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         if (argc < 3)
  69                 return CMD_RET_USAGE;
  70
  71         const char *usb_controller = argv[1];
  72         const char *devtype = "mmc";
  73         const char *devnum  = argv[2];
  74
  75         struct ums *ums = ums_init(devtype, devnum);
  76         if (!ums)
  77                 return CMD_RET_FAILURE;
  78
  79         unsigned int controller_index = (unsigned int)(simple_strtoul(
  80                                         usb_controller, NULL, 0));
  81         if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
  82                 error("Couldn't init USB controller.");
  83                 return CMD_RET_FAILURE;
  84         }
  85
  86         int rc = fsg_init(ums);
  87         if (rc) {
  88                 error("fsg_init failed");
  89                 return CMD_RET_FAILURE;
  90         }
  91
  92         rc = g_dnl_register("usb_dnl_ums");
  93         if (rc) {
  94                 error("g_dnl_register failed");
  95                 return CMD_RET_FAILURE;
  96         }
  97
  98         /* Timeout unit: seconds */
  99         int cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
 100
 101         if (!g_dnl_board_usb_cable_connected()) {
 102                 /*
 103                  * Won't execute if we don't know whether the cable is
 104                  * connected.
 105                  */
 106                 puts("Please connect USB cable.\n");
 107
 108                 while (!g_dnl_board_usb_cable_connected()) {
 109                         if (ctrlc()) {
 110                                 puts("\rCTRL+C - Operation aborted.\n");
 111                                 goto exit;
 112                         }
 113                         if (!cable_ready_timeout) {
 114                                 puts("\rUSB cable not detected.\n" \
 115                                      "Command exit.\n");
 116                                 goto exit;
 117                         }
 118
 119                         printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
 120                         mdelay(1000);
 121                         cable_ready_timeout--;
 122                 }
 123                 puts("\r\n");
 124         }
 125
 126         while (1) {
 127                 usb_gadget_handle_interrupts();
 128
 129                 rc = fsg_main_thread(NULL);
 130                 if (rc) {
 131                         /* Check I/O error */
 132                         if (rc == -EIO)
 133                                 printf("\rCheck USB cable connection\n");
 134
 135                         /* Check CTRL+C */
 136                         if (rc == -EPIPE)
 137                                 printf("\rCTRL+C - Operation aborted\n");
 138
 139                         goto exit;
 140                 }
 141         }
 142 exit:
 143         g_dnl_unregister();
 144         return CMD_RET_SUCCESS;
 145 }
 146
 147 U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
 148         "Use the UMS [User Mass Storage]",
 149         "ums <USB_controller> <mmc_dev>  e.g. ums 0 0"
 150 );