void usb_host_cdc_acm_event
(
/* [IN] pointer to device instance */
_usb_device_instance_handle dev_handle,
/* [IN] pointer to interface descriptor */
_usb_interface_descriptor_handle intf_handle,
/* [IN] code number for event causing callback */
uint_32 event_code
)
{ /* Body */
INTERFACE_DESCRIPTOR_PTR intf_ptr = (INTERFACE_DESCRIPTOR_PTR)intf_handle;
fflush(stdout);
switch (event_code) {
case USB_CONFIG_EVENT:
/* Drop through into attach, same processing */
case USB_ATTACH_EVENT: {
USB_CDC_DESC_ACM_PTR acm_desc = NULL;
USB_CDC_DESC_CM_PTR cm_desc = NULL;
USB_CDC_DESC_HEADER_PTR header_desc = NULL;
USB_CDC_DESC_UNION_PTR union_desc = NULL;
/* finds all the descriptors in the configuration */
if (USB_OK != usb_class_cdc_get_acm_descriptors(dev_handle,
intf_handle,
&acm_desc,
&cm_desc,
&header_desc,
&union_desc))
break;
/* initialize new interface members and select this interface */
if (USB_OK != _usb_hostdev_select_interface(dev_handle,
intf_handle, (pointer)&acm_device.CLASS_INTF))
{
break;
}
/* set all info got from descriptors to the class interface struct */
usb_class_cdc_set_acm_descriptors((pointer)&acm_device.CLASS_INTF,
acm_desc, cm_desc, header_desc, union_desc);
/* link all already registered data interfaces to this ACM control, if needed */
if (USB_OK != usb_class_cdc_bind_data_interfaces(dev_handle, (pointer)&acm_device.CLASS_INTF)) {
break;
}
printf("----- CDC control interface attach Event -----\n");
fflush(stdout);
printf("State = attached");
printf(" Class = %d", intf_ptr->bInterfaceClass);
printf(" SubClass = %d", intf_ptr->bInterfaceSubClass);
printf(" Protocol = %d\n", intf_ptr->bInterfaceProtocol);
fflush(stdout);
break;
}
case USB_INTF_EVENT:
{
CLASS_CALL_STRUCT_PTR acm_parser;
USB_STATUS status;
if (NULL == (acm_parser = usb_class_cdc_get_ctrl_interface(intf_handle)))
break;
if (MQX_OK != usb_class_cdc_acm_use_lwevent(acm_parser, &acm_device.acm_event))
break;
status = usb_class_cdc_init_ipipe(acm_parser);
if ((status != USB_OK) && (status != USBERR_OPEN_PIPE_FAILED))
break;
printf("----- CDC control interface selected -----\n");
break;
}
case USB_DETACH_EVENT:
{
CLASS_CALL_STRUCT_PTR acm_parser;
if (NULL == (acm_parser = usb_class_cdc_get_ctrl_interface(intf_handle)))
break;
/* Allow tasks waiting for acm to be finished...
