1 /* 2 * Copyright (c) 2013 Google, Inc 3 * 4 * (C) Copyright 2012 5 * Marek Vasut <marex@denx.de> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <dm.h> 12 #include <malloc.h> 13 #include <errno.h> 14 #include <asm/io.h> 15 #include <dm/root.h> 16 #include <dm/test.h> 17 #include <dm/uclass-internal.h> 18 19 /** 20 * dm_display_line() - Display information about a single device 21 * 22 * Displays a single line of information with an option prefix 23 * 24 * @dev: Device to display 25 * @buf: Prefix to display at the start of the line 26 */ 27 static void dm_display_line(struct udevice *dev, char *buf) 28 { 29 printf("%s- %c %s @ %08lx", buf, 30 dev->flags & DM_FLAG_ACTIVATED ? '*' : ' ', 31 dev->name, (ulong)map_to_sysmem(dev)); 32 puts("\n"); 33 } 34 35 static int display_succ(struct udevice *in, char *buf) 36 { 37 int len; 38 int ip = 0; 39 char local[16]; 40 struct udevice *pos, *n, *prev = NULL; 41 42 dm_display_line(in, buf); 43 44 if (list_empty(&in->child_head)) 45 return 0; 46 47 len = strlen(buf); 48 strncpy(local, buf, sizeof(local)); 49 snprintf(local + len, 2, "|"); 50 if (len && local[len - 1] == '`') 51 local[len - 1] = ' '; 52 53 list_for_each_entry_safe(pos, n, &in->child_head, sibling_node) { 54 if (ip++) 55 display_succ(prev, local); 56 prev = pos; 57 } 58 59 snprintf(local + len, 2, "`"); 60 display_succ(prev, local); 61 62 return 0; 63 } 64 65 static int dm_dump(struct udevice *dev) 66 { 67 if (!dev) 68 return -EINVAL; 69 return display_succ(dev, ""); 70 } 71 72 static int do_dm_dump_all(cmd_tbl_t *cmdtp, int flag, int argc, 73 char * const argv[]) 74 { 75 struct udevice *root; 76 77 root = dm_root(); 78 printf("ROOT %08lx\n", (ulong)map_to_sysmem(root)); 79 return dm_dump(root); 80 } 81 82 static int do_dm_dump_uclass(cmd_tbl_t *cmdtp, int flag, int argc, 83 char * const argv[]) 84 { 85 struct uclass *uc; 86 int ret; 87 int id; 88 89 for (id = 0; id < UCLASS_COUNT; id++) { 90 struct udevice *dev; 91 92 ret = uclass_get(id, &uc); 93 if (ret) 94 continue; 95 96 printf("uclass %d: %s\n", id, uc->uc_drv->name); 97 for (ret = uclass_first_device(id, &dev); 98 dev; 99 ret = uclass_next_device(&dev)) { 100 dm_display_line(dev, ""); 101 } 102 puts("\n"); 103 } 104 105 return 0; 106 } 107 108 #ifdef CONFIG_DM_TEST 109 static int do_dm_test(cmd_tbl_t *cmdtp, int flag, int argc, 110 char * const argv[]) 111 { 112 return dm_test_main(); 113 } 114 #define TEST_HELP "\ndm test Run tests" 115 #else 116 #define TEST_HELP 117 #endif 118 119 static cmd_tbl_t test_commands[] = { 120 U_BOOT_CMD_MKENT(tree, 0, 1, do_dm_dump_all, "", ""), 121 U_BOOT_CMD_MKENT(uclass, 1, 1, do_dm_dump_uclass, "", ""), 122 #ifdef CONFIG_DM_TEST 123 U_BOOT_CMD_MKENT(test, 1, 1, do_dm_test, "", ""), 124 #endif 125 }; 126 127 static int do_dm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 128 { 129 cmd_tbl_t *test_cmd; 130 int ret; 131 132 if (argc != 2) 133 return CMD_RET_USAGE; 134 test_cmd = find_cmd_tbl(argv[1], test_commands, 135 ARRAY_SIZE(test_commands)); 136 argc -= 2; 137 argv += 2; 138 if (!test_cmd || argc > test_cmd->maxargs) 139 return CMD_RET_USAGE; 140 141 ret = test_cmd->cmd(test_cmd, flag, argc, argv); 142 143 return cmd_process_error(test_cmd, ret); 144 } 145 146 U_BOOT_CMD( 147 dm, 2, 1, do_dm, 148 "Driver model low level access", 149 "tree Dump driver model tree ('*' = activated)\n" 150 "dm uclass Dump list of instances for each uclass" 151 TEST_HELP 152 ); 153