/*
* linux/drivers/video/sgivwfb.c -- SGI DBE frame buffer device
*
* Copyright (C) 1999 Silicon Graphics, Inc.
* Jeffrey Newquist, newquist@engr.sgi.som
*
* 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.
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <asm/uaccess.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb32.h>
#define INCLUDE_TIMING_TABLE_DATA
#define DBE_REG_BASE regs
#include "sgivwfb.h"
struct sgivwfb_par {
struct fb_var_screeninfo var;
u_long timing_num;
int valid;
};
/*
* RAM we reserve for the frame buffer. This defines the maximum screen
* size
*
* The default can be overridden if the driver is compiled as a module
*/
/* set by arch/i386/kernel/setup.c */
u_long sgivwfb_mem_phys;
u_long sgivwfb_mem_size;
static volatile char *fbmem;
static asregs *regs;
static struct fb_info fb_info;
static struct { u_char red, green, blue, pad; } palette[256];
static char sgivwfb_name[16] = "SGI Vis WS FB";
static u32 cmap_fifo;
static int ypan = 0;
static int ywrap = 0;
/* console related variables */
static int currcon = 0;
static struct display disp;
static union {
#ifdef FBCON_HAS_CFB16
u16 cfb16[16];
#endif
#ifdef FBCON_HAS_CFB32
u32 cfb32[16];
#endif
} fbcon_cmap;
static struct sgivwfb_par par_current = {
{ /* var (screeninfo) */
/* 640x480, 8 bpp */
640, 480, 640, 480, 0, 0, 8, 0,
{0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
0, 0, -1, -1, 0, 20000, 64, 64, 32, 32, 64, 2,
0, FB_VMODE_NONINTERLACED
},
0, /* timing_num */
0 /* par not activated */
};
/*
* Interface used by the world
*/
int sgivwfb_setup(char*);
static int sgivwfb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info);
static int sgivwfb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int sgivwfb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info);
static int sgivwfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int sgivwfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info);
static int sgivwfb_mmap(struct fb_info *info, struct file *file,
struct vm_area_struct *vma);
static struct fb_ops sgivwfb_ops = {
owner: THIS_MODULE,
fb_get_fix: sgivwfb_get_fix,
fb_get_var: sgivwfb_get_var,
fb_set_var: sgivwfb_set_var,
fb_get_cmap: sgivwfb_get_cmap,
fb_set_cmap: sgivwfb_set_cmap,
fb_mmap: sgivwfb_mmap,
};
/*
* Interface to the low level console driver
*/
int sgivwfb_init(void);
static int sgivwfbcon_switch(int con, struct fb_info *info);
static int sgivwfbcon_updatevar(int con, struct fb_info *info);
static void sgivwfbcon_blank(int blank, struct fb_info *info);
/*
* Internal routines
*/
static u_long get_line_length(int xres_virtual, int bpp);
static unsigned long bytes_per_pixel(int bpp);
static void activate_par(struct sgivwfb_par *par);
static void sgivwfb_encode_fix(struct fb_fix_screeninfo *fix,
struct fb_var_screeninfo *var);
static int sgivwfb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info);
static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info);
static void do_install_cmap(int con, struct fb_info *info);
static unsigned long get_line_length(int xres_virtual, int bpp)
{
return(xres_virtual * bytes_per_pixel(bpp));
}
static unsigned long bytes_per_pixel(int bpp)
{
unsigned long length;
switch (bpp) {
case 8:
length = 1;
break;
case 16:
length = 2;
break;
case 32:
length = 4;
break;
default:
printk(KERN_INFO "sgivwfb: unsupported bpp=%d\n", bpp);
length = 0;
break;
}
return(length);
}
/*
* Function: dbe_TurnOffDma
* Parameters: (None)
* Description: This should turn off the monitor and dbe. This is used
* when switching between the serial console and the graphics
* console.
*/
static void dbe_TurnOffDma(void)
{
int i;
unsigned int readVal;
// Check to see if things are already turned off:
// 1) Check to see if dbe is not using the internal dotclock.
// 2) Check to see if the xy counter in dbe is already off.
