1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2000-2010
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Andreas Heppel <aheppel@sysgo.de>
9 * (C) Copyright 2008 Atmel Corporation
14 #include <env_internal.h>
18 #include <spi_flash.h>
22 #include <asm/cache.h>
23 #include <asm/global_data.h>
24 #include <dm/device-internal.h>
25 #include <u-boot/crc.h>
27 #ifndef CONFIG_SPL_BUILD
31 #define OFFSET_INVALID (~(u32)0)
33 #ifdef CONFIG_ENV_OFFSET_REDUND
34 #define ENV_OFFSET_REDUND CONFIG_ENV_OFFSET_REDUND
36 static ulong env_offset = CONFIG_ENV_OFFSET;
37 static ulong env_new_offset = CONFIG_ENV_OFFSET_REDUND;
41 #define ENV_OFFSET_REDUND OFFSET_INVALID
43 #endif /* CONFIG_ENV_OFFSET_REDUND */
45 DECLARE_GLOBAL_DATA_PTR;
47 static struct spi_flash *env_flash;
49 static int setup_flash_device(void)
51 #if CONFIG_IS_ENABLED(DM_SPI_FLASH)
55 /* speed and mode will be read from DT */
56 ret = spi_flash_probe_bus_cs(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
57 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE,
60 env_set_default("spi_flash_probe_bus_cs() failed", 0);
64 env_flash = dev_get_uclass_priv(new);
67 spi_flash_free(env_flash);
69 env_flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
70 CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
72 env_set_default("spi_flash_probe() failed", 0);
79 #if defined(CONFIG_ENV_OFFSET_REDUND)
80 static int env_sf_save(void)
83 char *saved_buffer = NULL, flag = ENV_REDUND_OBSOLETE;
84 u32 saved_size = 0, saved_offset = 0, sector;
85 u32 sect_size = CONFIG_ENV_SECT_SIZE;
88 ret = setup_flash_device();
92 if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
93 sect_size = env_flash->mtd.erasesize;
95 ret = env_export(&env_new);
98 env_new.flags = ENV_REDUND_ACTIVE;
100 if (gd->env_valid == ENV_VALID) {
101 env_new_offset = CONFIG_ENV_OFFSET_REDUND;
102 env_offset = CONFIG_ENV_OFFSET;
104 env_new_offset = CONFIG_ENV_OFFSET;
105 env_offset = CONFIG_ENV_OFFSET_REDUND;
108 /* Is the sector larger than the env (i.e. embedded) */
109 if (sect_size > CONFIG_ENV_SIZE) {
110 saved_size = sect_size - CONFIG_ENV_SIZE;
111 saved_offset = env_new_offset + CONFIG_ENV_SIZE;
112 saved_buffer = memalign(ARCH_DMA_MINALIGN, saved_size);
117 ret = spi_flash_read(env_flash, saved_offset,
118 saved_size, saved_buffer);
123 sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, sect_size);
125 puts("Erasing SPI flash...");
126 ret = spi_flash_erase(env_flash, env_new_offset,
131 puts("Writing to SPI flash...");
133 ret = spi_flash_write(env_flash, env_new_offset,
134 CONFIG_ENV_SIZE, &env_new);
138 if (sect_size > CONFIG_ENV_SIZE) {
139 ret = spi_flash_write(env_flash, saved_offset,
140 saved_size, saved_buffer);
145 ret = spi_flash_write(env_flash, env_offset + offsetof(env_t, flags),
146 sizeof(env_new.flags), &flag);
152 gd->env_valid = gd->env_valid == ENV_REDUND ? ENV_VALID : ENV_REDUND;
154 printf("Valid environment: %d\n", (int)gd->env_valid);
157 spi_flash_free(env_flash);
166 static int env_sf_load(void)
169 int read1_fail, read2_fail;
170 env_t *tmp_env1, *tmp_env2;
172 tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
174 tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
176 if (!tmp_env1 || !tmp_env2) {
177 env_set_default("malloc() failed", 0);
182 ret = setup_flash_device();
186 read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
187 CONFIG_ENV_SIZE, tmp_env1);
188 read2_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET_REDUND,
189 CONFIG_ENV_SIZE, tmp_env2);
191 ret = env_import_redund((char *)tmp_env1, read1_fail, (char *)tmp_env2,
192 read2_fail, H_EXTERNAL);
194 spi_flash_free(env_flash);
203 static int env_sf_save(void)
205 u32 saved_size = 0, saved_offset = 0, sector;
206 u32 sect_size = CONFIG_ENV_SECT_SIZE;
207 char *saved_buffer = NULL;
211 ret = setup_flash_device();
215 if (IS_ENABLED(CONFIG_ENV_SECT_SIZE_AUTO))
216 sect_size = env_flash->mtd.erasesize;
