1 /* $NetBSD: pciconf_indirect.c,v 1.2 2007/10/17 19:56:44 garbled 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Generic PowerPC functions for talking to an indirect configuration style 41 * PCI Bridge. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: pciconf_indirect.c,v 1.2 2007/10/17 19:56:44 garbled Exp $"); 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/time.h> 50 #include <sys/systm.h> 51 #include <sys/errno.h> 52 #include <sys/device.h> 53 54 #include <uvm/uvm_extern.h> 55 56 #define _POWERPC_BUS_DMA_PRIVATE 57 #include <machine/bus.h> 58 #include <machine/intr.h> 59 #include <machine/pio.h> 60 61 #if NISA > 0 62 #include <dev/isa/isavar.h> 63 #endif 64 65 #include <dev/pci/pcivar.h> 66 #include <dev/pci/pcireg.h> 67 #include <dev/pci/pcidevs.h> 68 69 #define PCI_MODE1_ENABLE 0x80000000UL 70 71 void 72 genppc_pci_indirect_attach_hook(struct device *parent, struct device *self, 73 struct pcibus_attach_args *pba) 74 { 75 76 if (pba->pba_bus != 0) 77 return; 78 79 printf(": indirect configuration space access"); 80 } 81 82 pcitag_t 83 genppc_pci_indirect_make_tag(void *v, int bus, int device, int function) 84 { 85 pcitag_t tag; 86 87 if (bus >= 256 || device >= 32 || function >= 8) 88 panic("pci_make_tag: bad request"); 89 90 tag = PCI_MODE1_ENABLE | 91 (bus << 16) | (device << 11) | (function << 8); 92 return tag; 93 } 94 95 void 96 genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp, 97 int *fp) 98 { 99 100 if (bp != NULL) 101 *bp = (tag >> 16) & 0xff; 102 if (dp != NULL) 103 *dp = (tag >> 11) & 0x1f; 104 if (fp != NULL) 105 *fp = (tag >> 8) & 0x7; 106 return; 107 } 108 109 pcireg_t 110 genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg) 111 { 112 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 113 pcireg_t data; 114 int s; 115 116 s = splhigh(); 117 out32rb(pc->pc_addr, tag | reg); 118 data = in32rb(pc->pc_data); 119 out32rb(pc->pc_addr, 0); 120 splx(s); 121 122 return data; 123 } 124 125 void 126 genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data) 127 { 128 pci_chipset_tag_t pc = (pci_chipset_tag_t)v; 129 int s; 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