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annotate vfb/vfb.c @ 2:bac8ed8d6eb9

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add jpeg coding and test stuff
author Peter Meerwald <pmeerw@pmeerw.net>
date Sun, 08 May 2011 18:22:22 +0200
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2
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1 /*
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2 * linux/drivers/video/vfb.c -- Virtual frame buffer device
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3 *
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4 * Copyright (C) 2002 James Simmons
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5 *
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6 * Copyright (C) 1997 Geert Uytterhoeven
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7 *
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8 * This file is subject to the terms and conditions of the GNU General Public
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9 * License. See the file COPYING in the main directory of this archive for
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10 * more details.
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11 */
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12
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13 #include <linux/module.h>
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14 #include <linux/kernel.h>
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15 #include <linux/errno.h>
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16 #include <linux/string.h>
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17 #include <linux/mm.h>
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18 #include <linux/vmalloc.h>
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19 #include <linux/delay.h>
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20 #include <linux/interrupt.h>
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21 #include <linux/platform_device.h>
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22
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23 #include <linux/fb.h>
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24 #include <linux/init.h>
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25
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26 /*
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27 * RAM we reserve for the frame buffer. This defines the maximum screen
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28 * size
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29 *
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30 * The default can be overridden if the driver is compiled as a module
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31 */
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32
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33 #define VIDEOMEMSIZE (1*1024*1024) /* 1 MB */
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34
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35 static void *videomemory;
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36 static u_long videomemorysize = VIDEOMEMSIZE;
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37 module_param(videomemorysize, ulong, 0);
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38
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39 /**********************************************************************
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40 *
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41 * Memory management
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42 *
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43 **********************************************************************/
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44 static void *rvmalloc(unsigned long size)
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45 {
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46 void *mem;
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47 unsigned long adr;
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48
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49 size = PAGE_ALIGN(size);
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50 mem = vmalloc_32(size);
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51 if (!mem)
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52 return NULL;
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53
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54 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
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55 adr = (unsigned long) mem;
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56 while (size > 0) {
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57 SetPageReserved(vmalloc_to_page((void *)adr));
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58 adr += PAGE_SIZE;
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59 size -= PAGE_SIZE;
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60 }
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61
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62 return mem;
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63 }
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64
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65 static void rvfree(void *mem, unsigned long size)
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66 {
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67 unsigned long adr;
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68
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69 if (!mem)
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70 return;
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71
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72 adr = (unsigned long) mem;
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73 while ((long) size > 0) {
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74 ClearPageReserved(vmalloc_to_page((void *)adr));
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75 adr += PAGE_SIZE;
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76 size -= PAGE_SIZE;
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77 }
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78 vfree(mem);
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79 }
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80
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81 static struct fb_var_screeninfo vfb_default __devinitdata = {
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82 .xres = 640,
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83 .yres = 480,
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84 .xres_virtual = 640,
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85 .yres_virtual = 480,
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86 .bits_per_pixel = 8,
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87 .red = { 0, 8, 0 },
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88 .green = { 0, 8, 0 },
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89 .blue = { 0, 8, 0 },
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90 .activate = FB_ACTIVATE_TEST,
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91 .height = -1,
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92 .width = -1,
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93 .pixclock = 20000,
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94 .left_margin = 64,
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95 .right_margin = 64,
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96 .upper_margin = 32,
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97 .lower_margin = 32,
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98 .hsync_len = 64,
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99 .vsync_len = 2,
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100 .vmode = FB_VMODE_NONINTERLACED,
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101 };
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102
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103 static struct fb_fix_screeninfo vfb_fix __devinitdata = {
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104 .id = "Virtual FB",
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105 .type = FB_TYPE_PACKED_PIXELS,
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106 .visual = FB_VISUAL_PSEUDOCOLOR,
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107 .xpanstep = 1,
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108 .ypanstep = 1,
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109 .ywrapstep = 1,
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110 .accel = FB_ACCEL_NONE,
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111 };
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112
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113 static int vfb_enable __initdata = 0; /* disabled by default */
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114 module_param(vfb_enable, bool, 0);
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115
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116 static int vfb_check_var(struct fb_var_screeninfo *var,
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117 struct fb_info *info);
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118 static int vfb_set_par(struct fb_info *info);
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119 static int vfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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120 u_int transp, struct fb_info *info);
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121 static int vfb_pan_display(struct fb_var_screeninfo *var,
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122 struct fb_info *info);
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123 static int vfb_mmap(struct fb_info *info,
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124 struct vm_area_struct *vma);
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125
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126 static struct fb_ops vfb_ops = {
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127 .fb_read = fb_sys_read,
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128 .fb_write = fb_sys_write,
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129 .fb_check_var = vfb_check_var,
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130 .fb_set_par = vfb_set_par,
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131 .fb_setcolreg = vfb_setcolreg,
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132 .fb_pan_display = vfb_pan_display,
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133 .fb_fillrect = sys_fillrect,
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134 .fb_copyarea = sys_copyarea,
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135 .fb_imageblit = sys_imageblit,
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136 .fb_mmap = vfb_mmap,
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137 };
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138
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139 /*
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140 * Internal routines
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141 */
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142
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diff changeset
143 static u_long get_line_length(int xres_virtual, int bpp)
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diff changeset
144 {
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parents:
diff changeset
145 u_long length;
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parents:
diff changeset
146
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diff changeset
147 length = xres_virtual * bpp;
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parents:
diff changeset
148 length = (length + 31) & ~31;
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parents:
diff changeset
149 length >>= 3;
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parents:
diff changeset
150 return (length);
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parents:
diff changeset
151 }
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parents:
diff changeset
152
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parents:
diff changeset
153 /*
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parents:
diff changeset
154 * Setting the video mode has been split into two parts.
