1 files changed, 550 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/common/usb_hub.c b/qemu/roms/u-boot/common/usb_hub.c
new file mode 100644
index 000000000..ffac0e743
--- /dev/null
+++ b/qemu/roms/u-boot/common/usb_hub.c
@@ -0,0 +1,550 @@
+/*
+ * Most of this source has been derived from the Linux USB
+ * project:
+ * (C) Copyright Linus Torvalds 1999
+ * (C) Copyright Johannes Erdfelt 1999-2001
+ * (C) Copyright Andreas Gal 1999
+ * (C) Copyright Gregory P. Smith 1999
+ * (C) Copyright Deti Fliegl 1999 (new USB architecture)
+ * (C) Copyright Randy Dunlap 2000
+ * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
+ * (C) Copyright Yggdrasil Computing, Inc. 2000
+ *     (usb_device_id matching changes by Adam J. Richter)
+ *
+ * Adapted for U-Boot:
+ * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/****************************************************************************
+ * HUB "Driver"
+ * Probes device for being a hub and configurate it
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+#include <asm/unaligned.h>
+#include <linux/ctype.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+#include <usb.h>
+#ifdef CONFIG_4xx
+#include <asm/4xx_pci.h>
+#endif
+
+#ifndef CONFIG_USB_HUB_MIN_POWER_ON_DELAY
+#define CONFIG_USB_HUB_MIN_POWER_ON_DELAY	100
+#endif
+
+#define USB_BUFSIZ	512
+
+static struct usb_hub_device hub_dev[USB_MAX_HUB];
+static int usb_hub_index;
+
+__weak void usb_hub_reset_devices(int port)
+{
+	return;
+}
+
+static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
+		USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
+}
+
+static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+				USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
+				port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+				USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
+				port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+static int usb_get_hub_status(struct usb_device *dev, void *data)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
+			data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+static int usb_get_port_status(struct usb_device *dev, int port, void *data)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
+			data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+
+static void usb_hub_power_on(struct usb_hub_device *hub)
+{
+	int i;
+	struct usb_device *dev;
+	unsigned pgood_delay = hub->desc.bPwrOn2PwrGood * 2;
+	ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
+	unsigned short portstatus;
+	int ret;
+
+	dev = hub->pusb_dev;
+
+	/*
+	 * Enable power to the ports:
+	 * Here we Power-cycle the ports: aka,
+	 * turning them off and turning on again.
+	 */
+	debug("enabling power on all ports\n");
+	for (i = 0; i < dev->maxchild; i++) {
+		usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
+		debug("port %d returns %lX\n", i + 1, dev->status);
+	}
+
+	/* Wait at least 2*bPwrOn2PwrGood for PP to change */
+	mdelay(pgood_delay);
+
+	for (i = 0; i < dev->maxchild; i++) {
+		ret = usb_get_port_status(dev, i + 1, portsts);
+		if (ret < 0) {
+			debug("port %d: get_port_status failed\n", i + 1);
+			continue;
+		}
+
+		/*
+		 * Check to confirm the state of Port Power:
+		 * xHCI says "After modifying PP, s/w shall read
+		 * PP and confirm that it has reached the desired state
+		 * before modifying it again, undefined behavior may occur
+		 * if this procedure is not followed".
+		 * EHCI doesn't say anything like this, but no harm in keeping
+		 * this.
+		 */
+		portstatus = le16_to_cpu(portsts->wPortStatus);
+		if (portstatus & (USB_PORT_STAT_POWER << 1)) {
+			debug("port %d: Port power change failed\n", i + 1);
+			continue;
+		}
+	}
+
+	for (i = 0; i < dev->maxchild; i++) {
+		usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
+		debug("port %d returns %lX\n", i + 1, dev->status);
+	}
+
+	/* Wait for power to become stable */
+	mdelay(max(pgood_delay, CONFIG_USB_HUB_MIN_POWER_ON_DELAY));
+}
+
+void usb_hub_reset(void)
+{
+	usb_hub_index = 0;
+}
+
+static struct usb_hub_device *usb_hub_allocate(void)
+{
+	if (usb_hub_index < USB_MAX_HUB)
+		return &hub_dev[usb_hub_index++];
+
+	printf("ERROR: USB_MAX_HUB (%d) reached\n", USB_MAX_HUB);
+	return NULL;
+}
+
+#define MAX_TRIES 5
+
+static inline char *portspeed(int portstatus)
+{
+	char *speed_str;
+
+	switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
+	case USB_PORT_STAT_SUPER_SPEED:
+		speed_str = "5 Gb/s";
+		break;
+	case USB_PORT_STAT_HIGH_SPEED:
+		speed_str = "480 Mb/s";
+		break;
+	case USB_PORT_STAT_LOW_SPEED:
+		speed_str = "1.5 Mb/s";
+		break;
+	default:
+		speed_str = "12 Mb/s";
+		break;
+	}
+
+	return speed_str;
+}
+
+int hub_port_reset(struct usb_device *dev, int port,
+			unsigned short *portstat)
+{
+	int tries;
+	ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
+	unsigned short portstatus, portchange;
+
+	debug("hub_port_reset: resetting port %d...\n", port);
+	for (tries = 0; tries < MAX_TRIES; tries++) {
+
+		usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
+		mdelay(200);
+
+		if (usb_get_port_status(dev, port + 1, portsts) < 0) {
+			debug("get_port_status failed status %lX\n",
+			      dev->status);
+			return -1;
+		}
+		portstatus = le16_to_cpu(portsts->wPortStatus);
+		portchange = le16_to_cpu(portsts->wPortChange);
+
+		debug("portstatus %x, change %x, %s\n", portstatus, portchange,
+							portspeed(portstatus));
+
+		debug("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
+		      "  USB_PORT_STAT_ENABLE %d\n",
+		      (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
+		      (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
+		      (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
+
+		if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
+		    !(portstatus & USB_PORT_STAT_CONNECTION))
+			return -1;
+
+		if (portstatus & USB_PORT_STAT_ENABLE)
+			break;
+
+		mdelay(200);
+	}
+
+	if (tries == MAX_TRIES) {
+		debug("Cannot enable port %i after %i retries, " \
+		      "disabling port.\n", port + 1, MAX_TRIES);
+		debug("Maybe the USB cable is bad?\n");
+		return -1;
+	}
+
+	usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
+	*portstat = portstatus;
+	return 0;
+}
+
+
+void usb_hub_port_connect_change(struct usb_device *dev, int port)
+{
+	struct usb_device *usb;
+	ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
+	unsigned short portstatus;
+
+	/* Check status */
+	if (usb_get_port_status(dev, port + 1, portsts) < 0) {
+		debug("get_port_status failed\n");
+		return;
+	}
+
+	portstatus = le16_to_cpu(portsts->wPortStatus);
+	debug("portstatus %x, change %x, %s\n",
+	      portstatus,
+	      le16_to_cpu(portsts->wPortChange),
+	      portspeed(portstatus));
+
+	/* Clear the connection change status */
+	usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
+
+	/* Disconnect any existing devices under this port */
+	if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
+	     (!(portstatus & USB_PORT_STAT_ENABLE))) || (dev->children[port])) {
+		debug("usb_disconnect(&hub->children[port]);\n");
+		/* Return now if nothing is connected */
+		if (!(portstatus & USB_PORT_STAT_CONNECTION))
+			return;
+	}
+	mdelay(200);
+
+	/* Reset the port */
+	if (hub_port_reset(dev, port, &portstatus) < 0) {
+		printf("cannot reset port %i!?\n", port + 1);
+		return;
+	}
+
+	mdelay(200);
+
+	/* Allocate a new device struct for it */
+	usb = usb_alloc_new_device(dev->controller);
+
+	switch (portstatus & USB_PORT_STAT_SPEED_MASK) {
+	case USB_PORT_STAT_SUPER_SPEED:
+		usb->speed = USB_SPEED_SUPER;
+		break;
+	case USB_PORT_STAT_HIGH_SPEED:
+		usb->speed = USB_SPEED_HIGH;
+		break;
+	case USB_PORT_STAT_LOW_SPEED:
+		usb->speed = USB_SPEED_LOW;
+		break;
+	default:
+		usb->speed = USB_SPEED_FULL;
+		break;
+	}
+
