2 * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
3 * All rights reserved. www.lanmedia.com
6 * This code is written by:
17 * This software may be used and distributed according to the terms
18 * of the GNU General Public License version 2, incorporated herein by reference.
20 * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
22 * To control link specific options lmcctl is required.
23 * It can be obtained from ftp.lanmedia.com.
26 * Linux uses the device struct lmc_private to pass private information
29 * The initialization portion of this driver (the lmc_reset() and the
30 * lmc_dec_reset() functions, as well as the led controls and the
31 * lmc_initcsrs() functions.
33 * The watchdog function runs every second and checks to see if
34 * we still have link, and that the timing source is what we expected
35 * it to be. If link is lost, the interface is marked down, and
36 * we no longer can transmit.
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/string.h>
43 #include <linux/timer.h>
44 #include <linux/ptrace.h>
45 #include <linux/errno.h>
46 #include <linux/ioport.h>
47 #include <linux/slab.h>
48 #include <linux/interrupt.h>
49 #include <linux/pci.h>
50 #include <linux/delay.h>
51 #include <linux/hdlc.h>
52 #include <linux/init.h>
54 #include <linux/if_arp.h>
55 #include <linux/netdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/skbuff.h>
58 #include <linux/inet.h>
59 #include <linux/bitops.h>
60 #include <asm/processor.h> /* Processor type for cache alignment. */
63 #include <asm/uaccess.h>
64 //#include <asm/spinlock.h>
66 #define DRIVER_MAJOR_VERSION 1
67 #define DRIVER_MINOR_VERSION 34
68 #define DRIVER_SUB_VERSION 0
70 #define DRIVER_VERSION ((DRIVER_MAJOR_VERSION << 8) + DRIVER_MINOR_VERSION)
74 #include "lmc_ioctl.h"
75 #include "lmc_debug.h"
76 #include "lmc_proto.h"
78 static int LMC_PKT_BUF_SZ = 1542;
80 static DEFINE_PCI_DEVICE_TABLE(lmc_pci_tbl) = {
81 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
82 PCI_VENDOR_ID_LMC, PCI_ANY_ID },
83 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
84 PCI_ANY_ID, PCI_VENDOR_ID_LMC },
88 MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
89 MODULE_LICENSE("GPL v2");
92 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
93 struct net_device *dev);
94 static int lmc_rx (struct net_device *dev);
95 static int lmc_open(struct net_device *dev);
96 static int lmc_close(struct net_device *dev);
97 static struct net_device_stats *lmc_get_stats(struct net_device *dev);
98 static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
99 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
100 static void lmc_softreset(lmc_softc_t * const);
101 static void lmc_running_reset(struct net_device *dev);
102 static int lmc_ifdown(struct net_device * const);
103 static void lmc_watchdog(unsigned long data);
104 static void lmc_reset(lmc_softc_t * const sc);
105 static void lmc_dec_reset(lmc_softc_t * const sc);
106 static void lmc_driver_timeout(struct net_device *dev);
109 * linux reserves 16 device specific IOCTLs. We call them
110 * LMCIOC* to control various bits of our world.
112 int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
114 lmc_softc_t *sc = dev_to_sc(dev);
116 int ret = -EOPNOTSUPP;
120 lmc_trace(dev, "lmc_ioctl in");
123 * Most functions mess with the structure
124 * Disable interrupts while we do the polling
129 * Return current driver state. Since we keep this up
130 * To date internally, just copy this out to the user.
132 case LMCIOCGINFO: /*fold01*/
133 if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
139 case LMCIOCSINFO: /*fold01*/
140 if (!capable(CAP_NET_ADMIN)) {
145 if(dev->flags & IFF_UP){
150 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
155 spin_lock_irqsave(&sc->lmc_lock, flags);
156 sc->lmc_media->set_status (sc, &ctl);
158 if(ctl.crc_length != sc->ictl.crc_length) {
159 sc->lmc_media->set_crc_length(sc, ctl.crc_length);
160 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
161 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
163 sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
165 spin_unlock_irqrestore(&sc->lmc_lock, flags);
170 case LMCIOCIFTYPE: /*fold01*/
172 u16 old_type = sc->if_type;
175 if (!capable(CAP_NET_ADMIN)) {
180 if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
186 if (new_type == old_type)
189 break; /* no change */
192 spin_lock_irqsave(&sc->lmc_lock, flags);
195 sc->if_type = new_type;
196 lmc_proto_attach(sc);
197 ret = lmc_proto_open(sc);
198 spin_unlock_irqrestore(&sc->lmc_lock, flags);
202 case LMCIOCGETXINFO: /*fold01*/
203 spin_lock_irqsave(&sc->lmc_lock, flags);
204 sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
206 sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
207 sc->lmc_xinfo.PciSlotNumber = 0;
208 sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
209 sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
210 sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
211 sc->lmc_xinfo.XilinxRevisionNumber =
212 lmc_mii_readreg (sc, 0, 3) & 0xf;
213 sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
214 sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
215 sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
216 spin_unlock_irqrestore(&sc->lmc_lock, flags);
218 sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
220 if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
221 sizeof(struct lmc_xinfo)))
228 case LMCIOCGETLMCSTATS:
229 spin_lock_irqsave(&sc->lmc_lock, flags);
230 if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
231 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
232 sc->extra_stats.framingBitErrorCount +=
233 lmc_mii_readreg(sc, 0, 18) & 0xff;
234 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
235 sc->extra_stats.framingBitErrorCount +=
236 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
237 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
238 sc->extra_stats.lineCodeViolationCount +=
239 lmc_mii_readreg(sc, 0, 18) & 0xff;
240 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
241 sc->extra_stats.lineCodeViolationCount +=
242 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
243 lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
244 regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
246 sc->extra_stats.lossOfFrameCount +=
247 (regVal & T1FRAMER_LOF_MASK) >> 4;
248 sc->extra_stats.changeOfFrameAlignmentCount +=
249 (regVal & T1FRAMER_COFA_MASK) >> 2;
250 sc->extra_stats.severelyErroredFrameCount +=
251 regVal & T1FRAMER_SEF_MASK;
253 spin_unlock_irqrestore(&sc->lmc_lock, flags);
254 if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
255 sizeof(sc->lmc_device->stats)) ||
256 copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
257 &sc->extra_stats, sizeof(sc->extra_stats)))
263 case LMCIOCCLEARLMCSTATS:
264 if (!capable(CAP_NET_ADMIN)) {
269 spin_lock_irqsave(&sc->lmc_lock, flags);
270 memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
