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, 2006 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
44 * v0.010: Fixes for the PMAD mapping of the LANCE buffer and for the
45 * PMAX requirement to only use halfword accesses to the
48 * v0.011: Converted the PMAD to the driver model. macro
51 #include <linux/crc32.h>
52 #include <linux/delay.h>
53 #include <linux/errno.h>
54 #include <linux/if_ether.h>
55 #include <linux/init.h>
56 #include <linux/kernel.h>
57 #include <linux/module.h>
58 #include <linux/netdevice.h>
59 #include <linux/etherdevice.h>
60 #include <linux/spinlock.h>
61 #include <linux/stddef.h>
62 #include <linux/string.h>
64 #include <linux/types.h>
66 #include <asm/addrspace.h>
67 #include <asm/system.h>
69 #include <asm/dec/interrupts.h>
70 #include <asm/dec/ioasic.h>
71 #include <asm/dec/ioasic_addrs.h>
72 #include <asm/dec/kn01.h>
73 #include <asm/dec/machtype.h>
74 #include <asm/dec/system.h>
76 static char version[] __devinitdata =
77 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
79 MODULE_AUTHOR("Linux MIPS DECstation task force");
80 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
81 MODULE_LICENSE("GPL");
83 #define __unused __attribute__ ((unused))
98 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
100 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
101 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
102 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
103 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
104 #define LE_C0_MERR 0x0800 /* ME: Memory error */
105 #define LE_C0_RINT 0x0400 /* Received interrupt */
106 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
107 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
108 #define LE_C0_INTR 0x0080 /* Interrupt or error */
109 #define LE_C0_INEA 0x0040 /* Interrupt enable */
110 #define LE_C0_RXON 0x0020 /* Receiver on */
111 #define LE_C0_TXON 0x0010 /* Transmitter on */
112 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
113 #define LE_C0_STOP 0x0004 /* Stop the card */
114 #define LE_C0_STRT 0x0002 /* Start the card */
115 #define LE_C0_INIT 0x0001 /* Init the card */
117 #define LE_C3_BSWP 0x4 /* SWAP */
118 #define LE_C3_ACON 0x2 /* ALE Control */
119 #define LE_C3_BCON 0x1 /* Byte control */
121 /* Receive message descriptor 1 */
122 #define LE_R1_OWN 0x8000 /* Who owns the entry */
123 #define LE_R1_ERR 0x4000 /* Error: if FRA, OFL, CRC or BUF is set */
124 #define LE_R1_FRA 0x2000 /* FRA: Frame error */
125 #define LE_R1_OFL 0x1000 /* OFL: Frame overflow */
126 #define LE_R1_CRC 0x0800 /* CRC error */
127 #define LE_R1_BUF 0x0400 /* BUF: Buffer error */
128 #define LE_R1_SOP 0x0200 /* Start of packet */
129 #define LE_R1_EOP 0x0100 /* End of packet */
130 #define LE_R1_POK 0x0300 /* Packet is complete: SOP + EOP */
132 /* Transmit message descriptor 1 */
133 #define LE_T1_OWN 0x8000 /* Lance owns the packet */
134 #define LE_T1_ERR 0x4000 /* Error summary */
135 #define LE_T1_EMORE 0x1000 /* Error: more than one retry needed */
136 #define LE_T1_EONE 0x0800 /* Error: one retry needed */
137 #define LE_T1_EDEF 0x0400 /* Error: deferred */
138 #define LE_T1_SOP 0x0200 /* Start of packet */
139 #define LE_T1_EOP 0x0100 /* End of packet */
140 #define LE_T1_POK 0x0300 /* Packet is complete: SOP + EOP */
142 #define LE_T3_BUF 0x8000 /* Buffer error */
143 #define LE_T3_UFL 0x4000 /* Error underflow */
144 #define LE_T3_LCOL 0x1000 /* Error late collision */
145 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
146 #define LE_T3_RTY 0x0400 /* Error retry */
147 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
149 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
151 #ifndef LANCE_LOG_TX_BUFFERS
152 #define LANCE_LOG_TX_BUFFERS 4
153 #define LANCE_LOG_RX_BUFFERS 4
156 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
157 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
159 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
160 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
162 #define PKT_BUF_SZ 1536
163 #define RX_BUFF_SIZE PKT_BUF_SZ
164 #define TX_BUFF_SIZE PKT_BUF_SZ
170 * The DS2100/3100 have a linear 64 kB buffer which supports halfword
171 * accesses only. Each halfword of the buffer is word-aligned in the
174 * The PMAD-AA has a 128 kB buffer on-board.
