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@ -0,0 +1,502 @@ |
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/* |
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ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio |
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Licensed under the Apache License, Version 2.0 (the "License"); |
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you may not use this file except in compliance with the License. |
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You may obtain a copy of the License at |
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http://www.apache.org/licenses/LICENSE-2.0 |
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Unless required by applicable law or agreed to in writing, software |
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distributed under the License is distributed on an "AS IS" BASIS, |
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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See the License for the specific language governing permissions and |
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limitations under the License. |
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*/ |
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/** |
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* @file hal_serial_usb.c |
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* @brief Serial over USB Driver code. |
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* |
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* @addtogroup SERIAL_USB |
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* @{ |
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*/ |
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#include "hal.h" |
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#include "usb_driver.h" |
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#include <string.h> |
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/*===========================================================================*/ |
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/* Driver local definitions. */ |
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/*===========================================================================*/ |
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/*===========================================================================*/ |
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/* Driver exported variables. */ |
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/*===========================================================================*/ |
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/*===========================================================================*/ |
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/* Driver local variables and types. */ |
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/*===========================================================================*/ |
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/* |
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* Current Line Coding. |
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*/ |
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static cdc_linecoding_t linecoding = { |
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{0x00, 0x96, 0x00, 0x00}, /* 38400. */ |
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LC_STOP_1, LC_PARITY_NONE, 8 |
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}; |
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/*===========================================================================*/ |
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/* Driver local functions. */ |
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/*===========================================================================*/ |
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static bool qmkusb_start_receive(QMKUSBDriver *qmkusbp) { |
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uint8_t *buf; |
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/* If the USB driver is not in the appropriate state then transactions |
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must not be started.*/ |
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if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || |
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(qmkusbp->state != QMKUSB_READY)) { |
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return true; |
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} |
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/* Checking if there is already a transaction ongoing on the endpoint.*/ |
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if (usbGetReceiveStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_in)) { |
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return true; |
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} |
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/* Checking if there is a buffer ready for incoming data.*/ |
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buf = ibqGetEmptyBufferI(&qmkusbp->ibqueue); |
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if (buf == NULL) { |
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return true; |
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} |
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/* Buffer found, starting a new transaction.*/ |
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usbStartReceiveI(qmkusbp->config->usbp, qmkusbp->config->bulk_out, |
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buf, qmkusbp->ibqueue.bsize - sizeof(size_t)); |
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return false; |
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} |
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/* |
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* Interface implementation. |
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*/ |
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static size_t _write(void *ip, const uint8_t *bp, size_t n) { |
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return obqWriteTimeout(&((QMKUSBDriver *)ip)->obqueue, bp, |
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n, TIME_INFINITE); |
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} |
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static size_t _read(void *ip, uint8_t *bp, size_t n) { |
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return ibqReadTimeout(&((QMKUSBDriver *)ip)->ibqueue, bp, |
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n, TIME_INFINITE); |
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} |
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static msg_t _put(void *ip, uint8_t b) { |
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return obqPutTimeout(&((QMKUSBDriver *)ip)->obqueue, b, TIME_INFINITE); |
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} |
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static msg_t _get(void *ip) { |
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return ibqGetTimeout(&((QMKUSBDriver *)ip)->ibqueue, TIME_INFINITE); |
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} |
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static msg_t _putt(void *ip, uint8_t b, systime_t timeout) { |
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return obqPutTimeout(&((QMKUSBDriver *)ip)->obqueue, b, timeout); |
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} |
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static msg_t _gett(void *ip, systime_t timeout) { |
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return ibqGetTimeout(&((QMKUSBDriver *)ip)->ibqueue, timeout); |
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} |
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static size_t _writet(void *ip, const uint8_t *bp, size_t n, systime_t timeout) { |
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return obqWriteTimeout(&((QMKUSBDriver *)ip)->obqueue, bp, n, timeout); |
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} |
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static size_t _readt(void *ip, uint8_t *bp, size_t n, systime_t timeout) { |
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return ibqReadTimeout(&((QMKUSBDriver *)ip)->ibqueue, bp, n, timeout); |
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} |
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static const struct QMKUSBDriverVMT vmt = { |
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_write, _read, _put, _get, |
