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[deliverable/linux.git] / drivers / net / cs89x0.c
CommitLineData
1da177e4
LT		 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
6aa20a22 18 : Changes for Linux 2.0 compatibility.
1da177e4
LT		 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
6aa20a22 24 : that the module is in use and wouldn't eject the
1da177e4
LT		 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
6aa20a22 34 Melody Lee : Aug 10 1999. Changes for Linux 2.2.5 compatibility.
1da177e4
LT		 35 : email: ethernet@crystal.cirrus.com
36
37 Alan Cox : Removed 1.2 support, added 2.1 extra counters.
38
e1f8e874 39 Andrew Morton : Kernel 2.3.48
1da177e4
LT		 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
e1f8e874 51 Andrew Morton : Kernel 2.3.99-pre1
1da177e4
LT		 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
e1f8e874 59 Andrew Morton : Kernel 2.3.99-pre4-1
1da177e4
LT		 60 : MOD_INC/DEC race fix (see
61 : http://www.uwsg.indiana.edu/hypermail/linux/kernel/0003.3/1532.html)
62
e1f8e874 63 Andrew Morton : Kernel 2.4.0-test7-pre2
1da177e4
LT		 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
032874e4
LB		 89 Dmitry Pervushin : dpervushin@ru.mvista.com
90 : PNX010X platform support
91
9c878967
DS		 92 Deepak Saxena : dsaxena@plexity.net
93 : Intel IXDP2351 platform support
94
5aeebe01
LB		 95 Dmitry Pervushin : dpervushin@ru.mvista.com
96 : PNX010X platform support
97
1da177e4
LT		 98*/
99
100/* Always include 'config.h' first in case the user wants to turn on
101 or override something. */
1da177e4
LT		 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 */
91e1c463 110#ifndef CONFIG_ISA_DMA_API
1da177e4
LT		 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>
7625d483 150#include <asm/irq.h>
1da177e4
LT		 151#if ALLOW_DMA
152#include <asm/dma.h>
153#endif
154
155#include "cs89x0.h"
156
157static char version[] __initdata =
e1f8e874 158"cs89x0.c: v2.4.3-pre1 Russell Nelson <nelson@crynwr.com>, Andrew Morton\n";
1da177e4
LT		 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
6aa20a22
JG		 165 the page window before probing
166 Addr & 3 = Reset the page window and probe
1da177e4
LT		 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. */
6aa20a22 170/* The cs8900 has 4 IRQ pins, software selectable. cs8900_irq_map maps
1da177e4
LT		 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
a80763c9 174static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 175 { 0x80090303, 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
176static unsigned int cs8900_irq_map[] = {12,0,0,0};
177#elif defined(CONFIG_SH_HICOSH4)
a80763c9 178static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 179 { 0x0300, 0};
180static unsigned int cs8900_irq_map[] = {1,0,0,0};
9c878967 181#elif defined(CONFIG_MACH_IXDP2351)
a80763c9 182static unsigned int netcard_portlist[] __used __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
9c878967
DS		 183static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
184#include <asm/irq.h>
1da177e4
LT		 185#elif defined(CONFIG_ARCH_IXDP2X01)
186#include <asm/irq.h>
a80763c9 187static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
1da177e4 188static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
277cb103 189#elif defined(CONFIG_ARCH_PNX010X)
0dd3c781 190#include <asm/irq.h>
a09e64fb 191#include <mach/gpio.h>
0dd3c781 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 */
a80763c9 194static unsigned int netcard_portlist[] __used __initdata = {CIRRUS_DEFAULT_BASE, 0};
0dd3c781 195static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
0ac4ed9d
GC		 196#elif defined(CONFIG_MACH_MX31ADS)
197#include <mach/board-mx31ads.h>
198static unsigned int netcard_portlist[] __used __initdata = {
199 PBC_BASE_ADDRESS + PBC_CS8900A_IOBASE + 0x300, 0
200};
201static unsigned cs8900_irq_map[] = {EXPIO_INT_ENET_INT, 0, 0, 0};
1da177e4 202#else
a80763c9 203static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 204 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
205static unsigned int cs8900_irq_map[] = {10,11,12,5};
206#endif
207
208#if DEBUGGING
209static 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. */
227struct 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
254static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
255static int net_open(struct net_device *dev);
256static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
7d12e780 257static irqreturn_t net_interrupt(int irq, void *dev_id);
1da177e4
LT		 258static void set_multicast_list(struct net_device *dev);
259static void net_timeout(struct net_device *dev);
260static void net_rx(struct net_device *dev);
261static int net_close(struct net_device *dev);
262static struct net_device_stats *net_get_stats(struct net_device *dev);
263static void reset_chip(struct net_device *dev);
264static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
265static int get_eeprom_cksum(int off, int len, int *buffer);
266static int set_mac_address(struct net_device *dev, void *addr);
267static void count_rx_errors(int status, struct net_local *lp);
6f519165
DS		 268#ifdef CONFIG_NET_POLL_CONTROLLER
269static void net_poll_controller(struct net_device *dev);
270#endif
1da177e4
LT		 271#if ALLOW_DMA
272static void get_dma_channel(struct net_device *dev);
273static 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)
283static int g_cs89x0_dma;
284
285static 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
295static int g_cs89x0_media__force;
296
297static 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
6aa20a22 307
1da177e4
LT		 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
316struct 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;
1da177e4 350 return dev;
1da177e4
LT		 351out:
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
9c878967
DS		 358#if defined(CONFIG_MACH_IXDP2351)
359static u16
360readword(unsigned long base_addr, int portno)
361{
362 return __raw_readw(base_addr + (portno << 1));
363}
364
365static void
366writeword(unsigned long base_addr, int portno, u16 value)
367{
368 __raw_writew(value, base_addr + (portno << 1));
369}
370#elif defined(CONFIG_ARCH_IXDP2X01)
a07f0dbe 371static u16
3b68d70d
LB		 372readword(unsigned long base_addr, int portno)
373{
a07f0dbe 374 return __raw_readl(base_addr + (portno << 1));
3b68d70d
LB		 375}
376
377static void
a07f0dbe 378writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d 379{
a07f0dbe 380 __raw_writel(value, base_addr + (portno << 1));
3b68d70d 381}
580d7b8c 382#elif defined(CONFIG_ARCH_PNX010X)
a07f0dbe 383static u16
3b68d70d
LB		 384readword(unsigned long base_addr, int portno)
385{
386 return inw(base_addr + (portno << 1));
387}
388
389static void
a07f0dbe 390writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d
LB		 391{
392 outw(value, base_addr + (portno << 1));
393}
394#else
a07f0dbe 395static u16
0d5affcf 396readword(unsigned long base_addr, int portno)
1da177e4 397{
0d5affcf 398 return inw(base_addr + portno);
1da177e4
LT		 399}
400
401static void
