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zircon-guest / third_party / linux / 990e47782e40868c425f19e26ef7f049f828a9e1 / . / drivers / video / fbdev / stifb.c
blob: 045e8afe398be35866adb64d774c0ebf0dd9834c [file] [log] [blame]
/*
* linux/drivers/video/stifb.c -
* Low level Frame buffer driver for HP workstations with
* STI (standard text interface) video firmware.
*
* Copyright (C) 2001-2006 Helge Deller <deller@gmx.de>
* Portions Copyright (C) 2001 Thomas Bogendoerfer <tsbogend@alpha.franken.de>
*
* Based on:
* - linux/drivers/video/artistfb.c -- Artist frame buffer driver
* Copyright (C) 2000 Philipp Rumpf <prumpf@tux.org>
* - based on skeletonfb, which was
* Created 28 Dec 1997 by Geert Uytterhoeven
* - HP Xhp cfb-based X11 window driver for XFree86
* (c)Copyright 1992 Hewlett-Packard Co.
*
*
* The following graphics display devices (NGLE family) are supported by this driver:
*
* HPA4070A known as "HCRX", a 1280x1024 color device with 8 planes
* HPA4071A known as "HCRX24", a 1280x1024 color device with 24 planes,
* optionally available with a hardware accelerator as HPA4071A_Z
* HPA1659A known as "CRX", a 1280x1024 color device with 8 planes
* HPA1439A known as "CRX24", a 1280x1024 color device with 24 planes,
* optionally available with a hardware accelerator.
* HPA1924A known as "GRX", a 1280x1024 grayscale device with 8 planes
* HPA2269A known as "Dual CRX", a 1280x1024 color device with 8 planes,
* implements support for two displays on a single graphics card.
* HP710C internal graphics support optionally available on the HP9000s710 SPU,
* supports 1280x1024 color displays with 8 planes.
* HP710G same as HP710C, 1280x1024 grayscale only
* HP710L same as HP710C, 1024x768 color only
* HP712 internal graphics support on HP9000s712 SPU, supports 640x480,
* 1024x768 or 1280x1024 color displays on 8 planes (Artist)
*
* 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.
*/
/* TODO:
* - 1bpp mode is completely untested
* - add support for h/w acceleration
* - add hardware cursor
* - automatically disable double buffering (e.g. on RDI precisionbook laptop)
*/
/* on supported graphic devices you may:
* #define FALLBACK_TO_1BPP to fall back to 1 bpp, or
* #undef FALLBACK_TO_1BPP to reject support for unsupported cards */
#undef FALLBACK_TO_1BPP
#undef DEBUG_STIFB_REGS /* debug sti register accesses */
#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/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <asm/grfioctl.h> /* for HP-UX compatibility */
#include <linux/uaccess.h>
#include "sticore.h"
/* REGION_BASE(fb_info, index) returns the virtual address for region <index> */
#define REGION_BASE(fb_info, index) \
F_EXTEND(fb_info->sti->glob_cfg->region_ptrs[index])
#define NGLEDEVDEPROM_CRT_REGION 1
#define NR_PALETTE 256
typedef struct {
__s32 video_config_reg;
__s32 misc_video_start;
__s32 horiz_timing_fmt;
__s32 serr_timing_fmt;
__s32 vert_timing_fmt;
__s32 horiz_state;
__s32 vert_state;
__s32 vtg_state_elements;
__s32 pipeline_delay;
__s32 misc_video_end;
} video_setup_t;
typedef struct {
__s16 sizeof_ngle_data;
__s16 x_size_visible; /* visible screen dim in pixels */
__s16 y_size_visible;
__s16 pad2[15];
__s16 cursor_pipeline_delay;
__s16 video_interleaves;
__s32 pad3[11];
} ngle_rom_t;
struct stifb_info {
struct fb_info info;
unsigned int id;
ngle_rom_t ngle_rom;
struct sti_struct *sti;
int deviceSpecificConfig;
u32 pseudo_palette[16];
};
static int __initdata stifb_bpp_pref[MAX_STI_ROMS];
/* ------------------- chipset specific functions -------------------------- */
/* offsets to graphic-chip internal registers */
#define REG_1 0x000118
#define REG_2 0x000480
#define REG_3 0x0004a0
#define REG_4 0x000600
#define REG_6 0x000800
#define REG_7 0x000804
#define REG_8 0x000820
#define REG_9 0x000a04
#define REG_10 0x018000
#define REG_11 0x018004
#define REG_12 0x01800c
#define REG_13 0x018018
#define REG_14 0x01801c
#define REG_15 0x200000
#define REG_15b0 0x200000
#define REG_16b1 0x200005
#define REG_16b3 0x200007
#define REG_21 0x200218
#define REG_22 0x0005a0
#define REG_23 0x0005c0
#define REG_24 0x000808
#define REG_25 0x000b00
#define REG_26 0x200118
#define REG_27 0x200308
#define REG_32 0x21003c
#define REG_33 0x210040
#define REG_34 0x200008
#define REG_35 0x018010
#define REG_38 0x210020
#define REG_39 0x210120
#define REG_40 0x210130
#define REG_42 0x210028
#define REG_43 0x21002c
#define REG_44 0x210030
#define REG_45 0x210034
#define READ_BYTE(fb,reg) gsc_readb((fb)->info.fix.mmio_start + (reg))
#define READ_WORD(fb,reg) gsc_readl((fb)->info.fix.mmio_start + (reg))
#ifndef DEBUG_STIFB_REGS
# define DEBUG_OFF()
# define DEBUG_ON()
# define WRITE_BYTE(value,fb,reg) gsc_writeb((value),(fb)->info.fix.mmio_start + (reg))
# define WRITE_WORD(value,fb,reg) gsc_writel((value),(fb)->info.fix.mmio_start + (reg))
#else
static int debug_on = 1;
# define DEBUG_OFF() debug_on=0
# define DEBUG_ON() debug_on=1
# define WRITE_BYTE(value,fb,reg) do { if (debug_on) \
printk(KERN_DEBUG "%30s: WRITE_BYTE(0x%06x) = 0x%02x (old=0x%02x)\n", \
__func__, reg, value, READ_BYTE(fb,reg)); \
gsc_writeb((value),(fb)->info.fix.mmio_start + (reg)); } while (0)
# define WRITE_WORD(value,fb,reg) do { if (debug_on) \
printk(KERN_DEBUG "%30s: WRITE_WORD(0x%06x) = 0x%08x (old=0x%08x)\n", \
__func__, reg, value, READ_WORD(fb,reg)); \
gsc_writel((value),(fb)->info.fix.mmio_start + (reg)); } while (0)
#endif /* DEBUG_STIFB_REGS */
#define ENABLE 1 /* for enabling/disabling screen */
#define DISABLE 0
#define NGLE_LOCK(fb_info) do { } while (0)
#define NGLE_UNLOCK(fb_info) do { } while (0)
static void
SETUP_HW(struct stifb_info *fb)
{
char stat;
do {
stat = READ_BYTE(fb, REG_15b0);
if (!stat)
stat = READ_BYTE(fb, REG_15b0);
} while (stat);
}
static void
SETUP_FB(struct stifb_info *fb)
{
unsigned int reg10_value = 0;
SETUP_HW(fb);
switch (fb->id)
{
case CRT_ID_VISUALIZE_EG:
case S9000_ID_ARTIST:
case S9000_ID_A1659A:
reg10_value = 0x13601000;
break;
case S9000_ID_A1439A:
if (fb->info.var.bits_per_pixel == 32)
reg10_value = 0xBBA0A000;
else
reg10_value = 0x13601000;
break;
case S9000_ID_HCRX:
if (fb->info.var.bits_per_pixel == 32)
reg10_value = 0xBBA0A000;
else
reg10_value = 0x13602000;
break;
case S9000_ID_TIMBER:
case CRX24_OVERLAY_PLANES:
reg10_value = 0x13602000;
break;
}
if (reg10_value)
WRITE_WORD(reg10_value, fb, REG_10);
WRITE_WORD(0x83000300, fb, REG_14);
SETUP_HW(fb);
WRITE_BYTE(1, fb, REG_16b1);
}
static void
START_IMAGE_COLORMAP_ACCESS(struct stifb_info *fb)
{
SETUP_HW(fb);
WRITE_WORD(0xBBE0F000, fb, REG_10);
WRITE_WORD(0x03000300, fb, REG_14);
WRITE_WORD(~0, fb, REG_13);
}
static void
WRITE_IMAGE_COLOR(struct stifb_info *fb, int index, int color)
{
SETUP_HW(fb);
WRITE_WORD(((0x100+index)<<2), fb, REG_3);
WRITE_WORD(color, fb, REG_4);
}
static void
FINISH_IMAGE_COLORMAP_ACCESS(struct stifb_info *fb)
{
WRITE_WORD(0x400, fb, REG_2);
if (fb->info.var.bits_per_pixel == 32) {
WRITE_WORD(0x83000100, fb, REG_1);
} else {
if (fb->id == S9000_ID_ARTIST || fb->id == CRT_ID_VISUALIZE_EG)
WRITE_WORD(0x80000100, fb, REG_26);
else
WRITE_WORD(0x80000100, fb, REG_1);
}
SETUP_FB(fb);
}
static void
SETUP_RAMDAC(struct stifb_info *fb)
{
SETUP_HW(fb);
WRITE_WORD(0x04000000, fb, 0x1020);
WRITE_WORD(0xff000000, fb, 0x1028);
}
static void
CRX24_SETUP_RAMDAC(struct stifb_info *fb)
{
SETUP_HW(fb);
WRITE_WORD(0x04000000, fb, 0x1000);
WRITE_WORD(0x02000000, fb, 0x1004);
WRITE_WORD(0xff000000, fb, 0x1008);
WRITE_WORD(0x05000000, fb, 0x1000);
WRITE_WORD(0x02000000, fb, 0x1004);
WRITE_WORD(0x03000000, fb, 0x1008);
}
#if 0
static void
HCRX_SETUP_RAMDAC(struct stifb_info *fb)
{
WRITE_WORD(0xffffffff, fb, REG_32);
}
#endif
static void
CRX24_SET_OVLY_MASK(struct stifb_info *fb)
{
SETUP_HW(fb);
WRITE_WORD(0x13a02000, fb, REG_11);
WRITE_WORD(0x03000300, fb, REG_14);
WRITE_WORD(0x000017f0, fb, REG_3);
WRITE_WORD(0xffffffff, fb, REG_13);
WRITE_WORD(0xffffffff, fb, REG_22);
WRITE_WORD(0x00000000, fb, REG_23);
}
static void
ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
{
unsigned int value = enable ? 0x43000000 : 0x03000000;
SETUP_HW(fb);
WRITE_WORD(0x06000000, fb, 0x1030);
WRITE_WORD(value, fb, 0x1038);
}
static void
CRX24_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
{
unsigned int value = enable ? 0x10000000 : 0x30000000;
SETUP_HW(fb);
WRITE_WORD(0x01000000, fb, 0x1000);
WRITE_WORD(0x02000000, fb, 0x1004);
WRITE_WORD(value, fb, 0x1008);
}
static void
ARTIST_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
{
u32 DregsMiscVideo = REG_21;
u32 DregsMiscCtl = REG_27;
SETUP_HW(fb);
if (enable) {
WRITE_WORD(READ_WORD(fb, DregsMiscVideo) | 0x0A000000, fb, DregsMiscVideo);
WRITE_WORD(READ_WORD(fb, DregsMiscCtl) | 0x00800000, fb, DregsMiscCtl);
} else {
WRITE_WORD(READ_WORD(fb, DregsMiscVideo) & ~0x0A000000, fb, DregsMiscVideo);
WRITE_WORD(READ_WORD(fb, DregsMiscCtl) & ~0x00800000, fb, DregsMiscCtl);
}
}
#define GET_ROMTABLE_INDEX(fb) \
(READ_BYTE(fb, REG_16b3) - 1)
#define HYPER_CONFIG_PLANES_24 0x00000100
#define IS_24_DEVICE(fb) \
(fb->deviceSpecificConfig & HYPER_CONFIG_PLANES_24)
#define IS_888_DEVICE(fb) \
(!(IS_24_DEVICE(fb)))
#define GET_FIFO_SLOTS(fb, cnt, numslots) \
