2 * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
3 * All rights reserved. www.lanmedia.com
4 * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
6 * This code is written by:
7 * Andrew Stanley-Jones (asj@cban.com)
8 * Rob Braun (bbraun@vix.com),
9 * Michael Graff (explorer@vix.com) and
10 * Matt Thomas (matt@3am-software.com).
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 struct pci_device_id 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 int lmc_start_xmit(struct sk_buff *skb, struct net_device *dev);
93 static int lmc_rx (struct net_device *dev);
94 static int lmc_open(struct net_device *dev);
95 static int lmc_close(struct net_device *dev);
96 static struct net_device_stats *lmc_get_stats(struct net_device *dev);
97 static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
98 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
99 static void lmc_softreset(lmc_softc_t * const);
100 static void lmc_running_reset(struct net_device *dev);
101 static int lmc_ifdown(struct net_device * const);
102 static void lmc_watchdog(unsigned long data);
103 static void lmc_reset(lmc_softc_t * const sc);
104 static void lmc_dec_reset(lmc_softc_t * const sc);
105 static void lmc_driver_timeout(struct net_device *dev);
108 * linux reserves 16 device specific IOCTLs. We call them
109 * LMCIOC* to control various bits of our world.
111 int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
113 lmc_softc_t *sc = dev_to_sc(dev);
115 int ret = -EOPNOTSUPP;
119 lmc_trace(dev, "lmc_ioctl in");
122 * Most functions mess with the structure
123 * Disable interrupts while we do the polling
128 * Return current driver state. Since we keep this up
129 * To date internally, just copy this out to the user.
131 case LMCIOCGINFO: /*fold01*/
132 if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
138 case LMCIOCSINFO: /*fold01*/
139 if (!capable(CAP_NET_ADMIN)) {
144 if(dev->flags & IFF_UP){
149 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
154 spin_lock_irqsave(&sc->lmc_lock, flags);
155 sc->lmc_media->set_status (sc, &ctl);
157 if(ctl.crc_length != sc->ictl.crc_length) {
158 sc->lmc_media->set_crc_length(sc, ctl.crc_length);
159 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
160 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
162 sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
164 spin_unlock_irqrestore(&sc->lmc_lock, flags);
169 case LMCIOCIFTYPE: /*fold01*/
171 u16 old_type = sc->if_type;
174 if (!capable(CAP_NET_ADMIN)) {
179 if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
185 if (new_type == old_type)
188 break; /* no change */
191 spin_lock_irqsave(&sc->lmc_lock, flags);
194 sc->if_type = new_type;
195 lmc_proto_attach(sc);
196 ret = lmc_proto_open(sc);
197 spin_unlock_irqrestore(&sc->lmc_lock, flags);
201 case LMCIOCGETXINFO: /*fold01*/
202 spin_lock_irqsave(&sc->lmc_lock, flags);
203 sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
205 sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
206 sc->lmc_xinfo.PciSlotNumber = 0;
207 sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
208 sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
209 sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
210 sc->lmc_xinfo.XilinxRevisionNumber =
211 lmc_mii_readreg (sc, 0, 3) & 0xf;
212 sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
213 sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
214 sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
215 spin_unlock_irqrestore(&sc->lmc_lock, flags);
217 sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
219 if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
220 sizeof(struct lmc_xinfo)))
227 case LMCIOCGETLMCSTATS:
228 spin_lock_irqsave(&sc->lmc_lock, flags);
229 if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
230 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
231 sc->extra_stats.framingBitErrorCount +=
232 lmc_mii_readreg(sc, 0, 18) & 0xff;
233 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
234 sc->extra_stats.framingBitErrorCount +=
235 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
236 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
237 sc->extra_stats.lineCodeViolationCount +=
238 lmc_mii_readreg(sc, 0, 18) & 0xff;
239 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
240 sc->extra_stats.lineCodeViolationCount +=
241 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
242 lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
243 regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
245 sc->extra_stats.lossOfFrameCount +=
246 (regVal & T1FRAMER_LOF_MASK) >> 4;
