1 /* 2 * Copyright 2005-2009, Axel Dörfler, axeld@pinc-software.de. 3 * Copyright 2016, Jessica Hamilton, jessica.l.hamilton@gmail.com. 4 * Distributed under the terms of the MIT License. 5 */ 6 7 8 #include <OS.h> 9 #include <KernelExport.h> 10 #include <SupportDefs.h> 11 #include <PCI.h> 12 #include <frame_buffer_console.h> 13 #include <boot_item.h> 14 #include <vesa_info.h> 15 16 #include <stdlib.h> 17 #include <stdio.h> 18 #include <string.h> 19 #include <malloc.h> 20 21 #include "driver.h" 22 #include "device.h" 23 24 25 #define TRACE_DRIVER 26 #ifdef TRACE_DRIVER 27 # define TRACE(x) dprintf x 28 #else 29 # define TRACE(x) ; 30 #endif 31 32 #define MAX_CARDS 1 33 34 35 int32 api_version = B_CUR_DRIVER_API_VERSION; 36 37 char* gDeviceNames[MAX_CARDS + 1]; 38 vesa_info* gDeviceInfo[MAX_CARDS]; 39 isa_module_info* gISA; 40 mutex gLock; 41 42 43 extern "C" const char** 44 publish_devices(void) 45 { 46 TRACE((DEVICE_NAME ": publish_devices()\n")); 47 return (const char**)gDeviceNames; 48 } 49 50 51 extern "C" status_t 52 init_hardware(void) 53 { 54 TRACE((DEVICE_NAME ": init_hardware()\n")); 55 56 // If we don't have the VESA mode info, then we have a 57 // dumb framebuffer, in which case we bail, and leave it 58 // up to the framebuffer driver to handle. 59 return (get_boot_item(VESA_MODES_BOOT_INFO, NULL) != NULL 60 && get_boot_item(FRAME_BUFFER_BOOT_INFO, NULL) != NULL) 61 ? B_OK : B_ERROR; 62 } 63 64 65 extern "C" status_t 66 init_driver(void) 67 { 68 TRACE((DEVICE_NAME ": init_driver()\n")); 69 70 gDeviceInfo[0] = (vesa_info*)malloc(sizeof(vesa_info)); 71 if (gDeviceInfo[0] == NULL) 72 return B_NO_MEMORY; 73 74 memset(gDeviceInfo[0], 0, sizeof(vesa_info)); 75 76 status_t status; 77 78 // ISA may not be available on all architectures 79 status = get_module(B_ISA_MODULE_NAME, (module_info**)&gISA); 80 if (status != B_OK) { 81 TRACE((DEVICE_NAME ": ISA bus unavailable\n")); 82 gISA = NULL; 83 } 84 85 gDeviceNames[0] = strdup("graphics/vesa"); 86 if (gDeviceNames[0] == NULL) { 87 status = B_NO_MEMORY; 88 goto err; 89 } 90 91 gDeviceNames[1] = NULL; 92 93 mutex_init(&gLock, "vesa lock"); 94 return B_OK; 95 96 err: 97 put_module(B_ISA_MODULE_NAME); 98 free(gDeviceInfo[0]); 99 return status; 100 } 101 102 103 extern "C" void 104 uninit_driver(void) 105 { 106 TRACE((DEVICE_NAME ": uninit_driver()\n")); 107 108 put_module(B_ISA_MODULE_NAME); 109 mutex_destroy(&gLock); 110 111 // free device related structures 112 char* name; 113 for (int32 index = 0; (name = gDeviceNames[index]) != NULL; index++) { 114 free(gDeviceInfo[index]); 115 free(name); 116 } 117 } 118 119 120 extern "C" device_hooks* 121 find_device(const char* name) 122 { 123 int index; 124 125 TRACE((DEVICE_NAME ": find_device()\n")); 126 127 for (index = 0; gDeviceNames[index] != NULL; index++) { 128 if (!strcmp(name, gDeviceNames[index])) 129 return &gDeviceHooks; 130 } 131 132 return NULL; 133 } 134 135