* bios-less APM driver for hp680
*
* Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
+ * Copyright 2008 (c) Kristoffer Ericson <kristoffer.ericson@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License.
*/
#include <linux/module.h>
-#include <linux/apm_bios.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
-#include <asm/io.h>
-#include <asm/apm.h>
+#include <linux/apm-emulation.h>
+#include <linux/io.h>
#include <asm/adc.h>
#include <asm/hp6xx.h>
-#define SH7709_PGDR 0xa400012c
-
+/* percentage values */
#define APM_CRITICAL 10
#define APM_LOW 30
-#define HP680_BATTERY_MAX 875
-#define HP680_BATTERY_MIN 600
-#define HP680_BATTERY_AC_ON 900
+/* resonably sane values */
+#define HP680_BATTERY_MAX 898
+#define HP680_BATTERY_MIN 486
+#define HP680_BATTERY_AC_ON 1023
#define MODNAME "hp6x0_apm"
-static int hp6x0_apm_get_info(char *buf, char **start, off_t fpos, int length)
+#define PGDR 0xa400012c
+
+static void hp6x0_apm_get_power_status(struct apm_power_info *info)
{
+ int battery, backup, charging, percentage;
u8 pgdr;
- char *p;
- int battery_status;
- int battery_flag;
- int ac_line_status;
- int time_units = APM_BATTERY_LIFE_UNKNOWN;
- int battery = adc_single(ADC_CHANNEL_BATTERY);
- int backup = adc_single(ADC_CHANNEL_BACKUP);
- int charging = adc_single(ADC_CHANNEL_CHARGE);
- int percentage;
+ battery = adc_single(ADC_CHANNEL_BATTERY);
+ backup = adc_single(ADC_CHANNEL_BACKUP);
+ charging = adc_single(ADC_CHANNEL_CHARGE);
percentage = 100 * (battery - HP680_BATTERY_MIN) /
(HP680_BATTERY_MAX - HP680_BATTERY_MIN);
- ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
- APM_AC_ONLINE : APM_AC_OFFLINE;
+ /* % of full battery */
+ info->battery_life = percentage;
+
+ /* We want our estimates in minutes */
+ info->units = 0;
- p = buf;
+ /* Extremely(!!) rough estimate, we will replace this with a datalist later on */
+ info->time = (2 * battery);
- pgdr = ctrl_inb(SH7709_PGDR);
+ info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
+ APM_AC_ONLINE : APM_AC_OFFLINE;
+
+ pgdr = ctrl_inb(PGDR);
if (pgdr & PGDR_MAIN_BATTERY_OUT) {
- battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
- battery_flag = 0x80;
- percentage = -1;
- } else if (charging < 8 ) {
- battery_status = APM_BATTERY_STATUS_CHARGING;
- battery_flag = 0x08;
- ac_line_status = 0xff;
+ info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
+ info->battery_flag = 0x80;
+ } else if (charging < 8) {
+ info->battery_status = APM_BATTERY_STATUS_CHARGING;
+ info->battery_flag = 0x08;
+ info->ac_line_status = 0x01;
} else if (percentage <= APM_CRITICAL) {
- battery_status = APM_BATTERY_STATUS_CRITICAL;
- battery_flag = 0x04;
+ info->battery_status = APM_BATTERY_STATUS_CRITICAL;
+ info->battery_flag = 0x04;
} else if (percentage <= APM_LOW) {
- battery_status = APM_BATTERY_STATUS_LOW;
- battery_flag = 0x02;
+ info->battery_status = APM_BATTERY_STATUS_LOW;
+ info->battery_flag = 0x02;
} else {
- battery_status = APM_BATTERY_STATUS_HIGH;
- battery_flag = 0x01;
+ info->battery_status = APM_BATTERY_STATUS_HIGH;
+ info->battery_flag = 0x01;
}
-
- p += sprintf(p, "1.0 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
- APM_32_BIT_SUPPORT,
- ac_line_status,
- battery_status,
- battery_flag,
- percentage,
- time_units,
- "min");
- p += sprintf(p, "bat=%d backup=%d charge=%d\n",
- battery, backup, charging);
-
- return p - buf;
}
static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
{
- if (!apm_suspended)
+ if (!APM_DISABLED)
apm_queue_event(APM_USER_SUSPEND);
return IRQ_HANDLED;
int ret;
ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
- IRQF_DISABLED, MODNAME, 0);
+ IRQF_DISABLED, MODNAME, NULL);
if (unlikely(ret < 0)) {
printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
HP680_BTN_IRQ);
return ret;
}
- apm_get_info = hp6x0_apm_get_info;
+ apm_get_power_status = hp6x0_apm_get_power_status;
return ret;
}
static void __exit hp6x0_apm_exit(void)
{
free_irq(HP680_BTN_IRQ, 0);
- apm_get_info = 0;
}
module_init(hp6x0_apm_init);