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-rw-r--r--hw/input/Makefile.objs4
-rw-r--r--hw/input/virtio-input.c282
-rw-r--r--include/hw/virtio/virtio-input.h84
-rw-r--r--include/hw/virtio/virtio.h1
4 files changed, 371 insertions, 0 deletions
diff --git a/hw/input/Makefile.objs b/hw/input/Makefile.objs
index e8c80b9de2..ee8bba9013 100644
--- a/hw/input/Makefile.objs
+++ b/hw/input/Makefile.objs
@@ -8,6 +8,10 @@ common-obj-$(CONFIG_STELLARIS_INPUT) += stellaris_input.o
common-obj-$(CONFIG_TSC2005) += tsc2005.o
common-obj-$(CONFIG_VMMOUSE) += vmmouse.o
+ifeq ($(CONFIG_LINUX),y)
+common-obj-$(CONFIG_VIRTIO) += virtio-input.o
+endif
+
obj-$(CONFIG_MILKYMIST) += milkymist-softusb.o
obj-$(CONFIG_PXA2XX) += pxa2xx_keypad.o
obj-$(CONFIG_TSC210X) += tsc210x.o
diff --git a/hw/input/virtio-input.c b/hw/input/virtio-input.c
new file mode 100644
index 0000000000..e615c5cc7c
--- /dev/null
+++ b/hw/input/virtio-input.c
@@ -0,0 +1,282 @@
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * (at your option) any later version. See the COPYING file in the
+ * top-level directory.
+ */
+
+#include "qemu/iov.h"
+
+#include "hw/qdev.h"
+#include "hw/virtio/virtio.h"
+#include "hw/virtio/virtio-input.h"
+
+#include "standard-headers/linux/input.h"
+
+/* ----------------------------------------------------------------- */
+
+void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event)
+{
+ VirtQueueElement elem;
+ unsigned have, need;
+ int i, len;
+
+ /* queue up events ... */
+ if (vinput->qindex == vinput->qsize) {
+ vinput->qsize++;
+ vinput->queue = realloc(vinput->queue, vinput->qsize *
+ sizeof(virtio_input_event));
+ }
+ vinput->queue[vinput->qindex++] = *event;
+
+ /* ... until we see a report sync ... */
+ if (event->type != cpu_to_le16(EV_SYN) ||
+ event->code != cpu_to_le16(SYN_REPORT)) {
+ return;
+ }
+
+ /* ... then check available space ... */
+ need = sizeof(virtio_input_event) * vinput->qindex;
+ virtqueue_get_avail_bytes(vinput->evt, &have, NULL, need, 0);
+ if (have < need) {
+ vinput->qindex = 0;
+ fprintf(stderr, "%s: ENOSPC in vq, dropping events\n", __func__);
+ return;
+ }
+
+ /* ... and finally pass them to the guest */
+ for (i = 0; i < vinput->qindex; i++) {
+ if (!virtqueue_pop(vinput->evt, &elem)) {
+ /* should not happen, we've checked for space beforehand */
+ fprintf(stderr, "%s: Huh? No vq elem available ...\n", __func__);
+ return;
+ }
+ len = iov_from_buf(elem.in_sg, elem.in_num,
+ 0, vinput->queue+i, sizeof(virtio_input_event));
+ virtqueue_push(vinput->evt, &elem, len);
+ }
+ virtio_notify(VIRTIO_DEVICE(vinput), vinput->evt);
+ vinput->qindex = 0;
+}
+
+static void virtio_input_handle_evt(VirtIODevice *vdev, VirtQueue *vq)
+{
+ /* nothing */
+}
+
+static void virtio_input_handle_sts(VirtIODevice *vdev, VirtQueue *vq)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
+ VirtIOInput *vinput = VIRTIO_INPUT(vdev);
+ virtio_input_event event;
+ VirtQueueElement elem;
+ int len;
+
+ while (virtqueue_pop(vinput->sts, &elem)) {
+ memset(&event, 0, sizeof(event));
+ len = iov_to_buf(elem.out_sg, elem.out_num,
+ 0, &event, sizeof(event));
+ if (vic->handle_status) {
+ vic->handle_status(vinput, &event);
+ }
+ virtqueue_push(vinput->sts, &elem, len);
+ }
+ virtio_notify(vdev, vinput->sts);
+}
+
+static virtio_input_config *virtio_input_find_config(VirtIOInput *vinput,
+ uint8_t select,
+ uint8_t subsel)
+{
+ VirtIOInputConfig *cfg;
+
+ QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) {
+ if (select == cfg->config.select &&
+ subsel == cfg->config.subsel) {
+ return &cfg->config;
+ }
+ }
+ return NULL;
+}
+
+void virtio_input_add_config(VirtIOInput *vinput,
+ virtio_input_config *config)
+{
+ VirtIOInputConfig *cfg;
+
+ if (virtio_input_find_config(vinput, config->select, config->subsel)) {
