--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cdrom/bsdi/SDL_syscdrom.c	Thu Sep 13 15:57:48 2001 +0000
@@ -0,0 +1,547 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@devolution.com
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/*
+ * Functions for system-level CD-ROM audio control for BSD/OS 4.x
+ * This started life out as a copy of the freebsd/SDL_cdrom.c file but was
+ * heavily modified.   Works for standard (MMC) SCSI and ATAPI CDrom drives.
+ *
+ * Steven Schultz - sms@to.gd-es.com
+*/
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <err.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include </sys/dev/scsi/scsi.h>
+#include </sys/dev/scsi/scsi_ioctl.h>
+
+#include "SDL_error.h"
+#include "SDL_cdrom.h"
+#include "SDL_syscdrom.h"
+
+/*
+ * The msf_to_frame and frame_to_msf were yanked from libcdrom and inlined
+ * here so that -lcdrom doesn't have to be dragged in for something so simple.
+*/
+
+#define	FRAMES_PER_SECOND	75
+#define	FRAMES_PER_MINUTE	(FRAMES_PER_SECOND * 60)
+
+int
+msf_to_frame(int minute, int second, int frame)
+	{
+	return(minute * FRAMES_PER_MINUTE + second * FRAMES_PER_SECOND + frame);
+	}
+
+void
+frame_to_msf(int frame, int *minp, int *secp, int *framep)
+	{
+	*minp = frame / FRAMES_PER_MINUTE;
+	*secp = (frame % FRAMES_PER_MINUTE) / FRAMES_PER_SECOND;
+	*framep = frame % FRAMES_PER_SECOND;
+	}
+
+/* The maximum number of CD-ROM drives we'll detect */
+#define MAX_DRIVES	16	
+
+/* A list of available CD-ROM drives */
+static char *SDL_cdlist[MAX_DRIVES];
+static dev_t SDL_cdmode[MAX_DRIVES];
+
+/* The system-dependent CD control functions */
+static const char *SDL_SYS_CDName(int drive);
+static int SDL_SYS_CDOpen(int drive);
+static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
+static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
+static int SDL_SYS_CDPause(SDL_CD *cdrom);
+static int SDL_SYS_CDResume(SDL_CD *cdrom);
+static int SDL_SYS_CDStop(SDL_CD *cdrom);
+static int SDL_SYS_CDEject(SDL_CD *cdrom);
+static void SDL_SYS_CDClose(SDL_CD *cdrom);
+
+typedef	struct	scsi_cdb cdb_t;
+
+static int scsi_cmd(int fd,
+		struct scsi_cdb *cdb,
+		int cdblen, 
+		int rw,
+		caddr_t data,
+		int datalen,
+		struct scsi_user_cdb *sus)
+	{
+	int	scsistatus;
+	unsigned char	*cp;
+	struct	scsi_user_cdb suc;
+
+    /* safety checks */
+	if	(!cdb) return(-1);
+	if	(rw != SUC_READ && rw != SUC_WRITE) return(-1);
+
+	suc.suc_flags = rw;
+	suc.suc_cdblen = cdblen;
+	bcopy(cdb, suc.suc_cdb, cdblen);
+	suc.suc_datalen = datalen;
+	suc.suc_data = data;
+	suc.suc_timeout = 10;		/* 10 secs max for TUR or SENSE */
+	if	(ioctl(fd, SCSIRAWCDB, &suc) == -1)
+		return(-11);
+	scsistatus = suc.suc_sus.sus_status;
+	cp = suc.suc_sus.sus_sense;
+
+/*
+ * If a place to copy the sense data back to has been provided then the
+ * caller is responsible for checking the errors and printing any information
+ * out if the status was not successful.
