License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 08:07:57 -06:00
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// SPDX-License-Identifier: GPL-2.0
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2005-04-16 16:20:36 -06:00
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/*
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* Device driver for the PMU on 68K-based Apple PowerBooks
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*
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* The VIA (versatile interface adapter) interfaces to the PMU,
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* a 6805 microprocessor core whose primary function is to control
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* battery charging and system power on the PowerBooks.
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* The PMU also controls the ADB (Apple Desktop Bus) which connects
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* to the keyboard and mouse, as well as the non-volatile RAM
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* and the RTC (real time clock) chip.
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*
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* Adapted for 68K PMU by Joshua M. Thompson
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*
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* Based largely on the PowerMac PMU code by Paul Mackerras and
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* Fabio Riccardi.
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*
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* Also based on the PMU driver from MkLinux by Apple Computer, Inc.
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* and the Open Software Foundation, Inc.
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*/
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#include <stdarg.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/miscdevice.h>
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#include <linux/blkdev.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/adb.h>
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#include <linux/pmu.h>
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#include <linux/cuda.h>
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#include <asm/macintosh.h>
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#include <asm/macints.h>
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#include <asm/mac_via.h>
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#include <asm/pgtable.h>
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#include <asm/irq.h>
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2016-12-24 12:46:01 -07:00
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#include <linux/uaccess.h>
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2005-04-16 16:20:36 -06:00
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/* Misc minor number allocated for /dev/pmu */
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#define PMU_MINOR 154
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/* VIA registers - spaced 0x200 bytes apart */
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#define RS 0x200 /* skip between registers */
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#define B 0 /* B-side data */
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#define A RS /* A-side data */
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#define DIRB (2*RS) /* B-side direction (1=output) */
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#define DIRA (3*RS) /* A-side direction (1=output) */
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#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
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#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
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#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
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#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
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#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
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#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
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#define SR (10*RS) /* Shift register */
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#define ACR (11*RS) /* Auxiliary control register */
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#define PCR (12*RS) /* Peripheral control register */
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#define IFR (13*RS) /* Interrupt flag register */
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#define IER (14*RS) /* Interrupt enable register */
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#define ANH (15*RS) /* A-side data, no handshake */
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/* Bits in B data register: both active low */
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#define TACK 0x02 /* Transfer acknowledge (input) */
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#define TREQ 0x04 /* Transfer request (output) */
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/* Bits in ACR */
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#define SR_CTRL 0x1c /* Shift register control bits */
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#define SR_EXT 0x0c /* Shift on external clock */
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#define SR_OUT 0x10 /* Shift out if 1 */
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/* Bits in IFR and IER */
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#define SR_INT 0x04 /* Shift register full/empty */
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#define CB1_INT 0x10 /* transition on CB1 input */
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static enum pmu_state {
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idle,
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sending,
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intack,
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reading,
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reading_intr,
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} pmu_state;
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static struct adb_request *current_req;
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static struct adb_request *last_req;
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static struct adb_request *req_awaiting_reply;
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static unsigned char interrupt_data[32];
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static unsigned char *reply_ptr;
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static int data_index;
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static int data_len;
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static int adb_int_pending;
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static int pmu_adb_flags;
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2007-02-10 13:35:12 -07:00
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static int adb_dev_map;
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2005-04-16 16:20:36 -06:00
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static struct adb_request bright_req_1, bright_req_2, bright_req_3;
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static int pmu_kind = PMU_UNKNOWN;
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2007-02-10 13:35:12 -07:00
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static int pmu_fully_inited;
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2005-04-16 16:20:36 -06:00
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int asleep;
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static int pmu_probe(void);
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static int pmu_init(void);
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static void pmu_start(void);
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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 07:55:46 -06:00
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static irqreturn_t pmu_interrupt(int irq, void *arg);
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2005-04-16 16:20:36 -06:00
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static int pmu_send_request(struct adb_request *req, int sync);
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static int pmu_autopoll(int devs);
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void pmu_poll(void);
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static int pmu_reset_bus(void);
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static void pmu_start(void);
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static void send_byte(int x);
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static void recv_byte(void);
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static void pmu_done(struct adb_request *req);
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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 07:55:46 -06:00
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static void pmu_handle_data(unsigned char *data, int len);
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2005-04-16 16:20:36 -06:00
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static void set_volume(int level);
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static void pmu_enable_backlight(int on);
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static void pmu_set_brightness(int level);
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struct adb_driver via_pmu_driver = {
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"68K PMU",
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pmu_probe,
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pmu_init,
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pmu_send_request,
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pmu_autopoll,
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pmu_poll,
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pmu_reset_bus
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};
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/*
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* This table indicates for each PMU opcode:
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* - the number of data bytes to be sent with the command, or -1
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* if a length byte should be sent,
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* - the number of response bytes which the PMU will return, or
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* -1 if it will send a length byte.
