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Add M2Tech hiFace USB-SPDIF driver

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Add driver for M2Tech hiFace USB-SPDIF interface and compatible devices.

M2Tech hiFace and compatible devices offer a Hi-End S/PDIF Output
Interface, see http://www.m2tech.biz/hiface.html

The supported products are:

  * M2Tech Young
  * M2Tech hiFace
  * M2Tech North Star
  * M2Tech W4S Young
  * M2Tech Corrson
  * M2Tech AUDIA
  * M2Tech SL Audio
  * M2Tech Empirical
  * M2Tech Rockna
  * M2Tech Pathos
  * M2Tech Metronome
  * M2Tech CAD
  * M2Tech Audio Esclusive
  * M2Tech Rotel
  * M2Tech Eeaudio
  * The Chord Company CHORD
  * AVA Group A/S Vitus

Signed-off-by: Antonio Ospite <ao2@amarulasolutions.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Antonio Ospite 2013-06-22 00:14:46 +02:00 committed by Takashi Iwai
parent 04c9548c78
commit a91c3fb2f8
7 changed files with 1006 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
sound/usb/Kconfig
View File

@ -115,5 +115,36 @@ config SND_USB_6FIRE
and further help can be found at
http://sixfireusb.sourceforge.net
config SND_USB_HIFACE
tristate "M2Tech hiFace USB-SPDIF driver"
select SND_PCM
help
Select this option to include support for M2Tech hiFace USB-SPDIF
interface.
This driver supports the original M2Tech hiFace and some other
compatible devices. The supported products are:
* M2Tech Young
* M2Tech hiFace
* M2Tech North Star
* M2Tech W4S Young
* M2Tech Corrson
* M2Tech AUDIA
* M2Tech SL Audio
* M2Tech Empirical
* M2Tech Rockna
* M2Tech Pathos
* M2Tech Metronome
* M2Tech CAD
* M2Tech Audio Esclusive
* M2Tech Rotel
* M2Tech Eeaudio
* The Chord Company CHORD
* AVA Group A/S Vitus
To compile this driver as a module, choose M here: the module
will be called snd-usb-hiface.
endif # SND_USB

2
sound/usb/Makefile
View File

@ -23,4 +23,4 @@ obj-$(CONFIG_SND_USB_UA101) += snd-usbmidi-lib.o
obj-$(CONFIG_SND_USB_USX2Y) += snd-usbmidi-lib.o
obj-$(CONFIG_SND_USB_US122L) += snd-usbmidi-lib.o
obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/
obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/

2
sound/usb/hiface/Makefile Normal file
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@ -0,0 +1,2 @@
snd-usb-hiface-objs := chip.o pcm.o
obj-$(CONFIG_SND_USB_HIFACE) += snd-usb-hiface.o

