This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / boards / hp6xx / hp6xx_apm.c

diff --git a/arch/sh/boards/hp6xx/hp6xx_apm.c b/arch/sh/boards/hp6xx/hp6xx_apm.c
new file mode 100644 (file)
index 0000000..d146cda
--- /dev/null
+++ b/arch/sh/boards/hp6xx/hp6xx_apm.c
@@ -0,0 +1,122 @@
+/*
+ * bios-less APM driver for hp680
+ *
+ * Copyright 2005 (c) Andriy Skulysh <askulysh@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 <asm/adc.h>
+#include <asm/hp6xx.h>
+
+#define SH7709_PGDR                    0xa400012c
+
+#define APM_CRITICAL                   10
+#define APM_LOW                                30
+
+#define HP680_BATTERY_MAX              875
+#define HP680_BATTERY_MIN              600
+#define HP680_BATTERY_AC_ON            900
+
+#define MODNAME "hp6x0_apm"
+
+static int hp6x0_apm_get_info(char *buf, char **start, off_t fpos, int length)
+{
+       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;
+
+       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;
+
+       p = buf;
+
+       pgdr = ctrl_inb(SH7709_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;
+       } else if (percentage <= APM_CRITICAL) {
+               battery_status = APM_BATTERY_STATUS_CRITICAL;
+               battery_flag = 0x04;
+       } else if (percentage <= APM_LOW) {
+               battery_status = APM_BATTERY_STATUS_LOW;
+               battery_flag = 0x02;
+       } else {
+               battery_status = APM_BATTERY_STATUS_HIGH;
+               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)
+               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, 0);
+       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;
+
+       return ret;
+}
+
+static void __exit hp6x0_apm_exit(void)
+{
+       free_irq(HP680_BTN_IRQ, 0);
+       apm_get_info = 0;
+}
+
+module_init(hp6x0_apm_init);
+module_exit(hp6x0_apm_exit);
+
+MODULE_AUTHOR("Adriy Skulysh");
+MODULE_DESCRIPTION("hp6xx Advanced Power Management");
+MODULE_LICENSE("GPL");