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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-30 17:31:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-30 17:31:56 -0700
commit623ff7739e7c00fa3d55dbfd42a492a68298fd7a (patch)
tree0b7461753a1b13b27ea2958a7d48c6efb47bba54 /drivers/mtd/devices
parentc39e8ede284f469971589f2e04af78216e1a771d (diff)
parent7b0e67f604e1829e5292e1ad7743eb18dc42ea7c (diff)
Merge tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6
Pull MTD changes from David Woodhouse: - Artem's cleanup of the MTD API continues apace. - Fixes and improvements for ST FSMC and SuperH FLCTL NAND, amongst others. - More work on DiskOnChip G3, new driver for DiskOnChip G4. - Clean up debug/warning printks in JFFS2 to use pr_<level>. Fix up various trivial conflicts, largely due to changes in calling conventions for things like dmaengine_prep_slave_sg() (new inline wrapper to hide new parameter, clashing with rewrite of previously last parameter that used to be an 'append' flag, and is now a bitmap of 'unsigned long flags'). (Also some header file fallout - like so many merges this merge window - and silly conflicts with sparse fixes) * tag 'for-linus-3.4' of git://git.infradead.org/mtd-2.6: (120 commits) mtd: docg3 add protection against concurrency mtd: docg3 refactor cascade floors structure mtd: docg3 increase write/erase timeout mtd: docg3 fix inbound calculations mtd: nand: gpmi: fix function annotations mtd: phram: fix section mismatch for phram_setup mtd: unify initialization of erase_info->fail_addr mtd: support ONFI multi lun NAND mtd: sm_ftl: fix typo in major number. mtd: add device-tree support to spear_smi mtd: spear_smi: Remove default partition information from driver mtd: Add device-tree support to fsmc_nand mtd: fix section mismatch for doc_probe_device mtd: nand/fsmc: Remove sparse warnings and errors mtd: nand/fsmc: Add DMA support mtd: nand/fsmc: Access the NAND device word by word whenever possible mtd: nand/fsmc: Use dev_err to report error scenario mtd: nand/fsmc: Use devm routines mtd: nand/fsmc: Modify fsmc driver to accept nand timing parameters via platform mtd: fsmc_nand: add pm callbacks to support hibernation ...
Diffstat (limited to 'drivers/mtd/devices')
-rw-r--r--drivers/mtd/devices/Kconfig7
-rw-r--r--drivers/mtd/devices/Makefile1
-rw-r--r--drivers/mtd/devices/block2mtd.c28
-rw-r--r--drivers/mtd/devices/doc2000.c25
-rw-r--r--drivers/mtd/devices/doc2001.c22
-rw-r--r--drivers/mtd/devices/doc2001plus.c22
-rw-r--r--drivers/mtd/devices/docg3.c201
-rw-r--r--drivers/mtd/devices/docg3.h20
-rw-r--r--drivers/mtd/devices/lart.c17
-rw-r--r--drivers/mtd/devices/m25p80.c56
-rw-r--r--drivers/mtd/devices/ms02-nv.c12
-rw-r--r--drivers/mtd/devices/mtd_dataflash.c50
-rw-r--r--drivers/mtd/devices/mtdram.c35
-rw-r--r--drivers/mtd/devices/phram.c76
-rw-r--r--drivers/mtd/devices/pmc551.c99
-rw-r--r--drivers/mtd/devices/slram.c41
-rw-r--r--drivers/mtd/devices/spear_smi.c1147
-rw-r--r--drivers/mtd/devices/sst25l.c46
18 files changed, 1444 insertions, 461 deletions
diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
index 8d3dac40d7e..4cdb2af7bf4 100644
--- a/drivers/mtd/devices/Kconfig
+++ b/drivers/mtd/devices/Kconfig
@@ -103,6 +103,13 @@ config M25PXX_USE_FAST_READ
help
This option enables FAST_READ access supported by ST M25Pxx.
+config MTD_SPEAR_SMI
+ tristate "SPEAR MTD NOR Support through SMI controller"
+ depends on PLAT_SPEAR
+ default y
+ help
+ This enable SNOR support on SPEAR platforms using SMI controller
+
config MTD_SST25L
tristate "Support SST25L (non JEDEC) SPI Flash chips"
depends on SPI_MASTER
diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
index 56c7cd462f1..a4dd1d822b6 100644
--- a/drivers/mtd/devices/Makefile
+++ b/drivers/mtd/devices/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_MTD_LART) += lart.o
obj-$(CONFIG_MTD_BLOCK2MTD) += block2mtd.o
obj-$(CONFIG_MTD_DATAFLASH) += mtd_dataflash.o
obj-$(CONFIG_MTD_M25P80) += m25p80.o
+obj-$(CONFIG_MTD_SPEAR_SMI) += spear_smi.o
obj-$(CONFIG_MTD_SST25L) += sst25l.o
CFLAGS_docg3.o += -I$(src) \ No newline at end of file
diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index e7e46d1e746..a4a80b742e6 100644
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -104,14 +104,6 @@ static int block2mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
int offset = from & (PAGE_SIZE-1);
int cpylen;
- if (from > mtd->size)
- return -EINVAL;
- if (from + len > mtd->size)
- len = mtd->size - from;
-
- if (retlen)
- *retlen = 0;
-
while (len) {
if ((offset + len) > PAGE_SIZE)
cpylen = PAGE_SIZE - offset; // multiple pages
@@ -148,8 +140,6 @@ static int _block2mtd_write(struct block2mtd_dev *dev, const u_char *buf,
int offset = to & ~PAGE_MASK; // page offset
int cpylen;
- if (retlen)
- *retlen = 0;
while (len) {
if ((offset+len) > PAGE_SIZE)
cpylen = PAGE_SIZE - offset; // multiple pages
@@ -188,13 +178,6 @@ static int block2mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
struct block2mtd_dev *dev = mtd->priv;
int err;
- if (!len)
- return 0;
- if (to >= mtd->size)
- return -ENOSPC;
- if (to + len > mtd->size)
- len = mtd->size - to;
-
mutex_lock(&dev->write_mutex);
err = _block2mtd_write(dev, buf, to, len, retlen);
mutex_unlock(&dev->write_mutex);
@@ -283,13 +266,14 @@ static struct block2mtd_dev *add_device(char *devname, int erase_size)
dev->mtd.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;
dev->mtd.erasesize = erase_size;
dev->mtd.writesize = 1;
+ dev->mtd.writebufsize = PAGE_SIZE;
dev->mtd.type = MTD_RAM;
dev->mtd.flags = MTD_CAP_RAM;
- dev->mtd.erase = block2mtd_erase;
- dev->mtd.write = block2mtd_write;
- dev->mtd.writev = mtd_writev;
- dev->mtd.sync = block2mtd_sync;
- dev->mtd.read = block2mtd_read;
+ dev->mtd._erase = block2mtd_erase;
+ dev->mtd._write = block2mtd_write;
+ dev->mtd._writev = mtd_writev;
+ dev->mtd._sync = block2mtd_sync;
+ dev->mtd._read = block2mtd_read;
dev->mtd.priv = dev;
dev->mtd.owner = THIS_MODULE;
diff --git a/drivers/mtd/devices/doc2000.c b/drivers/mtd/devices/doc2000.c
index b1cdf647901..a4eb8b5b85e 100644
--- a/drivers/mtd/devices/doc2000.c
+++ b/drivers/mtd/devices/doc2000.c
@@ -562,14 +562,15 @@ void DoC2k_init(struct mtd_info *mtd)
mtd->type = MTD_NANDFLASH;
mtd->flags = MTD_CAP_NANDFLASH;
- mtd->writesize = 512;
+ mtd->writebufsize = mtd->writesize = 512;
mtd->oobsize = 16;
+ mtd->ecc_strength = 2;
mtd->owner = THIS_MODULE;
- mtd->erase = doc_erase;
- mtd->read = doc_read;
- mtd->write = doc_write;
- mtd->read_oob = doc_read_oob;
- mtd->write_oob = doc_write_oob;
+ mtd->_erase = doc_erase;
+ mtd->_read = doc_read;
+ mtd->_write = doc_write;
+ mtd->_read_oob = doc_read_oob;
+ mtd->_write_oob = doc_write_oob;
this->curfloor = -1;
this->curchip = -1;
mutex_init(&this->lock);
@@ -602,13 +603,7 @@ static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
int i, len256 = 0, ret=0;
size_t left = len;
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
mutex_lock(&this->lock);
-
- *retlen = 0;
while (left) {
len = left;
@@ -748,13 +743,7 @@ static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t left = len;
int status;
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
mutex_lock(&this->lock);
-
- *retlen = 0;
while (left) {
len = left;
diff --git a/drivers/mtd/devices/doc2001.c b/drivers/mtd/devices/doc2001.c
index 7543b98f46c..f6927955dab 100644
--- a/drivers/mtd/devices/doc2001.c
+++ b/drivers/mtd/devices/doc2001.c
@@ -346,14 +346,15 @@ void DoCMil_init(struct mtd_info *mtd)
/* FIXME: erase size is not always 8KiB */
mtd->erasesize = 0x2000;
- mtd->writesize = 512;
+ mtd->writebufsize = mtd->writesize = 512;
mtd->oobsize = 16;
+ mtd->ecc_strength = 2;
mtd->owner = THIS_MODULE;
- mtd->erase = doc_erase;
- mtd->read = doc_read;
- mtd->write = doc_write;
- mtd->read_oob = doc_read_oob;
- mtd->write_oob = doc_write_oob;
+ mtd->_erase = doc_erase;
+ mtd->_read = doc_read;
+ mtd->_write = doc_write;
+ mtd->_read_oob = doc_read_oob;
+ mtd->_write_oob = doc_write_oob;
this->curfloor = -1;
this->curchip = -1;
@@ -383,10 +384,6 @@ static int doc_read (struct mtd_info *mtd, loff_t from, size_t len,
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[from >> (this->chipshift)];
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
/* Don't allow a single read to cross a 512-byte block boundary */
if (from + len > ((from | 0x1ff) + 1))
len = ((from | 0x1ff) + 1) - from;
@@ -494,10 +491,6 @@ static int doc_write (struct mtd_info *mtd, loff_t to, size_t len,
void __iomem *docptr = this->virtadr;
struct Nand *mychip = &this->chips[to >> (this->chipshift)];
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
#if 0
/* Don't allow a single write to cross a 512-byte block boundary */
if (to + len > ( (to | 0x1ff) + 1))
@@ -599,7 +592,6 @@ static int doc_write (struct mtd_info *mtd, loff_t to, size_t len,
printk("Error programming flash\n");
/* Error in programming
FIXME: implement Bad Block Replacement (in nftl.c ??) */
- *retlen = 0;
ret = -EIO;
}
dummy = ReadDOC(docptr, LastDataRead);
diff --git a/drivers/mtd/devices/doc2001plus.c b/drivers/mtd/devices/doc2001plus.c
index 177510d0e7e..04eb2e4aa50 100644
--- a/drivers/mtd/devices/doc2001plus.c
+++ b/drivers/mtd/devices/doc2001plus.c
@@ -467,14 +467,15 @@ void DoCMilPlus_init(struct mtd_info *mtd)
mtd->type = MTD_NANDFLASH;
mtd->flags = MTD_CAP_NANDFLASH;
- mtd->writesize = 512;
+ mtd->writebufsize = mtd->writesize = 512;
mtd->oobsize = 16;
+ mtd->ecc_strength = 2;
mtd->owner = THIS_MODULE;
- mtd->erase = doc_erase;
- mtd->read = doc_read;
- mtd->write = doc_write;
- mtd->read_oob = doc_read_oob;
- mtd->write_oob = doc_write_oob;
+ mtd->_erase = doc_erase;
+ mtd->_read = doc_read;
+ mtd->_write = doc_write;
+ mtd->_read_oob = doc_read_oob;
+ mtd->_write_oob = doc_write_oob;
this->curfloor = -1;
this->curchip = -1;
@@ -581,10 +582,6 @@ static int doc_read(struct mtd_info *mtd, loff_t from, size_t len,
void __iomem * docptr = this->virtadr;
struct Nand *mychip = &this->chips[from >> (this->chipshift)];
- /* Don't allow read past end of device */
- if (from >= this->totlen)
- return -EINVAL;
-
/* Don't allow a single read to cross a 512-byte block boundary */
if (from + len > ((from | 0x1ff) + 1))
len = ((from | 0x1ff) + 1) - from;
@@ -700,10 +697,6 @@ static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
void __iomem * docptr = this->virtadr;
struct Nand *mychip = &this->chips[to >> (this->chipshift)];
- /* Don't allow write past end of device */
- if (to >= this->totlen)
- return -EINVAL;
-
/* Don't allow writes which aren't exactly one block (512 bytes) */
if ((to & 0x1ff) || (len != 0x200))
return -EINVAL;
@@ -800,7 +793,6 @@ static int doc_write(struct mtd_info *mtd, loff_t to, size_t len,
printk("MTD: Error 0x%x programming at 0x%x\n", dummy, (int)to);
/* Error in programming
FIXME: implement Bad Block Replacement (in nftl.c ??) */
- *retlen = 0;
ret = -EIO;
}
dummy = ReadDOC(docptr, Mplus_LastDataRead);
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index ad11ef0a81f..8272c02668d 100644
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -80,14 +80,9 @@ static struct nand_ecclayout docg3_oobinfo = {
.oobavail = 8,
};
-/**
- * struct docg3_bch - BCH engine
- */
-static struct bch_control *docg3_bch;
-
static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
{
- u8 val = readb(docg3->base + reg);
+ u8 val = readb(docg3->cascade->base + reg);
trace_docg3_io(0, 8, reg, (int)val);
return val;
@@ -95,7 +90,7 @@ static inline u8 doc_readb(struct docg3 *docg3, u16 reg)
static inline u16 doc_readw(struct docg3 *docg3, u16 reg)
{
- u16 val = readw(docg3->base + reg);
