[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / line6 / pcm.c

/*
 * Line6 Linux USB driver - 0.9.1beta
 *
 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License as
 *	published by the Free Software Foundation, version 2.
 *
 */

#include <linux/slab.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>

#include "audio.h"
#include "capture.h"
#include "driver.h"
#include "playback.h"
#include "pod.h"

#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE

static struct snd_line6_pcm *dev2pcm(struct device *dev)
{
	struct usb_interface *interface = to_usb_interface(dev);
	struct usb_line6 *line6 = usb_get_intfdata(interface);
	struct snd_line6_pcm *line6pcm = line6->line6pcm;
	return line6pcm;
}

/*
	"read" request on "impulse_volume" special file.
*/
static ssize_t pcm_get_impulse_volume(struct device *dev,
				      struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_volume);
}

/*
	"write" request on "impulse_volume" special file.
*/
static ssize_t pcm_set_impulse_volume(struct device *dev,
				      struct device_attribute *attr,
				      const char *buf, size_t count)
{
	struct snd_line6_pcm *line6pcm = dev2pcm(dev);
	int value;
	int rv;

	rv = kstrtoint(buf, 10, &value);
	if (rv < 0)
		return rv;

	line6pcm->impulse_volume = value;

	if (value > 0)
		line6_pcm_acquire(line6pcm, LINE6_BITS_PCM_IMPULSE);
	else
		line6_pcm_release(line6pcm, LINE6_BITS_PCM_IMPULSE);

	return count;
}

/*
	"read" request on "impulse_period" special file.
*/
static ssize_t pcm_get_impulse_period(struct device *dev,
				      struct device_attribute *attr, char *buf)
{
	return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_period);
}

/*
	"write" request on "impulse_period" special file.
*/
static ssize_t pcm_set_impulse_period(struct device *dev,
				      struct device_attribute *attr,
				      const char *buf, size_t count)
{
	dev2pcm(dev)->impulse_period = simple_strtoul(buf, NULL, 10);
	return count;
}

static DEVICE_ATTR(impulse_volume, S_IWUSR | S_IRUGO, pcm_get_impulse_volume,
		   pcm_set_impulse_volume);
static DEVICE_ATTR(impulse_period, S_IWUSR | S_IRUGO, pcm_get_impulse_period,
		   pcm_set_impulse_period);

#endif

static bool test_flags(unsigned long flags0, unsigned long flags1,
		       unsigned long mask)
{
	return ((flags0 & mask) == 0) && ((flags1 & mask) != 0);
}

int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels)
{
	unsigned long flags_old =
	    __sync_fetch_and_or(&line6pcm->flags, channels);
	unsigned long flags_new = flags_old | channels;
	unsigned long flags_final = flags_old;
	int err = 0;

	line6pcm->prev_fbuf = NULL;

	if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_BUFFER)) {
		/* We may be invoked multiple times in a row so allocate once only */
		if (!line6pcm->buffer_in) {
			line6pcm->buffer_in =
				kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
					line6pcm->max_packet_size, GFP_KERNEL);

			if (!line6pcm->buffer_in) {
				dev_err(line6pcm->line6->ifcdev,
					"cannot malloc capture buffer\n");
				err = -ENOMEM;
				goto pcm_acquire_error;
			}

			flags_final |= channels & LINE6_BITS_CAPTURE_BUFFER;
		}
	}

	if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_STREAM)) {
		/*
		   Waiting for completion of active URBs in the stop handler is
		   a bug, we therefore report an error if capturing is restarted
		   too soon.
		 */
		if (line6pcm->active_urb_in | line6pcm->unlink_urb_in) {
			dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
			return -EBUSY;
		}

		line6pcm->count_in = 0;
		line6pcm->prev_fsize = 0;
		err = line6_submit_audio_in_all_urbs(line6pcm);

		if (err < 0)
			goto pcm_acquire_error;

		flags_final |= channels & LINE6_BITS_CAPTURE_STREAM;
	}

	if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_BUFFER)) {
		/* We may be invoked multiple times in a row so allocate once only */
		if (!line6pcm->buffer_out) {
			line6pcm->buffer_out =
				kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
					line6pcm->max_packet_size, GFP_KERNEL);

			if (!line6pcm->buffer_out) {
				dev_err(line6pcm->line6->ifcdev,
					"cannot malloc playback buffer\n");
				err = -ENOMEM;
				goto pcm_acquire_error;
			}

			flags_final |= channels & LINE6_BITS_PLAYBACK_BUFFER;
		}
	}

	if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_STREAM)) {
		/*
		  See comment above regarding PCM restart.
		*/
		if (line6pcm->active_urb_out | line6pcm->unlink_urb_out) {
			dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
			return -EBUSY;
		}

		line6pcm->count_out = 0;
		err = line6_submit_audio_out_all_urbs(line6pcm);

		if (err < 0)
			goto pcm_acquire_error;

