X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=common%2Fusb_hub.c;h=b46dfa16ccf1285d5ff9f2f142461f6146dd06ab;hb=ee3db4fc04714c80196e49f8f3a5f157f20d2862;hp=b0ff15977fee6f1fd7bdb77d7b69c13c0ca97b14;hpb=74ffc7cbb1d2d1f218b1bd67d1bd3cc1cba8aa79;p=u-boot

diff --git a/common/usb_hub.c b/common/usb_hub.c
index b0ff15977f..b46dfa16cc 100644
--- a/common/usb_hub.c
+++ b/common/usb_hub.c
@@ -57,7 +57,7 @@ struct usb_device_scan {
 
 static LIST_HEAD(usb_scan_list);
 
-__weak void usb_hub_reset_devices(int port)
+__weak void usb_hub_reset_devices(struct usb_hub_device *hub, int port)
 {
 	return;
 }
@@ -75,6 +75,16 @@ bool usb_hub_is_root_hub(struct udevice *hub)
 
 	return false;
 }
+
+static int usb_set_hub_depth(struct usb_device *dev, int depth)
+{
+	if (depth < 0 || depth > 4)
+		return -EINVAL;
+
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_SET_HUB_DEPTH, USB_DIR_OUT | USB_RT_HUB,
+		depth, 0, NULL, 0, USB_CNTL_TIMEOUT);
+}
 #endif
 
 static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
@@ -179,7 +189,7 @@ static void usb_hub_power_on(struct usb_hub_device *hub)
 	 * but allow this time to be increased via env variable as some
 	 * devices break the spec and require longer warm-up times
 	 */
-	env = getenv("usb_pgood_delay");
+	env = env_get("usb_pgood_delay");
 	if (env)
 		pgood_delay = max(pgood_delay,
 			          (unsigned)simple_strtol(env, NULL, 0));
@@ -479,6 +489,17 @@ static int usb_scan_port(struct usb_device_scan *usb_scan)
 		return 0;
 	}
 
+	if (portchange & USB_PORT_STAT_C_RESET) {
+		debug("port %d reset change\n", i + 1);
+		usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
+	}
+
+	if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) &&
+	    usb_hub_is_superspeed(dev)) {
+		debug("port %d BH reset change\n", i + 1);
+		usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET);
+	}
+
 	/* A new USB device is ready at this point */
 	debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1);
 
@@ -533,11 +554,6 @@ static int usb_scan_port(struct usb_device_scan *usb_scan)
 		       hub->overcurrent_count[i]);
 	}
 
-	if (portchange & USB_PORT_STAT_C_RESET) {
-		debug("port %d reset change\n", i + 1);
-		usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
-	}
-
 	/*
 	 * We're done with this device, so let's remove this device from
 	 * scanning list
@@ -609,7 +625,7 @@ static int usb_hub_configure(struct usb_device *dev)
 	short hubCharacteristics;
 	struct usb_hub_descriptor *descriptor;
 	struct usb_hub_device *hub;
-	__maybe_unused struct usb_hub_status *hubsts;
+	struct usb_hub_status *hubsts;
 	int ret;
 
 	hub = usb_get_hub_device(dev);
@@ -690,6 +706,56 @@ static int usb_hub_configure(struct usb_device *dev)
 		break;
 	}
 
