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/*
 * Copyright (C) 2005 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

 /** @addtogroup mips32 
 * @{
 */
/** @file
 */

#include <arch/drivers/arc.h>
#include <arch/mm/page.h>
#include <print.h>
#include <arch.h>
#include <arch/byteorder.h>
#include <arch/mm/frame.h>
#include <mm/frame.h>
#include <interrupt.h>
#include <align.h>
#include <console/console.h>
#include <console/kconsole.h>
#include <console/cmd.h>
#include <mm/slab.h>

/* This is a good joke, SGI HAS different types than NT bioses... */
/* Here is the SGI type */
static char *basetypes[] = {
    "ExceptionBlock",
    "SystemParameterBlock",
    "FreeContiguous",
    "FreeMemory",
    "BadMemory",
    "LoadedProgram",
    "FirmwareTemporary",
    "FirmwarePermanent"
};

static char *ctypes[] = {
    "ARC_type",
    "CPU_type",
    "FPU_type",
    "PrimaryICache",
    "PrimaryDCache",
    "SecondaryICache",
    "SecondaryDCache",
    "SecondaryCache",
    "Memory",
    "EISAAdapter",
    "TCAdapter",
    "SCSIAdapter",
    "DTIAdapter",
    "MultiFunctionAdapter",
    "DiskController",
    "TapeController",
    "CDROMController",
    "WORMController",
    "SerialController",
    "NetworkController",
    "DisplayController",
    "ParallelController",
    "PointerController",
    "KeyboardController",
    "AudioController",
    "OtherController",
    "DiskPeripheral",
    "FloppyDiskPeripheral",
    "TapePeripheral",
    "ModemPeripheral",
    "MonitorPeripheral",
    "PrinterPeripheral",
    "PointerPeripheral",
    "KeyboardPeripheral",
    "TerminalPeripheral",
    "OtherPeripheral",
    "LinePeripheral",
    "NetworkPeripheral"
    "OtherPeripheral",
    "XTalkAdapter",
    "PCIAdapter",
    "GIOAdapter",
    "TPUAdapter",
    "Anonymous"
};

static arc_sbp *sbp = (arc_sbp *)PA2KA(0x1000);
static arc_func_vector_t *arc_entry; 


static void arc_putchar(char ch);

/** Return true if ARC is available */
int arc_enabled(void)
{
    return sbp != NULL;
}


/** Print configuration data that ARC reports about component */
static void arc_print_confdata(arc_component *c)
{
    cm_resource_list *configdata;
    int i;

    if (!c->configdatasize)
        return; /* No configuration data */

    configdata = malloc(c->configdatasize, 0);

    if (arc_entry->getconfigurationdata(configdata, c)) {
        free(configdata);
        return;
    }
    /* Does not seem to return meaningful data, don't use now */
    free(configdata);
    return;
    
    for (i=0; i < configdata->count; i++) {
        switch (configdata->descr[i].type) {
        case CmResourceTypePort:
            printf("Port: %p-size:%d ",
                   (uintptr_t)configdata->descr[i].u.port.start,
                   configdata->descr[i].u.port.length);
            break;
        case CmResourceTypeInterrupt:
            printf("Irq: level(%d) vector(%d) ",
                   configdata->descr[i].u.interrupt.level,
                   configdata->descr[i].u.interrupt.vector);
            break;
        case CmResourceTypeMemory:
            printf("Memory: %p-size:%d ",
                   (uintptr_t)configdata->descr[i].u.port.start,
                   configdata->descr[i].u.port.length);
            break;
        default:
            break;
        }
    }

    free(configdata);
}

/** Print information about component */
static void arc_print_component(arc_component *c)
{
    int i;

    printf("%s: ",ctypes[c->type]);
    for (i=0;i < c->identifier_len;i++)
        printf("%c",c->identifier[i]);

    printf(" ");
    arc_print_confdata(c);
    printf("\n");
}

/**
 * Read from ARC bios configuration data and print it
 */
static int cmd_arc_print_devices(cmd_arg_t *argv)
{
    arc_component *c,*next;

    c = arc_entry->getchild(NULL);
    while (c) {
        arc_print_component(c);
        next = arc_entry->getchild(c);
        while (!next) {
            next = arc_entry->getpeer(c);
            if (!next)
                c = arc_entry->getparent(c);
            if (!c)
                return 0;
        }
        c = next;
    }
    return 1;
}
static cmd_info_t devlist_info = {
    .name = "arcdevlist",
    .description = "Print arc device list",
    .func = cmd_arc_print_devices,
    .argc = 0
};


