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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* sun3lance.c: Ethernet driver for SUN3 Lance chip */
2/*
3
Jeff Garzik6aa20a22006-09-13 13:24:59 -04004 Sun3 Lance ethernet driver, by Sam Creasey (sammy@users.qual.net).
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 This driver is a part of the linux kernel, and is thus distributed
6 under the GNU General Public License.
Jeff Garzik6aa20a22006-09-13 13:24:59 -04007
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 The values used in LANCE_OBIO and LANCE_IRQ seem to be empirically
9 true for the correct IRQ and address of the lance registers. They
10 have not been widely tested, however. What we probably need is a
11 "proper" way to search for a device in the sun3's prom, but, alas,
Jeff Garzik6aa20a22006-09-13 13:24:59 -040012 linux has no such thing.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14 This driver is largely based on atarilance.c, by Roman Hodek. Other
15 sources of inspiration were the NetBSD sun3 am7990 driver, and the
Jeff Garzik6aa20a22006-09-13 13:24:59 -040016 linux sparc lance driver (sunlance.c).
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18 There are more assumptions made throughout this driver, it almost
19 certainly still needs work, but it does work at least for RARP/BOOTP and
20 mounting the root NFS filesystem.
Jeff Garzik6aa20a22006-09-13 13:24:59 -040021
Linus Torvalds1da177e2005-04-16 15:20:36 -070022*/
23
24static char *version = "sun3lance.c: v1.2 1/12/2001 Sam Creasey (sammy@sammy.net)\n";
25
26#include <linux/module.h>
27#include <linux/stddef.h>
28#include <linux/kernel.h>
29#include <linux/string.h>
30#include <linux/errno.h>
31#include <linux/slab.h>
32#include <linux/interrupt.h>
33#include <linux/init.h>
34#include <linux/ioport.h>
35#include <linux/delay.h>
36#include <linux/netdevice.h>
37#include <linux/etherdevice.h>
38#include <linux/skbuff.h>
39#include <linux/bitops.h>
40
Al Viroa1f8e7f72006-10-19 16:08:53 -040041#include <asm/cacheflush.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <asm/setup.h>
43#include <asm/irq.h>
44#include <asm/io.h>
45#include <asm/pgtable.h>
46#include <asm/dvma.h>
47#include <asm/idprom.h>
48#include <asm/machines.h>
49
50#ifdef CONFIG_SUN3
51#include <asm/sun3mmu.h>
52#else
53#include <asm/sun3xprom.h>
54#endif
55
56/* sun3/60 addr/irq for the lance chip. If your sun is different,
57 change this. */
58#define LANCE_OBIO 0x120000
Roman Zippel4facfde2006-06-25 05:46:59 -070059#define LANCE_IRQ IRQ_AUTO_3
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61/* Debug level:
62 * 0 = silent, print only serious errors
63 * 1 = normal, print error messages
64 * 2 = debug, print debug infos
65 * 3 = debug, print even more debug infos (packet data)
66 */
67
68#define LANCE_DEBUG 0
69
70#ifdef LANCE_DEBUG
71static int lance_debug = LANCE_DEBUG;
72#else
73static int lance_debug = 1;
74#endif
Rusty Russell8d3b33f2006-03-25 03:07:05 -080075module_param(lance_debug, int, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -070076MODULE_PARM_DESC(lance_debug, "SUN3 Lance debug level (0-3)");
77MODULE_LICENSE("GPL");
78
79#define DPRINTK(n,a) \
80 do { \
81 if (lance_debug >= n) \
82 printk a; \
83 } while( 0 )
84
85
86/* we're only using 32k of memory, so we use 4 TX
87 buffers and 16 RX buffers. These values are expressed as log2. */
88
89#define TX_LOG_RING_SIZE 3
90#define RX_LOG_RING_SIZE 5
91
92/* These are the derived values */
93
94#define TX_RING_SIZE (1 << TX_LOG_RING_SIZE)
95#define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5)
96#define TX_RING_MOD_MASK (TX_RING_SIZE - 1)
97
98#define RX_RING_SIZE (1 << RX_LOG_RING_SIZE)
99#define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5)
100#define RX_RING_MOD_MASK (RX_RING_SIZE - 1)
101
102/* Definitions for packet buffer access: */
103#define PKT_BUF_SZ 1544
104
105/* Get the address of a packet buffer corresponding to a given buffer head */
106#define PKTBUF_ADDR(head) (void *)((unsigned long)(MEM) | (head)->base)
107
108
109/* The LANCE Rx and Tx ring descriptors. */
110struct lance_rx_head {
111 unsigned short base; /* Low word of base addr */
112 volatile unsigned char flag;