247 sc->extra_stats.changeOfFrameAlignmentCount +=
248 (regVal & T1FRAMER_COFA_MASK) >> 2;
249 sc->extra_stats.severelyErroredFrameCount +=
250 regVal & T1FRAMER_SEF_MASK;
252 spin_unlock_irqrestore(&sc->lmc_lock, flags);
253 if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
254 sizeof(sc->lmc_device->stats)) ||
255 copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
256 &sc->extra_stats, sizeof(sc->extra_stats)))
262 case LMCIOCCLEARLMCSTATS:
263 if (!capable(CAP_NET_ADMIN)) {
268 spin_lock_irqsave(&sc->lmc_lock, flags);
269 memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
270 memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
271 sc->extra_stats.check = STATCHECK;
272 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
273 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
274 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
275 spin_unlock_irqrestore(&sc->lmc_lock, flags);
279 case LMCIOCSETCIRCUIT: /*fold01*/
280 if (!capable(CAP_NET_ADMIN)){
285 if(dev->flags & IFF_UP){
290 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
294 spin_lock_irqsave(&sc->lmc_lock, flags);
295 sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
296 sc->ictl.circuit_type = ctl.circuit_type;
297 spin_unlock_irqrestore(&sc->lmc_lock, flags);
302 case LMCIOCRESET: /*fold01*/
303 if (!capable(CAP_NET_ADMIN)){
308 spin_lock_irqsave(&sc->lmc_lock, flags);
309 /* Reset driver and bring back to current state */
310 printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
311 lmc_running_reset (dev);
312 printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
314 LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
315 spin_unlock_irqrestore(&sc->lmc_lock, flags);
321 case LMCIOCDUMPEVENTLOG:
322 if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
326 if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
327 sizeof(lmcEventLogBuf)))
333 #endif /* end ifdef _DBG_EVENTLOG */
334 case LMCIOCT1CONTROL: /*fold01*/
335 if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
340 case LMCIOCXILINX: /*fold01*/
342 struct lmc_xilinx_control xc; /*fold02*/
344 if (!capable(CAP_NET_ADMIN)){
350 * Stop the xwitter whlie we restart the hardware
352 netif_stop_queue(dev);
354 if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
359 case lmc_xilinx_reset: /*fold02*/
362 spin_lock_irqsave(&sc->lmc_lock, flags);
363 mii = lmc_mii_readreg (sc, 0, 16);
366 * Make all of them 0 and make input
368 lmc_gpio_mkinput(sc, 0xff);
371 * make the reset output
373 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
376 * RESET low to force configuration. This also forces
377 * the transmitter clock to be internal, but we expect to reset
381 sc->lmc_gpio &= ~LMC_GEP_RESET;
382 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
386 * hold for more than 10 microseconds
390 sc->lmc_gpio |= LMC_GEP_RESET;
391 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
395 * stop driving Xilinx-related signals
397 lmc_gpio_mkinput(sc, 0xff);
399 /* Reset the frammer hardware */
400 sc->lmc_media->set_link_status (sc, 1);
401 sc->lmc_media->set_status (sc, NULL);
402 // lmc_softreset(sc);
406 for(i = 0; i < 5; i++){
407 lmc_led_on(sc, LMC_DS3_LED0);
409 lmc_led_off(sc, LMC_DS3_LED0);
410 lmc_led_on(sc, LMC_DS3_LED1);
412 lmc_led_off(sc, LMC_DS3_LED1);
413 lmc_led_on(sc, LMC_DS3_LED3);
415 lmc_led_off(sc, LMC_DS3_LED3);
416 lmc_led_on(sc, LMC_DS3_LED2);
418 lmc_led_off(sc, LMC_DS3_LED2);
421 spin_unlock_irqrestore(&sc->lmc_lock, flags);
430 case lmc_xilinx_load_prom: /*fold02*/
433 int timeout = 500000;
434 spin_lock_irqsave(&sc->lmc_lock, flags);
435 mii = lmc_mii_readreg (sc, 0, 16);
438 * Make all of them 0 and make input
440 lmc_gpio_mkinput(sc, 0xff);
443 * make the reset output
445 lmc_gpio_mkoutput(sc, LMC_GEP_DP | LMC_GEP_RESET);
448 * RESET low to force configuration. This also forces
449 * the transmitter clock to be internal, but we expect to reset
453 sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
454 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
458 * hold for more than 10 microseconds
462 sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
463 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
466 * busy wait for the chip to reset
468 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
474 * stop driving Xilinx-related signals
476 lmc_gpio_mkinput(sc, 0xff);
477 spin_unlock_irqrestore(&sc->lmc_lock, flags);
486 case lmc_xilinx_load: /*fold02*/
490 int timeout = 500000;
497 data = kmalloc(xc.len, GFP_KERNEL);
499 printk(KERN_WARNING "%s: Failed to allocate memory for copy\n", dev->name);
