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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
Borislav Petkovfc6c5bc2008-02-02 19:56:38 +010018#define IDEFLOPPY_VERSION "1.00"
Linus Torvalds1da177e2005-04-16 15:20:36 -070019
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/string.h>
23#include <linux/kernel.h>
24#include <linux/delay.h>
25#include <linux/timer.h>
26#include <linux/mm.h>
27#include <linux/interrupt.h>
28#include <linux/major.h>
29#include <linux/errno.h>
30#include <linux/genhd.h>
31#include <linux/slab.h>
32#include <linux/cdrom.h>
33#include <linux/ide.h>
34#include <linux/bitops.h>
Arjan van de Vencf8b8972006-03-23 03:00:45 -080035#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +020037#include <scsi/scsi_ioctl.h>
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <asm/byteorder.h>
Borislav Petkov7e8b1632008-02-02 19:56:34 +010040#include <linux/irq.h>
41#include <linux/uaccess.h>
42#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#include <asm/unaligned.h>
44
Borislav Petkovf373bd82008-02-02 19:56:36 +010045/* define to see debug info */
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#define IDEFLOPPY_DEBUG_LOG 0
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
Borislav Petkov0571c7a2008-02-02 19:56:38 +010049#define IDEFLOPPY_DEBUG(fmt, args...)
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
51#if IDEFLOPPY_DEBUG_LOG
Borislav Petkovbcc77d92008-02-02 19:56:34 +010052#define debug_log(fmt, args...) \
53 printk(KERN_INFO "ide-floppy: " fmt, ## args)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#else
Borislav Petkov0571c7a2008-02-02 19:56:38 +010055#define debug_log(fmt, args...) do {} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#endif
57
58
Borislav Petkov0571c7a2008-02-02 19:56:38 +010059/* Some drives require a longer irq timeout. */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
61
62/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010063 * After each failed packet command we issue a request sense command and retry
64 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
66#define IDEFLOPPY_MAX_PC_RETRIES 3
67
68/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010069 * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
70 * bytes.
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 */
72#define IDEFLOPPY_PC_BUFFER_SIZE 256
73
74/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +010075 * In various places in the driver, we need to allocate storage for packet
76 * commands and requests, which will remain valid while we leave the driver to
77 * wait for an interrupt or a timeout event.
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 */
79#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081typedef struct idefloppy_packet_command_s {
82 u8 c[12]; /* Actual packet bytes */
Borislav Petkov0571c7a2008-02-02 19:56:38 +010083 int retries; /* On each retry, we increment
84 retries */
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 int error; /* Error code */
86 int request_transfer; /* Bytes to transfer */
87 int actually_transferred; /* Bytes actually transferred */
88 int buffer_size; /* Size of our data buffer */
Borislav Petkov0571c7a2008-02-02 19:56:38 +010089 int b_count; /* Missing/Available data on
90 the current buffer */
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 struct request *rq; /* The corresponding request */
92 u8 *buffer; /* Data buffer */
Borislav Petkov0571c7a2008-02-02 19:56:38 +010093 u8 *current_position; /* Pointer into above buffer */
94 void (*callback) (ide_drive_t *); /* Called when this packet
95 command is completed */
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
Borislav Petkov0571c7a2008-02-02 19:56:38 +010097 unsigned long flags; /* Status/Action bit flags: long
98 for set_bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099} idefloppy_pc_t;
100
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100101/* Packet command flag bits. */
102enum {
103 /* 1 when we prefer to use DMA if possible */
104 PC_FLAG_DMA_RECOMMENDED = (1 << 0),
105 /* 1 while DMA in progress */
106 PC_FLAG_DMA_IN_PROGRESS = (1 << 1),
107 /* 1 when encountered problem during DMA */
108 PC_FLAG_DMA_ERROR = (1 << 2),
109 /* Data direction */
110 PC_FLAG_WRITING = (1 << 3),
111 /* Suppress error reporting */
112 PC_FLAG_SUPPRESS_ERROR = (1 << 4),
113};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100115/* format capacities descriptor codes */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116#define CAPACITY_INVALID 0x00
117#define CAPACITY_UNFORMATTED 0x01
118#define CAPACITY_CURRENT 0x02
119#define CAPACITY_NO_CARTRIDGE 0x03
120
121/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100122 * Most of our global data which we need to save even as we leave the driver
123 * due to an interrupt or a timer event is stored in a variable of type
124 * idefloppy_floppy_t, defined below.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 */
126typedef struct ide_floppy_obj {
127 ide_drive_t *drive;
128 ide_driver_t *driver;
129 struct gendisk *disk;
130 struct kref kref;
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +0100131 unsigned int openers; /* protected by BKL for now */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133 /* Current packet command */
134 idefloppy_pc_t *pc;
135 /* Last failed packet command */
136 idefloppy_pc_t *failed_pc;
137 /* Packet command stack */
138 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
139 /* Next free packet command storage space */
140 int pc_stack_index;
141 struct request rq_stack[IDEFLOPPY_PC_STACK];
142 /* We implement a circular array */
143 int rq_stack_index;
144
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100145 /* Last error information */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 u8 sense_key, asc, ascq;
147 /* delay this long before sending packet command */
148 u8 ticks;
149 int progress_indication;
150
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100151 /* Device information */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 /* Current format */
153 int blocks, block_size, bs_factor;
Borislav Petkov194ec0c2008-02-02 19:56:35 +0100154 /* Last format capacity descriptor */
155 u8 cap_desc[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 /* Copy of the flexible disk page */
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100157 u8 flexible_disk_page[32];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 /* Write protect */
159 int wp;
160 /* Supports format progress report */
161 int srfp;
162 /* Status/Action flags */
163 unsigned long flags;
164} idefloppy_floppy_t;
165
Bartlomiej Zolnierkiewiczc40d3d32005-08-18 22:09:21 +0200166#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100168/* Floppy flag bits values. */
169enum {
170 /* DRQ interrupt device */
171 IDEFLOPPY_FLAG_DRQ_INTERRUPT = (1 << 0),
172 /* Media may have changed */
173 IDEFLOPPY_FLAG_MEDIA_CHANGED = (1 << 1),
174 /* Format in progress */
175 IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS = (1 << 2),
176 /* Avoid commands not supported in Clik drive */
177 IDEFLOPPY_FLAG_CLIK_DRIVE = (1 << 3),
178 /* Requires BH algorithm for packets */
179 IDEFLOPPY_FLAG_ZIP_DRIVE = (1 << 4),
180};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100182/* Defines for the MODE SENSE command */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183#define MODE_SENSE_CURRENT 0x00
184#define MODE_SENSE_CHANGEABLE 0x01
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100185#define MODE_SENSE_DEFAULT 0x02
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186#define MODE_SENSE_SAVED 0x03
187
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100188/* IOCTLs used in low-level formatting. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
190#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
191#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
192#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
193
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100194/* Error code returned in rq->errors to the higher part of the driver. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195#define IDEFLOPPY_ERROR_GENERAL 101
196
197/*
Borislav Petkov948391d2008-02-02 19:56:34 +0100198 * Pages of the SELECT SENSE / MODE SENSE packet commands.
