mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-23 20:24:12 +08:00
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-apm
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-apm: [APM] SH: Convert to use shared APM emulation. [APM] MIPS: Convert to use shared APM emulation. [APM] ARM: Convert to use shared APM emulation. [APM] Add shared version of APM emulation
This commit is contained in:
commit
2fd592e45b
@ -9,6 +9,7 @@ config ARM
|
||||
bool
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default y
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select RTC_LIB
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select SYS_SUPPORTS_APM_EMULATION
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help
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The ARM series is a line of low-power-consumption RISC chip designs
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licensed by ARM Ltd and targeted at embedded applications and
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||||
@ -17,6 +18,9 @@ config ARM
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||||
Europe. There is an ARM Linux project with a web page at
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<http://www.arm.linux.org.uk/>.
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config SYS_SUPPORTS_APM_EMULATION
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bool
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config GENERIC_TIME
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bool
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default n
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@ -856,31 +860,6 @@ menu "Power management options"
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source "kernel/power/Kconfig"
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config APM
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tristate "Advanced Power Management Emulation"
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---help---
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APM is a BIOS specification for saving power using several different
|
||||
techniques. This is mostly useful for battery powered laptops with
|
||||
APM compliant BIOSes. If you say Y here, the system time will be
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reset after a RESUME operation, the /proc/apm device will provide
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battery status information, and user-space programs will receive
|
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notification of APM "events" (e.g. battery status change).
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In order to use APM, you will need supporting software. For location
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and more information, read <file:Documentation/pm.txt> and the
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Battery Powered Linux mini-HOWTO, available from
|
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<http://www.tldp.org/docs.html#howto>.
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This driver does not spin down disk drives (see the hdparm(8)
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manpage ("man 8 hdparm") for that), and it doesn't turn off
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VESA-compliant "green" monitors.
|
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|
||||
Generally, if you don't have a battery in your machine, there isn't
|
||||
much point in using this driver and you should say N. If you get
|
||||
random kernel OOPSes or reboots that don't seem to be related to
|
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anything, try disabling/enabling this option (or disabling/enabling
|
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APM in your BIOS).
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endmenu
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source "net/Kconfig"
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|
@ -27,7 +27,7 @@
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <asm/apm.h>
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#include <asm/apm-emulation.h>
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#include <asm/arch/pm.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/sharpsl.h>
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|
@ -10,7 +10,6 @@ obj-y := compat.o entry-armv.o entry-common.o irq.o \
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process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \
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time.o traps.o
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obj-$(CONFIG_APM) += apm.o
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obj-$(CONFIG_ISA_DMA_API) += dma.o
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obj-$(CONFIG_ARCH_ACORN) += ecard.o
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obj-$(CONFIG_FIQ) += fiq.o
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|
@ -16,7 +16,7 @@
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/apm.h>
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#include <asm/apm-emulation.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/hardware.h>
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|
@ -23,7 +23,7 @@
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#include <asm/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/apm.h>
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#include <asm/apm-emulation.h>
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#include <asm/arch/pm.h>
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#include <asm/arch/pxa-regs.h>
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#include <asm/arch/sharpsl.h>
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|
@ -16,7 +16,7 @@
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/apm.h>
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#include <asm/apm-emulation.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <asm/hardware.h>
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|
@ -934,6 +934,9 @@ config CPU_LITTLE_ENDIAN
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endchoice
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config SYS_SUPPORTS_APM_EMULATION
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bool
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config SYS_SUPPORTS_BIG_ENDIAN
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bool
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@ -1001,6 +1004,7 @@ config SOC_AU1X00
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bool
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select SYS_HAS_CPU_MIPS32_R1
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_APM_EMULATION
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config PNX8550
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bool
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@ -2071,35 +2075,11 @@ config BINFMT_ELF32
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bool
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default y if MIPS32_O32 || MIPS32_N32
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config PM
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bool "Power Management support (EXPERIMENTAL)"
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depends on EXPERIMENTAL && SOC_AU1X00
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endmenu
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config APM
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tristate "Advanced Power Management Emulation"
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depends on PM
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---help---
|
||||
APM is a BIOS specification for saving power using several different
|
||||
techniques. This is mostly useful for battery powered systems with
|
||||
APM compliant BIOSes. If you say Y here, the system time will be
|
||||
reset after a RESUME operation, the /proc/apm device will provide
|
||||
battery status information, and user-space programs will receive
|
||||
notification of APM "events" (e.g. battery status change).
|
||||
menu "Power management options"
|
||||
|
||||
In order to use APM, you will need supporting software. For location
|
||||
and more information, read <file:Documentation/pm.txt> and the
|
||||
Battery Powered Linux mini-HOWTO, available from
|
||||
<http://www.tldp.org/docs.html#howto>.
|
||||
|
||||
This driver does not spin down disk drives (see the hdparm(8)
|
||||
manpage ("man 8 hdparm") for that), and it doesn't turn off
|
||||
VESA-compliant "green" monitors.
|
||||
|
||||
Generally, if you don't have a battery in your machine, there isn't
|
||||
much point in using this driver and you should say N. If you get
|
||||
random kernel OOPSes or reboots that don't seem to be related to
|
||||
anything, try disabling/enabling this option (or disabling/enabling
|
||||
APM in your BIOS).
|
||||
source "kernel/power/Kconfig"
|
||||
|
||||
endmenu
|
||||
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||||
|
@ -14,8 +14,6 @@ binfmt_irix-objs := irixelf.o irixinv.o irixioctl.o irixsig.o \
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-$(CONFIG_MODULES) += mips_ksyms.o module.o
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||||
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obj-$(CONFIG_APM) += apm.o
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||||
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||||
obj-$(CONFIG_CPU_R3000) += r2300_fpu.o r2300_switch.o
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obj-$(CONFIG_CPU_TX39XX) += r2300_fpu.o r2300_switch.o
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||||
obj-$(CONFIG_CPU_TX49XX) += r4k_fpu.o r4k_switch.o
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||||
|
@ -1,604 +0,0 @@
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/*
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||||
* bios-less APM driver for MIPS Linux
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||||
* Jamey Hicks <jamey@crl.dec.com>
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* adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com)
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||||
*
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||||
* APM 1.2 Reference:
|
||||
* Intel Corporation, Microsoft Corporation. Advanced Power Management
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* (APM) BIOS Interface Specification, Revision 1.2, February 1996.
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||||
*
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* [This document is available from Microsoft at:
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||||
* http://www.microsoft.com/hwdev/busbios/amp_12.htm]
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||||
*/
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||||
#include <linux/module.h>
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||||
#include <linux/poll.h>
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||||
#include <linux/timer.h>
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||||
#include <linux/slab.h>
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#include <linux/proc_fs.h>
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||||
#include <linux/miscdevice.h>
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#include <linux/apm_bios.h>
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||||
#include <linux/capability.h>
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#include <linux/sched.h>
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#include <linux/pm.h>
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#include <linux/device.h>
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||||
#include <linux/kernel.h>
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||||
#include <linux/list.h>
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||||
#include <linux/init.h>
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||||
#include <linux/completion.h>
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||||
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||||
#include <asm/apm.h> /* apm_power_info */
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#include <asm/system.h>
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||||
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/*
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||||
* The apm_bios device is one of the misc char devices.
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||||
* This is its minor number.
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||||
*/
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||||
#define APM_MINOR_DEV 134
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||||
/*
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||||
* See Documentation/Config.help for the configuration options.
