Provide a generic SRAM allocator using genalloc, and vaguely
modeled after what AVR32 uses. This builds on top of the
static CPU mapping set up in the previous patch, and returns
DMA mappings as requested (if possible).
Compared to its OMAP cousin, there's no current support for
(currently non-existent) DaVinci power management code running
in SRAM; and this has ways to deallocate, instead of being
allocate-only.
The initial user of this should probably be the audio code,
because EDMA from DDR is subject to various dropouts on at
least DM355 and DM6446 chips.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Package on-chip SRAM. It's always accessible from the ARM, so
set up a standardized virtual address mapping into a 128 KiB
area that's reserved for platform use.
In some cases (dm6467) the physical addresses used for EDMA are
not the same as the ones used by the ARM ... so record that info
separately in the SOC data, for chips (unlike the OMAP-L137)
where SRAM may be used with EDMA.
Other blocks of SRAM, such as the ETB buffer or DSP L1/L2 RAM,
may be unused/available on some system. They are ignored here.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Remove remnants of dm6446-specific SRAM allocator, as preparation for
a more generic replacement.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Different SoC have different numbers of pinmux registers and other
resources that overlap with each other. To clean up the code and
eliminate defines that overlap with each other, move the PINMUX
defines to the SoC specific files.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The Timer64p timer has 8 compare registers that can
be used to generate interrupts when the timer value
matches the compare reg's value. They do not disturb
the timer itself. This can be useful when there is
only one timer available for both clock events and
clocksource.
When enabled, the clocksource remains a continuous
32-bit counter but the clock event will no longer
support periodic interrupts. Instead only oneshot
timers will be supported and implemented by setting
the compare register to the current timer value plus
the period that the clock event subsystem is requesting.
Compare registers support is enabled automatically
when the following conditions are met:
1) The same timer is being used for clock events
and clocksource.
2) The timer is the bottom half (32 bits) of the
64-bit timer (hardware limitation).
3) The the compare register offset and irq are
not zero.
Since the timer is always running, there is a hardware
race in timer32_config() between reading the current
timer value, and adding the period to the current
timer value and writing the compare register.
Testing on a da830 evm board with the timer clocked
at 24 MHz and the processor clocked at 300 MHz,
showed the number of counter ticks to do this ranged
from 20-53 (~1-2.2 usecs) but usually around 41 ticks.
This includes some artifacts from collecting the
information. So, the minimum period should be
at least 5 usecs to be safe.
There is also an non-critical lower limit that
the period should be since there is no point in
setting an event that is much shorter than the
time it takes to set the event, and get & handle
the timer interrupt for that event. There can
also be all sorts of delays from activities
occuring elsewhere in the system (including
hardware activitis like cache & TLB management).
These are virtually impossible to quantify so a
minimum period of 50 usecs was chosen. That will
certianly be enough to avoid the actual hardware
race but hopefully not large enough to cause
unreasonably course-grained timers.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Integrate the Common Platform Interrupt Controller (cp_intc)
support into the low-level irq handling for davinci and similar
platforms. Do it such that support for cp_intc and the original
aintc can coexist in the same kernel binary.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Factor out the code to extract that mac address from
i2c eeprom.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The dm644x and dm646x board files have i2c eeprom read and
write routines but they are not used so remove them.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Since most of the emac platform_data is really SoC specific
and not board specific, move it to the SoC-specific files.
Put a pointer to the platform_data in the soc_info structure
so the board-specific code can set some of the platform_data
if it needs to.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Currently, there is one set of platform_device and platform_data
structures for all DaVinci SoCs. The differences in the data
between the various SoCs is handled by davinci_serial_init()
by checking the SoC type. However, as new SoCs appear, this
routine will become more & more cluttered.
To clean up the routine and make it easier to add support for new
SoCs, move the platform_device and platform_data structures into the
SoC-specific code and use the SoC infrastructure to provide access
to the data.
In the process, fix a bug where the wrong irq is used for uart2
of the dm646x.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The current gpio code needs to know the number of
gpio irqs there are and what the bank irq number is.
To determine those values, it checks the SoC type.
It also assumes that the base address and the number
of irqs the interrupt controller uses is fixed.
To clean up the SoC checks and make it support
different base addresses and interrupt controllers,
have the SoC-specific code set those values in
the soc_info structure and have the gpio code
reference them there.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The watchdog code currently hardcodes the base address
of the timer its using. To support new SoCs, make it
support timers at any address. Use the soc_info structure
to do this.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The davinci timer code currently hardcodes the timer register
base addresses, the timer irq numbers, and the timers to use
for clock events and clocksource. This won't work for some
a new SoC so put those values into the soc_info structure
and set them up in the SoC-specific files.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Use the SoC infrastructure to hold the interrupt controller
information (i.e., base address, default priorities,
interrupt controller type, and the number of IRQs).
