tuner-core.c

V4l driver for DVB HD

		return -ENOMEM;
	memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
	i2c_set_clientdata(&t->i2c, t);
	t->type = UNSET;
	t->radio_if2 = 10700 * 1000;	/* 10.7MHz - FM radio */
	t->audmode = V4L2_TUNER_MODE_STEREO;
	t->mode_mask = T_UNINITIALIZED;
	if (tuner_debug_old) {
		tuner_debug = tuner_debug_old;
		printk(KERN_ERR "tuner: tuner_debug is deprecated and will be removed in 2.6.17.\n");
		printk(KERN_ERR "tuner: use the debug option instead.\n");
	}

	if (show_i2c) {
		unsigned char buffer[16];
		int i,rc;

		memset(buffer, 0, sizeof(buffer));
		rc = i2c_master_recv(&t->i2c, buffer, sizeof(buffer));
		tuner_info("I2C RECV = ");
		for (i=0;i<rc;i++)
			printk("%02x ",buffer[i]);
		printk("\n");
	}
	/* autodetection code based on the i2c addr */
	if (!no_autodetect) {
		switch (addr) {
		case 0x42:
		case 0x43:
		case 0x4a:
		case 0x4b:
			/* If chip is not tda8290, don't register.
			   since it can be tda9887*/
			if (tda8290_probe(&t->i2c) != 0) {
				tuner_dbg("chip at addr %x is not a tda8290\n", addr);
				kfree(t);
				return 0;
			}
			break;
		case 0x60:
			if (tea5767_autodetection(&t->i2c) != EINVAL) {
				t->type = TUNER_TEA5767;
				t->mode_mask = T_RADIO;
				t->mode = T_STANDBY;
				t->radio_freq = 87.5 * 16000; /* Sets freq to FM range */
				default_mode_mask &= ~T_RADIO;

				goto register_client;
			}
			break;
		}
	}

	/* Initializes only the first adapter found */
	if (default_mode_mask != T_UNINITIALIZED) {
		tuner_dbg ("Setting mode_mask to 0x%02x\n", default_mode_mask);
		t->mode_mask = default_mode_mask;
		t->tv_freq = 400 * 16; /* Sets freq to VHF High */
		t->radio_freq = 87.5 * 16000; /* Sets freq to FM range */
		default_mode_mask = T_UNINITIALIZED;
	}

	/* Should be just before return */
register_client:
	tuner_info("chip found @ 0x%x (%s)\n", addr << 1, adap->name);
	i2c_attach_client (&t->i2c);
	set_type (&t->i2c,t->type, t->mode_mask);
#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[0] = addr;
		normal_i2c[1] = I2C_CLIENT_END;
	}

	default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;

#ifdef I2C_CLASS_TV_ANALOG
	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tuner_attach);
#else
	if (adap->id == I2C_HW_B_BT848)
		return i2c_probe(adap, &addr_data, tuner_attach);
#endif
	return 0;
}

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

	err = i2c_detach_client(&t->i2c);
	if (err) {
		tuner_warn
		    ("Client deregistration failed, client not detached.\n");
		return err;
	}

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

/*
 * Switch tuner to other mode. If tuner support both tv and radio,
 * set another frequency to some value (This is needed for some pal
 * tuners to avoid locking). Otherwise, just put second tuner in
 * standby mode.
 */

static inline int set_mode(struct i2c_client *client, struct tuner *t, int mode, char *cmd)
{
	if (mode == t->mode)
		return 0;

	t->mode = mode;

	if (check_mode(t, cmd) == EINVAL) {
		t->mode = T_STANDBY;
		if (t->standby)
			t->standby (client);
		return EINVAL;
	}
	return 0;
}

