waveartist.c

iis s3c2410-uda1341语音系统的 开发

	outb(0xFF, 0x201);
	*CSR_TIMER1_CNTL = TIMER_CNTL_ENABLE | TIMER_CNTL_DIV1;

	while (volume && (inb(0x201) & 0x01))
		volume--;

	*CSR_TIMER1_CNTL = 0;

	restore_flags(flags);
	
	volume = 0x00ffffff - *CSR_TIMER1_VALUE;


#ifndef REVERSE
	volume = 150 - (volume >> 5);
#else
	volume = (volume >> 6) - 25;
#endif

	if (volume < 0)
		volume = 0;

	if (volume > 100)
		volume = 100;

	/*
	 * slider quite often reads +-8, so debounce this random noise
	 */
	if (abs(volume - old_slider_volume) > 7) {
		old_slider_volume = volume;

		if (debug_flg & DEBUG_MIXER)
			printk(KERN_DEBUG "Slider volume: %d.\n", volume);
	}

	return old_slider_volume;
}

/*
 * Decode a recording mask into a mixer selection on the NetWinder
 * as follows:
 *
 *     OSS Source	WA Source	Actual source
 *  SOUND_MASK_IMIX	Mixer		Mixer output (same as AD1848)
 *  SOUND_MASK_LINE	Line		Line in
 *  SOUND_MASK_LINE1	Left Mic	Handset
 *  SOUND_MASK_PHONEIN	Left Aux	Telephone microphone
 *  SOUND_MASK_MIC	Right Mic	Builtin microphone
 */
static unsigned int
netwinder_select_input(wavnc_info *devc, unsigned int recmask,
		       unsigned char *dev_l, unsigned char *dev_r)
{
	unsigned int recdev_l = ADC_MUX_NONE, recdev_r = ADC_MUX_NONE;

	if (recmask & SOUND_MASK_IMIX) {
		recmask = SOUND_MASK_IMIX;
		recdev_l = ADC_MUX_MIXER;
		recdev_r = ADC_MUX_MIXER;
	} else if (recmask & SOUND_MASK_LINE) {
		recmask = SOUND_MASK_LINE;
		recdev_l = ADC_MUX_LINE;
		recdev_r = ADC_MUX_LINE;
	} else if (recmask & SOUND_MASK_LINE1) {
		recmask = SOUND_MASK_LINE1;
		waveartist_cmd1(devc, WACMD_SET_MONO); /* left */
		recdev_l = ADC_MUX_MIC;
		recdev_r = ADC_MUX_NONE;
	} else if (recmask & SOUND_MASK_PHONEIN) {
		recmask = SOUND_MASK_PHONEIN;
		waveartist_cmd1(devc, WACMD_SET_MONO); /* left */
		recdev_l = ADC_MUX_AUX1;
		recdev_r = ADC_MUX_NONE;
	} else if (recmask & SOUND_MASK_MIC) {
		recmask = SOUND_MASK_MIC;
		waveartist_cmd1(devc, WACMD_SET_MONO | 0x100);	/* right */
		recdev_l = ADC_MUX_NONE;
		recdev_r = ADC_MUX_MIC;
	}

	*dev_l = recdev_l;
	*dev_r = recdev_r;

	return recmask;
}

static int
netwinder_decode_mixer(wavnc_info *devc, int dev, unsigned char lev_l,
		       unsigned char lev_r)
{
	switch (dev) {
	case SOUND_MIXER_VOLUME:
	case SOUND_MIXER_SYNTH:
	case SOUND_MIXER_PCM:
	case SOUND_MIXER_LINE:
	case SOUND_MIXER_IGAIN:
		devc->levels[dev] = lev_l | lev_r << 8;
		break;

	case SOUND_MIXER_MIC:		/* right mic only */
		devc->levels[SOUND_MIXER_MIC] &= 0xff;
		devc->levels[SOUND_MIXER_MIC] |= lev_l << 8;
		break;

	case SOUND_MIXER_LINE1:		/* left mic only  */
		devc->levels[SOUND_MIXER_MIC] &= 0xff00;
		devc->levels[SOUND_MIXER_MIC] |= lev_l;
		dev = SOUND_MIXER_MIC;
		break;

