dm: usb: sandbox: Add a driver for sandbox

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>

diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 9419295d0dc96a836e8334639cc04e26c0cf58f4..7658f873e0afe33ce27aba3bf46de8854f2158b4 100644 (file)
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -7,6 +7,7 @@
 
 ifdef CONFIG_DM_USB
 obj-$(CONFIG_CMD_USB) += usb-uclass.o
+obj-$(CONFIG_SANDBOX) += usb-sandbox.o
 endif
 
 # ohci

diff --git a/drivers/usb/host/usb-sandbox.c b/drivers/usb/host/usb-sandbox.c
new file mode 100644 (file)
index 0000000..c5f9822
--- /dev/null
+++ b/drivers/usb/host/usb-sandbox.c
@@ -0,0 +1,117 @@
+/*
+ * (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/root.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static void usbmon_trace(struct udevice *bus, ulong pipe,
+                        struct devrequest *setup, struct udevice *emul)
+{
+       static const char types[] = "ZICB";
+       int type;
+
+       type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
+       debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
+             pipe & USB_DIR_IN ? 'i' : 'o',
+             bus->seq,
+             (pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
+             (pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
+       if (setup) {
+               debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
+                     setup->request, setup->value, setup->index,
+                     setup->length);
+       }
+       debug(" %s", emul ? emul->name : "(no emul found)");
+
+       debug("\n");
+}
+
+static int sandbox_submit_control(struct udevice *bus,
+                                     struct usb_device *udev,
+                                     unsigned long pipe,
+                                     void *buffer, int length,
+                                     struct devrequest *setup)
+{
+       struct udevice *emul;
+       int ret;
+
+       /* Just use child of dev as emulator? */
+       debug("%s: bus=%s\n", __func__, bus->name);
+       ret = usb_emul_find(bus, pipe, &emul);
+       usbmon_trace(bus, pipe, setup, emul);
+       if (ret)
+               return ret;
+       ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
+       if (ret < 0) {
+               debug("ret=%d\n", ret);
+               udev->status = ret;
+               udev->act_len = 0;
+       } else {
+               udev->status = 0;
+               udev->act_len = ret;
+       }
+
+       return ret;
+}
+
+static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
+                              unsigned long pipe, void *buffer, int length)
+{
+       struct udevice *emul;
+       int ret;
+
+       /* Just use child of dev as emulator? */
+       debug("%s: bus=%s\n", __func__, bus->name);
+       ret = usb_emul_find(bus, pipe, &emul);
+       usbmon_trace(bus, pipe, NULL, emul);
+       if (ret)
+               return ret;
+       ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
+       if (ret < 0) {
+               debug("ret=%d\n", ret);
+               udev->status = ret;
+               udev->act_len = 0;
+       } else {
+               udev->status = 0;
+               udev->act_len = ret;
+       }
+
+       return ret;
+}
+
+static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
+{
+       return 0;
+}
+
+static int sandbox_usb_probe(struct udevice *dev)
+{
+       return 0;
+}
+
+static const struct dm_usb_ops sandbox_usb_ops = {
+       .control        = sandbox_submit_control,
+       .bulk           = sandbox_submit_bulk,
+       .alloc_device   = sandbox_alloc_device,
+};
+
+static const struct udevice_id sandbox_usb_ids[] = {
+       { .compatible = "sandbox,usb" },
+       { }
+};
+
+U_BOOT_DRIVER(usb_sandbox) = {
+       .name   = "usb_sandbox",
+       .id     = UCLASS_USB,
+       .of_match = sandbox_usb_ids,
+       .probe = sandbox_usb_probe,
+       .ops    = &sandbox_usb_ops,
+};