/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2009 coresystems GmbH
 *
 * 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; version 2 of
 * the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 * MA 02110-1301 USA
 */

#include <types.h>
#include <stdlib.h>
#include <console/console.h>
#include <arch/io.h>
#include <delay.h>

#include <ec/acpi/ec.h>
#include "m3885.h"

#define TH0LOW	80
#define TH0HIGH	85
#define TH0CRIT	120
#define TH1LOW	75
#define TH1HIGH	80

static u8 variables[] = {
     /* Offs,  AND,   OR */
	0x08, 0x48, 0x6C,  // Keyboard ScanCode Set & LED Data (kState1)
	0x0a, 0x01, 0x00,  // Keyboard Shift flags (kState3)
	0x0c, 0x80, 0x08,  // Keyboard State flags (kState5)
	0x11, 0xff, 0x06,  // Make/Break Debounce #'s (debounce)
	0x13, 0xff, 0x00,  // HotKey1 ScanCode (hotKey1)
	0x14, 0xff, 0x00,  // HotKey2 ScanCode (hotKey2)
	0x15, 0xff, 0x3f,  // HotKey3 ScanCode (hotKey3)
	0x16, 0xff, 0x00,  // HotKey4 ScanCode (hotKey4)
	0x17, 0xff, 0x00,  // HotKey5 ScanCode (hotKey5)
	0x18, 0xff, 0x0e,  // HotKey6 ScanCode (hotKey6)
	0x19, 0xff, 0x9f,  // HotKey1 Task = c5 Command Data (keyTsk1)
	0x1a, 0xff, 0x9f,  // HotKey2 Task = c5 Command Data (keyTsk2)
	0x1b, 0xff, 0x6a,  // HotKey3 Task = c5 Command Data (keyTsk3)
	0x1c, 0xff, 0x9f,  // HotKey4 Task = c5 Command Data (keyTsk4)
	0x1d, 0xff, 0x9f,  // HotKey5 Task = c5 Command Data (keyTsk5)
	0x1e, 0xff, 0x87,  // FuncKey Task = c5 Command Data (funcTsk)
	0x1f, 0xff, 0x9f,  // Delayed Task = c5 Command Data (dlyTsk1)
	0x20, 0xff, 0x9f,  // Wake-Up Task = c5 Command Data (wakeTsk)
	//
	0x21, 0xff, 0x08,  // WigglePin Pulse Width * 2.4ms (tmPulse)
	0x24, 0xff, 0x30,  // Keyboard State Flags (kState7)
	//
	0x2b, 0xff, 0x00,  //
	0x2c, 0xff, 0x80,  // Set Fn-Key 8
	0x2d, 0xff, 0x02,  // Set Fn-Key 9
	0x2e, 0xff, 0x00,  // Set Fn-Key 1-8 task  (0 = SMI)
	0x2f, 0xff, 0x00,  // Set Fn-Key 9-12 task (1 = SCI)
};

static u8 matrix[] = {
	0xc1,0xc0,0xd8,0xdb,0xbf,0x05,0x76,0xbf,  // (0x00-0x07)
	0xbf,0x80,0x78,0xbf,0xbf,0x07,0x88,0xc2,  // (0x08-0x0f)
	0x03,0x09,0xd9,0x16,0xbf,0x06,0x0e,0x81,  // (0x10-0x17)
	0xbf,0xbf,0xee,0xbf,0xbf,0x55,0x9a,0x89,  // (0x18-0x1f)
	0x1e,0x15,0x36,0xda,0xe8,0xbf,0x0d,0xbf,  // (0x20-0x27)
	0xbf,0xbf,0xbf,0xa3,0xbf,0x4e,0x66,0x8b,  // (0x28-0x2f)
	0x1d,0x2e,0xe6,0xe7,0xe5,0x1c,0x58,0xbf,  // (0x30-0x37)
	0x82,0xbf,0xf0,0xbf,0xbf,0x5b,0x5d,0x8c,  // (0x38-0x3f)
	0x22,0x25,0x2c,0x35,0xe1,0x1a,0x96,0xbf,  // (0x40-0x47)
	0xbf,0xbf,0xec,0xbf,0xbf,0x54,0xf1,0x8f,  // (0x48-0x4f)
	0x1b,0x2a,0x2b,0x32,0xe9,0x31,0x29,0x61,  // (0x50-0x57)
	0xbf,0xbf,0x8d,0xbf,0x86,0xc3,0x92,0x93,  // (0x58-0x5f)
	0x21,0x23,0x34,0x33,0x41,0xe0,0xbf,0xbf,  // (0x60-0x67)
	0xbf,0x85,0xeb,0xbf,0xb6,0xbf,0x91,0xbf,  // (0x68-0x6f)
	0x26,0x24,0x2d,0xe3,0xe2,0xe4,0xbf,0xbf,  // (0x70-0x77)
	0x87,0xbf,0xea,0xbf,0xbf,0x52,0x90,0x8e,  // (0x78-0x7f)
};

