/*
 * $Id: tuner.c,v 1.36 2005/01/14 13:29:40 kraxel Exp $
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>

#include <media/tuner.h>
#include <media/audiochip.h>

#define UNSET (-1U)

/* standard i2c insmod options */
static unsigned short normal_i2c[] = {I2C_CLIENT_END};
static unsigned short normal_i2c_range[] = {0x60,0x6f,I2C_CLIENT_END};
I2C_CLIENT_INSMOD;

/* insmod options used at init time => read/only */
static unsigned int type  =  UNSET;
static unsigned int addr  =  0;
module_param(type, int, 0444);
module_param(addr, int, 0444);

/* insmod options used at runtime => read/write */
static unsigned int debug         = 0;
static unsigned int tv_antenna    = 1;
static unsigned int radio_antenna = 0;
static unsigned int optimize_vco  = 1;
module_param(debug,             int, 0644);
module_param(tv_antenna,        int, 0644);
module_param(radio_antenna,     int, 0644);
module_param(optimize_vco,      int, 0644);

static unsigned int tv_range[2]    = { 44, 958 };
static unsigned int radio_range[2] = { 65, 108 };

module_param_array(tv_range,    int, NULL, 0644);
module_param_array(radio_range, int, NULL, 0644);

MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");

static int this_adap;
#define dprintk     if (debug) printk

struct tuner {
        unsigned int type;            /* chip type */
        unsigned int freq;            /* keep track of the current settings */
        v4l2_std_id  std;
        int          using_v4l2;

        enum v4l2_tuner_type mode;
        unsigned int input;

        // only for MT2032
        unsigned int xogc;
        unsigned int radio_if2;

        void (*tv_freq)(struct i2c_client *c, unsigned int freq);
        void (*radio_freq)(struct i2c_client *c, unsigned int freq);
};

static struct i2c_driver driver;
static struct i2c_client client_template;

/* ---------------------------------------------------------------------- */

/* tv standard selection for Temic 4046 FM5
   this value takes the low bits of control byte 2
   from datasheet Rev.01, Feb.00
     standard     BG      I       L       L2      D
     picture IF   38.9    38.9    38.9    33.95   38.9
     sound 1      33.4    32.9    32.4    40.45   32.4
     sound 2      33.16
     NICAM        33.05   32.348  33.05           33.05
 */
#define TEMIC_SET_PAL_I         0x05
#define TEMIC_SET_PAL_DK        0x09
#define TEMIC_SET_PAL_L         0x0a // SECAM ?
#define TEMIC_SET_PAL_L2        0x0b // change IF !
#define TEMIC_SET_PAL_BG        0x0c

/* tv tuner system standard selection for Philips FQ1216ME
   this value takes the low bits of control byte 2
   from datasheet "1999 Nov 16" (supersedes "1999 Mar 23")
     standard           BG      DK      I       L       L`
     picture carrier    38.90   38.90   38.90   38.90   33.95
     colour             34.47   34.47   34.47   34.47   38.38
     sound 1            33.40   32.40   32.90   32.40   40.45
     sound 2            33.16   -       -       -       -
     NICAM              33.05   33.05   32.35   33.05   39.80
 */
#define PHILIPS_SET_PAL_I       0x01 /* Bit 2 always zero !*/
#define PHILIPS_SET_PAL_BGDK    0x09
#define PHILIPS_SET_PAL_L2      0x0a
#define PHILIPS_SET_PAL_L       0x0b

/* system switching for Philips FI1216MF MK2
   from datasheet "1996 Jul 09",
    standard         BG     L      L'
    picture carrier  38.90  38.90  33.95
    colour           34.47  34.37  38.38
    sound 1          33.40  32.40  40.45
    sound 2          33.16  -      -
    NICAM            33.05  33.05  39.80
 */
#define PHILIPS_MF_SET_BG       0x01 /* Bit 2 must be zero, Bit 3 is system output */
#define PHILIPS_MF_SET_PAL_L    0x03 // France
#define PHILIPS_MF_SET_PAL_L2   0x02 // L'


/* ---------------------------------------------------------------------- */

struct tunertype
{
        char *name;
        unsigned char Vendor;
        unsigned char Type;

        unsigned short thresh1;  /*  band switch VHF_LO <=> VHF_HI  */
        unsigned short thresh2;  /*  band switch VHF_HI <=> UHF     */
        unsigned char VHF_L;
        unsigned char VHF_H;
        unsigned char UHF;
        unsigned char config;
        unsigned short IFPCoff; /* 622.4=16*38.90 MHz PAL,
                                   732  =16*45.75 NTSCi,
                                   940  =16*58.75 NTSC-Japan
                                   704  =16*44    ATSC */
};

/*
 *      The floats in the tuner struct are computed at compile time
 *      by gcc and cast back to integers. Thus we don't violate the
 *      "no float in kernel" rule.
 */
static struct tunertype tuners[] = {
        { "Temic PAL (4002 FH5)", TEMIC, PAL,
          16*140.25,16*463.25,0x02,0x04,0x01,0x8e,623},
        { "Philips PAL_I (FI1246 and compatibles)", Philips, PAL_I,
          16*140.25,16*463.25,0xa0,0x90,0x30,0x8e,623},
        { "Philips NTSC (FI1236,FM1236 and compatibles)", Philips, NTSC,
          16*157.25,16*451.25,0xA0,0x90,0x30,0x8e,732},
        { "Philips (SECAM+PAL_BG) (FI1216MF, FM1216MF, FR1216MF)", Philips, SECAM,
          16*168.25,16*447.25,0xA7,0x97,0x37,0x8e,623},

        { "NoTuner", NoTuner, NOTUNER,
          0,0,0x00,0x00,0x00,0x00,0x00},
        { "Philips PAL_BG (FI1216 and compatibles)", Philips, PAL,
          16*168.25,16*447.25,0xA0,0x90,0x30,0x8e,623},
        { "Temic NTSC (4032 FY5)", TEMIC, NTSC,
          16*157.25,16*463.25,0x02,0x04,0x01,0x8e,732},
        { "Temic PAL_I (4062 FY5)", TEMIC, PAL_I,
          16*170.00,16*450.00,0x02,0x04,0x01,0x8e,623},

