From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/video/fbdev/mbx/mbxfb.c | 1055 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 1055 insertions(+)
 create mode 100644 drivers/video/fbdev/mbx/mbxfb.c

(limited to 'drivers/video/fbdev/mbx/mbxfb.c')

diff --git a/drivers/video/fbdev/mbx/mbxfb.c b/drivers/video/fbdev/mbx/mbxfb.c
new file mode 100644
index 000000000..698df9543
--- /dev/null
+++ b/drivers/video/fbdev/mbx/mbxfb.c
@@ -0,0 +1,1055 @@
+/*
+ *  linux/drivers/video/mbx/mbxfb.c
+ *
+ *  Copyright (C) 2006-2007 8D Technologies inc
+ *  Raphael Assenat <raph@8d.com>
+ *  	- Added video overlay support
+ *  	- Various improvements
+ *
+ *  Copyright (C) 2006 Compulab, Ltd.
+ *  Mike Rapoport <mike@compulab.co.il>
+ *  	- Creation of driver
+ *
+ *   Based on pxafb.c
+ *
+ * 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.
+ *
+ *   Intel 2700G (Marathon) Graphics Accelerator Frame Buffer Driver
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+#include <video/mbxfb.h>
+
+#include "regs.h"
+#include "reg_bits.h"
+
+static void __iomem *virt_base_2700;
+
+#define write_reg(val, reg) do { writel((val), (reg)); } while(0)
+
+/* Without this delay, the graphics appears somehow scaled and
+ * there is a lot of jitter in scanlines. This delay is probably
+ * needed only after setting some specific register(s) somewhere,
+ * not all over the place... */
+#define write_reg_dly(val, reg) do { writel((val), reg); udelay(1000); } while(0)
+
+#define MIN_XRES	16
+#define MIN_YRES	16
+#define MAX_XRES	2048
+#define MAX_YRES	2048
+
+#define MAX_PALETTES	16
+
+/* FIXME: take care of different chip revisions with different sizes
+   of ODFB */
+#define MEMORY_OFFSET	0x60000
+
+struct mbxfb_info {
+	struct device *dev;
+
+	struct resource *fb_res;
+	struct resource *fb_req;
+
+	struct resource *reg_res;
+	struct resource *reg_req;
+
+	void __iomem *fb_virt_addr;
+	unsigned long fb_phys_addr;
+
+	void __iomem *reg_virt_addr;
+	unsigned long reg_phys_addr;
+
+	int (*platform_probe) (struct fb_info * fb);
+	int (*platform_remove) (struct fb_info * fb);
+
+	u32 pseudo_palette[MAX_PALETTES];
+#ifdef CONFIG_FB_MBX_DEBUG
+	void *debugfs_data;
+#endif
+
+};
+
+static struct fb_var_screeninfo mbxfb_default = {
+	.xres = 640,
+	.yres = 480,
+	.xres_virtual = 640,
+	.yres_virtual = 480,
+	.bits_per_pixel = 16,
+	.red = {11, 5, 0},
+	.green = {5, 6, 0},
+	.blue = {0, 5, 0},
+	.activate = FB_ACTIVATE_TEST,
+	.height = -1,
+	.width = -1,
+	.pixclock = 40000,
+	.left_margin = 48,
+	.right_margin = 16,
+	.upper_margin = 33,
+	.lower_margin = 10,
+	.hsync_len = 96,
+	.vsync_len = 2,
+	.vmode = FB_VMODE_NONINTERLACED,
+	.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+};
+
+static struct fb_fix_screeninfo mbxfb_fix = {
+	.id = "MBX",
+	.type = FB_TYPE_PACKED_PIXELS,
+	.visual = FB_VISUAL_TRUECOLOR,
+	.xpanstep = 0,
+	.ypanstep = 0,
+	.ywrapstep = 0,
+	.accel = FB_ACCEL_NONE,
+};
+
+struct pixclock_div {
+	u8 m;
+	u8 n;
+	u8 p;
+};
+
+static unsigned int mbxfb_get_pixclock(unsigned int pixclock_ps,
+				       struct pixclock_div *div)
+{
+	u8 m, n, p;
+	unsigned int err = 0;
+	unsigned int min_err = ~0x0;
+	unsigned int clk;
+	unsigned int best_clk = 0;
+	unsigned int ref_clk = 13000;	/* FIXME: take from platform data */
+	unsigned int pixclock;
+
+	/* convert pixclock to KHz */
+	pixclock = PICOS2KHZ(pixclock_ps);
+
+	/* PLL output freq = (ref_clk * M) / (N * 2^P)
+	 *
+	 * M: 1 to 63
+	 * N: 1 to 7
+	 * P: 0 to 7
+	 */
+
+	/* RAPH: When N==1, the resulting pixel clock appears to
+	 * get divided by 2. Preventing N=1 by starting the following
