diff options
Diffstat (limited to 'drivers/isdn/hardware/mISDN/mISDNisar.c')
| -rw-r--r-- | drivers/isdn/hardware/mISDN/mISDNisar.c | 1693 |
1 files changed, 1693 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/mISDN/mISDNisar.c b/drivers/isdn/hardware/mISDN/mISDNisar.c new file mode 100644 index 000000000..56943409b --- /dev/null +++ b/drivers/isdn/hardware/mISDN/mISDNisar.c @@ -0,0 +1,1693 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * mISDNisar.c ISAR (Siemens PSB 7110) specific functions + * + * Author Karsten Keil (keil@isdn4linux.de) + * + * Copyright 2009 by Karsten Keil <keil@isdn4linux.de> + */ + +/* define this to enable static debug messages, if you kernel supports + * dynamic debugging, you should use debugfs for this + */ +/* #define DEBUG */ + +#include <linux/gfp.h> +#include <linux/delay.h> +#include <linux/vmalloc.h> +#include <linux/mISDNhw.h> +#include <linux/module.h> +#include "isar.h" + +#define ISAR_REV "2.1" + +MODULE_AUTHOR("Karsten Keil"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION(ISAR_REV); + +#define DEBUG_HW_FIRMWARE_FIFO 0x10000 + +static const u8 faxmodulation[] = {3, 24, 48, 72, 73, 74, 96, 97, 98, 121, + 122, 145, 146}; +#define FAXMODCNT 13 + +static void isar_setup(struct isar_hw *); + +static inline int +waitforHIA(struct isar_hw *isar, int timeout) +{ + int t = timeout; + u8 val = isar->read_reg(isar->hw, ISAR_HIA); + + while ((val & 1) && t) { + udelay(1); + t--; + val = isar->read_reg(isar->hw, ISAR_HIA); + } + pr_debug("%s: HIA after %dus\n", isar->name, timeout - t); + return timeout; +} + +/* + * send msg to ISAR mailbox + * if msg is NULL use isar->buf + */ +static int +send_mbox(struct isar_hw *isar, u8 his, u8 creg, u8 len, u8 *msg) +{ + if (!waitforHIA(isar, 1000)) + return 0; + pr_debug("send_mbox(%02x,%02x,%d)\n", his, creg, len); + isar->write_reg(isar->hw, ISAR_CTRL_H, creg); + isar->write_reg(isar->hw, ISAR_CTRL_L, len); + isar->write_reg(isar->hw, ISAR_WADR, 0); + if (!msg) + msg = isar->buf; + if (msg && len) { + isar->write_fifo(isar->hw, ISAR_MBOX, msg, len); + if (isar->ch[0].bch.debug & DEBUG_HW_BFIFO) { + int l = 0; + + while (l < (int)len) { + hex_dump_to_buffer(msg + l, len - l, 32, 1, + isar->log, 256, 1); + pr_debug("%s: %s %02x: %s\n", isar->name, + __func__, l, isar->log); + l += 32; + } + } + } + isar->write_reg(isar->hw, ISAR_HIS, his); + waitforHIA(isar, 1000); + return 1; +} + +/* + * receive message from ISAR mailbox + * if msg is NULL use isar->buf + */ +static void +rcv_mbox(struct isar_hw *isar, u8 *msg) +{ + if (!msg) + msg = isar->buf; + isar->write_reg(isar->hw, ISAR_RADR, 0); + if (msg && isar->clsb) { + isar->read_fifo(isar->hw, ISAR_MBOX, msg, isar->clsb); + if (isar->ch[0].bch.debug & DEBUG_HW_BFIFO) { + int l = 0; + + while (l < (int)isar->clsb) { + hex_dump_to_buffer(msg + l, isar->clsb - l, 32, + 1, isar->log, 256, 1); + pr_debug("%s: %s %02x: %s\n", isar->name, + __func__, l, isar->log); + l += 32; + } + } + } + isar->write_reg(isar->hw, ISAR_IIA, 0); +} + +static inline void +get_irq_infos(struct isar_hw *isar) +{ + isar->iis = isar->read_reg(isar->hw, ISAR_IIS); + isar->cmsb = isar->read_reg(isar->hw, ISAR_CTRL_H); + isar->clsb = isar->read_reg(isar->hw, ISAR_CTRL_L); + pr_debug("%s: rcv_mbox(%02x,%02x,%d)\n", isar->name, + isar->iis, isar->cmsb, isar->clsb); +} + +/* + * poll answer message from ISAR mailbox + * should be used only with ISAR IRQs disabled before DSP was started + * + */ +static int +poll_mbox(struct isar_hw *isar, int maxdelay) +{ + int t = maxdelay; + u8 irq; + + irq = isar->read_reg(isar->hw, ISAR_IRQBIT); + while (t && !(irq & ISAR_IRQSTA)) { + udelay(1); + t--; + } + if (t) { + get_irq_infos(isar); + rcv_mbox(isar, NULL); + } + pr_debug("%s: pulled %d bytes after %d us\n", + isar->name, isar->clsb, maxdelay - t); + return t; +} + +static int +ISARVersion(struct isar_hw *isar) +{ + int ver; + + /* disable ISAR IRQ */ + isar->write_reg(isar->hw, ISAR_IRQBIT, 0); + isar->buf[0] = ISAR_MSG_HWVER; + isar->buf[1] = 0; + isar->buf[2] = 1; + if (!send_mbox(isar, ISAR_HIS_VNR, 0, 3, NULL)) + return -1; + if (!poll_mbox(isar, 1000)) + return -2; + if (isar->iis == ISAR_IIS_VNR) { + if (isar->clsb == 1) { + ver = isar->buf[0] & 0xf; + return ver; + } + return -3; + } + return -4; +} + +static int +load_firmware(struct isar_hw *isar, const u8 *buf, int size) +{ + u32 saved_debug = isar->ch[0].bch.debug; + int ret, cnt; + u8 nom, noc; + u16 left, val, *sp = (u16 *)buf; + u8 *mp; + u_long flags; + + struct { + u16 sadr; + u16 len; + u16 d_key; + } blk_head; + + if (1 != isar->version) { + pr_err("%s: ISAR wrong version %d firmware download aborted\n", + isar->name, isar->version); + return -EINVAL; + } + if (!