/* * IDE ATAPI floppy driver. * * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net> * 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 */ #include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/delay.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/major.h> #include <linux/errno.h> #include <linux/genhd.h> #include <linux/cdrom.h> #include <linux/ide.h> #include <linux/hdreg.h> #include <linux/bitops.h> #include <linux/mutex.h> #include <linux/scatterlist.h> #include <scsi/scsi_ioctl.h> #include <asm/byteorder.h> #include <linux/uaccess.h> #include <linux/io.h> #include <asm/unaligned.h> #include "ide-floppy.h" /* * 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 /* * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit * was apparently being deasserted before the unit was ready to receive data. */ #define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */ static int ide_floppy_callback(ide_drive_t *drive, int dsc) { struct ide_disk_obj *floppy = drive->driver_data; struct ide_atapi_pc *pc = drive->pc; struct request *rq = pc->rq; int uptodate = pc->error ? 0 : 1; ide_debug_log(IDE_DBG_FUNC, "enter"); if (drive->failed_pc == pc) drive->failed_pc = NULL; if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || rq->cmd_type == REQ_TYPE_BLOCK_PC) uptodate = 1; /* FIXME */ else if (pc->c[0] == GPCMD_REQUEST_SENSE) { u8 *buf = bio_data(rq->bio); 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 (drive->failed_pc) ide_debug_log(IDE_DBG_PC, "pc = %x", drive->failed_pc->c[0]); ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x," "ascq = %x", floppy->sense_key, floppy->asc, floppy->ascq); } else printk(KERN_ERR PFX "Error in REQUEST SENSE itself - " "Aborting request!\n"); } if (rq->cmd_type == REQ_TYPE_SPECIAL) rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL; return uptodate; } static void ide_floppy_report_error(struct ide_disk_obj *floppy, struct ide_atapi_pc *pc) { /* suppress error messages resulting from Medium not present */ if (floppy->sense_key == 0x02 && floppy->asc == 0x3a && floppy->ascq == 0x00) return; printk(KERN_ERR PFX "%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 ide_floppy_issue_pc(ide_drive_t *drive, struct ide_cmd *cmd, struct ide_atapi_pc *pc) { struct ide_disk_obj *floppy = drive->driver_data; if (drive->failed_pc == NULL && pc->c[0] != GPCMD_REQUEST_SENSE) drive->failed_pc = pc; /* Set the current packet command */ drive->pc = pc; if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { unsigned int done = blk_rq_bytes(drive->hwif->rq); if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) ide_floppy_report_error(floppy, pc); /* Giving up */ pc->error = IDE_DRV_ERROR_GENERAL; drive->failed_pc = NULL; drive->pc_callback(drive, 0); ide_complete_rq(drive, -EIO, done); return ide_stopped; } ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries); pc->retries++; return ide_issue_pc(drive, cmd); } 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 PFX "unsupported page code in %s\n", __func__); } put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); pc->req_xfer = length; } static void idefloppy_create_rw_cmd(ide_drive_t *drive, struct ide_atapi_pc *pc, struct request *rq, unsigned long sector) { struct ide_disk_obj *floppy = drive->driver_data; int block = sector / floppy->bs_factor; int blocks = blk_rq_sectors(rq) / floppy->bs_factor; int cmd = rq_data_dir(rq); ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", 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; if (rq->cmd_flags & REQ_WRITE) pc->flags |= PC_FLAG_WRITING; pc->flags |= PC_FLAG_DMA_OK; } static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy, struct ide_atapi_pc *pc, struct request *rq) { ide_init_pc(pc); memcpy(pc->c, rq->cmd, sizeof(pc->c)); pc->rq = rq; if (blk_rq_bytes(rq)) { pc->flags |= PC_FLAG_DMA_OK; if (rq_data_dir(rq) == WRITE) pc->flags |= PC_FLAG_WRITING; } } static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive, struct request *rq, sector_t block) { struct ide_disk_obj *floppy = drive->driver_data; struct ide_cmd cmd; struct ide_atapi_pc *pc; ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]); if (drive->debug_mask & IDE_DBG_RQ) blk_dump_rq_flags(rq, (rq->rq_disk ? rq->rq_disk->disk_name : "dev?")); if (rq->errors >= ERROR_MAX) { if (drive->failed_pc) { ide_floppy_report_error(floppy, drive->failed_pc); drive->failed_pc = NULL; } else printk(KERN_ERR PFX "%s: I/O error\n", drive->name); if (rq->cmd_type == REQ_TYPE_SPECIAL) { rq->errors = 0; ide_complete_rq(drive, 0, blk_rq_bytes(rq)); return ide_stopped; } else goto out_end; } switch (rq->cmd_type) { case REQ_TYPE_FS: if (((long)blk_rq_pos(rq) % floppy->bs_factor) || (blk_rq_sectors(rq) % floppy->bs_factor)) { printk(KERN_ERR PFX "%s: unsupported r/w rq size\n", drive->name); goto out_end; } pc = &floppy->queued_pc; idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block); break; case REQ_TYPE_SPECIAL: case REQ_TYPE_SENSE: pc = (struct ide_atapi_pc *)rq->special; break; case REQ_TYPE_BLOCK_PC: pc = &floppy->queued_pc; idefloppy_blockpc_cmd(floppy, pc, rq); break; default: BUG(); } ide_prep_sense(drive, rq); memset(&cmd, 0, sizeof(cmd)); if (rq_data_dir(rq)) cmd.tf_flags |= IDE_TFLAG_WRITE; cmd.rq = rq; if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) { ide_init_sg_cmd(&cmd, blk_rq_bytes(rq)); ide_map_sg(drive, &cmd); } pc->rq = rq; return ide_floppy_issue_pc(drive, &cmd, pc); out_end: drive->failed_pc = NULL; if (rq->cmd_type != REQ_TYPE_FS && rq->errors == 0) rq->errors = -EIO; ide_complete_rq(drive, -EIO, blk_rq_bytes(rq)); return ide_stopped; } /* * 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, struct ide_atapi_pc *pc) { struct ide_disk_obj *floppy = drive->driver_data; struct gendisk *disk = floppy->disk; u8 *page, buf[40]; 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, buf, pc->req_xfer)) { printk(KERN_ERR PFX "Can't get flexible disk page params\n"); return 1; } if (buf[3] & 0x80) drive->dev_flags |= IDE_DFLAG_WP; else drive->dev_flags &= ~IDE_DFLAG_WP; set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP)); page = &buf[8]; transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]); sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]); cyls = be16_to_cpup((__be16 *)&buf[8 + 8]); rpm = be16_to_cpup((__be16 *)&buf[8 + 28]); heads = buf[8 + 4]; sectors = buf[8 + 5]; capacity = cyls * heads * sectors * sector_size; if (memcmp(page, &floppy->flexible_disk_page, 32)) printk(KERN_INFO PFX "%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 PFX "%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; drive->capacity64 = floppy->blocks * floppy->bs_factor; } 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) { struct ide_disk_obj *floppy = drive->driver_data; struct gendisk *disk = floppy->disk; struct ide_atapi_pc pc; u8 *cap_desc; u8 pc_buf[256], header_len, desc_cnt; int i, rc = 1, blocks, length; ide_debug_log(IDE_DBG_FUNC, "enter"); drive->bios_cyl = 0; drive->bios_head = drive->bios_sect = 0; floppy->blocks = 0; floppy->bs_factor = 1; drive->capacity64 = 0; ide_floppy_create_read_capacity_cmd(&pc); if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) { printk(KERN_ERR PFX "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]); ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, " "%d sector size", 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 PFX "%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 PFX "%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 PFX "%s: Warning: " "non 512 bytes block size not " "fully supported\n", drive->name); drive->capacity64 = floppy->blocks * floppy->bs_factor; 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 PFX "%s: No disk in drive\n", drive->name); break; case CAPACITY_INVALID: printk(KERN_ERR PFX "%s: Invalid capacity for disk " "in drive\n", drive->name); break; } ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d", 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, &pc); return rc; } static void ide_floppy_setup(ide_drive_t *drive) { struct ide_disk_obj *floppy = drive->driver_data; u16 *id = drive->id; drive->pc_callback = ide_floppy_callback; /* * 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 */ drive->pc_delay = IDEFLOPPY_PC_DELAY; blk_queue_max_hw_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_hw_sectors(drive->queue, 64); drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; /* IOMEGA Clik! drives do not support lock/unlock commands */ drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; } (void) ide_floppy_get_capacity(drive); ide_proc_register_driver(drive, floppy->driver); drive->dev_flags |= IDE_DFLAG_ATTACH; } static void ide_floppy_flush(ide_drive_t *drive) { } static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk) { int ret = 0; if (ide_do_test_unit_ready(drive, disk)) ide_do_start_stop(drive, disk, 1); ret = ide_floppy_get_capacity(drive); set_capacity(disk, ide_gd_capacity(drive)); return ret; } const struct ide_disk_ops ide_atapi_disk_ops = { .check = ide_check_atapi_device, .get_capacity = ide_floppy_get_capacity, .setup = ide_floppy_setup, .flush = ide_floppy_flush, .init_media = ide_floppy_init_media, .set_doorlock = ide_set_media_lock, .do_request = ide_floppy_do_request, .ioctl = ide_floppy_ioctl, };