sis_main.c

底层驱动开发

	}

	if(ivideo->currentvbflags & VB_DISPTYPE_CRT1) {

		if( (!ivideo->sisfb_thismonitor.datavalid) ||
		    ((ivideo->sisfb_thismonitor.datavalid) &&
		     (ivideo->sisfb_thismonitor.feature & 0xe0))) {

			if(ivideo->sisvga_engine == SIS_315_VGA) {
				setSISIDXREG(SISCR, ivideo->SiS_Pr.SiS_MyCR63, 0xbf, cr63);
			}

			if(!(sisfb_bridgeisslave(ivideo))) {
				setSISIDXREG(SISSR, 0x01, ~0x20, sr01);
				setSISIDXREG(SISSR, 0x1f, 0x3f, sr1f);
			}
		}

	}

	if(ivideo->currentvbflags & CRT2_LCD) {

		if(ivideo->vbflags2 & VB2_SISLVDSBRIDGE) {
			if(backlight) {
				SiS_SiS30xBLOn(&ivideo->SiS_Pr);
			} else {
				SiS_SiS30xBLOff(&ivideo->SiS_Pr);
			}
		} else if(ivideo->sisvga_engine == SIS_315_VGA) {
#ifdef CONFIG_FB_SIS_315
			if(ivideo->vbflags2 & VB2_CHRONTEL) {
				if(backlight) {
					SiS_Chrontel701xBLOn(&ivideo->SiS_Pr);
				} else {
					SiS_Chrontel701xBLOff(&ivideo->SiS_Pr);
				}
			}
#endif
		}

		if(((ivideo->sisvga_engine == SIS_300_VGA) &&
		    (ivideo->vbflags2 & (VB2_301|VB2_30xBDH|VB2_LVDS))) ||
		   ((ivideo->sisvga_engine == SIS_315_VGA) &&
		    ((ivideo->vbflags2 & (VB2_LVDS | VB2_CHRONTEL)) == VB2_LVDS))) {
			setSISIDXREG(SISSR, 0x11, ~0x0c, sr11);
		}

		if(ivideo->sisvga_engine == SIS_300_VGA) {
			if((ivideo->vbflags2 & VB2_30xB) &&
			   (!(ivideo->vbflags2 & VB2_30xBDH))) {
				setSISIDXREG(SISPART1, 0x13, 0x3f, p1_13);
			}
		} else if(ivideo->sisvga_engine == SIS_315_VGA) {
			if((ivideo->vbflags2 & VB2_30xB) &&
			   (!(ivideo->vbflags2 & VB2_30xBDH))) {
				setSISIDXREG(SISPART2, 0x00, 0x1f, p2_0);
			}
		}

	} else if(ivideo->currentvbflags & CRT2_VGA) {

		if(ivideo->vbflags2 & VB2_30xB) {
			setSISIDXREG(SISPART2, 0x00, 0x1f, p2_0);
		}

	}

	return 0;
}

/* ------------- Callbacks from init.c/init301.c  -------------- */

#ifdef CONFIG_FB_SIS_300
unsigned int
sisfb_read_nbridge_pci_dword(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u32 val = 0;

   pci_read_config_dword(ivideo->nbridge, reg, &val);
   return (unsigned int)val;
}

void
sisfb_write_nbridge_pci_dword(struct SiS_Private *SiS_Pr, int reg, unsigned int val)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;

   pci_write_config_dword(ivideo->nbridge, reg, (u32)val);
}

unsigned int
sisfb_read_lpc_pci_dword(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u32 val = 0;

   if(!ivideo->lpcdev) return 0;

   pci_read_config_dword(ivideo->lpcdev, reg, &val);
   return (unsigned int)val;
}
#endif

#ifdef CONFIG_FB_SIS_315
void
sisfb_write_nbridge_pci_byte(struct SiS_Private *SiS_Pr, int reg, unsigned char val)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;

   pci_write_config_byte(ivideo->nbridge, reg, (u8)val);
}

unsigned int
sisfb_read_mio_pci_word(struct SiS_Private *SiS_Pr, int reg)
{
   struct sis_video_info *ivideo = (struct sis_video_info *)SiS_Pr->ivideo;
   u16 val = 0;

   if(!ivideo->lpcdev) return 0;

   pci_read_config_word(ivideo->lpcdev, reg, &val);
   return (unsigned int)val;
}
#endif

