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linux/drivers/video/platinumfb.c
Stephen Rothwell cec0dd94cf platinumfb: Use linux/of_{device,platform}.h instead of asm 
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-06-09 13:46:38 +10:00

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/*
* platinumfb.c -- frame buffer device for the PowerMac 'platinum' display
*
* Copyright (C) 1998 Franz Sirl
*
* Frame buffer structure from:
* drivers/video/controlfb.c -- frame buffer device for
* Apple 'control' display chip.
* Copyright (C) 1998 Dan Jacobowitz
*
* Hardware information from:
* platinum.c: Console support for PowerMac "platinum" display adaptor.
* Copyright (C) 1996 Paul Mackerras and Mark Abene
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/nvram.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/pgtable.h>
#include "macmodes.h"
#include "platinumfb.h"
static int default_vmode = VMODE_NVRAM;
static int default_cmode = CMODE_NVRAM;
struct fb_info_platinum {
struct fb_info *info;
int vmode, cmode;
int xres, yres;
int vxres, vyres;
int xoffset, yoffset;
struct {
__u8 red, green, blue;
} palette[256];
u32 pseudo_palette[16];
volatile struct cmap_regs __iomem *cmap_regs;
unsigned long cmap_regs_phys;
volatile struct platinum_regs __iomem *platinum_regs;
unsigned long platinum_regs_phys;
__u8 __iomem *frame_buffer;
volatile __u8 __iomem *base_frame_buffer;
unsigned long frame_buffer_phys;
unsigned long total_vram;
int clktype;
int dactype;
struct resource rsrc_fb, rsrc_reg;
};
/*
* Frame buffer device API
*/
static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static int platinumfb_blank(int blank_mode, struct fb_info *info);
static int platinumfb_set_par (struct fb_info *info);
static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info);
/*
* internal functions
*/
static inline int platinum_vram_reqd(int video_mode, int color_mode);
static int read_platinum_sense(struct fb_info_platinum *pinfo);
static void set_platinum_clock(struct fb_info_platinum *pinfo);
static void platinum_set_hardware(struct fb_info_platinum *pinfo);
static int platinum_var_to_par(struct fb_var_screeninfo *var,
struct fb_info_platinum *pinfo,
int check_only);
/*
* Interface used by the world
*/
static struct fb_ops platinumfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = platinumfb_check_var,
.fb_set_par = platinumfb_set_par,
.fb_setcolreg = platinumfb_setcolreg,
.fb_blank = platinumfb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
/*
* Checks a var structure
*/
static int platinumfb_check_var (struct fb_var_screeninfo *var, struct fb_info *info)
{
return platinum_var_to_par(var, info->par, 1);
}
/*
* Applies current var to display
*/
static int platinumfb_set_par (struct fb_info *info)
{
struct fb_info_platinum *pinfo = info->par;
struct platinum_regvals *init;
int err, offset = 0x20;
if((err = platinum_var_to_par(&info->var, pinfo, 0))) {
printk (KERN_ERR "platinumfb_set_par: error calling"
" platinum_var_to_par: %d.\n", err);
return err;
}
platinum_set_hardware(pinfo);
init = platinum_reg_init[pinfo->vmode-1];
if ((pinfo->vmode == VMODE_832_624_75) && (pinfo->cmode > CMODE_8))
offset = 0x10;
info->screen_base = pinfo->frame_buffer + init->fb_offset + offset;
info->fix.smem_start = (pinfo->frame_buffer_phys) + init->fb_offset + offset;
info->fix.visual = (pinfo->cmode == CMODE_8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_DIRECTCOLOR;
info->fix.line_length = vmode_attrs[pinfo->vmode-1].hres * (1<<pinfo->cmode)
+ offset;
printk("line_length: %x\n", info->fix.line_length);
return 0;
}
static int platinumfb_blank(int blank, struct fb_info *fb)
{
/*
* Blank the screen if blank_mode != 0, else unblank. If blank == NULL
* then the caller blanks by setting the CLUT (Color Look Up Table) to all
* black. Return 0 if blanking succeeded, != 0 if un-/blanking failed due
