1 // SPDX-License-Identifier: GPL-2.0-only
3  * Elan I2C/SMBus Touchpad driver - SMBus interface
7  * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
10  * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
11  * copyright (c) 2011-2012 Google, Inc.
63 		dev_err(&client->dev, "hello packet length fail: %d\n", len);  in elan_smbus_initialize()
64 		error = len < 0 ? len : -EIO;  in elan_smbus_initialize()
70 		dev_err(&client->dev, "hello packet fail [%*ph]\n",  in elan_smbus_initialize()
72 		return -ENXIO;  in elan_smbus_initialize()
78 		dev_err(&client->dev, "failed to enable touchpad: %d\n", error);  in elan_smbus_initialize()
85 static int elan_smbus_set_mode(struct i2c_client *client, u8 mode)  in elan_smbus_set_mode()  argument
87 	u8 cmd[4] = { 0x00, 0x07, 0x00, mode };  in elan_smbus_set_mode()
103 	return 0; /* A no-op */  in elan_smbus_power_control()
160 		dev_err(&client->dev, "failed to get %s version: %d\n",  in elan_smbus_get_version()
178 		dev_err(&client->dev, "failed to get SM version: %d\n", error);  in elan_smbus_get_sm_version()
196 		dev_err(&client->dev, "failed to get product ID: %d\n", error);  in elan_smbus_get_product_id()
215 		dev_err(&client->dev, "failed to get %s checksum: %d\n",  in elan_smbus_get_checksum()
233 		error = ret < 0 ? ret : -EIO;  in elan_smbus_get_max()
234 		dev_err(&client->dev, "failed to get dimensions: %d\n", error);  in elan_smbus_get_max()
253 		error = ret < 0 ? ret : -EIO;  in elan_smbus_get_resolution()
254 		dev_err(&client->dev, "failed to get resolution: %d\n", error);  in elan_smbus_get_resolution()
274 		error = ret < 0 ? ret : -EIO;  in elan_smbus_get_num_traces()
275 		dev_err(&client->dev, "failed to get trace info: %d\n", error);  in elan_smbus_get_num_traces()
293 				   enum tp_mode *mode)  in elan_smbus_iap_get_mode()  argument
301 		dev_err(&client->dev, "failed to read iap ctrol register: %d\n",  in elan_smbus_iap_get_mode()
307 	dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);  in elan_smbus_iap_get_mode()
309 	*mode = (constant & ETP_SMBUS_IAP_MODE_ON) ? IAP_MODE : MAIN_MODE;  in elan_smbus_iap_get_mode()
320 		dev_err(&client->dev, "cannot reset IC: %d\n", error);  in elan_smbus_iap_reset()
335 		dev_err(&client->dev, "cannot set flash key: %d\n", error);  in elan_smbus_set_flash_key()
345 	struct device *dev = &client->dev;  in elan_smbus_prepare_fw_update()
348 	enum tp_mode mode;  in elan_smbus_prepare_fw_update()  local
353 	/* Get FW in which mode	(IAP_MODE/MAIN_MODE)  */  in elan_smbus_prepare_fw_update()
354 	error = elan_smbus_iap_get_mode(client, &mode);  in elan_smbus_prepare_fw_update()
358 	if (mode == MAIN_MODE) {  in elan_smbus_prepare_fw_update()
369 			return -EIO;  in elan_smbus_prepare_fw_update()
388 			error = len < 0 ? len : -EIO;  in elan_smbus_prepare_fw_update()
397 			return -EIO;  in elan_smbus_prepare_fw_update()
408 	/* Reset IC */  in elan_smbus_prepare_fw_update()
420 	struct device *dev = &client->dev;  in elan_smbus_write_fw_block()
466 		return -EIO;  in elan_smbus_write_fw_block()
478 	 * high-precision packets use that space for coordinates.  in elan_smbus_get_report_features()
496 		dev_err(&client->dev, "failed to read report data: %d\n", len);  in elan_smbus_get_report()
501 		dev_err(&client->dev,  in elan_smbus_get_report()
504 		return -EIO;  in elan_smbus_get_report()