DBE_GETREG(ctrlstat, readVal);
if (GET_DBE_FIELD(CTRLSTAT, PCLKSEL, readVal) < 2)
return;
DBE_GETREG(vt_xy, readVal);
if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
return;
// Otherwise, turn off dbe
DBE_GETREG(ovr_control, readVal);
SET_DBE_FIELD(OVR_CONTROL, OVR_DMA_ENABLE, readVal, 0);
DBE_SETREG(ovr_control, readVal);
udelay(1000);
DBE_GETREG(frm_control, readVal);
SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, readVal, 0);
DBE_SETREG(frm_control, readVal);
udelay(1000);
DBE_GETREG(did_control, readVal);
SET_DBE_FIELD(DID_CONTROL, DID_DMA_ENABLE, readVal, 0);
DBE_SETREG(did_control, readVal);
udelay(1000);
// XXX HACK:
//
// This was necessary for GBE--we had to wait through two
// vertical retrace periods before the pixel DMA was
// turned off for sure. I've left this in for now, in
// case dbe needs it.
for (i = 0; i < 10000; i++)
{
DBE_GETREG(frm_inhwctrl, readVal);
if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) == 0)
udelay(10);
else
{
DBE_GETREG(ovr_inhwctrl, readVal);
if (GET_DBE_FIELD(OVR_INHWCTRL, OVR_DMA_ENABLE, readVal) == 0)
udelay(10);
else
{
DBE_GETREG(did_inhwctrl, readVal);
if (GET_DBE_FIELD(DID_INHWCTRL, DID_DMA_ENABLE, readVal) == 0)
udelay(10);
else
break;
}
}
}
}
/*
* Set the hardware according to 'par'.
*/
static void activate_par(struct sgivwfb_par *par)
{
int i,j, htmp, temp;
u32 readVal, outputVal;
int wholeTilesX, maxPixelsPerTileX;
int frmWrite1, frmWrite2, frmWrite3b;
dbe_timing_info_t *currentTiming; /* Current Video Timing */
int xpmax, ypmax; // Monitor resolution
int bytesPerPixel; // Bytes per pixel
currentTiming = &dbeVTimings[par->timing_num];
bytesPerPixel = bytes_per_pixel(par->var.bits_per_pixel);
xpmax = currentTiming->width;
ypmax = currentTiming->height;
/* dbe_InitGraphicsBase(); */
/* Turn on dotclock PLL */
DBE_SETREG(ctrlstat, 0x20000000);
dbe_TurnOffDma();
/* dbe_CalculateScreenParams(); */
maxPixelsPerTileX = 512/bytesPerPixel;
wholeTilesX = xpmax/maxPixelsPerTileX;
if (wholeTilesX*maxPixelsPerTileX < xpmax)
wholeTilesX++;
printk(KERN_DEBUG "sgivwfb: pixPerTile=%d wholeTilesX=%d\n",
maxPixelsPerTileX, wholeTilesX);
/* dbe_InitGammaMap(); */
udelay(10);
for (i = 0; i < 256; i++)
{
DBE_ISETREG(gmap, i, (i << 24) | (i << 16) | (i << 8));
}
/* dbe_TurnOn(); */
DBE_GETREG(vt_xy, readVal);
if (GET_DBE_FIELD(VT_XY, VT_FREEZE, readVal) == 1)
{
DBE_SETREG(vt_xy, 0x00000000);
udelay(1);
}
else
dbe_TurnOffDma();
/* dbe_Initdbe(); */
for (i = 0; i < 256; i++)
{
for (j = 0; j < 100; j++)
{
DBE_GETREG(cm_fifo, readVal);
if (readVal != 0x00000000)
break;
else
udelay(10);
}
// DBE_ISETREG(cmap, i, 0x00000000);
DBE_ISETREG(cmap, i, (i<<8)|(i<<16)|(i<<24));
}
/* dbe_InitFramebuffer(); */
frmWrite1 = 0;
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_WIDTH_TILE, frmWrite1, wholeTilesX);
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_RHS, frmWrite1, 0);
switch(bytesPerPixel)
{
case 1:
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1, DBE_FRM_DEPTH_8);
break;
case 2:
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1, DBE_FRM_DEPTH_16);
break;
case 4:
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_DEPTH, frmWrite1, DBE_FRM_DEPTH_32);
break;
}
frmWrite2 = 0;
SET_DBE_FIELD(FRM_SIZE_PIXEL, FB_HEIGHT_PIX, frmWrite2, ypmax);
// Tell dbe about the framebuffer location and type
// XXX What format is the FRM_TILE_PTR?? 64K aligned address?