176 * The IOASIC LANCE devices use a shared memory region. This region
177 * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
178 * boundary. The LANCE sees this as a 64 kB long continuous memory
181 * The LANCE's DMA address is used as an index in this buffer and DMA
182 * takes place in bursts of eight 16-bit words which are packed into
183 * four 32-bit words by the IOASIC. This leads to a strange padding:
184 * 16 bytes of valid data followed by a 16 byte gap :-(.
187 struct lance_rx_desc {
188 unsigned short rmd0; /* low address of packet */
189 unsigned short rmd1; /* high address of packet
190 and descriptor bits */
191 short length; /* 2s complement (negative!)
193 unsigned short mblength; /* actual number of bytes received */
196 struct lance_tx_desc {
197 unsigned short tmd0; /* low address of packet */
198 unsigned short tmd1; /* high address of packet
199 and descriptor bits */
200 short length; /* 2s complement (negative!)
206 /* First part of the LANCE initialization block, described in databook. */
207 struct lance_init_block {
208 unsigned short mode; /* pre-set mode (reg. 15) */
210 unsigned short phys_addr[3]; /* physical ethernet address */
211 unsigned short filter[4]; /* multicast filter */
213 /* Receive and transmit ring base, along with extra bits. */
214 unsigned short rx_ptr; /* receive descriptor addr */
215 unsigned short rx_len; /* receive len and high addr */
216 unsigned short tx_ptr; /* transmit descriptor addr */
217 unsigned short tx_len; /* transmit len and high addr */
221 /* The buffer descriptors */
222 struct lance_rx_desc brx_ring[RX_RING_SIZE];
223 struct lance_tx_desc btx_ring[TX_RING_SIZE];
226 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
227 #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
229 #define shift_off(off, type) \
230 (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
232 #define lib_off(rt, type) \
233 shift_off(offsetof(struct lance_init_block, rt), type)
235 #define lib_ptr(ib, rt, type) \
236 ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
238 #define rds_off(rt, type) \
239 shift_off(offsetof(struct lance_rx_desc, rt), type)
241 #define rds_ptr(rd, rt, type) \
242 ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
244 #define tds_off(rt, type) \
245 shift_off(offsetof(struct lance_tx_desc, rt), type)
247 #define tds_ptr(td, rt, type) \
248 ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
250 struct lance_private {
251 struct net_device *next;
254 volatile struct lance_regs *ll;
261 unsigned short busmaster_regval;
263 struct timer_list multicast_timer;
265 /* Pointers to the ring buffers as seen from the CPU */
266 char *rx_buf_ptr_cpu[RX_RING_SIZE];
267 char *tx_buf_ptr_cpu[TX_RING_SIZE];
269 /* Pointers to the ring buffers as seen from the LANCE */
270 uint rx_buf_ptr_lnc[RX_RING_SIZE];
271 uint tx_buf_ptr_lnc[TX_RING_SIZE];
274 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
275 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
276 lp->tx_old - lp->tx_new-1)
278 /* The lance control ports are at an absolute address, machine and tc-slot
280 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
281 * so we have to give the structure an extra member making rap pointing
282 * at the right address
285 volatile unsigned short rdp; /* register data port */
287 volatile unsigned short rap; /* register address port */
290 int dec_lance_debug = 2;
292 static struct tc_driver dec_lance_tc_driver;
293 static struct net_device *root_lance_dev;
295 static inline void writereg(volatile unsigned short *regptr, short value)
301 /* Load the CSR registers */
302 static void load_csrs(struct lance_private *lp)
304 volatile struct lance_regs *ll = lp->ll;
307 /* The address space as seen from the LANCE
308 * begins at address 0. HK
