Enable LCDC deferred io on Migo-R using 1s delay.

As with other deferred io frame buffers user space code should
use fsync() on the frame buffer device to trigger an update.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch adds sh_mobile_lcdcfb deferred io support for SYS panels.

The LCDC hardware block managed by the sh_mobile_lcdcfb driver supports
RGB or SYS panel configurations. SYS panels come with an external display
controller that is resposible for refreshing the actual LCD panel. RGB
panels are controlled directly by the LCDC and they need to be refreshed
by the LCDC hardware.

In the case of SYS panels we can save some power by configuring the LCDC
hardware block in one-shot mode. In this one-shot mode panel refresh is
managed by software. This works well together with deferred io since it
allows us to stop clocks for most of the time and only enable clocks when
we actually want to trigger an update. When there is no fbdev activity
the clocks are kept stopped which allows us to deep sleep.

The refresh rate in deferred io mode is set using platform data. The same
platform data can also be used to disable deferred io mode.

As with other deferred io frame buffers user space code should use fsync()
on the frame buffer device to trigger an update.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Extend the deferred io code from only supporting vmalloc()ed frame
buffer memory to support both vmalloc()ed and physically contiguous
frame buffer memory.

The sh_mobile_lcdcfb hardware does not support scatter gather so
we need physically contiguous memory to back our frame buffer.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Acked-by: NJaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Make sure the mmap callback is set to NULL in the deferred io
cleanup function. This way we can enable and disable deferred
io on the fly.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Acked-by: NJaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

If CONFIG_FB_DEFERRED_IO is set, but there are framebuffers
registered that does not make use of deferred io, then fsync()
on those framebuffers will result in a crash. Fix that.

This is needed for sh_mobile_lcdcfb since we always enable
deferred io at compile time but we may disable deferred io
for some types of hardware configurations.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Acked-by: NJaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Add LCDC interrupt resources for AP325 and Migo-R. The LCDC driver does
not require interrupts at this point, but changes such as one-shot SYS
mode using deferred io, and wait-for-vblank will both need this.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Since the sh_mobile_lcdc hardware has the framebuffer(s) in system RAM,
use FB_SYS instead of FB_CFB. Also hook in read and write helpers.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Split pages returned by dma_alloc_coherent() and make sure
we free them one by one.
Signed-off-by: NMagnus Damm <damm@igel.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

There are no more users for this code, and it has been deprecated for
some time, so just kill it off.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

We don't really want this enabled by default, but it is still quite
useful for debugging. So, make it conditional and leave it off by
default.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This enables the same functionality that sh64 has for sh32. When running
on simulated hardware or via remote memory via the debug interface,
memory is gauranteed to be zero on boot already, and skipping the zeroing
of BSS has measurable boot time benefits.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

The sh cpufreq driver is no longer limited to just the SH-3 and SH-4,
update the documentation to reflect this fact accordingly.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

While no one should be including this file multiple times, flag it
inline anyways just in case.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

sci_poll_put_char() happens to also be used by the serial console,
while sci_poll_get_char() is only used by CONFIG_CONSOLE_POLL. Add
another gnarly ifdef to shut up the compiler.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Now that the rest of the boards that were using cf-enabler "generically"
have switched to setting up their mappings on their own, only the mach-se
boards were left using it. All of the cf-enabler using mach-se boards
use a special initialization of the MRSHPC windows rather than going
through the special PTE as other SH-4 platforms do. This consolidates
the MRSHPC setup logic, hooks it up on the boards that care, and gets rid
of any and all remaining references to cf-enabler.

This has been long overdue, as cf-enabler has been the bane of
arch/sh/kernel for the last 7 years. Good riddance.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This makes the microdev code a bit more readable, and moves the
setup for the SuperIO out on its own.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This also fixes up a long-standing bug for this platform where the PIO
base was set to a register offset, rather than the actual PIO offset
itself.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This gets rid of the cf enabler use on mach-sh03 and switches to use
pata_platform with the proper address directly. cf_enabler is
subsequently disabled for mach-sh03.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Drop the special mv_ioport_map() implementation, as this can simply use
__set_io_port_base() directly.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This can use the same implementation as sh64, the generated assembly is
the same between the new and old version, so there is not much point in
leaving it open coded in inline assembly.

This is preparatory work for future consolidation of the _32/_64
variants.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Nothing is using this any more, so get rid of it before anyone gets the
bright idea to start using it again.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

These can use the generic code instead.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

With the reworked kgdb support, we always detach and reinitialize the
stub. This was mostly a feature for handoffs between sh-ipl+g and the
kgdb stub, but virtually no sh-ipl+g versions ever had this working
right in the first place.

Given that the sh-ipl+g stubs in general use today don't even support
the GDB stub, and we have already killed off the special casing in the
sh-sci serial driver, kill off this now unused symbol too.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This patch improves the oprofile support on sh and adds backtrace
support.
Signed-off-by: NDave Peverley <dpeverley@mpc-data.co.uk>
Signed-off-by: NChris Smith <chris.smith@st.com>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

This re-implements the old op_model_null code in to something more
generic, where multiple drivers, backtrace, etc. can all be interfaced.
Based largely on arch/mips/oprofile/common.c.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

After the recent changes to switch SuperH board support over to irq_chip
it is now possible to set GENERIC_HARDIRQS_NO__DO_IRQ for all SuperH
boards.
Signed-off-by: NMatt Fleming <mjf@gentoo.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

I've been unable to even compile-test this change because I don't have
an sh5 toolchain. All uses of hw_interrupt_type for SuperH boards have
now been converted to use irq_chip.
Signed-off-by: NMatt Fleming <mjf@gentoo.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Switch the dreamcast IRQ code over to the irq_chip way of doing things,
so that we can set GENERIC_HARDIRQS_NO__DO_IRQ for all SuperH boards.

Also, whilst I'm here change some things to make checkpatch.pl happy:
	- Indent with tabs, not with spaces
	- Include <linux/io.h>, not <asm/io.h>
	- Fix the multi-line comment style
	- Fix some typos in the comments
Tested-by: NAdrian McMenamin <adrian@newgolddream.dyndns.info>
Signed-off-by: NMatt Fleming <mjf@gentoo.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

... as part of the hw_interrupt_type to irq_chip crusade.
Signed-off-by: NMatt Fleming <mjf@gentoo.org>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>