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net: trans_start cleanups
[deliverable/linux.git] / drivers / net / cs89x0.c
1 /* cs89x0.c: A Crystal Semiconductor (Now Cirrus Logic) CS89[02]0
2 * driver for linux.
3 */
4
5 /*
6 Written 1996 by Russell Nelson, with reference to skeleton.c
7 written 1993-1994 by Donald Becker.
8
9 This software may be used and distributed according to the terms
10 of the GNU General Public License, incorporated herein by reference.
11
12 The author may be reached at nelson@crynwr.com, Crynwr
13 Software, 521 Pleasant Valley Rd., Potsdam, NY 13676
14
15 Changelog:
16
17 Mike Cruse : mcruse@cti-ltd.com
18 : Changes for Linux 2.0 compatibility.
19 : Added dev_id parameter in net_interrupt(),
20 : request_irq() and free_irq(). Just NULL for now.
21
22 Mike Cruse : Added MOD_INC_USE_COUNT and MOD_DEC_USE_COUNT macros
23 : in net_open() and net_close() so kerneld would know
24 : that the module is in use and wouldn't eject the
25 : driver prematurely.
26
27 Mike Cruse : Rewrote init_module() and cleanup_module using 8390.c
28 : as an example. Disabled autoprobing in init_module(),
29 : not a good thing to do to other devices while Linux
30 : is running from all accounts.
31
32 Russ Nelson : Jul 13 1998. Added RxOnly DMA support.
33
34 Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility.
35 : email: ethernet@crystal.cirrus.com
36
37 Alan Cox : Removed 1.2 support, added 2.1 extra counters.
38
39 Andrew Morton : Kernel 2.3.48
40 : Handle kmalloc() failures
41 : Other resource allocation fixes
42 : Add SMP locks
43 : Integrate Russ Nelson's ALLOW_DMA functionality back in.
44 : If ALLOW_DMA is true, make DMA runtime selectable
45 : Folded in changes from Cirrus (Melody Lee
46 : <klee@crystal.cirrus.com>)
47 : Don't call netif_wake_queue() in net_send_packet()
48 : Fixed an out-of-mem bug in dma_rx()
49 : Updated Documentation/networking/cs89x0.txt
50
51 Andrew Morton : Kernel 2.3.99-pre1
52 : Use skb_reserve to longword align IP header (two places)
53 : Remove a delay loop from dma_rx()
54 : Replace '100' with HZ
55 : Clean up a couple of skb API abuses
56 : Added 'cs89x0_dma=N' kernel boot option
57 : Correctly initialise lp->lock in non-module compile
58
59 Andrew Morton : Kernel 2.3.99-pre4-1
60 : MOD_INC/DEC race fix (see
61 : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html)
62
63 Andrew Morton : Kernel 2.4.0-test7-pre2
64 : Enhanced EEPROM support to cover more devices,
65 : abstracted IRQ mapping to support CONFIG_ARCH_CLPS7500 arch
66 : (Jason Gunthorpe <jgg@ualberta.ca>)
67
68 Andrew Morton : Kernel 2.4.0-test11-pre4
69 : Use dev->name in request_*() (Andrey Panin)
70 : Fix an error-path memleak in init_module()
71 : Preserve return value from request_irq()
72 : Fix type of `media' module parm (Keith Owens)
73 : Use SET_MODULE_OWNER()
74 : Tidied up strange request_irq() abuse in net_open().
75
76 Andrew Morton : Kernel 2.4.3-pre1
77 : Request correct number of pages for DMA (Hugh Dickens)
78 : Select PP_ChipID _after_ unregister_netdev in cleanup_module()
79 : because unregister_netdev() calls get_stats.
80 : Make `version[]' __initdata
81 : Uninlined the read/write reg/word functions.
82
83 Oskar Schirmer : oskar@scara.com
84 : HiCO.SH4 (superh) support added (irq#1, cs89x0_media=)
85
86 Deepak Saxena : dsaxena@plexity.net
87 : Intel IXDP2x01 (XScale ixp2x00 NPU) platform support
88
89 Dmitry Pervushin : dpervushin@ru.mvista.com
90 : PNX010X platform support
91
92 Deepak Saxena : dsaxena@plexity.net
93 : Intel IXDP2351 platform support
94
95 Dmitry Pervushin : dpervushin@ru.mvista.com
96 : PNX010X platform support
97
98 */
99
100 /* Always include 'config.h' first in case the user wants to turn on
101 or override something. */
102 #include <linux/module.h>
103
104 /*
105 * Set this to zero to disable DMA code
106 *
107 * Note that even if DMA is turned off we still support the 'dma' and 'use_dma'
108 * module options so we don't break any startup scripts.
109 */
110 #ifndef CONFIG_ISA_DMA_API
111 #define ALLOW_DMA 0
112 #else
113 #define ALLOW_DMA 1
114 #endif
115
116 /*
117 * Set this to zero to remove all the debug statements via
118 * dead code elimination
119 */
120 #define DEBUGGING 1
121
122 /*
123 Sources:
124
125 Crynwr packet driver epktisa.
126
127 Crystal Semiconductor data sheets.
128
129 */
130
131 #include <linux/errno.h>
132 #include <linux/netdevice.h>
133 #include <linux/etherdevice.h>
134 #include <linux/kernel.h>
135 #include <linux/types.h>
136 #include <linux/fcntl.h>
137 #include <linux/interrupt.h>
138 #include <linux/ioport.h>
139 #include <linux/in.h>
140 #include <linux/skbuff.h>
141 #include <linux/spinlock.h>
142 #include <linux/string.h>
143 #include <linux/init.h>
144 #include <linux/bitops.h>
145 #include <linux/delay.h>
146 #include <linux/gfp.h>
147
148 #include <asm/system.h>
149 #include <asm/io.h>
150 #include <asm/irq.h>
151 #if ALLOW_DMA
152 #include <asm/dma.h>
153 #endif
154
155 #include "cs89x0.h"
156
157 static char version[] __initdata =
158 "cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton\n";
159
160 #define DRV_NAME "cs89x0"
161
162 /* First, a few definitions that the brave might change.
