diff options
Diffstat (limited to 'os/hal/src/hal_serial_usb.c')
| -rw-r--r-- | os/hal/src/hal_serial_usb.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/os/hal/src/hal_serial_usb.c b/os/hal/src/hal_serial_usb.c new file mode 100644 index 000000000..9c21f7b56 --- /dev/null +++ b/os/hal/src/hal_serial_usb.c @@ -0,0 +1,502 @@ +/*
+ 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 serial_usb.c
+ * @brief Serial over USB Driver code.
+ *
+ * @addtogroup SERIAL_USB
+ * @{
+ */
+
+#include "hal.h"
+
+#if (HAL_USE_SERIAL_USB == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* 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. */
+/*===========================================================================*/
+
+/*
+ * Interface implementation.
+ */
+
+static size_t write(void *ip, const uint8_t *bp, size_t n) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return 0;
+ }
+
+ return obqWriteTimeout(&((SerialUSBDriver *)ip)->obqueue, bp,
+ n, TIME_INFINITE);
+}
+
+static size_t read(void *ip, uint8_t *bp, size_t n) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return 0;
+ }
+
+ return ibqReadTimeout(&((SerialUSBDriver *)ip)->ibqueue, bp,
+ n, TIME_INFINITE);
+}
+
+static msg_t put(void *ip, uint8_t b) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return MSG_RESET;
+ }
+
+ return obqPutTimeout(&((SerialUSBDriver *)ip)->obqueue, b, TIME_INFINITE);
+}
+
+static msg_t get(void *ip) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return MSG_RESET;
+ }
+
+ return ibqGetTimeout(&((SerialUSBDriver *)ip)->ibqueue, TIME_INFINITE);
+}
+
+static msg_t putt(void *ip, uint8_t b, systime_t timeout) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return MSG_RESET;
+ }
+
+ return obqPutTimeout(&((SerialUSBDriver *)ip)->obqueue, b, timeout);
+}
+
+static msg_t gett(void *ip, systime_t timeout) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return MSG_RESET;
+ }
+
+ return ibqGetTimeout(&((SerialUSBDriver *)ip)->ibqueue, timeout);
+}
+
+static size_t writet(void *ip, const uint8_t *bp, size_t n, systime_t timeout) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return 0;
+ }
+
+ return obqWriteTimeout(&((SerialUSBDriver *)ip)->obqueue, bp, n, timeout);
+}
+
+static size_t readt(void *ip, uint8_t *bp, size_t n, systime_t timeout) {
+
+ if (usbGetDriverStateI(((SerialUSBDriver *)ip)->config->usbp) != USB_ACTIVE) {
+ return 0;
+ }
+
+ return ibqReadTimeout(&((SerialUSBDriver *)ip)->ibqueue, bp, n, timeout);
+}
+
+static const struct SerialUSBDriverVMT vmt = {
+ 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) {
+ SerialUSBDriver *sdup = bqGetLinkX(bqp);
+
+ /* If the USB driver is not in the appropriate state then transactions
+ must not be started.*/
+ if ((usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE) ||
+ (sdup->state != SDU_READY)) {
+ return;
+ }
+
+ /* Checking if there is already a transaction ongoing on the endpoint.*/
+ if (!usbGetReceiveStatusI(sdup->config->usbp, sdup->config->bulk_out)) {
+ /* Trying to get a free buffer.*/
+ uint8_t *buf = ibqGetEmptyBufferI(&sdup->ibqueue);
+ if (buf != NULL) {
+ /* Buffer found, starting a new transaction.*/
+ usbStartReceiveI(sdup->config->usbp, sdup->config->bulk_out,
+ buf, SERIAL_USB_BUFFERS_SIZE);
+ }
+ }
+}
+
+/**
+ * @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;
+ SerialUSBDriver *sdup = bqGetLinkX(bqp);
+
+ /* If the USB driver is not in the appropriate state then transactions
+ must not be started.*/
+ if ((usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE) ||
+ (sdup->state != SDU_READY)) {
+ return;
+ }
+
+ /* Checking if there is already a transaction ongoing on the endpoint.*/
+ if (!usbGetTransmitStatusI(sdup->config->usbp, sdup->config->bulk_in)) {
+ /* Trying to get a full buffer.*/
+ uint8_t *buf = obqGetFullBufferI(&sdup->obqueue, &n);
+ if (buf != NULL) {
+ /* Buffer found, starting a new transaction.*/
+ usbStartTransmitI(sdup->config->usbp, sdup->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 sduInit(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] sdup pointer to a @p SerialUSBDriver structure
+ *
+ * @init
+ */
+void sduObjectInit(SerialUSBDriver *sdup) {
+
+ sdup->vmt = &vmt;
+ osalEventObjectInit(&sdup->event);
+ sdup->state = SDU_STOP;
+ ibqObjectInit(&sdup->ibqueue, sdup->ib,
+ SERIAL_USB_BUFFERS_SIZE, SERIAL_USB_BUFFERS_NUMBER,
+ ibnotify, sdup);
+ obqObjectInit(&sdup->obqueue, sdup->ob,
+ SERIAL_USB_BUFFERS_SIZE, SERIAL_USB_BUFFERS_NUMBER,
+ obnotify, sdup);
+}
+
+/**
+ * @brief Configures and starts the driver.