113 unsigned char base_hi; /* High word of base addr (unused) */
114 short buf_length; /* This length is 2s complement! */
115 volatile short msg_length; /* This length is "normal". */
116};
117
118struct lance_tx_head {
119 unsigned short base; /* Low word of base addr */
120 volatile unsigned char flag;
121 unsigned char base_hi; /* High word of base addr (unused) */
122 short length; /* Length is 2s complement! */
123 volatile short misc;
124};
125
126/* The LANCE initialization block, described in databook. */
127struct lance_init_block {
128 unsigned short mode; /* Pre-set mode */
129 unsigned char hwaddr[6]; /* Physical ethernet address */
130 unsigned int filter[2]; /* Multicast filter (unused). */
131 /* Receive and transmit ring base, along with length bits. */
132 unsigned short rdra;
133 unsigned short rlen;
134 unsigned short tdra;
135 unsigned short tlen;
136 unsigned short pad[4]; /* is thie needed? */
137};
138
139/* The whole layout of the Lance shared memory */
140struct lance_memory {
141 struct lance_init_block init;
142 struct lance_tx_head tx_head[TX_RING_SIZE];
143 struct lance_rx_head rx_head[RX_RING_SIZE];
144 char rx_data[RX_RING_SIZE][PKT_BUF_SZ];
145 char tx_data[TX_RING_SIZE][PKT_BUF_SZ];
146};
147
148/* The driver's private device structure */
149
150struct lance_private {
151 volatile unsigned short *iobase;
152 struct lance_memory *mem;
153 int new_rx, new_tx; /* The next free ring entry */
154 int old_tx, old_rx; /* ring entry to be processed */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155/* These two must be longs for set_bit() */
156 long tx_full;
157 long lock;
158};
159
160/* I/O register access macros */
161
162#define MEM lp->mem
163#define DREG lp->iobase[0]
164#define AREG lp->iobase[1]
Al Viroe345d5e2005-08-25 06:24:21 +0100165#define REGA(a) (*( AREG = (a), &DREG ))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167/* Definitions for the Lance */
168
169/* tx_head flags */
170#define TMD1_ENP 0x01 /* end of packet */
171#define TMD1_STP 0x02 /* start of packet */
172#define TMD1_DEF 0x04 /* deferred */
173#define TMD1_ONE 0x08 /* one retry needed */
174#define TMD1_MORE 0x10 /* more than one retry needed */
175#define TMD1_ERR 0x40 /* error summary */
176#define TMD1_OWN 0x80 /* ownership (set: chip owns) */
177
178#define TMD1_OWN_CHIP TMD1_OWN
179#define TMD1_OWN_HOST 0
180
181/* tx_head misc field */
182#define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */
183#define TMD3_RTRY 0x0400 /* failed after 16 retries */
184#define TMD3_LCAR 0x0800 /* carrier lost */
185#define TMD3_LCOL 0x1000 /* late collision */
186#define TMD3_UFLO 0x4000 /* underflow (late memory) */
187#define TMD3_BUFF 0x8000 /* buffering error (no ENP) */
188
189/* rx_head flags */
190#define RMD1_ENP 0x01 /* end of packet */
191#define RMD1_STP 0x02 /* start of packet */
192#define RMD1_BUFF 0x04 /* buffer error */
193#define RMD1_CRC 0x08 /* CRC error */
194#define RMD1_OFLO 0x10 /* overflow */
195#define RMD1_FRAM 0x20 /* framing error */
196#define RMD1_ERR 0x40 /* error summary */
197#define RMD1_OWN 0x80 /* ownership (set: ship owns) */
198
199#define RMD1_OWN_CHIP RMD1_OWN
200#define RMD1_OWN_HOST 0
201
202/* register names */
203#define CSR0 0 /* mode/status */
204#define CSR1 1 /* init block addr (low) */
205#define CSR2 2 /* init block addr (high) */
206#define CSR3 3 /* misc */
207#define CSR8 8 /* address filter */
208#define CSR15 15 /* promiscuous mode */
209
210/* CSR0 */
211/* (R=readable, W=writeable, S=set on write, C=clear on write) */
212#define CSR0_INIT 0x0001 /* initialize (RS) */
213#define CSR0_STRT 0x0002 /* start (RS) */
214#define CSR0_STOP 0x0004 /* stop (RS) */
215#define CSR0_TDMD 0x0008 /* transmit demand (RS) */
216#define CSR0_TXON 0x0010 /* transmitter on (R) */
217#define CSR0_RXON 0x0020 /* receiver on (R) */
218#define CSR0_INEA 0x0040 /* interrupt enable (RW) */
219#define CSR0_INTR 0x0080 /* interrupt active (R) */
220#define CSR0_IDON 0x0100 /* initialization done (RC) */
221#define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */
222#define CSR0_RINT 0x0400 /* receiver interrupt (RC) */
223#define CSR0_MERR 0x0800 /* memory error (RC) */
224#define CSR0_MISS 0x1000 /* missed frame (RC) */
