blob: 317ec62c33d42428f96e310e774d3c14eb75eb3d [file] [log] [blame]
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/types.h>
19#include <linux/string.h>
20#include <linux/kernel.h>
21#include <linux/delay.h>
22#include <linux/timer.h>
23#include <linux/mm.h>
24#include <linux/interrupt.h>
25#include <linux/major.h>
26#include <linux/errno.h>
27#include <linux/genhd.h>
28#include <linux/slab.h>
29#include <linux/cdrom.h>
30#include <linux/ide.h>
Bartlomiej Zolnierkiewicz3ceca722008-10-10 22:39:27 +020031#include <linux/hdreg.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/bitops.h>
Arjan van de Vencf8b8972006-03-23 03:00:45 -080033#include <linux/mutex.h>
Borislav Petkovb98b3402008-10-10 22:39:35 +020034#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +020036#include <scsi/scsi_ioctl.h>
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <asm/byteorder.h>
Borislav Petkov7e8b1632008-02-02 19:56:34 +010039#include <linux/irq.h>
40#include <linux/uaccess.h>
41#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <asm/unaligned.h>
43
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +020044#include "ide-floppy.h"
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010047 * After each failed packet command we issue a request sense command and retry
48 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 */
50#define IDEFLOPPY_MAX_PC_RETRIES 3
51
Borislav Petkov194ec0c2008-02-02 19:56:35 +010052/* format capacities descriptor codes */
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define CAPACITY_INVALID 0x00
54#define CAPACITY_UNFORMATTED 0x01
55#define CAPACITY_CURRENT 0x02
56#define CAPACITY_NO_CARTRIDGE 0x03
57
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +020058/*
59 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
60 * was apparently being deasserted before the unit was ready to receive data.
61 */
62#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
Borislav Petkov0571c7a2008-02-02 19:56:38 +010064/* Error code returned in rq->errors to the higher part of the driver. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#define IDEFLOPPY_ERROR_GENERAL 101
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010068 * Used to finish servicing a request. For read/write requests, we will call
69 * ide_end_request to pass to the next buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 */
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +020071static int ide_floppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +020073 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +010074 struct request *rq = drive->hwif->rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 int error;
76
Borislav Petkov7b355722008-10-13 21:39:35 +020077 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 switch (uptodate) {
Borislav Petkov7b355722008-10-13 21:39:35 +020080 case 0:
81 error = IDEFLOPPY_ERROR_GENERAL;
82 break;
83
84 case 1:
85 error = 0;
86 break;
87
88 default:
89 error = uptodate;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 }
Borislav Petkov7b355722008-10-13 21:39:35 +020091
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 if (error)
93 floppy->failed_pc = NULL;
94 /* Why does this happen? */
95 if (!rq)
96 return 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +020097 if (!blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 /* our real local end request function */
99 ide_end_request(drive, uptodate, nsecs);
100 return 0;
101 }
102 rq->errors = error;
103 /* fixme: need to move this local also */
104 ide_end_drive_cmd(drive, 0, 0);
105 return 0;
106}
107
Borislav Petkov8e555122008-04-18 00:46:27 +0200108static void idefloppy_update_buffers(ide_drive_t *drive,
109 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110{
111 struct request *rq = pc->rq;
112 struct bio *bio = rq->bio;
113
114 while ((bio = rq->bio) != NULL)
Bartlomiej Zolnierkiewiczc84d9bb2008-10-17 18:09:13 +0200115 ide_floppy_end_request(drive, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116}
117
Bartlomiej Zolnierkiewiczb14c7212008-10-13 21:39:30 +0200118static void ide_floppy_callback(ide_drive_t *drive, int dsc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200120 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200121 struct ide_atapi_pc *pc = drive->pc;
Borislav Petkov81f49382008-07-15 21:21:56 +0200122 int uptodate = pc->error ? 0 : 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Borislav Petkov7b355722008-10-13 21:39:35 +0200124 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100125
Bartlomiej Zolnierkiewiczdd2e9a02008-07-15 21:22:01 +0200126 if (floppy->failed_pc == pc)
127 floppy->failed_pc = NULL;
128
Borislav Petkov81f49382008-07-15 21:21:56 +0200129 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
130 (pc->rq && blk_pc_request(pc->rq)))
131 uptodate = 1; /* FIXME */
132 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200133 u8 *buf = pc->buf;
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100134
Borislav Petkov81f49382008-07-15 21:21:56 +0200135 if (!pc->error) {
136 floppy->sense_key = buf[2] & 0x0F;
137 floppy->asc = buf[12];
138 floppy->ascq = buf[13];
139 floppy->progress_indication = buf[15] & 0x80 ?
