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 <asm/uaccess.h>
22 #include <asm/setup.h>
23 #include <asm/system.h>
24 #include <asm/q40_master.h>
25 #include <linux/fb.h>
26 #include <linux/module.h>
27 #include <asm/pgtable.h>
28
29 #define Q40_PHYS_SCREEN_ADDR 0xFE800000
30
31 static struct fb_fix_screeninfo q40fb_fix __devinitdata = {
32 .id = "Q40",
33 .smem_len = 1024*1024,
34 .type = FB_TYPE_PACKED_PIXELS,
35 .visual = FB_VISUAL_TRUECOLOR,
36 .line_length = 1024*2,
37 .accel = FB_ACCEL_NONE,
38 };
39
40 static struct fb_var_screeninfo q40fb_var __devinitdata = {
41 .xres = 1024,
42 .yres = 512,
43 .xres_virtual = 1024,
44 .yres_virtual = 512,
45 .bits_per_pixel = 16,
46 .red = {6, 5, 0},
47 .green = {11, 5, 0},
48 .blue = {0, 6, 0},
49 .activate = FB_ACTIVATE_NOW,
50 .height = 230,
51 .width = 300,
52 .vmode = FB_VMODE_NONINTERLACED,
53 };
54
q40fb_setcolreg(unsigned regno,unsigned red,unsigned green,unsigned blue,unsigned transp,struct fb_info * info)55 static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
56 unsigned blue, unsigned transp,
57 struct fb_info *info)
58 {
59 /*
60 * Set a single color register. The values supplied have a 16 bit
61 * magnitude.
62 * Return != 0 for invalid regno.
63 */
64
65 if (regno > 255)
66 return 1;
67 red>>=11;
68 green>>=11;
69 blue>>=10;
70
71 if (regno < 16) {
72 ((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
73 ((green & 31) << 11) |
74 (blue & 63);
75 }
76 return 0;
77 }
78
79 static struct fb_ops q40fb_ops = {
80 .owner = THIS_MODULE,
81 .fb_setcolreg = q40fb_setcolreg,
82 .fb_fillrect = cfb_fillrect,
83 .fb_copyarea = cfb_copyarea,
84 .fb_imageblit = cfb_imageblit,
85 };
86
q40fb_probe(struct platform_device * dev)87 static int __devinit q40fb_probe(struct platform_device *dev)
88 {
89 struct fb_info *info;
90
91 if (!MACH_IS_Q40)
92 return -ENXIO;
93
94 /* mapped in q40/config.c */
95 q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
96
97 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
98 if (!info)
99 return -ENOMEM;
100
101 info->var = q40fb_var;
102 info->fix = q40fb_fix;
103 info->fbops = &q40fb_ops;
104 info->flags = FBINFO_DEFAULT; /* not as module for now */
105 info->pseudo_palette = info->par;
106 info->par = NULL;
107 info->screen_base = (char *) q40fb_fix.smem_start;
108
109 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
110 framebuffer_release(info);
111 return -ENOMEM;
112 }
113
114 master_outb(3, DISPLAY_CONTROL_REG);
115
116 if (register_framebuffer(info) < 0) {
117 printk(KERN_ERR "Unable to register Q40 frame buffer\n");
118 fb_dealloc_cmap(&info->cmap);
119 framebuffer_release(info);
120 return -EINVAL;
121 }
122
123 printk(KERN_INFO "fb%d: Q40 frame buffer alive and kicking !\n",
124 info->node);
125 return 0;
126 }
127
128 static struct platform_driver q40fb_driver = {
129 .probe = q40fb_probe,
130 .driver = {
131 .name = "q40fb",
132 },
133 };
134
135 static struct platform_device q40fb_device = {
136 .name = "q40fb",
137 };
138
q40fb_init(void)139 int __init q40fb_init(void)
140 {
141 int ret = 0;
142
143 if (fb_get_options("q40fb", NULL))
144 return -ENODEV;
145
146 ret = platform_driver_register(&q40fb_driver);
147
148 if (!ret) {
149 ret = platform_device_register(&q40fb_device);
150 if (ret)
151 platform_driver_unregister(&q40fb_driver);
152 }
153 return ret;
154 }
155
156 module_init(q40fb_init);
157 MODULE_LICENSE("GPL");
158