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ALSA: Add USB US122L driver

Browse source 
Added a new US122L usb-audio driver.  This driver works together with a
dedicated alsa-lib plugin.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Karsten Wiese 2008-07-30 15:13:29 +02:00 committed by Jaroslav Kysela
parent 896e6cc20e
commit 030a07e441
10 changed files with 1648 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
include/sound/asound.h
View file

@ -93,9 +93,10 @@ enum {
SNDRV_HWDEP_IFACE_PCXHR, /* Digigram PCXHR */
SNDRV_HWDEP_IFACE_SB_RC, /* SB Extigy/Audigy2NX remote control */
SNDRV_HWDEP_IFACE_HDA, /* HD-audio */
SNDRV_HWDEP_IFACE_USB_STREAM, /* direct access to usb stream */
/* Don't forget to change the following: */
SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_HDA
SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_USB_STREAM
};
struct snd_hwdep_info {

11
sound/usb/Kconfig
View file

@ -67,5 +67,16 @@ config SND_USB_CAIAQ_INPUT
* Native Instruments Kore Controller 2
* Native Instruments Audio Kontrol 1
config SND_USB_US122L
tristate "Tascam US-122L USB driver"
depends on X86 && EXPERIMENTAL
select SND_RAWMIDI
help
Say Y here to include support for Tascam US-122L USB Audio/MIDI
interfaces.
To compile this driver as a module, choose M here: the module
will be called snd-usb-us122l.
endif # SND_USB

1
sound/usb/Makefile
View file

@ -8,5 +8,6 @@ snd-usb-lib-objs := usbmidi.o
# Toplevel Module Dependency
obj-$(CONFIG_SND_USB_AUDIO) += snd-usb-audio.o snd-usb-lib.o
obj-$(CONFIG_SND_USB_USX2Y) += snd-usb-lib.o
obj-$(CONFIG_SND_USB_US122L) += snd-usb-lib.o
obj-$(CONFIG_SND) += usx2y/ caiaq/

1
sound/usb/usbaudio.h
View file

@ -156,6 +156,7 @@ enum quirk_type {
QUIRK_MIDI_RAW,
QUIRK_MIDI_EMAGIC,
QUIRK_MIDI_CME,
QUIRK_MIDI_US122L,
QUIRK_AUDIO_STANDARD_INTERFACE,
QUIRK_AUDIO_FIXED_ENDPOINT,
QUIRK_AUDIO_EDIROL_UA700_UA25,

39
sound/usb/usbmidi.c
View file

@ -669,6 +669,42 @@ static struct usb_protocol_ops snd_usbmidi_raw_ops = {
.output = snd_usbmidi_raw_output,
};
static void snd_usbmidi_us122l_input(struct snd_usb_midi_in_endpoint *ep,
uint8_t *buffer, int buffer_length)
{
if (buffer_length != 9)
return;
buffer_length = 8;
while (buffer_length && buffer[buffer_length - 1] == 0xFD)
buffer_length--;
if (buffer_length)
snd_usbmidi_input_data(ep, 0, buffer, buffer_length);
}
static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep)
{
int count;
if (!ep->ports[0].active)
return;
count = ep->urb->dev->speed == USB_SPEED_HIGH ? 1 : 2;
count = snd_rawmidi_transmit(ep->ports[0].substream,
ep->urb->transfer_buffer,
count);
if (count < 1) {
ep->ports[0].active = 0;
return;
}
memset(ep->urb->transfer_buffer + count, 0xFD, 9 - count);
ep->urb->transfer_buffer_length = count;
}
static struct usb_protocol_ops snd_usbmidi_122l_ops = {
.input = snd_usbmidi_us122l_input,
.output = snd_usbmidi_us122l_output,
};
/*
* Emagic USB MIDI protocol: raw MIDI with "F5 xx" port switching.
*/
@ -1714,6 +1750,9 @@ int snd_usb_create_midi_interface(struct snd_usb_audio* chip,
umidi->usb_protocol_ops =
&snd_usbmidi_maudio_broken_running_status_ops;
break;
case QUIRK_MIDI_US122L:
umidi->usb_protocol_ops = &snd_usbmidi_122l_ops;
/* fall through */
case QUIRK_MIDI_FIXED_ENDPOINT:
memcpy(&endpoints[0], quirk->data,
sizeof(struct snd_usb_midi_endpoint_info));

2
sound/usb/usx2y/Makefile
View file

@ -1,3 +1,5 @@
snd-usb-usx2y-objs := usbusx2y.o usX2Yhwdep.o usx2yhwdeppcm.o
snd-usb-us122l-objs := us122l.o
obj-$(CONFIG_SND_USB_USX2Y) += snd-usb-usx2y.o
obj-$(CONFIG_SND_USB_US122L) += snd-usb-us122l.o

