2 * Copyright (C) 2012 Red Hat
4 * based in parts on udlfb.c:
5 * Copyright (C) 2009 Roberto De Ioris <roberto@unbit.it>
6 * Copyright (C) 2009 Jaya Kumar <jayakumar.lkml@gmail.com>
7 * Copyright (C) 2009 Bernie Thompson <bernie@plugable.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License v2. See the file COPYING in the main directory of this archive for
17 #include <linux/usb.h>
19 #define DRIVER_NAME "udl"
20 #define DRIVER_DESC "DisplayLink"
21 #define DRIVER_DATE "20120220"
23 #define DRIVER_MAJOR 0
24 #define DRIVER_MINOR 0
25 #define DRIVER_PATCHLEVEL 1
30 struct list_head entry;
31 struct udl_device *dev;
32 struct delayed_work release_urb_work;
37 struct list_head list;
39 struct semaphore limit_sem;
49 struct drm_device *ddev;
54 atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
56 struct udl_fbdev *fbdev;
58 uint32_t mode_buf_len;
59 atomic_t bytes_rendered; /* raw pixel-bytes driver asked to render */
60 atomic_t bytes_identical; /* saved effort with backbuffer comparison */
61 atomic_t bytes_sent; /* to usb, after compression including overhead */
62 atomic_t cpu_kcycles_used; /* transpired during pixel processing */
65 struct udl_gem_object {
66 struct drm_gem_object base;
72 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
74 struct udl_framebuffer {
75 struct drm_framebuffer base;
76 struct udl_gem_object *obj;
77 bool active_16; /* active on the 16-bit channel */
80 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
83 int udl_modeset_init(struct drm_device *dev);
84 void udl_modeset_cleanup(struct drm_device *dev);
85 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
87 struct drm_encoder *udl_encoder_init(struct drm_device *dev);
89 struct urb *udl_get_urb(struct drm_device *dev);
91 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
92 void udl_urb_completion(struct urb *urb);
94 int udl_driver_load(struct drm_device *dev, unsigned long flags);
95 int udl_driver_unload(struct drm_device *dev);
97 int udl_fbdev_init(struct drm_device *dev);
98 void udl_fbdev_cleanup(struct drm_device *dev);
99 void udl_fbdev_unplug(struct drm_device *dev);
100 struct drm_framebuffer *
101 udl_fb_user_fb_create(struct drm_device *dev,
102 struct drm_file *file,
103 struct drm_mode_fb_cmd2 *mode_cmd);
105 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
106 const char *front, char **urb_buf_ptr,
107 u32 byte_offset, u32 byte_width,
108 int *ident_ptr, int *sent_ptr);
110 int udl_dumb_create(struct drm_file *file_priv,
111 struct drm_device *dev,
112 struct drm_mode_create_dumb *args);
113 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
114 uint32_t handle, uint64_t *offset);
115 int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
118 int udl_gem_init_object(struct drm_gem_object *obj);
119 void udl_gem_free_object(struct drm_gem_object *gem_obj);
120 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
122 struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
123 struct dma_buf *dma_buf);
125 int udl_gem_vmap(struct udl_gem_object *obj);
126 void udl_gem_vunmap(struct udl_gem_object *obj);
127 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
128 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
130 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
131 int width, int height);
133 int udl_drop_usb(struct drm_device *dev);
135 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */
136 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */
137 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */
138 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */
140 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */
141 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */
142 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
143 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */