diff options
Diffstat (limited to 'os/hal/src/usb.c')
| -rw-r--r-- | os/hal/src/usb.c | 780 |
1 files changed, 0 insertions, 780 deletions
diff --git a/os/hal/src/usb.c b/os/hal/src/usb.c deleted file mode 100644 index 1da532abf..000000000 --- a/os/hal/src/usb.c +++ /dev/null @@ -1,780 +0,0 @@ -/*
- ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
- 2011,2012,2013 Giovanni Di Sirio.
-
- This file is part of ChibiOS/RT.
-
- ChibiOS/RT is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- ChibiOS/RT is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-/**
- * @file usb.c
- * @brief USB Driver code.
- *
- * @addtogroup USB
- * @{
- */
-
-#include <string.h>
-
-#include "ch.h"
-#include "hal.h"
-#include "usb.h"
-
-#if HAL_USE_USB || defined(__DOXYGEN__)
-
-/*===========================================================================*/
-/* Driver local definitions. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver exported variables. */
-/*===========================================================================*/
-
-/*===========================================================================*/
-/* Driver local variables and types. */
-/*===========================================================================*/
-
-static const uint8_t zero_status[] = {0x00, 0x00};
-static const uint8_t active_status[] ={0x00, 0x00};
-static const uint8_t halted_status[] = {0x01, 0x00};
-
-/*===========================================================================*/
-/* Driver local functions. */
-/*===========================================================================*/
-
-/**
- * @brief SET ADDRESS transaction callback.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- */
-static void set_address(USBDriver *usbp) {
-
- usbp->address = usbp->setup[2];
- usb_lld_set_address(usbp);
- _usb_isr_invoke_event_cb(usbp, USB_EVENT_ADDRESS);
- usbp->state = USB_SELECTED;
-}
-
-/**
- * @brief Standard requests handler.
- * @details This is the standard requests default handler, most standard
- * requests are handled here, the user can override the standard
- * handling using the @p requests_hook_cb hook in the
- * @p USBConfig structure.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @return The request handling exit code.
- * @retval FALSE Request not recognized by the handler or error.
- * @retval TRUE Request handled.
- */
-static bool_t default_handler(USBDriver *usbp) {
- const USBDescriptor *dp;
-
- /* Decoding the request.*/
- switch (((usbp->setup[0] & (USB_RTYPE_RECIPIENT_MASK |
- USB_RTYPE_TYPE_MASK)) |
- (usbp->setup[1] << 8))) {
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_STATUS << 8):
- /* Just returns the current status word.*/
- usbSetupTransfer(usbp, (uint8_t *)&usbp->status, 2, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_CLEAR_FEATURE << 8):
- /* Only the DEVICE_REMOTE_WAKEUP is handled here, any other feature
- number is handled as an error.*/
- if (usbp->setup[2] == USB_FEATURE_DEVICE_REMOTE_WAKEUP) {
- usbp->status &= ~2;
- usbSetupTransfer(usbp, NULL, 0, NULL);
- return TRUE;
- }
- return FALSE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_FEATURE << 8):
- /* Only the DEVICE_REMOTE_WAKEUP is handled here, any other feature
- number is handled as an error.*/
- if (usbp->setup[2] == USB_FEATURE_DEVICE_REMOTE_WAKEUP) {
- usbp->status |= 2;
- usbSetupTransfer(usbp, NULL, 0, NULL);
- return TRUE;
- }
- return FALSE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_ADDRESS << 8):
- /* The SET_ADDRESS handling can be performed here or postponed after
- the status packed depending on the USB_SET_ADDRESS_MODE low
- driver setting.*/
-#if USB_SET_ADDRESS_MODE == USB_EARLY_SET_ADDRESS
- if ((usbp->setup[0] == USB_RTYPE_RECIPIENT_DEVICE) &&
- (usbp->setup[1] == USB_REQ_SET_ADDRESS))
- set_address(usbp);
- usbSetupTransfer(usbp, NULL, 0, NULL);
-#else
- usbSetupTransfer(usbp, NULL, 0, set_address);
-#endif
