[POWERPC] apm_emu: Use generic apm-emulation
This patch removes a huge amount of code that is now in common code in drivers/char/apm-emulation.c Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Johannes Berg
Paul Mackerras
Родитель
6bfeccdc11
Коммит
b302887854
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@ -117,6 +117,9 @@ config GENERIC_BUG
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default y
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depends on BUG
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config SYS_SUPPORTS_APM_EMULATION
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bool
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config DEFAULT_UIMAGE
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bool
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help
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@ -109,7 +109,9 @@ config PMAC_SMU
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config PMAC_APM_EMU
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tristate "APM emulation"
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depends on PPC_PMAC && PPC32 && PM && ADB_PMU
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select SYS_SUPPORTS_APM_EMULATION
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select APM_EMULATION
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depends on ADB_PMU && PM
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config PMAC_MEDIABAY
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bool "Support PowerBook hotswap media bay"
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@ -1,9 +1,7 @@
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/* APM emulation layer for PowerMac
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*
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* Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org)
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/*
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* APM emulation for PMU-based machines
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*
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* Lots of code inherited from apm.c, see appropriate notice in
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* arch/i386/kernel/apm.c
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* Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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@ -18,429 +16,39 @@
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*
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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/types.h>
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#include <linux/stddef.h>
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#include <linux/timer.h>
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#include <linux/fcntl.h>
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#include <linux/slab.h>
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#include <linux/stat.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/init.h>
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#include <linux/sched.h>
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#include <linux/pm.h>
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#include <linux/kernel.h>
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#include <linux/smp_lock.h>
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#include <linux/module.h>
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#include <linux/apm-emulation.h>
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#include <linux/adb.h>
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#include <linux/pmu.h>
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#include <asm/system.h>
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#include <asm/uaccess.h>
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#include <asm/machdep.h>
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(args...) printk(KERN_DEBUG args)
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//#define DBG(args...) xmon_printf(args)
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#else
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#define DBG(args...) do { } while (0)
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#endif
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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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* Maximum number of events stored
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*/
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#define APM_MAX_EVENTS 20
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#define FAKE_APM_BIOS_VERSION 0x0101
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#define APM_USER_NOTIFY_TIMEOUT (5*HZ)
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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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int magic;
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struct apm_user * next;
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int suser: 1;
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int suspend_waiting: 1;
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int suspends_pending;
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int suspends_read;
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int event_head;
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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 magic number in apm_user
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*/
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#define APM_BIOS_MAGIC 0x4101
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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 DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
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static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
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static struct apm_user * user_list;
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static void apm_notify_sleep(struct pmu_sleep_notifier *self, int when);
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static struct pmu_sleep_notifier apm_sleep_notifier = {
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apm_notify_sleep,
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SLEEP_LEVEL_USERLAND,
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};
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static const char driver_version[] = "0.5"; /* no spaces */
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#ifdef DEBUG
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static char * apm_event_name[] = {
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"system standby",
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"system suspend",
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"normal resume",
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"critical resume",
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"low battery",
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"power status change",
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"update time",
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"critical suspend",
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"user standby",
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"user suspend",
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"system standby resume",
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"capabilities change"
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};
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#define NR_APM_EVENT_NAME \
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(sizeof(apm_event_name) / sizeof(apm_event_name[0]))
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#endif
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static int queue_empty(struct apm_user *as)
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{
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return as->event_head == as->event_tail;
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}
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static apm_event_t get_queued_event(struct apm_user *as)
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{
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as->event_tail = (as->event_tail + 1) % APM_MAX_EVENTS;
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return as->events[as->event_tail];
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}
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static void queue_event(apm_event_t event, struct apm_user *sender)
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{
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struct apm_user * as;
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DBG("apm_emu: queue_event(%s)\n", apm_event_name[event-1]);
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if (user_list == NULL)
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return;
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for (as = user_list; as != NULL; as = as->next) {
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if (as == sender)
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continue;
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as->event_head = (as->event_head + 1) % APM_MAX_EVENTS;
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if (as->event_head == as->event_tail) {
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static int notified;
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if (notified++ == 0)
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printk(KERN_ERR "apm_emu: an event queue overflowed\n");
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as->event_tail = (as->event_tail + 1) % APM_MAX_EVENTS;
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}
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as->events[as->event_head] = event;
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if (!as->suser)
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continue;
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switch (event) {
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case APM_SYS_SUSPEND:
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case APM_USER_SUSPEND:
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as->suspends_pending++;
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suspends_pending++;
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break;
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case APM_NORMAL_RESUME:
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as->suspend_waiting = 0;
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break;
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}
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}
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wake_up_interruptible(&apm_waitqueue);
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}
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static int check_apm_user(struct apm_user *as, const char *func)
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{
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if ((as == NULL) || (as->magic != APM_BIOS_MAGIC)) {
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printk(KERN_ERR "apm_emu: %s passed bad filp\n", func);
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return 1;
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}
