budget-patch.c

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/*
 * budget-patch.c: driver for Budget Patch,
 * hardware modification of DVB-S cards enabling full TS
 *
 * Written by Emard <[email protected]>
 *
 * Original idea by Roberto Deza <[email protected]>
 *
 * Special thanks to Holger Waechtler, Michael Hunold, Marian Durkovic
 * and Metzlerbros
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 *
 * the project's page is at http://www.linuxtv.org/ 
 */

#include "av7110.h"
#include "av7110_hw.h"
#include "budget.h"
#include "stv0299.h"
#include "ves1x93.h"
#include "tda8083.h"

#include "bsru6.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define budget_patch budget

static struct saa7146_extension budget_extension;

MAKE_BUDGET_INFO(ttbp, "TT-Budget/Patch DVB-S 1.x PCI", BUDGET_PATCH);
//MAKE_BUDGET_INFO(satel,"TT-Budget/Patch SATELCO PCI", BUDGET_TT_HW_DISEQC);

static struct pci_device_id pci_tbl[] = {
    MAKE_EXTENSION_PCI(ttbp,0x13c2, 0x0000),
//        MAKE_EXTENSION_PCI(satel, 0x13c2, 0x1013),
    {
        .vendor    = 0,
    }
};

/* those lines are for budget-patch to be tried
** on a true budget card and observe the
** behaviour of VSYNC generated by rps1.
** this code was shamelessly copy/pasted from budget.c
*/
static void gpio_Set22K (struct budget *budget, int state)
{
    struct saa7146_dev *dev=budget->dev;
    dprintk(2, "budget: %p\n", budget);
    saa7146_setgpio(dev, 3, (state ? SAA7146_GPIO_OUTHI : SAA7146_GPIO_OUTLO));
}

/* Diseqc functions only for TT Budget card */
/* taken from the Skyvision DVB driver by
   Ralph Metzler <[email protected]> */

static void DiseqcSendBit (struct budget *budget, int data)
{
    struct saa7146_dev *dev=budget->dev;
    dprintk(2, "budget: %p\n", budget);

    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
    udelay(data ? 500 : 1000);
    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
    udelay(data ? 1000 : 500);
}

static void DiseqcSendByte (struct budget *budget, int data)
{
    int i, par=1, d;

    dprintk(2, "budget: %p\n", budget);

    for (i=7; i>=0; i--) {
        d = (data>>i)&1;
        par ^= d;
        DiseqcSendBit(budget, d);
    }

    DiseqcSendBit(budget, par);
}

static int SendDiSEqCMsg (struct budget *budget, int len, u8 *msg, unsigned long burst)
{
    struct saa7146_dev *dev=budget->dev;
    int i;

    dprintk(2, "budget: %p\n", budget);

    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
    mdelay(16);

    for (i=0; i<len; i++)
        DiseqcSendByte(budget, msg[i]);

    mdelay(16);

    if (burst!=-1) {
        if (burst)
            DiseqcSendByte(budget, 0xff);
        else {
            saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
            mdelay(12);
            udelay(500);
            saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
        }
        msleep(20);
    }

    return 0;
}

/* shamelessly copy/pasted from budget.c
*/
static int budget_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
    struct budget* budget = (struct budget*) fe->dvb->priv;

    switch (tone) {
    case SEC_TONE_ON:
        gpio_Set22K (budget, 1);
        break;

    case SEC_TONE_OFF:
        gpio_Set22K (budget, 0);
        break;

    default:
        return -EINVAL;
    }

    return 0;
}

static int budget_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
    struct budget* budget = (struct budget*) fe->dvb->priv;

    SendDiSEqCMsg (budget, cmd->msg_len, cmd->msg, 0);

    return 0;
}

static int budget_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
{
    struct budget* budget = (struct budget*) fe->dvb->priv;

    SendDiSEqCMsg (budget, 0, NULL, minicmd);

    return 0;
}

static int budget_av7110_send_fw_cmd(struct budget_patch *budget, u16* buf, int length)
{
    int i;

    dprintk(2, "budget: %p\n", budget);

    for (i = 2; i < length; i++)
    {
          ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2*i, 2, (u32) buf[i], 0,0);
          msleep(5);
    }
    if (length)
          ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, (u32) buf[1], 0,0);
    else
          ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, 0, 0,0);
    msleep(5);
    ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND, 2, (u32) buf[0], 0,0);
    msleep(5);
    return 0;
}

