sgivwfb.c
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上传日期:2013-04-10
资源大小:33168k
文件大小:27k
- /*
- * 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=%dn", 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=%dn",
- 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 KHzn", 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=%dn",
- var->xres, var->yres, var->bits_per_pixel);
- printk(KERN_INFO " vxres=%d vyres=%dn",
- 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] = ' ';
- 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 %ldkn",
- 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 registersn");
- 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 fbmemn");
- 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 framebuffern");
- goto fail_register_framebuffer;
- }
- printk(KERN_INFO "fb%d: Virtual frame buffer device, using %ldK of video memoryn",
- 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 */