1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
27 #include "time_support.h"
35 #include <sys/types.h>
40 /* command handlers */
41 int handle_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
42 int handle_flash_banks_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
43 int handle_flash_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
44 int handle_flash_probe_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
45 int handle_flash_erase_check_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
46 int handle_flash_protect_check_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
47 int handle_flash_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
48 int handle_flash_write_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
49 int handle_flash_write_binary_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
50 int handle_flash_write_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
51 int handle_flash_protect_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
52 int handle_flash_auto_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
56 extern flash_driver_t lpc2000_flash;
57 extern flash_driver_t cfi_flash;
58 extern flash_driver_t at91sam7_flash;
59 extern flash_driver_t str7x_flash;
60 extern flash_driver_t str9x_flash;
61 extern flash_driver_t stellaris_flash;
62 extern flash_driver_t str9xpec_flash;
63 extern flash_driver_t stm32x_flash;
65 flash_driver_t *flash_drivers[] =
78 flash_bank_t *flash_banks;
79 static command_t *flash_cmd;
80 static int auto_erase = 0;
82 int flash_register_commands(struct command_context_s *cmd_ctx)
84 flash_cmd = register_command(cmd_ctx, NULL, "flash", NULL, COMMAND_ANY, NULL);
86 register_command(cmd_ctx, flash_cmd, "bank", handle_flash_bank_command, COMMAND_CONFIG, NULL);
91 int flash_init(struct command_context_s *cmd_ctx)
95 register_command(cmd_ctx, flash_cmd, "banks", handle_flash_banks_command, COMMAND_EXEC,
96 "list configured flash banks ");
97 register_command(cmd_ctx, flash_cmd, "info", handle_flash_info_command, COMMAND_EXEC,
98 "print info about flash bank <num>");
99 register_command(cmd_ctx, flash_cmd, "probe", handle_flash_probe_command, COMMAND_EXEC,
100 "identify flash bank <num>");
101 register_command(cmd_ctx, flash_cmd, "erase_check", handle_flash_erase_check_command, COMMAND_EXEC,
102 "check erase state of sectors in flash bank <num>");
103 register_command(cmd_ctx, flash_cmd, "protect_check", handle_flash_protect_check_command, COMMAND_EXEC,
104 "check protection state of sectors in flash bank <num>");
105 register_command(cmd_ctx, flash_cmd, "erase", handle_flash_erase_command, COMMAND_EXEC,
106 "erase sectors at <bank> <first> <last>");
107 register_command(cmd_ctx, flash_cmd, "write", handle_flash_write_binary_command, COMMAND_EXEC,
108 "DEPRECATED, use 'write_binary' or 'write_image' instead");
109 register_command(cmd_ctx, flash_cmd, "write_binary", handle_flash_write_binary_command, COMMAND_EXEC,
110 "write binary <bank> <file> <offset>");
111 register_command(cmd_ctx, flash_cmd, "write_image", handle_flash_write_image_command, COMMAND_EXEC,
112 "write image <file> [offset] [type]");
113 register_command(cmd_ctx, flash_cmd, "protect", handle_flash_protect_command, COMMAND_EXEC,
114 "set protection of sectors at <bank> <first> <last> <on|off>");
115 register_command(cmd_ctx, flash_cmd, "auto_erase", handle_flash_auto_erase_command, COMMAND_EXEC,
116 "auto erase flash sectors <on|off>");
122 flash_bank_t *get_flash_bank_by_num(int num)
127 for (p = flash_banks; p; p = p->next)
138 /* flash_bank <driver> <base> <size> <chip_width> <bus_width> <target> [driver_options ...]