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*/
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static s8 pmu_data_len[256][2] = {
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/* 0 1 2 3 4 5 6 7 */
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/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
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/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
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/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
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/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
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/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
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/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
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/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
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/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
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/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
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/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
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/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
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/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
|
|
|
/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
|
|
|
/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
|
|
|
/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
|
|
|
/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
|
|
|
|
|
/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
|
|
|
|
|
/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
|
|
|
|
|
/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
int pmu_probe(void)
|
|
|
|
|
{
|
|
|
|
|
if (macintosh_config->adb_type == MAC_ADB_PB1) {
|
|
|
|
|
pmu_kind = PMU_68K_V1;
|
|
|
|
|
} else if (macintosh_config->adb_type == MAC_ADB_PB2) {
|
|
|
|
|
pmu_kind = PMU_68K_V2;
|
|
|
|
|
} else {
|
|
|
|
|
return -ENODEV;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pmu_state = idle;
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
pmu_init(void)
|
|
|
|
|
{
|
|
|
|
|
int timeout;
|
|
|
|
|
volatile struct adb_request req;
|
|
|
|
|
|
|
|
|
|
via2[B] |= TREQ; /* negate TREQ */
|
|
|
|
|
via2[DIRB] = (via2[DIRB] | TREQ) & ~TACK; /* TACK in, TREQ out */
|
|
|
|
|
|
|
|
|
|
pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB);
|
|
|
|
|
timeout = 100000;
|
|
|
|
|
while (!req.complete) {
|
|
|
|
|
if (--timeout < 0) {
|
|
|
|
|
printk(KERN_ERR "pmu_init: no response from PMU\n");
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
}
|
|
|
|
|
udelay(10);
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ack all pending interrupts */
|
|
|
|
|
timeout = 100000;
|
|
|
|
|
interrupt_data[0] = 1;
|
|
|
|
|
while (interrupt_data[0] || pmu_state != idle) {
|
|
|
|
|
if (--timeout < 0) {
|
|
|
|
|
printk(KERN_ERR "pmu_init: timed out acking intrs\n");
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
}
|
|
|
|
|
if (pmu_state == idle) {
|
|
|
|
|
adb_int_pending = 1;
