| /* |
| * Copyright (c) 2016 Intel Corporation. |
| * |
| * 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://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 <errno.h> |
| |
| #include <nanokernel.h> |
| #include <device.h> |
| #include <init.h> |
| |
| #include <flash.h> |
| |
| #include "qm_flash.h" |
| #include "qm_soc_regs.h" |
| |
| static inline bool is_aligned_32(uint32_t data) |
| { |
| return (data & 0x3) ? false : true; |
| } |
| |
| static qm_flash_region_t flash_region(uint32_t addr) |
| { |
| if ((addr >= QM_FLASH_REGION_SYS_0_BASE) && (addr < |
| (QM_FLASH_REGION_SYS_0_BASE + CONFIG_SOC_FLASH_QMSI_SYS_SIZE))) { |
| return QM_FLASH_REGION_SYS; |
| } |
| |
| #if defined(CONFIG_SOC_QUARK_D2000) |
| if ((addr >= QM_FLASH_REGION_DATA_0_BASE) && |
| (addr < (QM_FLASH_REGION_DATA_0_BASE + |
| QM_FLASH_REGION_DATA_0_SIZE))) { |
| return QM_FLASH_REGION_DATA; |
| } |
| #endif |
| |
| /* invalid address */ |
| return QM_FLASH_REGION_NUM; |
| } |
| |
| static uint32_t get_page_num(uint32_t addr) |
| { |
| switch (flash_region(addr)) { |
| case QM_FLASH_REGION_SYS: |
| return (addr - QM_FLASH_REGION_SYS_0_BASE) >> |
| QM_FLASH_PAGE_SIZE_BITS; |
| #if defined(CONFIG_SOC_QUARK_D2000) |
| case QM_FLASH_REGION_DATA: |
| return (addr - QM_FLASH_REGION_DATA_0_BASE) >> |
| QM_FLASH_PAGE_SIZE_BITS; |
| #endif |
| default: |
| /* invalid address */ |
| return 0xffffffff; |
| } |
| } |
| |
| static int flash_qmsi_read(struct device *dev, off_t addr, |
| void *data, size_t len) |
| { |
| if ((!is_aligned_32(len)) || (!is_aligned_32(addr))) { |
| return -EINVAL; |
| } |
| |
| if (flash_region(addr) == QM_FLASH_REGION_NUM) { |
| /* starting address is not within flash */ |
| return -EIO; |
| } |
| |
| if (flash_region(addr + len - 4) == QM_FLASH_REGION_NUM) { |
| /* data area is not within flash */ |
| return -EIO; |
| } |
| |
| for (uint32_t i = 0; i < (len >> 2); i++) { |
| UNALIGNED_PUT(sys_read32(addr + (i << 2)), |
| (uint32_t *)data + i); |
| } |
| |
| return 0; |
| } |
| |
| static int flash_qmsi_write(struct device *dev, off_t addr, |
| const void *data, size_t len) |
| { |
| qm_flash_t flash = QM_FLASH_0; |
| qm_flash_region_t reg; |
| uint32_t data_word = 0, offset = 0, f_addr = 0; |
| |
| if ((!is_aligned_32(len)) || (!is_aligned_32(addr))) { |
| return -EINVAL; |
| } |
| |
| reg = flash_region(addr); |
| if (reg == QM_FLASH_REGION_NUM) { |
| return -EIO; |
| } |
| |
| if (flash_region(addr + len - 4) == QM_FLASH_REGION_NUM) { |
| return -EIO; |
| } |
| |
| for (uint32_t i = 0; i < (len >> 2); i++) { |
| data_word = UNALIGNED_GET((uint32_t *)data + i); |
| reg = flash_region(addr + (i << 2)); |
| f_addr = addr + (i << 2); |
| |
| switch (reg) { |
| case QM_FLASH_REGION_SYS: |
| offset = f_addr - QM_FLASH_REGION_SYS_0_BASE; |
| break; |
| #if defined(CONFIG_SOC_QUARK_D2000) |
| case QM_FLASH_REGION_DATA: |
| offset = f_addr - QM_FLASH_REGION_DATA_0_BASE; |
| break; |
| #endif |
| default: |
| return -EIO; |
| } |
| |
| #if defined(CONFIG_SOC_QUARK_SE) |
| if (offset >= (CONFIG_SOC_FLASH_QMSI_SYS_SIZE >> 1)) { |
| flash = QM_FLASH_1; |
| offset -= CONFIG_SOC_FLASH_QMSI_SYS_SIZE >> 1; |
| } |
| #endif |
| |
| qm_flash_word_write(flash, reg, offset, data_word); |
| } |
| |
| return 0; |
| } |
| |
| static int flash_qmsi_erase(struct device *dev, off_t addr, size_t size) |
| { |
| qm_flash_t flash = QM_FLASH_0; |
| qm_flash_region_t reg; |
| uint32_t page = 0; |
| |
| /* starting address needs to be a 2KB aligned address */ |
| if (addr & QM_FLASH_ADDRESS_MASK) { |
| return -EINVAL; |
| } |
| |
| /* size needs to be multiple of 2KB */ |
| if (size & QM_FLASH_ADDRESS_MASK) { |
| return -EINVAL; |
| } |
| |
| reg = flash_region(addr); |
| if (reg == QM_FLASH_REGION_NUM) { |
| return -EIO; |
| } |
| |
| if (flash_region(addr + size - (QM_FLASH_PAGE_SIZE_DWORDS << 2)) == |
| QM_FLASH_REGION_NUM) { |
| return -EIO; |
| } |
| |
| for (uint32_t i = 0; i < (size >> QM_FLASH_PAGE_SIZE_BITS); i++) { |
| page = get_page_num(addr) + i; |
| #if defined(CONFIG_SOC_QUARK_SE) |
| if (page >= (CONFIG_SOC_FLASH_QMSI_SYS_SIZE >> |
| (QM_FLASH_PAGE_SIZE_BITS + 1))) { |
| flash = QM_FLASH_1; |
| page -= (CONFIG_SOC_FLASH_QMSI_SYS_SIZE >> |
| (QM_FLASH_PAGE_SIZE_BITS + 1)); |
| } |
| #endif |
| qm_flash_page_erase(flash, reg, page); |
| } |
| |
| return 0; |
| } |
| |
| static int flash_qmsi_write_protection(struct device *dev, bool enable) |
| { |
| qm_flash_config_t qm_cfg; |
| |
| qm_cfg.us_count = CONFIG_SOC_FLASH_QMSI_CLK_COUNT_US; |
| qm_cfg.wait_states = CONFIG_SOC_FLASH_QMSI_WAIT_STATES; |
| |
| if (enable) { |
| qm_cfg.write_disable = QM_FLASH_WRITE_DISABLE; |
| } else { |
| qm_cfg.write_disable = QM_FLASH_WRITE_ENABLE; |
| } |
| |
| qm_flash_set_config(QM_FLASH_0, &qm_cfg); |
| |
| #if defined(CONFIG_SOC_QUARK_SE) |
| qm_flash_set_config(QM_FLASH_1, &qm_cfg); |
| #endif |
| |
| return 0; |
| } |
| |
| static struct flash_driver_api flash_qmsi_api = { |
| .read = flash_qmsi_read, |
| .write = flash_qmsi_write, |
| .erase = flash_qmsi_erase, |
| .write_protection = flash_qmsi_write_protection, |
| }; |
| |
| static int quark_flash_init(struct device *dev) |
| { |
| qm_flash_config_t qm_cfg; |
| |
| dev->driver_api = &flash_qmsi_api; |
| |
| qm_cfg.us_count = CONFIG_SOC_FLASH_QMSI_CLK_COUNT_US; |
| qm_cfg.wait_states = CONFIG_SOC_FLASH_QMSI_WAIT_STATES; |
| qm_cfg.write_disable = QM_FLASH_WRITE_ENABLE; |
| |
| qm_flash_set_config(QM_FLASH_0, &qm_cfg); |
| |
| #if defined(CONFIG_SOC_QUARK_SE) |
| qm_flash_set_config(QM_FLASH_1, &qm_cfg); |
| #endif |
| |
| return 0; |
| } |
| |
| DEVICE_INIT(quark_flash, CONFIG_SOC_FLASH_QMSI_DEV_NAME, |
| quark_flash_init, NULL, NULL, SECONDARY, |
| CONFIG_KERNEL_INIT_PRIORITY_DEVICE); |