saa7134-tvaudio.c

trident tm5600的linux驱动

				}
			}
		}

		if (0 != carrier && max1 > 2000 && max1 > max2*3) {
			/* found good carrier */
			dprintk("found %s main sound carrier @ %d.%03d MHz [%d/%d]\n",
				dev->tvnorm->name, carrier/1000, carrier%1000,
				max1, max2);
			dev->last_carrier = carrier;

		} else if (0 != dev->last_carrier) {
			/* no carrier -- try last detected one as fallback */
			carrier = dev->last_carrier;
			dprintk(KERN_WARNING "%s/audio: audio carrier scan failed, "
			       "using %d.%03d MHz [last detected]\n",
			       dev->name, carrier/1000, carrier%1000);

		} else {
			/* no carrier + no fallback -- use default */
			carrier = default_carrier;
			dprintk(KERN_WARNING "%s/audio: audio carrier scan failed, "
			       "using %d.%03d MHz [default]\n",
			       dev->name, carrier/1000, carrier%1000);
		}
		tvaudio_setcarrier(dev,carrier,carrier);
		dev->automute = 0;
		saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x00);
		saa7134_tvaudio_setmute(dev);
		/* find the exact tv audio norm */
		for (audio = UNSET, i = 0; i < TVAUDIO; i++) {
			if (dev->tvnorm->id != UNSET &&
				!(dev->tvnorm->id & tvaudio[i].std))
				continue;
			if (tvaudio[i].carr1 != carrier)
				continue;
			/* Note: at least the primary carrier is right here */
			if (UNSET == audio)
				audio = i;
			tvaudio_setmode(dev,&tvaudio[i],"trying");
			if (tvaudio_sleep(dev,SCAN_SUBCARRIER_DELAY))
				goto restart;
			if (-1 != tvaudio_getstereo(dev,&tvaudio[i])) {
				audio = i;
				break;
			}
		}
		saa_andorb(SAA7134_STEREO_DAC_OUTPUT_SELECT, 0x30, 0x30);
		if (UNSET == audio)
			continue;
		tvaudio_setmode(dev,&tvaudio[audio],"using");

		tvaudio_setstereo(dev,&tvaudio[audio],V4L2_TUNER_MODE_MONO);
		dev->tvaudio = &tvaudio[audio];

		lastmode = 42;
		for (;;) {

			try_to_freeze();

			if (tvaudio_sleep(dev,5000))
				goto restart;
			if (kthread_should_stop())
				break;
			if (UNSET == dev->thread.mode) {
				rx = tvaudio_getstereo(dev,&tvaudio[i]);
				mode = saa7134_tvaudio_rx2mode(rx);
			} else {
				mode = dev->thread.mode;
			}
			if (lastmode != mode) {
				tvaudio_setstereo(dev,&tvaudio[audio],mode);
				lastmode = mode;
			}
		}
	}

 done:
	dev->thread.stopped = 1;
	return 0;
}

/* ------------------------------------------------------------------ */
/* saa7133 / saa7135 code                                             */

static char *stdres[0x20] = {
	[0x00] = "no standard detected",
	[0x01] = "B/G (in progress)",
	[0x02] = "D/K (in progress)",
	[0x03] = "M (in progress)",

	[0x04] = "B/G A2",
	[0x05] = "B/G NICAM",
	[0x06] = "D/K A2 (1)",
	[0x07] = "D/K A2 (2)",
	[0x08] = "D/K A2 (3)",
	[0x09] = "D/K NICAM",
	[0x0a] = "L NICAM",
	[0x0b] = "I NICAM",

	[0x0c] = "M Korea",
	[0x0d] = "M BTSC ",
	[0x0e] = "M EIAJ",

	[0x0f] = "FM radio / IF 10.7 / 50 deemp",
	[0x10] = "FM radio / IF 10.7 / 75 deemp",
	[0x11] = "FM radio / IF sel / 50 deemp",
	[0x12] = "FM radio / IF sel / 75 deemp",

	[0x13 ... 0x1e ] = "unknown",
	[0x1f] = "??? [in progress]",
};

