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 <console.h>
  12 #include <g_dnl.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(const char *devtype, const char *devnum)
  44 {
  45         block_dev_desc_t *block_dev;
  46         int ret;
  47
  48         ret = get_device(devtype, devnum, &block_dev);
  49         if (ret < 0)
  50                 return NULL;
  51
  52         /* f_mass_storage.c assumes SECTOR_SIZE sectors */
  53         if (block_dev->blksz != SECTOR_SIZE)
  54                 return NULL;
  55
  56         ums_dev.block_dev = block_dev;
  57         ums_dev.start_sector = 0;
  58         ums_dev.num_sectors = block_dev->lba;
  59
  60         printf("UMS: disk start sector: %#x, count: %#x\n",
  61                ums_dev.start_sector, ums_dev.num_sectors);
  62
  63         return &ums_dev;
  64 }
  65
  66 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
  67                                int argc, char * const argv[])
  68 {
  69         const char *usb_controller;
  70         const char *devtype;
  71         const char *devnum;
  72         struct ums *ums;
  73         unsigned int controller_index;
  74         int rc;
  75         int cable_ready_timeout __maybe_unused;
  76
  77         if (argc < 3)
  78                 return CMD_RET_USAGE;
  79
  80         usb_controller = argv[1];
  81         if (argc >= 4) {
  82                 devtype = argv[2];
  83                 devnum  = argv[3];
  84         } else {
  85                 devtype = "mmc";
  86                 devnum  = argv[2];
  87         }
  88
  89         ums = ums_init(devtype, devnum);
  90         if (!ums)
  91                 return CMD_RET_FAILURE;
  92
  93         controller_index = (unsigned int)(simple_strtoul(
  94                                 usb_controller, NULL, 0));
  95         if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
  96                 error("Couldn't init USB controller.");
  97                 return CMD_RET_FAILURE;
  98         }
  99
 100         rc = fsg_init(ums);
 101         if (rc) {
 102                 error("fsg_init failed");
 103                 return CMD_RET_FAILURE;
 104         }
 105
 106         rc = g_dnl_register("usb_dnl_ums");
 107         if (rc) {
 108                 error("g_dnl_register failed");
 109                 return CMD_RET_FAILURE;
 110         }
 111
 112         /* Timeout unit: seconds */
 113         cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
 114
 115         if (!g_dnl_board_usb_cable_connected()) {
 116                 /*
 117                  * Won't execute if we don't know whether the cable is
 118                  * connected.
 119                  */
 120                 puts("Please connect USB cable.\n");
 121
 122                 while (!g_dnl_board_usb_cable_connected()) {
 123                         if (ctrlc()) {
 124                                 puts("\rCTRL+C - Operation aborted.\n");
 125                                 goto exit;
 126                         }
 127                         if (!cable_ready_timeout) {
 128                                 puts("\rUSB cable not detected.\n" \
 129                                      "Command exit.\n");
 130                                 goto exit;
 131                         }
 132
 133                         printf("\rAuto exit in: %.2d s.", cable_ready_timeout);
 134                         mdelay(1000);
 135                         cable_ready_timeout--;
 136                 }
 137                 puts("\r\n");
 138         }
 139
 140         while (1) {
 141                 usb_gadget_handle_interrupts(controller_index);
 142
 143                 rc = fsg_main_thread(NULL);
 144                 if (rc) {
 145                         /* Check I/O error */
 146                         if (rc == -EIO)
 147                                 printf("\rCheck USB cable connection\n");
 148
 149                         /* Check CTRL+C */
 150                         if (rc == -EPIPE)
 151                                 printf("\rCTRL+C - Operation aborted\n");
 152
 153                         goto exit;
 154                 }
 155         }
 156 exit:
 157         g_dnl_unregister();
 158         board_usb_cleanup(controller_index, USB_INIT_DEVICE);
 159         return CMD_RET_SUCCESS;
 160 }
 161
 162 U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
 163         "Use the UMS [USB Mass Storage]",
 164         "<USB_controller> [<devtype>] <devnum>  e.g. ums 0 mmc 0\n"
 165         "    devtype defaults to mmc"
 166 );