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net: use netdev_mc_count and netdev_mc_empty when appropriate
[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 179static unsigned int cs8900_irq_map[] = {IRQ_IXDP2351_CS8900, 0, 0, 0};
1da177e4 180#elif defined(CONFIG_ARCH_IXDP2X01)
a80763c9 181static unsigned int netcard_portlist[] __used __initdata = {IXDP2X01_CS8900_VIRT_BASE, 0};
1da177e4 182static unsigned int cs8900_irq_map[] = {IRQ_IXDP2X01_CS8900, 0, 0, 0};
277cb103 183#elif defined(CONFIG_ARCH_PNX010X)
a09e64fb 184#include <mach/gpio.h>
0dd3c781 185#define CIRRUS_DEFAULT_BASE IO_ADDRESS(EXT_STATIC2_s0_BASE + 0x200000) /* = Physical address 0x48200000 */
186#define CIRRUS_DEFAULT_IRQ VH_INTC_INT_NUM_CASCADED_INTERRUPT_1 /* Event inputs bank 1 - ID 35/bit 3 */
a80763c9 187static unsigned int netcard_portlist[] __used __initdata = {CIRRUS_DEFAULT_BASE, 0};
0dd3c781 188static unsigned int cs8900_irq_map[] = {CIRRUS_DEFAULT_IRQ, 0, 0, 0};
0ac4ed9d
GC		 189#elif defined(CONFIG_MACH_MX31ADS)
190#include <mach/board-mx31ads.h>
191static unsigned int netcard_portlist[] __used __initdata = {
192 PBC_BASE_ADDRESS + PBC_CS8900A_IOBASE + 0x300, 0
193};
194static unsigned cs8900_irq_map[] = {EXPIO_INT_ENET_INT, 0, 0, 0};
1da177e4 195#else
a80763c9 196static unsigned int netcard_portlist[] __used __initdata =
1da177e4
LT		 197 { 0x300, 0x320, 0x340, 0x360, 0x200, 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x2e0, 0};
198static unsigned int cs8900_irq_map[] = {10,11,12,5};
199#endif
200
201#if DEBUGGING
202static unsigned int net_debug = DEBUGGING;
203#else
204#define net_debug 0 /* gcc will remove all the debug code for us */
205#endif
206
207/* The number of low I/O ports used by the ethercard. */
208#define NETCARD_IO_EXTENT 16
209
210/* we allow the user to override various values normally set in the EEPROM */
211#define FORCE_RJ45 0x0001 /* pick one of these three */
212#define FORCE_AUI 0x0002
213#define FORCE_BNC 0x0004
214
215#define FORCE_AUTO 0x0010 /* pick one of these three */
216#define FORCE_HALF 0x0020
217#define FORCE_FULL 0x0030
218
219/* Information that need to be kept for each board. */
220struct net_local {
221 struct net_device_stats stats;
222 int chip_type; /* one of: CS8900, CS8920, CS8920M */
223 char chip_revision; /* revision letter of the chip ('A'...) */
224 int send_cmd; /* the proper send command: TX_NOW, TX_AFTER_381, or TX_AFTER_ALL */
225 int auto_neg_cnf; /* auto-negotiation word from EEPROM */
226 int adapter_cnf; /* adapter configuration from EEPROM */
227 int isa_config; /* ISA configuration from EEPROM */
228 int irq_map; /* IRQ map from EEPROM */
229 int rx_mode; /* what mode are we in? 0, RX_MULTCAST_ACCEPT, or RX_ALL_ACCEPT */
230 int curr_rx_cfg; /* a copy of PP_RxCFG */
231 int linectl; /* either 0 or LOW_RX_SQUELCH, depending on configuration. */
232 int send_underrun; /* keep track of how many underruns in a row we get */
233 int force; /* force various values; see FORCE* above. */
234 spinlock_t lock;
235#if ALLOW_DMA
236 int use_dma; /* Flag: we're using dma */
237 int dma; /* DMA channel */
238 int dmasize; /* 16 or 64 */
239 unsigned char *dma_buff; /* points to the beginning of the buffer */
240 unsigned char *end_dma_buff; /* points to the end of the buffer */
241 unsigned char *rx_dma_ptr; /* points to the next packet */
242#endif
243};
244
245/* Index to functions, as function prototypes. */
246
247static int cs89x0_probe1(struct net_device *dev, int ioaddr, int modular);
248static int net_open(struct net_device *dev);
61357325 249static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev);
7d12e780 250static irqreturn_t net_interrupt(int irq, void *dev_id);
1da177e4
LT		 251static void set_multicast_list(struct net_device *dev);
252static void net_timeout(struct net_device *dev);
253static void net_rx(struct net_device *dev);
254static int net_close(struct net_device *dev);
255static struct net_device_stats *net_get_stats(struct net_device *dev);
256static void reset_chip(struct net_device *dev);
257static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer);
258static int get_eeprom_cksum(int off, int len, int *buffer);
259static int set_mac_address(struct net_device *dev, void *addr);
260static void count_rx_errors(int status, struct net_local *lp);
6f519165
DS		 261#ifdef CONFIG_NET_POLL_CONTROLLER
262static void net_poll_controller(struct net_device *dev);
263#endif
1da177e4
LT		 264#if ALLOW_DMA
265static void get_dma_channel(struct net_device *dev);
266static void release_dma_buff(struct net_local *lp);
267#endif
268
269/* Example routines you must write ;->. */
270#define tx_done(dev) 1
271
272/*
273 * Permit 'cs89x0_dma=N' in the kernel boot environment
274 */
275#if !defined(MODULE) && (ALLOW_DMA != 0)
276static int g_cs89x0_dma;
277
278static int __init dma_fn(char *str)
279{
280 g_cs89x0_dma = simple_strtol(str,NULL,0);
281 return 1;
282}
283
284__setup("cs89x0_dma=", dma_fn);
285#endif /* !defined(MODULE) && (ALLOW_DMA != 0) */
286
287#ifndef MODULE
288static int g_cs89x0_media__force;
289
290static int __init media_fn(char *str)
291{
292 if (!strcmp(str, "rj45")) g_cs89x0_media__force = FORCE_RJ45;
293 else if (!strcmp(str, "aui")) g_cs89x0_media__force = FORCE_AUI;
294 else if (!strcmp(str, "bnc")) g_cs89x0_media__force = FORCE_BNC;
295 return 1;
296}
297
298__setup("cs89x0_media=", media_fn);
299
6aa20a22 300
1da177e4
LT		 301/* Check for a network adaptor of this type, and return '0' iff one exists.
302 If dev->base_addr == 0, probe all likely locations.
303 If dev->base_addr == 1, always return failure.
304 If dev->base_addr == 2, allocate space for the device and return success
305 (detachable devices only).