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
155 * First part, xxxfb_check_var, must not write anything
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parents:
diff changeset
156 * to hardware, it should only verify and adjust var.
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parents:
diff changeset
157 * This means it doesn't alter par but it does use hardware
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parents:
diff changeset
158 * data from it to check this var.
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parents:
diff changeset
159 */
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parents:
diff changeset
160
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parents:
diff changeset
161 static int vfb_check_var(struct fb_var_screeninfo *var,
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parents:
diff changeset
162 struct fb_info *info)
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parents:
diff changeset
163 {
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parents:
diff changeset
164 u_long line_length;
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parents:
diff changeset
165
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parents:
diff changeset
166 /*
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parents:
diff changeset
167 * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
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parents:
diff changeset
168 * as FB_VMODE_SMOOTH_XPAN is only used internally
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diff changeset
169 */
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parents:
diff changeset
170
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parents:
diff changeset
171 if (var->vmode & FB_VMODE_CONUPDATE) {
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parents:
diff changeset
172 var->vmode |= FB_VMODE_YWRAP;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
173 var->xoffset = info->var.xoffset;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
174 var->yoffset = info->var.yoffset;
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parents:
diff changeset
175 }
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parents:
diff changeset
176
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parents:
diff changeset
177 /*
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parents:
diff changeset
178 * Some very basic checks
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diff changeset
179 */
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parents:
diff changeset
180 if (!var->xres)
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parents:
diff changeset
181 var->xres = 1;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
182 if (!var->yres)
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parents:
diff changeset
183 var->yres = 1;
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parents:
diff changeset
184 if (var->xres > var->xres_virtual)
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parents:
diff changeset
185 var->xres_virtual = var->xres;
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parents:
diff changeset
186 if (var->yres > var->yres_virtual)
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parents:
diff changeset
187 var->yres_virtual = var->yres;
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parents:
diff changeset
188 if (var->bits_per_pixel <= 1)
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diff changeset
189 var->bits_per_pixel = 1;
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parents:
diff changeset
190 else if (var->bits_per_pixel <= 8)
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parents:
diff changeset
191 var->bits_per_pixel = 8;
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diff changeset
192 else if (var->bits_per_pixel <= 16)
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parents:
diff changeset
193 var->bits_per_pixel = 16;
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parents:
diff changeset
194 else if (var->bits_per_pixel <= 24)
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diff changeset
195 var->bits_per_pixel = 24;
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diff changeset
196 else if (var->bits_per_pixel <= 32)
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diff changeset
197 var->bits_per_pixel = 32;
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parents:
diff changeset
198 else
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parents:
diff changeset
199 return -EINVAL;
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parents:
diff changeset
200
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parents:
diff changeset
201 if (var->xres_virtual < var->xoffset + var->xres)
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parents:
diff changeset
202 var->xres_virtual = var->xoffset + var->xres;
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parents:
diff changeset
203 if (var->yres_virtual < var->yoffset + var->yres)
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parents:
diff changeset
204 var->yres_virtual = var->yoffset + var->yres;
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parents:
diff changeset
205
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parents:
diff changeset
206 /*
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
207 * Memory limit
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parents:
diff changeset
208 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
209 line_length =
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diff changeset
210 get_line_length(var->xres_virtual, var->bits_per_pixel);
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parents:
diff changeset
211 if (line_length * var->yres_virtual > videomemorysize)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
212 return -ENOMEM;
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parents:
diff changeset
213
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
214 /*
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parents:
diff changeset
215 * Now that we checked it we alter var. The reason being is that the video
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parents:
diff changeset
216 * mode passed in might not work but slight changes to it might make it
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parents:
diff changeset
217 * work. This way we let the user know what is acceptable.
