bktr_mem.c revision 1.1.1.1.2.2
1 1.1.1.1.2.2 bouyer /* $NetBSD: bktr_mem.c,v 1.1.1.1.2.2 2000/11/22 16:04:30 bouyer Exp $ */ 2 1.1.1.1.2.2 bouyer 3 1.1.1.1.2.2 bouyer /* FreeBSD: src/sys/dev/bktr/bktr_mem.c,v 1.4 2000/09/11 12:23:50 roger Exp */ 4 1.1.1.1.2.2 bouyer 5 1.1.1.1.2.2 bouyer /* 6 1.1.1.1.2.2 bouyer * This is prt of the Driver for Video Capture Cards (Frame grabbers) 7 1.1.1.1.2.2 bouyer * and TV Tuner cards using the Brooktree Bt848, Bt848A, Bt849A, Bt878, Bt879 8 1.1.1.1.2.2 bouyer * chipset. 9 1.1.1.1.2.2 bouyer * Copyright Roger Hardiman. 10 1.1.1.1.2.2 bouyer * 11 1.1.1.1.2.2 bouyer * bktr_mem : This kernel module allows us to keep our allocated 12 1.1.1.1.2.2 bouyer * contiguous memory for the video buffer, DMA programs and VBI data 13 1.1.1.1.2.2 bouyer * while the main bktr driver is unloaded and reloaded. 14 1.1.1.1.2.2 bouyer * This avoids the problem of trying to allocate contiguous each 15 1.1.1.1.2.2 bouyer * time the bktr driver is loaded. 16 1.1.1.1.2.2 bouyer */ 17 1.1.1.1.2.2 bouyer 18 1.1.1.1.2.2 bouyer /* 19 1.1.1.1.2.2 bouyer * 1. Redistributions of source code must retain the 20 1.1.1.1.2.2 bouyer * Copyright (c) 2000 Roger Hardiman 21 1.1.1.1.2.2 bouyer * All rights reserved. 22 1.1.1.1.2.2 bouyer * 23 1.1.1.1.2.2 bouyer * Redistribution and use in source and binary forms, with or without 24 1.1.1.1.2.2 bouyer * modification, are permitted provided that the following conditions 25 1.1.1.1.2.2 bouyer * are met: 26 1.1.1.1.2.2 bouyer * 1. Redistributions of source code must retain the above copyright 27 1.1.1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer. 28 1.1.1.1.2.2 bouyer * 2. Redistributions in binary form must reproduce the above copyright 29 1.1.1.1.2.2 bouyer * notice, this list of conditions and the following disclaimer in the 30 1.1.1.1.2.2 bouyer * documentation and/or other materials provided with the distribution. 31 1.1.1.1.2.2 bouyer * 3. All advertising materials mentioning features or use of this software 32 1.1.1.1.2.2 bouyer * must display the following acknowledgement: 33 1.1.1.1.2.2 bouyer * This product includes software developed by Roger Hardiman 34 1.1.1.1.2.2 bouyer * 4. The name of the author may not be used to endorse or promote products 35 1.1.1.1.2.2 bouyer * derived from this software without specific prior written permission. 36 1.1.1.1.2.2 bouyer * 37 1.1.1.1.2.2 bouyer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 38 1.1.1.1.2.2 bouyer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 39 1.1.1.1.2.2 bouyer * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 1.1.1.1.2.2 bouyer * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 41 1.1.1.1.2.2 bouyer * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 42 1.1.1.1.2.2 bouyer * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 43 1.1.1.1.2.2 bouyer * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 1.1.1.1.2.2 bouyer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 1.1.1.1.2.2 bouyer * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 46 1.1.1.1.2.2 bouyer * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 47 1.1.1.1.2.2 bouyer * POSSIBILITY OF SUCH DAMAGE. 