// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * TTUSB DVB driver
 *
 * Copyright (c) 2002 Holger Waechtler <holger@convergence.de>
 * Copyright (c) 2003 Felix Domke <tmbinc@elitedvb.net>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 <media/dvb_frontend.h>
#include <media/dmxdev.h>
#include <media/dvb_demux.h>
#include <media/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(fmt, arg...) do {                                       \
        if (debug)                                                      \
                printk(KERN_DEBUG pr_fmt("%s: " fmt),                   \
                       __func__, ##arg);                                \
} 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"

#define MAX_SEND        0x28
#define MAX_RCV         0x20

/*
 *  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;

        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 send_buf[MAX_SEND];
        u8 last_result[MAX_RCV];

        int revision;

        struct dvb_frontend* fe;
};

static int ttusb_cmd(struct ttusb *ttusb, u8 *data, int len, int len_result)
{
        int actual_len;
        int err;

        if (mutex_lock_interruptible(&ttusb->semusb) < 0)
                return -EAGAIN;

        if (debug >= 3)
                dprintk("> %*ph\n", len, data);

        memcpy(data, ttusb->send_buf, len);

        err = usb_bulk_msg(ttusb->dev, ttusb->bulk_out_pipe,
                           ttusb->send_buf, len, &actual_len, 1000);
        if (err != 0) {
                dprintk("usb_bulk_msg(send) failed, err == %i!\n", err);
                goto err;
        }
        if (actual_len != len) {
                err = -EIO;
                dprintk("only wrote %d of %d bytes\n",
                        actual_len, len);
                goto err;
        }

        err = usb_bulk_msg(ttusb->dev, ttusb->bulk_in_pipe,
                           ttusb->last_result, MAX_RCV, &actual_len, 1000);

        if (err != 0) {
                pr_err("cmd xter failed, receive error %d\n", err);
                goto err;
        }

        if (debug >= 3) {
                actual_len = ttusb->last_result[3] + 4;
                dprintk("< %*ph\n", actual_len, ttusb->last_result);
        }

        if (len_result)
                memcpy(ttusb->send_buf, ttusb->last_result, len_result);

err:
        mutex_unlock(&ttusb->semusb);
        return err;
}

static int ttusb_i2c_msg(struct ttusb *ttusb,
                  u8 addr, u8 * snd_buf, u8 snd_len, u8 * rcv_buf,
                  u8 rcv_len)
{
        u8 b[MAX_SEND];
        u8 id = ++ttusb->c;
        int i, err;

        if (snd_len > MAX_SEND - 7 || rcv_len > MAX_RCV - 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, MAX_RCV);

        if (err)
                return -EREMOTEIO;

        /* 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("usb_bulk_msg(recv) failed, err == %i, id == %02x, b == ",
                                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("i == %i\n", 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) {
                pr_err("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 split. */
        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("usb_bulk_msg() failed, return value %i!\n", 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 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), 0)))
                return err;

        if ((err = ttusb_cmd(ttusb, get_version,
                             sizeof(get_version), sizeof(get_version))))
                return err;

        dprintk("stc-version: %c%c%c%c%c\n", 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)) {
                pr_err("unknown STC version %c%c%c%c%c, please report!\n",
                       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), sizeof(get_dsp_version));
        if (err)
                return err;

        pr_info("dsp-version: %c%c%c\n",
               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("usb_bulk_msg() failed, return value %i!\n", 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("usb_bulk_msg() failed, return value %i!\n", 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("usb_bulk_msg() failed, return value %i!\n", 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("muxpack has invalid len %d\n", len);
                numinvalid++;
                return;
        }

        for (i = 0; i < len; i += 2)
                csum ^= le16_to_cpup((__le16 *) (muxpack + i));
        if (csum) {
                pr_warn("muxpack with incorrect checksum, ignoring\n");
                numinvalid++;
                return;
        }

        cc = (muxpack[len - 4] << 8) | muxpack[len - 3];
        cc &= 0x7FFF;
        if ((cc != ttusb->cc) && (ttusb->cc != -1))
                pr_warn("cc discontinuity (%d frames missing)\n",
                        (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
                dprintk("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++;
                pr_err("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--)) {
                        pr_err("too much work\n");
                        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) {
                                        pr_info("lost sync.\n");
                                        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("invalid state: first byte is %x\n",
                                                        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 (!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]);
        kfree(ttusb->iso_buffer);
}

static int ttusb_alloc_iso_urbs(struct ttusb *ttusb)
{
        int i;

        ttusb->iso_buffer = kcalloc(FRAMES_PER_ISO_BUF * ISO_BUF_COUNT,
                        ISO_FRAME_SIZE, GFP_KERNEL);
        if (!ttusb->iso_buffer)
                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) {
                pr_err("iso xfer already running!\n");
                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);
                        pr_err("failed urb submission (%i: err = %i)!\n",
                               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) {
                pr_err("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) {
                pr_err("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) {
                pr_err("no frontend driver 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)) {
                        pr_err("Frontend registration failed!\n");
                        dvb_frontend_detach(ttusb->fe);
                        ttusb->fe = NULL;
                }
        }
}



static const 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("TTUSB DVB connected\n");

        udev = interface_to_usbdev(intf);

        if (intf->altsetting->desc.bInterfaceNumber != 1) return -ENODEV;

        if (!(ttusb = kzalloc_obj(struct ttusb)))
                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("ttusb_alloc_iso_urbs - failed\n");
                mutex_unlock(&ttusb->semi2c);
                kfree(ttusb);
                return result;
        }

        if (ttusb_init_controller(ttusb))
                pr_err("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));
        strscpy(ttusb->i2c_adap.name, "TTUSB DEC", sizeof(ttusb->i2c_adap.name));

        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) {
                pr_err("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) {
                pr_err("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)) {
                pr_err("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("TTUSB DVB disconnected\n");
}

static const 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");