planb.c
/*
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 <linux/mutex.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_param(def_norm, int, 0);
MODULE_PARM_DESC(def_norm, "Default startup norm (0=PAL, 1=NTSC, 2=SECAM)");
module_param(video_nr, int, 0);
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)
{
mutex_lock(&pb->lock);
}
static inline void planb_unlock(struct planb *pb)
{
mutex_unlock(&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;
mutex_init(&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_is(powermac))
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);
