Merge commit 'v2.6.27-rc7' into x86/debug

1 files changed, 111 insertions, 0 deletions

diff --git a/arch/sh/boards/mach-hp6xx/hp6xx_apm.c b/arch/sh/boards/mach-hp6xx/hp6xx_apm.c
new file mode 100644
index 000000000000..177f4f028e0d
--- /dev/null
+++ b/arch/sh/boards/mach-hp6xx/hp6xx_apm.c
@@ -0,0 +1,111 @@
+/*
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/apm-emulation.h>
+#include <linux/io.h>
+#include <asm/adc.h>
+#include <asm/hp6xx.h>
+
+/* percentage values */
+#define APM_CRITICAL			10
+#define APM_LOW				30
+
+/* resonably sane values */
+#define HP680_BATTERY_MAX		898
+#define HP680_BATTERY_MIN		486
+#define HP680_BATTERY_AC_ON		1023
+
+#define MODNAME "hp6x0_apm"
+
+#define PGDR	0xa400012c
+
+static void hp6x0_apm_get_power_status(struct apm_power_info *info)
+{
+	int battery, backup, charging, percentage;
+	u8 pgdr;
+
+	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);
+
+	/* % of full battery */
+	info->battery_life = percentage;
+
+	/* We want our estimates in minutes */
+	info->units = 0;
+
+	/* Extremely(!!) rough estimate, we will replace this with a datalist later on */
+	info->time = (2 * battery);
+
+	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) {
+		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) {
+		info->battery_status	= APM_BATTERY_STATUS_CRITICAL;
+		info->battery_flag	= 0x04;
+	} else if (percentage <= APM_LOW) {
+		info->battery_status	= APM_BATTERY_STATUS_LOW;
+		info->battery_flag	= 0x02;
+	} else {
+		info->battery_status	= APM_BATTERY_STATUS_HIGH;
+		info->battery_flag	= 0x01;
+	}
+}
+
+static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
+{
+	if (!APM_DISABLED)
+		apm_queue_event(APM_USER_SUSPEND);
+
+	return IRQ_HANDLED;
+}
+
+static int __init hp6x0_apm_init(void)
+{
+	int ret;
+
+	ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
+			  IRQF_DISABLED, MODNAME, NULL);
+	if (unlikely(ret < 0)) {
+		printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
+		       HP680_BTN_IRQ);
+		return ret;
+	}
+
+	apm_get_power_status = hp6x0_apm_get_power_status;
+
+	return ret;
+}
+
+static void __exit hp6x0_apm_exit(void)
+{
+	free_irq(HP680_BTN_IRQ, 0);
+}
+
+module_init(hp6x0_apm_init);
+module_exit(hp6x0_apm_exit);
+
+MODULE_AUTHOR("Adriy Skulysh");
+MODULE_DESCRIPTION("hp6xx Advanced Power Management");
+MODULE_LICENSE("GPL");