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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-27 19:40:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-27 19:40:56 -0700
commita17d47300b4042a3893217c0c3f2d806fe1faa3b (patch)
tree91964353354d358cbafc350421e2bddb9455c73c
parent04a6553f0766df3f56830c89b7da2f618b7ef0b0 (diff)
parent7bf7e370d5919112c223a269462cd0b546903829 (diff)
Merge branch 'for-linus-1' of git://git.infradead.org/mtd-2.6
* 'for-linus-1' of git://git.infradead.org/mtd-2.6: (49 commits) mtd: mtdswap: fix compilation warning mtdswap: kill strict error handling option mtd: nand: enable software BCH ECC in nand simulator mtd: nand: add software BCH ECC support mtd: fix printf format warnings, mostly lack of %zd for size_t, in mtdswap mtd: sm_rtl: check kmalloc return value mtd: cfi: add support for AMIC flashes (e.g. A29L160AT) lib: add shared BCH ECC library mtd: mxc_nand: fix OOB corruption when page size > 2KiB mtd: DaVinci: Removed header file that is not required mtd: pxa3xx_nand: clean the keep configure code mtd: pxa3xx_nand: mtd scan id process could be defined by driver itself mtd: pxa3xx_nand: unify prepare command mtd: pxa3xx_nand: discard wait_for_event,write_cmd,__readid function mtd: pxa3xx_nand: rework irq logic mtd: pxa3xx_nand: make scan procedure more clear mtd: speedtest: fix integer overflow mtd: mxc_nand: fix read past buffer end mtd: omap3: nand: report corrected ecc errors jffs2: remove a trailing white space in commentaries ...
-rw-r--r--arch/arm/plat-omap/include/plat/onenand.h1
-rw-r--r--arch/arm/plat-pxa/include/plat/pxa3xx_nand.h2
-rw-r--r--arch/cris/Kconfig1
-rw-r--r--arch/cris/arch-v10/drivers/axisflashmap.c6
-rw-r--r--arch/cris/arch-v32/drivers/Kconfig1
-rw-r--r--arch/cris/arch-v32/drivers/axisflashmap.c6
-rw-r--r--drivers/mtd/Kconfig18
-rw-r--r--drivers/mtd/Makefile4
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0001.c2
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c3
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0020.c2
-rw-r--r--drivers/mtd/devices/m25p80.c5
-rw-r--r--drivers/mtd/devices/mtdram.c1
-rw-r--r--drivers/mtd/devices/phram.c3
-rw-r--r--drivers/mtd/maps/Kconfig13
-rw-r--r--drivers/mtd/maps/Makefile1
-rw-r--r--drivers/mtd/maps/ceiva.c6
-rw-r--r--drivers/mtd/maps/integrator-flash.c10
-rw-r--r--drivers/mtd/maps/latch-addr-flash.c272
-rw-r--r--drivers/mtd/maps/physmap.c8
-rw-r--r--drivers/mtd/maps/physmap_of.c8
-rw-r--r--drivers/mtd/maps/sa1100-flash.c8
-rw-r--r--drivers/mtd/maps/ts5500_flash.c1
-rw-r--r--drivers/mtd/mtd_blkdevs.c42
-rw-r--r--drivers/mtd/mtdconcat.c8
-rw-r--r--drivers/mtd/mtdcore.c6
-rw-r--r--drivers/mtd/mtdswap.c1587
-rw-r--r--drivers/mtd/nand/Kconfig15
-rw-r--r--drivers/mtd/nand/Makefile1
-rw-r--r--drivers/mtd/nand/atmel_nand.c166
-rw-r--r--drivers/mtd/nand/davinci_nand.c3
-rw-r--r--drivers/mtd/nand/mpc5121_nfc.c5
-rw-r--r--drivers/mtd/nand/mxc_nand.c31
-rw-r--r--drivers/mtd/nand/nand_base.c42
-rw-r--r--drivers/mtd/nand/nand_bbt.c8
-rw-r--r--drivers/mtd/nand/nand_bch.c243
-rw-r--r--drivers/mtd/nand/nandsim.c43
-rw-r--r--drivers/mtd/nand/omap2.c16
-rw-r--r--drivers/mtd/nand/pxa3xx_nand.c977
-rw-r--r--drivers/mtd/onenand/omap2.c7
-rw-r--r--drivers/mtd/onenand/onenand_base.c15
-rw-r--r--drivers/mtd/sm_ftl.c18
-rw-r--r--drivers/mtd/tests/mtd_speedtest.c80
-rw-r--r--drivers/mtd/tests/mtd_subpagetest.c10
-rw-r--r--fs/jffs2/xattr.c2
-rw-r--r--include/linux/bch.h79
-rw-r--r--include/linux/mtd/blktrans.h3
-rw-r--r--include/linux/mtd/cfi.h1
-rw-r--r--include/linux/mtd/latch-addr-flash.h29
-rw-r--r--include/linux/mtd/nand.h3
-rw-r--r--include/linux/mtd/nand_bch.h72
-rw-r--r--include/linux/mtd/onenand.h1
-rw-r--r--lib/Kconfig39
-rw-r--r--lib/Makefile1
-rw-r--r--lib/bch.c1368
55 files changed, 4655 insertions, 648 deletions
diff --git a/arch/arm/plat-omap/include/plat/onenand.h b/arch/arm/plat-omap/include/plat/onenand.h
index cbe897ca7f9..2858667d2e4 100644
--- a/arch/arm/plat-omap/include/plat/onenand.h
+++ b/arch/arm/plat-omap/include/plat/onenand.h
@@ -32,6 +32,7 @@ struct omap_onenand_platform_data {
int dma_channel;
u8 flags;
u8 regulator_can_sleep;
+ u8 skip_initial_unlocking;
};
#define ONENAND_MAX_PARTITIONS 8
diff --git a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
index 01a8448e471..442301fe48b 100644
--- a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
+++ b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
@@ -30,6 +30,7 @@ struct pxa3xx_nand_cmdset {
};
struct pxa3xx_nand_flash {
+ char *name;
uint32_t chip_id;
unsigned int page_per_block; /* Pages per block (PG_PER_BLK) */
unsigned int page_size; /* Page size in bytes (PAGE_SZ) */
@@ -37,7 +38,6 @@ struct pxa3xx_nand_flash {
unsigned int dfc_width; /* Width of flash controller(DWIDTH_C) */
unsigned int num_blocks; /* Number of physical blocks in Flash */
- struct pxa3xx_nand_cmdset *cmdset; /* NAND command set */
struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
};
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 4db5b46e1ef..04a7fc5eaf4 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig
@@ -276,7 +276,6 @@ config ETRAX_AXISFLASHMAP
select MTD_CHAR
select MTD_BLOCK
select MTD_PARTITIONS
- select MTD_CONCAT
select MTD_COMPLEX_MAPPINGS
help
This option enables MTD mapping of flash devices. Needed to use
diff --git a/arch/cris/arch-v10/drivers/axisflashmap.c b/arch/cris/arch-v10/drivers/axisflashmap.c
index b2079703af7..ed708e19d09 100644
--- a/arch/cris/arch-v10/drivers/axisflashmap.c
+++ b/arch/cris/arch-v10/drivers/axisflashmap.c
@@ -234,7 +234,6 @@ static struct mtd_info *flash_probe(void)
}
if (mtd_cse0 && mtd_cse1) {
-#ifdef CONFIG_MTD_CONCAT
struct mtd_info *mtds[] = { mtd_cse0, mtd_cse1 };
/* Since the concatenation layer adds a small overhead we
@@ -246,11 +245,6 @@ static struct mtd_info *flash_probe(void)
*/
mtd_cse = mtd_concat_create(mtds, ARRAY_SIZE(mtds),
"cse0+cse1");
-#else
- printk(KERN_ERR "%s and %s: Cannot concatenate due to kernel "
- "(mis)configuration!\n", map_cse0.name, map_cse1.name);
- mtd_cse = NULL;
-#endif
if (!mtd_cse) {
printk(KERN_ERR "%s and %s: Concatenation failed!\n",
map_cse0.name, map_cse1.name);
diff --git a/arch/cris/arch-v32/drivers/Kconfig b/arch/cris/arch-v32/drivers/Kconfig
index a2dd740c590..1633b120aa8 100644
--- a/arch/cris/arch-v32/drivers/Kconfig
+++ b/arch/cris/arch-v32/drivers/Kconfig
@@ -406,7 +406,6 @@ config ETRAX_AXISFLASHMAP
select MTD_CHAR
select MTD_BLOCK
select MTD_PARTITIONS
- select MTD_CONCAT
select MTD_COMPLEX_MAPPINGS
help
This option enables MTD mapping of flash devices. Needed to use
diff --git a/arch/cris/arch-v32/drivers/axisflashmap.c b/arch/cris/arch-v32/drivers/axisflashmap.c
index 51e1e85df96..3d751250271 100644
--- a/arch/cris/arch-v32/drivers/axisflashmap.c
+++ b/arch/cris/arch-v32/drivers/axisflashmap.c
@@ -275,7 +275,6 @@ static struct mtd_info *flash_probe(void)
}
if (count > 1) {
-#ifdef CONFIG_MTD_CONCAT
/* Since the concatenation layer adds a small overhead we
* could try to figure out if the chips in cse0 and cse1 are
* identical and reprobe the whole cse0+cse1 window. But since
@@ -284,11 +283,6 @@ static struct mtd_info *flash_probe(void)
* complicating the probing procedure.
*/
mtd_total = mtd_concat_create(mtds, count, "cse0+cse1");
-#else
- printk(KERN_ERR "%s and %s: Cannot concatenate due to kernel "
- "(mis)configuration!\n", map_cse0.name, map_cse1.name);
- mtd_toal = NULL;
-#endif
if (!mtd_total) {
printk(KERN_ERR "%s and %s: Concatenation failed!\n",
map_cse0.name, map_cse1.name);
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig
index 77414702cb0..b4567c35a32 100644
--- a/drivers/mtd/Kconfig
+++ b/drivers/mtd/Kconfig
@@ -33,14 +33,6 @@ config MTD_TESTS
should normally be compiled as kernel modules. The modules perform
various checks and verifications when loaded.
-config MTD_CONCAT
- tristate "MTD concatenating support"
- help
- Support for concatenating several MTD devices into a single
- (virtual) one. This allows you to have -for example- a JFFS(2)
- file system spanning multiple physical flash chips. If unsure,
- say 'Y'.
-
config MTD_PARTITIONS
bool "MTD partitioning support"
help
@@ -333,6 +325,16 @@ config MTD_OOPS
To use, add console=ttyMTDx to the kernel command line,
where x is the MTD device number to use.
+config MTD_SWAP
+ tristate "Swap on MTD device support"
+ depends on MTD && SWAP
+ select MTD_BLKDEVS
+ help
+ Provides volatile block device driver on top of mtd partition
+ suitable for swapping. The mapping of written blocks is not saved.
+ The driver provides wear leveling by storing erase counter into the
+ OOB.
