tda9887.c

该代码是天敏电视卡天敏大师4的核心芯片在linux下面的驱动

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
#include "audiochip.h"
#include "id.h"
#include "i2c-compat.h"
#else
#include <media/audiochip.h>
#include <media/id.h>
#endif

/* Chips:
   TDA9885 (PAL, NTSC)
   TDA9886 (PAL, SECAM, NTSC)
   TDA9887 (PAL, SECAM, NTSC, FM Radio)

   found on:
   - Pinnacle PCTV (Jul.2002 Version with MT2032, bttv)
      TDA9887 (world), TDA9885 (USA)
      Note: OP2 of tda988x must be set to 1, else MT2032 is disabled!
   - KNC One TV-Station RDS (saa7134)
*/


/* Addresses to scan */
static unsigned short normal_i2c[] = {
	0x86 >>1,
	0x96 >>1,
	I2C_CLIENT_END,
};
static unsigned short normal_i2c_range[] = {I2C_CLIENT_END,I2C_CLIENT_END};
I2C_CLIENT_INSMOD;

/* insmod options */
static int debug =  0;
static char *pal =  "b";
static char *secam =  "l";
MODULE_PARM(debug,"i");
MODULE_PARM(pal,"s");
MODULE_PARM(secam,"s");
MODULE_LICENSE("GPL");

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

#define dprintk     if (debug) printk

struct tda9887 {
	struct i2c_client client;
	int radio,tvnorm;
	int pinnacle_id;
};

static struct i2c_driver driver;
static struct i2c_client client_template;

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

//
// TDA defines
//

//// first reg
#define cVideoTrapBypassOFF     0x00    // bit b0
#define cVideoTrapBypassON      0x01    // bit b0

#define cAutoMuteFmInactive     0x00    // bit b1
#define cAutoMuteFmActive       0x02    // bit b1

#define cIntercarrier           0x00    // bit b2
#define cQSS                    0x04    // bit b2

#define cPositiveAmTV           0x00    // bit b3:4
#define cFmRadio                0x08    // bit b3:4
#define cNegativeFmTV           0x10    // bit b3:4


#define cForcedMuteAudioON      0x20    // bit b5
#define cForcedMuteAudioOFF     0x00    // bit b5

#define cOutputPort1Active      0x00    // bit b6
#define cOutputPort1Inactive    0x40    // bit b6

#define cOutputPort2Active      0x00    // bit b7
#define cOutputPort2Inactive    0x80    // bit b7


//// second reg
#define cDeemphasisOFF          0x00    // bit c5
#define cDeemphasisON           0x20    // bit c5

#define cDeemphasis75           0x00    // bit c6
#define cDeemphasis50           0x40    // bit c6

#define cAudioGain0             0x00    // bit c7
#define cAudioGain6             0x80    // bit c7


//// third reg
#define cAudioIF_4_5             0x00    // bit e0:1
#define cAudioIF_5_5             0x01    // bit e0:1
#define cAudioIF_6_0             0x02    // bit e0:1
#define cAudioIF_6_5             0x03    // bit e0:1


#define cVideoIF_58_75           0x00    // bit e2:4
#define cVideoIF_45_75           0x04    // bit e2:4
#define cVideoIF_38_90           0x08    // bit e2:4
#define cVideoIF_38_00           0x0C    // bit e2:4
#define cVideoIF_33_90           0x10    // bit e2:4
#define cVideoIF_33_40           0x14    // bit e2:4
#define cRadioIF_45_75           0x18    // bit e2:4
#define cRadioIF_38_90           0x1C    // bit e2:4


#define cTunerGainNormal         0x00    // bit e5
#define cTunerGainLow            0x20    // bit e5

#define cGating_18               0x00    // bit e6
#define cGating_36               0x40    // bit e6

