korg1212.c

LINUX 2.6.17.4的源码

        snd_korg1212_setCardState(korg1212, K1212_STATE_SETUP);
        rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_SelectPlayMode,
                                        K1212_MODE_SetupPlay, 0, 0, 0);
	if (rc)
		K1212_DEBUG_PRINTK("K1212_DEBUG: SetupForPlay - RC = %d [%s]\n",
				   rc, stateName[korg1212->cardState]);
        if (rc != K1212_CMDRET_Success) {
                return 1;
        }
        return 0;
}

/* spinlock already held */
static int snd_korg1212_TriggerPlay(struct snd_korg1212 * korg1212)
{
	int rc;

	K1212_DEBUG_PRINTK("K1212_DEBUG: TriggerPlay [%s] %d\n",
			   stateName[korg1212->cardState], korg1212->playcnt);

        if (korg1212->playcnt++)
		return 0;

        snd_korg1212_setCardState(korg1212, K1212_STATE_PLAYING);
        rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_TriggerPlay, 0, 0, 0, 0);
	if (rc)
		K1212_DEBUG_PRINTK("K1212_DEBUG: TriggerPlay - RC = %d [%s]\n",
				   rc, stateName[korg1212->cardState]);
        if (rc != K1212_CMDRET_Success) {
                return 1;
        }
        return 0;
}

/* spinlock already held */
static int snd_korg1212_StopPlay(struct snd_korg1212 * korg1212)
{
	K1212_DEBUG_PRINTK("K1212_DEBUG: StopPlay [%s] %d\n",
			   stateName[korg1212->cardState], korg1212->playcnt);

        if (--(korg1212->playcnt)) 
		return 0;

	korg1212->setcnt = 0;

        if (korg1212->cardState != K1212_STATE_ERRORSTOP)
		snd_korg1212_SendStop(korg1212);

	snd_korg1212_setCardState(korg1212, K1212_STATE_OPEN);
        return 0;
}

static void snd_korg1212_EnableCardInterrupts(struct snd_korg1212 * korg1212)
{
	writel(PCI_INT_ENABLE_BIT            |
	       PCI_DOORBELL_INT_ENABLE_BIT   |
	       LOCAL_INT_ENABLE_BIT          |
	       LOCAL_DOORBELL_INT_ENABLE_BIT |
	       LOCAL_DMA1_INT_ENABLE_BIT,
	       korg1212->statusRegPtr);
}

#if 0 /* not used */

static int snd_korg1212_SetMonitorMode(struct snd_korg1212 *korg1212,
				       enum MonitorModeSelector mode)
{
	K1212_DEBUG_PRINTK("K1212_DEBUG: SetMonitorMode [%s]\n",
			   stateName[korg1212->cardState]);

        switch (mode) {
	case K1212_MONMODE_Off:
		if (korg1212->cardState != K1212_STATE_MONITOR)
			return 0;
		else {
			snd_korg1212_SendStopAndWait(korg1212);
			snd_korg1212_setCardState(korg1212, K1212_STATE_OPEN);
		}
		break;

	case K1212_MONMODE_On:
		if (korg1212->cardState != K1212_STATE_OPEN)
			return 0;
		else {
			int rc;
			snd_korg1212_setCardState(korg1212, K1212_STATE_MONITOR);
			rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_SelectPlayMode,
							  K1212_MODE_MonitorOn, 0, 0, 0);
			if (rc != K1212_CMDRET_Success)
				return 0;
		}
		break;

	default:
		return 0;
        }

        return 1;
}

#endif /* not used */

static inline int snd_korg1212_use_is_exclusive(struct snd_korg1212 *korg1212)
{
	if (korg1212->playback_pid != korg1212->capture_pid &&
	    korg1212->playback_pid >= 0 && korg1212->capture_pid >= 0)
		return 0;

	return 1;
}

static int snd_korg1212_SetRate(struct snd_korg1212 *korg1212, int rate)
{
        static enum ClockSourceIndex s44[] = {
		K1212_CLKIDX_AdatAt44_1K,
		K1212_CLKIDX_WordAt44_1K,
		K1212_CLKIDX_LocalAt44_1K
	};
        static enum ClockSourceIndex s48[] = {
		K1212_CLKIDX_AdatAt48K,
		K1212_CLKIDX_WordAt48K,
		K1212_CLKIDX_LocalAt48K
	};
        int parm, rc;

	if (!snd_korg1212_use_is_exclusive (korg1212))
		return -EBUSY;

	switch (rate) {
	case 44100:
		parm = s44[korg1212->clkSource];
		break;

	case 48000:
		parm = s48[korg1212->clkSource];
		break;

	default:
		return -EINVAL;
	}

        korg1212->clkSrcRate = parm;
        korg1212->clkRate = rate;