271 memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
272 sc->extra_stats.check = STATCHECK;
273 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
274 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
275 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
276 spin_unlock_irqrestore(&sc->lmc_lock, flags);
280 case LMCIOCSETCIRCUIT: /*fold01*/
281 if (!capable(CAP_NET_ADMIN)){
286 if(dev->flags & IFF_UP){
291 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
295 spin_lock_irqsave(&sc->lmc_lock, flags);
296 sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
297 sc->ictl.circuit_type = ctl.circuit_type;
298 spin_unlock_irqrestore(&sc->lmc_lock, flags);
303 case LMCIOCRESET: /*fold01*/
304 if (!capable(CAP_NET_ADMIN)){
309 spin_lock_irqsave(&sc->lmc_lock, flags);
310 /* Reset driver and bring back to current state */
311 printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
312 lmc_running_reset (dev);
313 printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
315 LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
316 spin_unlock_irqrestore(&sc->lmc_lock, flags);
322 case LMCIOCDUMPEVENTLOG:
323 if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
327 if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
328 sizeof(lmcEventLogBuf)))
334 #endif /* end ifdef _DBG_EVENTLOG */
335 case LMCIOCT1CONTROL: /*fold01*/
336 if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
341 case LMCIOCXILINX: /*fold01*/
343 struct lmc_xilinx_control xc; /*fold02*/
345 if (!capable(CAP_NET_ADMIN)){
351 * Stop the xwitter whlie we restart the hardware
353 netif_stop_queue(dev);
355 if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
360 case lmc_xilinx_reset: /*fold02*/
363 spin_lock_irqsave(&sc->lmc_lock, flags);
364 mii = lmc_mii_readreg (sc, 0, 16);
367 * Make all of them 0 and make input
369 lmc_gpio_mkinput(sc, 0xff);
372 * make the reset output
374 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
377 * RESET low to force configuration. This also forces
378 * the transmitter clock to be internal, but we expect to reset
382 sc->lmc_gpio &= ~LMC_GEP_RESET;
383 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
387 * hold for more than 10 microseconds
391 sc->lmc_gpio |= LMC_GEP_RESET;
392 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
396 * stop driving Xilinx-related signals
398 lmc_gpio_mkinput(sc, 0xff);
400 /* Reset the frammer hardware */
401 sc->lmc_media->set_link_status (sc, 1);
402 sc->lmc_media->set_status (sc, NULL);
403 // lmc_softreset(sc);
407 for(i = 0; i < 5; i++){
408 lmc_led_on(sc, LMC_DS3_LED0);
410 lmc_led_off(sc, LMC_DS3_LED0);
411 lmc_led_on(sc, LMC_DS3_LED1);
413 lmc_led_off(sc, LMC_DS3_LED1);
414 lmc_led_on(sc, LMC_DS3_LED3);
416 lmc_led_off(sc, LMC_DS3_LED3);
417 lmc_led_on(sc, LMC_DS3_LED2);
419 lmc_led_off(sc, LMC_DS3_LED2);
422 spin_unlock_irqrestore(&sc->lmc_lock, flags);
431 case lmc_xilinx_load_prom: /*fold02*/
434 int timeout = 500000;
435 spin_lock_irqsave(&sc->lmc_lock, flags);
436 mii = lmc_mii_readreg (sc, 0, 16);
439 * Make all of them 0 and make input
441 lmc_gpio_mkinput(sc, 0xff);
444 * make the reset output
446 lmc_gpio_mkoutput(sc, LMC_GEP_DP | LMC_GEP_RESET);
449 * RESET low to force configuration. This also forces
450 * the transmitter clock to be internal, but we expect to reset
454 sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
455 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
459 * hold for more than 10 microseconds
463 sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
464 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
467 * busy wait for the chip to reset
469 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
475 * stop driving Xilinx-related signals
477 lmc_gpio_mkinput(sc, 0xff);
478 spin_unlock_irqrestore(&sc->lmc_lock, flags);
487 case lmc_xilinx_load: /*fold02*/
491 int timeout = 500000;
498 data = kmalloc(xc.len, GFP_KERNEL);
504 if(copy_from_user(data, xc.data, xc.len))
511 printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
513 spin_lock_irqsave(&sc->lmc_lock, flags);
514 lmc_gpio_mkinput(sc, 0xff);
517 * Clear the Xilinx and start prgramming from the DEC
528 sc->lmc_gpio &= ~LMC_GEP_DP;
529 sc->lmc_gpio &= ~LMC_GEP_RESET;
530 sc->lmc_gpio |= LMC_GEP_MODE;
531 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
533 lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET);
536 * Wait at least 10 us 20 to be safe
541 * Clear reset and activate programming lines
548 lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET);
551 * Set LOAD, DATA, Clock to 1
554 sc->lmc_gpio |= LMC_GEP_MODE;
555 sc->lmc_gpio |= LMC_GEP_DATA;
556 sc->lmc_gpio |= LMC_GEP_CLK;
557 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
559 lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE );
562 * busy wait for the chip to reset
564 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
568 printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
570 for(pos = 0; pos < xc.len; pos++){
573 sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */
576 sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */
579 printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]);
580 sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */
582 sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */
583 sc->lmc_gpio |= LMC_GEP_MODE;
584 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
587 sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */
588 sc->lmc_gpio |= LMC_GEP_MODE;
589 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
592 if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){
593 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name);
595 else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){
596 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name);
599 printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos);
602 lmc_gpio_mkinput(sc, 0xff);
604 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
605 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
607 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
608 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
609 spin_unlock_irqrestore(&sc->lmc_lock, flags);
622 netif_wake_queue(dev);
628 /* If we don't know what to do, give the protocol a shot. */
629 ret = lmc_proto_ioctl (sc, ifr, cmd);
633 lmc_trace(dev, "lmc_ioctl out");
639 /* the watchdog process that cruises around */
640 static void lmc_watchdog (unsigned long data) /*fold00*/
642 struct net_device *dev = (struct net_device *)data;
643 lmc_softc_t *sc = dev_to_sc(dev);
648 lmc_trace(dev, "lmc_watchdog in");
650 spin_lock_irqsave(&sc->lmc_lock, flags);
652 if(sc->check != 0xBEAFCAFE){
653 printk("LMC: Corrupt net_device struct, breaking out\n");
654 spin_unlock_irqrestore(&sc->lmc_lock, flags);
659 /* Make sure the tx jabber and rx watchdog are off,
660 * and the transmit and receive processes are running.
