[PATCH] imacfb: Add Intel-based Macintosh Framebuffer Support (90b4f9ac) · Commits · 戴 / test

drivers/video/Kconfig

+9 −0

Original line number	Diff line number	Diff line
		@@ -550,6 +550,15 @@ config FB_VESA
		You will get a boot time penguin logo at no additional cost. Please
		read <file:Documentation/fb/vesafb.txt>. If unsure, say Y.

		config FB_IMAC
		bool "Intel-based Macintosh Framebuffer Support"
		depends on (FB = y) && X86
		select FB_CFB_FILLRECT
		select FB_CFB_COPYAREA
		select FB_CFB_IMAGEBLIT
		help
		This is the frame buffer device driver for the Intel-based Macintosh

		config FB_HGA
		tristate "Hercules mono graphics support"
		depends on FB && X86

drivers/video/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -97,6 +97,7 @@ obj-$(CONFIG_FB_S3C2410) += s3c2410fb.o

		# Platform or fallback drivers go here
		obj-$(CONFIG_FB_VESA) += vesafb.o
		obj-$(CONFIG_FB_IMAC) += imacfb.o
		obj-$(CONFIG_FB_VGA16) += vga16fb.o vgastate.o
		obj-$(CONFIG_FB_OF) += offb.o

drivers/video/imacfb.c

0 → 100644

+345 −0

Original line number	Diff line number	Diff line
		/*
		* framebuffer driver for Intel Based Mac's
		*
		* (c) 2006 Edgar Hucek <gimli@dark-green.com>
		* Original imac driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
		*
		*/

		#include <linux/delay.h>
		#include <linux/errno.h>
		#include <linux/fb.h>
		#include <linux/kernel.h>
		#include <linux/init.h>
		#include <linux/ioport.h>
		#include <linux/mm.h>
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/slab.h>
		#include <linux/string.h>
		#include <linux/tty.h>

		#include <asm/io.h>

		#include <video/vga.h>

		typedef enum _MAC_TYPE {
		M_I17,
		M_I20,
		M_MINI,
		M_MACBOOK,
		M_NEW
		} MAC_TYPE;

		/* --------------------------------------------------------------------- */

		static struct fb_var_screeninfo imacfb_defined __initdata = {
		.activate = FB_ACTIVATE_NOW,
		.height = -1,
		.width = -1,
		.right_margin = 32,
		.upper_margin = 16,
		.lower_margin = 4,
		.vsync_len = 4,
		.vmode = FB_VMODE_NONINTERLACED,
		};

		static struct fb_fix_screeninfo imacfb_fix __initdata = {
		.id = "IMAC VGA",
		.type = FB_TYPE_PACKED_PIXELS,
		.accel = FB_ACCEL_NONE,
		.visual = FB_VISUAL_TRUECOLOR,
		};

		static int inverse;
		static int model = M_NEW;
		static int manual_height;
		static int manual_width;

		#define DEFAULT_FB_MEM 1024102416

		/* --------------------------------------------------------------------- */

		static int imacfb_setcolreg(unsigned regno, unsigned red, unsigned green,
		unsigned blue, unsigned transp,
		struct fb_info *info)
		{
		/*
		* 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.
		*/

		if (regno >= info->cmap.len)
		return 1;

		if (regno < 16) {
		red >>= 8;
		green >>= 8;
		blue >>= 8;
		((u32 *)(info->pseudo_palette))[regno] =
		(red << info->var.red.offset) \|
		(green << info->var.green.offset) \|
		(blue << info->var.blue.offset);
		}
		return 0;
		}

		static struct fb_ops imacfb_ops = {
		.owner = THIS_MODULE,
		.fb_setcolreg = imacfb_setcolreg,
		.fb_fillrect = cfb_fillrect,
		.fb_copyarea = cfb_copyarea,
		.fb_imageblit = cfb_imageblit,
		};

		static int __init imacfb_setup(char *options)
		{
		char *this_opt;

		if (!options \|\| !*options)
		return 0;

		while ((this_opt = strsep(&options, ",")) != NULL) {
		if (!*this_opt) continue;

