text: /*
   * TTUSB DVB driver
   *
   * Copyright (c) 2002 Holger Waechtler <holger@convergence.de>
   * Copyright (c) 2003 Felix Domke <tmbinc@elitedvb.net>
   *
   *	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.
   */
  #include <linux/init.h>
  #include <linux/slab.h>
  #include <linux/wait.h>
  #include <linux/fs.h>
  #include <linux/module.h>
  #include <linux/usb.h>
  #include <linux/delay.h>
  #include <linux/time.h>
  #include <linux/errno.h>
  #include <linux/jiffies.h>
  #include <linux/mutex.h>
  #include <linux/firmware.h>
  
  #include "dvb_frontend.h"
  #include "dmxdev.h"
  #include "dvb_demux.h"
  #include "dvb_net.h"
  #include "ves1820.h"
  #include "cx22700.h"
  #include "tda1004x.h"
  #include "stv0299.h"
  #include "tda8083.h"
  #include "stv0297.h"
  #include "lnbp21.h"
  
  #include <linux/dvb/frontend.h>
  #include <linux/dvb/dmx.h>
  #include <linux/pci.h>
  
  /*
    TTUSB_HWSECTIONS:
      the DSP supports filtering in hardware, however, since the "muxstream"
      is a bit braindead (no matching channel masks or no matching filter mask),
      we won't support this - yet. it doesn't event support negative filters,
      so the best way is maybe to keep TTUSB_HWSECTIONS undef'd and just
      parse TS data. USB bandwidth will be a problem when having large
      datastreams, especially for dvb-net, but hey, that's not my problem.
  
    TTUSB_DISEQC, TTUSB_TONE:
      let the STC do the diseqc/tone stuff. this isn't supported at least with
      my TTUSB, so let it undef'd unless you want to implement another
      frontend. never tested.
  
    debug:
      define it to > 3 for really hardcore debugging. you probably don't want
      this unless the device doesn't load at all. > 2 for bandwidth statistics.
  */
  
  static int debug;
  module_param(debug, int, 0644);
  MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  
  DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  
  #define dprintk(x...) do { if (debug) printk(KERN_DEBUG x); } while (0)
  
  #define ISO_BUF_COUNT      4
  #define FRAMES_PER_ISO_BUF 4
  #define ISO_FRAME_SIZE     912
  #define TTUSB_MAXCHANNEL   32
  #ifdef TTUSB_HWSECTIONS
  #define TTUSB_MAXFILTER    16	/* ??? */
  #endif
  
  #define TTUSB_REV_2_2	0x22
  #define TTUSB_BUDGET_NAME "ttusb_stc_fw"
  
  /**
   *  since we're casting (struct ttusb*) <-> (struct dvb_demux*) around
   *  the dvb_demux field must be the first in struct!!
   */
  struct ttusb {
  	struct dvb_demux dvb_demux;
  	struct dmxdev dmxdev;
  	struct dvb_net dvbnet;
  
  	/* and one for USB access. */
  	struct mutex semi2c;
  	struct mutex semusb;
  
  	struct dvb_adapter adapter;
  	struct usb_device *dev;
  
  	struct i2c_adapter i2c_adap;
  
  	int disconnecting;
  	int iso_streaming;
  
  	unsigned int bulk_out_pipe;
  	unsigned int bulk_in_pipe;
  	unsigned int isoc_in_pipe;
  
  	void *iso_buffer;
  	dma_addr_t iso_dma_handle;
  
  	struct urb *iso_urb[ISO_BUF_COUNT];
  
  	int running_feed_count;
  	int last_channel;
  	int last_filter;
  
  	u8 c;			/* transaction counter, wraps around...  */
  	enum fe_sec_tone_mode tone;
  	enum fe_sec_voltage voltage;
  
  	int mux_state;		// 0..2 - MuxSyncWord, 3 - nMuxPacks,    4 - muxpack
  	u8 mux_npacks;
  	u8 muxpack[256 + 8];
  	int muxpack_ptr, muxpack_len;
  
  	int insync;
  
  	int cc;			/* MuxCounter - will increment on EVERY MUX PACKET */
  	/* (including stuffing. yes. really.) */
  
  	u8 last_result[32];
  
  	int revision;
  
  	struct dvb_frontend* fe;
  };
  
  /* ugly workaround ... don't know why it's necessary to read */
  /* all result codes. */
  
  static int ttusb_cmd(struct ttusb *ttusb,
  	      const u8 * data, int len, int needresult)
  {
  	int actual_len;
  	int err;
  	int i;
  
  	if (debug >= 3) {
  		printk(KERN_DEBUG ">");
  		for (i = 0; i < len; ++i)
  			printk(KERN_CONT " %02x", data[i]);
  		printk(KERN_CONT "\n");
  	}
  
  	if (mutex_lock_interruptible(&ttusb->semusb) < 0)
  		return -EAGAIN;
  
  	err = usb_bulk_msg(ttusb->dev, ttusb->bulk_out_pipe,
  			   (u8 *) data, len, &actual_len, 1000);
  	if (err != 0) {
  		dprintk("%s: usb_bulk_msg(send) failed, err == %i!\n",
  			__func__, err);
  		mutex_unlock(&ttusb->semusb);
  		return err;
  	}
  	if (actual_len != len) {
  		dprintk("%s: only wrote %d of %d bytes\n", __func__,
  			actual_len, len);
  		mutex_unlock(&ttusb->semusb);
  		return -1;
  	}
  
  	err = usb_bulk_msg(ttusb->dev, ttusb->bulk_in_pipe,
  			   ttusb->last_result, 32, &actual_len, 1000);
  
  	if (err != 0) {
  		printk("%s: failed, receive error %d\n", __func__,
  		       err);
  		mutex_unlock(&ttusb->semusb);
  		return err;
  	}
  
  	if (debug >= 3) {
  		actual_len = ttusb->last_result[3] + 4;
  		printk(KERN_DEBUG "<");
  		for (i = 0; i < actual_len; ++i)
  			printk(KERN_CONT " %02x", ttusb->last_result[i]);
  		printk(KERN_CONT "\n");
  	}
  
  	if (!needresult)
  		mutex_unlock(&ttusb->semusb);
  	return 0;
  }
  
  static int ttusb_result(struct ttusb *ttusb, u8 * data, int len)
  {
  	memcpy(data, ttusb->last_result, len);
  	mutex_unlock(&ttusb->semusb);
  	return 0;
  }
  
  static int ttusb_i2c_msg(struct ttusb *ttusb,
  		  u8 addr, u8 * snd_buf, u8 snd_len, u8 * rcv_buf,
  		  u8 rcv_len)
  {
  	u8 b[0x28];
  	u8 id = ++ttusb->c;
  	int i, err;
  
  	if (snd_len > 0x28 - 7 || rcv_len > 0x20 - 7)
  		return -EINVAL;
  
  	b[0] = 0xaa;
  	b[1] = id;
  	b[2] = 0x31;
  	b[3] = snd_len + 3;
  	b[4] = addr << 1;
  	b[5] = snd_len;
  	b[6] = rcv_len;
  
  	for (i = 0; i < snd_len; i++)
  		b[7 + i] = snd_buf[i];
  
  	err = ttusb_cmd(ttusb, b, snd_len + 7, 1);
  
  	if (err)
  		return -EREMOTEIO;
  
  	err = ttusb_result(ttusb, b, 0x20);
  