		flags_final |= channels & LINE6_BITS_PLAYBACK_STREAM;
	}

	return 0;

pcm_acquire_error:
	/*
	   If not all requested resources/streams could be obtained, release
	   those which were successfully obtained (if any).
	*/
	line6_pcm_release(line6pcm, flags_final & channels);
	return err;
}

int line6_pcm_release(struct snd_line6_pcm *line6pcm, int channels)
{
	unsigned long flags_old =
	    __sync_fetch_and_and(&line6pcm->flags, ~channels);
	unsigned long flags_new = flags_old & ~channels;

	if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_STREAM))
		line6_unlink_audio_in_urbs(line6pcm);

	if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_BUFFER)) {
		line6_wait_clear_audio_in_urbs(line6pcm);
		line6_free_capture_buffer(line6pcm);
	}

	if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_STREAM))
		line6_unlink_audio_out_urbs(line6pcm);

	if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_BUFFER)) {
		line6_wait_clear_audio_out_urbs(line6pcm);
		line6_free_playback_buffer(line6pcm);
	}

	return 0;
}

/* trigger callback */
int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
	struct snd_pcm_substream *s;
	int err;
	unsigned long flags;

	spin_lock_irqsave(&line6pcm->lock_trigger, flags);
	clear_bit(LINE6_INDEX_PREPARED, &line6pcm->flags);

	snd_pcm_group_for_each_entry(s, substream) {
		switch (s->stream) {
		case SNDRV_PCM_STREAM_PLAYBACK:
			err = snd_line6_playback_trigger(line6pcm, cmd);

			if (err < 0) {
				spin_unlock_irqrestore(&line6pcm->lock_trigger,
						       flags);
				return err;
			}

			break;

		case SNDRV_PCM_STREAM_CAPTURE:
			err = snd_line6_capture_trigger(line6pcm, cmd);

			if (err < 0) {
				spin_unlock_irqrestore(&line6pcm->lock_trigger,
						       flags);
				return err;
			}

			break;

		default:
			dev_err(line6pcm->line6->ifcdev,
				"Unknown stream direction %d\n", s->stream);
		}
	}

	spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
	return 0;
}

/* control info callback */
static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
					   struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 256;
	return 0;
}

/* control get callback */
static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
					  struct snd_ctl_elem_value *ucontrol)
{
	int i;
	struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);

	for (i = 2; i--;)
		ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];

	return 0;
}

/* control put callback */
static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
					  struct snd_ctl_elem_value *ucontrol)
{
	int i, changed = 0;
	struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);

	for (i = 2; i--;)
		if (line6pcm->volume_playback[i] !=
		    ucontrol->value.integer.value[i]) {
			line6pcm->volume_playback[i] =
			    ucontrol->value.integer.value[i];
			changed = 1;
		}

	return changed;
}

/* control definition */
static struct snd_kcontrol_new line6_control_playback = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "PCM Playback Volume",
	.index = 0,
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
	.info = snd_line6_control_playback_info,
	.get = snd_line6_control_playback_get,
	.put = snd_line6_control_playback_put
};

/*
	Cleanup the PCM device.
*/
static void line6_cleanup_pcm(struct snd_pcm *pcm)
{
	int i;
	struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);

#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
	device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
	device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
#endif

	for (i = LINE6_ISO_BUFFERS; i--;) {
		if (line6pcm->urb_audio_out[i]) {
			usb_kill_urb(line6pcm->urb_audio_out[i]);
			usb_free_urb(line6pcm->urb_audio_out[i]);
		}
		if (line6pcm->urb_audio_in[i]) {
			usb_kill_urb(line6pcm->urb_audio_in[i]);
			usb_free_urb(line6pcm->urb_audio_in[i]);
		}
	}
}

/* create a PCM device */
static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
{
	struct snd_pcm *pcm;
	int err;

	err = snd_pcm_new(line6pcm->line6->card,
			  (char *)line6pcm->line6->properties->name,
			  0, 1, 1, &pcm);
	if (err < 0)
		return err;

	pcm->private_data = line6pcm;
	pcm->private_free = line6_cleanup_pcm;
	line6pcm->pcm = pcm;
	strcpy(pcm->name, line6pcm->line6->properties->name);

	/* set operators */
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
			&snd_line6_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);

	/* pre-allocation of buffers */
	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
					      snd_dma_continuous_data
					      (GFP_KERNEL), 64 * 1024,
					      128 * 1024);

	return 0;
}

/* PCM device destructor */
static int snd_line6_pcm_free(struct snd_device *device)
{
	return 0;
}

/*
	Stop substream if still running.
*/
static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
{
	if (substream->runtime && snd_pcm_running(substream))
		snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
}

/*
	Stop PCM stream.
*/
void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
{
	pcm_disconnect_substream(get_substream
				 (line6pcm, SNDRV_PCM_STREAM_CAPTURE));
	pcm_disconnect_substream(get_substream
				 (line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
	line6_unlink_wait_clear_audio_out_urbs(line6pcm);
	line6_unlink_wait_clear_audio_in_urbs(line6pcm);
}

