[U-Boot] [PATCH v2 2/2] fdt: Add tests for fdtdec
Simon Glass
sjg at chromium.org
Thu Jan 12 00:08:04 CET 2012
The fdtdec_find_aliases_for_id() function is complicated enough that
it really should have some tests. This does not necessarily need to be
committed to U-Boot, but it might be useful.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
Changes in v2:
- Add test_fdtdec command to test fdtdec_find_aliases_for_id()
lib/Makefile | 1 +
lib/fdtdec-test.c | 228 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 229 insertions(+), 0 deletions(-)
create mode 100644 lib/fdtdec-test.c
diff --git a/lib/Makefile b/lib/Makefile
index 35ba7ff..421b7ac 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -39,6 +39,7 @@ COBJS-y += crc32.o
COBJS-y += display_options.o
COBJS-y += errno.o
COBJS-$(CONFIG_OF_CONTROL) += fdtdec.o
+COBJS-$(CONFIG_TEST_FDTDEC) += fdtdec-test.o
COBJS-$(CONFIG_GZIP) += gunzip.o
COBJS-y += hashtable.o
COBJS-$(CONFIG_LMB) += lmb.o
diff --git a/lib/fdtdec-test.c b/lib/fdtdec-test.c
new file mode 100644
index 0000000..68c2e3a
--- /dev/null
+++ b/lib/fdtdec-test.c
@@ -0,0 +1,228 @@
+/*
+ * Some very basic tests for fdtdec, accessed through test_fdtdec command.
+ * They are easiest to use with sandbox.
+ *
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <os.h>
+
+/* The size of our test fdt blob */
+#define FDT_SIZE (16 * 1024)
+
+/**
+ * Check if an operation failed, and if so, print an error
+ *
+ * @param oper_name Name of operation
+ * @param err Error code to check
+ *
+ * @return 0 if ok, -1 if there was an error
+ */
+static int fdt_checkerr(const char *oper_name, int err)
+{
+ if (err) {
+ printf("%s: %s: %s\n", __func__, oper_name, fdt_strerror(err));
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * Check the result of an operation and if incorrect, print an error
+ *
+ * @param oper_name Name of operation
+ * @param expected Expected value
+ * @param value Actual value
+ *
+ * @return 0 if ok, -1 if there was an error
+ */
+static int checkval(const char *oper_name, int expected, int value)
+{
+ if (expected != value) {
+ printf("%s: %s: expected %d, but returned %d\n", __func__,
+ oper_name, expected, value);
+ return -1;
+ }
+
+ return 0;
+}
+
+#define CHECK(op) if (fdt_checkerr(#op, op)) return -1
+#define CHECKVAL(op, expected) \
+ if (checkval(#op, expected, op)) \
+ return -1
+#define CHECKOK(op) CHECKVAL(op, 0)
+
+/* maximum number of nodes / aliases to generate */
+#define MAX_NODES 20
+
+/*
+ * Make a test fdt
+ *
+ * @param fdt Device tree pointer
+ * @param size Size of device tree blob
+ * @param aliases Specifies alias assignments. Format is a list of items
+ * separated by space. Items are #a where
+ * # is the alias number
+ * a is the node to point to
+ * @param nodes Specifies nodes to generate (a=0, b=1), upper case
+ * means to create a disabled node
+ */
+static int make_fdt(void *fdt, int size, const char *aliases,
+ const char *nodes)
+{
+ char name[20], value[20];
+ const char *s;
+ int fd;
+
+ CHECK(fdt_create(fdt, size));
+ CHECK(fdt_finish_reservemap(fdt));
+ CHECK(fdt_begin_node(fdt, ""));
+
+ CHECK(fdt_begin_node(fdt, "aliases"));
+ for (s = aliases; *s;) {
+ sprintf(name, "i2c%c", *s);
+ sprintf(value, "/i2c%d at 0", s[1] - 'a');
