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 struct net_device_stats stats;
263 unsigned short busmaster_regval;
265 struct timer_list multicast_timer;
267 /* Pointers to the ring buffers as seen from the CPU */
268 char *rx_buf_ptr_cpu[RX_RING_SIZE];
269 char *tx_buf_ptr_cpu[TX_RING_SIZE];
271 /* Pointers to the ring buffers as seen from the LANCE */
272 uint rx_buf_ptr_lnc[RX_RING_SIZE];
273 uint tx_buf_ptr_lnc[TX_RING_SIZE];
276 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
277 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
278 lp->tx_old - lp->tx_new-1)
280 /* The lance control ports are at an absolute address, machine and tc-slot
282 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
283 * so we have to give the structure an extra member making rap pointing
284 * at the right address
287 volatile unsigned short rdp; /* register data port */
289 volatile unsigned short rap; /* register address port */
292 int dec_lance_debug = 2;
294 static struct tc_driver dec_lance_tc_driver;
295 static struct net_device *root_lance_dev;
297 static inline void writereg(volatile unsigned short *regptr, short value)
303 /* Load the CSR registers */
304 static void load_csrs(struct lance_private *lp)
306 volatile struct lance_regs *ll = lp->ll;
309 /* The address space as seen from the LANCE
310 * begins at address 0. HK
314 writereg(&ll->rap, LE_CSR1);
315 writereg(&ll->rdp, (leptr & 0xFFFF));
316 writereg(&ll->rap, LE_CSR2);
317 writereg(&ll->rdp, leptr >> 16);
318 writereg(&ll->rap, LE_CSR3);
319 writereg(&ll->rdp, lp->busmaster_regval);
321 /* Point back to csr0 */
322 writereg(&ll->rap, LE_CSR0);
326 * Our specialized copy routines
329 static void cp_to_buf(const int type, void *to, const void *from, int len)
331 unsigned short *tp, *fp, clen;
332 unsigned char *rtp, *rfp;
334 if (type == PMAD_LANCE) {
335 memcpy(to, from, len);
336 } else if (type == PMAX_LANCE) {
338 tp = (unsigned short *) to;
339 fp = (unsigned short *) from;
347 rtp = (unsigned char *) tp;
348 rfp = (unsigned char *) fp;
354 * copy 16 Byte chunks
357 tp = (unsigned short *) to;
358 fp = (unsigned short *) from;
372 * do the rest, if any.
375 rtp = (unsigned char *) tp;
376 rfp = (unsigned char *) fp;
385 static void cp_from_buf(const int type, void *to, const void *from, int len)
387 unsigned short *tp, *fp, clen;
388 unsigned char *rtp, *rfp;
390 if (type == PMAD_LANCE) {
391 memcpy(to, from, len);
392 } else if (type == PMAX_LANCE) {
394 tp = (unsigned short *) to;
395 fp = (unsigned short *) from;
403 rtp = (unsigned char *) tp;
404 rfp = (unsigned char *) fp;
412 * copy 16 Byte chunks
415 tp = (unsigned short *) to;
416 fp = (unsigned short *) from;
430 * do the rest, if any.
433 rtp = (unsigned char *) tp;
434 rfp = (unsigned char *) fp;
444 /* Setup the Lance Rx and Tx rings */
445 static void lance_init_ring(struct net_device *dev)
447 struct lance_private *lp = netdev_priv(dev);
448 volatile u16 *ib = (volatile u16 *)dev->mem_start;
452 /* Lock out other processes while setting up hardware */
453 netif_stop_queue(dev);
454 lp->rx_new = lp->tx_new = 0;
455 lp->rx_old = lp->tx_old = 0;
457 /* Copy the ethernet address to the lance init block.
