1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 * Copyright (C) 2012 Red Hat
  4 *
  5 * based in parts on udlfb.c:
  6 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
  7 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
  8 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
  9 */
 10
 11#ifndef UDL_DRV_H
 12#define UDL_DRV_H
 13
 14#include <linux/mm_types.h>
 15#include <linux/usb.h>
 16
 17#include <drm/drm_device.h>
 18#include <drm/drm_framebuffer.h>
 19#include <drm/drm_gem.h>
 20#include <drm/drm_simple_kms_helper.h>
 21
 22struct drm_mode_create_dumb;
 23
 24#define DRIVER_NAME		"udl"
 25#define DRIVER_DESC		"DisplayLink"
 26#define DRIVER_DATE		"20120220"
 27
 28#define DRIVER_MAJOR		0
 29#define DRIVER_MINOR		0
 30#define DRIVER_PATCHLEVEL	1
 31
 32struct udl_device;
 33
 34struct urb_node {
 35	struct list_head entry;
 36	struct udl_device *dev;
 37	struct delayed_work release_urb_work;
 38	struct urb *urb;
 39};
 40
 41struct urb_list {
 42	struct list_head list;
 43	spinlock_t lock;
 44	struct semaphore limit_sem;
 45	int available;
 46	int count;
 47	size_t size;
 48};
 49
 50struct udl_device {
 51	struct drm_device drm;
 52	struct device *dev;
 53	struct usb_device *udev;
 54
 55	struct drm_simple_display_pipe display_pipe;
 56
 57	struct mutex gem_lock;
 58
 59	int sku_pixel_limit;
 60
 61	struct urb_list urbs;
 62
 63	char mode_buf[1024];
 64	uint32_t mode_buf_len;
 65};
 66
 67#define to_udl(x) container_of(x, struct udl_device, drm)
 68
 69/* modeset */
 70int udl_modeset_init(struct drm_device *dev);
 71struct drm_connector *udl_connector_init(struct drm_device *dev);
 72
 73struct urb *udl_get_urb(struct drm_device *dev);
 74
 75int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
 76void udl_urb_completion(struct urb *urb);
 77
 78int udl_init(struct udl_device *udl);
 79
 80int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
 81		     const char *front, char **urb_buf_ptr,
 82		     u32 byte_offset, u32 device_byte_offset, u32 byte_width);
 83
 84int udl_drop_usb(struct drm_device *dev);
 85
 86#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
 87#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
 88#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
 89#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
 90
 91#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
 92#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
 93#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
 94#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
 95
 96/* On/Off for driving the DisplayLink framebuffer to the display */
 97#define UDL_REG_BLANK_MODE		0x1f
 98
 99#define UDL_BLANK_MODE_ON		0x00 /* hsync and vsync on, visible */
100#define UDL_BLANK_MODE_BLANKED		0x01 /* hsync and vsync on, blanked */
101#define UDL_BLANK_MODE_VSYNC_OFF	0x03 /* vsync off, blanked */
102#define UDL_BLANK_MODE_HSYNC_OFF	0x05 /* hsync off, blanked */
103#define UDL_BLANK_MODE_POWERDOWN	0x07 /* powered off; requires modeset */
104
105#endif