tuner-core.c

linux 内核源代码

			tuner_info("Stereo:          yes\n");
	}
	if (t->ops.has_signal) {
		tuner_info("Signal strength: %d\n", t->ops.has_signal(t));
	}
	if (t->ops.is_stereo) {
		tuner_info("Stereo:          %s\n", t->ops.is_stereo(t) ? "yes" : "no");
	}
}

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

/* static vars: used only in tuner_attach and tuner_probe */
static unsigned default_mode_mask;

/* During client attach, set_type is called by adapter's attach_inform callback.
   set_type must then be completed by tuner_attach.
 */
static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct tuner *t;

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

	t = kzalloc(sizeof(struct tuner), GFP_KERNEL);
	if (NULL == t)
		return -ENOMEM;
	memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
	i2c_set_clientdata(&t->i2c, t);
	t->type = UNSET;
	t->audmode = V4L2_TUNER_MODE_STEREO;
	t->mode_mask = T_UNINITIALIZED;
	t->ops.tuner_status = tuner_status;

	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");
	}
	/* HACK: This test were added to avoid tuner to probe tda9840 and tea6415c on the MXB card */
	if (adap->id == I2C_HW_SAA7146 && addr < 0x4a)
		return -ENODEV;

	/* autodetection code based on the i2c addr */
	if (!no_autodetect) {
		switch (addr) {
		case 0x10:
			if (tea5761_autodetection(t->i2c.adapter, t->i2c.addr) != EINVAL) {
				t->type = TUNER_TEA5761;
				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;
		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.adapter, t->i2c.addr) == 0) {
				tuner_dbg("chip at addr %x is a tda8290\n", addr);
			} else {
				/* Default is being tda9887 */
				t->type = TUNER_TDA9887;
				t->mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;
				t->mode = T_STANDBY;
				goto register_client;
			}
			break;
		case 0x60:
			if (tea5767_autodetection(t->i2c.adapter, t->i2c.addr) != 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, t->config, t->tuner_callback);
	return 0;
}

static int tuner_probe(struct i2c_adapter *adap)
{
	if (0 != addr) {
		normal_i2c[0] = addr;
		normal_i2c[1] = I2C_CLIENT_END;
	}

	/* HACK: Ignore 0x6b and 0x6f on cx88 boards.
	 * FusionHDTV5 RT Gold has an ir receiver at 0x6b
	 * and an RTC at 0x6f which can get corrupted if probed.
	 */
	if ((adap->id == I2C_HW_B_CX2388x) ||
	    (adap->id == I2C_HW_B_CX23885)) {
		unsigned int i = 0;

		while (i < I2C_CLIENT_MAX_OPTS && ignore[i] != I2C_CLIENT_END)
			i += 2;
		if (i + 4 < I2C_CLIENT_MAX_OPTS) {
			ignore[i+0] = adap->nr;
			ignore[i+1] = 0x6b;
			ignore[i+2] = adap->nr;
			ignore[i+3] = 0x6f;
			ignore[i+4] = I2C_CLIENT_END;
		} else
			printk(KERN_WARNING "tuner: "
			       "too many options specified "
			       "in i2c probe ignore list!\n");
	}

	default_mode_mask = T_RADIO | T_ANALOG_TV | T_DIGITAL_TV;

	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, tuner_attach);
	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 (t->ops.release)
		t->ops.release(t);
	else {
		kfree(t->priv);
	}
	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->ops.standby)
			t->ops.standby(t);
		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. */
	return 0;
}

static int tuner_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct tuner *t = i2c_get_clientdata(client);
	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;

	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, config=0x%02x\n",
				((struct tuner_setup *)arg)->type,
				((struct tuner_setup *)arg)->addr,
				((struct tuner_setup *)arg)->mode_mask,
				((struct tuner_setup *)arg)->config);

		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;
		t->mode = T_STANDBY;
		if (t->ops.standby)
			t->ops.standby(t);
		break;
#ifdef CONFIG_VIDEO_V4L1
	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;
	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 (fe_tuner_ops->get_status) {
					u32 tuner_status;

					fe_tuner_ops->get_status(&t->fe, &tuner_status);
					if (tuner_status & TUNER_STATUS_STEREO)
						vt->flags |= VIDEO_TUNER_STEREO_ON;
					else
						vt->flags &= ~VIDEO_TUNER_STEREO_ON;
				} else {
					if (t->ops.is_stereo) {
						if (t->ops.is_stereo(t))
							vt->flags |=
								VIDEO_TUNER_STEREO_ON;
						else
							vt->flags &=
								~VIDEO_TUNER_STEREO_ON;
					}
				}
				if (t->ops.has_signal)
					vt->signal = t->ops.has_signal(t);

				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) {
				if (fe_tuner_ops->get_status) {
					u32 tuner_status;

					fe_tuner_ops->get_status(&t->fe, &tuner_status);
					va->mode = (tuner_status & TUNER_STATUS_STEREO)
					    ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
				} else if (t->ops.is_stereo)
					va->mode = t->ops.is_stereo(t)
					    ? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
			}
			return 0;
		}
#endif
	case TDA9887_SET_CONFIG:
		if (t->type == TUNER_TDA9887) {
			int *i = arg;

			t->tda9887_config = *i;
			set_freq(client, t->tv_freq);
		}
		break;
	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
	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;

			if (set_mode (client, t, f->type, "VIDIOC_S_FREQUENCY")
					== EINVAL)
				return 0;
			switch_v4l2();
			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;
			if (fe_tuner_ops->get_frequency) {
				u32 abs_freq;

				fe_tuner_ops->get_frequency(&t->fe, &abs_freq);
				f->frequency = (V4L2_TUNER_RADIO == t->mode) ?
					(abs_freq * 2 + 125/2) / 125 :
					(abs_freq + 62500/2) / 62500;
				break;
			}
			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->ops.get_afc)
				tuner->afc=t->ops.get_afc(t);
			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 */
			tuner->rxsubchans =
				V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
			if (fe_tuner_ops->get_status) {
				u32 tuner_status;

				fe_tuner_ops->get_status(&t->fe, &tuner_status);
				tuner->rxsubchans = (tuner_status & TUNER_STATUS_STEREO) ?
					V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
			} else {
				if (t->ops.is_stereo) {
					tuner->rxsubchans = t->ops.is_stereo(t) ?
						V4L2_TUNER_SUB_STEREO : V4L2_TUNER_SUB_MONO;
				}
			}
			if (t->ops.has_signal)
				tuner->signal = t->ops.has_signal(t);
			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:
		if (t->ops.tuner_status)
			t->ops.tuner_status(t);
		break;
	}

	return 0;
}

static int tuner_suspend(struct i2c_client *c, pm_message_t state)
{
	struct tuner *t = i2c_get_clientdata (c);

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

static int tuner_resume(struct i2c_client *c)
{
	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;
}

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

static struct i2c_driver driver = {
	.id = I2C_DRIVERID_TUNER,
	.attach_adapter = tuner_probe,
	.detach_client = tuner_detach,
	.command = tuner_command,
	.suspend = tuner_suspend,
	.resume  = tuner_resume,
	.driver = {
		.name    = "tuner",
	},
};
static struct i2c_client client_template = {
	.name = "(tuner unset)",
	.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:
 */