1 /* 2 * Copyright (c) 2007 Marcus Overhagen <marcus@overhagen.de> 3 * 4 * Permission is hereby granted, free of charge, to any person 5 * obtaining a copy of this software and associated documentation 6 * files (the "Software"), to deal in the Software without restriction, 7 * including without limitation the rights to use, copy, modify, 8 * merge, publish, distribute, sublicense, and/or sell copies of 9 * the Software, and to permit persons to whom the Software is 10 * furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be 13 * included in all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 #include <KernelExport.h> 26 #include <Drivers.h> 27 #include <Errors.h> 28 29 int32 api_version = B_CUR_DRIVER_API_VERSION; 30 static int32 sOpenMask; 31 32 status_t 33 init_hardware(void) 34 { 35 dprintf("test: init_hardware\n"); 36 return B_OK; 37 } 38 39 40 status_t 41 init_driver(void) 42 { 43 dprintf("test: init_driver\n"); 44 return B_OK; 45 } 46 47 48 void 49 uninit_driver(void) 50 { 51 dprintf("test: uninit_driver\n"); 52 } 53 54 55 static status_t 56 driver_open(const char *name, uint32 flags, void** _cookie) 57 { 58 dprintf("test: open\n"); 59 60 if (atomic_or(&sOpenMask, 1)) { 61 dprintf("test: open, BUSY!\n"); 62 return B_BUSY; 63 } 64 65 dprintf("test: open, success\n"); 66 return B_OK; 67 } 68 69 70 static status_t 71 driver_close(void* cookie) 72 { 73 dprintf("test: close enter\n"); 74 snooze(200000); 75 dprintf("test: close leave\n"); 76 return B_OK; 77 } 78 79 80 static status_t 81 driver_free(void* cookie) 82 { 83 dprintf("test: free\n"); 84 atomic_and(&sOpenMask, ~1); 85 return B_OK; 86 } 87 88 89 static status_t 90 driver_read(void* cookie, off_t position, void *buf, size_t* num_bytes) 91 { 92 dprintf("test: read\n"); 93 *num_bytes = 0; // nothing to read 94 return B_ERROR; 95 } 96 97 98 static status_t 99 driver_write(void* cookie, off_t position, const void* buffer, size_t* num_bytes) 100 { 101 dprintf("test: write\n"); 102 snooze(1000000); // 1s 103 *num_bytes = 1; // pretend 1 byte was written 104 return B_OK; 105 } 106 107 108 static status_t 109 driver_control(void *cookie, uint32 op, void *arg, size_t len) 110 { 111 dprintf("test: control\n"); 112 return B_ERROR; 113 } 114 115 116 const char** 117 publish_devices(void) 118 { 119 static const char *names[] = {"misc/test/1", NULL}; 120 dprintf("test: publish_devices\n"); 121 return names; 122 } 123 124 125 device_hooks* 126 find_device(const char* name) 127 { 128 static device_hooks hooks = { 129 driver_open, 130 driver_close, 131 driver_free, 132 driver_control, 133 driver_read, 134 driver_write, 135 }; 136 dprintf("test: find_device\n"); 137 return &hooks; 138 } 139 140