mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
* Improvements to da8xx-fb to make it support v2 of the LCDC IP, used e.g. in BeagleBone * Himax HX8369 controller support * Various small fixes and cleanups -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJSKB9vAAoJEPo9qoy8lh71dqkP/AgEljWrEKumJ6KQYLjxGEQM RseTYKaNE78TkPX5p4DcA2rJ0Ud/yK/swelZvHfnq+6yTxUiuwsHDAPcgrMf27NM yWWTW0gJRrs7jbHF7sIQkPbww56Irjz7uzUfOoNRqajgf51+mB3olAhTUn9tE3Pf PW9u5M5b904VnT0VKASEUB9SUtx5izWKP9Yyy7QG8WF++zp4BHfmO7+8kx46cE0l WFAQL7JrvtzI2yVcnnkfDRpmHOunbupIGOAT79s3KlK226SHNRi3wd6w6zDTudjj sEMJLDpipKYliT+yzwgHmuHfDTi+gx6a36bTMf9lXp+KZKYEjNlWnYKKHdkdtk7Z nYlUagu+8tOUsZGy5dOyMkbeYMMfpcBlN1VjMDBIs1kPc0psg15wPznLdnPa5rau Ag0Z7GPHvy8ucFBsfqp1Sgsi1QMSqWgkcCh55BAMID58A7ELPhHz9NpaFt9KGMEy EKoNPQmTjIosgEQDdbayqjBwBqK1O0Q8MPPFGiDCwX37XppgZ4mflSz3NfDpwN+J +J+C3y2Bn2qzYPUzy3vOoohoWvtxsGnteNyX3D/Yrk7I4/4IWdI0maTVMv9yq//D /uBt+OxEY0ODkfC+yhhKT6P5zNBqsoWa16fqDdx3WDV7xoCsVq6dKkhaQd/zEr0Z Yjtcw3ZRyGLQgX75Zo+B =Kr2i -----END PGP SIGNATURE----- Merge tag 'fbdev-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux Pull fbdev changes from Tomi Valkeinen: - Improvements to da8xx-fb to make it support v2 of the LCDC IP, used eg in BeagleBone - Himax HX8369 controller support - Various small fixes and cleanups * tag 'fbdev-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (42 commits) video: da8xx-fb: fix the polarities of the hsync/vsync pulse video: da8xx-fb: support lcdc v2 timing register expansion video: da8xx-fb: fixing timing off by one errors video: da8xx-fb fixing incorrect porch mappings video: xilinxfb: replace devm_request_and_ioremap by devm_ioremap_resource fbmem: move EXPORT_SYMBOL annotation next to symbol declarations drivers: video: fbcmap: remove the redundency and incorrect checkings video: mxsfb: simplify use of devm_ioremap_resource Release efifb's colormap in efifb_destroy() at91/avr32/atmel_lcdfb: prepare clk before calling enable video: exynos: Ensure definitions match prototypes OMAPDSS: fix WARN_ON in 'alpha_blending_enabled' sysfs file OMAPDSS: HDMI: Fix possible NULL reference video: da8xx-fb: adding am33xx as dependency video: da8xx-fb: let compiler decide what to inline video: da8xx-fb: make clock naming consistent video: da8xx-fb: set upstream clock rate (if reqd) video: da8xx-fb: reorganize panel detection video: da8xx-fb: ensure non-null cfg in pdata video: da8xx-fb: use devres ...
350 lines
9.6 KiB
C
350 lines
9.6 KiB
C
/*
|
|
* 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>
|
|
#include <asm/sysfb.h>
|
|
|
|
static bool request_mem_succeeded = false;
|
|
|
|
static struct pci_dev *default_vga;
|
|
|
|
static struct fb_var_screeninfo efifb_defined = {
|
|
.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 = {
|
|
.id = "EFI VGA",
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.accel = FB_ACCEL_NONE,
|
|
.visual = FB_VISUAL_TRUECOLOR,
|
|
};
|
|
|
|
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);
|
|
if (request_mem_succeeded)
|
|
release_mem_region(info->apertures->ranges[0].base,
|
|
info->apertures->ranges[0].size);
|
|
fb_dealloc_cmap(&info->cmap);
|
|
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,
|
|
};
|
|
|
|
struct pci_dev *vga_default_device(void)
|
|
{
|
|
return default_vga;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(vga_default_device);
|
|
|
|
void vga_set_default_device(struct pci_dev *pdev)
|
|
{
|
|
default_vga = pdev;
|
|
}
|
|
|
|
static int efifb_setup(char *options)
|
|
{
|
|
char *this_opt;
|
|
int i;
|
|
struct pci_dev *dev = NULL;
|
|
|
|
if (options && *options) {
|
|
while ((this_opt = strsep(&options, ",")) != NULL) {
|
|
if (!*this_opt) continue;
|
|
|
|
for (i = 0; i < M_UNKNOWN; i++) {
|
|
if (!strcmp(this_opt, efifb_dmi_list[i].optname) &&
|
|
efifb_dmi_list[i].base != 0) {
|
|
screen_info.lfb_base = efifb_dmi_list[i].base;
|
|
screen_info.lfb_linelength = efifb_dmi_list[i].stride;
|
|
screen_info.lfb_width = efifb_dmi_list[i].width;
|
|
screen_info.lfb_height = efifb_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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
if (!(pci_resource_flags(dev, i) & IORESOURCE_MEM))
|
|
continue;
|
|
|
|
start = pci_resource_start(dev, i);
|
|
end = pci_resource_end(dev, i);
|
|
|
|
if (!start || !end)
|
|
continue;
|
|
|
|
if (screen_info.lfb_base >= start &&
|
|
(screen_info.lfb_base + screen_info.lfb_size) < end)
|
|
default_vga = dev;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int efifb_probe(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info;
|
|
int err;
|
|
unsigned int size_vmode;
|
|
unsigned int size_remap;
|
|
unsigned int size_total;
|
|
char *option = NULL;
|
|
|
|
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;
|
|
|
|
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_mem_succeeded = true;
|
|
} 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_wc(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_mem_succeeded)
|
|
release_mem_region(efifb_fix.smem_start, size_total);
|
|
return err;
|
|
}
|
|
|
|
static struct platform_driver efifb_driver = {
|
|
.driver = {
|
|
.name = "efi-framebuffer",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = efifb_probe,
|
|
};
|
|
|
|
module_platform_driver(efifb_driver);
|
|
MODULE_LICENSE("GPL");
|