/*
	Create and register the PCM device and mixer entries.
	Create URBs for playback and capture.
*/
int line6_init_pcm(struct usb_line6 *line6,
		   struct line6_pcm_properties *properties)
{
	static struct snd_device_ops pcm_ops = {
		.dev_free = snd_line6_pcm_free,
	};

	int err;
	int ep_read = 0, ep_write = 0;
	struct snd_line6_pcm *line6pcm;

	if (!(line6->properties->capabilities & LINE6_BIT_PCM))
		return 0;	/* skip PCM initialization and report success */

	/* initialize PCM subsystem based on product id: */
	switch (line6->product) {
	case LINE6_DEVID_BASSPODXT:
	case LINE6_DEVID_BASSPODXTLIVE:
	case LINE6_DEVID_BASSPODXTPRO:
	case LINE6_DEVID_PODXT:
	case LINE6_DEVID_PODXTLIVE:
	case LINE6_DEVID_PODXTPRO:
	case LINE6_DEVID_PODHD300:
		ep_read = 0x82;
		ep_write = 0x01;
		break;

	case LINE6_DEVID_PODHD500:
	case LINE6_DEVID_PODX3:
	case LINE6_DEVID_PODX3LIVE:
		ep_read = 0x86;
		ep_write = 0x02;
		break;

	case LINE6_DEVID_POCKETPOD:
		ep_read = 0x82;
		ep_write = 0x02;
		break;

	case LINE6_DEVID_GUITARPORT:
	case LINE6_DEVID_PODSTUDIO_GX:
	case LINE6_DEVID_PODSTUDIO_UX1:
	case LINE6_DEVID_PODSTUDIO_UX2:
	case LINE6_DEVID_TONEPORT_GX:
	case LINE6_DEVID_TONEPORT_UX1:
	case LINE6_DEVID_TONEPORT_UX2:
		ep_read = 0x82;
		ep_write = 0x01;
		break;

		/* this is for interface_number == 1:
		   case LINE6_DEVID_TONEPORT_UX2:
		   case LINE6_DEVID_PODSTUDIO_UX2:
		   ep_read  = 0x87;
		   ep_write = 0x00;
		   break;
		 */

	default:
		MISSING_CASE;
	}

	line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);

	if (line6pcm == NULL)
		return -ENOMEM;

	line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
	line6pcm->volume_monitor = 255;
	line6pcm->line6 = line6;
	line6pcm->ep_audio_read = ep_read;
	line6pcm->ep_audio_write = ep_write;

	/* Read and write buffers are sized identically, so choose minimum */
	line6pcm->max_packet_size = min(
			usb_maxpacket(line6->usbdev,
				usb_rcvisocpipe(line6->usbdev, ep_read), 0),
			usb_maxpacket(line6->usbdev,
				usb_sndisocpipe(line6->usbdev, ep_write), 1));

	line6pcm->properties = properties;
	line6->line6pcm = line6pcm;

	/* PCM device: */
	err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
	if (err < 0)
		return err;

	snd_card_set_dev(line6->card, line6->ifcdev);

	err = snd_line6_new_pcm(line6pcm);
	if (err < 0)
		return err;

	spin_lock_init(&line6pcm->lock_audio_out);
	spin_lock_init(&line6pcm->lock_audio_in);
	spin_lock_init(&line6pcm->lock_trigger);

	err = line6_create_audio_out_urbs(line6pcm);
	if (err < 0)
		return err;

	err = line6_create_audio_in_urbs(line6pcm);
	if (err < 0)
		return err;

	/* mixer: */
	err =
	    snd_ctl_add(line6->card,
			snd_ctl_new1(&line6_control_playback, line6pcm));
	if (err < 0)
		return err;

#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
	/* impulse response test: */
	err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
	if (err < 0)
		return err;

	err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
	if (err < 0)
		return err;

	line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
#endif

	return 0;
}

/* prepare pcm callback */
int snd_line6_prepare(struct snd_pcm_substream *substream)
{
	struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);

	switch (substream->stream) {
	case SNDRV_PCM_STREAM_PLAYBACK:
		if ((line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) == 0)
			line6_unlink_wait_clear_audio_out_urbs(line6pcm);

		break;

	case SNDRV_PCM_STREAM_CAPTURE:
		if ((line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) == 0)
			line6_unlink_wait_clear_audio_in_urbs(line6pcm);

		break;

	default:
		MISSING_CASE;
	}

	if (!test_and_set_bit(LINE6_INDEX_PREPARED, &line6pcm->flags)) {
		line6pcm->count_out = 0;
		line6pcm->pos_out = 0;
		line6pcm->pos_out_done = 0;
		line6pcm->bytes_out = 0;
		line6pcm->count_in = 0;
		line6pcm->pos_in_done = 0;
		line6pcm->bytes_in = 0;
	}

