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1da177e4 LT |
1 | /* sun3lance.c: Ethernet driver for SUN3 Lance chip */ |
2 | /* | |
3 | ||
6aa20a22 | 4 | Sun3 Lance ethernet driver, by Sam Creasey (sammy@users.qual.net). |
1da177e4 LT |
5 | This driver is a part of the linux kernel, and is thus distributed |
6 | under the GNU General Public License. | |
6aa20a22 | 7 | |
1da177e4 LT |
8 | 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, | |
6aa20a22 | 12 | linux has no such thing. |
1da177e4 LT |
13 | |
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 | |
6aa20a22 | 16 | linux sparc lance driver (sunlance.c). |
1da177e4 LT |
17 | |
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. | |
6aa20a22 | 21 | |
1da177e4 LT |
22 | */ |
23 | ||
24 | static 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 | ||
a1f8e7f7 | 41 | #include <asm/cacheflush.h> |
1da177e4 LT |
42 | #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 | |
4facfde9 | 59 | #define LANCE_IRQ IRQ_AUTO_3 |
1da177e4 LT |
60 | |
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 | |
71 | static int lance_debug = LANCE_DEBUG; | |
72 | #else | |
73 | static int lance_debug = 1; | |
74 | #endif | |
8d3b33f6 | 75 | module_param(lance_debug, int, 0); |
1da177e4 LT |
76 | MODULE_PARM_DESC(lance_debug, "SUN3 Lance debug level (0-3)"); |
77 | MODULE_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. */ | |
110 | struct 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 | ||
118 | struct 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. */ | |
127 | struct 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 */ | |
140 | struct 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 | ||
150 | struct 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 */ | |
155 | struct net_device_stats stats; | |
156 | /* These two must be longs for set_bit() */ | |
157 | long tx_full; | |
158 | long lock; | |
159 | }; | |
160 | ||
161 | /* I/O register access macros */ | |
162 | ||
163 | #define MEM lp->mem | |
164 | #define DREG lp->iobase[0] | |
165 | #define AREG lp->iobase[1] | |
e345d5ef | 166 | #define REGA(a) (*( AREG = (a), &DREG )) |
1da177e4 LT |
167 | |
168 | /* Definitions for the Lance */ | |
169 | ||
170 | /* tx_head flags */ | |
171 | #define TMD1_ENP 0x01 /* end of packet */ | |
172 | #define TMD1_STP 0x02 /* start of packet */ | |
173 | #define TMD1_DEF 0x04 /* deferred */ | |
174 | #define TMD1_ONE 0x08 /* one retry needed */ | |
175 | #define TMD1_MORE 0x10 /* more than one retry needed */ | |
176 | #define TMD1_ERR 0x40 /* error summary */ | |
177 | #define TMD1_OWN 0x80 /* ownership (set: chip owns) */ | |
178 | ||
179 | #define TMD1_OWN_CHIP TMD1_OWN | |
180 | #define TMD1_OWN_HOST 0 | |
181 | ||
182 | /* tx_head misc field */ | |
183 | #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */ | |
184 | #define TMD3_RTRY 0x0400 /* failed after 16 retries */ | |
185 | #define TMD3_LCAR 0x0800 /* carrier lost */ | |
186 | #define TMD3_LCOL 0x1000 /* late collision */ | |
187 | #define TMD3_UFLO 0x4000 /* underflow (late memory) */ | |
188 | #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */ | |
189 | ||
190 | /* rx_head flags */ | |
191 | #define RMD1_ENP 0x01 /* end of packet */ | |
192 | #define RMD1_STP 0x02 /* start of packet */ | |
193 | #define RMD1_BUFF 0x04 /* buffer error */ | |
194 | #define RMD1_CRC 0x08 /* CRC error */ | |
195 | #define RMD1_OFLO 0x10 /* overflow */ | |
196 | #define RMD1_FRAM 0x20 /* framing error */ | |
197 | #define RMD1_ERR 0x40 /* error summary */ | |
198 | #define RMD1_OWN 0x80 /* ownership (set: ship owns) */ | |
199 | ||
200 | #define RMD1_OWN_CHIP RMD1_OWN | |
201 | #define RMD1_OWN_HOST 0 | |