  	/* check if the i2c transaction was successful */
  	if ((snd_len != b[5]) || (rcv_len != b[6])) return -EREMOTEIO;
  
  	if (rcv_len > 0) {
  
  		if (err || b[0] != 0x55 || b[1] != id) {
  			dprintk
  			    ("%s: usb_bulk_msg(recv) failed, err == %i, id == %02x, b == ",
  			     __func__, err, id);
  			return -EREMOTEIO;
  		}
  
  		for (i = 0; i < rcv_len; i++)
  			rcv_buf[i] = b[7 + i];
  	}
  
  	return rcv_len;
  }
  
  static int master_xfer(struct i2c_adapter* adapter, struct i2c_msg *msg, int num)
  {
  	struct ttusb *ttusb = i2c_get_adapdata(adapter);
  	int i = 0;
  	int inc;
  
  	if (mutex_lock_interruptible(&ttusb->semi2c) < 0)
  		return -EAGAIN;
  
  	while (i < num) {
  		u8 addr, snd_len, rcv_len, *snd_buf, *rcv_buf;
  		int err;
  
  		if (num > i + 1 && (msg[i + 1].flags & I2C_M_RD)) {
  			addr = msg[i].addr;
  			snd_buf = msg[i].buf;
  			snd_len = msg[i].len;
  			rcv_buf = msg[i + 1].buf;
  			rcv_len = msg[i + 1].len;
  			inc = 2;
  		} else {
  			addr = msg[i].addr;
  			snd_buf = msg[i].buf;
  			snd_len = msg[i].len;
  			rcv_buf = NULL;
  			rcv_len = 0;
  			inc = 1;
  		}
  
  		err = ttusb_i2c_msg(ttusb, addr,
  				    snd_buf, snd_len, rcv_buf, rcv_len);
  
  		if (err < rcv_len) {
  			dprintk("%s: i == %i\n", __func__, i);
  			break;
  		}
  
  		i += inc;
  	}
  
  	mutex_unlock(&ttusb->semi2c);
  	return i;
  }
  
  static int ttusb_boot_dsp(struct ttusb *ttusb)
  {
  	const struct firmware *fw;
  	int i, err;
  	u8 b[40];
  
  	err = request_firmware(&fw, "ttusb-budget/dspbootcode.bin",
  			       &ttusb->dev->dev);
  	if (err) {
  		printk(KERN_ERR "ttusb-budget: failed to request firmware\n");
  		return err;
  	}
  
  	/* BootBlock */
  	b[0] = 0xaa;
  	b[2] = 0x13;
  	b[3] = 28;
  
  	/* upload dsp code in 32 byte steps (36 didn't work for me ...) */
  	/* 32 is max packet size, no messages should be splitted. */
  	for (i = 0; i < fw->size; i += 28) {
  		memcpy(&b[4], &fw->data[i], 28);
  
  		b[1] = ++ttusb->c;
  
  		err = ttusb_cmd(ttusb, b, 32, 0);
  		if (err)
  			goto done;
  	}
  
  	/* last block ... */
  	b[1] = ++ttusb->c;
  	b[2] = 0x13;
  	b[3] = 0;
  
  	err = ttusb_cmd(ttusb, b, 4, 0);
  	if (err)
  		goto done;
  
  	/* BootEnd */
  	b[1] = ++ttusb->c;
  	b[2] = 0x14;
  	b[3] = 0;
  
  	err = ttusb_cmd(ttusb, b, 4, 0);
  
        done:
  	release_firmware(fw);
  	if (err) {
  		dprintk("%s: usb_bulk_msg() failed, return value %i!\n",
  			__func__, err);
  	}
  
  	return err;
  }
  
  static int ttusb_set_channel(struct ttusb *ttusb, int chan_id, int filter_type,
  		      int pid)
  {
  	int err;
  	/* SetChannel */
  	u8 b[] = { 0xaa, ++ttusb->c, 0x22, 4, chan_id, filter_type,
  		(pid >> 8) & 0xff, pid & 0xff
  	};
  
  	err = ttusb_cmd(ttusb, b, sizeof(b), 0);
  	return err;
  }
  
  static int ttusb_del_channel(struct ttusb *ttusb, int channel_id)
  {
  	int err;
  	/* DelChannel */
  	u8 b[] = { 0xaa, ++ttusb->c, 0x23, 1, channel_id };
  
  	err = ttusb_cmd(ttusb, b, sizeof(b), 0);
  	return err;
  }
  
  #ifdef TTUSB_HWSECTIONS
  static int ttusb_set_filter(struct ttusb *ttusb, int filter_id,
  		     int associated_chan, u8 filter[8], u8 mask[8])
  {
  	int err;
  	/* SetFilter */
  	u8 b[] = { 0xaa, 0, 0x24, 0x1a, filter_id, associated_chan,
  		filter[0], filter[1], filter[2], filter[3],
  		filter[4], filter[5], filter[6], filter[7],
  		filter[8], filter[9], filter[10], filter[11],
  		mask[0], mask[1], mask[2], mask[3],
  		mask[4], mask[5], mask[6], mask[7],
  		mask[8], mask[9], mask[10], mask[11]
  	};
  
  	err = ttusb_cmd(ttusb, b, sizeof(b), 0);
  	return err;
  }
  
  static int ttusb_del_filter(struct ttusb *ttusb, int filter_id)
  {
  	int err;
  	/* DelFilter */
  	u8 b[] = { 0xaa, ++ttusb->c, 0x25, 1, filter_id };
  
  	err = ttusb_cmd(ttusb, b, sizeof(b), 0);
  	return err;
  }
  #endif
  
  static int ttusb_init_controller(struct ttusb *ttusb)
  {
  	u8 b0[] = { 0xaa, ++ttusb->c, 0x15, 1, 0 };
  	u8 b1[] = { 0xaa, ++ttusb->c, 0x15, 1, 1 };
  	u8 b2[] = { 0xaa, ++ttusb->c, 0x32, 1, 0 };
  	/* i2c write read: 5 bytes, addr 0x10, 0x02 bytes write, 1 bytes read. */
  	u8 b3[] =
  	    { 0xaa, ++ttusb->c, 0x31, 5, 0x10, 0x02, 0x01, 0x00, 0x1e };
  	u8 b4[] =
  	    { 0x55, ttusb->c, 0x31, 4, 0x10, 0x02, 0x01, 0x00, 0x1e };
  
  	u8 get_version[] = { 0xaa, ++ttusb->c, 0x17, 5, 0, 0, 0, 0, 0 };
  	u8 get_dsp_version[0x20] =
  	    { 0xaa, ++ttusb->c, 0x26, 28, 0, 0, 0, 0, 0 };
  	int err;
  
  	/* reset board */
  	if ((err = ttusb_cmd(ttusb, b0, sizeof(b0), 0)))
  		return err;
  
  	/* reset board (again?) */
  	if ((err = ttusb_cmd(ttusb, b1, sizeof(b1), 0)))
  		return err;
  
  	ttusb_boot_dsp(ttusb);
  
  	/* set i2c bit rate */
  	if ((err = ttusb_cmd(ttusb, b2, sizeof(b2), 0)))
  		return err;
  
  	if ((err = ttusb_cmd(ttusb, b3, sizeof(b3), 1)))
  		return err;
  
  	err = ttusb_result(ttusb, b4, sizeof(b4));
  
  	if ((err = ttusb_cmd(ttusb, get_version, sizeof(get_version), 1)))
  		return err;
  
  	if ((err = ttusb_result(ttusb, get_version, sizeof(get_version))))
  		return err;
  
  	dprintk("%s: stc-version: %c%c%c%c%c\n", __func__,
  		get_version[4], get_version[5], get_version[6],
  		get_version[7], get_version[8]);
  
  	if (memcmp(get_version + 4, "V 0.0", 5) &&
  	    memcmp(get_version + 4, "V 1.1", 5) &&
  	    memcmp(get_version + 4, "V 2.1", 5) &&
  	    memcmp(get_version + 4, "V 2.2", 5)) {
  		printk
  		    ("%s: unknown STC version %c%c%c%c%c, please report!\n",
  		     __func__, get_version[4], get_version[5],
  		     get_version[6], get_version[7], get_version[8]);
  	}
  
  	ttusb->revision = ((get_version[6] - '0') << 4) |
  			   (get_version[8] - '0');
  
  	err =
  	    ttusb_cmd(ttusb, get_dsp_version, sizeof(get_dsp_version), 1);
  	if (err)
  		return err;
  
  	err =
  	    ttusb_result(ttusb, get_dsp_version, sizeof(get_dsp_version));
  	if (err)
  		return err;
  	printk("%s: dsp-version: %c%c%c\n", __func__,
  	       get_dsp_version[4], get_dsp_version[5], get_dsp_version[6]);
  	return 0;
  }
  