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*
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||||
* Various options can be changed at boot time as follows:
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||||
* (We allow underscores for compatibility with the modules code)
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* apm=on/off enable/disable APM
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||||
*/
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||||
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||||
/*
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* Maximum number of events stored
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||||
*/
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#define APM_MAX_EVENTS 16
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||||
struct apm_queue {
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||||
unsigned int event_head;
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unsigned int event_tail;
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||||
apm_event_t events[APM_MAX_EVENTS];
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||||
};
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||||
|
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/*
|
||||
* The per-file APM data
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||||
*/
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||||
struct apm_user {
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struct list_head list;
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||||
unsigned int suser: 1;
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unsigned int writer: 1;
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unsigned int reader: 1;
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|
||||
int suspend_result;
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unsigned int suspend_state;
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#define SUSPEND_NONE 0 /* no suspend pending */
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#define SUSPEND_PENDING 1 /* suspend pending read */
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#define SUSPEND_READ 2 /* suspend read, pending ack */
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#define SUSPEND_ACKED 3 /* suspend acked */
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#define SUSPEND_DONE 4 /* suspend completed */
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struct apm_queue queue;
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};
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/*
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* Local variables
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||||
*/
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static int suspends_pending;
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static int apm_disabled;
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static int mips_apm_active;
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static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
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static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
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/*
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* This is a list of everyone who has opened /dev/apm_bios
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*/
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static DECLARE_RWSEM(user_list_lock);
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static LIST_HEAD(apm_user_list);
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/*
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* kapmd info. kapmd provides us a process context to handle
|
||||
* "APM" events within - specifically necessary if we're going
|
||||
* to be suspending the system.
|
||||
*/
|
||||
static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait);
|
||||
static DECLARE_COMPLETION(kapmd_exit);
|
||||
static DEFINE_SPINLOCK(kapmd_queue_lock);
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||||
static struct apm_queue kapmd_queue;
|
||||
|
||||
|
||||
static const char driver_version[] = "1.13"; /* no spaces */
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* Compatibility cruft until the IPAQ people move over to the new
|
||||
* interface.
|
||||
*/
|
||||
static void __apm_get_power_status(struct apm_power_info *info)
|
||||
{
|
||||
}
|
||||
|
||||
/*
|
||||
* This allows machines to provide their own "apm get power status" function.
|
||||
*/
|
||||
void (*apm_get_power_status)(struct apm_power_info *) = __apm_get_power_status;
|
||||
EXPORT_SYMBOL(apm_get_power_status);
|
||||
|
||||
|
||||
/*
|
||||
* APM event queue management.
|
||||
*/
|
||||
static inline int queue_empty(struct apm_queue *q)
|
||||
{
|
||||
return q->event_head == q->event_tail;
|
||||
}
|
||||
|
||||
static inline apm_event_t queue_get_event(struct apm_queue *q)
|
||||
{
|
||||
q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
|
||||
return q->events[q->event_tail];
|
||||
}
|
||||
|
||||
static void queue_add_event(struct apm_queue *q, apm_event_t event)
|
||||
{
|
||||
q->event_head = (q->event_head + 1) % APM_MAX_EVENTS;
|
||||
if (q->event_head == q->event_tail) {
|
||||
static int notified;
|
||||
|
||||
if (notified++ == 0)
|
||||
printk(KERN_ERR "apm: an event queue overflowed\n");
|
||||
q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
|
||||
}
|
||||
q->events[q->event_head] = event;
|
||||
}
|
||||
|
||||
static void queue_event_one_user(struct apm_user *as, apm_event_t event)
|
||||
{
|
||||
if (as->suser && as->writer) {
|
||||
switch (event) {
|
||||
case APM_SYS_SUSPEND:
|
||||
case APM_USER_SUSPEND:
|
||||
/*
|
||||
* If this user already has a suspend pending,
|
||||
* don't queue another one.
|
||||
*/
|
||||
if (as->suspend_state != SUSPEND_NONE)
|
||||
return;
|
||||
|
||||
as->suspend_state = SUSPEND_PENDING;
|
||||
suspends_pending++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
queue_add_event(&as->queue, event);
|
||||
}
|
||||
|
||||
static void queue_event(apm_event_t event, struct apm_user *sender)
|
||||
{
|
||||
struct apm_user *as;
|
||||
|
||||
down_read(&user_list_lock);
|
||||
list_for_each_entry(as, &apm_user_list, list) {
|
||||
if (as != sender && as->reader)
|
||||
queue_event_one_user(as, event);
|
||||
}
|
||||
up_read(&user_list_lock);
|
||||
wake_up_interruptible(&apm_waitqueue);
|
||||
}
|
||||
|
||||
static void apm_suspend(void)
|
||||
{
|
||||
struct apm_user *as;
|
||||
int err = pm_suspend(PM_SUSPEND_MEM);
|
||||
|
||||
/*
|
||||
* Anyone on the APM queues will think we're still suspended.
|
||||
* Send a message so everyone knows we're now awake again.
|
||||
*/
|
||||
queue_event(APM_NORMAL_RESUME, NULL);
|
||||
|
||||
/*
|
||||
* Finally, wake up anyone who is sleeping on the suspend.
|
||||
*/
|
||||
down_read(&user_list_lock);
|
||||
list_for_each_entry(as, &apm_user_list, list) {
|
||||
as->suspend_result = err;
|
||||
as->suspend_state = SUSPEND_DONE;
|
||||
}
|
||||
up_read(&user_list_lock);
|
||||
|
||||
wake_up(&apm_suspend_waitqueue);
|
||||
}
|
||||
|
||||
static ssize_t apm_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
|
||||
{
|
||||
struct apm_user *as = fp->private_data;
|
||||
apm_event_t event;
|
||||
int i = count, ret = 0;
|
||||
|
||||
if (count < sizeof(apm_event_t))
|
||||
return -EINVAL;
|
||||
|
||||
if (queue_empty(&as->queue) && fp->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
|
||||
wait_event_interruptible(apm_waitqueue, !queue_empty(&as->queue));
|
||||
|
||||
while ((i >= sizeof(event)) && !queue_empty(&as->queue)) {
|
||||
event = queue_get_event(&as->queue);
|
||||
|
||||
ret = -EFAULT;
|
||||
if (copy_to_user(buf, &event, sizeof(event)))
|
||||
break;
|
||||
|
||||
if (event == APM_SYS_SUSPEND || event == APM_USER_SUSPEND)
|
||||
as->suspend_state = SUSPEND_READ;
|
||||
|
||||
buf += sizeof(event);
|
||||
i -= sizeof(event);
|
||||
}
|
||||
|
||||
if (i < count)
|
||||
ret = count - i;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static unsigned int apm_poll(struct file *fp, poll_table * wait)
|
||||
{
|
||||
struct apm_user *as = fp->private_data;
|
||||
|
||||
poll_wait(fp, &apm_waitqueue, wait);
|
||||
return queue_empty(&as->queue) ? 0 : POLLIN | POLLRDNORM;
|
||||
}
|
||||
|
||||
/*
|
||||
* apm_ioctl - handle APM ioctl
|
||||
*
|
||||
* APM_IOC_SUSPEND
|
||||
* This IOCTL is overloaded, and performs two functions. It is used to:
|
||||
* - initiate a suspend
|
||||
* - acknowledge a suspend read from /dev/apm_bios.
|
||||
* Only when everyone who has opened /dev/apm_bios with write permission
|
||||
* has acknowledge does the actual suspend happen.
|
||||
*/
|
||||
static int
|
||||
apm_ioctl(struct inode * inode, struct file *filp, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct apm_user *as = filp->private_data;
|
||||
unsigned long flags;
|
||||
int err = -EINVAL;
|
||||
|
||||
if (!as->suser || !as->writer)
|
||||
return -EPERM;
|
||||
|
||||
switch (cmd) {
|
||||
case APM_IOC_SUSPEND:
|
||||
as->suspend_result = -EINTR;
|
||||
|
||||
if (as->suspend_state == SUSPEND_READ) {
|
||||
/*
|
||||
* If we read a suspend command from /dev/apm_bios,
|
||||
* then the corresponding APM_IOC_SUSPEND ioctl is
|
||||
* interpreted as an acknowledge.
