5  * SPDX-License-Identifier: Apache-2.0
18 #include <zephyr/drivers/i2c.h>
34 	/** I2C address of emulator */
43 	const struct bq27z746_emul_data *data = target->data;  in emul_bq27z746_read_altmac()
48 		return -EIO;  in emul_bq27z746_read_altmac()
55 	 * 0..1: The command (for verification)  in emul_bq27z746_read_altmac()
57 	 * 34: Checksum calculated as (uint8_t)(0xFF - (sum of all command and data bytes))  in emul_bq27z746_read_altmac()
58 	 * 35: Length including command, checksum and length (e.g. data length + 4)  in emul_bq27z746_read_altmac()
61 	/* Put the command in the first two byte */  in emul_bq27z746_read_altmac()
62 	sys_put_le16(data->mac_cmd, buf);  in emul_bq27z746_read_altmac()
64 	/* Based on the command, put some data and the length into the buffer. */  in emul_bq27z746_read_altmac()
65 	/* In all of the operations, don't consider the zero-terminator. */  in emul_bq27z746_read_altmac()
66 	switch (data->mac_cmd) {  in emul_bq27z746_read_altmac()
68 		memcpy(&buf[2], manufacturer_name, sizeof(manufacturer_name) - 1);  in emul_bq27z746_read_altmac()
69 		buf[35] = sizeof(manufacturer_name) - 1 + BQ27Z746_MAC_OVERHEAD_LEN;  in emul_bq27z746_read_altmac()
72 		memcpy(&buf[2], device_name, sizeof(device_name) - 1);  in emul_bq27z746_read_altmac()
73 		buf[35] = sizeof(device_name) - 1 + BQ27Z746_MAC_OVERHEAD_LEN;  in emul_bq27z746_read_altmac()
76 		memcpy(&buf[2], device_chemistry, sizeof(device_chemistry) - 1);  in emul_bq27z746_read_altmac()
77 		buf[35] = sizeof(device_chemistry) - 1 + BQ27Z746_MAC_OVERHEAD_LEN;  in emul_bq27z746_read_altmac()
80 		LOG_ERR("ALTMAC command 0x%x is not supported", data->mac_cmd);  in emul_bq27z746_read_altmac()
81 		return -EIO;  in emul_bq27z746_read_altmac()
87 	for (int i = 0; i < BQ27Z746_MAC_COMPLETE_LEN - 2; i++) {  in emul_bq27z746_read_altmac()
90 	buf[34] = 0xFF - sum;  in emul_bq27z746_read_altmac()
97 	struct bq27z746_emul_data *data = target->data;  in emul_bq27z746_write()
102 		data->mac_cmd = sys_get_le16(&buf[1]);  in emul_bq27z746_write()
106 		return -EIO;  in emul_bq27z746_write()
117 		*val = -2;  in emul_bq27z746_reg_read()
132 		*val = -2;  in emul_bq27z746_reg_read()
141 		*val = -2;  in emul_bq27z746_reg_read()
241 		return -EIO;  in emul_bq27z746_reg_read()
267 			return -EIO;  in emul_bq27z746_read()
282 	i2c_dump_msgs_rw(target->dev, msgs, num_msgs, addr, false);  in bq27z746_emul_transfer_i2c()
285 		if (msgs->flags & I2C_MSG_READ) {  in bq27z746_emul_transfer_i2c()
287 			return -EIO;  in bq27z746_emul_transfer_i2c()
290 		return emul_bq27z746_write(target, msgs->buf, msgs->len);  in bq27z746_emul_transfer_i2c()
292 		if (msgs->flags & I2C_MSG_READ) {  in bq27z746_emul_transfer_i2c()
294 			return -EIO;  in bq27z746_emul_transfer_i2c()
296 		if (msgs->len != 1) {  in bq27z746_emul_transfer_i2c()
297 			LOG_ERR("Unexpected msg0 length %d", msgs->len);  in bq27z746_emul_transfer_i2c()
298 			return -EIO;  in bq27z746_emul_transfer_i2c()
300 		reg = msgs->buf[0];  in bq27z746_emul_transfer_i2c()
304 		if (msgs->flags & I2C_MSG_READ) {  in bq27z746_emul_transfer_i2c()
305 			rc = emul_bq27z746_read(target, reg, msgs->buf, msgs->len);  in bq27z746_emul_transfer_i2c()
310 			LOG_ERR("Second message must be an I2C write");  in bq27z746_emul_transfer_i2c()
311 			return -EIO;  in bq27z746_emul_transfer_i2c()
316 		return -EIO;  in bq27z746_emul_transfer_i2c()
327  * Set up a new emulator (I2C)