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memcg: make page->mapping NULL before uncharge
[linux-2.6/mini2440.git] / drivers / net / cs89x0.c
blob7107620f615dfd0d17bef1b06fce245ef12411f0
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/slab.h>
142 #include <linux/spinlock.h>
143 #include <linux/string.h>
144 #include <linux/init.h>
145 #include <linux/bitops.h>
146 #include <linux/delay.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 #ifdef CONFIG_ARCH_CLPS7500
174 static unsigned int netcard_portlist[] __used __initdata =
175 { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
176 static unsigned int cs8900_irq_map[] = {12,0,0,0};
177 #elif defined(CONFIG_SH_HICOSH4)
178 static unsigned int netcard_portlist[] __used __initdata =
179 { 0x0300, 0};
180 static unsigned int cs8900_irq_map[] = {1,0,0,0};
181 #elif defined(CONFIG_MACH_IXDP2351)
182 static unsigned int netcard_portlist[] __used __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
183 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
184 #include <asm/irq.h>
185 #elif defined(CONFIG_ARCH_IXDP2X01)
186 #include <asm/irq.h>
187 static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
188 static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
189 #elif defined(CONFIG_ARCH_PNX010X)
190 #include <asm/irq.h>
191 #include <mach/gpio.h>
192 #define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
193 #define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
194 static unsigned int netcard_portlist[] __used __initdata = {CIRRUS_DEFAULT_BASE, 0};
195 static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
196 #elif defined(CONFIG_MACH_MX31ADS)
197 #include <mach/board-mx31ads.h>
198 static unsigned int netcard_portlist[] __used __initdata = {
199 PBC_BASE_ADDRESS + PBC_CS8900A_IOBASE + 0x300, 0
200 };
201 static unsigned cs8900_irq_map[] = {EXPIO_INT_ENET_INT, 0, 0, 0};
202 #else
203 static unsigned int netcard_portlist[] __used __initdata =
204 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
205 static unsigned int cs8900_irq_map[] = {10,11,12,5};
206 #endif
207
208 #if DEBUGGING
209 static unsigned int net_debug = DEBUGGING;
210 #else
211 #define net_debug 0 /* gcc will remove all the debug code for us */
212 #endif
213
214 /* The number of low I/O ports used by the ethercard. */
215 #define NETCARD_IO_EXTENT 16
216
217 /* we allow the user to override various values normally set in the EEPROM */
218 #define FORCE_RJ45 0x0001 /* pick one of these three */
219 #define FORCE_AUI 0x0002
220 #define FORCE_BNC 0x0004
221
222 #define FORCE_AUTO 0x0010 /* pick one of these three */
223 #define FORCE_HALF 0x0020
224 #define FORCE_FULL 0x0030
225
226 /* Information that need to be kept for each board. */
227 struct net_local {
228 struct net_device_stats stats;
229 int chip_type; /* one of: CS8900, CS8920, CS8920M */
230 char chip_revision; /* revision letter of the chip ('A'...) */
231 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
232 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
233 int adapter_cnf; /* adapter configuration from EEPROM */
234 int isa_config; /* ISA configuration from EEPROM */
235 int irq_map; /* IRQ map from EEPROM */
236 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
237 int curr_rx_cfg; /* a copy of PP_RxCFG */
238 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
239 int send_underrun; /* keep track of how many underruns in a row we get */
240 int force; /* force various values; see FORCE* above. */
241 spinlock_t lock;
242 #if ALLOW_DMA
243 int use_dma; /* Flag: we're using dma */
244 int dma; /* DMA channel */
245 int dmasize; /* 16 or 64 */
246 unsigned char *dma_buff; /* points to the beginning of the buffer */
247 unsigned char *end_dma_buff; /* points to the end of the buffer */
248 unsigned char *rx_dma_ptr; /* points to the next packet */
249 #endif
250 };
251
252 /* Index to functions, as function prototypes. */
253
254 static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
255 static int net_open(struct net_device *dev);
256 static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
257 static irqreturn_t net_interrupt(int irq, void *dev_id);
258 static void set_multicast_list(struct net_device *dev);
259 static void net_timeout(struct net_device *dev);
260 static void net_rx(struct net_device *dev);
261 static int net_close(struct net_device *dev);
262 static struct net_device_stats *net_get_stats(struct net_device *dev);
263 static void reset_chip(struct net_device *dev);
264 static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
265 static int get_eeprom_cksum(int off, int len, int *buffer);
266 static int set_mac_address(struct net_device *dev, void *addr);
267 static void count_rx_errors(int status, struct net_local *lp);
268 #ifdef CONFIG_NET_POLL_CONTROLLER
269 static void net_poll_controller(struct net_device *dev);
270 #endif
271 #if ALLOW_DMA
272 static void get_dma_channel(struct net_device *dev);
273 static void release_dma_buff(struct net_local *lp);
274 #endif
275
276 /* Example routines you must write ;->. */
277 #define tx_done(dev) 1
278
279 /*
280 * Permit 'cs89x0_dma=N' in the kernel boot environment
281 */
282 #if !defined(MODULE) && (ALLOW_DMA != 0)
283 static int g_cs89x0_dma;
284
285 static int __init dma_fn(char *str)
286 {
287 g_cs89x0_dma = simple_strtol(str,NULL,0);
288 return 1;
289 }
290
291 __setup("cs89x0_dma=", dma_fn);
292 #endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
293
294 #ifndef MODULE
295 static int g_cs89x0_media__force;
296
297 static int __init media_fn(char *str)
298 {
299 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
300 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
301 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
302 return 1;
303 }
304
305 __setup("cs89x0_media=", media_fn);
306
307
308 /* Check for a network adaptor of this type, and return '0' iff one exists.
309 If dev->base_addr == 0, probe all likely locations.
310 If dev->base_addr == 1, always return failure.
311 If dev->base_addr == 2, allocate space for the device and return success
312 (detachable devices only).