static u8 function_ram[] = {
	0x04,0xbd,0x0c,0xbe,0x7e,0x9a,0x8a,0xb6,  // (0xc0-0xc3)
	0x92,0x8f,0x93,0x8e,0x81,0x86,0x82,0x87,  // (0xc4-0xc7)
	0x8a,0x9a,0x8d,0x7e,0x88,0x84,0x7e,0x78,  // (0xc8-0xcb)
	0x77,0x07,0x77,0x98,0x89,0xb2,0x05,0x9b,  // (0xcc-0xcf)
	0x78,0x84,0x07,0x88,0x8a,0x7e,0x05,0xa6,  // (0xd0-0xd3)
	0x06,0xa7,0x04,0xa8,0x0c,0xa9,0x03,0xaa,  // (0xd4-0xd7)
	0x0b,0xc1,0x83,0xc0,0x0a,0xad,0x01,0xae,  // (0xd8-0xdb)
	0x09,0xaf,0x78,0xb0,0x07,0xb1,0x1a,0x61,  // (0xdc-0xdf)
	0x3b,0x69,0x42,0x72,0x4b,0x7a,0x3c,0x6b,  // (0xe0-0xe3)
	0x43,0x73,0x44,0x74,0x3d,0x6c,0x3e,0x75,  // (0xe4-0xe7)
	0x46,0x7d,0x3a,0x70,0x49,0x71,0x4a,0x94,  // (0xe8-0xeb)
	0x4c,0x79,0x4c,0x7c,0x45,0x7c,0x45,0x79,  // (0xec-0xef)
	0x4d,0x7b,0x5a,0x95,0x4c,0x7b,0x45,0x7b,  // (0xf0-0xf3)
	0x4d,0x79,0x4d,0x7c,0x4e,0x7b,0x54,0x95,  // (0xf4-0xf7)
	0x52,0x7c,0x45,0x94,0x4a,0x79,0xb3,0x95,  // (0xf8-0xfb)
	0xb4,0x7b,0xb5,0x7c,0x00,0x00,0x55,0x79,  // (0xfc-0xff)
};


#define KBD_DATA	0x60
#define KBD_SC		0x64

#define   KBD_IBF	(1 << 1) // 1: input buffer full (data ready for ec)
#define   KBD_OBF	(1 << 0) // 1: output buffer full (data ready for host)

static int send_kbd_command(u8 command)
{
	int timeout;

	timeout = 0x7ff;
	while ((inb(KBD_SC) & KBD_IBF) && --timeout) {
		udelay(10);
		if ((timeout & 0xff) == 0)
			printk(BIOS_SPEW, ".");
	}
	if (!timeout) {
		printk(BIOS_DEBUG, "Timeout while sending command 0x%02x to EC!\n",
				command);
		// return -1;
	}

	outb(command, KBD_SC);
	return 0;
}

static int send_kbd_data(u8 data)
{
	int timeout;

	timeout = 0x7ff;
	while ((inb(KBD_SC) & KBD_IBF) && --timeout) { // wait for IBF = 0
		udelay(10);
		if ((timeout & 0xff) == 0)
			printk(BIOS_SPEW, ".");
	}
	if (!timeout) {
		printk(BIOS_DEBUG, "Timeout while sending data 0x%02x to EC!\n",
				data);
		// return -1;
	}

	outb(data, KBD_DATA);

	return 0;
}


static u8 recv_kbd_data(void)
{
	int timeout;
	u8 data;

	timeout = 0x7fff;
	while (--timeout) { // Wait for OBF = 1
		if (inb(KBD_SC) & KBD_OBF) {
			break;
		}
		udelay(10);
		if ((timeout & 0xff) == 0)
			printk(BIOS_SPEW, ".");
	}
	if (!timeout) {
		printk(BIOS_DEBUG, "\nTimeout while receiving data from EC!\n");
		// return -1;
	}

	data = inb(KBD_DATA);

	return data;
}


static u8 m3885_get_variable(u8 index)
{
	u8 ret;

