336 lines
8.7 KiB
C
336 lines
8.7 KiB
C
/* KSDK Ethernet Driver
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*
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* Copyright (c) 2016 ARM Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* The driver performs one shot PHY setup. There is no support for
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* PHY disconnect, reconnect or configuration change. The PHY setup,
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* implemented via KSDK contains polled code that can block the
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* initialization thread for a few seconds.
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*
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* There is no statistics collection for either normal operation or
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* error behaviour.
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*/
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#include <board.h>
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#include <device.h>
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#include <misc/util.h>
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#include <nanokernel.h>
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#include <net/ip/net_driver_ethernet.h>
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#include "fsl_enet.h"
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#include "fsl_phy.h"
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#include "fsl_port.h"
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#define SYS_LOG_DOMAIN "ETH KSDK"
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#define SYS_LOG_LEVEL CONFIG_SYS_LOG_ETHERNET_LEVEL
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#include <misc/sys_log.h>
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struct eth_context {
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enet_handle_t enet_handle;
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struct nano_sem tx_buf_sem;
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uint8_t mac_addr[6];
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};
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static int eth_net_tx(struct net_buf *);
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static void eth_0_config_func(void);
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static enet_rx_bd_struct_t __aligned(ENET_BUFF_ALIGNMENT)
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rx_buffer_desc[CONFIG_ETH_KSDK_TX_BUFFERS];
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static enet_tx_bd_struct_t __aligned(ENET_BUFF_ALIGNMENT)
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tx_buffer_desc[CONFIG_ETH_KSDK_TX_BUFFERS];
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/* Use ENET_FRAME_MAX_VALNFRAMELEN for VLAN frame size
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* Use ENET_FRAME_MAX_FRAMELEN for ethernet frame size
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*/
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#define ETH_KSDK_BUFFER_SIZE \
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ROUND_UP(ENET_FRAME_MAX_VALNFRAMELEN, ENET_BUFF_ALIGNMENT)
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static uint8_t __aligned(ENET_BUFF_ALIGNMENT)
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rx_buffer[CONFIG_ETH_KSDK_RX_BUFFERS][ETH_KSDK_BUFFER_SIZE];
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static uint8_t __aligned(ENET_BUFF_ALIGNMENT)
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tx_buffer[CONFIG_ETH_KSDK_TX_BUFFERS][ETH_KSDK_BUFFER_SIZE];
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static int eth_tx(struct device *iface, struct net_buf *buf)
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{
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struct eth_context *context = iface->driver_data;
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status_t status;
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nano_sem_take(&context->tx_buf_sem, TICKS_UNLIMITED);
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status = ENET_SendFrame(ENET, &context->enet_handle, uip_buf(buf),
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uip_len(buf));
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if (status) {
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SYS_LOG_ERR("ENET_SendFrame error: %d\n", status);
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return 0;
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}
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return 1;
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}
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static void eth_rx(struct device *iface)
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{
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struct eth_context *context = iface->driver_data;
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struct net_buf *buf;
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uint32_t frame_length = 0;
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status_t status;
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status = ENET_GetRxFrameSize(&context->enet_handle, &frame_length);
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if (status) {
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enet_data_error_stats_t error_stats;
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SYS_LOG_ERR("ENET_GetRxFrameSize return: %d", status);
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ENET_GetRxErrBeforeReadFrame(&context->enet_handle,
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&error_stats);
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/* Flush the current read buffer. This operation can
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* only report failure if there is no frame to flush,
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* which cannot happen in this context.
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*/
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status = ENET_ReadFrame(ENET, &context->enet_handle, NULL, 0);
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assert(status == kStatus_Success);
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return;
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}
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buf = ip_buf_get_reserve_rx(0);
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if (buf == NULL) {
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/* We failed to get a receive buffer. We don't add
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* any further logging here because the allocator
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* issued a diagnostic when it failed to allocate.
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*
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* Flush the current read buffer. This operation can
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* only report failure if there is no frame to flush,
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* which cannot happen in this context.