/* ----------- FBDev related routines for all series ----------- */

static int
sisfb_get_cmap_len(const struct fb_var_screeninfo *var)
{
	return (var->bits_per_pixel == 8) ? 256 : 16;
}

static void
sisfb_set_vparms(struct sis_video_info *ivideo)
{
	switch(ivideo->video_bpp) {
	case 8:
		ivideo->DstColor = 0x0000;
		ivideo->SiS310_AccelDepth = 0x00000000;
		ivideo->video_cmap_len = 256;
		break;
	case 16:
		ivideo->DstColor = 0x8000;
		ivideo->SiS310_AccelDepth = 0x00010000;
		ivideo->video_cmap_len = 16;
		break;
	case 32:
		ivideo->DstColor = 0xC000;
		ivideo->SiS310_AccelDepth = 0x00020000;
		ivideo->video_cmap_len = 16;
		break;
	default:
		ivideo->video_cmap_len = 16;
		printk(KERN_ERR "sisfb: Unsupported depth %d", ivideo->video_bpp);
		ivideo->accel = 0;
	}
}

static int
sisfb_calc_maxyres(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	int maxyres = ivideo->sisfb_mem / (var->xres_virtual * (var->bits_per_pixel >> 3));

	if(maxyres > 32767) maxyres = 32767;

	return maxyres;
}

static void
sisfb_calc_pitch(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	ivideo->video_linelength = var->xres_virtual * (var->bits_per_pixel >> 3);
	ivideo->scrnpitchCRT1 = ivideo->video_linelength;
	if(!(ivideo->currentvbflags & CRT1_LCDA)) {
		if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
			ivideo->scrnpitchCRT1 <<= 1;
		}
	}
}

static void
sisfb_set_pitch(struct sis_video_info *ivideo)
{
	BOOLEAN isslavemode = FALSE;
	unsigned short HDisplay1 = ivideo->scrnpitchCRT1 >> 3;
	unsigned short HDisplay2 = ivideo->video_linelength >> 3;

	if(sisfb_bridgeisslave(ivideo)) isslavemode = TRUE;

	/* We need to set pitch for CRT1 if bridge is in slave mode, too */
	if((ivideo->currentvbflags & VB_DISPTYPE_DISP1) || (isslavemode)) {
		outSISIDXREG(SISCR,0x13,(HDisplay1 & 0xFF));
		setSISIDXREG(SISSR,0x0E,0xF0,(HDisplay1 >> 8));
	}

	/* We must not set the pitch for CRT2 if bridge is in slave mode */
	if((ivideo->currentvbflags & VB_DISPTYPE_DISP2) && (!isslavemode)) {
		orSISIDXREG(SISPART1,ivideo->CRT2_write_enable,0x01);
		outSISIDXREG(SISPART1,0x07,(HDisplay2 & 0xFF));
		setSISIDXREG(SISPART1,0x09,0xF0,(HDisplay2 >> 8));
	}
}

static void
sisfb_bpp_to_var(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	ivideo->video_cmap_len = sisfb_get_cmap_len(var);

	switch(var->bits_per_pixel) {
	case 8:
		var->red.offset = var->green.offset = var->blue.offset = 0;
		var->red.length = var->green.length = var->blue.length = 6;
		break;
	case 16:
		var->red.offset = 11;
		var->red.length = 5;
		var->green.offset = 5;
		var->green.length = 6;
		var->blue.offset = 0;
		var->blue.length = 5;
		var->transp.offset = 0;
		var->transp.length = 0;
		break;
	case 32:
		var->red.offset = 16;
		var->red.length = 8;
		var->green.offset = 8;
		var->green.length = 8;
		var->blue.offset = 0;
		var->blue.length = 8;
		var->transp.offset = 24;
		var->transp.length = 8;
		break;
	}
}

static int
sisfb_set_mode(struct sis_video_info *ivideo, int clrscrn)
{
	unsigned short modeno = ivideo->mode_no;