  #ifdef TTUSB_DISEQC
  static int ttusb_send_diseqc(struct dvb_frontend* fe,
  			     const struct dvb_diseqc_master_cmd *cmd)
  {
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	u8 b[12] = { 0xaa, ++ttusb->c, 0x18 };
  
  	int err;
  
  	b[3] = 4 + 2 + cmd->msg_len;
  	b[4] = 0xFF;		/* send diseqc master, not burst */
  	b[5] = cmd->msg_len;
  
  	memcpy(b + 5, cmd->msg, cmd->msg_len);
  
  	/* Diseqc */
  	if ((err = ttusb_cmd(ttusb, b, 4 + b[3], 0))) {
  		dprintk("%s: usb_bulk_msg() failed, return value %i!\n",
  			__func__, err);
  	}
  
  	return err;
  }
  #endif
  
  static int ttusb_update_lnb(struct ttusb *ttusb)
  {
  	u8 b[] = { 0xaa, ++ttusb->c, 0x16, 5, /*power: */ 1,
  		ttusb->voltage == SEC_VOLTAGE_18 ? 0 : 1,
  		ttusb->tone == SEC_TONE_ON ? 1 : 0, 1, 1
  	};
  	int err;
  
  	/* SetLNB */
  	if ((err = ttusb_cmd(ttusb, b, sizeof(b), 0))) {
  		dprintk("%s: usb_bulk_msg() failed, return value %i!\n",
  			__func__, err);
  	}
  
  	return err;
  }
  
  static int ttusb_set_voltage(struct dvb_frontend *fe,
  			     enum fe_sec_voltage voltage)
  {
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  
  	ttusb->voltage = voltage;
  	return ttusb_update_lnb(ttusb);
  }
  
  #ifdef TTUSB_TONE
  static int ttusb_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone)
  {
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  
  	ttusb->tone = tone;
  	return ttusb_update_lnb(ttusb);
  }
  #endif
  
  
  #if 0
  static void ttusb_set_led_freq(struct ttusb *ttusb, u8 freq)
  {
  	u8 b[] = { 0xaa, ++ttusb->c, 0x19, 1, freq };
  	int err, actual_len;
  
  	err = ttusb_cmd(ttusb, b, sizeof(b), 0);
  	if (err) {
  		dprintk("%s: usb_bulk_msg() failed, return value %i!\n",
  			__func__, err);
  	}
  }
  #endif
  
  /*****************************************************************************/
  
  #ifdef TTUSB_HWSECTIONS
  static void ttusb_handle_ts_data(struct ttusb_channel *channel,
  				 const u8 * data, int len);
  static void ttusb_handle_sec_data(struct ttusb_channel *channel,
  				  const u8 * data, int len);
  #endif
  
  static int numpkt, numts, numstuff, numsec, numinvalid;
  static unsigned long lastj;
  
  static void ttusb_process_muxpack(struct ttusb *ttusb, const u8 * muxpack,
  			   int len)
  {
  	u16 csum = 0, cc;
  	int i;
  
  	if (len < 4 || len & 0x1) {
  		pr_warn("%s: muxpack has invalid len %d\n", __func__, len);
  		numinvalid++;
  		return;
  	}
  
  	for (i = 0; i < len; i += 2)
  		csum ^= le16_to_cpup((__le16 *) (muxpack + i));
  	if (csum) {
  		printk("%s: muxpack with incorrect checksum, ignoring\n",
  		       __func__);
  		numinvalid++;
  		return;
  	}
  
  	cc = (muxpack[len - 4] << 8) | muxpack[len - 3];
  	cc &= 0x7FFF;
  	if ((cc != ttusb->cc) && (ttusb->cc != -1))
  		printk("%s: cc discontinuity (%d frames missing)\n",
  		       __func__, (cc - ttusb->cc) & 0x7FFF);
  	ttusb->cc = (cc + 1) & 0x7FFF;
  	if (muxpack[0] & 0x80) {
  #ifdef TTUSB_HWSECTIONS
  		/* section data */
  		int pusi = muxpack[0] & 0x40;
  		int channel = muxpack[0] & 0x1F;
  		int payload = muxpack[1];
  		const u8 *data = muxpack + 2;
  		/* check offset flag */
  		if (muxpack[0] & 0x20)
  			data++;
  
  		ttusb_handle_sec_data(ttusb->channel + channel, data,
  				      payload);
  		data += payload;
  
  		if ((!!(ttusb->muxpack[0] & 0x20)) ^
  		    !!(ttusb->muxpack[1] & 1))
  			data++;
  #warning TODO: pusi
  		printk("cc: %04x\n", (data[0] << 8) | data[1]);
  #endif
  		numsec++;
  	} else if (muxpack[0] == 0x47) {
  #ifdef TTUSB_HWSECTIONS
  		/* we have TS data here! */
  		int pid = ((muxpack[1] & 0x0F) << 8) | muxpack[2];
  		int channel;
  		for (channel = 0; channel < TTUSB_MAXCHANNEL; ++channel)
  			if (ttusb->channel[channel].active
  			    && (pid == ttusb->channel[channel].pid))
  				ttusb_handle_ts_data(ttusb->channel +
  						     channel, muxpack,
  						     188);
  #endif
  		numts++;
  		dvb_dmx_swfilter_packets(&ttusb->dvb_demux, muxpack, 1);
  	} else if (muxpack[0] != 0) {
  		numinvalid++;
  		printk("illegal muxpack type %02x\n", muxpack[0]);
  	} else
  		numstuff++;
  }
  
  static void ttusb_process_frame(struct ttusb *ttusb, u8 * data, int len)
  {
  	int maxwork = 1024;
  	while (len) {
  		if (!(maxwork--)) {
  			printk("%s: too much work\n", __func__);
  			break;
  		}
  
  		switch (ttusb->mux_state) {
  		case 0:
  		case 1:
  		case 2:
  			len--;
  			if (*data++ == 0xAA)
  				++ttusb->mux_state;
  			else {
  				ttusb->mux_state = 0;
  				if (ttusb->insync) {
  					dprintk("%s: %02x\n",
  						__func__, data[-1]);
  					printk(KERN_INFO "%s: lost sync.\n",
  					       __func__);
  					ttusb->insync = 0;
  				}
  			}
  			break;
  		case 3:
  			ttusb->insync = 1;
  			len--;
  			ttusb->mux_npacks = *data++;
  			++ttusb->mux_state;
  			ttusb->muxpack_ptr = 0;
  			/* maximum bytes, until we know the length */
  			ttusb->muxpack_len = 2;
  			break;
  		case 4:
  			{
  				int avail;
  				avail = len;
  				if (avail >
  				    (ttusb->muxpack_len -
  				     ttusb->muxpack_ptr))
  					avail =
  					    ttusb->muxpack_len -
  					    ttusb->muxpack_ptr;
  				memcpy(ttusb->muxpack + ttusb->muxpack_ptr,
  				       data, avail);
  				ttusb->muxpack_ptr += avail;
  				BUG_ON(ttusb->muxpack_ptr > 264);
  				data += avail;
  				len -= avail;
  				/* determine length */
  				if (ttusb->muxpack_ptr == 2) {
  					if (ttusb->muxpack[0] & 0x80) {
  						ttusb->muxpack_len =
  						    ttusb->muxpack[1] + 2;
  						if (ttusb->
  						    muxpack[0] & 0x20)
  							ttusb->
  							    muxpack_len++;
  						if ((!!
  						     (ttusb->
  						      muxpack[0] & 0x20)) ^
  						    !!(ttusb->
  						       muxpack[1] & 1))
  							ttusb->
  							    muxpack_len++;
  						ttusb->muxpack_len += 4;
  					} else if (ttusb->muxpack[0] ==
  						   0x47)
  						ttusb->muxpack_len =
  						    188 + 4;
  					else if (ttusb->muxpack[0] == 0x00)
  						ttusb->muxpack_len =
  						    ttusb->muxpack[1] + 2 +
  						    4;
  					else {
  						dprintk
  						    ("%s: invalid state: first byte is %x\n",
  						     __func__,
  						     ttusb->muxpack[0]);
  						ttusb->mux_state = 0;
  					}
  				}
  
