1 // SPDX-License-Identifier: GPL-2.0-only
3  * Raydium touchscreen I2C driver.
5  * Copyright (C) 2012-2014, Raydium Semiconductor Corporation.
11  * Contact Raydium Semiconductor Corporation at www.rad-ic.com
111 	u8 x_res;		/* units/mm */
112 	u8 y_res;		/* units/mm */
115 /* struct raydium_data - represents state of Raydium touchscreen device */
158 	xfer_count -= xfer_start_idx;  in raydium_i2c_xfer()
160 	ret = i2c_transfer(client->adapter, &xfer[xfer_start_idx], xfer_count);  in raydium_i2c_xfer()
164 	return ret < 0 ? ret : -EIO;  in raydium_i2c_xfer()
177 		return -ENOMEM;  in raydium_i2c_send()
200 				.addr = client->addr,  in raydium_i2c_send()
205 				.addr = client->addr,  in raydium_i2c_send()
218 	dev_err(&client->dev, "%s failed: %d\n", __func__, error);  in raydium_i2c_send()
247 				.addr = client->addr,  in raydium_i2c_read()
252 				.addr = client->addr,  in raydium_i2c_read()
257 				.addr = client->addr,  in raydium_i2c_read()
268 		len -= xfer_len;  in raydium_i2c_read()
284 		dev_err(&client->dev, "software reset failed: %d\n", error);  in raydium_i2c_sw_reset()
295 	struct i2c_client *client = ts->client;  in raydium_i2c_query_ts_info()
312 		if (ts->report_data && ts->pkg_size != data_info.pkg_size) {  in raydium_i2c_query_ts_info()
313 			dev_warn(&client->dev,  in raydium_i2c_query_ts_info()
315 				 ts->pkg_size, data_info.pkg_size);  in raydium_i2c_query_ts_info()
317 			ts->pkg_size = data_info.pkg_size;  in raydium_i2c_query_ts_info()
318 			ts->report_size = ts->pkg_size - RM_PACKET_CRC_SIZE;  in raydium_i2c_query_ts_info()
321 		ts->contact_size = data_info.tp_info_size;  in raydium_i2c_query_ts_info()
322 		ts->data_bank_addr = le32_to_cpu(data_info.data_bank_addr);  in raydium_i2c_query_ts_info()
324 		dev_dbg(&client->dev,  in raydium_i2c_query_ts_info()
325 			"data_bank_addr: %#08x, report_size: %d, contact_size: %d\n",  in raydium_i2c_query_ts_info()
326 			ts->data_bank_addr, ts->report_size, ts->contact_size);  in raydium_i2c_query_ts_info()
335 					 &ts->info, sizeof(ts->info));  in raydium_i2c_query_ts_info()
342 	dev_err(&client->dev, "failed to query device parameters: %d\n", error);  in raydium_i2c_query_ts_info()
348 	struct i2c_client *client = ts->client;  in raydium_i2c_check_fw_status()
357 			ts->boot_mode = RAYDIUM_TS_BLDR;  in raydium_i2c_check_fw_status()
359 			ts->boot_mode = RAYDIUM_TS_MAIN;  in raydium_i2c_check_fw_status()
368 	struct i2c_client *client = ts->client;  in raydium_i2c_initialize()
377 			dev_err(&client->dev,  in raydium_i2c_initialize()
382 		if (ts->boot_mode == RAYDIUM_TS_BLDR ||  in raydium_i2c_initialize()
383 		    ts->boot_mode == RAYDIUM_TS_MAIN) {  in raydium_i2c_initialize()
389 		ts->boot_mode = RAYDIUM_TS_BLDR;  in raydium_i2c_initialize()
391 	if (ts->boot_mode == RAYDIUM_TS_BLDR) {  in raydium_i2c_initialize()
392 		ts->info.hw_ver = cpu_to_le32(0xffffffffUL);  in raydium_i2c_initialize()
393 		ts->info.main_ver = 0xff;  in raydium_i2c_initialize()
394 		ts->info.sub_ver = 0xff;  in raydium_i2c_initialize()
432 			dev_err(&client->dev, "%s: invalid target state %d\n",  in raydium_i2c_bl_chk_state()
434 			return -EINVAL;  in raydium_i2c_bl_chk_state()
440 	return -ETIMEDOUT;  in raydium_i2c_bl_chk_state()
451 		dev_err(&client->dev, "WRT obj command failed: %d\n",  in raydium_i2c_write_object()
458 		dev_err(&client->dev, "Ack obj command failed: %d\n", error);  in raydium_i2c_write_object()
464 		dev_err(&client->dev, "BL check state failed: %d\n", error);  in raydium_i2c_write_object()
488 			dev_err(&client->dev,  in raydium_i2c_boot_trigger()
514 			dev_err(&client->dev,  in raydium_i2c_fw_trigger()
