cmd/usb_mass_storage.c

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