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 #include <asm/pgtable.h>
27
28 #define Q40_PHYS_SCREEN_ADDR 0xFE800000
29
30 static struct fb_fix_screeninfo q40fb_fix = {
31 .id = "Q40",
32 .smem_len = 1024*1024,
33 .type = FB_TYPE_PACKED_PIXELS,
34 .visual = FB_VISUAL_TRUECOLOR,
35 .line_length = 1024*2,
36 .accel = FB_ACCEL_NONE,
37 };
38
39 static const struct fb_var_screeninfo q40fb_var = {
40 .xres = 1024,
41 .yres = 512,
42 .xres_virtual = 1024,
43 .yres_virtual = 512,
44 .bits_per_pixel = 16,
45 .red = {6, 5, 0},
46 .green = {11, 5, 0},
47 .blue = {0, 6, 0},
48 .activate = FB_ACTIVATE_NOW,
49 .height = 230,
50 .width = 300,
51 .vmode = FB_VMODE_NONINTERLACED,
52 };
53
q40fb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)54 static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
55 unsigned blue, unsigned transp,
56 struct fb_info *info)
57 {
58 /*
59 * Set a single color register. The values supplied have a 16 bit
60 * magnitude.
61 * Return != 0 for invalid regno.
62 */
63
64 if (regno > 255)
65 return 1;
66 red>>=11;
67 green>>=11;
68 blue>>=10;
69
70 if (regno < 16) {
71 ((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
72 ((green & 31) << 11) |
73 (blue & 63);
74 }
75 return 0;
76 }
77
78 static struct fb_ops q40fb_ops = {
79 .owner = THIS_MODULE,
80 .fb_setcolreg = q40fb_setcolreg,
81 .fb_fillrect = cfb_fillrect,
82 .fb_copyarea = cfb_copyarea,
83 .fb_imageblit = cfb_imageblit,
84 };
85
q40fb_probe(struct platform_device * dev)86 static int q40fb_probe(struct platform_device *dev)
87 {
88 struct fb_info *info;
89
90 if (!MACH_IS_Q40)
91 return -ENXIO;
92
93 /* mapped in q40/config.c */
94 q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
95
96 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
97 if (!info)
98 return -ENOMEM;
99
100 info->var = q40fb_var;
101 info->fix = q40fb_fix;
102 info->fbops = &q40fb_ops;
103 info->flags = FBINFO_DEFAULT; /* not as module for now */
104 info->pseudo_palette = info->par;
105 info->par = NULL;
106 info->screen_base = (char *) q40fb_fix.smem_start;
107
108 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
109 framebuffer_release(info);
110 return -ENOMEM;
111 }
112
113 master_outb(3, DISPLAY_CONTROL_REG);
114
115 if (register_framebuffer(info) < 0) {
116 printk(KERN_ERR "Unable to register Q40 frame buffer\n");
117 fb_dealloc_cmap(&info->cmap);
118 framebuffer_release(info);
119 return -EINVAL;
120 }
121
122 fb_info(info, "Q40 frame buffer alive and kicking !\n");
123 return 0;
124 }
125
126 static struct platform_driver q40fb_driver = {
127 .probe = q40fb_probe,
128 .driver = {
129 .name = "q40fb",
130 },
131 };
132
133 static struct platform_device q40fb_device = {
134 .name = "q40fb",
135 };
136
q40fb_init(void)137 int __init q40fb_init(void)
138 {
139 int ret = 0;
140
141 if (fb_get_options("q40fb", NULL))
142 return -ENODEV;
143
144 ret = platform_driver_register(&q40fb_driver);
145
146 if (!ret) {
147 ret = platform_device_register(&q40fb_device);
148 if (ret)
149 platform_driver_unregister(&q40fb_driver);
150 }
151 return ret;
152 }
153
154 module_init(q40fb_init);
155 MODULE_LICENSE("GPL");
156