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 int __devinit lmc_init_one(struct pci_dev *pdev,
810 const struct pci_device_id *ent)
813 struct net_device *dev;
817 static int cards_found;
819 /* lmc_trace(dev, "lmc_init_one in"); */
821 err = pci_enable_device(pdev);
823 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
827 err = pci_request_regions(pdev, "lmc");
829 printk(KERN_ERR "lmc: pci_request_region failed\n");
834 * Allocate our own device structure
836 sc = kzalloc(sizeof(lmc_softc_t), GFP_KERNEL);
842 dev = alloc_hdlcdev(sc);
844 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
849 dev->type = ARPHRD_HDLC;
850 dev_to_hdlc(dev)->xmit = lmc_start_xmit;
851 dev_to_hdlc(dev)->attach = lmc_attach;
852 dev->open = lmc_open;
853 dev->stop = lmc_close;
854 dev->get_stats = lmc_get_stats;
855 dev->do_ioctl = lmc_ioctl;
856 dev->tx_timeout = lmc_driver_timeout;
857 dev->watchdog_timeo = HZ; /* 1 second */
858 dev->tx_queue_len = 100;
859 sc->lmc_device = dev;
860 sc->name = dev->name;
861 sc->if_type = LMC_PPP;
862 sc->check = 0xBEAFCAFE;
863 dev->base_addr = pci_resource_start(pdev, 0);
864 dev->irq = pdev->irq;
865 pci_set_drvdata(pdev, dev);
866 SET_NETDEV_DEV(dev, &pdev->dev);
869 * This will get the protocol layer ready and do any 1 time init's
870 * Must have a valid sc and dev structure
872 lmc_proto_attach(sc);
874 /* Init the spin lock so can call it latter */
876 spin_lock_init(&sc->lmc_lock);
877 pci_set_master(pdev);
879 printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
880 dev->base_addr, dev->irq);
882 err = register_hdlc_device(dev);
884 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
889 sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
890 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
894 * Check either the subvendor or the subdevice, some systems reverse
895 * the setting in the bois, seems to be version and arch dependent?
896 * Fix the error, exchange the two values
898 if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
899 subdevice = pdev->subsystem_vendor;
902 case PCI_DEVICE_ID_LMC_HSSI:
903 printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
904 sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
905 sc->lmc_media = &lmc_hssi_media;
907 case PCI_DEVICE_ID_LMC_DS3:
908 printk(KERN_INFO "%s: LMC DS3\n", dev->name);
909 sc->lmc_cardtype = LMC_CARDTYPE_DS3;
910 sc->lmc_media = &lmc_ds3_media;
912 case PCI_DEVICE_ID_LMC_SSI:
913 printk(KERN_INFO "%s: LMC SSI\n", dev->name);
914 sc->lmc_cardtype = LMC_CARDTYPE_SSI;
915 sc->lmc_media = &lmc_ssi_media;
917 case PCI_DEVICE_ID_LMC_T1:
918 printk(KERN_INFO "%s: LMC T1\n", dev->name);
919 sc->lmc_cardtype = LMC_CARDTYPE_T1;
920 sc->lmc_media = &lmc_t1_media;
923 printk(KERN_WARNING "%s: LMC UNKOWN CARD!\n", dev->name);
927 lmc_initcsrs (sc, dev->base_addr, 8);
929 lmc_gpio_mkinput (sc, 0xff);
930 sc->lmc_gpio = 0; /* drive no signals yet */
932 sc->lmc_media->defaults (sc);
934 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
936 /* verify that the PCI Sub System ID matches the Adapter Model number
937 * from the MII register
939 AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
941 if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
942 subdevice != PCI_DEVICE_ID_LMC_T1) &&
943 (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
944 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
945 (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
946 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
947 (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
948 subdevice != PCI_DEVICE_ID_LMC_HSSI))
949 printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
950 " Subsystem ID = 0x%04x\n",
951 dev->name, AdapModelNum, subdevice);
956 LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
958 sc->board_idx = cards_found++;
959 sc->extra_stats.check = STATCHECK;
960 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
961 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
962 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
965 sc->last_link_status = 0;
967 lmc_trace(dev, "lmc_init_one out");
971 pci_set_drvdata(pdev, NULL);
974 pci_release_regions(pdev);
976 pci_disable_device(pdev);
981 * Called from pci when removing module.
983 static void __devexit lmc_remove_one(struct pci_dev *pdev)
985 struct net_device *dev = pci_get_drvdata(pdev);
988 printk(KERN_DEBUG "%s: removing...\n", dev->name);
989 unregister_hdlc_device(dev);
991 pci_release_regions(pdev);
992 pci_disable_device(pdev);
993 pci_set_drvdata(pdev, NULL);
997 /* After this is called, packets can be sent.
