env_onenand.c 3.6 KB

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  1. /*
  2. * (C) Copyright 2005-2009 Samsung Electronics
  3. * Kyungmin Park <kyungmin.park@samsung.com>
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <common.h>
  24. #include <command.h>
  25. #include <environment.h>
  26. #include <linux/stddef.h>
  27. #include <malloc.h>
  28. #include <linux/mtd/compat.h>
  29. #include <linux/mtd/mtd.h>
  30. #include <linux/mtd/onenand.h>
  31. extern struct mtd_info onenand_mtd;
  32. extern struct onenand_chip onenand_chip;
  33. /* References to names in env_common.c */
  34. extern uchar default_environment[];
  35. char *env_name_spec = "OneNAND";
  36. #define ONENAND_MAX_ENV_SIZE 4096
  37. #define ONENAND_ENV_SIZE(mtd) (ONENAND_MAX_ENV_SIZE - ENV_HEADER_SIZE)
  38. #ifdef ENV_IS_EMBEDDED
  39. extern uchar environment[];
  40. env_t *env_ptr = (env_t *) (&environment[0]);
  41. #else /* ! ENV_IS_EMBEDDED */
  42. static unsigned char onenand_env[ONENAND_MAX_ENV_SIZE];
  43. env_t *env_ptr = (env_t *) onenand_env;
  44. #endif /* ENV_IS_EMBEDDED */
  45. DECLARE_GLOBAL_DATA_PTR;
  46. uchar env_get_char_spec(int index)
  47. {
  48. return (*((uchar *) (gd->env_addr + index)));
  49. }
  50. void env_relocate_spec(void)
  51. {
  52. struct mtd_info *mtd = &onenand_mtd;
  53. #ifdef CONFIG_ENV_ADDR_FLEX
  54. struct onenand_chip *this = &onenand_chip;
  55. #endif
  56. loff_t env_addr;
  57. int use_default = 0;
  58. size_t retlen;
  59. env_addr = CONFIG_ENV_ADDR;
  60. #ifdef CONFIG_ENV_ADDR_FLEX
  61. if (FLEXONENAND(this))
  62. env_addr = CONFIG_ENV_ADDR_FLEX;
  63. #endif
  64. /* Check OneNAND exist */
  65. if (mtd->writesize)
  66. /* Ignore read fail */
  67. mtd->read(mtd, env_addr, ONENAND_MAX_ENV_SIZE,
  68. &retlen, (u_char *) env_ptr);
  69. else
  70. mtd->writesize = MAX_ONENAND_PAGESIZE;
  71. if (crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd)) != env_ptr->crc)
  72. use_default = 1;
  73. if (use_default) {
  74. memcpy(env_ptr->data, default_environment,
  75. ONENAND_ENV_SIZE(mtd));
  76. env_ptr->crc =
  77. crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd));
  78. }
  79. gd->env_addr = (ulong) & env_ptr->data;
  80. gd->env_valid = 1;
  81. }
  82. int saveenv(void)
  83. {
  84. struct mtd_info *mtd = &onenand_mtd;
  85. #ifdef CONFIG_ENV_ADDR_FLEX
  86. struct onenand_chip *this = &onenand_chip;
  87. #endif
  88. loff_t env_addr = CONFIG_ENV_ADDR;
  89. struct erase_info instr = {
  90. .callback = NULL,
  91. };
  92. size_t retlen;
  93. instr.len = CONFIG_ENV_SIZE;
  94. #ifdef CONFIG_ENV_ADDR_FLEX
  95. if (FLEXONENAND(this)) {
  96. env_addr = CONFIG_ENV_ADDR_FLEX;
  97. instr.len = CONFIG_ENV_SIZE_FLEX;
  98. instr.len <<= onenand_mtd.eraseregions[0].numblocks == 1 ?
  99. 1 : 0;
  100. }
  101. #endif
  102. instr.addr = env_addr;
  103. instr.mtd = mtd;
  104. if (mtd->erase(mtd, &instr)) {
  105. printf("OneNAND: erase failed at 0x%08llx\n", env_addr);
  106. return 1;
  107. }
  108. /* update crc */
  109. env_ptr->crc = crc32(0, env_ptr->data, ONENAND_ENV_SIZE(mtd));
  110. if (mtd->write(mtd, env_addr, ONENAND_MAX_ENV_SIZE, &retlen,
  111. (u_char *) env_ptr)) {
  112. printf("OneNAND: write failed at 0x%llx\n", instr.addr);
  113. return 2;
  114. }
  115. return 0;
  116. }
  117. int env_init(void)
  118. {
  119. /* use default */
  120. gd->env_addr = (ulong) & default_environment[0];
  121. gd->env_valid = 1;
  122. return 0;
  123. }