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mISDN/drivers/isdn/hardware/mISDN/hfcs_mini.c

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/* $Id$
*
* mISDN driver for Colognechip HFC-S mini Evaluation Card
*
* 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 PCI mode (0=master, 1=slave)
* <bit 6> 0x0040 not in use
* <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 hfcs_mini.h for debug options)
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <asm/timex.h>
#include "layer1.h"
#include "debug.h"
#include "hfcs_mini.h"
#include "hfcsmcc.h"
#if HFCBRIDGE == BRIDGE_HFCPCI
#include <linux/pci.h>
#endif
static const char hfcsmini_rev[] = "$Revision$";
#define MAX_CARDS 8
static int card_cnt;
static u_int protocol[MAX_CARDS];
static int layermask[MAX_CARDS];
#ifdef MODULE
MODULE_LICENSE("GPL");
#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;
#if HFCBRIDGE == BRIDGE_HFCPCI
static inline void
hfcsmini_sel_reg(hfcsmini_hw * hw, __u8 reg_addr)
{
outb(6, hw->iobase + 3); /* A0 = 1, reset = 1 */
outb(reg_addr, hw->iobase + 1); /* write register number */
outb(4, hw->iobase + 3); /* A0 = 0, reset = 1 */
}
static inline __u8
read_hfcsmini(hfcsmini_hw * hw, __u8 reg_addr)
{
register u_char ret;
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_lock_irq(&hw->rlock);
#endif
hfcsmini_sel_reg(hw, reg_addr);
ret = inb(hw->iobase + 1);
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_unlock_irq(&hw->rlock);
#endif
return(ret);
}
/* read register in already spin-locked irq context */
static inline __u8
read_hfcsmini_irq(hfcsmini_hw * hw, __u8 reg_addr)
{
register u_char ret;
hfcsmini_sel_reg(hw, reg_addr);
ret = inb(hw->iobase + 1);
return(ret);
}
static inline __u8
read_hfcsmini_stable(hfcsmini_hw * hw, __u8 reg_addr)
{
register u_char in1, in2;
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_lock_irq(&hw->rlock);
#endif
hfcsmini_sel_reg(hw, reg_addr);
in1 = inb(hw->iobase + 1);
// loop until 2 equal accesses
while((in2=inb(hw->iobase + 1))!=in1) in1=in2;
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_unlock_irq(&hw->rlock);
#endif
return(in1);
}
static inline void
write_hfcsmini(hfcsmini_hw * hw, __u8 reg_addr, __u8 value)
{
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_lock_irq(&hw->rlock);
#endif
hfcsmini_sel_reg(hw, reg_addr);
outb(value, hw->iobase + 1);
#ifdef SPIN_LOCK_HFCSMINI_REGISTER
spin_unlock_irq(&hw->rlock);
#endif
}
#endif
static void
hfcsmini_ph_command(channel_t * dch, u_char command)
{
hfcsmini_hw *hw = dch->hw;
if (dch->debug)
mISDN_debugprint(&dch->inst,
"%s command(%i) channel(%i)",
__FUNCTION__, command, dch->channel);
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) command(%i)",
dch->channel, command);
}
write_hfcsmini(hw, R_ST_WR_STA, (M_ST_LD_STA | (M1_ST_SET_STA*4)));
udelay(125); /* to be sure INFO1 signals are sent */
write_hfcsmini(hw, R_ST_WR_STA, (M1_ST_SET_STA * 4));
break;
case HFC_L1_FORCE_DEACTIVATE_TE:
write_hfcsmini(hw, R_ST_WR_STA, (M_ST_LD_STA | (M1_ST_SET_STA*3)));
udelay(7); /* wait at least 5,21 us */
write_hfcsmini(hw, R_ST_WR_STA, (M1_ST_SET_STA*3));
break;
case HFC_L1_ACTIVATE_NT:
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"HFC_L1_ACTIVATE_NT channel(%i)");
write_hfcsmini(hw, R_ST_WR_STA, (M1_ST_ACT | M_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)");
write_hfcsmini(hw, R_ST_WR_STA, (M1_ST_ACT * 2));
break;
case HFC_L1_TESTLOOP_B1:
break;
case HFC_L1_TESTLOOP_B2:
break;
}
}
/*********************************/
/* S0 state change event handler */
/*********************************/
static void
s0_new_state(channel_t * dch)
{
u_int prim = PH_SIGNAL | INDICATION;
u_int para = 0;
hfcsmini_hw *hw = dch->hw;
if (hw->portmode & PORT_MODE_TE) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s: TE %d",
__FUNCTION__, dch->state);
switch (dch->state) {
case (0):
prim = PH_CONTROL | INDICATION;
para = HW_RESET;
break;
case (3):
prim = PH_CONTROL | INDICATION;
para = HW_DEACTIVATE;
break;
case (6):
para = INFO2;
break;
case (7):
para = INFO4_P8;
break;
case (5):
case (8):
para = ANYSIGNAL;
break;
default:
return;
}
if (dch->state== 7)
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
else
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
} // PORT_MODE_TE
if (hw->portmode & PORT_MODE_NT) {
if ((dch->debug) & (debug & DEBUG_HFC_S0_STATES))
mISDN_debugprint(&dch->inst,
"%s: NT %d",
__FUNCTION__, dch->state);
switch (dch->state) {
case (1):
hw->nt_timer = 0;
hw->portmode &= ~NT_TIMER;
prim = PH_DEACTIVATE | INDICATION;
