/*
   *	ASP Device Driver
   *
   *	(c) Copyright 2000 The Puffin Group Inc.
   *
   *	This program is free software; you can redistribute it and/or modify
   *	it under the terms of the GNU General Public License as published by
   *      the Free Software Foundation; either version 2 of the License, or
   *      (at your option) any later version.
   *
   *	by Helge Deller <deller@gmx.de>
   */
  
  #include <linux/errno.h>
  #include <linux/init.h>
  #include <linux/interrupt.h>
  #include <linux/module.h>
  #include <linux/types.h>
  #include <asm/io.h>
  #include <asm/led.h>
  
  #include "gsc.h"
  
  #define ASP_GSC_IRQ	3		/* hardcoded interrupt for GSC */
  
  #define ASP_VER_OFFSET 	0x20		/* offset of ASP version */
  
  #define ASP_LED_ADDR	0xf0800020
  
  #define VIPER_INT_WORD  0xFFFBF088      /* addr of viper interrupt word */
  
  static struct gsc_asic asp;
  
  static void asp_choose_irq(struct parisc_device *dev, void *ctrl)
  {
  	int irq;
  
  	switch (dev->id.sversion) {
  	case 0x71:	irq =  9; break; /* SCSI */
  	case 0x72:	irq =  8; break; /* LAN */
  	case 0x73:	irq =  1; break; /* HIL */
  	case 0x74:	irq =  7; break; /* Centronics */
  	case 0x75:	irq = (dev->hw_path == 4) ? 5 : 6; break; /* RS232 */
  	case 0x76:	irq = 10; break; /* EISA BA */
  	case 0x77:	irq = 11; break; /* Graphics1 */
  	case 0x7a:	irq = 13; break; /* Audio (Bushmaster) */
  	case 0x7b:	irq = 13; break; /* Audio (Scorpio) */
  	case 0x7c:	irq =  3; break; /* FW SCSI */
  	case 0x7d:	irq =  4; break; /* FDDI */
  	case 0x7f:	irq = 13; break; /* Audio (Outfield) */
  	default:	return;		 /* Unknown */
  	}
  
  	gsc_asic_assign_irq(ctrl, irq, &dev->irq);
  
  	switch (dev->id.sversion) {
  	case 0x73:	irq =  2; break; /* i8042 High-priority */
  	case 0x76:	irq =  0; break; /* EISA BA */
  	default:	return;		 /* Other */
  	}
  
  	gsc_asic_assign_irq(ctrl, irq, &dev->aux_irq);
  }
  
  /* There are two register ranges we're interested in.  Interrupt /
   * Status / LED are at 0xf080xxxx and Asp special registers are at
   * 0xf082fxxx.  PDC only tells us that Asp is at 0xf082f000, so for
   * the purposes of interrupt handling, we have to tell other bits of
   * the kernel to look at the other registers.
   */
  #define ASP_INTERRUPT_ADDR 0xf0800000
  
  static int __init asp_init_chip(struct parisc_device *dev)
  {
  	struct gsc_irq gsc_irq;
  	int ret;
  
  	asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
  	asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
  	asp.hpa = ASP_INTERRUPT_ADDR;
  
  	printk(KERN_INFO "%s version %d at 0x%lx found.
  ", 
  		asp.name, asp.version, (unsigned long)dev->hpa.start);
  
  	/* the IRQ ASP should use */
  	ret = -EBUSY;
  	dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
  	if (dev->irq < 0) {
  		printk(KERN_ERR "%s(): cannot get GSC irq
  ", __func__);
  		goto out;
  	}
  
  	asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
  
  	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
  	if (ret < 0)
  		goto out;
  
  	/* Program VIPER to interrupt on the ASP irq */
  	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
  
  	/* Done init'ing, register this driver */
  	ret = gsc_common_setup(dev, &asp);
  	if (ret)
  		goto out;
  
  	gsc_fixup_irqs(dev, &asp, asp_choose_irq);
  	/* Mongoose is a sibling of Asp, not a child... */
  	gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
  
  	/* initialize the chassis LEDs */ 
  #ifdef CONFIG_CHASSIS_LCD_LED	
  	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE, 
  		    ASP_LED_ADDR);
  #endif
  
   out:
  	return ret;
  }
  
  static struct parisc_device_id asp_tbl[] = {
  	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
  	{ 0, }
  };
  
  struct parisc_driver asp_driver = {
  	.name =		"asp",
  	.id_table =	asp_tbl,
  	.probe =	asp_init_chip,
  };