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linux-sg2042/drivers/video/sgivwfb.c

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/*
* 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/module.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/mtrr.h>
#include <asm/visws/sgivw.h>
#define INCLUDE_TIMING_TABLE_DATA
#define DBE_REG_BASE par->regs
#include <video/sgivw.h>
struct sgivw_par {
struct asregs *regs;
u32 cmap_fifo;
u_long timing_num;
};
#define FLATPANEL_SGI_1600SW 5
/*
* 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
*/
static int ypan = 0;
static int ywrap = 0;
static int flatpanel_id = -1;
static struct fb_fix_screeninfo sgivwfb_fix __initdata = {
.id = "SGI Vis WS FB",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_PSEUDOCOLOR,
.mmio_start = DBE_REG_PHYS,
.mmio_len = DBE_REG_SIZE,
.accel = FB_ACCEL_NONE,
.line_length = 640,
};
static struct fb_var_screeninfo sgivwfb_var __initdata = {
/* 640x480, 8 bpp */
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel = 8,
.red = { 0, 8, 0 },
.green = { 0, 8, 0 },
.blue = { 0, 8, 0 },
.height = -1,
.width = -1,
.pixclock = 20000,
.left_margin = 64,
.right_margin = 64,
.upper_margin = 32,
.lower_margin = 32,
.hsync_len = 64,
.vsync_len = 2,
.vmode = FB_VMODE_NONINTERLACED
};
static struct fb_var_screeninfo sgivwfb_var1600sw __initdata = {
/* 1600x1024, 8 bpp */
.xres = 1600,
.yres = 1024,
.xres_virtual = 1600,
.yres_virtual = 1024,
.bits_per_pixel = 8,
.red = { 0, 8, 0 },
.green = { 0, 8, 0 },
.blue = { 0, 8, 0 },
.height = -1,
.width = -1,
.pixclock = 9353,
.left_margin = 20,
.right_margin = 30,
.upper_margin = 37,
.lower_margin = 3,
.hsync_len = 20,
.vsync_len = 3,
.vmode = FB_VMODE_NONINTERLACED
};
/*
* Interface used by the world
*/
int sgivwfb_init(void);
static int sgivwfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
static int sgivwfb_set_par(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 int sgivwfb_mmap(struct fb_info *info,
struct vm_area_struct *vma);
static struct fb_ops sgivwfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = sgivwfb_check_var,
.fb_set_par = sgivwfb_set_par,
.fb_setcolreg = sgivwfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_mmap = sgivwfb_mmap,
};
/*
* Internal routines
*/
static unsigned long bytes_per_pixel(int bpp)
{
switch (bpp) {
case 8:
return 1;
case 16:
return 2;
case 32:
return 4;
default:
printk(KERN_INFO "sgivwfb: unsupported bpp %d\n", bpp);
return 0;
}
}
static unsigned long get_line_length(int xres_virtual, int bpp)
{
return (xres_virtual * bytes_per_pixel(bpp));
}
/*
* 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(struct sgivw_par *par)
{
unsigned int readVal;
int i;
// 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 User Defined Part of the Display. Again if par use it to get
* real video mode.
*/
static int sgivwfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct sgivw_par *par = (struct sgivw_par *)info->par;
struct dbe_timing_info *timing;
u_long line_length;
u_long min_mode;
int req_dot;
int test_mode;
/*
* 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 = info->var.xoffset;
var->yoffset = info->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 */
req_dot = PICOS2KHZ(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 */
info->fix.line_length = line_length;
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 = KHZ2PICOS(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;
/* Ouch. This breaks the rules but timing_num is only important if you
* change a video mode */
par->timing_num = min_mode;
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);
return 0;
}
/*
* Setup flatpanel related registers.