140 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
141
142 if (floppy->failed_pc)
Borislav Petkov7b355722008-10-13 21:39:35 +0200143 ide_debug_log(IDE_DBG_PC, "pc = %x, ",
144 floppy->failed_pc->c[0]);
Borislav Petkov81f49382008-07-15 21:21:56 +0200145
Borislav Petkov7b355722008-10-13 21:39:35 +0200146 ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
147 "ascq = %x\n", floppy->sense_key,
148 floppy->asc, floppy->ascq);
Borislav Petkov81f49382008-07-15 21:21:56 +0200149 } else
Borislav Petkov7b355722008-10-13 21:39:35 +0200150 printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
151 "Aborting request!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Bartlomiej Zolnierkiewiczc84d9bb2008-10-17 18:09:13 +0200154 ide_floppy_end_request(drive, uptodate, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155}
156
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200157static void ide_floppy_report_error(struct ide_disk_obj *floppy,
Borislav Petkov8e555122008-04-18 00:46:27 +0200158 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159{
Borislav Petkovd652c132008-02-02 19:56:35 +0100160 /* supress error messages resulting from Medium not present */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (floppy->sense_key == 0x02 &&
162 floppy->asc == 0x3a &&
163 floppy->ascq == 0x00)
Borislav Petkovd652c132008-02-02 19:56:35 +0100164 return;
165
Borislav Petkov7b355722008-10-13 21:39:35 +0200166 printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, "
Borislav Petkovd652c132008-02-02 19:56:35 +0100167 "asc = %2x, ascq = %2x\n",
168 floppy->drive->name, pc->c[0], floppy->sense_key,
169 floppy->asc, floppy->ascq);
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171}
172
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100173static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
Borislav Petkov8e555122008-04-18 00:46:27 +0200174 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200176 struct ide_disk_obj *floppy = drive->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 if (floppy->failed_pc == NULL &&
Borislav Petkov30d67092008-02-02 19:56:33 +0100179 pc->c[0] != GPCMD_REQUEST_SENSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 floppy->failed_pc = pc;
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 /* Set the current packet command */
Bartlomiej Zolnierkiewicz2b9efba2008-10-13 21:39:31 +0200183 drive->pc = pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Borislav Petkov757ced82008-02-02 19:56:37 +0100185 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100186 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
Borislav Petkov757ced82008-02-02 19:56:37 +0100187 ide_floppy_report_error(floppy, pc);
188 /* Giving up */
189 pc->error = IDEFLOPPY_ERROR_GENERAL;
190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 floppy->failed_pc = NULL;
Bartlomiej Zolnierkiewiczb14c7212008-10-13 21:39:30 +0200192 drive->pc_callback(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return ide_stopped;
194 }
195
Borislav Petkov7b355722008-10-13 21:39:35 +0200196 ide_debug_log(IDE_DBG_FUNC, "%s: Retry #%d\n", __func__, pc->retries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
198 pc->retries++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Borislav Petkov28ad91d2009-01-02 16:12:56 +0100200 return ide_issue_pc(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201}
202
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200203void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204{
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200205 ide_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100206 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 pc->c[7] = 255;
208 pc->c[8] = 255;
Borislav Petkov8e555122008-04-18 00:46:27 +0200209 pc->req_xfer = 255;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210}
211
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100212/* A mode sense command is used to "sense" floppy parameters. */
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200213void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
Borislav Petkov24a5d702008-02-02 19:56:34 +0100215 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100216
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200217 ide_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100218 pc->c[0] = GPCMD_MODE_SENSE_10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 pc->c[1] = 0;
Bartlomiej Zolnierkiewicz4de4b9e2008-10-10 22:39:36 +0200220 pc->c[2] = page_code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221
222 switch (page_code) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100223 case IDEFLOPPY_CAPABILITIES_PAGE:
224 length += 12;
225 break;
226 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
227 length += 32;
228 break;
229 default:
Borislav Petkov7b355722008-10-13 21:39:35 +0200230 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
Borislav Petkov8f622432008-02-02 19:56:33 +0100232 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
