1 /* 2 * Video uclass and legacy implementation 3 * 4 * Copyright (c) 2015 Google, Inc 5 * 6 * MPC823 Video Controller 7 * ======================= 8 * (C) 2000 by Paolo Scaffardi (arsenio@tin.it) 9 * AIRVENT SAM s.p.a - RIMINI(ITALY) 10 * 11 */ 12 13 #ifndef _VIDEO_H_ 14 #define _VIDEO_H_ 15 16 #ifdef CONFIG_DM_VIDEO 17 18 #include <stdio_dev.h> 19 20 struct video_uc_platdata { 21 uint align; 22 uint size; 23 ulong base; 24 }; 25 26 /* 27 * Bits per pixel selector. Each value n is such that the bits-per-pixel is 28 * 2 ^ n 29 */ 30 enum video_log2_bpp { 31 VIDEO_BPP1 = 0, 32 VIDEO_BPP2, 33 VIDEO_BPP4, 34 VIDEO_BPP8, 35 VIDEO_BPP16, 36 VIDEO_BPP32, 37 }; 38 39 /* 40 * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer 41 * brackets to allow multiplication by fractional pixels. 42 */ 43 #define VNBYTES(bpix) (1 << (bpix)) / 8 44 45 #define VNBITS(bpix) (1 << (bpix)) 46 47 /** 48 * struct video_priv - Device information used by the video uclass 49 * 50 * @xsize: Number of pixel columns (e.g. 1366) 51 * @ysize: Number of pixels rows (e.g.. 768) 52 * @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.) 53 * @bpix: Encoded bits per pixel 54 * @vidconsole_drv_name: Driver to use for the text console, NULL to 55 * select automatically 56 * @font_size: Font size in pixels (0 to use a default value) 57 * @fb: Frame buffer 58 * @fb_size: Frame buffer size 59 * @line_length: Length of each frame buffer line, in bytes 60 * @colour_fg: Foreground colour (pixel value) 61 * @colour_bg: Background colour (pixel value) 62 * @flush_dcache: true to enable flushing of the data cache after 63 * the LCD is updated 64 * @cmap: Colour map for 8-bit-per-pixel displays 65 */ 66 struct video_priv { 67 /* Things set up by the driver: */ 68 ushort xsize; 69 ushort ysize; 70 ushort rot; 71 enum video_log2_bpp bpix; 72 const char *vidconsole_drv_name; 73 int font_size; 74 75 /* 76 * Things that are private to the uclass: don't use these in the 77 * driver 78 */ 79 void *fb; 80 int fb_size; 81 int line_length; 82 int colour_fg; 83 int colour_bg; 84 bool flush_dcache; 85 ushort *cmap; 86 }; 87 88 /* Placeholder - there are no video operations at present */ 89 struct video_ops { 90 }; 91 92 #define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops) 93 94 /** 95 * video_reserve() - Reserve frame-buffer memory for video devices 96 * 97 * Note: This function is for internal use. 98 * 99 * This uses the uclass platdata's @size and @align members to figure out 100 * a size and position for each frame buffer as part of the pre-relocation 101 * process of determining the post-relocation memory layout. 102 * 103 * gd->video_top is set to the initial value of *@addrp and gd->video_bottom 104 * is set to the final value. 105 * 106 * @addrp: On entry, the top of available memory. On exit, the new top, 107 * after allocating the required memory. 108 * @return 0 109 */ 110 int video_reserve(ulong *addrp); 111 112 /** 113 * video_sync() - Sync a device's frame buffer with its hardware 114 * 115 * Some frame buffers are cached or have a secondary frame buffer. This 116 * function syncs these up so that the current contents of the U-Boot frame 117 * buffer are displayed to the user. 118 * 119 * @dev: Device to sync 120 */ 121 void video_sync(struct udevice *vid); 122 123 /** 124 * video_sync_all() - Sync all devices' frame buffers with there hardware 125 * 126 * This calls video_sync() on all active video devices. 127 */ 128 void video_sync_all(void); 129 130 /** 131 * video_bmp_display() - Display a BMP file 132 * 133 * @dev: Device to display the bitmap on 134 * @bmp_image: Address of bitmap image to display 135 * @x: X position in pixels from the left 136 * @y: Y position in pixels from the top 137 * @align: true to adjust the coordinates to centre the image. If false 138 * the coordinates are used as is. If true: 139 * 140 * - if a coordinate is 0x7fff then the image will be centred in 141 * that direction 142 * - if a coordinate is -ve then it will be offset to the 143 * left/top of the centre by that many pixels 144 * - if a coordinate is positive it will be used unchnaged. 145 * @return 0 if OK, -ve on error 146 */ 147 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y, 148 bool align); 149 150 /** 151 * video_get_xsize() - Get the width of the display in pixels 152 * 153 * @dev: Device to check 154 * @return device frame buffer width in pixels 155 */ 156 int video_get_xsize(struct udevice *dev); 157 158 /** 159 * video_get_ysize() - Get the height of the display in pixels 160 * 161 * @dev: Device to check 162 * @return device frame buffer height in pixels 163 */ 164 int video_get_ysize(struct udevice *dev); 165 166 /** 167 * Set whether we need to flush the dcache when changing the image. This 168 * defaults to off. 169 * 170 * @param flush non-zero to flush cache after update, 0 to skip 171 */ 172 void video_set_flush_dcache(struct udevice *dev, bool flush); 173 174 #endif /* CONFIG_DM_VIDEO */ 175 176 #ifndef CONFIG_DM_VIDEO 177 178 /* Video functions */ 179 180 struct stdio_dev; 181 182 int video_init(void *videobase); 183 void video_putc(struct stdio_dev *dev, const char c); 184 void video_puts(struct stdio_dev *dev, const char *s); 185 186 /** 187 * Display a BMP format bitmap on the screen 188 * 189 * @param bmp_image Address of BMP image 190 * @param x X position to draw image 191 * @param y Y position to draw image 192 */ 193 int video_display_bitmap(ulong bmp_image, int x, int y); 194 195 /** 196 * Get the width of the screen in pixels 197 * 198 * @return width of screen in pixels 199 */ 200 int video_get_pixel_width(void); 201 202 /** 203 * Get the height of the screen in pixels 204 * 205 * @return height of screen in pixels 206 */ 207 int video_get_pixel_height(void); 208 209 /** 210 * Get the number of text lines/rows on the screen 211 * 212 * @return number of rows 213 */ 214 int video_get_screen_rows(void); 215 216 /** 217 * Get the number of text columns on the screen 218 * 219 * @return number of columns 220 */ 221 int video_get_screen_columns(void); 222 223 /** 224 * Set the position of the text cursor 225 * 226 * @param col Column to place cursor (0 = left side) 227 * @param row Row to place cursor (0 = top line) 228 */ 229 void video_position_cursor(unsigned col, unsigned row); 230 231 /* Clear the display */ 232 void video_clear(void); 233 234 #if defined(CONFIG_FORMIKE) 235 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs, 236 unsigned int max_hz, unsigned int spi_mode); 237 #endif 238 #if defined(CONFIG_LG4573) 239 int lg4573_spi_startup(unsigned int bus, unsigned int cs, 240 unsigned int max_hz, unsigned int spi_mode); 241 #endif 242 243 #endif /* CONFIG_DM_VIDEO */ 244 245 #endif 246