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authorArnd Bergmann <arnd@arndb.de>2019-04-18 22:47:35 +0200
committerArnd Bergmann <arnd@arndb.de>2019-05-31 11:12:45 +0200
commit85993b8c9786fb24975dbcabebb1c75790d4fb6a (patch)
tree48b6d667c6258b44a4915acbd403f17c1b1c9cf5 /drivers/isdn/hisax/ipacx.c
parent8e6c8aa3b52e573a6db1f58b2ba9a9106a012963 (diff)
isdn: remove hisax driver
With the decline of ISDN, this seems to have become almost completely obsolete, and even in the past years before that, almost all remaining users appear to have used mISDN instead. Birger Harzenetter noted that he is still using i4l/hisax to take advantage of the 'divert' driver for call diversion, but otherwise uses mISDN on the same hardware. This is a rare edge case as far as I can tell, but we are still breaking an actively used work flow (see https://xkcd.com/1172/). We debated moving i4l/hisax to staging as an intermediate step, but as he is not likely to change the setup, and that would just delay breaking this use case. The alternatives here are to stay on stable kernels < 5.2, to create an external driver repository for isdn4linux, or to add divert functionality to mISDN. Cc: Birger Harzenetter <WIMPy@yeti.dk> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/isdn/hisax/ipacx.c')
-rw-r--r--drivers/isdn/hisax/ipacx.c913
1 files changed, 0 insertions, 913 deletions
diff --git a/drivers/isdn/hisax/ipacx.c b/drivers/isdn/hisax/ipacx.c
deleted file mode 100644
index c7086c1534bd..000000000000
--- a/drivers/isdn/hisax/ipacx.c
+++ /dev/null
@@ -1,913 +0,0 @@
-/*
- *
- * IPACX specific routines
- *
- * Author Joerg Petersohn
- * Derived from hisax_isac.c, isac.c, hscx.c and others
- *
- * This software may be used and distributed according to the terms
- * of the GNU General Public License, incorporated herein by reference.
- *
- */
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include "hisax_if.h"
-#include "hisax.h"
-#include "isdnl1.h"
-#include "ipacx.h"
-
-#define DBUSY_TIMER_VALUE 80
-#define TIMER3_VALUE 7000
-#define MAX_DFRAME_LEN_L1 300
-#define B_FIFO_SIZE 64
-#define D_FIFO_SIZE 32
-
-
-// ipacx interrupt mask values
-#define _MASK_IMASK 0x2E // global mask
-#define _MASKB_IMASK 0x0B
-#define _MASKD_IMASK 0x03 // all on
-
-//----------------------------------------------------------
-// local function declarations
-//----------------------------------------------------------
-static void ph_command(struct IsdnCardState *cs, unsigned int command);
-static inline void cic_int(struct IsdnCardState *cs);
-static void dch_l2l1(struct PStack *st, int pr, void *arg);
-static void dbusy_timer_handler(struct timer_list *t);
-static void dch_empty_fifo(struct IsdnCardState *cs, int count);
-static void dch_fill_fifo(struct IsdnCardState *cs);
-static inline void dch_int(struct IsdnCardState *cs);
-static void dch_setstack(struct PStack *st, struct IsdnCardState *cs);
-static void dch_init(struct IsdnCardState *cs);
-static void bch_l2l1(struct PStack *st, int pr, void *arg);
-static void bch_empty_fifo(struct BCState *bcs, int count);
-static void bch_fill_fifo(struct BCState *bcs);
-static void bch_int(struct IsdnCardState *cs, u_char hscx);
-static void bch_mode(struct BCState *bcs, int mode, int bc);
-static void bch_close_state(struct BCState *bcs);
-static int bch_open_state(struct IsdnCardState *cs, struct BCState *bcs);
-static int bch_setstack(struct PStack *st, struct BCState *bcs);
-static void bch_init(struct IsdnCardState *cs, int hscx);
-static void clear_pending_ints(struct IsdnCardState *cs);
