[openocd.git] / src / flash / nor / kinetis.c

/***************************************************************************
 *   Copyright (C) 2011 by Mathias Kuester                                 *
 *   kesmtp@freenet.de                                                     *
 *                                                                         *
 *   Copyright (C) 2011 sleep(5) ltd                                       *
 *   tomas@sleepfive.com                                                   *
 *                                                                         *
 *   Copyright (C) 2012 by Christopher D. Kilgour                          *
 *   techie at whiterocker.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.             *
 ***************************************************************************/

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

#include "imp.h"
#include "helper/binarybuffer.h"

/*
 * Implementation Notes
 *
 * The persistent memories in the Kinetis chip families K10 through
 * K70 are all manipulated with the Flash Memory Module.  Some
 * variants call this module the FTFE, others call it the FTFL.  To
 * indicate that both are considered here, we use FTFX.
 *
 * Within the module, according to the chip variant, the persistent
 * memory is divided into what Freescale terms Program Flash, FlexNVM,
 * and FlexRAM.  All chip variants have Program Flash.  Some chip
 * variants also have FlexNVM and FlexRAM, which always appear
 * together.
 *
 * A given Kinetis chip may have 2 or 4 blocks of flash.  Here we map
 * each block to a separate bank.  Each block size varies by chip and
 * may be determined by the read-only SIM_FCFG1 register.  The sector
 * size within each bank/block varies by the chip granularity as
 * described below.
 *
 * Kinetis offers four different of flash granularities applicable
 * across the chip families.  The granularity is apparently reflected
 * by at least the reference manual suffix.  For example, for chip
 * MK60FN1M0VLQ12, reference manual K60P144M150SF3RM ends in "SF3RM",
 * where the "3" indicates there are four flash blocks with 4kiB
 * sectors.  All possible granularities are indicated below.
 *
 * The first half of the flash (1 or 2 blocks, depending on the
 * granularity) is always Program Flash and always starts at address
 * 0x00000000.  The "PFLSH" flag, bit 23 of the read-only SIM_FCFG2
 * register, determines whether the second half of the flash is also
 * Program Flash or FlexNVM+FlexRAM.  When PFLSH is set, the second
 * half of flash is Program Flash and is contiguous in the memory map
 * from the first half.  When PFLSH is clear, the second half of flash
 * is FlexNVM and always starts at address 0x10000000.  FlexRAM, which
 * is also present when PFLSH is clear, always starts at address
 * 0x14000000.
 *
 * The Flash Memory Module provides a register set where flash
 * commands are loaded to perform flash operations like erase and
 * program.  Different commands are available depending on whether
 * Program Flash or FlexNVM/FlexRAM is being manipulated.  Although
 * the commands used are quite consistent between flash blocks, the
 * parameters they accept differ according to the flash granularity.
 * Some Kinetis chips have different granularity between Program Flash
 * and FlexNVM/FlexRAM, so flash command arguments may differ between
 * blocks in the same chip.
 *
 * Although not documented as such by Freescale, it appears that bits
 * 8:7 of the read-only SIM_SDID register reflect the granularity
 * settings 0..3, so sector sizes and block counts are applicable
 * according to the following table.
 */
const struct {
        unsigned pflash_sector_size_bytes;
        unsigned nvm_sector_size_bytes;
        unsigned num_blocks;
} kinetis_flash_params[4] = {
        { 1<<10, 1<<10, 2 },
        { 2<<10, 1<<10, 2 },
        { 2<<10, 2<<10, 2 },
        { 4<<10, 4<<10, 4 }
};

struct kinetis_flash_bank {
        unsigned granularity;
        unsigned bank_ordinal;
        uint32_t sector_size;
        uint32_t protection_size;

        uint32_t sim_sdid;
        uint32_t sim_fcfg1;
        uint32_t sim_fcfg2;

        enum {
                FC_AUTO = 0,
                FC_PFLASH,
                FC_FLEX_NVM,
                FC_FLEX_RAM,
        } flash_class;
};