199 * See SFF-8070i spec.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 */
201#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
202#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
203
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800204static DEFINE_MUTEX(idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205
206#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
207
208#define ide_floppy_g(disk) \
209 container_of((disk)->private_data, struct ide_floppy_obj, driver)
210
211static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
212{
213 struct ide_floppy_obj *floppy = NULL;
214
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800215 mutex_lock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 floppy = ide_floppy_g(disk);
217 if (floppy)
218 kref_get(&floppy->kref);
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800219 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 return floppy;
221}
222
Borislav Petkov9a24b632008-02-02 19:56:33 +0100223static void idefloppy_cleanup_obj(struct kref *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225static void ide_floppy_put(struct ide_floppy_obj *floppy)
226{
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800227 mutex_lock(&idefloppy_ref_mutex);
Borislav Petkov9a24b632008-02-02 19:56:33 +0100228 kref_put(&floppy->kref, idefloppy_cleanup_obj);
Arjan van de Vencf8b8972006-03-23 03:00:45 -0800229 mutex_unlock(&idefloppy_ref_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
232/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100233 * Too bad. The drive wants to send us data which we are not ready to accept.
234 * Just throw it away.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100236static void idefloppy_discard_data(ide_drive_t *drive, unsigned int bcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
238 while (bcount--)
239 (void) HWIF(drive)->INB(IDE_DATA_REG);
240}
241
Borislav Petkov0bf399e2008-02-02 19:56:36 +0100242static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
244 while (bcount--)
245 HWIF(drive)->OUTB(0, IDE_DATA_REG);
246}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
248
249/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100250 * Used to finish servicing a request. For read/write requests, we will call
251 * ide_end_request to pass to the next buffer.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 */
253static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
254{
255 idefloppy_floppy_t *floppy = drive->driver_data;
256 struct request *rq = HWGROUP(drive)->rq;
257 int error;
258
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100259 debug_log("Reached %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 switch (uptodate) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100262 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
263 case 1: error = 0; break;
264 default: error = uptodate;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 }
266 if (error)
267 floppy->failed_pc = NULL;
268 /* Why does this happen? */
269 if (!rq)
270 return 0;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200271 if (!blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 /* our real local end request function */
273 ide_end_request(drive, uptodate, nsecs);
274 return 0;
275 }
276 rq->errors = error;
277 /* fixme: need to move this local also */
278 ide_end_drive_cmd(drive, 0, 0);
279 return 0;
280}
281
Borislav Petkov32925e12008-02-02 19:56:36 +0100282static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
283 unsigned int bcount, int direction)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284{
285 struct request *rq = pc->rq;
NeilBrown5705f702007-09-25 12:35:59 +0200286 struct req_iterator iter;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 struct bio_vec *bvec;
288 unsigned long flags;
NeilBrown5705f702007-09-25 12:35:59 +0200289 int count, done = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 char *data;
291
NeilBrown5705f702007-09-25 12:35:59 +0200292 rq_for_each_segment(bvec, rq, iter) {
Jens Axboe6c92e692007-08-16 13:43:12 +0200293 if (!bcount)
294 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
Jens Axboe6c92e692007-08-16 13:43:12 +0200296 count = min(bvec->bv_len, bcount);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
Jens Axboe6c92e692007-08-16 13:43:12 +0200298 data = bvec_kmap_irq(bvec, &flags);
Borislav Petkov32925e12008-02-02 19:56:36 +0100299 if (direction)
300 drive->hwif->atapi_output_bytes(drive, data, count);
301 else
302 drive->hwif->atapi_input_bytes(drive, data, count);
Jens Axboe6c92e692007-08-16 13:43:12 +0200303 bvec_kunmap_irq(data, &flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Jens Axboe6c92e692007-08-16 13:43:12 +0200305 bcount -= count;
306 pc->b_count += count;
307 done += count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
309
310 idefloppy_do_end_request(drive, 1, done >> 9);
311
312 if (bcount) {
Borislav Petkov32925e12008-02-02 19:56:36 +0100313 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
314 drive->name, __func__, bcount);
315 if (direction)
316 idefloppy_write_zeros(drive, bcount);
317 else
318 idefloppy_discard_data(drive, bcount);
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 }
321}
322
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100323static void idefloppy_update_buffers(ide_drive_t *drive, idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324{
325 struct request *rq = pc->rq;
326 struct bio *bio = rq->bio;
327
328 while ((bio = rq->bio) != NULL)
329 idefloppy_do_end_request(drive, 1, 0);
330}
331
332/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100333 * Generate a new packet command request in front of the request queue, before
334 * the current request so that it will be processed immediately, on the next
335 * pass through the driver.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100337static void idefloppy_queue_pc_head(ide_drive_t *drive, idefloppy_pc_t *pc,
338 struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339{
340 struct ide_floppy_obj *floppy = drive->driver_data;
341
342 ide_init_drive_cmd(rq);
343 rq->buffer = (char *) pc;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200344 rq->cmd_type = REQ_TYPE_SPECIAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 rq->rq_disk = floppy->disk;
346 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
347}
348
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100349static idefloppy_pc_t *idefloppy_next_pc_storage(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350{
351 idefloppy_floppy_t *floppy = drive->driver_data;
352
353 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100354 floppy->pc_stack_index = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return (&floppy->pc_stack[floppy->pc_stack_index++]);
356}
357
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100358static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
360 idefloppy_floppy_t *floppy = drive->driver_data;
361
362 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
363 floppy->rq_stack_index = 0;
364 return (&floppy->rq_stack[floppy->rq_stack_index++]);
365}
366
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100367static void idefloppy_request_sense_callback(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368{
369 idefloppy_floppy_t *floppy = drive->driver_data;
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100370 u8 *buf = floppy->pc->buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100372 debug_log("Reached %s\n", __func__);
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 if (!floppy->pc->error) {
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100375 floppy->sense_key = buf[2] & 0x0F;
376 floppy->asc = buf[12];
377 floppy->ascq = buf[13];
378 floppy->progress_indication = buf[15] & 0x80 ?
