Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2303 insertions, 0 deletions

diff --git a/drivers/media/video/planb.c b/drivers/media/video/planb.c
new file mode 100644
index 000000000000..b19c33434eaf
--- /dev/null
+++ b/drivers/media/video/planb.c
@@ -0,0 +1,2303 @@
+/* 
+    planb - PlanB frame grabber driver
+
+    PlanB is used in the 7x00/8x00 series of PowerMacintosh
+    Computers as video input DMA controller.
+
+    Copyright (C) 1998 Michel Lanners (mlan@cpu.lu)
+
+    Based largely on the bttv driver by Ralph Metzler (rjkm@thp.uni-koeln.de)
+
+    Additional debugging and coding by Takashi Oe (toe@unlserve.unl.edu)
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+/* $Id: planb.c,v 1.18 1999/05/02 17:36:34 mlan Exp $ */
+
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/videodev.h>
+#include <linux/wait.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/dbdma.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/irq.h>
+#include <asm/semaphore.h>
+
+#include "planb.h"
+#include "saa7196.h"
+
+/* Would you mind for some ugly debugging? */
+#if 0
+#define DEBUG(x...) printk(KERN_DEBUG ## x) /* Debug driver */
+#else
+#define DEBUG(x...) 		/* Don't debug driver */
+#endif
+
+#if 0
+#define IDEBUG(x...) printk(KERN_DEBUG ## x) /* Debug interrupt part */
+#else
+#define IDEBUG(x...) 		/* Don't debug interrupt part */
+#endif
+
+/* Ever seen a Mac with more than 1 of these? */
+#define PLANB_MAX 1
+
+static int planb_num;
+static struct planb planbs[PLANB_MAX];
+static volatile struct planb_registers *planb_regs;
+
+static int def_norm = PLANB_DEF_NORM;	/* default norm */
+static int video_nr = -1;
+
+MODULE_PARM(def_norm, "i");
+MODULE_PARM_DESC(def_norm, "Default startup norm (0=PAL, 1=NTSC, 2=SECAM)");
+MODULE_PARM(video_nr,"i");
+MODULE_LICENSE("GPL");
+
+
+/* ------------------ PlanB Exported Functions ------------------ */
+static long planb_write(struct video_device *, const char *, unsigned long, int);
+static long planb_read(struct video_device *, char *, unsigned long, int);
+static int planb_open(struct video_device *, int);
+static void planb_close(struct video_device *);
+static int planb_ioctl(struct video_device *, unsigned int, void *);
+static int planb_init_done(struct video_device *);
+static int planb_mmap(struct video_device *, const char *, unsigned long);
+static void planb_irq(int, void *, struct pt_regs *);
+static void release_planb(void);
+int init_planbs(struct video_init *);
+
+/* ------------------ PlanB Internal Functions ------------------ */
+static int planb_prepare_open(struct planb *);
+static void planb_prepare_close(struct planb *);
+static void saa_write_reg(unsigned char, unsigned char);
+static unsigned char saa_status(int, struct planb *);
+static void saa_set(unsigned char, unsigned char, struct planb *);
+static void saa_init_regs(struct planb *);
+static int grabbuf_alloc(struct planb *);
+static int vgrab(struct planb *, struct video_mmap *);
+static void add_clip(struct planb *, struct video_clip *);
+static void fill_cmd_buff(struct planb *);
+static void cmd_buff(struct planb *);
+static volatile struct dbdma_cmd *setup_grab_cmd(int, struct planb *);
+static void overlay_start(struct planb *);
+static void overlay_stop(struct planb *);
+static inline void tab_cmd_dbdma(volatile struct dbdma_cmd *, unsigned short,
+	unsigned int);
+static inline void tab_cmd_store(volatile struct dbdma_cmd *, unsigned int,
+	unsigned int);
+static inline void tab_cmd_gen(volatile struct dbdma_cmd *, unsigned short,
+	unsigned short, unsigned int, unsigned int);
+static int init_planb(struct planb *);
+static int find_planb(void);
+static void planb_pre_capture(int, int, struct planb *);
+static volatile struct dbdma_cmd *cmd_geo_setup(volatile struct dbdma_cmd *,
+					int, int, int, int, int, struct planb *);
+static inline void planb_dbdma_stop(volatile struct dbdma_regs *);
+static unsigned int saa_geo_setup(int, int, int, int, struct planb *);
+static inline int overlay_is_active(struct planb *);
+
+/*******************************/
+/* Memory management functions */
+/*******************************/
+
+static int grabbuf_alloc(struct planb *pb)
+{
+	int i, npage;
+
+	npage = MAX_GBUFFERS * ((PLANB_MAX_FBUF / PAGE_SIZE + 1)
+#ifndef PLANB_GSCANLINE
+		+ MAX_LNUM
+#endif /* PLANB_GSCANLINE */
+		);
+	if ((pb->rawbuf = (unsigned char**) kmalloc (npage
+				* sizeof(unsigned long), GFP_KERNEL)) == 0)
+		return -ENOMEM;
+	for (i = 0; i < npage; i++) {
+		pb->rawbuf[i] = (unsigned char *)__get_free_pages(GFP_KERNEL
+								|GFP_DMA, 0);
+		if (!pb->rawbuf[i])
+			break;
+		SetPageReserved(virt_to_page(pb->rawbuf[i]));
+	}
+	if (i-- < npage) {
+		printk(KERN_DEBUG "PlanB: init_grab: grab buffer not allocated\n");
+		for (; i > 0; i--) {
+			ClearPageReserved(virt_to_page(pb->rawbuf[i]));
+			free_pages((unsigned long)pb->rawbuf[i], 0);
+		}
+		kfree(pb->rawbuf);
+		return -ENOBUFS;
+	}
+	pb->rawbuf_size = npage;
+	return 0;
+}
+
+/*****************************/
+/* Hardware access functions */
+/*****************************/
+
+static void saa_write_reg(unsigned char addr, unsigned char val)
+{
+	planb_regs->saa_addr = addr; eieio();
+	planb_regs->saa_regval = val; eieio();
+	return;
+}
+
+/* return  status byte 0 or 1: */
+static unsigned char saa_status(int byte, struct planb *pb)
+{
+	saa_regs[pb->win.norm][SAA7196_STDC] =
+		(saa_regs[pb->win.norm][SAA7196_STDC] & ~2) | ((byte & 1) << 1);
+	saa_write_reg (SAA7196_STDC, saa_regs[pb->win.norm][SAA7196_STDC]);
+
+	/* Let's wait 30msec for this one */
+	msleep_interruptible(30);
+
+	return (unsigned char)in_8 (&planb_regs->saa_status);
+}
+
+static void saa_set(unsigned char addr, unsigned char val, struct planb *pb)
+{
+	if(saa_regs[pb->win.norm][addr] != val) {
+		saa_regs[pb->win.norm][addr] = val;
+		saa_write_reg (addr, val);
+	}
+	return;
+}
+
+static void saa_init_regs(struct planb *pb)
+{
+	int i;
+
+	for (i = 0; i < SAA7196_NUMREGS; i++)
+		saa_write_reg (i, saa_regs[pb->win.norm][i]);
+}
+
+static unsigned int saa_geo_setup(int width, int height, int interlace, int bpp,
+	struct planb *pb)
+{
+	int ht, norm = pb->win.norm;
+
+	switch(bpp) {
+	case 2:
+		/* RGB555+a 1x16-bit + 16-bit transparent */
+		saa_regs[norm][SAA7196_FMTS] &= ~0x3;
+		break;
+	case 1:
+	case 4:
+		/* RGB888 1x24-bit + 8-bit transparent */
+		saa_regs[norm][SAA7196_FMTS] &= ~0x1;
+		saa_regs[norm][SAA7196_FMTS] |= 0x2;
+		break;
+	default:
+		return -EINVAL;
+	}
+	ht = (interlace ? height / 2 : height);
+	saa_regs[norm][SAA7196_OUTPIX] = (unsigned char) (width & 0x00ff);
+	saa_regs[norm][SAA7196_HFILT] = (saa_regs[norm][SAA7196_HFILT] & ~0x3)
+						| (width >> 8 & 0x3);
+	saa_regs[norm][SAA7196_OUTLINE] = (unsigned char) (ht & 0xff);
+	saa_regs[norm][SAA7196_VYP] = (saa_regs[norm][SAA7196_VYP] & ~0x3)
+						| (ht >> 8 & 0x3);
+	/* feed both fields if interlaced, or else feed only even fields */
+	saa_regs[norm][SAA7196_FMTS] = (interlace) ?
