416 lines
9.3 KiB
C
416 lines
9.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Author Karsten Keil <kkeil@novell.com>
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*
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* Copyright 2008 by Karsten Keil <kkeil@novell.com>
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*/
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/mISDNhw.h>
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#include "core.h"
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#include "layer1.h"
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#include "fsm.h"
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static u_int *debug;
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struct layer1 {
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u_long Flags;
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struct FsmInst l1m;
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struct FsmTimer timer3;
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struct FsmTimer timerX;
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int delay;
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int t3_value;
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struct dchannel *dch;
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dchannel_l1callback *dcb;
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};
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#define TIMER3_DEFAULT_VALUE 7000
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static
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struct Fsm l1fsm_s = {NULL, 0, 0, NULL, NULL};
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enum {
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ST_L1_F2,
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ST_L1_F3,
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ST_L1_F4,
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ST_L1_F5,
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ST_L1_F6,
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ST_L1_F7,
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ST_L1_F8,
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};
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#define L1S_STATE_COUNT (ST_L1_F8 + 1)
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static char *strL1SState[] =
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{
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"ST_L1_F2",
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"ST_L1_F3",
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"ST_L1_F4",
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"ST_L1_F5",
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"ST_L1_F6",
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"ST_L1_F7",
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"ST_L1_F8",
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};
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enum {
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EV_PH_ACTIVATE,
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EV_PH_DEACTIVATE,
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EV_RESET_IND,
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EV_DEACT_CNF,
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EV_DEACT_IND,
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EV_POWER_UP,
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EV_ANYSIG_IND,
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EV_INFO2_IND,
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EV_INFO4_IND,
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EV_TIMER_DEACT,
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EV_TIMER_ACT,
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EV_TIMER3,
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};
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#define L1_EVENT_COUNT (EV_TIMER3 + 1)
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static char *strL1Event[] =
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{
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"EV_PH_ACTIVATE",
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"EV_PH_DEACTIVATE",
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"EV_RESET_IND",
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"EV_DEACT_CNF",
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"EV_DEACT_IND",
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"EV_POWER_UP",
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"EV_ANYSIG_IND",
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"EV_INFO2_IND",
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"EV_INFO4_IND",
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"EV_TIMER_DEACT",
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"EV_TIMER_ACT",
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"EV_TIMER3",
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};
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static void
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l1m_debug(struct FsmInst *fi, char *fmt, ...)
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{
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struct layer1 *l1 = fi->userdata;
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struct va_format vaf;
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va_list va;
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va_start(va, fmt);
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vaf.fmt = fmt;
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vaf.va = &va;
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printk(KERN_DEBUG "%s: %pV\n", dev_name(&l1->dch->dev.dev), &vaf);
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va_end(va);
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}
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static void
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l1_reset(struct FsmInst *fi, int event, void *arg)
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{
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mISDN_FsmChangeState(fi, ST_L1_F3);
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}
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static void
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l1_deact_cnf(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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mISDN_FsmChangeState(fi, ST_L1_F3);
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if (test_bit(FLG_L1_ACTIVATING, &l1->Flags))
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l1->dcb(l1->dch, HW_POWERUP_REQ);
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}
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static void
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l1_deact_req_s(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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mISDN_FsmChangeState(fi, ST_L1_F3);
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mISDN_FsmRestartTimer(&l1->timerX, 550, EV_TIMER_DEACT, NULL, 2);
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test_and_set_bit(FLG_L1_DEACTTIMER, &l1->Flags);
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}
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static void
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l1_power_up_s(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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if (test_bit(FLG_L1_ACTIVATING, &l1->Flags)) {
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mISDN_FsmChangeState(fi, ST_L1_F4);
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l1->dcb(l1->dch, INFO3_P8);
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} else
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mISDN_FsmChangeState(fi, ST_L1_F3);
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}
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static void
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l1_go_F5(struct FsmInst *fi, int event, void *arg)
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{
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mISDN_FsmChangeState(fi, ST_L1_F5);
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}
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static void
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l1_go_F8(struct FsmInst *fi, int event, void *arg)
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{
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mISDN_FsmChangeState(fi, ST_L1_F8);
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}
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static void
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l1_info2_ind(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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mISDN_FsmChangeState(fi, ST_L1_F6);
