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Subject[PATCHSET] PC-9800 subarch. support for 2.5.60 (5/34) AC#5
This is patchset to support NEC PC-9800 subarchitecture
against 2.5.60 (5/34).

PC98 support patch in 2.5.50-ac1 with minimum changes
to apply 2.5.60.
2.5.50-ac1-floppy98-1.patch and 2.5.50-ac1-floppy98-2.patch
make drivers/block/floppy98.c in 2.5.50-ac1.

diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.50/drivers/block/floppy98.c linux.50-ac1/drivers/block/floppy98.c
--- linux.50/drivers/block/floppy98.c 2003-02-11 18:39:41.000000000 +0900
+++ linux.50-ac1/drivers/block/floppy98.c 2003-02-11 18:36:04.000000000 +0900
@@ -2313,3 +2313,2338 @@
#endif
}

+static struct cont_t format_cont={
+ format_interrupt,
+ redo_format,
+ bad_flp_intr,
+ generic_done };
+
+static int do_format(kdev_t device, struct format_descr *tmp_format_req)
+{
+ int ret;
+ int drive=DRIVE(device);
+
+ LOCK_FDC(drive,1);
+ set_floppy(drive);
+ if (!_floppy ||
+ _floppy->track > DP->tracks ||
+ tmp_format_req->track >= _floppy->track ||
+ tmp_format_req->head >= _floppy->head ||
+ (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) ||
+ !_floppy->fmt_gap) {
+ process_fd_request();
+ return -EINVAL;
+ }
+ format_req = *tmp_format_req;
+ format_errors = 0;
+ cont = &format_cont;
+ errors = &format_errors;
+ IWAIT(redo_format);
+ process_fd_request();
+ return ret;
+}
+
+/*
+ * Buffer read/write and support
+ * =============================
+ */
+
+static inline void end_request(struct request *req, int uptodate)
+{
+ if (end_that_request_first(req, uptodate, current_count_sectors))
+ return;
+ add_disk_randomness(req->rq_disk);
+ floppy_off((int)req->rq_disk->private_data);
+ blkdev_dequeue_request(req);
+ end_that_request_last(req);
+
+ /* We're done with the request */
+ current_req = NULL;
+}
+
+
+/* new request_done. Can handle physical sectors which are smaller than a
+ * logical buffer */
+static void request_done(int uptodate)
+{
+ struct request_queue *q = &floppy_queue;
+ struct request *req = current_req;
+ unsigned long flags;
+ int block;
+
+ probing = 0;
+ reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate);
+
+ if (!req) {
+ printk("floppy.c: no request in request_done\n");
+ return;
+ }
+
+ if (uptodate){
+ /* maintain values for invalidation on geometry
+ * change */
+ block = current_count_sectors + req->sector;
+ INFBOUND(DRS->maxblock, block);
+ if (block > _floppy->sect)
+ DRS->maxtrack = 1;
+
+ /* unlock chained buffers */
+ spin_lock_irqsave(q->queue_lock, flags);
+ end_request(req, 1);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+ } else {
+ if (rq_data_dir(req) == WRITE) {
+ /* record write error information */
+ DRWE->write_errors++;
+ if (DRWE->write_errors == 1) {
+ DRWE->first_error_sector = req->sector;
+ DRWE->first_error_generation = DRS->generation;
+ }
+ DRWE->last_error_sector = req->sector;
+ DRWE->last_error_generation = DRS->generation;
+ }
+ spin_lock_irqsave(q->queue_lock, flags);
+ end_request(req, 0);
+ spin_unlock_irqrestore(q->queue_lock, flags);
+ }
+}
+
+/* Interrupt handler evaluating the result of the r/w operation */
+static void rw_interrupt(void)
+{
+ int nr_sectors, ssize, eoc, heads;
+
+ if (R_HEAD >= 2) {
+ /* some Toshiba floppy controllers occasionnally seem to
+ * return bogus interrupts after read/write operations, which
+ * can be recognized by a bad head number (>= 2) */
+ return;
+ }
+
+ if (!DRS->first_read_date)
+ DRS->first_read_date = jiffies;
+
+ nr_sectors = 0;
+ CODE2SIZE;
+
+ if (ST1 & ST1_EOC)
+ eoc = 1;
+ else
+ eoc = 0;
+
+ if (COMMAND & 0x80)
+ heads = 2;
+ else
+ heads = 1;
+
+ nr_sectors = (((R_TRACK-TRACK) * heads +
+ R_HEAD-HEAD) * SECT_PER_TRACK +
+ R_SECTOR-SECTOR + eoc) << SIZECODE >> 2;
+
+#ifdef FLOPPY_SANITY_CHECK
+ if (nr_sectors / ssize >
+ (in_sector_offset + current_count_sectors + ssize - 1) / ssize) {
+ DPRINT("long rw: %x instead of %lx\n",
+ nr_sectors, current_count_sectors);
+ printk("rs=%d s=%d\n", R_SECTOR, SECTOR);
+ printk("rh=%d h=%d\n", R_HEAD, HEAD);
+ printk("rt=%d t=%d\n", R_TRACK, TRACK);
+ printk("heads=%d eoc=%d\n", heads, eoc);
+ printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK,
+ fsector_t, ssize);
+ printk("in_sector_offset=%d\n", in_sector_offset);
+ }
+#endif
+
+ nr_sectors -= in_sector_offset;
+ INFBOUND(nr_sectors,0);
+ SUPBOUND(current_count_sectors, nr_sectors);
+
+ switch (interpret_errors()){
+ case 2:
+ cont->redo();
+ return;
+ case 1:
+ if (!current_count_sectors){
+ cont->error();
+ cont->redo();
+ return;
+ }
+ break;
+ case 0:
+ if (!current_count_sectors){
+ cont->redo();
+ return;
+ }
+ current_type[current_drive] = _floppy;
+ floppy_sizes[TOMINOR(current_drive) ]= _floppy->size;
+ break;
+ }
+
+ if (probing) {
+ if (DP->flags & FTD_MSG)
+ DPRINT("Auto-detected floppy type %s in fd%d\n",
+ _floppy->name,current_drive);
+ current_type[current_drive] = _floppy;
+ floppy_sizes[TOMINOR(current_drive)] = _floppy->size;
+ probing = 0;
+ }
+
+ if (CT(COMMAND) != FD_READ ||
+ raw_cmd->kernel_data == current_req->buffer){
+ /* transfer directly from buffer */
+ cont->done(1);
+ } else if (CT(COMMAND) == FD_READ){
+ buffer_track = raw_cmd->track;
+ buffer_drive = current_drive;
+ INFBOUND(buffer_max, nr_sectors + fsector_t);
+ }
+ cont->redo();
+}
+
+/* Compute maximal contiguous buffer size. */
+static int buffer_chain_size(void)
+{
+ struct bio *bio;
+ struct bio_vec *bv;
+ int size, i;
+ char *base;
+
+ base = bio_data(current_req->bio);
+ size = 0;
+
+ rq_for_each_bio(bio, current_req) {
+ bio_for_each_segment(bv, bio, i) {
+ if (page_address(bv->bv_page) + bv->bv_offset != base + size)
+ break;
+
+ size += bv->bv_len;
+ }
+ }
+
+ return size >> 9;
+}
+
+/* Compute the maximal transfer size */
+static int transfer_size(int ssize, int max_sector, int max_size)
+{
+ SUPBOUND(max_sector, fsector_t + max_size);
+
+ /* alignment */
+ max_sector -= (max_sector % _floppy->sect) % ssize;
+
+ /* transfer size, beginning not aligned */
+ current_count_sectors = max_sector - fsector_t ;
+
+ return max_sector;
+}
+
+/*
+ * Move data from/to the track buffer to/from the buffer cache.
