Add new structures and functions to handle AT91 SoC detection.

[alexandre.belloni@free-electrons.com: reworked DBGU detection]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NBoris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The matrix headers are not used anymore, remove them.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

at91_ioremap_matrix and the at91_matrix.h header are not used anymore, remove
them.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The mach/io.h header on at91 is used to support a nonstandard I/O space
window for the cf card driver. This changes the driver to use pci_ioremap_io
in order to have the standard location, and then removes the custom
mach/io.h.

[alexandre.belloni@free-electrons.com: Added PCI dependency]
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Flush data cache, and clean, invalidate and disable the L2 cache before going to suspend.
Restore the L2 cache configuration and re-enable the L2 cache after waking up.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Add the WFI instruction to make the cpu to the idle state.
In the meanwhile, disable the processor's clock.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Because the standby mode use the same sram function as the suspend to memory
mode, void (*at91_pm_standby)(void) doesn't need, remove it.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

As the file name is renamed, rename the function name at91_slow_clock()
--> at91_pm_suspend_sram_fn(), rename the function handler's name at the
same time.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
[nicolas.ferre@atmel.com: little update of the commit message]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Because the sram function is used for both suspend to memory and the suspend
to standby mode, renaming is more elegant.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

To simply the PM code, the suspend to standby mode uses same sram function
as the suspend to memory mode, running in the internal SRAM, instead of the
respective code for each mode.

For the suspend to standby mode, the master clock doesn't switch to the slow
clock, and PLLA and the main oscillator doesn't turn off as well.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

To decrease the suspend time, move copying the sram function to the sram
initialization phase, instead of every time go to suspend.

In the meanwhile, substitute fncpy() for memcpy().

If there is no sram allocated for PM, the PM is not supported.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

To decrease the duplicated code, create the procedure
to contain both activing and exiting the sdram self-refresh mode.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Assume USB PLL and PLL B are already stopped before entering sleep mode.

Removed PLL B from slow clock code, all drivers are supposed to properly
unprepare clocks.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: NWenyou.Yang <wenyou.yang@atmel.com>
[nicolas.ferre@atmel.com: remove the warning printed in pm.c]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The slow clock always exists, selecting CONFIG_AT91_SLOW_CLOCK config
is unnecessary for the suspend to memory mode.
For this mode the master clock should always switch to the slow clock.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

To simply the PM config the CONFIG_AT91_SLOW_CLOCK option will be removed,
so move "select SRAM" from under AT91_SLOW_CLOCK, add "select SRAM if PM"
under SOC_AT91SAM9 and SOC_SAMA5
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The SLOWDOWN_MASTER_CLOCK definition is not used, remove the redundant code.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Since at91_pm_set_standby() will not be used out of the pm.c file,
change its attribute from extern to static, remove its declaration as well.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Commit 2b0ba96c ("net: phy: micrel: disable NAND-tree for KSZ8021,
KSZ8031, KSZ8051, KSZ8081") automated the NAND-tree mode deactivation
process, thus making this phy fixup useless.
Remove it along with the associated headers inclusion.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: remove selection of PHYLIB in at91 Kconfig]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

When compiling the kernel in thumb2 (CONFIG_THUMB2_KERNEL option activated), we
hit a compilation crash. The error message is listed below:

---8< -----
Error: cannot use register index with PC-relative addressing -- `str r0,.saved_lpr'
--->8----

Add the .arm directive in the assembly files related to power management.
Signed-off-by: NWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Because writing the MOR register requires the PASSWD(0x37),
if missed, the write operation will be aborted.
Signed-off-by: NPatrice Vilchez <patrice.vilchez@atmel.com>
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

On some platforms, there are multiple SRAM nodes defined in the device tree but
some of them are disabled, leading to allocation failure. Try to find the first
enabled SRAM node and allocate from it.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Tested-by: NWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

at91rm9200 standby and suspend to ram has been broken since
00482a40. It is wrongly using AT91_BASE_SYS which is a physical address
and actually doesn't correspond to any register on at91rm9200.

Use the correct at91_ramc_base[0] instead.

Fixes: 00482a40 (ARM: at91: implement the standby function for pm/cpuidle)
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The DDRSDR controller fails miserably to put LPDDR1 memories in
self-refresh. Force the controller to think it has DDR2 memories
during the self-refresh period, as the DDR2 self-refresh spec is
equivalent to LPDDR1, and is correctly implemented in the
controller.