	case SOUND_MIXER_PHONEIN:	/* left aux only  */
		devc->levels[SOUND_MIXER_LINE1] = lev_l;
		dev = SOUND_MIXER_LINE1;
		break;

	case SOUND_MIXER_IMIX:
	case SOUND_MIXER_PHONEOUT:
		break;

	default:
		dev = -EINVAL;
		break;
	}
	return dev;
}

static int netwinder_get_mixer(wavnc_info *devc, int dev)
{
	int levels;

	switch (dev) {
	case SOUND_MIXER_VOLUME:
	case SOUND_MIXER_SYNTH:
	case SOUND_MIXER_PCM:
	case SOUND_MIXER_LINE:
	case SOUND_MIXER_IGAIN:
		levels = devc->levels[dev];
		break;

	case SOUND_MIXER_MIC:		/* builtin mic: right mic only */
		levels = devc->levels[SOUND_MIXER_MIC] >> 8;
		levels |= levels << 8;
		break;

	case SOUND_MIXER_LINE1:		/* handset mic: left mic only */
		levels = devc->levels[SOUND_MIXER_MIC] & 0xff;
		levels |= levels << 8;
		break;

	case SOUND_MIXER_PHONEIN:	/* phone mic: left aux1 only */
		levels = devc->levels[SOUND_MIXER_LINE1] & 0xff;
		levels |= levels << 8;
		break;

	default:
		levels = 0;
	}

	return levels;
}

/*
 * Waveartist specific mixer information.
 */
static const struct waveartist_mixer_info netwinder_mixer = {
	supported_devs:	SOUND_MASK_VOLUME  | SOUND_MASK_SYNTH   |
			SOUND_MASK_PCM     | SOUND_MASK_SPEAKER |
			SOUND_MASK_LINE    | SOUND_MASK_MIC     |
			SOUND_MASK_IMIX    | SOUND_MASK_LINE1   |
			SOUND_MASK_PHONEIN | SOUND_MASK_PHONEOUT|
			SOUND_MASK_IGAIN,

	recording_devs:	SOUND_MASK_LINE    | SOUND_MASK_MIC     |
			SOUND_MASK_IMIX    | SOUND_MASK_LINE1   |
			SOUND_MASK_PHONEIN,

	stereo_devs:	SOUND_MASK_VOLUME  | SOUND_MASK_SYNTH   |
			SOUND_MASK_PCM     | SOUND_MASK_LINE    |
			SOUND_MASK_IMIX    | SOUND_MASK_IGAIN,

	select_input:	netwinder_select_input,
	decode_mixer:	netwinder_decode_mixer,
	get_mixer:	netwinder_get_mixer,
};

static void
vnc_configure_mixer(wavnc_info *devc, unsigned int recmask)
{
	if (!devc->no_autoselect) {
		if (devc->handset_detect) {
			recmask = SOUND_MASK_LINE1;
			devc->spkr_mute_state = devc->line_mute_state = 1;
		} else if (devc->telephone_detect) {
			recmask = SOUND_MASK_PHONEIN;
			devc->spkr_mute_state = devc->line_mute_state = 1;
		} else {
			/* unless someone has asked for LINE-IN,
			 * we default to MIC
			 */
			if ((devc->recmask & SOUND_MASK_LINE) == 0)
				devc->recmask = SOUND_MASK_MIC;
			devc->spkr_mute_state = devc->line_mute_state = 0;
		}
		vnc_mute_spkr(devc);
		vnc_mute_lout(devc);

		if (recmask != devc->recmask)
			waveartist_set_recmask(devc, recmask);
	}
}

static int
vnc_slider(wavnc_info *devc)
{
	signed int slider_volume;
	unsigned int temp, old_hs, old_td;

	/*
	 * read the "buttons" state.
	 *  Bit 4 = 0 means handset present
	 *  Bit 5 = 1 means phone offhook
	 */
	temp = inb(0x201);

	old_hs = devc->handset_detect;
	old_td = devc->telephone_detect;

	devc->handset_detect = !(temp & 0x10);
	devc->telephone_detect = !!(temp & 0x20);

	if (!devc->no_autoselect &&
	    (old_hs != devc->handset_detect ||
	     old_td != devc->telephone_detect))
		vnc_configure_mixer(devc, devc->recmask);

	slider_volume = vnc_volume_slider(devc);