+ */
+static void copy_buffer(int ssize, int max_sector, int max_sector_2)
+{
+ int remaining; /* number of transferred 512-byte sectors */
+ struct bio_vec *bv;
+ struct bio *bio;
+ char *buffer, *dma_buffer;
+ int size, i;
+
+ max_sector = transfer_size(ssize,
+ minimum(max_sector, max_sector_2),
+ current_req->nr_sectors);
+
+ if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
+ buffer_max > fsector_t + current_req->nr_sectors)
+ current_count_sectors = minimum(buffer_max - fsector_t,
+ current_req->nr_sectors);
+
+ remaining = current_count_sectors << 9;
+#ifdef FLOPPY_SANITY_CHECK
+ if ((remaining >> 9) > current_req->nr_sectors &&
+ CT(COMMAND) == FD_WRITE){
+ DPRINT("in copy buffer\n");
+ printk("current_count_sectors=%ld\n", current_count_sectors);
+ printk("remaining=%d\n", remaining >> 9);
+ printk("current_req->nr_sectors=%ld\n",current_req->nr_sectors);
+ printk("current_req->current_nr_sectors=%u\n",
+ current_req->current_nr_sectors);
+ printk("max_sector=%d\n", max_sector);
+ printk("ssize=%d\n", ssize);
+ }
+#endif
+
+ buffer_max = maximum(max_sector, buffer_max);
+
+ dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9);
+
+ size = current_req->current_nr_sectors << 9;
+
+ rq_for_each_bio(bio, current_req) {
+ bio_for_each_segment(bv, bio, i) {
+ if (!remaining)
+ break;
+
+ size = bv->bv_len;
+ SUPBOUND(size, remaining);
+
+ buffer = page_address(bv->bv_page) + bv->bv_offset;
+#ifdef FLOPPY_SANITY_CHECK
+ if (dma_buffer + size >
+ floppy_track_buffer + (max_buffer_sectors << 10) ||
+ dma_buffer < floppy_track_buffer){
+ DPRINT("buffer overrun in copy buffer %d\n",
+ (int) ((floppy_track_buffer - dma_buffer) >>9));
+ printk("fsector_t=%d buffer_min=%d\n",
+ fsector_t, buffer_min);
+ printk("current_count_sectors=%ld\n",
+ current_count_sectors);
+ if (CT(COMMAND) == FD_READ)
+ printk("read\n");
+ if (CT(COMMAND) == FD_READ)
+ printk("write\n");
+ break;
+ }
+ if (((unsigned long)buffer) % 512)
+ DPRINT("%p buffer not aligned\n", buffer);
+#endif
+ if (CT(COMMAND) == FD_READ)
+ memcpy(buffer, dma_buffer, size);
+ else
+ memcpy(dma_buffer, buffer, size);
+
+ remaining -= size;
+ dma_buffer += size;
+ }
+ }
+#ifdef FLOPPY_SANITY_CHECK
+ if (remaining){
+ if (remaining > 0)
+ max_sector -= remaining >> 9;
+ DPRINT("weirdness: remaining %d\n", remaining>>9);
+ }
+#endif
+}
+
+#if 0
+static inline int check_dma_crossing(char *start,
+ unsigned long length, char *message)
+{
+ if (CROSS_64KB(start, length)) {
+ printk("DMA xfer crosses 64KB boundary in %s %p-%p\n",
+ message, start, start+length);
+ return 1;
+ } else
+ return 0;
+}
+#endif
+
+/* work around a bug in pseudo DMA
+ * (on some FDCs) pseudo DMA does not stop when the CPU stops
+ * sending data. Hence we need a different way to signal the
+ * transfer length: We use SECT_PER_TRACK. Unfortunately, this
+ * does not work with MT, hence we can only transfer one head at
+ * a time
+ */
+static void virtualdmabug_workaround(void)
+{
+ int hard_sectors, end_sector;
+
+ if(CT(COMMAND) == FD_WRITE) {
+ COMMAND &= ~0x80; /* switch off multiple track mode */
+
+ hard_sectors = raw_cmd->length >> (7 + SIZECODE);
+ end_sector = SECTOR + hard_sectors - 1;
+#ifdef FLOPPY_SANITY_CHECK
+ if(end_sector > SECT_PER_TRACK) {
+ printk("too many sectors %d > %d\n",
+ end_sector, SECT_PER_TRACK);
+ return;
+ }
+#endif
+ SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points
+ * to end of transfer */
+ }
+}
+
+/*
+ * Formulate a read/write request.
+ * this routine decides where to load the data (directly to buffer, or to
+ * tmp floppy area), how much data to load (the size of the buffer, the whole
+ * track, or a single sector)
+ * All floppy_track_buffer handling goes in here. If we ever add track buffer
+ * allocation on the fly, it should be done here. No other part should need
+ * modification.
+ */
+
+static int make_raw_rw_request(void)
+{
+ int aligned_sector_t;
+ int max_sector, max_size, tracksize, ssize;
+
+ if(max_buffer_sectors == 0) {
+ printk("VFS: Block I/O scheduled on unopened device\n");
+ return 0;
+ }
+
+ set_fdc((int)current_req->rq_disk->private_data);
+
+ raw_cmd = &default_raw_cmd;
+ raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
+ FD_RAW_NEED_SEEK;
+ raw_cmd->cmd_count = NR_RW;
+ if (rq_data_dir(current_req) == READ) {
+ raw_cmd->flags |= FD_RAW_READ;
+ COMMAND = FM_MODE(_floppy,FD_READ);
+ } else if (rq_data_dir(current_req) == WRITE){
+ raw_cmd->flags |= FD_RAW_WRITE;
+ COMMAND = FM_MODE(_floppy,FD_WRITE);
+ } else {
+ DPRINT("make_raw_rw_request: unknown command\n");
+ return 0;
+ }
+
+ max_sector = _floppy->sect * _floppy->head;
+
+ TRACK = (int)current_req->sector / max_sector;
+ fsector_t = (int)current_req->sector % max_sector;
+ if (_floppy->track && TRACK >= _floppy->track) {
+ if (current_req->current_nr_sectors & 1) {
+ current_count_sectors = 1;
+ return 1;
+ } else
+ return 0;
+ }
+ HEAD = fsector_t / _floppy->sect;
+
+ if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) &&
+ fsector_t < _floppy->sect)
+ max_sector = _floppy->sect;
+
+ /* 2M disks have phantom sectors on the first track */
+ if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){
+ max_sector = 2 * _floppy->sect / 3;
+ if (fsector_t >= max_sector){
+ current_count_sectors = minimum(_floppy->sect - fsector_t,
+ current_req->nr_sectors);
+ return 1;
+ }
+ SIZECODE = 2;
+ } else
+ SIZECODE = FD_SIZECODE(_floppy);
+ raw_cmd->rate = _floppy->rate & 0x43;
+ if ((_floppy->rate & FD_2M) &&
+ (TRACK || HEAD) &&
+ raw_cmd->rate == 2)
+ raw_cmd->rate = 1;
+
+ if (SIZECODE)
+ SIZECODE2 = 0xff;
+ else
+ SIZECODE2 = 0x80;
+ raw_cmd->track = TRACK << STRETCH(_floppy);
+ DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD);
+ GAP = _floppy->gap;
+ CODE2SIZE;
+ SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
+ SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + 1;
+
+ /* tracksize describes the size which can be filled up with sectors
+ * of size ssize.
+ */
+ tracksize = _floppy->sect - _floppy->sect % ssize;
+ if (tracksize < _floppy->sect){
+ SECT_PER_TRACK ++;
+ if (tracksize <= fsector_t % _floppy->sect)
+ SECTOR--;
+
+ /* if we are beyond tracksize, fill up using smaller sectors */
+ while (tracksize <= fsector_t % _floppy->sect){
+ while(tracksize + ssize > _floppy->sect){
+ SIZECODE--;
+ ssize >>= 1;
+ }
+ SECTOR++; SECT_PER_TRACK ++;
+ tracksize += ssize;
+ }
+ max_sector = HEAD * _floppy->sect + tracksize;
+ } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) {
+ max_sector = _floppy->sect;
+ } else if (!HEAD && CT(COMMAND) == FD_WRITE) {
+ /* for virtual DMA bug workaround */
+ max_sector = _floppy->sect;
+ }
+
+ in_sector_offset = (fsector_t % _floppy->sect) % ssize;
+ aligned_sector_t = fsector_t - in_sector_offset;
+ max_size = current_req->nr_sectors;
+ if ((raw_cmd->track == buffer_track) &&
+ (current_drive == buffer_drive) &&
+ (fsector_t >= buffer_min) && (fsector_t < buffer_max)) {
+ /* data already in track buffer */
+ if (CT(COMMAND) == FD_READ) {
+ copy_buffer(1, max_sector, buffer_max);
+ return 1;
+ }
+ } else if (in_sector_offset || current_req->nr_sectors < ssize){
+ if (CT(COMMAND) == FD_WRITE){
+ if (fsector_t + current_req->nr_sectors > ssize &&
+ fsector_t + current_req->nr_sectors < ssize + ssize)
+ max_size = ssize + ssize;
+ else
+ max_size = ssize;
+ }
+ raw_cmd->flags &= ~FD_RAW_WRITE;
+ raw_cmd->flags |= FD_RAW_READ;
+ COMMAND = FM_MODE(_floppy,FD_READ);
+ } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) {
+ unsigned long dma_limit;
+ int direct, indirect;
+
+ indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) -
+ fsector_t;
+
+ /*
+ * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
+ * on a 64 bit machine!
+ */
+ max_size = buffer_chain_size();
+ dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) current_req->buffer)) >> 9;
+ if ((unsigned long) max_size > dma_limit) {
+ max_size = dma_limit;
+ }
+ /* 64 kb boundaries */
+ if (CROSS_64KB(current_req->buffer, max_size << 9))
+ max_size = (K_64 -
+ ((unsigned long)current_req->buffer) % K_64)>>9;
+ direct = transfer_size(ssize,max_sector,max_size) - fsector_t;
+ /*
+ * We try to read tracks, but if we get too many errors, we
+ * go back to reading just one sector at a time.
+ *
+ * This means we should be able to read a sector even if there
+ * are other bad sectors on this track.
+ */
+ if (!direct ||
+ (indirect * 2 > direct * 3 &&
+ *errors < DP->max_errors.read_track &&
+ /*!TESTF(FD_NEED_TWADDLE) &&*/
+ ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){
+ max_size = current_req->nr_sectors;
+ } else {
+ raw_cmd->kernel_data = current_req->buffer;
+ raw_cmd->length = current_count_sectors << 9;
+ if (raw_cmd->length == 0){
+ DPRINT("zero dma transfer attempted from make_raw_request\n");
+ DPRINT("indirect=%d direct=%d fsector_t=%d",
+ indirect, direct, fsector_t);
+ return 0;
+ }
+/* check_dma_crossing(raw_cmd->kernel_data,
+ raw_cmd->length,
+ "end of make_raw_request [1]");*/
+
+ virtualdmabug_workaround();
+ return 2;
+ }
+ }
+
+ if (CT(COMMAND) == FD_READ)
+ max_size = max_sector; /* unbounded */
+
+ /* claim buffer track if needed */
+ if (buffer_track != raw_cmd->track || /* bad track */
+ buffer_drive !=current_drive || /* bad drive */
+ fsector_t > buffer_max ||
+ fsector_t < buffer_min ||
+ ((CT(COMMAND) == FD_READ ||
+ (!in_sector_offset && current_req->nr_sectors >= ssize))&&
+ max_sector > 2 * max_buffer_sectors + buffer_min &&
+ max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)
+ /* not enough space */){
+ buffer_track = -1;
+ buffer_drive = current_drive;
+ buffer_max = buffer_min = aligned_sector_t;
+ }
+ raw_cmd->kernel_data = floppy_track_buffer +
+ ((aligned_sector_t-buffer_min)<<9);
+
+ if (CT(COMMAND) == FD_WRITE){
+ /* copy write buffer to track buffer.