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
para = 0;
break;
case (2):
if (hw->nt_timer < 0) {
hw->nt_timer = 0;
hw->portmode &= ~NT_TIMER;
hfcsmini_ph_command(dch,
HFC_L1_DEACTIVATE_NT);
} else {
hw->nt_timer = NT_T1_COUNT;
hw->portmode |= NT_TIMER;
write_hfcsmini(hw, R_ST_WR_STA, M_SET_G2_G3);
}
return;
case (3):
hw->nt_timer = 0;
hw->portmode &= ~NT_TIMER;
prim = PH_ACTIVATE | INDICATION;
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
para = 0;
break;
case (4):
hw->nt_timer = 0;
hw->portmode &= ~NT_TIMER;
return;
default:
break;
}
} // PORT_MODE_NT
mISDN_queue_data(&dch->inst, FLG_MSG_UP, prim, para, 0, NULL, 0);
}
/*************************************/
/* Layer 1 D-channel hardware access */
/*************************************/
static int
handle_dmsg(channel_t *dch, struct sk_buff *skb)
{
int ret = 0;
mISDN_head_t *hh = mISDN_HEAD_P(skb);
hfcsmini_hw *hw = dch->hw;
u_long flags;
if (hh->prim == (PH_SIGNAL | REQUEST)) {
ret = -EINVAL;
} else if (hh->prim == (PH_CONTROL | REQUEST)) {
spin_lock_irqsave(&hw->rlock, flags);
if (hh->dinfo == HW_RESET) {
if (dch->state != 0)
hfcsmini_ph_command(dch, HFC_L1_ACTIVATE_TE);
spin_unlock_irqrestore(&hw->rlock, flags);
skb_trim(skb, 0);
return(mISDN_queueup_newhead(&dch->inst, 0, PH_CONTROL | INDICATION,HW_POWERUP, skb));
} else if (hh->dinfo == HW_DEACTIVATE) {
if (dch->next_skb) {
dev_kfree_skb(dch->next_skb);
dch->next_skb = NULL;
}
test_and_clear_bit(FLG_TX_NEXT, &dch->Flags);
test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
#ifdef FIXME
if (test_and_clear_bit(FLG_L1_DBUSY, &dch->Flags))
dchannel_sched_event(dch, D_CLEARBUSY);
#endif
} else if ((hh->dinfo & HW_TESTLOOP) == HW_TESTLOOP) {
if (1 & hh->dinfo)
hfcsmini_ph_command(dch, HFC_L1_TESTLOOP_B1);
if (2 & hh->dinfo)
hfcsmini_ph_command(dch, HFC_L1_TESTLOOP_B2);
} else if (hh->dinfo == HW_POWERUP) {
hfcsmini_ph_command(dch, HFC_L1_FORCE_DEACTIVATE_TE);
} else {
if (dch->debug & L1_DEB_WARN)
mISDN_debugprint(&dch->inst,
"hfcsmini_l1hw unknown ctrl %x",
hh->dinfo);
ret = -EINVAL;
}
spin_unlock_irqrestore(&hw->rlock, flags);
} else if (hh->prim == (PH_ACTIVATE | REQUEST)) {
spin_lock_irqsave(&hw->rlock, flags);
if (hw->portmode & PORT_MODE_NT) {
hfcsmini_ph_command(dch, HFC_L1_ACTIVATE_NT);
} else {
if (dch->debug & L1_DEB_WARN)
mISDN_debugprint(&dch->inst,
"%s: PH_ACTIVATE none NT mode",
__FUNCTION__);
ret = -EINVAL;
}
spin_unlock_irqrestore(&hw->rlock, flags);
} else if (hh->prim == (PH_DEACTIVATE | REQUEST)) {
spin_lock_irqsave(&hw->rlock, flags);
if (hw->portmode & PORT_MODE_NT) {
hfcsmini_ph_command(dch, HFC_L1_DEACTIVATE_NT);
if (test_and_clear_bit(FLG_TX_NEXT, &dch->Flags)) {
dev_kfree_skb(dch->next_skb);
dch->next_skb = NULL;
}
if (dch->tx_skb) {
dev_kfree_skb(dch->tx_skb);
dch->tx_skb = NULL;
}
dch->tx_idx = 0;
if (dch->rx_skb) {
dev_kfree_skb(dch->rx_skb);
dch->rx_skb = NULL;
}
test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
} else {
if (dch->debug & L1_DEB_WARN)
mISDN_debugprint(&dch->inst,
"%s: PH_DEACTIVATE none NT mode",
__FUNCTION__);
ret = -EINVAL;
}
spin_unlock_irqrestore(&hw->rlock, flags);
} else if ((hh->prim & MISDN_CMD_MASK) == MGR_SHORTSTATUS) {
u_int temp = hh->dinfo & SSTATUS_ALL; // remove SSTATUS_BROADCAST_BIT
if ((hw->portmode & PORT_MODE_NT) &&
(temp == SSTATUS_ALL || temp == SSTATUS_L1)) {
if (hh->dinfo & SSTATUS_BROADCAST_BIT)
temp = dch->inst.id | MSG_BROADCAST;
else
temp = hh->addr | FLG_MSG_TARGET;
skb_trim(skb, 0);
hh->dinfo = test_bit(FLG_ACTIVE, &dch->Flags) ?
SSTATUS_L1_ACTIVATED : SSTATUS_L1_DEACTIVATED;
hh->prim = MGR_SHORTSTATUS | CONFIRM;
return(mISDN_queue_message(&dch->inst, temp, skb));
}
ret = -EOPNOTSUPP;
} else {
printk(KERN_WARNING "%s %s: unknown prim(%x)\n",
hw->card_name, __FUNCTION__, hh->prim);
ret = -EAGAIN;
}
if (!ret)
dev_kfree_skb(skb);
return (ret);
}
/*************************************/
/* Layer 1 B-channel hardware access */
/*************************************/
static int
handle_bmsg(channel_t *bch, struct sk_buff *skb)
{
hfcsmini_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->rlock, flags);
ret = setup_channel(hw, bch->channel,
bch->inst.pid.protocol[1]);
if (bch->inst.pid.protocol[2] == ISDN_PID_L2_B_TRANS)
test_and_set_bit(FLG_L2DATA, &bch->Flags);
spin_unlock_irqrestore(&hw->rlock, 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->rlock, 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->rlock, 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 if (hh->prim == (PH_CONTROL | REQUEST)) {
// do not handle PH_CONTROL | REQUEST ??
