Commit graph

129 commits

Author SHA1 Message Date
Rafael Campos
bc9019e197 cfi-flash: Added support to flash_real_protect for Atmel flash devices
Some of the flash memories produced by ATMEL start in read-only mode.
We need to unprotect it. This patch allows the AT49BV6416 to work with
cfi_flash memories. Tested in the at91rm9200ek board.

Signed-off-by: Rafael Campos Las Heras <rafael.campos@hanscan.com>
Signed-off-by: Stefan Roese <sr@denx.de>
2008-08-06 14:22:41 +02:00
Sebastian Siewior
340ccb260f cfi_flash: fix flash on BE machines with CFG_WRITE_SWAPPED_DATA
This got broken by commits 93c56f212c
 [cfi_flash: support of long cmd in U-boot.]

That command needs to be in little endian format on BE machines
with CFG_WRITE_SWAPPED_DATA. Without this patch, the command 0xf0
gets saved on stack as 0x00 00 00 f0 and 0x00 gets written into
the cmdbuf in case portwidth = chipwidth = 8bit.

Cc: Alexey Korolev <akorolev@infradead.org>
Cc: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
2008-07-17 11:42:35 +02:00
Sebastian Siewior
7288f972fc cfi_flash: make the command u32 only
This got changed by commit 93c56f212c
[cfi_flash: support of long cmd in U-boot.]

Long is the wrong type because it will behave differently on 64bit
machines in a way that is probably not expected. u32 should be
enough.

Cc: Alexey Korolev <akorolev@infradead.org>
Cc: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
2008-07-15 21:42:04 +02:00
Stefan Roese
fb8c061ea0 cfi-flash: Fix problem in flash_toggle(), busy was not detected reliably
This patch simplifies flash_toggle() (AMD commandset), which is used to
detect if a FLASH device is still busy with erase/program operations. On
800MHz Canyonlands/Glacier boards (460EX/GT) the current implementation
did not detect the busy state reliably, resulting in non erased sectors
etc. This patch now simplifies this function by "just" comparing the
complete data-word instead of ANDing it with the command-word (0x40)
before the compatison. It is done the same way in the Linux implementation
chip_ready() in cfi_cmdset_0002.c.

Signed-off-by: Stefan Roese <sr@denx.de>
2008-06-19 15:08:17 +02:00
Wolfgang Denk
1859e42fbf Merge branch 'master' of git://www.denx.de/git/u-boot-cfi-flash 2008-06-11 22:24:46 +02:00
Vasiliy Leoenenko
9c048b5234 cfi_flash: enable M18 flash chips family support.
Added new command set ID. Buffered write command processing is changed
in order to support M18 flash chips family.

Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Signed-off-by: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
2008-06-03 21:02:34 +02:00
Vasiliy Leoenenko
93c56f212c cfi_flash: support of long cmd in U-boot.
Some NOR flash chips needs support of commands with length grether than max
value size of uchar. For example all M18 family chips use 0x1ff command in
buffered write mode as value of program loops count.

Signed-off-by: Alexey Korolev <akorolev@infradead.org>
Signed-off-by: Vasiliy Leonenko <vasiliy.leonenko@mail.ru>
2008-06-03 21:01:55 +02:00
Kumar Gala
f979690ee3 Fix warnings from gcc-4.3.0 build on a ppc host
* The cfi_flash.c memset fix actual allows the board to boot so there is
  a bit more going on here than just resolving warnings associated with
  uninitialized variables.

* include/asm/bitops.h:302: warning: '__swab32p' is static but used in
  inline function 'ext2_find_next_zero_bit' which is not static

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2008-06-03 19:52:52 +02:00
Matthias Fuchs
c63ad6325a cfi-flash: Add CFG_FLASH_AUTOPROTECT_LIST
This patch adds a configurable flash auto protection list that can be used
to make U-Boot protect flash regions in flash_init().

The idea has been discussed on the u-boot mailing list starting
on Nov 18th, 2007.

Even this patch brings a new feature it is used as a bugfix for 4xx
platforms where flash_init() does not completely protect the
monitor's flash range in all situations.

