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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Borislav Petkovd3f20842008-02-01 23:09:33 +01002 * IDE ATAPI floppy driver.
3 *
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01004 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
6 * Copyright (C) 2005 Bartlomiej Zolnierkiewicz
Borislav Petkov0571c7a2008-02-02 19:56:38 +01007 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * This driver supports the following IDE floppy drives:
9 *
10 * LS-120/240 SuperDisk
11 * Iomega Zip 100/250
12 * Iomega PC Card Clik!/PocketZip
13 *
Borislav Petkovd3f20842008-02-01 23:09:33 +010014 * For a historical changelog see
15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
Linus Torvalds1da177e2005-04-16 15:20:36 -070016 */
17
Bartlomiej Zolnierkiewicz51509ee2008-10-10 22:39:34 +020018#define DRV_NAME "ide-floppy"
Borislav Petkov7b355722008-10-13 21:39:35 +020019#define PFX DRV_NAME ": "
Bartlomiej Zolnierkiewicz51509ee2008-10-10 22:39:34 +020020
Borislav Petkovfc6c5bc2008-02-02 19:56:38 +010021#define IDEFLOPPY_VERSION "1.00"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/kernel.h>
27#include <linux/delay.h>
28#include <linux/timer.h>
29#include <linux/mm.h>
30#include <linux/interrupt.h>
31#include <linux/major.h>
32#include <linux/errno.h>
33#include <linux/genhd.h>
34#include <linux/slab.h>
35#include <linux/cdrom.h>
36#include <linux/ide.h>
Bartlomiej Zolnierkiewicz3ceca722008-10-10 22:39:27 +020037#include <linux/hdreg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/bitops.h>
Arjan van de Vencf8b8972006-03-23 03:00:45 -080039#include <linux/mutex.h>
Borislav Petkovb98b3402008-10-10 22:39:35 +020040#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +020042#include <scsi/scsi_ioctl.h>
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <asm/byteorder.h>
Borislav Petkov7e8b1632008-02-02 19:56:34 +010045#include <linux/irq.h>
46#include <linux/uaccess.h>
47#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <asm/unaligned.h>
49
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +020050#include "ide-floppy.h"
51
Borislav Petkovf373bd82008-02-02 19:56:36 +010052/* define to see debug info */
Borislav Petkov7b355722008-10-13 21:39:35 +020053#define IDEFLOPPY_DEBUG_LOG 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
55#if IDEFLOPPY_DEBUG_LOG
Borislav Petkov7b355722008-10-13 21:39:35 +020056#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#else
Borislav Petkov7b355722008-10-13 21:39:35 +020058#define ide_debug_log(lvl, fmt, args...) do {} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070059#endif
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010062 * After each failed packet command we issue a request sense command and retry
63 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 */
65#define IDEFLOPPY_MAX_PC_RETRIES 3
66
Borislav Petkov194ec0c2008-02-02 19:56:35 +010067/* format capacities descriptor codes */
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#define CAPACITY_INVALID 0x00
69#define CAPACITY_UNFORMATTED 0x01
70#define CAPACITY_CURRENT 0x02
71#define CAPACITY_NO_CARTRIDGE 0x03
72
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +020073/*
74 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
75 * was apparently being deasserted before the unit was ready to receive data.
76 */
77#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Borislav Petkov0571c7a2008-02-02 19:56:38 +010079/* Error code returned in rq->errors to the higher part of the driver. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070080#define IDEFLOPPY_ERROR_GENERAL 101
81
Arjan van de Vencf8b8972006-03-23 03:00:45 -080082static DEFINE_MUTEX(idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +020084static void idefloppy_cleanup_obj(struct kref *);
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
87{
88 struct ide_floppy_obj *floppy = NULL;
89
Arjan van de Vencf8b8972006-03-23 03:00:45 -080090 mutex_lock(&idefloppy_ref_mutex);
Borislav Petkov5aeddf92008-10-13 21:39:34 +020091 floppy = ide_drv_g(disk, ide_floppy_obj);
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +020092 if (floppy) {
Bartlomiej Zolnierkiewiczd3e33ff2008-08-05 18:16:59 +020093 if (ide_device_get(floppy->drive))
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +020094 floppy = NULL;
Bartlomiej Zolnierkiewiczd3e33ff2008-08-05 18:16:59 +020095 else
96 kref_get(&floppy->kref);
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +020097 }
Arjan van de Vencf8b8972006-03-23 03:00:45 -080098 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 return floppy;
100}
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102static void ide_floppy_put(struct ide_floppy_obj *floppy)
103{
Bartlomiej Zolnierkiewiczd3e33ff2008-08-05 18:16:59 +0200104 ide_drive_t *drive = floppy->drive;
105
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800106 mutex_lock(&idefloppy_ref_mutex);
Borislav Petkov9a24b632008-02-02 19:56:33 +0100107 kref_put(&floppy->kref, idefloppy_cleanup_obj);
Bartlomiej Zolnierkiewiczd3e33ff2008-08-05 18:16:59 +0200108 ide_device_put(drive);
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800109 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100113 * Used to finish servicing a request. For read/write requests, we will call
