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qemu/hw/usb/dev-hid.c
Markus Armbruster b69c3c21a5 qdev: Unrealize must not fail 
Devices may have component devices and buses.

Device realization may fail.  Realization is recursive: a device's
realize() method realizes its components, and device_set_realized()
realizes its buses (which should in turn realize the devices on that
bus, except bus_set_realized() doesn't implement that, yet).

When realization of a component or bus fails, we need to roll back:
unrealize everything we realized so far.  If any of these unrealizes
failed, the device would be left in an inconsistent state.  Must not
happen.

device_set_realized() lets it happen: it ignores errors in the roll
back code starting at label child_realize_fail.

Since realization is recursive, unrealization must be recursive, too.
But how could a partly failed unrealize be rolled back?  We'd have to
re-realize, which can fail.  This design is fundamentally broken.

device_set_realized() does not roll back at all.  Instead, it keeps
unrealizing, ignoring further errors.

It can screw up even for a device with no buses: if the lone
dc->unrealize() fails, it still unregisters vmstate, and calls
listeners' unrealize() callback.

bus_set_realized() does not roll back either.  Instead, it stops
unrealizing.

Fortunately, no unrealize method can fail, as we'll see below.

To fix the design error, drop parameter @errp from all the unrealize
methods.

Any unrealize method that uses @errp now needs an update.  This leads
us to unrealize() methods that can fail.  Merely passing it to another
unrealize method cannot cause failure, though.  Here are the ones that
do other things with @errp:

* virtio_serial_device_unrealize()

  Fails when qbus_set_hotplug_handler() fails, but still does all the
  other work.  On failure, the device would stay realized with its
  resources completely gone.  Oops.  Can't happen, because
  qbus_set_hotplug_handler() can't actually fail here.  Pass
  &error_abort to qbus_set_hotplug_handler() instead.

* hw/ppc/spapr_drc.c's unrealize()

  Fails when object_property_del() fails, but all the other work is
  already done.  On failure, the device would stay realized with its
  vmstate registration gone.  Oops.  Can't happen, because
  object_property_del() can't actually fail here.  Pass &error_abort
  to object_property_del() instead.

* spapr_phb_unrealize()

  Fails and bails out when remove_drcs() fails, but other work is
  already done.  On failure, the device would stay realized with some
  of its resources gone.  Oops.  remove_drcs() fails only when
  chassis_from_bus()'s object_property_get_uint() fails, and it can't
  here.  Pass &error_abort to remove_drcs() instead.

Therefore, no unrealize method can fail before this patch.

device_set_realized()'s recursive unrealization via bus uses
object_property_set_bool().  Can't drop @errp there, so pass
&error_abort.

We similarly unrealize with object_property_set_bool() elsewhere,
always ignoring errors.  Pass &error_abort instead.

Several unrealize methods no longer handle errors from other unrealize
methods: virtio_9p_device_unrealize(),
virtio_input_device_unrealize(), scsi_qdev_unrealize(), ...
Much of the deleted error handling looks wrong anyway.

One unrealize methods no longer ignore such errors:
usb_ehci_pci_exit().

Several realize methods no longer ignore errors when rolling back:
v9fs_device_realize_common(), pci_qdev_unrealize(),
spapr_phb_realize(), usb_qdev_realize(), vfio_ccw_realize(),
virtio_device_realize().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200505152926.18877-17-armbru@redhat.com>
2020-05-15 07:08:14 +02:00