        { "Temic NTSC (4036 FY5)", TEMIC, NTSC,
          16*157.25,16*463.25,0xa0,0x90,0x30,0x8e,732},
        { "Alps HSBH1", TEMIC, NTSC,
          16*137.25,16*385.25,0x01,0x02,0x08,0x8e,732},
        { "Alps TSBE1",TEMIC,PAL,
          16*137.25,16*385.25,0x01,0x02,0x08,0x8e,732},
        { "Alps TSBB5", Alps, PAL_I, /* tested (UK UHF) with Modulartech MM205 */
          16*133.25,16*351.25,0x01,0x02,0x08,0x8e,632},

        { "Alps TSBE5", Alps, PAL, /* untested - data sheet guess. Only IF differs. */
          16*133.25,16*351.25,0x01,0x02,0x08,0x8e,622},
        { "Alps TSBC5", Alps, PAL, /* untested - data sheet guess. Only IF differs. */
          16*133.25,16*351.25,0x01,0x02,0x08,0x8e,608},
        { "Temic PAL_BG (4006FH5)", TEMIC, PAL,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "Alps TSCH6",Alps,NTSC,
          16*137.25,16*385.25,0x14,0x12,0x11,0x8e,732},

        { "Temic PAL_DK (4016 FY5)",TEMIC,PAL,
          16*168.25,16*456.25,0xa0,0x90,0x30,0x8e,623},
        { "Philips NTSC_M (MK2)",Philips,NTSC,
          16*160.00,16*454.00,0xa0,0x90,0x30,0x8e,732},
        { "Temic PAL_I (4066 FY5)", TEMIC, PAL_I,
          16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},
        { "Temic PAL* auto (4006 FN5)", TEMIC, PAL,
          16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},

        { "Temic PAL_BG (4009 FR5) or PAL_I (4069 FR5)", TEMIC, PAL,
          16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
        { "Temic NTSC (4039 FR5)", TEMIC, NTSC,
          16*158.00, 16*453.00, 0xa0,0x90,0x30,0x8e,732},
        { "Temic PAL/SECAM multi (4046 FM5)", TEMIC, PAL,
          16*169.00, 16*454.00, 0xa0,0x90,0x30,0x8e,623},
        { "Philips PAL_DK (FI1256 and compatibles)", Philips, PAL,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},

        { "Philips PAL/SECAM multi (FQ1216ME)", Philips, PAL,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "LG PAL_I+FM (TAPC-I001D)", LGINNOTEK, PAL_I,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "LG PAL_I (TAPC-I701D)", LGINNOTEK, PAL_I,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "LG NTSC+FM (TPI8NSR01F)", LGINNOTEK, NTSC,
          16*210.00,16*497.00,0xa0,0x90,0x30,0x8e,732},

        { "LG PAL_BG+FM (TPI8PSB01D)", LGINNOTEK, PAL,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "LG PAL_BG (TPI8PSB11D)", LGINNOTEK, PAL,
          16*170.00,16*450.00,0xa0,0x90,0x30,0x8e,623},
        { "Temic PAL* auto + FM (4009 FN5)", TEMIC, PAL,
          16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
        { "SHARP NTSC_JP (2U5JF5540)", SHARP, NTSC, /* 940=16*58.75 NTSC@Japan */
          16*137.25,16*317.25,0x01,0x02,0x08,0x8e,940 },

        { "Samsung PAL TCPM9091PD27", Samsung, PAL,  /* from sourceforge v3tv */
          16*169,16*464,0xA0,0x90,0x30,0x8e,623},
        { "MT20xx universal", Microtune,PAL|NTSC,
               0,0,0,0,0,0,0},
        { "Temic PAL_BG (4106 FH5)", TEMIC, PAL,
          16*141.00, 16*464.00, 0xa0,0x90,0x30,0x8e,623},
        { "Temic PAL_DK/SECAM_L (4012 FY5)", TEMIC, PAL,
          16*140.25, 16*463.25, 0x02,0x04,0x01,0x8e,623},

        { "Temic NTSC (4136 FY5)", TEMIC, NTSC,
          16*158.00, 16*453.00, 0xa0,0x90,0x30,0x8e,732},
        { "LG PAL (newer TAPC series)", LGINNOTEK, PAL,
          16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,623},
        { "Philips PAL/SECAM multi (FM1216ME MK3)", Philips, PAL,
          16*160.00,16*442.00,0x01,0x02,0x04,0x8e,623 },
        { "LG NTSC (newer TAPC series)", LGINNOTEK, NTSC,
          16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,732},

        { "HITACHI V7-J180AT", HITACHI, NTSC,
          16*170.00, 16*450.00, 0x01,0x02,0x08,0x8e,940 },
        { "Philips PAL_MK (FI1216 MK)", Philips, PAL,
          16*140.25,16*463.25,0x01,0xc2,0xcf,0x8e,623},
        { "Philips 1236D ATSC/NTSC daul in",Philips,ATSC,
          16*157.25,16*454.00,0xa0,0x90,0x30,0x8e,732},
        { "Philips NTSC MK3 (FM1236MK3 or FM1236/F)", Philips, NTSC,
          16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732},

        { "Philips 4 in 1 (ATI TV Wonder Pro/Conexant)", Philips, NTSC,
          16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732},
        { "Microtune 4049 FM5",Microtune,PAL,
          16*141.00,16*464.00,0xa0,0x90,0x30,0x8e,623},
        { "Panasonic VP27s/ENGE4324D", Panasonic, NTSC,
          16*160.00,16*454.00,0x01,0x02,0x08,0xce,940},
        { "LG NTSC (TAPE series)", LGINNOTEK, NTSC,
          16*160.00,16*442.00,0x01,0x02,0x04,0x8e,732 },