114 * ide_end_request to pass to the next buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 */
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200116static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
118 idefloppy_floppy_t *floppy = drive->driver_data;
119 struct request *rq = HWGROUP(drive)->rq;
120 int error;
121
Borislav Petkov7b355722008-10-13 21:39:35 +0200122 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124 switch (uptodate) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200125 case 0:
126 error = IDEFLOPPY_ERROR_GENERAL;
127 break;
128
129 case 1:
130 error = 0;
131 break;
132
133 default:
134 error = uptodate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 }
Borislav Petkov7b355722008-10-13 21:39:35 +0200136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 if (error)
138 floppy->failed_pc = NULL;
139 /* Why does this happen? */
140 if (!rq)
141 return 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200142 if (!blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 /* our real local end request function */
144 ide_end_request(drive, uptodate, nsecs);
145 return 0;
146 }
147 rq->errors = error;
148 /* fixme: need to move this local also */
149 ide_end_drive_cmd(drive, 0, 0);
150 return 0;
151}
152
Borislav Petkov8e555122008-04-18 00:46:27 +0200153static void idefloppy_update_buffers(ide_drive_t *drive,
154 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155{
156 struct request *rq = pc->rq;
157 struct bio *bio = rq->bio;
158
159 while ((bio = rq->bio) != NULL)
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200160 idefloppy_end_request(drive, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161}
162
Bartlomiej Zolnierkiewiczb14c7212008-10-13 21:39:30 +0200163static void ide_floppy_callback(ide_drive_t *drive, int dsc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164{
165 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200166 struct ide_atapi_pc *pc = drive->pc;
Borislav Petkov81f49382008-07-15 21:21:56 +0200167 int uptodate = pc->error ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Borislav Petkov7b355722008-10-13 21:39:35 +0200169 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100170
Bartlomiej Zolnierkiewiczdd2e9a02008-07-15 21:22:01 +0200171 if (floppy->failed_pc == pc)
172 floppy->failed_pc = NULL;
173
Borislav Petkov81f49382008-07-15 21:21:56 +0200174 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
175 (pc->rq && blk_pc_request(pc->rq)))
176 uptodate = 1; /* FIXME */
177 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200178 u8 *buf = pc->buf;
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100179
Borislav Petkov81f49382008-07-15 21:21:56 +0200180 if (!pc->error) {
181 floppy->sense_key = buf[2] & 0x0F;
182 floppy->asc = buf[12];
183 floppy->ascq = buf[13];
184 floppy->progress_indication = buf[15] & 0x80 ?
185 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
186
187 if (floppy->failed_pc)
Borislav Petkov7b355722008-10-13 21:39:35 +0200188 ide_debug_log(IDE_DBG_PC, "pc = %x, ",
189 floppy->failed_pc->c[0]);
Borislav Petkov81f49382008-07-15 21:21:56 +0200190
Borislav Petkov7b355722008-10-13 21:39:35 +0200191 ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
192 "ascq = %x\n", floppy->sense_key,
193 floppy->asc, floppy->ascq);
Borislav Petkov81f49382008-07-15 21:21:56 +0200194 } else
Borislav Petkov7b355722008-10-13 21:39:35 +0200195 printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
196 "Aborting request!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Borislav Petkov81f49382008-07-15 21:21:56 +0200199 idefloppy_end_request(drive, uptodate, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200}
201
Borislav Petkovd652c132008-02-02 19:56:35 +0100202static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
Borislav Petkov8e555122008-04-18 00:46:27 +0200203 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Borislav Petkovd652c132008-02-02 19:56:35 +0100205 /* supress error messages resulting from Medium not present */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 if (floppy->sense_key == 0x02 &&
207 floppy->asc == 0x3a &&
208 floppy->ascq == 0x00)
Borislav Petkovd652c132008-02-02 19:56:35 +0100209 return;
210
Borislav Petkov7b355722008-10-13 21:39:35 +0200211 printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
Borislav Petkovd652c132008-02-02 19:56:35 +0100212 "asc = %2x, ascq = %2x\n",
213 floppy->drive->name, pc->c[0], floppy->sense_key,
214 floppy->asc, floppy->ascq);
215
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100218static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
Borislav Petkov8e555122008-04-18 00:46:27 +0200219 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
221 idefloppy_floppy_t *floppy = drive->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 if (floppy->failed_pc == NULL &&
Borislav Petkov30d67092008-02-02 19:56:33 +0100224 pc->c[0] != GPCMD_REQUEST_SENSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 floppy->failed_pc = pc;
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200226
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 /* Set the current packet command */
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200228 drive->pc = pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Borislav Petkov757ced82008-02-02 19:56:37 +0100230 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100231 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