(saved_debug & DEBUG_HW_FIRMWARE_FIFO)) + isar->ch[0].bch.debug &= ~DEBUG_HW_BFIFO; + pr_debug("%s: load firmware %d words (%d bytes)\n", + isar->name, size / 2, size); + cnt = 0; + size /= 2; + /* disable ISAR IRQ */ + spin_lock_irqsave(isar->hwlock, flags); + isar->write_reg(isar->hw, ISAR_IRQBIT, 0); + spin_unlock_irqrestore(isar->hwlock, flags); + while (cnt < size) { + blk_head.sadr = le16_to_cpu(*sp++); + blk_head.len = le16_to_cpu(*sp++); + blk_head.d_key = le16_to_cpu(*sp++); + cnt += 3; + pr_debug("ISAR firmware block (%#x,%d,%#x)\n", + blk_head.sadr, blk_head.len, blk_head.d_key & 0xff); + left = blk_head.len; + if (cnt + left > size) { + pr_info("%s: firmware error have %d need %d words\n", + isar->name, size, cnt + left); + ret = -EINVAL; + goto reterrflg; + } + spin_lock_irqsave(isar->hwlock, flags); + if (!send_mbox(isar, ISAR_HIS_DKEY, blk_head.d_key & 0xff, + 0, NULL)) { + pr_info("ISAR send_mbox dkey failed\n"); + ret = -ETIME; + goto reterror; + } + if (!poll_mbox(isar, 1000)) { + pr_warn("ISAR poll_mbox dkey failed\n"); + ret = -ETIME; + goto reterror; + } + spin_unlock_irqrestore(isar->hwlock, flags); + if ((isar->iis != ISAR_IIS_DKEY) || isar->cmsb || isar->clsb) { + pr_info("ISAR wrong dkey response (%x,%x,%x)\n", + isar->iis, isar->cmsb, isar->clsb); + ret = 1; + goto reterrflg; + } + while (left > 0) { + if (left > 126) + noc = 126; + else + noc = left; + nom = (2 * noc) + 3; + mp = isar->buf; + /* the ISAR is big endian */ + *mp++ = blk_head.sadr >> 8; + *mp++ = blk_head.sadr & 0xFF; + left -= noc; + cnt += noc; + *mp++ = noc; + pr_debug("%s: load %3d words at %04x\n", isar->name, + noc, blk_head.sadr); + blk_head.sadr += noc; + while (noc) { + val = le16_to_cpu(*sp++); + *mp++ = val >> 8; + *mp++ = val & 0xFF; + noc--; + } + spin_lock_irqsave(isar->hwlock, flags); + if (!send_mbox(isar, ISAR_HIS_FIRM, 0, nom, NULL)) { + pr_info("ISAR send_mbox prog failed\n"); + ret = -ETIME; + goto reterror; + } + if (!poll_mbox(isar, 1000)) { + pr_info("ISAR poll_mbox prog failed\n"); + ret = -ETIME; + goto reterror; + } + spin_unlock_irqrestore(isar->hwlock, flags); + if ((isar->iis != ISAR_IIS_FIRM) || + isar->cmsb || isar->clsb) { + pr_info("ISAR wrong prog response (%x,%x,%x)\n", + isar->iis, isar->cmsb, isar->clsb); + ret = -EIO; + goto reterrflg; + } + } + pr_debug("%s: ISAR firmware block %d words loaded\n", + isar->name, blk_head.len); + } + isar->ch[0].bch.debug = saved_debug; + /* 10ms delay */ + cnt = 10; + while (cnt--) + mdelay(1); + isar->buf[0] = 0xff; + isar->buf[1] = 0xfe; + isar->bstat = 0; + spin_lock_irqsave(isar->hwlock, flags); + if (!send_mbox(isar, ISAR_HIS_STDSP, 0, 2, NULL)) { + pr_info("ISAR send_mbox start dsp failed\n"); + ret = -ETIME; + goto reterror; + } + if (!poll_mbox(isar, 1000)) { + pr_info("ISAR poll_mbox start dsp failed\n"); + ret = -ETIME; + goto reterror; + } + if ((isar->iis != ISAR_IIS_STDSP) || isar->cmsb || isar->clsb) { + pr_info("ISAR wrong start dsp response (%x,%x,%x)\n", + isar->iis, isar->cmsb, isar->clsb); + ret = -EIO; + goto reterror; + } else + pr_debug("%s: ISAR start dsp success\n", isar->name); + + /* NORMAL mode entered */ + /* Enable IRQs of ISAR */ + isar->write_reg(isar->hw, ISAR_IRQBIT, ISAR_IRQSTA); + spin_unlock_irqrestore(isar->hwlock, flags); + cnt = 1000; /* max 1s */ + while ((!isar->bstat) && cnt) { + mdelay(1); + cnt--; + } + if (!cnt) { + pr_info("ISAR no general status event received\n"); + ret = -ETIME; + goto reterrflg; + } else + pr_debug("%s: ISAR general status event %x\n", + isar->name, isar->bstat); + /* 10ms delay */ + cnt = 10; + while (cnt--) + mdelay(1); + isar->iis = 0; + spin_lock_irqsave(isar->hwlock, flags); + if (!send_mbox(isar, ISAR_HIS_DIAG, ISAR_CTRL_STST, 0, NULL)) { + pr_info("ISAR send_mbox self tst failed\n"); + ret = -ETIME; + goto reterror; + } + spin_unlock_irqrestore(isar->hwlock, flags); + cnt = 10000; /* max 100 ms */ + while ((isar->iis != ISAR_IIS_DIAG) && cnt) { + udelay(10); + cnt--; + } + mdelay(1); + if (!cnt) { + pr_info("ISAR no self tst response\n"); + ret = -ETIME; + goto reterrflg; + } + if ((isar->cmsb == ISAR_CTRL_STST) && (isar->clsb == 1) + && (isar->buf[0] == 0)) + pr_debug("%s: ISAR selftest OK\n", isar->name); + else { + pr_info("ISAR selftest not OK %x/%x/%x\n", + isar->cmsb, isar->clsb, isar->buf[0]); + ret = -EIO; + goto reterrflg; + } + spin_lock_irqsave(isar->hwlock, flags); + isar->iis = 0; + if (!send_mbox(isar, ISAR_HIS_DIAG, ISAR_CTRL_SWVER, 0, NULL)) { + pr_info("ISAR RQST SVN failed\n"); + ret = -ETIME; + goto reterror; + } + spin_unlock_irqrestore(isar->hwlock, flags); + cnt = 30000; /* max 300 ms */ + while ((isar->iis != ISAR_IIS_DIAG) && cnt) { + udelay(10); + cnt--; + } + mdelay(1); + if (!cnt) { + pr_info("ISAR no SVN response\n"); + ret = -ETIME; + goto reterrflg; + } else { + if ((isar->cmsb == ISAR_CTRL_SWVER) && (isar->clsb == 1)) { + pr_notice("%s: ISAR software version %#x\n", + isar->name, isar->buf[0]); + } else { + pr_info("%s: ISAR wrong swver response (%x,%x)" + " cnt(%d)\n", isar->name, isar->cmsb, + isar->clsb, cnt); + ret = -EIO; + goto reterrflg; + } + } + spin_lock_irqsave(isar->hwlock, flags); + isar_setup(isar); + spin_unlock_irqrestore(isar->hwlock, flags); + ret = 0; +reterrflg: + spin_lock_irqsave(isar->hwlock, flags); +reterror: + isar->ch[0].bch.debug = saved_debug; + if (ret) + /* disable ISAR IRQ */ + isar->write_reg(isar->hw, ISAR_IRQBIT, 0); + spin_unlock_irqrestore(isar->hwlock, flags); + return ret; +} + +static inline void +deliver_status(struct isar_ch *ch, int status) +{ + pr_debug("%s: HL->LL FAXIND %x\n", ch->is->name, status); + _queue_data(&ch->bch.ch, PH_CONTROL_IND, status, 0, NULL, GFP_ATOMIC); +} + +static inline void +isar_rcv_frame(struct isar_ch *ch) +{ + u8 *ptr; + int maxlen; + + if (!ch->is->clsb) { + pr_debug("%s; ISAR zero len frame\n", ch->is->name); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + return; + } + if (test_bit(FLG_RX_OFF, &ch->bch.Flags)) { + ch->bch.dropcnt += ch->is->clsb; + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + return; + } + switch (ch->bch.state) { + case ISDN_P_NONE: + pr_debug("%s: ISAR protocol 0 spurious IIS_RDATA %x/%x/%x\n", + ch->is->name, ch->is->iis, ch->is->cmsb, ch->is->clsb); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + case ISDN_P_B_RAW: + case ISDN_P_B_L2DTMF: + case ISDN_P_B_MODEM_ASYNC: + maxlen = bchannel_get_rxbuf(&ch->bch, ch->is->clsb); + if (maxlen < 0) { + pr_warn("%s.B%d: No bufferspace for %d bytes\n", + ch->is->name, ch->bch.nr, ch->is->clsb); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } + rcv_mbox(ch->is, skb_put(ch->bch.rx_skb, ch->is->clsb)); + recv_Bchannel(&ch->bch, 0, false); + break; + case ISDN_P_B_HDLC: + maxlen = bchannel_get_rxbuf(&ch->bch, ch->is->clsb); + if (maxlen < 0) { + pr_warn("%s.B%d: No bufferspace for %d bytes\n", + ch->is->name, ch->bch.nr, ch->is->clsb); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } + if (ch->is->cmsb & HDLC_ERROR) { + pr_debug("%s: ISAR frame error %x len %d\n", + ch->is->name, ch->is->cmsb, ch->is->clsb); +#ifdef ERROR_STATISTIC + if (ch->is->cmsb & HDLC_ERR_RER) + ch->bch.err_inv++; + if (ch->is->cmsb & HDLC_ERR_CER) + ch->bch.err_crc++; +#endif + skb_trim(ch->bch.rx_skb, 0); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } + if (ch->is->cmsb & HDLC_FSD) + skb_trim(ch->bch.rx_skb, 0); + ptr = skb_put(ch->bch.rx_skb, ch->is->clsb); + rcv_mbox(ch->is, ptr); + if (ch->is->cmsb & HDLC_FED) { + if (ch->bch.rx_skb->len < 3) { /* last 2 are the FCS */ + pr_debug("%s: ISAR frame to short %d\n", + ch->is->name, ch->bch.rx_skb->len); + skb_trim(ch->bch.rx_skb, 0); + break; + } + skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2); + recv_Bchannel(&ch->bch, 0, false); + } + break; + case ISDN_P_B_T30_FAX: + if (ch->state != STFAX_ACTIV) { + pr_debug("%s: isar_rcv_frame: not ACTIV\n", + ch->is->name); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + if (ch->bch.rx_skb) + skb_trim(ch->bch.rx_skb, 0); + break; + } + if (!ch->bch.rx_skb) { + ch->bch.rx_skb = mI_alloc_skb(ch->bch.maxlen, + GFP_ATOMIC); + if (unlikely(!ch->bch.rx_skb)) { + pr_info("%s: B receive out of memory\n", + __func__); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } + } + if (ch->cmd == PCTRL_CMD_FRM) { + rcv_mbox(ch->is, skb_put(ch->bch.rx_skb, ch->is->clsb)); + pr_debug("%s: isar_rcv_frame: %d\n", + ch->is->name, ch->bch.rx_skb->len); + if (ch->is->cmsb & SART_NMD) { /* ABORT */ + pr_debug("%s: isar_rcv_frame: no more data\n", + ch->is->name); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + send_mbox(ch->is, SET_DPS(ch->dpath) | + ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC, + 0, NULL); + ch->state = STFAX_ESCAPE; + /* set_skb_flag(skb, DF_NOMOREDATA); */ + } + recv_Bchannel(&ch->bch, 0, false); + if (ch->is->cmsb & SART_NMD) + deliver_status(ch, HW_MOD_NOCARR); + break; + } + if (ch->cmd != PCTRL_CMD_FRH) { + pr_debug("%s: isar_rcv_frame: unknown fax mode %x\n", + ch->is->name, ch->cmd); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + if (ch->bch.rx_skb) + skb_trim(ch->bch.rx_skb, 0); + break; + } + /* PCTRL_CMD_FRH */ + if ((ch->bch.rx_skb->len + ch->is->clsb) > + (ch->bch.maxlen + 2)) { + pr_info("%s: %s incoming packet too large\n", + ch->is->name, __func__); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + skb_trim(ch->bch.rx_skb, 0); + break; + } else if (ch->is->cmsb & HDLC_ERROR) { + pr_info("%s: ISAR frame error %x len %d\n", + ch->is->name, ch->is->cmsb, ch->is->clsb); + skb_trim(ch->bch.rx_skb, 0); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } + if (ch->is->cmsb & HDLC_FSD) + skb_trim(ch->bch.rx_skb, 0); + ptr = skb_put(ch->bch.rx_skb, ch->is->clsb); + rcv_mbox(ch->is, ptr); + if (ch->is->cmsb & HDLC_FED) { + if (ch->bch.rx_skb->len < 3) { /* last 2 are the FCS */ + pr_info("%s: ISAR frame to short %d\n", + ch->is->name, ch->bch.rx_skb->len); + skb_trim(ch->bch.rx_skb, 0); + break; + } + skb_trim(ch->bch.rx_skb, ch->bch.rx_skb->len - 2); + recv_Bchannel(&ch->bch, 0, false); + } + if (ch->is->cmsb & SART_NMD) { /* ABORT */ + pr_debug("%s: isar_rcv_frame: no more data\n", + ch->is->name); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + if (ch->bch.rx_skb) + skb_trim(ch->bch.rx_skb, 0); + send_mbox(ch->is, SET_DPS(ch->dpath) | + ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC, 0, NULL); + ch->state = STFAX_ESCAPE; + deliver_status(ch, HW_MOD_NOCARR); + } + break; + default: + pr_info("isar_rcv_frame protocol (%x)error\n", ch->bch.state); + ch->is->write_reg(ch->is->hw, ISAR_IIA, 0); + break; + } +} + +static void +isar_fill_fifo(struct isar_ch *ch) +{ + int count; + u8 msb; + u8 *ptr; + + pr_debug("%s: ch%d tx_skb %d tx_idx %d\n", ch->is->name, ch->bch.nr, + ch->bch.tx_skb ? ch->bch.tx_skb->len : -1, ch->bch.tx_idx); + if (!