static void av7110_set22k(struct budget_patch *budget, int state)
{
    u16 buf[2] = {( COMTYPE_AUDIODAC << 8) | (state ? ON22K : OFF22K), 0};

    dprintk(2, "budget: %p\n", budget);
    budget_av7110_send_fw_cmd(budget, buf, 2);
}

static int av7110_send_diseqc_msg(struct budget_patch *budget, int len, u8 *msg, int burst)
{
    int i;
    u16 buf[18] = { ((COMTYPE_AUDIODAC << 8) | SendDiSEqC),
        16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    dprintk(2, "budget: %p\n", budget);

    if (len>10)
        len=10;

    buf[1] = len+2;
    buf[2] = len;

    if (burst != -1)
        buf[3]=burst ? 0x01 : 0x00;
    else
        buf[3]=0xffff;

    for (i=0; i<len; i++)
        buf[i+4]=msg[i];

    budget_av7110_send_fw_cmd(budget, buf, 18);
    return 0;
}

static int budget_patch_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
    struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

    switch (tone) {
    case SEC_TONE_ON:
        av7110_set22k (budget, 1);
        break;

    case SEC_TONE_OFF:
        av7110_set22k (budget, 0);
        break;

    default:
        return -EINVAL;
    }

    return 0;
}

static int budget_patch_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
    struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

    av7110_send_diseqc_msg (budget, cmd->msg_len, cmd->msg, 0);

    return 0;
}

static int budget_patch_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
{
    struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

    av7110_send_diseqc_msg (budget, 0, NULL, minicmd);

    return 0;
}

static int alps_bsrv2_tuner_set_params(struct dvb_frontend *fe)
{
    struct dtv_frontend_properties *p = &fe->dtv_property_cache;
    struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
    u8 pwr = 0;
    u8 buf[4];
    struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
    u32 div = (p->frequency + 479500) / 125;

    if (p->frequency > 2000000)
        pwr = 3;
    else if (p->frequency > 1800000)
        pwr = 2;
    else if (p->frequency > 1600000)
        pwr = 1;
    else if (p->frequency > 1200000)
        pwr = 0;
    else if (p->frequency >= 1100000)
        pwr = 1;
    else pwr = 2;

    buf[0] = (div >> 8) & 0x7f;
    buf[1] = div & 0xff;
    buf[2] = ((div & 0x18000) >> 10) | 0x95;
    buf[3] = (pwr << 6) | 0x30;

    // NOTE: since we're using a prescaler of 2, we set the
    // divisor frequency to 62.5kHz and divide by 125 above

    if (fe->ops.i2c_gate_ctrl)
        fe->ops.i2c_gate_ctrl(fe, 1);
    if (i2c_transfer (&budget->i2c_adap, &msg, 1) != 1)
        return -EIO;
    return 0;
}

static struct ves1x93_config alps_bsrv2_config = {
    .demod_address = 0x08,
    .xin = 90100000UL,
    .invert_pwm = 0,
};

static int grundig_29504_451_tuner_set_params(struct dvb_frontend *fe)
{
    struct dtv_frontend_properties *p = &fe->dtv_property_cache;
    struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
    u32 div;
    u8 data[4];
    struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };

    div = p->frequency / 125;
    data[0] = (div >> 8) & 0x7f;
    data[1] = div & 0xff;
    data[2] = 0x8e;
    data[3] = 0x00;

    if (fe->ops.i2c_gate_ctrl)
        fe->ops.i2c_gate_ctrl(fe, 1);
    if (i2c_transfer (&budget->i2c_adap, &msg, 1) != 1)
        return -EIO;
    return 0;
}

static struct tda8083_config grundig_29504_451_config = {
    .demod_address = 0x68,
};

static void frontend_init(struct budget_patch* budget)
{
    switch(budget->dev->pci->subsystem_device) {
    case 0x0000: // Hauppauge/TT WinTV DVB-S rev1.X
    case 0x1013: // SATELCO Multimedia PCI

        // try the ALPS BSRV2 first of all
        budget->dvb_frontend = dvb_attach(ves1x93_attach, &alps_bsrv2_config, &budget->i2c_adap);
        if (budget->dvb_frontend) {
            budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsrv2_tuner_set_params;
            budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_patch_diseqc_send_master_cmd;
            budget->dvb_frontend->ops.diseqc_send_burst = budget_patch_diseqc_send_burst;
            budget->dvb_frontend->ops.set_tone = budget_patch_set_tone;
            break;
        }

