usbusx2yaudio.c

linux-2.6.15.6

		err = 0;
		wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
		if (atomic_read(&subs->state) != state_PREPARED) {
			err = -EPIPE;
		}

	cleanup:
		if (err) {
			usX2Y_subs_startup_finish(usX2Y);
			usX2Y_clients_stop(usX2Y);		// something is completely wroong > stop evrything
		}
	}
	return err;
}

/*
 * return the current pcm pointer.  just return the hwptr_done value.
 */
static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(snd_pcm_substream_t *substream)
{
	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
	return subs->hwptr_done;
}
/*
 * start/stop substream
 */
static int snd_usX2Y_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
{
	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
		if (atomic_read(&subs->state) == state_PREPARED &&
		    atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
			atomic_set(&subs->state, state_PRERUNNING);
		} else {
			snd_printdd("\n");
			return -EPIPE;
		}
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
		if (atomic_read(&subs->state) >= state_PRERUNNING)
			atomic_set(&subs->state, state_PREPARED);
		break;
	default:
		return -EINVAL;
	}
	return 0;
}


/*
 * allocate a buffer, setup samplerate
 *
 * so far we use a physically linear buffer although packetize transfer
 * doesn't need a continuous area.
 * if sg buffer is supported on the later version of alsa, we'll follow
 * that.
 */
static struct s_c2
{
	char c1, c2;
}
	SetRate44100[] =
{
	{ 0x14, 0x08},	// this line sets 44100, well actually a little less
	{ 0x18, 0x40},	// only tascam / frontier design knows the further lines .......
	{ 0x18, 0x42},
	{ 0x18, 0x45},
	{ 0x18, 0x46},
	{ 0x18, 0x48},
	{ 0x18, 0x4A},
	{ 0x18, 0x4C},
	{ 0x18, 0x4E},
	{ 0x18, 0x50},
	{ 0x18, 0x52},
	{ 0x18, 0x54},
	{ 0x18, 0x56},
	{ 0x18, 0x58},
	{ 0x18, 0x5A},
	{ 0x18, 0x5C},
	{ 0x18, 0x5E},
	{ 0x18, 0x60},
	{ 0x18, 0x62},
	{ 0x18, 0x64},
	{ 0x18, 0x66},
	{ 0x18, 0x68},
	{ 0x18, 0x6A},
	{ 0x18, 0x6C},
	{ 0x18, 0x6E},
	{ 0x18, 0x70},
	{ 0x18, 0x72},
	{ 0x18, 0x74},
	{ 0x18, 0x76},
	{ 0x18, 0x78},
	{ 0x18, 0x7A},
	{ 0x18, 0x7C},
	{ 0x18, 0x7E}
};
static struct s_c2 SetRate48000[] =
{
	{ 0x14, 0x09},	// this line sets 48000, well actually a little less
	{ 0x18, 0x40},	// only tascam / frontier design knows the further lines .......
	{ 0x18, 0x42},
	{ 0x18, 0x45},
	{ 0x18, 0x46},
	{ 0x18, 0x48},
	{ 0x18, 0x4A},
	{ 0x18, 0x4C},
	{ 0x18, 0x4E},
	{ 0x18, 0x50},
	{ 0x18, 0x52},
	{ 0x18, 0x54},
	{ 0x18, 0x56},
	{ 0x18, 0x58},
	{ 0x18, 0x5A},
	{ 0x18, 0x5C},
	{ 0x18, 0x5E},
	{ 0x18, 0x60},
	{ 0x18, 0x62},
	{ 0x18, 0x64},
	{ 0x18, 0x66},
	{ 0x18, 0x68},
	{ 0x18, 0x6A},
	{ 0x18, 0x6C},
	{ 0x18, 0x6E},
	{ 0x18, 0x70},
	{ 0x18, 0x73},
	{ 0x18, 0x74},
	{ 0x18, 0x76},
	{ 0x18, 0x78},
	{ 0x18, 0x7A},
	{ 0x18, 0x7C},
	{ 0x18, 0x7E}
};
#define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)

static void i_usX2Y_04Int(struct urb* urb, struct pt_regs *regs)
{
	usX2Ydev_t*	usX2Y = urb->context;
	
	if (urb->status)
		snd_printk(KERN_ERR "snd_usX2Y_04Int() urb->status=%i\n", urb->status);
	if (0 == --usX2Y->US04->len)
		wake_up(&usX2Y->In04WaitQueue);
}

static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
{
	int			err = 0, i;
	snd_usX2Y_urbSeq_t	*us = NULL;
	int			*usbdata = NULL;
	struct s_c2		*ra = rate == 48000 ? SetRate48000 : SetRate44100;