{ while (cnt < numslots) \
cnt = READ_WORD(fb, REG_34); \
cnt -= numslots; \
}
#define IndexedDcd 0 /* Pixel data is indexed (pseudo) color */
#define Otc04 2 /* Pixels in each longword transfer (4) */
#define Otc32 5 /* Pixels in each longword transfer (32) */
#define Ots08 3 /* Each pixel is size (8)d transfer (1) */
#define OtsIndirect 6 /* Each bit goes through FG/BG color(8) */
#define AddrLong 5 /* FB address is Long aligned (pixel) */
#define BINovly 0x2 /* 8 bit overlay */
#define BINapp0I 0x0 /* Application Buffer 0, Indexed */
#define BINapp1I 0x1 /* Application Buffer 1, Indexed */
#define BINapp0F8 0xa /* Application Buffer 0, Fractional 8-8-8 */
#define BINattr 0xd /* Attribute Bitmap */
#define RopSrc 0x3
#define BitmapExtent08 3 /* Each write hits ( 8) bits in depth */
#define BitmapExtent32 5 /* Each write hits (32) bits in depth */
#define DataDynamic 0 /* Data register reloaded by direct access */
#define MaskDynamic 1 /* Mask register reloaded by direct access */
#define MaskOtc 0 /* Mask contains Object Count valid bits */
#define MaskAddrOffset(offset) (offset)
#define StaticReg(en) (en)
#define BGx(en) (en)
#define FGx(en) (en)
#define BAJustPoint(offset) (offset)
#define BAIndexBase(base) (base)
#define BA(F,C,S,A,J,B,I) \
(((F)<<31)|((C)<<27)|((S)<<24)|((A)<<21)|((J)<<16)|((B)<<12)|(I))
#define IBOvals(R,M,X,S,D,L,B,F) \
(((R)<<8)|((M)<<16)|((X)<<24)|((S)<<29)|((D)<<28)|((L)<<31)|((B)<<1)|(F))
#define NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb, val) \
WRITE_WORD(val, fb, REG_14)
#define NGLE_QUICK_SET_DST_BM_ACCESS(fb, val) \
WRITE_WORD(val, fb, REG_11)
#define NGLE_QUICK_SET_CTL_PLN_REG(fb, val) \
WRITE_WORD(val, fb, REG_12)
#define NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, plnmsk32) \
WRITE_WORD(plnmsk32, fb, REG_13)
#define NGLE_REALLY_SET_IMAGE_FG_COLOR(fb, fg32) \
WRITE_WORD(fg32, fb, REG_35)
#define NGLE_SET_TRANSFERDATA(fb, val) \
WRITE_WORD(val, fb, REG_8)
#define NGLE_SET_DSTXY(fb, val) \
WRITE_WORD(val, fb, REG_6)
#define NGLE_LONG_FB_ADDRESS(fbaddrbase, x, y) ( \
(u32) (fbaddrbase) + \
( (unsigned int) ( (y) << 13 ) | \
(unsigned int) ( (x) << 2 ) ) \
)
#define NGLE_BINC_SET_DSTADDR(fb, addr) \
WRITE_WORD(addr, fb, REG_3)
#define NGLE_BINC_SET_SRCADDR(fb, addr) \
WRITE_WORD(addr, fb, REG_2)
#define NGLE_BINC_SET_DSTMASK(fb, mask) \
WRITE_WORD(mask, fb, REG_22)
#define NGLE_BINC_WRITE32(fb, data32) \
WRITE_WORD(data32, fb, REG_23)
#define START_COLORMAPLOAD(fb, cmapBltCtlData32) \
WRITE_WORD((cmapBltCtlData32), fb, REG_38)
#define SET_LENXY_START_RECFILL(fb, lenxy) \
WRITE_WORD(lenxy, fb, REG_9)
#define SETUP_COPYAREA(fb) \
WRITE_BYTE(0, fb, REG_16b1)
static void
HYPER_ENABLE_DISABLE_DISPLAY(struct stifb_info *fb, int enable)
{
u32 DregsHypMiscVideo = REG_33;
unsigned int value;
SETUP_HW(fb);
value = READ_WORD(fb, DregsHypMiscVideo);
if (enable)
value |= 0x0A000000;
else
value &= ~0x0A000000;
WRITE_WORD(value, fb, DregsHypMiscVideo);
}
/* BufferNumbers used by SETUP_ATTR_ACCESS() */
#define BUFF0_CMAP0 0x00001e02
#define BUFF1_CMAP0 0x02001e02
#define BUFF1_CMAP3 0x0c001e02
#define ARTIST_CMAP0 0x00000102
#define HYPER_CMAP8 0x00000100
#define HYPER_CMAP24 0x00000800
static void
SETUP_ATTR_ACCESS(struct stifb_info *fb, unsigned BufferNumber)
{
SETUP_HW(fb);
WRITE_WORD(0x2EA0D000, fb, REG_11);
WRITE_WORD(0x23000302, fb, REG_14);
WRITE_WORD(BufferNumber, fb, REG_12);
WRITE_WORD(0xffffffff, fb, REG_8);
}
static void
SET_ATTR_SIZE(struct stifb_info *fb, int width, int height)
{
/* REG_6 seems to have special values when run on a
RDI precisionbook parisc laptop (INTERNAL_EG_DX1024 or
INTERNAL_EG_X1024). The values are:
0x2f0: internal (LCD) & external display enabled
0x2a0: external display only
0x000: zero on standard artist graphic cards
*/
WRITE_WORD(0x00000000, fb, REG_6);
WRITE_WORD((width<<16) | height, fb, REG_9);
WRITE_WORD(0x05000000, fb, REG_6);
WRITE_WORD(0x00040001, fb, REG_9);
}
static void
FINISH_ATTR_ACCESS(struct stifb_info *fb)
{
SETUP_HW(fb);
WRITE_WORD(0x00000000, fb, REG_12);
}
static void
elkSetupPlanes(struct stifb_info *fb)
{
SETUP_RAMDAC(fb);
SETUP_FB(fb);
}
static void
ngleSetupAttrPlanes(struct stifb_info *fb, int BufferNumber)
{
SETUP_ATTR_ACCESS(fb, BufferNumber);
SET_ATTR_SIZE(fb, fb->info.var.xres, fb->info.var.yres);
FINISH_ATTR_ACCESS(fb);
SETUP_FB(fb);
}
static void
rattlerSetupPlanes(struct stifb_info *fb)
{
int saved_id, y;
/* Write RAMDAC pixel read mask register so all overlay
* planes are display-enabled. (CRX24 uses Bt462 pixel
* read mask register for overlay planes, not image planes).
