| /* |
| * 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/slab.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/irq.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) */ |
| |
| /* |
| * Used to finish servicing a private request. |
| */ |
| static int ide_floppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) |
| { |
| struct request *rq = drive->hwif->rq; |
| |
| ide_debug_log(IDE_DBG_FUNC, "enter"); |
| |
| if (uptodate == 0) |
| drive->failed_pc = NULL; |
| |
| rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL; |
| |
| ide_complete_rq(drive, 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) |
| ide_end_request(drive, 1, 0); |
| } |
| |
| static void 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 && blk_pc_request(rq))) |
| uptodate = 1; /* FIXME */ |
| else if (pc->c[0] == GPCMD_REQUEST_SENSE) { |
| u8 *buf = 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 (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 (uptodate == 0) |
| drive->failed_pc = NULL; |
| |
| if (blk_special_request(rq)) { |
| rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL; |
| ide_complete_rq(drive, 0); |
| } else |
| ide_end_request(drive, uptodate, 0); |
| } |
| |
| static void ide_floppy_report_error(struct ide_disk_obj *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 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 idefloppy_issue_pc(ide_drive_t *drive, |
| 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) { |
| 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); |
| return ide_stopped; |
| } |
| |
| ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries); |
| |
| pc->retries++; |
| |
| return ide_issue_pc(drive); |
| } |
| |
| 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 = rq->nr_sectors / 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; |
| 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(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; |
| 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 ide_floppy_do_request(ide_drive_t *drive, |
| struct request *rq, sector_t block) |
| { |
| struct ide_disk_obj *floppy = drive->driver_data; |
| ide_hwif_t *hwif = drive->hwif; |
| struct ide_atapi_pc *pc; |
| |
| 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 (blk_special_request(rq)) { |
| rq->errors = IDE_DRV_ERROR_GENERAL; |
| ide_complete_rq(drive, 0); |
| return ide_stopped; |
| } else |
| goto out_end; |
| } |
| if (blk_fs_request(rq)) { |
| if (((long)rq->sector % floppy->bs_factor) || |
| (rq->nr_sectors % 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); |
| } 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, PFX "unsupported command in queue"); |
| goto out_end; |
| } |
| |
| if (blk_fs_request(rq) || pc->req_xfer) { |
| 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); |
| out_end: |
| drive->failed_pc = NULL; |
| ide_end_request(drive, 0, 0); |
| 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; |
| 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 PFX "Can't get flexible disk page params\n"); |
| return 1; |
| } |
| |
| if (pc->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 = &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 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 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; |
| drive->capacity64 = 0; |
| |
| ide_floppy_create_read_capacity_cmd(&pc); |
| if (ide_queue_pc_tail(drive, disk, &pc)) { |
| 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; |
| drive->pc_update_buffers = idefloppy_update_buffers; |
| drive->pc_io_buffers = ide_io_buffers; |
| |
| /* |
| * 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_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->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, |
| .end_request = ide_floppy_end_request, |
| .ioctl = ide_floppy_ioctl, |
| }; |