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linux_dsm_epyc7002/drivers/media/video/zr36120.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

2080 lines
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/*
zr36120.c - Zoran 36120/36125 based framegrabbers
Copyright (C) 1998-1999 Pauline Middelink <middelin@polyware.nl>
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.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/signal.h>
#include <linux/wait.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/sched.h>
#include <linux/video_decoder.h>
#include <asm/uaccess.h>
#include "tuner.h"
#include "zr36120.h"
#include "zr36120_mem.h"
/* mark an required function argument unused - lintism */
#define UNUSED(x) (void)(x)
/* sensible default */
#ifndef CARDTYPE
#define CARDTYPE 0
#endif
/* Anybody who uses more than four? */
#define ZORAN_MAX 4
static unsigned int triton1=0; /* triton1 chipset? */
static unsigned int cardtype[ZORAN_MAX]={ [ 0 ... ZORAN_MAX-1 ] = CARDTYPE };
static int video_nr = -1;
static int vbi_nr = -1;
static struct pci_device_id zr36120_pci_tbl[] = {
{ PCI_VENDOR_ID_ZORAN,PCI_DEVICE_ID_ZORAN_36120,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, zr36120_pci_tbl);
MODULE_AUTHOR("Pauline Middelink <middelin@polyware.nl>");
MODULE_DESCRIPTION("Zoran ZR36120 based framegrabber");
MODULE_LICENSE("GPL");
module_param(triton1, uint, 0);
module_param_array(cardtype, uint, NULL, 0);
module_param(video_nr, int, 0);
module_param(vbi_nr, int, 0);
static int zoran_cards;
static struct zoran zorans[ZORAN_MAX];
/*
* the meaning of each element can be found in zr36120.h
* Determining the value of gpdir/gpval can be tricky. The
* best way is to run the card under the original software
* and read the values from the general purpose registers
* 0x28 and 0x2C. How you do that is left as an exercise
* to the impatient reader :)
*/
#define T 1 /* to separate the bools from the ints */
#define F 0
static struct tvcard tvcards[] = {
/* reported working by <middelin@polyware.nl> */
/*0*/ { "Trust Victor II",
2, 0, T, T, T, T, 0x7F, 0x80, { 1, SVHS(6) }, { 0 } },
/* reported working by <Michael.Paxton@aihw.gov.au> */
/*1*/ { "Aitech WaveWatcher TV-PCI",
3, 0, T, F, T, T, 0x7F, 0x80, { 1, TUNER(3), SVHS(6) }, { 0 } },
/* reported working by ? */
/*2*/ { "Genius Video Wonder PCI Video Capture Card",
2, 0, T, T, T, T, 0x7F, 0x80, { 1, SVHS(6) }, { 0 } },
/* reported working by <Pascal.Gabriel@wanadoo.fr> */
/*3*/ { "Guillemot Maxi-TV PCI",
2, 0, T, T, T, T, 0x7F, 0x80, { 1, SVHS(6) }, { 0 } },
/* reported working by "Craig Whitmore <lennon@igrin.co.nz> */
/*4*/ { "Quadrant Buster",
3, 3, T, F, T, T, 0x7F, 0x80, { SVHS(1), TUNER(2), 3 }, { 1, 2, 3 } },
/* a debug entry which has all inputs mapped */
/*5*/ { "ZR36120 based framegrabber (all inputs enabled)",
6, 0, T, T, T, T, 0x7F, 0x80, { 1, 2, 3, 4, 5, 6 }, { 0 } }
};
#undef T
#undef F
#define NRTVCARDS (sizeof(tvcards)/sizeof(tvcards[0]))
#ifdef __sparc__
#define ENDIANESS 0
#else
#define ENDIANESS ZORAN_VFEC_LE
#endif
static struct { const char name[8]; uint mode; uint bpp; } palette2fmt[] = {
/* n/a */ { "n/a", 0, 0 },
/* GREY */ { "GRAY", 0, 0 },
/* HI240 */ { "HI240", 0, 0 },
/* RGB565 */ { "RGB565", ZORAN_VFEC_RGB_RGB565|ENDIANESS, 2 },
/* RGB24 */ { "RGB24", ZORAN_VFEC_RGB_RGB888|ENDIANESS|ZORAN_VFEC_PACK24, 3 },
/* RGB32 */ { "RGB32", ZORAN_VFEC_RGB_RGB888|ENDIANESS, 4 },
/* RGB555 */ { "RGB555", ZORAN_VFEC_RGB_RGB555|ENDIANESS, 2 },
/* YUV422 */ { "YUV422", ZORAN_VFEC_RGB_YUV422|ENDIANESS, 2 },
/* YUYV */ { "YUYV", 0, 0 },
/* UYVY */ { "UYVY", 0, 0 },
/* YUV420 */ { "YUV420", 0, 0 },
/* YUV411 */ { "YUV411", 0, 0 },
/* RAW */ { "RAW", 0, 0 },
/* YUV422P */ { "YUV422P", 0, 0 },
/* YUV411P */ { "YUV411P", 0, 0 }};
#define NRPALETTES (sizeof(palette2fmt)/sizeof(palette2fmt[0]))
#undef ENDIANESS
/* ----------------------------------------------------------------------- */
/* ZORAN chipset detector */
/* shamelessly stolen from bttv.c */
/* Reason for beeing here: we need to detect if we are running on a */
/* Triton based chipset, and if so, enable a certain bit */
/* ----------------------------------------------------------------------- */
static
void __init handle_chipset(void)
{
/* Just in case some nut set this to something dangerous */
if (triton1)
triton1 = ZORAN_VDC_TRICOM;
if (pci_pci_problems & PCIPCI_TRITON) {
printk(KERN_INFO "zoran: Host bridge 82437FX Triton PIIX\n");
triton1 = ZORAN_VDC_TRICOM;
}
}
/* ----------------------------------------------------------------------- */
/* ZORAN functions */
/* ----------------------------------------------------------------------- */
static void zoran_set_geo(struct zoran* ztv, struct vidinfo* i);
#if 0 /* unused */
static
void zoran_dump(struct zoran *ztv)
{
char str[256];
char *p=str; /* shut up, gcc! */
int i;
for (i=0; i<0x60; i+=4) {
if ((i % 16) == 0) {
if (i) printk("%s\n",str);
p = str;
p+= sprintf(str, KERN_DEBUG " %04x: ",i);
}
p += sprintf(p, "%08x ",zrread(i));
}
}
#endif /* unused */
static
void reap_states(struct zoran* ztv)
{
/* count frames */
ztv->fieldnr++;
/*
* Are we busy at all?
* This depends on if there is a workqueue AND the
* videotransfer is enabled on the chip...
*/
if (ztv->workqueue && (zrread(ZORAN_VDC) & ZORAN_VDC_VIDEN))
{
struct vidinfo* newitem;
/* did we get a complete frame? */
if (zrread(ZORAN_VSTR) & ZORAN_VSTR_GRAB)
return;
DEBUG(printk(CARD_DEBUG "completed %s at %p\n",CARD,ztv->workqueue->kindof==FBUFFER_GRAB?"grab":"read",ztv->workqueue));
/* we are done with this buffer, tell everyone */
ztv->workqueue->status = FBUFFER_DONE;
ztv->workqueue->fieldnr = ztv->fieldnr;
/* not good, here for BTTV_FIELDNR reasons */
ztv->lastfieldnr = ztv->fieldnr;
switch (ztv->workqueue->kindof) {
case FBUFFER_GRAB:
wake_up_interruptible(&ztv->grabq);
break;
case FBUFFER_VBI:
wake_up_interruptible(&ztv->vbiq);
break;
default:
printk(CARD_INFO "somebody killed the workqueue (kindof=%d)!\n",CARD,ztv->workqueue->kindof);
}
/* item completed, skip to next item in queue */
write_lock(&ztv->lock);
newitem = ztv->workqueue->next;
ztv->workqueue->next = 0; /* mark completed */
ztv->workqueue = newitem;
write_unlock(&ztv->lock);
}
/*
* ok, so it seems we have nothing in progress right now.
* Lets see if we can find some work.