218 /* Is the sector larger than the env (i.e. embedded) */
219 if (sect_size > CONFIG_ENV_SIZE) {
220 saved_size = sect_size - CONFIG_ENV_SIZE;
221 saved_offset = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE;
222 saved_buffer = malloc(saved_size);
226 ret = spi_flash_read(env_flash, saved_offset,
227 saved_size, saved_buffer);
232 ret = env_export(&env_new);
236 sector = DIV_ROUND_UP(CONFIG_ENV_SIZE, sect_size);
238 puts("Erasing SPI flash...");
239 ret = spi_flash_erase(env_flash, CONFIG_ENV_OFFSET,
244 puts("Writing to SPI flash...");
245 ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET,
246 CONFIG_ENV_SIZE, &env_new);
250 if (sect_size > CONFIG_ENV_SIZE) {
251 ret = spi_flash_write(env_flash, saved_offset,
252 saved_size, saved_buffer);
261 spi_flash_free(env_flash);
270 static int env_sf_load(void)
275 buf = (char *)memalign(ARCH_DMA_MINALIGN, CONFIG_ENV_SIZE);
277 env_set_default("malloc() failed", 0);
281 ret = setup_flash_device();
285 ret = spi_flash_read(env_flash,
286 CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, buf);
288 env_set_default("spi_flash_read() failed", 0);
292 ret = env_import(buf, 1, H_EXTERNAL);
294 gd->env_valid = ENV_VALID;
297 spi_flash_free(env_flash);
306 static int env_sf_erase(void)
311 ret = setup_flash_device();
315 memset(&env, 0, sizeof(env_t));
316 ret = spi_flash_write(env_flash, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE, &env);
320 if (ENV_OFFSET_REDUND != OFFSET_INVALID)
321 ret = spi_flash_write(env_flash, ENV_OFFSET_REDUND, CONFIG_ENV_SIZE, &env);
324 spi_flash_free(env_flash);
330 #if CONFIG_ENV_ADDR != 0x0
331 __weak void *env_sf_get_env_addr(void)
333 return (void *)CONFIG_ENV_ADDR;
337 #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
339 * check if Environment on CONFIG_ENV_ADDR is valid.
341 static int env_sf_init_addr(void)
343 env_t *env_ptr = (env_t *)env_sf_get_env_addr();
345 if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
346 gd->env_addr = (ulong)&(env_ptr->data);
349 gd->env_addr = (ulong)&default_environment[0];
357 #if defined(CONFIG_ENV_SPI_EARLY)
359 * early load environment from SPI flash (before relocation)
360 * and check if it is valid.
362 static int env_sf_init_early(void)
368 env_t *tmp_env2 = NULL;
372 * if malloc is not ready yet, we cannot use
375 if (!gd->malloc_limit)
378 tmp_env1 = (env_t *)memalign(ARCH_DMA_MINALIGN,
380 if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
381 tmp_env2 = (env_t *)memalign(ARCH_DMA_MINALIGN,
384 if (!tmp_env1 || !tmp_env2)
387 ret = setup_flash_device();
391 read1_fail = spi_flash_read(env_flash, CONFIG_ENV_OFFSET,
392 CONFIG_ENV_SIZE, tmp_env1);
394 if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT)) {
395 read2_fail = spi_flash_read(env_flash,
396 CONFIG_ENV_OFFSET_REDUND,
397 CONFIG_ENV_SIZE, tmp_env2);
398 ret = env_check_redund((char *)tmp_env1, read1_fail,
399 (char *)tmp_env2, read2_fail);
404 if (gd->env_valid == ENV_VALID)
405 gd->env_addr = (unsigned long)&tmp_env1->data;
407 gd->env_addr = (unsigned long)&tmp_env2->data;
412 crc1_ok = crc32(0, tmp_env1->data, ENV_SIZE) ==
417 /* if valid -> this is our env */
418 gd->env_valid = ENV_VALID;
419 gd->env_addr = (unsigned long)&tmp_env1->data;
422 spi_flash_free(env_flash);
427 spi_flash_free(env_flash);
430 if (IS_ENABLED(CONFIG_SYS_REDUNDAND_ENVIRONMENT))
433 /* env is not valid. always return 0 */
434 gd->env_valid = ENV_INVALID;
439 static int env_sf_init(void)
441 #if defined(INITENV) && (CONFIG_ENV_ADDR != 0x0)
442 return env_sf_init_addr();
443 #elif defined(CONFIG_ENV_SPI_EARLY)
444 return env_sf_init_early();
447 * return here -ENOENT, so env_init()
448 * can set the init bit and later if no
449 * other Environment storage is defined
450 * can set the default environment
455 U_BOOT_ENV_LOCATION(sf) = {
456 .location = ENVL_SPI_FLASH,
459 .save = ENV_SAVE_PTR(env_sf_save),
460 .erase = ENV_ERASE_PTR(env_sf_erase),