1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * ip22-hpc.c: Routines for generic manipulation of the HPC controllers. |
4 | * |
5 | * Copyright (C) 1996 David S. Miller (davem@davemloft.net) |
6 | * Copyright (C) 1998 Ralf Baechle |
7 | */ |
8 | |
9 | #include <linux/export.h> |
10 | #include <linux/init.h> |
11 | #include <linux/types.h> |
12 | |
13 | #include <asm/io.h> |
14 | #include <asm/sgi/hpc3.h> |
15 | #include <asm/sgi/ioc.h> |
16 | #include <asm/sgi/ip22.h> |
17 | |
18 | struct hpc3_regs *hpc3c0, *hpc3c1; |
19 | |
20 | EXPORT_SYMBOL(hpc3c0); |
21 | EXPORT_SYMBOL(hpc3c1); |
22 | |
23 | struct sgioc_regs *sgioc; |
24 | |
25 | EXPORT_SYMBOL(sgioc); |
26 | |
27 | /* We need software copies of these because they are write only. */ |
28 | u8 sgi_ioc_reset, sgi_ioc_write; |
29 | |
30 | extern char *system_type; |
31 | |
32 | void __init sgihpc_init(void) |
33 | { |
34 | /* ioremap can't fail */ |
35 | hpc3c0 = (struct hpc3_regs *) |
36 | ioremap(HPC3_CHIP0_BASE, sizeof(struct hpc3_regs)); |
37 | hpc3c1 = (struct hpc3_regs *) |
38 | ioremap(HPC3_CHIP1_BASE, sizeof(struct hpc3_regs)); |
39 | /* IOC lives in PBUS PIO channel 6 */ |
40 | sgioc = (struct sgioc_regs *)hpc3c0->pbus_extregs[6]; |
41 | |
42 | hpc3c0->pbus_piocfg[6][0] |= HPC3_PIOCFG_DS16; |
43 | if (ip22_is_fullhouse()) { |
44 | /* Full House comes with INT2 which lives in PBUS PIO |
45 | * channel 4 */ |
46 | sgint = (struct sgint_regs *)hpc3c0->pbus_extregs[4]; |
47 | system_type = "SGI Indigo2" ; |
48 | } else { |
49 | /* Guiness comes with INT3 which is part of IOC */ |
50 | sgint = &sgioc->int3; |
51 | system_type = "SGI Indy" ; |
52 | } |
53 | |
54 | sgi_ioc_reset = (SGIOC_RESET_PPORT | SGIOC_RESET_KBDMOUSE | |
55 | SGIOC_RESET_EISA | SGIOC_RESET_ISDN | |
56 | SGIOC_RESET_LC0OFF); |
57 | |
58 | sgi_ioc_write = (SGIOC_WRITE_EASEL | SGIOC_WRITE_NTHRESH | |
59 | SGIOC_WRITE_TPSPEED | SGIOC_WRITE_EPSEL | |
60 | SGIOC_WRITE_U0AMODE | SGIOC_WRITE_U1AMODE); |
61 | |
62 | sgioc->reset = sgi_ioc_reset; |
63 | sgioc->write = sgi_ioc_write; |
64 | } |
65 | |