blob: a40ee1e37486bd9b05062074507fd2a64d472677 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * drivers/sbus/char/jsflash.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds (drivers/char/mem.c)
5 * Copyright (C) 1997 Eddie C. Dost (drivers/sbus/char/flash.c)
6 * Copyright (C) 1997-2000 Pavel Machek <pavel@ucw.cz> (drivers/block/nbd.c)
7 * Copyright (C) 1999-2000 Pete Zaitcev
8 *
9 * This driver is used to program OS into a Flash SIMM on
10 * Krups and Espresso platforms.
11 *
12 * TODO: do not allow erase/programming if file systems are mounted.
13 * TODO: Erase/program both banks of a 8MB SIMM.
14 *
15 * It is anticipated that programming an OS Flash will be a routine
Lucas De Marchi25985ed2011-03-30 22:57:33 -030016 * procedure. In the same time it is exceedingly dangerous because
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * a user can program its OBP flash with OS image and effectively
18 * kill the machine.
19 *
20 * This driver uses an interface different from Eddie's flash.c
21 * as a silly safeguard.
22 *
23 * XXX The flash.c manipulates page caching characteristics in a certain
24 * dubious way; also it assumes that remap_pfn_range() can remap
25 * PCI bus locations, which may be false. ioremap() must be used
26 * instead. We should discuss this.
27 */
28
29#include <linux/module.h>
Arnd Bergmann613655f2010-06-02 14:28:52 +020030#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/types.h>
32#include <linux/errno.h>
33#include <linux/miscdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/fcntl.h>
35#include <linux/poll.h>
36#include <linux/init.h>
37#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/genhd.h>
39#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <asm/uaccess.h>
41#include <asm/pgtable.h>
42#include <asm/io.h>
43#include <asm/pcic.h>
44#include <asm/oplib.h>
45
46#include <asm/jsflash.h> /* ioctl arguments. <linux/> ?? */
47#define JSFIDSZ (sizeof(struct jsflash_ident_arg))
48#define JSFPRGSZ (sizeof(struct jsflash_program_arg))
49
50/*
51 * Our device numbers have no business in system headers.
52 * The only thing a user knows is the device name /dev/jsflash.
53 *
54 * Block devices are laid out like this:
55 * minor+0 - Bootstrap, for 8MB SIMM 0x20400000[0x800000]
56 * minor+1 - Filesystem to mount, normally 0x20400400[0x7ffc00]
57 * minor+2 - Whole flash area for any case... 0x20000000[0x01000000]
58 * Total 3 minors per flash device.
59 *
60 * It is easier to have static size vectors, so we define
61 * a total minor range JSF_MAX, which must cover all minors.
62 */
63/* character device */
64#define JSF_MINOR 178 /* 178 is registered with hpa */
65/* block device */
66#define JSF_MAX 3 /* 3 minors wasted total so far. */
67#define JSF_NPART 3 /* 3 minors per flash device */
68#define JSF_PART_BITS 2 /* 2 bits of minors to cover JSF_NPART */
69#define JSF_PART_MASK 0x3 /* 2 bits mask */
70
Arnd Bergmann613655f2010-06-02 14:28:52 +020071static DEFINE_MUTEX(jsf_mutex);
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073/*
74 * Access functions.
75 * We could ioremap(), but it's easier this way.
76 */
77static unsigned int jsf_inl(unsigned long addr)
78{
79 unsigned long retval;
80
81 __asm__ __volatile__("lda [%1] %2, %0\n\t" :
82 "=r" (retval) :
83 "r" (addr), "i" (ASI_M_BYPASS));
84 return retval;
85}
86
87static void jsf_outl(unsigned long addr, __u32 data)
88{
89
90 __asm__ __volatile__("sta %0, [%1] %2\n\t" : :
91 "r" (data), "r" (addr), "i" (ASI_M_BYPASS) :
92 "memory");
93}
94
95/*
96 * soft carrier
97 */
98
99struct jsfd_part {
100 unsigned long dbase;
101 unsigned long dsize;
102};
103
104struct jsflash {
105 unsigned long base;
106 unsigned long size;
107 unsigned long busy; /* In use? */
108 struct jsflash_ident_arg id;
109 /* int mbase; */ /* Minor base, typically zero */
110 struct jsfd_part dv[JSF_NPART];
111};
112
113/*
114 * We do not map normal memory or obio as a safety precaution.
115 * But offsets are real, for ease of userland programming.
116 */
117#define JSF_BASE_TOP 0x30000000
118#define JSF_BASE_ALL 0x20000000
119
120#define JSF_BASE_JK 0x20400000
121
122/*
123 */
124static struct gendisk *jsfd_disk[JSF_MAX];
125
126/*
127 * Let's pretend we may have several of these...
