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mISDN/drivers/isdn/hardware/mISDN/xhfc_su.c

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/* $Id$
*
* mISDN driver for CologneChip AG's XHFC
*
* Authors : Martin Bachem, Joerg Ciesielski
* Contact : info@colognechip.com
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*******************************************************************************
*
* MODULE PARAMETERS:
* (NOTE: layermask and protocol must be given for all ports,
* not for the number of cards.)
*
* - protocol=<p1>[,p2,p3...]
* Values:
* <bit 3 - 0> D-channel protocol id
* <bit 4 - 4> Flags for special features
* <bit 31 - 5> Spare (set to 0)
*
* D-channel protocol ids
* - 1 1TR6 (not released yet)
* - 2 DSS1
*
* Feature Flags
* <bit 4> 0x0010 Net side stack (NT mode)
* <bit 5> 0x0020 Line Interface Mode (0=S0, 1=Up)
* <bit 6> 0x0040 st line polarity (1=exchanged)
* <bit 7> 0x0080 B channel loop (for layer1 tests)
*
* - layermask=<l1>[,l2,l3...] (32bit):
* mask of layers to be used for D-channel stack
*
* - debug:
* enable debugging (see xhfc_su.h for debug options)
*
*/
#include <linux/mISDNif.h>
#include <linux/config.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <asm/timex.h>
#include "helper.h"
#include "debug.h"
#include "xhfc_su.h"
#include "xhfc24succ.h"
#if BRIDGE == BRIDGE_PCI2PI
#include "xhfc_pci2pi.h"
#endif
static const char xhfc_rev[] = "$Revision$";
#define MAX_CARDS 8
static int card_cnt;
static u_int protocol[MAX_CARDS * MAX_PORT];
static int layermask[MAX_CARDS * MAX_PORT];
#ifdef MODULE
#ifdef MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif
#define MODULE_PARM_T "1-8i"
MODULE_PARM(debug, "1i");
MODULE_PARM(protocol, MODULE_PARM_T);
MODULE_PARM(layermask, MODULE_PARM_T);
#endif
static mISDNobject_t hw_mISDNObj;
static int debug = 0;
static void release_card(xhfc_hw * hw);
/****************************************************/
/* Physical S/U commands to control Line Interface */
/****************************************************/
static void
xhfc_ph_command(channel_t * dch, u_char command)
{
xhfc_hw *hw = dch->hw;
xhfc_port_t *port = hw->chan[dch->channel].port;
if (dch->debug)
mISDN_debugprint(&dch->inst,
"%s command(%i) channel(%i) port(%i)",
__FUNCTION__, command, dch->channel,
port->idx);
switch (command) {
case HFC_L1_ACTIVATE_TE:
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES)) {
mISDN_debugprint(&dch->inst,
"HFC_L1_ACTIVATE_TE channel(%i))",
dch->channel);
}
write_xhfc(hw, R_SU_SEL, port->idx);
write_xhfc(hw, A_SU_WR_STA, STA_ACTIVATE);
break;
case HFC_L1_FORCE_DEACTIVATE_TE:
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"HFC_L1_FORCE_DEACTIVATE_TE channel(%i)",
dch->channel);
write_xhfc(hw, R_SU_SEL, port->idx);
write_xhfc(hw, A_SU_WR_STA, STA_DEACTIVATE);
break;
case HFC_L1_ACTIVATE_NT:
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"HFC_L1_ACTIVATE_NT channel(%i)",
dch->channel);
write_xhfc(hw, R_SU_SEL, port->idx);
write_xhfc(hw, A_SU_WR_STA,
STA_ACTIVATE | M_SU_SET_G2_G3);
break;
case HFC_L1_DEACTIVATE_NT:
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"HFC_L1_DEACTIVATE_NT channel(%i)",
dch->channel);
write_xhfc(hw, R_SU_SEL, port->idx);
write_xhfc(hw, A_SU_WR_STA, STA_DEACTIVATE);
break;
case HFC_L1_TESTLOOP_B1:
setup_fifo(hw, port->idx*8, 0xC6, 0, 0, 0); /* connect B1-SU RX with PCM TX */
setup_fifo(hw, port->idx*8+1, 0xC6, 0, 0, 0); /* connect B1-SU TX with PCM RX */
write_xhfc(hw, R_SLOT, port->idx*8); /* PCM timeslot B1 TX */
write_xhfc(hw, A_SL_CFG, port->idx*8 + 0x80); /* enable B1 TX timeslot on STIO1 */
write_xhfc(hw, R_SLOT, port->idx*8+1); /* PCM timeslot B1 RX */
write_xhfc(hw, A_SL_CFG, port->idx*8+1 + 0xC0); /* enable B1 RX timeslot on STIO1*/
setup_su(hw, port->idx, 0, 1);
break;
case HFC_L1_TESTLOOP_B2:
setup_fifo(hw, port->idx*8+2, 0xC6, 0, 0, 0); /* connect B2-SU RX with PCM TX */
setup_fifo(hw, port->idx*8+3, 0xC6, 0, 0, 0); /* connect B2-SU TX with PCM RX */
write_xhfc(hw, R_SLOT, port->idx*8+2); /* PCM timeslot B2 TX */
write_xhfc(hw, A_SL_CFG, port->idx*8+2 + 0x80); /* enable B2 TX timeslot on STIO1 */
write_xhfc(hw, R_SLOT, port->idx*8+3); /* PCM timeslot B2 RX */
write_xhfc(hw, A_SL_CFG, port->idx*8+3 + 0xC0); /* enable B2 RX timeslot on STIO1*/
setup_su(hw, port->idx, 1, 1);
break;
}
}
static void
l1_timer_start_t3(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
if (!timer_pending(&port->t3_timer)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i)",
__FUNCTION__, dch->channel, dch->state);
port->t3_timer.expires = jiffies + (XHFC_TIMER_T3 * HZ) / 1000;
add_timer(&port->t3_timer);
}
}
static void
l1_timer_stop_t3(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
clear_bit(HFC_L1_ACTIVATING, &port->l1_flags);
if (timer_pending(&port->t3_timer)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i)",
__FUNCTION__, dch->channel, dch->state);
del_timer(&port->t3_timer);
}
}
/***********************************/
/* called when timer t3 expires */
/* -> activation failed */
/* force clean L1 deactivation */
/***********************************/
static void
l1_timer_expire_t3(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i), "
"l1->l2 (PH_DEACTIVATE | INDICATION)",
__FUNCTION__, dch->channel, dch->state);
clear_bit(HFC_L1_ACTIVATING, &port->l1_flags),
xhfc_ph_command(dch, HFC_L1_FORCE_DEACTIVATE_TE);
mISDN_queue_data(&dch->inst, FLG_MSG_UP,
(PH_DEACTIVATE | INDICATION),
0, 0, NULL, 0);
mISDN_queue_data(&dch->inst, dch->inst.id | MSG_BROADCAST,
MGR_SHORTSTATUS | INDICATION, SSTATUS_L1_DEACTIVATED,
0, NULL, 0);
}
static void
l1_timer_start_t4(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
set_bit(HFC_L1_DEACTTIMER, &port->l1_flags);
if (!timer_pending(&port->t4_timer)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i)",
__FUNCTION__, dch->channel, dch->state);
port->t4_timer.expires =
jiffies + (XHFC_TIMER_T4 * HZ) / 1000;
add_timer(&port->t4_timer);
}
}
static void
l1_timer_stop_t4(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
clear_bit(HFC_L1_DEACTTIMER, &port->l1_flags);
if (timer_pending(&port->t4_timer)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i)",
__FUNCTION__, dch->channel, dch->state);
del_timer(&port->t4_timer);
}
}
/*****************************************************/
/* called when timer t4 expires */
/* send (PH_DEACTIVATE | INDICATION) to upper layer */
/*****************************************************/
static void
l1_timer_expire_t4(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s channel(%i) state(F%i), "
"l1->l2 (PH_DEACTIVATE | INDICATION)",
__FUNCTION__, dch->channel, dch->state);
clear_bit(HFC_L1_DEACTTIMER, &port->l1_flags);
mISDN_queue_data(&dch->inst, FLG_MSG_UP,
(PH_DEACTIVATE | INDICATION), 0, 0, NULL, 0);
mISDN_queue_data(&dch->inst, dch->inst.id | MSG_BROADCAST,
MGR_SHORTSTATUS | INDICATION, SSTATUS_L1_DEACTIVATED,
0, NULL, 0);
}
/*********************************/
/* Line Interface State handler */
/*********************************/
static void
su_new_state(channel_t * dch)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
u_int prim = 0;
if (port->mode & PORT_MODE_TE) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst, "%s: TE F%d",
__FUNCTION__, dch->state);
if ((dch->state <= 3) || (dch->state >= 7))
l1_timer_stop_t3(dch);
switch (dch->state) {
case (3):
if (test_and_clear_bit(HFC_L1_ACTIVATED, &port->l1_flags))
l1_timer_start_t4(dch);
return;
case (7):
if (timer_pending(&port->t4_timer))
l1_timer_stop_t4(dch);
if (test_and_clear_bit(HFC_L1_ACTIVATING, &port->l1_flags)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l1->l2 (PH_ACTIVATE | CONFIRM)");
set_bit(HFC_L1_ACTIVATED, &port->l1_flags);
prim = PH_ACTIVATE | CONFIRM;
} else {
if (!(test_and_set_bit(HFC_L1_ACTIVATED, &port->l1_flags))) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l1->l2 (PH_ACTIVATE | INDICATION)");
prim = PH_ACTIVATE | INDICATION;
} else {
// L1 was already activated (e.g. F8->F7)
return;
}
}
mISDN_queue_data(&dch->inst, dch->inst.id | MSG_BROADCAST,
MGR_SHORTSTATUS | INDICATION, SSTATUS_L1_ACTIVATED,
0, NULL, 0);
break;
case (8):
l1_timer_stop_t4(dch);
return;
/*
case (0):
case (1):
case (2):
case (4):
case (5):
case (6):
*/
default:
return;
}
} else if (port->mode & PORT_MODE_NT) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst, "%s: NT G%d",
__FUNCTION__, dch->state);
switch (dch->state) {
case (1):
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
port->nt_timer = 0;
port->mode &= ~NT_TIMER;
prim = (PH_DEACTIVATE | INDICATION);
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l1->l2 (PH_DEACTIVATE | INDICATION)");
break;
case (2):
if (port->nt_timer < 0) {
port->nt_timer = 0;
port->mode &= ~NT_TIMER;
xhfc_ph_command(dch, HFC_L1_DEACTIVATE_NT);
} else {
port->nt_timer = NT_T1_COUNT;
port->mode |= NT_TIMER;
write_xhfc(hw, R_SU_SEL, port->idx);
write_xhfc(hw, A_SU_WR_STA, M_SU_SET_G2_G3);
}
return;
case (3):
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
port->nt_timer = 0;
port->mode &= ~NT_TIMER;
prim = (PH_ACTIVATE | INDICATION);
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l1->l2 (PH_ACTIVATE | INDICATION)");
break;
case (4):
port->nt_timer = 0;
port->mode &= ~NT_TIMER;
return;
default:
break;
}
mISDN_queue_data(&dch->inst, dch->inst.id | MSG_BROADCAST,
MGR_SHORTSTATUS | INDICATION, test_bit(FLG_ACTIVE, &dch->Flags) ?
SSTATUS_L1_ACTIVATED : SSTATUS_L1_DEACTIVATED,
0, NULL, 0);
}
mISDN_queue_data(&dch->inst, FLG_MSG_UP, prim, 0, 0, NULL, 0);
}
/*************************************/
/* Layer 1 D-channel hardware access */
/*************************************/
static int
handle_dmsg(channel_t *dch, struct sk_buff *skb)
{
xhfc_hw * hw = dch->hw;
xhfc_port_t * port = hw->chan[dch->channel].port;
int ret = 0;
mISDN_head_t *hh = mISDN_HEAD_P(skb);
switch (hh->prim) {
case (PH_ACTIVATE | REQUEST):
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l2->l1 (PH_ACTIVATE | REQUEST)");
if (port->mode & PORT_MODE_TE) {
if (test_bit(HFC_L1_ACTIVATED, &port->l1_flags)) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"l1->l2 (PH_ACTIVATE | CONFIRM)");
mISDN_queue_data(&dch->inst, FLG_MSG_UP,
PH_ACTIVATE | CONFIRM,
0, 0, NULL, 0);
} else {
test_and_set_bit(HFC_L1_ACTIVATING, &port->l1_flags);
xhfc_ph_command(dch, HFC_L1_ACTIVATE_TE);
l1_timer_start_t3(dch);
}
} else {
xhfc_ph_command(dch, HFC_L1_ACTIVATE_NT);
}
break;
case (PH_DEACTIVATE | REQUEST):
if (port->mode & PORT_MODE_TE) {
// no deact request in TE mode !
ret = -EINVAL;
} else {
xhfc_ph_command(dch, HFC_L1_DEACTIVATE_NT);
}
break;
case (MDL_FINDTEI | REQUEST):
return(mISDN_queue_up(&dch->inst, 0, skb));
break;
}
return(ret);
}
/*************************************/
/* Layer 1 B-channel hardware access */
/*************************************/
static int
handle_bmsg(channel_t *bch, struct sk_buff *skb)
{
xhfc_hw *hw = bch->hw;
int ret = 0;
mISDN_head_t *hh = mISDN_HEAD_P(skb);
u_long flags;
if ((hh->prim == (PH_ACTIVATE | REQUEST)) ||
(hh->prim == (DL_ESTABLISH | REQUEST))) {
if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) {
spin_lock_irqsave(&hw->lock, flags);
if (bch->inst.pid.protocol[2] == ISDN_PID_L2_B_TRANS)
test_and_set_bit(FLG_L2DATA, &bch->Flags);
ret =
setup_channel(hw, bch->channel,
bch->inst.pid.protocol[1]);
spin_unlock_irqrestore(&hw->lock, flags);
}
#ifdef FIXME
if (bch->inst.pid.protocol[2] == ISDN_PID_L2_B_RAWDEV)
if (bch->dev)
if_link(&bch->dev->rport.pif,
hh->prim | CONFIRM, 0, 0, NULL, 0);
#endif
skb_trim(skb, 0);
return(mISDN_queueup_newhead(&bch->inst, 0, hh->prim | CONFIRM, ret, skb));
} else if ((hh->prim == (PH_DEACTIVATE | REQUEST)) ||
(hh->prim == (DL_RELEASE | REQUEST)) ||
((hh->prim == (PH_CONTROL | REQUEST) && (hh->dinfo == HW_DEACTIVATE)))) {
spin_lock_irqsave(&hw->lock, flags);
if (test_and_clear_bit(FLG_TX_NEXT, &bch->Flags)) {
dev_kfree_skb(bch->next_skb);
bch->next_skb = NULL;
}
if (bch->tx_skb) {
dev_kfree_skb(bch->tx_skb);
bch->tx_skb = NULL;
}
bch->tx_idx = 0;
if (bch->rx_skb) {
dev_kfree_skb(bch->rx_skb);
bch->rx_skb = NULL;
}
test_and_clear_bit(FLG_L2DATA, &bch->Flags);
