4  * SPDX-License-Identifier: Apache-2.0
61 	 * Fetch word using sys_get_le32, which performs byte-sized  in read_mem_u32()
62 	 * reads instead of word-sized. This is important as ptr may  in read_mem_u32()
64 	 * stored in little-endian inside the flash.  in read_mem_u32()
76 		READ_BIT(FLASH->SIZE, FLASH_FLASH_SIZE_FLASH_SIZE) + 1;  in get_flash_size_in_bytes()
90 	 *  - illegal command  in error_from_irq_flags()
91 	 *  - command error  in error_from_irq_flags()
94 		return -EINVAL;  in error_from_irq_flags()
98 		return -EIO;  in error_from_irq_flags()
102 	 * Unexpected error flag -> "out of domain"  in error_from_irq_flags()
105 	return -EDOM;  in error_from_irq_flags()
109 				off_t offset, uint32_t len)  in is_valid_flash_range()  argument
111 	const struct flash_wb0x_data *data = dev->data;  in is_valid_flash_range()
114 		/* (offset + len) must not overflow */  in is_valid_flash_range()
115 	return !u32_add_overflow(offset, len, &offset_plus_len)  in is_valid_flash_range()
116 		/* offset must be a valid offset in flash */  in is_valid_flash_range()
117 		&& IN_RANGE(offset, 0, data->flash_size - 1)  in is_valid_flash_range()
118 		/* (offset + len) must be in [0; flash size]  in is_valid_flash_range()
121 		 * bytes starting at `offset` touches bytes  in is_valid_flash_range()
122 		 * `offset` to `offset + len` EXCLUDED)  in is_valid_flash_range()
124 		&& IN_RANGE(offset_plus_len, 0, data->flash_size);  in is_valid_flash_range()
128 				off_t offset, uint32_t len)  in is_writeable_flash_range()  argument
130 	if ((offset % WRITE_BLOCK_SIZE) != 0  in is_writeable_flash_range()
135 	return is_valid_flash_range(dev, offset, len);  in is_writeable_flash_range()
139 				off_t offset, uint32_t len)  in is_erasable_flash_range()  argument
141 	if ((offset % ERASE_BLOCK_SIZE) != 0  in is_erasable_flash_range()
146 	return is_valid_flash_range(dev, offset, len);  in is_erasable_flash_range()
159 		flags = FLASH->IRQRAW;  in poll_flash_controller()
163 	FLASH->IRQRAW = flags;  in poll_flash_controller()
173 	FLASH->IRQRAW = FLASH->IRQRAW;  in execute_flash_command()
176 	FLASH->COMMAND = cmd;  in execute_flash_command()
207 	__ASSERT_NO_MSG((start_page + page_count - 1) < PAGES_IN_FLASH);  in erase_page_range()
213 		 * ADDRESS[8:0]  = 0 (row & word address, must be 0)  in erase_page_range()
215 		FLASH->ADDRESS = (i << 9);  in erase_page_range()
236 	 * Note that @p buf may not be aligned to 32-bit boundary.  in write_word_range()
246 	 *  - write single words using WRITE commands until the write  in write_word_range()
249 	 *  - after write address is aligned to quadword, we can use  in write_word_range()
252 	 *  - once less than 4 words remain to write, a last BURSTWRITE  in write_word_range()
259 		FLASH->ADDRESS = dst_addr;  in write_word_range()
260 		FLASH->DATA0 = read_mem_u32(src_ptr);  in write_word_range()
269 		remaining--;  in write_word_range()
276 		FLASH->ADDRESS = dst_addr;  in write_word_range()
277 		FLASH->DATA0 = read_mem_u32(src_ptr + 0);  in write_word_range()
278 		FLASH->DATA1 = read_mem_u32(src_ptr + 1);  in write_word_range()
279 		FLASH->DATA2 = read_mem_u32(src_ptr + 2);  in write_word_range()
280 		FLASH->DATA3 = read_mem_u32(src_ptr + 3);  in write_word_range()
289 		remaining -= WORDS_IN_BURST;  in write_word_range()
297 		FLASH->ADDRESS = dst_addr;  in write_word_range()
298 		FLASH->DATA0 = read_mem_u32(src_ptr + 0);  in write_word_range()
300 		FLASH->DATA1 = (remaining >= 2)  in write_word_range()
304 		FLASH->DATA2 = (remaining == 3)  in write_word_range()
308 		FLASH->DATA3 = BURST_IGNORE_VALUE;  in write_word_range()
321 int flash_wb0x_read(const struct device *dev, off_t offset,  in flash_wb0x_read()  argument
328 	if (!is_valid_flash_range(dev, offset, len)) {  in flash_wb0x_read()
329 		return -EINVAL;  in flash_wb0x_read()
334 	memcpy(buffer, flash_base + (uint32_t)offset, len);  in flash_wb0x_read()
339 int flash_wb0x_write(const struct device *dev, off_t offset,  in flash_wb0x_write()  argument
342 	struct flash_wb0x_data *data = dev->data;  in flash_wb0x_write()
349 	if (!is_writeable_flash_range(dev, offset, len)) {  in flash_wb0x_write()
350 		return -EINVAL;  in flash_wb0x_write()
354 	res = k_sem_take(&data->write_lock, K_NO_WAIT);  in flash_wb0x_write()
359 	const uint32_t start_word = (uint32_t)offset / WORD_SIZE;  in flash_wb0x_write()
365 	k_sem_give(&data->write_lock);  in flash_wb0x_write()
370 int flash_wb0x_erase(const struct device *dev, off_t offset, size_t size)  in flash_wb0x_erase()  argument
372 	struct flash_wb0x_data *data = dev->data;  in flash_wb0x_erase()
379 	if (!is_erasable_flash_range(dev, offset, size)) {  in flash_wb0x_erase()
380 		return -EINVAL;  in flash_wb0x_erase()
384 	res = k_sem_take(&data->write_lock, K_NO_WAIT);  in flash_wb0x_erase()
389 	const uint32_t start_page = (uint32_t)offset / ERASE_BLOCK_SIZE;  in flash_wb0x_erase()
395 	k_sem_give(&data->write_lock);  in flash_wb0x_erase()
443 	struct flash_wb0x_data *data = dev->data;  in stm32wb0x_flash_init()
445 	k_sem_init(&data->write_lock, 1, 1);  in stm32wb0x_flash_init()
447 	data->flash_size = get_flash_size_in_bytes();  in stm32wb0x_flash_init()