+++ /dev/null
-/*
- * Copyright (c) 2006 OpenedHand Ltd.
- *
- * This file is licensed under GNU GPL v2.
- */
-#include <string.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <stdlib.h>
-
-#define TFR(_) _
-#define VERBOSE
-#define PBAR_LEN 40
-
-#define PARTITION_START 0x00700000
-
-static const int ecc_pos8[] = {
- 0x0, 0x1, 0x2,
-};
-
-static const int ecc_pos16[] = {
- 0x0, 0x1, 0x2, 0x3, 0x6, 0x7,
-};
-
-static const int ecc_pos64[] = {
- 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
- 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
-};
-
-static const int ecc_akita[] = {
- 0x05, 0x01, 0x02, 0x03, 0x06, 0x07, 0x15, 0x11,
- 0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23,
- 0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37,
-};
-
-struct jffs_marker_s {
- int pos;
- uint8_t value;
-};
-
-static const struct jffs_marker_s free_pos8[] = {
- { 0x03, 0xff }, { 0x04, 0xff }, { 0x06, 0x85 }, { 0x07, 0x19 },
- { -1 },
-};
-
-static const struct jffs_marker_s free_pos16[] = {
- { 0x08, 0x85 }, { 0x09, 0x19 }, { 0x0a, 0x03 }, { 0x0b, 0x20 },
- { 0x0c, 0x08 }, { 0x0d, 0x00 }, { 0x0e, 0x00 }, { 0x0f, 0x00 },
- { -1 },
-};
-
-static const struct jffs_marker_s free_pos64[] = {
- { 0x02, 0xff }, { 0x03, 0xff }, { 0x04, 0xff }, { 0x05, 0xff },
- { 0x06, 0xff }, { 0x07, 0xff }, { 0x08, 0xff }, { 0x09, 0xff },
- { 0x0a, 0xff }, { 0x0b, 0xff }, { 0x0c, 0xff }, { 0x0d, 0xff },
- { 0x0e, 0xff }, { 0x0f, 0xff }, { 0x10, 0x85 }, { 0x11, 0x19 },
- { 0x12, 0x03 }, { 0x13, 0x20 }, { 0x14, 0x08 }, { 0x15, 0x00 },
- { 0x16, 0x00 }, { 0x17, 0x00 }, { 0x18, 0xff }, { 0x19, 0xff },
- { 0x1a, 0xff }, { 0x1b, 0xff }, { 0x1c, 0xff }, { 0x1d, 0xff },
- { 0x1e, 0xff }, { 0x1f, 0xff }, { 0x20, 0xff }, { 0x21, 0xff },
- { 0x22, 0xff }, { 0x23, 0xff }, { 0x24, 0xff }, { 0x25, 0xff },
- { 0x26, 0xff }, { 0x27, 0xff },
- { -1 },
-};
-
-static const struct jffs_marker_s free_akita[] = {
- { 0x08, 0x85 }, { 0x09, 0x19 }, { 0x0a, 0x03 }, { 0x0b, 0x20 },
- { 0x0c, 0x08 }, { 0x0d, 0x00 }, { 0x0e, 0x00 }, { 0x0f, 0x00 },
- { 0x10, 0xff },
- { -1 },
-};
-
-#define LEN(array) (sizeof(array) / sizeof(*array))
-
-static const struct ecc_style_s {
- int page_size;
- int oob_size;
- int eccbytes;
- int eccsize;
- const int *eccpos;
- int romsize;
- const struct jffs_marker_s *freepos;
-} spitz = {
- 0x200, 0x10, 0x100, LEN(ecc_pos16), ecc_pos16, 0x01000000, free_pos16
-}, akita = {
- 0x800, 0x40, 0x100, LEN(ecc_akita), ecc_akita, 0x08000000, free_akita
-}, borzoi = {
- 0x800, 0x40, 0x100, LEN(ecc_akita), ecc_akita, 0x08000000, free_akita
-}, terrier = {
- 0x800, 0x40, 0x100, LEN(ecc_akita), ecc_akita, 0x08000000, free_akita
-};
-
-struct ecc_state_s {
- int count;
- uint8_t cp;
- uint8_t lp[2];
- const struct ecc_style_s *style;
-};
-
-#ifndef flash2raw
-/*
- * Pre-calculated 256-way 1 byte column parity. Table borrowed from Linux.
