diff options
author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-02-13 17:31:38 +0400 |
---|---|---|
committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-04-17 09:10:19 +0400 |
commit | f7018c21350204c4cf628462f229d44d03545254 (patch) | |
tree | 408787177164cf51cc06f7aabdb04fcff8d2b6aa /drivers/video/vfb.c | |
parent | c26ef3eb3c11274bad1b64498d0a134f85755250 (diff) | |
download | linux-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.c | 610 |
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 */ |