225#define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */
226#define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */
227#define CSR0_ERR 0x8000 /* error (RC) */
228
229/* CSR3 */
230#define CSR3_BCON 0x0001 /* byte control */
231#define CSR3_ACON 0x0002 /* ALE control */
232#define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */
233
234/***************************** Prototypes *****************************/
235
236static int lance_probe( struct net_device *dev);
237static int lance_open( struct net_device *dev );
238static void lance_init_ring( struct net_device *dev );
239static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
David Howells7d12e782006-10-05 14:55:46 +0100240static irqreturn_t lance_interrupt( int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241static int lance_rx( struct net_device *dev );
242static int lance_close( struct net_device *dev );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243static void set_multicast_list( struct net_device *dev );
244
245/************************* End of Prototypes **************************/
246
247struct net_device * __init sun3lance_probe(int unit)
248{
249 struct net_device *dev;
250 static int found;
251 int err = -ENODEV;
252
Geert Uytterhoeven0f734482008-05-18 20:47:16 +0200253 if (!MACH_IS_SUN3 && !MACH_IS_SUN3X)
254 return ERR_PTR(-ENODEV);
255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 /* check that this machine has an onboard lance */
257 switch(idprom->id_machtype) {
258 case SM_SUN3|SM_3_50:
259 case SM_SUN3|SM_3_60:
260 case SM_SUN3X|SM_3_80:
261 /* these machines have lance */
262 break;
263
264 default:
265 return ERR_PTR(-ENODEV);
266 }
267
268 if (found)
269 return ERR_PTR(-ENODEV);
270
271 dev = alloc_etherdev(sizeof(struct lance_private));
272 if (!dev)
273 return ERR_PTR(-ENOMEM);
274 if (unit >= 0) {
275 sprintf(dev->name, "eth%d", unit);
276 netdev_boot_setup_check(dev);
277 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
279 if (!lance_probe(dev))
280 goto out;
281
282 err = register_netdev(dev);
283 if (err)
284 goto out1;
285 found = 1;
286 return dev;
287
288out1:
289#ifdef CONFIG_SUN3
Al Viro437111c2006-10-11 17:28:17 +0100290 iounmap((void __iomem *)dev->base_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291#endif
292out:
293 free_netdev(dev);
294 return ERR_PTR(err);
295}
296
297static int __init lance_probe( struct net_device *dev)
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400298{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 unsigned long ioaddr;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 struct lance_private *lp;
302 int i;
303 static int did_version;
304 volatile unsigned short *ioaddr_probe;
305 unsigned short tmp1, tmp2;
306
307#ifdef CONFIG_SUN3
308 ioaddr = (unsigned long)ioremap(LANCE_OBIO, PAGE_SIZE);
309 if (!ioaddr)
310 return 0;
311#else
312 ioaddr = SUN3X_LANCE;
313#endif
314
315 /* test to see if there's really a lance here */
316 /* (CSRO_INIT shouldn't be readable) */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400317
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 ioaddr_probe = (volatile unsigned short *)ioaddr;
319 tmp1 = ioaddr_probe[0];
320 tmp2 = ioaddr_probe[1];
321
322 ioaddr_probe[1] = CSR0;
323 ioaddr_probe[0] = CSR0_INIT | CSR0_STOP;
324
325 if(ioaddr_probe[0] != CSR0_STOP) {
326 ioaddr_probe[0] = tmp1;
327 ioaddr_probe[1] = tmp2;
328
329#ifdef CONFIG_SUN3
Al Viro437111c2006-10-11 17:28:17 +0100330 iounmap((void __iomem *)ioaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331#endif
332 return 0;
333 }
334
335 lp = netdev_priv(dev);
336
337 /* XXX - leak? */
338 MEM = dvma_malloc_align(sizeof(struct lance_memory), 0x10000);
Cyrill V. Gorcunovc14bac62007-03-26 21:47:26 -0800339 if (MEM == NULL) {
340#ifdef CONFIG_SUN3
341 iounmap((void __iomem *)ioaddr);
342#endif
343 printk(KERN_WARNING "SUN3 Lance couldn't allocate DVMA memory\n");
344 return 0;
345 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 lp->iobase = (volatile unsigned short *)ioaddr;
348 dev->base_addr = (unsigned long)ioaddr; /* informational only */
349