663 LMC_CSR_WRITE (sc, csr_15, 0x00000011);
664 sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
665 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
670 LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
672 /* --- begin time out check -----------------------------------
673 * check for a transmit interrupt timeout
674 * Has the packet xmt vs xmt serviced threshold been exceeded */
675 if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
676 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
677 sc->tx_TimeoutInd == 0)
680 /* wait for the watchdog to come around again */
681 sc->tx_TimeoutInd = 1;
683 else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
684 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
688 LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0);
690 sc->tx_TimeoutDisplay = 1;
691 sc->extra_stats.tx_TimeoutCnt++;
693 /* DEC chip is stuck, hit it with a RESET!!!! */
694 lmc_running_reset (dev);
697 /* look at receive & transmit process state to make sure they are running */
698 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
700 /* look at: DSR - 02 for Reg 16
706 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17));
708 /* reset the transmit timeout detection flag */
709 sc->tx_TimeoutInd = 0;
710 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
711 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
713 sc->tx_TimeoutInd = 0;
714 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
715 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
718 /* --- end time out check ----------------------------------- */
721 link_status = sc->lmc_media->get_link_status (sc);
724 * hardware level link lost, but the interface is marked as up.
727 if ((link_status == 0) && (sc->last_link_status != 0)) {
728 printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name);
729 sc->last_link_status = 0;
730 /* lmc_reset (sc); Why reset??? The link can go down ok */
732 /* Inform the world that link has been lost */
733 netif_carrier_off(dev);
737 * hardware link is up, but the interface is marked as down.
738 * Bring it back up again.
740 if (link_status != 0 && sc->last_link_status == 0) {
741 printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name);
742 sc->last_link_status = 1;
743 /* lmc_reset (sc); Again why reset??? */
745 netif_carrier_on(dev);
748 /* Call media specific watchdog functions */
749 sc->lmc_media->watchdog(sc);
752 * Poke the transmitter to make sure it
753 * never stops, even if we run out of mem
755 LMC_CSR_WRITE(sc, csr_rxpoll, 0);
758 * Check for code that failed
759 * and try and fix it as appropriate
761 if(sc->failed_ring == 1){
763 * Failed to setup the recv/xmit rin
769 if(sc->failed_recv_alloc == 1){
771 * We failed to alloc mem in the
772 * interrupt handler, go through the rings
775 sc->failed_recv_alloc = 0;
781 * remember the timer value
785 ticks = LMC_CSR_READ (sc, csr_gp_timer);
786 LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL);
787 sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
790 * restart this timer.
792 sc->timer.expires = jiffies + (HZ);
793 add_timer (&sc->timer);
795 spin_unlock_irqrestore(&sc->lmc_lock, flags);
797 lmc_trace(dev, "lmc_watchdog out");
801 static int lmc_attach(struct net_device *dev, unsigned short encoding,
802 unsigned short parity)
804 if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
809 static const struct net_device_ops lmc_ops = {
810 .ndo_open = lmc_open,
811 .ndo_stop = lmc_close,
812 .ndo_change_mtu = hdlc_change_mtu,
813 .ndo_start_xmit = hdlc_start_xmit,
814 .ndo_do_ioctl = lmc_ioctl,
815 .ndo_tx_timeout = lmc_driver_timeout,
816 .ndo_get_stats = lmc_get_stats,
819 static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
822 struct net_device *dev;
826 static int cards_found;
828 /* lmc_trace(dev, "lmc_init_one in"); */
830 err = pci_enable_device(pdev);
832 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
836 err = pci_request_regions(pdev, "lmc");
838 printk(KERN_ERR "lmc: pci_request_region failed\n");
843 * Allocate our own device structure
845 sc = kzalloc(sizeof(lmc_softc_t), GFP_KERNEL);
851 dev = alloc_hdlcdev(sc);
853 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
858 dev->type = ARPHRD_HDLC;
859 dev_to_hdlc(dev)->xmit = lmc_start_xmit;
860 dev_to_hdlc(dev)->attach = lmc_attach;
861 dev->netdev_ops = &lmc_ops;
862 dev->watchdog_timeo = HZ; /* 1 second */
863 dev->tx_queue_len = 100;
864 sc->lmc_device = dev;
865 sc->name = dev->name;
866 sc->if_type = LMC_PPP;
867 sc->check = 0xBEAFCAFE;
868 dev->base_addr = pci_resource_start(pdev, 0);
869 dev->irq = pdev->irq;
870 pci_set_drvdata(pdev, dev);
871 SET_NETDEV_DEV(dev, &pdev->dev);
874 * This will get the protocol layer ready and do any 1 time init's
875 * Must have a valid sc and dev structure
877 lmc_proto_attach(sc);
879 /* Init the spin lock so can call it latter */
881 spin_lock_init(&sc->lmc_lock);
882 pci_set_master(pdev);
884 printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
885 dev->base_addr, dev->irq);
887 err = register_hdlc_device(dev);
889 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
894 sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
895 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
899 * Check either the subvendor or the subdevice, some systems reverse
900 * the setting in the bois, seems to be version and arch dependent?
