1 files changed, 72 insertions, 0 deletions
diff --git a/tests/linux_spi.c b/tests/linux_spi.c
new file mode 100644
index 000000000..1b653fefd
--- /dev/null
+++ b/tests/linux_spi.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the flashrom project.
+ *
+ * Copyright 2021 Google LLC
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "lifecycle.h"
+
+#if CONFIG_LINUX_SPI == 1
+static int linux_spi_ioctl(void *state, int fd, unsigned long request, va_list args) {
+
+	if (request == SPI_IOC_MESSAGE(2)) { /* ioctl code for read request */
+		struct spi_ioc_transfer* msg = va_arg(args, struct spi_ioc_transfer*);
+
+		/* First message has write array and write count */
+		unsigned int writecnt = msg[0].len;
+		unsigned char *writearr = (unsigned char *)(uintptr_t)msg[0].tx_buf;
+		/* Second message has read array and read count */
+		unsigned int readcnt = msg[1].len;
+
+		/* Detect probing */
+		if (writecnt == 1 && writearr[0] == JEDEC_RDID && readcnt == 3) {
+			/* We need to populate read array. */
+			unsigned char *readarr = (unsigned char *)(uintptr_t)msg[1].rx_buf;
+			readarr[0] = 0xEF; /* WINBOND_NEX_ID */
+			readarr[1] = 0x40; /* WINBOND_NEX_W25Q128_V left byte */
+			readarr[2] = 0x18; /* WINBOND_NEX_W25Q128_V right byte */
+		}
+	}
+
+	return 0;
+}
+
+static char *linux_spi_fgets(void *state, char *buf, int len, FILE *fp)
+{
+	/* Emulate reading max buffer size from sysfs. */
+	const char *max_buf_size = "1048576";
+
+	return memcpy(buf, max_buf_size, min(len, strlen(max_buf_size) + 1));
+}
+
+void linux_spi_probe_lifecycle_test_success(void **state)
+{
+	/*
+	 * Current implementation tests a particular path of the init procedure.
+	 * Specifically, it is reading the buffer size from sysfs.
+	 */
+	struct io_mock_fallback_open_state linux_spi_fallback_open_state = {
+		.noc = 0,
+		.paths = { "/dev/null", NULL },
+		.flags = { O_RDWR },
+	};
+	const struct io_mock linux_spi_io = {
+		.iom_fgets	= linux_spi_fgets,
+		.iom_ioctl	= linux_spi_ioctl,
+		.fallback_open_state = &linux_spi_fallback_open_state,
+	};
+
+	run_probe_lifecycle(state, &linux_spi_io, &programmer_linux_spi, "dev=/dev/null", "W25Q128.V");
+}
+#else
+	SKIP_TEST(linux_spi_probe_lifecycle_test_success)
+#endif /* CONFIG_LINUX_SPI */