#define cAgcOutON                0x80    // bit e7
#define cAgcOutOFF               0x00    // bit e7

static int tda9887_miro(struct tda9887 *t)
{
	int rc;
	u8   bData[4]     = { 0 };
	u8   bVideoIF     = 0;
	u8   bAudioIF     = 0;
	u8   bDeEmphasis  = 0;
	u8   bDeEmphVal   = 0;
	u8   bModulation  = 0;
	u8   bCarrierMode = 0;
	u8   bOutPort1    = cOutputPort1Inactive;
#if 0
	u8   bOutPort2    = cOutputPort2Inactive & mbTADState; // store i2c tuner state
#else
	u8   bOutPort2    = cOutputPort2Inactive;
#endif
	u8   bVideoTrap   = cVideoTrapBypassOFF;
#if 1
	u8   bTopAdjust   = 0x0e /* -2dB */;
#else
	u8   bTopAdjust   = 0;
#endif

#if 0
	if (mParams.fVideoTrap)
		bVideoTrap   = cVideoTrapBypassON;
#endif

	if (t->radio) {
		bVideoTrap   = cVideoTrapBypassOFF;
		bCarrierMode = cQSS;
		bModulation  = cFmRadio;
		bOutPort1    = cOutputPort1Inactive;
		bDeEmphasis  = cDeemphasisON;
		if (3 == t->pinnacle_id) {
			/* ntsc */
			bDeEmphVal   = cDeemphasis75;
			bAudioIF     = cAudioIF_4_5;
			bVideoIF     = cRadioIF_45_75;
		} else {
			/* pal */
			bAudioIF     = cAudioIF_5_5;
			bVideoIF     = cRadioIF_38_90;
			bDeEmphVal   = cDeemphasis50;
		}

	} else if (t->tvnorm == VIDEO_MODE_PAL) {
		bDeEmphasis  = cDeemphasisON;
		bDeEmphVal   = cDeemphasis50;
		bModulation  = cNegativeFmTV;
		bOutPort1    = cOutputPort1Inactive;
		if ((1 == t->pinnacle_id) || (7 == t->pinnacle_id)) {
			bCarrierMode = cIntercarrier;
		} else {
			// stereo boards
			bCarrierMode = cQSS;
		}
		switch (pal[0]) {
		case 'b':
		case 'g':
		case 'h':
			bVideoIF     = cVideoIF_38_90;
			bAudioIF     = cAudioIF_5_5;
			break;
		case 'd':
			bVideoIF     = cVideoIF_38_00;
			bAudioIF     = cAudioIF_6_5;
			break;
		case 'i':
			bVideoIF     = cVideoIF_38_90;
			bAudioIF     = cAudioIF_6_0;
			break;
		case 'm':
		case 'n':
			bVideoIF     = cVideoIF_45_75;
			bAudioIF     = cAudioIF_4_5;
			bDeEmphVal   = cDeemphasis75;
			if ((5 == t->pinnacle_id) || (6 == t->pinnacle_id)) {
				bCarrierMode = cIntercarrier;
			} else {
				bCarrierMode = cQSS;
			}
			break;
		}

	} else if (t->tvnorm == VIDEO_MODE_SECAM) {
		bAudioIF     = cAudioIF_6_5;
		bDeEmphasis  = cDeemphasisON;
		bDeEmphVal   = cDeemphasis50;
		bModulation  = cNegativeFmTV;
		bCarrierMode = cQSS;
		bOutPort1    = cOutputPort1Inactive;                
		switch (secam[0]) {
		case 'd':
			bVideoIF     = cVideoIF_38_00;
			break;
		case 'k':
			bVideoIF     = cVideoIF_38_90;
			break;
		case 'l':
			bVideoIF     = cVideoIF_38_90;
			bDeEmphasis  = cDeemphasisOFF;
			bDeEmphVal   = cDeemphasis75;
			bModulation  = cPositiveAmTV;
			break;
		case 'L' /* L1 */:
			bVideoIF     = cVideoIF_33_90;
			bDeEmphasis  = cDeemphasisOFF;
			bDeEmphVal   = cDeemphasis75;
			bModulation  = cPositiveAmTV;
			break;
		}