901 * Fix the error, exchange the two values
903 if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
904 subdevice = pdev->subsystem_vendor;
907 case PCI_DEVICE_ID_LMC_HSSI:
908 printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
909 sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
910 sc->lmc_media = &lmc_hssi_media;
912 case PCI_DEVICE_ID_LMC_DS3:
913 printk(KERN_INFO "%s: LMC DS3\n", dev->name);
914 sc->lmc_cardtype = LMC_CARDTYPE_DS3;
915 sc->lmc_media = &lmc_ds3_media;
917 case PCI_DEVICE_ID_LMC_SSI:
918 printk(KERN_INFO "%s: LMC SSI\n", dev->name);
919 sc->lmc_cardtype = LMC_CARDTYPE_SSI;
920 sc->lmc_media = &lmc_ssi_media;
922 case PCI_DEVICE_ID_LMC_T1:
923 printk(KERN_INFO "%s: LMC T1\n", dev->name);
924 sc->lmc_cardtype = LMC_CARDTYPE_T1;
925 sc->lmc_media = &lmc_t1_media;
928 printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
932 lmc_initcsrs (sc, dev->base_addr, 8);
934 lmc_gpio_mkinput (sc, 0xff);
935 sc->lmc_gpio = 0; /* drive no signals yet */
937 sc->lmc_media->defaults (sc);
939 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
941 /* verify that the PCI Sub System ID matches the Adapter Model number
942 * from the MII register
944 AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
946 if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
947 subdevice != PCI_DEVICE_ID_LMC_T1) &&
948 (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
949 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
950 (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
951 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
952 (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
953 subdevice != PCI_DEVICE_ID_LMC_HSSI))
954 printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
955 " Subsystem ID = 0x%04x\n",
956 dev->name, AdapModelNum, subdevice);
961 LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
963 sc->board_idx = cards_found++;
964 sc->extra_stats.check = STATCHECK;
965 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
966 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
967 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
970 sc->last_link_status = 0;
972 lmc_trace(dev, "lmc_init_one out");
976 pci_set_drvdata(pdev, NULL);
979 pci_release_regions(pdev);
981 pci_disable_device(pdev);
986 * Called from pci when removing module.
988 static void lmc_remove_one(struct pci_dev *pdev)
990 struct net_device *dev = pci_get_drvdata(pdev);
993 printk(KERN_DEBUG "%s: removing...\n", dev->name);
994 unregister_hdlc_device(dev);
996 pci_release_regions(pdev);
997 pci_disable_device(pdev);
998 pci_set_drvdata(pdev, NULL);
1002 /* After this is called, packets can be sent.
1003 * Does not initialize the addresses
1005 static int lmc_open(struct net_device *dev)
1007 lmc_softc_t *sc = dev_to_sc(dev);
1010 lmc_trace(dev, "lmc_open in");
1012 lmc_led_on(sc, LMC_DS3_LED0);
1017 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
1018 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
1019 lmc_mii_readreg(sc, 0, 17));
1022 lmc_trace(dev, "lmc_open lmc_ok out");
1028 /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1029 if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1030 printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1031 lmc_trace(dev, "lmc_open irq failed out");
1036 /* Assert Terminal Active */
1037 sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1038 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1041 * reset to last state.
1043 sc->lmc_media->set_status (sc, NULL);
1045 /* setup default bits to be used in tulip_desc_t transmit descriptor
1047 sc->TxDescriptControlInit = (
1048 LMC_TDES_INTERRUPT_ON_COMPLETION
1049 | LMC_TDES_FIRST_SEGMENT
1050 | LMC_TDES_LAST_SEGMENT
1051 | LMC_TDES_SECOND_ADDR_CHAINED
1052 | LMC_TDES_DISABLE_PADDING
1055 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1056 /* disable 32 bit CRC generated by ASIC */
1057 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1059 sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1060 /* Acknoledge the Terminal Active and light LEDs */
1062 /* dev->flags |= IFF_UP; */
1064 if ((err = lmc_proto_open(sc)) != 0)
1067 netif_start_queue(dev);
1068 sc->extra_stats.tx_tbusy0++;
1071 * select what interrupts we want to get
1073 sc->lmc_intrmask = 0;
1074 /* Should be using the default interrupt mask defined in the .h file. */
1075 sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1078 | TULIP_STS_ABNRMLINTR
1079 | TULIP_STS_SYSERROR
1080 | TULIP_STS_TXSTOPPED
1081 | TULIP_STS_TXUNDERFLOW
1082 | TULIP_STS_RXSTOPPED
1085 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1087 sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1088 sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1089 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1091 sc->lmc_ok = 1; /* Run watchdog */
1094 * Set the if up now - pfb
1097 sc->last_link_status = 1;
1100 * Setup a timer for the watchdog on probe, and start it running.
