2 * Lance ethernet driver for the MIPS processor based
6 * adopted from sunlance.c by Richard van den Berg
8 * Copyright (C) 2002, 2003, 2005 Maciej W. Rozycki
11 * - PMAD-AA TURBOchannel Ethernet Module Functional Specification,
16 * v0.001: The kernel accepts the code and it shows the hardware address.
18 * v0.002: Removed most sparc stuff, left only some module and dma stuff.
20 * v0.003: Enhanced base address calculation from proposals by
21 * Harald Koerfgen and Thomas Riemer.
23 * v0.004: lance-regs is pointing at the right addresses, added prom
24 * check. First start of address mapping and DMA.
26 * v0.005: started to play around with LANCE-DMA. This driver will not
27 * work for non IOASIC lances. HK
29 * v0.006: added pointer arrays to lance_private and setup routine for
30 * them in dec_lance_init. HK
32 * v0.007: Big shit. The LANCE seems to use a different DMA mechanism to
33 * access the init block. This looks like one (short) word at a
34 * time, but the smallest amount the IOASIC can transfer is a
35 * (long) word. So we have a 2-2 padding here. Changed
36 * lance_init_block accordingly. The 16-16 padding for the buffers
37 * seems to be correct. HK
39 * v0.008: mods to make PMAX_LANCE work. 01/09/1999 triemer
41 * v0.009: Module support fixes, multiple interfaces support, various
45 #include <linux/crc32.h>
46 #include <linux/delay.h>
47 #include <linux/errno.h>
48 #include <linux/if_ether.h>
49 #include <linux/init.h>
50 #include <linux/kernel.h>
51 #include <linux/module.h>
52 #include <linux/netdevice.h>
53 #include <linux/etherdevice.h>
54 #include <linux/spinlock.h>
55 #include <linux/stddef.h>
56 #include <linux/string.h>
58 #include <asm/addrspace.h>
59 #include <asm/system.h>
61 #include <asm/dec/interrupts.h>
62 #include <asm/dec/ioasic.h>
63 #include <asm/dec/ioasic_addrs.h>
64 #include <asm/dec/kn01.h>
65 #include <asm/dec/machtype.h>
66 #include <asm/dec/system.h>
67 #include <asm/dec/tc.h>
69 static char version[] __devinitdata =
70 "declance.c: v0.009 by Linux MIPS DECstation task force\n";
72 MODULE_AUTHOR("Linux MIPS DECstation task force");
73 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
74 MODULE_LICENSE("GPL");
89 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
91 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
92 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
93 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
94 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
95 #define LE_C0_MERR 0x0800 /* ME: Memory error */
96 #define LE_C0_RINT 0x0400 /* Received interrupt */
97 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
98 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
99 #define LE_C0_INTR 0x0080 /* Interrupt or error */
100 #define LE_C0_INEA 0x0040 /* Interrupt enable */
101 #define LE_C0_RXON 0x0020 /* Receiver on */
102 #define LE_C0_TXON 0x0010 /* Transmitter on */
103 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
104 #define LE_C0_STOP 0x0004 /* Stop the card */
105 #define LE_C0_STRT 0x0002 /* Start the card */
106 #define LE_C0_INIT 0x0001 /* Init the card */
108 #define LE_C3_BSWP 0x4 /* SWAP */
109 #define LE_C3_ACON 0x2 /* ALE Control */
110 #define LE_C3_BCON 0x1 /* Byte control */
112 /* Receive message descriptor 1 */
113 #define LE_R1_OWN 0x80 /* Who owns the entry */
114 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
115 #define LE_R1_FRA 0x20 /* FRA: Frame error */
116 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
117 #define LE_R1_CRC 0x08 /* CRC error */
118 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
119 #define LE_R1_SOP 0x02 /* Start of packet */
120 #define LE_R1_EOP 0x01 /* End of packet */
121 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
123 #define LE_T1_OWN 0x80 /* Lance owns the packet */
124 #define LE_T1_ERR 0x40 /* Error summary */
125 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
126 #define LE_T1_EONE 0x08 /* Error: one retry needed */
127 #define LE_T1_EDEF 0x04 /* Error: deferred */
128 #define LE_T1_SOP 0x02 /* Start of packet */
129 #define LE_T1_EOP 0x01 /* End of packet */
130 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
132 #define LE_T3_BUF 0x8000 /* Buffer error */
133 #define LE_T3_UFL 0x4000 /* Error underflow */
134 #define LE_T3_LCOL 0x1000 /* Error late collision */
135 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
136 #define LE_T3_RTY 0x0400 /* Error retry */
137 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
139 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
141 #ifndef LANCE_LOG_TX_BUFFERS
142 #define LANCE_LOG_TX_BUFFERS 4
143 #define LANCE_LOG_RX_BUFFERS 4
146 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
147 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
149 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
150 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
152 #define PKT_BUF_SZ 1536
153 #define RX_BUFF_SIZE PKT_BUF_SZ
154 #define TX_BUFF_SIZE PKT_BUF_SZ
159 /* The DS2000/3000 have a linear 64 KB buffer.
