t1isa.c

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/* $Id: t1isa.c,v 1.1.2.3 2004/02/10 01:07:12 keil Exp $
 *
 * Module for AVM T1 HEMA-card.
 *
 * Copyright 1999 by Carsten Paeth <[email protected]>
 *
 * This software may be used and distributed according to the terms
 * of the GNU General Public License, incorporated herein by reference.
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/capi.h>
#include <linux/netdevice.h>
#include <linux/kernelcapi.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/gfp.h>
#include <asm/io.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"

/* ------------------------------------------------------------- */

static char *revision = "$Revision: 1.1.2.3 $";

/* ------------------------------------------------------------- */

MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM T1 HEMA ISA card");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");

/* ------------------------------------------------------------- */

static int hema_irq_table[16] =
{0,
 0,
 0,
 0x80,              /* irq 3 */
 0,
 0x90,              /* irq 5 */
 0,
 0xA0,              /* irq 7 */
 0,
 0xB0,              /* irq 9 */
 0xC0,              /* irq 10 */
 0xD0,              /* irq 11 */
 0xE0,              /* irq 12 */
 0,
 0,
 0xF0,              /* irq 15 */
};

static int t1_detectandinit(unsigned int base, unsigned irq, int cardnr)
{
    unsigned char cregs[8];
    unsigned char reverse_cardnr;
    unsigned char dummy;
    int i;

    reverse_cardnr =   ((cardnr & 0x01) << 3) | ((cardnr & 0x02) << 1)
        | ((cardnr & 0x04) >> 1) | ((cardnr & 0x08) >> 3);
    cregs[0] = (HEMA_VERSION_ID << 4) | (reverse_cardnr & 0xf);
    cregs[1] = 0x00; /* fast & slow link connected to CON1 */
    cregs[2] = 0x05; /* fast link 20MBit, slow link 20 MBit */
    cregs[3] = 0;
    cregs[4] = 0x11; /* zero wait state */
    cregs[5] = hema_irq_table[irq & 0xf];
    cregs[6] = 0;
    cregs[7] = 0;

    /*
     * no one else should use the ISA bus in this moment,
     * but no function there to prevent this :-(
     * save_flags(flags); cli();
     */

    /* board reset */
    t1outp(base, T1_RESETBOARD, 0xf);
    mdelay(100);
    dummy = t1inp(base, T1_FASTLINK + T1_OUTSTAT); /* first read */

    /* write config */
    dummy = (base >> 4) & 0xff;
    for (i = 1; i <= 0xf; i++) t1outp(base, i, dummy);
    t1outp(base, HEMA_PAL_ID & 0xf, dummy);
    t1outp(base, HEMA_PAL_ID >> 4, cregs[0]);
    for (i = 1; i < 7; i++) t1outp(base, 0, cregs[i]);
    t1outp(base, ((base >> 4)) & 0x3, cregs[7]);
    /* restore_flags(flags); */

    mdelay(100);
    t1outp(base, T1_FASTLINK + T1_RESETLINK, 0);
    t1outp(base, T1_SLOWLINK + T1_RESETLINK, 0);
    mdelay(10);
    t1outp(base, T1_FASTLINK + T1_RESETLINK, 1);
    t1outp(base, T1_SLOWLINK + T1_RESETLINK, 1);
    mdelay(100);
    t1outp(base, T1_FASTLINK + T1_RESETLINK, 0);
    t1outp(base, T1_SLOWLINK + T1_RESETLINK, 0);
    mdelay(10);
    t1outp(base, T1_FASTLINK + T1_ANALYSE, 0);
    mdelay(5);
    t1outp(base, T1_SLOWLINK + T1_ANALYSE, 0);

