1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2011 Samsung Electronics
4 * Lukasz Majewski <l.majewski@samsung.com>
5 *
6 * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
7 */
8
9 #include <blk.h>
10 #include <command.h>
11 #include <console.h>
12 #include <errno.h>
13 #include <g_dnl.h>
14 #include <malloc.h>
15 #include <part.h>
16 #include <usb.h>
17 #include <usb_mass_storage.h>
18 #include <watchdog.h>
19 #include <linux/delay.h>
20 #include <linux/printk.h>
21
ums_read_sector(struct ums * ums_dev,ulong start,lbaint_t blkcnt,void * buf)22 static int ums_read_sector(struct ums *ums_dev,
23 ulong start, lbaint_t blkcnt, void *buf)
24 {
25 struct blk_desc *block_dev = &ums_dev->block_dev;
26 lbaint_t blkstart = start + ums_dev->start_sector;
27
28 return blk_dread(block_dev, blkstart, blkcnt, buf);
29 }
30
ums_write_sector(struct ums * ums_dev,ulong start,lbaint_t blkcnt,const void * buf)31 static int ums_write_sector(struct ums *ums_dev,
32 ulong start, lbaint_t blkcnt, const void *buf)
33 {
34 struct blk_desc *block_dev = &ums_dev->block_dev;
35 lbaint_t blkstart = start + ums_dev->start_sector;
36
37 return blk_dwrite(block_dev, blkstart, blkcnt, buf);
38 }
39
40 static struct ums *ums;
41 static int ums_count;
42
ums_fini(void)43 static void ums_fini(void)
44 {
45 int i;
46
47 for (i = 0; i < ums_count; i++)
48 free((void *)ums[i].name);
49 free(ums);
50 ums = NULL;
51 ums_count = 0;
52 }
53
54 #define UMS_NAME_LEN 16
55
ums_init(const char * devtype,const char * devnums_part_str)56 static int ums_init(const char *devtype, const char *devnums_part_str)
57 {
58 char *s, *t, *devnum_part_str, *name;
59 struct blk_desc *block_dev;
60 struct disk_partition info;
61 int partnum;
62 int ret = -1;
63 struct ums *ums_new;
64
65 s = strdup(devnums_part_str);
66 if (!s)
67 return -1;
68
69 t = s;
70 ums_count = 0;
71
72 for (;;) {
73 devnum_part_str = strsep(&t, ",");
74 if (!devnum_part_str)
75 break;
76
77 partnum = part_get_info_by_dev_and_name_or_num(devtype, devnum_part_str,
78 &block_dev, &info, 1);
79
80 if (partnum < 0)
81 goto cleanup;
82
83 /* Check if the argument is in legacy format. If yes,
84 * expose all partitions by setting the partnum = 0
85 * e.g. ums 0 mmc 0
86 */
87 if (!strchr(devnum_part_str, ':'))
88 partnum = 0;
89
90 ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
91 if (!ums_new)
92 goto cleanup;
93 ums = ums_new;
94
95 /* if partnum = 0, expose all partitions */
96 if (partnum == 0) {
97 ums[ums_count].start_sector = 0;
98 ums[ums_count].num_sectors = block_dev->lba;
99 } else {
100 ums[ums_count].start_sector = info.start;
101 ums[ums_count].num_sectors = info.size;
102 }
103
104 ums[ums_count].read_sector = ums_read_sector;
105 ums[ums_count].write_sector = ums_write_sector;
106
107 name = malloc(UMS_NAME_LEN);
108 if (!name)
109 goto cleanup;
110 snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count);
111 ums[ums_count].name = name;
112 ums[ums_count].block_dev = *block_dev;
113
114 printf("UMS: LUN %d, dev %s %d, hwpart %d, sector %#x, count %#x\n",
115 ums_count, devtype, ums[ums_count].block_dev.devnum,
116 ums[ums_count].block_dev.hwpart,
117 ums[ums_count].start_sector,
