- Replace 'switch(' with 'switch ('.

[openocd.git] / src / flash / at91sam3.c

/***************************************************************************
 *   Copyright (C) 2009 by Duane Ellis                                     *
 *   openocd@duaneellis.com                                                *
 *                                                                         *
 *   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  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE.  See the         *
 *   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.             *
****************************************************************************/

/* Some of the the lower level code was based on code supplied by
 * ATMEL under this copyright. */

/* BEGIN ATMEL COPYRIGHT */
/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
 * ----------------------------------------------------------------------------
 * Copyright (c) 2009, Atmel Corporation
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the disclaimer below.
 *
 * Atmel's name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * ----------------------------------------------------------------------------
 */
/* END ATMEL COPYRIGHT */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif


#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include "log.h"
#include "types.h"
#include "flash.h"
#include "target.h"
#include "membuf.h"
#include "at91sam3.h"
#include "time_support.h"

#define REG_NAME_WIDTH  (12)


#define FLASH_BANK0_BASE   0x00080000
#define FLASH_BANK1_BASE   0x00100000

#define         AT91C_EFC_FCMD_GETD                 (0x0) // (EFC) Get Flash Descriptor
#define         AT91C_EFC_FCMD_WP                   (0x1) // (EFC) Write Page
#define         AT91C_EFC_FCMD_WPL                  (0x2) // (EFC) Write Page and Lock
#define         AT91C_EFC_FCMD_EWP                  (0x3) // (EFC) Erase Page and Write Page
#define         AT91C_EFC_FCMD_EWPL                 (0x4) // (EFC) Erase Page and Write Page then Lock
#define         AT91C_EFC_FCMD_EA                   (0x5) // (EFC) Erase All
// cmd6 is not present int he at91sam3u4/2/1 data sheet table 17-2
// #define      AT91C_EFC_FCMD_EPL                  (0x6) // (EFC) Erase plane?
// cmd7 is not present int he at91sam3u4/2/1 data sheet table 17-2
// #define      AT91C_EFC_FCMD_EPA                  (0x7) // (EFC) Erase pages?
#define         AT91C_EFC_FCMD_SLB                  (0x8) // (EFC) Set Lock Bit
#define         AT91C_EFC_FCMD_CLB                  (0x9) // (EFC) Clear Lock Bit
#define         AT91C_EFC_FCMD_GLB                  (0xA) // (EFC) Get Lock Bit
#define         AT91C_EFC_FCMD_SFB                  (0xB) // (EFC) Set Fuse Bit
#define         AT91C_EFC_FCMD_CFB                  (0xC) // (EFC) Clear Fuse Bit
#define         AT91C_EFC_FCMD_GFB                  (0xD) // (EFC) Get Fuse Bit
#define         AT91C_EFC_FCMD_STUI                 (0xE) // (EFC) Start Read Unique ID
#define         AT91C_EFC_FCMD_SPUI                 (0xF) // (EFC) Stop Read Unique ID

#define  offset_EFC_FMR   0
#define  offset_EFC_FCR   4
#define  offset_EFC_FSR   8
#define  offset_EFC_FRR   12


static float
_tomhz( uint32_t freq_hz )
{
        float f;

        f = ((float)(freq_hz)) / 1000000.0;
        return f;
}

// How the chip is configured.
struct sam3_cfg {
        uint32_t unique_id[4];

        uint32_t slow_freq;
        uint32_t rc_freq;
        uint32_t mainosc_freq;
        uint32_t plla_freq;
        uint32_t mclk_freq;
        uint32_t cpu_freq;
        uint32_t fclk_freq;
        uint32_t pclk0_freq;
        uint32_t pclk1_freq;
        uint32_t pclk2_freq;


#define SAM3_CHIPID_CIDR          (0x400E0740)
        uint32_t CHIPID_CIDR;
#define SAM3_CHIPID_EXID          (0x400E0744)
        uint32_t CHIPID_EXID;

#define SAM3_SUPC_CR              (0x400E1210)
        uint32_t SUPC_CR;             

#define SAM3_PMC_BASE             (0x400E0400)
#define SAM3_PMC_SCSR             (SAM3_PMC_BASE + 0x0008)
        uint32_t PMC_SCSR;
#define SAM3_PMC_PCSR             (SAM3_PMC_BASE + 0x0018)
        uint32_t PMC_PCSR;
#define SAM3_CKGR_UCKR            (SAM3_PMC_BASE + 0x001c)
        uint32_t CKGR_UCKR;
#define SAM3_CKGR_MOR             (SAM3_PMC_BASE + 0x0020)
        uint32_t CKGR_MOR;
#define SAM3_CKGR_MCFR            (SAM3_PMC_BASE + 0x0024)
        uint32_t CKGR_MCFR;
#define SAM3_CKGR_PLLAR           (SAM3_PMC_BASE + 0x0028)
        uint32_t CKGR_PLLAR;
#define SAM3_PMC_MCKR             (SAM3_PMC_BASE + 0x0030)
        uint32_t PMC_MCKR;
#define SAM3_PMC_PCK0             (SAM3_PMC_BASE + 0x0040)
        uint32_t PMC_PCK0;
#define SAM3_PMC_PCK1             (SAM3_PMC_BASE + 0x0044)
        uint32_t PMC_PCK1;
#define SAM3_PMC_PCK2             (SAM3_PMC_BASE + 0x0048)
        uint32_t PMC_PCK2;
#define SAM3_PMC_SR               (SAM3_PMC_BASE + 0x0068)
        uint32_t PMC_SR;
#define SAM3_PMC_IMR              (SAM3_PMC_BASE + 0x006c)
        uint32_t PMC_IMR;
#define SAM3_PMC_FSMR             (SAM3_PMC_BASE + 0x0070)
        uint32_t PMC_FSMR;
#define SAM3_PMC_FSPR             (SAM3_PMC_BASE + 0x0074)
        uint32_t PMC_FSPR;
};


struct sam3_bank_private {
        int probed;
        // DANGER: THERE ARE DRAGONS HERE..
        // NOTE: If you add more 'ghost' pointers
        // be aware that you must *manually* update 
        // these pointers in the function sam3_GetDetails()
        // See the comment "Here there be dragons"

        // so we can find the chip we belong to
        struct sam3_chip *pChip;
        // so we can find the orginal bank pointer 
        flash_bank_t *pBank;
        unsigned bank_number;
        uint32_t controller_address;
        uint32_t base_address;
        bool present;
        unsigned size_bytes;
        unsigned nsectors;
        unsigned sector_size;
        unsigned page_size;
};

struct sam3_chip_details {
        // THERE ARE DRAGONS HERE..
        // note: If you add pointers here
        // becareful about them as they
        // may need to be updated inside
        // the function: "sam3_GetDetails()
        // which copy/overwrites the
        // 'runtime' copy of this structure
        uint32_t chipid_cidr;
        const char *name;

        unsigned n_gpnvms;
#define SAM3_N_NVM_BITS 3
        unsigned  gpnvm[SAM3_N_NVM_BITS];
        unsigned  total_flash_size;
        unsigned  total_sram_size;
        unsigned  n_banks;
#define SAM3_MAX_FLASH_BANKS 2
        // these are "initialized" from the global const data
        struct sam3_bank_private bank[SAM3_MAX_FLASH_BANKS];
};


struct sam3_chip {
        struct sam3_chip *next;
        int    probed;

        // this is "initialized" from the global const structure
        struct sam3_chip_details details;
        target_t *target;
        struct sam3_cfg cfg;

        struct membuf *mbuf;
};


struct sam3_reg_list {
        uint32_t address;  size_t struct_offset; const char *name;
        void (*explain_func)( struct sam3_chip *pInfo );
};


static struct sam3_chip *all_sam3_chips;

static struct sam3_chip *
get_current_sam3(struct command_context_s *cmd_ctx )
{
        target_t *t;
        static struct sam3_chip *p;

        t = get_current_target( cmd_ctx );
        if ( !t ){
                command_print( cmd_ctx, "No current target?");
                return NULL;
        }

        p = all_sam3_chips;
        if ( !p ){
                // this should not happen
                // the command is not registered until the chip is created?
                command_print( cmd_ctx, "No SAM3 chips exist?");
                return NULL;
        }

        while ( p ){
                if ( p->target == t ){
                        return p;
                }
                p = p->next;
        }
        command_print( cmd_ctx, "Cannot find SAM3 chip?");
        return NULL;
}


// these are used to *initialize* the "pChip->details" structure.
static const struct sam3_chip_details all_sam3_details[] = {
        {
                .chipid_cidr    = 0x28100960,
                .name           = "at91sam3u4e",
                .total_flash_size     = 256 * 1024,
                .total_sram_size      = 52 * 1024,
                .n_gpnvms       = 3, 
                .n_banks        = 2,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                //
                // NOTE: banks 0 & 1 switch places
                //     if gpnvm[2] == 0
                //         Bank0 is the boot rom
                //      else
                //         Bank1 is the boot rom
                //      endif
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 1,
                        .base_address = FLASH_BANK1_BASE,
                        .controller_address = 0x400e0a00,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },
        },

