git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@1351 35acf78f-673a-0410-8e92-d51de3d6d3f4

1 files changed, 178 insertions, 0 deletions

diff --git a/os/hal/src/mac.c b/os/hal/src/mac.c
new file mode 100644
index 000000000..8dfb400aa
--- /dev/null
+++ b/os/hal/src/mac.c
@@ -0,0 +1,178 @@
+/*

+    ChibiOS/RT - Copyright (C) 2006-2007 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 CH_HAL_USE_MAC

+

+/**

+ * @brief MAC Driver initialization.
+ */

+void macInit(void) {

+

+  mac_lld_init();

+}

+

+/**

+ * @brief Initialize the standard part of a @p MACDriver structure.
+ *

+ * @param[in] macp pointer to the @p MACDriver object

+ */

+void macObjectInit(MACDriver *macp) {

+

+  chSemInit(&macp->md_tdsem, 0);

+  chSemInit(&macp->md_rdsem, 0);

+#if CH_USE_EVENTS

+  chEvtInit(&macp->md_rdevent);

+#endif

+}

+

+/**

+ * @brief MAC address setup.

+ *

+ * @param[in] macp pointer to the @p MACDriver object
+ * @param[in] p pointer to a six bytes buffer containing the MAC address. If

+ *            this parameter is set to @p NULL then a system default MAC is

+ *            used.

+ *

+ * @note This function must be invoked only with the driver in the stopped

+ *       state. If invoked on an active interface then it is ignored.
+ */

+void macSetAddress(MACDriver *macp, const uint8_t *p) {

+

+  mac_lld_set_address(macp, p);

+}

+

+/**

+ * @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.
+ */

+msg_t macWaitTransmitDescriptor(MACDriver *macp,

+                                MACTransmitDescriptor *tdp,

+                                systime_t time) {

+  msg_t msg;

+

+  while (((msg = max_lld_get_transmit_descriptor(macp, tdp)) != RDY_OK) &&

+         (time > 0)) {

+    chSysLock();

+    systime_t now = chTimeNow();

+    if ((msg = chSemWaitTimeoutS(&macp->md_tdsem, time)) == RDY_TIMEOUT)

+      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
+ */

+void macReleaseTransmitDescriptor(MACTransmitDescriptor *tdp) {

+

+  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.

+ */

+msg_t macWaitReceiveDescriptor(MACDriver *macp,

+                               MACReceiveDescriptor *rdp,

+                               systime_t time) {

+  msg_t msg;

+

+  while (((msg = max_lld_get_receive_descriptor(macp, rdp)) != RDY_OK) &&

+         (time > 0)) {

+    chSysLock();

+    systime_t now = chTimeNow();

+    if ((msg = chSemWaitTimeoutS(&macp->md_rdsem, time)) == RDY_TIMEOUT)

+      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

+ */

+void macReleaseReceiveDescriptor(MACReceiveDescriptor *rdp) {

+

+  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.
+ */

+bool_t macPollLinkStatus(MACDriver *macp) {

+

+  return mac_lld_poll_link_status(macp);

+}

+

+#endif /* CH_HAL_USE_MAC */

+

+/** @} */