Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1191 insertions, 0 deletions

diff --git a/drivers/staging/sm750fb/sm750.c b/drivers/staging/sm750fb/sm750.c
new file mode 100644
index 0000000000..79bcd5bd49
--- /dev/null
+++ b/drivers/staging/sm750fb/sm750.c
@@ -0,0 +1,1191 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/aperture.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/fb.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/mm_types.h>
+#include <linux/vmalloc.h>
+#include <linux/pagemap.h>
+#include <linux/console.h>
+
+#include "sm750.h"
+#include "sm750_accel.h"
+#include "sm750_cursor.h"
+
+/*
+ * #ifdef __BIG_ENDIAN
+ * ssize_t lynxfb_ops_write(struct fb_info *info, const char __user *buf,
+ * size_t count, loff_t *ppos);
+ * ssize_t lynxfb_ops_read(struct fb_info *info, char __user *buf,
+ * size_t count, loff_t *ppos);
+ * #endif
+ */
+
+/* common var for all device */
+static int g_hwcursor = 1;
+static int g_noaccel;
+static int g_nomtrr;
+static const char *g_fbmode[] = {NULL, NULL};
+static const char *g_def_fbmode = "1024x768-32@60";
+static char *g_settings;
+static int g_dualview;
+static char *g_option;
+
+static const struct fb_videomode lynx750_ext[] = {
+	/*	1024x600-60 VESA	[1.71:1] */
+	{NULL,  60, 1024, 600, 20423, 144,  40, 18, 1, 104, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1024x600-70 VESA */
+	{NULL,  70, 1024, 600, 17211, 152,  48, 21, 1, 104, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1024x600-75 VESA */
+	{NULL,  75, 1024, 600, 15822, 160,  56, 23, 1, 104, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1024x600-85 VESA */
+	{NULL,  85, 1024, 600, 13730, 168,  56, 26, 1, 112, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	720x480	*/
+	{NULL, 60,  720,  480,  37427, 88,   16, 13, 1,   72,  3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1280x720		[1.78:1]	*/
+	{NULL, 60,  1280,  720,  13426, 162, 86, 22, 1,  136, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1280x768@60 */
+	{NULL, 60, 1280, 768, 12579, 192, 64, 20, 3, 128, 7,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1360 x 768	[1.77083:1]	*/
+	{NULL,  60, 1360, 768, 11804, 208,  64, 23, 1, 144, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1368 x 768      [1.78:1]	*/
+	{NULL, 60,  1368,  768,  11647, 216, 72, 23, 1,  144, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1440 x 900		[16:10]	*/
+	{NULL, 60, 1440, 900, 9392, 232, 80, 28, 1, 152, 3,
+	 FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1440x960		[15:10]	*/
+	{NULL, 60, 1440, 960, 8733, 240, 88, 30, 1, 152, 3,
+	 FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+
+	/*	1920x1080	[16:9]	*/
+	{NULL, 60, 1920, 1080, 6734, 148, 88, 41, 1, 44, 3,
+	 FB_SYNC_VERT_HIGH_ACT,
+	 FB_VMODE_NONINTERLACED},
+};
+
+/* no hardware cursor supported under version 2.6.10, kernel bug */
+static int lynxfb_ops_cursor(struct fb_info *info, struct fb_cursor *fbcursor)
+{
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+	struct lynx_cursor *cursor;
+
+	par = info->par;
+	crtc = &par->crtc;
+	cursor = &crtc->cursor;
+
+	if (fbcursor->image.width > cursor->max_w ||
+	    fbcursor->image.height > cursor->max_h ||
+	    fbcursor->image.depth > 1) {
+		return -ENXIO;
+	}
+
+	sm750_hw_cursor_disable(cursor);
+	if (fbcursor->set & FB_CUR_SETSIZE)
+		sm750_hw_cursor_setSize(cursor,
+					fbcursor->image.width,
+					fbcursor->image.height);
+
+	if (fbcursor->set & FB_CUR_SETPOS)
+		sm750_hw_cursor_setPos(cursor,
+				       fbcursor->image.dx - info->var.xoffset,
+				       fbcursor->image.dy - info->var.yoffset);
+
+	if (fbcursor->set & FB_CUR_SETCMAP) {
+		/* get the 16bit color of kernel means */
+		u16 fg, bg;
+
+		fg = ((info->cmap.red[fbcursor->image.fg_color] & 0xf800)) |
+		     ((info->cmap.green[fbcursor->image.fg_color] & 0xfc00) >> 5) |
+		     ((info->cmap.blue[fbcursor->image.fg_color] & 0xf800) >> 11);
+
+		bg = ((info->cmap.red[fbcursor->image.bg_color] & 0xf800)) |
+		     ((info->cmap.green[fbcursor->image.bg_color] & 0xfc00) >> 5) |
+		     ((info->cmap.blue[fbcursor->image.bg_color] & 0xf800) >> 11);
+
+		sm750_hw_cursor_setColor(cursor, fg, bg);
+	}
+
+	if (fbcursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
+		sm750_hw_cursor_setData(cursor,
+					fbcursor->rop,
+					fbcursor->image.data,
+					fbcursor->mask);
+	}
+
+	if (fbcursor->enable)
+		sm750_hw_cursor_enable(cursor);
+
+	return 0;
+}
+
+static void lynxfb_ops_fillrect(struct fb_info *info,
+				const struct fb_fillrect *region)
+{
+	struct lynxfb_par *par;
+	struct sm750_dev *sm750_dev;
+	unsigned int base, pitch, Bpp, rop;
+	u32 color;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+
+	par = info->par;
+	sm750_dev = par->dev;
+
+	/*
+	 * each time 2d function begin to work,below three variable always need
+	 * be set, seems we can put them together in some place
+	 */
+	base = par->crtc.o_screen;
+	pitch = info->fix.line_length;
+	Bpp = info->var.bits_per_pixel >> 3;
+
+	color = (Bpp == 1) ? region->color :
+		((u32 *)info->pseudo_palette)[region->color];
+	rop = (region->rop != ROP_COPY) ? HW_ROP2_XOR : HW_ROP2_COPY;
+
+	/*
+	 * If not use spin_lock, system will die if user load driver
+	 * and immediately unload driver frequently (dual)
+	 * since they fb_count could change during the lifetime of
+	 * this lock, we are holding it for all cases.
+	 */
+	spin_lock(&sm750_dev->slock);
+
+	sm750_dev->accel.de_fillrect(&sm750_dev->accel,
+				     base, pitch, Bpp,
+				     region->dx, region->dy,
+				     region->width, region->height,
+				     color, rop);
+	spin_unlock(&sm750_dev->slock);
+}
+
+static void lynxfb_ops_copyarea(struct fb_info *info,
+				const struct fb_copyarea *region)
+{
+	struct lynxfb_par *par;
+	struct sm750_dev *sm750_dev;
+	unsigned int base, pitch, Bpp;
+
+	par = info->par;
+	sm750_dev = par->dev;
+
+	/*
+	 * each time 2d function begin to work,below three variable always need
+	 * be set, seems we can put them together in some place
+	 */
+	base = par->crtc.o_screen;
+	pitch = info->fix.line_length;
+	Bpp = info->var.bits_per_pixel >> 3;
+
+	/*
+	 * If not use spin_lock, system will die if user load driver
+	 * and immediately unload driver frequently (dual)
+	 * since they fb_count could change during the lifetime of
+	 * this lock, we are holding it for all cases.
+	 */
+	spin_lock(&sm750_dev->slock);
+
+	sm750_dev->accel.de_copyarea(&sm750_dev->accel,
+				     base, pitch, region->sx, region->sy,
+				     base, pitch, Bpp, region->dx, region->dy,
+				     region->width, region->height,
+				     HW_ROP2_COPY);
+	spin_unlock(&sm750_dev->slock);
+}
+
+static void lynxfb_ops_imageblit(struct fb_info *info,
+				 const struct fb_image *image)
+{
+	unsigned int base, pitch, Bpp;
+	unsigned int fgcol, bgcol;
+	struct lynxfb_par *par;
+	struct sm750_dev *sm750_dev;
+
+	par = info->par;
+	sm750_dev = par->dev;
+	/*
+	 * each time 2d function begin to work,below three variable always need
+	 * be set, seems we can put them together in some place
+	 */
+	base = par->crtc.o_screen;
+	pitch = info->fix.line_length;
+	Bpp = info->var.bits_per_pixel >> 3;
+
+	/* TODO: Implement hardware acceleration for image->depth > 1 */
+	if (image->depth != 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR ||
+	    info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+		fgcol = ((u32 *)info->pseudo_palette)[image->fg_color];
+		bgcol = ((u32 *)info->pseudo_palette)[image->bg_color];
+	} else {
+		fgcol = image->fg_color;
+		bgcol = image->bg_color;
+	}
+
+	/*
+	 * If not use spin_lock, system will die if user load driver
+	 * and immediately unload driver frequently (dual)
+	 * since they fb_count could change during the lifetime of
+	 * this lock, we are holding it for all cases.
