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Commit ec614d80 authored by Wu Zhangjin's avatar Wu Zhangjin Committed by Ralf Baechle
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MIPS: Yeeloong 2F: Add basic EC operations 



YeeLoong2F has a KB3310b embedded controller. Add basic operations for
future related drivers and board support.

Signed-off-by: default avatarWu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/684/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 599a8945

arch/mips/loongson/lemote-2f/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/mips/loongson/lemote-2f/ec_kb3310b.c

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/*

 * Basic KB3310B Embedded Controller support for the YeeLoong 2F netbook

 *

 *  Copyright (C) 2008 Lemote Inc.

 *  Author: liujl <liujl@lemote.com>, 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/spinlock.h>

#include <linux/delay.h>



#include "ec_kb3310b.h"



static DEFINE_SPINLOCK(index_access_lock);

static DEFINE_SPINLOCK(port_access_lock);



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);



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 writes and corresponding status queries.

 */

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);



/*

 * Send 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) {

		pr_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);

arch/mips/loongson/lemote-2f/ec_kb3310b.h

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/*

 * KB3310B Embedded Controller

 *

 *  Copyright (C) 2008 Lemote Inc.

 *  Author: liujl <liujl@lemote.com>, 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);



typedef int (*sci_handler) (int status);

extern sci_handler yeeloong_report_lid_status;



#define SCI_IRQ_NUM 0x0A



/*

 * 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 is 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



/* temperature & fan registers */

#define	REG_TEMPERATURE_VALUE	0xF458

#define	REG_FAN_AUTO_MAN_SWITCH 0xF459

#define	BIT_FAN_AUTO		0

#define	BIT_FAN_MANUAL		1

#define	REG_FAN_CONTROL		0xF4D2

#define	BIT_FAN_CONTROL_ON	(1 << 0)

#define	BIT_FAN_CONTROL_OFF	(0 << 0)

#define	REG_FAN_STATUS		0xF4DA

#define	BIT_FAN_STATUS_ON	(1 << 0)

#define	BIT_FAN_STATUS_OFF	(0 << 0)

#define	REG_FAN_SPEED_HIGH	0xFE22

#define	REG_FAN_SPEED_LOW	0xFE23

#define	REG_FAN_SPEED_LEVEL	0xF4CC

/* fan speed divider */

#define	FAN_SPEED_DIVIDER	480000	/* (60*1000*1000/62.5/2)*/



/* battery registers */

#define	REG_BAT_DESIGN_CAP_HIGH		0xF77D

#define	REG_BAT_DESIGN_CAP_LOW		0xF77E

#define	REG_BAT_FULLCHG_CAP_HIGH	0xF780

#define	REG_BAT_FULLCHG_CAP_LOW		0xF781

#define	REG_BAT_DESIGN_VOL_HIGH		0xF782

#define	REG_BAT_DESIGN_VOL_LOW		0xF783

#define	REG_BAT_CURRENT_HIGH		0xF784

#define	REG_BAT_CURRENT_LOW		0xF785

#define	REG_BAT_VOLTAGE_HIGH		0xF786

#define	REG_BAT_VOLTAGE_LOW		0xF787

#define	REG_BAT_TEMPERATURE_HIGH	0xF788

#define	REG_BAT_TEMPERATURE_LOW		0xF789

#define	REG_BAT_RELATIVE_CAP_HIGH	0xF492

#define	REG_BAT_RELATIVE_CAP_LOW	0xF493

#define	REG_BAT_VENDOR			0xF4C4

#define	FLAG_BAT_VENDOR_SANYO		0x01

#define	FLAG_BAT_VENDOR_SIMPLO		0x02

#define	REG_BAT_CELL_COUNT		0xF4C6

#define	FLAG_BAT_CELL_3S1P		0x03

#define	FLAG_BAT_CELL_3S2P		0x06

#define	REG_BAT_CHARGE			0xF4A2

#define	FLAG_BAT_CHARGE_DISCHARGE	0x01

#define	FLAG_BAT_CHARGE_CHARGE		0x02

#define	FLAG_BAT_CHARGE_ACPOWER		0x00

#define	REG_BAT_STATUS			0xF4B0

#define	BIT_BAT_STATUS_LOW		(1 << 5)

#define	BIT_BAT_STATUS_DESTROY		(1 << 2)

#define	BIT_BAT_STATUS_FULL		(1 << 1)

#define	BIT_BAT_STATUS_IN		(1 << 0)