test_and_clear_bit(FLG_TX_BUSY, &bch->Flags);
setup_channel(hw, bch->channel, ISDN_PID_NONE);
test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
spin_unlock_irqrestore(&hw->lock, flags);
skb_trim(skb, 0);
if (hh->prim != (PH_CONTROL | REQUEST)) {
#ifdef FIXME
if (bch->inst.pid.protocol[2] == ISDN_PID_L2_B_RAWDEV)
if (bch->dev)
if_link(&bch->dev->rport.pif,
hh->prim | CONFIRM, 0, 0, NULL, 0);
#endif
if (!mISDN_queueup_newhead(&bch->inst, 0, hh->prim | CONFIRM, 0, skb))
return(0);
}
} else {
printk(KERN_WARNING "%s %s: unknown prim(%x)\n",
hw->card_name, __FUNCTION__, hh->prim);
}
if (!ret)
dev_kfree_skb(skb);
return (ret);
}
/***********************************************/
/* handle Layer2 -> Layer 1 D-Channel messages */
/***********************************************/
static int
xhfc_l2l1(mISDNinstance_t *inst, struct sk_buff *skb)
{
channel_t *chan = container_of(inst, channel_t, inst);
mISDN_head_t *hh = mISDN_HEAD_P(skb);
xhfc_hw *hw = inst->privat;
int ret = 0;
u_long flags;
if ((hh->prim == PH_DATA_REQ) || (hh->prim == DL_DATA_REQ)) {
spin_lock_irqsave(inst->hwlock, flags);
ret = channel_senddata(chan, hh->dinfo, skb);
if (ret > 0) { /* direct TX */
tasklet_schedule(&hw->tasklet);
// printk ("PH_DATA_REQ: %i bytes in channel(%i)\n", ret, chan->channel);
ret = 0;
}
spin_unlock_irqrestore(inst->hwlock, flags);
return(ret);
}
if (test_bit(FLG_DCHANNEL, &chan->Flags)) {
ret = handle_dmsg(chan, skb);
if (ret != -EAGAIN)
return(ret);
ret = -EINVAL;
}
if (test_bit(FLG_BCHANNEL, &chan->Flags)) {
ret = handle_bmsg(chan, skb);
if (ret != -EAGAIN)
return(ret);
ret = -EINVAL;
}
if (!ret)
dev_kfree_skb(skb);
return(ret);
}
static int
xhfc_manager(void *data, u_int prim, void *arg)
{
xhfc_hw *hw = NULL;
mISDNinstance_t *inst = data;
struct sk_buff *skb;
int channel = -1;
int i;
channel_t *chan = NULL;
u_long flags;
if (!data) {
MGR_HASPROTOCOL_HANDLER(prim, arg, &hw_mISDNObj)
printk(KERN_ERR "%s %s: no data prim %x arg %p\n",
hw->card_name, __FUNCTION__, prim, arg);
return (-EINVAL);
}
spin_lock_irqsave(&hw_mISDNObj.lock, flags);
/* find channel and card */
list_for_each_entry(hw, &hw_mISDNObj.ilist, list) {
i = 0;
while (i < MAX_CHAN) {
if (hw->chan[i].ch.Flags &&
&hw->chan[i].ch.inst == inst) {
channel = i;
chan = &hw->chan[i].ch;
break;
}
i++;
}
if (channel >= 0)
break;
}
spin_unlock_irqrestore(&hw_mISDNObj.lock, flags);
if (channel < 0) {
printk(KERN_ERR
"%s: no card/channel found data %p prim %x arg %p\n",
__FUNCTION__, data, prim, arg);
return (-EINVAL);
}
switch (prim) {
case MGR_REGLAYER | CONFIRM:
mISDN_setpara(chan, &inst->st->para);
break;
case MGR_UNREGLAYER | REQUEST:
if ((skb = create_link_skb(PH_CONTROL | REQUEST,
HW_DEACTIVATE, 0, NULL, 0))) {
if (xhfc_l2l1(inst, skb))
dev_kfree_skb(skb);
} else
printk(KERN_WARNING "no SKB in %s MGR_UNREGLAYER | REQUEST\n", __FUNCTION__);
hw_mISDNObj.ctrl(inst, MGR_UNREGLAYER | REQUEST, NULL);
break;
case MGR_CLRSTPARA | INDICATION:
arg = NULL;
case MGR_ADDSTPARA | INDICATION:
mISDN_setpara(chan, arg);
break;
case MGR_RELEASE | INDICATION:
if (channel == 2) {
release_card(hw);
} else {
hw_mISDNObj.refcnt--;
}
break;
case MGR_SETSTACK | INDICATION:
if ((channel != 2) && (inst->pid.global == 2)) {
if ((skb = create_link_skb(PH_ACTIVATE | REQUEST,
0, 0, NULL, 0))) {
if (xhfc_l2l1(inst, skb))
dev_kfree_skb(skb);
}
if (inst->pid.protocol[2] == ISDN_PID_L2_B_TRANS)
mISDN_queue_data(inst, FLG_MSG_UP, DL_ESTABLISH | INDICATION,
0, 0, NULL, 0);
else
mISDN_queue_data(inst, FLG_MSG_UP, PH_ACTIVATE | INDICATION,
0, 0, NULL, 0);
}
break;
case MGR_GLOBALOPT | REQUEST:
if (arg) {
// FIXME: detect cards with HEADSET
u_int *gopt = arg;
*gopt = GLOBALOPT_INTERNAL_CTRL |
GLOBALOPT_EXTERNAL_EQUIPMENT |
GLOBALOPT_HANDSET;
} else
return (-EINVAL);
break;
case MGR_SELCHANNEL | REQUEST:
// no special procedure
return (-EINVAL);
PRIM_NOT_HANDLED(MGR_CTRLREADY | INDICATION);
default:
printk(KERN_WARNING "%s %s: prim %x not handled\n",
hw->card_name, __FUNCTION__, prim);
return (-EINVAL);
}
return (0);
}
/***********************************/
/* check if new buffer for channel */
/* is waitinng is transmitt queue */
/***********************************/
int
next_tx_frame(xhfc_hw * hw, __u8 channel)
{
channel_t *ch = &hw->chan[channel].ch;
if (ch->tx_skb)
dev_kfree_skb(ch->tx_skb);
if (test_and_clear_bit(FLG_TX_NEXT, &ch->Flags)) {
ch->tx_skb = ch->next_skb;
if (ch->tx_skb) {
mISDN_head_t *hh = mISDN_HEAD_P(ch->tx_skb);
ch->next_skb = NULL;
test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
ch->tx_idx = 0;
queue_ch_frame(ch, CONFIRM, hh->dinfo, NULL);
return (1);
} else {
printk(KERN_WARNING
"%s channel(%i) TX_NEXT without skb\n",
hw->card_name, channel);
test_and_clear_bit(FLG_TX_NEXT, &ch->Flags);
}
} else
ch->tx_skb = NULL;
test_and_clear_bit(FLG_TX_BUSY, &ch->Flags);
return (0);
}
static inline void
xhfc_waitbusy(xhfc_hw * hw)
{
while (read_xhfc(hw, R_STATUS) & M_BUSY);
}
static inline void
xhfc_selfifo(xhfc_hw * hw, __u8 fifo)
{
write_xhfc(hw, R_FIFO, fifo);
xhfc_waitbusy(hw);
}
static inline void
xhfc_inc_f(xhfc_hw * hw)
{
write_xhfc(hw, A_INC_RES_FIFO, M_INC_F);
xhfc_waitbusy(hw);
}
static inline void
xhfc_resetfifo(xhfc_hw * hw)
{
write_xhfc(hw, A_INC_RES_FIFO, M_RES_FIFO | M_RES_FIFO_ERR);
xhfc_waitbusy(hw);
}
/**************************/
/* fill fifo with TX data */
/**************************/
void
xhfc_write_fifo(xhfc_hw * hw, __u8 channel)
{
__u8 fcnt, tcnt, i;
__u8 free;
__u8 f1, f2;
__u8 fstat;
__u8 *data;
int remain;
channel_t *ch = &hw->chan[channel].ch;
send_buffer:
if (!ch->tx_skb)
return;
remain = ch->tx_skb->len - ch->tx_idx;
if (remain <= 0)
return;
xhfc_selfifo(hw, (channel * 2));
fstat = read_xhfc(hw, A_FIFO_STA);
free = (hw->max_z - (read_xhfc(hw, A_USAGE)));
tcnt = (free >= remain) ? remain : free;
f1 = read_xhfc(hw, A_F1);
f2 = read_xhfc(hw, A_F2);
fcnt = 0x07 - ((f1 - f2) & 0x07); /* free frame count in tx fifo */
if (debug & DEBUG_HFC_FIFO) {
mISDN_debugprint(&ch->inst,
"%s channel(%i) len(%i) idx(%i) f1(%i) f2(%i) fcnt(%i) tcnt(%i) free(%i) fstat(%i)",