692
sound/usb/usx2y/us122l.c Normal file
View file

@ -0,0 +1,692 @@
/*
* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <sound/core.h>
#include <sound/hwdep.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#define MODNAME "US122L"
#include "usb_stream.c"
#include "../usbaudio.h"
#include "us122l.h"
MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
MODULE_LICENSE("GPL");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
/* Enable this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
static int snd_us122l_card_used[SNDRV_CARDS];
static int us122l_create_usbmidi(struct snd_card *card)
{
static struct snd_usb_midi_endpoint_info quirk_data = {
.out_ep = 4,
.in_ep = 3,
.out_cables = 0x001,
.in_cables = 0x001
};
static struct snd_usb_audio_quirk quirk = {
.vendor_name = "US122L",
.product_name = NAME_ALLCAPS,
.ifnum = 1,
.type = QUIRK_MIDI_US122L,
.data = &quirk_data
};
struct usb_device *dev = US122L(card)->chip.dev;
struct usb_interface *iface = usb_ifnum_to_if(dev, 1);
return snd_usb_create_midi_interface(&US122L(card)->chip,
iface, &quirk);
}
/*
* Wrapper for usb_control_msg().
* Allocates a temp buffer to prevent dmaing from/to the stack.
*/
static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
__u8 request, __u8 requesttype,
__u16 value, __u16 index, void *data,
__u16 size, int timeout)
{
int err;
void *buf = NULL;
if (size > 0) {
buf = kmemdup(data, size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
}
err = usb_control_msg(dev, pipe, request, requesttype,
value, index, buf, size, timeout);
if (size > 0) {
memcpy(data, buf, size);
kfree(buf);
}
return err;
}
static void pt_info_set(struct usb_device *dev, u8 v)
{
int ret;
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
'I',
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
v, 0, NULL, 0, 1000);
snd_printdd(KERN_DEBUG "%i\n", ret);
}
static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
{
struct us122l *us122l = area->vm_private_data;
atomic_inc(&us122l->mmap_count);
snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
}
static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
struct vm_fault *vmf)
{
unsigned long offset;
struct page *page;
void *vaddr;
struct us122l *us122l = area->vm_private_data;
struct usb_stream *s;
int vm_f = VM_FAULT_SIGBUS;
mutex_lock(&us122l->mutex);
s = us122l->sk.s;
if (!s)
goto out;
offset = vmf->pgoff << PAGE_SHIFT;
if (offset < PAGE_ALIGN(s->read_size))
vaddr = (char *)s + offset;
else {
offset -= PAGE_ALIGN(s->read_size);
if (offset >= PAGE_ALIGN(s->write_size))
goto out;
vaddr = us122l->sk.write_page + offset;
}
page = virt_to_page(vaddr);
get_page(page);
mutex_unlock(&us122l->mutex);
vmf->page = page;
vm_f = 0;
out:
return vm_f;
}
static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
{
struct us122l *us122l = area->vm_private_data;
atomic_dec(&us122l->mmap_count);
snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
}
static struct vm_operations_struct usb_stream_hwdep_vm_ops = {
.open = usb_stream_hwdep_vm_open,
.fault = usb_stream_hwdep_vm_fault,
.close = usb_stream_hwdep_vm_close,
};
static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
struct us122l *us122l = hw->private_data;
struct usb_interface *iface;
snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
if (hw->used >= 2)
return -EBUSY;
if (!us122l->first)
us122l->first = file;
iface = usb_ifnum_to_if(us122l->chip.dev, 1);
usb_autopm_get_interface(iface);
return 0;
}
static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
struct us122l *us122l = hw->private_data;
struct usb_interface *iface = usb_ifnum_to_if(us122l->chip.dev, 1);
snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
usb_autopm_put_interface(iface);
if (us122l->first == file)
us122l->first = NULL;
mutex_lock(&us122l->mutex);
if (us122l->master == file)
us122l->master = us122l->slave;
us122l->slave = NULL;
mutex_unlock(&us122l->mutex);
return 0;
}
static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
struct file *filp, struct vm_area_struct *area)
{
unsigned long size = area->vm_end - area->vm_start;
struct us122l *us122l = hw->private_data;
unsigned long offset;
struct usb_stream *s;
int err = 0;
bool read;
offset = area->vm_pgoff << PAGE_SHIFT;
mutex_lock(&us122l->mutex);
s = us122l->sk.s;
read = offset < s->read_size;
if (read && area->vm_flags & VM_WRITE) {
err = -EPERM;
goto out;
}
snd_printdd(KERN_DEBUG "%lu %u\n", size,
read ? s->read_size : s->write_size);
/* if userspace tries to mmap beyond end of our buffer, fail */
if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
snd_printk(KERN_WARNING "%lu > %u\n", size,
read ? s->read_size : s->write_size);
err = -EINVAL;
goto out;
}
area->vm_ops = &usb_stream_hwdep_vm_ops;
area->vm_flags |= VM_RESERVED;
area->vm_private_data = us122l;
atomic_inc(&us122l->mmap_count);
out:
mutex_unlock(&us122l->mutex);
return err;
}
static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
struct file *file, poll_table *wait)
{
struct us122l *us122l = hw->private_data;
struct usb_stream *s = us122l->sk.s;
unsigned *polled;
unsigned int mask;
poll_wait(file, &us122l->sk.sleep, wait);
switch (s->state) {
case usb_stream_ready:
if (us122l->first == file)
polled = &s->periods_polled;
else
polled = &us122l->second_periods_polled;
if (*polled != s->periods_done) {
*polled = s->periods_done;
mask = POLLIN | POLLOUT | POLLWRNORM;
break;
}
/* Fall through */
mask = 0;
break;
default:
mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
break;
}
return mask;
}
static void us122l_stop(struct us122l *us122l)
{
struct list_head *p;
list_for_each(p, &us122l->chip.midi_list)
snd_usbmidi_input_stop(p);
usb_stream_stop(&us122l->sk);
usb_stream_free(&us122l->sk);
}
static int us122l_set_sample_rate(struct usb_device *dev, int rate)
{
unsigned int ep = 0x81;
unsigned char data[3];
int err;
data[0] = rate;
data[1] = rate >> 8;
data[2] = rate >> 16;
err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000);
if (err < 0)
snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
dev->devnum, rate, ep);
return err;
}
static bool us122l_start(struct us122l *us122l,
unsigned rate, unsigned period_frames)
{
struct list_head *p;
int err;
unsigned use_packsize = 0;
bool success = false;
if (us122l->chip.dev->speed == USB_SPEED_HIGH) {
/* The us-122l's descriptor defaults to iso max_packsize 78,
which isn't needed for samplerates <= 48000.
Lets save some memory:
*/
switch (rate) {
case 44100:
use_packsize = 36;
break;
case 48000:
use_packsize = 42;
break;
case 88200:
use_packsize = 72;
break;
}
}
if (!usb_stream_new(&us122l->sk, us122l->chip.dev, 1, 2,
rate, use_packsize, period_frames, 6))
goto out;
err = us122l_set_sample_rate(us122l->chip.dev, rate);
if (err < 0) {
us122l_stop(us122l);
snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
goto out;
}
err = usb_stream_start(&us122l->sk);
if (err < 0) {
us122l_stop(us122l);
snd_printk(KERN_ERR "us122l_start error %i \n", err);
goto out;
}
list_for_each(p, &us122l->chip.midi_list)
snd_usbmidi_input_start(p);
success = true;
out:
return success;
}
static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
unsigned cmd, unsigned long arg)
{
struct usb_stream_config *cfg;
struct us122l *us122l = hw->private_data;
unsigned min_period_frames;
int err = 0;
bool high_speed;
if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
return -ENOTTY;
cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg)
return -ENOMEM;
if (copy_from_user(cfg, (void *)arg, sizeof(*cfg))) {
err = -EFAULT;
goto free;
}
if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
err = -ENXIO;
goto free;
}
high_speed = us122l->chip.dev->speed == USB_SPEED_HIGH;
if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000 &&
(!high_speed ||
(cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
cfg->frame_size != 6 ||
cfg->period_frames > 0x3000) {
err = -EINVAL;
goto free;
}
switch (cfg->sample_rate) {
case 44100:
min_period_frames = 48;
break;
case 48000:
min_period_frames = 52;
break;
default:
min_period_frames = 104;
break;
}
if (!high_speed)
min_period_frames <<= 1;
if (cfg->period_frames < min_period_frames) {
err = -EINVAL;
goto free;
}
snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);
mutex_lock(&us122l->mutex);
if (!us122l->master)
us122l->master = file;
else if (us122l->master != file) {
if (memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg))) {
err = -EIO;
goto unlock;
}
us122l->slave = file;
}
if (!us122l->sk.s ||
memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg)) ||
us122l->sk.s->state == usb_stream_xrun) {
us122l_stop(us122l);
if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
err = -EIO;
else
err = 1;
}
unlock:
mutex_unlock(&us122l->mutex);
free:
kfree(cfg);
return err;
}
#define SND_USB_STREAM_ID "USB STREAM"
static int usb_stream_hwdep_new(struct snd_card *card)
{
int err;
struct snd_hwdep *hw;
struct usb_device *dev = US122L(card)->chip.dev;
err = snd_hwdep_new(card, SND_USB_STREAM_ID, 0, &hw);
if (err < 0)
return err;
hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
hw->private_data = US122L(card);
hw->ops.open = usb_stream_hwdep_open;
hw->ops.release = usb_stream_hwdep_release;
hw->ops.ioctl = usb_stream_hwdep_ioctl;
hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
hw->ops.mmap = usb_stream_hwdep_mmap;
hw->ops.poll = usb_stream_hwdep_poll;
sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
dev->bus->busnum, dev->devnum);
return 0;
}
static bool us122l_create_card(struct snd_card *card)
{
int err;
struct us122l *us122l = US122L(card);
err = usb_set_interface(us122l->chip.dev, 1, 1);
if (err) {
snd_printk(KERN_ERR "usb_set_interface error \n");
return false;
}
pt_info_set(us122l->chip.dev, 0x11);
pt_info_set(us122l->chip.dev, 0x10);
if (!us122l_start(us122l, 44100, 256))
return false;
err = us122l_create_usbmidi(card);
if (err < 0) {
snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
us122l_stop(us122l);
return false;
}
err = usb_stream_hwdep_new(card);
if (err < 0) {
/* release the midi resources */
struct list_head *p;
list_for_each(p, &us122l->chip.midi_list)
snd_usbmidi_disconnect(p);
us122l_stop(us122l);
return false;
}
return true;
}
static struct snd_card *usx2y_create_card(struct usb_device *device)
{
int dev;
struct snd_card *card;
for (dev = 0; dev < SNDRV_CARDS; ++dev)
if (enable[dev] && !snd_us122l_card_used[dev])
break;
if (dev >= SNDRV_CARDS)
return NULL;
card = snd_card_new(index[dev], id[dev], THIS_MODULE,
sizeof(struct us122l));
if (!card)
return NULL;
snd_us122l_card_used[US122L(card)->chip.index = dev] = 1;
US122L(card)->chip.dev = device;
US122L(card)->chip.card = card;
mutex_init(&US122L(card)->mutex);
init_waitqueue_head(&US122L(card)->sk.sleep);
INIT_LIST_HEAD(&US122L(card)->chip.midi_list);
strcpy(card->driver, "USB "NAME_ALLCAPS"");
sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
card->shortname,
le16_to_cpu(device->descriptor.idVendor),
le16_to_cpu(device->descriptor.idProduct),
0,
US122L(card)->chip.dev->bus->busnum,
US122L(card)->chip.dev->devnum
);
snd_card_set_dev(card, &device->dev);
return card;
}
static void *us122l_usb_probe(struct usb_interface *intf,
const struct usb_device_id *device_id)
{
struct usb_device *device = interface_to_usbdev(intf);
struct snd_card *card = usx2y_create_card(device);
if (!card)
return NULL;
if (!us122l_create_card(card) ||
snd_card_register(card) < 0) {
snd_card_free(card);
return NULL;
}
usb_get_dev(device);
return card;
}
static int snd_us122l_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct snd_card *card;
snd_printdd(KERN_DEBUG"%p:%i\n",
intf, intf->cur_altsetting->desc.bInterfaceNumber);
if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
return 0;
card = us122l_usb_probe(usb_get_intf(intf), id);
if (card) {
usb_set_intfdata(intf, card);
return 0;
}
usb_put_intf(intf);
return -EIO;
}
static void snd_us122l_disconnect(struct usb_interface *intf)
{
struct snd_card *card;
struct us122l *us122l;
struct list_head *p;
card = usb_get_intfdata(intf);
if (!card)
return;
snd_card_disconnect(card);
us122l = US122L(card);
mutex_lock(&us122l->mutex);
us122l_stop(us122l);
mutex_unlock(&us122l->mutex);
us122l->chip.shutdown = 1;
/* release the midi resources */
list_for_each(p, &us122l->chip.midi_list) {
snd_usbmidi_disconnect(p);
}
usb_put_intf(intf);
usb_put_dev(US122L(card)->chip.dev);
while (atomic_read(&us122l->mmap_count))
msleep(500);
snd_card_free(card);
}
static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
{
struct snd_card *card;
struct us122l *us122l;
struct list_head *p;
card = dev_get_drvdata(&intf->dev);
if (!card)
return 0;
snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
us122l = US122L(card);
if (!us122l)
return 0;
list_for_each(p, &us122l->chip.midi_list)
snd_usbmidi_input_stop(p);
mutex_lock(&us122l->mutex);
usb_stream_stop(&us122l->sk);
mutex_unlock(&us122l->mutex);
return 0;
}
static int snd_us122l_resume(struct usb_interface *intf)
{
struct snd_card *card;
struct us122l *us122l;
struct list_head *p;
int err;
card = dev_get_drvdata(&intf->dev);
if (!card)
return 0;
us122l = US122L(card);
if (!us122l)
return 0;
mutex_lock(&us122l->mutex);
/* needed, doesn't restart without: */
err = usb_set_interface(us122l->chip.dev, 1, 1);
if (err) {
snd_printk(KERN_ERR "usb_set_interface error \n");
goto unlock;
}
pt_info_set(us122l->chip.dev, 0x11);
pt_info_set(us122l->chip.dev, 0x10);
err = us122l_set_sample_rate(us122l->chip.dev,
us122l->sk.s->cfg.sample_rate);
if (err < 0) {
snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
goto unlock;
}
err = usb_stream_start(&us122l->sk);
if (err)
goto unlock;
list_for_each(p, &us122l->chip.midi_list)
snd_usbmidi_input_start(p);
unlock:
mutex_unlock(&us122l->mutex);
snd_power_change_state(card, SNDRV_CTL_POWER_D0);
return err;
}
static struct usb_device_id snd_us122l_usb_id_table[] = {
{
.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
.idVendor = 0x0644,
.idProduct = USB_ID_US122L
},
/* { */ /* US-144 maybe works when @USB1.1. Untested. */
/* .match_flags = USB_DEVICE_ID_MATCH_DEVICE, */
/* .idVendor = 0x0644, */
/* .idProduct = USB_ID_US144 */
/* }, */
{ /* terminator */ }
};
MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
static struct usb_driver snd_us122l_usb_driver = {
.name = "snd-usb-us122l",
.probe = snd_us122l_probe,
.disconnect = snd_us122l_disconnect,
.suspend = snd_us122l_suspend,
.resume = snd_us122l_resume,
.reset_resume = snd_us122l_resume,
.id_table = snd_us122l_usb_id_table,
.supports_autosuspend = 1
};
static int __init snd_us122l_module_init(void)
{
return usb_register(&snd_us122l_usb_driver);
}
static void __exit snd_us122l_module_exit(void)
{
usb_deregister(&snd_us122l_usb_driver);
}
module_init(snd_us122l_module_init)
module_exit(snd_us122l_module_exit)