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*/
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status = ENET_ReadFrame(ENET, &context->enet_handle, NULL, 0);
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assert(status == kStatus_Success);
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return;
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}
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if (net_buf_tailroom(buf) < frame_length) {
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SYS_LOG_ERR("frame too large\n");
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net_buf_unref(buf);
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status = ENET_ReadFrame(ENET, &context->enet_handle, NULL, 0);
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assert(status == kStatus_Success);
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return;
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}
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status = ENET_ReadFrame(ENET, &context->enet_handle,
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net_buf_add(buf, frame_length), frame_length);
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if (status) {
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SYS_LOG_ERR("ENET_ReadFrame failed: %d\n", status);
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net_buf_unref(buf);
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return;
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}
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uip_len(buf) = frame_length;
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net_driver_ethernet_recv(buf);
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}
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static void eth_callback(ENET_Type *base, enet_handle_t *handle,
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enet_event_t event, void *param)
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{
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struct device *iface = param;
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struct eth_context *context = iface->driver_data;
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switch (event) {
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case kENET_RxEvent:
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eth_rx(iface);
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break;
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case kENET_TxEvent:
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/* Free the TX buffer. */
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nano_sem_give(&context->tx_buf_sem);
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break;
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case kENET_ErrEvent:
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/* Error event: BABR/BABT/EBERR/LC/RL/UN/PLR. */
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break;
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case kENET_WakeUpEvent:
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/* Wake up from sleep mode event. */
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break;
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#ifdef ENET_ENHANCEDBUFFERDESCRIPTOR_MODE
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case kENET_TimeStampEvent:
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/* Time stamp event. */
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break;
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case kENET_TimeStampAvailEvent:
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/* Time stamp available event. */
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break;
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#endif
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}
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}
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#if defined(CONFIG_ETH_KSDK_0_RANDOM_MAC)
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static void generate_mac(uint8_t *mac_addr)
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{
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uint32_t entropy;
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entropy = sys_rand32_get();
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/* Locally administered, unicast */
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mac_addr[0] = ((entropy >> 0) & 0xfc) | 0x02;
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mac_addr[1] = entropy >> 8;
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mac_addr[2] = entropy >> 16;
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mac_addr[3] = entropy >> 24;
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entropy = sys_rand32_get();
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mac_addr[4] = entropy >> 0;
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mac_addr[5] = entropy >> 8;
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}
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#endif
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static int eth_0_init(struct device *dev)
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{
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struct eth_context *context = dev->driver_data;
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enet_config_t enet_config;
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uint32_t sys_clock;
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const uint32_t phy_addr = 0x0;
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bool link;
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status_t status;
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int result;
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enet_buffer_config_t buffer_config = {
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.rxBdNumber = CONFIG_ETH_KSDK_RX_BUFFERS,
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.txBdNumber = CONFIG_ETH_KSDK_TX_BUFFERS,
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.rxBuffSizeAlign = ETH_KSDK_BUFFER_SIZE,
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.txBuffSizeAlign = ETH_KSDK_BUFFER_SIZE,
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.rxBdStartAddrAlign = rx_buffer_desc,
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.txBdStartAddrAlign = tx_buffer_desc,
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.rxBufferAlign = rx_buffer[0],
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.txBufferAlign = tx_buffer[0],
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};
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nano_sem_init(&context->tx_buf_sem);
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for (int i = 0; i < CONFIG_ETH_KSDK_TX_BUFFERS; i++) {
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nano_sem_give(&context->tx_buf_sem);
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}
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sys_clock = CLOCK_GetFreq(kCLOCK_CoreSysClk);
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ENET_GetDefaultConfig(&enet_config);
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enet_config.interrupt |= kENET_RxFrameInterrupt;
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enet_config.interrupt |= kENET_TxFrameInterrupt;