532 		dev_err(&client->dev, "check path command failed: %d\n", error);  in raydium_i2c_check_path()
547 		dev_err(&client->dev, "enter bl command failed: %d\n", error);  in raydium_i2c_enter_bl()
563 		dev_err(&client->dev, "leave bl command failed: %d\n", error);  in raydium_i2c_leave_bl()
584 		dev_err(&client->dev, "failed to write checksum: %d\n",  in raydium_i2c_write_checksum()
600 		dev_err(&client->dev, "disable watchdog command failed: %d\n",  in raydium_i2c_disable_watch_dog()
627 				RM_BL_WRT_PKG_SIZE - xfer_len);  in raydium_i2c_fw_write_page()
632 			dev_err(&client->dev,  in raydium_i2c_fw_write_page()
639 		len -= xfer_len;  in raydium_i2c_fw_write_page()
659 	struct i2c_client *client = ts->client;  in raydium_i2c_do_update_firmware()
668 	if (fw->size == 0 || fw->size > RM_MAX_FW_SIZE) {  in raydium_i2c_do_update_firmware()
669 		dev_err(&client->dev, "Invalid firmware length\n");  in raydium_i2c_do_update_firmware()
670 		return -EINVAL;  in raydium_i2c_do_update_firmware()
675 		dev_err(&client->dev, "Unable to access IC %d\n", error);  in raydium_i2c_do_update_firmware()
679 	if (ts->boot_mode == RAYDIUM_TS_MAIN) {  in raydium_i2c_do_update_firmware()
685 					dev_err(&client->dev,  in raydium_i2c_do_update_firmware()
691 				if (ts->boot_mode == RAYDIUM_TS_BLDR)  in raydium_i2c_do_update_firmware()
696 		if (ts->boot_mode == RAYDIUM_TS_MAIN) {  in raydium_i2c_do_update_firmware()
697 			dev_err(&client->dev,  in raydium_i2c_do_update_firmware()
700 			return -EIO;  in raydium_i2c_do_update_firmware()
714 		dev_err(&client->dev, "send boot trigger fail: %d\n", error);  in raydium_i2c_do_update_firmware()
720 	data = fw->data;  in raydium_i2c_do_update_firmware()
721 	data_len = fw->size;  in raydium_i2c_do_update_firmware()
734 		data_len -= len;  in raydium_i2c_do_update_firmware()
739 		dev_err(&client->dev,  in raydium_i2c_do_update_firmware()
744 	dev_dbg(&client->dev, "left boot loader mode\n");  in raydium_i2c_do_update_firmware()
749 		dev_err(&client->dev,  in raydium_i2c_do_update_firmware()
755 	if (ts->boot_mode != RAYDIUM_TS_MAIN) {  in raydium_i2c_do_update_firmware()
756 		dev_err(&client->dev,  in raydium_i2c_do_update_firmware()
759 		return -EINVAL;  in raydium_i2c_do_update_firmware()
764 		dev_err(&client->dev, "failed to trigger fw: %d\n", error);  in raydium_i2c_do_update_firmware()
768 	fw_checksum = raydium_calc_chksum(fw->data, fw->size);  in raydium_i2c_do_update_firmware()
770 	error = raydium_i2c_write_checksum(client, fw->size, fw_checksum);  in raydium_i2c_do_update_firmware()
779 	struct i2c_client *client = ts->client;  in raydium_i2c_fw_update()
784 	fw_file = kasprintf(GFP_KERNEL, "raydium_%#04x.fw",  in raydium_i2c_fw_update()
785 			    le32_to_cpu(ts->info.hw_ver));  in raydium_i2c_fw_update()
787 		return -ENOMEM;  in raydium_i2c_fw_update()
789 	dev_dbg(&client->dev, "firmware name: %s\n", fw_file);  in raydium_i2c_fw_update()
791 	error = request_firmware(&fw, fw_file, &client->dev);  in raydium_i2c_fw_update()
793 		dev_err(&client->dev, "Unable to open firmware %s\n", fw_file);  in raydium_i2c_fw_update()
797 	disable_irq(client->irq);  in raydium_i2c_fw_update()
801 		dev_err(&client->dev, "firmware update failed: %d\n", error);  in raydium_i2c_fw_update()
802 		ts->boot_mode = RAYDIUM_TS_BLDR;  in raydium_i2c_fw_update()
808 		dev_err(&client->dev,  in raydium_i2c_fw_update()
811 		ts->boot_mode = RAYDIUM_TS_BLDR;  in raydium_i2c_fw_update()
815 	ts->boot_mode = RAYDIUM_TS_MAIN;  in raydium_i2c_fw_update()
818 	enable_irq(client->irq);  in raydium_i2c_fw_update()