+ * if we get here, we know that the write
+ * is either aligned or the data already in the buffer
+ * (buffer will be overwritten) */
+#ifdef FLOPPY_SANITY_CHECK
+ if (in_sector_offset && buffer_track == -1)
+ DPRINT("internal error offset !=0 on write\n");
+#endif
+ buffer_track = raw_cmd->track;
+ buffer_drive = current_drive;
+ copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min);
+ } else
+ transfer_size(ssize, max_sector,
+ 2*max_buffer_sectors+buffer_min-aligned_sector_t);
+
+ /* round up current_count_sectors to get dma xfer size */
+ raw_cmd->length = in_sector_offset+current_count_sectors;
+ raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1;
+ raw_cmd->length <<= 9;
+#ifdef FLOPPY_SANITY_CHECK
+ /*check_dma_crossing(raw_cmd->kernel_data, raw_cmd->length,
+ "end of make_raw_request");*/
+ if ((raw_cmd->length < current_count_sectors << 9) ||
+ (raw_cmd->kernel_data != current_req->buffer &&
+ CT(COMMAND) == FD_WRITE &&
+ (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
+ aligned_sector_t < buffer_min)) ||
+ raw_cmd->length % (128 << SIZECODE) ||
+ raw_cmd->length <= 0 || current_count_sectors <= 0){
+ DPRINT("fractionary current count b=%lx s=%lx\n",
+ raw_cmd->length, current_count_sectors);
+ if (raw_cmd->kernel_data != current_req->buffer)
+ printk("addr=%d, length=%ld\n",
+ (int) ((raw_cmd->kernel_data -
+ floppy_track_buffer) >> 9),
+ current_count_sectors);
+ printk("st=%d ast=%d mse=%d msi=%d\n",
+ fsector_t, aligned_sector_t, max_sector, max_size);
+ printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
+ printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
+ COMMAND, SECTOR, HEAD, TRACK);
+ printk("buffer drive=%d\n", buffer_drive);
+ printk("buffer track=%d\n", buffer_track);
+ printk("buffer_min=%d\n", buffer_min);
+ printk("buffer_max=%d\n", buffer_max);
+ return 0;
+ }
+
+ if (raw_cmd->kernel_data != current_req->buffer){
+ if (raw_cmd->kernel_data < floppy_track_buffer ||
+ current_count_sectors < 0 ||
+ raw_cmd->length < 0 ||
+ raw_cmd->kernel_data + raw_cmd->length >
+ floppy_track_buffer + (max_buffer_sectors << 10)){
+ DPRINT("buffer overrun in schedule dma\n");
+ printk("fsector_t=%d buffer_min=%d current_count=%ld\n",
+ fsector_t, buffer_min,
+ raw_cmd->length >> 9);
+ printk("current_count_sectors=%ld\n",
+ current_count_sectors);
+ if (CT(COMMAND) == FD_READ)
+ printk("read\n");
+ if (CT(COMMAND) == FD_READ)
+ printk("write\n");
+ return 0;
+ }
+ } else if (raw_cmd->length > current_req->nr_sectors << 9 ||
+ current_count_sectors > current_req->nr_sectors){
+ DPRINT("buffer overrun in direct transfer\n");
+ return 0;
+ } else if (raw_cmd->length < current_count_sectors << 9){
+ DPRINT("more sectors than bytes\n");
+ printk("bytes=%ld\n", raw_cmd->length >> 9);
+ printk("sectors=%ld\n", current_count_sectors);
+ }
+ if (raw_cmd->length == 0){
+ DPRINT("zero dma transfer attempted from make_raw_request\n");
+ return 0;
+ }
+#endif
+
+ virtualdmabug_workaround();
+ return 2;
+}
+
+static void redo_fd_request(void)
+{
+#define REPEAT {request_done(0); continue; }
+ int drive;
+ int tmp;
+
+ lastredo = jiffies;
+ if (current_drive < N_DRIVE)
+ floppy_off(current_drive);
+
+ for (;;) {
+ if (!current_req) {
+ struct request *req = elv_next_request(&floppy_queue);
+ if (!req) {
+ do_floppy = NULL;
+ unlock_fdc();
+ return;
+ }
+ current_req = req;
+ }
+ drive = (int)current_req->rq_disk->private_data;
+ set_fdc(drive);
+ reschedule_timeout(current_reqD, "redo fd request", 0);
+
+ set_floppy(drive);
+ raw_cmd = & default_raw_cmd;
+ raw_cmd->flags = 0;
+ if (start_motor(redo_fd_request)) return;
+ disk_change(current_drive);
+ if (test_bit(current_drive, &fake_change) ||
+ TESTF(FD_DISK_CHANGED)){
+ DPRINT("disk absent or changed during operation\n");
+ REPEAT;
+ }
+ if (!_floppy) { /* Autodetection */
+ if (!probing){
+ DRS->probed_format = 0;
+ if (next_valid_format()){
+ DPRINT("no autodetectable formats\n");
+ _floppy = NULL;
+ REPEAT;
+ }
+ }
+ probing = 1;
+ _floppy = floppy_type+DP->autodetect[DRS->probed_format];
+ } else
+ probing = 0;
+ errors = & (current_req->errors);
+ tmp = make_raw_rw_request();
+ if (tmp < 2){
+ request_done(tmp);
+ continue;
+ }
+
+ if (TESTF(FD_NEED_TWADDLE))
+ twaddle();
+ schedule_bh( (void *)(void *) floppy_start);
+#ifdef DEBUGT
+ debugt("queue fd request");
+#endif
+ return;
+ }
+#undef REPEAT
+}
+
+static struct cont_t rw_cont={
+ rw_interrupt,
+ redo_fd_request,
+ bad_flp_intr,
+ request_done };
+
+static void process_fd_request(void)
+{
+ cont = &rw_cont;
+ schedule_bh( (void *)(void *) redo_fd_request);
+}
+
+static void do_fd_request(request_queue_t * q)
+{
+ if(max_buffer_sectors == 0) {
+ printk("VFS: do_fd_request called on non-open device\n");
+ return;
+ }
+
+ if (usage_count == 0) {
+ printk("warning: usage count=0, current_req=%p exiting\n", current_req);
+ printk("sect=%ld flags=%lx\n", (long)current_req->sector, current_req->flags);
+ return;
+ }
+ if (fdc_busy){
+ /* fdc busy, this new request will be treated when the
+ current one is done */
+ is_alive("do fd request, old request running");
+ return;
+ }
+ lock_fdc(MAXTIMEOUT,0);
+ process_fd_request();
+ is_alive("do fd request");
+}
+
+static struct cont_t poll_cont={
+ success_and_wakeup,
+ floppy_ready,
+ generic_failure,
+ generic_done };
+
+static int poll_drive(int interruptible, int flag)
+{
+ int ret;
+ /* no auto-sense, just clear dcl */
+ raw_cmd = &default_raw_cmd;
+ raw_cmd->flags= flag;
+ raw_cmd->track=0;
+ raw_cmd->cmd_count=0;
+ cont = &poll_cont;
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("setting NEWCHANGE in poll_drive\n");
+ }
+#endif
+ SETF(FD_DISK_NEWCHANGE);
+ WAIT(floppy_ready);
+ return ret;
+}
+
+/*
+ * User triggered reset
+ * ====================
+ */
+
+static void reset_intr(void)
+{
+ printk("weird, reset interrupt called\n");
+}
+
+static struct cont_t reset_cont={
+ reset_intr,
+ success_and_wakeup,
+ generic_failure,
+ generic_done };
+
+static int user_reset_fdc(int drive, int arg, int interruptible)
+{
+ int ret;
+
+ ret=0;
+ LOCK_FDC(drive,interruptible);
+ if (arg == FD_RESET_ALWAYS)
+ FDCS->reset=1;
+ if (FDCS->reset){
+ cont = &reset_cont;
+ WAIT(reset_fdc);
+ }
+ process_fd_request();
+ return ret;
+}
+
+/*
+ * Misc Ioctl's and support
+ * ========================
+ */
+static inline int fd_copyout(void *param, const void *address, unsigned long size)
+{
+ return copy_to_user(param,address, size) ? -EFAULT : 0;
+}
+
+static inline int fd_copyin(void *param, void *address, unsigned long size)
+{
+ return copy_from_user(address, param, size) ? -EFAULT : 0;
+}
+
+#define _COPYOUT(x) (copy_to_user((void *)param, &(x), sizeof(x)) ? -EFAULT : 0)
+#define _COPYIN(x) (copy_from_user(&(x), (void *)param, sizeof(x)) ? -EFAULT : 0)
