Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / video / q40fb.c
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 __initdata = {
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 __initdata = {
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
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
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
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");