Commit | Line | Data |
---|---|---|
b3028878 JB |
1 | /* |
2 | * APM emulation for PMU-based machines | |
1da177e4 | 3 | * |
b3028878 | 4 | * Copyright 2001 Benjamin Herrenschmidt (benh@kernel.crashing.org) |
1da177e4 LT |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * | |
17 | */ | |
18 | ||
1da177e4 | 19 | #include <linux/kernel.h> |
b3028878 JB |
20 | #include <linux/module.h> |
21 | #include <linux/apm-emulation.h> | |
1da177e4 LT |
22 | #include <linux/adb.h> |
23 | #include <linux/pmu.h> | |
24 | ||
1da177e4 LT |
25 | #define APM_CRITICAL 10 |
26 | #define APM_LOW 30 | |
27 | ||
b3028878 | 28 | static void pmu_apm_get_power_status(struct apm_power_info *info) |
1da177e4 | 29 | { |
b3028878 JB |
30 | int percentage = -1; |
31 | int batteries = 0; | |
32 | int time_units = -1; | |
33 | int real_count = 0; | |
34 | int i; | |
35 | char charging = 0; | |
36 | long charge = -1; | |
37 | long amperage = 0; | |
38 | unsigned long btype = 0; | |
39 | ||
40 | info->battery_status = APM_BATTERY_STATUS_UNKNOWN; | |
41 | info->battery_flag = APM_BATTERY_FLAG_UNKNOWN; | |
42 | info->units = APM_UNITS_MINS; | |
43 | ||
44 | if (pmu_power_flags & PMU_PWR_AC_PRESENT) | |
45 | info->ac_line_status = APM_AC_ONLINE; | |
46 | else | |
47 | info->ac_line_status = APM_AC_OFFLINE; | |
1da177e4 | 48 | |
1da177e4 LT |
49 | for (i=0; i<pmu_battery_count; i++) { |
50 | if (pmu_batteries[i].flags & PMU_BATT_PRESENT) { | |
b3028878 | 51 | batteries++; |
1da177e4 LT |
52 | if (percentage < 0) |
53 | percentage = 0; | |
54 | if (charge < 0) | |
55 | charge = 0; | |
56 | percentage += (pmu_batteries[i].charge * 100) / | |
57 | pmu_batteries[i].max_charge; | |
58 | charge += pmu_batteries[i].charge; | |
59 | amperage += pmu_batteries[i].amperage; | |
60 | if (btype == 0) | |
61 | btype = (pmu_batteries[i].flags & PMU_BATT_TYPE_MASK); | |
62 | real_count++; | |
63 | if ((pmu_batteries[i].flags & PMU_BATT_CHARGING)) | |
64 | charging++; | |
65 | } | |
66 | } | |
b3028878 JB |
67 | if (batteries == 0) |
68 | info->ac_line_status = APM_AC_ONLINE; | |
69 | ||
1da177e4 LT |
70 | if (real_count) { |
71 | if (amperage < 0) { | |
72 | if (btype == PMU_BATT_TYPE_SMART) | |
73 | time_units = (charge * 59) / (amperage * -1); | |
74 | else | |
75 | time_units = (charge * 16440) / (amperage * -60); | |
76 | } | |
77 | percentage /= real_count; | |
78 | if (charging > 0) { | |
b3028878 JB |
79 | info->battery_status = APM_BATTERY_STATUS_CHARGING; |
80 | info->battery_flag = APM_BATTERY_FLAG_CHARGING; | |
1da177e4 | 81 | } else if (percentage <= APM_CRITICAL) { |
b3028878 JB |
82 | info->battery_status = APM_BATTERY_STATUS_CRITICAL; |
83 | info->battery_flag = APM_BATTERY_FLAG_CRITICAL; | |
1da177e4 | 84 | } else if (percentage <= APM_LOW) { |
b3028878 JB |
85 | info->battery_status = APM_BATTERY_STATUS_LOW; |
86 | info->battery_flag = APM_BATTERY_FLAG_LOW; | |
1da177e4 | 87 | } else { |
b3028878 JB |
88 | info->battery_status = APM_BATTERY_STATUS_HIGH; |
89 | info->battery_flag = APM_BATTERY_FLAG_HIGH; | |
1da177e4 LT |
90 | } |
91 | } | |
1da177e4 | 92 | |
b3028878 JB |
93 | info->battery_life = percentage; |
94 | info->time = time_units; | |
1da177e4 LT |
95 | } |
96 | ||
1da177e4 LT |
97 | static int __init apm_emu_init(void) |
98 | { | |
b3028878 | 99 | apm_get_power_status = pmu_apm_get_power_status; |
1da177e4 | 100 | |
b3028878 | 101 | printk(KERN_INFO "apm_emu: PMU APM Emulation initialized.\n"); |
1da177e4 LT |
102 | |
103 | return 0; | |
104 | } | |
105 | ||
106 | static void __exit apm_emu_exit(void) | |
107 | { | |
b3028878 JB |
108 | if (apm_get_power_status == pmu_apm_get_power_status) |
109 | apm_get_power_status = NULL; | |
1da177e4 | 110 | |
b3028878 | 111 | printk(KERN_INFO "apm_emu: PMU APM Emulation removed.\n"); |
1da177e4 LT |
112 | } |
113 | ||
114 | module_init(apm_emu_init); | |
115 | module_exit(apm_emu_exit); | |
116 | ||
117 | MODULE_AUTHOR("Benjamin Herrenschmidt"); | |
b3028878 | 118 | MODULE_DESCRIPTION("APM emulation for PowerMac"); |
1da177e4 | 119 | MODULE_LICENSE("GPL"); |