summaryrefslogtreecommitdiff
path: root/cmd/usb_mass_storage.c
blob: cf2f55994e062b16516279a2e2c3f9786a709087 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2011 Samsung Electronics
 * Lukasz Majewski <l.majewski@samsung.com>
 *
 * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
 */

#include <common.h>
#include <blk.h>
#include <command.h>
#include <console.h>
#include <errno.h>
#include <g_dnl.h>
#include <malloc.h>
#include <part.h>
#include <usb.h>
#include <usb_mass_storage.h>
#include <watchdog.h>
#include <linux/delay.h>

static int ums_read_sector(struct ums *ums_dev,
			   ulong start, lbaint_t blkcnt, void *buf)
{
	struct blk_desc *block_dev = &ums_dev->block_dev;
	lbaint_t blkstart = start + ums_dev->start_sector;

	return blk_dread(block_dev, blkstart, blkcnt, buf);
}

static int ums_write_sector(struct ums *ums_dev,
			    ulong start, lbaint_t blkcnt, const void *buf)
{
	struct blk_desc *block_dev = &ums_dev->block_dev;
	lbaint_t blkstart = start + ums_dev->start_sector;

	return blk_dwrite(block_dev, blkstart, blkcnt, buf);
}

static struct ums *ums;
static int ums_count;

static void ums_fini(void)
{
	int i;

	for (i = 0; i < ums_count; i++)
		free((void *)ums[i].name);
	free(ums);
	ums = NULL;
	ums_count = 0;
}

#define UMS_NAME_LEN 16

static int ums_init(const char *devtype, const char *devnums_part_str)
{
	char *s, *t, *devnum_part_str, *name;
	struct blk_desc *block_dev;
	struct disk_partition info;
	int partnum;
	int ret = -1;
	struct ums *ums_new;

	s = strdup(devnums_part_str);
	if (!s)
		return -1;

	t = s;
	ums_count = 0;

	for (;;) {
		devnum_part_str = strsep(&t, ",");
		if (!devnum_part_str)
			break;

		partnum = blk_get_device_part_str(devtype, devnum_part_str,
					&block_dev, &info, 1);

		if (partnum < 0)
			goto cleanup;

		/* Check if the argument is in legacy format. If yes,
		 * expose all partitions by setting the partnum = 0
		 * e.g. ums 0 mmc 0
		 */
		if (!strchr(devnum_part_str, ':'))
			partnum = 0;

		/* f_mass_storage.c assumes SECTOR_SIZE sectors */
		if (block_dev->blksz != SECTOR_SIZE)
			goto cleanup;

		ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
		if (!ums_new)
			goto cleanup;
		ums = ums_new;

		/* if partnum = 0, expose all partitions */
		if (partnum == 0) {
			ums[ums_count].start_sector = 0;
			ums[ums_count].num_sectors = block_dev->lba;
		} else {
			ums[ums_count].start_sector = info.start;
			ums[ums_count].num_sectors = info.size;
		}

		ums[ums_count].read_sector = ums_read_sector;
		ums[ums_count].write_sector = ums_write_sector;

		name = malloc(UMS_NAME_LEN);
		if (!name)
			goto cleanup;
		snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count);
		ums[ums_count].name = name;
		ums[ums_count].block_dev = *block_dev;

		printf("UMS: LUN %d, dev %d, hwpart %d, sector %#x, count %#x\n",
		       ums_count, ums[ums_count].block_dev.devnum,
		       ums[ums_count].block_dev.hwpart,
		       ums[ums_count].start_sector,
		       ums[ums_count].num_sectors);

		ums_count++;
	}

	if (ums_count)
		ret = 0;

cleanup:
	free(s);

	if (ret < 0)
		ums_fini();

	return ret;
}

static int do_usb_mass_storage(struct cmd_tbl *cmdtp, int flag,
			       int argc, char *const argv[])
{
	const char *usb_controller;
	const char *devtype;
	const char *devnum;
	unsigned int controller_index;
	int rc;
	int cable_ready_timeout __maybe_unused;

	if (argc < 3)
		return CMD_RET_USAGE;

	usb_controller = argv[1];
	if (argc >= 4) {
		devtype = argv[2];
		devnum  = argv[3];
	} else {
		devtype = "mmc";
		devnum  = argv[2];
	}

	rc = ums_init(devtype, devnum);
	if (rc < 0)
		return CMD_RET_FAILURE;

	controller_index = (unsigned int)(simple_strtoul(
				usb_controller,	NULL, 0));
	if (usb_gadget_initialize(controller_index)) {
		pr_err("Couldn't init USB controller.\n");
		rc = CMD_RET_FAILURE;
		goto cleanup_ums_init;
	}

	rc = fsg_init(ums, ums_count, controller_index);
	if (rc) {
		pr_err("fsg_init failed\n");
		rc = CMD_RET_FAILURE;
		goto cleanup_board;
	}

	rc = g_dnl_register("usb_dnl_ums");
	if (rc) {
		pr_err("g_dnl_register failed\n");
		rc = CMD_RET_FAILURE;
		goto cleanup_board;
	}

	/* Timeout unit: seconds */
	cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;

	if (!g_dnl_board_usb_cable_connected()) {
		/*
		 * Won't execute if we don't know whether the cable is
		 * connected.
		 */
		puts("Please connect USB cable.\n");

		while (!g_dnl_board_usb_cable_connected()) {
			if (ctrlc()) {
				puts("\rCTRL+C - Operation aborted.\n");
				rc = CMD_RET_SUCCESS;
				goto cleanup_register;
			}
			if (!cable_ready_timeout) {
				puts("\rUSB cable not detected.\n" \
				     "Command exit.\n");
				rc = CMD_RET_SUCCESS;
				goto cleanup_register;
			}

			printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
			mdelay(1000);
			cable_ready_timeout--;
		}
		puts("\r\n");
	}

	while (1) {
		usb_gadget_handle_interrupts(controller_index);

		rc = fsg_main_thread(NULL);
		if (rc) {
			/* Check I/O error */
			if (rc == -EIO)
				printf("\rCheck USB cable connection\n");

			/* Check CTRL+C */
			if (rc == -EPIPE)
				printf("\rCTRL+C - Operation aborted\n");

			rc = CMD_RET_SUCCESS;
			goto cleanup_register;
		}

		WATCHDOG_RESET();
	}

cleanup_register:
	g_dnl_unregister();
cleanup_board:
	usb_gadget_release(controller_index);
cleanup_ums_init:
	ums_fini();

	return rc;
}

U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
	"Use the UMS [USB Mass Storage]",
	"<USB_controller> [<devtype>] <dev[:part]>  e.g. ums 0 mmc 0\n"
	"    devtype defaults to mmc"
);