1 // SPDX-License-Identifier: GPL-2.0+
6  *  Author: Wei-Ning Huang <wnhuang@google.com>
18 #include <linux/input/vivaldi-fmap.h>
28 #include "hid-ids.h"
29 #include "hid-vivaldi-common.h"
32  * C(hrome)B(ase)A(ttached)S(witch) - switch exported by Chrome EC and reporting
33  * state of the "Whiskers" base - attached or detached. Whiskers USB device also
34  * reports position of the keyboard - folded or not. Combining base state and
35  * position allows us to generate proper "Tablet mode" events.
66 		return -ENOMEM;  in cbas_ec_query_base()
68 	msg->command = EC_CMD_MKBP_INFO;  in cbas_ec_query_base()
69 	msg->version = 1;  in cbas_ec_query_base()
70 	msg->outsize = sizeof(*params);  in cbas_ec_query_base()
71 	msg->insize = sizeof(u32);  in cbas_ec_query_base()
72 	params = (struct ec_params_mkbp_info *)msg->data;  in cbas_ec_query_base()
73 	params->info_type = get_state ?  in cbas_ec_query_base()
75 	params->event_type = EC_MKBP_EVENT_SWITCH;  in cbas_ec_query_base()
80 			dev_warn(ec_dev->dev, "wrong result size: %d != %zu\n",  in cbas_ec_query_base()
82 			ret = -EPROTO;  in cbas_ec_query_base()
84 			*state = cbas_parse_base_state(msg->data);  in cbas_ec_query_base()
102 	if (ec->event_data.event_type == EC_MKBP_EVENT_SWITCH) {  in cbas_ec_notify()
104 					&ec->event_data.data.switches);  in cbas_ec_notify()
139 	struct cros_ec_device *ec = dev_get_drvdata(dev->parent);  in cbas_ec_resume()
180 	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);  in __cbas_ec_probe()
190 		return -ENXIO;  in __cbas_ec_probe()
192 	input = devm_input_allocate_device(&pdev->dev);  in __cbas_ec_probe()
194 		return -ENOMEM;  in __cbas_ec_probe()
196 	input->name = "Whiskers Tablet Mode Switch";  in __cbas_ec_probe()
197 	input->id.bustype = BUS_HOST;  in __cbas_ec_probe()
203 		dev_err(&pdev->dev, "cannot register input device: %d\n",  in __cbas_ec_probe()
211 		dev_err(&pdev->dev, "cannot query base state: %d\n", error);  in __cbas_ec_probe()
218 	dev_dbg(&pdev->dev, "%s: base: %d, folded: %d\n", __func__,  in __cbas_ec_probe()
226 	cbas_ec.dev = &pdev->dev;  in __cbas_ec_probe()
228 	error = blocking_notifier_chain_register(&ec->event_notifier,  in __cbas_ec_probe()
231 		dev_err(&pdev->dev, "cannot register notifier: %d\n", error);  in __cbas_ec_probe()
236 	device_init_wakeup(&pdev->dev, true);  in __cbas_ec_probe()
247 		retval = -EBUSY;  in cbas_ec_probe()
260 	struct cros_ec_device *ec = dev_get_drvdata(pdev->dev.parent);  in cbas_ec_remove()
264 	blocking_notifier_chain_unregister(&ec->event_notifier,  in cbas_ec_remove()
280 	{ .compatible = "google,cros-cbas" },
313 	led->buf[0] = 0;  in hammer_kbd_brightness_set_blocking()
314 	led->buf[1] = br;  in hammer_kbd_brightness_set_blocking()
317 	 * Request USB HID device to be in Full On mode, so that sending  in hammer_kbd_brightness_set_blocking()
320 	ret = hid_hw_power(led->hdev, PM_HINT_FULLON);  in hammer_kbd_brightness_set_blocking()
322 		hid_err(led->hdev, "failed: device not resumed %d\n", ret);  in hammer_kbd_brightness_set_blocking()
326 	ret = hid_hw_output_report(led->hdev, led->buf, sizeof(led->buf));  in hammer_kbd_brightness_set_blocking()
327 	if (ret == -ENOSYS)  in hammer_kbd_brightness_set_blocking()
