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authorTomi Valkeinen <tomi.valkeinen@ti.com>2014-02-13 17:31:38 +0400
committerTomi Valkeinen <tomi.valkeinen@ti.com>2014-04-17 09:10:19 +0400
commitf7018c21350204c4cf628462f229d44d03545254 (patch)
tree408787177164cf51cc06f7aabdb04fcff8d2b6aa /drivers/video/vfb.c
parentc26ef3eb3c11274bad1b64498d0a134f85755250 (diff)
downloadlinux-f7018c21350204c4cf628462f229d44d03545254.tar.xz
video: move fbdev to drivers/video/fbdev
The drivers/video directory is a mess. It contains generic video related files, directories for backlight, console, linux logo, lots of fbdev device drivers, fbdev framework files. Make some order into the chaos by creating drivers/video/fbdev directory, and move all fbdev related files there. No functionality is changed, although I guess it is possible that some subtle Makefile build order related issue could be created by this patch. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Rob Clark <robdclark@gmail.com> Acked-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/video/vfb.c')
-rw-r--r--drivers/video/vfb.c610
1 files changed, 0 insertions, 610 deletions
diff --git a/drivers/video/vfb.c b/drivers/video/vfb.c
deleted file mode 100644
index 70a897b1e458..000000000000
--- a/drivers/video/vfb.c
+++ /dev/null
@@ -1,610 +0,0 @@
-/*
- * linux/drivers/video/vfb.c -- Virtual frame buffer device
- *
- * Copyright (C) 2002 James Simmons
- *
- * Copyright (C) 1997 Geert Uytterhoeven
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive for
- * more details.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/vmalloc.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
-#include <linux/platform_device.h>
-
-#include <linux/fb.h>
-#include <linux/init.h>
-
- /*
- * RAM we reserve for the frame buffer. This defines the maximum screen
- * size
- *
- * The default can be overridden if the driver is compiled as a module
- */
-
-#define VIDEOMEMSIZE (1*1024*1024) /* 1 MB */
-
-static void *videomemory;
-static u_long videomemorysize = VIDEOMEMSIZE;
-module_param(videomemorysize, ulong, 0);
-
-/**********************************************************************
- *
- * Memory management
- *
- **********************************************************************/
-static void *rvmalloc(unsigned long size)
-{
- void *mem;
- unsigned long adr;
-
- size = PAGE_ALIGN(size);
- mem = vmalloc_32(size);
- if (!mem)
- return NULL;
-
- memset(mem, 0, size); /* Clear the ram out, no junk to the user */
- adr = (unsigned long) mem;
- while (size > 0) {
- SetPageReserved(vmalloc_to_page((void *)adr));
- adr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- return mem;
-}
-
-static void rvfree(void *mem, unsigned long size)
-{
- unsigned long adr;
-
- if (!mem)
- return;
-
- adr = (unsigned long) mem;
- while ((long) size > 0) {
- ClearPageReserved(vmalloc_to_page((void *)adr));
- adr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
- vfree(mem);
-}
-
-static struct fb_var_screeninfo vfb_default = {
- .xres = 640,
- .yres = 480,
- .xres_virtual = 640,
- .yres_virtual = 480,
- .bits_per_pixel = 8,
- .red = { 0, 8, 0 },
- .green = { 0, 8, 0 },
- .blue = { 0, 8, 0 },
- .activate = FB_ACTIVATE_TEST,
- .height = -1,
- .width = -1,
- .pixclock = 20000,
- .left_margin = 64,
- .right_margin = 64,
- .upper_margin = 32,
- .lower_margin = 32,
- .hsync_len = 64,
- .vsync_len = 2,
- .vmode = FB_VMODE_NONINTERLACED,
-};
-
-static struct fb_fix_screeninfo vfb_fix = {
- .id = "Virtual FB",
- .type = FB_TYPE_PACKED_PIXELS,
- .visual = FB_VISUAL_PSEUDOCOLOR,
- .xpanstep = 1,
- .ypanstep = 1,
- .ywrapstep = 1,
- .accel = FB_ACCEL_NONE,
-};
-
-static bool vfb_enable __initdata = 0; /* disabled by default */
-module_param(vfb_enable, bool, 0);
-
-static int vfb_check_var(struct fb_var_screeninfo *var,
- struct fb_info *info);
-static int vfb_set_par(struct fb_info *info);
-static int vfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int transp, struct fb_info *info);
-static int vfb_pan_display(struct fb_var_screeninfo *var,
- struct fb_info *info);
-static int vfb_mmap(struct fb_info *info,
- struct vm_area_struct *vma);
-
-static struct fb_ops vfb_ops = {
- .fb_read = fb_sys_read,
- .fb_write = fb_sys_write,
- .fb_check_var = vfb_check_var,
- .fb_set_par = vfb_set_par,
- .fb_setcolreg = vfb_setcolreg,
- .fb_pan_display = vfb_pan_display,
- .fb_fillrect = sys_fillrect,
- .fb_copyarea = sys_copyarea,
- .fb_imageblit = sys_imageblit,
- .fb_mmap = vfb_mmap,
-};
-
- /*
- * Internal routines
- */
-
-static u_long get_line_length(int xres_virtual, int bpp)
-{
- u_long length;
-
- length = xres_virtual * bpp;
- length = (length + 31) & ~31;
- length >>= 3;
- return (length);
-}
-
- /*
- * Setting the video mode has been split into two parts.
