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-rw-r--r--drivers/isdn/hardware/mISDN/hfc_multi.h3
-rw-r--r--drivers/isdn/hardware/mISDN/hfcmulti.c45
-rw-r--r--drivers/isdn/mISDN/Makefile2
-rw-r--r--drivers/isdn/mISDN/clock.c216
-rw-r--r--drivers/isdn/mISDN/core.c1
-rw-r--r--drivers/isdn/mISDN/core.h2
-rw-r--r--drivers/isdn/mISDN/dsp_cmx.c40
7 files changed, 277 insertions, 32 deletions
diff --git a/drivers/isdn/hardware/mISDN/hfc_multi.h b/drivers/isdn/hardware/mISDN/hfc_multi.h
index 4aa6a8b41f5..663b77f578b 100644
--- a/drivers/isdn/hardware/mISDN/hfc_multi.h
+++ b/drivers/isdn/hardware/mISDN/hfc_multi.h
@@ -197,6 +197,9 @@ struct hfc_multi {
spinlock_t lock; /* the lock */
+ struct mISDNclock *iclock; /* isdn clock support */
+ int iclock_on;
+
/*
* the channel index is counted from 0, regardless where the channel
* is located on the hfc-channel.
diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 3fc2e9d9534..592db93105f 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -133,6 +133,12 @@
* Give the value of the clock control register (A_ST_CLK_DLY)
* of the S/T interfaces in TE mode.
* This register is needed for the TBR3 certification, so don't change it.
+ *
+ * clock:
+ * NOTE: only one clockdelay_te value must be given once
+ * Selects interface with clock source for mISDN and applications.
+ * Set to card number starting with 1. Set to -1 to disable.
+ * By default, the first card is used as clock source.
*/
/*
@@ -190,12 +196,13 @@ static int nt_t1_count[] = { 3840, 1920, 960, 480, 240, 120, 60, 30 };
*/
static uint type[MAX_CARDS];
-static uint pcm[MAX_CARDS];
-static uint dslot[MAX_CARDS];
+static int pcm[MAX_CARDS];
+static int dslot[MAX_CARDS];
static uint iomode[MAX_CARDS];
static uint port[MAX_PORTS];
static uint debug;
static uint poll;
+static int clock;
static uint timer;
static uint clockdelay_te = CLKDEL_TE;
static uint clockdelay_nt = CLKDEL_NT;
@@ -207,12 +214,13 @@ MODULE_LICENSE("GPL");
MODULE_VERSION(HFC_MULTI_VERSION);
module_param(debug, uint, S_IRUGO | S_IWUSR);
module_param(poll, uint, S_IRUGO | S_IWUSR);
+module_param(clock, int, S_IRUGO | S_IWUSR);
module_param(timer, uint, S_IRUGO | S_IWUSR);
module_param(clockdelay_te, uint, S_IRUGO | S_IWUSR);
module_param(clockdelay_nt, uint, S_IRUGO | S_IWUSR);
module_param_array(type, uint, NULL, S_IRUGO | S_IWUSR);
-module_param_array(pcm, uint, NULL, S_IRUGO | S_IWUSR);
-module_param_array(dslot, uint, NULL, S_IRUGO | S_IWUSR);
+module_param_array(pcm, int, NULL, S_IRUGO | S_IWUSR);
+module_param_array(dslot, int, NULL, S_IRUGO | S_IWUSR);
module_param_array(iomode, uint, NULL, S_IRUGO | S_IWUSR);
module_param_array(port, uint, NULL, S_IRUGO | S_IWUSR);
@@ -2629,6 +2637,7 @@ hfcmulti_interrupt(int intno, void *dev_id)
iqcnt = 0;
}
#endif
+
if (!r_irq_statech &&
!(status & (V_DTMF_STA | V_LOST_STA | V_EXT_IRQSTA |
V_MISC_IRQSTA | V_FR_IRQSTA))) {
@@ -2683,11 +2692,13 @@ hfcmulti_interrupt(int intno, void *dev_id)
plxsd_checksync(hc, 0);
}
}
- if (r_irq_misc & V_TI_IRQ)
+ if (r_irq_misc & V_TI_IRQ) {
+ if (hc->iclock_on)
+ mISDN_clock_update(hc->iclock, poll, NULL);
handle_timer_irq(hc);
+ }
if (r_irq_misc & V_DTMF_IRQ) {
- /* -> DTMF IRQ */
hfcmulti_dtmf(hc);
}
if (r_irq_misc & V_IRQ_PROC) {
@@ -4075,6 +4086,15 @@ hfcm_dctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
return err;
}
+static int
+clockctl(void *priv, int enable)
+{
+ struct hfc_multi *hc = priv;
+
+ hc->iclock_on = enable;
+ return 0;
+}
+
/*
* initialize the card
*/
@@ -4489,10 +4509,14 @@ release_card(struct hfc_multi *hc)