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return 0;
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}
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static ssize_t do_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
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{
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struct apm_user * as;
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size_t i;
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apm_event_t event;
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DECLARE_WAITQUEUE(wait, current);
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as = fp->private_data;
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if (check_apm_user(as, "read"))
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return -EIO;
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if (count < sizeof(apm_event_t))
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return -EINVAL;
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if (queue_empty(as)) {
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if (fp->f_flags & O_NONBLOCK)
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return -EAGAIN;
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add_wait_queue(&apm_waitqueue, &wait);
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repeat:
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set_current_state(TASK_INTERRUPTIBLE);
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if (queue_empty(as) && !signal_pending(current)) {
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schedule();
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goto repeat;
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&apm_waitqueue, &wait);
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}
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i = count;
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while ((i >= sizeof(event)) && !queue_empty(as)) {
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event = get_queued_event(as);
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DBG("apm_emu: do_read, returning: %s\n", apm_event_name[event-1]);
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if (copy_to_user(buf, &event, sizeof(event))) {
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if (i < count)
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break;
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return -EFAULT;
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}
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switch (event) {
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case APM_SYS_SUSPEND:
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case APM_USER_SUSPEND:
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as->suspends_read++;
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break;
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}
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buf += sizeof(event);
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i -= sizeof(event);
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}
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if (i < count)
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return count - i;
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if (signal_pending(current))
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return -ERESTARTSYS;
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return 0;
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}
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static unsigned int do_poll(struct file *fp, poll_table * wait)
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{
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struct apm_user * as;
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as = fp->private_data;
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if (check_apm_user(as, "poll"))
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return 0;
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poll_wait(fp, &apm_waitqueue, wait);
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if (!queue_empty(as))
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return POLLIN | POLLRDNORM;
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return 0;
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}
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static int do_ioctl(struct inode * inode, struct file *filp,
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u_int cmd, u_long arg)
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{
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struct apm_user * as;
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DECLARE_WAITQUEUE(wait, current);
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as = filp->private_data;
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if (check_apm_user(as, "ioctl"))
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return -EIO;
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if (!as->suser)
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return -EPERM;
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switch (cmd) {
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case APM_IOC_SUSPEND:
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/* If a suspend message was sent to userland, we
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* consider this as a confirmation message
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*/
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if (as->suspends_read > 0) {
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as->suspends_read--;
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as->suspends_pending--;
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suspends_pending--;
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} else {
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// Route to PMU suspend ?
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break;
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}
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as->suspend_waiting = 1;
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add_wait_queue(&apm_waitqueue, &wait);
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DBG("apm_emu: ioctl waking up sleep waiter !\n");
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wake_up(&apm_suspend_waitqueue);
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mb();
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while(as->suspend_waiting && !signal_pending(current)) {
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set_current_state(TASK_INTERRUPTIBLE);
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schedule();
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&apm_waitqueue, &wait);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int do_release(struct inode * inode, struct file * filp)
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{
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struct apm_user * as;
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as = filp->private_data;
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if (check_apm_user(as, "release"))
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return 0;
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filp->private_data = NULL;
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lock_kernel();
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if (as->suspends_pending > 0) {
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suspends_pending -= as->suspends_pending;
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if (suspends_pending <= 0)
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wake_up(&apm_suspend_waitqueue);
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}
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if (user_list == as)
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user_list = as->next;
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else {
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struct apm_user * as1;
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for (as1 = user_list;
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(as1 != NULL) && (as1->next != as);
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as1 = as1->next)
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;
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if (as1 == NULL)
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printk(KERN_ERR "apm: filp not in user list\n");
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else
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as1->next = as->next;
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}
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unlock_kernel();
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kfree(as);
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return 0;
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}
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static int do_open(struct inode * inode, struct file * filp)
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{
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struct apm_user * as;
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as = kmalloc(sizeof(*as), GFP_KERNEL);
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if (as == NULL) {
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printk(KERN_ERR "apm: cannot allocate struct of size %d bytes\n",
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sizeof(*as));
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return -ENOMEM;
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}
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as->magic = APM_BIOS_MAGIC;
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as->event_tail = as->event_head = 0;
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as->suspends_pending = 0;
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as->suspends_read = 0;
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/*
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* XXX - this is a tiny bit broken, when we consider BSD
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* process accounting. If the device is opened by root, we
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* instantly flag that we used superuser privs. Who knows,
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* we might close the device immediately without doing a
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* privileged operation -- cevans
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*/
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as->suser = capable(CAP_SYS_ADMIN);
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as->next = user_list;
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user_list = as;
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filp->private_data = as;
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DBG("apm_emu: opened by %s, suser: %d\n", current->comm, (int)as->suser);
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return 0;
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}
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/* Wait for all clients to ack the suspend request. APM API
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* doesn't provide a way to NAK, but this could be added
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* here.