a07f0dbe 402writeword(unsigned long base_addr, int portno, u16 value)
1da177e4 403{
0d5affcf 404 outw(value, base_addr + portno);
1da177e4 405}
3b68d70d 406#endif
1da177e4 407
084f746a
LB		 408static void
409readwords(unsigned long base_addr, int portno, void *buf, int length)
410{
411 u8 *buf8 = (u8 *)buf;
412
413 do {
a07f0dbe 414 u16 tmp16;
084f746a 415
a07f0dbe
LB		 416 tmp16 = readword(base_addr, portno);
417 *buf8++ = (u8)tmp16;
418 *buf8++ = (u8)(tmp16 >> 8);
084f746a
LB		 419 } while (--length);
420}
421
422static void
423writewords(unsigned long base_addr, int portno, void *buf, int length)
424{
425 u8 *buf8 = (u8 *)buf;
426
427 do {
a07f0dbe 428 u16 tmp16;
084f746a 429
a07f0dbe
LB		 430 tmp16 = *buf8++;
431 tmp16 |= (*buf8++) << 8;
432 writeword(base_addr, portno, tmp16);
084f746a
LB		 433 } while (--length);
434}
435
a07f0dbe
LB		 436static u16
437readreg(struct net_device *dev, u16 regno)
1da177e4 438{
3eaa5e7d
LB		 439 writeword(dev->base_addr, ADD_PORT, regno);
440 return readword(dev->base_addr, DATA_PORT);
1da177e4
LT		 441}
442
443static void
a07f0dbe 444writereg(struct net_device *dev, u16 regno, u16 value)
1da177e4 445{
3eaa5e7d
LB		 446 writeword(dev->base_addr, ADD_PORT, regno);
447 writeword(dev->base_addr, DATA_PORT, value);
1da177e4
LT		 448}
449
450static int __init
451wait_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
463static int __init
464get_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
481static int __init
482get_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
6f519165
DS		 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 */
500static void net_poll_controller(struct net_device *dev)
501{
502 disable_irq(dev->irq);
7d12e780 503 net_interrupt(dev->irq, dev);
6f519165
DS		 504 enable_irq(dev->irq);
505}
506#endif
507
1da177e4
LT		 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
514static int __init
515cs89x0_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;
01bdc033 520 int tmp;
1da177e4
LT		 521 unsigned rev_type = 0;
522 int eeprom_buff[CHKSUM_LEN];
523 int retval;
524
1da177e4
LT		 525 /* Initialize the device structure. */
526 if (!modular) {
527 memset(lp, 0, sizeof(*lp));
528 spin_lock_init(&lp->lock);
529#ifndef MODULE
530#if ALLOW_DMA
531 if (g_cs89x0_dma) {
532 lp->use_dma = 1;
533 lp->dma = g_cs89x0_dma;
534 lp->dmasize = 16; /* Could make this an option... */
535 }
536#endif
537 lp->force = g_cs89x0_media__force;
538#endif
539 }
540
277cb103 541#ifdef CONFIG_ARCH_PNX010X
0dd3c781 542 initialize_ebi();
543
544 /* Map GPIO registers for the pins connected to the CS8900a. */
545 if (map_cirrus_gpio() < 0)
546 return -ENODEV;
547
548 reset_cirrus();
549
550 /* Map event-router registers. */
551 if (map_event_router() < 0)
552 return -ENODEV;
553
554 enable_cirrus_irq();
555
556 unmap_cirrus_gpio();
557 unmap_event_router();
558
559 dev->base_addr = ioaddr;
560
561 for (i = 0 ; i < 3 ; i++)
562 readreg(dev, 0);
563#endif
564
1da177e4
LT		 565 /* Grab the region so we can find another board if autoIRQ fails. */
566 /* WTF is going on here? */
567 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
568 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
569 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
570 retval = -EBUSY;
571 goto out1;
572 }
573
574#ifdef CONFIG_SH_HICOSH4
575 /* truely reset the chip */
fc8c7d79
LB		 576 writeword(ioaddr, ADD_PORT, 0x0114);
577 writeword(ioaddr, DATA_PORT, 0x0040);
1da177e4
LT		 578#endif
579
580 /* if they give us an odd I/O address, then do ONE write to
581 the address port, to get it back to address zero, where we
582 expect to find the EISA signature word. An IO with a base of 0x3
583 will skip the test for the ADD_PORT. */
584 if (ioaddr & 1) {
585 if (net_debug > 1)
586 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
587 if ((ioaddr & 2) != 2)
fc8c7d79 588 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
1da177e4 589 printk(KERN_ERR "%s: bad signature 0x%x\n",
fc8c7d79 590 dev->name, readword(ioaddr & ~3, ADD_PORT));
1da177e4
LT		 591 retval = -ENODEV;
592 goto out2;
593 }
594 }
1da177e4
LT		 595
596 ioaddr &= ~3;
9e1402ab
GD		 597 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
598 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
fc8c7d79 599 writeword(ioaddr, ADD_PORT, PP_ChipID);
1da177e4 600
fc8c7d79 601 tmp = readword(ioaddr, DATA_PORT);
01bdc033 602 if (tmp != CHIP_EISA_ID_SIG) {
fc8c7d79 603 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
01bdc033 604 CHIP_EISA_ID_SIG_STR "\n",
fc8c7d79 605 dev->name, ioaddr, DATA_PORT, tmp);
1da177e4
LT		 606 retval = -ENODEV;
607 goto out2;
608 }
609
610 /* Fill in the 'dev' fields. */
611 dev->base_addr = ioaddr;
612
613 /* get the chip type */
614 rev_type = readreg(dev, PRODUCT_ID_ADD);
615 lp->chip_type = rev_type &~ REVISON_BITS;
616 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
617
618 /* Check the chip type and revision in order to set the correct send command
619 CS8920 revision C and CS8900 revision F can use the faster send. */
620 lp->send_cmd = TX_AFTER_381;
621 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
622 lp->send_cmd = TX_NOW;
623 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
624 lp->send_cmd = TX_NOW;
625
626 if (net_debug && version_printed++ == 0)
627 printk(version);
628
629 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
630 dev->name,
631 lp->chip_type==CS8900?'0':'2',
632 lp->chip_type==CS8920M?"M":"",
633 lp->chip_revision,
634 dev->base_addr);
635
636 reset_chip(dev);
6aa20a22 637
1da177e4
LT		 638 /* Here we read the current configuration of the chip. If there
639 is no Extended EEPROM then the idea is to not disturb the chip
640 configuration, it should have been correctly setup by automatic
641 EEPROM read on reset. So, if the chip says it read the EEPROM
642 the driver will always do *something* instead of complain that
643 adapter_cnf is 0. */
644
645#ifdef CONFIG_SH_HICOSH4
646 if (1) {
647 /* For the HiCO.SH4 board, things are different: we don't
648 have EEPROM, but there is some data in flash, so we go
649 get it there directly (MAC). */
650 __u16 *confd;
651 short cnt;
652 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
653 == 0x006c3000) {
654 confd = (__u16*) 0xa0013fc0;
655 } else {
656 confd = (__u16*) 0xa001ffc0;
657 }
658 cnt = (*confd++ & 0x00ff) >> 1;
659 while (--cnt > 0) {
660 __u16 j = *confd++;
6aa20a22 661
1da177e4
LT		 662 switch (j & 0x0fff) {
663 case PP_IA:
664 for (i = 0; i < ETH_ALEN/2; i++) {
665 dev->dev_addr[i*2] = confd[i] & 0xFF;
666 dev->dev_addr[i*2+1] = confd[i] >> 8;
667 }
668 break;
669 }
670 j = (j >> 12) + 1;
671 confd += j;
672 cnt -= j;
673 }
674 } else
675#endif
676
6aa20a22 677 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
1da177e4
LT		 678 (EEPROM_OK|EEPROM_PRESENT)) {
679 /* Load the MAC. */
680 for (i=0; i < ETH_ALEN/2; i++) {
681 unsigned int Addr;
682 Addr = readreg(dev, PP_IA+i*2);
683 dev->dev_addr[i*2] = Addr & 0xFF;
684 dev->dev_addr[i*2+1] = Addr >> 8;
685 }
6aa20a22
JG		 686
687 /* Load the Adapter Configuration.
