Commit graph

52 commits

Author SHA1 Message Date
Mike Frysinger
aad4eca4ba Blackfin: audit UART for all known anomalies
There is no code change here, just new comments, but this keeps me from
having to do another audit from scratch in the future.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:49 -04:00
Mike Frysinger
8ef929afa4 Blackfin: add check for anomaly 05000362
DESCRIPTION:
The column address width settings for banks 2 and 3 are misconnected in
the SDRAM controller.  Accesses to bank 2 will result in an error if the
Column Address Width for bank 3 (EB3CAW ) is not set to be the same as
that of bank 2.

WORKAROUND:
If using bank 2, make sure that banks 2 and 3 have the same column address
width settings in the EBIU_SDBCTL register.  This must be the case
regardless of whether or not bank 3 is enabled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:48 -04:00
Mike Frysinger
c2e07449f5 Blackfin: add comment about anomaly 05000430 avoidance
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:48 -04:00
Mike Frysinger
48ab150925 Blackfin: add workaround for anomaly 05000242
DESCRIPTION:
If the DF bit is set prior to a hardware reset, the PLL will continue to
divide CLKIN by 2 after the hardware reset, but the DF bit itself will be
cleared in the PLL_CTL register.

WORKAROUND:
Reprogram the PLL with DF cleared if the desire is to not divide CLKIN by
2 after reset.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:48 -04:00
Mike Frysinger
ce1fe4ba6b Blackfin: add workaround for anomaly 05000171
DESCRIPTION:
The Boot ROM is executed at power up/reset and changes the value of the
SICA_IWR registers from their default reset value of 0xFFFF, but does not
restore them.

WORKAROUND:
User code should not rely on the default value of these registers.  Set
the desired values explicitly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-06 17:37:47 -04:00
Mike Frysinger
46ac352f0f Blackfin: do not delay on output bytes
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-02 06:42:13 -04:00
Mike Frysinger
ad9073211c Blackfin: fix crash when booting from external memory
When testing a u-boot binary that hasn't been booted from the bootrom, we
have to make sure the bootstruct structure has sane storage space.  If we
don't, the initcode will crash when it tries to dereference an invalid
pointer.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-04-02 06:41:56 -04:00
Mike Frysinger
74398b23f9 Blackfin: put memory into self-refresh before/after programming clocks
When initializing the core clocks, stick external memory into self-refresh.
This gains us a few cool things:
 - support suspend-to-RAM with Linux
 - reprogram clocks automatically when doing "go" on u-boot.bin in RAM
 - make sure settings are stable before flashing new version
 - finally fully unify initialize startup code path between LDR/non-LDR

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:55 -04:00
Mike Frysinger
d347d572ab Blackfin: do not program voltage regulator on parts that do not have one
Some newer Blackfins (like the BF51x) do not have an on-chip voltage
regulator, so do not attempt to program the memory as if it does.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:55 -04:00
Mike Frysinger
0d4f24b70f Blackfin: setup a sane default EBIU_SDBCTL for SDRAM controllers
If the board config does not specify an explicit EBIU_SDBCTL value, set it
up with sane values based on other configuration options.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:54 -04:00
Mike Frysinger
3986e981f5 Blackfin: handle reboot anomaly 432
Workaround anomaly 432:
The bfrom_SysControl() firmware function does not clear the SIC_IWR1
register before executing the PLL programming sequence.  Therefore, any
interrupt enabled in the SIC_IWR1 register prior to the call to
bfrom_SysControl() can prematurely terminate the idle sequence required
for the PLL to relock properly. SIC_IWR0 is properly handled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:54 -04:00
Mike Frysinger
7e1d212b6d Blackfin: kill off LDR jump block
The Boot ROM uses EVT1 as the entry point so set that rather than having
to use a tiny jump block in the default EVT1 location.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:54 -04:00
Mike Frysinger
a75fa148d6 Blackfin: simplify symbol_lookup() a bit
No need to skip a byte as the symbol table handles this.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:54 -04:00
Mike Frysinger
2decc2a8d1 Blackfin: mark bfin_reset static
The function is only used locally, so mark it static.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:52 -04:00
Mike Frysinger
e82b762f29 Blackfin: fix jtag console tstc
The jtag tstc operation was checking the hardware to see if data is
available from it (which is fine for the jtag getc operation), but the
higher layers need to know whether any data is available.  Since we have
to read up to 4 bytes at a time from the hardware, the higher layers need
to know they can consume the cached bytes as well.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-03-23 15:14:52 -04:00
Mike Frysinger
e1ffaee728 Blackfin: disable syscontrol code for now
Looks like the initcode updates fell out of order during my merges.  The
patch that really fixes up this code is part of power-on overhaul and so
is too large for merging at this point.  Instead, we can disable the code
as no currently in-tree board depends on it.  The next merge window will
fix things up properly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-21 19:23:20 -05:00
Mike Frysinger
f790ef6ff1 Blackfin: dynamically update UART speed when initializing
Previously, booting over the UART required the baud rate to be known ahead
of time.  Using a bit of tricky simple math, we can calculate the new board
rate based on the old divisors.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
2009-02-05 21:25:35 -05:00
Mike Frysinger
97f265f14f Blackfin: add support for fast SPI reads with Boot ROM
Newer Blackfin boot roms support using the fast SPI read command rather than
just the slow one.  If the functionality is available, then use it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-05 21:25:35 -05:00
Mike Frysinger
67619982bf Blackfin: check for reserved settings in DDR MMRs
Some bits of the DDR MMRs should not be set.  If they do, bad things may
happen (like random failures or hardware destruction).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-05 21:25:35 -05:00
Mike Frysinger
622a8dc095 Blackfin: set default voltage levels for BF538/BF539 parts
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-05 21:25:34 -05:00
Mike Frysinger
09dc6b0bbd Blackfin: use on-chip syscontrol() rom function when available
Newer Blackfin's have an on-chip rom with a syscontrol() function that needs
to be used to properly program the memory and voltage settings as it will
include (possibly critical) factory tested bias values.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-05 21:25:28 -05:00
Mike Frysinger
fdce83c108 Blackfin: rewrite cache handling functions
Take the cache flush functions from the kernel as they use hardware loops in
order to get optimal performance.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-02 12:24:44 -05:00
Mike Frysinger
6957a6209b Blackfin: enable --gc-sections
Start building all Blackfin boards with -ffunction-sections/-fdata-sections
and linking with --gc-sections.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-02 12:24:40 -05:00
Mike Frysinger
ee1d2001ea Blackfin: dont check baud if it wont actually get used
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-02-02 12:24:31 -05:00
Mike Frysinger
fe033ad6d0 Blackfin: fixup misc warnings such as printf's and missing casts
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:27:28 -05:00
Mike Frysinger
7633903bff Blackfin: allow serial console to be disabled
Some devices have no UART device pulled out, so allow people to disable the
driver completely in favor of other methods (like JTAG-console).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:15 -05:00
Mike Frysinger
36ea8e9ad1 Blackfin: support console-over-JTAG
The Blackfin JTAG has the ability to pass data via a back-channel without
halting the processor.  Utilize that channel to emulate a console.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:15 -05:00
Mike Frysinger
cf8f2efb5f Blackfin: handle new anomalies with reset
Workaround fun new anomalies related to software reset of the processor.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:15 -05:00
Mike Frysinger
b1e9435b64 Blackfin: pass RETX to Linux
Make sure we save the value of RETX at power on and then pass it on to the
kernel so that it can nicely debug a "double-fault-caused-a-reset" crash.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:15 -05:00
Mike Frysinger
b5eba3fafc Blackfin: clarify relocation comment during init
People often ask questions about the init process and when things go
from flash to relocated base, so clarify the comments a bit.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
95433f6d43 Blackfin: just set SP register directly during init
No need to set the SP register indirectly to the configured value when it
can be set directly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
51230e6e35 Blackfin: add portmuxing for UARTs on the BF51x
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
4f6a313240 Blackfin: respect CONFIG_CLKIN_HALF
As pointed out by Ivan Koryakovskiy, the initialization code was not
actually respecting the CONFIG_CLKIN_HALF option when configuring the
PLL_CTL register.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
dc2bfb0b58 Blackfin: use common memcpy routine during init
Rather than using a local custom memcpy function, just call the existing
optimized Blackfin version.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:14 -05:00
Mike Frysinger
be853bf86b Blackfin: overhaul i2c driver
The current Blackfin i2c driver does not work properly with certain devices
due to it breaking up transfers incorrectly.  This is a rewrite of the
driver and relocates it to the newer place in the source tree.

