1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2020 Linaro Limited
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <mtd.h>
9
10 #include <linux/string.h>
11
12 #define MTDPARTS_LEN 256
13 #define MTDIDS_LEN 128
14
board_get_mtdparts(const char * dev,const char * partition,char * mtdids,char * mtdparts)15 static void board_get_mtdparts(const char *dev, const char *partition,
16 char *mtdids, char *mtdparts)
17 {
18 /* mtdids: "<dev>=<dev>, ...." */
19 if (mtdids[0] != '\0')
20 strcat(mtdids, ",");
21 strcat(mtdids, dev);
22 strcat(mtdids, "=");
23 strcat(mtdids, dev);
24
25 /* mtdparts: "mtdparts=<dev>:<mtdparts_<dev>>;..." */
26 if (mtdparts[0] != '\0')
27 strncat(mtdparts, ";", MTDPARTS_LEN);
28 else
29 strcat(mtdparts, "mtdparts=");
30
31 strncat(mtdparts, dev, MTDPARTS_LEN);
32 strncat(mtdparts, ":", MTDPARTS_LEN);
33 strncat(mtdparts, partition, MTDPARTS_LEN);
34 }
35
board_mtdparts_default(const char ** mtdids,const char ** mtdparts)36 void board_mtdparts_default(const char **mtdids, const char **mtdparts)
37 {
38 struct mtd_info *mtd;
39 struct udevice *dev;
40 const char *mtd_partition;
41 static char parts[3 * MTDPARTS_LEN + 1];
42 static char ids[MTDIDS_LEN + 1];
43 static bool mtd_initialized;
44
45 if (mtd_initialized) {
46 *mtdids = ids;
47 *mtdparts = parts;
48 return;
49 }
50
51 memset(parts, 0, sizeof(parts));
52 memset(ids, 0, sizeof(ids));
53
54 /* Currently mtdparts is needed on Qemu ARM64 for capsule updates */
55 if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_MANAGEMENT) &&
56 IS_ENABLED(CONFIG_TARGET_QEMU_ARM_64BIT)) {
57 /* probe all MTD devices */
58 for (uclass_first_device(UCLASS_MTD, &dev); dev;
59 uclass_next_device(&dev)) {
60 debug("mtd device = %s\n", dev->name);
61 }
62
63 mtd = get_mtd_device_nm("nor0");
64 if (!IS_ERR_OR_NULL(mtd)) {
65 mtd_partition = CONFIG_MTDPARTS_NOR0;
66 board_get_mtdparts("nor0", mtd_partition, ids, parts);
67 put_mtd_device(mtd);
68 }
69
70 mtd = get_mtd_device_nm("nor1");
71 if (!IS_ERR_OR_NULL(mtd)) {
72 mtd_partition = CONFIG_MTDPARTS_NOR1;
73 board_get_mtdparts("nor1", mtd_partition, ids, parts);
74 put_mtd_device(mtd);
75 }
76 }
77
78 mtd_initialized = true;
79 *mtdids = ids;
80 *mtdparts = parts;
81 debug("%s:mtdids=%s & mtdparts=%s\n", __func__, ids, parts);
82 }
83