+++ /dev/null
-// 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/compat.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 *)ide_req(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;
- fallthrough;
- 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);
-}
-
-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,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = ide_floppy_compat_ioctl,
-#endif
-};
projects / linux-2.6-microblaze.git / blobdiff