psoc4: support for Cypress PSoC 41xx/42xx family

[openocd.git] / src / flash / nor / psoc4.c

/***************************************************************************
 *   Copyright (C) 2005 by Dominic Rath                                    *
 *   Dominic.Rath@gmx.de                                                   *
 *                                                                         *
 *   Copyright (C) 2008 by Spencer Oliver                                  *
 *   spen@spen-soft.co.uk                                                  *
 *                                                                         *
 *   Copyright (C) 2011 by Andreas Fritiofson                              *
 *   andreas.fritiofson@gmail.com                                          *
 *                                                                         *
 *   Copyright (C) 2014 by Tomas Vanek (PSoC 4 support derived from STM32) *
 *   vanekt@fbl.cz                                                         *
 *                                                                         *
 *   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.                          *
 ***************************************************************************/

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

#include "imp.h"
#include <helper/binarybuffer.h>
#include <jtag/jtag.h>
#include <target/algorithm.h>
#include <target/armv7m.h>

/* device documets:

 PSoC(R) 4: PSoC 4200 Family Datasheet
        Document Number: 001-87197 Rev. *B  Revised August 29, 2013

 PSoC 4100/4200 Family PSoC(R) 4 Architecture TRM
        Document No. 001-85634 Rev. *C March 25, 2014

 PSoC(R) 4 Registers TRM Spec.
        Document No. 001-85847 Rev. *A June 25, 2013

 CY8C41xx, CY8C42xx Programming Specifications
        Document No. 001-81799 Rev. *C March 4, 2014
*/

/* register locations */
#define PSOC4_CPUSS_SYSREQ      0x40000004
#define PSOC4_CPUSS_SYSARG      0x40000008
#define PSOC4_TEST_MODE         0x40030014
#define PSOC4_SPCIF_GEOMETRY    0x400E0000

#define PSOC4_SFLASH_MACRO      0x0ffff000

/* constants */
#define PSOC4_SROM_KEY1                 0xb6
#define PSOC4_SROM_KEY2                 0xd3
#define PSOC4_SROM_SYSREQ_BIT           (1<<31)
#define PSOC4_SROM_HMASTER_BIT          (1<<30)
#define PSOC4_SROM_PRIVILEGED_BIT       (1<<28)
#define PSOC4_SROM_STATUS_SUCCEEDED     0xa0000000
#define PSOC4_SROM_STATUS_FAILED        0xf0000000

#define PSOC4_CMD_GET_SILICON_ID        0
#define PSOC4_CMD_LOAD_LATCH            4
#define PSOC4_CMD_WRITE_ROW             5
#define PSOC4_CMD_PROGRAM_ROW           6
#define PSOC4_CMD_ERASE_ALL             0xa
#define PSOC4_CMD_CHECKSUM              0xb
#define PSOC4_CMD_WRITE_PROTECTION      0xd

#define PSOC4_CHIP_PROT_VIRGIN          0x0
#define PSOC4_CHIP_PROT_OPEN            0x1
#define PSOC4_CHIP_PROT_PROTECTED       0x2
#define PSOC4_CHIP_PROT_KILL            0x4


struct psoc4_chip_details {
        uint16_t id;
        const char *type;
        const char *package;
        uint16_t flash_size_in_kb;
};

/* list of PSoC 4 chips
 * flash_size_in_kb is not necessary as it can be decoded from SPCIF_GEOMETRY
 */
const struct psoc4_chip_details psoc4_devices[] = {
        /* 4200 series */
        { 0x04A6, "CY8C4245PVI-482", "SSOP-28", .flash_size_in_kb = 32 },
        { 0x04B6, "CY8C4245LQI-483", "QFN-40",  .flash_size_in_kb = 32 },
        { 0x04C8, "CY8C4245AXI-483", "TQFP-44", .flash_size_in_kb = 32 },
        { 0x04FB, "CY8C4245AXI-473", "TQFP-44", .flash_size_in_kb = 32 },
        { 0x04F0, "CY8C4244PVI-432", "SSOP-28", .flash_size_in_kb = 16 },
        { 0x04F1, "CY8C4244PVI-442", "SSOP-28", .flash_size_in_kb = 16 },
        { 0x04F6, "CY8C4244LQI-443", "QFN-40",  .flash_size_in_kb = 16 },
        { 0x04FA, "CY8C4244AXI-443", "TQFP-44", .flash_size_in_kb = 16 },