+ u16 val = readw(docg3->cascade->base + reg);
trace_docg3_io(0, 16, reg, (int)val);
return val;
@@ -103,13 +98,13 @@ static inline u16 doc_readw(struct docg3 *docg3, u16 reg)
static inline void doc_writeb(struct docg3 *docg3, u8 val, u16 reg)
{
- writeb(val, docg3->base + reg);
+ writeb(val, docg3->cascade->base + reg);
trace_docg3_io(1, 8, reg, val);
}
static inline void doc_writew(struct docg3 *docg3, u16 val, u16 reg)
{
- writew(val, docg3->base + reg);
+ writew(val, docg3->cascade->base + reg);
trace_docg3_io(1, 16, reg, val);
}
@@ -643,7 +638,8 @@ static int doc_ecc_bch_fix_data(struct docg3 *docg3, void *buf, u8 *hwecc)
for (i = 0; i < DOC_ECC_BCH_SIZE; i++)
ecc[i] = bitrev8(hwecc[i]);
- numerrs = decode_bch(docg3_bch, NULL, DOC_ECC_BCH_COVERED_BYTES,
+ numerrs = decode_bch(docg3->cascade->bch, NULL,
+ DOC_ECC_BCH_COVERED_BYTES,
NULL, ecc, NULL, errorpos);
BUG_ON(numerrs == -EINVAL);
if (numerrs < 0)
@@ -734,7 +730,7 @@ err:
* doc_read_page_getbytes - Reads bytes from a prepared page
* @docg3: the device
* @len: the number of bytes to be read (must be a multiple of 4)
- * @buf: the buffer to be filled in
+ * @buf: the buffer to be filled in (or NULL is forget bytes)
* @first: 1 if first time read, DOC_READADDRESS should be set
*
*/
@@ -849,7 +845,7 @@ static int doc_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, ret, ofs = 0;
+ int block0, block1, page, ret, skip, ofs = 0;
u8 *oobbuf = ops->oobbuf;
u8 *buf = ops->datbuf;
size_t len, ooblen, nbdata, nboob;
@@ -869,34 +865,36 @@ static int doc_read_oob(struct mtd_info *mtd, loff_t from,
doc_dbg("doc_read_oob(from=%lld, mode=%d, data=(%p:%zu), oob=(%p:%zu))\n",
from, ops->mode, buf, len, oobbuf, ooblen);
- if ((len % DOC_LAYOUT_PAGE_SIZE) || (ooblen % DOC_LAYOUT_OOB_SIZE) ||
- (from % DOC_LAYOUT_PAGE_SIZE))
+ if (ooblen % DOC_LAYOUT_OOB_SIZE)
return -EINVAL;
- ret = -EINVAL;
- calc_block_sector(from + len, &block0, &block1, &page, &ofs,
- docg3->reliable);
- if (block1 > docg3->max_block)
- goto err;
+ if (from + len > mtd->size)
+ return -EINVAL;
ops->oobretlen = 0;
ops->retlen = 0;
ret = 0;
+ skip = from % DOC_LAYOUT_PAGE_SIZE;
+ mutex_lock(&docg3->cascade->lock);
while (!ret && (len > 0 || ooblen > 0)) {
- calc_block_sector(from, &block0, &block1, &page, &ofs,
+ calc_block_sector(from - skip, &block0, &block1, &page, &ofs,
docg3->reliable);
- nbdata = min_t(size_t, len, (size_t)DOC_LAYOUT_PAGE_SIZE);
+ nbdata = min_t(size_t, len, DOC_LAYOUT_PAGE_SIZE - skip);
nboob = min_t(size_t, ooblen, (size_t)DOC_LAYOUT_OOB_SIZE);
ret = doc_read_page_prepare(docg3, block0, block1, page, ofs);
if (ret < 0)
- goto err;
+ goto out;
ret = doc_read_page_ecc_init(docg3, DOC_ECC_BCH_TOTAL_BYTES);
if (ret < 0)
goto err_in_read;
- ret = doc_read_page_getbytes(docg3, nbdata, buf, 1);
+ ret = doc_read_page_getbytes(docg3, skip, NULL, 1);
+ if (ret < skip)
+ goto err_in_read;
+ ret = doc_read_page_getbytes(docg3, nbdata, buf, 0);
if (ret < nbdata)
goto err_in_read;
- doc_read_page_getbytes(docg3, DOC_LAYOUT_PAGE_SIZE - nbdata,
+ doc_read_page_getbytes(docg3,
+ DOC_LAYOUT_PAGE_SIZE - nbdata - skip,
NULL, 0);
ret = doc_read_page_getbytes(docg3, nboob, oobbuf, 0);
if (ret < nboob)
@@ -950,13 +948,15 @@ static int doc_read_oob(struct mtd_info *mtd, loff_t from,
len -= nbdata;
ooblen -= nboob;
from += DOC_LAYOUT_PAGE_SIZE;
+ skip = 0;
}
+out:
+ mutex_unlock(&docg3->cascade->lock);
return ret;
err_in_read:
doc_read_page_finish(docg3);
-err:
- return ret;
+ goto out;
}
/**
@@ -1114,10 +1114,10 @@ static int doc_get_op_status(struct docg3 *docg3)
*/
static int doc_write_erase_wait_status(struct docg3 *docg3)
{
- int status, ret = 0;
+ int i, status, ret = 0;
- if (!doc_is_ready(docg3))
- usleep_range(3000, 3000);
+ for (i = 0; !doc_is_ready(docg3) && i < 5; i++)
+ msleep(20);
if (!doc_is_ready(docg3)) {
doc_dbg("Timeout reached and the chip is still not ready\n");
ret = -EAGAIN;
@@ -1196,18 +1196,19 @@ static int doc_erase(struct mtd_info *mtd, struct erase_info *info)
int block0, block1, page, ret, ofs = 0;
doc_dbg("doc_erase(from=%lld, len=%lld\n", info->addr, info->len);
- doc_set_device_id(docg3, docg3->device_id);
info->state = MTD_ERASE_PENDING;
calc_block_sector(info->addr + info->len, &block0, &block1, &page,
&ofs, docg3->reliable);
ret = -EINVAL;
- if (block1 > docg3->max_block || page || ofs)
+ if (info->addr + info->len > mtd->size || page || ofs)
goto reset_err;
ret = 0;
calc_block_sector(info->addr, &block0, &block1, &page, &ofs,
docg3->reliable);
+ mutex_lock(&docg3->cascade->lock);
+ doc_set_device_id(docg3, docg3->device_id);
doc_set_reliable_mode(docg3);
for (len = info->len; !ret && len > 0; len -= mtd->erasesize) {
info->state = MTD_ERASING;
@@ -1215,6 +1216,7 @@ static int doc_erase(struct mtd_info *mtd, struct erase_info *info)
block0 += 2;
block1 += 2;
}
+ mutex_unlock(&docg3->cascade->lock);
if (ret)
goto reset_err;
@@ -1401,7 +1403,7 @@ static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
struct mtd_oob_ops *ops)
{
struct docg3 *docg3 = mtd->priv;
- int block0, block1, page, ret, pofs = 0, autoecc, oobdelta;
+ int ret, autoecc, oobdelta;
u8 *oobbuf = ops->oobbuf;
u8 *buf = ops->datbuf;
size_t len, ooblen;
@@ -1438,12 +1440,8 @@ static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
if (len && ooblen &&
(len / DOC_LAYOUT_PAGE_SIZE) != (ooblen / oobdelta))
return -EINVAL;
-
- ret = -EINVAL;
- calc_block_sector(ofs + len, &block0, &block1, &page, &pofs,
- docg3->reliable);
- if (block1 > docg3->max_block)
- goto err;
+ if (ofs + len > mtd->size)
+ return -EINVAL;
ops->oobretlen = 0;
ops->retlen = 0;
@@ -1457,6 +1455,7 @@ static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
if (autoecc < 0)
return autoecc;
+ mutex_lock(&docg3->cascade->lock);
while (!ret && len > 0) {
memset(oob, 0, sizeof(oob));
if (ofs == docg3->oob_write_ofs)
@@ -1477,8 +1476,9 @@ static int doc_write_oob(struct mtd_info *mtd, loff_t ofs,
}
ops->retlen += DOC_LAYOUT_PAGE_SIZE;
}
-err:
+
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return ret;
}
@@ -1535,9 +1535,11 @@ static ssize_t dps0_is_key_locked(struct device *dev,
struct docg3 *docg3 = sysfs_dev2docg3(dev, attr);
int dps0;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return sprintf(buf, "%d\n", !(dps0 & DOC_DPS_KEY_OK));
}
@@ -1548,9 +1550,11 @@ static ssize_t dps1_is_key_locked(struct device *dev,
struct docg3 *docg3 = sysfs_dev2docg3(dev, attr);
int dps1;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return sprintf(buf, "%d\n", !(dps1 & DOC_DPS_KEY_OK));
}
@@ -1565,10 +1569,12 @@ static ssize_t dps0_insert_key(struct device *dev,
if (count != DOC_LAYOUT_DPS_KEY_LENGTH)
return -EINVAL;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
for (i = 0; i < DOC_LAYOUT_DPS_KEY_LENGTH; i++)
doc_writeb(docg3, buf[i], DOC_DPS0_KEY);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return count;
}
@@ -1582,10 +1588,12 @@ static ssize_t dps1_insert_key(struct device *dev,
if (count != DOC_LAYOUT_DPS_KEY_LENGTH)
return -EINVAL;
+ mutex_lock(&docg3->cascade->lock);
doc_set_device_id(docg3, docg3->device_id);
for (i = 0; i < DOC_LAYOUT_DPS_KEY_LENGTH; i++)
doc_writeb(docg3, buf[i], DOC_DPS1_KEY);
doc_set_device_id(docg3, 0);
+ mutex_unlock(&docg3->cascade->lock);
return count;
}
@@ -1601,13 +1609,13 @@ static struct device_attribute doc_sys_attrs[DOC_MAX_NBFLOORS][4] = {
};
static int doc_register_sysfs(struct platform_device *pdev,
- struct mtd_info **floors)
+ struct docg3_cascade *cascade)
{
int ret = 0, floor, i = 0;
struct device *dev = &pdev->dev;
- for (floor = 0; !ret && floor < DOC_MAX_NBFLOORS && floors[floor];
- floor++)
+ for (floor = 0; !ret && floor < DOC_MAX_NBFLOORS &&
+ cascade->floors[floor]; floor++)
for (i = 0; !ret && i < 4; i++)
ret = device_create_file(dev, &doc_sys_attrs[floor][i]);
if (!ret)
@@ -1621,12 +1629,12 @@ static int doc_register_sysfs(struct platform_device *pdev,
}
static void doc_unregister_sysfs(struct platform_device *pdev,
- struct mtd_info **floors)
+ struct docg3_cascade *cascade)
{
struct device *dev = &pdev->dev;
int floor, i;
- for (floor = 0; floor < DOC_MAX_NBFLOORS && floors[floor];
+ for (floor = 0; floor < DOC_MAX_NBFLOORS && cascade->floors[floor];
floor++)
for (i = 0; i < 4; i++)
device_remove_file(dev, &doc_sys_attrs[floor][i]);
@@ -1640,7 +1648,11 @@ static int dbg_flashctrl_show(struct seq_file *s, void *p)
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
- u8 fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
+ u8 fctrl;
+
+ mutex_lock(&docg3->cascade->lock);
+ fctrl = doc_register_readb(docg3, DOC_FLASHCONTROL);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s,
"FlashControl : 0x%02x (%s,CE# %s,%s,%s,flash %s)\n",
@@ -1658,9 +1670,12 @@ static int dbg_asicmode_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
- int pos = 0;
- int pctrl = doc_register_readb(docg3, DOC_ASICMODE);
- int mode = pctrl & 0x03;
+ int pos = 0, pctrl, mode;
+
+ mutex_lock(&docg3->cascade->lock);
+ pctrl = doc_register_readb(docg3, DOC_ASICMODE);
+ mode = pctrl & 0x03;
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s,
"%04x : RAM_WE=%d,RSTIN_RESET=%d,BDETCT_RESET=%d,WRITE_ENABLE=%d,POWERDOWN=%d,MODE=%d%d (",
@@ -1692,7 +1707,11 @@ static int dbg_device_id_show(struct seq_file *s, void *p)
{
struct docg3 *docg3 = (struct docg3 *)s->private;
int pos = 0;
- int id = doc_register_readb(docg3, DOC_DEVICESELECT);
+ int id;
+
+ mutex_lock(&docg3->cascade->lock);
+ id = doc_register_readb(docg3, DOC_DEVICESELECT);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s, "DeviceId = %d\n", id);
return pos;
@@ -1705,6 +1724,7 @@ static int dbg_protection_show(struct seq_file *s, void *p)
int pos = 0;
int protect, dps0, dps0_low, dps0_high, dps1, dps1_low, dps1_high;
+ mutex_lock(&docg3->cascade->lock);
protect = doc_register_readb(docg3, DOC_PROTECTION);
dps0 = doc_register_readb(docg3, DOC_DPS0_STATUS);
dps0_low = doc_register_readw(docg3, DOC_DPS0_ADDRLOW);
@@ -1712,6 +1732,7 @@ static int dbg_protection_show(struct seq_file *s, void *p)
dps1 = doc_register_readb(docg3, DOC_DPS1_STATUS);
dps1_low = doc_register_readw(docg3, DOC_DPS1_ADDRLOW);
dps1_high = doc_register_readw(docg3, DOC_DPS1_ADDRHIGH);
+ mutex_unlock(&docg3->cascade->lock);
pos += seq_printf(s, "Protection = 0x%02x (",
protect);
@@ -1804,7 +1825,7 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
switch (chip_id) {
case DOC_CHIPID_G3:
- mtd->name = kasprintf(GFP_KERNEL, "DiskOnChip G3 floor %d",
+ mtd->name = kasprintf(GFP_KERNEL, "docg3.%d",
docg3->device_id);
docg3->max_block = 2047;
break;
@@ -1817,16 +1838,17 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
mtd->erasesize = DOC_LAYOUT_BLOCK_SIZE * DOC_LAYOUT_NBPLANES;
if (docg3->reliable == 2)
mtd->erasesize /= 2;
- mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
+ mtd->writebufsize = mtd->writesize = DOC_LAYOUT_PAGE_SIZE;
mtd->oobsize = DOC_LAYOUT_OOB_SIZE;
mtd->owner = THIS_MODULE;
- mtd->erase = doc_erase;
- mtd->read = doc_read;
- mtd->write = doc_write;
- mtd->read_oob = doc_read_oob;
- mtd->write_oob = doc_write_oob;
- mtd->block_isbad = doc_block_isbad;
+ mtd->_erase = doc_erase;
+ mtd->_read = doc_read;
+ mtd->_write = doc_write;
+ mtd->_read_oob = doc_read_oob;
+ mtd->_write_oob = doc_write_oob;
+ mtd->_block_isbad = doc_block_isbad;
mtd->ecclayout = &docg3_oobinfo;
+ mtd->ecc_strength = DOC_ECC_BCH_T;
}
/**
@@ -1834,6 +1856,7 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
* @base: the io space where the device is probed
* @floor: the floor of the probed device
* @dev: the device
+ * @cascade: the cascade of chips this devices will belong to
*
* Checks whether a device at the specified IO range, and floor is available.