*/
static void sgivwfb_setup_flatpanel(struct sgivw_par *par, struct dbe_timing_info *currentTiming)
{
int fp_wid, fp_hgt, fp_vbs, fp_vbe;
u32 outputVal = 0;
SET_DBE_FIELD(VT_FLAGS, HDRV_INVERT, outputVal,
(currentTiming->flags & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1);
SET_DBE_FIELD(VT_FLAGS, VDRV_INVERT, outputVal,
(currentTiming->flags & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1);
DBE_SETREG(vt_flags, outputVal);
/* Turn on the flat panel */
switch (flatpanel_id) {
case FLATPANEL_SGI_1600SW:
fp_wid = 1600;
fp_hgt = 1024;
fp_vbs = 0;
fp_vbe = 1600;
currentTiming->pll_m = 4;
currentTiming->pll_n = 1;
currentTiming->pll_p = 0;
break;
default:
fp_wid = fp_hgt = fp_vbs = fp_vbe = 0xfff;
}
outputVal = 0;
SET_DBE_FIELD(FP_DE, FP_DE_ON, outputVal, fp_vbs);
SET_DBE_FIELD(FP_DE, FP_DE_OFF, outputVal, fp_vbe);
DBE_SETREG(fp_de, outputVal);
outputVal = 0;
SET_DBE_FIELD(FP_HDRV, FP_HDRV_OFF, outputVal, fp_wid);
DBE_SETREG(fp_hdrv, outputVal);
outputVal = 0;
SET_DBE_FIELD(FP_VDRV, FP_VDRV_ON, outputVal, 1);
SET_DBE_FIELD(FP_VDRV, FP_VDRV_OFF, outputVal, fp_hgt + 1);
DBE_SETREG(fp_vdrv, outputVal);
}
/*
* Set the hardware according to 'par'.
*/
static int sgivwfb_set_par(struct fb_info *info)
{
struct sgivw_par *par = info->par;
int i, j, htmp, temp;
u32 readVal, outputVal;
int wholeTilesX, maxPixelsPerTileX;
int frmWrite1, frmWrite2, frmWrite3b;
struct dbe_timing_info *currentTiming; /* Current Video Timing */
int xpmax, ypmax; // Monitor resolution
int bytesPerPixel; // Bytes per pixel
currentTiming = &dbeVTimings[par->timing_num];
bytesPerPixel = bytes_per_pixel(info->var.bits_per_pixel);
xpmax = currentTiming->width;
ypmax = currentTiming->height;
/* dbe_InitGraphicsBase(); */
/* Turn on dotclock PLL */
DBE_SETREG(ctrlstat, 0x20000000);
dbe_TurnOffDma(par);
/* 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(par);
/* 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);
if (flatpanel_id != -1)
sgivwfb_setup_flatpanel(par, currentTiming);
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
par->regs->crs_ctl = 0;
// XXX What's this section for??
DBE_GETREG(ctrlstat, readVal);
readVal &= 0x02000000;
if (readVal != 0) {
DBE_SETREG(ctrlstat, 0x30000000);
}
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)
{
struct sgivw_par *par = (struct sgivw_par *) info->par;
if (regno > 255)
return 1;
red >>= 8;
green >>= 8;
blue >>= 8;
/* wait for the color map FIFO to have a free entry */
while (par->cmap_fifo == 0)
par->cmap_fifo = par->regs->cm_fifo;
par->regs->cmap[regno] = (red << 24) | (green << 16) | (blue << 8);
par->cmap_fifo--; /* assume FIFO is filling up */
return 0;
}
static int sgivwfb_mmap(struct fb_info *info,
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;
vma->vm_flags |= VM_IO;
if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT,
size, vma->vm_page_prot))
return -EAGAIN;
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;
if (!options || !*options)
return 0;
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!strncmp(this_opt, "monitor:", 8)) {
if (!strncmp(this_opt + 8, "crt", 3))
flatpanel_id = -1;
else if (!strncmp(this_opt + 8, "1600sw", 6))
flatpanel_id = FLATPANEL_SGI_1600SW;
}
}
return 0;
}
/*
* Initialisation
*/