} else {
printk(KERN_WARNING "%s %s: unknown prim(%x)\n",
hw->card_name, __FUNCTION__, hh->prim);
ret = -EAGAIN;
}
if (!ret)
dev_kfree_skb(skb);
return (ret);
}
/******************************/
/* Layer2 -> Layer 1 Transfer */
/******************************/
static int
hfcsmini_l2l1(mISDNinstance_t *inst, struct sk_buff *skb)
{
channel_t *chan = container_of(inst, channel_t, inst);
hfcsmini_hw *hw = chan->hw;
int ret = 0;
mISDN_head_t *hh = mISDN_HEAD_P(skb);
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);
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
hfcsmini_manager(void *data, u_int prim, void *arg)
{
hfcsmini_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].Flags &&
&hw->chan[i].inst == inst) {
channel = i;
chan = &hw->chan[i];
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 (hfcsmini_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 (hfcsmini_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(hfcsmini_hw * hw, __u8 channel)
{
channel_t *ch = &hw->chan[channel];
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
hfcsmini_waitbusy(hfcsmini_hw *hw)
{
while (read_hfcsmini(hw, R_STATUS) & M_BUSY);
}
static inline void
hfcsmini_selfifo(hfcsmini_hw *hw, __u8 fifo)
{
write_hfcsmini(hw, R_FIFO, fifo);
hfcsmini_waitbusy(hw);
}
static inline void
hfcsmini_inc_f(hfcsmini_hw *hw)
{
write_hfcsmini(hw, A_INC_RES_FIFO, M_INC_F);
hfcsmini_waitbusy(hw);
}
static inline void
hfcsmini_resetfifo(hfcsmini_hw *hw)
{
write_hfcsmini(hw, A_INC_RES_FIFO, M_RES_FIFO);
hfcsmini_waitbusy(hw);
}
/**************************/
/* fill fifo with TX data */
/**************************/
void
hfcsmini_write_fifo(hfcsmini_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];
send_buffer:
if (!ch->tx_skb)
return;
remain = ch->tx_skb->len - ch->tx_idx;
if (remain <= 0)
return;
hfcsmini_selfifo(hw, (channel * 2));
free = (hw->max_z - (read_hfcsmini_stable(hw, A_USAGE)));
tcnt = (free >= remain) ? remain : free;
fstat = read_hfcsmini(hw, R_ST_RD_STA);
f1 = read_hfcsmini_stable(hw, A_F1);
f2 = read_hfcsmini(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);
}
if (free && fcnt && tcnt) {
data = ch->tx_skb->data + ch->tx_idx;
ch->tx_idx += tcnt;
if (debug & DEBUG_HFC_FIFO) {
printk(KERN_DEBUG "%s channel(%i) writing: ",
hw->card_name, channel);
}
i = tcnt;
/* write data to Fifo */
while (i--) {
if (debug & DEBUG_HFC_FIFO)
printk("%02x ", *data);
write_hfcsmini(hw, A_FIFO_DATA, *data++);
}
if (debug & DEBUG_HFC_FIFO)
printk("\n");
if (ch->tx_idx == ch->tx_skb->len) {
if (test_bit(FLG_HDLC, &ch->Flags)) {
/* terminate frame */
hfcsmini_inc_f(hw);
} else {
hfcsmini_selfifo(hw, (channel * 2));
}
if (debug & DEBUG_HFC_BTRACE)
mISDN_debugprint(&ch->inst,
"TX frame channel(%i) completed",
channel);
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 */
hfcsmini_selfifo(hw, (channel * 2));
}
}
}
/****************************/
/* read RX data out of fifo */
/****************************/
void
hfcsmini_read_fifo(hfcsmini_hw *hw, __u8 channel)
{
__u8 f1 = 0, f2 = 0, z1, z2;
__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];
receive_buffer:
hfcsmini_selfifo(hw, (channel * 2) + 1);
if (test_bit(FLG_HDLC, &ch->Flags)) {
/* hdlc rcnt */
f1 = read_hfcsmini_stable(hw, A_F1);
f2 = read_hfcsmini(hw, A_F2);
z1 = read_hfcsmini_stable(hw, A_Z1);
z2 = read_hfcsmini(hw, A_Z2);
fstat = read_hfcsmini(hw, R_ST_RD_STA);
rcnt = (z1 - z2) & hw->max_z;
if (f1 != f2)
rcnt++;
} else {
/* transparent rcnt */
rcnt = read_hfcsmini_stable(hw, A_USAGE) - 1;
f1=f2=z1=z2=0;
}
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*/
while (rcnt--)
*data++ = read_hfcsmini(hw, A_FIFO_DATA);
} else
return;
if (test_bit(FLG_HDLC, &ch->Flags)) {
if (f1 != f2) {
hfcsmini_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;
}
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");
}
queue_ch_frame(ch, INDICATION, MISDN_ID_ANY, skb);
read_exit:
if (ch->rx_skb)
skb_trim(ch->rx_skb, 0);
if (read_hfcsmini_stable(hw, A_USAGE) > 8) {
if (debug & DEBUG_HFC_FIFO)
mISDN_debugprint(&ch->inst,
"%s: channel(%i) continue hfcsmini_read_fifo",