- */
-static const uint8_t ecc_precalc_table[] = {
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
- 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
- 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
- 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
- 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
- 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
- 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
- 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
- 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30,
- 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55,
- 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56,
- 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33,
- 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59,
- 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c,
- 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f,
- 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a,
- 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
-};
-
-/* Update ECC parity count */
-static inline uint8_t ecc_digest(struct ecc_state_s *s, uint8_t sample) {
- uint8_t idx = ecc_precalc_table[sample];
-
- s->cp ^= idx & 0x3f;
- if (idx & 0x40) {
- s->lp[0] ^= ~(s->count & 0xff);
- s->lp[1] ^= s->count & 0xff;
- }
- s->count ++;
-
- return sample;
-}
-
-static void buffer_digest(struct ecc_state_s *ecc,
- const uint8_t *buf, uint8_t *out) {
- int i, lp_a[2];
-
- ecc->lp[0] = 0x00;
- ecc->lp[1] = 0x00;
- ecc->cp = 0x00;
- ecc->count = 0;
- for (i = 0; i < ecc->style->eccbytes; i ++)
- ecc_digest(ecc, buf[i]);
-
-# define BSHR(byte, from, to) ((ecc->lp[byte] >> (from - to)) & (1 << to))
- lp_a[0] =
- BSHR(0, 4, 0) | BSHR(0, 5, 2) |
- BSHR(0, 6, 4) | BSHR(0, 7, 6) |
- BSHR(1, 4, 1) | BSHR(1, 5, 3) |
- BSHR(1, 6, 5) | BSHR(1, 7, 7);
-
-# define BSHL(byte, from, to) ((ecc->lp[byte] << (to - from)) & (1 << to))
- lp_a[1] =
- BSHL(0, 0, 0) | BSHL(0, 1, 2) |
- BSHL(0, 2, 4) | BSHL(0, 3, 6) |
- BSHL(1, 0, 1) | BSHL(1, 1, 3) |
- BSHL(1, 2, 5) | BSHL(1, 3, 7);
-
- out[0] = ~lp_a[1];
- out[1] = ~lp_a[0];
- out[2] = (~ecc->cp << 2) | 0x03;
-}
-
-static void jffs2_format(const struct ecc_state_s *ecc, uint8_t oob[]) {
- const struct jffs_marker_s *byte;
- for (byte = ecc->style->freepos; byte->pos >= 0; byte ++)
- oob[byte->pos] = byte->value;
-}
-
-static void buffer_fill(const struct ecc_state_s *ecc, uint8_t buffer[],
- int *len, int *partition, int count, uint8_t jffs_buffer[]) {
- int ret;
-
- switch (*partition) {
- case 0:
- if (count < PARTITION_START) {
- memcpy(buffer, jffs_buffer + count,
- ecc->style->eccbytes);
- *len = ecc->style->eccbytes;
- break;
- }
- *partition = 1;
- case 1:
- if (count - PARTITION_START < PARTITION_START) {
- memcpy(buffer, jffs_buffer + count - PARTITION_START,
- ecc->style->eccbytes);
- *len = ecc->style->eccbytes;
- break;
- }
-
- while (*len < ecc->style->eccbytes) {
- ret = TFR(read(0, buffer + *len, 0x800 - *len));
- if (ret <= 0)
- break;
- *len += ret;
- }
-
- if (*len == 0)
- *partition = 2;
- else if (*len < ecc->style->eccbytes) {
- fprintf(stderr, "\nWarning: %i stray bytes\n", *len);
- memset(buffer + *len, 0xff,
- ecc->style->eccbytes - *len);
- *len = ecc->style->eccbytes;
- break;
- } else
- break;
- case 2:
- memset(buffer, 0xff, ecc->style->eccbytes);