|
||||
*/
|
||||
as->suspend_state = SUSPEND_ACKED;
|
||||
suspends_pending--;
|
||||
} else {
|
||||
/*
|
||||
* Otherwise it is a request to suspend the system.
|
||||
* Queue an event for all readers, and expect an
|
||||
* acknowledge from all writers who haven't already
|
||||
* acknowledged.
|
||||
*/
|
||||
queue_event(APM_USER_SUSPEND, as);
|
||||
}
|
||||
|
||||
/*
|
||||
* If there are no further acknowledges required, suspend
|
||||
* the system.
|
||||
*/
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
|
||||
/*
|
||||
* Wait for the suspend/resume to complete. If there are
|
||||
* pending acknowledges, we wait here for them.
|
||||
*
|
||||
* Note that we need to ensure that the PM subsystem does
|
||||
* not kick us out of the wait when it suspends the threads.
|
||||
*/
|
||||
flags = current->flags;
|
||||
current->flags |= PF_NOFREEZE;
|
||||
|
||||
/*
|
||||
* Note: do not allow a thread which is acking the suspend
|
||||
* to escape until the resume is complete.
|
||||
*/
|
||||
if (as->suspend_state == SUSPEND_ACKED)
|
||||
wait_event(apm_suspend_waitqueue,
|
||||
as->suspend_state == SUSPEND_DONE);
|
||||
else
|
||||
wait_event_interruptible(apm_suspend_waitqueue,
|
||||
as->suspend_state == SUSPEND_DONE);
|
||||
|
||||
current->flags = flags;
|
||||
err = as->suspend_result;
|
||||
as->suspend_state = SUSPEND_NONE;
|
||||
break;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int apm_release(struct inode * inode, struct file * filp)
|
||||
{
|
||||
struct apm_user *as = filp->private_data;
|
||||
filp->private_data = NULL;
|
||||
|
||||
down_write(&user_list_lock);
|
||||
list_del(&as->list);
|
||||
up_write(&user_list_lock);
|
||||
|
||||
/*
|
||||
* We are now unhooked from the chain. As far as new
|
||||
* events are concerned, we no longer exist. However, we
|
||||
* need to balance suspends_pending, which means the
|
||||
* possibility of sleeping.
|
||||
*/
|
||||
if (as->suspend_state != SUSPEND_NONE) {
|
||||
suspends_pending -= 1;
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
}
|
||||
|
||||
kfree(as);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apm_open(struct inode * inode, struct file * filp)
|
||||
{
|
||||
struct apm_user *as;
|
||||
|
||||
as = kzalloc(sizeof(*as), GFP_KERNEL);
|
||||
if (as) {
|
||||
/*
|
||||
* XXX - this is a tiny bit broken, when we consider BSD
|
||||
* process accounting. If the device is opened by root, we
|
||||
* instantly flag that we used superuser privs. Who knows,
|
||||
* we might close the device immediately without doing a
|
||||
* privileged operation -- cevans
|
||||
*/
|
||||
as->suser = capable(CAP_SYS_ADMIN);
|
||||
as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
|
||||
as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
|
||||
|
||||
down_write(&user_list_lock);
|
||||
list_add(&as->list, &apm_user_list);
|
||||
up_write(&user_list_lock);
|
||||
|
||||
filp->private_data = as;
|
||||
}
|
||||
|
||||
return as ? 0 : -ENOMEM;
|
||||
}
|
||||
|
||||
static struct file_operations apm_bios_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = apm_read,
|
||||
.poll = apm_poll,
|
||||
.ioctl = apm_ioctl,
|
||||
.open = apm_open,
|
||||
.release = apm_release,
|
||||
};
|
||||
|
||||
static struct miscdevice apm_device = {
|
||||
.minor = APM_MINOR_DEV,
|
||||
.name = "apm_bios",
|
||||
.fops = &apm_bios_fops
|
||||
};
|
||||
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
/*
|
||||
* Arguments, with symbols from linux/apm_bios.h.
|
||||
*
|
||||
* 0) Linux driver version (this will change if format changes)
|
||||
* 1) APM BIOS Version. Usually 1.0, 1.1 or 1.2.
|
||||
* 2) APM flags from APM Installation Check (0x00):
|
||||
* bit 0: APM_16_BIT_SUPPORT
|
||||
* bit 1: APM_32_BIT_SUPPORT
|
||||
* bit 2: APM_IDLE_SLOWS_CLOCK
|
||||
* bit 3: APM_BIOS_DISABLED
|
||||
* bit 4: APM_BIOS_DISENGAGED
|
||||
* 3) AC line status
|
||||
* 0x00: Off-line
|
||||
* 0x01: On-line
|
||||
* 0x02: On backup power (BIOS >= 1.1 only)
|
||||
* 0xff: Unknown
|
||||
* 4) Battery status
|
||||
* 0x00: High
|
||||
* 0x01: Low
|
||||
* 0x02: Critical
|
||||
* 0x03: Charging
|
||||
* 0x04: Selected battery not present (BIOS >= 1.2 only)
|
||||
* 0xff: Unknown
|
||||
* 5) Battery flag
|
||||
* bit 0: High
|
||||
* bit 1: Low
|
||||
* bit 2: Critical
|
||||
* bit 3: Charging
|
||||
* bit 7: No system battery
|
||||
* 0xff: Unknown
|
||||
* 6) Remaining battery life (percentage of charge):
|
||||
* 0-100: valid
|
||||
* -1: Unknown
|
||||
* 7) Remaining battery life (time units):
|
||||
* Number of remaining minutes or seconds
|
||||
* -1: Unknown
|
||||
* 8) min = minutes; sec = seconds
|
||||
*/
|
||||
static int apm_get_info(char *buf, char **start, off_t fpos, int length)
|
||||
{
|
||||
struct apm_power_info info;
|
||||
char *units;
|
||||
int ret;
|
||||
|
||||
info.ac_line_status = 0xff;
|
||||
info.battery_status = 0xff;
|
||||
info.battery_flag = 0xff;
|
||||
info.battery_life = -1;
|
||||
info.time = -1;
|
||||
info.units = -1;
|
||||
|
||||
if (apm_get_power_status)
|
||||
apm_get_power_status(&info);
|
||||
|
||||
switch (info.units) {
|
||||
default: units = "?"; break;
|
||||
case 0: units = "min"; break;
|
||||
case 1: units = "sec"; break;
|
||||
}
|
||||
|
||||
ret = sprintf(buf, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
|
||||
driver_version, APM_32_BIT_SUPPORT,
|
||||
info.ac_line_status, info.battery_status,
|
||||
info.battery_flag, info.battery_life,
|
||||
info.time, units);
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int kapmd(void *arg)
|
||||
{
|
||||
daemonize("kapmd");
|
||||
current->flags |= PF_NOFREEZE;
|
||||
|
||||
do {
|
||||
apm_event_t event;
|
||||
|
||||
wait_event_interruptible(kapmd_wait,
|
||||
!queue_empty(&kapmd_queue) || !mips_apm_active);
|
||||
|
||||
if (!mips_apm_active)
|
||||
break;
|
||||
|
||||
spin_lock_irq(&kapmd_queue_lock);
|
||||
event = 0;
|
||||
if (!queue_empty(&kapmd_queue))
|
||||
event = queue_get_event(&kapmd_queue);
|