161 * The PMAD-AA has 128 kb buffer on-board.
163 * The IOASIC LANCE devices use a shared memory region. This region as seen
164 * from the CPU is (max) 128 KB long and has to be on an 128 KB boundary.
165 * The LANCE sees this as a 64 KB long continuous memory region.
167 * The LANCE's DMA address is used as an index in this buffer and DMA takes
168 * place in bursts of eight 16-Bit words which are packed into four 32-Bit words
169 * by the IOASIC. This leads to a strange padding: 16 bytes of valid data followed
170 * by a 16 byte gap :-(.
173 struct lance_rx_desc {
174 unsigned short rmd0; /* low address of packet */
176 unsigned char rmd1_hadr; /* high address of packet */
177 unsigned char rmd1_bits; /* descriptor bits */
179 short length; /* 2s complement (negative!)
182 unsigned short mblength; /* actual number of bytes received */
186 struct lance_tx_desc {
187 unsigned short tmd0; /* low address of packet */
189 unsigned char tmd1_hadr; /* high address of packet */
190 unsigned char tmd1_bits; /* descriptor bits */
192 short length; /* 2s complement (negative!)
200 /* First part of the LANCE initialization block, described in databook. */
201 struct lance_init_block {
202 unsigned short mode; /* pre-set mode (reg. 15) */
205 unsigned char phys_addr[12]; /* physical ethernet address
206 only 0, 1, 4, 5, 8, 9 are valid
207 2, 3, 6, 7, 10, 11 are gaps */
208 unsigned short filter[8]; /* multicast filter
209 only 0, 2, 4, 6 are valid
210 1, 3, 5, 7 are gaps */
212 /* Receive and transmit ring base, along with extra bits. */
213 unsigned short rx_ptr; /* receive descriptor addr */
215 unsigned short rx_len; /* receive len and high addr */
217 unsigned short tx_ptr; /* transmit descriptor addr */
219 unsigned short tx_len; /* transmit len and high addr */
223 /* The buffer descriptors */
224 struct lance_rx_desc brx_ring[RX_RING_SIZE];
225 struct lance_tx_desc btx_ring[TX_RING_SIZE];
228 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
229 #define BUF_OFFSET_LNC (sizeof(struct lance_init_block)>>1)
231 #define libdesc_offset(rt, elem) \
232 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
235 * This works *only* for the ring descriptors
237 #define LANCE_ADDR(x) (CPHYSADDR(x) >> 1)
239 struct lance_private {
240 struct net_device *next;
244 volatile struct lance_regs *ll;
245 volatile struct lance_init_block *init_block;
252 struct net_device_stats stats;
254 unsigned short busmaster_regval;
256 struct timer_list multicast_timer;
258 /* Pointers to the ring buffers as seen from the CPU */
259 char *rx_buf_ptr_cpu[RX_RING_SIZE];
260 char *tx_buf_ptr_cpu[TX_RING_SIZE];
262 /* Pointers to the ring buffers as seen from the LANCE */
263 char *rx_buf_ptr_lnc[RX_RING_SIZE];
264 char *tx_buf_ptr_lnc[TX_RING_SIZE];
267 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
268 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
269 lp->tx_old - lp->tx_new-1)
271 /* The lance control ports are at an absolute address, machine and tc-slot
273 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
274 * so we have to give the structure an extra member making rap pointing
275 * at the right address
278 volatile unsigned short rdp; /* register data port */
