1 files changed, 79 insertions, 12 deletions

diff --git a/common/cmd_usb_mass_storage.c b/common/cmd_usb_mass_storage.c
index d8d9efd4f..2c879ea08 100644
--- a/common/cmd_usb_mass_storage.c
+++ b/common/cmd_usb_mass_storage.c
@@ -9,41 +9,107 @@
 #include <common.h>
 #include <command.h>
 #include <g_dnl.h>
+#include <part.h>
 #include <usb.h>
 #include <usb_mass_storage.h>
 
+static int ums_read_sector(struct ums *ums_dev,
+			   ulong start, lbaint_t blkcnt, void *buf)
+{
+	block_dev_desc_t *block_dev = ums_dev->block_dev;
+	lbaint_t blkstart = start + ums_dev->start_sector;
+	int dev_num = block_dev->dev;
+
+	return block_dev->block_read(dev_num, blkstart, blkcnt, buf);
+}
+
+static int ums_write_sector(struct ums *ums_dev,
+			    ulong start, lbaint_t blkcnt, const void *buf)
+{
+	block_dev_desc_t *block_dev = ums_dev->block_dev;
+	lbaint_t blkstart = start + ums_dev->start_sector;
+	int dev_num = block_dev->dev;
+
+	return block_dev->block_write(dev_num, blkstart, blkcnt, buf);
+}
+
+static struct ums ums_dev = {
+	.read_sector = ums_read_sector,
+	.write_sector = ums_write_sector,
+	.name = "UMS disk",
+};
+
+struct ums *ums_init(const char *devtype, const char *devnum)
+{
+	block_dev_desc_t *block_dev;
+	int ret;
+
+	ret = get_device(devtype, devnum, &block_dev);
+	if (ret < 0)
+		return NULL;
+
+	/* f_mass_storage.c assumes SECTOR_SIZE sectors */
+	if (block_dev->blksz != SECTOR_SIZE)
+		return NULL;
+
+	ums_dev.block_dev = block_dev;
+	ums_dev.start_sector = 0;
+	ums_dev.num_sectors = block_dev->lba;
+
+	printf("UMS: disk start sector: %#x, count: %#x\n",
+	       ums_dev.start_sector, ums_dev.num_sectors);
+
+	return &ums_dev;
+}
+
 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
 			       int argc, char * const argv[])
 {
+	const char *usb_controller;
+	const char *devtype;
+	const char *devnum;
+	struct ums *ums;
+	unsigned int controller_index;
+	int rc;
+	int cable_ready_timeout __maybe_unused;
+
 	if (argc < 3)
 		return CMD_RET_USAGE;
 
-	const char *usb_controller = argv[1];
-	const char *mmc_devstring  = argv[2];
-
-	unsigned int dev_num = simple_strtoul(mmc_devstring, NULL, 0);
+	usb_controller = argv[1];
+	if (argc >= 4) {
+		devtype = argv[2];
+		devnum  = argv[3];
+	} else {
+		devtype = "mmc";
+		devnum  = argv[2];
+	}
 
-	struct ums *ums = ums_init(dev_num);
+	ums = ums_init(devtype, devnum);
 	if (!ums)
 		return CMD_RET_FAILURE;
 
-	unsigned int controller_index = (unsigned int)(simple_strtoul(
-					usb_controller,	NULL, 0));
+	controller_index = (unsigned int)(simple_strtoul(
+				usb_controller,	NULL, 0));
 	if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
 		error("Couldn't init USB controller.");
 		return CMD_RET_FAILURE;
 	}
 
-	int rc = fsg_init(ums);
+	rc = fsg_init(ums);
 	if (rc) {
 		error("fsg_init failed");
 		return CMD_RET_FAILURE;
 	}
 
-	g_dnl_register("usb_dnl_ums");
+	rc = g_dnl_register("usb_dnl_ums");
+	if (rc) {
+		error("g_dnl_register failed");
+		return CMD_RET_FAILURE;
+	}
 
 	/* Timeout unit: seconds */
-	int cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
+	cable_ready_timeout = UMS_CABLE_READY_TIMEOUT;
 
 	if (!g_dnl_board_usb_cable_connected()) {
 		/*
@@ -91,7 +157,8 @@ exit:
 	return CMD_RET_SUCCESS;
 }
 
-U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
+U_BOOT_CMD(ums, 4, 1, do_usb_mass_storage,
 	"Use the UMS [User Mass Storage]",
-	"ums <USB_controller> <mmc_dev>  e.g. ums 0 0"
+	"ums <USB_controller> [<devtype>] <devnum>  e.g. ums 0 mmc 0\n"
+	"    devtype defaults to mmc"
 );