*
@@ -1841,8 +1864,8 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
* if a memory allocation failed. If floor 0 is checked, a reset of the ASIC is
* launched.
*/
-static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
- struct device *dev)
+static struct mtd_info * __init
+doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
{
int ret, bbt_nbpages;
u16 chip_id, chip_id_inv;
@@ -1865,7 +1888,7 @@ static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
docg3->dev = dev;
docg3->device_id = floor;
- docg3->base = base;
+ docg3->cascade = cascade;
doc_set_device_id(docg3, docg3->device_id);
if (!floor)
doc_set_asic_mode(docg3, DOC_ASICMODE_RESET);
@@ -1882,7 +1905,7 @@ static struct mtd_info *doc_probe_device(void __iomem *base, int floor,
switch (chip_id) {
case DOC_CHIPID_G3:
doc_info("Found a G3 DiskOnChip at addr %p, floor %d\n",
- base, floor);
+ docg3->cascade->base, floor);
break;
default:
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
@@ -1927,10 +1950,12 @@ static void doc_release_device(struct mtd_info *mtd)
static int docg3_resume(struct platform_device *pdev)
{
int i;
+ struct docg3_cascade *cascade;
struct mtd_info **docg3_floors, *mtd;
struct docg3 *docg3;
- docg3_floors = platform_get_drvdata(pdev);
+ cascade = platform_get_drvdata(pdev);
+ docg3_floors = cascade->floors;
mtd = docg3_floors[0];
docg3 = mtd->priv;
@@ -1952,11 +1977,13 @@ static int docg3_resume(struct platform_device *pdev)
static int docg3_suspend(struct platform_device *pdev, pm_message_t state)
{
int floor, i;
+ struct docg3_cascade *cascade;
struct mtd_info **docg3_floors, *mtd;
struct docg3 *docg3;
u8 ctrl, pwr_down;
- docg3_floors = platform_get_drvdata(pdev);
+ cascade = platform_get_drvdata(pdev);
+ docg3_floors = cascade->floors;
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) {
mtd = docg3_floors[floor];
if (!mtd)
@@ -2006,7 +2033,7 @@ static int __init docg3_probe(struct platform_device *pdev)
struct resource *ress;
void __iomem *base;
int ret, floor, found = 0;
- struct mtd_info **docg3_floors;
+ struct docg3_cascade *cascade;
ret = -ENXIO;
ress = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -2017,17 +2044,19 @@ static int __init docg3_probe(struct platform_device *pdev)
base = ioremap(ress->start, DOC_IOSPACE_SIZE);
ret = -ENOMEM;
- docg3_floors = kzalloc(sizeof(*docg3_floors) * DOC_MAX_NBFLOORS,
- GFP_KERNEL);
- if (!docg3_floors)
+ cascade = kzalloc(sizeof(*cascade) * DOC_MAX_NBFLOORS,
+ GFP_KERNEL);
+ if (!cascade)
goto nomem1;
- docg3_bch = init_bch(DOC_ECC_BCH_M, DOC_ECC_BCH_T,
+ cascade->base = base;
+ mutex_init(&cascade->lock);
+ cascade->bch = init_bch(DOC_ECC_BCH_M, DOC_ECC_BCH_T,
DOC_ECC_BCH_PRIMPOLY);
- if (!docg3_bch)
+ if (!cascade->bch)
goto nomem2;
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++) {
- mtd = doc_probe_device(base, floor, dev);
+ mtd = doc_probe_device(cascade, floor, dev);
if (IS_ERR(mtd)) {
ret = PTR_ERR(mtd);
goto err_probe;
@@ -2038,7 +2067,7 @@ static int __init docg3_probe(struct platform_device *pdev)
else
continue;
}
- docg3_floors[floor] = mtd;
+ cascade->floors[floor] = mtd;
ret = mtd_device_parse_register(mtd, part_probes, NULL, NULL,
0);
if (ret)
@@ -2046,26 +2075,26 @@ static int __init docg3_probe(struct platform_device *pdev)
found++;
}
- ret = doc_register_sysfs(pdev, docg3_floors);
+ ret = doc_register_sysfs(pdev, cascade);
if (ret)
goto err_probe;
if (!found)
goto notfound;
- platform_set_drvdata(pdev, docg3_floors);
- doc_dbg_register(docg3_floors[0]->priv);
+ platform_set_drvdata(pdev, cascade);
+ doc_dbg_register(cascade->floors[0]->priv);
return 0;
notfound:
ret = -ENODEV;
dev_info(dev, "No supported DiskOnChip found\n");
err_probe:
- free_bch(docg3_bch);
+ kfree(cascade->bch);
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
- if (docg3_floors[floor])
- doc_release_device(docg3_floors[floor]);
+ if (cascade->floors[floor])
+ doc_release_device(cascade->floors[floor]);
nomem2:
- kfree(docg3_floors);
+ kfree(cascade);
nomem1:
iounmap(base);
noress:
@@ -2080,19 +2109,19 @@ noress:
*/
static int __exit docg3_release(struct platform_device *pdev)
{
- struct mtd_info **docg3_floors = platform_get_drvdata(pdev);
- struct docg3 *docg3 = docg3_floors[0]->priv;
- void __iomem *base = docg3->base;
+ struct docg3_cascade *cascade = platform_get_drvdata(pdev);
+ struct docg3 *docg3 = cascade->floors[0]->priv;
+ void __iomem *base = cascade->base;
int floor;
- doc_unregister_sysfs(pdev, docg3_floors);
+ doc_unregister_sysfs(pdev, cascade);
doc_dbg_unregister(docg3);
for (floor = 0; floor < DOC_MAX_NBFLOORS; floor++)
- if (docg3_floors[floor])
- doc_release_device(docg3_floors[floor]);
+ if (cascade->floors[floor])
+ doc_release_device(cascade->floors[floor]);
- kfree(docg3_floors);
- free_bch(docg3_bch);
+ free_bch(docg3->cascade->bch);
+ kfree(cascade);
iounmap(base);
return 0;
}
diff --git a/drivers/mtd/devices/docg3.h b/drivers/mtd/devices/docg3.h
index db0da436b49..19fb93f96a3 100644
--- a/drivers/mtd/devices/docg3.h
+++ b/drivers/mtd/devices/docg3.h
@@ -22,6 +22,8 @@
#ifndef _MTD_DOCG3_H
#define _MTD_DOCG3_H
+#include <linux/mtd/mtd.h>
+
/*
* Flash memory areas :
* - 0x0000 .. 0x07ff : IPL
@@ -267,9 +269,23 @@
#define DOC_LAYOUT_DPS_KEY_LENGTH 8
/**
+ * struct docg3_cascade - Cascade of 1 to 4 docg3 chips
+ * @floors: floors (ie. one physical docg3 chip is one floor)
+ * @base: IO space to access all chips in the cascade
+ * @bch: the BCH correcting control structure
+ * @lock: lock to protect docg3 IO space from concurrent accesses
+ */
+struct docg3_cascade {
+ struct mtd_info *floors[DOC_MAX_NBFLOORS];
+ void __iomem *base;
+ struct bch_control *bch;
+ struct mutex lock;
+};
+
+/**
* struct docg3 - DiskOnChip driver private data
* @dev: the device currently under control
- * @base: mapped IO space
+ * @cascade: the cascade this device belongs to
* @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
* @if_cfg: if true, reads are on 16bits, else reads are on 8bits
@@ -287,7 +303,7 @@
*/
struct docg3 {
struct device *dev;
- void __iomem *base;
+ struct docg3_cascade *cascade;
unsigned int device_id:4;
unsigned int if_cfg:1;
unsigned int reliable:2;
diff --git a/drivers/mtd/devices/lart.c b/drivers/mtd/devices/lart.c
index 3a11ea628e5..82bd00af5cc 100644
--- a/drivers/mtd/devices/lart.c
+++ b/drivers/mtd/devices/lart.c
@@ -367,9 +367,6 @@ static int flash_erase (struct mtd_info *mtd,struct erase_info *instr)
printk (KERN_DEBUG "%s(addr = 0x%.8x, len = %d)\n", __func__, instr->addr, instr->len);
#endif
- /* sanity checks */
- if (instr->addr + instr->len > mtd->size) return (-EINVAL);
-
/*
* check that both start and end of the requested erase are
* aligned with the erasesize at the appropriate addresses.