297
sound/usb/hiface/chip.c Normal file
View File

@ -0,0 +1,297 @@
/*
* Linux driver for M2Tech hiFace compatible devices
*
* Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
*
* Authors: Michael Trimarchi <michael@amarulasolutions.com>
* Antonio Ospite <ao2@amarulasolutions.com>
*
* The driver is based on the work done in TerraTec DMX 6Fire USB
*
* 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.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <sound/initval.h>
#include "chip.h"
#include "pcm.h"
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_AUTHOR("Antonio Ospite <ao2@amarulasolutions.com>");
MODULE_DESCRIPTION("M2Tech hiFace USB-SPDIF audio driver");
MODULE_LICENSE("GPL v2");
MODULE_SUPPORTED_DEVICE("{{M2Tech,Young},"
"{M2Tech,hiFace},"
"{M2Tech,North Star},"
"{M2Tech,W4S Young},"
"{M2Tech,Corrson},"
"{M2Tech,AUDIA},"
"{M2Tech,SL Audio},"
"{M2Tech,Empirical},"
"{M2Tech,Rockna},"
"{M2Tech,Pathos},"
"{M2Tech,Metronome},"
"{M2Tech,CAD},"
"{M2Tech,Audio Esclusive},"
"{M2Tech,Rotel},"
"{M2Tech,Eeaudio},"
"{The Chord Company,CHORD},"
"{AVA Group A/S,Vitus}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
#define DRIVER_NAME "snd-usb-hiface"
#define CARD_NAME "hiFace"
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
static DEFINE_MUTEX(register_mutex);
struct hiface_vendor_quirk {
const char *device_name;
u8 extra_freq;
};
static int hiface_chip_create(struct usb_device *device, int idx,
const struct hiface_vendor_quirk *quirk,
struct hiface_chip **rchip)
{
struct snd_card *card = NULL;
struct hiface_chip *chip;
int ret;
int len;
*rchip = NULL;
/* if we are here, card can be registered in alsa. */
ret = snd_card_create(index[idx], id[idx], THIS_MODULE, sizeof(*chip), &card);
if (ret < 0) {
dev_err(&device->dev, "cannot create alsa card.\n");
return ret;
}
strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
if (quirk && quirk->device_name)
strlcpy(card->shortname, quirk->device_name, sizeof(card->shortname));
else
strlcpy(card->shortname, "M2Tech generic audio", sizeof(card->shortname));
strlcat(card->longname, card->shortname, sizeof(card->longname));
len = strlcat(card->longname, " at ", sizeof(card->longname));
if (len < sizeof(card->longname))
usb_make_path(device, card->longname + len,
sizeof(card->longname) - len);
chip = card->private_data;
chip->dev = device;
chip->card = card;
*rchip = chip;
return 0;
}
static int hiface_chip_probe(struct usb_interface *intf,
const struct usb_device_id *usb_id)
{
const struct hiface_vendor_quirk *quirk = (struct hiface_vendor_quirk *)usb_id->driver_info;
int ret;
int i;
struct hiface_chip *chip;
struct usb_device *device = interface_to_usbdev(intf);
ret = usb_set_interface(device, 0, 0);
if (ret != 0) {
dev_err(&device->dev, "can't set first interface for " CARD_NAME " device.\n");
return -EIO;
}
/* check whether the card is already registered */
chip = NULL;
mutex_lock(&register_mutex);
for (i = 0; i < SNDRV_CARDS; i++)
if (enable[i])
break;
if (i >= SNDRV_CARDS) {
dev_err(&device->dev, "no available " CARD_NAME " audio device\n");
ret = -ENODEV;
goto err;
}
ret = hiface_chip_create(device, i, quirk, &chip);
if (ret < 0)
goto err;
snd_card_set_dev(chip->card, &intf->dev);
ret = hiface_pcm_init(chip, quirk ? quirk->extra_freq : 0);
if (ret < 0)
goto err_chip_destroy;
ret = snd_card_register(chip->card);
if (ret < 0) {
dev_err(&device->dev, "cannot register " CARD_NAME " card\n");
goto err_chip_destroy;
}
mutex_unlock(&register_mutex);
usb_set_intfdata(intf, chip);
return 0;
err_chip_destroy:
snd_card_free(chip->card);
err:
mutex_unlock(&register_mutex);
return ret;
}
static void hiface_chip_disconnect(struct usb_interface *intf)
{
struct hiface_chip *chip;
struct snd_card *card;
chip = usb_get_intfdata(intf);
if (!chip)
return;
card = chip->card;
/* Make sure that the userspace cannot create new request */
snd_card_disconnect(card);
hiface_pcm_abort(chip);
snd_card_free_when_closed(card);
}
static const struct usb_device_id device_table[] = {
{
USB_DEVICE(0x04b4, 0x0384),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Young",
.extra_freq = 1,
}
},
{
USB_DEVICE(0x04b4, 0x930b),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "hiFace",
}
},
{
USB_DEVICE(0x04b4, 0x931b),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "North Star",
}
},
{
USB_DEVICE(0x04b4, 0x931c),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "W4S Young",
}
},
{
USB_DEVICE(0x04b4, 0x931d),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Corrson",
}
},
{
USB_DEVICE(0x04b4, 0x931e),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "AUDIA",
}
},
{
USB_DEVICE(0x04b4, 0x931f),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "SL Audio",
}
},
{
USB_DEVICE(0x04b4, 0x9320),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Empirical",
}
},
{
USB_DEVICE(0x04b4, 0x9321),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Rockna",
}
},
{
USB_DEVICE(0x249c, 0x9001),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Pathos",
}
},
{
USB_DEVICE(0x249c, 0x9002),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Metronome",
}
},
{
USB_DEVICE(0x249c, 0x9006),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "CAD",
}
},
{
USB_DEVICE(0x249c, 0x9008),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Audio Esclusive",
}
},
{
USB_DEVICE(0x249c, 0x931c),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Rotel",
}
},
{
USB_DEVICE(0x249c, 0x932c),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Eeaudio",
}
},
{
USB_DEVICE(0x245f, 0x931c),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "CHORD",
}
},
{
USB_DEVICE(0x25c6, 0x9002),
.driver_info = (unsigned long)&(const struct hiface_vendor_quirk) {
.device_name = "Vitus",
}
},
{}
};
MODULE_DEVICE_TABLE(usb, device_table);
static struct usb_driver hiface_usb_driver = {
.name = DRIVER_NAME,
.probe = hiface_chip_probe,
.disconnect = hiface_chip_disconnect,
.id_table = device_table,
};
module_usb_driver(hiface_usb_driver);

