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/*

    mxb.c - v4l2 driver for the Multimedia eXtension Board

    Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de>

    Visit http://www.mihu.de/linux/saa7146/mxb/

    for further details about this card.

    This program is free software; you can redistribute it and/or modify

    it under the terms of the GNU General Public License as published by

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License

    along with this program; if not, write to the Free Software

    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#define DEBUG_VARIABLE debug

#include <media/saa7146_vv.h>

#include <linux/video_decoder.h>        /* for saa7111a */

#include "mxb.h"

#include "tea6415c.h"

#include "tea6420.h"

#include "tda9840.h"

#include <media/tuner.h>

#define I2C_SAA7111A            0x24

/* All unused bytes are reserverd. */

#define SAA711X_CHIP_VERSION            0x00

#define SAA711X_ANALOG_INPUT_CONTROL_1  0x02

#define SAA711X_ANALOG_INPUT_CONTROL_2  0x03

#define SAA711X_ANALOG_INPUT_CONTROL_3  0x04

#define SAA711X_ANALOG_INPUT_CONTROL_4  0x05

#define SAA711X_HORIZONTAL_SYNC_START   0x06

#define SAA711X_HORIZONTAL_SYNC_STOP    0x07

#define SAA711X_SYNC_CONTROL            0x08

#define SAA711X_LUMINANCE_CONTROL       0x09

#define SAA711X_LUMINANCE_BRIGHTNESS    0x0A

#define SAA711X_LUMINANCE_CONTRAST      0x0B

#define SAA711X_CHROMA_SATURATION       0x0C

#define SAA711X_CHROMA_HUE_CONTROL      0x0D

#define SAA711X_CHROMA_CONTROL          0x0E

#define SAA711X_FORMAT_DELAY_CONTROL    0x10

#define SAA711X_OUTPUT_CONTROL_1        0x11

#define SAA711X_OUTPUT_CONTROL_2        0x12

#define SAA711X_OUTPUT_CONTROL_3        0x13

#define SAA711X_V_GATE_1_START          0x15

#define SAA711X_V_GATE_1_STOP           0x16

#define SAA711X_V_GATE_1_MSB            0x17

#define SAA711X_TEXT_SLICER_STATUS      0x1A

#define SAA711X_DECODED_BYTES_OF_TS_1   0x1B

#define SAA711X_DECODED_BYTES_OF_TS_2   0x1C

#define SAA711X_STATUS_BYTE             0x1F

#define MXB_BOARD_CAN_DO_VBI(dev)   (dev->revision != 0) 

/* global variable */

static int mxb_num = 0;

/* initial frequence the tuner will be tuned to.

   in verden (lower saxony, germany) 4148 is a

   channel called "phoenix" */

static int freq = 4148;

MODULE_PARM(freq,"i");

MODULE_PARM_DESC(freq, "initial frequency the tuner will be tuned to while setup");

static int debug = 0;

MODULE_PARM(debug,"i");

MODULE_PARM_DESC(debug, "debug verbosity");

#define MXB_INPUTS 4

enum { TUNER, AUX1, AUX3, AUX3_YC };

static struct v4l2_input mxb_inputs[MXB_INPUTS] = {

        { TUNER,        "Tuner",                V4L2_INPUT_TYPE_TUNER,  1, 0, V4L2_STD_PAL_BG|V4L2_STD_NTSC_M, 0 },

        { AUX1,         "AUX1",                 V4L2_INPUT_TYPE_CAMERA, 2, 0, V4L2_STD_PAL_BG|V4L2_STD_NTSC_M, 0 },

        { AUX3,         "AUX3 Composite",       V4L2_INPUT_TYPE_CAMERA, 4, 0, V4L2_STD_PAL_BG|V4L2_STD_NTSC_M, 0 },

        { AUX3_YC,      "AUX3 S-Video",         V4L2_INPUT_TYPE_CAMERA, 4, 0, V4L2_STD_PAL_BG|V4L2_STD_NTSC_M, 0 },

};

