arch/sh/boards/hp6xx/hp6xx_apm.c

   1 /*
   2  * bios-less APM driver for hp680
   3  *
   4  * Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
   5 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
   6 =======
   7  * Copyright 2008 (c) Kristoffer Ericson <kristoffer.ericson@gmail.com>
   8 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License.
  12  */
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/apm-emulation.h>
  18 #include <linux/io.h>
  19 #include <asm/adc.h>
  20 #include <asm/hp6xx.h>
  21
  22 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  23 #define SH7709_PGDR                     0xa400012c
  24
  25 =======
  26 /* percentage values */
  27 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  28 #define APM_CRITICAL                    10
  29 #define APM_LOW                         30
  30
  31 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  32 =======
  33 /* resonably sane values */
  34 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  35 #define HP680_BATTERY_MAX               898
  36 #define HP680_BATTERY_MIN               486
  37 #define HP680_BATTERY_AC_ON             1023
  38
  39 #define MODNAME "hp6x0_apm"
  40
  41 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  42 =======
  43 #define PGDR    0xa400012c
  44
  45 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  46 static void hp6x0_apm_get_power_status(struct apm_power_info *info)
  47 {
  48         int battery, backup, charging, percentage;
  49         u8 pgdr;
  50
  51         battery         = adc_single(ADC_CHANNEL_BATTERY);
  52         backup          = adc_single(ADC_CHANNEL_BACKUP);
  53         charging        = adc_single(ADC_CHANNEL_CHARGE);
  54
  55         percentage = 100 * (battery - HP680_BATTERY_MIN) /
  56                            (HP680_BATTERY_MAX - HP680_BATTERY_MIN);
  57
  58 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  59 =======
  60         /* % of full battery */
  61         info->battery_life = percentage;
  62
  63         /* We want our estimates in minutes */
  64         info->units = 0;
  65
  66         /* Extremely(!!) rough estimate, we will replace this with a datalist later on */
  67         info->time = (2 * battery);
  68
  69 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  70         info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
  71                          APM_AC_ONLINE : APM_AC_OFFLINE;
  72
  73 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  74         pgdr = ctrl_inb(SH7709_PGDR);
  75 =======
  76         pgdr = ctrl_inb(PGDR);
  77 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  78         if (pgdr & PGDR_MAIN_BATTERY_OUT) {
  79                 info->battery_status    = APM_BATTERY_STATUS_NOT_PRESENT;
  80                 info->battery_flag      = 0x80;
  81         } else if (charging < 8) {
  82                 info->battery_status    = APM_BATTERY_STATUS_CHARGING;
  83                 info->battery_flag      = 0x08;
  84 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
  85                 info->ac_line_status = 0xff;
  86 =======
  87                 info->ac_line_status    = 0x01;
  88 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
  89         } else if (percentage <= APM_CRITICAL) {
  90                 info->battery_status    = APM_BATTERY_STATUS_CRITICAL;
  91                 info->battery_flag      = 0x04;
  92         } else if (percentage <= APM_LOW) {
  93                 info->battery_status    = APM_BATTERY_STATUS_LOW;
  94                 info->battery_flag      = 0x02;
  95         } else {
  96                 info->battery_status    = APM_BATTERY_STATUS_HIGH;
  97                 info->battery_flag      = 0x01;
  98         }
  99 <<<<<<< HEAD:arch/sh/boards/hp6xx/hp6xx_apm.c
 100
 101         info->units = 0;
 102 =======
 103 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:arch/sh/boards/hp6xx/hp6xx_apm.c
 104 }
 105
 106 static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
 107 {
 108         if (!APM_DISABLED)
 109                 apm_queue_event(APM_USER_SUSPEND);
 110
 111         return IRQ_HANDLED;
 112 }
 113
 114 static int __init hp6x0_apm_init(void)
 115 {
 116         int ret;
 117
 118         ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
 119                           IRQF_DISABLED, MODNAME, NULL);
 120         if (unlikely(ret < 0)) {
 121                 printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
 122                        HP680_BTN_IRQ);
 123                 return ret;
 124         }
 125
 126         apm_get_power_status = hp6x0_apm_get_power_status;
 127
 128         return ret;
 129 }
 130
 131 static void __exit hp6x0_apm_exit(void)
 132 {
 133         free_irq(HP680_BTN_IRQ, 0);
 134 }
 135
 136 module_init(hp6x0_apm_init);
 137 module_exit(hp6x0_apm_exit);
 138
 139 MODULE_AUTHOR("Adriy Skulysh");
 140 MODULE_DESCRIPTION("hp6xx Advanced Power Management");
 141 MODULE_LICENSE("GPL");