30
sound/usb/hiface/chip.h Normal file
View File

@ -0,0 +1,30 @@
/*
* Linux driver for M2Tech hiFace compatible devices
*
* Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
*
* Authors: Michael Trimarchi <michael@amarulasolutions.com>
* Antonio Ospite <ao2@amarulasolutions.com>
*
* The driver is based on the work done in TerraTec DMX 6Fire USB
*
* 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.
*/
#ifndef HIFACE_CHIP_H
#define HIFACE_CHIP_H
#include <linux/usb.h>
#include <sound/core.h>
struct pcm_runtime;
struct hiface_chip {
struct usb_device *dev;
struct snd_card *card;
struct pcm_runtime *pcm;
};
#endif /* HIFACE_CHIP_H */

621
sound/usb/hiface/pcm.c Normal file
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@ -0,0 +1,621 @@
/*
* Linux driver for M2Tech hiFace compatible devices
*
* Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
*
* Authors: Michael Trimarchi <michael@amarulasolutions.com>
* Antonio Ospite <ao2@amarulasolutions.com>
*
* The driver is based on the work done in TerraTec DMX 6Fire USB
*
* 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.
*/
#include <linux/slab.h>
#include <sound/pcm.h>
#include "pcm.h"
#include "chip.h"
#define OUT_EP 0x2
#define PCM_N_URBS 8
#define PCM_PACKET_SIZE 4096
#define PCM_BUFFER_SIZE (2 * PCM_N_URBS * PCM_PACKET_SIZE)
struct pcm_urb {
struct hiface_chip *chip;
struct urb instance;
struct usb_anchor submitted;
u8 *buffer;
};
struct pcm_substream {
spinlock_t lock;
struct snd_pcm_substream *instance;
bool active;
snd_pcm_uframes_t dma_off; /* current position in alsa dma_area */
snd_pcm_uframes_t period_off; /* current position in current period */
};
enum { /* pcm streaming states */
STREAM_DISABLED, /* no pcm streaming */
STREAM_STARTING, /* pcm streaming requested, waiting to become ready */
STREAM_RUNNING, /* pcm streaming running */
STREAM_STOPPING
};
struct pcm_runtime {
struct hiface_chip *chip;
struct snd_pcm *instance;
struct pcm_substream playback;
bool panic; /* if set driver won't do anymore pcm on device */
struct pcm_urb out_urbs[PCM_N_URBS];
struct mutex stream_mutex;
u8 stream_state; /* one of STREAM_XXX */
u8 extra_freq;
wait_queue_head_t stream_wait_queue;
bool stream_wait_cond;
};
static const unsigned int rates[] = { 44100, 48000, 88200, 96000, 176400, 192000,
352800, 384000 };
static const struct snd_pcm_hw_constraint_list constraints_extra_rates = {
.count = ARRAY_SIZE(rates),
.list = rates,
.mask = 0,
};
static const struct snd_pcm_hardware pcm_hw = {
.info = SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_PAUSE |
SNDRV_PCM_INFO_MMAP_VALID |
SNDRV_PCM_INFO_BATCH,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
.rates = SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000,
.rate_min = 44100,
.rate_max = 192000, /* changes in hiface_pcm_open to support extra rates */
.channels_min = 2,
.channels_max = 2,
.buffer_bytes_max = PCM_BUFFER_SIZE,
.period_bytes_min = PCM_PACKET_SIZE,
.period_bytes_max = PCM_BUFFER_SIZE,
.periods_min = 2,
.periods_max = 1024
};
