diff options
Diffstat (limited to 'os/hal/platforms/AT91SAM7/mac_lld.h')
| -rw-r--r-- | os/hal/platforms/AT91SAM7/mac_lld.h | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/os/hal/platforms/AT91SAM7/mac_lld.h b/os/hal/platforms/AT91SAM7/mac_lld.h new file mode 100644 index 000000000..5184be954 --- /dev/null +++ b/os/hal/platforms/AT91SAM7/mac_lld.h @@ -0,0 +1,192 @@ +/*
+ 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 AT91SAM7/mac_lld.h
+ * @brief AT91SAM7 low level MAC driver header
+ * @addtogroup AT91SAM7_MAC
+ * @{
+ */
+
+#ifndef _MAC_LLD_H_
+#define _MAC_LLD_H_
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief Number of available transmit buffers.
+ */
+#if !defined(MAC_TRANSMIT_BUFFERS) || defined(__DOXYGEN__)
+#define MAC_TRANSMIT_BUFFERS 2
+#endif
+
+/**
+ * @brief Number of available receive buffers.
+ */
+#if !defined(MAC_RECEIVE_BUFFERS) || defined(__DOXYGEN__)
+#define MAC_RECEIVE_BUFFERS 2
+#endif
+
+/**
+ * @brief Maximum supported frame size.
+ */
+#if !defined(MAC_BUFFERS_SIZE) || defined(__DOXYGEN__)
+#define MAC_BUFFERS_SIZE 1518
+#endif
+
+/*===========================================================================*/
+/* EMAC specific settings. */
+/*===========================================================================*/
+
+/**
+ * @brief Interrupt priority level for the EMAC device.
+ */
+#if !defined(EMAC_INTERRUPT_PRIORITY) || defined(__DOXYGEN__)
+#define EMAC_INTERRUPT_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 3)
+#endif
+
+/*===========================================================================*/
+/* EMAC specific constants. */
+/*===========================================================================*/
+
+#define EMAC_RECEIVE_BUFFERS_SIZE 128 /* Do not modify */
+#define EMAC_TRANSMIT_BUFFERS_SIZE MAC_BUFFERS_SIZE
+#define EMAC_RECEIVE_DESCRIPTORS \
+ (((((MAC_BUFFERS_SIZE - 1) | (EMAC_RECEIVE_BUFFERS_SIZE - 1)) + 1) \
+ / EMAC_RECEIVE_BUFFERS_SIZE) * MAC_RECEIVE_BUFFERS)
+#define EMAC_TRANSMIT_DESCRIPTORS MAC_TRANSMIT_BUFFERS
+
+#define W1_R_OWNERSHIP 0x00000001
+#define W1_R_WRAP 0x00000002
+#define W1_R_ADDRESS_MASK 0xFFFFFFFC
+
+#define W2_R_LENGTH_MASK 0x00000FFF
+#define W2_R_FRAME_START 0x00004000
+#define W2_R_FRAME_END 0x00008000
+#define W2_R_CFI 0x00010000
+#define W2_R_VLAN_PRIO_MASK 0x000E0000
+#define W2_R_PRIO_TAG_DETECTED 0x00100000
+#define W2_R_VLAN_TAG_DETECTED 0x00200000
+#define W2_R_TYPE_ID_MATCH 0x00400000
+#define W2_R_ADDR4_MATCH 0x00800000
+#define W2_R_ADDR3_MATCH 0x01000000
+#define W2_R_ADDR2_MATCH 0x02000000
+#define W2_R_ADDR1_MATCH 0x04000000
+#define W2_R_RFU1 0x08000000
+#define W2_R_ADDR_EXT_MATCH 0x10000000
+#define W2_R_UNICAST_MATCH 0x20000000
+#define W2_R_MULTICAST_MATCH 0x40000000
+#define W2_R_BROADCAST_DETECTED 0x80000000
+
+#define W1_T_ADDRESS_MASK 0xFFFFFFFF
+
+#define W2_T_LENGTH_MASK 0x000007FF
+#define W2_T_LOCKED 0x00000800 /* Not an EMAC flag, used by the driver */
+#define W2_T_RFU1 0x00003000
+#define W2_T_LAST_BUFFER 0x00008000
+#define W2_T_NO_CRC 0x00010000
+#define W2_T_RFU2 0x07FE0000
+#define W2_T_BUFFERS_EXHAUSTED 0x08000000
+#define W2_T_TRANSMIT_UNDERRUN 0x10000000
+#define W2_T_RETRY_LIMIT_EXC 0x20000000
+#define W2_T_WRAP 0x40000000
+#define W2_T_USED 0x80000000
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Structure representing a buffer physical descriptor.
+ * @note It represents both descriptor types.
+ */
+typedef struct {
+ uint32_t w1;
+ uint32_t w2;
+} EMACDescriptor;
+
+/**
+ * @brief Structure representing a MAC driver.
+ */
+typedef struct {
+ Semaphore md_tdsem; /**< Transmit semaphore. */
+ Semaphore md_rdsem; /**< Receive semaphore. */
+#if CH_USE_EVENTS
+ EventSource md_rdevent; /**< Receive event source. */
+#endif
+ /* End of the mandatory fields.*/
+} MACDriver;
+
+/**
+ * @brief Structure representing a transmit descriptor.
+ */
+typedef struct {
+ size_t td_offset; /**< Current write offset. */
+ size_t td_size; /**< Available space size. */
+ /* End of the mandatory fields.*/
+ EMACDescriptor *td_physdesc; /**< Pointer to the physical
+ descriptor. */
+} MACTransmitDescriptor;
+
+/**
+ * @brief Structure representing a receive descriptor.
+ */
+typedef struct {
+ size_t rd_offset; /**< Current read offset. */
+ size_t rd_size; /**< Available data size. */
+ /* End of the mandatory fields.*/
+ EMACDescriptor *rd_physdesc; /**< Pointer to the first descriptor
+ of the buffers chain. */
+} MACReceiveDescriptor;
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+/** @cond never*/
+extern MACDriver ETH1;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void mac_lld_init(void);
+ void mac_lld_set_address(MACDriver *macp, const uint8_t *p);
+ msg_t max_lld_get_transmit_descriptor(MACDriver *macp,
+ MACTransmitDescriptor *tdp);
+ size_t mac_lld_write_transmit_descriptor(MACTransmitDescriptor *tdp,
+ uint8_t *buf,
+ size_t size);
+ void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp);
+ msg_t max_lld_get_receive_descriptor(MACDriver *macp,
+ MACReceiveDescriptor *rdp);
+ size_t mac_lld_read_receive_descriptor(MACReceiveDescriptor *rdp,
+ uint8_t *buf,
+ size_t size);
+ void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp);
+ bool_t mac_lld_poll_link_status(MACDriver *macp);
+#ifdef __cplusplus
+}
+#endif
+/** @endcond*/
+
+#endif /* _MAC_LLD_H_ */
+
+/** @} */
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