|
2006-10-07 07:16:45 -06:00
|
|
|
pmu_interrupt(0, NULL);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
pmu_poll();
|
|
|
|
|
udelay(10);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pmu_request((struct adb_request *) &req, NULL, 2, PMU_SET_INTR_MASK,
|
|
|
|
|
PMU_INT_ADB_AUTO|PMU_INT_SNDBRT|PMU_INT_ADB);
|
|
|
|
|
timeout = 100000;
|
|
|
|
|
while (!req.complete) {
|
|
|
|
|
if (--timeout < 0) {
|
|
|
|
|
printk(KERN_ERR "pmu_init: no response from PMU\n");
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
}
|
|
|
|
|
udelay(10);
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bright_req_1.complete = 1;
|
|
|
|
|
bright_req_2.complete = 1;
|
|
|
|
|
bright_req_3.complete = 1;
|
|
|
|
|
|
|
|
|
|
if (request_irq(IRQ_MAC_ADB_SR, pmu_interrupt, 0, "pmu-shift",
|
|
|
|
|
pmu_interrupt)) {
|
|
|
|
|
printk(KERN_ERR "pmu_init: can't get irq %d\n",
|
|
|
|
|
IRQ_MAC_ADB_SR);
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
}
|
|
|
|
|
if (request_irq(IRQ_MAC_ADB_CL, pmu_interrupt, 0, "pmu-clock",
|
|
|
|
|
pmu_interrupt)) {
|
|
|
|
|
printk(KERN_ERR "pmu_init: can't get irq %d\n",
|
|
|
|
|
IRQ_MAC_ADB_CL);
|
|
|
|
|
free_irq(IRQ_MAC_ADB_SR, pmu_interrupt);
|
|
|
|
|
return -EAGAIN;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pmu_fully_inited = 1;
|
|
|
|
|
|
|
|
|
|
/* Enable backlight */
|
|
|
|
|
pmu_enable_backlight(1);
|
|
|
|
|
|
|
|
|
|
printk("adb: PMU 68K driver v0.5 for Unified ADB.\n");
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
pmu_get_model(void)
|
|
|
|
|
{
|
|
|
|
|
return pmu_kind;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Send an ADB command */
|
|
|
|
|
static int
|
|
|
|
|
pmu_send_request(struct adb_request *req, int sync)
|
|
|
|
|
{
|
|
|
|
|
int i, ret;
|
|
|
|
|
|
|
|
|
|
if (!pmu_fully_inited)
|
|
|
|
|
{
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
return -ENXIO;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = -EINVAL;
|
|
|
|
|
|
|
|
|
|
switch (req->data[0]) {
|
|
|
|
|
case PMU_PACKET:
|
|
|
|
|
for (i = 0; i < req->nbytes - 1; ++i)
|
|
|
|
|
req->data[i] = req->data[i+1];
|
|
|
|
|
--req->nbytes;
|
|
|
|
|
if (pmu_data_len[req->data[0]][1] != 0) {
|
|
|
|
|
req->reply[0] = ADB_RET_OK;
|
|
|
|
|
req->reply_len = 1;
|
|
|
|
|
} else
|
|
|
|
|
req->reply_len = 0;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
case CUDA_PACKET:
|
|
|
|
|
switch (req->data[1]) {
|
|
|
|
|
case CUDA_GET_TIME:
|
|
|
|
|
if (req->nbytes != 2)
|
|
|
|
|
break;
|
|
|
|
|
req->data[0] = PMU_READ_RTC;
|
|
|
|
|
req->nbytes = 1;
|
|
|
|
|
req->reply_len = 3;
|
|
|
|
|
req->reply[0] = CUDA_PACKET;
|
|
|
|
|
req->reply[1] = 0;
|
|
|
|
|
req->reply[2] = CUDA_GET_TIME;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
case CUDA_SET_TIME:
|
|
|
|
|
if (req->nbytes != 6)
|
|
|
|
|
break;
|
|
|
|
|
req->data[0] = PMU_SET_RTC;
|
|
|
|
|
req->nbytes = 5;
|
|
|
|
|
for (i = 1; i <= 4; ++i)
|
|
|
|
|
req->data[i] = req->data[i+1];
|
|
|
|
|
req->reply_len = 3;
|
|
|
|
|
req->reply[0] = CUDA_PACKET;
|
|
|
|
|
req->reply[1] = 0;
|
|
|
|
|
req->reply[2] = CUDA_SET_TIME;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
case CUDA_GET_PRAM:
|
|
|
|
|
if (req->nbytes != 4)
|
|
|
|
|
break;
|
|
|
|
|
req->data[0] = PMU_READ_NVRAM;
|
|
|
|
|
req->data[1] = req->data[2];
|
|
|
|
|
