Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 90b4f9ac authored by Edgar Hucek's avatar Edgar Hucek Committed by Linus Torvalds
Browse files

[PATCH] imacfb: Add Intel-based Macintosh Framebuffer Support 



This patch adds a new framebuffer driver for the Intel Based macs.  This
framebuffer is needed when booting from EFI to get something out the box.

[akpm: note: doesn't support modular building]

[akpm@osdl.org: cleanups]
Signed-off-by: default avatarEdgar Hucek <hostmaster@ed-soft.at>
Signed-off-by: default avatarAntonino Daplas <adaplas@pol.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 1a8c9795

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	1024*1024*16



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



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");