1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * ON Semiconductor LC824206XA Micro USB Switch driver
8  * (ENA2222-D.PDF), but no full datasheet. So there is no documentation
11  * This driver is based on the register info from the extcon-fsa9285.c driver,
22 #include <linux/extcon-provider.h>
57 /* 5 bits? ADC 0x10 GND, 0x1a-0x1f ACA, 0x1f float */
82  * auto-reset to 0, so these must be set to 0 manually after clearing.
139 	ret = i2c_smbus_read_byte_data(data->client, reg);  in lc824206xa_read_reg()
141 		dev_err(&data->client->dev, "Error %d reading reg 0x%02x\n", ret, reg);  in lc824206xa_read_reg()
150 	ret = i2c_smbus_write_byte_data(data->client, reg, val);  in lc824206xa_write_reg()
152 		dev_err(&data->client->dev, "Error %d writing reg 0x%02x\n", ret, reg);  in lc824206xa_write_reg()
176 	if (data->vbus_boost_enabled == enable)  in lc824206xa_set_vbus_boost()
180 		ret = regulator_enable(data->vbus_boost);  in lc824206xa_set_vbus_boost()
182 		ret = regulator_disable(data->vbus_boost);  in lc824206xa_set_vbus_boost()
185 		data->vbus_boost_enabled = enable;  in lc824206xa_set_vbus_boost()
187 		dev_err(&data->client->dev, "Error updating Vbus boost regulator: %d\n", ret);  in lc824206xa_set_vbus_boost()
198 	dev_dbg(&data->client->dev, "charger type 0x%02x\n", charger_type);  in lc824206xa_charger_detect()
202 		data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in lc824206xa_charger_detect()
203 		/* Treat as SDP */  in lc824206xa_charger_detect()
204 		data->cable = EXTCON_CHG_USB_SDP;  in lc824206xa_charger_detect()
205 		data->switch_control = SWITCH_USB_DEVICE;  in lc824206xa_charger_detect()
208 		data->usb_type = POWER_SUPPLY_USB_TYPE_SDP;  in lc824206xa_charger_detect()
209 		data->cable = EXTCON_CHG_USB_SDP;  in lc824206xa_charger_detect()
210 		data->switch_control = SWITCH_USB_DEVICE;  in lc824206xa_charger_detect()
220 			data->usb_type = POWER_SUPPLY_USB_TYPE_CDP;  in lc824206xa_charger_detect()
221 			data->cable = EXTCON_CHG_USB_CDP;  in lc824206xa_charger_detect()
227 		data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;  in lc824206xa_charger_detect()
228 		data->cable = EXTCON_CHG_USB_DCP;  in lc824206xa_charger_detect()
229 		if (data->fastcharge_over_miclr)  in lc824206xa_charger_detect()
230 			data->switch_control = SWITCH_STEREO_MIC;  in lc824206xa_charger_detect()
232 			data->switch_control = SWITCH_DISCONNECTED;  in lc824206xa_charger_detect()
235 		data->usb_type = POWER_SUPPLY_USB_TYPE_DCP;  in lc824206xa_charger_detect()
236 		data->cable = EXTCON_CHG_USB_DCP;  in lc824206xa_charger_detect()
237 		data->switch_control = SWITCH_DISCONNECTED;  in lc824206xa_charger_detect()
240 		dev_warn(&data->client->dev, "Unknown charger type: 0x%02x\n", charger_type);  in lc824206xa_charger_detect()
255 	dev_dbg(&data->client->dev, "status 0x%02x\n", status);  in lc824206xa_work()
257 	data->vbus_ok = (status & (STATUS_VBUS_PRESENT | STATUS_OVP)) == STATUS_VBUS_PRESENT;  in lc824206xa_work()
266 		dev_dbg(&data->client->dev, "Unknown status 0x%02x\n", status);  in lc824206xa_work()
270 		dev_dbg(&data->client->dev, "RID 0x%02x\n", id);  in lc824206xa_work()
282 			dev_warn(&data->client->dev, "Unknown RID 0x%02x\n", id);  in lc824206xa_work()
289 	    data->vbus_ok && !data->vbus_boost_enabled) {  in lc824206xa_work()
290 …dev_info(&data->client->dev, "Out of spec USB host adapter with Vbus present, not enabling 5V outp…  in lc824206xa_work()
296 		data->usb_type = POWER_SUPPLY_USB_TYPE_ACA;  in lc824206xa_work()
297 		data->cable = EXTCON_CHG_USB_ACA;  in lc824206xa_work()
298 		data->switch_control = SWITCH_USB_HOST;  in lc824206xa_work()
