1 | /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 |
2 | * driver for linux. |
3 | * Written 1996 by Russell Nelson, with reference to skeleton.c |
4 | * written 1993-1994 by Donald Becker. |
5 | * |
6 | * This software may be used and distributed according to the terms |
7 | * of the GNU General Public License, incorporated herein by reference. |
8 | * |
9 | * The author may be reached at nelson@crynwr.com, Crynwr |
10 | * Software, 521 Pleasant Valley Rd., Potsdam, NY 13676 |
11 | * |
12 | * Other contributors: |
13 | * Mike Cruse : mcruse@cti-ltd.com |
14 | * Russ Nelson |
15 | * Melody Lee : ethernet@crystal.cirrus.com |
16 | * Alan Cox |
17 | * Andrew Morton |
18 | * Oskar Schirmer : oskar@scara.com |
19 | * Deepak Saxena : dsaxena@plexity.net |
20 | * Dmitry Pervushin : dpervushin@ru.mvista.com |
21 | * Deepak Saxena : dsaxena@plexity.net |
22 | * Domenico Andreoli : cavokz@gmail.com |
23 | */ |
24 | |
25 | |
26 | /* |
27 | * Set this to zero to disable DMA code |
28 | * |
29 | * Note that even if DMA is turned off we still support the 'dma' and 'use_dma' |
30 | * module options so we don't break any startup scripts. |
31 | */ |
32 | #ifndef CONFIG_ISA_DMA_API |
33 | #define ALLOW_DMA 0 |
34 | #else |
35 | #define ALLOW_DMA 1 |
36 | #endif |
37 | |
38 | /* |
39 | * Set this to zero to remove all the debug statements via |
40 | * dead code elimination |
41 | */ |
42 | #define DEBUGGING 1 |
43 | |
44 | /* Sources: |
45 | * Crynwr packet driver epktisa. |
46 | * Crystal Semiconductor data sheets. |
47 | */ |
48 | |
49 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
50 | |
51 | #include <linux/module.h> |
52 | #include <linux/printk.h> |
53 | #include <linux/errno.h> |
54 | #include <linux/netdevice.h> |
55 | #include <linux/etherdevice.h> |
56 | #include <linux/of.h> |
57 | #include <linux/platform_device.h> |
58 | #include <linux/kernel.h> |
59 | #include <linux/types.h> |
60 | #include <linux/fcntl.h> |
61 | #include <linux/interrupt.h> |
62 | #include <linux/ioport.h> |
63 | #include <linux/in.h> |
64 | #include <linux/jiffies.h> |
65 | #include <linux/skbuff.h> |
66 | #include <linux/spinlock.h> |
67 | #include <linux/string.h> |
68 | #include <linux/init.h> |
69 | #include <linux/bitops.h> |
70 | #include <linux/delay.h> |
71 | #include <linux/gfp.h> |
72 | #include <linux/io.h> |
73 | |
74 | #include <net/Space.h> |
75 | |
76 | #include <asm/irq.h> |
77 | #include <linux/atomic.h> |
78 | #if ALLOW_DMA |
79 | #include <asm/dma.h> |
80 | #endif |
81 | |
82 | #include "cs89x0.h" |
83 | |
84 | #define cs89_dbg(val, level, fmt, ...) \ |
85 | do { \ |
86 | if (val <= net_debug) \ |
87 | pr_##level(fmt, ##__VA_ARGS__); \ |
88 | } while (0) |
89 | |
90 | static char version[] __initdata = |
91 | "v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton" ; |
92 | |
93 | #define DRV_NAME "cs89x0" |
94 | |
95 | /* First, a few definitions that the brave might change. |
96 | * A zero-terminated list of I/O addresses to be probed. Some special flags.. |
97 | * Addr & 1 = Read back the address port, look for signature and reset |
98 | * the page window before probing |
99 | * Addr & 3 = Reset the page window and probe |
100 | * The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space, |
101 | * but it is possible that a Cirrus board could be plugged into the ISA |
102 | * slots. |
103 | */ |
104 | /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps |
105 | * them to system IRQ numbers. This mapping is card specific and is set to |
106 | * the configuration of the Cirrus Eval board for this chip. |
107 | */ |
108 | #if IS_ENABLED(CONFIG_CS89x0_ISA) |
109 | static unsigned int netcard_portlist[] __used __initdata = { |
110 | 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, |
111 | 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0 |
112 | }; |
113 | static unsigned int cs8900_irq_map[] = { |
114 | 10, 11, 12, 5 |
115 | }; |
116 | #endif |
117 | |
118 | #if DEBUGGING |
119 | static unsigned int net_debug = DEBUGGING; |
120 | #else |
121 | #define net_debug 0 /* gcc will remove all the debug code for us */ |
122 | #endif |
123 | |
124 | /* The number of low I/O ports used by the ethercard. */ |
125 | #define NETCARD_IO_EXTENT 16 |
126 | |
127 | /* we allow the user to override various values normally set in the EEPROM */ |
128 | #define FORCE_RJ45 0x0001 /* pick one of these three */ |
129 | #define FORCE_AUI 0x0002 |
130 | #define FORCE_BNC 0x0004 |
131 | |
132 | #define FORCE_AUTO 0x0010 /* pick one of these three */ |
133 | #define FORCE_HALF 0x0020 |
134 | #define FORCE_FULL 0x0030 |
135 | |
136 | /* Information that need to be kept for each board. */ |
137 | struct net_local { |
138 | int chip_type; /* one of: CS8900, CS8920, CS8920M */ |
139 | char chip_revision; /* revision letter of the chip ('A'...) */ |
140 | int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */ |
141 | int auto_neg_cnf; /* auto-negotiation word from EEPROM */ |
142 | int adapter_cnf; /* adapter configuration from EEPROM */ |
143 | int isa_config; /* ISA configuration from EEPROM */ |
144 | int irq_map; /* IRQ map from EEPROM */ |
145 | int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */ |
146 | int curr_rx_cfg; /* a copy of PP_RxCFG */ |
147 | int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */ |
148 | int send_underrun; /* keep track of how many underruns in a row we get */ |
149 | int force; /* force various values; see FORCE* above. */ |
150 | spinlock_t lock; |
151 | void __iomem *virt_addr;/* CS89x0 virtual address. */ |
152 | #if ALLOW_DMA |
153 | int use_dma; /* Flag: we're using dma */ |
154 | int dma; /* DMA channel */ |
155 | int dmasize; /* 16 or 64 */ |
156 | unsigned char *dma_buff; /* points to the beginning of the buffer */ |
157 | unsigned char *end_dma_buff; /* points to the end of the buffer */ |
158 | unsigned char *rx_dma_ptr; /* points to the next packet */ |
159 | #endif |
160 | }; |
161 | |
162 | /* Example routines you must write ;->. */ |
163 | #define tx_done(dev) 1 |
164 | |
165 | /* |
166 | * Permit 'cs89x0_dma=N' in the kernel boot environment |
167 | */ |
168 | #if !defined(MODULE) |
169 | #if ALLOW_DMA |
170 | static int g_cs89x0_dma; |
171 | |
172 | static int __init dma_fn(char *str) |
173 | { |
174 | g_cs89x0_dma = simple_strtol(str, NULL, 0); |
175 | return 1; |
176 | } |
177 | |
178 | __setup("cs89x0_dma=" , dma_fn); |
179 | #endif /* ALLOW_DMA */ |
180 | |
181 | static int g_cs89x0_media__force; |
182 | |
183 | static int __init media_fn(char *str) |
184 | { |
185 | if (!strcmp(str, "rj45" )) |
186 | g_cs89x0_media__force = FORCE_RJ45; |
187 | else if (!strcmp(str, "aui" )) |
188 | g_cs89x0_media__force = FORCE_AUI; |
189 | else if (!strcmp(str, "bnc" )) |
190 | g_cs89x0_media__force = FORCE_BNC; |
191 | |
192 | return 1; |
193 | } |
194 | |
195 | __setup("cs89x0_media=" , media_fn); |
196 | #endif |
197 | |
198 | static void readwords(struct net_local *lp, int portno, void *buf, int length) |
199 | { |
200 | u8 *buf8 = (u8 *)buf; |
201 | |
202 | do { |
203 | u16 tmp16; |
204 | |
205 | tmp16 = ioread16(lp->virt_addr + portno); |
206 | *buf8++ = (u8)tmp16; |
207 | *buf8++ = (u8)(tmp16 >> 8); |
208 | } while (--length); |
209 | } |
210 | |
211 | static void writewords(struct net_local *lp, int portno, void *buf, int length) |
212 | { |
213 | u8 *buf8 = (u8 *)buf; |
214 | |
215 | do { |
216 | u16 tmp16; |
217 | |
218 | tmp16 = *buf8++; |
219 | tmp16 |= (*buf8++) << 8; |
220 | iowrite16(tmp16, lp->virt_addr + portno); |
221 | } while (--length); |
222 | } |
223 | |
224 | static u16 |
225 | readreg(struct net_device *dev, u16 regno) |
226 | { |
227 | struct net_local *lp = netdev_priv(dev); |
228 | |
229 | iowrite16(regno, lp->virt_addr + ADD_PORT); |
230 | return ioread16(lp->virt_addr + DATA_PORT); |
231 | } |
232 | |
233 | static void |
234 | writereg(struct net_device *dev, u16 regno, u16 value) |
235 | { |
236 | struct net_local *lp = netdev_priv(dev); |
237 | |
238 | iowrite16(regno, lp->virt_addr + ADD_PORT); |
239 | iowrite16(value, lp->virt_addr + DATA_PORT); |
240 | } |
241 | |
242 | static int __init |
243 | wait_eeprom_ready(struct net_device *dev) |
244 | { |
245 | unsigned long timeout = jiffies; |
