msp3400-driver.c

来自「trident tm5600的linux驱动」· C语言 代码 · 共 1,036 行 · 第 1/2 页

	/* --- v4l ioctls --- */
	/* take care: bttv does userspace copying, we'll get a
	   kernel pointer here... */
#ifdef CONFIG_VIDEO_ALLOW_V4L1
	case VIDIOCGAUDIO:
	{
		struct video_audio *va = arg;

		va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_MUTABLE;
		if (state->has_sound_processing)
			va->flags |= VIDEO_AUDIO_BALANCE |
				VIDEO_AUDIO_BASS |
				VIDEO_AUDIO_TREBLE;
		if (state->muted)
			va->flags |= VIDEO_AUDIO_MUTE;
		va->volume = state->volume;
		va->balance = state->volume ? state->balance : 32768;
		va->bass = state->bass;
		va->treble = state->treble;

		if (state->radio)
			break;
		if (state->opmode == OPMODE_AUTOSELECT)
			msp_detect_stereo(client);
		va->mode = msp_mode_v4l2_to_v4l1(state->rxsubchans, state->audmode);
		break;
	}

	case VIDIOCSAUDIO:
	{
		struct video_audio *va = arg;

		state->muted = (va->flags & VIDEO_AUDIO_MUTE);
		state->volume = va->volume;
		state->balance = va->balance;
		state->bass = va->bass;
		state->treble = va->treble;
		msp_set_audio(client);

		if (va->mode != 0 && state->radio == 0 &&
		    state->audmode != msp_mode_v4l1_to_v4l2(va->mode)) {
			state->audmode = msp_mode_v4l1_to_v4l2(va->mode);
			msp_set_audmode(client);
		}
		break;
	}

	case VIDIOCSCHAN:
	{
		struct video_channel *vc = arg;
		int update = 0;
		v4l2_std_id std;

		if (state->radio)
			update = 1;
		state->radio = 0;
		if (vc->norm == VIDEO_MODE_PAL)
			std = V4L2_STD_PAL;
		else if (vc->norm == VIDEO_MODE_SECAM)
			std = V4L2_STD_SECAM;
		else
			std = V4L2_STD_NTSC;
		if (std != state->v4l2_std) {
			state->v4l2_std = std;
			update = 1;
		}
		if (update)
			msp_wake_thread(client);
		break;
	}

	case VIDIOCSFREQ:
	{
		/* new channel -- kick audio carrier scan */
		msp_wake_thread(client);
		break;
	}
#endif
	case VIDIOC_S_FREQUENCY:
	{
		/* new channel -- kick audio carrier scan */
		msp_wake_thread(client);
		break;
	}

	/* --- v4l2 ioctls --- */
	case VIDIOC_S_STD:
	{
		v4l2_std_id *id = arg;
		int update = state->radio || state->v4l2_std != *id;

		state->v4l2_std = *id;
		state->radio = 0;
		if (update)
			msp_wake_thread(client);
		return 0;
	}

	case VIDIOC_INT_G_AUDIO_ROUTING:
	{
		struct v4l2_routing *rt = arg;

		*rt = state->routing;
		break;
	}

	case VIDIOC_INT_S_AUDIO_ROUTING:
	{
		struct v4l2_routing *rt = arg;
		int tuner = (rt->input >> 3) & 1;
		int sc_in = rt->input & 0x7;
		int sc1_out = rt->output & 0xf;
		int sc2_out = (rt->output >> 4) & 0xf;
		u16 val, reg;
		int i;
		int extern_input = 1;

		if (state->routing.input == rt->input &&
		    state->routing.output == rt->output)
			break;
		state->routing = *rt;
		/* check if the tuner input is used */
		for (i = 0; i < 5; i++) {
			if (((rt->input >> (4 + i * 4)) & 0xf) == 0)
				extern_input = 0;
		}
		state->mode = extern_input ? MSP_MODE_EXTERN : MSP_MODE_AM_DETECT;
		state->rxsubchans = V4L2_TUNER_SUB_STEREO;
		msp_set_scart(client, sc_in, 0);
		msp_set_scart(client, sc1_out, 1);
		msp_set_scart(client, sc2_out, 2);
		msp_set_audmode(client);
		reg = (state->opmode == OPMODE_AUTOSELECT) ? 0x30 : 0xbb;
		val = msp_read_dem(client, reg);
		msp_write_dem(client, reg, (val & ~0x100) | (tuner << 8));
		/* wake thread when a new input is chosen */
		msp_wake_thread(client);
		break;
	}