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parents:
diff changeset
218 */
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parents:
diff changeset
219 switch (var->bits_per_pixel) {
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parents:
diff changeset
220 case 1:
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parents:
diff changeset
221 case 8:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
222 var->red.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
223 var->red.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
224 var->green.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
225 var->green.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
226 var->blue.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
227 var->blue.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
228 var->transp.offset = 0;
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parents:
diff changeset
229 var->transp.length = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
230 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
231 case 16: /* RGBA 5551 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
232 if (var->transp.length) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
233 var->red.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
234 var->red.length = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
235 var->green.offset = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
236 var->green.length = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
237 var->blue.offset = 10;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
238 var->blue.length = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
239 var->transp.offset = 15;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
240 var->transp.length = 1;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
241 } else { /* RGB 565 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
242 var->red.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
243 var->red.length = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
244 var->green.offset = 5;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
245 var->green.length = 6;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
246 var->blue.offset = 11;
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parents:
diff changeset
247 var->blue.length = 5;
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parents:
diff changeset
248 var->transp.offset = 0;
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parents:
diff changeset
249 var->transp.length = 0;
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parents:
diff changeset
250 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
251 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
252 case 24: /* RGB 888 */
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parents:
diff changeset
253 var->red.offset = 0;
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parents:
diff changeset
254 var->red.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
255 var->green.offset = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
256 var->green.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
257 var->blue.offset = 16;
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parents:
diff changeset
258 var->blue.length = 8;
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parents:
diff changeset
259 var->transp.offset = 0;
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parents:
diff changeset
260 var->transp.length = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
261 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
262 case 32: /* RGBA 8888 */
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parents:
diff changeset
263 var->red.offset = 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
264 var->red.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
265 var->green.offset = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
266 var->green.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
267 var->blue.offset = 16;
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parents:
diff changeset
268 var->blue.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
269 var->transp.offset = 24;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
270 var->transp.length = 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
271 break;
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parents:
diff changeset
272 }
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parents:
diff changeset
273 var->red.msb_right = 0;
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parents:
diff changeset
274 var->green.msb_right = 0;
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parents:
diff changeset
275 var->blue.msb_right = 0;
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parents:
diff changeset
276 var->transp.msb_right = 0;
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parents:
diff changeset
277
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parents:
diff changeset
278 return 0;
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parents:
diff changeset
279 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
280
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
281 /* This routine actually sets the video mode. It's in here where we
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
282 * the hardware state info->par and fix which can be affected by the
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
283 * change in par. For this driver it doesn't do much.
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
284 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
285 static int vfb_set_par(struct fb_info *info)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
286 {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
287 info->fix.line_length = get_line_length(info->var.xres_virtual,
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
288 info->var.bits_per_pixel);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
289 return 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
290 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
291
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
292 /*
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
293 * Set a single color register. The values supplied are already
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
294 * rounded down to the hardware's capabilities (according to the
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
295 * entries in the var structure). Return != 0 for invalid regno.
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
296 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
297
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
298 static int vfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
299 u_int transp, struct fb_info *info)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
300 {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
301 if (regno >= 256) /* no. of hw registers */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
302 return 1;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
303 /*
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
304 * Program hardware... do anything you want with transp
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
305 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
306
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
307 /* grayscale works only partially under directcolor */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
308 if (info->var.grayscale) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
309 /* grayscale = 0.30*R + 0.59*G + 0.11*B */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
310 red = green = blue =
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
311 (red * 77 + green * 151 + blue * 28) >> 8;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
312 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
313
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
314 /* Directcolor:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
315 * var->{color}.offset contains start of bitfield
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
316 * var->{color}.length contains length of bitfield
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
317 * {hardwarespecific} contains width of RAMDAC
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
318 * cmap[X] is programmed to (X << red.offset) | (X << green.offset) | (X << blue.offset)
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parents:
diff changeset
319 * RAMDAC[X] is programmed to (red, green, blue)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
320 *
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
321 * Pseudocolor:
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parents:
diff changeset
322 * var->{color}.offset is 0 unless the palette index takes less than
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
323 * bits_per_pixel bits and is stored in the upper
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
324 * bits of the pixel value
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
325 * var->{color}.length is set so that 1 << length is the number of available
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
326 * palette entries
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
327 * cmap is not used
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
328 * RAMDAC[X] is programmed to (red, green, blue)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
329 *
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
330 * Truecolor:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
331 * does not use DAC. Usually 3 are present.