||||
spin_unlock_irq(&kapmd_queue_lock);
|
||||
|
||||
switch (event) {
|
||||
case 0:
|
||||
break;
|
||||
|
||||
case APM_LOW_BATTERY:
|
||||
case APM_POWER_STATUS_CHANGE:
|
||||
queue_event(event, NULL);
|
||||
break;
|
||||
|
||||
case APM_USER_SUSPEND:
|
||||
case APM_SYS_SUSPEND:
|
||||
queue_event(event, NULL);
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
break;
|
||||
|
||||
case APM_CRITICAL_SUSPEND:
|
||||
apm_suspend();
|
||||
break;
|
||||
}
|
||||
} while (1);
|
||||
|
||||
complete_and_exit(&kapmd_exit, 0);
|
||||
}
|
||||
|
||||
static int __init apm_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
if (apm_disabled) {
|
||||
printk(KERN_NOTICE "apm: disabled on user request.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
mips_apm_active = 1;
|
||||
|
||||
ret = kernel_thread(kapmd, NULL, CLONE_KERNEL);
|
||||
if (ret < 0) {
|
||||
mips_apm_active = 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
create_proc_info_entry("apm", 0, NULL, apm_get_info);
|
||||
#endif
|
||||
|
||||
ret = misc_register(&apm_device);
|
||||
if (ret != 0) {
|
||||
remove_proc_entry("apm", NULL);
|
||||
|
||||
mips_apm_active = 0;
|
||||
wake_up(&kapmd_wait);
|
||||
wait_for_completion(&kapmd_exit);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit apm_exit(void)
|
||||
{
|
||||
misc_deregister(&apm_device);
|
||||
remove_proc_entry("apm", NULL);
|
||||
|
||||
mips_apm_active = 0;
|
||||
wake_up(&kapmd_wait);
|
||||
wait_for_completion(&kapmd_exit);
|
||||
}
|
||||
|
||||
module_init(apm_init);
|
||||
module_exit(apm_exit);
|
||||
|
||||
MODULE_AUTHOR("Stephen Rothwell");
|
||||
MODULE_DESCRIPTION("Advanced Power Management");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
#ifndef MODULE
|
||||
static int __init apm_setup(char *str)
|
||||
{
|
||||
while ((str != NULL) && (*str != '\0')) {
|
||||
if (strncmp(str, "off", 3) == 0)
|
||||
apm_disabled = 1;
|
||||
if (strncmp(str, "on", 2) == 0)
|
||||
apm_disabled = 0;
|
||||
str = strchr(str, ',');
|
||||
if (str != NULL)
|
||||
str += strspn(str, ", \t");
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
__setup("apm=", apm_setup);
|
||||
#endif
|
||||
|
||||
/**
|
||||
* apm_queue_event - queue an APM event for kapmd
|
||||
* @event: APM event
|
||||
*
|
||||
* Queue an APM event for kapmd to process and ultimately take the
|
||||
* appropriate action. Only a subset of events are handled:
|
||||
* %APM_LOW_BATTERY
|
||||
* %APM_POWER_STATUS_CHANGE
|
||||
* %APM_USER_SUSPEND
|
||||
* %APM_SYS_SUSPEND
|
||||
* %APM_CRITICAL_SUSPEND
|
||||
*/
|
||||
void apm_queue_event(apm_event_t event)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&kapmd_queue_lock, flags);
|
||||
queue_add_event(&kapmd_queue, event);
|
||||
spin_unlock_irqrestore(&kapmd_queue_lock, flags);
|
||||
|
||||
wake_up_interruptible(&kapmd_wait);
|
||||
}
|
||||
EXPORT_SYMBOL(apm_queue_event);
|
@ -48,6 +48,9 @@ config GENERIC_IOMAP
|
||||
config GENERIC_TIME
|
||||
def_bool n
|
||||
|
||||
config SYS_SUPPORTS_APM_EMULATION
|
||||
bool
|
||||
|
||||
config ARCH_MAY_HAVE_PC_FDC
|
||||
bool
|
||||
|
||||
@ -126,6 +129,7 @@ config SH_7751_SYSTEMH
|
||||
|
||||
config SH_HP6XX
|
||||
bool "HP6XX"
|
||||
select SYS_SUPPORTS_APM_EMULATION
|
||||
help
|
||||
Select HP6XX if configuring for a HP jornada HP6xx.
|
||||
More information (hardware only) at
|
||||
@ -694,9 +698,6 @@ depends on EXPERIMENTAL
|
||||
|
||||
source kernel/power/Kconfig
|
||||
|
||||
config APM
|
||||
bool "Advanced Power Management Emulation"
|
||||
depends on PM
|
||||
endmenu
|
||||
|
||||
source "net/Kconfig"
|
||||
|
@ -7,12 +7,11 @@
|
||||
* modify it under the terms of the GNU General Public License.
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <linux/apm_bios.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/apm.h>
|
||||
#include <linux/apm-emulation.h>
|
||||
#include <linux/io.h>
|
||||
#include <asm/adc.h>
|
||||
#include <asm/hp6xx.h>
|
||||
|
||||
@ -27,60 +26,41 @@
|
||||
|
||||
#define MODNAME "hp6x0_apm"
|
||||
|
||||
static int hp6x0_apm_get_info(char *buf, char **start, off_t fpos, int length)
|
||||
static void hp6x0_apm_get_power_status(struct apm_power_info *info)
|
||||
{
|
||||
int battery, backup, charging, percentage;
|
||||
u8 pgdr;
|
||||
char *p;
|
||||
int battery_status;
|
||||
int battery_flag;
|
||||
int ac_line_status;
|
||||
int time_units = APM_BATTERY_LIFE_UNKNOWN;
|
||||
|
||||
int battery = adc_single(ADC_CHANNEL_BATTERY);
|
||||
int backup = adc_single(ADC_CHANNEL_BACKUP);
|
||||
int charging = adc_single(ADC_CHANNEL_CHARGE);
|
||||
int percentage;
|
||||
battery = adc_single(ADC_CHANNEL_BATTERY);
|
||||
backup = adc_single(ADC_CHANNEL_BACKUP);
|
||||
charging = adc_single(ADC_CHANNEL_CHARGE);
|
||||
|
||||
percentage = 100 * (battery - HP680_BATTERY_MIN) /
|
||||
(HP680_BATTERY_MAX - HP680_BATTERY_MIN);
|
||||
|
||||
ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
|
||||
info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
|
||||
APM_AC_ONLINE : APM_AC_OFFLINE;
|
||||
|
||||
p = buf;
|
||||
|
||||
pgdr = ctrl_inb(SH7709_PGDR);
|
||||
if (pgdr & PGDR_MAIN_BATTERY_OUT) {
|
||||
battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
|
||||
battery_flag = 0x80;
|
||||
percentage = -1;
|
||||
} else if (charging < 8 ) {
|
||||
battery_status = APM_BATTERY_STATUS_CHARGING;
|
||||
battery_flag = 0x08;
|
||||
ac_line_status = 0xff;
|
||||
info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
|
||||
info->battery_flag = 0x80;
|
||||
} else if (charging < 8) {
|
||||
info->battery_status = APM_BATTERY_STATUS_CHARGING;
|
||||
info->battery_flag = 0x08;
|
||||
info->ac_line_status = 0xff;
|
||||
} else if (percentage <= APM_CRITICAL) {
|
||||
battery_status = APM_BATTERY_STATUS_CRITICAL;
|
||||
battery_flag = 0x04;
|
||||
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
|
||||
info->battery_flag = 0x04;
|
||||
} else if (percentage <= APM_LOW) {
|
||||
battery_status = APM_BATTERY_STATUS_LOW;
|
||||
battery_flag = 0x02;
