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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-15 15:58:20 +0000 |
| commit | 7c68ef157d009f9932ac47ba21ba5d74e321623f (patch) | |
| tree | 6c2442ca44cd090656ec3059ffb959f3d747e18d /os/hal/src/mac.c | |
| parent | 076746af63d317f8e96766b9137a65679f60463f (diff) | |
| parent | e0d850113610f3efa0c0ac4946901f683e5e7332 (diff) | |
| download | ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.gz ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.tar.bz2 ChibiOS-7c68ef157d009f9932ac47ba21ba5d74e321623f.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@5854 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/src/mac.c')
| -rw-r--r-- | os/hal/src/mac.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/os/hal/src/mac.c b/os/hal/src/mac.c new file mode 100644 index 000000000..cb62db612 --- /dev/null +++ b/os/hal/src/mac.c @@ -0,0 +1,272 @@ +/*
+ 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 mac.c
+ * @brief MAC Driver code.
+ *
+ * @addtogroup MAC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_MAC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+#if MAC_USE_ZERO_COPY && !MAC_SUPPORTS_ZERO_COPY
+#error "MAC_USE_ZERO_COPY not supported by this implementation"
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief MAC Driver initialization.
+ * @note This function is implicitly invoked by @p halInit(), there is
+ * no need to explicitly initialize the driver.
+ *
+ * @init
+ */
+void macInit(void) {
+
+ mac_lld_init();
+}
+
+/**
+ * @brief Initialize the standard part of a @p MACDriver structure.
+ *
+ * @param[out] macp pointer to the @p MACDriver object
+ *
+ * @init
+ */
+void macObjectInit(MACDriver *macp) {
+
+ macp->state = MAC_STOP;
+ macp->config = NULL;
+ chSemInit(&macp->tdsem, 0);
+ chSemInit(&macp->rdsem, 0);
+#if MAC_USE_EVENTS
+ chEvtInit(&macp->rdevent);
+#endif
+}
+
+/**
+ * @brief Configures and activates the MAC peripheral.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[in] config pointer to the @p MACConfig object
+ *
+ * @api
+ */
+void macStart(MACDriver *macp, const MACConfig *config) {
+
+ chDbgCheck((macp != NULL) && (config != NULL), "macStart");
+
+ chSysLock();
+ chDbgAssert(macp->state == MAC_STOP,
+ "macStart(), #1", "invalid state");
+ macp->config = config;
+ mac_lld_start(macp);
+ macp->state = MAC_ACTIVE;
+ chSysUnlock();
+}
+
+/**
+ * @brief Deactivates the MAC peripheral.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ *
+ * @api
+ */
+void macStop(MACDriver *macp) {
+
+ chDbgCheck(macp != NULL, "macStop");
+
+ chSysLock();
+ chDbgAssert((macp->state == MAC_STOP) || (macp->state == MAC_ACTIVE),
+ "macStop(), #1", "invalid state");
+ mac_lld_stop(macp);
+ macp->state = MAC_STOP;
+ chSysUnlock();
+}
+
+/**
+ * @brief Allocates a transmission descriptor.
+ * @details One of the available transmission descriptors is locked and
+ * returned. If a descriptor is not currently available then the
+ * invoking thread is queued until one is freed.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[out] tdp pointer to a @p MACTransmitDescriptor structure
+ * @param[in] time the number of ticks before the operation timeouts,
+ * the following special values are allowed:
+ * - @a TIME_IMMEDIATE immediate timeout.
+ * - @a TIME_INFINITE no timeout.
+ * .
+ * @return The operation status.
+ * @retval RDY_OK the descriptor was obtained.
+ * @retval RDY_TIMEOUT the operation timed out, descriptor not initialized.