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
332 * var->{color}.offset contains start of bitfield
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
333 * var->{color}.length contains length of bitfield
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
334 * cmap is programmed to (red << red.offset) | (green << green.offset) |
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
335 * (blue << blue.offset) | (transp << transp.offset)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
336 * RAMDAC does not exist
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
337 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
338 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
339 switch (info->fix.visual) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
340 case FB_VISUAL_TRUECOLOR:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
341 case FB_VISUAL_PSEUDOCOLOR:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
342 red = CNVT_TOHW(red, info->var.red.length);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
343 green = CNVT_TOHW(green, info->var.green.length);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
344 blue = CNVT_TOHW(blue, info->var.blue.length);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
345 transp = CNVT_TOHW(transp, info->var.transp.length);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
346 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
347 case FB_VISUAL_DIRECTCOLOR:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
348 red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
349 green = CNVT_TOHW(green, 8);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
350 blue = CNVT_TOHW(blue, 8);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
351 /* hey, there is bug in transp handling... */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
352 transp = CNVT_TOHW(transp, 8);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
353 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
354 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
355 #undef CNVT_TOHW
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
356 /* Truecolor has hardware independent palette */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
357 if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
358 u32 v;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
359
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
360 if (regno >= 16)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
361 return 1;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
362
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
363 v = (red << info->var.red.offset) |
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
364 (green << info->var.green.offset) |
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
365 (blue << info->var.blue.offset) |
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
366 (transp << info->var.transp.offset);
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
367 switch (info->var.bits_per_pixel) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
368 case 8:
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
369 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
370 case 16:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
371 ((u32 *) (info->pseudo_palette))[regno] = v;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
372 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
373 case 24:
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
374 case 32:
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
375 ((u32 *) (info->pseudo_palette))[regno] = v;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
376 break;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
377 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
378 return 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
379 }
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
380 return 0;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
381 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
382
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
383 /*
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
384 * Pan or Wrap the Display
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
385 *
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
386 * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
387 */
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
388
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
389 static int vfb_pan_display(struct fb_var_screeninfo *var,
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
390 struct fb_info *info)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
391 {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
392 if (var->vmode & FB_VMODE_YWRAP) {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
393 if (var->yoffset < 0
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
394 || var->yoffset >= info->var.yres_virtual
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
395 || var->xoffset)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
396 return -EINVAL;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
397 } else {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
398 if (var->xoffset + var->xres > info->var.xres_virtual ||
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
399 var->yoffset + var->yres > info->var.yres_virtual)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
400 return -EINVAL;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
401 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
402 info->var.xoffset = var->xoffset;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
403 info->var.yoffset = var->yoffset;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
404 if (var->vmode & FB_VMODE_YWRAP)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
405 info->var.vmode |= FB_VMODE_YWRAP;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
406 else
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
407 info->var.vmode &= ~FB_VMODE_YWRAP;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
408 return 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
409 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
410
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
411 /*
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
412 * Most drivers don't need their own mmap function
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
413 */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
414
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
415 static int vfb_mmap(struct fb_info *info,
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
416 struct vm_area_struct *vma)
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
417 {
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
418 unsigned long start = vma->vm_start;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
419 unsigned long size = vma->vm_end - vma->vm_start;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
420 unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
421 unsigned long page, pos;
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Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
422
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
423 if (offset + size > info->fix.smem_len) {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
424 return -EINVAL;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
425 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
426
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
427 pos = (unsigned long)info->fix.smem_start + offset;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
428
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
429 while (size > 0) {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
430 page = vmalloc_to_pfn((void *)pos);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
431 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
432 return -EAGAIN;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
433 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
434 start += PAGE_SIZE;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
435 pos += PAGE_SIZE;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
436 if (size > PAGE_SIZE)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
437 size -= PAGE_SIZE;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
438 else
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
439 size = 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
440 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
441
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
442 vma->vm_flags |= VM_RESERVED; /* avoid to swap out this VMA */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
443 return 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
444
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
445 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
446
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
447 #ifndef MODULE
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
448 /*
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
449 * The virtual framebuffer driver is only enabled if explicitly
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
450 * requested by passing 'video=vfb:' (or any actual options).
