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/*
* Copyright (c) 2020 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <string.h>
#include <zephyr/drivers/flash.h>
#include <errno.h>
#include <zephyr/init.h>
#include <soc.h>
#include "flash_priv.h"
#include "fsl_common.h"
#include "fsl_flashiap.h"
#if DT_NODE_HAS_STATUS(DT_INST(0, nxp_iap_fmc11), okay)
#define DT_DRV_COMPAT nxp_iap_fmc11
#elif DT_NODE_HAS_STATUS(DT_INST(0, nxp_iap_fmc54), okay)
#define DT_DRV_COMPAT nxp_iap_fmc54
#else
#error No matching compatible for soc_flash_lpc.c
#endif
#define SOC_NV_FLASH_NODE DT_INST(0, soc_nv_flash)
struct flash_priv {
/* HACK: flash write protection is managed in software. */
struct k_sem write_lock;
uint32_t pflash_block_base;
uint32_t sector_size;
};
static const struct flash_parameters flash_lpc_parameters = {
#if DT_NODE_HAS_PROP(SOC_NV_FLASH_NODE, write_block_size)
.write_block_size = DT_PROP(SOC_NV_FLASH_NODE, write_block_size),
#else
.write_block_size = FSL_FEATURE_FLASH_PFLASH_BLOCK_WRITE_UNIT_SIZE,
#endif
.erase_value = 0xff,
};
static inline void prepare_erase_write(off_t offset, size_t len,
uint32_t sector_size)
{
uint32_t start;
uint32_t stop;
start = offset / sector_size;
stop = (offset+len-1) / sector_size;
FLASHIAP_PrepareSectorForWrite(start, stop);
}
static int flash_lpc_erase(const struct device *dev, off_t offset, size_t len)
{
struct flash_priv *priv = dev->data;
status_t rc;
unsigned int key;
uint32_t start;
uint32_t stop;
uint32_t page_size;
if (k_sem_take(&priv->write_lock, K_FOREVER)) {
return -EACCES;
}
key = irq_lock();
prepare_erase_write(offset, len, priv->sector_size);
page_size = flash_lpc_parameters.write_block_size;
start = offset / page_size;
stop = (offset+len-1) / page_size;
rc = FLASHIAP_ErasePage(start, stop,
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC);
irq_unlock(key);
k_sem_give(&priv->write_lock);
return (rc == kStatus_FLASHIAP_Success) ? 0 : -EINVAL;
}
static int flash_lpc_read(const struct device *dev, off_t offset,
void *data, size_t len)
{
struct flash_priv *priv = dev->data;
uint32_t addr;
addr = offset + priv->pflash_block_base;
memcpy(data, (void *) addr, len);
return 0;
}
static int flash_lpc_write(const struct device *dev, off_t offset,
const void *data, size_t len)
{
struct flash_priv *priv = dev->data;
uint32_t addr;
status_t rc;
unsigned int key;
if (k_sem_take(&priv->write_lock, K_FOREVER)) {
return -EACCES;
}
addr = offset + priv->pflash_block_base;
key = irq_lock();
prepare_erase_write(offset, len, priv->sector_size);
rc = FLASHIAP_CopyRamToFlash(addr, (uint32_t *) data, len,
CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC);
irq_unlock(key);
k_sem_give(&priv->write_lock);
return (rc == kStatus_FLASHIAP_Success) ? 0 : -EINVAL;
}
#if defined(CONFIG_FLASH_PAGE_LAYOUT)
static const struct flash_pages_layout dev_layout = {
.pages_count = DT_REG_SIZE(SOC_NV_FLASH_NODE) /
DT_PROP(SOC_NV_FLASH_NODE, erase_block_size),
.pages_size = DT_PROP(SOC_NV_FLASH_NODE, erase_block_size),
};
static void flash_lpc_pages_layout(const struct device *dev,
const struct flash_pages_layout **layout,
size_t *layout_size)
{
*layout = &dev_layout;
*layout_size = 1;
}
#endif /* CONFIG_FLASH_PAGE_LAYOUT */
static const struct flash_parameters *
flash_lpc_get_parameters(const struct device *dev)
{
ARG_UNUSED(dev);
return &flash_lpc_parameters;
}
static struct flash_priv flash_data;
static const struct flash_driver_api flash_lpc_api = {
.erase = flash_lpc_erase,
.write = flash_lpc_write,
.read = flash_lpc_read,
.get_parameters = flash_lpc_get_parameters,
#if defined(CONFIG_FLASH_PAGE_LAYOUT)
.page_layout = flash_lpc_pages_layout,
#endif
};
static int flash_lpc_init(const struct device *dev)
{
struct flash_priv *priv = dev->data;
k_sem_init(&priv->write_lock, 1, 1);
priv->pflash_block_base = DT_REG_ADDR(SOC_NV_FLASH_NODE);
#if defined(FSL_FEATURE_SYSCON_FLASH_SECTOR_SIZE_BYTES)
priv->sector_size = FSL_FEATURE_SYSCON_FLASH_SECTOR_SIZE_BYTES;
#else
#error "Sector size not set"
#endif
return 0;
}
DEVICE_DT_INST_DEFINE(0, flash_lpc_init, NULL,
&flash_data, NULL, POST_KERNEL,
CONFIG_FLASH_INIT_PRIORITY, &flash_lpc_api);