1 // SPDX-License-Identifier: GPL-2.0-or-later
108 	rev->major = ret;  in ziirave_wdt_revision()
114 	rev->minor = ret;  in ziirave_wdt_revision()
121 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_wdt_set_state()
138 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_wdt_ping()
147 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_wdt_set_timeout()
152 		wdd->timeout = timeout;  in ziirave_wdt_set_timeout()
159 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_wdt_get_timeleft()
171 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_firm_read_ack()
176 		dev_err(&client->dev, "Failed to read status byte\n");  in ziirave_firm_read_ack()
180 	return ret == ZIIRAVE_FIRM_DOWNLOAD_ACK ? 0 : -EIO;  in ziirave_firm_read_ack()
185 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_firm_set_read_addr()
203  * ziirave_firm_write_pkt() - Build and write a firmware packet
218 	struct i2c_client *client = to_i2c_client(wdd->parent);  in __ziirave_firm_write_pkt()
224 		dev_err(&client->dev, "Firmware packet too long (%d)\n",  in __ziirave_firm_write_pkt()
226 		return -EMSGSIZE;  in __ziirave_firm_write_pkt()
245 	memset(packet + 3 + len, 0, ZIIRAVE_FIRM_PKT_DATA_SIZE - len);  in __ziirave_firm_write_pkt()
250 	packet[ZIIRAVE_FIRM_PKT_TOTAL_SIZE - 1] = checksum;  in __ziirave_firm_write_pkt()
255 		dev_err(&client->dev,  in __ziirave_firm_write_pkt()
262 		dev_err(&client->dev,  in __ziirave_firm_write_pkt()
272 	const u8 max_write_len = ZIIRAVE_FIRM_PAGE_SIZE -  in ziirave_firm_write_pkt()
273 		(addr - ALIGN_DOWN(addr, ZIIRAVE_FIRM_PAGE_SIZE));  in ziirave_firm_write_pkt()
287 		len  -= max_write_len;  in ziirave_firm_write_pkt()
296 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_firm_verify()
301 	for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {  in ziirave_firm_verify()
302 		const u16 len = be16_to_cpu(rec->len);  in ziirave_firm_verify()
303 		const u32 addr = be32_to_cpu(rec->addr);  in ziirave_firm_verify()
310 			dev_err(&client->dev,  in ziirave_firm_verify()
320 				dev_err(&client->dev,  in ziirave_firm_verify()
327 		if (memcmp(data, rec->data, len)) {  in ziirave_firm_verify()
328 			dev_err(&client->dev,  in ziirave_firm_verify()
330 			return -EINVAL;  in ziirave_firm_verify()
340 	struct i2c_client *client = to_i2c_client(wdd->parent);  in ziirave_firm_upload()
348 		dev_err(&client->dev, "Failed to jump to bootloader\n");  in ziirave_firm_upload()
356 		dev_err(&client->dev, "Failed to start download\n");  in ziirave_firm_upload()
362 		dev_err(&client->dev, "No ACK for start download\n");  in ziirave_firm_upload()
368 	for (rec = (void *)fw->data; rec; rec = ihex_next_binrec(rec)) {  in ziirave_firm_upload()
369 		ret = ziirave_firm_write_pkt(wdd, be32_to_cpu(rec->addr),  in ziirave_firm_upload()
370 					     rec->data, be16_to_cpu(rec->len));  in ziirave_firm_upload()
381 		dev_err(&client->dev, "Failed to send EMPTY packet: %d\n", ret);  in ziirave_firm_upload()
391 		dev_err(&client->dev,  in ziirave_firm_upload()
399 		dev_err(&client->dev,  in ziirave_firm_upload()
409 		dev_err(&client->dev,  in ziirave_firm_upload()
421 	.identity = "RAVE Switch Watchdog",
437 	struct i2c_client *client = to_i2c_client(dev->parent);  in ziirave_wdt_sysfs_show_firm()
441 	ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_firm()
446 			 w_priv->firmware_rev.major,  in ziirave_wdt_sysfs_show_firm()
447 			 w_priv->firmware_rev.minor);  in ziirave_wdt_sysfs_show_firm()
449 	mutex_unlock(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_firm()
461 	struct i2c_client *client = to_i2c_client(dev->parent);  in ziirave_wdt_sysfs_show_boot()
465 	ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_boot()
470 			 w_priv->bootloader_rev.major,  in ziirave_wdt_sysfs_show_boot()
471 			 w_priv->bootloader_rev.minor);  in ziirave_wdt_sysfs_show_boot()
473 	mutex_unlock(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_boot()
485 	struct i2c_client *client = to_i2c_client(dev->parent);  in ziirave_wdt_sysfs_show_reason()
489 	ret = mutex_lock_interruptible(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_reason()
493 	ret = sysfs_emit(buf, "%s\n", ziirave_reasons[w_priv->reset_reason]);  in ziirave_wdt_sysfs_show_reason()
495 	mutex_unlock(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_show_reason()
507 	struct i2c_client *client = to_i2c_client(dev->parent);  in ziirave_wdt_sysfs_store_firm()
514 		dev_err(&client->dev, "Failed to request ihex firmware\n");  in ziirave_wdt_sysfs_store_firm()
