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-rw-r--r--drivers/ide/ide-floppy.c549
1 files changed, 549 insertions, 0 deletions
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
new file mode 100644
index 000000000..a8df300f9
--- /dev/null
+++ b/drivers/ide/ide-floppy.c
@@ -0,0 +1,549 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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 ||
+ blk_rq_is_scsi(rq))
+ 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 (ata_misc_request(rq))
+ scsi_req(rq)->result = 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, BLK_STS_IOERR, 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(scsi_req(rq)->cmd, pc->c, 12);
+
+ pc->rq = rq;
+ if (cmd == 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, scsi_req(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 (scsi_req(rq)->result >= 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 (ata_misc_request(rq)) {
+ scsi_req(rq)->result = 0;
+ ide_complete_rq(drive, BLK_STS_OK, blk_rq_bytes(rq));
+ return ide_stopped;
+ } else
+ goto out_end;
+ }
+
+ switch (req_op(rq)) {
+ default:
+ 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_OP_SCSI_IN:
+ case REQ_OP_SCSI_OUT:
+ pc = &floppy->queued_pc;
+ idefloppy_blockpc_cmd(floppy, pc, rq);
+ break;
+ case REQ_OP_DRV_IN:
+ case REQ_OP_DRV_OUT:
+ switch (ide_req(rq)->type) {
+ case ATA_PRIV_MISC:
+ case ATA_PRIV_SENSE:
+ pc = (struct ide_atapi_pc *)rq->special;
+ 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 (!blk_rq_is_passthrough(rq) || 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 (blk_rq_is_passthrough(rq) && scsi_req(rq)->result == 0)
+ scsi_req(rq)->result = -EIO;
+ ide_complete_rq(drive, BLK_STS_IOERR, 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;
+ /* else: fall through */
+ 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,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 19:23:28 +0000