312 writereg(&ll->rap, LE_CSR1);
313 writereg(&ll->rdp, (leptr & 0xFFFF));
314 writereg(&ll->rap, LE_CSR2);
315 writereg(&ll->rdp, leptr >> 16);
316 writereg(&ll->rap, LE_CSR3);
317 writereg(&ll->rdp, lp->busmaster_regval);
319 /* Point back to csr0 */
320 writereg(&ll->rap, LE_CSR0);
324 * Our specialized copy routines
327 static void cp_to_buf(const int type, void *to, const void *from, int len)
329 unsigned short *tp, *fp, clen;
330 unsigned char *rtp, *rfp;
332 if (type == PMAD_LANCE) {
333 memcpy(to, from, len);
334 } else if (type == PMAX_LANCE) {
336 tp = (unsigned short *) to;
337 fp = (unsigned short *) from;
345 rtp = (unsigned char *) tp;
346 rfp = (unsigned char *) fp;
352 * copy 16 Byte chunks
355 tp = (unsigned short *) to;
356 fp = (unsigned short *) from;
370 * do the rest, if any.
373 rtp = (unsigned char *) tp;
374 rfp = (unsigned char *) fp;
383 static void cp_from_buf(const int type, void *to, const void *from, int len)
385 unsigned short *tp, *fp, clen;
386 unsigned char *rtp, *rfp;
388 if (type == PMAD_LANCE) {
389 memcpy(to, from, len);
390 } else if (type == PMAX_LANCE) {
392 tp = (unsigned short *) to;
393 fp = (unsigned short *) from;
401 rtp = (unsigned char *) tp;
402 rfp = (unsigned char *) fp;
410 * copy 16 Byte chunks
413 tp = (unsigned short *) to;
414 fp = (unsigned short *) from;
428 * do the rest, if any.
431 rtp = (unsigned char *) tp;
432 rfp = (unsigned char *) fp;
442 /* Setup the Lance Rx and Tx rings */
443 static void lance_init_ring(struct net_device *dev)
445 struct lance_private *lp = netdev_priv(dev);
446 volatile u16 *ib = (volatile u16 *)dev->mem_start;
450 /* Lock out other processes while setting up hardware */
451 netif_stop_queue(dev);
452 lp->rx_new = lp->tx_new = 0;
453 lp->rx_old = lp->tx_old = 0;
455 /* Copy the ethernet address to the lance init block.
456 * XXX bit 0 of the physical address registers has to be zero
458 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
460 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
462 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
464 /* Setup the initialization block */
466 /* Setup rx descriptor pointer */
467 leptr = offsetof(struct lance_init_block, brx_ring);
468 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
470 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
472 printk("RX ptr: %8.8x(%8.8x)\n",
473 leptr, lib_off(brx_ring, lp->type));
475 /* Setup tx descriptor pointer */
476 leptr = offsetof(struct lance_init_block, btx_ring);
477 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
479 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
481 printk("TX ptr: %8.8x(%8.8x)\n",
482 leptr, lib_off(btx_ring, lp->type));
485 printk("TX rings:\n");
487 /* Setup the Tx ring entries */
488 for (i = 0; i < TX_RING_SIZE; i++) {
489 leptr = lp->tx_buf_ptr_lnc[i];
490 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
491 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
493 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
494 /* The ones required by tmd2 */
495 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
497 printk("%d: 0x%8.8x(0x%8.8x)\n",
498 i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
501 /* Setup the Rx ring entries */
503 printk("RX rings:\n");
504 for (i = 0; i < RX_RING_SIZE; i++) {
505 leptr = lp->rx_buf_ptr_lnc[i];
506 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
507 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
510 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
512 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
514 printk("%d: 0x%8.8x(0x%8.8x)\n",
515 i, leptr, (uint)lp->rx_buf_ptr_cpu[i]);
520 static int init_restart_lance(struct lance_private *lp)
522 volatile struct lance_regs *ll = lp->ll;
525 writereg(&ll->rap, LE_CSR0);
526 writereg(&ll->rdp, LE_C0_INIT);