	/*
	 * If we're using software controlled volume, and
	 * the slider moves by more than 20%, then we
	 * switch back to slider controlled volume.
	 */
	if (abs(devc->slider_vol - slider_volume) > 20)
		devc->use_slider = 1;

	/*
	 * use only left channel
	 */
	temp = levels[SOUND_MIXER_VOLUME] & 0xFF;

	if (slider_volume != temp && devc->use_slider) {
		devc->slider_vol = slider_volume;

		waveartist_set_mixer(devc, SOUND_MIXER_VOLUME,
			slider_volume | slider_volume << 8);

		return 1;
	}

	return 0;
}

static void
vnc_slider_tick(unsigned long data)
{
	int next_timeout;

	if (vnc_slider(adev_info + data))
		next_timeout = 5;	// mixer reported change
	else
		next_timeout = VNC_TIMER_PERIOD;

	mod_timer(&vnc_timer, jiffies + next_timeout);
}

static int
vnc_private_ioctl(int dev, unsigned int cmd, caddr_t arg)
{
	wavnc_info *devc = (wavnc_info *)audio_devs[dev]->devc;
	int val;

	switch (cmd) {
	case SOUND_MIXER_PRIVATE1:
	{
		u_int prev_spkr_mute, prev_line_mute, prev_auto_state;
		int val;

		if (get_user(val, (int *)arg))
			return -EFAULT;

		/* check if parameter is logical */
		if (val & ~(VNC_MUTE_INTERNAL_SPKR |
			    VNC_MUTE_LINE_OUT |
			    VNC_DISABLE_AUTOSWITCH))
			return -EINVAL;

		prev_auto_state = devc->no_autoselect;
		prev_spkr_mute  = devc->spkr_mute_state;
		prev_line_mute  = devc->line_mute_state;

		devc->no_autoselect   = (val & VNC_DISABLE_AUTOSWITCH) ? 1 : 0;
		devc->spkr_mute_state = (val & VNC_MUTE_INTERNAL_SPKR) ? 1 : 0;
		devc->line_mute_state = (val & VNC_MUTE_LINE_OUT) ? 1 : 0;

		if (prev_spkr_mute != devc->spkr_mute_state)
			vnc_mute_spkr(devc);

		if (prev_line_mute != devc->line_mute_state)
			vnc_mute_lout(devc);

		if (prev_auto_state != devc->no_autoselect)
			vnc_configure_mixer(devc, devc->recmask);

		return 0;
	}

	case SOUND_MIXER_PRIVATE2:
		if (get_user(val, (int *)arg))
			return -EFAULT;

		switch (val) {
#define VNC_SOUND_PAUSE         0x53    //to pause the DSP
#define VNC_SOUND_RESUME        0x57    //to unpause the DSP
		case VNC_SOUND_PAUSE:
			waveartist_cmd1(devc, 0x16);
			break;

		case VNC_SOUND_RESUME:
			waveartist_cmd1(devc, 0x18);
			break;

		default:
			return -EINVAL;
		}
		return 0;

	/* private ioctl to allow bulk access to waveartist */
	case SOUND_MIXER_PRIVATE3:
	{
		unsigned long	flags;
		int		mixer_reg[15], i, val;

		if (get_user(val, (int *)arg))
			return -EFAULT;
		if (copy_from_user(mixer_reg, (void *)val, sizeof(mixer_reg)))
			return -EFAULT;

		switch (mixer_reg[14]) {
		case MIXER_PRIVATE3_RESET:
			waveartist_mixer_reset(devc);
			break;

		case MIXER_PRIVATE3_WRITE:
			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[0], mixer_reg[4]);
			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[1], mixer_reg[5]);
			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[2], mixer_reg[6]);
			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[3], mixer_reg[7]);
			waveartist_cmd3(devc, WACMD_SET_MIXER, mixer_reg[8], mixer_reg[9]);

			waveartist_cmd3(devc, WACMD_SET_LEVEL, mixer_reg[10], mixer_reg[11]);
			waveartist_cmd3(devc, WACMD_SET_LEVEL, mixer_reg[12], mixer_reg[13]);
			break;