998 * Does not initialize the addresses
1000 static int lmc_open(struct net_device *dev)
1002 lmc_softc_t *sc = dev_to_sc(dev);
1005 lmc_trace(dev, "lmc_open in");
1007 lmc_led_on(sc, LMC_DS3_LED0);
1012 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
1013 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
1014 lmc_mii_readreg(sc, 0, 17));
1017 lmc_trace(dev, "lmc_open lmc_ok out");
1023 /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1024 if (request_irq (dev->irq, &lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1025 printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1026 lmc_trace(dev, "lmc_open irq failed out");
1031 /* Assert Terminal Active */
1032 sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1033 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1036 * reset to last state.
1038 sc->lmc_media->set_status (sc, NULL);
1040 /* setup default bits to be used in tulip_desc_t transmit descriptor
1042 sc->TxDescriptControlInit = (
1043 LMC_TDES_INTERRUPT_ON_COMPLETION
1044 | LMC_TDES_FIRST_SEGMENT
1045 | LMC_TDES_LAST_SEGMENT
1046 | LMC_TDES_SECOND_ADDR_CHAINED
1047 | LMC_TDES_DISABLE_PADDING
1050 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1051 /* disable 32 bit CRC generated by ASIC */
1052 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1054 sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1055 /* Acknoledge the Terminal Active and light LEDs */
1057 /* dev->flags |= IFF_UP; */
1059 if ((err = lmc_proto_open(sc)) != 0)
1062 dev->do_ioctl = lmc_ioctl;
1065 netif_start_queue(dev);
1066 sc->extra_stats.tx_tbusy0++;
1069 * select what interrupts we want to get
1071 sc->lmc_intrmask = 0;
1072 /* Should be using the default interrupt mask defined in the .h file. */
1073 sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1076 | TULIP_STS_ABNRMLINTR
1077 | TULIP_STS_SYSERROR
1078 | TULIP_STS_TXSTOPPED
1079 | TULIP_STS_TXUNDERFLOW
1080 | TULIP_STS_RXSTOPPED
1083 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1085 sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1086 sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1087 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1089 sc->lmc_ok = 1; /* Run watchdog */
1092 * Set the if up now - pfb
1095 sc->last_link_status = 1;
1098 * Setup a timer for the watchdog on probe, and start it running.
1099 * Since lmc_ok == 0, it will be a NOP for now.
1101 init_timer (&sc->timer);
1102 sc->timer.expires = jiffies + HZ;
1103 sc->timer.data = (unsigned long) dev;
1104 sc->timer.function = &lmc_watchdog;
1105 add_timer (&sc->timer);
1107 lmc_trace(dev, "lmc_open out");
1112 /* Total reset to compensate for the AdTran DSU doing bad things
1116 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1118 lmc_softc_t *sc = dev_to_sc(dev);
1120 lmc_trace(dev, "lmc_runnig_reset in");
1122 /* stop interrupts */
1123 /* Clear the interrupt mask */
1124 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1129 /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1130 sc->lmc_media->set_link_status (sc, 1);
1131 sc->lmc_media->set_status (sc, NULL);
1133 netif_wake_queue(dev);
1136 sc->extra_stats.tx_tbusy0++;
1138 sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1139 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1141 sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1142 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1144 lmc_trace(dev, "lmc_runnin_reset_out");
1148 /* This is what is called when you ifconfig down a device.
1149 * This disables the timer for the watchdog and keepalives,
1150 * and disables the irq for dev.
1152 static int lmc_close(struct net_device *dev)
1154 /* not calling release_region() as we should */
1155 lmc_softc_t *sc = dev_to_sc(dev);
1157 lmc_trace(dev, "lmc_close in");
1160 sc->lmc_media->set_link_status (sc, 0);
1161 del_timer (&sc->timer);
1162 lmc_proto_close(sc);
1165 lmc_trace(dev, "lmc_close out");
1170 /* Ends the transfer of packets */
1171 /* When the interface goes down, this is called */
1172 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1174 lmc_softc_t *sc = dev_to_sc(dev);
1178 lmc_trace(dev, "lmc_ifdown in");
1180 /* Don't let anything else go on right now */
1182 netif_stop_queue(dev);
1183 sc->extra_stats.tx_tbusy1++;
1185 /* stop interrupts */
1186 /* Clear the interrupt mask */
1187 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1189 /* Stop Tx and Rx on the chip */
1190 csr6 = LMC_CSR_READ (sc, csr_command);
1191 csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */
1192 csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */
1193 LMC_CSR_WRITE (sc, csr_command, csr6);
1195 sc->lmc_device->stats.rx_missed_errors +=
1196 LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1198 /* release the interrupt */
1199 if(sc->got_irq == 1){
1200 free_irq (dev->irq, dev);
1204 /* free skbuffs in the Rx queue */
1205 for (i = 0; i < LMC_RXDESCS; i++)
1207 struct sk_buff *skb = sc->lmc_rxq[i];
1208 sc->lmc_rxq[i] = NULL;
1209 sc->lmc_rxring[i].status = 0;
1210 sc->lmc_rxring[i].length = 0;
1211 sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1214 sc->lmc_rxq[i] = NULL;
1217 for (i = 0; i < LMC_TXDESCS; i++)
1219 if (sc->lmc_txq[i] != NULL)
1220 dev_kfree_skb(sc->lmc_txq[i]);
1221 sc->lmc_txq[i] = NULL;
1224 lmc_led_off (sc, LMC_MII16_LED_ALL);
1226 netif_wake_queue(dev);
1227 sc->extra_stats.tx_tbusy0++;
1229 lmc_trace(dev, "lmc_ifdown out");
1234 /* Interrupt handling routine. This will take an incoming packet, or clean
1235 * up after a trasmit.
