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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. */
635f0258 173#if defined(CONFIG_SH_HICOSH4)
a80763c9 174static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 175 { 0x0300, 0};
176static unsigned int cs8900_irq_map[] = {1,0,0,0};
9c878967 177#elif defined(CONFIG_MACH_IXDP2351)
a80763c9 178static unsigned int netcard_portlist[] __used __initdata = {IXDP2351_VIRT_CS8900_BASE, 0};
9c878967
DS		 179static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
180#include <asm/irq.h>
1da177e4
LT		 181#elif defined(CONFIG_ARCH_IXDP2X01)
182#include <asm/irq.h>
a80763c9 183static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
1da177e4 184static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
277cb103 185#elif defined(CONFIG_ARCH_PNX010X)
0dd3c781 186#include <asm/irq.h>
a09e64fb 187#include <mach/gpio.h>
0dd3c781 188#define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
189#define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
a80763c9 190static unsigned int netcard_portlist[] __used __initdata = {CIRRUS_DEFAULT_BASE, 0};
0dd3c781 191static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
0ac4ed9d
GC		 192#elif defined(CONFIG_MACH_MX31ADS)
193#include <mach/board-mx31ads.h>
194static unsigned int netcard_portlist[] __used __initdata = {
195 PBC_BASE_ADDRESS + PBC_CS8900A_IOBASE + 0x300, 0
196};
197static unsigned cs8900_irq_map[] = {EXPIO_INT_ENET_INT, 0, 0, 0};
1da177e4 198#else
a80763c9 199static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 200 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
201static unsigned int cs8900_irq_map[] = {10,11,12,5};
202#endif
203
204#if DEBUGGING
205static unsigned int net_debug = DEBUGGING;
206#else
207#define net_debug 0 /* gcc will remove all the debug code for us */
208#endif
209
210/* The number of low I/O ports used by the ethercard. */
211#define NETCARD_IO_EXTENT 16
212
213/* we allow the user to override various values normally set in the EEPROM */
214#define FORCE_RJ45 0x0001 /* pick one of these three */
215#define FORCE_AUI 0x0002
216#define FORCE_BNC 0x0004
217
218#define FORCE_AUTO 0x0010 /* pick one of these three */
219#define FORCE_HALF 0x0020
220#define FORCE_FULL 0x0030
221
222/* Information that need to be kept for each board. */
223struct net_local {
224 struct net_device_stats stats;
225 int chip_type; /* one of: CS8900, CS8920, CS8920M */
226 char chip_revision; /* revision letter of the chip ('A'...) */
227 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
228 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
229 int adapter_cnf; /* adapter configuration from EEPROM */
230 int isa_config; /* ISA configuration from EEPROM */
231 int irq_map; /* IRQ map from EEPROM */
232 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
233 int curr_rx_cfg; /* a copy of PP_RxCFG */
234 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
235 int send_underrun; /* keep track of how many underruns in a row we get */
236 int force; /* force various values; see FORCE* above. */
237 spinlock_t lock;
238#if ALLOW_DMA
239 int use_dma; /* Flag: we're using dma */
240 int dma; /* DMA channel */
241 int dmasize; /* 16 or 64 */
242 unsigned char *dma_buff; /* points to the beginning of the buffer */
243 unsigned char *end_dma_buff; /* points to the end of the buffer */
244 unsigned char *rx_dma_ptr; /* points to the next packet */
245#endif
246};
247
248/* Index to functions, as function prototypes. */
249
250static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
251static int net_open(struct net_device *dev);
252static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
7d12e780 253static irqreturn_t net_interrupt(int irq, void *dev_id);
1da177e4
LT		 254static void set_multicast_list(struct net_device *dev);
255static void net_timeout(struct net_device *dev);
256static void net_rx(struct net_device *dev);
257static int net_close(struct net_device *dev);
258static struct net_device_stats *net_get_stats(struct net_device *dev);
259static void reset_chip(struct net_device *dev);
260static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
261static int get_eeprom_cksum(int off, int len, int *buffer);
262static int set_mac_address(struct net_device *dev, void *addr);
263static void count_rx_errors(int status, struct net_local *lp);
6f519165
DS		 264#ifdef CONFIG_NET_POLL_CONTROLLER
265static void net_poll_controller(struct net_device *dev);
266#endif
1da177e4
LT		 267#if ALLOW_DMA
268static void get_dma_channel(struct net_device *dev);
269static void release_dma_buff(struct net_local *lp);
270#endif
271
272/* Example routines you must write ;->. */
273#define tx_done(dev) 1
274
275/*
276 * Permit 'cs89x0_dma=N' in the kernel boot environment
277 */
278#if !defined(MODULE) && (ALLOW_DMA != 0)
279static int g_cs89x0_dma;
280
281static int __init dma_fn(char *str)
282{
283 g_cs89x0_dma = simple_strtol(str,NULL,0);
284 return 1;
285}
286
287__setup("cs89x0_dma=", dma_fn);
288#endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
289
290#ifndef MODULE
291static int g_cs89x0_media__force;
292
293static int __init media_fn(char *str)
294{
295 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
296 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
297 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
298 return 1;
299}
300
301__setup("cs89x0_media=", media_fn);
302
6aa20a22 303
1da177e4
LT		 304/* Check for a network adaptor of this type, and return '0' iff one exists.
305 If dev->base_addr == 0, probe all likely locations.
306 If dev->base_addr == 1, always return failure.
307 If dev->base_addr == 2, allocate space for the device and return success
308 (detachable devices only).
