usb: sandbox: Add support for interrupt operations
[oweals/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 static void usbmon_trace(struct udevice *bus, ulong pipe,
16                          struct devrequest *setup, struct udevice *emul)
17 {
18         static const char types[] = "ZICB";
19         int type;
20
21         type = (pipe & USB_PIPE_TYPE_MASK) >> USB_PIPE_TYPE_SHIFT;
22         debug("0 0 S %c%c:%d:%03ld:%ld", types[type],
23               pipe & USB_DIR_IN ? 'i' : 'o',
24               bus->seq,
25               (pipe & USB_PIPE_DEV_MASK) >> USB_PIPE_DEV_SHIFT,
26               (pipe & USB_PIPE_EP_MASK) >> USB_PIPE_EP_SHIFT);
27         if (setup) {
28                 debug(" s %02x %02x %04x %04x %04x", setup->requesttype,
29                       setup->request, setup->value, setup->index,
30                       setup->length);
31         }
32         debug(" %s", emul ? emul->name : "(no emul found)");
33
34         debug("\n");
35 }
36
37 static int sandbox_submit_control(struct udevice *bus,
38                                       struct usb_device *udev,
39                                       unsigned long pipe,
40                                       void *buffer, int length,
41                                       struct devrequest *setup)
42 {
43         struct udevice *emul;
44         int ret;
45
46         /* Just use child of dev as emulator? */
47         debug("%s: bus=%s\n", __func__, bus->name);
48         ret = usb_emul_find(bus, pipe, &emul);
49         usbmon_trace(bus, pipe, setup, emul);
50         if (ret)
51                 return ret;
52         ret = usb_emul_control(emul, udev, pipe, buffer, length, setup);
53         if (ret < 0) {
54                 debug("ret=%d\n", ret);
55                 udev->status = ret;
56                 udev->act_len = 0;
57         } else {
58                 udev->status = 0;
59                 udev->act_len = ret;
60         }
61
62         return ret;
63 }
64
65 static int sandbox_submit_bulk(struct udevice *bus, struct usb_device *udev,
66                                unsigned long pipe, void *buffer, int length)
67 {
68         struct udevice *emul;
69         int ret;
70
71         /* Just use child of dev as emulator? */
72         debug("%s: bus=%s\n", __func__, bus->name);
73         ret = usb_emul_find(bus, pipe, &emul);
74         usbmon_trace(bus, pipe, NULL, emul);
75         if (ret)
76                 return ret;
77         ret = usb_emul_bulk(emul, udev, pipe, buffer, length);
78         if (ret < 0) {
79                 debug("ret=%d\n", ret);
80                 udev->status = ret;
81                 udev->act_len = 0;
82         } else {
83                 udev->status = 0;
84                 udev->act_len = ret;
85         }
86
87         return ret;
88 }
89
90 static int sandbox_submit_int(struct udevice *bus, struct usb_device *udev,
91                               unsigned long pipe, void *buffer, int length,
92                               int interval)
93 {
94         struct udevice *emul;
95         int ret;
96
97         /* Just use child of dev as emulator? */
98         debug("%s: bus=%s\n", __func__, bus->name);
99         ret = usb_emul_find(bus, pipe, &emul);
100         usbmon_trace(bus, pipe, NULL, emul);
101         if (ret)
102                 return ret;
103         ret = usb_emul_int(emul, udev, pipe, buffer, length, interval);
104
105         return ret;
106 }
107
108 static int sandbox_alloc_device(struct udevice *dev, struct usb_device *udev)
109 {
110         return 0;
111 }
112
113 static int sandbox_usb_probe(struct udevice *dev)
114 {
115         return 0;
116 }
117
118 static const struct dm_usb_ops sandbox_usb_ops = {
119         .control        = sandbox_submit_control,
120         .bulk           = sandbox_submit_bulk,
121         .interrupt      = sandbox_submit_int,
122         .alloc_device   = sandbox_alloc_device,
123 };
124
125 static const struct udevice_id sandbox_usb_ids[] = {
126         { .compatible = "sandbox,usb" },
127         { }
128 };
129
130 U_BOOT_DRIVER(usb_sandbox) = {
131         .name   = "usb_sandbox",
132         .id     = UCLASS_USB,
133         .of_match = sandbox_usb_ids,
134         .probe = sandbox_usb_probe,
135         .ops    = &sandbox_usb_ops,
136 };