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/*
* QEMU USB HID devices
*
* Copyright (c) 2005 Fabrice Bellard
* Copyright (c) 2007 OpenMoko, Inc. (andrew@openedhand.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "ui/console.h"
#include "hw/usb.h"
#include "migration/vmstate.h"
#include "desc.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "qemu/timer.h"
#include "hw/input/hid.h"
#include "hw/qdev-properties.h"
/* HID interface requests */
#define GET_REPORT 0xa101
#define GET_IDLE 0xa102
#define GET_PROTOCOL 0xa103
#define SET_REPORT 0x2109
#define SET_IDLE 0x210a
#define SET_PROTOCOL 0x210b
/* HID descriptor types */
#define USB_DT_HID 0x21
#define USB_DT_REPORT 0x22
#define USB_DT_PHY 0x23
typedef struct USBHIDState {
USBDevice dev;
USBEndpoint *intr;
HIDState hid;
uint32_t usb_version;
char *display;
uint32_t head;
} USBHIDState;
#define TYPE_USB_HID "usb-hid"
#define USB_HID(obj) OBJECT_CHECK(USBHIDState, (obj), TYPE_USB_HID)
enum {
STR_MANUFACTURER = 1,
STR_PRODUCT_MOUSE,
STR_PRODUCT_TABLET,
STR_PRODUCT_KEYBOARD,
STR_SERIAL_COMPAT,
STR_CONFIG_MOUSE,
STR_CONFIG_TABLET,
STR_CONFIG_KEYBOARD,
STR_SERIAL_MOUSE,
STR_SERIAL_TABLET,
STR_SERIAL_KEYBOARD,
};
static const USBDescStrings desc_strings = {
[STR_MANUFACTURER] = "QEMU",
[STR_PRODUCT_MOUSE] = "QEMU USB Mouse",
[STR_PRODUCT_TABLET] = "QEMU USB Tablet",
[STR_PRODUCT_KEYBOARD] = "QEMU USB Keyboard",
[STR_SERIAL_COMPAT] = "42",
[STR_CONFIG_MOUSE] = "HID Mouse",
[STR_CONFIG_TABLET] = "HID Tablet",
[STR_CONFIG_KEYBOARD] = "HID Keyboard",
[STR_SERIAL_MOUSE] = "89126",
[STR_SERIAL_TABLET] = "28754",
[STR_SERIAL_KEYBOARD] = "68284",
};
static const USBDescIface desc_iface_mouse = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0x01, /* boot */
.bInterfaceProtocol = 0x02,
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x01, 0x00, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
52, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 4,
.bInterval = 0x0a,
},
},
};
static const USBDescIface desc_iface_mouse2 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0x01, /* boot */
.bInterfaceProtocol = 0x02,
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x01, 0x00, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
52, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 4,
.bInterval = 7, /* 2 ^ (8-1) * 125 usecs = 8 ms */
},
},
};
static const USBDescIface desc_iface_tablet = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceProtocol = 0x00,
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x01, 0x00, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
74, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 8,
.bInterval = 0x0a,
},
},
};
static const USBDescIface desc_iface_tablet2 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceProtocol = 0x00,
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x01, 0x00, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
74, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 8,
.bInterval = 4, /* 2 ^ (4-1) * 125 usecs = 1 ms */
},
},
};
static const USBDescIface desc_iface_keyboard = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0x01, /* boot */
.bInterfaceProtocol = 0x01, /* keyboard */
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x11, 0x01, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
0x3f, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 8,
.bInterval = 0x0a,
},
},
};
static const USBDescIface desc_iface_keyboard2 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 1,
.bInterfaceClass = USB_CLASS_HID,
.bInterfaceSubClass = 0x01, /* boot */
