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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2012 Red Hat
*/
#include <linux/module.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_probe_helper.h>
#include "udl_drv.h"
static int udl_usb_suspend(struct usb_interface *interface,
pm_message_t message)
{
struct drm_device *dev = usb_get_intfdata(interface);
drm_kms_helper_poll_disable(dev);
return 0;
}
static int udl_usb_resume(struct usb_interface *interface)
{
struct drm_device *dev = usb_get_intfdata(interface);
drm_kms_helper_poll_enable(dev);
udl_modeset_restore(dev);
return 0;
}
static const struct vm_operations_struct udl_gem_vm_ops = {
.fault = udl_gem_fault,
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static const struct file_operations udl_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = udl_drm_gem_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,
.release = drm_release,
.compat_ioctl = drm_compat_ioctl,
.llseek = noop_llseek,
};
static void udl_driver_release(struct drm_device *dev)
{
udl_fini(dev);
udl_modeset_cleanup(dev);
drm_dev_fini(dev);
kfree(dev);
}
static struct drm_driver driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
.release = udl_driver_release,
/* gem hooks */
.gem_free_object_unlocked = udl_gem_free_object,
.gem_vm_ops = &udl_gem_vm_ops,
.dumb_create = udl_dumb_create,
.dumb_map_offset = udl_gem_mmap,
.fops = &udl_driver_fops,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = udl_gem_prime_export,
.gem_prime_import = udl_gem_prime_import,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
};
static struct udl_device *udl_driver_create(struct usb_interface *interface)
{
struct usb_device *udev = interface_to_usbdev(interface);
struct udl_device *udl;
int r;
udl = kzalloc(sizeof(*udl), GFP_KERNEL);
if (!udl)
return ERR_PTR(-ENOMEM);
r = drm_dev_init(&udl->drm, &driver, &interface->dev);
if (r) {
kfree(udl);
return ERR_PTR(r);
}
udl->udev = udev;
udl->drm.dev_private = udl;
r = udl_init(udl);
if (r) {
drm_dev_fini(&udl->drm);
kfree(udl);
return ERR_PTR(r);
}
usb_set_intfdata(interface, udl);
return udl;
}
static int udl_usb_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
int r;
struct udl_device *udl;
udl = udl_driver_create(interface);
if (IS_ERR(udl))
return PTR_ERR(udl);
r = drm_dev_register(&udl->drm, 0);
if (r)
goto err_free;
DRM_INFO("Initialized udl on minor %d\n", udl->drm.primary->index);
return 0;
err_free:
drm_dev_put(&udl->drm);
return r;
}
static void udl_usb_disconnect(struct usb_interface *interface)
{
struct drm_device *dev = usb_get_intfdata(interface);
drm_kms_helper_poll_disable(dev);
udl_fbdev_unplug(dev);
udl_drop_usb(dev);
drm_dev_unplug(dev);
drm_dev_put(dev);
}
/*
* There are many DisplayLink-based graphics products, all with unique PIDs.
* So we match on DisplayLink's VID + Vendor-Defined Interface Class (0xff)
* We also require a match on SubClass (0x00) and Protocol (0x00),
* which is compatible with all known USB 2.0 era graphics chips and firmware,
* but allows DisplayLink to increment those for any future incompatible chips
*/
static const struct usb_device_id id_table[] = {
{.idVendor = 0x17e9, .bInterfaceClass = 0xff,
.bInterfaceSubClass = 0x00,
.bInterfaceProtocol = 0x00,
.match_flags = USB_DEVICE_ID_MATCH_VENDOR |
USB_DEVICE_ID_MATCH_INT_CLASS |
USB_DEVICE_ID_MATCH_INT_SUBCLASS |
USB_DEVICE_ID_MATCH_INT_PROTOCOL,},
{},
};
MODULE_DEVICE_TABLE(usb, id_table);
static struct usb_driver udl_driver = {
.name = "udl",
.probe = udl_usb_probe,
.disconnect = udl_usb_disconnect,
.suspend = udl_usb_suspend,
.resume = udl_usb_resume,
.id_table = id_table,
};
module_usb_driver(udl_driver);
MODULE_LICENSE("GPL");
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