1 /*
2 * linux/drivers/video/q40fb.c -- Q40 frame buffer device
3 *
4 * Copyright (C) 2001
5 *
6 * Richard Zidlicky <rz@linux-m68k.org>
7 *
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
10 * more details.
11 */
12
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
16 #include <linux/mm.h>
17 #include <linux/delay.h>
18 #include <linux/interrupt.h>
19 #include <linux/platform_device.h>
20
21 #include <linux/uaccess.h>
22 #include <asm/setup.h>
23 #include <asm/q40_master.h>
24 #include <linux/fb.h>
25 #include <linux/module.h>
26
27 #define Q40_PHYS_SCREEN_ADDR 0xFE800000
28
29 static struct fb_fix_screeninfo q40fb_fix = {
30 .id = "Q40",
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,
36 };
37
38 static const struct fb_var_screeninfo q40fb_var = {
39 .xres = 1024,
40 .yres = 512,
41 .xres_virtual = 1024,
42 .yres_virtual = 512,
43 .bits_per_pixel = 16,
44 .red = {6, 5, 0},
45 .green = {11, 5, 0},
46 .blue = {0, 6, 0},
47 .activate = FB_ACTIVATE_NOW,
48 .height = 230,
49 .width = 300,
50 .vmode = FB_VMODE_NONINTERLACED,
51 };
52
q40fb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)53 static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
54 unsigned blue, unsigned transp,
55 struct fb_info *info)
56 {
57 /*
58 * Set a single color register. The values supplied have a 16 bit
59 * magnitude.
60 * Return != 0 for invalid regno.
61 */
62
63 if (regno > 255)
64 return 1;
65 red>>=11;
66 green>>=11;
67 blue>>=10;
68
69 if (regno < 16) {
70 ((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
71 ((green & 31) << 11) |
72 (blue & 63);
73 }
74 return 0;
75 }
76
77 static const struct fb_ops q40fb_ops = {
78 .owner = THIS_MODULE,
79 .fb_setcolreg = q40fb_setcolreg,
80 .fb_fillrect = cfb_fillrect,
81 .fb_copyarea = cfb_copyarea,
82 .fb_imageblit = cfb_imageblit,
83 };
84
q40fb_probe(struct platform_device * dev)85 static int q40fb_probe(struct platform_device *dev)
86 {
87 struct fb_info *info;
88
89 if (!MACH_IS_Q40)
90 return -ENXIO;
91
92 /* mapped in q40/config.c */
93 q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
94
95 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
96 if (!info)
97 return -ENOMEM;
98
99 info->var = q40fb_var;
100 info->fix = q40fb_fix;
101 info->fbops = &q40fb_ops;
102 info->flags = FBINFO_DEFAULT; /* not as module for now */
103 info->pseudo_palette = info->par;
104 info->par = NULL;
105 info->screen_base = (char *) q40fb_fix.smem_start;
106
107 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
108 framebuffer_release(info);
109 return -ENOMEM;
110 }
111
112 master_outb(3, DISPLAY_CONTROL_REG);
113
114 if (register_framebuffer(info) < 0) {
115 printk(KERN_ERR "Unable to register Q40 frame buffer\n");
116 fb_dealloc_cmap(&info->cmap);
117 framebuffer_release(info);
118 return -EINVAL;
119 }
120
121 fb_info(info, "Q40 frame buffer alive and kicking !\n");
122 return 0;
123 }
124
125 static struct platform_driver q40fb_driver = {
126 .probe = q40fb_probe,
127 .driver = {
128 .name = "q40fb",
129 },
130 };
131
132 static struct platform_device q40fb_device = {
133 .name = "q40fb",
134 };
135
q40fb_init(void)136 int __init q40fb_init(void)
137 {
138 int ret = 0;
139
140 if (fb_get_options("q40fb", NULL))
141 return -ENODEV;
142
143 ret = platform_driver_register(&q40fb_driver);
144
145 if (!ret) {
146 ret = platform_device_register(&q40fb_device);
147 if (ret)
148 platform_driver_unregister(&q40fb_driver);
149 }
150 return ret;
151 }
152
153 module_init(q40fb_init);
154 MODULE_LICENSE("GPL");
155