27
sound/usb/usx2y/us122l.h Normal file
View file

@ -0,0 +1,27 @@
#ifndef US122L_H
#define US122L_H
struct us122l {
struct snd_usb_audio chip;
int stride;
struct usb_stream_kernel sk;
struct mutex mutex;
struct file *first;
unsigned second_periods_polled;
struct file *master;
struct file *slave;
atomic_t mmap_count;
};
#define US122L(c) ((struct us122l *)(c)->private_data)
#define NAME_ALLCAPS "US-122L"
#define USB_ID_US122L 0x800E
#define USB_ID_US144 0x800F
#endif

761
sound/usb/usx2y/usb_stream.c Normal file
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@ -0,0 +1,761 @@
/*
* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/usb.h>
#include "usb_stream.h"
/* setup */
static unsigned usb_stream_next_packet_size(struct usb_stream_kernel *sk)
{
struct usb_stream *s = sk->s;
sk->out_phase_peeked = (sk->out_phase & 0xffff) + sk->freqn;
return (sk->out_phase_peeked >> 16) * s->cfg.frame_size;
}
static void playback_prep_freqn(struct usb_stream_kernel *sk, struct urb *urb)
{
struct usb_stream *s = sk->s;
unsigned l = 0;
int pack;
urb->iso_frame_desc[0].offset = 0;
urb->iso_frame_desc[0].length = usb_stream_next_packet_size(sk);
sk->out_phase = sk->out_phase_peeked;
urb->transfer_buffer_length = urb->iso_frame_desc[0].length;
for (pack = 1; pack < sk->n_o_ps; pack++) {
l = usb_stream_next_packet_size(sk);
if (s->idle_outsize + urb->transfer_buffer_length + l >
s->period_size)
goto check;
sk->out_phase = sk->out_phase_peeked;
urb->iso_frame_desc[pack].offset = urb->transfer_buffer_length;
urb->iso_frame_desc[pack].length = l;
urb->transfer_buffer_length += l;
}
snd_printdd(KERN_DEBUG "%i\n", urb->transfer_buffer_length);
check:
urb->number_of_packets = pack;
s->idle_outsize += urb->transfer_buffer_length - s->period_size;
snd_printdd(KERN_DEBUG "idle=%i ul=%i ps=%i\n", s->idle_outsize,
urb->transfer_buffer_length, s->period_size);
}
static void init_pipe_urbs(struct usb_stream_kernel *sk, unsigned use_packsize,
struct urb **urbs, char *transfer,
struct usb_device *dev, int pipe)
{
int u, p;
int maxpacket = use_packsize ?
use_packsize : usb_maxpacket(dev, pipe, usb_pipeout(pipe));
int transfer_length = maxpacket * sk->n_o_ps;
for (u = 0; u < USB_STREAM_NURBS;
++u, transfer += transfer_length) {
struct urb *urb = urbs[u];
struct usb_iso_packet_descriptor *desc;
urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = transfer;
urb->dev = dev;
urb->pipe = pipe;
urb->number_of_packets = sk->n_o_ps;
urb->context = sk;
urb->interval = 1;
if (usb_pipeout(pipe))
continue;
urb->transfer_buffer_length = transfer_length;
desc = urb->iso_frame_desc;
desc->offset = 0;
desc->length = maxpacket;
for (p = 1; p < sk->n_o_ps; ++p) {
desc[p].offset = desc[p - 1].offset + maxpacket;
desc[p].length = maxpacket;
}
}
}
static void init_urbs(struct usb_stream_kernel *sk, unsigned use_packsize,
struct usb_device *dev, int in_pipe, int out_pipe)
{
struct usb_stream *s = sk->s;
char *indata = (char *)s + sizeof(*s) +
sizeof(struct usb_stream_packet) *
s->inpackets;
int u;
for (u = 0; u < USB_STREAM_NURBS; ++u) {
sk->inurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL);
sk->outurb[u] = usb_alloc_urb(sk->n_o_ps, GFP_KERNEL);
}
init_pipe_urbs(sk, use_packsize, sk->inurb, indata, dev, in_pipe);
init_pipe_urbs(sk, use_packsize, sk->outurb, sk->write_page, dev,
out_pipe);
}
/*
* convert a sampling rate into our full speed format (fs/1000 in Q16.16)
* this will overflow at approx 524 kHz
*/
static inline unsigned get_usb_full_speed_rate(unsigned rate)
{
return ((rate << 13) + 62) / 125;
}
/*
* convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
* this will overflow at approx 4 MHz
*/
static inline unsigned get_usb_high_speed_rate(unsigned rate)
{
return ((rate << 10) + 62) / 125;
}
void usb_stream_free(struct usb_stream_kernel *sk)
{
struct usb_stream *s;
unsigned u;
for (u = 0; u < USB_STREAM_NURBS; ++u) {
usb_free_urb(sk->inurb[u]);
sk->inurb[u] = NULL;
usb_free_urb(sk->outurb[u]);
sk->outurb[u] = NULL;
}
s = sk->s;
if (!s)
return;
free_pages((unsigned long)sk->write_page, get_order(s->write_size));
sk->write_page = NULL;
free_pages((unsigned long)s, get_order(s->read_size));
sk->s = NULL;
}
struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
struct usb_device *dev,
unsigned in_endpoint, unsigned out_endpoint,
unsigned sample_rate, unsigned use_packsize,
unsigned period_frames, unsigned frame_size)
{
int packets, max_packsize;
int in_pipe, out_pipe;
int read_size = sizeof(struct usb_stream);
int write_size;
int usb_frames = dev->speed == USB_SPEED_HIGH ? 8000 : 1000;
int pg;
in_pipe = usb_rcvisocpipe(dev, in_endpoint);
out_pipe = usb_sndisocpipe(dev, out_endpoint);
