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>master
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/*
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* Handling of common block commands |
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* |
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* Copyright (c) 2017 Google, Inc |
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* |
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* (C) Copyright 2000-2011 |
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <blk.h> |
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#ifdef HAVE_BLOCK_DEVICE |
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int blk_common_cmd(int argc, char * const argv[], enum if_type if_type, |
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int *cur_devnump) |
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{ |
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const char *if_name = blk_get_if_type_name(if_type); |
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switch (argc) { |
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case 0: |
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case 1: |
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return CMD_RET_USAGE; |
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case 2: |
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if (strncmp(argv[1], "inf", 3) == 0) { |
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blk_list_devices(if_type); |
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return 0; |
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} else if (strncmp(argv[1], "dev", 3) == 0) { |
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if (blk_print_device_num(if_type, *cur_devnump)) { |
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printf("\nno %s devices available\n", if_name); |
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return CMD_RET_FAILURE; |
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} |
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return 0; |
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} else if (strncmp(argv[1], "part", 4) == 0) { |
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if (blk_list_part(if_type)) |
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printf("\nno %s devices available\n", if_name); |
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return 0; |
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} |
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return CMD_RET_USAGE; |
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case 3: |
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if (strncmp(argv[1], "dev", 3) == 0) { |
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int dev = (int)simple_strtoul(argv[2], NULL, 10); |
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if (!blk_show_device(if_type, dev)) { |
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*cur_devnump = dev; |
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printf("... is now current device\n"); |
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} else { |
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return CMD_RET_FAILURE; |
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} |
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return 0; |
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} else if (strncmp(argv[1], "part", 4) == 0) { |
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int dev = (int)simple_strtoul(argv[2], NULL, 10); |
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if (blk_print_part_devnum(if_type, dev)) { |
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printf("\n%s device %d not available\n", |
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if_name, dev); |
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return CMD_RET_FAILURE; |
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} |
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return 0; |
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} |
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return CMD_RET_USAGE; |
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default: /* at least 4 args */ |
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if (strcmp(argv[1], "read") == 0) { |
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ulong addr = simple_strtoul(argv[2], NULL, 16); |
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lbaint_t blk = simple_strtoul(argv[3], NULL, 16); |
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ulong cnt = simple_strtoul(argv[4], NULL, 16); |
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ulong n; |
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printf("\n%s read: device %d block # %lld, count %ld ... ", |
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if_name, *cur_devnump, (unsigned long long)blk, |
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cnt); |
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n = blk_read_devnum(if_type, *cur_devnump, blk, cnt, |
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(ulong *)addr); |
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printf("%ld blocks read: %s\n", n, |
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n == cnt ? "OK" : "ERROR"); |
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return n == cnt ? 0 : 1; |
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} else if (strcmp(argv[1], "write") == 0) { |
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ulong addr = simple_strtoul(argv[2], NULL, 16); |
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lbaint_t blk = simple_strtoul(argv[3], NULL, 16); |
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ulong cnt = simple_strtoul(argv[4], NULL, 16); |
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ulong n; |
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printf("\n%s write: device %d block # %lld, count %ld ... ", |
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if_name, *cur_devnump, (unsigned long long)blk, |
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cnt); |
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n = blk_write_devnum(if_type, *cur_devnump, blk, cnt, |
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(ulong *)addr); |
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printf("%ld blocks written: %s\n", n, |
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n == cnt ? "OK" : "ERROR"); |
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return n == cnt ? 0 : 1; |
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} else { |
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return CMD_RET_USAGE; |
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} |
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return 0; |
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} |
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} |
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#endif |
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