f5554ca762
Add bus emulator support for MSPI and the MSPI controller emulator. The mspi_emul.c not only serves as an emulator but also provides an example implementation of the MSPI API. It does not actually do anything other than validating parameters and forwarding transceive request back to the device driver emulators. Signed-off-by: Swift Tian <swift.tian@ambiq.com>
105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/*
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* Copyright 2020 Google LLC
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* Copyright (c) 2020 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define LOG_LEVEL CONFIG_EMUL_LOG_LEVEL
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(emul);
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#include <zephyr/device.h>
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#include <zephyr/drivers/emul.h>
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#include <zephyr/sys/iterable_sections.h>
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#include <string.h>
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const struct emul *emul_get_binding(const char *name)
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{
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STRUCT_SECTION_FOREACH(emul, emul_it) {
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if (strcmp(emul_it->dev->name, name) == 0) {
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return emul_it;
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}
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}
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return NULL;
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}
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int emul_init_for_bus(const struct device *dev)
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{
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const struct emul_list_for_bus *cfg = dev->config;
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/*
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* Walk the list of children, find the corresponding emulator and
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* initialise it.
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*/
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const struct emul_link_for_bus *elp;
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const struct emul_link_for_bus *const end = cfg->children + cfg->num_children;
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LOG_INF("Registering %d emulator(s) for %s", cfg->num_children, dev->name);
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for (elp = cfg->children; elp < end; elp++) {
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const struct emul *emul = emul_get_binding(elp->dev->name);
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if (!emul) {
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LOG_WRN("Cannot find emulator for '%s'", elp->dev->name);
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continue;
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}
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switch (emul->bus_type) {
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case EMUL_BUS_TYPE_I2C:
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emul->bus.i2c->target = emul;
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break;
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case EMUL_BUS_TYPE_ESPI:
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emul->bus.espi->target = emul;
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break;
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case EMUL_BUS_TYPE_SPI:
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emul->bus.spi->target = emul;
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break;
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case EMUL_BUS_TYPE_MSPI:
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emul->bus.mspi->target = emul;
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break;
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case EMUL_BUS_TYPE_NONE:
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break;
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}
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int rc = emul->init(emul, dev);
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if (rc != 0) {
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LOG_WRN("Init %s emulator failed: %d",
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elp->dev->name, rc);
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}
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switch (emul->bus_type) {
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#ifdef CONFIG_I2C_EMUL
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case EMUL_BUS_TYPE_I2C:
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rc = i2c_emul_register(dev, emul->bus.i2c);
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break;
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#endif /* CONFIG_I2C_EMUL */
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#ifdef CONFIG_ESPI_EMUL
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case EMUL_BUS_TYPE_ESPI:
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rc = espi_emul_register(dev, emul->bus.espi);
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break;
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#endif /* CONFIG_ESPI_EMUL */
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#ifdef CONFIG_SPI_EMUL
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case EMUL_BUS_TYPE_SPI:
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rc = spi_emul_register(dev, emul->bus.spi);
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break;
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#endif /* CONFIG_SPI_EMUL */
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#ifdef CONFIG_MSPI_EMUL
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case EMUL_BUS_TYPE_MSPI:
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rc = mspi_emul_register(dev, emul->bus.mspi);
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break;
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#endif /* CONFIG_MSPI_EMUL */
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default:
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rc = -EINVAL;
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LOG_WRN("Found no emulated bus enabled to register emulator %s",
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elp->dev->name);
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}
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if (rc != 0) {
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LOG_WRN("Failed to register emulator for %s: %d", elp->dev->name, rc);
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}
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}
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return 0;
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}
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