max_packsize = use_packsize ?
use_packsize : usb_maxpacket(dev, in_pipe, 0);
/*
t_period = period_frames / sample_rate
iso_packs = t_period / t_iso_frame
= (period_frames / sample_rate) * (1 / t_iso_frame)
*/
packets = period_frames * usb_frames / sample_rate + 1;
if (dev->speed == USB_SPEED_HIGH)
packets = (packets + 7) & ~7;
read_size += packets * USB_STREAM_URBDEPTH *
(max_packsize + sizeof(struct usb_stream_packet));
max_packsize = usb_maxpacket(dev, out_pipe, 1);
write_size = max_packsize * packets * USB_STREAM_URBDEPTH;
if (read_size >= 256*PAGE_SIZE || write_size >= 256*PAGE_SIZE) {
snd_printk(KERN_WARNING "a size exceeds 128*PAGE_SIZE\n");
goto out;
}
pg = get_order(read_size);
sk->s = (void *) __get_free_pages(GFP_KERNEL|__GFP_COMP|__GFP_ZERO, pg);
if (!sk->s) {
snd_printk(KERN_WARNING "couldn't __get_free_pages()\n");
goto out;
}
sk->s->cfg.version = USB_STREAM_INTERFACE_VERSION;
sk->s->read_size = read_size;
sk->s->cfg.sample_rate = sample_rate;
sk->s->cfg.frame_size = frame_size;
sk->n_o_ps = packets;
sk->s->inpackets = packets * USB_STREAM_URBDEPTH;
sk->s->cfg.period_frames = period_frames;
sk->s->period_size = frame_size * period_frames;
sk->s->write_size = write_size;
pg = get_order(write_size);
sk->write_page =
(void *)__get_free_pages(GFP_KERNEL|__GFP_COMP|__GFP_ZERO, pg);
if (!sk->write_page) {
snd_printk(KERN_WARNING "couldn't __get_free_pages()\n");
usb_stream_free(sk);
return NULL;
}
/* calculate the frequency in 16.16 format */
if (dev->speed == USB_SPEED_FULL)
sk->freqn = get_usb_full_speed_rate(sample_rate);
else
sk->freqn = get_usb_high_speed_rate(sample_rate);
init_urbs(sk, use_packsize, dev, in_pipe, out_pipe);
sk->s->state = usb_stream_stopped;
out:
return sk->s;
}
/* start */
static bool balance_check(struct usb_stream_kernel *sk, struct urb *urb)
{
bool r;
if (unlikely(urb->status)) {
if (urb->status != -ESHUTDOWN && urb->status != -ENOENT)
snd_printk(KERN_WARNING "status=%i\n", urb->status);
sk->iso_frame_balance = 0x7FFFFFFF;
return false;
}
r = sk->iso_frame_balance == 0;
if (!r)
sk->i_urb = urb;
return r;
}
static bool balance_playback(struct usb_stream_kernel *sk, struct urb *urb)
{
sk->iso_frame_balance += urb->number_of_packets;
return balance_check(sk, urb);
}
static bool balance_capture(struct usb_stream_kernel *sk, struct urb *urb)
{
sk->iso_frame_balance -= urb->number_of_packets;
return balance_check(sk, urb);
}
static void subs_set_complete(struct urb **urbs, void (*complete)(struct urb *))
{
int u;
for (u = 0; u < USB_STREAM_NURBS; u++) {
struct urb *urb = urbs[u];
urb->complete = complete;
}
}
int usb_stream_prepare_playback(struct usb_stream_kernel *sk, struct urb *inurb)
{
struct usb_stream *s = sk->s;
struct urb *io;
struct usb_iso_packet_descriptor *id, *od;
int p, l = 0;
io = sk->idle_outurb;
od = io->iso_frame_desc;
io->transfer_buffer_length = 0;
for (p = 0; s->sync_packet < 0; ++p, ++s->sync_packet) {
struct urb *ii = sk->completed_inurb;
id = ii->iso_frame_desc +
ii->number_of_packets + s->sync_packet;
l = id->actual_length;
od[p].length = l;
od[p].offset = io->transfer_buffer_length;
io->transfer_buffer_length += l;
}
for (;
s->sync_packet < inurb->number_of_packets && p < sk->n_o_ps;
++p, ++s->sync_packet) {
l = inurb->iso_frame_desc[s->sync_packet].actual_length;
if (s->idle_outsize + io->transfer_buffer_length + l >
s->period_size)
goto check_ok;
od[p].length = l;
od[p].offset = io->transfer_buffer_length;
io->transfer_buffer_length += l;
}
check_ok:
s->sync_packet -= inurb->number_of_packets;
if (s->sync_packet < -2 || s->sync_packet > 0) {
snd_printk(KERN_WARNING "invalid sync_packet = %i;"
" p=%i nop=%i %i %x %x %x > %x\n",
s->sync_packet, p, inurb->number_of_packets,
s->idle_outsize + io->transfer_buffer_length + l,
s->idle_outsize, io->transfer_buffer_length, l,
s->period_size);
return -1;
}
if (io->transfer_buffer_length % s->cfg.frame_size) {
snd_printk(KERN_WARNING"invalid outsize = %i\n",
io->transfer_buffer_length);
return -1;
}
s->idle_outsize += io->transfer_buffer_length - s->period_size;
io->number_of_packets = p;
if (s->idle_outsize > 0) {
snd_printk(KERN_WARNING "idle=%i\n", s->idle_outsize);
return -1;
}
return 0;
}
static void prepare_inurb(int number_of_packets, struct urb *iu)
{
struct usb_iso_packet_descriptor *id;
int p;
iu->number_of_packets = number_of_packets;
id = iu->iso_frame_desc;
id->offset = 0;
for (p = 0; p < iu->number_of_packets - 1; ++p)
id[p + 1].offset = id[p].offset + id[p].length;
iu->transfer_buffer_length =
id[0].length * iu->number_of_packets;
}
static int submit_urbs(struct usb_stream_kernel *sk,