-
-//----------------------------------------------------------
-// Issue Layer 1 command to chip
-//----------------------------------------------------------
-static void
-ph_command(struct IsdnCardState *cs, unsigned int command)
-{
- if (cs->debug & L1_DEB_ISAC)
- debugl1(cs, "ph_command (%#x) in (%#x)", command,
- cs->dc.isac.ph_state);
-//###################################
-// printk(KERN_INFO "ph_command (%#x)\n", command);
-//###################################
- cs->writeisac(cs, IPACX_CIX0, (command << 4) | 0x0E);
-}
-
-//----------------------------------------------------------
-// Transceiver interrupt handler
-//----------------------------------------------------------
-static inline void
-cic_int(struct IsdnCardState *cs)
-{
- u_char event;
-
- event = cs->readisac(cs, IPACX_CIR0) >> 4;
- if (cs->debug & L1_DEB_ISAC) debugl1(cs, "cic_int(event=%#x)", event);
-//#########################################
-// printk(KERN_INFO "cic_int(%x)\n", event);
-//#########################################
- cs->dc.isac.ph_state = event;
- schedule_event(cs, D_L1STATECHANGE);
-}
-
-//==========================================================
-// D channel functions
-//==========================================================
-
-//----------------------------------------------------------
-// Command entry point
-//----------------------------------------------------------
-static void
-dch_l2l1(struct PStack *st, int pr, void *arg)
-{
- struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
- struct sk_buff *skb = arg;
- u_char cda1_cr;
-
- switch (pr) {
- case (PH_DATA | REQUEST):
- if (cs->debug & DEB_DLOG_HEX) LogFrame(cs, skb->data, skb->len);
- if (cs->debug & DEB_DLOG_VERBOSE) dlogframe(cs, skb, 0);
- if (cs->tx_skb) {
- skb_queue_tail(&cs->sq, skb);
-#ifdef L2FRAME_DEBUG
- if (cs->debug & L1_DEB_LAPD) Logl2Frame(cs, skb, "PH_DATA Queued", 0);
-#endif
- } else {
- cs->tx_skb = skb;
- cs->tx_cnt = 0;
-#ifdef L2FRAME_DEBUG
- if (cs->debug & L1_DEB_LAPD) Logl2Frame(cs, skb, "PH_DATA", 0);
-#endif
- dch_fill_fifo(cs);
- }
- break;
-
- case (PH_PULL | INDICATION):
- if (cs->tx_skb) {
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
- skb_queue_tail(&cs->sq, skb);
- break;
- }
- if (cs->debug & DEB_DLOG_HEX) LogFrame(cs, skb->data, skb->len);
- if (cs->debug & DEB_DLOG_VERBOSE) dlogframe(cs, skb, 0);
- cs->tx_skb = skb;
- cs->tx_cnt = 0;
-#ifdef L2FRAME_DEBUG
- if (cs->debug & L1_DEB_LAPD) Logl2Frame(cs, skb, "PH_DATA_PULLED", 0);
-#endif
- dch_fill_fifo(cs);
- break;
-
- case (PH_PULL | REQUEST):
-#ifdef L2FRAME_DEBUG
- if (cs->debug & L1_DEB_LAPD) debugl1(cs, "-> PH_REQUEST_PULL");
-#endif
- if (!cs->tx_skb) {
- clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
- st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
- } else
- set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
- break;
-
- case (HW_RESET | REQUEST):
- case (HW_ENABLE | REQUEST):
- if ((cs->dc.isac.ph_state == IPACX_IND_RES) ||
- (cs->dc.isac.ph_state == IPACX_IND_DR) ||
- (cs->dc.isac.ph_state == IPACX_IND_DC))
- ph_command(cs, IPACX_CMD_TIM);
- else
- ph_command(cs, IPACX_CMD_RES);
- break;
-
- case (HW_INFO3 | REQUEST):
- ph_command(cs, IPACX_CMD_AR8);
- break;
-
- case (HW_TESTLOOP | REQUEST):
- cs->writeisac(cs, IPACX_CDA_TSDP10, 0x80); // Timeslot 0 is B1
- cs->writeisac(cs, IPACX_CDA_TSDP11, 0x81); // Timeslot 0 is B1
- cda1_cr = cs->readisac(cs, IPACX_CDA1_CR);
- (void) cs->readisac(cs, IPACX_CDA2_CR);
- if ((long)arg & 1) { // loop B1
- cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr | 0x0a);
- }
- else { // B1 off
- cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr & ~0x0a);
- }
- if ((long)arg & 2) { // loop B2
- cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr | 0x14);
- }
- else { // B2 off
- cs->writeisac(cs, IPACX_CDA1_CR, cda1_cr & ~0x14);
- }
- break;
-
- case (HW_DEACTIVATE | RESPONSE):
- skb_queue_purge(&cs->rq);
- skb_queue_purge(&cs->sq);
- if (cs->tx_skb) {
- dev_kfree_skb_any(cs->tx_skb);
- cs->tx_skb = NULL;
- }
- if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
- del_timer(&cs->dbusytimer);
- break;
-
- default:
- if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_l2l1 unknown %04x", pr);
- break;
- }
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-dbusy_timer_handler(struct timer_list *t)
-{
- struct IsdnCardState *cs = from_timer(cs, t, dbusytimer);
- struct PStack *st;
- int rbchd, stard;
-
- if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
- rbchd = cs->readisac(cs, IPACX_RBCHD);
- stard = cs->readisac(cs, IPACX_STARD);
- if (cs->debug)
- debugl1(cs, "D-Channel Busy RBCHD %02x STARD %02x", rbchd, stard);
- if (!(stard & 0x40)) { // D-Channel Busy
- set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
- for (st = cs->stlist; st; st = st->next) {
- st->l1.l1l2(st, PH_PAUSE | INDICATION, NULL); // flow control on
- }
- } else {
- // seems we lost an interrupt; reset transceiver */
- clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
- if (cs->tx_skb) {
- dev_kfree_skb_any(cs->tx_skb);
- cs->tx_cnt = 0;
- cs->tx_skb = NULL;
- } else {
- printk(KERN_WARNING "HiSax: ISAC D-Channel Busy no skb\n");
- debugl1(cs, "D-Channel Busy no skb");
- }
- cs->writeisac(cs, IPACX_CMDRD, 0x01); // Tx reset, generates XPR
- }
- }
-}
-
-//----------------------------------------------------------
-// Fill buffer from receive FIFO
-//----------------------------------------------------------
-static void
-dch_empty_fifo(struct IsdnCardState *cs, int count)
-{
- u_char *ptr;
-
- if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
- debugl1(cs, "dch_empty_fifo()");
-
- // message too large, remove
- if ((cs->rcvidx + count) >= MAX_DFRAME_LEN_L1) {
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "dch_empty_fifo() incoming message too large");
- cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC
- cs->rcvidx = 0;
- return;
- }
-
- ptr = cs->rcvbuf + cs->rcvidx;
- cs->rcvidx += count;
-
- cs->readisacfifo(cs, ptr, count);
- cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC
-
- if (cs->debug & L1_DEB_ISAC_FIFO) {
- char *t = cs->dlog;
-
- t += sprintf(t, "dch_empty_fifo() cnt %d", count);
- QuickHex(t, ptr, count);
- debugl1(cs, "%s", cs->dlog);
- }
-}
-
-//----------------------------------------------------------
-// Fill transmit FIFO
-//----------------------------------------------------------
-static void
-dch_fill_fifo(struct IsdnCardState *cs)
-{
- int count;
- u_char cmd, *ptr;
-
- if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
- debugl1(cs, "dch_fill_fifo()");
-
- if (!cs->tx_skb) return;
- count = cs->tx_skb->len;
- if (count <= 0) return;
-
- if (count > D_FIFO_SIZE) {
- count = D_FIFO_SIZE;
- cmd = 0x08; // XTF
- } else {
- cmd = 0x0A; // XTF | XME
- }
-
- ptr = cs->tx_skb->data;
- skb_pull(cs->tx_skb, count);
- cs->tx_cnt += count;
- cs->writeisacfifo(cs, ptr, count);
- cs->writeisac(cs, IPACX_CMDRD, cmd);
-
- // set timeout for transmission contol
- if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