140 int handle_flash_bank_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
148 WARNING("incomplete flash_bank configuration");
149 WARNING("flash_bank <driver> <base> <size> <chip_width> <bus_width> <target> [driver_options ...]");
153 if ((target = get_target_by_num(strtoul(args[5], NULL, 0))) == NULL)
155 ERROR("target %lu not defined", strtoul(args[5], NULL, 0));
159 for (i = 0; flash_drivers[i]; i++)
161 if (strcmp(args[0], flash_drivers[i]->name) == 0)
165 /* register flash specific commands */
166 if (flash_drivers[i]->register_commands(cmd_ctx) != ERROR_OK)
168 ERROR("couldn't register '%s' commands", args[0]);
172 c = malloc(sizeof(flash_bank_t));
174 c->driver = flash_drivers[i];
175 c->driver_priv = NULL;
176 c->base = strtoul(args[1], NULL, 0);
177 c->size = strtoul(args[2], NULL, 0);
178 c->chip_width = strtoul(args[3], NULL, 0);
179 c->bus_width = strtoul(args[4], NULL, 0);
\r
180 c->num_sectors = 0;
\r
184 if (flash_drivers[i]->flash_bank_command(cmd_ctx, cmd, args, argc, c) != ERROR_OK)
186 ERROR("'%s' driver rejected flash bank at 0x%8.8x", args[0], c->base);
191 /* put flash bank in linked list */
194 /* find last flash bank */
195 for (p = flash_banks; p && p->next; p = p->next);
208 /* no matching flash driver found */
211 ERROR("flash driver '%s' not found", args[0]);
218 int handle_flash_banks_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
225 command_print(cmd_ctx, "no flash banks configured");
229 for (p = flash_banks; p; p = p->next)
231 command_print(cmd_ctx, "#%i: %s at 0x%8.8x, size 0x%8.8x, buswidth %i, chipwidth %i",
232 i++, p->driver->name, p->base, p->size, p->bus_width, p->chip_width);
238 int handle_flash_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
246 command_print(cmd_ctx, "usage: flash info <num>");
250 for (p = flash_banks; p; p = p->next, i++)
252 if (i == strtoul(args[0], NULL, 0))
256 command_print(cmd_ctx, "#%i: %s at 0x%8.8x, size 0x%8.8x, buswidth %i, chipwidth %i",
257 i, p->driver->name, p->base, p->size, p->bus_width, p->chip_width);
258 for (j = 0; j < p->num_sectors; j++)
260 char *erase_state, *protect_state;
262 if (p->sectors[j].is_erased == 0)
263 erase_state = "not erased";
264 else if (p->sectors[j].is_erased == 1)
265 erase_state = "erased";
267 erase_state = "erase state unknown";
269 if (p->sectors[j].is_protected == 0)
270 protect_state = "not protected";
271 else if (p->sectors[j].is_protected == 1)
272 protect_state = "protected";
274 protect_state = "protection state unknown";
276 command_print(cmd_ctx, "\t#%i: 0x%8.8x (0x%x %ikB) %s, %s",
277 j, p->sectors[j].offset, p->sectors[j].size, p->sectors[j].size>>10,
278 erase_state, protect_state);
281 p->driver->info(p, buf, 1024);
282 command_print(cmd_ctx, "%s", buf);
289 int handle_flash_probe_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
296 command_print(cmd_ctx, "usage: flash probe <num>");
300 p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
303 if ((retval = p->driver->probe(p)) == ERROR_OK)
305 command_print(cmd_ctx, "flash '%s' found at 0x%8.8x", p->driver->name, p->base);
307 else if (retval == ERROR_FLASH_BANK_INVALID)
309 command_print(cmd_ctx, "probing failed for flash bank '#%s' at 0x%8.8x",
314 command_print(cmd_ctx, "unknown error when probing flash bank '#%s' at 0x%8.8x",
320 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
326 int handle_flash_erase_check_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
333 command_print(cmd_ctx, "usage: flash erase_check <num>");
337 p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
340 if ((retval = p->driver->erase_check(p)) == ERROR_OK)
342 command_print(cmd_ctx, "successfully checked erase state", p->driver->name, p->base);
346 command_print(cmd_ctx, "unknown error when checking erase state of flash bank #%s at 0x%8.8x",
352 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
358 int handle_flash_protect_check_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
365 command_print(cmd_ctx, "usage: flash protect_check <num>");
369 p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
372 if ((retval = p->driver->protect_check(p)) == ERROR_OK)
374 command_print(cmd_ctx, "successfully checked protect state");