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l1->dcb(l1->dch, INFO3_P8);
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}
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static void
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l1_info4_ind(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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mISDN_FsmChangeState(fi, ST_L1_F7);
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l1->dcb(l1->dch, INFO3_P8);
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if (test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags))
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mISDN_FsmDelTimer(&l1->timerX, 4);
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if (!test_bit(FLG_L1_ACTIVATED, &l1->Flags)) {
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if (test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags))
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mISDN_FsmDelTimer(&l1->timer3, 3);
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mISDN_FsmRestartTimer(&l1->timerX, 110, EV_TIMER_ACT, NULL, 2);
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test_and_set_bit(FLG_L1_ACTTIMER, &l1->Flags);
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}
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}
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static void
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l1_timer3(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags);
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if (test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags)) {
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if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
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l1->dcb(l1->dch, HW_D_NOBLOCKED);
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l1->dcb(l1->dch, PH_DEACTIVATE_IND);
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}
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if (l1->l1m.state != ST_L1_F6) {
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mISDN_FsmChangeState(fi, ST_L1_F3);
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/* do not force anything here, we need send INFO 0 */
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}
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}
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static void
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l1_timer_act(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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test_and_clear_bit(FLG_L1_ACTTIMER, &l1->Flags);
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test_and_set_bit(FLG_L1_ACTIVATED, &l1->Flags);
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l1->dcb(l1->dch, PH_ACTIVATE_IND);
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}
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static void
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l1_timer_deact(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags);
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test_and_clear_bit(FLG_L1_ACTIVATED, &l1->Flags);
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if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
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l1->dcb(l1->dch, HW_D_NOBLOCKED);
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l1->dcb(l1->dch, PH_DEACTIVATE_IND);
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l1->dcb(l1->dch, HW_DEACT_REQ);
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}
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static void
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l1_activate_s(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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mISDN_FsmRestartTimer(&l1->timer3, l1->t3_value, EV_TIMER3, NULL, 2);
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test_and_set_bit(FLG_L1_T3RUN, &l1->Flags);
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/* Tell HW to send INFO 1 */
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l1->dcb(l1->dch, HW_RESET_REQ);
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}
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static void
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l1_activate_no(struct FsmInst *fi, int event, void *arg)
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{
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struct layer1 *l1 = fi->userdata;
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if ((!test_bit(FLG_L1_DEACTTIMER, &l1->Flags)) &&
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(!test_bit(FLG_L1_T3RUN, &l1->Flags))) {
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test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags);
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if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags))
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l1->dcb(l1->dch, HW_D_NOBLOCKED);
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l1->dcb(l1->dch, PH_DEACTIVATE_IND);
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}
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}
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static struct FsmNode L1SFnList[] =
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{
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{ST_L1_F3, EV_PH_ACTIVATE, l1_activate_s},
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{ST_L1_F6, EV_PH_ACTIVATE, l1_activate_no},
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{ST_L1_F8, EV_PH_ACTIVATE, l1_activate_no},
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{ST_L1_F3, EV_RESET_IND, l1_reset},
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{ST_L1_F4, EV_RESET_IND, l1_reset},
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{ST_L1_F5, EV_RESET_IND, l1_reset},
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{ST_L1_F6, EV_RESET_IND, l1_reset},
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{ST_L1_F7, EV_RESET_IND, l1_reset},
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{ST_L1_F8, EV_RESET_IND, l1_reset},
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{ST_L1_F3, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F4, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F5, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F6, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F7, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F8, EV_DEACT_CNF, l1_deact_cnf},
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{ST_L1_F6, EV_DEACT_IND, l1_deact_req_s},
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{ST_L1_F7, EV_DEACT_IND, l1_deact_req_s},
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{ST_L1_F8, EV_DEACT_IND, l1_deact_req_s},
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{ST_L1_F3, EV_POWER_UP, l1_power_up_s},
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{ST_L1_F4, EV_ANYSIG_IND, l1_go_F5},
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{ST_L1_F6, EV_ANYSIG_IND, l1_go_F8},
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{ST_L1_F7, EV_ANYSIG_IND, l1_go_F8},
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{ST_L1_F3, EV_INFO2_IND, l1_info2_ind},
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{ST_L1_F4, EV_INFO2_IND, l1_info2_ind},
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{ST_L1_F5, EV_INFO2_IND, l1_info2_ind},
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{ST_L1_F7, EV_INFO2_IND, l1_info2_ind},
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{ST_L1_F8, EV_INFO2_IND, l1_info2_ind},
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{ST_L1_F3, EV_INFO4_IND, l1_info4_ind},
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{ST_L1_F4, EV_INFO4_IND, l1_info4_ind},
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{ST_L1_F5, EV_INFO4_IND, l1_info4_ind},
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{ST_L1_F6, EV_INFO4_IND, l1_info4_ind},
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{ST_L1_F8, EV_INFO4_IND, l1_info4_ind},
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{ST_L1_F3, EV_TIMER3, l1_timer3},
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{ST_L1_F4, EV_TIMER3, l1_timer3},
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{ST_L1_F5, EV_TIMER3, l1_timer3},
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{ST_L1_F6, EV_TIMER3, l1_timer3},
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{ST_L1_F8, EV_TIMER3, l1_timer3},
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{ST_L1_F7, EV_TIMER_ACT, l1_timer_act},
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{ST_L1_F3, EV_TIMER_DEACT, l1_timer_deact},
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{ST_L1_F4, EV_TIMER_DEACT, l1_timer_deact},