	/* >=2.6.12's fbcon clears the screen anyway */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12)
	if(!clrscrn) modeno |= 0x80;
#else
	modeno |= 0x80;
#endif

	outSISIDXREG(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	sisfb_pre_setmode(ivideo);

	if(SiSSetMode(&ivideo->SiS_Pr, modeno) == 0) {
		printk(KERN_ERR "sisfb: Setting mode[0x%x] failed\n", ivideo->mode_no);
		return -EINVAL;
	}

	outSISIDXREG(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	sisfb_post_setmode(ivideo);

	return 0;
}


static int
sisfb_do_set_var(struct fb_var_screeninfo *var, int isactive, struct fb_info *info)
{
	struct sis_video_info *ivideo = (struct sis_video_info *)info->par;
	unsigned int htotal = 0, vtotal = 0;
	unsigned int drate = 0, hrate = 0;
	int found_mode = 0, ret;
	int old_mode;
	u32 pixclock;

	htotal = var->left_margin + var->xres + var->right_margin + var->hsync_len;

	vtotal = var->upper_margin + var->lower_margin + var->vsync_len;

	pixclock = var->pixclock;

	if((var->vmode & FB_VMODE_MASK) == FB_VMODE_NONINTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE) {
		vtotal += var->yres;
		vtotal <<= 2;
	} else if((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
		vtotal += var->yres;
		vtotal <<= 1;
	} else 	vtotal += var->yres;

	if(!(htotal) || !(vtotal)) {
		DPRINTK("sisfb: Invalid 'var' information\n");
		return -EINVAL;
	}

	if(pixclock && htotal && vtotal) {
		drate = 1000000000 / pixclock;
		hrate = (drate * 1000) / htotal;
		ivideo->refresh_rate = (unsigned int) (hrate * 2 / vtotal);
	} else {
		ivideo->refresh_rate = 60;
	}

	old_mode = ivideo->sisfb_mode_idx;
	ivideo->sisfb_mode_idx = 0;

	while( (sisbios_mode[ivideo->sisfb_mode_idx].mode_no[0] != 0) &&
	       (sisbios_mode[ivideo->sisfb_mode_idx].xres <= var->xres) ) {
		if( (sisbios_mode[ivideo->sisfb_mode_idx].xres == var->xres) &&
		    (sisbios_mode[ivideo->sisfb_mode_idx].yres == var->yres) &&
		    (sisbios_mode[ivideo->sisfb_mode_idx].bpp == var->bits_per_pixel)) {
			ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];
			found_mode = 1;
			break;
		}
		ivideo->sisfb_mode_idx++;
	}

	if(found_mode) {
		ivideo->sisfb_mode_idx = sisfb_validate_mode(ivideo,
				ivideo->sisfb_mode_idx, ivideo->currentvbflags);
		ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];
	} else {
		ivideo->sisfb_mode_idx = -1;
	}

       	if(ivideo->sisfb_mode_idx < 0) {
		printk(KERN_ERR "sisfb: Mode %dx%dx%d not supported\n", var->xres,
		       var->yres, var->bits_per_pixel);
		ivideo->sisfb_mode_idx = old_mode;
		return -EINVAL;
	}

	if(sisfb_search_refresh_rate(ivideo, ivideo->refresh_rate, ivideo->sisfb_mode_idx) == 0) {
		ivideo->rate_idx = sisbios_mode[ivideo->sisfb_mode_idx].rate_idx;
		ivideo->refresh_rate = 60;
	}

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	if(ivideo->sisfb_thismonitor.datavalid) {
		if(!sisfb_verify_rate(ivideo, &ivideo->sisfb_thismonitor, ivideo->sisfb_mode_idx,
	                         ivideo->rate_idx, ivideo->refresh_rate)) {
			printk(KERN_INFO "sisfb: WARNING: Refresh rate exceeds monitor specs!\n");
		}
	}
#endif