__FUNCTION__, channel, ch->tx_skb->len, ch->tx_idx,
f1, f2, fcnt, tcnt, free, fstat);
}
/* check for fifo underrun during frame transmission */
fstat = read_xhfc(hw, A_FIFO_STA);
if (fstat & M_FIFO_ERR) {
if (debug & DEBUG_HFC_FIFO_ERR) {
mISDN_debugprint(&ch->inst,
"%s transmit fifo channel(%i) underrun idx(%i), A_FIFO_STA(0x%02x)",
__FUNCTION__, channel,
ch->tx_idx, fstat);
}
write_xhfc(hw, A_INC_RES_FIFO, M_RES_FIFO_ERR);
/* restart frame transmission */
if ((test_bit(FLG_HDLC, &ch->Flags)) && ch->tx_idx) {
ch->tx_idx = 0;
goto send_buffer;
}
}
if (free && fcnt && tcnt) {
data = ch->tx_skb->data + ch->tx_idx;
ch->tx_idx += tcnt;
if (debug & DEBUG_HFC_FIFO) {
printk("%s channel(%i) writing: ",
hw->card_name, channel);
i=0;
while (i<tcnt)
printk("%02x ", *(data+(i++)));
printk ("\n");
}
/* write data to FIFO */
i=0;
while (i<tcnt) {
if ((tcnt-i) >= 4) {
write32_xhfc(hw, A_FIFO_DATA, *((__u32 *) (data+i)));
i += 4;
} else {
write_xhfc(hw, A_FIFO_DATA, *(data+i));
i++;
}
}
if (ch->tx_idx == ch->tx_skb->len) {
if (test_bit(FLG_HDLC, &ch->Flags)) {
/* terminate frame */
xhfc_inc_f(hw);
} else {
xhfc_selfifo(hw, (channel * 2));
}
/* check for fifo underrun during frame transmission */
fstat = read_xhfc(hw, A_FIFO_STA);
if (fstat & M_FIFO_ERR) {
if (debug & DEBUG_HFC_FIFO_ERR) {
mISDN_debugprint(&ch->inst,
"%s transmit fifo channel(%i) underrun "
"during transmission, A_FIFO_STA(0x%02x)\n",
__FUNCTION__,
channel,
fstat);
}
write_xhfc(hw, A_INC_RES_FIFO, M_RES_FIFO_ERR);
if (test_bit(FLG_HDLC, &ch->Flags)) {
// restart frame transmission
ch->tx_idx = 0;
goto send_buffer;
}
}
if (next_tx_frame(hw, channel)) {
if (debug & DEBUG_HFC_BTRACE)
mISDN_debugprint(&ch->inst,
"channel(%i) has next_tx_frame",
channel);
if ((free - tcnt) > 8) {
if (debug & DEBUG_HFC_BTRACE)
mISDN_debugprint(&ch->inst,
"channel(%i) continue B-TX immediatetly",
channel);
goto send_buffer;
}
}
} else {
/* tx buffer not complete, but fifo filled to maximum */
xhfc_selfifo(hw, (channel * 2));
}
}
}
/****************************/
/* read RX data out of fifo */
/****************************/
void
xhfc_read_fifo(xhfc_hw * hw, __u8 channel)
{
__u8 f1=0, f2=0, z1=0, z2=0;
__u8 fstat = 0;
int i;
int rcnt; /* read rcnt bytes out of fifo */
__u8 *data; /* new data pointer */
struct sk_buff *skb; /* data buffer for upper layer */
channel_t *ch = &hw->chan[channel].ch;
receive_buffer:
xhfc_selfifo(hw, (channel * 2) + 1);
fstat = read_xhfc(hw, A_FIFO_STA);
if (fstat & M_FIFO_ERR) {
if (debug & DEBUG_HFC_FIFO_ERR)
mISDN_debugprint(&ch->inst,
"RX fifo overflow channel(%i), "
"A_FIFO_STA(0x%02x) f0cnt(%i)",
channel, fstat, hw->f0_akku);
write_xhfc(hw, A_INC_RES_FIFO, M_RES_FIFO_ERR);
}
if (test_bit(FLG_HDLC, &ch->Flags)) {
/* hdlc rcnt */
f1 = read_xhfc(hw, A_F1);
f2 = read_xhfc(hw, A_F2);
z1 = read_xhfc(hw, A_Z1);
z2 = read_xhfc(hw, A_Z2);
rcnt = (z1 - z2) & hw->max_z;
if (f1 != f2)
rcnt++;
} else {
/* transparent rcnt */
rcnt = read_xhfc(hw, A_USAGE) - 1;
}
if (debug & DEBUG_HFC_FIFO) {
if (ch->rx_skb)
i = ch->rx_skb->len;
else
i = 0;
mISDN_debugprint(&ch->inst, "reading %i bytes channel(%i) "
"irq_cnt(%i) fstat(%i) idx(%i) f1(%i) f2(%i) z1(%i) z2(%i)",
rcnt, channel, hw->irq_cnt, fstat, i, f1, f2, z1, z2);
}
if (rcnt > 0) {
if (!ch->rx_skb) {
ch->rx_skb = alloc_stack_skb(ch->maxlen + 3, ch->up_headerlen);
if (!ch->rx_skb) {
printk(KERN_DEBUG "%s: No mem for rx_skb\n", __FUNCTION__);
return;
}
}
data = skb_put(ch->rx_skb, rcnt);
/* read data from FIFO */
i=0;
while (i<rcnt) {
if ((rcnt-i) >= 4) {
*((__u32 *) (data+i)) = read32_xhfc(hw, A_FIFO_DATA);
i += 4;
} else {
*(data+i) = read_xhfc(hw, A_FIFO_DATA);
i++;
}
}
} else
return;
if (test_bit(FLG_HDLC, &ch->Flags)) {
if (f1 != f2) {
xhfc_inc_f(hw);
/* check minimum frame size */
if (ch->rx_skb->len < 4) {
if (debug & DEBUG_HFC_FIFO_ERR)
mISDN_debugprint(&ch->inst,
"%s: frame in channel(%i) < minimum size",
__FUNCTION__,
channel);
goto read_exit;
}
/* check crc */
if (ch->rx_skb->data[ch->rx_skb->len - 1]) {
if (debug & DEBUG_HFC_FIFO_ERR)
mISDN_debugprint(&ch->inst,
"%s: channel(%i) CRC-error",
__FUNCTION__,
channel);
goto read_exit;
}
/* remove cksum */
skb_trim(ch->rx_skb, ch->rx_skb->len - 3);
if (ch->rx_skb->len < MISDN_COPY_SIZE) {
skb = alloc_stack_skb(ch->rx_skb->len, ch->up_headerlen);
if (skb) {
memcpy(skb_put(skb, ch->rx_skb->len),
ch->rx_skb->data, ch->rx_skb->len);
skb_trim(ch->rx_skb, 0);
} else {
skb = ch->rx_skb;
ch->rx_skb = NULL;
}
} else {
skb = ch->rx_skb;
ch->rx_skb = NULL;
}
queue_ch_frame(ch, INDICATION, MISDN_ID_ANY, skb);
if ((ch->debug) && (debug & DEBUG_HFC_DTRACE)) {
mISDN_debugprint(&ch->inst,
"channel(%i) new RX len(%i): ",
channel, skb->len);
i = 0;
printk(" ");
while (i < skb->len)
printk("%02x ", skb->data[i++]);
printk("\n");
}
read_exit:
if (ch->rx_skb)
skb_trim(ch->rx_skb, 0);
if (read_xhfc(hw, A_USAGE) > 8) {
if (debug & DEBUG_HFC_FIFO)
mISDN_debugprint(&ch->inst,
"%s: channel(%i) continue xhfc_read_fifo",
__FUNCTION__,
channel);
goto receive_buffer;
}
return;
} else {
xhfc_selfifo(hw, (channel * 2) + 1);
}
} else {
xhfc_selfifo(hw, (channel * 2) + 1);
if (ch->rx_skb->len >= TRANSP_PACKET_SIZE) {
/* deliver transparent data to layer2 */
queue_ch_frame(ch, INDICATION, MISDN_ID_ANY, ch->rx_skb);
ch->rx_skb = NULL;
}
}
}
/*************************************/
/* bottom half handler for interrupt */
/*************************************/
static void
xhfc_bh_handler(unsigned long ul_hw)
{
xhfc_hw *hw = (xhfc_hw *) ul_hw;
int i;
reg_a_su_rd_sta su_state;
channel_t *dch;
/* timer interrupt */
if (hw->misc_irq.bit.v_ti_irq) {
hw->misc_irq.bit.v_ti_irq = 0;
/* Handle tx Fifos */
for (i = 0; i < hw->max_fifo; i++) {
if ((1 << (i * 2)) & (hw->fifo_irqmsk)) {
hw->fifo_irq &= ~(1 << (i * 2));
if (test_bit(FLG_TX_BUSY, &hw->chan[i].ch.Flags))
xhfc_write_fifo(hw, i);
}
}
/* handle NT Timer */
for (i = 0; i < hw->num_ports; i++) {
if ((hw->port[i].mode & PORT_MODE_NT)
&& (hw->port[i].mode & NT_TIMER)) {
if ((--hw->port[i].nt_timer) < 0)
su_new_state(&hw->chan[(i << 2) + 2].ch);
}
}
}