Borislav Petkov757ced82008-02-02 19:56:37 +0100232 ide_floppy_report_error(floppy, pc);
233 /* Giving up */
234 pc->error = IDEFLOPPY_ERROR_GENERAL;
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 floppy->failed_pc = NULL;
Bartlomiej Zolnierkiewiczb14c7212008-10-13 21:39:30 +0200237 drive->pc_callback(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 return ide_stopped;
239 }
240
Borislav Petkov7b355722008-10-13 21:39:35 +0200241 ide_debug_log(IDE_DBG_FUNC, "%s: Retry #%d\n", __func__, pc->retries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243 pc->retries++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +0200245 return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246}
247
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200248void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249{
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200250 ide_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100251 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 pc->c[7] = 255;
253 pc->c[8] = 255;
Borislav Petkov8e555122008-04-18 00:46:27 +0200254 pc->req_xfer = 255;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100257/* A mode sense command is used to "sense" floppy parameters. */
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200258void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Borislav Petkov24a5d702008-02-02 19:56:34 +0100260 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100261
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200262 ide_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100263 pc->c[0] = GPCMD_MODE_SENSE_10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 pc->c[1] = 0;
Bartlomiej Zolnierkiewicz4de4b9e2008-10-10 22:39:36 +0200265 pc->c[2] = page_code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
267 switch (page_code) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100268 case IDEFLOPPY_CAPABILITIES_PAGE:
269 length += 12;
270 break;
271 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
272 length += 32;
273 break;
274 default:
Borislav Petkov7b355722008-10-13 21:39:35 +0200275 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 }
Borislav Petkov8f622432008-02-02 19:56:33 +0100277 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
Borislav Petkov8e555122008-04-18 00:46:27 +0200278 pc->req_xfer = length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Borislav Petkov7b355722008-10-13 21:39:35 +0200281static void idefloppy_create_rw_cmd(ide_drive_t *drive,
Borislav Petkov8e555122008-04-18 00:46:27 +0200282 struct ide_atapi_pc *pc, struct request *rq,
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100283 unsigned long sector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
Borislav Petkov7b355722008-10-13 21:39:35 +0200285 idefloppy_floppy_t *floppy = drive->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 int block = sector / floppy->bs_factor;
287 int blocks = rq->nr_sectors / floppy->bs_factor;
288 int cmd = rq_data_dir(rq);
289
Borislav Petkov7b355722008-10-13 21:39:35 +0200290 ide_debug_log(IDE_DBG_FUNC, "%s: block: %d, blocks: %d\n", __func__,
291 block, blocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200293 ide_init_pc(pc);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100294 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
295 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
Borislav Petkov8f622432008-02-02 19:56:33 +0100296 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100297
Borislav Petkov20cd93b2008-07-23 19:56:00 +0200298 memcpy(rq->cmd, pc->c, 12);
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 pc->rq = rq;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200301 pc->b_count = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200302 if (rq->cmd_flags & REQ_RW)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100303 pc->flags |= PC_FLAG_WRITING;
Borislav Petkov8e555122008-04-18 00:46:27 +0200304 pc->buf = NULL;
305 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
Bartlomiej Zolnierkiewicz5e331092008-07-15 21:21:56 +0200306 pc->flags |= PC_FLAG_DMA_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100309static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
Borislav Petkov8e555122008-04-18 00:46:27 +0200310 struct ide_atapi_pc *pc, struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311{
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200312 ide_init_pc(pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 memcpy(pc->c, rq->cmd, sizeof(pc->c));
Jens Axboe3d6392c2007-07-09 12:38:05 +0200314 pc->rq = rq;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200315 pc->b_count = 0;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200316 if (rq->data_len && rq_data_dir(rq) == WRITE)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100317 pc->flags |= PC_FLAG_WRITING;
Borislav Petkov8e555122008-04-18 00:46:27 +0200318 pc->buf = rq->data;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200319 if (rq->bio)
Bartlomiej Zolnierkiewicz5e331092008-07-15 21:21:56 +0200320 pc->flags |= PC_FLAG_DMA_OK;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200321 /*
322 * possibly problematic, doesn't look like ide-floppy correctly
323 * handled scattered requests if dma fails...
