void snd_usb_caiaq_audio_free(struct snd_usb_caiaqdev *dev)
{
debug("%s(%p)\n", __func__, dev);
stream_stop(dev);
free_urbs(dev->data_urbs_in);
free_urbs(dev->data_urbs_out);
kfree(dev->data_cb_info);
}
/*------------------------------------------------------------
函数原型: void trigger_tty()
描述: 建立NDISTTY状态机的触发器函数,由usbnet的probe探测函数在查询
到Rm Net接口后，并成功配置完中断通道、批量数据通道以后调用，
trigger_tty触发器函数内部开始初始化所有要用的内部缓冲区结构、
内部匹配数据结构、调用建立NDIS消息接口的内部过程，调用函数查
询网络是否支持QOS，并在建立成功以后注册设备文件结点。
输入: 无
输出: 成功建立消息接口后，会注册设备文件结点；否则不注册，建立失败
返回值: 无
-------------------------------------------------------------*/
int trigger_tty(void)
{
int i = 0;
p_int_urb = NULL;
connect_stat = 1;
NDIS_DEBUG_MSG("trigger_tty is running!\n");
NDIS_DEBUG_MSG("bEpAddress=0x%0x, bInterval=0x%0x\n", ep_int_rmnet->bEndpointAddress, ep_int_rmnet->bInterval);
/* 分配消息缓冲区 */
message_area = kmalloc(sizeof(*message_area), GFP_KERNEL);
if (NULL == message_area)
{
printk("%s: Kmalloc the buffer failed.\n", __FUNCTION__);
return -ENOMEM;
}
NDIS_DEBUG_MSG("alloc area ok [%d]\n", sizeof(*message_area));
/* 初始化内部变量和消息节点 */
init_dev_message_node_and_area();
/*初始化所用到链表头*/
INIT_LIST_HEAD(&free_list);
/*每一个消息结点的读写缓冲区指针指向相应行坐标所指向的数组的*
*SDU的起始位置，消息结点的坐标成员赋为对应的行坐标。在初始阶*
段所有的消息结点都链入空闲消息链表中。*/
for (i = 0; i < MSG_ROW; ++i)
{
message_node[i].p_msg_array = MEG_ROW(i);
message_node[i].row_num = (unsigned int)i;
list_add_tail((plisthead) & message_node[i].ptr_ndis_node, &free_list);
}
/* alloc urbs */
for (i = 0; i < MSG_ROW; ++i)
{
message_node[i].purb = usb_alloc_urb (0, GFP_KERNEL);
if (!message_node[i].purb)
{
printk("%s - No free urbs available, i = %d\n", __FUNCTION__, i);
/* free all non-null urb */
free_urbs();
//return -ENOMEM;
}
}
/* 初始化读写节点 */
pndis_write_node = (PNDIS_NODE)&(message_node[0]);
pndis_read_node = (PNDIS_NODE)&(message_node[1]);
NDIS_DEBUG_MSG("trigger_tty ok\n");
return 0;
}
/*------------------------------------------------------------
函数原型: void exit_tty()
描述: 退出NDISTTY状态机的函数。目前对于退出时机的考虑主要是在无
线模块复位后，USB连接被复位，Usbnet调用disconnect方法，在
usbnet的disconnect方法中调用 exit_tty ，使NDISTTY状态机撤
销。
输入: 无
输出: 设备文件结点被注销
返回值: 无
-------------------------------------------------------------*/
int exit_tty(void)
{
free_urbs();
connect_stat = 0;
intr_setup_flag = 0;
if (NULL != message_area)
{
kfree(message_area);
}
NDIS_DEBUG_MSG("exit_tty\n");
return 0;
}
static int alloc_urbs(struct atusb *atusb, int n)
{
struct urb *urb;
while (n) {
urb = usb_alloc_urb(0, GFP_KERNEL);
if (!urb) {
free_urbs(atusb);
return -ENOMEM;
}
usb_anchor_urb(urb, &atusb->idle_urbs);
n--;
}
return 0;
}
static void cleanup(struct wdm_device *desc)
{
usb_free_coherent(interface_to_usbdev(desc->intf),
desc->wMaxPacketSize,
desc->sbuf,
desc->validity->transfer_dma);
usb_free_coherent(interface_to_usbdev(desc->intf),
desc->bMaxPacketSize0,
desc->inbuf,
desc->response->transfer_dma);
kfree(desc->orq);
kfree(desc->irq);
kfree(desc->ubuf);
free_urbs(desc);
kfree(desc);