(ch->is->bstat & + (ch->dpath == 1 ? BSTAT_RDM1 : BSTAT_RDM2))) + return; + if (!ch->bch.tx_skb) { + if (!test_bit(FLG_TX_EMPTY, &ch->bch.Flags) || + (ch->bch.state != ISDN_P_B_RAW)) + return; + count = ch->mml; + /* use the card buffer */ + memset(ch->is->buf, ch->bch.fill[0], count); + send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA, + 0, count, ch->is->buf); + return; + } + count = ch->bch.tx_skb->len - ch->bch.tx_idx; + if (count <= 0) + return; + if (count > ch->mml) { + msb = 0; + count = ch->mml; + } else { + msb = HDLC_FED; + } + ptr = ch->bch.tx_skb->data + ch->bch.tx_idx; + if (!ch->bch.tx_idx) { + pr_debug("%s: frame start\n", ch->is->name); + if ((ch->bch.state == ISDN_P_B_T30_FAX) && + (ch->cmd == PCTRL_CMD_FTH)) { + if (count > 1) { + if ((ptr[0] == 0xff) && (ptr[1] == 0x13)) { + /* last frame */ + test_and_set_bit(FLG_LASTDATA, + &ch->bch.Flags); + pr_debug("%s: set LASTDATA\n", + ch->is->name); + if (msb == HDLC_FED) + test_and_set_bit(FLG_DLEETX, + &ch->bch.Flags); + } + } + } + msb |= HDLC_FST; + } + ch->bch.tx_idx += count; + switch (ch->bch.state) { + case ISDN_P_NONE: + pr_info("%s: wrong protocol 0\n", __func__); + break; + case ISDN_P_B_RAW: + case ISDN_P_B_L2DTMF: + case ISDN_P_B_MODEM_ASYNC: + send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA, + 0, count, ptr); + break; + case ISDN_P_B_HDLC: + send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA, + msb, count, ptr); + break; + case ISDN_P_B_T30_FAX: + if (ch->state != STFAX_ACTIV) + pr_debug("%s: not ACTIV\n", ch->is->name); + else if (ch->cmd == PCTRL_CMD_FTH) + send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA, + msb, count, ptr); + else if (ch->cmd == PCTRL_CMD_FTM) + send_mbox(ch->is, SET_DPS(ch->dpath) | ISAR_HIS_SDATA, + 0, count, ptr); + else + pr_debug("%s: not FTH/FTM\n", ch->is->name); + break; + default: + pr_info("%s: protocol(%x) error\n", + __func__, ch->bch.state); + break; + } +} + +static inline struct isar_ch * +sel_bch_isar(struct isar_hw *isar, u8 dpath) +{ + struct isar_ch *base = &isar->ch[0]; + + if ((!dpath) || (dpath > 2)) + return NULL; + if (base->dpath == dpath) + return base; + base++; + if (base->dpath == dpath) + return base; + return NULL; +} + +static void +send_next(struct isar_ch *ch) +{ + pr_debug("%s: %s ch%d tx_skb %d tx_idx %d\n", ch->is->name, __func__, + ch->bch.nr, ch->bch.tx_skb ? ch->bch.tx_skb->len : -1, + ch->bch.tx_idx); + if (ch->bch.state == ISDN_P_B_T30_FAX) { + if (ch->cmd == PCTRL_CMD_FTH) { + if (test_bit(FLG_LASTDATA, &ch->bch.Flags)) { + pr_debug("set NMD_DATA\n"); + test_and_set_bit(FLG_NMD_DATA, &ch->bch.Flags); + } + } else if (ch->cmd == PCTRL_CMD_FTM) { + if (test_bit(FLG_DLEETX, &ch->bch.Flags)) { + test_and_set_bit(FLG_LASTDATA, &ch->bch.Flags); + test_and_set_bit(FLG_NMD_DATA, &ch->bch.Flags); + } + } + } + dev_kfree_skb(ch->bch.tx_skb); + if (get_next_bframe(&ch->bch)) { + isar_fill_fifo(ch); + test_and_clear_bit(FLG_TX_EMPTY, &ch->bch.Flags); + } else if (test_bit(FLG_TX_EMPTY, &ch->bch.Flags)) { + isar_fill_fifo(ch); + } else { + if (test_and_clear_bit(FLG_DLEETX, &ch->bch.Flags)) { + if (test_and_clear_bit(FLG_LASTDATA, + &ch->bch.Flags)) { + if (test_and_clear_bit(FLG_NMD_DATA, + &ch->bch.Flags)) { + u8 zd = 0; + send_mbox(ch->is, SET_DPS(ch->dpath) | + ISAR_HIS_SDATA, 0x01, 1, &zd); + } + test_and_set_bit(FLG_LL_OK, &ch->bch.Flags); + } else { + deliver_status(ch, HW_MOD_CONNECT); + } + } else if (test_bit(FLG_FILLEMPTY, &ch->bch.Flags)) { + test_and_set_bit(FLG_TX_EMPTY, &ch->bch.Flags); + } + } +} + +static void +check_send(struct isar_hw *isar, u8 rdm) +{ + struct isar_ch *ch; + + pr_debug("%s: rdm %x\n", isar->name, rdm); + if (rdm & BSTAT_RDM1) { + ch = sel_bch_isar(isar, 1); + if (ch && test_bit(FLG_ACTIVE, &ch->bch.Flags)) { + if (ch->bch.tx_skb && (ch->bch.tx_skb->len > + ch->bch.tx_idx)) + isar_fill_fifo(ch); + else + send_next(ch); + } + } + if (rdm & BSTAT_RDM2) { + ch = sel_bch_isar(isar, 2); + if (ch && test_bit(FLG_ACTIVE, &ch->bch.Flags)) { + if (ch->bch.tx_skb && (ch->bch.tx_skb->len > + ch->bch.tx_idx)) + isar_fill_fifo(ch); + else + send_next(ch); + } + } +} + +static const char *dmril[] = {"NO SPEED", "1200/75", "NODEF2", "75/1200", "NODEF4", + "300", "600", "1200", "2400", "4800", "7200", + "9600nt", "9600t", "12000", "14400", "WRONG"}; +static const char *dmrim[] = {"NO MOD", "NO DEF", "V32/V32b", "V22", "V21", + "Bell103", "V23", "Bell202", "V17", "V29", "V27ter"}; + +static void +isar_pump_status_rsp(struct isar_ch *ch) { + u8 ril = ch->is->buf[0]; + u8 rim; + + if (!test_and_clear_bit(ISAR_RATE_REQ, &ch->is->Flags)) + return; + if (ril > 14) { + pr_info("%s: wrong pstrsp ril=%d\n", ch->is->name, ril); + ril = 15; + } + switch (ch->is->buf[1]) { + case 0: + rim = 0; + break; + case 0x20: + rim = 2; + break; + case 0x40: + rim = 3; + break; + case 0x41: + rim = 4; + break; + case 0x51: + rim = 5; + break; + case 0x61: + rim = 6; + break; + case 0x71: + rim = 7; + break; + case 0x82: + rim = 8; + break; + case 0x92: + rim = 9; + break; + case 0xa2: + rim = 10; + break; + default: + rim = 1; + break; + } + sprintf(ch->conmsg, "%s %s", dmril[ril], dmrim[rim]); + pr_debug("%s: pump strsp %s\n", ch->is->name, ch->conmsg); +} + +static void +isar_pump_statev_modem(struct isar_ch *ch, u8 devt) { + u8 dps = SET_DPS(ch->dpath); + + switch (devt) { + case PSEV_10MS_TIMER: + pr_debug("%s: pump stev TIMER\n", ch->is->name); + break; + case PSEV_CON_ON: + pr_debug("%s: pump stev CONNECT\n", ch->is->name); + deliver_status(ch, HW_MOD_CONNECT); + break; + case PSEV_CON_OFF: + pr_debug("%s: pump stev NO CONNECT\n", ch->is->name); + send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL); + deliver_status(ch, HW_MOD_NOCARR); + break; + case PSEV_V24_OFF: + pr_debug("%s: pump stev V24 OFF\n", ch->is->name); + break; + case PSEV_CTS_ON: + pr_debug("%s: pump stev CTS ON\n", ch->is->name); + break; + case PSEV_CTS_OFF: + pr_debug("%s pump stev CTS OFF\n", ch->is->name); + break; + case PSEV_DCD_ON: + pr_debug("%s: pump stev CARRIER