#define	REG_BAT_CHARGE_STATUS		0xF4B1

#define	BIT_BAT_CHARGE_STATUS_OVERTEMP	(1 << 2)

#define	BIT_BAT_CHARGE_STATUS_PRECHG	(1 << 1)

#define	REG_BAT_STATE			0xF482

#define	BIT_BAT_STATE_CHARGING		(1 << 1)

#define	BIT_BAT_STATE_DISCHARGING	(1 << 0)

#define	REG_BAT_POWER			0xF440

#define	BIT_BAT_POWER_S3		(1 << 2)

#define	BIT_BAT_POWER_ON		(1 << 1)

#define	BIT_BAT_POWER_ACIN		(1 << 0)



/* other registers */

/* Audio: rd/wr */

#define	REG_AUDIO_VOLUME	0xF46C

#define	REG_AUDIO_MUTE		0xF4E7

#define	REG_AUDIO_BEEP		0xF4D0

/* USB port power or not: rd/wr */

#define	REG_USB0_FLAG		0xF461

#define	REG_USB1_FLAG		0xF462

#define	REG_USB2_FLAG		0xF463

#define	BIT_USB_FLAG_ON		1

#define	BIT_USB_FLAG_OFF	0

/* LID */

#define	REG_LID_DETECT		0xF4BD

#define	BIT_LID_DETECT_ON	1

#define	BIT_LID_DETECT_OFF	0

/* CRT */

#define	REG_CRT_DETECT		0xF4AD

#define	BIT_CRT_DETECT_PLUG	1

#define	BIT_CRT_DETECT_UNPLUG	0

/* LCD backlight brightness adjust: 9 levels */

#define	REG_DISPLAY_BRIGHTNESS	0xF4F5

/* Black screen Status */

#define	BIT_DISPLAY_LCD_ON	1

#define	BIT_DISPLAY_LCD_OFF	0

/* LCD backlight control: off/restore */

#define	REG_BACKLIGHT_CTRL	0xF7BD

#define	BIT_BACKLIGHT_ON	1

#define	BIT_BACKLIGHT_OFF	0

/* Reset the machine auto-clear: rd/wr */

#define	REG_RESET		0xF4EC

#define	BIT_RESET_ON		1

/* Light the led: rd/wr */

#define	REG_LED			0xF4C8

#define	BIT_LED_RED_POWER	(1 << 0)

#define	BIT_LED_ORANGE_POWER	(1 << 1)

#define	BIT_LED_GREEN_CHARGE	(1 << 2)

#define	BIT_LED_RED_CHARGE	(1 << 3)

#define	BIT_LED_NUMLOCK		(1 << 4)

/* Test led mode, all led on/off */

#define	REG_LED_TEST		0xF4C2

#define	BIT_LED_TEST_IN		1

#define	BIT_LED_TEST_OUT	0

/* Camera on/off */

#define	REG_CAMERA_STATUS	0xF46A

#define	BIT_CAMERA_STATUS_ON	1

#define	BIT_CAMERA_STATUS_OFF	0

#define	REG_CAMERA_CONTROL	0xF7B7

#define	BIT_CAMERA_CONTROL_OFF	0

#define	BIT_CAMERA_CONTROL_ON	1

/* Wlan Status */

#define	REG_WLAN		0xF4FA

#define	BIT_WLAN_ON		1

#define	BIT_WLAN_OFF		0

#define	REG_DISPLAY_LCD		0xF79F



/* SCI Event Number from EC */

enum {

	EVENT_LID = 0x23,	/*  LID open/close */

	EVENT_DISPLAY_TOGGLE,	/*  Fn+F3 for display switch */

	EVENT_SLEEP,		/*  Fn+F1 for entering sleep mode */

	EVENT_OVERTEMP,		/*  Over-temperature happened */

	EVENT_CRT_DETECT,	/*  CRT is connected */

	EVENT_CAMERA,		/*  Camera on/off */

	EVENT_USB_OC2,		/*  USB2 Over Current occurred */

	EVENT_USB_OC0,		/*  USB0 Over Current occurred */

	EVENT_BLACK_SCREEN,	/*  Turn on/off backlight */

	EVENT_AUDIO_MUTE,	/*  Mute on/off */

	EVENT_DISPLAY_BRIGHTNESS,/* LCD backlight brightness adjust */

	EVENT_AC_BAT,		/*  AC & Battery relative issue */

	EVENT_AUDIO_VOLUME,	/*  Volume adjust */

	EVENT_WLAN,		/*  Wlan on/off */

	EVENT_END

};



#endif /* !_EC_KB3310B_H */