458 * XXX bit 0 of the physical address registers has to be zero
460 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
462 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
464 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
466 /* Setup the initialization block */
468 /* Setup rx descriptor pointer */
469 leptr = offsetof(struct lance_init_block, brx_ring);
470 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
472 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
474 printk("RX ptr: %8.8x(%8.8x)\n",
475 leptr, lib_off(brx_ring, lp->type));
477 /* Setup tx descriptor pointer */
478 leptr = offsetof(struct lance_init_block, btx_ring);
479 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
481 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
483 printk("TX ptr: %8.8x(%8.8x)\n",
484 leptr, lib_off(btx_ring, lp->type));
487 printk("TX rings:\n");
489 /* Setup the Tx ring entries */
490 for (i = 0; i < TX_RING_SIZE; i++) {
491 leptr = lp->tx_buf_ptr_lnc[i];
492 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
493 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
495 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
496 /* The ones required by tmd2 */
497 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
499 printk("%d: 0x%8.8x(0x%8.8x)\n",
500 i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
503 /* Setup the Rx ring entries */
505 printk("RX rings:\n");
506 for (i = 0; i < RX_RING_SIZE; i++) {
507 leptr = lp->rx_buf_ptr_lnc[i];
508 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
509 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
512 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
514 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
516 printk("%d: 0x%8.8x(0x%8.8x)\n",
517 i, leptr, (uint)lp->rx_buf_ptr_cpu[i]);
522 static int init_restart_lance(struct lance_private *lp)
524 volatile struct lance_regs *ll = lp->ll;
527 writereg(&ll->rap, LE_CSR0);
528 writereg(&ll->rdp, LE_C0_INIT);
530 /* Wait for the lance to complete initialization */
531 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
534 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
535 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
539 if ((ll->rdp & LE_C0_ERR)) {
540 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
544 writereg(&ll->rdp, LE_C0_IDON);
545 writereg(&ll->rdp, LE_C0_STRT);
546 writereg(&ll->rdp, LE_C0_INEA);
551 static int lance_rx(struct net_device *dev)
553 struct lance_private *lp = netdev_priv(dev);
554 volatile u16 *ib = (volatile u16 *)dev->mem_start;
565 for (i = 0; i < RX_RING_SIZE; i++) {
567 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
569 LE_R1_OWN ? "_" : "X");
571 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
573 LE_R1_OWN ? "." : "1");
579 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
580 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
581 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
584 /* We got an incomplete frame? */
585 if ((bits & LE_R1_POK) != LE_R1_POK) {
586 lp->stats.rx_over_errors++;
587 lp->stats.rx_errors++;
588 } else if (bits & LE_R1_ERR) {
589 /* Count only the end frame as a rx error,
592 if (bits & LE_R1_BUF)
593 lp->stats.rx_fifo_errors++;
594 if (bits & LE_R1_CRC)
595 lp->stats.rx_crc_errors++;
596 if (bits & LE_R1_OFL)
597 lp->stats.rx_over_errors++;
598 if (bits & LE_R1_FRA)
599 lp->stats.rx_frame_errors++;
600 if (bits & LE_R1_EOP)
601 lp->stats.rx_errors++;
603 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
604 skb = dev_alloc_skb(len + 2);
607 printk("%s: Memory squeeze, deferring packet.\n",
609 lp->stats.rx_dropped++;
610 *rds_ptr(rd, mblength, lp->type) = 0;
611 *rds_ptr(rd, rmd1, lp->type) =
612 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
614 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
617 lp->stats.rx_bytes += len;
619 skb_reserve(skb, 2); /* 16 byte align */
620 skb_put(skb, len); /* make room */
622 cp_from_buf(lp->type, skb->data,
623 (char *)lp->rx_buf_ptr_cpu[entry], len);
625 skb->protocol = eth_type_trans(skb, dev);
627 dev->last_rx = jiffies;
628 lp->stats.rx_packets++;
631 /* Return the packet to the pool */
632 *rds_ptr(rd, mblength, lp->type) = 0;
633 *rds_ptr(rd, length, lp->type) = -RX_BUFF_SIZE | 0xf000;
634 *rds_ptr(rd, rmd1, lp->type) =
635 ((lp->rx_buf_ptr_lnc[entry] >> 16) & 0xff) | LE_R1_OWN;
636 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
641 static void lance_tx(struct net_device *dev)
643 struct lance_private *lp = netdev_priv(dev);
644 volatile u16 *ib = (volatile u16 *)dev->mem_start;
645 volatile struct lance_regs *ll = lp->ll;
652 spin_lock(&lp->lock);
654 for (i = j; i != lp->tx_new; i = j) {
655 td = lib_ptr(ib, btx_ring[i], lp->type);
656 /* If we hit a packet not owned by us, stop */
657 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_OWN)
660 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_ERR) {
661 status = *tds_ptr(td, misc, lp->type);
663 lp->stats.tx_errors++;
664 if (status & LE_T3_RTY)
665 lp->stats.tx_aborted_errors++;
666 if (status & LE_T3_LCOL)
667 lp->stats.tx_window_errors++;
669 if (status & LE_T3_CLOS) {
670 lp->stats.tx_carrier_errors++;
671 printk("%s: Carrier Lost\n", dev->name);
673 writereg(&ll->rap, LE_CSR0);
674 writereg(&ll->rdp, LE_C0_STOP);
675 lance_init_ring(dev);
677 init_restart_lance(lp);
680 /* Buffer errors and underflows turn off the
681 * transmitter, restart the adapter.