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400350 REGA(CSR0) = CSR0_STOP;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Cyrill V. Gorcunovc14bac62007-03-26 21:47:26 -0800352 if (request_irq(LANCE_IRQ, lance_interrupt, IRQF_DISABLED, "SUN3 Lance", dev) < 0) {
353#ifdef CONFIG_SUN3
354 iounmap((void __iomem *)ioaddr);
355#endif
356 dvma_free((void *)MEM);
357 printk(KERN_WARNING "SUN3 Lance unable to allocate IRQ\n");
358 return 0;
359 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 dev->irq = (unsigned short)LANCE_IRQ;
361
362
363 printk("%s: SUN3 Lance at io %#lx, mem %#lx, irq %d, hwaddr ",
364 dev->name,
365 (unsigned long)ioaddr,
366 (unsigned long)MEM,
367 dev->irq);
368
369 /* copy in the ethernet address from the prom */
370 for(i = 0; i < 6 ; i++)
371 dev->dev_addr[i] = idprom->id_ethaddr[i];
372
373 /* tell the card it's ether address, bytes swapped */
374 MEM->init.hwaddr[0] = dev->dev_addr[1];
375 MEM->init.hwaddr[1] = dev->dev_addr[0];
376 MEM->init.hwaddr[2] = dev->dev_addr[3];
377 MEM->init.hwaddr[3] = dev->dev_addr[2];
378 MEM->init.hwaddr[4] = dev->dev_addr[5];
379 MEM->init.hwaddr[5] = dev->dev_addr[4];
380
Johannes Berge1749612008-10-27 15:59:26 -0700381 printk("%pM\n", dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
383 MEM->init.mode = 0x0000;
384 MEM->init.filter[0] = 0x00000000;
385 MEM->init.filter[1] = 0x00000000;
386 MEM->init.rdra = dvma_vtob(MEM->rx_head);
387 MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
388 (dvma_vtob(MEM->rx_head) >> 16);
389 MEM->init.tdra = dvma_vtob(MEM->tx_head);
390 MEM->init.tlen = (TX_LOG_RING_SIZE << 13) |
391 (dvma_vtob(MEM->tx_head) >> 16);
392
393 DPRINTK(2, ("initaddr: %08lx rx_ring: %08lx tx_ring: %08lx\n",
394 dvma_vtob(&(MEM->init)), dvma_vtob(MEM->rx_head),
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400395 (dvma_vtob(MEM->tx_head))));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396
397 if (did_version++ == 0)
398 printk( version );
399
400 /* The LANCE-specific entries in the device structure. */
401 dev->open = &lance_open;
402 dev->hard_start_xmit = &lance_start_xmit;
403 dev->stop = &lance_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 dev->set_multicast_list = &set_multicast_list;
Al Viroa5d361f2006-01-12 01:06:34 -0800405 dev->set_mac_address = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406// KLUDGE -- REMOVE ME
407 set_bit(__LINK_STATE_PRESENT, &dev->state);
408
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 return 1;
411}
412
413static int lance_open( struct net_device *dev )
414{
415 struct lance_private *lp = netdev_priv(dev);
416 int i;
417
418 DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));
419
420 REGA(CSR0) = CSR0_STOP;
421
422 lance_init_ring(dev);
423
424 /* From now on, AREG is kept to point to CSR0 */
425 REGA(CSR0) = CSR0_INIT;
426
427 i = 1000000;
428 while (--i > 0)
429 if (DREG & CSR0_IDON)
430 break;
Roel Kluincff71e82009-02-12 16:40:20 -0800431 if (i <= 0 || (DREG & CSR0_ERR)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
433 dev->name, i, DREG ));
434 DREG = CSR0_STOP;
435 return( -EIO );
436 }
437
438 DREG = CSR0_IDON | CSR0_STRT | CSR0_INEA;
439
440 netif_start_queue(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
443
444 return( 0 );
445}
446
447
448/* Initialize the LANCE Rx and Tx rings. */
449
450static void lance_init_ring( struct net_device *dev )
451{
452 struct lance_private *lp = netdev_priv(dev);
453 int i;
454
455 lp->lock = 0;
456 lp->tx_full = 0;
457 lp->new_rx = lp->new_tx = 0;
458 lp->old_rx = lp->old_tx = 0;
459
460 for( i = 0; i < TX_RING_SIZE; i++ ) {
461 MEM->tx_head[i].base = dvma_vtob(MEM->tx_data[i]);
462 MEM->tx_head[i].flag = 0;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400463 MEM->tx_head[i].base_hi =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 (dvma_vtob(MEM->tx_data[i])) >>16;
465 MEM->tx_head[i].length = 0;
466 MEM->tx_head[i].misc = 0;
467 }
468
469 for( i = 0; i < RX_RING_SIZE; i++ ) {
470 MEM->rx_head[i].base = dvma_vtob(MEM->rx_data[i]);
471 MEM->rx_head[i].flag = RMD1_OWN_CHIP;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400472 MEM->rx_head[i].base_hi =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 (dvma_vtob(MEM->rx_data[i])) >> 16;
474 MEM->rx_head[i].buf_length = -PKT_BUF_SZ | 0xf000;