+					(saa_regs[norm][SAA7196_FMTS] & ~0x60)
+					: (saa_regs[norm][SAA7196_FMTS] | 0x60);
+	/* transparent mode; extended format enabled */
+	saa_regs[norm][SAA7196_DPATH] |= 0x3;
+
+	return 0;
+}
+
+/***************************/
+/* DBDMA support functions */
+/***************************/
+
+static inline void planb_dbdma_restart(volatile struct dbdma_regs *ch)
+{
+	out_le32(&ch->control, PLANB_CLR(RUN));
+	out_le32(&ch->control, PLANB_SET(RUN|WAKE) | PLANB_CLR(PAUSE));
+}
+
+static inline void planb_dbdma_stop(volatile struct dbdma_regs *ch)
+{
+	int i = 0;
+
+	out_le32(&ch->control, PLANB_CLR(RUN) | PLANB_SET(FLUSH));
+	while((in_le32(&ch->status) == (ACTIVE | FLUSH)) && (i < 999)) {
+		IDEBUG("PlanB: waiting for DMA to stop\n");
+		i++;
+	}
+}
+
+static inline void tab_cmd_dbdma(volatile struct dbdma_cmd *ch,
+	unsigned short command, unsigned int cmd_dep)
+{
+	st_le16(&ch->command, command);
+	st_le32(&ch->cmd_dep, cmd_dep);
+}
+
+static inline void tab_cmd_store(volatile struct dbdma_cmd *ch,
+	unsigned int phy_addr, unsigned int cmd_dep)
+{
+	st_le16(&ch->command, STORE_WORD | KEY_SYSTEM);
+	st_le16(&ch->req_count, 4);
+	st_le32(&ch->phy_addr, phy_addr);
+	st_le32(&ch->cmd_dep, cmd_dep);
+}
+
+static inline void tab_cmd_gen(volatile struct dbdma_cmd *ch,
+	unsigned short command, unsigned short req_count,
+	unsigned int phy_addr, unsigned int cmd_dep)
+{
+	st_le16(&ch->command, command);
+	st_le16(&ch->req_count, req_count);
+	st_le32(&ch->phy_addr, phy_addr);
+	st_le32(&ch->cmd_dep, cmd_dep);
+}
+
+static volatile struct dbdma_cmd *cmd_geo_setup(
+	volatile struct dbdma_cmd *c1, int width, int height, int interlace,
+	int bpp, int clip, struct planb *pb)
+{
+	int norm = pb->win.norm;
+
+	if((saa_geo_setup(width, height, interlace, bpp, pb)) != 0)
+		return (volatile struct dbdma_cmd *)NULL;
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_FMTS);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_FMTS]);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_DPATH);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_DPATH]);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->even),
+					bpp | ((clip)? PLANB_CLIPMASK: 0));
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->odd),
+					bpp | ((clip)? PLANB_CLIPMASK: 0));
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_OUTPIX);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_OUTPIX]);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_HFILT);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_HFILT]);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_OUTLINE);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_OUTLINE]);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_addr),
+							SAA7196_VYP);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->saa_regval),
+					saa_regs[norm][SAA7196_VYP]);
+	return c1;
+}
+
+/******************************/
+/* misc. supporting functions */
+/******************************/
+
+static inline void planb_lock(struct planb *pb)
+{
+	down(&pb->lock);
+}
+
+static inline void planb_unlock(struct planb *pb)
+{
+	up(&pb->lock);
+}
+
+/***************/
+/* Driver Core */
+/***************/
+
+static int planb_prepare_open(struct planb *pb)
+{
+	int	i, size;
+
+	/* allocate memory for two plus alpha command buffers (size: max lines,
+	   plus 40 commands handling, plus 1 alignment), plus dummy command buf,
+	   plus clipmask buffer, plus frame grabbing status */
+	size = (pb->tab_size*(2+MAX_GBUFFERS*TAB_FACTOR)+1+MAX_GBUFFERS
+		* PLANB_DUMMY)*sizeof(struct dbdma_cmd)
+		+(PLANB_MAXLINES*((PLANB_MAXPIXELS+7)& ~7))/8
+		+MAX_GBUFFERS*sizeof(unsigned int);
+	if ((pb->priv_space = kmalloc (size, GFP_KERNEL)) == 0)
+		return -ENOMEM;
+	memset ((void *) pb->priv_space, 0, size);
+	pb->overlay_last1 = pb->ch1_cmd = (volatile struct dbdma_cmd *)
+						DBDMA_ALIGN (pb->priv_space);
+	pb->overlay_last2 = pb->ch2_cmd = pb->ch1_cmd + pb->tab_size;
+	pb->ch1_cmd_phys = virt_to_bus(pb->ch1_cmd);
+	pb->cap_cmd[0] = pb->ch2_cmd + pb->tab_size;
+	pb->pre_cmd[0] = pb->cap_cmd[0] + pb->tab_size * TAB_FACTOR;
+	for (i = 1; i < MAX_GBUFFERS; i++) {
+		pb->cap_cmd[i] = pb->pre_cmd[i-1] + PLANB_DUMMY;
+		pb->pre_cmd[i] = pb->cap_cmd[i] + pb->tab_size * TAB_FACTOR;
+	}
+	pb->frame_stat=(volatile unsigned int *)(pb->pre_cmd[MAX_GBUFFERS-1]
+						+ PLANB_DUMMY);
+	pb->mask = (unsigned char *)(pb->frame_stat+MAX_GBUFFERS);
+
+	pb->rawbuf = NULL;
+	pb->rawbuf_size = 0;
+	pb->grabbing = 0;
+	for (i = 0; i < MAX_GBUFFERS; i++) {
+		pb->frame_stat[i] = GBUFFER_UNUSED;
+		pb->gwidth[i] = 0;
+		pb->gheight[i] = 0;
+		pb->gfmt[i] = 0;
+		pb->gnorm_switch[i] = 0;
+#ifndef PLANB_GSCANLINE
+		pb->lsize[i] = 0;
+		pb->lnum[i] = 0;
+#endif /* PLANB_GSCANLINE */
+	}
+	pb->gcount = 0;
+	pb->suspend = 0;
+	pb->last_fr = -999;
+	pb->prev_last_fr = -999;
+
+	/* Reset DMA controllers */
+	planb_dbdma_stop(&pb->planb_base->ch2);
+	planb_dbdma_stop(&pb->planb_base->ch1);
+
+	return 0;
+}
+
+static void planb_prepare_close(struct planb *pb)
+{
+	int i;
+
+	/* make sure the dma's are idle */
+	planb_dbdma_stop(&pb->planb_base->ch2);
+	planb_dbdma_stop(&pb->planb_base->ch1);
+	/* free kernel memory of command buffers */
+	if(pb->priv_space != 0) {
+		kfree (pb->priv_space);
+		pb->priv_space = 0;
+		pb->cmd_buff_inited = 0;
+	}
+	if(pb->rawbuf) {
+		for (i = 0; i < pb->rawbuf_size; i++) {
+			ClearPageReserved(virt_to_page(pb->rawbuf[i]));
+			free_pages((unsigned long)pb->rawbuf[i], 0);
+		}
+		kfree(pb->rawbuf);
+	}
+	pb->rawbuf = NULL;
+}
+
+/*****************************/
+/* overlay support functions */
+/*****************************/
+
+static inline int overlay_is_active(struct planb *pb)
+{
+	unsigned int size = pb->tab_size * sizeof(struct dbdma_cmd);
+	unsigned int caddr = (unsigned)in_le32(&pb->planb_base->ch1.cmdptr);
+
+	return (in_le32(&pb->overlay_last1->cmd_dep) == pb->ch1_cmd_phys)
+			&& (caddr < (pb->ch1_cmd_phys + size))
+			&& (caddr >= (unsigned)pb->ch1_cmd_phys);
+}
+
+static void overlay_start(struct planb *pb)
+{
+
+	DEBUG("PlanB: overlay_start()\n");
+
+	if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) {
+
+		DEBUG("PlanB: presumably, grabbing is in progress...\n");
+
+		planb_dbdma_stop(&pb->planb_base->ch2);
+		out_le32 (&pb->planb_base->ch2.cmdptr,
+						virt_to_bus(pb->ch2_cmd));
+		planb_dbdma_restart(&pb->planb_base->ch2);
+		st_le16 (&pb->ch1_cmd->command, DBDMA_NOP);
+		tab_cmd_dbdma(pb->last_cmd[pb->last_fr],
+					DBDMA_NOP | BR_ALWAYS,
+					virt_to_bus(pb->ch1_cmd));
+		eieio();
+		pb->prev_last_fr = pb->last_fr;
+		pb->last_fr = -2;
+		if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) {
+			IDEBUG("PlanB: became inactive "
+				"in the mean time... reactivating\n");
+			planb_dbdma_stop(&pb->planb_base->ch1);
+			out_le32 (&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->ch1_cmd));
+			planb_dbdma_restart(&pb->planb_base->ch1);
+		}
+	} else {
+
+		DEBUG("PlanB: currently idle, so can do whatever\n");
+
+		planb_dbdma_stop(&pb->planb_base->ch2);
+		planb_dbdma_stop(&pb->planb_base->ch1);
+		st_le32 (&pb->planb_base->ch2.cmdptr,
+						virt_to_bus(pb->ch2_cmd));
+		st_le32 (&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->ch1_cmd));
+		out_le16 (&pb->ch1_cmd->command, DBDMA_NOP);
+		planb_dbdma_restart(&pb->planb_base->ch2);
+		planb_dbdma_restart(&pb->planb_base->ch1);
+		pb->last_fr = -1;
+	}
+	return;
+}
+
+static void overlay_stop(struct planb *pb)
+{
+	DEBUG("PlanB: overlay_stop()\n");
+
+	if(pb->last_fr == -1) {
+
+		DEBUG("PlanB: no grabbing, it seems...\n");
+
+		planb_dbdma_stop(&pb->planb_base->ch2);
+		planb_dbdma_stop(&pb->planb_base->ch1);
+		pb->last_fr = -999;
+	} else if(pb->last_fr == -2) {
+		unsigned int cmd_dep;
+		tab_cmd_dbdma(pb->cap_cmd[pb->prev_last_fr], DBDMA_STOP, 0);
+		eieio();
+		cmd_dep = (unsigned int)in_le32(&pb->overlay_last1->cmd_dep);
+		if(overlay_is_active(pb)) {
+
+			DEBUG("PlanB: overlay is currently active\n");
+
+			planb_dbdma_stop(&pb->planb_base->ch2);
+			planb_dbdma_stop(&pb->planb_base->ch1);
+			if(cmd_dep != pb->ch1_cmd_phys) {
+				out_le32(&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->overlay_last1));
+				planb_dbdma_restart(&pb->planb_base->ch1);
+			}
+		}
+		pb->last_fr = pb->prev_last_fr;
+		pb->prev_last_fr = -999;
+	}
+	return;
+}
+
+static void suspend_overlay(struct planb *pb)
