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 27 struct udl_device; 28 29 struct 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 36 struct 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 45 struct udl_fbdev; 46 47 struct 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 65 struct udl_gem_object { 66 struct drm_gem_object base; 67 struct page **pages; 68 void *vmapping; 69 }; 70 71 #define to_udl_bo(x) container_of(x, struct udl_gem_object, base) 72 73 struct udl_framebuffer { 74 struct drm_framebuffer base; 75 struct udl_gem_object *obj; 76 bool active_16; /* active on the 16-bit channel */ 77 }; 78 79 #define to_udl_fb(x) container_of(x, struct udl_framebuffer, base) 80 81 /* modeset */ 82 int udl_modeset_init(struct drm_device *dev); 83 void udl_modeset_cleanup(struct drm_device *dev); 84 int udl_connector_init(struct drm_device *dev, struct drm_encoder *encoder); 85 86 struct drm_encoder *udl_encoder_init(struct drm_device *dev); 87 88 struct urb *udl_get_urb(struct drm_device *dev); 89 90 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len); 91 void udl_urb_completion(struct urb *urb); 92 93 int udl_driver_load(struct drm_device *dev, unsigned long flags); 94 int udl_driver_unload(struct drm_device *dev); 95 96 int udl_fbdev_init(struct drm_device *dev); 97 void udl_fbdev_cleanup(struct drm_device *dev); 98 void udl_fbdev_unplug(struct drm_device *dev); 99 struct drm_framebuffer * 100 udl_fb_user_fb_create(struct drm_device *dev, 101 struct drm_file *file, 102 struct drm_mode_fb_cmd2 *mode_cmd); 103 104 int udl_render_hline(struct drm_device *dev, int bpp, struct urb **urb_ptr, 105 const char *front, char **urb_buf_ptr, 106 u32 byte_offset, u32 byte_width, 107 int *ident_ptr, int *sent_ptr); 108 109 int udl_dumb_create(struct drm_file *file_priv, 110 struct drm_device *dev, 111 struct drm_mode_create_dumb *args); 112 int udl_gem_mmap(struct drm_file *file_priv, struct drm_device *dev, 113 uint32_t handle, uint64_t *offset); 114 int udl_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev, 115 uint32_t handle); 116 117 int udl_gem_init_object(struct drm_gem_object *obj); 118 void udl_gem_free_object(struct drm_gem_object *gem_obj); 119 struct udl_gem_object *udl_gem_alloc_object(struct drm_device *dev, 120 size_t size); 121 122 int udl_gem_vmap(struct udl_gem_object *obj); 123 void udl_gem_vunmap(struct udl_gem_object *obj); 124 int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); 125 int udl_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf); 126 127 int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, 128 int width, int height); 129 130 int udl_drop_usb(struct drm_device *dev); 131 132 #define CMD_WRITE_RAW8 "\xAF\x60" /**< 8 bit raw write command. */ 133 #define CMD_WRITE_RL8 "\xAF\x61" /**< 8 bit run length command. */ 134 #define CMD_WRITE_COPY8 "\xAF\x62" /**< 8 bit copy command. */ 135 #define CMD_WRITE_RLX8 "\xAF\x63" /**< 8 bit extended run length command. */ 136 137 #define CMD_WRITE_RAW16 "\xAF\x68" /**< 16 bit raw write command. */ 138 #define CMD_WRITE_RL16 "\xAF\x69" /**< 16 bit run length command. */ 139 #define CMD_WRITE_COPY16 "\xAF\x6A" /**< 16 bit copy command. */ 140 #define CMD_WRITE_RLX16 "\xAF\x6B" /**< 16 bit extended run length command. */ 141 142 #endif 143