]> git.sur5r.net Git - openocd/blobdiff - src/flash/nor/tcl.c
flash/nor: implement protection blocks of different size than erase sector
[openocd] / src / flash / nor / tcl.c
index ad2b8f11d89402673d880b509f4f5a0adab35879..6dd21407e877d37bca938ce498683b0da7703d26 100644 (file)
@@ -15,9 +15,7 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #include <helper/time_support.h>
 #include <target/image.h>
 
-COMMAND_HELPER(flash_command_get_bank, unsigned name_index,
-               struct flash_bank **bank)
+/**
+ * @file
+ * Implements Tcl commands used to access NOR flash facilities.
+ */
+
+COMMAND_HELPER(flash_command_get_bank_maybe_probe, unsigned name_index,
+              struct flash_bank **bank, bool do_probe)
 {
        const char *name = CMD_ARGV[name_index];
-       *bank = get_flash_bank_by_name(name);
+       int retval;
+       if (do_probe) {
+               retval = get_flash_bank_by_name(name, bank);
+       } else {
+               *bank  = get_flash_bank_by_name_noprobe(name);
+               retval = ERROR_OK;
+       }
+
+       if (retval != ERROR_OK)
+               return retval;
        if (*bank)
                return ERROR_OK;
 
        unsigned bank_num;
        COMMAND_PARSE_NUMBER(uint, name, bank_num);
 
-       *bank = get_flash_bank_by_num(bank_num);
-       if (!*bank)
-       {
-               command_print(CMD_CTX, "flash bank '%s' not found", name);
-               return ERROR_INVALID_ARGUMENTS;
+       if (do_probe) {
+               return get_flash_bank_by_num(bank_num, bank);
+       } else {
+               *bank  = get_flash_bank_by_num_noprobe(bank_num);
+               retval = (bank) ? ERROR_OK : ERROR_FAIL;
+               return retval;
        }
-       return ERROR_OK;
 }
 
+COMMAND_HELPER(flash_command_get_bank, unsigned name_index,
+       struct flash_bank **bank)
+{
+       return CALL_COMMAND_HANDLER(flash_command_get_bank_maybe_probe,
+                                   name_index, bank, true);
+}
 
 COMMAND_HANDLER(handle_flash_info_command)
 {
        struct flash_bank *p;
-       uint32_t i = 0;
        int j = 0;
        int retval;
+       bool show_sectors = false;
+       bool prot_block_available;
 
-       if (CMD_ARGC != 1)
+       if (CMD_ARGC < 1 || CMD_ARGC > 2)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       unsigned bank_nr;
-       COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
+       if (CMD_ARGC == 2) {
+               if (strcmp("sectors", CMD_ARGV[1]) == 0)
+                       show_sectors = true;
+               else
+                       return ERROR_COMMAND_SYNTAX_ERROR;
+       }
 
-       for (p = flash_bank_list(); p; p = p->next, i++)
-       {
-               if (i != bank_nr)
-                       continue;
+       retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (retval != ERROR_OK)
+               return retval;
 
+       if (p != NULL) {
                char buf[1024];
+               int num_blocks;
+               struct flash_sector *block_array;
 
                /* attempt auto probe */
-               if ((retval = p->driver->auto_probe(p)) != ERROR_OK)
+               retval = p->driver->auto_probe(p);
+               if (retval != ERROR_OK)
+                       return retval;
+
+               /* We must query the hardware to avoid printing stale information! */
+               retval = p->driver->protect_check(p);
+               if (retval != ERROR_OK)
                        return retval;
 
                command_print(CMD_CTX,
-                             "#%" PRIi32 " : %s at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32 ", buswidth %i, chipwidth %i",
-                             i,
-                             p->driver->name,
-                             p->base,
-                             p->size,
-                             p->bus_width,
-                             p->chip_width);
-               for (j = 0; j < p->num_sectors; j++)
-               {
-                       char *protect_state;
-
-                       if (p->sectors[j].is_protected == 0)
+                       "#%d : %s at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32
+                       ", buswidth %i, chipwidth %i",
+                       p->bank_number,
+                       p->driver->name,
+                       p->base,
+                       p->size,
+                       p->bus_width,
+                       p->chip_width);
+
+               prot_block_available = p->num_prot_blocks && p->prot_blocks;
+               if (!show_sectors && prot_block_available) {
+                       block_array = p->prot_blocks;
+                       num_blocks = p->num_prot_blocks;
+               } else {
+                       block_array = p->sectors;
+                       num_blocks = p->num_sectors;
+               }
+
+               for (j = 0; j < num_blocks; j++) {
+                       char *protect_state = "";
+
+                       if (block_array[j].is_protected == 0)
                                protect_state = "not protected";
-                       else if (p->sectors[j].is_protected == 1)
+                       else if (block_array[j].is_protected == 1)
                                protect_state = "protected";
-                       else
+                       else if (!show_sectors || !prot_block_available)
                                protect_state = "protection state unknown";
 
                        command_print(CMD_CTX,
-                                     "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
-                                     j,
-                                     p->sectors[j].offset,
-                                     p->sectors[j].size,
-                                     p->sectors[j].size >> 10,
-                                     protect_state);
+                               "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
+                               j,
+                               block_array[j].offset,
+                               block_array[j].size,
+                               block_array[j].size >> 10,
+                               protect_state);
                }
 
