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>
68 #include <asm/dec/interrupts.h>
69 #include <asm/dec/ioasic.h>
70 #include <asm/dec/ioasic_addrs.h>
71 #include <asm/dec/kn01.h>
72 #include <asm/dec/machtype.h>
73 #include <asm/dec/system.h>
75 static char version[] =
76 "declance.c: v0.011 by Linux MIPS DECstation task force\n";
78 MODULE_AUTHOR("Linux MIPS DECstation task force");
79 MODULE_DESCRIPTION("DEC LANCE (DECstation onboard, PMAD-xx) driver");
80 MODULE_LICENSE("GPL");
82 #define __unused __attribute__ ((unused))
97 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
99 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
100 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
101 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
102 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
103 #define LE_C0_MERR 0x0800 /* ME: Memory error */
104 #define LE_C0_RINT 0x0400 /* Received interrupt */
105 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
106 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
107 #define LE_C0_INTR 0x0080 /* Interrupt or error */
108 #define LE_C0_INEA 0x0040 /* Interrupt enable */
109 #define LE_C0_RXON 0x0020 /* Receiver on */
110 #define LE_C0_TXON 0x0010 /* Transmitter on */
111 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
112 #define LE_C0_STOP 0x0004 /* Stop the card */
113 #define LE_C0_STRT 0x0002 /* Start the card */
114 #define LE_C0_INIT 0x0001 /* Init the card */
116 #define LE_C3_BSWP 0x4 /* SWAP */
117 #define LE_C3_ACON 0x2 /* ALE Control */
118 #define LE_C3_BCON 0x1 /* Byte control */
120 /* Receive message descriptor 1 */
121 #define LE_R1_OWN 0x8000 /* Who owns the entry */
122 #define LE_R1_ERR 0x4000 /* Error: if FRA, OFL, CRC or BUF is set */
123 #define LE_R1_FRA 0x2000 /* FRA: Frame error */
124 #define LE_R1_OFL 0x1000 /* OFL: Frame overflow */
125 #define LE_R1_CRC 0x0800 /* CRC error */
126 #define LE_R1_BUF 0x0400 /* BUF: Buffer error */
127 #define LE_R1_SOP 0x0200 /* Start of packet */
128 #define LE_R1_EOP 0x0100 /* End of packet */
129 #define LE_R1_POK 0x0300 /* Packet is complete: SOP + EOP */
131 /* Transmit message descriptor 1 */
132 #define LE_T1_OWN 0x8000 /* Lance owns the packet */
133 #define LE_T1_ERR 0x4000 /* Error summary */
134 #define LE_T1_EMORE 0x1000 /* Error: more than one retry needed */
135 #define LE_T1_EONE 0x0800 /* Error: one retry needed */
136 #define LE_T1_EDEF 0x0400 /* Error: deferred */
137 #define LE_T1_SOP 0x0200 /* Start of packet */
138 #define LE_T1_EOP 0x0100 /* End of packet */
139 #define LE_T1_POK 0x0300 /* Packet is complete: SOP + EOP */
141 #define LE_T3_BUF 0x8000 /* Buffer error */
142 #define LE_T3_UFL 0x4000 /* Error underflow */
143 #define LE_T3_LCOL 0x1000 /* Error late collision */
144 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
145 #define LE_T3_RTY 0x0400 /* Error retry */
146 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
148 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
150 #ifndef LANCE_LOG_TX_BUFFERS
151 #define LANCE_LOG_TX_BUFFERS 4
152 #define LANCE_LOG_RX_BUFFERS 4
155 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
156 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
158 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
159 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
161 #define PKT_BUF_SZ 1536
162 #define RX_BUFF_SIZE PKT_BUF_SZ
163 #define TX_BUFF_SIZE PKT_BUF_SZ
169 * The DS2100/3100 have a linear 64 kB buffer which supports halfword
170 * accesses only. Each halfword of the buffer is word-aligned in the
173 * The PMAD-AA has a 128 kB buffer on-board.
175 * The IOASIC LANCE devices use a shared memory region. This region
176 * as seen from the CPU is (max) 128 kB long and has to be on an 128 kB
177 * boundary. The LANCE sees this as a 64 kB long continuous memory
180 * The LANCE's DMA address is used as an index in this buffer and DMA
181 * takes place in bursts of eight 16-bit words which are packed into
182 * four 32-bit words by the IOASIC. This leads to a strange padding:
183 * 16 bytes of valid data followed by a 16 byte gap :-(.
