#include "parallel_nand_pcan_gas.h"

static pcan_gas_status_t convert(parallel_nand_gas_result_t result)
{
    switch (result) {
    case PNAND_GAS_OK: return PCAN_GAS_OK;
    case PNAND_GAS_NO_REG: return PCAN_GAS_NO_REG;
    case PNAND_GAS_READ_ONLY: return PCAN_GAS_READ_ONLY;
    default: return PCAN_GAS_REJECTED;
    }
}

static pcan_gas_status_t read_reg(const pcan_gas_region_t *region,
                                  uint16_t offset, uint16_t *value)
{
    parallel_nand_gas_t *gas = (parallel_nand_gas_t *)region->user;
    unsigned int portable_value;
    parallel_nand_gas_result_t result = parallel_nand_gas_read(
        gas, (unsigned int)region->base + offset, &portable_value);
    if (result == PNAND_GAS_OK) *value = (uint16_t)portable_value;
    return convert(result);
}

static pcan_gas_status_t write_reg(const pcan_gas_region_t *region,
                                   uint16_t offset, uint16_t value)
{
    parallel_nand_gas_t *gas = (parallel_nand_gas_t *)region->user;
    return convert(parallel_nand_gas_write(
        gas, (unsigned int)region->base + offset, value));
}

void parallel_nand_pcan_gas_region_init(pcan_gas_region_t *region,
                                         parallel_nand_gas_t *gas)
{
    region->base = (uint16_t)gas->base;
    region->count = PNAND_GAS_REGION_REGS;
    region->storage = 0;
    region->read = read_reg;
    region->write = write_reg;
    region->flags = 0U;
    region->user = gas;
    region->name = "parallel-nand";
}