frmWrite3b = 0;
SET_DBE_FIELD(FRM_CONTROL, FRM_TILE_PTR, frmWrite3b, sgivwfb_mem_phys>>9);
SET_DBE_FIELD(FRM_CONTROL, FRM_DMA_ENABLE, frmWrite3b, 1);
SET_DBE_FIELD(FRM_CONTROL, FRM_LINEAR, frmWrite3b, 1);
/* Initialize DIDs */
outputVal = 0;
switch(bytesPerPixel)
{
case 1:
SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_I8);
break;
case 2:
SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGBA5);
break;
case 4:
SET_DBE_FIELD(WID, TYP, outputVal, DBE_CMODE_RGB8);
break;
}
SET_DBE_FIELD(WID, BUF, outputVal, DBE_BMODE_BOTH);
for (i = 0; i < 32; i++)
{
DBE_ISETREG(mode_regs, i, outputVal);
}
/* dbe_InitTiming(); */
DBE_SETREG(vt_intr01, 0xffffffff);
DBE_SETREG(vt_intr23, 0xffffffff);
DBE_GETREG(dotclock, readVal);
DBE_SETREG(dotclock, readVal & 0xffff);
DBE_SETREG(vt_xymax, 0x00000000);
outputVal = 0;
SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_ON, outputVal, currentTiming->vsync_start);
SET_DBE_FIELD(VT_VSYNC, VT_VSYNC_OFF, outputVal, currentTiming->vsync_end);
DBE_SETREG(vt_vsync, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_ON, outputVal, currentTiming->hsync_start);
SET_DBE_FIELD(VT_HSYNC, VT_HSYNC_OFF, outputVal, currentTiming->hsync_end);
DBE_SETREG(vt_hsync, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_ON, outputVal, currentTiming->vblank_start);
SET_DBE_FIELD(VT_VBLANK, VT_VBLANK_OFF, outputVal, currentTiming->vblank_end);
DBE_SETREG(vt_vblank, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_ON, outputVal, currentTiming->hblank_start);
SET_DBE_FIELD(VT_HBLANK, VT_HBLANK_OFF, outputVal, currentTiming->hblank_end-3);
DBE_SETREG(vt_hblank, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_ON, outputVal, currentTiming->vblank_start);
SET_DBE_FIELD(VT_VCMAP, VT_VCMAP_OFF, outputVal, currentTiming->vblank_end);
DBE_SETREG(vt_vcmap, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_ON, outputVal, currentTiming->hblank_start);
SET_DBE_FIELD(VT_HCMAP, VT_HCMAP_OFF, outputVal, currentTiming->hblank_end-3);
DBE_SETREG(vt_hcmap, outputVal);
outputVal = 0;
temp = currentTiming->vblank_start - currentTiming->vblank_end - 1;
if (temp > 0)
temp = -temp;
SET_DBE_FIELD(DID_START_XY, DID_STARTY, outputVal, (u32)temp);
if (currentTiming->hblank_end >= 20)
SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
currentTiming->hblank_end - 20);
else
SET_DBE_FIELD(DID_START_XY, DID_STARTX, outputVal,
currentTiming->htotal - (20 - currentTiming->hblank_end));
DBE_SETREG(did_start_xy, outputVal);
outputVal = 0;
SET_DBE_FIELD(CRS_START_XY, CRS_STARTY, outputVal, (u32)(temp+1));
if (currentTiming->hblank_end >= DBE_CRS_MAGIC)
SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
currentTiming->hblank_end - DBE_CRS_MAGIC);
else
SET_DBE_FIELD(CRS_START_XY, CRS_STARTX, outputVal,
currentTiming->htotal - (DBE_CRS_MAGIC - currentTiming->hblank_end));
DBE_SETREG(crs_start_xy, outputVal);
outputVal = 0;
SET_DBE_FIELD(VC_START_XY, VC_STARTY, outputVal, (u32)temp);