376 else if (retval == ERROR_FLASH_OPERATION_FAILED)
378 command_print(cmd_ctx, "checking protection state failed (possibly unsupported) by flash #%s at 0x%8.8x", args[0], p->base);
382 command_print(cmd_ctx, "unknown error when checking protection state of flash bank '#%s' at 0x%8.8x", args[0], p->base);
387 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
393 int handle_flash_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
397 int first = strtoul(args[1], NULL, 0);
398 int last = strtoul(args[2], NULL, 0);
400 flash_bank_t *p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
404 duration_start_measure(&duration);
408 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
412 if ((retval = p->driver->erase(p, first, last)) != ERROR_OK)
416 case ERROR_TARGET_NOT_HALTED:
417 command_print(cmd_ctx, "can't work with this flash while target is running");
419 case ERROR_INVALID_ARGUMENTS:
420 command_print(cmd_ctx, "usage: flash_erase <bank> <first> <last>");
422 case ERROR_FLASH_BANK_INVALID:
423 command_print(cmd_ctx, "no '%s' flash found at 0x%8.8x", p->driver->name, p->base);
425 case ERROR_FLASH_OPERATION_FAILED:
426 command_print(cmd_ctx, "flash erase error");
428 case ERROR_FLASH_SECTOR_INVALID:
429 command_print(cmd_ctx, "sector number(s) invalid");
432 command_print(cmd_ctx, "erased flash sectors %i to %i", first, last);
435 command_print(cmd_ctx, "unknown error");
440 duration_stop_measure(&duration, &duration_text);
442 command_print(cmd_ctx, "erased sectors %i through %i on flash bank %i in %s", first, last, strtoul(args[0], 0, 0), duration_text);
448 command_print(cmd_ctx, "usage: flash erase <bank> <first> <last>");
454 int handle_flash_protect_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
458 int first = strtoul(args[1], NULL, 0);
459 int last = strtoul(args[2], NULL, 0);
462 flash_bank_t *p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
465 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
469 if (strcmp(args[3], "on") == 0)
471 else if (strcmp(args[3], "off") == 0)
475 command_print(cmd_ctx, "usage: flash protect <bank> <first> <last> <on|off>");
479 if ((retval = p->driver->protect(p, set, first, last)) != ERROR_OK)
483 case ERROR_TARGET_NOT_HALTED:
484 command_print(cmd_ctx, "can't work with this flash while target is running");
486 case ERROR_INVALID_ARGUMENTS:
487 command_print(cmd_ctx, "usage: flash protect <bank> <first> <last> <on|off>");
489 case ERROR_FLASH_BANK_INVALID:
490 command_print(cmd_ctx, "no '%s' flash found at 0x%8.8x", p->driver->name, p->base);
492 case ERROR_FLASH_OPERATION_FAILED:
493 command_print(cmd_ctx, "flash program error");
495 case ERROR_FLASH_SECTOR_INVALID:
496 command_print(cmd_ctx, "sector number(s) invalid");
499 command_print(cmd_ctx, "protection of flash sectors %i to %i turned %s", first, last, args[3]);
502 command_print(cmd_ctx, "unknown error");
507 command_print(cmd_ctx, "%s protection for sectors %i through %i on flash bank %i", (set) ? "set" : "cleared", first, last, strtoul(args[0], 0, 0));
512 command_print(cmd_ctx, "usage: flash protect <bank> <first> <last> <on|off>");
518 int handle_flash_write_image_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
520 target_t *target = get_current_target(cmd_ctx);
534 if (!strcmp(cmd, "write"))
536 command_print(cmd_ctx, "'flash write' has been deprecated in favor of 'flash write_binary' and 'flash write_image'");
537 DEBUG("'flash write' has been deprecated in favor of 'flash write_binary' and 'flash write_image'");
542 command_print(cmd_ctx, "usage: flash write <file> [offset] [type]");
548 ERROR("no target selected");
552 duration_start_measure(&duration);
556 image.base_address_set = 1;
557 image.base_address = strtoul(args[1], NULL, 0);
561 image.base_address_set = 0;
562 image.base_address = 0x0;
565 image.start_address_set = 0;
567 retval = image_open(&image, args[0], (argc == 3) ? args[2] : NULL);
568 if (retval != ERROR_OK)
570 command_print(cmd_ctx, "image_open error: %s", image.error_str);
574 failed = malloc(sizeof(int) * image.num_sections);
577 retval = flash_write(target, &image, &written, &error_str, failed, auto_erase);
579 if (retval != ERROR_OK)