	udelay(INTERCOMMAND_DELAY);
	rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_SetClockSourceRate,
					  ClockSourceSelector[korg1212->clkSrcRate],
					  0, 0, 0);
	if (rc)
		K1212_DEBUG_PRINTK("K1212_DEBUG: Set Clock Source Selector - RC = %d [%s]\n",
				   rc, stateName[korg1212->cardState]);

        return 0;
}

static int snd_korg1212_SetClockSource(struct snd_korg1212 *korg1212, int source)
{

	if (source < 0 || source > 2)
		return -EINVAL;

        korg1212->clkSource = source;

        snd_korg1212_SetRate(korg1212, korg1212->clkRate);

        return 0;
}

static void snd_korg1212_DisableCardInterrupts(struct snd_korg1212 *korg1212)
{
	writel(0, korg1212->statusRegPtr);
}

static int snd_korg1212_WriteADCSensitivity(struct snd_korg1212 *korg1212)
{
        struct SensBits  sensVals;
        int       bitPosition;
        int       channel;
        int       clkIs48K;
        int       monModeSet;
        u16       controlValue;    // this keeps the current value to be written to
                                   //  the card's eeprom control register.
        u16       count;
	unsigned long flags;

	K1212_DEBUG_PRINTK("K1212_DEBUG: WriteADCSensivity [%s]\n",
			   stateName[korg1212->cardState]);

        // ----------------------------------------------------------------------------
        // initialize things.  The local init bit is always set when writing to the
        // card's control register.
        // ----------------------------------------------------------------------------
        controlValue = 0;
        SetBitInWord(&controlValue, SET_SENS_LOCALINIT_BITPOS);    // init the control value

        // ----------------------------------------------------------------------------
        // make sure the card is not in monitor mode when we do this update.
        // ----------------------------------------------------------------------------
        if (korg1212->cardState == K1212_STATE_MONITOR || korg1212->idleMonitorOn) {
                monModeSet = 1;
		snd_korg1212_SendStopAndWait(korg1212);
        } else
                monModeSet = 0;

	spin_lock_irqsave(&korg1212->lock, flags);

        // ----------------------------------------------------------------------------
        // we are about to send new values to the card, so clear the new values queued
        // flag.  Also, clear out mailbox 3, so we don't lockup.
        // ----------------------------------------------------------------------------
        writel(0, korg1212->mailbox3Ptr);
        udelay(LOADSHIFT_DELAY);

        // ----------------------------------------------------------------------------
        // determine whether we are running a 48K or 44.1K clock.  This info is used
        // later when setting the SPDIF FF after the volume has been shifted in.
        // ----------------------------------------------------------------------------
        switch (korg1212->clkSrcRate) {
                case K1212_CLKIDX_AdatAt44_1K:
                case K1212_CLKIDX_WordAt44_1K:
                case K1212_CLKIDX_LocalAt44_1K:
                        clkIs48K = 0;
                        break;

                case K1212_CLKIDX_WordAt48K:
                case K1212_CLKIDX_AdatAt48K:
                case K1212_CLKIDX_LocalAt48K:
                default:
                        clkIs48K = 1;
                        break;
        }

        // ----------------------------------------------------------------------------
        // start the update.  Setup the bit structure and then shift the bits.
        // ----------------------------------------------------------------------------
        sensVals.l.v.leftChanId   = SET_SENS_LEFTCHANID;
        sensVals.r.v.rightChanId  = SET_SENS_RIGHTCHANID;
        sensVals.l.v.leftChanVal  = korg1212->leftADCInSens;
        sensVals.r.v.rightChanVal = korg1212->rightADCInSens;

        // ----------------------------------------------------------------------------
        // now start shifting the bits in.  Start with the left channel then the right.
        // ----------------------------------------------------------------------------
        for (channel = 0; channel < 2; channel++) {

                // ----------------------------------------------------------------------------
                // Bring the load/shift line low, then wait - the spec says >150ns from load/
                // shift low to the first rising edge of the clock.
                // ----------------------------------------------------------------------------
                ClearBitInWord(&controlValue, SET_SENS_LOADSHIFT_BITPOS);
                ClearBitInWord(&controlValue, SET_SENS_DATA_BITPOS);
                writew(controlValue, korg1212->sensRegPtr);                          // load/shift goes low
                udelay(LOADSHIFT_DELAY);

                for (bitPosition = 15; bitPosition >= 0; bitPosition--) {       // for all the bits
			if (channel == 0) {
				if (sensVals.l.leftSensBits & (0x0001 << bitPosition))
                                        SetBitInWord(&controlValue, SET_SENS_DATA_BITPOS);     // data bit set high
				else
					ClearBitInWord(&controlValue, SET_SENS_DATA_BITPOS);   // data bit set low
			} else {
                                if (sensVals.r.rightSensBits & (0x0001 << bitPosition))
					SetBitInWord(&controlValue, SET_SENS_DATA_BITPOS);     // data bit set high
				else
					ClearBitInWord(&controlValue, SET_SENS_DATA_BITPOS);   // data bit set low
			}