324 */
Borislav Petkov8e555122008-04-18 00:46:27 +0200325 pc->req_xfer = pc->buf_size = rq->data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326}
327
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100328static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
329 struct request *rq, sector_t block_s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 idefloppy_floppy_t *floppy = drive->driver_data;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200332 ide_hwif_t *hwif = drive->hwif;
Borislav Petkov8e555122008-04-18 00:46:27 +0200333 struct ide_atapi_pc *pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 unsigned long block = (unsigned long)block_s;
335
Borislav Petkov7b355722008-10-13 21:39:35 +0200336 ide_debug_log(IDE_DBG_FUNC, "%s: dev: %s, cmd: 0x%x, cmd_type: %x, "
337 "errors: %d\n",
338 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
339 rq->cmd[0], rq->cmd_type, rq->errors);
Borislav Petkovb98b3402008-10-10 22:39:35 +0200340
Borislav Petkov7b355722008-10-13 21:39:35 +0200341 ide_debug_log(IDE_DBG_FUNC, "%s: sector: %ld, nr_sectors: %ld, "
342 "current_nr_sectors: %d\n",
343 __func__, (long)rq->sector, rq->nr_sectors,
344 rq->current_nr_sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
346 if (rq->errors >= ERROR_MAX) {
Borislav Petkovd652c132008-02-02 19:56:35 +0100347 if (floppy->failed_pc)
348 ide_floppy_report_error(floppy, floppy->failed_pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 else
Borislav Petkov7b355722008-10-13 21:39:35 +0200350 printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
351
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200352 idefloppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 return ide_stopped;
354 }
Jens Axboe4aff5e22006-08-10 08:44:47 +0200355 if (blk_fs_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 if (((long)rq->sector % floppy->bs_factor) ||
357 (rq->nr_sectors % floppy->bs_factor)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200358 printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
359 drive->name);
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200360 idefloppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 return ide_stopped;
362 }
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200363 pc = &floppy->queued_pc;
Borislav Petkov7b355722008-10-13 21:39:35 +0200364 idefloppy_create_rw_cmd(drive, pc, rq, block);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200365 } else if (blk_special_request(rq)) {
Borislav Petkov8e555122008-04-18 00:46:27 +0200366 pc = (struct ide_atapi_pc *) rq->buffer;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200367 } else if (blk_pc_request(rq)) {
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200368 pc = &floppy->queued_pc;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200369 idefloppy_blockpc_cmd(floppy, pc, rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 } else {
Borislav Petkov7b355722008-10-13 21:39:35 +0200371 blk_dump_rq_flags(rq, PFX "unsupported command in queue");
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200372 idefloppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 return ide_stopped;
374 }
375
Borislav Petkovb98b3402008-10-10 22:39:35 +0200376 ide_init_sg_cmd(drive, rq);
377 ide_map_sg(drive, rq);
378
379 pc->sg = hwif->sg_table;
380 pc->sg_cnt = hwif->sg_nents;
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 pc->rq = rq;
Bartlomiej Zolnierkiewicz5d418932008-07-15 21:21:57 +0200383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 return idefloppy_issue_pc(drive, pc);
385}
386
387/*
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100388 * Look at the flexible disk page parameters. We ignore the CHS capacity
389 * parameters and use the LBA parameters instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 */
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100391static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392{
393 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200394 struct gendisk *disk = floppy->disk;
Borislav Petkov8e555122008-04-18 00:46:27 +0200395 struct ide_atapi_pc pc;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100396 u8 *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 int capacity, lba_capacity;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100398 u16 transfer_rate, sector_size, cyls, rpm;
399 u8 heads, sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200401 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100402
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200403 if (ide_queue_pc_tail(drive, disk, &pc)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200404 printk(KERN_ERR PFX "Can't get flexible disk page params\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 return 1;
406 }
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200407
408 if (pc.buf[3] & 0x80)
409 drive->atapi_flags |= IDE_AFLAG_WP;
410 else
411 drive->atapi_flags &= ~IDE_AFLAG_WP;
412
413 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
414
Borislav Petkov8e555122008-04-18 00:46:27 +0200415 page = &pc.buf[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Harvey Harrison85ae98a2008-07-16 20:33:47 +0200417 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
418 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
419 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
420 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
Borislav Petkov8e555122008-04-18 00:46:27 +0200421 heads = pc.buf[8 + 4];
422 sectors = pc.buf[8 + 5];
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100423
424 capacity = cyls * heads * sectors * sector_size;
425
426 if (memcmp(page, &floppy->flexible_disk_page, 32))
Borislav Petkov7b355722008-10-13 21:39:35 +0200427 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 "%d sector size, %d rpm\n",
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100429 drive->name, capacity / 1024, cyls, heads,
430 sectors, transfer_rate / 8, sector_size, rpm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100432 memcpy(&floppy->flexible_disk_page, page, 32);
433 drive->bios_cyl = cyls;
434 drive->bios_head = heads;
435 drive->bios_sect = sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 lba_capacity = floppy->blocks * floppy->block_size;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 if (capacity < lba_capacity) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200439 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 "bytes, but the drive only handles %d\n",
441 drive->name, lba_capacity, capacity);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100442 floppy->blocks = floppy->block_size ?