186 struct lance_rx_desc {
187 unsigned short rmd0; /* low address of packet */
188 unsigned short rmd1; /* high address of packet
189 and descriptor bits */
190 short length; /* 2s complement (negative!)
192 unsigned short mblength; /* actual number of bytes received */
195 struct lance_tx_desc {
196 unsigned short tmd0; /* low address of packet */
197 unsigned short tmd1; /* high address of packet
198 and descriptor bits */
199 short length; /* 2s complement (negative!)
205 /* First part of the LANCE initialization block, described in databook. */
206 struct lance_init_block {
207 unsigned short mode; /* pre-set mode (reg. 15) */
209 unsigned short phys_addr[3]; /* physical ethernet address */
210 unsigned short filter[4]; /* multicast filter */
212 /* Receive and transmit ring base, along with extra bits. */
213 unsigned short rx_ptr; /* receive descriptor addr */
214 unsigned short rx_len; /* receive len and high addr */
215 unsigned short tx_ptr; /* transmit descriptor addr */
216 unsigned short tx_len; /* transmit len and high addr */
220 /* The buffer descriptors */
221 struct lance_rx_desc brx_ring[RX_RING_SIZE];
222 struct lance_tx_desc btx_ring[TX_RING_SIZE];
225 #define BUF_OFFSET_CPU sizeof(struct lance_init_block)
226 #define BUF_OFFSET_LNC sizeof(struct lance_init_block)
228 #define shift_off(off, type) \
229 (type == ASIC_LANCE || type == PMAX_LANCE ? off << 1 : off)
231 #define lib_off(rt, type) \
232 shift_off(offsetof(struct lance_init_block, rt), type)
234 #define lib_ptr(ib, rt, type) \
235 ((volatile u16 *)((u8 *)(ib) + lib_off(rt, type)))
237 #define rds_off(rt, type) \
238 shift_off(offsetof(struct lance_rx_desc, rt), type)
240 #define rds_ptr(rd, rt, type) \
241 ((volatile u16 *)((u8 *)(rd) + rds_off(rt, type)))
243 #define tds_off(rt, type) \
244 shift_off(offsetof(struct lance_tx_desc, rt), type)
246 #define tds_ptr(td, rt, type) \
247 ((volatile u16 *)((u8 *)(td) + tds_off(rt, type)))
249 struct lance_private {
250 struct net_device *next;
253 volatile struct lance_regs *ll;
260 unsigned short busmaster_regval;
262 struct timer_list multicast_timer;
264 /* Pointers to the ring buffers as seen from the CPU */
265 char *rx_buf_ptr_cpu[RX_RING_SIZE];
266 char *tx_buf_ptr_cpu[TX_RING_SIZE];
268 /* Pointers to the ring buffers as seen from the LANCE */
269 uint rx_buf_ptr_lnc[RX_RING_SIZE];
270 uint tx_buf_ptr_lnc[TX_RING_SIZE];
273 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
274 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
275 lp->tx_old - lp->tx_new-1)
277 /* The lance control ports are at an absolute address, machine and tc-slot
279 * DECstations do only 32-bit access and the LANCE uses 16 bit addresses,
280 * so we have to give the structure an extra member making rap pointing
281 * at the right address
284 volatile unsigned short rdp; /* register data port */
286 volatile unsigned short rap; /* register address port */
289 int dec_lance_debug = 2;
291 static struct tc_driver dec_lance_tc_driver;
292 static struct net_device *root_lance_dev;
294 static inline void writereg(volatile unsigned short *regptr, short value)
300 /* Load the CSR registers */
301 static void load_csrs(struct lance_private *lp)
303 volatile struct lance_regs *ll = lp->ll;
306 /* The address space as seen from the LANCE
307 * begins at address 0. HK
311 writereg(&ll->rap, LE_CSR1);
312 writereg(&ll->rdp, (leptr & 0xFFFF));
313 writereg(&ll->rap, LE_CSR2);
314 writereg(&ll->rdp, leptr >> 16);
315 writereg(&ll->rap, LE_CSR3);
316 writereg(&ll->rdp, lp->busmaster_regval);
318 /* Point back to csr0 */
319 writereg(&ll->rap, LE_CSR0);
323 * Our specialized copy routines
326 static void cp_to_buf(const int type, void *to, const void *from, int len)
329 const unsigned short *fp;
332 const unsigned char *rfp;
334 if (type == PMAD_LANCE) {
335 memcpy(to, from, len);
336 } else if (type == PMAX_LANCE) {
354 * copy 16 Byte chunks
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)
388 const unsigned short *fp;
391 const unsigned char *rfp;
393 if (type == PMAD_LANCE) {
394 memcpy(to, from, len);
395 } else if (type == PMAX_LANCE) {
415 * copy 16 Byte chunks
433 * do the rest, if any.
