1 /* $Id: sunlance.c,v 1.112 2002/01/15 06:48:55 davem Exp $
2 * lance.c: Linux/Sparc/Lance driver
4 * Written 1995, 1996 by Miguel de Icaza
6 * The Linux depca driver
7 * The Linux lance driver.
8 * The Linux skeleton driver.
9 * The NetBSD Sparc/Lance driver.
10 * Theo de Raadt (deraadt@openbsd.org)
11 * NCR92C990 Lan Controller manual
14 * Added support to run with a ledma on the Sun4m
17 * Added multiple card detection.
19 * 4/17/96: Burst sizes and tpe selection on sun4m by Eddie C. Dost
22 * 5/15/96: auto carrier detection on sun4m by Eddie C. Dost
25 * 5/17/96: lebuffer on scsi/ether cards now work David S. Miller
26 * (davem@caip.rutgers.edu)
28 * 5/29/96: override option 'tpe-link-test?', if it is 'false', as
29 * this disables auto carrier detection on sun4m. Eddie C. Dost
33 * 6/26/96: Bug fix for multiple ledmas, miguel.
36 * Stole multicast code from depca.c, fixed lance_tx.
39 * 8/21/96: Fixed the multicast code (Pedro Roque)
41 * 8/28/96: Send fake packet in lance_open() if auto_select is true,
42 * so we can detect the carrier loss condition in time.
43 * Eddie C. Dost (ecd@skynet.be)
45 * 9/15/96: Align rx_buf so that eth_copy_and_sum() won't cause an
46 * MNA trap during chksum_partial_copy(). (ecd@skynet.be)
48 * 11/17/96: Handle LE_C0_MERR in lance_interrupt(). (ecd@skynet.be)
50 * 12/22/96: Don't loop forever in lance_rx() on incomplete packets.
51 * This was the sun4c killer. Shit, stupid bug.
55 * 1/26/97: Modularize driver. (ecd@skynet.be)
58 * 12/27/97: Added sun4d support. (jj@sunsite.mff.cuni.cz)
61 * 11/3/99: Fixed SMP race in lance_start_xmit found by davem.
62 * Anton Blanchard (anton@progsoc.uts.edu.au)
63 * 2.00: 11/9/99: Massive overhaul and port to new SBUS driver interfaces.
64 * David S. Miller (davem@redhat.com)
66 * 11/08/01: Use library crc32 functions (Matt_Domsch@dell.com)
72 static char lancestr[] = "LANCE";
74 #include <linux/module.h>
75 #include <linux/kernel.h>
76 #include <linux/types.h>
77 #include <linux/fcntl.h>
78 #include <linux/interrupt.h>
79 #include <linux/ioport.h>
81 #include <linux/string.h>
82 #include <linux/delay.h>
83 #include <linux/init.h>
84 #include <linux/crc32.h>
85 #include <linux/errno.h>
86 #include <linux/socket.h> /* Used for the temporal inet entries and routing */
87 #include <linux/route.h>
88 #include <linux/netdevice.h>
89 #include <linux/etherdevice.h>
90 #include <linux/skbuff.h>
91 #include <linux/ethtool.h>
92 #include <linux/bitops.h>
93 #include <linux/dma-mapping.h>
95 #include <linux/of_device.h>
96 #include <linux/gfp.h>
100 #include <asm/pgtable.h>
101 #include <asm/byteorder.h> /* Used by the checksum routines */
102 #include <asm/idprom.h>
103 #include <asm/prom.h>
104 #include <asm/auxio.h> /* For tpe-link-test? setting */
107 #define DRV_NAME "sunlance"
108 #define DRV_VERSION "2.02"
109 #define DRV_RELDATE "8/24/03"
110 #define DRV_AUTHOR "Miguel de Icaza (miguel@nuclecu.unam.mx)"
112 static char version[] =
113 DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n";
115 MODULE_VERSION(DRV_VERSION);
116 MODULE_AUTHOR(DRV_AUTHOR);
117 MODULE_DESCRIPTION("Sun Lance ethernet driver");
118 MODULE_LICENSE("GPL");
120 /* Define: 2^4 Tx buffers and 2^4 Rx buffers */
121 #ifndef LANCE_LOG_TX_BUFFERS
122 #define LANCE_LOG_TX_BUFFERS 4
123 #define LANCE_LOG_RX_BUFFERS 4
131 #define LE_MO_PROM 0x8000 /* Enable promiscuous mode */
133 #define LE_C0_ERR 0x8000 /* Error: set if BAB, SQE, MISS or ME is set */
134 #define LE_C0_BABL 0x4000 /* BAB: Babble: tx timeout. */
135 #define LE_C0_CERR 0x2000 /* SQE: Signal quality error */
136 #define LE_C0_MISS 0x1000 /* MISS: Missed a packet */
137 #define LE_C0_MERR 0x0800 /* ME: Memory error */
138 #define LE_C0_RINT 0x0400 /* Received interrupt */
139 #define LE_C0_TINT 0x0200 /* Transmitter Interrupt */
140 #define LE_C0_IDON 0x0100 /* IFIN: Init finished. */
141 #define LE_C0_INTR 0x0080 /* Interrupt or error */
142 #define LE_C0_INEA 0x0040 /* Interrupt enable */
143 #define LE_C0_RXON 0x0020 /* Receiver on */
144 #define LE_C0_TXON 0x0010 /* Transmitter on */
145 #define LE_C0_TDMD 0x0008 /* Transmitter demand */
146 #define LE_C0_STOP 0x0004 /* Stop the card */
147 #define LE_C0_STRT 0x0002 /* Start the card */
148 #define LE_C0_INIT 0x0001 /* Init the card */
150 #define LE_C3_BSWP 0x4 /* SWAP */
151 #define LE_C3_ACON 0x2 /* ALE Control */
152 #define LE_C3_BCON 0x1 /* Byte control */
154 /* Receive message descriptor 1 */
155 #define LE_R1_OWN 0x80 /* Who owns the entry */
156 #define LE_R1_ERR 0x40 /* Error: if FRA, OFL, CRC or BUF is set */
157 #define LE_R1_FRA 0x20 /* FRA: Frame error */
158 #define LE_R1_OFL 0x10 /* OFL: Frame overflow */
159 #define LE_R1_CRC 0x08 /* CRC error */
160 #define LE_R1_BUF 0x04 /* BUF: Buffer error */
161 #define LE_R1_SOP 0x02 /* Start of packet */
162 #define LE_R1_EOP 0x01 /* End of packet */
163 #define LE_R1_POK 0x03 /* Packet is complete: SOP + EOP */
165 #define LE_T1_OWN 0x80 /* Lance owns the packet */
166 #define LE_T1_ERR 0x40 /* Error summary */
167 #define LE_T1_EMORE 0x10 /* Error: more than one retry needed */
168 #define LE_T1_EONE 0x08 /* Error: one retry needed */
169 #define LE_T1_EDEF 0x04 /* Error: deferred */
170 #define LE_T1_SOP 0x02 /* Start of packet */
171 #define LE_T1_EOP 0x01 /* End of packet */
