From: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
This patch adds APM_EMULATION based Battery Driver, which provides
standard interface for user-space applications to manage the battery.
Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
---
.../loongson/lemote-2f/yeeloong_laptop/Kconfig | 9 ++
.../loongson/lemote-2f/yeeloong_laptop/Makefile | 1 +
.../lemote-2f/yeeloong_laptop/yl_battery.c | 127 ++++++++++++++++++++
3 files changed, 137 insertions(+), 0 deletions(-)
create mode 100644 arch/mips/loongson/lemote-2f/yeeloong_laptop/yl_battery.c
diff --git a/arch/mips/loongson/lemote-2f/yeeloong_laptop/Kconfig b/arch/mips/loongson/lemote-2f/yeeloong_laptop/Kconfig
index 02d36d8..2401ed6 100644
--- a/arch/mips/loongson/lemote-2f/yeeloong_laptop/Kconfig
+++ b/arch/mips/loongson/lemote-2f/yeeloong_laptop/Kconfig
@@ -1,6 +1,7 @@
menuconfig LEMOTE_YEELOONG2F
bool "Lemote YeeLoong Laptop"
depends on LEMOTE_MACH2F
+ select SYS_SUPPORTS_APM_EMULATION
default y
help
YeeLoong netbook is a mini laptop made by Lemote, which is basically
@@ -19,4 +20,12 @@ config YEELOONG_BACKLIGHT
interface for user-space applications to control the brightness of
the backlight.
+config YEELOONG_BATTERY
+ tristate "Battery Driver"
+ depends on APM_EMULATION
+ default y
+ help
+ This option adds APM emulated Battery Driver, which provides standard
+ interface for user-space applications to manage the battery.
+
endif
diff --git a/arch/mips/loongson/lemote-2f/yeeloong_laptop/Makefile b/arch/mips/loongson/lemote-2f/yeeloong_laptop/Makefile
index 6c3d3dc..31e2145 100644
--- a/arch/mips/loongson/lemote-2f/yeeloong_laptop/Makefile
+++ b/arch/mips/loongson/lemote-2f/yeeloong_laptop/Makefile
@@ -3,3 +3,4 @@
obj-y += ec_kb3310b.o
obj-$(CONFIG_YEELOONG_BACKLIGHT) += yl_backlight.o
+obj-$(CONFIG_YEELOONG_BATTERY) += yl_battery.o
diff --git a/arch/mips/loongson/lemote-2f/yeeloong_laptop/yl_battery.c b/arch/mips/loongson/lemote-2f/yeeloong_laptop/yl_battery.c
new file mode 100644
index 0000000..2a94292
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/yeeloong_laptop/yl_battery.c
@@ -0,0 +1,127 @@
+/*
+ * YeeLoong Battery Driver: APM emulated support
+ *
+ * Copyright (C) 2009 Lemote Inc.
