From: Przemyslaw Marczak Date: Wed, 23 Oct 2013 12:30:42 +0000 (+0200) Subject: usb: ums: code refactoring to improve reusability on other boards. X-Git-Url: http://git.dujemihanovic.xyz/img/static/gitweb.css?a=commitdiff_plain;h=93c813b3ac4b23df891992f93252c59231dec388;p=u-boot.git usb: ums: code refactoring to improve reusability on other boards. This patch introduces some cleanups to ums code. Changes: ums common: - introduce UMS_START_SECTOR and UMS_NUM_SECTORS as defined in usb_mass_storage.h both default values as 0 if board config doesn't define them common cleanup changes: - change name of struct "ums_board_info" to "ums" - "ums_device" fields are moved to struct ums and "dev_num" is removed - change function name: board_ums_init to ums_init - remove "extern" prefixes from usb_mass_storage.h cmd_usb_mass_storage: - change error() to printf() if need to print info message - change return values to command_ret_t type at ums command code - add command usage string Changes v2: ums common: - always returns number of read/write sectors - coding style clean-up ums gadget: - calculate amount of read/write from device returned value. Signed-off-by: Przemyslaw Marczak Cc: Marek Vasut --- diff --git a/board/samsung/trats/trats.c b/board/samsung/trats/trats.c index d31d511e39..7d91d88879 100644 --- a/board/samsung/trats/trats.c +++ b/board/samsung/trats/trats.c @@ -774,63 +774,54 @@ void init_panel_info(vidinfo_t *vid) } #ifdef CONFIG_USB_GADGET_MASS_STORAGE -static int ums_read_sector(struct ums_device *ums_dev, +static int ums_read_sector(struct ums *ums_dev, ulong start, lbaint_t blkcnt, void *buf) { - if (ums_dev->mmc->block_dev.block_read(ums_dev->dev_num, - start + ums_dev->offset, blkcnt, buf) != blkcnt) - return -1; + block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev; + lbaint_t blkstart = start + ums_dev->offset; + int dev_num = block_dev->dev; - return 0; + return block_dev->block_read(dev_num, blkstart, blkcnt, buf); } -static int ums_write_sector(struct ums_device *ums_dev, +static int ums_write_sector(struct ums *ums_dev, ulong start, lbaint_t blkcnt, const void *buf) { - if (ums_dev->mmc->block_dev.block_write(ums_dev->dev_num, - start + ums_dev->offset, blkcnt, buf) != blkcnt) - return -1; + block_dev_desc_t *block_dev = &ums_dev->mmc->block_dev; + lbaint_t blkstart = start + ums_dev->offset; + int dev_num = block_dev->dev; - return 0; + return block_dev->block_write(dev_num, blkstart, blkcnt, buf); } -static void ums_get_capacity(struct ums_device *ums_dev, - long long int *capacity) +static void ums_get_capacity(struct ums *ums_dev, long long int *capacity) { long long int tmp_capacity; - tmp_capacity = (long long int) ((ums_dev->offset + ums_dev->part_size) - * SECTOR_SIZE); + tmp_capacity = (long long int)((ums_dev->offset + ums_dev->part_size) + * SECTOR_SIZE); *capacity = ums_dev->mmc->capacity - tmp_capacity; } -static struct ums_board_info ums_board = { +static struct ums ums_dev = { .read_sector = ums_read_sector, .write_sector = ums_write_sector, .get_capacity = ums_get_capacity, - .name = "TRATS UMS disk", - .ums_dev = { - .mmc = NULL, - .dev_num = 0, - .offset = 0, - .part_size = 0. - }, + .name = "UMS disk", + .offset = UMS_START_SECTOR, + .part_size = UMS_NUM_SECTORS, }; -struct ums_board_info *board_ums_init(unsigned int dev_num, unsigned int offset, - unsigned int part_size) +struct ums *ums_init(unsigned int dev_num) { - struct mmc *mmc; + struct mmc *mmc = NULL; mmc = find_mmc_device(dev_num); if (!mmc) return NULL; - ums_board.ums_dev.mmc = mmc; - ums_board.ums_dev.dev_num = dev_num; - ums_board.ums_dev.offset = offset; - ums_board.ums_dev.part_size = part_size; + ums_dev.mmc = mmc; - return &ums_board; + return &ums_dev; } #endif diff --git a/common/cmd_usb_mass_storage.c b/common/cmd_usb_mass_storage.c index f583cafa35..f6ceba7e85 100644 --- a/common/cmd_usb_mass_storage.c +++ b/common/cmd_usb_mass_storage.c @@ -22,28 +22,26 @@ int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag, unsigned int dev_num = (unsigned int)(simple_strtoul(mmc_devstring, NULL, 0)); - if (dev_num) { - error("Set eMMC device to 0! - e.g. ums 0"); - goto fail; - } + if (dev_num) + return CMD_RET_USAGE; unsigned int 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."); - goto fail; + return CMD_RET_FAILURE; } - struct ums_board_info *ums_info = board_ums_init(dev_num, 0, 0); - if (!ums_info) { - error("MMC: %d -> NOT available", dev_num); - goto fail; + struct ums *ums = ums_init(dev_num); + if (!ums) { + printf("MMC: %u no such device\n", dev_num); + return CMD_RET_FAILURE; } - int rc = fsg_init(ums_info); + int rc = fsg_init(ums); if (rc) { error("fsg_init failed"); - goto fail; + return CMD_RET_FAILURE; } g_dnl_register("ums"); @@ -62,13 +60,10 @@ int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag, } exit: g_dnl_unregister(); - return 0; - -fail: - return -1; + return