        {
                .chipid_cidr    = 0x281a0760,
                .name           = "at91sam3u2e",
                .total_flash_size     = 128 * 1024,
                .total_sram_size      =  36 * 1024,
                .n_gpnvms       = 2, 
                .n_banks        = 1,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .present = 0,
                        .probed = 0,
                        .bank_number = 1,
                },
        },
        {
                .chipid_cidr    = 0x28190560,
                .name           = "at91sam3u1e",
                .total_flash_size     = 64 * 1024,
                .total_sram_size      = 20 * 1024,
                .n_gpnvms       = 2, 
                .n_banks        = 1,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                //
        
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes =  64 * 1024,
                        .nsectors   =  8,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .present = 0,
                        .probed = 0,
                        .bank_number = 1,
                },
        },
                
        {
                .chipid_cidr    = 0x28000960,
                .name           = "at91sam3u4c",
                .total_flash_size     = 256 * 1024,
                .total_sram_size      = 52 * 1024,
                .n_gpnvms       = 3, 
                .n_banks        = 2,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                //
                // NOTE: banks 0 & 1 switch places
                //     if gpnvm[2] == 0
                //         Bank0 is the boot rom
                //      else
                //         Bank1 is the boot rom
                //      endif
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 1,
                        .base_address = FLASH_BANK1_BASE,
                        .controller_address = 0x400e0a00,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },
        },

        {
                .chipid_cidr    = 0x280a0760,
                .name           = "at91sam3u2c",
                .total_flash_size     = 128 * 1024,
                .total_sram_size      = 36 * 1024,
                .n_gpnvms       = 2, 
                .n_banks        = 1,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes = 128 * 1024,
                        .nsectors   = 16,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .present = 0,
                        .probed = 0,
                        .bank_number = 1,
                },
        },
        {
                .chipid_cidr    = 0x28090560,
                .name           = "at91sam3u1c",
                .total_flash_size     = 64 * 1024,
                .total_sram_size      = 20 * 1024,
                .n_gpnvms       = 2, 
                .n_banks        = 1,

                // System boots at address 0x0
                // gpnvm[1] = selects boot code
                //     if gpnvm[1] == 0
                //         boot is via "SAMBA" (rom)
                //     else 
                //         boot is via FLASH
                //         Selection is via gpnvm[2]
                //     endif
                //
        
                .bank[0] = { 
                        .probed = 0,
                        .pChip  = NULL,
                        .pBank  = NULL,
                        .bank_number = 0,
                        .base_address = FLASH_BANK0_BASE, 
                        .controller_address = 0x400e0800,
                        .present = 1,
                        .size_bytes =  64 * 1024,
                        .nsectors   =  8,
                        .sector_size = 8192,
                        .page_size   = 256,
                },

                .bank[1] = {
                        .present = 0,
                        .probed = 0,
                        .bank_number = 1,
                },
        },

        // terminate
        { 
                .chipid_cidr    = 0,
                .name                   = NULL,
        }
};

/* Globals above */
/***********************************************************************
 **********************************************************************
 **********************************************************************
 **********************************************************************
 **********************************************************************
 **********************************************************************/
/* *ATMEL* style code - from the SAM3 driver code */

/** Get the current status of the EEFC
 *
 * the value of some status bits (LOCKE, PROGE).
 * @param pPrivate - info about the bank
 * @param v        - result goes here
 */
static int 
EFC_GetStatus( struct sam3_bank_private *pPrivate, uint32_t *v )
{
        int r;
        r = target_read_u32( pPrivate->pChip->target, pPrivate->controller_address + offset_EFC_FSR, v );
        LOG_DEBUG("Status: 0x%08x (lockerror: %d, cmderror: %d, ready: %d)", 
                          (unsigned int)(*v),
                          ((unsigned int)((*v >> 2) & 1)),
                          ((unsigned int)((*v >> 1) & 1)),
                          ((unsigned int)((*v >> 0) & 1)));
                          
        return r;
}

/** Get the result of the last executed command.
 * @param pPrivate - info about the bank
 * @param v        - result goes here
 */
static int 
EFC_GetResult( struct sam3_bank_private *pPrivate, uint32_t *v )
{
        int r;
        uint32_t rv;
        r = target_read_u32( pPrivate->pChip->target, pPrivate->controller_address + offset_EFC_FRR, &rv );
        if ( v ){
                *v = rv;
        }
        LOG_DEBUG("Result: 0x%08x", ((unsigned int)(rv)));
        return r;
}

static int
EFC_StartCommand(struct sam3_bank_private *pPrivate,
                                 unsigned command, unsigned argument )
{
        uint32_t n,v;
        int r;
        int retry;

        retry = 0;
 do_retry:

    // Check command & argument
    switch (command) {

        case AT91C_EFC_FCMD_WP:
        case AT91C_EFC_FCMD_WPL:
        case AT91C_EFC_FCMD_EWP: 
        case AT91C_EFC_FCMD_EWPL:
                // case AT91C_EFC_FCMD_EPL:
                // case AT91C_EFC_FCMD_EPA:
        case AT91C_EFC_FCMD_SLB:
        case AT91C_EFC_FCMD_CLB:
                n = (pPrivate->size_bytes / pPrivate->page_size);
                if ( argument >= n ){
                        LOG_ERROR("*BUG*: Embedded flash has only %u pages", (unsigned)(n));
                }
                break;
                
        case AT91C_EFC_FCMD_SFB:
        case AT91C_EFC_FCMD_CFB:
                if ( argument >= pPrivate->pChip->details.n_gpnvms ){
                        LOG_ERROR("*BUG*: Embedded flash has only %d GPNVMs", 
                                          pPrivate->pChip->details.n_gpnvms );
                }
                break;
                
        case AT91C_EFC_FCMD_GETD:
        case AT91C_EFC_FCMD_EA:
        case AT91C_EFC_FCMD_GLB:
        case AT91C_EFC_FCMD_GFB:
        case AT91C_EFC_FCMD_STUI:
        case AT91C_EFC_FCMD_SPUI:
                if ( argument != 0 ){
                        LOG_ERROR("Argument is meaningless for cmd: %d", command );
                }
                break;
        default:
                LOG_ERROR("Unknown command %d", command);
                break;
    }

        if ( command == AT91C_EFC_FCMD_SPUI ){
                // this is a very special situation.
                // Situation (1) - error/retry - see below
                //      And we are being called recursively
                // Situation (2) - normal, finished reading unique id
        } else {
                // it should be "ready"
                EFC_GetStatus( pPrivate, &v );
                if ( v & 1 ){
                        // then it is ready
                        // we go on
                } else {
                        if ( retry ){
                                // we have done this before
                                // the controller is not responding.
                                LOG_ERROR("flash controller(%d) is not ready! Error", pPrivate->bank_number );
                                return ERROR_FAIL;
                        } else {
                                retry++;
                                LOG_ERROR("Flash controller(%d) is not ready, attempting reset", 
                                                  pPrivate->bank_number );
                                // we do that by issuing the *STOP* command
                                EFC_StartCommand( pPrivate, AT91C_EFC_FCMD_SPUI, 0 );
                                // above is recursive, and further recursion is blocked by 
                                // if ( command == AT91C_EFC_FCMD_SPUI ) above
                                goto do_retry;
                        }
                }
        }

        v = (0x5A << 24) | (argument << 8) | command;
        LOG_DEBUG("Command: 0x%08x", ((unsigned int)(v)) );
        r = target_write_u32( pPrivate->pBank->target, 
                                                  pPrivate->controller_address + offset_EFC_FCR,
                                                  v);
        if ( r != ERROR_OK ){
                LOG_DEBUG("Error Write failed");
        }
        return r;
}

/** Performs the given command and wait until its completion (or an error).
 *
 * @param pPrivate - info about the bank
 * @param command  - Command to perform.
 * @param argument - Optional command argument.
 * @param status   - put command status bits here
 */
static int 
EFC_PerformCommand( struct sam3_bank_private *pPrivate, 
                                        unsigned command, 
                                        unsigned argument, 
                                        uint32_t *status)
{

        int r;
        uint32_t v;
        long long ms_now, ms_end;

        // default 
        if ( status ){
                *status = 0;
        }

        r = EFC_StartCommand( pPrivate, command, argument );
        if ( r != ERROR_OK ){
                return r;
        }

        ms_end = 500 + timeval_ms();


    do {
                r = EFC_GetStatus( pPrivate, &v );
                if ( r != ERROR_OK ){
                        return r;
                }
                ms_now = timeval_ms();
                if ( ms_now > ms_end ){
                        // error
                        LOG_ERROR("Command timeout");
                        return ERROR_FAIL;
                }
    }
    while ( (v & 1) == 0 )
                ;

        // error bits..
        if ( status ){
                *status = (v & 0x6);
        }
        return ERROR_OK;

}





/** Read the unique ID.
 * 
 * \param pPrivate - info about the bank
 *
 * The unique ID is stored in the 'pPrivate' structure.
 */

static int
FLASHD_ReadUniqueID ( struct sam3_bank_private *pPrivate )
{
        int r;
        uint32_t v;
        int x;
        // assume 0
    pPrivate->pChip->cfg.unique_id[0] = 0;
    pPrivate->pChip->cfg.unique_id[1] = 0;
    pPrivate->pChip->cfg.unique_id[2] = 0;
    pPrivate->pChip->cfg.unique_id[3] = 0;

        LOG_DEBUG("Begin");
        r = EFC_StartCommand( pPrivate, AT91C_EFC_FCMD_STUI, 0);
        if ( r < 0 ){
                return r;
        }

        for( x = 0 ; x < 4 ; x++ ){
                r = target_read_u32( pPrivate->pChip->target, 
                                                         pPrivate->pBank->base + (x * 4),
                                                         &v );
                if ( r < 0 ){
                        return r;
                }
                pPrivate->pChip->cfg.unique_id[x] = v;
        }

    r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_SPUI, 0, NULL );
        LOG_DEBUG("End: R=%d, id=0x%08x, 0x%08x, 0x%08x, 0x%08x",
                          r, 
                          (unsigned int)(pPrivate->pChip->cfg.unique_id[0]),
                          (unsigned int)(pPrivate->pChip->cfg.unique_id[1]),
                          (unsigned int)(pPrivate->pChip->cfg.unique_id[2]),
                          (unsigned int)(pPrivate->pChip->cfg.unique_id[3]));
        return r;
        
}

/** Erases the entire flash.
 * @param pPrivate - the info about the bank.
 */
static int
FLASHD_EraseEntireBank( struct sam3_bank_private *pPrivate )
{
        LOG_DEBUG("Here");
        return EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_EA, 0, NULL );
}



/** Gets current GPNVM state.
 * @param pPrivate - info about the bank.
 * @param gpnvm    -  GPNVM bit index.
 * @param puthere  - result stored here.
 *
 */
//------------------------------------------------------------------------------
static int 
FLASHD_GetGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm, unsigned *puthere)
{
        uint32_t v;
        int r;

        LOG_DEBUG("Here");
        if ( pPrivate->bank_number != 0 ){
                LOG_ERROR("GPNVM only works with Bank0");
                return ERROR_FAIL;
        }

        if ( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
                LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
                                  gpnvm,pPrivate->pChip->details.n_gpnvms );
                return ERROR_FAIL;
        }

    // Get GPNVMs status
        r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_GFB, 0, NULL );
        if ( r != ERROR_OK ){
                LOG_ERROR("Failed");
                return r;
        }

    r = EFC_GetResult(pPrivate, &v );

        if ( puthere ){
                // Check if GPNVM is set
                // get the bit and make it a 0/1 
                *puthere = (v >> gpnvm) & 1;
        }

        return r;
}




/** Clears the selected GPNVM bit.
 * @param gpnvm  GPNVM index.
 *
 * Returns 0 if successful; otherwise returns an error code.
 */
static int 
FLASHD_ClrGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm)
{
        int r;
        unsigned v;

        LOG_DEBUG("Here");
        if ( pPrivate->bank_number != 0 ){
                LOG_ERROR("GPNVM only works with Bank0");
                return ERROR_FAIL;
        }

        if ( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
                LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
                                  gpnvm,pPrivate->pChip->details.n_gpnvms );
                return ERROR_FAIL;
        }

        r = FLASHD_GetGPNVM( pPrivate, gpnvm, &v );
        if ( r != ERROR_OK ){
                LOG_DEBUG("Failed: %d",r);
                return r;
        }
        r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_CFB, gpnvm, NULL);
        LOG_DEBUG("End: %d",r);
        return r;
}



/** Sets the selected GPNVM bit.
 *  @param gpnvm  GPNVM index.
 *
 */
static int 
FLASHD_SetGPNVM( struct sam3_bank_private *pPrivate, unsigned gpnvm)
{
        int r;
        unsigned v;

        if ( pPrivate->bank_number != 0 ){
                LOG_ERROR("GPNVM only works with Bank0");
                return ERROR_FAIL;
        }

        if ( gpnvm >= pPrivate->pChip->details.n_gpnvms ){
                LOG_ERROR("Invalid GPNVM %d, max: %d, ignored",
                                  gpnvm,pPrivate->pChip->details.n_gpnvms );
                return ERROR_FAIL;
        }

        r = FLASHD_GetGPNVM( pPrivate, gpnvm, &v );
        if ( r != ERROR_OK ){
                return r;
        }
        if ( v ){
                // already set
                r = ERROR_OK;
        } else {
                // set it
                r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_SFB, gpnvm, NULL );
        }
        return r;
}


/** Returns a bit field (at most 64) of locked regions within a page.
 * @param pPrivate - info about the bank
 * @param v        - where to store locked bits
 * \param end  End address of range.
 */

static int 
FLASHD_GetLockBits(struct sam3_bank_private *pPrivate, uint32_t *v )
{
        int r;
        LOG_DEBUG("Here");
    r = EFC_PerformCommand( pPrivate, AT91C_EFC_FCMD_GLB, 0, NULL);
        if ( r == ERROR_OK ){
                r = EFC_GetResult(pPrivate, v );
        }
        LOG_DEBUG("End: %d",r);
        return r;
}


/**Unlocks all the regions in the given address range. 
 *
 * \param start_sector - first sector to unlock
 * \param end_sector   - last (inclusive) to unlock
 */

static int
FLASHD_Unlock( struct sam3_bank_private *pPrivate,
                           unsigned start_sector,
                           unsigned end_sector )
{
        int r;
        uint32_t status;
        uint32_t pg;
        uint32_t pages_per_sector;

        pages_per_sector = pPrivate->sector_size / pPrivate->page_size;

    /* Unlock all pages */
    while (start_sector <= end_sector){
                pg = start_sector * pages_per_sector;

        r = EFC_PerformCommand(pPrivate, AT91C_EFC_FCMD_CLB, pg, &status );
        if (r != ERROR_OK) {
            return r;
        }
        start_sector++;
    }

    return ERROR_OK;
}


/** Locks regions
 *
 * @param start_sector - first sector to lock
 * @param end_sector   - last sector (inclusive) to lock
 */


static int 
FLASHD_Lock( struct sam3_bank_private *pPrivate,
                         unsigned start_sector,
                         unsigned end_sector )
{
        uint32_t status;
        uint32_t pg;
        uint32_t pages_per_sector;
        int r;

        pages_per_sector = pPrivate->sector_size / pPrivate->page_size;
        
    /* Lock all pages */
    while (start_sector <= end_sector){
                pg = start_sector * pages_per_sector;

        r = EFC_PerformCommand(pPrivate, AT91C_EFC_FCMD_SLB, pg, &status );
        if (r != ERROR_OK) {
            return r;
        }
        start_sector++;
    }
    return ERROR_OK;
}


/****** END SAM3 CODE ********/

/* begin helpful debug code */

static void
sam3_sprintf( struct sam3_chip *pChip , const char *fmt, ... )
{
        va_list ap;
        va_start(ap,fmt);
        if ( pChip->mbuf == NULL ){
                return;
        }

        membuf_vsprintf( pChip->mbuf, fmt, ap );
        va_end(ap);
}

// print the fieldname, the field value, in dec & hex, and return field value
static uint32_t 
sam3_reg_fieldname( struct sam3_chip *pChip, 
                                        const char *regname,
                                        uint32_t value,
                                        unsigned shift,
                                        unsigned width)
{
        uint32_t v;
        int hwidth, dwidth;


        // extract the field
        v = value >> shift;
        v = v & ((1 << width)-1);
        if ( width <= 16 ){
                hwidth = 4;
                dwidth = 5;
        } else {
                hwidth = 8;
                dwidth = 12;
        }
        
        // show the basics
        sam3_sprintf( pChip, "\t%*s: %*d [0x%0*x] ", 
                                  REG_NAME_WIDTH, regname,
                                  dwidth, v,
                                  hwidth, v  );
        return v;
}


static const char _unknown[] = "unknown";
static const char * const eproc_names[] = {
        _unknown,                                       // 0
        "arm946es",                                     // 1
        "arm7tdmi",                                     // 2 
        "cortex-m3",                            // 3
        "arm920t",                                      // 4
        "arm926ejs",                            // 5
        _unknown,                                       // 6
        _unknown,                                       // 7
        _unknown,                                       // 8
        _unknown,                                       // 9
        _unknown,                                       // 10
        _unknown,                                       // 11
        _unknown,                                       // 12
        _unknown,                                       // 13
        _unknown,                                       // 14
        _unknown,                                       // 15
};

#define nvpsize2 nvpsize                // these two tables are identical
static const char * const nvpsize[] = {
        "none",                                         //  0
        "8K bytes",                                     //  1
        "16K bytes",                            //  2
        "32K bytes",                            //  3
        _unknown,                                       //  4
        "64K bytes",                            //  5
        _unknown,                                       //  6
        "128K bytes",                           //  7
        _unknown,                                       //  8
        "256K bytes",                           //  9
        "512K bytes",                           // 10
        _unknown,                                       // 11
        "1024K bytes",                          // 12
        _unknown,                                       // 13
        "2048K bytes",                          // 14
        _unknown,                                       // 15
};


static const char * const sramsize[] = {
        "48K Bytes",                            //  0
        "1K Bytes",                                     //  1
        "2K Bytes",                                     //  2
        "6K Bytes",                                     //  3 
        "112K Bytes",                           //  4
        "4K Bytes",                                     //  5
        "80K Bytes",                            //  6
        "160K Bytes",                           //  7
        "8K Bytes",                                     //  8 
        "16K Bytes",                            //  9 
        "32K Bytes",                            // 10
        "64K Bytes",                            // 11
        "128K Bytes",                           // 12
        "256K Bytes",                           // 13
        "96K Bytes",                            // 14
        "512K Bytes",                           // 15

};

static const struct archnames { unsigned value; const char *name; } archnames[] = {
        { 0x19,  "AT91SAM9xx Series"                                            },
        { 0x29,  "AT91SAM9XExx Series"                                          },
        { 0x34,  "AT91x34 Series"                                                       },
        { 0x37,  "CAP7 Series"                                                          },
        { 0x39,  "CAP9 Series"                                                          },
        { 0x3B,  "CAP11 Series"                                                         },
        { 0x40,  "AT91x40 Series"                                                       },
        { 0x42,  "AT91x42 Series"                                                       },
        { 0x55,  "AT91x55 Series"                                                       },
        { 0x60,  "AT91SAM7Axx Series"                                           },
        { 0x61,  "AT91SAM7AQxx Series"                                          },
        { 0x63,  "AT91x63 Series"                                                       },
        { 0x70,  "AT91SAM7Sxx Series"                                           },
        { 0x71,  "AT91SAM7XCxx Series"                                          },
        { 0x72,  "AT91SAM7SExx Series"                                          },
        { 0x73,  "AT91SAM7Lxx Series"                                           },
        { 0x75,  "AT91SAM7Xxx Series"                                           },
        { 0x76,  "AT91SAM7SLxx Series"                                          },
        { 0x80,  "ATSAM3UxC Series (100-pin version)"           },
        { 0x81,  "ATSAM3UxE Series (144-pin version)"           },
        { 0x83,  "ATSAM3AxC Series (100-pin version)"           },
        { 0x84,  "ATSAM3XxC Series (100-pin version)"           },
        { 0x85,  "ATSAM3XxE Series (144-pin version)"           },
        { 0x86,  "ATSAM3XxG Series (208/217-pin version)"       },
        { 0x88,  "ATSAM3SxA Series (48-pin version)"            },
        { 0x89,  "ATSAM3SxB Series (64-pin version)"            },
        { 0x8A,  "ATSAM3SxC Series (100-pin version)"           },
        { 0x92,  "AT91x92 Series"                                                       },
        { 0xF0,  "AT75Cxx Series"                                                       },
        { -1, NULL },

};

static const char * const nvptype[] = {
        "rom", // 0
        "romless or onchip flash", // 1
        "embedded flash memory", // 2
        "rom(nvpsiz) + embedded flash (nvpsiz2)", //3
        "sram emulating flash", // 4
        _unknown, // 5
        _unknown, // 6
        _unknown, // 7  
        
};

static const char *_yes_or_no( uint32_t v )
{
        if ( v ){
                return "YES";
        } else {
                return "NO";
        }
}

static const char * const _rc_freq[] = {
        "4 MHz", "8 MHz", "12 MHz", "reserved"
};

static void 
sam3_explain_ckgr_mor(  struct sam3_chip *pChip )
{
        uint32_t v;
        uint32_t rcen;

        v = sam3_reg_fieldname(pChip, "MOSCXTEN", pChip->cfg.CKGR_MOR, 0, 1 );
        sam3_sprintf( pChip, "(main xtal enabled: %s)\n",
                                  _yes_or_no(v) );
        v = sam3_reg_fieldname(pChip, "MOSCXTBY", pChip->cfg.CKGR_MOR, 1, 1 ); 
        sam3_sprintf( pChip, "(main osc bypass: %s)\n",
                                  _yes_or_no(v) );
        rcen = sam3_reg_fieldname(pChip, "MOSCRCEN", pChip->cfg.CKGR_MOR, 2, 1 );
        sam3_sprintf( pChip, "(onchip RC-OSC enabled: %s)\n",
                                  _yes_or_no(rcen) );
        v = sam3_reg_fieldname(pChip, "MOSCRCF", pChip->cfg.CKGR_MOR, 4, 3 );
        sam3_sprintf( pChip, "(onchip RC-OSC freq: %s)\n",
                                  _rc_freq[v] );

        pChip->cfg.rc_freq = 0;
        if ( rcen ){
                switch ( v ){
                default:
                        pChip->cfg.rc_freq = 0;
                case 0:
                        pChip->cfg.rc_freq = 4 * 1000 * 1000;
                        break;
                case 1:
                        pChip->cfg.rc_freq = 8 * 1000 * 1000;
                        break;
                case 2:
                        pChip->cfg.rc_freq = 12* 1000 * 1000;
                        break;
                }
        }

        v = sam3_reg_fieldname(pChip,"MOSCXTST", pChip->cfg.CKGR_MOR, 8, 8 );
        sam3_sprintf( pChip, "(startup clks, time= %f uSecs)\n",
                                  ((float)(v * 1000000)) / ((float)(pChip->cfg.slow_freq)));
        v = sam3_reg_fieldname(pChip, "MOSCSEL", pChip->cfg.CKGR_MOR, 24, 1 );
        sam3_sprintf( pChip, "(mainosc source: %s)\n",
                                  v ? "external xtal" : "internal RC");
        
        v = sam3_reg_fieldname(pChip,"CFDEN", pChip->cfg.CKGR_MOR, 25, 1 );
        sam3_sprintf(pChip, "(clock failure enabled: %s)\n",
                                 _yes_or_no(v));
}

        

static void 
sam3_explain_chipid_cidr( struct sam3_chip *pChip )
{
        int x;
        uint32_t v;
        const char *cp;

        sam3_reg_fieldname( pChip, "Version", pChip->cfg.CHIPID_CIDR, 0, 5 );
        sam3_sprintf(pChip,"\n");

        v = sam3_reg_fieldname( pChip, "EPROC", pChip->cfg.CHIPID_CIDR, 5, 3 );
        sam3_sprintf( pChip, "%s\n", eproc_names[v]);
        
        v = sam3_reg_fieldname( pChip, "NVPSIZE", pChip->cfg.CHIPID_CIDR, 8, 4 );
        sam3_sprintf( pChip, "%s\n", nvpsize[v]);

        v = sam3_reg_fieldname( pChip, "NVPSIZE2", pChip->cfg.CHIPID_CIDR, 12, 4 );
        sam3_sprintf( pChip, "%s\n", nvpsize2[v]);

        v = sam3_reg_fieldname( pChip, "SRAMSIZE", pChip->cfg.CHIPID_CIDR, 16,4 );
        sam3_sprintf( pChip, "%s\n", sramsize[ v ] );

        v = sam3_reg_fieldname( pChip, "ARCH", pChip->cfg.CHIPID_CIDR, 20, 8 );
        cp = _unknown;
        for( x = 0 ; archnames[x].name ; x++ ){
                if ( v == archnames[x].value ){
                        cp = archnames[x].name;
                        break;
                }
        }
        
        sam3_sprintf( pChip, "%s\n", cp );

        v = sam3_reg_fieldname( pChip, "NVPTYP", pChip->cfg.CHIPID_CIDR, 28, 3 );
        sam3_sprintf( pChip, "%s\n", nvptype[ v ] );

        v = sam3_reg_fieldname( pChip, "EXTID", pChip->cfg.CHIPID_CIDR, 31, 1 );
        sam3_sprintf(pChip, "(exists: %s)\n", _yes_or_no(v));
}

static void 
sam3_explain_ckgr_mcfr( struct sam3_chip *pChip )
{
        uint32_t v;

        
        v = sam3_reg_fieldname( pChip, "MAINFRDY", pChip->cfg.CKGR_MCFR, 16, 1 );
        sam3_sprintf( pChip, "(main ready: %s)\n", _yes_or_no( v ));

        v = sam3_reg_fieldname( pChip, "MAINF", pChip->cfg.CKGR_MCFR, 0, 16 );
        
        v = (v * pChip->cfg.slow_freq) / 16;
        pChip->cfg.mainosc_freq = v;

        sam3_sprintf(pChip, "(%3.03f Mhz (%d.%03dkhz slowclk)\n",
                                 _tomhz( v ),
                                 pChip->cfg.slow_freq / 1000,
                                 pChip->cfg.slow_freq % 1000);

}

static void
sam3_explain_ckgr_plla( struct sam3_chip *pChip )
{
        uint32_t mula,diva;

        diva = sam3_reg_fieldname( pChip, "DIVA", pChip->cfg.CKGR_PLLAR, 0, 8 );
        sam3_sprintf(pChip,"\n");
        mula = sam3_reg_fieldname( pChip, "MULA", pChip->cfg.CKGR_PLLAR, 16, 11 );
        sam3_sprintf(pChip,"\n");
        pChip->cfg.plla_freq = 0;
        if ( mula==0 ){
                sam3_sprintf(pChip,"\tPLLA Freq: (Disabled,mula=0)\n");
        } else if ( diva == 0 ){
                sam3_sprintf(pChip,"\tPLLA Freq: (Disabled,diva=0)\n");
        } else if ( diva == 1 ){
                pChip->cfg.plla_freq = (pChip->cfg.mainosc_freq * (mula+1));
                sam3_sprintf(pChip,"\tPLLA Freq: %3.03f MHz\n",
                                         _tomhz( pChip->cfg.plla_freq ));
        }
}
                
                
static void
sam3_explain_mckr( struct sam3_chip *pChip )
{
        uint32_t css, pres,fin;
        int pdiv;
        const char *cp;

        css = sam3_reg_fieldname( pChip, "CSS", pChip->cfg.PMC_MCKR, 0, 2 );
        switch ( css & 3 ){
        case 0:
                fin = pChip->cfg.slow_freq;
                cp = "slowclk";
                break;
        case 1:
                fin = pChip->cfg.mainosc_freq;
                cp  = "mainosc";
                break;
        case 2:
                fin = pChip->cfg.plla_freq;
                cp  = "plla";
                break;
        case 3:
                if ( pChip->cfg.CKGR_UCKR & (1 << 16) ){
                        fin = 480 * 1000 * 1000;
                        cp = "upll";
                } else {
                        fin = 0;
                        cp  = "upll (*ERROR* UPLL is disabled)";
                }
                break;
        }

        sam3_sprintf( pChip, "%s (%3.03f Mhz)\n",
                                  cp, 
                                  _tomhz( fin ) );
        pres = sam3_reg_fieldname(pChip, "PRES", pChip->cfg.PMC_MCKR, 4, 3 );
        switch ( pres & 0x07 ){
        case 0:
                pdiv = 1;
                cp = "selected clock";
        case 1:
                pdiv = 2;
                cp = "clock/2";
                break;
        case 2:
                pdiv = 4;
                cp = "clock/4";
                break;
        case 3:
                pdiv = 8;
                cp = "clock/8";
                break;
        case 4:
                pdiv = 16;
                cp = "clock/16";
                break;
        case 5:
                pdiv = 32;
                cp = "clock/32";
                break;
        case 6:
                pdiv = 64;
                cp = "clock/64";
                break;
        case 7:
                pdiv = 6;
                cp = "clock/6";
                break;
        }
        sam3_sprintf( pChip, "(%s)\n", cp );
        fin = fin / pdiv;
        // sam3 has a *SINGLE* clock - 
        // other at91 series parts have divisors for these.
        pChip->cfg.cpu_freq = fin;
        pChip->cfg.mclk_freq = fin;
        pChip->cfg.fclk_freq = fin;
        sam3_sprintf( pChip, "\t\tResult CPU Freq: %3.03f\n",
                                  _tomhz( fin ) );
}
        
#if 0
static struct sam3_chip *
target2sam3( target_t *pTarget )
{
        struct sam3_chip *pChip;

        if (pTarget == NULL ){
                return NULL;
        }

        pChip = all_sam3_chips;
        while (pChip){
                if (pChip->target == pTarget ){
                        break; // return below
                } else {
                        pChip = pChip->next;
                }
        }
        return pChip;
}
#endif

static uint32_t *
sam3_get_reg_ptr( struct sam3_cfg *pCfg, const struct sam3_reg_list *pList )
{
        // this function exists to help 
        // keep funky offsetof() errors
        // and casting from causing bugs

        // By using prototypes - we can detect what would
        // be casting errors.

        return ((uint32_t *)(  ((char *)(pCfg)) + pList->struct_offset ));
}
        
        
#define SAM3_ENTRY( NAME, FUNC )  { .address = SAM3_ ## NAME, .struct_offset = offsetof( struct sam3_cfg, NAME ), #NAME, FUNC }
static const struct sam3_reg_list sam3_all_regs[] = {
        SAM3_ENTRY( CKGR_MOR , sam3_explain_ckgr_mor ),
        SAM3_ENTRY( CKGR_MCFR , sam3_explain_ckgr_mcfr ),
        SAM3_ENTRY( CKGR_PLLAR , sam3_explain_ckgr_plla ),
        SAM3_ENTRY( CKGR_UCKR , NULL ),
        SAM3_ENTRY( PMC_FSMR , NULL ),
        SAM3_ENTRY( PMC_FSPR , NULL ),
        SAM3_ENTRY( PMC_IMR , NULL ),
        SAM3_ENTRY( PMC_MCKR , sam3_explain_mckr ),
        SAM3_ENTRY( PMC_PCK0 , NULL ),
        SAM3_ENTRY( PMC_PCK1 , NULL ),
        SAM3_ENTRY( PMC_PCK2 , NULL ),
        SAM3_ENTRY( PMC_PCSR , NULL ),
        SAM3_ENTRY( PMC_SCSR , NULL ),
        SAM3_ENTRY( PMC_SR , NULL ),
        SAM3_ENTRY( CHIPID_CIDR , sam3_explain_chipid_cidr ),
        SAM3_ENTRY( CHIPID_EXID , NULL ),
        SAM3_ENTRY( SUPC_CR, NULL ),

        // TERMINATE THE LIST
        { .name = NULL }
};
#undef SAM3_ENTRY




static struct sam3_bank_private *
get_sam3_bank_private( flash_bank_t *bank )
{
        return (struct sam3_bank_private *)(bank->driver_priv);
}

/*
 * Given a pointer to where it goes in the structure..
 *    Determine the register name, address from the all registers table.
 */
static const struct sam3_reg_list *
sam3_GetReg( struct sam3_chip *pChip, uint32_t *goes_here )
{
        const struct sam3_reg_list *pReg;

        pReg = &(sam3_all_regs[0]);
        while (pReg->name){
                uint32_t *pPossible;

                // calculate where this one go..
                // it is "possibly" this register.
                
                pPossible = ((uint32_t *)( ((char *)(&(pChip->cfg))) + pReg->struct_offset ));

                // well? Is it this register
                if ( pPossible == goes_here ){
                        // Jump for joy!
                        return pReg;
                }

                // next...
                pReg++;
        }
        // This is *TOTAL*PANIC* - we are totally screwed.
        LOG_ERROR("INVALID SAM3 REGISTER");
        return NULL;
}


static int
sam3_ReadThisReg( struct sam3_chip *pChip, uint32_t *goes_here )
{
        const struct sam3_reg_list *pReg;
        int r;

        pReg = sam3_GetReg( pChip, goes_here );
        if ( !pReg ){
                return ERROR_FAIL;
        }

        r = target_read_u32( pChip->target, pReg->address, goes_here );
        if ( r != ERROR_OK ){
                LOG_ERROR("Cannot read SAM3 register: %s @ 0x%08x, Err: %d\n",
                                  pReg->name, (unsigned)(pReg->address), r );
        }
        return r;
}
                
        

static int
sam3_ReadAllRegs( struct sam3_chip *pChip )
{
        int r;
        const struct sam3_reg_list *pReg;

        pReg = &(sam3_all_regs[0]);
        while ( pReg->name ){
                r = sam3_ReadThisReg( pChip, 
                                                                  sam3_get_reg_ptr( &(pChip->cfg), pReg ) );
                if ( r != ERROR_OK ){
                        LOG_ERROR("Cannot read SAM3 registere: %s @ 0x%08x, Error: %d\n",
                                          pReg->name, ((unsigned)(pReg->address)), r );
                        return r;
                }
                
                pReg++;
        }

        return ERROR_OK;
}


static int
sam3_GetInfo( struct sam3_chip *pChip )
{
        const struct sam3_reg_list *pReg;
        uint32_t regval;

        membuf_reset( pChip->mbuf );


        pReg = &(sam3_all_regs[0]);
        while (pReg->name){
                // display all regs
                LOG_DEBUG("Start: %s", pReg->name );
                regval = *sam3_get_reg_ptr( &(pChip->cfg), pReg );
                sam3_sprintf(pChip, "%*s: [0x%08x] -> 0x%08x\n", 
                                         REG_NAME_WIDTH,
                                         pReg->name,
                                         pReg->address,
                                         regval );
                if ( pReg->explain_func ){
                        (*(pReg->explain_func))( pChip );
                }
                LOG_DEBUG("End: %s", pReg->name );
                pReg++;
        }
        sam3_sprintf(pChip,"   rc-osc: %3.03f MHz\n", _tomhz( pChip->cfg.rc_freq                ));
        sam3_sprintf(pChip,"  mainosc: %3.03f MHz\n", _tomhz( pChip->cfg.mainosc_freq   ));
        sam3_sprintf(pChip,"     plla: %3.03f MHz\n", _tomhz( pChip->cfg.plla_freq              ));
        sam3_sprintf(pChip," cpu-freq: %3.03f MHz\n", _tomhz( pChip->cfg.cpu_freq               ));
        sam3_sprintf(pChip,"mclk-freq: %3.03f MHz\n", _tomhz( pChip->cfg.mclk_freq              ));     


        sam3_sprintf( pChip, " UniqueId: 0x%08x 0x%08x 0x%08x 0x%08x\n",
                                  pChip->cfg.unique_id[0],
                                  pChip->cfg.unique_id[1],
                                  pChip->cfg.unique_id[2],
                                  pChip->cfg.unique_id[3]);

        
        return ERROR_OK;
}

        
static int 
sam3_erase_check(struct flash_bank_s *bank)
{
        int x;

        LOG_DEBUG("Here");
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }
        if ( 0 == bank->num_sectors ){
                LOG_ERROR("Target: not supported/not probed\n");
                return ERROR_FAIL;
        }

        LOG_INFO("sam3 - supports auto-erase, erase_check ignored");
        for( x = 0 ; x < bank->num_sectors ; x++ ){
                bank->sectors[x].is_erased = 1;
        }

        LOG_DEBUG("Done");
        return ERROR_OK;
}

static int 
sam3_protect_check(struct flash_bank_s *bank)
{
        int r;
        uint32_t v;
        unsigned x;
        struct sam3_bank_private *pPrivate;

        LOG_DEBUG("Begin");
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }

        pPrivate = get_sam3_bank_private(bank);
        if ( !pPrivate ){
                LOG_ERROR("no private for this bank?");
                return ERROR_FAIL;
        }
        if ( !(pPrivate->probed) ){
                return ERROR_FLASH_BANK_NOT_PROBED;
        }
        
        r = FLASHD_GetLockBits( pPrivate , &v );
        if ( r != ERROR_OK ){
                LOG_DEBUG("Failed: %d",r);
                return r;
        }

        for( x = 0 ; x < pPrivate->nsectors ; x++ ){
                bank->sectors[x].is_protected = (!!(v & (1 << x)));
        }
        LOG_DEBUG("Done");
        return ERROR_OK;
}

static int 
sam3_flash_bank_command(struct command_context_s *cmd_ctx, 
                            char *cmd, 
                            char **args, 
                            int argc, 
                            struct flash_bank_s *bank)
{
        struct sam3_chip *pChip;

        pChip = all_sam3_chips;
        
        // is this an existing chip?
        while (pChip){
                if ( pChip->target == bank->target ){
                        break;
                }
                pChip = pChip->next;
        }

        if ( !pChip ){
                // this is a *NEW* chip
                pChip = calloc( 1, sizeof(struct sam3_chip) );
                if ( !pChip ){
                        LOG_ERROR("NO RAM!");
                        return ERROR_FAIL;
                }
                pChip->target = bank->target;
                // insert at head
                pChip->next = all_sam3_chips;
                all_sam3_chips = pChip;
                pChip->target = bank->target;
                // assumption is this runs at 32khz
                pChip->cfg.slow_freq = 32768;
                pChip->probed = 0;
                pChip->mbuf = membuf_new();
                if ( !(pChip->mbuf) ){
                        LOG_ERROR("no memory");
                        return ERROR_FAIL;
                }
        }
        
        switch ( bank->base ){
        default:
                LOG_ERROR("Address 0x%08x invalid bank address (try 0x%08x or 0x%08x)",
                                  ((unsigned int)(bank->base)),
                                  ((unsigned int)(FLASH_BANK0_BASE)),
                                  ((unsigned int)(FLASH_BANK1_BASE)));
                return ERROR_FAIL;
                break;
        case FLASH_BANK0_BASE:
                bank->driver_priv = &(pChip->details.bank[0]);
                bank->bank_number = 0;
                pChip->details.bank[0].pChip = pChip;
                pChip->details.bank[0].pBank = bank;
                break;
        case FLASH_BANK1_BASE:
                bank->driver_priv = &(pChip->details.bank[1]);
                bank->bank_number = 1;
                pChip->details.bank[1].pChip = pChip;
                pChip->details.bank[1].pBank = bank;
                break;
        }

        // we initialize after probing.
        return ERROR_OK;
}

static int
sam3_GetDetails( struct sam3_bank_private *pPrivate )
{
        const struct sam3_chip_details *pDetails;
        struct sam3_chip *pChip;
        void *vp;
        flash_bank_t *saved_banks[SAM3_MAX_FLASH_BANKS];

        unsigned x;
        const char *cp;

        LOG_DEBUG("Begin");
        pDetails = all_sam3_details;
        while ( pDetails->name ){
                if ( pDetails->chipid_cidr == pPrivate->pChip->cfg.CHIPID_CIDR ){
                        break;
                } else {
                        pDetails++;
                }
        }
        if ( pDetails->name == NULL ){
                LOG_ERROR("SAM3 ChipID 0x%08x not found in table (perhaps you can this chip?)", 
                                  (unsigned int)(pPrivate->pChip->cfg.CHIPID_CIDR) );
                // Help the victim, print details about the chip
                membuf_reset( pPrivate->pChip->mbuf );
                membuf_sprintf( pPrivate->pChip->mbuf, 
                                                "SAM3 CHIPID_CIDR: 0x%08x decodes as follows\n",
                                                pPrivate->pChip->cfg.CHIPID_CIDR );
                sam3_explain_chipid_cidr( pPrivate->pChip );
                cp = membuf_strtok( pPrivate->pChip->mbuf, "\n", &vp );
                while (cp){
                        LOG_INFO("%s", cp );
                        cp = membuf_strtok( NULL, "\n", &vp );
                }
                return ERROR_FAIL;
        }

        // DANGER: THERE ARE DRAGONS HERE

        // get our pChip - it is going
        // to be over-written shortly
        pChip = pPrivate->pChip;

        // Note that, in reality:
        //
        //     pPrivate = &(pChip->details.bank[0])
        // or  pPrivate = &(pChip->details.bank[1])
        //

        // save the "bank" pointers
        for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
                saved_banks[ x ] = pChip->details.bank[x].pBank;
        }

        // Overwrite the "details" structure.
        memcpy( &(pPrivate->pChip->details), 
                        pDetails, 
                        sizeof(pPrivate->pChip->details));

        // now fix the ghosted pointers
        for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
                pChip->details.bank[x].pChip = pChip;
                pChip->details.bank[x].pBank = saved_banks[x];
        }

        // update the *BANK*SIZE* 

        LOG_DEBUG("End");
        return ERROR_OK;
}               
                                  


static int 
_sam3_probe(struct flash_bank_s *bank, int noise)
{
        unsigned x;
        int r;
        struct sam3_bank_private *pPrivate;


        LOG_DEBUG("Begin: Bank: %d, Noise: %d", bank->bank_number, noise );
        if (bank->target->state != TARGET_HALTED)
        {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }

        pPrivate = get_sam3_bank_private( bank );
        if ( !pPrivate ){
                LOG_ERROR("Invalid/unknown bank number\n");
                return ERROR_FAIL;
        }

        r = sam3_ReadAllRegs(pPrivate->pChip);
        if ( r != ERROR_OK ){
                return r;
        }

        
        LOG_DEBUG("Here");
        r = sam3_GetInfo( pPrivate->pChip );
        if ( r != ERROR_OK ){
                return r;
        }
        if ( !(pPrivate->pChip->probed) ){
                pPrivate->pChip->probed = 1;
                LOG_DEBUG("Here");
                r = sam3_GetDetails( pPrivate );
                if ( r != ERROR_OK ){
                        return r;
                }               
        }

        // update the flash bank size
        for( x = 0 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
                if ( bank->base == pPrivate->pChip->details.bank[0].base_address ){
                        bank->size =  pPrivate->pChip->details.bank[0].size_bytes;
                        break;
                }
        }

        if ( bank->sectors == NULL ){
                bank->sectors     = calloc(pPrivate->nsectors, (sizeof( (bank->sectors)[0] )));
                if ( bank->sectors == NULL ){
                        LOG_ERROR("No memory!");
                        return ERROR_FAIL;
                }
                bank->num_sectors = pPrivate->nsectors;
                        
                for( x = 0 ; ((int)(x)) < bank->num_sectors ; x++ ){
                        bank->sectors[x].size         = pPrivate->sector_size;
                        bank->sectors[x].offset       = x * (pPrivate->sector_size);
                        // mark as unknown
                        bank->sectors[x].is_erased    = -1;
                        bank->sectors[x].is_protected = -1;
                }
        }

        pPrivate->probed = 1;

        r = sam3_protect_check( bank );
        if ( r != ERROR_OK ){
                return r;
        }

        LOG_DEBUG("Bank = %d, nbanks = %d",
                          pPrivate->bank_number , pPrivate->pChip->details.n_banks);
        if ( (pPrivate->bank_number+1) == pPrivate->pChip->details.n_banks ){
                // read unique id, 
                // it appears to be associated with the *last* flash bank.
                FLASHD_ReadUniqueID(pPrivate);
        }

        return r;
}

static int 
sam3_probe(struct flash_bank_s *bank)
{
        return _sam3_probe( bank, 1 );
}

static int 
sam3_auto_probe(struct flash_bank_s *bank)
{
        return _sam3_probe( bank, 0 );
}



static int 
sam3_erase(struct flash_bank_s *bank, int first, int last)
{
        struct sam3_bank_private *pPrivate;
        int r;

        LOG_DEBUG("Here");
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }

        r = sam3_auto_probe( bank );
        if ( r != ERROR_OK ){
                LOG_DEBUG("Here,r=%d",r);
                return r;
        }

        pPrivate = get_sam3_bank_private( bank );
        if ( !(pPrivate->probed) ){
                return ERROR_FLASH_BANK_NOT_PROBED;
        }

        if ( (first == 0) && ((last+1)== ((int)(pPrivate->nsectors))) ){
                // whole chip
                LOG_DEBUG("Here");
                return FLASHD_EraseEntireBank( pPrivate );
        }
        LOG_INFO("sam3 auto-erases while programing (request ignored)");
        return ERROR_OK;
}

static int 
sam3_protect(struct flash_bank_s *bank, int set, int first, int last)
{
        struct sam3_bank_private *pPrivate;
        int r;

        LOG_DEBUG("Here");
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }

        pPrivate = get_sam3_bank_private( bank );
        if ( !(pPrivate->probed) ){
                return ERROR_FLASH_BANK_NOT_PROBED;
        }

        if ( set ){
                r = FLASHD_Lock( pPrivate, (unsigned)(first), (unsigned)(last));
        } else {
                r = FLASHD_Unlock( pPrivate, (unsigned)(first), (unsigned)(last));
        }
        LOG_DEBUG("End: r=%d",r);

        return r;
                
}


static int
sam3_info( flash_bank_t *bank, char *buf, int buf_size )
{
        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }
        buf[ 0 ] = 0;
        return ERROR_OK;
}

static int
sam3_page_read( struct sam3_bank_private *pPrivate, unsigned pagenum, uint8_t *buf )
{
        uint32_t adr;
        int r;

        adr = pagenum * pPrivate->page_size;
        adr += adr + pPrivate->base_address;

        r = target_read_memory( pPrivate->pChip->target, 
                                                        adr,
                                                        4, /* THIS*MUST*BE* in 32bit values */
                                                        pPrivate->page_size / 4,
                                                        buf );
        if ( r != ERROR_OK ){
                LOG_ERROR("SAM3: Flash program failed to read page phys address: 0x%08x", (unsigned int)(adr) );
        }
        return r;
}

// The code below is basically this:
// compiled with
// arm-none-eabi-gcc -mthumb -mcpu=cortex-m3 -O9 -S ./foobar.c -o foobar.s
//
// Only the *CPU* can write to the flash buffer.
// the DAP cannot... so - we download this 28byte thing
// Run the algorithm - (below)
// to program the device
// 
// ========================================
// #include <stdint.h>
// 
// struct foo { 
//   uint32_t *dst;
//   const uint32_t *src;
//   int   n;
//   volatile uint32_t *base;
//   uint32_t   cmd;
// };
//
// 
// uint32_t sam3_function( struct foo *p )
// {
//   volatile uint32_t *v;
//   uint32_t *d;
//   const uint32_t *s;
//   int   n;
//   uint32_t r;
// 
//   d = p->dst;
//   s = p->src;
//   n = p->n;
// 
//   do {
//     *d++ = *s++;
//   } while ( --n )
//     ;
// 
//   v = p->base;
//   
//   v[ 1 ] = p->cmd;
//   do {
//     r = v[8/4];
//   } while ( !(r&1) )
//     ;
//   return r;
// }
// ========================================



static const uint8_t 
sam3_page_write_opcodes[] = {
        //  24 0000 0446                mov     r4, r0
        0x04,0x46,
        //  25 0002 6168                ldr     r1, [r4, #4]
        0x61,0x68,
        //  26 0004 0068                ldr     r0, [r0, #0]
        0x00,0x68,
        //  27 0006 A268                ldr     r2, [r4, #8]
        0xa2,0x68,
        //  28                          @ lr needed for prologue
        //  29                  .L2:
        //  30 0008 51F8043B            ldr     r3, [r1], #4
        0x51,0xf8,0x04,0x3b,
        //  31 000c 12F1FF32            adds    r2, r2, #-1
        0x12,0xf1,0xff,0x32,
        //  32 0010 40F8043B            str     r3, [r0], #4
        0x40,0xf8,0x04,0x3b,
        //  33 0014 F8D1                bne     .L2
        0xf8,0xd1,
        //  34 0016 E268                ldr     r2, [r4, #12]
        0xe2,0x68,
        //  35 0018 2369                ldr     r3, [r4, #16]
        0x23,0x69,
        //  36 001a 5360                str     r3, [r2, #4]
        0x53,0x60,
        //  37 001c 0832                adds    r2, r2, #8
        0x08,0x32,
        //  38                  .L4:
        //  39 001e 1068                ldr     r0, [r2, #0]
        0x10,0x68,
        //  40 0020 10F0010F            tst     r0, #1
        0x10,0xf0,0x01,0x0f,
        //  41 0024 FBD0                beq     .L4
        0xfb,0xd0,
        //  42                  .done:
        //  43 0026 FEE7                b       .done
        0xfe,0xe7
};


static int
sam3_page_write( struct sam3_bank_private *pPrivate, unsigned pagenum, uint8_t *buf )
{
        uint32_t adr;
        uint32_t status;
        int r;

        adr = pagenum * pPrivate->page_size;
        adr += (adr + pPrivate->base_address);

        LOG_DEBUG("Wr Page %u @ phys address: 0x%08x", pagenum, (unsigned int)(adr) );
        r = target_write_memory( pPrivate->pChip->target, 
                                                         adr,
                                                         4, /* THIS*MUST*BE* in 32bit values */
                                                         pPrivate->page_size / 4,
                                                         buf );
        if ( r != ERROR_OK ){
                LOG_ERROR("SAM3: Failed to write (buffer) page at phys address 0x%08x", (unsigned int)(adr) );
                return r;
        }

        r = EFC_PerformCommand( pPrivate,
                                                        // send Erase & Write Page
                                                        AT91C_EFC_FCMD_EWP,
                                                        pagenum,
                                                        &status );

        if ( r != ERROR_OK ){
                LOG_ERROR("SAM3: Error performing Erase & Write page @ phys address 0x%08x", (unsigned int)(adr) );
        }
        if ( status & (1 << 2) ){
                LOG_ERROR("SAM3: Page @ Phys address 0x%08x is locked", (unsigned int)(adr) );
                return ERROR_FAIL;
        }
        if ( status & (1 << 1) ){
                LOG_ERROR("SAM3: Flash Command error @phys address 0x%08x", (unsigned int)(adr) );
                return ERROR_FAIL;
        }
        return ERROR_OK;
}
                                                
                                                
                                                
                                  

static int 
sam3_write(struct flash_bank_s *bank, 
                   uint8_t *buffer, 
                   uint32_t offset, 
                   uint32_t count)
{
        int n;
        unsigned page_cur;
        unsigned page_end;
        int r;
        unsigned page_offset;
        struct sam3_bank_private *pPrivate;
        uint8_t *pagebuffer;

        // ignore dumb requests
        if ( count == 0 ){
                return ERROR_OK;
        }

        if (bank->target->state != TARGET_HALTED) {
                LOG_ERROR("Target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }

        pPrivate = get_sam3_bank_private(bank);
        if ( !(pPrivate->probed) ){
                return ERROR_FLASH_BANK_NOT_PROBED;
        }


        if ( (offset + count) > pPrivate->size_bytes ){
                LOG_ERROR("Flash write error - past end of bank");
                LOG_ERROR(" offset: 0x%08x, count 0x%08x, BankEnd: 0x%08x",
                                  (unsigned int)(offset), 
                                  (unsigned int)(count),
                                  (unsigned int)(pPrivate->size_bytes) );
                return ERROR_FAIL;
        }

        pagebuffer = alloca( pPrivate->page_size );
                
        // what page do we start & end in?
        page_cur = offset / pPrivate->page_size;
        page_end = (offset + count - 1) / pPrivate->page_size;
        
        LOG_DEBUG("Offset: 0x%08x, Count: 0x%08x", (unsigned int)(offset), (unsigned int)(count));
        LOG_DEBUG("Page start: %d, Page End: %d", (int)(page_cur), (int)(page_end) );
                          
        // Special case: all one page
        //
        // Otherwise:
        //    (1) non-aligned start
        //    (2) body pages
        //    (3) non-aligned end.
        
