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dfd840010b
This driver supports using emulation devices to provide a USB bus within sandbox. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Marek Vasut <marex@denx.de>
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/*
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* (C) Copyright 2015 Google, Inc
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* Written by Simon Glass <sjg@chromium.org>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <usb.h>
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#include <dm/root.h>
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DECLARE_GLOBAL_DATA_PTR;
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static void usbmon_trace(struct udevice *bus, ulong pipe,
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struct devrequest *setup, struct udevice *emul)
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{
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static const char types[] = "ZICB";
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int type;
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type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
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debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
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pipe & USB_DIR_IN ? 'i' : 'o',
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bus->seq,
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(pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
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(pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
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if (setup) {
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debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
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setup->request, setup->value, setup->index,
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setup->length);
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}
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debug(" %s", emul ? emul->name : "(no emul found)");
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debug("\n");
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}
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static int sandbox_submit_control(struct udevice *bus,
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struct usb_device *udev,
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unsigned long pipe,
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void *buffer, int length,
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struct devrequest *setup)
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{
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struct udevice *emul;
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int ret;
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/* Just use child of dev as emulator? */
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debug("%s: bus=%s\n", __func__, bus->name);
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ret = usb_emul_find(bus, pipe, &emul);
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usbmon_trace(bus, pipe, setup, emul);
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if (ret)
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return ret;
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ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
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if (ret < 0) {
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debug("ret=%d\n", ret);
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udev->status = ret;
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udev->act_len = 0;
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} else {
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udev->status = 0;
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udev->act_len = ret;
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}
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return ret;
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}
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static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
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unsigned long pipe, void *buffer, int length)
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{
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struct udevice *emul;
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int ret;
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/* Just use child of dev as emulator? */
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debug("%s: bus=%s\n", __func__, bus->name);
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ret = usb_emul_find(bus, pipe, &emul);
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usbmon_trace(bus, pipe, NULL, emul);
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if (ret)
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return ret;
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ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
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if (ret < 0) {
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debug("ret=%d\n", ret);
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udev->status = ret;
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udev->act_len = 0;
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} else {
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udev->status = 0;
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udev->act_len = ret;
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}
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return ret;
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}
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static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
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{
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return 0;
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}
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static int sandbox_usb_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct dm_usb_ops sandbox_usb_ops = {
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.control = sandbox_submit_control,
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.bulk = sandbox_submit_bulk,
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.alloc_device = sandbox_alloc_device,
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};
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static const struct udevice_id sandbox_usb_ids[] = {
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{ .compatible = "sandbox,usb" },
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{ }
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};
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U_BOOT_DRIVER(usb_sandbox) = {
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.name = "usb_sandbox",
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.id = UCLASS_USB,
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.of_match = sandbox_usb_ids,
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.probe = sandbox_usb_probe,
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.ops = &sandbox_usb_ops,
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};
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