306 Return 0 on success.
307 */
308
309struct net_device * __init cs89x0_probe(int unit)
310{
311 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
312 unsigned *port;
313 int err = 0;
314 int irq;
315 int io;
316
317 if (!dev)
318 return ERR_PTR(-ENODEV);
319
320 sprintf(dev->name, "eth%d", unit);
321 netdev_boot_setup_check(dev);
322 io = dev->base_addr;
323 irq = dev->irq;
324
325 if (net_debug)
326 printk("cs89x0:cs89x0_probe(0x%x)\n", io);
327
328 if (io > 0x1ff) { /* Check a single specified location. */
329 err = cs89x0_probe1(dev, io, 0);
330 } else if (io != 0) { /* Don't probe at all. */
331 err = -ENXIO;
332 } else {
333 for (port = netcard_portlist; *port; port++) {
334 if (cs89x0_probe1(dev, *port, 0) == 0)
335 break;
336 dev->irq = irq;
337 }
338 if (!*port)
339 err = -ENODEV;
340 }
341 if (err)
342 goto out;
1da177e4 343 return dev;
1da177e4
LT		 344out:
345 free_netdev(dev);
346 printk(KERN_WARNING "cs89x0: no cs8900 or cs8920 detected. Be sure to disable PnP with SETUP\n");
347 return ERR_PTR(err);
348}
349#endif
350
9c878967
DS		 351#if defined(CONFIG_MACH_IXDP2351)
352static u16
353readword(unsigned long base_addr, int portno)
354{
355 return __raw_readw(base_addr + (portno << 1));
356}
357
358static void
359writeword(unsigned long base_addr, int portno, u16 value)
360{
361 __raw_writew(value, base_addr + (portno << 1));
362}
363#elif defined(CONFIG_ARCH_IXDP2X01)
a07f0dbe 364static u16
3b68d70d
LB		 365readword(unsigned long base_addr, int portno)
366{
a07f0dbe 367 return __raw_readl(base_addr + (portno << 1));
3b68d70d
LB		 368}
369
370static void
a07f0dbe 371writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d 372{
a07f0dbe 373 __raw_writel(value, base_addr + (portno << 1));
3b68d70d 374}
580d7b8c 375#elif defined(CONFIG_ARCH_PNX010X)
a07f0dbe 376static u16
3b68d70d
LB		 377readword(unsigned long base_addr, int portno)
378{
379 return inw(base_addr + (portno << 1));
380}
381
382static void
a07f0dbe 383writeword(unsigned long base_addr, int portno, u16 value)
3b68d70d
LB		 384{
385 outw(value, base_addr + (portno << 1));
386}
387#else
a07f0dbe 388static u16
0d5affcf 389readword(unsigned long base_addr, int portno)
1da177e4 390{
0d5affcf 391 return inw(base_addr + portno);
1da177e4
LT		 392}
393
394static void
a07f0dbe 395writeword(unsigned long base_addr, int portno, u16 value)
1da177e4 396{
0d5affcf 397 outw(value, base_addr + portno);
1da177e4 398}
3b68d70d 399#endif
1da177e4 400
084f746a
LB		 401static void
402readwords(unsigned long base_addr, int portno, void *buf, int length)
403{
404 u8 *buf8 = (u8 *)buf;
405
406 do {
a07f0dbe 407 u16 tmp16;
084f746a 408
a07f0dbe
LB		 409 tmp16 = readword(base_addr, portno);
410 *buf8++ = (u8)tmp16;
411 *buf8++ = (u8)(tmp16 >> 8);
084f746a
LB		 412 } while (--length);
413}
414
415static void
416writewords(unsigned long base_addr, int portno, void *buf, int length)
417{
418 u8 *buf8 = (u8 *)buf;
419
420 do {
a07f0dbe 421 u16 tmp16;
084f746a 422
a07f0dbe
LB		 423 tmp16 = *buf8++;
424 tmp16 |= (*buf8++) << 8;
425 writeword(base_addr, portno, tmp16);
084f746a
LB		 426 } while (--length);
427}
428
a07f0dbe
LB		 429static u16
430readreg(struct net_device *dev, u16 regno)
1da177e4 431{
3eaa5e7d
LB		 432 writeword(dev->base_addr, ADD_PORT, regno);
433 return readword(dev->base_addr, DATA_PORT);
1da177e4
LT		 434}
435
436static void
a07f0dbe 437writereg(struct net_device *dev, u16 regno, u16 value)
1da177e4 438{
3eaa5e7d
LB		 439 writeword(dev->base_addr, ADD_PORT, regno);
440 writeword(dev->base_addr, DATA_PORT, value);
1da177e4
LT		 441}
442
443static int __init
444wait_eeprom_ready(struct net_device *dev)
445{
446 int timeout = jiffies;
447 /* check to see if the EEPROM is ready, a timeout is used -
448 just in case EEPROM is ready when SI_BUSY in the
449 PP_SelfST is clear */
450 while(readreg(dev, PP_SelfST) & SI_BUSY)
451 if (jiffies - timeout >= 40)
452 return -1;
453 return 0;
454}
455
456static int __init
457get_eeprom_data(struct net_device *dev, int off, int len, int *buffer)
458{
459 int i;
460
461 if (net_debug > 3) printk("EEPROM data from %x for %x:\n",off,len);
462 for (i = 0; i < len; i++) {
463 if (wait_eeprom_ready(dev) < 0) return -1;
464 /* Now send the EEPROM read command and EEPROM location to read */
465 writereg(dev, PP_EECMD, (off + i) | EEPROM_READ_CMD);
466 if (wait_eeprom_ready(dev) < 0) return -1;
467 buffer[i] = readreg(dev, PP_EEData);
468 if (net_debug > 3) printk("%04x ", buffer[i]);
469 }
470 if (net_debug > 3) printk("\n");
471 return 0;
472}
473
474static int __init
475get_eeprom_cksum(int off, int len, int *buffer)
476{
477 int i, cksum;
478
479 cksum = 0;
480 for (i = 0; i < len; i++)
481 cksum += buffer[i];
482 cksum &= 0xffff;
483 if (cksum == 0)
484 return 0;
485 return -1;
486}
487
6f519165
DS		 488#ifdef CONFIG_NET_POLL_CONTROLLER
489/*
490 * Polling receive - used by netconsole and other diagnostic tools
491 * to allow network i/o with interrupts disabled.
492 */
493static void net_poll_controller(struct net_device *dev)
494{
495 disable_irq(dev->irq);
7d12e780 496 net_interrupt(dev->irq, dev);
6f519165
DS		 497 enable_irq(dev->irq);
498}
499#endif
500
15d23e7a
SH		 501static const struct net_device_ops net_ops = {
502 .ndo_open = net_open,
503 .ndo_stop = net_close,
504 .ndo_tx_timeout = net_timeout,
505 .ndo_start_xmit = net_send_packet,
506 .ndo_get_stats = net_get_stats,
507 .ndo_set_multicast_list = set_multicast_list,
508 .ndo_set_mac_address = set_mac_address,
509#ifdef CONFIG_NET_POLL_CONTROLLER
510 .ndo_poll_controller = net_poll_controller,
511#endif
512 .ndo_change_mtu = eth_change_mtu,
513 .ndo_validate_addr = eth_validate_addr,
514};
515
1da177e4
LT		 516/* This is the real probe routine. Linux has a history of friendly device
517 probes on the ISA bus. A good device probes avoids doing writes, and
518 verifies that the correct device exists and functions.
519 Return 0 on success.
520 */
521
522static int __init
523cs89x0_probe1(struct net_device *dev, int ioaddr, int modular)
524{
525 struct net_local *lp = netdev_priv(dev);
526 static unsigned version_printed;
527 int i;
01bdc033 528 int tmp;
1da177e4
LT		 529 unsigned rev_type = 0;
530 int eeprom_buff[CHKSUM_LEN];
531 int retval;
532
1da177e4
LT		 533 /* Initialize the device structure. */
534 if (!modular) {
535 memset(lp, 0, sizeof(*lp));
536 spin_lock_init(&lp->lock);
537#ifndef MODULE
538#if ALLOW_DMA
539 if (g_cs89x0_dma) {
540 lp->use_dma = 1;
541 lp->dma = g_cs89x0_dma;
542 lp->dmasize = 16; /* Could make this an option... */
543 }
544#endif
545 lp->force = g_cs89x0_media__force;
546#endif
547 }
548
277cb103 549#ifdef CONFIG_ARCH_PNX010X
0dd3c781 550 initialize_ebi();
551
552 /* Map GPIO registers for the pins connected to the CS8900a. */
553 if (map_cirrus_gpio() < 0)
554 return -ENODEV;
555
556 reset_cirrus();
557
558 /* Map event-router registers. */
559 if (map_event_router() < 0)
560 return -ENODEV;
561
562 enable_cirrus_irq();
563
564 unmap_cirrus_gpio();
565 unmap_event_router();
566
567 dev->base_addr = ioaddr;
568
569 for (i = 0 ; i < 3 ; i++)
570 readreg(dev, 0);
571#endif
572
1da177e4
LT		 573 /* Grab the region so we can find another board if autoIRQ fails. */
574 /* WTF is going on here? */
575 if (!request_region(ioaddr & ~3, NETCARD_IO_EXTENT, DRV_NAME)) {
576 printk(KERN_ERR "%s: request_region(0x%x, 0x%x) failed\n",
577 DRV_NAME, ioaddr, NETCARD_IO_EXTENT);
578 retval = -EBUSY;
579 goto out1;
580 }
581
582#ifdef CONFIG_SH_HICOSH4
583 /* truely reset the chip */
fc8c7d79
LB		 584 writeword(ioaddr, ADD_PORT, 0x0114);
585 writeword(ioaddr, DATA_PORT, 0x0040);
1da177e4
LT		 586#endif
587
588 /* if they give us an odd I/O address, then do ONE write to
589 the address port, to get it back to address zero, where we
590 expect to find the EISA signature word. An IO with a base of 0x3
591 will skip the test for the ADD_PORT. */
592 if (ioaddr & 1) {
593 if (net_debug > 1)
594 printk(KERN_INFO "%s: odd ioaddr 0x%x\n", dev->name, ioaddr);
595 if ((ioaddr & 2) != 2)
fc8c7d79 596 if ((readword(ioaddr & ~3, ADD_PORT) & ADD_MASK) != ADD_SIG) {
1da177e4 597 printk(KERN_ERR "%s: bad signature 0x%x\n",
fc8c7d79 598 dev->name, readword(ioaddr & ~3, ADD_PORT));
1da177e4
LT		 599 retval = -ENODEV;
600 goto out2;
601 }
602 }
1da177e4
LT		 603
604 ioaddr &= ~3;
9e1402ab
GD		 605 printk(KERN_DEBUG "PP_addr at %x[%x]: 0x%x\n",
606 ioaddr, ADD_PORT, readword(ioaddr, ADD_PORT));
fc8c7d79 607 writeword(ioaddr, ADD_PORT, PP_ChipID);
1da177e4 608
fc8c7d79 609 tmp = readword(ioaddr, DATA_PORT);
01bdc033 610 if (tmp != CHIP_EISA_ID_SIG) {
fc8c7d79 611 printk(KERN_DEBUG "%s: incorrect signature at %x[%x]: 0x%x!="
01bdc033 612 CHIP_EISA_ID_SIG_STR "\n",
fc8c7d79 613 dev->name, ioaddr, DATA_PORT, tmp);
1da177e4
LT		 614 retval = -ENODEV;
615 goto out2;
616 }
617
618 /* Fill in the 'dev' fields. */
619 dev->base_addr = ioaddr;
620
621 /* get the chip type */
622 rev_type = readreg(dev, PRODUCT_ID_ADD);
623 lp->chip_type = rev_type &~ REVISON_BITS;
624 lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A';
625
626 /* Check the chip type and revision in order to set the correct send command
627 CS8920 revision C and CS8900 revision F can use the faster send. */
628 lp->send_cmd = TX_AFTER_381;
629 if (lp->chip_type == CS8900 && lp->chip_revision >= 'F')
630 lp->send_cmd = TX_NOW;
631 if (lp->chip_type != CS8900 && lp->chip_revision >= 'C')
632 lp->send_cmd = TX_NOW;
633
634 if (net_debug && version_printed++ == 0)
635 printk(version);
636
637 printk(KERN_INFO "%s: cs89%c0%s rev %c found at %#3lx ",
638 dev->name,
639 lp->chip_type==CS8900?'0':'2',
640 lp->chip_type==CS8920M?"M":"",
641 lp->chip_revision,
642 dev->base_addr);
643
644 reset_chip(dev);
6aa20a22 645
1da177e4
LT		 646 /* Here we read the current configuration of the chip. If there
647 is no Extended EEPROM then the idea is to not disturb the chip
648 configuration, it should have been correctly setup by automatic
649 EEPROM read on reset. So, if the chip says it read the EEPROM
650 the driver will always do *something* instead of complain that
651 adapter_cnf is 0. */
652
653#ifdef CONFIG_SH_HICOSH4
654 if (1) {
655 /* For the HiCO.SH4 board, things are different: we don't
656 have EEPROM, but there is some data in flash, so we go
657 get it there directly (MAC). */
658 __u16 *confd;
659 short cnt;
660 if (((* (volatile __u32 *) 0xa0013ff0) & 0x00ffffff)
661 == 0x006c3000) {
662 confd = (__u16*) 0xa0013fc0;
663 } else {
664 confd = (__u16*) 0xa001ffc0;
665 }
666 cnt = (*confd++ & 0x00ff) >> 1;
667 while (--cnt > 0) {
668 __u16 j = *confd++;
6aa20a22 669
1da177e4
LT		 670 switch (j & 0x0fff) {
671 case PP_IA:
672 for (i = 0; i < ETH_ALEN/2; i++) {
673 dev->dev_addr[i*2] = confd[i] & 0xFF;
674 dev->dev_addr[i*2+1] = confd[i] >> 8;
675 }
676 break;
677 }
678 j = (j >> 12) + 1;
679 confd += j;
680 cnt -= j;
681 }
682 } else
683#endif
684
6aa20a22 685 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) ==
1da177e4
LT		 686 (EEPROM_OK|EEPROM_PRESENT)) {
687 /* Load the MAC. */
688 for (i=0; i < ETH_ALEN/2; i++) {
689 unsigned int Addr;
690 Addr = readreg(dev, PP_IA+i*2);
691 dev->dev_addr[i*2] = Addr & 0xFF;
692 dev->dev_addr[i*2+1] = Addr >> 8;
693 }
6aa20a22
JG		 694
695 /* Load the Adapter Configuration.
696 Note: Barring any more specific information from some
697 other source (ie EEPROM+Schematics), we would not know
698 how to operate a 10Base2 interface on the AUI port.
