498 lines
14 KiB
C
498 lines
14 KiB
C
/*
|
|
* framebuffer driver for VBE 2.0 compliant graphic boards
|
|
*
|
|
* switching to graphics mode happens at boot time (while
|
|
* running in real mode, see arch/i386/boot/video.S).
|
|
*
|
|
* (c) 1998 Gerd Knorr <kraxel@goldbach.in-berlin.de>
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/string.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/fb.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/init.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/screen_info.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <video/vga.h>
|
|
|
|
#define dac_reg (0x3c8)
|
|
#define dac_val (0x3c9)
|
|
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
struct vesafb_par {
|
|
u32 pseudo_palette[256];
|
|
int wc_cookie;
|
|
};
|
|
|
|
static struct fb_var_screeninfo vesafb_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 vesafb_fix = {
|
|
.id = "VESA VGA",
|
|
.type = FB_TYPE_PACKED_PIXELS,
|
|
.accel = FB_ACCEL_NONE,
|
|
};
|
|
|
|
static int inverse __read_mostly;
|
|
static int mtrr __read_mostly; /* disable mtrr */
|
|
static int vram_remap; /* Set amount of memory to be used */
|
|
static int vram_total; /* Set total amount of memory */
|
|
static int pmi_setpal __read_mostly = 1; /* pmi for palette changes ??? */
|
|
static int ypan __read_mostly; /* 0..nothing, 1..ypan, 2..ywrap */
|
|
static void (*pmi_start)(void) __read_mostly;
|
|
static void (*pmi_pal) (void) __read_mostly;
|
|
static int depth __read_mostly;
|
|
static int vga_compat __read_mostly;
|
|
/* --------------------------------------------------------------------- */
|
|
|
|
static int vesafb_pan_display(struct fb_var_screeninfo *var,
|
|
struct fb_info *info)
|
|
{
|
|
#ifdef __i386__
|
|
int offset;
|
|
|
|
offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
|
|
|
|
__asm__ __volatile__(
|
|
"call *(%%edi)"
|
|
: /* no return value */
|
|
: "a" (0x4f07), /* EAX */
|
|
"b" (0), /* EBX */
|
|
"c" (offset), /* ECX */
|
|
"d" (offset >> 16), /* EDX */
|
|
"D" (&pmi_start)); /* EDI */
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
static int vesa_setpalette(int regno, unsigned red, unsigned green,
|
|
unsigned blue)
|
|
{
|
|
int shift = 16 - depth;
|
|
int err = -EINVAL;
|
|
|
|
/*
|
|
* Try VGA registers first...
|
|
*/
|
|
if (vga_compat) {
|
|
outb_p(regno, dac_reg);
|
|
outb_p(red >> shift, dac_val);
|
|
outb_p(green >> shift, dac_val);
|
|
outb_p(blue >> shift, dac_val);
|
|
err = 0;
|
|
}
|
|
|
|
#ifdef __i386__
|
|
/*
|
|
* Fallback to the PMI....
