/*
*
* Author Karsten Keil <kkeil@novell.com>
*
* Copyright 2008 by Karsten Keil <kkeil@novell.com>
*
* 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.
*
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mISDNhw.h>
#include "core.h"
#include "layer1.h"
#include "fsm.h"
static u_int *debug;
struct layer1 {
u_long Flags;
struct FsmInst l1m;
struct FsmTimer timer;
int delay;
struct dchannel *dch;
dchannel_l1callback *dcb;
};
#define TIMER3_VALUE 7000
static
struct Fsm l1fsm_s = {NULL, 0, 0, NULL, NULL};
enum {
ST_L1_F2,
ST_L1_F3,
ST_L1_F4,
ST_L1_F5,
ST_L1_F6,
ST_L1_F7,
ST_L1_F8,
};
#define L1S_STATE_COUNT (ST_L1_F8+1)
static char *strL1SState[] =
{
"ST_L1_F2",
"ST_L1_F3",
"ST_L1_F4",
"ST_L1_F5",
"ST_L1_F6",
"ST_L1_F7",
"ST_L1_F8",
};
enum {
EV_PH_ACTIVATE,
EV_PH_DEACTIVATE,
EV_RESET_IND,
EV_DEACT_CNF,
EV_DEACT_IND,
EV_POWER_UP,
EV_ANYSIG_IND,
EV_INFO2_IND,
EV_INFO4_IND,
EV_TIMER_DEACT,
EV_TIMER_ACT,
EV_TIMER3,
};
#define L1_EVENT_COUNT (EV_TIMER3 + 1)
static char *strL1Event[] =
{
"EV_PH_ACTIVATE",
"EV_PH_DEACTIVATE",
"EV_RESET_IND",
"EV_DEACT_CNF",
"EV_DEACT_IND",
"EV_POWER_UP",
"EV_ANYSIG_IND",
"EV_INFO2_IND",
"EV_INFO4_IND",
"EV_TIMER_DEACT",
"EV_TIMER_ACT",
"EV_TIMER3",
};
static void
l1m_debug(struct FsmInst *fi, char *fmt, ...)
{
struct layer1 *l1 = fi->userdata;
va_list va;
va_start(va, fmt);
printk(KERN_DEBUG "%s: ", dev_name(&l1->dch->dev.dev));
vprintk(fmt, va);
printk("\n");
va_end(va);
}
static void
l1_reset(struct FsmInst *fi, int event, void *arg)
{
mISDN_FsmChangeState(fi, ST_L1_F3);
}
static void
l1_deact_cnf(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
mISDN_FsmChangeState(fi, ST_L1_F3);
if (test_bit(FLG_L1_ACTIVATING, &l1->Flags))
l1->dcb(l1->dch, HW_POWERUP_REQ);
}
static void
l1_deact_req_s(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
mISDN_FsmChangeState(fi, ST_L1_F3);
mISDN_FsmRestartTimer(&l1->timer, 550, EV_TIMER_DEACT, NULL, 2);
test_and_set_bit(FLG_L1_DEACTTIMER, &l1->Flags);
}
static void
l1_power_up_s(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
if (test_bit(FLG_L1_ACTIVATING, &l1->Flags)) {
mISDN_FsmChangeState(fi, ST_L1_F4);
l1->dcb(l1->dch, INFO3_P8);
} else
mISDN_FsmChangeState(fi, ST_L1_F3);
}
static void
l1_go_F5(struct FsmInst *fi, int event, void *arg)
{
mISDN_FsmChangeState(fi, ST_L1_F5);
}
static void
l1_go_F8(struct FsmInst *fi, int event, void *arg)
{
mISDN_FsmChangeState(fi, ST_L1_F8);
}
static void
l1_info2_ind(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
mISDN_FsmChangeState(fi, ST_L1_F6);
l1->dcb(l1->dch, INFO3_P8);
}
static void
l1_info4_ind(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
mISDN_FsmChangeState(fi, ST_L1_F7);
l1->dcb(l1->dch, INFO3_P8);
if (test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags))
mISDN_FsmDelTimer(&l1->timer, 4);
if (!test_bit(FLG_L1_ACTIVATED, &l1->Flags)) {
if (test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags))