436 rtp = (unsigned char *) tp;
437 rfp = (unsigned char *) fp;
447 /* Setup the Lance Rx and Tx rings */
448 static void lance_init_ring(struct net_device *dev)
450 struct lance_private *lp = netdev_priv(dev);
451 volatile u16 *ib = (volatile u16 *)dev->mem_start;
455 /* Lock out other processes while setting up hardware */
456 netif_stop_queue(dev);
457 lp->rx_new = lp->tx_new = 0;
458 lp->rx_old = lp->tx_old = 0;
460 /* Copy the ethernet address to the lance init block.
461 * XXX bit 0 of the physical address registers has to be zero
463 *lib_ptr(ib, phys_addr[0], lp->type) = (dev->dev_addr[1] << 8) |
465 *lib_ptr(ib, phys_addr[1], lp->type) = (dev->dev_addr[3] << 8) |
467 *lib_ptr(ib, phys_addr[2], lp->type) = (dev->dev_addr[5] << 8) |
469 /* Setup the initialization block */
471 /* Setup rx descriptor pointer */
472 leptr = offsetof(struct lance_init_block, brx_ring);
473 *lib_ptr(ib, rx_len, lp->type) = (LANCE_LOG_RX_BUFFERS << 13) |
475 *lib_ptr(ib, rx_ptr, lp->type) = leptr;
477 printk("RX ptr: %8.8x(%8.8x)\n",
478 leptr, lib_off(brx_ring, lp->type));
480 /* Setup tx descriptor pointer */
481 leptr = offsetof(struct lance_init_block, btx_ring);
482 *lib_ptr(ib, tx_len, lp->type) = (LANCE_LOG_TX_BUFFERS << 13) |
484 *lib_ptr(ib, tx_ptr, lp->type) = leptr;
486 printk("TX ptr: %8.8x(%8.8x)\n",
487 leptr, lib_off(btx_ring, lp->type));
490 printk("TX rings:\n");
492 /* Setup the Tx ring entries */
493 for (i = 0; i < TX_RING_SIZE; i++) {
494 leptr = lp->tx_buf_ptr_lnc[i];
495 *lib_ptr(ib, btx_ring[i].tmd0, lp->type) = leptr;
496 *lib_ptr(ib, btx_ring[i].tmd1, lp->type) = (leptr >> 16) &
498 *lib_ptr(ib, btx_ring[i].length, lp->type) = 0xf000;
499 /* The ones required by tmd2 */
500 *lib_ptr(ib, btx_ring[i].misc, lp->type) = 0;
502 printk("%d: 0x%8.8x(0x%8.8x)\n",
503 i, leptr, (uint)lp->tx_buf_ptr_cpu[i]);
506 /* Setup the Rx ring entries */
508 printk("RX rings:\n");
509 for (i = 0; i < RX_RING_SIZE; i++) {
510 leptr = lp->rx_buf_ptr_lnc[i];
511 *lib_ptr(ib, brx_ring[i].rmd0, lp->type) = leptr;
512 *lib_ptr(ib, brx_ring[i].rmd1, lp->type) = ((leptr >> 16) &
515 *lib_ptr(ib, brx_ring[i].length, lp->type) = -RX_BUFF_SIZE |
517 *lib_ptr(ib, brx_ring[i].mblength, lp->type) = 0;
519 printk("%d: 0x%8.8x(0x%8.8x)\n",
520 i, leptr, (uint)lp->rx_buf_ptr_cpu[i]);
525 static int init_restart_lance(struct lance_private *lp)
527 volatile struct lance_regs *ll = lp->ll;
530 writereg(&ll->rap, LE_CSR0);
531 writereg(&ll->rdp, LE_C0_INIT);
533 /* Wait for the lance to complete initialization */
534 for (i = 0; (i < 100) && !(ll->rdp & LE_C0_IDON); i++) {
537 if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
538 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
542 if ((ll->rdp & LE_C0_ERR)) {
543 printk("LANCE unopened after %d ticks, csr0=%4.4x.\n",
547 writereg(&ll->rdp, LE_C0_IDON);
548 writereg(&ll->rdp, LE_C0_STRT);
549 writereg(&ll->rdp, LE_C0_INEA);
554 static int lance_rx(struct net_device *dev)
556 struct lance_private *lp = netdev_priv(dev);
557 volatile u16 *ib = (volatile u16 *)dev->mem_start;
568 for (i = 0; i < RX_RING_SIZE; i++) {
570 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
572 LE_R1_OWN ? "_" : "X");
574 printk("%s", *lib_ptr(ib, brx_ring[i].rmd1,
576 LE_R1_OWN ? "." : "1");
582 for (rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type);