+
+#define COPYOUT(x) ECALL(_COPYOUT(x))
+#define COPYIN(x) ECALL(_COPYIN(x))
+
+static inline const char *drive_name(int type, int drive)
+{
+ struct floppy_struct *floppy;
+
+ if (type)
+ floppy = floppy_type + type;
+ else {
+ if (UDP->native_format)
+ floppy = floppy_type + UDP->native_format;
+ else
+ return "(null)";
+ }
+ if (floppy->name)
+ return floppy->name;
+ else
+ return "(null)";
+}
+
+
+/* raw commands */
+static void raw_cmd_done(int flag)
+{
+ int i;
+
+ if (!flag) {
+ raw_cmd->flags |= FD_RAW_FAILURE;
+ raw_cmd->flags |= FD_RAW_HARDFAILURE;
+ } else {
+ raw_cmd->reply_count = inr;
+ if (raw_cmd->reply_count > MAX_REPLIES)
+ raw_cmd->reply_count=0;
+ for (i=0; i< raw_cmd->reply_count; i++)
+ raw_cmd->reply[i] = reply_buffer[i];
+
+ if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE))
+ {
+ unsigned long flags;
+ flags=claim_dma_lock();
+ raw_cmd->length = fd_get_dma_residue();
+ release_dma_lock(flags);
+ }
+
+ if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
+ (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
+ raw_cmd->flags |= FD_RAW_FAILURE;
+
+ if (disk_change(current_drive))
+ raw_cmd->flags |= FD_RAW_DISK_CHANGE;
+ else
+ raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
+ if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
+ motor_off_callback(current_drive);
+
+ if (raw_cmd->next &&
+ (!(raw_cmd->flags & FD_RAW_FAILURE) ||
+ !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
+ ((raw_cmd->flags & FD_RAW_FAILURE) ||
+ !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) {
+ raw_cmd = raw_cmd->next;
+ return;
+ }
+ }
+ generic_done(flag);
+}
+
+
+static struct cont_t raw_cmd_cont={
+ success_and_wakeup,
+ floppy_start,
+ generic_failure,
+ raw_cmd_done
+};
+
+static inline int raw_cmd_copyout(int cmd, char *param,
+ struct floppy_raw_cmd *ptr)
+{
+ int ret;
+
+ while(ptr) {
+ COPYOUT(*ptr);
+ param += sizeof(struct floppy_raw_cmd);
+ if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){
+ if (ptr->length>=0 && ptr->length<=ptr->buffer_length)
+ ECALL(fd_copyout(ptr->data,
+ ptr->kernel_data,
+ ptr->buffer_length -
+ ptr->length));
+ }
+ ptr = ptr->next;
+ }
+ return 0;
+}
+
+
+static void raw_cmd_free(struct floppy_raw_cmd **ptr)
+{
+ struct floppy_raw_cmd *next,*this;
+
+ this = *ptr;
+ *ptr = 0;
+ while(this) {
+ if (this->buffer_length) {
+ fd_dma_mem_free((unsigned long)this->kernel_data,
+ this->buffer_length);
+ this->buffer_length = 0;
+ }
+ next = this->next;
+ kfree(this);
+ this = next;
+ }
+}
+
+
+static inline int raw_cmd_copyin(int cmd, char *param,
+ struct floppy_raw_cmd **rcmd)
+{
+ struct floppy_raw_cmd *ptr;
+ int ret;
+ int i;
+
+ *rcmd = 0;
+ while(1) {
+ ptr = (struct floppy_raw_cmd *)
+ kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
+ if (!ptr)
+ return -ENOMEM;
+ *rcmd = ptr;
+ COPYIN(*ptr);
+ ptr->next = 0;
+ ptr->buffer_length = 0;
+ param += sizeof(struct floppy_raw_cmd);
+ if (ptr->cmd_count > 33)
+ /* the command may now also take up the space
+ * initially intended for the reply & the
+ * reply count. Needed for long 82078 commands
+ * such as RESTORE, which takes ... 17 command
+ * bytes. Murphy's law #137: When you reserve
+ * 16 bytes for a structure, you'll one day
+ * discover that you really need 17...
+ */
+ return -EINVAL;
+
+ for (i=0; i< 16; i++)
+ ptr->reply[i] = 0;
+ ptr->resultcode = 0;
+ ptr->kernel_data = 0;
+
+ if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
+ if (ptr->length <= 0)
+ return -EINVAL;
+ ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length);
+ fallback_on_nodma_alloc(&ptr->kernel_data,
+ ptr->length);
+ if (!ptr->kernel_data)
+ return -ENOMEM;
+ ptr->buffer_length = ptr->length;
+ }
+ if (ptr->flags & FD_RAW_WRITE)
+ ECALL(fd_copyin(ptr->data, ptr->kernel_data,
+ ptr->length));
+ rcmd = & (ptr->next);
+ if (!(ptr->flags & FD_RAW_MORE))
+ return 0;
+ ptr->rate &= 0x43;
+ }
+}
+
+
+static int raw_cmd_ioctl(int cmd, void *param)
+{
+ int drive, ret, ret2;
+ struct floppy_raw_cmd *my_raw_cmd;
+
+ if (FDCS->rawcmd <= 1)
+ FDCS->rawcmd = 1;
+ for (drive= 0; drive < N_DRIVE; drive++){
+ if (FDC(drive) != fdc)
+ continue;
+ if (drive == current_drive){
+ if (UDRS->fd_ref > 1){
+ FDCS->rawcmd = 2;
+ break;
+ }
+ } else if (UDRS->fd_ref){
+ FDCS->rawcmd = 2;
+ break;
+ }
+ }
+
+ if (FDCS->reset)
+ return -EIO;
+
+ ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
+ if (ret) {
+ raw_cmd_free(&my_raw_cmd);
+ return ret;
+ }
+
+ raw_cmd = my_raw_cmd;
+ cont = &raw_cmd_cont;
+ ret=wait_til_done(floppy_start,1);
+#ifdef DCL_DEBUG
+ if (DP->flags & FD_DEBUG){
+ DPRINT("calling disk change from raw_cmd ioctl\n");
+ }
+#endif
+
+ if (ret != -EINTR && FDCS->reset)
+ ret = -EIO;
+
+ DRS->track = NO_TRACK;
+
+ ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
+ if (!ret)
+ ret = ret2;
+ raw_cmd_free(&my_raw_cmd);
+ return ret;
+}
+
+static int invalidate_drive(struct block_device *bdev)
+{
+ /* invalidate the buffer track to force a reread */
+ set_bit(DRIVE(to_kdev_t(bdev->bd_dev)), &fake_change);
+ process_fd_request();
+ check_disk_change(bdev);
+ return 0;
+}
+
+
+static inline void clear_write_error(int drive)
+{
+ CLEARSTRUCT(UDRWE);
+}
+
+static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
+ int drive, int type, struct block_device *bdev)
+{
+ int cnt;
+
+ /* sanity checking for parameters.*/
+ if (g->sect <= 0 ||
+ g->head <= 0 ||
+ g->track <= 0 ||
+ g->track > UDP->tracks>>STRETCH(g) ||
+ /* check if reserved bits are set */
+ (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0)
+ return -EINVAL;
+ if (type){
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ LOCK_FDC(drive,1);
+ for (cnt = 0; cnt < N_DRIVE; cnt++){
+ if (ITYPE(drive_state[cnt].fd_device) == type &&
+ drive_state[cnt].fd_ref)
+ set_bit(drive, &fake_change);
+ }
+ floppy_type[type] = *g;
+ floppy_type[type].name="user format";
+ for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
+ floppy_sizes[cnt]= floppy_sizes[cnt+0x80]=
+ floppy_type[type].size+1;
+ process_fd_request();
+ for (cnt = 0; cnt < N_DRIVE; cnt++){
+ if (ITYPE(drive_state[cnt].fd_device) == type &&
+ drive_state[cnt].fd_ref)
+ __check_disk_change(
+ MKDEV(FLOPPY_MAJOR,
+ drive_state[cnt].fd_device));
+ }
+ } else {
+ LOCK_FDC(drive,1);
+ if (cmd != FDDEFPRM)
+ /* notice a disk change immediately, else
+ * we lose our settings immediately*/
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ user_params[drive] = *g;
+ if (buffer_drive == drive)
+ SUPBOUND(buffer_max, user_params[drive].sect);
+ current_type[drive] = &user_params[drive];
+ floppy_sizes[drive] = user_params[drive].size;
+ if (cmd == FDDEFPRM)
+ DRS->keep_data = -1;
+ else
+ DRS->keep_data = 1;
+ /* invalidation. Invalidate only when needed, i.e.
+ * when there are already sectors in the buffer cache
+ * whose number will change. This is useful, because
+ * mtools often changes the geometry of the disk after
+ * looking at the boot block */
+ if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack)
+ invalidate_drive(bdev);
+ else
+ process_fd_request();
+ }
+ return 0;
+}
+
+/* handle obsolete ioctl's */
+static int ioctl_table[]= {
+ FDCLRPRM,
+ FDSETPRM,
+ FDDEFPRM,
+ FDGETPRM,
+ FDMSGON,
+ FDMSGOFF,
+ FDFMTBEG,
+ FDFMTTRK,
+ FDFMTEND,
+ FDSETEMSGTRESH,
+ FDFLUSH,
+ FDSETMAXERRS,
+ FDGETMAXERRS,
+ FDGETDRVTYP,
+ FDSETDRVPRM,
+ FDGETDRVPRM,
+ FDGETDRVSTAT,
+ FDPOLLDRVSTAT,
+ FDRESET,
+ FDGETFDCSTAT,
+ FDWERRORCLR,
+ FDWERRORGET,
+ FDRAWCMD,
+ FDEJECT,
+ FDTWADDLE
+};
+
+static inline int normalize_ioctl(int *cmd, int *size)
+{
+ int i;
+
+ for (i=0; i < ARRAY_SIZE(ioctl_table); i++) {
+ if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)){
+ *size = _IOC_SIZE(*cmd);
+ *cmd = ioctl_table[i];
+ if (*size > _IOC_SIZE(*cmd)) {
+ printk("ioctl not yet supported\n");
+ return -EFAULT;
+ }
+ return 0;
+ }
+ }
+ return -EINVAL;
+}
+
+static int get_floppy_geometry(int drive, int type, struct floppy_struct **g)
+{
+ if (type)
+ *g = &floppy_type[type];
+ else {
+ LOCK_FDC(drive,0);
+ CALL(poll_drive(0,0));
+ process_fd_request();
+ *g = current_type[drive];
+ }
+ if (!*g)
+ return -ENODEV;
+ return 0;
+}
+
+static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long param)
+{
+#define FD_IOCTL_ALLOWED ((filp) && (filp)->private_data)
+#define OUT(c,x) case c: outparam = (const char *) (x); break
+#define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
+
+ int i,drive,type;
+ kdev_t device;
+ int ret;
+ int size;
+ union inparam {
+ struct floppy_struct g; /* geometry */
+ struct format_descr f;
+ struct floppy_max_errors max_errors;
+ struct floppy_drive_params dp;
+ } inparam; /* parameters coming from user space */
+ const char *outparam; /* parameters passed back to user space */
+
+ device = inode->i_rdev;
+ type = TYPE(device);
+ drive = DRIVE(device);
+
+ /* convert compatibility eject ioctls into floppy eject ioctl.
+ * We do this in order to provide a means to eject floppy disks before
+ * installing the new fdutils package */
+ if (cmd == CDROMEJECT || /* CD-ROM eject */
+ cmd == 0x6470 /* SunOS floppy eject */) {
+ DPRINT("obsolete eject ioctl\n");
+ DPRINT("please use floppycontrol --eject\n");
+ cmd = FDEJECT;
+ }
+
+ /* generic block device ioctls */
+ switch(cmd) {
+ /* the following have been inspired by the corresponding
+ * code for other block devices. */
+ struct floppy_struct *g;
+ case HDIO_GETGEO:
+ {
+ struct hd_geometry loc;
+ ECALL(get_floppy_geometry(drive, type, &g));
+ loc.heads = g->head;
+ loc.sectors = g->sect;
+ loc.cylinders = g->track;
+ loc.start = 0;
+ return _COPYOUT(loc);
+ }
+ }
+
+ /* convert the old style command into a new style command */
+ if ((cmd & 0xff00) == 0x0200) {
+ ECALL(normalize_ioctl(&cmd, &size));
+ } else
+ return -EINVAL;
+
+ /* permission checks */
+ if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) ||
+ ((cmd & 0x80) && !capable(CAP_SYS_ADMIN)))
+ return -EPERM;
+
+ /* copyin */
+ CLEARSTRUCT(&inparam);
+ if (_IOC_DIR(cmd) & _IOC_WRITE)
+ ECALL(fd_copyin((void *)param, &inparam, size))
+
+ switch (cmd) {
+ case FDEJECT:
+ if (UDRS->fd_ref != 1)
+ /* somebody else has this drive open */
+ return -EBUSY;
+ LOCK_FDC(drive,1);
+
+ /* do the actual eject. Fails on
+ * non-Sparc architectures */
+ ret=fd_eject(UNIT(drive));
+
+ USETF(FD_DISK_CHANGED);
+ USETF(FD_VERIFY);
+ process_fd_request();
+ return ret;
+ case FDCLRPRM:
+ LOCK_FDC(drive,1);
+ current_type[drive] = NULL;
+ floppy_sizes[drive] = MAX_DISK_SIZE << 1;
+ UDRS->keep_data = 0;
+ return invalidate_drive(inode->i_bdev);
+ case FDSETPRM:
+ case FDDEFPRM:
+ return set_geometry(cmd, & inparam.g,
+ drive, type, inode->i_bdev);
+ case FDGETPRM:
+ ECALL(get_floppy_geometry(drive, type,
+ (struct floppy_struct**)
+ &outparam));
+ break;
+
+ case FDMSGON:
+ UDP->flags |= FTD_MSG;
+ return 0;
+ case FDMSGOFF:
+ UDP->flags &= ~FTD_MSG;
+ return 0;
+
+ case FDFMTBEG:
+ LOCK_FDC(drive,1);
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ if (ret & FD_VERIFY) {
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ }
+
+ if (ret & FD_VERIFY) {
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ }
+
+ if (ret & FD_VERIFY) {
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ }
+
+ if (ret & FD_VERIFY) {
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ }
+
+ if(ret & FD_VERIFY){
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ ret = UDRS->flags;
+ }
+ process_fd_request();
+ if (ret & FD_VERIFY)
+ return -ENODEV;
+ if (!(ret & FD_DISK_WRITABLE))
+ return -EROFS;
+ return 0;
+ case FDFMTTRK:
+ if (UDRS->fd_ref != 1)
+ return -EBUSY;
+ return do_format(device, &inparam.f);
+ case FDFMTEND:
+ case FDFLUSH:
+ LOCK_FDC(drive,1);
+ return invalidate_drive(inode->i_bdev);
+
+ case FDSETEMSGTRESH:
+ UDP->max_errors.reporting =
+ (unsigned short) (param & 0x0f);
+ return 0;
+ OUT(FDGETMAXERRS, &UDP->max_errors);
+ IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
+
+ case FDGETDRVTYP:
+ outparam = drive_name(type,drive);
+ SUPBOUND(size,strlen(outparam)+1);
+ break;
+
+ IN(FDSETDRVPRM, UDP, dp);
+ OUT(FDGETDRVPRM, UDP);
+
+ case FDPOLLDRVSTAT:
+ LOCK_FDC(drive,1);
+ CALL(poll_drive(1, FD_RAW_NEED_DISK));
+ process_fd_request();
+ /* fall through */
+ OUT(FDGETDRVSTAT, UDRS);
+
+ case FDRESET:
+ return user_reset_fdc(drive, (int)param, 1);
+
+ OUT(FDGETFDCSTAT,UFDCS);
+
+ case FDWERRORCLR:
+ CLEARSTRUCT(UDRWE);
+ return 0;
+ OUT(FDWERRORGET,UDRWE);
+
+ case FDRAWCMD:
+ if (type)
+ return -EINVAL;
+ LOCK_FDC(drive,1);
+ set_floppy(drive);
+ CALL(i = raw_cmd_ioctl(cmd,(void *) param));
+ process_fd_request();
+ return i;
+
+ case FDTWADDLE:
+ LOCK_FDC(drive,1);
+ twaddle();
+ process_fd_request();
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (_IOC_DIR(cmd) & _IOC_READ)
+ return fd_copyout((void *)param, outparam, size);
+ else
+ return 0;
+#undef OUT
+#undef IN
+}
+
+static void __init config_types(void)
+{
+ int first=1;
+ int drive;
+ extern struct fd_info {
+ unsigned char dummy[4 * 6];
+ unsigned char fd_types[8];
+ } drive_info;
+
+ for (drive = 0; drive < 4; drive++)
+ UDP->cmos = drive_info.fd_types[drive];
+
+ /* XXX */
+ /* additional physical CMOS drive detection should go here */
+
+ for (drive=0; drive < N_DRIVE; drive++){
+ unsigned int type = UDP->cmos;
+ struct floppy_drive_params *params;
+ const char *name = NULL;
+ static char temparea[32];
+
+ if (type < NUMBER(default_drive_params)) {
+ params = &default_drive_params[type].params;
+ if (type) {
+ name = default_drive_params[type].name;
+ allowed_drive_mask |= 1 << drive;
+ }
+ } else {
+ params = &default_drive_params[0].params;
+ sprintf(temparea, "unknown type %d (usb?)", type);
+ name = temparea;
+ }
+ if (name) {
+ const char * prepend = ",";
+ if (first) {
+ prepend = KERN_INFO "Floppy drive(s):";
+ first = 0;
+ }
+ printk("%s fd%d is %s", prepend, drive, name);
+ register_devfs_entries (drive);
+ }
+ *UDP = *params;
+ }
+ if (!first)
+ printk("\n");
+}
+
+static int floppy_release(struct inode * inode, struct file * filp)
+{
+ int drive = DRIVE(inode->i_rdev);
+
+ if (UDRS->fd_ref < 0)
+ UDRS->fd_ref=0;
+ else if (!UDRS->fd_ref--) {
+ DPRINT("floppy_release with fd_ref == 0");
+ UDRS->fd_ref = 0;
+ }
+ floppy_release_irq_and_dma();
+ return 0;
+}
+
+/*
+ * floppy_open check for aliasing (/dev/fd0 can be the same as
+ * /dev/PS0 etc), and disallows simultaneous access to the same
+ * drive with different device numbers.
