538 lines
14 KiB
C
538 lines
14 KiB
C
/*
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* IDE ATAPI floppy driver.
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*
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* Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
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* Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
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* Copyright (C) 2005 Bartlomiej Zolnierkiewicz
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*
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* This driver supports the following IDE floppy drives:
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*
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* LS-120/240 SuperDisk
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* Iomega Zip 100/250
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* Iomega PC Card Clik!/PocketZip
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*
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* For a historical changelog see
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* Documentation/ide/ChangeLog.ide-floppy.1996-2002
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/slab.h>
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#include <linux/cdrom.h>
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#include <linux/ide.h>
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#include <linux/hdreg.h>
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#include <linux/bitops.h>
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#include <linux/mutex.h>
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#include <linux/scatterlist.h>
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#include <scsi/scsi_ioctl.h>
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#include <asm/byteorder.h>
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#include <linux/irq.h>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <asm/unaligned.h>
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#include "ide-floppy.h"
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/*
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* After each failed packet command we issue a request sense command and retry
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* the packet command IDEFLOPPY_MAX_PC_RETRIES times.
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*/
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#define IDEFLOPPY_MAX_PC_RETRIES 3
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/* format capacities descriptor codes */
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#define CAPACITY_INVALID 0x00
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#define CAPACITY_UNFORMATTED 0x01
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#define CAPACITY_CURRENT 0x02
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#define CAPACITY_NO_CARTRIDGE 0x03
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/*
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* The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
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* was apparently being deasserted before the unit was ready to receive data.
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*/
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#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
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static int ide_floppy_callback(ide_drive_t *drive, int dsc)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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struct ide_atapi_pc *pc = drive->pc;
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struct request *rq = pc->rq;
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int uptodate = pc->error ? 0 : 1;
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ide_debug_log(IDE_DBG_FUNC, "enter");
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if (drive->failed_pc == pc)
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drive->failed_pc = NULL;
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if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
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(rq && blk_pc_request(rq)))
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uptodate = 1; /* FIXME */
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else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
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u8 *buf = bio_data(rq->bio);
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if (!pc->error) {
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floppy->sense_key = buf[2] & 0x0F;
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floppy->asc = buf[12];
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floppy->ascq = buf[13];
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floppy->progress_indication = buf[15] & 0x80 ?
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(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
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if (drive->failed_pc)
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ide_debug_log(IDE_DBG_PC, "pc = %x",
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drive->failed_pc->c[0]);
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ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
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"ascq = %x", floppy->sense_key,
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floppy->asc, floppy->ascq);
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} else
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printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
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"Aborting request!\n");
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}
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if (blk_special_request(rq))
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rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;
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return uptodate;
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}
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static void ide_floppy_report_error(struct ide_disk_obj *floppy,
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struct ide_atapi_pc *pc)
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{
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/* supress error messages resulting from Medium not present */
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if (floppy->sense_key == 0x02 &&
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floppy->asc == 0x3a &&
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floppy->ascq == 0x00)
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return;
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printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
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"asc = %2x, ascq = %2x\n",
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floppy->drive->name, pc->c[0], floppy->sense_key,
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floppy->asc, floppy->ascq);
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}
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static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
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struct ide_cmd *cmd,
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struct ide_atapi_pc *pc)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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if (drive->failed_pc == NULL &&
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pc->c[0] != GPCMD_REQUEST_SENSE)
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drive->failed_pc = pc;
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/* Set the current packet command */
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drive->pc = pc;
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if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
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unsigned int done = blk_rq_bytes(drive->hwif->rq);
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if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
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ide_floppy_report_error(floppy, pc);
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/* Giving up */
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pc->error = IDE_DRV_ERROR_GENERAL;
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drive->failed_pc = NULL;
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drive->pc_callback(drive, 0);
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ide_complete_rq(drive, -EIO, done);
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return ide_stopped;
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}
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ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);
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pc->retries++;
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return ide_issue_pc(drive, cmd);
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}
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void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
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{
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ide_init_pc(pc);
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pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
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pc->c[7] = 255;
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pc->c[8] = 255;
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pc->req_xfer = 255;
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}
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/* A mode sense command is used to "sense" floppy parameters. */
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void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
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{
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u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
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ide_init_pc(pc);
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pc->c[0] = GPCMD_MODE_SENSE_10;
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pc->c[1] = 0;
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pc->c[2] = page_code;
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switch (page_code) {
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case IDEFLOPPY_CAPABILITIES_PAGE:
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length += 12;
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break;
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case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
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length += 32;
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break;
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default:
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printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
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}
