You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
465 lines
15 KiB
465 lines
15 KiB
/*
|
|
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
/**
|
|
* @file hal_serial_usb.c
|
|
* @brief Serial over USB Driver code.
|
|
*
|
|
* @addtogroup SERIAL_USB
|
|
* @{
|
|
*/
|
|
|
|
#include <hal.h>
|
|
#include "usb_driver.h"
|
|
#include <string.h>
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local definitions. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported variables. */
|
|
/*===========================================================================*/
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local variables and types. */
|
|
/*===========================================================================*/
|
|
|
|
/*
|
|
* Current Line Coding.
|
|
*/
|
|
static cdc_linecoding_t linecoding = {{0x00, 0x96, 0x00, 0x00}, /* 38400. */
|
|
LC_STOP_1,
|
|
LC_PARITY_NONE,
|
|
8};
|
|
|
|
/*===========================================================================*/
|
|
/* Driver local functions. */
|
|
/*===========================================================================*/
|
|
|
|
static bool qmkusb_start_receive(QMKUSBDriver *qmkusbp) {
|
|
uint8_t *buf;
|
|
|
|
/* If the USB driver is not in the appropriate state then transactions
|
|
must not be started.*/
|
|
if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || (qmkusbp->state != QMKUSB_READY)) {
|
|
return true;
|
|
}
|
|
|
|
/* Checking if there is already a transaction ongoing on the endpoint.*/
|
|
if (usbGetReceiveStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_out)) {
|
|
return true;
|
|
}
|
|
|
|
/* Checking if there is a buffer ready for incoming data.*/
|
|
buf = ibqGetEmptyBufferI(&qmkusbp->ibqueue);
|
|
if (buf == NULL) {
|
|
return true;
|
|
}
|
|
|
|
/* Buffer found, starting a new transaction.*/
|
|
usbStartReceiveI(qmkusbp->config->usbp, qmkusbp->config->bulk_out, buf, qmkusbp->ibqueue.bsize - sizeof(size_t));
|
|
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Interface implementation.
|
|
*/
|
|
|
|
static size_t _write(void *ip, const uint8_t *bp, size_t n) {
|
|
return obqWriteTimeout(&((QMKUSBDriver *)ip)->obqueue, bp, n, TIME_INFINITE);
|
|
}
|
|
|
|
static size_t _read(void *ip, uint8_t *bp, size_t n) {
|
|
return ibqReadTimeout(&((QMKUSBDriver *)ip)->ibqueue, bp, n, TIME_INFINITE);
|
|
}
|
|
|
|
static msg_t _put(void *ip, uint8_t b) {
|
|
return obqPutTimeout(&((QMKUSBDriver *)ip)->obqueue, b, TIME_INFINITE);
|
|
}
|
|
|
|
static msg_t _get(void *ip) {
|
|
return ibqGetTimeout(&((QMKUSBDriver *)ip)->ibqueue, TIME_INFINITE);
|
|
}
|
|
|
|
static msg_t _putt(void *ip, uint8_t b, sysinterval_t timeout) {
|
|
return obqPutTimeout(&((QMKUSBDriver *)ip)->obqueue, b, timeout);
|
|
}
|
|
|
|
static msg_t _gett(void *ip, sysinterval_t timeout) {
|
|
return ibqGetTimeout(&((QMKUSBDriver *)ip)->ibqueue, timeout);
|
|
}
|
|
|
|
static size_t _writet(void *ip, const uint8_t *bp, size_t n, sysinterval_t timeout) {
|
|
return obqWriteTimeout(&((QMKUSBDriver *)ip)->obqueue, bp, n, timeout);
|
|
}
|
|
|
|
static size_t _readt(void *ip, uint8_t *bp, size_t n, sysinterval_t timeout) {
|
|
return ibqReadTimeout(&((QMKUSBDriver *)ip)->ibqueue, bp, n, timeout);
|
|
}
|
|
|
|
static const struct QMKUSBDriverVMT vmt = {0, _write, _read, _put, _get, _putt, _gett, _writet, _readt};
|
|
|
|
/**
|
|
* @brief Notification of empty buffer released into the input buffers queue.
|
|
*
|
|
* @param[in] bqp the buffers queue pointer.
|
|
*/
|
|
static void ibnotify(io_buffers_queue_t *bqp) {
|
|
QMKUSBDriver *qmkusbp = bqGetLinkX(bqp);
|
|
(void)qmkusb_start_receive(qmkusbp);
|
|
}
|
|
|
|
/**
|
|
* @brief Notification of filled buffer inserted into the output buffers queue.