+	 * loop at 2 prevents this. Is this a bug with my chip
+	 * revision or something I dont understand? */
+	for (m = 1; m < 64; m++) {
+		for (n = 2; n < 8; n++) {
+			for (p = 0; p < 8; p++) {
+				clk = (ref_clk * m) / (n * (1 << p));
+				err = (clk > pixclock) ? (clk - pixclock) :
+					(pixclock - clk);
+				if (err < min_err) {
+					min_err = err;
+					best_clk = clk;
+					div->m = m;
+					div->n = n;
+					div->p = p;
+				}
+			}
+		}
+	}
+	return KHZ2PICOS(best_clk);
+}
+
+static int mbxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			   u_int trans, struct fb_info *info)
+{
+	u32 val, ret = 1;
+
+	if (regno < MAX_PALETTES) {
+		u32 *pal = info->pseudo_palette;
+
+		val = (red & 0xf800) | ((green & 0xfc00) >> 5) |
+			((blue & 0xf800) >> 11);
+		pal[regno] = val;
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static int mbxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct pixclock_div div;
+
+	var->pixclock = mbxfb_get_pixclock(var->pixclock, &div);
+
+	if (var->xres < MIN_XRES)
+		var->xres = MIN_XRES;
+	if (var->yres < MIN_YRES)
+		var->yres = MIN_YRES;
+	if (var->xres > MAX_XRES)
+		return -EINVAL;
+	if (var->yres > MAX_YRES)
+		return -EINVAL;
+	var->xres_virtual = max(var->xres_virtual, var->xres);
+	var->yres_virtual = max(var->yres_virtual, var->yres);
+
+	switch (var->bits_per_pixel) {
+		/* 8 bits-per-pixel is not supported yet */
+	case 8:
+		return -EINVAL;
+	case 16:
+		var->green.length = (var->green.length == 5) ? 5 : 6;
+		var->red.length = 5;
+		var->blue.length = 5;
+		var->transp.length = 6 - var->green.length;
+		var->blue.offset = 0;
+		var->green.offset = 5;
+		var->red.offset = 5 + var->green.length;
+		var->transp.offset = (5 + var->red.offset) & 15;
+		break;
+	case 24:		/* RGB 888   */
+	case 32:		/* RGBA 8888 */
+		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.length = var->bits_per_pixel - 24;
+		var->transp.offset = (var->transp.length) ? 24 : 0;
+		break;
+	}
+	var->red.msb_right = 0;
+	var->green.msb_right = 0;
+	var->blue.msb_right = 0;
+	var->transp.msb_right = 0;
+
+	return 0;
+}
+
+static int mbxfb_set_par(struct fb_info *info)
+{
+	struct fb_var_screeninfo *var = &info->var;
+	struct pixclock_div div;
+	ushort hbps, ht, hfps, has;
+	ushort vbps, vt, vfps, vas;
+	u32 gsctrl = readl(GSCTRL);
+	u32 gsadr = readl(GSADR);
+
+	info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
+
+	/* setup color mode */
+	gsctrl &= ~(FMsk(GSCTRL_GPIXFMT));
+	/* FIXME: add *WORKING* support for 8-bits per color */
+	if (info->var.bits_per_pixel == 8) {
+		return -EINVAL;
+	} else {
+		fb_dealloc_cmap(&info->cmap);
+		gsctrl &= ~GSCTRL_LUT_EN;
+
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		switch (info->var.bits_per_pixel) {
+		case 16:
+			if (info->var.green.length == 5)
+				gsctrl |= GSCTRL_GPIXFMT_ARGB1555;
+			else
+				gsctrl |= GSCTRL_GPIXFMT_RGB565;
+			break;
+		case 24:
+			gsctrl |= GSCTRL_GPIXFMT_RGB888;
+			break;
+		case 32:
+			gsctrl |= GSCTRL_GPIXFMT_ARGB8888;
+			break;
+		}
+	}
+
+	/* setup resolution */
+	gsctrl &= ~(FMsk(GSCTRL_GSWIDTH) | FMsk(GSCTRL_GSHEIGHT));
+	gsctrl |= Gsctrl_Width(info->var.xres) |
+		Gsctrl_Height(info->var.yres);
+	write_reg_dly(gsctrl, GSCTRL);
+
+	gsadr &= ~(FMsk(GSADR_SRCSTRIDE));
+	gsadr |= Gsadr_Srcstride(info->var.xres * info->var.bits_per_pixel /
+				 (8 * 16) - 1);
+	write_reg_dly(gsadr, GSADR);
+
+	/* setup timings */
+	var->pixclock = mbxfb_get_pixclock(info->var.pixclock, &div);
+
+	write_reg_dly((Disp_Pll_M(div.m) | Disp_Pll_N(div.n) |
+		Disp_Pll_P(div.p) | DISP_PLL_EN), DISPPLL);
