/*
* 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/screen_info.h>
#include <linux/slab.h>
#include <linux/string.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;
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");