		case MIXER_PRIVATE3_READ:
			spin_lock_irqsave(&waveartist_lock, flags);

			for (i = 0x30; i < 14 << 8; i += 1 << 8)
				waveartist_cmd(devc, 1, &i, 1, mixer_reg + (i >> 8));

			spin_unlock_irqrestore(&waveartist_lock, flags);

			if (copy_to_user((void *)val, mixer_reg, sizeof(mixer_reg)))
				return -EFAULT;
			break;

		default:
			return -EINVAL;
		}
		return 0;
	}

	/* read back the state from PRIVATE1 */
	case SOUND_MIXER_PRIVATE4:
		val = (devc->spkr_mute_state  ? VNC_MUTE_INTERNAL_SPKR : 0) |
		      (devc->line_mute_state  ? VNC_MUTE_LINE_OUT      : 0) |
		      (devc->handset_detect   ? VNC_HANDSET_DETECT     : 0) |
		      (devc->telephone_detect ? VNC_PHONE_DETECT       : 0) |
		      (devc->no_autoselect    ? VNC_DISABLE_AUTOSWITCH : 0);

		return put_user(val, (int *)arg) ? -EFAULT : 0;
	}

	if (_SIOC_DIR(cmd) & _SIOC_WRITE) {
		/*
		 * special case for master volume: if we
		 * received this call - switch from hw
		 * volume control to a software volume
		 * control, till the hw volume is modified
		 * to signal that user wants to be back in
		 * hardware...
		 */
		if ((cmd & 0xff) == SOUND_MIXER_VOLUME)
			devc->use_slider = 0;

		/* speaker output            */
		if ((cmd & 0xff) == SOUND_MIXER_SPEAKER) {
			unsigned int val, l, r;

			if (get_user(val, (int *)arg))
				return -EFAULT;

			l = val & 0x7f;
			r = (val & 0x7f00) >> 8;
			val = (l + r) / 2;
			devc->levels[SOUND_MIXER_SPEAKER] = val | (val << 8);
			devc->spkr_mute_state = (val <= 50);
			vnc_mute_spkr(devc);
			return 0;
		}
	}

	return -ENOIOCTLCMD;
}

#endif

static struct address_info cfg;

static int attached;

static int __initdata io = 0;
static int __initdata irq = 0;
static int __initdata dma = 0;
static int __initdata dma2 = 0;


static int __init init_waveartist(void)
{
	const struct waveartist_mixer_info *mix;

	if (!io && machine_is_netwinder()) {
		/*
		 * The NetWinder WaveArtist is at a fixed address.
		 * If the user does not supply an address, use the
		 * well-known parameters.
		 */
		io   = 0x250;
		irq  = 12;
		dma  = 3;
		dma2 = 7;
	}

	mix = &waveartist_mixer;
#ifdef CONFIG_ARCH_NETWINDER
	if (machine_is_netwinder())
		mix = &netwinder_mixer;
#endif

	cfg.io_base = io;
	cfg.irq = irq;
	cfg.dma = dma;
	cfg.dma2 = dma2;

	if (!probe_waveartist(&cfg))
		return -ENODEV;

	attach_waveartist(&cfg, mix);
	attached = 1;

	return 0;
}

static void __exit cleanup_waveartist(void)
{
	if (attached)
		unload_waveartist(&cfg);
}

module_init(init_waveartist);
module_exit(cleanup_waveartist);

#ifndef MODULE
static int __init setup_waveartist(char *str)
{
	/* io, irq, dma, dma2 */
	int ints[5];
	
	str = get_options(str, ARRAY_SIZE(ints), ints);
	
	io	= ints[1];
	irq	= ints[2];
	dma	= ints[3];
	dma2	= ints[4];

	return 1;
}
__setup("waveartist=", setup_waveartist);
#endif

MODULE_DESCRIPTION("Rockwell WaveArtist RWA-010 sound driver");
MODULE_PARM(io, "i");		/* IO base */
MODULE_PARM(irq, "i");		/* IRQ */
MODULE_PARM(dma, "i");		/* DMA */
MODULE_PARM(dma2, "i");		/* DMA2 */
MODULE_LICENSE("GPL");