528 /* Wait for the lance to complete initialization */
529 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
532 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
533 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
537 if ((ll->rdp & LE_C0_ERR)) {
538 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
542 writereg(&ll->rdp, LE_C0_IDON);
543 writereg(&ll->rdp, LE_C0_STRT);
544 writereg(&ll->rdp, LE_C0_INEA);
549 static int lance_rx(struct net_device *dev)
551 struct lance_private *lp = netdev_priv(dev);
552 volatile u16 *ib = (volatile u16 *)dev->mem_start;
563 for (i = 0; i < RX_RING_SIZE; i++) {
565 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
567 LE_R1_OWN ? "_" : "X");
569 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
571 LE_R1_OWN ? "." : "1");
577 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
578 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
579 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
582 /* We got an incomplete frame? */
583 if ((bits & LE_R1_POK) != LE_R1_POK) {
584 dev->stats.rx_over_errors++;
585 dev->stats.rx_errors++;
586 } else if (bits & LE_R1_ERR) {
587 /* Count only the end frame as a rx error,
590 if (bits & LE_R1_BUF)
591 dev->stats.rx_fifo_errors++;
592 if (bits & LE_R1_CRC)
593 dev->stats.rx_crc_errors++;
594 if (bits & LE_R1_OFL)
595 dev->stats.rx_over_errors++;
596 if (bits & LE_R1_FRA)
597 dev->stats.rx_frame_errors++;
598 if (bits & LE_R1_EOP)
599 dev->stats.rx_errors++;
601 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
602 skb = dev_alloc_skb(len + 2);
605 printk("%s: Memory squeeze, deferring packet.\n",
607 dev->stats.rx_dropped++;
608 *rds_ptr(rd, mblength, lp->type) = 0;
609 *rds_ptr(rd, rmd1, lp->type) =
610 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
612 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
615 dev->stats.rx_bytes += len;
617 skb_reserve(skb, 2); /* 16 byte align */
618 skb_put(skb, len); /* make room */
620 cp_from_buf(lp->type, skb->data,
621 (char *)lp->rx_buf_ptr_cpu[entry], len);
623 skb->protocol = eth_type_trans(skb, dev);
625 dev->stats.rx_packets++;
628 /* Return the packet to the pool */
629 *rds_ptr(rd, mblength, lp->type) = 0;
630 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
631 *rds_ptr(rd, rmd1, lp->type) =
632 ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
633 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
638 static void lance_tx(struct net_device *dev)
640 struct lance_private *lp = netdev_priv(dev);
641 volatile u16 *ib = (volatile u16 *)dev->mem_start;
642 volatile struct lance_regs *ll = lp->ll;
649 spin_lock(&lp->lock);
651 for (i = j; i != lp->tx_new; i = j) {
652 td = lib_ptr(ib, btx_ring[i], lp->type);
653 /* If we hit a packet not owned by us, stop */
654 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
657 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
658 status = *tds_ptr(td, misc, lp->type);
660 dev->stats.tx_errors++;
661 if (status & LE_T3_RTY)
662 dev->stats.tx_aborted_errors++;
663 if (status & LE_T3_LCOL)
664 dev->stats.tx_window_errors++;
666 if (status & LE_T3_CLOS) {
667 dev->stats.tx_carrier_errors++;
668 printk("%s: Carrier Lost\n", dev->name);
670 writereg(&ll->rap, LE_CSR0);
671 writereg(&ll->rdp, LE_C0_STOP);
672 lance_init_ring(dev);
674 init_restart_lance(lp);
677 /* Buffer errors and underflows turn off the
678 * transmitter, restart the adapter.
680 if (status & (LE_T3_BUF | LE_T3_UFL)) {
681 dev->stats.tx_fifo_errors++;
683 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
686 writereg(&ll->rap, LE_CSR0);
687 writereg(&ll->rdp, LE_C0_STOP);
688 lance_init_ring(dev);
690 init_restart_lance(lp);
693 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
696 * So we don't count the packet more than once.