		if (!strcmp(this_opt, "inverse"))
		inverse = 1;
		else if (!strcmp(this_opt, "i17"))
		model = M_I17;
		else if (!strcmp(this_opt, "i20"))
		model = M_I20;
		else if (!strcmp(this_opt, "mini"))
		model = M_MINI;
		else if (!strcmp(this_opt, "macbook"))
		model = M_MACBOOK;
		else if (!strncmp(this_opt, "height:", 7))
		manual_height = simple_strtoul(this_opt+7, NULL, 0);
		else if (!strncmp(this_opt, "width:", 6))
		manual_width = simple_strtoul(this_opt+6, NULL, 0);
		}
		return 0;
		}

		static int __init imacfb_probe(struct platform_device *dev)
		{
		struct fb_info *info;
		int err;
		unsigned int size_vmode;
		unsigned int size_remap;
		unsigned int size_total;

		screen_info.lfb_depth = 32;
		screen_info.lfb_size = DEFAULT_FB_MEM / 0x10000;
		screen_info.pages=1;
		screen_info.blue_size = 8;
		screen_info.blue_pos = 0;
		screen_info.green_size = 8;
		screen_info.green_pos = 8;
		screen_info.red_size = 8;
		screen_info.red_pos = 16;
		screen_info.rsvd_size = 8;
		screen_info.rsvd_pos = 24;

		switch (model) {
		case M_I17:
		screen_info.lfb_width = 1440;
		screen_info.lfb_height = 900;
		screen_info.lfb_linelength = 1472 * 4;
		screen_info.lfb_base = 0x80010000;
		break;
		case M_NEW:
		case M_I20:
		screen_info.lfb_width = 1680;
		screen_info.lfb_height = 1050;
		screen_info.lfb_linelength = 1728 * 4;
		screen_info.lfb_base = 0x80010000;
		break;
		case M_MINI:
		screen_info.lfb_width = 1024;
		screen_info.lfb_height = 768;
		screen_info.lfb_linelength = 2048 * 4;
		screen_info.lfb_base = 0x80000000;
		break;
		case M_MACBOOK:
		screen_info.lfb_width = 1280;
		screen_info.lfb_height = 800;
		screen_info.lfb_linelength = 2048 * 4;
		screen_info.lfb_base = 0x80000000;
		break;
		}

		/* if the user wants to manually specify height/width,
		we will override the defaults */
		/* TODO: eventually get auto-detection working */
		if (manual_height > 0)
		screen_info.lfb_height = manual_height;
		if (manual_width > 0)
		screen_info.lfb_width = manual_width;

		imacfb_fix.smem_start = screen_info.lfb_base;
		imacfb_defined.bits_per_pixel = screen_info.lfb_depth;
		imacfb_defined.xres = screen_info.lfb_width;
		imacfb_defined.yres = screen_info.lfb_height;
		imacfb_fix.line_length = screen_info.lfb_linelength;

		/* size_vmode -- that is the amount of memory needed for the
		* used video mode, i.e. the minimum amount of
		* memory we need. */
		size_vmode = imacfb_defined.yres * imacfb_fix.line_length;

		/* size_total -- all video memory we have. Used for
		* entries, ressource allocation and bounds
		* checking. */
		size_total = screen_info.lfb_size * 65536;
		if (size_total < size_vmode)
		size_total = size_vmode;

		/* size_remap -- the amount of video memory we are going to
		* use for imacfb. With modern cards it is no
		* option to simply use size_total as that
		* wastes plenty of kernel address space. */
		size_remap = size_vmode * 2;
		if (size_remap < size_vmode)
		size_remap = size_vmode;
		if (size_remap > size_total)
		size_remap = size_total;
		imacfb_fix.smem_len = size_remap;

		#ifndef __i386__
		screen_info.imacpm_seg = 0;
		#endif

		if (!request_mem_region(imacfb_fix.smem_start, size_total, "imacfb")) {
		printk(KERN_WARNING
		"imacfb: cannot reserve video memory at 0x%lx\n",
		imacfb_fix.smem_start);
		/* We cannot make this fatal. Sometimes this comes from magic
		spaces our resource handlers simply don't know about */
		}

		info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
		if (!info) {
		err = -ENOMEM;
		goto err_release_mem;
		}
		info->pseudo_palette = info->par;
		info->par = NULL;

		info->screen_base = ioremap(imacfb_fix.smem_start, imacfb_fix.smem_len);
		if (!info->screen_base) {
		printk(KERN_ERR "imacfb: abort, cannot ioremap video memory "
		"0x%x @ 0x%lx\n",
		imacfb_fix.smem_len, imacfb_fix.smem_start);
		err = -EIO;
		goto err_unmap;
		}

		printk(KERN_INFO "imacfb: framebuffer at 0x%lx, mapped to 0x%p, "
		"using %dk, total %dk\n",
		imacfb_fix.smem_start, info->screen_base,
		size_remap/1024, size_total/1024);
		printk(KERN_INFO "imacfb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
		imacfb_defined.xres, imacfb_defined.yres,
		imacfb_defined.bits_per_pixel, imacfb_fix.line_length,
		screen_info.pages);

		imacfb_defined.xres_virtual = imacfb_defined.xres;
		imacfb_defined.yres_virtual = imacfb_fix.smem_len /
		imacfb_fix.line_length;
		printk(KERN_INFO "imacfb: scrolling: redraw\n");
		imacfb_defined.yres_virtual = imacfb_defined.yres;

		/* some dummy values for timing to make fbset happy */
		imacfb_defined.pixclock = 10000000 / imacfb_defined.xres *
		1000 / imacfb_defined.yres;
		imacfb_defined.left_margin = (imacfb_defined.xres / 8) & 0xf8;
		imacfb_defined.hsync_len = (imacfb_defined.xres / 8) & 0xf8;

		imacfb_defined.red.offset = screen_info.red_pos;
		imacfb_defined.red.length = screen_info.red_size;
		imacfb_defined.green.offset = screen_info.green_pos;
		imacfb_defined.green.length = screen_info.green_size;
		imacfb_defined.blue.offset = screen_info.blue_pos;
		imacfb_defined.blue.length = screen_info.blue_size;
		imacfb_defined.transp.offset = screen_info.rsvd_pos;
		imacfb_defined.transp.length = screen_info.rsvd_size;

		printk(KERN_INFO "imacfb: %s: "
		"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
		"Truecolor",
		screen_info.rsvd_size,
		screen_info.red_size,
		screen_info.green_size,
		screen_info.blue_size,
		screen_info.rsvd_pos,
		screen_info.red_pos,
		screen_info.green_pos,
		screen_info.blue_pos);

		imacfb_fix.ypanstep = 0;
		imacfb_fix.ywrapstep = 0;

		/* request failure does not faze us, as vgacon probably has this
		* region already (FIXME) */
		request_region(0x3c0, 32, "imacfb");

		info->fbops = &imacfb_ops;
		info->var = imacfb_defined;
		info->fix = imacfb_fix;
		info->flags = FBINFO_FLAG_DEFAULT;

		if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
		err = -ENOMEM;
		goto err_unmap;
		}
		if (register_framebuffer(info)<0) {
		err = -EINVAL;
		goto err_fb_dealoc;
		}
		printk(KERN_INFO "fb%d: %s frame buffer device\n",
		info->node, info->fix.id);
		return 0;

		err_fb_dealoc:
		fb_dealloc_cmap(&info->cmap);
		err_unmap:
		iounmap(info->screen_base);
		framebuffer_release(info);
		err_release_mem:
		release_mem_region(imacfb_fix.smem_start, size_total);
		return err;
		}

		static struct platform_driver imacfb_driver = {
		.probe = imacfb_probe,
		.driver = {
		.name = "imacfb",
		},
		};

		static struct platform_device imacfb_device = {
		.name = "imacfb",
		};

		static int __init imacfb_init(void)
		{
		int ret;
		char *option = NULL;

		/* ignore error return of fb_get_options */
		fb_get_options("imacfb", &option);
		imacfb_setup(option);
		ret = platform_driver_register(&imacfb_driver);

		if (!ret) {
		ret = platform_device_register(&imacfb_device);
		if (ret)
		platform_driver_unregister(&imacfb_driver);
		}
		return ret;
		}
		module_init(imacfb_init);

		MODULE_LICENSE("GPL");

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