add const keyword to some APIs
[fw/openocd] / src / flash / nand.c
index e0dfa22ff9afb0d86bf1b031711f019a95f259b8..c1be276d1e6b2894a966a33cf9b600213dbc2914 100644 (file)
@@ -2,10 +2,8 @@
  *   Copyright (C) 2007 by Dominic Rath                                    *
  *   Dominic.Rath@gmx.de                                                   *
  *                                                                         *
- *   partially based on                                                    *
- *      drivers/mtd/nand_ids.c                                                *
- *                                                                         *
- *   Copyright (C) 2002 Thomas Gleixner (tglx@linutronix.de)               *
+ *   Partially based on drivers/mtd/nand_ids.c from Linux.                 *
+ *   Copyright (C) 2002 Thomas Gleixner <tglx@linutronix.de>               *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
 #include "config.h"
 #endif
 
-#include "replacements.h"
-#include "log.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#include <errno.h>
-
 #include "nand.h"
-#include "flash.h"
 #include "time_support.h"
 #include "fileio.h"
 
-int nand_register_commands(struct command_context_s *cmd_ctx);
-int handle_nand_list_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_probe_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_check_bad_blocks_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_copy_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-int handle_nand_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+static int nand_read_page(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size);
+//static int nand_read_plain(struct nand_device_s *device, uint32_t address, uint8_t *data, uint32_t data_size);
 
-int handle_nand_raw_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
-int nand_read_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
-int nand_read_page(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
-int nand_read_plain(struct nand_device_s *device, u32 address, u8 *data, u32 data_size);
-
-int nand_write_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
-int nand_write_page(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size);
+static int nand_write_page(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size);
 
 /* NAND flash controller
  */
+extern nand_flash_controller_t davinci_nand_controller;
 extern nand_flash_controller_t lpc3180_nand_controller;
-/* extern nand_flash_controller_t s3c2410_nand_controller; */
+extern nand_flash_controller_t orion_nand_controller;
+extern nand_flash_controller_t s3c2410_nand_controller;
+extern nand_flash_controller_t s3c2412_nand_controller;
+extern nand_flash_controller_t s3c2440_nand_controller;
+extern nand_flash_controller_t s3c2443_nand_controller;
+extern nand_flash_controller_t imx31_nand_flash_controller;
+
 /* extern nand_flash_controller_t boundary_scan_nand_controller; */
 
-nand_flash_controller_t *nand_flash_controllers[] =
+static nand_flash_controller_t *nand_flash_controllers[] =
 {
+       &davinci_nand_controller,
        &lpc3180_nand_controller,
-/*     &s3c2410_nand_controller, */
+       &orion_nand_controller,
+       &s3c2410_nand_controller,
+       &s3c2412_nand_controller,
+       &s3c2440_nand_controller,
+       &s3c2443_nand_controller,
+       &imx31_nand_flash_controller,
 /*     &boundary_scan_nand_controller, */
        NULL
 };
 
 /* configured NAND devices and NAND Flash command handler */
-nand_device_t *nand_devices = NULL;
+static nand_device_t *nand_devices = NULL;
 static command_t *nand_cmd;
 
 /*     Chip ID list
@@ -86,8 +74,9 @@ static command_t *nand_cmd;
  *     256     256 Byte page size
  *     512     512 Byte page size
  */
-nand_info_t nand_flash_ids[] =
+static nand_info_t nand_flash_ids[] =
 {
+       /* start "museum" IDs */
        {"NAND 1MiB 5V 8-bit",          0x6e, 256, 1, 0x1000, 0},
        {"NAND 2MiB 5V 8-bit",          0x64, 256, 2, 0x1000, 0},
        {"NAND 4MiB 5V 8-bit",          0x6b, 512, 4, 0x2000, 0},
@@ -103,6 +92,7 @@ nand_info_t nand_flash_ids[] =
        {"NAND 8MiB 3,3V 8-bit",        0xe6, 512, 8, 0x2000, 0},
        {"NAND 8MiB 1,8V 16-bit",       0x49, 512, 8, 0x2000, NAND_BUSWIDTH_16},
        {"NAND 8MiB 3,3V 16-bit",       0x59, 512, 8, 0x2000, NAND_BUSWIDTH_16},
+       /* end "museum" IDs */
 
        {"NAND 16MiB 1,8V 8-bit",       0x33, 512, 16, 0x4000, 0},
        {"NAND 16MiB 3,3V 8-bit",       0x73, 512, 16, 0x4000, 0},
@@ -159,12 +149,12 @@ nand_info_t nand_flash_ids[] =
        {"NAND 2GiB 1,8V 16-bit",       0xB5, 0, 2048, 0, LP_OPTIONS16},
        {"NAND 2GiB 3,3V 16-bit",       0xC5, 0, 2048, 0, LP_OPTIONS16},
 
-       {NULL, 0,}
+       {NULL, 0, 0, 0, 0, 0 }
 };
 
 /* Manufacturer ID list
  */
-nand_manufacturer_t nand_manuf_ids[] =
+static nand_manufacturer_t nand_manuf_ids[] =
 {
        {0x0, "unknown"},
        {NAND_MFR_TOSHIBA, "Toshiba"},
@@ -174,35 +164,71 @@ nand_manufacturer_t nand_manuf_ids[] =
        {NAND_MFR_RENESAS, "Renesas"},
        {NAND_MFR_STMICRO, "ST Micro"},
        {NAND_MFR_HYNIX, "Hynix"},
+       {NAND_MFR_MICRON, "Micron"},
        {0x0, NULL},
 };
 
+/*
+ * Define default oob placement schemes for large and small page devices
+ */
+
+#if 0
+static nand_ecclayout_t nand_oob_8 = {
+       .eccbytes = 3,
+       .eccpos = {0, 1, 2},
+       .oobfree = {
+               {.offset = 3,
+                .length = 2},
+               {.offset = 6,
+                .length = 2}}
+};
+#endif
+
+static nand_ecclayout_t nand_oob_16 = {
+       .eccbytes = 6,
+       .eccpos = {0, 1, 2, 3, 6, 7},
+       .oobfree = {
+               {.offset = 8,
+                . length = 8}}
+};
+
+static nand_ecclayout_t nand_oob_64 = {
+       .eccbytes = 24,
+       .eccpos = {
+                  40, 41, 42, 43, 44, 45, 46, 47,
+                  48, 49, 50, 51, 52, 53, 54, 55,
+                  56, 57, 58, 59, 60, 61, 62, 63},
+       .oobfree = {
+               {.offset = 2,
+                .length = 38}}
+};
+
 /* nand device <nand_controller> [controller options]
  */
-int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        int i;
        int retval;
-               
+
        if (argc < 1)
        {
-               WARNING("incomplete flash device nand configuration");
+               LOG_WARNING("incomplete flash device nand configuration");
                return ERROR_FLASH_BANK_INVALID;
        }
-       
+
        for (i = 0; nand_flash_controllers[i]; i++)
        {
                nand_device_t *p, *c;
-               
+
                if (strcmp(args[0], nand_flash_controllers[i]->name) == 0)
                {
                        /* register flash specific commands */
-                       if (nand_flash_controllers[i]->register_commands(cmd_ctx) != ERROR_OK)
+                       if ((retval = nand_flash_controllers[i]->register_commands(cmd_ctx)) != ERROR_OK)
                        {
-                               ERROR("couldn't register '%s' commands", args[0]);
-                               exit(-1);
+                               LOG_ERROR("couldn't register '%s' commands", args[0]);
+                               return retval;
                        }
-       
+
                        c = malloc(sizeof(nand_device_t));
 
                        c->controller = nand_flash_controllers[i];
@@ -217,11 +243,11 @@ int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, cha
 