1237 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1239 struct net_device *dev = (struct net_device *) dev_instance;
1240 lmc_softc_t *sc = dev_to_sc(dev);
1246 int max_work = LMC_RXDESCS;
1249 lmc_trace(dev, "lmc_interrupt in");
1251 spin_lock(&sc->lmc_lock);
1254 * Read the csr to find what interrupts we have (if any)
1256 csr = LMC_CSR_READ (sc, csr_status);
1259 * Make sure this is our interrupt
1261 if ( ! (csr & sc->lmc_intrmask)) {
1262 goto lmc_int_fail_out;
1267 /* always go through this loop at least once */
1268 while (csr & sc->lmc_intrmask) {
1272 * Clear interrupt bits, we handle all case below
1274 LMC_CSR_WRITE (sc, csr_status, csr);
1278 * - Transmit process timed out CSR5<1>
1279 * - Transmit jabber timeout CSR5<3>
1280 * - Transmit underflow CSR5<5>
1281 * - Transmit Receiver buffer unavailable CSR5<7>
1282 * - Receive process stopped CSR5<8>
1283 * - Receive watchdog timeout CSR5<9>
1284 * - Early transmit interrupt CSR5<10>
1286 * Is this really right? Should we do a running reset for jabber?
1287 * (being a WAN card and all)
1289 if (csr & TULIP_STS_ABNRMLINTR){
1290 lmc_running_reset (dev);
1294 if (csr & TULIP_STS_RXINTR){
1295 lmc_trace(dev, "rx interrupt");
1299 if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1302 /* reset the transmit timeout detection flag -baz */
1303 sc->extra_stats.tx_NoCompleteCnt = 0;
1305 badtx = sc->lmc_taint_tx;
1306 i = badtx % LMC_TXDESCS;
1308 while ((badtx < sc->lmc_next_tx)) {
1309 stat = sc->lmc_txring[i].status;
1311 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1312 sc->lmc_txring[i].length);
1314 * If bit 31 is 1 the tulip owns it break out of the loop
1316 if (stat & 0x80000000)
1319 n_compl++ ; /* i.e., have an empty slot in ring */
1321 * If we have no skbuff or have cleared it
1322 * Already continue to the next buffer
1324 if (sc->lmc_txq[i] == NULL)
1328 * Check the total error summary to look for any errors
1330 if (stat & 0x8000) {
1331 sc->lmc_device->stats.tx_errors++;
1333 sc->lmc_device->stats.tx_aborted_errors++;
1335 sc->lmc_device->stats.tx_carrier_errors++;
1337 sc->lmc_device->stats.tx_window_errors++;
1339 sc->lmc_device->stats.tx_fifo_errors++;
1341 sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1343 sc->lmc_device->stats.tx_packets++;
1346 // dev_kfree_skb(sc->lmc_txq[i]);
1347 dev_kfree_skb_irq(sc->lmc_txq[i]);
1348 sc->lmc_txq[i] = NULL;
1351 i = badtx % LMC_TXDESCS;
1354 if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1356 printk ("%s: out of sync pointer\n", dev->name);
1357 badtx += LMC_TXDESCS;
1359 LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1361 netif_wake_queue(dev);
1362 sc->extra_stats.tx_tbusy0++;
1366 sc->extra_stats.dirtyTx = badtx;
1367 sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1368 sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1370 sc->lmc_taint_tx = badtx;
1373 * Why was there a break here???