|
|
*/
|
|
if (err && pmi_setpal) {
|
|
struct { u_char blue, green, red, pad; } entry;
|
|
|
|
entry.red = red >> shift;
|
|
entry.green = green >> shift;
|
|
entry.blue = blue >> shift;
|
|
entry.pad = 0;
|
|
__asm__ __volatile__(
|
|
"call *(%%esi)"
|
|
: /* no return value */
|
|
: "a" (0x4f09), /* EAX */
|
|
"b" (0), /* EBX */
|
|
"c" (1), /* ECX */
|
|
"d" (regno), /* EDX */
|
|
"D" (&entry), /* EDI */
|
|
"S" (&pmi_pal)); /* ESI */
|
|
err = 0;
|
|
}
|
|
#endif
|
|
|
|
return err;
|
|
}
|
|
|
|
static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
|
|
unsigned blue, unsigned transp,
|
|
struct fb_info *info)
|
|
{
|
|
int err = 0;
|
|
|
|
/*
|
|
* 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 (info->var.bits_per_pixel == 8)
|
|
err = vesa_setpalette(regno,red,green,blue);
|
|
else if (regno < 16) {
|
|
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 err;
|
|
}
|
|
|
|
static void vesafb_destroy(struct fb_info *info)
|
|
{
|
|
struct vesafb_par *par = info->par;
|
|
|
|
fb_dealloc_cmap(&info->cmap);
|
|
arch_phys_wc_del(par->wc_cookie);
|
|
if (info->screen_base)
|
|
iounmap(info->screen_base);
|
|
release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
|
|
}
|
|
|
|
static struct fb_ops vesafb_ops = {
|
|
.owner = THIS_MODULE,
|
|
.fb_destroy = vesafb_destroy,
|
|
.fb_setcolreg = vesafb_setcolreg,
|
|
.fb_pan_display = vesafb_pan_display,
|
|
.fb_fillrect = cfb_fillrect,
|
|
.fb_copyarea = cfb_copyarea,
|
|
.fb_imageblit = cfb_imageblit,
|
|
};
|
|
|
|
static int vesafb_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, "redraw"))
|
|
ypan=0;
|
|
else if (! strcmp(this_opt, "ypan"))
|
|
ypan=1;
|
|
else if (! strcmp(this_opt, "ywrap"))
|
|
ypan=2;
|
|
else if (! strcmp(this_opt, "vgapal"))
|
|
pmi_setpal=0;
|
|
else if (! strcmp(this_opt, "pmipal"))
|
|
pmi_setpal=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);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int vesafb_probe(struct platform_device *dev)
|
|
{
|
|
struct fb_info *info;
|
|
struct vesafb_par *par;
|
|
int i, err;
|
|
unsigned int size_vmode;
|
|
unsigned int size_remap;
|
|
unsigned int size_total;
|
|
char *option = NULL;
|
|
|
|
/* ignore error return of fb_get_options */
|
|
fb_get_options("vesafb", &option);
|
|
vesafb_setup(option);
|
|
|
|
if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB)
|
|
return -ENODEV;
|
|
|
|
vga_compat = (screen_info.capabilities & 2) ? 0 : 1;
|
|
vesafb_fix.smem_start = screen_info.lfb_base;
|
|
vesafb_defined.bits_per_pixel = screen_info.lfb_depth;
|
|
if (15 == vesafb_defined.bits_per_pixel)
|
|
vesafb_defined.bits_per_pixel = 16;
|
|
vesafb_defined.xres = screen_info.lfb_width;
|
|
vesafb_defined.yres = screen_info.lfb_height;
|
|
vesafb_fix.line_length = screen_info.lfb_linelength;
|
|
vesafb_fix.visual = (vesafb_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 = vesafb_defined.yres * vesafb_fix.line_length;
|
|
|
|
/* size_total -- all video memory we have. Used for mtrr
|
|
* entries, resource 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 vesafb. 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;
|
|
vesafb_fix.smem_len = size_remap;
|
|
|
|
#ifndef __i386__
|
|
screen_info.vesapm_seg = 0;
|
|
#endif
|
|
|
|
if (!request_mem_region(vesafb_fix.smem_start, size_total, "vesafb")) {
|
|
printk(KERN_WARNING
|
|
"vesafb: cannot reserve video memory at 0x%lx\n",
|
|
vesafb_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(struct vesafb_par), &dev->dev);
|
|
if (!info) {
|
|
release_mem_region(vesafb_fix.smem_start, size_total);
|
|
return -ENOMEM;
|
|
}
|
|
platform_set_drvdata(dev, info);