+
+	hbps = var->hsync_len;
+	has = hbps + var->left_margin;
+	hfps = has + var->xres;
+	ht = hfps + var->right_margin;
+
+	vbps = var->vsync_len;
+	vas = vbps + var->upper_margin;
+	vfps = vas + var->yres;
+	vt = vfps + var->lower_margin;
+
+	write_reg_dly((Dht01_Hbps(hbps) | Dht01_Ht(ht)), DHT01);
+	write_reg_dly((Dht02_Hlbs(has) | Dht02_Has(has)), DHT02);
+	write_reg_dly((Dht03_Hfps(hfps) | Dht03_Hrbs(hfps)), DHT03);
+	write_reg_dly((Dhdet_Hdes(has) | Dhdet_Hdef(hfps)), DHDET);
+
+	write_reg_dly((Dvt01_Vbps(vbps) | Dvt01_Vt(vt)), DVT01);
+	write_reg_dly((Dvt02_Vtbs(vas) | Dvt02_Vas(vas)), DVT02);
+	write_reg_dly((Dvt03_Vfps(vfps) | Dvt03_Vbbs(vfps)), DVT03);
+	write_reg_dly((Dvdet_Vdes(vas) | Dvdet_Vdef(vfps)), DVDET);
+	write_reg_dly((Dvectrl_Vevent(vfps) | Dvectrl_Vfetch(vbps)), DVECTRL);
+
+	write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
+
+	write_reg_dly(DINTRE_VEVENT0_EN, DINTRE);
+
+	return 0;
+}
+
+static int mbxfb_blank(int blank, struct fb_info *info)
+{
+	switch (blank) {
+	case FB_BLANK_POWERDOWN:
+	case FB_BLANK_VSYNC_SUSPEND:
+	case FB_BLANK_HSYNC_SUSPEND:
+	case FB_BLANK_NORMAL:
+		write_reg_dly((readl(DSCTRL) & ~DSCTRL_SYNCGEN_EN), DSCTRL);
+		write_reg_dly((readl(PIXCLK) & ~PIXCLK_EN), PIXCLK);
+		write_reg_dly((readl(VOVRCLK) & ~VOVRCLK_EN), VOVRCLK);
+		break;
+	case FB_BLANK_UNBLANK:
+		write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
+		write_reg_dly((readl(PIXCLK) | PIXCLK_EN), PIXCLK);
+		break;
+	}
+	return 0;
+}
+
+static int mbxfb_setupOverlay(struct mbxfb_overlaySetup *set)
+{
+	u32 vsctrl, vscadr, vsadr;
+	u32 sssize, spoctrl, shctrl;
+	u32 vubase, vvbase;
+	u32 vovrclk;
+
+	if (set->scaled_width==0 || set->scaled_height==0)
+		return -EINVAL;
+
+	/* read registers which have reserved bits
+	 * so we can write them back as-is. */
+	vovrclk = readl(VOVRCLK);
+	vsctrl = readl(VSCTRL);
+	vscadr = readl(VSCADR);
+	vubase = readl(VUBASE);
+	vvbase = readl(VVBASE);
+	shctrl = readl(SHCTRL);
+
+	spoctrl = readl(SPOCTRL);
+	sssize = readl(SSSIZE);
+
+	vsctrl &= ~(	FMsk(VSCTRL_VSWIDTH) |
+					FMsk(VSCTRL_VSHEIGHT) |
+					FMsk(VSCTRL_VPIXFMT) |
+					VSCTRL_GAMMA_EN | VSCTRL_CSC_EN |
+					VSCTRL_COSITED );
+	vsctrl |= Vsctrl_Width(set->width) | Vsctrl_Height(set->height) |
+				VSCTRL_CSC_EN;
+
+	vscadr &= ~(VSCADR_STR_EN | FMsk(VSCADR_VBASE_ADR) );
+	vubase &= ~(VUBASE_UVHALFSTR | FMsk(VUBASE_UBASE_ADR));
+	vvbase &= ~(FMsk(VVBASE_VBASE_ADR));
+
+	switch (set->fmt) {
+	case MBXFB_FMT_YUV16:
+		vsctrl |= VSCTRL_VPIXFMT_YUV12;
+
+		set->Y_stride = ((set->width) + 0xf ) & ~0xf;
+		break;
+	case MBXFB_FMT_YUV12:
+		vsctrl |= VSCTRL_VPIXFMT_YUV12;
+
+		set->Y_stride = ((set->width) + 0xf ) & ~0xf;
+		vubase |= VUBASE_UVHALFSTR;
+
+		break;
+	case MBXFB_FMT_UY0VY1:
+		vsctrl |= VSCTRL_VPIXFMT_UY0VY1;
+		set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
+		break;
+	case MBXFB_FMT_VY0UY1:
+		vsctrl |= VSCTRL_VPIXFMT_VY0UY1;
+		set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
+		break;
+	case MBXFB_FMT_Y0UY1V:
+		vsctrl |= VSCTRL_VPIXFMT_Y0UY1V;
+		set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
+		break;
+	case MBXFB_FMT_Y0VY1U:
+		vsctrl |= VSCTRL_VPIXFMT_Y0VY1U;
+		set->Y_stride = (set->width*2 + 0xf ) & ~0xf;
+			break;
+	default:
+		return -EINVAL;
+	}
+
+	/* VSCTRL has the bits which sets the Video Pixel Format.
+	 * When passing from a packed to planar format,
+	 * if we write VSCTRL first, VVBASE and VUBASE would
+	 * be zero if we would not set them here. (And then,
+	 * the chips hangs and only a reset seems to fix it).