  			/**
  			 * if length is valid and we reached the end:
  			 * goto next muxpack
  			 */
  				if ((ttusb->muxpack_ptr >= 2) &&
  				    (ttusb->muxpack_ptr ==
  				     ttusb->muxpack_len)) {
  					ttusb_process_muxpack(ttusb,
  							      ttusb->
  							      muxpack,
  							      ttusb->
  							      muxpack_ptr);
  					ttusb->muxpack_ptr = 0;
  					/* maximum bytes, until we know the length */
  					ttusb->muxpack_len = 2;
  
  				/**
  				 * no muxpacks left?
  				 * return to search-sync state
  				 */
  					if (!ttusb->mux_npacks--) {
  						ttusb->mux_state = 0;
  						break;
  					}
  				}
  				break;
  			}
  		default:
  			BUG();
  			break;
  		}
  	}
  }
  
  static void ttusb_iso_irq(struct urb *urb)
  {
  	struct ttusb *ttusb = urb->context;
  	struct usb_iso_packet_descriptor *d;
  	u8 *data;
  	int len, i;
  
  	if (!ttusb->iso_streaming)
  		return;
  
  #if 0
  	printk("%s: status %d, errcount == %d, length == %i\n",
  	       __func__,
  	       urb->status, urb->error_count, urb->actual_length);
  #endif
  
  	if (!urb->status) {
  		for (i = 0; i < urb->number_of_packets; ++i) {
  			numpkt++;
  			if (time_after_eq(jiffies, lastj + HZ)) {
  				dprintk("frames/s: %lu (ts: %d, stuff %d, "
  					"sec: %d, invalid: %d, all: %d)\n",
  					numpkt * HZ / (jiffies - lastj),
  					numts, numstuff, numsec, numinvalid,
  					numts + numstuff + numsec + numinvalid);
  				numts = numstuff = numsec = numinvalid = 0;
  				lastj = jiffies;
  				numpkt = 0;
  			}
  			d = &urb->iso_frame_desc[i];
  			data = urb->transfer_buffer + d->offset;
  			len = d->actual_length;
  			d->actual_length = 0;
  			d->status = 0;
  			ttusb_process_frame(ttusb, data, len);
  		}
  	}
  	usb_submit_urb(urb, GFP_ATOMIC);
  }
  
  static void ttusb_free_iso_urbs(struct ttusb *ttusb)
  {
  	int i;
  
  	for (i = 0; i < ISO_BUF_COUNT; i++)
  		usb_free_urb(ttusb->iso_urb[i]);
  
  	pci_free_consistent(NULL,
  			    ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF *
  			    ISO_BUF_COUNT, ttusb->iso_buffer,
  			    ttusb->iso_dma_handle);
  }
  
  static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
  {
  	int i;
  
  	ttusb->iso_buffer = pci_zalloc_consistent(NULL,
  						  ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
  						  &ttusb->iso_dma_handle);
  
  	if (!ttusb->iso_buffer) {
  		dprintk("%s: pci_alloc_consistent - not enough memory\n",
  			__func__);
  		return -ENOMEM;
  	}
  
  	for (i = 0; i < ISO_BUF_COUNT; i++) {
  		struct urb *urb;
  
  		if (!
  		    (urb =
  		     usb_alloc_urb(FRAMES_PER_ISO_BUF, GFP_ATOMIC))) {
  			ttusb_free_iso_urbs(ttusb);
  			return -ENOMEM;
  		}
  
  		ttusb->iso_urb[i] = urb;
  	}
  
  	return 0;
  }
  
  static void ttusb_stop_iso_xfer(struct ttusb *ttusb)
  {
  	int i;
  
  	for (i = 0; i < ISO_BUF_COUNT; i++)
  		usb_kill_urb(ttusb->iso_urb[i]);
  
  	ttusb->iso_streaming = 0;
  }
  
  static int ttusb_start_iso_xfer(struct ttusb *ttusb)
  {
  	int i, j, err, buffer_offset = 0;
  
  	if (ttusb->iso_streaming) {
  		printk("%s: iso xfer already running!\n", __func__);
  		return 0;
  	}
  
  	ttusb->cc = -1;
  	ttusb->insync = 0;
  	ttusb->mux_state = 0;
  
  	for (i = 0; i < ISO_BUF_COUNT; i++) {
  		int frame_offset = 0;
  		struct urb *urb = ttusb->iso_urb[i];
  
  		urb->dev = ttusb->dev;
  		urb->context = ttusb;
  		urb->complete = ttusb_iso_irq;
  		urb->pipe = ttusb->isoc_in_pipe;
  		urb->transfer_flags = URB_ISO_ASAP;
  		urb->interval = 1;
  		urb->number_of_packets = FRAMES_PER_ISO_BUF;
  		urb->transfer_buffer_length =
  		    ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF;
  		urb->transfer_buffer = ttusb->iso_buffer + buffer_offset;
  		buffer_offset += ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF;
  
  		for (j = 0; j < FRAMES_PER_ISO_BUF; j++) {
  			urb->iso_frame_desc[j].offset = frame_offset;
  			urb->iso_frame_desc[j].length = ISO_FRAME_SIZE;
  			frame_offset += ISO_FRAME_SIZE;
  		}
  	}
  
  	for (i = 0; i < ISO_BUF_COUNT; i++) {
  		if ((err = usb_submit_urb(ttusb->iso_urb[i], GFP_ATOMIC))) {
  			ttusb_stop_iso_xfer(ttusb);
  			printk
  			    ("%s: failed urb submission (%i: err = %i)!\n",
  			     __func__, i, err);
  			return err;
  		}
  	}
  
  	ttusb->iso_streaming = 1;
  
  	return 0;
  }
  
  #ifdef TTUSB_HWSECTIONS
  static void ttusb_handle_ts_data(struct dvb_demux_feed *dvbdmxfeed, const u8 * data,
  			  int len)
  {
  	dvbdmxfeed->cb.ts(data, len, 0, 0, &dvbdmxfeed->feed.ts, 0);
  }
  
  static void ttusb_handle_sec_data(struct dvb_demux_feed *dvbdmxfeed, const u8 * data,
  			   int len)
  {
  //      struct dvb_demux_feed *dvbdmxfeed = channel->dvbdmxfeed;
  #error TODO: handle ugly stuff
  //      dvbdmxfeed->cb.sec(data, len, 0, 0, &dvbdmxfeed->feed.sec, 0);
  }
  #endif
  
  static int ttusb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
  {
  	struct ttusb *ttusb = (struct ttusb *) dvbdmxfeed->demux;
  	int feed_type = 1;
  
  	dprintk("ttusb_start_feed\n");
  
  	switch (dvbdmxfeed->type) {
  	case DMX_TYPE_TS:
  		break;
  	case DMX_TYPE_SEC:
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	if (dvbdmxfeed->type == DMX_TYPE_TS) {
  		switch (dvbdmxfeed->pes_type) {
  		case DMX_PES_VIDEO:
  		case DMX_PES_AUDIO:
  		case DMX_PES_TELETEXT:
  		case DMX_PES_PCR:
  		case DMX_PES_OTHER:
  			break;
  		default:
  			return -EINVAL;
  		}
  	}
  
