mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-08-27 12:15:21 +00:00
2975ca0754
The API name space for Bluetooth is bt_* and BT_* so it makes sense to align the Kconfig name space with this. The additional benefit is that this also makes the names shorter. It is also in line with what Linux uses for Bluetooth Kconfig entries. Some Bluetooth-related Networking Kconfig defines are renamed as well in order to be consistent, such as NET_L2_BLUETOOTH. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/* nrf51-pm.c Power Management for nrf51 chip */
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr.h>
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#include <gpio.h>
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#include <uart.h>
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#include <errno.h>
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#define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_DRIVER)
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#include "common/log.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_BTWAKE_PIN 5
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static struct device *nrf51_gpio;
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int nrf51_wakeup(void)
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{
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return gpio_pin_write(nrf51_gpio, NBLE_BTWAKE_PIN, 1);
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}
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int nrf51_allow_sleep(void)
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{
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return gpio_pin_write(nrf51_gpio, NBLE_BTWAKE_PIN, 0);
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}
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int nrf51_init(struct device *dev)
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{
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u8_t c;
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int ret;
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nrf51_gpio = device_get_binding("GPIO_0");
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if (!nrf51_gpio) {
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BT_ERR("Cannot find GPIO_0");
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return -ENODEV;
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}
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ret = gpio_pin_configure(nrf51_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(nrf51_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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/* Drain the fifo */
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while (uart_fifo_read(dev, &c, 1)) {
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continue;
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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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k_sleep(1);
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ret = gpio_pin_write(nrf51_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(nrf51_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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ret = gpio_pin_configure(nrf51_gpio, NBLE_BTWAKE_PIN, GPIO_DIR_OUT);
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if (ret) {
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BT_ERR("Error configuring pin %d", NBLE_BTWAKE_PIN);
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return -ENODEV;
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}
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return nrf51_wakeup();
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}
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