*/
CRX24_SETUP_RAMDAC(fb);
/* change fb->id temporarily to fool SETUP_FB() */
saved_id = fb->id;
fb->id = CRX24_OVERLAY_PLANES;
SETUP_FB(fb);
fb->id = saved_id;
for (y = 0; y < fb->info.var.yres; ++y)
fb_memset(fb->info.screen_base + y * fb->info.fix.line_length,
0xff, fb->info.var.xres * fb->info.var.bits_per_pixel/8);
CRX24_SET_OVLY_MASK(fb);
SETUP_FB(fb);
}
#define HYPER_CMAP_TYPE 0
#define NGLE_CMAP_INDEXED0_TYPE 0
#define NGLE_CMAP_OVERLAY_TYPE 3
/* typedef of LUT (Colormap) BLT Control Register */
typedef union /* Note assumption that fields are packed left-to-right */
{ u32 all;
struct
{
unsigned enable : 1;
unsigned waitBlank : 1;
unsigned reserved1 : 4;
unsigned lutOffset : 10; /* Within destination LUT */
unsigned lutType : 2; /* Cursor, image, overlay */
unsigned reserved2 : 4;
unsigned length : 10;
} fields;
} NgleLutBltCtl;
#if 0
static NgleLutBltCtl
setNgleLutBltCtl(struct stifb_info *fb, int offsetWithinLut, int length)
{
NgleLutBltCtl lutBltCtl;
/* set enable, zero reserved fields */
lutBltCtl.all = 0x80000000;
lutBltCtl.fields.length = length;
switch (fb->id)
{
case S9000_ID_A1439A: /* CRX24 */
if (fb->var.bits_per_pixel == 8) {
lutBltCtl.fields.lutType = NGLE_CMAP_OVERLAY_TYPE;
lutBltCtl.fields.lutOffset = 0;
} else {
lutBltCtl.fields.lutType = NGLE_CMAP_INDEXED0_TYPE;
lutBltCtl.fields.lutOffset = 0 * 256;
}
break;
case S9000_ID_ARTIST:
lutBltCtl.fields.lutType = NGLE_CMAP_INDEXED0_TYPE;
lutBltCtl.fields.lutOffset = 0 * 256;
break;
default:
lutBltCtl.fields.lutType = NGLE_CMAP_INDEXED0_TYPE;
lutBltCtl.fields.lutOffset = 0;
break;
}
/* Offset points to start of LUT. Adjust for within LUT */
lutBltCtl.fields.lutOffset += offsetWithinLut;
return lutBltCtl;
}
#endif
static NgleLutBltCtl
setHyperLutBltCtl(struct stifb_info *fb, int offsetWithinLut, int length)
{
NgleLutBltCtl lutBltCtl;
/* set enable, zero reserved fields */
lutBltCtl.all = 0x80000000;
lutBltCtl.fields.length = length;
lutBltCtl.fields.lutType = HYPER_CMAP_TYPE;
/* Expect lutIndex to be 0 or 1 for image cmaps, 2 or 3 for overlay cmaps */
if (fb->info.var.bits_per_pixel == 8)
lutBltCtl.fields.lutOffset = 2 * 256;
else
lutBltCtl.fields.lutOffset = 0 * 256;
/* Offset points to start of LUT. Adjust for within LUT */
lutBltCtl.fields.lutOffset += offsetWithinLut;
return lutBltCtl;
}
static void hyperUndoITE(struct stifb_info *fb)
{
int nFreeFifoSlots = 0;
u32 fbAddr;
NGLE_LOCK(fb);
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 1);
WRITE_WORD(0xffffffff, fb, REG_32);
/* Write overlay transparency mask so only entry 255 is transparent */
/* Hardware setup for full-depth write to "magic" location */
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 7);
NGLE_QUICK_SET_DST_BM_ACCESS(fb,
BA(IndexedDcd, Otc04, Ots08, AddrLong,
BAJustPoint(0), BINovly, BAIndexBase(0)));
NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb,
IBOvals(RopSrc, MaskAddrOffset(0),
BitmapExtent08, StaticReg(0),
DataDynamic, MaskOtc, BGx(0), FGx(0)));
/* Now prepare to write to the "magic" location */
fbAddr = NGLE_LONG_FB_ADDRESS(0, 1532, 0);
NGLE_BINC_SET_DSTADDR(fb, fbAddr);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xffffff);
NGLE_BINC_SET_DSTMASK(fb, 0xffffffff);
/* Finally, write a zero to clear the mask */
NGLE_BINC_WRITE32(fb, 0);
NGLE_UNLOCK(fb);
}
static void
ngleDepth8_ClearImagePlanes(struct stifb_info *fb)
{
/* FIXME! */
}
static void
ngleDepth24_ClearImagePlanes(struct stifb_info *fb)
{
/* FIXME! */
}
static void
ngleResetAttrPlanes(struct stifb_info *fb, unsigned int ctlPlaneReg)
{
int nFreeFifoSlots = 0;
u32 packed_dst;
u32 packed_len;
NGLE_LOCK(fb);
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 4);
NGLE_QUICK_SET_DST_BM_ACCESS(fb,
BA(IndexedDcd, Otc32, OtsIndirect,
AddrLong, BAJustPoint(0),
BINattr, BAIndexBase(0)));
NGLE_QUICK_SET_CTL_PLN_REG(fb, ctlPlaneReg);
NGLE_SET_TRANSFERDATA(fb, 0xffffffff);
NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb,
IBOvals(RopSrc, MaskAddrOffset(0),
BitmapExtent08, StaticReg(1),
DataDynamic, MaskOtc,
BGx(0), FGx(0)));
packed_dst = 0;
packed_len = (fb->info.var.xres << 16) | fb->info.var.yres;
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 2);
NGLE_SET_DSTXY(fb, packed_dst);
SET_LENXY_START_RECFILL(fb, packed_len);
/*
* In order to work around an ELK hardware problem (Buffy doesn't
* always flush it's buffers when writing to the attribute
* planes), at least 4 pixels must be written to the attribute
* planes starting at (X == 1280) and (Y != to the last Y written
* by BIF):
*/
if (fb->id == S9000_ID_A1659A) { /* ELK_DEVICE_ID */