443 capacity / floppy->block_size : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
445 return 0;
446}
447
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448/*
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100449 * Determine if a media is present in the floppy drive, and if so, its LBA
450 * capacity.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 */
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100452static int ide_floppy_get_capacity(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
454 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200455 struct gendisk *disk = floppy->disk;
Borislav Petkov8e555122008-04-18 00:46:27 +0200456 struct ide_atapi_pc pc;
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100457 u8 *cap_desc;
458 u8 header_len, desc_cnt;
459 int i, rc = 1, blocks, length;
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 drive->bios_cyl = 0;
462 drive->bios_head = drive->bios_sect = 0;
Alan Coxfdb77da2007-02-17 02:40:20 +0100463 floppy->blocks = 0;
464 floppy->bs_factor = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 set_capacity(floppy->disk, 0);
466
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200467 ide_floppy_create_read_capacity_cmd(&pc);
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200468 if (ide_queue_pc_tail(drive, disk, &pc)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200469 printk(KERN_ERR PFX "Can't get floppy parameters\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 return 1;
471 }
Borislav Petkov8e555122008-04-18 00:46:27 +0200472 header_len = pc.buf[3];
473 cap_desc = &pc.buf[4];
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100474 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100476 for (i = 0; i < desc_cnt; i++) {
477 unsigned int desc_start = 4 + i*8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Harvey Harrison85ae98a2008-07-16 20:33:47 +0200479 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
480 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100481
Borislav Petkov7b355722008-10-13 21:39:35 +0200482 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
483 "%d sector size\n",
484 i, blocks * length / 1024, blocks, length);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100485
486 if (i)
487 continue;
488 /*
489 * the code below is valid only for the 1st descriptor, ie i=0
490 */
491
Borislav Petkov8e555122008-04-18 00:46:27 +0200492 switch (pc.buf[desc_start + 4] & 0x03) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 /* Clik! drive returns this instead of CAPACITY_CURRENT */
494 case CAPACITY_UNFORMATTED:
Borislav Petkovea68d272008-07-23 19:56:01 +0200495 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100496 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 * If it is not a clik drive, break out
498 * (maintains previous driver behaviour)
499 */
500 break;
501 case CAPACITY_CURRENT:
502 /* Normal Zip/LS-120 disks */
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100503 if (memcmp(cap_desc, &floppy->cap_desc, 8))
Borislav Petkov7b355722008-10-13 21:39:35 +0200504 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
505 "sector size\n",
506 drive->name, blocks * length / 1024,
507 blocks, length);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100508 memcpy(&floppy->cap_desc, cap_desc, 8);
509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if (!length || length % 512) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200511 printk(KERN_NOTICE PFX "%s: %d bytes block size"
512 " not supported\n", drive->name, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 } else {
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100514 floppy->blocks = blocks;
515 floppy->block_size = length;
516 floppy->bs_factor = length / 512;
517 if (floppy->bs_factor != 1)
Borislav Petkov7b355722008-10-13 21:39:35 +0200518 printk(KERN_NOTICE PFX "%s: Warning: "
519 "non 512 bytes block size not "
520 "fully supported\n",
521 drive->name);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100522 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 }
524 break;
525 case CAPACITY_NO_CARTRIDGE:
526 /*
527 * This is a KERN_ERR so it appears on screen
528 * for the user to see
529 */
Borislav Petkov7b355722008-10-13 21:39:35 +0200530 printk(KERN_ERR PFX "%s: No disk in drive\n",
531 drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 break;
533 case CAPACITY_INVALID:
Borislav Petkov7b355722008-10-13 21:39:35 +0200534 printk(KERN_ERR PFX "%s: Invalid capacity for disk "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 "in drive\n", drive->name);
536 break;
537 }
Borislav Petkov7b355722008-10-13 21:39:35 +0200538 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d\n",
539 pc.buf[desc_start + 4] & 0x03);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 }
541
542 /* Clik! disk does not support get_flexible_disk_page */
Borislav Petkovea68d272008-07-23 19:56:01 +0200543 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100544 (void) ide_floppy_get_flexible_disk_page(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200546 set_capacity(disk, floppy->blocks * floppy->bs_factor);
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 return rc;
549}
550
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100551static sector_t idefloppy_capacity(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552{
553 idefloppy_floppy_t *floppy = drive->driver_data;
554 unsigned long capacity = floppy->blocks * floppy->bs_factor;
555
556 return capacity;
557}
558
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200559#ifdef CONFIG_IDE_PROC_FS
Elias Oltmanns92f1f8f2008-10-10 22:39:40 +0200560ide_devset_rw_field(bios_cyl, bios_cyl);
561ide_devset_rw_field(bios_head, bios_head);