}
static int wdm_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
int rv = -EINVAL;
struct usb_device *udev = interface_to_usbdev(intf);
struct wdm_device *desc;
struct usb_host_interface *iface;
struct usb_endpoint_descriptor *ep;
struct usb_cdc_dmm_desc *dmhd;
u8 *buffer = intf->altsetting->extra;
int buflen = intf->altsetting->extralen;
u16 maxcom = 0;
if (!buffer)
goto out;
while (buflen > 2) {
if (buffer [1] != USB_DT_CS_INTERFACE) {
dev_err(&intf->dev, "skipping garbage\n");
goto next_desc;
}
switch (buffer [2]) {
case USB_CDC_HEADER_TYPE:
break;
case USB_CDC_DMM_TYPE:
dmhd = (struct usb_cdc_dmm_desc *)buffer;
maxcom = le16_to_cpu(dmhd->wMaxCommand);
dev_dbg(&intf->dev,
"Finding maximum buffer length: %d", maxcom);
break;
default:
dev_err(&intf->dev,
"Ignoring extra header, type %d, length %d\n",
buffer[2], buffer[0]);
break;
}
next_desc:
buflen -= buffer[0];
buffer += buffer[0];
}
rv = -ENOMEM;
desc = kzalloc(sizeof(struct wdm_device), GFP_KERNEL);
if (!desc)
goto out;
mutex_init(&desc->lock);
spin_lock_init(&desc->iuspin);
init_waitqueue_head(&desc->wait);
desc->wMaxCommand = maxcom;
/* this will be expanded and needed in hardware endianness */
desc->inum = cpu_to_le16((u16)intf->cur_altsetting->desc.bInterfaceNumber);
desc->intf = intf;
INIT_WORK(&desc->rxwork, wdm_rxwork);
rv = -EINVAL;
iface = intf->cur_altsetting;
if (iface->desc.bNumEndpoints != 1)
goto err;
ep = &iface->endpoint[0].desc;
if (!ep || !usb_endpoint_is_int_in(ep))
goto err;
desc->wMaxPacketSize = usb_endpoint_maxp(ep);
desc->bMaxPacketSize0 = udev->descriptor.bMaxPacketSize0;
desc->orq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
if (!desc->orq)
goto err;
desc->irq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
if (!desc->irq)
goto err;
desc->validity = usb_alloc_urb(0, GFP_KERNEL);
if (!desc->validity)
goto err;
desc->response = usb_alloc_urb(0, GFP_KERNEL);
if (!desc->response)
goto err;
desc->command = usb_alloc_urb(0, GFP_KERNEL);
if (!desc->command)
goto err;
desc->ubuf = kmalloc(desc->wMaxCommand, GFP_KERNEL);
if (!desc->ubuf)
goto err;
desc->sbuf = usb_alloc_coherent(interface_to_usbdev(intf),
desc->wMaxPacketSize,
GFP_KERNEL,
&desc->validity->transfer_dma);
if (!desc->sbuf)
goto err;
desc->inbuf = usb_alloc_coherent(interface_to_usbdev(intf),
desc->bMaxPacketSize0,
GFP_KERNEL,
&desc->response->transfer_dma);
if (!desc->inbuf)
goto err2;
usb_fill_int_urb(
desc->validity,
interface_to_usbdev(intf),
usb_rcvintpipe(interface_to_usbdev(intf), ep->bEndpointAddress),
desc->sbuf,
desc->wMaxPacketSize,
wdm_int_callback,
desc,
ep->bInterval
);
desc->validity->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_set_intfdata(intf, desc);
rv = usb_register_dev(intf, &wdm_class);
if (rv < 0)
goto err3;
else
dev_info(&intf->dev, "cdc-wdm%d: USB WDM device\n",
intf->minor - WDM_MINOR_BASE);
out:
return rv;
err3:
usb_set_intfdata(intf, NULL);