        { "Tenna TNF 8831 BGFF)", Philips, PAL,
          16*161.25,16*463.25,0xa0,0x90,0x30,0x8e,623},
        { "Microtune 4042 FI5 ATSC/NTSC dual in", Microtune, NTSC,
          16*162.00,16*457.00,0xa2,0x94,0x31,0x8e,732},
        { "TCL 2002N", TCL, NTSC,
          16*172.00,16*448.00,0x01,0x02,0x08,0x8e,732},
        { "Philips PAL/SECAM_D (FM 1256 I-H3)", Philips, PAL,
          16*160.00,16*442.00,0x01,0x02,0x04,0x8e,623 },

        { "Thomson DDT 7610 ATSC/NTSC)", THOMSON, ATSC,
          16*157.25,16*454.00,0x39,0x3a,0x3c,0x8e,732},
        { "Philips FQ1286", Philips, NTSC,
          16*160.00,16*454.00,0x41,0x42,0x04,0x8e,940}, // UHF band untested

};
#define TUNERS ARRAY_SIZE(tuners)

/* ---------------------------------------------------------------------- */

static int tuner_getstatus(struct i2c_client *c)
{
        unsigned char byte;

        struct tuner *t = i2c_get_clientdata(c);

        if (t->type == TUNER_MT2032)
                return 0;

        if (1 != i2c_master_recv(c,&byte,1))
                return 0;
        return byte;
}

#define TUNER_POR       0x80
#define TUNER_FL        0x40
#define TUNER_MODE      0x38
#define TUNER_AFC       0x07

#define TUNER_STEREO    0x10 /* radio mode */
#define TUNER_SIGNAL    0x07 /* radio mode */

static int tuner_signal(struct i2c_client *c)
{
        return (tuner_getstatus(c) & TUNER_SIGNAL)<<13;
}

static int tuner_stereo(struct i2c_client *c)
{
        return (tuner_getstatus (c) & TUNER_STEREO);
}

#if 0 /* unused */
static int tuner_islocked (struct i2c_client *c)
{
        return (tuner_getstatus (c) & TUNER_FL);
}

static int tuner_afcstatus (struct i2c_client *c)
{
        return (tuner_getstatus (c) & TUNER_AFC) - 2;
}

static int tuner_mode (struct i2c_client *c)
{
        return (tuner_getstatus (c) & TUNER_MODE) >> 3;
}
#endif

/* ---------------------------------------------------------------------- */

#define MT2032 0x04
#define MT2030 0x06
#define MT2040 0x07
#define MT2050 0x42

static char *microtune_part[] = {
        [ MT2030 ] = "MT2030",
        [ MT2032 ] = "MT2032",
        [ MT2040 ] = "MT2040",
        [ MT2050 ] = "MT2050",
};

// IsSpurInBand()?
static int mt2032_spurcheck(int f1, int f2, int spectrum_from,int spectrum_to)
{
        int n1=1,n2,f;

        f1=f1/1000; //scale to kHz to avoid 32bit overflows
        f2=f2/1000;
        spectrum_from/=1000;
        spectrum_to/=1000;

        dprintk("spurcheck f1=%d f2=%d  from=%d to=%d\n",f1,f2,spectrum_from,spectrum_to);

        do {
            n2=-n1;
            f=n1*(f1-f2);
            do {
                n2--;
                f=f-f2;
                dprintk(" spurtest n1=%d n2=%d ftest=%d\n",n1,n2,f);

                if( (f>spectrum_from) && (f<spectrum_to))
                        printk("mt2032 spurcheck triggered: %d\n",n1);
            } while ( (f>(f2-spectrum_to)) || (n2>-5));
            n1++;
        } while (n1<5);

        return 1;
}

static int mt2032_compute_freq(unsigned int rfin,
                               unsigned int if1, unsigned int if2,
                               unsigned int spectrum_from,
                               unsigned int spectrum_to,
                               unsigned char *buf,
                               int *ret_sel,
                               unsigned int xogc) //all in Hz
{
        unsigned int fref,lo1,lo1n,lo1a,s,sel,lo1freq, desired_lo1,
                desired_lo2,lo2,lo2n,lo2a,lo2num,lo2freq;

        fref= 5250 *1000; //5.25MHz
        desired_lo1=rfin+if1;

        lo1=(2*(desired_lo1/1000)+(fref/1000)) / (2*fref/1000);
        lo1n=lo1/8;
        lo1a=lo1-(lo1n*8);

        s=rfin/1000/1000+1090;

        if(optimize_vco) {
                if(s>1890) sel=0;
                else if(s>1720) sel=1;
                else if(s>1530) sel=2;
                else if(s>1370) sel=3;
                else sel=4; // >1090
        }
        else {
                if(s>1790) sel=0; // <1958
                else if(s>1617) sel=1;
                else if(s>1449) sel=2;
                else if(s>1291) sel=3;
                else sel=4; // >1090
        }
        *ret_sel=sel;

        lo1freq=(lo1a+8*lo1n)*fref;

        dprintk("mt2032: rfin=%d lo1=%d lo1n=%d lo1a=%d sel=%d, lo1freq=%d\n",
                rfin,lo1,lo1n,lo1a,sel,lo1freq);

        desired_lo2=lo1freq-rfin-if2;
        lo2=(desired_lo2)/fref;
        lo2n=lo2/8;
        lo2a=lo2-(lo2n*8);
        lo2num=((desired_lo2/1000)%(fref/1000))* 3780/(fref/1000); //scale to fit in 32bit arith
        lo2freq=(lo2a+8*lo2n)*fref + lo2num*(fref/1000)/3780*1000;

        dprintk("mt2032: rfin=%d lo2=%d lo2n=%d lo2a=%d num=%d lo2freq=%d\n",
                rfin,lo2,lo2n,lo2a,lo2num,lo2freq);

        if(lo1a<0 || lo1a>7 || lo1n<17 ||lo1n>48 || lo2a<0 ||lo2a >7 ||lo2n<17 || lo2n>30) {
                printk("mt2032: frequency parameters out of range: %d %d %d %d\n",
                       lo1a, lo1n, lo2a,lo2n);
                return(-1);
        }

        mt2032_spurcheck(lo1freq, desired_lo2,  spectrum_from, spectrum_to);
        // should recalculate lo1 (one step up/down)