struct urb *inurb, struct urb *outurb)
{
int err;
prepare_inurb(sk->idle_outurb->number_of_packets, sk->idle_inurb);
err = usb_submit_urb(sk->idle_inurb, GFP_ATOMIC);
if (err < 0) {
snd_printk(KERN_ERR "%i\n", err);
return err;
}
sk->idle_inurb = sk->completed_inurb;
sk->completed_inurb = inurb;
err = usb_submit_urb(sk->idle_outurb, GFP_ATOMIC);
if (err < 0) {
snd_printk(KERN_ERR "%i\n", err);
return err;
}
sk->idle_outurb = sk->completed_outurb;
sk->completed_outurb = outurb;
return 0;
}
#ifdef DEBUG_LOOP_BACK
/*
This loop_back() shows how to read/write the period data.
*/
static void loop_back(struct usb_stream *s)
{
char *i, *o;
int il, ol, l, p;
struct urb *iu;
struct usb_iso_packet_descriptor *id;
o = s->playback1st_to;
ol = s->playback1st_size;
l = 0;
if (s->insplit_pack >= 0) {
iu = sk->idle_inurb;
id = iu->iso_frame_desc;
p = s->insplit_pack;
} else
goto second;
loop:
for (; p < iu->number_of_packets && l < s->period_size; ++p) {
i = iu->transfer_buffer + id[p].offset;
il = id[p].actual_length;
if (l + il > s->period_size)
il = s->period_size - l;
if (il <= ol) {
memcpy(o, i, il);
o += il;
ol -= il;
} else {
memcpy(o, i, ol);
singen_6pack(o, ol);
o = s->playback_to;
memcpy(o, i + ol, il - ol);
o += il - ol;
ol = s->period_size - s->playback1st_size;
}
l += il;
}
if (iu == sk->completed_inurb) {
if (l != s->period_size)
printk(KERN_DEBUG"%s:%i %i\n", __func__, __LINE__,
l/(int)s->cfg.frame_size);
return;
}
second:
iu = sk->completed_inurb;
id = iu->iso_frame_desc;
p = 0;
goto loop;
}
#else
static void loop_back(struct usb_stream *s)
{
}
#endif
static void stream_idle(struct usb_stream_kernel *sk,
struct urb *inurb, struct urb *outurb)
{
struct usb_stream *s = sk->s;
int l, p;
int insize = s->idle_insize;
int urb_size = 0;
s->inpacket_split = s->next_inpacket_split;
s->inpacket_split_at = s->next_inpacket_split_at;
s->next_inpacket_split = -1;
s->next_inpacket_split_at = 0;
for (p = 0; p < inurb->number_of_packets; ++p) {
struct usb_iso_packet_descriptor *id = inurb->iso_frame_desc;
l = id[p].actual_length;
if (unlikely(l == 0 || id[p].status)) {
snd_printk(KERN_WARNING "underrun, status=%u\n",
id[p].status);
goto err_out;
}
s->inpacket_head++;
s->inpacket_head %= s->inpackets;
if (s->inpacket_split == -1)
s->inpacket_split = s->inpacket_head;
s->inpacket[s->inpacket_head].offset =
id[p].offset + (inurb->transfer_buffer - (void *)s);
s->inpacket[s->inpacket_head].length = l;
if (insize + l > s->period_size &&
s->next_inpacket_split == -1) {
s->next_inpacket_split = s->inpacket_head;
s->next_inpacket_split_at = s->period_size - insize;
}
insize += l;
urb_size += l;
}
s->idle_insize += urb_size - s->period_size;
if (s->idle_insize < 0) {
snd_printk(KERN_WARNING "%i\n",
(s->idle_insize)/(int)s->cfg.frame_size);
goto err_out;
}
s->insize_done += urb_size;
l = s->idle_outsize;
s->outpacket[0].offset = (sk->idle_outurb->transfer_buffer -
sk->write_page) - l;
if (usb_stream_prepare_playback(sk, inurb) < 0)
goto err_out;
s->outpacket[0].length = sk->idle_outurb->transfer_buffer_length + l;
s->outpacket[1].offset = sk->completed_outurb->transfer_buffer -
sk->write_page;
if (submit_urbs(sk, inurb, outurb) < 0)
goto err_out;
loop_back(s);
s->periods_done++;
wake_up_all(&sk->sleep);
return;
err_out:
s->state = usb_stream_xrun;
wake_up_all(&sk->sleep);
}
static void i_capture_idle(struct urb *urb)
{
struct usb_stream_kernel *sk = urb->context;
if (balance_capture(sk, urb))
stream_idle(sk, urb, sk->i_urb);
}
static void i_playback_idle(struct urb *urb)
{
struct usb_stream_kernel *sk = urb->context;
if (balance_playback(sk, urb))
stream_idle(sk, sk->i_urb, urb);
}
static void stream_start(struct usb_stream_kernel *sk,
struct urb *inurb, struct urb *outurb)
{
struct usb_stream *s = sk->s;
if (s->state >= usb_stream_sync1) {
int l, p, max_diff, max_diff_0;
int urb_size = 0;
unsigned frames_per_packet, min_frames = 0;
frames_per_packet = (s->period_size - s->idle_insize);
frames_per_packet <<= 8;
frames_per_packet /=
s->cfg.frame_size * inurb->number_of_packets;
frames_per_packet++;
max_diff_0 = s->cfg.frame_size;
if (s->cfg.period_frames >= 256)
max_diff_0 <<= 1;
if (s->cfg.period_frames >= 1024)
max_diff_0 <<= 1;
max_diff = max_diff_0;
for (p = 0; p < inurb->number_of_packets; ++p) {
int diff;
l = inurb->iso_frame_desc[p].actual_length;
urb_size += l;
min_frames += frames_per_packet;
diff = urb_size -
(min_frames >> 8) * s->cfg.frame_size;
if (diff < max_diff) {
snd_printdd(KERN_DEBUG "%i %i %i %i\n",
s->insize_done,
urb_size / (int)s->cfg.frame_size,
inurb->number_of_packets, diff);
max_diff = diff;
}
}
s->idle_insize -= max_diff - max_diff_0;