- * First part, xxxfb_check_var, must not write anything
- * to hardware, it should only verify and adjust var.
- * This means it doesn't alter par but it does use hardware
- * data from it to check this var.
- */
-
-static int vfb_check_var(struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- u_long line_length;
-
- /*
- * FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
- * as FB_VMODE_SMOOTH_XPAN is only used internally
- */
-
- if (var->vmode & FB_VMODE_CONUPDATE) {
- var->vmode |= FB_VMODE_YWRAP;
- var->xoffset = info->var.xoffset;
- var->yoffset = info->var.yoffset;
- }
-
- /*
- * Some very basic checks
- */
- if (!var->xres)
- var->xres = 1;
- if (!var->yres)
- var->yres = 1;
- if (var->xres > var->xres_virtual)
- var->xres_virtual = var->xres;
- if (var->yres > var->yres_virtual)
- var->yres_virtual = var->yres;
- if (var->bits_per_pixel <= 1)
- var->bits_per_pixel = 1;
- else if (var->bits_per_pixel <= 8)
- var->bits_per_pixel = 8;
- else if (var->bits_per_pixel <= 16)
- var->bits_per_pixel = 16;
- else if (var->bits_per_pixel <= 24)
- var->bits_per_pixel = 24;
- else if (var->bits_per_pixel <= 32)
- var->bits_per_pixel = 32;
- else
- return -EINVAL;
-
- if (var->xres_virtual < var->xoffset + var->xres)
- var->xres_virtual = var->xoffset + var->xres;
- if (var->yres_virtual < var->yoffset + var->yres)
- var->yres_virtual = var->yoffset + var->yres;
-
- /*
- * Memory limit
- */
- line_length =
- get_line_length(var->xres_virtual, var->bits_per_pixel);
- if (line_length * var->yres_virtual > videomemorysize)
- return -ENOMEM;
-
- /*
- * Now that we checked it we alter var. The reason being is that the video
- * mode passed in might not work but slight changes to it might make it
- * work. This way we let the user know what is acceptable.
- */
- switch (var->bits_per_pixel) {
- case 1:
- case 8:
- var->red.offset = 0;
- var->red.length = 8;
- var->green.offset = 0;
- var->green.length = 8;
- var->blue.offset = 0;
- var->blue.length = 8;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 16: /* RGBA 5551 */
- if (var->transp.length) {
- var->red.offset = 0;
- var->red.length = 5;
- var->green.offset = 5;
- var->green.length = 5;
- var->blue.offset = 10;
- var->blue.length = 5;
- var->transp.offset = 15;
- var->transp.length = 1;
- } else { /* RGB 565 */
- var->red.offset = 0;
- var->red.length = 5;
- var->green.offset = 5;
- var->green.length = 6;
- var->blue.offset = 11;
- var->blue.length = 5;
- var->transp.offset = 0;
- var->transp.length = 0;
- }
- break;
- case 24: /* RGB 888 */
- var->red.offset = 0;
- var->red.length = 8;
- var->green.offset = 8;
- var->green.length = 8;
- var->blue.offset = 16;
- var->blue.length = 8;
- var->transp.offset = 0;
- var->transp.length = 0;
- break;
- case 32: /* RGBA 8888 */
- var->red.offset = 0;
- var->red.length = 8;
- var->green.offset = 8;
- var->green.length = 8;
- var->blue.offset = 16;
- var->blue.length = 8;
- var->transp.offset = 24;
- var->transp.length = 8;
- break;
- }
- var->red.msb_right = 0;
- var->green.msb_right = 0;
- var->blue.msb_right = 0;
- var->transp.msb_right = 0;
-
- return 0;
-}
-
-/* This routine actually sets the video mode. It's in here where we
- * the hardware state info->par and fix which can be affected by the
- * change in par. For this driver it doesn't do much.
