Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 17 | #include "include/ese/ese.h" |
| 18 | #include "include/ese/log.h" |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 19 | |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 20 | static const char kUnknownHw[] = "unknown hw"; |
| 21 | static const char kNullEse[] = "NULL EseInterface"; |
| 22 | static const char *kEseErrorMessages[] = { |
| 23 | "Hardware supplied no transceive implementation.", |
| 24 | "Timed out polling for value.", |
| 25 | }; |
| 26 | #define ESE_MESSAGES(x) (sizeof(x) / sizeof((x)[0])) |
| 27 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 28 | ESE_API const char *ese_name(const struct EseInterface *ese) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 29 | if (!ese) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 30 | return kNullEse; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 31 | } |
| 32 | if (ese->ops->name) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 33 | return ese->ops->name; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 34 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 35 | return kUnknownHw; |
| 36 | } |
| 37 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 38 | ESE_API int ese_open(struct EseInterface *ese, void *hw_opts) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 39 | if (!ese) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 40 | return -1; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 41 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 42 | ALOGV("opening interface '%s'", ese_name(ese)); |
Will Drewry | 7be2c3f | 2017-04-21 14:12:17 -0500 | [diff] [blame^] | 43 | ese->error.is_err = false; |
| 44 | ese->error.code = 0; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 45 | if (ese->ops->open) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 46 | return ese->ops->open(ese, hw_opts); |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 47 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 48 | return 0; |
| 49 | } |
| 50 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 51 | ESE_API const char *ese_error_message(const struct EseInterface *ese) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 52 | return ese->error.message; |
| 53 | } |
| 54 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 55 | ESE_API int ese_error_code(const struct EseInterface *ese) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 56 | return ese->error.code; |
| 57 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 58 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 59 | ESE_API bool ese_error(const struct EseInterface *ese) { |
| 60 | return ese->error.is_err; |
| 61 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 62 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 63 | ESE_API void ese_set_error(struct EseInterface *ese, int code) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 64 | if (!ese) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 65 | return; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 66 | } |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 67 | /* Negative values are reserved for ESE_API wide messages. */ |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 68 | ese->error.code = code; |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 69 | ese->error.is_err = true; |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 70 | if (code < 0) { |
| 71 | code = -(code + 1); /* Start at 0. */ |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 72 | if ((uint32_t)(code) >= ESE_MESSAGES(kEseErrorMessages)) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 73 | LOG_ALWAYS_FATAL("Unknown global error code passed to ese_set_error(%d)", |
| 74 | code); |
| 75 | } |
| 76 | ese->error.message = kEseErrorMessages[code]; |
| 77 | return; |
| 78 | } |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 79 | if ((uint32_t)(code) >= ese->ops->errors_count) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 80 | LOG_ALWAYS_FATAL("Unknown hw error code passed to ese_set_error(%d)", code); |
| 81 | } |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 82 | ese->error.message = ese->ops->errors[code]; |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | /* Blocking. */ |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 86 | ESE_API int ese_transceive(struct EseInterface *ese, const uint8_t *tx_buf, |
| 87 | uint32_t tx_len, uint8_t *rx_buf, uint32_t rx_max) { |
| 88 | const struct EseSgBuffer tx = { |
| 89 | .c_base = tx_buf, .len = tx_len, |
| 90 | }; |
| 91 | struct EseSgBuffer rx = { |
| 92 | .base = rx_buf, .len = rx_max, |
| 93 | }; |
| 94 | return ese_transceive_sg(ese, &tx, 1, &rx, 1); |
| 95 | } |
| 96 | |
| 97 | ESE_API int ese_transceive_sg(struct EseInterface *ese, |
| 98 | const struct EseSgBuffer *tx_bufs, |
| 99 | uint32_t tx_segs, struct EseSgBuffer *rx_bufs, |
| 100 | uint32_t rx_segs) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 101 | uint32_t recvd = 0; |
| 102 | if (!ese) { |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 103 | return -1; |
Will Drewry | ed4a7a7 | 2017-03-10 11:03:59 -0600 | [diff] [blame] | 104 | } |
Will Drewry | 7be2c3f | 2017-04-21 14:12:17 -0500 | [diff] [blame^] | 105 | if (ese->error.is_err) { |
| 106 | return -1; |
| 107 | } |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 108 | if (ese->ops->transceive) { |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 109 | recvd = ese->ops->transceive(ese, tx_bufs, tx_segs, rx_bufs, rx_segs); |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 110 | return ese_error(ese) ? -1 : recvd; |
| 111 | } |
| 112 | |
| 113 | ese_set_error(ese, kEseGlobalErrorNoTransceive); |
| 114 | return -1; |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 115 | } |
| 116 | |
Will Drewry | 8f367fc | 2017-03-30 22:07:48 -0500 | [diff] [blame] | 117 | ESE_API void ese_close(struct EseInterface *ese) { |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 118 | if (!ese) { |
| 119 | return; |
| 120 | } |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 121 | ALOGV("closing interface '%s'", ese_name(ese)); |
Will Drewry | de2cad7 | 2017-03-10 15:53:34 -0600 | [diff] [blame] | 122 | if (!ese->ops->close) { |
| 123 | return; |
| 124 | } |
| 125 | ese->ops->close(ese); |
Will Drewry | d4ae528 | 2017-01-03 22:06:26 -0600 | [diff] [blame] | 126 | } |