YeeLoong2F has a kb3310b Embedded Controller. This patch add the basic
EC operations for future relative drivers or board support.
Signed-off-by: Wu Zhangjin <wuzhangjin@xxxxxxxxx>
---
arch/mips/loongson/lemote-2f/Makefile | 2 +-
arch/mips/loongson/lemote-2f/ec_kb3310b.c | 132 +++++++++++++++++++++++++++++
arch/mips/loongson/lemote-2f/ec_kb3310b.h | 47 ++++++++++
3 files changed, 180 insertions(+), 1 deletions(-)
create mode 100644 arch/mips/loongson/lemote-2f/ec_kb3310b.c
create mode 100644 arch/mips/loongson/lemote-2f/ec_kb3310b.h
diff --git a/arch/mips/loongson/lemote-2f/Makefile b/arch/mips/loongson/lemote-2f/Makefile
index 5add7b2..4d84b27 100644
--- a/arch/mips/loongson/lemote-2f/Makefile
+++ b/arch/mips/loongson/lemote-2f/Makefile
@@ -2,7 +2,7 @@
# Makefile for lemote loongson2f family machines
#
-obj-y += irq.o reset.o
+obj-y += irq.o reset.o ec_kb3310b.o
#
# Suspend Support
diff --git a/arch/mips/loongson/lemote-2f/ec_kb3310b.c b/arch/mips/loongson/lemote-2f/ec_kb3310b.c
new file mode 100644
index 0000000..1ca38a8
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/ec_kb3310b.c
@@ -0,0 +1,132 @@
+/*
+ * EC(Embedded Controller) KB3310B basic support for YeeLoong2F netbook
+ *
+ * Copyright (C) 2008 Lemote Inc.
+ * Author: liujl <liujl@xxxxxxxxxx>, 2008-04-20
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include "ec_kb3310b.h"
+
+/* this spinlock is dedicated for ec_read & ec_write function */
+DEFINE_SPINLOCK(index_access_lock);
+/* this spinlock is dedicated for 62&66 ports access */
+DEFINE_SPINLOCK(port_access_lock);
+
+/* read a byte from EC registers throught index-io */
+unsigned char ec_read(unsigned short addr)
+{
+ unsigned char value;
+ unsigned long flags;
+
+ spin_lock_irqsave(&index_access_lock, flags);
+ outb((addr & 0xff00) >> 8, EC_IO_PORT_HIGH);
+ outb((addr & 0x00ff), EC_IO_PORT_LOW);
+ value = inb(EC_IO_PORT_DATA);
+ spin_unlock_irqrestore(&index_access_lock, flags);
+
+ return value;
+}
+EXPORT_SYMBOL_GPL(ec_read);
+
+/* write a byte to EC registers throught index-io */
+void ec_write(unsigned short addr, unsigned char val)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&index_access_lock, flags);
+ outb((addr & 0xff00) >> 8, EC_IO_PORT_HIGH);
+ outb((addr & 0x00ff), EC_IO_PORT_LOW);
+ outb(val, EC_IO_PORT_DATA);
+ /* flush the write action */
+ inb(EC_IO_PORT_DATA);
+ spin_unlock_irqrestore(&index_access_lock, flags);
+
+ return;
+}
+EXPORT_SYMBOL_GPL(ec_write);
+
+/*
+ * this function is used for ec command writing and corresponding status query
+ */
+int ec_query_seq(unsigned char cmd)
+{
+ int timeout;
+ unsigned char status;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&port_access_lock, flags);
+
+ /* make chip goto reset mode */
+ udelay(EC_REG_DELAY);
+ outb(cmd, EC_CMD_PORT);
+ udelay(EC_REG_DELAY);
+
+ /* check if the command is received by ec */
+ timeout = EC_CMD_TIMEOUT;
+ status = inb(EC_STS_PORT);
+ while (timeout-- && (status & (1 << 1))) {
+ status = inb(EC_STS_PORT);
+ udelay(EC_REG_DELAY);
+ }
+
+ if (timeout <= 0) {
+ printk(KERN_ERR "%s: deadable error : timeout...\n", __func__);
+ ret = -EINVAL;
+ } else
+ printk(KERN_INFO
+ "(%x/%d)ec issued command %d status : 0x%x\n",
+ timeout, EC_CMD_TIMEOUT - timeout, cmd, status);
+
+ spin_unlock_irqrestore(&port_access_lock, flags);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ec_query_seq);
+
+/*
+ * using query command to ec to get the proper event number
+ */
+int ec_query_event_num(void)
+{
+ return ec_query_seq(CMD_GET_EVENT_NUM);
+}
+EXPORT_SYMBOL(ec_query_event_num);
+
+/*
+ * get event number from ec
+ *
+ * NOTE : this routine must follow the query_event_num function in the
+ * interrupt
+ */
+int ec_get_event_num(void)
+{
+ int timeout = 100;
+ unsigned char value;
+ unsigned char status;
+
+ udelay(EC_REG_DELAY);
+ status = inb(EC_STS_PORT);
+ udelay(EC_REG_DELAY);
+ while (timeout-- && !(status & (1 << 0))) {
+ status = inb(EC_STS_PORT);
+ udelay(EC_REG_DELAY);
+ }
+ if (timeout <= 0) {
+ printk(KERN_INFO "%s: get event number timeout.\n", __func__);
+ return -EINVAL;
+ }
+ value = inb(EC_DAT_PORT);
+ udelay(EC_REG_DELAY);
+
+ return value;
+}
+EXPORT_SYMBOL(ec_get_event_num);
diff --git a/arch/mips/loongson/lemote-2f/ec_kb3310b.h b/arch/mips/loongson/lemote-2f/ec_kb3310b.h
new file mode 100644
index 0000000..a7ce275
--- /dev/null
+++ b/arch/mips/loongson/lemote-2f/ec_kb3310b.h
@@ -0,0 +1,47 @@
+/*
+ * EC(Embedded Controller) KB3310B header file
+ *
+ * Copyright (C) 2008 Lemote Inc.
+ * Author: liujl <liujl@xxxxxxxxxx>, 2008-03-14
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _EC_KB3310B_H
+#define _EC_KB3310B_H
+
+extern unsigned char ec_read(unsigned short addr);
+extern void ec_write(unsigned short addr, unsigned char val);
+extern int ec_query_seq(unsigned char cmd);
+extern int ec_query_event_num(void);
+extern int ec_get_event_num(void);
+
+/*
+ * The following registers are determined by the EC index configuration.
+ * 1, fill the PORT_HIGH as EC register high part.
+ * 2, fill the PORT_LOW as EC register low part.
+ * 3, fill the PORT_DATA as EC register write data or get the data from it.
+ */
+#define EC_IO_PORT_HIGH 0x0381
+#define EC_IO_PORT_LOW 0x0382
+#define EC_IO_PORT_DATA 0x0383
+
+/* ec delay time 500us for register and status access */
+#define EC_REG_DELAY 500 /* unit : us */
+#define EC_CMD_TIMEOUT 0x1000
+
+/* EC access port for sci communication */
+#define EC_CMD_PORT 0x66
+#define EC_STS_PORT 0x66
+#define EC_DAT_PORT 0x62
+#define CMD_INIT_IDLE_MODE 0xdd
+#define CMD_EXIT_IDLE_MODE 0xdf
+#define CMD_INIT_RESET_MODE 0xd8
+#define CMD_REBOOT_SYSTEM 0x8c
+#define CMD_GET_EVENT_NUM 0x84
+#define CMD_PROGRAM_PIECE 0xda
+
+#endif /* !_EC_KB3310B_H */
--
1.6.2.1
