4  * SPDX-License-Identifier: Apache-2.0
33 static bool write_range_is_valid(off_t offset, uint32_t size);
34 static bool read_range_is_valid(off_t offset, uint32_t size);
35 static int erase_flash_block(off_t offset, size_t size);
38 static int flash_gecko_read(const struct device *dev, off_t offset,  in flash_gecko_read()  argument
40 			    size_t size)  in flash_gecko_read()  argument
42 	if (!read_range_is_valid(offset, size)) {  in flash_gecko_read()
43 		return -EINVAL;  in flash_gecko_read()
46 	if (!size) {  in flash_gecko_read()
50 	memcpy(data, (uint8_t *)CONFIG_FLASH_BASE_ADDRESS + offset, size);  in flash_gecko_read()
55 static int flash_gecko_write(const struct device *dev, off_t offset,  in flash_gecko_write()  argument
56 			     const void *data, size_t size)  in flash_gecko_write()  argument
58 	struct flash_gecko_data *const dev_data = dev->data;  in flash_gecko_write()
63 	if (!write_range_is_valid(offset, size)) {  in flash_gecko_write()
64 		return -EINVAL;  in flash_gecko_write()
67 	if (!size) {  in flash_gecko_write()
71 	k_sem_take(&dev_data->mutex, K_FOREVER);  in flash_gecko_write()
75 	msc_ret = MSC_WriteWord(address, data, size);  in flash_gecko_write()
77 		ret = -EIO;  in flash_gecko_write()
81 	k_sem_give(&dev_data->mutex);  in flash_gecko_write()
86 static int flash_gecko_erase(const struct device *dev, off_t offset,  in flash_gecko_erase()  argument
87 			     size_t size)  in flash_gecko_erase()  argument
89 	struct flash_gecko_data *const dev_data = dev->data;  in flash_gecko_erase()
92 	if (!read_range_is_valid(offset, size)) {  in flash_gecko_erase()
93 		return -EINVAL;  in flash_gecko_erase()
98 		return -EINVAL;  in flash_gecko_erase()
101 	if ((size % FLASH_PAGE_SIZE) != 0) {  in flash_gecko_erase()
102 		LOG_ERR("size %zu: not multiple of a page size", size);  in flash_gecko_erase()
103 		return -EINVAL;  in flash_gecko_erase()
106 	if (!size) {  in flash_gecko_erase()
110 	k_sem_take(&dev_data->mutex, K_FOREVER);  in flash_gecko_erase()
113 	ret = erase_flash_block(offset, size);  in flash_gecko_erase()
116 	k_sem_give(&dev_data->mutex);  in flash_gecko_erase()
125 		MSC->LOCK = 0;  in flash_gecko_write_protection()
129 		MSC->LOCK = MSC_LOCK_LOCKKEY_UNLOCK;  in flash_gecko_write_protection()
131 		MSC->LOCK = MSC_UNLOCK_CODE;  in flash_gecko_write_protection()
137  * - A flash address to write to must be aligned to words.
138  * - Number of bytes to write must be divisible by 4.
140 static bool write_range_is_valid(off_t offset, uint32_t size)  in write_range_is_valid()  argument
142 	return read_range_is_valid(offset, size)  in write_range_is_valid()
144 		&& (size % 4 == 0U);  in write_range_is_valid()
147 static bool read_range_is_valid(off_t offset, uint32_t size)  in read_range_is_valid()  argument
149 	return (offset + size) <= (CONFIG_FLASH_SIZE * 1024);  in read_range_is_valid()
152 static int erase_flash_block(off_t offset, size_t size)  in erase_flash_block()  argument
158 	for (off_t tmp = offset; tmp < offset + size; tmp += FLASH_PAGE_SIZE) {  in erase_flash_block()
162 			ret = -EIO;  in erase_flash_block()
177 void flash_gecko_page_layout(const struct device *dev,  in flash_gecko_page_layout()  argument
187 flash_gecko_get_parameters(const struct device *dev)  in flash_gecko_get_parameters()  argument
189 	ARG_UNUSED(dev);  in flash_gecko_get_parameters()
194 static int flash_gecko_get_size(const struct device *dev, uint64_t *size)  in flash_gecko_get_size()  argument
196 	ARG_UNUSED(dev);  in flash_gecko_get_size()
198 	*size = (uint64_t)DT_REG_SIZE(SOC_NV_FLASH_NODE);  in flash_gecko_get_size()
203 static int flash_gecko_init(const struct device *dev)  in flash_gecko_init()  argument
205 	struct flash_gecko_data *const dev_data = dev->data;  in flash_gecko_init()
207 	k_sem_init(&dev_data->mutex, 1, 1);  in flash_gecko_init()
212 	MSC->LOCK = 0;  in flash_gecko_init()
214 	LOG_INF("Device %s initialized", dev->name);  in flash_gecko_init()