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_putt, _gett, _writet, _readt |
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}; |
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/** |
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* @brief Notification of empty buffer released into the input buffers queue. |
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* |
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* @param[in] bqp the buffers queue pointer. |
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*/ |
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static void ibnotify(io_buffers_queue_t *bqp) { |
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QMKUSBDriver *qmkusbp = bqGetLinkX(bqp); |
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(void) qmkusb_start_receive(qmkusbp); |
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} |
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/** |
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* @brief Notification of filled buffer inserted into the output buffers queue. |
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* |
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* @param[in] bqp the buffers queue pointer. |
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*/ |
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static void obnotify(io_buffers_queue_t *bqp) { |
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size_t n; |
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QMKUSBDriver *qmkusbp = bqGetLinkX(bqp); |
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/* If the USB driver is not in the appropriate state then transactions |
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must not be started.*/ |
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if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || |
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(qmkusbp->state != QMKUSB_READY)) { |
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return; |
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} |
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/* Checking if there is already a transaction ongoing on the endpoint.*/ |
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if (!usbGetTransmitStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_in)) { |
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/* Trying to get a full buffer.*/ |
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uint8_t *buf = obqGetFullBufferI(&qmkusbp->obqueue, &n); |
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if (buf != NULL) { |
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/* Buffer found, starting a new transaction.*/ |
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usbStartTransmitI(qmkusbp->config->usbp, qmkusbp->config->bulk_in, buf, n); |
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} |
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} |
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} |
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/*===========================================================================*/ |
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/* Driver exported functions. */ |
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/*===========================================================================*/ |
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/** |
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* @brief Serial Driver initialization. |
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* @note This function is implicitly invoked by @p halInit(), there is |
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* no need to explicitly initialize the driver. |
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* |
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* @init |
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*/ |
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void qmkusbInit(void) { |
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} |
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/** |
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* @brief Initializes a generic full duplex driver object. |
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* @details The HW dependent part of the initialization has to be performed |
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* outside, usually in the hardware initialization code. |
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* |
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* @param[out] qmkusbp pointer to a @p QMKUSBDriver structure |
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* |
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* @init |
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*/ |
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void qmkusbObjectInit(QMKUSBDriver *qmkusbp, const QMKUSBConfig *config) { |
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qmkusbp->vmt = &vmt; |
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osalEventObjectInit(&qmkusbp->event); |
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qmkusbp->state = QMKUSB_STOP; |
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// Note that the config uses the USB direction naming |
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ibqObjectInit(&qmkusbp->ibqueue, true, config->ob, |
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config->out_size, config->out_buffers, |
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ibnotify, qmkusbp); |
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obqObjectInit(&qmkusbp->obqueue, true, config->ib, |
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config->in_size, config->in_buffers, |
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obnotify, qmkusbp); |
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} |
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/** |
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* @brief Configures and starts the driver. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* @param[in] config the serial over USB driver configuration |
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* |
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* @api |
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*/ |
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void qmkusbStart(QMKUSBDriver *qmkusbp, const QMKUSBConfig *config) { |
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USBDriver *usbp = config->usbp; |
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osalDbgCheck(qmkusbp != NULL); |
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osalSysLock(); |
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osalDbgAssert((qmkusbp->state == QMKUSB_STOP) || (qmkusbp->state == QMKUSB_READY), |
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"invalid state"); |
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usbp->in_params[config->bulk_in - 1U] = qmkusbp; |
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usbp->out_params[config->bulk_out - 1U] = qmkusbp; |
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if (config->int_in > 0U) { |
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usbp->in_params[config->int_in - 1U] = qmkusbp; |
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} |
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qmkusbp->config = config; |
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qmkusbp->state = QMKUSB_READY; |
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osalSysUnlock(); |
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} |
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/** |
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* @brief Stops the driver. |
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* @details Any thread waiting on the driver's queues will be awakened with |
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* the message @p MSG_RESET. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* |
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* @api |
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*/ |
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void qmkusbStop(QMKUSBDriver *qmkusbp) { |
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USBDriver *usbp = qmkusbp->config->usbp; |
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osalDbgCheck(qmkusbp != NULL); |
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osalSysLock(); |
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osalDbgAssert((qmkusbp->state == QMKUSB_STOP) || (qmkusbp->state == QMKUSB_READY), |
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"invalid state"); |
