Commit 3bd69ad1 authored by Andreas Eversberg's avatar Andreas Eversberg Committed by Karsten Keil

mISDN: Add ISDN sample clock API to mISDN core

Add ISDN sample clock API to mISDN core (new file clock.c)
hfcmulti and mISDNdsp use clock API.
Signed-off-by: default avatarAndreas Eversberg <andreas@eversberg.eu>
Signed-off-by: default avatarKarsten Keil <kkeil@suse.de>
parent 55a6af97
......@@ -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.
......
......@@ -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);
......
......@@ -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
/*
* 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);
......@@ -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)
......
......@@ -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
......@@ -1557,13 +1557,11 @@ dsp_cmx_send_member(struct dsp *dsp, int len, s32 *c, int members)
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) {
......
......@@ -371,6 +371,7 @@ struct mISDN_ctrl_req {
#define DEBUG_L2_TEI 0x00100000
#define DEBUG_L2_TEIFSM 0x00200000
#define DEBUG_TIMER 0x01000000
#define DEBUG_CLOCK 0x02000000
#define mISDN_HEAD_P(s) ((struct mISDNhead *)&s->cb[0])
#define mISDN_HEAD_PRIM(s) (((struct mISDNhead *)&s->cb[0])->prim)
......@@ -384,6 +385,7 @@ struct mISDN_ctrl_req {
struct mISDNchannel;
struct mISDNdevice;
struct mISDNstack;
struct mISDNclock;
struct channel_req {
u_int protocol;
......@@ -460,6 +462,16 @@ struct mISDNstack {
#endif
};
typedef int (clockctl_func_t)(void *, int);
struct mISDNclock {
struct list_head list;
char name[64];
int pri;
clockctl_func_t *ctl;
void *priv;
};
/* global alloc/queue functions */
static inline struct sk_buff *
......@@ -510,8 +522,13 @@ extern int mISDN_register_device(struct mISDNdevice *, char *name);
extern void mISDN_unregister_device(struct mISDNdevice *);
extern int mISDN_register_Bprotocol(struct Bprotocol *);
extern void mISDN_unregister_Bprotocol(struct Bprotocol *);
extern struct mISDNclock *mISDN_register_clock(char *, int, clockctl_func_t *,
void *);
extern void mISDN_unregister_clock(struct mISDNclock *);
extern void set_channel_address(struct mISDNchannel *, u_int, u_int);
extern void mISDN_clock_update(struct mISDNclock *, int, struct timeval *);
extern unsigned short mISDN_clock_get(void);
#endif /* __KERNEL__ */
#endif /* mISDNIF_H */
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment