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 22 struct 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 32 struct udl_device; 33 34 struct 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 41 struct 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 50 struct 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 */ 70 int udl_modeset_init(struct drm_device *dev); 71 struct drm_connector *udl_connector_init(struct drm_device *dev); 72 73 struct urb *udl_get_urb(struct drm_device *dev); 74 75 int udl_submit_urb(struct drm_device *dev, struct urb *urb, size_t len); 76 void udl_urb_completion(struct urb *urb); 77 78 int udl_init(struct udl_device *udl); 79 80 int 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 84 int 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 106