tuner.c

saa7134-0.2.9.tar.gz 电视卡驱动程序

			break;
		case 'd':
		case 'D':
			config |= TEMIC_SET_PAL_DK;
			break;
		case 'l':
		case 'L':
			config |= TEMIC_SET_PAL_L;
			break;
		case 'b':
		case 'B':
		case 'g':
		case 'G':
		default:
			config |= TEMIC_SET_PAL_BG;
			break;
		}
		break;

	case TUNER_PHILIPS_FQ1216ME:
		config &= ~0x0f;
		switch (pal[0]) {
		case 'i':
		case 'I':
			config |= PHILIPS_SET_PAL_I;
			break;
		case 'l':
		case 'L':
			config |= PHILIPS_SET_PAL_L;
			break;
		case 'd':
		case 'D':
		case 'b':
		case 'B':
		case 'g':
		case 'G':
			config |= PHILIPS_SET_PAL_BGDK;
			break;
		}
		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;
#ifdef VIDEO_MODE_ATSC
		if (VIDEO_MODE_ATSC != t->mode)
			config |= 2;
#endif
		/* FIXME: input */
		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);

}

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[0] = (div>>8) & 0x7f;
        buffer[1] = div      & 0xff;
	buffer[2] = tun->config;
	switch (t->type) {
	case TUNER_PHILIPS_FM1216ME_MK3:
		buffer[3] = 0x19;
		break;
	default:
		buffer[3] = 0xa4;
		break;
	}

	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_type(struct i2c_client *c, unsigned int type)
{
	struct tuner *t = i2c_get_clientdata(c);

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

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

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

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
#else
static int tuner_attach(struct i2c_adapter *adap, int addr,
			unsigned short flags, int kind)
#endif
{
	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 @ 0x%x\n", addr<<1);

        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) {
		printk("tuner: type forced to %d (%s) [insmod]\n",
		       t->type,tuners[t->type].name);
		set_type(client,type);
	}
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_INC_USE_COUNT;
#endif
	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_ADAP_CLASS_TV_ANALOG
	if (adap->class & I2C_ADAP_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tuner_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:
	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);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_DEC_USE_COUNT;
#endif
	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);
		break;
	case AUDC_SET_RADIO:
		if (!t->radio) {
			set_tv_freq(client,400 * 16);
			t->radio = 1;
		}
		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:
	{
		struct video_channel *vc = arg;

		t->radio = 0;
		t->mode = vc->norm;
		if (t->freq)
			set_tv_freq(client,t->freq);
		return 0;
	}
	case VIDIOCSFREQ:
	{
		unsigned long *v = arg;

		if (t->radio) {
			dprintk("tuner: radio freq set to %lu.%02lu\n",
				(*v)/16,(*v)%16*100/16);
			set_radio_freq(client,*v);
		} else {
			dprintk("tuner: tv freq set to %lu.%02lu\n",
				(*v)/16,(*v)%16*100/16);
			set_tv_freq(client,*v);
		}
		t->freq = *v;
		return 0;
	}
	case VIDIOCGTUNER:
	{
		struct video_tuner *vt = arg;

		if (t->radio)
			vt->signal = tuner_signal(client);
		return 0;
	}
	case VIDIOCGAUDIO:
	{
		struct video_audio *va = arg;
		if (t->radio)
			va->mode = (tuner_stereo(client) ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO);
		return 0;
	}
	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 TV tuner driver",
        .id             = I2C_DRIVERID_TUNER,
        .flags          = I2C_DF_NOTIFY,
        .attach_adapter = tuner_probe,
        .detach_client  = tuner_detach,
        .command        = tuner_command,
};
static struct i2c_client client_template =
{
	I2C_DEVNAME("(tuner unset)"),
	.flags      = I2C_CLIENT_ALLOW_USE,
        .driver     = &driver,
};

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

static void 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:
 */