/* message values used to change the sample rate */
#define HIFACE_SET_RATE_REQUEST 0xb0
#define HIFACE_RATE_44100 0x43
#define HIFACE_RATE_48000 0x4b
#define HIFACE_RATE_88200 0x42
#define HIFACE_RATE_96000 0x4a
#define HIFACE_RATE_176400 0x40
#define HIFACE_RATE_192000 0x48
#define HIFACE_RATE_352000 0x58
#define HIFACE_RATE_384000 0x68
static int hiface_pcm_set_rate(struct pcm_runtime *rt, unsigned int rate)
{
struct usb_device *device = rt->chip->dev;
u16 rate_value;
int ret;
/* We are already sure that the rate is supported here thanks to
* ALSA constraints
*/
switch (rate) {
case 44100:
rate_value = HIFACE_RATE_44100;
break;
case 48000:
rate_value = HIFACE_RATE_48000;
break;
case 88200:
rate_value = HIFACE_RATE_88200;
break;
case 96000:
rate_value = HIFACE_RATE_96000;
break;
case 176400:
rate_value = HIFACE_RATE_176400;
break;
case 192000:
rate_value = HIFACE_RATE_192000;
break;
case 352000:
rate_value = HIFACE_RATE_352000;
break;
case 384000:
rate_value = HIFACE_RATE_384000;
break;
default:
dev_err(&device->dev, "Unsupported rate %d\n", rate);
return -EINVAL;
}
/*
* USBIO: Vendor 0xb0(wValue=0x0043, wIndex=0x0000)
* 43 b0 43 00 00 00 00 00
* USBIO: Vendor 0xb0(wValue=0x004b, wIndex=0x0000)
* 43 b0 4b 00 00 00 00 00
* This control message doesn't have any ack from the
* other side
*/
ret = usb_control_msg(device, usb_sndctrlpipe(device, 0),
HIFACE_SET_RATE_REQUEST,
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
rate_value, 0, NULL, 0, 100);
if (ret < 0) {
dev_err(&device->dev, "Error setting samplerate %d.\n", rate);
return ret;
}
return 0;
}
static struct pcm_substream *hiface_pcm_get_substream(struct snd_pcm_substream
*alsa_sub)
{
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
struct device *device = &rt->chip->dev->dev;
if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
return &rt->playback;
dev_err(device, "Error getting pcm substream slot.\n");
return NULL;
}
/* call with stream_mutex locked */
static void hiface_pcm_stream_stop(struct pcm_runtime *rt)
{
int i, time;
if (rt->stream_state != STREAM_DISABLED) {
rt->stream_state = STREAM_STOPPING;
for (i = 0; i < PCM_N_URBS; i++) {
time = usb_wait_anchor_empty_timeout(
&rt->out_urbs[i].submitted, 100);
if (!time)
usb_kill_anchored_urbs(
&rt->out_urbs[i].submitted);
usb_kill_urb(&rt->out_urbs[i].instance);
}
rt->stream_state = STREAM_DISABLED;
}
}
/* call with stream_mutex locked */
static int hiface_pcm_stream_start(struct pcm_runtime *rt)
{
int ret = 0;
int i;
if (rt->stream_state == STREAM_DISABLED) {
/* reset panic state when starting a new stream */
rt->panic = false;
/* submit our out urbs zero init */
rt->stream_state = STREAM_STARTING;
for (i = 0; i < PCM_N_URBS; i++) {
memset(rt->out_urbs[i].buffer, 0, PCM_PACKET_SIZE);
usb_anchor_urb(&rt->out_urbs[i].instance,
&rt->out_urbs[i].submitted);
ret = usb_submit_urb(&rt->out_urbs[i].instance,
GFP_ATOMIC);
if (ret) {
hiface_pcm_stream_stop(rt);
return ret;
}
}
/* wait for first out urb to return (sent in in urb handler) */
wait_event_timeout(rt->stream_wait_queue, rt->stream_wait_cond,