246 | /* check to see if the EEPROM is ready, |
247 | * a timeout is used just in case EEPROM is ready when |
248 | * SI_BUSY in the PP_SelfST is clear |
249 | */ |
250 | while (readreg(dev, PP_SelfST) & SI_BUSY) |
251 | if (time_after_eq(jiffies, timeout + 40)) |
252 | return -1; |
253 | return 0; |
254 | } |
255 | |
256 | static int __init |
257 | get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) |
258 | { |
259 | int i; |
260 | |
261 | cs89_dbg(3, info, "EEPROM data from %x for %x:" , off, len); |
262 | for (i = 0; i < len; i++) { |
263 | if (wait_eeprom_ready(dev) < 0) |
264 | return -1; |
265 | /* Now send the EEPROM read command and EEPROM location to read */ |
266 | writereg(dev, PP_EECMD, value: (off + i) | EEPROM_READ_CMD); |
267 | if (wait_eeprom_ready(dev) < 0) |
268 | return -1; |
269 | buffer[i] = readreg(dev, PP_EEData); |
270 | cs89_dbg(3, cont, " %04x" , buffer[i]); |
271 | } |
272 | cs89_dbg(3, cont, "\n" ); |
273 | return 0; |
274 | } |
275 | |
276 | static int __init |
277 | get_eeprom_cksum(int off, int len, int *buffer) |
278 | { |
279 | int i, cksum; |
280 | |
281 | cksum = 0; |
282 | for (i = 0; i < len; i++) |
283 | cksum += buffer[i]; |
284 | cksum &= 0xffff; |
285 | if (cksum == 0) |
286 | return 0; |
287 | return -1; |
288 | } |
289 | |
290 | static void |
291 | write_irq(struct net_device *dev, int chip_type, int irq) |
292 | { |
293 | int i; |
294 | |
295 | if (chip_type == CS8900) { |
296 | #if IS_ENABLED(CONFIG_CS89x0_ISA) |
297 | /* Search the mapping table for the corresponding IRQ pin. */ |
298 | for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) |
299 | if (cs8900_irq_map[i] == irq) |
300 | break; |
301 | /* Not found */ |
302 | if (i == ARRAY_SIZE(cs8900_irq_map)) |
303 | i = 3; |
304 | #else |
305 | /* INTRQ0 pin is used for interrupt generation. */ |
306 | i = 0; |
307 | #endif |
308 | writereg(dev, PP_CS8900_ISAINT, value: i); |
309 | } else { |
310 | writereg(dev, PP_CS8920_ISAINT, value: irq); |
311 | } |
312 | } |
313 | |
314 | static void |
315 | count_rx_errors(int status, struct net_device *dev) |
316 | { |
317 | dev->stats.rx_errors++; |
318 | if (status & RX_RUNT) |
319 | dev->stats.rx_length_errors++; |
320 | if (status & RX_EXTRA_DATA) |
321 | dev->stats.rx_length_errors++; |
322 | if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) |
323 | /* per str 172 */ |
324 | dev->stats.rx_crc_errors++; |
325 | if (status & RX_DRIBBLE) |
326 | dev->stats.rx_frame_errors++; |
327 | } |
328 | |
329 | /********************************* |
330 | * This page contains DMA routines |
331 | *********************************/ |
332 | |
333 | #if ALLOW_DMA |
334 | |
335 | #define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) |
336 | |
337 | static void |
338 | get_dma_channel(struct net_device *dev) |
339 | { |
340 | struct net_local *lp = netdev_priv(dev); |
341 | |
342 | if (lp->dma) { |
343 | dev->dma = lp->dma; |
344 | lp->isa_config |= ISA_RxDMA; |
345 | } else { |
346 | if ((lp->isa_config & ANY_ISA_DMA) == 0) |
347 | return; |
348 | dev->dma = lp->isa_config & DMA_NO_MASK; |
349 | if (lp->chip_type == CS8900) |
350 | dev->dma += 5; |
351 | if (dev->dma < 5 || dev->dma > 7) { |
352 | lp->isa_config &= ~ANY_ISA_DMA; |
353 | return; |
354 | } |
355 | } |
356 | } |
357 | |
358 | static void |
359 | write_dma(struct net_device *dev, int chip_type, int dma) |
360 | { |
361 | struct net_local *lp = netdev_priv(dev); |
362 | if ((lp->isa_config & ANY_ISA_DMA) == 0) |
363 | return; |
364 | if (chip_type == CS8900) |
365 | writereg(dev, PP_CS8900_ISADMA, value: dma - 5); |
366 | else |
367 | writereg(dev, PP_CS8920_ISADMA, value: dma); |
368 | } |
369 | |
370 | static void |
371 | set_dma_cfg(struct net_device *dev) |
372 | { |
373 | struct net_local *lp = netdev_priv(dev); |
374 | |
375 | if (lp->use_dma) { |
376 | if ((lp->isa_config & ANY_ISA_DMA) == 0) { |
377 | cs89_dbg(3, err, "set_dma_cfg(): no DMA\n" ); |
378 | return; |
379 | } |
380 | if (lp->isa_config & ISA_RxDMA) { |
381 | lp->curr_rx_cfg |= RX_DMA_ONLY; |
382 | cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n" ); |
383 | } else { |
384 | lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ |
385 | cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n" ); |
386 | } |
387 | } |
388 | } |
389 | |
390 | static int |
391 | dma_bufcfg(struct net_device *dev) |
392 | { |
393 | struct net_local *lp = netdev_priv(dev); |
394 | if (lp->use_dma) |
395 | return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; |
396 | else |
397 | return 0; |
398 | } |
399 | |
400 | static int |
401 | dma_busctl(struct net_device *dev) |
402 | { |
403 | int retval = 0; |
404 | struct net_local *lp = netdev_priv(dev); |
405 | if (lp->use_dma) { |
406 | if (lp->isa_config & ANY_ISA_DMA) |
407 | retval |= RESET_RX_DMA; /* Reset the DMA pointer */ |
408 | if (lp->isa_config & DMA_BURST) |
409 | retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ |
410 | if (lp->dmasize == 64) |
411 | retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ |
412 | retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ |
413 | } |
414 | return retval; |
415 | } |
416 | |
417 | static void |
418 | dma_rx(struct net_device *dev) |
419 | { |
420 | struct net_local *lp = netdev_priv(dev); |
421 | struct sk_buff *skb; |
422 | int status, length; |
423 | unsigned char *bp = lp->rx_dma_ptr; |
424 | |
425 | status = bp[0] + (bp[1] << 8); |
426 | length = bp[2] + (bp[3] << 8); |
427 | bp += 4; |
428 | |
429 | cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n" , |
430 | dev->name, (unsigned long)bp, status, length); |
431 | |
432 | if ((status & RX_OK) == 0) { |
433 | count_rx_errors(status, dev); |
434 | goto skip_this_frame; |
435 | } |
436 | |
437 | /* Malloc up new buffer. */ |
438 | skb = netdev_alloc_skb(dev, length: length + 2); |
439 | if (skb == NULL) { |
440 | dev->stats.rx_dropped++; |
441 | |
442 | /* AKPM: advance bp to the next frame */ |
443 | skip_this_frame: |
444 | bp += (length + 3) & ~3; |
445 | if (bp >= lp->end_dma_buff) |
446 | bp -= lp->dmasize * 1024; |
447 | lp->rx_dma_ptr = bp; |
448 | return; |
449 | } |
450 | skb_reserve(skb, len: 2); /* longword align L3 header */ |
451 | |
452 | if (bp + length > lp->end_dma_buff) { |
453 | int semi_cnt = lp->end_dma_buff - bp; |
454 | skb_put_data(skb, data: bp, len: semi_cnt); |
455 | skb_put_data(skb, data: lp->dma_buff, len: length - semi_cnt); |
456 | } else { |
457 | skb_put_data(skb, data: bp, len: length); |
458 | } |
459 | bp += (length + 3) & ~3; |
460 | if (bp >= lp->end_dma_buff) |
461 | bp -= lp->dmasize*1024; |
462 | lp->rx_dma_ptr = bp; |
463 | |
464 | cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n" , |
465 | dev->name, length, |
466 | ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
467 | skb->data[ETH_ALEN + ETH_ALEN + 1])); |
468 | |
469 | skb->protocol = eth_type_trans(skb, dev); |
470 | netif_rx(skb); |
471 | dev->stats.rx_packets++; |
472 | dev->stats.rx_bytes += length; |
473 | } |
474 | |
475 | static void release_dma_buff(struct net_local *lp) |
476 | { |
477 | if (lp->dma_buff) { |
478 | free_pages(addr: (unsigned long)(lp->dma_buff), |
479 | order: get_order(size: lp->dmasize * 1024)); |
480 | lp->dma_buff = NULL; |
481 | } |
482 | } |
483 | |
484 | #endif /* ALLOW_DMA */ |
485 | |
486 | static void |
487 | control_dc_dc(struct net_device *dev, int on_not_off) |
488 | { |
489 | struct net_local *lp = netdev_priv(dev); |
490 | unsigned int selfcontrol; |
491 | unsigned long timenow = jiffies; |
492 | /* control the DC to DC convertor in the SelfControl register. |
493 | * Note: This is hooked up to a general purpose pin, might not |
494 | * always be a DC to DC convertor. |
495 | */ |
496 | |
497 | selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ |
498 | if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) |
499 | selfcontrol |= HCB1; |
500 | else |
501 | selfcontrol &= ~HCB1; |
502 | writereg(dev, PP_SelfCTL, value: selfcontrol); |
503 | |
504 | /* Wait for the DC/DC converter to power up - 500ms */ |
505 | while (time_before(jiffies, timenow + HZ)) |
506 | ; |
507 | } |
508 | |
509 | /* send a test packet - return true if carrier bits are ok */ |