* to e.g. a video mode which doesn't support it. Implements VESA suspend
* and powerdown modes on hardware that supports disabling hsync/vsync:
* blank_mode == 2: suspend vsync
* blank_mode == 3: suspend hsync
* blank_mode == 4: powerdown
*/
/* [danj] I think there's something fishy about those constants... */
/*
struct fb_info_platinum *info = (struct fb_info_platinum *) fb;
int ctrl;
ctrl = ld_le32(&info->platinum_regs->ctrl.r) | 0x33;
if (blank)
--blank_mode;
if (blank & VESA_VSYNC_SUSPEND)
ctrl &= ~3;
if (blank & VESA_HSYNC_SUSPEND)
ctrl &= ~0x30;
out_le32(&info->platinum_regs->ctrl.r, ctrl);
*/
/* TODO: Figure out how the heck to powerdown this thing! */
return 0;
}
static int platinumfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
struct fb_info_platinum *pinfo = info->par;
volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
if (regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
pinfo->palette[regno].red = red;
pinfo->palette[regno].green = green;
pinfo->palette[regno].blue = blue;
out_8(&cmap_regs->addr, regno); /* tell clut what addr to fill */
out_8(&cmap_regs->lut, red); /* send one color channel at */
out_8(&cmap_regs->lut, green); /* a time... */
out_8(&cmap_regs->lut, blue);
if (regno < 16) {
int i;
u32 *pal = info->pseudo_palette;
switch (pinfo->cmode) {
case CMODE_16:
pal[regno] = (regno << 10) | (regno << 5) | regno;
break;
case CMODE_32:
i = (regno << 8) | regno;
pal[regno] = (i << 16) | i;
break;
}
}
return 0;
}
static inline int platinum_vram_reqd(int video_mode, int color_mode)
{
return vmode_attrs[video_mode-1].vres *
(vmode_attrs[video_mode-1].hres * (1<<color_mode) +
((video_mode == VMODE_832_624_75) &&
(color_mode > CMODE_8)) ? 0x10 : 0x20) + 0x1000;
}
#define STORE_D2(a, d) { \
out_8(&cmap_regs->addr, (a+32)); \
out_8(&cmap_regs->d2, (d)); \
}
static void set_platinum_clock(struct fb_info_platinum *pinfo)
{
volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
struct platinum_regvals *init;
init = platinum_reg_init[pinfo->vmode-1];
STORE_D2(6, 0xc6);
out_8(&cmap_regs->addr,3+32);
if (in_8(&cmap_regs->d2) == 2) {
STORE_D2(7, init->clock_params[pinfo->clktype][0]);
STORE_D2(8, init->clock_params[pinfo->clktype][1]);
STORE_D2(3, 3);
} else {
STORE_D2(4, init->clock_params[pinfo->clktype][0]);
STORE_D2(5, init->clock_params[pinfo->clktype][1]);
STORE_D2(3, 2);
}
__delay(5000);
STORE_D2(9, 0xa6);
}
/* Now how about actually saying, Make it so! */
/* Some things in here probably don't need to be done each time. */
static void platinum_set_hardware(struct fb_info_platinum *pinfo)
{
volatile struct platinum_regs __iomem *platinum_regs = pinfo->platinum_regs;
volatile struct cmap_regs __iomem *cmap_regs = pinfo->cmap_regs;
struct platinum_regvals *init;
int i;
int vmode, cmode;
vmode = pinfo->vmode;
cmode = pinfo->cmode;
init = platinum_reg_init[vmode - 1];
/* Initialize display timing registers */
out_be32(&platinum_regs->reg[24].r, 7); /* turn display off */
for (i = 0; i < 26; ++i)
out_be32(&platinum_regs->reg[i+32].r, init->regs[i]);
out_be32(&platinum_regs->reg[26+32].r, (pinfo->total_vram == 0x100000 ?
init->offset[cmode] + 4 - cmode :
init->offset[cmode]));
out_be32(&platinum_regs->reg[16].r, (unsigned) pinfo->frame_buffer_phys+init->fb_offset+0x10);
out_be32(&platinum_regs->reg[18].r, init->pitch[cmode]);
out_be32(&platinum_regs->reg[19].r, (pinfo->total_vram == 0x100000 ?
init->mode[cmode+1] :
init->mode[cmode]));
out_be32(&platinum_regs->reg[20].r, (pinfo->total_vram == 0x100000 ? 0x11 : 0x1011));
out_be32(&platinum_regs->reg[21].r, 0x100);
out_be32(&platinum_regs->reg[22].r, 1);
out_be32(&platinum_regs->reg[23].r, 1);
out_be32(&platinum_regs->reg[26].r, 0xc00);
out_be32(&platinum_regs->reg[27].r, 0x235);
/* out_be32(&platinum_regs->reg[27].r, 0x2aa); */
STORE_D2(0, (pinfo->total_vram == 0x100000 ?
