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linux/drivers/video/efifb.c
Luke Macken a5757c2a47 efifb: support the EFI framebuffer on more Apple hardware 
Enable the EFI framebuffer on 14 more Macs, including the iMac11,1
iMac10,1 iMac8,1 Macmini3,1 Macmini4,1 MacBook5,1 MacBook6,1 MacBook7,1
MacBookPro2,2 MacBookPro5,2 MacBookPro5,3 MacBookPro6,1 MacBookPro6,2 and
MacBookPro7,1

Information gathered from various user submissions.

    https://bugzilla.redhat.com/show_bug.cgi?id=528232
    http://ubuntuforums.org/showthread.php?t=1557326

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Luke Macken <lmacken@redhat.com>
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-09-22 17:22:39 -07:00

508 lines
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/*
* Framebuffer driver for EFI/UEFI based system
*
* (c) 2006 Edgar Hucek <gimli@dark-green.com>
* Original efi driver written by Gerd Knorr <kraxel@goldbach.in-berlin.de>
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/dmi.h>
#include <linux/pci.h>
#include <video/vga.h>
static struct fb_var_screeninfo efifb_defined __devinitdata = {
.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 efifb_fix __devinitdata = {
.id = "EFI VGA",
.type = FB_TYPE_PACKED_PIXELS,
.accel = FB_ACCEL_NONE,
.visual = FB_VISUAL_TRUECOLOR,
};
enum {
M_I17, /* 17-Inch iMac */
M_I20, /* 20-Inch iMac */
M_I20_SR, /* 20-Inch iMac (Santa Rosa) */
M_I24, /* 24-Inch iMac */
M_I24_8_1, /* 24-Inch iMac, 8,1th gen */
M_I24_10_1, /* 24-Inch iMac, 10,1th gen */
M_I27_11_1, /* 27-Inch iMac, 11,1th gen */
M_MINI, /* Mac Mini */
M_MINI_3_1, /* Mac Mini, 3,1th gen */
M_MINI_4_1, /* Mac Mini, 4,1th gen */
M_MB, /* MacBook */
M_MB_2, /* MacBook, 2nd rev. */
M_MB_3, /* MacBook, 3rd rev. */
M_MB_5_1, /* MacBook, 5th rev. */
M_MB_6_1, /* MacBook, 6th rev. */
M_MB_7_1, /* MacBook, 7th rev. */
M_MB_SR, /* MacBook, 2nd gen, (Santa Rosa) */
M_MBA, /* MacBook Air */
M_MBP, /* MacBook Pro */
M_MBP_2, /* MacBook Pro 2nd gen */
M_MBP_2_2, /* MacBook Pro 2,2nd gen */
M_MBP_SR, /* MacBook Pro (Santa Rosa) */
M_MBP_4, /* MacBook Pro, 4th gen */
M_MBP_5_1, /* MacBook Pro, 5,1th gen */
M_MBP_5_2, /* MacBook Pro, 5,2th gen */
M_MBP_5_3, /* MacBook Pro, 5,3rd gen */
M_MBP_6_1, /* MacBook Pro, 6,1th gen */
M_MBP_6_2, /* MacBook Pro, 6,2th gen */
M_MBP_7_1, /* MacBook Pro, 7,1th gen */
M_UNKNOWN /* placeholder */
};
static struct efifb_dmi_info {
char *optname;
unsigned long base;
int stride;
int width;
int height;
} dmi_list[] __initdata = {
[M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900 },
[M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050 }, /* guess */
[M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050 },
[M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200 }, /* guess */
[M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200 },
[M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080 },
[M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440 },
[M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768 },
[M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768 },
[M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200 },
[M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800 },
[M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800 },
[M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800 },
[M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800 },
[M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800 },
[M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900 },
[M_MBP_2] = { "mbp2", 0, 0, 0, 0 }, /* placeholder */
[M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900 },
[M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900 },
[M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200 },
[M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900 },
[M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200 },
[M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900 },
[M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200 },
[M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050 },
[M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800 },
[M_UNKNOWN] = { NULL, 0, 0, 0, 0 }
};