*/
if (ztv->workqueue)
{
struct vidinfo* newitem;
again:
DEBUG(printk(CARD_DEBUG "starting %s at %p\n",CARD,ztv->workqueue->kindof==FBUFFER_GRAB?"grab":"read",ztv->workqueue));
/* loadup the frame settings */
read_lock(&ztv->lock);
zoran_set_geo(ztv,ztv->workqueue);
read_unlock(&ztv->lock);
switch (ztv->workqueue->kindof) {
case FBUFFER_GRAB:
case FBUFFER_VBI:
zrand(~ZORAN_OCR_OVLEN, ZORAN_OCR);
zror(ZORAN_VSTR_SNAPSHOT,ZORAN_VSTR);
zror(ZORAN_VDC_VIDEN,ZORAN_VDC);
/* start single-shot grab */
zror(ZORAN_VSTR_GRAB, ZORAN_VSTR);
break;
default:
printk(CARD_INFO "what is this doing on the queue? (kindof=%d)\n",CARD,ztv->workqueue->kindof);
write_lock(&ztv->lock);
newitem = ztv->workqueue->next;
ztv->workqueue->next = 0;
ztv->workqueue = newitem;
write_unlock(&ztv->lock);
if (newitem)
goto again; /* yeah, sure.. */
}
/* bye for now */
return;
}
DEBUG(printk(CARD_DEBUG "nothing in queue\n",CARD));
/*
* What? Even the workqueue is empty? Am i really here
* for nothing? Did i come all that way to... do nothing?
*/
/* do we need to overlay? */
if (test_bit(STATE_OVERLAY, &ztv->state))
{
/* are we already overlaying? */
if (!(zrread(ZORAN_OCR) & ZORAN_OCR_OVLEN) ||
!(zrread(ZORAN_VDC) & ZORAN_VDC_VIDEN))
{
DEBUG(printk(CARD_DEBUG "starting overlay\n",CARD));
read_lock(&ztv->lock);
zoran_set_geo(ztv,&ztv->overinfo);
read_unlock(&ztv->lock);
zror(ZORAN_OCR_OVLEN, ZORAN_OCR);
zrand(~ZORAN_VSTR_SNAPSHOT,ZORAN_VSTR);
zror(ZORAN_VDC_VIDEN,ZORAN_VDC);
}
/*
* leave overlaying on, but turn interrupts off.
*/
zrand(~ZORAN_ICR_EN,ZORAN_ICR);
return;
}
/* do we have any VBI idle time processing? */
if (test_bit(STATE_VBI, &ztv->state))
{
struct vidinfo* item;
struct vidinfo* lastitem;
/* protect the workqueue */
write_lock(&ztv->lock);
lastitem = ztv->workqueue;
if (lastitem)
while (lastitem->next) lastitem = lastitem->next;
for (item=ztv->readinfo; item!=ztv->readinfo+ZORAN_VBI_BUFFERS; item++)
if (item->next == 0 && item->status == FBUFFER_FREE)
{
DEBUG(printk(CARD_DEBUG "%p added to queue\n",CARD,item));
item->status = FBUFFER_BUSY;
if (!lastitem)
ztv->workqueue = item;
else
lastitem->next = item;
lastitem = item;
}
write_unlock(&ztv->lock);
if (ztv->workqueue)
goto again; /* hey, _i_ graduated :) */
}
/*
* Then we must be realy IDLE
*/
DEBUG(printk(CARD_DEBUG "turning off\n",CARD));
/* nothing further to do, disable DMA and further IRQs */
zrand(~ZORAN_VDC_VIDEN,ZORAN_VDC);
zrand(~ZORAN_ICR_EN,ZORAN_ICR);
}
static
void zoran_irq(int irq, void *dev_id)
{
u32 stat,estat;
int count = 0;
struct zoran *ztv = dev_id;
UNUSED(irq);
for (;;) {
/* get/clear interrupt status bits */
stat=zrread(ZORAN_ISR);
estat=stat & zrread(ZORAN_ICR);
if (!estat)
return;
zrwrite(estat,ZORAN_ISR);
IDEBUG(printk(CARD_DEBUG "estat %08x\n",CARD,estat));
IDEBUG(printk(CARD_DEBUG " stat %08x\n",CARD,stat));
if (estat & ZORAN_ISR_CODE)
{
IDEBUG(printk(CARD_DEBUG "CodReplIRQ\n",CARD));
}
if (estat & ZORAN_ISR_GIRQ0)
{
IDEBUG(printk(CARD_DEBUG "GIRQ0\n",CARD));
if (!ztv->card->usegirq1)
reap_states(ztv);
}
if (estat & ZORAN_ISR_GIRQ1)
{
IDEBUG(printk(CARD_DEBUG "GIRQ1\n",CARD));
if (ztv->card->usegirq1)
reap_states(ztv);
}
count++;
if (count > 10)
printk(CARD_ERR "irq loop %d (%x)\n",CARD,count,estat);
if (count > 20)
{
zrwrite(0, ZORAN_ICR);
printk(CARD_ERR "IRQ lockup, cleared int mask\n",CARD);
}
}
}
static
int zoran_muxsel(struct zoran* ztv, int channel, int norm)
{
int rv;
/* set the new video norm */
rv = i2c_control_device(&(ztv->i2c), I2C_DRIVERID_VIDEODECODER, DECODER_SET_NORM, &norm);
if (rv)
return rv;
ztv->norm = norm;
/* map the given channel to the cards decoder's channel */
channel = ztv->card->video_mux[channel] & CHANNEL_MASK;
/* set the new channel */
rv = i2c_control_device(&(ztv->i2c), I2C_DRIVERID_VIDEODECODER, DECODER_SET_INPUT, &channel);
return rv;
}
/* Tell the interrupt handler what to to. */
static
void zoran_cap(struct zoran* ztv, int on)
{
DEBUG(printk(CARD_DEBUG "zoran_cap(%d) state=%x\n",CARD,on,ztv->state));
if (on) {
ztv->running = 1;
/*
* turn interrupts (back) on. The DMA will be enabled
* inside the irq handler when it detects a restart.
*/
zror(ZORAN_ICR_EN,ZORAN_ICR);
}
else {
/*
* turn both interrupts and DMA off
*/
zrand(~ZORAN_VDC_VIDEN,ZORAN_VDC);
zrand(~ZORAN_ICR_EN,ZORAN_ICR);
ztv->running = 0;
}
}
static ulong dmask[] = {
0xFFFFFFFF, 0xFFFFFFFE, 0xFFFFFFFC, 0xFFFFFFF8,
0xFFFFFFF0, 0xFFFFFFE0, 0xFFFFFFC0, 0xFFFFFF80,
0xFFFFFF00, 0xFFFFFE00, 0xFFFFFC00, 0xFFFFF800,
0xFFFFF000, 0xFFFFE000, 0xFFFFC000, 0xFFFF8000,
0xFFFF0000, 0xFFFE0000, 0xFFFC0000, 0xFFF80000,
0xFFF00000, 0xFFE00000, 0xFFC00000, 0xFF800000,
0xFF000000, 0xFE000000, 0xFC000000, 0xF8000000,
0xF0000000, 0xE0000000, 0xC0000000, 0x80000000
};
static
void zoran_built_overlay(struct zoran* ztv, int count, struct video_clip *vcp)
{
ulong* mtop;
int ystep = (ztv->vidXshift + ztv->vidWidth+31)/32; /* next DWORD */
int i;
DEBUG(printk(KERN_DEBUG " overlay at %p, ystep=%d, clips=%d\n",ztv->overinfo.overlay,ystep,count));
for (i=0; i<count; i++) {
struct video_clip *vp = vcp+i;
UNUSED(vp);
DEBUG(printk(KERN_DEBUG " %d: clip(%d,%d,%d,%d)\n", i,vp->x,vp->y,vp->width,vp->height));
}
/*
* activate the visible portion of the screen
* Note we take some shortcuts here, because we
* know the width can never be < 32. (I.e. a DWORD)
* We also assume the overlay starts somewhere in
* the FIRST dword.