static int __init sgivwfb_probe(struct platform_device *dev)
{
struct sgivw_par *par;
struct fb_info *info;
char *monitor;
info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 16, &dev->dev);
if (!info)
return -ENOMEM;
par = info->par;
if (!request_mem_region(DBE_REG_PHYS, DBE_REG_SIZE, "sgivwfb")) {
printk(KERN_ERR "sgivwfb: couldn't reserve mmio region\n");
framebuffer_release(info);
return -EBUSY;
}
par->regs = (struct asregs *) ioremap_nocache(DBE_REG_PHYS, DBE_REG_SIZE);
if (!par->regs) {
printk(KERN_ERR "sgivwfb: couldn't ioremap registers\n");
goto fail_ioremap_regs;
}
mtrr_add(sgivwfb_mem_phys, sgivwfb_mem_size, MTRR_TYPE_WRCOMB, 1);
sgivwfb_fix.smem_start = sgivwfb_mem_phys;
sgivwfb_fix.smem_len = sgivwfb_mem_size;
sgivwfb_fix.ywrapstep = ywrap;
sgivwfb_fix.ypanstep = ypan;
info->fix = sgivwfb_fix;
switch (flatpanel_id) {
case FLATPANEL_SGI_1600SW:
info->var = sgivwfb_var1600sw;
monitor = "SGI 1600SW flatpanel";
break;
default:
info->var = sgivwfb_var;
monitor = "CRT";
}
printk(KERN_INFO "sgivwfb: %s monitor selected\n", monitor);
info->fbops = &sgivwfb_ops;
info->pseudo_palette = (void *) (par + 1);
info->flags = FBINFO_DEFAULT;
info->screen_base = ioremap_nocache((unsigned long) sgivwfb_mem_phys, sgivwfb_mem_size);
if (!info->screen_base) {
printk(KERN_ERR "sgivwfb: couldn't ioremap screen_base\n");
goto fail_ioremap_fbmem;
}
if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
goto fail_color_map;
if (register_framebuffer(info) < 0) {
printk(KERN_ERR "sgivwfb: couldn't register framebuffer\n");
goto fail_register_framebuffer;
}
platform_set_drvdata(dev, info);
printk(KERN_INFO "fb%d: SGI DBE frame buffer device, using %ldK of video memory at %#lx\n",
info->node, sgivwfb_mem_size >> 10, sgivwfb_mem_phys);
return 0;
fail_register_framebuffer:
fb_dealloc_cmap(&info->cmap);
fail_color_map:
iounmap((char *) info->screen_base);
fail_ioremap_fbmem:
iounmap(par->regs);
fail_ioremap_regs:
release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
framebuffer_release(info);
return -ENXIO;
}
static int sgivwfb_remove(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
if (info) {
struct sgivw_par *par = info->par;
unregister_framebuffer(info);
dbe_TurnOffDma(par);
iounmap(par->regs);
iounmap(info->screen_base);
release_mem_region(DBE_REG_PHYS, DBE_REG_SIZE);
}
return 0;
}
static struct platform_driver sgivwfb_driver = {
.probe = sgivwfb_probe,
.remove = sgivwfb_remove,
.driver = {
.name = "sgivwfb",
},
};
static struct platform_device *sgivwfb_device;
int __init sgivwfb_init(void)
{
int ret;
#ifndef MODULE
char *option = NULL;
if (fb_get_options("sgivwfb", &option))
return -ENODEV;
sgivwfb_setup(option);
#endif
ret = platform_driver_register(&sgivwfb_driver);
if (!ret) {
sgivwfb_device = platform_device_alloc("sgivwfb", 0);
if (sgivwfb_device) {
ret = platform_device_add(sgivwfb_device);
} else
ret = -ENOMEM;
if (ret) {
platform_driver_unregister(&sgivwfb_driver);
platform_device_put(sgivwfb_device);
}
}
return ret;
}
module_init(sgivwfb_init);
#ifdef MODULE
MODULE_LICENSE("GPL");
static void __exit sgivwfb_exit(void)
{
platform_device_unregister(sgivwfb_device);
platform_driver_unregister(&sgivwfb_driver);
}
module_exit(sgivwfb_exit);
#endif /* MODULE */
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