size_t *retlen, u_char *buf);
static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf);
-static int doc_read_oob(struct mtd_info *mtd, loff_t ofs,
- struct mtd_oob_ops *ops);
-static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
- struct mtd_oob_ops *ops);
+static int doc_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *eccbuf,
+ struct nand_oobinfo *oobsel);
+static int doc_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf, u_char *eccbuf,
+ struct nand_oobinfo *oobsel);
+static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
+ size_t *retlen, u_char *buf);
+static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
+ size_t *retlen, const u_char *buf);
static int doc_erase (struct mtd_info *mtd, struct erase_info *instr);
static struct mtd_info *docmillist = NULL;
return retval;
}
-/* This routine is found from the docprobe code by symbol_get(),
- * which will bump the use count of this module. */
-void DoCMil_init(struct mtd_info *mtd)
+static const char im_name[] = "DoCMil_init";
+
+/* This routine is made available to other mtd code via
+ * inter_module_register. It must only be accessed through
+ * inter_module_get which will bump the use count of this module. The
+ * addresses passed back in mtd are valid as long as the use count of
+ * this module is non-zero, i.e. between inter_module_get and
+ * inter_module_put. Keith Owens <kaos@ocs.com.au> 29 Oct 2000.
+ */
+static void DoCMil_init(struct mtd_info *mtd)
{
struct DiskOnChip *this = mtd->priv;
struct DiskOnChip *old = NULL;
/* FIXME: erase size is not always 8KiB */
mtd->erasesize = 0x2000;
- mtd->writesize = 512;
+ mtd->oobblock = 512;
mtd->oobsize = 16;
mtd->owner = THIS_MODULE;
mtd->erase = doc_erase;
mtd->unpoint = NULL;
mtd->read = doc_read;
mtd->write = doc_write;
+ mtd->read_ecc = doc_read_ecc;
+ mtd->write_ecc = doc_write_ecc;
mtd->read_oob = doc_read_oob;
mtd->write_oob = doc_write_oob;
mtd->sync = NULL;
return;
}
}
-EXPORT_SYMBOL_GPL(DoCMil_init);
static int doc_read (struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
+{
+ /* Just a special case of doc_read_ecc */
+ return doc_read_ecc(mtd, from, len, retlen, buf, NULL, NULL);
+}
+
+static int doc_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf, u_char *eccbuf,
+ struct nand_oobinfo *oobsel)
{
int i, ret;
volatile char dummy;
- unsigned char syndrome[6], eccbuf[6];
+ unsigned char syndrome[6];
struct DiskOnChip *this = mtd->priv;
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[from >> (this->chipshift)];
DoC_Address(docptr, 3, from, CDSN_CTRL_WP, 0x00);
DoC_WaitReady(docptr);
- /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/
- WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC (DOC_ECC_EN, docptr, ECCConf);
+ if (eccbuf) {
+ /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/
+ WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC (DOC_ECC_EN, docptr, ECCConf);
+ } else {
+ /* disable the ECC engine */
+ WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC (DOC_ECC_DIS, docptr, ECCConf);
+ }
/* Read the data via the internal pipeline through CDSN IO register,
see Pipelined Read Operations 11.3 */
*retlen = len;
ret = 0;
- /* Read the ECC data from Spare Data Area,
- see Reed-Solomon EDC/ECC 11.1 */
- dummy = ReadDOC(docptr, ReadPipeInit);
+ if (eccbuf) {
+ /* Read the ECC data from Spare Data Area,
+ see Reed-Solomon EDC/ECC 11.1 */
+ dummy = ReadDOC(docptr, ReadPipeInit);
#ifndef USE_MEMCPY
- for (i = 0; i < 5; i++) {
- /* N.B. you have to increase the source address in this way or the
- ECC logic will not work properly */
- eccbuf[i] = ReadDOC(docptr, Mil_CDSN_IO + i);
- }
+ for (i = 0; i < 5; i++) {
+ /* N.B. you have to increase the source address in this way or the
+ ECC logic will not work properly */
+ eccbuf[i] = ReadDOC(docptr, Mil_CDSN_IO + i);
+ }
#else
- memcpy_fromio(eccbuf, docptr + DoC_Mil_CDSN_IO, 5);
+ memcpy_fromio(eccbuf, docptr + DoC_Mil_CDSN_IO, 5);
#endif
- eccbuf[5] = ReadDOC(docptr, LastDataRead);
+ eccbuf[5] = ReadDOC(docptr, LastDataRead);
- /* Flush the pipeline */
- dummy = ReadDOC(docptr, ECCConf);
- dummy = ReadDOC(docptr, ECCConf);
+ /* Flush the pipeline */
+ dummy = ReadDOC(docptr, ECCConf);
+ dummy = ReadDOC(docptr, ECCConf);
- /* Check the ECC Status */
- if (ReadDOC(docptr, ECCConf) & 0x80) {
- int nb_errors;
- /* There was an ECC error */
+ /* Check the ECC Status */
+ if (ReadDOC(docptr, ECCConf) & 0x80) {
+ int nb_errors;
+ /* There was an ECC error */
#ifdef ECC_DEBUG
- printk("DiskOnChip ECC Error: Read at %lx\n", (long)from);
+ printk("DiskOnChip ECC Error: Read at %lx\n", (long)from);
#endif
- /* Read the ECC syndrom through the DiskOnChip ECC logic.