688 Note: Barring any more specific information from some
689 other source (ie EEPROM+Schematics), we would not know
690 how to operate a 10Base2 interface on the AUI port.
691 However, since we do read the status of HCB1 and use
692 settings that always result in calls to control_dc_dc(dev,0)
693 a BNC interface should work if the enable pin
694 (dc/dc converter) is on HCB1. It will be called AUI
1da177e4 695 however. */
6aa20a22 696
1da177e4
LT		 697 lp->adapter_cnf = 0;
698 i = readreg(dev, PP_LineCTL);
699 /* Preserve the setting of the HCB1 pin. */
700 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
701 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
702 /* Save the sqelch bit */
703 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
704 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
705 /* Check if the card is in 10Base-t only mode */
706 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
707 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
708 /* Check if the card is in AUI only mode */
709 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
710 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
711 /* Check if the card is in Auto mode. */
712 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
6aa20a22 713 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
1da177e4 714 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
6aa20a22 715
1da177e4
LT		 716 if (net_debug > 1)
717 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
718 dev->name, i, lp->adapter_cnf);
719
720 /* IRQ. Other chips already probe, see below. */
6aa20a22 721 if (lp->chip_type == CS8900)
1da177e4 722 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
6aa20a22 723
1da177e4
LT		 724 printk( "[Cirrus EEPROM] ");
725 }
726
727 printk("\n");
6aa20a22 728
1da177e4
LT		 729 /* First check to see if an EEPROM is attached. */
730#ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
731 if (1) {
732 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
733 } else
734#endif
735 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
736 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
737 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
738 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
739 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
740 /* Check if the chip was able to read its own configuration starting
741 at 0 in the EEPROM*/
742 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
6aa20a22 743 (EEPROM_OK|EEPROM_PRESENT))
1da177e4 744 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
6aa20a22 745
1da177e4
LT		 746 } else {
747 /* This reads an extended EEPROM that is not documented
748 in the CS8900 datasheet. */
6aa20a22 749
1da177e4
LT		 750 /* get transmission control word but keep the autonegotiation bits */
751 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
752 /* Store adapter configuration */
753 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
754 /* Store ISA configuration */
755 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
756 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
757
758 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
759 /* store the initial memory base address */
760 for (i = 0; i < ETH_ALEN/2; i++) {
761 dev->dev_addr[i*2] = eeprom_buff[i];
762 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
763 }
764 if (net_debug > 1)
765 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
766 dev->name, lp->adapter_cnf);
767 }
768
769 /* allow them to force multiple transceivers. If they force multiple, autosense */
770 {
771 int count = 0;
772 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
773 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
774 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
775 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
776 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
777 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
778 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
779 }
780
781 if (net_debug > 1)
782 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
783 dev->name, lp->force, lp->adapter_cnf);
784
785 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
786
787 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
788
789 /* FIXME: we don't set the Ethernet address on the command line. Use
790 ifconfig IFACE hw ether AABBCCDDEEFF */
791
792 printk(KERN_INFO "cs89x0 media %s%s%s",
793 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
794 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
795 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
796
797 lp->irq_map = 0xffff;
798
799 /* If this is a CS8900 then no pnp soft */
800 if (lp->chip_type != CS8900 &&
801 /* Check if the ISA IRQ has been set */
802 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
803 (i != 0 && i < CS8920_NO_INTS))) {
804 if (!dev->irq)
805 dev->irq = i;
806 } else {
807 i = lp->isa_config & INT_NO_MASK;
808 if (lp->chip_type == CS8900) {
0ac4ed9d 809#ifdef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 810 i = cs8900_irq_map[0];
811#else
812 /* Translate the IRQ using the IRQ mapping table. */
ff8ac609 813 if (i >= ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 814 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
815 else
816 i = cs8900_irq_map[i];
6aa20a22 817
1da177e4
LT		 818 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
819 } else {
820 int irq_map_buff[IRQ_MAP_LEN/2];
821
822 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
823 IRQ_MAP_LEN/2,
824 irq_map_buff) >= 0) {
825 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
826 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
827 }
828#endif
829 }
830 if (!dev->irq)
831 dev->irq = i;
832 }
833
834 printk(" IRQ %d", dev->irq);
835
836#if ALLOW_DMA
837 if (lp->use_dma) {
838 get_dma_channel(dev);
839 printk(", DMA %d", dev->dma);
840 }
841 else
842#endif
843 {
844 printk(", programmed I/O");
845 }
846
847 /* print the ethernet address. */
e174961c 848 printk(", MAC %pM", dev->dev_addr);
1da177e4
LT		 849
850 dev->open = net_open;
851 dev->stop = net_close;
852 dev->tx_timeout = net_timeout;
853 dev->watchdog_timeo = HZ;
854 dev->hard_start_xmit = net_send_packet;
855 dev->get_stats = net_get_stats;
856 dev->set_multicast_list = set_multicast_list;
857 dev->set_mac_address = set_mac_address;
6f519165
DS		 858#ifdef CONFIG_NET_POLL_CONTROLLER
859 dev->poll_controller = net_poll_controller;
860#endif
1da177e4
LT		 861
862 printk("\n");
863 if (net_debug)
864 printk("cs89x0_probe1() successful\n");
b1fc5505 865
866 retval = register_netdev(dev);
867 if (retval)
868 goto out3;
1da177e4 869 return 0;
b1fc5505 870out3:
fc8c7d79 871 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 872out2:
873 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
874out1:
875 return retval;
876}
877
6aa20a22 878
1da177e4
LT		 879/*********************************
880 * This page contains DMA routines
881**********************************/
882
883#if ALLOW_DMA
884
885#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
886
887static void
888get_dma_channel(struct net_device *dev)
889{
890 struct net_local *lp = netdev_priv(dev);
891
892 if (lp->dma) {
893 dev->dma = lp->dma;
894 lp->isa_config |= ISA_RxDMA;
895 } else {
896 if ((lp->isa_config & ANY_ISA_DMA) == 0)
897 return;
898 dev->dma = lp->isa_config & DMA_NO_MASK;
899 if (lp->chip_type == CS8900)
900 dev->dma += 5;
901 if (dev->dma < 5 || dev->dma > 7) {
902 lp->isa_config &= ~ANY_ISA_DMA;
903 return;
904 }
905 }
906 return;
907}
908
909static void
910write_dma(struct net_device *dev, int chip_type, int dma)
911{
912 struct net_local *lp = netdev_priv(dev);
913 if ((lp->isa_config & ANY_ISA_DMA) == 0)
914 return;
915 if (chip_type == CS8900) {
916 writereg(dev, PP_CS8900_ISADMA, dma-5);
917 } else {
918 writereg(dev, PP_CS8920_ISADMA, dma);
919 }
920}
921
922static void
923set_dma_cfg(struct net_device *dev)
924{
925 struct net_local *lp = netdev_priv(dev);
926
927 if (lp->use_dma) {
928 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
929 if (net_debug > 3)
930 printk("set_dma_cfg(): no DMA\n");
931 return;
932 }
933 if (lp->isa_config & ISA_RxDMA) {
934 lp->curr_rx_cfg |= RX_DMA_ONLY;
935 if (net_debug > 3)
936 printk("set_dma_cfg(): RX_DMA_ONLY\n");
937 } else {
938 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
939 if (net_debug > 3)
940 printk("set_dma_cfg(): AUTO_RX_DMA\n");
941 }
942 }
943}
944
945static int
946dma_bufcfg(struct net_device *dev)
947{
948 struct net_local *lp = netdev_priv(dev);
949 if (lp->use_dma)
950 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
951 else
952 return 0;
953}
954
955static int
956dma_busctl(struct net_device *dev)
957{
958 int retval = 0;
959 struct net_local *lp = netdev_priv(dev);
960 if (lp->use_dma) {
961 if (lp->isa_config & ANY_ISA_DMA)
962 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
963 if (lp->isa_config & DMA_BURST)
964 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
965 if (lp->dmasize == 64)
966 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
967 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
968 }
969 return retval;
970}
971
972static void
973dma_rx(struct net_device *dev)
974{
975 struct net_local *lp = netdev_priv(dev);
976 struct sk_buff *skb;
977 int status, length;
978 unsigned char *bp = lp->rx_dma_ptr;
979
980 status = bp[0] + (bp[1]<<8);
981 length = bp[2] + (bp[3]<<8);
982 bp += 4;
983 if (net_debug > 5) {
984 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
985 dev->name, (unsigned long)bp, status, length);
986 }
987 if ((status & RX_OK) == 0) {
988 count_rx_errors(status, lp);
989 goto skip_this_frame;
990 }
991
992 /* Malloc up new buffer. */
993 skb = dev_alloc_skb(length + 2);
994 if (skb == NULL) {
995 if (net_debug) /* I don't think we want to do this to a stressed system */
996 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
997 lp->stats.rx_dropped++;
998
999 /* AKPM: advance bp to the next frame */
1000skip_this_frame:
1001 bp += (length + 3) & ~3;
1002 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1003 lp->rx_dma_ptr = bp;
1004 return;
1005 }
1006 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4
LT		 1007
1008 if (bp + length > lp->end_dma_buff) {
1009 int semi_cnt = lp->end_dma_buff - bp;
1010 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1011 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1012 length - semi_cnt);
1013 } else {
1014 memcpy(skb_put(skb,length), bp, length);
1015 }
1016 bp += (length + 3) & ~3;
1017 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1018 lp->rx_dma_ptr = bp;
1019
1020 if (net_debug > 3) {
1021 printk( "%s: received %d byte DMA packet of type %x\n",
1022 dev->name, length,
1023 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1024 }
1025 skb->protocol=eth_type_trans(skb,dev);
1026 netif_rx(skb);
1027 dev->last_rx = jiffies;
1028 lp->stats.rx_packets++;
1029 lp->stats.rx_bytes += length;
1030}
1031
1032#endif /* ALLOW_DMA */
1033
1034void __init reset_chip(struct net_device *dev)
1035{
0ac4ed9d 1036#if !defined(CONFIG_MACH_MX31ADS)
9c878967 1037#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1038 struct net_local *lp = netdev_priv(dev);
1039 int ioaddr = dev->base_addr;
1040#endif
1041 int reset_start_time;
1042
1043 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1044
1045 /* wait 30 ms */
1046 msleep(30);
1047
9c878967 1048#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1049 if (lp->chip_type != CS8900) {
1050 /* Hardware problem requires PNP registers to be reconfigured after a reset */
fc8c7d79 1051 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1da177e4
LT		 1052 outb(dev->irq, ioaddr + DATA_PORT);
1053 outb(0, ioaddr + DATA_PORT + 1);
1054
fc8c7d79 1055 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1da177e4
LT		 1056 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1057 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1058 }
1059#endif /* IXDP2x01 */
1060
1061 /* Wait until the chip is reset */
1062 reset_start_time = jiffies;
1063 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1064 ;
0ac4ed9d 1065#endif /* !CONFIG_MACH_MX31ADS */
1da177e4
LT		 1066}
1067
6aa20a22 1068
1da177e4
LT		 1069static void
1070control_dc_dc(struct net_device *dev, int on_not_off)
1071{
1072 struct net_local *lp = netdev_priv(dev);
1073 unsigned int selfcontrol;
1074 int timenow = jiffies;
6aa20a22 1075 /* control the DC to DC convertor in the SelfControl register.
