/* * Copyright (c) 2023, ArtInChip Technology Co., Ltd * * SPDX-License-Identifier: Apache-2.0 * * Authors: xuan.wen */ #include #include #include #include #include #include #include #ifndef KERNEL_BAREMETAL #include #include #ifdef AIC_SPINOR_DRV #include #endif #else #include #if (defined (AIC_SPINOR_DRV) || defined (AIC_SPINAND_DRV)) #include #endif #endif #define O_RDONLY (00000000) #define O_WRONLY (00000001) #define O_RDWR (00000002) #define CONFIG_EXTRA_ENV_SETTINGS \ "upgrade_available=0\0" \ "bootlimit=5\0" \ "bootcount=0\0" \ "bootdelay=0\0" \ "osAB_next=A\0" \ "osAB_now=A\0" static char default_environment[] = { #ifdef CONFIG_EXTRA_ENV_SETTINGS CONFIG_EXTRA_ENV_SETTINGS #endif "\0" }; #ifdef AIC_SYS_REDUNDAND_ENVIRONMENT static int have_redund_env = 1; #else static int have_redund_env = 0; #endif static unsigned char active_flag = 1; /* obsolete_flag must be 0 to efficiently set it on NOR flash without erasing */ static unsigned char obsolete_flag = 0; static unsigned long usable_envsize; static int dev_current; static int bd = 0; //boot device struct env_image_single { uint32_t crc; /* CRC32 over data bytes */ char data[]; }; struct env_image_redundant { uint32_t crc; /* CRC32 over data bytes */ unsigned char flags; /* active or obsolete */ char data[]; }; enum flag_scheme { FLAG_NONE, FLAG_BOOLEAN, FLAG_INCREMENTAL, }; struct environment { void *image; uint32_t *crc; unsigned char *flags; char *data; enum flag_scheme flag_scheme; }; static struct environment environment = { .flag_scheme = FLAG_NONE, }; static int flash_io(int mode); #define SET_ENV_HELP \ "Usage: fw_setenv name value\n" \ "Modify variables in U-Boot environment\n" \ "Need to run cmd fw_setbd in advance\n" \ "Examples:\n" \ "fw_setenv foo bar set variable foo equal bar\n" \ "fw_setenv foo clear variable foo\n" #ifndef KERNEL_BAREMETAL static aicos_mutex_t lock_env = NULL; static int env_lock(void) { if (aicos_mutex_take(lock_env, AICOS_WAIT_FOREVER) == 0) return 0; else return -1; } static int env_unlock(void) { if (lock_env != NULL) { aicos_mutex_give(lock_env); return 0; } else { return -1; } } static int env_lock_init(void) { if (lock_env == NULL) { lock_env = aicos_mutex_create(); if (lock_env == NULL) return -1; } return 0; } #endif static const uint32_t crc32_table[256] = { 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }; static uint32_t crc32_0(const uint8_t *data, uint32_t length) { register uint32_t crc = 0xFFFFFFFF; while (length--) { crc = ((crc >> 8) & 0x00FFFFFF) ^ crc32_table[(crc ^ *data++) & 0x000000FF]; } return (crc ^ 0xFFFFFFFF); } static uint32_t crc32(uint32_t crc, const uint8_t *buf, uint32_t len) { return crc32_0(buf, len); } /* * s1 is either a simple 'name', or a 'name=value' pair. * s2 is a 'name=value' pair. * If the names match, return the value of s2, else NULL. */ static char *envmatch(char *s1, char *s2) { if (s1 == NULL || s2 == NULL) return NULL; while (*s1 == *s2++) if (*s1++ == '=') return s2; if (*s1 == '\0' && *(s2 - 1) == '=') return s2; return NULL; } /** * Search the environment for a variable. * Return the value, if found, or NULL, if not found. */ char *fw_getenv(char *name) { char *env, *nxt; for (env = environment.data; *env; env = nxt + 1) { char *val; for (nxt = env; *nxt; ++nxt) { if (nxt >= &environment.data[usable_envsize]) { pr_err("Environment not terminated\n"); return NULL; } } val = envmatch(name, env); if (!val) continue; return val; } return NULL; } /* * Set/Clear a single variable in the environment. * This is called in sequence to update the environment * in RAM without updating the copy in flash after each set */ int fw_env_write(char *name, char *value) { int len; char *env, *nxt; char *oldval = NULL; int deleting, creating, overwriting; /* * search if variable with this name already exists */ for (nxt = env = environment.data; *env; env = nxt + 1) { for (nxt = env; *nxt; ++nxt) { if (nxt >= &environment.data[usable_envsize]) { pr_err("Environment not terminated\n"); /* errno = EINVAL; */ return -1; } } oldval = envmatch(name, env); if (oldval) break; } deleting = (oldval && !(value && strlen(value))); creating = (!oldval && (value && strlen(value))); overwriting = (oldval && (value && strlen(value))); if (deleting) { printf("Env: delting\n"); } else if (overwriting) { pr_debug("Env: overwriting\n"); } else if (creating) { printf("Env: creating\n"); } else { printf("Env: nothing\n"); return 0; } if (deleting || overwriting) { if (*++nxt == '\0') { *env = '\0'; } else { for (;;) { *env = *nxt++; if ((*env == '\0') && (*nxt == '\0')) break; ++env; } } *++env = '\0'; } /* Delete only ? */ if (!value || !strlen(value)) return 0; /* * Append new definition at the end */ for (env = environment.data; *env || *(env + 1); ++env) continue; if (env > environment.data) ++env; /* * Overflow when: * "name" + "=" + "val" +"\0\0" > AIC_ENV_SIZE - (env-environment) */ len = strlen(name) + 2; /* add '=' for first arg, ' ' for all others */ len += strlen(value) + 1; if (len > (&environment.data[usable_envsize] - env)) { pr_err("Environment overflow, \"%s\" deleted\n", name); return -1; } while ((*env = *name++) != '\0') env++; *env = '='; while ((*++env = *value++) != '\0') continue; /* end is marked with double '\0' */ *++env = '\0'; return 0; } int fw_env_flush(void) { /* * Update CRC */ *environment.crc = crc32(0, (uint8_t *)environment.data, usable_envsize); /* write environment back to flash */ if (flash_io(O_RDWR)) { pr_err("Can't write fw_env to flash\n"); return -1; } return 0; } #ifdef AIC_SPINOR_DRV #ifndef KERNEL_BAREMETAL static int rtt_spinor_load_env_simple(void *buf, size_t size) { const struct fal_partition *env_current; if (dev_current == 0) { env_current = fal_partition_find(AIC_ENV_PART_NAME); } else if (dev_current == 1) { env_current = fal_partition_find(AIC_ENV_REDUNDAND_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (env_current == RT_NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -1; } if (fal_partition_read(env_current, 0, buf, size) != size) { pr_err("Fal read env fail\n"); return -1; } return 0; } static int rtt_spinor_save_env_simple(void *buf, size_t size) { const struct fal_partition *env_current; if (dev_current == 0) { env_current = fal_partition_find(AIC_ENV_REDUNDAND_PART_NAME); } else if (dev_current == 1) { env_current = fal_partition_find(AIC_ENV_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (env_current == RT_NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -1; } if (fal_partition_erase(env_current, 0, AIC_ENV_SIZE) < 0) { pr_err("Fal erase env fail\n"); return -1; } if (fal_partition_write(env_current, 