+{
+	int fr = -1;
+	struct dbdma_cmd last;
+
+	DEBUG("PlanB: suspend_overlay: %d\n", pb->suspend);
+
+	if(pb->suspend++)
+		return;
+	if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) {
+		if(pb->last_fr == -2) {
+			fr = pb->prev_last_fr;
+			memcpy(&last, (void*)pb->last_cmd[fr], sizeof(last));
+			tab_cmd_dbdma(pb->last_cmd[fr], DBDMA_STOP, 0);
+		}
+		if(overlay_is_active(pb)) {
+			planb_dbdma_stop(&pb->planb_base->ch2);
+			planb_dbdma_stop(&pb->planb_base->ch1);
+			pb->suspended.overlay = 1;
+			pb->suspended.frame = fr;
+			memcpy(&pb->suspended.cmd, &last, sizeof(last));
+			return;
+		}
+	}
+	pb->suspended.overlay = 0;
+	pb->suspended.frame = fr;
+	memcpy(&pb->suspended.cmd, &last, sizeof(last));
+	return;
+}
+
+static void resume_overlay(struct planb *pb)
+{
+
+	DEBUG("PlanB: resume_overlay: %d\n", pb->suspend);
+
+	if(pb->suspend > 1)
+		return;
+	if(pb->suspended.frame != -1) {
+		memcpy((void*)pb->last_cmd[pb->suspended.frame],
+				&pb->suspended.cmd, sizeof(pb->suspended.cmd));
+	}
+	if(ACTIVE & in_le32(&pb->planb_base->ch1.status)) {
+		goto finish;
+	}
+	if(pb->suspended.overlay) {
+
+		DEBUG("PlanB: overlay being resumed\n");
+
+		st_le16 (&pb->ch1_cmd->command, DBDMA_NOP);
+		st_le16 (&pb->ch2_cmd->command, DBDMA_NOP);
+		/* Set command buffer addresses */
+		st_le32(&pb->planb_base->ch1.cmdptr,
+					virt_to_bus(pb->overlay_last1));
+		out_le32(&pb->planb_base->ch2.cmdptr,
+					virt_to_bus(pb->overlay_last2));
+		/* Start the DMA controller */
+		out_le32 (&pb->planb_base->ch2.control,
+				PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE));
+		out_le32 (&pb->planb_base->ch1.control,
+				PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE));
+	} else if(pb->suspended.frame != -1) {
+		out_le32(&pb->planb_base->ch1.cmdptr,
+				virt_to_bus(pb->last_cmd[pb->suspended.frame]));
+		out_le32 (&pb->planb_base->ch1.control,
+				PLANB_CLR(PAUSE) | PLANB_SET(RUN|WAKE));
+	}
+
+finish:
+	pb->suspend--;
+	wake_up_interruptible(&pb->suspendq);
+}
+
+static void add_clip(struct planb *pb, struct video_clip *clip) 
+{
+	volatile unsigned char	*base;
+	int	xc = clip->x, yc = clip->y;
+	int	wc = clip->width, hc = clip->height;
+	int	ww = pb->win.width, hw = pb->win.height;
+	int	x, y, xtmp1, xtmp2;
+
+	DEBUG("PlanB: clip %dx%d+%d+%d\n", wc, hc, xc, yc);
+
+	if(xc < 0) {
+		wc += xc;
+		xc = 0;
+	}
+	if(yc < 0) {
+		hc += yc;
+		yc = 0;
+	}
+	if(xc + wc > ww)
+		wc = ww - xc;
+	if(wc <= 0) /* Nothing to do */
+		return;
+	if(yc + hc > hw)
+		hc = hw - yc;
+
+	for (y = yc; y < yc+hc; y++) {
+		xtmp1=xc>>3;
+		xtmp2=(xc+wc)>>3;
+		base = pb->mask + y*96;
+		if(xc != 0 || wc >= 8)
+			*(base + xtmp1) &= (unsigned char)(0x00ff &
+				(0xff00 >> (xc&7)));
+		for (x = xtmp1 + 1; x < xtmp2; x++) {
+			*(base + x) = 0;
+		}
+		if(xc < (ww & ~0x7))
+			*(base + xtmp2) &= (unsigned char)(0x00ff >>
+				((xc+wc) & 7));
+	}
+
+	return;
+}
+
+static void fill_cmd_buff(struct planb *pb)
+{
+	int restore = 0;
+	volatile struct dbdma_cmd last;
+
+	DEBUG("PlanB: fill_cmd_buff()\n");
+
+	if(pb->overlay_last1 != pb->ch1_cmd) {
+		restore = 1;
+		last = *(pb->overlay_last1);
+	}
+	memset ((void *) pb->ch1_cmd, 0, 2 * pb->tab_size
+					* sizeof(struct dbdma_cmd));
+	cmd_buff (pb);
+	if(restore)
+		*(pb->overlay_last1) = last;
+	if(pb->suspended.overlay) {
+		unsigned long jump_addr = in_le32(&pb->overlay_last1->cmd_dep);
+		if(jump_addr != pb->ch1_cmd_phys) {
+			int i;
+
+			DEBUG("PlanB: adjusting ch1's jump address\n");
+
+			for(i = 0; i < MAX_GBUFFERS; i++) {
+				if(pb->need_pre_capture[i]) {
+				    if(jump_addr == virt_to_bus(pb->pre_cmd[i]))
+					goto found;
+				} else {
+				    if(jump_addr == virt_to_bus(pb->cap_cmd[i]))
+					goto found;
+				}
+			}
+
+			DEBUG("PlanB: not found...\n");
+
+			goto out;
+found:
+			if(pb->need_pre_capture[i])
+				out_le32(&pb->pre_cmd[i]->phy_addr,
+						virt_to_bus(pb->overlay_last1));
+			else
+				out_le32(&pb->cap_cmd[i]->phy_addr,
+						virt_to_bus(pb->overlay_last1));
+		}
+	}
+out:
+	pb->cmd_buff_inited = 1;
+
+	return;
+}
+
+static void cmd_buff(struct planb *pb)
+{
+	int		i, bpp, count, nlines, stepsize, interlace;
+	unsigned long	base, jump, addr_com, addr_dep;
+	volatile struct dbdma_cmd *c1 = pb->ch1_cmd;
+	volatile struct dbdma_cmd *c2 = pb->ch2_cmd;
+
+	interlace = pb->win.interlace;
+	bpp = pb->win.bpp;
+	count = (bpp * ((pb->win.x + pb->win.width > pb->win.swidth) ?
+		(pb->win.swidth - pb->win.x) : pb->win.width));
+	nlines = ((pb->win.y + pb->win.height > pb->win.sheight) ?
+		(pb->win.sheight - pb->win.y) : pb->win.height);
+
+	/* Do video in: */
+
+	/* Preamble commands: */
+	addr_com = virt_to_bus(c1);
+	addr_dep = virt_to_bus(&c1->cmd_dep);
+	tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
+	jump = virt_to_bus(c1+16); /* 14 by cmd_geo_setup() and 2 for padding */
+	if((c1 = cmd_geo_setup(c1, pb->win.width, pb->win.height, interlace,
+					bpp, 1, pb)) == NULL) {
+		printk(KERN_WARNING "PlanB: encountered serious problems\n");
+		tab_cmd_dbdma(pb->ch1_cmd + 1, DBDMA_STOP, 0);
+		tab_cmd_dbdma(pb->ch2_cmd + 1, DBDMA_STOP, 0);
+		return;
+	}
+	tab_cmd_store(c1++, addr_com, (unsigned)(DBDMA_NOP | BR_ALWAYS) << 16);
+	tab_cmd_store(c1++, addr_dep, jump);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.wait_sel),
+							PLANB_SET(FIELD_SYNC));
+		/* (1) wait for field sync to be set */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+							PLANB_SET(ODD_FIELD));
+		/* wait for field sync to be cleared */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+		/* if not odd field, wait until field sync is set again */
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
+		/* assert ch_sync to ch2 */
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch2.control),
+							PLANB_SET(CH_SYNC));
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+							PLANB_SET(DMA_ABORT));
+
+	base = (pb->frame_buffer_phys + pb->offset + pb->win.y * (pb->win.bpl
+					+ pb->win.pad) + pb->win.x * bpp);
+
+	if (interlace) {
+		stepsize = 2;
+		jump = virt_to_bus(c1 + (nlines + 1) / 2);
+	} else {
+		stepsize = 1;
+		jump = virt_to_bus(c1 + nlines);
+	}
+
+	/* even field data: */
+	for (i=0; i < nlines; i += stepsize, c1++)
+		tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET,
+			count, base + i * (pb->win.bpl + pb->win.pad), jump);
+
+	/* For non-interlaced, we use even fields only */
+	if (!interlace)
+		goto cmd_tab_data_end;
+
+	/* Resync to odd field */
+		/* (2) wait for field sync to be set */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+							PLANB_SET(ODD_FIELD));
+		/* wait for field sync to be cleared */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+		/* if not odd field, wait until field sync is set again */
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
+		/* assert ch_sync to ch2 */
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch2.control),
+							PLANB_SET(CH_SYNC));
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+							PLANB_SET(DMA_ABORT));
+	
+	/* odd field data: */
+	jump = virt_to_bus(c1 + nlines / 2);
+	for (i=1; i < nlines; i += stepsize, c1++)
+		tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
+			base + i * (pb->win.bpl + pb->win.pad), jump);
+
+	/* And jump back to the start */
+cmd_tab_data_end:
+	pb->overlay_last1 = c1;	/* keep a pointer to the last command */
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, virt_to_bus(pb->ch1_cmd));
+
+	/* Clipmask command buffer */
+
+	/* Preamble commands: */
+	tab_cmd_dbdma(c2++, DBDMA_NOP, 0);
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.wait_sel),
+							PLANB_SET(CH_SYNC));
+		/* wait until ch1 asserts ch_sync */
+	tab_cmd_dbdma(c2++, DBDMA_NOP | WAIT_IFCLR, 0);
+		/* clear ch_sync asserted by ch1 */
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.control),
+							PLANB_CLR(CH_SYNC));
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.wait_sel),
+							PLANB_SET(FIELD_SYNC));
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.br_sel),
+							PLANB_SET(ODD_FIELD));
+
+	/* jump to end of even field if appropriate */
+	/* this points to (interlace)? pos. C: pos. B */
+	jump = (interlace) ? virt_to_bus(c2 + (nlines + 1) / 2 + 2):
+						virt_to_bus(c2 + nlines + 2);
+		/* if odd field, skip over to odd field clipmasking */
+	tab_cmd_dbdma(c2++, DBDMA_NOP | BR_IFSET, jump);
