brooktree848.c

基于组件方式开发操作系统的OSKIT源代码

	bt848_ptr_t	bt848;
#ifdef BROOKTREE_IRQ
	u_long		old_irq, new_irq;
#endif 
	vm_offset_t	buf;
	u_long		latency;
	u_long		fun;
	unsigned int	rev;

#ifdef __FreeBSD__
	bktr = &brooktree[unit];

	if (unit >= NBKTR) {
		printf("brooktree%d: attach: only %d units configured.\n",
		        unit, NBKTR);
		printf("brooktree%d: attach: invalid unit number.\n", unit);
		return;
	}

	bktr->tag = tag;
	pci_map_mem( tag, PCI_MAP_REG_START, (vm_offset_t *) &bktr->base,
		     &bktr->phys_base );
	fun = pci_conf_read(tag, 0x40);
	pci_conf_write(tag, 0x40, fun | 1);

	/* XXX call bt848_i2c dependent attach() routine */
	if (bt848_i2c_attach(unit, bktr->base, &bktr->i2c_sc))
		printf("bktr%d: i2c_attach: can't attach\n", unit);

#ifdef BROOKTREE_IRQ		/* from the configuration file */
	old_irq = pci_conf_read(tag, PCI_INTERRUPT_REG);
	pci_conf_write(tag, PCI_INTERRUPT_REG, BROOKTREE_IRQ);
	new_irq = pci_conf_read(tag, PCI_INTERRUPT_REG);
	printf("bktr%d: attach: irq changed from %d to %d\n",
		unit, (old_irq & 0xff), (new_irq & 0xff));
#endif 
	/* setup the interrupt handling routine */
	pci_map_int(tag, bktr_intr, (void*) bktr, &net_imask);
#endif  /* __FreeBSD__ */

#ifdef __bsdi__
	struct isa_attach_args * const ia = (struct isa_attach_args *)aux;
	pci_devaddr_t *tag = (pci_devaddr_t *) ia->ia_aux;
	int unit  = bktr->bktr_dev.dv_unit;

	bktr = (bktr_reg_t *) self;
	bktr->base = (bt848_ptr_t) bktr_res.pci_vaddr;
	isa_establish(&bktr->bktr_id, &bktr->bktr_dev);
	bktr->bktr_ih.ih_fun = bktr_intr_returning_1;
	bktr->bktr_ih.ih_arg = (void *)bktr;
	intr_establish(ia->ia_irq, &bktr->bktr_ih, DV_DULL);
#endif /* __bsdi__ */
	
/*
 * PCI latency timer.  32 is a good value for 4 bus mastering slots, if
 * you have more than four, then 16 would probably be a better value.
 */
#ifndef BROOKTREE_DEF_LATENCY_VALUE
#define BROOKTREE_DEF_LATENCY_VALUE	10
#endif
	latency = pci_conf_read(tag, PCI_LATENCY_TIMER);
	latency = (latency >> 8) & 0xff;
	if ( bootverbose ) {
		if (latency)
			printf("brooktree%d: PCI bus latency is", unit);
		else
			printf("brooktree%d: PCI bus latency was 0 changing to",
				unit);
	}
	if ( !latency ) {
		latency = BROOKTREE_DEF_LATENCY_VALUE;
		pci_conf_write(tag, PCI_LATENCY_TIMER,	latency<<8);
	}
	if ( bootverbose ) {
		printf(" %d.\n", (int) latency);
	}


	/* allocate space for dma program */
	bktr->dma_prog = get_bktr_mem(unit, DMA_PROG_ALLOC);
	bktr->odd_dma_prog = get_bktr_mem(unit, DMA_PROG_ALLOC);