|
|
par = info->par;
|
|
info->pseudo_palette = par->pseudo_palette;
|
|
|
|
/* set vesafb aperture size for generic probing */
|
|
info->apertures = alloc_apertures(1);
|
|
if (!info->apertures) {
|
|
err = -ENOMEM;
|
|
goto err;
|
|
}
|
|
info->apertures->ranges[0].base = screen_info.lfb_base;
|
|
info->apertures->ranges[0].size = size_total;
|
|
|
|
printk(KERN_INFO "vesafb: mode is %dx%dx%d, linelength=%d, pages=%d\n",
|
|
vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel, vesafb_fix.line_length, screen_info.pages);
|
|
|
|
if (screen_info.vesapm_seg) {
|
|
printk(KERN_INFO "vesafb: protected mode interface info at %04x:%04x\n",
|
|
screen_info.vesapm_seg,screen_info.vesapm_off);
|
|
}
|
|
|
|
if (screen_info.vesapm_seg < 0xc000)
|
|
ypan = pmi_setpal = 0; /* not available or some DOS TSR ... */
|
|
|
|
if (ypan || pmi_setpal) {
|
|
unsigned short *pmi_base;
|
|
pmi_base = (unsigned short*)phys_to_virt(((unsigned long)screen_info.vesapm_seg << 4) + screen_info.vesapm_off);
|
|
pmi_start = (void*)((char*)pmi_base + pmi_base[1]);
|
|
pmi_pal = (void*)((char*)pmi_base + pmi_base[2]);
|
|
printk(KERN_INFO "vesafb: pmi: set display start = %p, set palette = %p\n",pmi_start,pmi_pal);
|
|
if (pmi_base[3]) {
|
|
printk(KERN_INFO "vesafb: pmi: ports = ");
|
|
for (i = pmi_base[3]/2; pmi_base[i] != 0xffff; i++)
|
|
printk("%x ",pmi_base[i]);
|
|
printk("\n");
|
|
if (pmi_base[i] != 0xffff) {
|
|
/*
|
|
* memory areas not supported (yet?)
|
|
*
|
|
* Rules are: we have to set up a descriptor for the requested
|
|
* memory area and pass it in the ES register to the BIOS function.
|
|
*/
|
|
printk(KERN_INFO "vesafb: can't handle memory requests, pmi disabled\n");
|
|
ypan = pmi_setpal = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (vesafb_defined.bits_per_pixel == 8 && !pmi_setpal && !vga_compat) {
|
|
printk(KERN_WARNING "vesafb: hardware palette is unchangeable,\n"
|
|
" colors may be incorrect\n");
|
|
vesafb_fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
|
|
}
|
|
|
|
vesafb_defined.xres_virtual = vesafb_defined.xres;
|
|
vesafb_defined.yres_virtual = vesafb_fix.smem_len / vesafb_fix.line_length;
|
|
if (ypan && vesafb_defined.yres_virtual > vesafb_defined.yres) {
|
|
printk(KERN_INFO "vesafb: scrolling: %s using protected mode interface, yres_virtual=%d\n",
|
|
(ypan > 1) ? "ywrap" : "ypan",vesafb_defined.yres_virtual);
|
|
} else {
|
|
printk(KERN_INFO "vesafb: scrolling: redraw\n");
|
|
vesafb_defined.yres_virtual = vesafb_defined.yres;
|
|
ypan = 0;
|
|
}
|
|
|
|
/* some dummy values for timing to make fbset happy */
|
|
vesafb_defined.pixclock = 10000000 / vesafb_defined.xres * 1000 / vesafb_defined.yres;
|
|
vesafb_defined.left_margin = (vesafb_defined.xres / 8) & 0xf8;
|
|
vesafb_defined.hsync_len = (vesafb_defined.xres / 8) & 0xf8;
|
|
|
|
vesafb_defined.red.offset = screen_info.red_pos;
|
|
vesafb_defined.red.length = screen_info.red_size;
|
|
vesafb_defined.green.offset = screen_info.green_pos;
|
|
vesafb_defined.green.length = screen_info.green_size;
|
|
vesafb_defined.blue.offset = screen_info.blue_pos;
|
|
vesafb_defined.blue.length = screen_info.blue_size;
|
|
vesafb_defined.transp.offset = screen_info.rsvd_pos;
|
|
vesafb_defined.transp.length = screen_info.rsvd_size;
|
|
|
|
if (vesafb_defined.bits_per_pixel <= 8) {
|
|
depth = vesafb_defined.green.length;
|
|
vesafb_defined.red.length =
|
|
vesafb_defined.green.length =
|
|
vesafb_defined.blue.length =
|
|
vesafb_defined.bits_per_pixel;
|
|
}
|
|
|
|
printk(KERN_INFO "vesafb: %s: "
|
|
"size=%d:%d:%d:%d, shift=%d:%d:%d:%d\n",
|
|
(vesafb_defined.bits_per_pixel > 8) ?
