xref: /rk3399_rockchip-uboot/common/fb_mmc.c (revision ea3310e8aafad1da72d9a5e60568d725cbdefdbd)
1 /*
2  * Copyright 2014 Broadcom Corporation.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <config.h>
8 #include <common.h>
9 #include <blk.h>
10 #include <fastboot.h>
11 #include <fb_mmc.h>
12 #include <image-sparse.h>
13 #include <part.h>
14 #include <mmc.h>
15 #include <div64.h>
16 
17 /*
18  * FIXME: Ensure we always set these names via Kconfig once xxx_PARTITION is
19  * migrated
20  */
21 #ifndef CONFIG_FASTBOOT_GPT_NAME
22 #define CONFIG_FASTBOOT_GPT_NAME "gpt"
23 #endif
24 
25 
26 #ifndef CONFIG_FASTBOOT_MBR_NAME
27 #define CONFIG_FASTBOOT_MBR_NAME "mbr"
28 #endif
29 
30 struct fb_mmc_sparse {
31 	struct blk_desc	*dev_desc;
32 };
33 
34 static int part_get_info_by_name_or_alias(struct blk_desc *dev_desc,
35 		const char *name, disk_partition_t *info)
36 {
37 	int ret;
38 
39 	ret = part_get_info_by_name(dev_desc, name, info);
40 	if (ret) {
41 		/* strlen("fastboot_partition_alias_") + 32(part_name) + 1 */
42 		char env_alias_name[25 + 32 + 1];
43 		char *aliased_part_name;
44 
45 		/* check for alias */
46 		strcpy(env_alias_name, "fastboot_partition_alias_");
47 		strncat(env_alias_name, name, 32);
48 		aliased_part_name = getenv(env_alias_name);
49 		if (aliased_part_name != NULL)
50 			ret = part_get_info_by_name(dev_desc,
51 					aliased_part_name, info);
52 	}
53 	return ret;
54 }
55 
56 static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info,
57 		lbaint_t blk, lbaint_t blkcnt, const void *buffer)
58 {
59 	struct fb_mmc_sparse *sparse = info->priv;
60 	struct blk_desc *dev_desc = sparse->dev_desc;
61 
62 	return blk_dwrite(dev_desc, blk, blkcnt, buffer);
63 }
64 
65 static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info,
66 		lbaint_t blk, lbaint_t blkcnt)
67 {
68 	return blkcnt;
69 }
70 
71 static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info,
72 		const char *part_name, void *buffer,
73 		unsigned int download_bytes)
74 {
75 	lbaint_t blkcnt;
76 	lbaint_t blks;
77 
78 	/* determine number of blocks to write */
79 	blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
80 	blkcnt = lldiv(blkcnt, info->blksz);
81 
82 	if (blkcnt > info->size) {
83 		error("too large for partition: '%s'\n", part_name);
84 		fastboot_fail("too large for partition");
85 		return;
86 	}
87 
88 	puts("Flashing Raw Image\n");
89 
90 	blks = blk_dwrite(dev_desc, info->start, blkcnt, buffer);
91 	if (blks != blkcnt) {
92 		error("failed writing to device %d\n", dev_desc->devnum);
93 		fastboot_fail("failed writing to device");
94 		return;
95 	}
96 
97 	printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
98 	       part_name);
99 	fastboot_okay("");
100 }
101 
102 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
103 			unsigned int download_bytes)
104 {
105 	struct blk_desc *dev_desc;
106 	disk_partition_t info;
107 
108 	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
109 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
110 		error("invalid mmc device\n");
111 		fastboot_fail("invalid mmc device");
112 		return;
113 	}
114 
115 #if CONFIG_IS_ENABLED(EFI_PARTITION)
116 	if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
117 		printf("%s: updating MBR, Primary and Backup GPT(s)\n",
118 		       __func__);
119 		if (is_valid_gpt_buf(dev_desc, download_buffer)) {
120 			printf("%s: invalid GPT - refusing to write to flash\n",
121 			       __func__);
