aboutsummaryrefslogtreecommitdiff
path: root/drivers/input/xen-kbdfront.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/input/xen-kbdfront.c')
-rw-r--r--drivers/input/xen-kbdfront.c340
1 files changed, 0 insertions, 340 deletions
diff --git a/drivers/input/xen-kbdfront.c b/drivers/input/xen-kbdfront.c
deleted file mode 100644
index 0f47f4697cd..00000000000
--- a/drivers/input/xen-kbdfront.c
+++ /dev/null
@@ -1,340 +0,0 @@
-/*
- * Xen para-virtual input device
- *
- * Copyright (C) 2005 Anthony Liguori <aliguori@us.ibm.com>
- * Copyright (C) 2006-2008 Red Hat, Inc., Markus Armbruster <armbru@redhat.com>
- *
- * Based on linux/drivers/input/mouse/sermouse.c
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- */
-
-/*
- * TODO:
- *
- * Switch to grant tables together with xen-fbfront.c.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/input.h>
-#include <asm/xen/hypervisor.h>
-#include <xen/events.h>
-#include <xen/page.h>
-#include <xen/interface/io/fbif.h>
-#include <xen/interface/io/kbdif.h>
-#include <xen/xenbus.h>
-
-struct xenkbd_info {
- struct input_dev *kbd;
- struct input_dev *ptr;
- struct xenkbd_page *page;
- int irq;
- struct xenbus_device *xbdev;
- char phys[32];
-};
-
-static int xenkbd_remove(struct xenbus_device *);
-static int xenkbd_connect_backend(struct xenbus_device *, struct xenkbd_info *);
-static void xenkbd_disconnect_backend(struct xenkbd_info *);
-
-/*
- * Note: if you need to send out events, see xenfb_do_update() for how
- * to do that.
- */
-
-static irqreturn_t input_handler(int rq, void *dev_id)
-{
- struct xenkbd_info *info = dev_id;
- struct xenkbd_page *page = info->page;
- __u32 cons, prod;
-
- prod = page->in_prod;
- if (prod == page->in_cons)
- return IRQ_HANDLED;
- rmb(); /* ensure we see ring contents up to prod */
- for (cons = page->in_cons; cons != prod; cons++) {
- union xenkbd_in_event *event;
- struct input_dev *dev;
- event = &XENKBD_IN_RING_REF(page, cons);
-
- dev = info->ptr;
- switch (event->type) {
- case XENKBD_TYPE_MOTION:
- input_report_rel(dev, REL_X, event->motion.rel_x);
- input_report_rel(dev, REL_Y, event->motion.rel_y);
- break;
- case XENKBD_TYPE_KEY:
- dev = NULL;
- if (test_bit(event->key.keycode, info->kbd->keybit))
- dev = info->kbd;
- if (test_bit(event->key.keycode, info->ptr->keybit))
- dev = info->ptr;
- if (dev)
- input_report_key(dev, event->key.keycode,
- event->key.pressed);
- else
- printk(KERN_WARNING
- "xenkbd: unhandled keycode 0x%x\n",
- event->key.keycode);
- break;
- case XENKBD_TYPE_POS:
- input_report_abs(dev, ABS_X, event->pos.abs_x);
- input_report_abs(dev, ABS_Y, event->pos.abs_y);
- break;
- }
- if (dev)
- input_sync(dev);
- }
- mb(); /* ensure we got ring contents */
- page->in_cons = cons;
- notify_remote_via_irq(info->irq);
-
- return IRQ_HANDLED;
-}
-
-static int __devinit xenkbd_probe(struct xenbus_device *dev,
- const struct xenbus_device_id *id)
-{
- int ret, i;
- struct xenkbd_info *info;
- struct input_dev *kbd, *ptr;
-
- info = kzalloc(sizeof(*info), GFP_KERNEL);
- if (!info) {
- xenbus_dev_fatal(dev, -ENOMEM, "allocating info structure");
- return -ENOMEM;
- }
- dev->dev.driver_data = info;
- info->xbdev = dev;
- info->irq = -1;
- snprintf(info->phys, sizeof(info->phys), "xenbus/%s", dev->nodename);
-
- info->page = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
- if (!info->page)
- goto error_nomem;
-
- /* keyboard */
- kbd = input_allocate_device();
- if (!kbd)
- goto error_nomem;
- kbd->name = "Xen Virtual Keyboard";
- kbd->phys = info->phys;
- kbd->id.bustype = BUS_PCI;
- kbd->id.vendor = 0x5853;
- kbd->id.product = 0xffff;
- kbd->evbit[0] = BIT(EV_KEY);
- for (i = KEY_ESC; i < KEY_UNKNOWN; i++)
- set_bit(i, kbd->keybit);
- for (i = KEY_OK; i < KEY_MAX; i++)
- set_bit(i, kbd->keybit);
-
- ret = input_register_device(kbd);
- if (ret) {
- input_free_device(kbd);
- xenbus_dev_fatal(dev, ret, "input_register_device(kbd)");
- goto error;
- }
- info->kbd = kbd;
-
- /* pointing device */
- ptr = input_allocate_device();
- if (!ptr)
- goto error_nomem;
- ptr->name = "Xen Virtual Pointer";
- ptr->phys = info->phys;
- ptr->id.bustype = BUS_PCI;
- ptr->id.vendor = 0x5853;
- ptr->id.product = 0xfffe;
- ptr->evbit[0] = BIT(EV_KEY) | BIT(EV_REL) | BIT(EV_ABS);
- for (i = BTN_LEFT; i <= BTN_TASK; i++)