+ */
+#define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0)
+
+static int floppy_open(struct inode * inode, struct file * filp)
+{
+ int drive;
+ int old_dev;
+ int try;
+ char *tmp;
+
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy open: start\n");
+#endif
+ filp->private_data = (void*) 0;
+
+ drive = DRIVE(inode->i_rdev);
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy open: drive=%d, current_drive=%d, UDP->cmos=%d\n"
+ "floppy open: FDCS={spec1=%d, spec2=%d, dtr=%d, version=%d, dor=%d, address=%lu}\n",
+ drive, current_drive, UDP->cmos, FDCS->spec1, FDCS->spec2,
+ FDCS->dtr, FDCS->version, FDCS->dor, FDCS->address);
+ if (_floppy) {
+ printk("floppy open: _floppy={size=%d, sect=%d, head=%d, track=%d, spec1=%d}\n",
+ _floppy->size, _floppy->sect, _floppy->head,
+ _floppy->track, _floppy->spec1);
+ } else {
+ printk("floppy open: _floppy=NULL\n");
+ }
+#endif /* PC9800_DEBUG_FLOPPY */
+
+ if (drive >= N_DRIVE ||
+ !(allowed_drive_mask & (1 << drive)) ||
+ fdc_state[FDC(drive)].version == FDC_NONE)
+ return -ENXIO;
+
+ if (TYPE(inode->i_rdev) >= NUMBER(floppy_type))
+ return -ENXIO;
+ old_dev = UDRS->fd_device;
+ if (UDRS->fd_ref && old_dev != minor(inode->i_rdev))
+ return -EBUSY;
+
+ if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){
+ USETF(FD_DISK_CHANGED);
+ USETF(FD_VERIFY);
+ }
+
+ if (UDRS->fd_ref == -1 ||
+ (UDRS->fd_ref && (filp->f_flags & O_EXCL)))
+ return -EBUSY;
+
+ if (floppy_grab_irq_and_dma())
+ return -EBUSY;
+
+ if (filp->f_flags & O_EXCL)
+ UDRS->fd_ref = -1;
+ else
+ UDRS->fd_ref++;
+
+ if (!floppy_track_buffer){
+ /* if opening an ED drive, reserve a big buffer,
+ * else reserve a small one */
+ if ((UDP->cmos == 6) || (UDP->cmos == 5))
+ try = 64; /* Only 48 actually useful */
+ else
+ try = 32; /* Only 24 actually useful */
+
+ tmp=(char *)fd_dma_mem_alloc(1024 * try);
+ if (!tmp && !floppy_track_buffer) {
+ try >>= 1; /* buffer only one side */
+ INFBOUND(try, 16);
+ tmp= (char *)fd_dma_mem_alloc(1024*try);
+ }
+ if (!tmp && !floppy_track_buffer) {
+ fallback_on_nodma_alloc(&tmp, 2048 * try);
+ }
+ if (!tmp && !floppy_track_buffer) {
+ DPRINT("Unable to allocate DMA memory\n");
+ RETERR(ENXIO);
+ }
+ if (floppy_track_buffer) {
+ if (tmp)
+ fd_dma_mem_free((unsigned long)tmp,try*1024);
+ } else {
+ buffer_min = buffer_max = -1;
+ floppy_track_buffer = tmp;
+ max_buffer_sectors = try;
+ }
+ }
+
+ UDRS->fd_device = minor(inode->i_rdev);
+ set_capacity(disks[drive], floppy_sizes[minor(inode->i_rdev)]);
+ if (old_dev != -1 && old_dev != minor(inode->i_rdev)) {
+ if (buffer_drive == drive)
+ buffer_track = -1;
+ /* umm, invalidate_buffers() in ->open?? --hch */
+ invalidate_buffers(mk_kdev(FLOPPY_MAJOR,old_dev));
+ }
+
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy open: floppy.c:%d passed\n", __LINE__);
+#endif
+
+
+ /* Allow ioctls if we have write-permissions even if read-only open.
+ * Needed so that programs such as fdrawcmd still can work on write
+ * protected disks */
+ if ((filp->f_mode & 2) ||
+ (inode->i_sb && (permission(inode,2) == 0)))
+ filp->private_data = (void*) 8;
+
+ if (UFDCS->rawcmd == 1)
+ UFDCS->rawcmd = 2;
+
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy open: floppy.c:%d passed\n", __LINE__);
+#endif
+
+ if (filp->f_flags & O_NDELAY)
+ return 0;
+ if (filp->f_mode & 3) {
+ UDRS->last_checked = 0;
+ check_disk_change(inode->i_bdev);
+ if (UTESTF(FD_DISK_CHANGED))
+ RETERR(ENXIO);
+ }
+ if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE)))
+ RETERR(EROFS);
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("floppy open: end normally\n");
+#endif
+
+ return 0;
+#undef RETERR
+}
+
+/*
+ * Check if the disk has been changed or if a change has been faked.
+ */
+static int check_floppy_change(struct gendisk *disk)
+{
+ int drive = (int)disk->private_data;
+
+#ifdef PC9800_DEBUG_FLOPPY
+ printk("check_floppy_change: MINOR=%d\n", minor(dev));
+#endif
+
+ if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
+ return 1;
+
+ if (UDP->checkfreq < (int)(jiffies - UDRS->last_checked)) {
+ if(floppy_grab_irq_and_dma()) {
+ return 1;
+ }
+
+ lock_fdc(drive,0);
+ poll_drive(0,0);
+ process_fd_request();
+ floppy_release_irq_and_dma();
+ }
+
+ if (UTESTF(FD_DISK_CHANGED) ||
+ UTESTF(FD_VERIFY) ||
+ test_bit(drive, &fake_change) ||
+ (!ITYPE(UDRS->fd_device) && !current_type[drive]))
+ return 1;
+ return 0;
+}
+
+/*
+ * This implements "read block 0" for floppy_revalidate().
+ * Needed for format autodetection, checking whether there is
+ * a disk in the drive, and whether that disk is writable.
+ */
+
+static int floppy_rb0_complete(struct bio *bio, unsigned int bytes_done, int err)
+{
+ if (bio->bi_size)
+ return 1;
+
+ complete((struct completion*)bio->bi_private);
+ return 0;
+}
+
+static int __floppy_read_block_0(struct block_device *bdev)
+{
+ struct bio bio;
+ struct bio_vec bio_vec;
+ struct completion complete;
+ struct page *page;
+ size_t size;
+
+ page = alloc_page(GFP_NOIO);
+ if (!page) {
+ process_fd_request();
+ return -ENOMEM;
+ }
+
+ size = bdev->bd_block_size;
+ if (!size)
+ size = 1024;
+
+ bio_init(&bio);
+ bio.bi_io_vec = &bio_vec;
+ bio_vec.bv_page = page;
+ bio_vec.bv_len = size;
+ bio_vec.bv_offset = 0;
+ bio.bi_vcnt = 1;
+ bio.bi_idx = 0;
+ bio.bi_size = size;
+ bio.bi_bdev = bdev;
+ bio.bi_sector = 0;
+ init_completion(&complete);
+ bio.bi_private = &complete;
+ bio.bi_end_io = floppy_rb0_complete;
+
+ submit_bio(READ, &bio);
+ generic_unplug_device(bdev_get_queue(bdev));
+ process_fd_request();
+ wait_for_completion(&complete);
+
+ __free_page(page);
+
+ return 0;
+}
+
+static int floppy_read_block_0(struct gendisk *disk)
+{
+ struct block_device *bdev;
+ int ret;
+
+ bdev = bdget(MKDEV(disk->major, disk->first_minor));
+ if (!bdev) {
+ printk("No block device for %s\n", disk->disk_name);
+ BUG();
+ }
+ bdev->bd_disk = disk; /* ewww */
+ ret = __floppy_read_block_0(bdev);
+ atomic_dec(&bdev->bd_count);
+ return ret;
+}
+
+/* revalidate the floppy disk, i.e. trigger format autodetection by reading
+ * the bootblock (block 0). "Autodetection" is also needed to check whether
+ * there is a disk in the drive at all... Thus we also do it for fixed
+ * geometry formats */
+static int floppy_revalidate(struct gendisk *disk)
+{
+ int drive=(int)disk->private_data;
+#define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device))
+ int cf;
+ int res = 0;
+
+ if (UTESTF(FD_DISK_CHANGED) ||
+ UTESTF(FD_VERIFY) ||
+ test_bit(drive, &fake_change) ||
+ NO_GEOM){
+ if(usage_count == 0) {
+ printk("VFS: revalidate called on non-open device.\n");
+ return -EFAULT;
+ }
+ lock_fdc(drive,0);
+ cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
+ if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){
+ process_fd_request(); /*already done by another thread*/
+ return 0;
+ }
+ UDRS->maxblock = 0;
+ UDRS->maxtrack = 0;
+ if (buffer_drive == drive)
+ buffer_track = -1;
+ clear_bit(drive, &fake_change);
+ UCLEARF(FD_DISK_CHANGED);
+ if (cf)
+ UDRS->generation++;
+ if (NO_GEOM){
+ /* auto-sensing */
+ res = floppy_read_block_0(disk);
+ } else {
+ if (cf)
+ poll_drive(0, FD_RAW_NEED_DISK);
+ process_fd_request();
+ }
+ }
+ set_capacity(disk, floppy_sizes[UDRS->fd_device]);
+ return res;
+}
+
+static struct block_device_operations floppy_fops = {
+ .owner = THIS_MODULE,
+ .open = floppy_open,
+ .release = floppy_release,
+ .ioctl = fd_ioctl,
+ .media_changed = check_floppy_change,
+ .revalidate_disk= floppy_revalidate,
+};
+
+static void __init register_devfs_entries (int drive)
+{
+ int base_minor, i;
+ static char *table[] =
+ {"",
