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Linux/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 };
131 

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