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