1375 } /* end handle transmit interrupt */
1377 if (csr & TULIP_STS_SYSERROR) {
1379 printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1380 error = csr>>23 & 0x7;
1383 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1386 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1389 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1392 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1396 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1397 LMC_EVENT_LOG(LMC_EVENT_RESET2,
1398 lmc_mii_readreg (sc, 0, 16),
1399 lmc_mii_readreg (sc, 0, 17));
1408 * Get current csr status to make sure
1409 * we've cleared all interrupts
1411 csr = LMC_CSR_READ (sc, csr_status);
1412 } /* end interrupt loop */
1413 LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1417 spin_unlock(&sc->lmc_lock);
1419 lmc_trace(dev, "lmc_interrupt out");
1420 return IRQ_RETVAL(handled);
1423 static int lmc_start_xmit(struct sk_buff *skb, struct net_device *dev)
1425 lmc_softc_t *sc = dev_to_sc(dev);
1429 unsigned long flags;
1431 lmc_trace(dev, "lmc_start_xmit in");
1433 spin_lock_irqsave(&sc->lmc_lock, flags);
1435 /* normal path, tbusy known to be zero */
1437 entry = sc->lmc_next_tx % LMC_TXDESCS;
1439 sc->lmc_txq[entry] = skb;
1440 sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1442 LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1445 /* If the queue is less than half full, don't interrupt */
1446 if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1448 /* Do not interrupt on completion of this packet */
1450 netif_wake_queue(dev);
1452 else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1454 /* This generates an interrupt on completion of this packet */
1456 netif_wake_queue(dev);
1458 else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1460 /* Do not interrupt on completion of this packet */
1462 netif_wake_queue(dev);
1466 /* This generates an interrupt on completion of this packet */
1469 netif_stop_queue(dev);
1472 flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1474 if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1475 { /* ring full, go busy */
1477 netif_stop_queue(dev);
1478 sc->extra_stats.tx_tbusy1++;
1479 LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1484 if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */
1485 flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */
1487 /* don't pad small packets either */
1488 flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1489 sc->TxDescriptControlInit;
1491 /* set the transmit timeout flag to be checked in
1492 * the watchdog timer handler. -baz
1495 sc->extra_stats.tx_NoCompleteCnt++;
1498 /* give ownership to the chip */
1499 LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1500 sc->lmc_txring[entry].status = 0x80000000;
1503 LMC_CSR_WRITE (sc, csr_txpoll, 0);
1505 dev->trans_start = jiffies;
1507 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1509 lmc_trace(dev, "lmc_start_xmit_out");
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 dev->last_rx = jiffies;
1598 sc->lmc_device->stats.rx_packets++;
1599 sc->lmc_device->stats.rx_bytes += len;
1601 LMC_CONSOLE_LOG("recv", skb->data, len);
1604 * I'm not sure of the sanity of this
1605 * Packets could be arriving at a constant
1606 * 44.210mbits/sec and we're going to copy
1607 * them into a new buffer??
1610 if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1612 * If it's a large packet don't copy it just hand it up
1616 sc->lmc_rxq[i] = NULL;
1617 sc->lmc_rxring[i].buffer1 = 0x0;
1620 skb->protocol = lmc_proto_type(sc, skb);
1621 skb_reset_mac_header(skb);
1622 /* skb_reset_network_header(skb); */
1624 lmc_proto_netif(sc, skb);
1627 * This skb will be destroyed by the upper layers, make a new one
1629 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1631 sc->lmc_rxq[i] = nsb;
1633 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1634 /* Transferred to 21140 below */
1638 * We've run out of memory, stop trying to allocate
1639 * memory and exit the interrupt handler
1641 * The chip may run out of receivers and stop
1642 * in which care we'll try to allocate the buffer
1643 * again. (once a second)
1645 sc->extra_stats.rx_BuffAllocErr++;
1646 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1647 sc->failed_recv_alloc = 1;
1648 goto skip_out_of_mem;
1652 nsb = dev_alloc_skb(len);
1654 goto give_it_anyways;
1656 skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1658 nsb->protocol = lmc_proto_type(sc, skb);
1659 skb_reset_mac_header(nsb);
1660 /* skb_reset_network_header(nsb); */
1662 lmc_proto_netif(sc, nsb);
1666 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1667 sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1670 i = sc->lmc_next_rx % LMC_RXDESCS;
1672 if (rx_work_limit < 0)
1676 /* detect condition for LMC1000 where DSU cable attaches and fills
1677 * descriptors with bogus packets
1679 if (localLengthErrCnt > LMC_RXDESCS - 3) {
1680 sc->extra_stats.rx_BadPktSurgeCnt++;
1681 LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1682 sc->extra_stats.rx_BadPktSurgeCnt);
1685 /* save max count of receive descriptors serviced */
1686 if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1687 sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1690 if (rxIntLoopCnt == 0)
1692 for (i = 0; i < LMC_RXDESCS; i++)
1694 if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1695 != DESC_OWNED_BY_DC21X4)
1700 LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1705 lmc_led_off(sc, LMC_DS3_LED3);
1709 lmc_trace(dev, "lmc_rx out");
1714 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1716 lmc_softc_t *sc = dev_to_sc(dev);
1717 unsigned long flags;
1719 lmc_trace(dev, "lmc_get_stats in");
1721 spin_lock_irqsave(&sc->lmc_lock, flags);
1723 sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1725 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1727 lmc_trace(dev, "lmc_get_stats out");