HZ);
if (rt->stream_wait_cond) {
struct device *device = &rt->chip->dev->dev;
dev_dbg(device, "%s: Stream is running wakeup event\n",
__func__);
rt->stream_state = STREAM_RUNNING;
} else {
hiface_pcm_stream_stop(rt);
return -EIO;
}
}
return ret;
}
/* The hardware wants word-swapped 32-bit values */
static void memcpy_swahw32(u8 *dest, u8 *src, unsigned int n)
{
unsigned int i;
for (i = 0; i < n / 4; i++)
((u32 *)dest)[i] = swahw32(((u32 *)src)[i]);
}
/* call with substream locked */
/* returns true if a period elapsed */
static bool hiface_pcm_playback(struct pcm_substream *sub, struct pcm_urb *urb)
{
struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
struct device *device = &urb->chip->dev->dev;
u8 *source;
unsigned int pcm_buffer_size;
WARN_ON(alsa_rt->format != SNDRV_PCM_FORMAT_S32_LE);
pcm_buffer_size = snd_pcm_lib_buffer_bytes(sub->instance);
if (sub->dma_off + PCM_PACKET_SIZE <= pcm_buffer_size) {
dev_dbg(device, "%s: (1) buffer_size %#x dma_offset %#x\n", __func__,
(unsigned int) pcm_buffer_size,
(unsigned int) sub->dma_off);
source = alsa_rt->dma_area + sub->dma_off;
memcpy_swahw32(urb->buffer, source, PCM_PACKET_SIZE);
} else {
/* wrap around at end of ring buffer */
unsigned int len;
dev_dbg(device, "%s: (2) buffer_size %#x dma_offset %#x\n", __func__,
(unsigned int) pcm_buffer_size,
(unsigned int) sub->dma_off);
len = pcm_buffer_size - sub->dma_off;
source = alsa_rt->dma_area + sub->dma_off;
memcpy_swahw32(urb->buffer, source, len);
source = alsa_rt->dma_area;
memcpy_swahw32(urb->buffer + len, source,
PCM_PACKET_SIZE - len);
}
sub->dma_off += PCM_PACKET_SIZE;
if (sub->dma_off >= pcm_buffer_size)
sub->dma_off -= pcm_buffer_size;
sub->period_off += PCM_PACKET_SIZE;
if (sub->period_off >= alsa_rt->period_size) {
sub->period_off %= alsa_rt->period_size;
return true;
}
return false;
}
static void hiface_pcm_out_urb_handler(struct urb *usb_urb)
{
struct pcm_urb *out_urb = usb_urb->context;
struct pcm_runtime *rt = out_urb->chip->pcm;
struct pcm_substream *sub;
bool do_period_elapsed = false;
unsigned long flags;
int ret;
if (rt->panic || rt->stream_state == STREAM_STOPPING)
return;
if (unlikely(usb_urb->status == -ENOENT || /* unlinked */
usb_urb->status == -ENODEV || /* device removed */
usb_urb->status == -ECONNRESET || /* unlinked */
usb_urb->status == -ESHUTDOWN)) { /* device disabled */
goto out_fail;
}
if (rt->stream_state == STREAM_STARTING) {
rt->stream_wait_cond = true;
wake_up(&rt->stream_wait_queue);
}
/* now send our playback data (if a free out urb was found) */
sub = &rt->playback;
spin_lock_irqsave(&sub->lock, flags);
if (sub->active)
do_period_elapsed = hiface_pcm_playback(sub, out_urb);
else
memset(out_urb->buffer, 0, PCM_PACKET_SIZE);
spin_unlock_irqrestore(&sub->lock, flags);
if (do_period_elapsed)
snd_pcm_period_elapsed(sub->instance);
ret = usb_submit_urb(&out_urb->instance, GFP_ATOMIC);
if (ret < 0)
goto out_fail;
return;
out_fail:
rt->panic = true;
}
static int hiface_pcm_open(struct snd_pcm_substream *alsa_sub)
{
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