                        if ((retval = nand_flash_controllers[i]->nand_device_command(cmd_ctx, cmd, args, argc, c)) != ERROR_OK)
                        {
-                               ERROR("'%s' driver rejected nand flash", c->controller->name);
+                               LOG_ERROR("'%s' driver rejected nand flash", c->controller->name);
                                free(c);
                                return ERROR_OK;
                        }
-                       
+
                        /* put NAND device in linked list */
                        if (nand_devices)
                        {
@@ -234,7 +260,7 @@ int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, cha
                        {
                                nand_devices = c;
                        }
-                       
+
                        return ERROR_OK;
                }
        }
@@ -242,49 +268,22 @@ int handle_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, cha
        /* no valid NAND controller was found (i.e. the configuration option,
         * didn't match one of the compiled-in controllers)
         */
-       ERROR("No valid NAND flash controller found (%s)", args[0]);
-       ERROR("compiled-in NAND flash controllers:");
+       LOG_ERROR("No valid NAND flash controller found (%s)", args[0]);
+       LOG_ERROR("compiled-in NAND flash controllers:");
        for (i = 0; nand_flash_controllers[i]; i++)
        {
-               ERROR("%i: %s", i, nand_flash_controllers[i]->name);
+               LOG_ERROR("%i: %s", i, nand_flash_controllers[i]->name);
        }
-       
+
        return ERROR_OK;
 }
 
 int nand_register_commands(struct command_context_s *cmd_ctx)
 {
-       nand_cmd = register_command(cmd_ctx, NULL, "nand", NULL, COMMAND_ANY, NULL);
-       
+       nand_cmd = register_command(cmd_ctx, NULL, "nand", NULL, COMMAND_ANY, "NAND specific commands");
+
        register_command(cmd_ctx, nand_cmd, "device", handle_nand_device_command, COMMAND_CONFIG, NULL);
-       
-       return ERROR_OK;
-}
 
-int nand_init(struct command_context_s *cmd_ctx)
-{
-       if (nand_devices)
-       {
-               register_command(cmd_ctx, nand_cmd, "list", handle_nand_list_command, COMMAND_EXEC,
-                                                "list configured NAND flash devices");
-               register_command(cmd_ctx, nand_cmd, "info", handle_nand_info_command, COMMAND_EXEC,
-                                                "print info about NAND flash device <num>");
-               register_command(cmd_ctx, nand_cmd, "probe", handle_nand_probe_command, COMMAND_EXEC,
-                                                "identify NAND flash device <num>");
-               register_command(cmd_ctx, nand_cmd, "check_bad_blocks", handle_nand_check_bad_blocks_command, COMMAND_EXEC,
-                                                "check NAND flash device <num> for bad blocks [<first> <last>]");
-               register_command(cmd_ctx, nand_cmd, "erase", handle_nand_erase_command, COMMAND_EXEC,
-                                                "erase blocks on NAND flash device <num> <first> <last>");
-               register_command(cmd_ctx, nand_cmd, "copy", handle_nand_copy_command, COMMAND_EXEC,
-                                                "copy from NAND flash device <num> <offset> <length> <ram-address>");
-               register_command(cmd_ctx, nand_cmd, "dump", handle_nand_dump_command, COMMAND_EXEC,
-                                                "dump from NAND flash device <num> <filename> <offset> <size> [options]");
-               register_command(cmd_ctx, nand_cmd, "write", handle_nand_write_command, COMMAND_EXEC,
-                                                "write to NAND flash device <num> <filename> <offset> [options]");
-               register_command(cmd_ctx, nand_cmd, "raw_access", handle_nand_raw_access_command, COMMAND_EXEC,
-                                                "raw access to NAND flash device <num> ['enable'|'disable']");
-       }
-       
        return ERROR_OK;
 }
 
@@ -300,60 +299,71 @@ nand_device_t *get_nand_device_by_num(int num)
                        return p;
                }
        }
-       
+
        return NULL;
 }
 
-int nand_build_bbt(struct nand_device_s *device, int first, int last)
+int nand_command_get_device_by_num(struct command_context_s *cmd_ctx,
+               const char *str, nand_device_t **device)
 {
-       u32 page = 0x0;
+       unsigned num;
+       COMMAND_PARSE_NUMBER(uint, str, num);
+       *device = get_nand_device_by_num(num);
+       if (!*device) {
+               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", str);
+               return ERROR_INVALID_ARGUMENTS;
+       }
+       return ERROR_OK;
+}
+
+static int nand_build_bbt(struct nand_device_s *device, int first, int last)
+{
+       uint32_t page = 0x0;
        int i;
-       u8 *oob;
-       
-       oob = malloc(6);
-       
+       uint8_t oob[6];
+
        if ((first < 0) || (first >= device->num_blocks))
                first = 0;
-       
+
        if ((last >= device->num_blocks) || (last == -1))
                last = device->num_blocks - 1;
-       
+
        for (i = first; i < last; i++)
        {
                nand_read_page(device, page, NULL, 0, oob, 6);
-               
+
                if (((device->device->options & NAND_BUSWIDTH_16) && ((oob[0] & oob[1]) != 0xff))
                        || (((device->page_size == 512) && (oob[5] != 0xff)) ||
                                ((device->page_size == 2048) && (oob[0] != 0xff))))
                {
-                       WARNING("invalid block: %i", i);
+                       LOG_WARNING("bad block: %i", i);
                        device->blocks[i].is_bad = 1;
                }
                else
                {
                        device->blocks[i].is_bad = 0;
                }
-               
+
                page += (device->erase_size / device->page_size);
        }
-       
+
        return ERROR_OK;
 }
 
-int nand_read_status(struct nand_device_s *device, u8 *status)
+int nand_read_status(struct nand_device_s *device, uint8_t *status)
 {
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-               
+
        /* Send read status command */
        device->controller->command(device, NAND_CMD_STATUS);
-       
-       usleep(1000);
-       
+
+       alive_sleep(1);
+
        /* read status */
        if (device->device->options & NAND_BUSWIDTH_16)
        {
-               u16 data;
+               uint16_t data;
                device->controller->read_data(device, &data);
                *status = data & 0xff;
        }
@@ -361,49 +371,71 @@ int nand_read_status(struct nand_device_s *device, u8 *status)
        {
                device->controller->read_data(device, status);
        }
-                       
+
        return ERROR_OK;
 }
 
+static int nand_poll_ready(struct nand_device_s *device, int timeout)
+{
+       uint8_t status;
+
+       device->controller->command(device, NAND_CMD_STATUS);
+       do {
+               if (device->device->options & NAND_BUSWIDTH_16) {
+                       uint16_t data;
+                       device->controller->read_data(device, &data);
+                       status = data & 0xff;
+               } else {
+                       device->controller->read_data(device, &status);
+               }
+               if (status & NAND_STATUS_READY)
+                       break;
+               alive_sleep(1);
+       } while (timeout--);
+
+       return (status & NAND_STATUS_READY) != 0;
+}
+
 int nand_probe(struct nand_device_s *device)
 {
-       u8 manufacturer_id, device_id;
+       uint8_t manufacturer_id, device_id;
+       uint8_t id_buff[6];
        int retval;
        int i;
 
        /* clear device data */
        device->device = NULL;
        device->manufacturer = NULL;
-       
+
        /* clear device parameters */
        device->bus_width = 0;
        device->address_cycles = 0;
        device->page_size = 0;
        device->erase_size = 0;
-       
+
        /* initialize controller (device parameters are zero, use controller default) */
        if ((retval = device->controller->init(device) != ERROR_OK))
        {
                switch (retval)
                {
                        case ERROR_NAND_OPERATION_FAILED:
-                               DEBUG("controller initialization failed");
+                               LOG_DEBUG("controller initialization failed");
                                return ERROR_NAND_OPERATION_FAILED;
                        case ERROR_NAND_OPERATION_NOT_SUPPORTED:
-                               ERROR("BUG: controller reported that it doesn't support default parameters");
+                               LOG_ERROR("BUG: controller reported that it doesn't support default parameters");
                                return ERROR_NAND_OPERATION_FAILED;
                        default:
-                               ERROR("BUG: unknown controller initialization failure");
+                               LOG_ERROR("BUG: unknown controller initialization failure");
                                return ERROR_NAND_OPERATION_FAILED;
                }
        }
-       
+
        device->controller->command(device, NAND_CMD_RESET);
        device->controller->reset(device);
 