280 volatile unsigned short rap; /* register address port */
283 int dec_lance_debug = 2;
285 static struct net_device *root_lance_dev;
287 static inline void writereg(volatile unsigned short *regptr, short value)
293 /* Load the CSR registers */
294 static void load_csrs(struct lance_private *lp)
296 volatile struct lance_regs *ll = lp->ll;
299 /* The address space as seen from the LANCE
300 * begins at address 0. HK
304 writereg(&ll->rap, LE_CSR1);
305 writereg(&ll->rdp, (leptr & 0xFFFF));
306 writereg(&ll->rap, LE_CSR2);
307 writereg(&ll->rdp, leptr >> 16);
308 writereg(&ll->rap, LE_CSR3);
309 writereg(&ll->rdp, lp->busmaster_regval);
311 /* Point back to csr0 */
312 writereg(&ll->rap, LE_CSR0);
316 * Our specialized copy routines
319 void cp_to_buf(const int type, void *to, const void *from, int len)
321 unsigned short *tp, *fp, clen;
322 unsigned char *rtp, *rfp;
324 if (type == PMAX_LANCE) {
326 tp = (unsigned short *) to;
327 fp = (unsigned short *) from;
335 rtp = (unsigned char *) tp;
336 rfp = (unsigned char *) fp;
342 * copy 16 Byte chunks
345 tp = (unsigned short *) to;
346 fp = (unsigned short *) from;
360 * do the rest, if any.
363 rtp = (unsigned char *) tp;
364 rfp = (unsigned char *) fp;
373 void cp_from_buf(const int type, void *to, const void *from, int len)
375 unsigned short *tp, *fp, clen;
376 unsigned char *rtp, *rfp;
378 if (type == PMAX_LANCE) {
380 tp = (unsigned short *) to;
381 fp = (unsigned short *) from;
389 rtp = (unsigned char *) tp;
390 rfp = (unsigned char *) fp;
398 * copy 16 Byte chunks
401 tp = (unsigned short *) to;
402 fp = (unsigned short *) from;
416 * do the rest, if any.
419 rtp = (unsigned char *) tp;
420 rfp = (unsigned char *) fp;
430 /* Setup the Lance Rx and Tx rings */
431 static void lance_init_ring(struct net_device *dev)
433 struct lance_private *lp = netdev_priv(dev);
434 volatile struct lance_init_block *ib;
438 ib = (struct lance_init_block *) (dev->mem_start);
440 /* Lock out other processes while setting up hardware */
441 netif_stop_queue(dev);
442 lp->rx_new = lp->tx_new = 0;
443 lp->rx_old = lp->tx_old = 0;
445 /* Copy the ethernet address to the lance init block.
446 * XXX bit 0 of the physical address registers has to be zero
448 ib->phys_addr[0] = dev->dev_addr[0];
449 ib->phys_addr[1] = dev->dev_addr[1];
450 ib->phys_addr[4] = dev->dev_addr[2];
451 ib->phys_addr[5] = dev->dev_addr[3];
452 ib->phys_addr[8] = dev->dev_addr[4];
453 ib->phys_addr[9] = dev->dev_addr[5];
454 /* Setup the initialization block */
456 /* Setup rx descriptor pointer */
457 leptr = LANCE_ADDR(libdesc_offset(brx_ring, 0));
458 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
461 printk("RX ptr: %8.8x(%8.8x)\n", leptr, libdesc_offset(brx_ring, 0));
463 /* Setup tx descriptor pointer */
464 leptr = LANCE_ADDR(libdesc_offset(btx_ring, 0));
465 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
468 printk("TX ptr: %8.8x(%8.8x)\n", leptr, libdesc_offset(btx_ring, 0));
471 printk("TX rings:\n");
473 /* Setup the Tx ring entries */
474 for (i = 0; i < TX_RING_SIZE; i++) {
475 leptr = (int) lp->tx_buf_ptr_lnc[i];
476 ib->btx_ring[i].tmd0 = leptr;
477 ib->btx_ring[i].tmd1_hadr = leptr >> 16;