699 However, since we do read the status of HCB1 and use
700 settings that always result in calls to control_dc_dc(dev,0)
701 a BNC interface should work if the enable pin
702 (dc/dc converter) is on HCB1. It will be called AUI
1da177e4 703 however. */
6aa20a22 704
1da177e4
LT		 705 lp->adapter_cnf = 0;
706 i = readreg(dev, PP_LineCTL);
707 /* Preserve the setting of the HCB1 pin. */
708 if ((i & (HCB1 | HCB1_ENBL)) == (HCB1 | HCB1_ENBL))
709 lp->adapter_cnf |= A_CNF_DC_DC_POLARITY;
710 /* Save the sqelch bit */
711 if ((i & LOW_RX_SQUELCH) == LOW_RX_SQUELCH)
712 lp->adapter_cnf |= A_CNF_EXTND_10B_2 | A_CNF_LOW_RX_SQUELCH;
713 /* Check if the card is in 10Base-t only mode */
714 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == 0)
715 lp->adapter_cnf |= A_CNF_10B_T | A_CNF_MEDIA_10B_T;
716 /* Check if the card is in AUI only mode */
717 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUI_ONLY)
718 lp->adapter_cnf |= A_CNF_AUI | A_CNF_MEDIA_AUI;
719 /* Check if the card is in Auto mode. */
720 if ((i & (AUI_ONLY | AUTO_AUI_10BASET)) == AUTO_AUI_10BASET)
6aa20a22 721 lp->adapter_cnf |= A_CNF_AUI | A_CNF_10B_T |
1da177e4 722 A_CNF_MEDIA_AUI | A_CNF_MEDIA_10B_T | A_CNF_MEDIA_AUTO;
6aa20a22 723
1da177e4
LT		 724 if (net_debug > 1)
725 printk(KERN_INFO "%s: PP_LineCTL=0x%x, adapter_cnf=0x%x\n",
726 dev->name, i, lp->adapter_cnf);
727
728 /* IRQ. Other chips already probe, see below. */
6aa20a22 729 if (lp->chip_type == CS8900)
1da177e4 730 lp->isa_config = readreg(dev, PP_CS8900_ISAINT) & INT_NO_MASK;
6aa20a22 731
1da177e4
LT		 732 printk( "[Cirrus EEPROM] ");
733 }
734
735 printk("\n");
6aa20a22 736
1da177e4
LT		 737 /* First check to see if an EEPROM is attached. */
738#ifdef CONFIG_SH_HICOSH4 /* no EEPROM on HiCO, don't hazzle with it here */
739 if (1) {
740 printk(KERN_NOTICE "cs89x0: No EEPROM on HiCO.SH4\n");
741 } else
742#endif
743 if ((readreg(dev, PP_SelfST) & EEPROM_PRESENT) == 0)
744 printk(KERN_WARNING "cs89x0: No EEPROM, relying on command line....\n");
745 else if (get_eeprom_data(dev, START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
746 printk(KERN_WARNING "\ncs89x0: EEPROM read failed, relying on command line.\n");
747 } else if (get_eeprom_cksum(START_EEPROM_DATA,CHKSUM_LEN,eeprom_buff) < 0) {
748 /* Check if the chip was able to read its own configuration starting
749 at 0 in the EEPROM*/
750 if ((readreg(dev, PP_SelfST) & (EEPROM_OK | EEPROM_PRESENT)) !=
6aa20a22 751 (EEPROM_OK|EEPROM_PRESENT))
1da177e4 752 printk(KERN_WARNING "cs89x0: Extended EEPROM checksum bad and no Cirrus EEPROM, relying on command line\n");
6aa20a22 753
1da177e4
LT		 754 } else {
755 /* This reads an extended EEPROM that is not documented
756 in the CS8900 datasheet. */
6aa20a22 757
1da177e4
LT		 758 /* get transmission control word but keep the autonegotiation bits */
759 if (!lp->auto_neg_cnf) lp->auto_neg_cnf = eeprom_buff[AUTO_NEG_CNF_OFFSET/2];
760 /* Store adapter configuration */
761 if (!lp->adapter_cnf) lp->adapter_cnf = eeprom_buff[ADAPTER_CNF_OFFSET/2];
762 /* Store ISA configuration */
763 lp->isa_config = eeprom_buff[ISA_CNF_OFFSET/2];
764 dev->mem_start = eeprom_buff[PACKET_PAGE_OFFSET/2] << 8;
765
766 /* eeprom_buff has 32-bit ints, so we can't just memcpy it */
767 /* store the initial memory base address */
768 for (i = 0; i < ETH_ALEN/2; i++) {
769 dev->dev_addr[i*2] = eeprom_buff[i];
770 dev->dev_addr[i*2+1] = eeprom_buff[i] >> 8;
771 }
772 if (net_debug > 1)
773 printk(KERN_DEBUG "%s: new adapter_cnf: 0x%x\n",
774 dev->name, lp->adapter_cnf);
775 }
776
777 /* allow them to force multiple transceivers. If they force multiple, autosense */
778 {
779 int count = 0;
780 if (lp->force & FORCE_RJ45) {lp->adapter_cnf |= A_CNF_10B_T; count++; }
781 if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_AUI; count++; }
782 if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_10B_2; count++; }
783 if (count > 1) {lp->adapter_cnf |= A_CNF_MEDIA_AUTO; }
784 else if (lp->force & FORCE_RJ45){lp->adapter_cnf |= A_CNF_MEDIA_10B_T; }
785 else if (lp->force & FORCE_AUI) {lp->adapter_cnf |= A_CNF_MEDIA_AUI; }
786 else if (lp->force & FORCE_BNC) {lp->adapter_cnf |= A_CNF_MEDIA_10B_2; }
787 }
788
789 if (net_debug > 1)
790 printk(KERN_DEBUG "%s: after force 0x%x, adapter_cnf=0x%x\n",
791 dev->name, lp->force, lp->adapter_cnf);
792
793 /* FIXME: We don't let you set dc-dc polarity or low RX squelch from the command line: add it here */
794
795 /* FIXME: We don't let you set the IMM bit from the command line: add it to lp->auto_neg_cnf here */
796
797 /* FIXME: we don't set the Ethernet address on the command line. Use
798 ifconfig IFACE hw ether AABBCCDDEEFF */
799
800 printk(KERN_INFO "cs89x0 media %s%s%s",
801 (lp->adapter_cnf & A_CNF_10B_T)?"RJ-45,":"",
802 (lp->adapter_cnf & A_CNF_AUI)?"AUI,":"",
803 (lp->adapter_cnf & A_CNF_10B_2)?"BNC,":"");
804
805 lp->irq_map = 0xffff;
806
807 /* If this is a CS8900 then no pnp soft */
808 if (lp->chip_type != CS8900 &&
809 /* Check if the ISA IRQ has been set */
810 (i = readreg(dev, PP_CS8920_ISAINT) & 0xff,
811 (i != 0 && i < CS8920_NO_INTS))) {
812 if (!dev->irq)
813 dev->irq = i;
814 } else {
815 i = lp->isa_config & INT_NO_MASK;
816 if (lp->chip_type == CS8900) {
0ac4ed9d 817#ifdef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 818 i = cs8900_irq_map[0];
819#else
820 /* Translate the IRQ using the IRQ mapping table. */
ff8ac609 821 if (i >= ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 822 printk("\ncs89x0: invalid ISA interrupt number %d\n", i);
823 else
824 i = cs8900_irq_map[i];
6aa20a22 825
1da177e4
LT		 826 lp->irq_map = CS8900_IRQ_MAP; /* fixed IRQ map for CS8900 */
827 } else {
828 int irq_map_buff[IRQ_MAP_LEN/2];
829
830 if (get_eeprom_data(dev, IRQ_MAP_EEPROM_DATA,
831 IRQ_MAP_LEN/2,
832 irq_map_buff) >= 0) {
833 if ((irq_map_buff[0] & 0xff) == PNP_IRQ_FRMT)
834 lp->irq_map = (irq_map_buff[0]>>8) | (irq_map_buff[1] << 8);
835 }
836#endif
837 }
838 if (!dev->irq)
839 dev->irq = i;
840 }
841
842 printk(" IRQ %d", dev->irq);
843
844#if ALLOW_DMA
845 if (lp->use_dma) {
846 get_dma_channel(dev);
847 printk(", DMA %d", dev->dma);
848 }
849 else
850#endif
851 {
852 printk(", programmed I/O");
853 }
854
855 /* print the ethernet address. */
e174961c 856 printk(", MAC %pM", dev->dev_addr);
1da177e4 857
15d23e7a
SH		 858 dev->netdev_ops = &net_ops;
859 dev->watchdog_timeo = HZ;
1da177e4
LT		 860
861 printk("\n");
862 if (net_debug)
863 printk("cs89x0_probe1() successful\n");
b1fc5505 864
865 retval = register_netdev(dev);
866 if (retval)
867 goto out3;
1da177e4 868 return 0;
b1fc5505 869out3:
fc8c7d79 870 writeword(dev->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 871out2:
872 release_region(ioaddr & ~3, NETCARD_IO_EXTENT);
873out1:
874 return retval;
875}
876
6aa20a22 877
1da177e4
LT		 878/*********************************
879 * This page contains DMA routines
880**********************************/
881
882#if ALLOW_DMA
883
884#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
885
886static void
887get_dma_channel(struct net_device *dev)
888{
889 struct net_local *lp = netdev_priv(dev);
890
891 if (lp->dma) {
892 dev->dma = lp->dma;
893 lp->isa_config |= ISA_RxDMA;
894 } else {
895 if ((lp->isa_config & ANY_ISA_DMA) == 0)
896 return;
897 dev->dma = lp->isa_config & DMA_NO_MASK;
898 if (lp->chip_type == CS8900)
899 dev->dma += 5;
900 if (dev->dma < 5 || dev->dma > 7) {
901 lp->isa_config &= ~ANY_ISA_DMA;
902 return;
903 }
904 }
905 return;
906}
907
908static void
909write_dma(struct net_device *dev, int chip_type, int dma)
910{
911 struct net_local *lp = netdev_priv(dev);
912 if ((lp->isa_config & ANY_ISA_DMA) == 0)
913 return;
914 if (chip_type == CS8900) {
915 writereg(dev, PP_CS8900_ISADMA, dma-5);
916 } else {
917 writereg(dev, PP_CS8920_ISADMA, dma);
918 }
919}
920
921static void
922set_dma_cfg(struct net_device *dev)
923{
924 struct net_local *lp = netdev_priv(dev);
925
926 if (lp->use_dma) {
927 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
928 if (net_debug > 3)
929 printk("set_dma_cfg(): no DMA\n");
930 return;
931 }
932 if (lp->isa_config & ISA_RxDMA) {
933 lp->curr_rx_cfg |= RX_DMA_ONLY;
934 if (net_debug > 3)
935 printk("set_dma_cfg(): RX_DMA_ONLY\n");
936 } else {
937 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
938 if (net_debug > 3)
939 printk("set_dma_cfg(): AUTO_RX_DMA\n");
940 }
941 }
942}
943
944static int
945dma_bufcfg(struct net_device *dev)
946{
947 struct net_local *lp = netdev_priv(dev);
948 if (lp->use_dma)
949 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
950 else
951 return 0;
952}
953
954static int
955dma_busctl(struct net_device *dev)
956{
957 int retval = 0;
958 struct net_local *lp = netdev_priv(dev);
959 if (lp->use_dma) {
960 if (lp->isa_config & ANY_ISA_DMA)
961 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
962 if (lp->isa_config & DMA_BURST)
963 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
964 if (lp->dmasize == 64)
965 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
966 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
967 }
968 return retval;
969}
970
971static void
972dma_rx(struct net_device *dev)
973{
974 struct net_local *lp = netdev_priv(dev);
975 struct sk_buff *skb;
976 int status, length;
977 unsigned char *bp = lp->rx_dma_ptr;
978
979 status = bp[0] + (bp[1]<<8);
980 length = bp[2] + (bp[3]<<8);
981 bp += 4;
982 if (net_debug > 5) {
983 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
984 dev->name, (unsigned long)bp, status, length);
985 }
986 if ((status & RX_OK) == 0) {
987 count_rx_errors(status, lp);
988 goto skip_this_frame;
989 }
990
991 /* Malloc up new buffer. */
992 skb = dev_alloc_skb(length + 2);
993 if (skb == NULL) {
994 if (net_debug) /* I don't think we want to do this to a stressed system */
995 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
996 lp->stats.rx_dropped++;
997
998 /* AKPM: advance bp to the next frame */
999skip_this_frame:
1000 bp += (length + 3) & ~3;
1001 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1002 lp->rx_dma_ptr = bp;
1003 return;
1004 }
1005 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4
LT		 1006
1007 if (bp + length > lp->end_dma_buff) {
1008 int semi_cnt = lp->end_dma_buff - bp;
1009 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1010 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1011 length - semi_cnt);
1012 } else {
1013 memcpy(skb_put(skb,length), bp, length);
1014 }
1015 bp += (length + 3) & ~3;
1016 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1017 lp->rx_dma_ptr = bp;
1018
1019 if (net_debug > 3) {
1020 printk( "%s: received %d byte DMA packet of type %x\n",
1021 dev->name, length,
1022 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1023 }
1024 skb->protocol=eth_type_trans(skb,dev);
1025 netif_rx(skb);
1da177e4
LT		 1026 lp->stats.rx_packets++;
1027 lp->stats.rx_bytes += length;
1028}
1029
1030#endif /* ALLOW_DMA */
1031
dac499f9 1032static void __init reset_chip(struct net_device *dev)
1da177e4 1033{
0ac4ed9d 1034#if !defined(CONFIG_MACH_MX31ADS)
9c878967 1035#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1036 struct net_local *lp = netdev_priv(dev);
1037 int ioaddr = dev->base_addr;
1038#endif
1039 int reset_start_time;
1040
1041 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1042
1043 /* wait 30 ms */
1044 msleep(30);
1045
9c878967 1046#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1047 if (lp->chip_type != CS8900) {
1048 /* Hardware problem requires PNP registers to be reconfigured after a reset */
fc8c7d79 1049 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1da177e4
LT		 1050 outb(dev->irq, ioaddr + DATA_PORT);
1051 outb(0, ioaddr + DATA_PORT + 1);
1052
fc8c7d79 1053 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1da177e4
LT		 1054 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1055 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1056 }
1057#endif /* IXDP2x01 */
1058
1059 /* Wait until the chip is reset */
1060 reset_start_time = jiffies;
1061 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1062 ;
0ac4ed9d 1063#endif /* !CONFIG_MACH_MX31ADS */
1da177e4
LT		 1064}
1065
6aa20a22 1066
1da177e4
LT		 1067static void
1068control_dc_dc(struct net_device *dev, int on_not_off)
1069{
1070 struct net_local *lp = netdev_priv(dev);
1071 unsigned int selfcontrol;
1072 int timenow = jiffies;
6aa20a22 1073 /* control the DC to DC convertor in the SelfControl register.
1da177e4
LT		 1074 Note: This is hooked up to a general purpose pin, might not
1075 always be a DC to DC convertor. */
1076
1077 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1078 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1079 selfcontrol |= HCB1;
1080 else
1081 selfcontrol &= ~HCB1;
1082 writereg(dev, PP_SelfCTL, selfcontrol);
1083
1084 /* Wait for the DC/DC converter to power up - 500ms */
1085 while (jiffies - timenow < HZ)
1086 ;
1087}
1088
1089#define DETECTED_NONE 0
1090#define DETECTED_RJ45H 1
1091#define DETECTED_RJ45F 2
1092#define DETECTED_AUI 3
1093#define DETECTED_BNC 4
1094
1095static int
1096detect_tp(struct net_device *dev)
1097{
1098 struct net_local *lp = netdev_priv(dev);
1099 int timenow = jiffies;
1100 int fdx;
1101
1102 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1103
1104 /* If connected to another full duplex capable 10-Base-T card the link pulses
1105 seem to be lost when the auto detect bit in the LineCTL is set.