0, buf, size) != size) { pr_err("Fal write env fail\n"); return -1; } return 0; } #else static int bar_spinor_load_env_simple(void *buf, size_t size) { struct mtd_dev *env_current; if (dev_current == 0) { env_current = mtd_get_device(AIC_ENV_PART_NAME); } else if (dev_current == 1) { env_current = mtd_get_device(AIC_ENV_REDUNDAND_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (env_current == NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -1; } if (mtd_read(env_current, 0, buf, size) < 0) { pr_err("Read env fail\n"); return -1; } return 0; } static int bar_spinor_save_env_simple(void *buf, size_t size) { struct mtd_dev *env_current; if (dev_current == 0) { env_current = mtd_get_device(AIC_ENV_REDUNDAND_PART_NAME); } else if (dev_current == 1) { env_current = mtd_get_device(AIC_ENV_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (env_current == NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -1; } if (mtd_erase(env_current, 0, AIC_ENV_SIZE)) { pr_err("Mtd erase env fail\n"); return -1; } if (mtd_write(env_current, 0, buf, size)) { pr_err("Mtd write env fail\n"); return -1; } return 0; } #endif #endif #ifdef AIC_SPINAND_DRV #ifndef KERNEL_BAREMETAL static int mtd_is_block_aligned(rt_off_t page, rt_uint32_t ppb) { if (page & (ppb - 1)) return 0; return 1; } static int rtt_spinand_load_env_simple(void *buf, size_t size) { struct rt_mtd_nand_device *mtd; rt_device_t dev; rt_err_t ret; rt_off_t offset = 0; rt_uint32_t page_id = 0, blk = 0, remain = 0; if (dev_current == 0) { dev = rt_device_find(AIC_ENV_PART_NAME); } else if (dev_current == 1) { dev = rt_device_find(AIC_ENV_REDUNDAND_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -RT_ERROR; } if (dev == RT_NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -RT_ERROR; } ret = rt_device_open(dev, RT_DEVICE_OFLAG_RDWR); if (ret) { pr_err("Open MTD env failed.!\n"); return ret; } mtd = (struct rt_mtd_nand_device *)dev; remain = size; while (remain) { page_id = offset / mtd->page_size; if (page_id > (mtd->block_total * mtd->pages_per_block)) { pr_err("All blocks in the part is bad!\n"); ret = -RT_ERROR; goto rtt_spinand_load_env_simple_exit; } blk = page_id / mtd->pages_per_block; if (mtd_is_block_aligned(page_id, mtd->pages_per_block) && rt_mtd_nand_check_block(mtd, blk) != RT_EOK) { pr_err("Block is bad, skip it.\n"); offset += mtd->pages_per_block * mtd->page_size; continue; } ret = rt_mtd_nand_read(mtd, page_id, buf, mtd->page_size, RT_NULL, 0); if (ret) { pr_err("Failed to read page data from NAND.\n"); ret = -RT_ERROR; goto rtt_spinand_load_env_simple_exit; } buf += mtd->page_size; offset += mtd->page_size; if (remain >= mtd->page_size) remain -= mtd->page_size; else remain = 0; } rtt_spinand_load_env_simple_exit: rt_device_close(dev); return ret; } static int rtt_spinand_save_env_simple(void *buf, size_t size) { struct rt_mtd_nand_device *mtd; rt_device_t dev; rt_err_t ret = 0; rt_off_t offset = 0; rt_uint32_t page_id = 0, blk = 0, remain = 0, goodblk = 0; if (dev_current == 0) { dev = rt_device_find(AIC_ENV_REDUNDAND_PART_NAME); } else if (dev_current == 1) { dev = rt_device_find(AIC_ENV_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -RT_ERROR; } if (dev == RT_NULL) { pr_err("Not found dev_current:%d\n", dev_current); return -RT_ERROR; } ret = rt_device_open(dev, RT_DEVICE_OFLAG_RDWR); if (ret) { pr_err("Open MTD env failed.!