	return 0;
}
Commit	Line	Data
705ececd	1	/*
e1a164d7	2	* Line6 Linux USB driver - 0.9.1beta
705ececd	3	*
1027f476	4	* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
705ececd MG	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License as
	8	* published by the Free Software Foundation, version 2.
	9	*
	10	*/
	11
5a0e3ad6	12	#include <linux/slab.h>
705ececd MG	13	#include <sound/core.h>
	14	#include <sound/control.h>
	15	#include <sound/pcm.h>
	16	#include <sound/pcm_params.h>
	17
	18	#include "audio.h"
	19	#include "capture.h"
1027f476	20	#include "driver.h"
705ececd MG	21	#include "playback.h"
	22	#include "pod.h"
	23
1027f476 MG	24	#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
1027f476 MG	25
e1a164d7	26	static struct snd_line6_pcm dev2pcm(struct device dev)
1027f476 MG	27	{
	28	struct usb_interface *interface = to_usb_interface(dev);
	29	struct usb_line6 *line6 = usb_get_intfdata(interface);
	30	struct snd_line6_pcm *line6pcm = line6->line6pcm;
	31	return line6pcm;
	32	}
	33
	34	/*
	35	"read" request on "impulse_volume" special file.
	36	*/
	37	static ssize_t pcm_get_impulse_volume(struct device *dev,
e1a164d7	38	struct device_attribute attr, char buf)
1027f476 MG	39	{
	40	return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_volume);
	41	}
	42
	43	/*
	44	"write" request on "impulse_volume" special file.
	45	*/
	46	static ssize_t pcm_set_impulse_volume(struct device *dev,
	47	struct device_attribute *attr,
	48	const char *buf, size_t count)
	49	{
	50	struct snd_line6_pcm *line6pcm = dev2pcm(dev);
cdf5e551 JT	51	int value;
	52	int rv;
	53
	54	rv = kstrtoint(buf, 10, &value);
	55	if (rv < 0)
	56	return rv;
	57
1027f476 MG	58	line6pcm->impulse_volume = value;
1027f476 MG	59
e1a164d7	60	if (value > 0)
0ca54888	61	line6_pcm_acquire(line6pcm, LINE6_BITS_PCM_IMPULSE);
1027f476	62	else
0ca54888	63	line6_pcm_release(line6pcm, LINE6_BITS_PCM_IMPULSE);
1027f476 MG	64
	65	return count;
	66	}
	67
	68	/*
	69	"read" request on "impulse_period" special file.
	70	*/
	71	static ssize_t pcm_get_impulse_period(struct device *dev,
e1a164d7	72	struct device_attribute attr, char buf)
1027f476 MG	73	{
	74	return sprintf(buf, "%d\n", dev2pcm(dev)->impulse_period);
	75	}
	76
	77	/*
	78	"write" request on "impulse_period" special file.
	79	*/
	80	static ssize_t pcm_set_impulse_period(struct device *dev,
	81	struct device_attribute *attr,
	82	const char *buf, size_t count)
	83	{
	84	dev2pcm(dev)->impulse_period = simple_strtoul(buf, NULL, 10);
	85	return count;
	86	}
	87
a3a972a0	88	static DEVICE_ATTR(impulse_volume, S_IWUSR \| S_IRUGO, pcm_get_impulse_volume,
e1a164d7	89	pcm_set_impulse_volume);
a3a972a0	90	static DEVICE_ATTR(impulse_period, S_IWUSR \| S_IRUGO, pcm_get_impulse_period,
e1a164d7	91	pcm_set_impulse_period);
1027f476 MG	92
	93	#endif
	94
6b02a17e MG	95	static bool test_flags(unsigned long flags0, unsigned long flags1,
	96	unsigned long mask)
	97	{
	98	return ((flags0 & mask) == 0) && ((flags1 & mask) != 0);
	99	}
	100
0ca54888	101	int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int channels)
1027f476	102	{
e1a164d7 MG	103	unsigned long flags_old =
e1a164d7 MG	104	__sync_fetch_and_or(&line6pcm->flags, channels);
1027f476	105	unsigned long flags_new = flags_old \| channels;
0ca54888	106	unsigned long flags_final = flags_old;
1027f476	107	int err = 0;
82a74d4a	108
1027f476	109	line6pcm->prev_fbuf = NULL;
e1a164d7	110
0ca54888 MG	111	if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_BUFFER)) {
	112	/* We may be invoked multiple times in a row so allocate once only */
	113	if (!line6pcm->buffer_in) {
	114	line6pcm->buffer_in =
	115	kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