+	 */
+	spin_lock(&sm750_dev->slock);
+
+	sm750_dev->accel.de_imageblit(&sm750_dev->accel,
+				      image->data, image->width >> 3, 0,
+				      base, pitch, Bpp,
+				      image->dx, image->dy,
+				      image->width, image->height,
+				      fgcol, bgcol, HW_ROP2_COPY);
+	spin_unlock(&sm750_dev->slock);
+}
+
+static int lynxfb_ops_pan_display(struct fb_var_screeninfo *var,
+				  struct fb_info *info)
+{
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+
+	if (!info)
+		return -EINVAL;
+
+	par = info->par;
+	crtc = &par->crtc;
+	return hw_sm750_pan_display(crtc, var, info);
+}
+
+static inline void lynxfb_set_visual_mode(struct fb_info *info)
+{
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	case 16:
+	case 24:
+	case 32:
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
+	default:
+		break;
+	}
+}
+
+static inline int lynxfb_set_color_offsets(struct fb_info *info)
+{
+	lynxfb_set_visual_mode(info);
+
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		info->var.red.offset = 0;
+		info->var.red.length = 8;
+		info->var.green.offset = 0;
+		info->var.green.length = 8;
+		info->var.blue.offset = 0;
+		info->var.blue.length = 8;
+		info->var.transp.length = 0;
+		info->var.transp.offset = 0;
+		break;
+	case 16:
+		info->var.red.offset = 11;
+		info->var.red.length = 5;
+		info->var.green.offset = 5;
+		info->var.green.length = 6;
+		info->var.blue.offset = 0;
+		info->var.blue.length = 5;
+		info->var.transp.length = 0;
+		info->var.transp.offset = 0;
+		break;
+	case 24:
+	case 32:
+		info->var.red.offset = 16;
+		info->var.red.length = 8;
+		info->var.green.offset = 8;
+		info->var.green.length = 8;
+		info->var.blue.offset = 0;
+		info->var.blue.length = 8;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int lynxfb_ops_set_par(struct fb_info *info)
+{
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+	struct lynxfb_output *output;
+	struct fb_var_screeninfo *var;
+	struct fb_fix_screeninfo *fix;
+	int ret;
+	unsigned int line_length;
+
+	if (!info)
+		return -EINVAL;
+
+	ret = 0;
+	par = info->par;
+	crtc = &par->crtc;
+	output = &par->output;
+	var = &info->var;
+	fix = &info->fix;
+
+	/* fix structure is not so FIX ... */
+	line_length = var->xres_virtual * var->bits_per_pixel / 8;
+	line_length = ALIGN(line_length, crtc->line_pad);
+	fix->line_length = line_length;
+	pr_info("fix->line_length = %d\n", fix->line_length);
+
+	/*
+	 * var->red,green,blue,transp are need to be set by driver
+	 * and these data should be set before setcolreg routine
+	 */
+
+	ret = lynxfb_set_color_offsets(info);
+
+	var->height = -1;
+	var->width = -1;
+	var->accel_flags = 0;/*FB_ACCELF_TEXT;*/
+
+	if (ret) {
+		pr_err("bpp %d not supported\n", var->bits_per_pixel);
+		return ret;
+	}
+	ret = hw_sm750_crtc_setMode(crtc, var, fix);
+	if (!ret)
+		ret = hw_sm750_output_setMode(output, var, fix);
+	return ret;
+}
+
+static inline unsigned int chan_to_field(unsigned int chan,
+					 struct fb_bitfield *bf)
+{
+	chan &= 0xffff;
+	chan >>= 16 - bf->length;
+	return chan << bf->offset;
+}
+
+static int __maybe_unused lynxfb_suspend(struct device *dev)
+{
+	struct fb_info *info;
+	struct sm750_dev *sm750_dev;
+
+	sm750_dev = dev_get_drvdata(dev);
+
+	console_lock();
+	info = sm750_dev->fbinfo[0];
+	if (info)
+		/* 1 means do suspend */
+		fb_set_suspend(info, 1);
+	info = sm750_dev->fbinfo[1];
+	if (info)
+		/* 1 means do suspend */
+		fb_set_suspend(info, 1);
+
+	console_unlock();
+	return 0;
+}
+
+static int __maybe_unused lynxfb_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct fb_info *info;
+	struct sm750_dev *sm750_dev;
+
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+	struct lynx_cursor *cursor;
+
+	sm750_dev = pci_get_drvdata(pdev);
+
+	console_lock();
+
+	hw_sm750_inithw(sm750_dev, pdev);