.bInterfaceProtocol = 0x01, /* keyboard */
.ndesc = 1,
.descs = (USBDescOther[]) {
{
/* HID descriptor */
.data = (uint8_t[]) {
0x09, /* u8 bLength */
USB_DT_HID, /* u8 bDescriptorType */
0x11, 0x01, /* u16 HID_class */
0x00, /* u8 country_code */
0x01, /* u8 num_descriptors */
USB_DT_REPORT, /* u8 type: Report */
0x3f, 0, /* u16 len */
},
},
},
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize = 8,
.bInterval = 7, /* 2 ^ (8-1) * 125 usecs = 8 ms */
},
},
};
static const USBDescDevice desc_device_mouse = {
.bcdUSB = 0x0100,
.bMaxPacketSize0 = 8,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_MOUSE,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_mouse,
},
},
};
static const USBDescDevice desc_device_mouse2 = {
.bcdUSB = 0x0200,
.bMaxPacketSize0 = 64,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_MOUSE,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_mouse2,
},
},
};
static const USBDescDevice desc_device_tablet = {
.bcdUSB = 0x0100,
.bMaxPacketSize0 = 8,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_TABLET,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_tablet,
},
},
};
static const USBDescDevice desc_device_tablet2 = {
.bcdUSB = 0x0200,
.bMaxPacketSize0 = 64,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_TABLET,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_tablet2,
},
},
};
static const USBDescDevice desc_device_keyboard = {
.bcdUSB = 0x0100,
.bMaxPacketSize0 = 8,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_KEYBOARD,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_keyboard,
},
},
};
static const USBDescDevice desc_device_keyboard2 = {
.bcdUSB = 0x0200,
.bMaxPacketSize0 = 64,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG_KEYBOARD,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface_keyboard2,
},
},
};
static const USBDescMSOS desc_msos_suspend = {
.SelectiveSuspendEnabled = true,
};
static const USBDesc desc_mouse = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_MOUSE,
.iSerialNumber = STR_SERIAL_MOUSE,
},
.full = &desc_device_mouse,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const USBDesc desc_mouse2 = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_MOUSE,
.iSerialNumber = STR_SERIAL_MOUSE,
},
.full = &desc_device_mouse,
.high = &desc_device_mouse2,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const USBDesc desc_tablet = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_TABLET,
.iSerialNumber = STR_SERIAL_TABLET,
},
.full = &desc_device_tablet,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const USBDesc desc_tablet2 = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_TABLET,
.iSerialNumber = STR_SERIAL_TABLET,
},
.full = &desc_device_tablet,
.high = &desc_device_tablet2,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const USBDesc desc_keyboard = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_KEYBOARD,
.iSerialNumber = STR_SERIAL_KEYBOARD,
},
.full = &desc_device_keyboard,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const USBDesc desc_keyboard2 = {
.id = {
.idVendor = 0x0627,
.idProduct = 0x0001,
.bcdDevice = 0,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_KEYBOARD,
.iSerialNumber = STR_SERIAL_KEYBOARD,
},
.full = &desc_device_keyboard,
.high = &desc_device_keyboard2,
.str = desc_strings,
.msos = &desc_msos_suspend,
};
static const uint8_t qemu_mouse_hid_report_descriptor[] = {
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x02, /* Usage (Mouse) */
0xa1, 0x01, /* Collection (Application) */
0x09, 0x01, /* Usage (Pointer) */
0xa1, 0x00, /* Collection (Physical) */
