Commit 87c5fa1b authored by Andreas Eversberg's avatar Andreas Eversberg Committed by Karsten Keil
Browse files

mISDN: Add different different timer settings for hfc-pci 



     - Poll-timer can now be set from 8 to 256 samples, depending on your kernel.
     - If default or 128 is used, the normal controller's clock is used as before.
       Usage: modprobe hfcpci poll=XXX
     - Added some debug code for dsp buffer size. (CMX_DELAY_DEBUG)

    Signed-off-by: default avatarAndreas Eversberg <andreas@eversberg.eu>
    Signed-off-by: default avatarKarsten Keil <kkeil@suse.de>
parent 1b36c78f

drivers/isdn/hardware/mISDN/hfc_pci.h

+0 −1
Original line number Diff line number Diff line
@@ -26,7 +26,6 @@ 
 * change mask and threshold simultaneously

 */

#define HFCPCI_BTRANS_THRESHOLD 128

#define HFCPCI_BTRANS_MAX	256

#define HFCPCI_FILLEMPTY	64

#define HFCPCI_BTRANS_THRESMASK 0x00

drivers/isdn/hardware/mISDN/hfcpci.c

+125 −27
Original line number Diff line number Diff line
@@ -23,6 +23,25 @@ 
 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 * Module options:

 *

 * debug:

 *	NOTE: only one poll value must be given for all cards

 *	See hfc_pci.h for debug flags.

 *

 * poll:

 *	NOTE: only one poll value must be given for all cards

 *	Give the number of samples for each fifo process.

 *	By default 128 is used. Decrease to reduce delay, increase to

 *	reduce cpu load. If unsure, don't mess with it!

 *	A value of 128 will use controller's interrupt. Other values will

 *	use kernel timer, because the controller will not allow lower values

 *	than 128.

 *	Also note that the value depends on the kernel timer frequency.

 *	If kernel uses a frequency of 1000 Hz, steps of 8 samples are possible.

 *	If the kernel uses 100 Hz, steps of 80 samples are possible.

 *	If the kernel uses 300 Hz, steps of about 26 samples are possible.

 *

 */



#include <linux/module.h>
@@ -36,10 +55,14 @@ static const char *hfcpci_revision = "2.0"; 


static int HFC_cnt;

static uint debug;

static uint poll, tics;

struct timer_list hfc_tl;

u32	hfc_jiffies;



MODULE_AUTHOR("Karsten Keil");

MODULE_LICENSE("GPL");

module_param(debug, uint, 0);

module_param(poll, uint, S_IRUGO | S_IWUSR);



static LIST_HEAD(HFClist);

static DEFINE_RWLOCK(HFClock);
@@ -519,9 +542,9 @@ receive_dmsg(struct hfc_pci *hc) 
}



/*

 * check for transparent receive data and read max one threshold size if avail

 * check for transparent receive data and read max one 'poll' size if avail

 */

static int

static void

hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *bz, u_char *bdata)

{

	 __le16 *z1r, *z2r;
@@ -533,17 +556,19 @@ hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *bz, u_char *bdata) 


	fcnt = le16_to_cpu(*z1r) - le16_to_cpu(*z2r);

	if (!fcnt)

		return 0;	/* no data avail */

		return;	/* no data avail */



	if (fcnt <= 0)

		fcnt += B_FIFO_SIZE;	/* bytes actually buffered */

	if (fcnt > HFCPCI_BTRANS_THRESHOLD)

		fcnt = HFCPCI_BTRANS_THRESHOLD;		/* limit size */



	new_z2 = le16_to_cpu(*z2r) + fcnt;	/* new position in fifo */

	if (new_z2 >= (B_FIFO_SIZE + B_SUB_VAL))

		new_z2 -= B_FIFO_SIZE;	/* buffer wrap */



	if (fcnt > MAX_DATA_SIZE) {	/* flush, if oversized */

		*z2r = cpu_to_le16(new_z2);		/* new position */

		return;

	}



	bch->rx_skb = mI_alloc_skb(fcnt, GFP_ATOMIC);

	if (bch->rx_skb) {

		ptr = skb_put(bch->rx_skb, fcnt);
@@ -568,7 +593,6 @@ hfcpci_empty_fifo_trans(struct bchannel *bch, struct bzfifo *bz, u_char *bdata) 
		printk(KERN_WARNING "HFCPCI: receive out of memory\n");



	*z2r = cpu_to_le16(new_z2);		/* new position */

	return 1;

}



/*
@@ -579,12 +603,11 @@ main_rec_hfcpci(struct bchannel *bch) 
{

	struct hfc_pci	*hc = bch->hw;

	int		rcnt, real_fifo;

	int		receive, count = 5;

	int		receive = 0, count = 5;

	struct bzfifo	*bz;

	u_char		*bdata;

	struct zt	*zp;





	if ((bch->nr & 2) && (!hc->hw.bswapped)) {

		bz = &((union fifo_area *)(hc->hw.fifos))->b_chans.rxbz_b2;

		bdata = ((union fifo_area *)(hc->hw.fifos))->b_chans.rxdat_b2;
@@ -624,9 +647,10 @@ Begin: 
			receive = 1;

		else

			receive = 0;

	} else if (test_bit(FLG_TRANSPARENT, &bch->Flags))

		receive = hfcpci_empty_fifo_trans(bch, bz, bdata);

	else

	} else if (test_bit(FLG_TRANSPARENT, &bch->Flags)) {

		hfcpci_empty_fifo_trans(bch, bz, bdata);

		return;

	} else

		receive = 0;

	if (count && receive)

		goto Begin;
@@ -782,9 +806,9 @@ hfcpci_fill_fifo(struct bchannel *bch) 


next_t_frame:

		count = bch->tx_skb->len - bch->tx_idx;

		/* maximum fill shall be HFCPCI_BTRANS_MAX */

		if (count > HFCPCI_BTRANS_MAX - fcnt)

			count = HFCPCI_BTRANS_MAX - fcnt;

		/* maximum fill shall be poll*2 */

		if (count > (poll << 1) - fcnt)

			count = (poll << 1) - fcnt;

		if (count <= 0)

			return;

		/* data is suitable for fifo */
@@ -1164,37 +1188,37 @@ hfcpci_int(int intno, void *dev_id) 
		val &= ~0x80;

		Write_hfc(hc, HFCPCI_CTMT, hc->hw.ctmt | HFCPCI_CLTIMER);

	}

	if (val & 0x08) {

	if (val & 0x08) { 	/* B1 rx */

		bch = Sel_BCS(hc, hc->hw.bswapped ? 2 : 1);

		if (bch)

			main_rec_hfcpci(bch);

		else if (hc->dch.debug)

			printk(KERN_DEBUG "hfcpci spurious 0x08 IRQ\n");

	}

	if (val & 0x10) {

	if (val & 0x10) {	/* B2 rx */

		bch = Sel_BCS(hc, 2);

		if (bch)

			main_rec_hfcpci(bch);

		else if (hc->dch.debug)

			printk(KERN_DEBUG "hfcpci spurious 0x10 IRQ\n");

	}

	if (val & 0x01) {

	if (val & 0x01) {	/* B1 tx */

		bch = Sel_BCS(hc, hc->hw.bswapped ? 2 : 1);

		if (bch)

			tx_birq(bch);

		else if (hc->dch.debug)

			printk(KERN_DEBUG "hfcpci spurious 0x01 IRQ\n");

	}

	if (val & 0x02) {

	if (val & 0x02) {	/* B2 tx */

		bch = Sel_BCS(hc, 2);

		if (bch)

			tx_birq(bch);

		else if (hc->dch.debug)

			printk(KERN_DEBUG "hfcpci spurious 0x02 IRQ\n");

	}

	if (val & 0x20)

	if (val & 0x20)		/* D rx */

		receive_dmsg(hc);

	if (val & 0x04) {	/* dframe transmitted */

	if (val & 0x04) {	/* D tx */

		if (test_and_clear_bit(FLG_BUSY_TIMER, &hc->dch.Flags))

			del_timer(&hc->dch.timer);

		tx_dirq(&hc->dch);
@@ -1203,6 +1227,41 @@ hfcpci_int(int intno, void *dev_id) 
	return IRQ_HANDLED;

}



static void

hfcpci_softirq(void *arg)

{

	u_long		flags;

	struct bchannel	*bch;

	struct hfc_pci	*hc;



	write_lock_irqsave(&HFClock, flags);

	list_for_each_entry(hc, &HFClist, list) {

		if (hc->hw.int_m2 & HFCPCI_IRQ_ENABLE) {

			spin_lock(&hc->lock);

			bch = Sel_BCS(hc, hc->hw.bswapped ? 2 : 1);

			if (bch && bch->state == ISDN_P_B_RAW) { /* B1 rx&tx */

				main_rec_hfcpci(bch);

				tx_birq(bch);

			}

			bch = Sel_BCS(hc, hc->hw.bswapped ? 1 : 2);

			if (bch && bch->state == ISDN_P_B_RAW) { /* B2 rx&tx */

				main_rec_hfcpci(bch);

				tx_birq(bch);

			}

			spin_unlock(&hc->lock);

		}

	}

	write_unlock_irqrestore(&HFClock, flags);



	/* if next event would be in the past ... */

	if ((s32)(hfc_jiffies + tics - jiffies) <= 0)

		hfc_jiffies = jiffies + 1;

	else

		hfc_jiffies += tics;

	hfc_tl.expires = hfc_jiffies;

	add_timer(&hfc_tl);