-               *buf = '\0'; /* initialize buffer, otherwise it migh contain garbage if driver function fails */
-               retval = p->driver->info(p, buf, sizeof(buf));
-               command_print(CMD_CTX, "%s", buf);
-               if (retval != ERROR_OK)
-                       LOG_ERROR("error retrieving flash info (%d)", retval);
+               if (p->driver->info != NULL) {
+                       retval = p->driver->info(p, buf, sizeof(buf));
+                       if (retval == ERROR_OK)
+                               command_print(CMD_CTX, "%s", buf);
+                       else
+                               LOG_ERROR("error retrieving flash info");
+               }
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 COMMAND_HANDLER(handle_flash_probe_command)
 {
+       struct flash_bank *p;
        int retval;
 
        if (CMD_ARGC != 1)
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
-       unsigned bank_nr;
-       COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], bank_nr);
-       struct flash_bank *p = get_flash_bank_by_num_noprobe(bank_nr);
-       if (p)
-       {
-               if ((retval = p->driver->probe(p)) == ERROR_OK)
-               {
-                       command_print(CMD_CTX, "flash '%s' found at 0x%8.8" PRIx32, p->driver->name, p->base);
-               }
-               else if (retval == ERROR_FLASH_BANK_INVALID)
-               {
-                       command_print(CMD_CTX, "probing failed for flash bank '#%s' at 0x%8.8" PRIx32,
-                                                 CMD_ARGV[0], p->base);
-               }
-               else
-               {
-                       command_print(CMD_CTX, "unknown error when probing flash bank '#%s' at 0x%8.8" PRIx32,
-                                                 CMD_ARGV[0], p->base);
-               }
-       }
-       else
-       {
+       retval = CALL_COMMAND_HANDLER(flash_command_get_bank_maybe_probe, 0, &p, false);
+       if (retval != ERROR_OK)
+               return retval;
+
+       if (p) {
+               retval = p->driver->probe(p);
+               if (retval == ERROR_OK)
+                       command_print(CMD_CTX,
+                               "flash '%s' found at 0x%8.8" PRIx32,
+                               p->driver->name,
+                               p->base);
+       } else {
                command_print(CMD_CTX, "flash bank '#%s' is out of bounds", CMD_ARGV[0]);
+               retval = ERROR_FAIL;
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 COMMAND_HANDLER(handle_flash_erase_check_command)
 {
+       bool blank = true;
        if (CMD_ARGC != 1)
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
        struct flash_bank *p;
        int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
@@ -159,121 +191,114 @@ COMMAND_HANDLER(handle_flash_erase_check_command)
                return retval;
 
        int j;
-       if ((retval = p->driver->erase_check(p)) == ERROR_OK)
-       {
+       retval = p->driver->erase_check(p);
+       if (retval == ERROR_OK)
                command_print(CMD_CTX, "successfully checked erase state");
-       }
-       else
-       {
-               command_print(CMD_CTX, "unknown error when checking erase state of flash bank #%s at 0x%8.8" PRIx32,
-                       CMD_ARGV[0], p->base);
+       else {
+               command_print(CMD_CTX,
+                       "unknown error when checking erase state of flash bank #%s at 0x%8.8" PRIx32,
+                       CMD_ARGV[0],
+                       p->base);
        }
 
-       for (j = 0; j < p->num_sectors; j++)
-       {
+       for (j = 0; j < p->num_sectors; j++) {
                char *erase_state;
 
                if (p->sectors[j].is_erased == 0)
                        erase_state = "not erased";
                else if (p->sectors[j].is_erased == 1)
-                       erase_state = "erased";
+                       continue;
                else
                        erase_state = "erase state unknown";
 
+               blank = false;
                command_print(CMD_CTX,
-                             "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
-                             j,
-                             p->sectors[j].offset,
-                             p->sectors[j].size,
-                             p->sectors[j].size >> 10,
-                             erase_state);
+                       "\t#%3i: 0x%8.8" PRIx32 " (0x%" PRIx32 " %" PRIi32 "kB) %s",
+                       j,
+                       p->sectors[j].offset,
+                       p->sectors[j].size,
+                       p->sectors[j].size >> 10,
+                       erase_state);
        }
 
-       return ERROR_OK;
+       if (blank)
+               command_print(CMD_CTX, "\tBank is erased");
+       return retval;
 }
 
 COMMAND_HANDLER(handle_flash_erase_address_command)
 {
        struct flash_bank *p;
-       int retval;
-       int address;
-       int length;
-
+       int retval = ERROR_OK;
+       uint32_t address;
+       uint32_t length;
+       bool do_pad = false;
+       bool do_unlock = false;
        struct target *target = get_current_target(CMD_CTX);
 
+       while (CMD_ARGC >= 3) {
+               /* Optionally pad out the address range to block/sector
+                * boundaries.  We can't know if there's data in that part
+                * of the flash; only do padding if we're told to.
+                */
+               if (strcmp("pad", CMD_ARGV[0]) == 0)
+                       do_pad = true;
+               else if (strcmp("unlock", CMD_ARGV[0]) == 0)
+                       do_unlock = true;
+               else
+                       return ERROR_COMMAND_SYNTAX_ERROR;
+               CMD_ARGC--;
+               CMD_ARGV++;
+       }
        if (CMD_ARGC != 2)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], address);
-       COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], length);
-       if (length <= 0)
-       {
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], length);
+
+       if (length <= 0) {
                command_print(CMD_CTX, "Length must be >0");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
 
-       p = get_flash_bank_by_addr(target, address);
-       if (p == NULL)
-       {
-               return ERROR_FAIL;
-       }
+       retval = get_flash_bank_by_addr(target, address, true, &p);
+       if (retval != ERROR_OK)
+               return retval;
 
-       /* We can't know if we did a resume + halt, in which case we no longer know the erased state */
+       /* We can't know if we did a resume + halt, in which case we no longer know the erased state
+        **/
        flash_set_dirty();
 
        struct duration bench;
        duration_start(&bench);
 
-       retval = flash_erase_address_range(target, address, length);
+       if (do_unlock)
+               retval = flash_unlock_address_range(target, address, length);
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(CMD_CTX, "erased address 0x%8.8x (length %i)"
-                               " in %fs (%0.3f kb/s)", address, length,
-                               duration_elapsed(&bench), duration_kbps(&bench, length));
-       }
+       if (retval == ERROR_OK)
+               retval = flash_erase_address_range(target, do_pad, address, length);
 
