Merge branch 'rmobile' of git://git.denx.de/u-boot-sh
[platform/kernel/u-boot.git] / drivers / usb / host / usb-sandbox.c
1 /*
2  * (C) Copyright 2015 Google, Inc
3  * Written by Simon Glass <sjg@chromium.org>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <dm.h>
10 #include <usb.h>
11 #include <dm/root.h>
12
13 DECLARE_GLOBAL_DATA_PTR;
14
15 struct sandbox_usb_ctrl {
16         int rootdev;
17 };
18
19 static void usbmon_trace(struct udevice *bus, ulong pipe,
20                          struct devrequest *setup, struct udevice *emul)
21 {
22         static const char types[] = "ZICB";
23         int type;
24
25         type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
26         debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
27               pipe & USB_DIR_IN ? 'i' : 'o',
28               bus->seq,
29               (pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
30               (pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
31         if (setup) {
32                 debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
33                       setup->request, setup->value, setup->index,
34                       setup->length);
35         }
36         debug(" %s", emul ? emul->name : "(no emul found)");
37
38         debug("\n");
39 }
40
41 static int sandbox_submit_control(struct udevice *bus,
42                                       struct usb_device *udev,
43                                       unsigned long pipe,
44                                       void *buffer, int length,
45                                       struct devrequest *setup)
46 {
47         struct sandbox_usb_ctrl *ctrl = dev_get_priv(bus);
48         struct udevice *emul;
49         int ret;
50
51         /* Just use child of dev as emulator? */
52         debug("%s: bus=%s\n", __func__, bus->name);
53         ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
54         usbmon_trace(bus, pipe, setup, emul);
55         if (ret)
56                 return ret;
57
58         if (usb_pipedevice(pipe) == ctrl->rootdev) {
59                 if (setup->request == USB_REQ_SET_ADDRESS) {
60                         debug("%s: Set root hub's USB address\n", __func__);
61                         ctrl->rootdev = le16_to_cpu(setup->value);
62                 }
63         }
64
65         ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
66         if (ret < 0) {
67                 debug("ret=%d\n", ret);
68                 udev->status = ret;
69                 udev->act_len = 0;
70         } else {
71                 udev->status = 0;
72                 udev->act_len = ret;
73         }
74
75         return ret;
76 }
77
78 static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
79                                unsigned long pipe, void *buffer, int length)
80 {
81         struct udevice *emul;
82         int ret;
83
84         /* Just use child of dev as emulator? */
85         debug("%s: bus=%s\n", __func__, bus->name);
86         ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
87         usbmon_trace(bus, pipe, NULL, emul);
88         if (ret)
89                 return ret;
90         ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
91         if (ret < 0) {
92                 debug("ret=%d\n", ret);
93                 udev->status = ret;
94                 udev->act_len = 0;
95         } else {
96                 udev->status = 0;
97                 udev->act_len = ret;
98         }
99
100         return ret;
101 }
102
103 static int sandbox_submit_int(struct udevice *bus, struct usb_device *udev,
104                               unsigned long pipe, void *buffer, int length,
105                               int interval)
106 {
107         struct udevice *emul;
108         int ret;
109
110         /* Just use child of dev as emulator? */
111         debug("%s: bus=%s\n", __func__, bus->name);
112         ret = usb_emul_find(bus, pipe, udev->portnr, &emul);
113         usbmon_trace(bus, pipe, NULL, emul);
114         if (ret)
115                 return ret;
116         ret = usb_emul_int(emul, udev, pipe, buffer, length, interval);
117
118         return ret;
119 }
120
121 static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
122 {
123         struct sandbox_usb_ctrl *ctrl = dev_get_priv(dev);
124
125         /*
126          * Root hub will be the first device to be initailized.
127          * If this device is a root hub, initialize its device speed
128          * to high speed as we are a USB 2.0 controller.
129          */
130         if (ctrl->rootdev == 0)
131                 udev->speed = USB_SPEED_HIGH;
132
133         return 0;
134 }
135
136 static int sandbox_usb_probe(struct udevice *dev)
137 {
138         return 0;
139 }
140
141 static const struct dm_usb_ops sandbox_usb_ops = {
142         .control        = sandbox_submit_control,
143         .bulk           = sandbox_submit_bulk,
144         .interrupt      = sandbox_submit_int,
145         .alloc_device   = sandbox_alloc_device,
146 };
147
148 static const struct udevice_id sandbox_usb_ids[] = {
149         { .compatible = "sandbox,usb" },
150         { }
151 };
152
153 U_BOOT_DRIVER(usb_sandbox) = {
154         .name   = "usb_sandbox",
155         .id     = UCLASS_USB,
156         .of_match = sandbox_usb_ids,
157         .probe = sandbox_usb_probe,
158         .ops    = &sandbox_usb_ops,
159         .priv_auto_alloc_size = sizeof(struct sandbox_usb_ctrl),
160 };