cardbus_exrom.c revision 1.2.2.2
1 1.2.2.2 fvdl /* $NetBSD: cardbus_exrom.c,v 1.2.2.2 1999/11/15 00:40:17 fvdl Exp $ */ 2 1.2.2.2 fvdl 3 1.2.2.2 fvdl /* 4 1.2.2.2 fvdl * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 1.2.2.2 fvdl * All rights reserved. 6 1.2.2.2 fvdl * 7 1.2.2.2 fvdl * This code is derived from software contributed to 8 1.2.2.2 fvdl * The NetBSD Foundation by Johan Danielsson. 9 1.2.2.2 fvdl * 10 1.2.2.2 fvdl * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 fvdl * modification, are permitted provided that the following conditions 12 1.2.2.2 fvdl * are met: 13 1.2.2.2 fvdl * 14 1.2.2.2 fvdl * 1. Redistributions of source code must retain the above copyright 15 1.2.2.2 fvdl * notice, this list of conditions and the following disclaimer. 16 1.2.2.2 fvdl * 17 1.2.2.2 fvdl * 2. Redistributions in binary form must reproduce the above copyright 18 1.2.2.2 fvdl * notice, this list of conditions and the following disclaimer in the 19 1.2.2.2 fvdl * documentation and/or other materials provided with the distribution. 20 1.2.2.2 fvdl * 21 1.2.2.2 fvdl * 3. Neither the name of The NetBSD Foundation nor the names of its 22 1.2.2.2 fvdl * contributors may be used to endorse or promote products derived 23 1.2.2.2 fvdl * from this software without specific prior written permission. 24 1.2.2.2 fvdl * 25 1.2.2.2 fvdl * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 1.2.2.2 fvdl * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 1.2.2.2 fvdl * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 1.2.2.2 fvdl * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 1.2.2.2 fvdl * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 1.2.2.2 fvdl * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 1.2.2.2 fvdl * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 1.2.2.2 fvdl * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 1.2.2.2 fvdl * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 1.2.2.2 fvdl * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 1.2.2.2 fvdl * POSSIBILITY OF SUCH DAMAGE. 36 1.2.2.2 fvdl */ 37 1.2.2.2 fvdl 38 1.2.2.2 fvdl #include <sys/param.h> 39 1.2.2.2 fvdl #include <sys/systm.h> 40 1.2.2.2 fvdl #include <sys/queue.h> 41 1.2.2.2 fvdl #include <sys/malloc.h> 42 1.2.2.2 fvdl 43 1.2.2.2 fvdl #include <machine/bus.h> 44 1.2.2.2 fvdl 45 1.2.2.2 fvdl #include <dev/cardbus/cardbus_exrom.h> 46 1.2.2.2 fvdl 47 1.2.2.2 fvdl #define READ_INT16(T, H, O) \ 48 1.2.2.2 fvdl (bus_space_read_1((T), (H), (O)) | (bus_space_read_1((T), (H), (O) + 1) << 8)) 49 1.2.2.2 fvdl 50 1.2.2.2 fvdl /* A PCI ROM is divided into a number of images. Each image has two 51 1.2.2.2 fvdl * data structures, a header located at the start of the image, and a 52 1.2.2.2 fvdl * `data structure' at some offset into it. 53 1.2.2.2 fvdl * 54 1.2.2.2 fvdl * The header is a 26 byte structure: 