Borislav Petkov8e555122008-04-18 00:46:27 +0200233 pc->req_xfer = length;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234}
235
Borislav Petkov7b355722008-10-13 21:39:35 +0200236static void idefloppy_create_rw_cmd(ide_drive_t *drive,
Borislav Petkov8e555122008-04-18 00:46:27 +0200237 struct ide_atapi_pc *pc, struct request *rq,
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100238 unsigned long sector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200240 struct ide_disk_obj *floppy = drive->driver_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 int block = sector / floppy->bs_factor;
242 int blocks = rq->nr_sectors / floppy->bs_factor;
243 int cmd = rq_data_dir(rq);
244
Borislav Petkov7b355722008-10-13 21:39:35 +0200245 ide_debug_log(IDE_DBG_FUNC, "%s: block: %d, blocks: %d\n", __func__,
246 block, blocks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200248 ide_init_pc(pc);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100249 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
250 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
Borislav Petkov8f622432008-02-02 19:56:33 +0100251 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100252
Borislav Petkov20cd93be2008-07-23 19:56:00 +0200253 memcpy(rq->cmd, pc->c, 12);
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 pc->rq = rq;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200256 pc->b_count = 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200257 if (rq->cmd_flags & REQ_RW)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100258 pc->flags |= PC_FLAG_WRITING;
Borislav Petkov8e555122008-04-18 00:46:27 +0200259 pc->buf = NULL;
260 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
Bartlomiej Zolnierkiewicz5e331092008-07-15 21:21:56 +0200261 pc->flags |= PC_FLAG_DMA_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262}
263
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200264static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
Borislav Petkov8e555122008-04-18 00:46:27 +0200265 struct ide_atapi_pc *pc, struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266{
Bartlomiej Zolnierkiewicz7bf74202008-10-10 22:39:37 +0200267 ide_init_pc(pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 memcpy(pc->c, rq->cmd, sizeof(pc->c));
Jens Axboe3d6392c2007-07-09 12:38:05 +0200269 pc->rq = rq;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200270 pc->b_count = 0;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200271 if (rq->data_len && rq_data_dir(rq) == WRITE)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100272 pc->flags |= PC_FLAG_WRITING;
Borislav Petkov8e555122008-04-18 00:46:27 +0200273 pc->buf = rq->data;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200274 if (rq->bio)
Bartlomiej Zolnierkiewicz5e331092008-07-15 21:21:56 +0200275 pc->flags |= PC_FLAG_DMA_OK;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200276 /*
277 * possibly problematic, doesn't look like ide-floppy correctly
278 * handled scattered requests if dma fails...
279 */
Borislav Petkov8e555122008-04-18 00:46:27 +0200280 pc->req_xfer = pc->buf_size = rq->data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200283static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
284 struct request *rq, sector_t block)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200286 struct ide_disk_obj *floppy = drive->driver_data;
Borislav Petkovb98b3402008-10-10 22:39:35 +0200287 ide_hwif_t *hwif = drive->hwif;
Borislav Petkov8e555122008-04-18 00:46:27 +0200288 struct ide_atapi_pc *pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Borislav Petkov7b355722008-10-13 21:39:35 +0200290 ide_debug_log(IDE_DBG_FUNC, "%s: dev: %s, cmd: 0x%x, cmd_type: %x, "
291 "errors: %d\n",
292 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
293 rq->cmd[0], rq->cmd_type, rq->errors);
Borislav Petkovb98b3402008-10-10 22:39:35 +0200294
Borislav Petkov7b355722008-10-13 21:39:35 +0200295 ide_debug_log(IDE_DBG_FUNC, "%s: sector: %ld, nr_sectors: %ld, "
296 "current_nr_sectors: %d\n",
297 __func__, (long)rq->sector, rq->nr_sectors,
298 rq->current_nr_sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299
300 if (rq->errors >= ERROR_MAX) {
Borislav Petkovd652c132008-02-02 19:56:35 +0100301 if (floppy->failed_pc)
302 ide_floppy_report_error(floppy, floppy->failed_pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 else
Borislav Petkov7b355722008-10-13 21:39:35 +0200304 printk(KERN_ERR PFX "%s: I/O error\n", drive->name);
305
Bartlomiej Zolnierkiewiczc84d9bb2008-10-17 18:09:13 +0200306 ide_floppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 return ide_stopped;
308 }
Jens Axboe4aff5e22006-08-10 08:44:47 +0200309 if (blk_fs_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 if (((long)rq->sector % floppy->bs_factor) ||
311 (rq->nr_sectors % floppy->bs_factor)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200312 printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
313 drive->name);