*/
{
int start = ztv->vidXshift;
ulong firstd = dmask[start];
ulong lastd = ~dmask[(start + ztv->overinfo.w) & 31];
mtop = ztv->overinfo.overlay;
for (i=0; i<ztv->overinfo.h; i++) {
int w = ztv->vidWidth;
ulong* line = mtop;
if (start & 31) {
*line++ = firstd;
w -= 32-(start&31);
}
memset(line, ~0, w/8);
if (w & 31)
line[w/32] = lastd;
mtop += ystep;
}
}
/* process clipping regions */
for (i=0; i<count; i++) {
int h;
if (vcp->x < 0 || (uint)vcp->x > ztv->overinfo.w ||
vcp->y < 0 || vcp->y > ztv->overinfo.h ||
vcp->width < 0 || (uint)(vcp->x+vcp->width) > ztv->overinfo.w ||
vcp->height < 0 || (vcp->y+vcp->height) > ztv->overinfo.h)
{
DEBUG(printk(CARD_DEBUG "invalid clipzone (%d,%d,%d,%d) not in (0,0,%d,%d), adapting\n",CARD,vcp->x,vcp->y,vcp->width,vcp->height,ztv->overinfo.w,ztv->overinfo.h));
if (vcp->x < 0) vcp->x = 0;
if ((uint)vcp->x > ztv->overinfo.w) vcp->x = ztv->overinfo.w;
if (vcp->y < 0) vcp->y = 0;
if (vcp->y > ztv->overinfo.h) vcp->y = ztv->overinfo.h;
if (vcp->width < 0) vcp->width = 0;
if ((uint)(vcp->x+vcp->width) > ztv->overinfo.w) vcp->width = ztv->overinfo.w - vcp->x;
if (vcp->height < 0) vcp->height = 0;
if (vcp->y+vcp->height > ztv->overinfo.h) vcp->height = ztv->overinfo.h - vcp->y;
// continue;
}
mtop = &ztv->overinfo.overlay[vcp->y*ystep];
for (h=0; h<=vcp->height; h++) {
int w;
int x = ztv->vidXshift + vcp->x;
for (w=0; w<=vcp->width; w++) {
clear_bit(x&31, &mtop[x/32]);
x++;
}
mtop += ystep;
}
++vcp;
}
mtop = ztv->overinfo.overlay;
zrwrite(virt_to_bus(mtop), ZORAN_MTOP);
zrwrite(virt_to_bus(mtop+ystep), ZORAN_MBOT);
zraor((ztv->vidInterlace*ystep)<<0,~ZORAN_OCR_MASKSTRIDE,ZORAN_OCR);
}
struct tvnorm
{
u16 Wt, Wa, Ht, Ha, HStart, VStart;
};
static struct tvnorm tvnorms[] = {
/* PAL-BDGHI */
/* { 864, 720, 625, 576, 131, 21 },*/
/*00*/ { 864, 768, 625, 576, 81, 17 },
/* NTSC */
/*01*/ { 858, 720, 525, 480, 121, 10 },
/* SECAM */
/*02*/ { 864, 720, 625, 576, 131, 21 },
/* BW50 */
/*03*/ { 864, 720, 625, 576, 131, 21 },
/* BW60 */
/*04*/ { 858, 720, 525, 480, 121, 10 }
};
#define TVNORMS (sizeof(tvnorms)/sizeof(tvnorm))
/*
* Program the chip for a setup as described in the vidinfo struct.
*
* Side-effects: calculates vidXshift, vidInterlace,
* vidHeight, vidWidth which are used in a later stage
* to calculate the overlay mask
*
* This is an internal function, as such it does not check the
* validity of the struct members... Spectaculair crashes will
* follow /very/ quick when you're wrong and the chip right :)
*/
static
void zoran_set_geo(struct zoran* ztv, struct vidinfo* i)
{
ulong top, bot;
int stride;
int winWidth, winHeight;
int maxWidth, maxHeight, maxXOffset, maxYOffset;
long vfec;
DEBUG(printk(CARD_DEBUG "set_geo(rect=(%d,%d,%d,%d), norm=%d, format=%d, bpp=%d, bpl=%d, busadr=%lx, overlay=%p)\n",CARD,i->x,i->y,i->w,i->h,ztv->norm,i->format,i->bpp,i->bpl,i->busadr,i->overlay));
/*
* make sure the DMA transfers are inhibited during our
* reprogramming of the chip
*/
zrand(~ZORAN_VDC_VIDEN,ZORAN_VDC);
maxWidth = tvnorms[ztv->norm].Wa;
maxHeight = tvnorms[ztv->norm].Ha/2;
maxXOffset = tvnorms[ztv->norm].HStart;
maxYOffset = tvnorms[ztv->norm].VStart;
/* setup vfec register (keep ExtFl,TopField and VCLKPol settings) */
vfec = (zrread(ZORAN_VFEC) & (ZORAN_VFEC_EXTFL|ZORAN_VFEC_TOPFIELD|ZORAN_VFEC_VCLKPOL)) |
(palette2fmt[i->format].mode & (ZORAN_VFEC_RGB|ZORAN_VFEC_ERRDIF|ZORAN_VFEC_LE|ZORAN_VFEC_PACK24));
/*
* Set top, bottom ptrs. Since these must be DWORD aligned,
* possible adjust the x and the width of the window.
* so the endposition stay the same. The vidXshift will make
* sure we are not writing pixels before the requested x.
*/
ztv->vidXshift = 0;
winWidth = i->w;
if (winWidth < 0)
winWidth = -winWidth;
top = i->busadr + i->x*i->bpp + i->y*i->bpl;
if (top & 3) {
ztv->vidXshift = (top & 3) / i->bpp;
winWidth += ztv->vidXshift;
DEBUG(printk(KERN_DEBUG " window-x shifted %d pixels left\n",ztv->vidXshift));
top &= ~3;
}
/*
* bottom points to next frame but in interleaved mode we want
* to 'mix' the 2 frames to one capture, so 'bot' points to one
* (physical) line below the top line.
*/
bot = top + i->bpl;
zrwrite(top,ZORAN_VTOP);
zrwrite(bot,ZORAN_VBOT);
/*
* Make sure the winWidth is DWORD aligned too,
* thereby automaticly making sure the stride to the
* next line is DWORD aligned too (as required by spec).
*/
if ((winWidth*i->bpp) & 3) {
DEBUG(printk(KERN_DEBUG " window-width enlarged by %d pixels\n",(winWidth*i->bpp) & 3));
winWidth += (winWidth*i->bpp) & 3;
}
/* determine the DispMode and stride */
if (i->h >= 0 && i->h <= maxHeight) {
/* single frame grab suffices for this height. */
vfec |= ZORAN_VFEC_DISPMOD;
ztv->vidInterlace = 0;
stride = i->bpl - (winWidth*i->bpp);
winHeight = i->h;
}
else {
/* interleaving needed for this height */
ztv->vidInterlace = 1;
stride = i->bpl*2 - (winWidth*i->bpp);
winHeight = i->h/2;
}
if (winHeight < 0) /* can happen for VBI! */
winHeight = -winHeight;
/* safety net, sometimes bpl is too short??? */
if (stride<0) {
DEBUG(printk(CARD_DEBUG "WARNING stride = %d\n",CARD,stride));
stride = 0;
}
zraor((winHeight<<12)|(winWidth<<0),~(ZORAN_VDC_VIDWINHT|ZORAN_VDC_VIDWINWID), ZORAN_VDC);
zraor(stride<<16,~ZORAN_VSTR_DISPSTRIDE,ZORAN_VSTR);
/* remember vidWidth, vidHeight for overlay calculations */
ztv->vidWidth = winWidth;
ztv->vidHeight = winHeight;
DEBUG(printk(KERN_DEBUG " top=%08lx, bottom=%08lx\n",top,bot));
DEBUG(printk(KERN_DEBUG " winWidth=%d, winHeight=%d\n",winWidth,winHeight));
DEBUG(printk(KERN_DEBUG " maxWidth=%d, maxHeight=%d\n",maxWidth,maxHeight));
DEBUG(printk(KERN_DEBUG " stride=%d\n",stride));
/*
* determine horizontal scales and crops
*/
if (i->w < 0) {
int Hstart = 1;
int Hend = Hstart + winWidth;
DEBUG(printk(KERN_DEBUG " Y: scale=0, start=%d, end=%d\n", Hstart, Hend));
zraor((Hstart<<10)|(Hend<<0),~(ZORAN_VFEH_HSTART|ZORAN_VFEH_HEND),ZORAN_VFEH);
}
else {
int Wa = maxWidth;
int X = (winWidth*64+Wa-1)/Wa;
int We = winWidth*64/X;
int HorDcm = 64-X;
int hcrop1 = 2*(Wa-We)/4;
/*
* BUGFIX: Juha Nurmela <junki@qn-lpr2-165.quicknet.inet.fi>
* found the solution to the color phase shift.
* See ChangeLog for the full explanation)
*/
int Hstart = (maxXOffset + hcrop1) | 1;
int Hend = Hstart + We - 1;
DEBUG(printk(KERN_DEBUG " X: scale=%d, start=%d, end=%d\n", HorDcm, Hstart, Hend));
zraor((Hstart<<10)|(Hend<<0),~(ZORAN_VFEH_HSTART|ZORAN_VFEH_HEND),ZORAN_VFEH);
vfec |= HorDcm<<14;
if (HorDcm<16)
vfec |= ZORAN_VFEC_HFILTER_1; /* no filter */
else if (HorDcm<32)
vfec |= ZORAN_VFEC_HFILTER_3; /* 3 tap filter */
else if (HorDcm<48)
vfec |= ZORAN_VFEC_HFILTER_4; /* 4 tap filter */
else vfec |= ZORAN_VFEC_HFILTER_5; /* 5 tap filter */
}
/*
* Determine vertical scales and crops
*
* when height is negative, we want to read starting at line 0
* One day someone might need access to these lines...
