158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation
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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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#include <errno.h>
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#include <nanokernel.h>
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#include <device.h>
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#include <gpio.h>
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/conn.h>
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#include <bluetooth/log.h>
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#include "uart.h"
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#define NBLE_SWDIO_PIN 6
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#define NBLE_RESET_PIN NBLE_SWDIO_PIN
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#define NBLE_CHANNEL 0
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static void *channel;
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/**
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* Function handling the events from the UART IPC (irq).
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*
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* @param channel Channel on which the event applies
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* @param request IPC_MSG_TYPE_MESSAGE when a new message was received,
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* IPC_MSG_TYPE_FREE when the previous message was sent and can be freed.
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* @param len Length of the data
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* @param p_data Pointer to the data
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* @return 0
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*/
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static int recv_cb(int channel, int request, int len, void *p_data)
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{
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BT_DBG("channel %d request %d len %d", channel, request, len);
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switch (request) {
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case IPC_MSG_TYPE_MESSAGE:
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break;
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case IPC_MSG_TYPE_FREE:
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/* TODO: Try to send another message immediately */
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break;
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default:
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/* Free the message */
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BT_ERR("Unsupported RPC request");
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break;
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}
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return 0;
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}
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int bt_enable(bt_ready_cb_t cb)
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{
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struct device *gpio;
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int ret;
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BT_DBG("");
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gpio = device_get_binding(CONFIG_GPIO_DW_0_NAME);
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if (!gpio) {
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BT_ERR("Cannot find %", CONFIG_GPIO_DW_0_NAME);
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return -ENODEV;
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}
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ret = gpio_pin_configure(gpio, NBLE_RESET_PIN, GPIO_DIR_OUT);
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if (ret) {
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BT_ERR("Error configuring pin %d", NBLE_RESET_PIN);
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return -ENODEV;
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}
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/* Reset hold time is 0.2us (normal) or 100us (SWD debug) */
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ret = gpio_pin_write(gpio, NBLE_RESET_PIN, 0);
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if (ret) {
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BT_ERR("Error pin write %d", NBLE_RESET_PIN);
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return -EINVAL;
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}
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/**
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* NBLE reset is achieved by asserting low the SWDIO pin.
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* However, the BLE Core chip can be in SWD debug mode,
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* and NRF_POWER->RESET = 0 due to, other constraints: therefore,
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* this reset might not work everytime, especially after
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* flashing or debugging.
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*/
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/* sleep 1ms depending on context */
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switch (sys_execution_context_type_get()) {
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case NANO_CTX_FIBER:
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fiber_sleep(MSEC(1));
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break;
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case NANO_CTX_TASK:
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task_sleep(MSEC(1));
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break;
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default:
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BT_ERR("ISR context is not supported");
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return -EINVAL;
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}
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/* Open the UART channel for RPC while Nordic is in reset */
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channel = ipc_uart_channel_open(NBLE_CHANNEL, recv_cb);
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BT_DBG("channel %p", channel);
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ret = nble_open();
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if (ret) {
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return ret;
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}
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ret = gpio_pin_write(gpio, NBLE_RESET_PIN, 1);
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if (ret) {
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BT_ERR("Error pin write %d", NBLE_RESET_PIN);
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return -EINVAL;
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}
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/* Set back GPIO to input to avoid interfering with external debugger */
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ret = gpio_pin_configure(gpio, NBLE_RESET_PIN, GPIO_DIR_IN);
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if (ret) {
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BT_ERR("Error configuring pin %d", NBLE_RESET_PIN);
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return -ENODEV;
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}
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return 0;
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}
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int bt_le_adv_start(const struct bt_le_adv_param *param,
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const struct bt_data *ad, size_t ad_len,
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const struct bt_data *sd, size_t sd_len)
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{
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return -ENOSYS;
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}
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int bt_le_adv_stop(void)
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{
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return -ENOSYS;
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}
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int bt_le_scan_start(const struct bt_le_scan_param *param, bt_le_scan_cb_t cb)
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{
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return -ENOSYS;
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}
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int bt_le_scan_stop(void)
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{
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return -ENOSYS;
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}
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