	116	line6pcm->max_packet_size, GFP_KERNEL);
	117
	118	if (!line6pcm->buffer_in) {
	119	dev_err(line6pcm->line6->ifcdev,
	120	"cannot malloc capture buffer\n");
	121	err = -ENOMEM;
	122	goto pcm_acquire_error;
	123	}
	124
	125	flags_final \|= channels & LINE6_BITS_CAPTURE_BUFFER;
	126	}
	127	}
	128
	129	if (test_flags(flags_old, flags_new, LINE6_BITS_CAPTURE_STREAM)) {
1027f476	130	/*
e1a164d7 MG	131	Waiting for completion of active URBs in the stop handler is
	132	a bug, we therefore report an error if capturing is restarted
	133	too soon.
	134	*/
0ca54888 MG	135	if (line6pcm->active_urb_in \| line6pcm->unlink_urb_in) {
0ca54888 MG	136	dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
1027f476	137	return -EBUSY;
6b02a17e MG	138	}
6b02a17e MG	139
1027f476 MG	140	line6pcm->count_in = 0;
	141	line6pcm->prev_fsize = 0;
	142	err = line6_submit_audio_in_all_urbs(line6pcm);
e1a164d7	143
6b02a17e	144	if (err < 0)
0ca54888 MG	145	goto pcm_acquire_error;
	146
	147	flags_final \|= channels & LINE6_BITS_CAPTURE_STREAM;
1027f476	148	}
e1a164d7	149
0ca54888 MG	150	if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_BUFFER)) {
	151	/* We may be invoked multiple times in a row so allocate once only */
	152	if (!line6pcm->buffer_out) {
	153	line6pcm->buffer_out =
	154	kmalloc(LINE6_ISO_BUFFERS * LINE6_ISO_PACKETS *
	155	line6pcm->max_packet_size, GFP_KERNEL);
	156
	157	if (!line6pcm->buffer_out) {
	158	dev_err(line6pcm->line6->ifcdev,
	159	"cannot malloc playback buffer\n");
	160	err = -ENOMEM;
	161	goto pcm_acquire_error;
	162	}
1027f476	163
0ca54888 MG	164	flags_final \|= channels & LINE6_BITS_PLAYBACK_BUFFER;
	165	}
	166	}
6b02a17e	167
0ca54888 MG	168	if (test_flags(flags_old, flags_new, LINE6_BITS_PLAYBACK_STREAM)) {
	169	/*
	170	See comment above regarding PCM restart.
	171	*/
	172	if (line6pcm->active_urb_out \| line6pcm->unlink_urb_out) {
	173	dev_err(line6pcm->line6->ifcdev, "Device not yet ready\n");
	174	return -EBUSY;
6b02a17e MG	175	}
6b02a17e MG	176
1027f476 MG	177	line6pcm->count_out = 0;
1027f476 MG	178	err = line6_submit_audio_out_all_urbs(line6pcm);
e1a164d7	179
6b02a17e	180	if (err < 0)
0ca54888 MG	181	goto pcm_acquire_error;
	182
	183	flags_final \|= channels & LINE6_BITS_PLAYBACK_STREAM;
1027f476	184	}
e1a164d7	185
1027f476	186	return 0;
6b02a17e	187
0ca54888 MG	188	pcm_acquire_error:
	189	/*
	190	If not all requested resources/streams could be obtained, release
	191	those which were successfully obtained (if any).
	192	*/
	193	line6_pcm_release(line6pcm, flags_final & channels);
6b02a17e	194	return err;
1027f476 MG	195	}
1027f476 MG	196
0ca54888	197	int line6_pcm_release(struct snd_line6_pcm *line6pcm, int channels)
1027f476	198	{
e1a164d7 MG	199	unsigned long flags_old =
e1a164d7 MG	200	__sync_fetch_and_and(&line6pcm->flags, ~channels);
1027f476 MG	201	unsigned long flags_new = flags_old & ~channels;
1027f476 MG	202
0ca54888	203	if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_STREAM))
1027f476	204	line6_unlink_audio_in_urbs(line6pcm);
6b02a17e	205
0ca54888 MG	206	if (test_flags(flags_new, flags_old, LINE6_BITS_CAPTURE_BUFFER)) {
	207	line6_wait_clear_audio_in_urbs(line6pcm);
	208	line6_free_capture_buffer(line6pcm);
1027f476 MG	209	}
1027f476 MG	210
0ca54888	211	if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_STREAM))
1027f476	212	line6_unlink_audio_out_urbs(line6pcm);
6b02a17e	213
0ca54888 MG	214	if (test_flags(flags_new, flags_old, LINE6_BITS_PLAYBACK_BUFFER)) {
	215	line6_wait_clear_audio_out_urbs(line6pcm);
	216	line6_free_playback_buffer(line6pcm);
1027f476	217	}
1027f476 MG	218
	219	return 0;
	220	}
	221
705ececd MG	222	/* trigger callback */