683 if (status & (LE_T3_BUF | LE_T3_UFL)) {
684 lp->stats.tx_fifo_errors++;
686 printk("%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
689 writereg(&ll->rap, LE_CSR0);
690 writereg(&ll->rdp, LE_C0_STOP);
691 lance_init_ring(dev);
693 init_restart_lance(lp);
696 } else if ((*tds_ptr(td, tmd1, lp->type) & LE_T1_POK) ==
699 * So we don't count the packet more than once.
701 *tds_ptr(td, tmd1, lp->type) &= ~(LE_T1_POK);
703 /* One collision before packet was sent. */
704 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EONE)
705 lp->stats.collisions++;
707 /* More than one collision, be optimistic. */
708 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
709 lp->stats.collisions += 2;
711 lp->stats.tx_packets++;
713 j = (j + 1) & TX_RING_MOD_MASK;
717 if (netif_queue_stopped(dev) &&
719 netif_wake_queue(dev);
721 spin_unlock(&lp->lock);
724 static irqreturn_t lance_dma_merr_int(const int irq, void *dev_id)
726 struct net_device *dev = dev_id;
728 printk("%s: DMA error\n", dev->name);
732 static irqreturn_t lance_interrupt(const int irq, void *dev_id)
734 struct net_device *dev = dev_id;
735 struct lance_private *lp = netdev_priv(dev);
736 volatile struct lance_regs *ll = lp->ll;
739 writereg(&ll->rap, LE_CSR0);
742 /* Acknowledge all the interrupt sources ASAP */
743 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
745 if ((csr0 & LE_C0_ERR)) {
746 /* Clear the error condition */
747 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
748 LE_C0_CERR | LE_C0_MERR);
750 if (csr0 & LE_C0_RINT)
753 if (csr0 & LE_C0_TINT)
756 if (csr0 & LE_C0_BABL)
757 lp->stats.tx_errors++;
759 if (csr0 & LE_C0_MISS)
760 lp->stats.rx_errors++;
762 if (csr0 & LE_C0_MERR) {
763 printk("%s: Memory error, status %04x\n", dev->name, csr0);
765 writereg(&ll->rdp, LE_C0_STOP);
767 lance_init_ring(dev);
769 init_restart_lance(lp);
770 netif_wake_queue(dev);
773 writereg(&ll->rdp, LE_C0_INEA);
774 writereg(&ll->rdp, LE_C0_INEA);
778 struct net_device *last_dev = 0;
780 static int lance_open(struct net_device *dev)
782 volatile u16 *ib = (volatile u16 *)dev->mem_start;
783 struct lance_private *lp = netdev_priv(dev);
784 volatile struct lance_regs *ll = lp->ll;
790 writereg(&ll->rap, LE_CSR0);
791 writereg(&ll->rdp, LE_C0_STOP);
793 /* Set mode and clear multicast filter only at device open,
794 * so that lance_init_ring() called at any error will not
795 * forget multicast filters.