128 */
129static struct jsflash jsf0;
130
131/*
132 * Wait for AMD to finish its embedded algorithm.
133 * We use the Toggle bit DQ6 (0x40) because it does not
134 * depend on the data value as /DATA bit DQ7 does.
135 *
136 * XXX Do we need any timeout here? So far it never hanged, beware broken hw.
137 */
138static void jsf_wait(unsigned long p) {
139 unsigned int x1, x2;
140
141 for (;;) {
142 x1 = jsf_inl(p);
143 x2 = jsf_inl(p);
144 if ((x1 & 0x40404040) == (x2 & 0x40404040)) return;
145 }
146}
147
148/*
149 * Programming will only work if Flash is clean,
150 * we leave it to the programmer application.
151 *
152 * AMD must be programmed one byte at a time;
153 * thus, Simple Tech SIMM must be written 4 bytes at a time.
154 *
155 * Write waits for the chip to become ready after the write
156 * was finished. This is done so that application would read
157 * consistent data after the write is done.
158 */
159static void jsf_write4(unsigned long fa, u32 data) {
160
161 jsf_outl(fa, 0xAAAAAAAA); /* Unlock 1 Write 1 */
162 jsf_outl(fa, 0x55555555); /* Unlock 1 Write 2 */
163 jsf_outl(fa, 0xA0A0A0A0); /* Byte Program */
164 jsf_outl(fa, data);
165
166 jsf_wait(fa);
167}
168
169/*
170 */
171static void jsfd_read(char *buf, unsigned long p, size_t togo) {
172 union byte4 {
173 char s[4];
174 unsigned int n;
175 } b;
176
177 while (togo >= 4) {
178 togo -= 4;
179 b.n = jsf_inl(p);
180 memcpy(buf, b.s, 4);
181 p += 4;
182 buf += 4;
183 }
184}
185
Jens Axboe165125e2007-07-24 09:28:11 +0200186static void jsfd_do_request(struct request_queue *q)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187{
188 struct request *req;
189
Tejun Heo9934c8c2009-05-08 11:54:16 +0900190 req = blk_fetch_request(q);
Tejun Heo6b0bf402009-05-08 11:54:12 +0900191 while (req) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 struct jsfd_part *jdp = req->rq_disk->private_data;
Tejun Heo83096eb2009-05-07 22:24:39 +0900193 unsigned long offset = blk_rq_pos(req) << 9;
Tejun Heo1011c1b2009-05-07 22:24:45 +0900194 size_t len = blk_rq_cur_bytes(req);
Tejun Heo6b0bf402009-05-08 11:54:12 +0900195 int err = -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
Tejun Heo6b0bf402009-05-08 11:54:12 +0900197 if ((offset + len) > jdp->dsize)
198 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 if (rq_data_dir(req) != READ) {
201 printk(KERN_ERR "jsfd: write\n");
Tejun Heo6b0bf402009-05-08 11:54:12 +0900202 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 }
204
205 if ((jdp->dbase & 0xff000000) != 0x20000000) {
206 printk(KERN_ERR "jsfd: bad base %x\n", (int)jdp->dbase);
Tejun Heo6b0bf402009-05-08 11:54:12 +0900207 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 }
209
Jens Axboefb1be432014-04-16 14:14:33 -0600210 jsfd_read(bio_data(req->bio), jdp->dbase + offset, len);
Tejun Heo6b0bf402009-05-08 11:54:12 +0900211 err = 0;
212 end:
Tejun Heo9934c8c2009-05-08 11:54:16 +0900213 if (!__blk_end_request_cur(req, err))
214 req = blk_fetch_request(q);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 }
216}
217
218/*
219 * The memory devices use the full 32/64 bits of the offset, and so we cannot
220 * check against negative addresses: they are ok. The return value is weird,
221 * though, in that case (0).
222 *
223 * also note that seeking relative to the "end of file" isn't supported:
224 * it has no meaning, so it returns -EINVAL.
225 */
226static loff_t jsf_lseek(struct file * file, loff_t offset, int orig)
227{
228 loff_t ret;
229
Arnd Bergmann613655f2010-06-02 14:28:52 +0200230 mutex_lock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 switch (orig) {
232 case 0:
233 file->f_pos = offset;
234 ret = file->f_pos;
235 break;
236 case 1:
237 file->f_pos += offset;
238 ret = file->f_pos;
239 break;
240 default:
241 ret = -EINVAL;
242 }
Arnd Bergmann613655f2010-06-02 14:28:52 +0200243 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 return ret;
245}
246
247/*
248 * OS SIMM Cannot be read in other size but a 32bits word.
