drivers/xen/usbback/control.c

   1 /******************************************************************************
   2  * arch/xen/drivers/usbif/backend/control.c
   3  *
   4  * Routines for interfacing with the control plane.
   5  *
   6  * Copyright (c) 2004, Keir Fraser
   7  */
   8
   9 #include "common.h"
  10
  11 static void usbif_ctrlif_rx(ctrl_msg_t *msg, unsigned long id)
  12 {
  13     DPRINTK("Received usbif backend message, subtype=%d\n", msg->subtype);
  14
  15     switch ( msg->subtype )
  16     {
  17     case CMSG_USBIF_BE_CREATE:
  18         usbif_create((usbif_be_create_t *)&msg->msg[0]);
  19         break;
  20     case CMSG_USBIF_BE_DESTROY:
  21         usbif_destroy((usbif_be_destroy_t *)&msg->msg[0]);
  22         break;
  23     case CMSG_USBIF_BE_CONNECT:
  24         usbif_connect((usbif_be_connect_t *)&msg->msg[0]);
  25         break;
  26     case CMSG_USBIF_BE_DISCONNECT:
  27         if ( !usbif_disconnect((usbif_be_disconnect_t *)&msg->msg[0],msg->id) )
  28             return; /* Sending the response is deferred until later. */
  29         break;
  30     case CMSG_USBIF_BE_CLAIM_PORT:
  31         usbif_claim_port((usbif_be_claim_port_t *)&msg->msg[0]);
  32         break;
  33     case CMSG_USBIF_BE_RELEASE_PORT:
  34         usbif_release_port((usbif_be_release_port_t *)&msg->msg[0]);
  35         break;
  36     default:
  37         DPRINTK("Parse error while reading message subtype %d, len %d\n",
  38                 msg->subtype, msg->length);
  39         msg->length = 0;
  40         break;
  41     }
  42
  43     ctrl_if_send_response(msg);
  44 }
  45
  46 void usbif_ctrlif_init(void)
  47 {
  48     ctrl_msg_t                       cmsg;
  49     usbif_be_driver_status_changed_t st;
  50
  51     (void)ctrl_if_register_receiver(CMSG_USBIF_BE, usbif_ctrlif_rx,
  52                                     CALLBACK_IN_BLOCKING_CONTEXT);
  53
  54     /* Send a driver-UP notification to the domain controller. */
  55     cmsg.type      = CMSG_USBIF_BE;
  56     cmsg.subtype   = CMSG_USBIF_BE_DRIVER_STATUS_CHANGED;
  57     cmsg.length    = sizeof(usbif_be_driver_status_changed_t);
  58     st.status      = USBIF_DRIVER_STATUS_UP;
  59     memcpy(cmsg.msg, &st, sizeof(st));
  60     ctrl_if_send_message_block(&cmsg, NULL, 0, TASK_UNINTERRUPTIBLE);
  61 }