  #ifdef TTUSB_HWSECTIONS
  #error TODO: allocate filters
  	if (dvbdmxfeed->type == DMX_TYPE_TS) {
  		feed_type = 1;
  	} else if (dvbdmxfeed->type == DMX_TYPE_SEC) {
  		feed_type = 2;
  	}
  #endif
  
  	ttusb_set_channel(ttusb, dvbdmxfeed->index, feed_type, dvbdmxfeed->pid);
  
  	if (0 == ttusb->running_feed_count++)
  		ttusb_start_iso_xfer(ttusb);
  
  	return 0;
  }
  
  static int ttusb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
  {
  	struct ttusb *ttusb = (struct ttusb *) dvbdmxfeed->demux;
  
  	ttusb_del_channel(ttusb, dvbdmxfeed->index);
  
  	if (--ttusb->running_feed_count == 0)
  		ttusb_stop_iso_xfer(ttusb);
  
  	return 0;
  }
  
  static int ttusb_setup_interfaces(struct ttusb *ttusb)
  {
  	usb_set_interface(ttusb->dev, 1, 1);
  
  	ttusb->bulk_out_pipe = usb_sndbulkpipe(ttusb->dev, 1);
  	ttusb->bulk_in_pipe = usb_rcvbulkpipe(ttusb->dev, 1);
  	ttusb->isoc_in_pipe = usb_rcvisocpipe(ttusb->dev, 2);
  
  	return 0;
  }
  
  #if 0
  static u8 stc_firmware[8192];
  
  static int stc_open(struct inode *inode, struct file *file)
  {
  	struct ttusb *ttusb = file->private_data;
  	int addr;
  
  	for (addr = 0; addr < 8192; addr += 16) {
  		u8 snd_buf[2] = { addr >> 8, addr & 0xFF };
  		ttusb_i2c_msg(ttusb, 0x50, snd_buf, 2, stc_firmware + addr,
  			      16);
  	}
  
  	return 0;
  }
  
  static ssize_t stc_read(struct file *file, char *buf, size_t count,
  		 loff_t *offset)
  {
  	return simple_read_from_buffer(buf, count, offset, stc_firmware, 8192);
  }
  
  static int stc_release(struct inode *inode, struct file *file)
  {
  	return 0;
  }
  
  static const struct file_operations stc_fops = {
  	.owner = THIS_MODULE,
  	.read = stc_read,
  	.open = stc_open,
  	.release = stc_release,
  };
  #endif
  
  static u32 functionality(struct i2c_adapter *adapter)
  {
  	return I2C_FUNC_I2C;
  }
  
  
  
  static int alps_tdmb7_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	u8 data[4];
  	struct i2c_msg msg = {.addr=0x61, .flags=0, .buf=data, .len=sizeof(data) };
  	u32 div;
  
  	div = (p->frequency + 36166667) / 166667;
  
  	data[0] = (div >> 8) & 0x7f;
  	data[1] = div & 0xff;
  	data[2] = ((div >> 10) & 0x60) | 0x85;
  	data[3] = p->frequency < 592000000 ? 0x40 : 0x80;
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &msg, 1) != 1) return -EIO;
  	return 0;
  }
  
  static struct cx22700_config alps_tdmb7_config = {
  	.demod_address = 0x43,
  };
  
  
  
  
  
  static int philips_tdm1316l_tuner_init(struct dvb_frontend* fe)
  {
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	static u8 td1316_init[] = { 0x0b, 0xf5, 0x85, 0xab };
  	static u8 disable_mc44BC374c[] = { 0x1d, 0x74, 0xa0, 0x68 };
  	struct i2c_msg tuner_msg = { .addr=0x60, .flags=0, .buf=td1316_init, .len=sizeof(td1316_init) };
  
  	// setup PLL configuration
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1) != 1) return -EIO;
  	msleep(1);
  
  	// disable the mc44BC374c (do not check for errors)
  	tuner_msg.addr = 0x65;
  	tuner_msg.buf = disable_mc44BC374c;
  	tuner_msg.len = sizeof(disable_mc44BC374c);
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1) != 1) {
  		i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1);
  	}
  
  	return 0;
  }
  
  static int philips_tdm1316l_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	u8 tuner_buf[4];
  	struct i2c_msg tuner_msg = {.addr=0x60, .flags=0, .buf=tuner_buf, .len=sizeof(tuner_buf) };
  	int tuner_frequency = 0;
  	u8 band, cp, filter;
  
  	// determine charge pump
  	tuner_frequency = p->frequency + 36130000;
  	if (tuner_frequency < 87000000) return -EINVAL;
  	else if (tuner_frequency < 130000000) cp = 3;
  	else if (tuner_frequency < 160000000) cp = 5;
  	else if (tuner_frequency < 200000000) cp = 6;
  	else if (tuner_frequency < 290000000) cp = 3;
  	else if (tuner_frequency < 420000000) cp = 5;
  	else if (tuner_frequency < 480000000) cp = 6;
  	else if (tuner_frequency < 620000000) cp = 3;
  	else if (tuner_frequency < 830000000) cp = 5;
  	else if (tuner_frequency < 895000000) cp = 7;
  	else return -EINVAL;
  
  	// determine band
  	if (p->frequency < 49000000)
  		return -EINVAL;
  	else if (p->frequency < 159000000)
  		band = 1;
  	else if (p->frequency < 444000000)
  		band = 2;
  	else if (p->frequency < 861000000)
  		band = 4;
  	else return -EINVAL;
  
  	// setup PLL filter
  	switch (p->bandwidth_hz) {
  	case 6000000:
  		tda1004x_writereg(fe, 0x0C, 0);
  		filter = 0;
  		break;
  
  	case 7000000:
  		tda1004x_writereg(fe, 0x0C, 0);
  		filter = 0;
  		break;
  
  	case 8000000:
  		tda1004x_writereg(fe, 0x0C, 0xFF);
  		filter = 1;
  		break;
  
  	default:
  		return -EINVAL;
  	}
  
  	// calculate divisor
  	// ((36130000+((1000000/6)/2)) + Finput)/(1000000/6)
  	tuner_frequency = (((p->frequency / 1000) * 6) + 217280) / 1000;
  
  	// setup tuner buffer
  	tuner_buf[0] = tuner_frequency >> 8;
  	tuner_buf[1] = tuner_frequency & 0xff;
  	tuner_buf[2] = 0xca;
  	tuner_buf[3] = (cp << 5) | (filter << 3) | band;
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1) != 1)
  		return -EIO;
  
  	msleep(1);
  	return 0;
  }
  
  static int philips_tdm1316l_request_firmware(struct dvb_frontend* fe, const struct firmware **fw, char* name)
  {
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  
  	return request_firmware(fw, name, &ttusb->dev->dev);
  }
  
  static struct tda1004x_config philips_tdm1316l_config = {
  
  	.demod_address = 0x8,
  	.invert = 1,
  	.invert_oclk = 0,
  	.request_firmware = philips_tdm1316l_request_firmware,
  };
  
  static u8 alps_bsbe1_inittab[] = {
  	0x01, 0x15,
  	0x02, 0x30,
  	0x03, 0x00,
  	0x04, 0x7d,             /* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  	0x05, 0x35,             /* I2CT = 0, SCLT = 1, SDAT = 1 */
  	0x06, 0x40,             /* DAC not used, set to high impendance mode */
  	0x07, 0x00,             /* DAC LSB */
  	0x08, 0x40,             /* DiSEqC off, LNB power on OP2/LOCK pin on */
  	0x09, 0x00,             /* FIFO */
  	0x0c, 0x51,             /* OP1 ctl = Normal, OP1 val = 1 (LNB Power ON) */
  	0x0d, 0x82,             /* DC offset compensation = ON, beta_agc1 = 2 */
  	0x0e, 0x23,             /* alpha_tmg = 2, beta_tmg = 3 */
  	0x10, 0x3f,             // AGC2  0x3d
  	0x11, 0x84,
  	0x12, 0xb9,
  	0x15, 0xc9,             // lock detector threshold
  	0x16, 0x00,
  	0x17, 0x00,
  	0x18, 0x00,
  	0x19, 0x00,
  	0x1a, 0x00,
  	0x1f, 0x50,
  	0x20, 0x00,
  	0x21, 0x00,
  	0x22, 0x00,
  	0x23, 0x00,
  	0x28, 0x00,             // out imp: normal  out type: parallel FEC mode:0
  	0x29, 0x1e,             // 1/2 threshold
  	0x2a, 0x14,             // 2/3 threshold
  	0x2b, 0x0f,             // 3/4 threshold
  	0x2c, 0x09,             // 5/6 threshold
  	0x2d, 0x05,             // 7/8 threshold
  	0x2e, 0x01,
  	0x31, 0x1f,             // test all FECs
  	0x32, 0x19,             // viterbi and synchro search
  	0x33, 0xfc,             // rs control
  	0x34, 0x93,             // error control
  	0x0f, 0x92,
  	0xff, 0xff
  };
  