+	dev->children[port] = usb;
+	usb->parent = dev;
+	usb->portnr = port + 1;
+	/* Run it through the hoops (find a driver, etc) */
+	if (usb_new_device(usb)) {
+		/* Woops, disable the port */
+		usb_free_device();
+		dev->children[port] = NULL;
+		debug("hub: disabling port %d\n", port + 1);
+		usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
+	}
+}
+
+
+static int usb_hub_configure(struct usb_device *dev)
+{
+	int i, length;
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, USB_BUFSIZ);
+	unsigned char *bitmap;
+	short hubCharacteristics;
+	struct usb_hub_descriptor *descriptor;
+	struct usb_hub_device *hub;
+	__maybe_unused struct usb_hub_status *hubsts;
+
+	/* "allocate" Hub device */
+	hub = usb_hub_allocate();
+	if (hub == NULL)
+		return -1;
+	hub->pusb_dev = dev;
+	/* Get the the hub descriptor */
+	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
+		debug("usb_hub_configure: failed to get hub " \
+		      "descriptor, giving up %lX\n", dev->status);
+		return -1;
+	}
+	descriptor = (struct usb_hub_descriptor *)buffer;
+
+	length = min(descriptor->bLength, sizeof(struct usb_hub_descriptor));
+
+	if (usb_get_hub_descriptor(dev, buffer, length) < 0) {
+		debug("usb_hub_configure: failed to get hub " \
+		      "descriptor 2nd giving up %lX\n", dev->status);
+		return -1;
+	}
+	memcpy((unsigned char *)&hub->desc, buffer, length);
+	/* adjust 16bit values */
+	put_unaligned(le16_to_cpu(get_unaligned(
+			&descriptor->wHubCharacteristics)),
+			&hub->desc.wHubCharacteristics);
+	/* set the bitmap */
+	bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
+	/* devices not removable by default */
+	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
+	bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
+	memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
+
+	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
+		hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
+
+	for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
+		hub->desc.PortPowerCtrlMask[i] = descriptor->PortPowerCtrlMask[i];
+
+	dev->maxchild = descriptor->bNbrPorts;
+	debug("%d ports detected\n", dev->maxchild);
+
+	hubCharacteristics = get_unaligned(&hub->desc.wHubCharacteristics);
+	switch (hubCharacteristics & HUB_CHAR_LPSM) {
+	case 0x00:
+		debug("ganged power switching\n");
+		break;
+	case 0x01:
+		debug("individual port power switching\n");
+		break;
+	case 0x02:
+	case 0x03:
+		debug("unknown reserved power switching mode\n");
+		break;
+	}
+
+	if (hubCharacteristics & HUB_CHAR_COMPOUND)
+		debug("part of a compound device\n");
+	else
+		debug("standalone hub\n");
+
+	switch (hubCharacteristics & HUB_CHAR_OCPM) {
+	case 0x00:
+		debug("global over-current protection\n");
+		break;
+	case 0x08:
+		debug("individual port over-current protection\n");
+		break;
+	case 0x10:
+	case 0x18:
+		debug("no over-current protection\n");
+		break;
+	}
+
+	debug("power on to power good time: %dms\n",
+	      descriptor->bPwrOn2PwrGood * 2);
+	debug("hub controller current requirement: %dmA\n",
+	      descriptor->bHubContrCurrent);
+
+	for (i = 0; i < dev->maxchild; i++)
+		debug("port %d is%s removable\n", i + 1,
+		      hub->desc.DeviceRemovable[(i + 1) / 8] & \
+		      (1 << ((i + 1) % 8)) ? " not" : "");
+
+	if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
+		debug("usb_hub_configure: failed to get Status - " \
+		      "too long: %d\n", descriptor->bLength);
+		return -1;
+	}
+
+	if (usb_get_hub_status(dev, buffer) < 0) {
+		debug("usb_hub_configure: failed to get Status %lX\n",
+		      dev->status);
+		return -1;
+	}
+
+#ifdef DEBUG
+	hubsts = (struct usb_hub_status *)buffer;
+#endif
+
+	debug("get_hub_status returned status %X, change %X\n",
+	      le16_to_cpu(hubsts->wHubStatus),
+	      le16_to_cpu(hubsts->wHubChange));
+	debug("local power source is %s\n",
+	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
+	      "lost (inactive)" : "good");
+	debug("%sover-current condition exists\n",
+	      (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
+	      "" : "no ");
+	usb_hub_power_on(hub);
+
+	/*
+	 * Reset any devices that may be in a bad state when applying
+	 * the power.  This is a __weak function.  Resetting of the devices
+	 * should occur in the board file of the device.
