Commit graph

63 commits

Author SHA1 Message Date
Mike Frysinger
1f003cf473 Blackfin: reset watchdog in udelay()
All arches apparently should reset the watchdog in their udelay loop as
noted on the mailing list recently:

  > A comment in flash_status_check() suggests that udelay() is
  > expected to reset the watchdog, but I can't find any architecture
  > where it does.

  If this is missing in other architectures, it should be fixed at the
  root cause, i. e. in udelay() or in the respective support routines.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-13 21:48:52 -04:00
Mike Frysinger
9c46e71af2 Blackfin: use scratch pad for exception stack
If the memory layout pushes the stack out of the default DCPLB coverage,
the exception handler may trigger a double fault by trying to push onto
the uncovered stack.  So handle the exception stack similar to the kernel
by using the top of the scratch pad SRAM.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-09-02 05:58:38 -04:00
Mike Frysinger
490fe73491 Blackfin: split cpu COBJS into multilines
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-07-18 21:15:54 -04:00
Mike Frysinger
909878fd3f Blackfin: add os log functions
Part of the mini Blackfin ABI with operating systems is that they can use
0x4f0-0x4f8 to pass log buffers to/from bootloaders.  So add support to
U-Boot for reading the log buffer.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-07-18 21:15:50 -04:00
Jean-Christophe PLAGNIOL-VILLARD
52cb4d4fb3 stdio/device: rework function naming convention
So far the console API uses the following naming convention:

	======Extract======
	typedef struct device_t;

	int	device_register (device_t * dev);
	int	devices_init (void);
	int	device_deregister(char *devname);
	struct list_head* device_get_list(void);
	device_t* device_get_by_name(char* name);
	device_t* device_clone(device_t *dev);
	=======

which is too generic and confusing.

Instead of using device_XX and device_t we change this
into stdio_XX and stdio_dev

This will also allow to add later a generic device mechanism in order
to have support for multiple devices and driver instances.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Edited commit message.

Signed-off-by: Wolfgang Denk <wd@denx.de>
2009-07-18 00:27:46 +02:00
Vivi Li
63cb0f4eb2 Blackfin: bump up default JTAG console timeout
The debug tools that interface with the other side of the JTAG console
got much slower when generalizing things, so bump up the default timeout
value on the U-Boot side to cope.  Hopefully at some point we can improve
the debug tools to speed things back up.

Signed-off-by: Vivi Li <vivi.li@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-15 13:30:08 -04:00
Mike Frysinger
ecb1dc8922 Add support for Linux-like kallsysms
The kernel stores address<->symbol names in it so things can be decoded at
runtime.  Do it in U-Boot, and we get nice symbol decoding when crashing.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-06-12 20:45:48 +02:00
Graf Yang
ec01481ddc Blackfin: fix timer_init()/timer_reset()
The timer_init() function was not using the right csync instruction, nor
was it doing it right after disabling the core timer.

The timer_reset() function would reset the timestamp, but not the actual
timer, so there was a common edge case where get_timer() return a jump of
one timestamp (couple milliseconds) right after resetting.  This caused
many functions to improperly timeout right away.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-05-19 04:57:33 -04:00
Mike Frysinger
f58bf804a1 Blackfin: avoid get_sclk() with early serial debug
When the clock functions were changed to use cached values (and thereby
avoiding expensive math functions), early serial debug broke because the
baud programming is called before external memory is available.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-05-06 08:47:27 -04:00
Mike Frysinger
02778f2f1b Blackfin: fix booting with older bootroms (no EVT1)
When dropping jump block support, the assumption was that all bootroms
supported entry point redirection via the EVT1 register.  Unfortunately,
this turned out to be incorrect for the oldest Blackfin parts (BF533-0.2
and older and BF561).  No one really noticed earlier because these parts
usually are booted by bypassing the bootrom entirely, and older BF533
parts are not supported at all (too many anomalies).

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-05-06 08:47:21 -04:00
Mike Frysinger
af2c37378f Blackfin: recurse with early serial initcode
Make sure we recurse through serial_putc() rather than bang on the UART
transmit register directly to avoid hardware overflows when using \n.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-05-06 08:47:16 -04:00
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