+
+	info = sm750_dev->fbinfo[0];
+
+	if (info) {
+		par = info->par;
+		crtc = &par->crtc;
+		cursor = &crtc->cursor;
+		memset_io(cursor->vstart, 0x0, cursor->size);
+		memset_io(crtc->v_screen, 0x0, crtc->vidmem_size);
+		lynxfb_ops_set_par(info);
+		fb_set_suspend(info, 0);
+	}
+
+	info = sm750_dev->fbinfo[1];
+
+	if (info) {
+		par = info->par;
+		crtc = &par->crtc;
+		cursor = &crtc->cursor;
+		memset_io(cursor->vstart, 0x0, cursor->size);
+		memset_io(crtc->v_screen, 0x0, crtc->vidmem_size);
+		lynxfb_ops_set_par(info);
+		fb_set_suspend(info, 0);
+	}
+
+	pdev->dev.power.power_state.event = PM_EVENT_RESUME;
+
+	console_unlock();
+	return 0;
+}
+
+static int lynxfb_ops_check_var(struct fb_var_screeninfo *var,
+				struct fb_info *info)
+{
+	int ret;
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+	resource_size_t request;
+
+	ret = 0;
+	par = info->par;
+	crtc = &par->crtc;
+
+	pr_debug("check var:%dx%d-%d\n",
+		 var->xres,
+		 var->yres,
+		 var->bits_per_pixel);
+
+	ret = lynxfb_set_color_offsets(info);
+
+	if (ret) {
+		pr_err("bpp %d not supported\n", var->bits_per_pixel);
+		return ret;
+	}
+
+	var->height = -1;
+	var->width = -1;
+	var->accel_flags = 0;/* FB_ACCELF_TEXT; */
+
+	/* check if current fb's video memory big enough to hold the onscreen*/
+	request = var->xres_virtual * (var->bits_per_pixel >> 3);
+	/* defaulty crtc->channel go with par->index */
+
+	request = ALIGN(request, crtc->line_pad);
+	request = request * var->yres_virtual;
+	if (crtc->vidmem_size < request) {
+		pr_err("not enough video memory for mode\n");
+		return -ENOMEM;
+	}
+
+	return hw_sm750_crtc_checkMode(crtc, var);
+}
+
+static int lynxfb_ops_setcolreg(unsigned int regno,
+				unsigned int red,
+				unsigned int green,
+				unsigned int blue,
+				unsigned int transp,
+				struct fb_info *info)
+{
+	struct lynxfb_par *par;
+	struct lynxfb_crtc *crtc;
+	struct fb_var_screeninfo *var;
+	int ret;
+
+	par = info->par;
+	crtc = &par->crtc;
+	var = &info->var;
+	ret = 0;
+
+	if (regno > 256) {
+		pr_err("regno = %d\n", regno);
+		return -EINVAL;
+	}
+
+	if (info->var.grayscale)
+		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+
+	if (var->bits_per_pixel == 8 &&
+	    info->fix.visual == FB_VISUAL_PSEUDOCOLOR) {
+		red >>= 8;
+		green >>= 8;
+		blue >>= 8;
+		ret = hw_sm750_setColReg(crtc, regno, red, green, blue);
+		goto exit;
+	}
+
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 256) {
+		u32 val;
+
+		if (var->bits_per_pixel == 16 ||
+		    var->bits_per_pixel == 32 ||
+		    var->bits_per_pixel == 24) {
+			val = chan_to_field(red, &var->red);
+			val |= chan_to_field(green, &var->green);
+			val |= chan_to_field(blue, &var->blue);
+			par->pseudo_palette[regno] = val;
+			goto exit;
+		}
+	}
+
+	ret = -EINVAL;
+
+exit:
+	return ret;
+}
+
+static int lynxfb_ops_blank(int blank, struct fb_info *info)
+{
+	struct lynxfb_par *par;
+	struct lynxfb_output *output;
+
+	pr_debug("blank = %d.\n", blank);
+	par = info->par;
+	output = &par->output;
+	return output->proc_setBLANK(output, blank);
+}
+
+static int sm750fb_set_drv(struct lynxfb_par *par)
+{
+	int ret;
+	struct sm750_dev *sm750_dev;
+	struct lynxfb_output *output;
+	struct lynxfb_crtc *crtc;
+
+	ret = 0;
+
+	sm750_dev = par->dev;
+	output = &par->output;
+	crtc = &par->crtc;
+
+	crtc->vidmem_size = sm750_dev->vidmem_size;
+	if (sm750_dev->fb_count > 1)
+		crtc->vidmem_size >>= 1;
+
+	/* setup crtc and output member */
+	sm750_dev->hwCursor = g_hwcursor;
+
+	crtc->line_pad = 16;
+	crtc->xpanstep = 8;
+	crtc->ypanstep = 1;
+	crtc->ywrapstep = 0;
+
+	output->proc_setBLANK = (sm750_dev->revid == SM750LE_REVISION_ID) ?
+				 hw_sm750le_setBLANK : hw_sm750_setBLANK;
+	/* chip specific phase */
+	sm750_dev->accel.de_wait = (sm750_dev->revid == SM750LE_REVISION_ID) ?
