diff options
| -rw-r--r-- | sys/scsi/cd.c | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/sys/scsi/cd.c b/sys/scsi/cd.c index 47e7a0d..4e37fbb 100644 --- a/sys/scsi/cd.c +++ b/sys/scsi/cd.c @@ -14,7 +14,7 @@ * * Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992 * - * $Id: cd.c,v 1.57 1996/01/30 12:59:00 ache Exp $ + * $Id: cd.c,v 1.58 1996/01/30 14:30:43 ache Exp $ */ #include "opt_bounce.h" @@ -195,6 +195,15 @@ cd_registerdev(int unit) } } +static inline void lba2msf (int lba, u_char *m, u_char *s, u_char *f) +{ + lba += 150; /* offset of first logical frame */ + lba &= 0xffffff; /* negative lbas use only 24 bits */ + *m = lba / (60 * 75); + lba %= (60 * 75); + *s = lba / 75; + *f = lba % 75; +} /* * The routine called by the low level scsi routine when it discovers @@ -747,7 +756,7 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, (struct cd_toc_entry *)&th, sizeof th); if (error) break; - th.len = ((th.len & 0xff) << 8) + ((th.len >> 8) & 0xff); + NTOHS(th.len); bcopy(&th, addr, sizeof th); } break; @@ -760,7 +769,7 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, struct ioc_read_toc_entry *te = (struct ioc_read_toc_entry *) addr; struct ioc_toc_header *th; - u_int32 len, readlen, idx; + u_int32 len, readlen, idx, num; u_int32 starting_track = te->starting_track; if ( te->data_len < sizeof(struct cd_toc_entry) @@ -771,11 +780,14 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, error = EINVAL; break; } + th = &data.header; error = cd_read_toc(unit, 0, 0, - (struct cd_toc_entry *)th, sizeof *th); + (struct cd_toc_entry *)th, sizeof (*th)); if (error) break; + NTOHS(th->len); + if (starting_track == 0) starting_track = th->starting_track; else if (starting_track == 170) @@ -785,6 +797,7 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, error = EINVAL; break; } + len = ((th->ending_track + 1 - starting_track) + 1) * sizeof(struct cd_toc_entry); if (te->data_len < len) @@ -793,6 +806,7 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, error = EINVAL; break; } + num = len / sizeof(struct cd_toc_entry); /* calculate reading length without leadout entry */ readlen = ((int)th->ending_track - starting_track) + 1; @@ -804,14 +818,13 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, error = cd_read_toc(unit, te->address_format, starting_track, - (struct cd_toc_entry *)&data, - readlen + sizeof(struct ioc_toc_header)); + data.entries, + readlen); if (error) break; - th->len = ((th->len & 0xff) << 8) + ((th->len >> 8) & 0xff); /* make fake leadout entry if needed */ - idx = starting_track + len / sizeof(struct cd_toc_entry) - 1; + idx = starting_track + num - 1; if (idx == th->ending_track + 1) { idx -= starting_track; /* now offset in the entries */ if (idx > 0) { @@ -819,7 +832,22 @@ cd_ioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p, data.entries[idx].addr_type = data.entries[idx-1].addr_type; } data.entries[idx].track = 170; /* magic */ - data.entries[idx].addr.lba = th->len; + switch (te->address_format) { + case CD_MSF_FORMAT: + lba2msf (th->len, + &data.entries[idx].addr.msf.minute, + &data.entries[idx].addr.msf.second, + &data.entries[idx].addr.msf.frame); + break; + case CD_LBA_FORMAT: + data.entries[idx].addr.lba = htonl(th->len); + break; + } + } + + if (te->address_format == CD_LBA_FORMAT) { + for (idx = 0; idx < num; idx++) + NTOHL(data.entries[idx].addr.lba); } error = copyout(data.entries, te->data, len); |
