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/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
  33 static struct gsc_asic asp;
  34
  35 static 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
  74 static int __init asp_init_chip(struct parisc_device *dev)
  75 {
  76         struct gsc_irq gsc_irq;
  77         int ret;
  78
  79         asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
  80         asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
  81         asp.hpa = ASP_INTERRUPT_ADDR;
  82
  83         printk(KERN_INFO "%s version %d at 0x%lx found.\n",
  84                 asp.name, asp.version, (unsigned long)dev->hpa.start);
  85
  86         /* the IRQ ASP should use */
  87         ret = -EBUSY;
  88         dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
  89         if (dev->irq < 0) {
  90                 printk(KERN_ERR "%s(): cannot get GSC irq\n", __func__);
  91                 goto out;
  92         }
  93
  94         asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
  95
  96         ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
  97         if (ret < 0)
  98                 goto out;
  99
 100         /* Program VIPER to interrupt on the ASP irq */
 101         gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
 102
 103         /* Done init'ing, register this driver */
 104         ret = gsc_common_setup(dev, &asp);
 105         if (ret)
 106                 goto out;
 107
 108         gsc_fixup_irqs(dev, &asp, asp_choose_irq);
 109         /* Mongoose is a sibling of Asp, not a child... */
 110         gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
 111
 112         /* initialize the chassis LEDs */
 113 #ifdef CONFIG_CHASSIS_LCD_LED
 114         register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
 115                     ASP_LED_ADDR);
 116 #endif
 117
 118  out:
 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 };