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put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
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pc->req_xfer = length;
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}
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static void idefloppy_create_rw_cmd(ide_drive_t *drive,
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struct ide_atapi_pc *pc, struct request *rq,
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unsigned long sector)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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int block = sector / floppy->bs_factor;
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int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
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int cmd = rq_data_dir(rq);
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ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);
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ide_init_pc(pc);
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pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
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put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
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put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
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memcpy(rq->cmd, pc->c, 12);
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pc->rq = rq;
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if (rq->cmd_flags & REQ_RW)
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pc->flags |= PC_FLAG_WRITING;
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pc->flags |= PC_FLAG_DMA_OK;
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}
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static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
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struct ide_atapi_pc *pc, struct request *rq)
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{
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ide_init_pc(pc);
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memcpy(pc->c, rq->cmd, sizeof(pc->c));
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pc->rq = rq;
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if (blk_rq_bytes(rq)) {
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pc->flags |= PC_FLAG_DMA_OK;
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if (rq_data_dir(rq) == WRITE)
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pc->flags |= PC_FLAG_WRITING;
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}
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}
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static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
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struct request *rq, sector_t block)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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struct ide_cmd cmd;
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struct ide_atapi_pc *pc;
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ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);
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if (drive->debug_mask & IDE_DBG_RQ)
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blk_dump_rq_flags(rq, (rq->rq_disk
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? rq->rq_disk->disk_name
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: "dev?"));
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if (rq->errors >= ERROR_MAX) {
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if (drive->failed_pc) {
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ide_floppy_report_error(floppy, drive->failed_pc);
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drive->failed_pc = NULL;
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} else
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printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
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if (blk_special_request(rq)) {
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rq->errors = 0;
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ide_complete_rq(drive, 0, blk_rq_bytes(rq));
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return ide_stopped;
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} else
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goto out_end;
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}
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if (blk_fs_request(rq)) {
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if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
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(blk_rq_sectors(rq) % floppy->bs_factor)) {
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printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
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drive->name);
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goto out_end;
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}
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pc = &floppy->queued_pc;
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idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
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} else if (blk_special_request(rq) || blk_sense_request(rq)) {
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pc = (struct ide_atapi_pc *)rq->special;
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} else if (blk_pc_request(rq)) {
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pc = &floppy->queued_pc;
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idefloppy_blockpc_cmd(floppy, pc, rq);
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} else
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BUG();
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ide_prep_sense(drive, rq);
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memset(&cmd, 0, sizeof(cmd));
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if (rq_data_dir(rq))
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cmd.tf_flags |= IDE_TFLAG_WRITE;
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cmd.rq = rq;
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if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
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ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
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ide_map_sg(drive, &cmd);
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}
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pc->rq = rq;
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return ide_floppy_issue_pc(drive, &cmd, pc);
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out_end:
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drive->failed_pc = NULL;
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if (blk_fs_request(rq) == 0 && rq->errors == 0)
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rq->errors = -EIO;
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ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
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return ide_stopped;
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}
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/*
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* Look at the flexible disk page parameters. We ignore the CHS capacity
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* parameters and use the LBA parameters instead.
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*/
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static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
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struct ide_atapi_pc *pc)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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struct gendisk *disk = floppy->disk;
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u8 *page, buf[40];
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int capacity, lba_capacity;
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u16 transfer_rate, sector_size, cyls, rpm;
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u8 heads, sectors;
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ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
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if (ide_queue_pc_tail(drive, disk, pc, buf, pc->req_xfer)) {
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printk(KERN_ERR PFX "Can't get flexible disk page params\n");
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return 1;
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}
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if (buf[3] & 0x80)
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drive->dev_flags |= IDE_DFLAG_WP;
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else
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drive->dev_flags &= ~IDE_DFLAG_WP;
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set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
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page = &buf[8];
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transfer_rate = be16_to_cpup((__be16 *)&buf[8 + 2]);
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sector_size = be16_to_cpup((__be16 *)&buf[8 + 6]);
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cyls = be16_to_cpup((__be16 *)&buf[8 + 8]);
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rpm = be16_to_cpup((__be16 *)&buf[8 + 28]);
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heads = buf[8 + 4];
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sectors = buf[8 + 5];
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capacity = cyls * heads * sectors * sector_size;
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if (memcmp(page, &floppy->flexible_disk_page, 32))
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printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
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"%d sector size, %d rpm\n",
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drive->name, capacity / 1024, cyls, heads,
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sectors, transfer_rate / 8, sector_size, rpm);
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memcpy(&floppy->flexible_disk_page, page, 32);
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drive->bios_cyl = cyls;
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drive->bios_head = heads;
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drive->bios_sect = sectors;
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lba_capacity = floppy->blocks * floppy->block_size;
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if (capacity < lba_capacity) {
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printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
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"bytes, but the drive only handles %d\n",
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drive->name, lba_capacity, capacity);
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floppy->blocks = floppy->block_size ?
