Add a simple SPI peripheral that echoes back received data. Useful for testing SPI controllers.
Signed-off-by: Octavian Purdila <ta...@google.com> --- tests/unit/spi_tester.c | 60 +++++++++++++++++++++++++++++++++++++++++ tests/unit/spi_tester.h | 32 ++++++++++++++++++++++ 2 files changed, 92 insertions(+) create mode 100644 tests/unit/spi_tester.c create mode 100644 tests/unit/spi_tester.h diff --git a/tests/unit/spi_tester.c b/tests/unit/spi_tester.c new file mode 100644 index 0000000000..7bccc680cc --- /dev/null +++ b/tests/unit/spi_tester.c @@ -0,0 +1,60 @@ +/* + * Simple SPI peripheral echo device used for SPI controller testing. + * + * Copyright (c) 2024 Google LLC. + * + * SPDX-License-Identifier: GPL-2.0-or-later + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "spi_tester.h" + +static uint32_t spi_tester_transfer(SSIPeripheral *dev, uint32_t value) +{ + SpiTesterState *s = SPI_TESTER(dev); + + if (s->cs) { + return 0; + } + + return value; +} + +static void spi_tester_realize(SSIPeripheral *d, Error **errp) +{ +} + +static int spi_tester_set_cs(SSIPeripheral *dev, bool select) +{ + SpiTesterState *s = SPI_TESTER(dev); + + s->cs = select; + + return 0; +} + +static void spi_tester_class_init(ObjectClass *klass, void *data) +{ + SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass); + + k->realize = spi_tester_realize; + k->transfer = spi_tester_transfer; + k->set_cs = spi_tester_set_cs; + k->cs_polarity = SSI_CS_LOW; +} + +static const TypeInfo spi_tester_info = { + .name = TYPE_SPI_TESTER, + .parent = TYPE_SSI_PERIPHERAL, + .instance_size = sizeof(SpiTesterState), + .class_init = spi_tester_class_init, +}; + +static void spi_tester_register_types(void) +{ + type_register_static(&spi_tester_info); +} + +type_init(spi_tester_register_types) diff --git a/tests/unit/spi_tester.h b/tests/unit/spi_tester.h new file mode 100644 index 0000000000..16e08d2b5c --- /dev/null +++ b/tests/unit/spi_tester.h @@ -0,0 +1,32 @@ +/* + * Simple SPI peripheral device used for SPI controller testing. + * + * Copyright (c) 2024 Google LLC. + * + * SPDX-License-Identifier: GPL-2.0-or-later + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef TESTS_UNIT_SPI_TESTER_H +#define TESTS_UNIT_SPI_TESTER_H + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qemu/module.h" +#include "qemu/bswap.h" +#include "hw/irq.h" +#include "hw/ssi/ssi.h" +#include "qemu/timer.h" +#include "hw/qdev-properties.h" + +#define TYPE_SPI_TESTER "spi-tester" +#define SPI_TESTER(obj) OBJECT_CHECK(SpiTesterState, (obj), TYPE_SPI_TESTER) + +typedef struct { + SSIPeripheral ssidev; + bool cs; +} SpiTesterState; + +#endif /* TESTS_UNIT_SPI_TESTER_H */ -- 2.46.0.rc2.264.g509ed76dc8-goog