	send_kbd_command(0xb8);
	send_kbd_data(index);
	send_kbd_command(0xbc);
	send_kbd_command(0xff);
	ret = recv_kbd_data();
	printk(BIOS_SPEW, "m3885: get variable %02x = %02x\n", index, ret);
	return ret;
}

static void m3885_set_variable(u8 index, u8 data)
{
	printk(BIOS_SPEW, "m3885: set variable %02x = %02x\n", index, data);
	send_kbd_command(0xb8);
	send_kbd_data(index);
	send_kbd_command(0xbd);
	send_kbd_data(data);
}

static void m3885_set_proc_ram(u8 index, u8 data)
{
	printk(BIOS_SPEW, "m3885: set procram %02x = %02x\n", index, data);
	send_kbd_command(0xb8);
	send_kbd_data(index);
	send_kbd_command(0xbb);
	send_kbd_data(data);
}

static u8 m3885_get_proc_ram(u8 index)
{
	u8 ret;

	send_kbd_command(0xb8);
	send_kbd_data(index);
	send_kbd_command(0xba);
	// send_kbd_command(0xff);
	ret = recv_kbd_data();
	printk(BIOS_SPEW, "m3885: get procram %02x = %02x\n", index, ret);
	return ret;
}

static u8 m3885_read_port(void)
{
	u8 reg8;

	reg8 = m3885_get_variable(0x0c);
	reg8 &= ~(7 << 4);
	reg8 |= (4 << 4);	// bank 4
	m3885_set_variable(0x0c, reg8);

	/* P6YSTATE */
	return m3885_get_proc_ram(0xf8);
}

void m3885_configure_multikey(void)
{
	int i;
	u8 reg8;
	u8 kstate5_flags, offs, maxvars;

	/* ram bank 0 */
	kstate5_flags = m3885_get_variable(0x0c);
	m3885_set_variable(0x0c, kstate5_flags & ~(7 << 4));

	/* Write Matrix to bank 0 */
	for (i=0; i < ARRAY_SIZE(matrix); i++) {
		m3885_set_proc_ram(i + 0x80, matrix[i]);
	}


	/* ram bank 2 */
	m3885_set_variable(0x0c, (kstate5_flags & (~(7 << 4))) | (2 << 4));

	/* Get the number of variables */
	maxvars = m3885_get_variable(0x00);
	printk(BIOS_DEBUG, "M388x has %d variables in bank 2.\n", maxvars);
	if (maxvars >= 35) {
		offs = m3885_get_variable(0x23);
		if ((offs > 0xc0) || (offs < 0x80)) {
			printk(BIOS_DEBUG, "M388x does not have a valid ram offset (0x%x)\n", offs);
		} else {
			printk(BIOS_DEBUG, "Writing Fn-Table to M388x RAM offset 0x%x\n", offs);
			for (i=0; i < ARRAY_SIZE(function_ram); i++) {
				m3885_set_proc_ram(i + offs, function_ram[i]);
			}
		}
	} else {
		printk(BIOS_DEBUG, "Could not load Function-RAM (%d).\n", maxvars);
	}

	// restore original bank
	m3885_set_variable(0x0c, kstate5_flags);
	maxvars = m3885_get_variable(0x00);
	printk(BIOS_DEBUG, "M388x has %d variables in original bank.\n", maxvars);
	for (i=0; i<ARRAY_SIZE(variables); i+=3) {
		if(variables[i + 0] > maxvars)
			continue;
		reg8 = m3885_get_variable(variables[i + 0]);
		reg8 &= ~(variables[i + 1]);
		reg8 |= variables[i + 2]; //  & ~variables[i + 1];
		m3885_set_variable(variables[i + 0], reg8);
	}

	/* OEM Init */

	/* Set Bank 1 */
	m3885_set_variable(0x0c, (kstate5_flags & ~(7 << 4)) | (1 << 4));

	/* Set SMI# at P5.1 */
	/* SMI Control -> p5.1 = EXTSMI# */
	m3885_set_proc_ram(0xff, 0xc1);

	/* Set Fn-Key Task 0 -> SMI#/SCI */
	m3885_set_proc_ram(0x6d, 0x81);

	/* Set Fn-Key Task 1 -> SCI */
	m3885_set_proc_ram(0x6c, 0x80);

	/* Number of Thermal Sensors */
	m3885_set_proc_ram(0xf2, 0x02);

	/* Critical Task */
	m3885_set_proc_ram(0xf3, 0x5d);

	/* Thermal Polling Period */
	m3885_set_proc_ram(0xf9, 0x0a);