|
|
*
|
|
* @param[in] bqp the buffers queue pointer.
|
|
*/
|
|
static void obnotify(io_buffers_queue_t *bqp) {
|
|
size_t n;
|
|
QMKUSBDriver *qmkusbp = bqGetLinkX(bqp);
|
|
|
|
/* If the USB driver is not in the appropriate state then transactions
|
|
must not be started.*/
|
|
if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || (qmkusbp->state != QMKUSB_READY)) {
|
|
return;
|
|
}
|
|
|
|
/* Checking if there is already a transaction ongoing on the endpoint.*/
|
|
if (!usbGetTransmitStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_in)) {
|
|
/* Trying to get a full buffer.*/
|
|
uint8_t *buf = obqGetFullBufferI(&qmkusbp->obqueue, &n);
|
|
if (buf != NULL) {
|
|
/* Buffer found, starting a new transaction.*/
|
|
usbStartTransmitI(qmkusbp->config->usbp, qmkusbp->config->bulk_in, buf, n);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*===========================================================================*/
|
|
/* Driver exported functions. */
|
|
/*===========================================================================*/
|
|
|
|
/**
|
|
* @brief Serial Driver initialization.
|
|
* @note This function is implicitly invoked by @p halInit(), there is
|
|
* no need to explicitly initialize the driver.
|
|
*
|
|
* @init
|
|
*/
|
|
void qmkusbInit(void) {}
|
|
|
|
/**
|
|
* @brief Initializes a generic full duplex driver object.
|
|
* @details The HW dependent part of the initialization has to be performed
|
|
* outside, usually in the hardware initialization code.
|
|
*
|
|
* @param[out] qmkusbp pointer to a @p QMKUSBDriver structure
|
|
*
|
|
* @init
|
|
*/
|
|
void qmkusbObjectInit(QMKUSBDriver *qmkusbp, const QMKUSBConfig *config) {
|
|
qmkusbp->vmt = &vmt;
|
|
osalEventObjectInit(&qmkusbp->event);
|
|
qmkusbp->state = QMKUSB_STOP;
|
|
// Note that the config uses the USB direction naming
|
|
ibqObjectInit(&qmkusbp->ibqueue, true, config->ob, config->out_size, config->out_buffers, ibnotify, qmkusbp);
|
|
obqObjectInit(&qmkusbp->obqueue, true, config->ib, config->in_size, config->in_buffers, obnotify, qmkusbp);
|
|
}
|
|
|
|
/**
|
|
* @brief Configures and starts the driver.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
* @param[in] config the serial over USB driver configuration
|
|
*
|
|
* @api
|
|
*/
|
|
void qmkusbStart(QMKUSBDriver *qmkusbp, const QMKUSBConfig *config) {
|
|
USBDriver *usbp = config->usbp;
|
|
|
|
osalDbgCheck(qmkusbp != NULL);
|
|
|
|
osalSysLock();
|
|
osalDbgAssert((qmkusbp->state == QMKUSB_STOP) || (qmkusbp->state == QMKUSB_READY), "invalid state");
|
|
usbp->in_params[config->bulk_in - 1U] = qmkusbp;
|
|
usbp->out_params[config->bulk_out - 1U] = qmkusbp;
|
|
if (config->int_in > 0U) {
|
|
usbp->in_params[config->int_in - 1U] = qmkusbp;
|
|
}
|
|
qmkusbp->config = config;
|
|
qmkusbp->state = QMKUSB_READY;
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief Stops the driver.
|
|
* @details Any thread waiting on the driver's queues will be awakened with
|
|
* the message @p MSG_RESET.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
*
|
|
* @api
|
|
*/
|
|
void qmkusbStop(QMKUSBDriver *qmkusbp) {
|
|
USBDriver *usbp = qmkusbp->config->usbp;
|
|
|
|
osalDbgCheck(qmkusbp != NULL);
|
|
|
|
osalSysLock();
|
|
|
|
osalDbgAssert((qmkusbp->state == QMKUSB_STOP) || (qmkusbp->state == QMKUSB_READY), "invalid state");
|
|
|
|
/* Driver in stopped state.*/
|
|
usbp->in_params[qmkusbp->config->bulk_in - 1U] = NULL;
|
|
usbp->out_params[qmkusbp->config->bulk_out - 1U] = NULL;
|
|
if (qmkusbp->config->int_in > 0U) {
|
|
usbp->in_params[qmkusbp->config->int_in - 1U] = NULL;
|
|
}
|
|
qmkusbp->config = NULL;
|
|
qmkusbp->state = QMKUSB_STOP;
|
|
|
|
/* Enforces a disconnection.*/
|
|
chnAddFlagsI(qmkusbp, CHN_DISCONNECTED);
|
|
ibqResetI(&qmkusbp->ibqueue);
|
|
obqResetI(&qmkusbp->obqueue);
|
|
osalOsRescheduleS();
|
|
|
|
osalSysUnlock();
|
|
}
|
|
|
|
/**
|
|
* @brief USB device suspend handler.