@@ -440,10 +437,6 @@ static int flash_read (struct mtd_info *mtd,loff_t from,size_t len,size_t *retle
printk (KERN_DEBUG "%s(from = 0x%.8x, len = %d)\n", __func__, (__u32)from, len);
#endif
- /* sanity checks */
- if (!len) return (0);
- if (from + len > mtd->size) return (-EINVAL);
-
/* we always read len bytes */
*retlen = len;
@@ -522,11 +515,8 @@ static int flash_write (struct mtd_info *mtd,loff_t to,size_t len,size_t *retlen
printk (KERN_DEBUG "%s(to = 0x%.8x, len = %d)\n", __func__, (__u32)to, len);
#endif
- *retlen = 0;
-
/* sanity checks */
if (!len) return (0);
- if (to + len > mtd->size) return (-EINVAL);
/* first, we write a 0xFF.... padded byte until we reach a dword boundary */
if (to & (BUSWIDTH - 1))
@@ -630,14 +620,15 @@ static int __init lart_flash_init (void)
mtd.name = module_name;
mtd.type = MTD_NORFLASH;
mtd.writesize = 1;
+ mtd.writebufsize = 4;
mtd.flags = MTD_CAP_NORFLASH;
mtd.size = FLASH_BLOCKSIZE_PARAM * FLASH_NUMBLOCKS_16m_PARAM + FLASH_BLOCKSIZE_MAIN * FLASH_NUMBLOCKS_16m_MAIN;
mtd.erasesize = FLASH_BLOCKSIZE_MAIN;
mtd.numeraseregions = ARRAY_SIZE(erase_regions);
mtd.eraseregions = erase_regions;
- mtd.erase = flash_erase;
- mtd.read = flash_read;
- mtd.write = flash_write;
+ mtd._erase = flash_erase;
+ mtd._read = flash_read;
+ mtd._write = flash_write;
mtd.owner = THIS_MODULE;
#ifdef LART_DEBUG
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 7c60dddbefc..1924d247c1c 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -288,9 +288,6 @@ static int m25p80_erase(struct mtd_info *mtd, struct erase_info *instr)
__func__, (long long)instr->addr,
(long long)instr->len);
- /* sanity checks */
- if (instr->addr + instr->len > flash->mtd.size)
- return -EINVAL;
div_u64_rem(instr->len, mtd->erasesize, &rem);
if (rem)
return -EINVAL;
@@ -349,13 +346,6 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len,
pr_debug("%s: %s from 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
__func__, (u32)from, len);
- /* sanity checks */
- if (!len)
- return 0;
-
- if (from + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
@@ -371,9 +361,6 @@ static int m25p80_read(struct mtd_info *mtd, loff_t from, size_t len,
t[1].len = len;
spi_message_add_tail(&t[1], &m);
- /* Byte count starts at zero. */
- *retlen = 0;
-
mutex_lock(&flash->lock);
/* Wait till previous write/erase is done. */
@@ -417,15 +404,6 @@ static int m25p80_write(struct mtd_info *mtd, loff_t to, size_t len,
pr_debug("%s: %s to 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
__func__, (u32)to, len);
- *retlen = 0;
-
- /* sanity checks */
- if (!len)
- return(0);
-
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
@@ -509,15 +487,6 @@ static int sst_write(struct mtd_info *mtd, loff_t to, size_t len,
pr_debug("%s: %s to 0x%08x, len %zd\n", dev_name(&flash->spi->dev),
__func__, (u32)to, len);
- *retlen = 0;
-
- /* sanity checks */
- if (!len)
- return 0;
-
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
spi_message_init(&m);
memset(t, 0, (sizeof t));
@@ -908,14 +877,14 @@ static int __devinit m25p_probe(struct spi_device *spi)
flash->mtd.writesize = 1;
flash->mtd.flags = MTD_CAP_NORFLASH;
flash->mtd.size = info->sector_size * info->n_sectors;
- flash->mtd.erase = m25p80_erase;
- flash->mtd.read = m25p80_read;
+ flash->mtd._erase = m25p80_erase;
+ flash->mtd._read = m25p80_read;
/* sst flash chips use AAI word program */
if (JEDEC_MFR(info->jedec_id) == CFI_MFR_SST)
- flash->mtd.write = sst_write;
+ flash->mtd._write = sst_write;
else
- flash->mtd.write = m25p80_write;
+ flash->mtd._write = m25p80_write;
/* prefer "small sector" erase if possible */
if (info->flags & SECT_4K) {
@@ -932,6 +901,7 @@ static int __devinit m25p_probe(struct spi_device *spi)
ppdata.of_node = spi->dev.of_node;
flash->mtd.dev.parent = &spi->dev;
flash->page_size = info->page_size;
+ flash->mtd.writebufsize = flash->page_size;
if (info->addr_width)
flash->addr_width = info->addr_width;
@@ -1004,21 +974,7 @@ static struct spi_driver m25p80_driver = {
*/
};
-
-static int __init m25p80_init(void)
-{
- return spi_register_driver(&m25p80_driver);
-}
-
-
-static void __exit m25p80_exit(void)
-{
- spi_unregister_driver(&m25p80_driver);
-}
-
-
-module_init(m25p80_init);
-module_exit(m25p80_exit);
+module_spi_driver(m25p80_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike Lavender");
diff --git a/drivers/mtd/devices/ms02-nv.c b/drivers/mtd/devices/ms02-nv.c
index 8423fb6d4f2..182849d39c6 100644
--- a/drivers/mtd/devices/ms02-nv.c
+++ b/drivers/mtd/devices/ms02-nv.c
@@ -59,12 +59,8 @@ static int ms02nv_read(struct mtd_info *mtd, loff_t from,
{
struct ms02nv_private *mp = mtd->priv;
- if (from + len > mtd->size)
- return -EINVAL;
-
memcpy(buf, mp->uaddr + from, len);
*retlen = len;
-
return 0;
}
@@ -73,12 +69,8 @@ static int ms02nv_write(struct mtd_info *mtd, loff_t to,
{
struct ms02nv_private *mp = mtd->priv;
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy(mp->uaddr + to, buf, len);
*retlen = len;
-
return 0;
}
@@ -215,8 +207,8 @@ static int __init ms02nv_init_one(ulong addr)
mtd->size = fixsize;
mtd->name = (char *)ms02nv_name;
mtd->owner = THIS_MODULE;
- mtd->read = ms02nv_read;
- mtd->write = ms02nv_write;
+ mtd->_read = ms02nv_read;
+ mtd->_write = ms02nv_write;
mtd->writesize = 1;
ret = -EIO;
diff --git a/drivers/mtd/devices/mtd_dataflash.c b/drivers/mtd/devices/mtd_dataflash.c
index 236057ead0d..928fb0e6d73 100644
--- a/drivers/mtd/devices/mtd_dataflash.c
+++ b/drivers/mtd/devices/mtd_dataflash.c
@@ -164,9 +164,6 @@ static int dataflash_erase(struct mtd_info *mtd, struct erase_info *instr)
dev_name(&spi->dev), (long long)instr->addr,
(long long)instr->len);
- /* Sanity checks */
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
div_u64_rem(instr->len, priv->page_size, &rem);
if (rem)
return -EINVAL;
@@ -252,14 +249,6 @@ static int dataflash_read(struct mtd_info *mtd, loff_t from, size_t len,
pr_debug("%s: read 0x%x..0x%x\n", dev_name(&priv->spi->dev),
(unsigned)from, (unsigned)(from + len));
- *retlen = 0;
-
- /* Sanity checks */
- if (!len)
- return 0;
- if (from + len > mtd->size)
- return -EINVAL;
-
/* Calculate flash page/byte address */
addr = (((unsigned)from / priv->page_size) << priv->page_offset)
+ ((unsigned)from % priv->page_size);
@@ -328,14 +317,6 @@ static int dataflash_write(struct mtd_info *mtd, loff_t to, size_t len,
pr_debug("%s: write 0x%x..0x%x\n",
dev_name(&spi->dev), (unsigned)to, (unsigned)(to + len));
- *retlen = 0;
-
- /* Sanity checks */
- if (!len)
- return 0;
- if ((to + len) > mtd->size)
- return -EINVAL;
-
spi_message_init(&msg);
x[0].tx_buf = command = priv->command;
@@ -490,8 +471,6 @@ static ssize_t otp_read(struct spi_device *spi, unsigned base,
if ((off + len) > 64)
len = 64 - off;
- if (len == 0)
- return len;
spi_message_init(&m);
@@ -611,16 +590,16 @@ static int dataflash_write_user_otp(struct mtd_info *mtd,
static char *otp_setup(struct mtd_info *device, char revision)
{
- device->get_fact_prot_info = dataflash_get_otp_info;
- device->read_fact_prot_reg = dataflash_read_fact_otp;
- device->get_user_prot_info = dataflash_get_otp_info;
- device->read_user_prot_reg = dataflash_read_user_otp;
+ device->_get_fact_prot_info = dataflash_get_otp_info;
+ device->_read_fact_prot_reg = dataflash_read_fact_otp;
+ device->_get_user_prot_info = dataflash_get_otp_info;
+ device->_read_user_prot_reg = dataflash_read_user_otp;
/* rev c parts (at45db321c and at45db1281 only!) use a
* different write procedure; not (yet?) implemented.
*/
if (revision > 'c')
- device->write_user_prot_reg = dataflash_write_user_otp;
+ device->_write_user_prot_reg = dataflash_write_user_otp;
return ", OTP";
}
@@ -672,9 +651,9 @@ add_dataflash_otp(struct spi_device *spi, char *name,
device->owner = THIS_MODULE;
device->type = MTD_DATAFLASH;
device->flags = MTD_WRITEABLE;
- device->erase = dataflash_erase;
- device->read = dataflash_read;
- device->write = dataflash_write;
+ device->_erase = dataflash_erase;
+ device->_read = dataflash_read;
+ device->_write = dataflash_write;
device->priv = priv;
device->dev.parent = &spi->dev;
@@ -946,18 +925,7 @@ static struct spi_driver dataflash_driver = {
/* FIXME: investigate suspend and resume... */
};
-static int __init dataflash_init(void)
-{
- return spi_register_driver(&dataflash_driver);
-}
-module_init(dataflash_init);
-
-static void __exit dataflash_exit(void)
-{
- spi_unregister_driver(&dataflash_driver);
-}
-module_exit(dataflash_exit);
-
+module_spi_driver(dataflash_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Andrew Victor, David Brownell");
diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index 2562689ba6b..ec59d65897f 100644
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -34,34 +34,23 @@ static struct mtd_info *mtd_info;
static int ram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
-
memset((char *)mtd->priv + instr->addr, 0xff, instr->len);
-
instr->state = MTD_ERASE_DONE;
mtd_erase_callback(instr);
-
return 0;
}
static int ram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
- /* can we return a physical address with this driver? */
- if (phys)
- return -EINVAL;
-
*virt = mtd->priv + from;
*retlen = len;
return 0;
}
-static void ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static int ram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
+ return 0;
}
/*
@@ -80,11 +69,7 @@ static unsigned long ram_get_unmapped_area(struct mtd_info *mtd,
static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, u_char *buf)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
memcpy(buf, mtd->priv + from, len);
-
*retlen = len;
return 0;
}
@@ -92,11 +77,7 @@ static int ram_read(struct mtd_info *mtd, loff_t from, size_t len,
static int ram_write(struct mtd_info *mtd, loff_t to, size_t len,
size_t *retlen, const u_char *buf)
{
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy((char *)mtd->priv + to, buf, len);
-
*retlen = len;
return 0;
}
@@ -126,12 +107,12 @@ int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
mtd->priv = mapped_address;
mtd->owner = THIS_MODULE;
- mtd->erase = ram_erase;
- mtd->point = ram_point;
- mtd->unpoint = ram_unpoint;
- mtd->get_unmapped_area = ram_get_unmapped_area;
- mtd->read = ram_read;
- mtd->write = ram_write;
+ mtd->_erase = ram_erase;
+ mtd->_point = ram_point;
+ mtd->_unpoint = ram_unpoint;
+ mtd->_get_unmapped_area = ram_get_unmapped_area;
+ mtd->_read = ram_read;
+ mtd->_write = ram_write;
if (mtd_device_register(mtd, NULL, 0))
return -EIO;
diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 23423bd00b0..67823de68db 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -33,45 +33,33 @@ struct phram_mtd_list {
static LIST_HEAD(phram_list);
-
static int phram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
u_char *start = mtd->priv;
- if (instr->addr + instr->len > mtd->size)
- return -EINVAL;
-
memset(start + instr->addr, 0xff, instr->len);
- /* This'll catch a few races. Free the thing before returning :)
+ /*
+ * This'll catch a few races. Free the thing before returning :)
* I don't feel at all ashamed. This kind of thing is possible anyway
* with flash, but unlikely.
*/
-
instr->state = MTD_ERASE_DONE;
-
mtd_erase_callback(instr);
-
return 0;
}
static int phram_point(struct mtd_info *mtd, loff_t from, size_t len,
size_t *retlen, void **virt, resource_size_t *phys)
{
- if (from + len > mtd->size)
- return -EINVAL;
-
- /* can we return a physical address with this driver? */
- if (phys)
- return -EINVAL;
-
*virt = mtd->priv + from;
*retlen = len;
return 0;
}
-static void phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static int phram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
+ return 0;
}
static int phram_read(struct mtd_info *mtd, loff_t from, size_t len,
@@ -79,14 +67,7 @@ static int phram_read(struct mtd_info *mtd, loff_t from, size_t len,
{
u_char *start = mtd->priv;
- if (from >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - from)
- len = mtd->size - from;
-
memcpy(buf, start + from, len);
-
*retlen = len;
return 0;
}
@@ -96,20 +77,11 @@ static int phram_write(struct mtd_info *mtd, loff_t to, size_t len,
{
u_char *start = mtd->priv;
- if (to >= mtd->size)
- return -EINVAL;
-
- if (len > mtd->size - to)
- len = mtd->size - to;
-
memcpy(start + to, buf, len);
-
*retlen = len;
return 0;
}
-
-
static void unregister_devices(void)
{
struct phram_mtd_list *this, *safe;
@@ -142,11 +114,11 @@ static int register_device(char *name, unsigned long start, unsigned long len)
new->mtd.name = name;
new->mtd.size = len;
new->mtd.flags = MTD_CAP_RAM;
- new->mtd.erase = phram_erase;
- new->mtd.point = phram_point;
- new->mtd.unpoint = phram_unpoint;
- new->mtd.read = phram_read;
- new->mtd.write = phram_write;
+ new->mtd._erase = phram_erase;
+ new->mtd._point = phram_point;
+ new->mtd._unpoint = phram_unpoint;
+ new->mtd._read = phram_read;
+ new->mtd._write = phram_write;
new->mtd.owner = THIS_MODULE;
new->mtd.type = MTD_RAM;
new->mtd.erasesize = PAGE_SIZE;
@@ -233,7 +205,17 @@ static inline void kill_final_newline(char *str)
return 1; \
} while (0)
-static int phram_setup(const char *val, struct kernel_param *kp)
+/*
+ * This shall contain the module parameter if any. It is of the form:
+ * - phram=<device>,<address>,<size> for module case
+ * - phram.phram=<device>,<address>,<size> for built-in case
+ * We leave 64 bytes for the device name, 12 for the address and 12 for the
+ * size.