	/* allocate space for pixel buffer */
	if ( BROOKTREE_ALLOC )
		buf = get_bktr_mem(unit, BROOKTREE_ALLOC);
	else
		buf = 0;

	if ( bootverbose ) {
		printf("bktr%d: buffer size %d, addr 0x%x\n",
			unit, BROOKTREE_ALLOC, vtophys(buf));
	}

	bktr->bigbuf = buf;
	bktr->alloc_pages = BROOKTREE_ALLOC_PAGES;

	fun = pci_conf_read(tag, PCI_COMMAND_STATUS_REG);
	pci_conf_write(tag, PCI_COMMAND_STATUS_REG, fun | 2);

	if ( buf != 0 ) {
		bzero((caddr_t) buf, BROOKTREE_ALLOC);
		buf = vtophys(buf);
		bktr->flags = METEOR_INITALIZED | METEOR_AUTOMODE |
			      METEOR_DEV0 | METEOR_RGB16;
		bktr->dma_prog_loaded = FALSE;
		bktr->cols = 640;
		bktr->rows = 480;
		bktr->frames = 1;		/* one frame */
		bktr->format = METEOR_GEO_RGB16;
		bktr->pixfmt = oformat_meteor_to_bt( bktr->format );
		bktr->pixfmt_compat = TRUE;
		bt848 = bktr->base;
		bt848->int_mask = ALL_INTS_DISABLED;
		bt848->gpio_dma_ctl = FIFO_RISC_DISABLED;
	}

	/* read the pci id and determine the card type */
	fun = pci_conf_read(tag, PCI_ID_REG);
        rev = pci_conf_read(tag, PCIR_REVID) & 0x000000ff;
	 
	switch (fun) {
	case BROOKTREE_848_PCI_ID:
		if (rev == 0x12) bktr->id = BROOKTREE_848A;
		else             bktr->id = BROOKTREE_848;
		break;
        case BROOKTREE_849_PCI_ID:
		bktr->id = BROOKTREE_849;
		break;
        case BROOKTREE_878_PCI_ID:
		bktr->id = BROOKTREE_878;
		break;
        case BROOKTREE_879_PCI_ID:
		bktr->id = BROOKTREE_879;
		break;
	};


	bktr->clr_on_start = FALSE;
	/* defaults for the tuner section of the card */
	bktr->tflags = TUNER_INITALIZED;
	bktr->tuner.frequency = 0;
	bktr->tuner.channel = 0;
	bktr->tuner.chnlset = DEFAULT_CHNLSET;
	bktr->audio_mux_select = 0;
	bktr->audio_mute_state = FALSE;
	bktr->bt848_card = -1;
	bktr->bt848_tuner = -1;
	bktr->reverse_mute = -1;

	probeCard( bktr, TRUE );

	/* If there is an MSP Audio device, reset it and display the model */
	if (bktr->card.msp3400c)msp_reset(bktr);
	if (bktr->card.msp3400c)msp_read_id(bktr);

#ifdef DEVFS
	/* XXX This just throw away the token, which should probably be fixed when
	   DEVFS is finally made really operational. */
	devfs_add_devswf(&bktr_cdevsw, unit,    DV_CHR, 0, 0, 0444, "bktr%d",  unit);
	devfs_add_devswf(&bktr_cdevsw, unit+16, DV_CHR, 0, 0, 0444, "tuner%d", unit);
#endif /* DEVFS */
#if __FreeBSD__ > 2 
	fun = pci_conf_read(tag, PCI_COMMAND_STATUS_REG);
	pci_conf_write(tag, PCI_COMMAND_STATUS_REG, fun | 4);
#endif

}


/*
 * interrupt handling routine complete bktr_read() if using interrupts.
 */
static void
bktr_intr( void *arg )
{ 
	bktr_ptr_t		bktr;
	bt848_ptr_t		bt848;
	u_long			bktr_status;
	u_char			dstatus;
	u_long                  field;
	u_long                  w_field;
	u_long                  req_field;

	bktr = (bktr_ptr_t) arg;
	bt848 = bktr->base;

	/*
	 * check to see if any interrupts are unmasked on this device.  If
	 * none are, then we likely got here by way of being on a PCI shared
	 * interrupt dispatch list.
	 */
	if (bt848->int_mask == ALL_INTS_DISABLED)
	  	return;		/* bail out now, before we do something we
				   shouldn't */

	if (!(bktr->flags & METEOR_OPEN)) {
		bt848->gpio_dma_ctl = FIFO_RISC_DISABLED;
		bt848->int_mask = ALL_INTS_DISABLED;
		/* return; ?? */
	}