/* set fifo_irq when RX data over treshold */
for (i = 0; i < hw->num_ports; i++) {
hw->fifo_irq |= read_xhfc(hw, R_FILL_BL0 + i) << (i * 8);
}
/* Handle rx Fifos */
if ((hw->fifo_irq & hw->fifo_irqmsk) & FIFO_MASK_RX) {
for (i = 0; i < hw->max_fifo; i++) {
if ((hw->fifo_irq & (1 << (i * 2 + 1)))
& (hw->fifo_irqmsk)) {
hw->fifo_irq &= ~(1 << (i * 2 + 1));
xhfc_read_fifo(hw, i);
}
}
}
/* su interrupt */
if (hw->su_irq.reg & hw->su_irqmsk.reg) {
hw->su_irq.reg = 0;
for (i = 0; i < hw->num_ports; i++) {
write_xhfc(hw, R_SU_SEL, i);
su_state.reg = read_xhfc(hw, A_SU_RD_STA);
dch = &hw->chan[(i << 2) + 2].ch;
if (su_state.bit.v_su_sta != dch->state) {
dch->state = su_state.bit.v_su_sta;
su_new_state(dch);
}
}
}
}
/*********************/
/* Interrupt handler */
/*********************/
static irqreturn_t
xhfc_interrupt(int intno, void *dev_id, struct pt_regs *regs)
{
xhfc_hw *hw = dev_id;
__u8 i;
__u32 f0_cnt;
if (!(hw->irq_ctrl.bit.v_glob_irq_en)
&& (read_xhfc(hw, R_IRQ_OVIEW))) {
if (debug & DEBUG_HFC_IRQ)
printk(KERN_INFO
"%s %s NOT M_GLOB_IRQ_EN or R_IRQ_OVIEW \n",
hw->card_name, __FUNCTION__);
return IRQ_NONE;
}
hw->misc_irq.reg |= read_xhfc(hw, R_MISC_IRQ);
hw->su_irq.reg |= read_xhfc(hw, R_SU_IRQ);
/* get fifo IRQ states in bundle */
for (i = 0; i < 4; i++) {
hw->fifo_irq |=
(read_xhfc(hw, R_FIFO_BL0_IRQ + i) << (i * 8));
}
/* call bottom half at events
* - Timer Interrupt (or other misc_irq sources)
* - SU State change
* - Fifo FrameEnd interrupts (only at rx fifos enabled)
*/
if (!((hw->misc_irq.reg & hw->misc_irqmsk.reg)
|| (hw->su_irq.reg & hw->su_irqmsk.reg)
|| (hw->fifo_irq & hw->fifo_irqmsk)))
return IRQ_NONE;
/* queue bottom half */
if (!(hw->testirq))
tasklet_schedule(&hw->tasklet);
/* count irqs */
hw->irq_cnt++;
#ifdef USE_F0_COUNTER
/* akkumulate f0 counter diffs */
f0_cnt = read_xhfc(hw, R_F0_CNTL);
f0_cnt += read_xhfc(hw, R_F0_CNTH) << 8;
hw->f0_akku += (f0_cnt - hw->f0_cnt);
if ((f0_cnt - hw->f0_cnt) < 0)
hw->f0_akku += 0xFFFF;
hw->f0_cnt = f0_cnt;
#endif
return IRQ_HANDLED;
}
/*****************************************************/
/* disable all interrupts by disabling M_GLOB_IRQ_EN */
/*****************************************************/
void
disable_interrupts(xhfc_hw * hw)
{
if (debug & DEBUG_HFC_IRQ)
printk(KERN_INFO "%s %s\n", hw->card_name, __FUNCTION__);
hw->irq_ctrl.bit.v_glob_irq_en = 0;
write_xhfc(hw, R_IRQ_CTRL, hw->irq_ctrl.reg);
}
/******************************************/
/* start interrupt and set interrupt mask */
/******************************************/
void
enable_interrupts(xhfc_hw * hw)
{
if (debug & DEBUG_HFC_IRQ)
printk(KERN_INFO "%s %s\n", hw->card_name, __FUNCTION__);
write_xhfc(hw, R_SU_IRQMSK, hw->su_irqmsk.reg);
/* use defined timer interval */
write_xhfc(hw, R_TI_WD, hw->ti_wd.reg);
hw->misc_irqmsk.bit.v_ti_irqmsk = 1;
write_xhfc(hw, R_MISC_IRQMSK, hw->misc_irqmsk.reg);
/* clear all pending interrupts bits */
read_xhfc(hw, R_MISC_IRQ);
read_xhfc(hw, R_SU_IRQ);
read_xhfc(hw, R_FIFO_BL0_IRQ);
read_xhfc(hw, R_FIFO_BL1_IRQ);
read_xhfc(hw, R_FIFO_BL2_IRQ);
read_xhfc(hw, R_FIFO_BL3_IRQ);
/* enable global interrupts */
hw->irq_ctrl.bit.v_glob_irq_en = 1;
hw->irq_ctrl.bit.v_fifo_irq_en = 1;
write_xhfc(hw, R_IRQ_CTRL, hw->irq_ctrl.reg);
}
/***********************************/
/* initialise the XHFC ISDN Chip */
/* return 0 on success. */
/***********************************/
int
init_xhfc(xhfc_hw * hw)
{
int err = 0;
int timeout = 0x2000;
hw->chip_id = read_xhfc(hw, R_CHIP_ID);
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO "%s %s ChipID: 0x%x\n", hw->card_name,
__FUNCTION__, hw->chip_id);
switch (hw->chip_id) {
case CHIP_ID_1SU:
hw->num_ports = 1;
hw->max_fifo = 4;
hw->max_z = 0xFF;
hw->ti_wd.bit.v_ev_ts = 0x6; /* timer irq interval 16 ms */
write_xhfc(hw, R_FIFO_MD, M1_FIFO_MD * 2);
hw->su_irqmsk.bit.v_su0_irqmsk = 1;
break;
case CHIP_ID_2SU:
hw->num_ports = 2;
hw->max_fifo = 8;
hw->max_z = 0x7F;
hw->ti_wd.bit.v_ev_ts = 0x5; /* timer irq interval 8 ms */
write_xhfc(hw, R_FIFO_MD, M1_FIFO_MD * 1);
hw->su_irqmsk.bit.v_su0_irqmsk = 1;
hw->su_irqmsk.bit.v_su1_irqmsk = 1;
break;
case CHIP_ID_2S4U:
case CHIP_ID_4SU:
hw->num_ports = 4;
hw->max_fifo = 16;
hw->max_z = 0x3F;
hw->ti_wd.bit.v_ev_ts = 0x4; /* timer irq interval 4 ms */
write_xhfc(hw, R_FIFO_MD, M1_FIFO_MD * 0);
hw->su_irqmsk.bit.v_su0_irqmsk = 1;
hw->su_irqmsk.bit.v_su1_irqmsk = 1;
hw->su_irqmsk.bit.v_su2_irqmsk = 1;
hw->su_irqmsk.bit.v_su3_irqmsk = 1;
break;
default:
err = -ENODEV;
}
if (err) {
if (debug & DEBUG_HFC_INIT)
printk(KERN_ERR "%s %s: unkown Chip ID 0x%x\n",
hw->card_name, __FUNCTION__, hw->chip_id);
return (err);
}
/* software reset to enable R_FIFO_MD setting */
write_xhfc(hw, R_CIRM, M_SRES);
udelay(5);
write_xhfc(hw, R_CIRM, 0);
/* amplitude */
write_xhfc(hw, R_PWM_MD, 0x80);
write_xhfc(hw, R_PWM1, 0x18);
write_xhfc(hw, R_FIFO_THRES, 0x11);
while ((read_xhfc(hw, R_STATUS) & (M_BUSY | M_PCM_INIT))
&& (timeout))
timeout--;
if (!(timeout)) {
if (debug & DEBUG_HFC_INIT)
printk(KERN_ERR
"%s %s: initialization sequence could not finish\n",
hw->card_name, __FUNCTION__);
return (-ENODEV);
}
/* set PCM master mode */
hw->pcm_md0.bit.v_pcm_md = 1;
write_xhfc(hw, R_PCM_MD0, hw->pcm_md0.reg);
/* set pll adjust */
hw->pcm_md0.bit.v_pcm_idx = IDX_PCM_MD1;
hw->pcm_md1.bit.v_pll_adj = 3;
write_xhfc(hw, R_PCM_MD0, hw->pcm_md0.reg);
write_xhfc(hw, R_PCM_MD1, hw->pcm_md1.reg);
enable_interrupts(hw);
mdelay(1 << hw->ti_wd.bit.v_ev_ts);
if (hw->irq_cnt > 2) {
disable_interrupts(hw);
hw->testirq = 0;
return (0);
} else {
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO
"%s %s: ERROR getting IRQ (irq_cnt %i)\n",
hw->card_name, __FUNCTION__, hw->irq_cnt);
disable_interrupts(hw);
free_irq(hw->irq, hw);
return (-EIO);
}
}
/*************************************/
/* free memory for all used channels */
/*************************************/
void
release_channels(xhfc_hw * hw)
{
int i = 0;
while (i < MAX_CHAN) {
if (hw->chan[i].ch.Flags) {
if (debug & DEBUG_HFC_INIT)
printk(KERN_DEBUG "%s %s: free channel %d\n",
