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8a48ac3393
Now that the fbops member of struct fb_info is const, we can start making the ops const as well. This does not cover all drivers; some actually modify the fbops struct, for example to adjust for different configurations, and others do more involved things that I'd rather not touch in practically obsolete drivers. Mostly this is the low hanging fruit where we can add "const" and be done with it. v3: - un-constify atyfb, mb862xx, nvidia and uvesabf (0day) v2: - fix typo (Christophe de Dinechin) - use "static const" instead of "const static" in mx3fb.c - also constify smscufx.c Cc: linux-fbdev@vger.kernel.org Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/ce67f14435f3af498f2e8bf35ce4be11f7504132.1575390740.git.jani.nikula@intel.com
155 lines
3.3 KiB
C
155 lines
3.3 KiB
C
/*
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* linux/drivers/video/q40fb.c -- Q40 frame buffer device
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*
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* Copyright (C) 2001
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*
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* Richard Zidlicky <rz@linux-m68k.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/uaccess.h>
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#include <asm/setup.h>
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#include <asm/q40_master.h>
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#include <linux/fb.h>
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#include <linux/module.h>
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#include <asm/pgtable.h>
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#define Q40_PHYS_SCREEN_ADDR 0xFE800000
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static struct fb_fix_screeninfo q40fb_fix = {
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.id = "Q40",
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.smem_len = 1024*1024,
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.type = FB_TYPE_PACKED_PIXELS,
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.visual = FB_VISUAL_TRUECOLOR,
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.line_length = 1024*2,
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.accel = FB_ACCEL_NONE,
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};
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static const struct fb_var_screeninfo q40fb_var = {
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.xres = 1024,
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.yres = 512,
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.xres_virtual = 1024,
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.yres_virtual = 512,
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.bits_per_pixel = 16,
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.red = {6, 5, 0},
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.green = {11, 5, 0},
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.blue = {0, 6, 0},
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.activate = FB_ACTIVATE_NOW,
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.height = 230,
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.width = 300,
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.vmode = FB_VMODE_NONINTERLACED,
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};
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static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
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unsigned blue, unsigned transp,
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struct fb_info *info)
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{
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/*
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* Set a single color register. The values supplied have a 16 bit
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* magnitude.
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* Return != 0 for invalid regno.
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*/
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if (regno > 255)
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return 1;
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red>>=11;
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green>>=11;
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blue>>=10;
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if (regno < 16) {
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((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
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((green & 31) << 11) |
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(blue & 63);
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}
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return 0;
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}
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static const struct fb_ops q40fb_ops = {
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.owner = THIS_MODULE,
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.fb_setcolreg = q40fb_setcolreg,
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.fb_fillrect = cfb_fillrect,
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.fb_copyarea = cfb_copyarea,
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.fb_imageblit = cfb_imageblit,
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};
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static int q40fb_probe(struct platform_device *dev)
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{
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struct fb_info *info;
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if (!MACH_IS_Q40)
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return -ENXIO;
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/* mapped in q40/config.c */
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q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
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info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
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if (!info)
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return -ENOMEM;
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info->var = q40fb_var;
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info->fix = q40fb_fix;
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info->fbops = &q40fb_ops;
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info->flags = FBINFO_DEFAULT; /* not as module for now */
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info->pseudo_palette = info->par;
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info->par = NULL;
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info->screen_base = (char *) q40fb_fix.smem_start;
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if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
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framebuffer_release(info);
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return -ENOMEM;
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}
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master_outb(3, DISPLAY_CONTROL_REG);
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if (register_framebuffer(info) < 0) {
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printk(KERN_ERR "Unable to register Q40 frame buffer\n");
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fb_dealloc_cmap(&info->cmap);
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framebuffer_release(info);
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return -EINVAL;
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}
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fb_info(info, "Q40 frame buffer alive and kicking !\n");
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return 0;
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}
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static struct platform_driver q40fb_driver = {
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.probe = q40fb_probe,
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.driver = {
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.name = "q40fb",
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},
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};
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static struct platform_device q40fb_device = {
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.name = "q40fb",
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};
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int __init q40fb_init(void)
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{
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int ret = 0;
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if (fb_get_options("q40fb", NULL))
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return -ENODEV;
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ret = platform_driver_register(&q40fb_driver);
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if (!ret) {
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ret = platform_device_register(&q40fb_device);
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if (ret)
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platform_driver_unregister(&q40fb_driver);
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}
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return ret;
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}
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module_init(q40fb_init);
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MODULE_LICENSE("GPL");
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