- set_bit(i, ptr->keybit);
- ptr->relbit[0] = BIT(REL_X) | BIT(REL_Y);
- input_set_abs_params(ptr, ABS_X, 0, XENFB_WIDTH, 0, 0);
- input_set_abs_params(ptr, ABS_Y, 0, XENFB_HEIGHT, 0, 0);
-
- ret = input_register_device(ptr);
- if (ret) {
- input_free_device(ptr);
- xenbus_dev_fatal(dev, ret, "input_register_device(ptr)");
- goto error;
- }
- info->ptr = ptr;
-
- ret = xenkbd_connect_backend(dev, info);
- if (ret < 0)
- goto error;
-
- return 0;
-
- error_nomem:
- ret = -ENOMEM;
- xenbus_dev_fatal(dev, ret, "allocating device memory");
- error:
- xenkbd_remove(dev);
- return ret;
-}
-
-static int xenkbd_resume(struct xenbus_device *dev)
-{
- struct xenkbd_info *info = dev->dev.driver_data;
-
- xenkbd_disconnect_backend(info);
- memset(info->page, 0, PAGE_SIZE);
- return xenkbd_connect_backend(dev, info);
-}
-
-static int xenkbd_remove(struct xenbus_device *dev)
-{
- struct xenkbd_info *info = dev->dev.driver_data;
-
- xenkbd_disconnect_backend(info);
- if (info->kbd)
- input_unregister_device(info->kbd);
- if (info->ptr)
- input_unregister_device(info->ptr);
- free_page((unsigned long)info->page);
- kfree(info);
- return 0;
-}
-
-static int xenkbd_connect_backend(struct xenbus_device *dev,
- struct xenkbd_info *info)
-{
- int ret, evtchn;
- struct xenbus_transaction xbt;
-
- ret = xenbus_alloc_evtchn(dev, &evtchn);
- if (ret)
- return ret;
- ret = bind_evtchn_to_irqhandler(evtchn, input_handler,
- 0, dev->devicetype, info);
- if (ret < 0) {
- xenbus_free_evtchn(dev, evtchn);
- xenbus_dev_fatal(dev, ret, "bind_evtchn_to_irqhandler");
- return ret;
- }
- info->irq = ret;
-
- again:
- ret = xenbus_transaction_start(&xbt);
- if (ret) {
- xenbus_dev_fatal(dev, ret, "starting transaction");
- return ret;
- }
- ret = xenbus_printf(xbt, dev->nodename, "page-ref", "%lu",
- virt_to_mfn(info->page));
- if (ret)
- goto error_xenbus;
- ret = xenbus_printf(xbt, dev->nodename, "event-channel", "%u",
- evtchn);
- if (ret)
- goto error_xenbus;
- ret = xenbus_transaction_end(xbt, 0);
- if (ret) {
- if (ret == -EAGAIN)
- goto again;
- xenbus_dev_fatal(dev, ret, "completing transaction");
- return ret;
- }
-
- xenbus_switch_state(dev, XenbusStateInitialised);
- return 0;
-
- error_xenbus:
- xenbus_transaction_end(xbt, 1);
- xenbus_dev_fatal(dev, ret, "writing xenstore");
- return ret;
-}
-
-static void xenkbd_disconnect_backend(struct xenkbd_info *info)
-{
- if (info->irq >= 0)
- unbind_from_irqhandler(info->irq, info);
- info->irq = -1;
-}
-
-static void xenkbd_backend_changed(struct xenbus_device *dev,
- enum xenbus_state backend_state)
-{
- struct xenkbd_info *info = dev->dev.driver_data;
- int ret, val;
-
- switch (backend_state) {
- case XenbusStateInitialising:
- case XenbusStateInitialised:
- case XenbusStateUnknown:
- case XenbusStateClosed:
- break;
-
- case XenbusStateInitWait:
-InitWait:
- ret = xenbus_scanf(XBT_NIL, info->xbdev->otherend,
- "feature-abs-pointer", "%d", &val);
- if (ret < 0)
- val = 0;
- if (val) {
- ret = xenbus_printf(XBT_NIL, info->xbdev->nodename,
- "request-abs-pointer", "1");
- if (ret)
- printk(KERN_WARNING
- "xenkbd: can't request abs-pointer");
- }
- xenbus_switch_state(dev, XenbusStateConnected);
- break;
-
- case XenbusStateConnected:
- /*
- * Work around xenbus race condition: If backend goes
- * through InitWait to Connected fast enough, we can
- * get Connected twice here.
- */
- if (dev->state != XenbusStateConnected)
- goto InitWait; /* no InitWait seen yet, fudge it */
- break;
-
- case XenbusStateClosing:
- xenbus_frontend_closed(dev);
- break;
- }
-}
-
-static struct xenbus_device_id xenkbd_ids[] = {
- { "vkbd" },
- { "" }
-};
-
-static struct xenbus_driver xenkbd = {
- .name = "vkbd",
- .owner = THIS_MODULE,
- .ids = xenkbd_ids,
- .probe = xenkbd_probe,
- .remove = xenkbd_remove,
- .resume = xenkbd_resume,
- .otherend_changed = xenkbd_backend_changed,
-};
-
-static int __init xenkbd_init(void)
-{
- if (!is_running_on_xen())
- return -ENODEV;
-
- /* Nothing to do if running in dom0. */
- if (is_initial_xendomain())
- return -ENODEV;
-
- return xenbus_register_frontend(&xenkbd);
-}
-
-static void __exit xenkbd_cleanup(void)
-{
- xenbus_unregister_driver(&xenkbd);
-}
-
-module_init(xenkbd_init);
-module_exit(xenkbd_cleanup);
-
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-14 03:02:47 +0000