583 !((bits = *rds_ptr(rd, rmd1, lp->type)) & LE_R1_OWN);
584 rd = lib_ptr(ib, brx_ring[lp->rx_new], lp->type)) {
587 /* We got an incomplete frame? */
588 if ((bits & LE_R1_POK) != LE_R1_POK) {
589 dev->stats.rx_over_errors++;
590 dev->stats.rx_errors++;
591 } else if (bits & LE_R1_ERR) {
592 /* Count only the end frame as a rx error,
595 if (bits & LE_R1_BUF)
596 dev->stats.rx_fifo_errors++;
597 if (bits & LE_R1_CRC)
598 dev->stats.rx_crc_errors++;
599 if (bits & LE_R1_OFL)
600 dev->stats.rx_over_errors++;
601 if (bits & LE_R1_FRA)
602 dev->stats.rx_frame_errors++;
603 if (bits & LE_R1_EOP)
604 dev->stats.rx_errors++;
606 len = (*rds_ptr(rd, mblength, lp->type) & 0xfff) - 4;
607 skb = netdev_alloc_skb(dev, len + 2);
610 dev->stats.rx_dropped++;
611 *rds_ptr(rd, mblength, lp->type) = 0;
612 *rds_ptr(rd, rmd1, lp->type) =
613 ((lp->rx_buf_ptr_lnc[entry] >> 16) &
615 lp->rx_new = (entry + 1) & RX_RING_MOD_MASK;
618 dev->stats.rx_bytes += len;
620 skb_reserve(skb, 2); /* 16 byte align */
621 skb_put(skb, len); /* make room */
623 cp_from_buf(lp->type, skb->data,
624 lp->rx_buf_ptr_cpu[entry], len);
626 skb->protocol = eth_type_trans(skb, dev);
628 dev->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 dev->stats.tx_errors++;
664 if (status & LE_T3_RTY)
665 dev->stats.tx_aborted_errors++;
666 if (status & LE_T3_LCOL)
667 dev->stats.tx_window_errors++;
669 if (status & LE_T3_CLOS) {
670 dev->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 dev->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 dev->stats.collisions++;
707 /* More than one collision, be optimistic. */
708 if (*tds_ptr(td, tmd1, lp->type) & LE_T1_EMORE)
709 dev->stats.collisions += 2;
711 dev->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(int irq, void *dev_id)
726 struct net_device *dev = dev_id;
728 clear_ioasic_dma_irq(irq);
729 printk(KERN_ERR "%s: DMA error\n", dev->name);
733 static irqreturn_t lance_interrupt(int irq, void *dev_id)
735 struct net_device *dev = dev_id;
736 struct lance_private *lp = netdev_priv(dev);
737 volatile struct lance_regs *ll = lp->ll;
740 writereg(&ll->rap, LE_CSR0);
743 /* Acknowledge all the interrupt sources ASAP */
744 writereg(&ll->rdp, csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT));
746 if ((csr0 & LE_C0_ERR)) {
747 /* Clear the error condition */
748 writereg(&ll->rdp, LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
749 LE_C0_CERR | LE_C0_MERR);
751 if (csr0 & LE_C0_RINT)
754 if (csr0 & LE_C0_TINT)
757 if (csr0 & LE_C0_BABL)
758 dev->stats.tx_errors++;
760 if (csr0 & LE_C0_MISS)
761 dev->stats.rx_errors++;
763 if (csr0 & LE_C0_MERR) {
764 printk("%s: Memory error, status %04x\n", dev->name, csr0);
766 writereg(&ll->rdp, LE_C0_STOP);
768 lance_init_ring(dev);
770 init_restart_lance(lp);
771 netif_wake_queue(dev);
774 writereg(&ll->rdp, LE_C0_INEA);
775 writereg(&ll->rdp, LE_C0_INEA);
779 static int lance_open(struct net_device *dev)
781 volatile u16 *ib = (volatile u16 *)dev->mem_start;
782 struct lance_private *lp = netdev_priv(dev);
783 volatile struct lance_regs *ll = lp->ll;
787 writereg(&ll->rap, LE_CSR0);
788 writereg(&ll->rdp, LE_C0_STOP);
790 /* Set mode and clear multicast filter only at device open,
791 * so that lance_init_ring() called at any error will not
792 * forget multicast filters.
794 * BTW it is common bug in all lance drivers! --ANK
796 *lib_ptr(ib, mode, lp->type) = 0;
797 *lib_ptr(ib, filter[0], lp->type) = 0;
798 *lib_ptr(ib, filter[1], lp->type) = 0;
799 *lib_ptr(ib, filter[2], lp->type) = 0;
800 *lib_ptr(ib, filter[3], lp->type) = 0;
802 lance_init_ring(dev);
805 netif_start_queue(dev);
807 /* Associate IRQ with lance_interrupt */
808 if (request_irq(dev->irq, lance_interrupt, 0, "lance", dev)) {
809 printk("%s: Can't get IRQ %d\n", dev->name, dev->irq);
812 if (lp->dma_irq >= 0) {
815 if (request_irq(lp->dma_irq, lance_dma_merr_int, 0,
816 "lance error", dev)) {
817 free_irq(dev->irq, dev);
818 printk("%s: Can't get DMA IRQ %d\n", dev->name,
823 spin_lock_irqsave(&ioasic_ssr_lock, flags);
826 /* Enable I/O ASIC LANCE DMA. */
827 ioasic_write(IO_REG_SSR,
828 ioasic_read(IO_REG_SSR) | IO_SSR_LANCE_DMA_EN);
831 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
834 status = init_restart_lance(lp);
838 static int lance_close(struct net_device *dev)
840 struct lance_private *lp = netdev_priv(dev);
841 volatile struct lance_regs *ll = lp->ll;
843 netif_stop_queue(dev);
844 del_timer_sync(&lp->multicast_timer);
847 writereg(&ll->rap, LE_CSR0);
848 writereg(&ll->rdp, LE_C0_STOP);
850 if (lp->dma_irq >= 0) {
853 spin_lock_irqsave(&ioasic_ssr_lock, flags);
856 /* Disable I/O ASIC LANCE DMA. */
857 ioasic_write(IO_REG_SSR,
858 ioasic_read(IO_REG_SSR) & ~IO_SSR_LANCE_DMA_EN);
861 spin_unlock_irqrestore(&ioasic_ssr_lock, flags);
863 free_irq(lp->dma_irq, dev);
865 free_irq(dev->irq, dev);
869 static inline int lance_reset(struct net_device *dev)
871 struct lance_private *lp = netdev_priv(dev);
872 volatile struct lance_regs *ll = lp->ll;
876 writereg(&ll->rap, LE_CSR0);
877 writereg(&ll->rdp, LE_C0_STOP);
879 lance_init_ring(dev);
881 dev->trans_start = jiffies; /* prevent tx timeout */
882 status = init_restart_lance(lp);
886 static void lance_tx_timeout(struct net_device *dev)
888 struct lance_private *lp = netdev_priv(dev);
889 volatile struct lance_regs *ll = lp->ll;
891 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
894 netif_wake_queue(dev);
897 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
899 struct lance_private *lp = netdev_priv(dev);
900 volatile struct lance_regs *ll = lp->ll;
901 volatile u16 *ib = (volatile u16 *)dev->mem_start;
907 if (len < ETH_ZLEN) {
908 if (skb_padto(skb, ETH_ZLEN))
913 dev->stats.tx_bytes += len;
915 spin_lock_irqsave(&lp->lock, flags);
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, 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 spin_unlock_irqrestore(&lp->lock, flags);
942 static void lance_load_multicast(struct net_device *dev)
944 struct lance_private *lp = netdev_priv(dev);
945 volatile u16 *ib = (volatile u16 *)dev->mem_start;
946 struct netdev_hw_addr *ha;
949 /* set all multicast bits */
950 if (dev->flags & IFF_ALLMULTI) {
951 *lib_ptr(ib, filter[0], lp->type) = 0xffff;
952 *lib_ptr(ib, filter[1], lp->type) = 0xffff;
953 *lib_ptr(ib, filter[2], lp->type) = 0xffff;
954 *lib_ptr(ib, filter[3], lp->type) = 0xffff;