379 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
380
381 if (floppy->failed_pc)
382 debug_log("pc = %x, sense key = %x, asc = %x,"
383 " ascq = %x\n",
384 floppy->failed_pc->c[0],
385 floppy->sense_key,
386 floppy->asc,
387 floppy->ascq);
388 else
389 debug_log("sense key = %x, asc = %x, ascq = %x\n",
390 floppy->sense_key,
391 floppy->asc,
392 floppy->ascq);
393
394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 idefloppy_do_end_request(drive, 1, 0);
396 } else {
Borislav Petkova6ff2d32008-02-02 19:56:34 +0100397 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
398 " request!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 idefloppy_do_end_request(drive, 0, 0);
400 }
401}
402
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100403/* General packet command callback function. */
404static void idefloppy_pc_callback(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405{
406 idefloppy_floppy_t *floppy = drive->driver_data;
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100407
408 debug_log("Reached %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
410 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
411}
412
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100413static void idefloppy_init_pc(idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
415 memset(pc->c, 0, 12);
416 pc->retries = 0;
417 pc->flags = 0;
418 pc->request_transfer = 0;
419 pc->buffer = pc->pc_buffer;
420 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
421 pc->callback = &idefloppy_pc_callback;
422}
423
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100424static void idefloppy_create_request_sense_cmd(idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425{
Borislav Petkov30d67092008-02-02 19:56:33 +0100426 idefloppy_init_pc(pc);
427 pc->c[0] = GPCMD_REQUEST_SENSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 pc->c[4] = 255;
429 pc->request_transfer = 18;
430 pc->callback = &idefloppy_request_sense_callback;
431}
432
433/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100434 * Called when an error was detected during the last packet command. We queue a
435 * request sense packet command in the head of the request list.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100437static void idefloppy_retry_pc(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
439 idefloppy_pc_t *pc;
440 struct request *rq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
Bartlomiej Zolnierkiewicz64a57fe2008-02-06 02:57:51 +0100442 (void)ide_read_error(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 pc = idefloppy_next_pc_storage(drive);
444 rq = idefloppy_next_rq_storage(drive);
445 idefloppy_create_request_sense_cmd(pc);
446 idefloppy_queue_pc_head(drive, pc, rq);
447}
448
Borislav Petkov0eea6452008-02-02 19:56:36 +0100449/* The usual interrupt handler called during a packet command. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
451{
452 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100453 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 idefloppy_pc_t *pc = floppy->pc;
455 struct request *rq = pc->rq;
Borislav Petkov0eea6452008-02-02 19:56:36 +0100456 xfer_func_t *xferfunc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 unsigned int temp;
Borislav Petkovd30a7fb2008-02-02 19:56:35 +0100458 int dma_error = 0;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100459 u16 bcount;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100460 u8 stat, ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100462 debug_log("Reached %s interrupt handler\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100464 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
Borislav Petkovd30a7fb2008-02-02 19:56:35 +0100465 dma_error = hwif->ide_dma_end(drive);
466 if (dma_error) {
467 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
468 rq_data_dir(rq) ? "write" : "read");
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100469 pc->flags |= PC_FLAG_DMA_ERROR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 } else {
471 pc->actually_transferred = pc->request_transfer;
472 idefloppy_update_buffers(drive, pc);
473 }
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100474 debug_log("DMA finished\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 }
476
477 /* Clear the interrupt */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100478 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100480 /* No more interrupts */
481 if ((stat & DRQ_STAT) == 0) {
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100482 debug_log("Packet command completed, %d bytes transferred\n",
483 pc->actually_transferred);
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100484 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Ingo Molnar366c7f52006-07-03 00:25:25 -0700486 local_irq_enable_in_hardirq();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100488 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 /* Error detected */
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100490 debug_log("%s: I/O error\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 rq->errors++;
Borislav Petkov30d67092008-02-02 19:56:33 +0100492 if (pc->c[0] == GPCMD_REQUEST_SENSE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 printk(KERN_ERR "ide-floppy: I/O error in "
494 "request sense command\n");
495 return ide_do_reset(drive);
496 }
497 /* Retry operation */
498 idefloppy_retry_pc(drive);
499 /* queued, but not started */
500 return ide_stopped;
501 }
502 pc->error = 0;
503 if (floppy->failed_pc == pc)
504 floppy->failed_pc = NULL;
505 /* Command finished - Call the callback function */
506 pc->callback(drive);
507 return ide_stopped;
508 }
509
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100510 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
511 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
513 "more interrupts in DMA mode\n");
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100514 ide_dma_off(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 return ide_do_reset(drive);
516 }
517
518 /* Get the number of bytes to transfer */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100519 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
520 hwif->INB(IDE_BCOUNTL_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 /* on this interrupt */
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100522 ireason = hwif->INB(IDE_IREASON_REG);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100524 if (ireason & CD) {
Borislav Petkov0eea6452008-02-02 19:56:36 +0100525 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 return ide_do_reset(drive);
527 }
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100528 if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 /* Hopefully, we will never get here */
530 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100531 (ireason & IO) ? "Write" : "Read");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 printk(KERN_ERR "but the floppy wants us to %s !\n",
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100533 (ireason & IO) ? "Read" : "Write");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 return ide_do_reset(drive);
535 }
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100536 if (!(pc->flags & PC_FLAG_WRITING)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 /* Reading - Check that we have enough space */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100538 temp = pc->actually_transferred + bcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 if (temp > pc->request_transfer) {
540 if (temp > pc->buffer_size) {
541 printk(KERN_ERR "ide-floppy: The floppy wants "
542 "to send us more data than expected "
543 "- discarding data\n");
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100544 idefloppy_discard_data(drive, bcount);
Borislav Petkov0078df22008-02-02 19:56:33 +0100545
Linus Torvalds1da177e2005-04-16 15:20:36 -0700546 ide_set_handler(drive,
547 &idefloppy_pc_intr,
548 IDEFLOPPY_WAIT_CMD,
549 NULL);
550 return ide_started;
551 }
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100552 debug_log("The floppy wants to send us more data than"
553 " expected - allowing transfer\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 }
555 }
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100556 if (pc->flags & PC_FLAG_WRITING)
Borislav Petkov0eea6452008-02-02 19:56:36 +0100557 xferfunc = hwif->atapi_output_bytes;
Borislav Petkov32925e12008-02-02 19:56:36 +0100558 else
Borislav Petkov0eea6452008-02-02 19:56:36 +0100559 xferfunc = hwif->atapi_input_bytes;
Borislav Petkov0eea6452008-02-02 19:56:36 +0100560
561 if (pc->buffer)
562 xferfunc(drive, pc->current_position, bcount);
563 else
Borislav Petkov32925e12008-02-02 19:56:36 +0100564 ide_floppy_io_buffers(drive, pc, bcount,
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100565 !!(pc->flags & PC_FLAG_WRITING));
Borislav Petkov0eea6452008-02-02 19:56:36 +0100566
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 /* Update the current position */
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100568 pc->actually_transferred += bcount;
569 pc->current_position += bcount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Borislav Petkov32925e12008-02-02 19:56:36 +0100571 /* And set the interrupt handler again */
572 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return ide_started;
574}
575
576/*
577 * This is the original routine that did the packet transfer.
578 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
579 * for that drive below. The algorithm is chosen based on drive type
580 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100581static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582{
583 ide_startstop_t startstop;
584 idefloppy_floppy_t *floppy = drive->driver_data;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100585 u8 ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
588 printk(KERN_ERR "ide-floppy: Strange, packet command "
589 "initiated yet DRQ isn't asserted\n");
590 return startstop;
591 }
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100592 ireason = drive->hwif->INB(IDE_IREASON_REG);
593 if ((ireason & CD) == 0 || (ireason & IO)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
595 "issuing a packet command\n");
596 return ide_do_reset(drive);
597 }
Borislav Petkov0078df22008-02-02 19:56:33 +0100598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599 /* Set the interrupt routine */
600 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
601 /* Send the actual packet */
602 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
603 return ide_started;
604}
605
606
607/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100608 * What we have here is a classic case of a top half / bottom half interrupt
609 * service routine. In interrupt mode, the device sends an interrupt to signal
610 * that it is ready to receive a packet. However, we need to delay about 2-3
611 * ticks before issuing the packet or we gets in trouble.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 *
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100613 * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
614 * In either case, when the device says it's ready for a packet, we schedule
615 * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100617static int idefloppy_transfer_pc2(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618{
619 idefloppy_floppy_t *floppy = drive->driver_data;
620
621 /* Send the actual packet */
622 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
623 /* Timeout for the packet command */
624 return IDEFLOPPY_WAIT_CMD;
625}
626
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100627static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628{
629 idefloppy_floppy_t *floppy = drive->driver_data;
630 ide_startstop_t startstop;
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100631 u8 ireason;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632
633 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
634 printk(KERN_ERR "ide-floppy: Strange, packet command "
635 "initiated yet DRQ isn't asserted\n");
636 return startstop;
637 }
Bartlomiej Zolnierkiewicz8e7657a2008-01-25 22:17:12 +0100638 ireason = drive->hwif->INB(IDE_IREASON_REG);
639 if ((ireason & CD) == 0 || (ireason & IO)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
641 "while issuing a packet command\n");
642 return ide_do_reset(drive);
643 }
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100644 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 * The following delay solves a problem with ATAPI Zip 100 drives
646 * where the Busy flag was apparently being deasserted before the
647 * unit was ready to receive data. This was happening on a
648 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
649 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
650 * used until after the packet is moved in about 50 msec.