583 command_print(cmd_ctx, "failed writing image %s: %s", args[0], error_str);
591 for (i = 0; i < image.num_sections; i++)
595 command_print(cmd_ctx, "didn't write section at 0x%8.8x, size 0x%8.8x",
596 image.sections[i].base_address, image.sections[i].size);
600 duration_stop_measure(&duration, &duration_text);
601 command_print(cmd_ctx, "wrote %u byte from file %s in %s (%f kb/s)",
602 written, args[0], duration_text,
603 (float)written / 1024.0 / ((float)duration.duration.tv_sec + ((float)duration.duration.tv_usec / 1000000.0)));
613 int handle_flash_write_binary_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
629 command_print(cmd_ctx, "usage: flash write <bank> <file> <offset>");
633 duration_start_measure(&duration);
635 offset = strtoul(args[2], NULL, 0);
636 p = get_flash_bank_by_num(strtoul(args[0], NULL, 0));
639 command_print(cmd_ctx, "flash bank '#%s' is out of bounds", args[0]);
643 if (fileio_open(&fileio, args[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
645 command_print(cmd_ctx, "flash write error: %s", fileio.error_str);
649 buffer = malloc(fileio.size);
650 if (fileio_read(&fileio, fileio.size, buffer, &buf_cnt) != ERROR_OK)
652 command_print(cmd_ctx, "flash write error: %s", fileio.error_str);
656 if ((retval = p->driver->write(p, buffer, offset, buf_cnt)) != ERROR_OK)
658 command_print(cmd_ctx, "failed writing file %s to flash bank %i at offset 0x%8.8x",
659 args[1], strtoul(args[0], NULL, 0), strtoul(args[2], NULL, 0));
662 case ERROR_TARGET_NOT_HALTED:
663 command_print(cmd_ctx, "can't work with this flash while target is running");
665 case ERROR_INVALID_ARGUMENTS:
666 command_print(cmd_ctx, "usage: flash write <bank> <file> <offset>");
668 case ERROR_FLASH_BANK_INVALID:
669 command_print(cmd_ctx, "no '%s' flash found at 0x%8.8x", p->driver->name, p->base);
671 case ERROR_FLASH_OPERATION_FAILED:
672 command_print(cmd_ctx, "flash program error");
674 case ERROR_FLASH_DST_BREAKS_ALIGNMENT:
675 command_print(cmd_ctx, "offset breaks required alignment");
677 case ERROR_FLASH_DST_OUT_OF_BANK:
678 command_print(cmd_ctx, "destination is out of flash bank (offset and/or file too large)");
680 case ERROR_FLASH_SECTOR_NOT_ERASED:
681 command_print(cmd_ctx, "destination sector(s) not erased");
684 command_print(cmd_ctx, "unknown error");
690 duration_stop_measure(&duration, &duration_text);
691 command_print(cmd_ctx, "wrote %"PRIi64" byte from file %s to flash bank %i at offset 0x%8.8x in %s (%f kb/s)",
692 fileio.size, args[1], strtoul(args[0], NULL, 0), offset, duration_text,
693 (float)fileio.size / 1024.0 / ((float)duration.duration.tv_sec + ((float)duration.duration.tv_usec / 1000000.0)));
696 fileio_close(&fileio);
701 /* lookup flash bank by address */
702 flash_bank_t *get_flash_bank_by_addr(target_t *target, u32 addr)
706 /* cycle through bank list */
707 for (c = flash_banks; c; c = c->next)
709 /* check whether address belongs to this flash bank */
710 if ((addr >= c->base) && (addr < c->base + c->size) && target == c->target)
717 /* erase given flash region, selects proper bank according to target and address */
718 int flash_erase(target_t *target, u32 addr, u32 length)
725 if ((c = get_flash_bank_by_addr(target, addr)) == NULL)
726 return ERROR_FLASH_DST_OUT_OF_BANK; /* no corresponding bank found */
728 if (c->size == 0 || c->num_sectors == 0)
729 return ERROR_FLASH_BANK_INVALID;
733 /* special case, erase whole bank when length is zero */
735 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
737 return c->driver->erase(c, 0, c->num_sectors - 1);
740 /* check whether it fits */
741 if (addr + length > c->base + c->size)
742 return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
746 for (i = 0; i < c->num_sectors; i++)
748 /* check whether sector overlaps with the given range and is not yet erased */
749 if (addr < c->sectors[i].offset + c->sectors[i].size && addr + length > c->sectors[i].offset && c->sectors[i].is_erased != 1) {
750 /* if first is not set yet then this is the first sector */
753 last = i; /* and it is the last one so far in any case */
757 if( first == -1 || last == -1 )
760 return c->driver->erase(c, first, last);
763 /* write an image to flash memory of the given target */
