diff options
Diffstat (limited to 'drivers/video/simplefb.c')
| -rw-r--r-- | drivers/video/simplefb.c | 234 |
1 files changed, 0 insertions, 234 deletions
diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c deleted file mode 100644 index e2e9e3e61b72..000000000000 --- a/drivers/video/simplefb.c +++ /dev/null @@ -1,234 +0,0 @@ -/* - * Simplest possible simple frame-buffer driver, as a platform device - * - * Copyright (c) 2013, Stephen Warren - * - * Based on q40fb.c, which was: - * Copyright (C) 2001 Richard Zidlicky <rz@linux-m68k.org> - * - * Also based on offb.c, which was: - * Copyright (C) 1997 Geert Uytterhoeven - * Copyright (C) 1996 Paul Mackerras - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - */ - -#include <linux/errno.h> -#include <linux/fb.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/platform_device.h> - -static struct fb_fix_screeninfo simplefb_fix = { - .id = "simple", - .type = FB_TYPE_PACKED_PIXELS, - .visual = FB_VISUAL_TRUECOLOR, - .accel = FB_ACCEL_NONE, -}; - -static struct fb_var_screeninfo simplefb_var = { - .height = -1, - .width = -1, - .activate = FB_ACTIVATE_NOW, - .vmode = FB_VMODE_NONINTERLACED, -}; - -static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, - u_int transp, struct fb_info *info) -{ - u32 *pal = info->pseudo_palette; - u32 cr = red >> (16 - info->var.red.length); - u32 cg = green >> (16 - info->var.green.length); - u32 cb = blue >> (16 - info->var.blue.length); - u32 value; - - if (regno >= 16) - return -EINVAL; - - value = (cr << info->var.red.offset) | - (cg << info->var.green.offset) | - (cb << info->var.blue.offset); - if (info->var.transp.length > 0) { - u32 mask = (1 << info->var.transp.length) - 1; - mask <<= info->var.transp.offset; - value |= mask; - } - pal[regno] = value; - - return 0; -} - -static struct fb_ops simplefb_ops = { - .owner = THIS_MODULE, - .fb_setcolreg = simplefb_setcolreg, - .fb_fillrect = cfb_fillrect, - .fb_copyarea = cfb_copyarea, - .fb_imageblit = cfb_imageblit, -}; - -struct simplefb_format { - const char *name; - u32 bits_per_pixel; - struct fb_bitfield red; - struct fb_bitfield green; - struct fb_bitfield blue; - struct fb_bitfield transp; -}; - -static struct simplefb_format simplefb_formats[] = { - { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0} }, -}; - -struct simplefb_params { - u32 width; - u32 height; - u32 stride; - struct simplefb_format *format; -}; - -static int simplefb_parse_dt(struct platform_device *pdev, - struct simplefb_params *params) -{ - struct device_node *np = pdev->dev.of_node; - int ret; - const char *format; - int i; - - ret = of_property_read_u32(np, "width", ¶ms->width); - if (ret) { - dev_err(&pdev->dev, "Can't parse width property\n"); - return ret; - } - - ret = of_property_read_u32(np, "height", ¶ms->height); - if (ret) { - dev_err(&pdev->dev, "Can't parse height property\n"); - return ret; - } - - ret = of_property_read_u32(np, "stride", ¶ms->stride); - if (ret) { - dev_err(&pdev->dev, "Can't parse stride property\n"); - return ret; - } - - ret = of_property_read_string(np, "format", &format); - if (ret) { - dev_err(&pdev->dev, "Can't parse format property\n"); - return ret; - } - params->format = NULL; - for (i = 0; i < ARRAY_SIZE(simplefb_formats); i++) { - if (strcmp(format, simplefb_formats[i].name)) - continue; - params->format = &simplefb_formats[i]; - break; - } - if (!params->format) { - dev_err(&pdev->dev, "Invalid format value\n"); - return -EINVAL; - } - - return 0; -} - -static int simplefb_probe(struct platform_device *pdev) -{ - int ret; - struct simplefb_params params; - struct fb_info *info; - struct resource *mem; - - if (fb_get_options("simplefb", NULL)) - return -ENODEV; - - ret = simplefb_parse_dt(pdev, ¶ms); - if (ret) - return ret; - - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) { - dev_err(&pdev->dev, "No memory resource\n"); - return -EINVAL; - } - - info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev); - if (!info) - return -ENOMEM; - platform_set_drvdata(pdev, info); - - info->fix = simplefb_fix; - info->fix.smem_start = mem->start; - info->fix.smem_len = resource_size(mem); - info->fix.line_length = params.stride; - - info->var = simplefb_var; - info->var.xres = params.width; - info->var.yres = params.height; - info->var.xres_virtual = params.width; - info->var.yres_virtual = params.height; - info->var.bits_per_pixel = params.format->bits_per_pixel; - info->var.red = params.format->red; - info->var.green = params.format->green; - info->var.blue = params.format->blue; - info->var.transp = params.format->transp; - - info->fbops = &simplefb_ops; - info->flags = FBINFO_DEFAULT; - info->screen_base = devm_ioremap(&pdev->dev, info->fix.smem_start, - info->fix.smem_len); - if (!info->screen_base) { - framebuffer_release(info); - return -ENODEV; - } - info->pseudo_palette = (void *)(info + 1); - - ret = register_framebuffer(info); - if (ret < 0) { - dev_err(&pdev->dev, "Unable to register simplefb: %d\n", ret); - framebuffer_release(info); - return ret; - } - - dev_info(&pdev->dev, "fb%d: simplefb registered!\n", info->node); - - return 0; -} - -static int simplefb_remove(struct platform_device *pdev) -{ - struct fb_info *info = platform_get_drvdata(pdev); - - unregister_framebuffer(info); - framebuffer_release(info); - - return 0; -} - -static const struct of_device_id simplefb_of_match[] = { - { .compatible = "simple-framebuffer", }, - { }, -}; -MODULE_DEVICE_TABLE(of, simplefb_of_match); - -static struct platform_driver simplefb_driver = { - .driver = { - .name = "simple-framebuffer", - .owner = THIS_MODULE, - .of_match_table = simplefb_of_match, - }, - .probe = simplefb_probe, - .remove = simplefb_remove, -}; -module_platform_driver(simplefb_driver); - -MODULE_AUTHOR("Stephen Warren <swarren@wwwdotorg.org>"); -MODULE_DESCRIPTION("Simple framebuffer driver"); -MODULE_LICENSE("GPL v2"); |