        // try the ALPS BSRU6 now
        budget->dvb_frontend = dvb_attach(stv0299_attach, &alps_bsru6_config, &budget->i2c_adap);
        if (budget->dvb_frontend) {
            budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsru6_tuner_set_params;
            budget->dvb_frontend->tuner_priv = &budget->i2c_adap;

            budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
            budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
            budget->dvb_frontend->ops.set_tone = budget_set_tone;
            break;
        }

        // Try the grundig 29504-451
        budget->dvb_frontend = dvb_attach(tda8083_attach, &grundig_29504_451_config, &budget->i2c_adap);
        if (budget->dvb_frontend) {
            budget->dvb_frontend->ops.tuner_ops.set_params = grundig_29504_451_tuner_set_params;
            budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
            budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
            budget->dvb_frontend->ops.set_tone = budget_set_tone;
            break;
        }
        break;
    }

    if (budget->dvb_frontend == NULL) {
        printk("dvb-ttpci: A frontend driver was not found for device [%04x:%04x] subsystem [%04x:%04x]\n",
               budget->dev->pci->vendor,
               budget->dev->pci->device,
               budget->dev->pci->subsystem_vendor,
               budget->dev->pci->subsystem_device);
    } else {
        if (dvb_register_frontend(&budget->dvb_adapter, budget->dvb_frontend)) {
            printk("budget-av: Frontend registration failed!\n");
            dvb_frontend_detach(budget->dvb_frontend);
            budget->dvb_frontend = NULL;
        }
    }
}

/* written by Emard */
static int budget_patch_attach (struct saa7146_dev* dev, struct saa7146_pci_extension_data *info)
{
    struct budget_patch *budget;
    int err;
    int count = 0;
    int detected = 0;

#define PATCH_RESET 0
#define RPS_IRQ 0
#define HPS_SETUP 0
#if PATCH_RESET
    saa7146_write(dev, MC1, MASK_31);
    msleep(40);
#endif
#if HPS_SETUP
    // initialize registers. Better to have it like this
    // than leaving something unconfigured
    saa7146_write(dev, DD1_STREAM_B, 0);
    // port B VSYNC at rising edge
    saa7146_write(dev, DD1_INIT, 0x00000200);  // have this in budget-core too!
    saa7146_write(dev, BRS_CTRL, 0x00000000);  // VBI

    // debi config
    // saa7146_write(dev, DEBI_CONFIG, MASK_30|MASK_28|MASK_18);

    // zero all HPS registers
    saa7146_write(dev, HPS_H_PRESCALE, 0);                  // r68
    saa7146_write(dev, HPS_H_SCALE, 0);                     // r6c
    saa7146_write(dev, BCS_CTRL, 0);                        // r70
    saa7146_write(dev, HPS_V_SCALE, 0);                     // r60
    saa7146_write(dev, HPS_V_GAIN, 0);                      // r64
    saa7146_write(dev, CHROMA_KEY_RANGE, 0);                // r74
    saa7146_write(dev, CLIP_FORMAT_CTRL, 0);                // r78
    // Set HPS prescaler for port B input
    saa7146_write(dev, HPS_CTRL, (1<<30) | (0<<29) | (1<<28) | (0<<12) );
    saa7146_write(dev, MC2,
      0 * (MASK_08 | MASK_24)  |   // BRS control
      0 * (MASK_09 | MASK_25)  |   // a
      0 * (MASK_10 | MASK_26)  |   // b
      1 * (MASK_06 | MASK_22)  |   // HPS_CTRL1
      1 * (MASK_05 | MASK_21)  |   // HPS_CTRL2
      0 * (MASK_01 | MASK_15)      // DEBI
       );
#endif
    // Disable RPS1 and RPS0
    saa7146_write(dev, MC1, ( MASK_29 | MASK_28));
    // RPS1 timeout disable
    saa7146_write(dev, RPS_TOV1, 0);

    // code for autodetection
    // will wait for VBI_B event (vertical blank at port B)
    // and will reset GPIO3 after VBI_B is detected.
    // (GPIO3 should be raised high by CPU to
    // test if GPIO3 will generate vertical blank signal
    // in budget patch GPIO3 is connected to VSYNC_B
    count = 0;
#if 0
    WRITE_RPS1(CMD_UPLOAD |
      MASK_10 | MASK_09 | MASK_08 | MASK_06 | MASK_05 | MASK_04 | MASK_03 | MASK_02 );
#endif
    WRITE_RPS1(CMD_PAUSE | EVT_VBI_B);
    WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
    WRITE_RPS1(GPIO3_MSK);
    WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
#if RPS_IRQ
    // issue RPS1 interrupt to increment counter
    WRITE_RPS1(CMD_INTERRUPT);
    // at least a NOP is neede between two interrupts
    WRITE_RPS1(CMD_NOP);
    // interrupt again
    WRITE_RPS1(CMD_INTERRUPT);
#endif
    WRITE_RPS1(CMD_STOP);

