Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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 | |
16 | * procedure. In the same time it is exeedingly dangerous because | |
17 | * 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> | |
28fbbf49 | 30 | #include <linux/smp_lock.h> |
1da177e4 LT |
31 | #include <linux/types.h> |
32 | #include <linux/errno.h> | |
33 | #include <linux/miscdevice.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/fcntl.h> | |
36 | #include <linux/poll.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/string.h> | |
1da177e4 LT |
39 | #include <linux/genhd.h> |
40 | #include <linux/blkdev.h> | |
1da177e4 LT |
41 | #include <asm/uaccess.h> |
42 | #include <asm/pgtable.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/pcic.h> | |
45 | #include <asm/oplib.h> | |
46 | ||
47 | #include <asm/jsflash.h> /* ioctl arguments. <linux/> ?? */ | |
48 | #define JSFIDSZ (sizeof(struct jsflash_ident_arg)) | |
49 | #define JSFPRGSZ (sizeof(struct jsflash_program_arg)) | |
50 | ||
51 | /* | |
52 | * Our device numbers have no business in system headers. | |
53 | * The only thing a user knows is the device name /dev/jsflash. | |
54 | * | |
55 | * Block devices are laid out like this: | |
56 | * minor+0 - Bootstrap, for 8MB SIMM 0x20400000[0x800000] | |
57 | * minor+1 - Filesystem to mount, normally 0x20400400[0x7ffc00] | |
58 | * minor+2 - Whole flash area for any case... 0x20000000[0x01000000] | |
59 | * Total 3 minors per flash device. | |
60 | * | |
61 | * It is easier to have static size vectors, so we define | |
62 | * a total minor range JSF_MAX, which must cover all minors. | |
63 | */ | |
64 | /* character device */ | |
65 | #define JSF_MINOR 178 /* 178 is registered with hpa */ | |
66 | /* block device */ | |
67 | #define JSF_MAX 3 /* 3 minors wasted total so far. */ | |
68 | #define JSF_NPART 3 /* 3 minors per flash device */ | |
69 | #define JSF_PART_BITS 2 /* 2 bits of minors to cover JSF_NPART */ | |
70 | #define JSF_PART_MASK 0x3 /* 2 bits mask */ | |
71 | ||
72 | /* | |
73 | * Access functions. | |
74 | * We could ioremap(), but it's easier this way. | |
75 | */ | |
76 | static unsigned int jsf_inl(unsigned long addr) | |
77 | { | |
78 | unsigned long retval; | |
79 | ||
80 | __asm__ __volatile__("lda [%1] %2, %0\n\t" : | |
81 | "=r" (retval) : | |
82 | "r" (addr), "i" (ASI_M_BYPASS)); | |
83 | return retval; | |
84 | } | |
85 | ||
86 | static void jsf_outl(unsigned long addr, __u32 data) | |
87 | { | |
88 | ||
89 | __asm__ __volatile__("sta %0, [%1] %2\n\t" : : | |
90 | "r" (data), "r" (addr), "i" (ASI_M_BYPASS) : | |
91 | "memory"); | |
92 | } | |
93 | ||
94 | /* | |
95 | * soft carrier | |
96 | */ | |
97 | ||
98 | struct jsfd_part { | |
99 | unsigned long dbase; | |
100 | unsigned long dsize; | |
101 | }; | |
102 | ||
103 | struct jsflash { | |
104 | unsigned long base; | |
105 | unsigned long size; | |
106 | unsigned long busy; /* In use? */ | |
107 | struct jsflash_ident_arg id; | |
108 | /* int mbase; */ /* Minor base, typically zero */ | |
109 | struct jsfd_part dv[JSF_NPART]; | |
110 | }; | |
111 | ||
112 | /* | |
113 | * We do not map normal memory or obio as a safety precaution. | |
114 | * But offsets are real, for ease of userland programming. | |
115 | */ | |
116 | #define JSF_BASE_TOP 0x30000000 | |
117 | #define JSF_BASE_ALL 0x20000000 | |
118 | ||
119 | #define JSF_BASE_JK 0x20400000 | |
120 | ||
121 | /* | |
122 | */ | |
123 | static struct gendisk *jsfd_disk[JSF_MAX]; | |
124 | ||
125 | /* | |
126 | * Let's pretend we may have several of these... | |
127 | */ | |
128 | static struct jsflash jsf0; | |
129 | ||
130 | /* | |
131 | * Wait for AMD to finish its embedded algorithm. | |
132 | * We use the Toggle bit DQ6 (0x40) because it does not | |
133 | * depend on the data value as /DATA bit DQ7 does. | |
134 | * | |
135 | * XXX Do we need any timeout here? So far it never hanged, beware broken hw. | |
136 | */ | |
137 | static void jsf_wait(unsigned long p) { | |
138 | unsigned int x1, x2; | |
139 | ||
140 | for (;;) { | |
141 | x1 = jsf_inl(p); | |
142 | x2 = jsf_inl(p); | |
143 | if ((x1 & 0x40404040) == (x2 & 0x40404040)) return; | |
144 | } | |
145 | } | |
146 | ||
147 | /* | |
148 | * Programming will only work if Flash is clean, | |
149 | * we leave it to the programmer application. | |
150 | * | |
151 | * AMD must be programmed one byte at a time; | |
152 | * thus, Simple Tech SIMM must be written 4 bytes at a time. | |
153 | * | |
154 | * Write waits for the chip to become ready after the write | |
155 | * was finished. This is done so that application would read | |
156 | * consistent data after the write is done. | |
157 | */ | |
158 | static void jsf_write4(unsigned long fa, u32 data) { | |
159 | ||
160 | jsf_outl(fa, 0xAAAAAAAA); /* Unlock 1 Write 1 */ | |
161 | jsf_outl(fa, 0x55555555); /* Unlock 1 Write 2 */ | |
162 | jsf_outl(fa, 0xA0A0A0A0); /* Byte Program */ | |
163 | jsf_outl(fa, data); | |
164 | ||
165 | jsf_wait(fa); | |
166 | } | |
167 | ||
168 | /* | |
169 | */ | |
170 | static void jsfd_read(char *buf, unsigned long p, size_t togo) { | |
171 | union byte4 { | |
172 | char s[4]; | |
173 | unsigned int n; | |
174 | } b; | |
175 | ||
176 | while (togo >= 4) { | |
177 | togo -= 4; | |
178 | b.n = jsf_inl(p); | |
179 | memcpy(buf, b.s, 4); | |
180 | p += 4; | |
181 | buf += 4; | |
182 | } | |
183 | } | |
184 | ||
165125e1 | 185 | static void jsfd_do_request(struct request_queue *q) |
1da177e4 LT |
186 | { |
187 | struct request *req; | |
188 | ||
6b0bf407 TH |
189 | req = elv_next_request(q); |
190 | if (req) | |
191 | blkdev_dequeue_request(req); | |
192 | ||
193 | while (req) { | |
1da177e4 | 194 | struct jsfd_part *jdp = req->rq_disk->private_data; |
83096ebf | 195 | unsigned long offset = blk_rq_pos(req) << 9; |
1011c1b9 | 196 | size_t len = blk_rq_cur_bytes(req); |
6b0bf407 | 197 | int err = -EIO; |
1da177e4 | 198 | |
6b0bf407 TH |
199 | if ((offset + len) > jdp->dsize) |
200 | goto end; | |
1da177e4 LT |
201 | |
202 | if (rq_data_dir(req) != READ) { | |
203 | printk(KERN_ERR "jsfd: write\n"); | |
6b0bf407 | 204 | goto end; |
1da177e4 LT |
205 | } |
206 | ||
207 | if ((jdp->dbase & 0xff000000) != 0x20000000) { | |
208 | printk(KERN_ERR "jsfd: bad base %x\n", (int)jdp->dbase); | |
6b0bf407 | 209 | goto end; |
1da177e4 LT |
210 | } |
211 | ||
212 | jsfd_read(req->buffer, jdp->dbase + offset, len); | |
6b0bf407 TH |
213 | err = 0; |
214 | end: | |
215 | if (!__blk_end_request_cur(req, err)) { | |
216 | req = elv_next_request(q); | |
217 | if (req) | |
218 | blkdev_dequeue_request(req); | |
219 | } | |
1da177e4 LT |
220 | } |
221 | } | |
222 | ||
223 | /* | |
224 | * The memory devices use the full 32/64 bits of the offset, and so we cannot | |
225 | * check against negative addresses: they are ok. The return value is weird, | |
226 | * though, in that case (0). | |
227 | * | |
228 | * also note that seeking relative to the "end of file" isn't supported: | |
229 | * it has no meaning, so it returns -EINVAL. | |
230 | */ | |
231 | static loff_t jsf_lseek(struct file * file, loff_t offset, int orig) | |
232 | { | |
233 | loff_t ret; | |
234 | ||
235 | lock_kernel(); | |
236 | switch (orig) { | |
237 | case 0: | |
238 | file->f_pos = offset; | |
239 | ret = file->f_pos; | |
240 | break; | |
241 | case 1: | |
242 | file->f_pos += offset; | |
243 | ret = file->f_pos; | |
244 | break; | |
245 | default: | |
246 | ret = -EINVAL; | |
247 | } | |
248 | unlock_kernel(); | |
249 | return ret; | |
250 | } | |
251 | ||
252 | /* | |
253 | * OS SIMM Cannot be read in other size but a 32bits word. | |
254 | */ | |
bc05d83b | 255 | static ssize_t jsf_read(struct file * file, char __user * buf, |
1da177e4 LT |
256 | size_t togo, loff_t *ppos) |
257 | { | |
258 | unsigned long p = *ppos; | |
bc05d83b | 259 | char __user *tmp = buf; |
1da177e4 LT |
260 | |
261 | union byte4 { | |
262 | char s[4]; | |
263 | unsigned int n; | |
264 | } b; | |
265 | ||
266 | if (p < JSF_BASE_ALL || p >= JSF_BASE_TOP) { | |
267 | return 0; | |
268 | } | |
269 | ||
270 | if ((p + togo) < p /* wrap */ | |
271 | || (p + togo) >= JSF_BASE_TOP) { | |
272 | togo = JSF_BASE_TOP - p; | |
273 | } | |
274 | ||
275 | if (p < JSF_BASE_ALL && togo != 0) { | |
276 | #if 0 /* __bzero XXX */ | |
277 | size_t x = JSF_BASE_ALL - p; | |
278 | if (x > togo) x = togo; | |
279 | clear_user(tmp, x); | |
280 | tmp += x; | |
281 | p += x; | |
282 | togo -= x; | |
283 | #else | |
284 | /* | |
285 | * Implementation of clear_user() calls __bzero | |
286 | * without regard to modversions, | |
287 | * so we cannot build a module. | |
288 | */ | |
289 | return 0; | |
290 | #endif | |
291 | } | |
292 | ||
293 | while (togo >= 4) { | |
294 | togo -= 4; | |
295 | b.n = jsf_inl(p); | |
296 | if (copy_to_user(tmp, b.s, 4)) | |
297 | return -EFAULT; | |
298 | tmp += 4; | |
299 | p += 4; | |
300 | } | |
301 | ||
302 | /* | |
303 | * XXX Small togo may remain if 1 byte is ordered. | |
304 | * It would be nice if we did a word size read and unpacked it. | |
305 | */ | |
306 | ||
307 | *ppos = p; | |
308 | return tmp-buf; | |
309 | } | |
310 | ||
bc05d83b | 311 | static ssize_t jsf_write(struct file * file, const char __user * buf, |
1da177e4 LT |
312 | size_t count, loff_t *ppos) |
313 | { | |
314 | return -ENOSPC; | |
315 | } | |
316 | ||
317 | /* | |
318 | */ | |
319 | static int jsf_ioctl_erase(unsigned long arg) | |
320 | { | |
321 | unsigned long p; | |
322 | ||
323 | /* p = jsf0.base; hits wrong bank */ | |
324 | p = 0x20400000; | |
325 | ||
326 | jsf_outl(p, 0xAAAAAAAA); /* Unlock 1 Write 1 */ | |
327 | jsf_outl(p, 0x55555555); /* Unlock 1 Write 2 */ | |
328 | jsf_outl(p, 0x80808080); /* Erase setup */ | |
329 | jsf_outl(p, 0xAAAAAAAA); /* Unlock 2 Write 1 */ | |
330 | jsf_outl(p, 0x55555555); /* Unlock 2 Write 2 */ | |
331 | jsf_outl(p, 0x10101010); /* Chip erase */ | |
332 | ||
333 | #if 0 | |
334 | /* | |
335 | * This code is ok, except that counter based timeout | |
336 | * has no place in this world. Let's just drop timeouts... | |
337 | */ | |
338 | { | |
339 | int i; | |
340 | __u32 x; | |
341 | for (i = 0; i < 1000000; i++) { | |
342 | x = jsf_inl(p); | |
343 | if ((x & 0x80808080) == 0x80808080) break; | |
344 | } | |
345 | if ((x & 0x80808080) != 0x80808080) { | |
346 | printk("jsf0: erase timeout with 0x%08x\n", x); | |
347 | } else { | |
348 | printk("jsf0: erase done with 0x%08x\n", x); | |
349 | } | |
350 | } | |
351 | #else | |
352 | jsf_wait(p); | |
353 | #endif | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Program a block of flash. | |
360 | * Very simple because we can do it byte by byte anyway. | |
361 | */ | |
bc05d83b | 362 | static int jsf_ioctl_program(void __user *arg) |
1da177e4 LT |
363 | { |
364 | struct jsflash_program_arg abuf; | |
bc05d83b | 365 | char __user *uptr; |
1da177e4 LT |
366 | unsigned long p; |
367 | unsigned int togo; | |
368 | union { | |
369 | unsigned int n; | |
370 | char s[4]; | |
371 | } b; | |
372 | ||
bc05d83b | 373 | if (copy_from_user(&abuf, arg, JSFPRGSZ)) |
1da177e4 LT |
374 | return -EFAULT; |
375 | p = abuf.off; | |
376 | togo = abuf.size; | |
377 | if ((togo & 3) || (p & 3)) return -EINVAL; | |
378 | ||
bc05d83b | 379 | uptr = (char __user *) (unsigned long) abuf.data; |
1da177e4 LT |
380 | while (togo != 0) { |
381 | togo -= 4; | |
382 | if (copy_from_user(&b.s[0], uptr, 4)) | |
383 | return -EFAULT; | |
384 | jsf_write4(p, b.n); | |
385 | p += 4; | |
386 | uptr += 4; | |
387 | } | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
6c0f8bc7 | 392 | static long jsf_ioctl(struct file *f, unsigned int cmd, unsigned long arg) |
1da177e4 | 393 | { |
6c0f8bc7 | 394 | lock_kernel(); |
1da177e4 | 395 | int error = -ENOTTY; |
bc05d83b | 396 | void __user *argp = (void __user *)arg; |
1da177e4 | 397 | |
6c0f8bc7 SG |
398 | if (!capable(CAP_SYS_ADMIN)) { |
399 | unlock_kernel(); | |
1da177e4 | 400 | return -EPERM; |
6c0f8bc7 | 401 | } |
1da177e4 LT |
402 | switch (cmd) { |
403 | case JSFLASH_IDENT: | |
6c0f8bc7 SG |
404 | if (copy_to_user(argp, &jsf0.id, JSFIDSZ)) { |
405 | unlock_kernel(); | |
1da177e4 | 406 | return -EFAULT; |
6c0f8bc7 | 407 | } |
1da177e4 LT |
408 | break; |
409 | case JSFLASH_ERASE: | |
410 | error = jsf_ioctl_erase(arg); | |
411 | break; | |
412 | case JSFLASH_PROGRAM: | |
bc05d83b | 413 | error = jsf_ioctl_program(argp); |
1da177e4 LT |
414 | break; |
415 | } | |
416 | ||
6c0f8bc7 | 417 | unlock_kernel(); |
1da177e4 LT |
418 | return error; |
419 | } | |
420 | ||
421 | static int jsf_mmap(struct file * file, struct vm_area_struct * vma) | |
422 | { | |
423 | return -ENXIO; | |
424 | } | |
425 | ||
426 | static int jsf_open(struct inode * inode, struct file * filp) | |
427 | { | |
28fbbf49 AB |
428 | lock_kernel(); |
429 | if (jsf0.base == 0) { | |
430 | unlock_kernel(); | |
431 | return -ENXIO; | |
432 | } | |
433 | if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) { | |
434 | unlock_kernel(); | |
1da177e4 | 435 | return -EBUSY; |
28fbbf49 | 436 | } |
1da177e4 | 437 | |
28fbbf49 | 438 | unlock_kernel(); |
1da177e4 LT |
439 | return 0; /* XXX What security? */ |
440 | } | |
441 | ||
442 | static int jsf_release(struct inode *inode, struct file *file) | |
443 | { | |
444 | jsf0.busy = 0; | |
445 | return 0; | |
446 | } | |
447 | ||
00977a59 | 448 | static const struct file_operations jsf_fops = { |
1da177e4 LT |
449 | .owner = THIS_MODULE, |
450 | .llseek = jsf_lseek, | |
451 | .read = jsf_read, | |
452 | .write = jsf_write, | |
6c0f8bc7 | 453 | .unlocked_ioctl = jsf_ioctl, |
1da177e4 LT |
454 | .mmap = jsf_mmap, |
455 | .open = jsf_open, | |
456 | .release = jsf_release, | |
457 | }; | |
458 | ||
459 | static struct miscdevice jsf_dev = { JSF_MINOR, "jsflash", &jsf_fops }; | |
460 | ||
461 | static struct block_device_operations jsfd_fops = { | |
462 | .owner = THIS_MODULE, | |
463 | }; | |
464 | ||
465 | static int jsflash_init(void) | |
466 | { | |
467 | int rc; | |
468 | struct jsflash *jsf; | |
469 | int node; | |
470 | char banner[128]; | |
471 | struct linux_prom_registers reg0; | |
472 | ||
473 | node = prom_getchild(prom_root_node); | |
474 | node = prom_searchsiblings(node, "flash-memory"); | |
475 | if (node != 0 && node != -1) { | |
476 | if (prom_getproperty(node, "reg", | |
477 | (char *)®0, sizeof(reg0)) == -1) { | |
478 | printk("jsflash: no \"reg\" property\n"); | |
479 | return -ENXIO; | |
480 | } | |
481 | if (reg0.which_io != 0) { | |
482 | printk("jsflash: bus number nonzero: 0x%x:%x\n", | |
483 | reg0.which_io, reg0.phys_addr); | |
484 | return -ENXIO; | |
485 | } | |
486 | /* | |
487 | * Flash may be somewhere else, for instance on Ebus. | |
488 | * So, don't do the following check for IIep flash space. | |
489 | */ | |
490 | #if 0 | |
491 | if ((reg0.phys_addr >> 24) != 0x20) { | |
492 | printk("jsflash: suspicious address: 0x%x:%x\n", | |
493 | reg0.which_io, reg0.phys_addr); | |
494 | return -ENXIO; | |
495 | } | |
496 | #endif | |
497 | if ((int)reg0.reg_size <= 0) { | |
498 | printk("jsflash: bad size 0x%x\n", (int)reg0.reg_size); | |
499 | return -ENXIO; | |
500 | } | |
501 | } else { | |
502 | /* XXX Remove this code once PROLL ID12 got widespread */ | |
503 | printk("jsflash: no /flash-memory node, use PROLL >= 12\n"); | |
504 | prom_getproperty(prom_root_node, "banner-name", banner, 128); | |
505 | if (strcmp (banner, "JavaStation-NC") != 0 && | |
506 | strcmp (banner, "JavaStation-E") != 0) { | |
507 | return -ENXIO; | |
508 | } | |
509 | reg0.which_io = 0; | |
510 | reg0.phys_addr = 0x20400000; | |
511 | reg0.reg_size = 0x00800000; | |
512 | } | |
513 | ||
514 | /* Let us be really paranoid for modifications to probing code. */ | |
515 | /* extern enum sparc_cpu sparc_cpu_model; */ /* in <asm/system.h> */ | |
516 | if (sparc_cpu_model != sun4m) { | |
517 | /* We must be on sun4m because we use MMU Bypass ASI. */ | |
518 | return -ENXIO; | |
519 | } | |
520 | ||
521 | if (jsf0.base == 0) { | |
522 | jsf = &jsf0; | |
523 | ||
524 | jsf->base = reg0.phys_addr; | |
525 | jsf->size = reg0.reg_size; | |
526 | ||
527 | /* XXX Redo the userland interface. */ | |
528 | jsf->id.off = JSF_BASE_ALL; | |