309 Return 0 on success.
310 */
311
312struct net_device * __init cs89x0_probe(int unit)
313{
314 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
315 unsigned *port;
316 int err = 0;
317 int irq;
318 int io;
319
320 if (!dev)
321 return ERR_PTR(-ENODEV);
322
323 sprintf(dev->name, "eth%d", unit);
324 netdev_boot_setup_check(dev);
325 io = dev->base_addr;
326 irq = dev->irq;
327
328 if (net_debug)
329 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
330
331 if (io > 0x1ff) { /* Check a single specified location. */
332 err = cs89x0_probe1(dev, io, 0);
333 } else if (io != 0) { /* Don't probe at all. */
334 err = -ENXIO;
335 } else {
336 for (port = netcard_portlist; *port; port++) {
337 if (cs89x0_probe1(dev, *port, 0) == 0)
338 break;
339 dev->irq = irq;
340 }
341 if (!*port)
342 err = -ENODEV;
343 }
344 if (err)
345 goto out;
1da177e4 346 return dev;
1da177e4
LT		 347out:
348 free_netdev(dev);
349 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
350 return ERR_PTR(err);
351}
352#endif
353
9c878967
DS		 354#if defined(CONFIG_MACH_IXDP2351)
355static u16
356readword(unsigned long base_addr, int portno)
357{
358 return __raw_readw(base_addr + (portno << 1));
359}
360
361static void
362writeword(unsigned long base_addr, int portno, u16 value)
363{
364 __raw_writew(value, base_addr + (portno << 1));
365}
366#elif defined(CONFIG_ARCH_IXDP2X01)
a07f0dbe 367static u16
3b68d70d
LB		 368readword(unsigned long base_addr, int portno)
369{
a07f0dbe 370 return __raw_readl(base_addr + (portno << 1));
3b68d70d
LB		 371}
372
373static void
a07f0dbe 374writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d 375{
a07f0dbe 376 __raw_writel(value, base_addr + (portno << 1));
3b68d70d 377}
580d7b8c 378#elif defined(CONFIG_ARCH_PNX010X)
a07f0dbe 379static u16
3b68d70d
LB		 380readword(unsigned long base_addr, int portno)
381{
382 return inw(base_addr + (portno << 1));
383}
384
385static void
a07f0dbe 386writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d
LB		 387{
388 outw(value, base_addr + (portno << 1));
389}
390#else
a07f0dbe 391static u16
0d5affcf 392readword(unsigned long base_addr, int portno)
1da177e4 393{
0d5affcf 394 return inw(base_addr + portno);
1da177e4
LT		 395}
396
397static void
a07f0dbe 398writeword(unsigned long base_addr, int portno, u16 value)
1da177e4 399{
0d5affcf 400 outw(value, base_addr + portno);
1da177e4 401}
3b68d70d 402#endif
1da177e4 403
084f746a
LB		 404static void
405readwords(unsigned long base_addr, int portno, void *buf, int length)
406{
407 u8 *buf8 = (u8 *)buf;
408
409 do {
a07f0dbe 410 u16 tmp16;
084f746a 411
a07f0dbe
LB		 412 tmp16 = readword(base_addr, portno);
413 *buf8++ = (u8)tmp16;
414 *buf8++ = (u8)(tmp16 >> 8);
084f746a
LB		 415 } while (--length);
416}
417
418static void
419writewords(unsigned long base_addr, int portno, void *buf, int length)
420{
421 u8 *buf8 = (u8 *)buf;
422
423 do {
a07f0dbe 424 u16 tmp16;
084f746a 425
a07f0dbe
LB		 426 tmp16 = *buf8++;
427 tmp16 |= (*buf8++) << 8;
428 writeword(base_addr, portno, tmp16);
084f746a
LB		 429 } while (--length);
430}
431
a07f0dbe
LB		 432static u16
433readreg(struct net_device *dev, u16 regno)
1da177e4 434{
3eaa5e7d
LB		 435 writeword(dev->base_addr, ADD_PORT, regno);
436 return readword(dev->base_addr, DATA_PORT);
1da177e4
LT		 437}
438
439static void
a07f0dbe 440writereg(struct net_device *dev, u16 regno, u16 value)
1da177e4 441{
3eaa5e7d
LB		 442 writeword(dev->base_addr, ADD_PORT, regno);
443 writeword(dev->base_addr, DATA_PORT, value);
1da177e4
LT		 444}
445
446static int __init
447wait_eeprom_ready(struct net_device *dev)
448{
449 int timeout = jiffies;
450 /* check to see if the EEPROM is ready, a timeout is used -
451 just in case EEPROM is ready when SI_BUSY in the
452 PP_SelfST is clear */
453 while(readreg(dev, PP_SelfST) & SI_BUSY)
454 if (jiffies - timeout >= 40)
455 return -1;
456 return 0;
457}
458
459static int __init
460get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
461{
462 int i;
463
464 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
465 for (i = 0; i < len; i++) {
466 if (wait_eeprom_ready(dev) < 0) return -1;
467 /* Now send the EEPROM read command and EEPROM location to read */
468 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
469 if (wait_eeprom_ready(dev) < 0) return -1;
470 buffer[i] = readreg(dev, PP_EEData);
471 if (net_debug > 3) printk("%04x ", buffer[i]);
472 }
473 if (net_debug > 3) printk("\n");
474 return 0;
475}
476
477static int __init
478get_eeprom_cksum(int off, int len, int *buffer)
479{
480 int i, cksum;
481
482 cksum = 0;
483 for (i = 0; i < len; i++)
484 cksum += buffer[i];
485 cksum &= 0xffff;
486 if (cksum == 0)
487 return 0;
488 return -1;
489}
490
6f519165
DS		 491#ifdef CONFIG_NET_POLL_CONTROLLER
492/*
493 * Polling receive - used by netconsole and other diagnostic tools
494 * to allow network i/o with interrupts disabled.
495 */
496static void net_poll_controller(struct net_device *dev)
497{
498 disable_irq(dev->irq);
7d12e780 499 net_interrupt(dev->irq, dev);
6f519165
DS		 500 enable_irq(dev->irq);
501}
502#endif
503
1da177e4
LT		 504/* This is the real probe routine. Linux has a history of friendly device
505 probes on the ISA bus. A good device probes avoids doing writes, and
506 verifies that the correct device exists and functions.
507 Return 0 on success.
508 */
509
510static int __init
511cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
512{
513 struct net_local *lp = netdev_priv(dev);
514 static unsigned version_printed;
515 int i;
01bdc033 516 int tmp;
1da177e4
LT		 517 unsigned rev_type = 0;
518 int eeprom_buff[CHKSUM_LEN];
519 int retval;
520
1da177e4
LT		 521 /* Initialize the device structure. */
522 if (!modular) {
523 memset(lp, 0, sizeof(*lp));
524 spin_lock_init(&lp->lock);
525#ifndef MODULE
526#if ALLOW_DMA
527 if (g_cs89x0_dma) {
528 lp->use_dma = 1;
529 lp->dma = g_cs89x0_dma;
530 lp->dmasize = 16; /* Could make this an option... */
531 }
532#endif
533 lp->force = g_cs89x0_media__force;
534#endif
535 }
536
277cb103 537#ifdef CONFIG_ARCH_PNX010X
0dd3c781 538 initialize_ebi();
539
540 /* Map GPIO registers for the pins connected to the CS8900a. */
541 if (map_cirrus_gpio() < 0)
542 return -ENODEV;
543
544 reset_cirrus();
545
546 /* Map event-router registers. */
547 if (map_event_router() < 0)
548 return -ENODEV;
549
550 enable_cirrus_irq();
551
552 unmap_cirrus_gpio();
553 unmap_event_router();
554
555 dev->base_addr = ioaddr;
556
557 for (i = 0 ; i < 3 ; i++)
558 readreg(dev, 0);
559#endif
560
1da177e4
LT		 561 /* Grab the region so we can find another board if autoIRQ fails. */
562 /* WTF is going on here? */
563 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
564 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
565 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
566 retval = -EBUSY;
567 goto out1;
568 }
569
570#ifdef CONFIG_SH_HICOSH4
571 /* truely reset the chip */
fc8c7d79
LB		 572 writeword(ioaddr, ADD_PORT, 0x0114);
573 writeword(ioaddr, DATA_PORT, 0x0040);
1da177e4
LT		 574#endif
575
576 /* if they give us an odd I/O address, then do ONE write to
577 the address port, to get it back to address zero, where we
578 expect to find the EISA signature word. An IO with a base of 0x3
579 will skip the test for the ADD_PORT. */
580 if (ioaddr & 1) {
581 if (net_debug > 1)
582 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
583 if ((ioaddr & 2) != 2)
fc8c7d79 584 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
1da177e4 585 printk(KERN_ERR "%s: bad signature 0x%x\n",
fc8c7d79 586 dev->name, readword(ioaddr & ~3, ADD_PORT));
1da177e4
LT		 587 retval = -ENODEV;
588 goto out2;
589 }
590 }
1da177e4
LT		 591
592 ioaddr &= ~3;
9e1402ab