        // set up MT2032 register map for transfer over i2c
        buf[0]=lo1n-1;
        buf[1]=lo1a | (sel<<4);
        buf[2]=0x86; // LOGC
        buf[3]=0x0f; //reserved
        buf[4]=0x1f;
        buf[5]=(lo2n-1) | (lo2a<<5);
        if(rfin >400*1000*1000)
                buf[6]=0xe4;
        else
                buf[6]=0xf4; // set PKEN per rev 1.2
        buf[7]=8+xogc;
        buf[8]=0xc3; //reserved
        buf[9]=0x4e; //reserved
        buf[10]=0xec; //reserved
        buf[11]=(lo2num&0xff);
        buf[12]=(lo2num>>8) |0x80; // Lo2RST

        return 0;
}

static int mt2032_check_lo_lock(struct i2c_client *c)
{
        int try,lock=0;
        unsigned char buf[2];
        for(try=0;try<10;try++) {
                buf[0]=0x0e;
                i2c_master_send(c,buf,1);
                i2c_master_recv(c,buf,1);
                dprintk("mt2032 Reg.E=0x%02x\n",buf[0]);
                lock=buf[0] &0x06;

                if (lock==6)
                        break;

                dprintk("mt2032: pll wait 1ms for lock (0x%2x)\n",buf[0]);
                udelay(1000);
        }
        return lock;
}

static int mt2032_optimize_vco(struct i2c_client *c,int sel,int lock)
{
        unsigned char buf[2];
        int tad1;

        buf[0]=0x0f;
        i2c_master_send(c,buf,1);
        i2c_master_recv(c,buf,1);
        dprintk("mt2032 Reg.F=0x%02x\n",buf[0]);
        tad1=buf[0]&0x07;

        if(tad1 ==0) return lock;
        if(tad1 ==1) return lock;

        if(tad1==2) {
                if(sel==0)
                        return lock;
                else sel--;
        }
        else {
                if(sel<4)
                        sel++;
                else
                        return lock;
        }

        dprintk("mt2032 optimize_vco: sel=%d\n",sel);

        buf[0]=0x0f;
        buf[1]=sel;
        i2c_master_send(c,buf,2);
        lock=mt2032_check_lo_lock(c);
        return lock;
}


static void mt2032_set_if_freq(struct i2c_client *c, unsigned int rfin,
                               unsigned int if1, unsigned int if2,
                               unsigned int from, unsigned int to)
{
        unsigned char buf[21];
        int lint_try,ret,sel,lock=0;
        struct tuner *t = i2c_get_clientdata(c);

        dprintk("mt2032_set_if_freq rfin=%d if1=%d if2=%d from=%d to=%d\n",rfin,if1,if2,from,to);

        buf[0]=0;
        ret=i2c_master_send(c,buf,1);
        i2c_master_recv(c,buf,21);

        buf[0]=0;
        ret=mt2032_compute_freq(rfin,if1,if2,from,to,&buf[1],&sel,t->xogc);
        if (ret<0)
                return;

        // send only the relevant registers per Rev. 1.2
        buf[0]=0;
        ret=i2c_master_send(c,buf,4);
        buf[5]=5;
        ret=i2c_master_send(c,buf+5,4);
        buf[11]=11;
        ret=i2c_master_send(c,buf+11,3);
        if(ret!=3)
                printk("mt2032_set_if_freq failed with %d\n",ret);

        // wait for PLLs to lock (per manual), retry LINT if not.
        for(lint_try=0; lint_try<2; lint_try++) {
                lock=mt2032_check_lo_lock(c);

                if(optimize_vco)
                        lock=mt2032_optimize_vco(c,sel,lock);
                if(lock==6) break;

                printk("mt2032: re-init PLLs by LINT\n");
                buf[0]=7;
                buf[1]=0x80 +8+t->xogc; // set LINT to re-init PLLs
                i2c_master_send(c,buf,2);
                mdelay(10);
                buf[1]=8+t->xogc;
                i2c_master_send(c,buf,2);
        }

        if (lock!=6)
                printk("MT2032 Fatal Error: PLLs didn't lock.\n");

        buf[0]=2;
        buf[1]=0x20; // LOGC for optimal phase noise
        ret=i2c_master_send(c,buf,2);
        if (ret!=2)
                printk("mt2032_set_if_freq2 failed with %d\n",ret);
}


static void mt2032_set_tv_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);
        int if2,from,to;

        // signal bandwidth and picture carrier
        if (t->std & V4L2_STD_525_60) {
                // NTSC
                from = 40750*1000;
                to   = 46750*1000;
                if2  = 45750*1000;
        } else {
                // PAL
                from = 32900*1000;
                to   = 39900*1000;
                if2  = 38900*1000;
        }

        mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
                           1090*1000*1000, if2, from, to);
}

static void mt2032_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);
        int if2 = t->radio_if2;

        // per Manual for FM tuning: first if center freq. 1085 MHz
        mt2032_set_if_freq(c, freq*62500 /* freq*1000*1000/16 */,
                           1085*1000*1000,if2,if2,if2);
}

// Initalization as described in "MT203x Programming Procedures", Rev 1.2, Feb.2001
static int mt2032_init(struct i2c_client *c)
{
        struct tuner *t = i2c_get_clientdata(c);
        unsigned char buf[21];
        int ret,xogc,xok=0;

        // Initialize Registers per spec.
        buf[1]=2; // Index to register 2
        buf[2]=0xff;
        buf[3]=0x0f;
        buf[4]=0x1f;
        ret=i2c_master_send(c,buf+1,4);

        buf[5]=6; // Index register 6
        buf[6]=0xe4;
        buf[7]=0x8f;
        buf[8]=0xc3;
        buf[9]=0x4e;
        buf[10]=0xec;
        ret=i2c_master_send(c,buf+5,6);

        buf[12]=13;  // Index register 13
        buf[13]=0x32;
        ret=i2c_master_send(c,buf+12,2);

