/*
* NAND Flash Controller Device Driver
* Copyright (c) 2009, Intel Corporation and its suppliers.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include "ffsport.h"
#include "flash.h"
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
#include <linux/wait.h>
#include <linux/mutex.h>
#include <linux/kthread.h>
#include <linux/log2.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/async.h>
/**** Helper functions used for Div, Remainder operation on u64 ****/
/*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
* Function: GLOB_Calc_Used_Bits
* Inputs: Power of 2 number
* Outputs: Number of Used Bits
* 0, if the argument is 0
* Description: Calculate the number of bits used by a given power of 2 number
* Number can be up to 32 bit
*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
int GLOB_Calc_Used_Bits(u32 n)
{
int tot_bits = 0;
if (n >= 1 << 16) {
n >>= 16;
tot_bits += 16;
}
if (n >= 1 << 8) {
n >>= 8;
tot_bits += 8;
}
if (n >= 1 << 4) {
n >>= 4;
tot_bits += 4;
}
if (n >= 1 << 2) {
n >>= 2;
tot_bits += 2;
}
if (n >= 1 << 1)
tot_bits += 1;
return ((n == 0) ? (0) : tot_bits);
}
/*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
* Function: GLOB_u64_Div
* Inputs: Number of u64
* A power of 2 number as Division
* Outputs: Quotient of the Divisor operation
* Description: It divides the address by divisor by using bit shift operation
* (essentially without explicitely using "/").
* Divisor is a power of 2 number and Divided is of u64
*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
u64 GLOB_u64_Div(u64 addr, u32 divisor)
{
return (u64)(addr >> GLOB_Calc_Used_Bits(divisor));
}
/*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&
* Function: GLOB_u64_Remainder
* Inputs: Number of u64
* Divisor Type (1 -PageAddress, 2- BlockAddress)
* Outputs: Remainder of the Division operation
* Description: It calculates the remainder of a number (of u64) by
* divisor(power of 2 number ) by using bit shifting and multiply
* operation(essentially without explicitely using "/").
*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
u64 GLOB_u64_Remainder(u64 addr, u32 divisor_type)
{
u64 result = 0;
if (divisor_type == 1) { /* Remainder -- Page */
result = (addr >> DeviceInfo.nBitsInPageDataSize);
result = result * DeviceInfo.wPageDataSize;
} else if (divisor_type == 2) { /* Remainder -- Block */
result = (addr >> DeviceInfo.nBitsInBlockDataSize);
result = result * DeviceInfo.wBlockDataSize;
}
result = addr - result;
return result;
}
#define NUM_DEVICES 1
#define PARTITIONS 8
#define GLOB_SBD_NAME "nd"
#define GLOB_SBD_IRQ_NUM (29)
#define GLOB_SBD_IOCTL_GC (0x7701)
#define GLOB_SBD_IOCTL_WL (0x7702)
#define GLOB_SBD_IOCTL_FORMAT (0x7703)
#define GLOB_SBD_IOCTL_ERASE_FLASH (0x7704)
#define GLOB_SBD_IOCTL_FLUSH_CACHE (0x7705)
#define GLOB_SBD_IOCTL_COPY_BLK_TABLE (0x7706)
#define GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE (0x7707)
#define GLOB_SBD_IOCTL_GET_NAND_INFO (0x7708)
#define GLOB_SBD_IOCTL_WRITE_DATA (0x7709)
#define GLOB_SBD_IOCTL_READ_DATA (0x770A)
static int reserved_mb = 0;
module_param(reserved_mb, int, 0);
MODULE_PARM_DESC(reserved_mb, "Reserved space for OS image, in MiB (default 25 MiB)");
int nand_debug_level;
module_param(nand_debug_level, int, 0644);
MODULE_PARM_DESC(nand_debug_level, "debug level value: 1-3");
MODULE_LICENSE("GPL");
struct spectra_nand_dev {
struct pci_dev *dev;
u64 size;
u16 users;
spinlock_t qlock;
void __iomem *ioaddr; /* Mapped address */
struct request_queue *queue;
struct task_struct *thread;
struct gendisk *gd;
u8 *tmp_buf;
};
static int GLOB_SBD_majornum;
static char *GLOB_version = GLOB_VERSION;
static struct spectra_nand_dev nand_device[NUM_DEVICES];
static struct mutex spectra_lock;
static int res_blks_os = 1;
struct spectra_indentfy_dev_tag IdentifyDeviceData;