init->dacula_ctrl[cmode] & 0xf :
init->dacula_ctrl[cmode]));
STORE_D2(1, 4);
STORE_D2(2, 0);
set_platinum_clock(pinfo);
out_be32(&platinum_regs->reg[24].r, 0); /* turn display on */
}
/*
* Set misc info vars for this driver
*/
static void __devinit platinum_init_info(struct fb_info *info, struct fb_info_platinum *pinfo)
{
/* Fill fb_info */
info->fbops = &platinumfb_ops;
info->pseudo_palette = pinfo->pseudo_palette;
info->flags = FBINFO_DEFAULT;
info->screen_base = pinfo->frame_buffer + 0x20;
fb_alloc_cmap(&info->cmap, 256, 0);
/* Fill fix common fields */
strcpy(info->fix.id, "platinum");
info->fix.mmio_start = pinfo->platinum_regs_phys;
info->fix.mmio_len = 0x1000;
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.smem_start = pinfo->frame_buffer_phys + 0x20; /* will be updated later */
info->fix.smem_len = pinfo->total_vram - 0x20;
info->fix.ywrapstep = 0;
info->fix.xpanstep = 0;
info->fix.ypanstep = 0;
info->fix.type_aux = 0;
info->fix.accel = FB_ACCEL_NONE;
}
static int __devinit platinum_init_fb(struct fb_info *info)
{
struct fb_info_platinum *pinfo = info->par;
struct fb_var_screeninfo var;
int sense, rc;
sense = read_platinum_sense(pinfo);
printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
if (default_vmode == VMODE_NVRAM) {
#ifdef CONFIG_NVRAM
default_vmode = nvram_read_byte(NV_VMODE);
if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
!platinum_reg_init[default_vmode-1])
#endif
default_vmode = VMODE_CHOOSE;
}
if (default_vmode == VMODE_CHOOSE) {
default_vmode = mac_map_monitor_sense(sense);
}
if (default_vmode <= 0 || default_vmode > VMODE_MAX)
default_vmode = VMODE_640_480_60;
#ifdef CONFIG_NVRAM
if (default_cmode == CMODE_NVRAM)
default_cmode = nvram_read_byte(NV_CMODE);
#endif
if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
default_cmode = CMODE_8;
/*
* Reduce the pixel size if we don't have enough VRAM.
*/
while(default_cmode > CMODE_8 &&
platinum_vram_reqd(default_vmode, default_cmode) > pinfo->total_vram)
default_cmode--;
printk("platinumfb: Using video mode %d and color mode %d.\n", default_vmode, default_cmode);
/* Setup default var */
if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
/* This shouldn't happen! */
printk("mac_vmode_to_var(%d, %d,) failed\n", default_vmode, default_cmode);
try_again:
default_vmode = VMODE_640_480_60;
default_cmode = CMODE_8;
if (mac_vmode_to_var(default_vmode, default_cmode, &var) < 0) {
printk(KERN_ERR "platinumfb: mac_vmode_to_var() failed\n");
return -ENXIO;
}
}
/* Initialize info structure */
platinum_init_info(info, pinfo);
/* Apply default var */
info->var = var;
var.activate = FB_ACTIVATE_NOW;
rc = fb_set_var(info, &var);
if (rc && (default_vmode != VMODE_640_480_60 || default_cmode != CMODE_8))
goto try_again;
/* Register with fbdev layer */
rc = register_framebuffer(info);
if (rc < 0)
return rc;
printk(KERN_INFO "fb%d: Apple Platinum frame buffer device\n", info->node);
return 0;
}
/*
* Get the monitor sense value.
* Note that this can be called before calibrate_delay,
* so we can't use udelay.
*/
static int read_platinum_sense(struct fb_info_platinum *info)
{
volatile struct platinum_regs __iomem *platinum_regs = info->platinum_regs;
int sense;
out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
__delay(2000);
sense = (~in_be32(&platinum_regs->reg[23].r) & 7) << 8;
/* drive each sense line low in turn and collect the other 2 */
out_be32(&platinum_regs->reg[23].r, 3); /* drive A low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 3) << 4;
out_be32(&platinum_regs->reg[23].r, 5); /* drive B low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 4) << 1;
sense |= (~in_be32(&platinum_regs->reg[23].r) & 1) << 2;
out_be32(&platinum_regs->reg[23].r, 6); /* drive C low */
__delay(2000);
sense |= (~in_be32(&platinum_regs->reg[23].r) & 6) >> 1;
out_be32(&platinum_regs->reg[23].r, 7); /* turn off drivers */
return sense;
}
/*
* This routine takes a user-supplied var, and picks the best vmode/cmode from it.
