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 <log.h>
10 #include <usb.h>
11 #include <dm/root.h>
12
13 struct sandbox_usb_ctrl {
14 int rootdev;
15 };
16
usbmon_trace(struct udevice * bus,ulong pipe,struct devrequest * setup,struct udevice * emul)17 static void usbmon_trace(struct udevice *bus, ulong pipe,
18 struct devrequest *setup, struct udevice *emul)
19 {
20 static const char types[] = "ZICB";
21 int type;
22
23 type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
24 debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
25 pipe & USB_DIR_IN ? 'i' : 'o',
26 dev_seq(bus),
27 (pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
28 (pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
29 if (setup) {
30 debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
31 setup->request, setup->value, setup->index,
32 setup->length);
33 }
34 debug(" %s", emul ? emul->name : "(no emul found)");
35
36 debug("\n");
37 }
38
sandbox_submit_control(struct udevice * bus,struct usb_device * udev,unsigned long pipe,void * buffer,int length,struct devrequest * setup)39 static int sandbox_submit_control(struct udevice *bus,
40 struct usb_device *udev,
41 unsigned long pipe,
42 void *buffer, int length,
43 struct devrequest *setup)
44 {
45 struct sandbox_usb_ctrl *ctrl = dev_get_priv(bus);
46 struct udevice *emul;
47 int ret;
48
49 /* Just use child of dev as emulator? */
50 debug("%s: bus=%s\n", __func__, bus->name);
51 ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
52 usbmon_trace(bus, pipe, setup, emul);
53 if (ret)
54 return ret;
55
56 if (usb_pipedevice(pipe) == ctrl->rootdev) {
57 if (setup->request == USB_REQ_SET_ADDRESS) {
58 debug("%s: Set root hub's USB address\n", __func__);
59 ctrl->rootdev = le16_to_cpu(setup->value);
60 }
61 }
62
63 ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
64 if (ret < 0) {
65 debug("ret=%d\n", ret);
66 udev->status = ret;
67 udev->act_len = 0;
68 } else {
69 udev->status = 0;
70 udev->act_len = ret;
71 }
72
73 return ret;
74 }
75
sandbox_submit_bulk(struct udevice * bus,struct usb_device * udev,unsigned long pipe,void * buffer,int length)76 static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
77 unsigned long pipe, void *buffer, int length)
78 {
79 struct udevice *emul;
80 int ret;
81
82 /* Just use child of dev as emulator? */
83 debug("%s: bus=%s\n", __func__, bus->name);
84 ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
85 usbmon_trace(bus, pipe, NULL, emul);
86 if (ret)
87 return ret;
88 ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
89 if (ret < 0) {
90 debug("ret=%d\n", ret);
91 udev->status = ret;
92 udev->act_len = 0;
93 } else {
94 udev->status = 0;
95 udev->act_len = ret;
96 }
97
98 return ret;
99 }
100
sandbox_submit_int(struct udevice * bus,struct usb_device * udev,unsigned long pipe,void * buffer,int length,int interval,bool nonblock)101 static int sandbox_submit_int(struct udevice *bus, struct usb_device *udev,
102 unsigned long pipe, void *buffer, int length,
103 int interval, bool nonblock)
104 {
105 struct udevice *emul;
106 int ret;
107
108 /* Just use child of dev as emulator? */
109 debug("%s: bus=%s\n", __func__, bus->name);
110 ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
111 usbmon_trace(bus, pipe, NULL, emul);
112 if (ret)
113 return ret;
114 ret = usb_emul_int(emul, udev, pipe, buffer, length, interval,
115 nonblock);
116
117 return ret;
118 }
119
sandbox_alloc_device(struct udevice * dev,struct usb_device * udev)120 static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
121 {
122 struct sandbox_usb_ctrl *ctrl = dev_get_priv(dev);
123
124 /*
125 * Root hub will be the first device to be initailized.
126 * If this device is a root hub, initialize its device speed
127 * to high speed as we are a USB 2.0 controller.
128 */
129 if (ctrl->rootdev == 0)
130 udev->speed = USB_SPEED_HIGH;
131
132 return 0;
133 }
134
sandbox_usb_probe(struct udevice * dev)135 static int sandbox_usb_probe(struct udevice *dev)
136 {
137 return 0;
138 }
139
140 static const struct dm_usb_ops sandbox_usb_ops = {
141 .control = sandbox_submit_control,
142 .bulk = sandbox_submit_bulk,
143 .interrupt = sandbox_submit_int,
144 .alloc_device = sandbox_alloc_device,
145 };
146
147 static const struct udevice_id sandbox_usb_ids[] = {
148 { .compatible = "sandbox,usb" },
149 { }
150 };
151
152 U_BOOT_DRIVER(usb_sandbox) = {
153 .name = "usb_sandbox",
154 .id = UCLASS_USB,
155 .of_match = sandbox_usb_ids,
156 .probe = sandbox_usb_probe,
157 .ops = &sandbox_usb_ops,
158 .priv_auto = sizeof(struct sandbox_usb_ctrl),
159 };
160