+ *
+ * @api
+ */
+msg_t macWaitTransmitDescriptor(MACDriver *macp,
+ MACTransmitDescriptor *tdp,
+ systime_t time) {
+ msg_t msg;
+ systime_t now;
+
+ chDbgCheck((macp != NULL) && (tdp != NULL), "macWaitTransmitDescriptor");
+ chDbgAssert(macp->state == MAC_ACTIVE, "macWaitTransmitDescriptor(), #1",
+ "not active");
+
+ while (((msg = mac_lld_get_transmit_descriptor(macp, tdp)) != RDY_OK) &&
+ (time > 0)) {
+ chSysLock();
+ now = chTimeNow();
+ if ((msg = chSemWaitTimeoutS(&macp->tdsem, time)) == RDY_TIMEOUT) {
+ chSysUnlock();
+ break;
+ }
+ if (time != TIME_INFINITE)
+ time -= (chTimeNow() - now);
+ chSysUnlock();
+ }
+ return msg;
+}
+
+/**
+ * @brief Releases a transmit descriptor and starts the transmission of the
+ * enqueued data as a single frame.
+ *
+ * @param[in] tdp the pointer to the @p MACTransmitDescriptor structure
+ *
+ * @api
+ */
+void macReleaseTransmitDescriptor(MACTransmitDescriptor *tdp) {
+
+ chDbgCheck((tdp != NULL), "macReleaseTransmitDescriptor");
+
+ mac_lld_release_transmit_descriptor(tdp);
+}
+
+/**
+ * @brief Waits for a received frame.
+ * @details Stops until a frame is received and buffered. If a frame is
+ * not immediately available then the invoking thread is queued
+ * until one is received.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[out] rdp pointer to a @p MACReceiveDescriptor structure
+ * @param[in] time the number of ticks before the operation timeouts,
+ * the following special values are allowed:
+ * - @a TIME_IMMEDIATE immediate timeout.
+ * - @a TIME_INFINITE no timeout.
+ * .
+ * @return The operation status.
+ * @retval RDY_OK the descriptor was obtained.
+ * @retval RDY_TIMEOUT the operation timed out, descriptor not initialized.
+ *
+ * @api
+ */
+msg_t macWaitReceiveDescriptor(MACDriver *macp,
+ MACReceiveDescriptor *rdp,
+ systime_t time) {
+ msg_t msg;
+ systime_t now;
+
+ chDbgCheck((macp != NULL) && (rdp != NULL), "macWaitReceiveDescriptor");
+ chDbgAssert(macp->state == MAC_ACTIVE, "macWaitReceiveDescriptor(), #1",
+ "not active");
+
+ while (((msg = mac_lld_get_receive_descriptor(macp, rdp)) != RDY_OK) &&
+ (time > 0)) {
+ chSysLock();
+ now = chTimeNow();
+ if ((msg = chSemWaitTimeoutS(&macp->rdsem, time)) == RDY_TIMEOUT) {
+ chSysUnlock();
+ break;
+ }
+ if (time != TIME_INFINITE)
+ time -= (chTimeNow() - now);
+ chSysUnlock();
+ }
+ return msg;
+}
+
+/**
+ * @brief Releases a receive descriptor.
+ * @details The descriptor and its buffer are made available for more incoming
+ * frames.
+ *
+ * @param[in] rdp the pointer to the @p MACReceiveDescriptor structure
+ *
+ * @api
+ */
+void macReleaseReceiveDescriptor(MACReceiveDescriptor *rdp) {
+
+ chDbgCheck((rdp != NULL), "macReleaseReceiveDescriptor");
+
+ mac_lld_release_receive_descriptor(rdp);
+}
+
+/**
+ * @brief Updates and returns the link status.
+ *
+ * @param[in] macp pointer to the @p MACDriver object
+ * @return The link status.
+ * @retval TRUE if the link is active.
+ * @retval FALSE if the link is down.
+ *
+ * @api
+ */
+bool_t macPollLinkStatus(MACDriver *macp) {
+
+ chDbgCheck((macp != NULL), "macPollLinkStatus");
+ chDbgAssert(macp->state == MAC_ACTIVE, "macPollLinkStatus(), #1",
+ "not active");
+
+ return mac_lld_poll_link_status(macp);
+}
+
+#endif /* HAL_USE_MAC */
+
+/** @} */
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