1101 * Since lmc_ok == 0, it will be a NOP for now.
1103 init_timer (&sc->timer);
1104 sc->timer.expires = jiffies + HZ;
1105 sc->timer.data = (unsigned long) dev;
1106 sc->timer.function = lmc_watchdog;
1107 add_timer (&sc->timer);
1109 lmc_trace(dev, "lmc_open out");
1114 /* Total reset to compensate for the AdTran DSU doing bad things
1118 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1120 lmc_softc_t *sc = dev_to_sc(dev);
1122 lmc_trace(dev, "lmc_running_reset in");
1124 /* stop interrupts */
1125 /* Clear the interrupt mask */
1126 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1131 /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1132 sc->lmc_media->set_link_status (sc, 1);
1133 sc->lmc_media->set_status (sc, NULL);
1135 netif_wake_queue(dev);
1138 sc->extra_stats.tx_tbusy0++;
1140 sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1141 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1143 sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1144 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1146 lmc_trace(dev, "lmc_runnin_reset_out");
1150 /* This is what is called when you ifconfig down a device.
1151 * This disables the timer for the watchdog and keepalives,
1152 * and disables the irq for dev.
1154 static int lmc_close(struct net_device *dev)
1156 /* not calling release_region() as we should */
1157 lmc_softc_t *sc = dev_to_sc(dev);
1159 lmc_trace(dev, "lmc_close in");
1162 sc->lmc_media->set_link_status (sc, 0);
1163 del_timer (&sc->timer);
1164 lmc_proto_close(sc);
1167 lmc_trace(dev, "lmc_close out");
1172 /* Ends the transfer of packets */
1173 /* When the interface goes down, this is called */
1174 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1176 lmc_softc_t *sc = dev_to_sc(dev);
1180 lmc_trace(dev, "lmc_ifdown in");
1182 /* Don't let anything else go on right now */
1184 netif_stop_queue(dev);
1185 sc->extra_stats.tx_tbusy1++;
1187 /* stop interrupts */
1188 /* Clear the interrupt mask */
1189 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1191 /* Stop Tx and Rx on the chip */
1192 csr6 = LMC_CSR_READ (sc, csr_command);
1193 csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */
1194 csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */
1195 LMC_CSR_WRITE (sc, csr_command, csr6);
1197 sc->lmc_device->stats.rx_missed_errors +=
1198 LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1200 /* release the interrupt */
1201 if(sc->got_irq == 1){
1202 free_irq (dev->irq, dev);
1206 /* free skbuffs in the Rx queue */
1207 for (i = 0; i < LMC_RXDESCS; i++)
1209 struct sk_buff *skb = sc->lmc_rxq[i];
1210 sc->lmc_rxq[i] = NULL;
1211 sc->lmc_rxring[i].status = 0;
1212 sc->lmc_rxring[i].length = 0;
1213 sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1216 sc->lmc_rxq[i] = NULL;
1219 for (i = 0; i < LMC_TXDESCS; i++)
1221 if (sc->lmc_txq[i] != NULL)
1222 dev_kfree_skb(sc->lmc_txq[i]);
1223 sc->lmc_txq[i] = NULL;
1226 lmc_led_off (sc, LMC_MII16_LED_ALL);
1228 netif_wake_queue(dev);
1229 sc->extra_stats.tx_tbusy0++;
1231 lmc_trace(dev, "lmc_ifdown out");
1236 /* Interrupt handling routine. This will take an incoming packet, or clean
1237 * up after a trasmit.
1239 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1241 struct net_device *dev = (struct net_device *) dev_instance;
1242 lmc_softc_t *sc = dev_to_sc(dev);
1248 int max_work = LMC_RXDESCS;
1251 lmc_trace(dev, "lmc_interrupt in");
1253 spin_lock(&sc->lmc_lock);
1256 * Read the csr to find what interrupts we have (if any)
1258 csr = LMC_CSR_READ (sc, csr_status);
1261 * Make sure this is our interrupt
1263 if ( ! (csr & sc->lmc_intrmask)) {
1264 goto lmc_int_fail_out;
1269 /* always go through this loop at least once */
1270 while (csr & sc->lmc_intrmask) {
1274 * Clear interrupt bits, we handle all case below
1276 LMC_CSR_WRITE (sc, csr_status, csr);
1280 * - Transmit process timed out CSR5<1>
1281 * - Transmit jabber timeout CSR5<3>
1282 * - Transmit underflow CSR5<5>
1283 * - Transmit Receiver buffer unavailable CSR5<7>
1284 * - Receive process stopped CSR5<8>
1285 * - Receive watchdog timeout CSR5<9>
1286 * - Early transmit interrupt CSR5<10>
1288 * Is this really right? Should we do a running reset for jabber?