510 | static int |
511 | send_test_pkt(struct net_device *dev) |
512 | { |
513 | struct net_local *lp = netdev_priv(dev); |
514 | char test_packet[] = { |
515 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
516 | 0, 46, /* A 46 in network order */ |
517 | 0, 0, /* DSAP=0 & SSAP=0 fields */ |
518 | 0xf3, 0 /* Control (Test Req + P bit set) */ |
519 | }; |
520 | unsigned long timenow = jiffies; |
521 | |
522 | writereg(dev, PP_LineCTL, value: readreg(dev, PP_LineCTL) | SERIAL_TX_ON); |
523 | |
524 | memcpy(test_packet, dev->dev_addr, ETH_ALEN); |
525 | memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); |
526 | |
527 | iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); |
528 | iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); |
529 | |
530 | /* Test to see if the chip has allocated memory for the packet */ |
531 | while (time_before(jiffies, timenow + 5)) |
532 | if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) |
533 | break; |
534 | if (time_after_eq(jiffies, timenow + 5)) |
535 | return 0; /* this shouldn't happen */ |
536 | |
537 | /* Write the contents of the packet */ |
538 | writewords(lp, TX_FRAME_PORT, buf: test_packet, length: (ETH_ZLEN + 1) >> 1); |
539 | |
540 | cs89_dbg(1, debug, "Sending test packet " ); |
541 | /* wait a couple of jiffies for packet to be received */ |
542 | for (timenow = jiffies; time_before(jiffies, timenow + 3);) |
543 | ; |
544 | if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { |
545 | cs89_dbg(1, cont, "succeeded\n" ); |
546 | return 1; |
547 | } |
548 | cs89_dbg(1, cont, "failed\n" ); |
549 | return 0; |
550 | } |
551 | |
552 | #define DETECTED_NONE 0 |
553 | #define DETECTED_RJ45H 1 |
554 | #define DETECTED_RJ45F 2 |
555 | #define DETECTED_AUI 3 |
556 | #define DETECTED_BNC 4 |
557 | |
558 | static int |
559 | detect_tp(struct net_device *dev) |
560 | { |
561 | struct net_local *lp = netdev_priv(dev); |
562 | unsigned long timenow = jiffies; |
563 | int fdx; |
564 | |
565 | cs89_dbg(1, debug, "%s: Attempting TP\n" , dev->name); |
566 | |
567 | /* If connected to another full duplex capable 10-Base-T card |
568 | * the link pulses seem to be lost when the auto detect bit in |
569 | * the LineCTL is set. To overcome this the auto detect bit will |
570 | * be cleared whilst testing the 10-Base-T interface. This would |
571 | * not be necessary for the sparrow chip but is simpler to do it |
572 | * anyway. |
573 | */ |
574 | writereg(dev, PP_LineCTL, value: lp->linectl & ~AUI_ONLY); |
575 | control_dc_dc(dev, on_not_off: 0); |
576 | |
577 | /* Delay for the hardware to work out if the TP cable is present |
578 | * - 150ms |
579 | */ |
580 | for (timenow = jiffies; time_before(jiffies, timenow + 15);) |
581 | ; |
582 | if ((readreg(dev, PP_LineST) & LINK_OK) == 0) |
583 | return DETECTED_NONE; |
584 | |
585 | if (lp->chip_type == CS8900) { |
586 | switch (lp->force & 0xf0) { |
587 | #if 0 |
588 | case FORCE_AUTO: |
589 | pr_info("%s: cs8900 doesn't autonegotiate\n" , |
590 | dev->name); |
591 | return DETECTED_NONE; |
592 | #endif |
593 | /* CS8900 doesn't support AUTO, change to HALF*/ |
594 | case FORCE_AUTO: |
595 | lp->force &= ~FORCE_AUTO; |
596 | lp->force |= FORCE_HALF; |
597 | break; |
598 | case FORCE_HALF: |
599 | break; |
600 | case FORCE_FULL: |
601 | writereg(dev, PP_TestCTL, |
602 | value: readreg(dev, PP_TestCTL) | FDX_8900); |
603 | break; |
604 | } |
605 | fdx = readreg(dev, PP_TestCTL) & FDX_8900; |
606 | } else { |
607 | switch (lp->force & 0xf0) { |
608 | case FORCE_AUTO: |
609 | lp->auto_neg_cnf = AUTO_NEG_ENABLE; |
610 | break; |
611 | case FORCE_HALF: |
612 | lp->auto_neg_cnf = 0; |
613 | break; |
614 | case FORCE_FULL: |
615 | lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; |
616 | break; |
617 | } |
618 | |
619 | writereg(dev, PP_AutoNegCTL, value: lp->auto_neg_cnf & AUTO_NEG_MASK); |
620 | |
621 | if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { |
622 | pr_info("%s: negotiating duplex...\n" , dev->name); |
623 | while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { |
624 | if (time_after(jiffies, timenow + 4000)) { |
625 | pr_err("**** Full / half duplex auto-negotiation timed out ****\n" ); |
626 | break; |
627 | } |
628 | } |
629 | } |
630 | fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; |
631 | } |
632 | if (fdx) |
633 | return DETECTED_RJ45F; |
634 | else |
635 | return DETECTED_RJ45H; |
636 | } |
637 | |
638 | static int |
639 | detect_bnc(struct net_device *dev) |
640 | { |
641 | struct net_local *lp = netdev_priv(dev); |
642 | |
643 | cs89_dbg(1, debug, "%s: Attempting BNC\n" , dev->name); |
644 | control_dc_dc(dev, on_not_off: 1); |
645 | |
646 | writereg(dev, PP_LineCTL, value: (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); |
647 | |
648 | if (send_test_pkt(dev)) |
649 | return DETECTED_BNC; |
650 | else |
651 | return DETECTED_NONE; |
652 | } |
653 | |
654 | static int |
655 | detect_aui(struct net_device *dev) |
656 | { |
657 | struct net_local *lp = netdev_priv(dev); |
658 | |
659 | cs89_dbg(1, debug, "%s: Attempting AUI\n" , dev->name); |
660 | control_dc_dc(dev, on_not_off: 0); |
661 | |
662 | writereg(dev, PP_LineCTL, value: (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); |
663 | |
664 | if (send_test_pkt(dev)) |
665 | return DETECTED_AUI; |
666 | else |
667 | return DETECTED_NONE; |
668 | } |
669 | |
670 | /* We have a good packet(s), get it/them out of the buffers. */ |
671 | static void |
672 | net_rx(struct net_device *dev) |
673 | { |
674 | struct net_local *lp = netdev_priv(dev); |
675 | struct sk_buff *skb; |
676 | int status, length; |
677 | |
678 | status = ioread16(lp->virt_addr + RX_FRAME_PORT); |
679 | length = ioread16(lp->virt_addr + RX_FRAME_PORT); |
680 | |
681 | if ((status & RX_OK) == 0) { |
682 | count_rx_errors(status, dev); |
683 | return; |
684 | } |
685 | |
686 | /* Malloc up new buffer. */ |
687 | skb = netdev_alloc_skb(dev, length: length + 2); |
688 | if (skb == NULL) { |
689 | dev->stats.rx_dropped++; |
690 | return; |
691 | } |
692 | skb_reserve(skb, len: 2); /* longword align L3 header */ |
693 | |
694 | readwords(lp, RX_FRAME_PORT, buf: skb_put(skb, len: length), length: length >> 1); |
695 | if (length & 1) |
696 | skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT); |
697 | |
698 | cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n" , |
699 | dev->name, length, |
700 | (skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
701 | skb->data[ETH_ALEN + ETH_ALEN + 1]); |
702 | |
703 | skb->protocol = eth_type_trans(skb, dev); |
704 | netif_rx(skb); |
705 | dev->stats.rx_packets++; |
706 | dev->stats.rx_bytes += length; |
707 | } |
708 | |
709 | /* The typical workload of the driver: |
710 | * Handle the network interface interrupts. |
711 | */ |
712 | |
713 | static irqreturn_t net_interrupt(int irq, void *dev_id) |
714 | { |
715 | struct net_device *dev = dev_id; |
716 | struct net_local *lp; |
717 | int status; |
718 | int handled = 0; |
719 | |
720 | lp = netdev_priv(dev); |
721 | |
722 | /* we MUST read all the events out of the ISQ, otherwise we'll never |
723 | * get interrupted again. As a consequence, we can't have any limit |
724 | * on the number of times we loop in the interrupt handler. The |
725 | * hardware guarantees that eventually we'll run out of events. Of |
726 | * course, if you're on a slow machine, and packets are arriving |
727 | * faster than you can read them off, you're screwed. Hasta la |
728 | * vista, baby! |
729 | */ |
730 | while ((status = ioread16(lp->virt_addr + ISQ_PORT))) { |
731 | cs89_dbg(4, debug, "%s: event=%04x\n" , dev->name, status); |
732 | handled = 1; |
733 | switch (status & ISQ_EVENT_MASK) { |
734 | case ISQ_RECEIVER_EVENT: |
735 | /* Got a packet(s). */ |
736 | net_rx(dev); |
737 | break; |
738 | case ISQ_TRANSMITTER_EVENT: |
739 | dev->stats.tx_packets++; |
740 | netif_wake_queue(dev); /* Inform upper layers. */ |
741 | if ((status & (TX_OK | |
742 | TX_LOST_CRS | |
743 | TX_SQE_ERROR | |
744 | TX_LATE_COL | |
745 | TX_16_COL)) != TX_OK) { |
746 | if ((status & TX_OK) == 0) |
747 | dev->stats.tx_errors++; |
748 | if (status & TX_LOST_CRS) |
749 | dev->stats.tx_carrier_errors++; |
750 | if (status & TX_SQE_ERROR) |