        device->controller->command(device, NAND_CMD_READID);
        device->controller->address(device, 0x0);
-       
+
        if (device->bus_width == 8)
        {
                device->controller->read_data(device, &manufacturer_id);
@@ -411,13 +443,13 @@ int nand_probe(struct nand_device_s *device)
        }
        else
        {
-               u16 data_buf;
+               uint16_t data_buf;
                device->controller->read_data(device, &data_buf);
                manufacturer_id = data_buf & 0xff;
                device->controller->read_data(device, &data_buf);
                device_id = data_buf & 0xff;
        }
-               
+
        for (i = 0; nand_flash_ids[i].name; i++)
        {
                if (nand_flash_ids[i].id == device_id)
@@ -426,7 +458,7 @@ int nand_probe(struct nand_device_s *device)
                        break;
                }
        }
-       
+
        for (i = 0; nand_manuf_ids[i].name; i++)
        {
                if (nand_manuf_ids[i].id == manufacturer_id)
@@ -435,46 +467,70 @@ int nand_probe(struct nand_device_s *device)
                        break;
                }
        }
-       
+
        if (!device->manufacturer)
        {
                device->manufacturer = &nand_manuf_ids[0];
                device->manufacturer->id = manufacturer_id;
        }
-       
+
        if (!device->device)
        {
-               ERROR("unknown NAND flash device found, manufacturer id: 0x%2.2x device id: 0x%2.2x",
+               LOG_ERROR("unknown NAND flash device found, manufacturer id: 0x%2.2x device id: 0x%2.2x",
                        manufacturer_id, device_id);
                return ERROR_NAND_OPERATION_FAILED;
        }
-       
-       DEBUG("found %s (%s)", device->device->name, device->manufacturer->name);
-       
+
+       LOG_DEBUG("found %s (%s)", device->device->name, device->manufacturer->name);
+
        /* initialize device parameters */
-       
-       /* bus width */ 
+
+       /* bus width */
        if (device->device->options & NAND_BUSWIDTH_16)
                device->bus_width = 16;
        else
                device->bus_width = 8;
-               
+
+       /* Do we need extended device probe information? */
+       if (device->device->page_size == 0 ||
+           device->device->erase_size == 0)
+       {
+               if (device->bus_width == 8)
+               {
+                       device->controller->read_data(device, id_buff + 3);
+                       device->controller->read_data(device, id_buff + 4);
+                       device->controller->read_data(device, id_buff + 5);
+               }
+               else
+               {
+                       uint16_t data_buf;
+
+                       device->controller->read_data(device, &data_buf);
+                       id_buff[3] = data_buf;
+
+                       device->controller->read_data(device, &data_buf);
+                       id_buff[4] = data_buf;
+
+                       device->controller->read_data(device, &data_buf);
+                       id_buff[5] = data_buf >> 8;
+               }
+       }
+
        /* page size */
        if (device->device->page_size == 0)
        {
-               /* TODO: support reading extended chip id to determine page size */
-               return ERROR_NAND_OPERATION_FAILED;
+               device->page_size = 1 << (10 + (id_buff[4] & 3));
        }
        else if (device->device->page_size == 256)
        {
-               ERROR("NAND flashes with 256 byte pagesize are not supported");
+               LOG_ERROR("NAND flashes with 256 byte pagesize are not supported");
                return ERROR_NAND_OPERATION_FAILED;
        }
        else
        {
                device->page_size = device->device->page_size;
        }
-       
+
        /* number of address cycles */
        if (device->page_size <= 512)
        {
@@ -485,7 +541,7 @@ int nand_probe(struct nand_device_s *device)
                        device->address_cycles = 4;
                else
                {
-                       ERROR("BUG: small page NAND device with more than 8 GiB encountered");
+                       LOG_ERROR("BUG: small page NAND device with more than 8 GiB encountered");
                        device->address_cycles = 5;
                }
        }
@@ -498,42 +554,55 @@ int nand_probe(struct nand_device_s *device)
                        device->address_cycles = 5;
                else
                {
-                       ERROR("BUG: small page NAND device with more than 32 GiB encountered");
+                       LOG_ERROR("BUG: large page NAND device with more than 32 GiB encountered");
                        device->address_cycles = 6;
                }
        }
-       
+
        /* erase size */
        if (device->device->erase_size == 0)
        {
-               /* TODO: support reading extended chip id to determine erase size */
+               switch ((id_buff[4] >> 4) & 3) {
+               case 0:
+                       device->erase_size = 64 << 10;
+                       break;
+               case 1:
+                       device->erase_size = 128 << 10;
+                       break;
+               case 2:
+                       device->erase_size = 256 << 10;
+                       break;
+               case 3:
+                       device->erase_size =512 << 10;
+                       break;
+               }
        }
        else
        {
                device->erase_size = device->device->erase_size;
        }
-       
+
        /* initialize controller, but leave parameters at the controllers default */
        if ((retval = device->controller->init(device) != ERROR_OK))
        {
                switch (retval)
                {
                        case ERROR_NAND_OPERATION_FAILED:
-                               DEBUG("controller initialization failed");
+                               LOG_DEBUG("controller initialization failed");
                                return ERROR_NAND_OPERATION_FAILED;
                        case ERROR_NAND_OPERATION_NOT_SUPPORTED:
-                               ERROR("controller doesn't support requested parameters (buswidth: %i, address cycles: %i, page size: %i)",
+                               LOG_ERROR("controller doesn't support requested parameters (buswidth: %i, address cycles: %i, page size: %i)",
                                        device->bus_width, device->address_cycles, device->page_size);
                                return ERROR_NAND_OPERATION_FAILED;
                        default:
-                               ERROR("BUG: unknown controller initialization failure");
+                               LOG_ERROR("BUG: unknown controller initialization failure");
                                return ERROR_NAND_OPERATION_FAILED;
                }
        }
-       
+
        device->num_blocks = (device->device->chip_size * 1024) / (device->erase_size / 1024);
        device->blocks = malloc(sizeof(nand_block_t) * device->num_blocks);
-       
+
        for (i = 0; i < device->num_blocks; i++)
        {
                device->blocks[i].size = device->erase_size;
@@ -541,23 +610,23 @@ int nand_probe(struct nand_device_s *device)
                device->blocks[i].is_erased = -1;
                device->blocks[i].is_bad = -1;
        }
-       
+
        return ERROR_OK;
 }
 
-int nand_erase(struct nand_device_s *device, int first_block, int last_block)
+static int nand_erase(struct nand_device_s *device, int first_block, int last_block)
 {
        int i;
-       u32 page;
-       u8 status;
+       uint32_t page;
+       uint8_t status;
        int retval;
-       
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-       
+
        if ((first_block < 0) || (last_block > device->num_blocks))
                return ERROR_INVALID_ARGUMENTS;
-       
+
        /* make sure we know if a block is bad before erasing it */
        for (i = first_block; i <= last_block; i++)
        {
@@ -567,25 +636,25 @@ int nand_erase(struct nand_device_s *device, int first_block, int last_block)
                        break;
                }
        }
-       
+
        for (i = first_block; i <= last_block; i++)
        {
                /* Send erase setup command */
                device->controller->command(device, NAND_CMD_ERASE1);
-               
+
                page = i * (device->erase_size / device->page_size);
-               
+
                /* Send page address */
                if (device->page_size <= 512)
                {
                        /* row */
                        device->controller->address(device, page & 0xff);
                        device->controller->address(device, (page >> 8) & 0xff);
-                       
+
                        /* 3rd cycle only on devices with more than 32 MiB */
                        if (device->address_cycles >= 4)
                                device->controller->address(device, (page >> 16) & 0xff);
-       
+
                        /* 4th cycle only on devices with more than 8 GiB */
                        if (device->address_cycles >= 5)
                                device->controller->address(device, (page >> 24) & 0xff);
@@ -595,137 +664,152 @@ int nand_erase(struct nand_device_s *device, int first_block, int last_block)
                        /* row */
                        device->controller->address(device, page & 0xff);
                        device->controller->address(device, (page >> 8) & 0xff);
-       
+
                        /* 3rd cycle only on devices with more than 128 MiB */
                        if (device->address_cycles >= 5)
                                device->controller->address(device, (page >> 16) & 0xff);
                }
-               
+
                /* Send erase confirm command */
                device->controller->command(device, NAND_CMD_ERASE2);
-               
-               if (!device->controller->nand_ready(device, 1000))
-               {
-                       ERROR("timeout waiting for NAND flash block erase to complete");
+
+               retval = device->controller->nand_ready ?
+                               device->controller->nand_ready(device, 1000) :
+                               nand_poll_ready(device, 1000);
+               if (!retval) {
+                       LOG_ERROR("timeout waiting for NAND flash block erase to complete");
                        return ERROR_NAND_OPERATION_TIMEOUT;
                }
-               
+
                if ((retval = nand_read_status(device, &status)) != ERROR_OK)
                {
-                       ERROR("couldn't read status");
+                       LOG_ERROR("couldn't read status");
                        return ERROR_NAND_OPERATION_FAILED;
                }
-               
+
                if (status & 0x1)
                {
-                       ERROR("erase operation didn't pass, status: 0x%2.2x", status);
-                       return ERROR_NAND_OPERATION_FAILED;
+                       LOG_ERROR("didn't erase %sblock %d; status: 0x%2.2x",
+                                       (device->blocks[i].is_bad == 1)
+                                               ? "bad " : "",
+                                       i, status);
+                       /* continue; other blocks might still be erasable */
                }
+
+               device->blocks[i].is_erased = 1;
        }
-       
+
        return ERROR_OK;
 }
 