GD		 593 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
594 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
fc8c7d79 595 writeword(ioaddr, ADD_PORT, PP_ChipID);
1da177e4 596
fc8c7d79 597 tmp = readword(ioaddr, DATA_PORT);
01bdc033 598 if (tmp != CHIP_EISA_ID_SIG) {
fc8c7d79 599 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
01bdc033 600 CHIP_EISA_ID_SIG_STR "\n",
fc8c7d79 601 dev->name, ioaddr, DATA_PORT, tmp);
1da177e4
LT		 602 retval = -ENODEV;
603 goto out2;
604 }
605
606 /* Fill in the 'dev' fields. */
607 dev->base_addr = ioaddr;
608
609 /* get the chip type */
610 rev_type = readreg(dev, PRODUCT_ID_ADD);
611 lp->chip_type = rev_type &~ REVISON_BITS;
612 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
613
614 /* Check the chip type and revision in order to set the correct send command
615 CS8920 revision C and CS8900 revision F can use the faster send. */
616 lp->send_cmd = TX_AFTER_381;
617 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
618 lp->send_cmd = TX_NOW;
619 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
620 lp->send_cmd = TX_NOW;
621
622 if (net_debug && version_printed++ == 0)
623 printk(version);
624
625 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
626 dev->name,
627 lp->chip_type==CS8900?'0':'2',
628 lp->chip_type==CS8920M?"M":"",
629 lp->chip_revision,
630 dev->base_addr);
631
632 reset_chip(dev);
6aa20a22 633
1da177e4
LT		 634 /* Here we read the current configuration of the chip. If there
635 is no Extended EEPROM then the idea is to not disturb the chip
636 configuration, it should have been correctly setup by automatic
637 EEPROM read on reset. So, if the chip says it read the EEPROM
638 the driver will always do *something* instead of complain that
639 adapter_cnf is 0. */
640
641#ifdef CONFIG_SH_HICOSH4
642 if (1) {
643 /* For the HiCO.SH4 board, things are different: we don't
644 have EEPROM, but there is some data in flash, so we go
645 get it there directly (MAC). */
646 __u16 *confd;
647 short cnt;
648 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
649 == 0x006c3000) {
650 confd = (__u16*) 0xa0013fc0;
651 } else {
652 confd = (__u16*) 0xa001ffc0;
653 }
654 cnt = (*confd++ & 0x00ff) >> 1;
655 while (--cnt > 0) {
656 __u16 j = *confd++;
6aa20a22 657
1da177e4
LT		 658 switch (j & 0x0fff) {
659 case PP_IA:
660 for (i = 0; i < ETH_ALEN/2; i++) {
661 dev->dev_addr[i*2] = confd[i] & 0xFF;
662 dev->dev_addr[i*2+1] = confd[i] >> 8;
663 }
664 break;
665 }
666 j = (j >> 12) + 1;
667 confd += j;
668 cnt -= j;
669 }
670 } else
671#endif
672
6aa20a22 673 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
1da177e4
LT		 674 (EEPROM_OK|EEPROM_PRESENT)) {
675 /* Load the MAC. */
676 for (i=0; i < ETH_ALEN/2; i++) {
677 unsigned int Addr;
678 Addr = readreg(dev, PP_IA+i*2);
679 dev->dev_addr[i*2] = Addr & 0xFF;
680 dev->dev_addr[i*2+1] = Addr >> 8;
681 }
6aa20a22
JG		 682
683 /* Load the Adapter Configuration.
684 Note: Barring any more specific information from some
685 other source (ie EEPROM+Schematics), we would not know
686 how to operate a 10Base2 interface on the AUI port.
687 However, since we do read the status of HCB1 and use
688 settings that always result in calls to control_dc_dc(dev,0)
689 a BNC interface should work if the enable pin
690 (dc/dc converter) is on HCB1. It will be called AUI
1da177e4 691 however. */
6aa20a22 692
1da177e4
LT		 693 lp->adapter_cnf = 0;
694 i = readreg(dev, PP_LineCTL);
695 /* Preserve the setting of the HCB1 pin. */
696 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
697 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
698 /* Save the sqelch bit */
699 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
700 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
701 /* Check if the card is in 10Base-t only mode */
702 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
703 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
704 /* Check if the card is in AUI only mode */
705 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
706 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
707 /* Check if the card is in Auto mode. */
708 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
6aa20a22 709 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
1da177e4 710 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
6aa20a22 711
1da177e4
LT		 712 if (net_debug > 1)
713 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
714 dev->name, i, lp->adapter_cnf);
715
716 /* IRQ. Other chips already probe, see below. */
6aa20a22 717 if (lp->chip_type == CS8900)
1da177e4 718 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
6aa20a22 719
1da177e4
LT		 720 printk( "[Cirrus EEPROM] ");
721 }
722
723 printk("\n");
6aa20a22 724
1da177e4
LT		 725 /* First check to see if an EEPROM is attached. */
726#ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
727 if (1) {
728 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
729 } else
730#endif
731 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
732 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
733 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
734 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
735 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
736 /* Check if the chip was able to read its own configuration starting
737 at 0 in the EEPROM*/
738 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
6aa20a22 739 (EEPROM_OK|EEPROM_PRESENT))
1da177e4 740 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
6aa20a22 741
1da177e4
LT		 742 } else {
743 /* This reads an extended EEPROM that is not documented
744 in the CS8900 datasheet. */
6aa20a22 745
1da177e4
LT		 746 /* get transmission control word but keep the autonegotiation bits */
747 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
748 /* Store adapter configuration */
749 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
750 /* Store ISA configuration */
751 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
752 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
753
754 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
755 /* store the initial memory base address */
756 for (i = 0; i < ETH_ALEN/2; i++) {
757 dev->dev_addr[i*2] = eeprom_buff[i];
758 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
759 }
760 if (net_debug > 1)
761 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
762 dev->name, lp->adapter_cnf);
763 }
764
765 /* allow them to force multiple transceivers. If they force multiple, autosense */
766 {
767 int count = 0;
768 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
769 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
770 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
771 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
772 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
773 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
774 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
775 }
776
777 if (net_debug > 1)
778 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
779 dev->name, lp->force, lp->adapter_cnf);
780
781 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
782
783 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
784
785 /* FIXME: we don't set the Ethernet address on the command line. Use
786 ifconfig IFACE hw ether AABBCCDDEEFF */
787
788 printk(KERN_INFO "cs89x0 media %s%s%s",
789 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
790 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
791 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
792
793 lp->irq_map = 0xffff;
794
795 /* If this is a CS8900 then no pnp soft */
796 if (lp->chip_type != CS8900 &&
797 /* Check if the ISA IRQ has been set */
