usb: gadget: fastboot: Add fastboot erase
[platform/kernel/u-boot.git] / common / fb_mmc.c
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 <fb_mmc.h>
10 #include <part.h>
11 #include <aboot.h>
12 #include <sparse_format.h>
13 #include <mmc.h>
14
15 #ifndef CONFIG_FASTBOOT_GPT_NAME
16 #define CONFIG_FASTBOOT_GPT_NAME GPT_ENTRY_NAME
17 #endif
18
19 /* The 64 defined bytes plus the '\0' */
20 #define RESPONSE_LEN    (64 + 1)
21
22 static char *response_str;
23
24 void fastboot_fail(const char *s)
25 {
26         strncpy(response_str, "FAIL", 4);
27         strncat(response_str, s, RESPONSE_LEN - 4 - 1);
28 }
29
30 void fastboot_okay(const char *s)
31 {
32         strncpy(response_str, "OKAY", 4);
33         strncat(response_str, s, RESPONSE_LEN - 4 - 1);
34 }
35
36 static void write_raw_image(block_dev_desc_t *dev_desc, disk_partition_t *info,
37                 const char *part_name, void *buffer,
38                 unsigned int download_bytes)
39 {
40         lbaint_t blkcnt;
41         lbaint_t blks;
42
43         /* determine number of blocks to write */
44         blkcnt = ((download_bytes + (info->blksz - 1)) & ~(info->blksz - 1));
45         blkcnt = blkcnt / info->blksz;
46
47         if (blkcnt > info->size) {
48                 error("too large for partition: '%s'\n", part_name);
49                 fastboot_fail("too large for partition");
50                 return;
51         }
52
53         puts("Flashing Raw Image\n");
54
55         blks = dev_desc->block_write(dev_desc->dev, info->start, blkcnt,
56                                      buffer);
57         if (blks != blkcnt) {
58                 error("failed writing to device %d\n", dev_desc->dev);
59                 fastboot_fail("failed writing to device");
60                 return;
61         }
62
63         printf("........ wrote " LBAFU " bytes to '%s'\n", blkcnt * info->blksz,
64                part_name);
65         fastboot_okay("");
66 }
67
68 void fb_mmc_flash_write(const char *cmd, void *download_buffer,
69                         unsigned int download_bytes, char *response)
70 {
71         block_dev_desc_t *dev_desc;
72         disk_partition_t info;
73
74         /* initialize the response buffer */
75         response_str = response;
76
77         dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
78         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
79                 error("invalid mmc device\n");
80                 fastboot_fail("invalid mmc device");
81                 return;
82         }
83
84         if (strcmp(cmd, CONFIG_FASTBOOT_GPT_NAME) == 0) {
85                 printf("%s: updating MBR, Primary and Backup GPT(s)\n",
86                        __func__);
87                 if (is_valid_gpt_buf(dev_desc, download_buffer)) {
88                         printf("%s: invalid GPT - refusing to write to flash\n",
89                                __func__);
90                         fastboot_fail("invalid GPT partition");
91                         return;
92                 }
93                 if (write_mbr_and_gpt_partitions(dev_desc, download_buffer)) {
94                         printf("%s: writing GPT partitions failed\n", __func__);
95                         fastboot_fail("writing GPT partitions failed");
96                         return;
97                 }
98                 printf("........ success\n");
99                 fastboot_okay("");
100                 return;
101         } else if (get_partition_info_efi_by_name(dev_desc, cmd, &info)) {
102                 error("cannot find partition: '%s'\n", cmd);
103                 fastboot_fail("cannot find partition");
104                 return;
105         }
106
107         if (is_sparse_image(download_buffer))
108                 write_sparse_image(dev_desc, &info, cmd, download_buffer,
109                                    download_bytes);
110         else
111                 write_raw_image(dev_desc, &info, cmd, download_buffer,
112                                 download_bytes);
113 }
114
115 void fb_mmc_erase(const char *cmd, char *response)
116 {
117         int ret;
118         block_dev_desc_t *dev_desc;
119         disk_partition_t info;
120         lbaint_t blks, blks_start, blks_size, grp_size;
121         struct mmc *mmc = find_mmc_device(CONFIG_FASTBOOT_FLASH_MMC_DEV);
122
123         if (mmc == NULL) {
124                 error("invalid mmc device");
125                 fastboot_fail("invalid mmc device");
126                 return;
127         }
128
129         /* initialize the response buffer */
130         response_str = response;
131
132         dev_desc = get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
133         if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
134                 error("invalid mmc device");
135                 fastboot_fail("invalid mmc device");
136                 return;
137         }
138
139         ret = get_partition_info_efi_by_name(dev_desc, cmd, &info);
140         if (ret) {
141                 error("cannot find partition: '%s'", cmd);
142                 fastboot_fail("cannot find partition");
143                 return;
144         }
145
146         /* Align blocks to erase group size to avoid erasing other partitions */
147         grp_size = mmc->erase_grp_size;
148         blks_start = (info.start + grp_size - 1) & ~(grp_size - 1);
149         if (info.size >= grp_size)
150                 blks_size = (info.size - (blks_start - info.start)) &
151                                 (~(grp_size - 1));
152         else
153                 blks_size = 0;
154
155         printf("Erasing blocks " LBAFU " to " LBAFU " due to alignment\n",
156                blks_start, blks_start + blks_size);
157
158         blks = dev_desc->block_erase(dev_desc->dev, blks_start, blks_size);
159         if (blks != blks_size) {
160                 error("failed erasing from device %d", dev_desc->dev);
161                 fastboot_fail("failed erasing from device");
162                 return;
163         }
164
165         printf("........ erased " LBAFU " bytes from '%s'\n",
166                blks_size * info.blksz, cmd);
167         fastboot_okay("");
168 }