_properties,THIS_MODULE,&d)) == 0) {
            u8 b[4] = { 0 };

            if (d != NULL) { /* do that only when the firmware is loaded */
                  b[0] = 1;
                  digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);

                  b[0] = 0;
                  digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
            }
      }
      return ret;
}

static struct usb_device_id digitv_table [] = {
            { USB_DEVICE(USB_VID_ANCHOR, USB_PID_NEBULA_DIGITV) },
            { }         /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, digitv_table);

static struct dvb_usb_device_properties digitv_properties = {
      .caps = DVB_USB_IS_AN_I2C_ADAPTER,

      .usb_ctrl = CYPRESS_FX2,
      .firmware = "dvb-usb-digitv-02.fw",

      .size_of_priv = sizeof(struct digitv_state),

      .num_adapters = 1,
      .adapter = {
            {
                  .frontend_attach  = digitv_frontend_attach,
                  .tuner_attach     = digitv_tuner_attach,

                  /* parameter for the MPEG2-data transfer */
                  .stream = {
                        .type = USB_BULK,
                        .count = 7,
                        .endpoint = 0x02,
                        .u = {
                              .bulk = {
                                    .buffersize = 4096,
                              }
                        }
                  },
            }
      },
      .identify_state   = digitv_identify_state,

      .rc_interval      = 1000,
      .rc_key_map       = digitv_rc_keys,
      .rc_key_map_size  = ARRAY_SIZE(digitv_rc_keys),
      .rc_query         = digitv_rc_query,

      .i2c_algo         = &digitv_i2c_algo,

      .generic_bulk_ctrl_endpoint = 0x01,

      .num_device_descs = 1,
      .devices = {
            {   "Nebula Electronics uDigiTV DVB-T USB2.0)",
                  { &digitv_table[0], NULL },
                  { NULL },
            },
            { NULL },
      }
};

static struct usb_driver digitv_driver = {
      .name       = "dvb_usb_digitv",
      .probe            = digitv_probe,
      .disconnect = dvb_usb_device_exit,
      .id_table   = digitv_table,
};

/* module stuff */
static int __init digitv_module_init(void)
{
      int result;
      if ((result = usb_register(&digitv_driver))) {
            err("usb_register failed. Error number %d",result);
            return result;
      }

      return 0;
}

static void __exit digitv_module_exit(void)
{
      /* deregister this driver from the USB subsystem */
      usb_deregister(&digitv_driver);
}

module_init (digitv_module_init);
module_exit (digitv_module_exit);

MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
MODULE_VERSION("1.0-alpha");
MODULE_LICENSE("GPL");

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