/* this array holds the information, which port of the saa7146 each

   input actually uses. the mxb uses port 0 for every input */

static struct {

        int hps_source;

        int hps_sync;

} input_port_selection[MXB_INPUTS] = {  

        { SAA7146_HPS_SOURCE_PORT_A, SAA7146_HPS_SYNC_PORT_A },

        { SAA7146_HPS_SOURCE_PORT_A, SAA7146_HPS_SYNC_PORT_A },

        { SAA7146_HPS_SOURCE_PORT_A, SAA7146_HPS_SYNC_PORT_A },

        { SAA7146_HPS_SOURCE_PORT_A, SAA7146_HPS_SYNC_PORT_A },

};

/* this array holds the information of the audio source (mxb_audios),

   which has to be switched corresponding to the video source (mxb_channels) */

static int video_audio_connect[MXB_INPUTS] =

        { 0, 1, 3, 3 };

/* these are the necessary input-output-pins for bringing one audio source

(see above) to the CD-output */

static struct tea6420_multiplex TEA6420_cd[MXB_AUDIOS+1][2] =

                {

                {{1,1,0},{1,1,0}},      /* Tuner */

                {{5,1,0},{6,1,0}},      /* AUX 1 */

                {{4,1,0},{6,1,0}},      /* AUX 2 */

                {{3,1,0},{6,1,0}},      /* AUX 3 */

                {{1,1,0},{3,1,0}},      /* Radio */

                {{1,1,0},{2,1,0}},      /* CD-Rom */

                {{6,1,0},{6,1,0}}       /* Mute */

                };

/* these are the necessary input-output-pins for bringing one audio source

(see above) to the line-output */

static struct tea6420_multiplex TEA6420_line[MXB_AUDIOS+1][2] =

                {

                {{2,3,0},{1,2,0}},

                {{5,3,0},{6,2,0}},

                {{4,3,0},{6,2,0}},

                {{3,3,0},{6,2,0}},

                {{2,3,0},{3,2,0}},

                {{2,3,0},{2,2,0}},

                {{6,3,0},{6,2,0}}       /* Mute */

                };

#define MAXCONTROLS     1

static struct v4l2_queryctrl mxb_controls[] = {

        { V4L2_CID_AUDIO_MUTE, V4L2_CTRL_TYPE_BOOLEAN, "Mute", 0, 1, 1, 0, 0 },

};

static struct saa7146_extension_ioctls ioctls[] = {

        { VIDIOC_ENUMINPUT,     SAA7146_EXCLUSIVE },

        { VIDIOC_G_INPUT,       SAA7146_EXCLUSIVE },

        { VIDIOC_S_INPUT,       SAA7146_EXCLUSIVE },

        { VIDIOC_QUERYCTRL,     SAA7146_BEFORE },

        { VIDIOC_G_CTRL,        SAA7146_BEFORE },

        { VIDIOC_S_CTRL,        SAA7146_BEFORE },

        { VIDIOC_G_TUNER,       SAA7146_EXCLUSIVE },

        { VIDIOC_S_TUNER,       SAA7146_EXCLUSIVE },

        { VIDIOC_G_FREQUENCY,   SAA7146_EXCLUSIVE },

        { VIDIOC_S_FREQUENCY,   SAA7146_EXCLUSIVE },

        { VIDIOC_G_AUDIO,       SAA7146_EXCLUSIVE },

        { VIDIOC_S_AUDIO,       SAA7146_EXCLUSIVE },

        { MXB_S_AUDIO_CD,       SAA7146_EXCLUSIVE },    /* custom control */   

        { MXB_S_AUDIO_LINE,     SAA7146_EXCLUSIVE },    /* custom control */   

        { 0,                    0 }

};

struct mxb

{

        struct video_device     video_dev;

        struct video_device     vbi_dev;

        struct i2c_adapter      i2c_adapter;   

        struct i2c_client*      saa7111a;

        struct i2c_client*      tda9840;

        struct i2c_client*      tea6415c;

        struct i2c_client*      tuner;

        struct i2c_client*      tea6420_1;

        struct i2c_client*      tea6420_2;

        int     cur_mode;       /* current audio mode (mono, stereo, ...) */

        int     cur_input;      /* current input */

        int     cur_freq;       /* current frequency the tuner is tuned to */

        int     cur_mute;       /* current mute status */

};

static struct saa7146_extension extension;

static int mxb_vbi_bypass(struct saa7146_dev* dev)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        s32 byte = 0x0;

        int result = 0;