172 #define LE_T1_POK 0x03 /* Packet is complete: SOP + EOP */
174 #define LE_T3_BUF 0x8000 /* Buffer error */
175 #define LE_T3_UFL 0x4000 /* Error underflow */
176 #define LE_T3_LCOL 0x1000 /* Error late collision */
177 #define LE_T3_CLOS 0x0800 /* Error carrier loss */
178 #define LE_T3_RTY 0x0400 /* Error retry */
179 #define LE_T3_TDR 0x03ff /* Time Domain Reflectometry counter */
181 #define TX_RING_SIZE (1 << (LANCE_LOG_TX_BUFFERS))
182 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
183 #define TX_RING_LEN_BITS ((LANCE_LOG_TX_BUFFERS) << 29)
184 #define TX_NEXT(__x) (((__x)+1) & TX_RING_MOD_MASK)
186 #define RX_RING_SIZE (1 << (LANCE_LOG_RX_BUFFERS))
187 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
188 #define RX_RING_LEN_BITS ((LANCE_LOG_RX_BUFFERS) << 29)
189 #define RX_NEXT(__x) (((__x)+1) & RX_RING_MOD_MASK)
191 #define PKT_BUF_SZ 1544
192 #define RX_BUFF_SIZE PKT_BUF_SZ
193 #define TX_BUFF_SIZE PKT_BUF_SZ
195 struct lance_rx_desc {
196 u16 rmd0; /* low address of packet */
197 u8 rmd1_bits; /* descriptor bits */
198 u8 rmd1_hadr; /* high address of packet */
199 s16 length; /* This length is 2s complement (negative)!
202 u16 mblength; /* This is the actual number of bytes received */
205 struct lance_tx_desc {
206 u16 tmd0; /* low address of packet */
207 u8 tmd1_bits; /* descriptor bits */
208 u8 tmd1_hadr; /* high address of packet */
209 s16 length; /* Length is 2s complement (negative)! */
213 /* The LANCE initialization block, described in databook. */
214 /* On the Sparc, this block should be on a DMA region */
215 struct lance_init_block {
216 u16 mode; /* Pre-set mode (reg. 15) */
217 u8 phys_addr[6]; /* Physical ethernet address */
218 u32 filter[2]; /* Multicast filter. */
220 /* Receive and transmit ring base, along with extra bits. */
221 u16 rx_ptr; /* receive descriptor addr */
222 u16 rx_len; /* receive len and high addr */
223 u16 tx_ptr; /* transmit descriptor addr */
224 u16 tx_len; /* transmit len and high addr */
226 /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
227 struct lance_rx_desc brx_ring[RX_RING_SIZE];
228 struct lance_tx_desc btx_ring[TX_RING_SIZE];
230 u8 tx_buf [TX_RING_SIZE][TX_BUFF_SIZE];
231 u8 pad[2]; /* align rx_buf for copy_and_sum(). */
232 u8 rx_buf [RX_RING_SIZE][RX_BUFF_SIZE];
235 #define libdesc_offset(rt, elem) \
236 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem])))))
238 #define libbuff_offset(rt, elem) \
239 ((__u32)(((unsigned long)(&(((struct lance_init_block *)0)->rt[elem][0])))))
241 struct lance_private {
242 void __iomem *lregs; /* Lance RAP/RDP regs. */
243 void __iomem *dregs; /* DMA controller regs. */
244 struct lance_init_block __iomem *init_block_iomem;
245 struct lance_init_block *init_block_mem;
252 struct platform_device *ledma; /* If set this points to ledma */
253 char tpe; /* cable-selection is TPE */
254 char auto_select; /* cable-selection by carrier */
255 char burst_sizes; /* ledma SBus burst sizes */
256 char pio_buffer; /* init block in PIO space? */
258 unsigned short busmaster_regval;
260 void (*init_ring)(struct net_device *);
261 void (*rx)(struct net_device *);
262 void (*tx)(struct net_device *);
265 dma_addr_t init_block_dvma;
266 struct net_device *dev; /* Backpointer */
267 struct platform_device *op;
268 struct platform_device *lebuffer;
269 struct timer_list multicast_timer;
272 #define TX_BUFFS_AVAIL ((lp->tx_old<=lp->tx_new)?\
273 lp->tx_old+TX_RING_MOD_MASK-lp->tx_new:\
274 lp->tx_old - lp->tx_new-1)
276 /* Lance registers. */
277 #define RDP 0x00UL /* register data port */
278 #define RAP 0x02UL /* register address port */
279 #define LANCE_REG_SIZE 0x04UL
281 #define STOP_LANCE(__lp) \
282 do { void __iomem *__base = (__lp)->lregs; \
283 sbus_writew(LE_CSR0, __base + RAP); \
284 sbus_writew(LE_C0_STOP, __base + RDP); \
287 int sparc_lance_debug = 2;
289 /* The Lance uses 24 bit addresses */
290 /* On the Sun4c the DVMA will provide the remaining bytes for us */
291 /* On the Sun4m we have to instruct the ledma to provide them */
292 /* Even worse, on scsi/ether SBUS cards, the init block and the
293 * transmit/receive buffers are addresses as offsets from absolute
294 * zero on the lebuffer PIO area. -DaveM
297 #define LANCE_ADDR(x) ((long)(x) & ~0xff000000)
299 /* Load the CSR registers */
300 static void load_csrs(struct lance_private *lp)
307 leptr = LANCE_ADDR(lp->init_block_dvma);
309 sbus_writew(LE_CSR1, lp->lregs + RAP);
310 sbus_writew(leptr & 0xffff, lp->lregs + RDP);
311 sbus_writew(LE_CSR2, lp->lregs + RAP);
312 sbus_writew(leptr >> 16, lp->lregs + RDP);
313 sbus_writew(LE_CSR3, lp->lregs + RAP);
314 sbus_writew(lp->busmaster_regval, lp->lregs + RDP);
316 /* Point back to csr0 */
317 sbus_writew(LE_CSR0, lp->lregs + RAP);
320 /* Setup the Lance Rx and Tx rings */
321 static void lance_init_ring_dvma(struct net_device *dev)
323 struct lance_private *lp = netdev_priv(dev);
324 struct lance_init_block *ib = lp->init_block_mem;
325 dma_addr_t aib = lp->init_block_dvma;
329 /* Lock out other processes while setting up hardware */
330 netif_stop_queue(dev);
331 lp->rx_new = lp->tx_new = 0;
332 lp->rx_old = lp->tx_old = 0;
334 /* Copy the ethernet address to the lance init block
335 * Note that on the sparc you need to swap the ethernet address.