*/
if (i->h < 0) {
int Vstart = 0;
int Vend = Vstart + winHeight;
DEBUG(printk(KERN_DEBUG " Y: scale=0, start=%d, end=%d\n", Vstart, Vend));
zraor((Vstart<<10)|(Vend<<0),~(ZORAN_VFEV_VSTART|ZORAN_VFEV_VEND),ZORAN_VFEV);
}
else {
int Ha = maxHeight;
int Y = (winHeight*64+Ha-1)/Ha;
int He = winHeight*64/Y;
int VerDcm = 64-Y;
int vcrop1 = 2*(Ha-He)/4;
int Vstart = maxYOffset + vcrop1;
int Vend = Vstart + He - 1;
DEBUG(printk(KERN_DEBUG " Y: scale=%d, start=%d, end=%d\n", VerDcm, Vstart, Vend));
zraor((Vstart<<10)|(Vend<<0),~(ZORAN_VFEV_VSTART|ZORAN_VFEV_VEND),ZORAN_VFEV);
vfec |= VerDcm<<8;
}
DEBUG(printk(KERN_DEBUG " F: format=%d(=%s)\n",i->format,palette2fmt[i->format].name));
/* setup the requested format */
zrwrite(vfec, ZORAN_VFEC);
}
static
void zoran_common_open(struct zoran* ztv, int flags)
{
UNUSED(flags);
/* already opened? */
if (ztv->users++ != 0)
return;
/* unmute audio */
/* /what/ audio? */
ztv->state = 0;
/* setup the encoder to the initial values */
ztv->picture.colour=254<<7;
ztv->picture.brightness=128<<8;
ztv->picture.hue=128<<8;
ztv->picture.contrast=216<<7;
i2c_control_device(&ztv->i2c, I2C_DRIVERID_VIDEODECODER, DECODER_SET_PICTURE, &ztv->picture);
/* default to the composite input since my camera is there */
zoran_muxsel(ztv, 0, VIDEO_MODE_PAL);
}
static
void zoran_common_close(struct zoran* ztv)
{
if (--ztv->users != 0)
return;
/* mute audio */
/* /what/ audio? */
/* stop the chip */
zoran_cap(ztv, 0);
}
/*
* Open a zoran card. Right now the flags are just a hack
*/
static int zoran_open(struct video_device *dev, int flags)
{
struct zoran *ztv = (struct zoran*)dev;
struct vidinfo* item;
char* pos;
DEBUG(printk(CARD_DEBUG "open(dev,%d)\n",CARD,flags));
/*********************************************
* We really should be doing lazy allocing...
*********************************************/
/* allocate a frame buffer */
if (!ztv->fbuffer)
ztv->fbuffer = bmalloc(ZORAN_MAX_FBUFSIZE);
if (!ztv->fbuffer) {
/* could not get a buffer, bail out */
return -ENOBUFS;
}
/* at this time we _always_ have a framebuffer */
memset(ztv->fbuffer,0,ZORAN_MAX_FBUFSIZE);
if (!ztv->overinfo.overlay)
ztv->overinfo.overlay = kmalloc(1024*1024/8, GFP_KERNEL);
if (!ztv->overinfo.overlay) {
/* could not get an overlay buffer, bail out */
bfree(ztv->fbuffer, ZORAN_MAX_FBUFSIZE);
return -ENOBUFS;
}
/* at this time we _always_ have a overlay */
/* clear buffer status, and give them a DMAable address */
pos = ztv->fbuffer;
for (item=ztv->grabinfo; item!=ztv->grabinfo+ZORAN_MAX_FBUFFERS; item++)
{
item->status = FBUFFER_FREE;
item->memadr = pos;
item->busadr = virt_to_bus(pos);
pos += ZORAN_MAX_FBUFFER;
}
/* do the common part of all open's */
zoran_common_open(ztv, flags);
return 0;
}
static
void zoran_close(struct video_device* dev)
{
struct zoran *ztv = (struct zoran*)dev;
DEBUG(printk(CARD_DEBUG "close(dev)\n",CARD));
/* driver specific closure */
clear_bit(STATE_OVERLAY, &ztv->state);
zoran_common_close(ztv);
/*
* This is sucky but right now I can't find a good way to
* be sure its safe to free the buffer. We wait 5-6 fields
* which is more than sufficient to be sure.
*/
msleep(100); /* Wait 1/10th of a second */
/* free the allocated framebuffer */
bfree(ztv->fbuffer, ZORAN_MAX_FBUFSIZE);
ztv->fbuffer = 0;
kfree(ztv->overinfo.overlay);
ztv->overinfo.overlay = 0;
}
/*
* This read function could be used reentrant in a SMP situation.
*
* This is made possible by the spinlock which is kept till we
* found and marked a buffer for our own use. The lock must
* be released as soon as possible to prevent lock contention.
*/
static
long zoran_read(struct video_device* dev, char* buf, unsigned long count, int nonblock)
{
struct zoran *ztv = (struct zoran*)dev;
unsigned long max;
struct vidinfo* unused = 0;
struct vidinfo* done = 0;
DEBUG(printk(CARD_DEBUG "zoran_read(%p,%ld,%d)\n",CARD,buf,count,nonblock));
/* find ourself a free or completed buffer */
for (;;) {
struct vidinfo* item;
write_lock_irq(&ztv->lock);
for (item=ztv->grabinfo; item!=ztv->grabinfo+ZORAN_MAX_FBUFFERS; item++)
{
if (!unused && item->status == FBUFFER_FREE)
unused = item;
if (!done && item->status == FBUFFER_DONE)
done = item;
}
if (done || unused)
break;
/* no more free buffers, wait for them. */
write_unlock_irq(&ztv->lock);
if (nonblock)
return -EWOULDBLOCK;
interruptible_sleep_on(&ztv->grabq);
if (signal_pending(current))
return -EINTR;
}
/* Do we have 'ready' data? */
if (!done) {
/* no? than this will take a while... */
if (nonblock) {
write_unlock_irq(&ztv->lock);
return -EWOULDBLOCK;
}
/* mark the unused buffer as wanted */
unused->status = FBUFFER_BUSY;
unused->w = 320;
unused->h = 240;
unused->format = VIDEO_PALETTE_RGB24;
unused->bpp = palette2fmt[unused->format].bpp;
unused->bpl = unused->w * unused->bpp;
unused->next = 0;
{ /* add to tail of queue */
struct vidinfo* oldframe = ztv->workqueue;
if (!oldframe) ztv->workqueue = unused;
else {
while (oldframe->next) oldframe = oldframe->next;
oldframe->next = unused;
}
}
write_unlock_irq(&ztv->lock);
/* tell the state machine we want it filled /NOW/ */
zoran_cap(ztv, 1);
/* wait till this buffer gets grabbed */
wait_event_interruptible(ztv->grabq,
(unused->status != FBUFFER_BUSY));
/* see if a signal did it */
if (signal_pending(current))
return -EINTR;
done = unused;
}
else
write_unlock_irq(&ztv->lock);
/* Yes! we got data! */
max = done->bpl * done->h;
if (count > max)
count = max;
if (copy_to_user((void*)buf, done->memadr, count))
count = -EFAULT;
/* keep the engine running */
done->status = FBUFFER_FREE;
// zoran_cap(ztv,1);
/* tell listeners this buffer became free */
wake_up_interruptible(&ztv->grabq);
/* goodbye */
DEBUG(printk(CARD_DEBUG "zoran_read() returns %lu\n",CARD,count));
return count;
}
static
long zoran_write(struct video_device* dev, const char* buf, unsigned long count, int nonblock)
{
struct zoran *ztv = (struct zoran *)dev;
UNUSED(ztv); UNUSED(dev); UNUSED(buf); UNUSED(count); UNUSED(nonblock);