-       return retval;
-}
-
-COMMAND_HANDLER(handle_flash_protect_check_command)
-{
-       if (CMD_ARGC != 1)
-               return ERROR_COMMAND_SYNTAX_ERROR;
-
-       struct flash_bank *p;
-       int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
-       if (ERROR_OK != retval)
-               return retval;
-
-       if ((retval = p->driver->protect_check(p)) == ERROR_OK)
-       {
-               command_print(CMD_CTX, "successfully checked protect state");
-       }
-       else if (retval == ERROR_FLASH_OPERATION_FAILED)
-       {
-               command_print(CMD_CTX, "checking protection state failed (possibly unsupported) by flash #%s at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
-       }
-       else
-       {
-               command_print(CMD_CTX, "unknown error when checking protection state of flash bank '#%s' at 0x%8.8" PRIx32, CMD_ARGV[0], p->base);
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               command_print(CMD_CTX, "erased address 0x%8.8" PRIx32 " (length %" PRIi32 ")"
+                       " in %fs (%0.3f KiB/s)", address, length,
+                       duration_elapsed(&bench), duration_kbps(&bench, length));
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 static int flash_check_sector_parameters(struct command_context *cmd_ctx,
-               uint32_t first, uint32_t last, uint32_t num_sectors)
+       uint32_t first, uint32_t last, uint32_t num_sectors)
 {
        if (!(first <= last)) {
                command_print(cmd_ctx, "ERROR: "
-                               "first sector must be <= last sector");
+                       "first sector must be <= last sector");
                return ERROR_FAIL;
        }
 
        if (!(last <= (num_sectors - 1))) {
                command_print(cmd_ctx, "ERROR: last sector must be <= %d",
-                               (int) num_sectors - 1);
+                       (int) num_sectors - 1);
                return ERROR_FAIL;
        }
 
@@ -285,14 +310,15 @@ COMMAND_HANDLER(handle_flash_erase_command)
        if (CMD_ARGC != 3)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       uint32_t bank_nr;
        uint32_t first;
        uint32_t last;
 
-       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
-       struct flash_bank *p = get_flash_bank_by_num(bank_nr);
-       if (!p)
-               return ERROR_OK;
+       struct flash_bank *p;
+       int retval;
+
+       retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (retval != ERROR_OK)
+               return retval;
 
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
        if (strcmp(CMD_ARGV[2], "last") == 0)
@@ -300,9 +326,8 @@ COMMAND_HANDLER(handle_flash_erase_command)
        else
                COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
 
-       int retval;
-       if ((retval = flash_check_sector_parameters(CMD_CTX,
-                       first, last, p->num_sectors)) != ERROR_OK)
+       retval = flash_check_sector_parameters(CMD_CTX, first, last, p->num_sectors);
+       if (retval != ERROR_OK)
                return retval;
 
        struct duration bench;
@@ -310,11 +335,10 @@ COMMAND_HANDLER(handle_flash_erase_command)
 
        retval = flash_driver_erase(p, first, last);
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD_CTX, "erased sectors %" PRIu32 " "
-                               "through %" PRIu32" on flash bank %" PRIu32 " "
-                               "in %fs", first, last, bank_nr, duration_elapsed(&bench));
+                       "through %" PRIu32 " on flash bank %d "
+                       "in %fs", first, last, p->bank_number, duration_elapsed(&bench));
        }
 
        return ERROR_OK;
@@ -325,38 +349,44 @@ COMMAND_HANDLER(handle_flash_protect_command)
        if (CMD_ARGC != 4)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       uint32_t bank_nr;
        uint32_t first;
        uint32_t last;
 
-       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], bank_nr);
-       struct flash_bank *p = get_flash_bank_by_num(bank_nr);
-       if (!p)
-               return ERROR_OK;
+       struct flash_bank *p;
+       int retval;
+       int num_blocks;
+
+       retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (retval != ERROR_OK)
+               return retval;
+
+       if (p->num_prot_blocks)
+               num_blocks = p->num_prot_blocks;
+       else
+               num_blocks = p->num_sectors;
 
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], first);
        if (strcmp(CMD_ARGV[2], "last") == 0)
-               last = p->num_sectors - 1;
+               last = num_blocks - 1;
        else
                COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], last);
 
        bool set;
        COMMAND_PARSE_ON_OFF(CMD_ARGV[3], set);
 
-       int retval;
-       if ((retval = flash_check_sector_parameters(CMD_CTX,
-                       first, last, p->num_sectors)) != ERROR_OK)
+       retval = flash_check_sector_parameters(CMD_CTX, first, last, num_blocks);
+       if (retval != ERROR_OK)
                return retval;
 
        retval = flash_driver_protect(p, set, first, last);
        if (retval == ERROR_OK) {
                command_print(CMD_CTX, "%s protection for sectors %i "
-                               "through %i on flash bank %i",
+                       "through %i on flash bank %d",
                        (set) ? "set" : "cleared", (int) first,
-                       (int) last, (int) bank_nr);
+                       (int) last, p->bank_number);
        }
 
-       return ERROR_OK;
+       return retval;
 }
 
 COMMAND_HANDLER(handle_flash_write_image_command)
@@ -368,42 +398,29 @@ COMMAND_HANDLER(handle_flash_write_image_command)
 
        int retval;
 
-       if (CMD_ARGC < 1)
-       {
-               return ERROR_COMMAND_SYNTAX_ERROR;
-       }
-
        /* flash auto-erase is disabled by default*/
        int auto_erase = 0;
        bool auto_unlock = false;
 
