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path: root/drivers/isdn/mISDN/layer1.c
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-rw-r--r--drivers/isdn/mISDN/layer1.c403
1 files changed, 403 insertions, 0 deletions
diff --git a/drivers/isdn/mISDN/layer1.c b/drivers/isdn/mISDN/layer1.c
new file mode 100644
index 00000000000..fced1a2755f
--- /dev/null
+++ b/drivers/isdn/mISDN/layer1.c
@@ -0,0 +1,403 @@
+/*
+ *
+ * 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/module.h>
+#include <linux/mISDNhw.h>
+#include "layer1.h"
+#include "fsm.h"
+
+static 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: ", l1->dch->dev.name);
+ 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);
+}