        /* 4100 series */
        { 0x0410, "CY8C4124PVI-432", "SSOP-28", .flash_size_in_kb = 16 },
        { 0x0411, "CY8C4124PVI-442", "SSOP-28", .flash_size_in_kb = 16 },
        { 0x0416, "CY8C4124LQI-443", "QFN-40",  .flash_size_in_kb = 16 },
        { 0x041A, "CY8C4124AXI-443", "TQFP-44", .flash_size_in_kb = 16 },
        { 0x041B, "CY8C4125AXI-473", "TQFP-44", .flash_size_in_kb = 32 },
        { 0x0412, "CY8C4125PVI-482", "SSOP-28", .flash_size_in_kb = 32 },
        { 0x0417, "CY8C4125LQI-483", "QFN-40",  .flash_size_in_kb = 32 },
        { 0x041C, "CY8C4125AXI-483", "TQFP-44", .flash_size_in_kb = 32 },
};


struct psoc4_flash_bank {
        uint16_t row_size;
        uint32_t user_bank_size;
        int probed;
        uint32_t silicon_id;
        uint8_t chip_protection;
        uint16_t cmd_program_row;
};


static const struct psoc4_chip_details *psoc4_details_by_id(uint32_t silicon_id)
{
        const struct psoc4_chip_details *p = psoc4_devices;
        unsigned int i;
        uint16_t id = silicon_id >> 16; /* ignore die revision */
        for (i = 0; i < sizeof(psoc4_devices)/sizeof(psoc4_devices[0]); i++, p++) {
                if (p->id == id)
                        return p;
        }
        LOG_DEBUG("Unknown PSoC 4 device silicon id 0x%08" PRIx32 ".", silicon_id);
        return NULL;
}

static const char *psoc4_decode_chip_protection(uint8_t protection)
{
        switch (protection) {
        case PSOC4_CHIP_PROT_VIRGIN:
                return "protection VIRGIN";
        case PSOC4_CHIP_PROT_OPEN:
                return "protection open";
        case PSOC4_CHIP_PROT_PROTECTED:
                return "PROTECTED";
        case PSOC4_CHIP_PROT_KILL:
                return "protection KILL";
        default:
                LOG_WARNING("Unknown protection state 0x%02" PRIx8 "", protection);
                return "";
        }
}


/* flash bank <name> psoc <base> <size> 0 0 <target#>
 */
FLASH_BANK_COMMAND_HANDLER(psoc4_flash_bank_command)
{
        struct psoc4_flash_bank *psoc4_info;

        if (CMD_ARGC < 6)
                return ERROR_COMMAND_SYNTAX_ERROR;

        psoc4_info = calloc(1, sizeof(struct psoc4_flash_bank));

        bank->driver_priv = psoc4_info;
        psoc4_info->user_bank_size = bank->size;

        return ERROR_OK;
}


/* PSoC 4 system ROM request
 *  Setting SROM_SYSREQ_BIT in CPUSS_SYSREQ register runs NMI service
 *  in sysrem ROM. Algorithm just waits for NMI to finish.
 *  When sysreq_params_size == 0 only one parameter is passed in CPUSS_SYSARG register.
 *  Otherwise address of memory parameter block is set in CPUSS_SYSARG
 *  and the first parameter is written to the first word of parameter block
 */
static int psoc4_sysreq(struct target *target, uint8_t cmd, uint16_t cmd_param,
                uint32_t *sysreq_params, uint32_t sysreq_params_size)
{
        struct working_area *sysreq_wait_algorithm;
        struct working_area *sysreq_mem;