478 ib->btx_ring[i].tmd1_bits = 0;
479 ib->btx_ring[i].length = 0xf000; /* The ones required by tmd2 */
480 ib->btx_ring[i].misc = 0;
482 printk("%d: 0x%8.8x(0x%8.8x)\n", i, leptr, (int) lp->tx_buf_ptr_cpu[i]);
485 /* Setup the Rx ring entries */
487 printk("RX rings:\n");
488 for (i = 0; i < RX_RING_SIZE; i++) {
489 leptr = (int) lp->rx_buf_ptr_lnc[i];
490 ib->brx_ring[i].rmd0 = leptr;
491 ib->brx_ring[i].rmd1_hadr = leptr >> 16;
492 ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
493 ib->brx_ring[i].length = -RX_BUFF_SIZE | 0xf000;
494 ib->brx_ring[i].mblength = 0;
496 printk("%d: 0x%8.8x(0x%8.8x)\n", i, leptr, (int) lp->rx_buf_ptr_cpu[i]);
501 static int init_restart_lance(struct lance_private *lp)
503 volatile struct lance_regs *ll = lp->ll;
506 writereg(&ll->rap, LE_CSR0);
507 writereg(&ll->rdp, LE_C0_INIT);
509 /* Wait for the lance to complete initialization */
510 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
513 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
514 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, ll->rdp);
517 if ((ll->rdp & LE_C0_ERR)) {
518 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, ll->rdp);
521 writereg(&ll->rdp, LE_C0_IDON);
522 writereg(&ll->rdp, LE_C0_STRT);
523 writereg(&ll->rdp, LE_C0_INEA);
528 static int lance_rx(struct net_device *dev)
530 struct lance_private *lp = netdev_priv(dev);
531 volatile struct lance_init_block *ib;
532 volatile struct lance_rx_desc *rd = 0;
535 struct sk_buff *skb = 0;
536 ib = (struct lance_init_block *) (dev->mem_start);
543 for (i = 0; i < RX_RING_SIZE; i++) {
545 printk("%s", ib->brx_ring[i].rmd1_bits &
546 LE_R1_OWN ? "_" : "X");
548 printk("%s", ib->brx_ring[i].rmd1_bits &
549 LE_R1_OWN ? "." : "1");
555 for (rd = &ib->brx_ring[lp->rx_new];
556 !((bits = rd->rmd1_bits) & LE_R1_OWN);
557 rd = &ib->brx_ring[lp->rx_new]) {
559 /* We got an incomplete frame? */
560 if ((bits & LE_R1_POK) != LE_R1_POK) {
561 lp->stats.rx_over_errors++;
562 lp->stats.rx_errors++;
563 } else if (bits & LE_R1_ERR) {
564 /* Count only the end frame as a rx error,
567 if (bits & LE_R1_BUF)
568 lp->stats.rx_fifo_errors++;
569 if (bits & LE_R1_CRC)
570 lp->stats.rx_crc_errors++;
571 if (bits & LE_R1_OFL)
572 lp->stats.rx_over_errors++;
573 if (bits & LE_R1_FRA)
574 lp->stats.rx_frame_errors++;
575 if (bits & LE_R1_EOP)
576 lp->stats.rx_errors++;
578 len = (rd->mblength & 0xfff) - 4;
579 skb = dev_alloc_skb(len + 2);
582 printk("%s: Memory squeeze, deferring packet.\n",
584 lp->stats.rx_dropped++;
586 rd->rmd1_bits = LE_R1_OWN;
587 lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
590 lp->stats.rx_bytes += len;
593 skb_reserve(skb, 2); /* 16 byte align */
594 skb_put(skb, len); /* make room */
596 cp_from_buf(lp->type, skb->data,
597 (char *)lp->rx_buf_ptr_cpu[lp->rx_new],
600 skb->protocol = eth_type_trans(skb, dev);
602 dev->last_rx = jiffies;
603 lp->stats.rx_packets++;
606 /* Return the packet to the pool */
608 rd->length = -RX_BUFF_SIZE | 0xf000;
609 rd->rmd1_bits = LE_R1_OWN;
610 lp->rx_new = (lp->rx_new + 1) & RX_RING_MOD_MASK;
615 static void lance_tx(struct net_device *dev)
617 struct lance_private *lp = netdev_priv(dev);
618 volatile struct lance_init_block *ib;
