[PATCH 1/1] New Framebuffer for Intel based Macs
From: Edgar Hucek
Date: Tue Jun 20 2006 - 09:36:02 EST
This patch add a new framebuffer driver for the Intel Based macs.
This framebuffer is needed when booting from EFI to get something
out the box ;)
Signed-off-by: Edgar Hucek <hostmaster@xxxxxxxxxx>
diff -uNr linux-2.6.17.orig/drivers/video/imacfb.c linux-2.6.17/drivers/video/imacfb.c
--- linux-2.6.17.orig/drivers/video/imacfb.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.17/drivers/video/imacfb.c 2006-06-18 11:46:13.000000000 +0200
@@ -0,0 +1,436 @@
+/*
+ * framebuffer driver for Intel Based Mac's
+ *
+ * (c) 2006 Edgar Hucek <gimli@xxxxxxxxxxxxxx>
+ * Original vesa driver written by Gerd Knorr <kraxel@xxxxxxxxxxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <video/vga.h>
+#include <asm/io.h>
+#include <asm/mtrr.h>
+
+#define dac_reg (0x3c8)
+#define dac_val (0x3c9)
+
+typedef enum _MAC_TAPE {
+ M_I17,
+ M_I20,
+ M_MINI,
+ M_MACBOOK,
+ M_NEW
+} MAC_TAPE;
+
+/* --------------------------------------------------------------------- */
+
+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,
+};
+
+static int inverse = 0;
+static int mtrr = 0; /* disable mtrr */
+static int vram_remap __initdata = 0; /* Set amount of memory to be used */
+static int vram_total __initdata = 0; /* Set total amount of memory */
+static int depth;
+static int model = M_NEW;
+static int manual_height = 0;
+static int manual_width = 0;
+
+/* --------------------------------------------------------------------- */
+
+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 && info->var.bits_per_pixel != 8) {
+ switch (info->var.bits_per_pixel) {
+ case 16:
+ if (info->var.red.offset == 10) {
+ /* 1:5:5:5 */
+ ((u32*) (info->pseudo_palette))[regno] =
+ ((red & 0xf800) >> 1) |
+ ((green & 0xf800) >> 6) |
+ ((blue & 0xf800) >> 11);
+ } else {
+ /* 0:5:6:5 */
+ ((u32*) (info->pseudo_palette))[regno] =
+ ((red & 0xf800) ) |
+ ((green & 0xfc00) >> 5) |
+ ((blue & 0xf800) >> 11);
+ }
+ break;
+ case 24:
+ case 32:
+ 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);
+ break;
+ }
+ }
+
+ 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 (! strncmp(this_opt, "mtrr:", 5))
+ mtrr = simple_strtoul(this_opt+5, NULL, 0);
+ else if (! strcmp(this_opt, "nomtrr"))
+ mtrr=0;
+ else if (! strncmp(this_opt, "vtotal:", 7))
+ vram_total = simple_strtoul(this_opt+7, NULL, 0);
+ else if (! strncmp(this_opt, "vremap:", 7))
+ vram_remap = simple_strtoul(this_opt+7, NULL, 0);
+ 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;
+}
+
+#define DEFAULT_FB_MEM 1024*1024*16
+
+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;
+
+ /*
+ static void *videomemory;
+ static u_long videomemorysize = (64*1024*1024);
+ videomemory = ioremap(0x80000000,videomemorysize);
+ memset(videomemory, 0x99, videomemorysize);
+ */
+
+ imacfb_fix.smem_start = screen_info.lfb_base;
+ imacfb_defined.bits_per_pixel = screen_info.lfb_depth;
+ if (15 == imacfb_defined.bits_per_pixel)
+ imacfb_defined.bits_per_pixel = 16;
+ imacfb_defined.xres = screen_info.lfb_width;
+ imacfb_defined.yres = screen_info.lfb_height;
+ imacfb_fix.line_length = screen_info.lfb_linelength;
+ imacfb_fix.visual = (imacfb_defined.bits_per_pixel == 8) ?
+ FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+
+ /* 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 mtrr
+ * entries, ressource allocation and bounds
+ * checking. */
+ size_total = screen_info.lfb_size * 65536;
+ if (vram_total)
+ size_total = vram_total * 1024 * 1024;
+ 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 (vram_remap)
+ size_remap = vram_remap * 1024 * 1024;
+ 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) * 256, &dev->dev);
+ if (!info) {
+ release_mem_region(imacfb_fix.smem_start, size_total);
+ return -ENOMEM;
+ }
+ 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;
+ }
+
+ 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;
+
+ if (imacfb_defined.bits_per_pixel <= 8) {
+ depth = imacfb_defined.green.length;
+ imacfb_defined.red.length =
+ imacfb_defined.green.length =
+ imacfb_defined.blue.length =
+ imacfb_defined.bits_per_pixel;
+ }
+
+ printk(KERN_INFO "imacfb: %s: "
+ "size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
+ (imacfb_defined.bits_per_pixel > 8) ?
+ "Truecolor" : "Pseudocolor",
+ 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");
+
+#ifdef CONFIG_MTRR
+ if (mtrr) {
+ unsigned int temp_size = size_total;
+ unsigned int type = 0;
+
+ switch (mtrr) {
+ case 1:
+ type = MTRR_TYPE_UNCACHABLE;
+ break;
+ case 2:
+ type = MTRR_TYPE_WRBACK;
+ break;
+ case 3:
+ type = MTRR_TYPE_WRCOMB;
+ break;
+ case 4:
+ type = MTRR_TYPE_WRTHROUGH;
+ break;
+ default:
+ type = 0;
+ break;
+ }
+
+ if (type) {
+ int rc;
+
+ /* Find the largest power-of-two */
+ while (temp_size & (temp_size - 1))
+ temp_size &= (temp_size - 1);
+
+ /* Try and find a power of two to add */
+ do {
+ rc = mtrr_add(imacfb_fix.smem_start, temp_size,
+ type, 1);
+ temp_size >>= 1;
+ } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
+ }
+ }
+#endif
+
+ 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;
+ }
+ if (register_framebuffer(info)<0) {
+ err = -EINVAL;
+ fb_dealloc_cmap(&info->cmap);
+ goto err;
+ }
+ printk(KERN_INFO "fb%d: %s frame buffer device\n",
+ info->node, info->fix.id);
+ return 0;
+err:
+ framebuffer_release(info);
+ 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");
diff -uNr linux-2.6.17.orig/drivers/video/Kconfig linux-2.6.17/drivers/video/Kconfig
--- linux-2.6.17.orig/drivers/video/Kconfig 2006-06-18 11:45:31.000000000 +0200
+++ linux-2.6.17/drivers/video/Kconfig 2006-06-18 11:46:03.000000000 +0200
@@ -483,6 +483,15 @@
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 Macs FB"
+ 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 Inel Based Mac's
+
config VIDEO_SELECT
bool
depends on FB_VESA
diff -uNr linux-2.6.17.orig/drivers/video/Makefile linux-2.6.17/drivers/video/Makefile
--- linux-2.6.17.orig/drivers/video/Makefile 2006-06-18 11:45:31.000000000 +0200
+++ linux-2.6.17/drivers/video/Makefile 2006-06-18 11:46:03.000000000 +0200
@@ -97,6 +97,7 @@
# 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