azt3328.c

Linux Kernel 2.6.9 for OMAP1710

static int snd_azf3328_playback_prepare(snd_pcm_substream_t *substream)
{
#if 0
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);
#endif

	snd_azf3328_dbgcallenter();
#if 0
	snd_azf3328_setfmt(chip, IDX_IO_PLAY_SOUNDFORMAT, runtime->rate, snd_pcm_format_width(runtime->format), runtime->channels);
	snd_azf3328_setdmaa(chip, runtime->dma_addr, count, size, 0);
#endif
	snd_azf3328_dbgcallleave();
	return 0;
}

static int snd_azf3328_capture_prepare(snd_pcm_substream_t * substream)
{
#if 0
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
        unsigned int size = snd_pcm_lib_buffer_bytes(substream);
	unsigned int count = snd_pcm_lib_period_bytes(substream);
#endif

	snd_azf3328_dbgcallenter();
#if 0
	snd_azf3328_setfmt(chip, IDX_IO_REC_SOUNDFORMAT, runtime->rate, snd_pcm_format_width(runtime->format), runtime->channels);
	snd_azf3328_setdmaa(chip, runtime->dma_addr, count, size, 1);
#endif
	snd_azf3328_dbgcallleave();
	return 0;
}

static int snd_azf3328_playback_trigger(snd_pcm_substream_t * substream, int cmd)
{
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int result = 0;
	unsigned int status1;

	snd_azf3328_dbgcalls("snd_azf3328_playback_trigger cmd %d\n", cmd);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:

		snd_azf3328_dbgio(chip, "trigger1");

		/* mute WaveOut */
		snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 1);

		snd_azf3328_setfmt(chip, IDX_IO_PLAY_SOUNDFORMAT, runtime->rate, snd_pcm_format_width(runtime->format), runtime->channels);

		spin_lock(&chip->reg_lock);
		/* stop playback */
		status1 = inw(chip->codec_port+IDX_IO_PLAY_FLAGS);
		status1 &= ~DMA_RESUME;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);
	    
		/* FIXME: clear interrupts or what??? */
		outw(0xffff, chip->codec_port+IDX_IO_PLAY_IRQMASK);
		spin_unlock(&chip->reg_lock);

		snd_azf3328_setdmaa(chip, runtime->dma_addr, snd_pcm_lib_period_bytes(substream), snd_pcm_lib_buffer_bytes(substream), 0);

		spin_lock(&chip->reg_lock);
#ifdef WIN9X
		/* FIXME: enable playback/recording??? */
		status1 |= DMA_PLAY_SOMETHING1 | DMA_PLAY_SOMETHING2;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);

		/* start playback again */
		/* FIXME: what is this value (0x0010)??? */
		status1 |= DMA_RESUME | DMA_EPILOGUE_SOMETHING;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);
#else /* NT4 */
		outw(0x00, chip->codec_port+IDX_IO_PLAY_FLAGS);
		outw(DMA_PLAY_SOMETHING1, chip->codec_port+IDX_IO_PLAY_FLAGS);
		outw(DMA_PLAY_SOMETHING1|DMA_PLAY_SOMETHING2, chip->codec_port+IDX_IO_PLAY_FLAGS);
		outw(DMA_RESUME|SOMETHING_ALMOST_ALWAYS_SET|DMA_EPILOGUE_SOMETHING|DMA_SOMETHING_ELSE, chip->codec_port+IDX_IO_PLAY_FLAGS);
#endif
		spin_unlock(&chip->reg_lock);

		/* now unmute WaveOut */
		snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 0);

		snd_azf3328_dbgio(chip, "trigger2");
		chip->is_playing = 1;
		break;
        case SNDRV_PCM_TRIGGER_STOP:
		/* mute WaveOut */
		snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 1);

		spin_lock(&chip->reg_lock);
		/* stop playback */
		status1 = inw(chip->codec_port+IDX_IO_PLAY_FLAGS);

		status1 &= ~DMA_RESUME;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);

		status1 |= DMA_PLAY_SOMETHING1;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);

		status1 &= ~DMA_PLAY_SOMETHING1;
		outw(status1, chip->codec_port+IDX_IO_PLAY_FLAGS);
		spin_unlock(&chip->reg_lock);
	    
		/* now unmute WaveOut */
		snd_azf3328_mixer_set_mute(chip, IDX_MIXER_WAVEOUT, 0);
		chip->is_playing = 0;
		break;
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		snd_printk("FIXME: SNDRV_PCM_TRIGGER_PAUSE_PUSH NIY!\n");
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		snd_printk("FIXME: SNDRV_PCM_TRIGGER_PAUSE_RELEASE NIY!\n");
                break;
        default:
                return -EINVAL;
	}
	
	snd_azf3328_dbgcallleave();
	return result;
}

/* this is just analogous to playback; I'm not quite sure whether recording
 * should actually be triggered like that */
static int snd_azf3328_capture_trigger(snd_pcm_substream_t * substream, int cmd)
{
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	int result = 0;
	unsigned int status1;

	snd_azf3328_dbgcalls("snd_azf3328_capture_trigger cmd %d\n", cmd);
        switch (cmd) {
        case SNDRV_PCM_TRIGGER_START:

		snd_azf3328_dbgio(chip, "trigger1");

		snd_azf3328_setfmt(chip, IDX_IO_REC_SOUNDFORMAT, runtime->rate, snd_pcm_format_width(runtime->format), runtime->channels);

		spin_lock(&chip->reg_lock);
		/* stop recording */
		status1 = inw(chip->codec_port+IDX_IO_REC_FLAGS);
		status1 &= ~DMA_RESUME;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);
	    