- These syndrome will be all ZERO when there is no error */
- for (i = 0; i < 6; i++) {
- syndrome[i] = ReadDOC(docptr, ECCSyndrome0 + i);
- }
- nb_errors = doc_decode_ecc(buf, syndrome);
+ /* Read the ECC syndrom through the DiskOnChip ECC logic.
+ These syndrome will be all ZERO when there is no error */
+ for (i = 0; i < 6; i++) {
+ syndrome[i] = ReadDOC(docptr, ECCSyndrome0 + i);
+ }
+ nb_errors = doc_decode_ecc(buf, syndrome);
#ifdef ECC_DEBUG
- printk("ECC Errors corrected: %x\n", nb_errors);
+ printk("ECC Errors corrected: %x\n", nb_errors);
#endif
- if (nb_errors < 0) {
- /* We return error, but have actually done the read. Not that
- this can be told to user-space, via sys_read(), but at least
- MTD-aware stuff can know about it by checking *retlen */
- ret = -EIO;
+ if (nb_errors < 0) {
+ /* We return error, but have actually done the read. Not that
+ this can be told to user-space, via sys_read(), but at least
+ MTD-aware stuff can know about it by checking *retlen */
+ ret = -EIO;
+ }
}
- }
#ifdef PSYCHO_DEBUG
- printk("ECC DATA at %lx: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n",
- (long)from, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3],
- eccbuf[4], eccbuf[5]);
+ printk("ECC DATA at %lx: %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n",
+ (long)from, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3],
+ eccbuf[4], eccbuf[5]);
#endif
- /* disable the ECC engine */
- WriteDOC(DOC_ECC_DIS, docptr , ECCConf);
+ /* disable the ECC engine */
+ WriteDOC(DOC_ECC_DIS, docptr , ECCConf);
+ }
return ret;
}
static int doc_write (struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
- int i,ret = 0;
char eccbuf[6];
+ return doc_write_ecc(mtd, to, len, retlen, buf, eccbuf, NULL);
+}
+
+static int doc_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf, u_char *eccbuf,
+ struct nand_oobinfo *oobsel)
+{
+ int i,ret = 0;
volatile char dummy;
struct DiskOnChip *this = mtd->priv;
void __iomem *docptr = this->virtadr;
DoC_Address(docptr, 3, to, 0x00, 0x00);
DoC_WaitReady(docptr);
- /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/
- WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
- WriteDOC (DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
+ if (eccbuf) {
+ /* init the ECC engine, see Reed-Solomon EDC/ECC 11.1 .*/
+ WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC (DOC_ECC_EN | DOC_ECC_RW, docptr, ECCConf);
+ } else {
+ /* disable the ECC engine */
+ WriteDOC (DOC_ECC_RESET, docptr, ECCConf);
+ WriteDOC (DOC_ECC_DIS, docptr, ECCConf);
+ }
/* Write the data via the internal pipeline through CDSN IO register,
see Pipelined Write Operations 11.2 */
#endif
WriteDOC(0x00, docptr, WritePipeTerm);
- /* Write ECC data to flash, the ECC info is generated by the DiskOnChip ECC logic
- see Reed-Solomon EDC/ECC 11.1 */
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
- WriteDOC(0, docptr, NOP);
+ if (eccbuf) {
+ /* Write ECC data to flash, the ECC info is generated by the DiskOnChip ECC logic
+ see Reed-Solomon EDC/ECC 11.1 */
+ WriteDOC(0, docptr, NOP);
+ WriteDOC(0, docptr, NOP);
+ WriteDOC(0, docptr, NOP);
- /* Read the ECC data through the DiskOnChip ECC logic */
- for (i = 0; i < 6; i++) {
- eccbuf[i] = ReadDOC(docptr, ECCSyndrome0 + i);
- }
+ /* Read the ECC data through the DiskOnChip ECC logic */
+ for (i = 0; i < 6; i++) {
+ eccbuf[i] = ReadDOC(docptr, ECCSyndrome0 + i);
+ }
- /* ignore the ECC engine */
- WriteDOC(DOC_ECC_DIS, docptr , ECCConf);
+ /* ignore the ECC engine */
+ WriteDOC(DOC_ECC_DIS, docptr , ECCConf);
#ifndef USE_MEMCPY
- /* Write the ECC data to flash */