        // Adjust XOGC (register 7), wait for XOK
        xogc=7;
        do {
                dprintk("mt2032: xogc = 0x%02x\n",xogc&0x07);
                mdelay(10);
                buf[0]=0x0e;
                i2c_master_send(c,buf,1);
                i2c_master_recv(c,buf,1);
                xok=buf[0]&0x01;
                dprintk("mt2032: xok = 0x%02x\n",xok);
                if (xok == 1) break;

                xogc--;
                dprintk("mt2032: xogc = 0x%02x\n",xogc&0x07);
                if (xogc == 3) {
                        xogc=4; // min. 4 per spec
                        break;
                }
                buf[0]=0x07;
                buf[1]=0x88 + xogc;
                ret=i2c_master_send(c,buf,2);
                if (ret!=2)
                        printk("mt2032_init failed with %d\n",ret);
        } while (xok != 1 );
        t->xogc=xogc;

        t->tv_freq    = mt2032_set_tv_freq;
        t->radio_freq = mt2032_set_radio_freq;
        return(1);
}

static void mt2050_set_antenna(struct i2c_client *c, unsigned char antenna)
{
       unsigned char buf[2];
       int ret;

       buf[0] = 6;
       buf[1] = antenna ? 0x11 : 0x10;
       ret=i2c_master_send(c,buf,2);
       dprintk("mt2050: enabled antenna connector %d\n", antenna);
}

static void mt2050_set_if_freq(struct i2c_client *c,unsigned int freq, unsigned int if2)
{
        unsigned int if1=1218*1000*1000;
        unsigned int f_lo1,f_lo2,lo1,lo2,f_lo1_modulo,f_lo2_modulo,num1,num2,div1a,div1b,div2a,div2b;
        int ret;
        unsigned char buf[6];

        dprintk("mt2050_set_if_freq freq=%d if1=%d if2=%d\n",
                freq,if1,if2);

        f_lo1=freq+if1;
        f_lo1=(f_lo1/1000000)*1000000;

        f_lo2=f_lo1-freq-if2;
        f_lo2=(f_lo2/50000)*50000;

        lo1=f_lo1/4000000;
        lo2=f_lo2/4000000;

        f_lo1_modulo= f_lo1-(lo1*4000000);
        f_lo2_modulo= f_lo2-(lo2*4000000);

        num1=4*f_lo1_modulo/4000000;
        num2=4096*(f_lo2_modulo/1000)/4000;

        // todo spurchecks

        div1a=(lo1/12)-1;
        div1b=lo1-(div1a+1)*12;

        div2a=(lo2/8)-1;
        div2b=lo2-(div2a+1)*8;

        if (debug > 1) {
                printk("lo1 lo2 = %d %d\n", lo1, lo2);
                printk("num1 num2 div1a div1b div2a div2b= %x %x %x %x %x %x\n",num1,num2,div1a,div1b,div2a,div2b);
        }

        buf[0]=1;
        buf[1]= 4*div1b + num1;
        if(freq<275*1000*1000) buf[1] = buf[1]|0x80;

        buf[2]=div1a;
        buf[3]=32*div2b + num2/256;
        buf[4]=num2-(num2/256)*256;
        buf[5]=div2a;
        if(num2!=0) buf[5]=buf[5]|0x40;

        if (debug > 1) {
                int i;
                printk("bufs is: ");
                for(i=0;i<6;i++)
                        printk("%x ",buf[i]);
                printk("\n");
        }

        ret=i2c_master_send(c,buf,6);
        if (ret!=6)
                printk("mt2050_set_if_freq failed with %d\n",ret);
}

static void mt2050_set_tv_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);
        unsigned int if2;

        if (t->std & V4L2_STD_525_60) {
                // NTSC
                if2 = 45750*1000;
        } else {
                // PAL
                if2 = 38900*1000;
        }
        if (V4L2_TUNER_DIGITAL_TV == t->mode) {
                // testing for DVB ...
                if2 = 36150*1000;
        }
        mt2050_set_if_freq(c, freq*62500, if2);
        mt2050_set_antenna(c, tv_antenna);
}

static void mt2050_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);
        int if2 = t->radio_if2;

        mt2050_set_if_freq(c, freq*62500, if2);
        mt2050_set_antenna(c, radio_antenna);
}

static int mt2050_init(struct i2c_client *c)
{
        struct tuner *t = i2c_get_clientdata(c);
        unsigned char buf[2];
        int ret;

        buf[0]=6;
        buf[1]=0x10;
        ret=i2c_master_send(c,buf,2); //  power

        buf[0]=0x0f;
        buf[1]=0x0f;
        ret=i2c_master_send(c,buf,2); // m1lo

        buf[0]=0x0d;
        ret=i2c_master_send(c,buf,1);
        i2c_master_recv(c,buf,1);

        dprintk("mt2050: sro is %x\n",buf[0]);
        t->tv_freq    = mt2050_set_tv_freq;
        t->radio_freq = mt2050_set_radio_freq;
        return 0;
}

static int microtune_init(struct i2c_client *c)
{
        struct tuner *t = i2c_get_clientdata(c);
        char *name;
        unsigned char buf[21];
        int company_code;

        memset(buf,0,sizeof(buf));
        t->tv_freq    = NULL;
        t->radio_freq = NULL;
        name = "unknown";

        i2c_master_send(c,buf,1);
        i2c_master_recv(c,buf,21);
        if(debug) {
                int i;
                printk(KERN_DEBUG "tuner: MT2032 hexdump:\n");
                for(i=0;i<21;i++) {
                        printk(" %02x",buf[i]);
                        if(((i+1)%8)==0) printk(" ");
                        if(((i+1)%16)==0) printk("\n ");
                }
                printk("\n ");
        }
        company_code = buf[0x11] << 8 | buf[0x12];
        printk("tuner: microtune: companycode=%04x part=%02x rev=%02x\n",
               company_code,buf[0x13],buf[0x14]);