797 * BTW it is common bug in all lance drivers! --ANK
799 *lib_ptr(ib, mode, lp->type) = 0;
800 *lib_ptr(ib, filter[0], lp->type) = 0;
801 *lib_ptr(ib, filter[1], lp->type) = 0;
802 *lib_ptr(ib, filter[2], lp->type) = 0;
803 *lib_ptr(ib, filter[3], lp->type) = 0;
805 lance_init_ring(dev);
808 netif_start_queue(dev);
810 /* Associate IRQ with lance_interrupt */
811 if (request_irq(dev->irq, &lance_interrupt, 0, "lance", dev)) {
812 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
815 if (lp->dma_irq >= 0) {
818 if (request_irq(lp->dma_irq, &lance_dma_merr_int, 0,
819 "lance error", dev)) {
820 free_irq(dev->irq, dev);
821 printk("%s: Can't get DMA IRQ %d\n", dev->name,
826 spin_lock_irqsave(&ioasic_ssr_lock, flags);
829 /* Enable I/O ASIC LANCE DMA. */
830 ioasic_write(IO_REG_SSR,
831 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
834 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
837 status = init_restart_lance(lp);
841 static int lance_close(struct net_device *dev)
843 struct lance_private *lp = netdev_priv(dev);
844 volatile struct lance_regs *ll = lp->ll;
846 netif_stop_queue(dev);
847 del_timer_sync(&lp->multicast_timer);
850 writereg(&ll->rap, LE_CSR0);
851 writereg(&ll->rdp, LE_C0_STOP);
853 if (lp->dma_irq >= 0) {
856 spin_lock_irqsave(&ioasic_ssr_lock, flags);
859 /* Disable I/O ASIC LANCE DMA. */
860 ioasic_write(IO_REG_SSR,
861 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
864 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
866 free_irq(lp->dma_irq, dev);
868 free_irq(dev->irq, dev);
872 static inline int lance_reset(struct net_device *dev)
874 struct lance_private *lp = netdev_priv(dev);
875 volatile struct lance_regs *ll = lp->ll;
879 writereg(&ll->rap, LE_CSR0);
880 writereg(&ll->rdp, LE_C0_STOP);
882 lance_init_ring(dev);
884 dev->trans_start = jiffies;
885 status = init_restart_lance(lp);
889 static void lance_tx_timeout(struct net_device *dev)
891 struct lance_private *lp = netdev_priv(dev);
892 volatile struct lance_regs *ll = lp->ll;
894 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
897 netif_wake_queue(dev);
900 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
902 struct lance_private *lp = netdev_priv(dev);
903 volatile struct lance_regs *ll = lp->ll;
904 volatile u16 *ib = (volatile u16 *)dev->mem_start;
909 if (len < ETH_ZLEN) {
910 if (skb_padto(skb, ETH_ZLEN))
915 lp->stats.tx_bytes += len;
918 *lib_ptr(ib, btx_ring[entry].length, lp->type) = (-len);
919 *lib_ptr(ib, btx_ring[entry].misc, lp->type) = 0;
921 cp_to_buf(lp->type, (char *)lp->tx_buf_ptr_cpu[entry], skb->data, len);
923 /* Now, give the packet to the lance */
924 *lib_ptr(ib, btx_ring[entry].tmd1, lp->type) =
925 ((lp->tx_buf_ptr_lnc[entry] >> 16) & 0xff) |
926 (LE_T1_POK | LE_T1_OWN);
927 lp->tx_new = (entry + 1) & TX_RING_MOD_MASK;
929 if (TX_BUFFS_AVAIL <= 0)
930 netif_stop_queue(dev);
932 /* Kick the lance: transmit now */
933 writereg(&ll->rdp, LE_C0_INEA | LE_C0_TDMD);
935 dev->trans_start = jiffies;
941 static struct net_device_stats *lance_get_stats(struct net_device *dev)
943 struct lance_private *lp = netdev_priv(dev);
948 static void lance_load_multicast(struct net_device *dev)
950 struct lance_private *lp = netdev_priv(dev);
951 volatile u16 *ib = (volatile u16 *)dev->mem_start;
952 struct dev_mc_list *dmi = dev->mc_list;
957 /* set all multicast bits */
958 if (dev->flags & IFF_ALLMULTI) {
959 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
960 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
961 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
962 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
965 /* clear the multicast filter */
966 *lib_ptr(ib, filter[0], lp->type) = 0;
967 *lib_ptr(ib, filter[1], lp->type) = 0;
968 *lib_ptr(ib, filter[2], lp->type) = 0;
969 *lib_ptr(ib, filter[3], lp->type) = 0;
972 for (i = 0; i < dev->mc_count; i++) {
973 addrs = dmi->dmi_addr;
976 /* multicast address? */
980 crc = ether_crc_le(ETH_ALEN, addrs);
982 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
987 static void lance_set_multicast(struct net_device *dev)
989 struct lance_private *lp = netdev_priv(dev);
990 volatile u16 *ib = (volatile u16 *)dev->mem_start;
991 volatile struct lance_regs *ll = lp->ll;
993 if (!netif_running(dev))
996 if (lp->tx_old != lp->tx_new) {
997 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
