common/cmd_usb_mass_storage.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics
   3  * Lukasz Majewski <l.majewski@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <errno.h>
   9 #include <common.h>
  10 #include <command.h>
  11 #include <g_dnl.h>
  12 #include <part.h>
  13 #include <usb.h>
  14 #include <usb_mass_storage.h>
  15
  16 static int ums_read_sector(struct ums *ums_dev,
  17                            ulong start, lbaint_t blkcnt, void *buf)
  18 {
  19         block_dev_desc_t *block_dev = ums_dev->block_dev;
  20         lbaint_t blkstart = start + ums_dev->start_sector;
  21         int dev_num = block_dev->dev;
  22
  23         return block_dev->block_read(dev_num, blkstart, blkcnt, buf);
  24 }
  25
  26 static int ums_write_sector(struct ums *ums_dev,
  27                             ulong start, lbaint_t blkcnt, const void *buf)
  28 {
  29         block_dev_desc_t *block_dev = ums_dev->block_dev;
  30         lbaint_t blkstart = start + ums_dev->start_sector;
  31         int dev_num = block_dev->dev;
  32
  33         return block_dev->block_write(dev_num, blkstart, blkcnt, buf);
  34 }
  35
  36 static struct ums ums_dev = {
  37         .read_sector = ums_read_sector,
  38         .write_sector = ums_write_sector,
  39         .name = "UMS disk",
  40 };
  41
  42 struct ums *ums_init(const char *devtype, const char *devnum)
  43 {
  44         block_dev_desc_t *block_dev;
  45         int ret;
  46
  47         ret = get_device(devtype, devnum, &block_dev);
  48         if (ret < 0)
  49                 return NULL;
  50
  51         /* f_mass_storage.c assumes SECTOR_SIZE sectors */
  52         if (block_dev->blksz != SECTOR_SIZE)
  53                 return NULL;
  54
  55         ums_dev.block_dev = block_dev;
  56         ums_dev.start_sector = 0;
  57         ums_dev.num_sectors = block_dev->lba;
  58
  59         printf("UMS: disk start sector: %#x, count: %#x\n",
  60                ums_dev.start_sector, ums_dev.num_sectors);
  61
  62         return &ums_dev;
  63 }
  64
  65 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
  66                                int argc, char * const argv[])
  67 {
  68         const char *usb_controller;
  69         const char *devtype;
  70         const char *devnum;
  71         struct ums *ums;
  72         unsigned int controller_index;
  73         int rc;
  74         int cable_ready_timeout __maybe_unused;
  75
  76         if (argc < 3)
  77                 return CMD_RET_USAGE;
  78
  79         usb_controller = argv[1];
  80         if (argc >= 4) {
  81                 devtype = argv[2];
  82                 devnum  = argv[3];
  83         } else {
  84                 devtype = "mmc";
  85                 devnum  = argv[2];
  86         }
  87
  88         ums = ums_init(devtype, devnum);
  89         if (!ums)
  90                 return CMD_RET_FAILURE;
  91
  92         controller_index = (unsigned int)(simple_strtoul(
  93                                 usb_controller, NULL, 0));
  94         if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
  95                 error("Couldn't init USB controller.");
  96                 return CMD_RET_FAILURE;
  97         }
  98
  99         rc = fsg_init(ums);
 100         if (rc) {
 101                 error("fsg_init failed");
 102                 return CMD_RET_FAILURE;
 103         }
 104
 105         rc = g_dnl_register("usb_dnl_ums");
 106         if (rc) {
 107                 error("g_dnl_register failed");
 108                 return CMD_RET_FAILURE;
 109         }
 110
 111         /* Timeout unit: seconds */
 112         cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
 113
 114         if (!g_dnl_board_usb_cable_connected()) {
 115                 /*
 116                  * Won't execute if we don't know whether the cable is
 117                  * connected.
 118                  */
 119                 puts("Please connect USB cable.\n");
 120
 121                 while (!g_dnl_board_usb_cable_connected()) {
 122                         if (ctrlc()) {
 123                                 puts("\rCTRL+C - Operation aborted.\n");
 124                                 goto exit;
 125                         }
 126                         if (!cable_ready_timeout) {
 127                                 puts("\rUSB cable not detected.\n" \
 128                                      "Command exit.\n");
 129                                 goto exit;
 130                         }
 131
 132                         printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
 133                         mdelay(1000);
 134                         cable_ready_timeout--;
 135                 }
 136                 puts("\r\n");
 137         }
 138
 139         while (1) {
 140                 usb_gadget_handle_interrupts();
 141
 142                 rc = fsg_main_thread(NULL);
 143                 if (rc) {
 144                         /* Check I/O error */
 145                         if (rc == -EIO)
 146                                 printf("\rCheck USB cable connection\n");
 147
 148                         /* Check CTRL+C */
 149                         if (rc == -EPIPE)
 150                                 printf("\rCTRL+C - Operation aborted\n");
 151
 152                         goto exit;
 153                 }
 154         }
 155 exit:
 156         g_dnl_unregister();
 157         return CMD_RET_SUCCESS;
 158 }
 159
 160 U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
 161         "Use the UMS [User Mass Storage]",
 162         "ums <USB_controller> [<devtype>] <devnum>  e.g. ums 0 mmc 0\n"
 163         "    devtype defaults to mmc"
 164 );