CMD_RET_SUCCESS; } U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage, "Use the UMS [User Mass Storage]", - " " + "ums e.g. ums 0 0" ); diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c index 6ecdea3e14..be6b418d4e 100644 --- a/drivers/usb/gadget/f_mass_storage.c +++ b/drivers/usb/gadget/f_mass_storage.c @@ -441,7 +441,7 @@ static void set_bulk_out_req_length(struct fsg_common *common, /*-------------------------------------------------------------------------*/ -struct ums_board_info *ums_info; +struct ums *ums; struct fsg_common *the_fsg_common; static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep) @@ -757,14 +757,14 @@ static int do_read(struct fsg_common *common) } /* Perform the read */ - nread = 0; - rc = ums_info->read_sector(&(ums_info->ums_dev), - file_offset / SECTOR_SIZE, - amount / SECTOR_SIZE, - (char __user *)bh->buf); - if (rc) + rc = ums->read_sector(ums, + file_offset / SECTOR_SIZE, + amount / SECTOR_SIZE, + (char __user *)bh->buf); + if (!rc) return -EIO; - nread = amount; + + nread = rc * SECTOR_SIZE; VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, (unsigned long long) file_offset, @@ -931,13 +931,13 @@ static int do_write(struct fsg_common *common) amount = bh->outreq->actual; /* Perform the write */ - rc = ums_info->write_sector(&(ums_info->ums_dev), + rc = ums->write_sector(ums, file_offset / SECTOR_SIZE, amount / SECTOR_SIZE, (char __user *)bh->buf); - if (rc) + if (!rc) return -EIO; - nwritten = amount; + nwritten = rc * SECTOR_SIZE; VLDBG(curlun, "file write %u @ %llu -> %d\n", amount, (unsigned long long) file_offset, @@ -959,6 +959,8 @@ static int do_write(struct fsg_common *common) /* If an error occurred, report it and its position */ if (nwritten < amount) { + printf("nwritten:%d amount:%d\n", nwritten, + amount); curlun->sense_data = SS_WRITE_ERROR; curlun->info_valid = 1; break; @@ -1045,14 +1047,13 @@ static int do_verify(struct fsg_common *common) } /* Perform the read */ - nread = 0; - rc = ums_info->read_sector(&(ums_info->ums_dev), - file_offset / SECTOR_SIZE, - amount / SECTOR_SIZE, - (char __user *)bh->buf); - if (rc) + rc = ums->read_sector(ums, + file_offset / SECTOR_SIZE, + amount / SECTOR_SIZE, + (char __user *)bh->buf); + if (!rc) return -EIO; - nread = amount; + nread = rc * SECTOR_SIZE; VLDBG(curlun, "file read %u @ %llu -> %d\n", amount, (unsigned long long) file_offset, @@ -1100,7 +1101,7 @@ static int do_inquiry(struct fsg_common *common, struct fsg_buffhd *bh) buf[4] = 31; /* Additional length */ /* No special options */ sprintf((char *) (buf + 8), "%-8s%-16s%04x", (char*) vendor_id , - ums_info->name, (u16) 0xffff); + ums->name, (u16) 0xffff); return 36; } @@ -2753,9 +2754,9 @@ int fsg_add(struct usb_configuration *c) return fsg_bind_config(c->cdev, c, fsg_common); } -int fsg_init(struct ums_board_info *ums) +int fsg_init(struct ums *ums_dev) { - ums_info = ums; + ums = ums_dev; return 0; } diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c index 866e7c7b8a..c2c5424f51 100644 --- a/drivers/usb/gadget/storage_common.c +++ b/drivers/usb/gadget/storage_common.c @@ -275,7 +275,6 @@ struct rw_semaphore { int i; }; #define ETOOSMALL 525 #include -extern struct ums_board_info *ums_info; /*-------------------------------------------------------------------------*/ @@ -581,7 +580,7 @@ static int fsg_lun_open(struct fsg_lun *curlun, const char *filename) /* R/W if we can, R/O if we must */ ro = curlun->initially_ro; - ums_info->get_capacity(&(ums_info->ums_dev), &size); + ums->get_capacity(ums, &size); if (size < 0) { printf("unable to find file size: %s\n", filename); rc = (int) size; diff --git a/include/usb_mass_storage.h b/include/usb_mass_storage.h index 13f535ce2e..674ca70c59 100644 --- a/include/usb_mass_storage.h +++ b/include/usb_mass_storage.h @@ -9,32 +9,35 @@ #define __USB_MASS_STORAGE_H__ #define SECTOR_SIZE 0x200 - #include #include -struct ums_device { - struct mmc *mmc; - int dev_num; - int offset; - int part_size; -}; +#ifndef UMS_START_SECTOR +#define UMS_START_SECTOR 0 +#endif -struct ums_board_info { - int (*read_sector)(struct ums_device *ums_dev, +#ifndef UMS_NUM_SECTORS +#define UMS_NUM_SECTORS 0 +#endif + +struct ums { + int (*read_sector)(struct ums *ums_dev, ulong start, lbaint_t blkcnt, void *buf); - int (*write_sector)(struct ums_device *ums_dev, + int (*write_sector)(struct ums *ums_dev, ulong start, lbaint_t blkcnt, const void *buf); - void (*get_capacity)(struct ums_device *ums_dev, + void (*get_capacity)(struct ums *ums_dev, long long int *capacity); const char *name; - struct ums_device ums_dev; + struct mmc *mmc; + int offset; + int part_size; }; -int fsg_init(struct ums_board_info *); +extern struct ums *ums; + +int fsg_init(struct ums *); void fsg_cleanup(void); -struct ums_board_info *board_ums_init(unsigned int, unsigned int, - unsigned int); +struct ums *ums_init(unsigned int); int fsg_main_thread(void *); #ifdef CONFIG_USB_GADGET_MASS_STORAGE