linux/drivers/parisc/asp.c
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   1/*
   2 *      ASP Device Driver
   3 *
   4 *      (c) Copyright 2000 The Puffin Group Inc.
   5 *
   6 *      This program is free software; you can redistribute it and/or modify
   7 *      it under the terms of the GNU General Public License as published by
   8 *      the Free Software Foundation; either version 2 of the License, or
   9 *      (at your option) any later version.
  10 *
  11 *      by Helge Deller <deller@gmx.de>
  12 */
  13
  14#include <linux/errno.h>
  15#include <linux/init.h>
  16#include <linux/interrupt.h>
  17#include <linux/module.h>
  18#include <linux/slab.h>
  19#include <linux/types.h>
  20#include <asm/io.h>
  21#include <asm/led.h>
  22
  23#include "gsc.h"
  24
  25#define ASP_GSC_IRQ     3               /* hardcoded interrupt for GSC */
  26
  27#define ASP_VER_OFFSET  0x20            /* offset of ASP version */
  28
  29#define ASP_LED_ADDR    0xf0800020
  30
  31#define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */
  32
  33static struct gsc_asic asp;
  34
  35static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
  36{
  37        int irq;
  38
  39        switch (dev->id.sversion) {
  40        case 0x71:      irq =  9; break; /* SCSI */
  41        case 0x72:      irq =  8; break; /* LAN */
  42        case 0x73:      irq =  1; break; /* HIL */
  43        case 0x74:      irq =  7; break; /* Centronics */
  44        case 0x75:      irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
  45        case 0x76:      irq = 10; break; /* EISA BA */
  46        case 0x77:      irq = 11; break; /* Graphics1 */
  47        case 0x7a:      irq = 13; break; /* Audio (Bushmaster) */
  48        case 0x7b:      irq = 13; break; /* Audio (Scorpio) */
  49        case 0x7c:      irq =  3; break; /* FW SCSI */
  50        case 0x7d:      irq =  4; break; /* FDDI */
  51        case 0x7f:      irq = 13; break; /* Audio (Outfield) */
  52        default:        return;          /* Unknown */
  53        }
  54
  55        gsc_asic_assign_irq(ctrl, irq, &dev->irq);
  56
  57        switch (dev->id.sversion) {
  58        case 0x73:      irq =  2; break; /* i8042 High-priority */
  59        case 0x76:      irq =  0; break; /* EISA BA */
  60        default:        return;          /* Other */
  61        }
  62
  63        gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
  64}
  65
  66/* There are two register ranges we're interested in.  Interrupt /
  67 * Status / LED are at 0xf080xxxx and Asp special registers are at
  68 * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
  69 * the purposes of interrupt handling, we have to tell other bits of
  70 * the kernel to look at the other registers.
  71 */
  72#define ASP_INTERRUPT_ADDR 0xf0800000
  73
  74int __init
  75asp_init_chip(struct parisc_device *dev)
  76{
  77        struct gsc_irq gsc_irq;
  78        int ret;
  79
  80        asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
  81        asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
  82        asp.hpa = ASP_INTERRUPT_ADDR;
  83
  84        printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
  85                asp.name, asp.version, dev->hpa.start);
  86
  87        /* the IRQ ASP should use */
  88        ret = -EBUSY;
  89        dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
  90        if (dev->irq < 0) {
  91                printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
  92                goto out;
  93        }
  94
  95        asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
  96
  97        ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
  98        if (ret < 0)
  99                goto out;
 100
 101        /* Program VIPER to interrupt on the ASP irq */
 102        gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
 103
 104        /* Done init'ing, register this driver */
 105        ret = gsc_common_setup(dev, &asp);
 106        if (ret)
 107                goto out;
 108
 109        gsc_fixup_irqs(dev, &asp, asp_choose_irq);
 110        /* Mongoose is a sibling of Asp, not a child... */
 111        gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
 112
 113        /* initialize the chassis LEDs */ 
 114#ifdef CONFIG_CHASSIS_LCD_LED   
 115        register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
 116                    ASP_LED_ADDR);
 117#endif
 118
 119 out:
 120        return ret;
 121}
 122
 123static struct parisc_device_id asp_tbl[] = {
 124        { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
 125        { 0, }
 126};
 127
 128struct parisc_driver asp_driver = {
 129        .name =         "asp",
 130        .id_table =     asp_tbl,
 131        .probe =        asp_init_chip,
 132};
 133