msp3400-driver.c

来自「linux2.6.16版本」· C语言 代码 · 共 1,275 行 · 第 1/3 页

			break;
		case AUDIO_EXTERN_1:
			/* IN1 is often used for external input ... */
			state->mode = MSP_MODE_EXTERN;
			scart       = SCART_IN1;
			break;
		case AUDIO_EXTERN_2:
			/* ... sometimes it is IN2 through ;) */
			state->mode = MSP_MODE_EXTERN;
			scart       = SCART_IN2;
			break;
		case AUDIO_TUNER:
			state->mode = -1;
			break;
		}
		if (scart) {
			state->rxsubchans = V4L2_TUNER_SUB_STEREO;
			state->audmode = V4L2_TUNER_MODE_STEREO;
			msp_set_scart(client, scart, 0);
			msp_write_dsp(client, 0x000d, 0x1900);
		}
		if (sarg->capability == V4L2_AUDCAP_STEREO) {
			state->audmode = V4L2_TUNER_MODE_STEREO;
		} else {
			state->audmode &= ~V4L2_TUNER_MODE_STEREO;
		}
		msp_any_set_audmode(client, state->audmode);
		msp_wake_thread(client);
		break;
	}

	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *vt = arg;

		if (state->radio)
			break;
		if (state->opmode == OPMODE_AUTOSELECT)
			msp_any_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)
			break;
		/* only set audmode */
		if (vt->audmode != -1 && vt->audmode != 0)
			msp_any_set_audmode(client, vt->audmode);
		break;
	}

	case VIDIOC_G_AUDOUT:
	{
		struct v4l2_audioout *a = (struct v4l2_audioout *)arg;
		int idx = a->index;

		memset(a, 0, sizeof(*a));

		switch (idx) {
		case 0:
			strcpy(a->name, "Scart1 Out");
			break;
		case 1:
			strcpy(a->name, "Scart2 Out");
			break;
		case 2:
			strcpy(a->name, "I2S Out");
			break;
		default:
			return -EINVAL;
		}
		break;

	}

	case VIDIOC_S_AUDOUT:
	{
		struct v4l2_audioout *a = (struct v4l2_audioout *)arg;

		if (a->index < 0 || a->index > 2)
			return -EINVAL;

		v4l_dbg(1, msp_debug, client, "Setting audio out on msp34xx to input %i\n", a->index);
		msp_set_scart(client, state->in_scart, a->index + 1);

		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;
		int i;

		for (i = 0; i < ARRAY_SIZE(msp_qctrl_std); i++)
			if (qc->id && qc->id == msp_qctrl_std[i].id) {
				memcpy(qc, &msp_qctrl_std[i], sizeof(*qc));
				return 0;
			}
		if (!state->has_sound_processing)
			return -EINVAL;
		for (i = 0; i < ARRAY_SIZE(msp_qctrl_sound_processing); i++)
			if (qc->id && qc->id == msp_qctrl_sound_processing[i].id) {
				memcpy(qc, &msp_qctrl_sound_processing[i], sizeof(*qc));
				return 0;
			}
		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_any_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 + FM-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->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 {
			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, "ACB:      0x%04x\n", state->acb);
		break;
	}

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

static int msp_suspend(struct device * dev, pm_message_t state)
{
	struct i2c_client *client = container_of(dev, struct i2c_client, dev);

	v4l_dbg(1, msp_debug, client, "suspend\n");
	msp_reset(client);
	return 0;
}

static int msp_resume(struct device * dev)
{
	struct i2c_client *client = container_of(dev, struct i2c_client, dev);

	v4l_dbg(1, msp_debug, client, "resume\n");
	msp_wake_thread(client);
	return 0;
}

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

static struct i2c_driver i2c_driver;

static int msp_attach(struct i2c_adapter *adapter, int address, int kind)
{
	struct i2c_client *client;
	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;

	client = kmalloc(sizeof(*client), GFP_KERNEL);
	if (client == NULL)
		return -ENOMEM;
	memset(client, 0, sizeof(*client));
	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver;
	snprintf(client->name, sizeof(client->name) - 1, "msp3400");

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

	state = kmalloc(sizeof(*state), GFP_KERNEL);
	if (state == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	i2c_set_clientdata(client, state);

	memset(state, 0, sizeof(*state));
	state->v4l2_std = V4L2_STD_NTSC;
	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);

	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);
		kfree(client);
		return -1;
	}

	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;
	snprintf(client->name, sizeof(client->name), "MSP%d4%02d%c-%c%d",
			msp_family, msp_product,
			msp_revision, msp_hard, msp_rom);

	/* 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 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 and scart3 inputs and scart2 output: not in stripped
	   down products of the '3' family */
	state->has_scart23_in_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_scart23_in_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;

	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, "%s found @ 0x%x (%s)\n", client->name, address << 1, adapter->name);
	v4l_info(client, "%s ", client->name);
	if (state->has_nicam && state->has_radio)
		printk("supports nicam and radio, ");
	else if (state->has_nicam)
		printk("supports nicam, ");
	else if (state->has_radio)
		printk("supports radio, ");
	printk("mode is ");

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

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

		if (state->kthread == NULL)
			v4l_warn(client, "kernel_thread() failed\n");
		msp_wake_thread(client);
	}

	/* done */
	i2c_attach_client(client);

	return 0;
}

static int msp_probe(struct i2c_adapter *adapter)
{
	if (adapter->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adapter, &addr_data, msp_attach);
	return 0;
}

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

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

	err = i2c_detach_client(client);
	if (err) {
		return err;
	}

	kfree(state);
	kfree(client);
	return 0;
}

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

/* i2c implementation */
static struct i2c_driver i2c_driver = {
	.id             = I2C_DRIVERID_MSP3400,
	.attach_adapter = msp_probe,
	.detach_client  = msp_detach,
	.command        = msp_command,
	.driver = {
		.name    = "msp3400",
		.suspend = msp_suspend,
		.resume  = msp_resume,
	},
};

static int __init msp3400_init_module(void)
{
	return i2c_add_driver(&i2c_driver);
}

static void __exit msp3400_cleanup_module(void)
{
	i2c_del_driver(&i2c_driver);
}

module_init(msp3400_init_module);
module_exit(msp3400_cleanup_module);

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