698 *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
700 /* One collision before packet was sent. */
701 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
702 dev->stats.collisions++;
704 /* More than one collision, be optimistic. */
705 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
706 dev->stats.collisions += 2;
708 dev->stats.tx_packets++;
710 j = (j + 1) & TX_RING_MOD_MASK;
714 if (netif_queue_stopped(dev) &&
716 netif_wake_queue(dev);
718 spin_unlock(&lp->lock);
721 static irqreturn_t lance_dma_merr_int(int irq, void *dev_id)
723 struct net_device *dev = dev_id;
725 printk(KERN_ERR "%s: DMA error\n", dev->name);
729 static irqreturn_t lance_interrupt(int irq, void *dev_id)
731 struct net_device *dev = dev_id;
732 struct lance_private *lp = netdev_priv(dev);
733 volatile struct lance_regs *ll = lp->ll;
736 writereg(&ll->rap, LE_CSR0);
739 /* Acknowledge all the interrupt sources ASAP */
740 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
742 if ((csr0 & LE_C0_ERR)) {
743 /* Clear the error condition */
744 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
745 LE_C0_CERR | LE_C0_MERR);
747 if (csr0 & LE_C0_RINT)
750 if (csr0 & LE_C0_TINT)
753 if (csr0 & LE_C0_BABL)
754 dev->stats.tx_errors++;
756 if (csr0 & LE_C0_MISS)
757 dev->stats.rx_errors++;
759 if (csr0 & LE_C0_MERR) {
760 printk("%s: Memory error, status %04x\n", dev->name, csr0);
762 writereg(&ll->rdp, LE_C0_STOP);
764 lance_init_ring(dev);
766 init_restart_lance(lp);
767 netif_wake_queue(dev);
770 writereg(&ll->rdp, LE_C0_INEA);
771 writereg(&ll->rdp, LE_C0_INEA);
775 static int lance_open(struct net_device *dev)
777 volatile u16 *ib = (volatile u16 *)dev->mem_start;
778 struct lance_private *lp = netdev_priv(dev);
779 volatile struct lance_regs *ll = lp->ll;
783 writereg(&ll->rap, LE_CSR0);
784 writereg(&ll->rdp, LE_C0_STOP);
786 /* Set mode and clear multicast filter only at device open,
787 * so that lance_init_ring() called at any error will not
788 * forget multicast filters.
790 * BTW it is common bug in all lance drivers! --ANK
792 *lib_ptr(ib, mode, lp->type) = 0;
793 *lib_ptr(ib, filter[0], lp->type) = 0;
794 *lib_ptr(ib, filter[1], lp->type) = 0;
795 *lib_ptr(ib, filter[2], lp->type) = 0;
796 *lib_ptr(ib, filter[3], lp->type) = 0;
798 lance_init_ring(dev);
801 netif_start_queue(dev);
803 /* Associate IRQ with lance_interrupt */
804 if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
805 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
808 if (lp->dma_irq >= 0) {
811 if (request_irq(lp->dma_irq, lance_dma_merr_int, 0,
812 "lance error", dev)) {
813 free_irq(dev->irq, dev);
814 printk("%s: Can't get DMA IRQ %d\n", dev->name,
819 spin_lock_irqsave(&ioasic_ssr_lock, flags);
822 /* Enable I/O ASIC LANCE DMA. */
823 ioasic_write(IO_REG_SSR,
824 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
827 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
830 status = init_restart_lance(lp);
834 static int lance_close(struct net_device *dev)
836 struct lance_private *lp = netdev_priv(dev);
837 volatile struct lance_regs *ll = lp->ll;
839 netif_stop_queue(dev);
840 del_timer_sync(&lp->multicast_timer);
843 writereg(&ll->rap, LE_CSR0);
844 writereg(&ll->rdp, LE_C0_STOP);
846 if (lp->dma_irq >= 0) {
849 spin_lock_irqsave(&ioasic_ssr_lock, flags);
852 /* Disable I/O ASIC LANCE DMA. */
853 ioasic_write(IO_REG_SSR,
854 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
857 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
859 free_irq(lp->dma_irq, dev);
861 free_irq(dev->irq, dev);
865 static inline int lance_reset(struct net_device *dev)
867 struct lance_private *lp = netdev_priv(dev);
868 volatile struct lance_regs *ll = lp->ll;
872 writereg(&ll->rap, LE_CSR0);
873 writereg(&ll->rdp, LE_C0_STOP);