|
||||
info->battery_status = APM_BATTERY_STATUS_LOW;
|
||||
info->battery_flag = 0x02;
|
||||
} else {
|
||||
battery_status = APM_BATTERY_STATUS_HIGH;
|
||||
battery_flag = 0x01;
|
||||
info->battery_status = APM_BATTERY_STATUS_HIGH;
|
||||
info->battery_flag = 0x01;
|
||||
}
|
||||
|
||||
p += sprintf(p, "1.0 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
|
||||
APM_32_BIT_SUPPORT,
|
||||
ac_line_status,
|
||||
battery_status,
|
||||
battery_flag,
|
||||
percentage,
|
||||
time_units,
|
||||
"min");
|
||||
p += sprintf(p, "bat=%d backup=%d charge=%d\n",
|
||||
battery, backup, charging);
|
||||
|
||||
return p - buf;
|
||||
info->units = 0;
|
||||
}
|
||||
|
||||
static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
|
||||
@ -96,14 +76,14 @@ static int __init hp6x0_apm_init(void)
|
||||
int ret;
|
||||
|
||||
ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
|
||||
IRQF_DISABLED, MODNAME, 0);
|
||||
IRQF_DISABLED, MODNAME, NULL);
|
||||
if (unlikely(ret < 0)) {
|
||||
printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
|
||||
HP680_BTN_IRQ);
|
||||
return ret;
|
||||
}
|
||||
|
||||
apm_get_info = hp6x0_apm_get_info;
|
||||
apm_get_power_status = hp6x0_apm_get_power_status;
|
||||
|
||||
return ret;
|
||||
}
|
||||
@ -111,7 +91,7 @@ static int __init hp6x0_apm_init(void)
|
||||
static void __exit hp6x0_apm_exit(void)
|
||||
{
|
||||
free_irq(HP680_BTN_IRQ, 0);
|
||||
apm_get_info = 0;
|
||||
apm_get_info = NULL;
|
||||
}
|
||||
|
||||
module_init(hp6x0_apm_init);
|
||||
|
@ -19,6 +19,5 @@ obj-$(CONFIG_SH_CPU_FREQ) += cpufreq.o
|
||||
obj-$(CONFIG_MODULES) += module.o
|
||||
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
|
||||
obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o
|
||||
obj-$(CONFIG_APM) += apm.o
|
||||
obj-$(CONFIG_PM) += pm.o
|
||||
obj-$(CONFIG_STACKTRACE) += stacktrace.o
|
||||
|
@ -1,538 +0,0 @@
|
||||
/*
|
||||
* bios-less APM driver for hp680
|
||||
*
|
||||
* Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
|
||||
*
|
||||
* based on ARM APM driver by
|
||||
* Jamey Hicks <jamey@crl.dec.com>
|
||||
*
|
||||
* adapted from the APM BIOS driver for Linux by
|
||||
* Stephen Rothwell (sfr@linuxcare.com)
|
||||
*
|
||||
* APM 1.2 Reference:
|
||||
* Intel Corporation, Microsoft Corporation. Advanced Power Management
|
||||
* (APM) BIOS Interface Specification, Revision 1.2, February 1996.
|
||||
*
|
||||
* [This document is available from Microsoft at:
|
||||
* http://www.microsoft.com/hwdev/busbios/amp_12.htm]
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/proc_fs.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/apm_bios.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/pm_legacy.h>
|
||||
#include <asm/apm.h>
|
||||
|
||||
#define MODNAME "apm"
|
||||
|
||||
/*
|
||||
* The apm_bios device is one of the misc char devices.
|
||||
* This is its minor number.
|
||||
*/
|
||||
#define APM_MINOR_DEV 134
|
||||
|
||||
/*
|
||||
* Maximum number of events stored
|
||||
*/
|
||||
#define APM_MAX_EVENTS 16
|
||||
|
||||
struct apm_queue {
|
||||
unsigned int event_head;
|
||||
unsigned int event_tail;
|
||||
apm_event_t events[APM_MAX_EVENTS];
|
||||
};
|
||||
|
||||
/*
|
||||
* The per-file APM data
|
||||
*/
|
||||
struct apm_user {
|
||||
struct list_head list;
|
||||
|
||||
unsigned int suser: 1;
|
||||
unsigned int writer: 1;
|
||||
unsigned int reader: 1;
|
||||
|
||||
int suspend_result;
|
||||
unsigned int suspend_state;
|
||||
#define SUSPEND_NONE 0 /* no suspend pending */
|
||||
#define SUSPEND_PENDING 1 /* suspend pending read */
|
||||
#define SUSPEND_READ 2 /* suspend read, pending ack */
|
||||
#define SUSPEND_ACKED 3 /* suspend acked */
|
||||
#define SUSPEND_DONE 4 /* suspend completed */
|
||||
|
||||
struct apm_queue queue;
|
||||
};
|
||||
|
||||
/*
|
||||
* Local variables
|
||||
*/
|
||||
static int suspends_pending;
|
||||
|
||||
static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
|
||||
static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
|
||||
|
||||
/*
|
||||
* This is a list of everyone who has opened /dev/apm_bios
|
||||
*/
|
||||
static DECLARE_RWSEM(user_list_lock);
|
||||
static LIST_HEAD(apm_user_list);
|
||||
|
||||
/*
|
||||
* kapmd info. kapmd provides us a process context to handle
|
||||
* "APM" events within - specifically necessary if we're going
|
||||
* to be suspending the system.
|
||||
*/
|
||||
static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait);
|
||||
static DECLARE_COMPLETION(kapmd_exit);
|
||||
static DEFINE_SPINLOCK(kapmd_queue_lock);
|
||||
static struct apm_queue kapmd_queue;
|
||||
|
||||
int apm_suspended;
|
||||
EXPORT_SYMBOL(apm_suspended);
|
||||
|
||||
/* Platform-specific apm_read_proc(). */
|
||||
int (*apm_get_info)(char *buf, char **start, off_t fpos, int length);
|
||||
EXPORT_SYMBOL(apm_get_info);
|
||||
|
||||
/*
|
||||
* APM event queue management.
|
||||
*/
|
||||
static inline int queue_empty(struct apm_queue *q)
|
||||
{
|
||||
return q->event_head == q->event_tail;
|
||||
}
|
||||
|
||||
static inline apm_event_t queue_get_event(struct apm_queue *q)
|
||||
{
|
||||
q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
|
||||
return q->events[q->event_tail];
|
||||
}
|
||||
|
||||
static void queue_add_event(struct apm_queue *q, apm_event_t event)
|
||||
{
|
||||
q->event_head = (q->event_head + 1) % APM_MAX_EVENTS;
|
||||
if (q->event_head == q->event_tail) {
|
||||
static int notified;
|
||||
|
||||
if (notified++ == 0)
|
||||
printk(KERN_ERR "apm: an event queue overflowed\n");
|
||||
|
||||
q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
|
||||
}
|
||||
q->events[q->event_head] = event;
|
||||
}
|
||||
|
||||
static void queue_event_one_user(struct apm_user *as, apm_event_t event)
|
||||
{
|
||||
if (as->suser && as->writer) {
|
||||
switch (event) {
|
||||
case APM_SYS_SUSPEND:
|
||||
case APM_USER_SUSPEND:
|
||||
/*
|
||||
* If this user already has a suspend pending,
|
||||
* don't queue another one.