+ CHECK(fdt_property_string(fdt, name, value));
+ s += 2 + (s[2] != '\0');
+ }
+ CHECK(fdt_end_node(fdt));
+
+ for (s = nodes; *s; s++) {
+ sprintf(value, "i2c%d at 0", (*s & 0xdf) - 'A');
+ CHECK(fdt_begin_node(fdt, value));
+ CHECK(fdt_property_string(fdt, "compatible",
+ fdtdec_get_compatible(COMPAT_NVIDIA_TEGRA20_I2C)));
+ if (*s <= 'Z')
+ CHECK(fdt_property_string(fdt, "status", "disabled"));
+ CHECK(fdt_end_node(fdt));
+ }
+
+ CHECK(fdt_end_node(fdt));
+ CHECK(fdt_finish(fdt));
+ CHECK(fdt_pack(fdt));
+#if defined(DEBUG) && defined(CONFIG_SANDBOX)
+ fd = os_open("/tmp/fdtdec-text.dtb", OS_O_CREAT | OS_O_WRONLY);
+ if (fd == -1) {
+ printf("Could not open .dtb file to write\n");
+ return -1;
+ }
+ os_write(fd, fdt, size);
+ os_close(fd);
+#endif
+ return 0;
+}
+
+static int run_test(const char *aliases, const char *nodes, const char *expect)
+{
+ int list[MAX_NODES];
+ const char *s;
+ va_list ptr;
+ void *blob;
+ int i;
+
+ blob = malloc(FDT_SIZE);
+ if (!blob) {
+ printf("%s: out of memory\n", __func__);
+ return 1;
+ }
+
+ printf("aliases=%s, nodes=%s, expect=%s: ", aliases, nodes, expect);
+ CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0);
+ CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c",
+ COMPAT_NVIDIA_TEGRA20_I2C,
+ list, ARRAY_SIZE(list)), strlen(expect));
+
+ /* Check we got the right ones */
+ for (i = 0, s = expect; *s; s++, i++) {
+ int want = *s;
+ const char *name;
+ int got = ' ';
+
+ name = list[i] ? fdt_get_name(blob, list[i], NULL) : NULL;
+ if (name)
+ got = name[3] + 'a' - '0';
+
+ if (got != want) {
+ printf("Position %d: Expected '%c', got '%c' ('%s')\n",
+ i, want, got, name);
+ return 1;
+ }
+ }
+ va_end(ptr);
+
+ printf("pass\n");
+ return 0;
+}
+
+static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc,
+ char * const argv[])
+{
+ /* basic tests */
+ CHECKOK(run_test("", "", ""));
+ CHECKOK(run_test("1e 3d", "", ""));
+
+ /*
+ * 'a' represents 0, 'b' represents 1, etc.
+ * The first character is the alias number, the second is the node
+ * number. So the params mean:
+ * 0a 1b : point alias 0 to node 0 (a), alias 1 to node 1(b)
+ * ab : to create nodes 0 and 1 (a and b)
+ * ab : we expect the function to return two nodes, in
+ * the order 0, 1
+ */
+ CHECKOK(run_test("0a 1b", "ab", "ab"));
+
+ CHECKOK(run_test("0a 1c", "ab", "ab"));
+ CHECKOK(run_test("1c", "ab", "ab"));
+ CHECKOK(run_test("1b", "ab", "ab"));
+ CHECKOK(run_test("0b", "ab", "ba"));
+ CHECKOK(run_test("0b 2d", "dbc", "bcd"));
+ CHECKOK(run_test("0d 3a 1c 2b", "dbac", "dcba"));
+
+ /* things with holes */
+ CHECKOK(run_test("1b 3d", "dbc", "cb d"));
+ CHECKOK(run_test("1e 3d", "dbc", "bc d"));
+
+ /* no aliases */
+ CHECKOK(run_test("", "dbac", "dbac"));
+
+ /* disabled nodes */
+ CHECKOK(run_test("0d 3a 1c 2b", "dBac", "dc a"));
+ CHECKOK(run_test("0b 2d", "DBc", "c"));
+ CHECKOK(run_test("0b 4d 2c", "DBc", " c"));
+
+ /* conflicting aliases - first one gets it */
+ CHECKOK(run_test("2a 1a 0a", "a", " a"));
+ CHECKOK(run_test("0a 1a 2a", "a", "a"));
+
+ printf("Test passed\n");
+ return 0;
+}
+
+U_BOOT_CMD(
+ test_fdtdec, 3, 1, do_test_fdtdec,
+ "test_fdtdec",
+ "Run tests for fdtdec library");
--
1.7.3.1
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