619 volatile struct lance_regs *ll = lp->ll;
620 volatile struct lance_tx_desc *td;
623 ib = (struct lance_init_block *) (dev->mem_start);
626 spin_lock(&lp->lock);
628 for (i = j; i != lp->tx_new; i = j) {
629 td = &ib->btx_ring[i];
630 /* If we hit a packet not owned by us, stop */
631 if (td->tmd1_bits & LE_T1_OWN)
634 if (td->tmd1_bits & LE_T1_ERR) {
637 lp->stats.tx_errors++;
638 if (status & LE_T3_RTY)
639 lp->stats.tx_aborted_errors++;
640 if (status & LE_T3_LCOL)
641 lp->stats.tx_window_errors++;
643 if (status & LE_T3_CLOS) {
644 lp->stats.tx_carrier_errors++;
645 printk("%s: Carrier Lost\n", dev->name);
647 writereg(&ll->rap, LE_CSR0);
648 writereg(&ll->rdp, LE_C0_STOP);
649 lance_init_ring(dev);
651 init_restart_lance(lp);
654 /* Buffer errors and underflows turn off the
655 * transmitter, restart the adapter.
657 if (status & (LE_T3_BUF | LE_T3_UFL)) {
658 lp->stats.tx_fifo_errors++;
660 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
663 writereg(&ll->rap, LE_CSR0);
664 writereg(&ll->rdp, LE_C0_STOP);
665 lance_init_ring(dev);
667 init_restart_lance(lp);
670 } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
672 * So we don't count the packet more than once.
674 td->tmd1_bits &= ~(LE_T1_POK);
676 /* One collision before packet was sent. */
677 if (td->tmd1_bits & LE_T1_EONE)
678 lp->stats.collisions++;
680 /* More than one collision, be optimistic. */
681 if (td->tmd1_bits & LE_T1_EMORE)
682 lp->stats.collisions += 2;
684 lp->stats.tx_packets++;
686 j = (j + 1) & TX_RING_MOD_MASK;
690 if (netif_queue_stopped(dev) &&
692 netif_wake_queue(dev);
694 spin_unlock(&lp->lock);
697 static irqreturn_t lance_dma_merr_int(const int irq, void *dev_id)
699 struct net_device *dev = dev_id;
701 printk("%s: DMA error\n", dev->name);
705 static irqreturn_t lance_interrupt(const int irq, void *dev_id)
707 struct net_device *dev = dev_id;
708 struct lance_private *lp = netdev_priv(dev);
709 volatile struct lance_regs *ll = lp->ll;
712 writereg(&ll->rap, LE_CSR0);
715 /* Acknowledge all the interrupt sources ASAP */
716 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
718 if ((csr0 & LE_C0_ERR)) {
719 /* Clear the error condition */
720 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
721 LE_C0_CERR | LE_C0_MERR);
723 if (csr0 & LE_C0_RINT)
726 if (csr0 & LE_C0_TINT)
729 if (csr0 & LE_C0_BABL)
730 lp->stats.tx_errors++;
732 if (csr0 & LE_C0_MISS)
733 lp->stats.rx_errors++;
735 if (csr0 & LE_C0_MERR) {
736 printk("%s: Memory error, status %04x\n", dev->name, csr0);
738 writereg(&ll->rdp, LE_C0_STOP);
740 lance_init_ring(dev);
742 init_restart_lance(lp);
743 netif_wake_queue(dev);
746 writereg(&ll->rdp, LE_C0_INEA);
747 writereg(&ll->rdp, LE_C0_INEA);
751 struct net_device *last_dev = 0;
753 static int lance_open(struct net_device *dev)
755 volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
756 struct lance_private *lp = netdev_priv(dev);
757 volatile struct lance_regs *ll = lp->ll;
763 writereg(&ll->rap, LE_CSR0);
764 writereg(&ll->rdp, LE_C0_STOP);
766 /* Set mode and clear multicast filter only at device open,
767 * so that lance_init_ring() called at any error will not
768 * forget multicast filters.
