Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2014 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_INCLUDE_HARDWARE_FINGERPRINT_H |
| 18 | #define ANDROID_INCLUDE_HARDWARE_FINGERPRINT_H |
| 19 | |
| 20 | #define FINGERPRINT_MODULE_API_VERSION_1_0 HARDWARE_MODULE_API_VERSION(1, 0) |
| 21 | #define FINGERPRINT_HARDWARE_MODULE_ID "fingerprint" |
| 22 | |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 23 | typedef enum fingerprint_msg_type { |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 24 | FINGERPRINT_ERROR = -1, |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 25 | FINGERPRINT_SCANNED = 1, |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 26 | FINGERPRINT_TEMPLATE_ENROLLING = 2, |
| 27 | FINGERPRINT_TEMPLATE_REMOVED = 4 |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 28 | } fingerprint_msg_type_t; |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 29 | |
| 30 | typedef enum fingerprint_error { |
| 31 | FINGERPRINT_ERROR_HW_UNAVAILABLE = 1, |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 32 | FINGERPRINT_ERROR_BAD_CAPTURE = 2, |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 33 | FINGERPRINT_ERROR_TIMEOUT = 3, |
| 34 | FINGERPRINT_ERROR_NO_SPACE = 4 /* No space available to store a template */ |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 35 | } fingerprint_error_t; |
| 36 | |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 37 | typedef struct fingerprint_enroll { |
| 38 | uint32_t id; |
Sasha Levitskiy | 3b9ee8d | 2014-04-23 10:04:57 -0700 | [diff] [blame] | 39 | /* samples_remaining goes from N (no data collected, but N scans needed) |
Sasha Levitskiy | 969466c | 2014-05-07 09:07:11 -0700 | [diff] [blame^] | 40 | * to 0 (no more data is needed to build a template). |
| 41 | * The progress indication may be augmented by a bitmap encoded indication |
| 42 | * of finger area that needs to be presented by the user. |
| 43 | * Bit numbers mapped to physical location: |
| 44 | * |
| 45 | * distal |
| 46 | * +-+-+-+ |
| 47 | * |2|1|0| |
| 48 | * |5|4|3| |
| 49 | * medial |8|7|6| lateral |
| 50 | * |b|a|9| |
| 51 | * |e|d|c| |
| 52 | * +-+-+-+ |
| 53 | * proximal |
| 54 | * |
| 55 | */ |
| 56 | uint16_t data_collected_bmp; |
| 57 | uint16_t samples_remaining; |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 58 | } fingerprint_enroll_t; |
| 59 | |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 60 | typedef struct fingerprint_removed { |
| 61 | uint32_t id; |
| 62 | } fingerprint_removed_t; |
| 63 | |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 64 | typedef struct fingerprint_scanned { |
| 65 | uint32_t id; /* 0 is a special id and means no match */ |
Sasha Levitskiy | cc14f23 | 2014-04-24 09:52:47 -0700 | [diff] [blame] | 66 | } fingerprint_scanned_t; |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 67 | |
| 68 | typedef struct fingerprint_msg { |
| 69 | fingerprint_msg_type_t type; |
| 70 | union { |
| 71 | uint64_t raw; |
| 72 | fingerprint_error_t error; |
| 73 | fingerprint_enroll_t enroll; |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 74 | fingerprint_removed_t removed; |
Sasha Levitskiy | cc14f23 | 2014-04-24 09:52:47 -0700 | [diff] [blame] | 75 | fingerprint_scanned_t scan; |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 76 | } data; |
| 77 | } fingerprint_msg_t; |
| 78 | |
| 79 | /* Callback function type */ |
| 80 | typedef void (*fingerprint_notify_t)(fingerprint_msg_t msg); |
| 81 | |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 82 | /* Synchronous operation */ |
| 83 | typedef struct fingerprint_device { |
Stewart Miles | 84d3549 | 2014-05-01 09:03:27 -0700 | [diff] [blame] | 84 | /** |
| 85 | * Common methods of the fingerprint device. This *must* be the first member of |
| 86 | * fingerprint_device as users of this structure will cast a hw_device_t to |
| 87 | * fingerprint_device pointer in contexts where it's known the hw_device_t references a |
| 88 | * fingerprint_device. |
| 89 | */ |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 90 | struct hw_device_t common; |
| 91 | |
| 92 | /* |
Sasha Levitskiy | 3b9ee8d | 2014-04-23 10:04:57 -0700 | [diff] [blame] | 93 | * Fingerprint enroll request: |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 94 | * Switches the HAL state machine to collect and store a new fingerprint |
| 95 | * template. Switches back as soon as enroll is complete |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 96 | * (fingerprint_msg.type == FINGERPRINT_TEMPLATE_ENROLLING && |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 97 | * fingerprint_msg.data.enroll.samples_remaining == 0) |
Sasha Levitskiy | 3b9ee8d | 2014-04-23 10:04:57 -0700 | [diff] [blame] | 98 | * or after timeout_sec seconds. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 99 | * |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 100 | * Function return: 0 if enrollment process can be successfully started |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 101 | * -1 otherwise. A notify() function may be called |
| 102 | * indicating the error condition. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 103 | */ |
Sasha Levitskiy | 3b9ee8d | 2014-04-23 10:04:57 -0700 | [diff] [blame] | 104 | int (*enroll)(struct fingerprint_device *dev, uint32_t timeout_sec); |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 105 | |
| 106 | /* |
Sasha Levitskiy | 969466c | 2014-05-07 09:07:11 -0700 | [diff] [blame^] | 107 | * Cancel fingerprint enroll request: |
| 108 | * Switches the HAL state machine back to accept a fingerprint scan mode. |
| 109 | * (fingerprint_msg.type == FINGERPRINT_TEMPLATE_ENROLLING && |
| 110 | * fingerprint_msg.data.enroll.samples_remaining == 0) |
| 111 | * will indicate switch back to the scan mode. |
| 112 | * |
| 113 | * Function return: 0 if cancel request is accepted |
| 114 | * -1 otherwise. |
| 115 | */ |
| 116 | int (*enroll_cancel)(struct fingerprint_device *dev); |
| 117 | |
| 118 | /* |
Sasha Levitskiy | 3b9ee8d | 2014-04-23 10:04:57 -0700 | [diff] [blame] | 119 | * Fingerprint remove request: |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 120 | * deletes a fingerprint template. |
| 121 | * If the fingerprint id is 0 the entire template database will be removed. |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 122 | * notify() will be called for each template deleted with |
| 123 | * fingerprint_msg.type == FINGERPRINT_TEMPLATE_REMOVED and |
| 124 | * fingerprint_msg.data.removed.id indicating each template id removed. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 125 | * |
Sasha Levitskiy | 0d1cd3f | 2014-04-30 13:29:43 -0700 | [diff] [blame] | 126 | * Function return: 0 if fingerprint template(s) can be successfully deleted |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 127 | * -1 otherwise. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 128 | */ |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 129 | int (*remove)(struct fingerprint_device *dev, uint32_t fingerprint_id); |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 130 | |
| 131 | /* |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 132 | * Set notification callback: |
| 133 | * Registers a user function that would receive notifications from the HAL |
| 134 | * The call will block if the HAL state machine is in busy state until HAL |
| 135 | * leaves the busy state. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 136 | * |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 137 | * Function return: 0 if callback function is successfuly registered |
| 138 | * -1 otherwise. |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 139 | */ |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 140 | int (*set_notify)(struct fingerprint_device *dev, |
| 141 | fingerprint_notify_t notify); |
| 142 | |
| 143 | /* |
| 144 | * Client provided callback function to receive notifications. |
| 145 | * Do not set by hand, use the function above instead. |
| 146 | */ |
| 147 | fingerprint_notify_t notify; |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 148 | |
| 149 | /* Reserved for future use. Must be NULL. */ |
Sasha Levitskiy | 7308284 | 2014-04-18 11:14:11 -0700 | [diff] [blame] | 150 | void* reserved[8 - 4]; |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 151 | } fingerprint_device_t; |
| 152 | |
| 153 | typedef struct fingerprint_module { |
Stewart Miles | 84d3549 | 2014-05-01 09:03:27 -0700 | [diff] [blame] | 154 | /** |
| 155 | * Common methods of the fingerprint module. This *must* be the first member of |
| 156 | * fingerprint_module as users of this structure will cast a hw_module_t to |
| 157 | * fingerprint_module pointer in contexts where it's known the hw_module_t references a |
| 158 | * fingerprint_module. |
| 159 | */ |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 160 | struct hw_module_t common; |
| 161 | } fingerprint_module_t; |
| 162 | |
Sasha Levitskiy | a747c06 | 2014-03-24 16:14:42 -0700 | [diff] [blame] | 163 | #endif /* ANDROID_INCLUDE_HARDWARE_FINGERPRINT_H */ |