1289 * (being a WAN card and all)
1291 if (csr & TULIP_STS_ABNRMLINTR){
1292 lmc_running_reset (dev);
1296 if (csr & TULIP_STS_RXINTR){
1297 lmc_trace(dev, "rx interrupt");
1301 if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1304 /* reset the transmit timeout detection flag -baz */
1305 sc->extra_stats.tx_NoCompleteCnt = 0;
1307 badtx = sc->lmc_taint_tx;
1308 i = badtx % LMC_TXDESCS;
1310 while ((badtx < sc->lmc_next_tx)) {
1311 stat = sc->lmc_txring[i].status;
1313 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1314 sc->lmc_txring[i].length);
1316 * If bit 31 is 1 the tulip owns it break out of the loop
1318 if (stat & 0x80000000)
1321 n_compl++ ; /* i.e., have an empty slot in ring */
1323 * If we have no skbuff or have cleared it
1324 * Already continue to the next buffer
1326 if (sc->lmc_txq[i] == NULL)
1330 * Check the total error summary to look for any errors
1332 if (stat & 0x8000) {
1333 sc->lmc_device->stats.tx_errors++;
1335 sc->lmc_device->stats.tx_aborted_errors++;
1337 sc->lmc_device->stats.tx_carrier_errors++;
1339 sc->lmc_device->stats.tx_window_errors++;
1341 sc->lmc_device->stats.tx_fifo_errors++;
1343 sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1345 sc->lmc_device->stats.tx_packets++;
1348 // dev_kfree_skb(sc->lmc_txq[i]);
1349 dev_kfree_skb_irq(sc->lmc_txq[i]);
1350 sc->lmc_txq[i] = NULL;
1353 i = badtx % LMC_TXDESCS;
1356 if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1358 printk ("%s: out of sync pointer\n", dev->name);
1359 badtx += LMC_TXDESCS;
1361 LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1363 netif_wake_queue(dev);
1364 sc->extra_stats.tx_tbusy0++;
1368 sc->extra_stats.dirtyTx = badtx;
1369 sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1370 sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1372 sc->lmc_taint_tx = badtx;
1375 * Why was there a break here???
1377 } /* end handle transmit interrupt */
1379 if (csr & TULIP_STS_SYSERROR) {
1381 printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1382 error = csr>>23 & 0x7;
1385 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1388 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1391 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1394 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1398 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1399 LMC_EVENT_LOG(LMC_EVENT_RESET2,
1400 lmc_mii_readreg (sc, 0, 16),
1401 lmc_mii_readreg (sc, 0, 17));
1410 * Get current csr status to make sure
1411 * we've cleared all interrupts
1413 csr = LMC_CSR_READ (sc, csr_status);
1414 } /* end interrupt loop */
1415 LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1419 spin_unlock(&sc->lmc_lock);
1421 lmc_trace(dev, "lmc_interrupt out");
1422 return IRQ_RETVAL(handled);
1425 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1426 struct net_device *dev)
1428 lmc_softc_t *sc = dev_to_sc(dev);
1431 unsigned long flags;
1433 lmc_trace(dev, "lmc_start_xmit in");
1435 spin_lock_irqsave(&sc->lmc_lock, flags);
1437 /* normal path, tbusy known to be zero */
1439 entry = sc->lmc_next_tx % LMC_TXDESCS;
1441 sc->lmc_txq[entry] = skb;
1442 sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1444 LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1447 /* If the queue is less than half full, don't interrupt */
1448 if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1450 /* Do not interrupt on completion of this packet */
1452 netif_wake_queue(dev);
1454 else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1456 /* This generates an interrupt on completion of this packet */
1458 netif_wake_queue(dev);
1460 else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1462 /* Do not interrupt on completion of this packet */
1464 netif_wake_queue(dev);
1468 /* This generates an interrupt on completion of this packet */
1471 netif_stop_queue(dev);
1474 flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1476 if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1477 { /* ring full, go busy */
1479 netif_stop_queue(dev);
1480 sc->extra_stats.tx_tbusy1++;
1481 LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1486 if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */
1487 flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */
1489 /* don't pad small packets either */
1490 flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1491 sc->TxDescriptControlInit;
1493 /* set the transmit timeout flag to be checked in
1494 * the watchdog timer handler. -baz
1497 sc->extra_stats.tx_NoCompleteCnt++;
1500 /* give ownership to the chip */
1501 LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1502 sc->lmc_txring[entry].status = 0x80000000;
1505 LMC_CSR_WRITE (sc, csr_txpoll, 0);
1507 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1509 lmc_trace(dev, "lmc_start_xmit_out");
1510 return NETDEV_TX_OK;
1514 static int lmc_rx(struct net_device *dev)
1516 lmc_softc_t *sc = dev_to_sc(dev);
1518 int rx_work_limit = LMC_RXDESCS;
1519 unsigned int next_rx;
1520 int rxIntLoopCnt; /* debug -baz */
1521 int localLengthErrCnt = 0;
1523 struct sk_buff *skb, *nsb;
1526 lmc_trace(dev, "lmc_rx in");
1528 lmc_led_on(sc, LMC_DS3_LED3);
1530 rxIntLoopCnt = 0; /* debug -baz */
1532 i = sc->lmc_next_rx % LMC_RXDESCS;
1533 next_rx = sc->lmc_next_rx;
1535 while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1537 rxIntLoopCnt++; /* debug -baz */
1538 len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1539 if ((stat & 0x0300) != 0x0300) { /* Check first segment and last segment */
1540 if ((stat & 0x0000ffff) != 0x7fff) {
1541 /* Oversized frame */
1542 sc->lmc_device->stats.rx_length_errors++;
1547 if (stat & 0x00000008) { /* Catch a dribbling bit error */
1548 sc->lmc_device->stats.rx_errors++;
1549 sc->lmc_device->stats.rx_frame_errors++;
1554 if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1555 sc->lmc_device->stats.rx_errors++;
1556 sc->lmc_device->stats.rx_crc_errors++;
1560 if (len > LMC_PKT_BUF_SZ) {
1561 sc->lmc_device->stats.rx_length_errors++;
1562 localLengthErrCnt++;
1566 if (len < sc->lmc_crcSize + 2) {
1567 sc->lmc_device->stats.rx_length_errors++;
1568 sc->extra_stats.rx_SmallPktCnt++;
1569 localLengthErrCnt++;
1573 if(stat & 0x00004000){
1574 printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1577 len -= sc->lmc_crcSize;
1579 skb = sc->lmc_rxq[i];
1582 * We ran out of memory at some point
1583 * just allocate an skb buff and continue.
1587 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1589 sc->lmc_rxq[i] = nsb;
1591 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1593 sc->failed_recv_alloc = 1;
1597 sc->lmc_device->stats.rx_packets++;
1598 sc->lmc_device->stats.rx_bytes += len;
1600 LMC_CONSOLE_LOG("recv", skb->data, len);
1603 * I'm not sure of the sanity of this
1604 * Packets could be arriving at a constant
1605 * 44.210mbits/sec and we're going to copy
1606 * them into a new buffer??
1609 if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1611 * If it's a large packet don't copy it just hand it up
1615 sc->lmc_rxq[i] = NULL;
1616 sc->lmc_rxring[i].buffer1 = 0x0;
1619 skb->protocol = lmc_proto_type(sc, skb);
1620 skb_reset_mac_header(skb);
1621 /* skb_reset_network_header(skb); */
1623 lmc_proto_netif(sc, skb);
1626 * This skb will be destroyed by the upper layers, make a new one
1628 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1630 sc->lmc_rxq[i] = nsb;
1632 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1633 /* Transferred to 21140 below */
1637 * We've run out of memory, stop trying to allocate
1638 * memory and exit the interrupt handler
1640 * The chip may run out of receivers and stop
1641 * in which care we'll try to allocate the buffer
1642 * again. (once a second)
1644 sc->extra_stats.rx_BuffAllocErr++;
1645 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1646 sc->failed_recv_alloc = 1;
1647 goto skip_out_of_mem;
1651 nsb = dev_alloc_skb(len);
1653 goto give_it_anyways;
1655 skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1657 nsb->protocol = lmc_proto_type(sc, nsb);
1658 skb_reset_mac_header(nsb);
1659 /* skb_reset_network_header(nsb); */
1661 lmc_proto_netif(sc, nsb);
1665 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1666 sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1669 i = sc->lmc_next_rx % LMC_RXDESCS;
1671 if (rx_work_limit < 0)
1675 /* detect condition for LMC1000 where DSU cable attaches and fills
1676 * descriptors with bogus packets
1678 if (localLengthErrCnt > LMC_RXDESCS - 3) {
1679 sc->extra_stats.rx_BadPktSurgeCnt++;
1680 LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1681 sc->extra_stats.rx_BadPktSurgeCnt);
1684 /* save max count of receive descriptors serviced */
1685 if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1686 sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1689 if (rxIntLoopCnt == 0)
1691 for (i = 0; i < LMC_RXDESCS; i++)
1693 if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1694 != DESC_OWNED_BY_DC21X4)
1699 LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1704 lmc_led_off(sc, LMC_DS3_LED3);
1708 lmc_trace(dev, "lmc_rx out");
1713 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1715 lmc_softc_t *sc = dev_to_sc(dev);
1716 unsigned long flags;
1718 lmc_trace(dev, "lmc_get_stats in");
1720 spin_lock_irqsave(&sc->lmc_lock, flags);
1722 sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1724 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1726 lmc_trace(dev, "lmc_get_stats out");
1728 return &sc->lmc_device->stats;
1731 static struct pci_driver lmc_driver = {
1733 .id_table = lmc_pci_tbl,
1734 .probe = lmc_init_one,
1735 .remove = lmc_remove_one,
1738 module_pci_driver(lmc_driver);
1740 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1743 int command = (0xf6 << 10) | (devaddr << 5) | regno;
1746 lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1750 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1752 for (i = 15; i >= 0; i--)
1754 int dataval = (command & (1 << i)) ? 0x20000 : 0;
1756 LMC_CSR_WRITE (sc, csr_9, dataval);
1758 /* __SLOW_DOWN_IO; */
1759 LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1761 /* __SLOW_DOWN_IO; */
1764 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1766 for (i = 19; i > 0; i--)
1768 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1770 /* __SLOW_DOWN_IO; */
1771 retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1772 LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1774 /* __SLOW_DOWN_IO; */
1777 lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1779 return (retval >> 1) & 0xffff;
1782 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1785 int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1787 lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1796 if (command & (1 << i))
1801 LMC_CSR_WRITE (sc, csr_9, datav);
1803 /* __SLOW_DOWN_IO; */
1804 LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1806 /* __SLOW_DOWN_IO; */
1813 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1815 /* __SLOW_DOWN_IO; */
1816 LMC_CSR_WRITE (sc, csr_9, 0x50000);
1818 /* __SLOW_DOWN_IO; */
1822 lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1825 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1829 lmc_trace(sc->lmc_device, "lmc_softreset in");
1831 /* Initialize the receive rings and buffers. */
1833 sc->lmc_next_rx = 0;
1834 sc->lmc_next_tx = 0;
1835 sc->lmc_taint_rx = 0;
1836 sc->lmc_taint_tx = 0;
1839 * Setup each one of the receiver buffers
1840 * allocate an skbuff for each one, setup the descriptor table
1841 * and point each buffer at the next one
1844 for (i = 0; i < LMC_RXDESCS; i++)
1846 struct sk_buff *skb;
1848 if (sc->lmc_rxq[i] == NULL)
1850 skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1852 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1853 sc->failed_ring = 1;
1857 sc->lmc_rxq[i] = skb;
1862 skb = sc->lmc_rxq[i];
1865 skb->dev = sc->lmc_device;
1867 /* owned by 21140 */
1868 sc->lmc_rxring[i].status = 0x80000000;
1870 /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1871 sc->lmc_rxring[i].length = skb_tailroom(skb);
1873 /* use to be tail which is dumb since you're thinking why write
1874 * to the end of the packj,et but since there's nothing there tail == data
1876 sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1878 /* This is fair since the structure is static and we have the next address */
1879 sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1887 sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1888 sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1890 LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1892 /* Initialize the transmit rings and buffers */
1893 for (i = 0; i < LMC_TXDESCS; i++)
1895 if (sc->lmc_txq[i] != NULL){ /* have buffer */
1896 dev_kfree_skb(sc->lmc_txq[i]); /* free it */
1897 sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1899 sc->lmc_txq[i] = NULL;
1900 sc->lmc_txring[i].status = 0x00000000;
