1/* ********************************************************************* 2 * Broadcom Common Firmware Environment (CFE) 3 * 4 * Board device initialization File: lausanne_pci.c 5 * 6 * This is the part of the board support package for boards 7 * that support PCI. It describes the board-specific slots/devices 8 * and wiring thereof. 9 * 10 ********************************************************************* 11 * 12 * Copyright 2000,2001,2002,2003 13 * Broadcom Corporation. All rights reserved. 14 * 15 * This software is furnished under license and may be used and 16 * copied only in accordance with the following terms and 17 * conditions. Subject to these conditions, you may download, 18 * copy, install, use, modify and distribute modified or unmodified 19 * copies of this software in source and/or binary form. No title 20 * or ownership is transferred hereby. 21 * 22 * 1) Any source code used, modified or distributed must reproduce 23 * and retain this copyright notice and list of conditions 24 * as they appear in the source file. 25 * 26 * 2) No right is granted to use any trade name, trademark, or 27 * logo of Broadcom Corporation. The "Broadcom Corporation" 28 * name may not be used to endorse or promote products derived 29 * from this software without the prior written permission of 30 * Broadcom Corporation. 31 * 32 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR 33 * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED 34 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 35 * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT 36 * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN 37 * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, 38 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 39 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 40 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 41 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 42 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 43 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF 44 * THE POSSIBILITY OF SUCH DAMAGE. 45 ********************************************************************* */ 46 47#include "lib_types.h" 48 49#include "pcireg.h" 50#include "pcivar.h" 51#include "pci_internal.h" 52 53/* PCI interrupt mapping on the Lausanne board: 54 Device ids 5, 6, 7 and 8 are implemented as PCI connectors, 55 and there are no on-board devices. 56 57 Slot IDSEL DevID INT{A,B,C,D} shift 58 (PHB) - 0 {A,-,-,-} 0 59 (LHB) - 1 not connected 60 0 16 5 {A,B,C,D} 0 (identity) 61 1 17 6 {B,C,D,A} 1 (A->B, B->C, C->D, D->A) 62 2 18 7 {C,D,A,B} 2 (A->C, B->D, C->A, D->B) 63 3 19 8 {D,A,B,C} 3 (A->D, B->A, C->B, D->C) 64 65 Device 1 is the LDT host bridge, which is disabled on this board. 66*/ 67 68extern int _pciverbose; 69 70/* Return the base shift of a slot or device on the motherboard. 71 This is board specific, for the Lausanne only. */ 72uint8_t 73pci_int_shift_0(pcitag_t tag) 74{ 75 int bus, device; 76 77 pci_break_tag(tag, NULL, &bus, &device, NULL); 78 79 if (bus != 0) 80 return 0; 81 switch (device) { 82 case 0: 83 return 0; 84 case 5: case 6: case 7: case 8: 85 return ((device - 5) % 4); 86 default: 87 return 0; 88 } 89} 90 91/* Return the mapping of a Lausanne device/function interrupt to an 92 interrupt line. For the SB-1250, return 1-4 to indicate the 93 pci_inta - pci_intd inputs to the interrupt mapper, respectively, 94 or 0 if there is no mapping. This is board specific, and the 95 version below is for Lausanne only. */ 96uint8_t 97pci_int_map_0(pcitag_t tag) 98{ 99 pcireg_t data; 100 int pin, bus, device; 101 102 data = pci_conf_read(tag, PCI_BPARAM_INTERRUPT_REG); 103 pin = PCI_INTERRUPT_PIN(data); 104 if (pin == 0) { 105 /* No IRQ used. */ 106 return 0; 107 } 108 if (pin > 4) { 109 if (_pciverbose >= 1) 110 pci_tagprintf(tag, "pci_map_int: bad interrupt pin %d\n", pin); 111 return 0; 112 } 113 114 pci_break_tag(tag, NULL, &bus, &device, NULL); 115 116 if (bus != 0) 117 return 0; 118 119 switch (device) { 120 case 0: 121 case 5: case 6: case 7: case 8: 122 return (((pin - 1) + pci_int_shift_0(tag)) % 4) + 1; 123 default: 124 return 0; 125 } 126} 127