+				    hw_sm750le_deWait : hw_sm750_deWait;
+	switch (sm750_dev->dataflow) {
+	case sm750_simul_pri:
+		output->paths = sm750_pnc;
+		crtc->channel = sm750_primary;
+		crtc->o_screen = 0;
+		crtc->v_screen = sm750_dev->pvMem;
+		pr_info("use simul primary mode\n");
+		break;
+	case sm750_simul_sec:
+		output->paths = sm750_pnc;
+		crtc->channel = sm750_secondary;
+		crtc->o_screen = 0;
+		crtc->v_screen = sm750_dev->pvMem;
+		break;
+	case sm750_dual_normal:
+		if (par->index == 0) {
+			output->paths = sm750_panel;
+			crtc->channel = sm750_primary;
+			crtc->o_screen = 0;
+			crtc->v_screen = sm750_dev->pvMem;
+		} else {
+			output->paths = sm750_crt;
+			crtc->channel = sm750_secondary;
+			/* not consider of padding stuffs for o_screen,need fix */
+			crtc->o_screen = sm750_dev->vidmem_size >> 1;
+			crtc->v_screen = sm750_dev->pvMem + crtc->o_screen;
+		}
+		break;
+	case sm750_dual_swap:
+		if (par->index == 0) {
+			output->paths = sm750_panel;
+			crtc->channel = sm750_secondary;
+			crtc->o_screen = 0;
+			crtc->v_screen = sm750_dev->pvMem;
+		} else {
+			output->paths = sm750_crt;
+			crtc->channel = sm750_primary;
+			/* not consider of padding stuffs for o_screen,
+			 * need fix
+			 */
+			crtc->o_screen = sm750_dev->vidmem_size >> 1;
+			crtc->v_screen = sm750_dev->pvMem + crtc->o_screen;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static struct fb_ops lynxfb_ops = {
+	.owner = THIS_MODULE,
+	.fb_check_var =  lynxfb_ops_check_var,
+	.fb_set_par = lynxfb_ops_set_par,
+	.fb_setcolreg = lynxfb_ops_setcolreg,
+	.fb_blank = lynxfb_ops_blank,
+	.fb_fillrect = cfb_fillrect,
+	.fb_imageblit = cfb_imageblit,
+	.fb_copyarea = cfb_copyarea,
+	/* cursor */
+	.fb_cursor = lynxfb_ops_cursor,
+};
+
+static int lynxfb_set_fbinfo(struct fb_info *info, int index)
+{
+	int i;
+	struct lynxfb_par *par;
+	struct sm750_dev *sm750_dev;
+	struct lynxfb_crtc *crtc;
+	struct lynxfb_output *output;
+	struct fb_var_screeninfo *var;
+	struct fb_fix_screeninfo *fix;
+
+	const struct fb_videomode *pdb[] = {
+		lynx750_ext, NULL, vesa_modes,
+	};
+	int cdb[] = {ARRAY_SIZE(lynx750_ext), 0, VESA_MODEDB_SIZE};
+	static const char * const mdb_desc[] = {
+		"driver prepared modes",
+		"kernel prepared default modedb",
+		"kernel HELPERS prepared vesa_modes",
+	};
+
+	static const char *fixId[2] = {
+		"sm750_fb1", "sm750_fb2",
+	};
+
+	int ret, line_length;
+
+	ret = 0;
+	par = (struct lynxfb_par *)info->par;
+	sm750_dev = par->dev;
+	crtc = &par->crtc;
+	output = &par->output;
+	var = &info->var;
+	fix = &info->fix;
+
+	/* set index */
+	par->index = index;
+	output->channel = &crtc->channel;
+	sm750fb_set_drv(par);
+	lynxfb_ops.fb_pan_display = lynxfb_ops_pan_display;
+
+	/*
+	 * set current cursor variable and proc pointer,
+	 * must be set after crtc member initialized
+	 */
+	crtc->cursor.offset = crtc->o_screen + crtc->vidmem_size - 1024;
+	crtc->cursor.mmio = sm750_dev->pvReg +
+		0x800f0 + (int)crtc->channel * 0x140;
+
+	pr_info("crtc->cursor.mmio = %p\n", crtc->cursor.mmio);
+	crtc->cursor.max_h = 64;
+	crtc->cursor.max_w = 64;
+	crtc->cursor.size = crtc->cursor.max_h * crtc->cursor.max_w * 2 / 8;
+	crtc->cursor.vstart = sm750_dev->pvMem + crtc->cursor.offset;
+
+	memset_io(crtc->cursor.vstart, 0, crtc->cursor.size);
+	if (!g_hwcursor) {
+		lynxfb_ops.fb_cursor = NULL;
+		sm750_hw_cursor_disable(&crtc->cursor);
+	}
+
+	/* set info->fbops, must be set before fb_find_mode */
+	if (!sm750_dev->accel_off) {
+		/* use 2d acceleration */
+		lynxfb_ops.fb_fillrect = lynxfb_ops_fillrect;
+		lynxfb_ops.fb_copyarea = lynxfb_ops_copyarea;
+		lynxfb_ops.fb_imageblit = lynxfb_ops_imageblit;
+	}
+	info->fbops = &lynxfb_ops;
+
+	if (!g_fbmode[index]) {
+		g_fbmode[index] = g_def_fbmode;
+		if (index)
+			g_fbmode[index] = g_fbmode[0];
+	}
+
+	for (i = 0; i < 3; i++) {