1901 sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1903 sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1904 LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1906 lmc_trace(sc->lmc_device, "lmc_softreset out");
1909 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1911 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1912 sc->lmc_gpio_io &= ~bits;
1913 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1914 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1917 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1919 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1920 sc->lmc_gpio_io |= bits;
1921 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1922 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1925 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1927 lmc_trace(sc->lmc_device, "lmc_led_on in");
1928 if((~sc->lmc_miireg16) & led){ /* Already on! */
1929 lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1933 sc->lmc_miireg16 &= ~led;
1934 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1935 lmc_trace(sc->lmc_device, "lmc_led_on out");
1938 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1940 lmc_trace(sc->lmc_device, "lmc_led_off in");
1941 if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1942 lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1946 sc->lmc_miireg16 |= led;
1947 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1948 lmc_trace(sc->lmc_device, "lmc_led_off out");
1951 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1953 lmc_trace(sc->lmc_device, "lmc_reset in");
1954 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1955 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1957 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1958 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1961 * make some of the GPIO pins be outputs
1963 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1966 * RESET low to force state reset. This also forces
1967 * the transmitter clock to be internal, but we expect to reset
1968 * that later anyway.
1970 sc->lmc_gpio &= ~(LMC_GEP_RESET);
1971 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1974 * hold for more than 10 microseconds
1979 * stop driving Xilinx-related signals
1981 lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1984 * Call media specific init routine
1986 sc->lmc_media->init(sc);
1988 sc->extra_stats.resetCount++;
1989 lmc_trace(sc->lmc_device, "lmc_reset out");
1992 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1995 lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1998 * disable all interrupts
2000 sc->lmc_intrmask = 0;
2001 LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
2004 * Reset the chip with a software reset command.
2005 * Wait 10 microseconds (actually 50 PCI cycles but at
2006 * 33MHz that comes to two microseconds but wait a
2007 * bit longer anyways)
2009 LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
2012 sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
2013 sc->lmc_busmode = 0x00100000;
2014 sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
2015 LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
2017 sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
2021 * no ethernet address in frames we write
2022 * disable padding (txdesc, padding disable)
2023 * ignore runt frames (rdes0 bit 15)
2024 * no receiver watchdog or transmitter jabber timer
2025 * (csr15 bit 0,14 == 1)
2026 * if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2029 sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2030 | TULIP_CMD_FULLDUPLEX
2031 | TULIP_CMD_PASSBADPKT
2032 | TULIP_CMD_NOHEARTBEAT
2033 | TULIP_CMD_PORTSELECT
2034 | TULIP_CMD_RECEIVEALL
2035 | TULIP_CMD_MUSTBEONE
2037 sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2038 | TULIP_CMD_THRESHOLDCTL
2039 | TULIP_CMD_STOREFWD
2040 | TULIP_CMD_TXTHRSHLDCTL
2043 LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2046 * disable receiver watchdog and transmit jabber
2048 val = LMC_CSR_READ(sc, csr_sia_general);
2049 val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2050 LMC_CSR_WRITE(sc, csr_sia_general, val);
2052 lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2055 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2058 lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2059 sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size;
2060 sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size;
2061 sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size;
2062 sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size;
2063 sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size;
2064 sc->lmc_csrs.csr_status = csr_base + 5 * csr_size;
2065 sc->lmc_csrs.csr_command = csr_base + 6 * csr_size;
2066 sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size;
2067 sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size;
2068 sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size;
2069 sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size;
2070 sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size;
2071 sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size;
2072 sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size;
2073 sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size;
2074 sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size;
2075 lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2078 static void lmc_driver_timeout(struct net_device *dev)
2080 lmc_softc_t *sc = dev_to_sc(dev);
2082 unsigned long flags;
2084 lmc_trace(dev, "lmc_driver_timeout in");
2086 spin_lock_irqsave(&sc->lmc_lock, flags);
2088 printk("%s: Xmitter busy|\n", dev->name);
2090 sc->extra_stats.tx_tbusy_calls++;
2091 if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2095 * Chip seems to have locked up
2097 * This whips out all our decriptor
2098 * table and starts from scartch
2101 LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2102 LMC_CSR_READ (sc, csr_status),
2103 sc->extra_stats.tx_ProcTimeout);
2105 lmc_running_reset (dev);
2107 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2108 LMC_EVENT_LOG(LMC_EVENT_RESET2,
2109 lmc_mii_readreg (sc, 0, 16),
2110 lmc_mii_readreg (sc, 0, 17));
2112 /* restart the tx processes */
2113 csr6 = LMC_CSR_READ (sc, csr_command);
2114 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2115 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2117 /* immediate transmit */
2118 LMC_CSR_WRITE (sc, csr_txpoll, 0);
2120 sc->lmc_device->stats.tx_errors++;
2121 sc->extra_stats.tx_ProcTimeout++; /* -baz */
2123 dev->trans_start = jiffies; /* prevent tx timeout */
2127 spin_unlock_irqrestore(&sc->lmc_lock, flags);
2129 lmc_trace(dev, "lmc_driver_timout out");