1/*
  2 * Copyright (C) 2012 Red Hat
  3 *
  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>
  8 *
  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
 11 * more details.
 12 */
 13
 14#ifndef UDL_DRV_H
 15#define UDL_DRV_H
 16
 17#include <linux/usb.h>
 18
 19#define DRIVER_NAME		"udl"
 20#define DRIVER_DESC		"DisplayLink"
 21#define DRIVER_DATE		"20120220"
 22
 23#define DRIVER_MAJOR		0
 24#define DRIVER_MINOR		0
 25#define DRIVER_PATCHLEVEL	1
 26
 27struct udl_device;
 28
 29struct urb_node {
 30	struct list_head entry;
 31	struct udl_device *dev;
 32	struct delayed_work release_urb_work;
 33	struct urb *urb;
 34};
 35
 36struct urb_list {
 37	struct list_head list;
 38	spinlock_t lock;
 39	struct semaphore limit_sem;
 40	int available;
 41	int count;
 42	size_t size;
 43};
 44
 45struct udl_fbdev;
 46
 47struct udl_device {
 48	struct device *dev;
 49	struct drm_device *ddev;
 50
 51	int sku_pixel_limit;
 52
 53	struct urb_list urbs;
 54	atomic_t lost_pixels; /* 1 = a render op failed. Need screen refresh */
 55
 56	struct udl_fbdev *fbdev;
 57	char mode_buf[1024];
 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 */
 63};
 64
 65struct udl_gem_object {
 66	struct drm_gem_object base;
 67	struct page **pages;
 68	void *vmapping;
 69	struct sg_table *sg;
 70};
 71
 72#define to_udl_bo(x) container_of(x, struct udl_gem_object, base)
 73
 74struct udl_framebuffer {
 75	struct drm_framebuffer base;
 76	struct udl_gem_object *obj;
 77	bool active_16; /* active on the 16-bit channel */
 78	int x1, y1, x2, y2; /* dirty rect */
 79	spinlock_t dirty_lock;
 80};
 81
 82#define to_udl_fb(x) container_of(x, struct udl_framebuffer, base)
 83
 84/* modeset */
 85int udl_modeset_init(struct drm_device *dev);
 86void udl_modeset_cleanup(struct drm_device *dev);
 87int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder);
 88
 89struct drm_encoder *udl_encoder_init(struct drm_device *dev);
 90
 91struct urb *udl_get_urb(struct drm_device *dev);
 92
 93int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len);
 94void udl_urb_completion(struct urb *urb);
 95
 96int udl_driver_load(struct drm_device *dev, unsigned long flags);
 97int udl_driver_unload(struct drm_device *dev);
 98
 99int udl_fbdev_init(struct drm_device *dev);
100void udl_fbdev_cleanup(struct drm_device *dev);
101void udl_fbdev_unplug(struct drm_device *dev);
102struct drm_framebuffer *
103udl_fb_user_fb_create(struct drm_device *dev,
104		      struct drm_file *file,
105		      struct drm_mode_fb_cmd2 *mode_cmd);
106
107int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr,
108		     const char *front, char **urb_buf_ptr,
109		     u32 byte_offset, u32 device_byte_offset, u32 byte_width,
110		     int *ident_ptr, int *sent_ptr);
111
112int udl_dumb_create(struct drm_file *file_priv,
113		    struct drm_device *dev,
114		    struct drm_mode_create_dumb *args);
115int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev,
116		 uint32_t handle, uint64_t *offset);
117
118void udl_gem_free_object(struct drm_gem_object *gem_obj);
119struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev,
120					    size_t size);
121struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev,
122				struct dma_buf *dma_buf);
123
124int udl_gem_vmap(struct udl_gem_object *obj);
125void udl_gem_vunmap(struct udl_gem_object *obj);
126int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
127int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
128
129int udl_handle_damage(struct udl_framebuffer *fb, int x, int y,
130		      int width, int height);
131
132int udl_drop_usb(struct drm_device *dev);
133
134#define CMD_WRITE_RAW8   "\xAF\x60" /**< 8 bit raw write command. */
135#define CMD_WRITE_RL8    "\xAF\x61" /**< 8 bit run length command. */
136#define CMD_WRITE_COPY8  "\xAF\x62" /**< 8 bit copy command. */
137#define CMD_WRITE_RLX8   "\xAF\x63" /**< 8 bit extended run length command. */
138
139#define CMD_WRITE_RAW16  "\xAF\x68" /**< 16 bit raw write command. */
140#define CMD_WRITE_RL16   "\xAF\x69" /**< 16 bit run length command. */
141#define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */
142#define CMD_WRITE_RLX16  "\xAF\x6B" /**< 16 bit extended run length command. */
143
144#endif