svn commit: r365402 - head/sys/dev/usb/controller

[Andriy Gapon]

Author: avg
Date: Mon Sep  7 06:53:29 2020
New Revision: 365402
URL: https://svnweb.freebsd.org/changeset/base/365402

Log:
  musb/allwinner: add support for configuring phy as well as device mode
  
  At least on Orange Pi PC Plus even the host mode does not work without
  enabling the phy and setting it to the host mode.
  
  The driver will now parse dr_mode property and will try to configure
  itself and the phy accordingly.
  OTG mode is not supported yet, so it is treated as the device / peripheral
  mode.
  
  The phy is enabled -- powered on -- only for the host mode.
  
  The device mode requires support from a phy driver, e.g., aw_usbphy on
  Allwinner platform.
  aw_usbphy does not support the device mode, so it cannnot work yet.
  
  MFC after:	6 weeks

Modified:
  head/sys/dev/usb/controller/musb_otg_allwinner.c

Modified: head/sys/dev/usb/controller/musb_otg_allwinner.c
==============================================================================
--- head/sys/dev/usb/controller/musb_otg_allwinner.c	Mon Sep  7 06:49:07 2020	(r365401)
+++ head/sys/dev/usb/controller/musb_otg_allwinner.c	Mon Sep  7 06:53:29 2020	(r365402)
@@ -64,6 +64,8 @@ __FBSDID("$FreeBSD$");
 
 #include <dev/extres/clk/clk.h>
 #include <dev/extres/hwreset/hwreset.h>
+#include <dev/extres/phy/phy.h>
+#include <dev/extres/phy/phy_usb.h>
 
 #ifdef __arm__
 #include <arm/allwinner/aw_machdep.h>
@@ -121,6 +123,7 @@ struct awusbdrd_softc {
 	struct resource		*res[2];
 	clk_t			clk;
 	hwreset_t		reset;
+	phy_t			phy;
 	struct bus_space	bs;
 	int			flags;
 };
@@ -382,7 +385,10 @@ awusbdrd_probe(device_t dev)
 static int
 awusbdrd_attach(device_t dev)
 {
+	char usb_mode[24];
 	struct awusbdrd_softc *sc;
+	uint8_t musb_mode;
+	int phy_mode;
 	int error;
 
 	sc = device_get_softc(dev);
@@ -392,6 +398,31 @@ awusbdrd_attach(device_t dev)
 	if (error != 0)
 		return (error);
 
+	musb_mode = MUSB2_HOST_MODE;	/* default */
+	phy_mode = PHY_USB_MODE_HOST;
+	if (OF_getprop(ofw_bus_get_node(dev), "dr_mode",
+	    &usb_mode, sizeof(usb_mode)) > 0) {
+		usb_mode[sizeof(usb_mode) - 1] = 0;
+		if (strcasecmp(usb_mode, "host") == 0) {
+			musb_mode = MUSB2_HOST_MODE;
+			phy_mode = PHY_USB_MODE_HOST;
+		} else if (strcasecmp(usb_mode, "peripheral") == 0) {
+			musb_mode = MUSB2_DEVICE_MODE;
+			phy_mode = PHY_USB_MODE_DEVICE;
+		} else if (strcasecmp(usb_mode, "otg") == 0) {
+			/*
+			 * XXX phy has PHY_USB_MODE_OTG, but MUSB does not have
+			 * it.  It's not clear how to propagate mode changes
+			 * from phy layer (that detects them) to MUSB.
+			 */
+			musb_mode = MUSB2_DEVICE_MODE;
+			phy_mode = PHY_USB_MODE_DEVICE;
+		} else {
+			device_printf(dev, "Invalid FDT dr_mode: %s\n",
+			    usb_mode);
+		}
+	}
+
 	/* AHB gate clock is required */
 	error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);
 	if (error != 0)
@@ -415,6 +446,24 @@ awusbdrd_attach(device_t dev)
 		}
 	}
 
+	/* XXX not sure if this is universally needed. */
+	(void)phy_get_by_ofw_name(dev, 0, "usb", &sc->phy);
+	if (sc->phy != NULL) {
+		device_printf(dev, "setting phy mode %d\n", phy_mode);
+		if (musb_mode == MUSB2_HOST_MODE) {
+			error = phy_enable(sc->phy);
+			if (error != 0) {
+				device_printf(dev, "Could not enable phy\n");
+				goto fail;
+			}
+		}
+		error = phy_usb_set_mode(sc->phy, phy_mode);
+		if (error != 0) {
+			device_printf(dev, "Could not set phy mode\n");
+			goto fail;
+		}
+	}
+
 	sc->sc.sc_bus.parent = dev;
 	sc->sc.sc_bus.devices = sc->sc.sc_devices;
 	sc->sc.sc_bus.devices_max = MUSB2_MAX_DEVICES;
@@ -457,7 +506,7 @@ awusbdrd_attach(device_t dev)
 	device_set_ivars(sc->sc.sc_bus.bdev, &sc->sc.sc_bus);
 	sc->sc.sc_id = 0;
 	sc->sc.sc_platform_data = sc;
-	sc->sc.sc_mode = MUSB2_HOST_MODE;	/* XXX HOST vs DEVICE mode */
+	sc->sc.sc_mode = musb_mode;
 	if (ofw_bus_is_compatible(dev, "allwinner,sun8i-h3-musb")) {
 		sc->sc.sc_ep_cfg = musbotg_ep_allwinner_h3;
 		sc->sc.sc_ep_max = DRD_EP_MAX_H3;
@@ -497,8 +546,15 @@ awusbdrd_attach(device_t dev)
 	return (0);
 
 fail:
-	if (sc->reset != NULL)
+	if (sc->phy != NULL) {
+		if (musb_mode == MUSB2_HOST_MODE)
+			(void)phy_disable(sc->phy);
+		phy_release(sc->phy);
+	}
+	if (sc->reset != NULL) {
+		hwreset_assert(sc->reset);
 		hwreset_release(sc->reset);
+	}
 	if (sc->clk != NULL)
 		clk_release(sc->clk);
 	bus_release_resources(dev, awusbdrd_spec, sc->res);
@@ -527,8 +583,16 @@ awusbdrd_detach(device_t dev)
 
 	usb_bus_mem_free_all(&sc->sc.sc_bus, NULL);
 
-	if (sc->reset != NULL)
+	if (sc->phy != NULL) {
+		if (sc->sc.sc_mode == MUSB2_HOST_MODE)
+			phy_disable(sc->phy);
+		phy_release(sc->phy);
+	}
+	if (sc->reset != NULL) {
+		if (hwreset_assert(sc->reset) != 0)
+			device_printf(dev, "failed to assert reset\n");
 		hwreset_release(sc->reset);
+	}
 	if (sc->clk != NULL)
 		clk_release(sc->clk);