+
+	/* even field mask: */
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.br_sel),
+							PLANB_SET(DMA_ABORT));
+	/* this points to pos. B */
+	jump = (interlace) ? virt_to_bus(c2 + nlines + 1):
+						virt_to_bus(c2 + nlines);
+	base = virt_to_bus(pb->mask);
+	for (i=0; i < nlines; i += stepsize, c2++)
+		tab_cmd_gen(c2, OUTPUT_MORE | KEY_STREAM0 | BR_IFSET, 96,
+			base + i * 96, jump);
+
+	/* For non-interlaced, we use only even fields */
+	if(!interlace)
+		goto cmd_tab_mask_end;
+
+	/* odd field mask: */
+/* C */	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch2.br_sel),
+							PLANB_SET(DMA_ABORT));
+	/* this points to pos. B */
+	jump = virt_to_bus(c2 + nlines / 2);
+	base = virt_to_bus(pb->mask);
+	for (i=1; i < nlines; i += 2, c2++)     /* abort if set */
+		tab_cmd_gen(c2, OUTPUT_MORE | KEY_STREAM0 | BR_IFSET, 96,
+			base + i * 96, jump);
+
+	/* Inform channel 1 and jump back to start */
+cmd_tab_mask_end:
+	/* ok, I just realized this is kind of flawed. */
+	/* this part is reached only after odd field clipmasking. */
+	/* wanna clean up? */
+		/* wait for field sync to be set */
+		/* corresponds to fsync (1) of ch1 */
+/* B */	tab_cmd_dbdma(c2++, DBDMA_NOP | WAIT_IFCLR, 0);
+		/* restart ch1, meant to clear any dead bit or something */
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch1.control),
+							PLANB_CLR(RUN));
+	tab_cmd_store(c2++, (unsigned)(&pb->planb_base_phys->ch1.control),
+							PLANB_SET(RUN));
+	pb->overlay_last2 = c2;	/* keep a pointer to the last command */
+		/* start over even field clipmasking */
+	tab_cmd_dbdma(c2, DBDMA_NOP | BR_ALWAYS, virt_to_bus(pb->ch2_cmd));
+
+	eieio();
+	return;
+}
+
+/*********************************/
+/* grabdisplay support functions */
+/*********************************/
+
+static int palette2fmt[] = {
+       0,
+       PLANB_GRAY,
+       0,
+       0,
+       0,
+       PLANB_COLOUR32,
+       PLANB_COLOUR15,
+       0,
+       0,
+       0,
+       0,
+       0,
+       0,
+       0,
+       0,
+};
+
+#define PLANB_PALETTE_MAX 15
+
+static int vgrab(struct planb *pb, struct video_mmap *mp)
+{
+	unsigned int fr = mp->frame;
+	unsigned int format;
+
+	if(pb->rawbuf==NULL) {
+		int err;
+		if((err=grabbuf_alloc(pb)))
+			return err;
+	}
+
+	IDEBUG("PlanB: grab %d: %dx%d(%u)\n", pb->grabbing,
+						mp->width, mp->height, fr);
+
+	if(pb->grabbing >= MAX_GBUFFERS)
+		return -ENOBUFS;
+	if(fr > (MAX_GBUFFERS - 1) || fr < 0)
+		return -EINVAL;
+	if(mp->height <= 0 || mp->width <= 0)
+		return -EINVAL;
+	if(mp->format < 0 || mp->format >= PLANB_PALETTE_MAX)
+		return -EINVAL;
+	if((format = palette2fmt[mp->format]) == 0)
+		return -EINVAL;
+	if (mp->height * mp->width * format > PLANB_MAX_FBUF) /* format = bpp */
+		return -EINVAL;
+
+	planb_lock(pb);
+	if(mp->width != pb->gwidth[fr] || mp->height != pb->gheight[fr] ||
+			format != pb->gfmt[fr] || (pb->gnorm_switch[fr])) {
+		int i;
+#ifndef PLANB_GSCANLINE
+		unsigned int osize = pb->gwidth[fr] * pb->gheight[fr]
+								* pb->gfmt[fr];
+		unsigned int nsize = mp->width * mp->height * format;
+#endif
+
+		IDEBUG("PlanB: gwidth = %d, gheight = %d, mp->format = %u\n",
+					mp->width, mp->height, mp->format);
+
+#ifndef PLANB_GSCANLINE
+		if(pb->gnorm_switch[fr])
+			nsize = 0;
+		if (nsize < osize) {
+			for(i = pb->gbuf_idx[fr]; osize > 0; i++) {
+				memset((void *)pb->rawbuf[i], 0, PAGE_SIZE);
+				osize -= PAGE_SIZE;
+			}
+		}
+		for(i = pb->l_fr_addr_idx[fr]; i < pb->l_fr_addr_idx[fr]
+							+ pb->lnum[fr]; i++)
+			memset((void *)pb->rawbuf[i], 0, PAGE_SIZE);
+#else
+/* XXX TODO */
+/*
+		if(pb->gnorm_switch[fr])
+			memset((void *)pb->gbuffer[fr], 0,
+					pb->gbytes_per_line * pb->gheight[fr]);
+		else {
+			if(mp->
+			for(i = 0; i < pb->gheight[fr]; i++) {
+				memset((void *)(pb->gbuffer[fr]
+					+ pb->gbytes_per_line * i
+			}
+		}
+*/
+#endif
+		pb->gwidth[fr] = mp->width;
+		pb->gheight[fr] = mp->height;
+		pb->gfmt[fr] = format;
+		pb->last_cmd[fr] = setup_grab_cmd(fr, pb);
+		planb_pre_capture(fr, pb->gfmt[fr], pb); /* gfmt = bpp */
+		pb->need_pre_capture[fr] = 1;
+		pb->gnorm_switch[fr] = 0;
+	} else
+		pb->need_pre_capture[fr] = 0;
+	pb->frame_stat[fr] = GBUFFER_GRABBING;
+	if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) {
+
+		IDEBUG("PlanB: ch1 inactive, initiating grabbing\n");
+
+		planb_dbdma_stop(&pb->planb_base->ch1);
+		if(pb->need_pre_capture[fr]) {
+
+			IDEBUG("PlanB: padding pre-capture sequence\n");
+
+			out_le32 (&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->pre_cmd[fr]));
+		} else {
+			tab_cmd_dbdma(pb->last_cmd[fr], DBDMA_STOP, 0);
+			tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0);
+		/* let's be on the safe side. here is not timing critical. */
+			tab_cmd_dbdma((pb->cap_cmd[fr] + 1), DBDMA_NOP, 0);
+			out_le32 (&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->cap_cmd[fr]));
+		}
+		planb_dbdma_restart(&pb->planb_base->ch1);
+		pb->last_fr = fr;
+	} else {
+		int i;
+
+		IDEBUG("PlanB: ch1 active, grabbing being queued\n");
+
+		if((pb->last_fr == -1) || ((pb->last_fr == -2) &&
+						overlay_is_active(pb))) {
+
+			IDEBUG("PlanB: overlay is active, grabbing defered\n");
+
+			tab_cmd_dbdma(pb->last_cmd[fr],
+					DBDMA_NOP | BR_ALWAYS,
+					virt_to_bus(pb->ch1_cmd));
+			if(pb->need_pre_capture[fr]) {
+
+				IDEBUG("PlanB: padding pre-capture sequence\n");
+
+				tab_cmd_store(pb->pre_cmd[fr],
+				    virt_to_bus(&pb->overlay_last1->cmd_dep),
+						virt_to_bus(pb->ch1_cmd));
+				eieio();
+				out_le32 (&pb->overlay_last1->cmd_dep,
+						virt_to_bus(pb->pre_cmd[fr]));
+			} else {
+				tab_cmd_store(pb->cap_cmd[fr],
+				    virt_to_bus(&pb->overlay_last1->cmd_dep),
+						virt_to_bus(pb->ch1_cmd));
+				tab_cmd_dbdma((pb->cap_cmd[fr] + 1),
+								DBDMA_NOP, 0);
+				eieio();
+				out_le32 (&pb->overlay_last1->cmd_dep,
+						virt_to_bus(pb->cap_cmd[fr]));
+			}
+			for(i = 0; overlay_is_active(pb) && i < 999; i++)
+				IDEBUG("PlanB: waiting for overlay done\n");
+			tab_cmd_dbdma(pb->ch1_cmd, DBDMA_NOP, 0);
+			pb->prev_last_fr = fr;
+			pb->last_fr = -2;
+		} else if(pb->last_fr == -2) {
+
+			IDEBUG("PlanB: mixed mode detected, grabbing"
+				" will be done before activating overlay\n");
+
+			tab_cmd_dbdma(pb->ch1_cmd, DBDMA_NOP, 0);
+			if(pb->need_pre_capture[fr]) {
+
+				IDEBUG("PlanB: padding pre-capture sequence\n");
+
+				tab_cmd_dbdma(pb->last_cmd[pb->prev_last_fr],
+						DBDMA_NOP | BR_ALWAYS,
+						virt_to_bus(pb->pre_cmd[fr]));
+				eieio();
+			} else {
+				tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0);
+				if(pb->gwidth[pb->prev_last_fr] !=
+								pb->gwidth[fr]
+					|| pb->gheight[pb->prev_last_fr] !=
+								pb->gheight[fr]
+					|| pb->gfmt[pb->prev_last_fr] !=
+								pb->gfmt[fr])
+					tab_cmd_dbdma((pb->cap_cmd[fr] + 1),
+								DBDMA_NOP, 0);
+				else
+					tab_cmd_dbdma((pb->cap_cmd[fr] + 1),
+					    DBDMA_NOP | BR_ALWAYS,
+					    virt_to_bus(pb->cap_cmd[fr] + 16));
+				tab_cmd_dbdma(pb->last_cmd[pb->prev_last_fr],
+						DBDMA_NOP | BR_ALWAYS,
+						virt_to_bus(pb->cap_cmd[fr]));
+				eieio();
+			}
+			tab_cmd_dbdma(pb->last_cmd[fr],
+					DBDMA_NOP | BR_ALWAYS,
+					virt_to_bus(pb->ch1_cmd));
+			eieio();
+			pb->prev_last_fr = fr;
+			pb->last_fr = -2;
+		} else {
+
+			IDEBUG("PlanB: active grabbing session detected\n");
+
+			if(pb->need_pre_capture[fr]) {
+
+				IDEBUG("PlanB: padding pre-capture sequence\n");
+
+				tab_cmd_dbdma(pb->last_cmd[pb->last_fr],
+						DBDMA_NOP | BR_ALWAYS,
+						virt_to_bus(pb->pre_cmd[fr]));
+				eieio();
+			} else {
+				tab_cmd_dbdma(pb->last_cmd[fr], DBDMA_STOP, 0);
+				tab_cmd_dbdma(pb->cap_cmd[fr], DBDMA_NOP, 0);
+				if(pb->gwidth[pb->last_fr] != pb->gwidth[fr]
+					|| pb->gheight[pb->last_fr] !=
+								pb->gheight[fr]
+					|| pb->gfmt[pb->last_fr] !=
+								pb->gfmt[fr])
+					tab_cmd_dbdma((pb->cap_cmd[fr] + 1),
+								DBDMA_NOP, 0);
+				else
+					tab_cmd_dbdma((pb->cap_cmd[fr] + 1),
+					    DBDMA_NOP | BR_ALWAYS,
+					    virt_to_bus(pb->cap_cmd[fr] + 16));
+				tab_cmd_dbdma(pb->last_cmd[pb->last_fr],
+						DBDMA_NOP | BR_ALWAYS,
+						virt_to_bus(pb->cap_cmd[fr]));
+				eieio();
+			}
+			pb->last_fr = fr;
+		}
+		if(!(ACTIVE & in_le32(&pb->planb_base->ch1.status))) {
+
+			IDEBUG("PlanB: became inactive in the mean time..."