475 MEM->rx_head[i].msg_length = 0;
476 }
477
478 /* tell the card it's ether address, bytes swapped */
479 MEM->init.hwaddr[0] = dev->dev_addr[1];
480 MEM->init.hwaddr[1] = dev->dev_addr[0];
481 MEM->init.hwaddr[2] = dev->dev_addr[3];
482 MEM->init.hwaddr[3] = dev->dev_addr[2];
483 MEM->init.hwaddr[4] = dev->dev_addr[5];
484 MEM->init.hwaddr[5] = dev->dev_addr[4];
485
486 MEM->init.mode = 0x0000;
487 MEM->init.filter[0] = 0x00000000;
488 MEM->init.filter[1] = 0x00000000;
489 MEM->init.rdra = dvma_vtob(MEM->rx_head);
490 MEM->init.rlen = (RX_LOG_RING_SIZE << 13) |
491 (dvma_vtob(MEM->rx_head) >> 16);
492 MEM->init.tdra = dvma_vtob(MEM->tx_head);
493 MEM->init.tlen = (TX_LOG_RING_SIZE << 13) |
494 (dvma_vtob(MEM->tx_head) >> 16);
495
496
497 /* tell the lance the address of its init block */
498 REGA(CSR1) = dvma_vtob(&(MEM->init));
499 REGA(CSR2) = dvma_vtob(&(MEM->init)) >> 16;
500
501#ifdef CONFIG_SUN3X
502 REGA(CSR3) = CSR3_BSWP | CSR3_ACON | CSR3_BCON;
503#else
504 REGA(CSR3) = CSR3_BSWP;
505#endif
506
507}
508
509
510static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
511{
512 struct lance_private *lp = netdev_priv(dev);
513 int entry, len;
514 struct lance_tx_head *head;
515 unsigned long flags;
516
517 DPRINTK( 1, ( "%s: transmit start.\n",
518 dev->name));
519
520 /* Transmitter timeout, serious problems. */
521 if (netif_queue_stopped(dev)) {
522 int tickssofar = jiffies - dev->trans_start;
523 if (tickssofar < 20)
524 return( 1 );
525
526 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
527 dev->name, DREG ));
528 DREG = CSR0_STOP;
529 /*
530 * Always set BSWP after a STOP as STOP puts it back into
531 * little endian mode.
532 */
533 REGA(CSR3) = CSR3_BSWP;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700534 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536 if(lance_debug >= 2) {
537 int i;
538 printk("Ring data: old_tx %d new_tx %d%s new_rx %d\n",
539 lp->old_tx, lp->new_tx,
540 lp->tx_full ? " (full)" : "",
541 lp->new_rx );
542 for( i = 0 ; i < RX_RING_SIZE; i++ )
543 printk( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
544 i, MEM->rx_head[i].base,
545 -MEM->rx_head[i].buf_length,
546 MEM->rx_head[i].msg_length);
547 for( i = 0 ; i < TX_RING_SIZE; i++ )
548 printk("tx #%d: base=%04x len=%04x misc=%04x\n",
549 i, MEM->tx_head[i].base,
550 -MEM->tx_head[i].length,
551 MEM->tx_head[i].misc );
552 }
553
554 lance_init_ring(dev);
555 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 netif_start_queue(dev);
558 dev->trans_start = jiffies;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 return 0;
561 }
562
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400563
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 /* Block a timer-based transmit from overlapping. This could better be
565 done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
566
567 /* Block a timer-based transmit from overlapping with us by
568 stopping the queue for a bit... */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400569
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 netif_stop_queue(dev);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 if (test_and_set_bit( 0, (void*)&lp->lock ) != 0) {
573 printk( "%s: tx queue lock!.\n", dev->name);
574 /* don't clear dev->tbusy flag. */
575 return 1;
576 }
577
578 AREG = CSR0;
579 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
580 dev->name, DREG ));
581
582#ifdef CONFIG_SUN3X
583 /* this weirdness doesn't appear on sun3... */
584 if(!(DREG & CSR0_INIT)) {
585 DPRINTK( 1, ("INIT not set, reinitializing...\n"));
586 REGA( CSR0 ) = CSR0_STOP;
587 lance_init_ring(dev);
588 REGA( CSR0 ) = CSR0_INIT | CSR0_STRT;
589 }
590#endif
591
592 /* Fill in a Tx ring entry */
593#if 0
594 if (lance_debug >= 2) {
Joe Perches0795af52007-10-03 17:59:30 -0700595 printk( "%s: TX pkt %d type 0x%04x"
596 " from %s to %s"
597 " data at 0x%08x len %d\n",
598 dev->name, lp->new_tx, ((u_short *)skb->data)[6],
599 DEV_ADDR(&skb->data[6]), DEV_ADDR(skb->data),
600 (int)skb->data, (int)skb->len );
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400602#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 /* We're not prepared for the int until the last flags are set/reset.