833 	for (i = 0; i < ts->report_size / ts->contact_size; i++) {  in raydium_mt_event()
834 		u8 *contact = &ts->report_data[ts->contact_size * i];  in raydium_mt_event()
838 		input_mt_slot(ts->input, i);  in raydium_mt_event()
839 		input_mt_report_slot_state(ts->input, MT_TOOL_FINGER, state);  in raydium_mt_event()
844 		input_report_abs(ts->input, ABS_MT_POSITION_X,  in raydium_mt_event()
846 		input_report_abs(ts->input, ABS_MT_POSITION_Y,  in raydium_mt_event()
848 		input_report_abs(ts->input, ABS_MT_PRESSURE,  in raydium_mt_event()
854 		input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR, max(wx, wy));  in raydium_mt_event()
855 		input_report_abs(ts->input, ABS_MT_TOUCH_MINOR, min(wx, wy));  in raydium_mt_event()
858 	input_mt_sync_frame(ts->input);  in raydium_mt_event()
859 	input_sync(ts->input);  in raydium_mt_event()
869 	if (ts->boot_mode != RAYDIUM_TS_MAIN)  in raydium_i2c_irq()
872 	error = raydium_i2c_read(ts->client, ts->data_bank_addr,  in raydium_i2c_irq()
873 				 ts->report_data, ts->pkg_size);  in raydium_i2c_irq()
877 	fw_crc = get_unaligned_le16(&ts->report_data[ts->report_size]);  in raydium_i2c_irq()
878 	calc_crc = raydium_calc_chksum(ts->report_data, ts->report_size);  in raydium_i2c_irq()
880 		dev_warn(&ts->client->dev,  in raydium_i2c_irq()
881 			 "%s: invalid packet crc %#04x vs %#04x\n",  in raydium_i2c_irq()
898 	return sprintf(buf, "%d.%d\n", ts->info.main_ver, ts->info.sub_ver);  in raydium_i2c_fw_ver_show()
907 	return sprintf(buf, "%#04x\n", le32_to_cpu(ts->info.hw_ver));  in raydium_i2c_hw_ver_show()
918 		       ts->boot_mode == RAYDIUM_TS_MAIN ?  in raydium_i2c_boot_mode_show()
930 	error = mutex_lock_interruptible(&ts->sysfs_mutex);  in raydium_i2c_update_fw_store()
936 	mutex_unlock(&ts->sysfs_mutex);  in raydium_i2c_update_fw_store()
950 	error = mutex_lock_interruptible(&ts->sysfs_mutex);  in raydium_i2c_calibrate_store()
957 		dev_err(&client->dev, "calibrate command failed: %d\n", error);  in raydium_i2c_calibrate_store()
959 	mutex_unlock(&ts->sysfs_mutex);  in raydium_i2c_calibrate_store()
986 	if (!ts->reset_gpio)  in raydium_i2c_power_on()
989 	gpiod_set_value_cansleep(ts->reset_gpio, 1);  in raydium_i2c_power_on()
991 	error = regulator_enable(ts->avdd);  in raydium_i2c_power_on()
993 		dev_err(&ts->client->dev,  in raydium_i2c_power_on()
998 	error = regulator_enable(ts->vccio);  in raydium_i2c_power_on()
1000 		regulator_disable(ts->avdd);  in raydium_i2c_power_on()
1001 		dev_err(&ts->client->dev,  in raydium_i2c_power_on()
1009 	gpiod_set_value_cansleep(ts->reset_gpio, 0);  in raydium_i2c_power_on()
1023 	if (ts->reset_gpio) {  in raydium_i2c_power_off()
1024 		gpiod_set_value_cansleep(ts->reset_gpio, 1);  in raydium_i2c_power_off()
1025 		regulator_disable(ts->vccio);  in raydium_i2c_power_off()
1026 		regulator_disable(ts->avdd);  in raydium_i2c_power_off()
1037 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {  in raydium_i2c_probe()
1038 		dev_err(&client->dev,  in raydium_i2c_probe()
1040 		return -ENXIO;  in raydium_i2c_probe()
1043 	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);  in raydium_i2c_probe()
1045 		return -ENOMEM;  in raydium_i2c_probe()
1047 	mutex_init(&ts->sysfs_mutex);  in raydium_i2c_probe()
1049 	ts->client = client;  in raydium_i2c_probe()
1052 	ts->avdd = devm_regulator_get(&client->dev, "avdd");  in raydium_i2c_probe()
1053 	if (IS_ERR(ts->avdd)) {  in raydium_i2c_probe()
1054 		error = PTR_ERR(ts->avdd);  in raydium_i2c_probe()
1055 		if (error != -EPROBE_DEFER)  in raydium_i2c_probe()
1056 			dev_err(&client->dev,  in raydium_i2c_probe()
1061 	ts->vccio = devm_regulator_get(&client->dev, "vccio");  in raydium_i2c_probe()