  static u8 alps_bsru6_inittab[] = {
  	0x01, 0x15,
  	0x02, 0x30,
  	0x03, 0x00,
  	0x04, 0x7d,		/* F22FR = 0x7d, F22 = f_VCO / 128 / 0x7d = 22 kHz */
  	0x05, 0x35,		/* I2CT = 0, SCLT = 1, SDAT = 1 */
  	0x06, 0x40,		/* DAC not used, set to high impendance mode */
  	0x07, 0x00,		/* DAC LSB */
  	0x08, 0x40,		/* DiSEqC off, LNB power on OP2/LOCK pin on */
  	0x09, 0x00,		/* FIFO */
  	0x0c, 0x51,		/* OP1 ctl = Normal, OP1 val = 1 (LNB Power ON) */
  	0x0d, 0x82,		/* DC offset compensation = ON, beta_agc1 = 2 */
  	0x0e, 0x23,		/* alpha_tmg = 2, beta_tmg = 3 */
  	0x10, 0x3f,		// AGC2  0x3d
  	0x11, 0x84,
  	0x12, 0xb9,
  	0x15, 0xc9,		// lock detector threshold
  	0x16, 0x00,
  	0x17, 0x00,
  	0x18, 0x00,
  	0x19, 0x00,
  	0x1a, 0x00,
  	0x1f, 0x50,
  	0x20, 0x00,
  	0x21, 0x00,
  	0x22, 0x00,
  	0x23, 0x00,
  	0x28, 0x00,		// out imp: normal  out type: parallel FEC mode:0
  	0x29, 0x1e,		// 1/2 threshold
  	0x2a, 0x14,		// 2/3 threshold
  	0x2b, 0x0f,		// 3/4 threshold
  	0x2c, 0x09,		// 5/6 threshold
  	0x2d, 0x05,		// 7/8 threshold
  	0x2e, 0x01,
  	0x31, 0x1f,		// test all FECs
  	0x32, 0x19,		// viterbi and synchro search
  	0x33, 0xfc,		// rs control
  	0x34, 0x93,		// error control
  	0x0f, 0x52,
  	0xff, 0xff
  };
  
  static int alps_stv0299_set_symbol_rate(struct dvb_frontend *fe, u32 srate, u32 ratio)
  {
  	u8 aclk = 0;
  	u8 bclk = 0;
  
  	if (srate < 1500000) {
  		aclk = 0xb7;
  		bclk = 0x47;
  	} else if (srate < 3000000) {
  		aclk = 0xb7;
  		bclk = 0x4b;
  	} else if (srate < 7000000) {
  		aclk = 0xb7;
  		bclk = 0x4f;
  	} else if (srate < 14000000) {
  		aclk = 0xb7;
  		bclk = 0x53;
  	} else if (srate < 30000000) {
  		aclk = 0xb6;
  		bclk = 0x53;
  	} else if (srate < 45000000) {
  		aclk = 0xb4;
  		bclk = 0x51;
  	}
  
  	stv0299_writereg(fe, 0x13, aclk);
  	stv0299_writereg(fe, 0x14, bclk);
  	stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
  	stv0299_writereg(fe, 0x20, (ratio >> 8) & 0xff);
  	stv0299_writereg(fe, 0x21, (ratio) & 0xf0);
  
  	return 0;
  }
  
  static int philips_tsa5059_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	u8 buf[4];
  	u32 div;
  	struct i2c_msg msg = {.addr = 0x61,.flags = 0,.buf = buf,.len = sizeof(buf) };
  
  	if ((p->frequency < 950000) || (p->frequency > 2150000))
  		return -EINVAL;
  
  	div = (p->frequency + (125 - 1)) / 125;	/* round correctly */
  	buf[0] = (div >> 8) & 0x7f;
  	buf[1] = div & 0xff;
  	buf[2] = 0x80 | ((div & 0x18000) >> 10) | 4;
  	buf[3] = 0xC4;
  
  	if (p->frequency > 1530000)
  		buf[3] = 0xC0;
  
  	/* BSBE1 wants XCE bit set */
  	if (ttusb->revision == TTUSB_REV_2_2)
  		buf[3] |= 0x20;
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &msg, 1) != 1)
  		return -EIO;
  
  	return 0;
  }
  
  static struct stv0299_config alps_stv0299_config = {
  	.demod_address = 0x68,
  	.inittab = alps_bsru6_inittab,
  	.mclk = 88000000UL,
  	.invert = 1,
  	.skip_reinit = 0,
  	.lock_output = STV0299_LOCKOUTPUT_1,
  	.volt13_op0_op1 = STV0299_VOLT13_OP1,
  	.min_delay_ms = 100,
  	.set_symbol_rate = alps_stv0299_set_symbol_rate,
  };
  
  static int ttusb_novas_grundig_29504_491_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb* ttusb = (struct ttusb*) fe->dvb->priv;
  	u8 buf[4];
  	u32 div;
  	struct i2c_msg msg = {.addr = 0x61,.flags = 0,.buf = buf,.len = sizeof(buf) };
  
  	div = p->frequency / 125;
  
  	buf[0] = (div >> 8) & 0x7f;
  	buf[1] = div & 0xff;
  	buf[2] = 0x8e;
  	buf[3] = 0x00;
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &msg, 1) != 1)
  		return -EIO;
  
  	return 0;
  }
  
  static struct tda8083_config ttusb_novas_grundig_29504_491_config = {
  
  	.demod_address = 0x68,
  };
  
  static int alps_tdbe2_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb* ttusb = fe->dvb->priv;
  	u32 div;
  	u8 data[4];
  	struct i2c_msg msg = { .addr = 0x62, .flags = 0, .buf = data, .len = sizeof(data) };
  
  	div = (p->frequency + 35937500 + 31250) / 62500;
  
  	data[0] = (div >> 8) & 0x7f;
  	data[1] = div & 0xff;
  	data[2] = 0x85 | ((div >> 10) & 0x60);
  	data[3] = (p->frequency < 174000000 ? 0x88 : p->frequency < 470000000 ? 0x84 : 0x81);
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer (&ttusb->i2c_adap, &msg, 1) != 1)
  		return -EIO;
  
  	return 0;
  }
  
  
  static struct ves1820_config alps_tdbe2_config = {
  	.demod_address = 0x09,
  	.xin = 57840000UL,
  	.invert = 1,
  	.selagc = VES1820_SELAGC_SIGNAMPERR,
  };
  
  static u8 read_pwm(struct ttusb* ttusb)
  {
  	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(&ttusb->i2c_adap, msg, 2) != 2) || (pwm == 0xff))
  		pwm = 0x48;
  
  	return pwm;
  }
  
  
  static int dvbc_philips_tdm1316l_tuner_set_params(struct dvb_frontend *fe)
  {
  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
  	struct ttusb *ttusb = (struct ttusb *) fe->dvb->priv;
  	u8 tuner_buf[5];
  	struct i2c_msg tuner_msg = {.addr = 0x60,
  				    .flags = 0,
  				    .buf = tuner_buf,
  				    .len = sizeof(tuner_buf) };
  	int tuner_frequency = 0;
  	u8 band, cp, filter;
  