55 1.2.2.2 fvdl * 56 1.2.2.2 fvdl * Offset Length Description 57 1.2.2.2 fvdl * 0x00 1 signature byte 1 (0x55) 58 1.2.2.2 fvdl * 0x01 1 signature byte 2 (0xAA) 59 1.2.2.2 fvdl * 0x02 22 processor architecture data 60 1.2.2.2 fvdl * 0x18 2 pointer to the data structure 61 1.2.2.2 fvdl * 62 1.2.2.2 fvdl * The data structure is a 24 byte structure: 63 1.2.2.2 fvdl * 64 1.2.2.2 fvdl * Offset Length Description 65 1.2.2.2 fvdl * 0x00 4 signature (PCIR) 66 1.2.2.2 fvdl * 0x04 2 vendor id 67 1.2.2.2 fvdl * 0x06 2 device id 68 1.2.2.2 fvdl * 0x08 2 reserved 69 1.2.2.2 fvdl * 0x0A 2 data structure length 70 1.2.2.2 fvdl * 0x0C 1 data structure revision (0) 71 1.2.2.2 fvdl * 0x0D 3 class code 72 1.2.2.2 fvdl * 0x10 2 image length (in 512 byte blocks) 73 1.2.2.2 fvdl * 0x12 2 code revision level 74 1.2.2.2 fvdl * 0x14 1 code type 75 1.2.2.2 fvdl * 0x15 1 indicator (bit 7 indicates final image) 76 1.2.2.2 fvdl * 0x16 2 reserved 77 1.2.2.2 fvdl * 78 1.2.2.2 fvdl */ 79 1.2.2.2 fvdl 80 1.2.2.2 fvdl /* 81 1.2.2.2 fvdl * Scan through a PCI expansion ROM, and create subregions for each 82 1.2.2.2 fvdl * ROM image. This function assumes that the ROM is mapped at 83 1.2.2.2 fvdl * (tag,handle), and that the expansion ROM address decoder is 84 1.2.2.2 fvdl * enabled. The PCI specification requires that no other BAR should 85 1.2.2.2 fvdl * be accessed while the ROM is enabled, so interrupts should be 86 1.2.2.2 fvdl * disabled. 87 1.2.2.2 fvdl */ 88 1.2.2.2 fvdl 89 1.2.2.2 fvdl int 90 1.2.2.2 fvdl cardbus_read_exrom(romt, romh, head) 91 1.2.2.2 fvdl bus_space_tag_t romt; 92 1.2.2.2 fvdl bus_space_handle_t romh; 93 1.2.2.2 fvdl struct cardbus_rom_image_head *head; 94 1.2.2.2 fvdl { 95 1.2.2.2 fvdl static const char __func__[] = "cardbus_read_exrom"; 96 1.2.2.2 fvdl 97 1.2.2.2 fvdl size_t addr = 0; /* offset of current rom image */ 98 1.2.2.2 fvdl size_t dataptr; 99 1.2.2.2 fvdl unsigned int rom_image = 0; 100 1.2.2.2 fvdl 101 1.2.2.2 fvdl SIMPLEQ_INIT(head); 102 1.2.2.2 fvdl do { 103 1.2.2.2 fvdl size_t image_size; 104 1.2.2.2 fvdl struct cardbus_rom_image *image; 105 1.2.2.2 fvdl 106 1.2.2.2 fvdl if(READ_INT16(romt, romh, addr + CARDBUS_EXROM_SIGNATURE) != 0xaa55) { 107 1.2.2.2 fvdl printf("%s: bad header signature in ROM image %u\n", 108 1.2.2.2 fvdl __func__, rom_image); 109 1.2.2.2 fvdl return 1; 110 1.2.2.2 fvdl } 111 1.2.2.2 fvdl dataptr = addr + READ_INT16(romt, romh, addr + CARDBUS_EXROM_DATA_PTR); 112 1.2.2.2 fvdl /* get the ROM image size, in blocks */ 113 1.2.2.2 fvdl image_size = READ_INT16(romt, romh, 114 1.2.2.2 fvdl dataptr + CARDBUS_EXROM_DATA_IMAGE_LENGTH); 115 1.2.2.2 fvdl if(image_size == 0) 116 1.2.2.2 fvdl /* XXX some ROMs seem to have this as zero, can we assume 117 1.2.2.2 fvdl this means 1 block? */ 118 1.2.2.2 fvdl image_size = 1; 119 1.2.2.2 fvdl image_size <<= 9; 120 1.2.2.2 fvdl image = malloc(sizeof(*image), M_DEVBUF, M_NOWAIT); 121 1.2.2.2 fvdl image->rom_image = rom_image; 122 1.2.2.2 fvdl image->image_size = image_size; 123 1.2.2.2 fvdl image->romt = romt; 124 1.2.2.2 fvdl if(bus_space_subregion(romt, romh, addr, 125 1.2.2.2 fvdl image_size, &image->romh)) { 126 1.2.2.2 fvdl printf("%s: bus_space_subregion failed", __func__); 127 1.2.2.2 fvdl free(image, M_DEVBUF); 128 1.2.2.2 fvdl return 1; 129 1.2.2.2 fvdl } 130 1.2.2.2 fvdl SIMPLEQ_INSERT_TAIL(head, image, next); 131 1.2.2.2 fvdl addr += image_size; 132 1.2.2.2 fvdl rom_image++; 133 1.2.2.2 fvdl } while ((bus_space_read_1(romt, romh, 134 1.2.2.2 fvdl dataptr + CARDBUS_EXROM_DATA_INDICATOR) & 0x80) == 0); 135 1.2.2.2 fvdl return 0; 136 1.2.2.2 fvdl } 137 1.2.2.2 fvdl 138 1.2.2.2 fvdl 139 1.2.2.2 fvdl #if 0 140 1.2.2.2 fvdl struct cardbus_exrom_data_structure { 141 1.2.2.2 fvdl char signature[4]; 142 1.2.2.2 fvdl cardbusreg_t id; /* vendor & device id */ 143 1.2.2.2 fvdl u_int16_t structure_length; 144 1.2.2.2 fvdl u_int8_t structure_revision; 145 1.2.2.2 fvdl cardbusreg_t class; /* class code in upper 24 bits */ 146 1.2.2.2 fvdl u_int16_t image_length; 147 1.2.2.2 fvdl u_int16_t data_revision; 148 1.2.2.2 fvdl u_int8_t code_type; 149 1.2.2.2 fvdl u_int8_t indicator; 150 1.2.2.2 fvdl }; 151 1.2.2.2 fvdl 152 1.2.2.2 fvdl pci_exrom_parse_data_structure(bus_space_tag_t tag, 153 1.2.2.2 fvdl bus_space_handle_t handle, 154 1.2.2.2 fvdl struct pci_exrom_data_structure *ds) 155 1.2.2.2 fvdl { 156 1.2.2.2 fvdl unsigned char hdr[16]; 157 1.2.2.2 fvdl bus_space_read_region_1(tag, handle, dataptr, hdr, sizeof(hdr)); 158 1.2.2.2 fvdl memcpy(header->signature, hdr + PCI_EXROM_DATA_SIGNATURE, 4); 159 1.2.2.2 fvdl #define LEINT16(B, O) ((B)[(O)] | ((B)[(O) + 1] << 8)) 160 1.2.2.2 fvdl header->id = LEINT16(hdr, PCI_EXROM_DATA_VENDOR_ID) | 161 1.2.2.2 fvdl (LEINT16(hdr, PCI_EXROM_DATA_DEVICE_ID) << 16); 162 1.2.2.2 fvdl header->structure_length = LEINT16(hdr, PCI_EXROM_DATA_LENGTH); 163 1.2.2.2 fvdl header->structure_rev = hdr[PCI_EXROM_DATA_REV]; 164 1.2.2.2 fvdl header->class = (hdr[PCI_EXROM_DATA_CLASS_CODE] << 8) | 165 1.2.2.2 fvdl (hdr[PCI_EXROM_DATA_CLASS_CODE + 1] << 16) | 166 1.2.2.2 fvdl (hdr[PCI_EXROM_DATA_CLASS_CODE + 2] << 24); 167 1.2.2.2 fvdl header->image_length = LEINT16(hdr, PCI_EXROM_DATA_IMAGE_LENGTH) << 16; 168 1.2.2.2 fvdl header->data_revision = LEINT16(hdr, PCI_EXROM_DATA_DATA_REV); 169 1.2.2.2 fvdl header->code_type = hdr[PCI_EXROM_DATA_CODE_TYPE]; 170 1.2.2.2 fvdl header->indicator = hdr[PCI_EXROM_DATA_INDICATOR]; 171 1.2.2.2 fvdl length = min(length, header->image_length - 0x18 - offset); 172 1.2.2.2 fvdl bus_space_read_region_1(tag, handle, dataptr + 0x18 + offset, 173 1.2.2.2 fvdl buf, length); 174 1.2.2.2 fvdl ret = length; 175 1.2.2.2 fvdl } 176 1.2.2.2 fvdl #endif 177
Indexes created Tue Oct 21 19:09:51 GMT 2025