ON\n", ch->is->name); + test_and_set_bit(ISAR_RATE_REQ, &ch->is->Flags); + send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL); + break; + case PSEV_DCD_OFF: + pr_debug("%s: pump stev CARRIER OFF\n", ch->is->name); + break; + case PSEV_DSR_ON: + pr_debug("%s: pump stev DSR ON\n", ch->is->name); + break; + case PSEV_DSR_OFF: + pr_debug("%s: pump stev DSR_OFF\n", ch->is->name); + break; + case PSEV_REM_RET: + pr_debug("%s: pump stev REMOTE RETRAIN\n", ch->is->name); + break; + case PSEV_REM_REN: + pr_debug("%s: pump stev REMOTE RENEGOTIATE\n", ch->is->name); + break; + case PSEV_GSTN_CLR: + pr_debug("%s: pump stev GSTN CLEAR\n", ch->is->name); + break; + default: + pr_info("u%s: unknown pump stev %x\n", ch->is->name, devt); + break; + } +} + +static void +isar_pump_statev_fax(struct isar_ch *ch, u8 devt) { + u8 dps = SET_DPS(ch->dpath); + u8 p1; + + switch (devt) { + case PSEV_10MS_TIMER: + pr_debug("%s: pump stev TIMER\n", ch->is->name); + break; + case PSEV_RSP_READY: + pr_debug("%s: pump stev RSP_READY\n", ch->is->name); + ch->state = STFAX_READY; + deliver_status(ch, HW_MOD_READY); +#ifdef AUTOCON + if (test_bit(BC_FLG_ORIG, &ch->bch.Flags)) + isar_pump_cmd(bch, HW_MOD_FRH, 3); + else + isar_pump_cmd(bch, HW_MOD_FTH, 3); +#endif + break; + case PSEV_LINE_TX_H: + if (ch->state == STFAX_LINE) { + pr_debug("%s: pump stev LINE_TX_H\n", ch->is->name); + ch->state = STFAX_CONT; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + PCTRL_CMD_CONT, 0, NULL); + } else { + pr_debug("%s: pump stev LINE_TX_H wrong st %x\n", + ch->is->name, ch->state); + } + break; + case PSEV_LINE_RX_H: + if (ch->state == STFAX_LINE) { + pr_debug("%s: pump stev LINE_RX_H\n", ch->is->name); + ch->state = STFAX_CONT; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + PCTRL_CMD_CONT, 0, NULL); + } else { + pr_debug("%s: pump stev LINE_RX_H wrong st %x\n", + ch->is->name, ch->state); + } + break; + case PSEV_LINE_TX_B: + if (ch->state == STFAX_LINE) { + pr_debug("%s: pump stev LINE_TX_B\n", ch->is->name); + ch->state = STFAX_CONT; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + PCTRL_CMD_CONT, 0, NULL); + } else { + pr_debug("%s: pump stev LINE_TX_B wrong st %x\n", + ch->is->name, ch->state); + } + break; + case PSEV_LINE_RX_B: + if (ch->state == STFAX_LINE) { + pr_debug("%s: pump stev LINE_RX_B\n", ch->is->name); + ch->state = STFAX_CONT; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + PCTRL_CMD_CONT, 0, NULL); + } else { + pr_debug("%s: pump stev LINE_RX_B wrong st %x\n", + ch->is->name, ch->state); + } + break; + case PSEV_RSP_CONN: + if (ch->state == STFAX_CONT) { + pr_debug("%s: pump stev RSP_CONN\n", ch->is->name); + ch->state = STFAX_ACTIV; + test_and_set_bit(ISAR_RATE_REQ, &ch->is->Flags); + send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL); + if (ch->cmd == PCTRL_CMD_FTH) { + int delay = (ch->mod == 3) ? 1000 : 200; + /* 1s (200 ms) Flags before data */ + if (test_and_set_bit(FLG_FTI_RUN, + &ch->bch.Flags)) + del_timer(&ch->ftimer); + ch->ftimer.expires = + jiffies + ((delay * HZ) / 1000); + test_and_set_bit(FLG_LL_CONN, + &ch->bch.Flags); + add_timer(&ch->ftimer); + } else { + deliver_status(ch, HW_MOD_CONNECT); + } + } else { + pr_debug("%s: pump stev RSP_CONN wrong st %x\n", + ch->is->name, ch->state); + } + break; + case PSEV_FLAGS_DET: + pr_debug("%s: pump stev FLAGS_DET\n", ch->is->name); + break; + case PSEV_RSP_DISC: + pr_debug("%s: pump stev RSP_DISC state(%d)\n", + ch->is->name, ch->state); + if (ch->state == STFAX_ESCAPE) { + p1 = 5; + switch (ch->newcmd) { + case 0: + ch->state = STFAX_READY; + break; + case PCTRL_CMD_FTM: + p1 = 2; + fallthrough; + case PCTRL_CMD_FTH: + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + PCTRL_CMD_SILON, 1, &p1); + ch->state = STFAX_SILDET; + break; + case PCTRL_CMD_FRH: + case PCTRL_CMD_FRM: + ch->mod = ch->newmod; + p1 = ch->newmod; + ch->newmod = 0; + ch->cmd = ch->newcmd; + ch->newcmd = 0; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + ch->cmd, 1, &p1); + ch->state = STFAX_LINE; + ch->try_mod = 3; + break; + default: + pr_debug("%s: RSP_DISC unknown newcmd %x\n", + ch->is->name, ch->newcmd); + break; + } + } else if (ch->state == STFAX_ACTIV) { + if (test_and_clear_bit(FLG_LL_OK, &ch->bch.Flags)) + deliver_status(ch, HW_MOD_OK); + else if (ch->cmd == PCTRL_CMD_FRM) + deliver_status(ch, HW_MOD_NOCARR); + else + deliver_status(ch, HW_MOD_FCERROR); + ch->state = STFAX_READY; + } else if (ch->state != STFAX_SILDET) { + /* ignore in STFAX_SILDET */ + ch->state = STFAX_READY; + deliver_status(ch, HW_MOD_FCERROR); + } + break; + case PSEV_RSP_SILDET: + pr_debug("%s: pump stev RSP_SILDET\n", ch->is->name); + if (ch->state == STFAX_SILDET) { + ch->mod = ch->newmod; + p1 = ch->newmod; + ch->newmod = 0; + ch->cmd = ch->newcmd; + ch->newcmd = 0; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + ch->cmd, 1, &p1); + ch->state = STFAX_LINE; + ch->try_mod = 3; + } + break; + case PSEV_RSP_SILOFF: + pr_debug("%s: pump stev RSP_SILOFF\n", ch->is->name); + break; + case PSEV_RSP_FCERR: + if (ch->state == STFAX_LINE) { + pr_debug("%s: pump stev RSP_FCERR try %d\n", + ch->is->name, ch->try_mod); + if (ch->try_mod--) { + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, + ch->cmd, 1, &ch->mod); + break; + } + } + pr_debug("%s: pump stev RSP_FCERR\n", ch->is->name); + ch->state = STFAX_ESCAPE; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, PCTRL_CMD_ESC, + 