+
source "drivers/mtd/chips/Kconfig"
source "drivers/mtd/maps/Kconfig"
diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile
index d4e7f25b1eb..d578095fb25 100644
--- a/drivers/mtd/Makefile
+++ b/drivers/mtd/Makefile
@@ -4,11 +4,10 @@
# Core functionality.
obj-$(CONFIG_MTD) += mtd.o
-mtd-y := mtdcore.o mtdsuper.o
+mtd-y := mtdcore.o mtdsuper.o mtdconcat.o
mtd-$(CONFIG_MTD_PARTITIONS) += mtdpart.o
mtd-$(CONFIG_MTD_OF_PARTS) += ofpart.o
-obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o
obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
@@ -26,6 +25,7 @@ obj-$(CONFIG_RFD_FTL) += rfd_ftl.o
obj-$(CONFIG_SSFDC) += ssfdc.o
obj-$(CONFIG_SM_FTL) += sm_ftl.o
obj-$(CONFIG_MTD_OOPS) += mtdoops.o
+obj-$(CONFIG_MTD_SWAP) += mtdswap.o
nftl-objs := nftlcore.o nftlmount.o
inftl-objs := inftlcore.o inftlmount.o
diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 4aaa88f8ab5..092aef11120 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -455,7 +455,7 @@ struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
mtd->flags = MTD_CAP_NORFLASH;
mtd->name = map->name;
mtd->writesize = 1;
- mtd->writebufsize = 1 << cfi->cfiq->MaxBufWriteSize;
+ mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
mtd->reboot_notifier.notifier_call = cfi_intelext_reboot;
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index f072fcfde04..f9a5331e944 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -349,6 +349,7 @@ static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri },
#ifdef AMD_BOOTLOC_BUG
{ CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock },
+ { CFI_MFR_AMIC, CFI_ID_ANY, fixup_amd_bootblock },
{ CFI_MFR_MACRONIX, CFI_ID_ANY, fixup_amd_bootblock },
#endif
{ CFI_MFR_AMD, 0x0050, fixup_use_secsi },
@@ -440,7 +441,7 @@ struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
mtd->flags = MTD_CAP_NORFLASH;
mtd->name = map->name;
mtd->writesize = 1;
- mtd->writebufsize = 1 << cfi->cfiq->MaxBufWriteSize;
+ mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): write buffer size %d\n",
__func__, mtd->writebufsize);
diff --git a/drivers/mtd/chips/cfi_cmdset_0020.c b/drivers/mtd/chips/cfi_cmdset_0020.c
index c04b7658abe..ed56ad3884f 100644
--- a/drivers/mtd/chips/cfi_cmdset_0020.c
+++ b/drivers/mtd/chips/cfi_cmdset_0020.c
@@ -238,7 +238,7 @@ static struct mtd_info *cfi_staa_setup(struct map_info *map)
mtd->resume = cfi_staa_resume;
mtd->flags = MTD_CAP_NORFLASH & ~MTD_BIT_WRITEABLE;
mtd->writesize = 8; /* FIXME: Should be 0 for STMicro flashes w/out ECC */
- mtd->writebufsize = 1 << cfi->cfiq->MaxBufWriteSize;
+ mtd->writebufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
map->fldrv = &cfi_staa_chipdrv;
__module_get(THIS_MODULE);
mtd->name = map->name;
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index e4eba6cc1b2..3fb981d4bb5 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -655,7 +655,8 @@ static const struct spi_device_id m25p_ids[] = {
{ "at26df161a", INFO(0x1f4601, 0, 64 * 1024, 32, SECT_4K) },
{ "at26df321", INFO(0x1f4700, 0, 64 * 1024, 64, SECT_4K) },
- /* EON -- en25pxx */
+ /* EON -- en25xxx */
+ { "en25f32", INFO(0x1c3116, 0, 64 * 1024, 64, SECT_4K) },
{ "en25p32", INFO(0x1c2016, 0, 64 * 1024, 64, 0) },
{ "en25p64", INFO(0x1c2017, 0, 64 * 1024, 128, 0) },
@@ -728,6 +729,8 @@ static const struct spi_device_id m25p_ids[] = {