#define DSP_RETRY 32
#define DSP_DELAY 16
#define SAA7135_DSP_RWCLEAR_RERR 1

static inline int saa_dsp_reset_error_bit(struct saa7134_dev *dev)
{
	int state = saa_readb(SAA7135_DSP_RWSTATE);
	if (unlikely(state & SAA7135_DSP_RWSTATE_ERR)) {
		d2printk("%s: resetting error bit\n", dev->name);
		saa_writeb(SAA7135_DSP_RWCLEAR, SAA7135_DSP_RWCLEAR_RERR);
	}
	return 0;
}

static inline int saa_dsp_wait_bit(struct saa7134_dev *dev, int bit)
{
	int state, count = DSP_RETRY;

	state = saa_readb(SAA7135_DSP_RWSTATE);
	if (unlikely(state & SAA7135_DSP_RWSTATE_ERR)) {
		printk(KERN_WARNING "%s: dsp access error\n", dev->name);
		saa_dsp_reset_error_bit(dev);
		return -EIO;
	}
	while (0 == (state & bit)) {
		if (unlikely(0 == count)) {
			printk("%s: dsp access wait timeout [bit=%s]\n",
			       dev->name,
			       (bit & SAA7135_DSP_RWSTATE_WRR) ? "WRR" :
			       (bit & SAA7135_DSP_RWSTATE_RDB) ? "RDB" :
			       (bit & SAA7135_DSP_RWSTATE_IDA) ? "IDA" :
			       "???");
			return -EIO;
		}
		saa_wait(DSP_DELAY);
		state = saa_readb(SAA7135_DSP_RWSTATE);
		count--;
	}
	return 0;
}

#if 0
static int saa_dsp_readl(struct saa7134_dev *dev, int reg, u32 *value)
{
	int err;

	d2printk("dsp read reg 0x%x\n", reg<<2);
	saa_readl(reg);
	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_RDB);
	if (err < 0)
		return err;
	*value = saa_readl(reg);
	d2printk("dsp read   => 0x%06x\n", *value & 0xffffff);
	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_IDA);
	if (err < 0)
		return err;
	return 0;
}
#endif

int saa_dsp_writel(struct saa7134_dev *dev, int reg, u32 value)
{
	int err;

	d2printk("dsp write reg 0x%x = 0x%06x\n",reg<<2,value);
	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
	if (err < 0)
		return err;
	saa_writel(reg,value);
	err = saa_dsp_wait_bit(dev,SAA7135_DSP_RWSTATE_WRR);
	if (err < 0)
		return err;
	return 0;
}

static int getstereo_7133(struct saa7134_dev *dev)
{
	int retval = V4L2_TUNER_SUB_MONO;
	u32 value;

	value = saa_readl(0x528 >> 2);
	if (value & 0x20)
		retval = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
	if (value & 0x40)
		retval = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;
	return retval;
}

static int mute_input_7133(struct saa7134_dev *dev)
{
	u32 reg = 0;
	u32 xbarin, xbarout;
	int mask;
	struct saa7134_input *in;

	xbarin = 0x03;
	switch (dev->input->amux) {
	case TV:
		reg = 0x02;
		xbarin = 0;
		break;
	case LINE1:
		reg = 0x00;
		break;
	case LINE2:
	case LINE2_LEFT:
		reg = 0x09;
		break;
	}
	saa_dsp_writel(dev, 0x464 >> 2, xbarin);
	if (dev->ctl_mute) {
		reg = 0x07;
		xbarout = 0xbbbbbb;
	} else
		xbarout = 0xbbbb10;
	saa_dsp_writel(dev, 0x46c >> 2, xbarout);

	saa_writel(0x594 >> 2, reg);


	/* switch gpio-connected external audio mux */
	if (0 != card(dev).gpiomask) {
		mask = card(dev).gpiomask;

		if (card(dev).mute.name && dev->ctl_mute)
			in = &card(dev).mute;
		else
			in = dev->input;

		saa_andorl(SAA7134_GPIO_GPMODE0 >> 2,   mask, mask);
		saa_andorl(SAA7134_GPIO_GPSTATUS0 >> 2, mask, in->gpio);
		saa7134_track_gpio(dev,in->name);
	}

	return 0;
}

static int tvaudio_thread_ddep(void *data)
{
	struct saa7134_dev *dev = data;
	u32 value, norms;

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23)
	set_freezable();
#endif
	for (;;) {
		tvaudio_sleep(dev,-1);
		if (kthread_should_stop())
			goto done;
	restart:
		try_to_freeze();

		dev->thread.scan1 = dev->thread.scan2;
		dprintk("tvaudio thread scan start [%d]\n",dev->thread.scan1);

