source: rtems/bsps/arm/csb336/net/network.c @ 031df391

5
Last change on this file since 031df391 was 031df391, checked in by Sebastian Huber <sebastian.huber@…>, on 04/23/18 at 07:53:31

bsps: Move legacy network drivers to bsps

This patch is a part of the BSP source reorganization.

Update #3285.
  • Property mode set to 100644
File size: 18.4 KB
Line 
1/*
2 *  MC9323MXL Ethernet driver
3 *
4 *  Copyright (c) 2004 by Cogent Computer Systems
5 *  Written by Jay Monkman <jtm@lopingdog.com>
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.org/license/LICENSE.
10 */
11
12#define __INSIDE_RTEMS_BSD_TCPIP_STACK__
13
14#include <rtems.h>
15#include <rtems/rtems_bsdnet.h>
16#include <mc9328mxl.h>
17#include "lan91c11x.h"
18
19#include <stdio.h>
20#include <string.h>
21
22#include <errno.h>
23#include <rtems/error.h>
24#include <rtems/bspIo.h>
25#include <assert.h>
26
27#include <sys/param.h>
28#include <sys/mbuf.h>
29#include <sys/socket.h>
30#include <sys/sockio.h>
31
32#include <net/if.h>
33
34#include <netinet/in.h>
35#include <netinet/if_ether.h>
36
37#include <bsp/irq.h>
38
39/*  RTEMS event used by interrupt handler to start receive daemon. */
40#define START_RECEIVE_EVENT  RTEMS_EVENT_1
41
42/* RTEMS event used to start transmit daemon. */
43#define START_TRANSMIT_EVENT    RTEMS_EVENT_2
44
45static void enet_isr(void *);
46static void enet_isr_on(void);
47
48typedef struct {
49  unsigned long rx_packets;        /* total packets received         */
50  unsigned long tx_packets;        /* total packets transmitted      */
51  unsigned long rx_bytes;          /* total bytes received           */
52  unsigned long tx_bytes;          /* total bytes transmitted        */
53  unsigned long interrupts;        /* total number of interrupts     */
54  unsigned long rx_interrupts;     /* total number of rx interrupts  */
55  unsigned long tx_interrupts;     /* total number of tx interrupts  */
56  unsigned long txerr_interrupts;  /* total number of tx error interrupts  */
57
58} eth_stats_t;
59
60/*
61 * Hardware-specific storage
62 */
63typedef struct
64{
65    /*
66     * Connection to networking code
67     * This entry *must* be the first in the sonic_softc structure.
68     */
69    struct arpcom arpcom;
70
71    int accept_bcast;
72
73    /* Tasks waiting for interrupts */
74    rtems_id rx_task;
75    rtems_id tx_task;
76
77    eth_stats_t stats;
78
79} mc9328mxl_enet_softc_t;
80
81static mc9328mxl_enet_softc_t softc;
82
83
84/* function prototypes */
85int rtems_mc9328mxl_enet_attach(struct rtems_bsdnet_ifconfig *config,
86                                void *chip);
87void mc9328mxl_enet_init(void *arg);
88void mc9328mxl_enet_init_hw(mc9328mxl_enet_softc_t *sc);
89void mc9328mxl_enet_start(struct ifnet *ifp);
90void mc9328mxl_enet_stop (mc9328mxl_enet_softc_t *sc);
91void mc9328mxl_enet_tx_task (void *arg);
92void mc9328mxl_enet_sendpacket (struct ifnet *ifp, struct mbuf *m);
93void mc9328mxl_enet_rx_task(void *arg);
94void mc9328mxl_enet_stats(mc9328mxl_enet_softc_t *sc);
95static int mc9328mxl_enet_ioctl(struct ifnet *ifp,
96                                ioctl_command_t command, caddr_t data);
97
98
99int rtems_mc9328mxl_enet_attach (
100    struct rtems_bsdnet_ifconfig *config,
101    void *chip  /* only one ethernet, so no chip number */
102    )
103{
104    struct ifnet *ifp;
105    int mtu;
106    int unitnumber;
107    char *unitname;
108    int tmp;
109
110    /*
111     * Parse driver name
112     */
113    unitnumber = rtems_bsdnet_parse_driver_name(config, &unitname);
114    if (unitnumber < 0) {
115        return 0;
116    }
117
118    /*
119     * Is driver free?
120     */
121    if (unitnumber != 0) {
122        printf ("Bad MC9328MXL unit number.\n");
123        return 0;
124    }
125
126    ifp = &softc.arpcom.ac_if;
127    if (ifp->if_softc != NULL) {
128        printf ("Driver already in use.\n");
129        return 0;
130    }
131
132    /* zero out the control structure  */
133    memset( &softc, 0, sizeof(softc) );
134
135
136    /* set the MAC address */
137    tmp = lan91c11x_read_reg(LAN91C11X_IA0);
138    softc.arpcom.ac_enaddr[0] = tmp & 0xff;
139    softc.arpcom.ac_enaddr[1] = (tmp >> 8) & 0xff;
140
141    tmp = lan91c11x_read_reg(LAN91C11X_IA2);
142    softc.arpcom.ac_enaddr[2] = tmp & 0xff;
143    softc.arpcom.ac_enaddr[3] = (tmp >> 8) & 0xff;
144
145    tmp = lan91c11x_read_reg(LAN91C11X_IA4);
146    softc.arpcom.ac_enaddr[4] = tmp & 0xff;
147    softc.arpcom.ac_enaddr[5] = (tmp >> 8) & 0xff;
148
149    if (config->mtu) {
150        mtu = config->mtu;
151    } else {
152        mtu = ETHERMTU;
153    }
154
155    softc.accept_bcast = !config->ignore_broadcast;
156
157    /*
158     * Set up network interface values
159     */
160    ifp->if_softc = &softc;
161    ifp->if_unit = unitnumber;
162    ifp->if_name = unitname;
163    ifp->if_mtu = mtu;
164    ifp->if_init = mc9328mxl_enet_init;
165    ifp->if_ioctl = mc9328mxl_enet_ioctl;
166    ifp->if_start = mc9328mxl_enet_start;
167    ifp->if_output = ether_output;
168    ifp->if_flags = IFF_BROADCAST;
169    if (ifp->if_snd.ifq_maxlen == 0) {
170        ifp->if_snd.ifq_maxlen = ifqmaxlen;
171    }
172
173    /* Attach the interface */
174    if_attach (ifp);
175    ether_ifattach (ifp);
176    return 1;
177}
178
179void mc9328mxl_enet_init(void *arg)
180{
181    mc9328mxl_enet_softc_t     *sc = arg;
182    struct ifnet *ifp = &sc->arpcom.ac_if;
183
184    /*
185     *This is for stuff that only gets done once (mc9328mxl_enet_init()
186     * gets called multiple times
187     */
188    if (sc->tx_task == 0)
189    {
190        /* Set up ENET hardware */
191        mc9328mxl_enet_init_hw(sc);
192
193        /* Start driver tasks */
194        sc->rx_task = rtems_bsdnet_newproc("ENrx",
195                                           4096,
196                                           mc9328mxl_enet_rx_task,
197                                           sc);
198        sc->tx_task = rtems_bsdnet_newproc("ENtx",
199                                           4096,
200                                           mc9328mxl_enet_tx_task,
201                                           sc);
202    } /* if tx_task */
203
204
205    /* Configure for promiscuous if needed */
206    if (ifp->if_flags & IFF_PROMISC) {
207        lan91c11x_write_reg(LAN91C11X_RCR,
208                            (lan91c11x_read_reg(LAN91C11X_RCR) |
209                             LAN91C11X_RCR_PRMS));
210    }
211
212
213    /*
214     * Tell the world that we're running.
