/* * IDE ATAPI floppy driver. * * Copyright (C) 1996-1999 Gadi Oxman * Copyright (C) 2000-2002 Paul Bristow * Copyright (C) 2005 Bartlomiej Zolnierkiewicz * * This driver supports the following IDE floppy drives: * * LS-120/240 SuperDisk * Iomega Zip 100/250 * Iomega PC Card Clik!/PocketZip * * For a historical changelog see * Documentation/ide/ChangeLog.ide-floppy.1996-2002 */ #define DRV_NAME "ide-floppy" #define IDEFLOPPY_VERSION "1.00" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ide-floppy.h" /* define to see debug info */ #define IDEFLOPPY_DEBUG_LOG 0 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ #define IDEFLOPPY_DEBUG(fmt, args...) #if IDEFLOPPY_DEBUG_LOG #define debug_log(fmt, args...) \ printk(KERN_INFO "ide-floppy: " fmt, ## args) #else #define debug_log(fmt, args...) do {} while (0) #endif /* * After each failed packet command we issue a request sense command and retry * the packet command IDEFLOPPY_MAX_PC_RETRIES times. */ #define IDEFLOPPY_MAX_PC_RETRIES 3 /* format capacities descriptor codes */ #define CAPACITY_INVALID 0x00 #define CAPACITY_UNFORMATTED 0x01 #define CAPACITY_CURRENT 0x02 #define CAPACITY_NO_CARTRIDGE 0x03 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ /* Error code returned in rq->errors to the higher part of the driver. */ #define IDEFLOPPY_ERROR_GENERAL 101 static DEFINE_MUTEX(idefloppy_ref_mutex); #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) #define ide_floppy_g(disk) \ container_of((disk)->private_data, struct ide_floppy_obj, driver) static void idefloppy_cleanup_obj(struct kref *); static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) { struct ide_floppy_obj *floppy = NULL; mutex_lock(&idefloppy_ref_mutex); floppy = ide_floppy_g(disk); if (floppy) { if (ide_device_get(floppy->drive)) floppy = NULL; else kref_get(&floppy->kref); } mutex_unlock(&idefloppy_ref_mutex); return floppy; } static void ide_floppy_put(struct ide_floppy_obj *floppy) { ide_drive_t *drive = floppy->drive; mutex_lock(&idefloppy_ref_mutex); kref_put(&floppy->kref, idefloppy_cleanup_obj); ide_device_put(drive); mutex_unlock(&idefloppy_ref_mutex); } /* * Used to finish servicing a request. For read/write requests, we will call * ide_end_request to pass to the next buffer. */ static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) { idefloppy_floppy_t *floppy = drive->driver_data; struct request *rq = HWGROUP(drive)->rq; int error; debug_log("Reached %s\n", __func__); switch (uptodate) { case 0: error = IDEFLOPPY_ERROR_GENERAL; break; case 1: error = 0; break; default: error = uptodate; } if (error) floppy->failed_pc = NULL; /* Why does this happen? */ if (!rq) return 0; if (!blk_special_request(rq)) { /* our real local end request function */ ide_end_request(drive, uptodate, nsecs); return 0; } rq->errors = error; /* fixme: need to move this local also */ ide_end_drive_cmd(drive, 0, 0); return 0; } static void idefloppy_update_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc) { struct request *rq = pc->rq; struct bio *bio = rq->bio; while ((bio = rq->bio) != NULL) idefloppy_end_request(drive, 1, 0); } static void ide_floppy_callback(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct ide_atapi_pc *pc = floppy->pc; int uptodate = pc->error ? 0 : 1; debug_log("Reached %s\n", __func__); if (floppy->failed_pc == pc) floppy->failed_pc = NULL; if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || (pc->rq && blk_pc_request(pc->rq))) uptodate = 1; /* FIXME */ else if (pc->c[0] == GPCMD_REQUEST_SENSE) { u8 *buf = floppy->pc->buf; if (!pc->error) { floppy->sense_key = buf[2] & 0x0F; floppy->asc = buf[12]; floppy->ascq = buf[13]; floppy->progress_indication = buf[15] & 0x80 ? (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; if (floppy->failed_pc) debug_log("pc = %x, ", floppy->failed_pc->c[0]); debug_log("sense key = %x, asc = %x, ascq = %x\n", floppy->sense_key, floppy->asc, floppy->ascq); } else printk(KERN_ERR "Error in REQUEST SENSE itself - " "Aborting request!