Also remove duplicated I2C speed defines in Blackfin board configs and
disable I2C slave address usage since it isn't implemented.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:13 -05:00
Mike Frysinger
05b75e4883 Blackfin: fix dcache handling when doing dma memcpy's
Our dcache invalidate function doesn't just invalidate, it also flushes.
So rename the function accordingly and fix the dma_memcpy() function so it
doesn't inadvertently corrupt the data destination.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:12 -05:00
Mike Frysinger
0332e4df71 Blackfin: minimize time cache is turned off when replacing cplb entries
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-01-28 13:26:10 -05:00
Timur Tabi
ecf5f077c8 i2c: merge all i2c_reg_read() and i2c_reg_write() into inline functions
All implementations of the functions i2c_reg_read() and
i2c_reg_write() are identical. We can save space and simplify the
code by converting these functions into inlines and putting them in
i2c.h.

Signed-off-by: Timur Tabi <timur@freescale.com>
Acked-By: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-12-15 23:46:21 +01:00
Mike Frysinger
f177f4250c Blackfin: fix up UART status bit handling
Some Blackfin UARTs are read-to-clear while others are write-to-clear.
This can cause problems when we poll the LSR and then later try and handle
any errors detected.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:51 -04:00
Mike Frysinger
bd33e5c613 Blackfin: small cpu init optimization while setting interrupt mask
Use the sti instruction to set the initial interrupt mask rather than
banging on the core IMASK MMR to save both space and time.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:51 -04:00
Mike Frysinger
960922291c Blackfin: set initial stack correctly according to Blackfin ABI
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:51 -04:00
Mike Frysinger
25cd33d82e Blackfin: make baud calculation more accurate
We should use the algorithm in the Linux kernel so that the UART divisor
calculation is more accurate.  It also fixes problems on some picky UARTs
that have sampling anomalies.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:51 -04:00
Mike Frysinger
0ba1da116e Blackfin: decode hwerrcause/excause when crashing
Having to decode hwerrcause/excause values is a pain, so automate it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
2de95bb20c Blackfin: fix register dump messages
Make sure we report RETI/IPEND correctly.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
7133999e6f Blackfin: don't bother displaying reboot msg when crashing
The hang function already tells you to reboot, so no point in showing it
twice.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
70c4c032ea Blackfin: enable support for nested interrupts
During cpu init, make sure we initialize the CEC properly so that
interrupts can fire and be handled while U-Boot is running.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
2c1ea9e370 Blackfin: drop unused cache flush code
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
50f0d21191 Blackfin: unify cache handling code
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Mike Frysinger
e4337968e4 Blackfin: only enable hardware error irq by default
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2008-10-23 05:03:50 -04:00
Jean-Christophe PLAGNIOL-VILLARD
6d0f6bcf33 rename CFG_ macros to CONFIG_SYS
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2008-10-18 21:54:03 +02:00