562ide_devset_rw_field(bios_sect, bios_sect);
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +0200563ide_devset_rw_field(ticks, pc_delay);
Bartlomiej Zolnierkiewicz8185d5a2008-10-10 22:39:28 +0200564
Elias Oltmanns92f1f8f2008-10-10 22:39:40 +0200565static const struct ide_proc_devset idefloppy_settings[] = {
566 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
567 IDE_PROC_DEVSET(bios_head, 0, 255),
568 IDE_PROC_DEVSET(bios_sect, 0, 63),
569 IDE_PROC_DEVSET(ticks, 0, 255),
570 { 0 },
Bartlomiej Zolnierkiewicz8185d5a2008-10-10 22:39:28 +0200571};
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200572#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100574static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200576 u16 *id = drive->id;
Borislav Petkov3ad67762008-04-18 00:46:25 +0200577 u8 gcw[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200579 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200580
Bartlomiej Zolnierkiewicz85e39032008-10-13 21:39:32 +0200581 drive->pc_callback = ide_floppy_callback;
582 drive->pc_update_buffers = idefloppy_update_buffers;
583 drive->pc_io_buffers = ide_io_buffers;
Borislav Petkov3ad67762008-04-18 00:46:25 +0200584
585 if (((gcw[0] & 0x60) >> 5) == 1)
Borislav Petkovea68d272008-07-23 19:56:01 +0200586 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100588 * We used to check revisions here. At this point however I'm giving up.
589 * Just assume they are all broken, its easier.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 *
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100591 * The actual reason for the workarounds was likely a driver bug after
592 * all rather than a firmware bug, and the workaround below used to hide
593 * it. It should be fixed as of version 1.9, but to be on the safe side
594 * we'll leave the limitation below for the 2.2.x tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200596 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
Borislav Petkovea68d272008-07-23 19:56:01 +0200597 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 /* This value will be visible in the /proc/ide/hdx/settings */
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +0200599 drive->pc_delay = IDEFLOPPY_PC_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 blk_queue_max_sectors(drive->queue, 64);
601 }
602
603 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100604 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
605 * nasty clicking noises without it, so please don't remove this.
606 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200607 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 blk_queue_max_sectors(drive->queue, 64);
Borislav Petkovea68d272008-07-23 19:56:01 +0200609 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200610 /* IOMEGA Clik! drives do not support lock/unlock commands */
611 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 }
613
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100614 (void) ide_floppy_get_capacity(drive);
Bartlomiej Zolnierkiewicz1e874f42008-10-10 22:39:27 +0200615
616 ide_proc_register_driver(drive, floppy->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
618
Russell King4031bbe2006-01-06 11:41:00 +0000619static void ide_floppy_remove(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620{
621 idefloppy_floppy_t *floppy = drive->driver_data;
622 struct gendisk *g = floppy->disk;
623
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200624 ide_proc_unregister_driver(drive, floppy->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626 del_gendisk(g);
627
628 ide_floppy_put(floppy);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
630
Borislav Petkov9a24b632008-02-02 19:56:33 +0100631static void idefloppy_cleanup_obj(struct kref *kref)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632{
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200633 struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 ide_drive_t *drive = floppy->drive;
635 struct gendisk *g = floppy->disk;
636
637 drive->driver_data = NULL;
638 g->private_data = NULL;
639 put_disk(g);
640 kfree(floppy);
641}
642
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +0200643#ifdef CONFIG_IDE_PROC_FS
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100644static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
645 int count, int *eof, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646{
647 ide_drive_t*drive = (ide_drive_t *)data;
648 int len;
649
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100650 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
651 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652}
653
654static ide_proc_entry_t idefloppy_proc[] = {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100655 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
656 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 { NULL, 0, NULL, NULL }
658};
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +0200659#endif /* CONFIG_IDE_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660
Russell King4031bbe2006-01-06 11:41:00 +0000661static int ide_floppy_probe(ide_drive_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663static ide_driver_t idefloppy_driver = {
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200664 .gen_driver = {
Laurent Riffard4ef3b8f2005-11-18 22:15:40 +0100665 .owner = THIS_MODULE,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200666 .name = "ide-floppy",
667 .bus = &ide_bus_type,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200668 },
Russell King4031bbe2006-01-06 11:41:00 +0000669 .probe = ide_floppy_probe,
670 .remove = ide_floppy_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 .version = IDEFLOPPY_VERSION,
