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linuxdebug/drivers/isdn/hardware/mISDN/mISDNipac.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* isac.c ISAC specific routines
*
* Author Karsten Keil <keil@isdn4linux.de>
*
* Copyright 2009 by Karsten Keil <keil@isdn4linux.de>
*/
#include <linux/irqreturn.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/mISDNhw.h>
#include "ipac.h"
#define DBUSY_TIMER_VALUE 80
#define ARCOFI_USE 1
#define ISAC_REV "2.0"
MODULE_AUTHOR("Karsten Keil");
MODULE_VERSION(ISAC_REV);
MODULE_LICENSE("GPL v2");
#define ReadISAC(is, o) (is->read_reg(is->dch.hw, o + is->off))
#define WriteISAC(is, o, v) (is->write_reg(is->dch.hw, o + is->off, v))
#define ReadHSCX(h, o) (h->ip->read_reg(h->ip->hw, h->off + o))
#define WriteHSCX(h, o, v) (h->ip->write_reg(h->ip->hw, h->off + o, v))
#define ReadIPAC(ip, o) (ip->read_reg(ip->hw, o))
#define WriteIPAC(ip, o, v) (ip->write_reg(ip->hw, o, v))
static inline void
ph_command(struct isac_hw *isac, u8 command)
{
pr_debug("%s: ph_command %x\n", isac->name, command);
if (isac->type & IPAC_TYPE_ISACX)
WriteISAC(isac, ISACX_CIX0, (command << 4) | 0xE);
else
WriteISAC(isac, ISAC_CIX0, (command << 2) | 3);
}
static void
isac_ph_state_change(struct isac_hw *isac)
{
switch (isac->state) {
case (ISAC_IND_RS):
case (ISAC_IND_EI):
ph_command(isac, ISAC_CMD_DUI);
}
schedule_event(&isac->dch, FLG_PHCHANGE);
}
static void
isac_ph_state_bh(struct dchannel *dch)
{
struct isac_hw *isac = container_of(dch, struct isac_hw, dch);
switch (isac->state) {
case ISAC_IND_RS:
case ISAC_IND_EI:
dch->state = 0;
l1_event(dch->l1, HW_RESET_IND);
break;
case ISAC_IND_DID:
dch->state = 3;
l1_event(dch->l1, HW_DEACT_CNF);
break;
case ISAC_IND_DR:
case ISAC_IND_DR6:
dch->state = 3;
l1_event(dch->l1, HW_DEACT_IND);
break;
case ISAC_IND_PU:
dch->state = 4;
l1_event(dch->l1, HW_POWERUP_IND);
break;
case ISAC_IND_RSY:
if (dch->state <= 5) {
dch->state = 5;
l1_event(dch->l1, ANYSIGNAL);
} else {
dch->state = 8;
l1_event(dch->l1, LOSTFRAMING);
}
break;
case ISAC_IND_ARD:
dch->state = 6;
l1_event(dch->l1, INFO2);
break;
case ISAC_IND_AI8:
dch->state = 7;
l1_event(dch->l1, INFO4_P8);
break;
case ISAC_IND_AI10:
dch->state = 7;
l1_event(dch->l1, INFO4_P10);
break;
}
pr_debug("%s: TE newstate %x\n", isac->name, dch->state);
}
static void
isac_empty_fifo(struct isac_hw *isac, int count)
{
u8 *ptr;
pr_debug("%s: %s %d\n", isac->name, __func__, count);
if (!isac->dch.rx_skb) {
isac->dch.rx_skb = mI_alloc_skb(isac->dch.maxlen, GFP_ATOMIC);
if (!isac->dch.rx_skb) {
pr_info("%s: D receive out of memory\n", isac->name);
WriteISAC(isac, ISAC_CMDR, 0x80);
return;
}
}
if ((isac->dch.rx_skb->len + count) >= isac->dch.maxlen) {
pr_debug("%s: %s overrun %d\n", isac->name, __func__,
isac->dch.rx_skb->len + count);
WriteISAC(isac, ISAC_CMDR, 0x80);
return;
}
ptr = skb_put(isac->dch.rx_skb, count);
isac->read_fifo(isac->dch.hw, isac->off, ptr, count);
WriteISAC(isac, ISAC_CMDR, 0x80);
if (isac->dch.debug & DEBUG_HW_DFIFO) {
char pfx[MISDN_MAX_IDLEN + 16];
snprintf(pfx, MISDN_MAX_IDLEN + 15, "D-recv %s %d ",
isac->name, count);
print_hex_dump_bytes(pfx, DUMP_PREFIX_OFFSET, ptr, count);
}
}
static void
isac_fill_fifo(struct isac_hw *isac)
{
int count, more;
u8 *ptr;
if (!isac->dch.tx_skb)
return;
count = isac->dch.tx_skb->len - isac->dch.tx_idx;
if (count <= 0)
return;
more = 0;
if (count > 32) {
more = !0;
count = 32;
}
pr_debug("%s: %s %d\n", isac->name, __func__, count);
ptr = isac->dch.tx_skb->data + isac->dch.tx_idx;
isac->dch.tx_idx += count;
isac->write_fifo(isac->dch.hw, isac->off, ptr, count);
WriteISAC(isac, ISAC_CMDR, more ? 0x8 : 0xa);
if (test_and_set_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) {
pr_debug("%s: %s dbusytimer running\n", isac->name, __func__);
del_timer(&isac->dch.timer);
}
isac->dch.timer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
add_timer(&isac->dch.timer);
if (isac->dch.debug & DEBUG_HW_DFIFO) {
char pfx[MISDN_MAX_IDLEN + 16];
snprintf(pfx, MISDN_MAX_IDLEN + 15, "D-send %s %d ",
isac->name, count);
print_hex_dump_bytes(pfx, DUMP_PREFIX_OFFSET, ptr, count);
}
}
static void
isac_rme_irq(struct isac_hw *isac)
{
u8 val, count;
val = ReadISAC(isac, ISAC_RSTA);
if ((val & 0x70) != 0x20) {
if (val & 0x40) {
pr_debug("%s: ISAC RDO\n", isac->name);
#ifdef ERROR_STATISTIC
isac->dch.err_rx++;
#endif
}
if (!(val & 0x20)) {
pr_debug("%s: ISAC CRC error\n", isac->name);
#ifdef ERROR_STATISTIC
isac->dch.err_crc++;
#endif
}
WriteISAC(isac, ISAC_CMDR, 0x80);
dev_kfree_skb(isac->dch.rx_skb);
isac->dch.rx_skb = NULL;
} else {
count = ReadISAC(isac, ISAC_RBCL) & 0x1f;
if (count == 0)
count = 32;
isac_empty_fifo(isac, count);
recv_Dchannel(&isac->dch);
}
}
static void
isac_xpr_irq(struct isac_hw *isac)
{
if (test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags))
del_timer(&isac->dch.timer);
if (isac->dch.tx_skb && isac->dch.tx_idx < isac->dch.tx_skb->len) {
isac_fill_fifo(isac);
} else {
dev_kfree_skb(isac->dch.tx_skb);
if (get_next_dframe(&isac->dch))
isac_fill_fifo(isac);
}
}
static void