	} else if (t->tvnorm == VIDEO_MODE_NTSC) {
                bVideoIF     = cVideoIF_45_75;
                bAudioIF     = cAudioIF_4_5;
                bDeEmphasis  = cDeemphasisON;
                bDeEmphVal   = cDeemphasis75;
                bModulation  = cNegativeFmTV;                
                bOutPort1    = cOutputPort1Inactive;
                if ((5 == t->pinnacle_id) || (6 == t->pinnacle_id)) {
			bCarrierMode = cIntercarrier;
		} else {
			bCarrierMode = cQSS;
                }
	}

	bData[1] = bVideoTrap        |  // B0: video trap bypass
		cAutoMuteFmInactive  |  // B1: auto mute
		bCarrierMode         |  // B2: InterCarrier for PAL else QSS 
		bModulation          |  // B3 - B4: positive AM TV for SECAM only
		cForcedMuteAudioOFF  |  // B5: forced Audio Mute (off)
		bOutPort1            |  // B6: Out Port 1 
		bOutPort2;              // B7: Out Port 2 
	bData[2] = bTopAdjust |   // C0 - C4: Top Adjust 0 == -16dB  31 == 15dB
		bDeEmphasis   |   // C5: De-emphasis on/off
		bDeEmphVal    |   // C6: De-emphasis 50/75 microsec
		cAudioGain0;      // C7: normal audio gain
	bData[3] = bAudioIF      |  // E0 - E1: Sound IF
		bVideoIF         |  // E2 - E4: Video IF
		cTunerGainNormal |  // E5: Tuner gain (normal)
		cGating_18       |  // E6: Gating (18%)
		cAgcOutOFF;         // E7: VAGC  (off)
	
	dprintk("tda9885/6/7: 0x%02x 0x%02x 0x%02x [pinnacle_id=%d]\n",
		bData[1],bData[2],bData[3],t->pinnacle_id);
	if (4 != (rc = i2c_master_send(&t->client,bData,4)))
		printk("tda9885/6/7: i2c i/o error: rc == %d (should be 4)\n",rc);
	return 0;
}

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

static unsigned char buf_pal_bg[]    = { 0x00, 0xd4, 0x70, 0x09 };
static unsigned char buf_pal_i[]     = { 0x00, 0xd4, 0x70, 0x0a };
static unsigned char buf_pal_dk[]    = { 0x00, 0xd4, 0x70, 0x0b };
static unsigned char buf_pal_l[]     = { 0x00, 0xc4, 0x10, 0x0b };
//static unsigned char buf_pal_l2[]    = { 0x00, 0x84, 0x10, 0x13 };

static unsigned char buf_ntsc[]	     = { 0x00, 0x96, 0x70, 0x44 };
static unsigned char buf_ntsc_jp[]   = { 0x00, 0x96, 0x70, 0x40 };

//static unsigned char buf_fm_mono[]   = { 0x00, 0xdc, 0x70, 0x1d };
static unsigned char buf_fm_stereo[] = { 0x00, 0xdc, 0x10, 0x1d };

static int tda9887_configure(struct tda9887 *t)
{
	unsigned char *buf = NULL;
	int rc;

	if (t->radio) {
		dprintk("tda9885/6/7: FM Radio mode\n");
		buf = buf_fm_stereo;

	} else if (t->tvnorm == VIDEO_MODE_PAL) {
		dprintk("tda9885/6/7: PAL-%c mode\n",pal[0]);
		switch (pal[0]) {
		case 'b':
		case 'g':
			buf = buf_pal_bg;
			break;
		case 'i':
			buf = buf_pal_i;
			break;
		case 'd':
		case 'k':
			buf = buf_pal_dk;
			break;
		case 'l':
			buf = buf_pal_l;
			break;
		}

	} else if (t->tvnorm == VIDEO_MODE_NTSC) {
		dprintk("tda9885/6/7: NTSC mode\n");
		buf = buf_ntsc;