337 ib->phys_addr [0] = dev->dev_addr [1];
338 ib->phys_addr [1] = dev->dev_addr [0];
339 ib->phys_addr [2] = dev->dev_addr [3];
340 ib->phys_addr [3] = dev->dev_addr [2];
341 ib->phys_addr [4] = dev->dev_addr [5];
342 ib->phys_addr [5] = dev->dev_addr [4];
344 /* Setup the Tx ring entries */
345 for (i = 0; i < TX_RING_SIZE; i++) {
346 leptr = LANCE_ADDR(aib + libbuff_offset(tx_buf, i));
347 ib->btx_ring [i].tmd0 = leptr;
348 ib->btx_ring [i].tmd1_hadr = leptr >> 16;
349 ib->btx_ring [i].tmd1_bits = 0;
350 ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */
351 ib->btx_ring [i].misc = 0;
354 /* Setup the Rx ring entries */
355 for (i = 0; i < RX_RING_SIZE; i++) {
356 leptr = LANCE_ADDR(aib + libbuff_offset(rx_buf, i));
358 ib->brx_ring [i].rmd0 = leptr;
359 ib->brx_ring [i].rmd1_hadr = leptr >> 16;
360 ib->brx_ring [i].rmd1_bits = LE_R1_OWN;
361 ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000;
362 ib->brx_ring [i].mblength = 0;
365 /* Setup the initialization block */
367 /* Setup rx descriptor pointer */
368 leptr = LANCE_ADDR(aib + libdesc_offset(brx_ring, 0));
369 ib->rx_len = (LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16);
372 /* Setup tx descriptor pointer */
373 leptr = LANCE_ADDR(aib + libdesc_offset(btx_ring, 0));
374 ib->tx_len = (LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16);
378 static void lance_init_ring_pio(struct net_device *dev)
380 struct lance_private *lp = netdev_priv(dev);
381 struct lance_init_block __iomem *ib = lp->init_block_iomem;
385 /* Lock out other processes while setting up hardware */
386 netif_stop_queue(dev);
387 lp->rx_new = lp->tx_new = 0;
388 lp->rx_old = lp->tx_old = 0;
390 /* Copy the ethernet address to the lance init block
391 * Note that on the sparc you need to swap the ethernet address.
393 sbus_writeb(dev->dev_addr[1], &ib->phys_addr[0]);
394 sbus_writeb(dev->dev_addr[0], &ib->phys_addr[1]);
395 sbus_writeb(dev->dev_addr[3], &ib->phys_addr[2]);
396 sbus_writeb(dev->dev_addr[2], &ib->phys_addr[3]);
397 sbus_writeb(dev->dev_addr[5], &ib->phys_addr[4]);
398 sbus_writeb(dev->dev_addr[4], &ib->phys_addr[5]);
400 /* Setup the Tx ring entries */
401 for (i = 0; i < TX_RING_SIZE; i++) {
402 leptr = libbuff_offset(tx_buf, i);
403 sbus_writew(leptr, &ib->btx_ring [i].tmd0);
404 sbus_writeb(leptr >> 16,&ib->btx_ring [i].tmd1_hadr);
405 sbus_writeb(0, &ib->btx_ring [i].tmd1_bits);
407 /* The ones required by tmd2 */
408 sbus_writew(0xf000, &ib->btx_ring [i].length);
409 sbus_writew(0, &ib->btx_ring [i].misc);
412 /* Setup the Rx ring entries */
413 for (i = 0; i < RX_RING_SIZE; i++) {
414 leptr = libbuff_offset(rx_buf, i);
416 sbus_writew(leptr, &ib->brx_ring [i].rmd0);
417 sbus_writeb(leptr >> 16,&ib->brx_ring [i].rmd1_hadr);
418 sbus_writeb(LE_R1_OWN, &ib->brx_ring [i].rmd1_bits);
419 sbus_writew(-RX_BUFF_SIZE|0xf000,
420 &ib->brx_ring [i].length);
421 sbus_writew(0, &ib->brx_ring [i].mblength);
424 /* Setup the initialization block */
426 /* Setup rx descriptor pointer */
427 leptr = libdesc_offset(brx_ring, 0);
428 sbus_writew((LANCE_LOG_RX_BUFFERS << 13) | (leptr >> 16),
430 sbus_writew(leptr, &ib->rx_ptr);
432 /* Setup tx descriptor pointer */
433 leptr = libdesc_offset(btx_ring, 0);
434 sbus_writew((LANCE_LOG_TX_BUFFERS << 13) | (leptr >> 16),
436 sbus_writew(leptr, &ib->tx_ptr);
439 static void init_restart_ledma(struct lance_private *lp)
441 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
443 if (!(csr & DMA_HNDL_ERROR)) {
444 /* E-Cache draining */
445 while (sbus_readl(lp->dregs + DMA_CSR) & DMA_FIFO_ISDRAIN)
449 csr = sbus_readl(lp->dregs + DMA_CSR);
450 csr &= ~DMA_E_BURSTS;
451 if (lp->burst_sizes & DMA_BURST32)