751 | dev->stats.tx_heartbeat_errors++; |
752 | if (status & TX_LATE_COL) |
753 | dev->stats.tx_window_errors++; |
754 | if (status & TX_16_COL) |
755 | dev->stats.tx_aborted_errors++; |
756 | } |
757 | break; |
758 | case ISQ_BUFFER_EVENT: |
759 | if (status & READY_FOR_TX) { |
760 | /* we tried to transmit a packet earlier, |
761 | * but inexplicably ran out of buffers. |
762 | * That shouldn't happen since we only ever |
763 | * load one packet. Shrug. Do the right |
764 | * thing anyway. |
765 | */ |
766 | netif_wake_queue(dev); /* Inform upper layers. */ |
767 | } |
768 | if (status & TX_UNDERRUN) { |
769 | cs89_dbg(0, err, "%s: transmit underrun\n" , |
770 | dev->name); |
771 | lp->send_underrun++; |
772 | if (lp->send_underrun == 3) |
773 | lp->send_cmd = TX_AFTER_381; |
774 | else if (lp->send_underrun == 6) |
775 | lp->send_cmd = TX_AFTER_ALL; |
776 | /* transmit cycle is done, although |
777 | * frame wasn't transmitted - this |
778 | * avoids having to wait for the upper |
779 | * layers to timeout on us, in the |
780 | * event of a tx underrun |
781 | */ |
782 | netif_wake_queue(dev); /* Inform upper layers. */ |
783 | } |
784 | #if ALLOW_DMA |
785 | if (lp->use_dma && (status & RX_DMA)) { |
786 | int count = readreg(dev, PP_DmaFrameCnt); |
787 | while (count) { |
788 | cs89_dbg(5, debug, |
789 | "%s: receiving %d DMA frames\n" , |
790 | dev->name, count); |
791 | if (count > 1) |
792 | cs89_dbg(2, debug, |
793 | "%s: receiving %d DMA frames\n" , |
794 | dev->name, count); |
795 | dma_rx(dev); |
796 | if (--count == 0) |
797 | count = readreg(dev, PP_DmaFrameCnt); |
798 | if (count > 0) |
799 | cs89_dbg(2, debug, |
800 | "%s: continuing with %d DMA frames\n" , |
801 | dev->name, count); |
802 | } |
803 | } |
804 | #endif |
805 | break; |
806 | case ISQ_RX_MISS_EVENT: |
807 | dev->stats.rx_missed_errors += (status >> 6); |
808 | break; |
809 | case ISQ_TX_COL_EVENT: |
810 | dev->stats.collisions += (status >> 6); |
811 | break; |
812 | } |
813 | } |
814 | return IRQ_RETVAL(handled); |
815 | } |
816 | |
817 | /* Open/initialize the board. This is called (in the current kernel) |
818 | sometime after booting when the 'ifconfig' program is run. |
819 | |
820 | This routine should set everything up anew at each open, even |
821 | registers that "should" only need to be set once at boot, so that |
822 | there is non-reboot way to recover if something goes wrong. |
823 | */ |
824 | |
825 | /* AKPM: do we need to do any locking here? */ |
826 | |
827 | static int |
828 | net_open(struct net_device *dev) |
829 | { |
830 | struct net_local *lp = netdev_priv(dev); |
831 | int result = 0; |
832 | int i; |
833 | int ret; |
834 | |
835 | if (dev->irq < 2) { |
836 | /* Allow interrupts to be generated by the chip */ |
837 | /* Cirrus' release had this: */ |
838 | #if 0 |
839 | writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); |
840 | #endif |
841 | /* And 2.3.47 had this: */ |
842 | writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); |
843 | |
844 | for (i = 2; i < CS8920_NO_INTS; i++) { |
845 | if ((1 << i) & lp->irq_map) { |
846 | if (request_irq(irq: i, handler: net_interrupt, flags: 0, name: dev->name, |
847 | dev) == 0) { |
848 | dev->irq = i; |
849 | write_irq(dev, chip_type: lp->chip_type, irq: i); |
850 | /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ |
851 | break; |
852 | } |
853 | } |
854 | } |
855 | |
856 | if (i >= CS8920_NO_INTS) { |
857 | writereg(dev, PP_BusCTL, value: 0); /* disable interrupts. */ |
858 | pr_err("can't get an interrupt\n" ); |
859 | ret = -EAGAIN; |
860 | goto bad_out; |
861 | } |
862 | } else { |
863 | #if IS_ENABLED(CONFIG_CS89x0_ISA) |
864 | if (((1 << dev->irq) & lp->irq_map) == 0) { |
865 | pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n" , |
866 | dev->name, dev->irq, lp->irq_map); |
867 | ret = -EAGAIN; |
868 | goto bad_out; |
869 | } |
870 | #endif |
871 | /* FIXME: Cirrus' release had this: */ |
872 | writereg(dev, PP_BusCTL, value: readreg(dev, PP_BusCTL)|ENABLE_IRQ); |
873 | /* And 2.3.47 had this: */ |
874 | #if 0 |
875 | writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); |
876 | #endif |
877 | write_irq(dev, chip_type: lp->chip_type, irq: dev->irq); |
878 | ret = request_irq(irq: dev->irq, handler: net_interrupt, flags: 0, name: dev->name, dev); |
879 | if (ret) { |
880 | pr_err("request_irq(%d) failed\n" , dev->irq); |
881 | goto bad_out; |
882 | } |
883 | } |
884 | |
885 | #if ALLOW_DMA |
886 | if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) { |
887 | unsigned long flags; |
888 | lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, |
889 | get_order(lp->dmasize * 1024)); |
890 | if (!lp->dma_buff) { |
891 | pr_err("%s: cannot get %dK memory for DMA\n" , |
892 | dev->name, lp->dmasize); |
893 | goto release_irq; |
894 | } |
895 | cs89_dbg(1, debug, "%s: dma %lx %lx\n" , |
896 | dev->name, |
897 | (unsigned long)lp->dma_buff, |
898 | (unsigned long)isa_virt_to_bus(lp->dma_buff)); |
899 | if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS || |
900 | !dma_page_eq(lp->dma_buff, |
901 | lp->dma_buff + lp->dmasize * 1024 - 1)) { |
902 | pr_err("%s: not usable as DMA buffer\n" , dev->name); |
903 | goto release_irq; |
904 | } |
905 | memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ |
906 | if (request_dma(dmanr: dev->dma, device_id: dev->name)) { |
907 | pr_err("%s: cannot get dma channel %d\n" , |
908 | dev->name, dev->dma); |
909 | goto release_irq; |
910 | } |
911 | write_dma(dev, chip_type: lp->chip_type, dma: dev->dma); |
912 | lp->rx_dma_ptr = lp->dma_buff; |
913 | lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024; |
914 | spin_lock_irqsave(&lp->lock, flags); |
915 | disable_dma(dmanr: dev->dma); |
916 | clear_dma_ff(dmanr: dev->dma); |
917 | set_dma_mode(dmanr: dev->dma, DMA_RX_MODE); /* auto_init as well */ |
918 | set_dma_addr(dmanr: dev->dma, a: isa_virt_to_bus(address: lp->dma_buff)); |
919 | set_dma_count(dmanr: dev->dma, count: lp->dmasize * 1024); |
920 | enable_dma(dmanr: dev->dma); |
921 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
922 | } |
923 | #endif /* ALLOW_DMA */ |
924 | |
925 | /* set the Ethernet address */ |
926 | for (i = 0; i < ETH_ALEN / 2; i++) |
927 | writereg(dev, PP_IA + i * 2, |
928 | value: (dev->dev_addr[i * 2] | |
929 | (dev->dev_addr[i * 2 + 1] << 8))); |
930 | |
931 | /* while we're testing the interface, leave interrupts disabled */ |
932 | writereg(dev, PP_BusCTL, MEMORY_ON); |
933 | |
934 | /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ |
935 | if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && |
936 | (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) |
937 | lp->linectl = LOW_RX_SQUELCH; |
938 | else |
939 | lp->linectl = 0; |
940 | |
941 | /* check to make sure that they have the "right" hardware available */ |
942 | switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { |
943 | case A_CNF_MEDIA_10B_T: |
944 | result = lp->adapter_cnf & A_CNF_10B_T; |
945 | break; |
946 | case A_CNF_MEDIA_AUI: |
947 | result = lp->adapter_cnf & A_CNF_AUI; |
948 | break; |
949 | case A_CNF_MEDIA_10B_2: |
950 | result = lp->adapter_cnf & A_CNF_10B_2; |
951 | break; |
952 | default: |
953 | result = lp->adapter_cnf & (A_CNF_10B_T | |
954 | A_CNF_AUI | |
955 | A_CNF_10B_2); |
956 | } |
957 | if (!result) { |
958 | pr_err("%s: EEPROM is configured for unavailable media\n" , |
959 | dev->name); |
960 | release_dma: |
961 | #if ALLOW_DMA |
962 | free_dma(dmanr: dev->dma); |
963 | release_irq: |
964 | release_dma_buff(lp); |
965 | #endif |
966 | writereg(dev, PP_LineCTL, |
967 | value: readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); |
968 | free_irq(dev->irq, dev); |
969 | ret = -EAGAIN; |
970 | goto bad_out; |
971 | } |
972 | |
973 | /* set the hardware to the configured choice */ |
974 | switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { |
975 | case A_CNF_MEDIA_10B_T: |
976 | result = detect_tp(dev); |
977 | if (result == DETECTED_NONE) { |
978 | pr_warn("%s: 10Base-T (RJ-45) has no cable\n" , |
979 | dev->name); |
980 | if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
981 | result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ |
982 | } |
983 | break; |