163 A zero-terminated list of I/O addresses to be probed. Some special flags..
164 Addr & 1 = Read back the address port, look for signature and reset
165 the page window before probing
166 Addr & 3 = Reset the page window and probe
167 The CLPS eval board has the Cirrus chip at 0x80090300, in ARM IO space,
168 but it is possible that a Cirrus board could be plugged into the ISA
169 slots. */
170 /* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
171 them to system IRQ numbers. This mapping is card specific and is set to
172 the configuration of the Cirrus Eval board for this chip. */
173 #if defined(CONFIG_SH_HICOSH4)
174 static unsigned int netcard_portlist[] __used __initdata =
175 { 0x0300, 0};
176 static unsigned int cs8900_irq_map[] = {1,0,0,0};
177 #elif defined(CONFIG_MACH_IXDP2351)
178 static unsigned int netcard_portlist[] __used __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
179 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
180 #elif defined(CONFIG_ARCH_IXDP2X01)
181 static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
182 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
183 #elif defined(CONFIG_ARCH_PNX010X)
184 #include <mach/gpio.h>
185 #define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
186 #define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
187 static unsigned int netcard_portlist[] __used __initdata = {CIRRUS_DEFAULT_BASE, 0};
188 static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
189 #elif defined(CONFIG_MACH_MX31ADS)
190 #include <mach/board-mx31ads.h>
191 static unsigned int netcard_portlist[] __used __initdata = {
192 PBC_BASE_ADDRESS + PBC_CS8900A_IOBASE + 0x300, 0
193 };
194 static unsigned cs8900_irq_map[] = {EXPIO_INT_ENET_INT, 0, 0, 0};
195 #else
196 static unsigned int netcard_portlist[] __used __initdata =
197 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
198 static unsigned int cs8900_irq_map[] = {10,11,12,5};
199 #endif
200
201 #if DEBUGGING
202 static unsigned int net_debug = DEBUGGING;
203 #else
204 #define net_debug 0 /* gcc will remove all the debug code for us */
205 #endif
206
207 /* The number of low I/O ports used by the ethercard. */
208 #define NETCARD_IO_EXTENT 16
209
210 /* we allow the user to override various values normally set in the EEPROM */
211 #define FORCE_RJ45 0x0001 /* pick one of these three */
212 #define FORCE_AUI 0x0002
213 #define FORCE_BNC 0x0004
214
215 #define FORCE_AUTO 0x0010 /* pick one of these three */
216 #define FORCE_HALF 0x0020
217 #define FORCE_FULL 0x0030
218
219 /* Information that need to be kept for each board. */
220 struct net_local {
221 struct net_device_stats stats;
222 int chip_type; /* one of: CS8900, CS8920, CS8920M */
223 char chip_revision; /* revision letter of the chip ('A'...) */
224 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
225 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
226 int adapter_cnf; /* adapter configuration from EEPROM */
227 int isa_config; /* ISA configuration from EEPROM */
228 int irq_map; /* IRQ map from EEPROM */
229 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
230 int curr_rx_cfg; /* a copy of PP_RxCFG */
231 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
232 int send_underrun; /* keep track of how many underruns in a row we get */
233 int force; /* force various values; see FORCE* above. */
234 spinlock_t lock;
235 #if ALLOW_DMA
236 int use_dma; /* Flag: we're using dma */
237 int dma; /* DMA channel */
238 int dmasize; /* 16 or 64 */
239 unsigned char *dma_buff; /* points to the beginning of the buffer */
240 unsigned char *end_dma_buff; /* points to the end of the buffer */
241 unsigned char *rx_dma_ptr; /* points to the next packet */
242 #endif
243 };
244
245 /* Index to functions, as function prototypes. */
246
247 static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
248 static int net_open(struct net_device *dev);
249 static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev);
250 static irqreturn_t net_interrupt(int irq, void *dev_id);
251 static void set_multicast_list(struct net_device *dev);
252 static void net_timeout(struct net_device *dev);
253 static void net_rx(struct net_device *dev);
254 static int net_close(struct net_device *dev);
255 static struct net_device_stats *net_get_stats(struct net_device *dev);
256 static void reset_chip(struct net_device *dev);
257 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
258 static int get_eeprom_cksum(int off, int len, int *buffer);
259 static int set_mac_address(struct net_device *dev, void *addr);
260 static void count_rx_errors(int status, struct net_local *lp);
261 #ifdef CONFIG_NET_POLL_CONTROLLER
262 static void net_poll_controller(struct net_device *dev);
263 #endif
264 #if ALLOW_DMA
265 static void get_dma_channel(struct net_device *dev);
266 static void release_dma_buff(struct net_local *lp);
267 #endif
268
269 /* Example routines you must write ;->. */
270 #define tx_done(dev) 1
271
272 /*
273 * Permit 'cs89x0_dma=N' in the kernel boot environment
274 */
275 #if !defined(MODULE) && (ALLOW_DMA != 0)
276 static int g_cs89x0_dma;
277
278 static int __init dma_fn(char *str)
279 {
280 g_cs89x0_dma = simple_strtol(str,NULL,0);
281 return 1;
282 }
283
284 __setup("cs89x0_dma=", dma_fn);
285 #endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
286
287 #ifndef MODULE
288 static int g_cs89x0_media__force;
289
290 static int __init media_fn(char *str)
291 {
292 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
293 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
294 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
295 return 1;
296 }
297
298 __setup("cs89x0_media=", media_fn);
299
300
301 /* Check for a network adaptor of this type, and return '0' iff one exists.
302 If dev->base_addr == 0, probe all likely locations.
303 If dev->base_addr == 1, always return failure.
304 If dev->base_addr == 2, allocate space for the device and return success
305 (detachable devices only).
306 Return 0 on success.
307 */
308
309 struct net_device * __init cs89x0_probe(int unit)
310 {
311 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
312 unsigned *port;
313 int err = 0;
314 int irq;
315 int io;
316
317 if (!dev)
318 return ERR_PTR(-ENODEV);
319
320 sprintf(dev->name, "eth%d", unit);
321 netdev_boot_setup_check(dev);
322 io = dev->base_addr;
323 irq = dev->irq;
324
325 if (net_debug)
326 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
327
328 if (io > 0x1ff) { /* Check a single specified location. */
329 err = cs89x0_probe1(dev, io, 0);
330 } else if (io != 0) { /* Don't probe at all. */
331 err = -ENXIO;
332 } else {
333 for (port = netcard_portlist; *port; port++) {
334 if (cs89x0_probe1(dev, *port, 0) == 0)
335 break;
336 dev->irq = irq;
337 }
338 if (!*port)
339 err = -ENODEV;
340 }
341 if (err)
342 goto out;
343 return dev;
344 out:
345 free_netdev(dev);
346 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
347 return ERR_PTR(err);
348 }
349 #endif
350
351 #if defined(CONFIG_MACH_IXDP2351)
352 static u16
353 readword(unsigned long base_addr, int portno)
354 {
355 return __raw_readw(base_addr + (portno << 1));
356 }
357
358 static void
359 writeword(unsigned long base_addr, int portno, u16 value)
360 {
361 __raw_writew(value, base_addr + (portno << 1));
362 }
363 #elif defined(CONFIG_ARCH_IXDP2X01)
364 static u16
365 readword(unsigned long base_addr, int portno)
366 {
367 return __raw_readl(base_addr + (portno << 1));
368 }
369
370 static void
371 writeword(unsigned long base_addr, int portno, u16 value)
372 {
373 __raw_writel(value, base_addr + (portno << 1));
374 }
375 #elif defined(CONFIG_ARCH_PNX010X)
376 static u16
377 readword(unsigned long base_addr, int portno)
378 {
379 return inw(base_addr + (portno << 1));
380 }
381
382 static void
383 writeword(unsigned long base_addr, int portno, u16 value)
384 {
385 outw(value, base_addr + (portno << 1));
386 }
387 #else
388 static u16
389 readword(unsigned long base_addr, int portno)
390 {
391 return inw(base_addr + portno);
392 }
393
394 static void
395 writeword(unsigned long base_addr, int portno, u16 value)
396 {
397 outw(value, base_addr + portno);
398 }
399 #endif
400
401 static void
402 readwords(unsigned long base_addr, int portno, void *buf, int length)
403 {
404 u8 *buf8 = (u8 *)buf;
405
406 do {
407 u16 tmp16;
408
409 tmp16 = readword(base_addr, portno);
410 *buf8++ = (u8)tmp16;
411 *buf8++ = (u8)(tmp16 >> 8);
412 } while (--length);
413 }
414
415 static void
416 writewords(unsigned long base_addr, int portno, void *buf, int length)
417 {
418 u8 *buf8 = (u8 *)buf;
419
420 do {
421 u16 tmp16;
422
423 tmp16 = *buf8++;
424 tmp16 |= (*buf8++) << 8;
425 writeword(base_addr, portno, tmp16);
426 } while (--length);
427 }
428
429 static u16
430 readreg(struct net_device *dev, u16 regno)
431 {
432 writeword(dev->base_addr, ADD_PORT, regno);
433 return readword(dev->base_addr, DATA_PORT);
434 }
435
436 static void
437 writereg(struct net_device *dev, u16 regno, u16 value)
438 {
439 writeword(dev->base_addr, ADD_PORT, regno);
440 writeword(dev->base_addr, DATA_PORT, value);
441 }
442
443 static int __init
444 wait_eeprom_ready(struct net_device *dev)
445 {
446 int timeout = jiffies;
447 /* check to see if the EEPROM is ready, a timeout is used -
448 just in case EEPROM is ready when SI_BUSY in the
449 PP_SelfST is clear */
450 while(readreg(dev, PP_SelfST) & SI_BUSY)
451 if (jiffies - timeout >= 40)
452 return -1;
453 return 0;
454 }
455
456 static int __init
457 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
458 {
459 int i;
460
461 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
462 for (i = 0; i < len; i++) {
463 if (wait_eeprom_ready(dev) < 0) return -1;
464 /* Now send the EEPROM read command and EEPROM location to read */
465 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
466 if (wait_eeprom_ready(dev) < 0) return -1;
467 buffer[i] = readreg(dev, PP_EEData);
468 if (net_debug > 3) printk("%04x ", buffer[i]);
469 }
470 if (net_debug > 3) printk("\n");
471 return 0;
472 }
473
474 static int __init
475 get_eeprom_cksum(int off, int len, int *buffer)
476 {
477 int i, cksum;
478
479 cksum = 0;
480 for (i = 0; i < len; i++)
481 cksum += buffer[i];
482 cksum &= 0xffff;
483 if (cksum == 0)
484 return 0;
485 return -1;
486 }
487
488 #ifdef CONFIG_NET_POLL_CONTROLLER
489 /*
490 * Polling receive - used by netconsole and other diagnostic tools
491 * to allow network i/o with interrupts disabled.