                        ClearBitInWord(&controlValue, SET_SENS_CLOCK_BITPOS);
                        writew(controlValue, korg1212->sensRegPtr);                       // clock goes low
                        udelay(SENSCLKPULSE_WIDTH);
                        SetBitInWord(&controlValue, SET_SENS_CLOCK_BITPOS);
                        writew(controlValue, korg1212->sensRegPtr);                       // clock goes high
                        udelay(SENSCLKPULSE_WIDTH);
                }

                // ----------------------------------------------------------------------------
                // finish up SPDIF for left.  Bring the load/shift line high, then write a one
                // bit if the clock rate is 48K otherwise write 0.
                // ----------------------------------------------------------------------------
                ClearBitInWord(&controlValue, SET_SENS_DATA_BITPOS);
                ClearBitInWord(&controlValue, SET_SENS_CLOCK_BITPOS);
                SetBitInWord(&controlValue, SET_SENS_LOADSHIFT_BITPOS);
                writew(controlValue, korg1212->sensRegPtr);                   // load shift goes high - clk low
                udelay(SENSCLKPULSE_WIDTH);

                if (clkIs48K)
                        SetBitInWord(&controlValue, SET_SENS_DATA_BITPOS);

                writew(controlValue, korg1212->sensRegPtr);                   // set/clear data bit
                udelay(ONE_RTC_TICK);
                SetBitInWord(&controlValue, SET_SENS_CLOCK_BITPOS);
                writew(controlValue, korg1212->sensRegPtr);                   // clock goes high
                udelay(SENSCLKPULSE_WIDTH);
                ClearBitInWord(&controlValue, SET_SENS_CLOCK_BITPOS);
                writew(controlValue, korg1212->sensRegPtr);                   // clock goes low
                udelay(SENSCLKPULSE_WIDTH);
        }

        // ----------------------------------------------------------------------------
        // The update is complete.  Set a timeout.  This is the inter-update delay.
        // Also, if the card was in monitor mode, restore it.
        // ----------------------------------------------------------------------------
        for (count = 0; count < 10; count++)
                udelay(SENSCLKPULSE_WIDTH);

        if (monModeSet) {
                int rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_SelectPlayMode,
                                K1212_MODE_MonitorOn, 0, 0, 0);
	        if (rc)
			K1212_DEBUG_PRINTK("K1212_DEBUG: WriteADCSensivity - RC = %d [%s]\n",
					   rc, stateName[korg1212->cardState]);
        }

	spin_unlock_irqrestore(&korg1212->lock, flags);

        return 1;
}

static void snd_korg1212_OnDSPDownloadComplete(struct snd_korg1212 *korg1212)
{
        int channel, rc;

        K1212_DEBUG_PRINTK("K1212_DEBUG: DSP download is complete. [%s]\n",
			   stateName[korg1212->cardState]);

        // ----------------------------------------------------
        // tell the card to boot
        // ----------------------------------------------------
        rc = snd_korg1212_Send1212Command(korg1212, K1212_DB_BootFromDSPPage4, 0, 0, 0, 0);

	if (rc)
		K1212_DEBUG_PRINTK("K1212_DEBUG: Boot from Page 4 - RC = %d [%s]\n",
				   rc, stateName[korg1212->cardState]);
	msleep(DSP_BOOT_DELAY_IN_MS);

        // --------------------------------------------------------------------------------
        // Let the card know where all the buffers are.
        // --------------------------------------------------------------------------------
        rc = snd_korg1212_Send1212Command(korg1212,
                        K1212_DB_ConfigureBufferMemory,
                        LowerWordSwap(korg1212->PlayDataPhy),
                        LowerWordSwap(korg1212->RecDataPhy),
                        ((kNumBuffers * kPlayBufferFrames) / 2),   // size given to the card
                                                                   // is based on 2 buffers
                        0
        );

	if (rc)
		K1212_DEBUG_PRINTK("K1212_DEBUG: Configure Buffer Memory - RC = %d [%s]\n",
				   rc, stateName[korg1212->cardState]);

        udelay(INTERCOMMAND_DELAY);

        rc = snd_korg1212_Send1212Command(korg1212,
                        K1212_DB_ConfigureMiscMemory,
                        LowerWordSwap(korg1212->VolumeTablePhy),
                        LowerWordSwap(korg1212->RoutingTablePhy),
                        LowerWordSwap(korg1212->AdatTimeCodePhy),
                        0
        );