s->idle_insize += urb_size - s->period_size;
if (s->idle_insize < 0) {
snd_printk("%i %i %i\n",
s->idle_insize, urb_size, s->period_size);
return;
} else if (s->idle_insize == 0) {
s->next_inpacket_split =
(s->inpacket_head + 1) % s->inpackets;
s->next_inpacket_split_at = 0;
} else {
unsigned split = s->inpacket_head;
l = s->idle_insize;
while (l > s->inpacket[split].length) {
l -= s->inpacket[split].length;
if (split == 0)
split = s->inpackets - 1;
else
split--;
}
s->next_inpacket_split = split;
s->next_inpacket_split_at =
s->inpacket[split].length - l;
}
s->insize_done += urb_size;
if (usb_stream_prepare_playback(sk, inurb) < 0)
return;
} else
playback_prep_freqn(sk, sk->idle_outurb);
if (submit_urbs(sk, inurb, outurb) < 0)
return;
if (s->state == usb_stream_sync1 && s->insize_done > 360000) {
/* just guesswork ^^^^^^ */
s->state = usb_stream_ready;
subs_set_complete(sk->inurb, i_capture_idle);
subs_set_complete(sk->outurb, i_playback_idle);
}
}
static void i_capture_start(struct urb *urb)
{
struct usb_iso_packet_descriptor *id = urb->iso_frame_desc;
struct usb_stream_kernel *sk = urb->context;
struct usb_stream *s = sk->s;
int p;
int empty = 0;
if (urb->status) {
snd_printk(KERN_WARNING "status=%i\n", urb->status);
return;
}
for (p = 0; p < urb->number_of_packets; ++p) {
int l = id[p].actual_length;
if (l < s->cfg.frame_size) {
++empty;
if (s->state >= usb_stream_sync0) {
snd_printk(KERN_WARNING "%i\n", l);
return;
}
}
s->inpacket_head++;
s->inpacket_head %= s->inpackets;
s->inpacket[s->inpacket_head].offset =
id[p].offset + (urb->transfer_buffer - (void *)s);
s->inpacket[s->inpacket_head].length = l;
}
#ifdef SHOW_EMPTY
if (empty) {
printk(KERN_DEBUG"%s:%i: %i", __func__, __LINE__,
urb->iso_frame_desc[0].actual_length);
for (pack = 1; pack < urb->number_of_packets; ++pack) {
int l = urb->iso_frame_desc[pack].actual_length;
printk(" %i", l);
}
printk("\n");
}
#endif
if (!empty && s->state < usb_stream_sync1)
++s->state;
if (balance_capture(sk, urb))
stream_start(sk, urb, sk->i_urb);
}
static void i_playback_start(struct urb *urb)
{
struct usb_stream_kernel *sk = urb->context;
if (balance_playback(sk, urb))
stream_start(sk, sk->i_urb, urb);
}
int usb_stream_start(struct usb_stream_kernel *sk)
{
struct usb_stream *s = sk->s;
int frame = 0, iters = 0;
int u, err;
int try = 0;
if (s->state != usb_stream_stopped)
return -EAGAIN;
subs_set_complete(sk->inurb, i_capture_start);
subs_set_complete(sk->outurb, i_playback_start);
memset(sk->write_page, 0, s->write_size);
dotry:
s->insize_done = 0;
s->idle_insize = 0;
s->idle_outsize = 0;
s->sync_packet = -1;
s->inpacket_head = -1;
sk->iso_frame_balance = 0;
++try;
for (u = 0; u < 2; u++) {
struct urb *inurb = sk->inurb[u];
struct urb *outurb = sk->outurb[u];
playback_prep_freqn(sk, outurb);
inurb->number_of_packets = outurb->number_of_packets;
inurb->transfer_buffer_length =
inurb->number_of_packets *
inurb->iso_frame_desc[0].length;
preempt_disable();
if (u == 0) {
int now;
struct usb_device *dev = inurb->dev;
frame = usb_get_current_frame_number(dev);
do {
now = usb_get_current_frame_number(dev);
++iters;
} while (now > -1 && now == frame);
}
err = usb_submit_urb(inurb, GFP_ATOMIC);
if (err < 0) {
preempt_enable();
snd_printk(KERN_ERR"usb_submit_urb(sk->inurb[%i])"
" returned %i\n", u, err);
return err;
}
err = usb_submit_urb(outurb, GFP_ATOMIC);
if (err < 0) {
preempt_enable();
snd_printk(KERN_ERR"usb_submit_urb(sk->outurb[%i])"
" returned %i\n", u, err);
return err;
}
preempt_enable();
if (inurb->start_frame != outurb->start_frame) {
snd_printd(KERN_DEBUG
"u[%i] start_frames differ in:%u out:%u\n",
u, inurb->start_frame, outurb->start_frame);
goto check_retry;
}
}
snd_printdd(KERN_DEBUG "%i %i\n", frame, iters);
try = 0;
check_retry:
if (try) {
usb_stream_stop(sk);
if (try < 5) {
msleep(1500);
snd_printd(KERN_DEBUG "goto dotry;\n");
goto dotry;
}
snd_printk(KERN_WARNING"couldn't start"
" all urbs on the same start_frame.\n");
return -EFAULT;
}
sk->idle_inurb = sk->inurb[USB_STREAM_NURBS - 2];
sk->idle_outurb = sk->outurb[USB_STREAM_NURBS - 2];
sk->completed_inurb = sk->inurb[USB_STREAM_NURBS - 1];
sk->completed_outurb = sk->outurb[USB_STREAM_NURBS - 1];
/* wait, check */
{
int wait_ms = 3000;
while (s->state != usb_stream_ready && wait_ms > 0) {
snd_printdd(KERN_DEBUG "%i\n", s->state);
msleep(200);
wait_ms -= 200;
}
}
return s->state == usb_stream_ready ? 0 : -EFAULT;
}
/* stop */
void usb_stream_stop(struct usb_stream_kernel *sk)
{
int u;
if (!sk->s)
return;
for (u = 0; u < USB_STREAM_NURBS; ++u) {
usb_kill_urb(sk->inurb[u]);
usb_kill_urb(sk->outurb[u]);
}
sk->s->state = usb_stream_stopped;
msleep(400);
}

