1 // SPDX-License-Identifier: GPL-2.0-only
3  * tusb1210.c - TUSB1210 USB ULPI PHY driver
12 #include <linux/ulpi/driver.h>
13 #include <linux/ulpi/regs.h>
20 #define TI_VENDOR_ID		0x0451
21 #define TI_DEVICE_TUSB1210	0x1507
22 #define TI_DEVICE_TUSB1211	0x1508
24 #define TUSB1211_POWER_CONTROL				0x3d
25 #define TUSB1211_POWER_CONTROL_SET			0x3e
26 #define TUSB1211_POWER_CONTROL_CLEAR			0x3f
27 #define TUSB1211_POWER_CONTROL_SW_CONTROL		BIT(0)
31 #define TUSB1210_VENDOR_SPECIFIC2			0x80
32 #define TUSB1210_VENDOR_SPECIFIC2_IHSTX_MASK		GENMASK(3, 0)
36 #define TUSB1211_VENDOR_SPECIFIC3			0x85
37 #define TUSB1211_VENDOR_SPECIFIC3_SET			0x86
38 #define TUSB1211_VENDOR_SPECIFIC3_CLEAR			0x87
77 	struct device *dev = tusb->dev;  in tusb1210_ulpi_write()
82 		dev_err(dev, "error %d writing val 0x%02x to reg 0x%02x\n", ret, val, reg);  in tusb1210_ulpi_write()
89 	struct device *dev = tusb->dev;  in tusb1210_ulpi_read()
93 	if (ret >= 0) {  in tusb1210_ulpi_read()
95 		ret = 0;  in tusb1210_ulpi_read()
97 		dev_err(dev, "error %d reading reg 0x%02x\n", ret, reg);  in tusb1210_ulpi_read()
107 	gpiod_set_value_cansleep(tusb->gpio_reset, 1);  in tusb1210_power_on()
108 	gpiod_set_value_cansleep(tusb->gpio_cs, 1);  in tusb1210_power_on()
113 	tusb1210_ulpi_write(tusb, TUSB1210_VENDOR_SPECIFIC2, tusb->vendor_specific2);  in tusb1210_power_on()
115 	return 0;  in tusb1210_power_on()
122 	gpiod_set_value_cansleep(tusb->gpio_reset, 0);  in tusb1210_power_off()
123 	gpiod_set_value_cansleep(tusb->gpio_cs, 0);  in tusb1210_power_off()
125 	return 0;  in tusb1210_power_off()
135 	if (ret < 0)  in tusb1210_set_mode()
156 		return 0;  in tusb1210_set_mode()
159 	tusb->otg_ctrl = reg;  in tusb1210_set_mode()
177 	gpiod_set_value_cansleep(tusb->gpio_reset, 0);  in tusb1210_reset()
179 	gpiod_set_value_cansleep(tusb->gpio_reset, 1);  in tusb1210_reset()
185 	dev_dbg(tusb->dev, "charger type: %d\n", type);  in tusb1210_chg_det_set_type()
186 	tusb->chg_type = type;  in tusb1210_chg_det_set_type()
187 	tusb->chg_det_retries = 0;  in tusb1210_chg_det_set_type()
188 	power_supply_changed(tusb->psy);  in tusb1210_chg_det_set_type()
196 		dev_dbg(tusb->dev, "chg_det new state %s in %d ms\n",  in tusb1210_chg_det_set_state()
199 	tusb->chg_det_state = new_state;  in tusb1210_chg_det_set_state()
200 	mod_delayed_work(system_long_wq, &tusb->chg_det_work,  in tusb1210_chg_det_set_state()
207 	if (tusb->chg_det_retries < TUSB1210_CHG_DET_MAX_RETRIES) {  in tusb1210_chg_det_handle_ulpi_error()
208 		tusb->chg_det_retries++;  in tusb1210_chg_det_handle_ulpi_error()
218  * Boards using a TUSB121x for charger-detection have 3 power_supply class devs:
220  * tusb1211-charger-detect(1) -> charger -> fuel-gauge
223  * the charger psy needs to be read. Since the tusb1211-charger-detect psy is
224  * the start of the supplier -> supplied-to chain, power_supply_am_i_supplied()
233 	"bq24190-charger",
243 	for (i = 0; i < ARRAY_SIZE(tusb1210_chargers) && !charger; i++)  in tusb1210_get_online()
250 	if (ret == 0)  in tusb1210_get_online()