struct pcm_substream *sub = NULL;
struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
int ret;
if (rt->panic)
return -EPIPE;
mutex_lock(&rt->stream_mutex);
alsa_rt->hw = pcm_hw;
if (alsa_sub->stream == SNDRV_PCM_STREAM_PLAYBACK)
sub = &rt->playback;
if (!sub) {
struct device *device = &rt->chip->dev->dev;
mutex_unlock(&rt->stream_mutex);
dev_err(device, "Invalid stream type\n");
return -EINVAL;
}
if (rt->extra_freq) {
alsa_rt->hw.rates |= SNDRV_PCM_RATE_KNOT;
alsa_rt->hw.rate_max = 384000;
/* explicit constraints needed as we added SNDRV_PCM_RATE_KNOT */
ret = snd_pcm_hw_constraint_list(alsa_sub->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&constraints_extra_rates);
if (ret < 0) {
mutex_unlock(&rt->stream_mutex);
return ret;
}
}
sub->instance = alsa_sub;
sub->active = false;
mutex_unlock(&rt->stream_mutex);
return 0;
}
static int hiface_pcm_close(struct snd_pcm_substream *alsa_sub)
{
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);
unsigned long flags;
if (rt->panic)
return 0;
mutex_lock(&rt->stream_mutex);
if (sub) {
hiface_pcm_stream_stop(rt);
/* deactivate substream */
spin_lock_irqsave(&sub->lock, flags);
sub->instance = NULL;
sub->active = false;
spin_unlock_irqrestore(&sub->lock, flags);
}
mutex_unlock(&rt->stream_mutex);
return 0;
}
static int hiface_pcm_hw_params(struct snd_pcm_substream *alsa_sub,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_alloc_vmalloc_buffer(alsa_sub,
params_buffer_bytes(hw_params));
}
static int hiface_pcm_hw_free(struct snd_pcm_substream *alsa_sub)
{
return snd_pcm_lib_free_vmalloc_buffer(alsa_sub);
}
static int hiface_pcm_prepare(struct snd_pcm_substream *alsa_sub)
{
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);
struct snd_pcm_runtime *alsa_rt = alsa_sub->runtime;
int ret;
if (rt->panic)
return -EPIPE;
if (!sub)
return -ENODEV;
mutex_lock(&rt->stream_mutex);
sub->dma_off = 0;
sub->period_off = 0;
if (rt->stream_state == STREAM_DISABLED) {
ret = hiface_pcm_set_rate(rt, alsa_rt->rate);
if (ret) {
mutex_unlock(&rt->stream_mutex);
return ret;
}
ret = hiface_pcm_stream_start(rt);
if (ret) {
mutex_unlock(&rt->stream_mutex);
return ret;
}
}
mutex_unlock(&rt->stream_mutex);
return 0;
}
static int hiface_pcm_trigger(struct snd_pcm_substream *alsa_sub, int cmd)
{
struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
if (rt->panic)
return -EPIPE;
if (!sub)
return -ENODEV;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
spin_lock_irq(&sub->lock);
sub->active = true;
spin_unlock_irq(&sub->lock);
return 0;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
spin_lock_irq(&sub->lock);
sub->active = false;
spin_unlock_irq(&sub->lock);
return 0;
default:
return -EINVAL;
}
}
static snd_pcm_uframes_t hiface_pcm_pointer(struct snd_pcm_substream *alsa_sub)
{
struct pcm_substream *sub = hiface_pcm_get_substream(alsa_sub);
struct pcm_runtime *rt = snd_pcm_substream_chip(alsa_sub);
unsigned long flags;
snd_pcm_uframes_t dma_offset;
if (rt->panic || !sub)
return SNDRV_PCM_STATE_XRUN;
spin_lock_irqsave(&sub->lock, flags);