- debugl1(cs, "dch_fill_fifo dbusytimer running");
- del_timer(&cs->dbusytimer);
- }
- cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000);
- add_timer(&cs->dbusytimer);
-
- if (cs->debug & L1_DEB_ISAC_FIFO) {
- char *t = cs->dlog;
-
- t += sprintf(t, "dch_fill_fifo() cnt %d", count);
- QuickHex(t, ptr, count);
- debugl1(cs, "%s", cs->dlog);
- }
-}
-
-//----------------------------------------------------------
-// D channel interrupt handler
-//----------------------------------------------------------
-static inline void
-dch_int(struct IsdnCardState *cs)
-{
- struct sk_buff *skb;
- u_char istad, rstad;
- int count;
-
- istad = cs->readisac(cs, IPACX_ISTAD);
-//##############################################
-// printk(KERN_WARNING "dch_int(istad=%02x)\n", istad);
-//##############################################
-
- if (istad & 0x80) { // RME
- rstad = cs->readisac(cs, IPACX_RSTAD);
- if ((rstad & 0xf0) != 0xa0) { // !(VFR && !RDO && CRC && !RAB)
- if (!(rstad & 0x80))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "dch_int(): invalid frame");
- if ((rstad & 0x40))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "dch_int(): RDO");
- if (!(rstad & 0x20))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "dch_int(): CRC error");
- cs->writeisac(cs, IPACX_CMDRD, 0x80); // RMC
- } else { // received frame ok
- count = cs->readisac(cs, IPACX_RBCLD);
- if (count) count--; // RSTAB is last byte
- count &= D_FIFO_SIZE - 1;
- if (count == 0) count = D_FIFO_SIZE;
- dch_empty_fifo(cs, count);
- if ((count = cs->rcvidx) > 0) {
- cs->rcvidx = 0;
- if (!(skb = dev_alloc_skb(count)))
- printk(KERN_WARNING "HiSax dch_int(): receive out of memory\n");
- else {
- skb_put_data(skb, cs->rcvbuf, count);
- skb_queue_tail(&cs->rq, skb);
- }
- }
- }
- cs->rcvidx = 0;
- schedule_event(cs, D_RCVBUFREADY);
- }
-
- if (istad & 0x40) { // RPF
- dch_empty_fifo(cs, D_FIFO_SIZE);
- }
-
- if (istad & 0x20) { // RFO
- if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_int(): RFO");
- cs->writeisac(cs, IPACX_CMDRD, 0x40); //RRES
- }
-
- if (istad & 0x10) { // XPR
- if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
- del_timer(&cs->dbusytimer);
- if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
- schedule_event(cs, D_CLEARBUSY);
- if (cs->tx_skb) {
- if (cs->tx_skb->len) {
- dch_fill_fifo(cs);
- goto afterXPR;
- }
- else {
- dev_kfree_skb_irq(cs->tx_skb);
- cs->tx_skb = NULL;
- cs->tx_cnt = 0;
- }
- }
- if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
- cs->tx_cnt = 0;
- dch_fill_fifo(cs);
- }
- else {
- schedule_event(cs, D_XMTBUFREADY);
- }
- }
-afterXPR:
-
- if (istad & 0x0C) { // XDU or XMR
- if (cs->debug & L1_DEB_WARN) debugl1(cs, "dch_int(): XDU");
- if (cs->tx_skb) {
- skb_push(cs->tx_skb, cs->tx_cnt); // retransmit
- cs->tx_cnt = 0;
- dch_fill_fifo(cs);
- } else {
- printk(KERN_WARNING "HiSax: ISAC XDU no skb\n");
- debugl1(cs, "ISAC XDU no skb");
- }
- }
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-dch_setstack(struct PStack *st, struct IsdnCardState *cs)
-{
- st->l1.l1hw = dch_l2l1;
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-dch_init(struct IsdnCardState *cs)
-{
- printk(KERN_INFO "HiSax: IPACX ISDN driver v0.1.0\n");
-
- cs->setstack_d = dch_setstack;
-
- timer_setup(&cs->dbusytimer, dbusy_timer_handler, 0);
-
- cs->writeisac(cs, IPACX_TR_CONF0, 0x00); // clear LDD
- cs->writeisac(cs, IPACX_TR_CONF2, 0x00); // enable transmitter
- cs->writeisac(cs, IPACX_MODED, 0xC9); // transparent mode 0, RAC, stop/go
- cs->writeisac(cs, IPACX_MON_CR, 0x00); // disable monitor channel