printk(KERN_WARNING "%s: release card (%d) entered\n",
__func__, hc->id);
+ /* unregister clock source */
+ if (hc->iclock)
+ mISDN_unregister_clock(hc->iclock);
+
+ /* disable irq */
spin_lock_irqsave(&hc->lock, flags);
disable_hwirq(hc);
spin_unlock_irqrestore(&hc->lock, flags);
-
udelay(1000);
/* dimm leds */
@@ -5003,6 +5027,10 @@ hfcmulti_init(struct pci_dev *pdev, const struct pci_device_id *ent)
list_add_tail(&hc->list, &HFClist);
spin_unlock_irqrestore(&HFClock, flags);
+ /* use as clock source */
+ if (clock == HFC_cnt + 1)
+ hc->iclock = mISDN_register_clock("HFCMulti", 0, clockctl, hc);
+
/* initialize hardware */
ret_err = init_card(hc);
if (ret_err) {
@@ -5273,6 +5301,9 @@ HFCmulti_init(void)
}
+ if (!clock)
+ clock = 1;
+
err = pci_register_driver(&hfcmultipci_driver);
if (err < 0) {
printk(KERN_ERR "error registering pci driver: %x\n", err);
diff --git a/drivers/isdn/mISDN/Makefile b/drivers/isdn/mISDN/Makefile
index 1cb5e633cf7..0a6bd2a9e73 100644
--- a/drivers/isdn/mISDN/Makefile
+++ b/drivers/isdn/mISDN/Makefile
@@ -8,6 +8,6 @@ obj-$(CONFIG_MISDN_L1OIP) += l1oip.o
# multi objects
-mISDN_core-objs := core.o fsm.o socket.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o
+mISDN_core-objs := core.o fsm.o socket.o clock.o hwchannel.o stack.o layer1.o layer2.o tei.o timerdev.o
mISDN_dsp-objs := dsp_core.o dsp_cmx.o dsp_tones.o dsp_dtmf.o dsp_audio.o dsp_blowfish.o dsp_pipeline.o dsp_hwec.o
l1oip-objs := l1oip_core.o l1oip_codec.o
diff --git a/drivers/isdn/mISDN/clock.c b/drivers/isdn/mISDN/clock.c
new file mode 100644
index 00000000000..44d9c3d5d33
--- /dev/null
+++ b/drivers/isdn/mISDN/clock.c
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2008 by Andreas Eversberg <andreas@eversberg.eu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * Quick API description:
+ *
+ * A clock source registers using mISDN_register_clock:
+ * name = text string to name clock source
+ * priority = value to priorize clock sources (0 = default)
+ * ctl = callback function to enable/disable clock source
+ * priv = private pointer of clock source
+ * return = pointer to clock source structure;
+ *
+ * Note: Callback 'ctl' can be called before mISDN_register_clock returns!
+ * Also it can be called during mISDN_unregister_clock.
+ *
+ * A clock source calls mISDN_clock_update with given samples elapsed, if
+ * enabled. If function call is delayed, tv must be set with the timestamp
+ * of the actual event.
+ *
+ * A clock source unregisters using mISDN_unregister_clock.
+ *
+ * To get current clock, call mISDN_clock_get. The signed short value
+ * counts the number of samples since. Time since last clock event is added.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/spinlock.h>
+#include <linux/mISDNif.h>
+#include "core.h"
+
+static u_int *debug;
+static LIST_HEAD(iclock_list);
+DEFINE_RWLOCK(iclock_lock);
+u16 iclock_count; /* counter of last clock */
+struct timeval iclock_tv; /* time stamp of last clock */
+int iclock_tv_valid; /* already received one timestamp */
+struct mISDNclock *iclock_current;
+
+void
+mISDN_init_clock(u_int *dp)
+{
+ debug = dp;
+ do_gettimeofday(&iclock_tv);
+}
+
+static void
+select_iclock(void)
+{
+ struct mISDNclock *iclock, *bestclock = NULL, *lastclock = NULL;
+ int pri = -128;
+
+ list_for_each_entry(iclock, &iclock_list, list) {
+ if (iclock->pri > pri) {
+ pri = iclock->pri;
+ bestclock = iclock;
+ }
+ if (iclock_current == iclock)
+ lastclock = iclock;
+ }
+ if (lastclock && bestclock != lastclock) {
