2 * NAND Flash Controller Device Driver
3 * Copyright (c) 2009, Intel Corporation and its suppliers.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
22 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/blkdev.h>
25 #include <linux/wait.h>
26 #include <linux/mutex.h>
27 #include <linux/kthread.h>
28 #include <linux/log2.h>
29 #include <linux/init.h>
31 /**** Helper functions used for Div, Remainder operation on u64 ****/
33 /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
34 * Function: GLOB_Calc_Used_Bits
35 * Inputs: Power of 2 number
36 * Outputs: Number of Used Bits
37 * 0, if the argument is 0
38 * Description: Calculate the number of bits used by a given power of 2 number
39 * Number can be upto 32 bit
40 *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
41 int GLOB_Calc_Used_Bits(u32 n
)
68 return ((n
== 0) ? (0) : tot_bits
);
71 /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
72 * Function: GLOB_u64_Div
73 * Inputs: Number of u64
74 * A power of 2 number as Division
75 * Outputs: Quotient of the Divisor operation
76 * Description: It divides the address by divisor by using bit shift operation
77 * (essentially without explicitely using "/").
78 * Divisor is a power of 2 number and Divided is of u64
79 *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
80 u64
GLOB_u64_Div(u64 addr
, u32 divisor
)
82 return (u64
)(addr
>> GLOB_Calc_Used_Bits(divisor
));
85 /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
86 * Function: GLOB_u64_Remainder
87 * Inputs: Number of u64
88 * Divisor Type (1 -PageAddress, 2- BlockAddress)
89 * Outputs: Remainder of the Division operation
90 * Description: It calculates the remainder of a number (of u64) by
91 * divisor(power of 2 number ) by using bit shifting and multiply
92 * operation(essentially without explicitely using "/").
93 *&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
94 u64
GLOB_u64_Remainder(u64 addr
, u32 divisor_type
)
98 if (divisor_type
== 1) { /* Remainder -- Page */
99 result
= (addr
>> DeviceInfo
.nBitsInPageDataSize
);
100 result
= result
* DeviceInfo
.wPageDataSize
;
101 } else if (divisor_type
== 2) { /* Remainder -- Block */
102 result
= (addr
>> DeviceInfo
.nBitsInBlockDataSize
);
103 result
= result
* DeviceInfo
.wBlockDataSize
;
106 result
= addr
- result
;
111 #define NUM_DEVICES 1
114 #define GLOB_SBD_NAME "nd"
115 #define GLOB_SBD_IRQ_NUM (29)
116 #define GLOB_VERSION "driver version 20091110"
118 #define GLOB_SBD_IOCTL_GC (0x7701)
119 #define GLOB_SBD_IOCTL_WL (0x7702)
120 #define GLOB_SBD_IOCTL_FORMAT (0x7703)
121 #define GLOB_SBD_IOCTL_ERASE_FLASH (0x7704)
122 #define GLOB_SBD_IOCTL_FLUSH_CACHE (0x7705)
123 #define GLOB_SBD_IOCTL_COPY_BLK_TABLE (0x7706)
124 #define GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE (0x7707)
125 #define GLOB_SBD_IOCTL_GET_NAND_INFO (0x7708)
126 #define GLOB_SBD_IOCTL_WRITE_DATA (0x7709)
127 #define GLOB_SBD_IOCTL_READ_DATA (0x770A)
129 static int reserved_mb
= 0;
130 module_param(reserved_mb
, int, 0);
131 MODULE_PARM_DESC(reserved_mb
, "Reserved space for OS image, in MiB (default 25 MiB)");
133 int nand_debug_level
;
134 module_param(nand_debug_level
, int, 0644);
135 MODULE_PARM_DESC(nand_debug_level
, "debug level value: 1-3");
137 MODULE_LICENSE("GPL");
139 struct spectra_nand_dev
{
144 void __iomem
*ioaddr
; /* Mapped address */
145 struct request_queue
*queue
;
146 struct task_struct
*thread
;
152 static int GLOB_SBD_majornum
;
154 static char *GLOB_version
= GLOB_VERSION
;
156 static struct spectra_nand_dev nand_device
[NUM_DEVICES
];
158 static struct mutex spectra_lock
;
160 static int res_blks_os
= 1;
162 struct spectra_indentfy_dev_tag IdentifyDeviceData
;
164 static int force_flush_cache(void)
166 nand_dbg_print(NAND_DBG_DEBUG
, "%s, Line %d, Function: %s\n",
167 __FILE__
, __LINE__
, __func__
);
169 if (ERR
== GLOB_FTL_Flush_Cache()) {
170 printk(KERN_ERR
"Fail to Flush FTL Cache!\n");
174 if (glob_ftl_execute_cmds())
182 struct ioctl_rw_page_info
{
187 static int ioctl_read_page_data(unsigned long arg
)
190 struct ioctl_rw_page_info info
;
193 if (copy_from_user(&info
, (void __user
*)arg
, sizeof(info
)))
196 buf
= kmalloc(IdentifyDeviceData
.PageDataSize
, GFP_ATOMIC
);
198 printk(KERN_ERR
"ioctl_read_page_data: "
199 "failed to allocate memory\n");
203 mutex_lock(&spectra_lock
);
204 result
= GLOB_FTL_Page_Read(buf
,
205 (u64
)info
.page
* IdentifyDeviceData
.PageDataSize
);
206 mutex_unlock(&spectra_lock
);
208 if (copy_to_user((void __user
*)info
.data
, buf
,
209 IdentifyDeviceData
.PageDataSize
)) {
210 printk(KERN_ERR
"ioctl_read_page_data: "
211 "failed to copy user data\n");
220 static int ioctl_write_page_data(unsigned long arg
)
223 struct ioctl_rw_page_info info
;
226 if (copy_from_user(&info
, (void __user
*)arg
, sizeof(info
)))
229 buf
= kmalloc(IdentifyDeviceData
.PageDataSize
, GFP_ATOMIC
);
231 printk(KERN_ERR
"ioctl_write_page_data: "
232 "failed to allocate memory\n");
236 if (copy_from_user(buf
, (void __user
*)info
.data
,
237 IdentifyDeviceData
.PageDataSize
)) {
238 printk(KERN_ERR
"ioctl_write_page_data: "
239 "failed to copy user data\n");
244 mutex_lock(&spectra_lock
);
245 result
= GLOB_FTL_Page_Write(buf
,
246 (u64
)info
.page
* IdentifyDeviceData
.PageDataSize
);
247 mutex_unlock(&spectra_lock
);
253 /* Return how many blocks should be reserved for bad block replacement */
254 static int get_res_blk_num_bad_blk(void)
256 return IdentifyDeviceData
.wDataBlockNum
/ 10;
259 /* Return how many blocks should be reserved for OS image */
260 static int get_res_blk_num_os(void)
262 u32 res_blks
, blk_size
;
264 blk_size
= IdentifyDeviceData
.PageDataSize
*
265 IdentifyDeviceData
.PagesPerBlock
;
267 res_blks
= (reserved_mb
* 1024 * 1024) / blk_size
;
269 if ((res_blks
< 1) || (res_blks
>= IdentifyDeviceData
.wDataBlockNum
))
270 res_blks
= 1; /* Reserved 1 block for block table */
275 static void SBD_prepare_flush(struct request_queue
*q
, struct request
*rq
)
277 rq
->cmd_type
= REQ_TYPE_LINUX_BLOCK
;
278 /* rq->timeout = 5 * HZ; */
279 rq
->cmd
[0] = REQ_LB_OP_FLUSH
;
282 /* Transfer a full request. */
283 static int do_transfer(struct spectra_nand_dev
*tr
, struct request
*req
)
285 u64 start_addr
, addr
;
286 u32 logical_start_sect
, hd_start_sect
;
288 u32 rsect
, tsect
= 0;
290 u32 ratio
= IdentifyDeviceData
.PageDataSize
>> 9;
292 start_addr
= (u64
)(blk_rq_pos(req
)) << 9;
293 /* Add a big enough offset to prevent the OS Image from
294 * being accessed or damaged by file system */
295 start_addr
+= IdentifyDeviceData
.PageDataSize
*
296 IdentifyDeviceData
.PagesPerBlock
*
299 if (req
->cmd_type
== REQ_TYPE_LINUX_BLOCK
&&
300 req
->cmd
[0] == REQ_LB_OP_FLUSH
) {
301 if (force_flush_cache()) /* Fail to flush cache */
307 if (!blk_fs_request(req
))
310 if (blk_rq_pos(req
) + blk_rq_cur_sectors(req
) > get_capacity(tr
->gd
)) {
311 printk(KERN_ERR
"Spectra error: request over the NAND "
312 "capacity!sector %d, current_nr_sectors %d, "
313 "while capacity is %d\n",
314 (int)blk_rq_pos(req
),
315 blk_rq_cur_sectors(req
),
316 (int)get_capacity(tr
->gd
));
320 logical_start_sect
= start_addr
>> 9;
321 hd_start_sect
= logical_start_sect
/ ratio
;
322 rsect
= logical_start_sect
- hd_start_sect
* ratio
;
324 addr
= (u64
)hd_start_sect
* ratio
* 512;
326 nsect
= blk_rq_cur_sectors(req
);
329 tsect
= (ratio
- rsect
) < nsect
? (ratio
- rsect
) : nsect
;
331 switch (rq_data_dir(req
)) {
333 /* Read the first NAND page */
335 if (GLOB_FTL_Page_Read(tr
->tmp_buf
, addr
)) {
336 printk(KERN_ERR
"Error in %s, Line %d\n",
340 memcpy(buf
, tr
->tmp_buf
+ (rsect
<< 9), tsect
<< 9);
341 addr
+= IdentifyDeviceData
.PageDataSize
;
346 /* Read the other NAND pages */
347 for (hd_sects
= nsect
/ ratio
; hd_sects
> 0; hd_sects
--) {
348 if (GLOB_FTL_Page_Read(buf
, addr
)) {
349 printk(KERN_ERR
"Error in %s, Line %d\n",
353 addr
+= IdentifyDeviceData
.PageDataSize
;
354 buf
+= IdentifyDeviceData
.PageDataSize
;
357 /* Read the last NAND pages */
359 if (GLOB_FTL_Page_Read(tr
->tmp_buf
, addr
)) {
360 printk(KERN_ERR
"Error in %s, Line %d\n",
364 memcpy(buf
, tr
->tmp_buf
, (nsect
% ratio
) << 9);
367 if (glob_ftl_execute_cmds())
375 /* Write the first NAND page */
377 if (GLOB_FTL_Page_Read(tr
->tmp_buf
, addr
)) {
378 printk(KERN_ERR
"Error in %s, Line %d\n",
382 memcpy(tr
->tmp_buf
+ (rsect
<< 9), buf
, tsect
<< 9);
383 if (GLOB_FTL_Page_Write(tr
->tmp_buf
, addr
)) {
384 printk(KERN_ERR
"Error in %s, Line %d\n",
388 addr
+= IdentifyDeviceData
.PageDataSize
;
393 /* Write the other NAND pages */
394 for (hd_sects
= nsect
/ ratio
; hd_sects
> 0; hd_sects
--) {
395 if (GLOB_FTL_Page_Write(buf
, addr
)) {
396 printk(KERN_ERR
"Error in %s, Line %d\n",
400 addr
+= IdentifyDeviceData
.PageDataSize
;
401 buf
+= IdentifyDeviceData
.PageDataSize
;
404 /* Write the last NAND pages */
406 if (GLOB_FTL_Page_Read(tr
->tmp_buf
, addr
)) {
407 printk(KERN_ERR
"Error in %s, Line %d\n",
411 memcpy(tr
->tmp_buf
, buf
, (nsect
% ratio
) << 9);
412 if (GLOB_FTL_Page_Write(tr
->tmp_buf
, addr
)) {
413 printk(KERN_ERR
"Error in %s, Line %d\n",
419 if (glob_ftl_execute_cmds())
427 printk(KERN_NOTICE
"Unknown request %u\n", rq_data_dir(req
));
432 /* This function is copied from drivers/mtd/mtd_blkdevs.c */
433 static int spectra_trans_thread(void *arg
)
435 struct spectra_nand_dev
*tr
= arg
;
436 struct request_queue
*rq
= tr
->queue
;
437 struct request
*req
= NULL
;
439 /* we might get involved when memory gets low, so use PF_MEMALLOC */