492 */
493 static void net_poll_controller(struct net_device *dev)
494 {
495 disable_irq(dev->irq);
496 net_interrupt(dev->irq, dev);
497 enable_irq(dev->irq);
498 }
499 #endif
500
501 static const struct net_device_ops net_ops = {
502 .ndo_open = net_open,
503 .ndo_stop = net_close,
504 .ndo_tx_timeout = net_timeout,
505 .ndo_start_xmit = net_send_packet,
506 .ndo_get_stats = net_get_stats,
507 .ndo_set_multicast_list = set_multicast_list,
508 .ndo_set_mac_address = set_mac_address,
509 #ifdef CONFIG_NET_POLL_CONTROLLER
510 .ndo_poll_controller = net_poll_controller,
511 #endif
512 .ndo_change_mtu = eth_change_mtu,
513 .ndo_validate_addr = eth_validate_addr,
514 };
515
516 /* This is the real probe routine. Linux has a history of friendly device
517 probes on the ISA bus. A good device probes avoids doing writes, and
518 verifies that the correct device exists and functions.
519 Return 0 on success.
520 */
521
522 static int __init
523 cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
524 {
525 struct net_local *lp = netdev_priv(dev);
526 static unsigned version_printed;
527 int i;
528 int tmp;
529 unsigned rev_type = 0;
530 int eeprom_buff[CHKSUM_LEN];
531 int retval;
532
533 /* Initialize the device structure. */
534 if (!modular) {
535 memset(lp, 0, sizeof(*lp));
536 spin_lock_init(&lp->lock);
537 #ifndef MODULE
538 #if ALLOW_DMA
539 if (g_cs89x0_dma) {
540 lp->use_dma = 1;
541 lp->dma = g_cs89x0_dma;
542 lp->dmasize = 16; /* Could make this an option... */
543 }
544 #endif
545 lp->force = g_cs89x0_media__force;
546 #endif
547 }
548
549 #ifdef CONFIG_ARCH_PNX010X
550 initialize_ebi();
551
552 /* Map GPIO registers for the pins connected to the CS8900a. */
553 if (map_cirrus_gpio() < 0)
554 return -ENODEV;
555
556 reset_cirrus();
557
558 /* Map event-router registers. */
559 if (map_event_router() < 0)
560 return -ENODEV;
561
562 enable_cirrus_irq();
563
564 unmap_cirrus_gpio();
565 unmap_event_router();
566
567 dev->base_addr = ioaddr;
568
569 for (i = 0 ; i < 3 ; i++)
570 readreg(dev, 0);
571 #endif
572
573 /* Grab the region so we can find another board if autoIRQ fails. */
574 /* WTF is going on here? */
575 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
576 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
577 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
578 retval = -EBUSY;
579 goto out1;
580 }
581
582 #ifdef CONFIG_SH_HICOSH4
583 /* truly reset the chip */
584 writeword(ioaddr, ADD_PORT, 0x0114);
585 writeword(ioaddr, DATA_PORT, 0x0040);
586 #endif
587
588 /* if they give us an odd I/O address, then do ONE write to
589 the address port, to get it back to address zero, where we
590 expect to find the EISA signature word. An IO with a base of 0x3
591 will skip the test for the ADD_PORT. */
592 if (ioaddr & 1) {
593 if (net_debug > 1)
594 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
595 if ((ioaddr & 2) != 2)
596 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
597 printk(KERN_ERR "%s: bad signature 0x%x\n",
598 dev->name, readword(ioaddr & ~3, ADD_PORT));
599 retval = -ENODEV;
600 goto out2;
601 }
602 }
603
604 ioaddr &= ~3;
605 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
606 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
607 writeword(ioaddr, ADD_PORT, PP_ChipID);
608
609 tmp = readword(ioaddr, DATA_PORT);
610 if (tmp != CHIP_EISA_ID_SIG) {
611 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
612 CHIP_EISA_ID_SIG_STR "\n",
613 dev->name, ioaddr, DATA_PORT, tmp);
614 retval = -ENODEV;
615 goto out2;
616 }
617
618 /* Fill in the 'dev' fields. */
619 dev->base_addr = ioaddr;
620
621 /* get the chip type */
622 rev_type = readreg(dev, PRODUCT_ID_ADD);
623 lp->chip_type = rev_type &~ REVISON_BITS;
624 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
625
626 /* Check the chip type and revision in order to set the correct send command
627 CS8920 revision C and CS8900 revision F can use the faster send. */
628 lp->send_cmd = TX_AFTER_381;
629 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
630 lp->send_cmd = TX_NOW;
631 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
632 lp->send_cmd = TX_NOW;
633
634 if (net_debug && version_printed++ == 0)
635 printk(version);
636
637 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
638 dev->name,
639 lp->chip_type==CS8900?'0':'2',
640 lp->chip_type==CS8920M?"M":"",
641 lp->chip_revision,
642 dev->base_addr);
643
644 reset_chip(dev);
645
646 /* Here we read the current configuration of the chip. If there
647 is no Extended EEPROM then the idea is to not disturb the chip
648 configuration, it should have been correctly setup by automatic
649 EEPROM read on reset. So, if the chip says it read the EEPROM
650 the driver will always do *something* instead of complain that
651 adapter_cnf is 0. */
652
653 #ifdef CONFIG_SH_HICOSH4
654 if (1) {
655 /* For the HiCO.SH4 board, things are different: we don't
656 have EEPROM, but there is some data in flash, so we go
657 get it there directly (MAC). */
658 __u16 *confd;
659 short cnt;
660 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
661 == 0x006c3000) {
662 confd = (__u16*) 0xa0013fc0;
663 } else {
664 confd = (__u16*) 0xa001ffc0;
665 }
666 cnt = (*confd++ & 0x00ff) >> 1;
667 while (--cnt > 0) {
668 __u16 j = *confd++;
669
670 switch (j & 0x0fff) {
671 case PP_IA:
672 for (i = 0; i < ETH_ALEN/2; i++) {
673 dev->dev_addr[i*2] = confd[i] & 0xFF;
674 dev->dev_addr[i*2+1] = confd[i] >> 8;
675 }
676 break;
677 }
678 j = (j >> 12) + 1;
679 confd += j;
680 cnt -= j;
681 }
682 } else
683 #endif
684
685 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
686 (EEPROM_OK|EEPROM_PRESENT)) {
687 /* Load the MAC. */
688 for (i=0; i < ETH_ALEN/2; i++) {
689 unsigned int Addr;
690 Addr = readreg(dev, PP_IA+i*2);
691 dev->dev_addr[i*2] = Addr & 0xFF;
692 dev->dev_addr[i*2+1] = Addr >> 8;
693 }
694
695 /* Load the Adapter Configuration.