hw->card_name, __FUNCTION__, i);
mISDN_freechannel(&hw->chan[i].ch);
hw_mISDNObj.ctrl(&hw->chan[i].ch.inst, MGR_UNREGLAYER | REQUEST, NULL);
}
i++;
}
}
/*********************************************/
/* setup port (line interface) with SU_CRTLx */
/*********************************************/
void
init_su(xhfc_hw * hw, __u8 pt)
{
xhfc_port_t *port = &hw->port[pt];
if (debug & DEBUG_HFC_MODE)
printk(KERN_INFO "%s %s port(%i)\n", hw->card_name,
__FUNCTION__, pt);
write_xhfc(hw, R_SU_SEL, pt);
if (port->mode & PORT_MODE_NT)
port->su_ctrl0.bit.v_su_md = 1;
if (port->mode & PORT_MODE_EXCH_POL)
port->su_ctrl2.reg = M_SU_EXCHG;
if (port->mode & PORT_MODE_UP) {
port->st_ctrl3.bit.v_st_sel = 1;
write_xhfc(hw, A_MS_TX, 0x0F);
port->su_ctrl0.bit.v_st_sq_en = 1;
}
if (debug & DEBUG_HFC_MODE)
printk(KERN_INFO "%s %s su_ctrl0(0x%02x) "
"su_ctrl1(0x%02x) "
"su_ctrl2(0x%02x) "
"st_ctrl3(0x%02x)\n",
hw->card_name, __FUNCTION__,
port->su_ctrl0.reg,
port->su_ctrl1.reg,
port->su_ctrl2.reg,
port->st_ctrl3.reg);
write_xhfc(hw, A_ST_CTRL3, port->st_ctrl3.reg);
write_xhfc(hw, A_SU_CTRL0, port->su_ctrl0.reg);
write_xhfc(hw, A_SU_CTRL1, port->su_ctrl1.reg);
write_xhfc(hw, A_SU_CTRL2, port->su_ctrl2.reg);
if (port->mode & PORT_MODE_TE)
write_xhfc(hw, A_SU_CLK_DLY, CLK_DLY_TE);
else
write_xhfc(hw, A_SU_CLK_DLY, CLK_DLY_NT);
write_xhfc(hw, A_SU_WR_STA, 0);
}
/*********************************************************/
/* Setup Fifo using A_CON_HDLC, A_SUBCH_CFG, A_FIFO_CTRL */
/*********************************************************/
void
setup_fifo(xhfc_hw * hw, __u8 fifo, __u8 conhdlc, __u8 subcfg,
__u8 fifoctrl, __u8 enable)
{
xhfc_selfifo(hw, fifo);
write_xhfc(hw, A_CON_HDLC, conhdlc);
write_xhfc(hw, A_SUBCH_CFG, subcfg);
write_xhfc(hw, A_FIFO_CTRL, fifoctrl);
if (enable)
hw->fifo_irqmsk |= (1 << fifo);
else
hw->fifo_irqmsk &= ~(1 << fifo);
xhfc_resetfifo(hw);
xhfc_selfifo(hw, fifo);
if (debug & DEBUG_HFC_MODE) {
printk(KERN_INFO
"%s %s: fifo(%i) conhdlc(0x%02x) subcfg(0x%02x) fifoctrl(0x%02x)\n",
hw->card_name, __FUNCTION__, fifo, sread_xhfc(hw,
A_CON_HDLC),
sread_xhfc(hw, A_SUBCH_CFG), sread_xhfc(hw,
A_FIFO_CTRL)
);
}
}
/**************************************************/
/* Setup S/U interface, enable/disable B-Channels */
/**************************************************/
void
setup_su(xhfc_hw * hw, __u8 pt, __u8 bc, __u8 enable)
{
xhfc_port_t *port = &hw->port[pt];
if (!((bc == 0) || (bc == 1))) {
printk(KERN_INFO "%s %s: pt(%i) ERROR: bc(%i) unvalid!\n",
hw->card_name, __FUNCTION__, pt, bc);
return;
}
if (debug & DEBUG_HFC_MODE)
printk(KERN_INFO "%s %s %s pt(%i) bc(%i)\n",
hw->card_name, __FUNCTION__,
(enable) ? ("enable") : ("disable"), pt, bc);
if (bc) {
port->su_ctrl2.bit.v_b2_rx_en = (enable?1:0);
port->su_ctrl0.bit.v_b2_tx_en = (enable?1:0);
} else {
port->su_ctrl2.bit.v_b1_rx_en = (enable?1:0);
port->su_ctrl0.bit.v_b1_tx_en = (enable?1:0);
}
if (hw->port[pt].mode & PORT_MODE_NT)
hw->port[pt].su_ctrl0.bit.v_su_md = 1;
write_xhfc(hw, R_SU_SEL, pt);
write_xhfc(hw, A_SU_CTRL0, hw->port[pt].su_ctrl0.reg);
write_xhfc(hw, A_SU_CTRL2, hw->port[pt].su_ctrl2.reg);
}
/*********************************************/
/* (dis-) connect D/B-Channel using protocol */
/*********************************************/
int
setup_channel(xhfc_hw * hw, __u8 channel, int protocol)
{
xhfc_port_t *port = hw->chan[channel].port;
if (test_bit(FLG_BCHANNEL, &hw->chan[channel].ch.Flags)) {
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].ch.inst,
"channel(%i) protocol %x-->%x",
channel,
hw->chan[channel].ch.state,
protocol);
switch (protocol) {
case (-1): /* used for init */
hw->chan[channel].ch.state = -1;
hw->chan[channel].ch.channel = channel;
/* fall trough */
case (ISDN_PID_NONE):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->
chan[channel].ch.inst,
"ISDN_PID_NONE");
if (hw->chan[channel].ch.state == ISDN_PID_NONE)
return (0); /* already in idle state */
hw->chan[channel].ch.state = ISDN_PID_NONE;
setup_fifo(hw, (channel << 1), 4, 0, 0, 0); /* B-TX fifo */
setup_fifo(hw, (channel << 1) + 1, 4, 0, 0, 0); /* B-RX fifo */
setup_su(hw, port->idx, (channel % 4) ? 1 : 0, 0);
test_and_clear_bit(FLG_HDLC, &hw->chan[channel].ch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &hw->chan[channel].ch.Flags);
break;
case (ISDN_PID_L1_B_64TRANS):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].ch.inst,
"ISDN_PID_L1_B_64TRANS");
setup_fifo(hw, (channel << 1), 6, 0, 0, 1); /* B-TX Fifo */
setup_fifo(hw, (channel << 1) + 1, 6, 0, 0, 1); /* B-RX Fifo */
setup_su(hw, port->idx, (channel % 4) ? 1 : 0, 1);
hw->chan[channel].ch.state = ISDN_PID_L1_B_64TRANS;
test_and_set_bit(FLG_TRANSPARENT, &hw->chan[channel].ch.Flags);
break;
case (ISDN_PID_L1_B_64HDLC):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].ch.inst,
"ISDN_PID_L1_B_64HDLC");
setup_fifo(hw, (channel << 1), 4, 0, M_FR_ABO, 1); // TX Fifo
setup_fifo(hw, (channel << 1) + 1, 4, 0, M_FR_ABO | M_FIFO_IRQMSK, 1); // RX Fifo
setup_su(hw, port->idx, (channel % 4) ? 1 : 0, 1);
hw->chan[channel].ch.state = ISDN_PID_L1_B_64HDLC;
test_and_set_bit(FLG_HDLC, &hw->chan[channel].ch.Flags);
break;
default:
mISDN_debugprint(&hw->chan[channel].ch.inst,
"prot not known %x",
protocol);
return (-ENOPROTOOPT);
}
return (0);
}
else if (test_bit(FLG_DCHANNEL, &hw->chan[channel].ch.Flags)) {
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].ch.inst,
"D channel(%i) protocol(%i)",
channel, protocol);
setup_fifo(hw, (channel << 1), 5, 2, M_FR_ABO, 1); /* D TX fifo */
setup_fifo(hw, (channel << 1) + 1, 5, 2, M_FR_ABO | M_FIFO_IRQMSK, 1); /* D RX fifo */
return (0);
}
printk(KERN_INFO
"%s %s ERROR: channel(%i) is NEITHER B nor D !!!\n",
hw->card_name, __FUNCTION__, channel);
return (-1);
}
/*****************************************************/
/* register ISDN stack for one XHFC card */
/* - register all ports and channels */
/* - set param_idx */
/* */
/* channel mapping in mISDN in hw->chan[MAX_CHAN]: */
/* 1st line interf: 0=B1, 1=B2, 2=D, 3=PCM */
/* 2nd line interf: 4=B1, 5=B2, 6=D, 7=PCM */
