rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* mdebug.c |
| 2 | * |
| 3 | * Copyright 2015 Brian Swetland <swetland@frotz.net> |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <app.h> |
| 19 | #include <debug.h> |
| 20 | #include <string.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <printf.h> |
| 23 | #include <dev/udc.h> |
| 24 | |
| 25 | #include <platform.h> |
| 26 | #include <arch/arm.h> |
| 27 | #include <kernel/thread.h> |
| 28 | #include <kernel/event.h> |
| 29 | |
| 30 | #include <platform/lpc43xx-gpio.h> |
| 31 | |
| 32 | #include "swd.h" |
| 33 | |
| 34 | #define TX_AHEAD 1 |
| 35 | |
| 36 | static event_t txevt = EVENT_INITIAL_VALUE(txevt, TX_AHEAD, 0); |
| 37 | static event_t rxevt = EVENT_INITIAL_VALUE(rxevt, 0, 0); |
| 38 | |
| 39 | static udc_request_t *txreq; |
| 40 | static udc_request_t *rxreq; |
| 41 | static udc_endpoint_t *txept; |
| 42 | static udc_endpoint_t *rxept; |
| 43 | |
| 44 | static volatile int online; |
| 45 | static volatile int txstatus; |
| 46 | static volatile int rxstatus; |
| 47 | static volatile int rxactual; |
| 48 | |
| 49 | static void mdebug_notify(udc_gadget_t *gadget, unsigned event) { |
| 50 | if (event == UDC_EVENT_ONLINE) { |
| 51 | online = 1; |
| 52 | } else { |
| 53 | online = 0; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | static void rx_complete(udc_request_t *req, unsigned actual, int status) { |
| 58 | rxactual = actual; |
| 59 | rxstatus = status; |
| 60 | event_signal(&rxevt, 0); |
| 61 | } |
| 62 | |
| 63 | static void tx_complete(udc_request_t *req, unsigned actual, int status) { |
| 64 | txstatus = status; |
| 65 | event_signal(&txevt, 0); |
| 66 | } |
| 67 | |
| 68 | #if TX_AHEAD |
| 69 | void usb_xmit(void *data, unsigned len) { |
| 70 | event_wait(&txevt); |
| 71 | event_unsignal(&txevt); |
| 72 | txreq->buffer = data; |
| 73 | txreq->length = len; |
| 74 | txstatus = 1; |
| 75 | if (udc_request_queue(txept, txreq)) { |
| 76 | printf("txqf\n"); |
| 77 | event_signal(&txevt, 0); |
| 78 | } |
| 79 | } |
| 80 | #else |
| 81 | void usb_xmit(void *data, unsigned len) { |
| 82 | event_unsignal(&txevt); |
| 83 | txreq->buffer = data; |
| 84 | txreq->length = len; |
| 85 | txstatus = 1; |
| 86 | if (udc_request_queue(txept, txreq) == 0) { |
| 87 | event_wait(&txevt); |
| 88 | } |
| 89 | } |
| 90 | #endif |
| 91 | |
| 92 | int usb_recv(void *data, unsigned len) { |
| 93 | event_unsignal(&rxevt); |
| 94 | rxreq->buffer = data; |
| 95 | rxreq->length = len; |
| 96 | rxstatus = 1; |
| 97 | if (udc_request_queue(rxept, rxreq)) { |
| 98 | printf("rxqf\n"); |
| 99 | return -1; |
| 100 | } |
| 101 | event_wait(&rxevt); |
| 102 | return rxstatus ? rxstatus : rxactual; |
| 103 | } |
| 104 | |
| 105 | static udc_device_t mdebug_device = { |
| 106 | .vendor_id = 0x1209, |
| 107 | .product_id = 0x5038, |
| 108 | .version_id = 0x0100, |
| 109 | }; |
| 110 | |
| 111 | static udc_endpoint_t *mdebug_endpoints[2]; |
| 112 | |
| 113 | static udc_gadget_t mdebug_gadget = { |
| 114 | .notify = mdebug_notify, |
| 115 | .ifc_class = 0xFF, |
| 116 | .ifc_subclass = 0xFF, |
| 117 | .ifc_protocol = 0xFF, |
| 118 | .ifc_endpoints = 2, |
| 119 | .ept = mdebug_endpoints, |
| 120 | }; |
| 121 | |
| 122 | static void mdebug_init(const struct app_descriptor *app) |
| 123 | { |
| 124 | swd_init(); |
| 125 | |
| 126 | udc_init(&mdebug_device); |
| 127 | mdebug_endpoints[0] = txept = udc_endpoint_alloc(UDC_BULK_IN, 512); |
| 128 | mdebug_endpoints[1] = rxept = udc_endpoint_alloc(UDC_BULK_OUT, 512); |
| 129 | txreq = udc_request_alloc(); |
| 130 | rxreq = udc_request_alloc(); |
| 131 | rxreq->complete = rx_complete; |
| 132 | txreq->complete = tx_complete; |
| 133 | udc_register_gadget(&mdebug_gadget); |
| 134 | } |
| 135 | |
| 136 | void handle_rswd(void); |
| 137 | void swo_init(udc_endpoint_t *ept); |
| 138 | void swo_config(unsigned mhz); |
| 139 | |
| 140 | static void mdebug_entry(const struct app_descriptor *app, void *args) |
| 141 | { |
| 142 | udc_start(); |
| 143 | swo_init(txept); |
| 144 | swo_config(6000000); |
| 145 | |
| 146 | for (;;) { |
| 147 | if (!online) { |
| 148 | thread_yield(); |
| 149 | continue; |
| 150 | } |
| 151 | handle_rswd(); |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | APP_START(usbtest) |
| 156 | .init = mdebug_init, |
| 157 | .entry = mdebug_entry, |
| 158 | APP_END |
| 159 | |
| 160 | |