452 csr |= DMA_E_BURST32;
454 csr |= DMA_E_BURST16;
456 csr |= (DMA_DSBL_RD_DRN | DMA_DSBL_WR_INV | DMA_FIFO_INV);
459 csr |= DMA_EN_ENETAUI;
461 csr &= ~DMA_EN_ENETAUI;
463 sbus_writel(csr, lp->dregs + DMA_CSR);
467 static int init_restart_lance(struct lance_private *lp)
473 init_restart_ledma(lp);
475 sbus_writew(LE_CSR0, lp->lregs + RAP);
476 sbus_writew(LE_C0_INIT, lp->lregs + RDP);
478 /* Wait for the lance to complete initialization */
479 for (i = 0; i < 100; i++) {
480 regval = sbus_readw(lp->lregs + RDP);
482 if (regval & (LE_C0_ERR | LE_C0_IDON))
486 if (i == 100 || (regval & LE_C0_ERR)) {
487 printk(KERN_ERR "LANCE unopened after %d ticks, csr0=%4.4x.\n",
490 printk("dcsr=%8.8x\n", sbus_readl(lp->dregs + DMA_CSR));
494 /* Clear IDON by writing a "1", enable interrupts and start lance */
495 sbus_writew(LE_C0_IDON, lp->lregs + RDP);
496 sbus_writew(LE_C0_INEA | LE_C0_STRT, lp->lregs + RDP);
499 u32 csr = sbus_readl(lp->dregs + DMA_CSR);
502 sbus_writel(csr, lp->dregs + DMA_CSR);
508 static void lance_rx_dvma(struct net_device *dev)
510 struct lance_private *lp = netdev_priv(dev);
511 struct lance_init_block *ib = lp->init_block_mem;
512 struct lance_rx_desc *rd;
514 int len, entry = lp->rx_new;
517 for (rd = &ib->brx_ring [entry];
518 !((bits = rd->rmd1_bits) & LE_R1_OWN);
519 rd = &ib->brx_ring [entry]) {
521 /* We got an incomplete frame? */
522 if ((bits & LE_R1_POK) != LE_R1_POK) {
523 dev->stats.rx_over_errors++;
524 dev->stats.rx_errors++;
525 } else if (bits & LE_R1_ERR) {
526 /* Count only the end frame as a rx error,
529 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
530 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
531 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
532 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
533 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
535 len = (rd->mblength & 0xfff) - 4;
536 skb = netdev_alloc_skb(dev, len + 2);
539 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
541 dev->stats.rx_dropped++;
543 rd->rmd1_bits = LE_R1_OWN;
544 lp->rx_new = RX_NEXT(entry);
548 dev->stats.rx_bytes += len;
550 skb_reserve(skb, 2); /* 16 byte align */
551 skb_put(skb, len); /* make room */
552 skb_copy_to_linear_data(skb,
553 (unsigned char *)&(ib->rx_buf [entry][0]),
555 skb->protocol = eth_type_trans(skb, dev);
557 dev->stats.rx_packets++;
560 /* Return the packet to the pool */
562 rd->rmd1_bits = LE_R1_OWN;
563 entry = RX_NEXT(entry);
569 static void lance_tx_dvma(struct net_device *dev)
571 struct lance_private *lp = netdev_priv(dev);
572 struct lance_init_block *ib = lp->init_block_mem;
575 spin_lock(&lp->lock);
578 for (i = j; i != lp->tx_new; i = j) {
579 struct lance_tx_desc *td = &ib->btx_ring [i];
580 u8 bits = td->tmd1_bits;
582 /* If we hit a packet not owned by us, stop */
583 if (bits & LE_T1_OWN)
586 if (bits & LE_T1_ERR) {
587 u16 status = td->misc;
589 dev->stats.tx_errors++;
590 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
591 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
593 if (status & LE_T3_CLOS) {
594 dev->stats.tx_carrier_errors++;
595 if (lp->auto_select) {
596 lp->tpe = 1 - lp->tpe;
597 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
598 dev->name, lp->tpe?"TPE":"AUI");
602 init_restart_lance(lp);
607 /* Buffer errors and underflows turn off the
608 * transmitter, restart the adapter.
610 if (status & (LE_T3_BUF|LE_T3_UFL)) {
611 dev->stats.tx_fifo_errors++;
613 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
618 init_restart_lance(lp);
621 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
623 * So we don't count the packet more than once.