SET_DBE_FIELD(VC_START_XY, VC_STARTX, outputVal,
currentTiming->hblank_end - 4);
DBE_SETREG(vc_start_xy, outputVal);
DBE_SETREG(frm_size_tile, frmWrite1);
DBE_SETREG(frm_size_pixel, frmWrite2);
outputVal = 0;
SET_DBE_FIELD(DOTCLK, M, outputVal, currentTiming->pll_m-1);
SET_DBE_FIELD(DOTCLK, N, outputVal, currentTiming->pll_n-1);
SET_DBE_FIELD(DOTCLK, P, outputVal, currentTiming->pll_p);
SET_DBE_FIELD(DOTCLK, RUN, outputVal, 1);
DBE_SETREG(dotclock, outputVal);
udelay(11*1000);
DBE_SETREG(vt_vpixen, 0xffffff);
DBE_SETREG(vt_hpixen, 0xffffff);
outputVal = 0;
SET_DBE_FIELD(VT_XYMAX, VT_MAXX, outputVal, currentTiming->htotal);
SET_DBE_FIELD(VT_XYMAX, VT_MAXY, outputVal, currentTiming->vtotal);
DBE_SETREG(vt_xymax, outputVal);
outputVal = frmWrite1;
SET_DBE_FIELD(FRM_SIZE_TILE, FRM_FIFO_RESET, outputVal, 1);
DBE_SETREG(frm_size_tile, outputVal);
DBE_SETREG(frm_size_tile, frmWrite1);
outputVal = 0;
SET_DBE_FIELD(OVR_WIDTH_TILE, OVR_FIFO_RESET, outputVal, 1);
DBE_SETREG(ovr_width_tile, outputVal);
DBE_SETREG(ovr_width_tile, 0);
DBE_SETREG(frm_control, frmWrite3b);
DBE_SETREG(did_control, 0);
// Wait for dbe to take frame settings
for (i=0; i<100000; i++)
{
DBE_GETREG(frm_inhwctrl, readVal);
if (GET_DBE_FIELD(FRM_INHWCTRL, FRM_DMA_ENABLE, readVal) != 0)
break;
else
udelay(1);
}
if (i==100000)
printk(KERN_INFO "sgivwfb: timeout waiting for frame DMA enable.\n");
outputVal = 0;
htmp = currentTiming->hblank_end - 19;
if (htmp < 0)
htmp += currentTiming->htotal; /* allow blank to wrap around */
SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_ON, outputVal, htmp);
SET_DBE_FIELD(VT_HPIXEN, VT_HPIXEN_OFF, outputVal,
((htmp + currentTiming->width - 2) % currentTiming->htotal));
DBE_SETREG(vt_hpixen, outputVal);
outputVal = 0;
SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_OFF, outputVal,
currentTiming->vblank_start);
SET_DBE_FIELD(VT_VPIXEN, VT_VPIXEN_ON, outputVal,
currentTiming->vblank_end);
DBE_SETREG(vt_vpixen, outputVal);
// Turn off mouse cursor
regs->crs_ctl = 0;
// XXX What's this section for??
DBE_GETREG(ctrlstat, readVal);
readVal &= 0x02000000;
if (readVal != 0)
{
DBE_SETREG(ctrlstat, 0x30000000);
}
}
static void sgivwfb_encode_fix(struct fb_fix_screeninfo *fix,
struct fb_var_screeninfo *var)
{
memset(fix, 0, sizeof(struct fb_fix_screeninfo));
strcpy(fix->id, sgivwfb_name);
fix->smem_start = sgivwfb_mem_phys;
fix->smem_len = sgivwfb_mem_size;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
switch (var->bits_per_pixel) {
case 8:
fix->visual = FB_VISUAL_PSEUDOCOLOR;
break;
default:
fix->visual = FB_VISUAL_TRUECOLOR;
break;
}
fix->ywrapstep = ywrap;
fix->xpanstep = 0;
fix->ypanstep = ypan;
fix->line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
fix->mmio_start = DBE_REG_PHYS;
fix->mmio_len = DBE_REG_SIZE;
}
/*
* Read a single color register and split it into
* colors/transparent. Return != 0 for invalid regno.