651 */
Borislav Petkov0078df22008-02-02 19:56:33 +0100652
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100653 ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
654 &idefloppy_transfer_pc2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return ide_started;
656}
657
Borislav Petkovd652c132008-02-02 19:56:35 +0100658static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
659 idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660{
Borislav Petkovd652c132008-02-02 19:56:35 +0100661 /* supress error messages resulting from Medium not present */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 if (floppy->sense_key == 0x02 &&
663 floppy->asc == 0x3a &&
664 floppy->ascq == 0x00)
Borislav Petkovd652c132008-02-02 19:56:35 +0100665 return;
666
667 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
668 "asc = %2x, ascq = %2x\n",
669 floppy->drive->name, pc->c[0], floppy->sense_key,
670 floppy->asc, floppy->ascq);
671
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672}
673
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100674static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
675 idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676{
677 idefloppy_floppy_t *floppy = drive->driver_data;
678 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 ide_handler_t *pkt_xfer_routine;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100680 u16 bcount;
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +0100681 u8 dma;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 if (floppy->failed_pc == NULL &&
Borislav Petkov30d67092008-02-02 19:56:33 +0100684 pc->c[0] != GPCMD_REQUEST_SENSE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 floppy->failed_pc = pc;
686 /* Set the current packet command */
687 floppy->pc = pc;
688
Borislav Petkov757ced82008-02-02 19:56:37 +0100689 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100690 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
Borislav Petkov757ced82008-02-02 19:56:37 +0100691 ide_floppy_report_error(floppy, pc);
692 /* Giving up */
693 pc->error = IDEFLOPPY_ERROR_GENERAL;
694
Linus Torvalds1da177e2005-04-16 15:20:36 -0700695 floppy->failed_pc = NULL;
696 pc->callback(drive);
697 return ide_stopped;
698 }
699
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100700 debug_log("Retry number - %d\n", pc->retries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702 pc->retries++;
703 /* We haven't transferred any data yet */
704 pc->actually_transferred = 0;
705 pc->current_position = pc->buffer;
Bartlomiej Zolnierkiewicz790d1232008-01-25 22:17:12 +0100706 bcount = min(pc->request_transfer, 63 * 1024);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100708 if (pc->flags & PC_FLAG_DMA_ERROR) {
709 pc->flags &= ~PC_FLAG_DMA_ERROR;
Bartlomiej Zolnierkiewicz7469aaf2007-02-17 02:40:26 +0100710 ide_dma_off(drive);
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100711 }
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +0100712 dma = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100714 if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
Bartlomiej Zolnierkiewicze5f9f5a2008-01-25 22:17:12 +0100715 dma = !hwif->dma_setup(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
Bartlomiej Zolnierkiewicz2fc57382008-01-25 22:17:13 +0100717 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
718 IDE_TFLAG_OUT_DEVICE, bcount, dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100720 if (dma) {
721 /* Begin DMA, if necessary */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100722 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 hwif->dma_start(drive);
724 }
725
726 /* Can we transfer the packet when we get the interrupt or wait? */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100727 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 /* wait */
729 pkt_xfer_routine = &idefloppy_transfer_pc1;
730 } else {
731 /* immediate */
732 pkt_xfer_routine = &idefloppy_transfer_pc;
733 }
734
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100735 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 /* Issue the packet command */
737 ide_execute_command(drive, WIN_PACKETCMD,
738 pkt_xfer_routine,
739 IDEFLOPPY_WAIT_CMD,
740 NULL);
741 return ide_started;
742 } else {
743 /* Issue the packet command */
744 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
745 return (*pkt_xfer_routine) (drive);
746 }
747}
748
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100749static void idefloppy_rw_callback(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750{
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100751 debug_log("Reached %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
753 idefloppy_do_end_request(drive, 1, 0);
754 return;
755}
756
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100757static void idefloppy_create_prevent_cmd(idefloppy_pc_t *pc, int prevent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758{
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100759 debug_log("creating prevent removal command, prevent = %d\n", prevent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
761 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100762 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 pc->c[4] = prevent;
764}
765
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100766static void idefloppy_create_read_capacity_cmd(idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767{
768 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100769 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 pc->c[7] = 255;
771 pc->c[8] = 255;
772 pc->request_transfer = 255;
773}
774
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100775static void idefloppy_create_format_unit_cmd(idefloppy_pc_t *pc, int b, int l,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 int flags)
777{
778 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100779 pc->c[0] = GPCMD_FORMAT_UNIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 pc->c[1] = 0x17;
781
782 memset(pc->buffer, 0, 12);
783 pc->buffer[1] = 0xA2;
784 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
785
786 if (flags & 1) /* Verify bit on... */
787 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
788 pc->buffer[3] = 8;
789
Borislav Petkov8f622432008-02-02 19:56:33 +0100790 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
791 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100792 pc->buffer_size = 12;
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100793 pc->flags |= PC_FLAG_WRITING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794}
795
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100796/* A mode sense command is used to "sense" floppy parameters. */
797static void idefloppy_create_mode_sense_cmd(idefloppy_pc_t *pc, u8 page_code,
798 u8 type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799{
Borislav Petkov24a5d702008-02-02 19:56:34 +0100800 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100801
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100803 pc->c[0] = GPCMD_MODE_SENSE_10;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 pc->c[1] = 0;
805 pc->c[2] = page_code + (type << 6);
806
807 switch (page_code) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100808 case IDEFLOPPY_CAPABILITIES_PAGE:
809 length += 12;
810 break;
811 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
812 length += 32;
813 break;
814 default:
815 printk(KERN_ERR "ide-floppy: unsupported page code "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 "in create_mode_sense_cmd\n");
817 }
Borislav Petkov8f622432008-02-02 19:56:33 +0100818 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 pc->request_transfer = length;
820}
821
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100822static void idefloppy_create_start_stop_cmd(idefloppy_pc_t *pc, int start)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823{
824 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100825 pc->c[0] = GPCMD_START_STOP_UNIT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 pc->c[4] = start;
827}
828
829static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
830{
831 idefloppy_init_pc(pc);
Borislav Petkov30d67092008-02-02 19:56:33 +0100832 pc->c[0] = GPCMD_TEST_UNIT_READY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833}
834
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100835static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
836 idefloppy_pc_t *pc, struct request *rq,
837 unsigned long sector)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838{
839 int block = sector / floppy->bs_factor;
840 int blocks = rq->nr_sectors / floppy->bs_factor;
841 int cmd = rq_data_dir(rq);
842
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100843 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 block, blocks);
845
846 idefloppy_init_pc(pc);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100847 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
848 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
Borislav Petkov8f622432008-02-02 19:56:33 +0100849 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
Borislav Petkovae7e8dd2008-02-02 19:56:36 +0100850
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 pc->callback = &idefloppy_rw_callback;
852 pc->rq = rq;
853 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200854 if (rq->cmd_flags & REQ_RW)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100855 pc->flags |= PC_FLAG_WRITING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 pc->buffer = NULL;
857 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100858 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859}
860
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100861static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
862 idefloppy_pc_t *pc, struct request *rq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 idefloppy_init_pc(pc);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200865 pc->callback = &idefloppy_rw_callback;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 memcpy(pc->c, rq->cmd, sizeof(pc->c));
Jens Axboe3d6392c2007-07-09 12:38:05 +0200867 pc->rq = rq;
868 pc->b_count = rq->data_len;
869 if (rq->data_len && rq_data_dir(rq) == WRITE)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100870 pc->flags |= PC_FLAG_WRITING;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200871 pc->buffer = rq->data;
872 if (rq->bio)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +0100873 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
Jens Axboe3d6392c2007-07-09 12:38:05 +0200874 /*
875 * possibly problematic, doesn't look like ide-floppy correctly
876 * handled scattered requests if dma fails...