696 Note: Barring any more specific information from some
697 other source (ie EEPROM+Schematics), we would not know
698 how to operate a 10Base2 interface on the AUI port.
699 However, since we do read the status of HCB1 and use
700 settings that always result in calls to control_dc_dc(dev,0)
701 a BNC interface should work if the enable pin
702 (dc/dc converter) is on HCB1. It will be called AUI
703 however. */
704
705 lp->adapter_cnf = 0;
706 i = readreg(dev, PP_LineCTL);
707 /* Preserve the setting of the HCB1 pin. */
708 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
709 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
710 /* Save the sqelch bit */
711 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
712 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
713 /* Check if the card is in 10Base-t only mode */
714 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
715 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
716 /* Check if the card is in AUI only mode */
717 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
718 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
719 /* Check if the card is in Auto mode. */
720 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
721 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
722 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
723
724 if (net_debug > 1)
725 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
726 dev->name, i, lp->adapter_cnf);
727
728 /* IRQ. Other chips already probe, see below. */
729 if (lp->chip_type == CS8900)
730 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
731
732 printk( "[Cirrus EEPROM] ");
733 }
734
735 printk("\n");
736
737 /* First check to see if an EEPROM is attached. */
738 #ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
739 if (1) {
740 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
741 } else
742 #endif
743 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
744 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
745 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
746 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
747 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
748 /* Check if the chip was able to read its own configuration starting
749 at 0 in the EEPROM*/
750 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
751 (EEPROM_OK|EEPROM_PRESENT))
752 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
753
754 } else {
755 /* This reads an extended EEPROM that is not documented
756 in the CS8900 datasheet. */
757
758 /* get transmission control word but keep the autonegotiation bits */
759 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
760 /* Store adapter configuration */
761 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
762 /* Store ISA configuration */
763 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
764 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
765
766 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
767 /* store the initial memory base address */
768 for (i = 0; i < ETH_ALEN/2; i++) {
769 dev->dev_addr[i*2] = eeprom_buff[i];
770 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
771 }
772 if (net_debug > 1)
773 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
774 dev->name, lp->adapter_cnf);
775 }
776
777 /* allow them to force multiple transceivers. If they force multiple, autosense */
778 {
779 int count = 0;
780 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
781 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
782 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
783 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
784 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
785 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
786 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
787 }
788
789 if (net_debug > 1)
790 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
791 dev->name, lp->force, lp->adapter_cnf);
792
793 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
794
795 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
796
797 /* FIXME: we don't set the Ethernet address on the command line. Use
798 ifconfig IFACE hw ether AABBCCDDEEFF */
799
800 printk(KERN_INFO "cs89x0 media %s%s%s",
801 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
802 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
803 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
804
805 lp->irq_map = 0xffff;
806
807 /* If this is a CS8900 then no pnp soft */
808 if (lp->chip_type != CS8900 &&
809 /* Check if the ISA IRQ has been set */
810 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
811 (i != 0 && i < CS8920_NO_INTS))) {
812 if (!dev->irq)
813 dev->irq = i;
814 } else {
815 i = lp->isa_config & INT_NO_MASK;
816 if (lp->chip_type == CS8900) {
817 #ifdef CONFIG_CS89x0_NONISA_IRQ
818 i = cs8900_irq_map[0];
819 #else
820 /* Translate the IRQ using the IRQ mapping table. */
821 if (i >= ARRAY_SIZE(cs8900_irq_map))
822 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
823 else
824 i = cs8900_irq_map[i];
825
826 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
827 } else {
828 int irq_map_buff[IRQ_MAP_LEN/2];
829
830 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
831 IRQ_MAP_LEN/2,
832 irq_map_buff) >= 0) {
833 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
834 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
835 }
836 #endif
837 }
838 if (!dev->irq)
839 dev->irq = i;
840 }
841
842 printk(" IRQ %d", dev->irq);
843
844 #if ALLOW_DMA
845 if (lp->use_dma) {
846 get_dma_channel(dev);
847 printk(", DMA %d", dev->dma);
848 }
849 else
850 #endif
851 {
852 printk(", programmed I/O");
853 }
854
855 /* print the ethernet address. */
856 printk(", MAC %pM", dev->dev_addr);
857
858 dev->netdev_ops = &net_ops;
859 dev->watchdog_timeo = HZ;
860
861 printk("\n");
862 if (net_debug)
863 printk("cs89x0_probe1() successful\n");
864
865 retval = register_netdev(dev);
866 if (retval)
867 goto out3;
868 return 0;
869 out3:
870 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
871 out2:
872 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
873 out1:
874 return retval;
875 }
876
877
878 /*********************************
879 * This page contains DMA routines
880 **********************************/
881
882 #if ALLOW_DMA
883
884 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
885
886 static void
887 get_dma_channel(struct net_device *dev)
888 {
889 struct net_local *lp = netdev_priv(dev);
890
891 if (lp->dma) {
892 dev->dma = lp->dma;
893 lp->isa_config |= ISA_RxDMA;
894 } else {
895 if ((lp->isa_config & ANY_ISA_DMA) == 0)
896 return;
897 dev->dma = lp->isa_config & DMA_NO_MASK;
898 if (lp->chip_type == CS8900)
899 dev->dma += 5;
900 if (dev->dma < 5 || dev->dma > 7) {
901 lp->isa_config &= ~ANY_ISA_DMA;
902 return;
903 }
904 }
905 return;
906 }
907
908 static void
909 write_dma(struct net_device *dev, int chip_type, int dma)
910 {
911 struct net_local *lp = netdev_priv(dev);
912 if ((lp->isa_config & ANY_ISA_DMA) == 0)
913 return;
914 if (chip_type == CS8900) {
915 writereg(dev, PP_CS8900_ISADMA, dma-5);
916 } else {
917 writereg(dev, PP_CS8920_ISADMA, dma);
918 }
919 }
920
921 static void
922 set_dma_cfg(struct net_device *dev)
923 {
924 struct net_local *lp = netdev_priv(dev);
925
926 if (lp->use_dma) {
927 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
928 if (net_debug > 3)
929 printk("set_dma_cfg(): no DMA\n");
930 return;
931 }
932 if (lp->isa_config & ISA_RxDMA) {
933 lp->curr_rx_cfg |= RX_DMA_ONLY;
934 if (net_debug > 3)
935 printk("set_dma_cfg(): RX_DMA_ONLY\n");
936 } else {
937 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
938 if (net_debug > 3)
939 printk("set_dma_cfg(): AUTO_RX_DMA\n");
940 }
941 }
942 }
943
944 static int
945 dma_bufcfg(struct net_device *dev)
946 {
947 struct net_local *lp = netdev_priv(dev);
948 if (lp->use_dma)
949 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
950 else
951 return 0;
952 }
953
954 static int
955 dma_busctl(struct net_device *dev)
956 {
957 int retval = 0;
958 struct net_local *lp = netdev_priv(dev);
959 if (lp->use_dma) {
960 if (lp->isa_config & ANY_ISA_DMA)
961 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
962 if (lp->isa_config & DMA_BURST)
963 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
964 if (lp->dmasize == 64)
965 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
966 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
967 }
968 return retval;
969 }
970
971 static void
972 dma_rx(struct net_device *dev)
973 {
974 struct net_local *lp = netdev_priv(dev);
975 struct sk_buff *skb;
976 int status, length;