770 * BTW it is common bug in all lance drivers! --ANK
778 lance_init_ring(dev);
781 netif_start_queue(dev);
783 /* Associate IRQ with lance_interrupt */
784 if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) {
785 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
788 if (lp->dma_irq >= 0) {
791 if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0,
792 "lance error", dev)) {
793 free_irq(dev->irq, dev);
794 printk("%s: Can't get DMA IRQ %d\n", dev->name,
799 spin_lock_irqsave(&ioasic_ssr_lock, flags);
802 /* Enable I/O ASIC LANCE DMA. */
803 ioasic_write(IO_REG_SSR,
804 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
807 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
810 status = init_restart_lance(lp);
814 static int lance_close(struct net_device *dev)
816 struct lance_private *lp = netdev_priv(dev);
817 volatile struct lance_regs *ll = lp->ll;
819 netif_stop_queue(dev);
820 del_timer_sync(&lp->multicast_timer);
823 writereg(&ll->rap, LE_CSR0);
824 writereg(&ll->rdp, LE_C0_STOP);
826 if (lp->dma_irq >= 0) {
829 spin_lock_irqsave(&ioasic_ssr_lock, flags);
832 /* Disable I/O ASIC LANCE DMA. */
833 ioasic_write(IO_REG_SSR,
834 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
837 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
839 free_irq(lp->dma_irq, dev);
841 free_irq(dev->irq, dev);
845 static inline int lance_reset(struct net_device *dev)
847 struct lance_private *lp = netdev_priv(dev);
848 volatile struct lance_regs *ll = lp->ll;
852 writereg(&ll->rap, LE_CSR0);
853 writereg(&ll->rdp, LE_C0_STOP);
855 lance_init_ring(dev);
857 dev->trans_start = jiffies;
858 status = init_restart_lance(lp);
862 static void lance_tx_timeout(struct net_device *dev)
864 struct lance_private *lp = netdev_priv(dev);
865 volatile struct lance_regs *ll = lp->ll;
867 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
870 netif_wake_queue(dev);
873 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
875 struct lance_private *lp = netdev_priv(dev);
876 volatile struct lance_regs *ll = lp->ll;
877 volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
878 int entry, skblen, len;
884 if (len < ETH_ZLEN) {
885 if (skb_padto(skb, ETH_ZLEN))
890 lp->stats.tx_bytes += len;
892 entry = lp->tx_new & TX_RING_MOD_MASK;
893 ib->btx_ring[entry].length = (-len);
894 ib->btx_ring[entry].misc = 0;
896 cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data,
899 /* Clear the slack of the packet, do I need this? */
900 /* For a firewall it's a good idea - AC */
903 memset ((char *) &ib->tx_buf [entry][skblen], 0, (len - skblen) << 1);
906 /* Now, give the packet to the lance */
907 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
908 lp->tx_new = (lp->tx_new + 1) & TX_RING_MOD_MASK;
910 if (TX_BUFFS_AVAIL <= 0)
911 netif_stop_queue(dev);
913 /* Kick the lance: transmit now */
914 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
916 spin_unlock_irq(&lp->lock);
918 dev->trans_start = jiffies;
924 static struct net_device_stats *lance_get_stats(struct net_device *dev)
926 struct lance_private *lp = netdev_priv(dev);
931 static void lance_load_multicast(struct net_device *dev)
933 volatile struct lance_init_block *ib = (struct lance_init_block *) (dev->mem_start);
934 volatile u16 *mcast_table = (u16 *) & ib->filter;
935 struct dev_mc_list *dmi = dev->mc_list;
940 /* set all multicast bits */
941 if (dev->flags & IFF_ALLMULTI) {
942 ib->filter[0] = 0xffff;
943 ib->filter[2] = 0xffff;
944 ib->filter[4] = 0xffff;
945 ib->filter[6] = 0xffff;
948 /* clear the multicast filter */
955 for (i = 0; i < dev->mc_count; i++) {
956 addrs = dmi->dmi_addr;
959 /* multicast address? */
963 crc = ether_crc_le(ETH_ALEN, addrs);
965 mcast_table[2 * (crc >> 4)] |= 1 << (crc & 0xf);
