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Merge git://git.infradead.org/mtd-2.6

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* git://git.infradead.org/mtd-2.6:
  [MTD] Whitespace cleanup in SSFDC driver.
  [MTD] SSFDC translation layer minor cleanup
  [MTD] Fix dependencies with CONFIG_MTD=m
This commit is contained in:
Linus Torvalds 2006-09-23 17:23:15 -07:00
commit 1ab9dd0902
2 changed files with 34 additions and 28 deletions
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4
drivers/mtd/Kconfig
View File

@ -101,7 +101,7 @@ config MTD_REDBOOT_PARTS_READONLY
config MTD_CMDLINE_PARTS
bool "Command line partition table parsing"
depends on MTD_PARTITIONS = "y"
depends on MTD_PARTITIONS = "y" && MTD = "y"
---help---
Allow generic configuration of the MTD partition tables via the kernel
command line. Multiple flash resources are supported for hardware where
@ -264,7 +264,7 @@ config RFD_FTL
http://www.gensw.com/pages/prod/bios/rfd.htm
config SSFDC
bool "NAND SSFDC (SmartMedia) read only translation layer"
tristate "NAND SSFDC (SmartMedia) read only translation layer"
depends on MTD
default n
help

58
drivers/mtd/ssfdc.c
View File

@ -10,7 +10,6 @@
* published by the Free Software Foundation.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
@ -29,7 +28,7 @@ struct ssfdcr_record {
int cis_block; /* block n. containing CIS/IDI */
int erase_size; /* phys_block_size */
unsigned short *logic_block_map; /* all zones (max 8192 phys blocks on
the 128MB) */
the 128MiB) */
int map_len; /* n. phys_blocks on the card */
};
@ -43,11 +42,11 @@ struct ssfdcr_record {
#define MAX_LOGIC_BLK_PER_ZONE 1000
#define MAX_PHYS_BLK_PER_ZONE 1024
#define KB(x) ( (x) * 1024L )
#define MB(x) ( KB(x) * 1024L )
#define KiB(x) ( (x) * 1024L )
#define MiB(x) ( KiB(x) * 1024L )
/** CHS Table
1MB 2MB 4MB 8MB 16MB 32MB 64MB 128MB
1MiB 2MiB 4MiB 8MiB 16MiB 32MiB 64MiB 128MiB
NCylinder 125 125 250 250 500 500 500 500
NHead 4 4 4 4 4 8 8 16
NSector 4 8 8 16 16 16 32 32
@ -64,14 +63,14 @@ typedef struct {
/* Must be ordered by size */
static const chs_entry_t chs_table[] = {
{ MB( 1), 125, 4, 4 },
{ MB( 2), 125, 4, 8 },
{ MB( 4), 250, 4, 8 },
{ MB( 8), 250, 4, 16 },
{ MB( 16), 500, 4, 16 },
{ MB( 32), 500, 8, 16 },
{ MB( 64), 500, 8, 32 },
{ MB(128), 500, 16, 32 },
{ MiB( 1), 125, 4, 4 },
{ MiB( 2), 125, 4, 8 },
{ MiB( 4), 250, 4, 8 },
{ MiB( 8), 250, 4, 16 },
{ MiB( 16), 500, 4, 16 },
{ MiB( 32), 500, 8, 16 },
{ MiB( 64), 500, 8, 32 },
{ MiB(128), 500, 16, 32 },
{ 0 },
};
@ -109,25 +108,30 @@ static int get_valid_cis_sector(struct mtd_info *mtd)
int ret, k, cis_sector;
size_t retlen;
loff_t offset;
uint8_t sect_buf[SECTOR_SIZE];
uint8_t *sect_buf;
cis_sector = -1;
sect_buf = kmalloc(SECTOR_SIZE, GFP_KERNEL);
if (!sect_buf)
goto out;
/*
* Look for CIS/IDI sector on the first GOOD block (give up after 4 bad
* blocks). If the first good block doesn't contain CIS number the flash
* is not SSFDC formatted
*/
cis_sector = -1;
for (k = 0, offset = 0; k < 4; k++, offset += mtd->erasesize) {
if (!mtd->block_isbad(mtd, offset)) {
ret = mtd->read(mtd, offset, SECTOR_SIZE, &retlen,
sect_buf);
/* CIS pattern match on the sector buffer */
if ( ret < 0 || retlen != SECTOR_SIZE ) {
if (ret < 0 || retlen != SECTOR_SIZE) {
printk(KERN_WARNING
"SSFDC_RO:can't read CIS/IDI sector\n");
} else if ( !memcmp(sect_buf, cis_numbers,
sizeof(cis_numbers)) ) {
} else if (!memcmp(sect_buf, cis_numbers,
sizeof(cis_numbers))) {
/* Found */
cis_sector = (int)(offset >> SECTOR_SHIFT);
} else {
@ -140,6 +144,8 @@ static int get_valid_cis_sector(struct mtd_info *mtd)
}
}
kfree(sect_buf);
out:
return cis_sector;
}
@ -227,7 +233,7 @@ static int get_logical_address(uint8_t *oob_buf)
}
}
if ( !ok )
if (!ok)
block_address = -2;
DEBUG(MTD_DEBUG_LEVEL3, "SSFDC_RO: get_logical_address() %d\n",
@ -245,8 +251,8 @@ static int build_logical_block_map(struct ssfdcr_record *ssfdc)
struct mtd_info *mtd = ssfdc->mbd.mtd;
DEBUG(MTD_DEBUG_LEVEL1, "SSFDC_RO: build_block_map() nblks=%d (%luK)\n",
ssfdc->map_len, (unsigned long)ssfdc->map_len *
ssfdc->erase_size / 1024 );
ssfdc->map_len,
(unsigned long)ssfdc->map_len * ssfdc->erase_size / 1024);
/* Scan every physical block, skip CIS block */
for (phys_block = ssfdc->cis_block + 1; phys_block < ssfdc->map_len;
@ -323,21 +329,21 @@ static void ssfdcr_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd)
/* Set geometry */
ssfdc->heads = 16;
ssfdc->sectors = 32;
get_chs( mtd->size, NULL, &ssfdc->heads, &ssfdc->sectors);
get_chs(mtd->size, NULL, &ssfdc->heads, &ssfdc->sectors);
ssfdc->cylinders = (unsigned short)((mtd->size >> SECTOR_SHIFT) /
((long)ssfdc->sectors * (long)ssfdc->heads));
DEBUG(MTD_DEBUG_LEVEL1, "SSFDC_RO: using C:%d H:%d S:%d == %ld sects\n",
ssfdc->cylinders, ssfdc->heads , ssfdc->sectors,
(long)ssfdc->cylinders * (long)ssfdc->heads *
(long)ssfdc->sectors );
(long)ssfdc->sectors);
ssfdc->mbd.size = (long)ssfdc->heads * (long)ssfdc->cylinders *
(long)ssfdc->sectors;
/* Allocate logical block map */
ssfdc->logic_block_map = kmalloc( sizeof(ssfdc->logic_block_map[0]) *
ssfdc->map_len, GFP_KERNEL);
ssfdc->logic_block_map = kmalloc(sizeof(ssfdc->logic_block_map[0]) *
ssfdc->map_len, GFP_KERNEL);
if (!ssfdc->logic_block_map) {
printk(KERN_WARNING
"SSFDC_RO: out of memory for data structures\n");
@ -408,7 +414,7 @@ static int ssfdcr_readsect(struct mtd_blktrans_dev *dev,
"SSFDC_RO: ssfdcr_readsect() phys_sect_no=%lu\n",
sect_no);
if (read_physical_sector( ssfdc->mbd.mtd, buf, sect_no ) < 0)
if (read_physical_sector(ssfdc->mbd.mtd, buf, sect_no) < 0)
return -EIO;
} else {
memset(buf, 0xff, SECTOR_SIZE);