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/* Driver in stopped state.*/ |
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usbp->in_params[qmkusbp->config->bulk_in - 1U] = NULL; |
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usbp->out_params[qmkusbp->config->bulk_out - 1U] = NULL; |
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if (qmkusbp->config->int_in > 0U) { |
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usbp->in_params[qmkusbp->config->int_in - 1U] = NULL; |
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} |
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qmkusbp->config = NULL; |
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qmkusbp->state = QMKUSB_STOP; |
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/* Enforces a disconnection.*/ |
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chnAddFlagsI(qmkusbp, CHN_DISCONNECTED); |
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ibqResetI(&qmkusbp->ibqueue); |
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obqResetI(&qmkusbp->obqueue); |
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osalOsRescheduleS(); |
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osalSysUnlock(); |
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} |
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/** |
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* @brief USB device suspend handler. |
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* @details Generates a @p CHN_DISCONNECT event and puts queues in |
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* non-blocking mode, this way the application cannot get stuck |
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* in the middle of an I/O operations. |
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* @note If this function is not called from an ISR then an explicit call |
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* to @p osalOsRescheduleS() in necessary afterward. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* |
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* @iclass |
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*/ |
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void qmkusbSuspendHookI(QMKUSBDriver *qmkusbp) { |
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chnAddFlagsI(qmkusbp, CHN_DISCONNECTED); |
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bqSuspendI(&qmkusbp->ibqueue); |
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bqSuspendI(&qmkusbp->obqueue); |
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} |
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/** |
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* @brief USB device wakeup handler. |
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* @details Generates a @p CHN_CONNECT event and resumes normal queues |
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* operations. |
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* |
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* @note If this function is not called from an ISR then an explicit call |
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* to @p osalOsRescheduleS() in necessary afterward. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* |
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* @iclass |
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*/ |
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void qmkusbWakeupHookI(QMKUSBDriver *qmkusbp) { |
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chnAddFlagsI(qmkusbp, CHN_CONNECTED); |
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bqResumeX(&qmkusbp->ibqueue); |
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bqResumeX(&qmkusbp->obqueue); |
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} |
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/** |
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* @brief USB device configured handler. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* |
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* @iclass |
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*/ |
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void qmkusbConfigureHookI(QMKUSBDriver *qmkusbp) { |
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ibqResetI(&qmkusbp->ibqueue); |
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bqResumeX(&qmkusbp->ibqueue); |
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obqResetI(&qmkusbp->obqueue); |
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bqResumeX(&qmkusbp->obqueue); |
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chnAddFlagsI(qmkusbp, CHN_CONNECTED); |
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(void) qmkusb_start_receive(qmkusbp); |
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} |
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/** |
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* @brief Default requests hook. |
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* @details Applications wanting to use the Serial over USB driver can use |
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* this function as requests hook in the USB configuration. |
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* The following requests are emulated: |
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* - CDC_GET_LINE_CODING. |
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* - CDC_SET_LINE_CODING. |
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* - CDC_SET_CONTROL_LINE_STATE. |
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* . |
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* |
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* @param[in] usbp pointer to the @p USBDriver object |
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* @return The hook status. |
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* @retval true Message handled internally. |
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* @retval false Message not handled. |
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*/ |
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bool qmkusbRequestsHook(USBDriver *usbp) { |
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if ((usbp->setup[0] & USB_RTYPE_TYPE_MASK) == USB_RTYPE_TYPE_CLASS) { |
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switch (usbp->setup[1]) { |
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case CDC_GET_LINE_CODING: |
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usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL); |
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return true; |
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case CDC_SET_LINE_CODING: |
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usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL); |
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return true; |
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case CDC_SET_CONTROL_LINE_STATE: |
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/* Nothing to do, there are no control lines.*/ |
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usbSetupTransfer(usbp, NULL, 0, NULL); |
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return true; |
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default: |
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return false; |
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} |
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} |
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return false; |
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} |
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/** |
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* @brief SOF handler. |
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* @details The SOF interrupt is used for automatic flushing of incomplete |
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* buffers pending in the output queue. |
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* |
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* @param[in] qmkusbp pointer to a @p QMKUSBDriver object |
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* |
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* @iclass |
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*/ |
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void qmkusbSOFHookI(QMKUSBDriver *qmkusbp) { |
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/* If the USB driver is not in the appropriate state then transactions |
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must not be started.*/ |