+*/
+	if	(scsistatus != 0 && !sus)
+		{
+		fprintf(stderr,"scsistatus = %x cmd = %x\n",
+			scsistatus, cdb[0]);
+		fprintf(stderr, "sense %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x\n", 
+			cp[0], cp[1], cp[2], cp[3], cp[4], cp[5],
+			cp[6], cp[7], cp[8], cp[9], cp[10], cp[11],
+			cp[12], cp[13], cp[14], cp[15]);
+		return(1);
+		}
+	if	(sus)
+		bcopy(&suc, sus, sizeof (struct scsi_user_cdb));
+	if	(scsistatus)
+		return(1);	/* Return non-zero for unsuccessful status */
+	return(0);
+	}
+
+/* request vendor brand and model */
+unsigned char *Inquiry(int fd)
+	{
+	static struct scsi_cdb6 cdb = 
+		{
+		0x12, 
+		0, 0, 0,
+		56,
+		0
+		};
+	static unsigned char Inqbuffer[56];
+
+	if	(scsi_cmd(fd, (cdb_t *)&cdb, 6, SUC_READ, Inqbuffer, 
+			sizeof(Inqbuffer), 0))
+		return("\377");
+	return(Inqbuffer);
+	}
+
+#define ADD_SENSECODE 12
+#define ADD_SC_QUALIFIER 13
+
+int TestForMedium(int fd)
+	{
+	int	sts, asc, ascq;
+	struct	scsi_user_cdb sus;
+	static struct scsi_cdb6 cdb =
+		{
+		CMD_TEST_UNIT_READY, /* command */
+		0,	/* reserved */
+		0,	/* reserved */
+		0,	/* reserved */
+		0,	/* reserved */
+		0	/* reserved */
+		};
+
+again:	sts = scsi_cmd(fd, (cdb_t *)&cdb, 6, SUC_READ, 0, 0, &sus);
+	asc = sus.suc_sus.sus_sense[ADD_SENSECODE];
+	ascq = sus.suc_sus.sus_sense[ADD_SC_QUALIFIER];
+	if	(asc == 0x3a && ascq == 0x0)	/* no medium */
+		return(0);
+	if	(asc == 0x28 && ascq == 0x0)	/* medium changed */
+		goto again;
+	if	(asc == 0x4 && ascq == 0x1 )	/* coming ready */
+		{
+		sleep(2);
+		goto again;
+		}
+	return(1);
+	}
+
+/* Check a drive to see if it is a CD-ROM */
+static int CheckDrive(char *drive, struct stat *stbuf)
+{
+	int is_cd = 0, cdfd;
+	char *p;
+
+	/* If it doesn't exist, return -1 */
+	if ( stat(drive, stbuf) < 0 ) {
+		return(-1);
+	}
+
+	/* If it does exist, verify that it's an available CD-ROM */
+	cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0);
+	if ( cdfd >= 0 ) {
+		p = Inquiry(cdfd);
+		if (*p == TYPE_ROM)
+			is_cd = 1;
+		close(cdfd);
+	}
+	return(is_cd);
+}
+
+/* Add a CD-ROM drive to our list of valid drives */
+static void AddDrive(char *drive, struct stat *stbuf)
+{
+	int i;
+
+	if ( SDL_numcds < MAX_DRIVES ) {
+		/* Check to make sure it's not already in our list.
+	 	   This can happen when we see a drive via symbolic link.
+		 */
+		for ( i=0; i<SDL_numcds; ++i ) {
+			if ( stbuf->st_rdev == SDL_cdmode[i] ) {
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
+#endif
+				return;
+			}
+		}
+
+		/* Add this drive to our list */
+		i = SDL_numcds;
+		SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
+		if ( SDL_cdlist[i] == NULL ) {
+			SDL_OutOfMemory();
+			return;
+		}
+		strcpy(SDL_cdlist[i], drive);
+		SDL_cdmode[i] = stbuf->st_rdev;
+		++SDL_numcds;
+#ifdef DEBUG_CDROM
+  fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
+#endif
+	}
+}
+
+int  SDL_SYS_CDInit(void)
+{
+	/* checklist: /dev/rsr?c */
+	static char *checklist[] = {
+	"?0 rsr?", NULL
+	};
+	char *SDLcdrom;
+	int i, j, exists;
+	char drive[32];
+	struct stat stbuf;
+
+	/* Fill in our driver capabilities */
+	SDL_CDcaps.Name = SDL_SYS_CDName;
+	SDL_CDcaps.Open = SDL_SYS_CDOpen;
+	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