		if (audio_ddep >= 0x04 && audio_ddep <= 0x0e) {
			/* insmod option override */
			norms = (audio_ddep << 2) | 0x01;
			dprintk("ddep override: %s\n",stdres[audio_ddep]);
		} else if (&card(dev).radio == dev->input) {
			dprintk("FM Radio\n");
			if (dev->tuner_type == TUNER_PHILIPS_TDA8290) {
				norms = (0x11 << 2) | 0x01;
				saa_dsp_writel(dev, 0x42c >> 2, 0x729555);
			} else {
				norms = (0x0f << 2) | 0x01;
			}
		} else {
			/* (let chip) scan for sound carrier */
			norms = 0;
			if (dev->tvnorm->id & (V4L2_STD_B | V4L2_STD_GH))
				norms |= 0x04;
			if (dev->tvnorm->id & V4L2_STD_PAL_I)
				norms |= 0x20;
			if (dev->tvnorm->id & V4L2_STD_DK)
				norms |= 0x08;
			if (dev->tvnorm->id & V4L2_STD_MN)
				norms |= 0x40;
			if (dev->tvnorm->id & (V4L2_STD_SECAM_L | V4L2_STD_SECAM_LC))
				norms |= 0x10;
			if (0 == norms)
				norms = 0x7c; /* all */
			dprintk("scanning:%s%s%s%s%s\n",
				(norms & 0x04) ? " B/G"  : "",
				(norms & 0x08) ? " D/K"  : "",
				(norms & 0x10) ? " L/L'" : "",
				(norms & 0x20) ? " I"    : "",
				(norms & 0x40) ? " M"    : "");
		}

		/* kick automatic standard detection */
		saa_dsp_writel(dev, 0x454 >> 2, 0);
		saa_dsp_writel(dev, 0x454 >> 2, norms | 0x80);

		/* setup crossbars */
		saa_dsp_writel(dev, 0x464 >> 2, 0x000000);
		saa_dsp_writel(dev, 0x470 >> 2, 0x101010);

		if (tvaudio_sleep(dev,3000))
			goto restart;
		value = saa_readl(0x528 >> 2) & 0xffffff;

		dprintk("tvaudio thread status: 0x%x [%s%s%s]\n",
			value, stdres[value & 0x1f],
			(value & 0x000020) ? ",stereo" : "",
			(value & 0x000040) ? ",dual"   : "");
		dprintk("detailed status: "
			"%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s#%s\n",
			(value & 0x000080) ? " A2/EIAJ pilot tone "     : "",
			(value & 0x000100) ? " A2/EIAJ dual "           : "",
			(value & 0x000200) ? " A2/EIAJ stereo "         : "",
			(value & 0x000400) ? " A2/EIAJ noise mute "     : "",

			(value & 0x000800) ? " BTSC/FM radio pilot "    : "",
			(value & 0x001000) ? " SAP carrier "            : "",
			(value & 0x002000) ? " BTSC stereo noise mute " : "",
			(value & 0x004000) ? " SAP noise mute "         : "",
			(value & 0x008000) ? " VDSP "                   : "",

			(value & 0x010000) ? " NICST "                  : "",
			(value & 0x020000) ? " NICDU "                  : "",
			(value & 0x040000) ? " NICAM muted "            : "",
			(value & 0x080000) ? " NICAM reserve sound "    : "",

			(value & 0x100000) ? " init done "              : "");
	}

 done:
	dev->thread.stopped = 1;
	return 0;
}

/* ------------------------------------------------------------------ */
/* common stuff + external entry points                               */

void saa7134_enable_i2s(struct saa7134_dev *dev)
{
	int i2s_format;

	if (!card_is_empress(dev))
		return;

	if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
		return;

	/* configure GPIO for out */
	saa_andorl(SAA7134_GPIO_GPMODE0 >> 2, 0x0E000000, 0x00000000);

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
	    /* Set I2S format (SONY)  */
	    saa_writeb(SAA7133_I2S_AUDIO_CONTROL, 0x00);
	    /* Start I2S */
	    saa_writeb(SAA7134_I2S_AUDIO_OUTPUT, 0x11);
	    break;

	case PCI_DEVICE_ID_PHILIPS_SAA7134:
	    i2s_format = (dev->input->amux == TV) ? 0x00 : 0x01;

	    /* enable I2S audio output for the mpeg encoder */
	    saa_writeb(SAA7134_I2S_OUTPUT_SELECT, 0x80);
	    saa_writeb(SAA7134_I2S_OUTPUT_FORMAT, i2s_format);
	    saa_writeb(SAA7134_I2S_OUTPUT_LEVEL,  0x0F);
	    saa_writeb(SAA7134_I2S_AUDIO_OUTPUT,  0x01);

	default:
	    break;
	}
}

int saa7134_tvaudio_rx2mode(u32 rx)
{
	u32 mode;

	mode = V4L2_TUNER_MODE_MONO;
	if (rx & V4L2_TUNER_SUB_STEREO)
		mode = V4L2_TUNER_MODE_STEREO;
	else if (rx & V4L2_TUNER_SUB_LANG1)
		mode = V4L2_TUNER_MODE_LANG1;
	else if (rx & V4L2_TUNER_SUB_LANG2)
		mode = V4L2_TUNER_MODE_LANG2;
	return mode;
}

