/drivers/staging/spectra/ffsport.c
https://bitbucket.org/slukk/jb-tsm-kernel-4.2 · C · 841 lines · 596 code · 143 blank · 102 comment · 79 complexity · 3307cc7fcd2adb86168d20b2724f35dc MD5 · raw file
- /*
- * 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);