	223	int snd_line6_trigger(struct snd_pcm_substream *substream, int cmd)
	224	{
	225	struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
705ececd MG	226	struct snd_pcm_substream *s;
	227	int err;
	228	unsigned long flags;
	229
	230	spin_lock_irqsave(&line6pcm->lock_trigger, flags);
0ca54888	231	clear_bit(LINE6_INDEX_PREPARED, &line6pcm->flags);
705ececd	232
705ececd	233	snd_pcm_group_for_each_entry(s, substream) {
68dc3dde	234	switch (s->stream) {
705ececd	235	case SNDRV_PCM_STREAM_PLAYBACK:
1027f476	236	err = snd_line6_playback_trigger(line6pcm, cmd);
705ececd	237
68dc3dde GKH	238	if (err < 0) {
	239	spin_unlock_irqrestore(&line6pcm->lock_trigger,
	240	flags);
705ececd MG	241	return err;
	242	}
	243
	244	break;
	245
	246	case SNDRV_PCM_STREAM_CAPTURE:
1027f476	247	err = snd_line6_capture_trigger(line6pcm, cmd);
705ececd	248
68dc3dde GKH	249	if (err < 0) {
	250	spin_unlock_irqrestore(&line6pcm->lock_trigger,
	251	flags);
705ececd MG	252	return err;
	253	}
	254
	255	break;
	256
	257	default:
e1a164d7 MG	258	dev_err(line6pcm->line6->ifcdev,
e1a164d7 MG	259	"Unknown stream direction %d\n", s->stream);
705ececd MG	260	}
	261	}
	262
	263	spin_unlock_irqrestore(&line6pcm->lock_trigger, flags);
	264	return 0;
	265	}
	266
	267	/* control info callback */
1027f476 MG	268	static int snd_line6_control_playback_info(struct snd_kcontrol *kcontrol,
1027f476 MG	269	struct snd_ctl_elem_info *uinfo)
68dc3dde	270	{
705ececd MG	271	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	272	uinfo->count = 2;
	273	uinfo->value.integer.min = 0;
	274	uinfo->value.integer.max = 256;
	275	return 0;
	276	}
	277
	278	/* control get callback */
1027f476 MG	279	static int snd_line6_control_playback_get(struct snd_kcontrol *kcontrol,
1027f476 MG	280	struct snd_ctl_elem_value *ucontrol)
68dc3dde	281	{
705ececd MG	282	int i;
	283	struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
	284
68dc3dde	285	for (i = 2; i--;)
1027f476	286	ucontrol->value.integer.value[i] = line6pcm->volume_playback[i];
705ececd MG	287
	288	return 0;
	289	}
	290
	291	/* control put callback */
1027f476 MG	292	static int snd_line6_control_playback_put(struct snd_kcontrol *kcontrol,
1027f476 MG	293	struct snd_ctl_elem_value *ucontrol)
68dc3dde	294	{
705ececd MG	295	int i, changed = 0;
	296	struct snd_line6_pcm *line6pcm = snd_kcontrol_chip(kcontrol);
	297
68dc3dde	298	for (i = 2; i--;)
e1a164d7 MG	299	if (line6pcm->volume_playback[i] !=
	300	ucontrol->value.integer.value[i]) {
	301	line6pcm->volume_playback[i] =
	302	ucontrol->value.integer.value[i];
705ececd MG	303	changed = 1;
	304	}
	305
	306	return changed;
	307	}
	308
	309	/* control definition */
1027f476	310	static struct snd_kcontrol_new line6_control_playback = {
705ececd MG	311	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	312	.name = "PCM Playback Volume",
	313	.index = 0,
	314	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
1027f476 MG	315	.info = snd_line6_control_playback_info,
	316	.get = snd_line6_control_playback_get,
	317	.put = snd_line6_control_playback_put
705ececd MG	318	};
	319
	320	/*
	321	Cleanup the PCM device.
	322	*/
	323	static void line6_cleanup_pcm(struct snd_pcm *pcm)
	324	{
	325	int i;
	326	struct snd_line6_pcm *line6pcm = snd_pcm_chip(pcm);
	327
1027f476 MG	328	#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
	329	device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_volume);
	330	device_remove_file(line6pcm->line6->ifcdev, &dev_attr_impulse_period);
	331	#endif
	332
68dc3dde GKH	333	for (i = LINE6_ISO_BUFFERS; i--;) {
68dc3dde GKH	334	if (line6pcm->urb_audio_out[i]) {
705ececd MG	335	usb_kill_urb(line6pcm->urb_audio_out[i]);
	336	usb_free_urb(line6pcm->urb_audio_out[i]);