The interrupt controller base, although initially put
in the soc_info structure's intc_base field, is eventually
put in the global 'davinci_intc_base' so the low-level
interrupt code can access it without a dereference.
These changes enable the SoC default irq priorities to be
put in the SoC-specific files, and the interrupt controller
to be at any base address.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The pinmux register base and setup can be different for different
SoCs so move the pinmux reg base, pinmux table (and its size) to
the SoC infrastructure.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The current code to support the DaVinci Power and Sleep Controller (PSC)
assumes that there is only one controller. This assumption is no longer
valid so expand the support to allow greater than one PSC.
To accomplish this, put the base addresses for the PSCs in the SoC
infrastructure so it can be referenced by the PSC code. This also
requires adding an extra parameter to davinci_psc_config() to specify
the PSC that is to be enabled/disabled.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
All of the davinci SoCs need to call davinci_clk_init() so
put the call in the common init routine.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The Davinci cpu_is_davinci_*() macros use the SoC part number
and variant retrieved from the JTAG ID register to determine the
type of cpu that the kernel is running on. Currently, the code to
read the JTAG ID register assumes that the register is always at
the same base address. This isn't true on some newer SoCs.
To solve this, have the SoC-specific code set the JTAG ID register
base address in soc_info structure and add a 'cpu_id' member to it.
'cpu_id' will be used by the cpu_is_davinci_*() macros to match
the cpu id. Also move the info used to identify the cpu type into
the SoC-specific code to keep all SoC-specific code together.
The common code will read the JTAG ID register, search through
an array of davinci_id structures to identify the cpu type.
Once identified, it will set the 'cpu_id' member of the soc_info
structure to the proper value and the cpu_is_davinci_*() macros
will now work.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Create a structure to encapsulate SoC-specific information.
This will assist in generalizing code so it can be used by
different SoCs that have similar hardware but with minor
differences such as having a different base address.
The idea is that the code for each SoC fills out a structure
with the correct information. The board-specific code then
calls the SoC init routine which in turn will call a common
init routine that makes a copy of the structure, maps in I/O
regions, etc.
After initialization, code can get a pointer to the structure
by calling davinci_get_soc_info(). Eventually, the common
init routine will make a copy of all of the data pointed to
by the structure so the original data can be made __init_data.
That way the data for SoC's that aren't being used won't consume
memory for the entire life of the kernel.
The structure will be extended in subsequent patches but
initially, it holds the map_desc structure for any I/O
regions the SoC/board wants statically mapped.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Add support for DM646x SoC (a.k.a DaVinci HD) and its Evalution
Module (EVM.)
Original support done by Sudhakar Rajashekhara.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
In addition, add board support for the DM355 Evaluation Module (EVM)
and the DM355 Leopard board.
Original DM355 EVM support done by Sandeep Paulraj, with significant
updates and improvements by David Brownell. DM355 Leopord support
done by Koen Kooi.
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Koen Kooi <koen@beagleboard.org>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Add support for Texas Instuments Common Platform Interrupt Controller
(cp_intc) used on DA830/OMAP-L137.
Signed-off-by: Steve Chen <schen@mvista.com>
Signed-off-by: Mark Greer <mgreer@mvista.com>
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The davinci pre-kernel boot code assumes that all platforms use the
same UART base address for the console. That assumption is not longer
valid with some newer SoCs so determine the console UART base address
from the machine number passed in from bootloader.
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This patch defines debug macros for low-level debugging for Davinci
based platforms
Tested on :
- DM644x DaVinci EVM
- DM646X DaVinciHD EVM
- DM355 EVM
This patch attempts to solve the low-level debug issue in DM646x. The
UART on DM646x SoC allows only 32-bit access. The existing
debug-macro.S uses the macros from debug-8250.S file. This led to
garbage serial out in the case of DM646x.
The inclusion of debug-8250.S does not allow for run time fix for this
issue. There are compile time errors due to multiple definitions of
the macros. Also when building a single image for multiple DaVinci
Platforms, the ifdefs cannot be relied upon.
The solution below does not include the debug-8250.S file and defines
the necessary macros. This solution was arrived at after observing
that word access does not affect the low-level debug messages on
DM644x/DM355.
The other approach to this issue is to use the UART module information
available in the peripheral registers to decide the access
mechanism. But this will have to be done for every access of UART
specifically for DM646x. Also this calls for a modification of the
debug-8250.S file.
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This patch seems to get me much more reliable performance using the
GPIO banked interrupts on dm355 for the dm9000 driver.