1da177e4
LT		 1076 Note: This is hooked up to a general purpose pin, might not
1077 always be a DC to DC convertor. */
1078
1079 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1080 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1081 selfcontrol |= HCB1;
1082 else
1083 selfcontrol &= ~HCB1;
1084 writereg(dev, PP_SelfCTL, selfcontrol);
1085
1086 /* Wait for the DC/DC converter to power up - 500ms */
1087 while (jiffies - timenow < HZ)
1088 ;
1089}
1090
1091#define DETECTED_NONE 0
1092#define DETECTED_RJ45H 1
1093#define DETECTED_RJ45F 2
1094#define DETECTED_AUI 3
1095#define DETECTED_BNC 4
1096
1097static int
1098detect_tp(struct net_device *dev)
1099{
1100 struct net_local *lp = netdev_priv(dev);
1101 int timenow = jiffies;
1102 int fdx;
1103
1104 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1105
1106 /* If connected to another full duplex capable 10-Base-T card the link pulses
1107 seem to be lost when the auto detect bit in the LineCTL is set.
1108 To overcome this the auto detect bit will be cleared whilst testing the
1109 10-Base-T interface. This would not be necessary for the sparrow chip but
1110 is simpler to do it anyway. */
1111 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1112 control_dc_dc(dev, 0);
1113
1114 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1115 for (timenow = jiffies; jiffies - timenow < 15; )
1116 ;
1117 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1118 return DETECTED_NONE;
1119
1120 if (lp->chip_type == CS8900) {
1121 switch (lp->force & 0xf0) {
1122#if 0
1123 case FORCE_AUTO:
1124 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1125 return DETECTED_NONE;
1126#endif
1127 /* CS8900 doesn't support AUTO, change to HALF*/
1128 case FORCE_AUTO:
1129 lp->force &= ~FORCE_AUTO;
1130 lp->force |= FORCE_HALF;
1131 break;
1132 case FORCE_HALF:
1133 break;
1134 case FORCE_FULL:
1135 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1136 break;
1137 }
1138 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1139 } else {
1140 switch (lp->force & 0xf0) {
1141 case FORCE_AUTO:
1142 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1143 break;
1144 case FORCE_HALF:
1145 lp->auto_neg_cnf = 0;
1146 break;
1147 case FORCE_FULL:
1148 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1149 break;
1150 }
1151
1152 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1153
1154 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1155 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1156 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1157 if (jiffies - timenow > 4000) {
1158 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1159 break;
1160 }
1161 }
1162 }
1163 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1164 }
1165 if (fdx)
1166 return DETECTED_RJ45F;
1167 else
1168 return DETECTED_RJ45H;
1169}
1170
1171/* send a test packet - return true if carrier bits are ok */
1172static int
1173send_test_pkt(struct net_device *dev)
1174{
1175 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1176 0, 46, /* A 46 in network order */
1177 0, 0, /* DSAP=0 & SSAP=0 fields */
1178 0xf3, 0 /* Control (Test Req + P bit set) */ };
1179 long timenow = jiffies;
1180
1181 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1182
1183 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1184 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1185
974dffc2
LB		 1186 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1187 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1da177e4
LT		 1188
1189 /* Test to see if the chip has allocated memory for the packet */
1190 while (jiffies - timenow < 5)
1191 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1192 break;
1193 if (jiffies - timenow >= 5)
1194 return 0; /* this shouldn't happen */
1195
1196 /* Write the contents of the packet */
084f746a 1197 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1da177e4
LT		 1198
1199 if (net_debug > 1) printk("Sending test packet ");
1200 /* wait a couple of jiffies for packet to be received */
1201 for (timenow = jiffies; jiffies - timenow < 3; )
1202 ;
1203 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1204 if (net_debug > 1) printk("succeeded\n");
1205 return 1;
1206 }
1207 if (net_debug > 1) printk("failed\n");
1208 return 0;
1209}
1210
1211
1212static int
1213detect_aui(struct net_device *dev)
1214{
1215 struct net_local *lp = netdev_priv(dev);
1216
1217 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1218 control_dc_dc(dev, 0);
1219
1220 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1221
1222 if (send_test_pkt(dev))
1223 return DETECTED_AUI;
1224 else
1225 return DETECTED_NONE;
1226}
1227
1228static int
1229detect_bnc(struct net_device *dev)
1230{
1231 struct net_local *lp = netdev_priv(dev);
1232
1233 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1234 control_dc_dc(dev, 1);
1235
1236 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1237
1238 if (send_test_pkt(dev))
1239 return DETECTED_BNC;
1240 else
1241 return DETECTED_NONE;
1242}
1243
6aa20a22 1244
1da177e4
LT		 1245static void
1246write_irq(struct net_device *dev, int chip_type, int irq)
1247{
1248 int i;
1249
1250 if (chip_type == CS8900) {
1251 /* Search the mapping table for the corresponding IRQ pin. */
ff8ac609 1252 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1da177e4
LT		 1253 if (cs8900_irq_map[i] == irq)
1254 break;
1255 /* Not found */
ff8ac609 1256 if (i == ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 1257 i = 3;
1258 writereg(dev, PP_CS8900_ISAINT, i);
1259 } else {
1260 writereg(dev, PP_CS8920_ISAINT, irq);
1261 }
1262}
1263
1264/* Open/initialize the board. This is called (in the current kernel)
1265 sometime after booting when the 'ifconfig' program is run.
1266
1267 This routine should set everything up anew at each open, even
1268 registers that "should" only need to be set once at boot, so that
1269 there is non-reboot way to recover if something goes wrong.