__FUNCTION__, channel);
goto receive_buffer;
}
return;
} else {
hfcsmini_selfifo(hw, (channel * 2) + 1);
}
} else { /* transparent data */
hfcsmini_selfifo(hw, (channel * 2) + 1);
if (ch->rx_skb->len >= 128) {
/* 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
hfcsmini_bh_handler(unsigned long ul_hw)
{
hfcsmini_hw *hw = (hfcsmini_hw *) ul_hw;
reg_r_st_rd_sta state;
int i;
/* Timer Int */
if (hw->misc_irq.bit.v_ti_irq) {
hw->misc_irq.bit.v_ti_irq = 0;
/* add Fifo-Fill info into int_s1 bitfield */
hw->fifo_irq.reg |= ((read_hfcsmini(hw, R_FILL) ^ FIFO_MASK_TX) & hw->fifomask);
/* Handle TX Fifos */
for (i = 0; i < hw->max_fifo; i++) {
if ((1 << (i * 2)) & (hw->fifo_irq.reg)) {
hw->fifo_irq.reg &= ~(1 << (i * 2));
if (test_bit(FLG_TX_BUSY, &hw->chan[i].Flags))
hfcsmini_write_fifo(hw, i);
}
}
/* handle NT Timer */
if ((hw->portmode & PORT_MODE_NT) && (hw->portmode & NT_TIMER))
if ((--hw->nt_timer) < 0)
s0_new_state(&hw->chan[2]);
}
/* Handle RX Fifos */
for (i = 0; i < hw->max_fifo; i++) {
if ((1 << (i * 2 + 1)) & (hw->fifo_irq.reg)) {
hw->fifo_irq.reg &= ~(1 << (i * 2 + 1));
hfcsmini_read_fifo(hw, i);
}
}
/* state machine IRQ */
if (hw->misc_irq.bit.v_st_irq) {
hw->misc_irq.bit.v_st_irq = 0;
state.reg = read_hfcsmini(hw, R_ST_RD_STA);
/*
mISDN_debugprint(&dch->inst,
"new_l1_state(0x%02x)", state.bit.v_st_sta);
*/
if (state.bit.v_st_sta != hw->chan[2].state) {
hw->chan[2].state = state.bit.v_st_sta;
s0_new_state(&hw->chan[2]);
}
}
return;
}
/*********************/
/* Interrupt handler */
/*********************/
static irqreturn_t
hfcsmini_interrupt(int intno, void *dev_id, struct pt_regs *regs)
{
__u8 fifo_irq, misc_irq;
hfcsmini_hw *hw = dev_id;
spin_lock(&hw->rlock);
if (!(hw->misc_irqmsk.bit.v_irq_en)) {
if (!(hw->testirq))
printk(KERN_INFO
"%s %s GLOBAL INTERRUPT DISABLED\n",
hw->card_name, __FUNCTION__);
spin_unlock(&hw->rlock);
return IRQ_NONE;
}
fifo_irq = read_hfcsmini_irq(hw, R_FIFO_IRQ) & hw->fifo_irqmsk.reg;
misc_irq = read_hfcsmini_irq(hw, R_MISC_IRQ) & hw->misc_irqmsk.reg;
if (!fifo_irq && !misc_irq) {
spin_unlock(&hw->rlock);
return IRQ_NONE; /* other hardware interrupted */
}
hw->irq_cnt++;
hw->fifo_irq.reg |= fifo_irq;
hw->misc_irq.reg |= misc_irq;
/* queue bottom half */
if (!(hw->testirq)) {
tasklet_schedule(&hw->tasklet);
}
spin_unlock(&hw->rlock);
return IRQ_HANDLED;
}
/*************************************/
/* free memory for all used channels */
/*************************************/
void
release_channels(hfcsmini_hw * hw)
{
int i = 0;
while (i < MAX_CHAN) {
if (hw->chan[i].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]);
hw_mISDNObj.ctrl(&hw->chan[i].inst, MGR_UNREGLAYER | REQUEST, NULL);
}
i++;
}
}
/******************************************/
/* Setup Fifo using HDLC_PAR and CON_HDLC */
/******************************************/
void setup_fifo(hfcsmini_hw * hw, int fifo, __u8 hdlcreg, __u8 con_reg, __u8 irq_enable, __u8 enable)
{
if (enable)
/* mark fifo to be 'in use' */
hw->fifomask |= (1 << fifo);
else
hw->fifomask &= ~(1 << fifo);
if (irq_enable)
hw->fifo_irqmsk.reg |= (1 << fifo);
else
hw->fifo_irqmsk.reg &= ~(1 << fifo);
write_hfcsmini(hw, R_FIFO_IRQMSK, hw->fifo_irqmsk.reg);
hfcsmini_selfifo(hw, fifo);
write_hfcsmini(hw, A_HDLC_PAR, hdlcreg);
write_hfcsmini(hw, A_CON_HDLC, con_reg);
hfcsmini_resetfifo(hw);
}
/*************************************************/
/* Setup ST interface, enable/disable B-Channels */
/*************************************************/
void
setup_st(hfcsmini_hw * hw, __u8 bc, __u8 enable)
{
if (!((bc == 0) || (bc == 1))) {
printk(KERN_INFO "%s %s: ERROR: bc(%i) unvalid!\n",
hw->card_name, __FUNCTION__, bc);
return;
}
if (bc) {
hw->st_ctrl0.bit.v_b2_en = (enable?1:0);
hw->st_ctrl2.bit.v_b2_rx_en = (enable?1:0);
} else {
hw->st_ctrl0.bit.v_b1_en = (enable?1:0);
hw->st_ctrl2.bit.v_b1_rx_en = (enable?1:0);
}
write_hfcsmini(hw, R_ST_CTRL0, hw->st_ctrl0.reg);
write_hfcsmini(hw, R_ST_CTRL2, hw->st_ctrl2.reg);
if (debug & DEBUG_HFC_MODE) {
printk(KERN_INFO
"%s %s: bc(%i) %s, R_ST_CTRL0(0x%02x) R_ST_CTRL2(0x%02x)\n",