313 Return 0 on success.
314 */
315
316 struct net_device * __init cs89x0_probe(int unit)
317 {
318 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
319 unsigned *port;
320 int err = 0;
321 int irq;
322 int io;
323
324 if (!dev)
325 return ERR_PTR(-ENODEV);
326
327 sprintf(dev->name, "eth%d", unit);
328 netdev_boot_setup_check(dev);
329 io = dev->base_addr;
330 irq = dev->irq;
331
332 if (net_debug)
333 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
334
335 if (io > 0x1ff) { /* Check a single specified location. */
336 err = cs89x0_probe1(dev, io, 0);
337 } else if (io != 0) { /* Don't probe at all. */
338 err = -ENXIO;
339 } else {
340 for (port = netcard_portlist; *port; port++) {
341 if (cs89x0_probe1(dev, *port, 0) == 0)
342 break;
343 dev->irq = irq;
344 }
345 if (!*port)
346 err = -ENODEV;
347 }
348 if (err)
349 goto out;
350 return dev;
351 out:
352 free_netdev(dev);
353 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
354 return ERR_PTR(err);
355 }
356 #endif
357
358 #if defined(CONFIG_MACH_IXDP2351)
359 static u16
360 readword(unsigned long base_addr, int portno)
361 {
362 return __raw_readw(base_addr + (portno << 1));
363 }
364
365 static void
366 writeword(unsigned long base_addr, int portno, u16 value)
367 {
368 __raw_writew(value, base_addr + (portno << 1));
369 }
370 #elif defined(CONFIG_ARCH_IXDP2X01)
371 static u16
372 readword(unsigned long base_addr, int portno)
373 {
374 return __raw_readl(base_addr + (portno << 1));
375 }
376
377 static void
378 writeword(unsigned long base_addr, int portno, u16 value)
379 {
380 __raw_writel(value, base_addr + (portno << 1));
381 }
382 #elif defined(CONFIG_ARCH_PNX010X)
383 static u16
384 readword(unsigned long base_addr, int portno)
385 {
386 return inw(base_addr + (portno << 1));
387 }
388
389 static void
390 writeword(unsigned long base_addr, int portno, u16 value)
391 {
392 outw(value, base_addr + (portno << 1));
393 }
394 #else
395 static u16
396 readword(unsigned long base_addr, int portno)
397 {
398 return inw(base_addr + portno);
399 }
400
401 static void
402 writeword(unsigned long base_addr, int portno, u16 value)
403 {
404 outw(value, base_addr + portno);
405 }
406 #endif
407
408 static void
409 readwords(unsigned long base_addr, int portno, void *buf, int length)
410 {
411 u8 *buf8 = (u8 *)buf;
412
413 do {
414 u16 tmp16;
415
416 tmp16 = readword(base_addr, portno);
417 *buf8++ = (u8)tmp16;
418 *buf8++ = (u8)(tmp16 >> 8);
419 } while (--length);
420 }
421
422 static void
423 writewords(unsigned long base_addr, int portno, void *buf, int length)
424 {
425 u8 *buf8 = (u8 *)buf;
426
427 do {
428 u16 tmp16;
429
430 tmp16 = *buf8++;
431 tmp16 |= (*buf8++) << 8;
432 writeword(base_addr, portno, tmp16);
433 } while (--length);
434 }
435
436 static u16
437 readreg(struct net_device *dev, u16 regno)
438 {
439 writeword(dev->base_addr, ADD_PORT, regno);
440 return readword(dev->base_addr, DATA_PORT);
441 }
442
443 static void
444 writereg(struct net_device *dev, u16 regno, u16 value)
445 {
446 writeword(dev->base_addr, ADD_PORT, regno);
447 writeword(dev->base_addr, DATA_PORT, value);
448 }
449
450 static int __init
451 wait_eeprom_ready(struct net_device *dev)
452 {
453 int timeout = jiffies;
454 /* check to see if the EEPROM is ready, a timeout is used -
455 just in case EEPROM is ready when SI_BUSY in the
456 PP_SelfST is clear */
457 while(readreg(dev, PP_SelfST) & SI_BUSY)
458 if (jiffies - timeout >= 40)
459 return -1;
460 return 0;
461 }
462
463 static int __init
464 get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
465 {
466 int i;
467
468 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
469 for (i = 0; i < len; i++) {
470 if (wait_eeprom_ready(dev) < 0) return -1;
471 /* Now send the EEPROM read command and EEPROM location to read */
472 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
473 if (wait_eeprom_ready(dev) < 0) return -1;
474 buffer[i] = readreg(dev, PP_EEData);
475 if (net_debug > 3) printk("%04x ", buffer[i]);
476 }
477 if (net_debug > 3) printk("\n");
478 return 0;
479 }
480
481 static int __init
482 get_eeprom_cksum(int off, int len, int *buffer)
483 {
484 int i, cksum;
485
486 cksum = 0;
487 for (i = 0; i < len; i++)
488 cksum += buffer[i];
489 cksum &= 0xffff;
490 if (cksum == 0)
491 return 0;
492 return -1;
493 }
494
495 #ifdef CONFIG_NET_POLL_CONTROLLER
496 /*
497 * Polling receive - used by netconsole and other diagnostic tools
498 * to allow network i/o with interrupts disabled.
499 */
500 static void net_poll_controller(struct net_device *dev)
501 {
502 disable_irq(dev->irq);
503 net_interrupt(dev->irq, dev);
504 enable_irq(dev->irq);
505 }
506 #endif
507
508 /* This is the real probe routine. Linux has a history of friendly device
509 probes on the ISA bus. A good device probes avoids doing writes, and
510 verifies that the correct device exists and functions.
511 Return 0 on success.
512 */
513
514 static int __init
515 cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
516 {
517 struct net_local *lp = netdev_priv(dev);
518 static unsigned version_printed;
519 int i;
520 int tmp;
521 unsigned rev_type = 0;
522 int eeprom_buff[CHKSUM_LEN];
523 int retval;
524 DECLARE_MAC_BUF(mac);
525
526 /* Initialize the device structure. */
527 if (!modular) {
528 memset(lp, 0, sizeof(*lp));
529 spin_lock_init(&lp->lock);
530 #ifndef MODULE
531 #if ALLOW_DMA
532 if (g_cs89x0_dma) {
533 lp->use_dma = 1;
534 lp->dma = g_cs89x0_dma;
535 lp->dmasize = 16; /* Could make this an option... */
536 }
537 #endif
538 lp->force = g_cs89x0_media__force;
539 #endif
540 }
541
542 #ifdef CONFIG_ARCH_PNX010X
543 initialize_ebi();
544
545 /* Map GPIO registers for the pins connected to the CS8900a. */
546 if (map_cirrus_gpio() < 0)
547 return -ENODEV;
548
549 reset_cirrus();
550
551 /* Map event-router registers. */
552 if (map_event_router() < 0)
553 return -ENODEV;
554
555 enable_cirrus_irq();
556
557 unmap_cirrus_gpio();
558 unmap_event_router();
559
560 dev->base_addr = ioaddr;
561
562 for (i = 0 ; i < 3 ; i++)
563 readreg(dev, 0);
564 #endif
565
566 /* Grab the region so we can find another board if autoIRQ fails. */
567 /* WTF is going on here? */
568 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
569 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
570 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
571 retval = -EBUSY;
572 goto out1;
573 }
574
575 #ifdef CONFIG_SH_HICOSH4
576 /* truely reset the chip */
577 writeword(ioaddr, ADD_PORT, 0x0114);
578 writeword(ioaddr, DATA_PORT, 0x0040);
579 #endif
580
581 /* if they give us an odd I/O address, then do ONE write to
582 the address port, to get it back to address zero, where we
583 expect to find the EISA signature word. An IO with a base of 0x3
584 will skip the test for the ADD_PORT. */
585 if (ioaddr & 1) {
586 if (net_debug > 1)
587 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
588 if ((ioaddr & 2) != 2)
589 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
590 printk(KERN_ERR "%s: bad signature 0x%x\n",
591 dev->name, readword(ioaddr & ~3, ADD_PORT));
592 retval = -ENODEV;
593 goto out2;
594 }
595 }
596
597 ioaddr &= ~3;
598 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
599 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
600 writeword(ioaddr, ADD_PORT, PP_ChipID);
601
602 tmp = readword(ioaddr, DATA_PORT);
603 if (tmp != CHIP_EISA_ID_SIG) {
604 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
605 CHIP_EISA_ID_SIG_STR "\n",
606 dev->name, ioaddr, DATA_PORT, tmp);
607 retval = -ENODEV;
608 goto out2;
609 }
610
611 /* Fill in the 'dev' fields. */
612 dev->base_addr = ioaddr;
613
614 /* get the chip type */
615 rev_type = readreg(dev, PRODUCT_ID_ADD);
616 lp->chip_type = rev_type &~ REVISON_BITS;
617 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
618
619 /* Check the chip type and revision in order to set the correct send command
620 CS8920 revision C and CS8900 revision F can use the faster send. */
621 lp->send_cmd = TX_AFTER_381;
622 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
623 lp->send_cmd = TX_NOW;
624 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
625 lp->send_cmd = TX_NOW;
626
627 if (net_debug && version_printed++ == 0)
628 printk(version);
629
630 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
631 dev->name,
632 lp->chip_type==CS8900?'0':'2',
633 lp->chip_type==CS8920M?"M":"",
634 lp->chip_revision,
635 dev->base_addr);
636
637 reset_chip(dev);
638
639 /* Here we read the current configuration of the chip. If there
640 is no Extended EEPROM then the idea is to not disturb the chip
641 configuration, it should have been correctly setup by automatic
642 EEPROM read on reset. So, if the chip says it read the EEPROM
643 the driver will always do *something* instead of complain that
644 adapter_cnf is 0. */
645
646 #ifdef CONFIG_SH_HICOSH4
647 if (1) {
648 /* For the HiCO.SH4 board, things are different: we don't
649 have EEPROM, but there is some data in flash, so we go
650 get it there directly (MAC). */
651 __u16 *confd;
652 short cnt;
653 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
654 == 0x006c3000) {
655 confd = (__u16*) 0xa0013fc0;
656 } else {
657 confd = (__u16*) 0xa001ffc0;
658 }
659 cnt = (*confd++ & 0x00ff) >> 1;
660 while (--cnt > 0) {
661 __u16 j = *confd++;
662
663 switch (j & 0x0fff) {
664 case PP_IA:
665 for (i = 0; i < ETH_ALEN/2; i++) {
666 dev->dev_addr[i*2] = confd[i] & 0xFF;
667 dev->dev_addr[i*2+1] = confd[i] >> 8;
668 }
669 break;
670 }
671 j = (j >> 12) + 1;
672 confd += j;
673 cnt -= j;
674 }
675 } else
676 #endif
677
678 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
679 (EEPROM_OK|EEPROM_PRESENT)) {
680 /* Load the MAC. */
681 for (i=0; i < ETH_ALEN/2; i++) {
682 unsigned int Addr;
683 Addr = readreg(dev, PP_IA+i*2);
684 dev->dev_addr[i*2] = Addr & 0xFF;
685 dev->dev_addr[i*2+1] = Addr >> 8;
686 }
687
688 /* Load the Adapter Configuration.
689 Note: Barring any more specific information from some
690 other source (ie EEPROM+Schematics), we would not know
691 how to operate a 10Base2 interface on the AUI port.
692 However, since we do read the status of HCB1 and use
693 settings that always result in calls to control_dc_dc(dev,0)
694 a BNC interface should work if the enable pin
695 (dc/dc converter) is on HCB1. It will be called AUI
696 however. */
697
698 lp->adapter_cnf = 0;
699 i = readreg(dev, PP_LineCTL);
700 /* Preserve the setting of the HCB1 pin. */
701 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
702 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
703 /* Save the sqelch bit */
704 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
705 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
706 /* Check if the card is in 10Base-t only mode */
707 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
708 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
709 /* Check if the card is in AUI only mode */
710 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
711 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
712 /* Check if the card is in Auto mode. */
713 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
714 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
715 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
716
717 if (net_debug > 1)
718 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
719 dev->name, i, lp->adapter_cnf);
720
721 /* IRQ. Other chips already probe, see below. */
722 if (lp->chip_type == CS8900)
723 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
724
725 printk( "[Cirrus EEPROM] ");
726 }
727
728 printk("\n");
729
730 /* First check to see if an EEPROM is attached. */
731 #ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
732 if (1) {
733 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
734 } else
735 #endif
736 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
737 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
738 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
739 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
740 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
741 /* Check if the chip was able to read its own configuration starting
742 at 0 in the EEPROM*/
743 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
744 (EEPROM_OK|EEPROM_PRESENT))
745 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
746
747 } else {
748 /* This reads an extended EEPROM that is not documented
749 in the CS8900 datasheet. */
750
751 /* get transmission control word but keep the autonegotiation bits */
752 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
753 /* Store adapter configuration */
754 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
755 /* Store ISA configuration */
756 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
757 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
758
759 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
760 /* store the initial memory base address */
761 for (i = 0; i < ETH_ALEN/2; i++) {
762 dev->dev_addr[i*2] = eeprom_buff[i];
763 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
764 }
765 if (net_debug > 1)
766 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
767 dev->name, lp->adapter_cnf);
768 }
769
770 /* allow them to force multiple transceivers. If they force multiple, autosense */
771 {
772 int count = 0;
773 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
774 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
775 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
776 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
777 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
778 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
779 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
780 }
781
782 if (net_debug > 1)
783 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
784 dev->name, lp->force, lp->adapter_cnf);
785
786 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
787
788 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
789
790 /* FIXME: we don't set the Ethernet address on the command line. Use
791 ifconfig IFACE hw ether AABBCCDDEEFF */
792
793 printk(KERN_INFO "cs89x0 media %s%s%s",
794 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
795 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
796 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
797
798 lp->irq_map = 0xffff;
799
800 /* If this is a CS8900 then no pnp soft */
801 if (lp->chip_type != CS8900 &&
802 /* Check if the ISA IRQ has been set */
803 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
804 (i != 0 && i < CS8920_NO_INTS))) {
805 if (!dev->irq)
806 dev->irq = i;
807 } else {
808 i = lp->isa_config & INT_NO_MASK;
809 if (lp->chip_type == CS8900) {
810 #ifdef CONFIG_CS89x0_NONISA_IRQ
811 i = cs8900_irq_map[0];
812 #else
813 /* Translate the IRQ using the IRQ mapping table. */
814 if (i >= ARRAY_SIZE(cs8900_irq_map))
815 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
816 else
817 i = cs8900_irq_map[i];
818
819 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
820 } else {
821 int irq_map_buff[IRQ_MAP_LEN/2];
822
823 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
824 IRQ_MAP_LEN/2,
825 irq_map_buff) >= 0) {
826 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
827 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
828 }
829 #endif
830 }
831 if (!dev->irq)
832 dev->irq = i;
833 }
834
835 printk(" IRQ %d", dev->irq);
836
837 #if ALLOW_DMA
838 if (lp->use_dma) {
839 get_dma_channel(dev);
840 printk(", DMA %d", dev->dma);
841 }
842 else
843 #endif
844 {
845 printk(", programmed I/O");
846 }
847
848 /* print the ethernet address. */
849 printk(", MAC %s", print_mac(mac, dev->dev_addr));
850
851 dev->open = net_open;
852 dev->stop = net_close;
853 dev->tx_timeout = net_timeout;
854 dev->watchdog_timeo = HZ;
855 dev->hard_start_xmit = net_send_packet;
856 dev->get_stats = net_get_stats;
857 dev->set_multicast_list = set_multicast_list;
858 dev->set_mac_address = set_mac_address;
859 #ifdef CONFIG_NET_POLL_CONTROLLER
860 dev->poll_controller = net_poll_controller;
861 #endif
862
863 printk("\n");
864 if (net_debug)
865 printk("cs89x0_probe1() successful\n");
866
867 retval = register_netdev(dev);
868 if (retval)
869 goto out3;
870 return 0;
871 out3:
872 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
873 out2:
874 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
875 out1:
876 return retval;
877 }
878
879
880 /*********************************
881 * This page contains DMA routines
882 **********************************/
883
884 #if ALLOW_DMA
885
886 #define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
887
888 static void
889 get_dma_channel(struct net_device *dev)
890 {
891 struct net_local *lp = netdev_priv(dev);
892
893 if (lp->dma) {
894 dev->dma = lp->dma;
895 lp->isa_config |= ISA_RxDMA;
896 } else {
897 if ((lp->isa_config & ANY_ISA_DMA) == 0)
898 return;
899 dev->dma = lp->isa_config & DMA_NO_MASK;
900 if (lp->chip_type == CS8900)
901 dev->dma += 5;
902 if (dev->dma < 5 || dev->dma > 7) {
903 lp->isa_config &= ~ANY_ISA_DMA;
904 return;
905 }
906 }
907 return;
908 }
909
910 static void
911 write_dma(struct net_device *dev, int chip_type, int dma)
912 {
913 struct net_local *lp = netdev_priv(dev);
914 if ((lp->isa_config & ANY_ISA_DMA) == 0)
915 return;
916 if (chip_type == CS8900) {
917 writereg(dev, PP_CS8900_ISADMA, dma-5);
918 } else {
919 writereg(dev, PP_CS8920_ISADMA, dma);
920 }
921 }
922
923 static void
924 set_dma_cfg(struct net_device *dev)
925 {
926 struct net_local *lp = netdev_priv(dev);
927
928 if (lp->use_dma) {
929 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
930 if (net_debug > 3)
931 printk("set_dma_cfg(): no DMA\n");
932 return;
933 }
934 if (lp->isa_config & ISA_RxDMA) {
935 lp->curr_rx_cfg |= RX_DMA_ONLY;
936 if (net_debug > 3)
937 printk("set_dma_cfg(): RX_DMA_ONLY\n");
938 } else {
939 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
940 if (net_debug > 3)
941 printk("set_dma_cfg(): AUTO_RX_DMA\n");
942 }
943 }
944 }
945
946 static int
947 dma_bufcfg(struct net_device *dev)
948 {
949 struct net_local *lp = netdev_priv(dev);
950 if (lp->use_dma)
951 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
952 else
953 return 0;
954 }
955
956 static int
957 dma_busctl(struct net_device *dev)
958 {
959 int retval = 0;
960 struct net_local *lp = netdev_priv(dev);
961 if (lp->use_dma) {
962 if (lp->isa_config & ANY_ISA_DMA)
963 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
964 if (lp->isa_config & DMA_BURST)
965 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
966 if (lp->dmasize == 64)
967 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
968 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
969 }
970 return retval;
971 }
972
973 static void
974 dma_rx(struct net_device *dev)
975 {
976 struct net_local *lp = netdev_priv(dev);
977 struct sk_buff *skb;
978 int status, length;
979 unsigned char *bp = lp->rx_dma_ptr;
980
981 status = bp[0] + (bp[1]<<8);
982 length = bp[2] + (bp[3]<<8);
983 bp += 4;
984 if (net_debug > 5) {
985 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
986 dev->name, (unsigned long)bp, status, length);
987 }
988 if ((status & RX_OK) == 0) {
989 count_rx_errors(status, lp);
990 goto skip_this_frame;
991 }
992
993 /* Malloc up new buffer. */
994 skb = dev_alloc_skb(length + 2);
995 if (skb == NULL) {
996 if (net_debug) /* I don't think we want to do this to a stressed system */
997 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
998 lp->stats.rx_dropped++;
999
1000 /* AKPM: advance bp to the next frame */
1001 skip_this_frame:
1002 bp += (length + 3) & ~3;
1003 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1004 lp->rx_dma_ptr = bp;
1005 return;
1006 }
1007 skb_reserve(skb, 2); /* longword align L3 header */
1008
1009 if (bp + length > lp->end_dma_buff) {
1010 int semi_cnt = lp->end_dma_buff - bp;
1011 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1012 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1013 length - semi_cnt);
1014 } else {
1015 memcpy(skb_put(skb,length), bp, length);
1016 }
1017 bp += (length + 3) & ~3;
1018 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1019 lp->rx_dma_ptr = bp;
1020
1021 if (net_debug > 3) {
1022 printk( "%s: received %d byte DMA packet of type %x\n",
1023 dev->name, length,
1024 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1025 }
1026 skb->protocol=eth_type_trans(skb,dev);
1027 netif_rx(skb);
1028 dev->last_rx = jiffies;
1029 lp->stats.rx_packets++;
1030 lp->stats.rx_bytes += length;
1031 }
1032
1033 #endif /* ALLOW_DMA */
1034
1035 void __init reset_chip(struct net_device *dev)
1036 {
1037 #if !defined(CONFIG_MACH_MX31ADS)
1038 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1039 struct net_local *lp = netdev_priv(dev);
1040 int ioaddr = dev->base_addr;
1041 #endif
1042 int reset_start_time;
1043
1044 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1045
1046 /* wait 30 ms */
1047 msleep(30);
1048
1049 #if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1050 if (lp->chip_type != CS8900) {
1051 /* Hardware problem requires PNP registers to be reconfigured after a reset */
1052 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1053 outb(dev->irq, ioaddr + DATA_PORT);
1054 outb(0, ioaddr + DATA_PORT + 1);
1055
1056 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1057 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1058 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1059 }
1060 #endif /* IXDP2x01 */
1061
1062 /* Wait until the chip is reset */
1063 reset_start_time = jiffies;
1064 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1065 ;
1066 #endif /* !CONFIG_MACH_MX31ADS */
1067 }
1068
1069
1070 static void
1071 control_dc_dc(struct net_device *dev, int on_not_off)
1072 {
1073 struct net_local *lp = netdev_priv(dev);
1074 unsigned int selfcontrol;
1075 int timenow = jiffies;
1076 /* control the DC to DC convertor in the SelfControl register.