875 lance_init_ring(dev);
877 dev->trans_start = jiffies; /* prevent tx timeout */
878 status = init_restart_lance(lp);
882 static void lance_tx_timeout(struct net_device *dev)
884 struct lance_private *lp = netdev_priv(dev);
885 volatile struct lance_regs *ll = lp->ll;
887 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
890 netif_wake_queue(dev);
893 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
895 struct lance_private *lp = netdev_priv(dev);
896 volatile struct lance_regs *ll = lp->ll;
897 volatile u16 *ib = (volatile u16 *)dev->mem_start;
903 if (len < ETH_ZLEN) {
904 if (skb_padto(skb, ETH_ZLEN))
909 dev->stats.tx_bytes += len;
911 spin_lock_irqsave(&lp->lock, flags);
914 *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
915 *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
917 cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data, len);
919 /* Now, give the packet to the lance */
920 *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
921 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
922 (LE_T1_POK | LE_T1_OWN);
923 lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
925 if (TX_BUFFS_AVAIL <= 0)
926 netif_stop_queue(dev);
928 /* Kick the lance: transmit now */
929 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
931 spin_unlock_irqrestore(&lp->lock, flags);
938 static void lance_load_multicast(struct net_device *dev)
940 struct lance_private *lp = netdev_priv(dev);
941 volatile u16 *ib = (volatile u16 *)dev->mem_start;
942 struct netdev_hw_addr *ha;
946 /* set all multicast bits */
947 if (dev->flags & IFF_ALLMULTI) {
948 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
949 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
950 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
951 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
954 /* clear the multicast filter */
955 *lib_ptr(ib, filter[0], lp->type) = 0;
956 *lib_ptr(ib, filter[1], lp->type) = 0;
957 *lib_ptr(ib, filter[2], lp->type) = 0;
958 *lib_ptr(ib, filter[3], lp->type) = 0;
961 netdev_for_each_mc_addr(ha, dev) {
964 /* multicast address? */
968 crc = ether_crc_le(ETH_ALEN, addrs);
970 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
974 static void lance_set_multicast(struct net_device *dev)
976 struct lance_private *lp = netdev_priv(dev);
977 volatile u16 *ib = (volatile u16 *)dev->mem_start;
978 volatile struct lance_regs *ll = lp->ll;
980 if (!netif_running(dev))
983 if (lp->tx_old != lp->tx_new) {
984 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
985 netif_wake_queue(dev);
989 netif_stop_queue(dev);
991 writereg(&ll->rap, LE_CSR0);
992 writereg(&ll->rdp, LE_C0_STOP);
994 lance_init_ring(dev);
996 if (dev->flags & IFF_PROMISC) {
997 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
999 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
1000 lance_load_multicast(dev);
1003 init_restart_lance(lp);
1004 netif_wake_queue(dev);
1007 static void lance_set_multicast_retry(unsigned long _opaque)
1009 struct net_device *dev = (struct net_device *) _opaque;
1011 lance_set_multicast(dev);
1014 static const struct net_device_ops lance_netdev_ops = {
1015 .ndo_open = lance_open,
1016 .ndo_stop = lance_close,
1017 .ndo_start_xmit = lance_start_xmit,
1018 .ndo_tx_timeout = lance_tx_timeout,
1019 .ndo_set_multicast_list = lance_set_multicast,
1020 .ndo_change_mtu = eth_change_mtu,
1021 .ndo_validate_addr = eth_validate_addr,
1022 .ndo_set_mac_address = eth_mac_addr,
1025 static int __devinit dec_lance_probe(struct device *bdev, const int type)
1027 static unsigned version_printed;
1028 static const char fmt[] = "declance%d";
1030 struct net_device *dev;
1031 struct lance_private *lp;
1032 volatile struct lance_regs *ll;
1033 resource_size_t start = 0, len = 0;