998 netif_wake_queue(dev);
1002 netif_stop_queue(dev);
1004 writereg(&ll->rap, LE_CSR0);
1005 writereg(&ll->rdp, LE_C0_STOP);
1007 lance_init_ring(dev);
1009 if (dev->flags & IFF_PROMISC) {
1010 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
1012 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
1013 lance_load_multicast(dev);
1016 init_restart_lance(lp);
1017 netif_wake_queue(dev);
1020 static void lance_set_multicast_retry(unsigned long _opaque)
1022 struct net_device *dev = (struct net_device *) _opaque;
1024 lance_set_multicast(dev);
1027 static int __init dec_lance_probe(struct device *bdev, const int type)
1029 static unsigned version_printed;
1030 static const char fmt[] = "declance%d";
1032 struct net_device *dev;
1033 struct lance_private *lp;
1034 volatile struct lance_regs *ll;
1035 resource_size_t start = 0, len = 0;
1037 unsigned long esar_base;
1038 unsigned char *esar;
1040 if (dec_lance_debug && version_printed++ == 0)
1044 snprintf(name, sizeof(name), "%s", bdev->bus_id);
1047 dev = root_lance_dev;
1050 lp = (struct lance_private *)dev->priv;
1053 snprintf(name, sizeof(name), fmt, i);
1056 dev = alloc_etherdev(sizeof(struct lance_private));
1058 printk(KERN_ERR "%s: Unable to allocate etherdev, aborting.\n",
1065 * alloc_etherdev ensures the data structures used by the LANCE
1068 lp = netdev_priv(dev);
1069 spin_lock_init(&lp->lock);
1074 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1076 /* buffer space for the on-board LANCE shared memory */
1080 dev->mem_start = CKSEG1ADDR(0x00020000);
1081 dev->mem_end = dev->mem_start + 0x00020000;
1082 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1083 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1085 /* Workaround crash with booting KN04 2.1k from Disk */
1086 memset((void *)dev->mem_start, 0,
1087 dev->mem_end - dev->mem_start);
1090 * setup the pointer arrays, this sucks [tm] :-(
1092 for (i = 0; i < RX_RING_SIZE; i++) {
1093 lp->rx_buf_ptr_cpu[i] =
1094 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1095 2 * i * RX_BUFF_SIZE);
1096 lp->rx_buf_ptr_lnc[i] =
1097 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1099 for (i = 0; i < TX_RING_SIZE; i++) {
1100 lp->tx_buf_ptr_cpu[i] =
1101 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1102 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1103 2 * i * TX_BUFF_SIZE);
1104 lp->tx_buf_ptr_lnc[i] =
1106 RX_RING_SIZE * RX_BUFF_SIZE +
1110 /* Setup I/O ASIC LANCE DMA. */
1111 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1112 ioasic_write(IO_REG_LANCE_DMA_P,
1113 CPHYSADDR(dev->mem_start) << 3);
1118 dev_set_drvdata(bdev, dev);
1120 start = to_tc_dev(bdev)->resource.start;
1121 len = to_tc_dev(bdev)->resource.end - start + 1;
1122 if (!request_mem_region(start, len, bdev->bus_id)) {
1124 "%s: Unable to reserve MMIO resource\n",
1130 dev->mem_start = CKSEG1ADDR(start);
1131 dev->mem_end = dev->mem_start + 0x100000;
1132 dev->base_addr = dev->mem_start + 0x100000;
1133 dev->irq = to_tc_dev(bdev)->interrupt;
1134 esar_base = dev->mem_start + 0x1c0002;
1137 for (i = 0; i < RX_RING_SIZE; i++) {
1138 lp->rx_buf_ptr_cpu[i] =
1139 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1141 lp->rx_buf_ptr_lnc[i] =
1142 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1144 for (i = 0; i < TX_RING_SIZE; i++) {
1145 lp->tx_buf_ptr_cpu[i] =
1146 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1147 RX_RING_SIZE * RX_BUFF_SIZE +
1149 lp->tx_buf_ptr_lnc[i] =
1151 RX_RING_SIZE * RX_BUFF_SIZE +
1158 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1159 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1160 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1161 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1162 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1166 * setup the pointer arrays, this sucks [tm] :-(
1168 for (i = 0; i < RX_RING_SIZE; i++) {
1169 lp->rx_buf_ptr_cpu[i] =
1170 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1171 2 * i * RX_BUFF_SIZE);
1172 lp->rx_buf_ptr_lnc[i] =
1173 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1175 for (i = 0; i < TX_RING_SIZE; i++) {
1176 lp->tx_buf_ptr_cpu[i] =
1177 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1178 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1179 2 * i * TX_BUFF_SIZE);