Changes include:
- init GPIO handling along with normal GPIO init
- mask the level-sensitive bank IRQ during handling
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Fix two IRQ triggering bugs affecting GPIO IRQs:
- Make sure enabling with IRQ_TYPE_NONE ("default, unspecified")
isn't a NOP ... default to both edges, at least one must work.
- As noted by Kevin Hilman, setting the irq trigger type for a
banked gpio interrupt shouldn't enable irqs that are disabled.
Since GPIO IRQs haven't been used much yet, it's not clear these
bugs could have affected anything. The few current users don't
seem to have been obviously suffering from these issues.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Remove the __initdata annotation for the clock lookups, since they
will be needed when loading modules which use clk_get().
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Remove the __initdata annotation for the clock lookups, since they
will be needed when loading modules which use clk_get().
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
pfn_valid() is meant to be able to tell if a given PFN has valid memmap
associated with it or not. In FLATMEM, it is expected that holes always
have valid memmap as long as there is valid PFNs either side of the hole.
In SPARSEMEM, it is assumed that a valid section has a memmap for the
entire section.
However, ARM and maybe other embedded architectures in the future free
memmap backing holes to save memory on the assumption the memmap is never
used. The page_zone linkages are then broken even though pfn_valid()
returns true. A walker of the full memmap must then do this additional
check to ensure the memmap they are looking at is sane by making sure the
zone and PFN linkages are still valid. This is expensive, but walkers of
the full memmap are extremely rare.
This was caught before for FLATMEM and hacked around but it hits again for
SPARSEMEM because the page_zone linkages can look ok where the PFN linkages
are totally screwed. This looks like a hatchet job but the reality is that
any clean solution would end up consumning all the memory saved by punching
these unexpected holes in the memmap. For example, we tried marking the
memmap within the section invalid but the section size exceeds the size of
the hole in most cases so pfn_valid() starts returning false where valid
memmap exists. Shrinking the size of the section would increase memory
consumption offsetting the gains.
This patch identifies when an architecture is punching unexpected holes
in the memmap that the memory model cannot automatically detect and sets
ARCH_HAS_HOLES_MEMORYMODEL. At the moment, this is restricted to EP93xx
which is the model sub-architecture this has been reported on but may expand
later. When set, walkers of the full memmap must call memmap_valid_within()
for each PFN and passing in what it expects the page and zone to be for
that PFN. If it finds the linkages to be broken, it assumes the memmap is
invalid for that PFN.
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Having discussed broadcast tick support with Thomas Glexiner, the
broadcast tick devices should be registered with a higher rating
than the global tick device, and it should have the ONESHOT and
PERIODIC feature flags set.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Thomas Glexiner <tglx@linutronix.de>
smp_cross_call_done() is a no-op for MPCore, and since it's only
used by platform code, there's no point in having it unless it's
doing something.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
The ARM SMP code wasn't properly updated for the cpumask changes, which
results in smp_timer_broadcast() broadcasting ticks to non-online CPUs.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Compilation for this board yields the following errors:
arch/arm/mach-pxa/viper.c:511: error: 'FFUART' undeclared here (not in a function)
arch/arm/mach-pxa/viper.c:520: error: 'BTUART' undeclared here (not in a function)
arch/arm/mach-pxa/viper.c:529: error: 'STUART' undeclared here (not in a function)
Fix them by including the necessary header.
Signed-off-by: Ricardo Martins <rasm@fe.up.pt>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Fix the clkdev API support for the ep93xx uart clocks.
The uarts available in the ep93xx have individual clock controls.
The current implementation assumes that the bootloader has enabled
the clocks before the kernel has booted. It also assumes that the
bootloader has set the UARTBAUD bit indicating that the uarts are
running off the 14.7456MHz external crystal.
This fixes both issues. It also allows the uart clocks to be stopped
when there are no users.
Tested-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Cc: Ryan Mallon <ryan@bluewatersys.com>
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This makes the framebuffer work on omap3.
Also fix the clk_get usage for checkpatch.pl
"ERROR: do not use assignment in if condition".
Cc: Imre Deak <imre.deak@nokia.com>
Cc: linux-fbdev-devel@lists.sourceforge.net
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
The OMAP3430ES2_SAVEANDRESTORE_SHIFT macro is used
by powerdomain code in
"1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT" manner, but
the definition was also (1 << 4), meaning we actually
modified bit 16. So the definition needs to be 4.
This fixes also a cold reset HW bug in OMAP3430 ES3.x
where some of the efuse bits are not isolated during
wake-up from off mode. This can cause randomish
cold resets with off mode. Enabling the USBTLL hardware
SAVEANDRESTORE causes the core power up assert to be
delayed in a way that we will not get faulty values
when boot ROM is reading the unisolated registers.
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
As per 3430 TRM, there are 6 banks [0 to 191]
Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