|
|
"Truecolor" : (vga_compat || pmi_setpal) ?
|
|
"Pseudocolor" : "Static 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);
|
|
|
|
vesafb_fix.ypanstep = ypan ? 1 : 0;
|
|
vesafb_fix.ywrapstep = (ypan>1) ? 1 : 0;
|
|
|
|
/* request failure does not faze us, as vgacon probably has this
|
|
* region already (FIXME) */
|
|
request_region(0x3c0, 32, "vesafb");
|
|
|
|
if (mtrr == 3) {
|
|
unsigned int temp_size = size_total;
|
|
|
|
/* Find the largest power-of-two */
|
|
temp_size = roundup_pow_of_two(temp_size);
|
|
|
|
/* Try and find a power of two to add */
|
|
do {
|
|
par->wc_cookie =
|
|
arch_phys_wc_add(vesafb_fix.smem_start,
|
|
temp_size);
|
|
temp_size >>= 1;
|
|
} while (temp_size >= PAGE_SIZE && par->wc_cookie < 0);
|
|
|
|
info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len);
|
|
} else {
|
|
if (mtrr && mtrr != 3)
|
|
WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n");
|
|
info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
|
|
}
|
|
|
|
if (!info->screen_base) {
|
|
printk(KERN_ERR
|
|
"vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
|
|
vesafb_fix.smem_len, vesafb_fix.smem_start);
|
|
err = -EIO;
|
|
goto err;
|
|
}
|
|
|
|
printk(KERN_INFO "vesafb: framebuffer at 0x%lx, mapped to 0x%p, "
|
|
"using %dk, total %dk\n",
|
|
vesafb_fix.smem_start, info->screen_base,
|
|
size_remap/1024, size_total/1024);
|
|
|
|
info->fbops = &vesafb_ops;
|
|
info->var = vesafb_defined;
|
|
info->fix = vesafb_fix;
|
|
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE |
|
|
(ypan ? FBINFO_HWACCEL_YPAN : 0);
|
|
|
|
if (!ypan)
|
|
info->fbops->fb_pan_display = NULL;
|
|
|
|
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;
|
|
}
|
|
fb_info(info, "%s frame buffer device\n", info->fix.id);
|
|
return 0;
|
|
err:
|
|
arch_phys_wc_del(par->wc_cookie);
|
|
if (info->screen_base)
|
|
iounmap(info->screen_base);
|
|
framebuffer_release(info);
|
|
release_mem_region(vesafb_fix.smem_start, size_total);
|
|
return err;
|
|
}
|
|
|
|
static int vesafb_remove(struct platform_device *pdev)
|
|
{
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
|
|
|
unregister_framebuffer(info);
|
|
framebuffer_release(info);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver vesafb_driver = {
|
|
.driver = {
|
|
.name = "vesa-framebuffer",
|
|
},
|
|
.probe = vesafb_probe,
|
|
.remove = vesafb_remove,
|
|
};
|
|
|
|
module_platform_driver(vesafb_driver);
|
|
MODULE_LICENSE("GPL");
|