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. (note there are a few minor inconsistencies with this patch which will be cleaned up when the USB series is applied) Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>master
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/*
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* Some very basic tests for fdtdec, accessed through test_fdtdec command. |
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* They are easiest to use with sandbox. |
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* |
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* Copyright (c) 2011 The Chromium OS Authors. |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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#include <common.h> |
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#include <fdtdec.h> |
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#include <libfdt.h> |
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#include <malloc.h> |
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#include <os.h> |
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/* The size of our test fdt blob */ |
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#define FDT_SIZE (16 * 1024) |
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/**
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* Check if an operation failed, and if so, print an error |
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* |
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* @param oper_name Name of operation |
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* @param err Error code to check |
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* |
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* @return 0 if ok, -1 if there was an error |
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*/ |
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static int fdt_checkerr(const char *oper_name, int err) |
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{ |
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if (err) { |
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printf("%s: %s: %s\n", __func__, oper_name, fdt_strerror(err)); |
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return -1; |
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} |
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return 0; |
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} |
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/**
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* Check the result of an operation and if incorrect, print an error |
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* |
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* @param oper_name Name of operation |
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* @param expected Expected value |
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* @param value Actual value |
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* |
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* @return 0 if ok, -1 if there was an error |
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*/ |
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static int checkval(const char *oper_name, int expected, int value) |
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{ |
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if (expected != value) { |
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printf("%s: %s: expected %d, but returned %d\n", __func__, |
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oper_name, expected, value); |
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return -1; |
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} |
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return 0; |
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} |
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#define CHECK(op) if (fdt_checkerr(#op, op)) return -1 |
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#define CHECKVAL(op, expected) \ |
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if (checkval(#op, expected, op)) \
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return -1 |
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#define CHECKOK(op) CHECKVAL(op, 0) |
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/* maximum number of nodes / aliases to generate */ |
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#define MAX_NODES 20 |
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/*
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* Make a test fdt |
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* |
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* @param fdt Device tree pointer |
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* @param size Size of device tree blob |
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* @param aliases Specifies alias assignments. Format is a list of items |
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* separated by space. Items are #a where |
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* # is the alias number |
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* a is the node to point to |
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* @param nodes Specifies nodes to generate (a=0, b=1), upper case |
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* means to create a disabled node |
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*/ |
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static int make_fdt(void *fdt, int size, const char *aliases, |
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const char *nodes) |
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{ |
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char name[20], value[20]; |
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const char *s; |
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int fd; |
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CHECK(fdt_create(fdt, size)); |
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CHECK(fdt_finish_reservemap(fdt)); |
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CHECK(fdt_begin_node(fdt, "")); |
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CHECK(fdt_begin_node(fdt, "aliases")); |
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for (s = aliases; *s;) { |
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sprintf(name, "i2c%c", *s); |
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sprintf(value, "/i2c%d@0", s[1] - 'a'); |
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CHECK(fdt_property_string(fdt, name, value)); |
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s += 2 + (s[2] != '\0'); |
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} |
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CHECK(fdt_end_node(fdt)); |
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for (s = nodes; *s; s++) { |
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sprintf(value, "i2c%d@0", (*s & 0xdf) - 'A'); |
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CHECK(fdt_begin_node(fdt, value)); |
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CHECK(fdt_property_string(fdt, "compatible", |
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fdtdec_get_compatible(COMPAT_UNKNOWN))); |
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if (*s <= 'Z') |
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CHECK(fdt_property_string(fdt, "status", "disabled")); |
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CHECK(fdt_end_node(fdt)); |
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} |
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CHECK(fdt_end_node(fdt)); |
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CHECK(fdt_finish(fdt)); |
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CHECK(fdt_pack(fdt)); |
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#if defined(DEBUG) && defined(CONFIG_SANDBOX) |
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fd = os_open("/tmp/fdtdec-text.dtb", OS_O_CREAT | OS_O_WRONLY); |
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if (fd == -1) { |
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printf("Could not open .dtb file to write\n"); |
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return -1; |
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} |
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os_write(fd, fdt, size); |
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os_close(fd); |
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#endif |
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return 0; |
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} |
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static int run_test(const char *aliases, const char *nodes, const char *expect) |
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{ |
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int list[MAX_NODES]; |
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const char *s; |
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void *blob; |
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int i; |
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blob = malloc(FDT_SIZE); |
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if (!blob) { |
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printf("%s: out of memory\n", __func__); |
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return 1; |
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} |
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printf("aliases=%s, nodes=%s, expect=%s: ", aliases, nodes, expect); |
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CHECKVAL(make_fdt(blob, FDT_SIZE, aliases, nodes), 0); |
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CHECKVAL(fdtdec_find_aliases_for_id(blob, "i2c", |
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COMPAT_UNKNOWN, |
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list, ARRAY_SIZE(list)), strlen(expect)); |
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/* Check we got the right ones */ |
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for (i = 0, s = expect; *s; s++, i++) { |
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int want = *s; |
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const char *name; |
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int got = ' '; |
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name = list[i] ? fdt_get_name(blob, list[i], NULL) : NULL; |
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if (name) |
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got = name[3] + 'a' - '0'; |
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if (got != want) { |
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printf("Position %d: Expected '%c', got '%c' ('%s')\n", |
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i, want, got, name); |
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return 1; |
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} |
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} |
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printf("pass\n"); |
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return 0; |
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} |
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static int do_test_fdtdec(cmd_tbl_t *cmdtp, int flag, int argc, |
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char * const argv[]) |
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{ |
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/* basic tests */ |
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CHECKOK(run_test("", "", "")); |
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CHECKOK(run_test("1e 3d", "", "")); |
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/*
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* 'a' represents 0, 'b' represents 1, etc. |
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* The first character is the alias number, the second is the node |
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* number. So the params mean: |
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* 0a 1b : point alias 0 to node 0 (a), alias 1 to node 1(b) |
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* ab : to create nodes 0 and 1 (a and b) |
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* ab : we expect the function to return two nodes, in |
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* the order 0, 1 |
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*/ |
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CHECKOK(run_test("0a 1b", "ab", "ab")); |
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CHECKOK(run_test("0a 1c", "ab", "ab")); |
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CHECKOK(run_test("1c", "ab", "ab")); |
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CHECKOK(run_test("1b", "ab", "ab")); |
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CHECKOK(run_test("0b", "ab", "ba")); |
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CHECKOK(run_test("0b 2d", "dbc", "bcd")); |
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CHECKOK(run_test("0d 3a 1c 2b", "dbac", "dcba")); |
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/* things with holes */ |
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CHECKOK(run_test("1b 3d", "dbc", "cb d")); |
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CHECKOK(run_test("1e 3d", "dbc", "bc d")); |
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/* no aliases */ |
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CHECKOK(run_test("", "dbac", "dbac")); |
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/* disabled nodes */ |
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CHECKOK(run_test("0d 3a 1c 2b", "dBac", "dc a")); |
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CHECKOK(run_test("0b 2d", "DBc", "c")); |
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CHECKOK(run_test("0b 4d 2c", "DBc", " c")); |
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/* conflicting aliases - first one gets it */ |
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CHECKOK(run_test("2a 1a 0a", "a", " a")); |
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CHECKOK(run_test("0a 1a 2a", "a", "a")); |
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printf("Test passed\n"); |
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return 0; |
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} |
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U_BOOT_CMD( |
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test_fdtdec, 3, 1, do_test_fdtdec, |
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"test_fdtdec", |
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"Run tests for fdtdec library"); |
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