/* It's safe to use scanline zero: */
packed_dst = (1280 << 16);
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 2);
NGLE_SET_DSTXY(fb, packed_dst);
packed_len = (4 << 16) | 1;
SET_LENXY_START_RECFILL(fb, packed_len);
} /* ELK Hardware Kludge */
/**** Finally, set the Control Plane Register back to zero: ****/
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 1);
NGLE_QUICK_SET_CTL_PLN_REG(fb, 0);
NGLE_UNLOCK(fb);
}
static void
ngleClearOverlayPlanes(struct stifb_info *fb, int mask, int data)
{
int nFreeFifoSlots = 0;
u32 packed_dst;
u32 packed_len;
NGLE_LOCK(fb);
/* Hardware setup */
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 8);
NGLE_QUICK_SET_DST_BM_ACCESS(fb,
BA(IndexedDcd, Otc04, Ots08, AddrLong,
BAJustPoint(0), BINovly, BAIndexBase(0)));
NGLE_SET_TRANSFERDATA(fb, 0xffffffff); /* Write foreground color */
NGLE_REALLY_SET_IMAGE_FG_COLOR(fb, data);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, mask);
packed_dst = 0;
packed_len = (fb->info.var.xres << 16) | fb->info.var.yres;
NGLE_SET_DSTXY(fb, packed_dst);
/* Write zeroes to overlay planes */
NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb,
IBOvals(RopSrc, MaskAddrOffset(0),
BitmapExtent08, StaticReg(0),
DataDynamic, MaskOtc, BGx(0), FGx(0)));
SET_LENXY_START_RECFILL(fb, packed_len);
NGLE_UNLOCK(fb);
}
static void
hyperResetPlanes(struct stifb_info *fb, int enable)
{
unsigned int controlPlaneReg;
NGLE_LOCK(fb);
if (IS_24_DEVICE(fb))
if (fb->info.var.bits_per_pixel == 32)
controlPlaneReg = 0x04000F00;
else
controlPlaneReg = 0x00000F00; /* 0x00000800 should be enough, but lets clear all 4 bits */
else
controlPlaneReg = 0x00000F00; /* 0x00000100 should be enough, but lets clear all 4 bits */
switch (enable) {
case ENABLE:
/* clear screen */
if (IS_24_DEVICE(fb))
ngleDepth24_ClearImagePlanes(fb);
else
ngleDepth8_ClearImagePlanes(fb);
/* Paint attribute planes for default case.
* On Hyperdrive, this means all windows using overlay cmap 0. */
ngleResetAttrPlanes(fb, controlPlaneReg);
/* clear overlay planes */
ngleClearOverlayPlanes(fb, 0xff, 255);
/**************************************************
** Also need to counteract ITE settings
**************************************************/
hyperUndoITE(fb);
break;
case DISABLE:
/* clear screen */
if (IS_24_DEVICE(fb))
ngleDepth24_ClearImagePlanes(fb);
else
ngleDepth8_ClearImagePlanes(fb);
ngleResetAttrPlanes(fb, controlPlaneReg);
ngleClearOverlayPlanes(fb, 0xff, 0);
break;
case -1: /* RESET */
hyperUndoITE(fb);
ngleResetAttrPlanes(fb, controlPlaneReg);
break;
}
NGLE_UNLOCK(fb);
}
/* Return pointer to in-memory structure holding ELK device-dependent ROM values. */
static void
ngleGetDeviceRomData(struct stifb_info *fb)
{
#if 0
XXX: FIXME: !!!
int *pBytePerLongDevDepData;/* data byte == LSB */
int *pRomTable;
NgleDevRomData *pPackedDevRomData;
int sizePackedDevRomData = sizeof(*pPackedDevRomData);
char *pCard8;
int i;
char *mapOrigin = NULL;
int romTableIdx;
pPackedDevRomData = fb->ngle_rom;
SETUP_HW(fb);
if (fb->id == S9000_ID_ARTIST) {
pPackedDevRomData->cursor_pipeline_delay = 4;
pPackedDevRomData->video_interleaves = 4;
} else {
/* Get pointer to unpacked byte/long data in ROM */
pBytePerLongDevDepData = fb->sti->regions[NGLEDEVDEPROM_CRT_REGION];
/* Tomcat supports several resolutions: 1280x1024, 1024x768, 640x480 */
if (fb->id == S9000_ID_TOMCAT)
{
/* jump to the correct ROM table */
GET_ROMTABLE_INDEX(romTableIdx);
while (romTableIdx > 0)
{
pCard8 = (Card8 *) pPackedDevRomData;
pRomTable = pBytePerLongDevDepData;
/* Pack every fourth byte from ROM into structure */
for (i = 0; i < sizePackedDevRomData; i++)
{
*pCard8++ = (Card8) (*pRomTable++);
}
pBytePerLongDevDepData = (Card32 *)
((Card8 *) pBytePerLongDevDepData +
pPackedDevRomData->sizeof_ngle_data);
romTableIdx--;
}
}
pCard8 = (Card8 *) pPackedDevRomData;
/* Pack every fourth byte from ROM into structure */
for (i = 0; i < sizePackedDevRomData; i++)
{
*pCard8++ = (Card8) (*pBytePerLongDevDepData++);
}
}
SETUP_FB(fb);
#endif
}
#define HYPERBOWL_MODE_FOR_8_OVER_88_LUT0_NO_TRANSPARENCIES 4
#define HYPERBOWL_MODE01_8_24_LUT0_TRANSPARENT_LUT1_OPAQUE 8
#define HYPERBOWL_MODE01_8_24_LUT0_OPAQUE_LUT1_OPAQUE 10
#define HYPERBOWL_MODE2_8_24 15
/* HCRX specific boot-time initialization */
static void __init
SETUP_HCRX(struct stifb_info *fb)
{
int hyperbowl;
int nFreeFifoSlots = 0;
if (fb->id != S9000_ID_HCRX)
return;
/* Initialize Hyperbowl registers */
GET_FIFO_SLOTS(fb, nFreeFifoSlots, 7);
if (IS_24_DEVICE(fb)) {
hyperbowl = (fb->info.var.bits_per_pixel == 32) ?
