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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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/tty.h>
18#include <linux/slab.h>
19#include <linux/delay.h>
20#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010021#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <asm/uaccess.h>
24#include <asm/setup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <asm/system.h>
26#include <asm/q40_master.h>
27#include <linux/fb.h>
28#include <linux/module.h>
29#include <asm/pgtable.h>
30
31#define Q40_PHYS_SCREEN_ADDR 0xFE800000
32
33static struct fb_fix_screeninfo q40fb_fix __initdata = {
34 .id = "Q40",
35 .smem_len = 1024*1024,
36 .type = FB_TYPE_PACKED_PIXELS,
37 .visual = FB_VISUAL_TRUECOLOR,
38 .line_length = 1024*2,
39 .accel = FB_ACCEL_NONE,
40};
41
42static struct fb_var_screeninfo q40fb_var __initdata = {
43 .xres = 1024,
44 .yres = 512,
45 .xres_virtual = 1024,
46 .yres_virtual = 512,
47 .bits_per_pixel = 16,
48 .red = {6, 5, 0},
49 .green = {11, 5, 0},
50 .blue = {0, 6, 0},
51 .activate = FB_ACTIVATE_NOW,
52 .height = 230,
53 .width = 300,
54 .vmode = FB_VMODE_NONINTERLACED,
55};
56
57static int q40fb_setcolreg(unsigned regno, unsigned red, unsigned green,
58 unsigned blue, unsigned transp,
59 struct fb_info *info)
60{
61 /*
62 * Set a single color register. The values supplied have a 16 bit
63 * magnitude.
64 * Return != 0 for invalid regno.
65 */
66
67 if (regno > 255)
68 return 1;
69 red>>=11;
70 green>>=11;
71 blue>>=10;
72
73 if (regno < 16) {
74 ((u32 *)info->pseudo_palette)[regno] = ((red & 31) <<6) |
75 ((green & 31) << 11) |
76 (blue & 63);
77 }
78 return 0;
79}
80
81static struct fb_ops q40fb_ops = {
82 .owner = THIS_MODULE,
83 .fb_setcolreg = q40fb_setcolreg,
84 .fb_fillrect = cfb_fillrect,
85 .fb_copyarea = cfb_copyarea,
86 .fb_imageblit = cfb_imageblit,
Linus Torvalds1da177e2005-04-16 15:20:36 -070087};
88
Russell King3ae5eae2005-11-09 22:32:44 +000089static int __init q40fb_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 struct fb_info *info;
92
93 if (!MACH_IS_Q40)
94 return -ENXIO;
95
96 /* mapped in q40/config.c */
97 q40fb_fix.smem_start = Q40_PHYS_SCREEN_ADDR;
98
99 info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
100 if (!info)
101 return -ENOMEM;
102
103 info->var = q40fb_var;
104 info->fix = q40fb_fix;
105 info->fbops = &q40fb_ops;
106 info->flags = FBINFO_DEFAULT; /* not as module for now */
107 info->pseudo_palette = info->par;
108 info->par = NULL;
109 info->screen_base = (char *) q40fb_fix.smem_start;
110
111 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
112 framebuffer_release(info);
113 return -ENOMEM;
114 }
115
116 master_outb(3, DISPLAY_CONTROL_REG);
117
118 if (register_framebuffer(info) < 0) {
119 printk(KERN_ERR "Unable to register Q40 frame buffer\n");
120 fb_dealloc_cmap(&info->cmap);
121 framebuffer_release(info);
122 return -EINVAL;
123 }
124
125 printk(KERN_INFO "fb%d: Q40 frame buffer alive and kicking !\n",
126 info->node);
127 return 0;
128}
129
Russell King3ae5eae2005-11-09 22:32:44 +0000130static struct platform_driver q40fb_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 .probe = q40fb_probe,
Russell King3ae5eae2005-11-09 22:32:44 +0000132 .driver = {
133 .name = "q40fb",
134 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135};
136
137static struct platform_device q40fb_device = {
138 .name = "q40fb",
139};
140
141int __init q40fb_init(void)
142{
143 int ret = 0;
144
145 if (fb_get_options("q40fb", NULL))
146 return -ENODEV;
147
Russell King3ae5eae2005-11-09 22:32:44 +0000148 ret = platform_driver_register(&q40fb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150 if (!ret) {
151 ret = platform_device_register(&q40fb_device);
152 if (ret)
Russell King3ae5eae2005-11-09 22:32:44 +0000153 platform_driver_unregister(&q40fb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 }
155 return ret;
156}
157
158module_init(q40fb_init);
159MODULE_LICENSE("GPL");