1077 Note: This is hooked up to a general purpose pin, might not
1078 always be a DC to DC convertor. */
1079
1080 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1081 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1082 selfcontrol |= HCB1;
1083 else
1084 selfcontrol &= ~HCB1;
1085 writereg(dev, PP_SelfCTL, selfcontrol);
1086
1087 /* Wait for the DC/DC converter to power up - 500ms */
1088 while (jiffies - timenow < HZ)
1089 ;
1090 }
1091
1092 #define DETECTED_NONE 0
1093 #define DETECTED_RJ45H 1
1094 #define DETECTED_RJ45F 2
1095 #define DETECTED_AUI 3
1096 #define DETECTED_BNC 4
1097
1098 static int
1099 detect_tp(struct net_device *dev)
1100 {
1101 struct net_local *lp = netdev_priv(dev);
1102 int timenow = jiffies;
1103 int fdx;
1104
1105 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1106
1107 /* If connected to another full duplex capable 10-Base-T card the link pulses
1108 seem to be lost when the auto detect bit in the LineCTL is set.
1109 To overcome this the auto detect bit will be cleared whilst testing the
1110 10-Base-T interface. This would not be necessary for the sparrow chip but
1111 is simpler to do it anyway. */
1112 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1113 control_dc_dc(dev, 0);
1114
1115 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1116 for (timenow = jiffies; jiffies - timenow < 15; )
1117 ;
1118 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1119 return DETECTED_NONE;
1120
1121 if (lp->chip_type == CS8900) {
1122 switch (lp->force & 0xf0) {
1123 #if 0
1124 case FORCE_AUTO:
1125 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1126 return DETECTED_NONE;
1127 #endif
1128 /* CS8900 doesn't support AUTO, change to HALF*/
1129 case FORCE_AUTO:
1130 lp->force &= ~FORCE_AUTO;
1131 lp->force |= FORCE_HALF;
1132 break;
1133 case FORCE_HALF:
1134 break;
1135 case FORCE_FULL:
1136 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1137 break;
1138 }
1139 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1140 } else {
1141 switch (lp->force & 0xf0) {
1142 case FORCE_AUTO:
1143 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1144 break;
1145 case FORCE_HALF:
1146 lp->auto_neg_cnf = 0;
1147 break;
1148 case FORCE_FULL:
1149 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1150 break;
1151 }
1152
1153 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1154
1155 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1156 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1157 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1158 if (jiffies - timenow > 4000) {
1159 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1160 break;
1161 }
1162 }
1163 }
1164 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1165 }
1166 if (fdx)
1167 return DETECTED_RJ45F;
1168 else
1169 return DETECTED_RJ45H;
1170 }
1171
1172 /* send a test packet - return true if carrier bits are ok */
1173 static int
1174 send_test_pkt(struct net_device *dev)
1175 {
1176 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1177 0, 46, /* A 46 in network order */
1178 0, 0, /* DSAP=0 & SSAP=0 fields */
1179 0xf3, 0 /* Control (Test Req + P bit set) */ };
1180 long timenow = jiffies;
1181
1182 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1183
1184 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1185 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1186
1187 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1188 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1189
1190 /* Test to see if the chip has allocated memory for the packet */
1191 while (jiffies - timenow < 5)
1192 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1193 break;
1194 if (jiffies - timenow >= 5)
1195 return 0; /* this shouldn't happen */
1196
1197 /* Write the contents of the packet */
1198 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1199
1200 if (net_debug > 1) printk("Sending test packet ");
1201 /* wait a couple of jiffies for packet to be received */
1202 for (timenow = jiffies; jiffies - timenow < 3; )
1203 ;
1204 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1205 if (net_debug > 1) printk("succeeded\n");
1206 return 1;
1207 }
1208 if (net_debug > 1) printk("failed\n");
1209 return 0;
1210 }
1211
1212
1213 static int
1214 detect_aui(struct net_device *dev)
1215 {
1216 struct net_local *lp = netdev_priv(dev);
1217
1218 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1219 control_dc_dc(dev, 0);
1220
1221 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1222
1223 if (send_test_pkt(dev))
1224 return DETECTED_AUI;
1225 else
1226 return DETECTED_NONE;
1227 }
1228
1229 static int
1230 detect_bnc(struct net_device *dev)
1231 {
1232 struct net_local *lp = netdev_priv(dev);
1233
1234 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1235 control_dc_dc(dev, 1);
1236
1237 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1238
1239 if (send_test_pkt(dev))
1240 return DETECTED_BNC;
1241 else
1242 return DETECTED_NONE;
1243 }
1244
1245
1246 static void
1247 write_irq(struct net_device *dev, int chip_type, int irq)
1248 {
1249 int i;
1250
1251 if (chip_type == CS8900) {
1252 /* Search the mapping table for the corresponding IRQ pin. */
1253 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1254 if (cs8900_irq_map[i] == irq)
1255 break;
1256 /* Not found */
1257 if (i == ARRAY_SIZE(cs8900_irq_map))
1258 i = 3;
1259 writereg(dev, PP_CS8900_ISAINT, i);
1260 } else {
1261 writereg(dev, PP_CS8920_ISAINT, irq);
1262 }
1263 }
1264
1265 /* Open/initialize the board. This is called (in the current kernel)
1266 sometime after booting when the 'ifconfig' program is run.
1267
1268 This routine should set everything up anew at each open, even
1269 registers that "should" only need to be set once at boot, so that
1270 there is non-reboot way to recover if something goes wrong.
