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
33static struct gsc_asic asp;
34
35static 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
74int __init
75asp_init_chip(struct parisc_device *dev)
76{
77	struct gsc_irq gsc_irq;
78	int ret;
79
80	asp.version = gsc_readb(dev->hpa.start + ASP_VER_OFFSET) & 0xf;
81	asp.name = (asp.version == 1) ? "Asp" : "Cutoff";
82	asp.hpa = ASP_INTERRUPT_ADDR;
83
84	printk(KERN_INFO "%s version %d at 0x%lx found.\n",
85		asp.name, asp.version, dev->hpa.start);
86
87	/* the IRQ ASP should use */
88	ret = -EBUSY;
89	dev->irq = gsc_claim_irq(&gsc_irq, ASP_GSC_IRQ);
90	if (dev->irq < 0) {
91		printk(KERN_ERR "%s(): cannot get GSC irq\n", __FUNCTION__);
92		goto out;
93	}
94
95	asp.eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;
96
97	ret = request_irq(gsc_irq.irq, gsc_asic_intr, 0, "asp", &asp);
98	if (ret < 0)
99		goto out;
100
101	/* Program VIPER to interrupt on the ASP irq */
102	gsc_writel((1 << (31 - ASP_GSC_IRQ)),VIPER_INT_WORD);
103
104	/* Done init'ing, register this driver */
105	ret = gsc_common_setup(dev, &asp);
106	if (ret)
107		goto out;
108
109	gsc_fixup_irqs(dev, &asp, asp_choose_irq);
110	/* Mongoose is a sibling of Asp, not a child... */
111	gsc_fixup_irqs(parisc_parent(dev), &asp, asp_choose_irq);
112
113	/* initialize the chassis LEDs */
114#ifdef CONFIG_CHASSIS_LCD_LED
115	register_led_driver(DISPLAY_MODEL_OLD_ASP, LED_CMD_REG_NONE,
116		    ASP_LED_ADDR);
117#endif
118
119 out:
120	return ret;
121}
122
123static struct parisc_device_id asp_tbl[] = {
124	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
125	{ 0, }
126};
127
128struct parisc_driver asp_driver = {
129	.name =		"asp",
130	.id_table =	asp_tbl,
131	.probe =	asp_init_chip,
132};
133