isac_retransmit(struct isac_hw *isac)
{
if (test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags))
del_timer(&isac->dch.timer);
if (test_bit(FLG_TX_BUSY, &isac->dch.Flags)) {
/* Restart frame */
isac->dch.tx_idx = 0;
isac_fill_fifo(isac);
} else if (isac->dch.tx_skb) { /* should not happen */
pr_info("%s: tx_skb exist but not busy\n", isac->name);
test_and_set_bit(FLG_TX_BUSY, &isac->dch.Flags);
isac->dch.tx_idx = 0;
isac_fill_fifo(isac);
} else {
pr_info("%s: ISAC XDU no TX_BUSY\n", isac->name);
if (get_next_dframe(&isac->dch))
isac_fill_fifo(isac);
}
}
static void
isac_mos_irq(struct isac_hw *isac)
{
u8 val;
int ret;
val = ReadISAC(isac, ISAC_MOSR);
pr_debug("%s: ISAC MOSR %02x\n", isac->name, val);
#if ARCOFI_USE
if (val & 0x08) {
if (!isac->mon_rx) {
isac->mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC);
if (!isac->mon_rx) {
pr_info("%s: ISAC MON RX out of memory!\n",
isac->name);
isac->mocr &= 0xf0;
isac->mocr |= 0x0a;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
goto afterMONR0;
} else
isac->mon_rxp = 0;
}
if (isac->mon_rxp >= MAX_MON_FRAME) {
isac->mocr &= 0xf0;
isac->mocr |= 0x0a;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mon_rxp = 0;
pr_debug("%s: ISAC MON RX overflow!\n", isac->name);
goto afterMONR0;
}
isac->mon_rx[isac->mon_rxp++] = ReadISAC(isac, ISAC_MOR0);
pr_debug("%s: ISAC MOR0 %02x\n", isac->name,
isac->mon_rx[isac->mon_rxp - 1]);
if (isac->mon_rxp == 1) {
isac->mocr |= 0x04;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
}
}
afterMONR0:
if (val & 0x80) {
if (!isac->mon_rx) {
isac->mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC);
if (!isac->mon_rx) {
pr_info("%s: ISAC MON RX out of memory!\n",
isac->name);
isac->mocr &= 0x0f;
isac->mocr |= 0xa0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
goto afterMONR1;
} else
isac->mon_rxp = 0;
}
if (isac->mon_rxp >= MAX_MON_FRAME) {
isac->mocr &= 0x0f;
isac->mocr |= 0xa0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mon_rxp = 0;
pr_debug("%s: ISAC MON RX overflow!\n", isac->name);
goto afterMONR1;
}
isac->mon_rx[isac->mon_rxp++] = ReadISAC(isac, ISAC_MOR1);
pr_debug("%s: ISAC MOR1 %02x\n", isac->name,
isac->mon_rx[isac->mon_rxp - 1]);
isac->mocr |= 0x40;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
}
afterMONR1:
if (val & 0x04) {
isac->mocr &= 0xf0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mocr |= 0x0a;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
if (isac->monitor) {
ret = isac->monitor(isac->dch.hw, MONITOR_RX_0,
isac->mon_rx, isac->mon_rxp);
if (ret)
kfree(isac->mon_rx);
} else {
pr_info("%s: MONITOR 0 received %d but no user\n",
isac->name, isac->mon_rxp);
kfree(isac->mon_rx);
}
isac->mon_rx = NULL;
isac->mon_rxp = 0;
}
if (val & 0x40) {
isac->mocr &= 0x0f;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mocr |= 0xa0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
if (isac->monitor) {
ret = isac->monitor(isac->dch.hw, MONITOR_RX_1,
isac->mon_rx, isac->mon_rxp);
if (ret)
kfree(isac->mon_rx);
} else {
pr_info("%s: MONITOR 1 received %d but no user\n",
isac->name, isac->mon_rxp);
kfree(isac->mon_rx);
}
isac->mon_rx = NULL;
isac->mon_rxp = 0;
}
if (val & 0x02) {
if ((!isac->mon_tx) || (isac->mon_txc &&
(isac->mon_txp >= isac->mon_txc) && !(val & 0x08))) {
isac->mocr &= 0xf0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mocr |= 0x0a;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
if (isac->monitor)
isac->monitor(isac->dch.hw,
MONITOR_TX_0, NULL, 0);
}
kfree(isac->mon_tx);
isac->mon_tx = NULL;
isac->mon_txc = 0;
isac->mon_txp = 0;
goto AfterMOX0;
}
if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
if (isac->monitor)
isac->monitor(isac->dch.hw,
MONITOR_TX_0, NULL, 0);
kfree(isac->mon_tx);
isac->mon_tx = NULL;
isac->mon_txc = 0;
isac->mon_txp = 0;
goto AfterMOX0;
}
WriteISAC(isac, ISAC_MOX0, isac->mon_tx[isac->mon_txp++]);
pr_debug("%s: ISAC %02x -> MOX0\n", isac->name,
isac->mon_tx[isac->mon_txp - 1]);
}
AfterMOX0:
if (val & 0x20) {
if ((!isac->mon_tx) || (isac->mon_txc &&
(isac->mon_txp >= isac->mon_txc) && !(val & 0x80))) {
isac->mocr &= 0x0f;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
isac->mocr |= 0xa0;
WriteISAC(isac, ISAC_MOCR, isac->mocr);
if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
if (isac->monitor)
isac->monitor(isac->dch.hw,
MONITOR_TX_1, NULL, 0);
}
kfree(isac->mon_tx);
isac->mon_tx = NULL;
isac->mon_txc = 0;
isac->mon_txp = 0;
goto AfterMOX1;
}
if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) {
if (isac->monitor)
isac->monitor(isac->dch.hw,
MONITOR_TX_1, NULL, 0);
kfree(isac->mon_tx);
isac->mon_tx = NULL;
isac->mon_txc = 0;
isac->mon_txp = 0;
goto AfterMOX1;
}
WriteISAC(isac, ISAC_MOX1, isac->mon_tx[isac->mon_txp++]);
pr_debug("%s: ISAC %02x -> MOX1\n", isac->name,
isac->mon_tx[isac->mon_txp - 1]);
}
AfterMOX1:
val = 0; /* dummy to avoid warning */
#endif
}
static void
isac_cisq_irq(struct isac_hw *isac) {
u8 val;
val = ReadISAC(isac, ISAC_CIR0);
pr_debug("%s: ISAC CIR0 %02X\n", isac->name, val);
if (val & 2) {