mISDN_FsmDelTimer(&l1->timer, 3);
mISDN_FsmRestartTimer(&l1->timer, 110, EV_TIMER_ACT, NULL, 2);
test_and_set_bit(FLG_L1_ACTTIMER, &l1->Flags);
}
}
static void
l1_timer3(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags);
if (test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags)) {
if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
l1->dcb(l1->dch, HW_D_NOBLOCKED);
l1->dcb(l1->dch, PH_DEACTIVATE_IND);
}
if (l1->l1m.state != ST_L1_F6) {
mISDN_FsmChangeState(fi, ST_L1_F3);
l1->dcb(l1->dch, HW_POWERUP_REQ);
}
}
static void
l1_timer_act(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
test_and_clear_bit(FLG_L1_ACTTIMER, &l1->Flags);
test_and_set_bit(FLG_L1_ACTIVATED, &l1->Flags);
l1->dcb(l1->dch, PH_ACTIVATE_IND);
}
static void
l1_timer_deact(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags);
test_and_clear_bit(FLG_L1_ACTIVATED, &l1->Flags);
if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
l1->dcb(l1->dch, HW_D_NOBLOCKED);
l1->dcb(l1->dch, PH_DEACTIVATE_IND);
l1->dcb(l1->dch, HW_DEACT_REQ);
}
static void
l1_activate_s(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
mISDN_FsmRestartTimer(&l1->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2);
test_and_set_bit(FLG_L1_T3RUN, &l1->Flags);
l1->dcb(l1->dch, HW_RESET_REQ);
}
static void
l1_activate_no(struct FsmInst *fi, int event, void *arg)
{
struct layer1 *l1 = fi->userdata;
if ((!test_bit(FLG_L1_DEACTTIMER, &l1->Flags)) &&
(!test_bit(FLG_L1_T3RUN, &l1->Flags))) {
test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags);
if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
l1->dcb(l1->dch, HW_D_NOBLOCKED);
l1->dcb(l1->dch, PH_DEACTIVATE_IND);
}
}
static struct FsmNode L1SFnList[] =
{
{ST_L1_F3, EV_PH_ACTIVATE, l1_activate_s},
{ST_L1_F6, EV_PH_ACTIVATE, l1_activate_no},
{ST_L1_F8, EV_PH_ACTIVATE, l1_activate_no},
{ST_L1_F3, EV_RESET_IND, l1_reset},
{ST_L1_F4, EV_RESET_IND, l1_reset},
{ST_L1_F5, EV_RESET_IND, l1_reset},
{ST_L1_F6, EV_RESET_IND, l1_reset},
{ST_L1_F7, EV_RESET_IND, l1_reset},
{ST_L1_F8, EV_RESET_IND, l1_reset},
{ST_L1_F3, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F4, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F5, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F6, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F7, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F8, EV_DEACT_CNF, l1_deact_cnf},
{ST_L1_F6, EV_DEACT_IND, l1_deact_req_s},
{ST_L1_F7, EV_DEACT_IND, l1_deact_req_s},
{ST_L1_F8, EV_DEACT_IND, l1_deact_req_s},
{ST_L1_F3, EV_POWER_UP, l1_power_up_s},
{ST_L1_F4, EV_ANYSIG_IND, l1_go_F5},
{ST_L1_F6, EV_ANYSIG_IND, l1_go_F8},
{ST_L1_F7, EV_ANYSIG_IND, l1_go_F8},
{ST_L1_F3, EV_INFO2_IND, l1_info2_ind},
{ST_L1_F4, EV_INFO2_IND, l1_info2_ind},
{ST_L1_F5, EV_INFO2_IND, l1_info2_ind},
{ST_L1_F7, EV_INFO2_IND, l1_info2_ind},
{ST_L1_F8, EV_INFO2_IND, l1_info2_ind},