-       for (;;)
-       {
-               if (strcmp(CMD_ARGV[0], "erase") == 0)
-               {
+       while (CMD_ARGC) {
+               if (strcmp(CMD_ARGV[0], "erase") == 0) {
                        auto_erase = 1;
                        CMD_ARGV++;
                        CMD_ARGC--;
                        command_print(CMD_CTX, "auto erase enabled");
-               } else if (strcmp(CMD_ARGV[0], "unlock") == 0)
-               {
+               } else if (strcmp(CMD_ARGV[0], "unlock") == 0) {
                        auto_unlock = true;
                        CMD_ARGV++;
                        CMD_ARGC--;
                        command_print(CMD_CTX, "auto unlock enabled");
                } else
-               {
                        break;
-               }
        }
 
        if (CMD_ARGC < 1)
-       {
                return ERROR_COMMAND_SYNTAX_ERROR;
-       }
 
-       if (!target)
-       {
+       if (!target) {
                LOG_ERROR("no target selected");
                return ERROR_FAIL;
        }
@@ -411,13 +428,10 @@ COMMAND_HANDLER(handle_flash_write_image_command)
        struct duration bench;
        duration_start(&bench);
 
-       if (CMD_ARGC >= 2)
-       {
+       if (CMD_ARGC >= 2) {
                image.base_address_set = 1;
-               COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], image.base_address);
-       }
-       else
-       {
+               COMMAND_PARSE_NUMBER(llong, CMD_ARGV[1], image.base_address);
+       } else {
                image.base_address_set = 0;
                image.base_address = 0x0;
        }
@@ -426,22 +440,18 @@ COMMAND_HANDLER(handle_flash_write_image_command)
 
        retval = image_open(&image, CMD_ARGV[0], (CMD_ARGC == 3) ? CMD_ARGV[2] : NULL);
        if (retval != ERROR_OK)
-       {
                return retval;
-       }
 
        retval = flash_write_unlock(target, &image, &written, auto_erase, auto_unlock);
-       if (retval != ERROR_OK)
-       {
+       if (retval != ERROR_OK) {
                image_close(&image);
                return retval;
        }
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD_CTX, "wrote %" PRIu32 " bytes from file %s "
-                               "in %fs (%0.3f kb/s)", written, CMD_ARGV[0],
-                               duration_elapsed(&bench), duration_kbps(&bench, written));
+                       "in %fs (%0.3f KiB/s)", written, CMD_ARGV[0],
+                       duration_elapsed(&bench), duration_kbps(&bench, written));
        }
 
        image_close(&image);
@@ -459,123 +469,108 @@ COMMAND_HANDLER(handle_flash_fill_command)
        uint32_t cur_size = 0;
        uint32_t chunk_count;
        struct target *target = get_current_target(CMD_CTX);
-       uint32_t i;
+       unsigned i;
        uint32_t wordsize;
        int retval = ERROR_OK;
 
        static size_t const chunksize = 1024;
-       uint8_t *chunk = malloc(chunksize);
-       if (chunk == NULL)
-               return ERROR_FAIL;
-
-       uint8_t *readback = malloc(chunksize);
-       if (readback == NULL)
-       {
-               free(chunk);
-               return ERROR_FAIL;
-       }
-
+       uint8_t *chunk = NULL, *readback = NULL;
 
-       if (CMD_ARGC != 3)
-       {
+       if (CMD_ARGC != 3) {
                retval = ERROR_COMMAND_SYNTAX_ERROR;
                goto done;
        }
 
-
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], pattern);
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], count);
 
+       chunk = malloc(chunksize);
+       if (chunk == NULL)
+               return ERROR_FAIL;
+
+       readback = malloc(chunksize);
+       if (readback == NULL) {
+               free(chunk);
+               return ERROR_FAIL;
+       }
+
        if (count == 0)
                goto done;
 
-       switch (CMD_NAME[4])
-       {
-       case 'w':
-               wordsize = 4;
-               break;
-       case 'h':
-               wordsize = 2;
-               break;
-       case 'b':
-               wordsize = 1;
-               break;
-       default:
-               retval = ERROR_COMMAND_SYNTAX_ERROR;
-               goto done;
+       switch (CMD_NAME[4]) {
+               case 'w':
+                       wordsize = 4;
+                       break;
+               case 'h':
+                       wordsize = 2;
+                       break;
+               case 'b':
+                       wordsize = 1;
+                       break;
+               default:
+                       retval = ERROR_COMMAND_SYNTAX_ERROR;
+                       goto done;
        }
 
        chunk_count = MIN(count, (chunksize / wordsize));
-       switch (wordsize)
-       {
-       case 4:
-               for (i = 0; i < chunk_count; i++)
-               {
-                       target_buffer_set_u32(target, chunk + i * wordsize, pattern);
-               }
-               break;
-       case 2:
-               for (i = 0; i < chunk_count; i++)
-               {
-                       target_buffer_set_u16(target, chunk + i * wordsize, pattern);
-               }
-               break;
-       case 1:
-               memset(chunk, pattern, chunk_count);
-               break;
-       default:
-               LOG_ERROR("BUG: can't happen");
-               exit(-1);
+       switch (wordsize) {
+               case 4:
+                       for (i = 0; i < chunk_count; i++)
+                               target_buffer_set_u32(target, chunk + i * wordsize, pattern);
+                       break;
+               case 2:
+                       for (i = 0; i < chunk_count; i++)
+                               target_buffer_set_u16(target, chunk + i * wordsize, pattern);
+                       break;
+               case 1:
+                       memset(chunk, pattern, chunk_count);
+                       break;
+               default:
+                       LOG_ERROR("BUG: can't happen");
+                       exit(-1);
        }
 
        struct duration bench;
        duration_start(&bench);
 
-       for (wrote = 0; wrote < (count*wordsize); wrote += cur_size)
-       {
+       for (wrote = 0; wrote < (count*wordsize); wrote += cur_size) {
                struct flash_bank *bank;
 
