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 device *dmadev;
54	struct usb_device *udev;
55
56	struct drm_simple_display_pipe display_pipe;
57
58	struct mutex gem_lock;
59
60	int sku_pixel_limit;
61
62	struct urb_list urbs;
63
64	char mode_buf[1024];
65	uint32_t mode_buf_len;
66};
67
68#define to_udl(x) container_of(x, struct udl_device, drm)
69
70/* modeset */
71int udl_modeset_init(struct drm_device *dev);
72struct drm_connector *udl_connector_init(struct drm_device *dev);
73
74struct urb *udl_get_urb(struct drm_device *dev);
75
76int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
77void udl_urb_completion(struct urb *urb);
78
79int udl_init(struct udl_device *udl);
80
81int udl_render_hline(struct drm_device *dev, int log_bpp, struct urb **urb_ptr,
82		     const char *front, char **urb_buf_ptr,
83		     u32 byte_offset, u32 device_byte_offset, u32 byte_width);
84
85int udl_drop_usb(struct drm_device *dev);
86
87#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
88#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
89#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
90#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
91
92#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
93#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
94#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
95#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
96
97/* On/Off for driving the DisplayLink framebuffer to the display */
98#define UDL_REG_BLANK_MODE		0x1f
99
100#define UDL_BLANK_MODE_ON		0x00 /* hsync and vsync on, visible */
101#define UDL_BLANK_MODE_BLANKED		0x01 /* hsync and vsync on, blanked */
102#define UDL_BLANK_MODE_VSYNC_OFF	0x03 /* vsync off, blanked */
103#define UDL_BLANK_MODE_HSYNC_OFF	0x05 /* hsync off, blanked */
104#define UDL_BLANK_MODE_POWERDOWN	0x07 /* powered off; requires modeset */
105
106#endif
107