static int force_flush_cache(void)
{
nand_dbg_print(NAND_DBG_DEBUG, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
if (ERR == GLOB_FTL_Flush_Cache()) {
printk(KERN_ERR "Fail to Flush FTL Cache!\n");
return -EFAULT;
}
#if CMD_DMA
if (glob_ftl_execute_cmds())
return -EIO;
else
return 0;
#endif
return 0;
}
struct ioctl_rw_page_info {
u8 *data;
unsigned int page;
};
static int ioctl_read_page_data(unsigned long arg)
{
u8 *buf;
struct ioctl_rw_page_info info;
int result = PASS;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
return -EFAULT;
buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC);
if (!buf) {
printk(KERN_ERR "ioctl_read_page_data: "
"failed to allocate memory\n");
return -ENOMEM;
}
mutex_lock(&spectra_lock);
result = GLOB_FTL_Page_Read(buf,
(u64)info.page * IdentifyDeviceData.PageDataSize);
mutex_unlock(&spectra_lock);
if (copy_to_user((void __user *)info.data, buf,
IdentifyDeviceData.PageDataSize)) {
printk(KERN_ERR "ioctl_read_page_data: "
"failed to copy user data\n");
kfree(buf);
return -EFAULT;
}
kfree(buf);
return result;
}
static int ioctl_write_page_data(unsigned long arg)
{
u8 *buf;
struct ioctl_rw_page_info info;
int result = PASS;
if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
return -EFAULT;
buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC);
if (!buf) {
printk(KERN_ERR "ioctl_write_page_data: "
"failed to allocate memory\n");
return -ENOMEM;
}
if (copy_from_user(buf, (void __user *)info.data,
IdentifyDeviceData.PageDataSize)) {
printk(KERN_ERR "ioctl_write_page_data: "
"failed to copy user data\n");
kfree(buf);
return -EFAULT;
}
mutex_lock(&spectra_lock);
result = GLOB_FTL_Page_Write(buf,
(u64)info.page * IdentifyDeviceData.PageDataSize);
mutex_unlock(&spectra_lock);
kfree(buf);
return result;
}
/* Return how many blocks should be reserved for bad block replacement */
static int get_res_blk_num_bad_blk(void)
{
return IdentifyDeviceData.wDataBlockNum / 10;
}
/* Return how many blocks should be reserved for OS image */
static int get_res_blk_num_os(void)
{
u32 res_blks, blk_size;
blk_size = IdentifyDeviceData.PageDataSize *
IdentifyDeviceData.PagesPerBlock;
res_blks = (reserved_mb * 1024 * 1024) / blk_size;
if ((res_blks < 1) || (res_blks >= IdentifyDeviceData.wDataBlockNum))
res_blks = 1; /* Reserved 1 block for block table */
return res_blks;
}
/* Transfer a full request. */
static int do_transfer(struct spectra_nand_dev *tr, struct request *req)
{
u64 start_addr, addr;
u32 logical_start_sect, hd_start_sect;
u32 nsect, hd_sects;
u32 rsect, tsect = 0;
char *buf;
u32 ratio = IdentifyDeviceData.PageDataSize >> 9;
start_addr = (u64)(blk_rq_pos(req)) << 9;
/* Add a big enough offset to prevent the OS Image from
* being accessed or damaged by file system */
start_addr += IdentifyDeviceData.PageDataSize *
IdentifyDeviceData.PagesPerBlock *
res_blks_os;
if (req->cmd_type & REQ_FLUSH) {
if (force_flush_cache()) /* Fail to flush cache */
return -EIO;
else
return 0;
}
if (req->cmd_type != REQ_TYPE_FS)
return -EIO;
if (blk_rq_pos(req) + blk_rq_cur_sectors(req) > get_capacity(tr->gd)) {
printk(KERN_ERR "Spectra error: request over the NAND "
"capacity!sector %d, current_nr_sectors %d, "
"while capacity is %d\n",
(int)blk_rq_pos(req),
blk_rq_cur_sectors(req),
(int)get_capacity(tr->gd));
return -EIO;
}
logical_start_sect = start_addr >> 9;
hd_start_sect = logical_start_sect / ratio;
rsect = logical_start_sect - hd_start_sect * ratio;
addr = (u64)hd_start_sect * ratio * 512;
buf = req->buffer;
nsect = blk_rq_cur_sectors(req);
if (rsect)
tsect = (ratio - rsect) < nsect ? (ratio - rsect) : nsect;
switch (rq_data_dir(req)) {
case READ:
/* Read the first NAND page */
if (rsect) {
if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
memcpy(buf, tr->tmp_buf + (rsect << 9), tsect << 9);
addr += IdentifyDeviceData.PageDataSize;
