| Patrick Delaunay | daa5f01 | 2020-03-18 09:22:44 +0100 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause |
| 2 | /* |
| 3 | * Copyright (C) 2020, STMicroelectronics - All Rights Reserved |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <dm.h> |
| 8 | #include <env.h> |
| 9 | #include <env_internal.h> |
| 10 | #include <mtd.h> |
| 11 | #include <mtd_node.h> |
| 12 | |
| 13 | #define MTDPARTS_LEN 256 |
| 14 | #define MTDIDS_LEN 128 |
| 15 | |
| 16 | /* |
| 17 | * Get a global data pointer |
| 18 | */ |
| 19 | DECLARE_GLOBAL_DATA_PTR; |
| 20 | |
| 21 | /** |
| 22 | * The mtdparts_nand0 and mtdparts_nor0 variable tends to be long. |
| 23 | * If we need to access it before the env is relocated, then we need |
| 24 | * to use our own stack buffer. gd->env_buf will be too small. |
| 25 | * |
| 26 | * @param buf temporary buffer pointer MTDPARTS_LEN long |
| 27 | * @return mtdparts variable string, NULL if not found |
| 28 | */ |
| 29 | static const char *env_get_mtdparts(const char *str, char *buf) |
| 30 | { |
| 31 | if (gd->flags & GD_FLG_ENV_READY) |
| 32 | return env_get(str); |
| 33 | if (env_get_f(str, buf, MTDPARTS_LEN) != -1) |
| 34 | return buf; |
| 35 | |
| 36 | return NULL; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * update the variables "mtdids" and "mtdparts" with content of mtdparts_<dev> |
| 41 | */ |
| 42 | static void board_get_mtdparts(const char *dev, |
| 43 | char *mtdids, |
| 44 | char *mtdparts) |
| 45 | { |
| 46 | char env_name[32] = "mtdparts_"; |
| 47 | char tmp_mtdparts[MTDPARTS_LEN]; |
| 48 | const char *tmp; |
| 49 | |
| 50 | /* name of env variable to read = mtdparts_<dev> */ |
| 51 | strcat(env_name, dev); |
| 52 | tmp = env_get_mtdparts(env_name, tmp_mtdparts); |
| 53 | if (tmp) { |
| 54 | /* mtdids: "<dev>=<dev>, ...." */ |
| 55 | if (mtdids[0] != '\0') |
| 56 | strcat(mtdids, ","); |
| 57 | strcat(mtdids, dev); |
| 58 | strcat(mtdids, "="); |
| 59 | strcat(mtdids, dev); |
| 60 | |
| 61 | /* mtdparts: "mtdparts=<dev>:<mtdparts_<dev>>;..." */ |
| 62 | if (mtdparts[0] != '\0') |
| 63 | strncat(mtdparts, ";", MTDPARTS_LEN); |
| 64 | else |
| 65 | strcat(mtdparts, "mtdparts="); |
| 66 | strncat(mtdparts, dev, MTDPARTS_LEN); |
| 67 | strncat(mtdparts, ":", MTDPARTS_LEN); |
| 68 | strncat(mtdparts, tmp, MTDPARTS_LEN); |
| 69 | } |
| 70 | } |
| 71 | |
| 72 | void board_mtdparts_default(const char **mtdids, const char **mtdparts) |
| 73 | { |
| 74 | struct mtd_info *mtd; |
| 75 | struct udevice *dev; |
| 76 | static char parts[3 * MTDPARTS_LEN + 1]; |
| 77 | static char ids[MTDIDS_LEN + 1]; |
| 78 | static bool mtd_initialized; |
| 79 | |
| 80 | if (mtd_initialized) { |
| 81 | *mtdids = ids; |
| 82 | *mtdparts = parts; |
| 83 | return; |
| 84 | } |
| 85 | |
| 86 | memset(parts, 0, sizeof(parts)); |
| 87 | memset(ids, 0, sizeof(ids)); |
| 88 | |
| 89 | /* probe all MTD devices */ |
| 90 | for (uclass_first_device(UCLASS_MTD, &dev); |
| 91 | dev; |
| 92 | uclass_next_device(&dev)) { |
| 93 | pr_debug("mtd device = %s\n", dev->name); |
| 94 | } |
| 95 | |
| 96 | mtd = get_mtd_device_nm("nand0"); |
| 97 | if (!IS_ERR_OR_NULL(mtd)) { |
| 98 | board_get_mtdparts("nand0", ids, parts); |
| 99 | put_mtd_device(mtd); |
| 100 | } |
| 101 | |
| 102 | mtd = get_mtd_device_nm("spi-nand0"); |
| 103 | if (!IS_ERR_OR_NULL(mtd)) { |
| 104 | board_get_mtdparts("spi-nand0", ids, parts); |
| 105 | put_mtd_device(mtd); |
| 106 | } |
| 107 | |
| 108 | if (!uclass_get_device(UCLASS_SPI_FLASH, 0, &dev)) |
| 109 | board_get_mtdparts("nor0", ids, parts); |
| 110 | |
| 111 | mtd_initialized = true; |
| 112 | *mtdids = ids; |
| 113 | *mtdparts = parts; |
| 114 | debug("%s:mtdids=%s & mtdparts=%s\n", __func__, ids, parts); |
| 115 | } |