+	 *
+	 * If course, the values calculated here have no meaning
+	 * for packed formats.
+	 */
+	set->UV_stride = ((set->width/2) + 0x7 ) & ~0x7;
+		set->U_offset = set->height * set->Y_stride;
+		set->V_offset = set->U_offset +
+						set->height * set->UV_stride;
+	vubase |= Vubase_Ubase_Adr(
+			(0x60000 + set->mem_offset + set->U_offset)>>3);
+	vvbase |= Vvbase_Vbase_Adr(
+			(0x60000 + set->mem_offset + set->V_offset)>>3);
+
+
+	vscadr |= Vscadr_Vbase_Adr((0x60000 + set->mem_offset)>>4);
+
+	if (set->enable)
+		vscadr |= VSCADR_STR_EN;
+
+
+	vsadr = Vsadr_Srcstride((set->Y_stride)/16-1) |
+		Vsadr_Xstart(set->x) | Vsadr_Ystart(set->y);
+
+	sssize &= ~(FMsk(SSSIZE_SC_WIDTH) | FMsk(SSSIZE_SC_HEIGHT));
+	sssize = Sssize_Sc_Width(set->scaled_width-1) |
+			Sssize_Sc_Height(set->scaled_height-1);
+
+	spoctrl &= ~(SPOCTRL_H_SC_BP | SPOCTRL_V_SC_BP |
+			SPOCTRL_HV_SC_OR | SPOCTRL_VS_UR_C |
+			FMsk(SPOCTRL_VPITCH));
+	spoctrl |= Spoctrl_Vpitch((set->height<<11)/set->scaled_height);
+
+	/* Bypass horiz/vert scaler when same size */
+	if (set->scaled_width == set->width)
+		spoctrl |= SPOCTRL_H_SC_BP;
+	if (set->scaled_height == set->height)
+		spoctrl |= SPOCTRL_V_SC_BP;
+
+	shctrl &= ~(FMsk(SHCTRL_HPITCH) | SHCTRL_HDECIM);
+	shctrl |= Shctrl_Hpitch((set->width<<11)/set->scaled_width);
+
+	/* Video plane registers */
+	write_reg(vsctrl, VSCTRL);
+	write_reg(vscadr, VSCADR);
+	write_reg(vubase, VUBASE);
+	write_reg(vvbase, VVBASE);
+	write_reg(vsadr, VSADR);
+
+	/* Video scaler registers */
+	write_reg(sssize, SSSIZE);
+	write_reg(spoctrl, SPOCTRL);
+	write_reg(shctrl, SHCTRL);
+
+	/* Clock */
+	if (set->enable)
+		vovrclk |= 1;
+	else
+		vovrclk &= ~1;
+
+	write_reg(vovrclk, VOVRCLK);
+
+	return 0;
+}
+
+static int mbxfb_ioctl_planeorder(struct mbxfb_planeorder *porder)
+{
+	unsigned long gscadr, vscadr;
+
+	if (porder->bottom == porder->top)
+		return -EINVAL;
+
+	gscadr = readl(GSCADR);
+	vscadr = readl(VSCADR);
+
+	gscadr &= ~(FMsk(GSCADR_BLEND_POS));
+	vscadr &= ~(FMsk(VSCADR_BLEND_POS));
+
+	switch (porder->bottom) {
+	case MBXFB_PLANE_GRAPHICS:
+		gscadr |= GSCADR_BLEND_GFX;
+		break;
+	case MBXFB_PLANE_VIDEO:
+		vscadr |= VSCADR_BLEND_GFX;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (porder->top) {
+	case MBXFB_PLANE_GRAPHICS:
+		gscadr |= GSCADR_BLEND_VID;
+		break;
+	case MBXFB_PLANE_VIDEO:
+		vscadr |= GSCADR_BLEND_VID;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	write_reg_dly(vscadr, VSCADR);
+	write_reg_dly(gscadr, GSCADR);
+
+	return 0;
+
+}
+
+static int mbxfb_ioctl_alphactl(struct mbxfb_alphaCtl *alpha)
+{
+	unsigned long vscadr, vbbase, vcmsk;
+	unsigned long gscadr, gbbase, gdrctrl;
+
+	vbbase = Vbbase_Glalpha(alpha->overlay_global_alpha) |
+				Vbbase_Colkey(alpha->overlay_colorkey);
+
+	gbbase = Gbbase_Glalpha(alpha->graphics_global_alpha) |
+				Gbbase_Colkey(alpha->graphics_colorkey);
+
+	vcmsk = readl(VCMSK);
+	vcmsk &= ~(FMsk(VCMSK_COLKEY_M));
+	vcmsk |= Vcmsk_colkey_m(alpha->overlay_colorkey_mask);
+
+	gdrctrl = readl(GDRCTRL);
+	gdrctrl &= ~(FMsk(GDRCTRL_COLKEYM));
+	gdrctrl |= Gdrctrl_Colkeym(alpha->graphics_colorkey_mask);
+
+	vscadr = readl(VSCADR);
+	vscadr &= ~(FMsk(VSCADR_BLEND_M) | VSCADR_COLKEYSRC | VSCADR_COLKEY_EN);
+
+	gscadr = readl(GSCADR);
+	gscadr &= ~(FMsk(GSCADR_BLEND_M) | GSCADR_COLKEY_EN | GSCADR_COLKEYSRC);
+
+	switch (alpha->overlay_colorkey_mode) {
+	case MBXFB_COLORKEY_DISABLED:
+		break;
+	case MBXFB_COLORKEY_PREVIOUS:
