1/* $NetBSD: pci_1000.c,v 1.31 2021/07/04 22:42:36 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is based on pci_kn20aa.c, written by Chris G. Demetriou at 8 * Carnegie-Mellon University. Platform support for Mikasa and Mikasa/Pinnacle 9 * (Pinkasa) by Ross Harvey with copyright assignment by permission of Avalon 10 * Computer Systems, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34/* 35 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Author: Chris G. Demetriou 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 */ 60 61#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 62 63__KERNEL_RCSID(0, "$NetBSD: pci_1000.c,v 1.31 2021/07/04 22:42:36 thorpej Exp $"); 64 65#include <sys/types.h> 66#include <sys/param.h> 67#include <sys/time.h> 68#include <sys/systm.h> 69#include <sys/errno.h> 70#include <sys/device.h> 71#include <sys/syslog.h> 72 73#include <machine/autoconf.h> 74#include <machine/rpb.h> 75 76#include <dev/pci/pcireg.h> 77#include <dev/pci/pcivar.h> 78 79#include "sio.h" 80#if NSIO > 0 || NPCEB > 0 81#include <alpha/pci/siovar.h> 82#endif 83 84static bus_space_tag_t another_mystery_icu_iot; 85static bus_space_handle_t another_mystery_icu_ioh; 86 87static int dec_1000_intr_map(const struct pci_attach_args *, 88 pci_intr_handle_t *); 89 90#define PCI_NIRQ 16 91#define PCI_STRAY_MAX 5 92 93static void dec_1000_enable_intr(pci_chipset_tag_t, int irq); 94static void dec_1000_disable_intr(pci_chipset_tag_t, int irq); 95static void pci_1000_imi(void); 96 97static void 98pci_1000_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt, 99 pci_chipset_tag_t pc) 100{ 101 102 another_mystery_icu_iot = iot; 103 104 if (bus_space_map(iot, 0x536, 2, 0, &another_mystery_icu_ioh)) 105 panic("pci_1000_pickintr"); 106 107 pc->pc_intr_v = core; 108 pc->pc_intr_map = dec_1000_intr_map; 109 pc->pc_intr_string = alpha_pci_generic_intr_string; 110 pc->pc_intr_evcnt = alpha_pci_generic_intr_evcnt; 111 pc->pc_intr_establish = alpha_pci_generic_intr_establish; 112 pc->pc_intr_disestablish = alpha_pci_generic_intr_disestablish; 113 114 pc->pc_pciide_compat_intr_establish = NULL; 115 116 pc->pc_intr_desc = "dec 1000"; 117 pc->pc_vecbase = 0x900; 118 pc->pc_nirq = PCI_NIRQ; 119 120 pc->pc_intr_enable = dec_1000_enable_intr; 121 pc->pc_intr_disable = dec_1000_disable_intr; 122 123 pci_1000_imi(); 124 125 alpha_pci_intr_alloc(pc, PCI_STRAY_MAX); 126 127#if NSIO > 0 || NPCEB > 0 128 sio_intr_setup(pc, iot); 129#endif 130} 131ALPHA_PCI_INTR_INIT(ST_DEC_1000, pci_1000_pickintr) 132 133static int 134dec_1000_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 135{ 136 pcitag_t bustag = pa->pa_intrtag; 137 int buspin = pa->pa_intrpin; 138 pci_chipset_tag_t pc = pa->pa_pc; 139 int device = 0; /* XXX gcc */ 140 141 if (buspin == 0) /* No IRQ used. */ 142 return 1; 143 if (!(1 <= buspin && buspin <= 4)) 144 goto bad; 145 146 pci_decompose_tag(pc, bustag, NULL, &device, NULL); 147 148 switch(device) { 149 case 6: 150 if(buspin != 1) 151 break; 152 /* integrated ncr scsi */ 153 alpha_pci_intr_handle_init(ihp, 0xc, 0); 154 return 0; 155 case 11: 156 case 12: 157 case 13: 158 alpha_pci_intr_handle_init(ihp, 159 (device - 11) * 4 + buspin - 1, 0); 160 return 0; 161 } 162 163bad: printf("dec_1000_intr_map: can't map dev %d pin %d\n", device, buspin); 164 return 1; 165} 166 167/* 168 * Read and write the mystery ICU IMR registers 169 */ 170 171#define IR() bus_space_read_2(another_mystery_icu_iot, \ 172 another_mystery_icu_ioh, 0) 173 174#define IW(v) bus_space_write_2(another_mystery_icu_iot, \ 175 another_mystery_icu_ioh, 0, (v)) 176 177/* 178 * Enable and disable interrupts at the ICU level 179 */ 180 181static void 182dec_1000_enable_intr(pci_chipset_tag_t pc __unused, int irq) 183{ 184 IW(IR() | 1 << irq); 185} 186 187static void 188dec_1000_disable_intr(pci_chipset_tag_t pc __unused, int irq) 189{ 190 IW(IR() & ~(1 << irq)); 191} 192 193/* 194 * Initialize mystery ICU 195 */ 196static void 197pci_1000_imi(void) 198{ 199 IW(0); /* XXX ?? */ 200} 201