1106 To overcome this the auto detect bit will be cleared whilst testing the
1107 10-Base-T interface. This would not be necessary for the sparrow chip but
1108 is simpler to do it anyway. */
1109 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1110 control_dc_dc(dev, 0);
1111
1112 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1113 for (timenow = jiffies; jiffies - timenow < 15; )
1114 ;
1115 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1116 return DETECTED_NONE;
1117
1118 if (lp->chip_type == CS8900) {
1119 switch (lp->force & 0xf0) {
1120#if 0
1121 case FORCE_AUTO:
1122 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1123 return DETECTED_NONE;
1124#endif
1125 /* CS8900 doesn't support AUTO, change to HALF*/
1126 case FORCE_AUTO:
1127 lp->force &= ~FORCE_AUTO;
1128 lp->force |= FORCE_HALF;
1129 break;
1130 case FORCE_HALF:
1131 break;
1132 case FORCE_FULL:
1133 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1134 break;
1135 }
1136 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1137 } else {
1138 switch (lp->force & 0xf0) {
1139 case FORCE_AUTO:
1140 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1141 break;
1142 case FORCE_HALF:
1143 lp->auto_neg_cnf = 0;
1144 break;
1145 case FORCE_FULL:
1146 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1147 break;
1148 }
1149
1150 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1151
1152 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1153 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1154 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1155 if (jiffies - timenow > 4000) {
1156 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1157 break;
1158 }
1159 }
1160 }
1161 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1162 }
1163 if (fdx)
1164 return DETECTED_RJ45F;
1165 else
1166 return DETECTED_RJ45H;
1167}
1168
1169/* send a test packet - return true if carrier bits are ok */
1170static int
1171send_test_pkt(struct net_device *dev)
1172{
1173 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1174 0, 46, /* A 46 in network order */
1175 0, 0, /* DSAP=0 & SSAP=0 fields */
1176 0xf3, 0 /* Control (Test Req + P bit set) */ };
1177 long timenow = jiffies;
1178
1179 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1180
1181 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1182 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1183
974dffc2
LB		 1184 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1185 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1da177e4
LT		 1186
1187 /* Test to see if the chip has allocated memory for the packet */
1188 while (jiffies - timenow < 5)
1189 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1190 break;
1191 if (jiffies - timenow >= 5)
1192 return 0; /* this shouldn't happen */
1193
1194 /* Write the contents of the packet */
084f746a 1195 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1da177e4
LT		 1196
1197 if (net_debug > 1) printk("Sending test packet ");
1198 /* wait a couple of jiffies for packet to be received */
1199 for (timenow = jiffies; jiffies - timenow < 3; )
1200 ;
1201 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1202 if (net_debug > 1) printk("succeeded\n");
1203 return 1;
1204 }
1205 if (net_debug > 1) printk("failed\n");
1206 return 0;
1207}
1208
1209
1210static int
1211detect_aui(struct net_device *dev)
1212{
1213 struct net_local *lp = netdev_priv(dev);
1214
1215 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1216 control_dc_dc(dev, 0);
1217
1218 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1219
1220 if (send_test_pkt(dev))
1221 return DETECTED_AUI;
1222 else
1223 return DETECTED_NONE;
1224}
1225
1226static int
1227detect_bnc(struct net_device *dev)
1228{
1229 struct net_local *lp = netdev_priv(dev);
1230
1231 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1232 control_dc_dc(dev, 1);
1233
1234 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1235
1236 if (send_test_pkt(dev))
1237 return DETECTED_BNC;
1238 else
1239 return DETECTED_NONE;
1240}
1241
6aa20a22 1242
1da177e4
LT		 1243static void
1244write_irq(struct net_device *dev, int chip_type, int irq)
1245{
1246 int i;
1247
1248 if (chip_type == CS8900) {
1249 /* Search the mapping table for the corresponding IRQ pin. */
ff8ac609 1250 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1da177e4
LT		 1251 if (cs8900_irq_map[i] == irq)
1252 break;
1253 /* Not found */
ff8ac609 1254 if (i == ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 1255 i = 3;
1256 writereg(dev, PP_CS8900_ISAINT, i);
1257 } else {
1258 writereg(dev, PP_CS8920_ISAINT, irq);
1259 }
1260}
1261
1262/* Open/initialize the board. This is called (in the current kernel)
1263 sometime after booting when the 'ifconfig' program is run.
1264
1265 This routine should set everything up anew at each open, even
1266 registers that "should" only need to be set once at boot, so that
1267 there is non-reboot way to recover if something goes wrong.
1268 */
1269
1270/* AKPM: do we need to do any locking here? */
1271
1272static int
1273net_open(struct net_device *dev)
1274{
1275 struct net_local *lp = netdev_priv(dev);
1276 int result = 0;
1277 int i;
1278 int ret;
1279
277cb103 1280#if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1da177e4
LT		 1281 if (dev->irq < 2) {
1282 /* Allow interrupts to be generated by the chip */
1283/* Cirrus' release had this: */
1284#if 0
1285 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1286#endif
1287/* And 2.3.47 had this: */
1288 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1289
1290 for (i = 2; i < CS8920_NO_INTS; i++) {
1291 if ((1 << i) & lp->irq_map) {
1292 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1293 dev->irq = i;
1294 write_irq(dev, lp->chip_type, i);
1295 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1296 break;
1297 }
1298 }
1299 }
1300
1301 if (i >= CS8920_NO_INTS) {
1302 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1303 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1304 ret = -EAGAIN;
1305 goto bad_out;
1306 }
1307 }
1308 else
1309#endif
1310 {
0ac4ed9d 1311#ifndef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 1312 if (((1 << dev->irq) & lp->irq_map) == 0) {
1313 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1314 dev->name, dev->irq, lp->irq_map);
1315 ret = -EAGAIN;
1316 goto bad_out;
1317 }
1318#endif
1319/* FIXME: Cirrus' release had this: */
1320 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1321/* And 2.3.47 had this: */
1322#if 0
1323 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1324#endif
1325 write_irq(dev, lp->chip_type, dev->irq);
a0607fd3 1326 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
1da177e4 1327 if (ret) {
569b7892 1328 printk(KERN_ERR "cs89x0: request_irq(%d) failed\n", dev->irq);
1da177e4
LT		 1329 goto bad_out;
1330 }
1331 }
1332
1333#if ALLOW_DMA
1334 if (lp->use_dma) {
1335 if (lp->isa_config & ANY_ISA_DMA) {
1336 unsigned long flags;
1337 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1338 get_order(lp->dmasize * 1024));
1339
1340 if (!lp->dma_buff) {
1341 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1342 goto release_irq;
1343 }
1344 if (net_debug > 1) {
1345 printk( "%s: dma %lx %lx\n",
1346 dev->name,
1347 (unsigned long)lp->dma_buff,
1348 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1349 }
1350 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1351 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1352 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1353 goto release_irq;
1354 }
1355 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1356 if (request_dma(dev->dma, dev->name)) {
1357 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1358 goto release_irq;
1359 }
1360 write_dma(dev, lp->chip_type, dev->dma);
1361 lp->rx_dma_ptr = lp->dma_buff;
1362 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1363 spin_lock_irqsave(&lp->lock, flags);
1364 disable_dma(dev->dma);
1365 clear_dma_ff(dev->dma);
ef0657c4 1366 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
1da177e4
LT		 1367 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1368 set_dma_count(dev->dma, lp->dmasize*1024);
1369 enable_dma(dev->dma);
1370 spin_unlock_irqrestore(&lp->lock, flags);
1371 }
1372 }
1373#endif /* ALLOW_DMA */
1374
1375 /* set the Ethernet address */
1376 for (i=0; i < ETH_ALEN/2; i++)
1377 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1378
1379 /* while we're testing the interface, leave interrupts disabled */
1380 writereg(dev, PP_BusCTL, MEMORY_ON);
1381