    if (t1inp(base, T1_FASTLINK + T1_OUTSTAT) != 0x1) /* tx empty */
        return 1;
    if (t1inp(base, T1_FASTLINK + T1_INSTAT) != 0x0) /* rx empty */
        return 2;
    if (t1inp(base, T1_FASTLINK + T1_IRQENABLE) != 0x0)
        return 3;
    if ((t1inp(base, T1_FASTLINK + T1_FIFOSTAT) & 0xf0) != 0x70)
        return 4;
    if ((t1inp(base, T1_FASTLINK + T1_IRQMASTER) & 0x0e) != 0)
        return 5;
    if ((t1inp(base, T1_FASTLINK + T1_IDENT) & 0x7d) != 1)
        return 6;
    if (t1inp(base, T1_SLOWLINK + T1_OUTSTAT) != 0x1) /* tx empty */
        return 7;
    if ((t1inp(base, T1_SLOWLINK + T1_IRQMASTER) & 0x0e) != 0)
        return 8;
    if ((t1inp(base, T1_SLOWLINK + T1_IDENT) & 0x7d) != 0)
        return 9;
    return 0;
}

static irqreturn_t t1isa_interrupt(int interrupt, void *devptr)
{
    avmcard *card = devptr;
    avmctrl_info *cinfo = &card->ctrlinfo[0];
    struct capi_ctr *ctrl = &cinfo->capi_ctrl;
    unsigned char b1cmd;
    struct sk_buff *skb;

    unsigned ApplId;
    unsigned MsgLen;
    unsigned DataB3Len;
    unsigned NCCI;
    unsigned WindowSize;
    unsigned long flags;

    spin_lock_irqsave(&card->lock, flags);

    while (b1_rx_full(card->port)) {

        b1cmd = b1_get_byte(card->port);

        switch (b1cmd) {

        case RECEIVE_DATA_B3_IND:

            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = t1_get_slice(card->port, card->msgbuf);
            DataB3Len = t1_get_slice(card->port, card->databuf);
            spin_unlock_irqrestore(&card->lock, flags);

            if (MsgLen < 30) { /* not CAPI 64Bit */
                memset(card->msgbuf + MsgLen, 0, 30 - MsgLen);
                MsgLen = 30;
                CAPIMSG_SETLEN(card->msgbuf, 30);
            }
            if (!(skb = alloc_skb(DataB3Len + MsgLen, GFP_ATOMIC))) {
                printk(KERN_ERR "%s: incoming packet dropped\n",
                       card->name);
            } else {
                memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
                memcpy(skb_put(skb, DataB3Len), card->databuf, DataB3Len);
                capi_ctr_handle_message(ctrl, ApplId, skb);
            }
            break;

        case RECEIVE_MESSAGE:

            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = t1_get_slice(card->port, card->msgbuf);
            if (!(skb = alloc_skb(MsgLen, GFP_ATOMIC))) {
                spin_unlock_irqrestore(&card->lock, flags);
                printk(KERN_ERR "%s: incoming packet dropped\n",
                       card->name);
            } else {
                memcpy(skb_put(skb, MsgLen), card->msgbuf, MsgLen);
                if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3)
                    capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
                                 CAPIMSG_NCCI(skb->data),
                                 CAPIMSG_MSGID(skb->data));
                spin_unlock_irqrestore(&card->lock, flags);
                capi_ctr_handle_message(ctrl, ApplId, skb);
            }
            break;

        case RECEIVE_NEW_NCCI:

            ApplId = b1_get_word(card->port);
            NCCI = b1_get_word(card->port);
            WindowSize = b1_get_word(card->port);
            capilib_new_ncci(&cinfo->ncci_head, ApplId, NCCI, WindowSize);
            spin_unlock_irqrestore(&card->lock, flags);
            break;

        case RECEIVE_FREE_NCCI:

            ApplId = b1_get_word(card->port);
            NCCI = b1_get_word(card->port);
            if (NCCI != 0xffffffff)
                capilib_free_ncci(&cinfo->ncci_head, ApplId, NCCI);
            spin_unlock_irqrestore(&card->lock, flags);
            break;

        case RECEIVE_START:
            b1_put_byte(card->port, SEND_POLLACK);
            spin_unlock_irqrestore(&card->lock, flags);
            capi_ctr_resume_output(ctrl);
            break;

        case RECEIVE_STOP:
            spin_unlock_irqrestore(&card->lock, flags);
            capi_ctr_suspend_output(ctrl);
            break;

        case RECEIVE_INIT:

            cinfo->versionlen = t1_get_slice(card->port, cinfo->versionbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            b1_parse_version(cinfo);
            printk(KERN_INFO "%s: %s-card (%s) now active\n",
                   card->name,
                   cinfo->version[VER_CARDTYPE],
                   cinfo->version[VER_DRIVER]);
            capi_ctr_ready(ctrl);
            break;

        case RECEIVE_TASK_READY:
            ApplId = (unsigned) b1_get_word(card->port);
            MsgLen = t1_get_slice(card->port, card->msgbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            card->msgbuf[MsgLen] = 0;
            while (MsgLen > 0
                   && (card->msgbuf[MsgLen - 1] == '\n'
                   || card->msgbuf[MsgLen - 1] == '\r')) {
                card->msgbuf[MsgLen - 1] = 0;
                MsgLen--;
            }
            printk(KERN_INFO "%s: task %d \"%s\" ready.\n",
                   card->name, ApplId, card->msgbuf);
            break;

        case RECEIVE_DEBUGMSG:
            MsgLen = t1_get_slice(card->port, card->msgbuf);
            spin_unlock_irqrestore(&card->lock, flags);
            card->msgbuf[MsgLen] = 0;
            while (MsgLen > 0
                   && (card->msgbuf[MsgLen - 1] == '\n'
                   || card->msgbuf[MsgLen - 1] == '\r')) {
                card->msgbuf[MsgLen - 1] = 0;
                MsgLen--;
            }
            printk(KERN_INFO "%s: DEBUG: %s\n", card->name, card->msgbuf);
            break;


        case 0xff:
            spin_unlock_irqrestore(&card->lock, flags);
            printk(KERN_ERR "%s: card reseted ?\n", card->name);
            return IRQ_HANDLED;
        default:
            spin_unlock_irqrestore(&card->lock, flags);
            printk(KERN_ERR "%s: b1_interrupt: 0x%x ???\n",
                   card->name, b1cmd);
            return IRQ_NONE;
        }
    }
    return IRQ_HANDLED;
}

/* ------------------------------------------------------------- */

static int t1isa_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
    avmcard *card = cinfo->card;
    unsigned int port = card->port;
    unsigned long flags;
    int retval;

    t1_disable_irq(port);
    b1_reset(port);

    if ((retval = b1_load_t4file(card, &data->firmware))) {
        b1_reset(port);
        printk(KERN_ERR "%s: failed to load t4file!!\n",
               card->name);
        return retval;
    }

    if (data->configuration.len > 0 && data->configuration.data) {
        if ((retval = b1_load_config(card, &data->configuration))) {
            b1_reset(port);
            printk(KERN_ERR "%s: failed to load config!!\n",
                   card->name);
            return retval;
        }
    }

    if (!b1_loaded(card)) {
        printk(KERN_ERR "%s: failed to load t4file.\n", card->name);
        return -EIO;
    }

    spin_lock_irqsave(&card->lock, flags);
    b1_setinterrupt(port, card->irq, card->cardtype);
    b1_put_byte(port, SEND_INIT);
    b1_put_word(port, CAPI_MAXAPPL);
    b1_put_word(port, AVM_NCCI_PER_CHANNEL * 30);
    b1_put_word(port, ctrl->cnr - 1);
    spin_unlock_irqrestore(&card->lock, flags);

    return 0;
}

static void t1isa_reset_ctr(struct capi_ctr *ctrl)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
    avmcard *card = cinfo->card;
    unsigned int port = card->port;
    unsigned long flags;

    t1_disable_irq(port);
    b1_reset(port);
    b1_reset(port);

    memset(cinfo->version, 0, sizeof(cinfo->version));
    spin_lock_irqsave(&card->lock, flags);
    capilib_release(&cinfo->ncci_head);
    spin_unlock_irqrestore(&card->lock, flags);
    capi_ctr_down(ctrl);
}

static void t1isa_remove(struct pci_dev *pdev)
{
    avmctrl_info *cinfo = pci_get_drvdata(pdev);
    avmcard *card;

    if (!cinfo)
        return;

    card = cinfo->card;

    t1_disable_irq(card->port);
    b1_reset(card->port);
    b1_reset(card->port);
    t1_reset(card->port);

    detach_capi_ctr(&cinfo->capi_ctrl);
    free_irq(card->irq, card);
    release_region(card->port, AVMB1_PORTLEN);
    b1_free_card(card);
}

