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-rw-r--r--util/gen_bmi_config.c307
1 files changed, 0 insertions, 307 deletions
diff --git a/util/gen_bmi_config.c b/util/gen_bmi_config.c
deleted file mode 100644
index 44456cf1cc..0000000000
--- a/util/gen_bmi_config.c
+++ /dev/null
@@ -1,307 +0,0 @@
-/*
- * Copyright 2020 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * TODO(b/160330682): Eliminate or reduce size of BMI260 initialization file.
- *
- * Once the BMI260 initialization file is moved to the kernel's rootfs, this
- * entire file can be deleted.
- */
-
-/*
- * This utility is used to generate a compressed version of the BMI260
- * configuration file.
- *
- * This uses a very simple, but lightweight compression algorithm to detect
- * duplicated 32-bit words in the configuration data.
- *
- * Compression scheme:
- * Repeated 32-bit words are replaced by a 16-bit key, 16-bit count, and
- * the 32-bit data word. All values stored big-endian.
- *
- * For example, if the uncompressed file had the following data words:
- * 0x89ABCDEF 0x89ABCDEF 0x89ABCDEF
- *
- * This is represented compressed as (key 0xE9EA):
- * 0xE9EA0003 0x89ABCDEF
- *
- * Key value (0xE9EA) chosen as it wasn't found in the BMI configuration
- * data.
- */
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "endian.h"
-
-/*
- * This key is chosen because it isn't used by the BMI260 config file.
- */
-#define COMPRESS_KEY 0xE9EA
-
-static int word_compress(uint32_t *buffer, int word_length,
- const char *outfilename)
-{
- FILE *file_p;
- const uint16_t key = COMPRESS_KEY;
- uint16_t out16;
- uint16_t in16;
- unsigned int outsize;
- uint32_t prev_word;
- int repeat_count;
- int i;
-
- file_p = fopen(outfilename, "wb+");
- if (!file_p) {
- fprintf(stderr, "Failed to open output file %s\n", outfilename);
- return -1;
- }
-
- prev_word = ~buffer[0];
- repeat_count = 1;
- outsize = 0;
-
- for (i = 0; i < word_length; i++) {
- in16 = *(uint16_t *)&buffer[i];
- in16 = be16toh(in16);
-
- if (in16 == COMPRESS_KEY) {
- fprintf(stderr, "ERROR: input data contains "
- "compression key value 0x%04x\n",
- COMPRESS_KEY);
- fprintf(stderr, "Compression of input data not "
- "supported.\n");
- outsize = -1;
- goto early_exit;
- }
-
- if (buffer[i] == prev_word && (repeat_count < 255)) {
- repeat_count++;
- } else {
- if (repeat_count > 2) {
- printf("Offset 0x%08lx: Write repeated "
- "signature: 0x%04x 0x%04x 0x%08x\n",
- ftell(file_p), key, repeat_count,
- prev_word);
- out16 = htobe16(key);
- fwrite(&out16, sizeof(out16), 1, file_p);
- out16 = htobe16(repeat_count);
- fwrite(&out16, sizeof(out16), 1, file_p);
- outsize += 2 * sizeof(out16);
-
- /*
- * Write out original data as bytes
- * to preserve original order.
- */
- fwrite(&prev_word, 1, sizeof(prev_word),
- file_p);
- outsize += sizeof(prev_word);
- } else if (i != 0) {
- do {
- fwrite(&prev_word, 1, sizeof(prev_word),
- file_p);
- outsize += sizeof(prev_word);
- } while (--repeat_count > 0);
- }
-
- prev_word = buffer[i];
- repeat_count = 1;
- }
- }
-
- /* Write the last word or repeated words */
- if (repeat_count > 2) {
- printf("Offset 0x%08lx: Write repeated signature: "
- "0x%04x 0x%04x 0x%08x\n",
- ftell(file_p), key, repeat_count, prev_word);
- fwrite(&out16, sizeof(out16), 1, file_p);
- out16 = htobe16(repeat_count);
- fwrite(&out16, sizeof(out16), 1, file_p);
- outsize += 2 * sizeof(out16);
-
- fwrite(&prev_word, 1, sizeof(prev_word), file_p);
- outsize += sizeof(prev_word);
- } else if (i != 0) {
- do {
- fwrite(&prev_word, 1, sizeof(prev_word), file_p);
- outsize += sizeof(prev_word);
- } while (--repeat_count > 0);
- }
-
- if (outsize != ftell(file_p)) {
- fprintf(stderr, "Compression failed, write %d bytes, but file "
- "size is only %ld bytes\n",
- outsize, ftell(file_p));
- outsize = -1;
- goto early_exit;
- }
-
-early_exit:
- fclose(file_p);
-
- return outsize;
-}
-
-static int word_decompress(uint32_t *buffer,
- int word_length,
- const char *outfilename)
-{
- FILE *file_p;
- uint16_t *buf16;
- uint16_t key;
- uint16_t repeat_count;
- unsigned int outsize;
- uint32_t out_word;
- int i;
-
- file_p = fopen(outfilename, "wb+");
- if (!file_p) {
- fprintf(stderr, "Failed to open output file %s\n", outfilename);
- return -1;
- }
-
- repeat_count = 0;
- outsize = 0;
-
- for (i = 0; i < word_length; i++) {
- buf16 = (uint16_t *)&buffer[i];
- key = be16toh(*buf16);
-
- if (key == COMPRESS_KEY) {
- repeat_count = be16toh(*++buf16);
-
- if (repeat_count == 0) {
- fprintf(stderr, "Incorrect repeat count found "
- "in compressed file\n");
- outsize = -1;
- goto early_exit;
- }
-
- /*
- * Note - this advances the loop to the next word
- * in the buffer.
