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/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: dtop.h
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 1/92
*
* Definitions for the Desktop serial bus (i2c aka ACCESS).
*/
#ifndef _DTOP_H_
#define _DTOP_H_
#define DTOP_MAX_DEVICES 14
#define DTOP_MAX_MSG_SIZE 36 /* 3 hdr + 32 data + 1 checksum */
typedef struct {
unsigned char dest_address; /* low bit is zero */
unsigned char src_address; /* ditto */
union {
struct {
unsigned char len : 5, /* message byte len */
sub : 2, /* sub-address */
P : 1; /* Control(1)/Data(0) marker */
} val;
unsigned char bits; /* quick check */
} code;
/* varzise, checksum byte at end */
unsigned char body[DTOP_MAX_MSG_SIZE-3];
} dtop_message, *dtop_message_t;
/*
* Standard addresses
*/
#define DTOP_ADDR_HOST 0x50 /* address for the (only) host */
#define DTOP_ADDR_DEFAULT 0x6e /* power-up default address */
#define DTOP_ADDR_FIRST 0x52 /* first assignable address */
#define DTOP_ADDR_LAST 0x6c /* last, inclusive */
#define DTOP_ADDR_KBD 0x6c /* as used by DEC */
#define DTOP_ADDR_MOUSE 0x6a
/*
* Standard messages
*/
/* from host to devices */
#define DTOP_MSG_RESET 0xf0 /* preceeded by 0x81: P,len 1 */
#define DTOP_MSG_ID_REQUEST 0xf1 /* preceeded by 0x81: P,len 1 */
#define DTOP_MSG_ASSIGN_ADDRESS 0xf2 /* preceeded by 0x9e: P,len 30 */
/* followed by a dtop_id_reply_t */
/* and by the new_IC_address */
#define DTOP_MSG_CAP_REQUEST 0xf3 /* preceeded by 0x83: P,len 3 */
/* followed by a 16 bit u_offset */
#define DTOP_MSG_APPL_TEST 0xb1 /* preceed by P, sub, len 1 */
/* from devices to host */
#define DTOP_MSG_ATTENTION 0xe0 /* preceeded by P, len */
# define DTOP_ATN_OK_STATUS 0x00 /* anything else bad */
/* followed by 0-30 bytes */
#define DTOP_MSG_ID_REPLY 0xe1 /* preceeded by P,len (29..32) */
typedef struct {
unsigned char module_revision[8]; /* ascii, blank padded */
unsigned char vendor_name[8];
unsigned char module_name[8];
int device_number; /* 32 bits cpl-2 */
/* 0-3 optional bytes follow, ignore */
} dtop_id_reply_t;
#define DTOP_MSG_CAP_REPLY 0xe3 /* preceeded by P,len (3..32) */
/* followed by 16 bit u_offset */
/* followed by data */
#define DTOP_MSG_APPL_SIGNAL 0xa0 /* application level signal */
# define DTOP_SIG_ATTENTION 0x00
# define DTOP_SIG_RESET 0x01
# define DTOP_SIG_HALT 0x02
#define DTOP_MSG_APPL_TREPLY 0xa1 /* followed by status (0-->ok) */
/* and 0..30 bytes of result data */
/* reserved message codes (testing, manifacturing) */
#define DTOP_MSG_RES0 0xc0
#define DTOP_MSG_RES1 0xc1
#define DTOP_MSG_RES2 0xc2
#define DTOP_MSG_RES3 0xc3
/*
* Device specific definitions: Keyboard
*/
/* from host to keyboard */
#define DTOP_KMSG_CLICK 0x01 /* preceeded by P, sub len 2 */
# define DTOP_CLICK_VOLUME_MAX 0x7 /* followed by one byte */
#define DTOP_KMSG_BELL 0x02 /* preceeded by P, sub len 2 */
/* same as above */
#define DTOP_KMSG_LED 0x03 /* preceeded by P, sub len 2 */
/* four lower bits turn leds on */
#define DTOP_KMSG_POLL 0x04 /* preceeded by P, sub len 1 */
/* keyboard sends up to 11 codes in a data message, distinguished values: */
#define DTOP_KBD_EMPTY 0x00
#define DTOP_KBD_OUT_ERR 0x01
#define DTOP_KBD_IN_ERR 0x02
#define DTOP_KBD_KEY_MIN 0x08
#define DTOP_KBD_KEY_MAX 0xff
/* powerup status values: 0 ok, else.. */
#define DTOP_KBD_ROM_FAIL 0x01
#define DTOP_KBD_RAM_FAIL 0x02
#define DTOP_KBD_KEY_DOWN 0x03
/*
* Device specific definitions: Locators (mouse)
*/
/* locator sends this type of report data */
typedef struct {
unsigned short buttons; /* 1->pressed */
short x;
short y;
short z;
/* possibly 3 more dimensions for gloves */
} dtop_locator_msg_t;
#define DTOP_LMSG_SET_RATE 0x01 /* preceeded by P,sub, len 2 */
/* followed by sampling interval,
from 8 to 25 msecs (0->polled */
#define DTOP_LMSG_POLL 0x02 /* preceeded by P,sub, len 1 */
/* Powerup codes same as keyboard */
/*
* Implementation specific definitions
*/
typedef union {
dtop_message unknown_report;
struct {
char last_codes_count;
unsigned char last_codes[11]; /* max as per specs */
unsigned int last_msec; /* autorepeat state */
unsigned short poll_frequency;
unsigned char k_ar_state;
# define K_AR_IDLE 0 /* quiescent, no polling */
# define K_AR_OFF 4 /* turn off polling pls */
# define K_AR_ACTIVE 2 /* polling, no autos yet */
# define K_AR_TRIGGER 1 /* sent one autorepeat */
unsigned char bell_volume;
unsigned char led_status;
} keyboard;
struct {
unsigned char type : 7, /* DEV_MOUSE, DEV_TABLET, .. */
relative : 1;
unsigned char n_coords;
unsigned short prev_buttons;
# define L_BUTTON_MAX 16
unsigned char button_code[L_BUTTON_MAX];
# define L_COORD_MAX 6
unsigned int coordinate[L_COORD_MAX]; /* max 6D */
} locator;
/* add more as they come along */
} dtop_device, *dtop_device_t;
/* All handler functions should have this interface */
extern int
dtop_null_device_handler(
dtop_device_t dev,
dtop_message_t msg,
int event,
unsigned char outc),
dtop_locator_handler(
dtop_device_t dev,
dtop_message_t msg,
int event,
unsigned char outc),
dtop_keyboard_handler(
dtop_device_t dev,
dtop_message_t msg,
int event,
unsigned char outc);
#define DTOP_EVENT_RECEIVE_PACKET 1
#define DTOP_EVENT_BAD_PACKET 2
#define DTOP_EVENT_PUTC 4
#define DTOP_EVENT_POLL 8
#endif /* _DTOP_H_ */
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