--- /dev/null
+/*
+ * (C) Copyright 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <usb.h>
+#include <dm/device-internal.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* We only support up to 8 */
+#define SANDBOX_NUM_PORTS 2
+
+struct sandbox_hub_platdata {
+ struct usb_dev_platdata plat;
+ int port; /* Port number (numbered from 0) */
+};
+
+enum {
+ STRING_MANUFACTURER = 1,
+ STRING_PRODUCT,
+ STRING_SERIAL,
+
+ STRING_count,
+};
+
+static struct usb_string hub_strings[] = {
+ {STRING_MANUFACTURER, "sandbox"},
+ {STRING_PRODUCT, "hub"},
+ {STRING_SERIAL, "2345"},
+};
+
+static struct usb_device_descriptor hub_device_desc = {
+ .bLength = sizeof(hub_device_desc),
+ .bDescriptorType = USB_DT_DEVICE,
+
+ .bcdUSB = __constant_cpu_to_le16(0x0200),
+
+ .bDeviceClass = USB_CLASS_HUB,
+ .bDeviceSubClass = 0,
+ .bDeviceProtocol = 0,
+
+ .idVendor = __constant_cpu_to_le16(0x1234),
+ .idProduct = __constant_cpu_to_le16(0x5678),
+ .iManufacturer = STRING_MANUFACTURER,
+ .iProduct = STRING_PRODUCT,
+ .iSerialNumber = STRING_SERIAL,
+ .bNumConfigurations = 1,
+};
+
+static struct usb_config_descriptor hub_config1 = {
+ .bLength = sizeof(hub_config1),
+ .bDescriptorType = USB_DT_CONFIG,
+
+ /* wTotalLength is set up by usb-emul-uclass */
+ .bNumInterfaces = 1,
+ .bConfigurationValue = 0,
+ .iConfiguration = 0,
+ .bmAttributes = 1 << 7,
+ .bMaxPower = 50,
+};
+
+static struct usb_interface_descriptor hub_interface0 = {
+ .bLength = sizeof(hub_interface0),
+ .bDescriptorType = USB_DT_INTERFACE,
+
+ .bInterfaceNumber = 0,
+ .bAlternateSetting = 0,
+ .bNumEndpoints = 1,
+ .bInterfaceClass = USB_CLASS_HUB,
+ .bInterfaceSubClass = 0,
+ .bInterfaceProtocol = US_PR_CB,
+ .iInterface = 0,
+};
+
+static struct usb_endpoint_descriptor hub_endpoint0_in = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = 1 | USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_INT,
+ .wMaxPacketSize = __constant_cpu_to_le16(1024),
+ .bInterval = 0,
+};
+
+static struct usb_hub_descriptor hub_desc = {
+ .bLength = sizeof(hub_desc),
+ .bDescriptorType = USB_DT_HUB,
+ .bNbrPorts = SANDBOX_NUM_PORTS,
+ .wHubCharacteristics = __constant_cpu_to_le16(1 << 0 | 1 << 3 |
+ 1 << 7),
+ .bPwrOn2PwrGood = 2,
+ .bHubContrCurrent = 5,
+ .DeviceRemovable = {0, 0xff}, /* all ports removeable */
+#if SANDBOX_NUM_PORTS > 8
+#error "This code sets up an incorrect mask"
+#endif
+};
+
+static void *hub_desc_list[] = {
+ &hub_device_desc,
+ &hub_config1,
+ &hub_interface0,
+ &hub_endpoint0_in,
+ &hub_desc,
+ NULL,
+};
+
+struct sandbox_hub_priv {
+ int status[SANDBOX_NUM_PORTS];
+ int change[SANDBOX_NUM_PORTS];
+};
+
+static struct udevice *hub_find_device(struct udevice *hub, int port)
+{
+ struct udevice *dev;
+
+ for (device_find_first_child(hub, &dev);
+ dev;
+ device_find_next_child(&dev)) {
+ struct sandbox_hub_platdata *plat;
+
+ plat = dev_get_parent_platdata(dev);
+ if (plat->port == port)
+ return dev;
+ }
+
+ return NULL;
+}
+
+static int clrset_post_state(struct udevice *hub, int port, int clear, int set)
+{
+ struct sandbox_hub_priv *priv = dev_get_priv(hub);
+ int *status = &priv->status[port];
+ int *change = &priv->change[port];
+ int ret = 0;
+
+ if ((clear | set) & USB_PORT_STAT_POWER) {
+ struct udevice *dev = hub_find_device(hub, port);
+
+ if (dev) {
+ if (set & USB_PORT_STAT_POWER) {
+ ret = device_probe(dev);
+ debug("%s: %s: power on, probed, ret=%d\n",
+ __func__, dev->name, ret);
+ if (!ret) {
+ set |= USB_PORT_STAT_CONNECTION |
+ USB_PORT_STAT_ENABLE;
+ }
+
+ } else if (clear & USB_PORT_STAT_POWER) {
+ debug("%s: %s: power off, removed, ret=%d\n",