#define switch_v4l2()	if (!t->using_v4l2) \
			    tuner_dbg("switching to v4l2\n"); \
			t->using_v4l2 = 1;

static inline int check_v4l2(struct tuner *t)
{
	/* bttv still uses both v4l1 and v4l2 calls to the tuner (v4l2 for
	   TV, v4l1 for radio), until that is fixed this code is disabled.
	   Otherwise the radio (v4l1) wouldn't tune after using the TV (v4l2)
	   first. */
#if 0
	if (t->using_v4l2) {
		tuner_dbg ("ignore v4l1 call\n");
		return EINVAL;
	}
#endif
	return 0;
}

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

	if (tuner_debug>1)
		v4l_i2c_print_ioctl(&(t->i2c),cmd);

	switch (cmd) {
	/* --- configuration --- */
	case TUNER_SET_TYPE_ADDR:
		tuner_dbg ("Calling set_type_addr for type=%d, addr=0x%02x, mode=0x%02x\n",
				((struct tuner_setup *)arg)->type,
				((struct tuner_setup *)arg)->addr,
				((struct tuner_setup *)arg)->mode_mask);

		set_addr(client, (struct tuner_setup *)arg);
		break;
	case AUDC_SET_RADIO:
		if (set_mode(client, t, V4L2_TUNER_RADIO, "AUDC_SET_RADIO")
				== EINVAL)
			return 0;
		if (t->radio_freq)
			set_freq(client, t->radio_freq);
		break;
	case TUNER_SET_STANDBY:
		if (check_mode(t, "TUNER_SET_STANDBY") == EINVAL)
			return 0;
		if (t->standby)
			t->standby (client);
		break;
	case VIDIOCSAUDIO:
		if (check_mode(t, "VIDIOCSAUDIO") == EINVAL)
			return 0;
		if (check_v4l2(t) == EINVAL)
			return 0;

		/* Should be implemented, since bttv calls it */
		tuner_dbg("VIDIOCSAUDIO not implemented.\n");
		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;

			if (check_v4l2(t) == EINVAL)
				return 0;

			if (set_mode(client,t,V4L2_TUNER_ANALOG_TV, "VIDIOCSCHAN")==EINVAL)
				return 0;

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

			if (check_mode(t, "VIDIOCSFREQ") == EINVAL)
				return 0;
			if (check_v4l2(t) == EINVAL)
				return 0;

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

			if (check_mode(t, "VIDIOCGTUNER") == EINVAL)
				return 0;
			if (check_v4l2(t) == EINVAL)
				return 0;

			if (V4L2_TUNER_RADIO == t->mode) {
				if (t->has_signal)
					vt->signal = t->has_signal(client);
				if (t->is_stereo) {
					if (t->is_stereo(client))
						vt->flags |=
						    VIDEO_TUNER_STEREO_ON;
					else
						vt->flags &=
						    ~VIDEO_TUNER_STEREO_ON;
				}
				vt->flags |= VIDEO_TUNER_LOW;	/* Allow freqs at 62.5 Hz */

				vt->rangelow = radio_range[0] * 16000;
				vt->rangehigh = radio_range[1] * 16000;

			} else {
				vt->rangelow = tv_range[0] * 16;
				vt->rangehigh = tv_range[1] * 16;
			}

			return 0;
		}
	case VIDIOCGAUDIO:
		{
			struct video_audio *va = arg;

			if (check_mode(t, "VIDIOCGAUDIO") == EINVAL)
				return 0;
			if (check_v4l2(t) == EINVAL)
				return 0;

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

	case VIDIOC_S_STD:
		{
			v4l2_std_id *id = arg;

			if (set_mode (client, t, V4L2_TUNER_ANALOG_TV, "VIDIOC_S_STD")
					== EINVAL)
				return 0;

			switch_v4l2();