	/* record and clear the INTerrupt status bits */
	bktr_status = bt848->int_stat;
	bt848->int_stat = bktr_status & ~I2C_BITS;	/* don't touch i2c */

	/* record and clear the device status register */
	dstatus = bt848->dstatus;
	bt848->dstatus = 0x00;

#if defined( STATUS_SUM )
	/* add any new device status or INTerrupt status bits */
	status_sum |= (bktr_status & ~(BT848_INT_RSV0|BT848_INT_RSV1));
	status_sum |= ((dstatus & (BT848_DSTATUS_COF|BT848_DSTATUS_LOF)) << 6);
#endif /* STATUS_SUM */
	/* printf( " STATUS %x %x %x \n",
		dstatus, bktr_status, bt848->risc_count );
	*/
	/* if risc was disabled re-start process again */
	if ( !(bktr_status & BT848_INT_RISC_EN) ||
	     ((bktr_status &(BT848_INT_FBUS   |
			      BT848_INT_FTRGT  |
			      BT848_INT_FDSR   |
			      BT848_INT_PPERR  |
			      BT848_INT_RIPERR |
			      BT848_INT_PABORT |
			      BT848_INT_OCERR  |
			      BT848_INT_SCERR) ) != 0) ||
	     ((bt848->tdec == 0) && (bktr_status & TDEC_BITS)) ) {

		u_short	tdec_save = bt848->tdec;

		bt848->gpio_dma_ctl = FIFO_RISC_DISABLED;

		bt848->int_mask = ALL_INTS_DISABLED;

		/*  Reset temporal decimation ctr  */
		bt848->tdec = 0;
		bt848->tdec = tdec_save;
		
		/*  Reset to no-fields captured state  */
		if (bktr->flags & (METEOR_CONTIN | METEOR_SYNCAP)) {
			switch(bktr->flags & METEOR_ONLY_FIELDS_MASK) {
			case METEOR_ONLY_ODD_FIELDS:
				bktr->flags |= METEOR_WANT_ODD;
				break;
			case METEOR_ONLY_EVEN_FIELDS:
				bktr->flags |= METEOR_WANT_EVEN;
				break;
			default:
				bktr->flags |= METEOR_WANT_MASK;
				break;
			}
		}

		bt848->risc_strt_add = vtophys(bktr->dma_prog);
		bt848->gpio_dma_ctl = FIFO_ENABLED;
		bt848->gpio_dma_ctl = bktr->capcontrol;

		bt848->int_mask = BT848_INT_MYSTERYBIT |
				  BT848_INT_RISCI      |
				  BT848_INT_VSYNC      |
				  BT848_INT_FMTCHG;

		bt848->cap_ctl = bktr->bktr_cap_ctl;

		return;
	}

	if (!(bktr_status & BT848_INT_RISCI))
		return;
/**
	printf( "intr status %x %x %x\n",
		bktr_status, dstatus, bt848->risc_count );
 */

	/*
	 * Disable future interrupts if a capture mode is not selected.
	 * This can happen when we are in the process of closing or 
	 * changing capture modes, otherwise it shouldn't happen.
	 */
	if (!(bktr->flags & METEOR_CAP_MASK))
		bt848->cap_ctl = CAPTURE_OFF;

	/*
	 *  Register the completed field
	 *    (For dual-field mode, require fields from the same frame)
	 */
	field = ( bktr_status & BT848_INT_FIELD ) ? EVEN_F : ODD_F;
	switch ( bktr->flags & METEOR_WANT_MASK ) {
		case METEOR_WANT_ODD  : w_field = ODD_F         ;  break;
		case METEOR_WANT_EVEN : w_field = EVEN_F        ;  break;
		default               : w_field = (ODD_F|EVEN_F);  break;
	}
	switch ( bktr->flags & METEOR_ONLY_FIELDS_MASK ) {
		case METEOR_ONLY_ODD_FIELDS  : req_field = ODD_F  ;  break;
		case METEOR_ONLY_EVEN_FIELDS : req_field = EVEN_F ;  break;
		default                      : req_field = (ODD_F|EVEN_F);  
			                       break;
	}