604 * And the int may happen already after setting the OWN_CHIP... */
605 local_irq_save(flags);
606
607 /* Mask to ring buffer boundary. */
608 entry = lp->new_tx;
609 head = &(MEM->tx_head[entry]);
610
611 /* Caution: the write order is important here, set the "ownership" bits
612 * last.
613 */
614
615 /* the sun3's lance needs it's buffer padded to the minimum
616 size */
617 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
618
619// head->length = -len;
620 head->length = (-len) | 0xf000;
621 head->misc = 0;
622
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300623 skb_copy_from_linear_data(skb, PKTBUF_ADDR(head), skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 if (len != skb->len)
625 memset(PKTBUF_ADDR(head) + skb->len, 0, len-skb->len);
626
627 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
628 lp->new_tx = (lp->new_tx + 1) & TX_RING_MOD_MASK;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700629 dev->stats.tx_bytes += skb->len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630
631 /* Trigger an immediate send poll. */
632 REGA(CSR0) = CSR0_INEA | CSR0_TDMD | CSR0_STRT;
633 AREG = CSR0;
634 DPRINTK( 2, ( "%s: lance_start_xmit() exiting, csr0 %4.4x.\n",
635 dev->name, DREG ));
636 dev->trans_start = jiffies;
637 dev_kfree_skb( skb );
638
639 lp->lock = 0;
640 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400641 TMD1_OWN_HOST)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 netif_start_queue(dev);
643
644 local_irq_restore(flags);
645
646 return 0;
647}
648
649/* The LANCE interrupt handler. */
650
David Howells7d12e782006-10-05 14:55:46 +0100651static irqreturn_t lance_interrupt( int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652{
653 struct net_device *dev = dev_id;
654 struct lance_private *lp = netdev_priv(dev);
655 int csr0;
656 static int in_interrupt;
657
658 if (dev == NULL) {
659 DPRINTK( 1, ( "lance_interrupt(): invalid dev_id\n" ));
660 return IRQ_NONE;
661 }
662
663 if (in_interrupt)
664 DPRINTK( 2, ( "%s: Re-entering the interrupt handler.\n", dev->name ));
665 in_interrupt = 1;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400666
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667 still_more:
668 flush_cache_all();
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400669
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 AREG = CSR0;
671 csr0 = DREG;
672
673 /* ack interrupts */
674 DREG = csr0 & (CSR0_TINT | CSR0_RINT | CSR0_IDON);
675
676 /* clear errors */
677 if(csr0 & CSR0_ERR)
678 DREG = CSR0_BABL | CSR0_MERR | CSR0_CERR | CSR0_MISS;
679
680
681 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n",
682 dev->name, csr0, DREG ));
683
684 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */
685 int old_tx = lp->old_tx;
686
687// if(lance_debug >= 3) {
688// int i;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400689//
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690// printk("%s: tx int\n", dev->name);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400691//
Linus Torvalds1da177e2005-04-16 15:20:36 -0700692// for(i = 0; i < TX_RING_SIZE; i++)
693// printk("ring %d flag=%04x\n", i,
694// MEM->tx_head[i].flag);
695// }
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400696
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697 while( old_tx != lp->new_tx) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400698 struct lance_tx_head *head = &(MEM->tx_head[old_tx]);
699
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 DPRINTK(3, ("on tx_ring %d\n", old_tx));
701
702 if (head->flag & TMD1_OWN_CHIP)
703 break; /* It still hasn't been Txed */
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 if (head->flag & TMD1_ERR) {
706 int status = head->misc;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700707 dev->stats.tx_errors++;
708 if (status & TMD3_RTRY) dev->stats.tx_aborted_errors++;
709 if (status & TMD3_LCAR) dev->stats.tx_carrier_errors++;
710 if (status & TMD3_LCOL) dev->stats.tx_window_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 if (status & (TMD3_UFLO | TMD3_BUFF)) {
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700712 dev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 printk("%s: Tx FIFO error\n",
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400714 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 REGA(CSR0) = CSR0_STOP;
716 REGA(CSR3) = CSR3_BSWP;