Bartlomiej Zolnierkiewiczc84d9bb2008-10-17 18:09:13 +0200314 ide_floppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 return ide_stopped;
316 }
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200317 pc = &floppy->queued_pc;
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200318 idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200319 } else if (blk_special_request(rq)) {
Borislav Petkov8e555122008-04-18 00:46:27 +0200320 pc = (struct ide_atapi_pc *) rq->buffer;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200321 } else if (blk_pc_request(rq)) {
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200322 pc = &floppy->queued_pc;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200323 idefloppy_blockpc_cmd(floppy, pc, rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 } else {
Borislav Petkov7b355722008-10-13 21:39:35 +0200325 blk_dump_rq_flags(rq, PFX "unsupported command in queue");
Bartlomiej Zolnierkiewiczc84d9bb2008-10-17 18:09:13 +0200326 ide_floppy_end_request(drive, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 return ide_stopped;
328 }
329
Borislav Petkov3eb76c12009-03-13 21:16:12 +0100330 if (blk_fs_request(rq) || pc->req_xfer) {
331 ide_init_sg_cmd(drive, rq);
332 ide_map_sg(drive, rq);
333 }
Borislav Petkovb98b3402008-10-10 22:39:35 +0200334
335 pc->sg = hwif->sg_table;
336 pc->sg_cnt = hwif->sg_nents;
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 pc->rq = rq;
Bartlomiej Zolnierkiewicz5d418932008-07-15 21:21:57 +0200339
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 return idefloppy_issue_pc(drive, pc);
341}
342
343/*
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100344 * Look at the flexible disk page parameters. We ignore the CHS capacity
345 * parameters and use the LBA parameters instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 */
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100347static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
348 struct ide_atapi_pc *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200350 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200351 struct gendisk *disk = floppy->disk;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100352 u8 *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 int capacity, lba_capacity;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100354 u16 transfer_rate, sector_size, cyls, rpm;
355 u8 heads, sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100357 ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100358
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100359 if (ide_queue_pc_tail(drive, disk, pc)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200360 printk(KERN_ERR PFX "Can't get flexible disk page params\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 return 1;
362 }
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200363
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100364 if (pc->buf[3] & 0x80)
Bartlomiej Zolnierkiewiczda167872008-10-17 18:09:11 +0200365 drive->dev_flags |= IDE_DFLAG_WP;
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200366 else
Bartlomiej Zolnierkiewiczda167872008-10-17 18:09:11 +0200367 drive->dev_flags &= ~IDE_DFLAG_WP;
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200368
Bartlomiej Zolnierkiewiczda167872008-10-17 18:09:11 +0200369 set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));
Bartlomiej Zolnierkiewicz49cac392008-10-10 22:39:38 +0200370
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100371 page = &pc->buf[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100373 transfer_rate = be16_to_cpup((__be16 *)&pc->buf[8 + 2]);
374 sector_size = be16_to_cpup((__be16 *)&pc->buf[8 + 6]);
375 cyls = be16_to_cpup((__be16 *)&pc->buf[8 + 8]);
376 rpm = be16_to_cpup((__be16 *)&pc->buf[8 + 28]);
377 heads = pc->buf[8 + 4];
378 sectors = pc->buf[8 + 5];
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100379
380 capacity = cyls * heads * sectors * sector_size;
381
382 if (memcmp(page, &floppy->flexible_disk_page, 32))
Borislav Petkov7b355722008-10-13 21:39:35 +0200383 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 "%d sector size, %d rpm\n",
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100385 drive->name, capacity / 1024, cyls, heads,
386 sectors, transfer_rate / 8, sector_size, rpm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100388 memcpy(&floppy->flexible_disk_page, page, 32);
389 drive->bios_cyl = cyls;
390 drive->bios_head = heads;
391 drive->bios_sect = sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 lba_capacity = floppy->blocks * floppy->block_size;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 if (capacity < lba_capacity) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200395 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 "bytes, but the drive only handles %d\n",
397 drive->name, lba_capacity, capacity);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100398 floppy->blocks = floppy->block_size ?