0, NULL); + deliver_status(ch, HW_MOD_FCERROR); + break; + default: + break; + } +} + +void +mISDNisar_irq(struct isar_hw *isar) +{ + struct isar_ch *ch; + + get_irq_infos(isar); + switch (isar->iis & ISAR_IIS_MSCMSD) { + case ISAR_IIS_RDATA: + ch = sel_bch_isar(isar, isar->iis >> 6); + if (ch) + isar_rcv_frame(ch); + else { + pr_debug("%s: ISAR spurious IIS_RDATA %x/%x/%x\n", + isar->name, isar->iis, isar->cmsb, + isar->clsb); + isar->write_reg(isar->hw, ISAR_IIA, 0); + } + break; + case ISAR_IIS_GSTEV: + isar->write_reg(isar->hw, ISAR_IIA, 0); + isar->bstat |= isar->cmsb; + check_send(isar, isar->cmsb); + break; + case ISAR_IIS_BSTEV: +#ifdef ERROR_STATISTIC + ch = sel_bch_isar(isar, isar->iis >> 6); + if (ch) { + if (isar->cmsb == BSTEV_TBO) + ch->bch.err_tx++; + if (isar->cmsb == BSTEV_RBO) + ch->bch.err_rdo++; + } +#endif + pr_debug("%s: Buffer STEV dpath%d msb(%x)\n", + isar->name, isar->iis >> 6, isar->cmsb); + isar->write_reg(isar->hw, ISAR_IIA, 0); + break; + case ISAR_IIS_PSTEV: + ch = sel_bch_isar(isar, isar->iis >> 6); + if (ch) { + rcv_mbox(isar, NULL); + if (ch->bch.state == ISDN_P_B_MODEM_ASYNC) + isar_pump_statev_modem(ch, isar->cmsb); + else if (ch->bch.state == ISDN_P_B_T30_FAX) + isar_pump_statev_fax(ch, isar->cmsb); + else if (ch->bch.state == ISDN_P_B_RAW) { + int tt; + tt = isar->cmsb | 0x30; + if (tt == 0x3e) + tt = '*'; + else if (tt == 0x3f) + tt = '#'; + else if (tt > '9') + tt += 7; + tt |= DTMF_TONE_VAL; + _queue_data(&ch->bch.ch, PH_CONTROL_IND, + MISDN_ID_ANY, sizeof(tt), &tt, + GFP_ATOMIC); + } else + pr_debug("%s: ISAR IIS_PSTEV pm %d sta %x\n", + isar->name, ch->bch.state, + isar->cmsb); + } else { + pr_debug("%s: ISAR spurious IIS_PSTEV %x/%x/%x\n", + isar->name, isar->iis, isar->cmsb, + isar->clsb); + isar->write_reg(isar->hw, ISAR_IIA, 0); + } + break; + case ISAR_IIS_PSTRSP: + ch = sel_bch_isar(isar, isar->iis >> 6); + if (ch) { + rcv_mbox(isar, NULL); + isar_pump_status_rsp(ch); + } else { + pr_debug("%s: ISAR spurious IIS_PSTRSP %x/%x/%x\n", + isar->name, isar->iis, isar->cmsb, + isar->clsb); + isar->write_reg(isar->hw, ISAR_IIA, 0); + } + break; + case ISAR_IIS_DIAG: + case ISAR_IIS_BSTRSP: + case ISAR_IIS_IOM2RSP: + rcv_mbox(isar, NULL); + break; + case ISAR_IIS_INVMSG: + rcv_mbox(isar, NULL); + pr_debug("%s: invalid msg his:%x\n", isar->name, isar->cmsb); + break; + default: + rcv_mbox(isar, NULL); + pr_debug("%s: unhandled msg iis(%x) ctrl(%x/%x)\n", + isar->name, isar->iis, isar->cmsb, isar->clsb); + break; + } +} +EXPORT_SYMBOL(mISDNisar_irq); + +static void +ftimer_handler(struct timer_list *t) +{ + struct isar_ch *ch = from_timer(ch, t, ftimer); + + pr_debug("%s: ftimer flags %lx\n", ch->is->name, ch->bch.Flags); + test_and_clear_bit(FLG_FTI_RUN, &ch->bch.Flags); + if (test_and_clear_bit(FLG_LL_CONN, &ch->bch.Flags)) + deliver_status(ch, HW_MOD_CONNECT); +} + +static void +setup_pump(struct isar_ch *ch) { + u8 dps = SET_DPS(ch->dpath); + u8 ctrl, param[6]; + + switch (ch->bch.state) { + case ISDN_P_NONE: + case ISDN_P_B_RAW: + case ISDN_P_B_HDLC: + send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, PMOD_BYPASS, 0, NULL); + break; + case ISDN_P_B_L2DTMF: + if (test_bit(FLG_DTMFSEND, &ch->bch.Flags)) { + param[0] = 5; /* TOA 5 db */ + send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, + PMOD_DTMF_TRANS, 1, param); + } else { + param[0] = 40; /* REL -46 dbm */ + send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, + PMOD_DTMF, 1, param); + } + fallthrough; + case ISDN_P_B_MODEM_ASYNC: + ctrl = PMOD_DATAMODEM; + if (test_bit(FLG_ORIGIN, &ch->bch.Flags)) { + ctrl |= PCTRL_ORIG; + param[5] = PV32P6_CTN; + } else { + param[5] = PV32P6_ATN; + } + param[0] = 6; /* 6 db */ + param[1] = PV32P2_V23R | PV32P2_V22A | PV32P2_V22B | + PV32P2_V22C | PV32P2_V21 | PV32P2_BEL; + param[2] = PV32P3_AMOD | PV32P3_V32B | PV32P3_V23B; + param[3] = PV32P4_UT144; + param[4] = PV32P5_UT144; + send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, ctrl, 6, param); + break; + case ISDN_P_B_T30_FAX: + ctrl = PMOD_FAX; + if (test_bit(FLG_ORIGIN, &ch->bch.Flags)) { + ctrl |= PCTRL_ORIG; + param[1] = PFAXP2_CTN; + } else { + param[1] = PFAXP2_ATN; + } + param[0] = 6; /* 6 db */ + send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG, ctrl, 2, param); + ch->state = STFAX_NULL; + ch->newcmd = 0; + ch->newmod = 0; + test_and_set_bit(FLG_FTI_RUN, &ch->bch.Flags); + break; + } + udelay(1000); + send_mbox(ch->is, dps | ISAR_HIS_PSTREQ, 0, 0, NULL); + udelay(1000); +} + +static void +setup_sart(struct isar_ch *ch) { + u8 dps = SET_DPS(ch->dpath); + u8 ctrl, param[2] = {0, 0}; + + switch (ch->bch.state) { + case ISDN_P_NONE: + send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_DISABLE, + 0, NULL); + break; + case ISDN_P_B_RAW: + case ISDN_P_B_L2DTMF: + send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_BINARY, + 2, param); + break; + case ISDN_P_B_HDLC: + case ISDN_P_B_T30_FAX: + send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, SMODE_HDLC, + 1, param); + break; + case ISDN_P_B_MODEM_ASYNC: + ctrl = SMODE_V14 | SCTRL_HDMC_BOTH; + param[0] = S_P1_CHS_8; + param[1] = S_P2_BFT_DEF; + send_mbox(ch->is, dps | ISAR_HIS_SARTCFG, ctrl, 2, param); + break; + } + udelay(1000); + send_mbox(ch->is, dps | ISAR_HIS_BSTREQ, 0, 0, NULL); + udelay(1000); +} + +static void +setup_iom2(struct isar_ch *ch) { + u8 dps = SET_DPS(ch->dpath); + u8 cmsb = IOM_CTRL_ENA, msg[5] = {IOM_P1_TXD, 0, 0, 0, 0}; + + if (ch->bch.nr == 2) { + msg[1] = 1; + msg[3] = 1; + } + switch (ch->bch.state) { + case ISDN_P_NONE: + cmsb = 0; + /* dummy slot */ + msg[1] = ch->dpath + 2; + msg[3] = ch->dpath + 2; + break; + case ISDN_P_B_RAW: + case ISDN_P_B_HDLC: + break; + case ISDN_P_B_MODEM_ASYNC: + case ISDN_P_B_T30_FAX: + cmsb |= IOM_CTRL_RCV; + fallthrough; + case ISDN_P_B_L2DTMF: + if (test_bit(FLG_DTMFSEND, &ch->bch.Flags)) + cmsb |= IOM_CTRL_RCV; + cmsb |= IOM_CTRL_ALAW; + break; + } + send_mbox(ch->is, dps | ISAR_HIS_IOM2CFG, cmsb, 5, msg); + udelay(1000); + send_mbox(ch->is, dps | ISAR_HIS_IOM2REQ, 0, 0, NULL); + udelay(1000); +} + +static int +modeisar(struct isar_ch *ch, u32 bprotocol) +{ + /* Here we are selecting the best datapath for requested protocol */ + if (ch->bch.state == ISDN_P_NONE) { /* New Setup */ + switch (bprotocol) { + case ISDN_P_NONE: /* init */ + if (!ch->dpath) + /* no init for dpath 0 */ + return 0; + test_and_clear_bit(FLG_HDLC, &ch->bch.Flags); + test_and_clear_bit(FLG_TRANSPARENT, &ch->bch.Flags); + break; + case ISDN_P_B_RAW: + case ISDN_P_B_HDLC: + /* best is datapath 2 */ + if (!test_and_set_bit(ISAR_DP2_USE, &ch->is->Flags)) + ch->dpath = 2; + else if (!test_and_set_bit(ISAR_DP1_USE, + &ch->is->Flags)) + ch->dpath = 1; + else { + pr_info("modeisar both paths in use\n"); + return -EBUSY; + } + if (bprotocol == ISDN_P_B_HDLC) + test_and_set_bit(FLG_HDLC, &ch->bch.Flags); + else + test_and_set_bit(FLG_TRANSPARENT, + &ch->bch.Flags); + break; + case ISDN_P_B_MODEM_ASYNC: + case ISDN_P_B_T30_FAX: + case ISDN_P_B_L2DTMF: + /* only datapath 1 */ + if (!test_and_set_bit(ISAR_DP1_USE, &ch->is->Flags)) + ch->dpath = 1; + else { + pr_info("%s: ISAR modeisar analog functions" + "only with DP1\n", ch->is->name); + return -EBUSY; + } + break; + default: + pr_info("%s: protocol not known %x\n", ch->is->name, + bprotocol); + return -ENOPROTOOPT; + } + } + pr_debug("%s: ISAR ch%d dp%d protocol %x->%x\n", ch->is->name, + ch->bch.nr, ch->dpath, ch->bch.state, bprotocol); + ch->bch.state = bprotocol; + setup_pump(ch); + setup_iom2(ch); + setup_sart(ch); + if (ch->bch.state == ISDN_P_NONE) { + /* Clear resources */ + if (ch->dpath == 1) + test_and_clear_bit(ISAR_DP1_USE, &ch->is->Flags); + else if (ch->dpath == 2) + test_and_clear_bit(ISAR_DP2_USE, &ch->is->Flags); + ch->dpath = 0; + ch->is->ctrl(ch->is->hw, HW_DEACT_IND, ch->bch.nr); + } else + ch->is->ctrl(ch->is->hw, HW_ACTIVATE_IND, ch->bch.nr); + return 0; +} + +static void +isar_pump_cmd(struct isar_ch *ch, u32 cmd, u8 para) +{ + u8 dps = SET_DPS(ch->dpath); + u8 ctrl = 0, nom = 0, p1 = 0; + + pr_debug("%s: isar_pump_cmd %x/%x state(%x)\n", + ch->is->name, cmd, para, ch->bch.state); + switch (cmd) { + case HW_MOD_FTM: + if (ch->state == STFAX_READY) { + p1 = para; + ctrl = PCTRL_CMD_FTM; + nom = 1; + ch->state = STFAX_LINE; + ch->cmd = ctrl; + ch->mod = para; + ch->newmod = 0; + ch->newcmd = 0; + ch->try_mod = 3; + } else if ((ch->state == STFAX_ACTIV) && + (ch->cmd == PCTRL_CMD_FTM) && (ch->mod == para)) + deliver_status(ch, HW_MOD_CONNECT); + else { + ch->newmod = para; + ch->newcmd = PCTRL_CMD_FTM; + nom = 0; + ctrl = PCTRL_CMD_ESC; + ch->state = STFAX_ESCAPE; + } + break; + case HW_MOD_FTH: + if (ch->state == STFAX_READY) { + p1 = para; + ctrl = PCTRL_CMD_FTH; + nom = 1; + ch->state = STFAX_LINE; + ch->cmd = ctrl; + ch->mod = para; + ch->newmod = 0; + ch->newcmd = 0; + ch->try_mod = 3; + } else if ((ch->state == STFAX_ACTIV) && + (ch->cmd == PCTRL_CMD_FTH) && (ch->mod == para)) + deliver_status(ch, HW_MOD_CONNECT); + else { + ch->newmod = para; + ch->newcmd = PCTRL_CMD_FTH; + nom = 0; + ctrl = PCTRL_CMD_ESC; + ch->state = STFAX_ESCAPE; + } + break; + case HW_MOD_FRM: + if (ch->state == STFAX_READY) { + p1 = para; + ctrl = PCTRL_CMD_FRM; + nom = 1; + ch->state = STFAX_LINE; + ch->cmd = ctrl; + ch->mod = para; + ch->newmod = 0; + ch->newcmd = 0; + ch->try_mod = 3; + } else if ((ch->state == STFAX_ACTIV) && + (ch->cmd == PCTRL_CMD_FRM) && (ch->mod == para)) + deliver_status(ch, HW_MOD_CONNECT); + else { + ch->newmod = para; + ch->newcmd = PCTRL_CMD_FRM; + nom = 0; + ctrl = PCTRL_CMD_ESC; + ch->state = STFAX_ESCAPE; + } + break; + case HW_MOD_FRH: + if (ch->state == STFAX_READY) { + p1 = para; + ctrl = PCTRL_CMD_FRH; + nom = 1; + ch->state = STFAX_LINE; + ch->cmd = ctrl; + ch->mod = para; + ch->newmod = 0; + ch->newcmd = 0; + ch->try_mod = 3; + } else if ((ch->state == STFAX_ACTIV) && + (ch->cmd == PCTRL_CMD_FRH) && (ch->mod == para)) + deliver_status(ch, HW_MOD_CONNECT); + else { + ch->newmod = para; + ch->newcmd = PCTRL_CMD_FRH; + nom = 0; + ctrl = PCTRL_CMD_ESC; + ch->state = STFAX_ESCAPE; + } + break; + case PCTRL_CMD_TDTMF: + p1 = para; + nom = 1; + ctrl = PCTRL_CMD_TDTMF; + break; + } + if (ctrl) + send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL, ctrl, nom, &p1); +} + +static void +isar_setup(struct isar_hw *isar) +{ + u8 msg; + int i; + + /* Dpath 1, 2 */ + msg = 61; + for (i = 0; i < 2; i++) { + /* Buffer Config */ + send_mbox(isar, (i ? ISAR_HIS_DPS2 : ISAR_HIS_DPS1) | + ISAR_HIS_P12CFG, 4, 1, &msg); + isar->ch[i].mml = msg; + isar->ch[i].bch.state = 0; + isar->ch[i].dpath = i + 1; + modeisar(&isar->ch[i], ISDN_P_NONE); + } +} + +static int +isar_l2l1(struct mISDNchannel *ch, struct sk_buff *skb) +{ + struct bchannel *bch = container_of(ch, struct bchannel, ch); + struct