req->data[2] = req->data[3];
|
|
|
|
|
req->nbytes = 3;
|
|
|
|
|
req->reply_len = 3;
|
|
|
|
|
req->reply[0] = CUDA_PACKET;
|
|
|
|
|
req->reply[1] = 0;
|
|
|
|
|
req->reply[2] = CUDA_GET_PRAM;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
case CUDA_SET_PRAM:
|
|
|
|
|
if (req->nbytes != 5)
|
|
|
|
|
break;
|
|
|
|
|
req->data[0] = PMU_WRITE_NVRAM;
|
|
|
|
|
req->data[1] = req->data[2];
|
|
|
|
|
req->data[2] = req->data[3];
|
|
|
|
|
req->data[3] = req->data[4];
|
|
|
|
|
req->nbytes = 4;
|
|
|
|
|
req->reply_len = 3;
|
|
|
|
|
req->reply[0] = CUDA_PACKET;
|
|
|
|
|
req->reply[1] = 0;
|
|
|
|
|
req->reply[2] = CUDA_SET_PRAM;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case ADB_PACKET:
|
|
|
|
|
for (i = req->nbytes - 1; i > 1; --i)
|
|
|
|
|
req->data[i+2] = req->data[i];
|
|
|
|
|
req->data[3] = req->nbytes - 2;
|
|
|
|
|
req->data[2] = pmu_adb_flags;
|
|
|
|
|
/*req->data[1] = req->data[1];*/
|
|
|
|
|
req->data[0] = PMU_ADB_CMD;
|
|
|
|
|
req->nbytes += 2;
|
|
|
|
|
req->reply_expected = 1;
|
|
|
|
|
req->reply_len = 0;
|
|
|
|
|
ret = pmu_queue_request(req);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (ret)
|
|
|
|
|
{
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
return ret;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (sync) {
|
|
|
|
|
while (!req->complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Enable/disable autopolling */
|
|
|
|
|
static int
|
|
|
|
|
pmu_autopoll(int devs)
|
|
|
|
|
{
|
|
|
|
|
struct adb_request req;
|
|
|
|
|
|
|
|
|
|
if (!pmu_fully_inited) return -ENXIO;
|
|
|
|
|
|
|
|
|
|
if (devs) {
|
|
|
|
|
adb_dev_map = devs;
|
|
|
|
|
pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
|
|
|
|
|
adb_dev_map >> 8, adb_dev_map);
|
|
|
|
|
pmu_adb_flags = 2;
|
|
|
|
|
} else {
|
|
|
|
|
pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
|
|
|
|
|
pmu_adb_flags = 0;
|
|
|
|
|
}
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Reset the ADB bus */
|
|
|
|
|
static int
|
|
|
|
|
pmu_reset_bus(void)
|
|
|
|
|
{
|
|
|
|
|
struct adb_request req;
|
|
|
|
|
long timeout;
|
|
|
|
|
int save_autopoll = adb_dev_map;
|
|
|
|
|
|
|
|
|
|
if (!pmu_fully_inited) return -ENXIO;
|
|
|
|
|
|
|
|
|
|
/* anyone got a better idea?? */
|
|
|
|
|
pmu_autopoll(0);
|
|
|
|
|
|
|
|
|
|
req.nbytes = 5;
|
|
|
|
|
req.done = NULL;
|
|
|
|
|
req.data[0] = PMU_ADB_CMD;
|
|
|
|
|
req.data[1] = 0;
|
|
|
|
|
req.data[2] = 3; /* ADB_BUSRESET ??? */
|
|
|
|
|
req.data[3] = 0;
|
|
|
|
|
req.data[4] = 0;
|
|
|
|
|
req.reply_len = 0;
|
|
|
|
|
req.reply_expected = 1;
|
|
|
|
|
if (pmu_queue_request(&req) != 0)
|
|
|
|
|
{
|
|
|
|
|
printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
|
|
|
|
|
return -EIO;
|
|
|
|
|
}
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
timeout = 100000;
|
|
|
|
|
while (!req.complete) {
|
|
|
|
|
if (--timeout < 0) {
|
|
|
|
|
printk(KERN_ERR "pmu_adb_reset_bus (reset): no response from PMU\n");
|
|
|
|
|
return -EIO;
|
|
|
|
|
}
|
|
|
|
|
udelay(10);
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (save_autopoll != 0)
|
|
|
|
|
pmu_autopoll(save_autopoll);
|
|
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Construct and send a pmu request */
|
|
|
|
|
int
|
|
|
|
|
pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
|
|
|
|
|
int nbytes, ...)