202 | ||
203 | /* register names */ | |
204 | #define CSR0 0 /* mode/status */ | |
205 | #define CSR1 1 /* init block addr (low) */ | |
206 | #define CSR2 2 /* init block addr (high) */ | |
207 | #define CSR3 3 /* misc */ | |
208 | #define CSR8 8 /* address filter */ | |
209 | #define CSR15 15 /* promiscuous mode */ | |
210 | ||
211 | /* CSR0 */ | |
212 | /* (R=readable, W=writeable, S=set on write, C=clear on write) */ | |
213 | #define CSR0_INIT 0x0001 /* initialize (RS) */ | |
214 | #define CSR0_STRT 0x0002 /* start (RS) */ | |
215 | #define CSR0_STOP 0x0004 /* stop (RS) */ | |
216 | #define CSR0_TDMD 0x0008 /* transmit demand (RS) */ | |
217 | #define CSR0_TXON 0x0010 /* transmitter on (R) */ | |
218 | #define CSR0_RXON 0x0020 /* receiver on (R) */ | |
219 | #define CSR0_INEA 0x0040 /* interrupt enable (RW) */ | |
220 | #define CSR0_INTR 0x0080 /* interrupt active (R) */ | |
221 | #define CSR0_IDON 0x0100 /* initialization done (RC) */ | |
222 | #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */ | |
223 | #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */ | |
224 | #define CSR0_MERR 0x0800 /* memory error (RC) */ | |
225 | #define CSR0_MISS 0x1000 /* missed frame (RC) */ | |
226 | #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */ | |
227 | #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */ | |
228 | #define CSR0_ERR 0x8000 /* error (RC) */ | |
229 | ||
230 | /* CSR3 */ | |
231 | #define CSR3_BCON 0x0001 /* byte control */ | |
232 | #define CSR3_ACON 0x0002 /* ALE control */ | |
233 | #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */ | |
234 | ||
235 | /***************************** Prototypes *****************************/ | |
236 | ||
237 | static int lance_probe( struct net_device *dev); | |
238 | static int lance_open( struct net_device *dev ); | |
239 | static void lance_init_ring( struct net_device *dev ); | |
240 | static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev ); | |
7d12e780 | 241 | static irqreturn_t lance_interrupt( int irq, void *dev_id); |
1da177e4 LT |
242 | static int lance_rx( struct net_device *dev ); |
243 | static int lance_close( struct net_device *dev ); | |
244 | static struct net_device_stats *lance_get_stats( struct net_device *dev ); | |
245 | static void set_multicast_list( struct net_device *dev ); | |
246 | ||
247 | /************************* End of Prototypes **************************/ | |
248 | ||
249 | struct net_device * __init sun3lance_probe(int unit) | |
250 | { | |
251 | struct net_device *dev; | |
252 | static int found; | |
253 | int err = -ENODEV; | |
254 | ||
255 | /* check that this machine has an onboard lance */ | |
256 | switch(idprom->id_machtype) { | |
257 | case SM_SUN3|SM_3_50: | |
258 | case SM_SUN3|SM_3_60: | |
259 | case SM_SUN3X|SM_3_80: | |
260 | /* these machines have lance */ | |
261 | break; | |
262 | ||
263 | default: | |
264 | return ERR_PTR(-ENODEV); | |
265 | } | |
266 | ||
267 | if (found) | |
268 | return ERR_PTR(-ENODEV); | |
269 | ||
270 | dev = alloc_etherdev(sizeof(struct lance_private)); | |
271 | if (!dev) | |
272 | return ERR_PTR(-ENOMEM); | |
273 | if (unit >= 0) { | |
274 | sprintf(dev->name, "eth%d", unit); | |
275 | netdev_boot_setup_check(dev); | |
276 | } | |
277 | SET_MODULE_OWNER(dev); | |
278 | ||
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 | ||
288 | out1: | |
289 | #ifdef CONFIG_SUN3 | |
437111ca | 290 | iounmap((void __iomem *)dev->base_addr); |
1da177e4 LT |
291 | #endif |
292 | out: | |
293 | free_netdev(dev); | |
294 | return ERR_PTR(err); | |
295 | } | |
296 | ||
297 | static int __init lance_probe( struct net_device *dev) | |
6aa20a22 | 298 | { |
1da177e4 | 299 | unsigned long ioaddr; |
6aa20a22 | 300 | |
1da177e4 LT |
301 | 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) */ | |
6aa20a22 | 317 | |
1da177e4 LT |
318 | 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 | |
437111ca | 330 | iounmap((void __iomem *)ioaddr); |
1da177e4 LT |
331 | #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); | |
c14bac62 CG |
339 | 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 | } | |
1da177e4 LT |
346 | |
347 | lp->iobase = (volatile unsigned short *)ioaddr; | |
348 | dev->base_addr = (unsigned long)ioaddr; /* informational only */ | |
349 | ||
6aa20a22 | 350 | REGA(CSR0) = CSR0_STOP; |
1da177e4 | 351 | |
c14bac62 CG |
352 | 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 | } | |
1da177e4 LT |
360 | 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 | ||
381 | for( i = 0; i < 6; ++i ) | |
382 | printk( "%02x%s", dev->dev_addr[i], (i < 5) ? ":" : "\n" ); | |
383 | ||
384 | MEM->init.mode = 0x0000; | |
385 | MEM->init.filter[0] = 0x00000000; | |
386 | MEM->init.filter[1] = 0x00000000; | |
387 | MEM->init.rdra = dvma_vtob(MEM->rx_head); | |
388 | MEM->init.rlen = (RX_LOG_RING_SIZE << 13) | | |
389 | (dvma_vtob(MEM->rx_head) >> 16); | |
390 | MEM->init.tdra = dvma_vtob(MEM->tx_head); | |
391 | MEM->init.tlen = (TX_LOG_RING_SIZE << 13) | | |
392 | (dvma_vtob(MEM->tx_head) >> 16); | |
393 | ||
394 | DPRINTK(2, ("initaddr: %08lx rx_ring: %08lx tx_ring: %08lx\n", | |
395 | dvma_vtob(&(MEM->init)), dvma_vtob(MEM->rx_head), | |
6aa20a22 | 396 | (dvma_vtob(MEM->tx_head)))); |
1da177e4 LT |
397 | |
398 | if (did_version++ == 0) | |
399 | printk( version ); | |
400 | ||
401 | /* The LANCE-specific entries in the device structure. */ | |
402 | dev->open = &lance_open; | |
403 | dev->hard_start_xmit = &lance_start_xmit; | |
404 | dev->stop = &lance_close; | |
405 | dev->get_stats = &lance_get_stats; | |
406 | dev->set_multicast_list = &set_multicast_list; | |
a5d361fc | 407 | dev->set_mac_address = NULL; |
1da177e4 LT |
408 | // KLUDGE -- REMOVE ME |
409 | set_bit(__LINK_STATE_PRESENT, &dev->state); | |
410 | ||
411 | ||
412 | memset( &lp->stats, 0, sizeof(lp->stats) ); | |
413 | ||
414 | return 1; | |
415 | } | |
416 | ||
417 | static int lance_open( struct net_device *dev ) | |
418 | { | |
419 | struct lance_private *lp = netdev_priv(dev); | |
420 | int i; | |
421 | ||
422 | DPRINTK( 2, ( "%s: lance_open()\n", dev->name )); | |
423 | ||
424 | REGA(CSR0) = CSR0_STOP; | |
425 | ||
426 | lance_init_ring(dev); | |
427 | ||
428 | /* From now on, AREG is kept to point to CSR0 */ | |
429 | REGA(CSR0) = CSR0_INIT; | |
430 | ||
431 | i = 1000000; | |
432 | while (--i > 0) | |
433 | if (DREG & CSR0_IDON) | |
434 | break; | |
435 | if (i < 0 || (DREG & CSR0_ERR)) { | |
436 | DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n", | |
437 | dev->name, i, DREG )); | |
438 | DREG = CSR0_STOP; | |
439 | return( -EIO ); | |
440 | } | |
441 | ||
442 | DREG = CSR0_IDON | CSR0_STRT | CSR0_INEA; | |
443 | ||
444 | netif_start_queue(dev); | |
6aa20a22 | 445 | |
1da177e4 LT |
446 | DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG )); |
447 | ||
448 | return( 0 ); | |
449 | } | |
450 | ||
451 | ||
452 | /* Initialize the LANCE Rx and Tx rings. */ | |
453 | ||
454 | static void lance_init_ring( struct net_device *dev ) | |
455 | { | |
456 | struct lance_private *lp = netdev_priv(dev); | |
457 | int i; | |
458 | ||
459 | lp->lock = 0; | |
460 | lp->tx_full = 0; | |
461 | lp->new_rx = lp->new_tx = 0; | |
462 | lp->old_rx = lp->old_tx = 0; | |
463 | ||
464 | for( i = 0; i < TX_RING_SIZE; i++ ) { | |
465 | MEM->tx_head[i].base = dvma_vtob(MEM->tx_data[i]); | |
466 | MEM->tx_head[i].flag = 0; | |
6aa20a22 | 467 | MEM->tx_head[i].base_hi = |
1da177e4 LT |
468 | (dvma_vtob(MEM->tx_data[i])) >>16; |
469 | MEM->tx_head[i].length = 0; | |
470 | MEM->tx_head[i].misc = 0; | |
471 | } | |
472 | ||
473 | for( i = 0; i < RX_RING_SIZE; i++ ) { | |
474 | MEM->rx_head[i].base = dvma_vtob(MEM->rx_data[i]); | |
475 | MEM->rx_head[i].flag = RMD1_OWN_CHIP; | |
6aa20a22 | 476 | MEM->rx_head[i].base_hi = |
1da177e4 LT |
477 | (dvma_vtob(MEM->rx_data[i])) >> 16; |
478 | MEM->rx_head[i].buf_length = -PKT_BUF_SZ | 0xf000; | |
479 | MEM->rx_head[i].msg_length = 0; | |
480 | } | |
481 | ||
482 | /* tell the card it's ether address, bytes swapped */ | |
483 | MEM->init.hwaddr[0] = dev->dev_addr[1]; | |
484 | MEM->init.hwaddr[1] = dev->dev_addr[0]; | |
485 | MEM->init.hwaddr[2] = dev->dev_addr[3]; | |
486 | MEM->init.hwaddr[3] = dev->dev_addr[2]; | |
487 | MEM->init.hwaddr[4] = dev->dev_addr[5]; | |
488 | MEM->init.hwaddr[5] = dev->dev_addr[4]; | |
489 | ||
490 | MEM->init.mode = 0x0000; | |
491 | MEM->init.filter[0] = 0x00000000; | |
492 | MEM->init.filter[1] = 0x00000000; | |
493 | MEM->init.rdra = dvma_vtob(MEM->rx_head); | |
494 | MEM->init.rlen = (RX_LOG_RING_SIZE << 13) | | |
495 | (dvma_vtob(MEM->rx_head) >> 16); | |
496 | MEM->init.tdra = dvma_vtob(MEM->tx_head); | |
497 | MEM->init.tlen = (TX_LOG_RING_SIZE << 13) | | |
498 | (dvma_vtob(MEM->tx_head) >> 16); | |
499 | ||
500 | ||
501 | /* tell the lance the address of its init block */ | |
502 | REGA(CSR1) = dvma_vtob(&(MEM->init)); | |
503 | REGA(CSR2) = dvma_vtob(&(MEM->init)) >> 16; | |
504 | ||
505 | #ifdef CONFIG_SUN3X | |
506 | REGA(CSR3) = CSR3_BSWP | CSR3_ACON | CSR3_BCON; | |
507 | #else | |
508 | REGA(CSR3) = CSR3_BSWP; | |
509 | #endif | |
510 | ||
511 | } | |
512 | ||
513 | ||
514 | static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev ) | |
515 | { | |
516 | struct lance_private *lp = netdev_priv(dev); | |
517 | int entry, len; | |
518 | struct lance_tx_head *head; | |
519 | unsigned long flags; | |
520 | ||
521 | DPRINTK( 1, ( "%s: transmit start.\n", | |
522 | dev->name)); | |
523 | ||
524 | /* Transmitter timeout, serious problems. */ | |
525 | if (netif_queue_stopped(dev)) { | |
526 | int tickssofar = jiffies - dev->trans_start; | |
527 | if (tickssofar < 20) | |
528 | return( 1 ); | |
529 | ||
530 | DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n", | |
531 | dev->name, DREG )); | |
532 | DREG = CSR0_STOP; | |
533 | /* | |
534 | * Always set BSWP after a STOP as STOP puts it back into | |
535 | * little endian mode. | |
536 | */ | |
537 | REGA(CSR3) = CSR3_BSWP; | |
538 | lp->stats.tx_errors++; | |
539 | ||
540 | if(lance_debug >= 2) { | |
541 | int i; | |
542 | printk("Ring data: old_tx %d new_tx %d%s new_rx %d\n", | |
543 | lp->old_tx, lp->new_tx, | |
544 | lp->tx_full ? " (full)" : "", | |
545 | lp->new_rx ); | |
546 | for( i = 0 ; i < RX_RING_SIZE; i++ ) | |
547 | printk( "rx #%d: base=%04x blen=%04x mlen=%04x\n", | |
548 | i, MEM->rx_head[i].base, | |
549 | -MEM->rx_head[i].buf_length, | |
550 | MEM->rx_head[i].msg_length); | |
551 | for( i = 0 ; i < TX_RING_SIZE; i++ ) | |
552 | printk("tx #%d: base=%04x len=%04x misc=%04x\n", | |
553 | i, MEM->tx_head[i].base, | |
554 | -MEM->tx_head[i].length, | |
555 | MEM->tx_head[i].misc ); | |
556 | } | |
557 | ||
558 | lance_init_ring(dev); | |
559 | REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT; | |
6aa20a22 | 560 | |
1da177e4 LT |
561 | netif_start_queue(dev); |
562 | dev->trans_start = jiffies; | |
6aa20a22 | 563 | |
1da177e4 LT |
564 | return 0; |
565 | } | |
566 | ||
6aa20a22 | 567 | |
1da177e4 LT |
568 | /* Block a timer-based transmit from overlapping. This could better be |
569 | done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */ | |
570 | ||
571 | /* Block a timer-based transmit from overlapping with us by | |
572 | stopping the queue for a bit... */ | |
6aa20a22 | 573 | |
1da177e4 | 574 | netif_stop_queue(dev); |
6aa20a22 | 575 | |
1da177e4 LT |
576 | if (test_and_set_bit( 0, (void*)&lp->lock ) != 0) { |
577 | printk( "%s: tx queue lock!.\n", dev->name); | |
578 | /* don't clear dev->tbusy flag. */ | |
579 | return 1; | |
580 | } | |
581 | ||
582 | AREG = CSR0; | |
583 | DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n", | |
584 | dev->name, DREG )); | |
585 | ||
586 | #ifdef CONFIG_SUN3X | |
587 | /* this weirdness doesn't appear on sun3... */ | |
588 | if(!(DREG & CSR0_INIT)) { | |
589 | DPRINTK( 1, ("INIT not set, reinitializing...\n")); | |
590 | REGA( CSR0 ) = CSR0_STOP; | |
591 | lance_init_ring(dev); | |
592 | REGA( CSR0 ) = CSR0_INIT | CSR0_STRT; | |
593 | } | |
594 | #endif | |
595 | ||
596 | /* Fill in a Tx ring entry */ | |
597 | #if 0 | |
598 | if (lance_debug >= 2) { | |
599 | u_char *p; | |
600 | int i; | |
601 | printk( "%s: TX pkt %d type 0x%04x from ", dev->name, | |
602 | lp->new_tx, ((u_short *)skb->data)[6]); | |
603 | for( p = &((u_char *)skb->data)[6], i = 0; i < 6; i++ ) | |
604 | printk("%02x%s", *p++, i != 5 ? ":" : "" ); | |
605 | printk(" to "); | |
606 | for( p = (u_char *)skb->data, i = 0; i < 6; i++ ) | |
607 | printk("%02x%s", *p++, i != 5 ? ":" : "" ); | |
608 | printk(" data at 0x%08x len %d\n", (int)skb->data, | |
609 | (int)skb->len ); | |
610 | } | |
6aa20a22 | 611 | #endif |
1da177e4 LT |
612 | /* We're not prepared for the int until the last flags are set/reset. |
613 | * And the int may happen already after setting the OWN_CHIP... */ | |
614 | local_irq_save(flags); | |
615 | ||
616 | /* Mask to ring buffer boundary. */ | |
617 | entry = lp->new_tx; | |
618 | head = &(MEM->tx_head[entry]); | |
619 | ||
620 | /* Caution: the write order is important here, set the "ownership" bits | |
621 | * last. | |
622 | */ | |
623 | ||
624 | /* the sun3's lance needs it's buffer padded to the minimum | |
625 | size */ | |
626 | len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN; | |
627 | ||
628 | // head->length = -len; | |
629 | head->length = (-len) | 0xf000; | |
630 | head->misc = 0; | |
631 | ||
d626f62b | 632 | skb_copy_from_linear_data(skb, PKTBUF_ADDR(head), skb->len); |
1da177e4 LT |
633 | if (len != skb->len) |
634 | memset(PKTBUF_ADDR(head) + skb->len, 0, len-skb->len); | |
635 | ||
636 | head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP; | |
637 | lp->new_tx = (lp->new_tx + 1) & TX_RING_MOD_MASK; | |
638 | lp->stats.tx_bytes += skb->len; | |
639 | ||
640 | /* Trigger an immediate send poll. */ | |
641 | REGA(CSR0) = CSR0_INEA | CSR0_TDMD | CSR0_STRT; | |
642 | AREG = CSR0; | |
643 | DPRINTK( 2, ( "%s: lance_start_xmit() exiting, csr0 %4.4x.\n", | |
644 | dev->name, DREG )); | |
645 | dev->trans_start = jiffies; | |
646 | dev_kfree_skb( skb ); | |
647 | ||
648 | lp->lock = 0; | |
649 | if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) == | |
6aa20a22 | 650 | TMD1_OWN_HOST) |
1da177e4 LT |
651 | netif_start_queue(dev); |
652 | ||
653 | local_irq_restore(flags); | |
654 | ||
655 | return 0; | |
656 | } | |
657 | ||
658 | /* The LANCE interrupt handler. */ | |
659 | ||
7d12e780 | 660 | static irqreturn_t lance_interrupt( int irq, void *dev_id) |
1da177e4 LT |
661 | { |
662 | struct net_device *dev = dev_id; | |
663 | struct lance_private *lp = netdev_priv(dev); | |
664 | int csr0; | |
665 | static int in_interrupt; | |
666 | ||
667 | if (dev == NULL) { | |
668 | DPRINTK( 1, ( "lance_interrupt(): invalid dev_id\n" )); | |
669 | return IRQ_NONE; | |
670 | } | |
671 | ||
672 | if (in_interrupt) | |
673 | DPRINTK( 2, ( "%s: Re-entering the interrupt handler.\n", dev->name )); | |
674 | in_interrupt = 1; | |
6aa20a22 | 675 | |
1da177e4 LT |
676 | still_more: |
677 | flush_cache_all(); | |
6aa20a22 | 678 | |
1da177e4 LT |
679 | AREG = CSR0; |
680 | csr0 = DREG; | |
681 | ||
682 | /* ack interrupts */ | |
683 | DREG = csr0 & (CSR0_TINT | CSR0_RINT | CSR0_IDON); | |
684 | ||
685 | /* clear errors */ | |
686 | if(csr0 & CSR0_ERR) | |
687 | DREG = CSR0_BABL | CSR0_MERR | CSR0_CERR | CSR0_MISS; | |
688 | ||
689 | ||
690 | DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n", | |
691 | dev->name, csr0, DREG )); | |
692 | ||
693 | if (csr0 & CSR0_TINT) { /* Tx-done interrupt */ | |
694 | int old_tx = lp->old_tx; | |
695 | ||
696 | // if(lance_debug >= 3) { | |
697 | // int i; | |
6aa20a22 | 698 | // |
1da177e4 | 699 | // printk("%s: tx int\n", dev->name); |
6aa20a22 | 700 | // |
1da177e4 LT |
701 | // for(i = 0; i < TX_RING_SIZE; i++) |
702 | // printk("ring %d flag=%04x\n", i, | |
703 | // MEM->tx_head[i].flag); | |
704 | // } | |
6aa20a22 | 705 | |
1da177e4 | 706 | while( old_tx != lp->new_tx) { |
6aa20a22 JG |
707 | struct lance_tx_head *head = &(MEM->tx_head[old_tx]); |
708 | ||
1da177e4 LT |
709 | DPRINTK(3, ("on tx_ring %d\n", old_tx)); |
710 | ||
711 | if (head->flag & TMD1_OWN_CHIP) | |
712 | break; /* It still hasn't been Txed */ | |
6aa20a22 | 713 | |
1da177e4 LT |
714 | if (head->flag & TMD1_ERR) { |
715 | int status = head->misc; | |
716 | lp->stats.tx_errors++; | |
717 | if (status & TMD3_RTRY) lp->stats.tx_aborted_errors++; | |
718 | if (status & TMD3_LCAR) lp->stats.tx_carrier_errors++; | |
719 | if (status & TMD3_LCOL) lp->stats.tx_window_errors++; | |
720 | if (status & (TMD3_UFLO | TMD3_BUFF)) { | |
721 | lp->stats.tx_fifo_errors++; | |
722 | printk("%s: Tx FIFO error\n", | |
6aa20a22 | 723 | dev->name); |
1da177e4 LT |
724 | REGA(CSR0) = CSR0_STOP; |
725 | REGA(CSR3) = CSR3_BSWP; | |
726 | lance_init_ring(dev); | |
727 | REGA(CSR0) = CSR0_STRT | CSR0_INEA; | |
728 | return IRQ_HANDLED; | |
729 | } | |
730 | } else if(head->flag & (TMD1_ENP | TMD1_STP)) { | |
6aa20a22 | 731 | |
1da177e4 LT |
732 | head->flag &= ~(TMD1_ENP | TMD1_STP); |
733 | if(head->flag & (TMD1_ONE | TMD1_MORE)) | |
734 | lp->stats.collisions++; | |
6aa20a22 | 735 | |
1da177e4 LT |
736 | lp->stats.tx_packets++; |
737 | DPRINTK(3, ("cleared tx ring %d\n", old_tx)); | |
738 | } | |
739 | old_tx = (old_tx +1) & TX_RING_MOD_MASK; | |
740 | } | |
741 | ||
742 | lp->old_tx = old_tx; | |
743 | } | |
744 | ||
745 | ||
746 | if (netif_queue_stopped(dev)) { | |
747 | /* The ring is no longer full, clear tbusy. */ | |
748 | netif_start_queue(dev); | |
749 | netif_wake_queue(dev); | |
750 | } | |
751 | ||
752 | if (csr0 & CSR0_RINT) /* Rx interrupt */ | |
753 | lance_rx( dev ); | |
6aa20a22 | 754 | |
1da177e4 LT |
755 | /* Log misc errors. */ |
756 | if (csr0 & CSR0_BABL) lp->stats.tx_errors++; /* Tx babble. */ | |
757 | if (csr0 & CSR0_MISS) lp->stats.rx_errors++; /* Missed a Rx frame. */ | |
758 | if (csr0 & CSR0_MERR) { | |
759 | DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), " | |
760 | "status %04x.\n", dev->name, csr0 )); | |
761 | /* Restart the chip. */ | |
762 | REGA(CSR0) = CSR0_STOP; | |
763 | REGA(CSR3) = CSR3_BSWP; | |
764 | lance_init_ring(dev); | |
765 | REGA(CSR0) = CSR0_STRT | CSR0_INEA; | |
766 | } | |
767 | ||
768 | ||
769 | /* Clear any other interrupt, and set interrupt enable. */ | |
770 | // DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR | | |
771 | // CSR0_IDON | CSR0_INEA; | |
772 | ||
773 | REGA(CSR0) = CSR0_INEA; | |
774 | ||
775 | if(DREG & (CSR0_RINT | CSR0_TINT)) { | |
776 | DPRINTK(2, ("restarting interrupt, csr0=%#04x\n", DREG)); | |
777 | goto still_more; | |
778 | } | |
779 | ||
780 | DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n", | |
781 | dev->name, DREG )); | |
782 | in_interrupt = 0; | |
783 | return IRQ_HANDLED; | |
784 | } | |
785 | ||
786 | /* get packet, toss into skbuff */ | |
787 | static int lance_rx( struct net_device *dev ) | |
788 | { | |
789 | struct lance_private *lp = netdev_priv(dev); | |
790 | int entry = lp->new_rx; | |
791 | ||
792 | /* If we own the next entry, it's a new packet. Send it up. */ | |
793 | while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) { | |
794 | struct lance_rx_head *head = &(MEM->rx_head[entry]); | |
795 | int status = head->flag; | |
6aa20a22 | 796 | |
1da177e4 LT |
797 | if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */ |
798 | /* There is a tricky error noted by John Murphy, | |
6aa20a22 | 799 | <murf@perftech.com> to Russ Nelson: Even with |
1da177e4 LT |
800 | full-sized buffers it's possible for a jabber packet to use two |
801 | buffers, with only the last correctly noting the error. */ | |
802 | if (status & RMD1_ENP) /* Only count a general error at the */ | |
803 | lp->stats.rx_errors++; /* end of a packet.*/ | |
804 | if (status & RMD1_FRAM) lp->stats.rx_frame_errors++; | |
805 | if (status & RMD1_OFLO) lp->stats.rx_over_errors++; | |
806 | if (status & RMD1_CRC) lp->stats.rx_crc_errors++; | |
807 | if (status & RMD1_BUFF) lp->stats.rx_fifo_errors++; | |
808 | head->flag &= (RMD1_ENP|RMD1_STP); | |
809 | } else { | |
810 | /* Malloc up new buffer, compatible with net-3. */ | |
811 | // short pkt_len = head->msg_length;// & 0xfff; | |
812 | short pkt_len = (head->msg_length & 0xfff) - 4; | |
813 | struct sk_buff *skb; | |
814 | ||
815 | if (pkt_len < 60) { | |
816 | printk( "%s: Runt packet!\n", dev->name ); | |
817 | lp->stats.rx_errors++; | |
818 | } | |
819 | else { | |
820 | skb = dev_alloc_skb( pkt_len+2 ); | |
821 | if (skb == NULL) { | |
822 | DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n", | |
823 | dev->name )); | |
6aa20a22 | 824 | |
1da177e4 LT |
825 | lp->stats.rx_dropped++; |
826 | head->msg_length = 0; | |
827 | head->flag |= RMD1_OWN_CHIP; | |
828 | lp->new_rx = (lp->new_rx+1) & | |
829 | RX_RING_MOD_MASK; | |
830 | } | |
831 | ||
832 | #if 0 | |
833 | if (lance_debug >= 3) { | |
834 | u_char *data = PKTBUF_ADDR(head), *p; | |
835 | printk( "%s: RX pkt %d type 0x%04x from ", dev->name, entry, ((u_short *)data)[6]); | |
836 | for( p = &data[6], i = 0; i < 6; i++ ) | |
837 | printk("%02x%s", *p++, i != 5 ? ":" : "" ); | |
838 | printk(" to "); | |
839 | for( p = data, i = 0; i < 6; i++ ) | |
840 | printk("%02x%s", *p++, i != 5 ? ":" : "" ); | |
841 | printk(" data %02x %02x %02x %02x %02x %02x %02x %02x " | |
842 | "len %d at %08x\n", | |
843 | data[15], data[16], data[17], data[18], | |
844 | data[19], data[20], data[21], data[22], | |
845 | pkt_len, data); | |
846 | } | |
847 | #endif | |
848 | if (lance_debug >= 3) { | |
849 | u_char *data = PKTBUF_ADDR(head); | |
850 | printk( "%s: RX pkt %d type 0x%04x len %d\n ", dev->name, entry, ((u_short *)data)[6], pkt_len); | |
6aa20a22 | 851 | } |
1da177e4 LT |
852 | |
853 | ||
1da177e4 LT |
854 | skb_reserve( skb, 2 ); /* 16 byte align */ |
855 | skb_put( skb, pkt_len ); /* Make room */ | |
27d7ff46 | 856 | // skb_copy_to_linear_data(skb, PKTBUF_ADDR(head), pkt_len); |
1da177e4 LT |
857 | eth_copy_and_sum(skb, |
858 | PKTBUF_ADDR(head), | |
859 | pkt_len, 0); | |
860 | ||
861 | skb->protocol = eth_type_trans( skb, dev ); | |
862 | netif_rx( skb ); | |
863 | dev->last_rx = jiffies; | |
864 | lp->stats.rx_packets++; | |
865 | lp->stats.rx_bytes += pkt_len; | |
