bluenrg-x.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2017 by Michele Sardo                                   *
 *   msmttchr@gmail.com                                                    *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include <helper/binarybuffer.h>
#include "helper/types.h"
#include <target/algorithm.h>
#include <target/armv7m.h>
#include <target/cortex_m.h>
#include "imp.h"
#include "bluenrg-x.h"
 
#define BLUENRG2_JTAG_REG    (flash_priv_data_2.jtag_idcode_reg)
#define BLUENRGLP_JTAG_REG   (flash_priv_data_lp.jtag_idcode_reg)
 
#define DIE_ID_REG(bluenrgx_info)           (bluenrgx_info->flash_ptr->die_id_reg)
#define JTAG_IDCODE_REG(bluenrgx_info)      (bluenrgx_info->flash_ptr->jtag_idcode_reg)
#define FLASH_PAGE_SIZE(bluenrgx_info)      (bluenrgx_info->flash_ptr->flash_page_size)
 
#define FLASH_SIZE_REG_MASK (0xFFFF)
 
struct flash_ctrl_priv_data {
    uint32_t die_id_reg;
    uint32_t jtag_idcode_reg;
    uint32_t flash_base;
    uint32_t flash_regs_base;
    uint32_t flash_page_size;
    uint32_t jtag_idcode;
    char *part_name;
};
 
static const struct flash_ctrl_priv_data flash_priv_data_1 = {
    .die_id_reg = 0x4090001C,
    .jtag_idcode_reg = 0x40900028,
    .flash_base = 0x10040000,
    .flash_regs_base = 0x40100000,
    .flash_page_size = 2048,
    .jtag_idcode = 0x00000000,
    .part_name = "BLUENRG-1",
};
 
static const struct flash_ctrl_priv_data flash_priv_data_2 = {
    .die_id_reg = 0x4090001C,
    .jtag_idcode_reg = 0x40900028,
    .flash_base = 0x10040000,
    .flash_regs_base = 0x40100000,
    .flash_page_size = 2048,
    .jtag_idcode = 0x0200A041,
    .part_name = "BLUENRG-2",
};
 
static const struct flash_ctrl_priv_data flash_priv_data_lp = {
    .die_id_reg = 0x40000000,
    .jtag_idcode_reg = 0x40000004,
    .flash_base = 0x10040000,
    .flash_regs_base = 0x40001000,
    .flash_page_size = 2048,
    .jtag_idcode = 0x0201E041,
    .part_name = "BLUENRG-LP",
};
 
static const struct flash_ctrl_priv_data flash_priv_data_lps = {
    .die_id_reg = 0x40000000,
    .jtag_idcode_reg = 0x40000004,
    .flash_base = 0x10040000,
    .flash_regs_base = 0x40001000,
    .flash_page_size = 2048,
    .jtag_idcode = 0x02028041,
    .part_name = "BLUENRG-LPS",
};
 
struct bluenrgx_flash_bank {
    bool probed;
    uint32_t die_id;
    const struct flash_ctrl_priv_data *flash_ptr;
};
 
static const struct flash_ctrl_priv_data *flash_ctrl[] = {
    &flash_priv_data_1,
    &flash_priv_data_2,
    &flash_priv_data_lp,
    &flash_priv_data_lps};
 
/* flash_bank bluenrg-x 0 0 0 0 <target#> */
FLASH_BANK_COMMAND_HANDLER(bluenrgx_flash_bank_command)
{
    struct bluenrgx_flash_bank *bluenrgx_info;
    /* Create the bank structure */
    bluenrgx_info = calloc(1, sizeof(*bluenrgx_info));
 
    /* Check allocation */
    if (!bluenrgx_info) {
        LOG_ERROR("failed to allocate bank structure");
        return ERROR_FAIL;
    }
 
    bank->write_start_alignment = 16;
    bank->write_end_alignment = 16;
 
    bank->driver_priv = bluenrgx_info;
 
    bluenrgx_info->probed = false;
 
    if (CMD_ARGC < 6)
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    return ERROR_OK;
}
 
static inline uint32_t bluenrgx_get_flash_reg(struct flash_bank *bank, uint32_t reg_offset)
{
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
    return bluenrgx_info->flash_ptr->flash_regs_base + reg_offset;
}
 
static inline int bluenrgx_read_flash_reg(struct flash_bank *bank, uint32_t reg_offset, uint32_t *value)
{
    return target_read_u32(bank->target, bluenrgx_get_flash_reg(bank, reg_offset), value);
}
 
static inline int bluenrgx_write_flash_reg(struct flash_bank *bank, uint32_t reg_offset, uint32_t value)
{
    return target_write_u32(bank->target, bluenrgx_get_flash_reg(bank, reg_offset), value);
}
 
static int bluenrgx_erase(struct flash_bank *bank, unsigned int first,
        unsigned int last)
{
    int retval = ERROR_OK;
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
    unsigned int num_sectors = (last - first + 1);
    const bool mass_erase = (num_sectors == bank->num_sectors);
    struct target *target = bank->target;
    uint32_t address, command;
 
    /* check preconditions */
    if (!bluenrgx_info->probed)
        return ERROR_FLASH_BANK_NOT_PROBED;
 
    if (bank->target->state != TARGET_HALTED) {
        LOG_ERROR("Target not halted");
        return ERROR_TARGET_NOT_HALTED;
    }
    /* Disable blue module */
    if (target_write_u32(target, 0x200000c0, 0) != ERROR_OK) {
        LOG_ERROR("Blue disable failed");
        return ERROR_FAIL;
    }
 
    if (mass_erase) {
        command = FLASH_CMD_MASSERASE;
        address = bank->base;
        if (bluenrgx_write_flash_reg(bank, FLASH_REG_IRQRAW, 0x3f) != ERROR_OK) {
            LOG_ERROR("Register write failed");
            return ERROR_FAIL;
        }
 
        if (bluenrgx_write_flash_reg(bank, FLASH_REG_ADDRESS,
                                (address - bank->base) >> 2) != ERROR_OK) {
            LOG_ERROR("Register write failed");
            return ERROR_FAIL;
        }
 
        if (bluenrgx_write_flash_reg(bank, FLASH_REG_COMMAND, command) != ERROR_OK) {
            LOG_ERROR("Register write failed");
            return ERROR_FAIL;
        }
 
        for (unsigned int i = 0; i < 100; i++) {
            uint32_t value;
            if (bluenrgx_read_flash_reg(bank, FLASH_REG_IRQRAW, &value)) {
                LOG_ERROR("Register write failed");
                return ERROR_FAIL;
            }
            if (value & FLASH_INT_CMDDONE)
                break;
            if (i == 99) {
                LOG_ERROR("Mass erase command failed (timeout)");
                retval = ERROR_FAIL;
            }
        }
 
    } else {
        command = FLASH_CMD_ERASE_PAGE;
        for (unsigned int i = first; i <= last; i++) {
            address = bank->base+i*FLASH_PAGE_SIZE(bluenrgx_info);
            LOG_DEBUG("address = %08" PRIx32 ", index = %u", address, i);
 
            if (bluenrgx_write_flash_reg(bank, FLASH_REG_IRQRAW, 0x3f) != ERROR_OK) {
                LOG_ERROR("Register write failed");
                return ERROR_FAIL;
            }
 
            if (bluenrgx_write_flash_reg(bank, FLASH_REG_ADDRESS,
                                    (address - bank->base) >> 2) != ERROR_OK) {
                LOG_ERROR("Register write failed");
                return ERROR_FAIL;
            }
 
            if (bluenrgx_write_flash_reg(bank, FLASH_REG_COMMAND, command) != ERROR_OK) {
                LOG_ERROR("Failed");
                return ERROR_FAIL;
            }
 
            for (unsigned int j = 0; j < 100; j++) {
                uint32_t value;
                if (bluenrgx_read_flash_reg(bank, FLASH_REG_IRQRAW, &value)) {
                    LOG_ERROR("Register write failed");
                    return ERROR_FAIL;
                }
                if (value & FLASH_INT_CMDDONE)
                    break;
                if (j == 99) {
                    LOG_ERROR("Erase command failed (timeout)");
                    retval = ERROR_FAIL;
                }
            }
        }
    }
 
    return retval;
 
}
 
static int bluenrgx_write(struct flash_bank *bank, const uint8_t *buffer,
              uint32_t offset, uint32_t count)
{
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
    struct target *target = bank->target;
    uint32_t buffer_size = 16384 + 8;
    struct working_area *write_algorithm;
    struct working_area *write_algorithm_stack;
    struct working_area *source;
    uint32_t address = bank->base + offset;
    struct reg_param reg_params[5];
    struct mem_param mem_params[1];
    struct armv7m_algorithm armv7m_info;
    int retval = ERROR_OK;
 
    /* See contrib/loaders/flash/bluenrg-x/bluenrg-x_write.c for source and
     * hints how to generate the data!
     */
    static const uint8_t bluenrgx_flash_write_code[] = {
#include "../../../contrib/loaders/flash/bluenrg-x/bluenrg-x_write.inc"
    };
 
    /* check preconditions */
    if (!bluenrgx_info->probed)
        return ERROR_FLASH_BANK_NOT_PROBED;
 
    if ((offset + count) > bank->size) {
        LOG_ERROR("Requested write past beyond of flash size: (offset+count) = %" PRIu32 ", size=%" PRIu32,
              (offset + count),
              bank->size);
        return ERROR_FLASH_DST_OUT_OF_BANK;
    }
 
    if (bank->target->state != TARGET_HALTED) {
        LOG_ERROR("Target not halted");
        return ERROR_TARGET_NOT_HALTED;
    }
 
    if (target_alloc_working_area(target, sizeof(bluenrgx_flash_write_code),
                      &write_algorithm) != ERROR_OK) {
        LOG_WARNING("no working area available, can't do block memory writes");
        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
    }
 
    retval = target_write_buffer(target, write_algorithm->address,
                     sizeof(bluenrgx_flash_write_code),
                     bluenrgx_flash_write_code);
    if (retval != ERROR_OK)
        return retval;
 
    /* memory buffer */
    if (target_alloc_working_area(target, buffer_size, &source)) {
        LOG_WARNING("no large enough working area available");
        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
    }
 
    /* Stack area */
    if (target_alloc_working_area(target, 128,
                      &write_algorithm_stack) != ERROR_OK) {
        LOG_DEBUG("no working area for target algorithm stack");
        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
    }
 
    armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
    armv7m_info.core_mode = ARM_MODE_THREAD;
 
    init_reg_param(&reg_params[0], "r0", 32, PARAM_IN_OUT);
    init_reg_param(&reg_params[1], "r1", 32, PARAM_OUT);
    init_reg_param(&reg_params[2], "r2", 32, PARAM_OUT);
    init_reg_param(&reg_params[3], "r3", 32, PARAM_OUT);
    init_reg_param(&reg_params[4], "sp", 32, PARAM_OUT);
    /* Put the 4th parameter at the location in the stack frame of target write() function.
     * See contrib/loaders/flash/bluenrg-x/bluenrg-x_write.lst
     * 34 ldr     r6, [sp, #80]
     *                     ^^^ offset
     */
    init_mem_param(&mem_params[0], write_algorithm_stack->address + 80, 32, PARAM_OUT);
    /* Stack for target write algorithm - target write() function has
     * __attribute__((naked)) so it does not setup the new stack frame.
     * Therefore the stack frame uses the area from SP upwards!
     * Interrupts are disabled and no subroutines are called from write()
     * so no need to allocate stack below SP.
     * TODO: remove __attribute__((naked)) and use similar parameter passing as stm32l4x */
    buf_set_u32(reg_params[4].value, 0, 32, write_algorithm_stack->address);
 
    /* FIFO start address (first two words used for write and read pointers) */
    buf_set_u32(reg_params[0].value, 0, 32, source->address);
    /* FIFO end address (first two words used for write and read pointers) */
    buf_set_u32(reg_params[1].value, 0, 32, source->address + source->size);
    /* Flash memory address */
    buf_set_u32(reg_params[2].value, 0, 32, address);
    /* Number of bytes */
    buf_set_u32(reg_params[3].value, 0, 32, count);
    /* Flash register base address */
    buf_set_u32(mem_params[0].value, 0, 32, bluenrgx_info->flash_ptr->flash_regs_base);
 
    LOG_DEBUG("source->address = " TARGET_ADDR_FMT, source->address);
    LOG_DEBUG("source->address+ source->size = " TARGET_ADDR_FMT, source->address+source->size);
    LOG_DEBUG("write_algorithm_stack->address = " TARGET_ADDR_FMT, write_algorithm_stack->address);
    LOG_DEBUG("address = %08" PRIx32, address);
    LOG_DEBUG("count = %08" PRIx32, count);
 
    retval = target_run_flash_async_algorithm(target,
                          buffer,
                          count/16,
                          16, /* Block size: we write in block of 16 bytes to enjoy burstwrite speed */
                          1,
                          mem_params,
                          5,
                          reg_params,
                          source->address,
                          source->size,
                          write_algorithm->address,
                          0,
                          &armv7m_info);
 
    if (retval == ERROR_FLASH_OPERATION_FAILED) {
        LOG_ERROR("error executing bluenrg-x flash write algorithm");
 
        uint32_t error = buf_get_u32(reg_params[0].value, 0, 32);
 