970 static void lance_set_multicast(struct net_device *dev)
972 struct lance_private *lp = netdev_priv(dev);
973 volatile struct lance_init_block *ib;
974 volatile struct lance_regs *ll = lp->ll;
976 ib = (struct lance_init_block *) (dev->mem_start);
978 if (!netif_running(dev))
981 if (lp->tx_old != lp->tx_new) {
982 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
983 netif_wake_queue(dev);
987 netif_stop_queue(dev);
989 writereg(&ll->rap, LE_CSR0);
990 writereg(&ll->rdp, LE_C0_STOP);
992 lance_init_ring(dev);
994 if (dev->flags & IFF_PROMISC) {
995 ib->mode |= LE_MO_PROM;
997 ib->mode &= ~LE_MO_PROM;
998 lance_load_multicast(dev);
1001 init_restart_lance(lp);
1002 netif_wake_queue(dev);
1005 static void lance_set_multicast_retry(unsigned long _opaque)
1007 struct net_device *dev = (struct net_device *) _opaque;
1009 lance_set_multicast(dev);
1012 static int __init dec_lance_init(const int type, const int slot)
1014 static unsigned version_printed;
1015 static const char fmt[] = "declance%d";
1017 struct net_device *dev;
1018 struct lance_private *lp;
1019 volatile struct lance_regs *ll;
1021 unsigned long esar_base;
1022 unsigned char *esar;
1024 if (dec_lance_debug && version_printed++ == 0)
1028 dev = root_lance_dev;
1031 lp = (struct lance_private *)dev->priv;
1034 snprintf(name, sizeof(name), fmt, i);
1036 dev = alloc_etherdev(sizeof(struct lance_private));
1038 printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n",
1045 * alloc_etherdev ensures the data structures used by the LANCE
1048 lp = netdev_priv(dev);
1049 spin_lock_init(&lp->lock);
1056 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1058 /* buffer space for the on-board LANCE shared memory */
1062 dev->mem_start = CKSEG1ADDR(0x00020000);
1063 dev->mem_end = dev->mem_start + 0x00020000;
1064 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1065 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1067 /* Workaround crash with booting KN04 2.1k from Disk */
1068 memset((void *)dev->mem_start, 0,
1069 dev->mem_end - dev->mem_start);
1072 * setup the pointer arrays, this sucks [tm] :-(
1074 for (i = 0; i < RX_RING_SIZE; i++) {
1075 lp->rx_buf_ptr_cpu[i] =
1076 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1077 2 * i * RX_BUFF_SIZE);
1078 lp->rx_buf_ptr_lnc[i] =
1079 (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1081 for (i = 0; i < TX_RING_SIZE; i++) {
1082 lp->tx_buf_ptr_cpu[i] =
1083 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1084 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1085 2 * i * TX_BUFF_SIZE);
1086 lp->tx_buf_ptr_lnc[i] =
1087 (char *)(BUF_OFFSET_LNC +
1088 RX_RING_SIZE * RX_BUFF_SIZE +
1092 /* Setup I/O ASIC LANCE DMA. */
1093 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1094 ioasic_write(IO_REG_LANCE_DMA_P,
1095 CPHYSADDR(dev->mem_start) << 3);
1100 claim_tc_card(slot);
1102 dev->mem_start = CKSEG1ADDR(get_tc_base_addr(slot));
1103 dev->base_addr = dev->mem_start + 0x100000;
1104 dev->irq = get_tc_irq_nr(slot);
1105 esar_base = dev->mem_start + 0x1c0002;
1108 for (i = 0; i < RX_RING_SIZE; i++) {
1109 lp->rx_buf_ptr_cpu[i] =
1110 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1112 lp->rx_buf_ptr_lnc[i] =
1113 (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1115 for (i = 0; i < TX_RING_SIZE; i++) {
1116 lp->tx_buf_ptr_cpu[i] =
1117 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1118 RX_RING_SIZE * RX_BUFF_SIZE +
1120 lp->tx_buf_ptr_lnc[i] =
1121 (char *)(BUF_OFFSET_LNC +
1122 RX_RING_SIZE * RX_BUFF_SIZE +
1130 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1131 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1132 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1133 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1137 * setup the pointer arrays, this sucks [tm] :-(