	if (( field == EVEN_F ) && ( w_field == EVEN_F ))
		bktr->flags &= ~METEOR_WANT_EVEN;
	else if (( field == ODD_F ) && ( req_field == ODD_F ) &&
		 ( w_field == ODD_F ))
		bktr->flags &= ~METEOR_WANT_ODD;
	else if (( field == ODD_F ) && ( req_field == (ODD_F|EVEN_F) ) &&
		 ( w_field == (ODD_F|EVEN_F) ))
		bktr->flags &= ~METEOR_WANT_ODD;
	else if (( field == ODD_F ) && ( req_field == (ODD_F|EVEN_F) ) &&
		 ( w_field == ODD_F )) {
		bktr->flags &= ~METEOR_WANT_ODD;
		bktr->flags |=  METEOR_WANT_EVEN;
	}
	else {
		/*  We're out of sync.  Start over.  */
		if (bktr->flags & (METEOR_CONTIN | METEOR_SYNCAP)) {
			switch(bktr->flags & METEOR_ONLY_FIELDS_MASK) {
			case METEOR_ONLY_ODD_FIELDS:
				bktr->flags |= METEOR_WANT_ODD;
				break;
			case METEOR_ONLY_EVEN_FIELDS:
				bktr->flags |= METEOR_WANT_EVEN;
				break;
			default:
				bktr->flags |= METEOR_WANT_MASK;
				break;
			}
		}
		return;
	}

	/*
	 * If we have a complete frame.
	 */
	if (!(bktr->flags & METEOR_WANT_MASK)) {
		bktr->frames_captured++;
		/*
		 * post the completion time. 
		 */
		if (bktr->flags & METEOR_WANT_TS) {
			struct timeval *ts;
			
			if ((u_int) bktr->alloc_pages * PAGE_SIZE
			   <= (bktr->frame_size + sizeof(struct timeval))) {
				ts =(struct timeval *)bktr->bigbuf +
				  bktr->frame_size;
				/* doesn't work in synch mode except
				 *  for first frame */
				/* XXX */
				microtime(ts);
			}
		}

		/*
		 * Wake up the user in single capture mode.
		 */
		if (bktr->flags & METEOR_SINGLE) {

			/* stop dma */
			bt848->int_mask = ALL_INTS_DISABLED;

			/* disable risc, leave fifo running */
			bt848->gpio_dma_ctl = FIFO_ENABLED;
			wakeup((caddr_t)bktr);
		}

		/*
		 * If the user requested to be notified via signal,
		 * let them know the frame is complete.
		 */

		if (bktr->proc && !(bktr->signal & METEOR_SIG_MODE_MASK))
			psignal( bktr->proc,
				 bktr->signal&(~METEOR_SIG_MODE_MASK) );

		/*
		 * Reset the want flags if in continuous or
		 * synchronous capture mode.
		 */
/*
* XXX NOTE (Luigi):
* currently we only support 3 capture modes: odd only, even only,
* odd+even interlaced (odd field first). A fourth mode (non interlaced,
* either even OR odd) could provide 60 (50 for PAL) pictures per
* second, but it would require this routine to toggle the desired frame
* each time, and one more different DMA program for the Bt848.
* As a consequence, this fourth mode is currently unsupported.
*/

		if (bktr->flags & (METEOR_CONTIN | METEOR_SYNCAP)) {
			switch(bktr->flags & METEOR_ONLY_FIELDS_MASK) {
			case METEOR_ONLY_ODD_FIELDS:
				bktr->flags |= METEOR_WANT_ODD;
				break;
			case METEOR_ONLY_EVEN_FIELDS:
				bktr->flags |= METEOR_WANT_EVEN;
				break;
			default:
				bktr->flags |= METEOR_WANT_MASK;
				break;
			}
		}
	}

	return;
}


/*---------------------------------------------------------
**
**	BrookTree 848 character device driver routines
**
**---------------------------------------------------------
*/


#define VIDEO_DEV	0x00
#define TUNER_DEV	0x01

/*
 *