798 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
799 (i != 0 && i < CS8920_NO_INTS))) {
800 if (!dev->irq)
801 dev->irq = i;
802 } else {
803 i = lp->isa_config & INT_NO_MASK;
804 if (lp->chip_type == CS8900) {
0ac4ed9d 805#ifdef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 806 i = cs8900_irq_map[0];
807#else
808 /* Translate the IRQ using the IRQ mapping table. */
ff8ac609 809 if (i >= ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 810 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
811 else
812 i = cs8900_irq_map[i];
6aa20a22 813
1da177e4
LT		 814 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
815 } else {
816 int irq_map_buff[IRQ_MAP_LEN/2];
817
818 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
819 IRQ_MAP_LEN/2,
820 irq_map_buff) >= 0) {
821 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
822 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
823 }
824#endif
825 }
826 if (!dev->irq)
827 dev->irq = i;
828 }
829
830 printk(" IRQ %d", dev->irq);
831
832#if ALLOW_DMA
833 if (lp->use_dma) {
834 get_dma_channel(dev);
835 printk(", DMA %d", dev->dma);
836 }
837 else
838#endif
839 {
840 printk(", programmed I/O");
841 }
842
843 /* print the ethernet address. */
e174961c 844 printk(", MAC %pM", dev->dev_addr);
1da177e4
LT		 845
846 dev->open = net_open;
847 dev->stop = net_close;
848 dev->tx_timeout = net_timeout;
849 dev->watchdog_timeo = HZ;
850 dev->hard_start_xmit = net_send_packet;
851 dev->get_stats = net_get_stats;
852 dev->set_multicast_list = set_multicast_list;
853 dev->set_mac_address = set_mac_address;
6f519165
DS		 854#ifdef CONFIG_NET_POLL_CONTROLLER
855 dev->poll_controller = net_poll_controller;
856#endif
1da177e4
LT		 857
858 printk("\n");
859 if (net_debug)
860 printk("cs89x0_probe1() successful\n");
b1fc5505 861
862 retval = register_netdev(dev);
863 if (retval)
864 goto out3;
1da177e4 865 return 0;
b1fc5505 866out3:
fc8c7d79 867 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 868out2:
869 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
870out1:
871 return retval;
872}
873
6aa20a22 874
1da177e4
LT		 875/*********************************
876 * This page contains DMA routines
877**********************************/
878
879#if ALLOW_DMA
880
881#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
882
883static void
884get_dma_channel(struct net_device *dev)
885{
886 struct net_local *lp = netdev_priv(dev);
887
888 if (lp->dma) {
889 dev->dma = lp->dma;
890 lp->isa_config |= ISA_RxDMA;
891 } else {
892 if ((lp->isa_config & ANY_ISA_DMA) == 0)
893 return;
894 dev->dma = lp->isa_config & DMA_NO_MASK;
895 if (lp->chip_type == CS8900)
896 dev->dma += 5;
897 if (dev->dma < 5 || dev->dma > 7) {
898 lp->isa_config &= ~ANY_ISA_DMA;
899 return;
900 }
901 }
902 return;
903}
904
905static void
906write_dma(struct net_device *dev, int chip_type, int dma)
907{
908 struct net_local *lp = netdev_priv(dev);
909 if ((lp->isa_config & ANY_ISA_DMA) == 0)
910 return;
911 if (chip_type == CS8900) {
912 writereg(dev, PP_CS8900_ISADMA, dma-5);
913 } else {
914 writereg(dev, PP_CS8920_ISADMA, dma);
915 }
916}
917
918static void
919set_dma_cfg(struct net_device *dev)
920{
921 struct net_local *lp = netdev_priv(dev);
922
923 if (lp->use_dma) {
924 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
925 if (net_debug > 3)
926 printk("set_dma_cfg(): no DMA\n");
927 return;
928 }
929 if (lp->isa_config & ISA_RxDMA) {
930 lp->curr_rx_cfg |= RX_DMA_ONLY;
931 if (net_debug > 3)
932 printk("set_dma_cfg(): RX_DMA_ONLY\n");
933 } else {
934 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
935 if (net_debug > 3)
936 printk("set_dma_cfg(): AUTO_RX_DMA\n");
937 }
938 }
939}
940
941static int
942dma_bufcfg(struct net_device *dev)
943{
944 struct net_local *lp = netdev_priv(dev);
945 if (lp->use_dma)
946 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
947 else
948 return 0;
949}
950
951static int
952dma_busctl(struct net_device *dev)
953{
954 int retval = 0;
955 struct net_local *lp = netdev_priv(dev);
956 if (lp->use_dma) {
957 if (lp->isa_config & ANY_ISA_DMA)
958 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
959 if (lp->isa_config & DMA_BURST)
960 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
961 if (lp->dmasize == 64)
962 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
963 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
964 }
965 return retval;
966}
967
968static void
969dma_rx(struct net_device *dev)
970{
971 struct net_local *lp = netdev_priv(dev);
972 struct sk_buff *skb;
973 int status, length;
974 unsigned char *bp = lp->rx_dma_ptr;
975
976 status = bp[0] + (bp[1]<<8);
977 length = bp[2] + (bp[3]<<8);
978 bp += 4;
979 if (net_debug > 5) {
980 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
981 dev->name, (unsigned long)bp, status, length);
982 }
983 if ((status & RX_OK) == 0) {
984 count_rx_errors(status, lp);
985 goto skip_this_frame;
986 }
987
988 /* Malloc up new buffer. */
989 skb = dev_alloc_skb(length + 2);
990 if (skb == NULL) {
991 if (net_debug) /* I don't think we want to do this to a stressed system */
992 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
993 lp->stats.rx_dropped++;
994
995 /* AKPM: advance bp to the next frame */
996skip_this_frame:
997 bp += (length + 3) & ~3;
998 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
999 lp->rx_dma_ptr = bp;
1000 return;
1001 }
1002 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4
LT		 1003
1004 if (bp + length > lp->end_dma_buff) {
1005 int semi_cnt = lp->end_dma_buff - bp;
1006 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1007 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1008 length - semi_cnt);
1009 } else {
1010 memcpy(skb_put(skb,length), bp, length);
1011 }
1012 bp += (length + 3) & ~3;
1013 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1014 lp->rx_dma_ptr = bp;
1015
1016 if (net_debug > 3) {
1017 printk( "%s: received %d byte DMA packet of type %x\n",
1018 dev->name, length,
1019 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1020 }
1021 skb->protocol=eth_type_trans(skb,dev);
1022 netif_rx(skb);
1da177e4
LT		 1023 lp->stats.rx_packets++;
1024 lp->stats.rx_bytes += length;
1025}
1026
1027#endif /* ALLOW_DMA */
1028
dac499f9 1029static void __init reset_chip(struct net_device *dev)
1da177e4 1030{
0ac4ed9d 1031#if !defined(CONFIG_MACH_MX31ADS)
9c878967 1032#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1033 struct net_local *lp = netdev_priv(dev);
1034 int ioaddr = dev->base_addr;
1035#endif
1036 int reset_start_time;
1037
1038 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1039
1040 /* wait 30 ms */
1041 msleep(30);
1042
9c878967 1043#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1044 if (lp->chip_type != CS8900) {
1045 /* Hardware problem requires PNP registers to be reconfigured after a reset */
fc8c7d79 1046 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1da177e4
LT		 1047 outb(dev->irq, ioaddr + DATA_PORT);
1048 outb(0, ioaddr + DATA_PORT + 1);
1049
fc8c7d79 1050 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1da177e4
LT		 1051 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1052 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1053 }
1054#endif /* IXDP2x01 */
1055
1056 /* Wait until the chip is reset */
1057 reset_start_time = jiffies;
1058 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1059 ;
0ac4ed9d 1060#endif /* !CONFIG_MACH_MX31ADS */
1da177e4
LT		 1061}
1062
6aa20a22 1063
1da177e4
LT		 1064static void
1065control_dc_dc(struct net_device *dev, int on_not_off)
1066{
1067 struct net_local *lp = netdev_priv(dev);
1068 unsigned int selfcontrol;
1069 int timenow = jiffies;
6aa20a22 1070 /* control the DC to DC convertor in the SelfControl register.