877 */
878 pc->request_transfer = pc->buffer_size = rq->data_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879}
880
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100881static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
882 struct request *rq, sector_t block_s)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883{
884 idefloppy_floppy_t *floppy = drive->driver_data;
885 idefloppy_pc_t *pc;
886 unsigned long block = (unsigned long)block_s;
887
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100888 debug_log("dev: %s, cmd_type: %x, errors: %d\n",
Randy Dunlap18cddac2006-06-25 05:48:56 -0700889 rq->rq_disk ? rq->rq_disk->disk_name : "?",
Borislav Petkovbcc77d92008-02-02 19:56:34 +0100890 rq->cmd_type, rq->errors);
891 debug_log("sector: %ld, nr_sectors: %ld, "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 "current_nr_sectors: %d\n", (long)rq->sector,
893 rq->nr_sectors, rq->current_nr_sectors);
894
895 if (rq->errors >= ERROR_MAX) {
Borislav Petkovd652c132008-02-02 19:56:35 +0100896 if (floppy->failed_pc)
897 ide_floppy_report_error(floppy, floppy->failed_pc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 else
899 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
900 drive->name);
901 idefloppy_do_end_request(drive, 0, 0);
902 return ide_stopped;
903 }
Jens Axboe4aff5e22006-08-10 08:44:47 +0200904 if (blk_fs_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 if (((long)rq->sector % floppy->bs_factor) ||
906 (rq->nr_sectors % floppy->bs_factor)) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100907 printk(KERN_ERR "%s: unsupported r/w request size\n",
908 drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 idefloppy_do_end_request(drive, 0, 0);
910 return ide_stopped;
911 }
912 pc = idefloppy_next_pc_storage(drive);
913 idefloppy_create_rw_cmd(floppy, pc, rq, block);
Jens Axboe4aff5e22006-08-10 08:44:47 +0200914 } else if (blk_special_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 pc = (idefloppy_pc_t *) rq->buffer;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200916 } else if (blk_pc_request(rq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 pc = idefloppy_next_pc_storage(drive);
Jens Axboe3d6392c2007-07-09 12:38:05 +0200918 idefloppy_blockpc_cmd(floppy, pc, rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919 } else {
920 blk_dump_rq_flags(rq,
921 "ide-floppy: unsupported command in queue");
922 idefloppy_do_end_request(drive, 0, 0);
923 return ide_stopped;
924 }
925
926 pc->rq = rq;
927 return idefloppy_issue_pc(drive, pc);
928}
929
930/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100931 * Add a special packet command request to the tail of the request queue,
932 * and wait for it to be serviced.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 */
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100934static int idefloppy_queue_pc_tail(ide_drive_t *drive, idefloppy_pc_t *pc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935{
936 struct ide_floppy_obj *floppy = drive->driver_data;
937 struct request rq;
938
Borislav Petkov0571c7a2008-02-02 19:56:38 +0100939 ide_init_drive_cmd(&rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 rq.buffer = (char *) pc;
Jens Axboe4aff5e22006-08-10 08:44:47 +0200941 rq.cmd_type = REQ_TYPE_SPECIAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 rq.rq_disk = floppy->disk;
943
944 return ide_do_drive_cmd(drive, &rq, ide_wait);
945}
946
947/*
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100948 * Look at the flexible disk page parameters. We ignore the CHS capacity
949 * parameters and use the LBA parameters instead.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 */
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100951static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952{
953 idefloppy_floppy_t *floppy = drive->driver_data;
954 idefloppy_pc_t pc;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100955 u8 *page;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 int capacity, lba_capacity;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100957 u16 transfer_rate, sector_size, cyls, rpm;
958 u8 heads, sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100960 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
961 MODE_SENSE_CURRENT);
962
963 if (idefloppy_queue_pc_tail(drive, &pc)) {
964 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
965 " parameters\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 return 1;
967 }
Borislav Petkov24a5d702008-02-02 19:56:34 +0100968 floppy->wp = !!(pc.buffer[3] & 0x80);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 set_disk_ro(floppy->disk, floppy->wp);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100970 page = &pc.buffer[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100972 transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
973 sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
974 cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
975 rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
976 heads = pc.buffer[8 + 4];
977 sectors = pc.buffer[8 + 5];
978
979 capacity = cyls * heads * sectors * sector_size;
980
981 if (memcmp(page, &floppy->flexible_disk_page, 32))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
983 "%d sector size, %d rpm\n",
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100984 drive->name, capacity / 1024, cyls, heads,
985 sectors, transfer_rate / 8, sector_size, rpm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100987 memcpy(&floppy->flexible_disk_page, page, 32);
988 drive->bios_cyl = cyls;
989 drive->bios_head = heads;
990 drive->bios_sect = sectors;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 lba_capacity = floppy->blocks * floppy->block_size;
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100992
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 if (capacity < lba_capacity) {
994 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
995 "bytes, but the drive only handles %d\n",
996 drive->name, lba_capacity, capacity);
Borislav Petkov8e81bbb2008-02-02 19:56:35 +0100997 floppy->blocks = floppy->block_size ?