Assume that the second controller has the same fault, but that is
untested.
Signed-off-by: NPeter Rosin <peda@axentia.se>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Removed timeout on XTAL, PLL lock and Master Clock Ready, hang if
something went wrong instead of continuing in unknown condition. There
is not much we can do if a PLL lock never ends, we are running in SRAM
and we will not be able to connect back the sdram or ddram in order to
be able to fire up a message or just panic.

As a bonus, not decounting the timeout register in slow clock mode
reduce cumulated suspend time and resume time from ~17ms to ~15ms.
Signed-off-by: NSylvain Rochet <sylvain.rochet@finsecur.com>
Acked-by: NWenyou.Yang <wenyou.yang@atmel.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

of_device_ids (i.e. compatible strings and the respective data) are not
supposed to change at runtime. All functions working with of_device_ids
provided by <linux/of.h> work with const of_device_ids. So mark the
non-const structs in arch/arm as const, too.

While at it also add some __initconst annotations.
Acked-by: NJason Cooper <jason@lakedameon.net>
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Commit 20e783e3 ("ARM: 8296/1: cache-l2x0: clean up aurora cache
handling") removed the only user of the Kconfig symbol CACHE_PL310.
Setting CACHE_PL310 is now pointless. Remove its Kconfig entry, and one
select of this symbol.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

In a recent rearrangement of the at91 pm initialization code, a broken
set of declarations was added for the !CONFIG_PM-case, leading to
this link error:

arch/arm/mach-at91/board-dt-sama5.o: In function `at91_rm9200_pm_init':
arch/arm/mach-at91/generic.h:40: multiple definition of `at91_rm9200_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:40: first defined here
arch/arm/mach-at91/board-dt-sama5.o: In function `at91_sam9260_pm_init':
arch/arm/mach-at91/generic.h:41: multiple definition of `at91_sam9260_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:41: first defined here
arch/arm/mach-at91/board-dt-sama5.o: In function `at91_sam9g45_pm_init':
arch/arm/mach-at91/generic.h:42: multiple definition of `at91_sam9g45_pm_init'
arch/arm/mach-at91/setup.o:arch/arm/mach-at91/generic.h:42: first defined here

This adds the missing 'static inline' to the declarations to avoid
creating a copy of the functions in each file that includes the
header.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 4db0ba22 ("ARM: at91: pm: prepare for multiplatform")
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Remove the string "(Device Tree)" after the machine name because all AT91
machines use the DT nowadays.
Also change some function names to unify following the convention:
- at91sam9xxx aren't named sam9, 9xxx but with the full name
- sama5 are the ones that don't have the at91 prefix anymore.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Move the ramc initialization to pm.c as it is the only user left.
This allows us to get rid of at91_dt_initialize() that was the only one called
by the init_early() function pointer of struct machine_desc.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: adapt patch to newer series]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

As board files are now DT only and can address all aspects of the SoC family,
we can rename them so that the mach-at91 directory looks cleaner.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

at91_boot_soc and at91_init_soc structures are not used by any SoC, remove
their use. Also remove all the now empty SoC files.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: different organization of the patches]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

For sama5d4, remove an indirection and the remaining need for at91_boot_soc
structure.
This will allow further cleanup.
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Only use SOC_AT91SAM9 for all the at91sam9 SoCs. It removes all the empty
at91sam9xxx.c SoC files. It also removes the useless at91_init_soc affectation
procedure and its "init" function pointer.
Only the SoC detection and display are kept for the at91sam9:
at91_soc_is_enabled() and at91_boot_soc.map_io() function calls are also
removed.

It enables HAVE_AT91_SMD and HAVE_AT91_UTMI for all the sam9 SoCs but this only
represents 96 bytes of uncompressed kernel code.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: different organization of the patches]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

Setup arm_pm_idle and arm_pm_restart function pointers from
rm9200_dt_device_init() function to simplify the at91rm9200 initialization
process.
This same move is already done for the sam9s.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
[nicolas.ferre@atmel.com: adapt patch to newer series]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The SOC_AT91SAM9263 is being removed, stop using it.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

mach/system_rev.h is not used, remove it.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

In order to remove SOC_SAM9xxx options, stop using HAVE_AT91_DBGUx.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

The PM initialization needs internal SRAM for allocating a gen_pool and
use it to store its PM code. So we need to have of_platform_populate() before
this code.
Suggested-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

As all sam9 SoCs are setting arm_pm_idle to at91sam9_idle(), do it from
sam9_dt_device_init().
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Suggested-by: NArnd Bergmann <arnd@arndb.de>
[nicolas.ferre@atmel.com: adapt patch to newer series]
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>

sam9n12 and sam9x5 don't set arm_pm_idle because of an oversight, fix that.
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Suggested-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>