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