DEBUG(printk(CARD_DEBUG "zoran_write\n",CARD));
return -EINVAL;
}
static
unsigned int zoran_poll(struct video_device *dev, struct file *file, poll_table *wait)
{
struct zoran *ztv = (struct zoran *)dev;
struct vidinfo* item;
unsigned int mask = 0;
poll_wait(file, &ztv->grabq, wait);
for (item=ztv->grabinfo; item!=ztv->grabinfo+ZORAN_MAX_FBUFFERS; item++)
if (item->status == FBUFFER_DONE)
{
mask |= (POLLIN | POLLRDNORM);
break;
}
DEBUG(printk(CARD_DEBUG "zoran_poll()=%x\n",CARD,mask));
return mask;
}
/* append a new clipregion to the vector of video_clips */
static
void new_clip(struct video_window* vw, struct video_clip* vcp, int x, int y, int w, int h)
{
vcp[vw->clipcount].x = x;
vcp[vw->clipcount].y = y;
vcp[vw->clipcount].width = w;
vcp[vw->clipcount].height = h;
vw->clipcount++;
}
static
int zoran_ioctl(struct video_device* dev, unsigned int cmd, void *arg)
{
struct zoran* ztv = (struct zoran*)dev;
switch (cmd) {
case VIDIOCGCAP:
{
struct video_capability c;
DEBUG(printk(CARD_DEBUG "VIDIOCGCAP\n",CARD));
strcpy(c.name,ztv->video_dev.name);
c.type = VID_TYPE_CAPTURE|
VID_TYPE_OVERLAY|
VID_TYPE_CLIPPING|
VID_TYPE_FRAMERAM|
VID_TYPE_SCALES;
if (ztv->have_tuner)
c.type |= VID_TYPE_TUNER;
if (pci_problems & (PCIPCI_FAIL|PCIAGP_FAIL))
c.type &= ~VID_TYPE_OVERLAY;
if (ztv->have_decoder) {
c.channels = ztv->card->video_inputs;
c.audios = ztv->card->audio_inputs;
} else
/* no decoder -> no channels */
c.channels = c.audios = 0;
c.maxwidth = 768;
c.maxheight = 576;
c.minwidth = 32;
c.minheight = 32;
if (copy_to_user(arg,&c,sizeof(c)))
return -EFAULT;
break;
}
case VIDIOCGCHAN:
{
struct video_channel v;
int mux;
if (copy_from_user(&v, arg,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCGCHAN(%d)\n",CARD,v.channel));
v.flags=VIDEO_VC_AUDIO
#ifdef VIDEO_VC_NORM
|VIDEO_VC_NORM
#endif
;
v.tuners=0;
v.type=VIDEO_TYPE_CAMERA;
#ifdef I_EXPECT_POSSIBLE_NORMS_IN_THE_API
v.norm=VIDEO_MODE_PAL|
VIDEO_MODE_NTSC|
VIDEO_MODE_SECAM;
#else
v.norm=VIDEO_MODE_PAL;
#endif
/* too many inputs? no decoder -> no channels */
if (!ztv->have_decoder || v.channel < 0 || v.channel >= ztv->card->video_inputs)
return -EINVAL;
/* now determine the name of the channel */
mux = ztv->card->video_mux[v.channel];
if (mux & IS_TUNER) {
/* lets assume only one tuner, yes? */
strcpy(v.name,"Television");
v.type = VIDEO_TYPE_TV;
if (ztv->have_tuner) {
v.flags |= VIDEO_VC_TUNER;
v.tuners = 1;
}
}
else if (mux & IS_SVHS)
sprintf(v.name,"S-Video-%d",v.channel);
else
sprintf(v.name,"CVBS-%d",v.channel);
if (copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
break;
}
case VIDIOCSCHAN:
{ /* set video channel */
struct video_channel v;
if (copy_from_user(&v, arg,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSCHAN(%d,%d)\n",CARD,v.channel,v.norm));
/* too many inputs? no decoder -> no channels */
if (!ztv->have_decoder || v.channel >= ztv->card->video_inputs || v.channel < 0)
return -EINVAL;
if (v.norm != VIDEO_MODE_PAL &&
v.norm != VIDEO_MODE_NTSC &&
v.norm != VIDEO_MODE_SECAM &&
v.norm != VIDEO_MODE_AUTO)
return -EOPNOTSUPP;
/* make it happen, nr1! */
return zoran_muxsel(ztv,v.channel,v.norm);
}
case VIDIOCGTUNER:
{
struct video_tuner v;
if (copy_from_user(&v, arg,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCGTUNER(%d)\n",CARD,v.tuner));
/* Only no or one tuner for now */
if (!ztv->have_tuner || v.tuner)
return -EINVAL;
strcpy(v.name,"Television");
v.rangelow = 0;
v.rangehigh = ~0;
v.flags = VIDEO_TUNER_PAL|VIDEO_TUNER_NTSC|VIDEO_TUNER_SECAM;
v.mode = ztv->norm;
v.signal = 0xFFFF; /* unknown */
if (copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
break;
}
case VIDIOCSTUNER:
{
struct video_tuner v;
if (copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSTUNER(%d,%d)\n",CARD,v.tuner,v.mode));
/* Only no or one tuner for now */
if (!ztv->have_tuner || v.tuner)
return -EINVAL;
/* and it only has certain valid modes */
if( v.mode != VIDEO_MODE_PAL &&
v.mode != VIDEO_MODE_NTSC &&
v.mode != VIDEO_MODE_SECAM)
return -EOPNOTSUPP;
/* engage! */
return zoran_muxsel(ztv,v.tuner,v.mode);
}
case VIDIOCGPICT:
{
struct video_picture p = ztv->picture;
DEBUG(printk(CARD_DEBUG "VIDIOCGPICT\n",CARD));
p.depth = ztv->depth;
switch (p.depth) {
case 8: p.palette=VIDEO_PALETTE_YUV422;
break;
case 15: p.palette=VIDEO_PALETTE_RGB555;
break;
case 16: p.palette=VIDEO_PALETTE_RGB565;
break;
case 24: p.palette=VIDEO_PALETTE_RGB24;
break;
case 32: p.palette=VIDEO_PALETTE_RGB32;
break;
}
if (copy_to_user(arg, &p, sizeof(p)))
return -EFAULT;
break;
}
case VIDIOCSPICT:
{
struct video_picture p;
if (copy_from_user(&p, arg,sizeof(p)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSPICT(%d,%d,%d,%d,%d,%d,%d)\n",CARD,p.brightness,p.hue,p.colour,p.contrast,p.whiteness,p.depth,p.palette));
/* depth must match with framebuffer */
if (p.depth != ztv->depth)
return -EINVAL;
/* check if palette matches this bpp */
if (p.palette>NRPALETTES ||
palette2fmt[p.palette].bpp != ztv->overinfo.bpp)
return -EINVAL;
write_lock_irq(&ztv->lock);
ztv->overinfo.format = p.palette;
ztv->picture = p;
write_unlock_irq(&ztv->lock);
/* tell the decoder */
i2c_control_device(&ztv->i2c, I2C_DRIVERID_VIDEODECODER, DECODER_SET_PICTURE, &p);
break;
}
case VIDIOCGWIN:
{
struct video_window vw;
DEBUG(printk(CARD_DEBUG "VIDIOCGWIN\n",CARD));
read_lock(&ztv->lock);
vw.x = ztv->overinfo.x;
vw.y = ztv->overinfo.y;
vw.width = ztv->overinfo.w;
vw.height = ztv->overinfo.h;
vw.chromakey= 0;
vw.flags = 0;
if (ztv->vidInterlace)
vw.flags|=VIDEO_WINDOW_INTERLACE;
read_unlock(&ztv->lock);
if (copy_to_user(arg,&vw,sizeof(vw)))
return -EFAULT;
break;
}
case VIDIOCSWIN:
{
struct video_window vw;
struct video_clip *vcp;
int on;
if (copy_from_user(&vw,arg,sizeof(vw)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSWIN(%d,%d,%d,%d,%x,%d)\n",CARD,vw.x,vw.y,vw.width,vw.height,vw.flags,vw.clipcount));
if (vw.flags)
return -EINVAL;
if (vw.clipcount <0 || vw.clipcount>256)
return -EDOM; /* Too many! */
/*
* Do any clips.
