diff options
Diffstat (limited to 'drivers/gpu/drm/udl/udl_drv.c')
| -rw-r--r-- | drivers/gpu/drm/udl/udl_drv.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c new file mode 100644 index 000000000..f28703db8 --- /dev/null +++ b/drivers/gpu/drm/udl/udl_drv.c @@ -0,0 +1,174 @@ +/* + * Copyright (C) 2012 Red Hat + * + * This file is subject to the terms and conditions of the GNU General Public + * License v2. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/module.h> +#include <drm/drmP.h> +#include <drm/drm_crtc_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); +} + +/* + * 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"); |