drivers/parisc/asp.c

   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/irq.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
  33 static int asp_choose_irq(struct parisc_device *dev)
  34 {
  35         int irq = -1;
  36
  37         switch (dev->id.sversion) {
  38         case 0x71:      irq = 22; break; /* SCSI */
  39         case 0x72:      irq = 23; break; /* LAN */
  40         case 0x73:      irq = 30; break; /* HIL */
  41         case 0x74:      irq = 24; break; /* Centronics */
  42         case 0x75:      irq = (dev->hw_path == 4) ? 26 : 25; break; /* RS232 */
  43         case 0x76:      irq = 21; break; /* EISA BA */
  44         case 0x77:      irq = 20; break; /* Graphics1 */
  45         case 0x7a:      irq = 18; break; /* Audio (Bushmaster) */
  46         case 0x7b:      irq = 18; break; /* Audio (Scorpio) */
  47         case 0x7c:      irq = 28; break; /* FW SCSI */
  48         case 0x7d:      irq = 27; break; /* FDDI */
  49         case 0x7f:      irq = 18; break; /* Audio (Outfield) */
  50         }
  51         return irq;
  52 }
  53
  54 /* There are two register ranges we're interested in.  Interrupt /
  55  * Status / LED are at 0xf080xxxx and Asp special registers are at
  56  * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
  57  * the purposes of interrupt handling, we have to tell other bits of
  58  * the kernel to look at the other registers.
  59  */
  60 #define ASP_INTERRUPT_ADDR 0xf0800000
  61
  62 int __init
  63 asp_init_chip(struct parisc_device *dev)
  64 {
  65         struct busdevice *asp;
  66         struct gsc_irq gsc_irq;
  67         int irq, ret;
  68
  69         asp = kmalloc(sizeof(struct busdevice), GFP_KERNEL);
  70         if(!asp)
  71                 return -ENOMEM;
  72
  73         asp->version = gsc_readb(dev->hpa + ASP_VER_OFFSET) & 0xf;
  74         asp->name = (asp->version == 1) ? "Asp" : "Cutoff";
  75         asp->hpa = ASP_INTERRUPT_ADDR;
  76
  77         printk(KERN_INFO "%s version %d at 0x%lx found.\n",
  78                 asp->name, asp->version, dev->hpa);
  79
  80         /* the IRQ ASP should use */
  81         ret = -EBUSY;
  82         irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
  83         if (irq < 0) {
  84                 printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__);
  85                 goto out;
  86         }
  87
  88         ret = request_irq(gsc_irq.irq, busdev_barked, 0, "asp", asp);
  89         if (ret < 0)
  90                 goto out;
  91
  92         /* Save this for debugging later */
  93         asp->parent_irq = gsc_irq.irq;
  94         asp->eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
  95
  96         /* Program VIPER to interrupt on the ASP irq */
  97         gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
  98
  99         /* Done init'ing, register this driver */
 100         ret = gsc_common_irqsetup(dev, asp);
 101         if (ret)
 102                 goto out;
 103
 104         fixup_child_irqs(dev, asp->busdev_region->data.irqbase, asp_choose_irq);
 105         /* Mongoose is a sibling of Asp, not a child... */
 106         fixup_child_irqs(dev->parent, asp->busdev_region->data.irqbase,
 107                         asp_choose_irq);
 108
 109         /* initialize the chassis LEDs */
 110 #ifdef CONFIG_CHASSIS_LCD_LED
 111         register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
 112                     (char *)ASP_LED_ADDR);
 113 #endif
 114
 115         return 0;
 116
 117 out:
 118         kfree(asp);
 119         return ret;
 120 }
 121
 122 static struct parisc_device_id asp_tbl[] = {
 123         { HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
 124         { 0, }
 125 };
 126
 127 struct parisc_driver asp_driver = {
 128         .name =         "Asp",
 129         .id_table =     asp_tbl,
 130         .probe =        asp_init_chip,
 131 };