{ "m25pe80", INFO(0x208014, 0, 64 * 1024, 16, 0) },
{ "m25pe16", INFO(0x208015, 0, 64 * 1024, 32, SECT_4K) },
+ { "m25px64", INFO(0x207117, 0, 64 * 1024, 128, 0) },
+
/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
{ "w25x10", INFO(0xef3011, 0, 64 * 1024, 2, SECT_4K) },
{ "w25x20", INFO(0xef3012, 0, 64 * 1024, 4, SECT_4K) },
diff --git a/drivers/mtd/devices/mtdram.c b/drivers/mtd/devices/mtdram.c
index 26a6e809013..1483e18971c 100644
--- a/drivers/mtd/devices/mtdram.c
+++ b/drivers/mtd/devices/mtdram.c
@@ -121,6 +121,7 @@ int mtdram_init_device(struct mtd_info *mtd, void *mapped_address,
mtd->flags = MTD_CAP_RAM;
mtd->size = size;
mtd->writesize = 1;
+ mtd->writebufsize = 64; /* Mimic CFI NOR flashes */
mtd->erasesize = MTDRAM_ERASE_SIZE;
mtd->priv = mapped_address;
diff --git a/drivers/mtd/devices/phram.c b/drivers/mtd/devices/phram.c
index 52393282eaf..8d28fa02a5a 100644
--- a/drivers/mtd/devices/phram.c
+++ b/drivers/mtd/devices/phram.c
@@ -117,6 +117,7 @@ static void unregister_devices(void)
list_for_each_entry_safe(this, safe, &phram_list, list) {
del_mtd_device(&this->mtd);
iounmap(this->mtd.priv);
+ kfree(this->mtd.name);
kfree(this);
}
}
@@ -275,6 +276,8 @@ static int phram_setup(const char *val, struct kernel_param *kp)
ret = register_device(name, start, len);
if (!ret)
pr_info("%s device: %#x at %#x\n", name, len, start);
+ else
+ kfree(name);
return ret;
}
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 5d37d315fa9..44b1f46458c 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -114,7 +114,7 @@ config MTD_SUN_UFLASH
config MTD_SC520CDP
tristate "CFI Flash device mapped on AMD SC520 CDP"
- depends on X86 && MTD_CFI && MTD_CONCAT
+ depends on X86 && MTD_CFI
help
The SC520 CDP board has two banks of CFI-compliant chips and one
Dual-in-line JEDEC chip. This 'mapping' driver supports that
@@ -262,7 +262,7 @@ config MTD_BCM963XX
config MTD_DILNETPC
tristate "CFI Flash device mapped on DIL/Net PC"
- depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
+ depends on X86 && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
help
MTD map driver for SSV DIL/Net PC Boards "DNP" and "ADNP".
For details, see <http://www.ssv-embedded.de/ssv/pc104/p169.htm>
@@ -552,4 +552,13 @@ config MTD_PISMO
When built as a module, it will be called pismo.ko
+config MTD_LATCH_ADDR
+ tristate "Latch-assisted Flash Chip Support"
+ depends on MTD_COMPLEX_MAPPINGS
+ help
+ Map driver which allows flashes to be partially physically addressed
+ and have the upper address lines set by a board specific code.
+
+ If compiled as a module, it will be called latch-addr-flash.
+
endmenu
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index c7869c7a6b1..08533bd5cba 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -59,3 +59,4 @@ obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o
obj-$(CONFIG_MTD_VMU) += vmu-flash.o
obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-flash.o
+obj-$(CONFIG_MTD_LATCH_ADDR) += latch-addr-flash.o
diff --git a/drivers/mtd/maps/ceiva.c b/drivers/mtd/maps/ceiva.c
index c09f4f57093..e5f645b775a 100644
--- a/drivers/mtd/maps/ceiva.c
+++ b/drivers/mtd/maps/ceiva.c
@@ -194,16 +194,10 @@ static int __init clps_setup_mtd(struct clps_info *clps, int nr, struct mtd_info
* We detected multiple devices. Concatenate
* them together.