+ *
+ * @param[in] sdup pointer to a @p SerialUSBDriver object
+ * @param[in] config the serial over USB driver configuration
+ *
+ * @api
+ */
+void sduStart(SerialUSBDriver *sdup, const SerialUSBConfig *config) {
+ USBDriver *usbp = config->usbp;
+
+ osalDbgCheck(sdup != NULL);
+
+ osalSysLock();
+ osalDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY),
+ "invalid state");
+ usbp->in_params[config->bulk_in - 1U] = sdup;
+ usbp->out_params[config->bulk_out - 1U] = sdup;
+ if (config->int_in > 0U) {
+ usbp->in_params[config->int_in - 1U] = sdup;
+ }
+ sdup->config = config;
+ sdup->state = SDU_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] sdup pointer to a @p SerialUSBDriver object
+ *
+ * @api
+ */
+void sduStop(SerialUSBDriver *sdup) {
+ USBDriver *usbp = sdup->config->usbp;
+
+ osalDbgCheck(sdup != NULL);
+
+ osalSysLock();
+ osalDbgAssert((sdup->state == SDU_STOP) || (sdup->state == SDU_READY),
+ "invalid state");
+
+ /* Driver in stopped state.*/
+ usbp->in_params[sdup->config->bulk_in - 1U] = NULL;
+ usbp->out_params[sdup->config->bulk_out - 1U] = NULL;
+ if (sdup->config->int_in > 0U) {
+ usbp->in_params[sdup->config->int_in - 1U] = NULL;
+ }
+ sdup->state = SDU_STOP;
+
+ /* Enforces a disconnection.*/
+ sduDisconnectI(sdup);
+ osalOsRescheduleS();
+ osalSysUnlock();
+}
+
+/**
+ * @brief USB device disconnection handler.
+ * @note If this function is not called from an ISR then an explicit call
+ * to @p osalOsRescheduleS() in necessary afterward.
+ *
+ * @param[in] sdup pointer to a @p SerialUSBDriver object
+ *
+ * @iclass
+ */
+void sduDisconnectI(SerialUSBDriver *sdup) {
+
+ /* Queues reset in order to signal the driver stop to the application.*/
+ chnAddFlagsI(sdup, CHN_DISCONNECTED);
+ ibqResetI(&sdup->ibqueue);
+ obqResetI(&sdup->obqueue);
+}
+
+/**
+ * @brief USB device configured handler.
+ *
+ * @param[in] sdup pointer to a @p SerialUSBDriver object
+ *
+ * @iclass
+ */
+void sduConfigureHookI(SerialUSBDriver *sdup) {
+ uint8_t *buf;
+
+ ibqResetI(&sdup->ibqueue);
+ obqResetI(&sdup->obqueue);
+ chnAddFlagsI(sdup, CHN_CONNECTED);
+
+ /* Starts the first OUT transaction immediately.*/
+ buf = ibqGetEmptyBufferI(&sdup->ibqueue);
+
+ osalDbgAssert(buf != NULL, "no free buffer");
+
+ usbStartReceiveI(sdup->config->usbp, sdup->config->bulk_out,
+ buf, SERIAL_USB_BUFFERS_SIZE);
+}
+
+/**
+ * @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 sduRequestsHook(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] sdup pointer to a @p SerialUSBDriver object
+ *
+ * @iclass
+ */
+void sduSOFHookI(SerialUSBDriver *sdup) {
+
+ /* If the USB driver is not in the appropriate state then transactions
+ must not be started.*/
+ if ((usbGetDriverStateI(sdup->config->usbp) != USB_ACTIVE) ||
+ (sdup->state != SDU_READY)) {
+ return;
+ }
+
+ /* If there is already a transaction ongoing then another one cannot be
+ started.*/
+ if (usbGetTransmitStatusI(sdup->config->usbp, sdup->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(&sdup->obqueue)) {
+ size_t n;
+ uint8_t *buf = obqGetFullBufferI(&sdup->obqueue, &n);
+
+ osalDbgAssert(buf != NULL, "queue is empty");
+
+ usbStartTransmitI(sdup->config->usbp, sdup->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 sduDataTransmitted(USBDriver *usbp, usbep_t ep) {
+ uint8_t *buf;
+ size_t n;
+ SerialUSBDriver *sdup = usbp->in_params[ep - 1U];
+
+ if (sdup == NULL) {
+ return;
+ }
+
+ osalSysLockFromISR();
+
+ /* Signaling that space is available in the output queue.*/
+ chnAddFlagsI(sdup, 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(&sdup->obqueue);
+ }
+
+ /* Checking if there is a buffer ready for transmission.*/
+ buf = obqGetFullBufferI(&sdup->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.*/
+ 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 sduDataReceived(USBDriver *usbp, usbep_t ep) {
+ uint8_t *buf;
+ SerialUSBDriver *sdup = usbp->out_params[ep - 1U];
+
+ if (sdup == NULL) {
+ return;
+ }
+
+ osalSysLockFromISR();
+
+ /* Signaling that data is available in the input queue.*/
+ chnAddFlagsI(sdup, CHN_INPUT_AVAILABLE);
+
+ /* Posting the filled buffer in the queue.*/
+ ibqPostFullBufferI(&sdup->ibqueue,
+ usbGetReceiveTransactionSizeX(sdup->config->usbp,
+ sdup->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.*/
+ buf = ibqGetEmptyBufferI(&sdup->ibqueue);
+ if (buf != NULL) {
+ /* Buffer found, starting a new transaction.*/
+ usbStartReceiveI(sdup->config->usbp, sdup->config->bulk_out,
+ buf, SERIAL_USB_BUFFERS_SIZE);
+ }
+ 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 sduInterruptTransmitted(USBDriver *usbp, usbep_t ep) {
+
+ (void)usbp;
+ (void)ep;
+}
+
+#endif /* HAL_USE_SERIAL_USB == TRUE */
+
+/** @} */
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