|
|
* @details Generates a @p CHN_DISCONNECT event and puts queues in
|
|
* non-blocking mode, this way the application cannot get stuck
|
|
* in the middle of an I/O operations.
|
|
* @note If this function is not called from an ISR then an explicit call
|
|
* to @p osalOsRescheduleS() in necessary afterward.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
void qmkusbSuspendHookI(QMKUSBDriver *qmkusbp) {
|
|
chnAddFlagsI(qmkusbp, CHN_DISCONNECTED);
|
|
bqSuspendI(&qmkusbp->ibqueue);
|
|
bqSuspendI(&qmkusbp->obqueue);
|
|
}
|
|
|
|
/**
|
|
* @brief USB device wakeup handler.
|
|
* @details Generates a @p CHN_CONNECT event and resumes normal queues
|
|
* operations.
|
|
*
|
|
* @note If this function is not called from an ISR then an explicit call
|
|
* to @p osalOsRescheduleS() in necessary afterward.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
void qmkusbWakeupHookI(QMKUSBDriver *qmkusbp) {
|
|
chnAddFlagsI(qmkusbp, CHN_CONNECTED);
|
|
bqResumeX(&qmkusbp->ibqueue);
|
|
bqResumeX(&qmkusbp->obqueue);
|
|
}
|
|
|
|
/**
|
|
* @brief USB device configured handler.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
void qmkusbConfigureHookI(QMKUSBDriver *qmkusbp) {
|
|
ibqResetI(&qmkusbp->ibqueue);
|
|
bqResumeX(&qmkusbp->ibqueue);
|
|
obqResetI(&qmkusbp->obqueue);
|
|
bqResumeX(&qmkusbp->obqueue);
|
|
chnAddFlagsI(qmkusbp, CHN_CONNECTED);
|
|
(void)qmkusb_start_receive(qmkusbp);
|
|
}
|
|
|
|
/**
|
|
* @brief Default requests hook.
|
|
* @details Applications wanting to use the Serial over USB driver can use
|
|
* this function as requests hook in the USB configuration.
|
|
* The following requests are emulated:
|
|
* - CDC_GET_LINE_CODING.
|
|
* - CDC_SET_LINE_CODING.
|
|
* - CDC_SET_CONTROL_LINE_STATE.
|
|
* .
|
|
*
|
|
* @param[in] usbp pointer to the @p USBDriver object
|
|
* @return The hook status.
|
|
* @retval true Message handled internally.
|
|
* @retval false Message not handled.
|
|
*/
|
|
bool qmkusbRequestsHook(USBDriver *usbp) {
|
|
if ((usbp->setup[0] & USB_RTYPE_TYPE_MASK) == USB_RTYPE_TYPE_CLASS) {
|
|
switch (usbp->setup[1]) {
|
|
case CDC_GET_LINE_CODING:
|
|
usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL);
|
|
return true;
|
|
case CDC_SET_LINE_CODING:
|
|
usbSetupTransfer(usbp, (uint8_t *)&linecoding, sizeof(linecoding), NULL);
|
|
return true;
|
|
case CDC_SET_CONTROL_LINE_STATE:
|
|
/* Nothing to do, there are no control lines.*/
|
|
usbSetupTransfer(usbp, NULL, 0, NULL);
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @brief SOF handler.
|
|
* @details The SOF interrupt is used for automatic flushing of incomplete
|
|
* buffers pending in the output queue.