#if 0
        /* seems to cause more problems than it solves ... */
        switch (company_code) {
        case 0x30bf:
        case 0x3cbf:
        case 0x3dbf:
        case 0x4d54:
        case 0x8e81:
        case 0x8e91:
                /* ok (?) */
                break;
        default:
                printk("tuner: microtune: unknown companycode\n");
                return 0;
        }
#endif

        if (buf[0x13] < ARRAY_SIZE(microtune_part) &&
            NULL != microtune_part[buf[0x13]])
                name = microtune_part[buf[0x13]];
        switch (buf[0x13]) {
        case MT2032:
                mt2032_init(c);
                break;
        case MT2050:
                mt2050_init(c);
                break;
        default:
                printk("tuner: microtune %s found, not (yet?) supported, sorry :-/\n",
                       name);
                return 0;
        }
        printk("tuner: microtune %s found, OK\n",name);
        return 0;
}

/* ---------------------------------------------------------------------- */

static void default_set_tv_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);
        u8 config;
        u16 div;
        struct tunertype *tun;
        unsigned char buffer[4];
        int rc;

        tun = &tuners[t->type];
        if (freq < tun->thresh1) {
                config = tun->VHF_L;
                dprintk("tv: VHF lowrange\n");
        } else if (freq < tun->thresh2) {
                config = tun->VHF_H;
                dprintk("tv: VHF high range\n");
        } else {
                config = tun->UHF;
                dprintk("tv: UHF range\n");
        }


        /* tv norm specific stuff for multi-norm tuners */
        switch (t->type) {
        case TUNER_PHILIPS_SECAM: // FI1216MF
                /* 0x01 -> ??? no change ??? */
                /* 0x02 -> PAL BDGHI / SECAM L */
                /* 0x04 -> ??? PAL others / SECAM others ??? */
                config &= ~0x02;
                if (t->std & V4L2_STD_SECAM)
                        config |= 0x02;
                break;

        case TUNER_TEMIC_4046FM5:
                config &= ~0x0f;

                if (t->std & V4L2_STD_PAL_BG) {
                        config |= TEMIC_SET_PAL_BG;

                } else if (t->std & V4L2_STD_PAL_I) {
                        config |= TEMIC_SET_PAL_I;

                } else if (t->std & V4L2_STD_PAL_DK) {
                        config |= TEMIC_SET_PAL_DK;

                } else if (t->std & V4L2_STD_SECAM_L) {
                        config |= TEMIC_SET_PAL_L;

                }
                break;

        case TUNER_PHILIPS_FQ1216ME:
                config &= ~0x0f;

                if (t->std & (V4L2_STD_PAL_BG|V4L2_STD_PAL_DK)) {
                        config |= PHILIPS_SET_PAL_BGDK;

                } else if (t->std & V4L2_STD_PAL_I) {
                        config |= PHILIPS_SET_PAL_I;

                } else if (t->std & V4L2_STD_SECAM_L) {
                        config |= PHILIPS_SET_PAL_L;

                }
                break;

        case TUNER_PHILIPS_ATSC:
                /* 0x00 -> ATSC antenna input 1 */
                /* 0x01 -> ATSC antenna input 2 */
                /* 0x02 -> NTSC antenna input 1 */
                /* 0x03 -> NTSC antenna input 2 */
                config &= ~0x03;
                if (!(t->std & V4L2_STD_ATSC))
                        config |= 2;
                /* FIXME: input */
                break;

        case TUNER_MICROTUNE_4042FI5:
                /* Set the charge pump for fast tuning */
                tun->config |= 0x40;
                break;
        }

        /*
         * Philips FI1216MK2 remark from specification :
         * for channel selection involving band switching, and to ensure
         * smooth tuning to the desired channel without causing
         * unnecessary charge pump action, it is recommended to consider
         * the difference between wanted channel frequency and the
         * current channel frequency.  Unnecessary charge pump action
         * will result in very low tuning voltage which may drive the
         * oscillator to extreme conditions.
         *
         * Progfou: specification says to send config data before
         * frequency in case (wanted frequency < current frequency).
         */

        div=freq + tun->IFPCoff;
        if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) {
                buffer[0] = tun->config;
                buffer[1] = config;
                buffer[2] = (div>>8) & 0x7f;
                buffer[3] = div      & 0xff;
        } else {
                buffer[0] = (div>>8) & 0x7f;
                buffer[1] = div      & 0xff;
                buffer[2] = tun->config;
                buffer[3] = config;
        }
        dprintk("tuner: tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
                buffer[0],buffer[1],buffer[2],buffer[3]);

        if (4 != (rc = i2c_master_send(c,buffer,4)))
                printk("tuner: i2c i/o error: rc == %d (should be 4)\n",rc);

        if (t->type == TUNER_MICROTUNE_4042FI5) {
                // FIXME - this may also work for other tuners
                unsigned long timeout = jiffies + msecs_to_jiffies(1);
                u8 status_byte = 0;

                /* Wait until the PLL locks */
                for (;;) {
                        if (time_after(jiffies,timeout))
                                return;
                        if (1 != (rc = i2c_master_recv(c,&status_byte,1))) {
                                dprintk("tuner: i2c i/o read error: rc == %d (should be 1)\n",rc);
                                break;
                        }
                        /* bit 6 is PLL locked indicator */
                        if (status_byte & 0x40)
                                break;
                        udelay(10);
                }

                /* Set the charge pump for optimized phase noise figure */
                tun->config &= ~0x40;
                buffer[0] = (div>>8) & 0x7f;
                buffer[1] = div      & 0xff;
                buffer[2] = tun->config;
                buffer[3] = config;
                dprintk("tuner: tv 0x%02x 0x%02x 0x%02x 0x%02x\n",
                        buffer[0],buffer[1],buffer[2],buffer[3]);

                if (4 != (rc = i2c_master_send(c,buffer,4)))
                        dprintk("tuner: i2c i/o error: rc == %d (should be 4)\n",rc);
        }
}

static void default_set_radio_freq(struct i2c_client *c, unsigned int freq)
{
        struct tunertype *tun;
        struct tuner *t = i2c_get_clientdata(c);
        unsigned char buffer[4];
        unsigned div;
        int rc;

        tun=&tuners[t->type];

        div = freq + (int)(16*10.7);
        buffer[2] = tun->config;

        switch (t->type) {
        case TUNER_PHILIPS_FM1216ME_MK3:
        case TUNER_PHILIPS_FM1236_MK3:
                buffer[3] = 0x19;
                break;
        case TUNER_PHILIPS_FM1256_IH3:
                div = (20 * freq)/16 + 333 * 2;
                buffer[2] = 0x80;
                buffer[3] = 0x19;
                break;
        case TUNER_LG_PAL_FM:
                buffer[3] = 0xa5;
                break;
        default:
                buffer[3] = 0xa4;
                break;
        }
        buffer[0] = (div>>8) & 0x7f;
        buffer[1] = div      & 0xff;

        dprintk("tuner: radio 0x%02x 0x%02x 0x%02x 0x%02x\n",
                buffer[0],buffer[1],buffer[2],buffer[3]);

        if (4 != (rc = i2c_master_send(c,buffer,4)))
                printk("tuner: i2c i/o error: rc == %d (should be 4)\n",rc);
}