        DEB_EE(("dev:%p\n",dev));

        /* switch bypass in saa7111a, this should be done in the

           saa7111a driver of course... */

        if ( -1 == (result = i2c_smbus_read_byte_data(mxb->saa7111a, SAA711X_OUTPUT_CONTROL_3))) {

                DEB_D(("could not read from saa7111a.\n"));

                return -EFAULT;

        }

        byte = result;

        byte &= 0xf0;

        byte |= 0x0a;

        if ( 0 != (result = i2c_smbus_write_byte_data(mxb->saa7111a, SAA711X_OUTPUT_CONTROL_3, byte))) {

                DEB_D(("could not write to saa7111a.\n"));

                return -EFAULT;

        }

        return 0;

}

static int mxb_probe(struct saa7146_dev* dev)

{

        struct mxb* mxb = 0;

        int i = 0;     

        request_module("tuner");

        request_module("tea6420");

        request_module("tea6415c");

        request_module("tda9840");

        request_module("saa7111");

        mxb = (struct mxb*)kmalloc(sizeof(struct mxb), GFP_KERNEL);

        if( NULL == mxb ) {

                DEB_D(("not enough kernel memory.\n"));

                return -ENOMEM;

        }

        memset(mxb, 0x0, sizeof(struct mxb));  

        saa7146_i2c_adapter_prepare(dev, &mxb->i2c_adapter, SAA7146_I2C_BUS_BIT_RATE_480);

        if(i2c_add_adapter(&mxb->i2c_adapter) < 0) {

                DEB_S(("cannot register i2c-device. skipping.\n"));

                kfree(mxb);

                return -EFAULT;

        }

        /* loop through all i2c-devices on the bus and look who is there */

        for(i = 0; i < I2C_CLIENT_MAX; i++) {

                if( NULL == mxb->i2c_adapter.clients[i] ) {

                        continue;

                }

                if( I2C_TEA6420_1 == mxb->i2c_adapter.clients[i]->addr )

                        mxb->tea6420_1 = mxb->i2c_adapter.clients[i];

                if( I2C_TEA6420_2 == mxb->i2c_adapter.clients[i]->addr )

                        mxb->tea6420_2 = mxb->i2c_adapter.clients[i];

                if( I2C_TEA6415C_2 == mxb->i2c_adapter.clients[i]->addr )

                        mxb->tea6415c = mxb->i2c_adapter.clients[i];

                if( I2C_TDA9840 == mxb->i2c_adapter.clients[i]->addr )

                        mxb->tda9840 = mxb->i2c_adapter.clients[i];

                if( I2C_SAA7111A == mxb->i2c_adapter.clients[i]->addr )

                        mxb->saa7111a = mxb->i2c_adapter.clients[i];

                if( 0x60 == mxb->i2c_adapter.clients[i]->addr )

                        mxb->tuner = mxb->i2c_adapter.clients[i];

        }

        /* check if all devices are present */

        if(    0 == mxb->tea6420_1      || 0 == mxb->tea6420_2  || 0 == mxb->tea6415c

            || 0 == mxb->tda9840        || 0 == mxb->saa7111a   || 0 == mxb->tuner ) {

                printk("mxb: did not find all i2c devices. are you sure you\n");

                printk("mxb: insmod'ed tea6420, tea6415c, saa7111, tea6415c and tuner?\n");

                i2c_del_adapter(&mxb->i2c_adapter);

                kfree(mxb);

                return -ENODEV;