        // Handle special case - all one page.
        if ( page_cur == page_end ){
                LOG_DEBUG("Special case, all in one page");
                r = sam3_page_read( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }
                
                page_offset = (offset & (pPrivate->page_size-1));
                memcpy( pagebuffer + page_offset,
                                buffer,
                                count );
                
                r = sam3_page_write( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }
                return ERROR_OK;
        }

        // non-aligned start
        page_offset = offset & (pPrivate->page_size - 1);
        if ( page_offset ){
                LOG_DEBUG("Not-Aligned start");
                // read the partial
                r = sam3_page_read( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }

                // over-write with new data
                n = (pPrivate->page_size - page_offset );
                memcpy( pagebuffer + page_offset,
                                buffer,
                                n );
        
                r = sam3_page_write( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }

                count  -= n;
                offset += n;
                buffer += n;
                page_cur++;
        }

        // intermediate large pages
        // also - the final *terminal* 
        // if that terminal page is a full page
        LOG_DEBUG("Full Page Loop: cur=%d, end=%d, count=0x%08x", 
                          (int)page_cur, (int)page_end, (unsigned int)(count) );

        while ( (page_cur < page_end) && 
                   (count >= pPrivate->page_size) ){
                r = sam3_page_write( pPrivate, page_cur, buffer );
                if ( r != ERROR_OK ){
                        return r;
                }
                count    -= pPrivate->page_size;
                buffer   += pPrivate->page_size;
                page_cur += 1;
        }

        // terminal partial page?
        if ( count ){
                LOG_DEBUG("Terminal partial page, count=0x%08x", (unsigned int)(count));
                // we have a partial page
                r = sam3_page_read( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }
                // data goes at start
                memcpy( pagebuffer, buffer, count );
                r = sam3_page_write( pPrivate, page_cur, pagebuffer );
                if ( r != ERROR_OK ){
                        return r;
                }
                buffer += count;
                count  -= count;
        }
        LOG_DEBUG("Done!");
        return ERROR_OK;
}

static int
sam3_handle_info_command(  struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc )
{
        struct sam3_chip *pChip;
        void *vp;
        const char *cp;
        unsigned x;
        int r;

        pChip = get_current_sam3(cmd_ctx);
        if ( !pChip ){
                return ERROR_OK;
        }

        r = 0;
        
        // bank0 must exist before we can do anything
        if ( pChip->details.bank[0].pBank == NULL ){
                x = 0;
        need_define:
                command_print( cmd_ctx, 
                                           "Please define bank %d via command: flash bank %s ... ", 
                                           x,
                                           at91sam3_flash.name );
                return ERROR_FAIL;
        }

        // if bank 0 is not probed, then probe it
        if ( !(pChip->details.bank[0].probed) ){
                r = sam3_auto_probe( pChip->details.bank[0].pBank );
                if ( r != ERROR_OK ){
                        return ERROR_FAIL;
                }
        }
        // above garentees the "chip details" structure is valid
        // and thus, bank private areas are valid
        // and we have a SAM3 chip, what a concept! 
                

        // auto-probe other banks, 0 done above
    for( x = 1 ; x < SAM3_MAX_FLASH_BANKS ; x++ ){
                // skip banks not present
                if ( !(pChip->details.bank[x].present) ){
                        continue;
                }
                
                if ( pChip->details.bank[x].pBank == NULL ){
                        goto need_define;
                }

                if ( pChip->details.bank[x].probed ){
                        continue;
                }
                
                r = sam3_auto_probe( pChip->details.bank[x].pBank );
                if ( r != ERROR_OK ){
                        return r;
                }
        }
                        

        r = sam3_GetInfo( pChip );
        if ( r != ERROR_OK ){
                LOG_DEBUG("Sam3Info, Failed %d\n",r);
                return r;
        }
        

        // print results
        cp = membuf_strtok( pChip->mbuf, "\n", &vp );
        while (cp){
                command_print(cmd_ctx,"%s", cp );
                cp = membuf_strtok( NULL, "\n", &vp );
        }
        return ERROR_OK;
}

static int
sam3_handle_gpnvm_command( struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc)
{
        unsigned x,v;
        uint32_t v32;
        int r,who;
        struct sam3_chip *pChip;

        pChip = get_current_sam3(cmd_ctx);
        if ( !pChip ){
                return ERROR_OK;
        }

        if ( pChip->target->state != TARGET_HALTED ){
                LOG_ERROR("sam3 - target not halted");
                return ERROR_TARGET_NOT_HALTED;
        }


        if ( pChip->details.bank[0].pBank == NULL ){
                command_print( cmd_ctx, "Bank0 must be defined first via: flash bank %s ...",
                                           at91sam3_flash.name );
                return ERROR_FAIL;
        }
        if ( !pChip->details.bank[0].probed ){
                r = sam3_auto_probe( pChip->details.bank[0].pBank );
                if ( r != ERROR_OK ){
                        return r;
                }
        }


        switch ( argc ){
        default:
                command_print(cmd_ctx,"Too many parameters\n");
                return ERROR_COMMAND_SYNTAX_ERROR;
                break;
        case 0:
                who = -1;
                goto showall;
                break;
        case 1:
                who = -1;
                break;
        case 2:
                if ( (0 == strcmp( argv[0], "show" )) && (0 == strcmp( argv[1], "all" )) ){
                        who = -1;
                } else {
                        r = parse_u32( argv[1], &v32 );
                        if ( r != ERROR_OK ){
                                command_print( cmd_ctx, "Not a number: %s", argv[1] );
                                return r;
                        }
                        who = v32;
                }
                break;
        }

        if ( 0 == strcmp( "show", argv[0] ) ){
                if ( who == -1 ){
                showall:
                        for( x = 0 ; x < pChip->details.n_gpnvms ; x++ ){
                                r = FLASHD_GetGPNVM( &(pChip->details.bank[0]), x, &v );
                                if ( r != ERROR_OK ){
                                        break;
                                }
                                command_print(cmd_ctx, "sam3-gpnvm%u: %u", x, v );
                        }
                        return r;
                }
                if ( (who >= 0) && (((unsigned)(who)) < pChip->details.n_gpnvms) ){
                        r = FLASHD_GetGPNVM( &(pChip->details.bank[0]), who, &v );
                        command_print(cmd_ctx, "sam3-gpnvm%u: %u", who, v );
                        return r;
                } else {
                        command_print(cmd_ctx, "sam3-gpnvm invalid GPNVM: %u", who );
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
        }

        if ( who == -1 ){
                command_print( cmd_ctx, "Missing GPNVM number");
                return ERROR_COMMAND_SYNTAX_ERROR;
        }
        
        if ( 0 == strcmp( "set", argv[0] ) ){
                r = FLASHD_SetGPNVM( &(pChip->details.bank[0]), who );
        } else if ( (0 == strcmp( "clr", argv[0] )) ||
                           (0 == strcmp( "clear", argv[0])) ){ // quietly accept both
                r = FLASHD_ClrGPNVM( &(pChip->details.bank[0]), who );
        } else {
                command_print( cmd_ctx, "Unkown command: %s", argv[0] );
                r = ERROR_COMMAND_SYNTAX_ERROR;
        }
        return r;
}

static int 
sam3_handle_slowclk_command( struct command_context_s *cmd_ctx, char *cmd, char **argv, int argc)
{
        uint32_t v;
        int r;

        struct sam3_chip *pChip;

        pChip = get_current_sam3(cmd_ctx);
        if ( !pChip ){
                return ERROR_OK;
        }


        switch ( argc ){
        case 0:
                // show
                break;
        case 1:
                // set
                r = parse_u32( argv[0], &v );
                if ( v > 200000 ){
                        // absurd slow clock of 200Khz?
                        command_print(cmd_ctx,"Absurd/illegal slow clock freq: %d\n", (int)(v));
                        return ERROR_COMMAND_SYNTAX_ERROR;
                }
                pChip->cfg.slow_freq = v;
                break;
                
        default:
                // error
                command_print( cmd_ctx,"Too many parameters");
                return ERROR_COMMAND_SYNTAX_ERROR;
                break;
        }
        command_print( cmd_ctx, "Slowclk freq: %d.%03dkhz", 
                                   (int)(pChip->cfg.slow_freq/ 1000),
                                   (int)(pChip->cfg.slow_freq% 1000));
        return ERROR_OK;
}


static int sam3_registered;
static int
sam3_register_commands( struct command_context_s *cmd_ctx)
{
        command_t *pCmd;

        // only register once
        if ( !sam3_registered ){
                sam3_registered++;

                pCmd = register_command( cmd_ctx, NULL, "at91sam3", NULL, COMMAND_ANY, NULL );
                register_command( cmd_ctx, pCmd,
                                                  "gpnvm", 
                                                  sam3_handle_gpnvm_command, 
                                                  COMMAND_EXEC, 
                                                  "at91sam3 gpnvm [action [<BIT>], by default 'show', otherwise set|clear BIT");
                register_command( cmd_ctx, pCmd,
                                                  "info",
                                                  sam3_handle_info_command,
                                                  COMMAND_EXEC,
                                                  "at91sam3 info - print information about the current sam3 chip");
                register_command( cmd_ctx, pCmd,
                                                  "slowclk",
                                                  sam3_handle_slowclk_command,
                                                  COMMAND_EXEC,
                                                  "at91sam3 slowclk [VALUE] set the slowclock frequency (default 32768hz)");
        }
        return ERROR_OK;
}


flash_driver_t at91sam3_flash =
{
        .name                                           = "at91sam3",
        .register_commands                      = sam3_register_commands,
        
        .flash_bank_command                     = sam3_flash_bank_command,
        .erase                                          = sam3_erase,
        .protect                                        = sam3_protect,
        .write                                          = sam3_write,
        .probe                                          = sam3_probe,
        .auto_probe                                     = sam3_auto_probe,
        .erase_check                            = sam3_erase_check,
        .protect_check                          = sam3_protect_check,
        .info                                           = sam3_info
};



/**
 * Local Variables: **
 * mode: c **
 * c-basic-offset: 4 **
 * tab-width: 4 **
 * End: **
 */