1da177e4
LT		 1071 Note: This is hooked up to a general purpose pin, might not
1072 always be a DC to DC convertor. */
1073
1074 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1075 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1076 selfcontrol |= HCB1;
1077 else
1078 selfcontrol &= ~HCB1;
1079 writereg(dev, PP_SelfCTL, selfcontrol);
1080
1081 /* Wait for the DC/DC converter to power up - 500ms */
1082 while (jiffies - timenow < HZ)
1083 ;
1084}
1085
1086#define DETECTED_NONE 0
1087#define DETECTED_RJ45H 1
1088#define DETECTED_RJ45F 2
1089#define DETECTED_AUI 3
1090#define DETECTED_BNC 4
1091
1092static int
1093detect_tp(struct net_device *dev)
1094{
1095 struct net_local *lp = netdev_priv(dev);
1096 int timenow = jiffies;
1097 int fdx;
1098
1099 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1100
1101 /* If connected to another full duplex capable 10-Base-T card the link pulses
1102 seem to be lost when the auto detect bit in the LineCTL is set.
1103 To overcome this the auto detect bit will be cleared whilst testing the
1104 10-Base-T interface. This would not be necessary for the sparrow chip but
1105 is simpler to do it anyway. */
1106 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1107 control_dc_dc(dev, 0);
1108
1109 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1110 for (timenow = jiffies; jiffies - timenow < 15; )
1111 ;
1112 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1113 return DETECTED_NONE;
1114
1115 if (lp->chip_type == CS8900) {
1116 switch (lp->force & 0xf0) {
1117#if 0
1118 case FORCE_AUTO:
1119 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1120 return DETECTED_NONE;
1121#endif
1122 /* CS8900 doesn't support AUTO, change to HALF*/
1123 case FORCE_AUTO:
1124 lp->force &= ~FORCE_AUTO;
1125 lp->force |= FORCE_HALF;
1126 break;
1127 case FORCE_HALF:
1128 break;
1129 case FORCE_FULL:
1130 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1131 break;
1132 }
1133 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1134 } else {
1135 switch (lp->force & 0xf0) {
1136 case FORCE_AUTO:
1137 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1138 break;
1139 case FORCE_HALF:
1140 lp->auto_neg_cnf = 0;
1141 break;
1142 case FORCE_FULL:
1143 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1144 break;
1145 }
1146
1147 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1148
1149 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1150 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1151 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1152 if (jiffies - timenow > 4000) {
1153 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1154 break;
1155 }
1156 }
1157 }
1158 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1159 }
1160 if (fdx)
1161 return DETECTED_RJ45F;
1162 else
1163 return DETECTED_RJ45H;
1164}
1165
1166/* send a test packet - return true if carrier bits are ok */
1167static int
1168send_test_pkt(struct net_device *dev)
1169{
1170 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1171 0, 46, /* A 46 in network order */
1172 0, 0, /* DSAP=0 & SSAP=0 fields */
1173 0xf3, 0 /* Control (Test Req + P bit set) */ };
1174 long timenow = jiffies;
1175
1176 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1177
1178 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1179 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1180
974dffc2
LB		 1181 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1182 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1da177e4
LT		 1183
1184 /* Test to see if the chip has allocated memory for the packet */
1185 while (jiffies - timenow < 5)
1186 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1187 break;
1188 if (jiffies - timenow >= 5)
1189 return 0; /* this shouldn't happen */
1190
1191 /* Write the contents of the packet */
084f746a 1192 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1da177e4
LT		 1193
1194 if (net_debug > 1) printk("Sending test packet ");
1195 /* wait a couple of jiffies for packet to be received */
1196 for (timenow = jiffies; jiffies - timenow < 3; )
1197 ;
1198 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1199 if (net_debug > 1) printk("succeeded\n");
1200 return 1;
1201 }
1202 if (net_debug > 1) printk("failed\n");
1203 return 0;
1204}
1205
1206
1207static int
1208detect_aui(struct net_device *dev)
1209{
1210 struct net_local *lp = netdev_priv(dev);
1211
1212 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1213 control_dc_dc(dev, 0);
1214
1215 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1216
1217 if (send_test_pkt(dev))
1218 return DETECTED_AUI;
1219 else
1220 return DETECTED_NONE;
1221}
1222
1223static int
1224detect_bnc(struct net_device *dev)
1225{
1226 struct net_local *lp = netdev_priv(dev);
1227
1228 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1229 control_dc_dc(dev, 1);
1230
1231 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1232
1233 if (send_test_pkt(dev))
1234 return DETECTED_BNC;
1235 else
1236 return DETECTED_NONE;
1237}
1238
6aa20a22 1239
1da177e4
LT		 1240static void
1241write_irq(struct net_device *dev, int chip_type, int irq)
1242{
1243 int i;
1244
1245 if (chip_type == CS8900) {
1246 /* Search the mapping table for the corresponding IRQ pin. */
ff8ac609 1247 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1da177e4
LT		 1248 if (cs8900_irq_map[i] == irq)
1249 break;
1250 /* Not found */
ff8ac609 1251 if (i == ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 1252 i = 3;
1253 writereg(dev, PP_CS8900_ISAINT, i);
1254 } else {
1255 writereg(dev, PP_CS8920_ISAINT, irq);
1256 }
1257}
1258
1259/* Open/initialize the board. This is called (in the current kernel)
1260 sometime after booting when the 'ifconfig' program is run.
1261
1262 This routine should set everything up anew at each open, even
1263 registers that "should" only need to be set once at boot, so that
1264 there is non-reboot way to recover if something goes wrong.