-               bank = get_flash_bank_by_addr(target, address);
-               if (bank == NULL)
-               {
-                       retval = ERROR_FAIL;
+               retval = get_flash_bank_by_addr(target, address, true, &bank);
+               if (retval != ERROR_OK)
                        goto done;
-               }
 
                cur_size = MIN((count * wordsize - wrote), chunksize);
                err = flash_driver_write(bank, chunk, address - bank->base + wrote, cur_size);
-               if (err != ERROR_OK)
-               {
+               if (err != ERROR_OK) {
                        retval = err;
                        goto done;
                }
 
-               err = target_read_buffer(target, address + wrote, cur_size, readback);
-               if (err != ERROR_OK)
-               {
+               err = flash_driver_read(bank, readback, address - bank->base + wrote, cur_size);
+               if (err != ERROR_OK) {
                        retval = err;
                        goto done;
                }
 
-               unsigned i;
-               for (i = 0; i < cur_size; i++)
-               {
-                       if (readback[i]!=chunk[i])
-                       {
-                               LOG_ERROR("Verfication error address 0x%08" PRIx32 ", read back 0x%02x, expected 0x%02x",
-                                                 address + wrote + i, readback[i], chunk[i]);
+               for (i = 0; i < cur_size; i++) {
+                       if (readback[i] != chunk[i]) {
+                               LOG_ERROR(
+                                       "Verification error address 0x%08" PRIx32 ", read back 0x%02x, expected 0x%02x",
+                                       address + wrote + i,
+                                       readback[i],
+                                       chunk[i]);
                                retval = ERROR_FAIL;
                                goto done;
                        }
                }
        }
 
-       if (duration_measure(&bench) == ERROR_OK)
-       {
+       if ((retval == ERROR_OK) && (duration_measure(&bench) == ERROR_OK)) {
                command_print(CMD_CTX, "wrote %" PRIu32 " bytes to 0x%8.8" PRIx32
-                               " in %fs (%0.3f kb/s)", wrote, address,
-                               duration_elapsed(&bench), duration_kbps(&bench, wrote));
+                       " in %fs (%0.3f KiB/s)", wrote, address,
+                       duration_elapsed(&bench), duration_kbps(&bench, wrote));
        }
 
 done:
@@ -589,7 +584,7 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
 {
        uint32_t offset;
        uint8_t *buffer;
-       struct fileio fileio;
+       struct fileio *fileio;
 
        if (CMD_ARGC != 3)
                return ERROR_COMMAND_SYNTAX_ERROR;
@@ -605,16 +600,25 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], offset);
 
        if (fileio_open(&fileio, CMD_ARGV[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
-       {
                return ERROR_OK;
+
+       size_t filesize;
+       retval = fileio_size(fileio, &filesize);
+       if (retval != ERROR_OK) {
+               fileio_close(fileio);
+               return retval;
        }
 
-       buffer = malloc(fileio.size);
+       buffer = malloc(filesize);
+       if (buffer == NULL) {
+               fileio_close(fileio);
+               LOG_ERROR("Out of memory");
+               return ERROR_FAIL;
+       }
        size_t buf_cnt;
-       if (fileio_read(&fileio, fileio.size, buffer, &buf_cnt) != ERROR_OK)
-       {
+       if (fileio_read(fileio, filesize, buffer, &buf_cnt) != ERROR_OK) {
                free(buffer);
-               fileio_close(&fileio);
+               fileio_close(fileio);
                return ERROR_OK;
        }
 
@@ -623,125 +627,331 @@ COMMAND_HANDLER(handle_flash_write_bank_command)
        free(buffer);
        buffer = NULL;
 
-       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK))
-       {
-               command_print(CMD_CTX, "wrote %ld bytes from file %s to flash bank %u"
-                               " at offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
-                               (long)fileio.size, CMD_ARGV[1], p->bank_number, offset,
-                               duration_elapsed(&bench), duration_kbps(&bench, fileio.size));
+       if ((ERROR_OK == retval) && (duration_measure(&bench) == ERROR_OK)) {
+               command_print(CMD_CTX, "wrote %zu bytes from file %s to flash bank %u"
+                       " at offset 0x%8.8" PRIx32 " in %fs (%0.3f KiB/s)",
+                       filesize, CMD_ARGV[1], p->bank_number, offset,
+                       duration_elapsed(&bench), duration_kbps(&bench, filesize));
        }
 
-       fileio_close(&fileio);
+       fileio_close(fileio);
 
