linux/drivers/parisc/asp.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *      ASP Device Driver
   4 *
   5 *      (c) Copyright 2000 The Puffin Group Inc.
   6 *
   7 *      by Helge Deller <deller@gmx.de>
   8 */
   9
  10#include <linux/errno.h>
  11#include <linux/init.h>
  12#include <linux/interrupt.h>
  13#include <linux/module.h>
  14#include <linux/types.h>
  15#include <asm/io.h>
  16#include <asm/led.h>
  17
  18#include "gsc.h"
  19
  20#define ASP_GSC_IRQ     3               /* hardcoded interrupt for GSC */
  21
  22#define ASP_VER_OFFSET  0x20            /* offset of ASP version */
  23
  24#define ASP_LED_ADDR    0xf0800020
  25
  26#define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */
  27
  28static struct gsc_asic asp;
  29
  30static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
  31{
  32        int irq;
  33
  34        switch (dev->id.sversion) {
  35        case 0x71:      irq =  9; break; /* SCSI */
  36        case 0x72:      irq =  8; break; /* LAN */
  37        case 0x73:      irq =  1; break; /* HIL */
  38        case 0x74:      irq =  7; break; /* Centronics */
  39        case 0x75:      irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
  40        case 0x76:      irq = 10; break; /* EISA BA */
  41        case 0x77:      irq = 11; break; /* Graphics1 */
  42        case 0x7a:      irq = 13; break; /* Audio (Bushmaster) */
  43        case 0x7b:      irq = 13; break; /* Audio (Scorpio) */
  44        case 0x7c:      irq =  3; break; /* FW SCSI */
  45        case 0x7d:      irq =  4; break; /* FDDI */
  46        case 0x7f:      irq = 13; break; /* Audio (Outfield) */
  47        default:        return;          /* Unknown */
  48        }
  49
  50        gsc_asic_assign_irq(ctrl, irq, &dev->irq);
  51
  52        switch (dev->id.sversion) {
  53        case 0x73:      irq =  2; break; /* i8042 High-priority */
  54        case 0x76:      irq =  0; break; /* EISA BA */
  55        default:        return;          /* Other */
  56        }
  57
  58        gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
  59}
  60
  61/* There are two register ranges we're interested in.  Interrupt /
  62 * Status / LED are at 0xf080xxxx and Asp special registers are at
  63 * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
  64 * the purposes of interrupt handling, we have to tell other bits of
  65 * the kernel to look at the other registers.
  66 */
  67#define ASP_INTERRUPT_ADDR 0xf0800000
  68
  69static int __init asp_init_chip(struct parisc_device *dev)
  70{
  71        struct gsc_irq gsc_irq;
  72        int ret;
  73
  74        asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
  75        asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
  76        asp.hpa = ASP_INTERRUPT_ADDR;
  77
  78        printk(KERN_INFO "%s version %d at 0x%lx found.\n", 
  79                asp.name, asp.version, (unsigned long)dev->hpa.start);
  80
  81        /* the IRQ ASP should use */
  82        ret = -EBUSY;
  83        dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
  84        if (dev->irq < 0) {
  85                printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
  86                goto out;
  87        }
  88
  89        asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
  90
  91        ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
  92        if (ret < 0)
  93                goto out;
  94
  95        /* Program VIPER to interrupt on the ASP irq */
  96        gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
  97
  98        /* Done init'ing, register this driver */
  99        ret = gsc_common_setup(dev, &asp);
 100        if (ret)
 101                goto out;
 102
 103        gsc_fixup_irqs(dev, &asp, asp_choose_irq);
 104        /* Mongoose is a sibling of Asp, not a child... */
 105        gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
 106
 107        /* initialize the chassis LEDs */ 
 108#ifdef CONFIG_CHASSIS_LCD_LED   
 109        register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
 110                    ASP_LED_ADDR);
 111#endif
 112
 113 out:
 114        return ret;
 115}
 116
 117static const struct parisc_device_id asp_tbl[] __initconst = {
 118        { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
 119        { 0, }
 120};
 121
 122struct parisc_driver asp_driver __refdata = {
 123        .name =         "asp",
 124        .id_table =     asp_tbl,
 125        .probe =        asp_init_chip,
 126};
 127