        }

        /* all devices are present, probe was successful */    

        /* we store the pointer in our private data field */

        (struct mxb*)dev->ext_priv = mxb;

        return 0;

}

/* some init data for the saa7740, the so-called 'sound arena module'.

   there are no specs available, so we simply use some init values */

static struct {

        int     length;

        char    data[9];

} mxb_saa7740_init[] = {

        { 3, { 0x80, 0x00, 0x00 } },{ 3, { 0x80, 0x89, 0x00 } },

        { 3, { 0x80, 0xb0, 0x0a } },{ 3, { 0x00, 0x00, 0x00 } },

        { 3, { 0x49, 0x00, 0x00 } },{ 3, { 0x4a, 0x00, 0x00 } },

        { 3, { 0x4b, 0x00, 0x00 } },{ 3, { 0x4c, 0x00, 0x00 } },

        { 3, { 0x4d, 0x00, 0x00 } },{ 3, { 0x4e, 0x00, 0x00 } },

        { 3, { 0x4f, 0x00, 0x00 } },{ 3, { 0x50, 0x00, 0x00 } },

        { 3, { 0x51, 0x00, 0x00 } },{ 3, { 0x52, 0x00, 0x00 } },

        { 3, { 0x53, 0x00, 0x00 } },{ 3, { 0x54, 0x00, 0x00 } },

        { 3, { 0x55, 0x00, 0x00 } },{ 3, { 0x56, 0x00, 0x00 } },

        { 3, { 0x57, 0x00, 0x00 } },{ 3, { 0x58, 0x00, 0x00 } },

        { 3, { 0x59, 0x00, 0x00 } },{ 3, { 0x5a, 0x00, 0x00 } },

        { 3, { 0x5b, 0x00, 0x00 } },{ 3, { 0x5c, 0x00, 0x00 } },

        { 3, { 0x5d, 0x00, 0x00 } },{ 3, { 0x5e, 0x00, 0x00 } },

        { 3, { 0x5f, 0x00, 0x00 } },{ 3, { 0x60, 0x00, 0x00 } },

        { 3, { 0x61, 0x00, 0x00 } },{ 3, { 0x62, 0x00, 0x00 } },

        { 3, { 0x63, 0x00, 0x00 } },{ 3, { 0x64, 0x00, 0x00 } },

        { 3, { 0x65, 0x00, 0x00 } },{ 3, { 0x66, 0x00, 0x00 } },

        { 3, { 0x67, 0x00, 0x00 } },{ 3, { 0x68, 0x00, 0x00 } },

        { 3, { 0x69, 0x00, 0x00 } },{ 3, { 0x6a, 0x00, 0x00 } },

        { 3, { 0x6b, 0x00, 0x00 } },{ 3, { 0x6c, 0x00, 0x00 } },

        { 3, { 0x6d, 0x00, 0x00 } },{ 3, { 0x6e, 0x00, 0x00 } },

        { 3, { 0x6f, 0x00, 0x00 } },{ 3, { 0x70, 0x00, 0x00 } },

        { 3, { 0x71, 0x00, 0x00 } },{ 3, { 0x72, 0x00, 0x00 } },

        { 3, { 0x73, 0x00, 0x00 } },{ 3, { 0x74, 0x00, 0x00 } },

        { 3, { 0x75, 0x00, 0x00 } },{ 3, { 0x76, 0x00, 0x00 } },

        { 3, { 0x77, 0x00, 0x00 } },{ 3, { 0x41, 0x00, 0x42 } },

        { 3, { 0x42, 0x10, 0x42 } },{ 3, { 0x43, 0x20, 0x42 } },

        { 3, { 0x44, 0x30, 0x42 } },{ 3, { 0x45, 0x00, 0x01 } },

        { 3, { 0x46, 0x00, 0x01 } },{ 3, { 0x47, 0x00, 0x01 } },

        { 3, { 0x48, 0x00, 0x01 } },

        { 9, { 0x01, 0x03, 0xc5, 0x5c, 0x7a, 0x85, 0x01, 0x00, 0x54 } },

        { 9, { 0x21, 0x03, 0xc5, 0x5c, 0x7a, 0x85, 0x01, 0x00, 0x54 } },