-}
-
-
-//==========================================================
-// B channel functions
-//==========================================================
-
-//----------------------------------------------------------
-// Entry point for commands
-//----------------------------------------------------------
-static void
-bch_l2l1(struct PStack *st, int pr, void *arg)
-{
- struct BCState *bcs = st->l1.bcs;
- struct sk_buff *skb = arg;
- u_long flags;
-
- switch (pr) {
- case (PH_DATA | REQUEST):
- spin_lock_irqsave(&bcs->cs->lock, flags);
- if (bcs->tx_skb) {
- skb_queue_tail(&bcs->squeue, skb);
- } else {
- bcs->tx_skb = skb;
- set_bit(BC_FLG_BUSY, &bcs->Flag);
- bcs->hw.hscx.count = 0;
- bch_fill_fifo(bcs);
- }
- spin_unlock_irqrestore(&bcs->cs->lock, flags);
- break;
- case (PH_PULL | INDICATION):
- spin_lock_irqsave(&bcs->cs->lock, flags);
- if (bcs->tx_skb) {
- printk(KERN_WARNING "HiSax bch_l2l1(): this shouldn't happen\n");
- } else {
- set_bit(BC_FLG_BUSY, &bcs->Flag);
- bcs->tx_skb = skb;
- bcs->hw.hscx.count = 0;
- bch_fill_fifo(bcs);
- }
- spin_unlock_irqrestore(&bcs->cs->lock, flags);
- break;
- case (PH_PULL | REQUEST):
- if (!bcs->tx_skb) {
- clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
- st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
- } else
- set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
- break;
- case (PH_ACTIVATE | REQUEST):
- spin_lock_irqsave(&bcs->cs->lock, flags);
- set_bit(BC_FLG_ACTIV, &bcs->Flag);
- bch_mode(bcs, st->l1.mode, st->l1.bc);
- spin_unlock_irqrestore(&bcs->cs->lock, flags);
- l1_msg_b(st, pr, arg);
- break;
- case (PH_DEACTIVATE | REQUEST):
- l1_msg_b(st, pr, arg);
- break;
- case (PH_DEACTIVATE | CONFIRM):
- spin_lock_irqsave(&bcs->cs->lock, flags);
- clear_bit(BC_FLG_ACTIV, &bcs->Flag);
- clear_bit(BC_FLG_BUSY, &bcs->Flag);
- bch_mode(bcs, 0, st->l1.bc);
- spin_unlock_irqrestore(&bcs->cs->lock, flags);
- st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
- break;
- }
-}
-
-//----------------------------------------------------------
-// Read B channel fifo to receive buffer
-//----------------------------------------------------------
-static void
-bch_empty_fifo(struct BCState *bcs, int count)
-{
- u_char *ptr, hscx;
- struct IsdnCardState *cs;
- int cnt;
-
- cs = bcs->cs;
- hscx = bcs->hw.hscx.hscx;
- if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
- debugl1(cs, "bch_empty_fifo()");
-
- // message too large, remove
- if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) {
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_empty_fifo() incoming packet too large");
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC
- bcs->hw.hscx.rcvidx = 0;
- return;
- }
-
- ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx;
- cnt = count;
- while (cnt--) *ptr++ = cs->BC_Read_Reg(cs, hscx, IPACX_RFIFOB);
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC
-
- ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx;
- bcs->hw.hscx.rcvidx += count;
-
- if (cs->debug & L1_DEB_HSCX_FIFO) {
- char *t = bcs->blog;
-
- t += sprintf(t, "bch_empty_fifo() B-%d cnt %d", hscx, count);
- QuickHex(t, ptr, count);
- debugl1(cs, "%s", bcs->blog);
- }
-}
-
-//----------------------------------------------------------
-// Fill buffer to transmit FIFO
-//----------------------------------------------------------
-static void
-bch_fill_fifo(struct BCState *bcs)
-{
- struct IsdnCardState *cs;
- int more, count, cnt;
- u_char *ptr, *p, hscx;
-
- cs = bcs->cs;
- if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO))