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status = PHY_Init(ENET, phy_addr, sys_clock);
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if (status) {
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SYS_LOG_ERR("PHY_Init() failed: %d", status);
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return 1;
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}
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PHY_GetLinkStatus(ENET, phy_addr, &link);
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if (link) {
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phy_speed_t phy_speed;
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phy_duplex_t phy_duplex;
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PHY_GetLinkSpeedDuplex(ENET, phy_addr, &phy_speed, &phy_duplex);
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enet_config.miiSpeed = (enet_mii_speed_t) phy_speed;
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enet_config.miiDuplex = (enet_mii_duplex_t) phy_duplex;
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SYS_LOG_INF("Enabled %dM %s-duplex mode.",
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(phy_speed ? 100 : 10),
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(phy_duplex ? "full" : "half"));
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} else {
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SYS_LOG_INF("Link down.");
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}
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#if defined(CONFIG_ETH_KSDK_0_RANDOM_MAC)
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generate_mac(context->mac_addr);
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#endif
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ENET_Init(ENET,
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&context->enet_handle,
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&enet_config,
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&buffer_config,
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context->mac_addr,
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sys_clock);
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SYS_LOG_DBG("MAC %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x",
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context->mac_addr[0], context->mac_addr[1],
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context->mac_addr[2], context->mac_addr[3],
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context->mac_addr[4], context->mac_addr[5]);
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result = net_set_mac(context->mac_addr, sizeof(context->mac_addr));
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if (result) {
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return 1;
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}
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ENET_SetCallback(&context->enet_handle, eth_callback, dev);
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net_driver_ethernet_register_tx(eth_net_tx);
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eth_0_config_func();
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ENET_ActiveRead(ENET);
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return 0;
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}
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static void eth_ksdk_rx_isr(void *p)
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{
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struct device *dev = p;
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struct eth_context *context = dev->driver_data;
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ENET_ReceiveIRQHandler(ENET, &context->enet_handle);
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}
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static void eth_ksdk_tx_isr(void *p)
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{
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struct device *dev = p;
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struct eth_context *context = dev->driver_data;
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ENET_TransmitIRQHandler(ENET, &context->enet_handle);
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}
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static void eth_ksdk_error_isr(void *p)
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{
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struct device *dev = p;
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struct eth_context *context = dev->driver_data;
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ENET_ErrorIRQHandler(ENET, &context->enet_handle);
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}
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static struct eth_context eth_0_context = {
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#if !defined(CONFIG_ETH_KSDK_0_RANDOM_MAC)
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.mac_addr = {
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CONFIG_ETH_KSDK_0_MAC0,
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CONFIG_ETH_KSDK_0_MAC1,
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CONFIG_ETH_KSDK_0_MAC2,
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CONFIG_ETH_KSDK_0_MAC3,
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CONFIG_ETH_KSDK_0_MAC4,
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CONFIG_ETH_KSDK_0_MAC5
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}
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#endif
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};
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DEVICE_INIT(eth_ksdk_0, CONFIG_ETH_KSDK_0_NAME, eth_0_init,
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ð_0_context, NULL,
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NANOKERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
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static int eth_net_tx(struct net_buf *buf)
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{
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return eth_tx(DEVICE_GET(eth_ksdk_0), buf);
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}
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static void eth_0_config_func(void)
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{
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IRQ_CONNECT(IRQ_ETH_RX, CONFIG_ETH_KSDK_0_IRQ_PRI,
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eth_ksdk_rx_isr, DEVICE_GET(eth_ksdk_0), 0);
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irq_enable(IRQ_ETH_RX);
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IRQ_CONNECT(IRQ_ETH_TX, CONFIG_ETH_KSDK_0_IRQ_PRI,
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eth_ksdk_tx_isr, DEVICE_GET(eth_ksdk_0), 0);
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irq_enable(IRQ_ETH_TX);
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IRQ_CONNECT(IRQ_ETH_ERR_MISC, CONFIG_ETH_KSDK_0_IRQ_PRI,
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eth_ksdk_error_isr, DEVICE_GET(eth_ksdk_0), 0);
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irq_enable(IRQ_ETH_ERR_MISC);
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}
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