1265 */
1266
1267/* AKPM: do we need to do any locking here? */
1268
1269static int
1270net_open(struct net_device *dev)
1271{
1272 struct net_local *lp = netdev_priv(dev);
1273 int result = 0;
1274 int i;
1275 int ret;
1276
277cb103 1277#if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1da177e4
LT		 1278 if (dev->irq < 2) {
1279 /* Allow interrupts to be generated by the chip */
1280/* Cirrus' release had this: */
1281#if 0
1282 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1283#endif
1284/* And 2.3.47 had this: */
1285 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1286
1287 for (i = 2; i < CS8920_NO_INTS; i++) {
1288 if ((1 << i) & lp->irq_map) {
1289 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1290 dev->irq = i;
1291 write_irq(dev, lp->chip_type, i);
1292 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1293 break;
1294 }
1295 }
1296 }
1297
1298 if (i >= CS8920_NO_INTS) {
1299 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1300 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1301 ret = -EAGAIN;
1302 goto bad_out;
1303 }
1304 }
1305 else
1306#endif
1307 {
0ac4ed9d 1308#ifndef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 1309 if (((1 << dev->irq) & lp->irq_map) == 0) {
1310 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1311 dev->name, dev->irq, lp->irq_map);
1312 ret = -EAGAIN;
1313 goto bad_out;
1314 }
1315#endif
1316/* FIXME: Cirrus' release had this: */
1317 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1318/* And 2.3.47 had this: */
1319#if 0
1320 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1321#endif
1322 write_irq(dev, lp->chip_type, dev->irq);
1323 ret = request_irq(dev->irq, &net_interrupt, 0, dev->name, dev);
1324 if (ret) {
1325 if (net_debug)
1326 printk(KERN_DEBUG "cs89x0: request_irq(%d) failed\n", dev->irq);
1327 goto bad_out;
1328 }
1329 }
1330
1331#if ALLOW_DMA
1332 if (lp->use_dma) {
1333 if (lp->isa_config & ANY_ISA_DMA) {
1334 unsigned long flags;
1335 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1336 get_order(lp->dmasize * 1024));
1337
1338 if (!lp->dma_buff) {
1339 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1340 goto release_irq;
1341 }
1342 if (net_debug > 1) {
1343 printk( "%s: dma %lx %lx\n",
1344 dev->name,
1345 (unsigned long)lp->dma_buff,
1346 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1347 }
1348 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1349 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1350 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1351 goto release_irq;
1352 }
1353 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1354 if (request_dma(dev->dma, dev->name)) {
1355 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1356 goto release_irq;
1357 }
1358 write_dma(dev, lp->chip_type, dev->dma);
1359 lp->rx_dma_ptr = lp->dma_buff;
1360 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1361 spin_lock_irqsave(&lp->lock, flags);
1362 disable_dma(dev->dma);
1363 clear_dma_ff(dev->dma);
1364 set_dma_mode(dev->dma, 0x14); /* auto_init as well */
1365 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1366 set_dma_count(dev->dma, lp->dmasize*1024);
1367 enable_dma(dev->dma);
1368 spin_unlock_irqrestore(&lp->lock, flags);
1369 }
1370 }
1371#endif /* ALLOW_DMA */
1372
1373 /* set the Ethernet address */
1374 for (i=0; i < ETH_ALEN/2; i++)
1375 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1376
1377 /* while we're testing the interface, leave interrupts disabled */
1378 writereg(dev, PP_BusCTL, MEMORY_ON);
1379
1380 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1381 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1382 lp->linectl = LOW_RX_SQUELCH;
1383 else
1384 lp->linectl = 0;
1385
1386 /* check to make sure that they have the "right" hardware available */
1387 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1388 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1389 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1390 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1391 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1392 }
277cb103 1393#ifdef CONFIG_ARCH_PNX010X
0dd3c781 1394 result = A_CNF_10B_T;
1395#endif
1da177e4
LT		 1396 if (!result) {
1397 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
17a9440f
WC		 1398release_dma:
1399#if ALLOW_DMA
1400 free_dma(dev->dma);
17a9440f 1401release_irq:
1da177e4
LT		 1402 release_dma_buff(lp);
1403#endif
1404 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1405 free_irq(dev->irq, dev);
1406 ret = -EAGAIN;
1407 goto bad_out;
1408 }
1409
1410 /* set the hardware to the configured choice */
1411 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1412 case A_CNF_MEDIA_10B_T:
1413 result = detect_tp(dev);
1414 if (result==DETECTED_NONE) {
1415 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1416 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1417 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1418 }
1419 break;
1420 case A_CNF_MEDIA_AUI:
1421 result = detect_aui(dev);
1422 if (result==DETECTED_NONE) {
1423 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1424 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1425 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1426 }
1427 break;
1428 case A_CNF_MEDIA_10B_2:
1429 result = detect_bnc(dev);
1430 if (result==DETECTED_NONE) {
1431 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1432 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1433 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1434 }
1435 break;
1436 case A_CNF_MEDIA_AUTO:
1437 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1438 if (lp->adapter_cnf & A_CNF_10B_T)
1439 if ((result = detect_tp(dev)) != DETECTED_NONE)
1440 break;
1441 if (lp->adapter_cnf & A_CNF_AUI)
1442 if ((result = detect_aui(dev)) != DETECTED_NONE)
1443 break;
1444 if (lp->adapter_cnf & A_CNF_10B_2)
1445 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1446 break;
1447 printk(KERN_ERR "%s: no media detected\n", dev->name);
17a9440f 1448 goto release_dma;
1da177e4
LT		 1449 }
1450 switch(result) {
1451 case DETECTED_NONE:
1452 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
17a9440f 1453 goto release_dma;
1da177e4
LT		 1454 case DETECTED_RJ45H:
1455 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1456 break;
1457 case DETECTED_RJ45F:
1458 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1459 break;
1460 case DETECTED_AUI:
1461 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1462 break;
1463 case DETECTED_BNC:
1464 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1465 break;
1466 }
1467
1468 /* Turn on both receive and transmit operations */
1469 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1470
1471 /* Receive only error free packets addressed to this card */
1472 lp->rx_mode = 0;
1473 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1474
1475 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1476
1477 if (lp->isa_config & STREAM_TRANSFER)
1478 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1479#if ALLOW_DMA
1480 set_dma_cfg(dev);
1481#endif
1482 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1483
1484 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1485 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1486
1487 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1488#if ALLOW_DMA
1489 dma_bufcfg(dev) |
1490#endif
1491 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1492
1493 /* now that we've got our act together, enable everything */
1494 writereg(dev, PP_BusCTL, ENABLE_IRQ
1495 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1496#if ALLOW_DMA
1497 | dma_busctl(dev)
1498#endif
1499 );
1500 netif_start_queue(dev);
1501 if (net_debug > 1)
1502 printk("cs89x0: net_open() succeeded\n");
1503 return 0;
1504bad_out:
1505 return ret;
1506}
1507
1508static void net_timeout(struct net_device *dev)
1509{
1510 /* If we get here, some higher level has decided we are broken.