- for (i = 0; i < 6; i++) {
- /* N.B. you have to increase the source address in this way or the
- ECC logic will not work properly */
- WriteDOC(eccbuf[i], docptr, Mil_CDSN_IO + i);
- }
+ /* Write the ECC data to flash */
+ for (i = 0; i < 6; i++) {
+ /* N.B. you have to increase the source address in this way or the
+ ECC logic will not work properly */
+ WriteDOC(eccbuf[i], docptr, Mil_CDSN_IO + i);
+ }
#else
- memcpy_toio(docptr + DoC_Mil_CDSN_IO, eccbuf, 6);
+ memcpy_toio(docptr + DoC_Mil_CDSN_IO, eccbuf, 6);
#endif
- /* write the block status BLOCK_USED (0x5555) at the end of ECC data
- FIXME: this is only a hack for programming the IPL area for LinuxBIOS
- and should be replace with proper codes in user space utilities */
- WriteDOC(0x55, docptr, Mil_CDSN_IO);
- WriteDOC(0x55, docptr, Mil_CDSN_IO + 1);
+ /* write the block status BLOCK_USED (0x5555) at the end of ECC data
+ FIXME: this is only a hack for programming the IPL area for LinuxBIOS
+ and should be replace with proper codes in user space utilities */
+ WriteDOC(0x55, docptr, Mil_CDSN_IO);
+ WriteDOC(0x55, docptr, Mil_CDSN_IO + 1);
- WriteDOC(0x00, docptr, WritePipeTerm);
+ WriteDOC(0x00, docptr, WritePipeTerm);
#ifdef PSYCHO_DEBUG
- printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n",
- (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3],
- eccbuf[4], eccbuf[5]);
+ printk("OOB data at %lx is %2.2X %2.2X %2.2X %2.2X %2.2X %2.2X\n",
+ (long) to, eccbuf[0], eccbuf[1], eccbuf[2], eccbuf[3],
+ eccbuf[4], eccbuf[5]);
#endif
+ }
/* Commit the Page Program command and wait for ready
see Software Requirement 11.4 item 1.*/
return ret;
}
-static int doc_read_oob(struct mtd_info *mtd, loff_t ofs,
- struct mtd_oob_ops *ops)
+static int doc_read_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
+ size_t *retlen, u_char *buf)
{
#ifndef USE_MEMCPY
int i;
struct DiskOnChip *this = mtd->priv;
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[ofs >> this->chipshift];
- uint8_t *buf = ops->oobbuf;
- size_t len = ops->len;
-
- BUG_ON(ops->mode != MTD_OOB_PLACE);
-
- ofs += ops->ooboffs;
/* Find the chip which is to be used and select it */
if (this->curfloor != mychip->floor) {
#endif
buf[len - 1] = ReadDOC(docptr, LastDataRead);
- ops->retlen = len;
+ *retlen = len;
return 0;
}
-static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
- struct mtd_oob_ops *ops)
+static int doc_write_oob(struct mtd_info *mtd, loff_t ofs, size_t len,
+ size_t *retlen, const u_char *buf)
{
#ifndef USE_MEMCPY
int i;
struct DiskOnChip *this = mtd->priv;
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[ofs >> this->chipshift];
- uint8_t *buf = ops->oobbuf;
- size_t len = ops->len;
-
- BUG_ON(ops->mode != MTD_OOB_PLACE);
-
- ofs += ops->ooboffs;
/* Find the chip which is to be used and select it */
if (this->curfloor != mychip->floor) {
if (ReadDOC(docptr, Mil_CDSN_IO) & 1) {
printk("Error programming oob data\n");
/* FIXME: implement Bad Block Replacement (in nftl.c ??) */
- ops->retlen = 0;
+ *retlen = 0;
ret = -EIO;
}
dummy = ReadDOC(docptr, LastDataRead);
- ops->retlen = len;
+ *retlen = len;
return ret;
}
*
****************************************************************************/
+static int __init init_doc2001(void)
+{
+ inter_module_register(im_name, THIS_MODULE, &DoCMil_init);
+ return 0;
+}
+
static void __exit cleanup_doc2001(void)
{
struct mtd_info *mtd;
kfree(this->chips);
kfree(mtd);
}
+ inter_module_unregister(im_name);
}
module_exit(cleanup_doc2001);
+module_init(init_doc2001);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org> et al.");
git://git.onelab.eu / linux-2.6.git / blobdiff