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*/
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static void wait_all_suspend(void)
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{
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DECLARE_WAITQUEUE(wait, current);
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add_wait_queue(&apm_suspend_waitqueue, &wait);
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DBG("apm_emu: wait_all_suspend(), suspends_pending: %d\n", suspends_pending);
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while(suspends_pending > 0) {
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set_current_state(TASK_UNINTERRUPTIBLE);
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schedule();
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}
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&apm_suspend_waitqueue, &wait);
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DBG("apm_emu: wait_all_suspend() - complete !\n");
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}
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static void apm_notify_sleep(struct pmu_sleep_notifier *self, int when)
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{
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switch(when) {
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case PBOOK_SLEEP_REQUEST:
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queue_event(APM_SYS_SUSPEND, NULL);
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wait_all_suspend();
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break;
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case PBOOK_WAKE:
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queue_event(APM_NORMAL_RESUME, NULL);
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break;
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}
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}
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#define APM_CRITICAL 10
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#define APM_LOW 30
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static int apm_emu_get_info(char *buf, char **start, off_t fpos, int length)
|
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static void pmu_apm_get_power_status(struct apm_power_info *info)
|
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{
|
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/* Arguments, with symbols from linux/apm_bios.h. Information is
|
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from the Get Power Status (0x0a) call unless otherwise noted.
|
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int percentage = -1;
|
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int batteries = 0;
|
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int time_units = -1;
|
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int real_count = 0;
|
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int i;
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char charging = 0;
|
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long charge = -1;
|
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long amperage = 0;
|
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unsigned long btype = 0;
|
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|
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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
|
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bit 1: APM_32_BIT_SUPPORT
|
||||
bit 2: APM_IDLE_SLOWS_CLOCK
|
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bit 3: APM_BIOS_DISABLED
|
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bit 4: APM_BIOS_DISENGAGED
|
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3) AC line status
|
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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
|
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bit 0: High
|
||||
bit 1: Low
|
||||
bit 2: Critical
|
||||
bit 3: Charging
|
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bit 7: No system battery
|
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0xff: Unknown
|
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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 */
|
||||
info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
|
||||
info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
|
||||
info->units = APM_UNITS_MINS;
|
||||
|
||||
unsigned short ac_line_status;
|
||||
unsigned short battery_status = 0;