- return TRUE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_DESCRIPTOR << 8):
- /* Handling descriptor requests from the host.*/
- dp = usbp->config->get_descriptor_cb(
- usbp, usbp->setup[3], usbp->setup[2],
- usbFetchWord(&usbp->setup[4]));
- if (dp == NULL)
- return FALSE;
- usbSetupTransfer(usbp, (uint8_t *)dp->ud_string, dp->ud_size, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_GET_CONFIGURATION << 8):
- /* Returning the last selected configuration.*/
- usbSetupTransfer(usbp, &usbp->configuration, 1, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_CONFIGURATION << 8):
- /* Handling configuration selection from the host.*/
- usbp->configuration = usbp->setup[2];
- if (usbp->configuration == 0)
- usbp->state = USB_SELECTED;
- else
- usbp->state = USB_ACTIVE;
- _usb_isr_invoke_event_cb(usbp, USB_EVENT_CONFIGURED);
- usbSetupTransfer(usbp, NULL, 0, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_GET_STATUS << 8):
- case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_SYNCH_FRAME << 8):
- /* Just sending two zero bytes, the application can change the behavior
- using a hook..*/
- usbSetupTransfer(usbp, (uint8_t *)zero_status, 2, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_GET_STATUS << 8):
- /* Sending the EP status.*/
- if (usbp->setup[4] & 0x80) {
- switch (usb_lld_get_status_in(usbp, usbp->setup[4] & 0x0F)) {
- case EP_STATUS_STALLED:
- usbSetupTransfer(usbp, (uint8_t *)halted_status, 2, NULL);
- return TRUE;
- case EP_STATUS_ACTIVE:
- usbSetupTransfer(usbp, (uint8_t *)active_status, 2, NULL);
- return TRUE;
- default:
- return FALSE;
- }
- }
- else {
- switch (usb_lld_get_status_out(usbp, usbp->setup[4] & 0x0F)) {
- case EP_STATUS_STALLED:
- usbSetupTransfer(usbp, (uint8_t *)halted_status, 2, NULL);
- return TRUE;
- case EP_STATUS_ACTIVE:
- usbSetupTransfer(usbp, (uint8_t *)active_status, 2, NULL);
- return TRUE;
- default:
- return FALSE;
- }
- }
- case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_CLEAR_FEATURE << 8):
- /* Only ENDPOINT_HALT is handled as feature.*/
- if (usbp->setup[2] != USB_FEATURE_ENDPOINT_HALT)
- return FALSE;
- /* Clearing the EP status, not valid for EP0, it is ignored in that case.*/
- if ((usbp->setup[4] & 0x0F) > 0) {
- if (usbp->setup[4] & 0x80)
- usb_lld_clear_in(usbp, usbp->setup[4] & 0x0F);
- else
- usb_lld_clear_out(usbp, usbp->setup[4] & 0x0F);
- }
- usbSetupTransfer(usbp, NULL, 0, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_ENDPOINT | (USB_REQ_SET_FEATURE << 8):
- /* Only ENDPOINT_HALT is handled as feature.*/
- if (usbp->setup[2] != USB_FEATURE_ENDPOINT_HALT)
- return FALSE;
- /* Stalling the EP, not valid for EP0, it is ignored in that case.*/
- if ((usbp->setup[4] & 0x0F) > 0) {
- if (usbp->setup[4] & 0x80)
- usb_lld_stall_in(usbp, usbp->setup[4] & 0x0F);
- else
- usb_lld_stall_out(usbp, usbp->setup[4] & 0x0F);
- }
- usbSetupTransfer(usbp, NULL, 0, NULL);
- return TRUE;
- case USB_RTYPE_RECIPIENT_DEVICE | (USB_REQ_SET_DESCRIPTOR << 8):
- case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_CLEAR_FEATURE << 8):
- case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_SET_FEATURE << 8):
- case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_GET_INTERFACE << 8):
- case USB_RTYPE_RECIPIENT_INTERFACE | (USB_REQ_SET_INTERFACE << 8):
- /* All the above requests are not handled here, if you need them then
- use the hook mechanism and provide handling.*/
- default:
- return FALSE;
- }
-}
-
-/*===========================================================================*/
-/* Driver exported functions. */
-/*===========================================================================*/
-
-/**
- * @brief USB Driver initialization.
- * @note This function is implicitly invoked by @p halInit(), there is
- * no need to explicitly initialize the driver.
- *
- * @init
- */
-void usbInit(void) {
-
- usb_lld_init();
-}
-
-/**
- * @brief Initializes the standard part of a @p USBDriver structure.