672 .media = ide_floppy,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673 .do_request = idefloppy_do_request,
Borislav Petkovc2b2b292008-04-18 00:46:27 +0200674 .end_request = idefloppy_end_request,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 .error = __ide_error,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200676#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 .proc = idefloppy_proc,
Bartlomiej Zolnierkiewicz8185d5a2008-10-10 22:39:28 +0200678 .settings = idefloppy_settings,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +0200679#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680};
681
682static int idefloppy_open(struct inode *inode, struct file *filp)
683{
684 struct gendisk *disk = inode->i_bdev->bd_disk;
685 struct ide_floppy_obj *floppy;
686 ide_drive_t *drive;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 int ret = 0;
688
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100689 floppy = ide_floppy_get(disk);
690 if (!floppy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 return -ENXIO;
692
693 drive = floppy->drive;
694
Borislav Petkov7b355722008-10-13 21:39:35 +0200695 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
696
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100697 floppy->openers++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100699 if (floppy->openers == 1) {
Borislav Petkovea68d272008-07-23 19:56:01 +0200700 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 /* Just in case */
702
Bartlomiej Zolnierkiewiczde699ad2008-10-10 22:39:39 +0200703 if (ide_do_test_unit_ready(drive, disk))
Bartlomiej Zolnierkiewicz0c8a6c72008-10-10 22:39:39 +0200704 ide_do_start_stop(drive, disk, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100706 if (ide_floppy_get_capacity(drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 && (filp->f_flags & O_NDELAY) == 0
708 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100709 * Allow O_NDELAY to open a drive without a disk, or with an
710 * unreadable disk, so that we can get the format capacity
711 * of the drive or begin the format - Sam
712 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 ret = -EIO;
715 goto out_put_floppy;
716 }
717
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200718 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 ret = -EROFS;
720 goto out_put_floppy;
721 }
Bartlomiej Zolnierkiewicze996fc82008-10-10 22:39:37 +0200722
Borislav Petkovea68d272008-07-23 19:56:01 +0200723 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200724 ide_set_media_lock(drive, disk, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 check_disk_change(inode->i_bdev);
Borislav Petkovea68d272008-07-23 19:56:01 +0200726 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 ret = -EBUSY;
728 goto out_put_floppy;
729 }
730 return 0;
731
732out_put_floppy:
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100733 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 ide_floppy_put(floppy);
735 return ret;
736}
737
738static int idefloppy_release(struct inode *inode, struct file *filp)
739{
740 struct gendisk *disk = inode->i_bdev->bd_disk;
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200741 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 ide_drive_t *drive = floppy->drive;
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100743
Borislav Petkov7b355722008-10-13 21:39:35 +0200744 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100746 if (floppy->openers == 1) {
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200747 ide_set_media_lock(drive, disk, 0);
Borislav Petkovea68d272008-07-23 19:56:01 +0200748 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 }
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100750
751 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
753 ide_floppy_put(floppy);
754
755 return 0;
756}
757
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800758static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
759{
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200760 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
761 ide_floppy_obj);
Christoph Hellwiga885c8c2006-01-08 01:02:50 -0800762 ide_drive_t *drive = floppy->drive;
763
764 geo->heads = drive->bios_head;
765 geo->sectors = drive->bios_sect;
766 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
767 return 0;
768}
769
Borislav Petkovea68d272008-07-23 19:56:01 +0200770static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
771 unsigned long arg, unsigned int cmd)
Borislav Petkov20bf7bd2008-02-02 19:56:35 +0100772{
Borislav Petkovea68d272008-07-23 19:56:01 +0200773 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200774 struct gendisk *disk = floppy->disk;
Bartlomiej Zolnierkiewicze996fc82008-10-10 22:39:37 +0200775 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
Borislav Petkovea68d272008-07-23 19:56:01 +0200776
Borislav Petkov20bf7bd2008-02-02 19:56:35 +0100777 if (floppy->openers > 1)
778 return -EBUSY;
779
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200780 ide_set_media_lock(drive, disk, prevent);
Borislav Petkov20bf7bd2008-02-02 19:56:35 +0100781
Bartlomiej Zolnierkiewicz0c8a6c72008-10-10 22:39:39 +0200782 if (cmd == CDROMEJECT)
783 ide_do_start_stop(drive, disk, 2);
Borislav Petkov20bf7bd2008-02-02 19:56:35 +0100784
785 return 0;
786}
787
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788static int idefloppy_ioctl(struct inode *inode, struct file *file,
789 unsigned int cmd, unsigned long arg)
790{
791 struct block_device *bdev = inode->i_bdev;
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200792 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
793 ide_floppy_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 ide_drive_t *drive = floppy->drive;