- */
-static int vfb_set_par(struct fb_info *info)
-{
- info->fix.line_length = get_line_length(info->var.xres_virtual,
- info->var.bits_per_pixel);
- return 0;
-}
-
- /*
- * Set a single color register. The values supplied are already
- * rounded down to the hardware's capabilities (according to the
- * entries in the var structure). Return != 0 for invalid regno.
- */
-
-static int vfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
- u_int transp, struct fb_info *info)
-{
- if (regno >= 256) /* no. of hw registers */
- return 1;
- /*
- * Program hardware... do anything you want with transp
- */
-
- /* grayscale works only partially under directcolor */
- if (info->var.grayscale) {
- /* grayscale = 0.30*R + 0.59*G + 0.11*B */
- red = green = blue =
- (red * 77 + green * 151 + blue * 28) >> 8;
- }
-
- /* Directcolor:
- * var->{color}.offset contains start of bitfield
- * var->{color}.length contains length of bitfield
- * {hardwarespecific} contains width of RAMDAC
- * cmap[X] is programmed to (X << red.offset) | (X << green.offset) | (X << blue.offset)
- * RAMDAC[X] is programmed to (red, green, blue)
- *
- * Pseudocolor:
- * var->{color}.offset is 0 unless the palette index takes less than
- * bits_per_pixel bits and is stored in the upper
- * bits of the pixel value
- * var->{color}.length is set so that 1 << length is the number of available
- * palette entries
- * cmap is not used
- * RAMDAC[X] is programmed to (red, green, blue)
- *
- * Truecolor:
- * does not use DAC. Usually 3 are present.
- * var->{color}.offset contains start of bitfield
- * var->{color}.length contains length of bitfield
- * cmap is programmed to (red << red.offset) | (green << green.offset) |
- * (blue << blue.offset) | (transp << transp.offset)
- * RAMDAC does not exist
- */
-#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
- switch (info->fix.visual) {
- case FB_VISUAL_TRUECOLOR:
- case FB_VISUAL_PSEUDOCOLOR:
- red = CNVT_TOHW(red, info->var.red.length);
- green = CNVT_TOHW(green, info->var.green.length);
- blue = CNVT_TOHW(blue, info->var.blue.length);
- transp = CNVT_TOHW(transp, info->var.transp.length);
- break;
- case FB_VISUAL_DIRECTCOLOR:
- red = CNVT_TOHW(red, 8); /* expect 8 bit DAC */
- green = CNVT_TOHW(green, 8);
- blue = CNVT_TOHW(blue, 8);
- /* hey, there is bug in transp handling... */
- transp = CNVT_TOHW(transp, 8);
- break;
- }
-#undef CNVT_TOHW
- /* Truecolor has hardware independent palette */
- if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
- u32 v;
-
- if (regno >= 16)
- return 1;
-
- v = (red << info->var.red.offset) |
- (green << info->var.green.offset) |
- (blue << info->var.blue.offset) |
- (transp << info->var.transp.offset);
- switch (info->var.bits_per_pixel) {
- case 8:
- break;
- case 16:
- ((u32 *) (info->pseudo_palette))[regno] = v;
- break;
- case 24:
- case 32:
- ((u32 *) (info->pseudo_palette))[regno] = v;
- break;
- }
- return 0;
- }
- return 0;
-}
-
- /*
- * Pan or Wrap the Display
- *
- * This call looks only at xoffset, yoffset and the FB_VMODE_YWRAP flag
- */
-
-static int vfb_pan_display(struct fb_var_screeninfo *var,
- struct fb_info *info)
-{
- if (var->vmode & FB_VMODE_YWRAP) {
- if (var->yoffset >= info->var.yres_virtual ||
- var->xoffset)
- return -EINVAL;
- } else {
- if (var->xoffset + info->var.xres > info->var.xres_virtual ||
- var->yoffset + info->var.yres > info->var.yres_virtual)
- return -EINVAL;
- }
- info->var.xoffset = var->xoffset;
- info->var.yoffset = var->yoffset;
- if (var->vmode & FB_VMODE_YWRAP)
- info->var.vmode |= FB_VMODE_YWRAP;
- else
- info->var.vmode &= ~FB_VMODE_YWRAP;
- return 0;
-}
-
- /*
- * Most drivers don't need their own mmap function
- */
-
-static int vfb_mmap(struct fb_info *info,
- struct vm_area_struct *vma)
-{
- unsigned long start = vma->vm_start;
- unsigned long size = vma->vm_end - vma->vm_start;
- unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
- unsigned long page, pos;
-
- if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
- return -EINVAL;
- if (size > info->fix.smem_len)
- return -EINVAL;
- if (offset > info->fix.smem_len - size)
- return -EINVAL;
-
- pos = (unsigned long)info->fix.smem_start + offset;
-
- while (size > 0) {
- page = vmalloc_to_pfn((void *)pos);
- if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
- return -EAGAIN;
- }
- start += PAGE_SIZE;
- pos += PAGE_SIZE;
- if (size > PAGE_SIZE)
- size -= PAGE_SIZE;
- else
- size = 0;
- }
-
- return 0;
-
-}
-
-#ifndef MODULE
-/*
- * The virtual framebuffer driver is only enabled if explicitly
- * requested by passing 'video=vfb:' (or any actual options).