+				"reactivating\n");
+
+			planb_dbdma_stop(&pb->planb_base->ch1);
+			out_le32 (&pb->planb_base->ch1.cmdptr,
+						virt_to_bus(pb->cap_cmd[fr]));
+			planb_dbdma_restart(&pb->planb_base->ch1);
+		}
+	}
+	pb->grabbing++;
+	planb_unlock(pb);
+
+	return 0;
+}
+
+static void planb_pre_capture(int fr, int bpp, struct planb *pb)
+{
+	volatile struct dbdma_cmd *c1 = pb->pre_cmd[fr];
+	int interlace = (pb->gheight[fr] > pb->maxlines/2)? 1: 0;
+
+	tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
+	if((c1 = cmd_geo_setup(c1, pb->gwidth[fr], pb->gheight[fr], interlace,
+						bpp, 0, pb)) == NULL) {
+		printk(KERN_WARNING "PlanB: encountered some problems\n");
+		tab_cmd_dbdma(pb->pre_cmd[fr] + 1, DBDMA_STOP, 0);
+		return;
+	}
+	/* Sync to even field */
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.wait_sel),
+		PLANB_SET(FIELD_SYNC));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(ODD_FIELD));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
+	tab_cmd_dbdma(c1++, DBDMA_NOP | INTR_ALWAYS, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(DMA_ABORT));
+	/* For non-interlaced, we use even fields only */
+	if (pb->gheight[fr] <= pb->maxlines/2)
+		goto cmd_tab_data_end;
+	/* Sync to odd field */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(ODD_FIELD));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(DMA_ABORT));
+cmd_tab_data_end:
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, virt_to_bus(pb->cap_cmd[fr]));
+
+	eieio();
+}
+
+static volatile struct dbdma_cmd *setup_grab_cmd(int fr, struct planb *pb)
+{
+	int		i, bpp, count, nlines, stepsize, interlace;
+#ifdef PLANB_GSCANLINE
+	int		scanline;
+#else
+	int		nlpp, leftover1;
+	unsigned long	base;
+#endif
+	unsigned long	jump;
+	int		pagei;
+	volatile struct dbdma_cmd *c1;
+	volatile struct dbdma_cmd *jump_addr;
+
+	c1 = pb->cap_cmd[fr];
+	interlace = (pb->gheight[fr] > pb->maxlines/2)? 1: 0;
+	bpp = pb->gfmt[fr];	/* gfmt = bpp */
+	count = bpp * pb->gwidth[fr];
+	nlines = pb->gheight[fr];
+#ifdef PLANB_GSCANLINE
+	scanline = pb->gbytes_per_line;
+#else
+	pb->lsize[fr] = count;
+	pb->lnum[fr] = 0;
+#endif
+
+	/* Do video in: */
+
+	/* Preamble commands: */
+	tab_cmd_dbdma(c1++, DBDMA_NOP, 0);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, virt_to_bus(c1 + 16)); c1++;
+	if((c1 = cmd_geo_setup(c1, pb->gwidth[fr], pb->gheight[fr], interlace,
+						bpp, 0, pb)) == NULL) {
+		printk(KERN_WARNING "PlanB: encountered serious problems\n");
+		tab_cmd_dbdma(pb->cap_cmd[fr] + 1, DBDMA_STOP, 0);
+		return (pb->cap_cmd[fr] + 2);
+	}
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.wait_sel),
+		PLANB_SET(FIELD_SYNC));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(ODD_FIELD));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFSET, virt_to_bus(c1-3)); c1++;
+	tab_cmd_dbdma(c1++, DBDMA_NOP | INTR_ALWAYS, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(DMA_ABORT));
+
+	if (interlace) {
+		stepsize = 2;
+		jump_addr = c1 + TAB_FACTOR * (nlines + 1) / 2;
+	} else {
+		stepsize = 1;
+		jump_addr = c1 + TAB_FACTOR * nlines;
+	}
+	jump = virt_to_bus(jump_addr);
+
+	/* even field data: */
+
+	pagei = pb->gbuf_idx[fr];
+#ifdef PLANB_GSCANLINE
+	for (i = 0; i < nlines; i += stepsize) {
+		tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
+					virt_to_bus(pb->rawbuf[pagei
+					+ i * scanline / PAGE_SIZE]), jump);
+	}
+#else
+	i = 0;
+	leftover1 = 0;
+	do {
+	    int j;
+
+	    base = virt_to_bus(pb->rawbuf[pagei]);
+	    nlpp = (PAGE_SIZE - leftover1) / count / stepsize;
+	    for(j = 0; j < nlpp && i < nlines; j++, i += stepsize, c1++)
+		tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET,
+			  count, base + count * j * stepsize + leftover1, jump);
+	    if(i < nlines) {
+		int lov0 = PAGE_SIZE - count * nlpp * stepsize - leftover1;
+
+		if(lov0 == 0)
+		    leftover1 = 0;
+		else {
+		    if(lov0 >= count) {
+			tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count, base
+				+ count * nlpp * stepsize + leftover1, jump);
+		    } else {
+			pb->l_to_addr[fr][pb->lnum[fr]] = pb->rawbuf[pagei]
+					+ count * nlpp * stepsize + leftover1;
+			pb->l_to_next_idx[fr][pb->lnum[fr]] = pagei + 1;
+			pb->l_to_next_size[fr][pb->lnum[fr]] = count - lov0;
+			tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
+				virt_to_bus(pb->rawbuf[pb->l_fr_addr_idx[fr]
+						+ pb->lnum[fr]]), jump);
+			if(++pb->lnum[fr] > MAX_LNUM)
+				pb->lnum[fr]--;
+		    }
+		    leftover1 = count * stepsize - lov0;
+		    i += stepsize;
+		}
+	    }
+	    pagei++;
+	} while(i < nlines);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, jump);
+	c1 = jump_addr;
+#endif /* PLANB_GSCANLINE */
+
+	/* For non-interlaced, we use even fields only */
+	if (!interlace)
+		goto cmd_tab_data_end;
+
+	/* Sync to odd field */
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFCLR, 0);
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(ODD_FIELD));
+	tab_cmd_dbdma(c1++, DBDMA_NOP | WAIT_IFSET, 0);
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_IFCLR, virt_to_bus(c1-3)); c1++;
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->ch1.br_sel),
+		PLANB_SET(DMA_ABORT));
+	
+	/* odd field data: */
+	jump_addr = c1 + TAB_FACTOR * nlines / 2;
+	jump = virt_to_bus(jump_addr);
+#ifdef PLANB_GSCANLINE
+	for (i = 1; i < nlines; i += stepsize) {
+		tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
+					virt_to_bus(pb->rawbuf[pagei
+					+ i * scanline / PAGE_SIZE]), jump);
+	}
+#else
+	i = 1;
+	leftover1 = 0;
+	pagei = pb->gbuf_idx[fr];
+	if(nlines <= 1)
+	    goto skip;
+	do {
+	    int j;
+
+	    base = virt_to_bus(pb->rawbuf[pagei]);
+	    nlpp = (PAGE_SIZE - leftover1) / count / stepsize;
+	    if(leftover1 >= count) {
+		tab_cmd_gen(c1++, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
+						base + leftover1 - count, jump);
+		i += stepsize;
+	    }
+	    for(j = 0; j < nlpp && i < nlines; j++, i += stepsize, c1++)
+		tab_cmd_gen(c1, INPUT_MORE | KEY_STREAM0 | BR_IFSET, count,
+			base + count * (j * stepsize + 1) + leftover1, jump);
+	    if(i < nlines) {
+		int lov0 = PAGE_SIZE - count * nlpp * stepsize - leftover1;
+
+		if(lov0 == 0)
+		    leftover1 = 0;
+		else {
+		    if(lov0 > count) {
+			pb->l_to_addr[fr][pb->lnum[fr]] = pb->rawbuf[pagei]
+				+ count * (nlpp * stepsize + 1) + leftover1;
+			pb->l_to_next_idx[fr][pb->lnum[fr]] = pagei + 1;
+			pb->l_to_next_size[fr][pb->lnum[fr]] = count * stepsize
+									- lov0;
+			tab_cmd_gen(c1++, INPUT_MORE | BR_IFSET, count,
+				virt_to_bus(pb->rawbuf[pb->l_fr_addr_idx[fr]
+							+ pb->lnum[fr]]), jump);
+			if(++pb->lnum[fr] > MAX_LNUM)
+				pb->lnum[fr]--;
+			i += stepsize;
+		    }
+		    leftover1 = count * stepsize - lov0;
+		}
+	    }
+	    pagei++;
+	} while(i < nlines);
+skip:
+	tab_cmd_dbdma(c1, DBDMA_NOP | BR_ALWAYS, jump);
+	c1 = jump_addr;
+#endif /* PLANB_GSCANLINE */
+
+cmd_tab_data_end:
+	tab_cmd_store(c1++, (unsigned)(&pb->planb_base_phys->intr_stat),
+			(fr << 9) | PLANB_FRM_IRQ | PLANB_GEN_IRQ);
+	/* stop it */
+	tab_cmd_dbdma(c1, DBDMA_STOP, 0);
+
+	eieio();
+	return c1;
+}
+
+static void planb_irq(int irq, void *dev_id, struct pt_regs * regs)
+{
+	unsigned int stat, astat;
+	struct planb *pb = (struct planb *)dev_id;
+
+	IDEBUG("PlanB: planb_irq()\n");
+
+	/* get/clear interrupt status bits */
+	eieio();
+	stat = in_le32(&pb->planb_base->intr_stat);
+	astat = stat & pb->intr_mask;
+	out_le32(&pb->planb_base->intr_stat, PLANB_FRM_IRQ
+					& ~astat & stat & ~PLANB_GEN_IRQ);
+	IDEBUG("PlanB: stat = %X, astat = %X\n", stat, astat);
+
+	if(astat & PLANB_FRM_IRQ) {
+		unsigned int fr = stat >> 9;
+#ifndef PLANB_GSCANLINE
+		int i;
+#endif
+		IDEBUG("PlanB: PLANB_FRM_IRQ\n");
+
+		pb->gcount++;
+
+		IDEBUG("PlanB: grab %d: fr = %d, gcount = %d\n",
+				pb->grabbing, fr, pb->gcount);
+#ifndef PLANB_GSCANLINE
+		IDEBUG("PlanB: %d * %d bytes are being copied over\n",
+				pb->lnum[fr], pb->lsize[fr]);