- *
- * @param[out] usbp pointer to the @p USBDriver object
- *
- * @init
- */
-void usbObjectInit(USBDriver *usbp) {
- unsigned i;
-
- usbp->state = USB_STOP;
- usbp->config = NULL;
- for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
- usbp->in_params[i] = NULL;
- usbp->out_params[i] = NULL;
- }
- usbp->transmitting = 0;
- usbp->receiving = 0;
-}
-
-/**
- * @brief Configures and activates the USB peripheral.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] config pointer to the @p USBConfig object
- *
- * @api
- */
-void usbStart(USBDriver *usbp, const USBConfig *config) {
- unsigned i;
-
- chDbgCheck((usbp != NULL) && (config != NULL), "usbStart");
-
- chSysLock();
- chDbgAssert((usbp->state == USB_STOP) || (usbp->state == USB_READY),
- "usbStart(), #1", "invalid state");
- usbp->config = config;
- for (i = 0; i <= USB_MAX_ENDPOINTS; i++)
- usbp->epc[i] = NULL;
- usb_lld_start(usbp);
- usbp->state = USB_READY;
- chSysUnlock();
-}
-
-/**
- * @brief Deactivates the USB peripheral.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- *
- * @api
- */
-void usbStop(USBDriver *usbp) {
-
- chDbgCheck(usbp != NULL, "usbStop");
-
- chSysLock();
- chDbgAssert((usbp->state == USB_STOP) || (usbp->state == USB_READY) ||
- (usbp->state == USB_SELECTED) || (usbp->state == USB_ACTIVE),
- "usbStop(), #1", "invalid state");
- usb_lld_stop(usbp);
- usbp->state = USB_STOP;
- chSysUnlock();
-}
-
-/**
- * @brief Enables an endpoint.
- * @details This function enables an endpoint, both IN and/or OUT directions
- * depending on the configuration structure.
- * @note This function must be invoked in response of a SET_CONFIGURATION
- * or SET_INTERFACE message.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- * @param[in] epcp the endpoint configuration
- *
- * @iclass
- */
-void usbInitEndpointI(USBDriver *usbp, usbep_t ep,
- const USBEndpointConfig *epcp) {
-
- chDbgCheckClassI();
- chDbgCheck((usbp != NULL) && (epcp != NULL), "usbInitEndpointI");
- chDbgAssert(usbp->state == USB_ACTIVE,
- "usbEnableEndpointI(), #1", "invalid state");
- chDbgAssert(usbp->epc[ep] == NULL,
- "usbEnableEndpointI(), #2", "already initialized");
-
- /* Logically enabling the endpoint in the USBDriver structure.*/
- if (epcp->in_state != NULL)
- memset(epcp->in_state, 0, sizeof(USBInEndpointState));
- if (epcp->out_state != NULL)
- memset(epcp->out_state, 0, sizeof(USBOutEndpointState));
-
- usbp->epc[ep] = epcp;
-
- /* Low level endpoint activation.*/
- usb_lld_init_endpoint(usbp, ep);
-}
-
-/**
- * @brief Disables all the active endpoints.
- * @details This function disables all the active endpoints except the
- * endpoint zero.
- * @note This function must be invoked in response of a SET_CONFIGURATION
- * message with configuration number zero.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- *
- * @iclass
- */
-void usbDisableEndpointsI(USBDriver *usbp) {
- unsigned i;
-
- chDbgCheckClassI();
- chDbgCheck(usbp != NULL, "usbDisableEndpointsI");
- chDbgAssert(usbp->state == USB_SELECTED,
- "usbDisableEndpointsI(), #1", "invalid state");
-
- usbp->transmitting &= ~1;
- usbp->receiving &= ~1;
- for (i = 1; i <= USB_MAX_ENDPOINTS; i++)
- usbp->epc[i] = NULL;
-
- /* Low level endpoints deactivation.*/
- usb_lld_disable_endpoints(usbp);
-}
-
-/**
- * @brief Prepares for a receive transaction on an OUT endpoint.
- * @post The endpoint is ready for @p usbStartReceiveI().
- * @note This function can be called both in ISR and thread context.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- * @param[out] buf buffer where to copy the received data
- * @param[in] n transaction size
- *
- * @special
- */
-void usbPrepareReceive(USBDriver *usbp, usbep_t ep, uint8_t *buf, size_t n) {
- USBOutEndpointState *osp = usbp->epc[ep]->out_state;
-
- osp->rxqueued = FALSE;
- osp->mode.linear.rxbuf = buf;
- osp->rxsize = n;
- osp->rxcnt = 0;
-
- usb_lld_prepare_receive(usbp, ep);
-}
-
-/**
- * @brief Prepares for a transmit transaction on an IN endpoint.
- * @post The endpoint is ready for @p usbStartTransmitI().
- * @note This function can be called both in ISR and thread context.
- * @note The queue must contain at least the amount of data specified
- * as transaction size.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- * @param[in] buf buffer where to fetch the data to be transmitted
- * @param[in] n transaction size
- *
- * @special
- */
-void usbPrepareTransmit(USBDriver *usbp, usbep_t ep,
- const uint8_t *buf, size_t n) {
- USBInEndpointState *isp = usbp->epc[ep]->in_state;
-
- isp->txqueued = FALSE;
- isp->mode.linear.txbuf = buf;
- isp->txsize = n;
- isp->txcnt = 0;
-
- usb_lld_prepare_transmit(usbp, ep);
-}
-
-/**
- * @brief Prepares for a receive transaction on an OUT endpoint.
- * @post The endpoint is ready for @p usbStartReceiveI().
- * @note This function can be called both in ISR and thread context.
- * @note The queue must have enough free space to accommodate the
- * specified transaction size rounded to the next packet size
- * boundary. For example if the transaction size is 1 and the
- * packet size is 64 then the queue must have space for at least
- * 64 bytes.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- * @param[in] iqp input queue to be filled with incoming data
- * @param[in] n transaction size
- *
- * @special
- */
-void usbPrepareQueuedReceive(USBDriver *usbp, usbep_t ep,
- InputQueue *iqp, size_t n) {
- USBOutEndpointState *osp = usbp->epc[ep]->out_state;
-
- osp->rxqueued = TRUE;
- osp->mode.queue.rxqueue = iqp;
- osp->rxsize = n;
- osp->rxcnt = 0;
-
- usb_lld_prepare_receive(usbp, ep);
-}
-
-/**
- * @brief Prepares for a transmit transaction on an IN endpoint.
- * @post The endpoint is ready for @p usbStartTransmitI().
- * @note This function can be called both in ISR and thread context.
- * @note The transmit transaction size is equal to the data contained
- * in the queue.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- * @param[in] oqp output queue to be fetched for outgoing data
- * @param[in] n transaction size
- *
- * @special
- */
-void usbPrepareQueuedTransmit(USBDriver *usbp, usbep_t ep,
- OutputQueue *oqp, size_t n) {
- USBInEndpointState *isp = usbp->epc[ep]->in_state;
-
- isp->txqueued = TRUE;
- isp->mode.queue.txqueue = oqp;
- isp->txsize = n;
- isp->txcnt = 0;
-
- usb_lld_prepare_transmit(usbp, ep);
-}
-
-/**
- * @brief Starts a receive transaction on an OUT endpoint.
- * @post The endpoint callback is invoked when the transfer has been
- * completed.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- *
- * @return The operation status.
- * @retval FALSE Operation started successfully.
- * @retval TRUE Endpoint busy, operation not started.
- *
- * @iclass
- */
-bool_t usbStartReceiveI(USBDriver *usbp, usbep_t ep) {
-
- chDbgCheckClassI();
- chDbgCheck(usbp != NULL, "usbStartReceiveI");
-
- if (usbGetReceiveStatusI(usbp, ep))
- return TRUE;
-
- usbp->receiving |= (1 << ep);
- usb_lld_start_out(usbp, ep);
- return FALSE;
-}
-
-/**
- * @brief Starts a transmit transaction on an IN endpoint.
- * @post The endpoint callback is invoked when the transfer has been
- * completed.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- *
- * @return The operation status.
- * @retval FALSE Operation started successfully.
- * @retval TRUE Endpoint busy, operation not started.
- *
- * @iclass
- */
-bool_t usbStartTransmitI(USBDriver *usbp, usbep_t ep) {
-
- chDbgCheckClassI();
- chDbgCheck(usbp != NULL, "usbStartTransmitI");
-
- if (usbGetTransmitStatusI(usbp, ep))
- return TRUE;
-
- usbp->transmitting |= (1 << ep);
- usb_lld_start_in(usbp, ep);
- return FALSE;
-}
-
-/**
- * @brief Stalls an OUT endpoint.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- *
- * @return The operation status.
- * @retval FALSE Endpoint stalled.