625 td->tmd1_bits = bits & ~(LE_T1_POK);
627 /* One collision before packet was sent. */
628 if (bits & LE_T1_EONE)
629 dev->stats.collisions++;
631 /* More than one collision, be optimistic. */
632 if (bits & LE_T1_EMORE)
633 dev->stats.collisions += 2;
635 dev->stats.tx_packets++;
642 if (netif_queue_stopped(dev) &&
644 netif_wake_queue(dev);
646 spin_unlock(&lp->lock);
649 static void lance_piocopy_to_skb(struct sk_buff *skb, void __iomem *piobuf, int len)
651 u16 *p16 = (u16 *) skb->data;
654 void __iomem *pbuf = piobuf;
656 /* We know here that both src and dest are on a 16bit boundary. */
657 *p16++ = sbus_readw(pbuf);
663 *p32++ = sbus_readl(pbuf);
670 *p16++ = sbus_readw(pbuf);
676 *p8 = sbus_readb(pbuf);
679 static void lance_rx_pio(struct net_device *dev)
681 struct lance_private *lp = netdev_priv(dev);
682 struct lance_init_block __iomem *ib = lp->init_block_iomem;
683 struct lance_rx_desc __iomem *rd;
689 for (rd = &ib->brx_ring [entry];
690 !((bits = sbus_readb(&rd->rmd1_bits)) & LE_R1_OWN);
691 rd = &ib->brx_ring [entry]) {
693 /* We got an incomplete frame? */
694 if ((bits & LE_R1_POK) != LE_R1_POK) {
695 dev->stats.rx_over_errors++;
696 dev->stats.rx_errors++;
697 } else if (bits & LE_R1_ERR) {
698 /* Count only the end frame as a rx error,
701 if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++;
702 if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++;
703 if (bits & LE_R1_OFL) dev->stats.rx_over_errors++;
704 if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++;
705 if (bits & LE_R1_EOP) dev->stats.rx_errors++;
707 len = (sbus_readw(&rd->mblength) & 0xfff) - 4;
708 skb = netdev_alloc_skb(dev, len + 2);
711 printk(KERN_INFO "%s: Memory squeeze, deferring packet.\n",
713 dev->stats.rx_dropped++;
714 sbus_writew(0, &rd->mblength);
715 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
716 lp->rx_new = RX_NEXT(entry);
720 dev->stats.rx_bytes += len;
722 skb_reserve (skb, 2); /* 16 byte align */
723 skb_put(skb, len); /* make room */
724 lance_piocopy_to_skb(skb, &(ib->rx_buf[entry][0]), len);
725 skb->protocol = eth_type_trans(skb, dev);
727 dev->stats.rx_packets++;
730 /* Return the packet to the pool */
731 sbus_writew(0, &rd->mblength);
732 sbus_writeb(LE_R1_OWN, &rd->rmd1_bits);
733 entry = RX_NEXT(entry);
739 static void lance_tx_pio(struct net_device *dev)
741 struct lance_private *lp = netdev_priv(dev);
742 struct lance_init_block __iomem *ib = lp->init_block_iomem;
745 spin_lock(&lp->lock);
748 for (i = j; i != lp->tx_new; i = j) {
749 struct lance_tx_desc __iomem *td = &ib->btx_ring [i];
750 u8 bits = sbus_readb(&td->tmd1_bits);
752 /* If we hit a packet not owned by us, stop */
753 if (bits & LE_T1_OWN)
756 if (bits & LE_T1_ERR) {
757 u16 status = sbus_readw(&td->misc);
759 dev->stats.tx_errors++;
760 if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++;
761 if (status & LE_T3_LCOL) dev->stats.tx_window_errors++;
763 if (status & LE_T3_CLOS) {
764 dev->stats.tx_carrier_errors++;
765 if (lp->auto_select) {
766 lp->tpe = 1 - lp->tpe;
767 printk(KERN_NOTICE "%s: Carrier Lost, trying %s\n",
768 dev->name, lp->tpe?"TPE":"AUI");
772 init_restart_lance(lp);
777 /* Buffer errors and underflows turn off the
778 * transmitter, restart the adapter.
780 if (status & (LE_T3_BUF|LE_T3_UFL)) {
781 dev->stats.tx_fifo_errors++;
783 printk(KERN_ERR "%s: Tx: ERR_BUF|ERR_UFL, restarting\n",
788 init_restart_lance(lp);
791 } else if ((bits & LE_T1_POK) == LE_T1_POK) {
793 * So we don't count the packet more than once.
795 sbus_writeb(bits & ~(LE_T1_POK), &td->tmd1_bits);
797 /* One collision before packet was sent. */
798 if (bits & LE_T1_EONE)
799 dev->stats.collisions++;
801 /* More than one collision, be optimistic. */
802 if (bits & LE_T1_EMORE)
803 dev->stats.collisions += 2;
805 dev->stats.tx_packets++;
812 if (netif_queue_stopped(dev) &&
814 netif_wake_queue(dev);
816 spin_unlock(&lp->lock);
819 static irqreturn_t lance_interrupt(int irq, void *dev_id)
821 struct net_device *dev = dev_id;
822 struct lance_private *lp = netdev_priv(dev);
825 sbus_writew(LE_CSR0, lp->lregs + RAP);
826 csr0 = sbus_readw(lp->lregs + RDP);
828 /* Acknowledge all the interrupt sources ASAP */
829 sbus_writew(csr0 & (LE_C0_INTR | LE_C0_TINT | LE_C0_RINT),
832 if ((csr0 & LE_C0_ERR) != 0) {
833 /* Clear the error condition */
834 sbus_writew((LE_C0_BABL | LE_C0_ERR | LE_C0_MISS |
835 LE_C0_CERR | LE_C0_MERR),
839 if (csr0 & LE_C0_RINT)
842 if (csr0 & LE_C0_TINT)
845 if (csr0 & LE_C0_BABL)
846 dev->stats.tx_errors++;
848 if (csr0 & LE_C0_MISS)
849 dev->stats.rx_errors++;
851 if (csr0 & LE_C0_MERR) {
853 u32 addr = sbus_readl(lp->dregs + DMA_ADDR);
855 printk(KERN_ERR "%s: Memory error, status %04x, addr %06x\n",
856 dev->name, csr0, addr & 0xffffff);
858 printk(KERN_ERR "%s: Memory error, status %04x\n",
862 sbus_writew(LE_C0_STOP, lp->lregs + RDP);
865 u32 dma_csr = sbus_readl(lp->dregs + DMA_CSR);
867 dma_csr |= DMA_FIFO_INV;
868 sbus_writel(dma_csr, lp->dregs + DMA_CSR);
873 init_restart_lance(lp);
874 netif_wake_queue(dev);
877 sbus_writew(LE_C0_INEA, lp->lregs + RDP);
882 /* Build a fake network packet and send it to ourselves. */
883 static void build_fake_packet(struct lance_private *lp)
885 struct net_device *dev = lp->dev;
888 entry = lp->tx_new & TX_RING_MOD_MASK;