        struct reg_param reg_params[1];
        struct armv7m_algorithm armv7m_info;

        int retval = ERROR_OK;

        uint32_t param1 = PSOC4_SROM_KEY1
                         | ((PSOC4_SROM_KEY2 + cmd) << 8)
                         | (cmd_param << 16);

        static uint8_t psoc4_sysreq_wait_code[] = {
                /* system request NMI is served immediately after algo run
       now we are done: break */
                0x00, 0xbe,             /* bkpt 0 */
        };

        const int code_words = (sizeof(psoc4_sysreq_wait_code) + 3) / 4;
                                        /* stack must be aligned */
        const int stack_size = 196;
        /* tested stack sizes on PSoC 4:
                ERASE_ALL       144
                PROGRAM_ROW     112
                other sysreq     68
        */

        /* allocate area for sysreq wait code and stack */
        if (target_alloc_working_area(target, code_words * 4 + stack_size,
                        &sysreq_wait_algorithm) != ERROR_OK) {
                LOG_DEBUG("no working area for sysreq code");
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
        };

        /* Write the code */
        retval = target_write_buffer(target,
                        sysreq_wait_algorithm->address,
                        sizeof(psoc4_sysreq_wait_code),
                        psoc4_sysreq_wait_code);
        if (retval != ERROR_OK) {
                /* we already allocated the writing code, but failed to get a
                 * buffer, free the algorithm */
                goto cleanup_algo;
        }

        if (sysreq_params_size) {
                /* Allocate memory for sysreq_params */
                retval = target_alloc_working_area(target, sysreq_params_size, &sysreq_mem);
                if (retval != ERROR_OK) {
                        LOG_WARNING("no working area for sysreq parameters");

                        /* we already allocated the writing code, but failed to get a
                         * buffer, free the algorithm */
                        retval = ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
                        goto cleanup_algo;
                }

                /* Write sysreq_params */
                sysreq_params[0] = param1;
                retval = target_write_buffer(target, sysreq_mem->address,
                                sysreq_params_size, (uint8_t *)sysreq_params);
                if (retval != ERROR_OK)
                        goto cleanup_mem;

                /* Set address of sysreq parameters block */
                retval = target_write_u32(target, PSOC4_CPUSS_SYSARG, sysreq_mem->address);
                if (retval != ERROR_OK)
                        goto cleanup_mem;

        } else {
                /* Sysreq without memory block of parameters */
                /* Set register parameter */
                retval = target_write_u32(target, PSOC4_CPUSS_SYSARG, param1);
                if (retval != ERROR_OK)
                        goto cleanup_mem;
        }

        armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
        armv7m_info.core_mode = ARM_MODE_THREAD;

        /* sysreq stack */
        init_reg_param(&reg_params[0], "sp", 32, PARAM_OUT);
        buf_set_u32(reg_params[0].value, 0, 32,
                    sysreq_wait_algorithm->address + sysreq_wait_algorithm->size);

        struct armv7m_common *armv7m = target_to_armv7m(target);
        if (armv7m == NULL) {

                /* something is very wrong if armv7m is NULL */
                LOG_ERROR("unable to get armv7m target");
                goto cleanup;
        }

        /* Set SROM request */
        retval = target_write_u32(target, PSOC4_CPUSS_SYSREQ,
                                  PSOC4_SROM_SYSREQ_BIT | PSOC4_SROM_HMASTER_BIT | cmd);
        if (retval != ERROR_OK)
                goto cleanup;