hw->card_name, __FUNCTION__, bc, enable?"enable":"disable",
hw->st_ctrl0.reg, hw->st_ctrl2.reg);
}
}
/*********************************************/
/* (dis-) connect D/B-Channel using protocol */
/*********************************************/
int
setup_channel(hfcsmini_hw *hw, __u8 channel, int protocol)
{
if (test_bit(FLG_BCHANNEL, &hw->chan[channel].Flags)) {
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].inst,
"channel(%i) protocol %x-->%x",
channel, hw->chan[channel].state, protocol);
switch (protocol) {
case (-1): /* used for init */
hw->chan[channel].state = -1;
hw->chan[channel].channel = channel;
/* fall trough */
case (ISDN_PID_NONE):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].inst,
"ISDN_PID_NONE");
if (hw->chan[channel].state == ISDN_PID_NONE)
return (0); /* already in idle state */
hw->chan[channel].state = ISDN_PID_NONE;
/* B-TX */
setup_fifo(hw, (channel << 1), 0, 0,
FIFO_IRQ_OFF, FIFO_DISABLE);
/* B-RX */
setup_fifo(hw, (channel << 1) + 1, 0, 0,
FIFO_IRQ_OFF, FIFO_DISABLE);
setup_st(hw, channel, 0);
test_and_clear_bit(FLG_HDLC, &hw->chan[channel].Flags);
test_and_clear_bit(FLG_TRANSPARENT, &hw->chan[channel].Flags);
break;
case (ISDN_PID_L1_B_64TRANS):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].inst,
"ISDN_PID_L1_B_64TRANS");
/* B-TX */
setup_fifo(hw, (channel << 1), HDLC_PAR_BCH,
CON_HDLC_B_TRANS, FIFO_IRQ_OFF,
FIFO_ENABLE);
/* B-RX */
setup_fifo(hw, (channel << 1) + 1, HDLC_PAR_BCH,
CON_HDLC_B_TRANS, FIFO_IRQ_OFF,
FIFO_ENABLE);
setup_st(hw, channel, 1);
hw->chan[channel].state = ISDN_PID_L1_B_64TRANS;
test_and_set_bit(FLG_TRANSPARENT, &hw->chan[channel].Flags);
break;
case (ISDN_PID_L1_B_64HDLC):
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].inst,
"ISDN_PID_L1_B_64HDLC");
/* B-TX */
setup_fifo(hw, (channel << 1), HDLC_PAR_BCH,
CON_HDLC_B_HDLC, FIFO_IRQ_OFF,
FIFO_ENABLE);
/* B-RX */
setup_fifo(hw, (channel << 1) + 1, HDLC_PAR_BCH,
CON_HDLC_B_HDLC, FIFO_IRQ_ON,
FIFO_ENABLE);
setup_st(hw, channel, 1);
hw->chan[channel].state = ISDN_PID_L1_B_64HDLC;
test_and_set_bit(FLG_HDLC, &hw->chan[channel].Flags);
break;
default:
mISDN_debugprint(&hw->chan[channel].inst,
"prot not known %x", protocol);
return (-ENOPROTOOPT);
}
return (0);
}
if (test_bit(FLG_DCHANNEL, &hw->chan[channel].Flags)) {
if (debug & DEBUG_HFC_MODE)
mISDN_debugprint(&hw->chan[channel].inst,
"D channel(%i) protocol(%i)",channel, protocol);
/* init the D-channel fifos */
/* D-TX */
setup_fifo(hw, (channel << 1), HDLC_PAR_DCH,
CON_HDLC_D_HDLC, FIFO_IRQ_OFF, FIFO_ENABLE);
/* D-RX */
setup_fifo(hw, (channel << 1) + 1, HDLC_PAR_DCH,
CON_HDLC_D_HDLC, FIFO_IRQ_ON, FIFO_DISABLE);
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 HFC-S mini instance */
/* - register all ports and channels */
/* - set param_idx */
/* */
/* channel mapping in mISDN in hw->chan[] */
/* 0=B1, 1=B2, 2=D, 3=PCM */
/*****************************************************/
int
init_mISDN_channels(hfcsmini_hw * hw)
{
int err;
int ch;
int b;
mISDN_pid_t pid;
u_long flags;
/* clear PCM */
memset(&hw->chan[3], 0, sizeof(channel_t));
/* init D channels */
ch = 2;
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO
"%s %s: Registering D-channel, card(%d) protocol(%x)\n",
hw->card_name, __FUNCTION__, hw->cardnum,
hw->dpid);
memset(&hw->chan[ch], 0, sizeof(channel_t));
hw->chan[ch].channel = ch;
hw->chan[ch].debug = debug;
hw->chan[ch].inst.obj = &hw_mISDNObj;
hw->chan[ch].inst.hwlock = &hw->mlock;
hw->chan[ch].inst.class_dev.dev = &hw->pdev->dev;
mISDN_init_instance(&hw->chan[ch].inst, &hw_mISDNObj, hw, hfcsmini_l2l1);
hw->chan[ch].inst.pid.layermask = ISDN_LAYER(0);
sprintf(hw->chan[ch].inst.name, "%s", hw->card_name);
err = mISDN_initchannel(&hw->chan[ch], MSK_INIT_DCHANNEL, MAX_DFRAME_LEN_L1);
if (err)
goto free_channels;
hw->chan[ch].hw = hw;
/* init B channels */
for (b = 0; b < 2; b++) {
if (debug & DEBUG_HFC_INIT)
printk(KERN_DEBUG
"%s %s: Registering B-channel, card(%d) "
"ch(%d)\n", hw->card_name,
__FUNCTION__, hw->cardnum, b);
memset(&hw->chan[b], 0, sizeof(channel_t));
hw->chan[b].channel = b;
hw->chan[b].debug = debug;