/* 3rd line interf: 8=B1, 9=B2, 10=D, 11=PCM */
/* 4th line interf; 12=B1, 13=B2, 14=D, 15=PCM */
/*****************************************************/
int
init_mISDN_channels(xhfc_hw * hw)
{
int err;
int pt; /* ST/U port index */
int ch_idx; /* channel index */
int b;
channel_t *ch;
mISDN_pid_t pid;
u_long flags;
for (pt = 0; pt < hw->num_ports; pt++) {
/* init D channels */
ch_idx = (pt << 2) + 2;
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO
"%s %s: Registering D-channel, card(%d) "
"ch(%d) port(%d) protocol(%x)\n",
hw->card_name, __FUNCTION__, hw->cardnum,
ch_idx, pt, hw->port[pt].dpid);
hw->port[pt].idx = pt;
hw->chan[ch_idx].port = &hw->port[pt];
ch = &hw->chan[ch_idx].ch;
memset(ch, 0, sizeof(channel_t));
ch->channel = ch_idx;
ch->debug = debug;
ch->inst.obj = &hw_mISDNObj;
ch->inst.hwlock = &hw->lock;
ch->inst.class_dev.dev = &hw->pdev->dev;
mISDN_init_instance(&ch->inst, &hw_mISDNObj, hw, xhfc_l2l1);
ch->inst.pid.layermask = ISDN_LAYER(0);
sprintf(ch->inst.name, "%s/%d", hw->card_name, pt);
err = mISDN_initchannel(ch, MSK_INIT_DCHANNEL, MAX_DFRAME_LEN_L1);
if (err)
goto free_channels;
ch->hw = hw;
/* init t3 timer */
init_timer(&hw->port[pt].t3_timer);
hw->port[pt].t3_timer.data = (long) ch;
hw->port[pt].t3_timer.function = (void *) l1_timer_expire_t3;
/* init t4 timer */
init_timer(&hw->port[pt].t4_timer);
hw->port[pt].t4_timer.data = (long) ch;
hw->port[pt].t4_timer.function = (void *) l1_timer_expire_t4;
/* init B channels */
for (b = 0; b < 2; b++) {
ch_idx = (pt << 2) + b;
if (debug & DEBUG_HFC_INIT)
printk(KERN_DEBUG
"%s %s: Registering B-channel, card(%d) "
"ch(%d) port(%d)\n", hw->card_name,
__FUNCTION__, hw->cardnum, ch_idx, pt);
hw->chan[ch_idx].port = &hw->port[pt];
ch = &hw->chan[ch_idx].ch;
memset(ch, 0, sizeof(channel_t));
ch->channel = ch_idx;
ch->debug = debug;
mISDN_init_instance(&ch->inst, &hw_mISDNObj, hw, xhfc_l2l1);
ch->inst.pid.layermask = ISDN_LAYER(0);
ch->inst.hwlock = &hw->lock;
ch->inst.class_dev.dev = &hw->pdev->dev;
sprintf(ch->inst.name, "%s/%d B%d",
hw->card_name, pt, b + 1);
if (mISDN_initchannel(ch, MSK_INIT_BCHANNEL, MAX_DATA_MEM)) {
err = -ENOMEM;
goto free_channels;
}
ch->hw = hw;
}
/* clear PCM */
memset(&hw->chan[(pt << 2) + 3], 0, sizeof(channel_t));
mISDN_set_dchannel_pid(&pid, hw->port[pt].dpid,
layermask[hw->param_idx + pt]);
/* register D Channel */
ch = &hw->chan[(pt << 2) + 2].ch;
/* set protocol for NT/TE */
if (hw->port[pt].mode & PORT_MODE_NT) {
/* NT-mode */
hw->port[hw->param_idx + pt].mode |= NT_TIMER;
hw->port[hw->param_idx + pt].nt_timer = 0;
ch->inst.pid.protocol[0] = ISDN_PID_L0_NT_S0;
ch->inst.pid.protocol[1] = ISDN_PID_L1_NT_S0;
pid.protocol[0] = ISDN_PID_L0_NT_S0;
pid.protocol[1] = ISDN_PID_L1_NT_S0;
ch->inst.pid.layermask |= ISDN_LAYER(1);
pid.layermask |= ISDN_LAYER(1);
if (layermask[hw->param_idx + pt] & ISDN_LAYER(2))
pid.protocol[2] = ISDN_PID_L2_LAPD_NET;
} else {
/* TE-mode */
hw->port[hw->param_idx + pt].mode |= PORT_MODE_TE;
ch->inst.pid.protocol[0] = ISDN_PID_L0_TE_S0;
ch->inst.pid.protocol[1] = ISDN_PID_L1_TE_S0;
pid.protocol[0] = ISDN_PID_L0_TE_S0;
pid.protocol[1] = ISDN_PID_L1_TE_S0;
}
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO
"%s %s: registering Stack for Port %i\n",
hw->card_name, __FUNCTION__, pt);
/* register stack */
err = hw_mISDNObj.ctrl(NULL, MGR_NEWSTACK | REQUEST, &ch->inst);
if (err) {
printk(KERN_ERR
"%s %s: MGR_NEWSTACK | REQUEST err(%d)\n",
hw->card_name, __FUNCTION__, err);
goto free_channels;
}
ch->state = 0;
/* attach two BChannels to this DChannel (ch) */
for (b = 0; b < 2; b++) {
err = hw_mISDNObj.ctrl(ch->inst.st,
MGR_NEWSTACK | REQUEST,
&hw->chan[(pt << 2) + b].ch.inst);
if (err) {
printk(KERN_ERR
"%s %s: MGR_ADDSTACK bchan error %d\n",
hw->card_name, __FUNCTION__, err);
goto free_stack;
}
}
err = hw_mISDNObj.ctrl(ch->inst.st, MGR_SETSTACK | REQUEST, &pid);
if (err) {
printk(KERN_ERR
"%s %s: MGR_SETSTACK REQUEST dch err(%d)\n",
hw->card_name, __FUNCTION__, err);
hw_mISDNObj.ctrl(ch->inst.st,
MGR_DELSTACK | REQUEST, NULL);
goto free_stack;
}
/* initial setup of each channel */
setup_channel(hw, ch->channel, -1);
for (b = 0; b < 2; b++)
setup_channel(hw, (pt << 2) + b, -1);
/* delay some time */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout((100 * HZ) / 1000); /* Timeout 100ms */
hw_mISDNObj.ctrl(ch->inst.st, MGR_CTRLREADY | INDICATION, NULL);
}
return (0);
free_stack:
hw_mISDNObj.ctrl(ch->inst.st, MGR_DELSTACK | REQUEST, NULL);
free_channels:
spin_lock_irqsave(&hw_mISDNObj.lock, flags);
release_channels(hw);
list_del(&hw->list);
spin_unlock_irqrestore(&hw_mISDNObj.lock, flags);
return (err);
}
/********************************/
/* parse module paramaters like */
/* NE/TE and S0/Up port mode */
/********************************/
void
parse_module_params(xhfc_hw * hw)
{
__u8 pt;
/* parse module parameters */
for (pt = 0; pt < hw->num_ports; pt++) {
/* D-Channel protocol: (2=DSS1) */
hw->port[pt].dpid = (protocol[hw->param_idx + pt] & 0x0F);
if (hw->port[pt].dpid == 0) {
printk(KERN_INFO
"%s %s: WARNING: wrong value for protocol[%i], "
"assuming 0x02 (DSS1)...\n",
hw->card_name, __FUNCTION__,
hw->param_idx + pt);
hw->port[pt].dpid = 0x02;
}
/* Line Interface TE or NT */
if (protocol[hw->param_idx + pt] & 0x10)
hw->port[pt].mode |= PORT_MODE_NT;
else
hw->port[pt].mode |= PORT_MODE_TE;
/* Line Interface in S0 or Up mode */
if (protocol[hw->param_idx + pt] & 0x20)
hw->port[pt].mode |= PORT_MODE_UP;
else
hw->port[pt].mode |= PORT_MODE_S0;
/* st line polarity */
if (protocol[hw->param_idx + pt] & 0x40)
hw->port[pt].mode |= PORT_MODE_EXCH_POL;
/* link B-channel loop */
if (protocol[hw->param_idx + pt] & 0x80)
hw->port[pt].mode |= PORT_MODE_LOOP;
if (debug & DEBUG_HFC_INIT)
printk ("%s %s: protocol[%i]=0x%02x, dpid=%d, mode:%s,%s %s %s\n",
hw->card_name, __FUNCTION__, hw->param_idx+pt,
protocol[hw->param_idx + pt],
hw->port[pt].dpid,
(hw->port[pt].mode & PORT_MODE_TE)?"TE":"NT",
(hw->port[pt].mode & PORT_MODE_S0)?"S0":"Up",
(hw->port[pt].mode & PORT_MODE_EXCH_POL)?"SU_EXCH":"",
