drivers/printer/liveupdate.c

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