984 | case A_CNF_MEDIA_AUI: |
985 | result = detect_aui(dev); |
986 | if (result == DETECTED_NONE) { |
987 | pr_warn("%s: 10Base-5 (AUI) has no cable\n" , dev->name); |
988 | if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
989 | result = DETECTED_AUI; /* Yes! I don't care if I see a carrier */ |
990 | } |
991 | break; |
992 | case A_CNF_MEDIA_10B_2: |
993 | result = detect_bnc(dev); |
994 | if (result == DETECTED_NONE) { |
995 | pr_warn("%s: 10Base-2 (BNC) has no cable\n" , dev->name); |
996 | if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ |
997 | result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ |
998 | } |
999 | break; |
1000 | case A_CNF_MEDIA_AUTO: |
1001 | writereg(dev, PP_LineCTL, value: lp->linectl | AUTO_AUI_10BASET); |
1002 | if (lp->adapter_cnf & A_CNF_10B_T) { |
1003 | result = detect_tp(dev); |
1004 | if (result != DETECTED_NONE) |
1005 | break; |
1006 | } |
1007 | if (lp->adapter_cnf & A_CNF_AUI) { |
1008 | result = detect_aui(dev); |
1009 | if (result != DETECTED_NONE) |
1010 | break; |
1011 | } |
1012 | if (lp->adapter_cnf & A_CNF_10B_2) { |
1013 | result = detect_bnc(dev); |
1014 | if (result != DETECTED_NONE) |
1015 | break; |
1016 | } |
1017 | pr_err("%s: no media detected\n" , dev->name); |
1018 | goto release_dma; |
1019 | } |
1020 | switch (result) { |
1021 | case DETECTED_NONE: |
1022 | pr_err("%s: no network cable attached to configured media\n" , |
1023 | dev->name); |
1024 | goto release_dma; |
1025 | case DETECTED_RJ45H: |
1026 | pr_info("%s: using half-duplex 10Base-T (RJ-45)\n" , dev->name); |
1027 | break; |
1028 | case DETECTED_RJ45F: |
1029 | pr_info("%s: using full-duplex 10Base-T (RJ-45)\n" , dev->name); |
1030 | break; |
1031 | case DETECTED_AUI: |
1032 | pr_info("%s: using 10Base-5 (AUI)\n" , dev->name); |
1033 | break; |
1034 | case DETECTED_BNC: |
1035 | pr_info("%s: using 10Base-2 (BNC)\n" , dev->name); |
1036 | break; |
1037 | } |
1038 | |
1039 | /* Turn on both receive and transmit operations */ |
1040 | writereg(dev, PP_LineCTL, |
1041 | value: readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); |
1042 | |
1043 | /* Receive only error free packets addressed to this card */ |
1044 | lp->rx_mode = 0; |
1045 | writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); |
1046 | |
1047 | lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; |
1048 | |
1049 | if (lp->isa_config & STREAM_TRANSFER) |
1050 | lp->curr_rx_cfg |= RX_STREAM_ENBL; |
1051 | #if ALLOW_DMA |
1052 | set_dma_cfg(dev); |
1053 | #endif |
1054 | writereg(dev, PP_RxCFG, value: lp->curr_rx_cfg); |
1055 | |
1056 | writereg(dev, PP_TxCFG, value: (TX_LOST_CRS_ENBL | |
1057 | TX_SQE_ERROR_ENBL | |
1058 | TX_OK_ENBL | |
1059 | TX_LATE_COL_ENBL | |
1060 | TX_JBR_ENBL | |
1061 | TX_ANY_COL_ENBL | |
1062 | TX_16_COL_ENBL)); |
1063 | |
1064 | writereg(dev, PP_BufCFG, value: (READY_FOR_TX_ENBL | |
1065 | RX_MISS_COUNT_OVRFLOW_ENBL | |
1066 | #if ALLOW_DMA |
1067 | dma_bufcfg(dev) | |
1068 | #endif |
1069 | TX_COL_COUNT_OVRFLOW_ENBL | |
1070 | TX_UNDERRUN_ENBL)); |
1071 | |
1072 | /* now that we've got our act together, enable everything */ |
1073 | writereg(dev, PP_BusCTL, value: (ENABLE_IRQ |
1074 | | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */ |
1075 | #if ALLOW_DMA |
1076 | | dma_busctl(dev) |
1077 | #endif |
1078 | )); |
1079 | netif_start_queue(dev); |
1080 | cs89_dbg(1, debug, "net_open() succeeded\n" ); |
1081 | return 0; |
1082 | bad_out: |
1083 | return ret; |
1084 | } |
1085 | |
1086 | /* The inverse routine to net_open(). */ |
1087 | static int |
1088 | net_close(struct net_device *dev) |
1089 | { |
1090 | #if ALLOW_DMA |
1091 | struct net_local *lp = netdev_priv(dev); |
1092 | #endif |
1093 | |
1094 | netif_stop_queue(dev); |
1095 | |
1096 | writereg(dev, PP_RxCFG, value: 0); |
1097 | writereg(dev, PP_TxCFG, value: 0); |
1098 | writereg(dev, PP_BufCFG, value: 0); |
1099 | writereg(dev, PP_BusCTL, value: 0); |
1100 | |
1101 | free_irq(dev->irq, dev); |
1102 | |
1103 | #if ALLOW_DMA |
1104 | if (lp->use_dma && lp->dma) { |
1105 | free_dma(dmanr: dev->dma); |
1106 | release_dma_buff(lp); |
1107 | } |
1108 | #endif |
1109 | |
1110 | /* Update the statistics here. */ |
1111 | return 0; |
1112 | } |
1113 | |
1114 | /* Get the current statistics. |
1115 | * This may be called with the card open or closed. |
1116 | */ |
1117 | static struct net_device_stats * |
1118 | net_get_stats(struct net_device *dev) |
1119 | { |
1120 | struct net_local *lp = netdev_priv(dev); |
1121 | unsigned long flags; |
1122 | |
1123 | spin_lock_irqsave(&lp->lock, flags); |
1124 | /* Update the statistics from the device registers. */ |
1125 | dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); |
1126 | dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6); |
1127 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
1128 | |
1129 | return &dev->stats; |
1130 | } |
1131 | |
1132 | static void net_timeout(struct net_device *dev, unsigned int txqueue) |
1133 | { |
1134 | /* If we get here, some higher level has decided we are broken. |
1135 | There should really be a "kick me" function call instead. */ |
1136 | cs89_dbg(0, err, "%s: transmit timed out, %s?\n" , |
1137 | dev->name, |
1138 | tx_done(dev) ? "IRQ conflict" : "network cable problem" ); |
1139 | /* Try to restart the adaptor. */ |
1140 | netif_wake_queue(dev); |
1141 | } |
1142 | |
1143 | static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev) |
1144 | { |
1145 | struct net_local *lp = netdev_priv(dev); |
1146 | unsigned long flags; |
1147 | |
1148 | cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n" , |
1149 | dev->name, skb->len, |
1150 | ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | |
1151 | skb->data[ETH_ALEN + ETH_ALEN + 1])); |
1152 | |
1153 | /* keep the upload from being interrupted, since we |
1154 | * ask the chip to start transmitting before the |
1155 | * whole packet has been completely uploaded. |
1156 | */ |
1157 | |
1158 | spin_lock_irqsave(&lp->lock, flags); |
1159 | netif_stop_queue(dev); |
1160 | |
1161 | /* initiate a transmit sequence */ |
1162 | iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT); |
1163 | iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT); |
1164 | |
1165 | /* Test to see if the chip has allocated memory for the packet */ |
1166 | if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { |
1167 | /* Gasp! It hasn't. But that shouldn't happen since |
1168 | * we're waiting for TxOk, so return 1 and requeue this packet. |
1169 | */ |
1170 | |
1171 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
1172 | cs89_dbg(0, err, "Tx buffer not free!\n" ); |
1173 | return NETDEV_TX_BUSY; |
1174 | } |
1175 | /* Write the contents of the packet */ |
1176 | writewords(lp, TX_FRAME_PORT, buf: skb->data, length: (skb->len + 1) >> 1); |
1177 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
1178 | dev->stats.tx_bytes += skb->len; |
1179 | dev_consume_skb_any(skb); |
1180 | |
1181 | /* We DO NOT call netif_wake_queue() here. |
1182 | * We also DO NOT call netif_start_queue(). |
1183 | * |
1184 | * Either of these would cause another bottom half run through |
1185 | * net_send_packet() before this packet has fully gone out. |
1186 | * That causes us to hit the "Gasp!" above and the send is rescheduled. |
1187 | * it runs like a dog. We just return and wait for the Tx completion |
1188 | * interrupt handler to restart the netdevice layer |
1189 | */ |
1190 | |
1191 | return NETDEV_TX_OK; |
1192 | } |
1193 | |
1194 | static void set_multicast_list(struct net_device *dev) |
1195 | { |
1196 | struct net_local *lp = netdev_priv(dev); |
1197 | unsigned long flags; |
1198 | u16 cfg; |
1199 | |
1200 | spin_lock_irqsave(&lp->lock, flags); |
1201 | if (dev->flags & IFF_PROMISC) |
1202 | lp->rx_mode = RX_ALL_ACCEPT; |
1203 | else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) |
1204 | /* The multicast-accept list is initialized to accept-all, |
1205 | * and we rely on higher-level filtering for now. |
1206 | */ |
1207 | lp->rx_mode = RX_MULTCAST_ACCEPT; |
1208 | else |
1209 | lp->rx_mode = 0; |
1210 | |
1211 | writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); |
1212 | |
1213 | /* in promiscuous mode, we accept errored packets, |
1214 | * so we have to enable interrupts on them also |
1215 | */ |
1216 | cfg = lp->curr_rx_cfg; |
1217 | if (lp->rx_mode == RX_ALL_ACCEPT) |
1218 | cfg |= RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL; |
1219 | writereg(dev, PP_RxCFG, value: cfg); |
1220 | spin_unlock_irqrestore(lock: &lp->lock, flags); |
1221 | } |
1222 | |
1223 | static int set_mac_address(struct net_device *dev, void *p) |
1224 | { |
1225 | int i; |
1226 | struct sockaddr *addr = p; |
1227 | |
1228 | if (netif_running(dev)) |
1229 | return -EBUSY; |
1230 | |
1231 | eth_hw_addr_set(dev, addr: addr->sa_data); |
1232 | |
1233 | cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n" , |
1234 | dev->name, dev->dev_addr); |
1235 | |
1236 | /* set the Ethernet address */ |
1237 | for (i = 0; i < ETH_ALEN / 2; i++) |
1238 | writereg(dev, PP_IA + i * 2, |
1239 | value: (dev->dev_addr[i * 2] | |
1240 | (dev->dev_addr[i * 2 + 1] << 8))); |
1241 | |
1242 | return 0; |
1243 | } |
1244 | |
1245 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1246 | /* |
1247 | * Polling receive - used by netconsole and other diagnostic tools |
1248 | * to allow network i/o with interrupts disabled. |
1249 | */ |
1250 | static void net_poll_controller(struct net_device *dev) |
1251 | { |
1252 | disable_irq(irq: dev->irq); |
1253 | net_interrupt(irq: dev->irq, dev_id: dev); |
1254 | enable_irq(irq: dev->irq); |
1255 | } |
1256 | #endif |
1257 | |
1258 | static const struct net_device_ops net_ops = { |
1259 | .ndo_open = net_open, |
1260 | .ndo_stop = net_close, |
1261 | .ndo_tx_timeout = net_timeout, |
1262 | .ndo_start_xmit = net_send_packet, |
1263 | .ndo_get_stats = net_get_stats, |
1264 | .ndo_set_rx_mode = set_multicast_list, |
1265 | .ndo_set_mac_address = set_mac_address, |
1266 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1267 | .ndo_poll_controller = net_poll_controller, |
1268 | #endif |
1269 | .ndo_validate_addr = eth_validate_addr, |
1270 | }; |
1271 | |
1272 | static void __init reset_chip(struct net_device *dev) |
1273 | { |
1274 | #if !defined(CONFIG_MACH_MX31ADS) |
1275 | struct net_local *lp = netdev_priv(dev); |
1276 | unsigned long reset_start_time; |
1277 | |
1278 | writereg(dev, PP_SelfCTL, value: readreg(dev, PP_SelfCTL) | POWER_ON_RESET); |
1279 | |
1280 | /* wait 30 ms */ |
1281 | msleep(msecs: 30); |
1282 | |
1283 | if (lp->chip_type != CS8900) { |
1284 | /* Hardware problem requires PNP registers to be reconfigured after a reset */ |
1285 | iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT); |
1286 | iowrite8(dev->irq, lp->virt_addr + DATA_PORT); |
1287 | iowrite8(0, lp->virt_addr + DATA_PORT + 1); |
1288 | |
1289 | iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT); |
1290 | iowrite8((dev->mem_start >> 16) & 0xff, |
1291 | lp->virt_addr + DATA_PORT); |
1292 | iowrite8((dev->mem_start >> 8) & 0xff, |
1293 | lp->virt_addr + DATA_PORT + 1); |
1294 | } |
1295 | |
1296 | /* Wait until the chip is reset */ |
1297 | reset_start_time = jiffies; |
1298 | while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 && |
1299 | time_before(jiffies, reset_start_time + 2)) |
1300 | ; |
1301 | #endif /* !CONFIG_MACH_MX31ADS */ |
1302 | } |
1303 | |
1304 | /* This is the real probe routine. |
1305 | * Linux has a history of friendly device probes on the ISA bus. |
1306 | * A good device probes avoids doing writes, and |
1307 | * verifies that the correct device exists and functions. |
1308 | * Return 0 on success. |
1309 | */ |
1310 | static int __init |
1311 | cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular) |
1312 | { |
1313 | struct net_local *lp = netdev_priv(dev); |
1314 | int i; |
1315 | int tmp; |
1316 | unsigned rev_type = 0; |
1317 | int eeprom_buff[CHKSUM_LEN]; |
1318 | u8 addr[ETH_ALEN]; |
1319 | int retval; |
1320 | |
1321 | /* Initialize the device structure. */ |
1322 | if (!modular) { |
1323 | memset(lp, 0, sizeof(*lp)); |
1324 | spin_lock_init(&lp->lock); |
1325 | #ifndef MODULE |
1326 | #if ALLOW_DMA |
1327 | if (g_cs89x0_dma) { |
1328 | lp->use_dma = 1; |
1329 | lp->dma = g_cs89x0_dma; |
1330 | lp->dmasize = 16; /* Could make this an option... */ |
1331 | } |
1332 | #endif |
1333 | lp->force = g_cs89x0_media__force; |
1334 | #endif |
1335 | } |
1336 | |
1337 | pr_debug("PP_addr at %p[%x]: 0x%x\n" , |
1338 | ioaddr, ADD_PORT, ioread16(ioaddr + ADD_PORT)); |
1339 | iowrite16(PP_ChipID, ioaddr + ADD_PORT); |
1340 | |
1341 | tmp = ioread16(ioaddr + DATA_PORT); |
1342 | if (tmp != CHIP_EISA_ID_SIG) { |
1343 | pr_debug("%s: incorrect signature at %p[%x]: 0x%x!=" |
1344 | CHIP_EISA_ID_SIG_STR "\n" , |
1345 | dev->name, ioaddr, DATA_PORT, tmp); |
1346 | retval = -ENODEV; |
1347 | goto out1; |
1348 | } |
1349 | |
1350 | lp->virt_addr = ioaddr; |
1351 | |
1352 | /* get the chip type */ |
1353 | rev_type = readreg(dev, PRODUCT_ID_ADD); |
1354 | lp->chip_type = rev_type & ~REVISON_BITS; |
1355 | lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; |
1356 | |
1357 | /* Check the chip type and revision in order to set the correct |
1358 | * send command. CS8920 revision C and CS8900 revision F can use |
1359 | * the faster send. |
1360 | */ |
1361 | lp->send_cmd = TX_AFTER_381; |
1362 | if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') |
1363 | lp->send_cmd = TX_NOW; |
1364 | if (lp->chip_type != CS8900 && lp->chip_revision >= 'C') |
1365 | lp->send_cmd = TX_NOW; |
1366 | |
1367 | pr_info_once("%s\n" , version); |
1368 | |
1369 | pr_info("%s: cs89%c0%s rev %c found at %p " , |
1370 | dev->name, |
1371 | lp->chip_type == CS8900 ? '0' : '2', |
1372 | lp->chip_type == CS8920M ? "M" : "" , |
1373 | lp->chip_revision, |
1374 | lp->virt_addr); |
1375 | |
1376 | reset_chip(dev); |
1377 | |
1378 | /* Here we read the current configuration of the chip. |
1379 | * If there is no Extended EEPROM then the idea is to not disturb |
1380 | * the chip configuration, it should have been correctly setup by |
1381 | * automatic EEPROM read on reset. So, if the chip says it read |
1382 | * the EEPROM the driver will always do *something* instead of |
1383 | * complain that adapter_cnf is 0. |
1384 | */ |
1385 | |
1386 | if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) == |
1387 | (EEPROM_OK | EEPROM_PRESENT)) { |
1388 | /* Load the MAC. */ |
1389 | for (i = 0; i < ETH_ALEN / 2; i++) { |
1390 | unsigned int Addr; |
1391 | Addr = readreg(dev, PP_IA + i * 2); |
1392 | addr[i * 2] = Addr & 0xFF; |
1393 | addr[i * 2 + 1] = Addr >> 8; |
1394 | } |
1395 | eth_hw_addr_set(dev, addr); |
1396 | |
1397 | /* Load the Adapter Configuration. |
1398 | * Note: Barring any more specific information from some |
1399 | * other source (ie EEPROM+Schematics), we would not know |
1400 | * how to operate a 10Base2 interface on the AUI port. |
1401 | * However, since we do read the status of HCB1 and use |
1402 | * settings that always result in calls to control_dc_dc(dev,0) |
1403 | * a BNC interface should work if the enable pin |
1404 | * (dc/dc converter) is on HCB1. |
1405 | * It will be called AUI however. |
1406 | */ |
1407 | |
1408 | lp->adapter_cnf = 0; |
1409 | i = readreg(dev, PP_LineCTL); |
1410 | /* Preserve the setting of the HCB1 pin. */ |
1411 | if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL)) |
1412 | lp->adapter_cnf |= A_CNF_DC_DC_POLARITY; |
1413 | /* Save the sqelch bit */ |
1414 | if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH) |
1415 | lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH; |
1416 | /* Check if the card is in 10Base-t only mode */ |
1417 | if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0) |
1418 | lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T; |
1419 | /* Check if the card is in AUI only mode */ |
1420 | if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY) |
1421 | lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI; |
1422 | /* Check if the card is in Auto mode. */ |
1423 | if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET) |
1424 | lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T | |
1425 | A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO; |
1426 | |
1427 | cs89_dbg(1, info, "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n" , |
1428 | dev->name, i, lp->adapter_cnf); |
1429 | |
1430 | /* IRQ. Other chips already probe, see below. */ |
1431 | if (lp->chip_type == CS8900) |
1432 | lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK; |
1433 | |
1434 | pr_cont("[Cirrus EEPROM] " ); |
1435 | } |
1436 | |
1437 | pr_cont("\n" ); |
1438 | |
1439 | /* First check to see if an EEPROM is attached. */ |
1440 | |
1441 | if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0) |
1442 | pr_warn("No EEPROM, relying on command line....\n" ); |
1443 | else if (get_eeprom_data(dev, START_EEPROM_DATA, CHKSUM_LEN, buffer: eeprom_buff) < 0) { |
1444 | pr_warn("EEPROM read failed, relying on command line\n" ); |
1445 | } else if (get_eeprom_cksum(START_EEPROM_DATA, CHKSUM_LEN, buffer: eeprom_buff) < 0) { |
1446 | /* Check if the chip was able to read its own configuration starting |
1447 | at 0 in the EEPROM*/ |
1448 | if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) != |
1449 | (EEPROM_OK | EEPROM_PRESENT)) |
1450 | pr_warn("Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n" ); |
1451 | |
1452 | } else { |
1453 | /* This reads an extended EEPROM that is not documented |
1454 | * in the CS8900 datasheet. |
1455 | */ |
1456 | |
1457 | /* get transmission control word but keep the autonegotiation bits */ |
1458 | if (!lp->auto_neg_cnf) |
1459 | lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET / 2]; |
1460 | /* Store adapter configuration */ |
1461 | if (!lp->adapter_cnf) |
1462 | lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET / 2]; |
1463 | /* Store ISA configuration */ |
1464 | lp->isa_config = eeprom_buff[ISA_CNF_OFFSET / 2]; |
1465 | dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET / 2] << 8; |
1466 | |
1467 | /* eeprom_buff has 32-bit ints, so we can't just memcpy it */ |
1468 | /* store the initial memory base address */ |
1469 | for (i = 0; i < ETH_ALEN / 2; i++) { |
1470 | addr[i * 2] = eeprom_buff[i]; |
1471 | addr[i * 2 + 1] = eeprom_buff[i] >> 8; |
1472 | } |
1473 | eth_hw_addr_set(dev, addr); |
1474 | cs89_dbg(1, debug, "%s: new adapter_cnf: 0x%x\n" , |
1475 | dev->name, lp->adapter_cnf); |
1476 | } |
1477 | |
1478 | /* allow them to force multiple transceivers. If they force multiple, autosense */ |
1479 | { |
1480 | int count = 0; |
1481 | if (lp->force & FORCE_RJ45) { |
1482 | lp->adapter_cnf |= A_CNF_10B_T; |
1483 | count++; |
1484 | } |
1485 | if (lp->force & FORCE_AUI) { |
1486 | lp->adapter_cnf |= A_CNF_AUI; |
1487 | count++; |
1488 | } |
1489 | if (lp->force & FORCE_BNC) { |
1490 | lp->adapter_cnf |= A_CNF_10B_2; |
1491 | count++; |
1492 | } |
1493 | if (count > 1) |
1494 | lp->adapter_cnf |= A_CNF_MEDIA_AUTO; |
1495 | else if (lp->force & FORCE_RJ45) |
1496 | lp->adapter_cnf |= A_CNF_MEDIA_10B_T; |
1497 | else if (lp->force & FORCE_AUI) |
1498 | lp->adapter_cnf |= A_CNF_MEDIA_AUI; |
1499 | else if (lp->force & FORCE_BNC) |
1500 | lp->adapter_cnf |= A_CNF_MEDIA_10B_2; |
1501 | } |
1502 | |
1503 | cs89_dbg(1, debug, "%s: after force 0x%x, adapter_cnf=0x%x\n" , |
1504 | dev->name, lp->force, lp->adapter_cnf); |
1505 | |
1506 | /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */ |
1507 | |
1508 | /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */ |
1509 | |
1510 | /* FIXME: we don't set the Ethernet address on the command line. Use |
1511 | * ifconfig IFACE hw ether AABBCCDDEEFF |
1512 | */ |
1513 | |
1514 | pr_info("media %s%s%s" , |
1515 | (lp->adapter_cnf & A_CNF_10B_T) ? "RJ-45," : "" , |
1516 | (lp->adapter_cnf & A_CNF_AUI) ? "AUI," : "" , |
1517 | (lp->adapter_cnf & A_CNF_10B_2) ? "BNC," : "" ); |
1518 | |
1519 | lp->irq_map = 0xffff; |
1520 | |
1521 | /* If this is a CS8900 then no pnp soft */ |
1522 | if (lp->chip_type != CS8900 && |
1523 | /* Check if the ISA IRQ has been set */ |
1524 | (i = readreg(dev, PP_CS8920_ISAINT) & 0xff, |
1525 | (i != 0 && i < CS8920_NO_INTS))) { |
1526 | if (!dev->irq) |
1527 | dev->irq = i; |
1528 | } else { |
1529 | i = lp->isa_config & INT_NO_MASK; |
1530 | #if IS_ENABLED(CONFIG_CS89x0_ISA) |
1531 | if (lp->chip_type == CS8900) { |
1532 | /* Translate the IRQ using the IRQ mapping table. */ |
1533 | if (i >= ARRAY_SIZE(cs8900_irq_map)) |
1534 | pr_err("invalid ISA interrupt number %d\n" , i); |
1535 | else |
1536 | i = cs8900_irq_map[i]; |
1537 | |
1538 | lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */ |
1539 | } else { |
1540 | int irq_map_buff[IRQ_MAP_LEN/2]; |
1541 | |
1542 | if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA, |
1543 | IRQ_MAP_LEN / 2, |
1544 | irq_map_buff) >= 0) { |
1545 | if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT) |
1546 | lp->irq_map = ((irq_map_buff[0] >> 8) | |
1547 | (irq_map_buff[1] << 8)); |
1548 | } |
1549 | } |
1550 | #endif |
1551 | if (!dev->irq) |
1552 | dev->irq = i; |
1553 | } |
1554 | |
1555 | pr_cont(" IRQ %d" , dev->irq); |
1556 | |
1557 | #if ALLOW_DMA |
1558 | if (lp->use_dma) { |
1559 | get_dma_channel(dev); |
1560 | pr_cont(", DMA %d" , dev->dma); |
1561 | } else |
1562 | #endif |
1563 | pr_cont(", programmed I/O" ); |
1564 | |
1565 | /* print the ethernet address. */ |
1566 | pr_cont(", MAC %pM\n" , dev->dev_addr); |
1567 | |
1568 | dev->netdev_ops = &net_ops; |
1569 | dev->watchdog_timeo = HZ; |
1570 | |
1571 | cs89_dbg(0, info, "cs89x0_probe1() successful\n" ); |
1572 | |
1573 | retval = register_netdev(dev); |
1574 | if (retval) |
1575 | goto out2; |
1576 | return 0; |
1577 | out2: |
1578 | iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); |
1579 | out1: |
1580 | return retval; |
1581 | } |
1582 | |
1583 | #if IS_ENABLED(CONFIG_CS89x0_ISA) |
1584 | /* |
1585 | * This function converts the I/O port address used by the cs89x0_probe() and |
1586 | * init_module() functions to the I/O memory address used by the |
1587 | * cs89x0_probe1() function. |
1588 | */ |
1589 | static int __init |
1590 | cs89x0_ioport_probe(struct net_device *dev, unsigned long ioport, int modular) |
1591 | { |
1592 | struct net_local *lp = netdev_priv(dev); |
1593 | int ret; |
1594 | void __iomem *io_mem; |
1595 | |
1596 | if (!lp) |
1597 | return -ENOMEM; |
1598 | |
1599 | dev->base_addr = ioport; |
1600 | |
1601 | if (!request_region(ioport, NETCARD_IO_EXTENT, DRV_NAME)) { |
1602 | ret = -EBUSY; |
1603 | goto out; |
1604 | } |
1605 | |
1606 | io_mem = ioport_map(ioport & ~3, NETCARD_IO_EXTENT); |
1607 | if (!io_mem) { |
1608 | ret = -ENOMEM; |
1609 | goto release; |
1610 | } |
1611 | |
1612 | /* if they give us an odd I/O address, then do ONE write to |
1613 | * the address port, to get it back to address zero, where we |
1614 | * expect to find the EISA signature word. An IO with a base of 0x3 |
1615 | * will skip the test for the ADD_PORT. |
1616 | */ |
1617 | if (ioport & 1) { |
1618 | cs89_dbg(1, info, "%s: odd ioaddr 0x%lx\n" , dev->name, ioport); |
1619 | if ((ioport & 2) != 2) { |
1620 | if ((ioread16(io_mem + ADD_PORT) & ADD_MASK) != |
1621 | ADD_SIG) { |
1622 | pr_err("%s: bad signature 0x%x\n" , |
1623 | dev->name, ioread16(io_mem + ADD_PORT)); |
1624 | ret = -ENODEV; |
1625 | goto unmap; |
1626 | } |
1627 | } |
1628 | } |
1629 | |
1630 | ret = cs89x0_probe1(dev, io_mem, modular); |
1631 | if (!ret) |
1632 | goto out; |
1633 | unmap: |
1634 | ioport_unmap(io_mem); |
1635 | release: |
1636 | release_region(ioport, NETCARD_IO_EXTENT); |
1637 | out: |
1638 | return ret; |
1639 | } |
1640 | |
1641 | #ifndef MODULE |
1642 | /* Check for a network adaptor of this type, and return '0' iff one exists. |
1643 | * If dev->base_addr == 0, probe all likely locations. |
1644 | * If dev->base_addr == 1, always return failure. |
1645 | * If dev->base_addr == 2, allocate space for the device and return success |
1646 | * (detachable devices only). |
1647 | * Return 0 on success. |
1648 | */ |
1649 | |
1650 | struct net_device * __init cs89x0_probe(int unit) |
1651 | { |
1652 | struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
1653 | unsigned *port; |
1654 | int err = 0; |
1655 | int irq; |
1656 | int io; |
1657 | |
1658 | if (!dev) |
1659 | return ERR_PTR(-ENODEV); |
1660 | |
1661 | sprintf(dev->name, "eth%d" , unit); |
1662 | netdev_boot_setup_check(dev); |
1663 | io = dev->base_addr; |
1664 | irq = dev->irq; |
1665 | |
1666 | cs89_dbg(0, info, "cs89x0_probe(0x%x)\n" , io); |