|
|
|
|
|
{
|
|
|
|
|
va_list list;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
if (nbytes < 0 || nbytes > 32) {
|
|
|
|
|
printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
req->nbytes = nbytes;
|
|
|
|
|
req->done = done;
|
|
|
|
|
va_start(list, nbytes);
|
|
|
|
|
for (i = 0; i < nbytes; ++i)
|
|
|
|
|
req->data[i] = va_arg(list, int);
|
|
|
|
|
va_end(list);
|
|
|
|
|
if (pmu_data_len[req->data[0]][1] != 0) {
|
|
|
|
|
req->reply[0] = ADB_RET_OK;
|
|
|
|
|
req->reply_len = 1;
|
|
|
|
|
} else
|
|
|
|
|
req->reply_len = 0;
|
|
|
|
|
req->reply_expected = 0;
|
|
|
|
|
return pmu_queue_request(req);
|
|
|
|
|
}
|
|
|
|
|
|
2007-05-01 14:32:49 -06:00
|
|
|
int
|
2005-04-16 16:20:36 -06:00
|
|
|
pmu_queue_request(struct adb_request *req)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
int nsend;
|
|
|
|
|
|
|
|
|
|
if (req->nbytes <= 0) {
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
nsend = pmu_data_len[req->data[0]][0];
|
|
|
|
|
if (nsend >= 0 && req->nbytes != nsend + 1) {
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
return -EINVAL;
|
|
|
|
|
}
|
|
|
|
|
|
2006-01-12 02:06:34 -07:00
|
|
|
req->next = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
req->sent = 0;
|
|
|
|
|
req->complete = 0;
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
|
|
|
|
|
if (current_req != 0) {
|
|
|
|
|
last_req->next = req;
|
|
|
|
|
last_req = req;
|
|
|
|
|
} else {
|
|
|
|
|
current_req = req;
|
|
|
|
|
last_req = req;
|
|
|
|
|
if (pmu_state == idle)
|
|
|
|
|
pmu_start();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
send_byte(int x)
|
|
|
|
|
{
|
|
|
|
|
via1[ACR] |= SR_CTRL;
|
|
|
|
|
via1[SR] = x;
|
|
|
|
|
via2[B] &= ~TREQ; /* assert TREQ */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
recv_byte(void)
|
|
|
|
|
{
|
|
|
|
|
char c;
|
|
|
|
|
|
|
|
|
|
via1[ACR] = (via1[ACR] | SR_EXT) & ~SR_OUT;
|
|
|
|
|
c = via1[SR]; /* resets SR */
|
|
|
|
|
via2[B] &= ~TREQ;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
pmu_start(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
struct adb_request *req;
|
|
|
|
|
|
|
|
|
|
/* assert pmu_state == idle */
|
|
|
|
|
/* get the packet to send */
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
req = current_req;
|
|
|
|
|
if (req == 0 || pmu_state != idle
|
|
|
|
|
|| (req->reply_expected && req_awaiting_reply))
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
pmu_state = sending;
|
|
|
|
|
data_index = 1;
|
|
|
|
|
data_len = pmu_data_len[req->data[0]][0];
|
|
|
|
|
|
|
|
|
|
/* set the shift register to shift out and send a byte */
|
|
|
|
|
send_byte(req->data[0]);
|
|
|
|
|
|
|
|
|
|
out:
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
pmu_poll(void)
|
|
|
|
|
{
|
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
if (via1[IFR] & SR_INT) {
|
|
|
|
|
via1[IFR] = SR_INT;
|
2006-10-07 07:16:45 -06:00
|
|
|
pmu_interrupt(IRQ_MAC_ADB_SR, NULL);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
if (via1[IFR] & CB1_INT) {
|
|
|
|
|
via1[IFR] = CB1_INT;
|
2006-10-07 07:16:45 -06:00
|
|
|
pmu_interrupt(IRQ_MAC_ADB_CL, NULL);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
local_irq_restore(flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static irqreturn_t
|
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 07:55:46 -06:00
|
|
|
pmu_interrupt(int irq, void *dev_id)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
|
struct adb_request *req;
|
|
|
|
|
int timeout, bite = 0; /* to prevent compiler warning */
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
|
printk("pmu_interrupt: irq %d state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
|
|
|
|
|