866 | } | |
867 | } | |
868 | ||
869 | // head->buf_length = -PKT_BUF_SZ | 0xf000; | |
870 | head->msg_length = 0; | |
871 | head->flag = RMD1_OWN_CHIP; | |
872 | ||
873 | entry = lp->new_rx = (lp->new_rx +1) & RX_RING_MOD_MASK; | |
874 | } | |
875 | ||
876 | /* From lance.c (Donald Becker): */ | |
877 | /* We should check that at least two ring entries are free. | |
878 | If not, we should free one and mark stats->rx_dropped++. */ | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | ||
884 | static int lance_close( struct net_device *dev ) | |
885 | { | |
886 | struct lance_private *lp = netdev_priv(dev); | |
887 | ||
888 | netif_stop_queue(dev); | |
889 | ||
890 | AREG = CSR0; | |
891 | ||
892 | DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n", | |
893 | dev->name, DREG )); | |
894 | ||
895 | /* We stop the LANCE here -- it occasionally polls | |
896 | memory if we don't. */ | |
897 | DREG = CSR0_STOP; | |
898 | return 0; | |
899 | } | |
900 | ||
901 | ||
902 | static struct net_device_stats *lance_get_stats( struct net_device *dev ) | |
903 | { | |
904 | struct lance_private *lp = netdev_priv(dev); | |
905 | ||
906 | return &lp->stats; | |
907 | } | |
908 | ||
909 | ||
910 | /* Set or clear the multicast filter for this adaptor. | |
911 | num_addrs == -1 Promiscuous mode, receive all packets | |
912 | num_addrs == 0 Normal mode, clear multicast list | |
913 | num_addrs > 0 Multicast mode, receive normal and MC packets, and do | |
914 | best-effort filtering. | |
915 | */ | |
916 | ||
917 | /* completely untested on a sun3 */ | |
918 | static void set_multicast_list( struct net_device *dev ) | |
919 | { | |
920 | struct lance_private *lp = netdev_priv(dev); | |
921 | ||
922 | if(netif_queue_stopped(dev)) | |
923 | /* Only possible if board is already started */ | |
924 | return; | |
925 | ||
926 | /* We take the simple way out and always enable promiscuous mode. */ | |
927 | DREG = CSR0_STOP; /* Temporarily stop the lance. */ | |
928 | ||
929 | if (dev->flags & IFF_PROMISC) { | |
930 | /* Log any net taps. */ | |
d5b20697 | 931 | DPRINTK( 3, ( "%s: Promiscuous mode enabled.\n", dev->name )); |
1da177e4 LT |
932 | REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */ |
933 | } else { | |
934 | short multicast_table[4]; | |
935 | int num_addrs = dev->mc_count; | |
936 | int i; | |
937 | /* We don't use the multicast table, but rely on upper-layer | |
938 | * filtering. */ | |
939 | memset( multicast_table, (num_addrs == 0) ? 0 : -1, | |
940 | sizeof(multicast_table) ); | |
941 | for( i = 0; i < 4; i++ ) | |
942 | REGA( CSR8+i ) = multicast_table[i]; | |
943 | REGA( CSR15 ) = 0; /* Unset promiscuous mode */ | |
944 | } | |
945 | ||
946 | /* | |
947 | * Always set BSWP after a STOP as STOP puts it back into | |
948 | * little endian mode. | |
949 | */ | |
950 | REGA( CSR3 ) = CSR3_BSWP; | |
951 | ||
952 | /* Resume normal operation and reset AREG to CSR0 */ | |
953 | REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT; | |
954 | } | |
955 | ||
956 | ||
957 | #ifdef MODULE | |
958 | ||
959 | static struct net_device *sun3lance_dev; | |
960 | ||
afc8eb46 | 961 | int __init init_module(void) |
1da177e4 LT |
962 | { |
963 | sun3lance_dev = sun3lance_probe(-1); | |
964 | if (IS_ERR(sun3lance_dev)) | |
965 | return PTR_ERR(sun3lance_dev); | |
966 | return 0; | |
967 | } | |
968 | ||
afc8eb46 | 969 | void __exit cleanup_module(void) |
1da177e4 LT |
970 | { |
971 | unregister_netdev(sun3lance_dev); | |
972 | #ifdef CONFIG_SUN3 | |
437111ca | 973 | iounmap((void __iomem *)sun3lance_dev->base_addr); |
1da177e4 LT |
974 | #endif |
975 | free_netdev(sun3lance_dev); | |
976 | } | |
977 | ||
978 | #endif /* MODULE */ | |
979 |