		/* FIXME: clear interrupts or what??? */
		outw(0xffff, chip->codec_port+IDX_IO_REC_IRQMASK);
		spin_unlock(&chip->reg_lock);

		snd_azf3328_setdmaa(chip, runtime->dma_addr, snd_pcm_lib_period_bytes(substream), snd_pcm_lib_buffer_bytes(substream), 1);

		spin_lock(&chip->reg_lock);
#ifdef WIN9X
		/* FIXME: enable playback/recording??? */
		status1 |= DMA_PLAY_SOMETHING1 | DMA_PLAY_SOMETHING2;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);

		/* start playback again */
		/* FIXME: what is this value (0x0010)??? */
		status1 |= DMA_RESUME | DMA_EPILOGUE_SOMETHING;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);
#else
		outw(0x00, chip->codec_port+IDX_IO_REC_FLAGS);
		outw(DMA_PLAY_SOMETHING1, chip->codec_port+IDX_IO_REC_FLAGS);
		outw(DMA_PLAY_SOMETHING1|DMA_PLAY_SOMETHING2, chip->codec_port+IDX_IO_REC_FLAGS);
		outw(DMA_RESUME|SOMETHING_ALMOST_ALWAYS_SET|DMA_EPILOGUE_SOMETHING|DMA_SOMETHING_ELSE, chip->codec_port+IDX_IO_REC_FLAGS);
#endif
		spin_unlock(&chip->reg_lock);

		snd_azf3328_dbgio(chip, "trigger2");
		chip->is_playing = 1;
		break;
        case SNDRV_PCM_TRIGGER_STOP:
		spin_lock(&chip->reg_lock);
		/* stop recording */
		status1 = inw(chip->codec_port+IDX_IO_REC_FLAGS);

		status1 &= ~DMA_RESUME;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);

		status1 |= DMA_PLAY_SOMETHING1;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);

		status1 &= ~DMA_PLAY_SOMETHING1;
		outw(status1, chip->codec_port+IDX_IO_REC_FLAGS);
		spin_unlock(&chip->reg_lock);
	    
		chip->is_playing = 0;
		break;
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		snd_printk("FIXME: SNDRV_PCM_TRIGGER_PAUSE_PUSH NIY!\n");
                break;
        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		snd_printk("FIXME: SNDRV_PCM_TRIGGER_PAUSE_RELEASE NIY!\n");
                break;
        default:
                return -EINVAL;
	}
	
	snd_azf3328_dbgcallleave();
	return result;
}

static snd_pcm_uframes_t snd_azf3328_playback_pointer(snd_pcm_substream_t * substream)
{
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	unsigned long bufptr, playptr;
	unsigned long result;
	snd_pcm_uframes_t frmres;

#ifdef QUERY_HARDWARE
	bufptr = inl(chip->codec_port+IDX_IO_PLAY_DMA_START_1);
#else
	bufptr = substream->runtime->dma_addr;
#endif
	playptr = inl(chip->codec_port+IDX_IO_PLAY_DMA_CURRPOS);

	result = playptr - bufptr;
	frmres = bytes_to_frames( substream->runtime, result );
	snd_azf3328_dbgplay("result %lx, playptr %lx (base %x), frames %ld\n", result, playptr, substream->runtime->dma_addr, frmres);
	return frmres;
}

static snd_pcm_uframes_t snd_azf3328_capture_pointer(snd_pcm_substream_t * substream)
{
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	unsigned long bufptr, recptr;
	unsigned long result;
	snd_pcm_uframes_t frmres;

#ifdef QUERY_HARDWARE
	bufptr = inl(chip->codec_port+IDX_IO_REC_DMA_START_1);
#else
	bufptr = substream->runtime->dma_addr;
#endif
	recptr = inl(chip->codec_port+IDX_IO_REC_DMA_CURRPOS);

	result = recptr - bufptr;
	frmres = bytes_to_frames( substream->runtime, result );
	snd_azf3328_dbgplay("result %lx, rec ptr %lx (base %x), frames %ld\n", result, recptr, substream->runtime->dma_addr, frmres);
	return frmres;
}

static irqreturn_t snd_azf3328_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	azf3328_t *chip = dev_id;
	unsigned int status, which;
	static unsigned long count;

	status  = inw(chip->codec_port+IDX_IO_IRQSTATUS);