*/
vcp = vmalloc(sizeof(struct video_clip)*(vw.clipcount+4));
if (vcp==NULL)
return -ENOMEM;
if (vw.clipcount && copy_from_user(vcp,vw.clips,sizeof(struct video_clip)*vw.clipcount)) {
vfree(vcp);
return -EFAULT;
}
on = ztv->running;
if (on)
zoran_cap(ztv, 0);
/*
* strange, it seems xawtv sometimes calls us with 0
* width and/or height. Ignore these values
*/
if (vw.x == 0)
vw.x = ztv->overinfo.x;
if (vw.y == 0)
vw.y = ztv->overinfo.y;
/* by now we are committed to the new data... */
write_lock_irq(&ztv->lock);
ztv->overinfo.x = vw.x;
ztv->overinfo.y = vw.y;
ztv->overinfo.w = vw.width;
ztv->overinfo.h = vw.height;
write_unlock_irq(&ztv->lock);
/*
* Impose display clips
*/
if (vw.x+vw.width > ztv->swidth)
new_clip(&vw, vcp, ztv->swidth-vw.x, 0, vw.width-1, vw.height-1);
if (vw.y+vw.height > ztv->sheight)
new_clip(&vw, vcp, 0, ztv->sheight-vw.y, vw.width-1, vw.height-1);
/* built the requested clipping zones */
zoran_set_geo(ztv, &ztv->overinfo);
zoran_built_overlay(ztv, vw.clipcount, vcp);
vfree(vcp);
/* if we were on, restart the video engine */
if (on)
zoran_cap(ztv, 1);
break;
}
case VIDIOCCAPTURE:
{
int v;
if (get_user(v, (int *)arg))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCCAPTURE(%d)\n",CARD,v));
if (v==0) {
clear_bit(STATE_OVERLAY, &ztv->state);
zoran_cap(ztv, 1);
}
else {
/* is VIDIOCSFBUF, VIDIOCSWIN done? */
if (ztv->overinfo.busadr==0 || ztv->overinfo.w==0 || ztv->overinfo.h==0)
return -EINVAL;
set_bit(STATE_OVERLAY, &ztv->state);
zoran_cap(ztv, 1);
}
break;
}
case VIDIOCGFBUF:
{
struct video_buffer v;
DEBUG(printk(CARD_DEBUG "VIDIOCGFBUF\n",CARD));
read_lock(&ztv->lock);
v.base = (void *)ztv->overinfo.busadr;
v.height = ztv->sheight;
v.width = ztv->swidth;
v.depth = ztv->depth;
v.bytesperline = ztv->overinfo.bpl;
read_unlock(&ztv->lock);
if(copy_to_user(arg, &v,sizeof(v)))
return -EFAULT;
break;
}
case VIDIOCSFBUF:
{
struct video_buffer v;
if(!capable(CAP_SYS_ADMIN))
return -EPERM;
if (pcipci_problems & (PCIPCI_FAIL|PCIAGP_FAIL))
return -ENXIO;
if (copy_from_user(&v, arg,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSFBUF(%p,%d,%d,%d,%d)\n",CARD,v.base, v.width,v.height,v.depth,v.bytesperline));
if (v.depth!=15 && v.depth!=16 && v.depth!=24 && v.depth!=32)
return -EINVAL;
if (v.bytesperline<1)
return -EINVAL;
if (ztv->running)
return -EBUSY;
write_lock_irq(&ztv->lock);
ztv->overinfo.busadr = (ulong)v.base;
ztv->sheight = v.height;
ztv->swidth = v.width;
ztv->depth = v.depth; /* bits per pixel */
ztv->overinfo.bpp = ((v.depth+1)&0x38)/8;/* bytes per pixel */
ztv->overinfo.bpl = v.bytesperline; /* bytes per line */
write_unlock_irq(&ztv->lock);
break;
}
case VIDIOCKEY:
{
/* Will be handled higher up .. */
break;
}
case VIDIOCSYNC:
{
int i;
if (get_user(i, (int *) arg))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDEOCSYNC(%d)\n",CARD,i));
if (i<0 || i>ZORAN_MAX_FBUFFERS)
return -EINVAL;
switch (ztv->grabinfo[i].status) {
case FBUFFER_FREE:
return -EINVAL;
case FBUFFER_BUSY:
/* wait till this buffer gets grabbed */
wait_event_interruptible(ztv->grabq,
(ztv->grabinfo[i].status != FBUFFER_BUSY));
/* see if a signal did it */
if (signal_pending(current))
return -EINTR;
/* don't fall through; a DONE buffer is not UNUSED */
break;
case FBUFFER_DONE:
ztv->grabinfo[i].status = FBUFFER_FREE;
/* tell ppl we have a spare buffer */
wake_up_interruptible(&ztv->grabq);
break;
}
DEBUG(printk(CARD_DEBUG "VIDEOCSYNC(%d) returns\n",CARD,i));
break;
}
case VIDIOCMCAPTURE:
{
struct video_mmap vm;
struct vidinfo* frame;
if (copy_from_user(&vm,arg,sizeof(vm)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCMCAPTURE(%d,(%d,%d),%d)\n",CARD,vm.frame,vm.width,vm.height,vm.format));
if (vm.frame<0 || vm.frame>ZORAN_MAX_FBUFFERS ||
vm.width<32 || vm.width>768 ||
vm.height<32 || vm.height>576 ||
vm.format>NRPALETTES ||
palette2fmt[vm.format].mode == 0)
return -EINVAL;
/* we are allowed to take over UNUSED and DONE buffers */
frame = &ztv->grabinfo[vm.frame];
if (frame->status == FBUFFER_BUSY)
return -EBUSY;
/* setup the other parameters if they are given */
write_lock_irq(&ztv->lock);
frame->w = vm.width;
frame->h = vm.height;
frame->format = vm.format;
frame->bpp = palette2fmt[frame->format].bpp;
frame->bpl = frame->w*frame->bpp;
frame->status = FBUFFER_BUSY;
frame->next = 0;
{ /* add to tail of queue */
struct vidinfo* oldframe = ztv->workqueue;
if (!oldframe) ztv->workqueue = frame;
else {
while (oldframe->next) oldframe = oldframe->next;
oldframe->next = frame;
}
}
write_unlock_irq(&ztv->lock);
zoran_cap(ztv, 1);
break;
}
case VIDIOCGMBUF:
{
struct video_mbuf mb;
int i;
DEBUG(printk(CARD_DEBUG "VIDIOCGMBUF\n",CARD));
mb.size = ZORAN_MAX_FBUFSIZE;
mb.frames = ZORAN_MAX_FBUFFERS;
for (i=0; i<ZORAN_MAX_FBUFFERS; i++)
mb.offsets[i] = i*ZORAN_MAX_FBUFFER;
if(copy_to_user(arg, &mb,sizeof(mb)))
return -EFAULT;
break;
}
case VIDIOCGUNIT:
{
struct video_unit vu;
DEBUG(printk(CARD_DEBUG "VIDIOCGUNIT\n",CARD));
vu.video = ztv->video_dev.minor;
vu.vbi = ztv->vbi_dev.minor;
vu.radio = VIDEO_NO_UNIT;
vu.audio = VIDEO_NO_UNIT;
vu.teletext = VIDEO_NO_UNIT;
if(copy_to_user(arg, &vu,sizeof(vu)))
return -EFAULT;
break;
}
case VIDIOCGFREQ:
{
unsigned long v = ztv->tuner_freq;
if (copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCGFREQ\n",CARD));
break;
}
case VIDIOCSFREQ:
{
unsigned long v;
if (copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSFREQ\n",CARD));
if (ztv->have_tuner) {
int fixme = v;
if (i2c_control_device(&(ztv->i2c), I2C_DRIVERID_TUNER, TUNER_SET_TVFREQ, &fixme) < 0)
return -EAGAIN;
}
ztv->tuner_freq = v;
break;
}
/* Why isn't this in the API?
* And why doesn't it take a buffer number?
case BTTV_FIELDNR:
{
unsigned long v = ztv->lastfieldnr;
if (copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "BTTV_FIELDNR\n",CARD));
break;
}
*/
default:
return -ENOIOCTLCMD;
}
return 0;
}
static
int zoran_mmap(struct vm_area_struct *vma, struct video_device* dev, const char* adr, unsigned long size)
{
struct zoran* ztv = (struct zoran*)dev;
unsigned long start = (unsigned long)adr;
unsigned long pos;
DEBUG(printk(CARD_DEBUG "zoran_mmap(0x%p,%ld)\n",CARD,adr,size));
/* sanity checks */
if (size > ZORAN_MAX_FBUFSIZE || !ztv->fbuffer)
return -EINVAL;
/* start mapping the whole shabang to user memory */
pos = (unsigned long)ztv->fbuffer;
while (size>0) {
unsigned long pfn = virt_to_phys((void*)pos) >> PAGE_SHIFT;
if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, PAGE_SHARED))
return -EAGAIN;
start += PAGE_SIZE;
pos += PAGE_SIZE;
size -= PAGE_SIZE;
}
return 0;
}
static struct video_device zr36120_template=
{
.owner = THIS_MODULE,
.name = "UNSET",
.type = VID_TYPE_TUNER|VID_TYPE_CAPTURE|VID_TYPE_OVERLAY,
.hardware = VID_HARDWARE_ZR36120,
.open = zoran_open,
.close = zoran_close,
.read = zoran_read,
.write = zoran_write,
.poll = zoran_poll,
.ioctl = zoran_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.mmap = zoran_mmap,
.minor = -1,
};
static
int vbi_open(struct video_device *dev, int flags)
{
struct zoran *ztv = dev->priv;
struct vidinfo* item;
DEBUG(printk(CARD_DEBUG "vbi_open(dev,%d)\n",CARD,flags));
/*
* During VBI device open, we continiously grab VBI-like
* data in the vbi buffer when we have nothing to do.
* Only when there is an explicit request for VBI data
* (read call) we /force/ a read.