void saa7134_tvaudio_setmute(struct saa7134_dev *dev)
{
	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7130:
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		mute_input_7134(dev);
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		mute_input_7133(dev);
		break;
	}
}

void saa7134_tvaudio_setinput(struct saa7134_dev *dev,
			      struct saa7134_input *in)
{
	dev->input = in;
	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7130:
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		mute_input_7134(dev);
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		mute_input_7133(dev);
		break;
	}
	saa7134_enable_i2s(dev);
}

void saa7134_tvaudio_setvolume(struct saa7134_dev *dev, int level)
{
	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		saa_writeb(SAA7134_CHANNEL1_LEVEL,     level & 0x1f);
		saa_writeb(SAA7134_CHANNEL2_LEVEL,     level & 0x1f);
		saa_writeb(SAA7134_NICAM_LEVEL_ADJUST, level & 0x1f);
		break;
	}
}

int saa7134_tvaudio_getstereo(struct saa7134_dev *dev)
{
	int retval = V4L2_TUNER_SUB_MONO;

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		if (dev->tvaudio)
			retval = tvaudio_getstereo(dev,dev->tvaudio);
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		retval = getstereo_7133(dev);
		break;
	}
	return retval;
}

void saa7134_tvaudio_init(struct saa7134_dev *dev)
{
	int clock = saa7134_boards[dev->board].audio_clock;

	if (UNSET != audio_clock_override)
		clock = audio_clock_override;

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		/* init all audio registers */
		saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x00);
		if (need_resched())
			schedule();
		else
			udelay(10);

		saa_writeb(SAA7134_AUDIO_CLOCK0,      clock        & 0xff);
		saa_writeb(SAA7134_AUDIO_CLOCK1,     (clock >>  8) & 0xff);
		saa_writeb(SAA7134_AUDIO_CLOCK2,     (clock >> 16) & 0xff);
		/* frame locked audio is mandatory for NICAM */
		saa_writeb(SAA7134_AUDIO_PLL_CTRL,   0x01);
		saa_writeb(SAA7134_NICAM_ERROR_LOW,  0x14);
		saa_writeb(SAA7134_NICAM_ERROR_HIGH, 0x50);
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		saa_writel(0x598 >> 2, clock);
		saa_dsp_writel(dev, 0x474 >> 2, 0x00);
		saa_dsp_writel(dev, 0x450 >> 2, 0x00);
	}
}

int saa7134_tvaudio_init2(struct saa7134_dev *dev)
{
	int (*my_thread)(void *data) = NULL;

	switch (dev->pci->device) {
	case PCI_DEVICE_ID_PHILIPS_SAA7134:
		my_thread = tvaudio_thread;
		break;
	case PCI_DEVICE_ID_PHILIPS_SAA7133:
	case PCI_DEVICE_ID_PHILIPS_SAA7135:
		my_thread = tvaudio_thread_ddep;
		break;
	}

	dev->thread.thread = NULL;
	if (my_thread) {
		saa7134_tvaudio_init(dev);
		/* start tvaudio thread */
		dev->thread.thread = kthread_run(my_thread, dev, "%s", dev->name);
		if (IS_ERR(dev->thread.thread)) {
			printk(KERN_WARNING "%s: kernel_thread() failed\n",
			       dev->name);
			/* XXX: missing error handling here */
		}
		saa7134_tvaudio_do_scan(dev);
	}

	saa7134_enable_i2s(dev);
	return 0;
}

int saa7134_tvaudio_fini(struct saa7134_dev *dev)
{
	/* shutdown tvaudio thread */
	if (dev->thread.thread && !dev->thread.stopped)
		kthread_stop(dev->thread.thread);

	saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x07, 0x00); /* LINE1 */
	return 0;
}

int saa7134_tvaudio_do_scan(struct saa7134_dev *dev)
{
	if (dev->input->amux != TV) {
		dprintk("sound IF not in use, skipping scan\n");
		dev->automute = 0;
		saa7134_tvaudio_setmute(dev);
	} else if (dev->thread.thread) {
		dev->thread.mode = UNSET;
		dev->thread.scan2++;

		if (!dev->insuspend && !dev->thread.stopped)
			wake_up_process(dev->thread.thread);
	} else {
		dev->automute = 0;
		saa7134_tvaudio_setmute(dev);
	}
	return 0;
}

EXPORT_SYMBOL(saa_dsp_writel);
EXPORT_SYMBOL(saa7134_tvaudio_setmute);

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */