drivers/printer/liveupdate.c

   1 #include <minix/drivers.h>
   2
   3 /* State management variables. */
   4 EXTERN int writing;
   5 EXTERN int is_status_msg_expected;
   6
   7 /* Custom states definition. */
   8 #define PR_STATE_WRITE_PROTOCOL_FREE    (SEF_LU_STATE_CUSTOM_BASE + 0)
   9 #define PR_STATE_IS_CUSTOM(s)   ((s) == PR_STATE_WRITE_PROTOCOL_FREE)
  10
  11 /*===========================================================================*
  12  *                               sef_cb_lu_prepare                           *
  13  *===========================================================================*/
  14 int sef_cb_lu_prepare(int state)
  15 {
  16   int is_ready;
  17
  18   /* Check if we are ready for the target state. */
  19   is_ready = FALSE;
  20   switch(state) {
  21       /* Standard states. */
  22       case SEF_LU_STATE_REQUEST_FREE:
  23           is_ready = TRUE;
  24       break;
  25
  26       case SEF_LU_STATE_PROTOCOL_FREE:
  27           is_ready = (!writing && !is_status_msg_expected);
  28       break;
  29
  30       /* Custom states. */
  31       case PR_STATE_WRITE_PROTOCOL_FREE:
  32           is_ready = (!writing);
  33       break;
  34   }
  35
  36   /* Tell SEF if we are ready. */
  37   return is_ready ? OK : ENOTREADY;
  38 }
  39
  40 /*===========================================================================*
  41  *                        sef_cb_lu_state_isvalid                            *
  42  *===========================================================================*/
  43 int sef_cb_lu_state_isvalid(int state)
  44 {
  45   return SEF_LU_STATE_IS_STANDARD(state) || PR_STATE_IS_CUSTOM(state);
  46 }
  47
  48 /*===========================================================================*
  49  *                         sef_cb_lu_state_dump                              *
  50  *===========================================================================*/
  51 void sef_cb_lu_state_dump(int state)
  52 {
  53   sef_lu_dprint("printer: live update state = %d\n", state);
  54   sef_lu_dprint("printer: writing = %d\n", writing);
  55   sef_lu_dprint("printer: is_status_msg_expected = %d\n",
  56       is_status_msg_expected);
  57
  58   sef_lu_dprint("printer: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
  59       SEF_LU_STATE_WORK_FREE, TRUE);
  60   sef_lu_dprint("printer: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
  61       SEF_LU_STATE_REQUEST_FREE, TRUE);
  62   sef_lu_dprint("printer: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
  63       SEF_LU_STATE_PROTOCOL_FREE, (!writing && !is_status_msg_expected));
  64   sef_lu_dprint("printer: PR_STATE_WRITE_PROTOCOL_FREE(%d) reached = %d\n",
  65       PR_STATE_WRITE_PROTOCOL_FREE, (!writing));
  66 }
  67