1270 */
1271
1272/* AKPM: do we need to do any locking here? */
1273
1274static int
1275net_open(struct net_device *dev)
1276{
1277 struct net_local *lp = netdev_priv(dev);
1278 int result = 0;
1279 int i;
1280 int ret;
1281
277cb103 1282#if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1da177e4
LT		 1283 if (dev->irq < 2) {
1284 /* Allow interrupts to be generated by the chip */
1285/* Cirrus' release had this: */
1286#if 0
1287 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1288#endif
1289/* And 2.3.47 had this: */
1290 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1291
1292 for (i = 2; i < CS8920_NO_INTS; i++) {
1293 if ((1 << i) & lp->irq_map) {
1294 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1295 dev->irq = i;
1296 write_irq(dev, lp->chip_type, i);
1297 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1298 break;
1299 }
1300 }
1301 }
1302
1303 if (i >= CS8920_NO_INTS) {
1304 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1305 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1306 ret = -EAGAIN;
1307 goto bad_out;
1308 }
1309 }
1310 else
1311#endif
1312 {
0ac4ed9d 1313#ifndef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 1314 if (((1 << dev->irq) & lp->irq_map) == 0) {
1315 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1316 dev->name, dev->irq, lp->irq_map);
1317 ret = -EAGAIN;
1318 goto bad_out;
1319 }
1320#endif
1321/* FIXME: Cirrus' release had this: */
1322 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1323/* And 2.3.47 had this: */
1324#if 0
1325 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1326#endif
1327 write_irq(dev, lp->chip_type, dev->irq);
1328 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1329 if (ret) {
1330 if (net_debug)
1331 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1332 goto bad_out;
1333 }
1334 }
1335
1336#if ALLOW_DMA
1337 if (lp->use_dma) {
1338 if (lp->isa_config & ANY_ISA_DMA) {
1339 unsigned long flags;
1340 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1341 get_order(lp->dmasize * 1024));
1342
1343 if (!lp->dma_buff) {
1344 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1345 goto release_irq;
1346 }
1347 if (net_debug > 1) {
1348 printk( "%s: dma %lx %lx\n",
1349 dev->name,
1350 (unsigned long)lp->dma_buff,
1351 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1352 }
1353 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1354 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1355 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1356 goto release_irq;
1357 }
1358 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1359 if (request_dma(dev->dma, dev->name)) {
1360 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1361 goto release_irq;
1362 }
1363 write_dma(dev, lp->chip_type, dev->dma);
1364 lp->rx_dma_ptr = lp->dma_buff;
1365 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1366 spin_lock_irqsave(&lp->lock, flags);
1367 disable_dma(dev->dma);
1368 clear_dma_ff(dev->dma);
1369 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1370 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1371 set_dma_count(dev->dma, lp->dmasize*1024);
1372 enable_dma(dev->dma);
1373 spin_unlock_irqrestore(&lp->lock, flags);
1374 }
1375 }
1376#endif /* ALLOW_DMA */
1377
1378 /* set the Ethernet address */
1379 for (i=0; i < ETH_ALEN/2; i++)
1380 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1381
1382 /* while we're testing the interface, leave interrupts disabled */
1383 writereg(dev, PP_BusCTL, MEMORY_ON);
1384
1385 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1386 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1387 lp->linectl = LOW_RX_SQUELCH;
1388 else
1389 lp->linectl = 0;
1390
1391 /* check to make sure that they have the "right" hardware available */
1392 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1393 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1394 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1395 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1396 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1397 }
277cb103 1398#ifdef CONFIG_ARCH_PNX010X
0dd3c781 1399 result = A_CNF_10B_T;
1400#endif
1da177e4
LT		 1401 if (!result) {
1402 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
17a9440f
WC		 1403release_dma:
1404#if ALLOW_DMA
1405 free_dma(dev->dma);
17a9440f 1406release_irq:
1da177e4
LT		 1407 release_dma_buff(lp);
1408#endif
1409 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1410 free_irq(dev->irq, dev);
1411 ret = -EAGAIN;
1412 goto bad_out;
1413 }
1414
1415 /* set the hardware to the configured choice */
1416 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1417 case A_CNF_MEDIA_10B_T:
1418 result = detect_tp(dev);
1419 if (result==DETECTED_NONE) {
1420 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1421 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1422 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1423 }
1424 break;
1425 case A_CNF_MEDIA_AUI:
1426 result = detect_aui(dev);
1427 if (result==DETECTED_NONE) {
1428 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1429 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1430 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1431 }
1432 break;
1433 case A_CNF_MEDIA_10B_2:
1434 result = detect_bnc(dev);
1435 if (result==DETECTED_NONE) {
1436 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1437 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1438 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1439 }
1440 break;
1441 case A_CNF_MEDIA_AUTO:
1442 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1443 if (lp->adapter_cnf & A_CNF_10B_T)
1444 if ((result = detect_tp(dev)) != DETECTED_NONE)
1445 break;
1446 if (lp->adapter_cnf & A_CNF_AUI)
1447 if ((result = detect_aui(dev)) != DETECTED_NONE)
1448 break;
1449 if (lp->adapter_cnf & A_CNF_10B_2)
1450 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1451 break;
1452 printk(KERN_ERR "%s: no media detected\n", dev->name);
17a9440f 1453 goto release_dma;
1da177e4
LT		 1454 }
1455 switch(result) {
1456 case DETECTED_NONE:
1457 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
17a9440f 1458 goto release_dma;
1da177e4
LT		 1459 case DETECTED_RJ45H:
1460 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1461 break;
1462 case DETECTED_RJ45F:
1463 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1464 break;
1465 case DETECTED_AUI:
1466 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1467 break;
1468 case DETECTED_BNC:
1469 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1470 break;
1471 }
1472
1473 /* Turn on both receive and transmit operations */
1474 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1475
1476 /* Receive only error free packets addressed to this card */
1477 lp->rx_mode = 0;
1478 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1479
1480 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1481
1482 if (lp->isa_config & STREAM_TRANSFER)
1483 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1484#if ALLOW_DMA
1485 set_dma_cfg(dev);
1486#endif
1487 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1488
1489 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1490 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1491
1492 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1493#if ALLOW_DMA
1494 dma_bufcfg(dev) |
1495#endif
1496 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1497
1498 /* now that we've got our act together, enable everything */
1499 writereg(dev, PP_BusCTL, ENABLE_IRQ
1500 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1501#if ALLOW_DMA
1502 | dma_busctl(dev)
1503#endif
1504 );
1505 netif_start_queue(dev);
1506 if (net_debug > 1)
1507 printk("cs89x0: net_open() succeeded\n");
1508 return 0;
1509bad_out:
1510 return ret;
1511}
1512
1513static void net_timeout(struct net_device *dev)
1514{
1515 /* If we get here, some higher level has decided we are broken.
1516 There should really be a "kick me" function call instead. */
1517 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1518 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1519 /* Try to restart the adaptor. */
1520 netif_wake_queue(dev);
1521}
1522
1523static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1524{
1525 struct net_local *lp = netdev_priv(dev);
1526
1527 if (net_debug > 3) {
1528 printk("%s: sent %d byte packet of type %x\n",
1529 dev->name, skb->len,
1530 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1531 }
1532
1533 /* keep the upload from being interrupted, since we
1534 ask the chip to start transmitting before the
1535 whole packet has been completely uploaded. */
1536
1537 spin_lock_irq(&lp->lock);
1538 netif_stop_queue(dev);
1539
1540 /* initiate a transmit sequence */
974dffc2
LB		 1541 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1542 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1da177e4
LT		 1543
1544 /* Test to see if the chip has allocated memory for the packet */
1545 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1546 /*
1547 * Gasp! It hasn't. But that shouldn't happen since
1548 * we're waiting for TxOk, so return 1 and requeue this packet.