265 	dev_dbg(tusb->dev, "chg_det state %s vbus_present %d\n",  in tusb1210_chg_det_work()
266 		tusb1210_chg_det_states[tusb->chg_det_state], vbus_present);  in tusb1210_chg_det_work()
268 	switch (tusb->chg_det_state) {  in tusb1210_chg_det_work()
270 		tusb->chg_type = POWER_SUPPLY_USB_TYPE_UNKNOWN;  in tusb1210_chg_det_work()
271 		tusb->chg_det_retries = 0;  in tusb1210_chg_det_work()
273 		ret = pm_runtime_resume_and_get(tusb->dev->parent);  in tusb1210_chg_det_work()
274 		if (ret < 0) {  in tusb1210_chg_det_work()
275 			dev_err(tusb->dev, "error %d runtime-resuming\n", ret);  in tusb1210_chg_det_work()
277 			tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_CONNECTED, 0);  in tusb1210_chg_det_work()
280 		tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_START_DET, 0);  in tusb1210_chg_det_work()
288 		mutex_lock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
291 		mutex_unlock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
301 		mutex_lock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
303 		mutex_unlock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
314 		tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_FINISH_DET, 0);  in tusb1210_chg_det_work()
317 		mutex_lock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
319 		/* Set SW_CONTROL to stop the charger-det FSM */  in tusb1210_chg_det_work()
323 		/* Clear DP_VSRC_EN which may have been enabled by the charger-det FSM */  in tusb1210_chg_det_work()
327 		/* Clear CHGD_IDP_SRC_EN (may have been enabled by the charger-det FSM) */  in tusb1210_chg_det_work()
337 		/* Restore phy-parameters and OTG_CTRL register */  in tusb1210_chg_det_work()
338 		tusb1210_ulpi_write(tusb, ULPI_OTG_CTRL, tusb->otg_ctrl);  in tusb1210_chg_det_work()
340 				    tusb->vendor_specific2);  in tusb1210_chg_det_work()
342 		mutex_unlock(&tusb->phy->mutex);  in tusb1210_chg_det_work()
344 		pm_runtime_put(tusb->dev->parent);  in tusb1210_chg_det_work()
345 		tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_CONNECTED, 0);  in tusb1210_chg_det_work()
349 			tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_DISCONNECTING, 0);  in tusb1210_chg_det_work()
363 		 * after a Vbus-session end. Reset it to work around this.  in tusb1210_chg_det_work()
367 		tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_DISCONNECTED, 0);  in tusb1210_chg_det_work()
371 			tusb1210_chg_det_set_state(tusb, TUSB1210_CHG_DET_CONNECTING, 0);  in tusb1210_chg_det_work()
382 	if (psy != tusb->psy && psy->desc->type == POWER_SUPPLY_TYPE_USB)  in tusb1210_psy_notifier()
383 		queue_delayed_work(system_long_wq, &tusb->chg_det_work, 0);  in tusb1210_psy_notifier()
396 		val->intval = tusb1210_get_online(tusb);  in tusb1210_psy_get_prop()
399 		val->intval = tusb->chg_type;  in tusb1210_psy_get_prop()
402 		if (tusb->chg_type == POWER_SUPPLY_USB_TYPE_DCP)  in tusb1210_psy_get_prop()
403 			val->intval = 2000000;  in tusb1210_psy_get_prop()
405 			val->intval = 500000;  in tusb1210_psy_get_prop()
408 		return -EINVAL;  in tusb1210_psy_get_prop()
411 	return 0;  in tusb1210_psy_get_prop()