889 if (lp->pio_buffer) {
890 struct lance_init_block __iomem *ib = lp->init_block_iomem;
891 u16 __iomem *packet = (u16 __iomem *) &(ib->tx_buf[entry][0]);
892 struct ethhdr __iomem *eth = (struct ethhdr __iomem *) packet;
893 for (i = 0; i < (ETH_ZLEN / sizeof(u16)); i++)
894 sbus_writew(0, &packet[i]);
895 for (i = 0; i < 6; i++) {
896 sbus_writeb(dev->dev_addr[i], ð->h_dest[i]);
897 sbus_writeb(dev->dev_addr[i], ð->h_source[i]);
899 sbus_writew((-ETH_ZLEN) | 0xf000, &ib->btx_ring[entry].length);
900 sbus_writew(0, &ib->btx_ring[entry].misc);
901 sbus_writeb(LE_T1_POK|LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
903 struct lance_init_block *ib = lp->init_block_mem;
904 u16 *packet = (u16 *) &(ib->tx_buf[entry][0]);
905 struct ethhdr *eth = (struct ethhdr *) packet;
906 memset(packet, 0, ETH_ZLEN);
907 for (i = 0; i < 6; i++) {
908 eth->h_dest[i] = dev->dev_addr[i];
909 eth->h_source[i] = dev->dev_addr[i];
911 ib->btx_ring[entry].length = (-ETH_ZLEN) | 0xf000;
912 ib->btx_ring[entry].misc = 0;
913 ib->btx_ring[entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN);
915 lp->tx_new = TX_NEXT(entry);
918 static int lance_open(struct net_device *dev)
920 struct lance_private *lp = netdev_priv(dev);
925 if (request_irq(dev->irq, lance_interrupt, IRQF_SHARED,
926 lancestr, (void *) dev)) {
927 printk(KERN_ERR "Lance: Can't get irq %d\n", dev->irq);
931 /* On the 4m, setup the ledma to provide the upper bits for buffers */
933 u32 regval = lp->init_block_dvma & 0xff000000;
935 sbus_writel(regval, lp->dregs + DMA_TEST);
938 /* Set mode and clear multicast filter only at device open,
939 * so that lance_init_ring() called at any error will not
940 * forget multicast filters.
942 * BTW it is common bug in all lance drivers! --ANK
944 if (lp->pio_buffer) {
945 struct lance_init_block __iomem *ib = lp->init_block_iomem;
946 sbus_writew(0, &ib->mode);
947 sbus_writel(0, &ib->filter[0]);
948 sbus_writel(0, &ib->filter[1]);
950 struct lance_init_block *ib = lp->init_block_mem;
959 netif_start_queue(dev);
961 status = init_restart_lance(lp);
962 if (!status && lp->auto_select) {
963 build_fake_packet(lp);
964 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
970 static int lance_close(struct net_device *dev)
972 struct lance_private *lp = netdev_priv(dev);
974 netif_stop_queue(dev);
975 del_timer_sync(&lp->multicast_timer);
979 free_irq(dev->irq, (void *) dev);
983 static int lance_reset(struct net_device *dev)
985 struct lance_private *lp = netdev_priv(dev);
990 /* On the 4m, reset the dma too */
994 printk(KERN_ERR "resetting ledma\n");
995 csr = sbus_readl(lp->dregs + DMA_CSR);
996 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
998 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1000 addr = lp->init_block_dvma & 0xff000000;
1001 sbus_writel(addr, lp->dregs + DMA_TEST);
1005 dev->trans_start = jiffies; /* prevent tx timeout */
1006 status = init_restart_lance(lp);
1010 static void lance_piocopy_from_skb(void __iomem *dest, unsigned char *src, int len)
1012 void __iomem *piobuf = dest;
1017 switch ((unsigned long)src & 0x3) {
1021 sbus_writel(*p32, piobuf);
1038 sbus_writel(val, piobuf);
1048 u32 val = p16[0]<<16 | p16[1];
1049 sbus_writel(val, piobuf);
1058 u16 val = src[0] << 8 | src[1];
1059 sbus_writew(val, piobuf);
1065 sbus_writeb(src[0], piobuf);
1068 static void lance_piozero(void __iomem *dest, int len)
1070 void __iomem *piobuf = dest;
1072 if ((unsigned long)piobuf & 1) {
1073 sbus_writeb(0, piobuf);
1080 sbus_writeb(0, piobuf);
1083 if ((unsigned long)piobuf & 2) {
1084 sbus_writew(0, piobuf);
1091 sbus_writel(0, piobuf);
1096 sbus_writew(0, piobuf);
1101 sbus_writeb(0, piobuf);
1104 static void lance_tx_timeout(struct net_device *dev)
1106 struct lance_private *lp = netdev_priv(dev);
1108 printk(KERN_ERR "%s: transmit timed out, status %04x, reset\n",
1109 dev->name, sbus_readw(lp->lregs + RDP));
1111 netif_wake_queue(dev);
1114 static int lance_start_xmit(struct sk_buff *skb, struct net_device *dev)
1116 struct lance_private *lp = netdev_priv(dev);
1117 int entry, skblen, len;
1121 len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen;
1123 spin_lock_irq(&lp->lock);
1125 dev->stats.tx_bytes += len;
1127 entry = lp->tx_new & TX_RING_MOD_MASK;
1128 if (lp->pio_buffer) {
1129 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1130 sbus_writew((-len) | 0xf000, &ib->btx_ring[entry].length);
1131 sbus_writew(0, &ib->btx_ring[entry].misc);
1132 lance_piocopy_from_skb(&ib->tx_buf[entry][0], skb->data, skblen);
1134 lance_piozero(&ib->tx_buf[entry][skblen], len - skblen);
1135 sbus_writeb(LE_T1_POK | LE_T1_OWN, &ib->btx_ring[entry].tmd1_bits);
1137 struct lance_init_block *ib = lp->init_block_mem;
1138 ib->btx_ring [entry].length = (-len) | 0xf000;
1139 ib->btx_ring [entry].misc = 0;
1140 skb_copy_from_linear_data(skb, &ib->tx_buf [entry][0], skblen);
1142 memset((char *) &ib->tx_buf [entry][skblen], 0, len - skblen);
1143 ib->btx_ring [entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
1146 lp->tx_new = TX_NEXT(entry);
1148 if (TX_BUFFS_AVAIL <= 0)
1149 netif_stop_queue(dev);
1151 /* Kick the lance: transmit now */
1152 sbus_writew(LE_C0_INEA | LE_C0_TDMD, lp->lregs + RDP);
1154 /* Read back CSR to invalidate the E-Cache.