(hw->port[pt].mode & PORT_MODE_LOOP)?"B-LOOP":""
);
}
}
/********************************/
/* initialise the XHFC hardware */
/* return 0 on success. */
/********************************/
static int __devinit
setup_instance(xhfc_hw * hw)
{
int err;
int pt;
xhfc_hw *previous_hw;
u_long flags;
#if BRIDGE == BRIDGE_PCI2PI
err = init_pci_bridge(hw);
if (err)
goto out;
#endif
if (debug & DEBUG_HFC_INIT)
printk(KERN_WARNING "%s %s: requesting IRQ %d\n",
hw->card_name, __FUNCTION__, hw->irq);
spin_lock_init(&hw->lock);
tasklet_init(&hw->tasklet, xhfc_bh_handler, (unsigned long) hw);
/* search previous instances to index protocol[] array */
list_for_each_entry(previous_hw, &hw_mISDNObj.ilist, list) {
hw->param_idx += previous_hw->num_ports;
}
spin_lock_irqsave(&hw_mISDNObj.lock, flags);
/* add this instance to hardware list */
list_add_tail(&hw->list, &hw_mISDNObj.ilist);
spin_unlock_irqrestore(&hw_mISDNObj.lock, flags);
/* init interrupt engine */
hw->testirq = 1;
if (request_irq(hw->irq, xhfc_interrupt, SA_SHIRQ, "XHFC", hw)) {
printk(KERN_WARNING "%s %s: couldn't get interrupt %d\n",
hw->card_name, __FUNCTION__, hw->irq);
hw->irq = 0;
err = -EIO;
goto out;
}
err = init_xhfc(hw);
if (err)
goto out;
parse_module_params(hw);
/* init line interfaces (ports) */
for (pt = 0; pt < hw->num_ports; pt++) {
init_su(hw, pt);
}
/* register all channels at ISDN procol stack */
err = init_mISDN_channels(hw);
if (err)
goto out;
/* delay some time */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout((100 * HZ) / 1000); /* Timeout 100ms */
enable_interrupts(hw);
/* force initial layer1 statechanges */
hw->su_irq.reg = hw->su_irqmsk.reg;
/* init B cbannel loops if desired */
for (pt = 0; pt < hw->num_ports; pt++) {
if (hw->port[pt].mode & PORT_MODE_LOOP) {
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO "%s %s init B-channel loop in port(%i)\n",
hw->card_name, __FUNCTION__, pt);
xhfc_ph_command(&hw->chan[(pt << 2) + 2].ch, HFC_L1_TESTLOOP_B1);
xhfc_ph_command(&hw->chan[(pt << 2) + 2].ch, HFC_L1_TESTLOOP_B2);
}
}
return (0);
out:
return (err);
}
/************************/
/* release single card */
/************************/
static void
release_card(xhfc_hw * hw)
{
u_long flags;
disable_interrupts(hw);
free_irq(hw->irq, hw);
/* wait for pending tasklet to finish */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout((100 * HZ) / 1000); /* Timeout 100ms */
spin_lock_irqsave(&hw_mISDNObj.lock, flags);
release_channels(hw);
list_del(&hw->list);
spin_unlock_irqrestore(&hw_mISDNObj.lock, flags);
kfree(hw);
}
#if BRIDGE == BRIDGE_PCI2PI
/*****************************************/
/* PCI hotplug interface: probe new card */
/*****************************************/
static int __devinit
xhfc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
xhfc_param *driver_data = (xhfc_param *) ent->driver_data;
xhfc_hw *hw;
int err = -ENOMEM;
if (!(hw = kmalloc(sizeof(xhfc_hw), GFP_ATOMIC))) {
printk(KERN_ERR "%s %s: No kmem for XHFC card\n",
hw->card_name, __FUNCTION__);
return (err);
}
memset(hw, 0, sizeof(xhfc_hw));
hw->pdev = pdev;
err = pci_enable_device(pdev);
if (err)
goto out;
hw->cardnum = card_cnt;
sprintf(hw->card_name, "%s_%d", DRIVER_NAME, hw->cardnum);
printk(KERN_INFO "%s %s: adapter '%s' found on PCI bus %02x dev %02x\n",
hw->card_name, __FUNCTION__, driver_data->device_name,
pdev->bus->number, pdev->devfn);
hw->driver_data = *driver_data;
hw->irq = pdev->irq;
hw->hw_membase = (u_char *) pci_resource_start(pdev, 1);
hw->membase = ioremap((ulong) hw->hw_membase, 4096);
pci_set_drvdata(pdev, hw);
err = setup_instance(hw);
if (!err) {
card_cnt++;
return (0);
} else {
goto out;
}
out:
kfree(hw);
return (err);
};
/**************************************/
/* PCI hotplug interface: remove card */
/**************************************/
static void __devexit
xhfc_pci_remove(struct pci_dev *pdev)
{
xhfc_hw *hw = pci_get_drvdata(pdev);
printk(KERN_INFO "%s %s: removing card\n", hw->card_name,
__FUNCTION__);
release_card(hw);
card_cnt--;
pci_disable_device(pdev);
return;
};
static struct pci_device_id xhfc_ids[] = {
{.vendor = PCI_VENDOR_ID_CCD,
.device = 0xA003,
.subvendor = 0x1397,
.subdevice = 0xA003,
.driver_data =
(unsigned long) &((xhfc_param) {CHIP_ID_4SU, "XHFC Evaluation Board"}),
},
{}
};
/***************/
/* Module init */
/***************/
static struct pci_driver xhfc_driver = {
name:DRIVER_NAME,
probe:xhfc_pci_probe,
remove:__devexit_p(xhfc_pci_remove),
id_table:xhfc_ids,
};
MODULE_DEVICE_TABLE(pci, xhfc_ids);
#endif // BRIDGE_PCI2PI
/***************/
/* Module init */
/***************/
static int __init
xhfc_init(void)
{
int err;
printk(KERN_INFO "XHFC: %s driver Rev. %s (debug=%i)\n",
__FUNCTION__, mISDN_getrev(xhfc_rev), debug);
#ifdef MODULE
hw_mISDNObj.owner = THIS_MODULE;
#endif
INIT_LIST_HEAD(&hw_mISDNObj.ilist);
spin_lock_init(&hw_mISDNObj.lock);
hw_mISDNObj.name = DRIVER_NAME;
hw_mISDNObj.own_ctrl = xhfc_manager;
hw_mISDNObj.DPROTO.protocol[0] = ISDN_PID_L0_TE_S0 | ISDN_PID_L0_NT_S0;
hw_mISDNObj.DPROTO.protocol[1] = ISDN_PID_L1_TE_S0 | ISDN_PID_L1_NT_S0;
hw_mISDNObj.BPROTO.protocol[1] = ISDN_PID_L1_B_64TRANS | ISDN_PID_L1_B_64HDLC;
hw_mISDNObj.BPROTO.protocol[2] = ISDN_PID_L2_B_TRANS | ISDN_PID_L2_B_RAWDEV;
card_cnt = 0;
if ((err = mISDN_register(&hw_mISDNObj))) {
printk(KERN_ERR "XHFC: can't register xhfc error(%d)\n",
err);
goto out;
}
#if BRIDGE == BRIDGE_PCI2PI
err = pci_register_driver(&xhfc_driver);
if (err < 0) {
goto out;
}
#endif
printk(KERN_INFO "XHFC: %d cards installed\n", card_cnt);
#if !defined(CONFIG_HOTPLUG)
if (err == 0) {
err = -ENODEV;
pci_unregister_driver(&xhfc_driver);
goto out;
}
#endif
return 0;
out:
return (err);
}
static void __exit
xhfc_cleanup(void)
{
int err;
#if BRIDGE == BRIDGE_PCI2PI
pci_unregister_driver(&xhfc_driver);
#endif
if ((err = mISDN_unregister(&hw_mISDNObj))) {
printk(KERN_ERR "XHFC: can't unregister xhfc, error(%d)\n",
err);
}
printk(KERN_INFO "%s: driver removed\n", __FUNCTION__);
}
module_init(xhfc_init);
module_exit(xhfc_cleanup);
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