* It also updates the var structure to the actual mode data obtained
*/
static int platinum_var_to_par(struct fb_var_screeninfo *var,
struct fb_info_platinum *pinfo,
int check_only)
{
int vmode, cmode;
if (mac_var_to_vmode(var, &vmode, &cmode) != 0) {
printk(KERN_ERR "platinum_var_to_par: mac_var_to_vmode unsuccessful.\n");
printk(KERN_ERR "platinum_var_to_par: var->xres = %d\n", var->xres);
printk(KERN_ERR "platinum_var_to_par: var->yres = %d\n", var->yres);
printk(KERN_ERR "platinum_var_to_par: var->xres_virtual = %d\n", var->xres_virtual);
printk(KERN_ERR "platinum_var_to_par: var->yres_virtual = %d\n", var->yres_virtual);
printk(KERN_ERR "platinum_var_to_par: var->bits_per_pixel = %d\n", var->bits_per_pixel);
printk(KERN_ERR "platinum_var_to_par: var->pixclock = %d\n", var->pixclock);
printk(KERN_ERR "platinum_var_to_par: var->vmode = %d\n", var->vmode);
return -EINVAL;
}
if (!platinum_reg_init[vmode-1]) {
printk(KERN_ERR "platinum_var_to_par, vmode %d not valid.\n", vmode);
return -EINVAL;
}
if (platinum_vram_reqd(vmode, cmode) > pinfo->total_vram) {
printk(KERN_ERR "platinum_var_to_par, not enough ram for vmode %d, cmode %d.\n", vmode, cmode);
return -EINVAL;
}
if (mac_vmode_to_var(vmode, cmode, var))
return -EINVAL;
if (check_only)
return 0;
pinfo->vmode = vmode;
pinfo->cmode = cmode;
pinfo->xres = vmode_attrs[vmode-1].hres;
pinfo->yres = vmode_attrs[vmode-1].vres;
pinfo->xoffset = 0;
pinfo->yoffset = 0;
pinfo->vxres = pinfo->xres;
pinfo->vyres = pinfo->yres;
return 0;
}
/*
* Parse user speficied options (`video=platinumfb:')
*/
static int __init platinumfb_setup(char *options)
{
char *this_opt;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "vmode:", 6)) {
int vmode = simple_strtoul(this_opt+6, NULL, 0);
if (vmode > 0 && vmode <= VMODE_MAX)
default_vmode = vmode;
} else if (!strncmp(this_opt, "cmode:", 6)) {
int depth = simple_strtoul(this_opt+6, NULL, 0);
switch (depth) {
case 0:
case 8:
default_cmode = CMODE_8;
break;
case 15:
case 16:
default_cmode = CMODE_16;
break;
case 24:
case 32:
default_cmode = CMODE_32;
break;
}
}
}
return 0;
}
#ifdef __powerpc__
#define invalidate_cache(addr) \
asm volatile("eieio; dcbf 0,%1" \
: "=m" (*(addr)) : "r" (addr) : "memory");
#else
#define invalidate_cache(addr)
#endif
static int __devinit platinumfb_probe(struct of_device* odev,
const struct of_device_id *match)
{
struct device_node *dp = odev->node;
struct fb_info *info;
struct fb_info_platinum *pinfo;
volatile __u8 *fbuffer;
int bank0, bank1, bank2, bank3, rc;
dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
if (info == NULL) {
dev_err(&odev->dev, "Failed to allocate fbdev !\n");
return -ENOMEM;
}
pinfo = info->par;
if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
of_address_to_resource(dp, 1, &pinfo->rsrc_fb)) {
dev_err(&odev->dev, "Can't get resources\n");
framebuffer_release(info);
return -ENXIO;
}
dev_dbg(&odev->dev, " registers : 0x%llx...0x%llx\n",
(unsigned long long)pinfo->rsrc_reg.start,
(unsigned long long)pinfo->rsrc_reg.end);
dev_dbg(&odev->dev, " framebuffer: 0x%llx...0x%llx\n",
(unsigned long long)pinfo->rsrc_fb.start,
(unsigned long long)pinfo->rsrc_fb.end);
/* Do not try to request register space, they overlap with the
* northbridge and that can fail. Only request framebuffer
*/
if (!request_mem_region(pinfo->rsrc_fb.start,
pinfo->rsrc_fb.end - pinfo->rsrc_fb.start + 1,
"platinumfb framebuffer")) {
printk(KERN_ERR "platinumfb: Can't request framebuffer !\n");