        return retval;
 }
 
+COMMAND_HANDLER(handle_flash_read_bank_command)
+{
+       uint32_t offset;
+       uint8_t *buffer;
+       struct fileio *fileio;
+       uint32_t length;
+       size_t written;
+
+       if (CMD_ARGC != 4)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       struct duration bench;
+       duration_start(&bench);
+
+       struct flash_bank *p;
+       int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], offset);
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[3], length);
+
+       buffer = malloc(length);
+       if (buffer == NULL) {
+               LOG_ERROR("Out of memory");
+               return ERROR_FAIL;
+       }
+
+       retval = flash_driver_read(p, buffer, offset, length);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Read error");
+               free(buffer);
+               return retval;
+       }
+
+       retval = fileio_open(&fileio, CMD_ARGV[1], FILEIO_WRITE, FILEIO_BINARY);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Could not open file");
+               free(buffer);
+               return retval;
+       }
+
+       retval = fileio_write(fileio, length, buffer, &written);
+       fileio_close(fileio);
+       free(buffer);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Could not write file");
+               return ERROR_FAIL;
+       }
+
+       if (duration_measure(&bench) == ERROR_OK)
+               command_print(CMD_CTX, "wrote %ld bytes to file %s from flash bank %u"
+                       " at offset 0x%8.8" PRIx32 " in %fs (%0.3f KiB/s)",
+                       (long)written, CMD_ARGV[1], p->bank_number, offset,
+                       duration_elapsed(&bench), duration_kbps(&bench, written));
+
+       return retval;
+}
+
+
+COMMAND_HANDLER(handle_flash_verify_bank_command)
+{
+       uint32_t offset;
+       uint8_t *buffer_file, *buffer_flash;
+       struct fileio *fileio;
+       size_t read_cnt;
+       size_t filesize;
+       int differ;
+
+       if (CMD_ARGC != 3)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       struct duration bench;
+       duration_start(&bench);
+
+       struct flash_bank *p;
+       int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], offset);
+
+       retval = fileio_open(&fileio, CMD_ARGV[1], FILEIO_READ, FILEIO_BINARY);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Could not open file");
+               return retval;
+       }
+
+       retval = fileio_size(fileio, &filesize);
+       if (retval != ERROR_OK) {
+               fileio_close(fileio);
+               return retval;
+       }
+
+       buffer_file = malloc(filesize);
+       if (buffer_file == NULL) {
+               LOG_ERROR("Out of memory");
+               fileio_close(fileio);
+               return ERROR_FAIL;
+       }
+
+       retval = fileio_read(fileio, filesize, buffer_file, &read_cnt);
+       fileio_close(fileio);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("File read failure");
+               free(buffer_file);
+               return retval;
+       }
+
+       if (read_cnt != filesize) {
+               LOG_ERROR("Short read");
+               free(buffer_file);
+               return ERROR_FAIL;
+       }
+
+       buffer_flash = malloc(filesize);
+       if (buffer_flash == NULL) {
+               LOG_ERROR("Out of memory");
+               free(buffer_file);
+               return ERROR_FAIL;
+       }
+
+       retval = flash_driver_read(p, buffer_flash, offset, read_cnt);
+       if (retval != ERROR_OK) {
+               LOG_ERROR("Flash read error");
+               free(buffer_flash);
+               free(buffer_file);
+               return retval;
+       }
+
+       if (duration_measure(&bench) == ERROR_OK)
+               command_print(CMD_CTX, "read %ld bytes from file %s and flash bank %u"
+                       " at offset 0x%8.8" PRIx32 " in %fs (%0.3f KiB/s)",
+                       (long)read_cnt, CMD_ARGV[1], p->bank_number, offset,
+                       duration_elapsed(&bench), duration_kbps(&bench, read_cnt));
+
+       differ = memcmp(buffer_file, buffer_flash, read_cnt);
+       command_print(CMD_CTX, "contents %s", differ ? "differ" : "match");
+       if (differ) {
+               uint32_t t;
+               int diffs = 0;
+               for (t = 0; t < read_cnt; t++) {
+                       if (buffer_flash[t] == buffer_file[t])
+                               continue;
+                       command_print(CMD_CTX, "diff %d address 0x%08x. Was 0x%02x instead of 0x%02x",
+                                       diffs, t + offset, buffer_flash[t], buffer_file[t]);
+                       if (diffs++ >= 127) {
+                               command_print(CMD_CTX, "More than 128 errors, the rest are not printed.");
+                               break;
+                       }
+                       keep_alive();
+               }
+       }
+       free(buffer_flash);
+       free(buffer_file);
+
+       return differ ? ERROR_FAIL : ERROR_OK;
+}
+
 void flash_set_dirty(void)
 {
        struct flash_bank *c;
        int i;
 
        /* set all flash to require erasing */
-       for (c = flash_bank_list(); c; c = c->next)
-       {
+       for (c = flash_bank_list(); c; c = c->next) {
                for (i = 0; i < c->num_sectors; i++)
-               {
                        c->sectors[i].is_erased = 0;
-               }
        }
 }
 
+COMMAND_HANDLER(handle_flash_padded_value_command)
+{
+       if (CMD_ARGC != 2)
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       struct flash_bank *p;
+       int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       COMMAND_PARSE_NUMBER(u8, CMD_ARGV[1], p->default_padded_value);
+
+       command_print(CMD_CTX, "Default padded value set to 0x%" PRIx8 " for flash bank %u", \
+                       p->default_padded_value, p->bank_number);
+
+       return retval;
+}
+
 static const struct command_registration flash_exec_command_handlers[] = {
        {
                .name = "probe",
-               .handler = &handle_flash_probe_command,
+               .handler = handle_flash_probe_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank>",
-               .help = "identify flash bank",
+               .usage = "bank_id",
+               .help = "Identify a flash bank.",
        },
        {
                .name = "info",
-               .handler = &handle_flash_info_command,
+               .handler = handle_flash_info_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank>",
-               .help = "print bank information",
+               .usage = "bank_id ['sectors']",
+               .help = "Print information about a flash bank.",
        },
        {
                .name = "erase_check",
-               .handler = &handle_flash_erase_check_command,
+               .handler = handle_flash_erase_check_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank>",
-               .help = "check erase state of sectors",
-       },
-       {
-               .name = "protect_check",
-               .handler = &handle_flash_protect_check_command,
-               .mode = COMMAND_EXEC,
-               .usage = "<bank>",
-               .help = "check protection state of sectors",
+               .usage = "bank_id",
+               .help = "Check erase state of all blocks in a "
+                       "flash bank.",
        },
        {
                .name = "erase_sector",
-               .handler = &handle_flash_erase_command,
+               .handler = handle_flash_erase_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank> <first> <last>",
-               .help = "erase sectors",
+               .usage = "bank_id first_sector_num last_sector_num",
+               .help = "Erase a range of sectors in a flash bank.",
        },
        {
                .name = "erase_address",
-               .handler = &handle_flash_erase_address_command,
+               .handler = handle_flash_erase_address_command,
                .mode = COMMAND_EXEC,
-               .usage = "<address> <length>",
-               .help = "erase address range",
+               .usage = "['pad'] ['unlock'] address length",
+               .help = "Erase flash sectors starting at address and "
+                       "continuing for length bytes.  If 'pad' is specified, "
+                       "data outside that range may also be erased: the start "
+                       "address may be decreased, and length increased, so "
+                       "that all of the first and last sectors are erased. "
+                       "If 'unlock' is specified, then the flash is unprotected "
+                       "before erasing.",
 
        },
        {
                .name = "fillw",
-               .handler = &handle_flash_fill_command,
+               .handler = handle_flash_fill_command,
                .mode = COMMAND_EXEC,
-               .usage = "<address> <word_pattern> <count>",
-               .help = "fill with pattern (no autoerase)",
+               .usage = "address value n",
+               .help = "Fill n words with 32-bit value, starting at "
+                       "word address.  (No autoerase.)",
        },
        {
                .name = "fillh",
-               .handler = &handle_flash_fill_command,
+               .handler = handle_flash_fill_command,
                .mode = COMMAND_EXEC,
-               .usage = "<address> <halfword_pattern> <count>",
-               .help = "fill with pattern",
+               .usage = "address value n",
+               .help = "Fill n halfwords with 16-bit value, starting at "
+                       "word address.  (No autoerase.)",
        },
        {
                .name = "fillb",
-               .handler = &handle_flash_fill_command,
+               .handler = handle_flash_fill_command,
                .mode = COMMAND_EXEC,
-               .usage = "<address> <byte_pattern> <count>",
-               .help = "fill with pattern",
-
+               .usage = "address value n",
+               .help = "Fill n bytes with 8-bit value, starting at "
+                       "word address.  (No autoerase.)",
        },
        {
                .name = "write_bank",
-               .handler = &handle_flash_write_bank_command,
+               .handler = handle_flash_write_bank_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank> <file> <offset>",
-               .help = "write binary data",
+               .usage = "bank_id filename offset",
+               .help = "Write binary data from file to flash bank, "
+                       "starting at specified byte offset from the "
+                       "beginning of the bank.",
        },
        {
                .name = "write_image",
-               .handler = &handle_flash_write_image_command,
+               .handler = handle_flash_write_image_command,
+               .mode = COMMAND_EXEC,
+               .usage = "[erase] [unlock] filename [offset [file_type]]",
+               .help = "Write an image to flash.  Optionally first unprotect "
+                       "and/or erase the region to be used.  Allow optional "
+                       "offset from beginning of bank (defaults to zero)",
+       },
+       {
+               .name = "read_bank",
+               .handler = handle_flash_read_bank_command,
                .mode = COMMAND_EXEC,
-               .usage = "[erase] [unlock] <file> [offset] [type]",
-               .help = "write an image to flash"
+               .usage = "bank_id filename offset length",
+               .help = "Read binary data from flash bank to file, "
+                       "starting at specified byte offset from the "
+                       "beginning of the bank.",
+       },
+       {
+               .name = "verify_bank",
+               .handler = handle_flash_verify_bank_command,
+               .mode = COMMAND_EXEC,
+               .usage = "bank_id filename offset",
+               .help = "Read binary data from flash bank and file, "
+                       "starting at specified byte offset from the "
+                       "beginning of the bank. Compare the contents.",
        },
        {
                .name = "protect",
-               .handler = &handle_flash_protect_command,
+               .handler = handle_flash_protect_command,
+               .mode = COMMAND_EXEC,
+               .usage = "bank_id first_sector [last_sector|'last'] "
+                       "('on'|'off')",
+               .help = "Turn protection on or off for a range of sectors "
+                       "in a given flash bank.",
+       },
+       {
+               .name = "padded_value",
+               .handler = handle_flash_padded_value_command,
                .mode = COMMAND_EXEC,
-               .usage = "<bank> <first> <last> <on | off>",
-               .help = "set protection of sectors",
+               .usage = "bank_id value",
+               .help = "Set default flash padded value",
        },
        COMMAND_REGISTRATION_DONE
 };
 
-int flash_init_drivers(struct command_context *cmd_ctx)
+static int flash_init_drivers(struct command_context *cmd_ctx)
 {
        if (!flash_bank_list())
                return ERROR_OK;
@@ -750,44 +960,45 @@ int flash_init_drivers(struct command_context *cmd_ctx)
        return register_commands(cmd_ctx, parent, flash_exec_command_handlers);
 }
 
-
 COMMAND_HANDLER(handle_flash_bank_command)
 {
-       if (CMD_ARGC < 7)
-       {
+       if (CMD_ARGC < 7) {
                LOG_ERROR("usage: flash bank <name> <driver> "
-                               "<base> <size> <chip_width> <bus_width>");
+                       "<base> <size> <chip_width> <bus_width> <target>");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
-       // save bank name and advance arguments for compatibility
+       /* save bank name and advance arguments for compatibility */
        const char *bank_name = *CMD_ARGV++;
        CMD_ARGC--;
 
-       struct target *target;
-       if ((target = get_target(CMD_ARGV[5])) == NULL)
-       {
+       struct target *target = get_target(CMD_ARGV[5]);
+       if (target == NULL) {
                LOG_ERROR("target '%s' not defined", CMD_ARGV[5]);
                return ERROR_FAIL;
        }
 
        const char *driver_name = CMD_ARGV[0];
        struct flash_driver *driver = flash_driver_find_by_name(driver_name);
-       if (NULL == driver)
-       {
+       if (NULL == driver) {
                /* no matching flash driver found */
                LOG_ERROR("flash driver '%s' not found", driver_name);
                return ERROR_FAIL;
        }
 