957 /* clear the multicast filter */
958 *lib_ptr(ib, filter[0], lp->type) = 0;
959 *lib_ptr(ib, filter[1], lp->type) = 0;
960 *lib_ptr(ib, filter[2], lp->type) = 0;
961 *lib_ptr(ib, filter[3], lp->type) = 0;
964 netdev_for_each_mc_addr(ha, dev) {
965 crc = ether_crc_le(ETH_ALEN, ha->addr);
967 *lib_ptr(ib, filter[crc >> 4], lp->type) |= 1 << (crc & 0xf);
971 static void lance_set_multicast(struct net_device *dev)
973 struct lance_private *lp = netdev_priv(dev);
974 volatile u16 *ib = (volatile u16 *)dev->mem_start;
975 volatile struct lance_regs *ll = lp->ll;
977 if (!netif_running(dev))
980 if (lp->tx_old != lp->tx_new) {
981 mod_timer(&lp->multicast_timer, jiffies + 4 * HZ/100);
982 netif_wake_queue(dev);
986 netif_stop_queue(dev);
988 writereg(&ll->rap, LE_CSR0);
989 writereg(&ll->rdp, LE_C0_STOP);
991 lance_init_ring(dev);
993 if (dev->flags & IFF_PROMISC) {
994 *lib_ptr(ib, mode, lp->type) |= LE_MO_PROM;
996 *lib_ptr(ib, mode, lp->type) &= ~LE_MO_PROM;
997 lance_load_multicast(dev);
1000 init_restart_lance(lp);
1001 netif_wake_queue(dev);
1004 static void lance_set_multicast_retry(unsigned long _opaque)
1006 struct net_device *dev = (struct net_device *) _opaque;
1008 lance_set_multicast(dev);
1011 static const struct net_device_ops lance_netdev_ops = {
1012 .ndo_open = lance_open,
1013 .ndo_stop = lance_close,
1014 .ndo_start_xmit = lance_start_xmit,
1015 .ndo_tx_timeout = lance_tx_timeout,
1016 .ndo_set_rx_mode = lance_set_multicast,
1017 .ndo_change_mtu = eth_change_mtu,
1018 .ndo_validate_addr = eth_validate_addr,
1019 .ndo_set_mac_address = eth_mac_addr,
1022 static int dec_lance_probe(struct device *bdev, const int type)
1024 static unsigned version_printed;
1025 static const char fmt[] = "declance%d";
1027 struct net_device *dev;
1028 struct lance_private *lp;
1029 volatile struct lance_regs *ll;
1030 resource_size_t start = 0, len = 0;
1032 unsigned long esar_base;
1033 unsigned char *esar;
1035 if (dec_lance_debug && version_printed++ == 0)
1039 snprintf(name, sizeof(name), "%s", dev_name(bdev));
1042 dev = root_lance_dev;
1045 lp = netdev_priv(dev);
1048 snprintf(name, sizeof(name), fmt, i);
1051 dev = alloc_etherdev(sizeof(struct lance_private));
1058 * alloc_etherdev ensures the data structures used by the LANCE
1061 lp = netdev_priv(dev);
1062 spin_lock_init(&lp->lock);
1067 dev->base_addr = CKSEG1ADDR(dec_kn_slot_base + IOASIC_LANCE);
1069 /* buffer space for the on-board LANCE shared memory */
1073 dev->mem_start = CKSEG1ADDR(0x00020000);
1074 dev->mem_end = dev->mem_start + 0x00020000;
1075 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1076 esar_base = CKSEG1ADDR(dec_kn_slot_base + IOASIC_ESAR);
1078 /* Workaround crash with booting KN04 2.1k from Disk */
1079 memset((void *)dev->mem_start, 0,
1080 dev->mem_end - dev->mem_start);
1083 * setup the pointer arrays, this sucks [tm] :-(
1085 for (i = 0; i < RX_RING_SIZE; i++) {
1086 lp->rx_buf_ptr_cpu[i] =
1087 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1088 2 * i * RX_BUFF_SIZE);
1089 lp->rx_buf_ptr_lnc[i] =