+	switch (dev->descriptor.bDeviceProtocol) {
+	case USB_HUB_PR_FS:
+		break;
+	case USB_HUB_PR_HS_SINGLE_TT:
+		debug("Single TT\n");
+		break;
+	case USB_HUB_PR_HS_MULTI_TT:
+		ret = usb_set_interface(dev, 0, 1);
+		if (ret == 0) {
+			debug("TT per port\n");
+			hub->tt.multi = true;
+		} else {
+			debug("Using single TT (err %d)\n", ret);
+		}
+		break;
+	case USB_HUB_PR_SS:
+		/* USB 3.0 hubs don't have a TT */
+		break;
+	default:
+		debug("Unrecognized hub protocol %d\n",
+		      dev->descriptor.bDeviceProtocol);
+		break;
+	}
+
+	/* Note 8 FS bit times == (8 bits / 12000000 bps) ~= 666ns */
+	switch (hubCharacteristics & HUB_CHAR_TTTT) {
+	case HUB_TTTT_8_BITS:
+		if (dev->descriptor.bDeviceProtocol != 0) {
+			hub->tt.think_time = 666;
+			debug("TT requires at most %d FS bit times (%d ns)\n",
+			      8, hub->tt.think_time);
+		}
+		break;
+	case HUB_TTTT_16_BITS:
+		hub->tt.think_time = 666 * 2;
+		debug("TT requires at most %d FS bit times (%d ns)\n",
+		      16, hub->tt.think_time);
+		break;
+	case HUB_TTTT_24_BITS:
+		hub->tt.think_time = 666 * 3;
+		debug("TT requires at most %d FS bit times (%d ns)\n",
+		      24, hub->tt.think_time);
+		break;
+	case HUB_TTTT_32_BITS:
+		hub->tt.think_time = 666 * 4;
+		debug("TT requires at most %d FS bit times (%d ns)\n",
+		      32, hub->tt.think_time);
+		break;
+	}
+
 	debug("power on to power good time: %dms\n",
 	      descriptor->bPwrOn2PwrGood * 2);
 	debug("hub controller current requirement: %dmA\n",
@@ -713,9 +779,7 @@ static int usb_hub_configure(struct usb_device *dev)
 		return ret;
 	}
 
-#ifdef DEBUG
 	hubsts = (struct usb_hub_status *)buffer;
-#endif
 
 	debug("get_hub_status returned status %X, change %X\n",
 	      le16_to_cpu(hubsts->wHubStatus),
@@ -726,6 +790,59 @@ static int usb_hub_configure(struct usb_device *dev)
 	debug("%sover-current condition exists\n",
 	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
 	      "" : "no ");
+
+#ifdef CONFIG_DM_USB
+	/*
+	 * Update USB host controller's internal representation of this hub
+	 * after the hub descriptor is fetched.
+	 */
+	ret = usb_update_hub_device(dev);
+	if (ret < 0 && ret != -ENOSYS) {
+		debug("%s: failed to update hub device for HCD (%x)\n",
+		      __func__, ret);
+		return ret;
+	}
+
+	/*
+	 * A maximum of seven tiers are allowed in a USB topology, and the
+	 * root hub occupies the first tier. The last tier ends with a normal
+	 * USB device. USB 3.0 hubs use a 20-bit field called 'route string'
+	 * to route packets to the designated downstream port. The hub uses a
+	 * hub depth value multiplied by four as an offset into the 'route
+	 * string' to locate the bits it uses to determine the downstream
+	 * port number.
+	 */
+	if (usb_hub_is_root_hub(dev->dev)) {
+		hub->hub_depth = -1;
+	} else {
+		struct udevice *hdev;
+		int depth = 0;
+
+		hdev = dev->dev->parent;
+		while (!usb_hub_is_root_hub(hdev)) {
+			depth++;
+			hdev = hdev->parent;
+		}
+
+		hub->hub_depth = depth;
+
+		if (usb_hub_is_superspeed(dev)) {
+			debug("set hub (%p) depth to %d\n", dev, depth);
+			/*
+			 * This request sets the value that the hub uses to
+			 * determine the index into the 'route string index'
+			 * for this hub.
+			 */
+			ret = usb_set_hub_depth(dev, depth);
+			if (ret < 0) {
+				debug("%s: failed to set hub depth (%lX)\n",
+				      __func__, dev->status);
+				return ret;
+			}
+		}
+	}
+#endif
+
 	usb_hub_power_on(hub);
 
 	/*
@@ -734,7 +851,7 @@ static int usb_hub_configure(struct usb_device *dev)
 	 * should occur in the board file of the device.
 	 */
 	for (i = 0; i < dev->maxchild; i++)
-		usb_hub_reset_devices(i + 1);
+		usb_hub_reset_devices(hub, i + 1);
 
 	/*
 	 * Only add the connected USB devices, including potential hubs,