minix/drivers/storage/at_wini/liveupdate.c

   1 #include "at_wini.h"
   2
   3 /* State management variables. */
   4 EXTERN int w_command;
   5
   6 /* State management helpers. */
   7 #define IS_REQUEST_PENDING(c)           ((c) != CMD_IDLE)
   8 #define IS_READ_PENDING(c)              ((c) == CMD_READ \
   9     || (c) == CMD_READ_EXT || (c) == CMD_READ_DMA || (c) == CMD_READ_DMA_EXT)
  10 #define IS_WRITE_PENDING(c)             ((c) == CMD_WRITE \
  11     || (c) == CMD_WRITE_EXT || (c) == CMD_WRITE_DMA || (c) == CMD_WRITE_DMA_EXT)
  12
  13 /* Custom states definition. */
  14 #define AT_STATE_READ_REQUEST_FREE      (SEF_LU_STATE_CUSTOM_BASE + 0)
  15 #define AT_STATE_WRITE_REQUEST_FREE     (SEF_LU_STATE_CUSTOM_BASE + 1)
  16 #define AT_STATE_IS_CUSTOM(s) \
  17     ((s) >= AT_STATE_READ_REQUEST_FREE && (s) <= AT_STATE_WRITE_REQUEST_FREE)
  18
  19 /*===========================================================================*
  20  *                               sef_cb_lu_prepare                           *
  21  *===========================================================================*/
  22 int sef_cb_lu_prepare(int state)
  23 {
  24   int is_ready;
  25
  26   /* Check if we are ready for the target state. */
  27   is_ready = FALSE;
  28   switch(state) {
  29       /* Standard states. */
  30       case SEF_LU_STATE_REQUEST_FREE:
  31       case SEF_LU_STATE_PROTOCOL_FREE:
  32           is_ready = (!IS_REQUEST_PENDING(w_command));
  33       break;
  34
  35       /* Custom states. */
  36       case AT_STATE_READ_REQUEST_FREE:
  37           is_ready = (!IS_READ_PENDING(w_command));
  38       break;
  39
  40       case AT_STATE_WRITE_REQUEST_FREE:
  41           is_ready = (!IS_WRITE_PENDING(w_command));
  42       break;
  43   }
  44
  45   /* Tell SEF if we are ready. */
  46   return is_ready ? OK : ENOTREADY;
  47 }
  48
  49 /*===========================================================================*
  50  *                        sef_cb_lu_state_isvalid                            *
  51  *===========================================================================*/
  52 int sef_cb_lu_state_isvalid(int state, int UNUSED(flags))
  53 {
  54   return SEF_LU_STATE_IS_STANDARD(state) || AT_STATE_IS_CUSTOM(state);
  55 }
  56
  57 /*===========================================================================*
  58  *                         sef_cb_lu_state_dump                              *
  59  *===========================================================================*/
  60 void sef_cb_lu_state_dump(int state)
  61 {
  62   sef_lu_dprint("at_wini: live update state = %d\n", state);
  63   sef_lu_dprint("at_wini: w_command = 0x%02X\n", w_command);
  64
  65   sef_lu_dprint("at_wini: SEF_LU_STATE_WORK_FREE(%d) reached = %d\n",
  66       SEF_LU_STATE_WORK_FREE, TRUE);
  67   sef_lu_dprint("at_wini: SEF_LU_STATE_REQUEST_FREE(%d) reached = %d\n",
  68       SEF_LU_STATE_REQUEST_FREE, (!IS_REQUEST_PENDING(w_command)));
  69   sef_lu_dprint("at_wini: SEF_LU_STATE_PROTOCOL_FREE(%d) reached = %d\n",
  70       SEF_LU_STATE_PROTOCOL_FREE, (!IS_REQUEST_PENDING(w_command)));
  71   sef_lu_dprint("at_wini: AT_STATE_READ_REQUEST_FREE(%d) reached = %d\n",
  72       AT_STATE_READ_REQUEST_FREE, (!IS_READ_PENDING(w_command)));
  73   sef_lu_dprint("at_wini: AT_STATE_WRITE_REQUEST_FREE(%d) reached = %d\n",
  74       AT_STATE_WRITE_REQUEST_FREE, (!IS_WRITE_PENDING(w_command)));
  75 }
  76