48 1.1.1.1.2.2 bouyer */ 49 1.1.1.1.2.2 bouyer 50 1.1.1.1.2.2 bouyer 51 1.1.1.1.2.2 bouyer #include <sys/param.h> 52 1.1.1.1.2.2 bouyer #include <sys/kernel.h> 53 1.1.1.1.2.2 bouyer #include <stdio.h> 54 1.1.1.1.2.2 bouyer #include <string.h> 55 1.1.1.1.2.2 bouyer #include <dev/bktr/bktr_mem.h> 56 1.1.1.1.2.2 bouyer 57 1.1.1.1.2.2 bouyer struct memory_pointers { 58 1.1.1.1.2.2 bouyer int addresses_stored; 59 1.1.1.1.2.2 bouyer vm_offset_t dma_prog; 60 1.1.1.1.2.2 bouyer vm_offset_t odd_dma_prog; 61 1.1.1.1.2.2 bouyer vm_offset_t vbidata; 62 1.1.1.1.2.2 bouyer vm_offset_t vbibuffer; 63 1.1.1.1.2.2 bouyer vm_offset_t buf; 64 1.1.1.1.2.2 bouyer } memory_pointers; 65 1.1.1.1.2.2 bouyer 66 1.1.1.1.2.2 bouyer static struct memory_pointers memory_list[BKTR_MEM_MAX_DEVICES]; 67 1.1.1.1.2.2 bouyer 68 1.1.1.1.2.2 bouyer /*************************************************************/ 69 1.1.1.1.2.2 bouyer 70 1.1.1.1.2.2 bouyer static int 71 1.1.1.1.2.2 bouyer bktr_mem_modevent(module_t mod, int type, void *unused){ 72 1.1.1.1.2.2 bouyer 73 1.1.1.1.2.2 bouyer switch (type) { 74 1.1.1.1.2.2 bouyer case MOD_LOAD: 75 1.1.1.1.2.2 bouyer { 76 1.1.1.1.2.2 bouyer printf("bktr_mem: memory holder loaded\n"); 77 1.1.1.1.2.2 bouyer /* 78 1.1.1.1.2.2 bouyer * bzero causes a panic. 79 1.1.1.1.2.2 bouyer bzero((caddr_t)memory_list, sizeof(memory_list)); 80 1.1.1.1.2.2 bouyer * So use a simple for loop for now. 81 1.1.1.1.2.2 bouyer */ 82 1.1.1.1.2.2 bouyer {int x; 83 1.1.1.1.2.2 bouyer unsigned char *d = (unsigned char *)memory_list; 84 1.1.1.1.2.2 bouyer for (x=0; x< sizeof(memory_list); x++) { 85 1.1.1.1.2.2 bouyer d[x]=0; 86 1.1.1.1.2.2 bouyer } 87 1.1.1.1.2.2 bouyer } 88 1.1.1.1.2.2 bouyer return 0; 89 1.1.1.1.2.2 bouyer } 90 1.1.1.1.2.2 bouyer case MOD_UNLOAD: 91 1.1.1.1.2.2 bouyer { 92 1.1.1.1.2.2 bouyer printf("bktr_mem: memory holder cannot be unloaded\n"); 93 1.1.1.1.2.2 bouyer return EBUSY; 94 1.1.1.1.2.2 bouyer } 95 1.1.1.1.2.2 bouyer default: 96 1.1.1.1.2.2 bouyer break; 97 1.1.1.1.2.2 bouyer } 98 1.1.1.1.2.2 bouyer return 0; 99 1.1.1.1.2.2 bouyer }; 100 1.1.1.1.2.2 bouyer 101 1.1.1.1.2.2 bouyer /*************************************************************/ 102 1.1.1.1.2.2 bouyer 103 1.1.1.1.2.2 bouyer int 104 1.1.1.1.2.2 bouyer bktr_has_stored_addresses(int unit) { 105 1.1.1.1.2.2 bouyer 106 1.1.1.1.2.2 bouyer if ((unit < 0) || (unit >= BKTR_MEM_MAX_DEVICES)) { 107 1.1.1.1.2.2 bouyer printf("bktr_mem: Unit number %d invalid\n",unit); 108 1.1.1.1.2.2 bouyer return 0; 109 1.1.1.1.2.2 bouyer } 110 1.1.1.1.2.2 bouyer 111 1.1.1.1.2.2 bouyer return memory_list[unit].addresses_stored; 112 1.1.1.1.2.2 bouyer } 113 1.1.1.1.2.2 bouyer 114 1.1.1.1.2.2 bouyer /*************************************************************/ 115 1.1.1.1.2.2 bouyer 116 1.1.1.1.2.2 bouyer void 117 1.1.1.1.2.2 bouyer bktr_store_address(int unit, int type, vm_offset_t addr) { 118 1.1.1.1.2.2 bouyer 119 1.1.1.1.2.2 bouyer if ((unit < 0) || (unit >= BKTR_MEM_MAX_DEVICES)) { 120 1.1.1.1.2.2 bouyer printf("bktr_mem: Unit number %d invalid for memory