-int nand_read_plain(struct nand_device_s *device, u32 address, u8 *data, u32 data_size)
+#if 0
+static int nand_read_plain(struct nand_device_s *device, uint32_t address, uint8_t *data, uint32_t data_size)
 {
-       u8 *page;
-       
+       uint8_t *page;
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-               
+
        if (address % device->page_size)
        {
-               ERROR("reads need to be page aligned");
+               LOG_ERROR("reads need to be page aligned");
                return ERROR_NAND_OPERATION_FAILED;
        }
-       
+
        page = malloc(device->page_size);
-       
-       while (data_size > 0 )
+
+       while (data_size > 0)
        {
-               u32 thisrun_size = (data_size > device->page_size) ? device->page_size : data_size;
-               u32 page_address;
-               
-               
+               uint32_t thisrun_size = (data_size > device->page_size) ? device->page_size : data_size;
+               uint32_t page_address;
+
+
                page_address = address / device->page_size;
-               
+
                nand_read_page(device, page_address, page, device->page_size, NULL, 0);
 
                memcpy(data, page, thisrun_size);
-               
+
                address += thisrun_size;
                data += thisrun_size;
                data_size -= thisrun_size;
        }
-       
+
        free(page);
-       
+
        return ERROR_OK;
 }
 
-int nand_write_plain(struct nand_device_s *device, u32 address, u8 *data, u32 data_size)
+static int nand_write_plain(struct nand_device_s *device, uint32_t address, uint8_t *data, uint32_t data_size)
 {
-       u8 *page;
-       
+       uint8_t *page;
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-               
+
        if (address % device->page_size)
        {
-               ERROR("writes need to be page aligned");
+               LOG_ERROR("writes need to be page aligned");
                return ERROR_NAND_OPERATION_FAILED;
        }
-       
+
        page = malloc(device->page_size);
-       
-       while (data_size > 0 )
+
+       while (data_size > 0)
        {
-               u32 thisrun_size = (data_size > device->page_size) ? device->page_size : data_size;
-               u32 page_address;
-               
+               uint32_t thisrun_size = (data_size > device->page_size) ? device->page_size : data_size;
+               uint32_t page_address;
+
                memset(page, 0xff, device->page_size);
                memcpy(page, data, thisrun_size);
-               
+
                page_address = address / device->page_size;
-               
+
                nand_write_page(device, page_address, page, device->page_size, NULL, 0);
-               
+
                address += thisrun_size;
                data += thisrun_size;
                data_size -= thisrun_size;
        }
-       
+
        free(page);
-       
+
        return ERROR_OK;
 }
+#endif
 
-int nand_write_page(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size)
+int nand_write_page(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
 {
+       uint32_t block;
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-               
-       if (device->use_raw)
+
+       block = page / (device->erase_size / device->page_size);
+       if (device->blocks[block].is_erased == 1)
+               device->blocks[block].is_erased = 0;
+
+       if (device->use_raw || device->controller->write_page == NULL)
                return nand_write_page_raw(device, page, data, data_size, oob, oob_size);
        else
                return device->controller->write_page(device, page, data, data_size, oob, oob_size);
 }
 
-int nand_read_page(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size)
+static int nand_read_page(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
 {
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
-               
-       if (device->use_raw)
+
+       if (device->use_raw || device->controller->read_page == NULL)
                return nand_read_page_raw(device, page, data, data_size, oob, oob_size);
        else
                return device->controller->read_page(device, page, data, data_size, oob, oob_size);
 }
 
-int nand_read_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size)
+int nand_read_page_raw(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
 {
-       int i;
-       
+       uint32_t i;
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
 
@@ -736,14 +820,14 @@ int nand_read_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 dat
                        device->controller->command(device, NAND_CMD_READ0);
                else
                        device->controller->command(device, NAND_CMD_READOOB);
-               
+
                /* column (always 0, we start at the beginning of a page/OOB area) */
                device->controller->address(device, 0x0);
-               
+
                /* row */
                device->controller->address(device, page & 0xff);
                device->controller->address(device, (page >> 8) & 0xff);
-               
+
                /* 4th cycle only on devices with more than 32 MiB */
                if (device->address_cycles >= 4)
                        device->controller->address(device, (page >> 16) & 0xff);
@@ -756,13 +840,16 @@ int nand_read_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 dat
        {
                /* large page device */
                device->controller->command(device, NAND_CMD_READ0);
-               
+
                /* column (0 when we start at the beginning of a page,
                 * or 2048 for the beginning of OOB area)
                 */
                device->controller->address(device, 0x0);
-               device->controller->address(device, 0x8);
-               
+               if (data)
+                       device->controller->address(device, 0x0);
+               else
+                       device->controller->address(device, 0x8);
+
                /* row */
                device->controller->address(device, page & 0xff);
                device->controller->address(device, (page >> 8) & 0xff);
@@ -774,71 +861,85 @@ int nand_read_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 dat
                /* large page devices need a start command */
                device->controller->command(device, NAND_CMD_READSTART);
        }
-       
-       if (!device->controller->nand_ready(device, 100))
-               return ERROR_NAND_OPERATION_TIMEOUT;
-       
+
+       if (device->controller->nand_ready) {
+               if (!device->controller->nand_ready(device, 100))
+                       return ERROR_NAND_OPERATION_TIMEOUT;
+       } else {
+               alive_sleep(1);
+       }
+
        if (data)
        {
-               for (i = 0; i < data_size;)
+               if (device->controller->read_block_data != NULL)
+                       (device->controller->read_block_data)(device, data, data_size);
+               else
                {
-                       if (device->device->options & NAND_BUSWIDTH_16)
-                       {
-                               device->controller->read_data(device, data);
-                               data += 2;
-                               i += 2;
-                       }
-                       else
+                       for (i = 0; i < data_size;)
                        {
-                               device->controller->read_data(device, data);
-                               data += 1;
-                               i += 1;
+                               if (device->device->options & NAND_BUSWIDTH_16)
+                               {
+                                       device->controller->read_data(device, data);
+                                       data += 2;
+                                       i += 2;
+                               }
+                               else
+                               {
+                                       device->controller->read_data(device, data);
+                                       data += 1;
+                                       i += 1;
+                               }
                        }
                }
        }
-       
+
        if (oob)
        {
-               for (i = 0; i < oob_size;)
+               if (device->controller->read_block_data != NULL)
+                       (device->controller->read_block_data)(device, oob, oob_size);
+               else
                {
-                       if (device->device->options & NAND_BUSWIDTH_16)
+                       for (i = 0; i < oob_size;)
                        {
-                               device->controller->read_data(device, oob);
-                               oob += 2;
-                               i += 2;
-                       }
-                       else
-                       {
-                               device->controller->read_data(device, oob);
-                               oob += 1;
-                               i += 1;
+                               if (device->device->options & NAND_BUSWIDTH_16)
+                               {
+                                       device->controller->read_data(device, oob);
+                                       oob += 2;
+                                       i += 2;
+                               }
+                               else
+                               {
+                                       device->controller->read_data(device, oob);
+                                       oob += 1;
+                                       i += 1;
+                               }
                        }
                }
        }
-       
-       return ERROR_OK;        
+
+       return ERROR_OK;
 }
 
