Commit Graph

8 Commits

Author SHA1 Message Date
Helge Deller 992378a064 [PARISC] fix section mismatch warnings in harmony sound driver
fix for two warnings:
- Section mismatch: reference to .init.text:snd_harmony_mixer_init from .text.snd_harmony_probe after 'snd_harmony_probe'
- Section mismatch: reference to .init.text:snd_harmony_mixer_reset from .text.snd_harmony_mixer_init after 'snd_harmony_mixer_init'

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2007-02-17 01:19:12 -05:00
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00
Takashi Iwai 67b1020d88 [ALSA] Remove xxx_t typedefs: PARISC Harmony
Modules: PARISC Harmony driver

Remove xxx_t typedefs from the PARIC Harmony driver.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-01-03 12:20:09 +01:00
Takashi Iwai 03f9ae2505 [ALSA] harmony - Code clean up
Modules: PARISC Harmony driver

Clean up snd-harmony driver code:

- Give standard module options
- Fix spinlocks
- Fix the error path of request_irq()
- Clean up redundant codes

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-01-03 12:16:52 +01:00
Stuart Brady 3a16568016 [PARISC] Update harmony from parisc tree
o Added a control for the input source (which can be either
  "line" or "mic")

o Mute the speaker/line-out/headphone outputs by default.

o Increased the buffer size from 10 pages to 16.

Signed-off-by: Stuart Brady <sdb@parisc-linux.org>

ALSA Harmony was resetting the capture position when
preparing the capture substream, which it shouldn't do.
This should fix the problem.

Signed-off-by: Stuart Brady <sdb@parisc-linux.org>

ALSA Harmony should no longer play junk (left in the buffers
from a previous stream) at the start of a new stream.

Implement the monitor mixer channel for ALSA Harmony.

Also prevent snd_harmony_volume_get from returning negative values.

Signed-off-by: Stuart Brady <sdb@parisc-linux.org>

Use the graveyard/silence buffers in ALSA Harmony.

Signed-off-by: Stuart Brady <sdb@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2005-10-21 22:42:38 -04:00
Matthew Wilcox 53f01bba49 [PARISC] Convert parisc_device to use struct resource for hpa
Convert pa_dev->hpa from an unsigned long to a struct resource.

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

Fix up users of ->hpa to use ->hpa.start instead.

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
2005-10-21 22:36:40 -04:00
Takashi Iwai a76af199dc [ALSA] Add snd_card_set_dev()
ARM AACI PL041 driver,PARISC Harmony driver
Added snd_card_set_dev() calls to register the device pointer for the card.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2005-09-12 10:41:33 +02:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00