1271 */
1272
1273 /* AKPM: do we need to do any locking here? */
1274
1275 static int
1276 net_open(struct net_device *dev)
1277 {
1278 struct net_local *lp = netdev_priv(dev);
1279 int result = 0;
1280 int i;
1281 int ret;
1282
1283 #if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1284 if (dev->irq < 2) {
1285 /* Allow interrupts to be generated by the chip */
1286 /* Cirrus' release had this: */
1287 #if 0
1288 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1289 #endif
1290 /* And 2.3.47 had this: */
1291 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1292
1293 for (i = 2; i < CS8920_NO_INTS; i++) {
1294 if ((1 << i) & lp->irq_map) {
1295 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1296 dev->irq = i;
1297 write_irq(dev, lp->chip_type, i);
1298 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1299 break;
1300 }
1301 }
1302 }
1303
1304 if (i >= CS8920_NO_INTS) {
1305 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1306 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1307 ret = -EAGAIN;
1308 goto bad_out;
1309 }
1310 }
1311 else
1312 #endif
1313 {
1314 #ifndef CONFIG_CS89x0_NONISA_IRQ
1315 if (((1 << dev->irq) & lp->irq_map) == 0) {
1316 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1317 dev->name, dev->irq, lp->irq_map);
1318 ret = -EAGAIN;
1319 goto bad_out;
1320 }
1321 #endif
1322 /* FIXME: Cirrus' release had this: */
1323 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1324 /* And 2.3.47 had this: */
1325 #if 0
1326 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1327 #endif
1328 write_irq(dev, lp->chip_type, dev->irq);
1329 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1330 if (ret) {
1331 if (net_debug)
1332 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1333 goto bad_out;
1334 }
1335 }
1336
1337 #if ALLOW_DMA
1338 if (lp->use_dma) {
1339 if (lp->isa_config & ANY_ISA_DMA) {
1340 unsigned long flags;
1341 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1342 get_order(lp->dmasize * 1024));
1343
1344 if (!lp->dma_buff) {
1345 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1346 goto release_irq;
1347 }
1348 if (net_debug > 1) {
1349 printk( "%s: dma %lx %lx\n",
1350 dev->name,
1351 (unsigned long)lp->dma_buff,
1352 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1353 }
1354 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1355 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1356 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1357 goto release_irq;
1358 }
1359 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1360 if (request_dma(dev->dma, dev->name)) {
1361 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1362 goto release_irq;
1363 }
1364 write_dma(dev, lp->chip_type, dev->dma);
1365 lp->rx_dma_ptr = lp->dma_buff;
1366 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1367 spin_lock_irqsave(&lp->lock, flags);
1368 disable_dma(dev->dma);
1369 clear_dma_ff(dev->dma);
1370 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1371 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1372 set_dma_count(dev->dma, lp->dmasize*1024);
1373 enable_dma(dev->dma);
1374 spin_unlock_irqrestore(&lp->lock, flags);
1375 }
1376 }
1377 #endif /* ALLOW_DMA */
1378
1379 /* set the Ethernet address */
1380 for (i=0; i < ETH_ALEN/2; i++)
1381 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1382
1383 /* while we're testing the interface, leave interrupts disabled */
1384 writereg(dev, PP_BusCTL, MEMORY_ON);
1385
1386 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1387 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1388 lp->linectl = LOW_RX_SQUELCH;
1389 else
1390 lp->linectl = 0;
1391
1392 /* check to make sure that they have the "right" hardware available */
1393 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1394 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1395 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1396 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1397 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1398 }
1399 #ifdef CONFIG_ARCH_PNX010X
1400 result = A_CNF_10B_T;
1401 #endif
1402 if (!result) {
1403 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
1404 release_dma:
1405 #if ALLOW_DMA
1406 free_dma(dev->dma);
1407 release_irq:
1408 release_dma_buff(lp);
1409 #endif
1410 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1411 free_irq(dev->irq, dev);
1412 ret = -EAGAIN;
1413 goto bad_out;
1414 }
1415
1416 /* set the hardware to the configured choice */
1417 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1418 case A_CNF_MEDIA_10B_T:
1419 result = detect_tp(dev);
1420 if (result==DETECTED_NONE) {
1421 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1422 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1423 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1424 }
1425 break;
1426 case A_CNF_MEDIA_AUI:
1427 result = detect_aui(dev);
1428 if (result==DETECTED_NONE) {
1429 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1430 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1431 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1432 }
1433 break;
1434 case A_CNF_MEDIA_10B_2:
1435 result = detect_bnc(dev);
1436 if (result==DETECTED_NONE) {
1437 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1438 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1439 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1440 }
1441 break;
1442 case A_CNF_MEDIA_AUTO:
1443 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1444 if (lp->adapter_cnf & A_CNF_10B_T)
1445 if ((result = detect_tp(dev)) != DETECTED_NONE)
1446 break;
1447 if (lp->adapter_cnf & A_CNF_AUI)
1448 if ((result = detect_aui(dev)) != DETECTED_NONE)
1449 break;
1450 if (lp->adapter_cnf & A_CNF_10B_2)
1451 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1452 break;
1453 printk(KERN_ERR "%s: no media detected\n", dev->name);
1454 goto release_dma;
1455 }
1456 switch(result) {
1457 case DETECTED_NONE:
1458 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
1459 goto release_dma;
1460 case DETECTED_RJ45H:
1461 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1462 break;
1463 case DETECTED_RJ45F:
1464 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1465 break;
1466 case DETECTED_AUI:
1467 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1468 break;
1469 case DETECTED_BNC:
1470 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1471 break;
1472 }
1473
1474 /* Turn on both receive and transmit operations */
1475 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1476
1477 /* Receive only error free packets addressed to this card */
1478 lp->rx_mode = 0;
1479 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1480
1481 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1482
1483 if (lp->isa_config & STREAM_TRANSFER)
1484 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1485 #if ALLOW_DMA
1486 set_dma_cfg(dev);
1487 #endif
1488 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1489
1490 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1491 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1492
1493 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1494 #if ALLOW_DMA
1495 dma_bufcfg(dev) |
1496 #endif
1497 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1498
1499 /* now that we've got our act together, enable everything */
1500 writereg(dev, PP_BusCTL, ENABLE_IRQ
1501 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1502 #if ALLOW_DMA
1503 | dma_busctl(dev)
1504 #endif
1505 );
1506 netif_start_queue(dev);
1507 if (net_debug > 1)
1508 printk("cs89x0: net_open() succeeded\n");
1509 return 0;
1510 bad_out:
1511 return ret;
1512 }
1513
1514 static void net_timeout(struct net_device *dev)
1515 {
1516 /* If we get here, some higher level has decided we are broken.
1517 There should really be a "kick me" function call instead. */
1518 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1519 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1520 /* Try to restart the adaptor. */
1521 netif_wake_queue(dev);
1522 }
1523
1524 static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1525 {
1526 struct net_local *lp = netdev_priv(dev);
1527
1528 if (net_debug > 3) {
1529 printk("%s: sent %d byte packet of type %x\n",
1530 dev->name, skb->len,
1531 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1532 }
1533
1534 /* keep the upload from being interrupted, since we
1535 ask the chip to start transmitting before the
1536 whole packet has been completely uploaded. */
1537
1538 spin_lock_irq(&lp->lock);
1539 netif_stop_queue(dev);
1540
1541 /* initiate a transmit sequence */
1542 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1543 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1544
1545 /* Test to see if the chip has allocated memory for the packet */
1546 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1547 /*
1548 * Gasp! It hasn't. But that shouldn't happen since
1549 * we're waiting for TxOk, so return 1 and requeue this packet.