#if RPS_IRQ
    // set event counter 1 source as RPS1 interrupt (0x03)          (rE4 p53)
    // use 0x03 to track RPS1 interrupts - increase by 1 every gpio3 is toggled
    // use 0x15 to track VPE  interrupts - increase by 1 every vpeirq() is called
    saa7146_write(dev, EC1SSR, (0x03<<2) | 3 );
    // set event counter 1 threshold to maximum allowed value        (rEC p55)
    saa7146_write(dev, ECT1R,  0x3fff );
#endif
    // Fix VSYNC level
    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
    // Set RPS1 Address register to point to RPS code               (r108 p42)
    saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);
    // Enable RPS1,                                                 (rFC p33)
    saa7146_write(dev, MC1, (MASK_13 | MASK_29 ));


    mdelay(50);
    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
    mdelay(150);


    if( (saa7146_read(dev, GPIO_CTRL) & 0x10000000) == 0)
        detected = 1;

#if RPS_IRQ
    printk("Event Counter 1 0x%04x\n", saa7146_read(dev, EC1R) & 0x3fff );
#endif
    // Disable RPS1
    saa7146_write(dev, MC1, ( MASK_29 ));

    if(detected == 0)
        printk("budget-patch not detected or saa7146 in non-default state.\n"
               "try enabling ressetting of 7146 with MASK_31 in MC1 register\n");

    else
        printk("BUDGET-PATCH DETECTED.\n");


/*      OLD (Original design by Roberto Deza):
**      This code will setup the SAA7146_RPS1 to generate a square
**      wave on GPIO3, changing when a field (TS_HEIGHT/2 "lines" of
**      TS_WIDTH packets) has been acquired on SAA7146_D1B video port;
**      then, this GPIO3 output which is connected to the D1B_VSYNC
**      input, will trigger the acquisition of the alternate field
**      and so on.
**      Currently, the TT_budget / WinTV_Nova cards have two ICs
**      (74HCT4040, LVC74) for the generation of this VSYNC signal,
**      which seems that can be done perfectly without this :-)).
*/

/*      New design (By Emard)
**      this rps1 code will copy internal HS event to GPIO3 pin.
**      GPIO3 is in budget-patch hardware connected to port B VSYNC

**      HS is an internal event of 7146, accessible with RPS
**      and temporarily raised high every n lines
**      (n in defined in the RPS_THRESH1 counter threshold)
**      I think HS is raised high on the beginning of the n-th line
**      and remains high until this n-th line that triggered
**      it is completely received. When the reception of n-th line
**      ends, HS is lowered.

**      To transmit data over DMA, 7146 needs changing state at
**      port B VSYNC pin. Any changing of port B VSYNC will
**      cause some DMA data transfer, with more or less packets loss.
**      It depends on the phase and frequency of VSYNC and
**      the way of 7146 is instructed to trigger on port B (defined
**      in DD1_INIT register, 3rd nibble from the right valid
**      numbers are 0-7, see datasheet)
**
**      The correct triggering can minimize packet loss,
**      dvbtraffic should give this stable bandwidths:
**        22k transponder = 33814 kbit/s
**      27.5k transponder = 38045 kbit/s
**      by experiment it is found that the best results
**      (stable bandwidths and almost no packet loss)
**      are obtained using DD1_INIT triggering number 2
**      (Va at rising edge of VS Fa = HS x VS-failing forced toggle)
**      and a VSYNC phase that occurs in the middle of DMA transfer
**      (about byte 188*512=96256 in the DMA window).
**
**      Phase of HS is still not clear to me how to control,
**      It just happens to be so. It can be seen if one enables
**      RPS_IRQ and print Event Counter 1 in vpeirq(). Every
**      time RPS_INTERRUPT is called, the Event Counter 1 will
**      increment. That's how the 7146 is programmed to do event
**      counting in this budget-patch.c
**      I *think* HPS setting has something to do with the phase
**      of HS but I can't be 100% sure in that.