/* ------------------------------------------------------------- */

static u16 t1isa_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
static char *t1isa_procinfo(struct capi_ctr *ctrl);

static int t1isa_probe(struct pci_dev *pdev, int cardnr)
{
    avmctrl_info *cinfo;
    avmcard *card;
    int retval;

    card = b1_alloc_card(1);
    if (!card) {
        printk(KERN_WARNING "t1isa: no memory.\n");
        retval = -ENOMEM;
        goto err;
    }

    cinfo = card->ctrlinfo;
    card->port = pci_resource_start(pdev, 0);
    card->irq = pdev->irq;
    card->cardtype = avm_t1isa;
    card->cardnr = cardnr;
    sprintf(card->name, "t1isa-%x", card->port);

    if (!(((card->port & 0x7) == 0) && ((card->port & 0x30) != 0x30))) {
        printk(KERN_WARNING "t1isa: invalid port 0x%x.\n", card->port);
        retval = -EINVAL;
        goto err_free;
    }
    if (hema_irq_table[card->irq & 0xf] == 0) {
        printk(KERN_WARNING "t1isa: irq %d not valid.\n", card->irq);
        retval = -EINVAL;
        goto err_free;
    }
    if (!request_region(card->port, AVMB1_PORTLEN, card->name)) {
        printk(KERN_INFO "t1isa: ports 0x%03x-0x%03x in use.\n",
               card->port, card->port + AVMB1_PORTLEN);
        retval = -EBUSY;
        goto err_free;
    }
    retval = request_irq(card->irq, t1isa_interrupt, 0, card->name, card);
    if (retval) {
        printk(KERN_INFO "t1isa: unable to get IRQ %d.\n", card->irq);
        retval = -EBUSY;
        goto err_release_region;
    }

    if ((retval = t1_detectandinit(card->port, card->irq, card->cardnr)) != 0) {
        printk(KERN_INFO "t1isa: NO card at 0x%x (%d)\n",
               card->port, retval);
        retval = -ENODEV;
        goto err_free_irq;
    }
    t1_disable_irq(card->port);
    b1_reset(card->port);

    cinfo->capi_ctrl.owner = THIS_MODULE;
    cinfo->capi_ctrl.driver_name   = "t1isa";
    cinfo->capi_ctrl.driverdata    = cinfo;
    cinfo->capi_ctrl.register_appl = b1_register_appl;
    cinfo->capi_ctrl.release_appl  = b1_release_appl;
    cinfo->capi_ctrl.send_message  = t1isa_send_message;
    cinfo->capi_ctrl.load_firmware = t1isa_load_firmware;
    cinfo->capi_ctrl.reset_ctr     = t1isa_reset_ctr;
    cinfo->capi_ctrl.procinfo      = t1isa_procinfo;
    cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
    strcpy(cinfo->capi_ctrl.name, card->name);

    retval = attach_capi_ctr(&cinfo->capi_ctrl);
    if (retval) {
        printk(KERN_INFO "t1isa: attach controller failed.\n");
        goto err_free_irq;
    }

    printk(KERN_INFO "t1isa: AVM T1 ISA at i/o %#x, irq %d, card %d\n",
           card->port, card->irq, card->cardnr);

    pci_set_drvdata(pdev, cinfo);
    return 0;

err_free_irq:
    free_irq(card->irq, card);
err_release_region:
    release_region(card->port, AVMB1_PORTLEN);
err_free:
    b1_free_card(card);
err:
    return retval;
}