215     */
216    ifp->if_flags |= IFF_RUNNING;
217
218    /* Enable TX/RX */
219    lan91c11x_write_reg(LAN91C11X_TCR,
220                        (lan91c11x_read_reg(LAN91C11X_TCR) |
221                         LAN91C11X_TCR_TXENA));
222
223    lan91c11x_write_reg(LAN91C11X_RCR,
224                        (lan91c11x_read_reg(LAN91C11X_RCR) |
225                         LAN91C11X_RCR_RXEN));
226
227
228} /* mc9328mxl_enet_init() */
229
230void  mc9328mxl_enet_init_hw(mc9328mxl_enet_softc_t *sc)
231{
232    uint16_t stat;
233    uint16_t my = 0;
234    rtems_status_code status = RTEMS_SUCCESSFUL;
235
236    lan91c11x_write_reg(LAN91C11X_RCR, LAN91C11X_RCR_RST);
237    lan91c11x_write_reg(LAN91C11X_RCR, 0);
238    rtems_task_wake_after(1);
239
240    /* Reset the PHY */
241    lan91c11x_write_phy_reg(PHY_CTRL, PHY_CTRL_RST);
242    while(lan91c11x_read_phy_reg(PHY_CTRL) & PHY_CTRL_RST) {
243        rtems_task_wake_after(1);
244    }
245
246
247    stat = lan91c11x_read_phy_reg(PHY_STAT);
248
249    if(stat & PHY_STAT_CAPT4) {
250        my |= PHY_ADV_T4;
251    }
252/* 100Mbs doesn't work, so we won't advertise it */
253
254    if(stat & PHY_STAT_CAPTXF) {
255        my |= PHY_ADV_TXFDX;
256    }
257    if(stat & PHY_STAT_CAPTXH) {
258        my |= PHY_ADV_TXHDX;
259    }
260
261    if(stat & PHY_STAT_CAPTF) {
262        my |= PHY_ADV_10FDX;
263    }
264
265    if(stat & PHY_STAT_CAPTH) {
266        my |= PHY_ADV_10HDX;
267    }
268
269    my |= PHY_ADV_CSMA;
270
271    lan91c11x_write_phy_reg(PHY_AD, my);
272
273
274    /* Enable Autonegotiation */
275#if 0
276    lan91c11x_write_phy_reg(PHY_CTRL,
277                            (PHY_CTRL_ANEGEN | PHY_CTRL_ANEGRST));
278#endif
279
280    /* Enable full duplex, let MAC take care
281     * of padding and CRC.
282     */
283    lan91c11x_write_reg(LAN91C11X_TCR,
284                        (LAN91C11X_TCR_PADEN |
285                         LAN91C11X_TCR_SWFDUP));
286
287    /* Disable promisc, don'tstrip CRC */
288    lan91c11x_write_reg(LAN91C11X_RCR, 0);
289
290    /* Enable auto-negotiation, LEDA is link, LEDB is traffic */
291    lan91c11x_write_reg(LAN91C11X_RPCR,
292                        (LAN91C11X_RPCR_ANEG |
293                         LAN91C11X_RPCR_LS2B));
294
295    /* Don't add wait states, enable PHY power */
296    lan91c11x_write_reg(LAN91C11X_CONFIG,
297                        (LAN91C11X_CONFIG_NOWAIT |
298                         LAN91C11X_CONFIG_PWR));
299
300    /* Disable error interrupts, enable auto release */
301    lan91c11x_write_reg(LAN91C11X_CTRL, LAN91C11X_CTRL_AUTO);
302
303    /* Reset MMU */
304    lan91c11x_write_reg(LAN91C11X_MMUCMD,
305                        LAN91C11X_MMUCMD_RESETMMU );
306
307
308    rtems_task_wake_after(100);
309    /* Enable Autonegotiation */
310    lan91c11x_write_phy_reg(PHY_CTRL, 0x3000);
311    rtems_task_wake_after(100);
312
313    /* Enable Interrupts for RX */
314    lan91c11x_write_reg(LAN91C11X_INT, LAN91C11X_INT_RXMASK);
315
316    /* Enable interrupts on GPIO Port A3 */
317    /*   Make pin 3 an input */
318    MC9328MXL_GPIOA_DDIR &= ~bit(3);
319
320    /*   Use GPIO function for pin 3 */
321    MC9328MXL_GPIOA_GIUS |= bit(3);
322
323    /*   Set for active high, level triggered interupt */
324    MC9328MXL_GPIOA_ICR1 = ((MC9328MXL_GPIOA_ICR1 & ~(3 << 6)) |
325                              (2 << 6));
326
327    /*   Enable GPIO port A3 interrupt */
328    MC9328MXL_GPIOA_IMR |= bit(3);
329
330    /* Install the interrupt handler */
331    status = rtems_interrupt_handler_install(
332        BSP_INT_GPIO_PORTA,
333        "Network",
334        RTEMS_INTERRUPT_UNIQUE,
