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 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 const 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 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 }; 136 137 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