998 capacity / floppy->block_size : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 }
1000 return 0;
1001}
1002
Borislav Petkov948391d2008-02-02 19:56:34 +01001003static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004{
1005 idefloppy_floppy_t *floppy = drive->driver_data;
1006 idefloppy_pc_t pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
1008 floppy->srfp = 0;
1009 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1010 MODE_SENSE_CURRENT);
1011
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001012 pc.flags |= PC_FLAG_SUPPRESS_ERROR;
Borislav Petkov948391d2008-02-02 19:56:34 +01001013 if (idefloppy_queue_pc_tail(drive, &pc))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015
Borislav Petkov948391d2008-02-02 19:56:34 +01001016 floppy->srfp = pc.buffer[8 + 2] & 0x40;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 return (0);
1018}
1019
1020/*
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001021 * Determine if a media is present in the floppy drive, and if so, its LBA
1022 * capacity.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 */
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001024static int ide_floppy_get_capacity(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025{
1026 idefloppy_floppy_t *floppy = drive->driver_data;
1027 idefloppy_pc_t pc;
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001028 u8 *cap_desc;
1029 u8 header_len, desc_cnt;
1030 int i, rc = 1, blocks, length;
1031
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 drive->bios_cyl = 0;
1033 drive->bios_head = drive->bios_sect = 0;
Alan Coxfdb77da2007-02-17 02:40:20 +01001034 floppy->blocks = 0;
1035 floppy->bs_factor = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 set_capacity(floppy->disk, 0);
1037
1038 idefloppy_create_read_capacity_cmd(&pc);
1039 if (idefloppy_queue_pc_tail(drive, &pc)) {
1040 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1041 return 1;
1042 }
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001043 header_len = pc.buffer[3];
1044 cap_desc = &pc.buffer[4];
1045 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001047 for (i = 0; i < desc_cnt; i++) {
1048 unsigned int desc_start = 4 + i*8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001050 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1051 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1052
1053 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1054 i, blocks * length / 1024, blocks, length);
1055
1056 if (i)
1057 continue;
1058 /*
1059 * the code below is valid only for the 1st descriptor, ie i=0
1060 */
1061
1062 switch (pc.buffer[desc_start + 4] & 0x03) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1064 case CAPACITY_UNFORMATTED:
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001065 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001066 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 * If it is not a clik drive, break out
1068 * (maintains previous driver behaviour)
1069 */
1070 break;
1071 case CAPACITY_CURRENT:
1072 /* Normal Zip/LS-120 disks */
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001073 if (memcmp(cap_desc, &floppy->cap_desc, 8))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1075 "sector size\n", drive->name,
1076 blocks * length / 1024, blocks, length);
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001077 memcpy(&floppy->cap_desc, cap_desc, 8);
1078
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 if (!length || length % 512) {
1080 printk(KERN_NOTICE "%s: %d bytes block size "
1081 "not supported\n", drive->name, length);
1082 } else {
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001083 floppy->blocks = blocks;
1084 floppy->block_size = length;
1085 floppy->bs_factor = length / 512;
1086 if (floppy->bs_factor != 1)
1087 printk(KERN_NOTICE "%s: warning: non "
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 "512 bytes block size not "
1089 "fully supported\n",
1090 drive->name);
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001091 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 }
1093 break;
1094 case CAPACITY_NO_CARTRIDGE:
1095 /*
1096 * This is a KERN_ERR so it appears on screen
1097 * for the user to see
1098 */
1099 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1100 break;
1101 case CAPACITY_INVALID:
1102 printk(KERN_ERR "%s: Invalid capacity for disk "
1103 "in drive\n", drive->name);
1104 break;
1105 }
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001106 debug_log("Descriptor 0 Code: %d\n",
1107 pc.buffer[desc_start + 4] & 0x03);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 }
1109
1110 /* Clik! disk does not support get_flexible_disk_page */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001111 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
Borislav Petkov8e81bbb2008-02-02 19:56:35 +01001112 (void) ide_floppy_get_flexible_disk_page(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1115 return rc;
1116}
1117
1118/*
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001119 * Obtain the list of formattable capacities.
1120 * Very similar to ide_floppy_get_capacity, except that we push the capacity
1121 * descriptors to userland, instead of our own structures.
1122 *
1123 * Userland gives us the following structure:
1124 *
1125 * struct idefloppy_format_capacities {
1126 * int nformats;
1127 * struct {
1128 * int nblocks;
1129 * int blocksize;
1130 * } formats[];
1131 * };
1132 *
1133 * userland initializes nformats to the number of allocated formats[] records.
1134 * On exit we set nformats to the number of records we've actually initialized.
1135 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001137static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138{
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001139 idefloppy_pc_t pc;
1140 u8 header_len, desc_cnt;
1141 int i, blocks, length, u_array_size, u_index;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 int __user *argp;
1143
1144 if (get_user(u_array_size, arg))
1145 return (-EFAULT);
1146
1147 if (u_array_size <= 0)
1148 return (-EINVAL);
1149
1150 idefloppy_create_read_capacity_cmd(&pc);
1151 if (idefloppy_queue_pc_tail(drive, &pc)) {
1152 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001153 return (-EIO);
1154 }
1155 header_len = pc.buffer[3];
1156 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157
1158 u_index = 0;
1159 argp = arg + 1;
1160
1161 /*
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001162 * We always skip the first capacity descriptor. That's the current
1163 * capacity. We are interested in the remaining descriptors, the
1164 * formattable capacities.
1165 */
1166 for (i = 1; i < desc_cnt; i++) {
1167 unsigned int desc_start = 4 + i*8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
Linus Torvalds1da177e2005-04-16 15:20:36 -07001169 if (u_index >= u_array_size)
1170 break; /* User-supplied buffer too small */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001172 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1173 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
1175 if (put_user(blocks, argp))
1176 return(-EFAULT);
1177 ++argp;
1178
1179 if (put_user(length, argp))
1180 return (-EFAULT);
1181 ++argp;
1182
1183 ++u_index;
1184 }
1185
1186 if (put_user(u_index, arg))
1187 return (-EFAULT);
1188 return (0);
1189}
1190
1191/*
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001192 * Get ATAPI_FORMAT_UNIT progress indication.
1193 *
1194 * Userland gives a pointer to an int. The int is set to a progress
1195 * indicator 0-65536, with 65536=100%.
1196 *
1197 * If the drive does not support format progress indication, we just check
1198 * the dsc bit, and return either 0 or 65536.
1199 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001200
1201static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1202{
1203 idefloppy_floppy_t *floppy = drive->driver_data;
1204 idefloppy_pc_t pc;
1205 int progress_indication = 0x10000;
1206
1207 if (floppy->srfp) {
1208 idefloppy_create_request_sense_cmd(&pc);
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001209 if (idefloppy_queue_pc_tail(drive, &pc))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 return (-EIO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211
1212 if (floppy->sense_key == 2 &&
1213 floppy->asc == 4 &&
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001214 floppy->ascq == 4)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 progress_indication = floppy->progress_indication;
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001216
1217 /* Else assume format_unit has finished, and we're at 0x10000 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 unsigned long flags;
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +01001220 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221
1222 local_irq_save(flags);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +01001223 stat = ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 local_irq_restore(flags);
1225
Bartlomiej Zolnierkiewicz22c525b2008-01-25 22:17:11 +01001226 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227 }
1228 if (put_user(progress_indication, arg))
1229 return (-EFAULT);
1230
1231 return (0);
1232}
1233
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001234static sector_t idefloppy_capacity(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235{
1236 idefloppy_floppy_t *floppy = drive->driver_data;
1237 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1238
1239 return capacity;
1240}
1241
1242/*
Borislav Petkovf373bd82008-02-02 19:56:36 +01001243 * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1244 * results.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 */
Borislav Petkovf373bd82008-02-02 19:56:36 +01001246static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001247{
Borislav Petkov3ad67762008-04-18 00:46:25 +02001248 u8 gcw[2];
1249 u8 device_type, protocol, removable, drq_type, packet_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250
1251 *((u16 *) &gcw) = id->config;
1252
Borislav Petkov3ad67762008-04-18 00:46:25 +02001253 device_type = gcw[1] & 0x1F;
1254 removable = (gcw[0] & 0x80) >> 7;
1255 protocol = (gcw[1] & 0xC0) >> 6;
1256 drq_type = (gcw[0] & 0x60) >> 5;
1257 packet_size = gcw[0] & 0x03;
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259#ifdef CONFIG_PPC
1260 /* kludge for Apple PowerBook internal zip */
Borislav Petkov3ad67762008-04-18 00:46:25 +02001261 if (device_type == 5 &&
1262 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1263 device_type = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264#endif
1265
Borislav Petkov3ad67762008-04-18 00:46:25 +02001266 if (protocol != 2)
Borislav Petkovf373bd82008-02-02 19:56:36 +01001267 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
Borislav Petkov3ad67762008-04-18 00:46:25 +02001268 protocol);
1269 else if (device_type != 0)
Borislav Petkovf373bd82008-02-02 19:56:36 +01001270 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
Borislav Petkov3ad67762008-04-18 00:46:25 +02001271 "to floppy\n", device_type);
1272 else if (!removable)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
Borislav Petkov3ad67762008-04-18 00:46:25 +02001274 else if (drq_type == 3)
Borislav Petkovf373bd82008-02-02 19:56:36 +01001275 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
Borislav Petkov3ad67762008-04-18 00:46:25 +02001276 "supported\n", drq_type);
1277 else if (packet_size != 0)
Borislav Petkovf373bd82008-02-02 19:56:36 +01001278 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
Borislav Petkov3ad67762008-04-18 00:46:25 +02001279 "bytes\n", packet_size);
1280 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 return 1;
1282 return 0;
1283}
1284
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001285#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001286static void idefloppy_add_settings(ide_drive_t *drive)
1287{
1288 idefloppy_floppy_t *floppy = drive->driver_data;
1289
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001290 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1291 &drive->bios_cyl, NULL);
1292 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1293 &drive->bios_head, NULL);
1294 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
1295 &drive->bios_sect, NULL);
1296 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1297 &floppy->ticks, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298}
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001299#else
1300static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1301#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001303static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304{
Borislav Petkov3ad67762008-04-18 00:46:25 +02001305 u8 gcw[2];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
1307 *((u16 *) &gcw) = drive->id->config;
1308 floppy->pc = floppy->pc_stack;
Borislav Petkov3ad67762008-04-18 00:46:25 +02001309
1310 if (((gcw[0] & 0x60) >> 5) == 1)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001311 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001312 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001313 * We used to check revisions here. At this point however I'm giving up.
