1/*
2 * ip22-hpc.c: Routines for generic manipulation of the HPC controllers.
3 *
4 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1998 Ralf Baechle
6 */
7
8#include <linux/init.h>
9#include <linux/module.h>
10#include <linux/types.h>
11
12#include <asm/io.h>
13#include <asm/sgi/hpc3.h>
14#include <asm/sgi/ioc.h>
15#include <asm/sgi/ip22.h>
16
17struct hpc3_regs *hpc3c0, *hpc3c1;
18
19EXPORT_SYMBOL(hpc3c0);
20EXPORT_SYMBOL(hpc3c1);
21
22struct sgioc_regs *sgioc;
23
24EXPORT_SYMBOL(sgioc);
25
26/* We need software copies of these because they are write only. */
27u8 sgi_ioc_reset, sgi_ioc_write;
28
29extern char *system_type;
30
31void __init sgihpc_init(void)
32{
33	/* ioremap can't fail */
34	hpc3c0 = (struct hpc3_regs *)
35		 ioremap(HPC3_CHIP0_BASE, sizeof(struct hpc3_regs));
36	hpc3c1 = (struct hpc3_regs *)
37		 ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs));
38	/* IOC lives in PBUS PIO channel 6 */
39	sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6];
40
41	hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16;
42	if (ip22_is_fullhouse()) {
43		/* Full House comes with INT2 which lives in PBUS PIO
44		 * channel 4 */
45		sgint = (struct sgint_regs *)hpc3c0->pbus_extregs[4];
46		system_type = "SGI Indigo2";
47	} else {
48		/* Guiness comes with INT3 which is part of IOC */
49		sgint = &sgioc->int3;
50		system_type = "SGI Indy";
51	}
52
53	sgi_ioc_reset = (SGIOC_RESET_PPORT | SGIOC_RESET_KBDMOUSE |
54			 SGIOC_RESET_EISA | SGIOC_RESET_ISDN |
55			 SGIOC_RESET_LC0OFF);
56
57	sgi_ioc_write = (SGIOC_WRITE_EASEL | SGIOC_WRITE_NTHRESH |
58			 SGIOC_WRITE_TPSPEED | SGIOC_WRITE_EPSEL |
59			 SGIOC_WRITE_U0AMODE | SGIOC_WRITE_U1AMODE);
60
61	sgioc->reset = sgi_ioc_reset;
62	sgioc->write = sgi_ioc_write;
63}
64