tests: add init_shutdown test for realtek_mst_i2c_spi

This can catch regressions like the earlier one in this programmer that
caused initialization to always fail. Requires support for mocking POSIX
file I/O functions because the programmer does ioctls on the opened
file.

TEST=ninja test

Signed-off-by: Peter Marheine <pmarheine@chromium.org>
Change-Id: I5a5c617d1ec35d2a3bbe622e5add82a65eb396f0
Reviewed-on: https://review.coreboot.org/c/flashrom/+/56911
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/tests/io_mock.h b/tests/io_mock.h
index 5cddca0df..c69cd38db 100644
--- a/tests/io_mock.h
+++ b/tests/io_mock.h
@@ -42,6 +42,14 @@ struct pci_dev {
 	unsigned int device_id;
 };
 
+/* POSIX open() flags, avoiding dependency on fcntl.h */
+#define O_RDONLY 0
+#define O_WRONLY 1
+#define O_RDWR 2
+
+/* Linux I2C interface constants, avoiding linux/i2c-dev.h */
+#define I2C_SLAVE 0x0703
+
 struct io_mock {
 	void *state;
 
@@ -65,6 +73,12 @@ struct io_mock {
 					unsigned char *data,
 					uint16_t wLength,
 					unsigned int timeout);
+
+	/* POSIX File I/O */
+	int (*open)(void *state, const char *pathname, int flags);
+	int (*ioctl)(void *state, int fd, unsigned long request, va_list args);
+	int (*read)(void *state, int fd, void *buf, size_t sz);
+	int (*write)(void *state, int fd, const void *buf, size_t sz);
 };
 
 void io_mock_register(const struct io_mock *io);