  	// determine charge pump
  	tuner_frequency = p->frequency;
  	if      (tuner_frequency <  87000000) {return -EINVAL;}
  	else if (tuner_frequency < 130000000) {cp = 3; band = 1;}
  	else if (tuner_frequency < 160000000) {cp = 5; band = 1;}
  	else if (tuner_frequency < 200000000) {cp = 6; band = 1;}
  	else if (tuner_frequency < 290000000) {cp = 3; band = 2;}
  	else if (tuner_frequency < 420000000) {cp = 5; band = 2;}
  	else if (tuner_frequency < 480000000) {cp = 6; band = 2;}
  	else if (tuner_frequency < 620000000) {cp = 3; band = 4;}
  	else if (tuner_frequency < 830000000) {cp = 5; band = 4;}
  	else if (tuner_frequency < 895000000) {cp = 7; band = 4;}
  	else {return -EINVAL;}
  
  	// assume PLL filter should always be 8MHz for the moment.
  	filter = 1;
  
  	// calculate divisor
  	// (Finput + Fif)/Fref; Fif = 36125000 Hz, Fref = 62500 Hz
  	tuner_frequency = ((p->frequency + 36125000) / 62500);
  
  	// setup tuner buffer
  	tuner_buf[0] = tuner_frequency >> 8;
  	tuner_buf[1] = tuner_frequency & 0xff;
  	tuner_buf[2] = 0xc8;
  	tuner_buf[3] = (cp << 5) | (filter << 3) | band;
  	tuner_buf[4] = 0x80;
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1) != 1) {
  		printk("dvb-ttusb-budget: dvbc_philips_tdm1316l_pll_set Error 1\n");
  		return -EIO;
  	}
  
  	msleep(50);
  
  	if (fe->ops.i2c_gate_ctrl)
  		fe->ops.i2c_gate_ctrl(fe, 1);
  	if (i2c_transfer(&ttusb->i2c_adap, &tuner_msg, 1) != 1) {
  		printk("dvb-ttusb-budget: dvbc_philips_tdm1316l_pll_set Error 2\n");
  		return -EIO;
  	}
  
  	msleep(1);
  
  	return 0;
  }
  
  static u8 dvbc_philips_tdm1316l_inittab[] = {
  	0x80, 0x21,
  	0x80, 0x20,
  	0x81, 0x01,
  	0x81, 0x00,
  	0x00, 0x09,
  	0x01, 0x69,
  	0x03, 0x00,
  	0x04, 0x00,
  	0x07, 0x00,
  	0x08, 0x00,
  	0x20, 0x00,
  	0x21, 0x40,
  	0x22, 0x00,
  	0x23, 0x00,
  	0x24, 0x40,
  	0x25, 0x88,
  	0x30, 0xff,
  	0x31, 0x00,
  	0x32, 0xff,
  	0x33, 0x00,
  	0x34, 0x50,
  	0x35, 0x7f,
  	0x36, 0x00,
  	0x37, 0x20,
  	0x38, 0x00,
  	0x40, 0x1c,
  	0x41, 0xff,
  	0x42, 0x29,
  	0x43, 0x20,
  	0x44, 0xff,
  	0x45, 0x00,
  	0x46, 0x00,
  	0x49, 0x04,
  	0x4a, 0xff,
  	0x4b, 0x7f,
  	0x52, 0x30,
  	0x55, 0xae,
  	0x56, 0x47,
  	0x57, 0xe1,
  	0x58, 0x3a,
  	0x5a, 0x1e,
  	0x5b, 0x34,
  	0x60, 0x00,
  	0x63, 0x00,
  	0x64, 0x00,
  	0x65, 0x00,
  	0x66, 0x00,
  	0x67, 0x00,
  	0x68, 0x00,
  	0x69, 0x00,
  	0x6a, 0x02,
  	0x6b, 0x00,
  	0x70, 0xff,
  	0x71, 0x00,
  	0x72, 0x00,
  	0x73, 0x00,
  	0x74, 0x0c,
  	0x80, 0x00,
  	0x81, 0x00,
  	0x82, 0x00,
  	0x83, 0x00,
  	0x84, 0x04,
  	0x85, 0x80,
  	0x86, 0x24,
  	0x87, 0x78,
  	0x88, 0x00,
  	0x89, 0x00,
  	0x90, 0x01,
  	0x91, 0x01,
  	0xa0, 0x00,
  	0xa1, 0x00,
  	0xa2, 0x00,
  	0xb0, 0x91,
  	0xb1, 0x0b,
  	0xc0, 0x4b,
  	0xc1, 0x00,
  	0xc2, 0x00,
  	0xd0, 0x00,
  	0xd1, 0x00,
  	0xd2, 0x00,
  	0xd3, 0x00,
  	0xd4, 0x00,
  	0xd5, 0x00,
  	0xde, 0x00,
  	0xdf, 0x00,
  	0x61, 0x38,
  	0x62, 0x0a,
  	0x53, 0x13,
  	0x59, 0x08,
  	0x55, 0x00,
  	0x56, 0x40,
  	0x57, 0x08,
  	0x58, 0x3d,
  	0x88, 0x10,
  	0xa0, 0x00,
  	0xa0, 0x00,
  	0xa0, 0x00,
  	0xa0, 0x04,
  	0xff, 0xff,
  };
  
  static struct stv0297_config dvbc_philips_tdm1316l_config = {
  	.demod_address = 0x1c,
  	.inittab = dvbc_philips_tdm1316l_inittab,
  	.invert = 0,
  };
  
  static void frontend_init(struct ttusb* ttusb)
  {
  	switch(le16_to_cpu(ttusb->dev->descriptor.idProduct)) {
  	case 0x1003: // Hauppauge/TT Nova-USB-S budget (stv0299/ALPS BSRU6|BSBE1(tsa5059))
  		// try the stv0299 based first
  		ttusb->fe = dvb_attach(stv0299_attach, &alps_stv0299_config, &ttusb->i2c_adap);
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.set_params = philips_tsa5059_tuner_set_params;
  
  			if(ttusb->revision == TTUSB_REV_2_2) { // ALPS BSBE1
  				alps_stv0299_config.inittab = alps_bsbe1_inittab;
  				dvb_attach(lnbp21_attach, ttusb->fe, &ttusb->i2c_adap, 0, 0);
  			} else { // ALPS BSRU6
  				ttusb->fe->ops.set_voltage = ttusb_set_voltage;
  			}
  			break;
  		}
  
  		// Grundig 29504-491
  		ttusb->fe = dvb_attach(tda8083_attach, &ttusb_novas_grundig_29504_491_config, &ttusb->i2c_adap);
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.set_params = ttusb_novas_grundig_29504_491_tuner_set_params;
  			ttusb->fe->ops.set_voltage = ttusb_set_voltage;
  			break;
  		}
  		break;
  
  	case 0x1004: // Hauppauge/TT DVB-C budget (ves1820/ALPS TDBE2(sp5659))
  		ttusb->fe = dvb_attach(ves1820_attach, &alps_tdbe2_config, &ttusb->i2c_adap, read_pwm(ttusb));
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.set_params = alps_tdbe2_tuner_set_params;
  			break;
  		}
  
  		ttusb->fe = dvb_attach(stv0297_attach, &dvbc_philips_tdm1316l_config, &ttusb->i2c_adap);
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.set_params = dvbc_philips_tdm1316l_tuner_set_params;
  			break;
  		}
  		break;
  
  	case 0x1005: // Hauppauge/TT Nova-USB-t budget (tda10046/Philips td1316(tda6651tt) OR cx22700/ALPS TDMB7(??))
  		// try the ALPS TDMB7 first
  		ttusb->fe = dvb_attach(cx22700_attach, &alps_tdmb7_config, &ttusb->i2c_adap);
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.set_params = alps_tdmb7_tuner_set_params;
  			break;
  		}
  