+	SDL_CDcaps.Status = SDL_SYS_CDStatus;
+	SDL_CDcaps.Play = SDL_SYS_CDPlay;
+	SDL_CDcaps.Pause = SDL_SYS_CDPause;
+	SDL_CDcaps.Resume = SDL_SYS_CDResume;
+	SDL_CDcaps.Stop = SDL_SYS_CDStop;
+	SDL_CDcaps.Eject = SDL_SYS_CDEject;
+	SDL_CDcaps.Close = SDL_SYS_CDClose;
+
+	/* Look in the environment for our CD-ROM drive list */
+	SDLcdrom = getenv("SDL_CDROM");	/* ':' separated list of devices */
+	if ( SDLcdrom != NULL ) {
+		char *cdpath, *delim;
+		cdpath = malloc(strlen(SDLcdrom)+1);
+		if ( cdpath != NULL ) {
+			strcpy(cdpath, SDLcdrom);
+			SDLcdrom = cdpath;
+			do {
+				delim = strchr(SDLcdrom, ':');
+				if ( delim ) {
+					*delim++ = '\0';
+				}
+				if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
+					AddDrive(SDLcdrom, &stbuf);
+				}
+				if ( delim ) {
+					SDLcdrom = delim;
+				} else {
+					SDLcdrom = NULL;
+				}
+			} while ( SDLcdrom );
+			free(cdpath);
+		}
+
+		/* If we found our drives, there's nothing left to do */
+		if ( SDL_numcds > 0 ) {
+			return(0);
+		}
+	}
+
+	/* Scan the system for CD-ROM drives */
+	for ( i=0; checklist[i]; ++i ) {
+		if ( checklist[i][0] == '?' ) {
+			char *insert;
+			exists = 1;
+			for ( j=checklist[i][1]; exists; ++j ) {
+				sprintf(drive, "/dev/%sc", &checklist[i][3]);
+				insert = strchr(drive, '?');
+				if ( insert != NULL ) {
+					*insert = j;
+				}
+				switch (CheckDrive(drive, &stbuf)) {
+					/* Drive exists and is a CD-ROM */
+					case 1:
+						AddDrive(drive, &stbuf);
+						break;
+					/* Drive exists, but isn't a CD-ROM */
+					case 0:
+						break;
+					/* Drive doesn't exist */
+					case -1:
+						exists = 0;
+						break;
+				}
+			}
+		} else {
+			sprintf(drive, "/dev/%s", checklist[i]);
+			if ( CheckDrive(drive, &stbuf) > 0 ) {
+				AddDrive(drive, &stbuf);
+			}
+		}
+	}
+	return(0);
+}
+
+static const char *SDL_SYS_CDName(int drive)
+{
+	return(SDL_cdlist[drive]);
+}
+
+static int SDL_SYS_CDOpen(int drive)
+{
+	return(open(SDL_cdlist[drive], O_RDONLY | O_NONBLOCK | O_EXCL, 0));
+}
+
+static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
+	{
+	u_char cdb[10], buf[4], *p, *toc;
+	struct scsi_user_cdb sus;
+	int i, sts, first_track, last_track, ntracks, toc_size;
+
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x43;		/* Read TOC */
+	cdb[1] = 0x2;		/* MSF */
+	cdb[8] = 4;		/* size TOC header */
+	sts = scsi_cmd(cdrom->id, (cdb_t *)cdb, 10, SUC_READ, buf, 4, &sus);
+	if	(sts < 0)
+		return(-1);
+	first_track = buf[2];
+	last_track = buf[3];
+	ntracks = last_track - first_track + 1;
+	cdrom->numtracks = ntracks;
+	toc_size = 4 + (ntracks + 1) * 8;
+	toc = (u_char *)malloc(toc_size);
+	if	(toc == NULL)
+		return(-1);
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x43;
+	cdb[1] = 0x2;
+	cdb[6] = first_track;
+	cdb[7] = toc_size >> 8;
+	cdb[8] = toc_size & 0xff;
+	sts = scsi_cmd(cdrom->id, (cdb_t *)cdb, 10, SUC_READ, toc, toc_size, 
+			&sus);
+	if	(sts < 0)
+		{
+		free(toc);
+		return(-1);
+		}
+
+	for	(i = 0, p = toc+4; i <= ntracks; i++, p+= 8)
+		{
+		if	(i == ntracks)
+			cdrom->track[i].id = 0xAA;	/* Leadout */
+		else
+			cdrom->track[i].id = first_track + i;
+		if	(p[1] & 0x20)
+			cdrom->track[i].type = SDL_DATA_TRACK;
+		else
+			cdrom->track[i].type = SDL_AUDIO_TRACK;