977 unsigned char *bp = lp->rx_dma_ptr;
978
979 status = bp[0] + (bp[1]<<8);
980 length = bp[2] + (bp[3]<<8);
981 bp += 4;
982 if (net_debug > 5) {
983 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
984 dev->name, (unsigned long)bp, status, length);
985 }
986 if ((status & RX_OK) == 0) {
987 count_rx_errors(status, lp);
988 goto skip_this_frame;
989 }
990
991 /* Malloc up new buffer. */
992 skb = dev_alloc_skb(length + 2);
993 if (skb == NULL) {
994 if (net_debug) /* I don't think we want to do this to a stressed system */
995 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
996 lp->stats.rx_dropped++;
997
998 /* AKPM: advance bp to the next frame */
999 skip_this_frame:
1000 bp += (length + 3) & ~3;
1001 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1002 lp->rx_dma_ptr = bp;
1003 return;
1004 }
1005 skb_reserve(skb, 2); /* longword align L3 header */
1006
1007 if (bp + length > lp->end_dma_buff) {
1008 int semi_cnt = lp->end_dma_buff - bp;
1009 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1010 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1011 length - semi_cnt);
1012 } else {
1013 memcpy(skb_put(skb,length), bp, length);
1014 }
1015 bp += (length + 3) & ~3;
1016 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1017 lp->rx_dma_ptr = bp;
1018
1019 if (net_debug > 3) {
1020 printk( "%s: received %d byte DMA packet of type %x\n",
1021 dev->name, length,
1022 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1023 }
1024 skb->protocol=eth_type_trans(skb,dev);
1025 netif_rx(skb);
1026 lp->stats.rx_packets++;
1027 lp->stats.rx_bytes += length;
1028 }
1029
1030 #endif /* ALLOW_DMA */
1031
1032 static void __init reset_chip(struct net_device *dev)
1033 {
1034 #if !defined(CONFIG_MACH_MX31ADS)
1035 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1036 struct net_local *lp = netdev_priv(dev);
1037 int ioaddr = dev->base_addr;
1038 #endif
1039 int reset_start_time;
1040
1041 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1042
1043 /* wait 30 ms */
1044 msleep(30);
1045
1046 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1047 if (lp->chip_type != CS8900) {
1048 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1049 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1050 outb(dev->irq, ioaddr + DATA_PORT);
1051 outb(0, ioaddr + DATA_PORT + 1);
1052
1053 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1054 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1055 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1056 }
1057 #endif /* IXDP2x01 */
1058
1059 /* Wait until the chip is reset */
1060 reset_start_time = jiffies;
1061 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1062 ;
1063 #endif /* !CONFIG_MACH_MX31ADS */
1064 }
1065
1066
1067 static void
1068 control_dc_dc(struct net_device *dev, int on_not_off)
1069 {
1070 struct net_local *lp = netdev_priv(dev);
1071 unsigned int selfcontrol;
1072 int timenow = jiffies;
1073 /* control the DC to DC convertor in the SelfControl register.
1074 Note: This is hooked up to a general purpose pin, might not
1075 always be a DC to DC convertor. */
1076
1077 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1078 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1079 selfcontrol |= HCB1;
1080 else
1081 selfcontrol &= ~HCB1;
1082 writereg(dev, PP_SelfCTL, selfcontrol);
1083
1084 /* Wait for the DC/DC converter to power up - 500ms */
1085 while (jiffies - timenow < HZ)
1086 ;
1087 }
1088
1089 #define DETECTED_NONE 0
1090 #define DETECTED_RJ45H 1
1091 #define DETECTED_RJ45F 2
1092 #define DETECTED_AUI 3
1093 #define DETECTED_BNC 4
1094
1095 static int
1096 detect_tp(struct net_device *dev)
1097 {
1098 struct net_local *lp = netdev_priv(dev);
1099 int timenow = jiffies;
1100 int fdx;
1101
1102 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1103
1104 /* If connected to another full duplex capable 10-Base-T card the link pulses
1105 seem to be lost when the auto detect bit in the LineCTL is set.
1106 To overcome this the auto detect bit will be cleared whilst testing the
1107 10-Base-T interface. This would not be necessary for the sparrow chip but
1108 is simpler to do it anyway. */
1109 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1110 control_dc_dc(dev, 0);
1111
1112 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1113 for (timenow = jiffies; jiffies - timenow < 15; )
1114 ;
1115 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1116 return DETECTED_NONE;
1117
1118 if (lp->chip_type == CS8900) {
1119 switch (lp->force & 0xf0) {
1120 #if 0
1121 case FORCE_AUTO:
1122 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1123 return DETECTED_NONE;
1124 #endif
1125 /* CS8900 doesn't support AUTO, change to HALF*/
1126 case FORCE_AUTO:
1127 lp->force &= ~FORCE_AUTO;
1128 lp->force |= FORCE_HALF;
1129 break;
1130 case FORCE_HALF:
1131 break;
1132 case FORCE_FULL:
1133 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1134 break;
1135 }
1136 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1137 } else {
1138 switch (lp->force & 0xf0) {
1139 case FORCE_AUTO:
1140 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1141 break;
1142 case FORCE_HALF:
1143 lp->auto_neg_cnf = 0;
1144 break;
1145 case FORCE_FULL:
1146 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1147 break;
1148 }
1149
1150 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1151
1152 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1153 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1154 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1155 if (jiffies - timenow > 4000) {
1156 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1157 break;
1158 }
1159 }
1160 }
1161 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1162 }
1163 if (fdx)
1164 return DETECTED_RJ45F;
1165 else
1166 return DETECTED_RJ45H;
1167 }
1168
1169 /* send a test packet - return true if carrier bits are ok */
1170 static int
1171 send_test_pkt(struct net_device *dev)
1172 {
1173 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1174 0, 46, /* A 46 in network order */
1175 0, 0, /* DSAP=0 & SSAP=0 fields */
1176 0xf3, 0 /* Control (Test Req + P bit set) */ };
1177 long timenow = jiffies;
1178
1179 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1180
1181 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1182 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1183
1184 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1185 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1186
1187 /* Test to see if the chip has allocated memory for the packet */
1188 while (jiffies - timenow < 5)
1189 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1190 break;
1191 if (jiffies - timenow >= 5)
1192 return 0; /* this shouldn't happen */
1193
1194 /* Write the contents of the packet */
1195 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1196
1197 if (net_debug > 1) printk("Sending test packet ");
1198 /* wait a couple of jiffies for packet to be received */
1199 for (timenow = jiffies; jiffies - timenow < 3; )
1200 ;
1201 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1202 if (net_debug > 1) printk("succeeded\n");
1203 return 1;
1204 }
1205 if (net_debug > 1) printk("failed\n");
1206 return 0;
1207 }
1208
1209
1210 static int
1211 detect_aui(struct net_device *dev)
1212 {
1213 struct net_local *lp = netdev_priv(dev);
1214
1215 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1216 control_dc_dc(dev, 0);
1217
1218 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1219
1220 if (send_test_pkt(dev))
1221 return DETECTED_AUI;
1222 else
1223 return DETECTED_NONE;
1224 }
1225
1226 static int
1227 detect_bnc(struct net_device *dev)
1228 {
1229 struct net_local *lp = netdev_priv(dev);
1230
1231 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1232 control_dc_dc(dev, 1);
1233
1234 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1235
1236 if (send_test_pkt(dev))
1237 return DETECTED_BNC;
1238 else
1239 return DETECTED_NONE;
1240 }
1241
1242
1243 static void
1244 write_irq(struct net_device *dev, int chip_type, int irq)
1245 {
1246 int i;
1247
1248 if (chip_type == CS8900) {
1249 /* Search the mapping table for the corresponding IRQ pin. */
1250 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1251 if (cs8900_irq_map[i] == irq)
1252 break;
1253 /* Not found */
1254 if (i == ARRAY_SIZE(cs8900_irq_map))
1255 i = 3;
1256 writereg(dev, PP_CS8900_ISAINT, i);
1257 } else {
1258 writereg(dev, PP_CS8920_ISAINT, irq);
1259 }
1260 }
1261
1262 /* Open/initialize the board. This is called (in the current kernel)
1263 sometime after booting when the 'ifconfig' program is run.
