1/* $NetBSD: pciconf_indirect.c,v 1.7 2021/01/06 08:17:46 rin Exp $ */ 2 3/*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tim Rightnour 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Generic PowerPC functions for talking to an indirect configuration style 34 * PCI Bridge. 35 */ 36 37#include <sys/cdefs.h> 38__KERNEL_RCSID(0, "$NetBSD: pciconf_indirect.c,v 1.7 2021/01/06 08:17:46 rin Exp $"); 39 40#define _POWERPC_BUS_DMA_PRIVATE 41 42#include <sys/types.h> 43#include <sys/param.h> 44#include <sys/time.h> 45#include <sys/systm.h> 46#include <sys/errno.h> 47#include <sys/device.h> 48#include <sys/bus.h> 49#include <sys/intr.h> 50 51#include <uvm/uvm_extern.h> 52 53#include <machine/pio.h> 54 55#include <dev/pci/pcivar.h> 56#include <dev/pci/pcireg.h> 57#include <dev/pci/pcidevs.h> 58 59#define PCI_MODE1_ENABLE 0x80000000UL 60 61void 62genppc_pci_indirect_attach_hook(device_t parent, device_t self, 63 struct pcibus_attach_args *pba) 64{ 65 66 if (pba->pba_bus != 0) 67 return; 68 69 printf(": indirect configuration space access"); 70} 71 72pcitag_t 73genppc_pci_indirect_make_tag(void *v, int bus, int device, int function) 74{ 75 pcitag_t tag; 76 77 if (bus >= 256 || device >= 32 || function >= 8) 78 panic("pci_make_tag: bad request"); 79 80 tag = PCI_MODE1_ENABLE | 81 (bus << 16) | (device << 11) | (function << 8); 82 return tag; 83} 84 85void 86genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, 87 int *fp) 88{ 89 90 if (bp != NULL) 91 *bp = (tag >> 16) & 0xff; 92 if (dp != NULL) 93 *dp = (tag >> 11) & 0x1f; 94 if (fp != NULL) 95 *fp = (tag >> 8) & 0x7; 96 return; 97} 98 99pcireg_t 100genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg) 101{ 102 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 103 pcireg_t data; 104 int s; 105 106 if ((unsigned int)reg >= PCI_CONF_SIZE) 107 return (pcireg_t) -1; 108 109 s = splhigh(); 110 out32rb(pc->pc_addr, tag | reg); 111 data = in32rb(pc->pc_data); 112 out32rb(pc->pc_addr, 0); 113 splx(s); 114 115 return data; 116} 117 118void 119genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 120{ 121 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 122 int s; 123 124 if ((unsigned int)reg >= PCI_CONF_SIZE) 125 return; 126 127 s = splhigh(); 128 out32rb(pc->pc_addr, tag | reg); 129 out32rb(pc->pc_data, data); 130 out32rb(pc->pc_addr, 0); 131 splx(s); 132} 133