-int nand_write_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 data_size, u8 *oob, u32 oob_size)
+int nand_write_page_raw(struct nand_device_s *device, uint32_t page, uint8_t *data, uint32_t data_size, uint8_t *oob, uint32_t oob_size)
 {
-       int i;
+       uint32_t i;
        int retval;
-       u8 status;
-       
+       uint8_t status;
+
        if (!device->device)
                return ERROR_NAND_DEVICE_NOT_PROBED;
 
        device->controller->command(device, NAND_CMD_SEQIN);
-       
+
        if (device->page_size <= 512)
        {
                /* column (always 0, we start at the beginning of a page/OOB area) */
                device->controller->address(device, 0x0);
-               
+
                /* row */
                device->controller->address(device, page & 0xff);
                device->controller->address(device, (page >> 8) & 0xff);
-               
+
                /* 4th cycle only on devices with more than 32 MiB */
                if (device->address_cycles >= 4)
                        device->controller->address(device, (page >> 16) & 0xff);
@@ -853,8 +954,11 @@ int nand_write_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 da
                 * or 2048 for the beginning of OOB area)
                 */
                device->controller->address(device, 0x0);
-               device->controller->address(device, 0x8);
-               
+               if (data)
+                       device->controller->address(device, 0x0);
+               else
+                       device->controller->address(device, 0x8);
+
                /* row */
                device->controller->address(device, page & 0xff);
                device->controller->address(device, (page >> 8) & 0xff);
@@ -863,616 +967,675 @@ int nand_write_page_raw(struct nand_device_s *device, u32 page, u8 *data, u32 da
                if (device->address_cycles >= 5)
                        device->controller->address(device, (page >> 16) & 0xff);
        }
-       
+
        if (data)
        {
-               for (i = 0; i < data_size;)
+               if (device->controller->write_block_data != NULL)
+                       (device->controller->write_block_data)(device, data, data_size);
+               else
                {
-                       if (device->device->options & NAND_BUSWIDTH_16)
-                       {
-                               u16 data_buf = le_to_h_u16(data);
-                               device->controller->write_data(device, data_buf);
-                               data += 2;
-                               i += 2;
-                       }
-                       else
+                       for (i = 0; i < data_size;)
                        {
-                               device->controller->write_data(device, *data);
-                               data += 1;
-                               i += 1;
+                               if (device->device->options & NAND_BUSWIDTH_16)
+                               {
+                                       uint16_t data_buf = le_to_h_u16(data);
+                                       device->controller->write_data(device, data_buf);
+                                       data += 2;
+                                       i += 2;
+                               }
+                               else
+                               {
+                                       device->controller->write_data(device, *data);
+                                       data += 1;
+                                       i += 1;
+                               }
                        }
                }
        }
-       
+
        if (oob)
        {
-               for (i = 0; i < oob_size;)
+               if (device->controller->write_block_data != NULL)
+                       (device->controller->write_block_data)(device, oob, oob_size);
+               else
                {
-                       if (device->device->options & NAND_BUSWIDTH_16)
-                       {
-                               u16 oob_buf = le_to_h_u16(data);
-                               device->controller->write_data(device, oob_buf);
-                               oob += 2;
-                               i += 2;
-                       }
-                       else
+                       for (i = 0; i < oob_size;)
                        {
-                               device->controller->write_data(device, *oob);
-                               oob += 1;
-                               i += 1;
+                               if (device->device->options & NAND_BUSWIDTH_16)
+                               {
+                                       uint16_t oob_buf = le_to_h_u16(data);
+                                       device->controller->write_data(device, oob_buf);
+                                       oob += 2;
+                                       i += 2;
+                               }
+                               else
+                               {
+                                       device->controller->write_data(device, *oob);
+                                       oob += 1;
+                                       i += 1;
+                               }
                        }
                }
        }
-       
+
        device->controller->command(device, NAND_CMD_PAGEPROG);
-       
-       if (!device->controller->nand_ready(device, 100))
+
+       retval = device->controller->nand_ready ?
+                       device->controller->nand_ready(device, 100) :
+                       nand_poll_ready(device, 100);
+       if (!retval)
                return ERROR_NAND_OPERATION_TIMEOUT;
-       
+
        if ((retval = nand_read_status(device, &status)) != ERROR_OK)
        {
-               ERROR("couldn't read status");
+               LOG_ERROR("couldn't read status");
                return ERROR_NAND_OPERATION_FAILED;
        }
-               
+
        if (status & NAND_STATUS_FAIL)
        {
-               ERROR("write operation didn't pass, status: 0x%2.2x", status);
+               LOG_ERROR("write operation didn't pass, status: 0x%2.2x", status);
                return ERROR_NAND_OPERATION_FAILED;
        }
-       
-       return ERROR_OK;        
+
+       return ERROR_OK;
 }
 
 int handle_nand_list_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        nand_device_t *p;
-       int i = 0;
-       
+       int i;
+
        if (!nand_devices)
        {
                command_print(cmd_ctx, "no NAND flash devices configured");
                return ERROR_OK;
        }
-       
-       for (p = nand_devices; p; p = p->next)
+
+       for (p = nand_devices, i = 0; p; p = p->next, i++)
        {
                if (p->device)
-                       command_print(cmd_ctx, "#%i: %s (%s) pagesize: %i, buswidth: %i, erasesize: %i",
-                               i++, p->device->name, p->manufacturer->name, p->page_size, p->bus_width, p->erase_size);
+                       command_print(cmd_ctx, "#%i: %s (%s) "
+                               "pagesize: %i, buswidth: %i,\n\t"
+                               "blocksize: %i, blocks: %i",
+                               i, p->device->name, p->manufacturer->name,
+                               p->page_size, p->bus_width,
+                               p->erase_size, p->num_blocks);
                else
-                       command_print(cmd_ctx, "#%i: not probed");
+                       command_print(cmd_ctx, "#%i: not probed", i);
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       nand_device_t *p;
        int i = 0;
        int j = 0;
        int first = -1;
        int last = -1;
-               
-       if ((argc < 1) || (argc > 3))
-       {
-               command_print(cmd_ctx, "usage: nand info <num> [<first> <last>]");
+
+       nand_device_t *p;
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       switch (argc) {
+       default:
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       case 1:
+               first = 0;
+               last = INT32_MAX;
+               break;
+       case 2:
+               COMMAND_PARSE_NUMBER(int, args[1], i);
+               first = last = i;
+               i = 0;
+               break;
+       case 3:
+               COMMAND_PARSE_NUMBER(int, args[1], first);
+               COMMAND_PARSE_NUMBER(int, args[2], last);
+               break;
+       }
+
+       if (NULL == p->device)
+       {
+               command_print(cmd_ctx, "#%s: not probed", args[0]);
                return ERROR_OK;
        }
-       
-       if (argc == 2)
-       {
-               first = last = strtoul(args[1], NULL, 0);
-       }
-       else if (argc == 3)
-       {
-               first = strtoul(args[1], NULL, 0);
-               last = strtoul(args[2], NULL, 0);
-       }
-               
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       if (first >= p->num_blocks)
+               first = p->num_blocks - 1;
+
+       if (last >= p->num_blocks)
+               last = p->num_blocks - 1;
+
+       command_print(cmd_ctx, "#%i: %s (%s) pagesize: %i, buswidth: %i, erasesize: %i",
+               i++, p->device->name, p->manufacturer->name, p->page_size, p->bus_width, p->erase_size);
+
+       for (j = first; j <= last; j++)
        {
-               if (p->device)
-               {
-                       if (first >= p->num_blocks)
-                               first = p->num_blocks - 1;
-                       
-                       if (last >= p->num_blocks)
-                               last = p->num_blocks - 1;
-                       
-                       command_print(cmd_ctx, "#%i: %s (%s) pagesize: %i, buswidth: %i, erasesize: %i",
-                               i++, p->device->name, p->manufacturer->name, p->page_size, p->bus_width, p->erase_size);
-                       
-                       for (j = first; j <= last; j++)
-                       {
-                               char *erase_state, *bad_state;
-                               
-                               if (p->blocks[j].is_erased == 0)
-                                       erase_state = "not erased";
-                               else if (p->blocks[j].is_erased == 1)
-                                       erase_state = "erased";
-                               else
-                                       erase_state = "erase state unknown";
-                               
-                               if (p->blocks[j].is_bad == 0)
-                                       bad_state = "";
-                               else if (p->blocks[j].is_bad == 1)
-                                       bad_state = " (marked bad)";
-                               else
-                                       bad_state = " (block condition unknown)";
+               char *erase_state, *bad_state;
 