+ /* last used clock source still exists but changes, disable */
+ if (*debug & DEBUG_CLOCK)
+ printk(KERN_DEBUG "Old clock source '%s' disable.\n",
+ lastclock->name);
+ lastclock->ctl(lastclock->priv, 0);
+ }
+ if (bestclock && bestclock != iclock_current) {
+ /* new clock source selected, enable */
+ if (*debug & DEBUG_CLOCK)
+ printk(KERN_DEBUG "New clock source '%s' enable.\n",
+ bestclock->name);
+ bestclock->ctl(bestclock->priv, 1);
+ }
+ if (bestclock != iclock_current) {
+ /* no clock received yet */
+ iclock_tv_valid = 0;
+ }
+ iclock_current = bestclock;
+}
+
+struct mISDNclock
+*mISDN_register_clock(char *name, int pri, clockctl_func_t *ctl, void *priv)
+{
+ u_long flags;
+ struct mISDNclock *iclock;
+
+ if (*debug & (DEBUG_CORE | DEBUG_CLOCK))
+ printk(KERN_DEBUG "%s: %s %d\n", __func__, name, pri);
+ iclock = kzalloc(sizeof(struct mISDNclock), GFP_ATOMIC);
+ if (!iclock) {
+ printk(KERN_ERR "%s: No memory for clock entry.\n", __func__);
+ return NULL;
+ }
+ strncpy(iclock->name, name, sizeof(iclock->name)-1);
+ iclock->pri = pri;
+ iclock->priv = priv;
+ iclock->ctl = ctl;
+ write_lock_irqsave(&iclock_lock, flags);
+ list_add_tail(&iclock->list, &iclock_list);
+ select_iclock();
+ write_unlock_irqrestore(&iclock_lock, flags);
+ return iclock;
+}
+EXPORT_SYMBOL(mISDN_register_clock);
+
+void
+mISDN_unregister_clock(struct mISDNclock *iclock)
+{
+ u_long flags;
+
+ if (*debug & (DEBUG_CORE | DEBUG_CLOCK))
+ printk(KERN_DEBUG "%s: %s %d\n", __func__, iclock->name,
+ iclock->pri);
+ write_lock_irqsave(&iclock_lock, flags);
+ if (iclock_current == iclock) {
+ if (*debug & DEBUG_CLOCK)
+ printk(KERN_DEBUG
+ "Current clock source '%s' unregisters.\n",
+ iclock->name);
+ iclock->ctl(iclock->priv, 0);
+ }
+ list_del(&iclock->list);
+ select_iclock();
+ write_unlock_irqrestore(&iclock_lock, flags);
+}
+EXPORT_SYMBOL(mISDN_unregister_clock);
+
+void
+mISDN_clock_update(struct mISDNclock *iclock, int samples, struct timeval *tv)
+{
+ u_long flags;
+ struct timeval tv_now;
+ time_t elapsed_sec;
+ int elapsed_8000th;
+
+ write_lock_irqsave(&iclock_lock, flags);
+ if (iclock_current != iclock) {
+ printk(KERN_ERR "%s: '%s' sends us clock updates, but we do "
+ "listen to '%s'. This is a bug!\n", __func__,
+ iclock->name,
+ iclock_current ? iclock_current->name : "nothing");
+ iclock->ctl(iclock->priv, 0);
+ write_unlock_irqrestore(&iclock_lock, flags);
+ return;
+ }
+ if (iclock_tv_valid) {
+ /* increment sample counter by given samples */
+ iclock_count += samples;
+ if (tv) { /* tv must be set, if function call is delayed */
+ iclock_tv.tv_sec = tv->tv_sec;
+ iclock_tv.tv_usec = tv->tv_usec;
+ } else
+ do_gettimeofday(&iclock_tv);
+ } else {
+ /* calc elapsed time by system clock */
+ if (tv) { /* tv must be set, if function call is delayed */
+ tv_now.tv_sec = tv->tv_sec;
+ tv_now.tv_usec = tv->tv_usec;
+ } else
+ do_gettimeofday(&tv_now);
+ elapsed_sec = tv_now.tv_sec - iclock_tv.tv_sec;
+ elapsed_8000th = (tv_now.tv_usec / 125)
+ - (iclock_tv.tv_usec / 125);
+ if (elapsed_8000th < 0) {
+ elapsed_sec -= 1;
+ elapsed_8000th += 8000;
+ }
+ /* add elapsed time to counter and set new timestamp */
+ iclock_count += elapsed_sec * 8000 + elapsed_8000th;
+ iclock_tv.tv_sec = tv_now.tv_sec;
+ iclock_tv.tv_usec = tv_now.tv_usec;
+ iclock_tv_valid = 1;
+ if (*debug & DEBUG_CLOCK)
+ printk("Received first clock from source '%s'.\n",
+ iclock_current ? iclock_current->name : "nothing");
+ }
+ write_unlock_irqrestore(&iclock_lock, flags);
+}
+EXPORT_SYMBOL(mISDN_clock_update);
+