1729 return &sc->lmc_device->stats;
1732 static struct pci_driver lmc_driver = {
1734 .id_table = lmc_pci_tbl,
1735 .probe = lmc_init_one,
1736 .remove = __devexit_p(lmc_remove_one),
1739 static int __init init_lmc(void)
1741 return pci_register_driver(&lmc_driver);
1744 static void __exit exit_lmc(void)
1746 pci_unregister_driver(&lmc_driver);
1749 module_init(init_lmc);
1750 module_exit(exit_lmc);
1752 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1755 int command = (0xf6 << 10) | (devaddr << 5) | regno;
1758 lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1762 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1764 for (i = 15; i >= 0; i--)
1766 int dataval = (command & (1 << i)) ? 0x20000 : 0;
1768 LMC_CSR_WRITE (sc, csr_9, dataval);
1770 /* __SLOW_DOWN_IO; */
1771 LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1773 /* __SLOW_DOWN_IO; */
1776 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1778 for (i = 19; i > 0; i--)
1780 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1782 /* __SLOW_DOWN_IO; */
1783 retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1784 LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1786 /* __SLOW_DOWN_IO; */
1789 lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1791 return (retval >> 1) & 0xffff;
1794 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1797 int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1799 lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1808 if (command & (1 << i))
1813 LMC_CSR_WRITE (sc, csr_9, datav);
1815 /* __SLOW_DOWN_IO; */
1816 LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1818 /* __SLOW_DOWN_IO; */
1825 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1827 /* __SLOW_DOWN_IO; */
1828 LMC_CSR_WRITE (sc, csr_9, 0x50000);
1830 /* __SLOW_DOWN_IO; */
1834 lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1837 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1841 lmc_trace(sc->lmc_device, "lmc_softreset in");
1843 /* Initialize the receive rings and buffers. */
1845 sc->lmc_next_rx = 0;
1846 sc->lmc_next_tx = 0;
1847 sc->lmc_taint_rx = 0;
1848 sc->lmc_taint_tx = 0;
1851 * Setup each one of the receiver buffers
1852 * allocate an skbuff for each one, setup the descriptor table
1853 * and point each buffer at the next one
1856 for (i = 0; i < LMC_RXDESCS; i++)
1858 struct sk_buff *skb;
1860 if (sc->lmc_rxq[i] == NULL)
1862 skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1864 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1865 sc->failed_ring = 1;
1869 sc->lmc_rxq[i] = skb;
1874 skb = sc->lmc_rxq[i];
1877 skb->dev = sc->lmc_device;
1879 /* owned by 21140 */
1880 sc->lmc_rxring[i].status = 0x80000000;
1882 /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1883 sc->lmc_rxring[i].length = skb_tailroom(skb);
1885 /* use to be tail which is dumb since you're thinking why write
1886 * to the end of the packj,et but since there's nothing there tail == data
1888 sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1890 /* This is fair since the structure is static and we have the next address */
1891 sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1898 sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1899 sc->lmc_rxring[i - 1].buffer2 = virt_to_bus (&sc->lmc_rxring[0]); /* Point back to the start */
1900 LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1903 /* Initialize the transmit rings and buffers */
1904 for (i = 0; i < LMC_TXDESCS; i++)
1906 if (sc->lmc_txq[i] != NULL){ /* have buffer */
1907 dev_kfree_skb(sc->lmc_txq[i]); /* free it */
1908 sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1910 sc->lmc_txq[i] = NULL;
1911 sc->lmc_txring[i].status = 0x00000000;
1912 sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1914 sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1915 LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1917 lmc_trace(sc->lmc_device, "lmc_softreset out");
1920 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1922 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1923 sc->lmc_gpio_io &= ~bits;
1924 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1925 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1928 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1930 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1931 sc->lmc_gpio_io |= bits;
1932 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1933 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1936 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1938 lmc_trace(sc->lmc_device, "lmc_led_on in");
1939 if((~sc->lmc_miireg16) & led){ /* Already on! */
1940 lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1944 sc->lmc_miireg16 &= ~led;
1945 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1946 lmc_trace(sc->lmc_device, "lmc_led_on out");
1949 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1951 lmc_trace(sc->lmc_device, "lmc_led_off in");
1952 if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1953 lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1957 sc->lmc_miireg16 |= led;
1958 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1959 lmc_trace(sc->lmc_device, "lmc_led_off out");
1962 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1964 lmc_trace(sc->lmc_device, "lmc_reset in");
1965 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1966 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1968 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1969 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1972 * make some of the GPIO pins be outputs
1974 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1977 * RESET low to force state reset. This also forces
1978 * the transmitter clock to be internal, but we expect to reset
1979 * that later anyway.