+		vscadr |= VSCADR_COLKEY_EN;
+		break;
+	case MBXFB_COLORKEY_CURRENT:
+		vscadr |= VSCADR_COLKEY_EN | VSCADR_COLKEYSRC;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (alpha->overlay_blend_mode) {
+	case MBXFB_ALPHABLEND_NONE:
+		vscadr |= VSCADR_BLEND_NONE;
+		break;
+	case MBXFB_ALPHABLEND_GLOBAL:
+		vscadr |= VSCADR_BLEND_GLOB;
+		break;
+	case MBXFB_ALPHABLEND_PIXEL:
+		vscadr |= VSCADR_BLEND_PIX;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (alpha->graphics_colorkey_mode) {
+	case MBXFB_COLORKEY_DISABLED:
+		break;
+	case MBXFB_COLORKEY_PREVIOUS:
+		gscadr |= GSCADR_COLKEY_EN;
+		break;
+	case MBXFB_COLORKEY_CURRENT:
+		gscadr |= GSCADR_COLKEY_EN | GSCADR_COLKEYSRC;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (alpha->graphics_blend_mode) {
+	case MBXFB_ALPHABLEND_NONE:
+		gscadr |= GSCADR_BLEND_NONE;
+		break;
+	case MBXFB_ALPHABLEND_GLOBAL:
+		gscadr |= GSCADR_BLEND_GLOB;
+		break;
+	case MBXFB_ALPHABLEND_PIXEL:
+		gscadr |= GSCADR_BLEND_PIX;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	write_reg_dly(vbbase, VBBASE);
+	write_reg_dly(gbbase, GBBASE);
+	write_reg_dly(vcmsk, VCMSK);
+	write_reg_dly(gdrctrl, GDRCTRL);
+	write_reg_dly(gscadr, GSCADR);
+	write_reg_dly(vscadr, VSCADR);
+
+	return 0;
+}
+
+static int mbxfb_ioctl(struct fb_info *info, unsigned int cmd,
+				unsigned long arg)
+{
+	struct mbxfb_overlaySetup	setup;
+	struct mbxfb_planeorder 	porder;
+	struct mbxfb_alphaCtl 		alpha;
+	struct mbxfb_reg			reg;
+	int res;
+	__u32 tmp;
+
+	switch (cmd)
+	{
+		case MBXFB_IOCX_OVERLAY:
+			if (copy_from_user(&setup, (void __user*)arg,
+						sizeof(struct mbxfb_overlaySetup)))
+				return -EFAULT;
+
+			res = mbxfb_setupOverlay(&setup);
+			if (res)
+				return res;
+
+			if (copy_to_user((void __user*)arg, &setup,
+						sizeof(struct mbxfb_overlaySetup)))
+				return -EFAULT;
+
+			return 0;
+
+		case MBXFB_IOCS_PLANEORDER:
+			if (copy_from_user(&porder, (void __user*)arg,
+					sizeof(struct mbxfb_planeorder)))
+				return -EFAULT;
+
+			return mbxfb_ioctl_planeorder(&porder);
+
+		case MBXFB_IOCS_ALPHA:
+			if (copy_from_user(&alpha, (void __user*)arg,
+					sizeof(struct mbxfb_alphaCtl)))
+				return -EFAULT;
+
+			return mbxfb_ioctl_alphactl(&alpha);
+
+		case MBXFB_IOCS_REG:
+			if (copy_from_user(&reg, (void __user*)arg,
+						sizeof(struct mbxfb_reg)))
+				return -EFAULT;
+
+			if (reg.addr >= 0x10000) /* regs are from 0x3fe0000 to 0x3feffff */
+				return -EINVAL;
+
+			tmp = readl(virt_base_2700 + reg.addr);
+			tmp &= ~reg.mask;
+			tmp |= reg.val & reg.mask;
+			writel(tmp, virt_base_2700 + reg.addr);
+
+			return 0;
+		case MBXFB_IOCX_REG:
+			if (copy_from_user(&reg, (void __user*)arg,
+						sizeof(struct mbxfb_reg)))
+				return -EFAULT;
+
+			if (reg.addr >= 0x10000)	/* regs are from 0x3fe0000 to 0x3feffff */
+				return -EINVAL;
+			reg.val = readl(virt_base_2700 + reg.addr);
+
+			if (copy_to_user((void __user*)arg, &reg,
+						sizeof(struct mbxfb_reg)))
+				return -EFAULT;
+
+			return 0;
+	}
+	return -EINVAL;
+}
+
+static struct fb_ops mbxfb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var = mbxfb_check_var,
+	.fb_set_par = mbxfb_set_par,
+	.fb_setcolreg = mbxfb_setcolreg,
+	.fb_fillrect = cfb_fillrect,
+	.fb_copyarea = cfb_copyarea,
+	.fb_imageblit = cfb_imageblit,
+	.fb_blank = mbxfb_blank,
+	.fb_ioctl = mbxfb_ioctl,
+};
+
+/*
+  Enable external SDRAM controller. Assume that all clocks are active
+  by now.
+*/
+static void setup_memc(struct fb_info *fbi)
+{
+	unsigned long tmp;
+	int i;
+
+	/* FIXME: use platform specific parameters */
+	/* setup SDRAM controller */
+	write_reg_dly((LMCFG_LMC_DS | LMCFG_LMC_TS | LMCFG_LMD_TS |
+		LMCFG_LMA_TS),
+	       LMCFG);
+
+	write_reg_dly(LMPWR_MC_PWR_ACT, LMPWR);
+
+	/* setup SDRAM timings */
+	write_reg_dly((Lmtim_Tras(7) | Lmtim_Trp(3) | Lmtim_Trcd(3) |
+		Lmtim_Trc(9) | Lmtim_Tdpl(2)),
+	       LMTIM);
+	/* setup SDRAM refresh rate */
+	write_reg_dly(0xc2b, LMREFRESH);
+	/* setup SDRAM type parameters */
+	write_reg_dly((LMTYPE_CASLAT_3 | LMTYPE_BKSZ_2 | LMTYPE_ROWSZ_11 |
+		LMTYPE_COLSZ_8),
+	       LMTYPE);
+	/* enable memory controller */
+	write_reg_dly(LMPWR_MC_PWR_ACT, LMPWR);
+	/* perform dummy reads */
+	for ( i = 0; i < 16; i++ ) {
+		tmp = readl(fbi->screen_base);
+	}
+}
+
+static void enable_clocks(struct fb_info *fbi)
+{
+	/* enable clocks */
+	write_reg_dly(SYSCLKSRC_PLL_2, SYSCLKSRC);
+	write_reg_dly(PIXCLKSRC_PLL_1, PIXCLKSRC);
+	write_reg_dly(0x00000000, CLKSLEEP);
+
+	/* PLL output = (Frefclk * M) / (N * 2^P )
+	 *
+	 * M: 0x17, N: 0x3, P: 0x0 == 100 Mhz!
+	 * M: 0xb, N: 0x1, P: 0x1 == 71 Mhz
+	 * */
+	write_reg_dly((Core_Pll_M(0xb) | Core_Pll_N(0x1) | Core_Pll_P(0x1) |
+		CORE_PLL_EN),
+	       COREPLL);
+
+	write_reg_dly((Disp_Pll_M(0x1b) | Disp_Pll_N(0x7) | Disp_Pll_P(0x1) |
+		DISP_PLL_EN),
+	       DISPPLL);
+
+	write_reg_dly(0x00000000, VOVRCLK);
+	write_reg_dly(PIXCLK_EN, PIXCLK);
+	write_reg_dly(MEMCLK_EN, MEMCLK);
+	write_reg_dly(0x00000001, M24CLK);
+	write_reg_dly(0x00000001, MBXCLK);
+	write_reg_dly(SDCLK_EN, SDCLK);
+	write_reg_dly(0x00000001, PIXCLKDIV);
+}
+
+static void setup_graphics(struct fb_info *fbi)
+{
+	unsigned long gsctrl;
+	unsigned long vscadr;
+
+	gsctrl = GSCTRL_GAMMA_EN | Gsctrl_Width(fbi->var.xres) |
+		Gsctrl_Height(fbi->var.yres);
+	switch (fbi->var.bits_per_pixel) {
+	case 16:
+		if (fbi->var.green.length == 5)
+			gsctrl |= GSCTRL_GPIXFMT_ARGB1555;
+		else
+			gsctrl |= GSCTRL_GPIXFMT_RGB565;
+		break;
+	case 24:
+		gsctrl |= GSCTRL_GPIXFMT_RGB888;
+		break;
+	case 32:
+		gsctrl |= GSCTRL_GPIXFMT_ARGB8888;
+		break;
+	}
+
+	write_reg_dly(gsctrl, GSCTRL);
+	write_reg_dly(0x00000000, GBBASE);
+	write_reg_dly(0x00ffffff, GDRCTRL);
+	write_reg_dly((GSCADR_STR_EN | Gscadr_Gbase_Adr(0x6000)), GSCADR);
+	write_reg_dly(0x00000000, GPLUT);
+
+	vscadr = readl(VSCADR);
+	vscadr &= ~(FMsk(VSCADR_BLEND_POS) | FMsk(VSCADR_BLEND_M));
+	vscadr |= VSCADR_BLEND_VID | VSCADR_BLEND_NONE;
+	write_reg_dly(vscadr, VSCADR);
+}
+
+static void setup_display(struct fb_info *fbi)
+{
+	unsigned long dsctrl = 0;
+
+	dsctrl = DSCTRL_BLNK_POL;
+	if (fbi->var.sync & FB_SYNC_HOR_HIGH_ACT)
+		dsctrl |= DSCTRL_HS_POL;
+	if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT)
+		dsctrl |= DSCTRL_VS_POL;
+	write_reg_dly(dsctrl, DSCTRL);
+	write_reg_dly(0xd0303010, DMCTRL);
+	write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
+}
+
+static void enable_controller(struct fb_info *fbi)
+{
+	u32 svctrl, shctrl;
+
+	write_reg_dly(SYSRST_RST, SYSRST);
+
+	/* setup a timeout, raise drive strength */
+	write_reg_dly(0xffffff0c, SYSCFG);
+