*/
/* allocate buffers */
for (item=ztv->readinfo; item!=ztv->readinfo+ZORAN_VBI_BUFFERS; item++)
{
item->status = FBUFFER_FREE;
/* alloc */
if (!item->memadr) {
item->memadr = bmalloc(ZORAN_VBI_BUFSIZE);
if (!item->memadr) {
/* could not get a buffer, bail out */
while (item != ztv->readinfo) {
item--;
bfree(item->memadr, ZORAN_VBI_BUFSIZE);
item->memadr = 0;
item->busadr = 0;
}
return -ENOBUFS;
}
}
/* determine the DMAable address */
item->busadr = virt_to_bus(item->memadr);
}
/* do the common part of all open's */
zoran_common_open(ztv, flags);
set_bit(STATE_VBI, &ztv->state);
/* start read-ahead */
zoran_cap(ztv, 1);
return 0;
}
static
void vbi_close(struct video_device *dev)
{
struct zoran *ztv = dev->priv;
struct vidinfo* item;
DEBUG(printk(CARD_DEBUG "vbi_close(dev)\n",CARD));
/* driver specific closure */
clear_bit(STATE_VBI, &ztv->state);
zoran_common_close(ztv);
/*
* This is sucky but right now I can't find a good way to
* be sure its safe to free the buffer. We wait 5-6 fields
* which is more than sufficient to be sure.
*/
msleep(100); /* Wait 1/10th of a second */
for (item=ztv->readinfo; item!=ztv->readinfo+ZORAN_VBI_BUFFERS; item++)
{
if (item->memadr)
bfree(item->memadr, ZORAN_VBI_BUFSIZE);
item->memadr = 0;
}
}
/*
* This read function could be used reentrant in a SMP situation.
*
* This is made possible by the spinlock which is kept till we
* found and marked a buffer for our own use. The lock must
* be released as soon as possible to prevent lock contention.
*/
static
long vbi_read(struct video_device* dev, char* buf, unsigned long count, int nonblock)
{
struct zoran *ztv = dev->priv;
unsigned long max;
struct vidinfo* unused = 0;
struct vidinfo* done = 0;
DEBUG(printk(CARD_DEBUG "vbi_read(0x%p,%ld,%d)\n",CARD,buf,count,nonblock));
/* find ourself a free or completed buffer */
for (;;) {
struct vidinfo* item;
write_lock_irq(&ztv->lock);
for (item=ztv->readinfo; item!=ztv->readinfo+ZORAN_VBI_BUFFERS; item++) {
if (!unused && item->status == FBUFFER_FREE)
unused = item;
if (!done && item->status == FBUFFER_DONE)
done = item;
}
if (done || unused)
break;
/* no more free buffers, wait for them. */
write_unlock_irq(&ztv->lock);
if (nonblock)
return -EWOULDBLOCK;
interruptible_sleep_on(&ztv->vbiq);
if (signal_pending(current))
return -EINTR;
}
/* Do we have 'ready' data? */
if (!done) {
/* no? than this will take a while... */
if (nonblock) {
write_unlock_irq(&ztv->lock);
return -EWOULDBLOCK;
}
/* mark the unused buffer as wanted */
unused->status = FBUFFER_BUSY;
unused->next = 0;
{ /* add to tail of queue */
struct vidinfo* oldframe = ztv->workqueue;
if (!oldframe) ztv->workqueue = unused;
else {
while (oldframe->next) oldframe = oldframe->next;
oldframe->next = unused;
}
}
write_unlock_irq(&ztv->lock);
/* tell the state machine we want it filled /NOW/ */
zoran_cap(ztv, 1);
/* wait till this buffer gets grabbed */
wait_event_interruptible(ztv->vbiq,
(unused->status != FBUFFER_BUSY));
/* see if a signal did it */
if (signal_pending(current))
return -EINTR;
done = unused;
}
else
write_unlock_irq(&ztv->lock);
/* Yes! we got data! */
max = done->bpl * -done->h;
if (count > max)
count = max;
/* check if the user gave us enough room to write the data */
if (!access_ok(VERIFY_WRITE, buf, count)) {
count = -EFAULT;
goto out;
}
/*
* Now transform/strip the data from YUV to Y-only
* NB. Assume the Y is in the LSB of the YUV data.
*/
{
unsigned char* optr = buf;
unsigned char* eptr = buf+count;
/* are we beeing accessed from an old driver? */
if (count == 2*19*2048) {
/*
* Extreme HACK, old VBI programs expect 2048 points
* of data, and we only got 864 orso. Double each
* datapoint and clear the rest of the line.
* This way we have appear to have a
* sample_frequency of 29.5 Mc.
*/
int x,y;
unsigned char* iptr = done->memadr+1;
for (y=done->h; optr<eptr && y<0; y++)
{
/* copy to doubled data to userland */
for (x=0; optr+1<eptr && x<-done->w; x++)
{
unsigned char a = iptr[x*2];
__put_user(a, optr++);
__put_user(a, optr++);
}
/* and clear the rest of the line */
for (x*=2; optr<eptr && x<done->bpl; x++)
__put_user(0, optr++);
/* next line */
iptr += done->bpl;
}
}
else {
/*
* Other (probably newer) programs asked
* us what geometry we are using, and are
* reading the correct size.
*/
int x,y;
unsigned char* iptr = done->memadr+1;
for (y=done->h; optr<eptr && y<0; y++)
{
/* copy to doubled data to userland */
for (x=0; optr<eptr && x<-done->w; x++)
__put_user(iptr[x*2], optr++);
/* and clear the rest of the line */
for (;optr<eptr && x<done->bpl; x++)
__put_user(0, optr++);
/* next line */
iptr += done->bpl;
}
}
/* API compliance:
* place the framenumber (half fieldnr) in the last long
*/
__put_user(done->fieldnr/2, ((ulong*)eptr)[-1]);
}
/* keep the engine running */
done->status = FBUFFER_FREE;
zoran_cap(ztv, 1);
/* tell listeners this buffer just became free */
wake_up_interruptible(&ztv->vbiq);
/* goodbye */
out:
DEBUG(printk(CARD_DEBUG "vbi_read() returns %lu\n",CARD,count));
return count;
}
static
unsigned int vbi_poll(struct video_device *dev, struct file *file, poll_table *wait)
{
struct zoran *ztv = dev->priv;
struct vidinfo* item;
unsigned int mask = 0;
poll_wait(file, &ztv->vbiq, wait);
for (item=ztv->readinfo; item!=ztv->readinfo+ZORAN_VBI_BUFFERS; item++)
if (item->status == FBUFFER_DONE)
{
mask |= (POLLIN | POLLRDNORM);
break;
}
DEBUG(printk(CARD_DEBUG "vbi_poll()=%x\n",CARD,mask));
return mask;
}
static
int vbi_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
{
struct zoran* ztv = dev->priv;
switch (cmd) {
case VIDIOCGVBIFMT:
{
struct vbi_format f;
DEBUG(printk(CARD_DEBUG "VIDIOCGVBIINFO\n",CARD));
f.sampling_rate = 14750000UL;
f.samples_per_line = -ztv->readinfo[0].w;
f.sample_format = VIDEO_PALETTE_RAW;
f.start[0] = f.start[1] = ztv->readinfo[0].y;
f.start[1] += 312;
f.count[0] = f.count[1] = -ztv->readinfo[0].h;
f.flags = VBI_INTERLACED;
if (copy_to_user(arg,&f,sizeof(f)))
return -EFAULT;
break;
}
case VIDIOCSVBIFMT:
{
struct vbi_format f;
int i;
if (copy_from_user(&f, arg,sizeof(f)))
return -EFAULT;
DEBUG(printk(CARD_DEBUG "VIDIOCSVBIINFO(%d,%d,%d,%d,%d,%d,%d,%x)\n",CARD,f.sampling_rate,f.samples_per_line,f.sample_format,f.start[0],f.start[1],f.count[0],f.count[1],f.flags));
/* lots of parameters are fixed... (PAL) */
if (f.sampling_rate != 14750000UL ||
f.samples_per_line > 864 ||
f.sample_format != VIDEO_PALETTE_RAW ||
f.start[0] < 0 ||
f.start[0] != f.start[1]-312 ||
f.count[0] != f.count[1] ||
f.start[0]+f.count[0] >= 288 ||