	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *vt = arg;

		if (state->radio)
			break;
		if (state->opmode == OPMODE_AUTOSELECT)
			msp_detect_stereo(client);
		vt->audmode    = state->audmode;
		vt->rxsubchans = state->rxsubchans;
		vt->capability |= V4L2_TUNER_CAP_STEREO |
			V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
		break;
	}

	case VIDIOC_S_TUNER:
	{
		struct v4l2_tuner *vt = (struct v4l2_tuner *)arg;

		if (state->radio)  /* TODO: add mono/stereo support for radio */
			break;
		if (state->audmode == vt->audmode)
			break;
		state->audmode = vt->audmode;
		/* only set audmode */
		msp_set_audmode(client);
		break;
	}

	case VIDIOC_INT_I2S_CLOCK_FREQ:
	{
		u32 *a = (u32 *)arg;

		v4l_dbg(1, msp_debug, client, "Setting I2S speed to %d\n", *a);

		switch (*a) {
		case 1024000:
			state->i2s_mode = 0;
			break;
		case 2048000:
			state->i2s_mode = 1;
			break;
		default:
			return -EINVAL;
		}
		break;
	}

	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *qc = arg;

		switch (qc->id) {
		case V4L2_CID_AUDIO_VOLUME:
		case V4L2_CID_AUDIO_MUTE:
			return v4l2_ctrl_query_fill_std(qc);
		default:
			break;
		}
		if (!state->has_sound_processing)
			return -EINVAL;
		switch (qc->id) {
		case V4L2_CID_AUDIO_LOUDNESS:
		case V4L2_CID_AUDIO_BALANCE:
		case V4L2_CID_AUDIO_BASS:
		case V4L2_CID_AUDIO_TREBLE:
			return v4l2_ctrl_query_fill_std(qc);
		default:
			return -EINVAL;
		}
	}

	case VIDIOC_G_CTRL:
		return msp_get_ctrl(client, arg);

	case VIDIOC_S_CTRL:
		return msp_set_ctrl(client, arg);

	case VIDIOC_LOG_STATUS:
	{
		const char *p;

		if (state->opmode == OPMODE_AUTOSELECT)
			msp_detect_stereo(client);
		v4l_info(client, "%s rev1 = 0x%04x rev2 = 0x%04x\n",
				client->name, state->rev1, state->rev2);
		v4l_info(client, "Audio:    volume %d%s\n",
				state->volume, state->muted ? " (muted)" : "");
		if (state->has_sound_processing) {
			v4l_info(client, "Audio:    balance %d bass %d treble %d loudness %s\n",
					state->balance, state->bass,
					state->treble,
					state->loudness ? "on" : "off");
		}
		switch (state->mode) {
		case MSP_MODE_AM_DETECT: p = "AM (for carrier detect)"; break;
		case MSP_MODE_FM_RADIO: p = "FM Radio"; break;
		case MSP_MODE_FM_TERRA: p = "Terrestial FM-mono/stereo"; break;
		case MSP_MODE_FM_SAT: p = "Satellite FM-mono"; break;
		case MSP_MODE_FM_NICAM1: p = "NICAM/FM (B/G, D/K)"; break;
		case MSP_MODE_FM_NICAM2: p = "NICAM/FM (I)"; break;
		case MSP_MODE_AM_NICAM: p = "NICAM/AM (L)"; break;
		case MSP_MODE_BTSC: p = "BTSC"; break;
		case MSP_MODE_EXTERN: p = "External input"; break;
		default: p = "unknown"; break;
		}
		if (state->mode == MSP_MODE_EXTERN) {
			v4l_info(client, "Mode:     %s\n", p);
		} else if (state->opmode == OPMODE_MANUAL) {
			v4l_info(client, "Mode:     %s (%s%s)\n", p,
				(state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
				(state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
		} else {
			if (state->opmode == OPMODE_AUTODETECT)
				v4l_info(client, "Mode:     %s\n", p);
			v4l_info(client, "Standard: %s (%s%s)\n",
				msp_standard_std_name(state->std),
				(state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
				(state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
		}
		v4l_info(client, "Audmode:  0x%04x\n", state->audmode);
		v4l_info(client, "Routing:  0x%08x (input) 0x%08x (output)\n",
				state->routing.input, state->routing.output);
		v4l_info(client, "ACB:      0x%04x\n", state->acb);
		break;
	}