1314 * Just assume they are all broken, its easier.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315 *
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001316 * The actual reason for the workarounds was likely a driver bug after
1317 * all rather than a firmware bug, and the workaround below used to hide
1318 * it. It should be fixed as of version 1.9, but to be on the safe side
1319 * we'll leave the limitation below for the 2.2.x tree.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001322 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 /* This value will be visible in the /proc/ide/hdx/settings */
1324 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1325 blk_queue_max_sectors(drive->queue, 64);
1326 }
1327
1328 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001329 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1330 * nasty clicking noises without it, so please don't remove this.
1331 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1333 blk_queue_max_sectors(drive->queue, 64);
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001334 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335 }
1336
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001337 (void) ide_floppy_get_capacity(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 idefloppy_add_settings(drive);
1339}
1340
Russell King4031bbe2006-01-06 11:41:00 +00001341static void ide_floppy_remove(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342{
1343 idefloppy_floppy_t *floppy = drive->driver_data;
1344 struct gendisk *g = floppy->disk;
1345
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001346 ide_proc_unregister_driver(drive, floppy->driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347
1348 del_gendisk(g);
1349
1350 ide_floppy_put(floppy);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351}
1352
Borislav Petkov9a24b632008-02-02 19:56:33 +01001353static void idefloppy_cleanup_obj(struct kref *kref)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354{
1355 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1356 ide_drive_t *drive = floppy->drive;
1357 struct gendisk *g = floppy->disk;
1358
1359 drive->driver_data = NULL;
1360 g->private_data = NULL;
1361 put_disk(g);
1362 kfree(floppy);
1363}
1364
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +02001365#ifdef CONFIG_IDE_PROC_FS
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001366static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1367 int count, int *eof, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368{
1369 ide_drive_t*drive = (ide_drive_t *)data;
1370 int len;
1371
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001372 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1373 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374}
1375
1376static ide_proc_entry_t idefloppy_proc[] = {
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001377 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1378 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001379 { NULL, 0, NULL, NULL }
1380};
Bartlomiej Zolnierkiewiczecfd80e2007-05-10 00:01:09 +02001381#endif /* CONFIG_IDE_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382
Russell King4031bbe2006-01-06 11:41:00 +00001383static int ide_floppy_probe(ide_drive_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385static ide_driver_t idefloppy_driver = {
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001386 .gen_driver = {
Laurent Riffard4ef3b8f2005-11-18 22:15:40 +01001387 .owner = THIS_MODULE,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001388 .name = "ide-floppy",
1389 .bus = &ide_bus_type,
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001390 },
Russell King4031bbe2006-01-06 11:41:00 +00001391 .probe = ide_floppy_probe,
1392 .remove = ide_floppy_remove,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393 .version = IDEFLOPPY_VERSION,
1394 .media = ide_floppy,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 .supports_dsc_overlap = 0,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396 .do_request = idefloppy_do_request,
1397 .end_request = idefloppy_do_end_request,
1398 .error = __ide_error,
1399 .abort = __ide_abort,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001400#ifdef CONFIG_IDE_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 .proc = idefloppy_proc,
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001402#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001403};
1404
1405static int idefloppy_open(struct inode *inode, struct file *filp)
1406{
1407 struct gendisk *disk = inode->i_bdev->bd_disk;
1408 struct ide_floppy_obj *floppy;
1409 ide_drive_t *drive;
1410 idefloppy_pc_t pc;
1411 int ret = 0;
1412
Borislav Petkovbcc77d92008-02-02 19:56:34 +01001413 debug_log("Reached %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001415 floppy = ide_floppy_get(disk);
1416 if (!floppy)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 return -ENXIO;
1418
1419 drive = floppy->drive;
1420
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001421 floppy->openers++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001422
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001423 if (floppy->openers == 1) {
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001424 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 /* Just in case */
1426
1427 idefloppy_create_test_unit_ready_cmd(&pc);
1428 if (idefloppy_queue_pc_tail(drive, &pc)) {
1429 idefloppy_create_start_stop_cmd(&pc, 1);
1430 (void) idefloppy_queue_pc_tail(drive, &pc);
1431 }
1432
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001433 if (ide_floppy_get_capacity(drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 && (filp->f_flags & O_NDELAY) == 0
1435 /*
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001436 * Allow O_NDELAY to open a drive without a disk, or with an
1437 * unreadable disk, so that we can get the format capacity
1438 * of the drive or begin the format - Sam
1439 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440 ) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441 ret = -EIO;
1442 goto out_put_floppy;
1443 }
1444
1445 if (floppy->wp && (filp->f_mode & 2)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 ret = -EROFS;
1447 goto out_put_floppy;
1448 }
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001449 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450 /* IOMEGA Clik! drives do not support lock/unlock commands */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001451 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 idefloppy_create_prevent_cmd(&pc, 1);
1453 (void) idefloppy_queue_pc_tail(drive, &pc);
1454 }
1455 check_disk_change(inode->i_bdev);
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001456 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 ret = -EBUSY;
1458 goto out_put_floppy;
1459 }
1460 return 0;
1461
1462out_put_floppy:
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001463 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 ide_floppy_put(floppy);
1465 return ret;
1466}
1467
1468static int idefloppy_release(struct inode *inode, struct file *filp)
1469{
1470 struct gendisk *disk = inode->i_bdev->bd_disk;
1471 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1472 ide_drive_t *drive = floppy->drive;
1473 idefloppy_pc_t pc;
Borislav Petkovbcc77d92008-02-02 19:56:34 +01001474
1475 debug_log("Reached %s\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001477 if (floppy->openers == 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001478 /* IOMEGA Clik! drives do not support lock/unlock commands */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001479 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 idefloppy_create_prevent_cmd(&pc, 0);
1481 (void) idefloppy_queue_pc_tail(drive, &pc);
1482 }
1483
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001484 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001485 }
Bartlomiej Zolnierkiewiczc94964a2007-02-17 02:40:24 +01001486
1487 floppy->openers--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488
1489 ide_floppy_put(floppy);
1490
1491 return 0;
1492}
1493
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08001494static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1495{
1496 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1497 ide_drive_t *drive = floppy->drive;
1498
1499 geo->heads = drive->bios_head;
1500 geo->sectors = drive->bios_sect;
1501 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1502 return 0;
1503}
1504
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001505static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1506 unsigned long arg, unsigned int cmd)
1507{
1508 if (floppy->openers > 1)
1509 return -EBUSY;
1510
1511 /* The IOMEGA Clik! Drive doesn't support this command -
1512 * no room for an eject mechanism */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001513 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001514 int prevent = arg ? 1 : 0;
1515
1516 if (cmd == CDROMEJECT)
1517 prevent = 0;
1518
1519 idefloppy_create_prevent_cmd(pc, prevent);
1520 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1521 }
1522
1523 if (cmd == CDROMEJECT) {
1524 idefloppy_create_start_stop_cmd(pc, 2);
1525 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1526 }
1527
1528 return 0;
1529}
1530
1531static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1532 int __user *arg)
1533{
1534 int blocks, length, flags, err = 0;
1535 idefloppy_pc_t pc;
1536
1537 if (floppy->openers > 1) {
1538 /* Don't format if someone is using the disk */
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001539 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001540 return -EBUSY;
1541 }
1542
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001543 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001544
1545 /*
1546 * Send ATAPI_FORMAT_UNIT to the drive.