+ * Example: phram.phram=rootfs,0xa0000000,512Mi
+ */
+static __initdata char phram_paramline[64+12+12];
+
+static int __init phram_setup(const char *val)
{
char buf[64+12+12], *str = buf;
char *token[3];
@@ -282,12 +264,28 @@ static int phram_setup(const char *val, struct kernel_param *kp)
return ret;
}
-module_param_call(phram, phram_setup, NULL, NULL, 000);
+static int __init phram_param_call(const char *val, struct kernel_param *kp)
+{
+ /*
+ * This function is always called before 'init_phram()', whether
+ * built-in or module.
+ */
+ if (strlen(val) >= sizeof(phram_paramline))
+ return -ENOSPC;
+ strcpy(phram_paramline, val);
+
+ return 0;
+}
+
+module_param_call(phram, phram_param_call, NULL, NULL, 000);
MODULE_PARM_DESC(phram, "Memory region to map. \"phram=<name>,<start>,<length>\"");
static int __init init_phram(void)
{
+ if (phram_paramline[0])
+ return phram_setup(phram_paramline);
+
return 0;
}
diff --git a/drivers/mtd/devices/pmc551.c b/drivers/mtd/devices/pmc551.c
index 5d53c5760a6..0c51b988e1f 100644
--- a/drivers/mtd/devices/pmc551.c
+++ b/drivers/mtd/devices/pmc551.c
@@ -94,12 +94,48 @@
#include <linux/ioctl.h>
#include <asm/io.h>
#include <linux/pci.h>
-
#include <linux/mtd/mtd.h>
-#include <linux/mtd/pmc551.h>
+
+#define PMC551_VERSION \
+ "Ramix PMC551 PCI Mezzanine Ram Driver. (C) 1999,2000 Nortel Networks.\n"
+
+#define PCI_VENDOR_ID_V3_SEMI 0x11b0
+#define PCI_DEVICE_ID_V3_SEMI_V370PDC 0x0200
+
+#define PMC551_PCI_MEM_MAP0 0x50
+#define PMC551_PCI_MEM_MAP1 0x54
+#define PMC551_PCI_MEM_MAP_MAP_ADDR_MASK 0x3ff00000
+#define PMC551_PCI_MEM_MAP_APERTURE_MASK 0x000000f0
+#define PMC551_PCI_MEM_MAP_REG_EN 0x00000002
+#define PMC551_PCI_MEM_MAP_ENABLE 0x00000001
+
+#define PMC551_SDRAM_MA 0x60
+#define PMC551_SDRAM_CMD 0x62
+#define PMC551_DRAM_CFG 0x64
+#define PMC551_SYS_CTRL_REG 0x78
+
+#define PMC551_DRAM_BLK0 0x68
+#define PMC551_DRAM_BLK1 0x6c
+#define PMC551_DRAM_BLK2 0x70
+#define PMC551_DRAM_BLK3 0x74
+#define PMC551_DRAM_BLK_GET_SIZE(x) (524288 << ((x >> 4) & 0x0f))
+#define PMC551_DRAM_BLK_SET_COL_MUX(x, v) (((x) & ~0x00007000) | (((v) & 0x7) << 12))
+#define PMC551_DRAM_BLK_SET_ROW_MUX(x, v) (((x) & ~0x00000f00) | (((v) & 0xf) << 8))
+
+struct mypriv {
+ struct pci_dev *dev;
+ u_char *start;
+ u32 base_map0;
+ u32 curr_map0;
+ u32 asize;
+ struct mtd_info *nextpmc551;
+};
static struct mtd_info *pmc551list;
+static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, void **virt, resource_size_t *phys);
+
static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
{
struct mypriv *priv = mtd->priv;
@@ -115,16 +151,6 @@ static int pmc551_erase(struct mtd_info *mtd, struct erase_info *instr)
#endif
end = instr->addr + instr->len - 1;
-
- /* Is it past the end? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_erase() out of bounds (%ld > %ld)\n",
- (long)end, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
eoff_hi = end & ~(priv->asize - 1);
soff_hi = instr->addr & ~(priv->asize - 1);
eoff_lo = end & (priv->asize - 1);
@@ -178,18 +204,6 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
printk(KERN_DEBUG "pmc551_point(%ld, %ld)\n", (long)from, (long)len);
#endif
- if (from + len > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_point() out of bounds (%ld > %ld)\n",
- (long)from + len, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
- /* can we return a physical address with this driver? */
- if (phys)
- return -EINVAL;
-
soff_hi = from & ~(priv->asize - 1);
soff_lo = from & (priv->asize - 1);
@@ -205,11 +219,12 @@ static int pmc551_point(struct mtd_info *mtd, loff_t from, size_t len,
return 0;
}
-static void pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static int pmc551_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
#ifdef CONFIG_MTD_PMC551_DEBUG
printk(KERN_DEBUG "pmc551_unpoint()\n");
#endif
+ return 0;
}
static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
@@ -228,16 +243,6 @@ static int pmc551_read(struct mtd_info *mtd, loff_t from, size_t len,
#endif
end = from + len - 1;
-
- /* Is it past the end? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_read() out of bounds (%ld > %ld)\n",
- (long)end, (long)mtd->size);
-#endif
- return -EINVAL;
- }
-
soff_hi = from & ~(priv->asize - 1);
eoff_hi = end & ~(priv->asize - 1);
soff_lo = from & (priv->asize - 1);
@@ -295,16 +300,6 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
#endif
end = to + len - 1;
- /* Is it past the end? or did the u32 wrap? */
- if (end > mtd->size) {
-#ifdef CONFIG_MTD_PMC551_DEBUG
- printk(KERN_DEBUG "pmc551_write() out of bounds (end: %ld, "
- "size: %ld, to: %ld)\n", (long)end, (long)mtd->size,
- (long)to);
-#endif
- return -EINVAL;
- }
-
soff_hi = to & ~(priv->asize - 1);
eoff_hi = end & ~(priv->asize - 1);
soff_lo = to & (priv->asize - 1);
@@ -358,7 +353,7 @@ static int pmc551_write(struct mtd_info *mtd, loff_t to, size_t len,
* mechanism
* returns the size of the memory region found.
*/
-static u32 fixup_pmc551(struct pci_dev *dev)
+static int fixup_pmc551(struct pci_dev *dev)
{
#ifdef CONFIG_MTD_PMC551_BUGFIX
u32 dram_data;
@@ -668,7 +663,7 @@ static int __init init_pmc551(void)
struct mypriv *priv;
int found = 0;
struct mtd_info *mtd;
- u32 length = 0;
+ int length = 0;
if (msize) {
msize = (1 << (ffs(msize) - 1)) << 20;
@@ -786,11 +781,11 @@ static int __init init_pmc551(void)
mtd->size = msize;
mtd->flags = MTD_CAP_RAM;
- mtd->erase = pmc551_erase;
- mtd->read = pmc551_read;
- mtd->write = pmc551_write;
- mtd->point = pmc551_point;
- mtd->unpoint = pmc551_unpoint;
+ mtd->_erase = pmc551_erase;
+ mtd->_read = pmc551_read;
+ mtd->_write = pmc551_write;
+ mtd->_point = pmc551_point;
+ mtd->_unpoint = pmc551_unpoint;
mtd->type = MTD_RAM;
mtd->name = "PMC551 RAM board";
mtd->erasesize = 0x10000;
diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c
index 288594163c2..8f52fc858e4 100644
--- a/drivers/mtd/devices/slram.c
+++ b/drivers/mtd/devices/slram.c
@@ -75,7 +75,7 @@ static slram_mtd_list_t *slram_mtdlist = NULL;
static int slram_erase(struct mtd_info *, struct erase_info *);
static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, void **,
resource_size_t *);
-static void slram_unpoint(struct mtd_info *, loff_t, size_t);
+static int slram_unpoint(struct mtd_info *, loff_t, size_t);
static int slram_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int slram_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
@@ -83,21 +83,13 @@ static int slram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
slram_priv_t *priv = mtd->priv;
- if (instr->addr + instr->len > mtd->size) {
- return(-EINVAL);
- }
-
memset(priv->start + instr->addr, 0xff, instr->len);
-
/* This'll catch a few races. Free the thing before returning :)
* I don't feel at all ashamed. This kind of thing is possible anyway
* with flash, but unlikely.
*/
-
instr->state = MTD_ERASE_DONE;
-
mtd_erase_callback(instr);
-
return(0);
}
@@ -106,20 +98,14 @@ static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
{
slram_priv_t *priv = mtd->priv;
- /* can we return a physical address with this driver? */
- if (phys)
- return -EINVAL;
-
- if (from + len > mtd->size)
- return -EINVAL;
-
*virt = priv->start + from;
*retlen = len;
return(0);
}
-static void slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
+static int slram_unpoint(struct mtd_info *mtd, loff_t from, size_t len)
{
+ return 0;
}
static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
@@ -127,14 +113,7 @@ static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
{
slram_priv_t *priv = mtd->priv;
- if (from > mtd->size)
- return -EINVAL;
-
- if (from + len > mtd->size)
- len = mtd->size - from;
-
memcpy(buf, priv->start + from, len);
-
*retlen = len;
return(0);
}
@@ -144,11 +123,7 @@ static int slram_write(struct mtd_info *mtd, loff_t to, size_t len,
{
slram_priv_t *priv = mtd->priv;
- if (to + len > mtd->size)
- return -EINVAL;
-
memcpy(priv->start + to, buf, len);
-
*retlen = len;
return(0);
}
@@ -199,11 +174,11 @@ static int register_device(char *name, unsigned long start, unsigned long length
(*curmtd)->mtdinfo->name = name;
(*curmtd)->mtdinfo->size = length;
(*curmtd)->mtdinfo->flags = MTD_CAP_RAM;
- (*curmtd)->mtdinfo->erase = slram_erase;
- (*curmtd)->mtdinfo->point = slram_point;
- (*curmtd)->mtdinfo->unpoint = slram_unpoint;
- (*curmtd)->mtdinfo->read = slram_read;
- (*curmtd)->mtdinfo->write = slram_write;
+ (*curmtd)->mtdinfo->_erase = slram_erase;
+ (*curmtd)->mtdinfo->_point = slram_point;
+ (*curmtd)->mtdinfo->_unpoint = slram_unpoint;
+ (*curmtd)->mtdinfo->_read = slram_read;
+ (*curmtd)->mtdinfo->_write = slram_write;
(*curmtd)->mtdinfo->owner = THIS_MODULE;
(*curmtd)->mtdinfo->type = MTD_RAM;
(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
new file mode 100644
index 00000000000..797d43cd355
--- /dev/null
+++ b/drivers/mtd/devices/spear_smi.c
@@ -0,0 +1,1147 @@
+/*
+ * SMI (Serial Memory Controller) device driver for Serial NOR Flash on
+ * SPEAr platform
+ * The serial nor interface is largely based on drivers/mtd/m25p80.c,
+ * however the SPI interface has been replaced by SMI.
+ *
+ * Copyright © 2010 STMicroelectronics.