+ /* should not happen */
+ fprintf(stderr, "%s: duplicate config: %d/%d\n",
+ __func__, config->select, config->subsel);
+ abort();
+ }
+
+ cfg = g_new0(VirtIOInputConfig, 1);
+ cfg->config = *config;
+ QTAILQ_INSERT_TAIL(&vinput->cfg_list, cfg, node);
+}
+
+void virtio_input_init_config(VirtIOInput *vinput,
+ virtio_input_config *config)
+{
+ int i = 0;
+
+ QTAILQ_INIT(&vinput->cfg_list);
+ while (config[i].select) {
+ virtio_input_add_config(vinput, config + i);
+ i++;
+ }
+}
+
+void virtio_input_idstr_config(VirtIOInput *vinput,
+ uint8_t select, const char *string)
+{
+ virtio_input_config id;
+
+ if (!string) {
+ return;
+ }
+ memset(&id, 0, sizeof(id));
+ id.select = select;
+ id.size = snprintf(id.u.string, sizeof(id.u.string), "%s", string);
+ virtio_input_add_config(vinput, &id);
+}
+
+static void virtio_input_get_config(VirtIODevice *vdev, uint8_t *config_data)
+{
+ VirtIOInput *vinput = VIRTIO_INPUT(vdev);
+ virtio_input_config *config;
+
+ config = virtio_input_find_config(vinput, vinput->cfg_select,
+ vinput->cfg_subsel);
+ if (config) {
+ memcpy(config_data, config, vinput->cfg_size);
+ } else {
+ memset(config_data, 0, vinput->cfg_size);
+ }
+}
+
+static void virtio_input_set_config(VirtIODevice *vdev,
+ const uint8_t *config_data)
+{
+ VirtIOInput *vinput = VIRTIO_INPUT(vdev);
+ virtio_input_config *config = (virtio_input_config *)config_data;
+
+ vinput->cfg_select = config->select;
+ vinput->cfg_subsel = config->subsel;
+ virtio_notify_config(vdev);
+}
+
+static uint32_t virtio_input_get_features(VirtIODevice *vdev, uint32_t f)
+{
+ return f;
+}
+
+static void virtio_input_set_status(VirtIODevice *vdev, uint8_t val)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
+ VirtIOInput *vinput = VIRTIO_INPUT(vdev);
+
+ if (val & VIRTIO_CONFIG_S_DRIVER_OK) {
+ if (!vinput->active) {
+ vinput->active = true;
+ if (vic->change_active) {
+ vic->change_active(vinput);
+ }
+ }
+ }
+}
+
+static void virtio_input_reset(VirtIODevice *vdev)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(vdev);
+ VirtIOInput *vinput = VIRTIO_INPUT(vdev);
+
+ if (vinput->active) {
+ vinput->active = false;
+ if (vic->change_active) {
+ vic->change_active(vinput);
+ }
+ }
+}
+
+static void virtio_input_device_realize(DeviceState *dev, Error **errp)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ VirtIOInput *vinput = VIRTIO_INPUT(dev);
+ VirtIOInputConfig *cfg;
+ Error *local_err = NULL;
+
+ if (vic->realize) {
+ vic->realize(dev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
+
+ virtio_input_idstr_config(vinput, VIRTIO_INPUT_CFG_ID_SERIAL,
+ vinput->input.serial);
+
+ QTAILQ_FOREACH(cfg, &vinput->cfg_list, node) {
+ if (vinput->cfg_size < cfg->config.size) {
+ vinput->cfg_size = cfg->config.size;
+ }
+ }
+ vinput->cfg_size += 8;
+ assert(vinput->cfg_size <= sizeof(virtio_input_config));
+
+ virtio_init(vdev, "virtio-input", VIRTIO_ID_INPUT,
+ vinput->cfg_size);
+ vinput->evt = virtio_add_queue(vdev, 64, virtio_input_handle_evt);
+ vinput->sts = virtio_add_queue(vdev, 64, virtio_input_handle_sts);
+}
+
+static void virtio_input_device_unrealize(DeviceState *dev, Error **errp)
+{
+ VirtIOInputClass *vic = VIRTIO_INPUT_GET_CLASS(dev);
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ Error *local_err = NULL;
+
+ if (vic->unrealize) {
+ vic->unrealize(dev, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ return;
+ }
+ }
+ virtio_cleanup(vdev);
+}
+
+static void virtio_input_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+
+ set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+ vdc->realize = virtio_input_device_realize;
+ vdc->unrealize = virtio_input_device_unrealize;
+ vdc->get_config = virtio_input_get_config;
+ vdc->set_config = virtio_input_set_config;