\n"); } idefloppy_end_request(drive, uptodate, 0); } void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc) { ide_init_pc(pc); pc->c[0] = GPCMD_REQUEST_SENSE; pc->c[4] = 255; pc->req_xfer = 18; } /* * Called when an error was detected during the last packet command. We queue a * request sense packet command in the head of the request list. */ static void idefloppy_retry_pc(ide_drive_t *drive) { struct ide_floppy_obj *floppy = drive->driver_data; struct request *rq = &floppy->request_sense_rq; struct ide_atapi_pc *pc = &floppy->request_sense_pc; (void)ide_read_error(drive); ide_floppy_create_request_sense_cmd(pc); ide_queue_pc_head(drive, floppy->disk, pc, rq); } /* The usual interrupt handler called during a packet command. */ static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr, WAIT_FLOPPY_CMD, NULL, idefloppy_update_buffers, idefloppy_retry_pc, NULL, ide_io_buffers); } /* * What we have here is a classic case of a top half / bottom half interrupt * service routine. In interrupt mode, the device sends an interrupt to signal * that it is ready to receive a packet. However, we need to delay about 2-3 * ticks before issuing the packet or we gets in trouble. */ static int idefloppy_transfer_pc(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; /* Send the actual packet */ drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12); /* Timeout for the packet command */ return WAIT_FLOPPY_CMD; } /* * Called as an interrupt (or directly). When the device says it's ready for a * packet, we schedule the packet transfer to occur about 2-3 ticks later in * transfer_pc. */ static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct ide_atapi_pc *pc = floppy->pc; ide_expiry_t *expiry; unsigned int timeout; /* * The following delay solves a problem with ATAPI Zip 100 drives * where the Busy flag was apparently being deasserted before the * unit was ready to receive data. This was happening on a * 1200 MHz Athlon system. 10/26/01 25msec is too short, * 40 and 50msec work well. idefloppy_pc_intr will not be actually * used until after the packet is moved in about 50 msec. */ if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { timeout = floppy->ticks; expiry = &idefloppy_transfer_pc; } else { timeout = WAIT_FLOPPY_CMD; expiry = NULL; } return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry); } static void ide_floppy_report_error(idefloppy_floppy_t *floppy, struct ide_atapi_pc *pc) { /* supress error messages resulting from Medium not present */ if (floppy->sense_key == 0x02 && floppy->asc == 0x3a && floppy->ascq == 0x00) return; printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " "asc = %2x, ascq = %2x\n", floppy->drive->name, pc->c[0], floppy->sense_key, floppy->asc, floppy->ascq); } static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, struct ide_atapi_pc *pc) { idefloppy_floppy_t *floppy = drive->driver_data; if (floppy->failed_pc == NULL && pc->c[0] != GPCMD_REQUEST_SENSE) floppy->failed_pc = pc; /* Set the current packet command */ floppy->pc = pc; if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) ide_floppy_report_error(floppy, pc); /* Giving up */ pc->error = IDEFLOPPY_ERROR_GENERAL; floppy->failed_pc = NULL; drive->pc_callback(drive); return ide_stopped; } debug_log("Retry number - %d\n", pc->retries); pc->retries++; return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer, WAIT_FLOPPY_CMD, NULL); } void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) { ide_init_pc(pc); pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; pc->c[7] = 255; pc->c[8] = 255; pc->req_xfer = 255; } /* A mode sense command is used to "sense" floppy parameters. */ void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code) { u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ ide_init_pc(pc); pc->c[0] = GPCMD_MODE_SENSE_10; pc->c[1] = 0; pc->c[2] = page_code; switch (page_code) { case IDEFLOPPY_CAPABILITIES_PAGE: length += 12; break; case IDEFLOPPY_FLEXIBLE_DISK_PAGE: length += 32; break; default: printk(KERN_ERR "ide-floppy: unsupported page code " "in create_mode_sense_cmd\n"); } put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); pc->req_xfer = length; } static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, struct ide_atapi_pc *pc, struct request *rq, unsigned long sector) { int block = sector / floppy->bs_factor; int blocks = rq->nr_sectors / floppy->bs_factor; int cmd = rq_data_dir(rq); debug_log("create_rw10_cmd: block == %d, blocks == %d\n", block, blocks); ide_init_pc(pc); pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); memcpy(rq->cmd, pc->c, 12); pc->rq = rq; pc->b_count = 0; if (rq->cmd_flags & REQ_RW) pc->flags |= PC_FLAG_WRITING; pc->buf = NULL; pc->req_xfer = pc->buf_size = blocks * floppy->block_size; pc->flags |= PC_FLAG_DMA_OK; } static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, struct ide_atapi_pc *pc, struct request *rq) { ide_init_pc(pc); memcpy(pc->c, rq->cmd, sizeof(pc->c)); pc->rq = rq; pc->b_count = 0; if (rq->data_len && rq_data_dir(rq) == WRITE) pc->flags |= PC_FLAG_WRITING; pc->buf = rq->data; if (rq->bio) pc->flags |= PC_FLAG_DMA_OK; /* * possibly problematic, doesn't look like ide-floppy correctly * handled scattered requests if dma fails... */ pc->req_xfer = pc->buf_size = rq->data_len; } static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, struct request *rq, sector_t block_s) { idefloppy_floppy_t *floppy = drive->driver_data; ide_hwif_t *hwif = drive->hwif; struct ide_atapi_pc *pc; unsigned long block = (unsigned long)block_s; debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n", __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?", rq->cmd[0], rq->cmd_type, rq->errors); debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n", __func__, (long)rq->sector, rq->nr_sectors, rq->current_nr_sectors); if (rq->errors >= ERROR_MAX) { if (floppy->failed_pc) ide_floppy_report_error(floppy, floppy->failed_pc); else printk(KERN_ERR "ide-floppy: %s: I/O error\n", drive->name); idefloppy_end_request(drive, 0, 0); return ide_stopped; } if (blk_fs_request(rq)) { if (((long)rq->sector % floppy->bs_factor) || (rq->nr_sectors % floppy->bs_factor)) { printk(KERN_ERR "%s: unsupported r/w request size\n", drive->name); idefloppy_end_request(drive, 0, 0); return ide_stopped; } pc = &floppy->queued_pc; idefloppy_create_rw_cmd(floppy, pc, rq, block); } else if (blk_special_request(rq)) { pc = (struct ide_atapi_pc *) rq->buffer; } else if (blk_pc_request(rq)) { pc = &floppy->queued_pc; idefloppy_blockpc_cmd(floppy, pc, rq); } else { blk_dump_rq_flags(rq, "ide-floppy: unsupported command in queue"); idefloppy_end_request(drive, 0, 0); return ide_stopped; } ide_init_sg_cmd(drive, rq); ide_map_sg(drive, rq); pc->sg = hwif->sg_table; pc->sg_cnt = hwif->sg_nents; pc->rq = rq; return idefloppy_issue_pc(drive, pc); } /* * Look at the flexible disk page parameters. We ignore the CHS capacity * parameters and use the LBA parameters instead. */ static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *disk = floppy->disk; struct ide_atapi_pc pc; u8 *page; int capacity, lba_capacity; u16 transfer_rate, sector_size, cyls, rpm; u8 heads, sectors; ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE); if (ide_queue_pc_tail(drive, disk, &pc)) { printk(KERN_ERR "ide-floppy: Can't get flexible disk page" " parameters\n"); return 1; } if (pc.buf[3] & 0x80) drive->atapi_flags |= IDE_AFLAG_WP; else drive->atapi_flags &= ~IDE_AFLAG_WP; set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP)); page = &pc.buf[8]; transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]); sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]); cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]); rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]); heads = pc.buf[8 + 4]; sectors = pc.buf[8 + 5]; capacity = cyls * heads * sectors * sector_size; if (memcmp(page, &floppy->flexible_disk_page, 32)) printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " "%d sector size, %d rpm\n", drive->name, capacity / 1024, cyls, heads, sectors, transfer_rate / 8, sector_size, rpm); memcpy(&floppy->flexible_disk_page, page, 32); drive->bios_cyl = cyls; drive->bios_head = heads; drive->bios_sect = sectors; lba_capacity = floppy->blocks * floppy->block_size; if (capacity < lba_capacity) { printk(KERN_NOTICE "%s: The disk reports a capacity of %d " "bytes, but the drive only handles %d\n", drive->name, lba_capacity, capacity); floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; } return 0; } /* * Determine if a media is present in the floppy drive, and if so, its LBA * capacity. */ static int ide_floppy_get_capacity(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *disk = floppy->disk; struct ide_atapi_pc pc; u8 *cap_desc; u8 header_len, desc_cnt; int i, rc = 1, blocks, length; drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; floppy->blocks = 0; floppy->bs_factor = 1; set_capacity(floppy->disk, 0); ide_floppy_create_read_capacity_cmd(&pc); if (ide_queue_pc_tail(drive, disk, &pc)) { printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); return 1; } header_len = pc.buf[3]; cap_desc = &pc.buf[4]; desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ for (i = 0; i < desc_cnt; i++) { unsigned int desc_start = 4 + i*8; blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", i, blocks * length / 1024, blocks, length); if (i) continue; /* * the code below is valid only for the 1st descriptor, ie i=0 */ switch (pc.buf[desc_start + 4] & 0x03) { /* Clik! drive returns this instead of CAPACITY_CURRENT */ case CAPACITY_UNFORMATTED: if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) /* * If it is not a clik drive, break out * (maintains previous driver behaviour) */ break; case CAPACITY_CURRENT: /* Normal Zip/LS-120 disks */ if (memcmp(cap_desc, &floppy->cap_desc, 8)) printk(KERN_INFO "%s: %dkB, %d blocks, %d " "sector size\n", drive->name, blocks * length / 1024, blocks, length); memcpy(&floppy->cap_desc, cap_desc, 8); if (!length || length % 512) { printk(KERN_NOTICE "%s: %d bytes block size " "not supported\n", drive->name, length); } else { floppy->blocks = blocks; floppy->block_size = length; floppy->bs_factor = length / 512; if (floppy->bs_factor != 1) printk(KERN_NOTICE "%s: warning: non " "512 bytes block size not " "fully supported\n", drive->name); rc = 0; } break; case CAPACITY_NO_CARTRIDGE: /* * This is a KERN_ERR so it appears on screen * for the user to see */ printk(KERN_ERR "%s: No disk in drive\n", drive->name); break; case CAPACITY_INVALID: printk(KERN_ERR "%s: Invalid capacity for disk " "in drive\n", drive->name); break; } debug_log("Descriptor 0 Code: %d\n", pc.buf[desc_start + 4] & 0x03); } /* Clik! disk does not support get_flexible_disk_page */ if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) (void) ide_floppy_get_flexible_disk_page(drive); set_capacity(disk, floppy->blocks * floppy->bs_factor); return rc; } static sector_t idefloppy_capacity(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; unsigned long capacity = floppy->blocks * floppy->bs_factor; return capacity; } #ifdef CONFIG_IDE_PROC_FS ide_devset_rw(bios_cyl, 0, 1023, bios_cyl); ide_devset_rw(bios_head, 0, 255, bios_head); ide_devset_rw(bios_sect, 0, 63, bios_sect); static int get_ticks(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; return floppy->ticks; } static int set_ticks(ide_drive_t *drive, int arg) { idefloppy_floppy_t *floppy = drive->driver_data; floppy->ticks = arg; return 0; } IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks); static const struct ide_devset *idefloppy_settings[] = { &ide_devset_bios_cyl, &ide_devset_bios_head, &ide_devset_bios_sect, &ide_devset_ticks, NULL }; #endif static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) { u16 *id = drive->id; u8 gcw[2]; *((u16 *)&gcw) = id[ATA_ID_CONFIG]; drive->pc_callback = ide_floppy_callback; if (((gcw[0] & 0x60) >> 5) == 1) drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; /* * We used to check revisions here. At this point however I'm giving up. * Just assume they are all broken, its easier. * * The actual reason for the workarounds was likely a driver bug after * all rather than a firmware bug, and the workaround below used to hide * it. It should be fixed as of version 1.9, but to be on the safe side * we'll leave the limitation below for the 2.2.x tree. */ if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; /* This value will be visible in the /proc/ide/hdx/settings */ floppy->ticks = IDEFLOPPY_TICKS_DELAY; blk_queue_max_sectors(drive->queue, 64); } /* * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes * nasty clicking noises without it, so please don't remove this. */ if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { blk_queue_max_sectors(drive->queue, 64); drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; /* IOMEGA Clik! drives do not support lock/unlock commands */ drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; } (void) ide_floppy_get_capacity(drive); ide_proc_register_driver(drive, floppy->driver); } static void ide_floppy_remove(ide_drive_t *drive) { idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *g = floppy->disk; ide_proc_unregister_driver(drive, floppy->driver); del_gendisk(g); ide_floppy_put(floppy); } static void idefloppy_cleanup_obj(struct kref *kref) { struct ide_floppy_obj *floppy = to_ide_floppy(kref); ide_drive_t *drive = floppy->drive; struct gendisk *g = floppy->disk; drive->driver_data = NULL; g->private_data = NULL; put_disk(g); kfree(floppy); } #ifdef CONFIG_IDE_PROC_FS static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, int count, int *eof, void *data) { ide_drive_t*drive = (ide_drive_t *)data; int len; len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); PROC_IDE_READ_RETURN(page, start, off, count, eof, len); } static ide_proc_entry_t idefloppy_proc[] = { { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, { NULL, 0, NULL, NULL } }; #endif /* CONFIG_IDE_PROC_FS */ static int ide_floppy_probe(ide_drive_t *); static ide_driver_t idefloppy_driver = { .gen_driver = { .owner = THIS_MODULE, .name = "ide-floppy", .bus = &ide_bus_type, }, .probe = ide_floppy_probe, .remove = ide_floppy_remove, .version = IDEFLOPPY_VERSION, .media = ide_floppy, .do_request = idefloppy_do_request, .end_request = idefloppy_end_request, .error = __ide_error, #ifdef CONFIG_IDE_PROC_FS .proc = idefloppy_proc, .settings = idefloppy_settings, #endif }; static int idefloppy_open(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_floppy_obj *floppy; ide_drive_t *drive; int ret = 0; debug_log("Reached %s\n", __func__); floppy = ide_floppy_get(disk); if (!floppy) return -ENXIO; drive = floppy->drive; floppy->openers++; if (floppy->openers == 1) { drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; /* Just in case */ if (ide_do_test_unit_ready(drive, disk)) ide_do_start_stop(drive, disk, 1); if (ide_floppy_get_capacity(drive) && (filp->f_flags & O_NDELAY) == 0 /* * Allow O_NDELAY to open a drive without a disk, or with an * unreadable disk, so that we can get the format capacity * of the drive or begin the format - Sam */ ) { ret = -EIO; goto out_put_floppy; } if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) { ret = -EROFS; goto out_put_floppy; } drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; ide_set_media_lock(drive, disk, 1); check_disk_change(inode->i_bdev); } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) { ret = -EBUSY; goto out_put_floppy; } return 0; out_put_floppy: floppy->openers--; ide_floppy_put(floppy); return ret; } static int idefloppy_release(struct inode *inode, struct file *filp) { struct gendisk *disk = inode->i_bdev->bd_disk; struct ide_floppy_obj *floppy = ide_floppy_g(disk); ide_drive_t *drive = floppy->drive; debug_log("Reached %s\n", __func__); if (floppy->openers == 1) { ide_set_media_lock(drive, disk, 0); drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; } floppy->openers--; ide_floppy_put(floppy); return 0; } static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) { struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); ide_drive_t *drive = floppy->drive; geo->heads = drive->bios_head; geo->sectors = drive->bios_sect; geo->cylinders = (u16)drive->bios_cyl; /* truncate */ return 0; } static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd) { idefloppy_floppy_t *floppy = drive->driver_data; struct gendisk *disk = floppy->disk; int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; if (floppy->openers > 1) return -EBUSY; ide_set_media_lock(drive, disk, prevent); if (cmd == CDROMEJECT) ide_do_start_stop(drive, disk, 2); return 0; } static int idefloppy_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct block_device *bdev = inode->i_bdev; struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); ide_drive_t *drive = floppy->drive; struct ide_atapi_pc pc; void __user *argp = (void __user *)arg; int err; if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) return ide_floppy_lockdoor(drive, &pc, arg, cmd); err = ide_floppy_format_ioctl(drive, file, cmd, argp); if (err != -ENOTTY) return err; /* * skip SCSI_IOCTL_SEND_COMMAND (deprecated) * and CDROM_SEND_PACKET (legacy) ioctls */ if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, bdev->bd_disk, cmd, argp); if (err == -ENOTTY) err = generic_ide_ioctl(drive, file, bdev, cmd, arg); return err; } static int idefloppy_media_changed(struct gendisk *disk) { struct ide_floppy_obj *floppy = ide_floppy_g(disk); ide_drive_t *drive = floppy->drive; int ret; /* do not scan partitions twice if this is a removable device */ if (drive->attach) { drive->attach = 0; return 0; } ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED); drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED; return ret; } static int idefloppy_revalidate_disk(struct gendisk *disk) { struct ide_floppy_obj *floppy = ide_floppy_g(disk); set_capacity(disk, idefloppy_capacity(floppy->drive)); return 0; } static struct block_device_operations idefloppy_ops = { .owner = THIS_MODULE, .open = idefloppy_open, .release = idefloppy_release, .ioctl = idefloppy_ioctl, .getgeo = idefloppy_getgeo, .media_changed = idefloppy_media_changed, .revalidate_disk = idefloppy_revalidate_disk }; static int ide_floppy_probe(ide_drive_t *drive) { idefloppy_floppy_t *floppy; struct gendisk *g; if (!strstr("ide-floppy", drive->driver_req)) goto failed; if (drive->media != ide_floppy) goto failed; if (!ide_check_atapi_device(drive, DRV_NAME)) { printk(KERN_ERR "ide-floppy: %s: not supported by this version" " of ide-floppy\n", drive->name); goto failed; } floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); if (!floppy) { printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" " structure\n", drive->name); goto failed; } g = alloc_disk(1 << PARTN_BITS); if (!g) goto out_free_floppy; ide_init_disk(g, drive); kref_init(&floppy->kref); floppy->drive = drive; floppy->driver = &idefloppy_driver; floppy->disk = g; g->private_data = &floppy->driver; drive->driver_data = floppy; idefloppy_setup(drive, floppy); g->minors = 1 << PARTN_BITS; g->driverfs_dev = &drive->gendev; g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; g->fops = &idefloppy_ops; drive->attach = 1; add_disk(g); return 0; out_free_floppy: kfree(floppy); failed: return -ENODEV; } static void __exit idefloppy_exit(void) { driver_unregister(&idefloppy_driver.gen_driver); } static int __init idefloppy_init(void) { printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); return driver_register(&idefloppy_driver.gen_driver); } MODULE_ALIAS("ide:*m-floppy*"); MODULE_ALIAS("ide-floppy"); module_init(idefloppy_init); module_exit(idefloppy_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("ATAPI FLOPPY Driver");