HYPERBOWL_MODE01_8_24_LUT0_TRANSPARENT_LUT1_OPAQUE :
HYPERBOWL_MODE01_8_24_LUT0_OPAQUE_LUT1_OPAQUE;
/* First write to Hyperbowl must happen twice (bug) */
WRITE_WORD(hyperbowl, fb, REG_40);
WRITE_WORD(hyperbowl, fb, REG_40);
WRITE_WORD(HYPERBOWL_MODE2_8_24, fb, REG_39);
WRITE_WORD(0x014c0148, fb, REG_42); /* Set lut 0 to be the direct color */
WRITE_WORD(0x404c4048, fb, REG_43);
WRITE_WORD(0x034c0348, fb, REG_44);
WRITE_WORD(0x444c4448, fb, REG_45);
} else {
hyperbowl = HYPERBOWL_MODE_FOR_8_OVER_88_LUT0_NO_TRANSPARENCIES;
/* First write to Hyperbowl must happen twice (bug) */
WRITE_WORD(hyperbowl, fb, REG_40);
WRITE_WORD(hyperbowl, fb, REG_40);
WRITE_WORD(0x00000000, fb, REG_42);
WRITE_WORD(0x00000000, fb, REG_43);
WRITE_WORD(0x00000000, fb, REG_44);
WRITE_WORD(0x444c4048, fb, REG_45);
}
}
/* ------------------- driver specific functions --------------------------- */
static int
stifb_setcolreg(u_int regno, u_int red, u_int green,
u_int blue, u_int transp, struct fb_info *info)
{
struct stifb_info *fb = container_of(info, struct stifb_info, info);
u32 color;
if (regno >= NR_PALETTE)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
DEBUG_OFF();
START_IMAGE_COLORMAP_ACCESS(fb);
if (unlikely(fb->info.var.grayscale)) {
/* gray = 0.30*R + 0.59*G + 0.11*B */
color = ((red * 77) +
(green * 151) +
(blue * 28)) >> 8;
} else {
color = ((red << 16) |
(green << 8) |
(blue));
}
if (fb->info.fix.visual == FB_VISUAL_DIRECTCOLOR) {
struct fb_var_screeninfo *var = &fb->info.var;
if (regno < 16)
((u32 *)fb->info.pseudo_palette)[regno] =
regno << var->red.offset |
regno << var->green.offset |
regno << var->blue.offset;
}
WRITE_IMAGE_COLOR(fb, regno, color);
if (fb->id == S9000_ID_HCRX) {
NgleLutBltCtl lutBltCtl;
lutBltCtl = setHyperLutBltCtl(fb,
0, /* Offset w/i LUT */
256); /* Load entire LUT */
NGLE_BINC_SET_SRCADDR(fb,
NGLE_LONG_FB_ADDRESS(0, 0x100, 0));
/* 0x100 is same as used in WRITE_IMAGE_COLOR() */
START_COLORMAPLOAD(fb, lutBltCtl.all);
SETUP_FB(fb);
} else {
/* cleanup colormap hardware */
FINISH_IMAGE_COLORMAP_ACCESS(fb);
}
DEBUG_ON();
return 0;
}
static int
stifb_blank(int blank_mode, struct fb_info *info)
{
struct stifb_info *fb = container_of(info, struct stifb_info, info);
int enable = (blank_mode == 0) ? ENABLE : DISABLE;
switch (fb->id) {
case S9000_ID_A1439A:
CRX24_ENABLE_DISABLE_DISPLAY(fb, enable);
break;
case CRT_ID_VISUALIZE_EG:
case S9000_ID_ARTIST:
ARTIST_ENABLE_DISABLE_DISPLAY(fb, enable);
break;
case S9000_ID_HCRX:
HYPER_ENABLE_DISABLE_DISPLAY(fb, enable);
break;
case S9000_ID_A1659A: /* fall through */
case S9000_ID_TIMBER:
case CRX24_OVERLAY_PLANES:
default:
ENABLE_DISABLE_DISPLAY(fb, enable);
break;
}
SETUP_FB(fb);
return 0;
}
static void
stifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
{
struct stifb_info *fb = container_of(info, struct stifb_info, info);
SETUP_COPYAREA(fb);
SETUP_HW(fb);
if (fb->info.var.bits_per_pixel == 32) {
WRITE_WORD(0xBBA0A000, fb, REG_10);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xffffffff);
} else {
WRITE_WORD(fb->id == S9000_ID_HCRX ? 0x13a02000 : 0x13a01000, fb, REG_10);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xff);
}
NGLE_QUICK_SET_IMAGE_BITMAP_OP(fb,
IBOvals(RopSrc, MaskAddrOffset(0),
BitmapExtent08, StaticReg(1),
DataDynamic, MaskOtc, BGx(0), FGx(0)));
WRITE_WORD(((area->sx << 16) | area->sy), fb, REG_24);
WRITE_WORD(((area->width << 16) | area->height), fb, REG_7);
WRITE_WORD(((area->dx << 16) | area->dy), fb, REG_25);
SETUP_FB(fb);
}
static void __init
stifb_init_display(struct stifb_info *fb)
{
int id = fb->id;
SETUP_FB(fb);
/* HCRX specific initialization */
SETUP_HCRX(fb);
/*
if (id == S9000_ID_HCRX)
hyperInitSprite(fb);
else
ngleInitSprite(fb);
*/
/* Initialize the image planes. */
switch (id) {
case S9000_ID_HCRX:
hyperResetPlanes(fb, ENABLE);
break;
case S9000_ID_A1439A:
rattlerSetupPlanes(fb);
break;
case S9000_ID_A1659A:
case S9000_ID_ARTIST:
case CRT_ID_VISUALIZE_EG:
elkSetupPlanes(fb);
break;
}
/* Clear attribute planes on non HCRX devices. */
switch (id) {
case S9000_ID_A1659A:
case S9000_ID_A1439A:
if (fb->info.var.bits_per_pixel == 32)
ngleSetupAttrPlanes(fb, BUFF1_CMAP3);
else {
ngleSetupAttrPlanes(fb, BUFF1_CMAP0);
}
if (id == S9000_ID_A1439A)
ngleClearOverlayPlanes(fb, 0xff, 0);
break;