buf += tsect << 9;
nsect -= tsect;
}
/* Read the other NAND pages */
for (hd_sects = nsect / ratio; hd_sects > 0; hd_sects--) {
if (GLOB_FTL_Page_Read(buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
addr += IdentifyDeviceData.PageDataSize;
buf += IdentifyDeviceData.PageDataSize;
}
/* Read the last NAND pages */
if (nsect % ratio) {
if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
memcpy(buf, tr->tmp_buf, (nsect % ratio) << 9);
}
#if CMD_DMA
if (glob_ftl_execute_cmds())
return -EIO;
else
return 0;
#endif
return 0;
case WRITE:
/* Write the first NAND page */
if (rsect) {
if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
memcpy(tr->tmp_buf + (rsect << 9), buf, tsect << 9);
if (GLOB_FTL_Page_Write(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
addr += IdentifyDeviceData.PageDataSize;
buf += tsect << 9;
nsect -= tsect;
}
/* Write the other NAND pages */
for (hd_sects = nsect / ratio; hd_sects > 0; hd_sects--) {
if (GLOB_FTL_Page_Write(buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
addr += IdentifyDeviceData.PageDataSize;
buf += IdentifyDeviceData.PageDataSize;
}
/* Write the last NAND pages */
if (nsect % ratio) {
if (GLOB_FTL_Page_Read(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
memcpy(tr->tmp_buf, buf, (nsect % ratio) << 9);
if (GLOB_FTL_Page_Write(tr->tmp_buf, addr)) {
printk(KERN_ERR "Error in %s, Line %d\n",
__FILE__, __LINE__);
return -EIO;
}
}
#if CMD_DMA
if (glob_ftl_execute_cmds())
return -EIO;
else
return 0;
#endif
return 0;
default:
printk(KERN_NOTICE "Unknown request %u\n", rq_data_dir(req));
return -EIO;
}
}
/* This function is copied from drivers/mtd/mtd_blkdevs.c */
static int spectra_trans_thread(void *arg)
{
struct spectra_nand_dev *tr = arg;
struct request_queue *rq = tr->queue;
struct request *req = NULL;
/* we might get involved when memory gets low, so use PF_MEMALLOC */
current->flags |= PF_MEMALLOC;
spin_lock_irq(rq->queue_lock);
while (!kthread_should_stop()) {
int res;
if (!req) {
req = blk_fetch_request(rq);
if (!req) {
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_irq(rq->queue_lock);
schedule();
spin_lock_irq(rq->queue_lock);
continue;
}
}
spin_unlock_irq(rq->queue_lock);
mutex_lock(&spectra_lock);
res = do_transfer(tr, req);
mutex_unlock(&spectra_lock);
spin_lock_irq(rq->queue_lock);
if (!__blk_end_request_cur(req, res))
req = NULL;
}
if (req)
__blk_end_request_all(req, -EIO);
spin_unlock_irq(rq->queue_lock);
return 0;
}
/* Request function that "handles clustering". */
static void GLOB_SBD_request(struct request_queue *rq)
{
struct spectra_nand_dev *pdev = rq->queuedata;
wake_up_process(pdev->thread);
}
static int GLOB_SBD_open(struct block_device *bdev, fmode_t mode)
{
nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
return 0;
}
static int GLOB_SBD_release(struct gendisk *disk, fmode_t mode)
{
int ret;
nand_dbg_print(NAND_DBG_WARN, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
mutex_lock(&spectra_lock);
ret = force_flush_cache();
mutex_unlock(&spectra_lock);
return 0;
}
static int GLOB_SBD_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
geo->heads = 4;
geo->sectors = 16;
geo->cylinders = get_capacity(bdev->bd_disk) / (4 * 16);
nand_dbg_print(NAND_DBG_DEBUG,
"heads: %d, sectors: %d, cylinders: %d\n",
geo->heads, geo->sectors, geo->cylinders);
return 0;
}
int GLOB_SBD_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
int ret;
nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
switch (cmd) {
case GLOB_SBD_IOCTL_GC:
nand_dbg_print(NAND_DBG_DEBUG,
"Spectra IOCTL: Garbage Collection "
"being performed\n");
if (PASS != GLOB_FTL_Garbage_Collection())
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_WL:
nand_dbg_print(NAND_DBG_DEBUG,
"Spectra IOCTL: Static Wear Leveling "
"being performed\n");
if (PASS != GLOB_FTL_Wear_Leveling())
