MXRT1050: Add support for Flash driver

Signed-off-by: Mahesh Mahadevan <[email protected]>

targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_IMX/flash_api.c

@@ -0,0 +1,374 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http:https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "flash_api.h"
+#include "mbed_toolchain.h"
+#include "mbed_critical.h"
+
+#if DEVICE_FLASH
+
+#include "fsl_flexspi.h"
+#include "fsl_cache.h"
+#include "flash_defines.h"
+
+AT_QUICKACCESS_SECTION_CODE(void flexspi_update_lut_ram(void));
+AT_QUICKACCESS_SECTION_CODE(status_t flexspi_nor_write_enable_ram(uint32_t baseAddr));
+AT_QUICKACCESS_SECTION_CODE(status_t flexspi_nor_wait_bus_busy_ram(void));
+AT_QUICKACCESS_SECTION_CODE(status_t flexspi_nor_flash_erase_sector_ram(uint32_t address));
+AT_QUICKACCESS_SECTION_CODE(static void flexspi_lower_clock_ram(void));
+AT_QUICKACCESS_SECTION_CODE(static void flexspi_clock_update_ram(void));
+AT_QUICKACCESS_SECTION_CODE(status_t flexspi_nor_flash_page_program_ram(uint32_t address,
+ const uint32_t *src,
+ uint32_t size));
+AT_QUICKACCESS_SECTION_CODE(void flexspi_nor_flash_read_data_ram(uint32_t addr,
+ uint32_t *buffer,
+ uint32_t size));
+
+void flexspi_update_lut_ram(void)
+{
+ flexspi_config_t config;
+
+ memset(&config, 0, sizeof(config));
+
+ /*Get FLEXSPI default settings and configure the flexspi. */
+ FLEXSPI_GetDefaultConfig(&config);
+
+ /*Set AHB buffer size for reading data through AHB bus. */
+ config.ahbConfig.enableAHBPrefetch = true;
+ /*Allow AHB read start address do not follow the alignment requirement. */
+ config.ahbConfig.enableReadAddressOpt = true;
+ config.ahbConfig.enableAHBBufferable = true;
+ config.ahbConfig.enableAHBCachable = true;
+ /* enable diff clock and DQS */
+ config.enableSckBDiffOpt = true;
+ config.rxSampleClock = kFLEXSPI_ReadSampleClkExternalInputFromDqsPad;
+ config.enableCombination = true;
+ FLEXSPI_Init(FLEXSPI, &config);
+
+ /* Configure flash settings according to serial flash feature. */
+ FLEXSPI_SetFlashConfig(FLEXSPI, &deviceconfig, kFLEXSPI_PortA1);
+
+ /* Update LUT table. */
+ FLEXSPI_UpdateLUT(FLEXSPI, 0, customLUT, CUSTOM_LUT_LENGTH);
+
+ FLEXSPI_SoftwareReset(FLEXSPI);
+
+ /* Wait for bus idle. */
+ while (!FLEXSPI_GetBusIdleStatus(FLEXSPI)) {
+ }
+}
+
+status_t flexspi_nor_write_enable_ram(uint32_t baseAddr)
+{
+ flexspi_transfer_t flashXfer;
+ status_t status = kStatus_Success;
+
+ memset(&flashXfer, 0, sizeof(flashXfer));
+
+ /* Write enable */
+ flashXfer.deviceAddress = baseAddr;
+ flashXfer.port = kFLEXSPI_PortA1;
+ flashXfer.cmdType = kFLEXSPI_Command;
+ flashXfer.SeqNumber = 2;
+ flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_WRITEENABLE;
+
+ status = FLEXSPI_TransferBlocking(FLEXSPI, &flashXfer);
+
+ return status;
+}
+
+status_t flexspi_nor_wait_bus_busy_ram(void)
+{
+ /* Wait status ready. */
+ bool isBusy = false;
+ uint32_t readValue = 0;
+ status_t status = kStatus_Success;
+ flexspi_transfer_t flashXfer;
+
+ memset(&flashXfer, 0, sizeof(flashXfer));
+
+ flashXfer.deviceAddress = 0;
+ flashXfer.port = kFLEXSPI_PortA1;
+ flashXfer.cmdType = kFLEXSPI_Read;
+ flashXfer.SeqNumber = 2;
+ flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_READSTATUS;
+ flashXfer.data = &readValue;
+ flashXfer.dataSize = 2;
+
+ do {
+ status = FLEXSPI_TransferBlocking(FLEXSPI, &flashXfer);
+
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ if (readValue & 0x8000) {
+ isBusy = false;
+ } else {
+ isBusy = true;
+ }
+
+ if (readValue & 0x3200) {
+ status = kStatus_Fail;
+ break;
+ }
+
+ } while (isBusy);
+
+ return status;
+
+}
+
+status_t flexspi_nor_flash_erase_sector_ram(uint32_t address)
+{
+ status_t status = kStatus_Success;
+ flexspi_transfer_t flashXfer;
+
+ memset(&flashXfer, 0, sizeof(flashXfer));
+
+ /* Write enable */
+ status = flexspi_nor_write_enable_ram(address);
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ flashXfer.deviceAddress = address;
+ flashXfer.port = kFLEXSPI_PortA1;
+ flashXfer.cmdType = kFLEXSPI_Command;
+ flashXfer.SeqNumber = 4;
+ flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_ERASESECTOR;
+
+ status = FLEXSPI_TransferBlocking(FLEXSPI, &flashXfer);
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ status = flexspi_nor_wait_bus_busy_ram();
+
+ /* Do software reset. */
+ FLEXSPI_SoftwareReset(FLEXSPI);
+
+ return status;
+}
+
+static void flexspi_lower_clock_ram(void)
+{
+ unsigned int reg = 0;
+
+ /* Wait for bus idle. */
+ while (!FLEXSPI_GetBusIdleStatus(FLEXSPI)) {
+ }
+
+ FLEXSPI_Enable(FLEXSPI, false);
+
+ /* Disable FlexSPI clock */
+ CCM->CCGR6 &= ~CCM_CCGR6_CG5_MASK;
+
+ /* flexspi clock 66M, DDR mode, internal clock 33M. */
+ reg = CCM->CSCMR1;
+ reg &= ~CCM_CSCMR1_FLEXSPI_PODF_MASK;
+ reg |= CCM_CSCMR1_FLEXSPI_PODF(3);
+ CCM->CSCMR1 = reg;
+
+ /* Enable FlexSPI clock */
+ CCM->CCGR6 |= CCM_CCGR6_CG5_MASK;
+
+ FLEXSPI_Enable(FLEXSPI, true);
+
+ /* Do software reset. */
+ FLEXSPI_SoftwareReset(FLEXSPI);
+
+ /* Wait for bus idle. */
+ while (!FLEXSPI_GetBusIdleStatus(FLEXSPI)) {
+ }
+}
+
+static void flexspi_clock_update_ram(void)
+{
+ /* Program finished, speed the clock to 133M. */
+ /* Wait for bus idle before change flash configuration. */
+ while (!FLEXSPI_GetBusIdleStatus(FLEXSPI)) {
+ }
+ FLEXSPI_Enable(FLEXSPI, false);
+ /* Disable FlexSPI clock */
+ CCM->CCGR6 &= ~CCM_CCGR6_CG5_MASK;
+
+ /* flexspi clock 260M, DDR mode, internal clock 130M. */
+ CCM->CSCMR1 &= ~CCM_CSCMR1_FLEXSPI_PODF_MASK;
+
+ /* Enable FlexSPI clock */
+ CCM->CCGR6 |= CCM_CCGR6_CG5_MASK;
+
+ FLEXSPI_Enable(FLEXSPI, true);
+
+ /* Do software reset. */
+ FLEXSPI_SoftwareReset(FLEXSPI);
+
+ /* Wait for bus idle. */
+ while (!FLEXSPI_GetBusIdleStatus(FLEXSPI)) {
+ }
+}
+
+status_t flexspi_nor_flash_page_program_ram(uint32_t address, const uint32_t *src, uint32_t size)
+{
+ status_t status = kStatus_Success;
+ flexspi_transfer_t flashXfer;
+ uint32_t offset = 0;
+
+ memset(&flashXfer, 0, sizeof(flashXfer));
+
+ flexspi_lower_clock_ram();
+
+ while (size > 0) {
+ /* Write enable */
+ status = flexspi_nor_write_enable_ram(address + offset);
+
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ /* Prepare page program command */
+ flashXfer.deviceAddress = address + offset;
+ flashXfer.port = kFLEXSPI_PortA1;
+ flashXfer.cmdType = kFLEXSPI_Write;
+ flashXfer.SeqNumber = 2;
+ flashXfer.seqIndex = HYPERFLASH_CMD_LUT_SEQ_IDX_PAGEPROGRAM;
+ flashXfer.data = (uint32_t *)(src + offset);
+ flashXfer.dataSize = BOARD_FLASH_PAGE_SIZE;
+
+ status = FLEXSPI_TransferBlocking(FLEXSPI, &flashXfer);
+
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ status = flexspi_nor_wait_bus_busy_ram();
+
+ if (status != kStatus_Success) {
+ return status;
+ }
+
+ size -= BOARD_FLASH_PAGE_SIZE;
+ offset += BOARD_FLASH_PAGE_SIZE;
+ }
+
+ flexspi_clock_update_ram();
+
+ return status;
+}
+
+void flexspi_nor_flash_read_data_ram(uint32_t addr, uint32_t *buffer, uint32_t size)
+{
+ memcpy(buffer, (void *)addr, size);
+}
+
+int32_t flash_init(flash_t *obj)
+{
+ flexspi_update_lut_ram();
+
+ return 0;
+}
+
+int32_t flash_erase_sector(flash_t *obj, uint32_t address)
+{
+ status_t status = kStatus_Success;
+ int32_t ret = 0;
+
+ core_util_critical_section_enter();
+
+ status = flexspi_nor_flash_erase_sector_ram(address - FlexSPI_AMBA_BASE);
+
+ if (status != kStatus_Success) {
+ ret = -1;
+ } else {
+ DCACHE_InvalidateByRange(address, BOARD_FLASH_SECTOR_SIZE);
+ }
+
+ core_util_critical_section_exit();
+
+ return ret;
+}
+
+int32_t flash_program_page(flash_t *obj, uint32_t address, const uint8_t *data, uint32_t size)
+{
+ status_t status = kStatus_Success;
+ int32_t ret = 0;
+
+ core_util_critical_section_enter();
+
+ status = flexspi_nor_flash_page_program_ram(address - FlexSPI_AMBA_BASE, (uint32_t *)data, size);
+
+ if (status != kStatus_Success) {
+ ret = -1;
+ } else {
+ DCACHE_InvalidateByRange(address, size);
+ }
+
+ core_util_critical_section_exit();
+
+ return ret;
+}
+
+int32_t flash_read(flash_t *obj, uint32_t address, uint8_t *data, uint32_t size)
+{
+ flexspi_nor_flash_read_data_ram(address, (uint32_t *)data, size);
+
+ return 0;
+}
+
+int32_t flash_free(flash_t *obj)
+{
+ return 0;
+}
+
+uint32_t flash_get_sector_size(const flash_t *obj, uint32_t address)
+{
+ uint32_t sectorsize = MBED_FLASH_INVALID_SIZE;
+ uint32_t devicesize = BOARD_FLASH_SIZE;
+ uint32_t startaddr = BOARD_FLASH_START_ADDR;
+
+ if ((address >= startaddr) && (address < (startaddr + devicesize))) {
+ sectorsize = BOARD_FLASH_SECTOR_SIZE;
+ }
+
+ return sectorsize;
+}
+
+uint32_t flash_get_page_size(const flash_t *obj)
+{
+ return BOARD_FLASH_PAGE_SIZE;
+}
+
+uint32_t flash_get_start_address(const flash_t *obj)
+{
+ return BOARD_FLASH_START_ADDR;
+}
+
+uint32_t flash_get_size(const flash_t *obj)
+{
+ return BOARD_FLASH_SIZE;
+}
+
+uint8_t flash_get_erase_value(const flash_t *obj)
+{
+ (void)obj;
+
+ return 0xFF;
+}
+
+#endif //DEVICE_FLASH
+

targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_IMX/objects.h

@@ -66,6 +66,12 @@ struct trng_s {
  uint8_t dummy;
 };
 
+#if DEVICE_FLASH
+struct flash_s {
+ uint8_t dummy;
+};
+#endif
+
 #include "gpio_object.h"
 
 #ifdef __cplusplus