mISDN_init_instance(&hw->chan[b].inst, &hw_mISDNObj, hw, hfcsmini_l2l1);
hw->chan[b].inst.pid.layermask = ISDN_LAYER(0);
hw->chan[b].inst.hwlock = &hw->mlock;
hw->chan[b].inst.class_dev.dev = &hw->pdev->dev;
sprintf(hw->chan[b].inst.name, "%s B%d",
hw->chan[ch].inst.name, b + 1);
if (mISDN_initchannel(&hw->chan[b], MSK_INIT_BCHANNEL, MAX_DATA_MEM)) {
err = -ENOMEM;
goto free_channels;
}
hw->chan[b].hw = hw;
}
mISDN_set_dchannel_pid(&pid, hw->dpid, layermask[hw->param_idx]);
/* set protocol for NT/TE */
if (hw->portmode & PORT_MODE_NT) {
/* NT-mode */
hw->portmode |= NT_TIMER;
hw->nt_timer = 0;
hw->chan[ch].inst.pid.protocol[0] = ISDN_PID_L0_NT_S0;
hw->chan[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;
hw->chan[ch].inst.pid.layermask |= ISDN_LAYER(1);
pid.layermask |= ISDN_LAYER(1);
if (layermask[hw->param_idx] & ISDN_LAYER(2))
pid.protocol[2] = ISDN_PID_L2_LAPD_NET;
} else {
/* TE-mode */
hw->portmode |= PORT_MODE_TE;
hw->chan[ch].inst.pid.protocol[0] = ISDN_PID_L0_TE_S0;
pid.protocol[0] = ISDN_PID_L0_TE_S0;
}
if (debug & DEBUG_HFC_INIT)
printk(KERN_INFO
"%s %s: registering Stack\n",
hw->card_name, __FUNCTION__);
/* register stack */
err = hw_mISDNObj.ctrl(NULL, MGR_NEWSTACK | REQUEST, &hw->chan[ch].inst);
if (err) {
printk(KERN_ERR "%s %s: MGR_NEWSTACK | REQUEST err(%d)\n",
hw->card_name, __FUNCTION__, err);
goto free_channels;
}
hw->chan[ch].state = 0;
for (b = 0; b < 2; b++) {
err = hw_mISDNObj.ctrl(hw->chan[ch].inst.st, MGR_NEWSTACK | REQUEST, &hw->chan[b].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(hw->chan[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(hw->chan[ch].inst.st,
MGR_DELSTACK | REQUEST, NULL);
goto free_stack;
}
setup_channel(hw, hw->chan[ch].channel, -1);
for (b = 0; b < 2; b++) {
setup_channel(hw, b, -1);
}
/* delay some time */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout((100 * HZ) / 1000); /* Timeout 100ms */
hw_mISDNObj.ctrl(hw->chan[ch].inst.st, MGR_CTRLREADY | INDICATION,
NULL);
return (0);
free_stack:
hw_mISDNObj.ctrl(hw->chan[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(hfcsmini_hw * hw)
{
/* D-Channel protocol: (2=DSS1) */
hw->dpid = (protocol[hw->param_idx] & 0x0F);
if (hw->dpid == 0) {
printk(KERN_INFO
"%s %s: WARNING: wrong value for protocol[%i], "
"assuming 0x02 (DSS1)...\n",
hw->card_name, __FUNCTION__,
hw->param_idx);
hw->dpid = 0x02;
}
/* Line Interface TE or NT */
if (protocol[hw->param_idx] & 0x10)
hw->portmode |= PORT_MODE_NT;
else
hw->portmode |= PORT_MODE_TE;
/* Line Interface in S0 or Up mode */
if (!(protocol[hw->param_idx] & 0x40))
hw->portmode |= PORT_MODE_BUS_MASTER;
/* link B-channel loop */
if (protocol[hw->param_idx] & 0x80)
hw->portmode |= PORT_MODE_LOOP;
if (debug & DEBUG_HFC_INIT)
printk ("%s %s: protocol[%i]=0x%02x, dpid=%d,%s bus-mode:%s %s\n",
hw->card_name, __FUNCTION__, hw->param_idx,
protocol[hw->param_idx],
hw->dpid,
(hw->portmode & PORT_MODE_TE)?"TE":"NT",
(hw->portmode & PORT_MODE_BUS_MASTER)?"MASTER":"SLAVE",
(hw->portmode & PORT_MODE_LOOP)?"B-LOOP":""
);
}
/*****************************************/
/* initialise the HFC-S mini ISDN Chip */
/* return 0 on success. */
/*****************************************/
int
init_hfcsmini(hfcsmini_hw * hw)
{
int err = 0;
reg_r_fifo_thres threshold;
#if HFCBRIDGE == BRIDGE_HFCPCI
err = init_pci_bridge(hw);
if (err)
return(-ENODEV);
#endif
hw->chip_id.reg = read_hfcsmini(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.bit.v_chip_id);
switch (hw->chip_id.bit.v_chip_id) {
case CHIP_ID_HFCSMINI:
hw->max_fifo = 4;
hw->ti.reg = 5; /* 8 ms timer interval */
hw->max_z = 0x7F;
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.bit.v_chip_id);
return (err);
}
/* reset card */
write_hfcsmini(hw, R_CIRM, M_SRES); /* Reset On */
udelay(10);
write_hfcsmini(hw, R_CIRM, 0); /* Reset Off */
/* wait until fifo controller init sequence is finished */
hfcsmini_waitbusy(hw);
/* reset D-Channel S/T controller */
write_hfcsmini(hw, R_ST_CTRL1, M_D_RES);
if (hw->portmode & PORT_MODE_TE) {
/* TE mode */
hw->st_ctrl0.reg = 0;
write_hfcsmini(hw, R_ST_CLK_DLY, (M1_ST_CLK_DLY* 0xF));