+#if 0
+ "d360",
+#else
+ "h1232",
+#endif
+ "h1200", "u360", "u720", "h360", "h720",
+ "u1440", "u2880", "CompaQ", "h1440", "u1680", "h410",
+ "u820", "h1476", "u1722", "h420", "u830", "h1494", "u1743",
+ "h880", "u1040", "u1120", "h1600", "u1760", "u1920",
+ "u3200", "u3520", "u3840", "u1840", "u800", "u1600",
+ NULL
+ };
+ static int t360[] = {1,0}, t1200[] = {2,5,6,10,12,14,16,18,20,23,0},
+ t3in[] = {8,9,26,27,28, 7,11,15,19,24,25,29,31, 3,4,13,17,21,22,30,0};
+ static int *table_sup[] =
+ {NULL, t360, t1200, t3in+5+8, t3in+5, t3in, t3in};
+
+ base_minor = (drive < 4) ? drive : (124 + drive);
+ if (UDP->cmos < NUMBER(default_drive_params)) {
+ i = 0;
+ do {
+ char name[16];
+
+ sprintf (name, "%d%s", drive, table[table_sup[UDP->cmos][i]]);
+ devfs_register (devfs_handle, name, DEVFS_FL_DEFAULT, MAJOR_NR,
+ base_minor + (table_sup[UDP->cmos][i] << 2),
+ S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP |S_IWGRP,
+ &floppy_fops, NULL);
+ } while (table_sup[UDP->cmos][i++]);
+ }
+}
+
+/*
+ * Floppy Driver initialization
+ * =============================
+ */
+
+static inline char __init get_fdc_version(void)
+{
+ return FDC_8272A;
+}
+
+/* lilo configuration */
+
+static void __init floppy_set_flags(int *ints,int param, int param2)
+{
+ int i;
+
+ for (i=0; i < ARRAY_SIZE(default_drive_params); i++){
+ if (param)
+ default_drive_params[i].params.flags |= param2;
+ else
+ default_drive_params[i].params.flags &= ~param2;
+ }
+ DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param);
+}
+
+static void __init daring(int *ints,int param, int param2)
+{
+ int i;
+
+ for (i=0; i < ARRAY_SIZE(default_drive_params); i++){
+ if (param){
+ default_drive_params[i].params.select_delay = 0;
+ default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR;
+ } else {
+ default_drive_params[i].params.select_delay = 2*HZ/100;
+ default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR;
+ }
+ }
+ DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken");
+}
+
+static void __init set_cmos(int *ints, int dummy, int dummy2)
+{
+ int current_drive=0;
+
+ if (ints[0] != 2){
+ DPRINT("wrong number of parameters for CMOS\n");
+ return;
+ }
+ current_drive = ints[1];
+ if (current_drive < 0 || current_drive >= 8){
+ DPRINT("bad drive for set_cmos\n");
+ return;
+ }
+#if N_FDC > 1
+ if (current_drive >= 4 && !FDC2)
+ FDC2 = 0x370;
+#endif
+ DP->cmos = ints[2];
+ DPRINT("setting CMOS code to %d\n", ints[2]);
+}
+
+static struct param_table {
+ const char *name;
+ void (*fn)(int *ints, int param, int param2);
+ int *var;
+ int def_param;
+ int param2;
+} config_params[]={
+ { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff, 0}, /* obsolete */
+ { "all_drives", 0, &allowed_drive_mask, 0xff, 0 }, /* obsolete */
+ { "irq", 0, &FLOPPY_IRQ, DEFAULT_FLOPPY_IRQ, 0 },
+ { "dma", 0, &FLOPPY_DMA, DEFAULT_FLOPPY_DMA, 0 },
+
+ { "daring", daring, 0, 1, 0},
+#if N_FDC > 1
+ { "two_fdc", 0, &FDC2, 0x370, 0 },
+ { "one_fdc", 0, &FDC2, 0, 0 },
+#endif
+ { "broken_dcl", floppy_set_flags, 0, 1, FD_BROKEN_DCL },
+ { "messages", floppy_set_flags, 0, 1, FTD_MSG },
+ { "silent_dcl_clear", floppy_set_flags, 0, 1, FD_SILENT_DCL_CLEAR },
+ { "debug", floppy_set_flags, 0, 1, FD_DEBUG },
+
+ { "nodma", 0, &can_use_virtual_dma, 1, 0 },
+ { "yesdma", 0, &can_use_virtual_dma, 0, 0 },
+
+ { "fifo_depth", 0, &fifo_depth, 0xa, 0 },
+ { "nofifo", 0, &no_fifo, 0x20, 0 },
+ { "usefifo", 0, &no_fifo, 0, 0 },
+
+ { "cmos", set_cmos, 0, 0, 0 },
+ { "slow", 0, &slow_floppy, 1, 0 },
+
+ { "unexpected_interrupts", 0, &print_unex, 1, 0 },
+ { "no_unexpected_interrupts", 0, &print_unex, 0, 0 },
+
+ EXTRA_FLOPPY_PARAMS
+};
+
+static int __init floppy_setup(char *str)
+{
+ int i;
+ int param;
+ int ints[11];
+
+ str = get_options(str,ARRAY_SIZE(ints),ints);
+ if (str) {
+ for (i=0; i< ARRAY_SIZE(config_params); i++){
+ if (strcmp(str,config_params[i].name) == 0){
+ if (ints[0])
+ param = ints[1];
+ else
+ param = config_params[i].def_param;
+ if (config_params[i].fn)
+ config_params[i].
+ fn(ints,param,
+ config_params[i].param2);
+ if (config_params[i].var) {
+ DPRINT("%s=%d\n", str, param);
+ *config_params[i].var = param;
+ }
+ return 1;
+ }
+ }
+ }
+ if (str) {
+ DPRINT("unknown floppy option [%s]\n", str);
+
+ DPRINT("allowed options are:");
+ for (i=0; i< ARRAY_SIZE(config_params); i++)
+ printk(" %s",config_params[i].name);
+ printk("\n");
+ } else
+ DPRINT("botched floppy option\n");
+ DPRINT("Read linux/Documentation/floppy.txt\n");
+ return 0;
+}
+
+static int have_no_fdc= -ENODEV;
+
+static struct platform_device floppy_device = {
+ .name = "floppy",
+ .id = 0,
+ .dev = {
+ .name = "Floppy Drive",
+ },
+};
+
+static struct gendisk *floppy_find(dev_t dev, int *part, void *data)
+{
+ int drive = (*part&3) | ((*part&0x80) >> 5);
+ if (drive >= N_DRIVE ||
+ !(allowed_drive_mask & (1 << drive)) ||
+ fdc_state[FDC(drive)].version == FDC_NONE)
+ return NULL;
+ return get_disk(disks[drive]);
+}
+
+int __init floppy_init(void)
+{
+ int i,unit,drive;
+ int err;
+
+ raw_cmd = NULL;
+ FDC1 = 0x90;
+
+ for (i=0; i<N_DRIVE; i++) {
+ disks[i] = alloc_disk(1);
+ if (!disks[i])
+ goto Enomem;
+ }
+
+ devfs_handle = devfs_mk_dir (NULL, "floppy", NULL);
+ if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) {
+ printk("Unable to get major %d for floppy\n",MAJOR_NR);
+ err = -EBUSY;
+ goto out;
+ }
+
+ for (i=0; i<N_DRIVE; i++) {
+ disks[i]->major = MAJOR_NR;
+ disks[i]->first_minor = TOMINOR(i);
+ disks[i]->fops = &floppy_fops;
+ sprintf(disks[i]->disk_name, "fd%d", i);
+ }
+
+ blk_register_region(MKDEV(MAJOR_NR, 0), 256, THIS_MODULE,
+ floppy_find, NULL, NULL);
+
+ for (i=0; i<256; i++)
+ if (ITYPE(i))
+ floppy_sizes[i] = floppy_type[ITYPE(i)].size;
+ else
+ floppy_sizes[i] = MAX_DISK_SIZE << 1;
+
+ blk_init_queue(&floppy_queue, do_fd_request, &floppy_lock);
+ reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
+ config_types();
+
+ for (i = 0; i < N_FDC; i++) {
+ fdc = i;
+ CLEARSTRUCT(FDCS);
+ FDCS->dtr = -1;
+ FDCS->dor = 0;
+ }
+
+ if ((fd_inb(FD_MODE_CHANGE) & 1) == 0)
+ FDC1 = 0xc8;
+
+ use_virtual_dma = can_use_virtual_dma & 1;
+ fdc_state[0].address = FDC1;
+ if (fdc_state[0].address == -1) {
+ err = -ENODEV;
+ goto out1;
+ }
+#if N_FDC > 1
+ fdc_state[1].address = FDC2;
+#endif
+
+ fdc = 0; /* reset fdc in case of unexpected interrupt */
+ if (floppy_grab_irq_and_dma()){
+ err = -EBUSY;
+ goto out1;
+ }
+
+ /* initialise drive state */
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ CLEARSTRUCT(UDRS);
+ CLEARSTRUCT(UDRWE);
+ USETF(FD_DISK_NEWCHANGE);
+ USETF(FD_DISK_CHANGED);
+ USETF(FD_VERIFY);
+ UDRS->fd_device = -1;
+ floppy_track_buffer = NULL;
+ max_buffer_sectors = 0;
+ }
+
+ for (i = 0; i < N_FDC; i++) {
+ fdc = i;
+ FDCS->driver_version = FD_DRIVER_VERSION;
+ for (unit=0; unit<4; unit++)
+ FDCS->track[unit] = 0;
+ if (FDCS->address == -1)
+ continue;
+ FDCS->rawcmd = 2;
+ user_reset_fdc(-1, FD_RESET_ALWAYS, 0);
+
+ /* Try to determine the floppy controller type */
+ FDCS->version = get_fdc_version();
+ if (FDCS->version == FDC_NONE){
+ /* free ioports reserved by floppy_grab_irq_and_dma() */
+ release_region(FDCS->address, 1);
+ release_region(FDCS->address + 2, 1);
+ release_region(FDCS->address + 4, 1);
+ release_region(0xbe, 1);
+ release_region(0x4be, 1);
+ FDCS->address = -1;
+ continue;
+ }
+ if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A)
+ can_use_virtual_dma = 0;
+
+ have_no_fdc = 0;
+ /* Not all FDCs seem to be able to handle the version command
+ * properly, so force a reset for the standard FDC clones,
+ * to avoid interrupt garbage.