335        enet_isr,
336        (void *)BSP_INT_GPIO_PORTA
337    );
338    assert(status == RTEMS_SUCCESSFUL);
339    enet_isr_on();
340
341} /* mc9328mxl_enet_init_hw() */
342
343void mc9328mxl_enet_start(struct ifnet *ifp)
344{
345    mc9328mxl_enet_softc_t *sc = ifp->if_softc;
346
347    rtems_bsdnet_event_send(sc->tx_task, START_TRANSMIT_EVENT);
348    ifp->if_flags |= IFF_OACTIVE;
349}
350
351void mc9328mxl_enet_stop (mc9328mxl_enet_softc_t *sc)
352{
353    struct ifnet *ifp = &sc->arpcom.ac_if;
354
355    ifp->if_flags &= ~IFF_RUNNING;
356
357
358    /* Stop the transmitter and receiver. */
359    lan91c11x_write_reg(LAN91C11X_TCR,
360                        (lan91c11x_read_reg(LAN91C11X_TCR) &
361                         ~LAN91C11X_TCR_TXENA));
362
363    lan91c11x_write_reg(LAN91C11X_RCR,
364                        (lan91c11x_read_reg(LAN91C11X_RCR) &
365                        ~LAN91C11X_RCR_RXEN));
366
367}
368
369/*
370 * Driver transmit daemon
371 */
372void mc9328mxl_enet_tx_task(void *arg)
373{
374    mc9328mxl_enet_softc_t *sc = (mc9328mxl_enet_softc_t *)arg;
375    struct ifnet *ifp = &sc->arpcom.ac_if;
376    struct mbuf *m;
377    rtems_event_set events;
378
379    for (;;)
380    {
381        rtems_bsdnet_event_receive(
382            START_TRANSMIT_EVENT,
383            RTEMS_EVENT_ANY | RTEMS_WAIT,
384            RTEMS_NO_TIMEOUT,
385            &events);
386
387        /* Send packets till queue is empty */
388        for (;;)
389        {
390            /* Get the next mbuf chain to transmit. */
391            IF_DEQUEUE(&ifp->if_snd, m);
392            if (!m) {
393                break;
394            }
395            mc9328mxl_enet_sendpacket (ifp, m);
396            softc.stats.tx_packets++;
397
398        }
399        ifp->if_flags &= ~IFF_OACTIVE;
400    }
401}
402
403/* Send packet */
404void mc9328mxl_enet_sendpacket (struct ifnet *ifp, struct mbuf *m)
405{
406    struct mbuf *l = NULL;
407    int size = 0;
408    int tmp;
409    int i;
410    int start;
411    uint16_t d;
412
413    /* How big is the packet ? */
414    l = m;
415    do {
416        size += l->m_len;
417        l = l->m_next;
418    } while (l != NULL);
419
420    /* Allocate a TX buffer */
421    lan91c11x_write_reg(LAN91C11X_MMUCMD,
422                        (LAN91C11X_MMUCMD_ALLOCTX |
423                         (size >> 8)));
424
425    /* Wait for the allocation */
426    while ((lan91c11x_read_reg(LAN91C11X_INT) & LAN91C11X_INT_ALLOC) == 0) {
427        continue;
428    }
429
430    tmp = lan91c11x_read_reg(LAN91C11X_PNR);
431    lan91c11x_write_reg(LAN91C11X_PNR, ((tmp >> 8) & 0xff));
432
433    /* Set the data pointer for auto increment */
434    lan91c11x_write_reg(LAN91C11X_PTR, LAN91C11X_PTR_AUTOINC);
435
436    /* A delay is needed between pointer and data access ?!? */
437    for (i = 0; i < 10; i++) {
438        continue;
439    }
440
441    /* Write status word */
442    lan91c11x_write_reg(LAN91C11X_DATA, 0);
443
444    /* Write byte count */
445    if (size & 1) {
446        size++;
447    }
448    lan91c11x_write_reg(LAN91C11X_DATA, size + 6);
449
450    lan91c11x_lock();
451
452    /* Copy the mbuf */
453    l = m;
454    start = 0;
455    d = 0;
456    while (l != NULL)
457    {
458        uint8_t *data;
459
460        data = mtod(l, uint8_t *);
461
462        for (i = start; i < l->m_len; i++) {
463            if ((i & 1) == 0) {
464                d = data[i] << 8;
465            } else {
466                d = d | data[i];
467                lan91c11x_write_reg_fast(LAN91C11X_DATA, htons(d));
468            }
469        }
470