1155 * This is needed, because DMA_DSBL_WR_INV is set.
1158 sbus_readw(lp->lregs + RDP);
1160 spin_unlock_irq(&lp->lock);
1164 return NETDEV_TX_OK;
1167 /* taken from the depca driver */
1168 static void lance_load_multicast(struct net_device *dev)
1170 struct lance_private *lp = netdev_priv(dev);
1171 struct netdev_hw_addr *ha;
1175 /* set all multicast bits */
1176 if (dev->flags & IFF_ALLMULTI)
1181 if (lp->pio_buffer) {
1182 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1183 sbus_writel(val, &ib->filter[0]);
1184 sbus_writel(val, &ib->filter[1]);
1186 struct lance_init_block *ib = lp->init_block_mem;
1187 ib->filter [0] = val;
1188 ib->filter [1] = val;
1191 if (dev->flags & IFF_ALLMULTI)
1195 netdev_for_each_mc_addr(ha, dev) {
1196 crc = ether_crc_le(6, ha->addr);
1198 if (lp->pio_buffer) {
1199 struct lance_init_block __iomem *ib = lp->init_block_iomem;
1200 u16 __iomem *mcast_table = (u16 __iomem *) &ib->filter;
1201 u16 tmp = sbus_readw(&mcast_table[crc>>4]);
1202 tmp |= 1 << (crc & 0xf);
1203 sbus_writew(tmp, &mcast_table[crc>>4]);
1205 struct lance_init_block *ib = lp->init_block_mem;
1206 u16 *mcast_table = (u16 *) &ib->filter;
1207 mcast_table [crc >> 4] |= 1 << (crc & 0xf);
1212 static void lance_set_multicast(struct net_device *dev)
1214 struct lance_private *lp = netdev_priv(dev);
1215 struct lance_init_block *ib_mem = lp->init_block_mem;
1216 struct lance_init_block __iomem *ib_iomem = lp->init_block_iomem;
1219 if (!netif_running(dev))
1222 if (lp->tx_old != lp->tx_new) {
1223 mod_timer(&lp->multicast_timer, jiffies + 4);
1224 netif_wake_queue(dev);
1228 netif_stop_queue(dev);
1234 mode = sbus_readw(&ib_iomem->mode);
1236 mode = ib_mem->mode;
1237 if (dev->flags & IFF_PROMISC) {
1240 sbus_writew(mode, &ib_iomem->mode);
1242 ib_mem->mode = mode;
1244 mode &= ~LE_MO_PROM;
1246 sbus_writew(mode, &ib_iomem->mode);
1248 ib_mem->mode = mode;
1249 lance_load_multicast(dev);
1252 init_restart_lance(lp);
1253 netif_wake_queue(dev);
1256 static void lance_set_multicast_retry(unsigned long _opaque)
1258 struct net_device *dev = (struct net_device *) _opaque;
1260 lance_set_multicast(dev);
1263 static void lance_free_hwresources(struct lance_private *lp)
1266 of_iounmap(&lp->op->resource[0], lp->lregs, LANCE_REG_SIZE);
1268 struct platform_device *ledma = lp->ledma;
1270 of_iounmap(&ledma->resource[0], lp->dregs,
1271 resource_size(&ledma->resource[0]));
1273 if (lp->init_block_iomem) {
1274 of_iounmap(&lp->lebuffer->resource[0], lp->init_block_iomem,
1275 sizeof(struct lance_init_block));
1276 } else if (lp->init_block_mem) {
1277 dma_free_coherent(&lp->op->dev,
1278 sizeof(struct lance_init_block),
1280 lp->init_block_dvma);
1284 /* Ethtool support... */
1285 static void sparc_lance_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
1287 strcpy(info->driver, "sunlance");
1288 strcpy(info->version, "2.02");
1291 static const struct ethtool_ops sparc_lance_ethtool_ops = {
1292 .get_drvinfo = sparc_lance_get_drvinfo,
1293 .get_link = ethtool_op_get_link,
1296 static const struct net_device_ops sparc_lance_ops = {
1297 .ndo_open = lance_open,
1298 .ndo_stop = lance_close,
1299 .ndo_start_xmit = lance_start_xmit,
1300 .ndo_set_rx_mode = lance_set_multicast,
1301 .ndo_tx_timeout = lance_tx_timeout,
1302 .ndo_change_mtu = eth_change_mtu,
1303 .ndo_set_mac_address = eth_mac_addr,
1304 .ndo_validate_addr = eth_validate_addr,
1307 static int sparc_lance_probe_one(struct platform_device *op,
1308 struct platform_device *ledma,
1309 struct platform_device *lebuffer)
1311 struct device_node *dp = op->dev.of_node;
1312 static unsigned version_printed;
1313 struct lance_private *lp;
1314 struct net_device *dev;
1317 dev = alloc_etherdev(sizeof(struct lance_private) + 8);
1321 lp = netdev_priv(dev);
1323 if (sparc_lance_debug && version_printed++ == 0)
1324 printk (KERN_INFO "%s", version);
1326 spin_lock_init(&lp->lock);
1328 /* Copy the IDPROM ethernet address to the device structure, later we
1329 * will copy the address in the device structure to the lance
1330 * initialization block.
