src/add-ons/kernel/debugger/laplinkll/laplinkll.h

   1 /*
   2  * Copyright 2008, Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              François Revol, revol@free.fr
   7  *
   8  * Copyright 2005, François Revol.
   9  */
  10
  11 /*
  12         Description: Implements a tty on top of the parallel port,
  13                                  using PLIP-like byte-by-byte protocol.
  14                                  Low level stuff.
  15 */
  16
  17
  18 // LPT1
  19 #define LPTBASE 0x378
  20 #define LPTIRQ 7
  21 #define LPTDONGLE "/dev/misc/dongle/parallel1"
  22 #define LPTSPIN 30
  23 #define LPTSOFTRIES 1000
  24 #define LPTNIBTRIES 100
  25 #define LAPLINK_MAX_FRAME 512
  26
  27 typedef struct laplink_state {
  28         int32 port;
  29         int32 irq;
  30
  31         uint8 rstate;
  32         uint8 wstate;
  33 } laplink_state;
  34
  35 // framing
  36 extern status_t ll_send_sof(laplink_state *st);
  37 extern status_t ll_check_sof(laplink_state *st);
  38 extern status_t ll_ack_sof(laplink_state *st);
  39 extern status_t ll_send_eof(laplink_state *st);
  40
  41 // nibbles
  42 extern status_t ll_send_lnibble(laplink_state *st, uint8 v);
  43 extern status_t ll_send_mnibble(laplink_state *st, uint8 v);
  44 extern status_t ll_wait_lnibble(laplink_state *st, uint8 *v);
  45 extern status_t ll_wait_mnibble(laplink_state *st, uint8 *v);
  46
  47 // byte mode
  48 extern status_t ll_send_byte(laplink_state *st, uint8 v);
  49 extern status_t ll_check_byte(laplink_state *st, uint8 *v);
  50 extern status_t ll_wait_byte(laplink_state *st, uint8 *v);
  51
  52 // frame mode
  53 extern status_t ll_send_frame(laplink_state *st, const uint8 *buff, size_t *len);
  54 extern status_t ll_check_frame(laplink_state *st, uint8 *buff, size_t *len);
  55 extern status_t ll_wait_frame(laplink_state *st, uint8 *buff, size_t *len);
  56
  57