case S9000_ID_ARTIST:
case CRT_ID_VISUALIZE_EG:
if (fb->info.var.bits_per_pixel == 32)
ngleSetupAttrPlanes(fb, BUFF1_CMAP3);
else {
ngleSetupAttrPlanes(fb, ARTIST_CMAP0);
}
break;
}
stifb_blank(0, (struct fb_info *)fb); /* 0=enable screen */
SETUP_FB(fb);
}
/* ------------ Interfaces to hardware functions ------------ */
static struct fb_ops stifb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = stifb_setcolreg,
.fb_blank = stifb_blank,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = stifb_copyarea,
.fb_imageblit = cfb_imageblit,
};
/*
* Initialization
*/
static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
{
struct fb_fix_screeninfo *fix;
struct fb_var_screeninfo *var;
struct stifb_info *fb;
struct fb_info *info;
unsigned long sti_rom_address;
char *dev_name;
int bpp, xres, yres;
fb = kzalloc(sizeof(*fb), GFP_ATOMIC);
if (!fb)
return -ENOMEM;
info = &fb->info;
/* set struct to a known state */
fix = &info->fix;
var = &info->var;
fb->sti = sti;
dev_name = sti->sti_data->inq_outptr.dev_name;
/* store upper 32bits of the graphics id */
fb->id = fb->sti->graphics_id[0];
/* only supported cards are allowed */
switch (fb->id) {
case CRT_ID_VISUALIZE_EG:
/* Visualize cards can run either in "double buffer" or
"standard" mode. Depending on the mode, the card reports
a different device name, e.g. "INTERNAL_EG_DX1024" in double
buffer mode and "INTERNAL_EG_X1024" in standard mode.
Since this driver only supports standard mode, we check
if the device name contains the string "DX" and tell the
user how to reconfigure the card. */
if (strstr(dev_name, "DX")) {
printk(KERN_WARNING
"WARNING: stifb framebuffer driver does not support '%s' in double-buffer mode.\n"
"WARNING: Please disable the double-buffer mode in IPL menu (the PARISC-BIOS).\n",
dev_name);
goto out_err0;
}
/* fall though */
case S9000_ID_ARTIST:
case S9000_ID_HCRX:
case S9000_ID_TIMBER:
case S9000_ID_A1659A:
case S9000_ID_A1439A:
break;
default:
printk(KERN_WARNING "stifb: '%s' (id: 0x%08x) not supported.\n",
dev_name, fb->id);
goto out_err0;
}
/* default to 8 bpp on most graphic chips */
bpp = 8;
xres = sti_onscreen_x(fb->sti);
yres = sti_onscreen_y(fb->sti);
ngleGetDeviceRomData(fb);
/* get (virtual) io region base addr */
fix->mmio_start = REGION_BASE(fb,2);
fix->mmio_len = 0x400000;
/* Reject any device not in the NGLE family */
switch (fb->id) {
case S9000_ID_A1659A: /* CRX/A1659A */
break;
case S9000_ID_ELM: /* GRX, grayscale but else same as A1659A */
var->grayscale = 1;
fb->id = S9000_ID_A1659A;
break;
case S9000_ID_TIMBER: /* HP9000/710 Any (may be a grayscale device) */
if (strstr(dev_name, "GRAYSCALE") ||
strstr(dev_name, "Grayscale") ||
strstr(dev_name, "grayscale"))
var->grayscale = 1;
break;
case S9000_ID_TOMCAT: /* Dual CRX, behaves else like a CRX */
/* FIXME: TomCat supports two heads:
* fb.iobase = REGION_BASE(fb_info,3);
* fb.screen_base = ioremap_nocache(REGION_BASE(fb_info,2),xxx);
* for now we only support the left one ! */
xres = fb->ngle_rom.x_size_visible;
yres = fb->ngle_rom.y_size_visible;
fb->id = S9000_ID_A1659A;
break;
case S9000_ID_A1439A: /* CRX24/A1439A */
bpp = 32;
break;
case S9000_ID_HCRX: /* Hyperdrive/HCRX */
memset(&fb->ngle_rom, 0, sizeof(fb->ngle_rom));
if ((fb->sti->regions_phys[0] & 0xfc000000) ==
(fb->sti->regions_phys[2] & 0xfc000000))
sti_rom_address = F_EXTEND(fb->sti->regions_phys[0]);
else
sti_rom_address = F_EXTEND(fb->sti->regions_phys[1]);
fb->deviceSpecificConfig = gsc_readl(sti_rom_address);
if (IS_24_DEVICE(fb)) {
if (bpp_pref == 8 || bpp_pref == 32)
bpp = bpp_pref;
else
bpp = 32;
} else
bpp = 8;
READ_WORD(fb, REG_15);
SETUP_HW(fb);
break;
case CRT_ID_VISUALIZE_EG:
case S9000_ID_ARTIST: /* Artist */
break;
default:
#ifdef FALLBACK_TO_1BPP
printk(KERN_WARNING
"stifb: Unsupported graphics card (id=0x%08x) "
"- now trying 1bpp mode instead\n",
fb->id);
bpp = 1; /* default to 1 bpp */
break;
#else
printk(KERN_WARNING
"stifb: Unsupported graphics card (id=0x%08x) "
"- skipping.\n",
fb->id);
goto out_err0;
#endif
}
/* get framebuffer physical and virtual base addr & len (64bit ready) */
fix->smem_start = F_EXTEND(fb->sti->regions_phys[1]);
fix->smem_len = fb->sti->regions[1].region_desc.length * 4096;
fix->line_length = (fb->sti->glob_cfg->total_x * bpp) / 8;