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
451 */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
452 static int __init vfb_setup(char *options)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
453 {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
454 char *this_opt;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
455
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
456 vfb_enable = 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
457
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
458 if (!options)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
459 return 1;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
460
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
461 vfb_enable = 1;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
462
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
463 if (!*options)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
464 return 1;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
465
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
466 while ((this_opt = strsep(&options, ",")) != NULL) {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
467 if (!*this_opt)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
468 continue;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
469 /* Test disable for backwards compatibility */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
470 if (!strcmp(this_opt, "disable"))
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
471 vfb_enable = 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
472 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
473 return 1;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
474 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
475 #endif /* MODULE */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
476
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
477 /*
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
478 * Initialisation
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
479 */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
480
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
481 static int __devinit vfb_probe(struct platform_device *dev)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
482 {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
483 struct fb_info *info;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
484 int retval = -ENOMEM;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
485
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
486 /*
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
487 * For real video cards we use ioremap.
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
488 */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
489 if (!(videomemory = rvmalloc(videomemorysize)))
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
490 return retval;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
491
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
492 /*
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
493 * VFB must clear memory to prevent kernel info
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
494 * leakage into userspace
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
495 * VGA-based drivers MUST NOT clear memory if
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
496 * they want to be able to take over vgacon
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
497 */
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
498 memset(videomemory, 0, videomemorysize);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
499
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
500 info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
501 if (!info)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
502 goto err;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
503
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
504 info->screen_base = (char __iomem *)videomemory;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
505 info->fbops = &vfb_ops;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
506
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
507 retval = fb_find_mode(&info->var, info, NULL,
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
508 NULL, 0, NULL, 8);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
509
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
510 if (!retval || (retval == 4))
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
511 info->var = vfb_default;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
512 vfb_fix.smem_start = (unsigned long) videomemory;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
513 vfb_fix.smem_len = videomemorysize;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
514 info->fix = vfb_fix;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
515 info->pseudo_palette = info->par;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
516 info->par = NULL;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
517 info->flags = FBINFO_FLAG_DEFAULT;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
518
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
519 retval = fb_alloc_cmap(&info->cmap, 256, 0);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
520 if (retval < 0)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
521 goto err1;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
522
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
523 retval = register_framebuffer(info);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
524 if (retval < 0)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
525 goto err2;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
526 platform_set_drvdata(dev, info);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
527
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
528 printk(KERN_INFO
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
529 "fb%d: Virtual frame buffer device, using %ldK of video memory\n",
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
530 info->node, videomemorysize >> 10);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
531 return 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
532 err2:
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
533 fb_dealloc_cmap(&info->cmap);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
534 err1:
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
535 framebuffer_release(info);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
536 err:
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
537 rvfree(videomemory, videomemorysize);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
538 return retval;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
539 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
540
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
541 static int vfb_remove(struct platform_device *dev)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
542 {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
543 struct fb_info *info = platform_get_drvdata(dev);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
544
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
545 if (info) {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
546 unregister_framebuffer(info);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
547 rvfree(videomemory, videomemorysize);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
548 fb_dealloc_cmap(&info->cmap);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
549 framebuffer_release(info);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
550 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
551 return 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
552 }
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
553
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
554 static struct platform_driver vfb_driver = {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
555 .probe = vfb_probe,
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
556 .remove = vfb_remove,
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
557 .driver = {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
558 .name = "vfb",
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
559 },
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
560 };
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
561
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
562 static struct platform_device *vfb_device;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
563
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
564 static int __init vfb_init(void)
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
565 {
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
566 int ret = 0;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
567
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
568 #ifndef MODULE
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
569 char *option = NULL;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
570
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
571 if (fb_get_options("vfb", &option))
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
572 return -ENODEV;
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
573 vfb_setup(option);
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
574 #endif
bac8ed8d6eb9 add jpeg coding and test stuff
Peter Meerwald <pmeerw@pmeerw.net>
parents:
diff changeset
575
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576 if (!vfb_enable)
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577 return -ENXIO;
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578
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579 ret = platform_driver_register(&vfb_driver);
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580
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581 if (!ret) {
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582 vfb_device = platform_device_alloc("vfb", 0);
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583
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584 if (vfb_device)
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585 ret = platform_device_add(vfb_device);
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586 else
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587 ret = -ENOMEM;
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588
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589 if (ret) {
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590 platform_device_put(vfb_device);
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591 platform_driver_unregister(&vfb_driver);
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592 }
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593 }
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594
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595 return ret;
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596 }
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597
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598 module_init(vfb_init);
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599
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600 #ifdef MODULE
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601 static void __exit vfb_exit(void)
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602 {
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603 platform_device_unregister(vfb_device);
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604 platform_driver_unregister(&vfb_driver);
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605 }
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606
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607 module_exit(vfb_exit);
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608
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609 MODULE_LICENSE("GPL");
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610 #endif /* MODULE */

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.