764 int flash_write(target_t *target, image_t *image, u32 *written, char **error_str, int *failed, int erase)
779 for (i = 0; i < image->num_sections; i++)
782 /* loop until we reach end of the image */
783 while (section < image->num_sections)
790 u32 run_address = image->sections[section].base_address+section_offset;
791 u32 run_size = image->sections[section].size-section_offset;
793 if (image->sections[section].size == 0)
795 WARNING("empty section %d", section);
801 /* find the corresponding flash bank */
802 if ((c = get_flash_bank_by_addr(target, run_address)) == NULL)
806 if (error_str == NULL)
807 return ERROR_FLASH_DST_OUT_OF_BANK; /* abort operation */
808 *error_str = malloc(FLASH_MAX_ERROR_STR);
809 snprintf(*error_str, FLASH_MAX_ERROR_STR, "no flash mapped at requested address");
810 return ERROR_FLASH_DST_OUT_OF_BANK; /* abort operation */
812 failed[section] = ERROR_FLASH_DST_OUT_OF_BANK; /* mark the section as failed */
813 section++; /* and skip it */
818 /* collect consecutive sections which fall into the same bank */
819 section_first = section;
820 section_last = section;
821 while ((run_address + run_size < c->base + c->size)
822 && (section_last + 1 < image->num_sections))
824 if (image->sections[section_last + 1].base_address < (run_address + run_size))
826 WARNING("section %d out of order", section_last + 1);
829 if (image->sections[section_last + 1].base_address != (run_address + run_size))
831 run_size += image->sections[++section_last].size;
834 /* fit the run into bank constraints */
835 if (run_address + run_size > c->base + c->size)
836 run_size = c->base + c->size - run_address;
838 /* allocate buffer */
839 buffer = malloc(run_size);
842 /* read sections to the buffer */
843 while (buffer_size < run_size)
847 if (buffer_size - run_size <= image->sections[section].size - section_offset)
848 size_read = buffer_size - run_size;
850 size_read = image->sections[section].size - section_offset;
852 if ((retval = image_read_section(image, section, section_offset,
853 size_read, buffer + buffer_size, &size_read)) != ERROR_OK || size_read == 0)
857 if (error_str == NULL)
858 return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
860 *error_str = malloc(FLASH_MAX_ERROR_STR);
862 /* if image_read_section returned an error there's an error string we can pass on */
863 if (retval != ERROR_OK)
864 snprintf(*error_str, FLASH_MAX_ERROR_STR, "error reading from image: %s", image->error_str);
866 snprintf(*error_str, FLASH_MAX_ERROR_STR, "error reading from image");
868 return ERROR_IMAGE_TEMPORARILY_UNAVAILABLE;
871 buffer_size += size_read;
872 section_offset += size_read;
874 if (section_offset >= image->sections[section].size)
885 /* calculate and erase sectors */
886 retval = flash_erase( target, run_address, run_size );
889 if (retval == ERROR_OK)
891 /* write flash sectors */
892 retval = c->driver->write(c, buffer, run_address - c->base, run_size);
897 if (retval != ERROR_OK)
899 if (error_str == NULL)
900 return retval; /* abort operation */
902 *error_str = malloc(FLASH_MAX_ERROR_STR);
905 case ERROR_TARGET_NOT_HALTED:
906 snprintf(*error_str, FLASH_MAX_ERROR_STR, "can't flash image while target is running");
908 case ERROR_INVALID_ARGUMENTS:
909 snprintf(*error_str, FLASH_MAX_ERROR_STR, "flash driver can't fulfill request");
911 case ERROR_FLASH_OPERATION_FAILED:
912 snprintf(*error_str, FLASH_MAX_ERROR_STR, "flash program error");
914 case ERROR_FLASH_DST_BREAKS_ALIGNMENT:
915 snprintf(*error_str, FLASH_MAX_ERROR_STR, "offset breaks required alignment");
917 case ERROR_FLASH_DST_OUT_OF_BANK:
918 snprintf(*error_str, FLASH_MAX_ERROR_STR, "no flash mapped at requested address");
920 case ERROR_FLASH_SECTOR_NOT_ERASED:
921 snprintf(*error_str, FLASH_MAX_ERROR_STR, "destination sector(s) not erased");
924 snprintf(*error_str, FLASH_MAX_ERROR_STR, "unknown error: %i", retval);
927 return retval; /* abort operation */
931 *written += run_size; /* add run size to total written counter */
937 int handle_flash_auto_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
941 command_print(cmd_ctx, "usage: flash auto_erase <on|off>");
945 if (strcmp(args[0], "on") == 0)
947 else if (strcmp(args[0], "off") == 0)