440 current
->flags
|= PF_MEMALLOC
;
442 spin_lock_irq(rq
->queue_lock
);
443 while (!kthread_should_stop()) {
447 req
= blk_fetch_request(rq
);
449 set_current_state(TASK_INTERRUPTIBLE
);
450 spin_unlock_irq(rq
->queue_lock
);
452 spin_lock_irq(rq
->queue_lock
);
457 spin_unlock_irq(rq
->queue_lock
);
459 mutex_lock(&spectra_lock
);
460 res
= do_transfer(tr
, req
);
461 mutex_unlock(&spectra_lock
);
463 spin_lock_irq(rq
->queue_lock
);
465 if (!__blk_end_request_cur(req
, res
))
470 __blk_end_request_all(req
, -EIO
);
472 spin_unlock_irq(rq
->queue_lock
);
478 /* Request function that "handles clustering". */
479 static void GLOB_SBD_request(struct request_queue
*rq
)
481 struct spectra_nand_dev
*pdev
= rq
->queuedata
;
482 wake_up_process(pdev
->thread
);
485 static int GLOB_SBD_open(struct block_device
*bdev
, fmode_t mode
)
488 nand_dbg_print(NAND_DBG_WARN
, "%s, Line %d, Function: %s\n",
489 __FILE__
, __LINE__
, __func__
);
493 static int GLOB_SBD_release(struct gendisk
*disk
, fmode_t mode
)
497 nand_dbg_print(NAND_DBG_WARN
, "%s, Line %d, Function: %s\n",
498 __FILE__
, __LINE__
, __func__
);
500 mutex_lock(&spectra_lock
);
501 ret
= force_flush_cache();
502 mutex_unlock(&spectra_lock
);
507 static int GLOB_SBD_getgeo(struct block_device
*bdev
, struct hd_geometry
*geo
)
511 geo
->cylinders
= get_capacity(bdev
->bd_disk
) / (4 * 16);
513 nand_dbg_print(NAND_DBG_DEBUG
,
514 "heads: %d, sectors: %d, cylinders: %d\n",
515 geo
->heads
, geo
->sectors
, geo
->cylinders
);
520 int GLOB_SBD_ioctl(struct block_device
*bdev
, fmode_t mode
,
521 unsigned int cmd
, unsigned long arg
)
525 nand_dbg_print(NAND_DBG_TRACE
, "%s, Line %d, Function: %s\n",
526 __FILE__
, __LINE__
, __func__
);
529 case GLOB_SBD_IOCTL_GC
:
530 nand_dbg_print(NAND_DBG_DEBUG
,
531 "Spectra IOCTL: Garbage Collection "
532 "being performed\n");
533 if (PASS
!= GLOB_FTL_Garbage_Collection())
537 case GLOB_SBD_IOCTL_WL
:
538 nand_dbg_print(NAND_DBG_DEBUG
,
539 "Spectra IOCTL: Static Wear Leveling "
540 "being performed\n");
541 if (PASS
!= GLOB_FTL_Wear_Leveling())
545 case GLOB_SBD_IOCTL_FORMAT
:
546 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: Flash format "
547 "being performed\n");
548 if (PASS
!= GLOB_FTL_Flash_Format())
552 case GLOB_SBD_IOCTL_FLUSH_CACHE
:
553 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: Cache flush "
554 "being performed\n");
555 mutex_lock(&spectra_lock
);
556 ret
= force_flush_cache();
557 mutex_unlock(&spectra_lock
);
560 case GLOB_SBD_IOCTL_COPY_BLK_TABLE
:
561 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: "
562 "Copy block table\n");
563 if (copy_to_user((void __user
*)arg
,
564 get_blk_table_start_addr(),
565 get_blk_table_len()))
569 case GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE
:
570 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: "
571 "Copy wear leveling table\n");
572 if (copy_to_user((void __user
*)arg
,
573 get_wear_leveling_table_start_addr(),
574 get_wear_leveling_table_len()))
578 case GLOB_SBD_IOCTL_GET_NAND_INFO
:
579 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: "
581 if (copy_to_user((void __user
*)arg
, &IdentifyDeviceData
,
582 sizeof(IdentifyDeviceData
)))
586 case GLOB_SBD_IOCTL_WRITE_DATA
:
587 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: "
588 "Write one page data\n");
589 return ioctl_write_page_data(arg
);
591 case GLOB_SBD_IOCTL_READ_DATA
:
592 nand_dbg_print(NAND_DBG_DEBUG
, "Spectra IOCTL: "
593 "Read one page data\n");
594 return ioctl_read_page_data(arg
);
600 static struct block_device_operations GLOB_SBD_ops
= {
601 .owner
= THIS_MODULE
,
602 .open
= GLOB_SBD_open
,
603 .release
= GLOB_SBD_release
,
604 .locked_ioctl
= GLOB_SBD_ioctl
,
605 .getgeo
= GLOB_SBD_getgeo
,
608 static int SBD_setup_device(struct spectra_nand_dev
*dev
, int which
)
613 nand_dbg_print(NAND_DBG_TRACE
, "%s, Line %d, Function: %s\n",
614 __FILE__
, __LINE__
, __func__
);
616 memset(dev
, 0, sizeof(struct spectra_nand_dev
));
618 nand_dbg_print(NAND_DBG_WARN
, "Reserved %d blocks "
619 "for OS image, %d blocks for bad block replacement.\n",
620 get_res_blk_num_os(),
621 get_res_blk_num_bad_blk());
623 res_blks
= get_res_blk_num_bad_blk() + get_res_blk_num_os();
625 dev
->size
= (u64
)IdentifyDeviceData
.PageDataSize
*
626 IdentifyDeviceData
.PagesPerBlock
*
627 (IdentifyDeviceData
.wDataBlockNum
- res_blks
);
629 res_blks_os
= get_res_blk_num_os();
631 spin_lock_init(&dev
->qlock
);
633 dev
->tmp_buf
= kmalloc(IdentifyDeviceData
.PageDataSize
, GFP_ATOMIC
);
635 printk(KERN_ERR
"Failed to kmalloc memory in %s Line %d, exit.\n",
640 dev
->queue
= blk_init_queue(GLOB_SBD_request
, &dev
->qlock
);
641 if (dev
->queue
== NULL
) {
643 "Spectra: Request queue could not be initialized."
647 dev
->queue
->queuedata
= dev
;
649 /* As Linux block layer doens't support >4KB hardware sector, */
650 /* Here we force report 512 byte hardware sector size to Kernel */
651 blk_queue_logical_block_size(dev
->queue
, 512);
653 blk_queue_ordered(dev
->queue
, QUEUE_ORDERED_DRAIN_FLUSH
,
656 dev
->thread
= kthread_run(spectra_trans_thread
, dev
, "nand_thd");
657 if (IS_ERR(dev
->thread
)) {
658 blk_cleanup_queue(dev
->queue
);
659 unregister_blkdev(GLOB_SBD_majornum
, GLOB_SBD_NAME
);
660 return PTR_ERR(dev
->thread
);
663 dev
->gd
= alloc_disk(PARTITIONS
);
666 "Spectra: Could not allocate disk. Aborting \n ");
669 dev
->gd
->major
= GLOB_SBD_majornum
;
670 dev
->gd
->first_minor
= which
* PARTITIONS
;
671 dev
->gd
->fops
= &GLOB_SBD_ops
;
672 dev
->gd
->queue
= dev
->queue
;
673 dev
->gd
->private_data
= dev
;
674 snprintf(dev
->gd
->disk_name
, 32, "%s%c", GLOB_SBD_NAME
, which
+ 'a');
676 sects
= dev
->size
>> 9;
677 nand_dbg_print(NAND_DBG_WARN
, "Capacity sects: %d\n", sects
);
678 set_capacity(dev
->gd
, sects
);
688 static ssize_t show_nand_block_num(struct device *dev,
689 struct device_attribute *attr, char *buf)
691 return snprintf(buf, PAGE_SIZE, "%d\n",
692 (int)IdentifyDeviceData.wDataBlockNum);
695 static ssize_t show_nand_pages_per_block(struct device *dev,
696 struct device_attribute *attr, char *buf)
698 return snprintf(buf, PAGE_SIZE, "%d\n",
699 (int)IdentifyDeviceData.PagesPerBlock);
702 static ssize_t show_nand_page_size(struct device *dev,
703 struct device_attribute *attr, char *buf)
705 return snprintf(buf, PAGE_SIZE, "%d\n",