\n"); return ret; } mtd = (struct rt_mtd_nand_device *)dev; remain = size; while (!goodblk) { page_id = offset / mtd->page_size; if (page_id > (mtd->block_total * mtd->pages_per_block)) { pr_err("All blocks in the part is bad!\n"); ret = -RT_ERROR; goto rtt_spinand_save_env_simple; } blk = page_id / mtd->pages_per_block; if (rt_mtd_nand_check_block(mtd, blk) != RT_EOK) { pr_err("Block is bad, skip it.\n"); offset += mtd->pages_per_block * mtd->page_size; continue; } else { rt_mtd_nand_erase_block(mtd, blk); goodblk = true; } } while (remain) { page_id = offset / mtd->page_size; ret = rt_mtd_nand_write(mtd, page_id, buf, mtd->page_size, RT_NULL, 0); if (ret) { pr_err("Failed to write page data to NAND.\n"); ret = -RT_ERROR; goto rtt_spinand_save_env_simple; } buf += mtd->page_size; offset += mtd->page_size; if (remain >= mtd->page_size) remain -= mtd->page_size; else remain = 0; } rtt_spinand_save_env_simple: rt_device_close(dev); return ret; } #else static int bar_spinand_load_env_simple(void *buf, size_t size) { struct mtd_dev *env_current; unsigned long offset = 0; if (dev_current == 0) { env_current = mtd_get_device(AIC_ENV_PART_NAME); } else if (dev_current == 1) { env_current = mtd_get_device(AIC_ENV_REDUNDAND_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (mtd_block_isbad(env_current, offset)) { pr_err("Block is bad, skip it.\n"); offset += env_current->erasesize; if (offset >= env_current->size) { pr_err("All blocks in the part is bad!\n"); return -1; } } if (mtd_read(env_current, offset, buf, size) < 0) { pr_err("Read env fail\n"); return -1; } return 0; } static int bar_spinand_save_env_simple(void *buf, size_t size) { struct mtd_dev *env_current; unsigned long offset = 0; if (dev_current == 0) { env_current = mtd_get_device(AIC_ENV_REDUNDAND_PART_NAME); } else if (dev_current == 1) { env_current = mtd_get_device(AIC_ENV_PART_NAME); } else { pr_err("Invalid dev_current:%d\n", dev_current); return -1; } if (mtd_block_isbad(env_current, offset)) { pr_err("Block is bad, skip it.\n"); offset += env_current->erasesize; if (offset >= env_current->size) { pr_err("All blocks in the part is bad!\n"); return -1; } } if (mtd_erase(env_current, offset, AIC_ENV_SIZE)) { pr_err("Mtd erase env fail\n"); return -1; } if (mtd_write(env_current, offset, buf, size)) { pr_err("Mtd write env fail\n"); return -1; } return 0; } #endif #endif static int flash_env_read(void *buf, size_t size) { int ret = 0; switch (bd) { #ifdef AIC_SPINOR_DRV case BD_SPINOR: #ifndef KERNEL_BAREMETAL ret = rtt_spinor_load_env_simple(buf, size); #else ret = bar_spinor_load_env_simple(buf, size); #endif break; #endif #ifdef AIC_SPINAND_DRV case BD_SPINAND: #ifndef KERNEL_BAREMETAL ret = rtt_spinand_load_env_simple(buf, size); #else ret = bar_spinand_load_env_simple(buf, size); #endif break; #endif default: break; } if (ret) return ret; #ifdef AIC_ENV_DEBUG int i = 0, j = 0; char *str; str = buf; for (i = 0; i < size; i++) { printf("0x%x ", str[i]); j++; if (j >= 16) { printf("\n"); j = 0; } } #endif return 0; } static int flash_env_write(void *buf, size_t size) { int ret = 0; switch (environment.flag_scheme) { case FLAG_NONE: break; case FLAG_INCREMENTAL: (*environment.flags)++; break; case