static u16 t1isa_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
    avmcard *card = cinfo->card;
    unsigned int port = card->port;
    unsigned long flags;
    u16 len = CAPIMSG_LEN(skb->data);
    u8 cmd = CAPIMSG_COMMAND(skb->data);
    u8 subcmd = CAPIMSG_SUBCOMMAND(skb->data);
    u16 dlen, retval;

    spin_lock_irqsave(&card->lock, flags);
    if (CAPICMD(cmd, subcmd) == CAPI_DATA_B3_REQ) {
        retval = capilib_data_b3_req(&cinfo->ncci_head,
                         CAPIMSG_APPID(skb->data),
                         CAPIMSG_NCCI(skb->data),
                         CAPIMSG_MSGID(skb->data));
        if (retval != CAPI_NOERROR) {
            spin_unlock_irqrestore(&card->lock, flags);
            return retval;
        }
        dlen = CAPIMSG_DATALEN(skb->data);

        b1_put_byte(port, SEND_DATA_B3_REQ);
        t1_put_slice(port, skb->data, len);
        t1_put_slice(port, skb->data + len, dlen);
    } else {
        b1_put_byte(port, SEND_MESSAGE);
        t1_put_slice(port, skb->data, len);
    }
    spin_unlock_irqrestore(&card->lock, flags);
    dev_kfree_skb_any(skb);
    return CAPI_NOERROR;
}
/* ------------------------------------------------------------- */

static char *t1isa_procinfo(struct capi_ctr *ctrl)
{
    avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);

    if (!cinfo)
        return "";
    sprintf(cinfo->infobuf, "%s %s 0x%x %d %d",
        cinfo->cardname[0] ? cinfo->cardname : "-",
        cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
        cinfo->card ? cinfo->card->port : 0x0,
        cinfo->card ? cinfo->card->irq : 0,
        cinfo->card ? cinfo->card->cardnr : 0
        );
    return cinfo->infobuf;
}


/* ------------------------------------------------------------- */

#define MAX_CARDS 4
static struct pci_dev isa_dev[MAX_CARDS];
static int io[MAX_CARDS];
static int irq[MAX_CARDS];
static int cardnr[MAX_CARDS];

module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(cardnr, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
MODULE_PARM_DESC(cardnr, "Card number(s) (as jumpered)");

static int t1isa_add_card(struct capi_driver *driver, capicardparams *data)
{
    int i;

    for (i = 0; i < MAX_CARDS; i++) {
        if (isa_dev[i].resource[0].start)
            continue;

        isa_dev[i].resource[0].start = data->port;
        isa_dev[i].irq = data->irq;

        if (t1isa_probe(&isa_dev[i], data->cardnr) == 0)
            return 0;
    }
    return -ENODEV;
}

static struct capi_driver capi_driver_t1isa = {
    .name       = "t1isa",
    .revision   = "1.0",
    .add_card       = t1isa_add_card,
};

static int __init t1isa_init(void)
{
    char rev[32];
    char *p;
    int i;

    if ((p = strchr(revision, ':')) != NULL && p[1]) {
        strlcpy(rev, p + 2, 32);
        if ((p = strchr(rev, '$')) != NULL && p > rev)
            *(p - 1) = 0;
    } else
        strcpy(rev, "1.0");

    for (i = 0; i < MAX_CARDS; i++) {
        if (!io[i])
            break;

        isa_dev[i].resource[0].start = io[i];
        isa_dev[i].irq = irq[i];

        if (t1isa_probe(&isa_dev[i], cardnr[i]) != 0)
            return -ENODEV;
    }

    strlcpy(capi_driver_t1isa.revision, rev, 32);
    register_capi_driver(&capi_driver_t1isa);
    printk(KERN_INFO "t1isa: revision %s\n", rev);

    return 0;
}

static void __exit t1isa_exit(void)
{
    int i;

    unregister_capi_driver(&capi_driver_t1isa);
    for (i = 0; i < MAX_CARDS; i++) {
        if (!io[i])
            break;

        t1isa_remove(&isa_dev[i]);
    }
}

module_init(t1isa_init);
module_exit(t1isa_exit);