1035 unsigned long esar_base;
1036 unsigned char *esar;
1038 if (dec_lance_debug && version_printed++ == 0)
1042 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1045 dev = root_lance_dev;
1048 lp = netdev_priv(dev);
1051 snprintf(name, sizeof(name), fmt, i);
1054 dev = alloc_etherdev(sizeof(struct lance_private));
1056 printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n",
1063 * alloc_etherdev ensures the data structures used by the LANCE
1066 lp = netdev_priv(dev);
1067 spin_lock_init(&lp->lock);
1072 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1074 /* buffer space for the on-board LANCE shared memory */
1078 dev->mem_start = CKSEG1ADDR(0x00020000);
1079 dev->mem_end = dev->mem_start + 0x00020000;
1080 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1081 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1083 /* Workaround crash with booting KN04 2.1k from Disk */
1084 memset((void *)dev->mem_start, 0,
1085 dev->mem_end - dev->mem_start);
1088 * setup the pointer arrays, this sucks [tm] :-(
1090 for (i = 0; i < RX_RING_SIZE; i++) {
1091 lp->rx_buf_ptr_cpu[i] =
1092 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1093 2 * i * RX_BUFF_SIZE);
1094 lp->rx_buf_ptr_lnc[i] =
1095 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1097 for (i = 0; i < TX_RING_SIZE; i++) {
1098 lp->tx_buf_ptr_cpu[i] =
1099 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1100 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1101 2 * i * TX_BUFF_SIZE);
1102 lp->tx_buf_ptr_lnc[i] =
1104 RX_RING_SIZE * RX_BUFF_SIZE +
1108 /* Setup I/O ASIC LANCE DMA. */
1109 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1110 ioasic_write(IO_REG_LANCE_DMA_P,
1111 CPHYSADDR(dev->mem_start) << 3);
1116 dev_set_drvdata(bdev, dev);
1118 start = to_tc_dev(bdev)->resource.start;
1119 len = to_tc_dev(bdev)->resource.end - start + 1;
1120 if (!request_mem_region(start, len, dev_name(bdev))) {
1122 "%s: Unable to reserve MMIO resource\n",
1128 dev->mem_start = CKSEG1ADDR(start);
1129 dev->mem_end = dev->mem_start + 0x100000;
1130 dev->base_addr = dev->mem_start + 0x100000;
1131 dev->irq = to_tc_dev(bdev)->interrupt;
1132 esar_base = dev->mem_start + 0x1c0002;
1135 for (i = 0; i < RX_RING_SIZE; i++) {
1136 lp->rx_buf_ptr_cpu[i] =
1137 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1139 lp->rx_buf_ptr_lnc[i] =
1140 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1142 for (i = 0; i < TX_RING_SIZE; i++) {
1143 lp->tx_buf_ptr_cpu[i] =
1144 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1145 RX_RING_SIZE * RX_BUFF_SIZE +
1147 lp->tx_buf_ptr_lnc[i] =
1149 RX_RING_SIZE * RX_BUFF_SIZE +
1156 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1157 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1158 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1159 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1160 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1164 * setup the pointer arrays, this sucks [tm] :-(
1166 for (i = 0; i < RX_RING_SIZE; i++) {
1167 lp->rx_buf_ptr_cpu[i] =
1168 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1169 2 * i * RX_BUFF_SIZE);
1170 lp->rx_buf_ptr_lnc[i] =
1171 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1173 for (i = 0; i < TX_RING_SIZE; i++) {
1174 lp->tx_buf_ptr_cpu[i] =
1175 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1176 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1177 2 * i * TX_BUFF_SIZE);
1178 lp->tx_buf_ptr_lnc[i] =
1180 RX_RING_SIZE * RX_BUFF_SIZE +
1187 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1193 ll = (struct lance_regs *) dev->base_addr;
1194 esar = (unsigned char *) esar_base;
1197 /* First, check for test pattern */