- *len = ecc->style->eccbytes;
- break;
- }
-}
-
-int main(int argc, char *argv[], char *envp[]) {
- struct ecc_state_s ecc;
- uint8_t buffer[0x1000], ecc_payload[0x40], regs[3], *jffs;
- int ret, len, eccbyte, count, partition;
-
- /* Check if we're called by "raw2flash.spitz" or similar */
- len = strlen(argv[0]);
- if (!strcasecmp(argv[0] + len - 5, "akita"))
- ecc.style = &akita;
- else if (!strcasecmp(argv[0] + len - 6, "borzoi"))
- ecc.style = &borzoi;
- else if (!strcasecmp(argv[0] + len - 7, "terrier"))
- ecc.style = &terrier;
- else
- ecc.style = &spitz;
-
-# ifdef VERBOSE
- fprintf(stderr, "[");
-# endif
-
- /* Skip first 10 bytes */
- TFR(read(0, buffer, 0x10));
-
- len = 0;
- jffs = (uint8_t *) malloc(PARTITION_START);
- while (len < PARTITION_START) {
- ret = TFR(read(0, jffs + len, PARTITION_START - len));
- if (ret <= 0)
- break;
- len += ret;
- }
-
- /* Convert data from stdin */
- partition = len = eccbyte = count = 0;
- memset(ecc_payload, 0xff, ecc.style->oob_size);
- jffs2_format(&ecc, ecc_payload);
- while (count < ecc.style->romsize) {
- buffer_fill(&ecc, buffer, &len, &partition, count, jffs);
- buffer_digest(&ecc, buffer, regs);
-
- ecc_payload[ecc.style->eccpos[eccbyte ++]] = regs[0];
- ecc_payload[ecc.style->eccpos[eccbyte ++]] = regs[1];
- ecc_payload[ecc.style->eccpos[eccbyte ++]] = regs[2];
-
- TFR(write(1, buffer, ecc.style->eccbytes));
- count += ecc.style->eccbytes;
- len -= ecc.style->eccbytes;
- memmove(buffer, buffer + ecc.style->eccbytes, len);
-
- if (eccbyte >= ecc.style->eccsize) {
- TFR(write(1, ecc_payload, ecc.style->oob_size));
- eccbyte = 0;
- memset(ecc_payload, 0xff, ecc.style->oob_size);
- if (partition < 2)
- jffs2_format(&ecc, ecc_payload);
- }
-
-# ifdef VERBOSE
- if (count * PBAR_LEN / ecc.style->romsize >
- (count - ecc.style->eccbytes) *
- PBAR_LEN / ecc.style->romsize)
- fprintf(stderr, "#");
-# endif
- }
-
-# ifdef VERBOSE
- fprintf(stderr, "]\n");
-# endif
- free(jffs);
- return 0;
-}
-#else
-int main(int argc, char *argv[], char *envp[]) {
- struct ecc_state_s ecc;
- uint8_t buffer[0x1000];
- int ret, len, count;
-
- /* Check if we're called by "flash2raw.spitz" or similar */
- len = strlen(argv[0]);
- if (!strcasecmp(argv[0] + len - 5, "akita"))
- ecc.style = &akita;
- else if (!strcasecmp(argv[0] + len - 6, "borzoi"))
- ecc.style = &borzoi;
- else if (!strcasecmp(argv[0] + len - 7, "terrier"))
- ecc.style = &terrier;
- else
- ecc.style = &spitz;
-
-# ifdef VERBOSE
- fprintf(stderr, "[");
-# endif
-
- /* Convert data from stdin */
- count = 0;
- while (count < ecc.style->romsize) {
- len = 0;
- while (len < ecc.style->page_size) {
- ret = TFR(read(0, buffer + len,
- ecc.style->page_size - len));
- if (ret <= 0)
- break;
- len += ret;
- }
- if (len == 0)
- break;
- if (len < ecc.style->page_size) {
- fprintf(stderr, "\nWarning: %i stray bytes\n", len);
- }
-
- TFR(write(1, buffer, ecc.style->page_size));
-
- count += len;
- len = 0;
- while (len < ecc.style->oob_size) {
- ret = TFR(read(0, buffer, ecc.style->oob_size - len));
- if (ret <= 0)
- break;
- len += ret;
- }
-
-# ifdef VERBOSE
- if (count * PBAR_LEN / ecc.style->romsize >
- (count - ecc.style->page_size) *
- PBAR_LEN / ecc.style->romsize)
- fprintf(stderr, "#");
-# endif
- }
-
-# ifdef VERBOSE
- fprintf(stderr, "]\n");
-# endif
- return 0;
-}
-#endif