        /* Execute wait code */
        retval = target_run_algorithm(target, 0, NULL,
                                sizeof(reg_params) / sizeof(*reg_params), reg_params,
                                sysreq_wait_algorithm->address, 0, 1000, &armv7m_info);
        if (retval != ERROR_OK)
                LOG_ERROR("sysreq wait code execution failed");

cleanup:
        destroy_reg_param(&reg_params[0]);

cleanup_mem:
        if (sysreq_params_size)
                target_free_working_area(target, sysreq_mem);

cleanup_algo:
        target_free_working_area(target, sysreq_wait_algorithm);

        return retval;
}


/* helper routine to get silicon ID from a PSoC 4 chip */
static int psoc4_get_silicon_id(struct target *target, uint32_t *silicon_id, uint8_t *protection)
{
        uint32_t params = PSOC4_SROM_KEY1
                         | ((PSOC4_SROM_KEY2 + PSOC4_CMD_GET_SILICON_ID) << 8);
        uint32_t part0, part1;

        int retval = psoc4_sysreq(target, PSOC4_CMD_GET_SILICON_ID, 0, NULL, 0);
        if (retval != ERROR_OK)
                return retval;

        retval = target_read_u32(target, PSOC4_CPUSS_SYSARG, &part0);
        if (retval != ERROR_OK)
                return retval;

        if (part0 == params) {
                LOG_ERROR("sysreq silicon id request not served");
                return ERROR_FAIL;
        }

        retval = target_read_u32(target, PSOC4_CPUSS_SYSREQ, &part1);
        if (retval != ERROR_OK)
                return retval;

        uint32_t silicon = ((part0 & 0xffff) << 16)
                        | (((part0 >> 16) & 0xff) << 8)
                        | (part1 & 0xff);
        uint8_t prot = (part1 >> 12) & 0xff;

        if (silicon_id)
                        *silicon_id = silicon;
        if (protection)
                        *protection = prot;

        LOG_DEBUG("silicon id: 0x%" PRIx32 "", silicon);
        LOG_DEBUG("protection: 0x%" PRIx8 "", prot);
        return retval;
}


static int psoc4_protect_check(struct flash_bank *bank)
{
        struct target *target = bank->target;
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;

        uint32_t prot_addr = PSOC4_SFLASH_MACRO;
        uint32_t protection;
        int i, s;
        int num_bits;
        int retval = ERROR_OK;

        num_bits = bank->num_sectors;

        for (i = 0; i < num_bits; i += 32) {
                retval = target_read_u32(target, prot_addr, &protection);
                if (retval != ERROR_OK)
                        return retval;

                prot_addr += 4;

                for (s = 0; s < 32; s++) {
                        if (i + s >= num_bits)
                                break;
                        bank->sectors[i + s].is_protected = (protection & (1 << s)) ? 1 : 0;
                }
        }

        retval = psoc4_get_silicon_id(target, NULL, &(psoc4_info->chip_protection));
        return retval;
}


static int psoc4_mass_erase(struct flash_bank *bank)
{
        struct target *target = bank->target;
        int i;

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

        /* Call "Erase All" system ROM API */
        uint32_t param;
        int retval = psoc4_sysreq(target, PSOC4_CMD_ERASE_ALL,
                        0,
                        &param, sizeof(param));

        if (retval == ERROR_OK)
                /* set all sectors as erased */
                for (i = 0; i < bank->num_sectors; i++)
                        bank->sectors[i].is_erased = 1;

        return retval;
}


static int psoc4_erase(struct flash_bank *bank, int first, int last)
{
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        if (psoc4_info->cmd_program_row == PSOC4_CMD_WRITE_ROW) {
                LOG_INFO("Autoerase enabled, erase command ignored");
                return ERROR_OK;
        }

        if ((first == 0) && (last == (bank->num_sectors - 1)))
                return psoc4_mass_erase(bank);

        LOG_ERROR("Only mass erase available");

        return ERROR_FAIL;
}


static int psoc4_protect(struct flash_bank *bank, int set, int first, int last)
{
        struct target *target = bank->target;
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;

        if (psoc4_info->probed == 0)
                return ERROR_FAIL;

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

        uint32_t *sysrq_buffer = NULL;
        int retval;
        int num_bits = bank->num_sectors;
        const int param_sz = 8;
        int prot_sz = num_bits / 8;
        int chip_prot = PSOC4_CHIP_PROT_OPEN;
        int flash_macro = 0; /* PSoC 42xx has only macro 0 */
        int i;

        sysrq_buffer = calloc(1, param_sz + prot_sz);
        if (sysrq_buffer == NULL) {
                LOG_ERROR("no memory for row buffer");
                return ERROR_FAIL;
        }

        for (i = first; i < num_bits && i <= last; i++)
                bank->sectors[i].is_protected = set;

        uint32_t *p = sysrq_buffer + 2;
        for (i = 0; i < num_bits; i++) {
                if (bank->sectors[i].is_protected)
                        p[i / 32] |= 1 << (i % 32);
        }

        /* Call "Load Latch" system ROM API */
        sysrq_buffer[1] = prot_sz - 1;
        retval = psoc4_sysreq(target, PSOC4_CMD_LOAD_LATCH,
                        0,      /* Byte number in latch from what to write */
                        sysrq_buffer, param_sz + psoc4_info->row_size);
        if (retval != ERROR_OK)
                goto cleanup;

        /* Call "Write Protection" system ROM API */
        retval = psoc4_sysreq(target, PSOC4_CMD_WRITE_PROTECTION,
                        chip_prot | (flash_macro << 8), NULL, 0);
cleanup:
        if (retval != ERROR_OK)
                psoc4_protect_check(bank);

        if (sysrq_buffer)
                free(sysrq_buffer);

        return retval;
}


COMMAND_HANDLER(psoc4_handle_flash_autoerase_command)
{
        if (CMD_ARGC < 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        struct flash_bank *bank;
        int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
        if (ERROR_OK != retval)
                return retval;

        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        bool enable = psoc4_info->cmd_program_row == PSOC4_CMD_WRITE_ROW;

        if (CMD_ARGC >= 2)
                COMMAND_PARSE_ON_OFF(CMD_ARGV[1], enable);

        if (enable) {
                psoc4_info->cmd_program_row = PSOC4_CMD_WRITE_ROW;
                LOG_INFO("Flash auto-erase enabled, non mass erase commands will be ignored.");
        } else {
                psoc4_info->cmd_program_row = PSOC4_CMD_PROGRAM_ROW;
                LOG_INFO("Flash auto-erase disabled. Use psoc mass_erase before flash programming.");
        }

        return retval;
}


static int psoc4_write(struct flash_bank *bank, const uint8_t *buffer,
                uint32_t offset, uint32_t count)
{
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        struct target *target = bank->target;
        uint32_t *sysrq_buffer = NULL;
        int retval = ERROR_OK;
        const int param_sz = 8;

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

        if (offset & 0x1) {
                LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
                return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
        }

        sysrq_buffer = malloc(param_sz + psoc4_info->row_size);
        if (sysrq_buffer == NULL) {
                LOG_ERROR("no memory for row buffer");
                return ERROR_FAIL;
        }

        uint8_t *row_buffer = (uint8_t *)sysrq_buffer + param_sz;
        uint32_t row_num = offset / psoc4_info->row_size;
        uint32_t row_offset = offset - row_num * psoc4_info->row_size;
        if (row_offset)
                memset(row_buffer, 0, row_offset);

        bool save_poll = jtag_poll_get_enabled();
        jtag_poll_set_enabled(false);

        while (count) {
                uint32_t chunk_size = psoc4_info->row_size - row_offset;
                if (chunk_size > count) {
                        chunk_size = count;
                        memset(row_buffer + chunk_size, 0, psoc4_info->row_size - chunk_size);
                }
                memcpy(row_buffer + row_offset, buffer, chunk_size);
                LOG_DEBUG("offset / row: 0x%" PRIx32 " / %d  size %d",
                                offset, row_offset, chunk_size);

                /* Call "Load Latch" system ROM API */
                sysrq_buffer[1] = psoc4_info->row_size - 1;
                retval = psoc4_sysreq(target, PSOC4_CMD_LOAD_LATCH,
                                0,      /* Byte number in latch from what to write */
                                sysrq_buffer, param_sz + psoc4_info->row_size);
                if (retval != ERROR_OK)
                        goto cleanup;

                /* Call "Program Row" or "Write Row" system ROM API */
                uint32_t sysrq_param;
                retval = psoc4_sysreq(target, psoc4_info->cmd_program_row,
                                row_num & 0xffff,
                                &sysrq_param, sizeof(sysrq_param));
                if (retval != ERROR_OK)
                        goto cleanup;

                buffer += chunk_size;
                row_num++;
                row_offset = 0;
                count -= chunk_size;
        }

cleanup:
        jtag_poll_set_enabled(save_poll);

        if (sysrq_buffer)
                free(sysrq_buffer);

        return retval;
}


static int psoc4_probe(struct flash_bank *bank)
{
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        struct target *target = bank->target;
        int i;
        uint16_t flash_size_in_kb = 0;
        uint16_t max_flash_size_in_kb;
        uint32_t cpu_id;
        uint32_t silicon_id;
        int row_size;
        uint32_t base_address = 0x00000000;
        uint8_t protection;

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

        psoc4_info->probed = 0;
        psoc4_info->cmd_program_row = PSOC4_CMD_PROGRAM_ROW;

        /* Get the CPUID from the ARM Core
         * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0432c/DDI0432C_cortex_m0_r0p0_trm.pdf 4.2.1 */
        int retval = target_read_u32(target, 0xE000ED00, &cpu_id);
        if (retval != ERROR_OK)
                return retval;

        LOG_DEBUG("cpu id = 0x%08" PRIx32 "", cpu_id);

        /* set page size, protection granularity and max flash size depending on family */
        switch ((cpu_id >> 4) & 0xFFF) {
        case 0xc20: /* M0 -> PSoC4 */
                row_size = 128;
                max_flash_size_in_kb = 32;
                break;
        default:
                LOG_WARNING("Cannot identify target as a PSoC 4 family.");
                return ERROR_FAIL;
        }

        uint32_t spcif_geometry;
        retval = target_read_u32(target, PSOC4_SPCIF_GEOMETRY, &spcif_geometry);
        if (retval == ERROR_OK) {
                row_size = 128 * ((spcif_geometry >> 22) & 3);
                flash_size_in_kb = (spcif_geometry & 0xffff) * 256 / 1024;
                LOG_INFO("SPCIF geometry: %d kb flash, row %d bytes.", flash_size_in_kb, row_size);
        }

        /* ST-Link v2 has some problem reading PSOC4_SPCIF_GEOMETRY
                and an error is reported late. Dummy read gets this error. */
        uint32_t dummy;
        target_read_u32(target, PSOC4_CPUSS_SYSREQ, &dummy);

        /* get silicon ID from target. */
        retval = psoc4_get_silicon_id(target, &silicon_id, &protection);
        if (retval != ERROR_OK)
                return retval;

        const struct psoc4_chip_details *details = psoc4_details_by_id(silicon_id);
        if (details) {
                LOG_INFO("%s device detected.", details->type);
                if (flash_size_in_kb == 0)
                        flash_size_in_kb = details->flash_size_in_kb;
                else if (flash_size_in_kb != details->flash_size_in_kb)
                        LOG_ERROR("Flash size mismatch");
        }

        psoc4_info->row_size = row_size;
        psoc4_info->silicon_id = silicon_id;
        psoc4_info->chip_protection = protection;

        /* failed reading flash size or flash size invalid (early silicon),
         * default to max target family */
        if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
                LOG_WARNING("PSoC 4 flash size failed, probe inaccurate - assuming %dk flash",
                        max_flash_size_in_kb);
                flash_size_in_kb = max_flash_size_in_kb;
        }

        /* if the user sets the size manually then ignore the probed value
         * this allows us to work around devices that have a invalid flash size register value */
        if (psoc4_info->user_bank_size) {
                LOG_INFO("ignoring flash probed value, using configured bank size");
                flash_size_in_kb = psoc4_info->user_bank_size / 1024;
        }

        LOG_INFO("flash size = %d kbytes", flash_size_in_kb);

