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