LXR uboot/drivers/usb/host/usb-sandbox.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2015 Google, Inc
   4 * Written by Simon Glass <sjg@chromium.org>
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <usb.h>
  10#include <dm/root.h>
  11
  12struct sandbox_usb_ctrl {
  13        int rootdev;
  14};
  15
  16static void usbmon_trace(struct udevice *bus, ulong pipe,
  17                         struct devrequest *setup, struct udevice *emul)
  18{
  19        static const char types[] = "ZICB";
  20        int type;
  21
  22        type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
  23        debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
  24              pipe & USB_DIR_IN ? 'i' : 'o',
  25              bus->seq,
  26              (pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
  27              (pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
  28        if (setup) {
  29                debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
  30                      setup->request, setup->value, setup->index,
  31                      setup->length);
  32        }
  33        debug(" %s", emul ? emul->name : "(no emul found)");
  34
  35        debug("\n");
  36}
  37
  38static int sandbox_submit_control(struct udevice *bus,
  39                                      struct usb_device *udev,
  40                                      unsigned long pipe,
  41                                      void *buffer, int length,
  42                                      struct devrequest *setup)
  43{
  44        struct sandbox_usb_ctrl *ctrl = dev_get_priv(bus);
  45        struct udevice *emul;
  46        int ret;
  47
  48        /* Just use child of dev as emulator? */
  49        debug("%s: bus=%s\n", __func__, bus->name);
  50        ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
  51        usbmon_trace(bus, pipe, setup, emul);
  52        if (ret)
  53                return ret;
  54
  55        if (usb_pipedevice(pipe) == ctrl->rootdev) {
  56                if (setup->request == USB_REQ_SET_ADDRESS) {
  57                        debug("%s: Set root hub's USB address\n", __func__);
  58                        ctrl->rootdev = le16_to_cpu(setup->value);
  59                }
  60        }
  61
  62        ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
  63        if (ret < 0) {
  64                debug("ret=%d\n", ret);
  65                udev->status = ret;
  66                udev->act_len = 0;
  67        } else {
  68                udev->status = 0;
  69                udev->act_len = ret;
  70        }
  71
  72        return ret;
  73}
  74
  75static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
  76                               unsigned long pipe, void *buffer, int length)
  77{
  78        struct udevice *emul;
  79        int ret;
  80
  81        /* Just use child of dev as emulator? */
  82        debug("%s: bus=%s\n", __func__, bus->name);
  83        ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
  84        usbmon_trace(bus, pipe, NULL, emul);
  85        if (ret)
  86                return ret;
  87        ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
  88        if (ret < 0) {
  89                debug("ret=%d\n", ret);
  90                udev->status = ret;
  91                udev->act_len = 0;
  92        } else {
  93                udev->status = 0;
  94                udev->act_len = ret;
  95        }
  96
  97        return ret;
  98}
  99
 100static int sandbox_submit_int(struct udevice *bus, struct usb_device *udev,
 101                              unsigned long pipe, void *buffer, int length,
 102                              int interval)
 103{
 104        struct udevice *emul;
 105        int ret;
 106
 107        /* Just use child of dev as emulator? */
 108        debug("%s: bus=%s\n", __func__, bus->name);
 109        ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
 110        usbmon_trace(bus, pipe, NULL, emul);
 111        if (ret)
 112                return ret;
 113        ret = usb_emul_int(emul, udev, pipe, buffer, length, interval);
 114
 115        return ret;
 116}
 117
 118static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
 119{
 120        struct sandbox_usb_ctrl *ctrl = dev_get_priv(dev);
 121
 122        /*
 123         * Root hub will be the first device to be initailized.
 124         * If this device is a root hub, initialize its device speed
 125         * to high speed as we are a USB 2.0 controller.
 126         */
 127        if (ctrl->rootdev == 0)
 128                udev->speed = USB_SPEED_HIGH;
 129
 130        return 0;
 131}
 132
 133static int sandbox_usb_probe(struct udevice *dev)
 134{
 135        return 0;
 136}
 137
 138static const struct dm_usb_ops sandbox_usb_ops = {
 139        .control        = sandbox_submit_control,
 140        .bulk           = sandbox_submit_bulk,
 141        .interrupt      = sandbox_submit_int,
 142        .alloc_device   = sandbox_alloc_device,
 143};
 144
 145static const struct udevice_id sandbox_usb_ids[] = {
 146        { .compatible = "sandbox,usb" },
 147        { }
 148};
 149
 150U_BOOT_DRIVER(usb_sandbox) = {
 151        .name   = "usb_sandbox",
 152        .id     = UCLASS_USB,
 153        .of_match = sandbox_usb_ids,
 154        .probe = sandbox_usb_probe,
 155        .ops    = &sandbox_usb_ops,
 156        .priv_auto_alloc_size = sizeof(struct sandbox_usb_ctrl),
 157};
 158