+ * Ashish Priyadarshi
+ * Shiraz Hashim <shiraz.hashim@st.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/param.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/spear_smi.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+/* SMI clock rate */
+#define SMI_MAX_CLOCK_FREQ 50000000 /* 50 MHz */
+
+/* MAX time out to safely come out of a erase or write busy conditions */
+#define SMI_PROBE_TIMEOUT (HZ / 10)
+#define SMI_MAX_TIME_OUT (3 * HZ)
+
+/* timeout for command completion */
+#define SMI_CMD_TIMEOUT (HZ / 10)
+
+/* registers of smi */
+#define SMI_CR1 0x0 /* SMI control register 1 */
+#define SMI_CR2 0x4 /* SMI control register 2 */
+#define SMI_SR 0x8 /* SMI status register */
+#define SMI_TR 0xC /* SMI transmit register */
+#define SMI_RR 0x10 /* SMI receive register */
+
+/* defines for control_reg 1 */
+#define BANK_EN (0xF << 0) /* enables all banks */
+#define DSEL_TIME (0x6 << 4) /* Deselect time 6 + 1 SMI_CK periods */
+#define SW_MODE (0x1 << 28) /* enables SW Mode */
+#define WB_MODE (0x1 << 29) /* Write Burst Mode */
+#define FAST_MODE (0x1 << 15) /* Fast Mode */
+#define HOLD1 (0x1 << 16) /* Clock Hold period selection */
+
+/* defines for control_reg 2 */
+#define SEND (0x1 << 7) /* Send data */
+#define TFIE (0x1 << 8) /* Transmission Flag Interrupt Enable */
+#define WCIE (0x1 << 9) /* Write Complete Interrupt Enable */
+#define RD_STATUS_REG (0x1 << 10) /* reads status reg */
+#define WE (0x1 << 11) /* Write Enable */
+
+#define TX_LEN_SHIFT 0
+#define RX_LEN_SHIFT 4
+#define BANK_SHIFT 12
+
+/* defines for status register */
+#define SR_WIP 0x1 /* Write in progress */
+#define SR_WEL 0x2 /* Write enable latch */
+#define SR_BP0 0x4 /* Block protect 0 */
+#define SR_BP1 0x8 /* Block protect 1 */
+#define SR_BP2 0x10 /* Block protect 2 */
+#define SR_SRWD 0x80 /* SR write protect */
+#define TFF 0x100 /* Transfer Finished Flag */
+#define WCF 0x200 /* Transfer Finished Flag */
+#define ERF1 0x400 /* Forbidden Write Request */
+#define ERF2 0x800 /* Forbidden Access */
+
+#define WM_SHIFT 12
+
+/* flash opcodes */
+#define OPCODE_RDID 0x9f /* Read JEDEC ID */
+
+/* Flash Device Ids maintenance section */
+
+/* data structure to maintain flash ids from different vendors */
+struct flash_device {
+ char *name;
+ u8 erase_cmd;
+ u32 device_id;
+ u32 pagesize;
+ unsigned long sectorsize;
+ unsigned long size_in_bytes;
+};
+
+#define FLASH_ID(n, es, id, psize, ssize, size) \
+{ \
+ .name = n, \
+ .erase_cmd = es, \
+ .device_id = id, \
+ .pagesize = psize, \
+ .sectorsize = ssize, \
+ .size_in_bytes = size \
+}
+
+static struct flash_device flash_devices[] = {
+ FLASH_ID("st m25p16" , 0xd8, 0x00152020, 0x100, 0x10000, 0x200000),
+ FLASH_ID("st m25p32" , 0xd8, 0x00162020, 0x100, 0x10000, 0x400000),
+ FLASH_ID("st m25p64" , 0xd8, 0x00172020, 0x100, 0x10000, 0x800000),
+ FLASH_ID("st m25p128" , 0xd8, 0x00182020, 0x100, 0x40000, 0x1000000),
+ FLASH_ID("st m25p05" , 0xd8, 0x00102020, 0x80 , 0x8000 , 0x10000),
+ FLASH_ID("st m25p10" , 0xd8, 0x00112020, 0x80 , 0x8000 , 0x20000),
+ FLASH_ID("st m25p20" , 0xd8, 0x00122020, 0x100, 0x10000, 0x40000),
+ FLASH_ID("st m25p40" , 0xd8, 0x00132020, 0x100, 0x10000, 0x80000),
+ FLASH_ID("st m25p80" , 0xd8, 0x00142020, 0x100, 0x10000, 0x100000),
+ FLASH_ID("st m45pe10" , 0xd8, 0x00114020, 0x100, 0x10000, 0x20000),
+ FLASH_ID("st m45pe20" , 0xd8, 0x00124020, 0x100, 0x10000, 0x40000),
+ FLASH_ID("st m45pe40" , 0xd8, 0x00134020, 0x100, 0x10000, 0x80000),
+ FLASH_ID("st m45pe80" , 0xd8, 0x00144020, 0x100, 0x10000, 0x100000),
+ FLASH_ID("sp s25fl004" , 0xd8, 0x00120201, 0x100, 0x10000, 0x80000),
+ FLASH_ID("sp s25fl008" , 0xd8, 0x00130201, 0x100, 0x10000, 0x100000),
+ FLASH_ID("sp s25fl016" , 0xd8, 0x00140201, 0x100, 0x10000, 0x200000),
+ FLASH_ID("sp s25fl032" , 0xd8, 0x00150201, 0x100, 0x10000, 0x400000),
+ FLASH_ID("sp s25fl064" , 0xd8, 0x00160201, 0x100, 0x10000, 0x800000),
+ FLASH_ID("atmel 25f512" , 0x52, 0x0065001F, 0x80 , 0x8000 , 0x10000),
+ FLASH_ID("atmel 25f1024" , 0x52, 0x0060001F, 0x100, 0x8000 , 0x20000),
+ FLASH_ID("atmel 25f2048" , 0x52, 0x0063001F, 0x100, 0x10000, 0x40000),
+ FLASH_ID("atmel 25f4096" , 0x52, 0x0064001F, 0x100, 0x10000, 0x80000),
+ FLASH_ID("atmel 25fs040" , 0xd7, 0x0004661F, 0x100, 0x10000, 0x80000),
+ FLASH_ID("mac 25l512" , 0xd8, 0x001020C2, 0x010, 0x10000, 0x10000),
+ FLASH_ID("mac 25l1005" , 0xd8, 0x001120C2, 0x010, 0x10000, 0x20000),
+ FLASH_ID("mac 25l2005" , 0xd8, 0x001220C2, 0x010, 0x10000, 0x40000),
+ FLASH_ID("mac 25l4005" , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
+ FLASH_ID("mac 25l4005a" , 0xd8, 0x001320C2, 0x010, 0x10000, 0x80000),
+ FLASH_ID("mac 25l8005" , 0xd8, 0x001420C2, 0x010, 0x10000, 0x100000),
+ FLASH_ID("mac 25l1605" , 0xd8, 0x001520C2, 0x100, 0x10000, 0x200000),
+ FLASH_ID("mac 25l1605a" , 0xd8, 0x001520C2, 0x010, 0x10000, 0x200000),
+ FLASH_ID("mac 25l3205" , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
+ FLASH_ID("mac 25l3205a" , 0xd8, 0x001620C2, 0x100, 0x10000, 0x400000),
+ FLASH_ID("mac 25l6405" , 0xd8, 0x001720C2, 0x100, 0x10000, 0x800000),
+};
+
+/* Define spear specific structures */
+
+struct spear_snor_flash;
+
+/**
+ * struct spear_smi - Structure for SMI Device
+ *
+ * @clk: functional clock
+ * @status: current status register of SMI.
+ * @clk_rate: functional clock rate of SMI (default: SMI_MAX_CLOCK_FREQ)
+ * @lock: lock to prevent parallel access of SMI.
+ * @io_base: base address for registers of SMI.
+ * @pdev: platform device
+ * @cmd_complete: queue to wait for command completion of NOR-flash.
+ * @num_flashes: number of flashes actually present on board.
+ * @flash: separate structure for each Serial NOR-flash attached to SMI.
+ */
+struct spear_smi {
+ struct clk *clk;
+ u32 status;
+ unsigned long clk_rate;
+ struct mutex lock;
+ void __iomem *io_base;
+ struct platform_device *pdev;
+ wait_queue_head_t cmd_complete;
+ u32 num_flashes;
+ struct spear_snor_flash *flash[MAX_NUM_FLASH_CHIP];
+};
+
+/**
+ * struct spear_snor_flash - Structure for Serial NOR Flash
+ *
+ * @bank: Bank number(0, 1, 2, 3) for each NOR-flash.
+ * @dev_id: Device ID of NOR-flash.
+ * @lock: lock to manage flash read, write and erase operations
+ * @mtd: MTD info for each NOR-flash.
+ * @num_parts: Total number of partition in each bank of NOR-flash.
+ * @parts: Partition info for each bank of NOR-flash.
+ * @page_size: Page size of NOR-flash.
+ * @base_addr: Base address of NOR-flash.
+ * @erase_cmd: erase command may vary on different flash types
+ * @fast_mode: flash supports read in fast mode
+ */
+struct spear_snor_flash {
+ u32 bank;
+ u32 dev_id;
+ struct mutex lock;
+ struct mtd_info mtd;
+ u32 num_parts;
+ struct mtd_partition *parts;
+ u32 page_size;
+ void __iomem *base_addr;
+ u8 erase_cmd;
+ u8 fast_mode;
+};
+
+static inline struct spear_snor_flash *get_flash_data(struct mtd_info *mtd)
+{
+ return container_of(mtd, struct spear_snor_flash, mtd);
+}
+
+/**
+ * spear_smi_read_sr - Read status register of flash through SMI
+ * @dev: structure of SMI information.
+ * @bank: bank to which flash is connected
+ *
+ * This routine will return the status register of the flash chip present at the
+ * given bank.
+ */
+static int spear_smi_read_sr(struct spear_smi *dev, u32 bank)
+{
+ int ret;
+ u32 ctrlreg1;
+
+ mutex_lock(&dev->lock);
+ dev->status = 0; /* Will be set in interrupt handler */
+
+ ctrlreg1 = readl(dev->io_base + SMI_CR1);
+ /* program smi in hw mode */
+ writel(ctrlreg1 & ~(SW_MODE | WB_MODE), dev->io_base + SMI_CR1);
+
+ /* performing a rsr instruction in hw mode */
+ writel((bank << BANK_SHIFT) | RD_STATUS_REG | TFIE,
+ dev->io_base + SMI_CR2);
+
+ /* wait for tff */
+ ret = wait_event_interruptible_timeout(dev->cmd_complete,
+ dev->status & TFF, SMI_CMD_TIMEOUT);
+
+ /* copy dev->status (lower 16 bits) in order to release lock */
+ if (ret > 0)
+ ret = dev->status & 0xffff;
+ else
+ ret = -EIO;
+
+ /* restore the ctrl regs state */
+ writel(ctrlreg1, dev->io_base + SMI_CR1);
+ writel(0, dev->io_base + SMI_CR2);
+ mutex_unlock(&dev->lock);
+
+ return ret;
+}
+
+/**
+ * spear_smi_wait_till_ready - wait till flash is ready
+ * @dev: structure of SMI information.
+ * @bank: flash corresponding to this bank
+ * @timeout: timeout for busy wait condition
+ *
+ * This routine checks for WIP (write in progress) bit in Status register
+ * If successful the routine returns 0 else -EBUSY
+ */
+static int spear_smi_wait_till_ready(struct spear_smi *dev, u32 bank,
+ unsigned long timeout)
+{
+ unsigned long finish;
+ int status;
+
+ finish = jiffies + timeout;
+ do {
+ status = spear_smi_read_sr(dev, bank);
+ if (status < 0)
+ continue; /* try till timeout */
+ else if (!(status & SR_WIP))
+ return 0;
+
+ cond_resched();
+ } while (!time_after_eq(jiffies, finish));
+
+ dev_err(&dev->pdev->dev, "smi controller is busy, timeout\n");
+ return status;
+}
+
+/**
+ * spear_smi_int_handler - SMI Interrupt Handler.
+ * @irq: irq number
+ * @dev_id: structure of SMI device, embedded in dev_id.
+ *
+ * The handler clears all interrupt conditions and records the status in
+ * dev->status which is used by the driver later.
+ */
+static irqreturn_t spear_smi_int_handler(int irq, void *dev_id)
+{
+ u32 status = 0;
+ struct spear_smi *dev = dev_id;
+
+ status = readl(dev->io_base + SMI_SR);
+
+ if (unlikely(!status))
+ return IRQ_NONE;
+
+ /* clear all interrupt conditions */
+ writel(0, dev->io_base + SMI_SR);
+
+ /* copy the status register in dev->status */
+ dev->status |= status;
+
+ /* send the completion */
+ wake_up_interruptible(&dev->cmd_complete);
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * spear_smi_hw_init - initializes the smi controller.
+ * @dev: structure of smi device
+ *
+ * this routine initializes the smi controller wit the default values
+ */
+static void spear_smi_hw_init(struct spear_smi *dev)
+{
+ unsigned long rate = 0;
+ u32 prescale = 0;
+ u32 val;
+
+ rate = clk_get_rate(dev->clk);
+
+ /* functional clock of smi */
+ prescale = DIV_ROUND_UP(rate, dev->clk_rate);
+
+ /*
+ * setting the standard values, fast mode, prescaler for
+ * SMI_MAX_CLOCK_FREQ (50MHz) operation and bank enable
+ */
+ val = HOLD1 | BANK_EN | DSEL_TIME | (prescale << 8);
+
+ mutex_lock(&dev->lock);
+ writel(val, dev->io_base + SMI_CR1);
+ mutex_unlock(&dev->lock);
+}
+
+/**
+ * get_flash_index - match chip id from a flash list.
+ * @flash_id: a valid nor flash chip id obtained from board.
+ *
+ * try to validate the chip id by matching from a list, if not found then simply
+ * returns negative. In case of success returns index in to the flash devices
+ * array.
+ */
+static int get_flash_index(u32 flash_id)
+{
+ int index;
+
+ /* Matches chip-id to entire list of 'serial-nor flash' ids */
+ for (index = 0; index < ARRAY_SIZE(flash_devices); index++) {
+ if (flash_devices[index].device_id == flash_id)
+ return index;
+ }
+
+ /* Memory chip is not listed and not supported */
+ return -ENODEV;
+}
+
+/**
+ * spear_smi_write_enable - Enable the flash to do write operation
+ * @dev: structure of SMI device
+ * @bank: enable write for flash connected to this bank
+ *
+ * Set write enable latch with Write Enable command.
+ * Returns 0 on success.