249 */
Al Virobc05d832005-12-06 05:51:43 -0500250static ssize_t jsf_read(struct file * file, char __user * buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 size_t togo, loff_t *ppos)
252{
253 unsigned long p = *ppos;
Al Virobc05d832005-12-06 05:51:43 -0500254 char __user *tmp = buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 union byte4 {
257 char s[4];
258 unsigned int n;
259 } b;
260
261 if (p < JSF_BASE_ALL || p >= JSF_BASE_TOP) {
262 return 0;
263 }
264
265 if ((p + togo) < p /* wrap */
266 || (p + togo) >= JSF_BASE_TOP) {
267 togo = JSF_BASE_TOP - p;
268 }
269
270 if (p < JSF_BASE_ALL && togo != 0) {
271#if 0 /* __bzero XXX */
272 size_t x = JSF_BASE_ALL - p;
273 if (x > togo) x = togo;
274 clear_user(tmp, x);
275 tmp += x;
276 p += x;
277 togo -= x;
278#else
279 /*
280 * Implementation of clear_user() calls __bzero
281 * without regard to modversions,
282 * so we cannot build a module.
283 */
284 return 0;
285#endif
286 }
287
288 while (togo >= 4) {
289 togo -= 4;
290 b.n = jsf_inl(p);
291 if (copy_to_user(tmp, b.s, 4))
292 return -EFAULT;
293 tmp += 4;
294 p += 4;
295 }
296
297 /*
298 * XXX Small togo may remain if 1 byte is ordered.
299 * It would be nice if we did a word size read and unpacked it.
300 */
301
302 *ppos = p;
303 return tmp-buf;
304}
305
Al Virobc05d832005-12-06 05:51:43 -0500306static ssize_t jsf_write(struct file * file, const char __user * buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 size_t count, loff_t *ppos)
308{
309 return -ENOSPC;
310}
311
312/*
313 */
314static int jsf_ioctl_erase(unsigned long arg)
315{
316 unsigned long p;
317
318 /* p = jsf0.base; hits wrong bank */
319 p = 0x20400000;
320
321 jsf_outl(p, 0xAAAAAAAA); /* Unlock 1 Write 1 */
322 jsf_outl(p, 0x55555555); /* Unlock 1 Write 2 */
323 jsf_outl(p, 0x80808080); /* Erase setup */
324 jsf_outl(p, 0xAAAAAAAA); /* Unlock 2 Write 1 */
325 jsf_outl(p, 0x55555555); /* Unlock 2 Write 2 */
326 jsf_outl(p, 0x10101010); /* Chip erase */
327
328#if 0
329 /*
330 * This code is ok, except that counter based timeout
331 * has no place in this world. Let's just drop timeouts...
332 */
333 {
334 int i;
335 __u32 x;
336 for (i = 0; i < 1000000; i++) {
337 x = jsf_inl(p);
338 if ((x & 0x80808080) == 0x80808080) break;
339 }
340 if ((x & 0x80808080) != 0x80808080) {
341 printk("jsf0: erase timeout with 0x%08x\n", x);
342 } else {
343 printk("jsf0: erase done with 0x%08x\n", x);
344 }
345 }
346#else
347 jsf_wait(p);
348#endif
349
350 return 0;
351}
352
353/*
354 * Program a block of flash.
355 * Very simple because we can do it byte by byte anyway.