1981 sc->lmc_gpio &= ~(LMC_GEP_RESET);
1982 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1985 * hold for more than 10 microseconds
1990 * stop driving Xilinx-related signals
1992 lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1995 * Call media specific init routine
1997 sc->lmc_media->init(sc);
1999 sc->extra_stats.resetCount++;
2000 lmc_trace(sc->lmc_device, "lmc_reset out");
2003 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
2006 lmc_trace(sc->lmc_device, "lmc_dec_reset in");
2009 * disable all interrupts
2011 sc->lmc_intrmask = 0;
2012 LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
2015 * Reset the chip with a software reset command.
2016 * Wait 10 microseconds (actually 50 PCI cycles but at
2017 * 33MHz that comes to two microseconds but wait a
2018 * bit longer anyways)
2020 LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
2023 sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
2024 sc->lmc_busmode = 0x00100000;
2025 sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
2026 LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
2028 sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
2032 * no ethernet address in frames we write
2033 * disable padding (txdesc, padding disable)
2034 * ignore runt frames (rdes0 bit 15)
2035 * no receiver watchdog or transmitter jabber timer
2036 * (csr15 bit 0,14 == 1)
2037 * if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2040 sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2041 | TULIP_CMD_FULLDUPLEX
2042 | TULIP_CMD_PASSBADPKT
2043 | TULIP_CMD_NOHEARTBEAT
2044 | TULIP_CMD_PORTSELECT
2045 | TULIP_CMD_RECEIVEALL
2046 | TULIP_CMD_MUSTBEONE
2048 sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2049 | TULIP_CMD_THRESHOLDCTL
2050 | TULIP_CMD_STOREFWD
2051 | TULIP_CMD_TXTHRSHLDCTL
2054 LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2057 * disable receiver watchdog and transmit jabber
2059 val = LMC_CSR_READ(sc, csr_sia_general);
2060 val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2061 LMC_CSR_WRITE(sc, csr_sia_general, val);
2063 lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2066 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2069 lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2070 sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size;
2071 sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size;
2072 sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size;
2073 sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size;
2074 sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size;
2075 sc->lmc_csrs.csr_status = csr_base + 5 * csr_size;
2076 sc->lmc_csrs.csr_command = csr_base + 6 * csr_size;
2077 sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size;
2078 sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size;
2079 sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size;
2080 sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size;
2081 sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size;
2082 sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size;
2083 sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size;
2084 sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size;
2085 sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size;
2086 lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2089 static void lmc_driver_timeout(struct net_device *dev)
2091 lmc_softc_t *sc = dev_to_sc(dev);
2093 unsigned long flags;
2095 lmc_trace(dev, "lmc_driver_timeout in");
2097 spin_lock_irqsave(&sc->lmc_lock, flags);
2099 printk("%s: Xmitter busy|\n", dev->name);
2101 sc->extra_stats.tx_tbusy_calls++;
2102 if (jiffies - dev->trans_start < TX_TIMEOUT)
2106 * Chip seems to have locked up
2108 * This whips out all our decriptor
2109 * table and starts from scartch
2112 LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2113 LMC_CSR_READ (sc, csr_status),
2114 sc->extra_stats.tx_ProcTimeout);
2116 lmc_running_reset (dev);
2118 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2119 LMC_EVENT_LOG(LMC_EVENT_RESET2,
2120 lmc_mii_readreg (sc, 0, 16),
2121 lmc_mii_readreg (sc, 0, 17));
2123 /* restart the tx processes */
2124 csr6 = LMC_CSR_READ (sc, csr_command);
2125 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2126 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2128 /* immediate transmit */
2129 LMC_CSR_WRITE (sc, csr_txpoll, 0);
2131 sc->lmc_device->stats.tx_errors++;
2132 sc->extra_stats.tx_ProcTimeout++; /* -baz */
2134 dev->trans_start = jiffies;
2138 spin_unlock_irqrestore(&sc->lmc_lock, flags);
2140 lmc_trace(dev, "lmc_driver_timout out");