diff options
Diffstat (limited to 'drivers/video/sgivwfb.c')
| -rw-r--r-- | drivers/video/sgivwfb.c | 901 |
1 files changed, 901 insertions, 0 deletions
diff --git a/drivers/video/sgivwfb.c b/drivers/video/sgivwfb.c new file mode 100644 index 0000000..8413907 --- /dev/null +++ b/drivers/video/sgivwfb.c @@ -0,0 +1,901 @@ +/* + * 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/mm.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/fb.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <asm/io.h> +#include <asm/mtrr.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 + */ + +/* set by arch/i386/kernel/setup.c */ +extern unsigned long sgivwfb_mem_phys; +extern unsigned long sgivwfb_mem_size; + +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 file *file, + 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_cursor = soft_cursor, + .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 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; + vma->vm_flags |= VM_IO; + if (remap_pfn_range(vma, vma->vm_start, offset >> PAGE_SHIFT, + 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; + + 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 void sgivwfb_release(struct device *device) +{ +} + +static int __init sgivwfb_probe(struct device *device) +{ + struct platform_device *dev = to_platform_device(device); + struct sgivw_par *par; + struct fb_info *info; + char *monitor; + + info = framebuffer_alloc(sizeof(struct sgivw_par) + sizeof(u32) * 256, &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; + } + + dev_set_drvdata(&dev->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 device *device) +{ + struct fb_info *info = dev_get_drvdata(device); + + 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 device_driver sgivwfb_driver = { + .name = "sgivwfb", + .bus = &platform_bus_type, + .probe = sgivwfb_probe, + .remove = sgivwfb_remove, +}; + +static struct platform_device sgivwfb_device = { + .name = "sgivwfb", + .id = 0, + .dev = { + .release = sgivwfb_release, + } +}; + +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 = driver_register(&sgivwfb_driver); + if (!ret) { + ret = platform_device_register(&sgivwfb_device); + if (ret) + driver_unregister(&sgivwfb_driver); + } + return ret; +} + +module_init(sgivwfb_init); + +#ifdef MODULE +MODULE_LICENSE("GPL"); + +static void __exit sgivwfb_exit(void) +{ + platform_device_unregister(&sgivwfb_device); + driver_unregister(&sgivwfb_driver); +} + +module_exit(sgivwfb_exit); + +#endif /* MODULE */ |