518 	err = mutex_lock_interruptible(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_store_firm()
522 	err = ziirave_firm_upload(&w_priv->wdd, fw);  in ziirave_wdt_sysfs_store_firm()
524 		dev_err(&client->dev, "The firmware update failed: %d\n", err);  in ziirave_wdt_sysfs_store_firm()
529 	err = ziirave_wdt_revision(client, &w_priv->firmware_rev,  in ziirave_wdt_sysfs_store_firm()
532 		dev_err(&client->dev, "Failed to read firmware version: %d\n",  in ziirave_wdt_sysfs_store_firm()
537 	dev_info(&client->dev,  in ziirave_wdt_sysfs_store_firm()
539 		 w_priv->firmware_rev.major, w_priv->firmware_rev.minor);  in ziirave_wdt_sysfs_store_firm()
542 	err = ziirave_wdt_set_timeout(&w_priv->wdd, w_priv->wdd.timeout);  in ziirave_wdt_sysfs_store_firm()
544 		dev_err(&client->dev, "Failed to set timeout: %d\n", err);  in ziirave_wdt_sysfs_store_firm()
547 	mutex_unlock(&w_priv->sysfs_mutex);  in ziirave_wdt_sysfs_store_firm()
573 		if (!client->dev.of_node)  in ziirave_wdt_init_duration()
574 			ret = -ENODEV;  in ziirave_wdt_init_duration()
576 			ret = of_property_read_u32(client->dev.of_node,  in ziirave_wdt_init_duration()
577 						   "reset-duration-ms",  in ziirave_wdt_init_duration()
580 			dev_info(&client->dev,  in ziirave_wdt_init_duration()
587 		return -EINVAL;  in ziirave_wdt_init_duration()
589 	dev_info(&client->dev, "Setting reset duration to %dms",  in ziirave_wdt_init_duration()
602 	if (!i2c_check_functionality(client->adapter,  in ziirave_wdt_probe()
606 		return -ENODEV;  in ziirave_wdt_probe()
608 	w_priv = devm_kzalloc(&client->dev, sizeof(*w_priv), GFP_KERNEL);  in ziirave_wdt_probe()
610 		return -ENOMEM;  in ziirave_wdt_probe()
612 	mutex_init(&w_priv->sysfs_mutex);  in ziirave_wdt_probe()
614 	w_priv->wdd.info = &ziirave_wdt_info;  in ziirave_wdt_probe()
615 	w_priv->wdd.ops = &ziirave_wdt_ops;  in ziirave_wdt_probe()
616 	w_priv->wdd.min_timeout = ZIIRAVE_TIMEOUT_MIN;  in ziirave_wdt_probe()
617 	w_priv->wdd.max_timeout = ZIIRAVE_TIMEOUT_MAX;  in ziirave_wdt_probe()
618 	w_priv->wdd.parent = &client->dev;  in ziirave_wdt_probe()
619 	w_priv->wdd.groups = ziirave_wdt_groups;  in ziirave_wdt_probe()
621 	watchdog_init_timeout(&w_priv->wdd, wdt_timeout, &client->dev);  in ziirave_wdt_probe()
628 	if (w_priv->wdd.timeout == 0) {  in ziirave_wdt_probe()
631 			dev_err(&client->dev, "Failed to read timeout\n");  in ziirave_wdt_probe()
639 		w_priv->wdd.timeout = val;  in ziirave_wdt_probe()
642 	ret = ziirave_wdt_set_timeout(&w_priv->wdd, w_priv->wdd.timeout);  in ziirave_wdt_probe()
644 		dev_err(&client->dev, "Failed to set timeout\n");  in ziirave_wdt_probe()
648 	dev_info(&client->dev, "Timeout set to %ds\n", w_priv->wdd.timeout);  in ziirave_wdt_probe()
650 	watchdog_set_nowayout(&w_priv->wdd, nowayout);  in ziirave_wdt_probe()
657 		dev_err(&client->dev, "Failed to read state\n");  in ziirave_wdt_probe()
662 		ziirave_wdt_stop(&w_priv->wdd);  in ziirave_wdt_probe()
666 		dev_err(&client->dev, "Failed to init duration\n");  in ziirave_wdt_probe()
670 	ret = ziirave_wdt_revision(client, &w_priv->firmware_rev,  in ziirave_wdt_probe()
673 		dev_err(&client->dev, "Failed to read firmware version\n");  in ziirave_wdt_probe()
677 	dev_info(&client->dev,  in ziirave_wdt_probe()
679 		 w_priv->firmware_rev.major, w_priv->firmware_rev.minor);  in ziirave_wdt_probe()
681 	ret = ziirave_wdt_revision(client, &w_priv->bootloader_rev,  in ziirave_wdt_probe()
684 		dev_err(&client->dev, "Failed to read bootloader version\n");  in ziirave_wdt_probe()
688 	dev_info(&client->dev,  in ziirave_wdt_probe()
690 		 w_priv->bootloader_rev.major, w_priv->bootloader_rev.minor);  in ziirave_wdt_probe()
692 	w_priv->reset_reason = i2c_smbus_read_byte_data(client,  in ziirave_wdt_probe()
694 	if (w_priv->reset_reason < 0) {  in ziirave_wdt_probe()
695 		dev_err(&client->dev, "Failed to read reset reason\n");  in ziirave_wdt_probe()
696 		return w_priv->reset_reason;  in ziirave_wdt_probe()
699 	if (w_priv->reset_reason >= ARRAY_SIZE(ziirave_reasons) ||  in ziirave_wdt_probe()
700 	    !ziirave_reasons[w_priv->reset_reason]) {  in ziirave_wdt_probe()
701 		dev_err(&client->dev, "Invalid reset reason\n");  in ziirave_wdt_probe()
702 		return -ENODEV;  in ziirave_wdt_probe()
705 	ret = watchdog_register_device(&w_priv->wdd);  in ziirave_wdt_probe()
714 	watchdog_unregister_device(&w_priv->wdd);  in ziirave_wdt_remove()
718 	{ "rave-wdt", 0 },
724 	{ .compatible = "zii,rave-wdt", },
742 MODULE_DESCRIPTION("Zodiac Aerospace RAVE Switch Watchdog Processor Driver");