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

			switch_v4l2();
			if ((V4L2_TUNER_RADIO == f->type && V4L2_TUNER_RADIO != t->mode)
				|| (V4L2_TUNER_DIGITAL_TV == f->type
					&& V4L2_TUNER_DIGITAL_TV != t->mode)) {
				if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
					    == EINVAL)
					return 0;
			}
			set_freq(client,f->frequency);

			break;
		}
	case VIDIOC_G_FREQUENCY:
		{
			struct v4l2_frequency *f = arg;

			if (check_mode(t, "VIDIOC_G_FREQUENCY") == EINVAL)
				return 0;
			switch_v4l2();
			f->type = t->mode;
			f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
				t->radio_freq : t->tv_freq;
			break;
		}
	case VIDIOC_G_TUNER:
		{
			struct v4l2_tuner *tuner = arg;

			if (check_mode(t, "VIDIOC_G_TUNER") == EINVAL)
				return 0;
			switch_v4l2();

			tuner->type = t->mode;
			if (t->mode == V4L2_TUNER_ANALOG_TV)
				tuner->capability |= V4L2_TUNER_CAP_NORM;
			if (t->mode != V4L2_TUNER_RADIO) {
				tuner->rangelow = tv_range[0] * 16;
				tuner->rangehigh = tv_range[1] * 16;
				break;
			}

			/* radio mode */
			if (t->has_signal)
				tuner->signal = t->has_signal(client);

			tuner->rxsubchans =
				V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
			if (t->is_stereo) {
				tuner->rxsubchans = t->is_stereo(client) ?
					V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
			}

			tuner->capability |=
			    V4L2_TUNER_CAP_LOW | V4L2_TUNER_CAP_STEREO;
			tuner->audmode = t->audmode;
			tuner->rangelow = radio_range[0] * 16000;
			tuner->rangehigh = radio_range[1] * 16000;
			break;
		}
	case VIDIOC_S_TUNER:
		{
			struct v4l2_tuner *tuner = arg;

			if (check_mode(t, "VIDIOC_S_TUNER") == EINVAL)
				return 0;

			switch_v4l2();

			/* do nothing unless we're a radio tuner */
			if (t->mode != V4L2_TUNER_RADIO)
				break;
			t->audmode = tuner->audmode;
			set_radio_freq(client, t->radio_freq);
			break;
		}
	case VIDIOC_LOG_STATUS:
		tuner_status(client);
		break;
	}

	return 0;
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,14)
static int tuner_suspend(struct device *dev, pm_message_t state)
#else
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,13)
static int tuner_suspend(struct device *dev, pm_message_t state, u32 level)
#else
static int tuner_suspend(struct device *dev, u32 state, u32 level)
#endif
#endif
{
	struct i2c_client *c = container_of (dev, struct i2c_client, dev);
	struct tuner *t = i2c_get_clientdata (c);

	tuner_dbg ("suspend\n");
	/* FIXME: power down ??? */
	return 0;
}

#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,14)
static int tuner_resume(struct device *dev)
#else
static int tuner_resume(struct device *dev, u32 level)
#endif
{
	struct i2c_client *c = container_of (dev, struct i2c_client, dev);
	struct tuner *t = i2c_get_clientdata (c);

	tuner_dbg ("resume\n");
	if (V4L2_TUNER_RADIO == t->mode) {
		if (t->radio_freq)
			set_freq(c, t->radio_freq);
	} else {
		if (t->tv_freq)
			set_freq(c, t->tv_freq);
	}
	return 0;
}
#endif

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

static struct i2c_driver driver = {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0))&&(LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15))
	.owner = THIS_MODULE,
#endif
#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
	.name = "tuner",
	.flags = I2C_DF_NOTIFY,
#endif
	.id = I2C_DRIVERID_TUNER,
	.attach_adapter = tuner_probe,
	.detach_client = tuner_detach,
	.command = tuner_command,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
	.driver = {
#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15)
		.name    = "tuner",
#endif
		.suspend = tuner_suspend,
		.resume  = tuner_resume,
	},
#endif
};
static struct i2c_client client_template = {
	.name = "(tuner unset)",
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15)
	.flags = I2C_CLIENT_ALLOW_USE,
#endif
	.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:
 */