706 (int)IdentifyDeviceData.PageDataSize);
709 static DEVICE_ATTR(nand_block_num, 0444, show_nand_block_num, NULL);
710 static DEVICE_ATTR(nand_pages_per_block, 0444, show_nand_pages_per_block, NULL);
711 static DEVICE_ATTR(nand_page_size, 0444, show_nand_page_size, NULL);
713 static void create_sysfs_entry(struct device *dev)
715 if (device_create_file(dev, &dev_attr_nand_block_num))
716 printk(KERN_ERR "Spectra: "
717 "failed to create sysfs entry nand_block_num.\n");
718 if (device_create_file(dev, &dev_attr_nand_pages_per_block))
719 printk(KERN_ERR "Spectra: "
720 "failed to create sysfs entry nand_pages_per_block.\n");
721 if (device_create_file(dev, &dev_attr_nand_page_size))
722 printk(KERN_ERR "Spectra: "
723 "failed to create sysfs entry nand_page_size.\n");
727 static int GLOB_SBD_init(void)
731 /* Set debug output level (0~3) here. 3 is most verbose */
732 printk(KERN_ALERT
"Spectra: %s\n", GLOB_version
);
734 mutex_init(&spectra_lock
);
736 GLOB_SBD_majornum
= register_blkdev(0, GLOB_SBD_NAME
);
737 if (GLOB_SBD_majornum
<= 0) {
738 printk(KERN_ERR
"Unable to get the major %d for Spectra",
743 if (PASS
!= GLOB_FTL_Flash_Init()) {
744 printk(KERN_ERR
"Spectra: Unable to Initialize Flash Device. "
746 goto out_flash_register
;
749 /* create_sysfs_entry(&dev->dev); */
751 if (PASS
!= GLOB_FTL_IdentifyDevice(&IdentifyDeviceData
)) {
752 printk(KERN_ERR
"Spectra: Unable to Read Flash Device. "
754 goto out_flash_register
;
756 nand_dbg_print(NAND_DBG_WARN
, "In GLOB_SBD_init: "
757 "Num blocks=%d, pagesperblock=%d, "
758 "pagedatasize=%d, ECCBytesPerSector=%d\n",
759 (int)IdentifyDeviceData
.NumBlocks
,
760 (int)IdentifyDeviceData
.PagesPerBlock
,
761 (int)IdentifyDeviceData
.PageDataSize
,
762 (int)IdentifyDeviceData
.wECCBytesPerSector
);
765 printk(KERN_ALERT
"Spectra: searching block table, please wait ...\n");
766 if (GLOB_FTL_Init() != PASS
) {
767 printk(KERN_ERR
"Spectra: Unable to Initialize FTL Layer. "
769 goto out_ftl_flash_register
;
771 printk(KERN_ALERT
"Spectra: block table has been found.\n");
773 for (i
= 0; i
< NUM_DEVICES
; i
++)
774 if (SBD_setup_device(&nand_device
[i
], i
) == -ENOMEM
)
775 goto out_ftl_flash_register
;
777 nand_dbg_print(NAND_DBG_DEBUG
,
778 "Spectra: module loaded with major number %d\n",
783 out_ftl_flash_register
:
784 GLOB_FTL_Cache_Release();
786 GLOB_FTL_Flash_Release();
787 unregister_blkdev(GLOB_SBD_majornum
, GLOB_SBD_NAME
);
788 printk(KERN_ERR
"Spectra: Module load failed.\n");
793 static void __exit
GLOB_SBD_exit(void)
797 nand_dbg_print(NAND_DBG_TRACE
, "%s, Line %d, Function: %s\n",
798 __FILE__
, __LINE__
, __func__
);
800 for (i
= 0; i
< NUM_DEVICES
; i
++) {
801 struct spectra_nand_dev
*dev
= &nand_device
[i
];
803 del_gendisk(dev
->gd
);
807 blk_cleanup_queue(dev
->queue
);
811 unregister_blkdev(GLOB_SBD_majornum
, GLOB_SBD_NAME
);
813 mutex_lock(&spectra_lock
);
815 mutex_unlock(&spectra_lock
);
817 GLOB_FTL_Cache_Release();
819 GLOB_FTL_Flash_Release();
821 nand_dbg_print(NAND_DBG_DEBUG
,
822 "Spectra FTL module (major number %d) unloaded.\n",
826 module_init(GLOB_SBD_init
);
827 module_exit(GLOB_SBD_exit
);