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/*

 *      ASP Device Driver

 *

 *      (c) Copyright 2000 The Puffin Group Inc.

 *

 *      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.

 *

 *      by Helge Deller <deller@gmx.de>

 */

#include <linux/errno.h>

#include <linux/init.h>

#include <linux/irq.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/types.h>

#include <asm/gsc.h>

#include <asm/led.h>

#include "busdevice.h"

#define ASP_GSC_IRQ     3               /* hardcoded interrupt for GSC */

#define ASP_VER_OFFSET  0x20            /* offset of ASP version */

#define ASP_LED_ADDR    0xf0800020

#define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */

static int asp_choose_irq(struct parisc_device *dev)

{

        int irq = -1;

        switch (dev->id.sversion) {

        case 0x71:      irq = 22; break; /* SCSI */

        case 0x72:      irq = 23; break; /* LAN */

        case 0x73:      irq = 30; break; /* HIL */

        case 0x74:      irq = 24; break; /* Centronics */

        case 0x75:      irq = (dev->hw_path == 4) ? 26 : 25; break; /* RS232 */

        case 0x76:      irq = 21; break; /* EISA BA */

        case 0x77:      irq = 20; break; /* Graphics1 */

        case 0x7a:      irq = 18; break; /* Audio (Bushmaster) */

        case 0x7b:      irq = 18; break; /* Audio (Scorpio) */

        case 0x7c:      irq = 28; break; /* FW SCSI */

        case 0x7d:      irq = 27; break; /* FDDI */

        case 0x7f:      irq = 18; break; /* Audio (Outfield) */

        }

        return irq;

}

/* There are two register ranges we're interested in.  Interrupt /

 * Status / LED are at 0xf080xxxx and Asp special registers are at

 * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for

 * the purposes of interrupt handling, we have to tell other bits of

 * the kernel to look at the other registers.

 */

#define ASP_INTERRUPT_ADDR 0xf0800000

int __init

asp_init_chip(struct parisc_device *dev)

{

        struct busdevice *asp;

        struct gsc_irq gsc_irq;

        int irq, ret;

        asp = kmalloc(sizeof(struct busdevice), GFP_KERNEL);

        if(!asp)

                return -ENOMEM;

        asp->version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf;

        asp->name = (asp->version == 1) ? "Asp" : "Cutoff";

        asp->hpa = ASP_INTERRUPT_ADDR;

        printk(KERN_INFO "%s version %d at 0x%lx found.\n",

                asp->name, asp->version, dev->hpa);

        /* the IRQ ASP should use */

        ret = -EBUSY;

        irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);

        if (irq < 0) {

                printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__);

                goto out;

        }

        ret = request_irq(gsc_irq.irq, busdev_barked, 0, "asp", asp);

        if (ret < 0)

                goto out;

        /* Save this for debugging later */

        asp->parent_irq = gsc_irq.irq;

        asp->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

        /* Program VIPER to interrupt on the ASP irq */

        gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);

        /* Done init'ing, register this driver */

        ret = gsc_common_irqsetup(dev, asp);

        if (ret)

                goto out;

        fixup_child_irqs(dev, asp->busdev_region->data.irqbase, asp_choose_irq);

        /* Mongoose is a sibling of Asp, not a child... */

        fixup_child_irqs(dev->parent, asp->busdev_region->data.irqbase,

                        asp_choose_irq);

        /* initialize the chassis LEDs */

#ifdef CONFIG_CHASSIS_LCD_LED   

        register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,

                    (char *)ASP_LED_ADDR);

#endif

        return 0;

out:

        kfree(asp);

        return ret;

}

static struct parisc_device_id asp_tbl[] = {

        { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },

        { 0, }

};

struct parisc_driver asp_driver = {

        name:           "Asp",

        id_table:       asp_tbl,

        probe:          asp_init_chip,

};