717 lance_init_ring(dev);
718 REGA(CSR0) = CSR0_STRT | CSR0_INEA;
719 return IRQ_HANDLED;
720 }
721 } else if(head->flag & (TMD1_ENP | TMD1_STP)) {
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400722
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 head->flag &= ~(TMD1_ENP | TMD1_STP);
724 if(head->flag & (TMD1_ONE | TMD1_MORE))
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700725 dev->stats.collisions++;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400726
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700727 dev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 DPRINTK(3, ("cleared tx ring %d\n", old_tx));
729 }
730 old_tx = (old_tx +1) & TX_RING_MOD_MASK;
731 }
732
733 lp->old_tx = old_tx;
734 }
735
736
737 if (netif_queue_stopped(dev)) {
738 /* The ring is no longer full, clear tbusy. */
739 netif_start_queue(dev);
740 netif_wake_queue(dev);
741 }
742
743 if (csr0 & CSR0_RINT) /* Rx interrupt */
744 lance_rx( dev );
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 /* Log misc errors. */
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700747 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */
748 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 if (csr0 & CSR0_MERR) {
750 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
751 "status %04x.\n", dev->name, csr0 ));
752 /* Restart the chip. */
753 REGA(CSR0) = CSR0_STOP;
754 REGA(CSR3) = CSR3_BSWP;
755 lance_init_ring(dev);
756 REGA(CSR0) = CSR0_STRT | CSR0_INEA;
757 }
758
759
760 /* Clear any other interrupt, and set interrupt enable. */
761// DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
762// CSR0_IDON | CSR0_INEA;
763
764 REGA(CSR0) = CSR0_INEA;
765
766 if(DREG & (CSR0_RINT | CSR0_TINT)) {
767 DPRINTK(2, ("restarting interrupt, csr0=%#04x\n", DREG));
768 goto still_more;
769 }
770
771 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
772 dev->name, DREG ));
773 in_interrupt = 0;
774 return IRQ_HANDLED;
775}
776
777/* get packet, toss into skbuff */
778static int lance_rx( struct net_device *dev )
779{
780 struct lance_private *lp = netdev_priv(dev);
781 int entry = lp->new_rx;
782
783 /* If we own the next entry, it's a new packet. Send it up. */
784 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
785 struct lance_rx_head *head = &(MEM->rx_head[entry]);
786 int status = head->flag;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400787
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */
789 /* There is a tricky error noted by John Murphy,
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400790 <murf@perftech.com> to Russ Nelson: Even with
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 full-sized buffers it's possible for a jabber packet to use two
792 buffers, with only the last correctly noting the error. */
793 if (status & RMD1_ENP) /* Only count a general error at the */
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700794 dev->stats.rx_errors++; /* end of a packet.*/
795 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++;
796 if (status & RMD1_OFLO) dev->stats.rx_over_errors++;
797 if (status & RMD1_CRC) dev->stats.rx_crc_errors++;
798 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 head->flag &= (RMD1_ENP|RMD1_STP);
800 } else {
801 /* Malloc up new buffer, compatible with net-3. */
802// short pkt_len = head->msg_length;// & 0xfff;
803 short pkt_len = (head->msg_length & 0xfff) - 4;
804 struct sk_buff *skb;
805
806 if (pkt_len < 60) {
807 printk( "%s: Runt packet!\n", dev->name );
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700808 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 }
810 else {
811 skb = dev_alloc_skb( pkt_len+2 );
812 if (skb == NULL) {
813 DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
814 dev->name ));
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400815
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700816 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 head->msg_length = 0;
818 head->flag |= RMD1_OWN_CHIP;
819 lp->new_rx = (lp->new_rx+1) &
820 RX_RING_MOD_MASK;
821 }
822
823#if 0
824 if (lance_debug >= 3) {
Joe Perches0795af52007-10-03 17:59:30 -0700825 u_char *data = PKTBUF_ADDR(head);
Joe Perches0795af52007-10-03 17:59:30 -0700826 printk("%s: RX pkt %d type 0x%04x"
Johannes Berge1749612008-10-27 15:59:26 -0700827 " from %pM to %pM",
Joe Perches0795af52007-10-03 17:59:30 -0700828 dev->name, lp->new_tx, ((u_short *)data)[6],
