92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
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/*
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* Copyright (C) 2023 Daniele Lacamera <root@danielinux.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FRAMEBUFFER_INCLUDED
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#define FRAMEBUFFER_INCLUDED
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#include <stdint.h>
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struct fb_ops;
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struct fb_info {
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struct fb_var_screeninfo var; /* Current var */
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//struct fb_fix_screeninfo fix; /* Current fix */
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struct fb_videomode *mode; /* current mode */
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//struct backlight_device *bl_dev;
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struct fb_ops *fbops;
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struct device *dev; /* This is this fb device */
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uint8_t *screen_buffer; /* Framebuffer address */
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};
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struct fb_ops {
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/* open/release and usage marking */
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int (*fb_open)(struct fb_info *info);
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int (*fb_release)(struct fb_info *info);
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/* checks var and eventually tweaks it to something supported,
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* DO NOT MODIFY PAR */
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int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
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/* set the video mode according to info->var */
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int (*fb_set_par)(struct fb_info *info);
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/* set color registers in batch */
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int (*fb_setcmap)(uint32_t *cmap, struct fb_info *info);
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/* blank display */
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int (*fb_blank)(struct fb_info *info);
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/* Draws a rectangle */
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//void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
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/* Copy data from area to another */
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//void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
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/* Draws a image to the display */
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//void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
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/* Draws cursor */
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//int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
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/* Rotates the display */
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//void (*fb_rotate)(struct fb_info *info, int angle);
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/* perform fb specific ioctl (optional) */
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int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, unsigned long arg);
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/* teardown any resources to do with this framebuffer */
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void (*fb_destroy)(struct fb_info *info);
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};
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#ifdef CONFIG_DEVFRAMEBUFFER
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/* low-level drivers must call this register function first */
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int register_framebuffer(struct fb_info *fb_info);
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/* Higher level drivers may access fb screen directly */
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unsigned char *framebuffer_get(void);
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int framebuffer_setcmap(uint32_t *cmap);
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/* kernel init */
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int fb_init(void);
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#else
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# define register_framebuffer(...) ((-ENOENT))
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# define fb_init() ((-ENOENT))
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#endif
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#endif
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