	337	}
68dc3dde	338	if (line6pcm->urb_audio_in[i]) {
705ececd MG	339	usb_kill_urb(line6pcm->urb_audio_in[i]);
	340	usb_free_urb(line6pcm->urb_audio_in[i]);
	341	}
	342	}
	343	}
	344
	345	/* create a PCM device */
	346	static int snd_line6_new_pcm(struct snd_line6_pcm *line6pcm)
	347	{
	348	struct snd_pcm *pcm;
	349	int err;
	350
68dc3dde	351	err = snd_pcm_new(line6pcm->line6->card,
e1a164d7 MG	352	(char *)line6pcm->line6->properties->name,
e1a164d7 MG	353	0, 1, 1, &pcm);
68dc3dde	354	if (err < 0)
705ececd MG	355	return err;
	356
	357	pcm->private_data = line6pcm;
	358	pcm->private_free = line6_cleanup_pcm;
	359	line6pcm->pcm = pcm;
	360	strcpy(pcm->name, line6pcm->line6->properties->name);
	361
	362	/* set operators */
afb9091d SB	363	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
afb9091d SB	364	&snd_line6_playback_ops);
e1a164d7	365	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_line6_capture_ops);
705ececd MG	366
705ececd MG	367	/* pre-allocation of buffers */
68dc3dde	368	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
e1a164d7 MG	369	snd_dma_continuous_data
	370	(GFP_KERNEL), 64 * 1024,
	371	128 * 1024);
705ececd MG	372
	373	return 0;
	374	}
	375
	376	/* PCM device destructor */
	377	static int snd_line6_pcm_free(struct snd_device *device)
	378	{
	379	return 0;
	380	}
	381
1027f476 MG	382	/*
	383	Stop substream if still running.
	384	*/
	385	static void pcm_disconnect_substream(struct snd_pcm_substream *substream)
	386	{
027360c5	387	if (substream->runtime && snd_pcm_running(substream))
1027f476	388	snd_pcm_stop(substream, SNDRV_PCM_STATE_DISCONNECTED);
1027f476 MG	389	}
	390
	391	/*
	392	Stop PCM stream.
	393	*/
	394	void line6_pcm_disconnect(struct snd_line6_pcm *line6pcm)
	395	{
e1a164d7 MG	396	pcm_disconnect_substream(get_substream
	397	(line6pcm, SNDRV_PCM_STREAM_CAPTURE));
	398	pcm_disconnect_substream(get_substream
	399	(line6pcm, SNDRV_PCM_STREAM_PLAYBACK));
1027f476 MG	400	line6_unlink_wait_clear_audio_out_urbs(line6pcm);
	401	line6_unlink_wait_clear_audio_in_urbs(line6pcm);
	402	}
	403
705ececd MG	404	/*
	405	Create and register the PCM device and mixer entries.
	406	Create URBs for playback and capture.
	407	*/
68dc3dde GKH	408	int line6_init_pcm(struct usb_line6 *line6,
68dc3dde GKH	409	struct line6_pcm_properties *properties)
705ececd MG	410	{
	411	static struct snd_device_ops pcm_ops = {
	412	.dev_free = snd_line6_pcm_free,
	413	};
	414
	415	int err;
	416	int ep_read = 0, ep_write = 0;
	417	struct snd_line6_pcm *line6pcm;
	418
68dc3dde	419	if (!(line6->properties->capabilities & LINE6_BIT_PCM))
e1a164d7	420	return 0; /* skip PCM initialization and report success */
705ececd MG	421
705ececd MG	422	/* initialize PCM subsystem based on product id: */
68dc3dde	423	switch (line6->product) {
705ececd	424	case LINE6_DEVID_BASSPODXT:
68dc3dde GKH	425	case LINE6_DEVID_BASSPODXTLIVE:
	426	case LINE6_DEVID_BASSPODXTPRO:
	427	case LINE6_DEVID_PODXT:
	428	case LINE6_DEVID_PODXTLIVE:
	429	case LINE6_DEVID_PODXTPRO:
16dc1040	430	case LINE6_DEVID_PODHD300:
e1a164d7	431	ep_read = 0x82;
705ececd MG	432	ep_write = 0x01;
	433	break;
	434
4c6fb5fc	435	case LINE6_DEVID_PODHD500:
68dc3dde GKH	436	case LINE6_DEVID_PODX3:
68dc3dde GKH	437	case LINE6_DEVID_PODX3LIVE:
e1a164d7	438	ep_read = 0x86;
705ececd MG	439	ep_write = 0x02;
	440	break;
	441
68dc3dde	442	case LINE6_DEVID_POCKETPOD:
e1a164d7	443	ep_read = 0x82;
705ececd MG	444	ep_write = 0x02;
	445	break;
	446
68dc3dde	447	case LINE6_DEVID_GUITARPORT:
1027f476 MG	448	case LINE6_DEVID_PODSTUDIO_GX:
	449	case LINE6_DEVID_PODSTUDIO_UX1:
	450	case LINE6_DEVID_PODSTUDIO_UX2:
705ececd	451	case LINE6_DEVID_TONEPORT_GX:
1027f476 MG	452	case LINE6_DEVID_TONEPORT_UX1:
1027f476 MG	453	case LINE6_DEVID_TONEPORT_UX2:
e1a164d7	454	ep_read = 0x82;
705ececd MG	455	ep_write = 0x01;
	456	break;
	457
1027f476	458	/* this is for interface_number == 1:
e1a164d7 MG	459	case LINE6_DEVID_TONEPORT_UX2:
	460	case LINE6_DEVID_PODSTUDIO_UX2:
	461	ep_read = 0x87;
	462	ep_write = 0x00;
	463	break;
	464	*/
705ececd MG	465
	466	default:
	467	MISSING_CASE;
	468	}
	469
	470	line6pcm = kzalloc(sizeof(struct snd_line6_pcm), GFP_KERNEL);
	471
68dc3dde	472	if (line6pcm == NULL)
705ececd MG	473	return -ENOMEM;
705ececd MG	474
1027f476 MG	475	line6pcm->volume_playback[0] = line6pcm->volume_playback[1] = 255;
1027f476 MG	476	line6pcm->volume_monitor = 255;
705ececd MG	477	line6pcm->line6 = line6;
	478	line6pcm->ep_audio_read = ep_read;
	479	line6pcm->ep_audio_write = ep_write;
3b08db37 SH	480
	481	/* Read and write buffers are sized identically, so choose minimum */
	482	line6pcm->max_packet_size = min(
	483	usb_maxpacket(line6->usbdev,
	484	usb_rcvisocpipe(line6->usbdev, ep_read), 0),
	485	usb_maxpacket(line6->usbdev,
	486	usb_sndisocpipe(line6->usbdev, ep_write), 1));
	487
705ececd MG	488	line6pcm->properties = properties;
	489	line6->line6pcm = line6pcm;
	490
	491	/* PCM device: */
68dc3dde GKH	492	err = snd_device_new(line6->card, SNDRV_DEV_PCM, line6, &pcm_ops);
68dc3dde GKH	493	if (err < 0)
705ececd MG	494	return err;
	495
	496	snd_card_set_dev(line6->card, line6->ifcdev);
	497
68dc3dde GKH	498	err = snd_line6_new_pcm(line6pcm);
68dc3dde GKH	499	if (err < 0)
705ececd MG	500	return err;
	501
	502	spin_lock_init(&line6pcm->lock_audio_out);
	503	spin_lock_init(&line6pcm->lock_audio_in);
	504	spin_lock_init(&line6pcm->lock_trigger);
	505
1027f476	506	err = line6_create_audio_out_urbs(line6pcm);
68dc3dde	507	if (err < 0)
705ececd MG	508	return err;
705ececd MG	509
1027f476	510	err = line6_create_audio_in_urbs(line6pcm);
68dc3dde	511	if (err < 0)
705ececd MG	512	return err;
	513
	514	/* mixer: */
e1a164d7 MG	515	err =
	516	snd_ctl_add(line6->card,
	517	snd_ctl_new1(&line6_control_playback, line6pcm));
1027f476 MG	518	if (err < 0)
	519	return err;
	520
	521	#ifdef CONFIG_LINE6_USB_IMPULSE_RESPONSE
	522	/* impulse response test: */
	523	err = device_create_file(line6->ifcdev, &dev_attr_impulse_volume);
68dc3dde	524	if (err < 0)
705ececd MG	525	return err;
705ececd MG	526
1027f476 MG	527	err = device_create_file(line6->ifcdev, &dev_attr_impulse_period);
	528	if (err < 0)
	529	return err;
	530
	531	line6pcm->impulse_period = LINE6_IMPULSE_DEFAULT_PERIOD;
	532	#endif
	533
705ececd MG	534	return 0;
	535	}
	536
	537	/* prepare pcm callback */
	538	int snd_line6_prepare(struct snd_pcm_substream *substream)
	539	{
	540	struct snd_line6_pcm *line6pcm = snd_pcm_substream_chip(substream);
	541
665f3f50 SH	542	switch (substream->stream) {
665f3f50 SH	543	case SNDRV_PCM_STREAM_PLAYBACK:
0ca54888	544	if ((line6pcm->flags & LINE6_BITS_PLAYBACK_STREAM) == 0)
6b02a17e MG	545	line6_unlink_wait_clear_audio_out_urbs(line6pcm);
6b02a17e MG	546
665f3f50 SH	547	break;
	548
	549	case SNDRV_PCM_STREAM_CAPTURE:
0ca54888	550	if ((line6pcm->flags & LINE6_BITS_CAPTURE_STREAM) == 0)
6b02a17e MG	551	line6_unlink_wait_clear_audio_in_urbs(line6pcm);
6b02a17e MG	552
665f3f50 SH	553	break;
	554
	555	default:
	556	MISSING_CASE;
	557	}
	558
0ca54888	559	if (!test_and_set_bit(LINE6_INDEX_PREPARED, &line6pcm->flags)) {
1027f476	560	line6pcm->count_out = 0;
705ececd MG	561	line6pcm->pos_out = 0;
705ececd MG	562	line6pcm->pos_out_done = 0;
705ececd	563	line6pcm->bytes_out = 0;
1027f476	564	line6pcm->count_in = 0;
705ececd MG	565	line6pcm->pos_in_done = 0;
	566	line6pcm->bytes_in = 0;
	567	}
	568
	569	return 0;
	570	}