        /* did we assign flash size? */
        assert(flash_size_in_kb != 0xffff);

        /* calculate numbers of pages */
        int num_rows = flash_size_in_kb * 1024 / row_size;

        /* check that calculation result makes sense */
        assert(num_rows > 0);

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

        bank->base = base_address;
        bank->size = (num_rows * row_size);
        bank->num_sectors = num_rows;
        bank->sectors = malloc(sizeof(struct flash_sector) * num_rows);

        for (i = 0; i < num_rows; i++) {
                bank->sectors[i].offset = i * row_size;
                bank->sectors[i].size = row_size;
                bank->sectors[i].is_erased = -1;
                bank->sectors[i].is_protected = 1;
        }

        LOG_INFO("flash bank set %d rows", num_rows);
        psoc4_info->probed = 1;

        return ERROR_OK;
}

static int psoc4_auto_probe(struct flash_bank *bank)
{
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        if (psoc4_info->probed)
                return ERROR_OK;
        return psoc4_probe(bank);
}


static int get_psoc4_info(struct flash_bank *bank, char *buf, int buf_size)
{
        struct psoc4_flash_bank *psoc4_info = bank->driver_priv;
        int printed = 0;

        if (psoc4_info->probed == 0)
                return ERROR_FAIL;

        const struct psoc4_chip_details *details = psoc4_details_by_id(psoc4_info->silicon_id);

        if (details)
                printed = snprintf(buf, buf_size, "PSoC 4 %s rev 0x%04" PRIx16 " package %s",
                                details->type, psoc4_info->silicon_id & 0xffff, details->package);
        else
                printed = snprintf(buf, buf_size, "PSoC 4 silicon id 0x%08" PRIx32 "",
                                psoc4_info->silicon_id);

        buf += printed;
        buf_size -= printed;

        const char *prot_txt = psoc4_decode_chip_protection(psoc4_info->chip_protection);
        snprintf(buf, buf_size, " flash %d kb %s", bank->size / 1024, prot_txt);
        return ERROR_OK;
}


COMMAND_HANDLER(psoc4_handle_mass_erase_command)
{
        if (CMD_ARGC < 1)
                return ERROR_COMMAND_SYNTAX_ERROR;

        struct flash_bank *bank;
        int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
        if (ERROR_OK != retval)
                return retval;

        retval = psoc4_mass_erase(bank);
        if (retval == ERROR_OK)
                command_print(CMD_CTX, "psoc mass erase complete");
        else
                command_print(CMD_CTX, "psoc mass erase failed");

        return retval;
}


static const struct command_registration psoc4_exec_command_handlers[] = {
        {
                .name = "mass_erase",
                .handler = psoc4_handle_mass_erase_command,
                .mode = COMMAND_EXEC,
                .usage = "bank_id",
                .help = "Erase entire flash device.",
        },
        {
                .name = "flash_autoerase",
                .handler = psoc4_handle_flash_autoerase_command,
                .mode = COMMAND_EXEC,
                .usage = "bank_id on|off",
                .help = "Set autoerase mode for flash bank.",
        },
        COMMAND_REGISTRATION_DONE
};

static const struct command_registration psoc4_command_handlers[] = {
        {
                .name = "psoc4",
                .mode = COMMAND_ANY,
                .help = "PSoC 4 flash command group",
                .usage = "",
                .chain = psoc4_exec_command_handlers,
        },
        COMMAND_REGISTRATION_DONE
};

struct flash_driver psoc4_flash = {
        .name = "psoc4",
        .commands = psoc4_command_handlers,
        .flash_bank_command = psoc4_flash_bank_command,
        .erase = psoc4_erase,
        .protect = psoc4_protect,
        .write = psoc4_write,
        .read = default_flash_read,
        .probe = psoc4_probe,
        .auto_probe = psoc4_auto_probe,
        .erase_check = default_flash_blank_check,
        .protect_check = psoc4_protect_check,
        .info = get_psoc4_info,
};