1549 */
6aa20a22 1550
1da177e4
LT		 1551 spin_unlock_irq(&lp->lock);
1552 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1553 return 1;
1554 }
1555 /* Write the contents of the packet */
084f746a 1556 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1da177e4 1557 spin_unlock_irq(&lp->lock);
e1699f50 1558 lp->stats.tx_bytes += skb->len;
1da177e4
LT		 1559 dev->trans_start = jiffies;
1560 dev_kfree_skb (skb);
1561
1562 /*
1563 * We DO NOT call netif_wake_queue() here.
1564 * We also DO NOT call netif_start_queue().
1565 *
1566 * Either of these would cause another bottom half run through
1567 * net_send_packet() before this packet has fully gone out. That causes
1568 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1569 * a dog. We just return and wait for the Tx completion interrupt handler
1570 * to restart the netdevice layer
1571 */
1572
1573 return 0;
1574}
6aa20a22 1575
1da177e4
LT		 1576/* The typical workload of the driver:
1577 Handle the network interface interrupts. */
6aa20a22 1578
7d12e780 1579static irqreturn_t net_interrupt(int irq, void *dev_id)
1da177e4
LT		 1580{
1581 struct net_device *dev = dev_id;
1582 struct net_local *lp;
1583 int ioaddr, status;
1584 int handled = 0;
1585
1586 ioaddr = dev->base_addr;
1587 lp = netdev_priv(dev);
1588
1589 /* we MUST read all the events out of the ISQ, otherwise we'll never
1590 get interrupted again. As a consequence, we can't have any limit
1591 on the number of times we loop in the interrupt handler. The
1592 hardware guarantees that eventually we'll run out of events. Of
1593 course, if you're on a slow machine, and packets are arriving
1594 faster than you can read them off, you're screwed. Hasta la
1595 vista, baby! */
974dffc2 1596 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1da177e4
LT		 1597 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1598 handled = 1;
1599 switch(status & ISQ_EVENT_MASK) {
1600 case ISQ_RECEIVER_EVENT:
1601 /* Got a packet(s). */
1602 net_rx(dev);
1603 break;
1604 case ISQ_TRANSMITTER_EVENT:
1605 lp->stats.tx_packets++;
1606 netif_wake_queue(dev); /* Inform upper layers. */
1607 if ((status & ( TX_OK |
1608 TX_LOST_CRS |
1609 TX_SQE_ERROR |
1610 TX_LATE_COL |
1611 TX_16_COL)) != TX_OK) {
1612 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1613 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1614 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1615 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1616 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1617 }
1618 break;
1619 case ISQ_BUFFER_EVENT:
1620 if (status & READY_FOR_TX) {
1621 /* we tried to transmit a packet earlier,
1622 but inexplicably ran out of buffers.
1623 That shouldn't happen since we only ever
1624 load one packet. Shrug. Do the right
1625 thing anyway. */
1626 netif_wake_queue(dev); /* Inform upper layers. */
1627 }
1628 if (status & TX_UNDERRUN) {
1629 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1630 lp->send_underrun++;
1631 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1632 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1633 /* transmit cycle is done, although
1634 frame wasn't transmitted - this
1635 avoids having to wait for the upper
1636 layers to timeout on us, in the
1637 event of a tx underrun */
1638 netif_wake_queue(dev); /* Inform upper layers. */
1639 }
1640#if ALLOW_DMA
1641 if (lp->use_dma && (status & RX_DMA)) {
1642 int count = readreg(dev, PP_DmaFrameCnt);
1643 while(count) {
1644 if (net_debug > 5)
1645 printk("%s: receiving %d DMA frames\n", dev->name, count);
1646 if (net_debug > 2 && count >1)
1647 printk("%s: receiving %d DMA frames\n", dev->name, count);
1648 dma_rx(dev);
1649 if (--count == 0)
1650 count = readreg(dev, PP_DmaFrameCnt);
1651 if (net_debug > 2 && count > 0)
1652 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1653 }
1654 }
1655#endif
1656 break;
1657 case ISQ_RX_MISS_EVENT:
1658 lp->stats.rx_missed_errors += (status >>6);
1659 break;
1660 case ISQ_TX_COL_EVENT:
1661 lp->stats.collisions += (status >>6);
1662 break;
1663 }
1664 }
1665 return IRQ_RETVAL(handled);
1666}
1667
1668static void
1669count_rx_errors(int status, struct net_local *lp)
1670{
1671 lp->stats.rx_errors++;
1672 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1673 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1674 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1675 /* per str 172 */
1676 lp->stats.rx_crc_errors++;
1677 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1678 return;
1679}
1680
1681/* We have a good packet(s), get it/them out of the buffers. */
1682static void
1683net_rx(struct net_device *dev)
1684{
1685 struct net_local *lp = netdev_priv(dev);
1686 struct sk_buff *skb;
1687 int status, length;
1688
1689 int ioaddr = dev->base_addr;
fc8c7d79
LB		 1690 status = readword(ioaddr, RX_FRAME_PORT);
1691 length = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1692
1693 if ((status & RX_OK) == 0) {
1694 count_rx_errors(status, lp);
1695 return;
1696 }
1697
1698 /* Malloc up new buffer. */
1699 skb = dev_alloc_skb(length + 2);
1700 if (skb == NULL) {
1701#if 0 /* Again, this seems a cruel thing to do */
1702 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1703#endif
1704 lp->stats.rx_dropped++;
1705 return;
1706 }
1707 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4 1708
084f746a 1709 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1da177e4 1710 if (length & 1)
fc8c7d79 1711 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1712
1713 if (net_debug > 3) {
1714 printk( "%s: received %d byte packet of type %x\n",
1715 dev->name, length,
1716 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1717 }
1718
1719 skb->protocol=eth_type_trans(skb,dev);
1720 netif_rx(skb);
1721 dev->last_rx = jiffies;
1722 lp->stats.rx_packets++;
1723 lp->stats.rx_bytes += length;
1724}
1725
1726#if ALLOW_DMA
1727static void release_dma_buff(struct net_local *lp)
1728{
1729 if (lp->dma_buff) {
1730 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1731 lp->dma_buff = NULL;
1732 }
1733}
1734#endif
1735
1736/* The inverse routine to net_open(). */
1737static int
1738net_close(struct net_device *dev)
1739{
1740#if ALLOW_DMA
1741 struct net_local *lp = netdev_priv(dev);
1742#endif
1743
1744 netif_stop_queue(dev);
6aa20a22 1745
1da177e4
LT		 1746 writereg(dev, PP_RxCFG, 0);
1747 writereg(dev, PP_TxCFG, 0);
1748 writereg(dev, PP_BufCFG, 0);
1749 writereg(dev, PP_BusCTL, 0);
1750
1751 free_irq(dev->irq, dev);
1752
1753#if ALLOW_DMA
1754 if (lp->use_dma && lp->dma) {
1755 free_dma(dev->dma);
1756 release_dma_buff(lp);
1757 }
1758#endif
1759
1760 /* Update the statistics here. */
1761 return 0;
1762}
1763
1764/* Get the current statistics. This may be called with the card open or
1765 closed. */
1766static struct net_device_stats *
1767net_get_stats(struct net_device *dev)
1768{
1769 struct net_local *lp = netdev_priv(dev);
1770 unsigned long flags;
1771
1772 spin_lock_irqsave(&lp->lock, flags);
1773 /* Update the statistics from the device registers. */
1774 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1775 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1776 spin_unlock_irqrestore(&lp->lock, flags);
1777
1778 return &lp->stats;
1779}
1780
1781static void set_multicast_list(struct net_device *dev)
1782{
1783 struct net_local *lp = netdev_priv(dev);
1784 unsigned long flags;
1785
1786 spin_lock_irqsave(&lp->lock, flags);
1787 if(dev->flags&IFF_PROMISC)
1788 {
1789 lp->rx_mode = RX_ALL_ACCEPT;
1790 }
1791 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1792 {
1793 /* The multicast-accept list is initialized to accept-all, and we
1794 rely on higher-level filtering for now. */
1795 lp->rx_mode = RX_MULTCAST_ACCEPT;
6aa20a22 1796 }
1da177e4
LT		 1797 else
1798 lp->rx_mode = 0;
1799
1800 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1801
1802 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1803 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1804 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1805 spin_unlock_irqrestore(&lp->lock, flags);
1806}
1807
1808
1809static int set_mac_address(struct net_device *dev, void *p)
1810{
1811 int i;
1812 struct sockaddr *addr = p;
1813
1da177e4
LT		 1814 if (netif_running(dev))
1815 return -EBUSY;
1816
1817 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1818
e174961c
JB		 1819 if (net_debug)
1820 printk("%s: Setting MAC address to %pM.\n",
1821 dev->name, dev->dev_addr);
1822
1da177e4
LT		 1823 /* set the Ethernet address */
1824 for (i=0; i < ETH_ALEN/2; i++)
1825 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1826
1827 return 0;
1828}
1829
1830#ifdef MODULE
1831
1832static struct net_device *dev_cs89x0;
1833
1834/*
6aa20a22
JG		 1835 * Support the 'debug' module parm even if we're compiled for non-debug to
1836 * avoid breaking someone's startup scripts
1da177e4
LT		 1837 */
1838
1839static int io;
1840static int irq;
1841static int debug;
1842static char media[8];
1843static int duplex=-1;
1844
1845static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1846static int dma;
1847static int dmasize=16; /* or 64 */
1848
1849module_param(io, int, 0);
1850module_param(irq, int, 0);
1851module_param(debug, int, 0);
1852module_param_string(media, media, sizeof(media), 0);
1853module_param(duplex, int, 0);
1854module_param(dma , int, 0);
1855module_param(dmasize , int, 0);
1856module_param(use_dma , int, 0);
1857MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1858MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1859#if DEBUGGING
1860MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1861#else
1862MODULE_PARM_DESC(debug, "(ignored)");
1863#endif
1864MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1865/* No other value than -1 for duplex seems to be currently interpreted */
1866MODULE_PARM_DESC(duplex, "(ignored)");
1867#if ALLOW_DMA
1868MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1869MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1870MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1871#else
1872MODULE_PARM_DESC(dma , "(ignored)");
1873MODULE_PARM_DESC(dmasize , "(ignored)");
1874MODULE_PARM_DESC(use_dma , "(ignored)");
1875#endif
1876
e1f8e874 1877MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1da177e4
LT		 1878MODULE_LICENSE("GPL");
1879
1880
1881/*
1882* media=t - specify media type
1883 or media=2
1884 or media=aui
1885 or medai=auto
1886* duplex=0 - specify forced half/full/autonegotiate duplex
1887* debug=# - debug level
1888
1889
1890* Default Chip Configuration:
1891 * DMA Burst = enabled
1892 * IOCHRDY Enabled = enabled
1893 * UseSA = enabled
1894 * CS8900 defaults to half-duplex if not specified on command-line
1895 * CS8920 defaults to autoneg if not specified on command-line
1896 * Use reset defaults for other config parameters
1897
1898* Assumptions:
1899 * media type specified is supported (circuitry is present)
1900 * if memory address is > 1MB, then required mem decode hw is present
1901 * if 10B-2, then agent other than driver will enable DC/DC converter
1902 (hw or software util)
1903
1904
1905*/
1906
e26c129a 1907int __init init_module(void)
1da177e4
LT		 1908{
1909 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1910 struct net_local *lp;
1911 int ret = 0;
1912
1913#if DEBUGGING
1914 net_debug = debug;
1915#else
1916 debug = 0;
1917#endif
1918 if (!dev)
1919 return -ENOMEM;
1920
1921 dev->irq = irq;
1922 dev->base_addr = io;
1923 lp = netdev_priv(dev);
1924
1925#if ALLOW_DMA
1926 if (use_dma) {
1927 lp->use_dma = use_dma;
1928 lp->dma = dma;
1929 lp->dmasize = dmasize;
1930 }
1931#endif
1932
1933 spin_lock_init(&lp->lock);
1934
1935 /* boy, they'd better get these right */
1936 if (!strcmp(media, "rj45"))
1937 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1938 else if (!strcmp(media, "aui"))
1939 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1940 else if (!strcmp(media, "bnc"))
1941 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1942 else
1943 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1944
1945 if (duplex==-1)
1946 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1947
1948 if (io == 0) {
1949 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1950 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1951 ret = -EPERM;
1952 goto out;
1953 } else if (io <= 0x1ff) {
1954 ret = -ENXIO;
1955 goto out;
1956 }
1957
1958#if ALLOW_DMA
1959 if (use_dma && dmasize != 16 && dmasize != 64) {
1960 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1961 ret = -EPERM;
1962 goto out;
1963 }
1964#endif
1965 ret = cs89x0_probe1(dev, io, 1);
1966 if (ret)
1967 goto out;
1968
1da177e4
LT		 1969 dev_cs89x0 = dev;
1970 return 0;
1971out:
1972 free_netdev(dev);
1973 return ret;
1974}
1975
afc8eb46 1976void __exit
1da177e4
LT		 1977cleanup_module(void)
1978{
1979 unregister_netdev(dev_cs89x0);
fc8c7d79 1980 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 1981 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1982 free_netdev(dev_cs89x0);
1983}
1984#endif /* MODULE */
6aa20a22 1985
1da177e4
LT		 1986/*
1987 * Local variables:
1988 * version-control: t
1989 * kept-new-versions: 5
1990 * c-indent-level: 8
1991 * tab-width: 8
1992 * End:
1993 *
1994 */
Linux kernel - Deliverables
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