+ */
+ user_reset_fdc(-1,FD_RESET_ALWAYS,0);
+ }
+ fdc=0;
+ del_timer(&fd_timeout);
+ current_drive = 0;
+ floppy_release_irq_and_dma();
+#if 0 /* no message */
+ initialising=0;
+#endif
+ if (have_no_fdc) {
+ DPRINT("no floppy controllers found\n");
+ flush_scheduled_work();
+ if (usage_count)
+ floppy_release_irq_and_dma();
+ err = have_no_fdc;
+ goto out2;
+ }
+
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ init_timer(&motor_off_timer[drive]);
+ motor_off_timer[drive].data = drive;
+ motor_off_timer[drive].function = motor_off_callback;
+ if (!(allowed_drive_mask & (1 << drive)))
+ continue;
+ if (fdc_state[FDC(drive)].version == FDC_NONE)
+ continue;
+ /* to be cleaned up... */
+ disks[drive]->private_data = (void*)drive;
+ disks[drive]->queue = &floppy_queue;
+ add_disk(disks[drive]);
+ }
+
+ platform_device_register(&floppy_device);
+ return 0;
+
+out1:
+ del_timer(&fd_timeout);
+out2:
+ blk_unregister_region(MKDEV(MAJOR_NR, 0), 256);
+ unregister_blkdev(MAJOR_NR,"fd");
+ blk_cleanup_queue(&floppy_queue);
+out:
+ for (i=0; i<N_DRIVE; i++)
+ put_disk(disks[i]);
+ return err;
+
+Enomem:
+ while (i--)
+ put_disk(disks[i]);
+ return -ENOMEM;
+}
+
+static spinlock_t floppy_usage_lock = SPIN_LOCK_UNLOCKED;
+
+static int floppy_grab_irq_and_dma(void)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&floppy_usage_lock, flags);
+ if (usage_count++){
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ return 0;
+ }
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ MOD_INC_USE_COUNT;
+ if (fd_request_irq()) {
+ DPRINT("Unable to grab IRQ%d for the floppy driver\n",
+ FLOPPY_IRQ);
+ MOD_DEC_USE_COUNT;
+ spin_lock_irqsave(&floppy_usage_lock, flags);
+ usage_count--;
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ return -1;
+ }
+ if (fd_request_dma()) {
+ DPRINT("Unable to grab DMA%d for the floppy driver\n",
+ FLOPPY_DMA);
+ fd_free_irq();
+ MOD_DEC_USE_COUNT;
+ spin_lock_irqsave(&floppy_usage_lock, flags);
+ usage_count--;
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ return -1;
+ }
+
+ for (fdc=0; fdc< N_FDC; fdc++){
+ if (FDCS->address != -1){
+ static char floppy[] = "floppy";
+ if (!request_region(FDCS->address, 1, floppy))
+ goto cleanup0;
+
+ if (!request_region(FDCS->address + 2, 1, floppy)) {
+ release_region(FDCS->address, 1);
+ goto cleanup0;
+ }
+
+ if (!request_region(FDCS->address + 4, 1, floppy)) {
+ release_region(FDCS->address, 1);
+ release_region(FDCS->address + 2, 1);
+ goto cleanup0;
+ }
+
+ if (fdc == 0) { /* internal FDC */
+ if (request_region(0xbe, 1, "floppy mode change")) {
+ if (request_region(0x4be, 1, "floppy ex. mode change"))
+ continue;
+ else
+ DPRINT("Floppy io-port 0x4be in use\n");
+
+ release_region(0xbe, 1);
+ } else
+ DPRINT("Floppy io-port 0xbe in use\n");
+
+ release_region(FDCS->address, 1);
+ release_region(FDCS->address + 2, 1);
+ release_region(FDCS->address + 4, 1);
+ }
+
+ goto cleanup1;
+ }
+ }
+ for (fdc=0; fdc< N_FDC; fdc++){
+ if (FDCS->address != -1){
+ reset_fdc_info(1);
+ fd_outb(FDCS->dor, FD_MODE);
+ }
+ }
+ fdc = 0;
+ fd_outb((FDCS->dor & 8), FD_MODE);
+
+ for (fdc = 0; fdc < N_FDC; fdc++)
+ if (FDCS->address != -1)
+ fd_outb(FDCS->dor, FD_MODE);
+ /*
+ * The driver will try and free resources and relies on us
+ * to know if they were allocated or not.
+ */
+ fdc = 0;
+ irqdma_allocated = 1;
+ return 0;
+
+cleanup0:
+ DPRINT("Floppy io-port 0x%04lx in use\n", FDCS->address);
+cleanup1:
+ fd_free_irq();
+ fd_free_dma();
+ while(--fdc >= 0) {
+ release_region(FDCS->address, 1);
+ release_region(FDCS->address + 2, 1);
+ release_region(FDCS->address + 4, 1);
+ if (fdc == 0) {
+ release_region(0x00be, 1);
+ release_region(0x04be, 1);
+ }
+ }
+ MOD_DEC_USE_COUNT;
+ spin_lock_irqsave(&floppy_usage_lock, flags);
+ usage_count--;
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ return -1;
+}
+
+static void floppy_release_irq_and_dma(void)
+{
+ int old_fdc;
+#ifdef FLOPPY_SANITY_CHECK
+ int drive;
+#endif
+ long tmpsize;
+ unsigned long tmpaddr;
+ unsigned long flags;
+
+ spin_lock_irqsave(&floppy_usage_lock, flags);
+ if (--usage_count){
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ return;
+ }
+ spin_unlock_irqrestore(&floppy_usage_lock, flags);
+ if(irqdma_allocated)
+ {
+ fd_disable_dma();
+ fd_free_dma();
+ fd_free_irq();
+ irqdma_allocated=0;
+ }
+ fd_outb(0, FD_MODE);
+ floppy_enable_hlt();
+
+ if (floppy_track_buffer && max_buffer_sectors) {
+ tmpsize = max_buffer_sectors*1024;
+ tmpaddr = (unsigned long)floppy_track_buffer;
+ floppy_track_buffer = NULL;
+ max_buffer_sectors = 0;
+ buffer_min = buffer_max = -1;
+ fd_dma_mem_free(tmpaddr, tmpsize);
+ }
+
+#ifdef FLOPPY_SANITY_CHECK
+ for (drive=0; drive < N_FDC * 4; drive++)
+ if (timer_pending(motor_off_timer + drive))
+ printk("motor off timer %d still active\n", drive);
+
+ if (timer_pending(&fd_timeout))
+ printk("floppy timer still active:%s\n", timeout_message);
+ if (timer_pending(&fd_timer))
+ printk("auxiliary floppy timer still active\n");
+ if (floppy_work.pending)
+ printk("work still pending\n");
+#endif
+ old_fdc = fdc;
+ for (fdc = 0; fdc < N_FDC; fdc++)
+ if (FDCS->address != -1) {
+ release_region(FDCS->address, 1);
+ release_region(FDCS->address + 2, 1);
+ release_region(FDCS->address + 4, 1);
+ if (fdc == 0) {
+ release_region(0xbe, 1);
+ release_region(0x4be, 1);
+ }
+ }
+ fdc = old_fdc;
+ MOD_DEC_USE_COUNT;
+}
+
+
+#ifdef MODULE
+
+char *floppy;
+
+static void __init parse_floppy_cfg_string(char *cfg)
+{
+ char *ptr;
+
+ while(*cfg) {
+ for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++);
+ if (*cfg) {
+ *cfg = '\0';
+ cfg++;
+ }
+ if (*ptr)
+ floppy_setup(ptr);
+ }
+}
+
+int init_module(void)
+{
+ printk(KERN_INFO "inserting floppy driver for " UTS_RELEASE "\n");
+
+ if (floppy)
+ parse_floppy_cfg_string(floppy);
+ return floppy_init();
+}
+
+void cleanup_module(void)
+{
+ int drive;
+
+ platform_device_unregister(&floppy_device);
+ devfs_unregister (devfs_handle);
+ blk_unregister_region(MKDEV(MAJOR_NR, 0), 256);
+ unregister_blkdev(MAJOR_NR, "fd");
+ for (drive = 0; drive < N_DRIVE; drive++) {
+ if ((allowed_drive_mask & (1 << drive)) &&
+ fdc_state[FDC(drive)].version != FDC_NONE)
+ del_gendisk(disks[drive]);
+ put_disk(disks[drive]);
+ }
+
+ blk_cleanup_queue(&floppy_queue);
+ /* eject disk, if any */
+ fd_eject(0);
+}
+
+MODULE_PARM(floppy,"s");
+MODULE_PARM(FLOPPY_IRQ,"i");
+MODULE_PARM(FLOPPY_DMA,"i");
+MODULE_AUTHOR("Osamu Tomita");
+MODULE_SUPPORTED_DEVICE("fd");
+MODULE_LICENSE("GPL");
+
+#else
+
+__setup ("floppy=", floppy_setup);
+module_init(floppy_init)
+#endif
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