2 * linux/drivers/video/q40fb.c -- Q40 frame buffer device
6 * Richard Zidlicky <rz@linux-m68k.org>
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file COPYING in the main directory of this archive for
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
17 #include <linux/delay.h>
18 #include <linux/interrupt.h>
19 #include <linux/platform_device.h>
21 #include <linux/uaccess.h>
22 #include <asm/setup.h>
23 #include <asm/q40_master.h>
25 #include <linux/module.h>
27 #define Q40_PHYS_SCREEN_ADDR 0xFE800000
29 static struct fb_fix_screeninfo q40fb_fix = {
31 .smem_len = 1024*1024,
32 .type = FB_TYPE_PACKED_PIXELS,
33 .visual = FB_VISUAL_TRUECOLOR,
34 .line_length = 1024*2,
35 .accel = FB_ACCEL_NONE,
38 static const struct fb_var_screeninfo q40fb_var = {
47 .activate = FB_ACTIVATE_NOW,
50 .vmode = FB_VMODE_NONINTERLACED,
53 static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
54 unsigned blue, unsigned transp,
58 * Set a single color register. The values supplied have a 16 bit
60 * Return != 0 for invalid regno.
70 ((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
71 ((green & 31) << 11) |
77 static const struct fb_ops q40fb_ops = {
80 .fb_setcolreg = q40fb_setcolreg,
83 static int q40fb_probe(struct platform_device *dev)
90 /* mapped in q40/config.c */
91 q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
93 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
97 info->var = q40fb_var;
98 info->fix = q40fb_fix;
99 info->fbops = &q40fb_ops;
100 info->pseudo_palette = info->par;
102 info->screen_base = (char *) q40fb_fix.smem_start;
104 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
105 framebuffer_release(info);
109 master_outb(3, DISPLAY_CONTROL_REG);
111 if (register_framebuffer(info) < 0) {
112 printk(KERN_ERR "Unable to register Q40 frame buffer\n");
113 fb_dealloc_cmap(&info->cmap);
114 framebuffer_release(info);
118 fb_info(info, "Q40 frame buffer alive and kicking !\n");
122 static struct platform_driver q40fb_driver = {
123 .probe = q40fb_probe,
129 static struct platform_device q40fb_device = {
133 static int __init q40fb_init(void)
137 if (fb_get_options("q40fb", NULL))
140 ret = platform_driver_register(&q40fb_driver);
143 ret = platform_device_register(&q40fb_device);
145 platform_driver_unregister(&q40fb_driver);
150 module_init(q40fb_init);
151 MODULE_LICENSE("GPL");