write_hfcsmini(hw, R_ST_CTRL1, 0);
} else {
/* NT mode */
hw->st_ctrl0.reg = 4;
write_hfcsmini(hw, R_ST_CLK_DLY, ((M1_ST_SMPL * 0x6) | (M1_ST_CLK_DLY*0xC)));
write_hfcsmini(hw, R_ST_CTRL1, M_E_IGNO);
}
hw->st_ctrl2.reg = 0;
write_hfcsmini(hw, R_ST_CTRL0, hw->st_ctrl0.reg);
write_hfcsmini(hw, R_ST_CTRL2, hw->st_ctrl2.reg);
/* HFC Master/Slave Mode */
if (hw->portmode & PORT_MODE_BUS_MASTER)
hw->pcm_md0.bit.v_pcm_md = 1;
else
hw->pcm_md0.bit.v_pcm_md = 0;
write_hfcsmini(hw, R_PCM_MD0, hw->pcm_md0.reg);
write_hfcsmini(hw, R_PCM_MD1, 0);
write_hfcsmini(hw, R_PCM_MD2, 0);
/* setup threshold register */
threshold.bit.v_thres_tx = (HFCSMINI_TX_THRESHOLD / 8);
threshold.bit.v_thres_rx = (HFCSMINI_RX_THRESHOLD / 8);
write_hfcsmini(hw, R_FIFO_THRES, threshold.reg);
/* test timer irq */
enable_interrupts(hw);
mdelay(((1 << hw->ti.reg)+1)*2);
hw->testirq = 0;
if (hw->irq_cnt) {
printk(KERN_INFO
"%s %s: test IRQ OK, irq_cnt %i\n",
hw->card_name, __FUNCTION__, hw->irq_cnt);
disable_interrupts(hw);
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);
}
}
/*****************************************************/
/* disable all interrupts by disabling M_GLOB_IRQ_EN */
/*****************************************************/
void
disable_interrupts(hfcsmini_hw * hw)
{
u_long flags;
if (debug & DEBUG_HFC_IRQ)
printk(KERN_INFO "%s %s\n", hw->card_name, __FUNCTION__);
spin_lock_irqsave(&hw->mlock, flags);
hw->fifo_irqmsk.reg = 0;
hw->misc_irqmsk.reg = 0;
write_hfcsmini(hw, R_FIFO_IRQMSK, hw->fifo_irqmsk.reg);
write_hfcsmini(hw, R_MISC_IRQMSK, hw->misc_irqmsk.reg);
spin_unlock_irqrestore(&hw->mlock, flags);
}
/******************************************/
/* start interrupt and set interrupt mask */
/******************************************/
void
enable_interrupts(hfcsmini_hw * hw)
{
u_long flags;
if (debug & DEBUG_HFC_IRQ)
printk(KERN_INFO "%s %s\n", hw->card_name, __FUNCTION__);
spin_lock_irqsave(&hw->mlock, flags);
hw->fifo_irq.reg = 0;
hw->misc_irq.reg = 0;
write_hfcsmini(hw, R_TI, hw->ti.reg);
/* D-RX and D-TX interrupts enable */
hw->fifo_irqmsk.bit.v_fifo2_tx_irqmsk = 1;
hw->fifo_irqmsk.bit.v_fifo2_rx_irqmsk = 1;
/* clear pending ints */
if (read_hfcsmini(hw, R_FIFO_IRQ));
if (read_hfcsmini(hw, R_MISC_IRQ));
/* Finally enable IRQ output */
hw->misc_irqmsk.bit.v_st_irqmsk = 1; /* enable L1-state change irq */
hw->misc_irqmsk.bit.v_ti_irqmsk = 1; /* enable timer irq */
hw->misc_irqmsk.bit.v_irq_en = 1; /* IRQ global enable */
write_hfcsmini(hw, R_MISC_IRQMSK, hw->misc_irqmsk.reg);
spin_unlock_irqrestore(&hw->mlock, flags);
return;
}
/**************************************/
/* initialise the HFC-S mini hardware */
/* return 0 on success. */
/**************************************/
static int __devinit
setup_instance(hfcsmini_hw * hw)
{
int err;
hfcsmini_hw *previous_hw;
u_long flags;
if (debug & DEBUG_HFC_INIT)
printk(KERN_WARNING "%s %s\n",
hw->card_name, __FUNCTION__);
spin_lock_init(&hw->mlock);
spin_lock_init(&hw->rlock);
tasklet_init(&hw->tasklet, hfcsmini_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++;
/* add this instance to hardware list */
spin_lock_irqsave(&hw_mISDNObj.lock, flags);
list_add_tail(&hw->list, &hw_mISDNObj.ilist);
spin_unlock_irqrestore(&hw_mISDNObj.lock, flags);
/* init interrupt engine */
hw->testirq = 1;
if (debug & DEBUG_HFC_INIT)
printk(KERN_WARNING "%s %s: requesting IRQ %d\n",
hw->card_name, __FUNCTION__, hw->irq);
if (request_irq(hw->irq, hfcsmini_interrupt, SA_SHIRQ, "HFC-S mini", 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;
}
parse_module_params(hw);
err = init_hfcsmini(hw);
if (err)
goto out;
/* register all channels at ISDN procol stack */
err = init_mISDN_channels(hw);
if (err)
goto out;
/* delay some time to have mISDN initialazed complete */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout((100 * HZ) / 1000); /* Timeout 100ms */
/* Clear already pending ints */
if (read_hfcsmini(hw, R_FIFO_IRQ));
enable_interrupts(hw);
/* enable state machine */
write_hfcsmini(hw, R_ST_RD_STA, 0x0);
return(0);
out:
return (err);
}
#if HFCBRIDGE == BRIDGE_HFCPCI