}



/*

 * timer callback for D-chan busy resolution. Currently no function

 */
@@ -1312,12 +1371,14 @@ mode_hfcpci(struct bchannel *bch, int bc, int protocol) 
		}

		if (fifo2 & 2) {

			hc->hw.fifo_en |= HFCPCI_FIFOEN_B2;

			if (!tics)

				hc->hw.int_m1 |= (HFCPCI_INTS_B2TRANS +

				    HFCPCI_INTS_B2REC);

			hc->hw.ctmt |= 2;

			hc->hw.conn &= ~0x18;

		} else {

			hc->hw.fifo_en |= HFCPCI_FIFOEN_B1;

			if (!tics)

				hc->hw.int_m1 |= (HFCPCI_INTS_B1TRANS +

				    HFCPCI_INTS_B1REC);

			hc->hw.ctmt |= 1;
@@ -1427,6 +1488,7 @@ set_hfcpci_rxtest(struct bchannel *bch, int protocol, int chan) 
		if (chan & 2) {

			hc->hw.sctrl_r |= SCTRL_B2_ENA;

			hc->hw.fifo_en |= HFCPCI_FIFOEN_B2RX;

			if (!tics)

				hc->hw.int_m1 |= HFCPCI_INTS_B2REC;

			hc->hw.ctmt |= 2;

			hc->hw.conn &= ~0x18;
@@ -1436,6 +1498,7 @@ set_hfcpci_rxtest(struct bchannel *bch, int protocol, int chan) 
		} else {

			hc->hw.sctrl_r |= SCTRL_B1_ENA;

			hc->hw.fifo_en |= HFCPCI_FIFOEN_B1RX;

			if (!tics)

				hc->hw.int_m1 |= HFCPCI_INTS_B1REC;

			hc->hw.ctmt |= 1;

			hc->hw.conn &= ~0x03;
@@ -2273,7 +2336,39 @@ HFC_init(void) 
{

	int		err;



	if (!poll)

		poll = HFCPCI_BTRANS_THRESHOLD;



	if (poll != HFCPCI_BTRANS_THRESHOLD) {

		tics = poll * HZ / 8000;

		if (tics < 1)

			tics = 1;

		poll = tics * 8000 / HZ;

		if (poll > 256 || poll < 8) {

			printk(KERN_ERR "%s: Wrong poll value %d not in range "

				"of 8..256.\n", __func__, poll);

			err = -EINVAL;

			return err;

		}

	}

	if (poll != HFCPCI_BTRANS_THRESHOLD) {

		printk(KERN_INFO "%s: Using alternative poll value of %d\n",

			__func__, poll);

		hfc_tl.function = (void *)hfcpci_softirq;

		hfc_tl.data = 0;

		init_timer(&hfc_tl);

		hfc_tl.expires = jiffies + tics;

		hfc_jiffies = hfc_tl.expires;

		add_timer(&hfc_tl);

	} else

		tics = 0; /* indicate the use of controller's timer */



	err = pci_register_driver(&hfc_driver);

	if (err) {

		if (timer_pending(&hfc_tl))

			del_timer(&hfc_tl);

	}



	return err;

}
@@ -2282,6 +2377,9 @@ HFC_cleanup(void) 
{

	struct hfc_pci	*card, *next;



	if (timer_pending(&hfc_tl))

		del_timer(&hfc_tl);



	list_for_each_entry_safe(card, next, &HFClist, list) {

		release_card(card);

	}

drivers/isdn/mISDN/dsp_cmx.c

+23 −0
Original line number Diff line number Diff line
@@ -137,6 +137,7 @@ 
/* #define CMX_CONF_DEBUG */



/*#define CMX_DEBUG * massive read/write pointer output */

/*#define CMX_DELAY_DEBUG * gives rx-buffer delay overview */

/*#define CMX_TX_DEBUG * massive read/write on tx-buffer with content */



static inline int
@@ -1135,6 +1136,25 @@ dsp_cmx_conf(struct dsp *dsp, u32 conf_id) 
	return 0;

}



#ifdef CMX_DELAY_DEBUG

int delaycount;

static void

showdelay(struct dsp *dsp, int samples, int delay)

{

	char bar[] = "--------------------------------------------------|";

	int sdelay;



	delaycount += samples;

	if (delaycount < 8000)

		return;

	delaycount = 0;



	sdelay = delay * 50 / (dsp_poll << 2);



	printk(KERN_DEBUG "DELAY (%s) %3d >%s\n", dsp->name, delay,

		sdelay > 50 ? "..." : bar + 50 - sdelay);

}

#endif



/*

 * audio data is received from card
@@ -1256,6 +1276,9 @@ dsp_cmx_receive(struct dsp *dsp, struct sk_buff *skb) 


	/* increase write-pointer */

	dsp->rx_W = ((dsp->rx_W+len) & CMX_BUFF_MASK);

#ifdef CMX_DELAY_DEBUG

	showdelay(dsp, len, (dsp->rx_W-dsp->rx_R) & CMX_BUFF_MASK);

#endif

}

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