- * @retval TRUE Endpoint busy, not stalled.
- *
- * @iclass
- */
-bool_t usbStallReceiveI(USBDriver *usbp, usbep_t ep) {
-
- chDbgCheckClassI();
- chDbgCheck(usbp != NULL, "usbStallReceiveI");
-
- if (usbGetReceiveStatusI(usbp, ep))
- return TRUE;
-
- usb_lld_stall_out(usbp, ep);
- return FALSE;
-}
-
-/**
- * @brief Stalls an IN endpoint.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number
- *
- * @return The operation status.
- * @retval FALSE Endpoint stalled.
- * @retval TRUE Endpoint busy, not stalled.
- *
- * @iclass
- */
-bool_t usbStallTransmitI(USBDriver *usbp, usbep_t ep) {
-
- chDbgCheckClassI();
- chDbgCheck(usbp != NULL, "usbStallTransmitI");
-
- if (usbGetTransmitStatusI(usbp, ep))
- return TRUE;
-
- usb_lld_stall_in(usbp, ep);
- return FALSE;
-}
-
-/**
- * @brief USB reset routine.
- * @details This function must be invoked when an USB bus reset condition is
- * detected.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- *
- * @notapi
- */
-void _usb_reset(USBDriver *usbp) {
- unsigned i;
-
- usbp->state = USB_READY;
- usbp->status = 0;
- usbp->address = 0;
- usbp->configuration = 0;
- usbp->transmitting = 0;
- usbp->receiving = 0;
-
- /* Invalidates all endpoints into the USBDriver structure.*/
- for (i = 0; i <= USB_MAX_ENDPOINTS; i++)
- usbp->epc[i] = NULL;
-
- /* EP0 state machine initialization.*/
- usbp->ep0state = USB_EP0_WAITING_SETUP;
-
- /* Low level reset.*/
- usb_lld_reset(usbp);
-}
-
-/**
- * @brief Default EP0 SETUP callback.
- * @details This function is used by the low level driver as default handler
- * for EP0 SETUP events.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number, always zero
- *
- * @notapi
- */
-void _usb_ep0setup(USBDriver *usbp, usbep_t ep) {
- size_t max;
-
- usbp->ep0state = USB_EP0_WAITING_SETUP;
- usbReadSetup(usbp, ep, usbp->setup);
-
- /* First verify if the application has an handler installed for this
- request.*/
- if (!(usbp->config->requests_hook_cb) ||
- !(usbp->config->requests_hook_cb(usbp))) {
- /* Invoking the default handler, if this fails then stalls the
- endpoint zero as error.*/
- if (((usbp->setup[0] & USB_RTYPE_TYPE_MASK) != USB_RTYPE_TYPE_STD) ||
- !default_handler(usbp)) {
- /* Error response, the state machine goes into an error state, the low
- level layer will have to reset it to USB_EP0_WAITING_SETUP after
- receiving a SETUP packet.*/
- usb_lld_stall_in(usbp, 0);
- usb_lld_stall_out(usbp, 0);
- _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED);
- usbp->ep0state = USB_EP0_ERROR;
- return;
- }
- }
-
- /* Transfer preparation. The request handler must have populated
- correctly the fields ep0next, ep0n and ep0endcb using the macro
- usbSetupTransfer().*/
- max = usbFetchWord(&usbp->setup[6]);
- /* The transfer size cannot exceed the specified amount.*/
- if (usbp->ep0n > max)
- usbp->ep0n = max;
- if ((usbp->setup[0] & USB_RTYPE_DIR_MASK) == USB_RTYPE_DIR_DEV2HOST) {
- /* IN phase.*/
- if (usbp->ep0n > 0) {
- /* Starts the transmit phase.*/
- usbp->ep0state = USB_EP0_TX;
- usbPrepareTransmit(usbp, 0, usbp->ep0next, usbp->ep0n);
- chSysLockFromIsr();
- usbStartTransmitI(usbp, 0);
- chSysUnlockFromIsr();
- }
- else {
- /* No transmission phase, directly receiving the zero sized status
- packet.*/
- usbp->ep0state = USB_EP0_WAITING_STS;
- usbPrepareReceive(usbp, 0, NULL, 0);
- chSysLockFromIsr();
- usbStartReceiveI(usbp, 0);
- chSysUnlockFromIsr();
- }
- }
- else {
- /* OUT phase.*/
- if (usbp->ep0n > 0) {
- /* Starts the receive phase.*/
- usbp->ep0state = USB_EP0_RX;
- usbPrepareReceive(usbp, 0, usbp->ep0next, usbp->ep0n);
- chSysLockFromIsr();
- usbStartReceiveI(usbp, 0);
- chSysUnlockFromIsr();
- }
- else {
- /* No receive phase, directly sending the zero sized status
- packet.*/
- usbp->ep0state = USB_EP0_SENDING_STS;
- usbPrepareTransmit(usbp, 0, NULL, 0);
- chSysLockFromIsr();
- usbStartTransmitI(usbp, 0);
- chSysUnlockFromIsr();
- }
- }
-}
-
-/**
- * @brief Default EP0 IN callback.
