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 
17 struct hpc3_regs *hpc3c0, *hpc3c1;
18 
19 EXPORT_SYMBOL(hpc3c0);
20 EXPORT_SYMBOL(hpc3c1);
21 
22 struct sgioc_regs *sgioc;
23 
24 EXPORT_SYMBOL(sgioc);
25 
26 /* We need software copies of these because they are write only. */
27 u8 sgi_ioc_reset, sgi_ioc_write;
28 
29 extern char *system_type;
30 
sgihpc_init(void)31 void __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