[PATCH linux dev-4.7 v2 7/7] tools/testing/selftests: Add fsi command line tool

[Christopher Bostic <cbostic@linux.vnet.ibm.com>]

Add command line tool to read/write CFAMs via the slave 'raw'
sysfs file.

Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com>
---
 tools/testing/selftests/fsi/fsitest.c | 163 ++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 tools/testing/selftests/fsi/fsitest.c

diff --git a/tools/testing/selftests/fsi/fsitest.c b/tools/testing/selftests/fsi/fsitest.c
new file mode 100644
index 0000000..7aa3e7f
--- /dev/null
+++ b/tools/testing/selftests/fsi/fsitest.c
@@ -0,0 +1,163 @@
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <err.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <getopt.h>
+#include <string.h>
+
+int testread(int fd, uint32_t addr, uint32_t *value)
+{
+	int rc;
+
+	lseek(fd, addr, SEEK_SET);
+	rc = read(fd, value, 4);
+	if (rc >= 0)
+		rc = 0;
+
+	return rc;
+}
+
+int testwrite(int fd, uint32_t addr, uint32_t value)
+{
+	int rc;
+
+	lseek(fd, addr, SEEK_SET);
+	rc = write(fd, &value, 4);
+	if (rc >= 0)
+		rc = 0;
+
+	return rc;
+}
+
+#define NUM_WRITES	6
+#define NUM_READS	9
+#define NUM_HUB_READS	9
+
+int main(int argc, char **argv)
+{
+	int rc = 0;
+	int i, fd, option;
+	int skip_write = 0;
+	int verbose = 0;
+	int hub = 0;
+	char path[64] = "/sys/bus/platform/devices/fsi-master/slave@00:00/raw";
+	uint32_t value;
+	const uint32_t write_addresses[NUM_WRITES] = {
+		0x800,
+		0x818,
+		0x35D0,
+		0x100800,
+		0x100818,
+		0x1035D0,
+	};
+	const uint32_t addresses[NUM_READS] = {
+		0x800,	/* smode */
+		0x818,	/* si1m */
+		0x81C,	/* si1s */
+		0x101C,	/* scom status */
+		0x1028,	/* scom chipid */
+		0x1808,	/* i2c mode */
+		0x181C,	/* i2c status */
+		0x3400,	/* hub mmode */
+		0x35D0,	/* hub status */
+	};
+	const uint32_t hub_addresses[NUM_HUB_READS] = {
+		0x100800,	/* smode */
+		0x100818,	/* si1m */
+		0x10081C,	/* si1s */
+		0x10101C,	/* scom status */
+		0x101028,	/* scom chipid */
+		0x101808,	/* i2c mode */
+		0x10181C,	/* i2c status */
+		0x103400,	/* hub mmode */
+		0x1035D0,	/* hub status */
+	};
+
+	while ((option = getopt(argc, argv, "vsb:x")) != -1) {
+		switch (option) {
+		case 'v':
+			verbose = 1;
+			break;
+		case 's':
+			skip_write = 1;
+			break;
+		case 'b':
+			strncpy(path, optarg, 64);
+			break;
+		case 'x':
+			hub = 1;
+			break;
+		default:
+			printf("unknown option\n");
+		}
+	}
+
+	fd = open(path, O_RDWR);
+	if (fd < 0) {
+		printf("FAILED - failed to open %s\n", path);
+		return -ENODEV;
+	}
+
+	for (i = 0; i < NUM_READS; ++i) {
+		rc = testread(fd, addresses[i], &value);
+		if (rc) {
+			printf("FAILED - failed to read %08x\n", addresses[i]);
+			goto exit;
+		}
+
+		if (verbose)
+			printf("read %08x: %08x\n", addresses[i], value);
+	}
+
+	if (!skip_write) {
+		for (i = 0; i < NUM_WRITES; ++i) {
+			value = 0;
+			rc = testread(fd, write_addresses[i], &value);
+			if (rc) {
+				printf("FAILED - failed to read %08x\n",
+				       write_addresses[i]);
+				goto exit;
+			}
+
+			rc = testwrite(fd, write_addresses[i], value);
+			if (rc) {
+				printf("FAILED - failed to write %08x\n",
+				       write_addresses[i]);
+				goto exit;
+			}
+
+			if (verbose)
+				printf("wrote %08x: %08x\n",
+				       write_addresses[i], value);
+		}
+	} else if (verbose)
+		printf("skipping write\n");
+
+	if (hub) {
+		for (i = 0; i < NUM_HUB_READS; ++i) {
+			rc = testread(fd, hub_addresses[i], &value);
+			if (rc) {
+				printf("FAILED - failed to read hub %08x\n",
+				       hub_addresses[i]);
+				goto exit;
+			}
+
+			if (verbose)
+				printf("read %08x: %08x\n", hub_addresses[i],
+				       value);
+		}
+	}
+
+	printf("SUCCESS\n");
+
+exit:
+	close(fd);
+
+	return rc;
+}
-- 
1.8.2.2