From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/ide/ide-floppy.c | 542 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 542 insertions(+) create mode 100644 drivers/ide/ide-floppy.c (limited to 'drivers/ide/ide-floppy.c') diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c new file mode 100644 index 000000000..8c6363cdd --- /dev/null +++ b/drivers/ide/ide-floppy.c @@ -0,0 +1,542 @@ +/* + * 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 + */ + +#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" + +/* + * 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 (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI")) { + 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 (strstarts((char *)&id[ATA_ID_PROD], "IOMEGA Clik!")) { + 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, +}; -- cgit v1.2.3-54-g00ecf