0x05, 0x09, /* Usage Page (Button) */
0x19, 0x01, /* Usage Minimum (1) */
0x29, 0x03, /* Usage Maximum (3) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0x01, /* Logical Maximum (1) */
0x95, 0x03, /* Report Count (3) */
0x75, 0x01, /* Report Size (1) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x05, /* Report Size (5) */
0x81, 0x01, /* Input (Constant) */
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x30, /* Usage (X) */
0x09, 0x31, /* Usage (Y) */
0x09, 0x38, /* Usage (Wheel) */
0x15, 0x81, /* Logical Minimum (-0x7f) */
0x25, 0x7f, /* Logical Maximum (0x7f) */
0x75, 0x08, /* Report Size (8) */
0x95, 0x03, /* Report Count (3) */
0x81, 0x06, /* Input (Data, Variable, Relative) */
0xc0, /* End Collection */
0xc0, /* End Collection */
};
static const uint8_t qemu_tablet_hid_report_descriptor[] = {
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x02, /* Usage (Mouse) */
0xa1, 0x01, /* Collection (Application) */
0x09, 0x01, /* Usage (Pointer) */
0xa1, 0x00, /* Collection (Physical) */
0x05, 0x09, /* Usage Page (Button) */
0x19, 0x01, /* Usage Minimum (1) */
0x29, 0x03, /* Usage Maximum (3) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0x01, /* Logical Maximum (1) */
0x95, 0x03, /* Report Count (3) */
0x75, 0x01, /* Report Size (1) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x05, /* Report Size (5) */
0x81, 0x01, /* Input (Constant) */
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x30, /* Usage (X) */
0x09, 0x31, /* Usage (Y) */
0x15, 0x00, /* Logical Minimum (0) */
0x26, 0xff, 0x7f, /* Logical Maximum (0x7fff) */
0x35, 0x00, /* Physical Minimum (0) */
0x46, 0xff, 0x7f, /* Physical Maximum (0x7fff) */
0x75, 0x10, /* Report Size (16) */
0x95, 0x02, /* Report Count (2) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x38, /* Usage (Wheel) */
0x15, 0x81, /* Logical Minimum (-0x7f) */
0x25, 0x7f, /* Logical Maximum (0x7f) */
0x35, 0x00, /* Physical Minimum (same as logical) */
0x45, 0x00, /* Physical Maximum (same as logical) */
0x75, 0x08, /* Report Size (8) */
0x95, 0x01, /* Report Count (1) */
0x81, 0x06, /* Input (Data, Variable, Relative) */
0xc0, /* End Collection */
0xc0, /* End Collection */
};
static const uint8_t qemu_keyboard_hid_report_descriptor[] = {
0x05, 0x01, /* Usage Page (Generic Desktop) */
0x09, 0x06, /* Usage (Keyboard) */
0xa1, 0x01, /* Collection (Application) */
0x75, 0x01, /* Report Size (1) */
0x95, 0x08, /* Report Count (8) */
0x05, 0x07, /* Usage Page (Key Codes) */
0x19, 0xe0, /* Usage Minimum (224) */
0x29, 0xe7, /* Usage Maximum (231) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0x01, /* Logical Maximum (1) */
0x81, 0x02, /* Input (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x08, /* Report Size (8) */
0x81, 0x01, /* Input (Constant) */
0x95, 0x05, /* Report Count (5) */
0x75, 0x01, /* Report Size (1) */
0x05, 0x08, /* Usage Page (LEDs) */
0x19, 0x01, /* Usage Minimum (1) */
0x29, 0x05, /* Usage Maximum (5) */
0x91, 0x02, /* Output (Data, Variable, Absolute) */
0x95, 0x01, /* Report Count (1) */
0x75, 0x03, /* Report Size (3) */
0x91, 0x01, /* Output (Constant) */
0x95, 0x06, /* Report Count (6) */
0x75, 0x08, /* Report Size (8) */
0x15, 0x00, /* Logical Minimum (0) */
0x25, 0xff, /* Logical Maximum (255) */
0x05, 0x07, /* Usage Page (Key Codes) */
0x19, 0x00, /* Usage Minimum (0) */
0x29, 0xff, /* Usage Maximum (255) */
0x81, 0x00, /* Input (Data, Array) */
0xc0, /* End Collection */
};
static void usb_hid_changed(HIDState *hs)
{
USBHIDState *us = container_of(hs, USBHIDState, hid);
usb_wakeup(us->intr, 0);
}
