projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 3aa770e7 AS |
1 | /* |
| 2 | * bios-less APM driver for hp680 | |
| 3 | * | |
| 4 | * Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com> | |
| 8b03c040 | 5 | * Copyright 2008 (c) Kristoffer Ericson <kristoffer.ericson@gmail.com> |
| 3aa770e7 AS |
6 | * |
| 7 | * This program is free software; you can redistribute it and/or | |
| 8 | * modify it under the terms of the GNU General Public License. | |
| 9 | */ | |
| 3aa770e7 | 10 | #include <linux/module.h> |
| 3aa770e7 AS |
11 | #include <linux/kernel.h> |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/interrupt.h> | |
| 0a9b0db1 PM |
14 | #include <linux/apm-emulation.h> |
| 15 | #include <linux/io.h> | |
| 3aa770e7 | 16 | #include <asm/adc.h> |
| 7639a454 | 17 | #include <mach/hp6xx.h> |
| 3aa770e7 | 18 | |
| 8b03c040 | 19 | /* percentage values */ |
| 3aa770e7 AS |
20 | #define APM_CRITICAL 10 |
| 21 | #define APM_LOW 30 | |
| 22 | ||
| 8b03c040 | 23 | /* resonably sane values */ |
| 8c8ee825 KE |
24 | #define HP680_BATTERY_MAX 898 |
| 25 | #define HP680_BATTERY_MIN 486 | |
| 26 | #define HP680_BATTERY_AC_ON 1023 | |
| 3aa770e7 AS |
27 | |
| 28 | #define MODNAME "hp6x0_apm" | |
| 29 | ||
| dd4f99b4 PM |
30 | #define PGDR 0xa400012c |
| 31 | ||
| 0a9b0db1 | 32 | static void hp6x0_apm_get_power_status(struct apm_power_info *info) |
| 3aa770e7 | 33 | { |
| 0a9b0db1 | 34 | int battery, backup, charging, percentage; |
| 3aa770e7 | 35 | u8 pgdr; |
| 3aa770e7 | 36 | |
| 0a9b0db1 PM |
37 | battery = adc_single(ADC_CHANNEL_BATTERY); |
| 38 | backup = adc_single(ADC_CHANNEL_BACKUP); | |
| 39 | charging = adc_single(ADC_CHANNEL_CHARGE); | |
| 3aa770e7 AS |
40 | |
| 41 | percentage = 100 * (battery - HP680_BATTERY_MIN) / | |
| 42 | (HP680_BATTERY_MAX - HP680_BATTERY_MIN); | |
| 43 | ||
| 8b03c040 KE |
44 | /* % of full battery */ |
| 45 | info->battery_life = percentage; | |
| 46 | ||
| 47 | /* We want our estimates in minutes */ | |
| 48 | info->units = 0; | |
| 49 | ||
| 50 | /* Extremely(!!) rough estimate, we will replace this with a datalist later on */ | |
| 51 | info->time = (2 * battery); | |
| 52 | ||
| 0a9b0db1 | 53 | info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ? |
| 3aa770e7 AS |
54 | APM_AC_ONLINE : APM_AC_OFFLINE; |
| 55 | ||
| 9d56dd3b | 56 | pgdr = __raw_readb(PGDR); |
| 3aa770e7 | 57 | if (pgdr & PGDR_MAIN_BATTERY_OUT) { |
| 0a9b0db1 PM |
58 | info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT; |
| 59 | info->battery_flag = 0x80; | |
| 60 | } else if (charging < 8) { | |
| 61 | info->battery_status = APM_BATTERY_STATUS_CHARGING; | |
| 62 | info->battery_flag = 0x08; | |
| 8b03c040 | 63 | info->ac_line_status = 0x01; |
| 3aa770e7 | 64 | } else if (percentage <= APM_CRITICAL) { |
| 0a9b0db1 PM |
65 | info->battery_status = APM_BATTERY_STATUS_CRITICAL; |
| 66 | info->battery_flag = 0x04; | |
| 3aa770e7 | 67 | } else if (percentage <= APM_LOW) { |
| 0a9b0db1 PM |
68 | info->battery_status = APM_BATTERY_STATUS_LOW; |
| 69 | info->battery_flag = 0x02; | |
| 3aa770e7 | 70 | } else { |
| 0a9b0db1 PM |
71 | info->battery_status = APM_BATTERY_STATUS_HIGH; |
| 72 | info->battery_flag = 0x01; | |
| 3aa770e7 | 73 | } |
| 3aa770e7 AS |
74 | } |
| 75 | ||
| 35f3c518 | 76 | static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev) |
| 3aa770e7 | 77 | { |
| 8c8ee825 | 78 | if (!APM_DISABLED) |
| 3aa770e7 AS |
79 | apm_queue_event(APM_USER_SUSPEND); |
| 80 | ||
| 81 | return IRQ_HANDLED; | |
| 82 | } | |
| 83 | ||
| 84 | static int __init hp6x0_apm_init(void) | |
| 85 | { | |
| 86 | int ret; | |
| 87 | ||
| 88 | ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt, | |
| 0a9b0db1 | 89 | IRQF_DISABLED, MODNAME, NULL); |
| 3aa770e7 AS |
90 | if (unlikely(ret < 0)) { |
| 91 | printk(KERN_ERR MODNAME ": IRQ %d request failed\n", | |
| 92 | HP680_BTN_IRQ); | |
| 93 | return ret; | |
| 94 | } | |
| 95 | ||
| 0a9b0db1 | 96 | apm_get_power_status = hp6x0_apm_get_power_status; |
| 3aa770e7 AS |
97 | |
| 98 | return ret; | |
| 99 | } | |
| 100 | ||
| 101 | static void __exit hp6x0_apm_exit(void) | |
| 102 | { | |
| 103 | free_irq(HP680_BTN_IRQ, 0); | |
| 3aa770e7 AS |
104 | } |
| 105 | ||
| 106 | module_init(hp6x0_apm_init); | |
| 107 | module_exit(hp6x0_apm_exit); | |
| 108 | ||
| 109 | MODULE_AUTHOR("Adriy Skulysh"); | |
| 110 | MODULE_DESCRIPTION("hp6xx Advanced Power Management"); | |
| 111 | MODULE_LICENSE("GPL"); |