/* $NetBSD: pci_1000a.c,v 1.33 2021/07/04 22:42:36 thorpej Exp $ */ /* * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is based on pci_kn20aa.c, written by Chris G. Demetriou at * Carnegie-Mellon University. Platform support for Noritake, Pintake, and * Corelle by Ross Harvey with copyright assignment by permission of Avalon * Computer Systems, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: pci_1000a.c,v 1.33 2021/07/04 22:42:36 thorpej Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include "sio.h" #if NSIO > 0 || NPCEB > 0 #include #endif #define PCI_NIRQ 32 #define PCI_STRAY_MAX 5 #define IMR2IRQ(bn) ((bn) - 1) #define IRQ2IMR(irq) ((irq) + 1) static bus_space_tag_t mystery_icu_iot; static bus_space_handle_t mystery_icu_ioh[2]; static int dec_1000a_intr_map(const struct pci_attach_args *, pci_intr_handle_t *); static void dec_1000a_enable_intr(pci_chipset_tag_t, int irq); static void dec_1000a_disable_intr(pci_chipset_tag_t, int irq); static void pci_1000a_imi(void); static void pci_1000a_pickintr(void *core, bus_space_tag_t iot, bus_space_tag_t memt, pci_chipset_tag_t pc) { mystery_icu_iot = iot; if (bus_space_map(iot, 0x54a, 2, 0, mystery_icu_ioh + 0) || bus_space_map(iot, 0x54c, 2, 0, mystery_icu_ioh + 1)) panic("pci_1000a_pickintr"); pc->pc_intr_v = core; pc->pc_intr_map = dec_1000a_intr_map; pc->pc_intr_string = alpha_pci_generic_intr_string; pc->pc_intr_evcnt = alpha_pci_generic_intr_evcnt; pc->pc_intr_establish = alpha_pci_generic_intr_establish; pc->pc_intr_disestablish = alpha_pci_generic_intr_disestablish; pc->pc_pciide_compat_intr_establish = NULL; pc->pc_intr_desc = "dec 1000a"; pc->pc_vecbase = 0x900; pc->pc_nirq = PCI_NIRQ; pc->pc_intr_enable = dec_1000a_enable_intr; pc->pc_intr_disable = dec_1000a_disable_intr; pci_1000a_imi(); alpha_pci_intr_alloc(pc, PCI_STRAY_MAX); #if NSIO > 0 || NPCEB > 0 sio_intr_setup(pc, iot); #endif } ALPHA_PCI_INTR_INIT(ST_DEC_1000A, pci_1000a_pickintr) int dec_1000a_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) { pcitag_t bustag = pa->pa_intrtag; int buspin = pa->pa_intrpin; pci_chipset_tag_t pc = pa->pa_pc; int imrbit, device = 0; /* XXX gcc */ /* * Get bit number in mystery ICU imr */ static const signed char imrmap[][4] = { # define IRQSPLIT(o) { (o), (o)+1, (o)+16, (o)+16+1 } # define IRQNONE { 0, 0, 0, 0 } /* 0 */ { 1, 0, 0, 0 }, /* Noritake and Pintake */ /* 1 */ IRQSPLIT(8), /* 2 */ IRQSPLIT(10), /* 3 */ IRQSPLIT(12), /* 4 */ IRQSPLIT(14), /* 5 */ { 1, 0, 0, 0 }, /* Corelle */ /* 6 */ { 10, 0, 0, 0 }, /* Corelle */ /* 7 */ IRQNONE, /* 8 */ { 1, 0, 0, 0 }, /* isp behind ppb */ /* 9 */ IRQNONE, /* 10 */ IRQNONE, /* 11 */ IRQSPLIT(2), /* 12 */ IRQSPLIT(4), /* 13 */ IRQSPLIT(6), /* 14 */ IRQSPLIT(8) /* Corelle */ }; if (buspin == 0) /* No IRQ used. */ return 1; if (!(1 <= buspin && buspin <= 4)) goto bad; pci_decompose_tag(pc, bustag, NULL, &device, NULL); if (0 <= device && device < sizeof imrmap / sizeof imrmap[0]) { if (device == 0) printf("dec_1000a_intr_map: ?! UNEXPECTED DEV 0\n"); imrbit = imrmap[device][buspin - 1]; if (imrbit) { alpha_pci_intr_handle_init(ihp, IMR2IRQ(imrbit), 0); return 0; } } bad: printf("dec_1000a_intr_map: can't map dev %d pin %d\n", device, buspin); return 1; } /* * Read and write the mystery ICU IMR registers */ #define IR(h) bus_space_read_2(mystery_icu_iot, mystery_icu_ioh[h], 0) #define IW(h, v) bus_space_write_2(mystery_icu_iot, mystery_icu_ioh[h], 0, (v)) /* * Enable and disable interrupts at the ICU level */ static void dec_1000a_enable_intr(pci_chipset_tag_t pc __unused, int irq) { int imrval = IRQ2IMR(irq); int i = imrval >= 16; IW(i, IR(i) | 1 << (imrval & 0xf)); } static void dec_1000a_disable_intr(pci_chipset_tag_t pc __unused, int irq) { int imrval = IRQ2IMR(irq); int i = imrval >= 16; IW(i, IR(i) & ~(1 << (imrval & 0xf))); } /* * Initialize mystery ICU */ static void pci_1000a_imi(void) { IW(0, IR(0) & 1); IW(1, IR(0) & 3); }