static void usb_hid_handle_reset(USBDevice *dev)
{
USBHIDState *us = USB_HID(dev);
hid_reset(&us->hid);
}
static void usb_hid_handle_control(USBDevice *dev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
USBHIDState *us = USB_HID(dev);
HIDState *hs = &us->hid;
int ret;
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
if (ret >= 0) {
return;
}
switch (request) {
/* hid specific requests */
case InterfaceRequest | USB_REQ_GET_DESCRIPTOR:
switch (value >> 8) {
case 0x22:
if (hs->kind == HID_MOUSE) {
memcpy(data, qemu_mouse_hid_report_descriptor,
sizeof(qemu_mouse_hid_report_descriptor));
p->actual_length = sizeof(qemu_mouse_hid_report_descriptor);
} else if (hs->kind == HID_TABLET) {
memcpy(data, qemu_tablet_hid_report_descriptor,
sizeof(qemu_tablet_hid_report_descriptor));
p->actual_length = sizeof(qemu_tablet_hid_report_descriptor);
} else if (hs->kind == HID_KEYBOARD) {
memcpy(data, qemu_keyboard_hid_report_descriptor,
sizeof(qemu_keyboard_hid_report_descriptor));
p->actual_length = sizeof(qemu_keyboard_hid_report_descriptor);
}
break;
default:
goto fail;
}
break;
case GET_REPORT:
if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
p->actual_length = hid_pointer_poll(hs, data, length);
} else if (hs->kind == HID_KEYBOARD) {
p->actual_length = hid_keyboard_poll(hs, data, length);
}
break;
case SET_REPORT:
if (hs->kind == HID_KEYBOARD) {
p->actual_length = hid_keyboard_write(hs, data, length);
} else {
goto fail;
}
break;
case GET_PROTOCOL:
if (hs->kind != HID_KEYBOARD && hs->kind != HID_MOUSE) {
goto fail;
}
data[0] = hs->protocol;
p->actual_length = 1;
break;
case SET_PROTOCOL:
if (hs->kind != HID_KEYBOARD && hs->kind != HID_MOUSE) {
goto fail;
}
hs->protocol = value;
break;
case GET_IDLE:
data[0] = hs->idle;
p->actual_length = 1;
break;
case SET_IDLE:
hs->idle = (uint8_t) (value >> 8);
hid_set_next_idle(hs);
if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
hid_pointer_activate(hs);
}
break;
default:
fail:
p->status = USB_RET_STALL;
break;
}
}
static void usb_hid_handle_data(USBDevice *dev, USBPacket *p)
{
USBHIDState *us = USB_HID(dev);
HIDState *hs = &us->hid;
uint8_t buf[p->iov.size];
int len = 0;
switch (p->pid) {
case USB_TOKEN_IN:
if (p->ep->nr == 1) {
if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
hid_pointer_activate(hs);
}
if (!hid_has_events(hs)) {
p->status = USB_RET_NAK;
return;
}
hid_set_next_idle(hs);
if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
len = hid_pointer_poll(hs, buf, p->iov.size);
} else if (hs->kind == HID_KEYBOARD) {
len = hid_keyboard_poll(hs, buf, p->iov.size);
}
usb_packet_copy(p, buf, len);
} else {
goto fail;
}
break;
case USB_TOKEN_OUT:
default:
fail:
p->status = USB_RET_STALL;
break;
}
}
static void usb_hid_unrealize(USBDevice *dev)
{
USBHIDState *us = USB_HID(dev);
hid_free(&us->hid);
}
static void usb_hid_initfn(USBDevice *dev, int kind,
const USBDesc *usb1, const USBDesc *usb2,
Error **errp)
{
USBHIDState *us = USB_HID(dev);
switch (us->usb_version) {
case 1:
dev->usb_desc = usb1;
break;
case 2:
dev->usb_desc = usb2;
break;
default:
dev->usb_desc = NULL;
}
if (!dev->usb_desc) {
error_setg(errp, "Invalid usb version %d for usb hid device",
us->usb_version);
return;
}
usb_desc_create_serial(dev);
usb_desc_init(dev);
us->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
hid_init(&us->hid, kind, usb_hid_changed);
if (us->display && us->hid.s) {
qemu_input_handler_bind(us->hid.s, us->display, us->head, NULL);
}
}
static void usb_tablet_realize(USBDevice *dev, Error **errp)
{
usb_hid_initfn(dev, HID_TABLET, &desc_tablet, &desc_tablet2, errp);
}