        /* fast path out, to ease interrupt sharing */
	if (!(status & (IRQ_PLAYBACK|IRQ_RECORDING|IRQ_MPU401|IRQ_SOMEIRQ)))
		return IRQ_NONE; /* must be interrupt for another device */

	snd_azf3328_dbgplay("Interrupt %ld!\nIDX_IO_PLAY_FLAGS %04x, IDX_IO_PLAY_IRQMASK %04x, IDX_IO_IRQSTATUS %04x\n", count, inw(chip->codec_port+IDX_IO_PLAY_FLAGS), inw(chip->codec_port+IDX_IO_PLAY_IRQMASK), inw(chip->codec_port+IDX_IO_IRQSTATUS));
		
	if (status & IRQ_PLAYBACK)
	{
		spin_lock(&chip->reg_lock);
		which = inw(chip->codec_port+IDX_IO_PLAY_IRQMASK);
		if (which & IRQ_FINISHED_PLAYBUF_1)
			/* ack IRQ */
			outw(which | IRQ_FINISHED_PLAYBUF_1, chip->codec_port+IDX_IO_PLAY_IRQMASK);
		if (which & IRQ_FINISHED_PLAYBUF_2)
			/* ack IRQ */
			outw(which | IRQ_FINISHED_PLAYBUF_2, chip->codec_port+IDX_IO_PLAY_IRQMASK);
		if (which & IRQ_PLAY_SOMETHING)
		{
			snd_azf3328_dbgplay("azt3328: unknown play IRQ type occurred, please report!\n");
		}
		if (chip->pcm && chip->playback_substream)
		{
			snd_azf3328_dbgplay("which %x, playptr %lx\n", which, inl(chip->codec_port+IDX_IO_PLAY_DMA_CURRPOS));
			snd_pcm_period_elapsed(chip->playback_substream);
			snd_azf3328_dbgplay("period done, playptr %lx.\n", inl(chip->codec_port+IDX_IO_PLAY_DMA_CURRPOS));
		}
		else
			snd_azf3328_dbgplay("azt3328: ouch, irq handler problem!\n");
               	spin_unlock(&chip->reg_lock);
	}
	if (status & IRQ_RECORDING)
	{
                spin_lock(&chip->reg_lock);
		which = inw(chip->codec_port+IDX_IO_REC_IRQMASK);
		if (which & IRQ_FINISHED_RECBUF_1)
			/* ack interrupt */
			outw(which | IRQ_FINISHED_RECBUF_1, chip->codec_port+IDX_IO_REC_IRQMASK);
		if (which & IRQ_FINISHED_RECBUF_2)
			/* ack interrupt */
			outw(which | IRQ_FINISHED_RECBUF_2, chip->codec_port+IDX_IO_REC_IRQMASK);
		if (which & IRQ_REC_SOMETHING)
		{
			snd_azf3328_dbgplay("azt3328: unknown rec IRQ type occurred, please report!\n");
		}
		if (chip->pcm && chip->capture_substream)
		{
			snd_azf3328_dbgplay("which %x, recptr %lx\n", which, inl(chip->codec_port+IDX_IO_REC_DMA_CURRPOS));
			spin_unlock(&chip->reg_lock);
			snd_pcm_period_elapsed(chip->capture_substream);
			spin_lock(&chip->reg_lock);
			snd_azf3328_dbgplay("period done, recptr %lx.\n", inl(chip->codec_port+IDX_IO_REC_DMA_CURRPOS));
		}
               	spin_unlock(&chip->reg_lock);
	}
	if (status & IRQ_MPU401)
		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
	if (status & IRQ_SOMEIRQ)
		snd_azf3328_dbgplay("azt3328: unknown IRQ type occurred, please report!\n");
	count++;
	return IRQ_HANDLED;
}

/*****************************************************************/

static snd_pcm_hardware_t snd_azf3328_playback =
{
	/* FIXME!! Correct? */
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,
	.rates =		SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_KNOT,
	.rate_min =		5512,
	.rate_max =		64000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	/* FIXME: maybe that card actually has a FIFO?
	 * Hmm, it seems newer revisions do have one, but we still don't know
	 * its size... */
	.fifo_size =		0,
};

static snd_pcm_hardware_t snd_azf3328_capture =
{
	/* FIXME */
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,
	.rates =		SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_64000 | SNDRV_PCM_RATE_KNOT,
	.rate_min =		5512,
	.rate_max =		64000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	65536,
	.period_bytes_min =	64,
	.period_bytes_max =	65536,
	.periods_min =		1,
	.periods_max =		1024,
	.fifo_size =		0,
};


static unsigned int snd_azf3328_fixed_rates[] = {
	5512, 6620, 8000, 9600, 11025, 16000, 22050, 32000, 44100, 48000, 64000
};
static snd_pcm_hw_constraint_list_t snd_azf3328_hw_constraints_rates = {
	.count = ARRAY_SIZE(snd_azf3328_fixed_rates), 
	.list = snd_azf3328_fixed_rates,
	.mask = 0,
};

/*****************************************************************/

static int snd_azf3328_playback_open(snd_pcm_substream_t * substream)
{
	azf3328_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;

	snd_azf3328_dbgcallenter();
	chip->playback_substream = substream;
	runtime->hw = snd_azf3328_playback;