1550 */
1551
1552 spin_unlock_irq(&lp->lock);
1553 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1554 return 1;
1555 }
1556 /* Write the contents of the packet */
1557 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1558 spin_unlock_irq(&lp->lock);
1559 lp->stats.tx_bytes += skb->len;
1560 dev->trans_start = jiffies;
1561 dev_kfree_skb (skb);
1562
1563 /*
1564 * We DO NOT call netif_wake_queue() here.
1565 * We also DO NOT call netif_start_queue().
1566 *
1567 * Either of these would cause another bottom half run through
1568 * net_send_packet() before this packet has fully gone out. That causes
1569 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1570 * a dog. We just return and wait for the Tx completion interrupt handler
1571 * to restart the netdevice layer
1572 */
1573
1574 return 0;
1575 }
1576
1577 /* The typical workload of the driver:
1578 Handle the network interface interrupts. */
1579
1580 static irqreturn_t net_interrupt(int irq, void *dev_id)
1581 {
1582 struct net_device *dev = dev_id;
1583 struct net_local *lp;
1584 int ioaddr, status;
1585 int handled = 0;
1586
1587 ioaddr = dev->base_addr;
1588 lp = netdev_priv(dev);
1589
1590 /* we MUST read all the events out of the ISQ, otherwise we'll never
1591 get interrupted again. As a consequence, we can't have any limit
1592 on the number of times we loop in the interrupt handler. The
1593 hardware guarantees that eventually we'll run out of events. Of
1594 course, if you're on a slow machine, and packets are arriving
1595 faster than you can read them off, you're screwed. Hasta la
1596 vista, baby! */
1597 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1598 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1599 handled = 1;
1600 switch(status & ISQ_EVENT_MASK) {
1601 case ISQ_RECEIVER_EVENT:
1602 /* Got a packet(s). */
1603 net_rx(dev);
1604 break;
1605 case ISQ_TRANSMITTER_EVENT:
1606 lp->stats.tx_packets++;
1607 netif_wake_queue(dev); /* Inform upper layers. */
1608 if ((status & ( TX_OK |
1609 TX_LOST_CRS |
1610 TX_SQE_ERROR |
1611 TX_LATE_COL |
1612 TX_16_COL)) != TX_OK) {
1613 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1614 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1615 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1616 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1617 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1618 }
1619 break;
1620 case ISQ_BUFFER_EVENT:
1621 if (status & READY_FOR_TX) {
1622 /* we tried to transmit a packet earlier,
1623 but inexplicably ran out of buffers.
1624 That shouldn't happen since we only ever
1625 load one packet. Shrug. Do the right
1626 thing anyway. */
1627 netif_wake_queue(dev); /* Inform upper layers. */
1628 }
1629 if (status & TX_UNDERRUN) {
1630 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1631 lp->send_underrun++;
1632 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1633 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1634 /* transmit cycle is done, although
1635 frame wasn't transmitted - this
1636 avoids having to wait for the upper
1637 layers to timeout on us, in the
1638 event of a tx underrun */
1639 netif_wake_queue(dev); /* Inform upper layers. */
1640 }
1641 #if ALLOW_DMA
1642 if (lp->use_dma && (status & RX_DMA)) {
1643 int count = readreg(dev, PP_DmaFrameCnt);
1644 while(count) {
1645 if (net_debug > 5)
1646 printk("%s: receiving %d DMA frames\n", dev->name, count);
1647 if (net_debug > 2 && count >1)
1648 printk("%s: receiving %d DMA frames\n", dev->name, count);
1649 dma_rx(dev);
1650 if (--count == 0)
1651 count = readreg(dev, PP_DmaFrameCnt);
1652 if (net_debug > 2 && count > 0)
1653 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1654 }
1655 }
1656 #endif
1657 break;
1658 case ISQ_RX_MISS_EVENT:
1659 lp->stats.rx_missed_errors += (status >>6);
1660 break;
1661 case ISQ_TX_COL_EVENT:
1662 lp->stats.collisions += (status >>6);
1663 break;
1664 }
1665 }
1666 return IRQ_RETVAL(handled);
1667 }
1668
1669 static void
1670 count_rx_errors(int status, struct net_local *lp)
1671 {
1672 lp->stats.rx_errors++;
1673 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1674 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1675 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1676 /* per str 172 */
1677 lp->stats.rx_crc_errors++;
1678 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1679 return;
1680 }
1681
1682 /* We have a good packet(s), get it/them out of the buffers. */
1683 static void
1684 net_rx(struct net_device *dev)
1685 {
1686 struct net_local *lp = netdev_priv(dev);
1687 struct sk_buff *skb;
1688 int status, length;
1689
1690 int ioaddr = dev->base_addr;
1691 status = readword(ioaddr, RX_FRAME_PORT);
1692 length = readword(ioaddr, RX_FRAME_PORT);
1693
1694 if ((status & RX_OK) == 0) {
1695 count_rx_errors(status, lp);
1696 return;
1697 }
1698
1699 /* Malloc up new buffer. */
1700 skb = dev_alloc_skb(length + 2);
1701 if (skb == NULL) {
1702 #if 0 /* Again, this seems a cruel thing to do */
1703 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1704 #endif
1705 lp->stats.rx_dropped++;
1706 return;
1707 }
1708 skb_reserve(skb, 2); /* longword align L3 header */
1709
1710 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1711 if (length & 1)
1712 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1713
1714 if (net_debug > 3) {
1715 printk( "%s: received %d byte packet of type %x\n",
1716 dev->name, length,
1717 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1718 }
1719
1720 skb->protocol=eth_type_trans(skb,dev);
1721 netif_rx(skb);
1722 dev->last_rx = jiffies;
1723 lp->stats.rx_packets++;
1724 lp->stats.rx_bytes += length;
1725 }
1726
1727 #if ALLOW_DMA
1728 static void release_dma_buff(struct net_local *lp)
1729 {
1730 if (lp->dma_buff) {
1731 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1732 lp->dma_buff = NULL;
1733 }
1734 }
1735 #endif
1736
1737 /* The inverse routine to net_open(). */
1738 static int
1739 net_close(struct net_device *dev)
1740 {
1741 #if ALLOW_DMA
1742 struct net_local *lp = netdev_priv(dev);
1743 #endif
1744
1745 netif_stop_queue(dev);
1746
1747 writereg(dev, PP_RxCFG, 0);
1748 writereg(dev, PP_TxCFG, 0);
1749 writereg(dev, PP_BufCFG, 0);
1750 writereg(dev, PP_BusCTL, 0);
1751
1752 free_irq(dev->irq, dev);
1753
1754 #if ALLOW_DMA
1755 if (lp->use_dma && lp->dma) {
1756 free_dma(dev->dma);
1757 release_dma_buff(lp);
1758 }
1759 #endif
1760
1761 /* Update the statistics here. */
1762 return 0;
1763 }
1764