	case VIDIOC_G_CHIP_IDENT:
		return v4l2_chip_ident_i2c_client(client, arg, state->ident,
				(state->rev1 << 16) | state->rev2);

	default:
		/* unknown */
		return -EINVAL;
	}
	return 0;
}

static int msp_suspend(struct i2c_client *client, pm_message_t state)
{
	v4l_dbg(1, msp_debug, client, "suspend\n");
	msp_reset(client);
	return 0;
}

static int msp_resume(struct i2c_client *client)
{
	v4l_dbg(1, msp_debug, client, "resume\n");
	msp_wake_thread(client);
	return 0;
}

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

static int msp_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
	struct msp_state *state;
	int (*thread_func)(void *data) = NULL;
	int msp_hard;
	int msp_family;
	int msp_revision;
	int msp_product, msp_prod_hi, msp_prod_lo;
	int msp_rom;

#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
	snprintf(client->name, sizeof(client->name) - 1, "msp3400");
#else
	if (!id)
		strlcpy(client->name, "msp3400", sizeof(client->name));
#endif

	if (msp_reset(client) == -1) {
		v4l_dbg(1, msp_debug, client, "msp3400 not found\n");
		return -ENODEV;
	}

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		return -ENOMEM;

	i2c_set_clientdata(client, state);

	state->v4l2_std = V4L2_STD_NTSC;
	state->audmode = V4L2_TUNER_MODE_STEREO;
	state->volume = 58880;	/* 0db gain */
	state->balance = 32768;	/* 0db gain */
	state->bass = 32768;
	state->treble = 32768;
	state->loudness = 0;
	state->input = -1;
	state->muted = 0;
	state->i2s_mode = 0;
	init_waitqueue_head(&state->wq);
	/* These are the reset input/output positions */
	state->routing.input = MSP_INPUT_DEFAULT;
	state->routing.output = MSP_OUTPUT_DEFAULT;

	state->rev1 = msp_read_dsp(client, 0x1e);
	if (state->rev1 != -1)
		state->rev2 = msp_read_dsp(client, 0x1f);
	v4l_dbg(1, msp_debug, client, "rev1=0x%04x, rev2=0x%04x\n",
			state->rev1, state->rev2);
	if (state->rev1 == -1 || (state->rev1 == 0 && state->rev2 == 0)) {
		v4l_dbg(1, msp_debug, client,
				"not an msp3400 (cannot read chip version)\n");
		kfree(state);
		return -ENODEV;
	}

#if 0
	/* this will turn on a 1kHz beep - might be useful for debugging... */
	msp_write_dsp(client, 0x0014, 0x1040);
#endif
	msp_set_audio(client);

	msp_family = ((state->rev1 >> 4) & 0x0f) + 3;
	msp_product = (state->rev2 >> 8) & 0xff;
	msp_prod_hi = msp_product / 10;
	msp_prod_lo = msp_product % 10;
	msp_revision = (state->rev1 & 0x0f) + '@';
	msp_hard = ((state->rev1 >> 8) & 0xff) + '@';
	msp_rom = state->rev2 & 0x1f;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)
	snprintf(client->name, sizeof(client->name), "MSP%d4%02d%c-%c%d",
			msp_family, msp_product,
			msp_revision, msp_hard, msp_rom);
#endif
	/* Rev B=2, C=3, D=4, G=7 */
	state->ident = msp_family * 10000 + 4000 + msp_product * 10 +
			msp_revision - '@';