1139 for (i = 0; i < RX_RING_SIZE; i++) {
1140 lp->rx_buf_ptr_cpu[i] =
1141 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1142 2 * i * RX_BUFF_SIZE);
1143 lp->rx_buf_ptr_lnc[i] =
1144 (char *)(BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1146 for (i = 0; i < TX_RING_SIZE; i++) {
1147 lp->tx_buf_ptr_cpu[i] =
1148 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1149 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1150 2 * i * TX_BUFF_SIZE);
1151 lp->tx_buf_ptr_lnc[i] =
1152 (char *)(BUF_OFFSET_LNC +
1153 RX_RING_SIZE * RX_BUFF_SIZE +
1160 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1163 goto err_out_free_dev;
1166 ll = (struct lance_regs *) dev->base_addr;
1167 esar = (unsigned char *) esar_base;
1170 /* First, check for test pattern */
1171 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1172 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1174 "%s: Ethernet station address prom not found!\n",
1177 goto err_out_free_dev;
1179 /* Check the prom contents */
1180 for (i = 0; i < 8; i++) {
1181 if (esar[i * 4] != esar[0x3c - i * 4] &&
1182 esar[i * 4] != esar[0x40 + i * 4] &&
1183 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1184 printk(KERN_ERR "%s: Something is wrong with the "
1185 "ethernet station address prom!\n", name);
1187 goto err_out_free_dev;
1191 /* Copy the ethernet address to the device structure, later to the
1192 * lance initialization block so the lance gets it every time it's
1197 printk("%s: IOASIC onboard LANCE, addr = ", name);
1200 printk("%s: PMAD-AA, addr = ", name);
1203 printk("%s: PMAX onboard LANCE, addr = ", name);
1206 for (i = 0; i < 6; i++) {
1207 dev->dev_addr[i] = esar[i * 4];
1208 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? ',' : ':');
1211 printk(" irq = %d\n", dev->irq);
1213 dev->open = &lance_open;
1214 dev->stop = &lance_close;
1215 dev->hard_start_xmit = &lance_start_xmit;
1216 dev->tx_timeout = &lance_tx_timeout;
1217 dev->watchdog_timeo = 5*HZ;
1218 dev->get_stats = &lance_get_stats;
1219 dev->set_multicast_list = &lance_set_multicast;
1221 /* lp->ll is the location of the registers for lance card */
1224 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1227 lp->busmaster_regval = 0;
1231 /* We cannot sleep if the chip is busy during a
1232 * multicast list update event, because such events
1233 * can occur from interrupts (ex. IPv6). So we
1234 * use a timer to try again later when necessary. -DaveM
1236 init_timer(&lp->multicast_timer);
1237 lp->multicast_timer.data = (unsigned long) dev;
1238 lp->multicast_timer.function = &lance_set_multicast_retry;
1240 ret = register_netdev(dev);
1243 "%s: Unable to register netdev, aborting.\n", name);
1244 goto err_out_free_dev;
1247 lp->next = root_lance_dev;
1248 root_lance_dev = dev;
1250 printk("%s: registered as %s.\n", name, dev->name);
1261 /* Find all the lance cards on the system and initialize them */
1262 static int __init dec_lance_probe(void)
1266 /* Scan slots for PMAD-AA cards first. */
1271 while ((slot = search_tc_card("PMAD-AA")) >= 0) {
1272 if (dec_lance_init(PMAD_LANCE, slot) < 0)
1279 /* Then handle onboard devices. */
1280 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1281 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1283 if (dec_lance_init(ASIC_LANCE, -1) >= 0)
1286 } else if (!TURBOCHANNEL) {
1287 if (dec_lance_init(PMAX_LANCE, -1) >= 0)
1292 return (count > 0) ? 0 : -ENODEV;
1295 static void __exit dec_lance_cleanup(void)
1297 while (root_lance_dev) {
1298 struct net_device *dev = root_lance_dev;
1299 struct lance_private *lp = netdev_priv(dev);
1301 unregister_netdev(dev);
1304 release_tc_card(lp->slot);
1306 root_lance_dev = lp->next;
1311 module_init(dec_lance_probe);
1312 module_exit(dec_lance_cleanup);