+ vdc->get_features = virtio_input_get_features;
+ vdc->set_status = virtio_input_set_status;
+ vdc->reset = virtio_input_reset;
+}
+
+static const TypeInfo virtio_input_info = {
+ .name = TYPE_VIRTIO_INPUT,
+ .parent = TYPE_VIRTIO_DEVICE,
+ .instance_size = sizeof(VirtIOInput),
+ .class_size = sizeof(VirtIOInputClass),
+ .class_init = virtio_input_class_init,
+ .abstract = true,
+};
+
+/* ----------------------------------------------------------------- */
+
+static void virtio_register_types(void)
+{
+ type_register_static(&virtio_input_info);
+}
+
+type_init(virtio_register_types)
diff --git a/include/hw/virtio/virtio-input.h b/include/hw/virtio/virtio-input.h
new file mode 100644
index 0000000000..ad915cc7c1
--- /dev/null
+++ b/include/hw/virtio/virtio-input.h
@@ -0,0 +1,84 @@
+#ifndef _QEMU_VIRTIO_INPUT_H
+#define _QEMU_VIRTIO_INPUT_H
+
+#include "ui/input.h"
+
+/* ----------------------------------------------------------------- */
+/* virtio input protocol */
+
+#include "standard-headers/linux/virtio_ids.h"
+#include "standard-headers/linux/virtio_input.h"
+
+typedef struct virtio_input_absinfo virtio_input_absinfo;
+typedef struct virtio_input_config virtio_input_config;
+typedef struct virtio_input_event virtio_input_event;
+
+#if defined(HOST_WORDS_BIGENDIAN)
+# define const_le32(_x) bswap32(_x)
+# define const_le16(_x) bswap32(_x)
+#else
+# define const_le32(_x) (_x)
+# define const_le16(_x) (_x)
+#endif
+
+/* ----------------------------------------------------------------- */
+/* qemu internals */
+
+#define TYPE_VIRTIO_INPUT "virtio-input-device"
+#define VIRTIO_INPUT(obj) \
+ OBJECT_CHECK(VirtIOInput, (obj), TYPE_VIRTIO_INPUT)
+#define VIRTIO_INPUT_GET_PARENT_CLASS(obj) \
+ OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_INPUT)
+#define VIRTIO_INPUT_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(VirtIOInputClass, obj, TYPE_VIRTIO_INPUT)
+#define VIRTIO_INPUT_CLASS(klass) \
+ OBJECT_CLASS_CHECK(VirtIOInputClass, klass, TYPE_VIRTIO_INPUT)
+
+typedef struct VirtIOInput VirtIOInput;
+typedef struct VirtIOInputClass VirtIOInputClass;
+typedef struct VirtIOInputConfig VirtIOInputConfig;
+
+struct virtio_input_conf {
+ char *serial;
+};
+
+struct VirtIOInputConfig {
+ virtio_input_config config;
+ QTAILQ_ENTRY(VirtIOInputConfig) node;
+};
+
+struct VirtIOInput {
+ VirtIODevice parent_obj;
+ uint8_t cfg_select;
+ uint8_t cfg_subsel;
+ uint32_t cfg_size;
+ QTAILQ_HEAD(, VirtIOInputConfig) cfg_list;
+ VirtQueue *evt, *sts;
+ virtio_input_conf input;
+
+ virtio_input_event *queue;
+ uint32_t qindex, qsize;
+
+ bool active;
+};
+
+struct VirtIOInputClass {
+ /*< private >*/
+ VirtioDeviceClass parent;
+ /*< public >*/
+
+ DeviceRealize realize;
+ DeviceUnrealize unrealize;
+ void (*change_active)(VirtIOInput *vinput);
+ void (*handle_status)(VirtIOInput *vinput, virtio_input_event *event);
+};
+
+void virtio_input_send(VirtIOInput *vinput, virtio_input_event *event);
+void virtio_input_init_config(VirtIOInput *vinput,
+ virtio_input_config *config);
+void virtio_input_add_config(VirtIOInput *vinput,
+ virtio_input_config *config);
+void virtio_input_idstr_config(VirtIOInput *vinput,
+ uint8_t select, const char *string);
+
+#endif /* _QEMU_VIRTIO_INPUT_H */
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index 8210cb34f9..ba74765d0b 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -188,6 +188,7 @@ int virtio_set_features(VirtIODevice *vdev, uint32_t val);
typedef struct VirtIOBlkConf VirtIOBlkConf;
struct virtio_net_conf;
typedef struct virtio_serial_conf virtio_serial_conf;
+typedef struct virtio_input_conf virtio_input_conf;
typedef struct VirtIOSCSIConf VirtIOSCSIConf;
typedef struct VirtIORNGConf VirtIORNGConf;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-23 03:02:08 +0000