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1/*
2 * PS3 FLASH ROM Storage Driver
3 *
4 * Copyright (C) 2007 Sony Computer Entertainment Inc.
5 * Copyright 2007 Sony Corp.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published
9 * by the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21#include <linux/fs.h>
22#include <linux/miscdevice.h>
23#include <linux/slab.h>
24#include <linux/uaccess.h>
25
26#include <asm/lv1call.h>
27#include <asm/ps3stor.h>
28
29
30#define DEVICE_NAME "ps3flash"
31
32#define FLASH_BLOCK_SIZE (256*1024)
33
34
35struct ps3flash_private {
36 struct mutex mutex; /* Bounce buffer mutex */
37 u64 chunk_sectors;
38 int tag; /* Start sector of buffer, -1 if invalid */
39 bool dirty;
40};
41
42static struct ps3_storage_device *ps3flash_dev;
43
44static int ps3flash_read_write_sectors(struct ps3_storage_device *dev,
45 u64 start_sector, int write)
46{
47 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
48 u64 res = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
49 start_sector, priv->chunk_sectors,
50 write);
51 if (res) {
52 dev_err(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
53 __LINE__, write ? "write" : "read", res);
54 return -EIO;
55 }
56 return 0;
57}
58
59static int ps3flash_writeback(struct ps3_storage_device *dev)
60{
61 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
62 int res;
63
64 if (!priv->dirty || priv->tag < 0)
65 return 0;
66
67 res = ps3flash_read_write_sectors(dev, priv->tag, 1);
68 if (res)
69 return res;
70
71 priv->dirty = false;
72 return 0;
73}
74
75static int ps3flash_fetch(struct ps3_storage_device *dev, u64 start_sector)
76{
77 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
78 int res;
79
80 if (start_sector == priv->tag)
81 return 0;
82
83 res = ps3flash_writeback(dev);
84 if (res)
85 return res;
86
87 priv->tag = -1;
88
89 res = ps3flash_read_write_sectors(dev, start_sector, 0);
90 if (res)
91 return res;
92
93 priv->tag = start_sector;
94 return 0;
95}
96
97static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
98{
99 struct ps3_storage_device *dev = ps3flash_dev;
100 loff_t res;
101
102 mutex_lock(&file->f_mapping->host->i_mutex);
103 switch (origin) {
104 case 0:
105 break;
106 case 1:
107 offset += file->f_pos;
108 break;
109 case 2:
110 offset += dev->regions[dev->region_idx].size*dev->blk_size;
111 break;
112 default:
113 offset = -1;
114 }
115 if (offset < 0) {
116 res = -EINVAL;
117 goto out;
118 }
119
120 file->f_pos = offset;
121 res = file->f_pos;
122
123out:
124 mutex_unlock(&file->f_mapping->host->i_mutex);
125 return res;
126}
127
128static ssize_t ps3flash_read(char __user *userbuf, void *kernelbuf,
129 size_t count, loff_t *pos)
130{
131 struct ps3_storage_device *dev = ps3flash_dev;
132 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
133 u64 size, sector, offset;
134 int res;
135 size_t remaining, n;
136 const void *src;
137
138 dev_dbg(&dev->sbd.core,
139 "%s:%u: Reading %zu bytes at position %lld to U0x%p/K0x%p\n",
140 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
141
142 size = dev->regions[dev->region_idx].size*dev->blk_size;
143 if (*pos >= size || !count)
144 return 0;
145
146 if (*pos + count > size) {
147 dev_dbg(&dev->sbd.core,
148 "%s:%u Truncating count from %zu to %llu\n", __func__,
149 __LINE__, count, size - *pos);
150 count = size - *pos;
151 }
152
153 sector = *pos / dev->bounce_size * priv->chunk_sectors;
154 offset = *pos % dev->bounce_size;
155
156 remaining = count;
157 do {
158 n = min_t(u64, remaining, dev->bounce_size - offset);
159 src = dev->bounce_buf + offset;
160
161 mutex_lock(&priv->mutex);
162
163 res = ps3flash_fetch(dev, sector);
164 if (res)
165 goto fail;
166
167 dev_dbg(&dev->sbd.core,
168 "%s:%u: copy %lu bytes from 0x%p to U0x%p/K0x%p\n",
169 __func__, __LINE__, n, src, userbuf, kernelbuf);
170 if (userbuf) {
171 if (copy_to_user(userbuf, src, n)) {
172 res = -EFAULT;
173 goto fail;
174 }
175 userbuf += n;
176 }
177 if (kernelbuf) {
178 memcpy(kernelbuf, src, n);
179 kernelbuf += n;
180 }
181
182 mutex_unlock(&priv->mutex);
183
184 *pos += n;
185 remaining -= n;
186 sector += priv->chunk_sectors;
187 offset = 0;
188 } while (remaining > 0);
189
190 return count;
191
192fail:
193 mutex_unlock(&priv->mutex);
194 return res;
195}
196
197static ssize_t ps3flash_write(const char __user *userbuf,
198 const void *kernelbuf, size_t count, loff_t *pos)
199{
200 struct ps3_storage_device *dev = ps3flash_dev;
201 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
202 u64 size, sector, offset;
203 int res = 0;
204 size_t remaining, n;
205 void *dst;
206
207 dev_dbg(&dev->sbd.core,
208 "%s:%u: Writing %zu bytes at position %lld from U0x%p/K0x%p\n",
209 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
210
211 size = dev->regions[dev->region_idx].size*dev->blk_size;
212 if (*pos >= size || !count)
213 return 0;
214
215 if (*pos + count > size) {
216 dev_dbg(&dev->sbd.core,
217 "%s:%u Truncating count from %zu to %llu\n", __func__,
218 __LINE__, count, size - *pos);
219 count = size - *pos;
220 }
221
222 sector = *pos / dev->bounce_size * priv->chunk_sectors;
223 offset = *pos % dev->bounce_size;
224
225 remaining = count;
226 do {
227 n = min_t(u64, remaining, dev->bounce_size - offset);
228 dst = dev->bounce_buf + offset;
229
230 mutex_lock(&priv->mutex);
231
232 if (n != dev->bounce_size)
233 res = ps3flash_fetch(dev, sector);
234 else if (sector != priv->tag)
235 res = ps3flash_writeback(dev);
236 if (res)
237 goto fail;
238
239 dev_dbg(&dev->sbd.core,
240 "%s:%u: copy %lu bytes from U0x%p/K0x%p to 0x%p\n",
241 __func__, __LINE__, n, userbuf, kernelbuf, dst);
242 if (userbuf) {
243 if (copy_from_user(dst, userbuf, n)) {
244 res = -EFAULT;
245 goto fail;
246 }
247 userbuf += n;
248 }
249 if (kernelbuf) {
250 memcpy(dst, kernelbuf, n);
251 kernelbuf += n;
252 }
253
254 priv->tag = sector;
255 priv->dirty = true;
256
257 mutex_unlock(&priv->mutex);
258
259 *pos += n;
260 remaining -= n;
261 sector += priv->chunk_sectors;
262 offset = 0;
263 } while (remaining > 0);
264
265 return count;
266
267fail:
268 mutex_unlock(&priv->mutex);
269 return res;
270}
271
272static ssize_t ps3flash_user_read(struct file *file, char __user *buf,
273 size_t count, loff_t *pos)
274{
275 return ps3flash_read(buf, NULL, count, pos);
276}
277
278static ssize_t ps3flash_user_write(struct file *file, const char __user *buf,
279 size_t count, loff_t *pos)
280{
281 return ps3flash_write(buf, NULL, count, pos);
282}
283
284static ssize_t ps3flash_kernel_read(void *buf, size_t count, loff_t pos)
285{
286 return ps3flash_read(NULL, buf, count, &pos);
287}
288
289static ssize_t ps3flash_kernel_write(const void *buf, size_t count,
290 loff_t pos)
291{
292 ssize_t res;
293 int wb;
294
295 res = ps3flash_write(NULL, buf, count, &pos);
296 if (res < 0)
297 return res;
298
299 /* Make kernel writes synchronous */
300 wb = ps3flash_writeback(ps3flash_dev);
301 if (wb)
302 return wb;
303
304 return res;
305}
306
307static int ps3flash_flush(struct file *file, fl_owner_t id)
308{
309 return ps3flash_writeback(ps3flash_dev);
310}
311
312static int ps3flash_fsync(struct file *file, loff_t start, loff_t end, int datasync)
313{
314 struct inode *inode = file->f_path.dentry->d_inode;
315 int err;
316 mutex_lock(&inode->i_mutex);
317 err = ps3flash_writeback(ps3flash_dev);
318 mutex_unlock(&inode->i_mutex);
319 return err;
320}
321
322static irqreturn_t ps3flash_interrupt(int irq, void *data)
323{
324 struct ps3_storage_device *dev = data;
325 int res;
326 u64 tag, status;
327
328 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
329
330 if (tag != dev->tag)
331 dev_err(&dev->sbd.core,
332 "%s:%u: tag mismatch, got %llx, expected %llx\n",
333 __func__, __LINE__, tag, dev->tag);
334
335 if (res) {
336 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
337 __func__, __LINE__, res, status);
338 } else {
339 dev->lv1_status = status;
340 complete(&dev->done);
341 }
342 return IRQ_HANDLED;
343}
344
345static const struct file_operations ps3flash_fops = {
346 .owner = THIS_MODULE,
347 .llseek = ps3flash_llseek,
348 .read = ps3flash_user_read,
349 .write = ps3flash_user_write,
350 .flush = ps3flash_flush,
351 .fsync = ps3flash_fsync,
352};
353
354static const struct ps3_os_area_flash_ops ps3flash_kernel_ops = {
355 .read = ps3flash_kernel_read,
356 .write = ps3flash_kernel_write,
357};
358
359static struct miscdevice ps3flash_misc = {
360 .minor = MISC_DYNAMIC_MINOR,
361 .name = DEVICE_NAME,
362 .fops = &ps3flash_fops,
363};
364
365static int __devinit ps3flash_probe(struct ps3_system_bus_device *_dev)
366{
367 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
368 struct ps3flash_private *priv;
369 int error;
370 unsigned long tmp;
371
372 tmp = dev->regions[dev->region_idx].start*dev->blk_size;
373 if (tmp % FLASH_BLOCK_SIZE) {
374 dev_err(&dev->sbd.core,
375 "%s:%u region start %lu is not aligned\n", __func__,
376 __LINE__, tmp);
377 return -EINVAL;
378 }
379 tmp = dev->regions[dev->region_idx].size*dev->blk_size;
380 if (tmp % FLASH_BLOCK_SIZE) {
381 dev_err(&dev->sbd.core,
382 "%s:%u region size %lu is not aligned\n", __func__,
383 __LINE__, tmp);
384 return -EINVAL;
385 }
386
387 /* use static buffer, kmalloc cannot allocate 256 KiB */
388 if (!ps3flash_bounce_buffer.address)
389 return -ENODEV;
390
391 if (ps3flash_dev) {
392 dev_err(&dev->sbd.core,
393 "Only one FLASH device is supported\n");
394 return -EBUSY;
395 }
396
397 ps3flash_dev = dev;
398
399 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
400 if (!priv) {
401 error = -ENOMEM;
402 goto fail;
403 }
404
405 ps3_system_bus_set_drvdata(&dev->sbd, priv);
406 mutex_init(&priv->mutex);
407 priv->tag = -1;
408
409 dev->bounce_size = ps3flash_bounce_buffer.size;
410 dev->bounce_buf = ps3flash_bounce_buffer.address;
411 priv->chunk_sectors = dev->bounce_size / dev->blk_size;
412
413 error = ps3stor_setup(dev, ps3flash_interrupt);
414 if (error)
415 goto fail_free_priv;
416
417 ps3flash_misc.parent = &dev->sbd.core;
418 error = misc_register(&ps3flash_misc);
419 if (error) {
420 dev_err(&dev->sbd.core, "%s:%u: misc_register failed %d\n",
421 __func__, __LINE__, error);
422 goto fail_teardown;
423 }
424
425 dev_info(&dev->sbd.core, "%s:%u: registered misc device %d\n",
426 __func__, __LINE__, ps3flash_misc.minor);
427
428 ps3_os_area_flash_register(&ps3flash_kernel_ops);
429 return 0;
430
431fail_teardown:
432 ps3stor_teardown(dev);
433fail_free_priv:
434 kfree(priv);
435 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
436fail:
437 ps3flash_dev = NULL;
438 return error;
439}
440
441static int ps3flash_remove(struct ps3_system_bus_device *_dev)
442{
443 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
444
445 ps3_os_area_flash_register(NULL);
446 misc_deregister(&ps3flash_misc);
447 ps3stor_teardown(dev);
448 kfree(ps3_system_bus_get_drvdata(&dev->sbd));
449 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
450 ps3flash_dev = NULL;
451 return 0;
452}
453
454
455static struct ps3_system_bus_driver ps3flash = {
456 .match_id = PS3_MATCH_ID_STOR_FLASH,
457 .core.name = DEVICE_NAME,
458 .core.owner = THIS_MODULE,
459 .probe = ps3flash_probe,
460 .remove = ps3flash_remove,
461 .shutdown = ps3flash_remove,
462};
463
464
465static int __init ps3flash_init(void)
466{
467 return ps3_system_bus_driver_register(&ps3flash);
468}
469
470static void __exit ps3flash_exit(void)
471{
472 ps3_system_bus_driver_unregister(&ps3flash);
473}
474
475module_init(ps3flash_init);
476module_exit(ps3flash_exit);
477
478MODULE_LICENSE("GPL");
479MODULE_DESCRIPTION("PS3 FLASH ROM Storage Driver");
480MODULE_AUTHOR("Sony Corporation");
481MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * PS3 FLASH ROM Storage Driver
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2007 Sony Corp.
7 */
8
9#include <linux/fs.h>
10#include <linux/miscdevice.h>
11#include <linux/slab.h>
12#include <linux/uaccess.h>
13#include <linux/module.h>
14
15#include <asm/lv1call.h>
16#include <asm/ps3stor.h>
17
18
19#define DEVICE_NAME "ps3flash"
20
21#define FLASH_BLOCK_SIZE (256*1024)
22
23
24struct ps3flash_private {
25 struct mutex mutex; /* Bounce buffer mutex */
26 u64 chunk_sectors;
27 int tag; /* Start sector of buffer, -1 if invalid */
28 bool dirty;
29};
30
31static struct ps3_storage_device *ps3flash_dev;
32
33static int ps3flash_read_write_sectors(struct ps3_storage_device *dev,
34 u64 start_sector, int write)
35{
36 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
37 u64 res = ps3stor_read_write_sectors(dev, dev->bounce_lpar,
38 start_sector, priv->chunk_sectors,
39 write);
40 if (res) {
41 dev_err(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
42 __LINE__, write ? "write" : "read", res);
43 return -EIO;
44 }
45 return 0;
46}
47
48static int ps3flash_writeback(struct ps3_storage_device *dev)
49{
50 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
51 int res;
52
53 if (!priv->dirty || priv->tag < 0)
54 return 0;
55
56 res = ps3flash_read_write_sectors(dev, priv->tag, 1);
57 if (res)
58 return res;
59
60 priv->dirty = false;
61 return 0;
62}
63
64static int ps3flash_fetch(struct ps3_storage_device *dev, u64 start_sector)
65{
66 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
67 int res;
68
69 if (start_sector == priv->tag)
70 return 0;
71
72 res = ps3flash_writeback(dev);
73 if (res)
74 return res;
75
76 priv->tag = -1;
77
78 res = ps3flash_read_write_sectors(dev, start_sector, 0);
79 if (res)
80 return res;
81
82 priv->tag = start_sector;
83 return 0;
84}
85
86static loff_t ps3flash_llseek(struct file *file, loff_t offset, int origin)
87{
88 struct ps3_storage_device *dev = ps3flash_dev;
89 return generic_file_llseek_size(file, offset, origin, MAX_LFS_FILESIZE,
90 dev->regions[dev->region_idx].size*dev->blk_size);
91}
92
93static ssize_t ps3flash_read(char __user *userbuf, void *kernelbuf,
94 size_t count, loff_t *pos)
95{
96 struct ps3_storage_device *dev = ps3flash_dev;
97 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
98 u64 size, sector, offset;
99 int res;
100 size_t remaining, n;
101 const void *src;
102
103 dev_dbg(&dev->sbd.core,
104 "%s:%u: Reading %zu bytes at position %lld to U0x%p/K0x%p\n",
105 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
106
107 size = dev->regions[dev->region_idx].size*dev->blk_size;
108 if (*pos >= size || !count)
109 return 0;
110
111 if (*pos + count > size) {
112 dev_dbg(&dev->sbd.core,
113 "%s:%u Truncating count from %zu to %llu\n", __func__,
114 __LINE__, count, size - *pos);
115 count = size - *pos;
116 }
117
118 sector = *pos / dev->bounce_size * priv->chunk_sectors;
119 offset = *pos % dev->bounce_size;
120
121 remaining = count;
122 do {
123 n = min_t(u64, remaining, dev->bounce_size - offset);
124 src = dev->bounce_buf + offset;
125
126 mutex_lock(&priv->mutex);
127
128 res = ps3flash_fetch(dev, sector);
129 if (res)
130 goto fail;
131
132 dev_dbg(&dev->sbd.core,
133 "%s:%u: copy %lu bytes from 0x%p to U0x%p/K0x%p\n",
134 __func__, __LINE__, n, src, userbuf, kernelbuf);
135 if (userbuf) {
136 if (copy_to_user(userbuf, src, n)) {
137 res = -EFAULT;
138 goto fail;
139 }
140 userbuf += n;
141 }
142 if (kernelbuf) {
143 memcpy(kernelbuf, src, n);
144 kernelbuf += n;
145 }
146
147 mutex_unlock(&priv->mutex);
148
149 *pos += n;
150 remaining -= n;
151 sector += priv->chunk_sectors;
152 offset = 0;
153 } while (remaining > 0);
154
155 return count;
156
157fail:
158 mutex_unlock(&priv->mutex);
159 return res;
160}
161
162static ssize_t ps3flash_write(const char __user *userbuf,
163 const void *kernelbuf, size_t count, loff_t *pos)
164{
165 struct ps3_storage_device *dev = ps3flash_dev;
166 struct ps3flash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
167 u64 size, sector, offset;
168 int res = 0;
169 size_t remaining, n;
170 void *dst;
171
172 dev_dbg(&dev->sbd.core,
173 "%s:%u: Writing %zu bytes at position %lld from U0x%p/K0x%p\n",
174 __func__, __LINE__, count, *pos, userbuf, kernelbuf);
175
176 size = dev->regions[dev->region_idx].size*dev->blk_size;
177 if (*pos >= size || !count)
178 return 0;
179
180 if (*pos + count > size) {
181 dev_dbg(&dev->sbd.core,
182 "%s:%u Truncating count from %zu to %llu\n", __func__,
183 __LINE__, count, size - *pos);
184 count = size - *pos;
185 }
186
187 sector = *pos / dev->bounce_size * priv->chunk_sectors;
188 offset = *pos % dev->bounce_size;
189
190 remaining = count;
191 do {
192 n = min_t(u64, remaining, dev->bounce_size - offset);
193 dst = dev->bounce_buf + offset;
194
195 mutex_lock(&priv->mutex);
196
197 if (n != dev->bounce_size)
198 res = ps3flash_fetch(dev, sector);
199 else if (sector != priv->tag)
200 res = ps3flash_writeback(dev);
201 if (res)
202 goto fail;
203
204 dev_dbg(&dev->sbd.core,
205 "%s:%u: copy %lu bytes from U0x%p/K0x%p to 0x%p\n",
206 __func__, __LINE__, n, userbuf, kernelbuf, dst);
207 if (userbuf) {
208 if (copy_from_user(dst, userbuf, n)) {
209 res = -EFAULT;
210 goto fail;
211 }
212 userbuf += n;
213 }
214 if (kernelbuf) {
215 memcpy(dst, kernelbuf, n);
216 kernelbuf += n;
217 }
218
219 priv->tag = sector;
220 priv->dirty = true;
221
222 mutex_unlock(&priv->mutex);
223
224 *pos += n;
225 remaining -= n;
226 sector += priv->chunk_sectors;
227 offset = 0;
228 } while (remaining > 0);
229
230 return count;
231
232fail:
233 mutex_unlock(&priv->mutex);
234 return res;
235}
236
237static ssize_t ps3flash_user_read(struct file *file, char __user *buf,
238 size_t count, loff_t *pos)
239{
240 return ps3flash_read(buf, NULL, count, pos);
241}
242
243static ssize_t ps3flash_user_write(struct file *file, const char __user *buf,
244 size_t count, loff_t *pos)
245{
246 return ps3flash_write(buf, NULL, count, pos);
247}
248
249static ssize_t ps3flash_kernel_read(void *buf, size_t count, loff_t pos)
250{
251 return ps3flash_read(NULL, buf, count, &pos);
252}
253
254static ssize_t ps3flash_kernel_write(const void *buf, size_t count,
255 loff_t pos)
256{
257 ssize_t res;
258 int wb;
259
260 res = ps3flash_write(NULL, buf, count, &pos);
261 if (res < 0)
262 return res;
263
264 /* Make kernel writes synchronous */
265 wb = ps3flash_writeback(ps3flash_dev);
266 if (wb)
267 return wb;
268
269 return res;
270}
271
272static int ps3flash_flush(struct file *file, fl_owner_t id)
273{
274 return ps3flash_writeback(ps3flash_dev);
275}
276
277static int ps3flash_fsync(struct file *file, loff_t start, loff_t end, int datasync)
278{
279 struct inode *inode = file_inode(file);
280 int err;
281 inode_lock(inode);
282 err = ps3flash_writeback(ps3flash_dev);
283 inode_unlock(inode);
284 return err;
285}
286
287static irqreturn_t ps3flash_interrupt(int irq, void *data)
288{
289 struct ps3_storage_device *dev = data;
290 int res;
291 u64 tag, status;
292
293 res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
294
295 if (tag != dev->tag)
296 dev_err(&dev->sbd.core,
297 "%s:%u: tag mismatch, got %llx, expected %llx\n",
298 __func__, __LINE__, tag, dev->tag);
299
300 if (res) {
301 dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
302 __func__, __LINE__, res, status);
303 } else {
304 dev->lv1_status = status;
305 complete(&dev->done);
306 }
307 return IRQ_HANDLED;
308}
309
310static const struct file_operations ps3flash_fops = {
311 .owner = THIS_MODULE,
312 .llseek = ps3flash_llseek,
313 .read = ps3flash_user_read,
314 .write = ps3flash_user_write,
315 .flush = ps3flash_flush,
316 .fsync = ps3flash_fsync,
317};
318
319static const struct ps3_os_area_flash_ops ps3flash_kernel_ops = {
320 .read = ps3flash_kernel_read,
321 .write = ps3flash_kernel_write,
322};
323
324static struct miscdevice ps3flash_misc = {
325 .minor = MISC_DYNAMIC_MINOR,
326 .name = DEVICE_NAME,
327 .fops = &ps3flash_fops,
328};
329
330static int ps3flash_probe(struct ps3_system_bus_device *_dev)
331{
332 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
333 struct ps3flash_private *priv;
334 int error;
335 unsigned long tmp;
336
337 tmp = dev->regions[dev->region_idx].start*dev->blk_size;
338 if (tmp % FLASH_BLOCK_SIZE) {
339 dev_err(&dev->sbd.core,
340 "%s:%u region start %lu is not aligned\n", __func__,
341 __LINE__, tmp);
342 return -EINVAL;
343 }
344 tmp = dev->regions[dev->region_idx].size*dev->blk_size;
345 if (tmp % FLASH_BLOCK_SIZE) {
346 dev_err(&dev->sbd.core,
347 "%s:%u region size %lu is not aligned\n", __func__,
348 __LINE__, tmp);
349 return -EINVAL;
350 }
351
352 /* use static buffer, kmalloc cannot allocate 256 KiB */
353 if (!ps3flash_bounce_buffer.address)
354 return -ENODEV;
355
356 if (ps3flash_dev) {
357 dev_err(&dev->sbd.core,
358 "Only one FLASH device is supported\n");
359 return -EBUSY;
360 }
361
362 ps3flash_dev = dev;
363
364 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
365 if (!priv) {
366 error = -ENOMEM;
367 goto fail;
368 }
369
370 ps3_system_bus_set_drvdata(&dev->sbd, priv);
371 mutex_init(&priv->mutex);
372 priv->tag = -1;
373
374 dev->bounce_size = ps3flash_bounce_buffer.size;
375 dev->bounce_buf = ps3flash_bounce_buffer.address;
376 priv->chunk_sectors = dev->bounce_size / dev->blk_size;
377
378 error = ps3stor_setup(dev, ps3flash_interrupt);
379 if (error)
380 goto fail_free_priv;
381
382 ps3flash_misc.parent = &dev->sbd.core;
383 error = misc_register(&ps3flash_misc);
384 if (error) {
385 dev_err(&dev->sbd.core, "%s:%u: misc_register failed %d\n",
386 __func__, __LINE__, error);
387 goto fail_teardown;
388 }
389
390 dev_info(&dev->sbd.core, "%s:%u: registered misc device %d\n",
391 __func__, __LINE__, ps3flash_misc.minor);
392
393 ps3_os_area_flash_register(&ps3flash_kernel_ops);
394 return 0;
395
396fail_teardown:
397 ps3stor_teardown(dev);
398fail_free_priv:
399 kfree(priv);
400 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
401fail:
402 ps3flash_dev = NULL;
403 return error;
404}
405
406static void ps3flash_remove(struct ps3_system_bus_device *_dev)
407{
408 struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
409
410 ps3_os_area_flash_register(NULL);
411 misc_deregister(&ps3flash_misc);
412 ps3stor_teardown(dev);
413 kfree(ps3_system_bus_get_drvdata(&dev->sbd));
414 ps3_system_bus_set_drvdata(&dev->sbd, NULL);
415 ps3flash_dev = NULL;
416}
417
418
419static struct ps3_system_bus_driver ps3flash = {
420 .match_id = PS3_MATCH_ID_STOR_FLASH,
421 .core.name = DEVICE_NAME,
422 .core.owner = THIS_MODULE,
423 .probe = ps3flash_probe,
424 .remove = ps3flash_remove,
425 .shutdown = ps3flash_remove,
426};
427
428
429static int __init ps3flash_init(void)
430{
431 return ps3_system_bus_driver_register(&ps3flash);
432}
433
434static void __exit ps3flash_exit(void)
435{
436 ps3_system_bus_driver_unregister(&ps3flash);
437}
438
439module_init(ps3flash_init);
440module_exit(ps3flash_exit);
441
442MODULE_LICENSE("GPL");
443MODULE_DESCRIPTION("PS3 FLASH ROM Storage Driver");
444MODULE_AUTHOR("Sony Corporation");
445MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);