FLASH_BANK_COMMAND_HANDLER(kinetis_flash_bank_command)
{
        struct kinetis_flash_bank *bank_info;

        if (CMD_ARGC < 6)
                return ERROR_COMMAND_SYNTAX_ERROR;

        LOG_INFO("add flash_bank kinetis %s", bank->name);

        bank_info = malloc(sizeof(struct kinetis_flash_bank));

        memset(bank_info, 0, sizeof(struct kinetis_flash_bank));

        bank->driver_priv = bank_info;

        return ERROR_OK;
}

static int kinetis_protect(struct flash_bank *bank, int set, int first,
                           int last)
{
        LOG_WARNING("kinetis_protect not supported yet");
        /* FIXME: TODO */

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

        return ERROR_FLASH_BANK_INVALID;
}

static int kinetis_protect_check(struct flash_bank *bank)
{
        struct kinetis_flash_bank *kinfo = bank->driver_priv;

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

        if (kinfo->flash_class == FC_PFLASH) {
                int result;
                uint8_t buffer[4];
                uint32_t fprot, psec;
                int i, b;

                /* read protection register FTFx_FPROT */
                result = target_read_memory(bank->target, 0x40020010, 1, 4, buffer);

                if (result != ERROR_OK)
                        return result;

                fprot = target_buffer_get_u32(bank->target, buffer);

                /*
                 * Every bit protects 1/32 of the full flash (not necessarily
                 * just this bank), but we enforce the bank ordinals for
                 * PFlash to start at zero.
                 */
                b = kinfo->bank_ordinal * (bank->size / kinfo->protection_size);
                for (psec = 0, i = 0; i < bank->num_sectors; i++) {
                        if ((fprot >> b) & 1)
                                bank->sectors[i].is_protected = 0;
                        else
                                bank->sectors[i].is_protected = 1;

                        psec += bank->sectors[i].size;

                        if (psec >= kinfo->protection_size) {
                                psec = 0;
                                b++;
                        }
                }
        } else {
                LOG_ERROR("Protection checks for FlexNVM not yet supported");
                return ERROR_FLASH_BANK_INVALID;
        }

        return ERROR_OK;
}

static int kinetis_ftfx_command(struct flash_bank *bank, uint32_t w0,
                                uint32_t w1, uint32_t w2, uint8_t *ftfx_fstat)
{
        uint8_t buffer[12];
        int result, i;

        /* wait for done */
        for (i = 0; i < 50; i++) {
                result =
                        target_read_memory(bank->target, 0x40020000, 1, 1, buffer);

                if (result != ERROR_OK)
                        return result;

                if (buffer[0] & 0x80)
                        break;

                buffer[0] = 0x00;
        }

        if (buffer[0] != 0x80) {
                /* reset error flags */
                buffer[0] = 0x30;
                result =
                        target_write_memory(bank->target, 0x40020000, 1, 1, buffer);
                if (result != ERROR_OK)
                        return result;
        }

        target_buffer_set_u32(bank->target, buffer, w0);
        target_buffer_set_u32(bank->target, buffer + 4, w1);
        target_buffer_set_u32(bank->target, buffer + 8, w2);

        result = target_write_memory(bank->target, 0x40020004, 4, 3, buffer);

        if (result != ERROR_OK)
                return result;

        /* start command */
        buffer[0] = 0x80;
        result = target_write_memory(bank->target, 0x40020000, 1, 1, buffer);
        if (result != ERROR_OK)
                return result;

        /* wait for done */
        for (i = 0; i < 50; i++) {
                result =
                        target_read_memory(bank->target, 0x40020000, 1, 1, ftfx_fstat);

                if (result != ERROR_OK)
                        return result;

                if (*ftfx_fstat & 0x80)
                        break;
        }

        if ((*ftfx_fstat & 0xf0) != 0x80) {
                LOG_ERROR
                        ("ftfx command failed FSTAT: %02X W0: %08X W1: %08X W2: %08X",
                         *ftfx_fstat, w0, w1, w2);

                return ERROR_FLASH_OPERATION_FAILED;
        }

        return ERROR_OK;
}

static int kinetis_erase(struct flash_bank *bank, int first, int last)
{
        int result, i;
        uint32_t w0 = 0, w1 = 0, w2 = 0;

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

        if ((first > bank->num_sectors) || (last > bank->num_sectors))
                return ERROR_FLASH_OPERATION_FAILED;

        /*
         * FIXME: TODO: use the 'Erase Flash Block' command if the
         * requested erase is PFlash or NVM and encompasses the entire
         * block.  Should be quicker.
         */
        for (i = first; i <= last; i++) {
                uint8_t ftfx_fstat;
                /* set command and sector address */
                w0 = (0x09 << 24) | (bank->base + bank->sectors[i].offset);

                result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                if (result != ERROR_OK) {
                        LOG_WARNING("erase sector %d failed", i);
                        return ERROR_FLASH_OPERATION_FAILED;
                }

                bank->sectors[i].is_erased = 1;
        }

        if (first == 0) {
                LOG_WARNING
                        ("flash configuration field erased, please reset the device");
        }

        return ERROR_OK;
}

static int kinetis_write(struct flash_bank *bank, uint8_t *buffer,
                         uint32_t offset, uint32_t count)
{
        unsigned int i, result, fallback = 0;
        uint8_t buf[8];
        uint32_t wc, w0 = 0, w1 = 0, w2 = 0;
        struct kinetis_flash_bank *kinfo = bank->driver_priv;

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

        if (kinfo->flash_class == FC_FLEX_NVM) {
                uint8_t ftfx_fstat;

                LOG_DEBUG("flash write into FlexNVM @%08X", offset);

                /* make flex ram available */
                w0 = (0x81 << 24) | 0x00ff0000;

                result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                if (result != ERROR_OK)
                        return ERROR_FLASH_OPERATION_FAILED;

                /* check if ram ready */
                result = target_read_memory(bank->target, 0x40020001, 1, 1, buf);

                if (result != ERROR_OK)
                        return result;

                if (!(buf[0] & (1 << 1))) {
                        /* fallback to longword write */
                        fallback = 1;

                        LOG_WARNING("ram not ready, fallback to slow longword write (FCNFG: %02X)",
                                    buf[0]);
                }
        } else {
                LOG_DEBUG("flash write into PFLASH @08%X", offset);
        }


        /* program section command */
        if (fallback == 0) {
                unsigned prog_section_bytes = kinfo->sector_size >> 8;
                for (i = 0; i < count; i += kinfo->sector_size) {
                        /*
                         * The largest possible Kinetis "section" is
                         * 16 bytes.  A full Kinetis sector is always
                         * 256 "section"s.
                         */
                        uint8_t residual_buffer[16];
                        uint8_t ftfx_fstat;
                        uint32_t section_count = 256;
                        uint32_t residual_wc = 0;

                        /*
                         * Assume the word count covers an entire
                         * sector.
                         */
                        wc = kinfo->sector_size / 4;

                        /*
                         * If bytes to be programmed are less than the
                         * full sector, then determine the number of
                         * full-words to program, and put together the
                         * residual buffer so that a full "section"
                         * may always be programmed.
                         */
                        if ((count - i) < kinfo->sector_size) {
                                /* number of bytes to program beyond full section */
                                unsigned residual_bc = (count-i) % prog_section_bytes;

                                /* number of complete words to copy directly from buffer */
                                wc = (count - i) / 4;

                                /* number of total sections to write, including residual */
                                section_count = DIV_ROUND_UP((count-i), prog_section_bytes);

                                /* any residual bytes delivers a whole residual section */
                                residual_wc = (residual_bc ? prog_section_bytes : 0)/4;

                                /* clear residual buffer then populate residual bytes */
                                (void) memset(residual_buffer, 0xff, prog_section_bytes);
                                (void) memcpy(residual_buffer, &buffer[i+4*wc], residual_bc);
                        }

                        LOG_DEBUG("write section @ %08X with length %d bytes",
                                  offset + i, (count - i));

                        /* write data to flexram as whole-words */
                        result = target_write_memory(bank->target, 0x14000000, 4, wc,
                                                     buffer + i);

                        if (result != ERROR_OK) {
                                LOG_ERROR("target_write_memory failed");
                                return result;
                        }

                        /* write the residual words to the flexram */
                        if (residual_wc) {
                                result = target_write_memory(bank->target,
                                                             0x14000000+4*wc,
                                                             4, residual_wc,
                                                             residual_buffer);

                                if (result != ERROR_OK) {
                                        LOG_ERROR("target_write_memory failed");
                                        return result;
                                }
                        }

                        /* execute section-write command */
                        w0 = (0x0b << 24) | (bank->base + offset + i);
                        w1 = section_count << 16;

                        result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                        if (result != ERROR_OK)
                                return ERROR_FLASH_OPERATION_FAILED;
                }
        }
        /* program longword command, not supported in "SF3" devices */
        else if (kinfo->granularity != 3) {
                for (i = 0; i < count; i += 4) {
                        uint8_t ftfx_fstat;

                        LOG_DEBUG("write longword @ %08X", offset + i);

                        w0 = (0x06 << 24) | (bank->base + offset + i);
                        if (count - i < 4) {
                                uint32_t padding = 0xffffffff;
                                memcpy(&padding, buffer + i, count - i);
                                w1 = buf_get_u32(&padding, 0, 32);
                        } else {
                                w1 = buf_get_u32(buffer + i, 0, 32);
                        }

                        result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                        if (result != ERROR_OK)
                                return ERROR_FLASH_OPERATION_FAILED;
                }
        } else {
                LOG_ERROR("Flash write strategy not implemented");
                return ERROR_FLASH_OPERATION_FAILED;
        }

        return ERROR_OK;
}

static int kinetis_read_part_info(struct flash_bank *bank)
{
        int result, i;
        uint8_t buf[4];
        uint32_t offset = 0;
        uint8_t fcfg1_nvmsize, fcfg1_pfsize, fcfg1_eesize, fcfg2_pflsh;
        uint32_t nvm_size = 0, pf_size = 0, ee_size = 0;
        unsigned granularity, num_blocks = 0, num_pflash_blocks = 0, num_nvm_blocks = 0,
                first_nvm_bank = 0, reassign = 0;
        struct kinetis_flash_bank *kinfo = bank->driver_priv;

        result = target_read_memory(bank->target, 0x40048024, 1, 4, buf);
        if (result != ERROR_OK)
                return result;
        kinfo->sim_sdid = target_buffer_get_u32(bank->target, buf);
        granularity = (kinfo->sim_sdid >> 7) & 0x03;
        result = target_read_memory(bank->target, 0x4004804c, 1, 4, buf);
        if (result != ERROR_OK)
                return result;
        kinfo->sim_fcfg1 = target_buffer_get_u32(bank->target, buf);
        result = target_read_memory(bank->target, 0x40048050, 1, 4, buf);
        if (result != ERROR_OK)
                return result;
        kinfo->sim_fcfg2 = target_buffer_get_u32(bank->target, buf);
        fcfg2_pflsh = (kinfo->sim_fcfg2 >> 23) & 0x01;

        LOG_DEBUG("SDID: %08X FCFG1: %08X FCFG2: %08X", kinfo->sim_sdid,
                  kinfo->sim_fcfg1, kinfo->sim_fcfg2);

        fcfg1_nvmsize = (uint8_t)((kinfo->sim_fcfg1 >> 28) & 0x0f);
        fcfg1_pfsize = (uint8_t)((kinfo->sim_fcfg1 >> 24) & 0x0f);
        fcfg1_eesize = (uint8_t)((kinfo->sim_fcfg1 >> 16) & 0x0f);

        /* when the PFLSH bit is set, there is no FlexNVM/FlexRAM */
        if (!fcfg2_pflsh) {
                switch (fcfg1_nvmsize) {
                case 0x03:
                case 0x07:
                case 0x09:
                case 0x0b:
                        nvm_size = 1 << (14 + (fcfg1_nvmsize >> 1));
                        break;
                case 0x0f:
                        if (granularity == 3)
                                nvm_size = 512<<10;
                        else
                                nvm_size = 256<<10;
                        break;
                default:
                        nvm_size = 0;
                        break;
                }

                switch (fcfg1_eesize) {
                case 0x00:
                case 0x01:
                case 0x02:
                case 0x03:
                case 0x04:
                case 0x05:
                case 0x06:
                case 0x07:
                case 0x08:
                case 0x09:
                        ee_size = (16 << (10 - fcfg1_eesize));
                        break;
                default:
                        ee_size = 0;
                        break;
                }
        }

        switch (fcfg1_pfsize) {
        case 0x03:
        case 0x05:
        case 0x07:
        case 0x09:
        case 0x0b:
        case 0x0d:
                pf_size = 1 << (14 + (fcfg1_pfsize >> 1));
                break;
        case 0x0f:
                if (granularity == 3)
                        pf_size = 1024<<10;
                else if (fcfg2_pflsh)
                        pf_size = 512<<10;
                else
                        pf_size = 256<<10;
                break;
        default:
                pf_size = 0;
                break;
        }

        LOG_DEBUG("FlexNVM: %d PFlash: %d FlexRAM: %d PFLSH: %d",
                  nvm_size, pf_size, ee_size, fcfg2_pflsh);

        num_blocks = kinetis_flash_params[granularity].num_blocks;
        num_pflash_blocks = num_blocks / (2 - fcfg2_pflsh);
        first_nvm_bank = num_pflash_blocks;
        num_nvm_blocks = num_blocks - num_pflash_blocks;

        LOG_DEBUG("%d blocks total: %d PFlash, %d FlexNVM",
                  num_blocks, num_pflash_blocks, num_nvm_blocks);

