cmd/usb_mass_storage.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics
   3  * Lukasz Majewski <l.majewski@samsung.com>
   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)
  54 {
  55         char *s, *t, *devnum, *name;
  56         struct blk_desc *block_dev;
  57         int ret;
  58         struct ums *ums_new;
  59
  60         s = strdup(devnums);
  61         if (!s)
  62                 return -1;
  63
  64         t = s;
  65         ums_count = 0;
  66
  67         for (;;) {
  68                 devnum = strsep(&t, ",");
  69                 if (!devnum)
  70                         break;
  71
  72                 ret = blk_get_device_by_str(devtype, devnum, &block_dev);
  73                 if (ret < 0)
  74                         goto cleanup;
  75
  76                 /* f_mass_storage.c assumes SECTOR_SIZE sectors */
  77                 if (block_dev->blksz != SECTOR_SIZE) {
  78                         ret = -1;
  79                         goto cleanup;
  80                 }
  81
  82                 ums_new = realloc(ums, (ums_count + 1) * sizeof(*ums));
  83                 if (!ums_new) {
  84                         ret = -1;
  85                         goto cleanup;
  86                 }
  87                 ums = ums_new;
  88
  89                 ums[ums_count].read_sector = ums_read_sector;
  90                 ums[ums_count].write_sector = ums_write_sector;
  91                 ums[ums_count].start_sector = 0;
  92                 ums[ums_count].num_sectors = block_dev->lba;
  93                 name = malloc(UMS_NAME_LEN);
  94                 if (!name) {
  95                         ret = -1;
  96                         goto cleanup;
  97                 }
  98                 snprintf(name, UMS_NAME_LEN, "UMS disk %d", ums_count);
  99                 ums[ums_count].name = name;
 100                 ums[ums_count].block_dev = *block_dev;
 101
 102                 printf("UMS: LUN %d, dev %d, hwpart %d, sector %#x, count %#x\n",
 103                        ums_count, ums[ums_count].block_dev.devnum,
 104                        ums[ums_count].block_dev.hwpart,
 105                        ums[ums_count].start_sector,
 106                        ums[ums_count].num_sectors);
 107
 108                 ums_count++;
 109         }
 110
 111         if (!ums_count)
 112                 ret = -1;
 113         else
 114                 ret = 0;
 115
 116 cleanup:
 117         free(s);
 118
 119         if (ret < 0)
 120                 ums_fini();
 121
 122         return ret;
 123 }
 124
 125 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
 126                                int argc, char * const argv[])
 127 {
 128         const char *usb_controller;
 129         const char *devtype;
 130         const char *devnum;
 131         unsigned int controller_index;
 132         int rc;
 133         int cable_ready_timeout __maybe_unused;
 134
 135         if (argc < 3)
 136                 return CMD_RET_USAGE;
 137
 138         usb_controller = argv[1];
 139         if (argc >= 4) {
 140                 devtype = argv[2];
 141                 devnum  = argv[3];
 142         } else {
 143                 devtype = "mmc";
 144                 devnum  = argv[2];
 145         }
 146
 147         rc = ums_init(devtype, devnum);
 148         if (rc < 0)
 149                 return CMD_RET_FAILURE;
 150
 151         controller_index = (unsigned int)(simple_strtoul(
 152                                 usb_controller, NULL, 0));
 153         if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
 154                 error("Couldn't init USB controller.");
 155                 rc = CMD_RET_FAILURE;
 156                 goto cleanup_ums_init;
 157         }
 158
 159         rc = fsg_init(ums, ums_count);
 160         if (rc) {
 161                 error("fsg_init failed");
 162                 rc = CMD_RET_FAILURE;
 163                 goto cleanup_board;
 164         }
 165
 166         rc = g_dnl_register("usb_dnl_ums");
 167         if (rc) {
 168                 error("g_dnl_register failed");
 169                 rc = CMD_RET_FAILURE;
 170                 goto cleanup_board;
 171         }
 172
 173         /* Timeout unit: seconds */
 174         cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
 175
 176         if (!g_dnl_board_usb_cable_connected()) {
 177                 /*
 178                  * Won't execute if we don't know whether the cable is
 179                  * connected.
 180                  */
 181                 puts("Please connect USB cable.\n");
 182
 183                 while (!g_dnl_board_usb_cable_connected()) {
 184                         if (ctrlc()) {
 185                                 puts("\rCTRL+C - Operation aborted.\n");
 186                                 rc = CMD_RET_SUCCESS;
 187                                 goto cleanup_register;
 188                         }
 189                         if (!cable_ready_timeout) {
 190                                 puts("\rUSB cable not detected.\n" \
 191                                      "Command exit.\n");
 192                                 rc = CMD_RET_SUCCESS;
 193                                 goto cleanup_register;
 194                         }
 195
 196                         printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
 197                         mdelay(1000);
 198                         cable_ready_timeout--;
 199                 }
 200                 puts("\r\n");
 201         }
 202
 203         while (1) {
 204                 usb_gadget_handle_interrupts(controller_index);
 205
 206                 rc = fsg_main_thread(NULL);
 207                 if (rc) {
 208                         /* Check I/O error */
 209                         if (rc == -EIO)
 210                                 printf("\rCheck USB cable connection\n");
 211
 212                         /* Check CTRL+C */
 213                         if (rc == -EPIPE)
 214                                 printf("\rCTRL+C - Operation aborted\n");
 215
 216                         rc = CMD_RET_SUCCESS;
 217                         goto cleanup_register;
 218                 }
 219         }
 220
 221 cleanup_register:
 222         g_dnl_unregister();
 223 cleanup_board:
 224         board_usb_cleanup(controller_index, USB_INIT_DEVICE);
 225 cleanup_ums_init:
 226         ums_fini();
 227
 228         return rc;
 229 }
 230
 231 U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
 232         "Use the UMS [USB Mass Storage]",
 233         "<USB_controller> [<devtype>] <devnum>  e.g. ums 0 mmc 0\n"
 234         "    devtype defaults to mmc"
 235 );