1264
1265 This routine should set everything up anew at each open, even
1266 registers that "should" only need to be set once at boot, so that
1267 there is non-reboot way to recover if something goes wrong.
1268 */
1269
1270 /* AKPM: do we need to do any locking here? */
1271
1272 static int
1273 net_open(struct net_device *dev)
1274 {
1275 struct net_local *lp = netdev_priv(dev);
1276 int result = 0;
1277 int i;
1278 int ret;
1279
1280 #if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1281 if (dev->irq < 2) {
1282 /* Allow interrupts to be generated by the chip */
1283 /* Cirrus' release had this: */
1284 #if 0
1285 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1286 #endif
1287 /* And 2.3.47 had this: */
1288 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1289
1290 for (i = 2; i < CS8920_NO_INTS; i++) {
1291 if ((1 << i) & lp->irq_map) {
1292 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1293 dev->irq = i;
1294 write_irq(dev, lp->chip_type, i);
1295 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1296 break;
1297 }
1298 }
1299 }
1300
1301 if (i >= CS8920_NO_INTS) {
1302 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1303 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1304 ret = -EAGAIN;
1305 goto bad_out;
1306 }
1307 }
1308 else
1309 #endif
1310 {
1311 #ifndef CONFIG_CS89x0_NONISA_IRQ
1312 if (((1 << dev->irq) & lp->irq_map) == 0) {
1313 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1314 dev->name, dev->irq, lp->irq_map);
1315 ret = -EAGAIN;
1316 goto bad_out;
1317 }
1318 #endif
1319 /* FIXME: Cirrus' release had this: */
1320 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1321 /* And 2.3.47 had this: */
1322 #if 0
1323 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1324 #endif
1325 write_irq(dev, lp->chip_type, dev->irq);
1326 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
1327 if (ret) {
1328 printk(KERN_ERR "cs89x0: request_irq(%d) failed\n", dev->irq);
1329 goto bad_out;
1330 }
1331 }
1332
1333 #if ALLOW_DMA
1334 if (lp->use_dma) {
1335 if (lp->isa_config & ANY_ISA_DMA) {
1336 unsigned long flags;
1337 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1338 get_order(lp->dmasize * 1024));
1339
1340 if (!lp->dma_buff) {
1341 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1342 goto release_irq;
1343 }
1344 if (net_debug > 1) {
1345 printk( "%s: dma %lx %lx\n",
1346 dev->name,
1347 (unsigned long)lp->dma_buff,
1348 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1349 }
1350 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1351 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1352 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1353 goto release_irq;
1354 }
1355 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1356 if (request_dma(dev->dma, dev->name)) {
1357 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1358 goto release_irq;
1359 }
1360 write_dma(dev, lp->chip_type, dev->dma);
1361 lp->rx_dma_ptr = lp->dma_buff;
1362 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1363 spin_lock_irqsave(&lp->lock, flags);
1364 disable_dma(dev->dma);
1365 clear_dma_ff(dev->dma);
1366 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
1367 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1368 set_dma_count(dev->dma, lp->dmasize*1024);
1369 enable_dma(dev->dma);
1370 spin_unlock_irqrestore(&lp->lock, flags);
1371 }
1372 }
1373 #endif /* ALLOW_DMA */
1374
1375 /* set the Ethernet address */
1376 for (i=0; i < ETH_ALEN/2; i++)
1377 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1378
1379 /* while we're testing the interface, leave interrupts disabled */
1380 writereg(dev, PP_BusCTL, MEMORY_ON);
1381
1382 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1383 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1384 lp->linectl = LOW_RX_SQUELCH;
1385 else
1386 lp->linectl = 0;
1387
1388 /* check to make sure that they have the "right" hardware available */
1389 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1390 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1391 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1392 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1393 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1394 }
1395 #ifdef CONFIG_ARCH_PNX010X
1396 result = A_CNF_10B_T;
1397 #endif
1398 if (!result) {
1399 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1400 release_dma:
1401 #if ALLOW_DMA
1402 free_dma(dev->dma);
1403 release_irq:
1404 release_dma_buff(lp);
1405 #endif
1406 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1407 free_irq(dev->irq, dev);
1408 ret = -EAGAIN;
1409 goto bad_out;
1410 }
1411
1412 /* set the hardware to the configured choice */
1413 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1414 case A_CNF_MEDIA_10B_T:
1415 result = detect_tp(dev);
1416 if (result==DETECTED_NONE) {
1417 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1418 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1419 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1420 }
1421 break;
1422 case A_CNF_MEDIA_AUI:
1423 result = detect_aui(dev);
1424 if (result==DETECTED_NONE) {
1425 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1426 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1427 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1428 }
1429 break;
1430 case A_CNF_MEDIA_10B_2:
1431 result = detect_bnc(dev);
1432 if (result==DETECTED_NONE) {
1433 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1434 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1435 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1436 }
1437 break;
1438 case A_CNF_MEDIA_AUTO:
1439 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1440 if (lp->adapter_cnf & A_CNF_10B_T)
1441 if ((result = detect_tp(dev)) != DETECTED_NONE)
1442 break;
1443 if (lp->adapter_cnf & A_CNF_AUI)
1444 if ((result = detect_aui(dev)) != DETECTED_NONE)
1445 break;
1446 if (lp->adapter_cnf & A_CNF_10B_2)
1447 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1448 break;
1449 printk(KERN_ERR "%s: no media detected\n", dev->name);
1450 goto release_dma;
1451 }
1452 switch(result) {
1453 case DETECTED_NONE:
1454 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1455 goto release_dma;
1456 case DETECTED_RJ45H:
1457 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1458 break;
1459 case DETECTED_RJ45F:
1460 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1461 break;
1462 case DETECTED_AUI:
1463 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1464 break;
1465 case DETECTED_BNC:
1466 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1467 break;
1468 }
1469
1470 /* Turn on both receive and transmit operations */
1471 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1472
1473 /* Receive only error free packets addressed to this card */
1474 lp->rx_mode = 0;
1475 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1476
1477 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1478
1479 if (lp->isa_config & STREAM_TRANSFER)
1480 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1481 #if ALLOW_DMA
1482 set_dma_cfg(dev);
1483 #endif
1484 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1485
1486 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1487 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1488
1489 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1490 #if ALLOW_DMA
1491 dma_bufcfg(dev) |
1492 #endif
1493 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1494
1495 /* now that we've got our act together, enable everything */
1496 writereg(dev, PP_BusCTL, ENABLE_IRQ
1497 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1498 #if ALLOW_DMA
1499 | dma_busctl(dev)
1500 #endif
1501 );
1502 netif_start_queue(dev);
1503 if (net_debug > 1)
1504 printk("cs89x0: net_open() succeeded\n");
1505 return 0;
1506 bad_out:
1507 return ret;
1508 }
1509
1510 static void net_timeout(struct net_device *dev)
1511 {
1512 /* If we get here, some higher level has decided we are broken.