/***********************/
/* PCI Bridge ID List */
/***********************/
static struct pci_device_id hfcsmini_ids[] = {
{.vendor = PCI_VENDOR_ID_CCD,
.device = 0xA001,
.subvendor = PCI_VENDOR_ID_CCD,
.subdevice = 0xFFFF,
.driver_data =
(unsigned long) &((hfcsmini_param) {0xFF, "HFC-S mini Evaluation Board"}),
},
{}
};
/******************************/
/* initialise the PCI Bridge */
/* return 0 on success. */
/******************************/
int
init_pci_bridge(hfcsmini_hw * hw)
{
outb(0x58, hw->iobase + 4); /* ID-register of bridge */
if ((inb(hw->iobase) & 0xf0) != 0x30) {
printk(KERN_INFO "%s %s: chip ID for PCI bridge invalid\n",
hw->card_name, __FUNCTION__);
release_region(hw->iobase, 8);
return(-EIO);
}
outb(0x60, hw->iobase + 4); /* CIRM register of bridge */
outb(0x07, hw->iobase); /* 15 PCI clocks aux access */
/* reset sequence */
outb(2, hw->iobase + 3); /* A0 = 1, reset = 0 (active) */
udelay(10);
outb(6, hw->iobase + 3); /* A0 = 1, reset = 1 (inactive) */
outb(0, hw->iobase + 1); /* write dummy register number */
/* wait until reset sequence finished, can be redefined after schematic review */
mdelay(300);
return (0);
}
/************************/
/* release single card */
/************************/
static void
release_card(hfcsmini_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);
}
/*****************************************/
/* PCI hotplug interface: probe new card */
/*****************************************/
static int __devinit
hfcsmini_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
hfcsmini_param *driver_data = (hfcsmini_param *) ent->driver_data;
hfcsmini_hw *hw;
int err = -ENOMEM;
if (!(hw = kmalloc(sizeof(hfcsmini_hw), GFP_ATOMIC))) {
printk(KERN_ERR "%s %s: No kmem for HFC-S mini card\n",
hw->card_name, __FUNCTION__);
return (err);
}
memset(hw, 0, sizeof(hfcsmini_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->iobase = (u_int) get_pcibase(pdev, 0);
if (!hw->iobase) {
printk(KERN_WARNING "%s no IO for PCI card found\n",
hw->card_name);
return(-EIO);
}
if (!request_region(hw->iobase, 8, "hfcmulti")) {
printk(KERN_WARNING "%s failed to request "
"address space at 0x%04x\n",
hw->card_name,
hw->iobase);
}
printk(KERN_INFO "%s defined at IOBASE 0x%#x IRQ %d HZ %d\n",
hw->card_name,
(u_int) hw->iobase,
hw->irq,
HZ);
/* enable IO */
pci_write_config_word(pdev, PCI_COMMAND, 0x01);
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
hfcsmini_pci_remove(struct pci_dev *pdev)
{
hfcsmini_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;
};
/*****************************/
/* Module PCI driver exports */
/*****************************/
static struct pci_driver hfcsmini_driver = {
name:DRIVER_NAME,
probe:hfcsmini_pci_probe,
remove:__devexit_p(hfcsmini_pci_remove),
id_table:hfcsmini_ids,
};
MODULE_DEVICE_TABLE(pci, hfcsmini_ids);
#endif
/***************/
/* Module init */
/***************/
static int __init
hfcsmini_init(void)
{
int err;
printk(KERN_INFO "HFC-S mini: %s driver Rev. %s (debug=%i)\n",
__FUNCTION__, mISDN_getrev(hfcsmini_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 = hfcsmini_manager;
hw_mISDNObj.DPROTO.protocol[0] = ISDN_PID_L0_TE_S0 |
ISDN_PID_L0_NT_S0;
hw_mISDNObj.DPROTO.protocol[1] = 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 "HFC-S mini: can't register HFC-S mini, error(%d)\n",
err);
goto out;
}
#if HFCBRIDGE == BRIDGE_HFCPCI
err = pci_register_driver(&hfcsmini_driver);
if (err < 0) {
goto out;
}
#if !defined(CONFIG_HOTPLUG)
if (err == 0) {
err = -ENODEV;
pci_unregister_driver(&hfcsmini_driver);
goto out;
}
#endif
#endif
printk(KERN_INFO "HFC-S mini: %d cards installed\n", card_cnt);
return 0;
out:
return (err);
}
static void __exit
hfcsmini_cleanup(void)
{
int err;
#if HFCBRIDGE == BRIDGE_HFCPCI
pci_unregister_driver(&hfcsmini_driver);
#endif
if ((err = mISDN_unregister(&hw_mISDNObj))) {
printk(KERN_ERR "HFC-S mini: can't unregister HFC-S mini, error(%d)\n",
err);
}
printk(KERN_INFO "%s: driver removed\n", __FUNCTION__);
}
module_init(hfcsmini_init);
module_exit(hfcsmini_cleanup);
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