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linux/drivers/media/video/planb.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

2305 lines
61 KiB
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/*
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 <media/v4l2-common.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 *);
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)
{
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);
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