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m68k-bdm/m68k/driver/win/win-bdm.c
Bernd Mueller adfd70813f initial push
2026-06-17 13:44:30 +02:00

536 lines
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/*
* Motorola Background Debug Mode Driver
* Copyright (C) 1998-2007 Chris Johns
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Windows support by:
* Chris Johns
* Contemporary Software
* chris@contemporary.net.au
*
* Michael Cooper
* Integrated Chipware
* 1861 Wiehle Ave.
* Reston, Virginia 20190, USA
* mikec@chipware.com
*
* Rick Haubenstricker
* Perceptron, Inc
* 47827 Halyard Dr
* Plymouth, Michigan 48170, USA
* rickh@perceptron.com
*
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <windows.h>
#include <win/win-io.h>
#define BDM_DEFAULT_DEBUG 0
static int debugLevel = BDM_DEFAULT_DEBUG;
/*
************************************************************************
* Override the C library function. *
************************************************************************
*/
int
win32_remote_close (int fd)
{
return close (fd);
}
int
win32_remote_read (int fd, char *buf, size_t count)
{
return read (fd, buf, count);
}
int
win32_remote_write (int fd, char *buf, size_t count)
{
return write (fd, buf, count);
}
int
stat (const char *file_name, struct stat *buf)
{
if (strncmp (file_name, "/dev/bdm", sizeof ("/dev/bdm") - 1) == 0 )
{
return 0 ;
}
else /* Check for real file */
{
int fd = open(file_name,O_RDONLY);
if ( fd > 0 )
{
int status = fstat(fd, buf);
close(fd);
return status;
}
else
{
return fd;
}
}
}
#define open win_bdm_open
#define close win_bdm_close
#define ioctl win_bdm_ioctl
#define read win_bdm_read
#define write win_bdm_write
/*
************************************************************************
* Windows driver support routines *
************************************************************************
*/
#define udelay usleep
#if !defined (__CYGWIN__)
#ifndef HZ
#define HZ 100
#endif
void
usleep(int usecs)
{
LARGE_INTEGER lpc;
LONGLONG lpc2;
LONGLONG current_usecs;
LONGLONG final_usecs;
static int first_time = 1;
static LARGE_INTEGER lpf;
static LONGLONG lpf2;
/*
* First time through, get frequency of high-resolution
* performance counter (value is counts per second)
*/
if (first_time) {
QueryPerformanceFrequency (&lpf);
lpf2 = *(LONGLONG *) &lpf;
first_time = 0;
}
/*
* Get current value of high-resolution performance counter
* (value in counts)
*/
QueryPerformanceCounter (&lpc);
lpc2 = *(LONGLONG *)&lpc;
/*
* Calculate desired final time in usecs
*/
final_usecs = ((lpc2 * (LONGLONG) 1000000) / lpf2) + (LONGLONG) usecs;
/*
* Loop until current count when converted to usecs is greater
* than final time
*/
do {
/*
* Get current value of high-resolution performance
* counter (value in counts)
*/
QueryPerformanceCounter (&lpc);
lpc2 = *(LONGLONG *) &lpc;
/*
* Calculate current time in usecs
*/
current_usecs = (lpc2 * (LONGLONG) 1000000 / lpf2);
}
while (current_usecs < final_usecs);
}
#endif
/*
* Delay for a while so target can keep up.
*/
void
bdm_delay (int counter)
{
while (counter--) {
#if defined (__GNUC__)
asm volatile ("nop");
#else
__asm nop
#endif
}
}
/*
* Delay specified number of milliseconds
*/
void
bdm_sleep (unsigned long time)
{
usleep (time * (1000 * (100 / HZ)));
}
/*
************************************************************************
* OS worker functions. *
************************************************************************
*/
int
os_claim_io_ports (char *name, unsigned int base, unsigned int num)
{
/*
* FIXME: Not sure what happens here. Dos Win9x how someelse has
* port through some sort of virtual device driver thingy ?
*/
return 0;
}
int
os_release_io_ports (unsigned int base, unsigned int num)
{
/*
* FIXME: See comment above.
*/
return 0;
}
#define os_move_in os_copy_in
int
os_copy_in (void *dst, void *src, int size)
{
/*
* We run in the application and talk directly to the hardware.
*/
memcpy (dst, src, size);
return 0;
}
#define os_move_out os_copy_out
int
os_copy_out (void *dst, void *src, int size)
{
memcpy (dst, src, size);
return 0;
}
void
os_lock_module ()
{
}
void
os_unlock_module ()
{
}
#ifdef interface
#undef interface
#endif
/*
************************************************************************
* Include the driver code *
************************************************************************
*/
#include "bdm.c"
/*
************************************************************************
* Good old-fashioned UNIX driver entry points *
************************************************************************
*/
static int bdm_dev_registered = 0;
/*
* Unhook module from kernel
*/
static void bdm_cleanup_module (void)
{
if (bdm_dev_registered) {
bdm_dev_registered = 0;
fprintf (stderr, "BDM driver unregistered.\n");
}
}
/*
* Basically just detect the port.
*/
int
win_bdm_init ()
{
int minor;
HANDLE h;
OSVERSIONINFO osvi;
BOOL bOsVersionInfoEx;
if (bdm_dev_registered)
return 0;
/*
* Determine which operating system in use, if NT or 2000,
* we need to enable the port.
