81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
/*
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* Logging of I2C messages
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*
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* Copyright 2020 Google LLC
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdio.h>
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#include <zephyr/drivers/i2c.h>
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#define LOG_LEVEL CONFIG_I2C_LOG_LEVEL
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(i2c);
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#if defined(CONFIG_I2C_CALLBACK) && defined(CONFIG_POLL)
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void z_i2c_transfer_signal_cb(const struct device *dev,
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int result,
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void *data)
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{
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struct k_poll_signal *sig = (struct k_poll_signal *)data;
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k_poll_signal_raise(sig, result);
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}
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#endif
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#ifdef CONFIG_I2C_DUMP_MESSAGES_ALLOWLIST
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#define DEF_BUS_WITH_ADDR(node, prop, idx) I2C_DT_SPEC_GET(DT_PHANDLE_BY_IDX(node, prop, idx)),
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#define DEF_ALLOWLIST_DEV(node) DT_FOREACH_PROP_ELEM(node, devices, DEF_BUS_WITH_ADDR)
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struct i2c_dt_spec messages_allowlist[] = {
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DT_FOREACH_STATUS_OKAY(zephyr_i2c_dump_allowlist, DEF_ALLOWLIST_DEV)};
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#undef DEF_ALLOWLIST_DEV
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#undef DEF_BUS_WITH_ADDR
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#endif
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void i2c_dump_msgs_rw(const struct device *dev, const struct i2c_msg *msgs, uint8_t num_msgs,
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uint16_t addr, bool dump_read)
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{
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#ifdef CONFIG_I2C_DUMP_MESSAGES_ALLOWLIST
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bool found_dev = 0;
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for (int a = 0; a < ARRAY_SIZE(messages_allowlist); a++) {
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struct i2c_dt_spec *allowed = &messages_allowlist[a];
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if (dev != allowed->bus || addr != allowed->addr) {
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continue;
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} else {
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found_dev = 1;
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break;
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}
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}
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if (!found_dev) {
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return;
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}
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#endif
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LOG_DBG("I2C msg: %s, addr=%x", dev->name, addr);
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for (unsigned int i = 0; i < num_msgs; i++) {
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const struct i2c_msg *msg = &msgs[i];
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const bool is_read = msg->flags & I2C_MSG_READ;
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const bool dump_data = dump_read || !is_read;
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if (msg->len == 1 && dump_data) {
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LOG_DBG(" %c %2s %1s len=01: %02x", is_read ? 'R' : 'W',
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msg->flags & I2C_MSG_RESTART ? "Sr" : "",
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msg->flags & I2C_MSG_STOP ? "P" : "", msg->buf[0]);
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} else {
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LOG_DBG(" %c %2s %1s len=%02x: ", is_read ? 'R' : 'W',
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msg->flags & I2C_MSG_RESTART ? "Sr" : "",
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msg->flags & I2C_MSG_STOP ? "P" : "", msg->len);
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if (dump_data) {
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LOG_HEXDUMP_DBG(msg->buf, msg->len, "contents:");
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}
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}
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}
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}
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