+		ret = fb_find_mode(var, info, g_fbmode[index],
+				   pdb[i], cdb[i], NULL, 8);
+
+		if (ret == 1) {
+			pr_info("success! use specified mode:%s in %s\n",
+				g_fbmode[index],
+				mdb_desc[i]);
+			break;
+		} else if (ret == 2) {
+			pr_warn("use specified mode:%s in %s,with an ignored refresh rate\n",
+				g_fbmode[index],
+				mdb_desc[i]);
+			break;
+		} else if (ret == 3) {
+			pr_warn("wanna use default mode\n");
+			/*break;*/
+		} else if (ret == 4) {
+			pr_warn("fall back to any valid mode\n");
+		} else {
+			pr_warn("ret = %d,fb_find_mode failed,with %s\n",
+				ret,
+				mdb_desc[i]);
+		}
+	}
+
+	/* some member of info->var had been set by fb_find_mode */
+
+	pr_info("Member of info->var is :\n"
+		"xres=%d\n"
+		"yres=%d\n"
+		"xres_virtual=%d\n"
+		"yres_virtual=%d\n"
+		"xoffset=%d\n"
+		"yoffset=%d\n"
+		"bits_per_pixel=%d\n"
+		" ...\n",
+		var->xres,
+		var->yres,
+		var->xres_virtual,
+		var->yres_virtual,
+		var->xoffset,
+		var->yoffset,
+		var->bits_per_pixel);
+
+	/* set par */
+	par->info = info;
+
+	/* set info */
+	line_length = ALIGN((var->xres_virtual * var->bits_per_pixel / 8),
+			    crtc->line_pad);
+
+	info->pseudo_palette = &par->pseudo_palette[0];
+	info->screen_base = crtc->v_screen;
+	pr_debug("screen_base vaddr = %p\n", info->screen_base);
+	info->screen_size = line_length * var->yres_virtual;
+
+	/* set info->fix */
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->type_aux = 0;
+	fix->xpanstep = crtc->xpanstep;
+	fix->ypanstep = crtc->ypanstep;
+	fix->ywrapstep = crtc->ywrapstep;
+	fix->accel = FB_ACCEL_SMI;
+
+	strscpy(fix->id, fixId[index], sizeof(fix->id));
+
+	fix->smem_start = crtc->o_screen + sm750_dev->vidmem_start;
+	pr_info("fix->smem_start = %lx\n", fix->smem_start);
+	/*
+	 * according to mmap experiment from user space application,
+	 * fix->mmio_len should not larger than virtual size
+	 * (xres_virtual x yres_virtual x ByPP)
+	 * Below line maybe buggy when user mmap fb dev node and write
+	 * data into the bound over virtual size
+	 */
+	fix->smem_len = crtc->vidmem_size;
+	pr_info("fix->smem_len = %x\n", fix->smem_len);
+	info->screen_size = fix->smem_len;
+	fix->line_length = line_length;
+	fix->mmio_start = sm750_dev->vidreg_start;
+	pr_info("fix->mmio_start = %lx\n", fix->mmio_start);
+	fix->mmio_len = sm750_dev->vidreg_size;
+	pr_info("fix->mmio_len = %x\n", fix->mmio_len);
+
+	lynxfb_set_visual_mode(info);
+
+	/* set var */
+	var->activate = FB_ACTIVATE_NOW;
+	var->accel_flags = 0;
+	var->vmode = FB_VMODE_NONINTERLACED;
+
+	pr_debug("#1 show info->cmap :\nstart=%d,len=%d,red=%p,green=%p,blue=%p,transp=%p\n",
+		 info->cmap.start, info->cmap.len,
+		 info->cmap.red, info->cmap.green, info->cmap.blue,
+		 info->cmap.transp);
+
+	ret = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (ret < 0) {
+		pr_err("Could not allocate memory for cmap.\n");
+		goto exit;
+	}
+
+	pr_debug("#2 show info->cmap :\nstart=%d,len=%d,red=%p,green=%p,blue=%p,transp=%p\n",
+		 info->cmap.start, info->cmap.len,
+		 info->cmap.red, info->cmap.green, info->cmap.blue,
+		 info->cmap.transp);
+
+exit:
+	lynxfb_ops_check_var(var, info);
+	return ret;
+}
+
+/*	chip specific g_option configuration routine */
+static void sm750fb_setup(struct sm750_dev *sm750_dev, char *src)
+{
+	char *opt;
+	int swap;
+
+	swap = 0;
+
+	sm750_dev->initParm.chip_clk = 0;
+	sm750_dev->initParm.mem_clk = 0;
+	sm750_dev->initParm.master_clk = 0;
+	sm750_dev->initParm.powerMode = 0;
+	sm750_dev->initParm.setAllEngOff = 0;
+	sm750_dev->initParm.resetMemory = 1;
+
+	/* defaultly turn g_hwcursor on for both view */
+	g_hwcursor = 3;
+
+	if (!src || !*src) {
+		dev_warn(&sm750_dev->pdev->dev, "no specific g_option.\n");
+		goto NO_PARAM;
+	}
+
+	while ((opt = strsep(&src, ":")) != NULL && *opt != 0) {
