156 lines
3.3 KiB
C
156 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 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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