        { 9, { 0x09, 0x0b, 0xb4, 0x6b, 0x74, 0x85, 0x95, 0x00, 0x34 } },

        { 9, { 0x29, 0x0b, 0xb4, 0x6b, 0x74, 0x85, 0x95, 0x00, 0x34 } },

        { 9, { 0x11, 0x17, 0x43, 0x62, 0x68, 0x89, 0xd1, 0xff, 0xb0 } },

        { 9, { 0x31, 0x17, 0x43, 0x62, 0x68, 0x89, 0xd1, 0xff, 0xb0 } },

        { 9, { 0x19, 0x20, 0x62, 0x51, 0x5a, 0x95, 0x19, 0x01, 0x50 } },

        { 9, { 0x39, 0x20, 0x62, 0x51, 0x5a, 0x95, 0x19, 0x01, 0x50 } },

        { 9, { 0x05, 0x3e, 0xd2, 0x69, 0x4e, 0x9a, 0x51, 0x00, 0xf0 } },

        { 9, { 0x25, 0x3e, 0xd2, 0x69, 0x4e, 0x9a, 0x51, 0x00, 0xf0 } },

        { 9, { 0x0d, 0x3d, 0xa1, 0x40, 0x7d, 0x9f, 0x29, 0xfe, 0x14 } },

        { 9, { 0x2d, 0x3d, 0xa1, 0x40, 0x7d, 0x9f, 0x29, 0xfe, 0x14 } },

        { 9, { 0x15, 0x73, 0xa1, 0x50, 0x5d, 0xa6, 0xf5, 0xfe, 0x38 } },

        { 9, { 0x35, 0x73, 0xa1, 0x50, 0x5d, 0xa6, 0xf5, 0xfe, 0x38 } },

        { 9, { 0x1d, 0xed, 0xd0, 0x68, 0x29, 0xb4, 0xe1, 0x00, 0xb8 } },

        { 9, { 0x3d, 0xed, 0xd0, 0x68, 0x29, 0xb4, 0xe1, 0x00, 0xb8 } },

        { 3, { 0x80, 0xb3, 0x0a } },

        {-1, { 0} }

};

static unsigned char mxb_saa7111_init[25] = {

        0x00,

        0x00,     /* 00 - ID byte */

        0x00,     /* 01 - reserved */

        /*front end */

        0xd8,     /* 02 - FUSE=x, GUDL=x, MODE=x */

        0x23,     /* 03 - HLNRS=0, VBSL=1, WPOFF=0, HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */

        0x00,     /* 04 - GAI1=256 */

        0x00,     /* 05 - GAI2=256 */

        /* decoder */

        0xf0,     /* 06 - HSB at  xx(50Hz) /  xx(60Hz) pixels after end of last line */

        0x30,     /* 07 - HSS at  xx(50Hz) /  xx(60Hz) pixels after end of last line */

        0xa8,     /* 08 - AUFD=x, FSEL=x, EXFIL=x, VTRC=x, HPLL=x, VNOI=x */

        0x02,     /* 09 - BYPS=x, PREF=x, BPSS=x, VBLB=x, UPTCV=x, APER=x */

        0x80,     /* 0a - BRIG=128 */

        0x47,     /* 0b - CONT=1.109 */

        0x40,     /* 0c - SATN=1.0 */

        0x00,     /* 0d - HUE=0 */

        0x01,     /* 0e - CDTO=0, CSTD=0, DCCF=0, FCTC=0, CHBW=1 */

        0x00,     /* 0f - reserved */

        0xd0,     /* 10 - OFTS=x, HDEL=x, VRLN=x, YDEL=x */

        0x8c,     /* 11 - GPSW=x, CM99=x, FECO=x, COMPO=x, OEYC=1, OEHV=1, VIPB=0, COLO=0 */

        0x80,     /* 12 - xx output control 2 */

        0x30,     /* 13 - xx output control 3 */

        0x00,     /* 14 - reserved */

        0x15,     /* 15 - VBI */

        0x04,     /* 16 - VBI */

        0x00,     /* 17 - VBI */

};

/* bring hardware to a sane state. this has to be done, just in case someone

   wants to capture from this device before it has been properly initialized.

   the capture engine would badly fail, because no valid signal arrives on the

   saa7146, thus leading to timeouts and stuff. */

static int mxb_init_done(struct saa7146_dev* dev)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        struct i2c_msg msg;

        int i = 0, err = 0;

        struct  tea6415c_multiplex vm; 

        /* write configuration to saa7111a */

        i = i2c_master_send(mxb->saa7111a, mxb_saa7111_init, sizeof(mxb_saa7111_init));

        if (i < 0) {

                printk("failed to initialize saa7111a. this should never happen.\n");

        }

        /* select tuner-output on saa7111a */

        i = 0;

        mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_INPUT, &i);

//      i = VIDEO_MODE_PAL;

//      mxb->saa7111a->driver->command(mxb->saa7111a,DECODER_SET_NORM, &i);

        mxb_vbi_bypass(dev);

        /* select a tuner type */

        i = 5;

        mxb->tuner->driver->command(mxb->tuner,TUNER_SET_TYPE, &i);

        /* mute audio on tea6420s */

        mxb->tea6420_1->driver->command(mxb->tea6420_1,TEA6420_SWITCH, &TEA6420_line[6][0]);

        mxb->tea6420_2->driver->command(mxb->tea6420_2,TEA6420_SWITCH, &TEA6420_line[6][1]);

        mxb->tea6420_1->driver->command(mxb->tea6420_1,TEA6420_SWITCH, &TEA6420_cd[6][0]);

        mxb->tea6420_2->driver->command(mxb->tea6420_2,TEA6420_SWITCH, &TEA6420_cd[6][1]);

        /* switch to tuner-channel on tea6415c*/

        vm.out = 17;

        vm.in  = 3;

        mxb->tea6415c->driver->command(mxb->tea6415c,TEA6415C_SWITCH, &vm);

        /* select tuner-output on multicable on tea6415c*/

        vm.in  = 3;

        vm.out = 13;

        mxb->tea6415c->driver->command(mxb->tea6415c,TEA6415C_SWITCH, &vm);

        /* tune in some frequency on tuner */

        mxb->tuner->driver->command(mxb->tuner, VIDIOCSFREQ, &freq);

        /* the rest for mxb */

        mxb->cur_input = 0;

        mxb->cur_freq = freq;

        mxb->cur_mute = 1;

        mxb->cur_mode = V4L2_TUNER_MODE_STEREO;

        mxb->tda9840->driver->command(mxb->tda9840, TDA9840_SWITCH, &mxb->cur_mode);

        /* check if the saa7740 (aka 'sound arena module') is present

           on the mxb. if so, we must initialize it. due to lack of

           informations about the saa7740, the values were reverse

           engineered. */

        msg.addr = 0x1b;

        msg.flags = 0;

        msg.len = mxb_saa7740_init[0].length;

        msg.buf = &mxb_saa7740_init[0].data[0];

        if( 1 == (err = i2c_transfer(&mxb->i2c_adapter, &msg, 1))) {

                /* the sound arena module is a pos, that's probably the reason

                   philips refuses to hand out a datasheet for the saa7740...

                   it seems to screw up the i2c bus, so we disable fast irq

                   based i2c transactions here and rely on the slow and safe

                   polling method ... */

                extension.flags &= ~SAA7146_USE_I2C_IRQ;

                for(i = 1;;i++) {

                        if( -1 == mxb_saa7740_init[i].length ) {

                                break;

                        }

                        msg.len = mxb_saa7740_init[i].length;          