118 ums[ums_count].num_sectors);
119
120 ums_count++;
121 }
122
123 if (ums_count)
124 ret = 0;
125
126 cleanup:
127 free(s);
128
129 if (ret < 0)
130 ums_fini();
131
132 return ret;
133 }
134
do_usb_mass_storage(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])135 static int do_usb_mass_storage(struct cmd_tbl *cmdtp, int flag,
136 int argc, char *const argv[])
137 {
138 const char *usb_controller;
139 const char *devtype;
140 const char *devnum;
141 unsigned int controller_index;
142 struct udevice *udc;
143 int rc;
144 int cable_ready_timeout __maybe_unused;
145
146 if (argc < 3)
147 return CMD_RET_USAGE;
148
149 usb_controller = argv[1];
150 if (argc >= 4) {
151 devtype = argv[2];
152 devnum = argv[3];
153 } else {
154 devtype = "mmc";
155 devnum = argv[2];
156 }
157
158 rc = ums_init(devtype, devnum);
159 if (rc < 0)
160 return CMD_RET_FAILURE;
161
162 controller_index = (unsigned int)(simple_strtoul(
163 usb_controller, NULL, 0));
164 rc = udc_device_get_by_index(controller_index, &udc);
165 if (rc) {
166 pr_err("Couldn't init USB controller.\n");
167 rc = CMD_RET_FAILURE;
168 goto cleanup_ums_init;
169 }
170
171 rc = fsg_init(ums, ums_count, udc);
172 if (rc) {
173 pr_err("fsg_init failed\n");
174 rc = CMD_RET_FAILURE;
175 goto cleanup_board;
176 }
177
178 rc = g_dnl_register("usb_dnl_ums");
179 if (rc) {
180 pr_err("g_dnl_register failed\n");
181 rc = CMD_RET_FAILURE;
182 goto cleanup_board;
183 }
184
185 /* Timeout unit: seconds */
186 cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
187
188 if (!g_dnl_board_usb_cable_connected()) {
189 /*
190 * Won't execute if we don't know whether the cable is
191 * connected.
192 */
193 puts("Please connect USB cable.\n");
194
195 while (!g_dnl_board_usb_cable_connected()) {
196 if (ctrlc()) {
197 puts("\rCTRL+C - Operation aborted.\n");
198 rc = CMD_RET_SUCCESS;
199 goto cleanup_register;
200 }
201 if (!cable_ready_timeout) {
202 puts("\rUSB cable not detected.\n" \
203 "Command exit.\n");
204 rc = CMD_RET_SUCCESS;
205 goto cleanup_register;
206 }
207
208 printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
209 mdelay(1000);
210 cable_ready_timeout--;
211 }
212 puts("\r\n");
213 }
214
215 while (1) {
216 dm_usb_gadget_handle_interrupts(udc);
217
218 rc = fsg_main_thread(NULL);
219 if (rc) {
220 /* Check I/O error */
221 if (rc == -EIO)
222 printf("\rCheck USB cable connection\n");
223
224 /* Check CTRL+C */
225 if (rc == -EPIPE)
226 printf("\rCTRL+C - Operation aborted\n");
227
228 rc = CMD_RET_SUCCESS;
229 goto cleanup_register;
230 }
231
232 if (IS_ENABLED(CONFIG_CMD_UMS_ABORT_KEYED)) {
233 /* Abort by pressing any key */
234 if (tstc()) {
235 getchar();
236 printf("\rOperation aborted.\n");
237 rc = CMD_RET_SUCCESS;
238 goto cleanup_register;
239 }
240 }
241
242 schedule();
243 }
244
245 cleanup_register:
246 g_dnl_unregister();
247 cleanup_board:
248 udc_device_put(udc);
249 cleanup_ums_init:
250 ums_fini();
251
252 return rc;
253 }
254
255 U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
256 "Use the UMS [USB Mass Storage]",
257 "<USB_controller> [<devtype>] <dev[:part]> e.g. ums 0 mmc 0\n"
258 " devtype defaults to mmc"
259 );
260