328 		ret = hid_hw_raw_request(led->hdev, 0, led->buf,  in hammer_kbd_brightness_set_blocking()
329 					 sizeof(led->buf),  in hammer_kbd_brightness_set_blocking()
333 		hid_err(led->hdev, "failed to set keyboard backlight: %d\n",  in hammer_kbd_brightness_set_blocking()
336 	/* Request USB HID device back to Normal Mode. */  in hammer_kbd_brightness_set_blocking()
337 	hid_hw_power(led->hdev, PM_HINT_NORMAL);  in hammer_kbd_brightness_set_blocking()
346 	kbd_backlight = devm_kzalloc(&hdev->dev, sizeof(*kbd_backlight),  in hammer_register_leds()
349 		return -ENOMEM;  in hammer_register_leds()
351 	kbd_backlight->hdev = hdev;  in hammer_register_leds()
352 	kbd_backlight->cdev.name = "hammer::kbd_backlight";  in hammer_register_leds()
353 	kbd_backlight->cdev.max_brightness = MAX_BRIGHTNESS;  in hammer_register_leds()
354 	kbd_backlight->cdev.brightness_set_blocking =  in hammer_register_leds()
356 	kbd_backlight->cdev.flags = LED_HW_PLUGGABLE;  in hammer_register_leds()
359 	hammer_kbd_brightness_set_blocking(&kbd_backlight->cdev, 0);  in hammer_register_leds()
361 	return devm_led_classdev_register(&hdev->dev, &kbd_backlight->cdev);  in hammer_register_leds()
376 	if (usage->hid == HID_USAGE_KBD_FOLDED) {  in hammer_input_mapping()
380 		 * separate input device for tablet switch mode.  in hammer_input_mapping()
382 		return -1;  in hammer_input_mapping()
414 	if (usage->hid == HID_USAGE_KBD_FOLDED) {  in hammer_event()
425 	struct hid_report_enum *re = &hdev->report_enum[report_type];  in hammer_has_usage()
429 	list_for_each_entry(report, &re->report_list, list) {  in hammer_has_usage()
430 		if (report->application != application)  in hammer_has_usage()
433 		for (i = 0; i < report->maxfield; i++) {  in hammer_has_usage()
434 			struct hid_field *field = report->field[i];  in hammer_has_usage()
436 			for (j = 0; j < field->maxusage; j++)  in hammer_has_usage()
437 				if (field->usage[j].hid == usage)  in hammer_has_usage()
464 	report = hdev->report_enum[HID_INPUT_REPORT].report_id_hash[0x0];  in hammer_get_folded_state()
466 	if (!report || report->maxfield < 1)  in hammer_get_folded_state()
475 	rlen = hid_hw_raw_request(hdev, report->id, buf, len, report->type, HID_REQ_GET_REPORT);  in hammer_get_folded_state()
482 	for (a = 0; a < report->maxfield; a++) {  in hammer_get_folded_state()
483 		struct hid_field *field = report->field[a];  in hammer_get_folded_state()
485 		if (field->usage->hid == HID_USAGE_KBD_FOLDED) {  in hammer_get_folded_state()
487 					field->report_offset, field->report_size);  in hammer_get_folded_state()
509 	vdata = devm_kzalloc(&hdev->dev, sizeof(*vdata), GFP_KERNEL);  in hammer_probe()
511 		return -ENOMEM;  in hammer_probe()
523 	error = devm_add_action(&hdev->dev, hammer_stop, hdev);  in hammer_probe()
528 	 * We always want to poll for, and handle tablet mode events from  in hammer_probe()
530 	 * device. This also prevents the hid core from dropping early tablet  in hammer_probe()
531 	 * mode events from the device.  in hammer_probe()
534 		hdev->quirks |= HID_QUIRK_ALWAYS_POLL;  in hammer_probe()
563 		 * keyboard we should not stay in clamshell mode.  in hammer_remove()
568 		 * resulting in devices being stuck in clamshell mode.  in hammer_remove()