+	enable_clocks(fbi);
+	setup_memc(fbi);
+	setup_graphics(fbi);
+	setup_display(fbi);
+
+	shctrl = readl(SHCTRL);
+	shctrl &= ~(FMsk(SHCTRL_HINITIAL));
+	shctrl |= Shctrl_Hinitial(4<<11);
+	writel(shctrl, SHCTRL);
+
+	svctrl = Svctrl_Initial1(1<<10) | Svctrl_Initial2(1<<10);
+	writel(svctrl, SVCTRL);
+
+	writel(SPOCTRL_H_SC_BP | SPOCTRL_V_SC_BP | SPOCTRL_VORDER_4TAP
+			, SPOCTRL);
+
+	/* Those coefficients are good for scaling up. For scaling
+	 * down, the application has to calculate them. */
+	write_reg(0xff000100, VSCOEFF0);
+	write_reg(0xfdfcfdfe, VSCOEFF1);
+	write_reg(0x170d0500, VSCOEFF2);
+	write_reg(0x3d372d22, VSCOEFF3);
+	write_reg(0x00000040, VSCOEFF4);
+
+	write_reg(0xff010100, HSCOEFF0);
+	write_reg(0x00000000, HSCOEFF1);
+	write_reg(0x02010000, HSCOEFF2);
+	write_reg(0x01020302, HSCOEFF3);
+	write_reg(0xf9fbfe00, HSCOEFF4);
+	write_reg(0xfbf7f6f7, HSCOEFF5);
+	write_reg(0x1c110700, HSCOEFF6);
+	write_reg(0x3e393127, HSCOEFF7);
+	write_reg(0x00000040, HSCOEFF8);
+
+}
+
+#ifdef CONFIG_PM
+/*
+ * Power management hooks.  Note that we won't be called from IRQ context,
+ * unlike the blank functions above, so we may sleep.
+ */
+static int mbxfb_suspend(struct platform_device *dev, pm_message_t state)
+{
+	/* make frame buffer memory enter self-refresh mode */
+	write_reg_dly(LMPWR_MC_PWR_SRM, LMPWR);
+	while (readl(LMPWRSTAT) != LMPWRSTAT_MC_PWR_SRM)
+		; /* empty statement */
+
+	/* reset the device, since it's initial state is 'mostly sleeping' */
+	write_reg_dly(SYSRST_RST, SYSRST);
+	return 0;
+}
+
+static int mbxfb_resume(struct platform_device *dev)
+{
+	struct fb_info *fbi = platform_get_drvdata(dev);
+
+	enable_clocks(fbi);
+/* 	setup_graphics(fbi); */
+/* 	setup_display(fbi); */
+
+	write_reg_dly((readl(DSCTRL) | DSCTRL_SYNCGEN_EN), DSCTRL);
+	return 0;
+}
+#else
+#define mbxfb_suspend	NULL
+#define mbxfb_resume	NULL
+#endif
+
+/* debugfs entries */
+#ifndef CONFIG_FB_MBX_DEBUG
+#define mbxfb_debugfs_init(x)	do {} while(0)
+#define mbxfb_debugfs_remove(x)	do {} while(0)
+#else
+#include "mbxdebugfs.c"
+#endif
+
+#define res_size(_r) (((_r)->end - (_r)->start) + 1)
+
+static int mbxfb_probe(struct platform_device *dev)
+{
+	int ret;
+	struct fb_info *fbi;
+	struct mbxfb_info *mfbi;
+	struct mbxfb_platform_data *pdata;
+
+	dev_dbg(&dev->dev, "mbxfb_probe\n");
+
+	pdata = dev_get_platdata(&dev->dev);
+	if (!pdata) {
+		dev_err(&dev->dev, "platform data is required\n");
+		return -EINVAL;
+	}
+
+	fbi = framebuffer_alloc(sizeof(struct mbxfb_info), &dev->dev);
+	if (fbi == NULL) {
+		dev_err(&dev->dev, "framebuffer_alloc failed\n");
+		return -ENOMEM;
+	}
+
+	mfbi = fbi->par;
+	fbi->pseudo_palette = mfbi->pseudo_palette;
+
+
+	if (pdata->probe)
+		mfbi->platform_probe = pdata->probe;
+	if (pdata->remove)
+		mfbi->platform_remove = pdata->remove;
+
+	mfbi->fb_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+	mfbi->reg_res = platform_get_resource(dev, IORESOURCE_MEM, 1);
+
+	if (!mfbi->fb_res || !mfbi->reg_res) {
+		dev_err(&dev->dev, "no resources found\n");
+		ret = -ENODEV;
+		goto err1;
+	}
+
+	mfbi->fb_req = request_mem_region(mfbi->fb_res->start,
+					  res_size(mfbi->fb_res), dev->name);