Borislav Petkov8e555122008-04-18 00:46:27 +0200795 struct ide_atapi_pc pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796 void __user *argp = (void __user *)arg;
Ondrej Zary07203f62005-11-10 00:25:15 +0100797 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Bartlomiej Zolnierkiewiczd56c99e2008-10-10 22:39:34 +0200799 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
Borislav Petkovea68d272008-07-23 19:56:01 +0200800 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801
Bartlomiej Zolnierkiewiczd56c99e2008-10-10 22:39:34 +0200802 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
803 if (err != -ENOTTY)
804 return err;
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +0200805
806 /*
807 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
808 * and CDROM_SEND_PACKET (legacy) ioctls
809 */
810 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
811 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
812 bdev->bd_disk, cmd, argp);
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +0200813
814 if (err == -ENOTTY)
815 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
816
817 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818}
819
820static int idefloppy_media_changed(struct gendisk *disk)
821{
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200822 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 ide_drive_t *drive = floppy->drive;
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100824 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825
826 /* do not scan partitions twice if this is a removable device */
827 if (drive->attach) {
828 drive->attach = 0;
829 return 0;
830 }
Borislav Petkovea68d272008-07-23 19:56:01 +0200831 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
832 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100833 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834}
835
836static int idefloppy_revalidate_disk(struct gendisk *disk)
837{
Borislav Petkov5aeddf92008-10-13 21:39:34 +0200838 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 set_capacity(disk, idefloppy_capacity(floppy->drive));
840 return 0;
841}
842
843static struct block_device_operations idefloppy_ops = {
Paolo Ciarrocchi52d3ccf2008-04-26 17:36:41 +0200844 .owner = THIS_MODULE,
845 .open = idefloppy_open,
846 .release = idefloppy_release,
847 .ioctl = idefloppy_ioctl,
848 .getgeo = idefloppy_getgeo,
849 .media_changed = idefloppy_media_changed,
850 .revalidate_disk = idefloppy_revalidate_disk
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851};
852
Russell King4031bbe2006-01-06 11:41:00 +0000853static int ide_floppy_probe(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854{
855 idefloppy_floppy_t *floppy;
856 struct gendisk *g;
857
858 if (!strstr("ide-floppy", drive->driver_req))
859 goto failed;
Bartlomiej Zolnierkiewicz2a924662008-10-10 22:39:24 +0200860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861 if (drive->media != ide_floppy)
862 goto failed;
Bartlomiej Zolnierkiewicz2a924662008-10-10 22:39:24 +0200863
Bartlomiej Zolnierkiewicz51509ee2008-10-10 22:39:34 +0200864 if (!ide_check_atapi_device(drive, DRV_NAME)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200865 printk(KERN_ERR PFX "%s: not supported by this version of "
866 DRV_NAME "\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867 goto failed;
868 }
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100869 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
870 if (!floppy) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200871 printk(KERN_ERR PFX "%s: Can't allocate a floppy structure\n",
872 drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 goto failed;
874 }
875
876 g = alloc_disk(1 << PARTN_BITS);
877 if (!g)
878 goto out_free_floppy;
879
880 ide_init_disk(g, drive);
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 kref_init(&floppy->kref);
883
884 floppy->drive = drive;
885 floppy->driver = &idefloppy_driver;
886 floppy->disk = g;
887
888 g->private_data = &floppy->driver;
889
890 drive->driver_data = floppy;
891
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100892 idefloppy_setup(drive, floppy);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 g->minors = 1 << PARTN_BITS;
895 g->driverfs_dev = &drive->gendev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
897 g->fops = &idefloppy_ops;
898 drive->attach = 1;
899 add_disk(g);
900 return 0;
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902out_free_floppy:
903 kfree(floppy);
904failed:
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200905 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906}
907
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100908static void __exit idefloppy_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909{
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200910 driver_unregister(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911}
912
Bartlomiej Zolnierkiewicz17514e82005-11-19 22:24:35 +0100913static int __init idefloppy_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914{
Borislav Petkov7b355722008-10-13 21:39:35 +0200915 printk(KERN_INFO DRV_NAME " driver " IDEFLOPPY_VERSION "\n");
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200916 return driver_register(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917}
918
Kay Sievers263756e2005-12-12 18:03:44 +0100919MODULE_ALIAS("ide:*m-floppy*");
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200920MODULE_ALIAS("ide-floppy");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921module_init(idefloppy_init);
922module_exit(idefloppy_exit);
923MODULE_LICENSE("GPL");
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100924MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
925