1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2014 Broadcom Corporation.
4 * Copyright 2015 Free Electrons.
5 */
6
7 #include <config.h>
8 #include <common.h>
9
10 #include <fastboot.h>
11 #include <image-sparse.h>
12
13 #include <linux/mtd/mtd.h>
14 #include <jffs2/jffs2.h>
15 #include <nand.h>
16
17 struct fb_nand_sparse {
18 struct mtd_info *mtd;
19 struct part_info *part;
20 };
21
board_fastboot_erase_partition_setup(char * name)22 __weak int board_fastboot_erase_partition_setup(char *name)
23 {
24 return 0;
25 }
26
board_fastboot_write_partition_setup(char * name)27 __weak int board_fastboot_write_partition_setup(char *name)
28 {
29 return 0;
30 }
31
fb_nand_lookup(const char * partname,struct mtd_info ** mtd,struct part_info ** part,char * response)32 static int fb_nand_lookup(const char *partname,
33 struct mtd_info **mtd,
34 struct part_info **part,
35 char *response)
36 {
37 struct mtd_device *dev;
38 int ret;
39 u8 pnum;
40
41 ret = mtdparts_init();
42 if (ret) {
43 pr_err("Cannot initialize MTD partitions\n");
44 fastboot_fail("cannot init mtdparts", response);
45 return ret;
46 }
47
48 ret = find_dev_and_part(partname, &dev, &pnum, part);
49 if (ret) {
50 pr_err("cannot find partition: '%s'", partname);
51 fastboot_fail("cannot find partition", response);
52 return ret;
53 }
54
55 if (dev->id->type != MTD_DEV_TYPE_NAND) {
56 pr_err("partition '%s' is not stored on a NAND device",
57 partname);
58 fastboot_fail("not a NAND device", response);
59 return -EINVAL;
60 }
61
62 *mtd = get_nand_dev_by_index(dev->id->num);
63
64 return 0;
65 }
66
_fb_nand_erase(struct mtd_info * mtd,struct part_info * part)67 static int _fb_nand_erase(struct mtd_info *mtd, struct part_info *part)
68 {
69 nand_erase_options_t opts;
70 int ret;
71
72 memset(&opts, 0, sizeof(opts));
73 opts.offset = part->offset;
74 opts.length = part->size;
75 opts.quiet = 1;
76
77 printf("Erasing blocks 0x%llx to 0x%llx\n",
78 part->offset, part->offset + part->size);
79
80 ret = nand_erase_opts(mtd, &opts);
81 if (ret)
82 return ret;
83
84 printf("........ erased 0x%llx bytes from '%s'\n",
85 part->size, part->name);
86
87 return 0;
88 }
89
_fb_nand_write(struct mtd_info * mtd,struct part_info * part,void * buffer,u32 offset,size_t length,size_t * written)90 static int _fb_nand_write(struct mtd_info *mtd, struct part_info *part,
91 void *buffer, u32 offset,
92 size_t length, size_t *written)
93 {
94 int flags = WITH_WR_VERIFY;
95
96 #ifdef CONFIG_FASTBOOT_FLASH_NAND_TRIMFFS
97 flags |= WITH_DROP_FFS;
98 #endif
99
100 return nand_write_skip_bad(mtd, offset, &length, written,
101 part->size - (offset - part->offset),
102 buffer, flags);
103 }
104
fb_nand_sparse_write(struct sparse_storage * info,lbaint_t blk,lbaint_t blkcnt,const void * buffer)105 static lbaint_t fb_nand_sparse_write(struct sparse_storage *info,
106 lbaint_t blk, lbaint_t blkcnt, const void *buffer)
107 {
108 struct fb_nand_sparse *sparse = info->priv;
109 size_t written;
110 int ret;
111
112 ret = _fb_nand_write(sparse->mtd, sparse->part, (void *)buffer,
113 blk * info->blksz,
114 blkcnt * info->blksz, &written);
115 if (ret < 0) {
116 printf("Failed to write sparse chunk\n");
117 return ret;
118 }
119
120 /* TODO - verify that the value "written" includes the "bad-blocks" ... */
121
122 /*
123 * the return value must be 'blkcnt' ("good-blocks") plus the
124 * number of "bad-blocks" encountered within this space...
125 */
126 return written / info->blksz;
127 }
128
fb_nand_sparse_reserve(struct sparse_storage * info,lbaint_t blk,lbaint_t blkcnt)129 static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info,
130 lbaint_t blk, lbaint_t blkcnt)
131 {
132 int bad_blocks = 0;
133
134 /*
135 * TODO - implement a function to determine the total number
136 * of blocks which must be used in order to reserve the specified
137 * number ("blkcnt") of "good-blocks", starting at "blk"...
138 * ( possibly something like the "check_skip_len()" function )
139 */
140
141 /*
142 * the return value must be 'blkcnt' ("good-blocks") plus the
143 * number of "bad-blocks" encountered within this space...
144 */
145 return blkcnt + bad_blocks;
146 }
147
148 /**
149 * fastboot_nand_get_part_info() - Lookup NAND partion by name
150 *
151 * @part_name: Named device to lookup
152 * @part_info: Pointer to returned part_info pointer
153 * @response: Pointer to fastboot response buffer
154 */
fastboot_nand_get_part_info(char * part_name,struct part_info ** part_info,char * response)155 int fastboot_nand_get_part_info(char *part_name, struct part_info **part_info,
156 char *response)
157 {
158 struct mtd_info *mtd = NULL;
159
160 return fb_nand_lookup(part_name, &mtd, part_info, response);
161 }
162
163 /**
164 * fastboot_nand_flash_write() - Write image to NAND for fastboot
165 *
166 * @cmd: Named device to write image to
167 * @download_buffer: Pointer to image data
168 * @download_bytes: Size of image data
169 * @response: Pointer to fastboot response buffer
170 */
fastboot_nand_flash_write(const char * cmd,void * download_buffer,u32 download_bytes,char * response)171 void fastboot_nand_flash_write(const char *cmd, void *download_buffer,
172 u32 download_bytes, char *response)
173 {
174 struct part_info *part;
175 struct mtd_info *mtd = NULL;
176 int ret;
177
178 ret = fb_nand_lookup(cmd, &mtd, &part, response);
179 if (ret) {
180 pr_err("invalid NAND device");
181 fastboot_fail("invalid NAND device", response);
182 return;
183 }
184
185 ret = board_fastboot_write_partition_setup(part->name);
186 if (ret)
187 return;
188
189 if (is_sparse_image(download_buffer)) {
190 struct fb_nand_sparse sparse_priv;
191 struct sparse_storage sparse;
192
193 sparse_priv.mtd = mtd;
194 sparse_priv.part = part;
195
196 sparse.blksz = mtd->writesize;
197 sparse.start = part->offset / sparse.blksz;
198 sparse.size = part->size / sparse.blksz;
199 sparse.write = fb_nand_sparse_write;
200 sparse.reserve = fb_nand_sparse_reserve;
201 sparse.mssg = fastboot_fail;
202
203 printf("Flashing sparse image at offset " LBAFU "\n",
204 sparse.start);
205
206 sparse.priv = &sparse_priv;
207 ret = write_sparse_image(&sparse, cmd, download_buffer,
208 response);
209 if (!ret)
210 fastboot_okay(NULL, response);
211 } else {
212 printf("Flashing raw image at offset 0x%llx\n",
213 part->offset);
214
215 ret = _fb_nand_write(mtd, part, download_buffer, part->offset,
216 download_bytes, NULL);
217
218 printf("........ wrote %u bytes to '%s'\n",
219 download_bytes, part->name);
220 }
221
222 if (ret) {
223 fastboot_fail("error writing the image", response);
224 return;
225 }
226
227 fastboot_okay(NULL, response);
228 }
229
230 /**
231 * fastboot_nand_flash_erase() - Erase NAND for fastboot
232 *
233 * @cmd: Named device to erase
234 * @response: Pointer to fastboot response buffer
235 */
fastboot_nand_erase(const char * cmd,char * response)236 void fastboot_nand_erase(const char *cmd, char *response)
237 {
238 struct part_info *part;
239 struct mtd_info *mtd = NULL;
240 int ret;
241
242 ret = fb_nand_lookup(cmd, &mtd, &part, response);
243 if (ret) {
244 pr_err("invalid NAND device");
245 fastboot_fail("invalid NAND device", response);
246 return;
247 }
248
249 ret = board_fastboot_erase_partition_setup(part->name);
250 if (ret)
251 return;
252
253 ret = _fb_nand_erase(mtd, part);
254 if (ret) {
255 pr_err("failed erasing from device %s", mtd->name);
256 fastboot_fail("failed erasing from device", response);
257 return;
258 }
259
260 fastboot_okay(NULL, response);
261 }
262