*/
-#ifdef CONFIG_MTD_CONCAT
*rmtd = mtd_concat_create(subdev, found,
"clps flash");
if (*rmtd == NULL)
ret = -ENXIO;
-#else
- printk(KERN_ERR "clps flash: multiple devices "
- "found but MTD concat support disabled.\n");
- ret = -ENXIO;
-#endif
}
}
diff --git a/drivers/mtd/maps/integrator-flash.c b/drivers/mtd/maps/integrator-flash.c
index 2aac41bde8b..e22ff5adbbf 100644
--- a/drivers/mtd/maps/integrator-flash.c
+++ b/drivers/mtd/maps/integrator-flash.c
@@ -202,7 +202,6 @@ static int armflash_probe(struct platform_device *dev)
if (info->nr_subdev == 1)
info->mtd = info->subdev[0].mtd;
else if (info->nr_subdev > 1) {
-#ifdef CONFIG_MTD_CONCAT
struct mtd_info *cdev[info->nr_subdev];
/*
@@ -215,11 +214,6 @@ static int armflash_probe(struct platform_device *dev)
dev_name(&dev->dev));
if (info->mtd == NULL)
err = -ENXIO;
-#else
- printk(KERN_ERR "armflash: multiple devices found but "
- "MTD concat support disabled.\n");
- err = -ENXIO;
-#endif
}
if (err < 0)
@@ -244,10 +238,8 @@ static int armflash_probe(struct platform_device *dev)
cleanup:
if (info->mtd) {
del_mtd_partitions(info->mtd);
-#ifdef CONFIG_MTD_CONCAT
if (info->mtd != info->subdev[0].mtd)
mtd_concat_destroy(info->mtd);
-#endif
}
kfree(info->parts);
subdev_err:
@@ -272,10 +264,8 @@ static int armflash_remove(struct platform_device *dev)
if (info) {
if (info->mtd) {
del_mtd_partitions(info->mtd);
-#ifdef CONFIG_MTD_CONCAT
if (info->mtd != info->subdev[0].mtd)
mtd_concat_destroy(info->mtd);
-#endif
}
kfree(info->parts);
diff --git a/drivers/mtd/maps/latch-addr-flash.c b/drivers/mtd/maps/latch-addr-flash.c
new file mode 100644
index 00000000000..ee254808533
--- /dev/null
+++ b/drivers/mtd/maps/latch-addr-flash.c
@@ -0,0 +1,272 @@
+/*
+ * Interface for NOR flash driver whose high address lines are latched
+ *
+ * Copyright © 2000 Nicolas Pitre <nico@cam.org>
+ * Copyright © 2005-2008 Analog Devices Inc.
+ * Copyright © 2008 MontaVista Software, Inc. <source@mvista.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/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/latch-addr-flash.h>
+#include <linux/slab.h>
+
+#define DRIVER_NAME "latch-addr-flash"
+
+struct latch_addr_flash_info {
+ struct mtd_info *mtd;
+ struct map_info map;
+ struct resource *res;
+
+ void (*set_window)(unsigned long offset, void *data);
+ void *data;
+
+ /* cache; could be found out of res */
+ unsigned long win_mask;
+
+ int nr_parts;
+ struct mtd_partition *parts;
+
+ spinlock_t lock;
+};
+
+static map_word lf_read(struct map_info *map, unsigned long ofs)
+{
+ struct latch_addr_flash_info *info;
+ map_word datum;
+
+ info = (struct latch_addr_flash_info *)map->map_priv_1;
+
+ spin_lock(&info->lock);
+
+ info->set_window(ofs, info->data);
+ datum = inline_map_read(map, info->win_mask & ofs);
+
+ spin_unlock(&info->lock);
+
+ return datum;
+}
+
+static void lf_write(struct map_info *map, map_word datum, unsigned long ofs)
+{
+ struct latch_addr_flash_info *info;