1511 There should really be a "kick me" function call instead. */
1512 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1513 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1514 /* Try to restart the adaptor. */
1515 netif_wake_queue(dev);
1516}
1517
1518static int net_send_packet(struct sk_buff *skb, struct net_device *dev)
1519{
1520 struct net_local *lp = netdev_priv(dev);
1521
1522 if (net_debug > 3) {
1523 printk("%s: sent %d byte packet of type %x\n",
1524 dev->name, skb->len,
1525 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1526 }
1527
1528 /* keep the upload from being interrupted, since we
1529 ask the chip to start transmitting before the
1530 whole packet has been completely uploaded. */
1531
1532 spin_lock_irq(&lp->lock);
1533 netif_stop_queue(dev);
1534
1535 /* initiate a transmit sequence */
974dffc2
LB		 1536 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1537 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1da177e4
LT		 1538
1539 /* Test to see if the chip has allocated memory for the packet */
1540 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1541 /*
1542 * Gasp! It hasn't. But that shouldn't happen since
1543 * we're waiting for TxOk, so return 1 and requeue this packet.
1544 */
6aa20a22 1545
1da177e4
LT		 1546 spin_unlock_irq(&lp->lock);
1547 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
1548 return 1;
1549 }
1550 /* Write the contents of the packet */
084f746a 1551 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
1da177e4 1552 spin_unlock_irq(&lp->lock);
e1699f50 1553 lp->stats.tx_bytes += skb->len;
1da177e4
LT		 1554 dev->trans_start = jiffies;
1555 dev_kfree_skb (skb);
1556
1557 /*
1558 * We DO NOT call netif_wake_queue() here.
1559 * We also DO NOT call netif_start_queue().
1560 *
1561 * Either of these would cause another bottom half run through
1562 * net_send_packet() before this packet has fully gone out. That causes
1563 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1564 * a dog. We just return and wait for the Tx completion interrupt handler
1565 * to restart the netdevice layer
1566 */
1567
1568 return 0;
1569}
6aa20a22 1570
1da177e4
LT		 1571/* The typical workload of the driver:
1572 Handle the network interface interrupts. */
6aa20a22 1573
7d12e780 1574static irqreturn_t net_interrupt(int irq, void *dev_id)
1da177e4
LT		 1575{
1576 struct net_device *dev = dev_id;
1577 struct net_local *lp;
1578 int ioaddr, status;
1579 int handled = 0;
1580
1581 ioaddr = dev->base_addr;
1582 lp = netdev_priv(dev);
1583
1584 /* we MUST read all the events out of the ISQ, otherwise we'll never
1585 get interrupted again. As a consequence, we can't have any limit
1586 on the number of times we loop in the interrupt handler. The
1587 hardware guarantees that eventually we'll run out of events. Of
1588 course, if you're on a slow machine, and packets are arriving
1589 faster than you can read them off, you're screwed. Hasta la
1590 vista, baby! */
974dffc2 1591 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1da177e4
LT		 1592 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1593 handled = 1;
1594 switch(status & ISQ_EVENT_MASK) {
1595 case ISQ_RECEIVER_EVENT:
1596 /* Got a packet(s). */
1597 net_rx(dev);
1598 break;
1599 case ISQ_TRANSMITTER_EVENT:
1600 lp->stats.tx_packets++;
1601 netif_wake_queue(dev); /* Inform upper layers. */
1602 if ((status & ( TX_OK |
1603 TX_LOST_CRS |
1604 TX_SQE_ERROR |
1605 TX_LATE_COL |
1606 TX_16_COL)) != TX_OK) {
1607 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1608 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1609 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1610 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1611 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1612 }
1613 break;
1614 case ISQ_BUFFER_EVENT:
1615 if (status & READY_FOR_TX) {
1616 /* we tried to transmit a packet earlier,
1617 but inexplicably ran out of buffers.
1618 That shouldn't happen since we only ever
1619 load one packet. Shrug. Do the right
1620 thing anyway. */
1621 netif_wake_queue(dev); /* Inform upper layers. */
1622 }
1623 if (status & TX_UNDERRUN) {
1624 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1625 lp->send_underrun++;
1626 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1627 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1628 /* transmit cycle is done, although
1629 frame wasn't transmitted - this
1630 avoids having to wait for the upper
1631 layers to timeout on us, in the
1632 event of a tx underrun */
1633 netif_wake_queue(dev); /* Inform upper layers. */
1634 }
1635#if ALLOW_DMA
1636 if (lp->use_dma && (status & RX_DMA)) {
1637 int count = readreg(dev, PP_DmaFrameCnt);
1638 while(count) {
1639 if (net_debug > 5)
1640 printk("%s: receiving %d DMA frames\n", dev->name, count);
1641 if (net_debug > 2 && count >1)
1642 printk("%s: receiving %d DMA frames\n", dev->name, count);
1643 dma_rx(dev);
1644 if (--count == 0)
1645 count = readreg(dev, PP_DmaFrameCnt);
1646 if (net_debug > 2 && count > 0)
1647 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1648 }
1649 }
1650#endif
1651 break;
1652 case ISQ_RX_MISS_EVENT:
1653 lp->stats.rx_missed_errors += (status >>6);
1654 break;
1655 case ISQ_TX_COL_EVENT:
1656 lp->stats.collisions += (status >>6);
1657 break;
1658 }
1659 }
1660 return IRQ_RETVAL(handled);
1661}
1662
1663static void
1664count_rx_errors(int status, struct net_local *lp)
1665{
1666 lp->stats.rx_errors++;
1667 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1668 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1669 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1670 /* per str 172 */
1671 lp->stats.rx_crc_errors++;
1672 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1673 return;
1674}
1675
1676/* We have a good packet(s), get it/them out of the buffers. */
1677static void
1678net_rx(struct net_device *dev)
1679{
1680 struct net_local *lp = netdev_priv(dev);
1681 struct sk_buff *skb;
1682 int status, length;
1683
1684 int ioaddr = dev->base_addr;
fc8c7d79
LB		 1685 status = readword(ioaddr, RX_FRAME_PORT);
1686 length = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1687
1688 if ((status & RX_OK) == 0) {
1689 count_rx_errors(status, lp);
1690 return;
1691 }
1692
1693 /* Malloc up new buffer. */
1694 skb = dev_alloc_skb(length + 2);
1695 if (skb == NULL) {
1696#if 0 /* Again, this seems a cruel thing to do */
1697 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1698#endif
1699 lp->stats.rx_dropped++;
1700 return;
1701 }
1702 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4 1703
084f746a 1704 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1da177e4 1705 if (length & 1)
fc8c7d79 1706 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1707
1708 if (net_debug > 3) {
1709 printk( "%s: received %d byte packet of type %x\n",
1710 dev->name, length,
1711 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1712 }
1713
1714 skb->protocol=eth_type_trans(skb,dev);
1715 netif_rx(skb);
1da177e4
LT		 1716 lp->stats.rx_packets++;
1717 lp->stats.rx_bytes += length;
1718}
1719
1720#if ALLOW_DMA
1721static void release_dma_buff(struct net_local *lp)
1722{
1723 if (lp->dma_buff) {
1724 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1725 lp->dma_buff = NULL;
