diff options
Diffstat (limited to 'drivers/block/floppy.c')
| -rw-r--r-- | drivers/block/floppy.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index 395f8ea..cf64ddf 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -423,8 +423,15 @@ static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical * side 0 is on physical side 0 (but with the misnamed sector IDs). * 'stretch' should probably be renamed to something more general, like - * 'options'. Other parameters should be self-explanatory (see also - * setfdprm(8)). + * 'options'. + * + * Bits 2 through 9 of 'stretch' tell the number of the first sector. + * The LSB (bit 2) is flipped. For most disks, the first sector + * is 1 (represented by 0x00<<2). For some CP/M and music sampler + * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). + * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). + * + * Other parameters should be self-explanatory (see also setfdprm(8)). */ /* Size @@ -1355,20 +1362,20 @@ static void fdc_specify(void) } /* Convert step rate from microseconds to milliseconds and 4 bits */ - srt = 16 - (DP->srt * scale_dtr / 1000 + NOMINAL_DTR - 1) / NOMINAL_DTR; + srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); if (slow_floppy) { srt = srt / 4; } SUPBOUND(srt, 0xf); INFBOUND(srt, 0); - hlt = (DP->hlt * scale_dtr / 2 + NOMINAL_DTR - 1) / NOMINAL_DTR; + hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); if (hlt < 0x01) hlt = 0x01; else if (hlt > 0x7f) hlt = hlt_max_code; - hut = (DP->hut * scale_dtr / 16 + NOMINAL_DTR - 1) / NOMINAL_DTR; + hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); if (hut < 0x1) hut = 0x1; else if (hut > 0xf) @@ -2236,9 +2243,9 @@ static void setup_format_params(int track) } } } - if (_floppy->stretch & FD_ZEROBASED) { + if (_floppy->stretch & FD_SECTBASEMASK) { for (count = 0; count < F_SECT_PER_TRACK; count++) - here[count].sect--; + here[count].sect += FD_SECTBASE(_floppy) - 1; } } @@ -2385,7 +2392,7 @@ static void rw_interrupt(void) #ifdef FLOPPY_SANITY_CHECK if (nr_sectors / ssize > - (in_sector_offset + current_count_sectors + ssize - 1) / ssize) { + DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { DPRINT("long rw: %x instead of %lx\n", nr_sectors, current_count_sectors); printk("rs=%d s=%d\n", R_SECTOR, SECTOR); @@ -2649,7 +2656,7 @@ static int make_raw_rw_request(void) } HEAD = fsector_t / _floppy->sect; - if (((_floppy->stretch & (FD_SWAPSIDES | FD_ZEROBASED)) || + if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect) max_sector = _floppy->sect; @@ -2679,7 +2686,7 @@ static int make_raw_rw_request(void) CODE2SIZE; SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + - ((_floppy->stretch & FD_ZEROBASED) ? 0 : 1); + FD_SECTBASE(_floppy); /* tracksize describes the size which can be filled up with sectors * of size ssize. @@ -3311,7 +3318,7 @@ static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, g->head <= 0 || g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || /* check if reserved bits are set */ - (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_ZEROBASED)) != 0) + (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) return -EINVAL; if (type) { if (!capable(CAP_SYS_ADMIN)) @@ -3356,7 +3363,7 @@ static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack || ((user_params[drive].sect ^ oldStretch) & - (FD_SWAPSIDES | FD_ZEROBASED))) + (FD_SWAPSIDES | FD_SECTBASEMASK))) invalidate_drive(bdev); else process_fd_request(); |