	if (usX2Y->rate != rate) {
		us = kmalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
		if (NULL == us) {
			err = -ENOMEM;
			goto cleanup;
		}
		memset(us, 0, sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS); 
		usbdata = kmalloc(sizeof(int)*NOOF_SETRATE_URBS, GFP_KERNEL);
		if (NULL == usbdata) {
			err = -ENOMEM;
			goto cleanup;
		}
		for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
			if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
				err = -ENOMEM;
				goto cleanup;
			}
			((char*)(usbdata + i))[0] = ra[i].c1;
			((char*)(usbdata + i))[1] = ra[i].c2;
			usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
					  usbdata + i, 2, i_usX2Y_04Int, usX2Y);
#ifdef OLD_USB
			us->urb[i]->transfer_flags = USB_QUEUE_BULK;
#endif
		}
		us->submitted =	0;
		us->len =	NOOF_SETRATE_URBS;
		usX2Y->US04 =	us;
		wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
		usX2Y->US04 =	NULL;
		if (us->len)
			err = -ENODEV;
	cleanup:
		if (us) {
			us->submitted =	2*NOOF_SETRATE_URBS;
			for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
				struct urb *urb = us->urb[i];
				if (urb->status) {
					if (!err)
						err = -ENODEV;
					usb_kill_urb(urb);
				}
				usb_free_urb(urb);
			}
			usX2Y->US04 = NULL;
			kfree(usbdata);
			kfree(us);
			if (!err) {
				usX2Y->rate = rate;
			}
		}
	}

	return err;
}


static int usX2Y_format_set(usX2Ydev_t *usX2Y, snd_pcm_format_t format)
{
	int alternate, err;
	struct list_head* p;
	if (format == SNDRV_PCM_FORMAT_S24_3LE) {
		alternate = 2;
		usX2Y->stride = 6;
	} else {
		alternate = 1;
		usX2Y->stride = 4;
	}
	list_for_each(p, &usX2Y->chip.midi_list) {
		snd_usbmidi_input_stop(p);
	}
	usb_kill_urb(usX2Y->In04urb);
	if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
		snd_printk(KERN_ERR "usb_set_interface error \n");
		return err;
	}
	usX2Y->In04urb->dev = usX2Y->chip.dev;
	err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
	list_for_each(p, &usX2Y->chip.midi_list) {
		snd_usbmidi_input_start(p);
	}
	usX2Y->format = format;
	usX2Y->rate = 0;
	return err;
}


static int snd_usX2Y_pcm_hw_params(snd_pcm_substream_t *substream,
				   snd_pcm_hw_params_t *hw_params)
{
	int			err = 0;
	unsigned int		rate = params_rate(hw_params);
	snd_pcm_format_t	format = params_format(hw_params);
	snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);

	{	// all pcm substreams off one usX2Y have to operate at the same rate & format
		snd_card_t *card = substream->pstr->pcm->card;
		struct list_head *list;
		list_for_each(list, &card->devices) {
			snd_device_t *dev;
			snd_pcm_t *pcm;
			int s;
			dev = snd_device(list);
			if (dev->type != SNDRV_DEV_PCM)
				continue;
			pcm = dev->device_data;
			for (s = 0; s < 2; ++s) {
				snd_pcm_substream_t *test_substream;
				test_substream = pcm->streams[s].substream;
				if (test_substream && test_substream != substream  &&
				    test_substream->runtime &&
				    ((test_substream->runtime->format &&
				      test_substream->runtime->format != format) ||
				     (test_substream->runtime->rate &&
				      test_substream->runtime->rate != rate)))
					return -EINVAL;
			}
		}
	}
	if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
		snd_printk(KERN_ERR "snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", substream, params_buffer_bytes(hw_params), err);
		return err;
	}
	return 0;
}

/*
 * free the buffer
 */
static int snd_usX2Y_pcm_hw_free(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
	down(&subs->usX2Y->prepare_mutex);
	snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);

	if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
		snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
		atomic_set(&subs->state, state_STOPPED);
		usX2Y_urbs_release(subs);
		if (!cap_subs->pcm_substream ||
		    !cap_subs->pcm_substream->runtime ||
		    !cap_subs->pcm_substream->runtime->status ||
		    cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
			atomic_set(&cap_subs->state, state_STOPPED);
			usX2Y_urbs_release(cap_subs);
		}
	} else {
		snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
		if (atomic_read(&playback_subs->state) < state_PREPARED) {
			atomic_set(&subs->state, state_STOPPED);
			usX2Y_urbs_release(subs);
		}
	}
	up(&subs->usX2Y->prepare_mutex);
	return snd_pcm_lib_free_pages(substream);
}
/*
 * prepare callback
 *
 * set format and initialize urbs
 */
static int snd_usX2Y_pcm_prepare(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
	usX2Ydev_t *usX2Y = subs->usX2Y;
	snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
	int err = 0;
	snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);