isar_ch *ich = container_of(bch, struct isar_ch, bch); + int ret = -EINVAL; + struct mISDNhead *hh = mISDN_HEAD_P(skb); + u32 id, *val; + u_long flags; + + switch (hh->prim) { + case PH_DATA_REQ: + spin_lock_irqsave(ich->is->hwlock, flags); + ret = bchannel_senddata(bch, skb); + if (ret > 0) { /* direct TX */ + ret = 0; + isar_fill_fifo(ich); + } + spin_unlock_irqrestore(ich->is->hwlock, flags); + return ret; + case PH_ACTIVATE_REQ: + spin_lock_irqsave(ich->is->hwlock, flags); + if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) + ret = modeisar(ich, ch->protocol); + else + ret = 0; + spin_unlock_irqrestore(ich->is->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(ich->is->hwlock, flags); + mISDN_clear_bchannel(bch); + modeisar(ich, ISDN_P_NONE); + spin_unlock_irqrestore(ich->is->hwlock, flags); + _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, + NULL, GFP_KERNEL); + ret = 0; + break; + case PH_CONTROL_REQ: + val = (u32 *)skb->data; + pr_debug("%s: PH_CONTROL | REQUEST %x/%x\n", ich->is->name, + hh->id, *val); + if ((hh->id == 0) && ((*val & ~DTMF_TONE_MASK) == + DTMF_TONE_VAL)) { + if (bch->state == ISDN_P_B_L2DTMF) { + char tt = *val & DTMF_TONE_MASK; + + if (tt == '*') + tt = 0x1e; + else if (tt == '#') + tt = 0x1f; + else if (tt > '9') + tt -= 7; + tt &= 0x1f; + spin_lock_irqsave(ich->is->hwlock, flags); + isar_pump_cmd(ich, PCTRL_CMD_TDTMF, tt); + spin_unlock_irqrestore(ich->is->hwlock, flags); + } else { + pr_info("%s: DTMF send wrong protocol %x\n", + __func__, bch->state); + return -EINVAL; + } + } else if ((hh->id == HW_MOD_FRM) || (hh->id == HW_MOD_FRH) || + (hh->id == HW_MOD_FTM) || (hh->id == HW_MOD_FTH)) { + for (id = 0; id < FAXMODCNT; id++) + if (faxmodulation[id] == *val) + break; + if ((FAXMODCNT > id) && + test_bit(FLG_INITIALIZED, &bch->Flags)) { + pr_debug("%s: isar: new mod\n", ich->is->name); + isar_pump_cmd(ich, hh->id, *val); + ret = 0; + } else { + pr_info("%s: wrong modulation\n", + ich->is->name); + ret = -EINVAL; + } + } else if (hh->id == HW_MOD_LASTDATA) + test_and_set_bit(FLG_DLEETX, &bch->Flags); + else { + pr_info("%s: unknown PH_CONTROL_REQ %x\n", + ich->is->name, hh->id); + ret = -EINVAL; + } + fallthrough; + default: + pr_info("%s: %s unknown prim(%x,%x)\n", + ich->is->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 +isar_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg) +{ + struct bchannel *bch = container_of(ch, struct bchannel, ch); + struct isar_ch *ich = container_of(bch, struct isar_ch, bch); + int ret = -EINVAL; + u_long flags; + + pr_debug("%s: %s cmd:%x %p\n", ich->is->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(ich->is->hwlock, flags); + mISDN_clear_bchannel(bch); + modeisar(ich, ISDN_P_NONE); + spin_unlock_irqrestore(ich->is->hwlock, flags); + ch->protocol = ISDN_P_NONE; + ch->peer = NULL; + module_put(ich->is->owner); + ret = 0; + break; + case CONTROL_CHANNEL: + ret = channel_bctrl(bch, arg); + break; + default: + pr_info("%s: %s unknown prim(%x)\n", + ich->is->name, __func__, cmd); + } + return ret; +} + +static void +free_isar(struct isar_hw *isar) +{ + modeisar(&isar->ch[0], ISDN_P_NONE); + modeisar(&isar->ch[1], ISDN_P_NONE); + del_timer(&isar->ch[0].ftimer); + del_timer(&isar->ch[1].ftimer); + test_and_clear_bit(FLG_INITIALIZED, &isar->ch[0].bch.Flags); + test_and_clear_bit(FLG_INITIALIZED, &isar->ch[1].bch.Flags); +} + +static int +init_isar(struct isar_hw *isar) +{ + int cnt = 3; + + while (cnt--) { + isar->version = ISARVersion(isar); + if (isar->ch[0].bch.debug & DEBUG_HW) + pr_notice("%s: Testing version %d (%d time)\n", + isar->name, isar->version, 3 - cnt); + if (isar->version == 1) + break; + isar->ctrl(isar->hw, HW_RESET_REQ, 0); + } + if (isar->version != 1) + return -EINVAL; + timer_setup(&isar->ch[0].ftimer, ftimer_handler, 0); + test_and_set_bit(FLG_INITIALIZED, &isar->ch[0].bch.Flags); + timer_setup(&isar->ch[1].ftimer, ftimer_handler, 0); + test_and_set_bit(FLG_INITIALIZED, &isar->ch[1].bch.Flags); + return 0; +} + +static int +isar_open(struct isar_hw *isar, 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 = &isar->ch[rq->adr.channel - 1].bch; + if (test_and_set_bit(FLG_OPEN, &bch->Flags)) + return -EBUSY; /* b-channel can be only open once */ + bch->ch.protocol = rq->protocol; + rq->ch = &bch->ch; + return 0; +} + +u32 +mISDNisar_init(struct isar_hw *isar, void *hw) +{ + u32 ret, i; + + isar->hw = hw; + for (i = 0; i < 2; i++) { + isar->ch[i].bch.nr = i + 1; + mISDN_initbchannel(&isar->ch[i].bch, MAX_DATA_MEM, 32); + isar->ch[i].bch.ch.nr = i + 1; + isar->ch[i].bch.ch.send = &isar_l2l1; + isar->ch[i].bch.ch.ctrl = isar_bctrl; + isar->ch[i].bch.hw = hw; + isar->ch[i].is = isar; + } + + isar->init = &init_isar; + isar->release = &free_isar; + isar->firmware = &load_firmware; + isar->open = &isar_open; + + ret = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | + (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)) | + (1 << (ISDN_P_B_L2DTMF & ISDN_P_B_MASK)) | + (1 << (ISDN_P_B_MODEM_ASYNC & ISDN_P_B_MASK)) | + (1 << (ISDN_P_B_T30_FAX & ISDN_P_B_MASK)); + + return ret; +} +EXPORT_SYMBOL(mISDNisar_init); + +static int __init isar_mod_init(void) +{ + pr_notice("mISDN: ISAR driver Rev. %s\n", ISAR_REV); + return 0; +} + +static void __exit isar_mod_cleanup(void) +{ + pr_notice("mISDN: ISAR module unloaded\n"); +} +module_init(isar_mod_init); +module_exit(isar_mod_cleanup); |