-                               command_print(cmd_ctx, "\t#%i: 0x%8.8x (0x%xkB) %s%s",
-                                                       j, p->blocks[j].offset, p->blocks[j].size / 1024,
-                                                       erase_state, bad_state);
-                       }
-               }
+               if (p->blocks[j].is_erased == 0)
+                       erase_state = "not erased";
+               else if (p->blocks[j].is_erased == 1)
+                       erase_state = "erased";
                else
-               {
-                       command_print(cmd_ctx, "#%i: not probed");
-               }
+                       erase_state = "erase state unknown";
+
+               if (p->blocks[j].is_bad == 0)
+                       bad_state = "";
+               else if (p->blocks[j].is_bad == 1)
+                       bad_state = " (marked bad)";
+               else
+                       bad_state = " (block condition unknown)";
+
+               command_print(cmd_ctx,
+                             "\t#%i: 0x%8.8" PRIx32 " (%" PRId32 "kB) %s%s",
+                             j,
+                             p->blocks[j].offset,
+                             p->blocks[j].size / 1024,
+                             erase_state,
+                             bad_state);
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_probe_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_probe_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       nand_device_t *p;
-       int retval;
-               
        if (argc != 1)
        {
-               command_print(cmd_ctx, "usage: nand probe <num>");
-               return ERROR_OK;
+               return ERROR_COMMAND_SYNTAX_ERROR;
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       nand_device_t *p;
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       if ((retval = nand_probe(p)) == ERROR_OK)
        {
-               if ((retval = nand_probe(p)) == ERROR_OK)
-               {
-                       command_print(cmd_ctx, "NAND flash device '%s' found", p->device->name);
-               }
-               else if (retval == ERROR_NAND_OPERATION_FAILED)
-               {
-                       command_print(cmd_ctx, "probing failed for NAND flash device");
-               }
-               else
-               {
-                       command_print(cmd_ctx, "unknown error when probing NAND flash device");
-               }
+               command_print(cmd_ctx, "NAND flash device '%s' found", p->device->name);
+       }
+       else if (retval == ERROR_NAND_OPERATION_FAILED)
+       {
+               command_print(cmd_ctx, "probing failed for NAND flash device");
        }
        else
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               command_print(cmd_ctx, "unknown error when probing NAND flash device");
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_erase_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
+       if (argc != 1 && argc != 3)
+       {
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
+       }
+
        nand_device_t *p;
-       int retval;
-               
-       if (argc != 3)
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       unsigned long offset;
+       unsigned long length;
+
+       /* erase specified part of the chip; or else everything */
+       if (argc == 3) {
+               unsigned long size = p->erase_size * p->num_blocks;
+
+               COMMAND_PARSE_NUMBER(ulong, args[1], offset);
+               if ((offset % p->erase_size) != 0 || offset >= size)
+                       return ERROR_INVALID_ARGUMENTS;
+
+               COMMAND_PARSE_NUMBER(ulong, args[2], length);
+               if ((length == 0) || (length % p->erase_size) != 0
+                               || (length + offset) > size)
+                       return ERROR_INVALID_ARGUMENTS;
+
+               offset /= p->erase_size;
+               length /= p->erase_size;
+       } else {
+               offset = 0;
+               length = p->num_blocks;
+       }
+
+       retval = nand_erase(p, offset, offset + length - 1);
+       if (retval == ERROR_OK)
        {
-               command_print(cmd_ctx, "usage: nand erase <num> <first> <last>");
-               return ERROR_OK;
+               command_print(cmd_ctx, "erased blocks %lu to %lu "
+                               "on NAND flash device #%s '%s'",
+                               offset, offset + length,
+                               args[0], p->device->name);
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+       else if (retval == ERROR_NAND_OPERATION_FAILED)
        {
-               int first = strtoul(args[1], NULL, 0);
-               int last = strtoul(args[2], NULL, 0);
-               
-               if ((retval = nand_erase(p, first, last)) == ERROR_OK)
-               {
-                       command_print(cmd_ctx, "successfully erased blocks %i to %i on NAND flash device '%s'", first, last, p->device->name);
-               }
-               else if (retval == ERROR_NAND_OPERATION_FAILED)
-               {
-                       command_print(cmd_ctx, "erase failed");
-               }
-               else
-               {
-                       command_print(cmd_ctx, "unknown error when erasing NAND flash device");
-               }
+               command_print(cmd_ctx, "erase failed");
        }
        else
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               command_print(cmd_ctx, "unknown error when erasing NAND flash device");
        }
-       
+
        return ERROR_OK;
 }
 
 int handle_nand_check_bad_blocks_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       nand_device_t *p;
-       int retval;
        int first = -1;
        int last = -1;
-               
+
        if ((argc < 1) || (argc > 3) || (argc == 2))
        {
-               command_print(cmd_ctx, "usage: nand check_bad_blocks <num> [<first> <last>]");
-               return ERROR_OK;
+               return ERROR_COMMAND_SYNTAX_ERROR;
+
        }
-       
+
+       nand_device_t *p;
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
        if (argc == 3)
        {
-               first = strtoul(args[1], NULL, 0);
-               last = strtoul(args[2], NULL, 0);
+               unsigned long offset;
+               unsigned long length;
+
+               COMMAND_PARSE_NUMBER(ulong, args[1], offset);
+               if (offset % p->erase_size)
+                       return ERROR_INVALID_ARGUMENTS;
+               offset /= p->erase_size;
+
+               COMMAND_PARSE_NUMBER(ulong, args[2], length);
+               if (length % p->erase_size)
+                       return ERROR_INVALID_ARGUMENTS;
+
+               length -= 1;
+               length /= p->erase_size;
+
+               first = offset;
+               last = offset + length;
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       retval = nand_build_bbt(p, first, last);
+       if (retval == ERROR_OK)
        {
-               if ((retval = nand_build_bbt(p, first, last)) == ERROR_OK)
-               {
-                       command_print(cmd_ctx, "checked NAND flash device for bad blocks, use \"nand info\" command to list blocks", p->device->name);
-               }
-               else if (retval == ERROR_NAND_OPERATION_FAILED)
-               {
-                       command_print(cmd_ctx, "error when checking for bad blocks on NAND flash device");
-               }
-               else
-               {
-                       command_print(cmd_ctx, "unknown error when checking for bad blocks on NAND flash device");
-               }
+               command_print(cmd_ctx, "checked NAND flash device for bad blocks, "
+                               "use \"nand info\" command to list blocks");
+       }
+       else if (retval == ERROR_NAND_OPERATION_FAILED)
+       {
+               command_print(cmd_ctx, "error when checking for bad blocks on "
+                               "NAND flash device");
        }
        else
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               command_print(cmd_ctx, "unknown error when checking for bad "
+                               "blocks on NAND flash device");
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_copy_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
+       uint32_t offset;
+       uint32_t binary_size;
+       uint32_t buf_cnt;
+       enum oob_formats oob_format = NAND_OOB_NONE;
+
+       fileio_t fileio;
+
+
+       if (argc < 3)
+       {
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
+
        nand_device_t *p;
-               
-       if (argc != 4)
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       uint8_t *page = NULL;
+       uint32_t page_size = 0;
+       uint8_t *oob = NULL;
+       uint32_t oob_size = 0;
+       const int *eccpos = NULL;
+
+       COMMAND_PARSE_NUMBER(u32, args[2], offset);
+
+       if (argc > 3)
        {
-               command_print(cmd_ctx, "usage: nand copy <num> <offset> <length> <ram-address>");
-               return ERROR_OK;
+               int i;
+               for (i = 3; i < argc; i++)
+               {
+                       if (!strcmp(args[i], "oob_raw"))
+                               oob_format |= NAND_OOB_RAW;
+                       else if (!strcmp(args[i], "oob_only"))
+                               oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY;
+                       else if (!strcmp(args[i], "oob_softecc"))
+                               oob_format |= NAND_OOB_SW_ECC;
+                       else if (!strcmp(args[i], "oob_softecc_kw"))
+                               oob_format |= NAND_OOB_SW_ECC_KW;
+                       else
+                       {
+                               command_print(cmd_ctx, "unknown option: %s", args[i]);
+                               return ERROR_COMMAND_SYNTAX_ERROR;
+                       }
+               }
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       struct duration bench;
+       duration_start(&bench);
+
+       if (fileio_open(&fileio, args[1], FILEIO_READ, FILEIO_BINARY) != ERROR_OK)
        {
+               return ERROR_OK;
+       }
+
+       buf_cnt = binary_size = fileio.size;
 
+       if (!(oob_format & NAND_OOB_ONLY))
+       {
+               page_size = p->page_size;
+               page = malloc(p->page_size);
        }
-       else
+
+       if (oob_format & (NAND_OOB_RAW | NAND_OOB_SW_ECC | NAND_OOB_SW_ECC_KW))
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               if (p->page_size == 512) {
+                       oob_size = 16;
+                       eccpos = nand_oob_16.eccpos;
+               } else if (p->page_size == 2048) {
+                       oob_size = 64;
+                       eccpos = nand_oob_64.eccpos;
+               }
+               oob = malloc(oob_size);
        }
-       
-       return ERROR_OK;
-}
 
-int handle_nand_write_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
-{
-       u32 offset;
-       u32 binary_size;
-       u32 buf_cnt;
-       enum oob_formats oob_format = NAND_OOB_NONE;
-       
-       fileio_t file;
-       fileio_image_t image_info;
-       int sec_type_identified = 0;
-       enum fileio_sec_type sec_type;
-       
-       duration_t duration;
-       char *duration_text;
-       
-       nand_device_t *p;
-               
-       if (argc < 3)
+       if (offset % p->page_size)
        {
-               command_print(cmd_ctx, "usage: nand write <num> <file> <offset> [options]");
+               command_print(cmd_ctx, "only page size aligned offsets and sizes are supported");
+               fileio_close(&fileio);
+               free(oob);
+               free(page);
                return ERROR_OK;
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
-       {
-               u8 *page = NULL;
-               u32 page_size = 0;
-               u8 *oob = NULL;
-               u32 oob_size = 0;
-                       
-               duration_start_measure(&duration);
-               strtoul(args[2], NULL, 0);
-               
-               if (argc > 3)
+
+       while (buf_cnt > 0)
+       {
+               uint32_t size_read;
+
+               if (NULL != page)
                {
-                       int i;
-                       for (i = 3; i < argc; i++)
+                       fileio_read(&fileio, page_size, page, &size_read);
+                       buf_cnt -= size_read;
+                       if (size_read < page_size)
                        {
-                               if (!strcmp(args[i], "oob_raw"))
-                                       oob_format |= NAND_OOB_RAW;
-                               else if (!strcmp(args[i], "oob_only"))
-                                       oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY;
-                               else
-                               {
-                                       if (fileio_identify_image_type(&sec_type, args[i]) == ERROR_OK)
-                                       {
-                                               sec_type_identified = 1;
-                                       }
-                                       else
-                                       {
-                                               command_print(cmd_ctx, "unknown option: %s", args[i]);
-                                       }
-                               }
+                               memset(page + size_read, 0xff, page_size - size_read);
                        }
                }
-               
-               /* if no image type option was encountered, set the default */
-               if (!sec_type_identified)
-               {
-                       
-                       fileio_identify_image_type(&sec_type, NULL);
-                       sec_type_identified = 1;
-               }
-
-               image_info.base_address = strtoul(args[2], NULL, 0);
-               image_info.has_start_address = 0;
-       
-               if (fileio_open(&file, args[1], FILEIO_READ, 
-                       FILEIO_IMAGE, &image_info, sec_type) != ERROR_OK)
-               {
-                       command_print(cmd_ctx, "flash write error: %s", file.error_str);
-                       return ERROR_OK;
-               }
-       
-               /* the offset might have been overwritten by the image base address */
-               offset = image_info.base_address;
-               
-               buf_cnt = binary_size = file.size;
-               
-               if (!(oob_format & NAND_OOB_ONLY))
-               {
-                       page_size = p->page_size;
-                       page = malloc(p->page_size);
-               }
 
-               if (oob_format & NAND_OOB_RAW)
+               if (oob_format & NAND_OOB_SW_ECC)
                {
-                       if (p->page_size == 512)
-                               oob_size = 16;
-                       else if (p->page_size == 2048)
-                               oob_size = 64;
-                       oob = malloc(oob_size);
-               }
-               
-               if (offset % p->page_size)
+                       uint32_t i, j;
+                       uint8_t ecc[3];
+                       memset(oob, 0xff, oob_size);
+                       for (i = 0, j = 0; i < page_size; i += 256) {
+                               nand_calculate_ecc(p, page + i, ecc);
+                               oob[eccpos[j++]] = ecc[0];
+                               oob[eccpos[j++]] = ecc[1];
+                               oob[eccpos[j++]] = ecc[2];
+                       }
+               } else if (oob_format & NAND_OOB_SW_ECC_KW)
                {
-                       command_print(cmd_ctx, "only page size aligned offsets and sizes are supported");
-                       return ERROR_OK;
+                       /*
+                        * In this case eccpos is not used as
+                        * the ECC data is always stored contigously
+                        * at the end of the OOB area.  It consists
+                        * of 10 bytes per 512-byte data block.
+                        */
+                       uint32_t i;
+                       uint8_t *ecc = oob + oob_size - page_size/512 * 10;
+                       memset(oob, 0xff, oob_size);
+                       for (i = 0; i < page_size; i += 512) {
+                               nand_calculate_ecc_kw(p, page + i, ecc);
+                               ecc += 10;
+                       }
                }
-               
-               while (buf_cnt > 0)
+               else if (NULL != oob)
                {
-                       u32 size_read;
-                       
-                       if (page)
+                       fileio_read(&fileio, oob_size, oob, &size_read);
+                       buf_cnt -= size_read;
+                       if (size_read < oob_size)
                        {
-                               fileio_read(&file, page_size, page, &size_read);
-                               buf_cnt -= size_read;
-                               if (size_read < page_size)
-                               {
-                                       memset(page + size_read, 0xff, page_size - size_read);
-                               }
+                               memset(oob + size_read, 0xff, oob_size - size_read);
                        }
-                               
-                       if (oob)
-                       {
-                               fileio_read(&file, oob_size, oob, &size_read);
-                               buf_cnt -= size_read;
-                               if (size_read < oob_size)
-                               {
-                                       memset(oob + size_read, 0xff, oob_size - size_read);
-                               }
-                       }
-                       
-                       if (nand_write_page(p, offset / p->page_size, page, page_size, oob, oob_size) != ERROR_OK)
-                       {
-                               command_print(cmd_ctx, "failed writing file %s to NAND flash %s at offset 0x%8.8x",
-                                       file.url, args[0], offset);
-                               return ERROR_OK;
-                       }
-                       offset += page_size;
                }
 
-               duration_stop_measure(&duration, &duration_text);
-               command_print(cmd_ctx, "wrote file %s to NAND flash %s at offset 0x%8.8x in %s",
-                       file.url, args[0], image_info.base_address, duration_text);
-               free(duration_text);
+               if (nand_write_page(p, offset / p->page_size, page, page_size, oob, oob_size) != ERROR_OK)
+               {
+                       command_print(cmd_ctx, "failed writing file %s to NAND flash %s at offset 0x%8.8" PRIx32 "",
+                               args[1], args[0], offset);
+
+                       fileio_close(&fileio);
+                       free(oob);
+                       free(page);
+
+                       return ERROR_OK;
+               }
+               offset += page_size;
        }
-       else
+
+       fileio_close(&fileio);
+       free(oob);
+       free(page);
+       oob = NULL;
+       page = NULL;
+       if (duration_measure(&bench) == ERROR_OK)
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               command_print(cmd_ctx, "wrote file %s to NAND flash %s "
+                       "up to offset 0x%8.8" PRIx32 " in %fs (%0.3f kb/s)",
+                       args[1], args[0], offset, duration_elapsed(&bench),
+                       duration_kbps(&bench, fileio.size));
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_dump_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       nand_device_t *p;
-                       
        if (argc < 4)
        {
-               command_print(cmd_ctx, "usage: nand dump <num> <filename> <address> <size> [options]");
+               return ERROR_COMMAND_SYNTAX_ERROR;
+       }
+
+       nand_device_t *p;
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       if (NULL == p->device)
+       {
+               command_print(cmd_ctx, "#%s: not probed", args[0]);
                return ERROR_OK;
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       fileio_t fileio;
+
+       uint8_t *page = NULL;
+       uint32_t page_size = 0;
+       uint8_t *oob = NULL;
+       uint32_t oob_size = 0;
+       uint32_t address;
+       COMMAND_PARSE_NUMBER(u32, args[2], address);
+       uint32_t size;
+       COMMAND_PARSE_NUMBER(u32, args[3], size);
+       uint32_t bytes_done = 0;
+       enum oob_formats oob_format = NAND_OOB_NONE;
+
+       if (argc > 4)
        {
-               if (p->device)
+               int i;
+               for (i = 4; i < argc; i++)
                {
-                       fileio_t file;
-                       fileio_image_t image_info;
-                       duration_t duration;
-                       char *duration_text;
-                       int retval;
-                       
-                       u8 *page = NULL;
-                       u32 page_size = 0;
-                       u8 *oob = NULL;
-                       u32 oob_size = 0;
-                       u32 address = strtoul(args[2], NULL, 0);
-                       u32 size = strtoul(args[3], NULL, 0);
-                       u32 bytes_done = 0;
-                       enum oob_formats oob_format = NAND_OOB_NONE;
-                       
-                       if (argc > 4)
-                       {
-                               int i;
-                               for (i = 4; i < argc; i++)
-                               {
-                                       if (!strcmp(args[i], "oob_raw"))
-                                               oob_format |= NAND_OOB_RAW;
-                                       else if (!strcmp(args[i], "oob_only"))
-                                               oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY;
-                                       else
-                                               command_print(cmd_ctx, "unknown option: '%s'", args[i]); 
-                               }
-                       }
-                       
-                       if ((address % p->page_size) || (size % p->page_size))
-                       {
-                               command_print(cmd_ctx, "only page size aligned addresses and sizes are supported");
-                               return ERROR_OK;
-                       }
-               
-                       if (!(oob_format & NAND_OOB_ONLY))
-                       {
-                               page_size = p->page_size;
-                               page = malloc(p->page_size);
-                       }
+                       if (!strcmp(args[i], "oob_raw"))
+                               oob_format |= NAND_OOB_RAW;
+                       else if (!strcmp(args[i], "oob_only"))
+                               oob_format |= NAND_OOB_RAW | NAND_OOB_ONLY;
+                       else
+                               command_print(cmd_ctx, "unknown option: '%s'", args[i]);
+               }
+       }
 