1180 lp->tx_buf_ptr_lnc[i] =
1182 RX_RING_SIZE * RX_BUFF_SIZE +
1189 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1195 ll = (struct lance_regs *) dev->base_addr;
1196 esar = (unsigned char *) esar_base;
1199 /* First, check for test pattern */
1200 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1201 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1203 "%s: Ethernet station address prom not found!\n",
1206 goto err_out_resource;
1208 /* Check the prom contents */
1209 for (i = 0; i < 8; i++) {
1210 if (esar[i * 4] != esar[0x3c - i * 4] &&
1211 esar[i * 4] != esar[0x40 + i * 4] &&
1212 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1213 printk(KERN_ERR "%s: Something is wrong with the "
1214 "ethernet station address prom!\n", name);
1216 goto err_out_resource;
1220 /* Copy the ethernet address to the device structure, later to the
1221 * lance initialization block so the lance gets it every time it's
1226 printk("%s: IOASIC onboard LANCE, addr = ", name);
1229 printk("%s: PMAD-AA, addr = ", name);
1232 printk("%s: PMAX onboard LANCE, addr = ", name);
1235 for (i = 0; i < 6; i++) {
1236 dev->dev_addr[i] = esar[i * 4];
1237 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? ',' : ':');
1240 printk(" irq = %d\n", dev->irq);
1242 dev->open = &lance_open;
1243 dev->stop = &lance_close;
1244 dev->hard_start_xmit = &lance_start_xmit;
1245 dev->tx_timeout = &lance_tx_timeout;
1246 dev->watchdog_timeo = 5*HZ;
1247 dev->get_stats = &lance_get_stats;
1248 dev->set_multicast_list = &lance_set_multicast;
1250 /* lp->ll is the location of the registers for lance card */
1253 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1256 lp->busmaster_regval = 0;
1260 /* We cannot sleep if the chip is busy during a
1261 * multicast list update event, because such events
1262 * can occur from interrupts (ex. IPv6). So we
1263 * use a timer to try again later when necessary. -DaveM
1265 init_timer(&lp->multicast_timer);
1266 lp->multicast_timer.data = (unsigned long) dev;
1267 lp->multicast_timer.function = &lance_set_multicast_retry;
1269 ret = register_netdev(dev);
1272 "%s: Unable to register netdev, aborting.\n", name);
1273 goto err_out_resource;
1277 lp->next = root_lance_dev;
1278 root_lance_dev = dev;
1281 printk("%s: registered as %s.\n", name, dev->name);
1286 release_mem_region(start, len);
1295 static void __exit dec_lance_remove(struct device *bdev)
1297 struct net_device *dev = dev_get_drvdata(bdev);
1298 resource_size_t start, len;
1300 unregister_netdev(dev);
1301 start = to_tc_dev(bdev)->resource.start;
1302 len = to_tc_dev(bdev)->resource.end - start + 1;
1303 release_mem_region(start, len);
1307 /* Find all the lance cards on the system and initialize them */
1308 static int __init dec_lance_platform_probe(void)
1312 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1313 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1314 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1316 } else if (!TURBOCHANNEL) {
1317 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1322 return (count > 0) ? 0 : -ENODEV;
1325 static void __exit dec_lance_platform_remove(void)
1327 while (root_lance_dev) {
1328 struct net_device *dev = root_lance_dev;
1329 struct lance_private *lp = netdev_priv(dev);
1331 unregister_netdev(dev);
1332 root_lance_dev = lp->next;
1338 static int __init dec_lance_tc_probe(struct device *dev);
1339 static int __exit dec_lance_tc_remove(struct device *dev);
1341 static const struct tc_device_id dec_lance_tc_table[] = {
1342 { "DEC ", "PMAD-AA " },
1345 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1347 static struct tc_driver dec_lance_tc_driver = {
1348 .id_table = dec_lance_tc_table,
1351 .bus = &tc_bus_type,
1352 .probe = dec_lance_tc_probe,
1353 .remove = __exit_p(dec_lance_tc_remove),
1357 static int __init dec_lance_tc_probe(struct device *dev)
1359 int status = dec_lance_probe(dev, PMAD_LANCE);
1365 static int __exit dec_lance_tc_remove(struct device *dev)
1368 dec_lance_remove(dev);
1373 static int __init dec_lance_init(void)
1377 status = tc_register_driver(&dec_lance_tc_driver);
1379 dec_lance_platform_probe();
1383 static void __exit dec_lance_exit(void)
1385 dec_lance_platform_remove();
1386 tc_unregister_driver(&dec_lance_tc_driver);
1390 module_init(dec_lance_init);
1391 module_exit(dec_lance_exit);