471        /* If everything is 2 byte aligned, i will be even */
472        start = (i & 1);
473
474        l = l->m_next;
475    }
476
477    /* write control byte */
478    if (i & 1) {
479        lan91c11x_write_reg_fast(LAN91C11X_DATA,
480                            htons(LAN91C11X_PKT_CTRL_ODD | d));
481    } else {
482        lan91c11x_write_reg_fast(LAN91C11X_DATA, 0);
483    }
484
485    lan91c11x_unlock();
486
487    /* Enable TX interrupts */
488    lan91c11x_write_reg(LAN91C11X_INT,
489                        (lan91c11x_read_reg(LAN91C11X_INT) |
490                         LAN91C11X_INT_TXMASK |
491                         LAN91C11X_INT_TXEMASK));
492
493    /* Enqueue it */
494    lan91c11x_write_reg(LAN91C11X_MMUCMD,
495                        LAN91C11X_MMUCMD_ENQUEUE);
496
497    /* free the mbuf chain we just copied */
498    m_freem(m);
499
500} /* mc9328mxl_enet_sendpacket () */
501
502
503/* reader task */
504void mc9328mxl_enet_rx_task(void *arg)
505{
506    mc9328mxl_enet_softc_t *sc = (mc9328mxl_enet_softc_t *)arg;
507    struct ifnet *ifp = &sc->arpcom.ac_if;
508    struct mbuf *m;
509    struct ether_header *eh;
510    rtems_event_set events;
511    int pktlen;
512    uint16_t rsw;
513    uint16_t bc;
514    uint16_t cbyte;
515    int i;
516    uint16_t int_reg;
517
518    /* Input packet handling loop */
519    while (1) {
520        rtems_bsdnet_event_receive(
521            START_RECEIVE_EVENT,
522            RTEMS_EVENT_ANY | RTEMS_WAIT,
523            RTEMS_NO_TIMEOUT,
524            &events);
525
526        /* Configure for reads from RX data area */
527        lan91c11x_write_reg(LAN91C11X_PTR,
528                            (LAN91C11X_PTR_AUTOINC |
529                             LAN91C11X_PTR_RCV |
530                             LAN91C11X_PTR_READ));
531
532        /* read the receive status word */
533        rsw = lan91c11x_read_reg(LAN91C11X_DATA);
534        /* TBD: Need to check rsw here */
535
536        /* read the byte count */
537        bc = lan91c11x_read_reg(LAN91C11X_DATA);
538        pktlen = (bc & 0x7ff) - 6;
539
540        /* get an mbuf for this packet */
541        MGETHDR(m, M_WAIT, MT_DATA);
542
543        /* now get a cluster pointed to by the mbuf */
544        /* since an mbuf by itself is too small */
545        MCLGET(m, M_WAIT);
546
547        lan91c11x_lock();
548
549        /* Copy the received packet into an mbuf */
550        for (i = 0; i < (pktlen / 2); i++) {
551            ((uint16_t*)m->m_ext.ext_buf)[i] =
552                lan91c11x_read_reg_fast(LAN91C11X_DATA);
553        }
554
555        cbyte = lan91c11x_read_reg_fast(LAN91C11X_DATA);
556        if (cbyte & LAN91C11X_PKT_CTRL_ODD) {
557            ((uint16_t*)m->m_ext.ext_buf)[i] = cbyte;
558            pktlen++;
559        }
560        lan91c11x_unlock();
561
562        /* Release the packets memory */
563        lan91c11x_write_reg(LAN91C11X_MMUCMD,
564                            LAN91C11X_MMUCMD_REMTOP);
565
566        /* set the receiving interface */
567        m->m_pkthdr.rcvif = ifp;
568        m->m_nextpkt = 0;
569
570        /* set the length of the mbuf */
571        m->m_len = pktlen - (sizeof(struct ether_header));
572        m->m_pkthdr.len = m->m_len;
573
574        /* strip off the ethernet header from the mbuf */
575        /* but save the pointer to it */
576        eh = mtod (m, struct ether_header *);
577        m->m_data += sizeof(struct ether_header);
578
579
580        softc.stats.rx_packets++;
581
582        /* give all this stuff to the stack */
583        ether_input(ifp, eh, m);
584
585        /* renable RX interrupts */
586        int_reg = lan91c11x_read_reg(LAN91C11X_INT);