1382 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1383 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1384 lp->linectl = LOW_RX_SQUELCH;
1385 else
1386 lp->linectl = 0;
1387
1388 /* check to make sure that they have the "right" hardware available */
1389 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1390 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1391 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1392 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1393 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1394 }
277cb103 1395#ifdef CONFIG_ARCH_PNX010X
0dd3c781 1396 result = A_CNF_10B_T;
1397#endif
1da177e4
LT		 1398 if (!result) {
1399 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
17a9440f
WC		 1400release_dma:
1401#if ALLOW_DMA
1402 free_dma(dev->dma);
17a9440f 1403release_irq:
1da177e4
LT		 1404 release_dma_buff(lp);
1405#endif
1406 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1407 free_irq(dev->irq, dev);
1408 ret = -EAGAIN;
1409 goto bad_out;
1410 }
1411
1412 /* set the hardware to the configured choice */
1413 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1414 case A_CNF_MEDIA_10B_T:
1415 result = detect_tp(dev);
1416 if (result==DETECTED_NONE) {
1417 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1418 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1419 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1420 }
1421 break;
1422 case A_CNF_MEDIA_AUI:
1423 result = detect_aui(dev);
1424 if (result==DETECTED_NONE) {
1425 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1426 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1427 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1428 }
1429 break;
1430 case A_CNF_MEDIA_10B_2:
1431 result = detect_bnc(dev);
1432 if (result==DETECTED_NONE) {
1433 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1434 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1435 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1436 }
1437 break;
1438 case A_CNF_MEDIA_AUTO:
1439 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1440 if (lp->adapter_cnf & A_CNF_10B_T)
1441 if ((result = detect_tp(dev)) != DETECTED_NONE)
1442 break;
1443 if (lp->adapter_cnf & A_CNF_AUI)
1444 if ((result = detect_aui(dev)) != DETECTED_NONE)
1445 break;
1446 if (lp->adapter_cnf & A_CNF_10B_2)
1447 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1448 break;
1449 printk(KERN_ERR "%s: no media detected\n", dev->name);
17a9440f 1450 goto release_dma;
1da177e4
LT		 1451 }
1452 switch(result) {
1453 case DETECTED_NONE:
1454 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
17a9440f 1455 goto release_dma;
1da177e4
LT		 1456 case DETECTED_RJ45H:
1457 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1458 break;
1459 case DETECTED_RJ45F:
1460 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1461 break;
1462 case DETECTED_AUI:
1463 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1464 break;
1465 case DETECTED_BNC:
1466 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1467 break;
1468 }
1469
1470 /* Turn on both receive and transmit operations */
1471 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1472
1473 /* Receive only error free packets addressed to this card */
1474 lp->rx_mode = 0;
1475 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1476
1477 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1478
1479 if (lp->isa_config & STREAM_TRANSFER)
1480 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1481#if ALLOW_DMA
1482 set_dma_cfg(dev);
1483#endif
1484 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1485
1486 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1487 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1488
1489 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1490#if ALLOW_DMA
1491 dma_bufcfg(dev) |
1492#endif
1493 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1494
1495 /* now that we've got our act together, enable everything */
1496 writereg(dev, PP_BusCTL, ENABLE_IRQ
1497 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1498#if ALLOW_DMA
1499 | dma_busctl(dev)
1500#endif
1501 );
1502 netif_start_queue(dev);
1503 if (net_debug > 1)
1504 printk("cs89x0: net_open() succeeded\n");
1505 return 0;
1506bad_out:
1507 return ret;
1508}
1509
1510static void net_timeout(struct net_device *dev)
1511{
1512 /* If we get here, some higher level has decided we are broken.
1513 There should really be a "kick me" function call instead. */
1514 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1515 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1516 /* Try to restart the adaptor. */
1517 netif_wake_queue(dev);
1518}
1519
61357325 1520static netdev_tx_t net_send_packet(struct sk_buff *skb,struct net_device *dev)
1da177e4
LT		 1521{
1522 struct net_local *lp = netdev_priv(dev);
79fbe134 1523 unsigned long flags;
1da177e4
LT		 1524
1525 if (net_debug > 3) {
1526 printk("%s: sent %d byte packet of type %x\n",
1527 dev->name, skb->len,
1528 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1529 }
1530
1531 /* keep the upload from being interrupted, since we
1532 ask the chip to start transmitting before the
1533 whole packet has been completely uploaded. */
1534
79fbe134 1535 spin_lock_irqsave(&lp->lock, flags);
1da177e4
LT		 1536 netif_stop_queue(dev);
1537
1538 /* initiate a transmit sequence */
974dffc2
LB		 1539 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1540 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1da177e4
LT		 1541
1542 /* Test to see if the chip has allocated memory for the packet */
1543 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1544 /*
1545 * Gasp! It hasn't. But that shouldn't happen since
1546 * we're waiting for TxOk, so return 1 and requeue this packet.
1547 */
6aa20a22 1548
79fbe134 1549 spin_unlock_irqrestore(&lp->lock, flags);
1da177e4 1550 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
5b548140 1551 return NETDEV_TX_BUSY;
1da177e4
LT		 1552 }
1553 /* Write the contents of the packet */
084f746a 1554 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
79fbe134 1555 spin_unlock_irqrestore(&lp->lock, flags);
e1699f50 1556 lp->stats.tx_bytes += skb->len;
1da177e4
LT		 1557 dev->trans_start = jiffies;
1558 dev_kfree_skb (skb);
1559
1560 /*
1561 * We DO NOT call netif_wake_queue() here.
1562 * We also DO NOT call netif_start_queue().
1563 *
1564 * Either of these would cause another bottom half run through
1565 * net_send_packet() before this packet has fully gone out. That causes
1566 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1567 * a dog. We just return and wait for the Tx completion interrupt handler
1568 * to restart the netdevice layer
1569 */
1570
6ed10654 1571 return NETDEV_TX_OK;
1da177e4 1572}
6aa20a22 1573
1da177e4
LT		 1574/* The typical workload of the driver:
1575 Handle the network interface interrupts. */
6aa20a22 1576
7d12e780 1577static irqreturn_t net_interrupt(int irq, void *dev_id)
1da177e4
LT		 1578{
1579 struct net_device *dev = dev_id;
1580 struct net_local *lp;
1581 int ioaddr, status;
1582 int handled = 0;
1583
1584 ioaddr = dev->base_addr;
1585 lp = netdev_priv(dev);
1586
1587 /* we MUST read all the events out of the ISQ, otherwise we'll never
1588 get interrupted again. As a consequence, we can't have any limit
1589 on the number of times we loop in the interrupt handler. The
1590 hardware guarantees that eventually we'll run out of events. Of
1591 course, if you're on a slow machine, and packets are arriving
1592 faster than you can read them off, you're screwed. Hasta la
1593 vista, baby! */
974dffc2 1594 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1da177e4
LT		 1595 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1596 handled = 1;
1597 switch(status & ISQ_EVENT_MASK) {
1598 case ISQ_RECEIVER_EVENT:
1599 /* Got a packet(s). */
1600 net_rx(dev);
1601 break;
1602 case ISQ_TRANSMITTER_EVENT:
1603 lp->stats.tx_packets++;
1604 netif_wake_queue(dev); /* Inform upper layers. */
1605 if ((status & ( TX_OK |
1606 TX_LOST_CRS |
1607 TX_SQE_ERROR |
1608 TX_LATE_COL |
1609 TX_16_COL)) != TX_OK) {
1610 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1611 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1612 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1613 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1614 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1615 }
1616 break;
1617 case ISQ_BUFFER_EVENT:
1618 if (status & READY_FOR_TX) {
1619 /* we tried to transmit a packet earlier,
1620 but inexplicably ran out of buffers.