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_FORMAT:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: Flash format "
"being performed\n");
if (PASS != GLOB_FTL_Flash_Format())
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_FLUSH_CACHE:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: Cache flush "
"being performed\n");
mutex_lock(&spectra_lock);
ret = force_flush_cache();
mutex_unlock(&spectra_lock);
return ret;
case GLOB_SBD_IOCTL_COPY_BLK_TABLE:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: "
"Copy block table\n");
if (copy_to_user((void __user *)arg,
get_blk_table_start_addr(),
get_blk_table_len()))
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_COPY_WEAR_LEVELING_TABLE:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: "
"Copy wear leveling table\n");
if (copy_to_user((void __user *)arg,
get_wear_leveling_table_start_addr(),
get_wear_leveling_table_len()))
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_GET_NAND_INFO:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: "
"Get NAND info\n");
if (copy_to_user((void __user *)arg, &IdentifyDeviceData,
sizeof(IdentifyDeviceData)))
return -EFAULT;
return 0;
case GLOB_SBD_IOCTL_WRITE_DATA:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: "
"Write one page data\n");
return ioctl_write_page_data(arg);
case GLOB_SBD_IOCTL_READ_DATA:
nand_dbg_print(NAND_DBG_DEBUG, "Spectra IOCTL: "
"Read one page data\n");
return ioctl_read_page_data(arg);
}
return -ENOTTY;
}
static DEFINE_MUTEX(ffsport_mutex);
int GLOB_SBD_unlocked_ioctl(struct block_device *bdev, fmode_t mode,
unsigned int cmd, unsigned long arg)
{
int ret;
mutex_lock(&ffsport_mutex);
ret = GLOB_SBD_ioctl(bdev, mode, cmd, arg);
mutex_unlock(&ffsport_mutex);
return ret;
}
static struct block_device_operations GLOB_SBD_ops = {
.owner = THIS_MODULE,
.open = GLOB_SBD_open,
.release = GLOB_SBD_release,
.ioctl = GLOB_SBD_unlocked_ioctl,
.getgeo = GLOB_SBD_getgeo,
};
static int SBD_setup_device(struct spectra_nand_dev *dev, int which)
{
int res_blks;
u32 sects;
nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
memset(dev, 0, sizeof(struct spectra_nand_dev));
nand_dbg_print(NAND_DBG_WARN, "Reserved %d blocks "
"for OS image, %d blocks for bad block replacement.\n",
get_res_blk_num_os(),
get_res_blk_num_bad_blk());
res_blks = get_res_blk_num_bad_blk() + get_res_blk_num_os();
dev->size = (u64)IdentifyDeviceData.PageDataSize *
IdentifyDeviceData.PagesPerBlock *
(IdentifyDeviceData.wDataBlockNum - res_blks);
res_blks_os = get_res_blk_num_os();
spin_lock_init(&dev->qlock);
dev->tmp_buf = kmalloc(IdentifyDeviceData.PageDataSize, GFP_ATOMIC);
if (!dev->tmp_buf) {
printk(KERN_ERR "Failed to kmalloc memory in %s Line %d, exit.\n",
__FILE__, __LINE__);
goto out_vfree;
}
dev->queue = blk_init_queue(GLOB_SBD_request, &dev->qlock);
if (dev->queue == NULL) {
printk(KERN_ERR
"Spectra: Request queue could not be initialized."
" Aborting\n ");
goto out_vfree;
}
dev->queue->queuedata = dev;
/* As Linux block layer doesn't support >4KB hardware sector, */
/* Here we force report 512 byte hardware sector size to Kernel */
blk_queue_logical_block_size(dev->queue, 512);
blk_queue_flush(dev->queue, REQ_FLUSH);
dev->thread = kthread_run(spectra_trans_thread, dev, "nand_thd");
if (IS_ERR(dev->thread)) {
blk_cleanup_queue(dev->queue);
unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
return PTR_ERR(dev->thread);
}
dev->gd = alloc_disk(PARTITIONS);
if (!dev->gd) {
printk(KERN_ERR
"Spectra: Could not allocate disk. Aborting \n ");
goto out_vfree;
}
dev->gd->major = GLOB_SBD_majornum;
dev->gd->first_minor = which * PARTITIONS;
dev->gd->fops = &GLOB_SBD_ops;
dev->gd->queue = dev->queue;
dev->gd->private_data = dev;
snprintf(dev->gd->disk_name, 32, "%s%c", GLOB_SBD_NAME, which + 'a');
sects = dev->size >> 9;