+ */
+static int spear_smi_write_enable(struct spear_smi *dev, u32 bank)
+{
+ int ret;
+ u32 ctrlreg1;
+
+ mutex_lock(&dev->lock);
+ dev->status = 0; /* Will be set in interrupt handler */
+
+ ctrlreg1 = readl(dev->io_base + SMI_CR1);
+ /* program smi in h/w mode */
+ writel(ctrlreg1 & ~SW_MODE, dev->io_base + SMI_CR1);
+
+ /* give the flash, write enable command */
+ writel((bank << BANK_SHIFT) | WE | TFIE, dev->io_base + SMI_CR2);
+
+ ret = wait_event_interruptible_timeout(dev->cmd_complete,
+ dev->status & TFF, SMI_CMD_TIMEOUT);
+
+ /* restore the ctrl regs state */
+ writel(ctrlreg1, dev->io_base + SMI_CR1);
+ writel(0, dev->io_base + SMI_CR2);
+
+ if (ret <= 0) {
+ ret = -EIO;
+ dev_err(&dev->pdev->dev,
+ "smi controller failed on write enable\n");
+ } else {
+ /* check whether write mode status is set for required bank */
+ if (dev->status & (1 << (bank + WM_SHIFT)))
+ ret = 0;
+ else {
+ dev_err(&dev->pdev->dev, "couldn't enable write\n");
+ ret = -EIO;
+ }
+ }
+
+ mutex_unlock(&dev->lock);
+ return ret;
+}
+
+static inline u32
+get_sector_erase_cmd(struct spear_snor_flash *flash, u32 offset)
+{
+ u32 cmd;
+ u8 *x = (u8 *)&cmd;
+
+ x[0] = flash->erase_cmd;
+ x[1] = offset >> 16;
+ x[2] = offset >> 8;
+ x[3] = offset;
+
+ return cmd;
+}
+
+/**
+ * spear_smi_erase_sector - erase one sector of flash
+ * @dev: structure of SMI information
+ * @command: erase command to be send
+ * @bank: bank to which this command needs to be send
+ * @bytes: size of command
+ *
+ * Erase one sector of flash memory at offset ``offset'' which is any
+ * address within the sector which should be erased.
+ * Returns 0 if successful, non-zero otherwise.
+ */
+static int spear_smi_erase_sector(struct spear_smi *dev,
+ u32 bank, u32 command, u32 bytes)
+{
+ u32 ctrlreg1 = 0;
+ int ret;
+
+ ret = spear_smi_wait_till_ready(dev, bank, SMI_MAX_TIME_OUT);
+ if (ret)
+ return ret;
+
+ ret = spear_smi_write_enable(dev, bank);
+ if (ret)
+ return ret;
+
+ mutex_lock(&dev->lock);
+
+ ctrlreg1 = readl(dev->io_base + SMI_CR1);
+ writel((ctrlreg1 | SW_MODE) & ~WB_MODE, dev->io_base + SMI_CR1);
+
+ /* send command in sw mode */
+ writel(command, dev->io_base + SMI_TR);
+
+ writel((bank << BANK_SHIFT) | SEND | TFIE | (bytes << TX_LEN_SHIFT),
+ dev->io_base + SMI_CR2);
+
+ ret = wait_event_interruptible_timeout(dev->cmd_complete,
+ dev->status & TFF, SMI_CMD_TIMEOUT);
+
+ if (ret <= 0) {
+ ret = -EIO;
+ dev_err(&dev->pdev->dev, "sector erase failed\n");
+ } else
+ ret = 0; /* success */
+
+ /* restore ctrl regs */
+ writel(ctrlreg1, dev->io_base + SMI_CR1);
+ writel(0, dev->io_base + SMI_CR2);
+
+ mutex_unlock(&dev->lock);
+ return ret;
+}
+
+/**
+ * spear_mtd_erase - perform flash erase operation as requested by user
+ * @mtd: Provides the memory characteristics
+ * @e_info: Provides the erase information
+ *
+ * Erase an address range on the flash chip. The address range may extend
+ * one or more erase sectors. Return an error is there is a problem erasing.
+ */
+static int spear_mtd_erase(struct mtd_info *mtd, struct erase_info *e_info)
+{
+ struct spear_snor_flash *flash = get_flash_data(mtd);
+ struct spear_smi *dev = mtd->priv;
+ u32 addr, command, bank;
+ int len, ret;
+
+ if (!flash || !dev)
+ return -ENODEV;
+
+ bank = flash->bank;
+ if (bank > dev->num_flashes - 1) {
+ dev_err(&dev->pdev->dev, "Invalid Bank Num");
+ return -EINVAL;
+ }
+
+ addr = e_info->addr;
+ len = e_info->len;
+
+ mutex_lock(&flash->lock);
+
+ /* now erase sectors in loop */
+ while (len) {
+ command = get_sector_erase_cmd(flash, addr);
+ /* preparing the command for flash */
+ ret = spear_smi_erase_sector(dev, bank, command, 4);
+ if (ret) {
+ e_info->state = MTD_ERASE_FAILED;
+ mutex_unlock(&flash->lock);
+ return ret;
+ }
+ addr += mtd->erasesize;
+ len -= mtd->erasesize;
+ }
+
+ mutex_unlock(&flash->lock);
+ e_info->state = MTD_ERASE_DONE;
+ mtd_erase_callback(e_info);
+
+ return 0;
+}
+
+/**
+ * spear_mtd_read - performs flash read operation as requested by the user
+ * @mtd: MTD information of the memory bank
+ * @from: Address from which to start read
+ * @len: Number of bytes to be read
+ * @retlen: Fills the Number of bytes actually read
+ * @buf: Fills this after reading
+ *
+ * Read an address range from the flash chip. The address range
+ * may be any size provided it is within the physical boundaries.
+ * Returns 0 on success, non zero otherwise
+ */
+static int spear_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u8 *buf)
+{
+ struct spear_snor_flash *flash = get_flash_data(mtd);
+ struct spear_smi *dev = mtd->priv;
+ void *src;
+ u32 ctrlreg1, val;
+ int ret;
+
+ if (!flash || !dev)
+ return -ENODEV;
+
+ if (flash->bank > dev->num_flashes - 1) {
+ dev_err(&dev->pdev->dev, "Invalid Bank Num");
+ return -EINVAL;
+ }
+
+ /* select address as per bank number */
+ src = flash->base_addr + from;
+
+ mutex_lock(&flash->lock);
+
+ /* wait till previous write/erase is done. */
+ ret = spear_smi_wait_till_ready(dev, flash->bank, SMI_MAX_TIME_OUT);
+ if (ret) {
+ mutex_unlock(&flash->lock);
+ return ret;
+ }
+
+ mutex_lock(&dev->lock);
+ /* put smi in hw mode not wbt mode */
+ ctrlreg1 = val = readl(dev->io_base + SMI_CR1);
+ val &= ~(SW_MODE | WB_MODE);
+ if (flash->fast_mode)
+ val |= FAST_MODE;
+
+ writel(val, dev->io_base + SMI_CR1);
+
+ memcpy_fromio(buf, (u8 *)src, len);
+
+ /* restore ctrl reg1 */
+ writel(ctrlreg1, dev->io_base + SMI_CR1);
+ mutex_unlock(&dev->lock);
+
+ *retlen = len;
+ mutex_unlock(&flash->lock);
+
+ return 0;
+}
+
+static inline int spear_smi_cpy_toio(struct spear_smi *dev, u32 bank,
+ void *dest, const void *src, size_t len)
+{
+ int ret;
+ u32 ctrlreg1;
+
+ /* wait until finished previous write command. */
+ ret = spear_smi_wait_till_ready(dev, bank, SMI_MAX_TIME_OUT);
+ if (ret)
+ return ret;
+
+ /* put smi in write enable */
+ ret = spear_smi_write_enable(dev, bank);
+ if (ret)
+ return ret;
+
+ /* put smi in hw, write burst mode */
+ mutex_lock(&dev->lock);
+
+ ctrlreg1 = readl(dev->io_base + SMI_CR1);
+ writel((ctrlreg1 | WB_MODE) & ~SW_MODE, dev->io_base + SMI_CR1);
+
+ memcpy_toio(dest, src, len);
+
+ writel(ctrlreg1, dev->io_base + SMI_CR1);
+
+ mutex_unlock(&dev->lock);
+ return 0;
+}
+
+/**
+ * spear_mtd_write - performs write operation as requested by the user.
+ * @mtd: MTD information of the memory bank.
+ * @to: Address to write.
+ * @len: Number of bytes to be written.
+ * @retlen: Number of bytes actually wrote.
+ * @buf: Buffer from which the data to be taken.
+ *
+ * Write an address range to the flash chip. Data must be written in
+ * flash_page_size chunks. The address range may be any size provided
+ * it is within the physical boundaries.
+ * Returns 0 on success, non zero otherwise
+ */
+static int spear_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u8 *buf)
+{
+ struct spear_snor_flash *flash = get_flash_data(mtd);
+ struct spear_smi *dev = mtd->priv;
+ void *dest;
+ u32 page_offset, page_size;
+ int ret;
+
+ if (!flash || !dev)
+ return -ENODEV;
+
+ if (flash->bank > dev->num_flashes - 1) {
+ dev_err(&dev->pdev->dev, "Invalid Bank Num");
+ return -EINVAL;
+ }
+
+ /* select address as per bank number */
+ dest = flash->base_addr + to;
+ mutex_lock(&flash->lock);
+
+ page_offset = (u32)to % flash->page_size;
+
+ /* do if all the bytes fit onto one page */
+ if (page_offset + len <= flash->page_size) {
+ ret = spear_smi_cpy_toio(dev, flash->bank, dest, buf, len);
+ if (!ret)
+ *retlen += len;
+ } else {
+ u32 i;
+
+ /* the size of data remaining on the first page */
+ page_size = flash->page_size - page_offset;
+
+ ret = spear_smi_cpy_toio(dev, flash->bank, dest, buf,
+ page_size);
+ if (ret)
+ goto err_write;
+ else
+ *retlen += page_size;
+
+ /* write everything in pagesize chunks */
+ for (i = page_size; i < len; i += page_size) {
+ page_size = len - i;
+ if (page_size > flash->page_size)
+ page_size = flash->page_size;
+
+ ret = spear_smi_cpy_toio(dev, flash->bank, dest + i,
+ buf + i, page_size);
+ if (ret)
+ break;
+ else
+ *retlen += page_size;
+ }
+ }
+
+err_write:
+ mutex_unlock(&flash->lock);
+
+ return ret;
+}
+
+/**
+ * spear_smi_probe_flash - Detects the NOR Flash chip.
+ * @dev: structure of SMI information.
+ * @bank: bank on which flash must be probed
+ *
+ * This routine will check whether there exists a flash chip on a given memory
+ * bank ID.
+ * Return index of the probed flash in flash devices structure
+ */
+static int spear_smi_probe_flash(struct spear_smi *dev, u32 bank)
+{
+ int ret;
+ u32 val = 0;
+
+ ret = spear_smi_wait_till_ready(dev, bank, SMI_PROBE_TIMEOUT);
+ if (ret)
+ return ret;
+
+ mutex_lock(&dev->lock);
+
+ dev->status = 0; /* Will be set in interrupt handler */
+ /* put smi in sw mode */
+ val = readl(dev->io_base + SMI_CR1);
+ writel(val | SW_MODE, dev->io_base + SMI_CR1);
+
+ /* send readid command in sw mode */
+ writel(OPCODE_RDID, dev->io_base + SMI_TR);
+
+ val = (bank << BANK_SHIFT) | SEND | (1 << TX_LEN_SHIFT) |
+ (3 << RX_LEN_SHIFT) | TFIE;
+ writel(val, dev->io_base + SMI_CR2);
+
+ /* wait for TFF */
+ ret = wait_event_interruptible_timeout(dev->cmd_complete,
+ dev->status & TFF, SMI_CMD_TIMEOUT);
+ if (ret <= 0) {
+ ret = -ENODEV;
+ goto err_probe;
+ }
+
+ /* get memory chip id */
+ val = readl(dev->io_base + SMI_RR);
+ val &= 0x00ffffff;
+ ret = get_flash_index(val);
+
+err_probe:
+ /* clear sw mode */
+ val = readl(dev->io_base + SMI_CR1);
+ writel(val & ~SW_MODE, dev->io_base + SMI_CR1);
+
+ mutex_unlock(&dev->lock);
+ return ret;
+}
+
+
+#ifdef CONFIG_OF
+static int __devinit spear_smi_probe_config_dt(struct platform_device *pdev,
+ struct device_node *np)
+{
+ struct spear_smi_plat_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device_node *pp = NULL;
+ const __be32 *addr;
+ u32 val;
+ int len;
+ int i = 0;
+
+ if (!np)
+ return -ENODEV;
+
+ of_property_read_u32(np, "clock-rate", &val);
+ pdata->clk_rate = val;
+
+ pdata->board_flash_info = devm_kzalloc(&pdev->dev,
+ sizeof(*pdata->board_flash_info),
+ GFP_KERNEL);
+
+ /* Fill structs for each subnode (flash device) */
+ while ((pp = of_get_next_child(np, pp))) {
+ struct spear_smi_flash_info *flash_info;
+
+ flash_info = &pdata->board_flash_info[i];
+ pdata->np[i] = pp;
+
+ /* Read base-addr and size from DT */
+ addr = of_get_property(pp, "reg", &len);
+ pdata->board_flash_info->mem_base = be32_to_cpup(&addr[0]);
+ pdata->board_flash_info->size = be32_to_cpup(&addr[1]);
+
+ if (of_get_property(pp, "st,smi-fast-mode", NULL))
+ pdata->board_flash_info->fast_mode = 1;
+
+ i++;
+ }
+
+ pdata->num_flashes = i;
+
+ return 0;
+}
+#else
+static int __devinit spear_smi_probe_config_dt(struct platform_device *pdev,
+ struct device_node *np)
+{
+ return -ENOSYS;
+}
+#endif
+
+static int spear_smi_setup_banks(struct platform_device *pdev,
+ u32 bank, struct device_node *np)
+{
+ struct spear_smi *dev = platform_get_drvdata(pdev);
+ struct mtd_part_parser_data ppdata = {};
+ struct spear_smi_flash_info *flash_info;
+ struct spear_smi_plat_data *pdata;
+ struct spear_snor_flash *flash;
+ struct mtd_partition *parts = NULL;
+ int count = 0;
+ int flash_index;
+ int ret = 0;
+
+ pdata = dev_get_platdata(&pdev->dev);
+ if (bank > pdata->num_flashes - 1)
+ return -EINVAL;
+
+ flash_info = &pdata->board_flash_info[bank];
+ if (!flash_info)
+ return -ENODEV;
+
+ flash = kzalloc(sizeof(*flash), GFP_ATOMIC);
+ if (!flash)
+ return -ENOMEM;
+ flash->bank = bank;
+ flash->fast_mode = flash_info->fast_mode ? 1 : 0;
+ mutex_init(&flash->lock);
+
+ /* verify whether nor flash is really present on board */
+ flash_index = spear_smi_probe_flash(dev, bank);
+ if (flash_index < 0) {
+ dev_info(&dev->pdev->dev, "smi-nor%d not found\n", bank);
+ ret = flash_index;
+ goto err_probe;
+ }
+ /* map the memory for nor flash chip */
+ flash->base_addr = ioremap(flash_info->mem_base, flash_info->size);
+ if (!flash->base_addr) {
+ ret = -EIO;
+ goto err_probe;
+ }
+
+ dev->flash[bank] = flash;
+ flash->mtd.priv = dev;
+
+ if (flash_info->name)
+ flash->mtd.name = flash_info->name;
+ else
+ flash->mtd.name = flash_devices[flash_index].name;
+
+ flash->mtd.type = MTD_NORFLASH;
+ flash->mtd.writesize = 1;
+ flash->mtd.flags = MTD_CAP_NORFLASH;
+ flash->mtd.size = flash_info->size;
+ flash->mtd.erasesize = flash_devices[flash_index].sectorsize;
+ flash->page_size = flash_devices[flash_index].pagesize;
+ flash->mtd.writebufsize = flash->page_size;
+ flash->erase_cmd = flash_devices[flash_index].erase_cmd;
+ flash->mtd._erase = spear_mtd_erase;
+ flash->mtd._read = spear_mtd_read;
+ flash->mtd._write = spear_mtd_write;
+ flash->dev_id = flash_devices[flash_index].device_id;
+
+ dev_info(&dev->pdev->dev, "mtd .name=%s .size=%llx(%lluM)\n",
+ flash->mtd.name, flash->mtd.size,
+ flash->mtd.size / (1024 * 1024));
+
+ dev_info(&dev->pdev->dev, ".erasesize = 0x%x(%uK)\n",
+ flash->mtd.erasesize, flash->mtd.erasesize / 1024);
+
+#ifndef CONFIG_OF
+ if (flash_info->partitions) {
+ parts = flash_info->partitions;
+ count = flash_info->nr_partitions;
+ }
+#endif
+ ppdata.of_node = np;
+
+ ret = mtd_device_parse_register(&flash->mtd, NULL, &ppdata, parts,
+ count);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "Err MTD partition=%d\n", ret);
+ goto err_map;
+ }
+
+ return 0;
+
+err_map:
+ iounmap(flash->base_addr);
+
+err_probe:
+ kfree(flash);
+ return ret;
+}
+
+/**
+ * spear_smi_probe - Entry routine
+ * @pdev: platform device structure
+ *
+ * This is the first routine which gets invoked during booting and does all
+ * initialization/allocation work. The routine looks for available memory banks,
+ * and do proper init for any found one.