- */
-static int __init vfb_setup(char *options)
-{
- char *this_opt;
-
- vfb_enable = 0;
-
- if (!options)
- return 1;
-
- vfb_enable = 1;
-
- if (!*options)
- return 1;
-
- while ((this_opt = strsep(&options, ",")) != NULL) {
- if (!*this_opt)
- continue;
- /* Test disable for backwards compatibility */
- if (!strcmp(this_opt, "disable"))
- vfb_enable = 0;
- }
- return 1;
-}
-#endif /* MODULE */
-
- /*
- * Initialisation
- */
-
-static int vfb_probe(struct platform_device *dev)
-{
- struct fb_info *info;
- int retval = -ENOMEM;
-
- /*
- * For real video cards we use ioremap.
- */
- if (!(videomemory = rvmalloc(videomemorysize)))
- return retval;
-
- /*
- * VFB must clear memory to prevent kernel info
- * leakage into userspace
- * VGA-based drivers MUST NOT clear memory if
- * they want to be able to take over vgacon
- */
- memset(videomemory, 0, videomemorysize);
-
- info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
- if (!info)
- goto err;
-
- info->screen_base = (char __iomem *)videomemory;
- info->fbops = &vfb_ops;
-
- retval = fb_find_mode(&info->var, info, NULL,
- NULL, 0, NULL, 8);
-
- if (!retval || (retval == 4))
- info->var = vfb_default;
- vfb_fix.smem_start = (unsigned long) videomemory;
- vfb_fix.smem_len = videomemorysize;
- info->fix = vfb_fix;
- info->pseudo_palette = info->par;
- info->par = NULL;
- info->flags = FBINFO_FLAG_DEFAULT;
-
- retval = fb_alloc_cmap(&info->cmap, 256, 0);
- if (retval < 0)
- goto err1;
-
- retval = register_framebuffer(info);
- if (retval < 0)
- goto err2;
- platform_set_drvdata(dev, info);
-
- fb_info(info, "Virtual frame buffer device, using %ldK of video memory\n",
- videomemorysize >> 10);
- return 0;
-err2:
- fb_dealloc_cmap(&info->cmap);
-err1:
- framebuffer_release(info);
-err:
- rvfree(videomemory, videomemorysize);
- return retval;
-}
-
-static int vfb_remove(struct platform_device *dev)
-{
- struct fb_info *info = platform_get_drvdata(dev);
-
- if (info) {
- unregister_framebuffer(info);
- rvfree(videomemory, videomemorysize);
- fb_dealloc_cmap(&info->cmap);
- framebuffer_release(info);
- }
- return 0;
-}
-
-static struct platform_driver vfb_driver = {
- .probe = vfb_probe,
- .remove = vfb_remove,
- .driver = {
- .name = "vfb",
- },
-};
-
-static struct platform_device *vfb_device;
-
-static int __init vfb_init(void)
-{
- int ret = 0;
-
-#ifndef MODULE
- char *option = NULL;
-
- if (fb_get_options("vfb", &option))
- return -ENODEV;
- vfb_setup(option);
-#endif
-
- if (!vfb_enable)
- return -ENXIO;
-
- ret = platform_driver_register(&vfb_driver);
-
- if (!ret) {
- vfb_device = platform_device_alloc("vfb", 0);
-
- if (vfb_device)
- ret = platform_device_add(vfb_device);
- else
- ret = -ENOMEM;
-
- if (ret) {
- platform_device_put(vfb_device);
- platform_driver_unregister(&vfb_driver);
- }
- }
-
- return ret;
-}
-
-module_init(vfb_init);
-
-#ifdef MODULE
-static void __exit vfb_exit(void)
-{
- platform_device_unregister(vfb_device);
- platform_driver_unregister(&vfb_driver);
-}
-
-module_exit(vfb_exit);
-
-MODULE_LICENSE("GPL");
-#endif /* MODULE */