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if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || |
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(qmkusbp->state != QMKUSB_READY)) { |
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return; |
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} |
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/* If there is already a transaction ongoing then another one cannot be |
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started.*/ |
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if (usbGetTransmitStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_in)) { |
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return; |
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} |
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/* Checking if there only a buffer partially filled, if so then it is |
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enforced in the queue and transmitted.*/ |
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if (obqTryFlushI(&qmkusbp->obqueue)) { |
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size_t n; |
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uint8_t *buf = obqGetFullBufferI(&qmkusbp->obqueue, &n); |
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/* For fixed size drivers, fill the end with zeros */ |
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if (qmkusbp->config->fixed_size) { |
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memset(buf + n, 0, qmkusbp->config->in_size - n); |
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n = qmkusbp->config->in_size; |
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} |
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osalDbgAssert(buf != NULL, "queue is empty"); |
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usbStartTransmitI(qmkusbp->config->usbp, qmkusbp->config->bulk_in, buf, n); |
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} |
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} |
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/** |
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* @brief Default data transmitted callback. |
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* @details The application must use this function as callback for the IN |
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* data endpoint. |
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* |
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* @param[in] usbp pointer to the @p USBDriver object |
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* @param[in] ep IN endpoint number |
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*/ |
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void qmkusbDataTransmitted(USBDriver *usbp, usbep_t ep) { |
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uint8_t *buf; |
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size_t n; |
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QMKUSBDriver *qmkusbp = usbp->in_params[ep - 1U]; |
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if (qmkusbp == NULL) { |
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return; |
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} |
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osalSysLockFromISR(); |
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/* Signaling that space is available in the output queue.*/ |
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chnAddFlagsI(qmkusbp, CHN_OUTPUT_EMPTY); |
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/* Freeing the buffer just transmitted, if it was not a zero size packet.*/ |
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if (usbp->epc[ep]->in_state->txsize > 0U) { |
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obqReleaseEmptyBufferI(&qmkusbp->obqueue); |
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} |
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/* Checking if there is a buffer ready for transmission.*/ |
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buf = obqGetFullBufferI(&qmkusbp->obqueue, &n); |
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if (buf != NULL) { |
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/* The endpoint cannot be busy, we are in the context of the callback, |
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so it is safe to transmit without a check.*/ |
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usbStartTransmitI(usbp, ep, buf, n); |
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} |
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else if ((usbp->epc[ep]->in_state->txsize > 0U) && |
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((usbp->epc[ep]->in_state->txsize & |
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((size_t)usbp->epc[ep]->in_maxsize - 1U)) == 0U)) { |
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|
/* Transmit zero sized packet in case the last one has maximum allowed |
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|
size. Otherwise the recipient may expect more data coming soon and |
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|
not return buffered data to app. See section 5.8.3 Bulk Transfer |
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|
Packet Size Constraints of the USB Specification document.*/ |
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|
if (!qmkusbp->config->fixed_size) { |
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usbStartTransmitI(usbp, ep, usbp->setup, 0); |
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} |
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} |
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else { |
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/* Nothing to transmit.*/ |
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} |
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osalSysUnlockFromISR(); |
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} |
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/** |
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* @brief Default data received callback. |
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|
* @details The application must use this function as callback for the OUT |
|
|
|
* data endpoint. |
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|
* |
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|
* @param[in] usbp pointer to the @p USBDriver object |
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|
* @param[in] ep OUT endpoint number |
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|
*/ |
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|
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void qmkusbDataReceived(USBDriver *usbp, usbep_t ep) { |
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|
QMKUSBDriver *qmkusbp = usbp->out_params[ep - 1U]; |
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|
|
if (qmkusbp == NULL) { |
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|
return; |
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|
} |
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|
|
osalSysLockFromISR(); |
|
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|
/* Signaling that data is available in the input queue.*/ |
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|
|
chnAddFlagsI(qmkusbp, CHN_INPUT_AVAILABLE); |
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|
/* Posting the filled buffer in the queue.*/ |
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|
|
ibqPostFullBufferI(&qmkusbp->ibqueue, |
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|
usbGetReceiveTransactionSizeX(qmkusbp->config->usbp, |
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|
qmkusbp->config->bulk_out)); |
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|
|
/* The endpoint cannot be busy, we are in the context of the callback, |
|
|
|
so a packet is in the buffer for sure. Trying to get a free buffer |
|
|
|
for the next transaction.*/ |
|
|
|
(void) qmkusb_start_receive(qmkusbp); |
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|
|
osalSysUnlockFromISR(); |
|
|
|
} |
|
|
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|
|
|
/** |
|
|
|
* @brief Default data received callback. |
|
|
|
* @details The application must use this function as callback for the IN |
|
|
|
* interrupt endpoint. |
|
|
|
* |
|
|
|
* @param[in] usbp pointer to the @p USBDriver object |
|
|
|
* @param[in] ep endpoint number |
|
|
|
*/ |
|
|
|
void qmkusbInterruptTransmitted(USBDriver *usbp, usbep_t ep) { |
|
|
|
|
|
|
|
(void)usbp; |
|
|
|
(void)ep; |
|
|
|
} |
|
|
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|
|
|
/** @} */ |