        if (error != 0)
            LOG_ERROR("flash write failed = %08" PRIx32, error);
    }
    if (retval == ERROR_OK) {
        uint32_t rp;
        /* Read back rp and check that is valid */
        retval = target_read_u32(target, source->address+4, &rp);
        if (retval == ERROR_OK) {
            if ((rp < source->address+8) || (rp > (source->address + source->size))) {
                LOG_ERROR("flash write failed = %08" PRIx32, rp);
                retval = ERROR_FLASH_OPERATION_FAILED;
            }
        }
    }
    target_free_working_area(target, source);
    target_free_working_area(target, write_algorithm);
    target_free_working_area(target, write_algorithm_stack);
 
    destroy_reg_param(&reg_params[0]);
    destroy_reg_param(&reg_params[1]);
    destroy_reg_param(&reg_params[2]);
    destroy_reg_param(&reg_params[3]);
    destroy_reg_param(&reg_params[4]);
    destroy_mem_param(&mem_params[0]);
 
    return retval;
}
 
static int bluenrgx_probe(struct flash_bank *bank)
{
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
    uint32_t idcode, size_info, die_id;
    int retval = target_read_u32(bank->target, BLUENRGLP_JTAG_REG, &idcode);
 
    if (retval != ERROR_OK)
        return retval;
 
    if ((idcode != flash_priv_data_lp.jtag_idcode) && (idcode != flash_priv_data_lps.jtag_idcode)) {
        retval = target_read_u32(bank->target, BLUENRG2_JTAG_REG, &idcode);
        if (retval != ERROR_OK)
            return retval;
    }
 
    /* Default device is BlueNRG-1 */
    bluenrgx_info->flash_ptr = &flash_priv_data_1;
    bank->base = flash_priv_data_1.flash_base;
 
    for (size_t i = 0; i < ARRAY_SIZE(flash_ctrl); i++) {
        if (idcode == (*flash_ctrl[i]).jtag_idcode) {
            bluenrgx_info->flash_ptr = flash_ctrl[i];
            bank->base = (*flash_ctrl[i]).flash_base;
            break;
        }
    }
    retval = bluenrgx_read_flash_reg(bank, FLASH_SIZE_REG, &size_info);
    size_info = size_info & FLASH_SIZE_REG_MASK;
    if (retval != ERROR_OK)
        return retval;
 
    retval = target_read_u32(bank->target, DIE_ID_REG(bluenrgx_info), &die_id);
    if (retval != ERROR_OK)
        return retval;
 
    bank->size = (size_info + 1) * FLASH_WORD_LEN;
    bank->num_sectors = bank->size/FLASH_PAGE_SIZE(bluenrgx_info);
    bank->sectors = realloc(bank->sectors, sizeof(struct flash_sector) * bank->num_sectors);
 
    for (unsigned int i = 0; i < bank->num_sectors; i++) {
        bank->sectors[i].offset = i * FLASH_PAGE_SIZE(bluenrgx_info);
        bank->sectors[i].size = FLASH_PAGE_SIZE(bluenrgx_info);
        bank->sectors[i].is_erased = -1;
        bank->sectors[i].is_protected = 0;
    }
 
    bluenrgx_info->probed = true;
    bluenrgx_info->die_id = die_id;
 
    return ERROR_OK;
}
 
static int bluenrgx_auto_probe(struct flash_bank *bank)
{
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
 
    if (bluenrgx_info->probed)
        return ERROR_OK;
 
    return bluenrgx_probe(bank);
}
 
/* This method must return a string displaying information about the bank */
static int bluenrgx_get_info(struct flash_bank *bank, struct command_invocation *cmd)
{
    struct bluenrgx_flash_bank *bluenrgx_info = bank->driver_priv;
    int mask_number, cut_number;
 
    if (!bluenrgx_info->probed) {
        int retval = bluenrgx_probe(bank);
        if (retval != ERROR_OK) {
            command_print_sameline(cmd, "Unable to find bank information.");
            return retval;
        }
    }
 
    mask_number = (bluenrgx_info->die_id >> 4) & 0xF;
    cut_number = bluenrgx_info->die_id & 0xF;
 
    command_print_sameline(cmd, "%s - Rev: %d.%d",
            bluenrgx_info->flash_ptr->part_name, mask_number, cut_number);
    return ERROR_OK;
}
 
const struct flash_driver bluenrgx_flash = {
    .name = "bluenrg-x",
    .flash_bank_command = bluenrgx_flash_bank_command,
    .erase = bluenrgx_erase,
    .protect = NULL,
    .write = bluenrgx_write,
    .read = default_flash_read,
    .probe = bluenrgx_probe,
    .erase_check = default_flash_blank_check,
    .protect_check = NULL,
    .auto_probe = bluenrgx_auto_probe,
    .info = bluenrgx_get_info,
};