1765 /* Get the current statistics. This may be called with the card open or
1766 closed. */
1767 static struct net_device_stats *
1768 net_get_stats(struct net_device *dev)
1769 {
1770 struct net_local *lp = netdev_priv(dev);
1771 unsigned long flags;
1772
1773 spin_lock_irqsave(&lp->lock, flags);
1774 /* Update the statistics from the device registers. */
1775 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1776 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1777 spin_unlock_irqrestore(&lp->lock, flags);
1778
1779 return &lp->stats;
1780 }
1781
1782 static void set_multicast_list(struct net_device *dev)
1783 {
1784 struct net_local *lp = netdev_priv(dev);
1785 unsigned long flags;
1786
1787 spin_lock_irqsave(&lp->lock, flags);
1788 if(dev->flags&IFF_PROMISC)
1789 {
1790 lp->rx_mode = RX_ALL_ACCEPT;
1791 }
1792 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1793 {
1794 /* The multicast-accept list is initialized to accept-all, and we
1795 rely on higher-level filtering for now. */
1796 lp->rx_mode = RX_MULTCAST_ACCEPT;
1797 }
1798 else
1799 lp->rx_mode = 0;
1800
1801 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1802
1803 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1804 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1805 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1806 spin_unlock_irqrestore(&lp->lock, flags);
1807 }
1808
1809
1810 static int set_mac_address(struct net_device *dev, void *p)
1811 {
1812 int i;
1813 struct sockaddr *addr = p;
1814
1815 if (netif_running(dev))
1816 return -EBUSY;
1817
1818 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1819
1820 if (net_debug) {
1821 DECLARE_MAC_BUF(mac);
1822 printk("%s: Setting MAC address to %s.\n",
1823 dev->name, print_mac(mac, dev->dev_addr));
1824 }
1825 /* set the Ethernet address */
1826 for (i=0; i < ETH_ALEN/2; i++)
1827 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1828
1829 return 0;
1830 }
1831
1832 #ifdef MODULE
1833
1834 static struct net_device *dev_cs89x0;
1835
1836 /*
1837 * Support the 'debug' module parm even if we're compiled for non-debug to
1838 * avoid breaking someone's startup scripts
1839 */
1840
1841 static int io;
1842 static int irq;
1843 static int debug;
1844 static char media[8];
1845 static int duplex=-1;
1846
1847 static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1848 static int dma;
1849 static int dmasize=16; /* or 64 */
1850
1851 module_param(io, int, 0);
1852 module_param(irq, int, 0);
1853 module_param(debug, int, 0);
1854 module_param_string(media, media, sizeof(media), 0);
1855 module_param(duplex, int, 0);
1856 module_param(dma , int, 0);
1857 module_param(dmasize , int, 0);
1858 module_param(use_dma , int, 0);
1859 MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1860 MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1861 #if DEBUGGING
1862 MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1863 #else
1864 MODULE_PARM_DESC(debug, "(ignored)");
1865 #endif
1866 MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1867 /* No other value than -1 for duplex seems to be currently interpreted */
1868 MODULE_PARM_DESC(duplex, "(ignored)");
1869 #if ALLOW_DMA
1870 MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1871 MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1872 MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1873 #else
1874 MODULE_PARM_DESC(dma , "(ignored)");
1875 MODULE_PARM_DESC(dmasize , "(ignored)");
1876 MODULE_PARM_DESC(use_dma , "(ignored)");
1877 #endif
1878
1879 MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1880 MODULE_LICENSE("GPL");
1881
1882
1883 /*
1884 * media=t - specify media type
1885 or media=2
1886 or media=aui
1887 or medai=auto
1888 * duplex=0 - specify forced half/full/autonegotiate duplex
1889 * debug=# - debug level
1890
1891
1892 * Default Chip Configuration:
1893 * DMA Burst = enabled
1894 * IOCHRDY Enabled = enabled
1895 * UseSA = enabled
1896 * CS8900 defaults to half-duplex if not specified on command-line
1897 * CS8920 defaults to autoneg if not specified on command-line
1898 * Use reset defaults for other config parameters
1899
1900 * Assumptions:
1901 * media type specified is supported (circuitry is present)
1902 * if memory address is > 1MB, then required mem decode hw is present
1903 * if 10B-2, then agent other than driver will enable DC/DC converter
1904 (hw or software util)
1905
1906
1907 */
1908
1909 int __init init_module(void)
1910 {
1911 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1912 struct net_local *lp;
1913 int ret = 0;
1914
1915 #if DEBUGGING
1916 net_debug = debug;
1917 #else
1918 debug = 0;
1919 #endif
1920 if (!dev)
1921 return -ENOMEM;
1922
1923 dev->irq = irq;
1924 dev->base_addr = io;
1925 lp = netdev_priv(dev);
1926
1927 #if ALLOW_DMA
1928 if (use_dma) {
1929 lp->use_dma = use_dma;
1930 lp->dma = dma;
1931 lp->dmasize = dmasize;
1932 }
1933 #endif
1934
1935 spin_lock_init(&lp->lock);
1936
1937 /* boy, they'd better get these right */
1938 if (!strcmp(media, "rj45"))
1939 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1940 else if (!strcmp(media, "aui"))
1941 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1942 else if (!strcmp(media, "bnc"))
1943 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1944 else
1945 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1946
1947 if (duplex==-1)
1948 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1949
1950 if (io == 0) {
1951 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1952 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1953 ret = -EPERM;
1954 goto out;
1955 } else if (io <= 0x1ff) {
1956 ret = -ENXIO;
1957 goto out;
1958 }
1959
1960 #if ALLOW_DMA
1961 if (use_dma && dmasize != 16 && dmasize != 64) {
1962 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1963 ret = -EPERM;
1964 goto out;
1965 }
1966 #endif
1967 ret = cs89x0_probe1(dev, io, 1);
1968 if (ret)
1969 goto out;
1970
1971 dev_cs89x0 = dev;
1972 return 0;
1973 out:
1974 free_netdev(dev);
1975 return ret;
1976 }
1977
1978 void __exit
1979 cleanup_module(void)
1980 {
1981 unregister_netdev(dev_cs89x0);
1982 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1983 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1984 free_netdev(dev_cs89x0);
1985 }
1986 #endif /* MODULE */
1987
1988 /*
1989 * Local variables:
1990 * version-control: t
1991 * kept-new-versions: 5
1992 * c-indent-level: 8
1993 * tab-width: 8
1994 * End:
1995 *
1996 */
Support for the Chinese Samsung S3C2440 based development boards