type %d, address 0x%x\n" 121 1.1.1.1.2.2 bouyer ,unit,type,addr); 122 1.1.1.1.2.2 bouyer return; 123 1.1.1.1.2.2 bouyer } 124 1.1.1.1.2.2 bouyer 125 1.1.1.1.2.2 bouyer switch (type) { 126 1.1.1.1.2.2 bouyer case BKTR_MEM_DMA_PROG: memory_list[unit].dma_prog = addr; 127 1.1.1.1.2.2 bouyer memory_list[unit].addresses_stored = 1; 128 1.1.1.1.2.2 bouyer break; 129 1.1.1.1.2.2 bouyer case BKTR_MEM_ODD_DMA_PROG: memory_list[unit].odd_dma_prog = addr; 130 1.1.1.1.2.2 bouyer memory_list[unit].addresses_stored = 1; 131 1.1.1.1.2.2 bouyer break; 132 1.1.1.1.2.2 bouyer case BKTR_MEM_VBIDATA: memory_list[unit].vbidata = addr; 133 1.1.1.1.2.2 bouyer memory_list[unit].addresses_stored = 1; 134 1.1.1.1.2.2 bouyer break; 135 1.1.1.1.2.2 bouyer case BKTR_MEM_VBIBUFFER: memory_list[unit].vbibuffer = addr; 136 1.1.1.1.2.2 bouyer memory_list[unit].addresses_stored = 1; 137 1.1.1.1.2.2 bouyer break; 138 1.1.1.1.2.2 bouyer case BKTR_MEM_BUF: memory_list[unit].buf = addr; 139 1.1.1.1.2.2 bouyer memory_list[unit].addresses_stored = 1; 140 1.1.1.1.2.2 bouyer break; 141 1.1.1.1.2.2 bouyer default: printf("bktr_mem: Invalid memory type %d for bktr%d, address 0x%xn", 142 1.1.1.1.2.2 bouyer type,unit,addr); 143 1.1.1.1.2.2 bouyer break; 144 1.1.1.1.2.2 bouyer } 145 1.1.1.1.2.2 bouyer } 146 1.1.1.1.2.2 bouyer 147 1.1.1.1.2.2 bouyer /*************************************************************/ 148 1.1.1.1.2.2 bouyer 149 1.1.1.1.2.2 bouyer vm_offset_t 150 1.1.1.1.2.2 bouyer bktr_retrieve_address(int unit, int type) { 151 1.1.1.1.2.2 bouyer 152 1.1.1.1.2.2 bouyer if ((unit < 0) || (unit >= BKTR_MEM_MAX_DEVICES)) { 153 1.1.1.1.2.2 bouyer printf("bktr_mem: Unit number %d too large for memory type %d\n",unit,type); 154 1.1.1.1.2.2 bouyer return NULL; 155 1.1.1.1.2.2 bouyer } 156 1.1.1.1.2.2 bouyer switch (type) { 157 1.1.1.1.2.2 bouyer case BKTR_MEM_DMA_PROG: return memory_list[unit].dma_prog; 158 1.1.1.1.2.2 bouyer case BKTR_MEM_ODD_DMA_PROG: return memory_list[unit].odd_dma_prog; 159 1.1.1.1.2.2 bouyer case BKTR_MEM_VBIDATA: return memory_list[unit].vbidata; 160 1.1.1.1.2.2 bouyer case BKTR_MEM_VBIBUFFER: return memory_list[unit].vbibuffer; 161 1.1.1.1.2.2 bouyer case BKTR_MEM_BUF: return memory_list[unit].buf; 162 1.1.1.1.2.2 bouyer default: printf("bktr_mem: Invalid memory type %d for bktr%d",type,unit); 163 1.1.1.1.2.2 bouyer return NULL; 164 1.1.1.1.2.2 bouyer } 165 1.1.1.1.2.2 bouyer } 166 1.1.1.1.2.2 bouyer 167 1.1.1.1.2.2 bouyer /*************************************************************/ 168 1.1.1.1.2.2 bouyer 169 1.1.1.1.2.2 bouyer static moduledata_t bktr_mem_mod = { 170 1.1.1.1.2.2 bouyer "bktr_mem", 171 1.1.1.1.2.2 bouyer bktr_mem_modevent, 172 1.1.1.1.2.2 bouyer 0 173 1.1.1.1.2.2 bouyer }; 174 1.1.1.1.2.2 bouyer /* The load order is First and module type is Driver to make sure bktr_mem 175 1.1.1.1.2.2 bouyer loads (and initialises) before bktr when both are loaded together */ 176 1.1.1.1.2.2 bouyer DECLARE_MODULE(bktr_mem, bktr_mem_mod, SI_SUB_DRIVERS, SI_ORDER_FIRST); 177 1.1.1.1.2.2 bouyer MODULE_VERSION(bktr_mem, 1); 178
Indexes created Wed Oct 22 13:09:56 GMT 2025