	down(&usX2Y->prepare_mutex);
	usX2Y_subs_prepare(subs);
// Start hardware streams
// SyncStream first....
	if (atomic_read(&capsubs->state) < state_PREPARED) {
		if (usX2Y->format != runtime->format)
			if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
				goto up_prepare_mutex;
		if (usX2Y->rate != runtime->rate)
			if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
				goto up_prepare_mutex;
		snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
		if (0 > (err = usX2Y_urbs_start(capsubs)))
			goto up_prepare_mutex;
	}

	if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
		err = usX2Y_urbs_start(subs);

 up_prepare_mutex:
	up(&usX2Y->prepare_mutex);
	return err;
}

static snd_pcm_hardware_t snd_usX2Y_2c =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
	.rates =                   SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
	.rate_min =                44100,
	.rate_max =                48000,
	.channels_min =            2,
	.channels_max =            2,
	.buffer_bytes_max =	(2*128*1024),
	.period_bytes_min =	64,
	.period_bytes_max =	(128*1024),
	.periods_min =		2,
	.periods_max =		1024,
	.fifo_size =              0
};



static int snd_usX2Y_pcm_open(snd_pcm_substream_t *substream)
{
	snd_usX2Y_substream_t	*subs = ((snd_usX2Y_substream_t **)
					 snd_pcm_substream_chip(substream))[substream->stream];
	snd_pcm_runtime_t	*runtime = substream->runtime;

	if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
		return -EBUSY;

	runtime->hw = snd_usX2Y_2c;
	runtime->private_data = subs;
	subs->pcm_substream = substream;
	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
	return 0;
}



static int snd_usX2Y_pcm_close(snd_pcm_substream_t *substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
	int err = 0;

	subs->pcm_substream = NULL;

	return err;
}


static snd_pcm_ops_t snd_usX2Y_pcm_ops = 
{
	.open =		snd_usX2Y_pcm_open,
	.close =	snd_usX2Y_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_usX2Y_pcm_hw_params,
	.hw_free =	snd_usX2Y_pcm_hw_free,
	.prepare =	snd_usX2Y_pcm_prepare,
	.trigger =	snd_usX2Y_pcm_trigger,
	.pointer =	snd_usX2Y_pcm_pointer,
};


/*
 * free a usb stream instance
 */
static void usX2Y_audio_stream_free(snd_usX2Y_substream_t **usX2Y_substream)
{
	if (NULL != usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]) {
		kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
		usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
	}
	kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
	usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
}

static void snd_usX2Y_pcm_private_free(snd_pcm_t *pcm)
{
	snd_usX2Y_substream_t **usX2Y_stream = pcm->private_data;
	if (usX2Y_stream) {
		snd_pcm_lib_preallocate_free_for_all(pcm);
		usX2Y_audio_stream_free(usX2Y_stream);
	}
}

static int usX2Y_audio_stream_new(snd_card_t *card, int playback_endpoint, int capture_endpoint)
{
	snd_pcm_t *pcm;
	int err, i;
	snd_usX2Y_substream_t **usX2Y_substream =
		usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;

	for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
	     i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
		usX2Y_substream[i] = kzalloc(sizeof(snd_usX2Y_substream_t), GFP_KERNEL);
		if (NULL == usX2Y_substream[i]) {
			snd_printk(KERN_ERR "cannot malloc\n");
			return -ENOMEM;
		}
		usX2Y_substream[i]->usX2Y = usX2Y(card);
	}

	if (playback_endpoint)
		usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
	usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;

	err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
			  playback_endpoint ? 1 : 0, 1,
			  &pcm);
	if (err < 0) {
		usX2Y_audio_stream_free(usX2Y_substream);
		return err;
	}

	if (playback_endpoint)
		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);

	pcm->private_data = usX2Y_substream;
	pcm->private_free = snd_usX2Y_pcm_private_free;
	pcm->info_flags = 0;

	sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);

	if ((playback_endpoint &&
	     0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
						     SNDRV_DMA_TYPE_CONTINUOUS,
						     snd_dma_continuous_data(GFP_KERNEL),
						     64*1024, 128*1024))) ||
	    0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
	    					     SNDRV_DMA_TYPE_CONTINUOUS,
	    					     snd_dma_continuous_data(GFP_KERNEL),
						     64*1024, 128*1024))) {
		snd_usX2Y_pcm_private_free(pcm);
		return err;
	}
	usX2Y(card)->chip.pcm_devs++;

	return 0;
}

/*
 * create a chip instance and set its names.
 */
int usX2Y_audio_create(snd_card_t* card)
{
	int err = 0;
	
	INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);

	if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
		return err;
	if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
	     if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
		     return err;
	if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
		err = usX2Y_rate_set(usX2Y(card), 44100);	// Lets us428 recognize output-volume settings, disturbs us122.
	return err;
}