Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / macintosh / apm_emu.c

diff --git a/kernel/drivers/macintosh/apm_emu.c b/kernel/drivers/macintosh/apm_emu.c
new file mode 100644 (file)
index 0000000..9821e63
--- /dev/null
+++ b/kernel/drivers/macintosh/apm_emu.c
@@ -0,0 +1,119 @@
+/*
+ * APM emulation for PMU-based machines
+ *
+ * Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/apm-emulation.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+#define APM_CRITICAL           10
+#define APM_LOW                        30
+
+static void pmu_apm_get_power_status(struct apm_power_info *info)
+{
+       int percentage = -1;
+       int batteries = 0;
+       int time_units = -1;
+       int real_count = 0;
+       int i;
+       char charging = 0;
+       long charge = -1;
+       long amperage = 0;
+       unsigned long btype = 0;
+
+       info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
+       info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
+       info->units = APM_UNITS_MINS;
+
+       if (pmu_power_flags & PMU_PWR_AC_PRESENT)
+               info->ac_line_status = APM_AC_ONLINE;
+       else
+               info->ac_line_status = APM_AC_OFFLINE;
+
+       for (i=0; i<pmu_battery_count; i++) {
+               if (pmu_batteries[i].flags & PMU_BATT_PRESENT) {
+                       batteries++;
+                       if (percentage < 0)
+                               percentage = 0;
+                       if (charge < 0)
+                               charge = 0;
+                       percentage += (pmu_batteries[i].charge * 100) /
+                               pmu_batteries[i].max_charge;
+                       charge += pmu_batteries[i].charge;
+                       amperage += pmu_batteries[i].amperage;
+                       if (btype == 0)
+                               btype = (pmu_batteries[i].flags & PMU_BATT_TYPE_MASK);
+                       real_count++;
+                       if ((pmu_batteries[i].flags & PMU_BATT_CHARGING))
+                               charging++;
+               }
+       }
+       if (batteries == 0)
+               info->ac_line_status = APM_AC_ONLINE;
+
+       if (real_count) {
+               if (amperage < 0) {
+                       if (btype == PMU_BATT_TYPE_SMART)
+                               time_units = (charge * 59) / (amperage * -1);
+                       else
+                               time_units = (charge * 16440) / (amperage * -60);
+               }
+               percentage /= real_count;
+               if (charging > 0) {
+                       info->battery_status = APM_BATTERY_STATUS_CHARGING;
+                       info->battery_flag = APM_BATTERY_FLAG_CHARGING;
+               } else if (percentage <= APM_CRITICAL) {
+                       info->battery_status = APM_BATTERY_STATUS_CRITICAL;
+                       info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
+               } else if (percentage <= APM_LOW) {
+                       info->battery_status = APM_BATTERY_STATUS_LOW;
+                       info->battery_flag = APM_BATTERY_FLAG_LOW;
+               } else {
+                       info->battery_status = APM_BATTERY_STATUS_HIGH;
+                       info->battery_flag = APM_BATTERY_FLAG_HIGH;
+               }
+       }
+
+       info->battery_life = percentage;
+       info->time = time_units;
+}
+
+static int __init apm_emu_init(void)
+{
+       apm_get_power_status = pmu_apm_get_power_status;
+
+       printk(KERN_INFO "apm_emu: PMU APM Emulation initialized.\n");
+
+       return 0;
+}
+
+static void __exit apm_emu_exit(void)
+{
+       if (apm_get_power_status == pmu_apm_get_power_status)
+               apm_get_power_status = NULL;
+
+       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 for PowerMac");
+MODULE_LICENSE("GPL");