**      hardware debug note: a working budget card (including budget patch)
**      with vpeirq() interrupt setup in mode "0x90" (every 64K) will
**      generate 3 interrupts per 25-Hz DMA frame of 2*188*512 bytes
**      and that means 3*25=75 Hz of interrupt frequency, as seen by
**      watch cat /proc/interrupts
**
**      If this frequency is 3x lower (and data received in the DMA
**      buffer don't start with 0x47, but in the middle of packets,
**      whose lengths appear to be like 188 292 188 104 etc.
**      this means VSYNC line is not connected in the hardware.
**      (check soldering pcb and pins)
**      The same behaviour of missing VSYNC can be duplicated on budget
**      cards, by setting DD1_INIT trigger mode 7 in 3rd nibble.
*/

    // Setup RPS1 "program" (p35)
    count = 0;


    // Wait Source Line Counter Threshold                           (p36)
    WRITE_RPS1(CMD_PAUSE | EVT_HS);
    // Set GPIO3=1                                                  (p42)
    WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
    WRITE_RPS1(GPIO3_MSK);
    WRITE_RPS1(SAA7146_GPIO_OUTHI<<24);
#if RPS_IRQ
    // issue RPS1 interrupt
    WRITE_RPS1(CMD_INTERRUPT);
#endif
    // Wait reset Source Line Counter Threshold                     (p36)
    WRITE_RPS1(CMD_PAUSE | RPS_INV | EVT_HS);
    // Set GPIO3=0                                                  (p42)
    WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
    WRITE_RPS1(GPIO3_MSK);
    WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
#if RPS_IRQ
    // issue RPS1 interrupt
    WRITE_RPS1(CMD_INTERRUPT);
#endif
    // Jump to begin of RPS program                                 (p37)
    WRITE_RPS1(CMD_JUMP);
    WRITE_RPS1(dev->d_rps1.dma_handle);

    // Fix VSYNC level
    saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
    // Set RPS1 Address register to point to RPS code               (r108 p42)
    saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);

    if (!(budget = kmalloc (sizeof(struct budget_patch), GFP_KERNEL)))
        return -ENOMEM;

    dprintk(2, "budget: %p\n", budget);

    err = ttpci_budget_init(budget, dev, info, THIS_MODULE, adapter_nr);
    if (err) {
        kfree(budget);
        return err;
    }

    // Set Source Line Counter Threshold, using BRS                 (rCC p43)
    // It generates HS event every TS_HEIGHT lines
    // this is related to TS_WIDTH set in register
    // NUM_LINE_BYTE3 in budget-core.c. If NUM_LINE_BYTE
    // low 16 bits are set to TS_WIDTH bytes (TS_WIDTH=2*188
    //,then RPS_THRESH1
    // should be set to trigger every TS_HEIGHT (512) lines.
    //
    saa7146_write(dev, RPS_THRESH1, budget->buffer_height | MASK_12 );

    // saa7146_write(dev, RPS_THRESH0, ((TS_HEIGHT/2)<<16) |MASK_28| (TS_HEIGHT/2) |MASK_12 );
    // Enable RPS1                                                  (rFC p33)
    saa7146_write(dev, MC1, (MASK_13 | MASK_29));


    dev->ext_priv = budget;

    budget->dvb_adapter.priv = budget;
    frontend_init(budget);

    ttpci_budget_init_hooks(budget);

    return 0;
}

static int budget_patch_detach (struct saa7146_dev* dev)
{
    struct budget_patch *budget = (struct budget_patch*) dev->ext_priv;
    int err;

    if (budget->dvb_frontend) {
        dvb_unregister_frontend(budget->dvb_frontend);
        dvb_frontend_detach(budget->dvb_frontend);
    }
    err = ttpci_budget_deinit (budget);

    kfree (budget);

    return err;
}

static int __init budget_patch_init(void)
{
    return saa7146_register_extension(&budget_extension);
}

static void __exit budget_patch_exit(void)
{
    saa7146_unregister_extension(&budget_extension);
}

static struct saa7146_extension budget_extension = {
    .name           = "budget_patch dvb",
    .flags          = 0,

    .module         = THIS_MODULE,
    .pci_tbl        = pci_tbl,
    .attach         = budget_patch_attach,
    .detach         = budget_patch_detach,

    .irq_mask       = MASK_10,
    .irq_func       = ttpci_budget_irq10_handler,
};

module_init(budget_patch_init);
module_exit(budget_patch_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Emard, Roberto Deza, Holger Waechtler, Michael Hunold, others");
MODULE_DESCRIPTION("Driver for full TS modified DVB-S SAA7146+AV7110 "
           "based so-called Budget Patch cards");