- * @details This function is used by the low level driver as default handler
- * for EP0 IN events.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number, always zero
- *
- * @notapi
- */
-void _usb_ep0in(USBDriver *usbp, usbep_t ep) {
- size_t max;
-
- (void)ep;
- switch (usbp->ep0state) {
- case USB_EP0_TX:
- max = usbFetchWord(&usbp->setup[6]);
- /* If the transmitted size is less than the requested size and it is a
- multiple of the maximum packet size then a zero size packet must be
- transmitted.*/
- if ((usbp->ep0n < max) && ((usbp->ep0n % usbp->epc[0]->in_maxsize) == 0)) {
- usbPrepareTransmit(usbp, 0, NULL, 0);
- chSysLockFromIsr();
- usbStartTransmitI(usbp, 0);
- chSysUnlockFromIsr();
- usbp->ep0state = USB_EP0_WAITING_TX0;
- return;
- }
- /* Falls into, it is intentional.*/
- case USB_EP0_WAITING_TX0:
- /* Transmit phase over, receiving the zero sized status packet.*/
- usbp->ep0state = USB_EP0_WAITING_STS;
- usbPrepareReceive(usbp, 0, NULL, 0);
- chSysLockFromIsr();
- usbStartReceiveI(usbp, 0);
- chSysUnlockFromIsr();
- return;
- case USB_EP0_SENDING_STS:
- /* Status packet sent, invoking the callback if defined.*/
- if (usbp->ep0endcb != NULL)
- usbp->ep0endcb(usbp);
- usbp->ep0state = USB_EP0_WAITING_SETUP;
- return;
- default:
- ;
- }
- /* Error response, the state machine goes into an error state, the low
- level layer will have to reset it to USB_EP0_WAITING_SETUP after
- receiving a SETUP packet.*/
- usb_lld_stall_in(usbp, 0);
- usb_lld_stall_out(usbp, 0);
- _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED);
- usbp->ep0state = USB_EP0_ERROR;
-}
-
-/**
- * @brief Default EP0 OUT callback.
- * @details This function is used by the low level driver as default handler
- * for EP0 OUT events.
- *
- * @param[in] usbp pointer to the @p USBDriver object
- * @param[in] ep endpoint number, always zero
- *
- * @notapi
- */
-void _usb_ep0out(USBDriver *usbp, usbep_t ep) {
-
- (void)ep;
- switch (usbp->ep0state) {
- case USB_EP0_RX:
- /* Receive phase over, sending the zero sized status packet.*/
- usbp->ep0state = USB_EP0_SENDING_STS;
- usbPrepareTransmit(usbp, 0, NULL, 0);
- chSysLockFromIsr();
- usbStartTransmitI(usbp, 0);
- chSysUnlockFromIsr();
- return;
- case USB_EP0_WAITING_STS:
- /* Status packet received, it must be zero sized, invoking the callback
- if defined.*/
- if (usbGetReceiveTransactionSizeI(usbp, 0) != 0)
- break;
- if (usbp->ep0endcb != NULL)
- usbp->ep0endcb(usbp);
- usbp->ep0state = USB_EP0_WAITING_SETUP;
- return;
- default:
- ;
- }
- /* Error response, the state machine goes into an error state, the low
- level layer will have to reset it to USB_EP0_WAITING_SETUP after
- receiving a SETUP packet.*/
- usb_lld_stall_in(usbp, 0);
- usb_lld_stall_out(usbp, 0);
- _usb_isr_invoke_event_cb(usbp, USB_EVENT_STALLED);
- usbp->ep0state = USB_EP0_ERROR;
-}
-
-#endif /* HAL_USE_USB */
-
-/** @} */
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