112
sound/usb/usx2y/usb_stream.h Normal file
View file

@ -0,0 +1,112 @@
/*
* Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.de>
*
* 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; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define USB_STREAM_INTERFACE_VERSION 2
#define SNDRV_USB_STREAM_IOCTL_SET_PARAMS \
_IOW('H', 0x90, struct usb_stream_config)
struct usb_stream_packet {
unsigned offset;
unsigned length;
};
struct usb_stream_config {
unsigned version;
unsigned sample_rate;
unsigned period_frames;
unsigned frame_size;
};
struct usb_stream {
struct usb_stream_config cfg;
unsigned read_size;
unsigned write_size;
int period_size;
unsigned state;
int idle_insize;
int idle_outsize;
int sync_packet;
unsigned insize_done;
unsigned periods_done;
unsigned periods_polled;
struct usb_stream_packet outpacket[2];
unsigned inpackets;
unsigned inpacket_head;
unsigned inpacket_split;
unsigned inpacket_split_at;
unsigned next_inpacket_split;
unsigned next_inpacket_split_at;
struct usb_stream_packet inpacket[0];
};
enum usb_stream_state {
usb_stream_invalid,
usb_stream_stopped,
usb_stream_sync0,
usb_stream_sync1,
usb_stream_ready,
usb_stream_running,
usb_stream_xrun,
};
#if __KERNEL__
#define USB_STREAM_NURBS 4
#define USB_STREAM_URBDEPTH 4
struct usb_stream_kernel {
struct usb_stream *s;
void *write_page;
unsigned n_o_ps;
struct urb *inurb[USB_STREAM_NURBS];
struct urb *idle_inurb;
struct urb *completed_inurb;
struct urb *outurb[USB_STREAM_NURBS];
struct urb *idle_outurb;
struct urb *completed_outurb;
struct urb *i_urb;
int iso_frame_balance;
wait_queue_head_t sleep;
unsigned out_phase;
unsigned out_phase_peeked;
unsigned freqn;
};
struct usb_stream *usb_stream_new(struct usb_stream_kernel *sk,
struct usb_device *dev,
unsigned in_endpoint, unsigned out_endpoint,
unsigned sample_rate, unsigned use_packsize,
unsigned period_frames, unsigned frame_size);
void usb_stream_free(struct usb_stream_kernel *);
int usb_stream_start(struct usb_stream_kernel *);
void usb_stream_stop(struct usb_stream_kernel *);
#endif