pr_debug("%s: ph_state change %x->%x\n", isac->name,
isac->state, (val >> 2) & 0xf);
isac->state = (val >> 2) & 0xf;
isac_ph_state_change(isac);
}
if (val & 1) {
val = ReadISAC(isac, ISAC_CIR1);
pr_debug("%s: ISAC CIR1 %02X\n", isac->name, val);
}
}
static void
isacsx_cic_irq(struct isac_hw *isac)
{
u8 val;
val = ReadISAC(isac, ISACX_CIR0);
pr_debug("%s: ISACX CIR0 %02X\n", isac->name, val);
if (val & ISACX_CIR0_CIC0) {
pr_debug("%s: ph_state change %x->%x\n", isac->name,
isac->state, val >> 4);
isac->state = val >> 4;
isac_ph_state_change(isac);
}
}
static void
isacsx_rme_irq(struct isac_hw *isac)
{
int count;
u8 val;
val = ReadISAC(isac, ISACX_RSTAD);
if ((val & (ISACX_RSTAD_VFR |
ISACX_RSTAD_RDO |
ISACX_RSTAD_CRC |
ISACX_RSTAD_RAB))
!= (ISACX_RSTAD_VFR | ISACX_RSTAD_CRC)) {
pr_debug("%s: RSTAD %#x, dropped\n", isac->name, val);
#ifdef ERROR_STATISTIC
if (val & ISACX_RSTAD_CRC)
isac->dch.err_rx++;
else
isac->dch.err_crc++;
#endif
WriteISAC(isac, ISACX_CMDRD, ISACX_CMDRD_RMC);
dev_kfree_skb(isac->dch.rx_skb);
isac->dch.rx_skb = NULL;
} else {
count = ReadISAC(isac, ISACX_RBCLD) & 0x1f;
if (count == 0)
count = 32;
isac_empty_fifo(isac, count);
if (isac->dch.rx_skb) {
skb_trim(isac->dch.rx_skb, isac->dch.rx_skb->len - 1);
pr_debug("%s: dchannel received %d\n", isac->name,
isac->dch.rx_skb->len);
recv_Dchannel(&isac->dch);
}
}
}
irqreturn_t
mISDNisac_irq(struct isac_hw *isac, u8 val)
{
if (unlikely(!val))
return IRQ_NONE;
pr_debug("%s: ISAC interrupt %02x\n", isac->name, val);
if (isac->type & IPAC_TYPE_ISACX) {
if (val & ISACX__CIC)
isacsx_cic_irq(isac);
if (val & ISACX__ICD) {
val = ReadISAC(isac, ISACX_ISTAD);
pr_debug("%s: ISTAD %02x\n", isac->name, val);
if (val & ISACX_D_XDU) {
pr_debug("%s: ISAC XDU\n", isac->name);
#ifdef ERROR_STATISTIC
isac->dch.err_tx++;
#endif
isac_retransmit(isac);
}
if (val & ISACX_D_XMR) {
pr_debug("%s: ISAC XMR\n", isac->name);
#ifdef ERROR_STATISTIC
isac->dch.err_tx++;
#endif
isac_retransmit(isac);
}
if (val & ISACX_D_XPR)
isac_xpr_irq(isac);
if (val & ISACX_D_RFO) {
pr_debug("%s: ISAC RFO\n", isac->name);
WriteISAC(isac, ISACX_CMDRD, ISACX_CMDRD_RMC);
}
if (val & ISACX_D_RME)
isacsx_rme_irq(isac);
if (val & ISACX_D_RPF)
isac_empty_fifo(isac, 0x20);
}
} else {
if (val & 0x80) /* RME */
isac_rme_irq(isac);
if (val & 0x40) /* RPF */
isac_empty_fifo(isac, 32);
if (val & 0x10) /* XPR */
isac_xpr_irq(isac);
if (val & 0x04) /* CISQ */
isac_cisq_irq(isac);
if (val & 0x20) /* RSC - never */
pr_debug("%s: ISAC RSC interrupt\n", isac->name);
if (val & 0x02) /* SIN - never */
pr_debug("%s: ISAC SIN interrupt\n", isac->name);
if (val & 0x01) { /* EXI */
val = ReadISAC(isac, ISAC_EXIR);
pr_debug("%s: ISAC EXIR %02x\n", isac->name, val);
if (val & 0x80) /* XMR */
pr_debug("%s: ISAC XMR\n", isac->name);
if (val & 0x40) { /* XDU */
pr_debug("%s: ISAC XDU\n", isac->name);
#ifdef ERROR_STATISTIC
isac->dch.err_tx++;
#endif
isac_retransmit(isac);
}
if (val & 0x04) /* MOS */
isac_mos_irq(isac);
}
}
return IRQ_HANDLED;
}
EXPORT_SYMBOL(mISDNisac_irq);
static int
isac_l1hw(struct mISDNchannel *ch, struct sk_buff *skb)
{
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
struct dchannel *dch = container_of(dev, struct dchannel, dev);
struct isac_hw *isac = container_of(dch, struct isac_hw, dch);
int ret = -EINVAL;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
u32 id;
u_long flags;
switch (hh->prim) {
case PH_DATA_REQ:
spin_lock_irqsave(isac->hwlock, flags);
ret = dchannel_senddata(dch, skb);
if (ret > 0) { /* direct TX */
id = hh->id; /* skb can be freed */
isac_fill_fifo(isac);
ret = 0;
spin_unlock_irqrestore(isac->hwlock, flags);
queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
} else
spin_unlock_irqrestore(isac->hwlock, flags);
return ret;
case PH_ACTIVATE_REQ:
ret = l1_event(dch->l1, hh->prim);
break;
case PH_DEACTIVATE_REQ:
test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
ret = l1_event(dch->l1, hh->prim);
break;
}
if (!ret)
dev_kfree_skb(skb);
return ret;
}
static int
isac_ctrl(struct isac_hw *isac, u32 cmd, unsigned long para)
{
u8 tl = 0;
unsigned long flags;
int ret = 0;
switch (cmd) {
case HW_TESTLOOP:
spin_lock_irqsave(isac->hwlock, flags);
if (!(isac->type & IPAC_TYPE_ISACX)) {
/* TODO: implement for IPAC_TYPE_ISACX */
if (para & 1) /* B1 */
tl |= 0x0c;
else if (para & 2) /* B2 */
tl |= 0x3;
/* we only support IOM2 mode */
WriteISAC(isac, ISAC_SPCR, tl);
if (tl)
WriteISAC(isac, ISAC_ADF1, 0x8);
else
WriteISAC(isac, ISAC_ADF1, 0x0);
}
spin_unlock_irqrestore(isac->hwlock, flags);
break;
case HW_TIMER3_VALUE:
ret = l1_event(isac->dch.l1, HW_TIMER3_VALUE | (para & 0xff));
break;
default:
pr_debug("%s: %s unknown command %x %lx\n", isac->name,
__func__, cmd, para);
ret = -1;
}
return ret;
}
static int
isac_l1cmd(struct dchannel *dch, u32 cmd)
{
struct isac_hw *isac = container_of(dch, struct isac_hw, dch);
u_long flags;
pr_debug("%s: cmd(%x) state(%02x)\n", isac->name, cmd, isac->state);
switch (cmd) {
case INFO3_P8:
spin_lock_irqsave(isac->hwlock, flags);
ph_command(isac, ISAC_CMD_AR8);
spin_unlock_irqrestore(isac->hwlock, flags);