/* ---------------------------------------------------------------------- */

// Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz
static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);

        if (t->type == UNSET) {
                printk("tuner: tuner type not set\n");
                return;
        }
        if (NULL == t->tv_freq) {
                printk("tuner: Huh? tv_set is NULL?\n");
                return;
        }
        if (freq < tv_range[0]*16 || freq > tv_range[1]*16) {
                /* FIXME: better do that chip-specific, but
                   right now we don't have that in the config
                   struct and this way is still better than no
                   check at all */
                printk("tuner: TV freq (%d.%02d) out of range (%d-%d)\n",
                       freq/16,freq%16*100/16,tv_range[0],tv_range[1]);
                return;
        }
        t->tv_freq(c,freq);
}

static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
        struct tuner *t = i2c_get_clientdata(c);

        if (t->type == UNSET) {
                printk("tuner: tuner type not set\n");
                return;
        }
        if (NULL == t->radio_freq) {
                printk("tuner: no radio tuning for this one, sorry.\n");
                return;
        }
        if (freq < radio_range[0]*16 || freq > radio_range[1]*16) {
                printk("tuner: radio freq (%d.%02d) out of range (%d-%d)\n",
                       freq/16,freq%16*100/16,
                       radio_range[0],radio_range[1]);
                return;
        }
        t->radio_freq(c,freq);
}

static void set_freq(struct i2c_client *c, unsigned long freq)
{
        struct tuner *t = i2c_get_clientdata(c);

        switch (t->mode) {
        case V4L2_TUNER_RADIO:
                dprintk("tuner: radio freq set to %lu.%02lu\n",
                        freq/16,freq%16*100/16);
                set_radio_freq(c,freq);
                break;
        case V4L2_TUNER_ANALOG_TV:
        case V4L2_TUNER_DIGITAL_TV:
                dprintk("tuner: tv freq set to %lu.%02lu\n",
                        freq/16,freq%16*100/16);
                set_tv_freq(c, freq);
                break;
        }
        t->freq = freq;
}

static void set_type(struct i2c_client *c, unsigned int type, char *source)
{
        struct tuner *t = i2c_get_clientdata(c);

        if (t->type != UNSET && t->type != TUNER_ABSENT) {
                if (t->type != type)
                        printk("tuner: type already set to %d, "
                               "ignoring request for %d\n", t->type, type);
                return;
        }
        if (type >= TUNERS)
                return;

        t->type = type;
        printk("tuner: type set to %d (%s) by %s\n",
               t->type,tuners[t->type].name, source);
        strlcpy(c->name, tuners[t->type].name, sizeof(c->name));

        switch (t->type) {
        case TUNER_MT2032:
                microtune_init(c);
                break;
        default:
                t->tv_freq    = default_set_tv_freq;
                t->radio_freq = default_set_radio_freq;
                break;
        }
}

static char pal[] = "-";
module_param_string(pal, pal, 0644, sizeof(pal));

static int tuner_fixup_std(struct tuner *t)
{
        if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
                /* get more precise norm info from insmod option */
                switch (pal[0]) {
                case 'b':
                case 'B':
                case 'g':
                case 'G':
                        dprintk("insmod fixup: PAL => PAL-BG\n");
                        t->std = V4L2_STD_PAL_BG;
                        break;
                case 'i':
                case 'I':
                        dprintk("insmod fixup: PAL => PAL-I\n");
                        t->std = V4L2_STD_PAL_I;
                        break;
                case 'd':
                case 'D':
                case 'k':
                case 'K':
                        dprintk("insmod fixup: PAL => PAL-DK\n");
                        t->std = V4L2_STD_PAL_DK;
                        break;
                }
        }
        return 0;
}

/* ---------------------------------------------------------------------- */

static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
        struct tuner *t;
        struct i2c_client *client;

        if (this_adap > 0)
                return -1;
        this_adap++;

        client_template.adapter = adap;
        client_template.addr = addr;

        printk("tuner: chip found at addr 0x%x i2c-bus %s\n",
               addr<<1, adap->name);

        if (NULL == (client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL)))
                return -ENOMEM;
        memcpy(client,&client_template,sizeof(struct i2c_client));
        t = kmalloc(sizeof(struct tuner),GFP_KERNEL);
        if (NULL == t) {
                kfree(client);
                return -ENOMEM;
        }
        memset(t,0,sizeof(struct tuner));
        i2c_set_clientdata(client, t);
        t->type       = UNSET;
        t->radio_if2  = 10700*1000; // 10.7MHz - FM radio

        i2c_attach_client(client);
        if (type < TUNERS) {
                set_type(client, type, "insmod option");
                printk("tuner: The type=<n> insmod option will go away soon.\n");
                printk("tuner: Please use the tuner=<n> option provided by\n");
                printk("tuner: tv aard core driver (bttv, saa7134, ...) instead.\n");
        }
        return 0;
}

static int tuner_probe(struct i2c_adapter *adap)
{
        if (0 != addr) {
                normal_i2c_range[0] = addr;
                normal_i2c_range[1] = addr;
        }
        this_adap = 0;