421 	.name = "tusb1211-charger-detect",
431 /* Setup charger detection if requested, on errors continue without chg-det */
435 	struct device *dev = tusb->dev;  in tusb1210_probe_charger_detect()
436 	struct ulpi *ulpi = to_ulpi_dev(dev);  in tusb1210_probe_charger_detect()  local
439 	if (!device_property_read_bool(dev->parent, "linux,phy_charger_detect"))  in tusb1210_probe_charger_detect()
442 	if (ulpi->id.product != TI_DEVICE_TUSB1211) {  in tusb1210_probe_charger_detect()
447 	ret = tusb1210_ulpi_read(tusb, ULPI_OTG_CTRL, &tusb->otg_ctrl);  in tusb1210_probe_charger_detect()
451 	tusb->psy = power_supply_register(dev, &tusb1210_psy_desc, &psy_cfg);  in tusb1210_probe_charger_detect()
452 	if (IS_ERR(tusb->psy))  in tusb1210_probe_charger_detect()
459 	tusb->chg_det_state = TUSB1210_CHG_DET_DISCONNECTED;  in tusb1210_probe_charger_detect()
460 	INIT_DELAYED_WORK(&tusb->chg_det_work, tusb1210_chg_det_work);  in tusb1210_probe_charger_detect()
461 	queue_delayed_work(system_long_wq, &tusb->chg_det_work, 2 * HZ);  in tusb1210_probe_charger_detect()
463 	tusb->psy_nb.notifier_call = tusb1210_psy_notifier;  in tusb1210_probe_charger_detect()
464 	power_supply_reg_notifier(&tusb->psy_nb);  in tusb1210_probe_charger_detect()
470 	if (!IS_ERR_OR_NULL(tusb->psy)) {  in tusb1210_remove_charger_detect()
471 		power_supply_unreg_notifier(&tusb->psy_nb);  in tusb1210_remove_charger_detect()
472 		cancel_delayed_work_sync(&tusb->chg_det_work);  in tusb1210_remove_charger_detect()
473 		power_supply_unregister(tusb->psy);  in tusb1210_remove_charger_detect()
488 static int tusb1210_probe(struct ulpi *ulpi)  in tusb1210_probe()  argument
490 	struct device *dev = &ulpi->dev;  in tusb1210_probe()
497 		return -ENOMEM;  in tusb1210_probe()
499 	tusb->dev = dev;  in tusb1210_probe()
501 	tusb->gpio_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);  in tusb1210_probe()
502 	if (IS_ERR(tusb->gpio_reset))  in tusb1210_probe()
503 		return PTR_ERR(tusb->gpio_reset);  in tusb1210_probe()
505 	gpiod_set_value_cansleep(tusb->gpio_reset, 1);  in tusb1210_probe()
507 	tusb->gpio_cs = devm_gpiod_get_optional(dev, "cs", GPIOD_OUT_LOW);  in tusb1210_probe()
508 	if (IS_ERR(tusb->gpio_cs))  in tusb1210_probe()
509 		return PTR_ERR(tusb->gpio_cs);  in tusb1210_probe()
511 	gpiod_set_value_cansleep(tusb->gpio_cs, 1);  in tusb1210_probe()
538 	tusb->vendor_specific2 = reg;  in tusb1210_probe()
542 	tusb->phy = ulpi_phy_create(ulpi, &phy_ops);  in tusb1210_probe()
543 	if (IS_ERR(tusb->phy)) {  in tusb1210_probe()
544 		ret = PTR_ERR(tusb->phy);  in tusb1210_probe()
548 	phy_set_drvdata(tusb->phy, tusb);  in tusb1210_probe()
549 	ulpi_set_drvdata(ulpi, tusb);  in tusb1210_probe()
550 	return 0;  in tusb1210_probe()
557 static void tusb1210_remove(struct ulpi *ulpi)  in tusb1210_remove()  argument
559 	struct tusb1210 *tusb = ulpi_get_drvdata(ulpi);  in tusb1210_remove()
561 	ulpi_phy_destroy(ulpi, tusb->phy);  in tusb1210_remove()
570 MODULE_DEVICE_TABLE(ulpi, tusb1210_ulpi_id);
586 MODULE_DESCRIPTION("TUSB1210 ULPI PHY driver");