+ * Author: Liu Junliang <liujl@xxxxxxxxxx>
+ * Wu Zhangjin <wuzj@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/apm-emulation.h>
+#include <linux/err.h>
+#include <linux/module.h>
+
+#include <asm/bootinfo.h>
+
+#include "ec_kb3310b.h"
+
+MODULE_AUTHOR("Liu Junliang <liujl@xxxxxxxxxx>; Wu Zhangjin <wuzj@xxxxxxxxxx>");
+MODULE_DESCRIPTION("YeeLoong laptop battery driver");
+MODULE_LICENSE("GPL");
+
+static void get_fixed_battery_info(void)
+{
+ int design_cap, full_charged_cap, design_vol, vendor, cell_count;
+
+ design_cap = (ec_read(REG_BAT_DESIGN_CAP_HIGH) << 8)
+ | ec_read(REG_BAT_DESIGN_CAP_LOW);
+ full_charged_cap = (ec_read(REG_BAT_FULLCHG_CAP_HIGH) << 8)
+ | ec_read(REG_BAT_FULLCHG_CAP_LOW);
+ design_vol = (ec_read(REG_BAT_DESIGN_VOL_HIGH) << 8)
+ | ec_read(REG_BAT_DESIGN_VOL_LOW);
+ vendor = ec_read(REG_BAT_VENDOR);
+ cell_count = ec_read(REG_BAT_CELL_COUNT);
+
+ if (vendor != 0) {
+ pr_info("battery vendor(%s), cells count(%d), "
+ "with designed capacity(%d),designed voltage(%d),"
+ " full charged capacity(%d)\n",
+ (vendor ==
+ FLAG_BAT_VENDOR_SANYO) ? "SANYO" : "SIMPLO",
+ (cell_count == FLAG_BAT_CELL_3S1P) ? 3 : 6,
+ design_cap, design_vol,
+ full_charged_cap);
+ }
+}
+
+#define APM_CRITICAL 5
+
+static void get_power_status(struct apm_power_info *info)
+{
+ unsigned char bat_status;
+
+ info->battery_status = APM_BATTERY_STATUS_UNKNOWN;
+ info->battery_flag = APM_BATTERY_FLAG_UNKNOWN;
+ info->units = APM_UNITS_MINS;
+
+ info->battery_life = (ec_read(REG_BAT_RELATIVE_CAP_HIGH) << 8) |
+ (ec_read(REG_BAT_RELATIVE_CAP_LOW));
+
+ info->ac_line_status = (ec_read(REG_BAT_POWER) & BIT_BAT_POWER_ACIN) ?
+ APM_AC_ONLINE : APM_AC_OFFLINE;
+
+ bat_status = ec_read(REG_BAT_STATUS);
+
+ if (!(bat_status & BIT_BAT_STATUS_IN)) {
+ /* no battery inserted */
+ info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
+ info->battery_flag = APM_BATTERY_FLAG_NOT_PRESENT;
+ info->time = 0x00;
+ return;
+ }
+
+ /* adapter inserted */
+ if (info->ac_line_status == APM_AC_ONLINE) {
+ if (!(bat_status & BIT_BAT_STATUS_FULL)) {
+ /* battery is not fully charged */
+ info->battery_status = APM_BATTERY_STATUS_CHARGING;
+ info->battery_flag = APM_BATTERY_FLAG_CHARGING;
+ } else {
+ /* battery is fully charged */
+ info->battery_status = APM_BATTERY_STATUS_HIGH;
+ info->battery_flag = APM_BATTERY_FLAG_HIGH;
+ info->battery_life = 100;
+ }
+ } else {
+ /* battery is too low */
+ if (bat_status & BIT_BAT_STATUS_LOW) {
+ info->battery_status = APM_BATTERY_STATUS_LOW;
+ info->battery_flag = APM_BATTERY_FLAG_LOW;
+ if (info->battery_life <= APM_CRITICAL) {
+ /* we should power off the system now */
+ info->battery_status =
+ APM_BATTERY_STATUS_CRITICAL;
+ info->battery_flag = APM_BATTERY_FLAG_CRITICAL;
+ }
+ } else {
+ /* assume the battery is high enough. */
+ info->battery_status = APM_BATTERY_STATUS_HIGH;
+ info->battery_flag = APM_BATTERY_FLAG_HIGH;
+ }
+ }
+ info->time = ((info->battery_life - 3) * 54 + 142) / 60;
+}
+
+static int __init yeeloong_battery_init(void)
+{
+ if (mips_machtype != MACH_LEMOTE_YL2F89) {
+ pr_err("This Driver is only for YeeLoong laptop\n");
+ return -EFAULT;
+ }
+
+ get_fixed_battery_info();
+
+ apm_get_power_status = get_power_status;
+
+ return 0;
+}
+
+static void __exit yeeloong_battery_exit(void)
+{
+}
+
+module_init(yeeloong_battery_init);
+module_exit(yeeloong_battery_exit);
--
1.6.2.1
