ums: move IO support code to common location

There's nothing Samsung-/board-specfic about the implementation of
ums_init(). Move the code into cmd_usb_mass_storage.c, so that it can
be shared by any user of that command.

Cc: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>

board/samsung/common/Makefile

@@ -7,7 +7,6 @@
 
 obj-$(CONFIG_SOFT_I2C_MULTI_BUS) += multi_i2c.o
 obj-$(CONFIG_THOR_FUNCTION) += thor.o
-obj-$(CONFIG_CMD_USB_MASS_STORAGE) += ums.o
 obj-$(CONFIG_MISC_COMMON) += misc.o
 
 ifndef CONFIG_SPL_BUILD

board/samsung/common/ums.c

@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2013 Samsung Electronics
- * Lukasz Majewski <l.majewski@samsung.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-#include <common.h>
-#include <usb_mass_storage.h>
-#include <mmc.h>
-#include <part.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(unsigned int dev_num)
-{
-	struct mmc *mmc = NULL;
-
-	mmc = find_mmc_device(dev_num);
-	if (!mmc || mmc_init(mmc))
-		return NULL;
-
-	ums_dev.block_dev = &mmc->block_dev;
-	ums_dev.start_sector = 0;
-	ums_dev.num_sectors = mmc->capacity / SECTOR_SIZE;
-
-	printf("UMS: disk start sector: %#x, count: %#x\n",
-	       ums_dev.start_sector, ums_dev.num_sectors);
-
-	return &ums_dev;
-}

common/cmd_usb_mass_storage.c

@@ -9,9 +9,55 @@
 #include <common.h>
 #include <command.h>
 #include <g_dnl.h>
+#include <mmc.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(unsigned int dev_num)
+{
+	struct mmc *mmc = NULL;
+
+	mmc = find_mmc_device(dev_num);
+	if (!mmc || mmc_init(mmc))
+		return NULL;
+
+	ums_dev.block_dev = &mmc->block_dev;
+	ums_dev.start_sector = 0;
+	ums_dev.num_sectors = mmc->capacity / SECTOR_SIZE;
+
+	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[])
 {

include/usb_mass_storage.h

@@ -30,7 +30,6 @@ extern struct ums *ums;
 
 int fsg_init(struct ums *);
 void fsg_cleanup(void);
-struct ums *ums_init(unsigned int);
 int fsg_main_thread(void *);
 int fsg_add(struct usb_configuration *c);
 #endif /* __USB_MASS_STORAGE_H__ */