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> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU General Public License. | |
| 8 | */ | |
| 3aa770e7 | 9 | #include <linux/module.h> |
| 3aa770e7 AS |
10 | #include <linux/kernel.h> |
| 11 | #include <linux/init.h> | |
| 12 | #include <linux/interrupt.h> | |
| 0a9b0db1 PM |
13 | #include <linux/apm-emulation.h> |
| 14 | #include <linux/io.h> | |
| 3aa770e7 | 15 | #include <asm/adc.h> |
| 082c44d2 | 16 | #include <asm/hp6xx.h> |
| 3aa770e7 AS |
17 | |
| 18 | #define SH7709_PGDR 0xa400012c | |
| 19 | ||
| 20 | #define APM_CRITICAL 10 | |
| 21 | #define APM_LOW 30 | |
| 22 | ||
| 8c8ee825 KE |
23 | #define HP680_BATTERY_MAX 898 |
| 24 | #define HP680_BATTERY_MIN 486 | |
| 25 | #define HP680_BATTERY_AC_ON 1023 | |
| 3aa770e7 AS |
26 | |
| 27 | #define MODNAME "hp6x0_apm" | |
| 28 | ||
| 0a9b0db1 | 29 | static void hp6x0_apm_get_power_status(struct apm_power_info *info) |
| 3aa770e7 | 30 | { |
| 0a9b0db1 | 31 | int battery, backup, charging, percentage; |
| 3aa770e7 | 32 | u8 pgdr; |
| 3aa770e7 | 33 | |
| 0a9b0db1 PM |
34 | battery = adc_single(ADC_CHANNEL_BATTERY); |
| 35 | backup = adc_single(ADC_CHANNEL_BACKUP); | |
| 36 | charging = adc_single(ADC_CHANNEL_CHARGE); | |
| 3aa770e7 AS |
37 | |
| 38 | percentage = 100 * (battery - HP680_BATTERY_MIN) / | |
| 39 | (HP680_BATTERY_MAX - HP680_BATTERY_MIN); | |
| 40 | ||
| 0a9b0db1 | 41 | info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ? |
| 3aa770e7 AS |
42 | APM_AC_ONLINE : APM_AC_OFFLINE; |
| 43 | ||
| 3aa770e7 AS |
44 | pgdr = ctrl_inb(SH7709_PGDR); |
| 45 | if (pgdr & PGDR_MAIN_BATTERY_OUT) { | |
| 0a9b0db1 PM |
46 | info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT; |
| 47 | info->battery_flag = 0x80; | |
| 48 | } else if (charging < 8) { | |
| 49 | info->battery_status = APM_BATTERY_STATUS_CHARGING; | |
| 50 | info->battery_flag = 0x08; | |
| 51 | info->ac_line_status = 0xff; | |
| 3aa770e7 | 52 | } else if (percentage <= APM_CRITICAL) { |
| 0a9b0db1 PM |
53 | info->battery_status = APM_BATTERY_STATUS_CRITICAL; |
| 54 | info->battery_flag = 0x04; | |
| 3aa770e7 | 55 | } else if (percentage <= APM_LOW) { |
| 0a9b0db1 PM |
56 | info->battery_status = APM_BATTERY_STATUS_LOW; |
| 57 | info->battery_flag = 0x02; | |
| 3aa770e7 | 58 | } else { |
| 0a9b0db1 PM |
59 | info->battery_status = APM_BATTERY_STATUS_HIGH; |
| 60 | info->battery_flag = 0x01; | |
| 3aa770e7 AS |
61 | } |
| 62 | ||
| 0a9b0db1 | 63 | info->units = 0; |
| 3aa770e7 AS |
64 | } |
| 65 | ||
| 35f3c518 | 66 | static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev) |
| 3aa770e7 | 67 | { |
| 8c8ee825 | 68 | if (!APM_DISABLED) |
| 3aa770e7 AS |
69 | apm_queue_event(APM_USER_SUSPEND); |
| 70 | ||
| 71 | return IRQ_HANDLED; | |
| 72 | } | |
| 73 | ||
| 74 | static int __init hp6x0_apm_init(void) | |
| 75 | { | |
| 76 | int ret; | |
| 77 | ||
| 78 | ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt, | |
| 0a9b0db1 | 79 | IRQF_DISABLED, MODNAME, NULL); |
| 3aa770e7 AS |
80 | if (unlikely(ret < 0)) { |
| 81 | printk(KERN_ERR MODNAME ": IRQ %d request failed\n", | |
| 82 | HP680_BTN_IRQ); | |
| 83 | return ret; | |
| 84 | } | |
| 85 | ||
| 0a9b0db1 | 86 | apm_get_power_status = hp6x0_apm_get_power_status; |
| 3aa770e7 AS |
87 | |
| 88 | return ret; | |
| 89 | } | |
| 90 | ||
| 91 | static void __exit hp6x0_apm_exit(void) | |
| 92 | { | |
| 93 | free_irq(HP680_BTN_IRQ, 0); | |
| 3aa770e7 AS |
94 | } |
| 95 | ||
| 96 | module_init(hp6x0_apm_init); | |
| 97 | module_exit(hp6x0_apm_exit); | |
| 98 | ||
| 99 | MODULE_AUTHOR("Adriy Skulysh"); | |
| 100 | MODULE_DESCRIPTION("hp6xx Advanced Power Management"); | |
| 101 | MODULE_LICENSE("GPL"); |