irq, pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (irq == IRQ_MAC_ADB_CL) { /* CB1 interrupt */
|
|
|
|
|
adb_int_pending = 1;
|
|
|
|
|
} else if (irq == IRQ_MAC_ADB_SR) { /* SR interrupt */
|
|
|
|
|
if (via2[B] & TACK) {
|
|
|
|
|
printk(KERN_DEBUG "PMU: SR_INT but ack still high! (%x)\n", via2[B]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* if reading grab the byte */
|
|
|
|
|
if ((via1[ACR] & SR_OUT) == 0) bite = via1[SR];
|
|
|
|
|
|
|
|
|
|
/* reset TREQ and wait for TACK to go high */
|
|
|
|
|
via2[B] |= TREQ;
|
|
|
|
|
timeout = 3200;
|
|
|
|
|
while (!(via2[B] & TACK)) {
|
|
|
|
|
if (--timeout < 0) {
|
|
|
|
|
printk(KERN_ERR "PMU not responding (!ack)\n");
|
|
|
|
|
goto finish;
|
|
|
|
|
}
|
|
|
|
|
udelay(10);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
switch (pmu_state) {
|
|
|
|
|
case sending:
|
|
|
|
|
req = current_req;
|
|
|
|
|
if (data_len < 0) {
|
|
|
|
|
data_len = req->nbytes - 1;
|
|
|
|
|
send_byte(data_len);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
if (data_index <= data_len) {
|
|
|
|
|
send_byte(req->data[data_index++]);
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
req->sent = 1;
|
|
|
|
|
data_len = pmu_data_len[req->data[0]][1];
|
|
|
|
|
if (data_len == 0) {
|
|
|
|
|
pmu_state = idle;
|
|
|
|
|
current_req = req->next;
|
|
|
|
|
if (req->reply_expected)
|
|
|
|
|
req_awaiting_reply = req;
|
|
|
|
|
else
|
|
|
|
|
pmu_done(req);
|
|
|
|
|
} else {
|
|
|
|
|
pmu_state = reading;
|
|
|
|
|
data_index = 0;
|
|
|
|
|
reply_ptr = req->reply + req->reply_len;
|
|
|
|
|
recv_byte();
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case intack:
|
|
|
|
|
data_index = 0;
|
|
|
|
|
data_len = -1;
|
|
|
|
|
pmu_state = reading_intr;
|
|
|
|
|
reply_ptr = interrupt_data;
|
|
|
|
|
recv_byte();
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case reading:
|
|
|
|
|
case reading_intr:
|
|
|
|
|
if (data_len == -1) {
|
|
|
|
|
data_len = bite;
|
|
|
|
|
if (bite > 32)
|
|
|
|
|
printk(KERN_ERR "PMU: bad reply len %d\n",
|
|
|
|
|
bite);
|
|
|
|
|
} else {
|
|
|
|
|
reply_ptr[data_index++] = bite;
|
|
|
|
|
}
|
|
|
|
|
if (data_index < data_len) {
|
|
|
|
|
recv_byte();
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (pmu_state == reading_intr) {
|
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 07:55:46 -06:00
|
|
|
pmu_handle_data(interrupt_data, data_index);
|
2005-04-16 16:20:36 -06:00
|
|
|
} else {
|
|
|
|
|
req = current_req;
|
|
|
|
|
current_req = req->next;
|
|
|
|
|
req->reply_len += data_index;
|
|
|
|
|
pmu_done(req);
|
|
|
|
|
}
|
|
|
|
|
pmu_state = idle;
|
|
|
|
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
printk(KERN_ERR "pmu_interrupt: unknown state %d?\n",
|
|
|
|
|
pmu_state);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
finish:
|
|
|
|
|
if (pmu_state == idle) {
|
|
|
|
|
if (adb_int_pending) {
|
|
|
|
|
pmu_state = intack;
|
|
|
|
|
send_byte(PMU_INT_ACK);
|
|
|
|
|
adb_int_pending = 0;
|
|
|
|
|
} else if (current_req) {
|
|
|
|
|
pmu_start();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
|
printk("pmu_interrupt: exit state %d acr %02X, b %02X data_index %d/%d adb_int_pending %d\n",
|
|
|
|
|
pmu_state, (uint) via1[ACR], (uint) via2[B], data_index, data_len, adb_int_pending);
|
|
|
|
|
#endif
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
pmu_done(struct adb_request *req)
|
|
|
|
|
{
|
|
|
|
|
req->complete = 1;
|
|
|
|
|
if (req->done)
|
|
|
|
|
(*req->done)(req);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Interrupt data could be the result data from an ADB cmd */
|
|
|
|
|
static void
|
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 07:55:46 -06:00