dma_offset = sub->dma_off;
spin_unlock_irqrestore(&sub->lock, flags);
return bytes_to_frames(alsa_sub->runtime, dma_offset);
}
static struct snd_pcm_ops pcm_ops = {
.open = hiface_pcm_open,
.close = hiface_pcm_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = hiface_pcm_hw_params,
.hw_free = hiface_pcm_hw_free,
.prepare = hiface_pcm_prepare,
.trigger = hiface_pcm_trigger,
.pointer = hiface_pcm_pointer,
.page = snd_pcm_lib_get_vmalloc_page,
.mmap = snd_pcm_lib_mmap_vmalloc,
};
static int hiface_pcm_init_urb(struct pcm_urb *urb,
struct hiface_chip *chip,
unsigned int ep,
void (*handler)(struct urb *))
{
urb->chip = chip;
usb_init_urb(&urb->instance);
urb->buffer = kzalloc(PCM_PACKET_SIZE, GFP_KERNEL);
if (!urb->buffer)
return -ENOMEM;
usb_fill_bulk_urb(&urb->instance, chip->dev,
usb_sndbulkpipe(chip->dev, ep), (void *)urb->buffer,
PCM_PACKET_SIZE, handler, urb);
init_usb_anchor(&urb->submitted);
return 0;
}
void hiface_pcm_abort(struct hiface_chip *chip)
{
struct pcm_runtime *rt = chip->pcm;
if (rt) {
rt->panic = true;
mutex_lock(&rt->stream_mutex);
hiface_pcm_stream_stop(rt);
mutex_unlock(&rt->stream_mutex);
}
}
static void hiface_pcm_destroy(struct hiface_chip *chip)
{
struct pcm_runtime *rt = chip->pcm;
int i;
for (i = 0; i < PCM_N_URBS; i++)
kfree(rt->out_urbs[i].buffer);
kfree(chip->pcm);
chip->pcm = NULL;
}
static void hiface_pcm_free(struct snd_pcm *pcm)
{
struct pcm_runtime *rt = pcm->private_data;
if (rt)
hiface_pcm_destroy(rt->chip);
}
int hiface_pcm_init(struct hiface_chip *chip, u8 extra_freq)
{
int i;
int ret;
struct snd_pcm *pcm;
struct pcm_runtime *rt;
rt = kzalloc(sizeof(*rt), GFP_KERNEL);
if (!rt)
return -ENOMEM;
rt->chip = chip;
rt->stream_state = STREAM_DISABLED;
if (extra_freq)
rt->extra_freq = 1;
init_waitqueue_head(&rt->stream_wait_queue);
mutex_init(&rt->stream_mutex);
spin_lock_init(&rt->playback.lock);
for (i = 0; i < PCM_N_URBS; i++)
hiface_pcm_init_urb(&rt->out_urbs[i], chip, OUT_EP,
hiface_pcm_out_urb_handler);
ret = snd_pcm_new(chip->card, "USB-SPDIF Audio", 0, 1, 0, &pcm);
if (ret < 0) {
kfree(rt);
dev_err(&chip->dev->dev, "Cannot create pcm instance\n");
return ret;
}
pcm->private_data = rt;
pcm->private_free = hiface_pcm_free;
strlcpy(pcm->name, "USB-SPDIF Audio", sizeof(pcm->name));
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_ops);
rt->instance = pcm;
chip->pcm = rt;
return 0;
}

24
sound/usb/hiface/pcm.h Normal file
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@ -0,0 +1,24 @@
/*
* Linux driver for M2Tech hiFace compatible devices
*
* Copyright 2012-2013 (C) M2TECH S.r.l and Amarula Solutions B.V.
*
* Authors: Michael Trimarchi <michael@amarulasolutions.com>
* Antonio Ospite <ao2@amarulasolutions.com>
*
* The driver is based on the work done in TerraTec DMX 6Fire USB
*
* 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.
*/
#ifndef HIFACE_PCM_H
#define HIFACE_PCM_H
struct hiface_chip;
int hiface_pcm_init(struct hiface_chip *chip, u8 extra_freq);
void hiface_pcm_abort(struct hiface_chip *chip);
#endif /* HIFACE_PCM_H */