+		dev_info(&sm750_dev->pdev->dev, "opt=%s\n", opt);
+		dev_info(&sm750_dev->pdev->dev, "src=%s\n", src);
+
+		if (!strncmp(opt, "swap", strlen("swap"))) {
+			swap = 1;
+		} else if (!strncmp(opt, "nocrt", strlen("nocrt"))) {
+			sm750_dev->nocrt = 1;
+		} else if (!strncmp(opt, "36bit", strlen("36bit"))) {
+			sm750_dev->pnltype = sm750_doubleTFT;
+		} else if (!strncmp(opt, "18bit", strlen("18bit"))) {
+			sm750_dev->pnltype = sm750_dualTFT;
+		} else if (!strncmp(opt, "24bit", strlen("24bit"))) {
+			sm750_dev->pnltype = sm750_24TFT;
+		} else if (!strncmp(opt, "nohwc0", strlen("nohwc0"))) {
+			g_hwcursor &= ~0x1;
+		} else if (!strncmp(opt, "nohwc1", strlen("nohwc1"))) {
+			g_hwcursor &= ~0x2;
+		} else if (!strncmp(opt, "nohwc", strlen("nohwc"))) {
+			g_hwcursor = 0;
+		} else {
+			if (!g_fbmode[0]) {
+				g_fbmode[0] = opt;
+				dev_info(&sm750_dev->pdev->dev,
+					 "find fbmode0 : %s\n", g_fbmode[0]);
+			} else if (!g_fbmode[1]) {
+				g_fbmode[1] = opt;
+				dev_info(&sm750_dev->pdev->dev,
+					 "find fbmode1 : %s\n", g_fbmode[1]);
+			} else {
+				dev_warn(&sm750_dev->pdev->dev, "How many view you wann set?\n");
+			}
+		}
+	}
+
+NO_PARAM:
+	if (sm750_dev->revid != SM750LE_REVISION_ID) {
+		if (sm750_dev->fb_count > 1) {
+			if (swap)
+				sm750_dev->dataflow = sm750_dual_swap;
+			else
+				sm750_dev->dataflow = sm750_dual_normal;
+		} else {
+			if (swap)
+				sm750_dev->dataflow = sm750_simul_sec;
+			else
+				sm750_dev->dataflow = sm750_simul_pri;
+		}
+	} else {
+		/* SM750LE only have one crt channel */
+		sm750_dev->dataflow = sm750_simul_sec;
+		/* sm750le do not have complex attributes */
+		sm750_dev->nocrt = 0;
+	}
+}
+
+static void sm750fb_framebuffer_release(struct sm750_dev *sm750_dev)
+{
+	struct fb_info *fb_info;
+
+	while (sm750_dev->fb_count) {
+		fb_info = sm750_dev->fbinfo[sm750_dev->fb_count - 1];
+		unregister_framebuffer(fb_info);
+		framebuffer_release(fb_info);
+		sm750_dev->fb_count--;
+	}
+}
+
+static int sm750fb_framebuffer_alloc(struct sm750_dev *sm750_dev, int fbidx)
+{
+	struct fb_info *fb_info;
+	struct lynxfb_par *par;
+	int err;
+
+	fb_info = framebuffer_alloc(sizeof(struct lynxfb_par),
+				    &sm750_dev->pdev->dev);
+	if (!fb_info)
+		return -ENOMEM;
+
+	sm750_dev->fbinfo[fbidx] = fb_info;
+	par = fb_info->par;
+	par->dev = sm750_dev;
+
+	err = lynxfb_set_fbinfo(fb_info, fbidx);
+	if (err)
+		goto release_fb;
+
+	err = register_framebuffer(fb_info);
+	if (err < 0)
+		goto release_fb;
+
+	sm750_dev->fb_count++;
+
+	return 0;
+
+release_fb:
+	framebuffer_release(fb_info);
+	return err;
+}
+
+static int lynxfb_pci_probe(struct pci_dev *pdev,
+			    const struct pci_device_id *ent)
+{
+	struct sm750_dev *sm750_dev = NULL;
+	int max_fb;
+	int fbidx;
+	int err;
+
+	err = aperture_remove_conflicting_pci_devices(pdev, "sm750_fb1");
+	if (err)
+		return err;
+
+	/* enable device */
+	err = pcim_enable_device(pdev);
+	if (err)
+		return err;
+
+	err = -ENOMEM;
+	sm750_dev = devm_kzalloc(&pdev->dev, sizeof(*sm750_dev), GFP_KERNEL);
+	if (!sm750_dev)
+		return err;
+
+	sm750_dev->fbinfo[0] = NULL;
+	sm750_dev->fbinfo[1] = NULL;
+	sm750_dev->devid = pdev->device;
+	sm750_dev->revid = pdev->revision;
+	sm750_dev->pdev = pdev;
+	sm750_dev->mtrr_off = g_nomtrr;
+	sm750_dev->mtrr.vram = 0;
+	sm750_dev->accel_off = g_noaccel;
+	spin_lock_init(&sm750_dev->slock);
+
+	if (!sm750_dev->accel_off) {
+		/*
+		 * hook deInit and 2d routines, notes that below hw_xxx
+		 * routine can work on most of lynx chips
+		 * if some chip need specific function,
+		 * please hook it in smXXX_set_drv routine
+		 */
+		sm750_dev->accel.de_init = sm750_hw_de_init;
+		sm750_dev->accel.de_fillrect = sm750_hw_fillrect;
+		sm750_dev->accel.de_copyarea = sm750_hw_copyarea;
+		sm750_dev->accel.de_imageblit = sm750_hw_imageblit;
+	}
+