+unsigned short
+mISDN_clock_get(void)
+{
+ u_long flags;
+ struct timeval tv_now;
+ time_t elapsed_sec;
+ int elapsed_8000th;
+ u16 count;
+
+ read_lock_irqsave(&iclock_lock, flags);
+ /* calc elapsed time by system clock */
+ do_gettimeofday(&tv_now);
+ elapsed_sec = tv_now.tv_sec - iclock_tv.tv_sec;
+ elapsed_8000th = (tv_now.tv_usec / 125) - (iclock_tv.tv_usec / 125);
+ if (elapsed_8000th < 0) {
+ elapsed_sec -= 1;
+ elapsed_8000th += 8000;
+ }
+ /* add elapsed time to counter */
+ count = iclock_count + elapsed_sec * 8000 + elapsed_8000th;
+ read_unlock_irqrestore(&iclock_lock, flags);
+ return count;
+}
+EXPORT_SYMBOL(mISDN_clock_get);
+
diff --git a/drivers/isdn/mISDN/core.c b/drivers/isdn/mISDN/core.c
index 43fd97b0fe4..9116f54def2 100644
--- a/drivers/isdn/mISDN/core.c
+++ b/drivers/isdn/mISDN/core.c
@@ -199,6 +199,7 @@ mISDNInit(void)
printk(KERN_INFO "Modular ISDN core version %d.%d.%d\n",
MISDN_MAJOR_VERSION, MISDN_MINOR_VERSION, MISDN_RELEASE);
+ mISDN_init_clock(&debug);
mISDN_initstack(&debug);
err = mISDN_inittimer(&debug);
if (err)
diff --git a/drivers/isdn/mISDN/core.h b/drivers/isdn/mISDN/core.h
index 7da7233b4c1..7ac2f81a812 100644
--- a/drivers/isdn/mISDN/core.h
+++ b/drivers/isdn/mISDN/core.h
@@ -74,4 +74,6 @@ extern void l1_cleanup(void);
extern int Isdnl2_Init(u_int *);
extern void Isdnl2_cleanup(void);
+extern void mISDN_init_clock(u_int *);
+
#endif
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index 04dbb407f7a..efe4c7430e6 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -1557,13 +1557,11 @@ send_packet:
schedule_work(&dsp->workq);
}
-static u32 samplecount;
+static u32 jittercount; /* counter for jitter check */;
struct timer_list dsp_spl_tl;
u32 dsp_spl_jiffies; /* calculate the next time to fire */
-#ifdef UNUSED
-static u32 dsp_start_jiffies; /* jiffies at the time, the calculation begins */
-#endif /* UNUSED */
-static struct timeval dsp_start_tv; /* time at start of calculation */
+static u16 dsp_count; /* last sample count */
+static int dsp_count_valid ; /* if we have last sample count */
void
dsp_cmx_send(void *arg)
@@ -1577,38 +1575,32 @@ dsp_cmx_send(void *arg)
int r, rr;
int jittercheck = 0, delay, i;
u_long flags;
- struct timeval tv;
- u32 elapsed;
- s16 length;
+ u16 length, count;
/* lock */
spin_lock_irqsave(&dsp_lock, flags);
- if (!dsp_start_tv.tv_sec) {
- do_gettimeofday(&dsp_start_tv);
+ if (!dsp_count_valid) {
+ dsp_count = mISDN_clock_get();
length = dsp_poll;
+ dsp_count_valid = 1;
} else {
- do_gettimeofday(&tv);
- elapsed = ((tv.tv_sec - dsp_start_tv.tv_sec) * 8000)
- + ((s32)(tv.tv_usec / 125) - (dsp_start_tv.tv_usec / 125));
- dsp_start_tv.tv_sec = tv.tv_sec;
- dsp_start_tv.tv_usec = tv.tv_usec;
- length = elapsed;
+ count = mISDN_clock_get();
+ length = count - dsp_count;
+ dsp_count = count;
}
if (length > MAX_POLL + 100)
length = MAX_POLL + 100;
-/* printk(KERN_DEBUG "len=%d dsp_count=0x%x.%04x dsp_poll_diff=0x%x.%04x\n",
- length, dsp_count >> 16, dsp_count & 0xffff, dsp_poll_diff >> 16,
- dsp_poll_diff & 0xffff);
- */
+ /* printk(KERN_DEBUG "len=%d dsp_count=0x%x\n", length, dsp_count); */
/*
- * check if jitter needs to be checked
- * (this is about every second = 8192 samples)
+ * check if jitter needs to be checked (this is every second)
*/
- samplecount += length;
- if ((samplecount & 8191) < length)
+ jittercount += length;
+ if (jittercount >= 8000) {
+ jittercount -= 8000;
jittercheck = 1;
+ }
/* loop all members that do not require conference mixing */
list_for_each_entry(dsp, &dsp_ilist, list) {