U-Boot protects the flash range from CFG_MONITOR_BASE to
(CFG_MONITOR_BASE + monitor_flash_len  - 1) by default. This does not
include the reset vector at 0xfffffffc.

Example:
#define CFG_FLASH_AUTOPROTECT_LIST {{0xfff80000, 0x80000}}

This config option will auto protect the last 512k of flash that
contains the bootloader on board like APC405 and PMC405.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
2008-04-25 15:52:14 +02:00
Guennadi Liakhovetski
96ef831f71 cfi_flash: Support buffered writes on non-standard Spansion NOR flash
Some NOR flash chip from Spansion, for example, the s29ws-n MirrorBit
series require different addresses for buffered write commands. Define a
configuration option to support buffered writes on those chips. A more
elegant solution would be to automatically detect those chips by parsing
their CFI records, but that would require introduction of a fixup table
into the cfi_flash driver.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
2008-04-12 08:59:09 +02:00
Daniel Hellstrom
97bf85d784 MTD/CFI: flash_read64 is defined a weak function (for SPARC)
SPARC has implemented __raw_readq, it reads 64-bit from any 32-bit address.
SPARC CPUs implement flash_read64 which calls __raw_readq.

For current SPARC architectures (LEON2 and LEON3) each read from the
FLASH must lead to a cache miss. This is because FLASH can not be set
non-cacheable since program code resides there, and alternatively disabling
cache is poor from performance view, or doing a cache flush between each
read is even poorer.

Forcing a cache miss on a SPARC is done by a special instruction "lda" -
load alternative space, the alternative space number (ASI) is processor
implementation spcific and can be found by including <asm/processor.h>.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
2008-03-29 06:51:04 +01:00
Tor Krill
90447ecbba MTD/CFI: Add support for 16bit legacy AMD flash
Add entry for 512Kx16 AMD flash to jedec_table.
Read out 16bit device id if chipwidth is 16bit.
Fixed coding style after Stefans feedback

Signed-off-by: Tor Krill <tor@excito.com>
2008-03-28 11:44:23 +01:00
Stefan Roese
f0105727d1 CFI: Small cleanup for FLASH_SHOW_PROGRESS
With this patch we don't need that many #ifdef's in the code. It moves
the subtraction into the macro and defines a NOP-macro when
CONFIG_FLASH_SHOW_PROGRESS is not defined.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
2008-03-19 13:41:25 +01:00
Jerry Van Baren
9a042e9ca5 Flash programming progress countdown.
Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>
2008-03-19 13:41:25 +01:00
Michael Schwingen
1ba639da56 CFI: Do not use uninitialized cmd_reset
Do not use uninitialized cmd_reset; issue both AMD and Intel reset
commands instead

From a short test, it looks like AMD-style flash roms treat *any* unknown
command write as a reset, at least when in CFI Query mode, so issuing the
Intel reset command to AMD-style flashs seems safe (from the small sample I
have), plus the 3-cycle magic sequence should kick the state machine into
the right state even without a reset command. Since the AMD-style flashs
require the unlock sequence for real operation, I chose to try the AMD reset
command first, so that Intel flashs do no see an invalid command prior to
the CFI query.

I have tested the patch on AM29LV320-style flashs from Fujitsu and Macronix,
plus Intel StrataFlash.

Signed-off-by: Michael Schwingen <michael@schwingen.org>
Signed-off-by: Stefan Roese <sr@denx.de>
2008-02-21 17:12:19 +01:00
Michael Schwingen
8225d1e3ac CFI: Fix CONFIG_FLASH_CFI_LEGACY compilation
Signed-off-by: Michael Schwingen <michael@schwingen.org>
Acked-by: Stefan Roese <sr@denx.de>
2008-01-13 15:07:26 +01:00
Stefan Roese
47cc23cbe9 cfi_flash: Fix bug in flash_isset() to use correct 32bit function
This bug was detected on the LWMON5 target which has 2 Intel 16bit wide
flash chips connected to a 32bit wide port.

