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
32static struct gsc_asic asp;
33
34static 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
73static 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
121static struct parisc_device_id asp_tbl[] = {
122	{ HPHW_BA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00070 },
123	{ 0, }
124};
125
126struct parisc_driver asp_driver = {
127	.name =		"asp",
128	.id_table =	asp_tbl,
129	.probe =	asp_init_chip,
130};
131