framebuffer_release(info);
return -ENXIO;
}
/* frame buffer - map only 4MB */
pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
_PAGE_WRITETHRU);
pinfo->base_frame_buffer = pinfo->frame_buffer;
/* registers */
pinfo->platinum_regs_phys = pinfo->rsrc_reg.start;
pinfo->platinum_regs = ioremap(pinfo->rsrc_reg.start, 0x1000);
pinfo->cmap_regs_phys = 0xf301b000; /* XXX not in prom? */
request_mem_region(pinfo->cmap_regs_phys, 0x1000, "platinumfb cmap");
pinfo->cmap_regs = ioremap(pinfo->cmap_regs_phys, 0x1000);
/* Grok total video ram */
out_be32(&pinfo->platinum_regs->reg[16].r, (unsigned)pinfo->frame_buffer_phys);
out_be32(&pinfo->platinum_regs->reg[20].r, 0x1011); /* select max vram */
out_be32(&pinfo->platinum_regs->reg[24].r, 0); /* switch in vram */
fbuffer = pinfo->base_frame_buffer;
fbuffer[0x100000] = 0x34;
fbuffer[0x100008] = 0x0;
invalidate_cache(&fbuffer[0x100000]);
fbuffer[0x200000] = 0x56;
fbuffer[0x200008] = 0x0;
invalidate_cache(&fbuffer[0x200000]);
fbuffer[0x300000] = 0x78;
fbuffer[0x300008] = 0x0;
invalidate_cache(&fbuffer[0x300000]);
bank0 = 1; /* builtin 1MB vram, always there */
bank1 = fbuffer[0x100000] == 0x34;
bank2 = fbuffer[0x200000] == 0x56;
bank3 = fbuffer[0x300000] == 0x78;
pinfo->total_vram = (bank0 + bank1 + bank2 + bank3) * 0x100000;
printk(KERN_INFO "platinumfb: Total VRAM = %dMB (%d%d%d%d)\n",
(unsigned int) (pinfo->total_vram / 1024 / 1024),
bank3, bank2, bank1, bank0);
/*
* Try to determine whether we have an old or a new DACula.
*/
out_8(&pinfo->cmap_regs->addr, 0x40);
pinfo->dactype = in_8(&pinfo->cmap_regs->d2);
switch (pinfo->dactype) {
case 0x3c:
pinfo->clktype = 1;
printk(KERN_INFO "platinumfb: DACula type 0x3c\n");
break;
case 0x84:
pinfo->clktype = 0;
printk(KERN_INFO "platinumfb: DACula type 0x84\n");
break;
default:
pinfo->clktype = 0;
printk(KERN_INFO "platinumfb: Unknown DACula type: %x\n", pinfo->dactype);
break;
}
dev_set_drvdata(&odev->dev, info);
rc = platinum_init_fb(info);
if (rc != 0) {
iounmap(pinfo->frame_buffer);
iounmap(pinfo->platinum_regs);
iounmap(pinfo->cmap_regs);
dev_set_drvdata(&odev->dev, NULL);
framebuffer_release(info);
}
return rc;
}
static int __devexit platinumfb_remove(struct of_device* odev)
{
struct fb_info *info = dev_get_drvdata(&odev->dev);
struct fb_info_platinum *pinfo = info->par;
unregister_framebuffer (info);
/* Unmap frame buffer and registers */
iounmap(pinfo->frame_buffer);
iounmap(pinfo->platinum_regs);
iounmap(pinfo->cmap_regs);
release_mem_region(pinfo->rsrc_fb.start,
pinfo->rsrc_fb.end -
pinfo->rsrc_fb.start + 1);
release_mem_region(pinfo->cmap_regs_phys, 0x1000);
framebuffer_release(info);
return 0;
}
static struct of_device_id platinumfb_match[] =
{
{
.name = "platinum",
},
{},
};
static struct of_platform_driver platinum_driver =
{
.name = "platinumfb",
.match_table = platinumfb_match,
.probe = platinumfb_probe,
.remove = platinumfb_remove,
};
static int __init platinumfb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("platinumfb", &option))
return -ENODEV;
platinumfb_setup(option);
#endif
of_register_platform_driver(&platinum_driver);
return 0;
}
static void __exit platinumfb_exit(void)
{
of_unregister_platform_driver(&platinum_driver);
}
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("framebuffer driver for Apple Platinum video");
module_init(platinumfb_init);
#ifdef MODULE
module_exit(platinumfb_exit);
#endif
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