Signed-off-by: Stefan Roese <sr@denx.de>
2008-01-02 14:05:37 +01:00
Stefan Roese
0dc80e2759 cfi_flash: Add missing check for erased dest to flash_write_cfibuffer()
The check for an sufficiently erased destination was missing in the
buffered write function of the cfi flash driver (when
CFG_FLASH_USE_BUFFER_WRITE is defined). This patch adds this check to that
writing to such a region will fail with the currect error message.

Signed-off-by: Stefan Roese <sr@denx.de>
2007-12-27 07:50:54 +01:00
Haavard Skinnemoen
467bcee11f cfi_flash: Add manufacturer-specific fixups
Run fixups based on the JEDEC manufacturer ID independent of the
command set ID.

This changes current behaviour: Previously, geometry reversal for AMD
chips were done based on the command set ID, while they are now done
based on the JEDEC manufacturer and device ID.

Also add fixup for top-boot Atmel chips. A fixup is needed for
AT49BV6416(T) too, but since u-boot currently only reads the low byte
of the device ID, there's no way to tell it apart from AT49BV642D,
which should not have this fixup. Since AT49BV642D support is
necessary to get ATNGW100 board support into mainline, I've commented
out the fixup for now.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-17 15:48:38 +01:00
Haavard Skinnemoen
0ddf06ddf6 cfi_flash: Add cmdset-specific init functions
Move things like reading JEDEC IDs and fixing up geometry reversal
into separate functions. The geometry reversal fixup is now performed
by altering the qry structure directly, which makes the sector init
code slightly cleaner.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-17 15:48:31 +01:00
Haavard Skinnemoen
e23741f4a6 cfi_flash: Read whole QRY structure in one go
Read out the whole CFI Standard Query structure after successful cfi
identification. This allows subsequent code to access this information
directly without having to go through flash_read_uchar() and friends.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-17 15:48:25 +01:00
Haavard Skinnemoen
12d30aa797 cfi_flash: Use map_physmem() and unmap_physmem()
Use map_physmem() and unmap_physmem() to convert from physical to
virtual addresses. This gives the arch a chance to provide an uncached
mapping for flash accesses.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-13 13:15:22 +01:00
Haavard Skinnemoen
cdbaefb5f5 cfi_flash: Introduce read and write accessors
Introduce flash_read{8,16,32,64) and flash_write{8,16,32,64} and use
them to access the flash memory. This makes it clearer when the flash
is actually being accessed; merely dereferencing a volatile pointer
looks just like any other kind of access.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-13 13:15:11 +01:00
Haavard Skinnemoen
be60a9021c cfi_flash: Reorder functions and eliminate extra prototypes
Reorder the functions in cfi_flash.c so that each function only uses
functions that have been defined before it. This allows the static
prototype declarations near the top to be eliminated and might allow
gcc to do a better job inlining functions.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-13 13:14:55 +01:00
Haavard Skinnemoen
3055793bcb cfi_flash: Make some needlessly global functions static
Make functions not declared in any header file static.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-13 13:12:46 +01:00
Haavard Skinnemoen
7e5b9b4715 cfi_flash: Break long lines
This patch tries to keep all lines in the cfi_flash driver below 80
columns. There are a few lines left which don't fit this requirement
because I couldn't find any trivial way to break them (i.e. it would
take some restructuring, which I intend to do in a later patch.)

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
2007-12-13 13:11:45 +01:00
Bartlomiej Sieka
42026c9cb3 CFI: synchronize command offsets with Linux CFI driver
Fixes non-working CFI Flash on the Inka4x0 board.

Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
2007-12-13 12:00:37 +01:00
Michael Schwingen
81b20ccc2d CFI: support JEDEC flash roms in CFI-flash framework
The following patch adds support for non-CFI flash ROMS, by hooking into the
CFI flash code and using most of its code, as recently discussed here in the
thread "Mixing CFI and non-CFI flashs".

Signed-off-by: Michael Schwingen <michael@schwingen.org>
Signed-off-by: Stefan Roese <sr@denx.de>
2007-12-08 08:16:50 +01:00
Jean-Christophe PLAGNIOL-VILLARD
59829cc189 drivers/mtd : move mtd drivers to drivers/mtd
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2007-11-25 23:28:52 +01:00
Renamed from drivers/cfi_flash.c (Browse further)