From: Lukasz Majewski l.majewski@samsung.com
This patch adds the USB Mass Storage Gadget to u-boot New command called "ums" is implemented to provide access to on-device embedded persistent memory.
USB Mass Storage is supposed to work on top of the USB Gadget framework
Signed-off-by: Lukasz Majewski l.majewski@samsung.com Signed-off-by: Piotr Wilczek p.wilczek@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com CC: Marek Vasut marek.vasut@gmail.com --- Changes in v2: None
common/Makefile | 1 + common/cmd_usb_mass_storage.c | 86 +++++++++++++++++++++++++++++++++++++++++ drivers/usb/gadget/g_dnl.c | 6 +++ include/usb_mass_storage.h | 55 ++++++++++++++++++++++++++ 4 files changed, 148 insertions(+) create mode 100644 common/cmd_usb_mass_storage.c create mode 100644 include/usb_mass_storage.h
diff --git a/common/Makefile b/common/Makefile index 54fcc81..8ec95d2 100644 --- a/common/Makefile +++ b/common/Makefile @@ -174,6 +174,7 @@ COBJS-y += cmd_usb.o COBJS-y += usb.o usb_hub.o COBJS-$(CONFIG_USB_STORAGE) += usb_storage.o endif +COBJS-$(CONFIG_CMD_USB_MASS_STORAGE) += cmd_usb_mass_storage.o COBJS-$(CONFIG_CMD_XIMG) += cmd_ximg.o COBJS-$(CONFIG_YAFFS2) += cmd_yaffs2.o COBJS-$(CONFIG_CMD_SPL) += cmd_spl.o diff --git a/common/cmd_usb_mass_storage.c b/common/cmd_usb_mass_storage.c new file mode 100644 index 0000000..87a5f2f --- /dev/null +++ b/common/cmd_usb_mass_storage.c @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2011 Samsung Electronics + * Lukasz Majewski l.majewski@samsung.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <errno.h> +#include <common.h> +#include <command.h> +#include <g_dnl.h> +#include <usb_mass_storage.h> + +int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag, + int argc, char * const argv[]) +{ + char *ep; + unsigned int dev_num = 0, offset = 0, part_size = 0; + int rc; + + struct ums_board_info *ums_info; + static char *s = "ums"; + + if (argc < 2) { + printf("usage: ums <dev> - e.g. ums 0\n"); + return 0; + } + + dev_num = (int)simple_strtoul(argv[1], &ep, 16); + + if (dev_num) { + puts("\nSet eMMC device to 0! - e.g. ums 0\n"); + goto fail; + } + + board_usb_init(); + ums_info = board_ums_init(dev_num, offset, part_size); + + if (!ums_info) { + printf("MMC: %d -> NOT available\n", dev_num); + goto fail; + } + rc = fsg_init(ums_info); + if (rc) { + printf("cmd ums: fsg_init failed\n"); + goto fail; + } + + g_dnl_register(s); + + while (1) { + /* Handle control-c and timeouts */ + if (ctrlc()) { + printf("The remote end did not respond in time.\n"); + goto exit; + } + usb_gadget_handle_interrupts(); + /* Check if USB cable has been detached */ + if (fsg_main_thread(NULL) == EIO) + goto exit; + } +exit: + g_dnl_unregister(); + return 0; + +fail: + return -1; +} + +U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage, + "Use the UMS [User Mass Storage]", + "ums - User Mass Storage Gadget" +); diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c index a5a4c1f..cc3f344 100644 --- a/drivers/usb/gadget/g_dnl.c +++ b/drivers/usb/gadget/g_dnl.c @@ -31,6 +31,7 @@
#include "gadget_chips.h" #include "composite.c" +#include "f_mass_storage.c"
/* * One needs to define the following: @@ -104,6 +105,8 @@ static int g_dnl_do_config(struct usb_configuration *c) printf("GADGET DRIVER: %s\n", s); if (!strcmp(s, "usb_dnl_dfu")) ret = dfu_add(c); + else if (!strcmp(s, "usb_dnl_ums")) + ret = fsg_add(c);
return ret; } @@ -188,6 +191,9 @@ int g_dnl_register(const char *type) if (!strcmp(type, "dfu")) { strcpy(name, shortname); strcat(name, type); + } else if (!strcmp(type, "ums")) { + strcpy(name, shortname); + strcat(name, type); } else { printf("%s: unknown command: %s\n", __func__, type); return -EINVAL; diff --git a/include/usb_mass_storage.h b/include/usb_mass_storage.h new file mode 100644 index 0000000..ffc3a13 --- /dev/null +++ b/include/usb_mass_storage.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2011 Samsung Electrnoics + * Lukasz Majewski l.majewski@samsung.com + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * aloong with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __USB_MASS_STORAGE_H__ +#define __USB_MASS_STORAGE_H__ + +#define SECTOR_SIZE 0x200 + +#include <mmc.h> + +struct ums_device { + struct mmc *mmc; + int dev_num; + int offset; + int part_size; +}; + +struct ums_board_info { + int (*read_sector)(struct ums_device *ums_dev, + ulong start, lbaint_t blkcnt, void *buf); + int (*write_sector)(struct ums_device *ums_dev, + ulong start, lbaint_t blkcnt, const void *buf); + void (*get_capacity)(struct ums_device *ums_dev, + long long int *capacity); + const char *name; + struct ums_device ums_dev; +}; + +extern void board_usb_init(void); + +extern int fsg_init(struct ums_board_info *); +extern void fsg_cleanup(void); +extern struct ums_board_info *board_ums_init(unsigned int, + unsigned int, unsigned int); +extern int usb_gadget_handle_interrupts(void); +extern int fsg_main_thread(void *); + +#endif /* __USB_MASS_STORAGE_H__ */