1332 for (i = 0; i < 6; i++)
1333 dev->dev_addr[i] = idprom->id_ethaddr[i];
1335 /* Get the IO region */
1336 lp->lregs = of_ioremap(&op->resource[0], 0,
1337 LANCE_REG_SIZE, lancestr);
1339 printk(KERN_ERR "SunLance: Cannot map registers.\n");
1345 lp->dregs = of_ioremap(&ledma->resource[0], 0,
1346 resource_size(&ledma->resource[0]),
1349 printk(KERN_ERR "SunLance: Cannot map "
1350 "ledma registers.\n");
1356 lp->lebuffer = lebuffer;
1359 if (lebuffer->resource[0].start & 7) {
1360 printk(KERN_ERR "SunLance: ERROR: Rx and Tx rings not on even boundary.\n");
1363 lp->init_block_iomem =
1364 of_ioremap(&lebuffer->resource[0], 0,
1365 sizeof(struct lance_init_block), "lebuffer");
1366 if (!lp->init_block_iomem) {
1367 printk(KERN_ERR "SunLance: Cannot map PIO buffer.\n");
1370 lp->init_block_dvma = 0;
1372 lp->init_ring = lance_init_ring_pio;
1373 lp->rx = lance_rx_pio;
1374 lp->tx = lance_tx_pio;
1376 lp->init_block_mem =
1377 dma_alloc_coherent(&op->dev,
1378 sizeof(struct lance_init_block),
1379 &lp->init_block_dvma, GFP_ATOMIC);
1380 if (!lp->init_block_mem) {
1381 printk(KERN_ERR "SunLance: Cannot allocate consistent DMA memory.\n");
1385 lp->init_ring = lance_init_ring_dvma;
1386 lp->rx = lance_rx_dvma;
1387 lp->tx = lance_tx_dvma;
1389 lp->busmaster_regval = of_getintprop_default(dp, "busmaster-regval",
1394 lp->name = lancestr;
1396 lp->burst_sizes = 0;
1398 struct device_node *ledma_dp = ledma->dev.of_node;
1399 struct device_node *sbus_dp;
1400 unsigned int sbmask;
1404 /* Find burst-size property for ledma */
1405 lp->burst_sizes = of_getintprop_default(ledma_dp,
1408 /* ledma may be capable of fast bursts, but sbus may not. */
1409 sbus_dp = ledma_dp->parent;
1410 sbmask = of_getintprop_default(sbus_dp, "burst-sizes",
1412 lp->burst_sizes &= sbmask;
1414 /* Get the cable-selection property */
1415 prop = of_get_property(ledma_dp, "cable-selection", NULL);
1416 if (!prop || prop[0] == '\0') {
1417 struct device_node *nd;
1419 printk(KERN_INFO "SunLance: using "
1420 "auto-carrier-detection.\n");
1422 nd = of_find_node_by_path("/options");
1426 prop = of_get_property(nd, "tpe-link-test?", NULL);
1430 if (strcmp(prop, "true")) {
1431 printk(KERN_NOTICE "SunLance: warning: overriding option "
1432 "'tpe-link-test?'\n");
1433 printk(KERN_NOTICE "SunLance: warning: mail any problems "
1434 "to ecd@skynet.be\n");
1435 auxio_set_lte(AUXIO_LTE_ON);
1438 lp->auto_select = 1;
1440 } else if (!strcmp(prop, "aui")) {
1441 lp->auto_select = 0;
1444 lp->auto_select = 0;
1449 csr = sbus_readl(lp->dregs + DMA_CSR);
1450 sbus_writel(csr | DMA_RST_ENET, lp->dregs + DMA_CSR);
1452 sbus_writel(csr & ~DMA_RST_ENET, lp->dregs + DMA_CSR);
1457 SET_NETDEV_DEV(dev, &op->dev);
1458 dev->watchdog_timeo = 5*HZ;
1459 dev->ethtool_ops = &sparc_lance_ethtool_ops;
1460 dev->netdev_ops = &sparc_lance_ops;
1462 dev->irq = op->archdata.irqs[0];
1464 /* We cannot sleep if the chip is busy during a
1465 * multicast list update event, because such events
1466 * can occur from interrupts (ex. IPv6). So we
1467 * use a timer to try again later when necessary. -DaveM
1469 init_timer(&lp->multicast_timer);
1470 lp->multicast_timer.data = (unsigned long) dev;
1471 lp->multicast_timer.function = lance_set_multicast_retry;
1473 if (register_netdev(dev)) {
1474 printk(KERN_ERR "SunLance: Cannot register device.\n");
1478 dev_set_drvdata(&op->dev, lp);
1480 printk(KERN_INFO "%s: LANCE %pM\n",
1481 dev->name, dev->dev_addr);
1486 lance_free_hwresources(lp);
1491 static int sunlance_sbus_probe(struct platform_device *op)
1493 struct platform_device *parent = to_platform_device(op->dev.parent);
1494 struct device_node *parent_dp = parent->dev.of_node;
1497 if (!strcmp(parent_dp->name, "ledma")) {
1498 err = sparc_lance_probe_one(op, parent, NULL);
1499 } else if (!strcmp(parent_dp->name, "lebuffer")) {
1500 err = sparc_lance_probe_one(op, NULL, parent);
1502 err = sparc_lance_probe_one(op, NULL, NULL);
1507 static int sunlance_sbus_remove(struct platform_device *op)
1509 struct lance_private *lp = dev_get_drvdata(&op->dev);
1510 struct net_device *net_dev = lp->dev;
1512 unregister_netdev(net_dev);
1514 lance_free_hwresources(lp);
1516 free_netdev(net_dev);
1518 dev_set_drvdata(&op->dev, NULL);
1523 static const struct of_device_id sunlance_sbus_match[] = {
1530 MODULE_DEVICE_TABLE(of, sunlance_sbus_match);
1532 static struct platform_driver sunlance_sbus_driver = {
1535 .owner = THIS_MODULE,
1536 .of_match_table = sunlance_sbus_match,
1538 .probe = sunlance_sbus_probe,
1539 .remove = sunlance_sbus_remove,
1542 module_platform_driver(sunlance_sbus_driver);