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{ST_L1_F5, EV_TIMER_DEACT, l1_timer_deact},
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{ST_L1_F6, EV_TIMER_DEACT, l1_timer_deact},
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{ST_L1_F7, EV_TIMER_DEACT, l1_timer_deact},
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{ST_L1_F8, EV_TIMER_DEACT, l1_timer_deact},
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};
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static void
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release_l1(struct layer1 *l1) {
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mISDN_FsmDelTimer(&l1->timerX, 0);
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mISDN_FsmDelTimer(&l1->timer3, 0);
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if (l1->dch)
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l1->dch->l1 = NULL;
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module_put(THIS_MODULE);
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kfree(l1);
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}
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int
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l1_event(struct layer1 *l1, u_int event)
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{
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int err = 0;
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if (!l1)
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return -EINVAL;
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switch (event) {
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case HW_RESET_IND:
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mISDN_FsmEvent(&l1->l1m, EV_RESET_IND, NULL);
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break;
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case HW_DEACT_IND:
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mISDN_FsmEvent(&l1->l1m, EV_DEACT_IND, NULL);
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break;
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case HW_POWERUP_IND:
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mISDN_FsmEvent(&l1->l1m, EV_POWER_UP, NULL);
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break;
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case HW_DEACT_CNF:
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mISDN_FsmEvent(&l1->l1m, EV_DEACT_CNF, NULL);
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break;
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case ANYSIGNAL:
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mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL);
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break;
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case LOSTFRAMING:
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mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL);
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break;
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case INFO2:
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mISDN_FsmEvent(&l1->l1m, EV_INFO2_IND, NULL);
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break;
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case INFO4_P8:
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mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL);
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break;
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case INFO4_P10:
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mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL);
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break;
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case PH_ACTIVATE_REQ:
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if (test_bit(FLG_L1_ACTIVATED, &l1->Flags))
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l1->dcb(l1->dch, PH_ACTIVATE_IND);
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else {
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test_and_set_bit(FLG_L1_ACTIVATING, &l1->Flags);
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mISDN_FsmEvent(&l1->l1m, EV_PH_ACTIVATE, NULL);
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}
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break;
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case CLOSE_CHANNEL:
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release_l1(l1);
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break;
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default:
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if ((event & ~HW_TIMER3_VMASK) == HW_TIMER3_VALUE) {
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int val = event & HW_TIMER3_VMASK;
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if (val < 5)
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val = 5;
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if (val > 30)
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val = 30;
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l1->t3_value = val;
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break;
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}
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if (*debug & DEBUG_L1)
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printk(KERN_DEBUG "%s %x unhandled\n",
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__func__, event);
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err = -EINVAL;
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}
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return err;
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}
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EXPORT_SYMBOL(l1_event);
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int
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create_l1(struct dchannel *dch, dchannel_l1callback *dcb) {
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struct layer1 *nl1;
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nl1 = kzalloc(sizeof(struct layer1), GFP_ATOMIC);
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if (!nl1) {
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printk(KERN_ERR "kmalloc struct layer1 failed\n");
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return -ENOMEM;
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}
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nl1->l1m.fsm = &l1fsm_s;
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nl1->l1m.state = ST_L1_F3;
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nl1->Flags = 0;
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nl1->t3_value = TIMER3_DEFAULT_VALUE;
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nl1->l1m.debug = *debug & DEBUG_L1_FSM;
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nl1->l1m.userdata = nl1;
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nl1->l1m.userint = 0;
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nl1->l1m.printdebug = l1m_debug;
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nl1->dch = dch;
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nl1->dcb = dcb;
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mISDN_FsmInitTimer(&nl1->l1m, &nl1->timer3);
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mISDN_FsmInitTimer(&nl1->l1m, &nl1->timerX);
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__module_get(THIS_MODULE);
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dch->l1 = nl1;
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return 0;
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}
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EXPORT_SYMBOL(create_l1);
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int
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Isdnl1_Init(u_int *deb)
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{
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debug = deb;
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l1fsm_s.state_count = L1S_STATE_COUNT;
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l1fsm_s.event_count = L1_EVENT_COUNT;
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l1fsm_s.strEvent = strL1Event;
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l1fsm_s.strState = strL1SState;
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return mISDN_FsmNew(&l1fsm_s, L1SFnList, ARRAY_SIZE(L1SFnList));
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}
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void
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Isdnl1_cleanup(void)
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{
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mISDN_FsmFree(&l1fsm_s);
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}
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