static void usb_mouse_realize(USBDevice *dev, Error **errp)
{
usb_hid_initfn(dev, HID_MOUSE, &desc_mouse, &desc_mouse2, errp);
}
static void usb_keyboard_realize(USBDevice *dev, Error **errp)
{
usb_hid_initfn(dev, HID_KEYBOARD, &desc_keyboard, &desc_keyboard2, errp);
}
static int usb_ptr_post_load(void *opaque, int version_id)
{
USBHIDState *s = opaque;
if (s->dev.remote_wakeup) {
hid_pointer_activate(&s->hid);
}
return 0;
}
static const VMStateDescription vmstate_usb_ptr = {
.name = "usb-ptr",
.version_id = 1,
.minimum_version_id = 1,
.post_load = usb_ptr_post_load,
.fields = (VMStateField[]) {
VMSTATE_USB_DEVICE(dev, USBHIDState),
VMSTATE_HID_POINTER_DEVICE(hid, USBHIDState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_usb_kbd = {
.name = "usb-kbd",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_USB_DEVICE(dev, USBHIDState),
VMSTATE_HID_KEYBOARD_DEVICE(hid, USBHIDState),
VMSTATE_END_OF_LIST()
}
};
static void usb_hid_class_initfn(ObjectClass *klass, void *data)
{
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->handle_reset = usb_hid_handle_reset;
uc->handle_control = usb_hid_handle_control;
uc->handle_data = usb_hid_handle_data;
uc->unrealize = usb_hid_unrealize;
uc->handle_attach = usb_desc_attach;
}
static const TypeInfo usb_hid_type_info = {
.name = TYPE_USB_HID,
.parent = TYPE_USB_DEVICE,
.instance_size = sizeof(USBHIDState),
.abstract = true,
.class_init = usb_hid_class_initfn,
};
static Property usb_tablet_properties[] = {
DEFINE_PROP_UINT32("usb_version", USBHIDState, usb_version, 2),
DEFINE_PROP_STRING("display", USBHIDState, display),
DEFINE_PROP_UINT32("head", USBHIDState, head, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_tablet_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_tablet_realize;
uc->product_desc = "QEMU USB Tablet";
dc->vmsd = &vmstate_usb_ptr;
device_class_set_props(dc, usb_tablet_properties);
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo usb_tablet_info = {
.name = "usb-tablet",
.parent = TYPE_USB_HID,
.class_init = usb_tablet_class_initfn,
};
static Property usb_mouse_properties[] = {
DEFINE_PROP_UINT32("usb_version", USBHIDState, usb_version, 2),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_mouse_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_mouse_realize;
uc->product_desc = "QEMU USB Mouse";
dc->vmsd = &vmstate_usb_ptr;
device_class_set_props(dc, usb_mouse_properties);
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo usb_mouse_info = {
.name = "usb-mouse",
.parent = TYPE_USB_HID,
.class_init = usb_mouse_class_initfn,
};
static Property usb_keyboard_properties[] = {
DEFINE_PROP_UINT32("usb_version", USBHIDState, usb_version, 2),
DEFINE_PROP_STRING("display", USBHIDState, display),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_keyboard_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_keyboard_realize;
uc->product_desc = "QEMU USB Keyboard";
dc->vmsd = &vmstate_usb_kbd;
device_class_set_props(dc, usb_keyboard_properties);
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo usb_keyboard_info = {
.name = "usb-kbd",
.parent = TYPE_USB_HID,
.class_init = usb_keyboard_class_initfn,
};
static void usb_hid_register_types(void)
{
type_register_static(&usb_hid_type_info);
type_register_static(&usb_tablet_info);
usb_legacy_register("usb-tablet", "tablet", NULL);
type_register_static(&usb_mouse_info);
usb_legacy_register("usb-mouse", "mouse", NULL);
type_register_static(&usb_keyboard_info);
usb_legacy_register("usb-kbd", "keyboard", NULL);
}
type_init(usb_hid_register_types)
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