1513 There should really be a "kick me" function call instead. */
1514 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1515 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1516 /* Try to restart the adaptor. */
1517 netif_wake_queue(dev);
1518 }
1519
1520 static netdev_tx_t net_send_packet(struct sk_buff *skb,struct net_device *dev)
1521 {
1522 struct net_local *lp = netdev_priv(dev);
1523 unsigned long flags;
1524
1525 if (net_debug > 3) {
1526 printk("%s: sent %d byte packet of type %x\n",
1527 dev->name, skb->len,
1528 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1529 }
1530
1531 /* keep the upload from being interrupted, since we
1532 ask the chip to start transmitting before the
1533 whole packet has been completely uploaded. */
1534
1535 spin_lock_irqsave(&lp->lock, flags);
1536 netif_stop_queue(dev);
1537
1538 /* initiate a transmit sequence */
1539 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1540 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1541
1542 /* Test to see if the chip has allocated memory for the packet */
1543 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1544 /*
1545 * Gasp! It hasn't. But that shouldn't happen since
1546 * we're waiting for TxOk, so return 1 and requeue this packet.
1547 */
1548
1549 spin_unlock_irqrestore(&lp->lock, flags);
1550 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1551 return NETDEV_TX_BUSY;
1552 }
1553 /* Write the contents of the packet */
1554 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1555 spin_unlock_irqrestore(&lp->lock, flags);
1556 lp->stats.tx_bytes += skb->len;
1557 dev_kfree_skb (skb);
1558
1559 /*
1560 * We DO NOT call netif_wake_queue() here.
1561 * We also DO NOT call netif_start_queue().
1562 *
1563 * Either of these would cause another bottom half run through
1564 * net_send_packet() before this packet has fully gone out. That causes
1565 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1566 * a dog. We just return and wait for the Tx completion interrupt handler
1567 * to restart the netdevice layer
1568 */
1569
1570 return NETDEV_TX_OK;
1571 }
1572
1573 /* The typical workload of the driver:
1574 Handle the network interface interrupts. */
1575
1576 static irqreturn_t net_interrupt(int irq, void *dev_id)
1577 {
1578 struct net_device *dev = dev_id;
1579 struct net_local *lp;
1580 int ioaddr, status;
1581 int handled = 0;
1582
1583 ioaddr = dev->base_addr;
1584 lp = netdev_priv(dev);
1585
1586 /* we MUST read all the events out of the ISQ, otherwise we'll never
1587 get interrupted again. As a consequence, we can't have any limit
1588 on the number of times we loop in the interrupt handler. The
1589 hardware guarantees that eventually we'll run out of events. Of
1590 course, if you're on a slow machine, and packets are arriving
1591 faster than you can read them off, you're screwed. Hasta la
1592 vista, baby! */
1593 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1594 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1595 handled = 1;
1596 switch(status & ISQ_EVENT_MASK) {
1597 case ISQ_RECEIVER_EVENT:
1598 /* Got a packet(s). */
1599 net_rx(dev);
1600 break;
1601 case ISQ_TRANSMITTER_EVENT:
1602 lp->stats.tx_packets++;
1603 netif_wake_queue(dev); /* Inform upper layers. */
1604 if ((status & ( TX_OK |
1605 TX_LOST_CRS |
1606 TX_SQE_ERROR |
1607 TX_LATE_COL |
1608 TX_16_COL)) != TX_OK) {
1609 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1610 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1611 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1612 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1613 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1614 }
1615 break;
1616 case ISQ_BUFFER_EVENT:
1617 if (status & READY_FOR_TX) {
1618 /* we tried to transmit a packet earlier,
1619 but inexplicably ran out of buffers.
1620 That shouldn't happen since we only ever
1621 load one packet. Shrug. Do the right
1622 thing anyway. */
1623 netif_wake_queue(dev); /* Inform upper layers. */
1624 }
1625 if (status & TX_UNDERRUN) {
1626 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1627 lp->send_underrun++;
1628 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1629 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1630 /* transmit cycle is done, although
1631 frame wasn't transmitted - this
1632 avoids having to wait for the upper
1633 layers to timeout on us, in the
1634 event of a tx underrun */
1635 netif_wake_queue(dev); /* Inform upper layers. */
1636 }
1637 #if ALLOW_DMA
1638 if (lp->use_dma && (status & RX_DMA)) {
1639 int count = readreg(dev, PP_DmaFrameCnt);
1640 while(count) {
1641 if (net_debug > 5)
1642 printk("%s: receiving %d DMA frames\n", dev->name, count);
1643 if (net_debug > 2 && count >1)
1644 printk("%s: receiving %d DMA frames\n", dev->name, count);
1645 dma_rx(dev);
1646 if (--count == 0)
1647 count = readreg(dev, PP_DmaFrameCnt);
1648 if (net_debug > 2 && count > 0)
1649 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1650 }
1651 }
1652 #endif
1653 break;
1654 case ISQ_RX_MISS_EVENT:
1655 lp->stats.rx_missed_errors += (status >>6);
1656 break;
1657 case ISQ_TX_COL_EVENT:
1658 lp->stats.collisions += (status >>6);
1659 break;
1660 }
1661 }
1662 return IRQ_RETVAL(handled);
1663 }
1664
1665 static void
1666 count_rx_errors(int status, struct net_local *lp)
1667 {
1668 lp->stats.rx_errors++;
1669 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1670 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1671 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1672 /* per str 172 */
1673 lp->stats.rx_crc_errors++;
1674 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1675 return;
1676 }
1677
1678 /* We have a good packet(s), get it/them out of the buffers. */
1679 static void
1680 net_rx(struct net_device *dev)
1681 {
1682 struct net_local *lp = netdev_priv(dev);
1683 struct sk_buff *skb;
1684 int status, length;
1685
1686 int ioaddr = dev->base_addr;
1687 status = readword(ioaddr, RX_FRAME_PORT);
1688 length = readword(ioaddr, RX_FRAME_PORT);
1689
1690 if ((status & RX_OK) == 0) {
1691 count_rx_errors(status, lp);
1692 return;
1693 }
1694
1695 /* Malloc up new buffer. */
1696 skb = dev_alloc_skb(length + 2);
1697 if (skb == NULL) {
1698 #if 0 /* Again, this seems a cruel thing to do */
1699 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1700 #endif
1701 lp->stats.rx_dropped++;
1702 return;
1703 }
1704 skb_reserve(skb, 2); /* longword align L3 header */
1705
1706 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1707 if (length & 1)
1708 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1709
1710 if (net_debug > 3) {
1711 printk( "%s: received %d byte packet of type %x\n",
1712 dev->name, length,
1713 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1714 }
1715
1716 skb->protocol=eth_type_trans(skb,dev);
1717 netif_rx(skb);
1718 lp->stats.rx_packets++;
1719 lp->stats.rx_bytes += length;
1720 }
1721
1722 #if ALLOW_DMA
1723 static void release_dma_buff(struct net_local *lp)
1724 {
1725 if (lp->dma_buff) {
1726 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1727 lp->dma_buff = NULL;