Johannes Berge1749612008-10-27 15:59:26 -0700829 &data[6], data);
Joe Perches0795af52007-10-03 17:59:30 -0700830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 printk(" data %02x %02x %02x %02x %02x %02x %02x %02x "
832 "len %d at %08x\n",
833 data[15], data[16], data[17], data[18],
834 data[19], data[20], data[21], data[22],
835 pkt_len, data);
836 }
837#endif
838 if (lance_debug >= 3) {
839 u_char *data = PKTBUF_ADDR(head);
840 printk( "%s: RX pkt %d type 0x%04x len %d\n ", dev->name, entry, ((u_short *)data)[6], pkt_len);
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400841 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
843
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 skb_reserve( skb, 2 ); /* 16 byte align */
845 skb_put( skb, pkt_len ); /* Make room */
David S. Miller8c7b7fa2007-07-10 22:08:12 -0700846 skb_copy_to_linear_data(skb,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 PKTBUF_ADDR(head),
David S. Miller8c7b7fa2007-07-10 22:08:12 -0700848 pkt_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850 skb->protocol = eth_type_trans( skb, dev );
851 netif_rx( skb );
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700852 dev->stats.rx_packets++;
853 dev->stats.rx_bytes += pkt_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 }
855 }
856
857// head->buf_length = -PKT_BUF_SZ | 0xf000;
858 head->msg_length = 0;
859 head->flag = RMD1_OWN_CHIP;
860
861 entry = lp->new_rx = (lp->new_rx +1) & RX_RING_MOD_MASK;
862 }
863
864 /* From lance.c (Donald Becker): */
865 /* We should check that at least two ring entries are free.
866 If not, we should free one and mark stats->rx_dropped++. */
867
868 return 0;
869}
870
871
872static int lance_close( struct net_device *dev )
873{
874 struct lance_private *lp = netdev_priv(dev);
875
876 netif_stop_queue(dev);
877
878 AREG = CSR0;
879
880 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
881 dev->name, DREG ));
882
883 /* We stop the LANCE here -- it occasionally polls
884 memory if we don't. */
885 DREG = CSR0_STOP;
886 return 0;
887}
888
889
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890/* Set or clear the multicast filter for this adaptor.
891 num_addrs == -1 Promiscuous mode, receive all packets
892 num_addrs == 0 Normal mode, clear multicast list
893 num_addrs > 0 Multicast mode, receive normal and MC packets, and do
894 best-effort filtering.
895 */
896
897/* completely untested on a sun3 */
898static void set_multicast_list( struct net_device *dev )
899{
900 struct lance_private *lp = netdev_priv(dev);
901
902 if(netif_queue_stopped(dev))
903 /* Only possible if board is already started */
904 return;
905
906 /* We take the simple way out and always enable promiscuous mode. */
907 DREG = CSR0_STOP; /* Temporarily stop the lance. */
908
909 if (dev->flags & IFF_PROMISC) {
910 /* Log any net taps. */
Andy Gospodarekd5b20692006-09-11 17:39:18 -0400911 DPRINTK( 3, ( "%s: Promiscuous mode enabled.\n", dev->name ));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
913 } else {
914 short multicast_table[4];
915 int num_addrs = dev->mc_count;
916 int i;
917 /* We don't use the multicast table, but rely on upper-layer
918 * filtering. */
919 memset( multicast_table, (num_addrs == 0) ? 0 : -1,
920 sizeof(multicast_table) );
921 for( i = 0; i < 4; i++ )
922 REGA( CSR8+i ) = multicast_table[i];
923 REGA( CSR15 ) = 0; /* Unset promiscuous mode */
924 }
925
926 /*
927 * Always set BSWP after a STOP as STOP puts it back into
928 * little endian mode.
929 */
930 REGA( CSR3 ) = CSR3_BSWP;
931
932 /* Resume normal operation and reset AREG to CSR0 */
933 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
934}
935
936
937#ifdef MODULE
938
939static struct net_device *sun3lance_dev;
940
Al Viroafc8eb42006-06-14 18:50:53 -0400941int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942{
943 sun3lance_dev = sun3lance_probe(-1);
944 if (IS_ERR(sun3lance_dev))
945 return PTR_ERR(sun3lance_dev);
946 return 0;
947}
948
Al Viroafc8eb42006-06-14 18:50:53 -0400949void __exit cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950{
951 unregister_netdev(sun3lance_dev);
952#ifdef CONFIG_SUN3
Al Viro437111c2006-10-11 17:28:17 +0100953 iounmap((void __iomem *)sun3lance_dev->base_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954#endif
955 free_netdev(sun3lance_dev);
956}
957
958#endif /* MODULE */
959