nand_dbg_print(NAND_DBG_WARN, "Capacity sects: %d\n", sects);
set_capacity(dev->gd, sects);
add_disk(dev->gd);
return 0;
out_vfree:
return -ENOMEM;
}
/*
static ssize_t show_nand_block_num(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n",
(int)IdentifyDeviceData.wDataBlockNum);
}
static ssize_t show_nand_pages_per_block(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n",
(int)IdentifyDeviceData.PagesPerBlock);
}
static ssize_t show_nand_page_size(struct device *dev,
struct device_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n",
(int)IdentifyDeviceData.PageDataSize);
}
static DEVICE_ATTR(nand_block_num, 0444, show_nand_block_num, NULL);
static DEVICE_ATTR(nand_pages_per_block, 0444, show_nand_pages_per_block, NULL);
static DEVICE_ATTR(nand_page_size, 0444, show_nand_page_size, NULL);
static void create_sysfs_entry(struct device *dev)
{
if (device_create_file(dev, &dev_attr_nand_block_num))
printk(KERN_ERR "Spectra: "
"failed to create sysfs entry nand_block_num.\n");
if (device_create_file(dev, &dev_attr_nand_pages_per_block))
printk(KERN_ERR "Spectra: "
"failed to create sysfs entry nand_pages_per_block.\n");
if (device_create_file(dev, &dev_attr_nand_page_size))
printk(KERN_ERR "Spectra: "
"failed to create sysfs entry nand_page_size.\n");
}
*/
static void register_spectra_ftl_async(void *unused, async_cookie_t cookie)
{
int i;
/* create_sysfs_entry(&dev->dev); */
if (PASS != GLOB_FTL_IdentifyDevice(&IdentifyDeviceData)) {
printk(KERN_ERR "Spectra: Unable to Read Flash Device. "
"Aborting\n");
return;
} else {
nand_dbg_print(NAND_DBG_WARN, "In GLOB_SBD_init: "
"Num blocks=%d, pagesperblock=%d, "
"pagedatasize=%d, ECCBytesPerSector=%d\n",
(int)IdentifyDeviceData.NumBlocks,
(int)IdentifyDeviceData.PagesPerBlock,
(int)IdentifyDeviceData.PageDataSize,
(int)IdentifyDeviceData.wECCBytesPerSector);
}
printk(KERN_ALERT "Spectra: searching block table, please wait ...\n");
if (GLOB_FTL_Init() != PASS) {
printk(KERN_ERR "Spectra: Unable to Initialize FTL Layer. "
"Aborting\n");
goto out_ftl_flash_register;
}
printk(KERN_ALERT "Spectra: block table has been found.\n");
GLOB_SBD_majornum = register_blkdev(0, GLOB_SBD_NAME);
if (GLOB_SBD_majornum <= 0) {
printk(KERN_ERR "Unable to get the major %d for Spectra",
GLOB_SBD_majornum);
goto out_ftl_flash_register;
}
for (i = 0; i < NUM_DEVICES; i++)
if (SBD_setup_device(&nand_device[i], i) == -ENOMEM)
goto out_blk_register;
nand_dbg_print(NAND_DBG_DEBUG,
"Spectra: module loaded with major number %d\n",
GLOB_SBD_majornum);
return;
out_blk_register:
unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
out_ftl_flash_register:
GLOB_FTL_Cache_Release();
printk(KERN_ERR "Spectra: Module load failed.\n");
}
int register_spectra_ftl()
{
async_schedule(register_spectra_ftl_async, NULL);
return 0;
}
EXPORT_SYMBOL_GPL(register_spectra_ftl);
static int GLOB_SBD_init(void)
{
/* Set debug output level (0~3) here. 3 is most verbose */
printk(KERN_ALERT "Spectra: %s\n", GLOB_version);
mutex_init(&spectra_lock);
if (PASS != GLOB_FTL_Flash_Init()) {
printk(KERN_ERR "Spectra: Unable to Initialize Flash Device. "
"Aborting\n");
return -ENODEV;
}
return 0;
}
static void __exit GLOB_SBD_exit(void)
{
int i;
nand_dbg_print(NAND_DBG_TRACE, "%s, Line %d, Function: %s\n",
__FILE__, __LINE__, __func__);
for (i = 0; i < NUM_DEVICES; i++) {
struct spectra_nand_dev *dev = &nand_device[i];
if (dev->gd) {
del_gendisk(dev->gd);
put_disk(dev->gd);
}
if (dev->queue)
blk_cleanup_queue(dev->queue);
kfree(dev->tmp_buf);
}
unregister_blkdev(GLOB_SBD_majornum, GLOB_SBD_NAME);
mutex_lock(&spectra_lock);
force_flush_cache();
mutex_unlock(&spectra_lock);
GLOB_FTL_Cache_Release();
GLOB_FTL_Flash_Release();
nand_dbg_print(NAND_DBG_DEBUG,
"Spectra FTL module (major number %d) unloaded.\n",
GLOB_SBD_majornum);
}
module_init(GLOB_SBD_init);
module_exit(GLOB_SBD_exit);