break;
case INFO3_P10:
spin_lock_irqsave(isac->hwlock, flags);
ph_command(isac, ISAC_CMD_AR10);
spin_unlock_irqrestore(isac->hwlock, flags);
break;
case HW_RESET_REQ:
spin_lock_irqsave(isac->hwlock, flags);
if ((isac->state == ISAC_IND_EI) ||
(isac->state == ISAC_IND_DR) ||
(isac->state == ISAC_IND_DR6) ||
(isac->state == ISAC_IND_RS))
ph_command(isac, ISAC_CMD_TIM);
else
ph_command(isac, ISAC_CMD_RS);
spin_unlock_irqrestore(isac->hwlock, flags);
break;
case HW_DEACT_REQ:
skb_queue_purge(&dch->squeue);
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);
if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags))
del_timer(&dch->timer);
break;
case HW_POWERUP_REQ:
spin_lock_irqsave(isac->hwlock, flags);
ph_command(isac, ISAC_CMD_TIM);
spin_unlock_irqrestore(isac->hwlock, flags);
break;
case PH_ACTIVATE_IND:
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
_queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
GFP_ATOMIC);
break;
case PH_DEACTIVATE_IND:
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
_queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
GFP_ATOMIC);
break;
default:
pr_debug("%s: %s unknown command %x\n", isac->name,
__func__, cmd);
return -1;
}
return 0;
}
static void
isac_release(struct isac_hw *isac)
{
if (isac->type & IPAC_TYPE_ISACX)
WriteISAC(isac, ISACX_MASK, 0xff);
else if (isac->type != 0)
WriteISAC(isac, ISAC_MASK, 0xff);
if (isac->dch.timer.function != NULL) {
del_timer(&isac->dch.timer);
isac->dch.timer.function = NULL;
}
kfree(isac->mon_rx);
isac->mon_rx = NULL;
kfree(isac->mon_tx);
isac->mon_tx = NULL;
if (isac->dch.l1)
l1_event(isac->dch.l1, CLOSE_CHANNEL);
mISDN_freedchannel(&isac->dch);
}
static void
dbusy_timer_handler(struct timer_list *t)
{
struct isac_hw *isac = from_timer(isac, t, dch.timer);
int rbch, star;
u_long flags;
if (test_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) {
spin_lock_irqsave(isac->hwlock, flags);
rbch = ReadISAC(isac, ISAC_RBCH);
star = ReadISAC(isac, ISAC_STAR);
pr_debug("%s: D-Channel Busy RBCH %02x STAR %02x\n",
isac->name, rbch, star);
if (rbch & ISAC_RBCH_XAC) /* D-Channel Busy */
test_and_set_bit(FLG_L1_BUSY, &isac->dch.Flags);
else {
/* discard frame; reset transceiver */
test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags);
if (isac->dch.tx_idx)
isac->dch.tx_idx = 0;
else
pr_info("%s: ISAC D-Channel Busy no tx_idx\n",
isac->name);
/* Transmitter reset */
WriteISAC(isac, ISAC_CMDR, 0x01);
}
spin_unlock_irqrestore(isac->hwlock, flags);
}
}
static int
open_dchannel_caller(struct isac_hw *isac, struct channel_req *rq, void *caller)
{
pr_debug("%s: %s dev(%d) open from %p\n", isac->name, __func__,
isac->dch.dev.id, caller);
if (rq->protocol != ISDN_P_TE_S0)
return -EINVAL;
if (rq->adr.channel == 1)
/* E-Channel not supported */
return -EINVAL;
rq->ch = &isac->dch.dev.D;
rq->ch->protocol = rq->protocol;
if (isac->dch.state == 7)
_queue_data(rq->ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
0, NULL, GFP_KERNEL);
return 0;
}
static int
open_dchannel(struct isac_hw *isac, struct channel_req *rq)
{
return open_dchannel_caller(isac, rq, __builtin_return_address(0));
}
static const char *ISACVer[] =
{"2086/2186 V1.1", "2085 B1", "2085 B2",
"2085 V2.3"};
static int
isac_init(struct isac_hw *isac)
{
u8 val;
int err = 0;
if (!isac->dch.l1) {
err = create_l1(&isac->dch, isac_l1cmd);
if (err)
return err;
}
isac->mon_tx = NULL;
isac->mon_rx = NULL;
timer_setup(&isac->dch.timer, dbusy_timer_handler, 0);
isac->mocr = 0xaa;
if (isac->type & IPAC_TYPE_ISACX) {
/* Disable all IRQ */
WriteISAC(isac, ISACX_MASK, 0xff);
val = ReadISAC(isac, ISACX_STARD);
pr_debug("%s: ISACX STARD %x\n", isac->name, val);
val = ReadISAC(isac, ISACX_ISTAD);
pr_debug("%s: ISACX ISTAD %x\n", isac->name, val);
val = ReadISAC(isac, ISACX_ISTA);
pr_debug("%s: ISACX ISTA %x\n", isac->name, val);
/* clear LDD */
WriteISAC(isac, ISACX_TR_CONF0, 0x00);
/* enable transmitter */
WriteISAC(isac, ISACX_TR_CONF2, 0x00);
/* transparent mode 0, RAC, stop/go */
WriteISAC(isac, ISACX_MODED, 0xc9);
/* all HDLC IRQ unmasked */
val = ReadISAC(isac, ISACX_ID);
if (isac->dch.debug & DEBUG_HW)
pr_notice("%s: ISACX Design ID %x\n",
isac->name, val & 0x3f);
val = ReadISAC(isac, ISACX_CIR0);
pr_debug("%s: ISACX CIR0 %02X\n", isac->name, val);
isac->state = val >> 4;
isac_ph_state_change(isac);
ph_command(isac, ISAC_CMD_RS);
WriteISAC(isac, ISACX_MASK, IPACX__ON);
WriteISAC(isac, ISACX_MASKD, 0x00);
} else { /* old isac */
WriteISAC(isac, ISAC_MASK, 0xff);
val = ReadISAC(isac, ISAC_STAR);
pr_debug("%s: ISAC STAR %x\n", isac->name, val);
val = ReadISAC(isac, ISAC_MODE);
pr_debug("%s: ISAC MODE %x\n", isac->name, val);
val = ReadISAC(isac, ISAC_ADF2);
pr_debug("%s: ISAC ADF2 %x\n", isac->name, val);
val = ReadISAC(isac, ISAC_ISTA);
pr_debug("%s: ISAC ISTA %x\n", isac->name, val);
if (val & 0x01) {
val = ReadISAC(isac, ISAC_EXIR);
pr_debug("%s: ISAC EXIR %x\n", isac->name, val);
}
val = ReadISAC(isac, ISAC_RBCH);
if (isac->dch.debug & DEBUG_HW)
pr_notice("%s: ISAC version (%x): %s\n", isac->name,
val, ISACVer[(val >> 5) & 3]);
isac->type |= ((val >> 5) & 3);
if (!isac->adf2)
isac->adf2 = 0x80;
if (!(isac->adf2 & 0x80)) { /* only IOM 2 Mode */
pr_info("%s: only support IOM2 mode but adf2=%02x\n",
isac->name, isac->adf2);
isac_release(isac);
return -EINVAL;
}
WriteISAC(isac, ISAC_ADF2, isac->adf2);
WriteISAC(isac, ISAC_SQXR, 0x2f);
WriteISAC(isac, ISAC_SPCR, 0x00);
WriteISAC(isac, ISAC_STCR, 0x70);
WriteISAC(isac, ISAC_MODE, 0xc9);
WriteISAC(isac, ISAC_TIMR, 0x00);
WriteISAC(isac, ISAC_ADF1, 0x00);
val = ReadISAC(isac, ISAC_CIR0);
pr_debug("%s: ISAC CIR0 %x\n", isac->name, val);
isac->state = (val >> 2) & 0xf;
isac_ph_state_change(isac);
ph_command(isac, ISAC_CMD_RS);
WriteISAC(isac, ISAC_MASK, 0);
}
return err;
}
int
mISDNisac_init(struct isac_hw *isac, void *hw)
{
mISDN_initdchannel(&isac->dch, MAX_DFRAME_LEN_L1, isac_ph_state_bh);
isac->dch.hw = hw;
isac->dch.dev.D.send = isac_l1hw;
isac->init = isac_init;
isac->release = isac_release;
isac->ctrl = isac_ctrl;
isac->open = open_dchannel;
isac->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0);
isac->dch.dev.nrbchan = 2;
return 0;
}
EXPORT_SYMBOL(mISDNisac_init);
static void
waitforCEC(struct hscx_hw *hx)
{
u8 starb, to = 50;
while (to) {
starb = ReadHSCX(hx, IPAC_STARB);
if (!(starb & 0x04))
break;
udelay(1);
to--;
}
if (to < 50)
pr_debug("%s: B%1d CEC %d us\n", hx->ip->name, hx->bch.nr,
50 - to);
if (!to)
pr_info("%s: B%1d CEC timeout\n", hx->ip->name, hx->bch.nr);
}
static void
waitforXFW(struct hscx_hw *hx)
{
u8 starb, to = 50;
while (to) {
starb = ReadHSCX(hx, IPAC_STARB);
if ((starb & 0x44) == 0x40)
break;
udelay(1);
to--;
}
if (to < 50)
pr_debug("%s: B%1d XFW %d us\n", hx->ip->name, hx->bch.nr,
50 - to);
if (!to)
pr_info("%s: B%1d XFW timeout\n", hx->ip->name, hx->bch.nr);
}
static void
hscx_cmdr(struct hscx_hw *hx, u8 cmd)
{
if (hx->ip->type & IPAC_TYPE_IPACX)
WriteHSCX(hx, IPACX_CMDRB, cmd);
else {
waitforCEC(hx);
WriteHSCX(hx, IPAC_CMDRB, cmd);
}
}
static void
hscx_empty_fifo(struct hscx_hw *hscx, u8 count)
{
u8 *p;
int maxlen;
pr_debug("%s: B%1d %d\n", hscx->ip->name, hscx->bch.nr, count);
if (test_bit(FLG_RX_OFF, &hscx->bch.Flags)) {
hscx->bch.dropcnt += count;
hscx_cmdr(hscx, 0x80); /* RMC */
return;
}
maxlen = bchannel_get_rxbuf(&hscx->bch, count);
if (maxlen < 0) {
hscx_cmdr(hscx, 0x80); /* RMC */
if (hscx->bch.rx_skb)
skb_trim(hscx->bch.rx_skb, 0);
pr_warn("%s.B%d: No bufferspace for %d bytes\n",
hscx->ip->name, hscx->bch.nr, count);
return;
}
p = skb_put(hscx->bch.rx_skb, count);
if (hscx->ip->type & IPAC_TYPE_IPACX)
hscx->ip->read_fifo(hscx->ip->hw,
hscx->off + IPACX_RFIFOB, p, count);
else
hscx->ip->read_fifo(hscx->ip->hw,
hscx->off, p, count);
hscx_cmdr(hscx, 0x80); /* RMC */
if (hscx->bch.debug & DEBUG_HW_BFIFO) {
snprintf(hscx->log, 64, "B%1d-recv %s %d ",
hscx->bch.nr, hscx->ip->name, count);
print_hex_dump_bytes(hscx->log, DUMP_PREFIX_OFFSET, p, count);
}
}
static void
hscx_fill_fifo(struct hscx_hw *hscx)
{
int count, more;
u8 *p;
if (!hscx->bch.tx_skb) {
if (!test_bit(FLG_TX_EMPTY, &hscx->bch.Flags))
return;
count = hscx->fifo_size;
more = 1;
p = hscx->log;
memset(p, hscx->bch.fill[0], count);
} else {
count = hscx->bch.tx_skb->len - hscx->bch.tx_idx;
if (count <= 0)
return;
p = hscx->bch.tx_skb->data + hscx->bch.tx_idx;
more = test_bit(FLG_TRANSPARENT, &hscx->bch.Flags) ? 1 : 0;
if (count > hscx->fifo_size) {
count = hscx->fifo_size;
more = 1;
}
pr_debug("%s: B%1d %d/%d/%d\n", hscx->ip->name, hscx->bch.nr,
count, hscx->bch.tx_idx, hscx->bch.tx_skb->len);
hscx->bch.tx_idx += count;
}
if (hscx->ip->type & IPAC_TYPE_IPACX)
hscx->ip->write_fifo(hscx->ip->hw,
hscx->off + IPACX_XFIFOB, p, count);
else {
waitforXFW(hscx);
hscx->ip->write_fifo(hscx->ip->hw,
hscx->off, p, count);
}
hscx_cmdr(hscx, more ? 0x08 : 0x0a);
if (hscx->bch.tx_skb && (hscx->bch.debug & DEBUG_HW_BFIFO)) {
snprintf(hscx->log, 64, "B%1d-send %s %d ",
hscx->bch.nr, hscx->ip->name, count);
print_hex_dump_bytes(hscx->log, DUMP_PREFIX_OFFSET, p, count);
}
}
static void
hscx_xpr(struct hscx_hw *hx)
{
if (hx->bch.tx_skb && hx->bch.tx_idx < hx->bch.tx_skb->len) {
hscx_fill_fifo(hx);
} else {
dev_kfree_skb(hx->bch.tx_skb);
if (get_next_bframe(&hx->bch)) {
hscx_fill_fifo(hx);
test_and_clear_bit(FLG_TX_EMPTY, &hx->bch.Flags);
} else if (test_bit(FLG_TX_EMPTY, &hx->bch.Flags)) {
hscx_fill_fifo(hx);
}
}
}
static void
ipac_rme(struct hscx_hw *hx)
{
int count;
u8 rstab;
if (hx->ip->type & IPAC_TYPE_IPACX)
rstab = ReadHSCX(hx, IPACX_RSTAB);
else
rstab = ReadHSCX(hx, IPAC_RSTAB);
pr_debug("%s: B%1d RSTAB %02x\n", hx->ip->name, hx->bch.nr, rstab);
if ((rstab & 0xf0) != 0xa0) {
/* !(VFR && !RDO && CRC && !RAB) */
if (!(rstab & 0x80)) {
if (hx->bch.debug & DEBUG_HW_BCHANNEL)
pr_notice("%s: B%1d invalid frame\n",
hx->ip->name, hx->bch.nr);
}
if (rstab & 0x40) {
if (hx->bch.debug & DEBUG_HW_BCHANNEL)
pr_notice("%s: B%1d RDO proto=%x\n",
hx->ip->name, hx->bch.nr,
hx->bch.state);
}
if (!(rstab & 0x20)) {
if (hx->bch.debug & DEBUG_HW_BCHANNEL)
pr_notice("%s: B%1d CRC error\n",
hx->ip->name, hx->bch.nr);
}
hscx_cmdr(hx, 0x80); /* Do RMC */
return;
}
if (hx->ip->type & IPAC_TYPE_IPACX)
count = ReadHSCX(hx, IPACX_RBCLB);
else
count = ReadHSCX(hx, IPAC_RBCLB);
count &= (hx->fifo_size - 1);
if (count == 0)
count = hx->fifo_size;
hscx_empty_fifo(hx, count);
if (!hx->bch.rx_skb)
return;
if (hx->bch.rx_skb->len < 2) {
pr_debug("%s: B%1d frame too short %d\n",
hx->ip->name, hx->bch.nr, hx->bch.rx_skb->len);
skb_trim(hx->bch.rx_skb, 0);
} else {
skb_trim(hx->bch.rx_skb, hx->bch.rx_skb->len - 1);
recv_Bchannel(&hx->bch, 0, false);
}
}
static void
ipac_irq(struct hscx_hw *hx, u8 ista)
{
u8 istab, m, exirb = 0;
if (hx->ip->type & IPAC_TYPE_IPACX)
istab = ReadHSCX(hx, IPACX_ISTAB);
else if (hx->ip->type & IPAC_TYPE_IPAC) {
istab = ReadHSCX(hx, IPAC_ISTAB);
m = (hx->bch.nr & 1) ? IPAC__EXA : IPAC__EXB;
if (m & ista) {
exirb = ReadHSCX(hx, IPAC_EXIRB);
pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name,
hx->bch.nr, exirb);
}
} else if (hx->bch.nr & 2) { /* HSCX B */
if (ista & (HSCX__EXA | HSCX__ICA))
ipac_irq(&hx->ip->hscx[0], ista);
if (ista & HSCX__EXB) {
exirb = ReadHSCX(hx, IPAC_EXIRB);
pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name,
hx->bch.nr, exirb);
}
istab = ista & 0xF8;
} else { /* HSCX A */
istab = ReadHSCX(hx, IPAC_ISTAB);
if (ista & HSCX__EXA) {
exirb = ReadHSCX(hx, IPAC_EXIRB);
pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name,
hx->bch.nr, exirb);
}
istab = istab & 0xF8;
}
if (exirb & IPAC_B_XDU)
istab |= IPACX_B_XDU;
if (exirb & IPAC_B_RFO)
istab |= IPACX_B_RFO;
pr_debug("%s: B%1d ISTAB %02x\n", hx->ip->name, hx->bch.nr, istab);
if (!test_bit(FLG_ACTIVE, &hx->bch.Flags))
return;
if (istab & IPACX_B_RME)
ipac_rme(hx);
if (istab & IPACX_B_RPF) {
hscx_empty_fifo(hx, hx->fifo_size);
if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags))
recv_Bchannel(&hx->bch, 0, false);
}
if (istab & IPACX_B_RFO) {
pr_debug("%s: B%1d RFO error\n", hx->ip->name, hx->bch.nr);
hscx_cmdr(hx, 0x40); /* RRES */
}
if (istab & IPACX_B_XPR)
hscx_xpr(hx);
if (istab & IPACX_B_XDU) {
if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags)) {
if (test_bit(FLG_FILLEMPTY, &hx->bch.Flags))
test_and_set_bit(FLG_TX_EMPTY, &hx->bch.Flags);
hscx_xpr(hx);
return;
}
pr_debug("%s: B%1d XDU error at len %d\n", hx->ip->name,
hx->bch.nr, hx->bch.tx_idx);
hx->bch.tx_idx = 0;
hscx_cmdr(hx, 0x01); /* XRES */
}
}
irqreturn_t
mISDNipac_irq(struct ipac_hw *ipac, int maxloop)
{
int cnt = maxloop + 1;
u8 ista, istad;
struct isac_hw *isac = &ipac->isac;
if (ipac->type & IPAC_TYPE_IPACX) {
ista = ReadIPAC(ipac, ISACX_ISTA);
while (ista && --cnt) {
pr_debug("%s: ISTA %02x\n", ipac->name, ista);
if (ista & IPACX__ICA)
ipac_irq(&ipac->hscx[0], ista);
if (ista & IPACX__ICB)
ipac_irq(&ipac->hscx[1], ista);
if (ista & (ISACX__ICD | ISACX__CIC))
mISDNisac_irq(&ipac->isac, ista);
ista = ReadIPAC(ipac, ISACX_ISTA);
}
} else if (ipac->type & IPAC_TYPE_IPAC) {
ista = ReadIPAC(ipac, IPAC_ISTA);
while (ista && --cnt) {
pr_debug("%s: ISTA %02x\n", ipac->name, ista);
if (ista & (IPAC__ICD | IPAC__EXD)) {
istad = ReadISAC(isac, ISAC_ISTA);
pr_debug("%s: ISTAD %02x\n", ipac->name, istad);
if (istad & IPAC_D_TIN2)
pr_debug("%s TIN2 irq\n", ipac->name);
if (ista & IPAC__EXD)
istad |= 1; /* ISAC EXI */
mISDNisac_irq(isac, istad);
}
if (ista & (IPAC__ICA | IPAC__EXA))
ipac_irq(&ipac->hscx[0], ista);
if (ista & (IPAC__ICB | IPAC__EXB))
ipac_irq(&ipac->hscx[1], ista);
ista = ReadIPAC(ipac, IPAC_ISTA);
}
} else if (ipac->type & IPAC_TYPE_HSCX) {
while (--cnt) {
ista = ReadIPAC(ipac, IPAC_ISTAB + ipac->hscx[1].off);
pr_debug("%s: B2 ISTA %02x\n", ipac->name, ista);
if (ista)
ipac_irq(&ipac->hscx[1], ista);
istad = ReadISAC(isac, ISAC_ISTA);
pr_debug("%s: ISTAD %02x\n", ipac->name, istad);
if (istad)
mISDNisac_irq(isac, istad);
if (0 == (ista | istad))
break;
}
}
if (cnt > maxloop) /* only for ISAC/HSCX without PCI IRQ test */
return IRQ_NONE;
if (cnt < maxloop)
pr_debug("%s: %d irqloops cpu%d\n", ipac->name,
maxloop - cnt, smp_processor_id());
if (maxloop && !cnt)
pr_notice("%s: %d IRQ LOOP cpu%d\n", ipac->name,
maxloop, smp_processor_id());
return IRQ_HANDLED;
}
EXPORT_SYMBOL(mISDNipac_irq);
static int
hscx_mode(struct hscx_hw *hscx, u32 bprotocol)
{
pr_debug("%s: HSCX %c protocol %x-->%x ch %d\n", hscx->ip->name,
'@' + hscx->bch.nr, hscx->bch.state, bprotocol, hscx->bch.nr);
if (hscx->ip->type & IPAC_TYPE_IPACX) {
if (hscx->bch.nr & 1) { /* B1 and ICA */
WriteIPAC(hscx->ip, ISACX_BCHA_TSDP_BC1, 0x80);
WriteIPAC(hscx->ip, ISACX_BCHA_CR, 0x88);
} else { /* B2 and ICB */
WriteIPAC(hscx->ip, ISACX_BCHB_TSDP_BC1, 0x81);
WriteIPAC(hscx->ip, ISACX_BCHB_CR, 0x88);
}
switch (bprotocol) {
case ISDN_P_NONE: /* init */
WriteHSCX(hscx, IPACX_MODEB, 0xC0); /* rec off */
WriteHSCX(hscx, IPACX_EXMB, 0x30); /* std adj. */
WriteHSCX(hscx, IPACX_MASKB, 0xFF); /* ints off */
hscx_cmdr(hscx, 0x41);
test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_RAW:
WriteHSCX(hscx, IPACX_MODEB, 0x88); /* ex trans */
WriteHSCX(hscx, IPACX_EXMB, 0x00); /* trans */
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPACX_MASKB, IPACX_B_ON);
test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_HDLC:
WriteHSCX(hscx, IPACX_MODEB, 0xC0); /* trans */
WriteHSCX(hscx, IPACX_EXMB, 0x00); /* hdlc,crc */
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPACX_MASKB, IPACX_B_ON);
test_and_set_bit(FLG_HDLC, &hscx->bch.Flags);
break;
default:
pr_info("%s: protocol not known %x\n", hscx->ip->name,
bprotocol);
return -ENOPROTOOPT;
}
} else if (hscx->ip->type & IPAC_TYPE_IPAC) { /* IPAC */
WriteHSCX(hscx, IPAC_CCR1, 0x82);
WriteHSCX(hscx, IPAC_CCR2, 0x30);
WriteHSCX(hscx, IPAC_XCCR, 0x07);
WriteHSCX(hscx, IPAC_RCCR, 0x07);
WriteHSCX(hscx, IPAC_TSAX, hscx->slot);
WriteHSCX(hscx, IPAC_TSAR, hscx->slot);
switch (bprotocol) {
case ISDN_P_NONE:
WriteHSCX(hscx, IPAC_TSAX, 0x1F);
WriteHSCX(hscx, IPAC_TSAR, 0x1F);
WriteHSCX(hscx, IPAC_MODEB, 0x84);
WriteHSCX(hscx, IPAC_CCR1, 0x82);
WriteHSCX(hscx, IPAC_MASKB, 0xFF); /* ints off */
test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_RAW:
WriteHSCX(hscx, IPAC_MODEB, 0xe4); /* ex trans */
WriteHSCX(hscx, IPAC_CCR1, 0x82);
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPAC_MASKB, 0);
test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_HDLC:
WriteHSCX(hscx, IPAC_MODEB, 0x8c);
WriteHSCX(hscx, IPAC_CCR1, 0x8a);
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPAC_MASKB, 0);
test_and_set_bit(FLG_HDLC, &hscx->bch.Flags);
break;
default:
pr_info("%s: protocol not known %x\n", hscx->ip->name,
bprotocol);
return -ENOPROTOOPT;
}
} else if (hscx->ip->type & IPAC_TYPE_HSCX) { /* HSCX */
WriteHSCX(hscx, IPAC_CCR1, 0x85);
WriteHSCX(hscx, IPAC_CCR2, 0x30);
WriteHSCX(hscx, IPAC_XCCR, 0x07);
WriteHSCX(hscx, IPAC_RCCR, 0x07);
WriteHSCX(hscx, IPAC_TSAX, hscx->slot);
WriteHSCX(hscx, IPAC_TSAR, hscx->slot);
switch (bprotocol) {
case ISDN_P_NONE:
WriteHSCX(hscx, IPAC_TSAX, 0x1F);
WriteHSCX(hscx, IPAC_TSAR, 0x1F);
WriteHSCX(hscx, IPAC_MODEB, 0x84);
WriteHSCX(hscx, IPAC_CCR1, 0x85);
WriteHSCX(hscx, IPAC_MASKB, 0xFF); /* ints off */
test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_RAW:
WriteHSCX(hscx, IPAC_MODEB, 0xe4); /* ex trans */
WriteHSCX(hscx, IPAC_CCR1, 0x85);
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPAC_MASKB, 0);
test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags);
break;
case ISDN_P_B_HDLC:
WriteHSCX(hscx, IPAC_MODEB, 0x8c);
WriteHSCX(hscx, IPAC_CCR1, 0x8d);
hscx_cmdr(hscx, 0x41);
WriteHSCX(hscx, IPAC_MASKB, 0);
test_and_set_bit(FLG_HDLC, &hscx->bch.Flags);
break;
default:
pr_info("%s: protocol not known %x\n", hscx->ip->name,
bprotocol);
return -ENOPROTOOPT;
}
} else
return -EINVAL;
hscx->bch.state = bprotocol;
return 0;
}
static int
hscx_l2l1(struct mISDNchannel *ch, struct sk_buff *skb)
{
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct hscx_hw *hx = container_of(bch, struct hscx_hw, bch);
int ret = -EINVAL;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
unsigned long flags;
switch (hh->prim) {
case PH_DATA_REQ:
spin_lock_irqsave(hx->ip->hwlock, flags);
ret = bchannel_senddata(bch, skb);
if (ret > 0) { /* direct TX */
ret = 0;
hscx_fill_fifo(hx);
}
spin_unlock_irqrestore(hx->ip->hwlock, flags);
return ret;
case PH_ACTIVATE_REQ:
spin_lock_irqsave(hx->ip->hwlock, flags);
if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
ret = hscx_mode(hx, ch->protocol);
else
ret = 0;
spin_unlock_irqrestore(hx->ip->hwlock, flags);
if (!ret)
_queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
NULL, GFP_KERNEL);
break;
case PH_DEACTIVATE_REQ:
spin_lock_irqsave(hx->ip->hwlock, flags);
mISDN_clear_bchannel(bch);
hscx_mode(hx, ISDN_P_NONE);
spin_unlock_irqrestore(hx->ip->hwlock, flags);
_queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
NULL, GFP_KERNEL);
ret = 0;
break;
default:
pr_info("%s: %s unknown prim(%x,%x)\n",
hx->ip->name, __func__, hh->prim, hh->id);
ret = -EINVAL;
}
if (!ret)
dev_kfree_skb(skb);
return ret;
}
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
return mISDN_ctrl_bchannel(bch, cq);
}
static int
hscx_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
{
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct hscx_hw *hx = container_of(bch, struct hscx_hw, bch);
int ret = -EINVAL;
u_long flags;
pr_debug("%s: %s cmd:%x %p\n", hx->ip->name, __func__, cmd, arg);
switch (cmd) {
case CLOSE_CHANNEL:
test_and_clear_bit(FLG_OPEN, &bch->Flags);
cancel_work_sync(&bch->workq);
spin_lock_irqsave(hx->ip->hwlock, flags);
mISDN_clear_bchannel(bch);
hscx_mode(hx, ISDN_P_NONE);
spin_unlock_irqrestore(hx->ip->hwlock, flags);
ch->protocol = ISDN_P_NONE;
ch->peer = NULL;
module_put(hx->ip->owner);
ret = 0;
break;
case CONTROL_CHANNEL:
ret = channel_bctrl(bch, arg);
break;
default:
pr_info("%s: %s unknown prim(%x)\n",
hx->ip->name, __func__, cmd);
}
return ret;
}
static void
free_ipac(struct ipac_hw *ipac)
{
isac_release(&ipac->isac);
}
static const char *HSCXVer[] =
{"A1", "?1", "A2", "?3", "A3", "V2.1", "?6", "?7",
"?8", "?9", "?10", "?11", "?12", "?13", "?14", "???"};
static void
hscx_init(struct hscx_hw *hx)
{
u8 val;
WriteHSCX(hx, IPAC_RAH2, 0xFF);
WriteHSCX(hx, IPAC_XBCH, 0x00);
WriteHSCX(hx, IPAC_RLCR, 0x00);
if (hx->ip->type & IPAC_TYPE_HSCX) {
WriteHSCX(hx, IPAC_CCR1, 0x85);
val = ReadHSCX(hx, HSCX_VSTR);
pr_debug("%s: HSCX VSTR %02x\n", hx->ip->name, val);
if (hx->bch.debug & DEBUG_HW)
pr_notice("%s: HSCX version %s\n", hx->ip->name,
HSCXVer[val & 0x0f]);
} else
WriteHSCX(hx, IPAC_CCR1, 0x82);
WriteHSCX(hx, IPAC_CCR2, 0x30);
WriteHSCX(hx, IPAC_XCCR, 0x07);
WriteHSCX(hx, IPAC_RCCR, 0x07);
}
static int
ipac_init(struct ipac_hw *ipac)
{
u8 val;
if (ipac->type & IPAC_TYPE_HSCX) {
hscx_init(&ipac->hscx[0]);
hscx_init(&ipac->hscx[1]);
val = ReadIPAC(ipac, IPAC_ID);
} else if (ipac->type & IPAC_TYPE_IPAC) {
hscx_init(&ipac->hscx[0]);
hscx_init(&ipac->hscx[1]);
WriteIPAC(ipac, IPAC_MASK, IPAC__ON);
val = ReadIPAC(ipac, IPAC_CONF);
/* conf is default 0, but can be overwritten by card setup */
pr_debug("%s: IPAC CONF %02x/%02x\n", ipac->name,
val, ipac->conf);
WriteIPAC(ipac, IPAC_CONF, ipac->conf);
val = ReadIPAC(ipac, IPAC_ID);
if (ipac->hscx[0].bch.debug & DEBUG_HW)
pr_notice("%s: IPAC Design ID %02x\n", ipac->name, val);
}
/* nothing special for IPACX to do here */
return isac_init(&ipac->isac);
}
static int
open_bchannel(struct ipac_hw *ipac, struct channel_req *rq)
{
struct bchannel *bch;
if (rq->adr.channel == 0 || rq->adr.channel > 2)
return -EINVAL;
if (rq->protocol == ISDN_P_NONE)
return -EINVAL;
bch = &ipac->hscx[rq->adr.channel - 1].bch;
if (test_and_set_bit(FLG_OPEN, &bch->Flags))
return -EBUSY; /* b-channel can be only open once */
test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags);
bch->ch.protocol = rq->protocol;
rq->ch = &bch->ch;
return 0;
}
static int
channel_ctrl(struct ipac_hw *ipac, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_L1_TIMER3;
break;
case MISDN_CTRL_LOOP:
/* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */
if (cq->channel < 0 || cq->channel > 3) {
ret = -EINVAL;
break;
}
ret = ipac->ctrl(ipac, HW_TESTLOOP, cq->channel);
break;
case MISDN_CTRL_L1_TIMER3:
ret = ipac->isac.ctrl(&ipac->isac, HW_TIMER3_VALUE, cq->p1);
break;
default:
pr_info("%s: unknown CTRL OP %x\n", ipac->name, cq->op);
ret = -EINVAL;
break;
}
return ret;
}
static int
ipac_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
{
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
struct dchannel *dch = container_of(dev, struct dchannel, dev);
struct isac_hw *isac = container_of(dch, struct isac_hw, dch);
struct ipac_hw *ipac = container_of(isac, struct ipac_hw, isac);
struct channel_req *rq;
int err = 0;
pr_debug("%s: DCTRL: %x %p\n", ipac->name, cmd, arg);
switch (cmd) {
case OPEN_CHANNEL:
rq = arg;
if (rq->protocol == ISDN_P_TE_S0)
err = open_dchannel_caller(isac, rq, __builtin_return_address(0));
else
err = open_bchannel(ipac, rq);
if (err)
break;
if (!try_module_get(ipac->owner))
pr_info("%s: cannot get module\n", ipac->name);
break;
case CLOSE_CHANNEL:
pr_debug("%s: dev(%d) close from %p\n", ipac->name,
dch->dev.id, __builtin_return_address(0));
module_put(ipac->owner);
break;
case CONTROL_CHANNEL:
err = channel_ctrl(ipac, arg);
break;
default:
pr_debug("%s: unknown DCTRL command %x\n", ipac->name, cmd);
return -EINVAL;
}
return err;
}
u32
mISDNipac_init(struct ipac_hw *ipac, void *hw)
{
u32 ret;
u8 i;
ipac->hw = hw;
if (ipac->isac.dch.debug & DEBUG_HW)
pr_notice("%s: ipac type %x\n", ipac->name, ipac->type);
if (ipac->type & IPAC_TYPE_HSCX) {
ipac->isac.type = IPAC_TYPE_ISAC;
ipac->hscx[0].off = 0;
ipac->hscx[1].off = 0x40;
ipac->hscx[0].fifo_size = 32;
ipac->hscx[1].fifo_size = 32;
} else if (ipac->type & IPAC_TYPE_IPAC) {
ipac->isac.type = IPAC_TYPE_IPAC | IPAC_TYPE_ISAC;
ipac->hscx[0].off = 0;
ipac->hscx[1].off = 0x40;
ipac->hscx[0].fifo_size = 64;
ipac->hscx[1].fifo_size = 64;
} else if (ipac->type & IPAC_TYPE_IPACX) {
ipac->isac.type = IPAC_TYPE_IPACX | IPAC_TYPE_ISACX;
ipac->hscx[0].off = IPACX_OFF_ICA;
ipac->hscx[1].off = IPACX_OFF_ICB;
ipac->hscx[0].fifo_size = 64;
ipac->hscx[1].fifo_size = 64;
} else
return 0;
mISDNisac_init(&ipac->isac, hw);
ipac->isac.dch.dev.D.ctrl = ipac_dctrl;
for (i = 0; i < 2; i++) {
ipac->hscx[i].bch.nr = i + 1;
set_channelmap(i + 1, ipac->isac.dch.dev.channelmap);
list_add(&ipac->hscx[i].bch.ch.list,
&ipac->isac.dch.dev.bchannels);
mISDN_initbchannel(&ipac->hscx[i].bch, MAX_DATA_MEM,
ipac->hscx[i].fifo_size);
ipac->hscx[i].bch.ch.nr = i + 1;
ipac->hscx[i].bch.ch.send = &hscx_l2l1;
ipac->hscx[i].bch.ch.ctrl = hscx_bctrl;
ipac->hscx[i].bch.hw = hw;
ipac->hscx[i].ip = ipac;
/* default values for IOM time slots
* can be overwritten by card */
ipac->hscx[i].slot = (i == 0) ? 0x2f : 0x03;
}
ipac->init = ipac_init;
ipac->release = free_ipac;
ret = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
(1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
return ret;
}
EXPORT_SYMBOL(mISDNipac_init);
static int __init
isac_mod_init(void)
{
pr_notice("mISDNipac module version %s\n", ISAC_REV);
return 0;
}
static void __exit
isac_mod_cleanup(void)
{
pr_notice("mISDNipac module unloaded\n");
}
module_init(isac_mod_init);
module_exit(isac_mod_cleanup);