122 			fastboot_fail("invalid GPT partition");
123 			return;
124 		}
125 		if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
126 			printf("%s: writing GPT partitions failed\n", __func__);
127 			fastboot_fail("writing GPT partitions failed");
128 			return;
129 		}
130 		printf("........ success\n");
131 		fastboot_okay("");
132 		return;
133 	}
134 #endif
135 
136 #if CONFIG_IS_ENABLED(DOS_PARTITION)
137 	if (strcmp(cmd, CONFIG_FASTBOOT_MBR_NAME) == 0) {
138 		printf("%s: updating MBR\n", __func__);
139 		if (is_valid_dos_buf(download_buffer)) {
140 			printf("%s: invalid MBR - refusing to write to flash\n",
141 			       __func__);
142 			fastboot_fail("invalid MBR partition");
143 			return;
144 		}
145 		if (write_mbr_partition(dev_desc, download_buffer)) {
146 			printf("%s: writing MBR partition failed\n", __func__);
147 			fastboot_fail("writing MBR partition failed");
148 			return;
149 		}
150 		printf("........ success\n");
151 		fastboot_okay("");
152 		return;
153 	}
154 #endif
155 
156 	if (part_get_info_by_name_or_alias(dev_desc, cmd, &info)) {
157 		error("cannot find partition: '%s'\n", cmd);
158 		fastboot_fail("cannot find partition");
159 		return;
160 	}
161 
162 	if (is_sparse_image(download_buffer)) {
163 		struct fb_mmc_sparse sparse_priv;
164 		struct sparse_storage sparse;
165 
166 		sparse_priv.dev_desc = dev_desc;
167 
168 		sparse.blksz = info.blksz;
169 		sparse.start = info.start;
170 		sparse.size = info.size;
171 		sparse.write = fb_mmc_sparse_write;
172 		sparse.reserve = fb_mmc_sparse_reserve;
173 
174 		printf("Flashing sparse image at offset " LBAFU "\n",
175 		       sparse.start);
176 
177 		sparse.priv = &sparse_priv;
178 		write_sparse_image(&sparse, cmd, download_buffer,
179 				   download_bytes);
180 	} else {
181 		write_raw_image(dev_desc, &info, cmd, download_buffer,
182 				download_bytes);
183 	}
184 }
185 
186 void fb_mmc_erase(const char *cmd)
187 {
188 	int ret;
189 	struct blk_desc *dev_desc;
190 	disk_partition_t info;
191 	lbaint_t blks, blks_start, blks_size, grp_size;
192 	struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
193 
194 	if (mmc == NULL) {
195 		error("invalid mmc device");
196 		fastboot_fail("invalid mmc device");
197 		return;
198 	}
199 
200 	dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
201 	if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
202 		error("invalid mmc device");
203 		fastboot_fail("invalid mmc device");
204 		return;
205 	}
206 
207 	ret = part_get_info_by_name_or_alias(dev_desc, cmd, &info);
208 	if (ret) {
209 		error("cannot find partition: '%s'", cmd);
210 		fastboot_fail("cannot find partition");
211 		return;
212 	}
213 
214 	/* Align blocks to erase group size to avoid erasing other partitions */
215 	grp_size = mmc->erase_grp_size;
216 	blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
217 	if (info.size >= grp_size)
218 		blks_size = (info.size - (blks_start - info.start)) &
219 				(~(grp_size - 1));
220 	else
221 		blks_size = 0;
222 
223 	printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
224 	       blks_start, blks_start + blks_size);
225 
226 	blks = blk_derase(dev_desc, blks_start, blks_size);
227 	if (blks != blks_size) {
228 		error("failed erasing from device %d", dev_desc->devnum);
229 		fastboot_fail("failed erasing from device");
230 		return;
231 	}
232 
233 	printf("........ erased " LBAFU " bytes from '%s'\n",
234 	       blks_size * info.blksz, cmd);
235 	fastboot_okay("");
236 }
237