1090 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1092 for (i = 0; i < TX_RING_SIZE; i++) {
1093 lp->tx_buf_ptr_cpu[i] =
1094 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1095 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1096 2 * i * TX_BUFF_SIZE);
1097 lp->tx_buf_ptr_lnc[i] =
1099 RX_RING_SIZE * RX_BUFF_SIZE +
1103 /* Setup I/O ASIC LANCE DMA. */
1104 lp->dma_irq = dec_interrupt[DEC_IRQ_LANCE_MERR];
1105 ioasic_write(IO_REG_LANCE_DMA_P,
1106 CPHYSADDR(dev->mem_start) << 3);
1111 dev_set_drvdata(bdev, dev);
1113 start = to_tc_dev(bdev)->resource.start;
1114 len = to_tc_dev(bdev)->resource.end - start + 1;
1115 if (!request_mem_region(start, len, dev_name(bdev))) {
1117 "%s: Unable to reserve MMIO resource\n",
1123 dev->mem_start = CKSEG1ADDR(start);
1124 dev->mem_end = dev->mem_start + 0x100000;
1125 dev->base_addr = dev->mem_start + 0x100000;
1126 dev->irq = to_tc_dev(bdev)->interrupt;
1127 esar_base = dev->mem_start + 0x1c0002;
1130 for (i = 0; i < RX_RING_SIZE; i++) {
1131 lp->rx_buf_ptr_cpu[i] =
1132 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1134 lp->rx_buf_ptr_lnc[i] =
1135 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1137 for (i = 0; i < TX_RING_SIZE; i++) {
1138 lp->tx_buf_ptr_cpu[i] =
1139 (char *)(dev->mem_start + BUF_OFFSET_CPU +
1140 RX_RING_SIZE * RX_BUFF_SIZE +
1142 lp->tx_buf_ptr_lnc[i] =
1144 RX_RING_SIZE * RX_BUFF_SIZE +
1151 dev->irq = dec_interrupt[DEC_IRQ_LANCE];
1152 dev->base_addr = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE);
1153 dev->mem_start = CKSEG1ADDR(KN01_SLOT_BASE + KN01_LANCE_MEM);
1154 dev->mem_end = dev->mem_start + KN01_SLOT_SIZE;
1155 esar_base = CKSEG1ADDR(KN01_SLOT_BASE + KN01_ESAR + 1);
1159 * setup the pointer arrays, this sucks [tm] :-(
1161 for (i = 0; i < RX_RING_SIZE; i++) {
1162 lp->rx_buf_ptr_cpu[i] =
1163 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1164 2 * i * RX_BUFF_SIZE);
1165 lp->rx_buf_ptr_lnc[i] =
1166 (BUF_OFFSET_LNC + i * RX_BUFF_SIZE);
1168 for (i = 0; i < TX_RING_SIZE; i++) {
1169 lp->tx_buf_ptr_cpu[i] =
1170 (char *)(dev->mem_start + 2 * BUF_OFFSET_CPU +
1171 2 * RX_RING_SIZE * RX_BUFF_SIZE +
1172 2 * i * TX_BUFF_SIZE);
1173 lp->tx_buf_ptr_lnc[i] =
1175 RX_RING_SIZE * RX_BUFF_SIZE +
1182 printk(KERN_ERR "%s: declance_init called with unknown type\n",
1188 ll = (struct lance_regs *) dev->base_addr;
1189 esar = (unsigned char *) esar_base;
1192 /* First, check for test pattern */
1193 if (esar[0x60] != 0xff && esar[0x64] != 0x00 &&
1194 esar[0x68] != 0x55 && esar[0x6c] != 0xaa) {
1196 "%s: Ethernet station address prom not found!\n",
1199 goto err_out_resource;
1201 /* Check the prom contents */
1202 for (i = 0; i < 8; i++) {
1203 if (esar[i * 4] != esar[0x3c - i * 4] &&
1204 esar[i * 4] != esar[0x40 + i * 4] &&
1205 esar[0x3c - i * 4] != esar[0x40 + i * 4]) {
1206 printk(KERN_ERR "%s: Something is wrong with the "
1207 "ethernet station address prom!\n", name);
1209 goto err_out_resource;
1213 /* Copy the ethernet address to the device structure, later to the
1214 * lance initialization block so the lance gets it every time it's