301 		data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in lc824206xa_work()
302 		data->cable = EXTCON_USB_HOST;  in lc824206xa_work()
303 		data->switch_control = SWITCH_USB_HOST;  in lc824206xa_work()
308 		if (data->fastcharge_over_miclr &&  in lc824206xa_work()
309 		    data->switch_control == SWITCH_STEREO_MIC &&  in lc824206xa_work()
311 			data->cable = EXTCON_CHG_USB_FAST;  in lc824206xa_work()
315 		if (data->vbus_ok) {  in lc824206xa_work()
318 			data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in lc824206xa_work()
319 			data->cable = EXTCON_NONE;  in lc824206xa_work()
320 			data->switch_control = SWITCH_DISCONNECTED;  in lc824206xa_work()
327 	if (data->switch_control != data->previous_switch_control) {  in lc824206xa_work()
328 		lc824206xa_write_reg(data, REG_SWITCH_CONTROL, data->switch_control);  in lc824206xa_work()
329 		data->previous_switch_control = data->switch_control;  in lc824206xa_work()
332 	if (data->cable != data->previous_cable) {  in lc824206xa_work()
333 		extcon_set_state_sync(data->edev, data->previous_cable, false);  in lc824206xa_work()
334 		extcon_set_state_sync(data->edev, data->cable, true);  in lc824206xa_work()
335 		data->previous_cable = data->cable;  in lc824206xa_work()
338 	power_supply_changed(data->psy);  in lc824206xa_work()
350 	dev_dbg(&data->client->dev, "interrupt 0x%02x\n", intr_status);  in lc824206xa_irq()
355 	schedule_work(&data->work);  in lc824206xa_irq()
371 		val->intval = data->vbus_ok && !data->vbus_boost_enabled;  in lc824206xa_psy_get_prop()
374 		val->intval = data->usb_type;  in lc824206xa_psy_get_prop()
377 		switch (data->usb_type) {  in lc824206xa_psy_get_prop()
380 			val->intval = 2000000;  in lc824206xa_psy_get_prop()
383 			val->intval = 1500000;  in lc824206xa_psy_get_prop()
386 			val->intval = 500000;  in lc824206xa_psy_get_prop()
390 		return -EINVAL;  in lc824206xa_psy_get_prop()
403 	.name = "lc824206xa-charger-detect",
418 	struct device *dev = &client->dev;  in lc824206xa_probe()
424 		return -ENOMEM;  in lc824206xa_probe()
426 	data->client = client;  in lc824206xa_probe()
427 	INIT_WORK(&data->work, lc824206xa_work);  in lc824206xa_probe()
428 	data->cable = EXTCON_NONE;  in lc824206xa_probe()
429 	data->previous_cable = EXTCON_NONE;  in lc824206xa_probe()
430 	data->usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in lc824206xa_probe()
431 	/* Some designs use a custom fast-charge protocol over the mic L/R inputs */  in lc824206xa_probe()
432 	data->fastcharge_over_miclr =  in lc824206xa_probe()
433 		device_property_read_bool(dev, "onnn,enable-miclr-for-dcp");  in lc824206xa_probe()
435 	data->vbus_boost = devm_regulator_get(dev, "vbus");  in lc824206xa_probe()
436 	if (IS_ERR(data->vbus_boost))  in lc824206xa_probe()
437 		return dev_err_probe(dev, PTR_ERR(data->vbus_boost),  in lc824206xa_probe()
450 		return -EIO;  in lc824206xa_probe()
453 	data->edev = devm_extcon_dev_allocate(dev, lc824206xa_cables);  in lc824206xa_probe()
454 	if (IS_ERR(data->edev))  in lc824206xa_probe()
455 		return PTR_ERR(data->edev);  in lc824206xa_probe()
457 	ret = devm_extcon_dev_register(dev, data->edev);  in lc824206xa_probe()
462 	data->psy = devm_power_supply_register(dev, &lc824206xa_psy_desc, &psy_cfg);  in lc824206xa_probe()
463 	if (IS_ERR(data->psy))  in lc824206xa_probe()
464 		return dev_err_probe(dev, PTR_ERR(data->psy), "registering power supply\n");  in lc824206xa_probe()
466 	ret = devm_request_threaded_irq(dev, client->irq, NULL, lc824206xa_irq,  in lc824206xa_probe()
473 	schedule_work(&data->work);  in lc824206xa_probe()
494 MODULE_DESCRIPTION("LC824206XA Micro USB Switch driver");