529 | jsf->id.size = 0x01000000; /* 16M - all segments */ | |
530 | strcpy(jsf->id.name, "Krups_all"); | |
531 | ||
532 | jsf->dv[0].dbase = jsf->base; | |
533 | jsf->dv[0].dsize = jsf->size; | |
534 | jsf->dv[1].dbase = jsf->base + 1024; | |
535 | jsf->dv[1].dsize = jsf->size - 1024; | |
536 | jsf->dv[2].dbase = JSF_BASE_ALL; | |
537 | jsf->dv[2].dsize = 0x01000000; | |
538 | ||
539 | printk("Espresso Flash @0x%lx [%d MB]\n", jsf->base, | |
540 | (int) (jsf->size / (1024*1024))); | |
541 | } | |
542 | ||
543 | if ((rc = misc_register(&jsf_dev)) != 0) { | |
544 | printk(KERN_ERR "jsf: unable to get misc minor %d\n", | |
545 | JSF_MINOR); | |
546 | jsf0.base = 0; | |
547 | return rc; | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static struct request_queue *jsf_queue; | |
554 | ||
555 | static int jsfd_init(void) | |
556 | { | |
557 | static DEFINE_SPINLOCK(lock); | |
558 | struct jsflash *jsf; | |
559 | struct jsfd_part *jdp; | |
560 | int err; | |
561 | int i; | |
562 | ||
563 | if (jsf0.base == 0) | |
564 | return -ENXIO; | |
565 | ||
566 | err = -ENOMEM; | |
567 | for (i = 0; i < JSF_MAX; i++) { | |
568 | struct gendisk *disk = alloc_disk(1); | |
569 | if (!disk) | |
570 | goto out; | |
571 | jsfd_disk[i] = disk; | |
572 | } | |
573 | ||
574 | if (register_blkdev(JSFD_MAJOR, "jsfd")) { | |
575 | err = -EIO; | |
576 | goto out; | |
577 | } | |
578 | ||
579 | jsf_queue = blk_init_queue(jsfd_do_request, &lock); | |
580 | if (!jsf_queue) { | |
581 | err = -ENOMEM; | |
582 | unregister_blkdev(JSFD_MAJOR, "jsfd"); | |
583 | goto out; | |
584 | } | |
585 | ||
586 | for (i = 0; i < JSF_MAX; i++) { | |
587 | struct gendisk *disk = jsfd_disk[i]; | |
588 | if ((i & JSF_PART_MASK) >= JSF_NPART) continue; | |
589 | jsf = &jsf0; /* actually, &jsfv[i >> JSF_PART_BITS] */ | |
590 | jdp = &jsf->dv[i&JSF_PART_MASK]; | |
591 | ||
592 | disk->major = JSFD_MAJOR; | |
593 | disk->first_minor = i; | |
594 | sprintf(disk->disk_name, "jsfd%d", i); | |
595 | disk->fops = &jsfd_fops; | |
596 | set_capacity(disk, jdp->dsize >> 9); | |
597 | disk->private_data = jdp; | |
598 | disk->queue = jsf_queue; | |
599 | add_disk(disk); | |
600 | set_disk_ro(disk, 1); | |
601 | } | |
602 | return 0; | |
603 | out: | |
604 | while (i--) | |
605 | put_disk(jsfd_disk[i]); | |
606 | return err; | |
607 | } | |
608 | ||
609 | MODULE_LICENSE("GPL"); | |
610 | ||
611 | static int __init jsflash_init_module(void) { | |
612 | int rc; | |
613 | ||
614 | if ((rc = jsflash_init()) == 0) { | |
615 | jsfd_init(); | |
616 | return 0; | |
617 | } | |
618 | return rc; | |
619 | } | |
620 | ||
621 | static void __exit jsflash_cleanup_module(void) | |
622 | { | |
623 | int i; | |
624 | ||
625 | for (i = 0; i < JSF_MAX; i++) { | |
626 | if ((i & JSF_PART_MASK) >= JSF_NPART) continue; | |
627 | del_gendisk(jsfd_disk[i]); | |
628 | put_disk(jsfd_disk[i]); | |
629 | } | |
630 | if (jsf0.busy) | |
631 | printk("jsf0: cleaning busy unit\n"); | |
632 | jsf0.base = 0; | |
633 | jsf0.busy = 0; | |
634 | ||
635 | misc_deregister(&jsf_dev); | |
00d59405 | 636 | unregister_blkdev(JSFD_MAJOR, "jsfd"); |
1da177e4 LT |
637 | blk_cleanup_queue(jsf_queue); |
638 | } | |
639 | ||
640 | module_init(jsflash_init_module); | |
641 | module_exit(jsflash_cleanup_module); |