blob: d44c7351de0f6dc0e2350cd1cd9ab67fa1457f3e [file] [log] [blame]
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/delay.h>
18#include <linux/interrupt.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010019#include <linux/platform_device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
21#include <asm/uaccess.h>
22#include <asm/setup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#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
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -080030static struct fb_fix_screeninfo q40fb_fix = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 .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
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -080039static struct fb_var_screeninfo q40fb_var = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 .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
54static 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
78static 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,
Linus Torvalds1da177e2005-04-16 15:20:36 -070084};
85
Greg Kroah-Hartman48c68c42012-12-21 13:07:39 -080086static int q40fb_probe(struct platform_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 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
Antonino A. Daplasce303c02007-07-17 04:05:40 -070096 info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 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 printk(KERN_INFO "fb%d: Q40 frame buffer alive and kicking !\n",
123 info->node);
124 return 0;
125}
126
Russell King3ae5eae2005-11-09 22:32:44 +0000127static struct platform_driver q40fb_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 .probe = q40fb_probe,
Russell King3ae5eae2005-11-09 22:32:44 +0000129 .driver = {
130 .name = "q40fb",
131 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132};
133
134static struct platform_device q40fb_device = {
135 .name = "q40fb",
136};
137
138int __init q40fb_init(void)
139{
140 int ret = 0;
141
142 if (fb_get_options("q40fb", NULL))
143 return -ENODEV;
144
Russell King3ae5eae2005-11-09 22:32:44 +0000145 ret = platform_driver_register(&q40fb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
147 if (!ret) {
148 ret = platform_device_register(&q40fb_device);
149 if (ret)
Russell King3ae5eae2005-11-09 22:32:44 +0000150 platform_driver_unregister(&q40fb_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 }
152 return ret;
153}
154
155module_init(q40fb_init);
156MODULE_LICENSE("GPL");