+	/* call chip specific setup routine  */
+	sm750fb_setup(sm750_dev, g_settings);
+
+	/* call chip specific mmap routine */
+	err = hw_sm750_map(sm750_dev, pdev);
+	if (err)
+		return err;
+
+	if (!sm750_dev->mtrr_off)
+		sm750_dev->mtrr.vram = arch_phys_wc_add(sm750_dev->vidmem_start,
+							sm750_dev->vidmem_size);
+
+	memset_io(sm750_dev->pvMem, 0, sm750_dev->vidmem_size);
+
+	pci_set_drvdata(pdev, sm750_dev);
+
+	/* call chipInit routine */
+	hw_sm750_inithw(sm750_dev, pdev);
+
+	/* allocate frame buffer info structures according to g_dualview */
+	max_fb = g_dualview ? 2 : 1;
+	for (fbidx = 0; fbidx < max_fb; fbidx++) {
+		err = sm750fb_framebuffer_alloc(sm750_dev, fbidx);
+		if (err)
+			goto release_fb;
+	}
+
+	return 0;
+
+release_fb:
+	sm750fb_framebuffer_release(sm750_dev);
+	return err;
+}
+
+static void lynxfb_pci_remove(struct pci_dev *pdev)
+{
+	struct sm750_dev *sm750_dev;
+
+	sm750_dev = pci_get_drvdata(pdev);
+
+	sm750fb_framebuffer_release(sm750_dev);
+	arch_phys_wc_del(sm750_dev->mtrr.vram);
+
+	iounmap(sm750_dev->pvReg);
+	iounmap(sm750_dev->pvMem);
+	kfree(g_settings);
+}
+
+static int __init lynxfb_setup(char *options)
+{
+	int len;
+	char *opt, *tmp;
+
+	if (!options || !*options) {
+		pr_warn("no options.\n");
+		return 0;
+	}
+
+	pr_info("options:%s\n", options);
+
+	len = strlen(options) + 1;
+	g_settings = kzalloc(len, GFP_KERNEL);
+	if (!g_settings)
+		return -ENOMEM;
+
+	tmp = g_settings;
+
+	/*
+	 * Notes:
+	 * char * strsep(char **s,const char * ct);
+	 * @s: the string to be searched
+	 * @ct :the characters to search for
+	 *
+	 * strsep() updates @options to pointer after the first found token
+	 * it also returns the pointer ahead the token.
+	 */
+	while ((opt = strsep(&options, ":")) != NULL) {
+		/* options that mean for any lynx chips are configured here */
+		if (!strncmp(opt, "noaccel", strlen("noaccel"))) {
+			g_noaccel = 1;
+		} else if (!strncmp(opt, "nomtrr", strlen("nomtrr"))) {
+			g_nomtrr = 1;
+		} else if (!strncmp(opt, "dual", strlen("dual"))) {
+			g_dualview = 1;
+		} else {
+			strcat(tmp, opt);
+			tmp += strlen(opt);
+			if (options)
+				*tmp++ = ':';
+			else
+				*tmp++ = 0;
+		}
+	}
+
+	/* misc g_settings are transport to chip specific routines */
+	pr_info("parameter left for chip specific analysis:%s\n", g_settings);
+	return 0;
+}
+
+static const struct pci_device_id smi_pci_table[] = {
+	{ PCI_DEVICE(0x126f, 0x0750), },
+	{0,}
+};
+
+MODULE_DEVICE_TABLE(pci, smi_pci_table);
+
+static SIMPLE_DEV_PM_OPS(lynxfb_pm_ops, lynxfb_suspend, lynxfb_resume);
+
+static struct pci_driver lynxfb_driver = {
+	.name =		"sm750fb",
+	.id_table =	smi_pci_table,
+	.probe =	lynxfb_pci_probe,
+	.remove =	lynxfb_pci_remove,
+	.driver.pm =	&lynxfb_pm_ops,
+};
+
+static int __init lynxfb_init(void)
+{
+	char *option;
+
+	if (fb_modesetting_disabled("sm750fb"))
+		return -ENODEV;
+
+#ifdef MODULE
+	option = g_option;
+#else
+	if (fb_get_options("sm750fb", &option))
+		return -ENODEV;
+#endif
+
+	lynxfb_setup(option);
+	return pci_register_driver(&lynxfb_driver);
+}
+module_init(lynxfb_init);
+
+static void __exit lynxfb_exit(void)
+{
+	pci_unregister_driver(&lynxfb_driver);
+}
+module_exit(lynxfb_exit);
+
+module_param(g_option, charp, 0444);
+
+MODULE_PARM_DESC(g_option,
+		 "\n\t\tCommon options:\n"
+		 "\t\tnoaccel:disable 2d capabilities\n"
+		 "\t\tnomtrr:disable MTRR attribute for video memory\n"
+		 "\t\tdualview:dual frame buffer feature enabled\n"
+		 "\t\tnohwc:disable hardware cursor\n"
+		 "\t\tUsual example:\n"
+		 "\t\tinsmod ./sm750fb.ko g_option=\"noaccel,nohwc,1280x1024-8@60\"\n"
+		 );
+
+MODULE_AUTHOR("monk liu <monk.liu@siliconmotion.com>");
+MODULE_AUTHOR("Sudip Mukherjee <sudip@vectorindia.org>");
+MODULE_DESCRIPTION("Frame buffer driver for SM750 chipset");
+MODULE_LICENSE("Dual BSD/GPL");