|
||||
*/
|
||||
if (as->suspend_state != SUSPEND_NONE)
|
||||
return;
|
||||
|
||||
as->suspend_state = SUSPEND_PENDING;
|
||||
suspends_pending++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
queue_add_event(&as->queue, event);
|
||||
}
|
||||
|
||||
static void queue_event(apm_event_t event, struct apm_user *sender)
|
||||
{
|
||||
struct apm_user *as;
|
||||
|
||||
down_read(&user_list_lock);
|
||||
|
||||
list_for_each_entry(as, &apm_user_list, list)
|
||||
if (as != sender && as->reader)
|
||||
queue_event_one_user(as, event);
|
||||
|
||||
up_read(&user_list_lock);
|
||||
wake_up_interruptible(&apm_waitqueue);
|
||||
}
|
||||
|
||||
/**
|
||||
* apm_queue_event - queue an APM event for kapmd
|
||||
* @event: APM event
|
||||
*
|
||||
* Queue an APM event for kapmd to process and ultimately take the
|
||||
* appropriate action. Only a subset of events are handled:
|
||||
* %APM_LOW_BATTERY
|
||||
* %APM_POWER_STATUS_CHANGE
|
||||
* %APM_USER_SUSPEND
|
||||
* %APM_SYS_SUSPEND
|
||||
* %APM_CRITICAL_SUSPEND
|
||||
*/
|
||||
void apm_queue_event(apm_event_t event)
|
||||
{
|
||||
spin_lock_irq(&kapmd_queue_lock);
|
||||
queue_add_event(&kapmd_queue, event);
|
||||
spin_unlock_irq(&kapmd_queue_lock);
|
||||
|
||||
wake_up_interruptible(&kapmd_wait);
|
||||
}
|
||||
EXPORT_SYMBOL(apm_queue_event);
|
||||
|
||||
static void apm_suspend(void)
|
||||
{
|
||||
struct apm_user *as;
|
||||
int err;
|
||||
|
||||
apm_suspended = 1;
|
||||
err = pm_suspend(PM_SUSPEND_MEM);
|
||||
|
||||
/*
|
||||
* Anyone on the APM queues will think we're still suspended.
|
||||
* Send a message so everyone knows we're now awake again.
|
||||
*/
|
||||
queue_event(APM_NORMAL_RESUME, NULL);
|
||||
|
||||
/*
|
||||
* Finally, wake up anyone who is sleeping on the suspend.
|
||||
*/
|
||||
down_read(&user_list_lock);
|
||||
list_for_each_entry(as, &apm_user_list, list) {
|
||||
as->suspend_result = err;
|
||||
as->suspend_state = SUSPEND_DONE;
|
||||
}
|
||||
up_read(&user_list_lock);
|
||||
|
||||
wake_up(&apm_suspend_waitqueue);
|
||||
apm_suspended = 0;
|
||||
}
|
||||
|
||||
static ssize_t apm_read(struct file *fp, char __user *buf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
struct apm_user *as = fp->private_data;
|
||||
apm_event_t event;
|
||||
int i = count, ret = 0;
|
||||
|
||||
if (count < sizeof(apm_event_t))
|
||||
return -EINVAL;
|
||||
|
||||
if (queue_empty(&as->queue) && fp->f_flags & O_NONBLOCK)
|
||||
return -EAGAIN;
|
||||
|
||||
wait_event_interruptible(apm_waitqueue, !queue_empty(&as->queue));
|
||||
|
||||
while ((i >= sizeof(event)) && !queue_empty(&as->queue)) {
|
||||
event = queue_get_event(&as->queue);
|
||||
|
||||
ret = -EFAULT;
|
||||
if (copy_to_user(buf, &event, sizeof(event)))
|
||||
break;
|
||||
|
||||
if (event == APM_SYS_SUSPEND || event == APM_USER_SUSPEND)
|
||||
as->suspend_state = SUSPEND_READ;
|
||||
|
||||
buf += sizeof(event);
|
||||
i -= sizeof(event);
|
||||
}
|
||||
|
||||
if (i < count)
|
||||
ret = count - i;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static unsigned int apm_poll(struct file *fp, poll_table * wait)
|
||||
{
|
||||
struct apm_user *as = fp->private_data;
|
||||
|
||||
poll_wait(fp, &apm_waitqueue, wait);
|
||||
return queue_empty(&as->queue) ? 0 : POLLIN | POLLRDNORM;
|
||||
}
|
||||
|
||||
/*
|
||||
* apm_ioctl - handle APM ioctl
|
||||
*
|
||||
* APM_IOC_SUSPEND
|
||||
* This IOCTL is overloaded, and performs two functions. It is used to:
|
||||
* - initiate a suspend
|
||||
* - acknowledge a suspend read from /dev/apm_bios.
|
||||
* Only when everyone who has opened /dev/apm_bios with write permission
|
||||
* has acknowledge does the actual suspend happen.
|
||||
*/
|
||||
static int
|
||||
apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
|
||||
{
|
||||
struct apm_user *as = filp->private_data;
|
||||
unsigned long flags;
|
||||
int err = -EINVAL;
|
||||
|
||||
if (!as->suser || !as->writer)
|
||||
return -EPERM;
|
||||
|
||||
switch (cmd) {
|
||||
case APM_IOC_SUSPEND:
|
||||
as->suspend_result = -EINTR;
|
||||
|
||||
if (as->suspend_state == SUSPEND_READ) {
|
||||
/*
|
||||
* If we read a suspend command from /dev/apm_bios,
|
||||
* then the corresponding APM_IOC_SUSPEND ioctl is
|
||||
* interpreted as an acknowledge.
|
||||
*/
|
||||
as->suspend_state = SUSPEND_ACKED;
|
||||
suspends_pending--;
|
||||
} else {
|
||||
/*
|
||||
* Otherwise it is a request to suspend the system.
|
||||
* Queue an event for all readers, and expect an
|
||||
* acknowledge from all writers who haven't already
|
||||
* acknowledged.
|
||||
*/
|
||||
queue_event(APM_USER_SUSPEND, as);
|
||||
}
|
||||
|
||||
/*
|
||||
* If there are no further acknowledges required, suspend
|
||||
* the system.
|
||||
*/
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
|
||||
/*
|
||||
* Wait for the suspend/resume to complete. If there are
|
||||
* pending acknowledges, we wait here for them.
|
||||
*
|
||||
* Note that we need to ensure that the PM subsystem does
|
||||
* not kick us out of the wait when it suspends the threads.
|
||||
*/
|
||||
flags = current->flags;
|
||||
current->flags |= PF_NOFREEZE;
|
||||
|
||||
/*
|
||||
* Note: do not allow a thread which is acking the suspend
|
||||
* to escape until the resume is complete.
|
||||
*/
|
||||
if (as->suspend_state == SUSPEND_ACKED)
|
||||
wait_event(apm_suspend_waitqueue,
|
||||
as->suspend_state == SUSPEND_DONE);
|
||||
else
|
||||
wait_event_interruptible(apm_suspend_waitqueue,
|
||||
as->suspend_state == SUSPEND_DONE);
|
||||
|
||||
current->flags = flags;
|
||||
err = as->suspend_result;
|
||||
as->suspend_state = SUSPEND_NONE;
|
||||
break;
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int apm_release(struct inode * inode, struct file * filp)
|
||||
{
|
||||
struct apm_user *as = filp->private_data;
|
||||
filp->private_data = NULL;
|
||||
|
||||
down_write(&user_list_lock);
|
||||
list_del(&as->list);
|
||||
up_write(&user_list_lock);
|
||||
|
||||
/*
|
||||
* We are now unhooked from the chain. As far as new
|
||||
* events are concerned, we no longer exist. However, we
|
||||
* need to balance suspends_pending, which means the
|
||||
* possibility of sleeping.
