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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <os.h>
#include <scsi.h>
#include <usb.h>
/*
* This driver emulates a USB keyboard using the USB HID specification (boot
* protocol)
*/
enum {
SANDBOX_KEYB_EP_IN = 1, /* endpoints */
};
enum cmd_phase {
PHASE_START,
PHASE_DATA,
PHASE_STATUS,
};
enum {
STRINGID_MANUFACTURER = 1,
STRINGID_PRODUCT,
STRINGID_SERIAL,
STRINGID_COUNT,
};
/**
* struct sandbox_keyb_priv - private state for this driver
*
*/
struct sandbox_keyb_priv {
struct membuff in;
};
struct sandbox_keyb_plat {
struct usb_string keyb_strings[STRINGID_COUNT];
};
static struct usb_device_descriptor keyb_device_desc = {
.bLength = sizeof(keyb_device_desc),
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = __constant_cpu_to_le16(0x0100),
.bDeviceClass = 0,
.bDeviceSubClass = 0,
.bDeviceProtocol = 0,
.idVendor = __constant_cpu_to_le16(0x1234),
.idProduct = __constant_cpu_to_le16(0x5679),
.iManufacturer = STRINGID_MANUFACTURER,
.iProduct = STRINGID_PRODUCT,
.iSerialNumber = STRINGID_SERIAL,
.bNumConfigurations = 1,
};
static struct usb_config_descriptor keyb_config0 = {
.bLength = sizeof(keyb_config0),
.bDescriptorType = USB_DT_CONFIG,
/* wTotalLength is set up by usb-emul-uclass */
.bNumInterfaces = 2,
.bConfigurationValue = 0,
.iConfiguration = 0,
.bmAttributes = 1 << 7 | 1 << 5,
.bMaxPower = 50,
};
static struct usb_interface_descriptor keyb_interface0 = {
.bLength = sizeof(keyb_interface0),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = USB_SUB_HID_BOOT,
.bInterfaceProtocol = USB_PROT_HID_KEYBOARD,
.iInterface = 0,
};
static struct usb_class_hid_descriptor keyb_report0 = {
.bLength = sizeof(keyb_report0),
.bDescriptorType = USB_DT_HID,
.bcdCDC = 0x101,
.bCountryCode = 0,
.bNumDescriptors = 1,
.bDescriptorType0 = USB_DT_HID_REPORT,
.wDescriptorLength0 = 0x3f,
};
static struct usb_endpoint_descriptor keyb_endpoint0_in = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = SANDBOX_KEYB_EP_IN | USB_ENDPOINT_DIR_MASK,
.bmAttributes = USB_ENDPOINT_XFER_BULK |
USB_ENDPOINT_XFER_ISOC,
.wMaxPacketSize = __constant_cpu_to_le16(8),
.bInterval = 0xa,
};
static struct usb_interface_descriptor keyb_interface1 = {
.bLength = sizeof(keyb_interface1),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 1,
.bAlternateSetting = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = USB_SUB_HID_BOOT,
.bInterfaceProtocol = USB_PROT_HID_MOUSE,
.iInterface = 0,
};
static struct usb_class_hid_descriptor keyb_report1 = {
.bLength = sizeof(struct usb_class_hid_descriptor),
.bDescriptorType = USB_DT_HID,
.bcdCDC = 0x101,
.bCountryCode = 0,
.bNumDescriptors = 1,
.bDescriptorType0 = USB_DT_HID_REPORT,
.wDescriptorLength0 = 0x32,
};
static struct usb_endpoint_descriptor keyb_endpoint1_in = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = SANDBOX_KEYB_EP_IN | USB_ENDPOINT_DIR_MASK,
.bmAttributes = USB_ENDPOINT_XFER_BULK |
USB_ENDPOINT_XFER_ISOC,
.wMaxPacketSize = __constant_cpu_to_le16(8),
.bInterval = 0xa,
};
static void *keyb_desc_list[] = {
&keyb_device_desc,
&keyb_config0,
&keyb_interface0,
&keyb_report0,
&keyb_endpoint0_in,
&keyb_interface1,
&keyb_report1,
&keyb_endpoint1_in,
NULL,
};
int sandbox_usb_keyb_add_string(struct udevice *dev, const char *str)
{
struct sandbox_keyb_priv *priv = dev_get_priv(dev);
int len, ret;
len = strlen(str);
ret = membuff_put(&priv->in, str, len);
if (ret != len)
return -ENOSPC;
return 0;
}
static int sandbox_keyb_control(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buff, int len,
struct devrequest *setup)
{
debug("pipe=%lx\n", pipe);
return -EIO;
}
static int sandbox_keyb_interrupt(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length, int interval)
{
struct sandbox_keyb_priv *priv = dev_get_priv(dev);
uint8_t *data = buffer;
int ch;
memset(data, '\0', length);
ch = membuff_getbyte(&priv->in);
if (ch != -1)
data[2] = 4 + ch - 'a';
return 0;
}
static int sandbox_keyb_bind(struct udevice *dev)
{
struct sandbox_keyb_plat *plat = dev_get_platdata(dev);
struct usb_string *fs;
fs = plat->keyb_strings;
fs[0].id = STRINGID_MANUFACTURER;
fs[0].s = "sandbox";
fs[1].id = STRINGID_PRODUCT;
fs[1].s = "keyboard";
fs[2].id = STRINGID_SERIAL;
fs[2].s = dev->name;
return usb_emul_setup_device(dev, plat->keyb_strings, keyb_desc_list);
}
static int sandbox_keyb_probe(struct udevice *dev)
{
struct sandbox_keyb_priv *priv = dev_get_priv(dev);
return membuff_new(&priv->in, 256);
}
static const struct dm_usb_ops sandbox_usb_keyb_ops = {
.control = sandbox_keyb_control,
.interrupt = sandbox_keyb_interrupt,
};
static const struct udevice_id sandbox_usb_keyb_ids[] = {
{ .compatible = "sandbox,usb-keyb" },
{ }
};
U_BOOT_DRIVER(usb_sandbox_keyb) = {
.name = "usb_sandbox_keyb",
.id = UCLASS_USB_EMUL,
.of_match = sandbox_usb_keyb_ids,
.bind = sandbox_keyb_bind,
.probe = sandbox_keyb_probe,
.ops = &sandbox_usb_keyb_ops,
.priv_auto_alloc_size = sizeof(struct sandbox_keyb_priv),
.platdata_auto_alloc_size = sizeof(struct sandbox_keyb_plat),
};
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