phy/ti/phy-omap-usb2.c

3  * omap-usb2.c - USB PHY, talking to USB controller on TI SoCs.
17 #include <linux/phy/omap_control_phy.h>
18 #include <linux/phy/omap_usb.h>
19 #include <linux/phy/phy.h>
55 	struct usb_phy		phy;
71 #define	phy_to_omapusb(x)	container_of((x), struct omap_usb, phy)
93  * omap_usb2_set_comparator() - links the comparator present in the system with this phy
95  * @comparator:  the companion phy(comparator) for this phy
97  * The phy companion driver should call this API passing the phy_companion
98  * filled with set_vbus and start_srp to be used by usb phy.
100  * For use by phy companion driver
104 	struct omap_usb	*phy;
110 	phy = phy_to_omapusb(x);
111 	phy->comparator = comparator;
118 	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
120 	if (!phy->comparator || !phy->comparator->set_vbus)
123 	return phy->comparator->set_vbus(phy->comparator, enabled);
128 	struct omap_usb *phy = phy_to_omapusb(otg->usb_phy);
130 	if (!phy->comparator || !phy->comparator->start_srp)
133 	return phy->comparator->start_srp(phy->comparator);
155 static int omap_usb_phy_power(struct omap_usb *phy, int on)
160 	if (!phy->syscon_phy_power) {
161 		omap_control_phy_power(phy->control_dev, on);
166 		val = phy->power_on;
168 		val = phy->power_off;
170 	ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg,
171 				 phy->mask, val);
175 static int omap_usb_power_off(struct phy *x)
177 	struct omap_usb *phy = phy_get_drvdata(x);
179 	return omap_usb_phy_power(phy, false);
182 static int omap_usb_power_on(struct phy *x)
184 	struct omap_usb *phy = phy_get_drvdata(x);
186 	return omap_usb_phy_power(phy, true);
189 static int omap_usb2_disable_clocks(struct omap_usb *phy)
191 	clk_disable_unprepare(phy->wkupclk);
192 	if (!IS_ERR(phy->optclk))
193 		clk_disable_unprepare(phy->optclk);
198 static int omap_usb2_enable_clocks(struct omap_usb *phy)
202 	ret = clk_prepare_enable(phy->wkupclk);
204 		dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
208 	if (!IS_ERR(phy->optclk)) {
209 		ret = clk_prepare_enable(phy->optclk);
211 			dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
219 	clk_disable_unprepare(phy->wkupclk);
225 static int omap_usb_init(struct phy *x)
227 	struct omap_usb *phy = phy_get_drvdata(x);
230 	omap_usb2_enable_clocks(phy);
232 	if (phy->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
235 		 * Reduce the sensitivity of internal PHY by enabling the
241 		val = omap_usb_readl(phy->phy_base, USB2PHY_ANA_CONFIG1);
243 		omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
246 	if (phy->flags & OMAP_USB2_DISABLE_CHRG_DET) {
247 		val = omap_usb_readl(phy->phy_base, USB2PHY_CHRG_DET);
250 		omap_usb_writel(phy->phy_base, USB2PHY_CHRG_DET, val);
256 static int omap_usb_exit(struct phy *x)
258 	struct omap_usb *phy = phy_get_drvdata(x);
260 	return omap_usb2_disable_clocks(phy);
346 static void omap_usb2_init_errata(struct omap_usb *phy)
363 		phy->flags |= OMAP_USB2_DISABLE_CHRG_DET;
368 	struct omap_usb	*phy;
369 	struct phy *generic_phy;
381 	phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
382 	if (!phy)
389 	phy->dev		= &pdev->dev;
391 	phy->phy.dev		= phy->dev;
392 	phy->phy.label		= phy_data->label;
393 	phy->phy.otg		= otg;
394 	phy->phy.type		= USB_PHY_TYPE_USB2;
395 	phy->mask		= phy_data->mask;
396 	phy->power_on		= phy_data->power_on;
397 	phy->power_off		= phy_data->power_off;
398 	phy->flags		= phy_data->flags;
400 	omap_usb2_init_errata(phy);
402 	phy->phy_base = devm_platform_ioremap_resource(pdev, 0);
403 	if (IS_ERR(phy->phy_base))
404 		return PTR_ERR(phy->phy_base);
406 	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
407 								"syscon-phy-power");
408 	if (IS_ERR(phy->syscon_phy_power)) {
410 			"can't get syscon-phy-power, using control device\n");
411 		phy->syscon_phy_power = NULL;
425 		phy->control_dev = &control_pdev->dev;
428 					       "syscon-phy-power", 1,
429 					       &phy->power_reg)) {
436 	phy->wkupclk = devm_clk_get(phy->dev, "wkupclk");
437 	if (IS_ERR(phy->wkupclk)) {
438 		if (PTR_ERR(phy->wkupclk) == -EPROBE_DEFER)
442 			 PTR_ERR(phy->wkupclk));
443 		phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
445 		if (IS_ERR(phy->wkupclk))
446 			return dev_err_probe(&pdev->dev, PTR_ERR(phy->wkupclk),
453 	phy->optclk = devm_clk_get(phy->dev, "refclk");
454 	if (IS_ERR(phy->optclk)) {
455 		if (PTR_ERR(phy->optclk) == -EPROBE_DEFER)
459 		phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
461 		if (IS_ERR(phy->optclk)) {
462 			if (PTR_ERR(phy->optclk) != -EPROBE_DEFER) {
478 	otg->usb_phy = &phy->phy;
480 	platform_set_drvdata(pdev, phy);
481 	pm_runtime_enable(phy->dev);
483 	generic_phy = devm_phy_create(phy->dev, NULL, &ops);
485 		pm_runtime_disable(phy->dev);
489 	phy_set_drvdata(generic_phy, phy);
492 	phy_provider = devm_of_phy_provider_register(phy->dev,
495 		pm_runtime_disable(phy->dev);
499 	usb_add_phy_dev(&phy->phy);
506 	struct omap_usb	*phy = platform_get_drvdata(pdev);
508 	usb_remove_phy(&phy->phy);
509 	pm_runtime_disable(phy->dev);
525 MODULE_DESCRIPTION("OMAP USB2 phy driver");