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capacity / floppy->block_size : 0;
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drive->capacity64 = floppy->blocks * floppy->bs_factor;
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}
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return 0;
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}
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/*
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* Determine if a media is present in the floppy drive, and if so, its LBA
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* capacity.
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*/
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static int ide_floppy_get_capacity(ide_drive_t *drive)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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struct gendisk *disk = floppy->disk;
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struct ide_atapi_pc pc;
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u8 *cap_desc;
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u8 pc_buf[256], header_len, desc_cnt;
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int i, rc = 1, blocks, length;
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ide_debug_log(IDE_DBG_FUNC, "enter");
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drive->bios_cyl = 0;
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drive->bios_head = drive->bios_sect = 0;
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floppy->blocks = 0;
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floppy->bs_factor = 1;
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drive->capacity64 = 0;
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ide_floppy_create_read_capacity_cmd(&pc);
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if (ide_queue_pc_tail(drive, disk, &pc, pc_buf, pc.req_xfer)) {
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printk(KERN_ERR PFX "Can't get floppy parameters\n");
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return 1;
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}
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header_len = pc_buf[3];
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cap_desc = &pc_buf[4];
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desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
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for (i = 0; i < desc_cnt; i++) {
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unsigned int desc_start = 4 + i*8;
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blocks = be32_to_cpup((__be32 *)&pc_buf[desc_start]);
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length = be16_to_cpup((__be16 *)&pc_buf[desc_start + 6]);
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ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
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"%d sector size",
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i, blocks * length / 1024,
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blocks, length);
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if (i)
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continue;
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/*
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* the code below is valid only for the 1st descriptor, ie i=0
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*/
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switch (pc_buf[desc_start + 4] & 0x03) {
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/* Clik! drive returns this instead of CAPACITY_CURRENT */
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case CAPACITY_UNFORMATTED:
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if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
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/*
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* If it is not a clik drive, break out
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* (maintains previous driver behaviour)
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*/
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break;
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case CAPACITY_CURRENT:
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/* Normal Zip/LS-120 disks */
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if (memcmp(cap_desc, &floppy->cap_desc, 8))
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printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
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"sector size\n",
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drive->name, blocks * length / 1024,
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blocks, length);
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memcpy(&floppy->cap_desc, cap_desc, 8);
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if (!length || length % 512) {
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printk(KERN_NOTICE PFX "%s: %d bytes block size"
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" not supported\n", drive->name, length);
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} else {
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floppy->blocks = blocks;
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floppy->block_size = length;
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floppy->bs_factor = length / 512;
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if (floppy->bs_factor != 1)
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printk(KERN_NOTICE PFX "%s: Warning: "
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"non 512 bytes block size not "
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"fully supported\n",
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drive->name);
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drive->capacity64 =
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floppy->blocks * floppy->bs_factor;
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rc = 0;
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}
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break;
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case CAPACITY_NO_CARTRIDGE:
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/*
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* This is a KERN_ERR so it appears on screen
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* for the user to see
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*/
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printk(KERN_ERR PFX "%s: No disk in drive\n",
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drive->name);
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break;
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case CAPACITY_INVALID:
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printk(KERN_ERR PFX "%s: Invalid capacity for disk "
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"in drive\n", drive->name);
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break;
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}
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ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
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pc_buf[desc_start + 4] & 0x03);
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}
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/* Clik! disk does not support get_flexible_disk_page */
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if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
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(void) ide_floppy_get_flexible_disk_page(drive, &pc);
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return rc;
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}
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static void ide_floppy_setup(ide_drive_t *drive)
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{
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struct ide_disk_obj *floppy = drive->driver_data;
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u16 *id = drive->id;
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drive->pc_callback = ide_floppy_callback;
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/*
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* We used to check revisions here. At this point however I'm giving up.
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* Just assume they are all broken, its easier.
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*
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* The actual reason for the workarounds was likely a driver bug after
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* all rather than a firmware bug, and the workaround below used to hide
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* it. It should be fixed as of version 1.9, but to be on the safe side
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* we'll leave the limitation below for the 2.2.x tree.
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*/
|
|
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,
|
|
.ioctl = ide_floppy_ioctl,
|
|
};
|