FLAG_BOOLEAN: *environment.flags = active_flag; break; default: pr_info("Unimplemented flash scheme %d\n", environment.flag_scheme); return -1; } switch (bd) { #ifdef AIC_SPINOR_DRV case BD_SPINOR: #ifndef KERNEL_BAREMETAL ret = rtt_spinor_save_env_simple(buf, size); #else ret = bar_spinor_save_env_simple(buf, size); #endif break; #endif #ifdef AIC_SPINAND_DRV case BD_SPINAND: #ifndef KERNEL_BAREMETAL ret = rtt_spinand_save_env_simple(buf, size); #else ret = bar_spinand_save_env_simple(buf, size); #endif break; #endif default: break; } if (ret) return ret; return 0; } static int flash_io(int mode) { void *buf; size_t size; int ret = 0; #ifndef KERNEL_BAREMETAL ret = env_lock(); if (ret) { pr_err("Lock env failed\n"); goto exit_flash_io; } #endif if (mode == O_RDWR) { buf = environment.image; size = AIC_ENV_SIZE; ret = flash_env_write(buf, size); } else { buf = environment.image; size = AIC_ENV_SIZE; ret = flash_env_read(buf, size); } #ifndef KERNEL_BAREMETAL ret = env_unlock(); if (ret) { ret = -1; pr_err("Unlock env failed\n"); } exit_flash_io: #endif return ret; } /* * Prevent confusion if running from erased flash memory */ int fw_env_open(void) { uint32_t crc0, crc0_ok; unsigned char flag0; void *addr0 = NULL; int crc1, crc1_ok; unsigned char flag1; void *addr1 = NULL; int ret; struct env_image_single *single; struct env_image_redundant *redundant; if (!bd) { bd = aic_get_boot_device(); if ((bd <= BD_NONE) || (bd >= BD_SDFAT32)) { pr_err("Parameter bd is not right\n"); return -1; } } #ifndef KERNEL_BAREMETAL ret = env_lock_init(); if (ret) { return -1; } #endif addr0 = aicos_malloc_align(0, AIC_ENV_SIZE, CACHE_LINE_SIZE); if (addr0 == NULL) { pr_err("Not enough memory for environment (%d bytes)\n", AIC_ENV_SIZE); ret = -1; goto open_cleanup; } /* read environment from FLASH to local buffer */ environment.image = addr0; if (have_redund_env) { redundant = addr0; environment.crc = &redundant->crc; environment.flags = &redundant->flags; environment.data = redundant->data; } else { single = addr0; environment.crc = &single->crc; environment.flags = NULL; environment.data = single->data; } usable_envsize = AIC_ENV_SIZE - sizeof(uint32_t); if (have_redund_env) usable_envsize -= sizeof(char); dev_current = 0; if (flash_io(O_RDONLY)) { ret = -EIO; goto open_cleanup; } crc0 = crc32(0, (uint8_t *)environment.data, usable_envsize); #ifdef AIC_ENV_DEBUG printf("crc0 = 0x%x,environment.crc = 0x%x\n", (unsigned int)crc0, (unsigned int)*environment.crc); #endif crc0_ok = (crc0 == *environment.crc); if (!have_redund_env) { if (!crc0_ok) { pr_err("Bad CRC, using default environment\n"); memcpy(environment.data, default_environment, sizeof(default_environment)); } } else { flag0 = *environment.flags; dev_current = 1; addr1 = aicos_malloc_align(0, AIC_ENV_SIZE, CACHE_LINE_SIZE); if (addr1 == NULL) { pr_err("Not enough memory for environment (%d bytes)\n", AIC_ENV_SIZE); ret = -ENOMEM; goto open_cleanup; } redundant = addr1; /* * have to set environment.image for flash_read(), careful - * other pointers in environment still point inside addr0 */ environment.image = addr1; if (flash_io(O_RDONLY)) { ret = -EIO; goto open_cleanup; } /* Check flag scheme compatibility */ /* uboot default is FLAG_INCREMENTAL */ environment.flag_scheme = FLAG_INCREMENTAL, crc1 = crc32(0, (uint8_t *)redundant->data, usable_envsize); #ifdef AIC_ENV_DEBUG printf("crc1 = 0x%x,redundant->crc = 0x%x\n", (unsigned int)crc1, (unsigned int)redundant->crc); #endif crc1_ok = (crc1 == redundant->crc); flag1 = redundant->flags; if (crc0_ok && !crc1_ok) { dev_current = 0; } else if (!crc0_ok && crc1_ok) { dev_current = 1; } else if (!crc0_ok && !crc1_ok) { pr_err("Warning: Bad CRC, using default environment\n"); memcpy(environment.data, default_environment, sizeof(default_environment)); dev_current = 0; } else { switch (environment.flag_scheme) { case FLAG_BOOLEAN: if (flag0 == active_flag && flag1 == obsolete_flag) { dev_current = 0; } else if (flag0 == obsolete_flag && flag1 == active_flag) { dev_current = 1; } else if (flag0 == flag1) { dev_current = 0; } else if (flag0 == 0xFF) { dev_current = 0; } else if (flag1 == 0xFF) { dev_current = 1; } else { dev_current = 0; } break; case FLAG_INCREMENTAL: if (flag0 == 255 && flag1 == 0) dev_current = 1; else if ((flag1 == 255 && flag0 == 0) || flag0 >= flag1) dev_current = 0; else /* flag1 > flag0 */ dev_current = 1; break; default: pr_info("Unknown flag scheme %d\n", environment.flag_scheme); ret = -1; goto open_cleanup; } } /* * If we are reading, we don't need the flag and the CRC any * more, if we are writing, we will re-calculate CRC and update * flags before writing out */ if (dev_current) { environment.image = addr1; environment.crc = &redundant->crc; environment.flags = &redundant->flags; environment.data = redundant->data; aicos_free_align(0, addr0); } else { environment.image = addr0; /* Other pointers are already set */ aicos_free_align(0, addr1); } } return 0; open_cleanup: if (addr0) { aicos_free_align(0, addr0); } if (addr1) { aicos_free_align(0, addr1); } return ret; } /* * Simply free allocated buffer with environment */ int fw_env_close(void) { int ret = 0; if (environment.image) { aicos_free_align(0, environment.image); } environment.image = NULL; return ret; } static int cmd_fw_printenv(int argc, char **argv) { int i, ret = 0; if (fw_env_open()) { pr_err("Open env failed\n"); return -1; } if (argc == 1) { /* Print all env variables */ char *env, *nxt; for (env = environment.data; *env; env = nxt + 1) { for (nxt = env; *nxt; ++nxt) { if (nxt >= &environment.data[usable_envsize]) { pr_err("Environment not terminated\n"); return -1; } } printf("%s\n", env); } fw_env_close(); return 0; } for (i = 1; i < argc; ++i) { /* print a subset of env variables */ char *name = argv[i]; char *val = NULL; val = fw_getenv(name); if (!val) { pr_err("\"%s\" not defined\n", name); ret = -1; continue; } pr_err("%s=%s\n", name, val); } fw_env_close(); return ret; } #ifndef KERNEL_BAREMETAL MSH_CMD_EXPORT_ALIAS(cmd_fw_printenv, fw_printenv, Print env); #else CONSOLE_CMD(fw_printenv, cmd_fw_printenv, "Print env"); #endif static int cmd_fw_setenv(int argc, char **argv) { int ret = 0; if ((argc != 3) && (argc != 2)) { printf(SET_ENV_HELP); return -1; } if (fw_env_open()) { ret = -1; goto fw_setenv_err; } ret = fw_env_write(argv[1], argv[2]); if (ret) { pr_err("Env write fail\n"); goto fw_setenv_err; } fw_env_flush(); fw_setenv_err: fw_env_close(); return ret; } #ifndef KERNEL_BAREMETAL MSH_CMD_EXPORT_ALIAS(cmd_fw_setenv, fw_setenv, Set env); #else CONSOLE_CMD(fw_setenv, cmd_fw_setenv, "Set env"); #endif