** We will not wait here - in the interrupt context.
** For simplification, we dont use any semaphore to indicate that
** all tasks have finished its job with device. Instead, we are just
** informed them that device is detached and we rely on USB stack layer
** that its check of the available device returns false.
** The code that would synchronize tasks to be finished would look like:
**
** _lwsem_wait(tasks_using_device_semaphore);
**
** where the semaphore would be signalled from this interrupt.
*/
usb_class_cdc_unbind_data_interfaces(acm_parser);
/* Use only the interface with desired protocol */
printf("----- CDC control interface detach event -----\n");
fflush(stdout);
printf("State = detached");
printf(" Class = %d", intf_ptr->bInterfaceClass);
printf(" SubClass = %d", intf_ptr->bInterfaceSubClass);
printf(" Protocol = %d\n", intf_ptr->bInterfaceProtocol);
fflush(stdout);
break;
}
default:
printf("CDC device: unknown control event\n");
fflush(stdout);
break;
} /* EndSwitch */
} /* Endbody */
void usb_host_cdc_acm_event
(
/* [IN] pointer to device instance */
_usb_device_instance_handle dev_handle,
/* [IN] pointer to interface descriptor */
_usb_interface_descriptor_handle intf_handle,
/* [IN] code number for event causing callback */
uint_32 event_code
)
{ /* Body */
INTERFACE_DESCRIPTOR_PTR intf_ptr = (INTERFACE_DESCRIPTOR_PTR)intf_handle;
ACM_DEVICE_STRUCT_PTR acm_device;
#if 0 /* << EST */
fflush(stdout);
#endif
switch (event_code)
{
case USB_CONFIG_EVENT:
/* Drop through into attach, same processing */
case USB_ATTACH_EVENT:
{
USB_CDC_DESC_ACM_PTR acm_desc = NULL;
USB_CDC_DESC_CM_PTR cm_desc = NULL;
USB_CDC_DESC_HEADER_PTR header_desc = NULL;
USB_CDC_DESC_UNION_PTR union_desc = NULL;
int_32 external_data = 0;
/* finds all the descriptors in the configuration */
if (USB_OK != usb_class_cdc_get_acm_descriptors(dev_handle,
intf_handle,
&acm_desc,
&cm_desc,
&header_desc,
&union_desc))
break;
/* we can allocate new acm device */
if (NULL == (acm_device = USB_mem_alloc_zero(sizeof(ACM_DEVICE_STRUCT))))
break;
/* initialize new interface members and select this interface */
if (USB_OK != _usb_hostdev_select_interface(dev_handle,
intf_handle, (pointer)&acm_device->CLASS_INTF))
{
free(acm_device);
break;
}
/* set all info got from descriptors to the class interface struct */
usb_class_cdc_set_acm_descriptors((pointer)&acm_device->CLASS_INTF,
acm_desc, cm_desc, header_desc, union_desc);
/* link all already registered data interfaces to this ACM control, if needed */
if (USB_OK != usb_class_cdc_bind_data_interfaces(dev_handle, (pointer)&acm_device->CLASS_INTF))
{
free(acm_device);
break;
}
#if 0 /* << EST */
printf("----- CDC control interface attach Event -----\n");
fflush(stdout);
printf("State = attached");
printf(" Class = %%d", intf_ptr->bInterfaceClass);
printf(" SubClass = %%d", intf_ptr->bInterfaceSubClass);
printf(" Protocol = %%d\n", intf_ptr->bInterfaceProtocol);
fflush(stdout);
#endif
check_open = 0;
break;
}
case USB_INTF_EVENT:
{
CLASS_CALL_STRUCT_PTR acm_parser;
USB_STATUS status;
if (NULL == (acm_parser = usb_class_cdc_get_ctrl_interface(intf_handle)))
break;
status = usb_class_cdc_init_ipipe(acm_parser);
if ((status != USB_OK) && (status != USBERR_OPEN_PIPE_FAILED))
break;
#if 0 /* << EST */
printf("----- CDC control interface selected -----\n");
#endif
break;
}
case USB_DETACH_EVENT:
{
CLASS_CALL_STRUCT_PTR acm_parser;
USB_ACM_CLASS_INTF_STRUCT_PTR if_ptr;
if (NULL == (acm_parser = usb_class_cdc_get_ctrl_interface(intf_handle)))
break;
if_ptr = (USB_ACM_CLASS_INTF_STRUCT_PTR) acm_parser->class_intf_handle;
_usb_event_set(&if_ptr->acm_event, USB_ACM_DETACH); /* mark we are not using input pipe */
/* Allow tasks waiting for acm to be finished...
** This does have sense only if this task will not be active
** or scheduler switches to another task.
** For simplification, we dont use any semaphore to indicate that
** all tasks have finished its job with device. Instead, we have just
** informed them that device is detached and we rely on USB stack layer
** that it checking if the device is available returns false.
** The code that would synchronize tasks to be finished would look like:
**
** _lwsem_wait(if_ptr->device_using_tasks);
*/
usb_class_cdc_unbind_data_interfaces(acm_parser);
USB_unlock();
free(acm_parser);
/* Use only the interface with desired protocol */
#if 0 /* << EST */
printf("----- CDC control interface detach event -----\n");
fflush(stdout);
printf("State = detached");
printf(" Class = %%d", intf_ptr->bInterfaceClass);
printf(" SubClass = %%d", intf_ptr->bInterfaceSubClass);
printf(" Protocol = %%d\n", intf_ptr->bInterfaceProtocol);
fflush(stdout);
#endif
break;
}
break;
default:
#if 0 /* << EST */
printf("CDC device: unknown control event\n");
fflush(stdout);
#endif
break;
} /* EndSwitch */
} /* Endbody */