|
|
|
pmu_handle_data(unsigned char *data, int len)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
|
static int show_pmu_ints = 1;
|
|
|
|
|
|
|
|
|
|
asleep = 0;
|
|
|
|
|
if (len < 1) {
|
|
|
|
|
adb_int_pending = 0;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
if (data[0] & PMU_INT_ADB) {
|
|
|
|
|
if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
|
|
|
|
|
struct adb_request *req = req_awaiting_reply;
|
|
|
|
|
if (req == 0) {
|
|
|
|
|
printk(KERN_ERR "PMU: extra ADB reply\n");
|
|
|
|
|
return;
|
|
|
|
|
}
|
2006-01-12 02:06:34 -07:00
|
|
|
req_awaiting_reply = NULL;
|
2005-04-16 16:20:36 -06:00
|
|
|
if (len <= 2)
|
|
|
|
|
req->reply_len = 0;
|
|
|
|
|
else {
|
|
|
|
|
memcpy(req->reply, data + 1, len - 1);
|
|
|
|
|
req->reply_len = len - 1;
|
|
|
|
|
}
|
|
|
|
|
pmu_done(req);
|
|
|
|
|
} else {
|
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 07:55:46 -06:00
|
|
|
adb_input(data+1, len-1, 1);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
} else {
|
|
|
|
|
if (data[0] == 0x08 && len == 3) {
|
|
|
|
|
/* sound/brightness buttons pressed */
|
|
|
|
|
pmu_set_brightness(data[1] >> 3);
|
|
|
|
|
set_volume(data[2]);
|
|
|
|
|
} else if (show_pmu_ints
|
|
|
|
|
&& !(data[0] == PMU_INT_TICK && len == 1)) {
|
|
|
|
|
int i;
|
|
|
|
|
printk(KERN_DEBUG "pmu intr");
|
|
|
|
|
for (i = 0; i < len; ++i)
|
|
|
|
|
printk(" %.2x", data[i]);
|
|
|
|
|
printk("\n");
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2008-06-23 11:46:57 -06:00
|
|
|
static int backlight_level = -1;
|
|
|
|
|
static int backlight_enabled = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
|
#define LEVEL_TO_BRIGHT(lev) ((lev) < 1? 0x7f: 0x4a - ((lev) << 1))
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
pmu_enable_backlight(int on)
|
|
|
|
|
{
|
|
|
|
|
struct adb_request req;
|
|
|
|
|
|
|
|
|
|
if (on) {
|
|
|
|
|
/* first call: get current backlight value */
|
|
|
|
|
if (backlight_level < 0) {
|
|
|
|
|
switch(pmu_kind) {
|
|
|
|
|
case PMU_68K_V1:
|
|
|
|
|
case PMU_68K_V2:
|
|
|
|
|
pmu_request(&req, NULL, 3, PMU_READ_NVRAM, 0x14, 0xe);
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
printk(KERN_DEBUG "pmu: nvram returned bright: %d\n", (int)req.reply[1]);
|
|
|
|
|
backlight_level = req.reply[1];
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
backlight_enabled = 0;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
|
|
|
|
|
LEVEL_TO_BRIGHT(backlight_level));
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
|
|
|
|
|
PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
backlight_enabled = on;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
pmu_set_brightness(int level)
|
|
|
|
|
{
|
|
|
|
|
int bright;
|
|
|
|
|
|
|
|
|
|
backlight_level = level;
|
|
|
|
|
bright = LEVEL_TO_BRIGHT(level);
|
|
|
|
|
if (!backlight_enabled)
|
|
|
|
|
return;
|
|
|
|
|
if (bright_req_1.complete)
|
|
|
|
|
pmu_request(&bright_req_1, NULL, 2, PMU_BACKLIGHT_BRIGHT,
|
|
|
|
|
bright);
|
|
|
|
|
if (bright_req_2.complete)
|
|
|
|
|
pmu_request(&bright_req_2, NULL, 2, PMU_POWER_CTRL,
|
|
|
|
|
PMU_POW_BACKLIGHT | (bright < 0x7f ? PMU_POW_ON : PMU_POW_OFF));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
pmu_enable_irled(int on)
|
|
|
|
|
{
|
|
|
|
|
struct adb_request req;
|
|
|
|
|
|
|
|
|
|
pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
|
|
|
|
|
(on ? PMU_POW_ON : PMU_POW_OFF));
|
|
|
|
|
while (!req.complete)
|
|
|
|
|
pmu_poll();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
set_volume(int level)
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
pmu_present(void)
|
|
|
|
|
{
|
|
|
|
|
return (pmu_kind != PMU_UNKNOWN);
|
|
|
|
|
}
|