                        msg.buf = &mxb_saa7740_init[i].data[0];

                        if( 1 != (err = i2c_transfer(&mxb->i2c_adapter, &msg, 1))) {

                                DEB_D(("failed to initialize 'sound arena module'.\n"));

                                goto err;

                        }

                }

                INFO(("'sound arena module' detected.\n"));

        }

err:   

        /* the rest for saa7146: you should definitely set some basic values

           for the input-port handling of the saa7146. */

        /* ext->saa has been filled by the core driver */

        /* some stuff is done via variables */

        saa7146_set_hps_source_and_sync(dev, input_port_selection[mxb->cur_input].hps_source, input_port_selection[mxb->cur_input].hps_sync);

        /* some stuff is done via direct write to the registers */

        /* this is ugly, but because of the fact that this is completely

           hardware dependend, it should be done directly... */

        saa7146_write(dev, DD1_STREAM_B,        0x00000000);

        saa7146_write(dev, DD1_INIT,            0x02000200);

        saa7146_write(dev, MC2, (MASK_09 | MASK_25 | MASK_10 | MASK_26));

        return 0;

}

/* interrupt-handler. this gets called when irq_mask is != 0.

   it must clear the interrupt-bits in irq_mask it has handled */

/*

void mxb_irq_bh(struct saa7146_dev* dev, u32* irq_mask)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

}

*/

static struct saa7146_ext_vv vv_data;

/* this function only gets called when the probing was successful */

static int mxb_attach(struct saa7146_dev* dev, struct saa7146_pci_extension_data *info)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        DEB_EE(("dev:%p\n",dev));

        /* checking for i2c-devices can be omitted here, because we

           already did this in "mxb_vl42_probe" */

        saa7146_vv_init(dev,&vv_data);

        if( 0 != saa7146_register_device(&mxb->video_dev, dev, "mxb", VFL_TYPE_GRABBER)) {

                ERR(("cannot register capture v4l2 device. skipping.\n"));

                return -1;

        }

        /* initialization stuff (vbi) (only for revision > 0 and for extensions which want it)*/

        if( 0 != MXB_BOARD_CAN_DO_VBI(dev)) {

                if( 0 != saa7146_register_device(&mxb->vbi_dev, dev, "mxb", VFL_TYPE_VBI)) {

                        ERR(("cannot register vbi v4l2 device. skipping.\n"));

                }

        }

        i2c_use_client(mxb->tea6420_1);

        i2c_use_client(mxb->tea6420_2);

        i2c_use_client(mxb->tea6415c);

        i2c_use_client(mxb->tda9840);

        i2c_use_client(mxb->saa7111a);

        i2c_use_client(mxb->tuner);

        printk("mxb: found 'Multimedia eXtension Board'-%d.\n",mxb_num);

        mxb_num++;

        mxb_init_done(dev);

        return 0;

}

static int mxb_detach(struct saa7146_dev* dev)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        DEB_EE(("dev:%p\n",dev));

        i2c_release_client(mxb->tea6420_1);

        i2c_release_client(mxb->tea6420_2);

        i2c_release_client(mxb->tea6415c);

        i2c_release_client(mxb->tda9840);

        i2c_release_client(mxb->saa7111a);

        i2c_release_client(mxb->tuner);

        saa7146_unregister_device(&mxb->video_dev,dev);

        if( 0 != MXB_BOARD_CAN_DO_VBI(dev)) {

                saa7146_unregister_device(&mxb->vbi_dev,dev);

        }

        saa7146_vv_release(dev);

        mxb_num--;

        i2c_del_adapter(&mxb->i2c_adapter);

        kfree(mxb);

        return 0;

}

/* hack: this should go into saa711x */

static int saa7111_set_gpio(struct saa7146_dev *dev, int bl)

{

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        s32 byte = 0x0;

        int result = 0;

        DEB_EE(("dev:%p\n",dev));

