| /* |
| * 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); |