+ __func__, dev->name, ret);
+ ret = device_remove(dev);
+ clear |= USB_PORT_STAT_CONNECTION;
+ }
+ }
+ }
+ *change |= *status & clear;
+ *change |= ~*status & set;
+ *change &= 0x1f;
+ *status = (*status & ~clear) | set;
+
+ return ret;
+}
+
+static int sandbox_hub_submit_control_msg(struct udevice *bus,
+ struct usb_device *udev,
+ unsigned long pipe,
+ void *buffer, int length,
+ struct devrequest *setup)
+{
+ struct sandbox_hub_priv *priv = dev_get_priv(bus);
+ int ret = 0;
+
+ if (pipe == usb_rcvctrlpipe(udev, 0)) {
+ switch (setup->requesttype) {
+ case USB_RT_HUB | USB_DIR_IN:
+ switch (setup->request) {
+ case USB_REQ_GET_STATUS: {
+ struct usb_hub_status *hubsts = buffer;
+
+ hubsts->wHubStatus = 0;
+ hubsts->wHubChange = 0;
+ udev->status = 0;
+ udev->act_len = sizeof(*hubsts);
+ return 0;
+ }
+ default:
+ debug("%s: rx ctl requesttype=%x, request=%x\n",
+ __func__, setup->requesttype,
+ setup->request);
+ break;
+ }
+ case USB_RT_PORT | USB_DIR_IN:
+ switch (setup->request) {
+ case USB_REQ_GET_STATUS: {
+ struct usb_port_status *portsts = buffer;
+ int port;
+
+ port = (setup->index & USB_HUB_PORT_MASK) - 1;
+ portsts->wPortStatus = priv->status[port];
+ portsts->wPortChange = priv->change[port];
+ udev->status = 0;
+ udev->act_len = sizeof(*portsts);
+ return 0;
+ }
+ }
+ default:
+ debug("%s: rx ctl requesttype=%x, request=%x\n",
+ __func__, setup->requesttype, setup->request);
+ break;
+ }
+ } else if (pipe == usb_sndctrlpipe(udev, 0)) {
+ switch (setup->requesttype) {
+ case USB_RT_PORT:
+ switch (setup->request) {
+ case USB_REQ_SET_FEATURE: {
+ int port;
+
+ port = (setup->index & USB_HUB_PORT_MASK) - 1;
+ debug("set feature port=%x, feature=%x\n",
+ port, setup->value);
+ if (setup->value < USB_PORT_FEAT_C_CONNECTION) {
+ ret = clrset_post_state(bus, port, 0,
+ 1 << setup->value);
+ } else {
+ debug(" ** Invalid feature\n");
+ }
+ return ret;
+ }
+ case USB_REQ_CLEAR_FEATURE: {
+ int port;
+
+ port = (setup->index & USB_HUB_PORT_MASK) - 1;
+ debug("clear feature port=%x, feature=%x\n",
+ port, setup->value);
+ if (setup->value < USB_PORT_FEAT_C_CONNECTION) {
+ ret = clrset_post_state(bus, port,
+ 1 << setup->value, 0);
+ } else {
+ priv->change[port] &= 1 <<
+ (setup->value - 16);
+ }
+ udev->status = 0;
+ return 0;
+ }
+ default:
+ debug("%s: tx ctl requesttype=%x, request=%x\n",
+ __func__, setup->requesttype,
+ setup->request);
+ break;
+ }
+ default:
+ debug("%s: tx ctl requesttype=%x, request=%x\n",
+ __func__, setup->requesttype, setup->request);
+ break;
+ }
+ }
+ debug("pipe=%lx\n", pipe);
+
+ return -EIO;
+}
+
+static int sandbox_hub_bind(struct udevice *dev)
+{
+ return usb_emul_setup_device(dev, PACKET_SIZE_64, hub_strings,
+ hub_desc_list);
+}
+
+static int sandbox_child_post_bind(struct udevice *dev)
+{
+ struct sandbox_hub_platdata *plat = dev_get_parent_platdata(dev);
+
+ plat->port = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "reg", -1);
+
+ return 0;
+}
+
+static const struct dm_usb_ops sandbox_usb_hub_ops = {
+ .control = sandbox_hub_submit_control_msg,
+};
+
+static const struct udevice_id sandbox_usb_hub_ids[] = {
+ { .compatible = "sandbox,usb-hub" },
+ { }
+};
+
+U_BOOT_DRIVER(usb_sandbox_hub) = {
+ .name = "usb_sandbox_hub",
+ .id = UCLASS_USB_EMUL,
+ .of_match = sandbox_usb_hub_ids,
+ .bind = sandbox_hub_bind,
+ .ops = &sandbox_usb_hub_ops,
+ .priv_auto_alloc_size = sizeof(struct sandbox_hub_priv),
+ .per_child_platdata_auto_alloc_size =
+ sizeof(struct sandbox_hub_platdata),
+ .child_post_bind = sandbox_child_post_bind,
+};
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