+	if (mfbi->fb_req == NULL) {
+		dev_err(&dev->dev, "failed to claim framebuffer memory\n");
+		ret = -EINVAL;
+		goto err1;
+	}
+	mfbi->fb_phys_addr = mfbi->fb_res->start;
+
+	mfbi->reg_req = request_mem_region(mfbi->reg_res->start,
+					   res_size(mfbi->reg_res), dev->name);
+	if (mfbi->reg_req == NULL) {
+		dev_err(&dev->dev, "failed to claim Marathon registers\n");
+		ret = -EINVAL;
+		goto err2;
+	}
+	mfbi->reg_phys_addr = mfbi->reg_res->start;
+
+	mfbi->reg_virt_addr = devm_ioremap_nocache(&dev->dev,
+						   mfbi->reg_phys_addr,
+						   res_size(mfbi->reg_req));
+	if (!mfbi->reg_virt_addr) {
+		dev_err(&dev->dev, "failed to ioremap Marathon registers\n");
+		ret = -EINVAL;
+		goto err3;
+	}
+	virt_base_2700 = mfbi->reg_virt_addr;
+
+	mfbi->fb_virt_addr = devm_ioremap_nocache(&dev->dev, mfbi->fb_phys_addr,
+						  res_size(mfbi->fb_req));
+	if (!mfbi->fb_virt_addr) {
+		dev_err(&dev->dev, "failed to ioremap frame buffer\n");
+		ret = -EINVAL;
+		goto err3;
+	}
+
+	fbi->screen_base = (char __iomem *)(mfbi->fb_virt_addr + 0x60000);
+	fbi->screen_size = pdata->memsize;
+	fbi->fbops = &mbxfb_ops;
+
+	fbi->var = mbxfb_default;
+	fbi->fix = mbxfb_fix;
+	fbi->fix.smem_start = mfbi->fb_phys_addr + 0x60000;
+	fbi->fix.smem_len = pdata->memsize;
+	fbi->fix.line_length = mbxfb_default.xres_virtual *
+					mbxfb_default.bits_per_pixel / 8;
+
+	ret = fb_alloc_cmap(&fbi->cmap, 256, 0);
+	if (ret < 0) {
+		dev_err(&dev->dev, "fb_alloc_cmap failed\n");
+		ret = -EINVAL;
+		goto err3;
+	}
+
+	platform_set_drvdata(dev, fbi);
+
+	fb_info(fbi, "mbx frame buffer device\n");
+
+	if (mfbi->platform_probe)
+		mfbi->platform_probe(fbi);
+
+	enable_controller(fbi);
+
+	mbxfb_debugfs_init(fbi);
+
+	ret = register_framebuffer(fbi);
+	if (ret < 0) {
+		dev_err(&dev->dev, "register_framebuffer failed\n");
+		ret = -EINVAL;
+		goto err6;
+	}
+
+	return 0;
+
+err6:
+	fb_dealloc_cmap(&fbi->cmap);
+err3:
+	release_mem_region(mfbi->reg_res->start, res_size(mfbi->reg_res));
+err2:
+	release_mem_region(mfbi->fb_res->start, res_size(mfbi->fb_res));
+err1:
+	framebuffer_release(fbi);
+
+	return ret;
+}
+
+static int mbxfb_remove(struct platform_device *dev)
+{
+	struct fb_info *fbi = platform_get_drvdata(dev);
+
+	write_reg_dly(SYSRST_RST, SYSRST);
+
+	mbxfb_debugfs_remove(fbi);
+
+	if (fbi) {
+		struct mbxfb_info *mfbi = fbi->par;
+
+		unregister_framebuffer(fbi);
+		if (mfbi) {
+			if (mfbi->platform_remove)
+				mfbi->platform_remove(fbi);
+
+
+			if (mfbi->reg_req)
+				release_mem_region(mfbi->reg_req->start,
+						   res_size(mfbi->reg_req));
+			if (mfbi->fb_req)
+				release_mem_region(mfbi->fb_req->start,
+						   res_size(mfbi->fb_req));
+		}
+		framebuffer_release(fbi);
+	}
+
+	return 0;
+}
+
+static struct platform_driver mbxfb_driver = {
+	.probe = mbxfb_probe,
+	.remove = mbxfb_remove,
+	.suspend = mbxfb_suspend,
+	.resume = mbxfb_resume,
+	.driver = {
+		.name = "mbx-fb",
+	},
+};
+
+module_platform_driver(mbxfb_driver);
+
+MODULE_DESCRIPTION("loadable framebuffer driver for Marathon device");
+MODULE_AUTHOR("Mike Rapoport, Compulab");
+MODULE_LICENSE("GPL");
-- 
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