|
|
*
|
|
* @param[in] qmkusbp pointer to a @p QMKUSBDriver object
|
|
*
|
|
* @iclass
|
|
*/
|
|
void qmkusbSOFHookI(QMKUSBDriver *qmkusbp) {
|
|
/* If the USB driver is not in the appropriate state then transactions
|
|
must not be started.*/
|
|
if ((usbGetDriverStateI(qmkusbp->config->usbp) != USB_ACTIVE) || (qmkusbp->state != QMKUSB_READY)) {
|
|
return;
|
|
}
|
|
|
|
/* If there is already a transaction ongoing then another one cannot be
|
|
started.*/
|
|
if (usbGetTransmitStatusI(qmkusbp->config->usbp, qmkusbp->config->bulk_in)) {
|
|
return;
|
|
}
|
|
|
|
/* Checking if there only a buffer partially filled, if so then it is
|
|
enforced in the queue and transmitted.*/
|
|
if (obqTryFlushI(&qmkusbp->obqueue)) {
|
|
size_t n;
|
|
uint8_t *buf = obqGetFullBufferI(&qmkusbp->obqueue, &n);
|
|
|
|
/* For fixed size drivers, fill the end with zeros */
|
|
if (qmkusbp->config->fixed_size) {
|
|
memset(buf + n, 0, qmkusbp->config->in_size - n);
|
|
n = qmkusbp->config->in_size;
|
|
}
|
|
|
|
osalDbgAssert(buf != NULL, "queue is empty");
|
|
|
|
usbStartTransmitI(qmkusbp->config->usbp, qmkusbp->config->bulk_in, buf, n);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Default data transmitted callback.
|
|
* @details The application must use this function as callback for the IN
|
|
* data endpoint.
|
|
*
|
|
* @param[in] usbp pointer to the @p USBDriver object
|
|
* @param[in] ep IN endpoint number
|
|
*/
|
|
void qmkusbDataTransmitted(USBDriver *usbp, usbep_t ep) {
|
|
uint8_t * buf;
|
|
size_t n;
|
|
QMKUSBDriver *qmkusbp = usbp->in_params[ep - 1U];
|
|
|
|
if (qmkusbp == NULL) {
|
|
return;
|
|
}
|
|
|
|
osalSysLockFromISR();
|
|
|
|
/* Signaling that space is available in the output queue.*/
|
|
chnAddFlagsI(qmkusbp, CHN_OUTPUT_EMPTY);
|
|
|
|
/* Freeing the buffer just transmitted, if it was not a zero size packet.*/
|
|
if (usbp->epc[ep]->in_state->txsize > 0U) {
|
|
obqReleaseEmptyBufferI(&qmkusbp->obqueue);
|
|
}
|
|
|
|
/* Checking if there is a buffer ready for transmission.*/
|
|
buf = obqGetFullBufferI(&qmkusbp->obqueue, &n);
|
|
|
|
if (buf != NULL) {
|
|
/* The endpoint cannot be busy, we are in the context of the callback,
|
|
so it is safe to transmit without a check.*/
|
|
usbStartTransmitI(usbp, ep, buf, n);
|
|
} else if ((usbp->epc[ep]->in_state->txsize > 0U) && ((usbp->epc[ep]->in_state->txsize & ((size_t)usbp->epc[ep]->in_maxsize - 1U)) == 0U)) {
|
|
/* Transmit zero sized packet in case the last one has maximum allowed
|
|
size. Otherwise the recipient may expect more data coming soon and
|
|
not return buffered data to app. See section 5.8.3 Bulk Transfer
|
|
Packet Size Constraints of the USB Specification document.*/
|
|
if (!qmkusbp->config->fixed_size) {
|
|
usbStartTransmitI(usbp, ep, usbp->setup, 0);
|
|
}
|
|
|
|
} else {
|
|
/* Nothing to transmit.*/
|
|
}
|
|
|
|
osalSysUnlockFromISR();
|
|
}
|
|
|
|
/**
|
|
* @brief Default data received callback.
|
|
* @details The application must use this function as callback for the OUT
|
|
* data endpoint.
|
|
*
|
|
* @param[in] usbp pointer to the @p USBDriver object
|
|
* @param[in] ep OUT endpoint number
|
|
*/
|
|
void qmkusbDataReceived(USBDriver *usbp, usbep_t ep) {
|
|
QMKUSBDriver *qmkusbp = usbp->out_params[ep - 1U];
|
|
if (qmkusbp == NULL) {
|
|
return;
|
|
}
|
|
|
|
osalSysLockFromISR();
|
|
|
|
/* Signaling that data is available in the input queue.*/
|
|
chnAddFlagsI(qmkusbp, CHN_INPUT_AVAILABLE);
|
|
|
|
/* Posting the filled buffer in the queue.*/
|
|
ibqPostFullBufferI(&qmkusbp->ibqueue, usbGetReceiveTransactionSizeX(qmkusbp->config->usbp, qmkusbp->config->bulk_out));
|
|
|
|
/* 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);
|
|
|
|
osalSysUnlockFromISR();
|
|
}
|
|
|
|
/**
|
|
* @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;
|
|
}
|
|
|
|
/** @} */
|