static int set_system(const struct dmi_system_id *id);
#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
{ set_system, name, { \
DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
DMI_MATCH(DMI_PRODUCT_NAME, name) }, \
&dmi_list[enumid] }
static const struct dmi_system_id dmi_system_table[] __initconst = {
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
{},
};
static int set_system(const struct dmi_system_id *id)
{
struct efifb_dmi_info *info = id->driver_data;
if (info->base == 0)
return 0;
printk(KERN_INFO "efifb: dmi detected %s - framebuffer at %p "
"(%dx%d, stride %d)\n", id->ident,
(void *)info->base, info->width, info->height,
info->stride);
/* Trust the bootloader over the DMI tables */
if (screen_info.lfb_base == 0) {
#if defined(CONFIG_PCI)
struct pci_dev *dev = NULL;
int found_bar = 0;
#endif
screen_info.lfb_base = info->base;
#if defined(CONFIG_PCI)
/* make sure that the address in the table is actually on a
* VGA device's PCI BAR */
for_each_pci_dev(dev) {
int i;
if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
continue;
for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
resource_size_t start, end;
start = pci_resource_start(dev, i);
if (start == 0)
break;
end = pci_resource_end(dev, i);
if (screen_info.lfb_base >= start &&
screen_info.lfb_base < end) {
found_bar = 1;
}
}
}
if (!found_bar)
screen_info.lfb_base = 0;
#endif
}
if (screen_info.lfb_base) {
if (screen_info.lfb_linelength == 0)
screen_info.lfb_linelength = info->stride;
if (screen_info.lfb_width == 0)
screen_info.lfb_width = info->width;
if (screen_info.lfb_height == 0)
screen_info.lfb_height = info->height;
if (screen_info.orig_video_isVGA == 0)
screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
} else {
screen_info.lfb_linelength = 0;
screen_info.lfb_width = 0;
screen_info.lfb_height = 0;
screen_info.orig_video_isVGA = 0;
return 0;
}
return 1;
}
static int efifb_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 void efifb_destroy(struct fb_info *info)
{
if (info->screen_base)
iounmap(info->screen_base);
release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
framebuffer_release(info);
}
static struct fb_ops efifb_ops = {
.owner = THIS_MODULE,
.fb_destroy = efifb_destroy,
.fb_setcolreg = efifb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int __init efifb_setup(char *options)
{
char *this_opt;
int i;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt) continue;
for (i = 0; i < M_UNKNOWN; i++) {
if (!strcmp(this_opt, dmi_list[i].optname) &&
dmi_list[i].base != 0) {
screen_info.lfb_base = dmi_list[i].base;
screen_info.lfb_linelength = dmi_list[i].stride;
screen_info.lfb_width = dmi_list[i].width;
screen_info.lfb_height = dmi_list[i].height;
}
}
if (!strncmp(this_opt, "base:", 5))
screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "stride:", 7))
screen_info.lfb_linelength = simple_strtoul(this_opt+7, NULL, 0) * 4;
else if (!strncmp(this_opt, "height:", 7))
screen_info.lfb_height = simple_strtoul(this_opt+7, NULL, 0);
else if (!strncmp(this_opt, "width:", 6))
screen_info.lfb_width = simple_strtoul(this_opt+6, NULL, 0);
}
return 0;
}
static int __devinit efifb_probe(struct platform_device *dev)
{
struct fb_info *info;
int err;
unsigned int size_vmode;
unsigned int size_remap;
unsigned int size_total;
int request_succeeded = 0;
if (!screen_info.lfb_depth)
screen_info.lfb_depth = 32;
if (!screen_info.pages)
screen_info.pages = 1;
if (!screen_info.lfb_base) {
printk(KERN_DEBUG "efifb: invalid framebuffer address\n");
return -ENODEV;
}
printk(KERN_INFO "efifb: probing for efifb\n");
/* just assume they're all unset if any are */
if (!screen_info.blue_size) {
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;
}
efifb_fix.smem_start = screen_info.lfb_base;
efifb_defined.bits_per_pixel = screen_info.lfb_depth;
efifb_defined.xres = screen_info.lfb_width;
efifb_defined.yres = screen_info.lfb_height;
efifb_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 = efifb_defined.yres * efifb_fix.line_length;
/* size_total -- all video memory we have. Used for
* entries, ressource allocation and bounds
* checking. */
size_total = screen_info.lfb_size;
if (size_total < size_vmode)