	/* Has NICAM support: all mspx41x and mspx45x products have NICAM */
	state->has_nicam =
		msp_prod_hi == 1 || msp_prod_hi == 5;
	/* Has radio support: was added with revision G */
	state->has_radio =
		msp_revision >= 'G';
	/* Has headphones output: not for stripped down products */
	state->has_headphones =
		msp_prod_lo < 5;
	/* Has scart2 input: not in stripped down products of the '3' family */
	state->has_scart2 =
		msp_family >= 4 || msp_prod_lo < 7;
	/* Has scart3 input: not in stripped down products of the '3' family */
	state->has_scart3 =
		msp_family >= 4 || msp_prod_lo < 5;
	/* Has scart4 input: not in pre D revisions, not in stripped D revs */
	state->has_scart4 =
		msp_family >= 4 || (msp_revision >= 'D' && msp_prod_lo < 5);
	/* Has scart2 output: not in stripped down products of
	 * the '3' family */
	state->has_scart2_out =
		msp_family >= 4 || msp_prod_lo < 5;
	/* Has scart2 a volume control? Not in pre-D revisions. */
	state->has_scart2_out_volume =
		msp_revision > 'C' && state->has_scart2_out;
	/* Has a configurable i2s out? */
	state->has_i2s_conf =
		msp_revision >= 'G' && msp_prod_lo < 7;
	/* Has subwoofer output: not in pre-D revs and not in stripped down
	 * products */
	state->has_subwoofer =
		msp_revision >= 'D' && msp_prod_lo < 5;
	/* Has soundprocessing (bass/treble/balance/loudness/equalizer):
	 *  not in stripped down products */
	state->has_sound_processing =
		msp_prod_lo < 7;
	/* Has Virtual Dolby Surround: only in msp34x1 */
	state->has_virtual_dolby_surround =
		msp_revision == 'G' && msp_prod_lo == 1;
	/* Has Virtual Dolby Surround & Dolby Pro Logic: only in msp34x2 */
	state->has_dolby_pro_logic =
		msp_revision == 'G' && msp_prod_lo == 2;
	/* The msp343xG supports BTSC only and cannot do Automatic Standard
	 * Detection. */
	state->force_btsc =
		msp_family == 3 && msp_revision == 'G' && msp_prod_hi == 3;

	state->opmode = opmode;
	if (state->opmode == OPMODE_AUTO) {
		/* MSP revision G and up have both autodetect and autoselect */
		if (msp_revision >= 'G')
			state->opmode = OPMODE_AUTOSELECT;
		/* MSP revision D and up have autodetect */
		else if (msp_revision >= 'D')
			state->opmode = OPMODE_AUTODETECT;
		else
			state->opmode = OPMODE_MANUAL;
	}

	/* hello world :-) */
	v4l_info(client, "MSP%d4%02d%c-%c%d found @ 0x%x (%s)\n",
			msp_family, msp_product,
			msp_revision, msp_hard, msp_rom,
			client->addr << 1, client->adapter->name);
	v4l_info(client, "%s ", client->name);
	if (state->has_nicam && state->has_radio)
		printk(KERN_CONT "supports nicam and radio, ");
	else if (state->has_nicam)
		printk(KERN_CONT "supports nicam, ");
	else if (state->has_radio)
		printk(KERN_CONT "supports radio, ");
	printk(KERN_CONT "mode is ");

	/* version-specific initialization */
	switch (state->opmode) {
	case OPMODE_MANUAL:
		printk(KERN_CONT "manual");
		thread_func = msp3400c_thread;
		break;
	case OPMODE_AUTODETECT:
		printk(KERN_CONT "autodetect");
		thread_func = msp3410d_thread;
		break;
	case OPMODE_AUTOSELECT:
		printk(KERN_CONT "autodetect and autoselect");
		thread_func = msp34xxg_thread;
		break;
	}
	printk(KERN_CONT "\n");

	/* startup control thread if needed */
	if (thread_func) {
		state->kthread = kthread_run(thread_func, client, "msp34xx");

		if (IS_ERR(state->kthread))
			v4l_warn(client, "kernel_thread() failed\n");
		msp_wake_thread(client);
	}
	return 0;
}

static int msp_remove(struct i2c_client *client)
{
	struct msp_state *state = i2c_get_clientdata(client);

	/* shutdown control thread */
	if (state->kthread) {
		state->restart = 1;
		kthread_stop(state->kthread);
	}
	msp_reset(client);

	kfree(state);
	return 0;
}

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

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
static const struct i2c_device_id msp_id[] = {
	{ "msp3400", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, msp_id);

#endif
static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "msp3400",
	.driverid = I2C_DRIVERID_MSP3400,
	.command = msp_command,
	.probe = msp_probe,
	.remove = msp_remove,
	.suspend = msp_suspend,
	.resume = msp_resume,
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26)
	.id_table = msp_id,
#endif
};

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