f.flags != VBI_INTERLACED)
return -EINVAL;
write_lock_irq(&ztv->lock);
ztv->readinfo[0].y = f.start[0];
ztv->readinfo[0].w = -f.samples_per_line;
ztv->readinfo[0].h = -f.count[0];
ztv->readinfo[0].bpl = f.samples_per_line*ztv->readinfo[0].bpp;
for (i=1; i<ZORAN_VBI_BUFFERS; i++)
ztv->readinfo[i] = ztv->readinfo[i];
write_unlock_irq(&ztv->lock);
break;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
static struct video_device vbi_template=
{
.owner = THIS_MODULE,
.name = "UNSET",
.type = VID_TYPE_CAPTURE|VID_TYPE_TELETEXT,
.hardware = VID_HARDWARE_ZR36120,
.open = vbi_open,
.close = vbi_close,
.read = vbi_read,
.write = zoran_write,
.poll = vbi_poll,
.ioctl = vbi_ioctl,
.minor = -1,
};
/*
* Scan for a Zoran chip, request the irq and map the io memory
*/
static
int __init find_zoran(void)
{
int result;
struct zoran *ztv;
struct pci_dev *dev = NULL;
unsigned char revision;
int zoran_num = 0;
while ((dev = pci_get_device(PCI_VENDOR_ID_ZORAN,PCI_DEVICE_ID_ZORAN_36120, dev)))
{
/* Ok, a ZR36120/ZR36125 found! */
ztv = &zorans[zoran_num];
ztv->dev = dev;
if (pci_enable_device(dev))
continue;
pci_read_config_byte(dev, PCI_CLASS_REVISION, &revision);
printk(KERN_INFO "zoran: Zoran %x (rev %d) ",
dev->device, revision);
printk("bus: %d, devfn: %d, irq: %d, ",
dev->bus->number, dev->devfn, dev->irq);
printk("memory: 0x%08lx.\n", ztv->zoran_adr);
ztv->zoran_mem = ioremap(ztv->zoran_adr, 0x1000);
DEBUG(printk(KERN_DEBUG "zoran: mapped-memory at 0x%p\n",ztv->zoran_mem));
result = request_irq(dev->irq, zoran_irq,
IRQF_SHARED|IRQF_DISABLED,"zoran", ztv);
if (result==-EINVAL)
{
iounmap(ztv->zoran_mem);
printk(KERN_ERR "zoran: Bad irq number or handler\n");
continue;
}
if (result==-EBUSY)
printk(KERN_ERR "zoran: IRQ %d busy, change your PnP config in BIOS\n",dev->irq);
if (result < 0) {
iounmap(ztv->zoran_mem);
continue;
}
/* Enable bus-mastering */
pci_set_master(dev);
/* Keep a reference */
pci_dev_get(dev);
zoran_num++;
}
if(zoran_num)
printk(KERN_INFO "zoran: %d Zoran card(s) found.\n",zoran_num);
return zoran_num;
}
static
int __init init_zoran(int card)
{
struct zoran *ztv = &zorans[card];
int i;
/* if the given cardtype valid? */
if (cardtype[card]>=NRTVCARDS) {
printk(KERN_INFO "invalid cardtype(%d) detected\n",cardtype[card]);
return -1;
}
/* reset the zoran */
zrand(~ZORAN_PCI_SOFTRESET,ZORAN_PCI);
udelay(10);
zror(ZORAN_PCI_SOFTRESET,ZORAN_PCI);
udelay(10);
/* zoran chip specific details */
ztv->card = tvcards+cardtype[card]; /* point to the selected card */
ztv->norm = 0; /* PAL */
ztv->tuner_freq = 0;
/* videocard details */
ztv->swidth = 800;
ztv->sheight = 600;
ztv->depth = 16;
/* State details */
ztv->fbuffer = 0;
ztv->overinfo.kindof = FBUFFER_OVERLAY;
ztv->overinfo.status = FBUFFER_FREE;
ztv->overinfo.x = 0;
ztv->overinfo.y = 0;
ztv->overinfo.w = 768; /* 640 */
ztv->overinfo.h = 576; /* 480 */
ztv->overinfo.format = VIDEO_PALETTE_RGB565;
ztv->overinfo.bpp = palette2fmt[ztv->overinfo.format].bpp;
ztv->overinfo.bpl = ztv->overinfo.bpp*ztv->swidth;
ztv->overinfo.busadr = 0;
ztv->overinfo.memadr = 0;
ztv->overinfo.overlay = 0;
for (i=0; i<ZORAN_MAX_FBUFFERS; i++) {
ztv->grabinfo[i] = ztv->overinfo;
ztv->grabinfo[i].kindof = FBUFFER_GRAB;
}
init_waitqueue_head(&ztv->grabq);
/* VBI details */
ztv->readinfo[0] = ztv->overinfo;
ztv->readinfo[0].kindof = FBUFFER_VBI;
ztv->readinfo[0].w = -864;
ztv->readinfo[0].h = -38;
ztv->readinfo[0].format = VIDEO_PALETTE_YUV422;
ztv->readinfo[0].bpp = palette2fmt[ztv->readinfo[0].format].bpp;
ztv->readinfo[0].bpl = 1024*ztv->readinfo[0].bpp;
for (i=1; i<ZORAN_VBI_BUFFERS; i++)
ztv->readinfo[i] = ztv->readinfo[0];
init_waitqueue_head(&ztv->vbiq);
/* maintenance data */
ztv->have_decoder = 0;
ztv->have_tuner = 0;
ztv->tuner_type = 0;
ztv->running = 0;
ztv->users = 0;
rwlock_init(&ztv->lock);
ztv->workqueue = 0;
ztv->fieldnr = 0;
ztv->lastfieldnr = 0;
if (triton1)
zrand(~ZORAN_VDC_TRICOM, ZORAN_VDC);
/* external FL determines TOP frame */
zror(ZORAN_VFEC_EXTFL, ZORAN_VFEC);
/* set HSpol */
if (ztv->card->hsync_pos)
zrwrite(ZORAN_VFEH_HSPOL, ZORAN_VFEH);
/* set VSpol */
if (ztv->card->vsync_pos)
zrwrite(ZORAN_VFEV_VSPOL, ZORAN_VFEV);
/* Set the proper General Purpuse register bits */
/* implicit: no softreset, 0 waitstates */
zrwrite(ZORAN_PCI_SOFTRESET|(ztv->card->gpdir<<0),ZORAN_PCI);
/* implicit: 3 duration and recovery PCI clocks on guest 0-3 */
zrwrite(ztv->card->gpval<<24,ZORAN_GUEST);
/* clear interrupt status */
zrwrite(~0, ZORAN_ISR);
/*
* i2c template
*/
ztv->i2c = zoran_i2c_bus_template;
sprintf(ztv->i2c.name,"zoran-%d",card);
ztv->i2c.data = ztv;
/*
* Now add the template and register the device unit
*/
ztv->video_dev = zr36120_template;
strcpy(ztv->video_dev.name, ztv->i2c.name);
ztv->video_dev.priv = ztv;
if (video_register_device(&ztv->video_dev, VFL_TYPE_GRABBER, video_nr) < 0)
return -1;
ztv->vbi_dev = vbi_template;
strcpy(ztv->vbi_dev.name, ztv->i2c.name);
ztv->vbi_dev.priv = ztv;
if (video_register_device(&ztv->vbi_dev, VFL_TYPE_VBI, vbi_nr) < 0) {
video_unregister_device(&ztv->video_dev);
return -1;
}
i2c_register_bus(&ztv->i2c);
/* set interrupt mask - the PIN enable will be set later */
zrwrite(ZORAN_ICR_GIRQ0|ZORAN_ICR_GIRQ1|ZORAN_ICR_CODE, ZORAN_ICR);
printk(KERN_INFO "%s: installed %s\n",ztv->i2c.name,ztv->card->name);
return 0;
}
static
void release_zoran(int max)
{
struct zoran *ztv;
int i;
for (i=0;i<max; i++)
{
ztv = &zorans[i];
/* turn off all capturing, DMA and IRQs */
/* reset the zoran */
zrand(~ZORAN_PCI_SOFTRESET,ZORAN_PCI);
udelay(10);
zror(ZORAN_PCI_SOFTRESET,ZORAN_PCI);
udelay(10);
/* first disable interrupts before unmapping the memory! */
zrwrite(0, ZORAN_ICR);
zrwrite(0xffffffffUL,ZORAN_ISR);
/* free it */
free_irq(ztv->dev->irq,ztv);
/* unregister i2c_bus */
i2c_unregister_bus((&ztv->i2c));
/* unmap and free memory */
if (ztv->zoran_mem)
iounmap(ztv->zoran_mem);
/* Drop PCI device */
pci_dev_put(ztv->dev);
video_unregister_device(&ztv->video_dev);
video_unregister_device(&ztv->vbi_dev);
}
}
void __exit zr36120_exit(void)
{
release_zoran(zoran_cards);
}
int __init zr36120_init(void)
{
int card;
handle_chipset();
zoran_cards = find_zoran();
if (zoran_cards <= 0)
return -EIO;
/* initialize Zorans */
for (card=0; card<zoran_cards; card++) {
if (init_zoran(card) < 0) {
/* only release the zorans we have registered */
release_zoran(card);
return -EIO;
}
}
return 0;
}
module_init(zr36120_init);
module_exit(zr36120_exit);
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