+		for(i = 0; i < pb->lnum[fr]; i++) {
+			int first = pb->lsize[fr] - pb->l_to_next_size[fr][i];
+
+			memcpy(pb->l_to_addr[fr][i],
+				pb->rawbuf[pb->l_fr_addr_idx[fr] + i],
+				first);
+			memcpy(pb->rawbuf[pb->l_to_next_idx[fr][i]],
+				pb->rawbuf[pb->l_fr_addr_idx[fr] + i] + first,
+						pb->l_to_next_size[fr][i]);
+		}
+#endif
+		pb->frame_stat[fr] = GBUFFER_DONE;
+		pb->grabbing--;
+		wake_up_interruptible(&pb->capq);
+		return;
+	}
+	/* incorrect interrupts? */
+	pb->intr_mask = PLANB_CLR_IRQ;
+	out_le32(&pb->planb_base->intr_stat, PLANB_CLR_IRQ);
+	printk(KERN_ERR "PlanB: IRQ lockup, cleared intrrupts"
+							" unconditionally\n");
+}
+
+/*******************************
+ * Device Operations functions *
+ *******************************/
+
+static int planb_open(struct video_device *dev, int mode)
+{
+	struct planb *pb = (struct planb *)dev;
+
+	if (pb->user == 0) {
+		int err;
+		if((err = planb_prepare_open(pb)) != 0)
+			return err;
+	}
+	pb->user++;
+
+	DEBUG("PlanB: device opened\n");
+	return 0;   
+}
+
+static void planb_close(struct video_device *dev)
+{
+	struct planb *pb = (struct planb *)dev;
+
+	if(pb->user < 1) /* ??? */
+		return;
+	planb_lock(pb);
+	if (pb->user == 1) {
+		if (pb->overlay) {
+			planb_dbdma_stop(&pb->planb_base->ch2);
+			planb_dbdma_stop(&pb->planb_base->ch1);
+			pb->overlay = 0;
+		}
+		planb_prepare_close(pb);
+	}
+	pb->user--;
+	planb_unlock(pb);
+
+	DEBUG("PlanB: device closed\n");
+}
+
+static long planb_read(struct video_device *v, char *buf, unsigned long count,
+				int nonblock)
+{
+	DEBUG("planb: read request\n");
+	return -EINVAL;
+}
+
+static long planb_write(struct video_device *v, const char *buf,
+				unsigned long count, int nonblock)
+{
+	DEBUG("planb: write request\n");
+	return -EINVAL;
+}
+
+static int planb_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+	struct planb *pb=(struct planb *)dev;
+  	
+	switch (cmd)
+	{	
+		case VIDIOCGCAP:
+		{
+			struct video_capability b;
+
+			DEBUG("PlanB: IOCTL VIDIOCGCAP\n");
+
+			strcpy (b.name, pb->video_dev.name);
+			b.type = VID_TYPE_OVERLAY | VID_TYPE_CLIPPING |
+				 VID_TYPE_FRAMERAM | VID_TYPE_SCALES |
+				 VID_TYPE_CAPTURE;
+			b.channels = 2;	/* composite & svhs */
+			b.audios = 0;
+			b.maxwidth = PLANB_MAXPIXELS;
+                        b.maxheight = PLANB_MAXLINES;
+                        b.minwidth = 32; /* wild guess */
+                        b.minheight = 32;
+                        if (copy_to_user(arg,&b,sizeof(b)))
+                                return -EFAULT;
+			return 0;
+		}
+		case VIDIOCSFBUF:
+		{
+                        struct video_buffer v;
+			unsigned short bpp;
+			unsigned int fmt;
+
+			DEBUG("PlanB: IOCTL VIDIOCSFBUF\n");
+
+                        if (!capable(CAP_SYS_ADMIN)
+			|| !capable(CAP_SYS_RAWIO))
+                                return -EPERM;
+                        if (copy_from_user(&v, arg,sizeof(v)))
+                                return -EFAULT;
+			planb_lock(pb);
+			switch(v.depth) {
+			case 8:
+				bpp = 1;
+				fmt = PLANB_GRAY;
+				break;
+			case 15:
+			case 16:
+				bpp = 2;
+				fmt = PLANB_COLOUR15;
+				break;
+			case 24:
+			case 32:
+				bpp = 4;
+				fmt = PLANB_COLOUR32;
+				break;
+			default:
+				planb_unlock(pb);
+                                return -EINVAL;
+			}
+			if (bpp * v.width > v.bytesperline) {
+				planb_unlock(pb);
+				return -EINVAL;
+			}
+			pb->win.bpp = bpp;
+			pb->win.color_fmt = fmt;
+			pb->frame_buffer_phys = (unsigned long) v.base;
+			pb->win.sheight = v.height;
+			pb->win.swidth = v.width;
+			pb->picture.depth = pb->win.depth = v.depth;
+			pb->win.bpl = pb->win.bpp * pb->win.swidth;
+			pb->win.pad = v.bytesperline - pb->win.bpl;
+
+                        DEBUG("PlanB: Display at %p is %d by %d, bytedepth %d,"
+				" bpl %d (+ %d)\n", v.base, v.width,v.height,
+				pb->win.bpp, pb->win.bpl, pb->win.pad);
+
+			pb->cmd_buff_inited = 0;
+			if(pb->overlay) {
+				suspend_overlay(pb);
+				fill_cmd_buff(pb);
+				resume_overlay(pb);
+			}
+			planb_unlock(pb);
+			return 0;		
+		}
+		case VIDIOCGFBUF:
+		{
+                        struct video_buffer v;
+
+			DEBUG("PlanB: IOCTL VIDIOCGFBUF\n");
+
+			v.base = (void *)pb->frame_buffer_phys;
+			v.height = pb->win.sheight;
+			v.width = pb->win.swidth;
+			v.depth = pb->win.depth;
+			v.bytesperline = pb->win.bpl + pb->win.pad;
+			if (copy_to_user(arg, &v, sizeof(v)))
+                                return -EFAULT;
+			return 0;
+		}
+		case VIDIOCCAPTURE:
+		{
+			int i;
+
+                        if(copy_from_user(&i, arg, sizeof(i)))
+                                return -EFAULT;
+			if(i==0) {
+				DEBUG("PlanB: IOCTL VIDIOCCAPTURE Stop\n");
+
+				if (!(pb->overlay))
+					return 0;
+				planb_lock(pb);
+				pb->overlay = 0;
+				overlay_stop(pb);
+				planb_unlock(pb);
+			} else {
+				DEBUG("PlanB: IOCTL VIDIOCCAPTURE Start\n");
+
+				if (pb->frame_buffer_phys == 0 ||
+					  pb->win.width == 0 ||
+					  pb->win.height == 0)
+					return -EINVAL;
+				if (pb->overlay)
+					return 0;
+				planb_lock(pb);
+				pb->overlay = 1;
+				if(!(pb->cmd_buff_inited))
+					fill_cmd_buff(pb);
+				overlay_start(pb);
+				planb_unlock(pb);
+			}
+			return 0;
+		}
+		case VIDIOCGCHAN:
+		{
+			struct video_channel v;
+
+			DEBUG("PlanB: IOCTL VIDIOCGCHAN\n");
+
+			if(copy_from_user(&v, arg,sizeof(v)))
+				return -EFAULT;
+			v.flags = 0;
+			v.tuners = 0;
+			v.type = VIDEO_TYPE_CAMERA;
+			v.norm = pb->win.norm;
+			switch(v.channel)
+			{
+			case 0:
+				strcpy(v.name,"Composite");
+				break;
+			case 1:
+				strcpy(v.name,"SVHS");
+				break;
+			default:
+				return -EINVAL;
+				break;
+			}
+			if(copy_to_user(arg,&v,sizeof(v)))
+				return -EFAULT;
+
+			return 0;
+		}
+		case VIDIOCSCHAN:
+		{
+			struct video_channel v;
+
+			DEBUG("PlanB: IOCTL VIDIOCSCHAN\n");
+
+			if(copy_from_user(&v, arg, sizeof(v)))
+				return -EFAULT;
+
+			if (v.norm != pb->win.norm) {
+				int i, maxlines;
+
+				switch (v.norm)
+				{
+				case VIDEO_MODE_PAL:
+				case VIDEO_MODE_SECAM:
+					maxlines = PLANB_MAXLINES;
+					break;
+				case VIDEO_MODE_NTSC:
+					maxlines = PLANB_NTSC_MAXLINES;
+					break;
+				default:
+					return -EINVAL;
+					break;
+				}
+				planb_lock(pb);
+				/* empty the grabbing queue */
+				wait_event(pb->capq, !pb->grabbing);
+				pb->maxlines = maxlines;
+				pb->win.norm = v.norm;
+				/* Stop overlay if running */
+				suspend_overlay(pb);
+				for(i = 0; i < MAX_GBUFFERS; i++)
+					pb->gnorm_switch[i] = 1;
+				/* I know it's an overkill, but.... */
+				fill_cmd_buff(pb);
+				/* ok, now init it accordingly */
+				saa_init_regs (pb);
+				/* restart overlay if it was running */
+				resume_overlay(pb);
+				planb_unlock(pb);
+			}
+
+			switch(v.channel)
+			{
+			case 0:	/* Composite	*/
+				saa_set (SAA7196_IOCC,
+					((saa_regs[pb->win.norm][SAA7196_IOCC] &
+					  ~7) | 3), pb);
+				break;
+			case 1:	/* SVHS		*/
+				saa_set (SAA7196_IOCC,
+					((saa_regs[pb->win.norm][SAA7196_IOCC] &
+					  ~7) | 4), pb);
+				break;
+			default:
+				return -EINVAL;
+				break;
+			}
+
+			return 0;
+		}
+		case VIDIOCGPICT:
+		{
+			struct video_picture vp = pb->picture;
+
+			DEBUG("PlanB: IOCTL VIDIOCGPICT\n");
+
+			switch(pb->win.color_fmt) {
+			case PLANB_GRAY:
+				vp.palette = VIDEO_PALETTE_GREY;
+			case PLANB_COLOUR15:
+				vp.palette = VIDEO_PALETTE_RGB555;
+				break;
+			case PLANB_COLOUR32:
+				vp.palette = VIDEO_PALETTE_RGB32;
+				break;
+			default:
+				vp.palette = 0;
+				break;
+			}
+
+			if(copy_to_user(arg,&vp,sizeof(vp)))
+				return -EFAULT;
+			return 0;
+		}
+		case VIDIOCSPICT:
+		{
+			struct video_picture vp;
+
+			DEBUG("PlanB: IOCTL VIDIOCSPICT\n");
+
+			if(copy_from_user(&vp,arg,sizeof(vp)))
+				return -EFAULT;
+			pb->picture = vp;
+			/* Should we do sanity checks here? */
+			saa_set (SAA7196_BRIG, (unsigned char)
