1 /* 2 * Copyright 2007-2008, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT License. 4 * 5 * Authors: 6 * Ithamar Adema, ithamar AT unet DOT nl 7 */ 8 9 10 #include "driver.h" 11 12 13 static status_t 14 hda_open(const char *name, uint32 flags, void** cookie) 15 { 16 hda_controller* controller = NULL; 17 18 for (uint32 i = 0; i < gNumCards; i++) { 19 if (strcmp(gCards[i].devfs_path, name) == 0) { 20 controller = &gCards[i]; 21 break; 22 } 23 } 24 25 if (controller == NULL) 26 return ENODEV; 27 28 if (controller->opened) 29 return B_BUSY; 30 31 status_t status = hda_hw_init(controller); 32 if (status != B_OK) 33 return status; 34 35 atomic_add(&controller->opened, 1); 36 37 *cookie = controller; 38 return B_OK; 39 } 40 41 42 static status_t 43 hda_read(void* cookie, off_t position, void *buf, size_t* numBytes) 44 { 45 *numBytes = 0; 46 /* tell caller nothing was read */ 47 return B_IO_ERROR; 48 } 49 50 51 static status_t 52 hda_write(void* cookie, off_t position, const void* buffer, size_t* numBytes) 53 { 54 *numBytes = 0; 55 /* tell caller nothing was written */ 56 return B_IO_ERROR; 57 } 58 59 60 static status_t 61 hda_control(void* cookie, uint32 op, void* arg, size_t length) 62 { 63 hda_controller* controller = (hda_controller*)cookie; 64 if (controller->active_codec) 65 return multi_audio_control(controller->active_codec, op, arg, length); 66 67 return B_BAD_VALUE; 68 } 69 70 71 static status_t 72 hda_close(void* cookie) 73 { 74 hda_controller* controller = (hda_controller*)cookie; 75 hda_hw_stop(controller); 76 atomic_add(&controller->opened, -1); 77 78 return B_OK; 79 } 80 81 82 static status_t 83 hda_free(void* cookie) 84 { 85 hda_controller* controller = (hda_controller*)cookie; 86 hda_hw_uninit(controller); 87 88 return B_OK; 89 } 90 91 92 device_hooks gDriverHooks = { 93 hda_open, /* -> open entry point */ 94 hda_close, /* -> close entry point */ 95 hda_free, /* -> free cookie */ 96 hda_control, /* -> control entry point */ 97 hda_read, /* -> read entry point */ 98 hda_write /* -> write entry point */ 99 }; 100