if (!fix->line_length)
fix->line_length = 2048; /* default */
/* limit fbsize to max visible screen size */
if (fix->smem_len > yres*fix->line_length)
fix->smem_len = yres*fix->line_length;
fix->accel = FB_ACCEL_NONE;
switch (bpp) {
case 1:
fix->type = FB_TYPE_PLANES; /* well, sort of */
fix->visual = FB_VISUAL_MONO10;
var->red.length = var->green.length = var->blue.length = 1;
break;
case 8:
fix->type = FB_TYPE_PACKED_PIXELS;
fix->visual = FB_VISUAL_PSEUDOCOLOR;
var->red.length = var->green.length = var->blue.length = 8;
break;
case 32:
fix->type = FB_TYPE_PACKED_PIXELS;
fix->visual = FB_VISUAL_DIRECTCOLOR;
var->red.length = var->green.length = var->blue.length = var->transp.length = 8;
var->blue.offset = 0;
var->green.offset = 8;
var->red.offset = 16;
var->transp.offset = 24;
break;
default:
break;
}
var->xres = var->xres_virtual = xres;
var->yres = var->yres_virtual = yres;
var->bits_per_pixel = bpp;
strcpy(fix->id, "stifb");
info->fbops = &stifb_ops;
info->screen_base = ioremap_nocache(REGION_BASE(fb,1), fix->smem_len);
if (!info->screen_base) {
printk(KERN_ERR "stifb: failed to map memory\n");
goto out_err0;
}
info->screen_size = fix->smem_len;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA;
info->pseudo_palette = &fb->pseudo_palette;
/* This has to be done !!! */
if (fb_alloc_cmap(&info->cmap, NR_PALETTE, 0))
goto out_err1;
stifb_init_display(fb);
if (!request_mem_region(fix->smem_start, fix->smem_len, "stifb fb")) {
printk(KERN_ERR "stifb: cannot reserve fb region 0x%04lx-0x%04lx\n",
fix->smem_start, fix->smem_start+fix->smem_len);
goto out_err2;
}
if (!request_mem_region(fix->mmio_start, fix->mmio_len, "stifb mmio")) {
printk(KERN_ERR "stifb: cannot reserve sti mmio region 0x%04lx-0x%04lx\n",
fix->mmio_start, fix->mmio_start+fix->mmio_len);
goto out_err3;
}
if (register_framebuffer(&fb->info) < 0)
goto out_err4;
sti->info = info; /* save for unregister_framebuffer() */
fb_info(&fb->info, "%s %dx%d-%d frame buffer device, %s, id: %04x, mmio: 0x%04lx\n",
fix->id,
var->xres,
var->yres,
var->bits_per_pixel,
dev_name,
fb->id,
fix->mmio_start);
return 0;
out_err4:
release_mem_region(fix->mmio_start, fix->mmio_len);
out_err3:
release_mem_region(fix->smem_start, fix->smem_len);
out_err2:
fb_dealloc_cmap(&info->cmap);
out_err1:
iounmap(info->screen_base);
out_err0:
kfree(fb);
return -ENXIO;
}
static int stifb_disabled __initdata;
int __init
stifb_setup(char *options);
static int __init stifb_init(void)
{
struct sti_struct *sti;
struct sti_struct *def_sti;
int i;
#ifndef MODULE
char *option = NULL;
if (fb_get_options("stifb", &option))
return -ENODEV;
stifb_setup(option);
#endif
if (stifb_disabled) {
printk(KERN_INFO "stifb: disabled by \"stifb=off\" kernel parameter\n");
return -ENXIO;
}
def_sti = sti_get_rom(0);
if (def_sti) {
for (i = 1; i <= MAX_STI_ROMS; i++) {
sti = sti_get_rom(i);
if (!sti)
break;
if (sti == def_sti) {
stifb_init_fb(sti, stifb_bpp_pref[i - 1]);
break;
}
}
}
for (i = 1; i <= MAX_STI_ROMS; i++) {
sti = sti_get_rom(i);
if (!sti)
break;
if (sti == def_sti)
continue;
stifb_init_fb(sti, stifb_bpp_pref[i - 1]);
}
return 0;
}
/*
* Cleanup
*/
static void __exit
stifb_cleanup(void)
{
struct sti_struct *sti;
int i;
for (i = 1; i <= MAX_STI_ROMS; i++) {
sti = sti_get_rom(i);
if (!sti)
break;
if (sti->info) {
struct fb_info *info = sti->info;
unregister_framebuffer(sti->info);
release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
release_mem_region(info->fix.smem_start, info->fix.smem_len);
if (info->screen_base)
iounmap(info->screen_base);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
}
sti->info = NULL;
}
}
int __init
stifb_setup(char *options)
{
int i;
if (!options || !*options)
return 1;
if (strncmp(options, "off", 3) == 0) {
stifb_disabled = 1;
options += 3;
}
if (strncmp(options, "bpp", 3) == 0) {
options += 3;
for (i = 0; i < MAX_STI_ROMS; i++) {
if (*options++ != ':')
break;
stifb_bpp_pref[i] = simple_strtoul(options, &options, 10);
}
}
return 1;
}
__setup("stifb=", stifb_setup);
module_init(stifb_init);
module_exit(stifb_cleanup);
MODULE_AUTHOR("Helge Deller <deller@gmx.de>, Thomas Bogendoerfer <tsbogend@alpha.franken.de>");
MODULE_DESCRIPTION("Framebuffer driver for HP's NGLE series graphics cards in HP PARISC machines");
MODULE_LICENSE("GPL v2");