1 // SPDX-License-Identifier: GPL-2.0
3  * CZ.NIC's Turris Omnia MCU driver
19 #include <linux/turris-omnia-mcu-interface.h>
20 #include "turris-omnia-mcu.h"
33 	msgs[0].addr = client->addr;  in omnia_cmd_write_read()
40 		msgs[1].addr = client->addr;  in omnia_cmd_write_read()
47 	ret = i2c_transfer(client->adapter, msgs, num);  in omnia_cmd_write_read()
51 		return -EIO;  in omnia_cmd_write_read()
56 static int omnia_get_version_hash(struct omnia_mcu *mcu, bool bootloader,  in omnia_get_version_hash()  argument
63 	err = omnia_cmd_read(mcu->client,  in omnia_get_version_hash()
79 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in fw_version_hash_show()  local
83 	err = omnia_get_version_hash(mcu, bootloader, version);  in fw_version_hash_show()
109 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in fw_features_show()  local
111 	return sysfs_emit(buf, "0x%x\n", mcu->features);  in fw_features_show()
118 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in mcu_type_show()  local
120 	return sysfs_emit(buf, "%s\n", mcu->type);  in mcu_type_show()
142 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in serial_number_show()  local
144 	return sysfs_emit(buf, "%016llX\n", mcu->board_serial_number);  in serial_number_show()
151 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in first_mac_address_show()  local
153 	return sysfs_emit(buf, "%pM\n", mcu->board_first_mac);  in first_mac_address_show()
160 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in board_revision_show()  local
162 	return sysfs_emit(buf, "%u\n", mcu->board_revision);  in board_revision_show()
182 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in omnia_mcu_base_attrs_visible()  local
187 	    !(mcu->features & OMNIA_FEAT_BOARD_INFO))  in omnia_mcu_base_attrs_visible()
190 	return a->mode;  in omnia_mcu_base_attrs_visible()
209 static void omnia_mcu_print_version_hash(struct omnia_mcu *mcu, bool bootloader)  in omnia_mcu_print_version_hash()  argument
212 	struct device *dev = &mcu->client->dev;  in omnia_mcu_print_version_hash()
216 	err = omnia_get_version_hash(mcu, bootloader, version);  in omnia_mcu_print_version_hash()
218 		dev_err(dev, "Cannot read MCU %s firmware version: %d\n",  in omnia_mcu_print_version_hash()
223 	dev_info(dev, "MCU %s firmware version hash: %s\n", type, version);  in omnia_mcu_print_version_hash()
243 		 "Your board's MCU firmware does not support the %s feature.\n",  in omnia_info_missing_feature()
247 static int omnia_mcu_read_features(struct omnia_mcu *mcu)  in omnia_mcu_read_features()  argument
262 	struct i2c_client *client = mcu->client;  in omnia_mcu_read_features()
263 	struct device *dev = &client->dev;  in omnia_mcu_read_features()
268 	/* status word holds MCU type, which we need below */  in omnia_mcu_read_features()
274 	 * Check whether MCU firmware supports the OMNIA_CMD_GET_FEATURES  in omnia_mcu_read_features()
278 		/* try read 32-bit features */  in omnia_mcu_read_features()
280 					 &mcu->features);  in omnia_mcu_read_features()
282 			/* try read 16-bit features */  in omnia_mcu_read_features()
290 			mcu->features = features16;  in omnia_mcu_read_features()
292 			if (mcu->features & OMNIA_FEAT_FROM_BIT_16_INVALID)  in omnia_mcu_read_features()
293 				mcu->features &= GENMASK(15, 0);  in omnia_mcu_read_features()
297 			 "Your board's MCU firmware does not support feature reading.\n");  in omnia_mcu_read_features()
301 	mcu->type = omnia_status_to_mcu_type(status);  in omnia_mcu_read_features()
302 	dev_info(dev, "MCU type %s%s\n", mcu->type,  in omnia_mcu_read_features()
303 		 (mcu->features & OMNIA_FEAT_PERIPH_MCU) ?  in omnia_mcu_read_features()
306 	omnia_mcu_print_version_hash(mcu, true);  in omnia_mcu_read_features()
308 	if (mcu->features & OMNIA_FEAT_BOOTLOADER)  in omnia_mcu_read_features()
310 			 "MCU is running bootloader firmware. Was firmware upgrade interrupted?\n");  in omnia_mcu_read_features()
312 		omnia_mcu_print_version_hash(mcu, false);  in omnia_mcu_read_features()
315 		if (mcu->features & features[i].mask)  in omnia_mcu_read_features()
324 			 "Consider upgrading MCU firmware with the omnia-mcutool utility.\n");  in omnia_mcu_read_features()
329 static int omnia_mcu_read_board_info(struct omnia_mcu *mcu)  in omnia_mcu_read_board_info()  argument
334 	err = omnia_cmd_read(mcu->client, OMNIA_CMD_BOARD_INFO_GET, reply,  in omnia_mcu_read_board_info()
340 		return -EIO;  in omnia_mcu_read_board_info()
342 	mcu->board_serial_number = get_unaligned_le64(&reply[1]);  in omnia_mcu_read_board_info()
344 	/* we can't use ether_addr_copy() because reply is not u16-aligned */  in omnia_mcu_read_board_info()
345 	memcpy(mcu->board_first_mac, &reply[9], sizeof(mcu->board_first_mac));  in omnia_mcu_read_board_info()
347 	mcu->board_revision = reply[15];  in omnia_mcu_read_board_info()
354 	struct device *dev = &client->dev;  in omnia_mcu_probe()
355 	struct omnia_mcu *mcu;  in omnia_mcu_probe()  local
358 	if (!client->irq)  in omnia_mcu_probe()
359 		return dev_err_probe(dev, -EINVAL, "IRQ resource not found\n");  in omnia_mcu_probe()
361 	mcu = devm_kzalloc(dev, sizeof(*mcu), GFP_KERNEL);  in omnia_mcu_probe()
362 	if (!mcu)  in omnia_mcu_probe()
363 		return -ENOMEM;  in omnia_mcu_probe()
365 	mcu->client = client;  in omnia_mcu_probe()
366 	i2c_set_clientdata(client, mcu);  in omnia_mcu_probe()
368 	err = omnia_mcu_read_features(mcu);  in omnia_mcu_probe()
371 				     "Cannot determine MCU supported features\n");  in omnia_mcu_probe()
373 	if (mcu->features & OMNIA_FEAT_BOARD_INFO) {  in omnia_mcu_probe()
374 		err = omnia_mcu_read_board_info(mcu);  in omnia_mcu_probe()
380 	err = omnia_mcu_register_sys_off_and_wakeup(mcu);  in omnia_mcu_probe()
384 	err = omnia_mcu_register_watchdog(mcu);  in omnia_mcu_probe()
388 	err = omnia_mcu_register_gpiochip(mcu);  in omnia_mcu_probe()
392 	return omnia_mcu_register_trng(mcu);  in omnia_mcu_probe()
396 	{ .compatible = "cznic,turris-omnia-mcu" },
403 		.name	= "turris-omnia-mcu",
411 MODULE_DESCRIPTION("CZ.NIC's Turris Omnia MCU");