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/*

 *    $Id: zorro.c,v 1.1.1.1 2004-04-15 02:26:59 phoenix Exp $

 *

 *    Zorro Bus Services

 *

 *    Copyright (C) 1995-2000 Geert Uytterhoeven

 *

 *    This file is subject to the terms and conditions of the GNU General Public

 *    License.  See the file COPYING in the main directory of this archive

 *    for more details.

 */

#include <linux/module.h>

#include <linux/types.h>

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/zorro.h>

#include <asm/setup.h>

#include <asm/bitops.h>

#include <asm/amigahw.h>

    /*

     *  Zorro Expansion Devices

     */

u_int zorro_num_autocon = 0;

struct zorro_dev zorro_autocon[ZORRO_NUM_AUTO];

    /*

     *  Zorro Bus Resources

     *  Order _does_ matter! (see code below)

     */

static struct resource zorro_res[4] = {

    /* Zorro II regions (on Zorro II/III) */

    { "Zorro II exp", 0x00e80000, 0x00efffff },

    { "Zorro II mem", 0x00200000, 0x009fffff },

    /* Zorro III regions (on Zorro III only) */

    { "Zorro III exp", 0xff000000, 0xffffffff },

    { "Zorro III cfg", 0x40000000, 0x7fffffff }

};

static u_int zorro_num_res __initdata = 0;

    /*

     *  Find Zorro Devices

     */

struct zorro_dev *zorro_find_device(zorro_id id, struct zorro_dev *from)

{

    struct zorro_dev *dev;

    if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))

        return NULL;

    for (dev = from ? from+1 : &zorro_autocon[0];

         dev < zorro_autocon+zorro_num_autocon;

         dev++)

        if (id == ZORRO_WILDCARD || id == dev->id)

            return dev;

    return NULL;

}

    /*

     *  Bitmask indicating portions of available Zorro II RAM that are unused

     *  by the system. Every bit represents a 64K chunk, for a maximum of 8MB

     *  (128 chunks, physical 0x00200000-0x009fffff).

     *

     *  If you want to use (= allocate) portions of this RAM, you should clear

     *  the corresponding bits.

     *

     *  Possible uses:

     *      - z2ram device

     *      - SCSI DMA bounce buffers

     *

     *  FIXME: use the normal resource management

     */

u32 zorro_unused_z2ram[4] = { 0, 0, 0, 0 };

static void __init mark_region(unsigned long start, unsigned long end,

                               int flag)

{

    if (flag)

        start += Z2RAM_CHUNKMASK;

    else

        end += Z2RAM_CHUNKMASK;

    start &= ~Z2RAM_CHUNKMASK;

    end &= ~Z2RAM_CHUNKMASK;

    if (end <= Z2RAM_START || start >= Z2RAM_END)

        return;

    start = start < Z2RAM_START ? 0x00000000 : start-Z2RAM_START;

    end = end > Z2RAM_END ? Z2RAM_SIZE : end-Z2RAM_START;

    while (start < end) {

        u32 chunk = start>>Z2RAM_CHUNKSHIFT;

        if (flag)

            set_bit(chunk, zorro_unused_z2ram);

        else

            clear_bit(chunk, zorro_unused_z2ram);

        start += Z2RAM_CHUNKSIZE;

    }

}

static struct resource __init *zorro_find_parent_resource(struct zorro_dev *z)

{

    int i;

    for (i = 0; i < zorro_num_res; i++)

        if (z->resource.start >= zorro_res[i].start &&

            z->resource.end <= zorro_res[i].end)

                return &zorro_res[i];

    return &iomem_resource;

}

    /*

     *  Initialization

     */

void __init zorro_init(void)

{

    struct zorro_dev *dev;

    u_int i;

    if (!MACH_IS_AMIGA || !AMIGAHW_PRESENT(ZORRO))

        return;

    printk("Zorro: Probing AutoConfig expansion devices: %d device%s\n",

           zorro_num_autocon, zorro_num_autocon == 1 ? "" : "s");

    /* Request the resources */

    zorro_num_res = AMIGAHW_PRESENT(ZORRO3) ? 4 : 2;

    for (i = 0; i < zorro_num_res; i++)

        request_resource(&iomem_resource, &zorro_res[i]);

    for (i = 0; i < zorro_num_autocon; i++) {

        dev = &zorro_autocon[i];

        dev->id = (dev->rom.er_Manufacturer<<16) | (dev->rom.er_Product<<8);

        if (dev->id == ZORRO_PROD_GVP_EPC_BASE) {

            /* GVP quirk */

            unsigned long magic = dev->resource.start+0x8000;

            dev->id |= *(u16 *)ZTWO_VADDR(magic) & GVP_PRODMASK;

        }

        sprintf(dev->name, "Zorro device %08x", dev->id);

        zorro_name_device(dev);

        dev->resource.name = dev->name;

        if (request_resource(zorro_find_parent_resource(dev), &dev->resource))

            printk(KERN_ERR "Zorro: Address space collision on device %s "

                   "[%lx:%lx]\n",

                   dev->name, dev->resource.start, dev->resource.end);

    }

    /* Mark all available Zorro II memory */

    for (i = 0; i < zorro_num_autocon; i++) {

        dev = &zorro_autocon[i];

        if (dev->rom.er_Type & ERTF_MEMLIST)

            mark_region(dev->resource.start, dev->resource.end+1, 1);

    }

    /* Unmark all used Zorro II memory */

    for (i = 0; i < m68k_num_memory; i++)

        if (m68k_memory[i].addr < 16*1024*1024)

            mark_region(m68k_memory[i].addr,

                        m68k_memory[i].addr+m68k_memory[i].size, 0);

}

EXPORT_SYMBOL(zorro_find_device);

EXPORT_SYMBOL(zorro_unused_z2ram);

MODULE_LICENSE("GPL");