+			    ((pb->picture.brightness) >> 8), pb);
+			saa_set (SAA7196_HUEC, (unsigned char)
+			    ((pb->picture.hue) >> 8) ^ 0x80, pb);
+			saa_set (SAA7196_CSAT, (unsigned char)
+			    ((pb->picture.colour) >> 9), pb);
+			saa_set (SAA7196_CONT, (unsigned char)
+			    ((pb->picture.contrast) >> 9), pb);
+
+			return 0;
+		}
+		case VIDIOCSWIN:
+		{
+			struct video_window	vw;
+			struct video_clip	clip;
+			int 			i;
+			
+			DEBUG("PlanB: IOCTL VIDIOCSWIN\n");
+
+			if(copy_from_user(&vw,arg,sizeof(vw)))
+				return -EFAULT;
+
+			planb_lock(pb);
+			/* Stop overlay if running */
+			suspend_overlay(pb);
+			pb->win.interlace = (vw.height > pb->maxlines/2)? 1: 0;
+			if (pb->win.x != vw.x ||
+			    pb->win.y != vw.y ||
+			    pb->win.width != vw.width ||
+			    pb->win.height != vw.height ||
+			    !pb->cmd_buff_inited) {
+				pb->win.x = vw.x;
+				pb->win.y = vw.y;
+				pb->win.width = vw.width;
+				pb->win.height = vw.height;
+				fill_cmd_buff(pb);
+			}
+			/* Reset clip mask */
+			memset ((void *) pb->mask, 0xff, (pb->maxlines
+					* ((PLANB_MAXPIXELS + 7) & ~7)) / 8);
+			/* Add any clip rects */
+			for (i = 0; i < vw.clipcount; i++) {
+				if (copy_from_user(&clip, vw.clips + i,
+						sizeof(struct video_clip)))
+					return -EFAULT;
+				add_clip(pb, &clip);
+			}
+			/* restart overlay if it was running */
+			resume_overlay(pb);
+			planb_unlock(pb);
+			return 0;
+		}
+		case VIDIOCGWIN:
+		{
+			struct video_window vw;
+
+			DEBUG("PlanB: IOCTL VIDIOCGWIN\n");
+
+			vw.x=pb->win.x;
+			vw.y=pb->win.y;
+			vw.width=pb->win.width;
+			vw.height=pb->win.height;
+			vw.chromakey=0;
+			vw.flags=0;
+			if(pb->win.interlace)
+				vw.flags|=VIDEO_WINDOW_INTERLACE;
+			if(copy_to_user(arg,&vw,sizeof(vw)))
+				return -EFAULT;
+			return 0;
+		}
+	        case VIDIOCSYNC: {
+			int i;
+
+			IDEBUG("PlanB: IOCTL VIDIOCSYNC\n");
+
+			if(copy_from_user((void *)&i,arg,sizeof(int)))
+				return -EFAULT;
+
+			IDEBUG("PlanB: sync to frame %d\n", i);
+
+                        if(i > (MAX_GBUFFERS - 1) || i < 0)
+                                return -EINVAL;
+chk_grab:
+                        switch (pb->frame_stat[i]) {
+                        case GBUFFER_UNUSED:
+                                return -EINVAL;
+			case GBUFFER_GRABBING:
+				IDEBUG("PlanB: waiting for grab"
+							" done (%d)\n", i);
+ 			        interruptible_sleep_on(&pb->capq);
+				if(signal_pending(current))
+					return -EINTR;
+				goto chk_grab;
+                        case GBUFFER_DONE:
+                                pb->frame_stat[i] = GBUFFER_UNUSED;
+                                break;
+                        }
+                        return 0;
+		}
+
+	        case VIDIOCMCAPTURE:
+		{
+                        struct video_mmap vm;
+			volatile unsigned int status;
+
+			IDEBUG("PlanB: IOCTL VIDIOCMCAPTURE\n");
+
+			if(copy_from_user((void *) &vm,(void *)arg,sizeof(vm)))
+				return -EFAULT;
+                        status = pb->frame_stat[vm.frame];
+                        if (status != GBUFFER_UNUSED)
+                                return -EBUSY;
+
+		        return vgrab(pb, &vm);
+		}
+		
+		case VIDIOCGMBUF:
+		{
+			int i;
+			struct video_mbuf vm;
+
+			DEBUG("PlanB: IOCTL VIDIOCGMBUF\n");
+
+			memset(&vm, 0 , sizeof(vm));
+			vm.size = PLANB_MAX_FBUF * MAX_GBUFFERS;
+			vm.frames = MAX_GBUFFERS;
+			for(i = 0; i<MAX_GBUFFERS; i++)
+				vm.offsets[i] = PLANB_MAX_FBUF * i;
+			if(copy_to_user((void *)arg, (void *)&vm, sizeof(vm)))
+				return -EFAULT;
+			return 0;
+		}
+		
+		case PLANBIOCGSAAREGS:
+		{
+			struct planb_saa_regs preg;
+
+			DEBUG("PlanB: IOCTL PLANBIOCGSAAREGS\n");
+
+			if(copy_from_user(&preg, arg, sizeof(preg)))
+				return -EFAULT;
+			if(preg.addr >= SAA7196_NUMREGS)
+				return -EINVAL;
+			preg.val = saa_regs[pb->win.norm][preg.addr];
+			if(copy_to_user((void *)arg, (void *)&preg,
+								sizeof(preg)))
+				return -EFAULT;
+			return 0;
+		}
+		
+		case PLANBIOCSSAAREGS:
+		{
+			struct planb_saa_regs preg;
+
+			DEBUG("PlanB: IOCTL PLANBIOCSSAAREGS\n");
+
+			if(copy_from_user(&preg, arg, sizeof(preg)))
+				return -EFAULT;
+			if(preg.addr >= SAA7196_NUMREGS)
+				return -EINVAL;
+			saa_set (preg.addr, preg.val, pb);
+			return 0;
+		}
+		
+		case PLANBIOCGSTAT:
+		{
+			struct planb_stat_regs pstat;
+
+			DEBUG("PlanB: IOCTL PLANBIOCGSTAT\n");
+
+			pstat.ch1_stat = in_le32(&pb->planb_base->ch1.status);
+			pstat.ch2_stat = in_le32(&pb->planb_base->ch2.status);
+			pstat.saa_stat0 = saa_status(0, pb);
+			pstat.saa_stat1 = saa_status(1, pb);
+
+			if(copy_to_user((void *)arg, (void *)&pstat,
+							sizeof(pstat)))
+				return -EFAULT;
+			return 0;
+		}
+		
+		case PLANBIOCSMODE: {
+			int v;
+
+			DEBUG("PlanB: IOCTL PLANBIOCSMODE\n");
+
+			if(copy_from_user(&v, arg, sizeof(v)))
+				return -EFAULT;
+
+			switch(v)
+			{
+			case PLANB_TV_MODE:
+				saa_set (SAA7196_STDC,
+					(saa_regs[pb->win.norm][SAA7196_STDC] &
+					  0x7f), pb);
+				break;
+			case PLANB_VTR_MODE:
+				saa_set (SAA7196_STDC,
+					(saa_regs[pb->win.norm][SAA7196_STDC] |
+					  0x80), pb);
+				break;
+			default:
+				return -EINVAL;
+				break;
+			}
+			pb->win.mode = v;
+			return 0;
+		}
+		case PLANBIOCGMODE: {
+			int v=pb->win.mode;
+
+			DEBUG("PlanB: IOCTL PLANBIOCGMODE\n");
+
+			if(copy_to_user(arg,&v,sizeof(v)))
+				return -EFAULT;
+			return 0;
+		}
+#ifdef PLANB_GSCANLINE
+		case PLANBG_GRAB_BPL: {
+			int v=pb->gbytes_per_line;
+
+			DEBUG("PlanB: IOCTL PLANBG_GRAB_BPL\n");
+
+			if(copy_to_user(arg,&v,sizeof(v)))
+				return -EFAULT;
+			return 0;
+		}
+#endif /* PLANB_GSCANLINE */
+		case PLANB_INTR_DEBUG: {
+			int i;
+
+			DEBUG("PlanB: IOCTL PLANB_INTR_DEBUG\n");
+
+			if(copy_from_user(&i, arg, sizeof(i)))
+				return -EFAULT;
+
+			/* avoid hang ups all together */
+			for (i = 0; i < MAX_GBUFFERS; i++) {
+				if(pb->frame_stat[i] == GBUFFER_GRABBING) {
+					pb->frame_stat[i] = GBUFFER_DONE;
+				}
+			}
+			if(pb->grabbing)
+				pb->grabbing--;
+			wake_up_interruptible(&pb->capq);
+			return 0;
+		}
+		case PLANB_INV_REGS: {
+			int i;
+			struct planb_any_regs any;
+
+			DEBUG("PlanB: IOCTL PLANB_INV_REGS\n");
+
+			if(copy_from_user(&any, arg, sizeof(any)))
+				return -EFAULT;
+			if(any.offset < 0 || any.offset + any.bytes > 0x400)
+				return -EINVAL;
+			if(any.bytes > 128)
+				return -EINVAL;
+			for (i = 0; i < any.bytes; i++) {
+				any.data[i] =
+					in_8((unsigned char *)pb->planb_base
+							+ any.offset + i);
+			}
+			if(copy_to_user(arg,&any,sizeof(any)))
+				return -EFAULT;
+			return 0;
+		}
+		default:
+		{
+			DEBUG("PlanB: Unimplemented IOCTL\n");
+			return -ENOIOCTLCMD;
+		}
+	/* Some IOCTLs are currently unsupported on PlanB */
+		case VIDIOCGTUNER: {
+		DEBUG("PlanB: IOCTL VIDIOCGTUNER\n");
+			goto unimplemented; }
+		case VIDIOCSTUNER: {
+		DEBUG("PlanB: IOCTL VIDIOCSTUNER\n");
+			goto unimplemented; }
+		case VIDIOCSFREQ: {
+		DEBUG("PlanB: IOCTL VIDIOCSFREQ\n");
+			goto unimplemented; }
+		case VIDIOCGFREQ: {
+		DEBUG("PlanB: IOCTL VIDIOCGFREQ\n");
+			goto unimplemented; }
+		case VIDIOCKEY: {
+		DEBUG("PlanB: IOCTL VIDIOCKEY\n");
+			goto unimplemented; }
+		case VIDIOCSAUDIO: {
+		DEBUG("PlanB: IOCTL VIDIOCSAUDIO\n");
+			goto unimplemented; }
+		case VIDIOCGAUDIO: {
+		DEBUG("PlanB: IOCTL VIDIOCGAUDIO\n");
+			goto unimplemented; }
+unimplemented:
+		DEBUG("       Unimplemented\n");
+			return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+static int planb_mmap(struct vm_area_struct *vma, struct video_device *dev, const char *adr, unsigned long size)
+{
+	int i;
+	struct planb *pb = (struct planb *)dev;
+        unsigned long start = (unsigned long)adr;
+
+	if (size > MAX_GBUFFERS * PLANB_MAX_FBUF)
+	        return -EINVAL;
+	if (!pb->rawbuf) {
+		int err;
+		if((err=grabbuf_alloc(pb)))
+			return err;
+	}
+	for (i = 0; i < pb->rawbuf_size; i++) {
+		unsigned long pfn;