*/
static int sgivwfb_getcolreg(u_int regno, u_int *red, u_int *green, u_int *blue,
u_int *transp, struct fb_info *info)
{
if (regno > 255)
return 1;
*red = palette[regno].red << 8;
*green = palette[regno].green << 8;
*blue = palette[regno].blue << 8;
*transp = 0;
return 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.
*/
static int sgivwfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *info)
{
if (regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
palette[regno].red = red;
palette[regno].green = green;
palette[regno].blue = blue;
/* wait for the color map FIFO to have a free entry */
while (cmap_fifo == 0)
cmap_fifo = regs->cm_fifo;
regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
cmap_fifo--; /* assume FIFO is filling up */
return 0;
}
static void do_install_cmap(int con, struct fb_info *info)
{
if (con != currcon)
return;
if (fb_display[con].cmap.len)
fb_set_cmap(&fb_display[con].cmap, 1, sgivwfb_setcolreg, info);
else
fb_set_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel), 1,
sgivwfb_setcolreg, info);
}
/* ---------------------------------------------------- */
/*
* Get the Fixed Part of the Display
*/
static int sgivwfb_get_fix(struct fb_fix_screeninfo *fix, int con,
struct fb_info *info)
{
struct fb_var_screeninfo *var;
if (con == -1)
var = &par_current.var;
else
var = &fb_display[con].var;
sgivwfb_encode_fix(fix, var);
return 0;
}
/*
* Get the User Defined Part of the Display. If a real par get it form there
*/
static int sgivwfb_get_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
if (con == -1)
*var = par_current.var;
else
*var = fb_display[con].var;
return 0;
}
/*
* Set the User Defined Part of the Display. Again if par use it to get
* real video mode.
*/
static int sgivwfb_set_var(struct fb_var_screeninfo *var, int con,
struct fb_info *info)
{
int err, activate = var->activate;
int oldxres, oldyres, oldvxres, oldvyres, oldbpp;
u_long line_length;
u_long min_mode;
int req_dot;
int test_mode;
struct dbe_timing_info *timing;
struct display *display;
if (con >= 0)
display = &fb_display[con];
else
display = &disp; /* used during initialization */
/*
* FB_VMODE_CONUPDATE and FB_VMODE_SMOOTH_XPAN are equal!
* as FB_VMODE_SMOOTH_XPAN is only used internally
*/
if (var->vmode & FB_VMODE_CONUPDATE) {
var->vmode |= FB_VMODE_YWRAP;
var->xoffset = display->var.xoffset;
var->yoffset = display->var.yoffset;
}
/* XXX FIXME - forcing var's */
var->xoffset = 0;
var->yoffset = 0;
/* Limit bpp to 8, 16, and 32 */
if (var->bits_per_pixel <= 8)
var->bits_per_pixel = 8;
else if (var->bits_per_pixel <= 16)
var->bits_per_pixel = 16;
else if (var->bits_per_pixel <= 32)
var->bits_per_pixel = 32;
else
return -EINVAL;
var->grayscale = 0; /* No grayscale for now */
/* determine valid resolution and timing */
for (min_mode=0; min_mode<DBE_VT_SIZE; min_mode++) {
if (dbeVTimings[min_mode].width >= var->xres &&
dbeVTimings[min_mode].height >= var->yres)
break;
}
if (min_mode == DBE_VT_SIZE)
return -EINVAL; /* Resolution to high */
/* XXX FIXME - should try to pick best refresh rate */
/* for now, pick closest dot-clock within 3MHz*/
#error "Floating point not allowed in kernel"
req_dot = (int)((1.0e3/1.0e6) / (1.0e-12 * (float)var->pixclock));
printk(KERN_INFO "sgivwfb: requested pixclock=%d ps (%d KHz)\n", var->pixclock,
req_dot);
test_mode=min_mode;
while (dbeVTimings[min_mode].width == dbeVTimings[test_mode].width) {
if (dbeVTimings[test_mode].cfreq+3000 > req_dot)
break;
test_mode++;
}
if (dbeVTimings[min_mode].width != dbeVTimings[test_mode].width)
