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usbdevice/core: add reset function to support hotplug 

When the USB got RESET packet from the host and the address is setup,
all the classes will got reset. The reset is done by class stop and than
class run. So the classes should reset their internal state in
class_{run,stop}.

Besides, the USB device driver could post a USB_MSG_RESET message on
every RESET packet.
This commit is contained in:
qiuyiuestc 2013-05-25 15:55:27 +08:00 committed by Grissiom
parent 046182be94
commit 97a507e667
2 changed files with 41 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
components/drivers/include/drivers/usb_device.h
View File

@ -145,6 +145,7 @@ enum udev_msg_type
USB_MSG_SETUP_NOTIFY,
USB_MSG_DATA_NOTIFY,
USB_MSG_SOF,
USB_MSG_RESET,
};
typedef enum udev_msg_type udev_msg_type;

33
components/drivers/usb/usbdevice/core/core.c
View File

@ -644,6 +644,35 @@ rt_err_t _sof_notify(udevice_t device)
return RT_EOK;
}
/**
* This function will reset all class.
*
* @param device the usb device object.
*
* @return RT_EOK.
*/
rt_err_t _reset_notify(udevice_t device)
{
struct rt_list_node *i;
uclass_t cls;
RT_ASSERT(device != RT_NULL);
/* to notity every class that sof event comes */
for (i=device->curr_cfg->cls_list.next;
i!=&device->curr_cfg->cls_list; i=i->next)
{
cls = (uclass_t)rt_list_entry(i, struct uclass, list);
if(cls->ops->stop != RT_NULL)
cls->ops->stop(device, cls);
if(cls->ops->run != RT_NULL)
cls->ops->run(device, cls);
}
return RT_EOK;
}
/**
* This function will create an usb device object.
*
@ -1360,6 +1389,10 @@ static void rt_usbd_thread_entry(void* parameter)
case USB_MSG_SETUP_NOTIFY:
_setup_request(device, (ureq_t)msg.content.setup_msg.packet);
break;
case USB_MSG_RESET:
if (device->state == USB_STATE_ADDRESS)
_reset_notify(device);
break;
default:
rt_kprintf("unknown msg type\n");
break;