587        int_reg |= LAN91C11X_INT_RXMASK;
588        lan91c11x_write_reg(LAN91C11X_INT, int_reg);
589
590    }
591} /* mc9328mxl_enet_rx_task */
592
593
594/* Show interface statistics */
595void mc9328mxl_enet_stats (mc9328mxl_enet_softc_t *sc)
596{
597    printf (" Total Interrupts:%-8lu",         sc->stats.interrupts);
598    printf ("   Rx Interrupts:%-8lu",          sc->stats.rx_interrupts);
599    printf ("   Tx Interrupts:%-8lu\n",        sc->stats.tx_interrupts);
600    printf (" Tx Error Interrupts:%-8lu\n",    sc->stats.txerr_interrupts);
601    printf (" Rx Packets:%-8lu",               sc->stats.rx_packets);
602    printf ("   Tx Packets:%-8lu\n",           sc->stats.tx_packets);
603}
604
605
606/* Enables mc9328mxl_enet interrupts. */
607static void enet_isr_on(void)
608{
609    /* Enable interrupts */
610    MC9328MXL_AITC_INTENNUM = MC9328MXL_INT_GPIO_PORTA;
611
612    return;
613}
614
615/*  Driver ioctl handler */
616static int
617mc9328mxl_enet_ioctl (struct ifnet *ifp, ioctl_command_t command, caddr_t data)
618{
619    mc9328mxl_enet_softc_t *sc = ifp->if_softc;
620    int error = 0;
621
622    switch (command) {
623    case SIOCGIFADDR:
624    case SIOCSIFADDR:
625        ether_ioctl (ifp, command, data);
626        break;
627
628    case SIOCSIFFLAGS:
629        switch (ifp->if_flags & (IFF_UP | IFF_RUNNING))
630        {
631        case IFF_RUNNING:
632            mc9328mxl_enet_stop (sc);
633            break;
634
635        case IFF_UP:
636            mc9328mxl_enet_init (sc);
637            break;
638
639        case IFF_UP | IFF_RUNNING:
640            mc9328mxl_enet_stop (sc);
641            mc9328mxl_enet_init (sc);
642            break;
643
644        default:
645            break;
646        } /* switch (if_flags) */
647        break;
648
649    case SIO_RTEMS_SHOW_STATS:
650        mc9328mxl_enet_stats (sc);
651        break;
652
653        /*
654         * FIXME: All sorts of multicast commands need to be added here!
655         */
656    default:
657        error = EINVAL;
658        break;
659    } /* switch (command) */
660    return error;
661}
662
663/* interrupt handler */
664static void enet_isr(void * unused)
665{
666    uint16_t int_reg;
667
668    softc.stats.interrupts++;
669    /* get the ISR status and determine RX or TX */
670    int_reg = lan91c11x_read_reg(LAN91C11X_INT);
671
672    /* Handle RX interrupts */
673    if ((int_reg & LAN91C11X_INT_RX) && (int_reg & LAN91C11X_INT_RXMASK)) {
674        softc.stats.rx_interrupts++;
675
676        /* Disable the interrupt */
677        int_reg &= ~LAN91C11X_INT_RXMASK;
678
679        rtems_bsdnet_event_send (softc.rx_task, START_RECEIVE_EVENT);
680    }
681
682    /* Handle TX Empty interrupts */
683    if ((int_reg & LAN91C11X_INT_TXE) && (int_reg & LAN91C11X_INT_TXEMASK)) {
684        softc.stats.tx_interrupts++;
685
686        /* Disable the interrupt */
687        int_reg &= ~LAN91C11X_INT_TXEMASK;
688
689        /* Acknowledge the interrupt */
690        int_reg |= LAN91C11X_INT_TXE;
691
692        rtems_bsdnet_event_send(softc.tx_task, START_TRANSMIT_EVENT);
693
694    }
695
696    /* Handle interrupts for transmit errors */
697    if ((int_reg & LAN91C11X_INT_TX) && (int_reg & LAN91C11X_INT_TXMASK)) {
698        softc.stats.txerr_interrupts++;
699        printk("Caught TX interrupt - error on transmission\n");
700    }
701
702    /* Update the interrupt register on the 91c11x */
703    lan91c11x_write_reg(LAN91C11X_INT, int_reg);
704
705    /* clear GPIO Int. status */
706    MC9328MXL_GPIOA_ISR |= bit(3);
707}
708
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