  		// Philips td1316
  		ttusb->fe = dvb_attach(tda10046_attach, &philips_tdm1316l_config, &ttusb->i2c_adap);
  		if (ttusb->fe != NULL) {
  			ttusb->fe->ops.tuner_ops.init = philips_tdm1316l_tuner_init;
  			ttusb->fe->ops.tuner_ops.set_params = philips_tdm1316l_tuner_set_params;
  			break;
  		}
  		break;
  	}
  
  	if (ttusb->fe == NULL) {
  		printk("dvb-ttusb-budget: A frontend driver was not found for device [%04x:%04x]\n",
  		       le16_to_cpu(ttusb->dev->descriptor.idVendor),
  		       le16_to_cpu(ttusb->dev->descriptor.idProduct));
  	} else {
  		if (dvb_register_frontend(&ttusb->adapter, ttusb->fe)) {
  			printk("dvb-ttusb-budget: Frontend registration failed!\n");
  			dvb_frontend_detach(ttusb->fe);
  			ttusb->fe = NULL;
  		}
  	}
  }
  
  
  
  static struct i2c_algorithm ttusb_dec_algo = {
  	.master_xfer	= master_xfer,
  	.functionality	= functionality,
  };
  
  static int ttusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
  {
  	struct usb_device *udev;
  	struct ttusb *ttusb;
  	int result;
  
  	dprintk("%s: TTUSB DVB connected\n", __func__);
  
  	udev = interface_to_usbdev(intf);
  
  	if (intf->altsetting->desc.bInterfaceNumber != 1) return -ENODEV;
  
  	if (!(ttusb = kzalloc(sizeof(struct ttusb), GFP_KERNEL)))
  		return -ENOMEM;
  
  	ttusb->dev = udev;
  	ttusb->c = 0;
  	ttusb->mux_state = 0;
  	mutex_init(&ttusb->semi2c);
  
  	mutex_lock(&ttusb->semi2c);
  
  	mutex_init(&ttusb->semusb);
  
  	ttusb_setup_interfaces(ttusb);
  
  	result = ttusb_alloc_iso_urbs(ttusb);
  	if (result < 0) {
  		dprintk("%s: ttusb_alloc_iso_urbs - failed\n", __func__);
  		mutex_unlock(&ttusb->semi2c);
  		kfree(ttusb);
  		return result;
  	}
  
  	if (ttusb_init_controller(ttusb))
  		printk("ttusb_init_controller: error\n");
  
  	mutex_unlock(&ttusb->semi2c);
  
  	result = dvb_register_adapter(&ttusb->adapter,
  				      "Technotrend/Hauppauge Nova-USB",
  				      THIS_MODULE, &udev->dev, adapter_nr);
  	if (result < 0) {
  		ttusb_free_iso_urbs(ttusb);
  		kfree(ttusb);
  		return result;
  	}
  	ttusb->adapter.priv = ttusb;
  
  	/* i2c */
  	memset(&ttusb->i2c_adap, 0, sizeof(struct i2c_adapter));
  	strcpy(ttusb->i2c_adap.name, "TTUSB DEC");
  
  	i2c_set_adapdata(&ttusb->i2c_adap, ttusb);
  
  	ttusb->i2c_adap.algo              = &ttusb_dec_algo;
  	ttusb->i2c_adap.algo_data         = NULL;
  	ttusb->i2c_adap.dev.parent	  = &udev->dev;
  
  	result = i2c_add_adapter(&ttusb->i2c_adap);
  	if (result)
  		goto err_unregister_adapter;
  
  	memset(&ttusb->dvb_demux, 0, sizeof(ttusb->dvb_demux));
  
  	ttusb->dvb_demux.dmx.capabilities =
  	    DMX_TS_FILTERING | DMX_SECTION_FILTERING;
  	ttusb->dvb_demux.priv = NULL;
  #ifdef TTUSB_HWSECTIONS
  	ttusb->dvb_demux.filternum = TTUSB_MAXFILTER;
  #else
  	ttusb->dvb_demux.filternum = 32;
  #endif
  	ttusb->dvb_demux.feednum = TTUSB_MAXCHANNEL;
  	ttusb->dvb_demux.start_feed = ttusb_start_feed;
  	ttusb->dvb_demux.stop_feed = ttusb_stop_feed;
  	ttusb->dvb_demux.write_to_decoder = NULL;
  
  	result = dvb_dmx_init(&ttusb->dvb_demux);
  	if (result < 0) {
  		printk("ttusb_dvb: dvb_dmx_init failed (errno = %d)\n", result);
  		result = -ENODEV;
  		goto err_i2c_del_adapter;
  	}
  //FIXME dmxdev (nur WAS?)
  	ttusb->dmxdev.filternum = ttusb->dvb_demux.filternum;
  	ttusb->dmxdev.demux = &ttusb->dvb_demux.dmx;
  	ttusb->dmxdev.capabilities = 0;
  
  	result = dvb_dmxdev_init(&ttusb->dmxdev, &ttusb->adapter);
  	if (result < 0) {
  		printk("ttusb_dvb: dvb_dmxdev_init failed (errno = %d)\n",
  		       result);
  		result = -ENODEV;
  		goto err_release_dmx;
  	}
  
  	if (dvb_net_init(&ttusb->adapter, &ttusb->dvbnet, &ttusb->dvb_demux.dmx)) {
  		printk("ttusb_dvb: dvb_net_init failed!\n");
  		result = -ENODEV;
  		goto err_release_dmxdev;
  	}
  
  	usb_set_intfdata(intf, (void *) ttusb);
  
  	frontend_init(ttusb);
  
  	return 0;
  
  err_release_dmxdev:
  	dvb_dmxdev_release(&ttusb->dmxdev);
  err_release_dmx:
  	dvb_dmx_release(&ttusb->dvb_demux);
  err_i2c_del_adapter:
  	i2c_del_adapter(&ttusb->i2c_adap);
  err_unregister_adapter:
  	dvb_unregister_adapter (&ttusb->adapter);
  	ttusb_free_iso_urbs(ttusb);
  	kfree(ttusb);
  	return result;
  }
  
  static void ttusb_disconnect(struct usb_interface *intf)
  {
  	struct ttusb *ttusb = usb_get_intfdata(intf);
  
  	usb_set_intfdata(intf, NULL);
  
  	ttusb->disconnecting = 1;
  
  	ttusb_stop_iso_xfer(ttusb);
  
  	ttusb->dvb_demux.dmx.close(&ttusb->dvb_demux.dmx);
  	dvb_net_release(&ttusb->dvbnet);
  	dvb_dmxdev_release(&ttusb->dmxdev);
  	dvb_dmx_release(&ttusb->dvb_demux);
  	if (ttusb->fe != NULL) {
  		dvb_unregister_frontend(ttusb->fe);
  		dvb_frontend_detach(ttusb->fe);
  	}
  	i2c_del_adapter(&ttusb->i2c_adap);
  	dvb_unregister_adapter(&ttusb->adapter);
  
  	ttusb_free_iso_urbs(ttusb);
  
  	kfree(ttusb);
  
  	dprintk("%s: TTUSB DVB disconnected\n", __func__);
  }
  
  static struct usb_device_id ttusb_table[] = {
  	{USB_DEVICE(0xb48, 0x1003)},
  	{USB_DEVICE(0xb48, 0x1004)},
  	{USB_DEVICE(0xb48, 0x1005)},
  	{}
  };
  
  MODULE_DEVICE_TABLE(usb, ttusb_table);
  
  static struct usb_driver ttusb_driver = {
        .name		= "ttusb",
        .probe		= ttusb_probe,
        .disconnect	= ttusb_disconnect,
        .id_table		= ttusb_table,
  };
  
  module_usb_driver(ttusb_driver);
  
  MODULE_AUTHOR("Holger Waechtler <holger@convergence.de>");
  MODULE_DESCRIPTION("TTUSB DVB Driver");
  MODULE_LICENSE("GPL");
  MODULE_FIRMWARE("ttusb-budget/dspbootcode.bin");
  