#ifdef I2C_CLASS_TV_ANALOG
        if (adap->class & I2C_CLASS_TV_ANALOG)
                return i2c_probe(adap, &addr_data, tuner_attach);
#else
        switch (adap->id) {
        case I2C_ALGO_BIT | I2C_HW_SMBUS_VOODOO3:
        case I2C_ALGO_BIT | I2C_HW_B_BT848:
        case I2C_ALGO_BIT | I2C_HW_B_RIVA:
        case I2C_ALGO_SAA7134:
        case I2C_ALGO_SAA7146:
                return i2c_probe(adap, &addr_data, tuner_attach);
                break;
        }
#endif
        return 0;
}

static int tuner_detach(struct i2c_client *client)
{
        struct tuner *t = i2c_get_clientdata(client);

        i2c_detach_client(client);
        kfree(t);
        kfree(client);
        return 0;
}

#define SWITCH_V4L2     if (!t->using_v4l2 && debug) \
                          printk("tuner: switching to v4l2\n"); \
                          t->using_v4l2 = 1;
#define CHECK_V4L2      if (t->using_v4l2) { if (debug) \
                          printk("tuner: ignore v4l1 call\n"); \
                          return 0; }

static int
tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
        struct tuner *t = i2c_get_clientdata(client);
        unsigned int *iarg = (int*)arg;

        switch (cmd) {

        /* --- configuration --- */
        case TUNER_SET_TYPE:
                set_type(client,*iarg,client->adapter->name);
                break;
        case AUDC_SET_RADIO:
                if (V4L2_TUNER_RADIO != t->mode) {
                        set_tv_freq(client,400 * 16);
                        t->mode = V4L2_TUNER_RADIO;
                }
                break;
        case AUDC_CONFIG_PINNACLE:
                switch (*iarg) {
                case 2:
                        dprintk("tuner: pinnacle pal\n");
                        t->radio_if2 = 33300 * 1000;
                        break;
                case 3:
                        dprintk("tuner: pinnacle ntsc\n");
                        t->radio_if2 = 41300 * 1000;
                        break;
                }
                break;

        /* --- v4l ioctls --- */
        /* take care: bttv does userspace copying, we'll get a
           kernel pointer here... */
        case VIDIOCSCHAN:
        {
                static const v4l2_std_id map[] = {
                        [ VIDEO_MODE_PAL   ] = V4L2_STD_PAL,
                        [ VIDEO_MODE_NTSC  ] = V4L2_STD_NTSC_M,
                        [ VIDEO_MODE_SECAM ] = V4L2_STD_SECAM,
                        [ 4 /* bttv */     ] = V4L2_STD_PAL_M,
                        [ 5 /* bttv */     ] = V4L2_STD_PAL_N,
                        [ 6 /* bttv */     ] = V4L2_STD_NTSC_M_JP,
                };
                struct video_channel *vc = arg;

                CHECK_V4L2;
                t->mode = V4L2_TUNER_ANALOG_TV;
                if (vc->norm < ARRAY_SIZE(map))
                        t->std = map[vc->norm];
                tuner_fixup_std(t);
                if (t->freq)
                        set_tv_freq(client,t->freq);
                return 0;
        }
        case VIDIOCSFREQ:
        {
                unsigned long *v = arg;

                CHECK_V4L2;
                set_freq(client,*v);
                return 0;
        }
        case VIDIOCGTUNER:
        {
                struct video_tuner *vt = arg;

                CHECK_V4L2;
                if (V4L2_TUNER_RADIO == t->mode)
                        vt->signal = tuner_signal(client);
                return 0;
        }
        case VIDIOCGAUDIO:
        {
                struct video_audio *va = arg;

                CHECK_V4L2;
                if (V4L2_TUNER_RADIO == t->mode)
                        va->mode = (tuner_stereo(client) ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO);
                return 0;
        }

        case VIDIOC_S_STD:
        {
                v4l2_std_id *id = arg;

                SWITCH_V4L2;
                t->mode = V4L2_TUNER_ANALOG_TV;
                t->std = *id;
                tuner_fixup_std(t);
                if (t->freq)
                        set_freq(client,t->freq);
                break;
        }
        case VIDIOC_S_FREQUENCY:
        {
                struct v4l2_frequency *f = arg;

                SWITCH_V4L2;
                if (V4L2_TUNER_RADIO == f->type &&
                    V4L2_TUNER_RADIO != t->mode)
                        set_tv_freq(client,400*16);
                t->mode  = f->type;
                t->freq  = f->frequency;
                set_freq(client,t->freq);
                break;
        }
        case VIDIOC_G_TUNER:
        {
                struct v4l2_tuner *tuner = arg;

                SWITCH_V4L2;
                if (V4L2_TUNER_RADIO == t->mode)
                        tuner->signal = tuner_signal(client);
                break;
        }
        default:
                /* nothing */
                break;
        }

        return 0;
}

static int tuner_suspend(struct device * dev, u32 state, u32 level)
{
        dprintk("tuner: suspend\n");
        /* FIXME: power down ??? */
        return 0;
}

static int tuner_resume(struct device * dev, u32 level)
{
        struct i2c_client *c = container_of(dev, struct i2c_client, dev);
        struct tuner *t = i2c_get_clientdata(c);

        dprintk("tuner: resume\n");
        if (t->freq)
                set_freq(c,t->freq);
        return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver driver = {
        .owner          = THIS_MODULE,
        .name           = "i2c TV tuner driver",
        .id             = I2C_DRIVERID_TUNER,
        .flags          = I2C_DF_NOTIFY,
        .attach_adapter = tuner_probe,
        .detach_client  = tuner_detach,
        .command        = tuner_command,
        .driver = {
                .suspend = tuner_suspend,
                .resume  = tuner_resume,
        },
};
static struct i2c_client client_template =
{
        I2C_DEVNAME("(tuner unset)"),
        .flags      = I2C_CLIENT_ALLOW_USE,
        .driver     = &driver,
};

static int __init tuner_init_module(void)
{
        return i2c_add_driver(&driver);
}

static void __exit tuner_cleanup_module(void)
{
        i2c_del_driver(&driver);
}

module_init(tuner_init_module);
module_exit(tuner_cleanup_module);

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */