3  * CZ.NIC's Turris Omnia MCU driver
19 #include <linux/turris-omnia-mcu-interface.h>
20 #include "turris-omnia-mcu.h"
57 static int omnia_get_version_hash(struct omnia_mcu *mcu, bool bootloader,  in omnia_get_version_hash()  argument
64 	err = omnia_cmd_read(mcu->client,  in omnia_get_version_hash()
80 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in fw_version_hash_show()  local
84 	err = omnia_get_version_hash(mcu, bootloader, version);  in fw_version_hash_show()
110 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in fw_features_show()  local
112 	return sysfs_emit(buf, "0x%x\n", mcu->features);  in fw_features_show()
119 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in mcu_type_show()  local
121 	return sysfs_emit(buf, "%s\n", mcu->type);  in mcu_type_show()
143 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in serial_number_show()  local
145 	return sysfs_emit(buf, "%016llX\n", mcu->board_serial_number);  in serial_number_show()
152 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in first_mac_address_show()  local
154 	return sysfs_emit(buf, "%pM\n", mcu->board_first_mac);  in first_mac_address_show()
161 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in board_revision_show()  local
163 	return sysfs_emit(buf, "%u\n", mcu->board_revision);  in board_revision_show()
183 	struct omnia_mcu *mcu = dev_get_drvdata(dev);  in omnia_mcu_base_attrs_visible()  local
188 	    !(mcu->features & OMNIA_FEAT_BOARD_INFO))  in omnia_mcu_base_attrs_visible()
210 static void omnia_mcu_print_version_hash(struct omnia_mcu *mcu, bool bootloader)  in omnia_mcu_print_version_hash()  argument
213 	struct device *dev = &mcu->client->dev;  in omnia_mcu_print_version_hash()
217 	err = omnia_get_version_hash(mcu, bootloader, version);  in omnia_mcu_print_version_hash()
219 		dev_err(dev, "Cannot read MCU %s firmware version: %d\n",  in omnia_mcu_print_version_hash()
224 	dev_info(dev, "MCU %s firmware version hash: %s\n", type, version);  in omnia_mcu_print_version_hash()
244 		 "Your board's MCU firmware does not support the %s feature.\n",  in omnia_info_missing_feature()
248 static int omnia_mcu_read_features(struct omnia_mcu *mcu)  in omnia_mcu_read_features()  argument
265 	struct i2c_client *client = mcu->client;  in omnia_mcu_read_features()
271 	/* status word holds MCU type, which we need below */  in omnia_mcu_read_features()
277 	 * Check whether MCU firmware supports the OMNIA_CMD_GET_FEATURES  in omnia_mcu_read_features()
283 					 &mcu->features);  in omnia_mcu_read_features()
293 			mcu->features = features16;  in omnia_mcu_read_features()
295 			if (mcu->features & OMNIA_FEAT_FROM_BIT_16_INVALID)  in omnia_mcu_read_features()
296 				mcu->features &= GENMASK(15, 0);  in omnia_mcu_read_features()
300 			 "Your board's MCU firmware does not support feature reading.\n");  in omnia_mcu_read_features()
304 	mcu->type = omnia_status_to_mcu_type(status);  in omnia_mcu_read_features()
305 	dev_info(dev, "MCU type %s%s\n", mcu->type,  in omnia_mcu_read_features()
306 		 (mcu->features & OMNIA_FEAT_PERIPH_MCU) ?  in omnia_mcu_read_features()
309 	omnia_mcu_print_version_hash(mcu, true);  in omnia_mcu_read_features()
311 	if (mcu->features & OMNIA_FEAT_BOOTLOADER)  in omnia_mcu_read_features()
313 			 "MCU is running bootloader firmware. Was firmware upgrade interrupted?\n");  in omnia_mcu_read_features()
315 		omnia_mcu_print_version_hash(mcu, false);  in omnia_mcu_read_features()
318 		if (mcu->features & features[i].mask)  in omnia_mcu_read_features()
327 			 "Consider upgrading MCU firmware with the omnia-mcutool utility.\n");  in omnia_mcu_read_features()
332 static int omnia_mcu_read_board_info(struct omnia_mcu *mcu)  in omnia_mcu_read_board_info()  argument
337 	err = omnia_cmd_read(mcu->client, OMNIA_CMD_BOARD_INFO_GET, reply,  in omnia_mcu_read_board_info()
345 	mcu->board_serial_number = get_unaligned_le64(&reply[1]);  in omnia_mcu_read_board_info()
348 	memcpy(mcu->board_first_mac, &reply[9], sizeof(mcu->board_first_mac));  in omnia_mcu_read_board_info()
350 	mcu->board_revision = reply[15];  in omnia_mcu_read_board_info()
358 	struct omnia_mcu *mcu;  in omnia_mcu_probe()  local
364 	mcu = devm_kzalloc(dev, sizeof(*mcu), GFP_KERNEL);  in omnia_mcu_probe()
365 	if (!mcu)  in omnia_mcu_probe()
368 	mcu->client = client;  in omnia_mcu_probe()
369 	i2c_set_clientdata(client, mcu);  in omnia_mcu_probe()
371 	err = omnia_mcu_read_features(mcu);  in omnia_mcu_probe()
374 				     "Cannot determine MCU supported features\n");  in omnia_mcu_probe()
376 	if (mcu->features & OMNIA_FEAT_BOARD_INFO) {  in omnia_mcu_probe()
377 		err = omnia_mcu_read_board_info(mcu);  in omnia_mcu_probe()
383 	err = omnia_mcu_register_sys_off_and_wakeup(mcu);  in omnia_mcu_probe()
387 	err = omnia_mcu_register_watchdog(mcu);  in omnia_mcu_probe()
391 	err = omnia_mcu_register_gpiochip(mcu);  in omnia_mcu_probe()
395 	return omnia_mcu_register_trng(mcu);  in omnia_mcu_probe()
399 	{ .compatible = "cznic,turris-omnia-mcu" },
406 		.name	= "turris-omnia-mcu",
414 MODULE_DESCRIPTION("CZ.NIC's Turris Omnia MCU");