Most block devices provide a command (e.g. 'sata', 'scsi', 'ide') and these commands generally do the same thing. This makes it harder to maintain this code and keep it consistent.
We now have a block device interface which is either implemented by driver model (when CONFIG_BLK is enabled) or with a legacy interface. Therefore it is possible to handle most of what these commands do with generic code.
Add a new generic function to process block-device commands using the interface type and the current device number for that type.
Signed-off-by: Simon Glass sjg@chromium.org ---
cmd/Makefile | 1 + cmd/blk_common.c | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ include/blk.h | 12 +++++++ 3 files changed, 117 insertions(+) create mode 100644 cmd/blk_common.c
diff --git a/cmd/Makefile b/cmd/Makefile index bd231f24d8..e2b3a9cc71 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -15,6 +15,7 @@ obj-y += version.o # command obj-$(CONFIG_CMD_AES) += aes.o obj-$(CONFIG_CMD_ARMFLASH) += armflash.o +obj-y += blk_common.o obj-$(CONFIG_SOURCE) += source.o obj-$(CONFIG_CMD_SOURCE) += source.o obj-$(CONFIG_CMD_BDI) += bdinfo.o diff --git a/cmd/blk_common.c b/cmd/blk_common.c new file mode 100644 index 0000000000..86c75e78d8 --- /dev/null +++ b/cmd/blk_common.c @@ -0,0 +1,104 @@ +/* + * Handling of common block commands + * + * Copyright (c) 2017 Google, Inc + * + * (C) Copyright 2000-2011 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <blk.h> + +#ifdef HAVE_BLOCK_DEVICE +int blk_common_cmd(int argc, char * const argv[], enum if_type if_type, + int *cur_devnump) +{ + const char *if_name = blk_get_if_type_name(if_type); + + switch (argc) { + case 0: + case 1: + return CMD_RET_USAGE; + case 2: + if (strncmp(argv[1], "inf", 3) == 0) { + blk_list_devices(if_type); + return 0; + } else if (strncmp(argv[1], "dev", 3) == 0) { + if (blk_print_device_num(if_type, *cur_devnump)) { + printf("\nno %s devices available\n", if_name); + return CMD_RET_FAILURE; + } + return 0; + } else if (strncmp(argv[1], "part", 4) == 0) { + if (blk_list_part(if_type)) + printf("\nno %s devices available\n", if_name); + return 0; + } + return CMD_RET_USAGE; + case 3: + if (strncmp(argv[1], "dev", 3) == 0) { + int dev = (int)simple_strtoul(argv[2], NULL, 10); + + if (!blk_show_device(if_type, dev)) { + *cur_devnump = dev; + printf("... is now current device\n"); + } else { + return CMD_RET_FAILURE; + } + return 0; + } else if (strncmp(argv[1], "part", 4) == 0) { + int dev = (int)simple_strtoul(argv[2], NULL, 10); + + if (blk_print_part_devnum(if_type, dev)) { + printf("\n%s device %d not available\n", + if_name, dev); + return CMD_RET_FAILURE; + } + return 0; + } + return CMD_RET_USAGE; + + default: /* at least 4 args */ + if (strcmp(argv[1], "read") == 0) { + ulong addr = simple_strtoul(argv[2], NULL, 16); + lbaint_t blk = simple_strtoul(argv[3], NULL, 16); + ulong cnt = simple_strtoul(argv[4], NULL, 16); + ulong n; + + printf("\n%s read: device %d block # %lld, count %ld ... ", + if_name, *cur_devnump, (unsigned long long)blk, + cnt); + + n = blk_read_devnum(if_type, *cur_devnump, blk, cnt, + (ulong *)addr); + + printf("%ld blocks read: %s\n", n, + n == cnt ? "OK" : "ERROR"); + return n == cnt ? 0 : 1; + } else if (strcmp(argv[1], "write") == 0) { + ulong addr = simple_strtoul(argv[2], NULL, 16); + lbaint_t blk = simple_strtoul(argv[3], NULL, 16); + ulong cnt = simple_strtoul(argv[4], NULL, 16); + ulong n; + + printf("\n%s write: device %d block # %lld, count %ld ... ", + if_name, *cur_devnump, (unsigned long long)blk, + cnt); + + n = blk_write_devnum(if_type, *cur_devnump, blk, cnt, + (ulong *)addr); + + printf("%ld blocks written: %s\n", n, + n == cnt ? "OK" : "ERROR"); + return n == cnt ? 0 : 1; + } else { + return CMD_RET_USAGE; + } + + return 0; + } +} +#endif diff --git a/include/blk.h b/include/blk.h index 69076d3683..5e29c6a21f 100644 --- a/include/blk.h +++ b/include/blk.h @@ -631,4 +631,16 @@ int blk_select_hwpart_devnum(enum if_type if_type, int devnum, int hwpart); */ const char *blk_get_if_type_name(enum if_type if_type);
+/** + * blk_common_cmd() - handle common commands with block devices + * + * @args: Number of arguments to the command (argv[0] is the command itself) + * @argv: Command arguments + * @if_type: Interface type + * @cur_devnump: Current device number for this interface type + * @return 0 if OK, CMD_RET_ERROR on error + */ +int blk_common_cmd(int argc, char * const argv[], enum if_type if_type, + int *cur_devnump); + #endif