	} else if (t->tvnorm == VIDEO_MODE_SECAM) {
		dprintk("tda9885/6/7: SECAM mode\n");
                buf = buf_pal_l;

        } else if (t->tvnorm == 6 /* BTTV hack */) {
		dprintk("tda9885/6/7: NTSC-Japan mode\n");
                buf = buf_ntsc_jp;
        }

	if (NULL == buf) {
		printk("tda9885/6/7 unknown norm=%d\n",t->tvnorm);
		return 0;
	}

	dprintk("tda9885/6/7: 0x%02x 0x%02x 0x%02x\n",
		buf[1],buf[2],buf[3]);
        if (4 != (rc = i2c_master_send(&t->client,buf,4)))
                printk("tda9885/6/7: i2c i/o error: rc == %d (should be 4)\n",rc);
	return 0;
}

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

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int tda9887_attach(struct i2c_adapter *adap, int addr, int kind)
#else
static int tda9887_attach(struct i2c_adapter *adap, int addr,
			  unsigned short flags, int kind)
#endif
{
	struct tda9887 *t;

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

        printk("tda9887: chip found @ 0x%x\n", addr<<1);

        if (NULL == (t = kmalloc(sizeof(*t), GFP_KERNEL)))
                return -ENOMEM;
	memset(t,0,sizeof(*t));
	t->client = client_template;
	t->pinnacle_id = -1;
	t->tvnorm=VIDEO_MODE_PAL;
        i2c_set_clientdata(&t->client, t);
        i2c_attach_client(&t->client);
        
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_INC_USE_COUNT;
#endif
	return 0;
}

static int tda9887_probe(struct i2c_adapter *adap)
{
#ifdef I2C_ADAP_CLASS_TV_ANALOG
	if (adap->class & I2C_ADAP_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tda9887_attach);
#else
	switch (adap->id) {
	case I2C_ALGO_BIT | I2C_HW_B_BT848:
	case I2C_ALGO_BIT | I2C_HW_B_RIVA:
	case I2C_ALGO_SAA7134:
		return i2c_probe(adap, &addr_data, tda9887_attach);
		break;
	}
#endif
	return 0;
}

static int tda9887_detach(struct i2c_client *client)
{
	struct tda9887 *t = i2c_get_clientdata(client);

	i2c_detach_client(client);
	kfree(t);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_DEC_USE_COUNT;
#endif
	return 0;
}

static int
tda9887_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct tda9887 *t = i2c_get_clientdata(client);

        switch (cmd) {

	/* --- configuration --- */
	case AUDC_SET_RADIO:
		t->radio = 1;
		if (-1 != t->pinnacle_id)
			tda9887_miro(t);
		else
			tda9887_configure(t);
		break;
		
	case AUDC_CONFIG_PINNACLE:
	{
		int *i = arg;

		t->pinnacle_id = *i;
		tda9887_miro(t);
		break;
	}
	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
	case VIDIOCSCHAN:
	{
		struct video_channel *vc = arg;

		t->radio  = 0;
		t->tvnorm = vc->norm;
		if (-1 != t->pinnacle_id)
			tda9887_miro(t);
		else
			tda9887_configure(t);
		break;
	}
	default:
		/* nothing */
		break;
	}
	return 0;
}

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

static struct i2c_driver driver = {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,54)
	.owner          = THIS_MODULE,
#endif
        .name           = "i2c tda9887 driver",
        .id             = -1, /* FIXME */
        .flags          = I2C_DF_NOTIFY,
        .attach_adapter = tda9887_probe,
        .detach_client  = tda9887_detach,
        .command        = tda9887_command,
};
static struct i2c_client client_template =
{
	I2C_DEVNAME("tda9887"),
	.flags     = I2C_CLIENT_ALLOW_USE,
        .driver    = &driver,
};

static int tda9887_init_module(void)
{
	i2c_add_driver(&driver);
	return 0;
}

static void tda9887_cleanup_module(void)
{
	i2c_del_driver(&driver);
}

module_init(tda9887_init_module);
module_exit(tda9887_cleanup_module);

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