+
+ info = (struct latch_addr_flash_info *)map->map_priv_1;
+
+ spin_lock(&info->lock);
+
+ info->set_window(ofs, info->data);
+ inline_map_write(map, datum, info->win_mask & ofs);
+
+ spin_unlock(&info->lock);
+}
+
+static void lf_copy_from(struct map_info *map, void *to,
+ unsigned long from, ssize_t len)
+{
+ struct latch_addr_flash_info *info =
+ (struct latch_addr_flash_info *) map->map_priv_1;
+ unsigned n;
+
+ while (len > 0) {
+ n = info->win_mask + 1 - (from & info->win_mask);
+ if (n > len)
+ n = len;
+
+ spin_lock(&info->lock);
+
+ info->set_window(from, info->data);
+ memcpy_fromio(to, map->virt + (from & info->win_mask), n);
+
+ spin_unlock(&info->lock);
+
+ to += n;
+ from += n;
+ len -= n;
+ }
+}
+
+static char *rom_probe_types[] = { "cfi_probe", NULL };
+
+static char *part_probe_types[] = { "cmdlinepart", NULL };
+
+static int latch_addr_flash_remove(struct platform_device *dev)
+{
+ struct latch_addr_flash_info *info;
+ struct latch_addr_flash_data *latch_addr_data;
+
+ info = platform_get_drvdata(dev);
+ if (info == NULL)
+ return 0;
+ platform_set_drvdata(dev, NULL);
+
+ latch_addr_data = dev->dev.platform_data;
+
+ if (info->mtd != NULL) {
+ if (mtd_has_partitions()) {
+ if (info->nr_parts) {
+ del_mtd_partitions(info->mtd);
+ kfree(info->parts);
+ } else if (latch_addr_data->nr_parts) {
+ del_mtd_partitions(info->mtd);
+ } else {
+ del_mtd_device(info->mtd);
+ }
+ } else {
+ del_mtd_device(info->mtd);
+ }
+ map_destroy(info->mtd);
+ }
+
+ if (info->map.virt != NULL)
+ iounmap(info->map.virt);
+
+ if (info->res != NULL)
+ release_mem_region(info->res->start, resource_size(info->res));
+
+ kfree(info);
+
+ if (latch_addr_data->done)
+ latch_addr_data->done(latch_addr_data->data);
+
+ return 0;
+}
+
+static int __devinit latch_addr_flash_probe(struct platform_device *dev)
+{
+ struct latch_addr_flash_data *latch_addr_data;
+ struct latch_addr_flash_info *info;
+ resource_size_t win_base = dev->resource->start;
+ resource_size_t win_size = resource_size(dev->resource);
+ char **probe_type;
+ int chipsel;
+ int err;
+
+ latch_addr_data = dev->dev.platform_data;
+ if (latch_addr_data == NULL)
+ return -ENODEV;
+
+ pr_notice("latch-addr platform flash device: %#llx byte "
+ "window at %#.8llx\n",
+ (unsigned long long)win_size, (unsigned long long)win_base);
+
+ chipsel = dev->id;
+
+ if (latch_addr_data->init) {
+ err = latch_addr_data->init(latch_addr_data->data, chipsel);
+ if (err != 0)
+ return err;
+ }
+
+ info = kzalloc(sizeof(struct latch_addr_flash_info), GFP_KERNEL);
+ if (info == NULL) {
+ err = -ENOMEM;
+ goto done;
+ }
+
+ platform_set_drvdata(dev, info);
+
+ info->res = request_mem_region(win_base, win_size, DRIVER_NAME);
+ if (info->res == NULL) {
+ dev_err(&dev->dev, "Could not reserve memory region\n");
+ err = -EBUSY;
+ goto free_info;
+ }
+
+ info->map.name = DRIVER_NAME;
+ info->map.size = latch_addr_data->size;
+ info->map.bankwid