356 */
Al Virobc05d832005-12-06 05:51:43 -0500357static int jsf_ioctl_program(void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
359 struct jsflash_program_arg abuf;
Al Virobc05d832005-12-06 05:51:43 -0500360 char __user *uptr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 unsigned long p;
362 unsigned int togo;
363 union {
364 unsigned int n;
365 char s[4];
366 } b;
367
Al Virobc05d832005-12-06 05:51:43 -0500368 if (copy_from_user(&abuf, arg, JSFPRGSZ))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 return -EFAULT;
370 p = abuf.off;
371 togo = abuf.size;
372 if ((togo & 3) || (p & 3)) return -EINVAL;
373
Al Virobc05d832005-12-06 05:51:43 -0500374 uptr = (char __user *) (unsigned long) abuf.data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 while (togo != 0) {
376 togo -= 4;
377 if (copy_from_user(&b.s[0], uptr, 4))
378 return -EFAULT;
379 jsf_write4(p, b.n);
380 p += 4;
381 uptr += 4;
382 }
383
384 return 0;
385}
386
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700387static long jsf_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Arnd Bergmann613655f2010-06-02 14:28:52 +0200389 mutex_lock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 int error = -ENOTTY;
Al Virobc05d832005-12-06 05:51:43 -0500391 void __user *argp = (void __user *)arg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700393 if (!capable(CAP_SYS_ADMIN)) {
Arnd Bergmann613655f2010-06-02 14:28:52 +0200394 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 return -EPERM;
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700396 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 switch (cmd) {
398 case JSFLASH_IDENT:
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700399 if (copy_to_user(argp, &jsf0.id, JSFIDSZ)) {
Arnd Bergmann613655f2010-06-02 14:28:52 +0200400 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return -EFAULT;
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700402 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 break;
404 case JSFLASH_ERASE:
405 error = jsf_ioctl_erase(arg);
406 break;
407 case JSFLASH_PROGRAM:
Al Virobc05d832005-12-06 05:51:43 -0500408 error = jsf_ioctl_program(argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 break;
410 }
411
Arnd Bergmann613655f2010-06-02 14:28:52 +0200412 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 return error;
414}
415
416static int jsf_mmap(struct file * file, struct vm_area_struct * vma)
417{
418 return -ENXIO;
419}
420
421static int jsf_open(struct inode * inode, struct file * filp)
422{
Arnd Bergmann613655f2010-06-02 14:28:52 +0200423 mutex_lock(&jsf_mutex);
Arnd Bergmann28fbbf42008-05-20 19:16:08 +0200424 if (jsf0.base == 0) {
Arnd Bergmann613655f2010-06-02 14:28:52 +0200425 mutex_unlock(&jsf_mutex);
Arnd Bergmann28fbbf42008-05-20 19:16:08 +0200426 return -ENXIO;
427 }
428 if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) {
Arnd Bergmann613655f2010-06-02 14:28:52 +0200429 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 return -EBUSY;
Arnd Bergmann28fbbf42008-05-20 19:16:08 +0200431 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
Arnd Bergmann613655f2010-06-02 14:28:52 +0200433 mutex_unlock(&jsf_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 return 0; /* XXX What security? */
435}
436
437static int jsf_release(struct inode *inode, struct file *file)
438{
439 jsf0.busy = 0;
440 return 0;
441}
442
Arjan van de Ven00977a52007-02-12 00:55:34 -0800443static const struct file_operations jsf_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 .owner = THIS_MODULE,
445 .llseek = jsf_lseek,
446 .read = jsf_read,
447 .write = jsf_write,
Stoyan Gaydarov6c0f8bc2009-04-14 19:46:19 -0700448 .unlocked_ioctl = jsf_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 .mmap = jsf_mmap,
450 .open = jsf_open,
451 .release = jsf_release,
452};
453
454static struct miscdevice jsf_dev = { JSF_MINOR, "jsflash", &jsf_fops };
455
Alexey Dobriyan83d5cde2009-09-21 17:01:13 -0700456static const struct block_device_operations jsfd_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 .owner = THIS_MODULE,
458};
459
460static int jsflash_init(void)
461{
462 int rc;
463 struct jsflash *jsf;
Andres Salomon8d125562010-10-08 14:18:11 -0700464 phandle node;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 char banner[128];
466 struct linux_prom_registers reg0;
467
468 node = prom_getchild(prom_root_node);
469 node = prom_searchsiblings(node, "flash-memory");
Andres Salomon4a3a2552010-11-11 22:42:06 -0800470 if (node != 0 && (s32)node != -1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 if (prom_getproperty(node, "reg",
472 (char *)&reg0, sizeof(reg0)) == -1) {
473 printk("jsflash: no \"reg\" property\n");
474 return -ENXIO;
475 }
476 if (reg0.which_io != 0) {
477 printk("jsflash: bus number nonzero: 0x%x:%x\n",
478 reg0.which_io, reg0.phys_addr);
479 return -ENXIO;
480 }
481 /*
482 * Flash may be somewhere else, for instance on Ebus.
483 * So, don't do the following check for IIep flash space.