1667 | |
1668 | if (io > 0x1ff) { /* Check a single specified location. */ |
1669 | err = cs89x0_ioport_probe(dev, io, 0); |
1670 | } else if (io != 0) { /* Don't probe at all. */ |
1671 | err = -ENXIO; |
1672 | } else { |
1673 | for (port = netcard_portlist; *port; port++) { |
1674 | if (cs89x0_ioport_probe(dev, *port, 0) == 0) |
1675 | break; |
1676 | dev->irq = irq; |
1677 | } |
1678 | if (!*port) |
1679 | err = -ENODEV; |
1680 | } |
1681 | if (err) |
1682 | goto out; |
1683 | return dev; |
1684 | out: |
1685 | free_netdev(dev); |
1686 | pr_warn("no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n" ); |
1687 | return ERR_PTR(err); |
1688 | } |
1689 | #else |
1690 | static struct net_device *dev_cs89x0; |
1691 | |
1692 | /* Support the 'debug' module parm even if we're compiled for non-debug to |
1693 | * avoid breaking someone's startup scripts |
1694 | */ |
1695 | |
1696 | static int io; |
1697 | static int irq; |
1698 | static int debug; |
1699 | static char media[8]; |
1700 | static int duplex = -1; |
1701 | |
1702 | static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */ |
1703 | static int dma; |
1704 | static int dmasize = 16; /* or 64 */ |
1705 | |
1706 | module_param_hw(io, int, ioport, 0); |
1707 | module_param_hw(irq, int, irq, 0); |
1708 | module_param(debug, int, 0); |
1709 | module_param_string(media, media, sizeof(media), 0); |
1710 | module_param(duplex, int, 0); |
1711 | module_param_hw(dma , int, dma, 0); |
1712 | module_param(dmasize , int, 0); |
1713 | module_param(use_dma , int, 0); |
1714 | MODULE_PARM_DESC(io, "cs89x0 I/O base address" ); |
1715 | MODULE_PARM_DESC(irq, "cs89x0 IRQ number" ); |
1716 | #if DEBUGGING |
1717 | MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)" ); |
1718 | #else |
1719 | MODULE_PARM_DESC(debug, "(ignored)" ); |
1720 | #endif |
1721 | MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)" ); |
1722 | /* No other value than -1 for duplex seems to be currently interpreted */ |
1723 | MODULE_PARM_DESC(duplex, "(ignored)" ); |
1724 | #if ALLOW_DMA |
1725 | MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0" ); |
1726 | MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0" ); |
1727 | MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)" ); |
1728 | #else |
1729 | MODULE_PARM_DESC(dma , "(ignored)" ); |
1730 | MODULE_PARM_DESC(dmasize , "(ignored)" ); |
1731 | MODULE_PARM_DESC(use_dma , "(ignored)" ); |
1732 | #endif |
1733 | |
1734 | MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton" ); |
1735 | MODULE_LICENSE("GPL" ); |
1736 | |
1737 | /* |
1738 | * media=t - specify media type |
1739 | * or media=2 |
1740 | * or media=aui |
1741 | * or medai=auto |
1742 | * duplex=0 - specify forced half/full/autonegotiate duplex |
1743 | * debug=# - debug level |
1744 | * |
1745 | * Default Chip Configuration: |
1746 | * DMA Burst = enabled |
1747 | * IOCHRDY Enabled = enabled |
1748 | * UseSA = enabled |
1749 | * CS8900 defaults to half-duplex if not specified on command-line |
1750 | * CS8920 defaults to autoneg if not specified on command-line |
1751 | * Use reset defaults for other config parameters |
1752 | * |
1753 | * Assumptions: |
1754 | * media type specified is supported (circuitry is present) |
1755 | * if memory address is > 1MB, then required mem decode hw is present |
1756 | * if 10B-2, then agent other than driver will enable DC/DC converter |
1757 | * (hw or software util) |
1758 | */ |
1759 | |
1760 | static int __init cs89x0_isa_init_module(void) |
1761 | { |
1762 | struct net_device *dev; |
1763 | struct net_local *lp; |
1764 | int ret = 0; |
1765 | |
1766 | #if DEBUGGING |
1767 | net_debug = debug; |
1768 | #else |
1769 | debug = 0; |
1770 | #endif |
1771 | dev = alloc_etherdev(sizeof(struct net_local)); |
1772 | if (!dev) |
1773 | return -ENOMEM; |
1774 | |
1775 | dev->irq = irq; |
1776 | dev->base_addr = io; |
1777 | lp = netdev_priv(dev); |
1778 | |
1779 | #if ALLOW_DMA |
1780 | if (use_dma) { |
1781 | lp->use_dma = use_dma; |
1782 | lp->dma = dma; |
1783 | lp->dmasize = dmasize; |
1784 | } |
1785 | #endif |
1786 | |
1787 | spin_lock_init(&lp->lock); |
1788 | |
1789 | /* boy, they'd better get these right */ |
1790 | if (!strcmp(media, "rj45" )) |
1791 | lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; |
1792 | else if (!strcmp(media, "aui" )) |
1793 | lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI; |
1794 | else if (!strcmp(media, "bnc" )) |
1795 | lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2; |
1796 | else |
1797 | lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T; |
1798 | |
1799 | if (duplex == -1) |
1800 | lp->auto_neg_cnf = AUTO_NEG_ENABLE; |
1801 | |
1802 | if (io == 0) { |
1803 | pr_err("Module autoprobing not allowed\n" ); |
1804 | pr_err("Append io=0xNNN\n" ); |
1805 | ret = -EPERM; |
1806 | goto out; |
1807 | } else if (io <= 0x1ff) { |
1808 | ret = -ENXIO; |
1809 | goto out; |
1810 | } |
1811 | |
1812 | #if ALLOW_DMA |
1813 | if (use_dma && dmasize != 16 && dmasize != 64) { |
1814 | pr_err("dma size must be either 16K or 64K, not %dK\n" , |
1815 | dmasize); |
1816 | ret = -EPERM; |
1817 | goto out; |
1818 | } |
1819 | #endif |
1820 | ret = cs89x0_ioport_probe(dev, io, 1); |
1821 | if (ret) |
1822 | goto out; |
1823 | |
1824 | dev_cs89x0 = dev; |
1825 | return 0; |
1826 | out: |
1827 | free_netdev(dev); |
1828 | return ret; |
1829 | } |
1830 | module_init(cs89x0_isa_init_module); |
1831 | |
1832 | static void __exit cs89x0_isa_cleanup_module(void) |
1833 | { |
1834 | struct net_local *lp = netdev_priv(dev_cs89x0); |
1835 | |
1836 | unregister_netdev(dev_cs89x0); |
1837 | iowrite16(PP_ChipID, lp->virt_addr + ADD_PORT); |
1838 | ioport_unmap(lp->virt_addr); |
1839 | release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT); |
1840 | free_netdev(dev_cs89x0); |
1841 | } |
1842 | module_exit(cs89x0_isa_cleanup_module); |
1843 | #endif /* MODULE */ |
1844 | #endif /* CONFIG_CS89x0_ISA */ |
1845 | |
1846 | #if IS_ENABLED(CONFIG_CS89x0_PLATFORM) |
1847 | static int __init cs89x0_platform_probe(struct platform_device *pdev) |
1848 | { |
1849 | struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); |
1850 | void __iomem *virt_addr; |
1851 | int err; |
1852 | |
1853 | if (!dev) |
1854 | return -ENOMEM; |
1855 | |
1856 | dev->irq = platform_get_irq(pdev, 0); |
1857 | if (dev->irq < 0) { |
1858 | err = dev->irq; |
1859 | goto free; |
1860 | } |
1861 | |
1862 | virt_addr = devm_platform_ioremap_resource(pdev, index: 0); |
1863 | if (IS_ERR(ptr: virt_addr)) { |
1864 | err = PTR_ERR(ptr: virt_addr); |
1865 | goto free; |
1866 | } |
1867 | |
1868 | err = cs89x0_probe1(dev, ioaddr: virt_addr, modular: 0); |
1869 | if (err) { |
1870 | dev_warn(&dev->dev, "no cs8900 or cs8920 detected\n" ); |
1871 | goto free; |
1872 | } |
1873 | |
1874 | platform_set_drvdata(pdev, data: dev); |
1875 | return 0; |
1876 | |
1877 | free: |
1878 | free_netdev(dev); |
1879 | return err; |
1880 | } |
1881 | |
1882 | static void cs89x0_platform_remove(struct platform_device *pdev) |
1883 | { |
1884 | struct net_device *dev = platform_get_drvdata(pdev); |
1885 | |
1886 | /* This platform_get_resource() call will not return NULL, because |
1887 | * the same call in cs89x0_platform_probe() has returned a non NULL |
1888 | * value. |
1889 | */ |
1890 | unregister_netdev(dev); |
1891 | free_netdev(dev); |
1892 | } |
1893 | |
1894 | static const struct of_device_id __maybe_unused cs89x0_match[] = { |
1895 | { .compatible = "cirrus,cs8900" , }, |
1896 | { .compatible = "cirrus,cs8920" , }, |
1897 | { }, |
1898 | }; |
1899 | MODULE_DEVICE_TABLE(of, cs89x0_match); |
1900 | |
1901 | static struct platform_driver cs89x0_driver = { |
1902 | .driver = { |
1903 | .name = DRV_NAME, |
1904 | .of_match_table = of_match_ptr(cs89x0_match), |
1905 | }, |
1906 | .remove_new = cs89x0_platform_remove, |
1907 | }; |
1908 | |
1909 | module_platform_driver_probe(cs89x0_driver, cs89x0_platform_probe); |
1910 | |
1911 | #endif /* CONFIG_CS89x0_PLATFORM */ |
1912 | |
1913 | MODULE_LICENSE("GPL" ); |
1914 | MODULE_DESCRIPTION("Crystal Semiconductor (Now Cirrus Logic) CS89[02]0 network driver" ); |
1915 | MODULE_AUTHOR("Russell Nelson <nelson@crynwr.com>" ); |
1916 | |