+	 */
+	for (i = 0; i < dev->maxchild; i++)
+		usb_hub_reset_devices(i + 1);
+
+	for (i = 0; i < dev->maxchild; i++) {
+		ALLOC_CACHE_ALIGN_BUFFER(struct usb_port_status, portsts, 1);
+		unsigned short portstatus, portchange;
+		int ret;
+		ulong start = get_timer(0);
+
+		/*
+		 * Wait for (whichever finishes first)
+		 *  - A maximum of 10 seconds
+		 *    This is a purely observational value driven by connecting
+		 *    a few broken pen drives and taking the max * 1.5 approach
+		 *  - connection_change and connection state to report same
+		 *    state
+		 */
+		do {
+			ret = usb_get_port_status(dev, i + 1, portsts);
+			if (ret < 0) {
+				debug("get_port_status failed\n");
+				break;
+			}
+
+			portstatus = le16_to_cpu(portsts->wPortStatus);
+			portchange = le16_to_cpu(portsts->wPortChange);
+
+			if ((portchange & USB_PORT_STAT_C_CONNECTION) ==
+				(portstatus & USB_PORT_STAT_CONNECTION))
+				break;
+
+		} while (get_timer(start) < CONFIG_SYS_HZ * 10);
+
+		if (ret < 0)
+			continue;
+
+		debug("Port %d Status %X Change %X\n",
+		      i + 1, portstatus, portchange);
+
+		if (portchange & USB_PORT_STAT_C_CONNECTION) {
+			debug("port %d connection change\n", i + 1);
+			usb_hub_port_connect_change(dev, i);
+		}
+		if (portchange & USB_PORT_STAT_C_ENABLE) {
+			debug("port %d enable change, status %x\n",
+			      i + 1, portstatus);
+			usb_clear_port_feature(dev, i + 1,
+						USB_PORT_FEAT_C_ENABLE);
+			/*
+			 * The following hack causes a ghost device problem
+			 * to Faraday EHCI
+			 */
+#ifndef CONFIG_USB_EHCI_FARADAY
+			/* EM interference sometimes causes bad shielded USB
+			 * devices to be shutdown by the hub, this hack enables
+			 * them again. Works at least with mouse driver */
+			if (!(portstatus & USB_PORT_STAT_ENABLE) &&
+			     (portstatus & USB_PORT_STAT_CONNECTION) &&
+			     ((dev->children[i]))) {
+				debug("already running port %i "  \
+				      "disabled by hub (EMI?), " \
+				      "re-enabling...\n", i + 1);
+				      usb_hub_port_connect_change(dev, i);
+			}
+#endif
+		}
+		if (portstatus & USB_PORT_STAT_SUSPEND) {
+			debug("port %d suspend change\n", i + 1);
+			usb_clear_port_feature(dev, i + 1,
+						USB_PORT_FEAT_SUSPEND);
+		}
+
+		if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
+			debug("port %d over-current change\n", i + 1);
+			usb_clear_port_feature(dev, i + 1,
+						USB_PORT_FEAT_C_OVER_CURRENT);
+			usb_hub_power_on(hub);
+		}
+
+		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);
+		}
+	} /* end for i all ports */
+
+	return 0;
+}
+
+int usb_hub_probe(struct usb_device *dev, int ifnum)
+{
+	struct usb_interface *iface;
+	struct usb_endpoint_descriptor *ep;
+	int ret;
+
+	iface = &dev->config.if_desc[ifnum];
+	/* Is it a hub? */
+	if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
+		return 0;
+	/* Some hubs have a subclass of 1, which AFAICT according to the */
+	/*  specs is not defined, but it works */
+	if ((iface->desc.bInterfaceSubClass != 0) &&
+	    (iface->desc.bInterfaceSubClass != 1))
+		return 0;
+	/* Multiple endpoints? What kind of mutant ninja-hub is this? */
+	if (iface->desc.bNumEndpoints != 1)
+		return 0;
+	ep = &iface->ep_desc[0];
+	/* Output endpoint? Curiousier and curiousier.. */
+	if (!(ep->bEndpointAddress & USB_DIR_IN))
+		return 0;
+	/* If it's not an interrupt endpoint, we'd better punt! */
+	if ((ep->bmAttributes & 3) != 3)
+		return 0;
+	/* We found a hub */
+	debug("USB hub found\n");
+	ret = usb_hub_configure(dev);
+	return ret;
+}