+
+		pfn = virt_to_phys((void *)pb->rawbuf[i]) >> PAGE_SHIFT;
+		if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, PAGE_SHARED))
+			return -EAGAIN;
+		start += PAGE_SIZE;
+		if (size <= PAGE_SIZE)
+			break;
+		size -= PAGE_SIZE;
+	}
+	return 0;
+}
+
+static struct video_device planb_template=
+{
+	.owner		= THIS_MODULE,
+	.name		= PLANB_DEVICE_NAME,
+	.type		= VID_TYPE_OVERLAY,
+	.hardware	= VID_HARDWARE_PLANB,
+	.open		= planb_open,
+	.close		= planb_close,
+	.read		= planb_read,
+	.write		= planb_write,
+	.ioctl		= planb_ioctl,
+	.mmap		= planb_mmap,	/* mmap? */
+};
+
+static int init_planb(struct planb *pb)
+{
+	unsigned char saa_rev;
+	int i, result;
+
+	memset ((void *) &pb->win, 0, sizeof (struct planb_window));
+	/* Simple sanity check */
+	if(def_norm >= NUM_SUPPORTED_NORM || def_norm < 0) {
+		printk(KERN_ERR "PlanB: Option(s) invalid\n");
+		return -2;
+	}
+	pb->win.norm = def_norm;
+	pb->win.mode = PLANB_TV_MODE;	/* TV mode */
+	pb->win.interlace=1;
+	pb->win.x=0;
+	pb->win.y=0;
+	pb->win.width=768; /* 640 */
+	pb->win.height=576; /* 480 */
+	pb->maxlines=576;
+#if 0
+	btv->win.cropwidth=768; /* 640 */
+	btv->win.cropheight=576; /* 480 */
+	btv->win.cropx=0;
+	btv->win.cropy=0;
+#endif
+	pb->win.pad=0;
+	pb->win.bpp=4;
+	pb->win.depth=32;
+	pb->win.color_fmt=PLANB_COLOUR32;
+	pb->win.bpl=1024*pb->win.bpp;
+	pb->win.swidth=1024;
+	pb->win.sheight=768;
+#ifdef PLANB_GSCANLINE
+	if((pb->gbytes_per_line = PLANB_MAXPIXELS * 4) > PAGE_SIZE
+				|| (pb->gbytes_per_line <= 0))
+		return -3;
+	else {
+		/* page align pb->gbytes_per_line for DMA purpose */
+		for(i = PAGE_SIZE; pb->gbytes_per_line < (i>>1);)
+			i>>=1;
+		pb->gbytes_per_line = i;
+	}
+#endif
+	pb->tab_size = PLANB_MAXLINES + 40;
+	pb->suspend = 0;
+	init_MUTEX(&pb->lock);
+	pb->ch1_cmd = 0;
+	pb->ch2_cmd = 0;
+	pb->mask = 0;
+	pb->priv_space = 0;
+	pb->offset = 0;
+	pb->user = 0;
+	pb->overlay = 0;
+	init_waitqueue_head(&pb->suspendq);
+	pb->cmd_buff_inited = 0;
+	pb->frame_buffer_phys = 0;
+
+	/* Reset DMA controllers */
+	planb_dbdma_stop(&pb->planb_base->ch2);
+	planb_dbdma_stop(&pb->planb_base->ch1);
+
+	saa_rev =  (saa_status(0, pb) & 0xf0) >> 4;
+	printk(KERN_INFO "PlanB: SAA7196 video processor rev. %d\n", saa_rev);
+	/* Initialize the SAA registers in memory and on chip */
+	saa_init_regs (pb);
+
+	/* clear interrupt mask */
+	pb->intr_mask = PLANB_CLR_IRQ;
+
+        result = request_irq(pb->irq, planb_irq, 0, "PlanB", (void *)pb);
+        if (result < 0) {
+	        if (result==-EINVAL)
+	                printk(KERN_ERR "PlanB: Bad irq number (%d) "
+						"or handler\n", (int)pb->irq);
+		else if (result==-EBUSY)
+			printk(KERN_ERR "PlanB: I don't know why, "
+					"but IRQ %d is busy\n", (int)pb->irq);
+		return result;
+	}
+	disable_irq(pb->irq);
+        
+	/* Now add the template and register the device unit. */
+	memcpy(&pb->video_dev,&planb_template,sizeof(planb_template));
+
+	pb->picture.brightness=0x90<<8;
+	pb->picture.contrast = 0x70 << 8;
+	pb->picture.colour = 0x70<<8;
+	pb->picture.hue = 0x8000;
+	pb->picture.whiteness = 0;
+	pb->picture.depth = pb->win.depth;
+
+	pb->frame_stat=NULL;
+	init_waitqueue_head(&pb->capq);
+	for(i=0; i<MAX_GBUFFERS; i++) {
+		pb->gbuf_idx[i] = PLANB_MAX_FBUF * i / PAGE_SIZE;
+		pb->gwidth[i]=0;
+		pb->gheight[i]=0;
+		pb->gfmt[i]=0;
+		pb->cap_cmd[i]=NULL;
+#ifndef PLANB_GSCANLINE
+		pb->l_fr_addr_idx[i] = MAX_GBUFFERS * (PLANB_MAX_FBUF
+						/ PAGE_SIZE + 1) + MAX_LNUM * i;
+		pb->lsize[i] = 0;
+		pb->lnum[i] = 0;
+#endif
+	}
+	pb->rawbuf=NULL;
+	pb->grabbing=0;
+
+	/* enable interrupts */
+	out_le32(&pb->planb_base->intr_stat, PLANB_CLR_IRQ);
+	pb->intr_mask = PLANB_FRM_IRQ;
+	enable_irq(pb->irq);
+
+	if(video_register_device(&pb->video_dev, VFL_TYPE_GRABBER, video_nr)<0)
+		return -1;
+
+	return 0;
+}
+
+/*
+ *	Scan for a PlanB controller, request the irq and map the io memory 
+ */
+
+static int find_planb(void)
+{
+	struct planb		*pb;
+	struct device_node	*planb_devices;
+	unsigned char		dev_fn, confreg, bus;
+	unsigned int		old_base, new_base;
+	unsigned int		irq;
+	struct pci_dev 		*pdev;
+	int rc;
+
+	if (_machine != _MACH_Pmac)
+		return 0;
+
+	planb_devices = find_devices("planb");
+	if (planb_devices == 0) {
+		planb_num=0;
+		printk(KERN_WARNING "PlanB: no device found!\n");
+		return planb_num;
+	}
+
+	if (planb_devices->next != NULL)
+		printk(KERN_ERR "Warning: only using first PlanB device!\n");
+	pb = &planbs[0];
+	planb_num = 1;
+
+        if (planb_devices->n_addrs != 1) {
+                printk (KERN_WARNING "PlanB: expecting 1 address for planb "
+                	"(got %d)", planb_devices->n_addrs);
+		return 0;
+	}
+
+	if (planb_devices->n_intrs == 0) {
+		printk(KERN_WARNING "PlanB: no intrs for device %s\n",
+		       planb_devices->full_name);
+		return 0;
+	} else {
+		irq = planb_devices->intrs[0].line;
+	}
+
+	/* Initialize PlanB's PCI registers */
+
+	/* There is a bug with the way OF assigns addresses
+	   to the devices behind the chaos bridge.
+	   control needs only 0x1000 of space, but decodes only
+	   the upper 16 bits. It therefore occupies a full 64K.
+	   OF assigns the planb controller memory within this space;
+	   so we need to change that here in order to access planb. */
+
+	/* We remap to 0xf1000000 in hope that nobody uses it ! */
+
+	bus = (planb_devices->addrs[0].space >> 16) & 0xff;
+	dev_fn = (planb_devices->addrs[0].space >> 8) & 0xff;
+	confreg = planb_devices->addrs[0].space & 0xff;
+	old_base = planb_devices->addrs[0].address;
+	new_base = 0xf1000000;
+
+	DEBUG("PlanB: Found on bus %d, dev %d, func %d, "
+		"membase 0x%x (base reg. 0x%x)\n",
+		bus, PCI_SLOT(dev_fn), PCI_FUNC(dev_fn), old_base, confreg);
+
+	pdev = pci_find_slot (bus, dev_fn);
+	if (!pdev) {
+		printk(KERN_ERR "planb: cannot find slot\n");
+		goto err_out;
+	}
+
+	/* Enable response in memory space, bus mastering,
+	   use memory write and invalidate */
+	rc = pci_enable_device(pdev);
+	if (rc) {
+		printk(KERN_ERR "planb: cannot enable PCI device %s\n",
+		       pci_name(pdev));
+		goto err_out;
+	}
+	rc = pci_set_mwi(pdev);
+	if (rc) {
+		printk(KERN_ERR "planb: cannot enable MWI on PCI device %s\n",
+		       pci_name(pdev));
+		goto err_out_disable;
+	}
+	pci_set_master(pdev);
+
+	/* Set the new base address */
+	pci_write_config_dword (pdev, confreg, new_base);
+
+	planb_regs = (volatile struct planb_registers *)
+						ioremap (new_base, 0x400);
+	pb->planb_base = planb_regs;
+	pb->planb_base_phys = (struct planb_registers *)new_base;
+	pb->irq	= irq;
+	
+	return planb_num;
+
+err_out_disable:
+	pci_disable_device(pdev);
+err_out:
+	/* FIXME handle error */   /* comment moved from pci_find_slot, above */
+	return 0;
+}
+
+static void release_planb(void)
+{
+	int i;
+	struct planb *pb;
+
+	for (i=0;i<planb_num; i++) 
+	{
+		pb=&planbs[i];
+
+		/* stop and flash DMAs unconditionally */
+		planb_dbdma_stop(&pb->planb_base->ch2);
+		planb_dbdma_stop(&pb->planb_base->ch1);
+
+		/* clear and free interrupts */
+		pb->intr_mask = PLANB_CLR_IRQ;
+		out_le32 (&pb->planb_base->intr_stat, PLANB_CLR_IRQ);
+		free_irq(pb->irq, pb);
+
+		/* make sure all allocated memory are freed */
+		planb_prepare_close(pb);
+
+		printk(KERN_INFO "PlanB: unregistering with v4l\n");
+		video_unregister_device(&pb->video_dev);
+
+		/* note that iounmap() does nothing on the PPC right now */
+		iounmap ((void *)pb->planb_base);
+	}
+}
+
+static int __init init_planbs(void)
+{
+	int i;
+  
+	if (find_planb()<=0)
+		return -EIO;
+
+	for (i=0; i<planb_num; i++) {
+		if (init_planb(&planbs[i])<0) {
+			printk(KERN_ERR "PlanB: error registering device %d"
+							" with v4l\n", i);
+			release_planb();
+			return -EIO;
+		} 
+		printk(KERN_INFO "PlanB: registered device %d with v4l\n", i);
+	}  
+	return 0;
+}
+
+static void __exit exit_planbs(void)
+{
+	release_planb();
+}
+
+module_init(init_planbs);
+module_exit(exit_planbs);