12 #include <linux/mfd/qnap-mcu.h>
57  * @version:	MCU firmware version
68  * The QNAP-MCU uses a basic XOR checksum.
81 static int qnap_mcu_write(struct qnap_mcu *mcu, const u8 *data, u8 data_size)  in qnap_mcu_write()  argument
87 		dev_err(&mcu->serdev->dev, "data too big for transmit buffer");  in qnap_mcu_write()
94 	serdev_device_write_flush(mcu->serdev);  in qnap_mcu_write()
96 	return serdev_device_write(mcu->serdev, tx, length, HZ);  in qnap_mcu_write()
102 	struct qnap_mcu *mcu = dev_get_drvdata(dev);  in qnap_mcu_receive_buf()  local
103 	struct qnap_mcu_reply *reply = &mcu->reply;  in qnap_mcu_receive_buf()
145 int qnap_mcu_exec(struct qnap_mcu *mcu,  in qnap_mcu_exec()  argument
151 	struct qnap_mcu_reply *reply = &mcu->reply;  in qnap_mcu_exec()
155 		dev_err(&mcu->serdev->dev, "expected data too big for receive buffer");  in qnap_mcu_exec()
159 	mutex_lock(&mcu->bus_lock);  in qnap_mcu_exec()
166 	qnap_mcu_write(mcu, cmd_data, cmd_data_size);  in qnap_mcu_exec()
168 	serdev_device_wait_until_sent(mcu->serdev, msecs_to_jiffies(QNAP_MCU_TIMEOUT_MS));  in qnap_mcu_exec()
171 		dev_err(&mcu->serdev->dev, "Command timeout\n");  in qnap_mcu_exec()
177 			dev_err(&mcu->serdev->dev,  in qnap_mcu_exec()
185 	mutex_unlock(&mcu->bus_lock);  in qnap_mcu_exec()
190 int qnap_mcu_exec_with_ack(struct qnap_mcu *mcu,  in qnap_mcu_exec_with_ack()  argument
196 	ret = qnap_mcu_exec(mcu, cmd_data, cmd_data_size, ack, sizeof(ack));  in qnap_mcu_exec_with_ack()
202 		dev_err(&mcu->serdev->dev, "Did not receive ack\n");  in qnap_mcu_exec_with_ack()
210 static int qnap_mcu_get_version(struct qnap_mcu *mcu)  in qnap_mcu_get_version()  argument
217 	ret = qnap_mcu_exec(mcu, cmd, sizeof(cmd), rx, QNAP_MCU_VERSION_LEN + 2);  in qnap_mcu_get_version()
221 	memcpy(mcu->version, &rx[2], QNAP_MCU_VERSION_LEN);  in qnap_mcu_get_version()
227  * The MCU controls power to the peripherals but not the CPU.
229  * So using the PMIC to power off the system keeps the MCU and hard-drives
231  * the MCU is turned off by unplugging the power cable.
232  * Turning off the MCU alone on the other hand turns off the hard drives,
238 	struct qnap_mcu *mcu = data->cb_data;  in qnap_mcu_power_off()  local
241 	ret = qnap_mcu_exec_with_ack(mcu, cmd, sizeof(cmd));  in qnap_mcu_power_off()
243 		dev_err(&mcu->serdev->dev, "MCU poweroff failed %d\n", ret);  in qnap_mcu_power_off()
259 	{ .name = "qnap-mcu-input", },
260 	{ .name = "qnap-mcu-leds", },
261 	{ .name = "qnap-mcu-hwmon", }
267 	struct qnap_mcu *mcu;  in qnap_mcu_probe()  local
270 	mcu = devm_kzalloc(dev, sizeof(*mcu), GFP_KERNEL);  in qnap_mcu_probe()
271 	if (!mcu)  in qnap_mcu_probe()
274 	mcu->serdev = serdev;  in qnap_mcu_probe()
275 	dev_set_drvdata(dev, mcu);  in qnap_mcu_probe()
277 	mcu->variant = of_device_get_match_data(dev);  in qnap_mcu_probe()
278 	if (!mcu->variant)  in qnap_mcu_probe()
281 	mutex_init(&mcu->bus_lock);  in qnap_mcu_probe()
282 	init_completion(&mcu->reply.done);  in qnap_mcu_probe()
289 	serdev_device_set_baudrate(serdev, mcu->variant->baud_rate);  in qnap_mcu_probe()
296 	ret = qnap_mcu_get_version(mcu);  in qnap_mcu_probe()
303 					    &qnap_mcu_power_off, mcu);  in qnap_mcu_probe()
309 		qnap_mcu_cells[i].platform_data = mcu->variant;  in qnap_mcu_probe()
310 		qnap_mcu_cells[i].pdata_size = sizeof(*mcu->variant);  in qnap_mcu_probe()
322 	{ .compatible = "qnap,ts433-mcu", .data = &qnap_ts433_mcu },
330 		.name = "qnap-mcu",
337 MODULE_DESCRIPTION("QNAP MCU core driver");