	/* ReadPort */
	// m3885_set_variable(0x0c, (kstate5_flags & ~(7 << 4)) | (4 << 4));

	/* AC PRESN# */
	if (m3885_read_port() & (1 << 0))
		reg8 = 0x8a;
	else
		reg8 = 0x9a;
	m3885_set_proc_ram(0xd0, reg8); // P60SPEC

	/* SENSE1# */
	if (m3885_read_port() & (1 << 2))
		reg8 = 0x8a;
	else
		reg8 = 0x9a;
	m3885_set_proc_ram(0xd2, reg8); // P62SPEC

	/* SENSE2# */
	if (m3885_read_port() & (1 << 3))
		reg8 = 0x8a;
	else
		reg8 = 0x9a;
	m3885_set_proc_ram(0xd3, reg8); // P63SPEC

	/* Low Active Port */
	m3885_set_proc_ram(0xd1, 0x88); // P61SPEC
	m3885_set_proc_ram(0xd6, 0x88); // P66SPEC
	m3885_set_proc_ram(0xd7, 0x88); // P67SPEC

	/* High Active Port */
	m3885_set_proc_ram(0xd4, 0x98); // P64SPEC
	m3885_set_proc_ram(0xd5, 0x98); // P65SPEC

	/* Set P60TASK-P67TASK */
	/* SCI */
	m3885_set_proc_ram(0xda, 0x80); // P62TASK SENSE1#
	m3885_set_proc_ram(0xdb, 0x80); // P63TASK SENSE2#
	m3885_set_proc_ram(0xdd, 0x80); // P65TASK PROCHOT
	m3885_set_proc_ram(0xde, 0x80); // P65TASK THERMTRIP#
	m3885_set_proc_ram(0xdf, 0x80); // P65TASK PME#
	/* SMI/SCI */
	m3885_set_proc_ram(0xd8, 0x81); // P60TASK, AC_PRESN#
	m3885_set_proc_ram(0xd9, 0x81); // P61TASK, LID#
	m3885_set_proc_ram(0xdc, 0x81); // P64TASK, FDD/LPT#

	/* Thermal */
	/* Bank 5 */
	m3885_set_variable(0x0c, (kstate5_flags & ~(7 << 4)) | (5 << 4));

	/* Thermal 0: Active cooling, Speed Step Down */
	m3885_set_proc_ram(0x81, 0x9c);    // THRM0
	m3885_set_proc_ram(0x82, 0x01);    // THRM0 CMD
	m3885_set_proc_ram(0x84, TH0LOW);  // THRM0 LOW
	m3885_set_proc_ram(0x85, TH0HIGH); // THRM0 HIGH
	m3885_set_proc_ram(0x86, 0x81);    // Set Task SMI#/SCI
	m3885_set_proc_ram(0x87, TH0CRIT); // THRM0 CRIT

	/* Thermal 1: Passive cooling, Fan On */
	m3885_set_proc_ram(0x89, 0x9c);    // THRM1
	m3885_set_proc_ram(0x8a, 0x01);    // THRM1 CMD
	m3885_set_proc_ram(0x8c, TH1LOW);  // THRM1 LOW
	m3885_set_proc_ram(0x8d, TH1HIGH); // THRM1 HIGH
	m3885_set_proc_ram(0x8e, 0x81);    // Set Task SMI#/SCI

	/* Switch Task to SMI */
	udelay(100 * 1000); // 100ms
	outb(KBD_SC, 0xca);
	udelay(100 * 1000); // 100ms
	outb(KBD_DATA, 0x17);

	/* Set P22 to high level, keyboard backlight default off */
	udelay(100 * 1000); // 100ms
	outb(KBD_SC, 0xc5);
	udelay(100 * 1000); // 100ms
	outb(KBD_DATA, 0x4a);
}

u8 m3885_gpio(u8 value)
{
#if 0
	int timeout;
#endif

	/* First write data */
	ec_write(M3885_CMDAT1, value);

	/* Issue command: ACCESS GPIO */
	ec_write(M3885_CMCMD, 0xc5);

#if 0
	/* CMCMD is 0 when the command is completed */
	timeout = 0xf;
	while (ec_read(M3885_CMCMD) && --timeout) {
		udelay(10);
		printk(BIOS_DEBUG, ".");
	}
	if (!timeout) {
		printk(BIOS_DEBUG, "\nTimeout while waiting for M3885 command!\n");
	}

	/* If it was a read function: Pin state */
	return ec_read(M3885_CMDAT1);
#else
	return 0;
#endif
}