-                       if (oob_format & NAND_OOB_RAW)
-                       {
-                               if (p->page_size == 512)
-                                       oob_size = 16;
-                               else if (p->page_size == 2048)
-                                       oob_size = 64;
-                               oob = malloc(oob_size);
-                       }
+       if ((address % p->page_size) || (size % p->page_size))
+       {
+               command_print(cmd_ctx, "only page size aligned addresses and sizes are supported");
+               return ERROR_OK;
+       }
 
-                       image_info.base_address = address;
-                       image_info.has_start_address = 0;
-                       
-                       if (fileio_open(&file, args[1], FILEIO_WRITE, 
-                               FILEIO_IMAGE, &image_info, FILEIO_PLAIN) != ERROR_OK)
-                       {
-                               command_print(cmd_ctx, "dump_image error: %s", file.error_str);
-                               return ERROR_OK;
-                       }
-       
-                       duration_start_measure(&duration);
-                       
-                       while (size > 0)
-                       {
-                               u32 size_written;
-                               if ((retval = nand_read_page(p, address / p->page_size, page, page_size, oob, oob_size)) != ERROR_OK)
-                               {
-                                       command_print(cmd_ctx, "reading NAND flash page failed");
-                                       return ERROR_OK;
-                               }
-                               
-                               if (page)
-                               {
-                                       fileio_write(&file, page_size, page, &size_written);
-                                       bytes_done += page_size;
-                               }
-                                       
-                               if (oob)
-                               {
-                                       fileio_write(&file, oob_size, oob, &size_written);
-                                       bytes_done += oob_size;
-                               }
-                                       
-                               size -= p->page_size;
-                               address += p->page_size;
-                       }
-                       
-                       if (page)
-                               free(page);
-                               
-                       if (oob)
-                               free(oob);
-                       
-                       fileio_close(&file);
-
-                       duration_stop_measure(&duration, &duration_text);
-                       command_print(cmd_ctx, "dumped %lli byte in %s", file.size, duration_text);
-                       free(duration_text);
+       if (!(oob_format & NAND_OOB_ONLY))
+       {
+               page_size = p->page_size;
+               page = malloc(p->page_size);
+       }
+
+       if (oob_format & NAND_OOB_RAW)
+       {
+               if (p->page_size == 512)
+                       oob_size = 16;
+               else if (p->page_size == 2048)
+                       oob_size = 64;
+               oob = malloc(oob_size);
+       }
+
+       if (fileio_open(&fileio, args[1], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
+       {
+               return ERROR_OK;
+       }
+
+       struct duration bench;
+       duration_start(&bench);
+
+       while (size > 0)
+       {
+               uint32_t size_written;
+               if ((retval = nand_read_page(p, address / p->page_size, page, page_size, oob, oob_size)) != ERROR_OK)
+               {
+                       command_print(cmd_ctx, "reading NAND flash page failed");
+                       free(page);
+                       free(oob);
+                       fileio_close(&fileio);
+                       return ERROR_OK;
                }
-               else
+
+               if (NULL != page)
                {
-                       command_print(cmd_ctx, "#%i: not probed");
+                       fileio_write(&fileio, page_size, page, &size_written);
+                       bytes_done += page_size;
                }
+
+               if (NULL != oob)
+               {
+                       fileio_write(&fileio, oob_size, oob, &size_written);
+                       bytes_done += oob_size;
+               }
+
+               size -= p->page_size;
+               address += p->page_size;
        }
-       else
+
+       free(page);
+       page = NULL;
+       free(oob);
+       oob = NULL;
+       fileio_close(&fileio);
+
+       if (duration_measure(&bench) == ERROR_OK)
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               command_print(cmd_ctx, "dumped %lld byte in %fs (%0.3f kb/s)",
+                       fileio.size, duration_elapsed(&bench),
+                       duration_kbps(&bench, fileio.size));
        }
-       
+
        return ERROR_OK;
 }
 
-int handle_nand_raw_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int handle_nand_raw_access_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       nand_device_t *p;
-               
        if ((argc < 1) || (argc > 2))
        {
-               command_print(cmd_ctx, "usage: nand raw_access <num> ['enable'|'disable']");
-               return ERROR_OK;
+               return ERROR_COMMAND_SYNTAX_ERROR;
        }
-       
-       p = get_nand_device_by_num(strtoul(args[0], NULL, 0));
-       if (p)
+
+       nand_device_t *p;
+       int retval = nand_command_get_device_by_num(cmd_ctx, args[0], &p);
+       if (ERROR_OK != retval)
+               return retval;
+
+       if (NULL == p->device)
        {
-               if (p->device)
-               {
-                       if (argc == 2)
-                       {
-                               if (strcmp("enable", args[1]) == 0)
-                               {
-                                       p->use_raw = 1;
-                               }
-                               else if (strcmp("disable", args[1]) == 0)
-                               {
-                                       p->use_raw = 0;
-                               }
-                               else
-                               {
-                                       command_print(cmd_ctx, "usage: nand raw_access ['enable'|disable']");
-                               }
-                       }
-       
-                       command_print(cmd_ctx, "raw access is %s", (p->use_raw) ? "enabled" : "disabled");
-               }
-               else
-               {
-                       command_print(cmd_ctx, "#%i: not probed");
-               }
+               command_print(cmd_ctx, "#%s: not probed", args[0]);
+               return ERROR_OK;
        }
-       else
+
+       if (argc == 2)
        {
-               command_print(cmd_ctx, "NAND flash device '#%s' is out of bounds", args[0]);
+               if (strcmp("enable", args[1]) == 0)
+                       p->use_raw = 1;
+               else if (strcmp("disable", args[1]) == 0)
+                       p->use_raw = 0;
+               else
+                       return ERROR_COMMAND_SYNTAX_ERROR;
        }
-       
+
+       const char *msg = p->use_raw ? "enabled" : "disabled";
+       command_print(cmd_ctx, "raw access is %s", msg);
+
        return ERROR_OK;
 }
 
+int nand_init(struct command_context_s *cmd_ctx)
+{
+       if (!nand_devices)
+               return ERROR_OK;
+
+       register_command(cmd_ctx, nand_cmd, "list",
+                       handle_nand_list_command, COMMAND_EXEC,
+                       "list configured NAND flash devices");
+       register_command(cmd_ctx, nand_cmd, "info",
+                       handle_nand_info_command, COMMAND_EXEC,
+                       "print info about NAND flash device <num>");
+       register_command(cmd_ctx, nand_cmd, "probe",
+                       handle_nand_probe_command, COMMAND_EXEC,
+                       "identify NAND flash device <num>");
+
+       register_command(cmd_ctx, nand_cmd, "check_bad_blocks",
+                       handle_nand_check_bad_blocks_command, COMMAND_EXEC,
+                       "check NAND flash device <num> for bad blocks [<offset> <length>]");
+       register_command(cmd_ctx, nand_cmd, "erase",
+                       handle_nand_erase_command, COMMAND_EXEC,
+                       "erase blocks on NAND flash device <num> [<offset> <length>]");
+       register_command(cmd_ctx, nand_cmd, "dump",
+                       handle_nand_dump_command, COMMAND_EXEC,
+                       "dump from NAND flash device <num> <filename> "
+                        "<offset> <length> [oob_raw | oob_only]");
+       register_command(cmd_ctx, nand_cmd, "write",
+                       handle_nand_write_command, COMMAND_EXEC,
+                       "write to NAND flash device <num> <filename> <offset> "
+                       "[oob_raw | oob_only | oob_softecc | oob_softecc_kw]");
+
+       register_command(cmd_ctx, nand_cmd, "raw_access",
+                       handle_nand_raw_access_command, COMMAND_EXEC,
+                       "raw access to NAND flash device <num> ['enable'|'disable']");
+
+       return ERROR_OK;
+}