1726 }
1727}
1728#endif
1729
1730/* The inverse routine to net_open(). */
1731static int
1732net_close(struct net_device *dev)
1733{
1734#if ALLOW_DMA
1735 struct net_local *lp = netdev_priv(dev);
1736#endif
1737
1738 netif_stop_queue(dev);
6aa20a22 1739
1da177e4
LT		 1740 writereg(dev, PP_RxCFG, 0);
1741 writereg(dev, PP_TxCFG, 0);
1742 writereg(dev, PP_BufCFG, 0);
1743 writereg(dev, PP_BusCTL, 0);
1744
1745 free_irq(dev->irq, dev);
1746
1747#if ALLOW_DMA
1748 if (lp->use_dma && lp->dma) {
1749 free_dma(dev->dma);
1750 release_dma_buff(lp);
1751 }
1752#endif
1753
1754 /* Update the statistics here. */
1755 return 0;
1756}
1757
1758/* Get the current statistics. This may be called with the card open or
1759 closed. */
1760static struct net_device_stats *
1761net_get_stats(struct net_device *dev)
1762{
1763 struct net_local *lp = netdev_priv(dev);
1764 unsigned long flags;
1765
1766 spin_lock_irqsave(&lp->lock, flags);
1767 /* Update the statistics from the device registers. */
1768 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1769 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1770 spin_unlock_irqrestore(&lp->lock, flags);
1771
1772 return &lp->stats;
1773}
1774
1775static void set_multicast_list(struct net_device *dev)
1776{
1777 struct net_local *lp = netdev_priv(dev);
1778 unsigned long flags;
1779
1780 spin_lock_irqsave(&lp->lock, flags);
1781 if(dev->flags&IFF_PROMISC)
1782 {
1783 lp->rx_mode = RX_ALL_ACCEPT;
1784 }
1785 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1786 {
1787 /* The multicast-accept list is initialized to accept-all, and we
1788 rely on higher-level filtering for now. */
1789 lp->rx_mode = RX_MULTCAST_ACCEPT;
6aa20a22 1790 }
1da177e4
LT		 1791 else
1792 lp->rx_mode = 0;
1793
1794 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1795
1796 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1797 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1798 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1799 spin_unlock_irqrestore(&lp->lock, flags);
1800}
1801
1802
1803static int set_mac_address(struct net_device *dev, void *p)
1804{
1805 int i;
1806 struct sockaddr *addr = p;
1807
1da177e4
LT		 1808 if (netif_running(dev))
1809 return -EBUSY;
1810
1811 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1812
e174961c
JB		 1813 if (net_debug)
1814 printk("%s: Setting MAC address to %pM.\n",
1815 dev->name, dev->dev_addr);
1816
1da177e4
LT		 1817 /* set the Ethernet address */
1818 for (i=0; i < ETH_ALEN/2; i++)
1819 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1820
1821 return 0;
1822}
1823
1824#ifdef MODULE
1825
1826static struct net_device *dev_cs89x0;
1827
1828/*
6aa20a22
JG		 1829 * Support the 'debug' module parm even if we're compiled for non-debug to
1830 * avoid breaking someone's startup scripts
1da177e4
LT		 1831 */
1832
1833static int io;
1834static int irq;
1835static int debug;
1836static char media[8];
1837static int duplex=-1;
1838
1839static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1840static int dma;
1841static int dmasize=16; /* or 64 */
1842
1843module_param(io, int, 0);
1844module_param(irq, int, 0);
1845module_param(debug, int, 0);
1846module_param_string(media, media, sizeof(media), 0);
1847module_param(duplex, int, 0);
1848module_param(dma , int, 0);
1849module_param(dmasize , int, 0);
1850module_param(use_dma , int, 0);
1851MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1852MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1853#if DEBUGGING
1854MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1855#else
1856MODULE_PARM_DESC(debug, "(ignored)");
1857#endif
1858MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1859/* No other value than -1 for duplex seems to be currently interpreted */
1860MODULE_PARM_DESC(duplex, "(ignored)");
1861#if ALLOW_DMA
1862MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1863MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1864MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1865#else
1866MODULE_PARM_DESC(dma , "(ignored)");
1867MODULE_PARM_DESC(dmasize , "(ignored)");
1868MODULE_PARM_DESC(use_dma , "(ignored)");
1869#endif
1870
e1f8e874 1871MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1da177e4
LT		 1872MODULE_LICENSE("GPL");
1873
1874
1875/*
1876* media=t - specify media type
1877 or media=2
1878 or media=aui
1879 or medai=auto
1880* duplex=0 - specify forced half/full/autonegotiate duplex
1881* debug=# - debug level
1882
1883
1884* Default Chip Configuration:
1885 * DMA Burst = enabled
1886 * IOCHRDY Enabled = enabled
1887 * UseSA = enabled
1888 * CS8900 defaults to half-duplex if not specified on command-line
1889 * CS8920 defaults to autoneg if not specified on command-line
1890 * Use reset defaults for other config parameters
1891
1892* Assumptions:
1893 * media type specified is supported (circuitry is present)
1894 * if memory address is > 1MB, then required mem decode hw is present
1895 * if 10B-2, then agent other than driver will enable DC/DC converter
1896 (hw or software util)
1897
1898
1899*/
1900
e26c129a 1901int __init init_module(void)
1da177e4
LT		 1902{
1903 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1904 struct net_local *lp;
1905 int ret = 0;
1906
1907#if DEBUGGING
1908 net_debug = debug;
1909#else
1910 debug = 0;
1911#endif
1912 if (!dev)
1913 return -ENOMEM;
1914
1915 dev->irq = irq;
1916 dev->base_addr = io;
1917 lp = netdev_priv(dev);
1918
1919#if ALLOW_DMA
1920 if (use_dma) {
1921 lp->use_dma = use_dma;
1922 lp->dma = dma;
1923 lp->dmasize = dmasize;
1924 }
1925#endif
1926
1927 spin_lock_init(&lp->lock);
1928
1929 /* boy, they'd better get these right */
1930 if (!strcmp(media, "rj45"))
1931 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1932 else if (!strcmp(media, "aui"))
1933 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1934 else if (!strcmp(media, "bnc"))
1935 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1936 else
1937 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1938
1939 if (duplex==-1)
1940 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1941
1942 if (io == 0) {
1943 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1944 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1945 ret = -EPERM;
1946 goto out;
1947 } else if (io <= 0x1ff) {
1948 ret = -ENXIO;
1949 goto out;
1950 }
1951
1952#if ALLOW_DMA
1953 if (use_dma && dmasize != 16 && dmasize != 64) {
1954 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1955 ret = -EPERM;
1956 goto out;
1957 }
1958#endif
1959 ret = cs89x0_probe1(dev, io, 1);
1960 if (ret)
1961 goto out;
1962
1da177e4
LT		 1963 dev_cs89x0 = dev;
1964 return 0;
1965out:
1966 free_netdev(dev);
1967 return ret;
1968}
1969
afc8eb46 1970void __exit
1da177e4
LT		 1971cleanup_module(void)
1972{
1973 unregister_netdev(dev_cs89x0);
fc8c7d79 1974 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 1975 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1976 free_netdev(dev_cs89x0);
1977}
1978#endif /* MODULE */
6aa20a22 1979
1da177e4
LT		 1980/*
1981 * Local variables:
1982 * version-control: t
1983 * kept-new-versions: 5
1984 * c-indent-level: 8
1985 * tab-width: 8
1986 * End:
1987 *
1988 */
Linux kernel - Deliverables
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