+       /* check the flash bank name is unique */
+       if (get_flash_bank_by_name_noprobe(bank_name) != NULL) {
+               /* flash bank name already exists  */
+               LOG_ERROR("flash bank name '%s' already exists", bank_name);
+               return ERROR_FAIL;
+       }
+
        /* register flash specific commands */
-       if (NULL != driver->commands)
-       {
+       if (NULL != driver->commands) {
                int retval = register_commands(CMD_CTX, NULL,
                                driver->commands);
-               if (ERROR_OK != retval)
-               {
+               if (ERROR_OK != retval) {
                        LOG_ERROR("couldn't register '%s' commands",
-                                       driver_name);
+                               driver_name);
                        return ERROR_FAIL;
                }
        }
@@ -801,20 +1012,25 @@ COMMAND_HANDLER(handle_flash_bank_command)
        COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], c->size);
        COMMAND_PARSE_NUMBER(int, CMD_ARGV[3], c->chip_width);
        COMMAND_PARSE_NUMBER(int, CMD_ARGV[4], c->bus_width);
+       c->default_padded_value = 0xff;
        c->num_sectors = 0;
        c->sectors = NULL;
+       c->num_prot_blocks = 0;
+       c->prot_blocks = NULL;
        c->next = NULL;
 
        int retval;
        retval = CALL_COMMAND_HANDLER(driver->flash_bank_command, c);
-       if (ERROR_OK != retval)
-       {
-               LOG_ERROR("'%s' driver rejected flash bank at 0x%8.8" PRIx32,
-                               driver_name, c->base);
+       if (ERROR_OK != retval) {
+               LOG_ERROR("'%s' driver rejected flash bank at 0x%8.8" PRIx32 "; usage: %s",
+                       driver_name, c->base, driver->usage);
                free(c);
                return retval;
        }
 
+       if (driver->usage == NULL)
+               LOG_DEBUG("'%s' driver usage field missing", driver_name);
+
        flash_bank_add(c);
 
        return ERROR_OK;
@@ -823,32 +1039,29 @@ COMMAND_HANDLER(handle_flash_bank_command)
 COMMAND_HANDLER(handle_flash_banks_command)
 {
        if (CMD_ARGC != 0)
-               return ERROR_INVALID_ARGUMENTS;
+               return ERROR_COMMAND_SYNTAX_ERROR;
 
        unsigned n = 0;
-       for (struct flash_bank *p = flash_bank_list(); p; p = p->next, n++)
-       {
-               LOG_USER("#%u: %s at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32 ", "
-                       "buswidth %u, chipwidth %u", n,
-                       p->driver->name, p->base, p->size,
+       for (struct flash_bank *p = flash_bank_list(); p; p = p->next, n++) {
+               LOG_USER("#%d : %s (%s) at 0x%8.8" PRIx32 ", size 0x%8.8" PRIx32 ", "
+                       "buswidth %u, chipwidth %u", p->bank_number,
+                       p->name, p->driver->name, p->base, p->size,
                        p->bus_width, p->chip_width);
        }
        return ERROR_OK;
 }
 
-static int jim_flash_list(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+static int jim_flash_list(Jim_Interp *interp, int argc, Jim_Obj * const *argv)
 {
-       if (argc != 1)
-       {
+       if (argc != 1) {
                Jim_WrongNumArgs(interp, 1, argv,
-                               "no arguments to 'flash list' command");
+                       "no arguments to 'flash list' command");
                return JIM_ERR;
        }
 
        Jim_Obj *list = Jim_NewListObj(interp, NULL, 0);
 
-       for (struct flash_bank *p = flash_bank_list(); p; p = p->next)
-       {
+       for (struct flash_bank *p = flash_bank_list(); p; p = p->next) {
                Jim_Obj *elem = Jim_NewListObj(interp, NULL, 0);
 
                Jim_ListAppendElement(interp, elem, Jim_NewStringObj(interp, "name", -1));
@@ -870,15 +1083,13 @@ static int jim_flash_list(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        return JIM_OK;
 }
 
-
 COMMAND_HANDLER(handle_flash_init_command)
 {
        if (CMD_ARGC != 0)
                return ERROR_COMMAND_SYNTAX_ERROR;
 
-       static bool flash_initialized = false;
-       if (flash_initialized)
-       {
+       static bool flash_initialized;
+       if (flash_initialized) {
                LOG_INFO("'flash init' has already been called");
                return ERROR_OK;
        }
@@ -891,10 +1102,10 @@ COMMAND_HANDLER(handle_flash_init_command)
 static const struct command_registration flash_config_command_handlers[] = {
        {
                .name = "bank",
-               .handler = &handle_flash_bank_command,
+               .handler = handle_flash_bank_command,
                .mode = COMMAND_CONFIG,
-               .usage = "<name> <driver> <base> <size> "
-                       "<chip_width> <bus_width> <target> "
+               .usage = "bank_id driver_name base_address size_bytes "
+                       "chip_width_bytes bus_width_bytes target "
                        "[driver_options ...]",
                .help = "Define a new bank with the given name, "
                        "using the specified NOR flash driver.",
@@ -902,20 +1113,20 @@ static const struct command_registration flash_config_command_handlers[] = {
        {
                .name = "init",
                .mode = COMMAND_CONFIG,
-               .handler = &handle_flash_init_command,
-               .help = "initialize flash devices",
+               .handler = handle_flash_init_command,
+               .help = "Initialize flash devices.",
        },
        {
                .name = "banks",
                .mode = COMMAND_ANY,
-               .handler = &handle_flash_banks_command,
-               .help = "return readable information about the flash banks",
+               .handler = handle_flash_banks_command,
+               .help = "Display table with information about flash banks.",
        },
        {
                .name = "list",
                .mode = COMMAND_ANY,
-               .jim_handler = &jim_flash_list,
-               .help = "returns a list of details about the flash banks",
+               .jim_handler = jim_flash_list,
+               .help = "Returns a list of details about the flash banks.",
        },
        COMMAND_REGISTRATION_DONE
 };