1198 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1199 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1201 "%s: Ethernet station address prom not found!\n",
1204 goto err_out_resource;
1206 /* Check the prom contents */
1207 for (i = 0; i < 8; i++) {
1208 if (esar[i * 4] != esar[0x3c - i * 4] &&
1209 esar[i * 4] != esar[0x40 + i * 4] &&
1210 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1211 printk(KERN_ERR "%s: Something is wrong with the "
1212 "ethernet station address prom!\n", name);
1214 goto err_out_resource;
1218 /* Copy the ethernet address to the device structure, later to the
1219 * lance initialization block so the lance gets it every time it's
1224 printk("%s: IOASIC onboard LANCE", name);
1227 printk("%s: PMAD-AA", name);
1230 printk("%s: PMAX onboard LANCE", name);
1233 for (i = 0; i < 6; i++)
1234 dev->dev_addr[i] = esar[i * 4];
1236 printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
1238 dev->netdev_ops = &lance_netdev_ops;
1239 dev->watchdog_timeo = 5*HZ;
1241 /* lp->ll is the location of the registers for lance card */
1244 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1247 lp->busmaster_regval = 0;
1251 /* We cannot sleep if the chip is busy during a
1252 * multicast list update event, because such events
1253 * can occur from interrupts (ex. IPv6). So we
1254 * use a timer to try again later when necessary. -DaveM
1256 init_timer(&lp->multicast_timer);
1257 lp->multicast_timer.data = (unsigned long) dev;
1258 lp->multicast_timer.function = lance_set_multicast_retry;
1260 ret = register_netdev(dev);
1263 "%s: Unable to register netdev, aborting.\n", name);
1264 goto err_out_resource;
1268 lp->next = root_lance_dev;
1269 root_lance_dev = dev;
1272 printk("%s: registered as %s.\n", name, dev->name);
1277 release_mem_region(start, len);
1286 static void __exit dec_lance_remove(struct device *bdev)
1288 struct net_device *dev = dev_get_drvdata(bdev);
1289 resource_size_t start, len;
1291 unregister_netdev(dev);
1292 start = to_tc_dev(bdev)->resource.start;
1293 len = to_tc_dev(bdev)->resource.end - start + 1;
1294 release_mem_region(start, len);
1298 /* Find all the lance cards on the system and initialize them */
1299 static int __init dec_lance_platform_probe(void)
1303 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1304 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1305 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1307 } else if (!TURBOCHANNEL) {
1308 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1313 return (count > 0) ? 0 : -ENODEV;
1316 static void __exit dec_lance_platform_remove(void)
1318 while (root_lance_dev) {
1319 struct net_device *dev = root_lance_dev;
1320 struct lance_private *lp = netdev_priv(dev);
1322 unregister_netdev(dev);
1323 root_lance_dev = lp->next;
1329 static int __devinit dec_lance_tc_probe(struct device *dev);
1330 static int __exit dec_lance_tc_remove(struct device *dev);
1332 static const struct tc_device_id dec_lance_tc_table[] = {
1333 { "DEC ", "PMAD-AA " },
1336 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1338 static struct tc_driver dec_lance_tc_driver = {
1339 .id_table = dec_lance_tc_table,
1342 .bus = &tc_bus_type,
1343 .probe = dec_lance_tc_probe,
1344 .remove = __exit_p(dec_lance_tc_remove),
1348 static int __devinit dec_lance_tc_probe(struct device *dev)
1350 int status = dec_lance_probe(dev, PMAD_LANCE);
1356 static int __exit dec_lance_tc_remove(struct device *dev)
1359 dec_lance_remove(dev);
1364 static int __init dec_lance_init(void)
1368 status = tc_register_driver(&dec_lance_tc_driver);
1370 dec_lance_platform_probe();
1374 static void __exit dec_lance_exit(void)
1376 dec_lance_platform_remove();
1377 tc_unregister_driver(&dec_lance_tc_driver);
1381 module_init(dec_lance_init);
1382 module_exit(dec_lance_exit);