1219 printk("%s: IOASIC onboard LANCE", name);
1222 printk("%s: PMAD-AA", name);
1225 printk("%s: PMAX onboard LANCE", name);
1228 for (i = 0; i < 6; i++)
1229 dev->dev_addr[i] = esar[i * 4];
1231 printk(", addr = %pM, irq = %d\n", dev->dev_addr, dev->irq);
1233 dev->netdev_ops = &lance_netdev_ops;
1234 dev->watchdog_timeo = 5*HZ;
1236 /* lp->ll is the location of the registers for lance card */
1239 /* busmaster_regval (CSR3) should be zero according to the PMAD-AA
1242 lp->busmaster_regval = 0;
1246 /* We cannot sleep if the chip is busy during a
1247 * multicast list update event, because such events
1248 * can occur from interrupts (ex. IPv6). So we
1249 * use a timer to try again later when necessary. -DaveM
1251 init_timer(&lp->multicast_timer);
1252 lp->multicast_timer.data = (unsigned long) dev;
1253 lp->multicast_timer.function = lance_set_multicast_retry;
1255 ret = register_netdev(dev);
1258 "%s: Unable to register netdev, aborting.\n", name);
1259 goto err_out_resource;
1263 lp->next = root_lance_dev;
1264 root_lance_dev = dev;
1267 printk("%s: registered as %s.\n", name, dev->name);
1272 release_mem_region(start, len);
1281 static void __exit dec_lance_remove(struct device *bdev)
1283 struct net_device *dev = dev_get_drvdata(bdev);
1284 resource_size_t start, len;
1286 unregister_netdev(dev);
1287 start = to_tc_dev(bdev)->resource.start;
1288 len = to_tc_dev(bdev)->resource.end - start + 1;
1289 release_mem_region(start, len);
1293 /* Find all the lance cards on the system and initialize them */
1294 static int __init dec_lance_platform_probe(void)
1298 if (dec_interrupt[DEC_IRQ_LANCE] >= 0) {
1299 if (dec_interrupt[DEC_IRQ_LANCE_MERR] >= 0) {
1300 if (dec_lance_probe(NULL, ASIC_LANCE) >= 0)
1302 } else if (!TURBOCHANNEL) {
1303 if (dec_lance_probe(NULL, PMAX_LANCE) >= 0)
1308 return (count > 0) ? 0 : -ENODEV;
1311 static void __exit dec_lance_platform_remove(void)
1313 while (root_lance_dev) {
1314 struct net_device *dev = root_lance_dev;
1315 struct lance_private *lp = netdev_priv(dev);
1317 unregister_netdev(dev);
1318 root_lance_dev = lp->next;
1324 static int dec_lance_tc_probe(struct device *dev);
1325 static int __exit dec_lance_tc_remove(struct device *dev);
1327 static const struct tc_device_id dec_lance_tc_table[] = {
1328 { "DEC ", "PMAD-AA " },
1331 MODULE_DEVICE_TABLE(tc, dec_lance_tc_table);
1333 static struct tc_driver dec_lance_tc_driver = {
1334 .id_table = dec_lance_tc_table,
1337 .bus = &tc_bus_type,
1338 .probe = dec_lance_tc_probe,
1339 .remove = __exit_p(dec_lance_tc_remove),
1343 static int dec_lance_tc_probe(struct device *dev)
1345 int status = dec_lance_probe(dev, PMAD_LANCE);
1351 static int __exit dec_lance_tc_remove(struct device *dev)
1354 dec_lance_remove(dev);
1359 static int __init dec_lance_init(void)
1363 status = tc_register_driver(&dec_lance_tc_driver);
1365 dec_lance_platform_probe();
1369 static void __exit dec_lance_exit(void)
1371 dec_lance_platform_remove();
1372 tc_unregister_driver(&dec_lance_tc_driver);
1376 module_init(dec_lance_init);
1377 module_exit(dec_lance_exit);