+		cdrom->track[i].offset = msf_to_frame(p[5], p[6], p[7]);
+		cdrom->track[i].length = 0;
+		if	(i > 0)
+			cdrom->track[i-1].length = cdrom->track[i].offset -
+						   cdrom->track[i-1].offset;
+		}
+	free(toc);
+	return(0);
+	}
+
+/* Get CD-ROM status */
+static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
+	{
+	CDstatus status;
+	u_char	cdb[10], buf[16];
+	int	sts;
+	struct	scsi_user_cdb sus;
+
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x42;		/* read subq */
+	cdb[1] = 0x2;		/* MSF */
+	cdb[2] = 0x40;		/* q channel */
+	cdb[3] = 1;		/* current pos */
+	cdb[7] = sizeof (buf) >> 8;
+	cdb[8] = sizeof (buf) & 0xff;
+	sts = scsi_cmd(cdrom->id, (cdb_t *)cdb, 10, SUC_READ, buf, sizeof (buf),
+			&sus);
+	if	(sts < 0)
+		return(-1);
+	if	(sts)
+		{
+		if	(TestForMedium(cdrom->id) == 0)
+			status = CD_TRAYEMPTY;
+		else
+			status = CD_ERROR;
+		}
+	else
+		{
+		switch	(buf[1])
+			{
+			case	0x11:
+				status = CD_PLAYING;
+				break;
+			case	0x12:
+				status = CD_PAUSED;
+				break;
+			case	0x13:
+			case	0x14:
+			case	0x15:
+				status = CD_STOPPED;
+				break;
+			default:
+				status = CD_ERROR;
+				break;
+			}
+		}
+	if	(position)
+		{
+		if	( status == CD_PLAYING || (status == CD_PAUSED) )
+			*position = msf_to_frame(buf[9], buf[10], buf[11]);
+		else
+			*position = 0;
+		}
+	return(status);
+	}
+
+/* Start play */
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
+	{
+	u_char	cdb[10];
+	int	sts, minute, second, frame, eminute, esecond, eframe;
+	struct	scsi_user_cdb sus;
+
+	bzero(cdb, sizeof(cdb));
+	cdb[0] = 0x47;		/* Play */
+	frame_to_msf(start, &minute, &second, &frame);
+	frame_to_msf(start + length, &eminute, &esecond, &eframe);
+	cdb[3] = minute;
+	cdb[4] = second;
+	cdb[5] = frame;
+	cdb[6] = eminute;
+	cdb[7] = esecond;
+	cdb[8] = eframe;
+	sts = scsi_cmd(cdrom->id, (cdb_t *)cdb, 10, SUC_READ, 0, 0, &sus);
+	return(sts);
+	}
+
+static	int
+pauseresume(SDL_CD *cdrom, int flag)
+	{
+	u_char	cdb[10];
+	struct	scsi_user_cdb sus;
+
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x4b;
+	cdb[8] = flag & 0x1;
+	return(scsi_cmd(cdrom->id, (cdb_t *)cdb, 10, SUC_READ, 0, 0, &sus));
+	}
+
+/* Pause play */
+static int SDL_SYS_CDPause(SDL_CD *cdrom)
+{
+	return(pauseresume(cdrom, 0));
+}
+
+/* Resume play */
+static int SDL_SYS_CDResume(SDL_CD *cdrom)
+{
+	return(pauseresume(cdrom, 1));
+}
+
+/* Stop play */
+static int SDL_SYS_CDStop(SDL_CD *cdrom)
+{
+	u_char cdb[6];
+	struct	scsi_user_cdb sus;
+
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x1b;		/* stop */
+	cdb[1] = 1;		/* immediate */
+	return(scsi_cmd(cdrom->id, (cdb_t *)cdb, 6, SUC_READ, 0, 0, &sus));
+}
+
+/* Eject the CD-ROM */
+static int SDL_SYS_CDEject(SDL_CD *cdrom)
+{
+	u_char cdb[6];
+	struct	scsi_user_cdb sus;
+
+	bzero(cdb, sizeof (cdb));
+	cdb[0] = 0x1b;		/* stop */
+	cdb[1] = 1;		/* immediate */
+	cdb[4] = 2;		/* eject */
+	return(scsi_cmd(cdrom->id, (cdb_t *)cdb, 6, SUC_READ, 0, 0, &sus));
+}
+
+/* Close the CD-ROM handle */
+static void SDL_SYS_CDClose(SDL_CD *cdrom)
+	{
+	close(cdrom->id);
+	}
+
+void SDL_SYS_CDQuit(void)
+{
+	int i;
+
+	if ( SDL_numcds > 0 ) {
+		for ( i=0; i<SDL_numcds; ++i ) {
+			free(SDL_cdlist[i]);
+			}
+		}
+	SDL_numcds = 0;
+}