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	if(((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive) {
#else
	if(isactive) {
#endif
		/* If acceleration to be used? Need to know
		 * before pre/post_set_mode()
		 */
		ivideo->accel = 0;
#if defined(FBINFO_HWACCEL_DISABLED) && defined(FBINFO_HWACCEL_XPAN)
#ifdef STUPID_ACCELF_TEXT_SHIT
		if(var->accel_flags & FB_ACCELF_TEXT) {
			info->flags &= ~FBINFO_HWACCEL_DISABLED;
		} else {
			info->flags |= FBINFO_HWACCEL_DISABLED;
		}
#endif
		if(!(info->flags & FBINFO_HWACCEL_DISABLED)) ivideo->accel = -1;
#else
		if(var->accel_flags & FB_ACCELF_TEXT) ivideo->accel = -1;
#endif

		if((ret = sisfb_set_mode(ivideo, 1))) {
			return ret;
		}

		ivideo->video_bpp    = sisbios_mode[ivideo->sisfb_mode_idx].bpp;
		ivideo->video_width  = sisbios_mode[ivideo->sisfb_mode_idx].xres;
		ivideo->video_height = sisbios_mode[ivideo->sisfb_mode_idx].yres;

		sisfb_calc_pitch(ivideo, var);
		sisfb_set_pitch(ivideo);

		sisfb_set_vparms(ivideo);

		ivideo->current_width = ivideo->video_width;
		ivideo->current_height = ivideo->video_height;
		ivideo->current_bpp = ivideo->video_bpp;
		ivideo->current_htotal = htotal;
		ivideo->current_vtotal = vtotal;
		ivideo->current_linelength = ivideo->video_linelength;
		ivideo->current_pixclock = var->pixclock;
		ivideo->current_refresh_rate = ivideo->refresh_rate;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)
		ivideo->sisfb_lastrates[ivideo->mode_no] = ivideo->refresh_rate;
#endif
	}

	return 0;
}

static void
sisfb_set_base_CRT1(struct sis_video_info *ivideo, unsigned int base)
{
	outSISIDXREG(SISSR, IND_SIS_PASSWORD, SIS_PASSWORD);

	outSISIDXREG(SISCR, 0x0D, base & 0xFF);
	outSISIDXREG(SISCR, 0x0C, (base >> 8) & 0xFF);
	outSISIDXREG(SISSR, 0x0D, (base >> 16) & 0xFF);
	if(ivideo->sisvga_engine == SIS_315_VGA) {
		setSISIDXREG(SISSR, 0x37, 0xFE, (base >> 24) & 0x01);
	}
}

static void
sisfb_set_base_CRT2(struct sis_video_info *ivideo, unsigned int base)
{
	if(ivideo->currentvbflags & VB_DISPTYPE_DISP2) {
		orSISIDXREG(SISPART1, ivideo->CRT2_write_enable, 0x01);
		outSISIDXREG(SISPART1, 0x06, (base & 0xFF));
		outSISIDXREG(SISPART1, 0x05, ((base >> 8) & 0xFF));
		outSISIDXREG(SISPART1, 0x04, ((base >> 16) & 0xFF));
		if(ivideo->sisvga_engine == SIS_315_VGA) {
			setSISIDXREG(SISPART1, 0x02, 0x7F, ((base >> 24) & 0x01) << 7);
		}
	}
}

static int
sisfb_pan_var(struct sis_video_info *ivideo, struct fb_var_screeninfo *var)
{
	if(var->xoffset > (var->xres_virtual - var->xres)) {
		return -EINVAL;
	}
	if(var->yoffset > (var->yres_virtual - var->yres)) {
		return -EINVAL;
	}

	ivideo->current_base = (var->yoffset * var->xres_virtual) + var->xoffset;

	/* calculate base bpp dep. */
	switch(var->bits_per_pixel) {
	case 32:
		break;
	case 16:
		ivideo->current_base >>= 1;
		break;
	case 8:
	default:
		ivideo->current_base >>= 2;
		break;
	}

	ivideo->current_base += (ivideo->video_offset >> 2);

	sisfb_set_base_CRT1(ivideo, ivideo->current_base);
	sisfb_set_base_CRT2(ivideo, ivideo->current_base);

	return 0;
}

/* ------------ FBDev related routines for 2.4 series ----------- */

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)

#include "sisfb_fbdev_2_4.h"

#endif

/* ------------ FBDev related routines for 2.6 series ----------- */

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0)

static int
sisfb_open(struct fb_info *info, int user)
{
	return 0;
}

static int
sisfb_release(struct fb_info *info, int user)
{
	return 0;
}