399 capacity / floppy->block_size : 0;
Bartlomiej Zolnierkiewicz6f840832008-10-17 18:09:10 +0200400 drive->capacity64 = floppy->blocks * floppy->bs_factor;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 }
Bartlomiej Zolnierkiewicz6f840832008-10-17 18:09:10 +0200402
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 return 0;
404}
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406/*
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100407 * Determine if a media is present in the floppy drive, and if so, its LBA
408 * capacity.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 */
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200410static int ide_floppy_get_capacity(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Bartlomiej Zolnierkiewicz0df96272008-10-17 18:09:16 +0200412 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200413 struct gendisk *disk = floppy->disk;
Borislav Petkov8e555122008-04-18 00:46:27 +0200414 struct ide_atapi_pc pc;
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100415 u8 *cap_desc;
416 u8 header_len, desc_cnt;
417 int i, rc = 1, blocks, length;
418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 drive->bios_cyl = 0;
420 drive->bios_head = drive->bios_sect = 0;
Alan Coxfdb77da2007-02-17 02:40:20 +0100421 floppy->blocks = 0;
422 floppy->bs_factor = 1;
Bartlomiej Zolnierkiewicz6f840832008-10-17 18:09:10 +0200423 drive->capacity64 = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Bartlomiej Zolnierkiewicz01278542008-10-10 22:39:38 +0200425 ide_floppy_create_read_capacity_cmd(&pc);
Bartlomiej Zolnierkiewicz2ac07d92008-10-10 22:39:38 +0200426 if (ide_queue_pc_tail(drive, disk, &pc)) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200427 printk(KERN_ERR PFX "Can't get floppy parameters\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 return 1;
429 }
Borislav Petkov8e555122008-04-18 00:46:27 +0200430 header_len = pc.buf[3];
431 cap_desc = &pc.buf[4];
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100432 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100434 for (i = 0; i < desc_cnt; i++) {
435 unsigned int desc_start = 4 + i*8;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436
Harvey Harrison85ae98a32008-07-16 20:33:47 +0200437 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
438 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100439
Borislav Petkov7b355722008-10-13 21:39:35 +0200440 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
441 "%d sector size\n",
442 i, blocks * length / 1024, blocks, length);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100443
444 if (i)
445 continue;
446 /*
447 * the code below is valid only for the 1st descriptor, ie i=0
448 */
449
Borislav Petkov8e555122008-04-18 00:46:27 +0200450 switch (pc.buf[desc_start + 4] & 0x03) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 /* Clik! drive returns this instead of CAPACITY_CURRENT */
452 case CAPACITY_UNFORMATTED:
Borislav Petkovea68d272008-07-23 19:56:01 +0200453 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100454 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 * If it is not a clik drive, break out
456 * (maintains previous driver behaviour)
457 */
458 break;
459 case CAPACITY_CURRENT:
460 /* Normal Zip/LS-120 disks */
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100461 if (memcmp(cap_desc, &floppy->cap_desc, 8))
Borislav Petkov7b355722008-10-13 21:39:35 +0200462 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
463 "sector size\n",
464 drive->name, blocks * length / 1024,
465 blocks, length);
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100466 memcpy(&floppy->cap_desc, cap_desc, 8);
467
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 if (!length || length % 512) {
Borislav Petkov7b355722008-10-13 21:39:35 +0200469 printk(KERN_NOTICE PFX "%s: %d bytes block size"
470 " not supported\n", drive->name, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 } else {
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100472 floppy->blocks = blocks;
473 floppy->block_size = length;
474 floppy->bs_factor = length / 512;
475 if (floppy->bs_factor != 1)
Borislav Petkov7b355722008-10-13 21:39:35 +0200476 printk(KERN_NOTICE PFX "%s: Warning: "
477 "non 512 bytes block size not "
478 "fully supported\n",
479 drive->name);
Bartlomiej Zolnierkiewicz6f840832008-10-17 18:09:10 +0200480 drive->capacity64 =
481 floppy->blocks * floppy->bs_factor;
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100482 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 }
484 break;
485 case CAPACITY_NO_CARTRIDGE:
486 /*
487 * This is a KERN_ERR so it appears on screen
488 * for the user to see
489 */
Borislav Petkov7b355722008-10-13 21:39:35 +0200490 printk(KERN_ERR PFX "%s: No disk in drive\n",
491 drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 break;
493 case CAPACITY_INVALID:
Borislav Petkov7b355722008-10-13 21:39:35 +0200494 printk(KERN_ERR PFX "%s: Invalid capacity for disk "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 "in drive\n", drive->name);
496 break;
497 }
Borislav Petkov7b355722008-10-13 21:39:35 +0200498 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d\n",
499 pc.buf[desc_start + 4] & 0x03);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 }
501
502 /* Clik! disk does not support get_flexible_disk_page */
Borislav Petkovea68d272008-07-23 19:56:01 +0200503 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
Linus Torvalds07bd3f42009-01-02 16:12:51 +0100504 (void) ide_floppy_get_flexible_disk_page(drive, &pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 return rc;
507}
508
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200509static void ide_floppy_setup(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510{
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200511 struct ide_disk_obj *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200512 u16 *id = drive->id;
Bartlomiej Zolnierkiewicz2e8a6f82008-10-10 22:39:36 +0200513
Bartlomiej Zolnierkiewicz85e39032008-10-13 21:39:32 +0200514 drive->pc_callback = ide_floppy_callback;
515 drive->pc_update_buffers = idefloppy_update_buffers;
516 drive->pc_io_buffers = ide_io_buffers;
Borislav Petkov3ad67762008-04-18 00:46:25 +0200517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100519 * We used to check revisions here. At this point however I'm giving up.
520 * Just assume they are all broken, its easier.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 *
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100522 * The actual reason for the workarounds was likely a driver bug after
523 * all rather than a firmware bug, and the workaround below used to hide
524 * it. It should be fixed as of version 1.9, but to be on the safe side
525 * we'll leave the limitation below for the 2.2.x tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200527 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
Borislav Petkovea68d272008-07-23 19:56:01 +0200528 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* This value will be visible in the /proc/ide/hdx/settings */
Bartlomiej Zolnierkiewiczbaf08f02008-10-13 21:39:32 +0200530 drive->pc_delay = IDEFLOPPY_PC_DELAY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 blk_queue_max_sectors(drive->queue, 64);
532 }
533
534 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100535 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
536 * nasty clicking noises without it, so please don't remove this.
537 */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200538 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 blk_queue_max_sectors(drive->queue, 64);
Borislav Petkovea68d272008-07-23 19:56:01 +0200540 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
Bartlomiej Zolnierkiewicz05780422008-10-10 22:39:38 +0200541 /* IOMEGA Clik! drives do not support lock/unlock commands */
Bartlomiej Zolnierkiewicz42619d32008-10-17 18:09:11 +0200542 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 }
544
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100545 (void) ide_floppy_get_capacity(drive);
Bartlomiej Zolnierkiewicz1e874f42008-10-10 22:39:27 +0200546
547 ide_proc_register_driver(drive, floppy->driver);
Bartlomiej Zolnierkiewiczae9f9f02008-10-17 18:09:10 +0200548
549 drive->dev_flags |= IDE_DFLAG_ATTACH;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550}
Bartlomiej Zolnierkiewicz806f80a2008-10-17 18:09:14 +0200551
552static void ide_floppy_flush(ide_drive_t *drive)
553{
554}
555
556static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
557{
558 int ret = 0;
559
560 if (ide_do_test_unit_ready(drive, disk))
561 ide_do_start_stop(drive, disk, 1);
562
563 ret = ide_floppy_get_capacity(drive);
564
565 set_capacity(disk, ide_gd_capacity(drive));
566
567 return ret;
568}
569
570const struct ide_disk_ops ide_atapi_disk_ops = {
571 .check = ide_check_atapi_device,
572 .get_capacity = ide_floppy_get_capacity,
573 .setup = ide_floppy_setup,
574 .flush = ide_floppy_flush,
575 .init_media = ide_floppy_init_media,
576 .set_doorlock = ide_set_media_lock,
577 .do_request = ide_floppy_do_request,
578 .end_request = ide_floppy_end_request,
579 .ioctl = ide_floppy_ioctl,
580};