1 /* $NetBSD: pciconf_indirect.c,v 1.6 2015/10/02 05:22:52 msaitoh 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 1.6 2015/10/02 05:22:52 msaitoh 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 #if NISA > 0 56 #include <dev/isa/isavar.h> 57 #endif 58 59 #include <dev/pci/pcivar.h> 60 #include <dev/pci/pcireg.h> 61 #include <dev/pci/pcidevs.h> 62 63 #define PCI_MODE1_ENABLE 0x80000000UL 64 65 void 66 genppc_pci_indirect_attach_hook(device_t parent, device_t self, 67 struct pcibus_attach_args *pba) 68 { 69 70 if (pba->pba_bus != 0) 71 return; 72 73 printf(": indirect configuration space access"); 74 } 75 76 pcitag_t 77 genppc_pci_indirect_make_tag(void *v, int bus, int device, int function) 78 { 79 pcitag_t tag; 80 81 if (bus >= 256 || device >= 32 || function >= 8) 82 panic("pci_make_tag: bad request"); 83 84 tag = PCI_MODE1_ENABLE | 85 (bus << 16) | (device << 11) | (function << 8); 86 return tag; 87 } 88 89 void 90 genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, 91 int *fp) 92 { 93 94 if (bp != NULL) 95 *bp = (tag >> 16) & 0xff; 96 if (dp != NULL) 97 *dp = (tag >> 11) & 0x1f; 98 if (fp != NULL) 99 *fp = (tag >> 8) & 0x7; 100 return; 101 } 102 103 pcireg_t 104 genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg) 105 { 106 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 107 pcireg_t data; 108 int s; 109 110 if ((unsigned int)reg >= PCI_CONF_SIZE) 111 return (pcireg_t) -1; 112 113 s = splhigh(); 114 out32rb(pc->pc_addr, tag | reg); 115 data = in32rb(pc->pc_data); 116 out32rb(pc->pc_addr, 0); 117 splx(s); 118 119 return data; 120 } 121 122 void 123 genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 124 { 125 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 126 int s; 127 128 if ((unsigned int)reg >= PCI_CONF_SIZE) 129 return; 130 131 s = splhigh(); 132 out32rb(pc->pc_addr, tag | reg); 133 out32rb(pc->pc_data, data); 134 out32rb(pc->pc_addr, 0); 135 splx(s); 136 } 137