1547 *
1548 * Userland gives us the following structure:
1549 *
1550 * struct idefloppy_format_command {
1551 * int nblocks;
1552 * int blocksize;
1553 * int flags;
1554 * } ;
1555 *
1556 * flags is a bitmask, currently, the only defined flag is:
1557 *
1558 * 0x01 - verify media after format.
1559 */
1560 if (get_user(blocks, arg) ||
1561 get_user(length, arg+1) ||
1562 get_user(flags, arg+2)) {
1563 err = -EFAULT;
1564 goto out;
1565 }
1566
1567 (void) idefloppy_get_sfrp_bit(floppy->drive);
1568 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1569
1570 if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1571 err = -EIO;
1572
1573out:
1574 if (err)
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001575 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001576 return err;
1577}
1578
1579
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580static int idefloppy_ioctl(struct inode *inode, struct file *file,
1581 unsigned int cmd, unsigned long arg)
1582{
1583 struct block_device *bdev = inode->i_bdev;
1584 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1585 ide_drive_t *drive = floppy->drive;
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001586 idefloppy_pc_t pc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 void __user *argp = (void __user *)arg;
Ondrej Zary07203f62005-11-10 00:25:15 +01001588 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001589
1590 switch (cmd) {
1591 case CDROMEJECT:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592 /* fall through */
1593 case CDROM_LOCKDOOR:
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001594 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1596 return 0;
1597 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
Borislav Petkov194ec0c2008-02-02 19:56:35 +01001598 return ide_floppy_get_format_capacities(drive, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 case IDEFLOPPY_IOCTL_FORMAT_START:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 if (!(file->f_mode & 2))
1601 return -EPERM;
1602
Borislav Petkov20bf7bd2008-02-02 19:56:35 +01001603 return ide_floppy_format_unit(floppy, (int __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1605 return idefloppy_get_format_progress(drive, argp);
1606 }
Bartlomiej Zolnierkiewicz89636af2007-07-20 01:11:59 +02001607
1608 /*
1609 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1610 * and CDROM_SEND_PACKET (legacy) ioctls
1611 */
1612 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1613 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1614 bdev->bd_disk, cmd, argp);
1615 else
1616 err = -ENOTTY;
1617
1618 if (err == -ENOTTY)
1619 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1620
1621 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622}
1623
1624static int idefloppy_media_changed(struct gendisk *disk)
1625{
1626 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1627 ide_drive_t *drive = floppy->drive;
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001628 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629
1630 /* do not scan partitions twice if this is a removable device */
1631 if (drive->attach) {
1632 drive->attach = 0;
1633 return 0;
1634 }
Borislav Petkov6e5fa7b2008-02-02 19:56:37 +01001635 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1636 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1637 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001638}
1639
1640static int idefloppy_revalidate_disk(struct gendisk *disk)
1641{
1642 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1643 set_capacity(disk, idefloppy_capacity(floppy->drive));
1644 return 0;
1645}
1646
1647static struct block_device_operations idefloppy_ops = {
1648 .owner = THIS_MODULE,
1649 .open = idefloppy_open,
1650 .release = idefloppy_release,
1651 .ioctl = idefloppy_ioctl,
Christoph Hellwiga885c8c2006-01-08 01:02:50 -08001652 .getgeo = idefloppy_getgeo,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 .media_changed = idefloppy_media_changed,
1654 .revalidate_disk= idefloppy_revalidate_disk
1655};
1656
Russell King4031bbe2006-01-06 11:41:00 +00001657static int ide_floppy_probe(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658{
1659 idefloppy_floppy_t *floppy;
1660 struct gendisk *g;
1661
1662 if (!strstr("ide-floppy", drive->driver_req))
1663 goto failed;
1664 if (!drive->present)
1665 goto failed;
1666 if (drive->media != ide_floppy)
1667 goto failed;
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001668 if (!idefloppy_identify_device(drive, drive->id)) {
1669 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1670 " of ide-floppy\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 goto failed;
1672 }
1673 if (drive->scsi) {
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001674 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
1675 " emulation.\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001676 goto failed;
1677 }
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001678 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1679 if (!floppy) {
1680 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1681 " structure\n", drive->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 goto failed;
1683 }
1684
1685 g = alloc_disk(1 << PARTN_BITS);
1686 if (!g)
1687 goto out_free_floppy;
1688
1689 ide_init_disk(g, drive);
1690
Bartlomiej Zolnierkiewicz7662d042007-05-10 00:01:10 +02001691 ide_proc_register_driver(drive, &idefloppy_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 kref_init(&floppy->kref);
1694
1695 floppy->drive = drive;
1696 floppy->driver = &idefloppy_driver;
1697 floppy->disk = g;
1698
1699 g->private_data = &floppy->driver;
1700
1701 drive->driver_data = floppy;
1702
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001703 idefloppy_setup(drive, floppy);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001704
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 g->minors = 1 << PARTN_BITS;
1706 g->driverfs_dev = &drive->gendev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1708 g->fops = &idefloppy_ops;
1709 drive->attach = 1;
1710 add_disk(g);
1711 return 0;
1712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713out_free_floppy:
1714 kfree(floppy);
1715failed:
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001716 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717}
1718
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001719static void __exit idefloppy_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001720{
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001721 driver_unregister(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722}
1723
Bartlomiej Zolnierkiewicz17514e82005-11-19 22:24:35 +01001724static int __init idefloppy_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001725{
1726 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001727 return driver_register(&idefloppy_driver.gen_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728}
1729
Kay Sievers263756e2005-12-12 18:03:44 +01001730MODULE_ALIAS("ide:*m-floppy*");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001731module_init(idefloppy_init);
1732module_exit(idefloppy_exit);
1733MODULE_LICENSE("GPL");
Borislav Petkov0571c7a2008-02-02 19:56:38 +01001734MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1735