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lib/fdtdec_test.c
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * 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. |
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*/ #include <common.h> #include <fdtdec.h> |
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#include <linux/libfdt.h> |
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#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 ", __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 ", __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@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@0", (*s & 0xdf) - 'A'); CHECK(fdt_begin_node(fdt, value)); CHECK(fdt_property_string(fdt, "compatible", fdtdec_get_compatible(COMPAT_UNKNOWN))); 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 "); 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; void *blob; int i; blob = malloc(FDT_SIZE); if (!blob) { printf("%s: out of memory ", __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_UNKNOWN, 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') ", i, want, got, name); return 1; } } printf("pass "); 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 "); return 0; } U_BOOT_CMD( test_fdtdec, 3, 1, do_test_fdtdec, "test_fdtdec", "Run tests for fdtdec library"); |