- */
- if (++i >= word_length) {
- fprintf(stderr, "Unexpected file end during "
- "decompress\n");
- outsize = -1;
- goto early_exit;
- }
-
- out_word = buffer[i];
- while (repeat_count-- > 0) {
- fwrite(&out_word, 4, 1, file_p);
- outsize += sizeof(out_word);
- }
- } else {
- fwrite(&buffer[i], 4, 1, file_p);
- outsize += sizeof(buffer[i]);
- }
- }
-
-early_exit:
- fclose(file_p);
-
- return outsize;
-}
-
-static void print_help(char *cmd_name)
-{
- printf("\nUsage: %s <compress|decompress> <infile> <outfile>\n"
- "\n"
- "Utility to compress/decompress BMI IMU config binaries.\n",
- cmd_name);
-}
-
-int main(int argc, char *argv[])
-{
- uint32_t *buffer;
- int outsize;
- char *infilename;
- char *outfilename;
- FILE *f;
- long size;
- size_t read_words;
-
- if (argc < 4) {
- fprintf(stderr, "Unknown option or missing value\n");
- print_help(argv[0]);
- return EXIT_FAILURE;
- }
-
- infilename = argv[2];
- outfilename = argv[3];
-
- printf("Input (%s), output (%s)\n", infilename, outfilename);
-
- f = fopen(infilename, "rb");
-
- if (!f) {
- fprintf(stderr, "Failed to open input file %s\n", infilename);
- print_help(argv[0]);
- return EXIT_FAILURE;
- }
-
- fseek(f, 0, SEEK_END);
- size = ftell(f);
- rewind(f);
-
- printf("Infile (%s) size %ld (bytes)\n", infilename, size);
- buffer = malloc(size);
- size /= 4;
- if (!buffer) {
- fprintf(stderr, "Failed to allocate memory. "
- "Input file size %ld bytes\n",
- size * 4);
- fclose(f);
- return EXIT_FAILURE;
- }
-
- read_words = fread(buffer, 4, size, f);
- if (read_words != size) {
- fprintf(stderr, "Unable to read from %s, "
- "words read %ld, needed %ld\n",
- infilename, read_words, size);
- fclose(f);
- free(buffer);
- return EXIT_FAILURE;
- }
-
- fclose(f);
-
- printf("Input file closed\n");
-
- if (!strncmp(argv[1], "compress", sizeof("compress"))) {
- outsize = word_compress(buffer, size, outfilename);
- if (outsize < 0) {
- free(buffer);
- return EXIT_FAILURE;
- }
-
- printf("Compressed file %s created - %d bytes "
- "(saves %ld bytes)\n",
- outfilename, outsize, (size * 4) - outsize);
- } else if (!strncmp(argv[1], "decompress", sizeof("decompress"))) {
- outsize = word_decompress(buffer, size, outfilename);
- if (outsize < 0) {
- free(buffer);
- return EXIT_FAILURE;
- }
-
- printf("Decompressed file %s created - %d bytes\n",
- outfilename, outsize);
- } else {
- fprintf(stderr, "Invalid parameter 1, "
- "must be compress/decoompress\n");
- print_help(argv[0]);
- free(buffer);
- return EXIT_FAILURE;
- }
-
- free(buffer);
-
- return EXIT_SUCCESS;
-}
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