diff options
Diffstat (limited to 'drivers/isdn/hardware/mISDN/mISDNipac.c')
| -rw-r--r-- | drivers/isdn/hardware/mISDN/mISDNipac.c | 1653 |
1 files changed, 1653 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/mISDN/mISDNipac.c b/drivers/isdn/hardware/mISDN/mISDNipac.c new file mode 100644 index 000000000..a77eea594 --- /dev/null +++ b/drivers/isdn/hardware/mISDN/mISDNipac.c @@ -0,0 +1,1653 @@ +/* + * isac.c ISAC specific routines + * + * Author Karsten Keil <keil@isdn4linux.de> + * + * Copyright 2009 by Karsten Keil <keil@isdn4linux.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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. + * + */ + +#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: + 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); +} + +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); + } + init_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); + if (isac->dch.rx_skb) + 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 { + if (isac->dch.tx_skb) + 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) + ret = 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) + ret = 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) + ret = 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) + ret = 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); + if (isac->dch.rx_skb) + 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_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 + 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 isac_hw *isac) +{ + 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; + isac->dch.timer.function = (void *) dbusy_timer_handler; + isac->dch.timer.data = (long)isac; + init_timer(&isac->dch.timer); + 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_warning("%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 { + if (hx->bch.tx_skb) + 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 to 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; + cnt--; + } + } + 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 overwriten 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); |