/** Read from arc bios memory map and print it
 *
 */
static int cmd_arc_print_memmap(cmd_arg_t *argv)
{
    arc_memdescriptor_t *desc;

    printf("Memory map:\n");

    desc = arc_entry->getmemorydescriptor(NULL);
    while (desc) {
        printf("%s: %d(%p) (size: %dKB)\n",basetypes[desc->type],
               desc->basepage * ARC_FRAME,
               desc->basepage * ARC_FRAME,
               desc->basecount*ARC_FRAME/1024);
        desc = arc_entry->getmemorydescriptor(desc);
    }
    return 1;
}
static cmd_info_t memmap_info = {
    .name = "arcmemmap",
    .description = "Print arc memory map",
    .func = cmd_arc_print_memmap,
    .argc = 0
};

/** Print charactor to console */
static void arc_putchar(char ch)
{
    uint32_t cnt;
    ipl_t ipl;

    /* TODO: Should be spinlock? */
    ipl = interrupts_disable();
    arc_entry->write(1, &ch, 1, &cnt);
    interrupts_restore(ipl);
    
}

static int cmd_reboot(cmd_arg_t *argv)
{
    arc_entry->reboot();
    return 0;
}
static cmd_info_t reboot_info = {
    .name = "reboot",
    .description = "Reboot computer",
    .func = cmd_reboot,
    .argc = 0
};

/** Initialize ARC structure
 *
 * @return 0 - ARC OK, -1 - ARC does not exist
 */
int arc_init(void)
{
    if (sbp->signature != ARC_MAGIC) {
        sbp = NULL;
        return -1;
    }
    arc_entry = sbp->firmwarevector;

    arc_putchar('A');
    arc_putchar('R');
    arc_putchar('C');
    arc_putchar('\n');

    /* Add command for resetting the computer */
    cmd_initialize(&reboot_info);
    cmd_register(&reboot_info);
    cmd_initialize(&memmap_info);
    cmd_register(&memmap_info);
    cmd_initialize(&devlist_info);
    cmd_register(&devlist_info);

    return 0;
}

static bool kbd_polling_enabled;
static chardev_t console;

/** Try to get character, return character or -1 if not available */
static void arc_keyboard_poll(void)
{
    char ch;
    uint32_t count;
    long result;
    
    if (! kbd_polling_enabled)
        return;

    if (arc_entry->getreadstatus(0))
        return;
    result = arc_entry->read(0, &ch, 1, &count);
    if (result || count!=1) {
        return;
    }
    if (ch == '\r')
        ch = '\n';
    if (ch == 0x7f)
        ch = '\b';
    
    chardev_push_character(&console, ch);
}

static char arc_read(chardev_t *dev)
{
    char ch;
    uint32_t count;
    long result;

    result = arc_entry->read(0, &ch, 1, &count);
    if (result || count!=1) {
        printf("Error reading from ARC keyboard.\n");
        cpu_halt();
    }
    if (ch == '\r')
        return '\n';
    if (ch == 0x7f)
        return '\b';
    return ch;
}

static void arc_write(chardev_t *dev, const char ch)
{
    arc_putchar(ch);
}

static void arc_enable(chardev_t *dev)
{
    kbd_polling_enabled = true;
}

static void arc_disable(chardev_t *dev)
{
    kbd_polling_enabled = false;
}

static chardev_operations_t arc_ops = {
    .resume = arc_enable,
    .suspend = arc_disable,
    .write = arc_write,
    .read = arc_read
};

iroutine old_timer;
/** Do polling on timer interrupt */
static void timer_replace(int n, istate_t *istate)
{
    arc_keyboard_poll();
    old_timer(n, istate);
    arc_keyboard_poll();
}

void arc_console(void)
{
    kbd_polling_enabled = true;
    
    chardev_initialize("arc_console", &console, &arc_ops);
    old_timer = int_register(TIMER_IRQ, "arc_kb_poll", timer_replace);
    stdin = &console;
    stdout = &console;
}

/* Initialize frame zones from ARC firmware. 
 * In the future we may use even the FirmwareTemporary regions,
 * currently we use the FreeMemory (what about the LoadedProgram?)
 */
void arc_frame_init(void)
{
    arc_memdescriptor_t *desc;
    int total = 0;
    uintptr_t base;
    size_t basesize;

    desc = arc_entry->getmemorydescriptor(NULL);
    while (desc) {
        if (desc->type == FreeMemory ||
            desc->type == FreeContiguous) {
            base = desc->basepage*ARC_FRAME;
            basesize = desc->basecount*ARC_FRAME;

            if (base % FRAME_SIZE ) {
                basesize -= FRAME_SIZE - (base % FRAME_SIZE);
                base = ALIGN_UP(base, FRAME_SIZE);
            }
            basesize = ALIGN_DOWN(basesize, FRAME_SIZE);

            total += basesize;
            
            zone_create(ADDR2PFN(base), SIZE2FRAMES(basesize),
                    ADDR2PFN(base), 0);
        }
        desc = arc_entry->getmemorydescriptor(desc);
    }

    config.memory_size = total;
}


 /** @}
 */