size_total = size_vmode;
/* size_remap -- the amount of video memory we are going to
* use for efifb. 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_total)
size_remap = size_total;
if (size_remap % PAGE_SIZE)
size_remap += PAGE_SIZE - (size_remap % PAGE_SIZE);
efifb_fix.smem_len = size_remap;
if (request_mem_region(efifb_fix.smem_start, size_remap, "efifb")) {
request_succeeded = 1;
} else {
/* We cannot make this fatal. Sometimes this comes from magic
spaces our resource handlers simply don't know about */
printk(KERN_WARNING
"efifb: cannot reserve video memory at 0x%lx\n",
efifb_fix.smem_start);
}
info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
if (!info) {
printk(KERN_ERR "efifb: cannot allocate framebuffer\n");
err = -ENOMEM;
goto err_release_mem;
}
info->pseudo_palette = info->par;
info->par = NULL;
info->apertures = alloc_apertures(1);
if (!info->apertures) {
err = -ENOMEM;
goto err_release_fb;
}
info->apertures->ranges[0].base = efifb_fix.smem_start;
info->apertures->ranges[0].size = size_remap;
info->screen_base = ioremap(efifb_fix.smem_start, efifb_fix.smem_len);
if (!info->screen_base) {
printk(KERN_ERR "efifb: abort, cannot ioremap video memory "
"0x%x @ 0x%lx\n",
efifb_fix.smem_len, efifb_fix.smem_start);
err = -EIO;
goto err_release_fb;
}
printk(KERN_INFO "efifb: framebuffer at 0x%lx, mapped to 0x%p, "
"using %dk, total %dk\n",
efifb_fix.smem_start, info->screen_base,
size_remap/1024, size_total/1024);
printk(KERN_INFO "efifb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
efifb_defined.xres, efifb_defined.yres,
efifb_defined.bits_per_pixel, efifb_fix.line_length,
screen_info.pages);
efifb_defined.xres_virtual = efifb_defined.xres;
efifb_defined.yres_virtual = efifb_fix.smem_len /
efifb_fix.line_length;
printk(KERN_INFO "efifb: scrolling: redraw\n");
efifb_defined.yres_virtual = efifb_defined.yres;
/* some dummy values for timing to make fbset happy */
efifb_defined.pixclock = 10000000 / efifb_defined.xres *
1000 / efifb_defined.yres;
efifb_defined.left_margin = (efifb_defined.xres / 8) & 0xf8;
efifb_defined.hsync_len = (efifb_defined.xres / 8) & 0xf8;
efifb_defined.red.offset = screen_info.red_pos;
efifb_defined.red.length = screen_info.red_size;
efifb_defined.green.offset = screen_info.green_pos;
efifb_defined.green.length = screen_info.green_size;
efifb_defined.blue.offset = screen_info.blue_pos;
efifb_defined.blue.length = screen_info.blue_size;
efifb_defined.transp.offset = screen_info.rsvd_pos;
efifb_defined.transp.length = screen_info.rsvd_size;
printk(KERN_INFO "efifb: %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);
efifb_fix.ypanstep = 0;
efifb_fix.ywrapstep = 0;
info->fbops = &efifb_ops;
info->var = efifb_defined;
info->fix = efifb_fix;
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE;
if ((err = fb_alloc_cmap(&info->cmap, 256, 0)) < 0) {
printk(KERN_ERR "efifb: cannot allocate colormap\n");
goto err_unmap;
}
if ((err = register_framebuffer(info)) < 0) {
printk(KERN_ERR "efifb: cannot register framebuffer\n");
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);
err_release_fb:
framebuffer_release(info);
err_release_mem:
if (request_succeeded)
release_mem_region(efifb_fix.smem_start, size_total);
return err;
}
static struct platform_driver efifb_driver = {
.probe = efifb_probe,
.driver = {
.name = "efifb",
},
};
static struct platform_device efifb_device = {
.name = "efifb",
};
static int __init efifb_init(void)
{
int ret;
char *option = NULL;
dmi_check_system(dmi_system_table);
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
return -ENODEV;
if (fb_get_options("efifb", &option))
return -ENODEV;
efifb_setup(option);
/* We don't get linelength from UGA Draw Protocol, only from
* EFI Graphics Protocol. So if it's not in DMI, and it's not
* passed in from the user, we really can't use the framebuffer.
*/
if (!screen_info.lfb_linelength)
return -ENODEV;
ret = platform_driver_register(&efifb_driver);
if (!ret) {
ret = platform_device_register(&efifb_device);
if (ret)
platform_driver_unregister(&efifb_driver);
}
return ret;
}
module_init(efifb_init);
MODULE_LICENSE("GPL");
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