1062 	if (IS_ERR(ts->vccio)) {  in raydium_i2c_probe()
1063 		error = PTR_ERR(ts->vccio);  in raydium_i2c_probe()
1064 		if (error != -EPROBE_DEFER)  in raydium_i2c_probe()
1065 			dev_err(&client->dev,  in raydium_i2c_probe()
1070 	ts->reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",  in raydium_i2c_probe()
1072 	if (IS_ERR(ts->reset_gpio)) {  in raydium_i2c_probe()
1073 		error = PTR_ERR(ts->reset_gpio);  in raydium_i2c_probe()
1074 		if (error != -EPROBE_DEFER)  in raydium_i2c_probe()
1075 			dev_err(&client->dev,  in raydium_i2c_probe()
1084 	error = devm_add_action(&client->dev, raydium_i2c_power_off, ts);  in raydium_i2c_probe()
1086 		dev_err(&client->dev,  in raydium_i2c_probe()
1093 	if (i2c_smbus_xfer(client->adapter, client->addr, 0,  in raydium_i2c_probe()
1095 		dev_err(&client->dev, "nothing at this address\n");  in raydium_i2c_probe()
1096 		return -ENXIO;  in raydium_i2c_probe()
1101 		dev_err(&client->dev, "failed to initialize: %d\n", error);  in raydium_i2c_probe()
1105 	ts->report_data = devm_kmalloc(&client->dev,  in raydium_i2c_probe()
1106 				       ts->pkg_size, GFP_KERNEL);  in raydium_i2c_probe()
1107 	if (!ts->report_data)  in raydium_i2c_probe()
1108 		return -ENOMEM;  in raydium_i2c_probe()
1110 	ts->input = devm_input_allocate_device(&client->dev);  in raydium_i2c_probe()
1111 	if (!ts->input) {  in raydium_i2c_probe()
1112 		dev_err(&client->dev, "Failed to allocate input device\n");  in raydium_i2c_probe()
1113 		return -ENOMEM;  in raydium_i2c_probe()
1116 	ts->input->name = "Raydium Touchscreen";  in raydium_i2c_probe()
1117 	ts->input->id.bustype = BUS_I2C;  in raydium_i2c_probe()
1119 	input_set_abs_params(ts->input, ABS_MT_POSITION_X,  in raydium_i2c_probe()
1120 			     0, le16_to_cpu(ts->info.x_max), 0, 0);  in raydium_i2c_probe()
1121 	input_set_abs_params(ts->input, ABS_MT_POSITION_Y,  in raydium_i2c_probe()
1122 			     0, le16_to_cpu(ts->info.y_max), 0, 0);  in raydium_i2c_probe()
1123 	input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->info.x_res);  in raydium_i2c_probe()
1124 	input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->info.y_res);  in raydium_i2c_probe()
1126 	input_set_abs_params(ts->input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);  in raydium_i2c_probe()
1127 	input_set_abs_params(ts->input, ABS_MT_PRESSURE, 0, 255, 0, 0);  in raydium_i2c_probe()
1129 	error = input_mt_init_slots(ts->input, RM_MAX_TOUCH_NUM,  in raydium_i2c_probe()
1132 		dev_err(&client->dev,  in raydium_i2c_probe()
1137 	error = input_register_device(ts->input);  in raydium_i2c_probe()
1139 		dev_err(&client->dev,  in raydium_i2c_probe()
1144 	error = devm_request_threaded_irq(&client->dev, client->irq,  in raydium_i2c_probe()
1146 					  IRQF_ONESHOT, client->name, ts);  in raydium_i2c_probe()
1148 		dev_err(&client->dev, "Failed to register interrupt\n");  in raydium_i2c_probe()
1152 	error = devm_device_add_group(&client->dev,  in raydium_i2c_probe()
1155 		dev_err(&client->dev, "failed to create sysfs attributes: %d\n",  in raydium_i2c_probe()
1171 		dev_err(&client->dev,  in raydium_enter_sleep()
1181 	if (ts->boot_mode != RAYDIUM_TS_MAIN)  in raydium_i2c_suspend()
1182 		return -EBUSY;  in raydium_i2c_suspend()
1184 	disable_irq(client->irq);  in raydium_i2c_suspend()
1189 		ts->wake_irq_enabled = (enable_irq_wake(client->irq) == 0);  in raydium_i2c_suspend()
1203 		if (ts->wake_irq_enabled)  in raydium_i2c_resume()
1204 			disable_irq_wake(client->irq);  in raydium_i2c_resume()
1211 	enable_irq(client->irq);  in raydium_i2c_resume()
1255 MODULE_DESCRIPTION("Raydium I2c Touchscreen driver");