        /* get the old register contents */

        if ( -1 == (byte = i2c_smbus_read_byte_data(mxb->saa7111a, SAA711X_OUTPUT_CONTROL_1))) {

                DEB_D(("could not read from saa711x\n"));

                return -EFAULT;

        }

        if( 0 == bl ) {

                byte &= 0x7f;

        } else {

                byte |= 0x80;

        }

        /* write register contents back */

        if ( 0 != (result = i2c_smbus_write_byte_data(mxb->saa7111a, SAA711X_OUTPUT_CONTROL_1, byte))) {

                DEB_D(("could not write to saa711x\n"));

                return -EFAULT;

        }

        return 0;

}

static int mxb_ioctl(struct saa7146_fh *fh, unsigned int cmd, void *arg)

{

        struct saa7146_dev *dev = fh->dev;

        struct mxb* mxb = (struct mxb*)dev->ext_priv;

        struct saa7146_vv *vv = dev->vv_data;

        switch(cmd) {

        case VIDIOC_ENUMINPUT:

        {

                struct v4l2_input *i = arg;

                DEB_EE(("VIDIOC_ENUMINPUT %d.\n",i->index));

                if( i->index < 0 || i->index >= MXB_INPUTS) {

                        return -EINVAL;

                }

                memcpy(i, &mxb_inputs[i->index], sizeof(struct v4l2_input));

                return 0;

        }

        /* the saa7146 provides some controls (brightness, contrast, saturation)

           which gets registered *after* this function. because of this we have

           to return with a value != 0 even if the function succeded.. */

        case VIDIOC_QUERYCTRL:

        {

                struct v4l2_queryctrl *qc = arg;

                int i;

                for (i = MAXCONTROLS - 1; i >= 0; i--) {

                        if (mxb_controls[i].id == qc->id) {

                                *qc = mxb_controls[i];

                                DEB_D(("VIDIOC_QUERYCTRL %d.\n",qc->id));

                                return 0;

                        }

                }

                return -EAGAIN;

        }

        case VIDIOC_G_CTRL:

        {

                struct v4l2_control *vc = arg;

                int i;

                for (i = MAXCONTROLS - 1; i >= 0; i--) {

                        if (mxb_controls[i].id == vc->id) {

                                break;

                        }

                }

                if( i < 0 ) {

                        return -EAGAIN;

                }

                switch (vc->id ) {

                        case V4L2_CID_AUDIO_MUTE: {

                                vc->value = mxb->cur_mute;

                                DEB_D(("VIDIOC_G_CTRL V4L2_CID_AUDIO_MUTE:%d.\n",vc->value));

                                return 0;

                        }

                }

                DEB_EE(("VIDIOC_G_CTRL V4L2_CID_AUDIO_MUTE:%d.\n",vc->value));

                return 0;

        }

        case VIDIOC_S_CTRL:

        {

                struct  v4l2_control    *vc = arg;

                int i = 0;

                for (i = MAXCONTROLS - 1; i >= 0; i--) {

                        if (mxb_controls[i].id == vc->id) {

                                break;

                        }

                }

                if( i < 0 ) {

                        return -EAGAIN;

                }

                switch (vc->id ) {

                        case V4L2_CID_AUDIO_MUTE: {

                                mxb->cur_mute = vc->value;

                                if( 0 == vc->value ) {

                                        /* switch the audio-source */

                                        mxb->tea6420_1->driver->command(mxb->tea6420_1,TEA6420_SWITCH, &TEA6420_line[video_audio_connect[mxb->cur_input]][0]);

                                        mxb->tea6420_2->driver->command(mxb->tea6420_2,TEA6420_SWITCH, &TEA6420_line[video_audio_connect[mxb->cur_input]][1]);

                                } else {

                                        mxb->tea6420_1->driver->command(mxb->tea6420_1,TEA6420_SWITCH, &TEA6420_line[6][0]);

                                        mxb->tea6420_2->driver->command(mxb->tea6420_2,TEA6420_SWITCH, &TEA6420_line[6][1]);