+ * Returns 0 on success, non zero otherwise
+ */
+static int __devinit spear_smi_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct spear_smi_plat_data *pdata = NULL;
+ struct spear_smi *dev;
+ struct resource *smi_base;
+ int irq, ret = 0;
+ int i;
+
+ if (np) {
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ pr_err("%s: ERROR: no memory", __func__);
+ ret = -ENOMEM;
+ goto err;
+ }
+ pdev->dev.platform_data = pdata;
+ ret = spear_smi_probe_config_dt(pdev, np);
+ if (ret) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "no platform data\n");
+ goto err;
+ }
+ } else {
+ pdata = dev_get_platdata(&pdev->dev);
+ if (pdata < 0) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "no platform data\n");
+ goto err;
+ }
+ }
+
+ smi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!smi_base) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "invalid smi base address\n");
+ goto err;
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "invalid smi irq\n");
+ goto err;
+ }
+
+ dev = kzalloc(sizeof(*dev), GFP_ATOMIC);
+ if (!dev) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "mem alloc fail\n");
+ goto err;
+ }
+
+ smi_base = request_mem_region(smi_base->start, resource_size(smi_base),
+ pdev->name);
+ if (!smi_base) {
+ ret = -EBUSY;
+ dev_err(&pdev->dev, "request mem region fail\n");
+ goto err_mem;
+ }
+
+ dev->io_base = ioremap(smi_base->start, resource_size(smi_base));
+ if (!dev->io_base) {
+ ret = -EIO;
+ dev_err(&pdev->dev, "ioremap fail\n");
+ goto err_ioremap;
+ }
+
+ dev->pdev = pdev;
+ dev->clk_rate = pdata->clk_rate;
+
+ if (dev->clk_rate < 0 || dev->clk_rate > SMI_MAX_CLOCK_FREQ)
+ dev->clk_rate = SMI_MAX_CLOCK_FREQ;
+
+ dev->num_flashes = pdata->num_flashes;
+
+ if (dev->num_flashes > MAX_NUM_FLASH_CHIP) {
+ dev_err(&pdev->dev, "exceeding max number of flashes\n");
+ dev->num_flashes = MAX_NUM_FLASH_CHIP;
+ }
+
+ dev->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(dev->clk)) {
+ ret = PTR_ERR(dev->clk);
+ goto err_clk;
+ }
+
+ ret = clk_enable(dev->clk);
+ if (ret)
+ goto err_clk_enable;
+
+ ret = request_irq(irq, spear_smi_int_handler, 0, pdev->name, dev);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "SMI IRQ allocation failed\n");
+ goto err_irq;
+ }
+
+ mutex_init(&dev->lock);
+ init_waitqueue_head(&dev->cmd_complete);
+ spear_smi_hw_init(dev);
+ platform_set_drvdata(pdev, dev);
+
+ /* loop for each serial nor-flash which is connected to smi */
+ for (i = 0; i < dev->num_flashes; i++) {
+ ret = spear_smi_setup_banks(pdev, i, pdata->np[i]);
+ if (ret) {
+ dev_err(&dev->pdev->dev, "bank setup failed\n");
+ goto err_bank_setup;
+ }
+ }
+
+ return 0;
+
+err_bank_setup:
+ free_irq(irq, dev);
+ platform_set_drvdata(pdev, NULL);
+err_irq:
+ clk_disable(dev->clk);
+err_clk_enable:
+ clk_put(dev->clk);
+err_clk:
+ iounmap(dev->io_base);
+err_ioremap:
+ release_mem_region(smi_base->start, resource_size(smi_base));
+err_mem:
+ kfree(dev);
+err:
+ return ret;
+}
+
+/**
+ * spear_smi_remove - Exit routine
+ * @pdev: platform device structure
+ *
+ * free all allocations and delete the partitions.
+ */
+static int __devexit spear_smi_remove(struct platform_device *pdev)
+{
+ struct spear_smi *dev;
+ struct spear_smi_plat_data *pdata;
+ struct spear_snor_flash *flash;
+ struct resource *smi_base;
+ int ret;
+ int i, irq;
+
+ dev = platform_get_drvdata(pdev);
+ if (!dev) {
+ dev_err(&pdev->dev, "dev is null\n");
+ return -ENODEV;
+ }
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ /* clean up for all nor flash */
+ for (i = 0; i < dev->num_flashes; i++) {
+ flash = dev->flash[i];
+ if (!flash)
+ continue;
+
+ /* clean up mtd stuff */
+ ret = mtd_device_unregister(&flash->mtd);
+ if (ret)
+ dev_err(&pdev->dev, "error removing mtd\n");
+
+ iounmap(flash->base_addr);
+ kfree(flash);
+ }
+
+ irq = platform_get_irq(pdev, 0);
+ free_irq(irq, dev);
+
+ clk_disable(dev->clk);
+ clk_put(dev->clk);
+ iounmap(dev->io_base);
+ kfree(dev);
+
+ smi_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(smi_base->start, resource_size(smi_base));
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+int spear_smi_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct spear_smi *dev = platform_get_drvdata(pdev);
+
+ if (dev && dev->clk)
+ clk_disable(dev->clk);
+
+ return 0;
+}
+
+int spear_smi_resume(struct platform_device *pdev)
+{
+ struct spear_smi *dev = platform_get_drvdata(pdev);
+ int ret = -EPERM;
+
+ if (dev && dev->clk)
+ ret = clk_enable(dev->clk);
+
+ if (!ret)
+ spear_smi_hw_init(dev);
+ return ret;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id spear_smi_id_table[] = {
+ { .compatible = "st,spear600-smi" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, spear_smi_id_table);
+#endif
+
+static struct platform_driver spear_smi_driver = {
+ .driver = {
+ .name = "smi",
+ .bus = &platform_bus_type,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(spear_smi_id_table),
+ },
+ .probe = spear_smi_probe,
+ .remove = __devexit_p(spear_smi_remove),
+ .suspend = spear_smi_suspend,
+ .resume = spear_smi_resume,
+};
+
+static int spear_smi_init(void)
+{
+ return platform_driver_register(&spear_smi_driver);
+}
+module_init(spear_smi_init);
+
+static void spear_smi_exit(void)
+{
+ platform_driver_unregister(&spear_smi_driver);
+}
+module_exit(spear_smi_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ashish Priyadarshi, Shiraz Hashim <shiraz.hashim@st.com>");
+MODULE_DESCRIPTION("MTD SMI driver for serial nor flash chips");
diff --git a/drivers/mtd/devices/sst25l.c b/drivers/mtd/devices/sst25l.c
index 5fc198350b9..ab8a2f4c8d6 100644
--- a/drivers/mtd/devices/sst25l.c
+++ b/drivers/mtd/devices/sst25l.c
@@ -175,9 +175,6 @@ static int sst25l_erase(struct mtd_info *mtd, struct erase_info *instr)
int err;
/* Sanity checks */
- if (instr->addr + instr->len > flash->mtd.size)
- return -EINVAL;
-
if ((uint32_t)instr->len % mtd->erasesize)
return -EINVAL;
@@ -223,16 +220,6 @@ static int sst25l_read(struct mtd_info *mtd, loff_t from, size_t len,
unsigned char command[4];
int ret;
- /* Sanity checking */
- if (len == 0)
- return 0;
-
- if (from + len > flash->mtd.size)
- return -EINVAL;
-
- if (retlen)
- *retlen = 0;
-
spi_message_init(&message);
memset(&transfer, 0, sizeof(transfer));
@@ -274,13 +261,6 @@ static int sst25l_write(struct mtd_info *mtd, loff_t to, size_t len,
int i, j, ret, bytes, copied = 0;
unsigned char command[5];
- /* Sanity checks */
- if (!len)
- return 0;
-
- if (to + len > flash->mtd.size)
- return -EINVAL;
-
if ((uint32_t)to % mtd->writesize)
return -EINVAL;
@@ -402,10 +382,11 @@ static int __devinit sst25l_probe(struct spi_device *spi)
flash->mtd.flags = MTD_CAP_NORFLASH;
flash->mtd.erasesize = flash_info->erase_size;
flash->mtd.writesize = flash_info->page_size;
+ flash->mtd.writebufsize = flash_info->page_size;
flash->mtd.size = flash_info->page_size * flash_info->nr_pages;
- flash->mtd.erase = sst25l_erase;
- flash->mtd.read = sst25l_read;
- flash->mtd.write = sst25l_write;
+ flash->mtd._erase = sst25l_erase;
+ flash->mtd._read = sst25l_read;
+ flash->mtd._write = sst25l_write;
dev_info(&spi->dev, "%s (%lld KiB)\n", flash_info->name,
(long long)flash->mtd.size >> 10);
@@ -418,9 +399,9 @@ static int __devinit sst25l_probe(struct spi_device *spi)
flash->mtd.numeraseregions);
- ret = mtd_device_parse_register(&flash->mtd, NULL, 0,
- data ? data->parts : NULL,
- data ? data->nr_parts : 0);
+ ret = mtd_device_parse_register(&flash->mtd, NULL, NULL,
+ data ? data->parts : NULL,
+ data ? data->nr_parts : 0);
if (ret) {
kfree(flash);
dev_set_drvdata(&spi->dev, NULL);
@@ -450,18 +431,7 @@ static struct spi_driver sst25l_driver = {
.remove = __devexit_p(sst25l_remove),
};
-static int __init sst25l_init(void)
-{
- return spi_register_driver(&sst25l_driver);
-}
-
-static void __exit sst25l_exit(void)
-{
- spi_unregister_driver(&sst25l_driver);
-}
-
-module_init(sst25l_init);
-module_exit(sst25l_exit);
+module_spi_driver(sst25l_driver);
MODULE_DESCRIPTION("MTD SPI driver for SST25L Flash chips");
MODULE_AUTHOR("Andre Renaud <andre@bluewatersys.com>, "
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-21 13:16:36 +0000