484 */
485#if 0
486 if ((reg0.phys_addr >> 24) != 0x20) {
487 printk("jsflash: suspicious address: 0x%x:%x\n",
488 reg0.which_io, reg0.phys_addr);
489 return -ENXIO;
490 }
491#endif
492 if ((int)reg0.reg_size <= 0) {
493 printk("jsflash: bad size 0x%x\n", (int)reg0.reg_size);
494 return -ENXIO;
495 }
496 } else {
497 /* XXX Remove this code once PROLL ID12 got widespread */
498 printk("jsflash: no /flash-memory node, use PROLL >= 12\n");
499 prom_getproperty(prom_root_node, "banner-name", banner, 128);
500 if (strcmp (banner, "JavaStation-NC") != 0 &&
501 strcmp (banner, "JavaStation-E") != 0) {
502 return -ENXIO;
503 }
504 reg0.which_io = 0;
505 reg0.phys_addr = 0x20400000;
506 reg0.reg_size = 0x00800000;
507 }
508
509 /* Let us be really paranoid for modifications to probing code. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 if (sparc_cpu_model != sun4m) {
511 /* We must be on sun4m because we use MMU Bypass ASI. */
512 return -ENXIO;
513 }
514
515 if (jsf0.base == 0) {
516 jsf = &jsf0;
517
518 jsf->base = reg0.phys_addr;
519 jsf->size = reg0.reg_size;
520
521 /* XXX Redo the userland interface. */
522 jsf->id.off = JSF_BASE_ALL;
523 jsf->id.size = 0x01000000; /* 16M - all segments */
524 strcpy(jsf->id.name, "Krups_all");
525
526 jsf->dv[0].dbase = jsf->base;
527 jsf->dv[0].dsize = jsf->size;
528 jsf->dv[1].dbase = jsf->base + 1024;
529 jsf->dv[1].dsize = jsf->size - 1024;
530 jsf->dv[2].dbase = JSF_BASE_ALL;
531 jsf->dv[2].dsize = 0x01000000;
532
533 printk("Espresso Flash @0x%lx [%d MB]\n", jsf->base,
534 (int) (jsf->size / (1024*1024)));
535 }
536
537 if ((rc = misc_register(&jsf_dev)) != 0) {
538 printk(KERN_ERR "jsf: unable to get misc minor %d\n",
539 JSF_MINOR);
540 jsf0.base = 0;
541 return rc;
542 }
543
544 return 0;
545}
546
547static struct request_queue *jsf_queue;
548
549static int jsfd_init(void)
550{
551 static DEFINE_SPINLOCK(lock);
552 struct jsflash *jsf;
553 struct jsfd_part *jdp;
554 int err;
555 int i;
556
557 if (jsf0.base == 0)
558 return -ENXIO;
559
560 err = -ENOMEM;
561 for (i = 0; i < JSF_MAX; i++) {
562 struct gendisk *disk = alloc_disk(1);
563 if (!disk)
564 goto out;
565 jsfd_disk[i] = disk;
566 }
567
568 if (register_blkdev(JSFD_MAJOR, "jsfd")) {
569 err = -EIO;
570 goto out;
571 }
572
573 jsf_queue = blk_init_queue(jsfd_do_request, &lock);
574 if (!jsf_queue) {
575 err = -ENOMEM;
576 unregister_blkdev(JSFD_MAJOR, "jsfd");
577 goto out;
578 }
579
580 for (i = 0; i < JSF_MAX; i++) {
581 struct gendisk *disk = jsfd_disk[i];
582 if ((i & JSF_PART_MASK) >= JSF_NPART) continue;
583 jsf = &jsf0; /* actually, &jsfv[i >> JSF_PART_BITS] */
584 jdp = &jsf->dv[i&JSF_PART_MASK];
585
586 disk->major = JSFD_MAJOR;
587 disk->first_minor = i;
588 sprintf(disk->disk_name, "jsfd%d", i);
589 disk->fops = &jsfd_fops;
590 set_capacity(disk, jdp->dsize >> 9);
591 disk->private_data = jdp;
592 disk->queue = jsf_queue;
593 add_disk(disk);
594 set_disk_ro(disk, 1);
595 }
596 return 0;
597out:
598 while (i--)
599 put_disk(jsfd_disk[i]);
600 return err;
601}
602
603MODULE_LICENSE("GPL");
604
605static int __init jsflash_init_module(void) {
606 int rc;
607
608 if ((rc = jsflash_init()) == 0) {
609 jsfd_init();
610 return 0;
611 }
612 return rc;
613}
614
615static void __exit jsflash_cleanup_module(void)
616{
617 int i;
618
619 for (i = 0; i < JSF_MAX; i++) {
620 if ((i & JSF_PART_MASK) >= JSF_NPART) continue;
621 del_gendisk(jsfd_disk[i]);
622 put_disk(jsfd_disk[i]);
623 }
624 if (jsf0.busy)
625 printk("jsf0: cleaning busy unit\n");
626 jsf0.base = 0;
627 jsf0.busy = 0;
628
629 misc_deregister(&jsf_dev);
Akinobu Mita00d59402007-07-17 04:03:46 -0700630 unregister_blkdev(JSFD_MAJOR, "jsfd");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 blk_cleanup_queue(jsf_queue);
632}
633
634module_init(jsflash_init_module);
635module_exit(jsflash_cleanup_module);