test_mode--;
min_mode = test_mode;
timing = &dbeVTimings[min_mode];
printk(KERN_INFO "sgivwfb: granted dot-clock=%d KHz\n", timing->cfreq);
/* Adjust virtual resolution, if necessary */
if (var->xres > var->xres_virtual || (!ywrap && !ypan))
var->xres_virtual = var->xres;
if (var->yres > var->yres_virtual || (!ywrap && !ypan))
var->yres_virtual = var->yres;
/*
* Memory limit
*/
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
if (line_length*var->yres_virtual > sgivwfb_mem_size)
return -ENOMEM; /* Virtual resolution to high */
switch (var->bits_per_pixel)
{
case 8:
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16: /* RGBA 5551 */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 6;
var->green.length = 5;
var->blue.offset = 1;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 32: /* RGB 8888 */
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 16;
var->blue.length = 8;
var->transp.offset = 24;
var->transp.length = 8;
break;
}
var->red.msb_right = 0;
var->green.msb_right = 0;
var->blue.msb_right = 0;
var->transp.msb_right = 0;
/* set video timing information */
var->pixclock = (__u32)(1.0e+9/(float)timing->cfreq);
var->left_margin = timing->htotal - timing->hsync_end;
var->right_margin = timing->hsync_start - timing->width;
var->upper_margin = timing->vtotal - timing->vsync_end;
var->lower_margin = timing->vsync_start - timing->height;
var->hsync_len = timing->hsync_end - timing->hsync_start;
var->vsync_len = timing->vsync_end - timing->vsync_start;
if ((activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
oldxres = display->var.xres;
oldyres = display->var.yres;
oldvxres = display->var.xres_virtual;
oldvyres = display->var.yres_virtual;
oldbpp = display->var.bits_per_pixel;
display->var = *var;
par_current.var = *var;
par_current.timing_num = min_mode;
if (oldxres != var->xres || oldyres != var->yres ||
oldvxres != var->xres_virtual || oldvyres != var->yres_virtual ||
oldbpp != var->bits_per_pixel || !par_current.valid) {
struct fb_fix_screeninfo fix;
printk(KERN_INFO "sgivwfb: new video mode xres=%d yres=%d bpp=%d\n",
var->xres, var->yres, var->bits_per_pixel);
printk(KERN_INFO " vxres=%d vyres=%d\n",
var->xres_virtual, var->yres_virtual);
activate_par(&par_current);
sgivwfb_encode_fix(&fix, var);
display->screen_base = (char *)fbmem;
display->visual = fix.visual;
display->type = fix.type;
display->type_aux = fix.type_aux;
display->ypanstep = fix.ypanstep;
display->ywrapstep = fix.ywrapstep;
display->line_length = fix.line_length;
display->can_soft_blank = 1;
display->inverse = 0;
if (oldbpp != var->bits_per_pixel || !par_current.valid) {
if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
return err;
do_install_cmap(con, info);
}
switch (var->bits_per_pixel) {
#ifdef FBCON_HAS_CFB8
case 8:
display->dispsw = &fbcon_cfb8;
break;
#endif
#ifdef FBCON_HAS_CFB16
case 16:
display->dispsw = &fbcon_cfb16;
display->dispsw_data = fbcon_cmap.cfb16;
break;
#endif
#ifdef FBCON_HAS_CFB32
case 32:
display->dispsw = &fbcon_cfb32;
display->dispsw_data = fbcon_cmap.cfb32;
break;
#endif
default:
display->dispsw = &fbcon_dummy;
break;
}
par_current.valid = 1;
if (fb_info.changevar)
(*fb_info.changevar)(con);
}
}
return 0;
}
/*
* Get the Colormap
*/
static int sgivwfb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
if (con == currcon) /* current console? */
return fb_get_cmap(cmap, kspc, sgivwfb_getcolreg, info);
else if (fb_display[con].cmap.len) /* non default colormap? */
fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
else
fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
cmap, kspc ? 0 : 2);
return 0;
}
/*
* Set the Colormap
*/
static int sgivwfb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
struct fb_info *info)
{
int err;
if (!fb_display[con].cmap.len) { /* no colormap allocated? */
int size = fb_display[con].var.bits_per_pixel == 16 ? 32 : 256;
if ((err = fb_alloc_cmap(&fb_display[con].cmap, size, 0)))
return err;
}
if (con == currcon) /* current console? */
return fb_set_cmap(cmap, kspc, sgivwfb_setcolreg, info);
else
fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
return 0;
}
static int sgivwfb_mmap(struct fb_info *info, struct file *file,
struct vm_area_struct *vma)
{
unsigned long size = vma->vm_end - vma->vm_start;
unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
return -EINVAL;
if (offset+size > sgivwfb_mem_size)
return -EINVAL;
offset += sgivwfb_mem_phys;
pgprot_val(vma->vm_page_prot) = pgprot_val(vma->vm_page_prot) | _PAGE_PCD;
if (remap_page_range(vma->vm_start, offset, size, vma->vm_page_prot))
return -EAGAIN;
vma->vm_file = file;
printk(KERN_DEBUG "sgivwfb: mmap framebuffer P(%lx)->V(%lx)\n", offset, vma->vm_start);
return 0;
}
int __init sgivwfb_setup(char *options)
{
char *this_opt;
fb_info.fontname[0] = '\0';
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "font:", 5))
strcpy(fb_info.fontname, this_opt+5);
}
return 0;
}
/*
* Initialisation
*/
int __init sgivwfb_init(void)
{
printk(KERN_INFO "sgivwfb: framebuffer at 0x%lx, size %ldk\n",
sgivwfb_mem_phys, sgivwfb_mem_size/1024);
regs = (asregs*)ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
if (!regs) {
printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
goto fail_ioremap_regs;
}
#ifdef CONFIG_MTRR
mtrr_add((unsigned long)sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
#endif
strcpy(fb_info.modename, sgivwfb_name);
fb_info.changevar = NULL;
fb_info.node = -1;
fb_info.fbops = &sgivwfb_ops;
fb_info.disp = &disp;
fb_info.switch_con = &sgivwfbcon_switch;
fb_info.updatevar = &sgivwfbcon_updatevar;
fb_info.blank = &sgivwfbcon_blank;
fb_info.flags = FBINFO_FLAG_DEFAULT;
fbmem = ioremap_nocache((unsigned long)sgivwfb_mem_phys, sgivwfb_mem_size);
if (!fbmem) {
printk(KERN_ERR "sgivwfb: couldn't ioremap fbmem\n");
goto fail_ioremap_fbmem;
}
/* turn on default video mode */
sgivwfb_set_var(&par_current.var, -1, &fb_info);
if (register_framebuffer(&fb_info) < 0) {
printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
goto fail_register_framebuffer;
}
printk(KERN_INFO "fb%d: Virtual frame buffer device, using %ldK of video memory\n",
GET_FB_IDX(fb_info.node), sgivwfb_mem_size>>10);
return 0;
fail_register_framebuffer:
iounmap((char*)fbmem);
fail_ioremap_fbmem:
iounmap(regs);
fail_ioremap_regs:
return -ENXIO;
}
static int sgivwfbcon_switch(int con, struct fb_info *info)
{
/* Do we have to save the colormap? */
if (fb_display[currcon].cmap.len)
fb_get_cmap(&fb_display[currcon].cmap, 1, sgivwfb_getcolreg, info);
currcon = con;
/* Install new colormap */
do_install_cmap(con, info);
return 0;
}
/*
* Update the `var' structure (called by fbcon.c)
*/
static int sgivwfbcon_updatevar(int con, struct fb_info *info)
{
/* Nothing */
return 0;
}
/*
* Blank the display.
*/
static void sgivwfbcon_blank(int blank, struct fb_info *info)
{
/* Nothing */
}
#ifdef MODULE
MODULE_LICENSE("GPL");
int init_module(void)
{
return sgivwfb_init();
}
void cleanup_module(void)
{
unregister_framebuffer(&fb_info);
dbe_TurnOffDma();
iounmap(regs);
iounmap(fbmem);
}
#endif /* MODULE */
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