        /*
         * If the flash class is already assigned, verify the
         * parameters.
         */
        if (kinfo->flash_class != FC_AUTO) {
                if (kinfo->bank_ordinal != (unsigned) bank->bank_number) {
                        LOG_WARNING("Flash ordinal/bank number mismatch");
                        reassign = 1;
                } else if (kinfo->granularity != granularity) {
                        LOG_WARNING("Flash granularity mismatch");
                        reassign = 1;
                } else {
                        switch (kinfo->flash_class) {
                        case FC_PFLASH:
                                if (kinfo->bank_ordinal >= first_nvm_bank) {
                                        LOG_WARNING("Class mismatch, bank %d is not PFlash",
                                                    bank->bank_number);
                                        reassign = 1;
                                } else if (bank->size != (pf_size / num_pflash_blocks)) {
                                        LOG_WARNING("PFlash size mismatch");
                                        reassign = 1;
                                } else if (bank->base !=
                                         (0x00000000 + bank->size * kinfo->bank_ordinal)) {
                                        LOG_WARNING("PFlash address range mismatch");
                                        reassign = 1;
                                } else if (kinfo->sector_size !=
                                         kinetis_flash_params[granularity].pflash_sector_size_bytes) {
                                        LOG_WARNING("PFlash sector size mismatch");
                                        reassign = 1;
                                } else {
                                        LOG_DEBUG("PFlash bank %d already configured okay",
                                                  kinfo->bank_ordinal);
                                }
                                break;
                        case FC_FLEX_NVM:
                                if ((kinfo->bank_ordinal >= num_blocks) ||
                                    (kinfo->bank_ordinal < first_nvm_bank)) {
                                        LOG_WARNING("Class mismatch, bank %d is not FlexNVM",
                                                    bank->bank_number);
                                        reassign = 1;
                                } else if (bank->size != (nvm_size / num_nvm_blocks)) {
                                        LOG_WARNING("FlexNVM size mismatch");
                                        reassign = 1;
                                } else if (bank->base !=
                                         (0x10000000 + bank->size * kinfo->bank_ordinal)) {
                                        LOG_WARNING("FlexNVM address range mismatch");
                                        reassign = 1;
                                } else if (kinfo->sector_size !=
                                         kinetis_flash_params[granularity].nvm_sector_size_bytes) {
                                        LOG_WARNING("FlexNVM sector size mismatch");
                                        reassign = 1;
                                } else {
                                        LOG_DEBUG("FlexNVM bank %d already configured okay",
                                                  kinfo->bank_ordinal);
                                }
                                break;
                        case FC_FLEX_RAM:
                                if (kinfo->bank_ordinal != num_blocks) {
                                        LOG_WARNING("Class mismatch, bank %d is not FlexRAM",
                                                    bank->bank_number);
                                        reassign = 1;
                                } else if (bank->size != ee_size) {
                                        LOG_WARNING("FlexRAM size mismatch");
                                        reassign = 1;
                                } else if (bank->base != 0x14000000) {
                                        LOG_WARNING("FlexRAM address mismatch");
                                        reassign = 1;
                                } else if (kinfo->sector_size !=
                                         kinetis_flash_params[granularity].nvm_sector_size_bytes) {
                                        LOG_WARNING("FlexRAM sector size mismatch");
                                        reassign = 1;
                                } else {
                                        LOG_DEBUG("FlexRAM bank %d already configured okay",
                                                  kinfo->bank_ordinal);
                                }
                                break;

                        default:
                                LOG_WARNING("Unknown or inconsistent flash class");
                                reassign = 1;
                                break;
                        }
                }
        } else {
                LOG_INFO("Probing flash info for bank %d", bank->bank_number);
                reassign = 1;
        }

        if (!reassign)
                return ERROR_OK;

        kinfo->granularity = granularity;

        if ((unsigned)bank->bank_number < num_pflash_blocks) {
                /* pflash, banks start at address zero */
                kinfo->flash_class = FC_PFLASH;
                bank->size = (pf_size / num_pflash_blocks);
                bank->base = 0x00000000 + bank->size * bank->bank_number;
                kinfo->sector_size = kinetis_flash_params[granularity].pflash_sector_size_bytes;
                kinfo->protection_size = pf_size / 32;
        } else if ((unsigned)bank->bank_number < num_blocks) {
                /* nvm, banks start at address 0x10000000 */
                kinfo->flash_class = FC_FLEX_NVM;
                bank->size = (nvm_size / num_nvm_blocks);
                bank->base = 0x10000000 + bank->size * (bank->bank_number - first_nvm_bank);
                kinfo->sector_size = kinetis_flash_params[granularity].nvm_sector_size_bytes;
                kinfo->protection_size = 0; /* FIXME: TODO: depends on DEPART bits, chip */
        } else if ((unsigned)bank->bank_number == num_blocks) {
                LOG_ERROR("FlexRAM support not yet implemented");
                return ERROR_FLASH_OPER_UNSUPPORTED;
        } else {
                LOG_ERROR("Cannot determine parameters for bank %d, only %d banks on device",
                          bank->bank_number, num_blocks);
                return ERROR_FLASH_BANK_INVALID;
        }

        if (bank->sectors) {
                free(bank->sectors);
                bank->sectors = NULL;
        }

        bank->num_sectors = bank->size / kinfo->sector_size;
        assert(bank->num_sectors > 0);
        bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);

        for (i = 0; i < bank->num_sectors; i++) {
                bank->sectors[i].offset = offset;
                bank->sectors[i].size = kinfo->sector_size;
                offset += kinfo->sector_size;
                bank->sectors[i].is_erased = -1;
                bank->sectors[i].is_protected = 1;
        }

        return ERROR_OK;
}

static int kinetis_probe(struct flash_bank *bank)
{
        if (bank->target->state != TARGET_HALTED) {
                LOG_WARNING("Cannot communicate... target not halted.");
                return ERROR_TARGET_NOT_HALTED;
        }

        return kinetis_read_part_info(bank);
}

static int kinetis_auto_probe(struct flash_bank *bank)
{
        struct kinetis_flash_bank *kinfo = bank->driver_priv;

        if (kinfo->sim_sdid)
                return ERROR_OK;

        return kinetis_probe(bank);
}

static int kinetis_info(struct flash_bank *bank, char *buf, int buf_size)
{
        const char *bank_class_names[] = {
                "(ANY)", "PFlash", "FlexNVM", "FlexRAM"
        };

        struct kinetis_flash_bank *kinfo = bank->driver_priv;

        (void) snprintf(buf, buf_size,
                        "%s driver for %s flash bank %s at 0x%8.8" PRIx32 "",
                        bank->driver->name, bank_class_names[kinfo->flash_class],
                        bank->name, bank->base);

        return ERROR_OK;
}

static int kinetis_blank_check(struct flash_bank *bank)
{
        struct kinetis_flash_bank *kinfo = bank->driver_priv;

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

        if (kinfo->flash_class == FC_PFLASH) {
                int result;
                uint32_t w0 = 0, w1 = 0, w2 = 0;
                uint8_t ftfx_fstat;

                /* check if whole bank is blank */
                w0 = (0x00 << 24) | bank->base;
                w1 = 0; /* "normal margin" */

                result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                if (result != ERROR_OK)
                        return result;

                if (ftfx_fstat & 0x01) {
                        /* the whole bank is not erased, check sector-by-sector */
                        int i;
                        for (i = 0; i < bank->num_sectors; i++) {
                                w0 = (0x01 << 24) | (bank->base + bank->sectors[i].offset);
                                w1 = (0x100 << 16) | 0; /* normal margin */

                                result = kinetis_ftfx_command(bank, w0, w1, w2, &ftfx_fstat);

                                if (result == ERROR_OK) {
                                        bank->sectors[i].is_erased = !(ftfx_fstat & 0x01);
                                } else {
                                        LOG_DEBUG("Ignoring errored PFlash sector blank-check");
                                        bank->sectors[i].is_erased = -1;
                                }
                        }
                } else {
                        /* the whole bank is erased, update all sectors */
                        int i;
                        for (i = 0; i < bank->num_sectors; i++)
                                bank->sectors[i].is_erased = 1;
                }
        } else {
                LOG_WARNING("kinetis_blank_check not supported yet for FlexNVM");
                return ERROR_FLASH_OPERATION_FAILED;
        }

        return ERROR_OK;
}

static int kinetis_flash_read(struct flash_bank *bank,
                              uint8_t *buffer, uint32_t offset, uint32_t count)
{
        LOG_WARNING("kinetis_flash_read not supported yet");

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

        return ERROR_FLASH_OPERATION_FAILED;
}

struct flash_driver kinetis_flash = {
        .name = "kinetis",
        .flash_bank_command = kinetis_flash_bank_command,
        .erase = kinetis_erase,
        .protect = kinetis_protect,
        .write = kinetis_write,
        .read = kinetis_flash_read,
        .probe = kinetis_probe,
        .auto_probe = kinetis_auto_probe,
        .erase_check = kinetis_blank_check,
        .protect_check = kinetis_protect_check,
        .info = kinetis_info,
};