1728 }
1729 }
1730 #endif
1731
1732 /* The inverse routine to net_open(). */
1733 static int
1734 net_close(struct net_device *dev)
1735 {
1736 #if ALLOW_DMA
1737 struct net_local *lp = netdev_priv(dev);
1738 #endif
1739
1740 netif_stop_queue(dev);
1741
1742 writereg(dev, PP_RxCFG, 0);
1743 writereg(dev, PP_TxCFG, 0);
1744 writereg(dev, PP_BufCFG, 0);
1745 writereg(dev, PP_BusCTL, 0);
1746
1747 free_irq(dev->irq, dev);
1748
1749 #if ALLOW_DMA
1750 if (lp->use_dma && lp->dma) {
1751 free_dma(dev->dma);
1752 release_dma_buff(lp);
1753 }
1754 #endif
1755
1756 /* Update the statistics here. */
1757 return 0;
1758 }
1759
1760 /* Get the current statistics. This may be called with the card open or
1761 closed. */
1762 static struct net_device_stats *
1763 net_get_stats(struct net_device *dev)
1764 {
1765 struct net_local *lp = netdev_priv(dev);
1766 unsigned long flags;
1767
1768 spin_lock_irqsave(&lp->lock, flags);
1769 /* Update the statistics from the device registers. */
1770 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1771 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1772 spin_unlock_irqrestore(&lp->lock, flags);
1773
1774 return &lp->stats;
1775 }
1776
1777 static void set_multicast_list(struct net_device *dev)
1778 {
1779 struct net_local *lp = netdev_priv(dev);
1780 unsigned long flags;
1781
1782 spin_lock_irqsave(&lp->lock, flags);
1783 if(dev->flags&IFF_PROMISC)
1784 {
1785 lp->rx_mode = RX_ALL_ACCEPT;
1786 }
1787 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
1788 {
1789 /* The multicast-accept list is initialized to accept-all, and we
1790 rely on higher-level filtering for now. */
1791 lp->rx_mode = RX_MULTCAST_ACCEPT;
1792 }
1793 else
1794 lp->rx_mode = 0;
1795
1796 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1797
1798 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1799 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1800 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1801 spin_unlock_irqrestore(&lp->lock, flags);
1802 }
1803
1804
1805 static int set_mac_address(struct net_device *dev, void *p)
1806 {
1807 int i;
1808 struct sockaddr *addr = p;
1809
1810 if (netif_running(dev))
1811 return -EBUSY;
1812
1813 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1814
1815 if (net_debug)
1816 printk("%s: Setting MAC address to %pM.\n",
1817 dev->name, dev->dev_addr);
1818
1819 /* set the Ethernet address */
1820 for (i=0; i < ETH_ALEN/2; i++)
1821 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1822
1823 return 0;
1824 }
1825
1826 #ifdef MODULE
1827
1828 static struct net_device *dev_cs89x0;
1829
1830 /*
1831 * Support the 'debug' module parm even if we're compiled for non-debug to
1832 * avoid breaking someone's startup scripts
1833 */
1834
1835 static int io;
1836 static int irq;
1837 static int debug;
1838 static char media[8];
1839 static int duplex=-1;
1840
1841 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1842 static int dma;
1843 static int dmasize=16; /* or 64 */
1844
1845 module_param(io, int, 0);
1846 module_param(irq, int, 0);
1847 module_param(debug, int, 0);
1848 module_param_string(media, media, sizeof(media), 0);
1849 module_param(duplex, int, 0);
1850 module_param(dma , int, 0);
1851 module_param(dmasize , int, 0);
1852 module_param(use_dma , int, 0);
1853 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1854 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1855 #if DEBUGGING
1856 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1857 #else
1858 MODULE_PARM_DESC(debug, "(ignored)");
1859 #endif
1860 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1861 /* No other value than -1 for duplex seems to be currently interpreted */
1862 MODULE_PARM_DESC(duplex, "(ignored)");
1863 #if ALLOW_DMA
1864 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1865 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1866 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1867 #else
1868 MODULE_PARM_DESC(dma , "(ignored)");
1869 MODULE_PARM_DESC(dmasize , "(ignored)");
1870 MODULE_PARM_DESC(use_dma , "(ignored)");
1871 #endif
1872
1873 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1874 MODULE_LICENSE("GPL");
1875
1876
1877 /*
1878 * media=t - specify media type
1879 or media=2
1880 or media=aui
1881 or medai=auto
1882 * duplex=0 - specify forced half/full/autonegotiate duplex
1883 * debug=# - debug level
1884
1885
1886 * Default Chip Configuration:
1887 * DMA Burst = enabled
1888 * IOCHRDY Enabled = enabled
1889 * UseSA = enabled
1890 * CS8900 defaults to half-duplex if not specified on command-line
1891 * CS8920 defaults to autoneg if not specified on command-line
1892 * Use reset defaults for other config parameters
1893
1894 * Assumptions:
1895 * media type specified is supported (circuitry is present)
1896 * if memory address is > 1MB, then required mem decode hw is present
1897 * if 10B-2, then agent other than driver will enable DC/DC converter
1898 (hw or software util)
1899
1900
1901 */
1902
1903 int __init init_module(void)
1904 {
1905 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1906 struct net_local *lp;
1907 int ret = 0;
1908
1909 #if DEBUGGING
1910 net_debug = debug;
1911 #else
1912 debug = 0;
1913 #endif
1914 if (!dev)
1915 return -ENOMEM;
1916
1917 dev->irq = irq;
1918 dev->base_addr = io;
1919 lp = netdev_priv(dev);
1920
1921 #if ALLOW_DMA
1922 if (use_dma) {
1923 lp->use_dma = use_dma;
1924 lp->dma = dma;
1925 lp->dmasize = dmasize;
1926 }
1927 #endif
1928
1929 spin_lock_init(&lp->lock);
1930
1931 /* boy, they'd better get these right */
1932 if (!strcmp(media, "rj45"))
1933 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1934 else if (!strcmp(media, "aui"))
1935 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1936 else if (!strcmp(media, "bnc"))
1937 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1938 else
1939 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1940
1941 if (duplex==-1)
1942 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1943
1944 if (io == 0) {
1945 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1946 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1947 ret = -EPERM;
1948 goto out;
1949 } else if (io <= 0x1ff) {
1950 ret = -ENXIO;
1951 goto out;
1952 }
1953
1954 #if ALLOW_DMA
1955 if (use_dma && dmasize != 16 && dmasize != 64) {
1956 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1957 ret = -EPERM;
1958 goto out;
1959 }
1960 #endif
1961 ret = cs89x0_probe1(dev, io, 1);
1962 if (ret)
1963 goto out;
1964
1965 dev_cs89x0 = dev;
1966 return 0;
1967 out:
1968 free_netdev(dev);
1969 return ret;
1970 }
1971
1972 void __exit
1973 cleanup_module(void)
1974 {
1975 unregister_netdev(dev_cs89x0);
1976 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1977 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1978 free_netdev(dev_cs89x0);
1979 }
1980 #endif /* MODULE */
1981
1982 /*
1983 * Local variables:
1984 * version-control: t
1985 * kept-new-versions: 5
1986 * c-indent-level: 8
1987 * tab-width: 8
1988 * End:
1989 *
1990 */
Linux kernel - Deliverables
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