usb_free_coherent(interface_to_usbdev(desc->intf),
desc->bMaxPacketSize0,
desc->inbuf,
desc->response->transfer_dma);
err2:
usb_free_coherent(interface_to_usbdev(desc->intf),
desc->wMaxPacketSize,
desc->sbuf,
desc->validity->transfer_dma);
err:
free_urbs(desc);
kfree(desc->ubuf);
kfree(desc->orq);
kfree(desc->irq);
kfree(desc);
return rv;
}
int snd_usb_caiaq_audio_init(struct snd_usb_caiaqdev *dev)
{
int i, ret;
dev->n_audio_in = max(dev->spec.num_analog_audio_in,
dev->spec.num_digital_audio_in) /
CHANNELS_PER_STREAM;
dev->n_audio_out = max(dev->spec.num_analog_audio_out,
dev->spec.num_digital_audio_out) /
CHANNELS_PER_STREAM;
dev->n_streams = max(dev->n_audio_in, dev->n_audio_out);
debug("dev->n_audio_in = %d\n", dev->n_audio_in);
debug("dev->n_audio_out = %d\n", dev->n_audio_out);
debug("dev->n_streams = %d\n", dev->n_streams);
if (dev->n_streams > MAX_STREAMS) {
log("unable to initialize device, too many streams.\n");
return -EINVAL;
}
ret = snd_pcm_new(dev->chip.card, dev->product_name, 0,
dev->n_audio_out, dev->n_audio_in, &dev->pcm);
if (ret < 0) {
log("snd_pcm_new() returned %d\n", ret);
return ret;
}
dev->pcm->private_data = dev;
strcpy(dev->pcm->name, dev->product_name);
memset(dev->sub_playback, 0, sizeof(dev->sub_playback));
memset(dev->sub_capture, 0, sizeof(dev->sub_capture));
memcpy(&dev->pcm_info, &snd_usb_caiaq_pcm_hardware,
sizeof(snd_usb_caiaq_pcm_hardware));
/* setup samplerates */
dev->samplerates = dev->pcm_info.rates;
switch (dev->chip.usb_id) {
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AK1):
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_RIGKONTROL3):
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_SESSIONIO):
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_GUITARRIGMOBILE):
dev->samplerates |= SNDRV_PCM_RATE_192000;
/* fall thru */
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO2DJ):
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO4DJ):
case USB_ID(USB_VID_NATIVEINSTRUMENTS, USB_PID_AUDIO8DJ):
dev->samplerates |= SNDRV_PCM_RATE_88200;
break;
}
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_PLAYBACK,
&snd_usb_caiaq_ops);
snd_pcm_set_ops(dev->pcm, SNDRV_PCM_STREAM_CAPTURE,
&snd_usb_caiaq_ops);
snd_pcm_lib_preallocate_pages_for_all(dev->pcm,
SNDRV_DMA_TYPE_CONTINUOUS,
snd_dma_continuous_data(GFP_KERNEL),
MAX_BUFFER_SIZE, MAX_BUFFER_SIZE);
dev->data_cb_info =
kmalloc(sizeof(struct snd_usb_caiaq_cb_info) * N_URBS,
GFP_KERNEL);
if (!dev->data_cb_info)
return -ENOMEM;
for (i = 0; i < N_URBS; i++) {
dev->data_cb_info[i].dev = dev;
dev->data_cb_info[i].index = i;
}
dev->data_urbs_in = alloc_urbs(dev, SNDRV_PCM_STREAM_CAPTURE, &ret);
if (ret < 0) {
kfree(dev->data_cb_info);
free_urbs(dev->data_urbs_in);
return ret;
}
dev->data_urbs_out = alloc_urbs(dev, SNDRV_PCM_STREAM_PLAYBACK, &ret);
if (ret < 0) {
kfree(dev->data_cb_info);
free_urbs(dev->data_urbs_in);
free_urbs(dev->data_urbs_out);
return ret;
}
return 0;
}