|
||||
unsigned short battery_flag = 0xff;
|
||||
int percentage = -1;
|
||||
int time_units = -1;
|
||||
int real_count = 0;
|
||||
int i;
|
||||
char * p = buf;
|
||||
char charging = 0;
|
||||
long charge = -1;
|
||||
long amperage = 0;
|
||||
unsigned long btype = 0;
|
||||
if (pmu_power_flags & PMU_PWR_AC_PRESENT)
|
||||
info->ac_line_status = APM_AC_ONLINE;
|
||||
else
|
||||
info->ac_line_status = APM_AC_OFFLINE;
|
||||
|
||||
ac_line_status = ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0);
|
||||
for (i=0; i<pmu_battery_count; i++) {
|
||||
if (pmu_batteries[i].flags & PMU_BATT_PRESENT) {
|
||||
battery_status++;
|
||||
batteries++;
|
||||
if (percentage < 0)
|
||||
percentage = 0;
|
||||
if (charge < 0)
|
||||
|
|
@ -456,9 +64,9 @@ static int apm_emu_get_info(char *buf, char **start, off_t fpos, int length)
|
|||
charging++;
|
||||
}
|
||||
}
|
||||
if (0 == battery_status)
|
||||
ac_line_status = 1;
|
||||
battery_status = 0xff;
|
||||
if (batteries == 0)
|
||||
info->ac_line_status = APM_AC_ONLINE;
|
||||
|
||||
if (real_count) {
|
||||
if (amperage < 0) {
|
||||
if (btype == PMU_BATT_TYPE_SMART)
|
||||
|
|
@ -468,85 +76,44 @@ static int apm_emu_get_info(char *buf, char **start, off_t fpos, int length)
|
|||
}
|
||||
percentage /= real_count;
|
||||
if (charging > 0) {
|
||||
battery_status = 0x03;
|
||||
battery_flag = 0x08;
|
||||
info->battery_status = APM_BATTERY_STATUS_CHARGING;
|
||||
info->battery_flag = APM_BATTERY_FLAG_CHARGING;
|
||||
} else if (percentage <= APM_CRITICAL) {
|
||||
battery_status = 0x02;
|
||||
battery_flag = 0x04;
|
||||
info->battery_status = APM_BATTERY_STATUS_CRITICAL;
|
||||
info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
|
||||
} else if (percentage <= APM_LOW) {
|
||||
battery_status = 0x01;
|
||||
battery_flag = 0x02;
|
||||
info->battery_status = APM_BATTERY_STATUS_LOW;
|
||||
info->battery_flag = APM_BATTERY_FLAG_LOW;
|
||||
} else {
|
||||
battery_status = 0x00;
|
||||
battery_flag = 0x01;
|
||||
info->battery_status = APM_BATTERY_STATUS_HIGH;
|
||||
info->battery_flag = APM_BATTERY_FLAG_HIGH;
|
||||
}
|
||||
}
|
||||
p += sprintf(p, "%s %d.%d 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
|
||||
driver_version,
|
||||
(FAKE_APM_BIOS_VERSION >> 8) & 0xff,
|
||||
FAKE_APM_BIOS_VERSION & 0xff,
|
||||
0,
|
||||
ac_line_status,
|
||||
battery_status,
|
||||
battery_flag,
|
||||
percentage,
|
||||
time_units,
|
||||
"min");
|
||||
|
||||
return p - buf;
|
||||
info->battery_life = percentage;
|
||||
info->time = time_units;
|
||||
}
|
||||
|
||||
static const struct file_operations apm_bios_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.read = do_read,
|
||||
.poll = do_poll,
|
||||
.ioctl = do_ioctl,
|
||||
.open = do_open,
|
||||
.release = do_release,
|
||||
};
|
||||
|
||||
static struct miscdevice apm_device = {
|
||||
APM_MINOR_DEV,
|
||||
"apm_bios",
|
||||
&apm_bios_fops
|
||||
};
|
||||
|
||||
static int __init apm_emu_init(void)
|
||||
{
|
||||
struct proc_dir_entry *apm_proc;
|
||||
apm_get_power_status = pmu_apm_get_power_status;
|
||||
|
||||
if (sys_ctrler != SYS_CTRLER_PMU) {
|
||||
printk(KERN_INFO "apm_emu: Requires a machine with a PMU.\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
apm_proc = create_proc_info_entry("apm", 0, NULL, apm_emu_get_info);
|
||||
if (apm_proc)
|
||||
apm_proc->owner = THIS_MODULE;
|
||||
|
||||
if (misc_register(&apm_device) != 0)
|
||||
printk(KERN_INFO "Could not create misc. device for apm\n");
|
||||
|
||||
pmu_register_sleep_notifier(&apm_sleep_notifier);
|
||||
|
||||
printk(KERN_INFO "apm_emu: APM Emulation %s initialized.\n", driver_version);
|
||||
printk(KERN_INFO "apm_emu: PMU APM Emulation initialized.\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit apm_emu_exit(void)
|
||||
{
|
||||
pmu_unregister_sleep_notifier(&apm_sleep_notifier);
|
||||
misc_deregister(&apm_device);
|
||||
remove_proc_entry("apm", NULL);
|
||||
if (apm_get_power_status == pmu_apm_get_power_status)
|
||||
apm_get_power_status = NULL;
|
||||
|
||||
printk(KERN_INFO "apm_emu: APM Emulation removed.\n");
|
||||
printk(KERN_INFO "apm_emu: PMU APM Emulation removed.\n");
|
||||
}
|
||||
|
||||
module_init(apm_emu_init);
|
||||
module_exit(apm_emu_exit);
|
||||
|
||||
MODULE_AUTHOR("Benjamin Herrenschmidt");
|
||||
MODULE_DESCRIPTION("APM emulation layer for PowerMac");
|
||||
MODULE_DESCRIPTION("APM emulation for PowerMac");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
|
|
|
|||
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