|
||||
*/
|
||||
if (as->suspend_state != SUSPEND_NONE) {
|
||||
suspends_pending -= 1;
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
}
|
||||
|
||||
kfree(as);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int apm_open(struct inode * inode, struct file * filp)
|
||||
{
|
||||
struct apm_user *as;
|
||||
|
||||
as = kzalloc(sizeof(*as), GFP_KERNEL);
|
||||
if (as) {
|
||||
/*
|
||||
* XXX - this is a tiny bit broken, when we consider BSD
|
||||
* process accounting. If the device is opened by root, we
|
||||
* instantly flag that we used superuser privs. Who knows,
|
||||
* we might close the device immediately without doing a
|
||||
* privileged operation -- cevans
|
||||
*/
|
||||
as->suser = capable(CAP_SYS_ADMIN);
|
||||
as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
|
||||
as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
|
||||
|
||||
down_write(&user_list_lock);
|
||||
list_add(&as->list, &apm_user_list);
|
||||
up_write(&user_list_lock);
|
||||
|
||||
filp->private_data = as;
|
||||
}
|
||||
|
||||
return as ? 0 : -ENOMEM;
|
||||
}
|
||||
|
||||
static struct file_operations apm_bios_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = apm_read,
|
||||
.poll = apm_poll,
|
||||
.ioctl = apm_ioctl,
|
||||
.open = apm_open,
|
||||
.release = apm_release,
|
||||
};
|
||||
|
||||
static struct miscdevice apm_device = {
|
||||
.minor = APM_MINOR_DEV,
|
||||
.name = "apm_bios",
|
||||
.fops = &apm_bios_fops
|
||||
};
|
||||
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
/*
|
||||
* Arguments, with symbols from linux/apm_bios.h.
|
||||
*
|
||||
* 0) Linux driver version (this will change if format changes)
|
||||
* 1) APM BIOS Version. Usually 1.0, 1.1 or 1.2.
|
||||
* 2) APM flags from APM Installation Check (0x00):
|
||||
* bit 0: APM_16_BIT_SUPPORT
|
||||
* bit 1: APM_32_BIT_SUPPORT
|
||||
* bit 2: APM_IDLE_SLOWS_CLOCK
|
||||
* bit 3: APM_BIOS_DISABLED
|
||||
* bit 4: APM_BIOS_DISENGAGED
|
||||
* 3) AC line status
|
||||
* 0x00: Off-line
|
||||
* 0x01: On-line
|
||||
* 0x02: On backup power (BIOS >= 1.1 only)
|
||||
* 0xff: Unknown
|
||||
* 4) Battery status
|
||||
* 0x00: High
|
||||
* 0x01: Low
|
||||
* 0x02: Critical
|
||||
* 0x03: Charging
|
||||
* 0x04: Selected battery not present (BIOS >= 1.2 only)
|
||||
* 0xff: Unknown
|
||||
* 5) Battery flag
|
||||
* bit 0: High
|
||||
* bit 1: Low
|
||||
* bit 2: Critical
|
||||
* bit 3: Charging
|
||||
* bit 7: No system battery
|
||||
* 0xff: Unknown
|
||||
* 6) Remaining battery life (percentage of charge):
|
||||
* 0-100: valid
|
||||
* -1: Unknown
|
||||
* 7) Remaining battery life (time units):
|
||||
* Number of remaining minutes or seconds
|
||||
* -1: Unknown
|
||||
* 8) min = minutes; sec = seconds
|
||||
*/
|
||||
static int apm_read_proc(char *buf, char **start, off_t fpos, int length)
|
||||
{
|
||||
if (likely(apm_get_info))
|
||||
return apm_get_info(buf, start, fpos, length);
|
||||
|
||||
return -EINVAL;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int kapmd(void *arg)
|
||||
{
|
||||
daemonize("kapmd");
|
||||
current->flags |= PF_NOFREEZE;
|
||||
|
||||
do {
|
||||
apm_event_t event;
|
||||
|
||||
wait_event_interruptible(kapmd_wait,
|
||||
!queue_empty(&kapmd_queue) || !pm_active);
|
||||
|
||||
if (!pm_active)
|
||||
break;
|
||||
|
||||
spin_lock_irq(&kapmd_queue_lock);
|
||||
event = 0;
|
||||
if (!queue_empty(&kapmd_queue))
|
||||
event = queue_get_event(&kapmd_queue);
|
||||
spin_unlock_irq(&kapmd_queue_lock);
|
||||
|
||||
switch (event) {
|
||||
case 0:
|
||||
break;
|
||||
|
||||
case APM_LOW_BATTERY:
|
||||
case APM_POWER_STATUS_CHANGE:
|
||||
queue_event(event, NULL);
|
||||
break;
|
||||
|
||||
case APM_USER_SUSPEND:
|
||||
case APM_SYS_SUSPEND:
|
||||
queue_event(event, NULL);
|
||||
if (suspends_pending == 0)
|
||||
apm_suspend();
|
||||
break;
|
||||
|
||||
case APM_CRITICAL_SUSPEND:
|
||||
apm_suspend();
|
||||
break;
|
||||
}
|
||||
} while (1);
|
||||
|
||||
complete_and_exit(&kapmd_exit, 0);
|
||||
}
|
||||
|
||||
static int __init apm_init(void)
|
||||
{
|
||||
int ret;
|
||||
|
||||
pm_active = 1;
|
||||
|
||||
ret = kernel_thread(kapmd, NULL, CLONE_KERNEL);
|
||||
if (unlikely(ret < 0)) {
|
||||
pm_active = 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
create_proc_info_entry("apm", 0, NULL, apm_read_proc);
|
||||
|
||||
ret = misc_register(&apm_device);
|
||||
if (unlikely(ret != 0)) {
|
||||
remove_proc_entry("apm", NULL);
|
||||
|
||||
pm_active = 0;
|
||||
wake_up(&kapmd_wait);
|
||||
wait_for_completion(&kapmd_exit);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void __exit apm_exit(void)
|
||||
{
|
||||
misc_deregister(&apm_device);
|
||||
remove_proc_entry("apm", NULL);
|
||||
|
||||
pm_active = 0;
|
||||
wake_up(&kapmd_wait);
|
||||
wait_for_completion(&kapmd_exit);
|
||||
}
|
||||
|
||||
module_init(apm_init);
|
||||
module_exit(apm_exit);
|
||||
|
||||
MODULE_AUTHOR("Stephen Rothwell, Andriy Skulysh");
|
||||
MODULE_DESCRIPTION("Advanced Power Management");
|
||||
MODULE_LICENSE("GPL");
|
@ -60,6 +60,8 @@ obj-$(CONFIG_BRIQ_PANEL) += briq_panel.o
|
||||
obj-$(CONFIG_PRINTER) += lp.o
|
||||
obj-$(CONFIG_TIPAR) += tipar.o
|
||||
|
||||
obj-$(CONFIG_APM_EMULATION) += apm-emulation.o
|
||||
|
||||
obj-$(CONFIG_DTLK) += dtlk.o
|
||||
obj-$(CONFIG_R3964) += n_r3964.o
|
||||
obj-$(CONFIG_APPLICOM) += applicom.o
|
||||
|
@ -1,5 +1,5 @@
|
||||
/*
|
||||
* bios-less APM driver for ARM Linux
|
||||
* bios-less APM driver for ARM Linux
|
||||
* Jamey Hicks <jamey@crl.dec.com>
|
||||
* adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com)
|
||||
*
|
||||
@ -19,6 +19,7 @@
|
||||
#include <linux/capability.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/apm-emulation.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/list.h>
|
||||
@ -27,7 +28,6 @@
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/delay.h>
|
||||
|
||||
#include <asm/apm.h> /* apm_power_info */
|
||||
#include <asm/system.h>
|
||||
|
||||
/*
|
||||
@ -225,7 +225,7 @@ static void apm_suspend(void)
|
||||
list_for_each_entry(as, &apm_user_list, list) {
|
||||
if (as->suspend_state == SUSPEND_WAIT ||
|
||||
as->suspend_state == SUSPEND_ACKED) {
|
||||
as->suspend_result = err;
|
||||
as->suspend_result = err;
|
||||
as->suspend_state = SUSPEND_DONE;
|
||||
}
|
||||
}
|
||||
@ -529,7 +529,7 @@ static int apm_get_info(char *buf, char **start, off_t fpos, int length)
|
||||
info.battery_flag, info.battery_life,
|
||||
info.time, units);
|
||||
|
||||
return ret;
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
|
@ -1,64 +0,0 @@
|
||||
/* -*- linux-c -*-
|
||||
*
|
||||
* (C) 2003 zecke@handhelds.org
|
||||
*
|
||||
* GPL version 2
|
||||
*
|
||||
* based on arch/arm/kernel/apm.c
|
||||
* factor out the information needed by architectures to provide
|
||||
* apm status
|
||||
*
|
||||
*
|
||||
*/
|
||||
#ifndef ARM_ASM_SA1100_APM_H
|
||||
#define ARM_ASM_SA1100_APM_H
|
||||
|
||||
#include <linux/apm_bios.h>
|
||||
|
||||
/*
|
||||
* This structure gets filled in by the machine specific 'get_power_status'
|
||||
* implementation. Any fields which are not set default to a safe value.