{ST_L1_F3, EV_INFO4_IND, l1_info4_ind},
{ST_L1_F4, EV_INFO4_IND, l1_info4_ind},
{ST_L1_F5, EV_INFO4_IND, l1_info4_ind},
{ST_L1_F6, EV_INFO4_IND, l1_info4_ind},
{ST_L1_F8, EV_INFO4_IND, l1_info4_ind},
{ST_L1_F3, EV_TIMER3, l1_timer3},
{ST_L1_F4, EV_TIMER3, l1_timer3},
{ST_L1_F5, EV_TIMER3, l1_timer3},
{ST_L1_F6, EV_TIMER3, l1_timer3},
{ST_L1_F8, EV_TIMER3, l1_timer3},
{ST_L1_F7, EV_TIMER_ACT, l1_timer_act},
{ST_L1_F3, EV_TIMER_DEACT, l1_timer_deact},
{ST_L1_F4, EV_TIMER_DEACT, l1_timer_deact},
{ST_L1_F5, EV_TIMER_DEACT, l1_timer_deact},
{ST_L1_F6, EV_TIMER_DEACT, l1_timer_deact},
{ST_L1_F7, EV_TIMER_DEACT, l1_timer_deact},
{ST_L1_F8, EV_TIMER_DEACT, l1_timer_deact},
};
static void
release_l1(struct layer1 *l1) {
mISDN_FsmDelTimer(&l1->timer, 0);
if (l1->dch)
l1->dch->l1 = NULL;
module_put(THIS_MODULE);
kfree(l1);
}
int
l1_event(struct layer1 *l1, u_int event)
{
int err = 0;
if (!l1)
return -EINVAL;
switch (event) {
case HW_RESET_IND:
mISDN_FsmEvent(&l1->l1m, EV_RESET_IND, NULL);
break;
case HW_DEACT_IND:
mISDN_FsmEvent(&l1->l1m, EV_DEACT_IND, NULL);
break;
case HW_POWERUP_IND:
mISDN_FsmEvent(&l1->l1m, EV_POWER_UP, NULL);
break;
case HW_DEACT_CNF:
mISDN_FsmEvent(&l1->l1m, EV_DEACT_CNF, NULL);
break;
case ANYSIGNAL:
mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL);
break;
case LOSTFRAMING:
mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL);
break;
case INFO2:
mISDN_FsmEvent(&l1->l1m, EV_INFO2_IND, NULL);
break;
case INFO4_P8:
mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL);
break;
case INFO4_P10:
mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL);
break;
case PH_ACTIVATE_REQ:
if (test_bit(FLG_L1_ACTIVATED, &l1->Flags))
l1->dcb(l1->dch, PH_ACTIVATE_IND);
else {
test_and_set_bit(FLG_L1_ACTIVATING, &l1->Flags);
mISDN_FsmEvent(&l1->l1m, EV_PH_ACTIVATE, NULL);
}
break;
case CLOSE_CHANNEL:
release_l1(l1);
break;
default:
if (*debug & DEBUG_L1)
printk(KERN_DEBUG "%s %x unhandled\n",
__func__, event);
err = -EINVAL;
}
return err;
}
EXPORT_SYMBOL(l1_event);
int
create_l1(struct dchannel *dch, dchannel_l1callback *dcb) {
struct layer1 *nl1;
nl1 = kzalloc(sizeof(struct layer1), GFP_ATOMIC);
if (!nl1) {
printk(KERN_ERR "kmalloc struct layer1 failed\n");
return -ENOMEM;
}
nl1->l1m.fsm = &l1fsm_s;
nl1->l1m.state = ST_L1_F3;
nl1->Flags = 0;
nl1->l1m.debug = *debug & DEBUG_L1_FSM;
nl1->l1m.userdata = nl1;
nl1->l1m.userint = 0;
nl1->l1m.printdebug = l1m_debug;
nl1->dch = dch;
nl1->dcb = dcb;
mISDN_FsmInitTimer(&nl1->l1m, &nl1->timer);
__module_get(THIS_MODULE);
dch->l1 = nl1;
return 0;
}
EXPORT_SYMBOL(create_l1);
int
l1_init(u_int *deb)
{
debug = deb;
l1fsm_s.state_count = L1S_STATE_COUNT;
l1fsm_s.event_count = L1_EVENT_COUNT;
l1fsm_s.strEvent = strL1Event;
l1fsm_s.strState = strL1SState;
mISDN_FsmNew(&l1fsm_s, L1SFnList, ARRAY_SIZE(L1SFnList));
return 0;
}
void
l1_cleanup(void)
{
mISDN_FsmFree(&l1fsm_s);
}