- debugl1(cs, "bch_fill_fifo()");
-
- if (!bcs->tx_skb) return;
- if (bcs->tx_skb->len <= 0) return;
-
- hscx = bcs->hw.hscx.hscx;
- more = (bcs->mode == L1_MODE_TRANS) ? 1 : 0;
- if (bcs->tx_skb->len > B_FIFO_SIZE) {
- more = 1;
- count = B_FIFO_SIZE;
- } else {
- count = bcs->tx_skb->len;
- }
- cnt = count;
-
- p = ptr = bcs->tx_skb->data;
- skb_pull(bcs->tx_skb, count);
- bcs->tx_cnt -= count;
- bcs->hw.hscx.count += count;
- while (cnt--) cs->BC_Write_Reg(cs, hscx, IPACX_XFIFOB, *p++);
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, (more ? 0x08 : 0x0a));
-
- if (cs->debug & L1_DEB_HSCX_FIFO) {
- char *t = bcs->blog;
-
- t += sprintf(t, "%s() B-%d cnt %d", __func__, hscx, count);
- QuickHex(t, ptr, count);
- debugl1(cs, "%s", bcs->blog);
- }
-}
-
-//----------------------------------------------------------
-// B channel interrupt handler
-//----------------------------------------------------------
-static void
-bch_int(struct IsdnCardState *cs, u_char hscx)
-{
- u_char istab;
- struct BCState *bcs;
- struct sk_buff *skb;
- int count;
- u_char rstab;
-
- bcs = cs->bcs + hscx;
- istab = cs->BC_Read_Reg(cs, hscx, IPACX_ISTAB);
-//##############################################
-// printk(KERN_WARNING "bch_int(istab=%02x)\n", istab);
-//##############################################
- if (!test_bit(BC_FLG_INIT, &bcs->Flag)) return;
-
- if (istab & 0x80) { // RME
- rstab = cs->BC_Read_Reg(cs, hscx, IPACX_RSTAB);
- if ((rstab & 0xf0) != 0xa0) { // !(VFR && !RDO && CRC && !RAB)
- if (!(rstab & 0x80))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_int() B-%d: invalid frame", hscx);
- if ((rstab & 0x40) && (bcs->mode != L1_MODE_NULL))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_int() B-%d: RDO mode=%d", hscx, bcs->mode);
- if (!(rstab & 0x20))
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_int() B-%d: CRC error", hscx);
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x80); // RMC
- }
- else { // received frame ok
- count = cs->BC_Read_Reg(cs, hscx, IPACX_RBCLB) & (B_FIFO_SIZE - 1);
- if (count == 0) count = B_FIFO_SIZE;
- bch_empty_fifo(bcs, count);
- if ((count = bcs->hw.hscx.rcvidx - 1) > 0) {
- if (cs->debug & L1_DEB_HSCX_FIFO)
- debugl1(cs, "bch_int Frame %d", count);
- if (!(skb = dev_alloc_skb(count)))
- printk(KERN_WARNING "HiSax bch_int(): receive frame out of memory\n");
- else {
- skb_put_data(skb, bcs->hw.hscx.rcvbuf,
- count);
- skb_queue_tail(&bcs->rqueue, skb);
- }
- }
- }
- bcs->hw.hscx.rcvidx = 0;
- schedule_event(bcs, B_RCVBUFREADY);
- }
-
- if (istab & 0x40) { // RPF
- bch_empty_fifo(bcs, B_FIFO_SIZE);
-
- if (bcs->mode == L1_MODE_TRANS) { // queue every chunk
- // receive transparent audio data
- if (!(skb = dev_alloc_skb(B_FIFO_SIZE)))
- printk(KERN_WARNING "HiSax bch_int(): receive transparent out of memory\n");
- else {
- skb_put_data(skb, bcs->hw.hscx.rcvbuf,
- B_FIFO_SIZE);
- skb_queue_tail(&bcs->rqueue, skb);
- }
- bcs->hw.hscx.rcvidx = 0;
- schedule_event(bcs, B_RCVBUFREADY);
- }
- }
-
- if (istab & 0x20) { // RFO
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_int() B-%d: RFO error", hscx);
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x40); // RRES
- }
-
- if (istab & 0x10) { // XPR
- if (bcs->tx_skb) {
- if (bcs->tx_skb->len) {
- bch_fill_fifo(bcs);
- goto afterXPR;
- } else {
- if (test_bit(FLG_LLI_L1WAKEUP, &bcs->st->lli.flag) &&
- (PACKET_NOACK != bcs->tx_skb->pkt_type)) {
- u_long flags;
- spin_lock_irqsave(&bcs->aclock, flags);
- bcs->ackcnt += bcs->hw.hscx.count;
- spin_unlock_irqrestore(&bcs->aclock, flags);
- schedule_event(bcs, B_ACKPENDING);
- }
- }
- dev_kfree_skb_irq(bcs->tx_skb);
- bcs->hw.hscx.count = 0;
- bcs->tx_skb = NULL;
- }
- if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
- bcs->hw.hscx.count = 0;
- set_bit(BC_FLG_BUSY, &bcs->Flag);
- bch_fill_fifo(bcs);
- } else {
- clear_bit(BC_FLG_BUSY, &bcs->Flag);
- schedule_event(bcs, B_XMTBUFREADY);
- }
- }
-afterXPR:
-
- if (istab & 0x04) { // XDU
- if (bcs->mode == L1_MODE_TRANS) {
- bch_fill_fifo(bcs);
- }
- else {
- if (bcs->tx_skb) { // restart transmitting the whole frame
- skb_push(bcs->tx_skb, bcs->hw.hscx.count);
- bcs->tx_cnt += bcs->hw.hscx.count;
- bcs->hw.hscx.count = 0;
- }
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x01); // XRES
- if (cs->debug & L1_DEB_WARN)
- debugl1(cs, "bch_int() B-%d XDU error", hscx);
- }
- }
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-bch_mode(struct BCState *bcs, int mode, int bc)
-{
- struct IsdnCardState *cs = bcs->cs;
- int hscx = bcs->hw.hscx.hscx;
-
- bc = bc ? 1 : 0; // in case bc is greater than 1
- if (cs->debug & L1_DEB_HSCX)
- debugl1(cs, "mode_bch() switch B-%d mode %d chan %d", hscx, mode, bc);
- bcs->mode = mode;
- bcs->channel = bc;
-
- // map controller to according timeslot
- if (!hscx)
- {
- cs->writeisac(cs, IPACX_BCHA_TSDP_BC1, 0x80 | bc);
- cs->writeisac(cs, IPACX_BCHA_CR, 0x88);
- }
- else
- {
- cs->writeisac(cs, IPACX_BCHB_TSDP_BC1, 0x80 | bc);
- cs->writeisac(cs, IPACX_BCHB_CR, 0x88);
- }
-
- switch (mode) {
- case (L1_MODE_NULL):
- cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0xC0); // rec off
- cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x30); // std adj.
- cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, 0xFF); // ints off
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments
- break;
- case (L1_MODE_TRANS):
- cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0x88); // ext transp mode
- cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x00); // xxx00000
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments
- cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, _MASKB_IMASK);
- break;
- case (L1_MODE_HDLC):
- cs->BC_Write_Reg(cs, hscx, IPACX_MODEB, 0xC8); // transp mode 0
- cs->BC_Write_Reg(cs, hscx, IPACX_EXMB, 0x01); // idle=hdlc flags crc enabled
- cs->BC_Write_Reg(cs, hscx, IPACX_CMDRB, 0x41); // validate adjustments
- cs->BC_Write_Reg(cs, hscx, IPACX_MASKB, _MASKB_IMASK);
- break;
- }
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-bch_close_state(struct BCState *bcs)
-{
- bch_mode(bcs, 0, bcs->channel);
- if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
- kfree(bcs->hw.hscx.rcvbuf);
- bcs->hw.hscx.rcvbuf = NULL;
- kfree(bcs->blog);
- bcs->blog = NULL;
- skb_queue_purge(&bcs->rqueue);
- skb_queue_purge(&bcs->squeue);
- if (bcs->tx_skb) {
- dev_kfree_skb_any(bcs->tx_skb);
- bcs->tx_skb = NULL;
- clear_bit(BC_FLG_BUSY, &bcs->Flag);
- }
- }
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static int
-bch_open_state(struct IsdnCardState *cs, struct BCState *bcs)
-{
- if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
- if (!(bcs->hw.hscx.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
- printk(KERN_WARNING
- "HiSax open_bchstate(): No memory for hscx.rcvbuf\n");
- clear_bit(BC_FLG_INIT, &bcs->Flag);
- return (1);
- }
- if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
- printk(KERN_WARNING
- "HiSax open_bchstate: No memory for bcs->blog\n");
- clear_bit(BC_FLG_INIT, &bcs->Flag);
- kfree(bcs->hw.hscx.rcvbuf);
- bcs->hw.hscx.rcvbuf = NULL;
- return (2);
- }
- skb_queue_head_init(&bcs->rqueue);
- skb_queue_head_init(&bcs->squeue);
- }
- bcs->tx_skb = NULL;
- clear_bit(BC_FLG_BUSY, &bcs->Flag);
- bcs->event = 0;
- bcs->hw.hscx.rcvidx = 0;
- bcs->tx_cnt = 0;
- return (0);
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static int
-bch_setstack(struct PStack *st, struct BCState *bcs)
-{
- bcs->channel = st->l1.bc;
- if (bch_open_state(st->l1.hardware, bcs)) return (-1);
- st->l1.bcs = bcs;
- st->l2.l2l1 = bch_l2l1;
- setstack_manager(st);
- bcs->st = st;
- setstack_l1_B(st);
- return (0);
-}
-
-//----------------------------------------------------------
-//----------------------------------------------------------
-static void
-bch_init(struct IsdnCardState *cs, int hscx)
-{
- cs->bcs[hscx].BC_SetStack = bch_setstack;
- cs->bcs[hscx].BC_Close = bch_close_state;
- cs->bcs[hscx].hw.hscx.hscx = hscx;
- cs->bcs[hscx].cs = cs;
- bch_mode(cs->bcs + hscx, 0, hscx);
-}
-
-
-//==========================================================
-// Shared functions
-//==========================================================
-
-//----------------------------------------------------------
-// Main interrupt handler
-//----------------------------------------------------------
-void
-interrupt_ipacx(struct IsdnCardState *cs)
-{
- u_char ista;
-
- while ((ista = cs->readisac(cs, IPACX_ISTA))) {
-//#################################################
-// printk(KERN_WARNING "interrupt_ipacx(ista=%02x)\n", ista);
-//#################################################
- if (ista & 0x80) bch_int(cs, 0); // B channel interrupts
- if (ista & 0x40) bch_int(cs, 1);
-
- if (ista & 0x01) dch_int(cs); // D channel
- if (ista & 0x10) cic_int(cs); // Layer 1 state
- }
-}
-
-//----------------------------------------------------------
-// Clears chip interrupt status
-//----------------------------------------------------------
-static void
-clear_pending_ints(struct IsdnCardState *cs)
-{
- int ista;
-
- // all interrupts off
- cs->writeisac(cs, IPACX_MASK, 0xff);
- cs->writeisac(cs, IPACX_MASKD, 0xff);
- cs->BC_Write_Reg(cs, 0, IPACX_MASKB, 0xff);
- cs->BC_Write_Reg(cs, 1, IPACX_MASKB, 0xff);
-
- ista = cs->readisac(cs, IPACX_ISTA);
- if (ista & 0x80) cs->BC_Read_Reg(cs, 0, IPACX_ISTAB);
- if (ista & 0x40) cs->BC_Read_Reg(cs, 1, IPACX_ISTAB);
- if (ista & 0x10) cs->readisac(cs, IPACX_CIR0);
- if (ista & 0x01) cs->readisac(cs, IPACX_ISTAD);
-}
-
-//----------------------------------------------------------
-// Does chip configuration work
-// Work to do depends on bit mask in part
-//----------------------------------------------------------
-void
-init_ipacx(struct IsdnCardState *cs, int part)
-{
- if (part & 1) { // initialise chip
-//##################################################
-// printk(KERN_INFO "init_ipacx(%x)\n", part);
-//##################################################
- clear_pending_ints(cs);
- bch_init(cs, 0);
- bch_init(cs, 1);
- dch_init(cs);
- }
- if (part & 2) { // reenable all interrupts and start chip
- cs->BC_Write_Reg(cs, 0, IPACX_MASKB, _MASKB_IMASK);
- cs->BC_Write_Reg(cs, 1, IPACX_MASKB, _MASKB_IMASK);
- cs->writeisac(cs, IPACX_MASKD, _MASKD_IMASK);
- cs->writeisac(cs, IPACX_MASK, _MASK_IMASK); // global mask register
-
- // reset HDLC Transmitters/receivers
- cs->writeisac(cs, IPACX_CMDRD, 0x41);
- cs->BC_Write_Reg(cs, 0, IPACX_CMDRB, 0x41);
- cs->BC_Write_Reg(cs, 1, IPACX_CMDRB, 0x41);
- ph_command(cs, IPACX_CMD_RES);
- }
-}
-
-//----------------- end of file -----------------------