|
||||
*/
|
||||
struct apm_power_info {
|
||||
unsigned char ac_line_status;
|
||||
#define APM_AC_OFFLINE 0
|
||||
#define APM_AC_ONLINE 1
|
||||
#define APM_AC_BACKUP 2
|
||||
#define APM_AC_UNKNOWN 0xff
|
||||
|
||||
unsigned char battery_status;
|
||||
#define APM_BATTERY_STATUS_HIGH 0
|
||||
#define APM_BATTERY_STATUS_LOW 1
|
||||
#define APM_BATTERY_STATUS_CRITICAL 2
|
||||
#define APM_BATTERY_STATUS_CHARGING 3
|
||||
#define APM_BATTERY_STATUS_NOT_PRESENT 4
|
||||
#define APM_BATTERY_STATUS_UNKNOWN 0xff
|
||||
|
||||
unsigned char battery_flag;
|
||||
#define APM_BATTERY_FLAG_HIGH (1 << 0)
|
||||
#define APM_BATTERY_FLAG_LOW (1 << 1)
|
||||
#define APM_BATTERY_FLAG_CRITICAL (1 << 2)
|
||||
#define APM_BATTERY_FLAG_CHARGING (1 << 3)
|
||||
#define APM_BATTERY_FLAG_NOT_PRESENT (1 << 7)
|
||||
#define APM_BATTERY_FLAG_UNKNOWN 0xff
|
||||
|
||||
int battery_life;
|
||||
int time;
|
||||
int units;
|
||||
#define APM_UNITS_MINS 0
|
||||
#define APM_UNITS_SECS 1
|
||||
#define APM_UNITS_UNKNOWN -1
|
||||
|
||||
};
|
||||
|
||||
/*
|
||||
* This allows machines to provide their own "apm get power status" function.
|
||||
*/
|
||||
extern void (*apm_get_power_status)(struct apm_power_info *);
|
||||
|
||||
/*
|
||||
* Queue an event (APM_SYS_SUSPEND or APM_CRITICAL_SUSPEND)
|
||||
*/
|
||||
void apm_queue_event(apm_event_t event);
|
||||
|
||||
#endif
|
@ -1,46 +0,0 @@
|
||||
/*
|
||||
* Copyright 2006 (c) Andriy Skulysh <askulysh@gmail.com>
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __ASM_SH_APM_H
|
||||
#define __ASM_SH_APM_H
|
||||
|
||||
#define APM_AC_OFFLINE 0
|
||||
#define APM_AC_ONLINE 1
|
||||
#define APM_AC_BACKUP 2
|
||||
#define APM_AC_UNKNOWN 0xff
|
||||
|
||||
#define APM_BATTERY_STATUS_HIGH 0
|
||||
#define APM_BATTERY_STATUS_LOW 1
|
||||
#define APM_BATTERY_STATUS_CRITICAL 2
|
||||
#define APM_BATTERY_STATUS_CHARGING 3
|
||||
#define APM_BATTERY_STATUS_NOT_PRESENT 4
|
||||
#define APM_BATTERY_STATUS_UNKNOWN 0xff
|
||||
|
||||
#define APM_BATTERY_LIFE_UNKNOWN 0xFFFF
|
||||
#define APM_BATTERY_LIFE_MINUTES 0x8000
|
||||
#define APM_BATTERY_LIFE_VALUE_MASK 0x7FFF
|
||||
|
||||
#define APM_BATTERY_FLAG_HIGH (1 << 0)
|
||||
#define APM_BATTERY_FLAG_LOW (1 << 1)
|
||||
#define APM_BATTERY_FLAG_CRITICAL (1 << 2)
|
||||
#define APM_BATTERY_FLAG_CHARGING (1 << 3)
|
||||
#define APM_BATTERY_FLAG_NOT_PRESENT (1 << 7)
|
||||
#define APM_BATTERY_FLAG_UNKNOWN 0xff
|
||||
|
||||
#define APM_UNITS_MINS 0
|
||||
#define APM_UNITS_SECS 1
|
||||
#define APM_UNITS_UNKNOWN -1
|
||||
|
||||
|
||||
extern int (*apm_get_info)(char *buf, char **start, off_t fpos, int length);
|
||||
extern int apm_suspended;
|
||||
|
||||
void apm_queue_event(apm_event_t event);
|
||||
|
||||
#endif
|
@ -7,11 +7,9 @@
|
||||
* based on arch/arm/kernel/apm.c
|
||||
* factor out the information needed by architectures to provide
|
||||
* apm status
|
||||
*
|
||||
*
|
||||
*/
|
||||
#ifndef MIPS_ASM_SA1100_APM_H
|
||||
#define MIPS_ASM_SA1100_APM_H
|
||||
#ifndef __LINUX_APM_EMULATION_H
|
||||
#define __LINUX_APM_EMULATION_H
|
||||
|
||||
#include <linux/apm_bios.h>
|
||||
|
||||
@ -61,4 +59,4 @@ extern void (*apm_get_power_status)(struct apm_power_info *);
|
||||
*/
|
||||
void apm_queue_event(apm_event_t event);
|
||||
|
||||
#endif
|
||||
#endif /* __LINUX_APM_EMULATION_H */
|
@ -131,3 +131,29 @@ config SUSPEND_SMP
|
||||
bool
|
||||
depends on HOTPLUG_CPU && X86 && PM
|
||||
default y
|
||||
|
||||
config APM_EMULATION
|
||||
tristate "Advanced Power Management Emulation"
|
||||
depends on PM && SYS_SUPPORTS_APM_EMULATION
|
||||
help
|
||||
APM is a BIOS specification for saving power using several different
|
||||
techniques. This is mostly useful for battery powered laptops with
|
||||
APM compliant BIOSes. If you say Y here, the system time will be
|
||||
reset after a RESUME operation, the /proc/apm device will provide
|
||||
battery status information, and user-space programs will receive
|
||||
notification of APM "events" (e.g. battery status change).
|
||||
|
||||
In order to use APM, you will need supporting software. For location
|
||||
and more information, read <file:Documentation/pm.txt> and the
|
||||
Battery Powered Linux mini-HOWTO, available from
|
||||
<http://www.tldp.org/docs.html#howto>.
|
||||
|
||||
This driver does not spin down disk drives (see the hdparm(8)
|
||||
manpage ("man 8 hdparm") for that), and it doesn't turn off
|
||||
VESA-compliant "green" monitors.
|
||||
|
||||
Generally, if you don't have a battery in your machine, there isn't
|
||||
much point in using this driver and you should say N. If you get
|
||||
random kernel OOPSes or reboots that don't seem to be related to
|
||||
anything, try disabling/enabling this option (or disabling/enabling
|
||||
APM in your BIOS).
|
||||
|
Loading…
Reference in New Issue
Block a user