*/
ZeroMemory (&osvi, sizeof(OSVERSIONINFO));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (!(bOsVersionInfoEx = GetVersionEx ((LPOSVERSIONINFO) &osvi))) {
/*
* If OSVERSIONINFOEX doesn't work, try OSVERSIONINFO.
*/
osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);
if (! GetVersionEx ((OSVERSIONINFO *) &osvi)) {
fprintf (stderr, "error: unsupported Windows version.\n");
errno = EIO;
return -1;
}
}
if (osvi.dwPlatformId == VER_PLATFORM_WIN32_NT) {
/*
* Open access to parallel port using giveio
*/
h = CreateFile ("\\\\.\\giveio", GENERIC_READ, 0, NULL,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (h == INVALID_HANDLE_VALUE) {
fprintf (stderr, "error: could not access the GiveIO device.\n");
errno = EIO;
return -1;
}
CloseHandle (h);
}
#ifdef BDM_VER_MESSAGE
fprintf (stderr, "bdm_init %d.%d, " __DATE__ ", " __TIME__ "\n",
BDM_DRV_VERSION >> 8, BDM_DRV_VERSION & 0xff);
#endif
/*
* Set up port numbers
*/
for (minor = 0 ;
minor < (sizeof(bdm_device_info) / sizeof(bdm_device_info[0])) ;
minor++) {
unsigned short port;
struct BDM *self = &bdm_device_info[minor];
/*
* First set the default debug level.
*/
self->debugFlag = BDM_DEFAULT_DEBUG;
/*
* Choose a port number
*/
switch (BDM_IFACE_MINOR (minor)) {
case 0: port = 0x378; break; /* LPT1 */
case 1: port = 0x278; break; /* LPT2 */
case 2: port = 0x3bc; break; /* LPT3 */
case 3: port = 0x2bc; break; /* LPT4, ccj - made this up :-) */
default:
fprintf (stderr, "BDM driver has no address for LPT%d.\n",
BDM_IFACE_MINOR (minor) + 1);
bdm_cleanup_module();
errno = EIO;
return -1;
}
/*
* See if the port exists
*/
self->exists = 1;
outb (0x00, port);
udelay (50);
if (inb (port) != 0x00) {
self->exists = 0;
if (self->debugFlag)
fprintf (stderr, "BDM driver cannot detect LPT%d.\n",
BDM_IFACE_MINOR (minor) + 1);
continue;
}
sprintf (self->name, "bdm%d", minor);
self->portBase = self->dataPort = port;
self->statusPort = port + 1;
self->controlPort = port + 2;
self->delayTimer = 0;
switch (BDM_IFACE (minor)) {
case BDM_CPU32_PD: cpu32_pd_init_self (self); break;
case BDM_CPU32_ICD: cpu32_icd_init_self (self); break;
case BDM_COLDFIRE_PE: cf_pe_init_self (self); break;
case BDM_COLDFIRE_TBLCF: break;
default:
fprintf (stderr, "BDM driver has no interface for minor number\n");
bdm_cleanup_module();
errno = EIO;
return -1;
}
}
bdm_dev_registered = 1;
return 0;
}
/*
* The device is a device name of the form /dev/bdmcpu320 or
* /dev/bdmcf0 where the /dev/bdm must be present
* the next field can be cpu32 or cf followed by
* a number which is the port.
*/
int
win_bdm_open (const char *device, int flags, ...)
{
int port = 0;
if (strncmp (device, "/dev/bdm", sizeof ("/dev/bdm") - 1) == 0)
{
if (win_bdm_init () < 0)
return -1;
device += sizeof ("/dev/bdm") - 1;
if (strncmp (device, "cpu32", 5) == 0)
{
port = 0;
device += 5; /* s.b. 5 */
}
/* Allow ICD access under cygwin */
else if (strncmp (device, "icd", 3) == 0)
{
port = 8;
device += 3;
}
else if (strncmp (device, "cf", 2) == 0)
{
port = 4;
device += 2;
}
else
{
errno = ENOENT;
return -1;
}
port += strtoul (device, 0, 0);
}
else
{
if (usb_bdm_init (device) < 0)
return -1;
}
errno = bdm_open (port);
if (errno)
return -1;
return port;
}
int
win_bdm_close (int fd)
{
bdm_close (fd);
return 0;
}
unsigned long
win_bdm_read (int fd, char *buf, unsigned long count)
{
errno = bdm_read (fd, buf, count);
if (errno)
return -1;
return count;
}
unsigned long
win_bdm_write (int fd, char *buf, unsigned long count)
{
errno = bdm_write (fd, buf, count);
if (errno)
return -1;
return count;
}
int
win_bdm_ioctl (int fd, unsigned int cmd, ...)
{
va_list args;
unsigned long *arg;
int iarg;
int err = 0;
va_start (args, cmd);
arg = va_arg (args, unsigned long *);
/*
* Pick up the argument
*/
if (!bdm_dev_registered) {
switch (cmd) {
case BDM_DEBUG:
err = os_copy_in ((void*) &iarg, (void*) arg, sizeof iarg);
break;
}
if (err)
return err;
if (debugLevel > 3)
fprintf (stderr, "win_bdm_ioctl cmd:0x%08x\n", cmd);
switch (cmd) {
case BDM_DEBUG:
debugLevel = iarg;
break;
}
}
errno = bdm_ioctl (fd, cmd, (unsigned long) arg);
if (errno)
return -1;
return 0;
}
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