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)
Remove IPGA volume controls and merge the IPGA range to ADC volume
controls. These two volumes are not really independent but connected
simply in different ranges 0-0x7f and 0x80-max. It doesn't make sense
to provide two controls.
Since both 0x7f and 0x80 specify 0dB, a hack is needed for IPGA range
to skip 0x80 (increment one) for such controls.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Added the dB scale information to each board support code of ice1724 driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Added the dB scale information for native digital volumes of ice1712 driver.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
- Clean up the code in AK4xxx-ADDA i2c code.
- Fix capture gain controls for AK5365
- Changed the static table for DAC/ADC mixer labels to use
structs
- Implemented TLV entries for each AK codec
The volumes in AK4524, AK4528 and AK5365 are corrected with
a table to be suitable for dB conversion.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Complete the AK5365 support.
This adds a boolean control to toggle the soft mute feature of the
AK5365 chip.
Signed-off-by: Jochen Voss <voss@seehuhn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Enable capture support for the M-Audio Revolution 5.1 card,
by registering the ADC with ALSA.
Signed-off-by: Jochen Voss <voss@seehuhn.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Fixed 'section mismatch' errors in ALSA PCI drivers:
- removed invalid __devinitdata from pci id tables
- fix/remove __devinit of functions called in suspend/resume
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Fix the driver string name for Terratec Aureon 7.1 Universe
to fit in 15 letters to avoid the overflow.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This patch adds stereo controls to revo cards by making the ak4xxx
driver mixers configurable from the card driver.
Signed-off-by: Jani Alinikula <janialinikula@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
To permit use, in ice1712, of the mpu401 info flags recently added to
mpu401_uart, adds info_flags in snd_ice1712_card_info so that additional
flags can be set, if desired. 'MPU401_INFO_INTEGRATED' is always set with
the ice1712. The flags are passed on to snd_mpu401_uart_new().
_INFO_OUTPUT is set for DMX6fire mpu2.
Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch adds support for useable front audio channels,
user controllable headphone channel and optical output.
From: Anho Ki
Signed-off-by: Matt Taylor <mwtaylor@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Consumer AC97 is not used by the Terratec DMX6fire, but eeprom bit indicates
it is; change the stored value to disable failing consumer mode.
Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Change the 5th argument of snd_mpu401_uart_new() to bit flags
instead of a boolean. The argument takes bits that consist of
MPU401_INFO_XXX flags.
The callers that used the value 1 there are replaced with
MPU401_INFO_INTEGRATED.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Patch provides for the ice1712 card driver to overwrite the midi port name
string given by default in mpu401_uart, with one specified in
snd_ice1712_card_info.
Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
There's no reason for #include'ing linux/dma-mapping.h more than once.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch adds a mixer control which allows the user to switch the Aux
playback between the internal Aux jack, Wavetable, and Rear Line-In on
Aureon Universe cards.
For switching, a PCA9554 (8-line GPIO with I2C interface) and a 74HC4052
(dual 4-way mux/demux) are used. Output 0 and 1 of the PCA9554 are
connected to the select pins of the 74HC4052. The I2C interface of the
PCA9554 is connected to the card's internal SPI bus which is also used
to control the WM8770 and CS8415. SPI and I2C on the same lines...
To communicate with the PCA9554 the WM8770 and CS8415 are disabled and
an I2C Stop Condition is generated before the Start Condition (needed
for synchronisation because other SPI traffic appear to confuse the
PCA9554). Then a normal I2C data transfer takes place. Programming must
be done ridiculously slow; in theory, 4.7us is the minimum delay time
for normal-speed I2C according to the datasheet, but even with 10us
switching was unreliable. The Windows driver from Terratec does the
programming very slowly, too (checked with an oscilloscope).
PCA9554 datasheet:
http://www.semiconductors.philips.com/acrobat/datasheets/PCA9554_9554A_6.pdf
74HC4052 datasheet:
http://www.semiconductors.philips.com/acrobat/datasheets/74HC_HCT4052_4.pdf
Signed-off-by: Maximilian Rehkopf <otakon@gmx.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
I have just discovered I made an error in the register value set in 'Limit
dmx6fire to 6 dacs' patch (bug1472). The value set should be '2a' not '0a'
as in the original patch, which unintentionally disables the 2nd MPU 401
UART.
Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Replace all occurences of 0xff.. in calls to function pci_set_dma_mask()
and pci_set_consistant_dma_mask() with the corresponding DMA_xBIT_MASK from
linux/dma-mapping.h.
Signed-off-by: Matthias Gehre <M.Gehre@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This patch introduces the DMA_28BIT_MASK constant in dma-mapping.h
ALSA drivers using this mask are changed to use the new constant.
Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Jaroslav Kysela <perex@suse.cz>
Modules: ICE1712 driver
This patch makes two needlessly global functions static.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: ICE1712 driver
I posted this patch to bug 1806 a while back, and have been awaiting a
reply or commit. It currently reports the Locked/No Signal text
backwards in envy24control, since i was using an older version of
envy24control when I wrote the original code. The Locked/No Signal test
was recently reversed in envy24control cvs, so the test in my code needs
to be reversed as well. Here is the patch, once again.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: ICE1712 driver
Change the value written to hardware configuration register of envy24 chip
in the case of Terratec DMX6fire to restrict the active ADCs & DACs to 6.
Also add the dxr_enable module option to eventually leave the old behaviour
when user requests.
Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Semaphore to mutex conversion.
The conversion was generated via scripts, and the result was validated
automatically via a script as well.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Use schedule_timeout_{,un}interruptible() instead of
set_current_state()/schedule_timeout() to reduce kernel size. Also use
human-time conversion functions instead of hard-coded division to avoid
rounding issues.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Modules: ICE1724 driver
Remove the restcition of sample rates on Revolution 7.1 board.
This enables the low 8-44kHz sample rates.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
CMI8330 driver,ENS1370/1+ driver,FM801 driver,VIA82xx driver,AC97 Codec
ALI5451 driver,CS46xx driver,EMU10K1/EMU10K2 driver,HDA Codec driver
ICE1712 driver,ICE1724 driver
Where appropriate, use the SNDRV_CTL_NAME_IEC958 instead of a literal
string.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
David Howells