1 /* $NetBSD: pciconf_indirect.c,v 1.3 2008/04/28 20:23:32 martin 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 1.3 2008/04/28 20:23:32 martin Exp $"); 39 40 #include <sys/types.h> 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/systm.h> 44 #include <sys/errno.h> 45 #include <sys/device.h> 46 47 #include <uvm/uvm_extern.h> 48 49 #define _POWERPC_BUS_DMA_PRIVATE 50 #include <machine/bus.h> 51 #include <machine/intr.h> 52 #include <machine/pio.h> 53 54 #if NISA > 0 55 #include <dev/isa/isavar.h> 56 #endif 57 58 #include <dev/pci/pcivar.h> 59 #include <dev/pci/pcireg.h> 60 #include <dev/pci/pcidevs.h> 61 62 #define PCI_MODE1_ENABLE 0x80000000UL 63 64 void 65 genppc_pci_indirect_attach_hook(struct device *parent, struct device *self, 66 struct pcibus_attach_args *pba) 67 { 68 69 if (pba->pba_bus != 0) 70 return; 71 72 printf(": indirect configuration space access"); 73 } 74 75 pcitag_t 76 genppc_pci_indirect_make_tag(void *v, int bus, int device, int function) 77 { 78 pcitag_t tag; 79 80 if (bus >= 256 || device >= 32 || function >= 8) 81 panic("pci_make_tag: bad request"); 82 83 tag = PCI_MODE1_ENABLE | 84 (bus << 16) | (device << 11) | (function << 8); 85 return tag; 86 } 87 88 void 89 genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, 90 int *fp) 91 { 92 93 if (bp != NULL) 94 *bp = (tag >> 16) & 0xff; 95 if (dp != NULL) 96 *dp = (tag >> 11) & 0x1f; 97 if (fp != NULL) 98 *fp = (tag >> 8) & 0x7; 99 return; 100 } 101 102 pcireg_t 103 genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg) 104 { 105 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 106 pcireg_t data; 107 int s; 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 } 117 118 void 119 genppc_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 s = splhigh(); 125 out32rb(pc->pc_addr, tag | reg); 126 out32rb(pc->pc_data, data); 127 out32rb(pc->pc_addr, 0); 128 splx(s); 129 } 130