Blackfin SPI driver was not driving the SPI chip-select high before
putting the chip-select signals into tri-state mode. This is probably
something that slipped by unnoticed in most designs. If the signals are
put directly into a tri-state mode, then the board is relying on the
pull-up resistors to pull up the chip-select before the next transaction.
Most of the time this is fine, except when you have two transactions that
follow each other very closely, such as the flash erase and read status
register commands. In this case I was seeing a 500ns separation between
the transactions. In my setup, with a 10kOhm pull-up, it would meet
timing spec about half the time and resulted in intermittent errors. (A
stronger pull up would fix this, but our design is targeted for low power
consumption and a 3.3kOhm @ 3.3v is 3.3mW of needless power consumption.)
I modified the spi_cs_deactivate() function in bfin_spi.c to drive the
chip-selects high before putting them into tri-state. For me, this
resulted in a rise time of 5ns instead of the previous rise time of about
1us, and fully satisfied the timing spec of the chip.
Signed-off-by: Todor I Mollov <tmollov@ucsd.edu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
On platforms with multiple NOR chips, currently only the first one
can be selected using the "ubi part" command. This patch fixes this
problem by using different names for the NOR "mtd devices".
It also changes the name of the NOR MTD device from "cfi-mtd" to
"norX" (X indexing the device numer) to better match the mtdparts
defaults.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Andreas Huber <andreas.huber@keymile.com>
introduce serial_exit for this purpose. Use it only when the rm9200
serial driver is active
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
The AT91RM9200-EK Evaluation Board supports the AT91RM9200
ARM9-based 32-bit RISC microcontroller and enables real-time code development
and evaluation.
Here is the chip page on Atmel website:
http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3507
with
- NOR (cfi driver)
- DataFlash
- USB OHCI
- Net
- I2C (hard)
Signed-off-by: Ulf Samuelsson <ulf@atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
In set_ddr_laws() when we determined how much of the size requested
to be mapped was covered by the the first LAW we needed to recalculate
the size based on what was actually mapped.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Rename the pci header for FSL HW so we can move some prototypes
in there and stop doing explicit externs
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Mflash is fusion memory device mainly targeted consumer eletronic and
mobile phone.
Internally, it have nand flash and other hardware logics and supports
some different operation (ATA, IO, XIP) modes.
IO mode is custom mode for the host that doesn't have IDE interface.
(Many mobile targeted SoC doesn't have IDE bus)
This driver support mflash IO mode.
Followings are brief descriptions about IO mode.
1. IO mode based on ATA protocol and uses some custom command. (read
confirm, write confirm)
2. IO mode uses SRAM bus interface.
Signed-off-by: unsik Kim <donari75@gmail.com>
Fix problems introduced in commit
7b5611cdd1 [inka4x0: Add hardware
diagnosis functions for inka4x0] which redefined MSR_RI which is
already used on PowerPC systems.
Also eliminate redundant definitions in ps2mult.h. More cleanup will
be needed for other redundant occurrences though.
Signed-off-by: Detlev Zundel <dzu@denx.de>
Legacy NAND is marked for feature removal after April 2009 (i.e. this
upcoming release). There are still several boards that reference it
(though many do so only for disk-on-chip support which has been silently
disabled for a while now). These boards will now fail to build
with #error, though the code is still there if the user removes #error.
The plan is to remove the code outright in the next release, along with
any board code that refers to it (such as board/esd/common/auto_update.c).
Also, remove the legacy NAND API description from README.nand.
Signed-off-by: Scott Wood <scottwood@freescale.com>
I can't find anywhere in the datasheet that says the status register needs
3 dummy bytes sent to it before being able to read back the first real
result. Tests on a Blackfin board show that after writing the opcode, the
status register starts coming back immediately. So only write out the
read status register opcode before polling the result.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Jason McMullan <mcmullan@netapp.com>
CC: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Since timeouts are only hit when there is a problem in the system, we
don't want to prematurely timeout on a functioning setup. Thus having
low timeouts (in milliseconds) doesn't gain us anything in the production
case, but rather increases likely hood of causing problems where none
otherwise exist.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
CC: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Some SPI flash drivers like to have extended id information available
(like the spansion flash), so rather than making it re-issue the ID cmd
to get at the last 2 bytes, have the common code read 5 bytes rather than
just 3. This also matches the Linux behavior where it always reads 5 id
bytes from all flashes.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
CC: Mingkai Hu <Mingkai.hu@freescale.com>
The common SPI flash code reads the idcode and passes it down to the SPI
flash driver, so there is no need to read it again ourselves.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
CC: Jason McMullan <mcmullan@netapp.com>
CC: TsiChung Liew <Tsi-Chung.Liew@freescale.com>
Add MTD SPI Flash support for S25FL008A, S25FL016A,
S25FL032A, S25FL064A, S25FL128P.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
The Blackfin SDH controller is still using the legacy framework, so update
the driver to use the renamed functions.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This patch fix the compiler/linker errors
common/cmd_i2c.c:1252: undefined reference to `i2c_get_bus_speed'
common/cmd_i2c.c:1256: undefined reference to `i2c_set_bus_speed'
if board use CONFIG_I2C_CMD_TREE and CONFIG_I2C_MULTI_BUS is not
uesd/undef (wrong define order)
and
removes additional empty lines
Signed-off-by: Jens Scharsig <esw@bus-elektronik.de>
There is a workaround for MPC8569 CPU Errata, which needs to set Bit 13 of
LBCR in 4K bootpage. We setup a temp TLB for eLBC controller in bootpage,
then invalidate it after LBCR bit 13 is set.
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
For the silicon which doesn't have ROM support in QE, it always needs to load
a pre-built ucode binary to IRAM so that QE can work.
Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Signed-off-by: Hillel Avni <Hillel.Avni@freescale.com>
cs8900.c: In function 'eth_init':
cs8900.c:164: warning: passing argument 2 of 'eth_getenv_enetaddr' from incompatible pointer type
cs8900.c:165: error: invalid operands to binary <<
cs8900.c:166: error: invalid operands to binary <<
cs8900.c:167: error: invalid operands to binary <<
Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
The NAND flash on the TQM8548_BE modules requires a short delay after
running the UPM pattern like the MPC8360ERDK board does. The TQM8548_BE
requires a further short delay after writing out a buffer. Normally the
R/B pin should be checked, but it's not connected on the TQM8548_BE.
The corresponding Linux FSL UPM driver uses similar delay points at the
same locations. To manage these extra delays in a more general way, I
introduced the "wait_flags" field allowing the board-specific driver to
specify various types of extra delay.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
For the NAND chips on the TQM8548 modules, a special chip-select logic is
used. It uses dedicated address lines to be set via UPM machine address
register (mar). This patch adds such support to the FSL-UPM driver.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Todor I Mollov
Wolfgang Denk
Andreas Huber
Sascha Hauer
Jean-Christophe PLAGNIOL-VILLARD
Ulf Samuelsson
Kumar Gala
unsik Kim
Detlev Zundel
Scott Wood
Mike Frysinger
Mingkai Hu
Jens Scharsig
Haiying Wang
Ladislav Michl
Wolfgang Grandegger