1621 That shouldn't happen since we only ever
1622 load one packet. Shrug. Do the right
1623 thing anyway. */
1624 netif_wake_queue(dev); /* Inform upper layers. */
1625 }
1626 if (status & TX_UNDERRUN) {
1627 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1628 lp->send_underrun++;
1629 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1630 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1631 /* transmit cycle is done, although
1632 frame wasn't transmitted - this
1633 avoids having to wait for the upper
1634 layers to timeout on us, in the
1635 event of a tx underrun */
1636 netif_wake_queue(dev); /* Inform upper layers. */
1637 }
1638#if ALLOW_DMA
1639 if (lp->use_dma && (status & RX_DMA)) {
1640 int count = readreg(dev, PP_DmaFrameCnt);
1641 while(count) {
1642 if (net_debug > 5)
1643 printk("%s: receiving %d DMA frames\n", dev->name, count);
1644 if (net_debug > 2 && count >1)
1645 printk("%s: receiving %d DMA frames\n", dev->name, count);
1646 dma_rx(dev);
1647 if (--count == 0)
1648 count = readreg(dev, PP_DmaFrameCnt);
1649 if (net_debug > 2 && count > 0)
1650 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1651 }
1652 }
1653#endif
1654 break;
1655 case ISQ_RX_MISS_EVENT:
1656 lp->stats.rx_missed_errors += (status >>6);
1657 break;
1658 case ISQ_TX_COL_EVENT:
1659 lp->stats.collisions += (status >>6);
1660 break;
1661 }
1662 }
1663 return IRQ_RETVAL(handled);
1664}
1665
1666static void
1667count_rx_errors(int status, struct net_local *lp)
1668{
1669 lp->stats.rx_errors++;
1670 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1671 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1672 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1673 /* per str 172 */
1674 lp->stats.rx_crc_errors++;
1675 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1676 return;
1677}
1678
1679/* We have a good packet(s), get it/them out of the buffers. */
1680static void
1681net_rx(struct net_device *dev)
1682{
1683 struct net_local *lp = netdev_priv(dev);
1684 struct sk_buff *skb;
1685 int status, length;
1686
1687 int ioaddr = dev->base_addr;
fc8c7d79
LB		 1688 status = readword(ioaddr, RX_FRAME_PORT);
1689 length = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1690
1691 if ((status & RX_OK) == 0) {
1692 count_rx_errors(status, lp);
1693 return;
1694 }
1695
1696 /* Malloc up new buffer. */
1697 skb = dev_alloc_skb(length + 2);
1698 if (skb == NULL) {
1699#if 0 /* Again, this seems a cruel thing to do */
1700 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
1701#endif
1702 lp->stats.rx_dropped++;
1703 return;
1704 }
1705 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4 1706
084f746a 1707 readwords(ioaddr, RX_FRAME_PORT, skb_put(skb, length), length >> 1);
1da177e4 1708 if (length & 1)
fc8c7d79 1709 skb->data[length-1] = readword(ioaddr, RX_FRAME_PORT);
1da177e4
LT		 1710
1711 if (net_debug > 3) {
1712 printk( "%s: received %d byte packet of type %x\n",
1713 dev->name, length,
1714 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1715 }
1716
1717 skb->protocol=eth_type_trans(skb,dev);
1718 netif_rx(skb);
1da177e4
LT		 1719 lp->stats.rx_packets++;
1720 lp->stats.rx_bytes += length;
1721}
1722
1723#if ALLOW_DMA
1724static void release_dma_buff(struct net_local *lp)
1725{
1726 if (lp->dma_buff) {
1727 free_pages((unsigned long)(lp->dma_buff), get_order(lp->dmasize * 1024));
1728 lp->dma_buff = NULL;
1729 }
1730}
1731#endif
1732
1733/* The inverse routine to net_open(). */
1734static int
1735net_close(struct net_device *dev)
1736{
1737#if ALLOW_DMA
1738 struct net_local *lp = netdev_priv(dev);
1739#endif
1740
1741 netif_stop_queue(dev);
6aa20a22 1742
1da177e4
LT		 1743 writereg(dev, PP_RxCFG, 0);
1744 writereg(dev, PP_TxCFG, 0);
1745 writereg(dev, PP_BufCFG, 0);
1746 writereg(dev, PP_BusCTL, 0);
1747
1748 free_irq(dev->irq, dev);
1749
1750#if ALLOW_DMA
1751 if (lp->use_dma && lp->dma) {
1752 free_dma(dev->dma);
1753 release_dma_buff(lp);
1754 }
1755#endif
1756
1757 /* Update the statistics here. */
1758 return 0;
1759}
1760
1761/* Get the current statistics. This may be called with the card open or
1762 closed. */
1763static struct net_device_stats *
1764net_get_stats(struct net_device *dev)
1765{
1766 struct net_local *lp = netdev_priv(dev);
1767 unsigned long flags;
1768
1769 spin_lock_irqsave(&lp->lock, flags);
1770 /* Update the statistics from the device registers. */
1771 lp->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6);
1772 lp->stats.collisions += (readreg(dev, PP_TxCol) >> 6);
1773 spin_unlock_irqrestore(&lp->lock, flags);
1774
1775 return &lp->stats;
1776}
1777
1778static void set_multicast_list(struct net_device *dev)
1779{
1780 struct net_local *lp = netdev_priv(dev);
1781 unsigned long flags;
1782
1783 spin_lock_irqsave(&lp->lock, flags);
1784 if(dev->flags&IFF_PROMISC)
1785 {
1786 lp->rx_mode = RX_ALL_ACCEPT;
1787 }
1788 else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
1789 {
1790 /* The multicast-accept list is initialized to accept-all, and we
1791 rely on higher-level filtering for now. */
1792 lp->rx_mode = RX_MULTCAST_ACCEPT;
6aa20a22 1793 }
1da177e4
LT		 1794 else
1795 lp->rx_mode = 0;
1796
1797 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode);
1798
1799 /* in promiscuous mode, we accept errored packets, so we have to enable interrupts on them also */
1800 writereg(dev, PP_RxCFG, lp->curr_rx_cfg |
1801 (lp->rx_mode == RX_ALL_ACCEPT? (RX_CRC_ERROR_ENBL|RX_RUNT_ENBL|RX_EXTRA_DATA_ENBL) : 0));
1802 spin_unlock_irqrestore(&lp->lock, flags);
1803}
1804
1805
1806static int set_mac_address(struct net_device *dev, void *p)
1807{
1808 int i;
1809 struct sockaddr *addr = p;
1810
1da177e4
LT		 1811 if (netif_running(dev))
1812 return -EBUSY;
1813
1814 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
1815
e174961c
JB		 1816 if (net_debug)
1817 printk("%s: Setting MAC address to %pM.\n",
1818 dev->name, dev->dev_addr);
1819
1da177e4
LT		 1820 /* set the Ethernet address */
1821 for (i=0; i < ETH_ALEN/2; i++)
1822 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1823
1824 return 0;
1825}
1826
1827#ifdef MODULE
1828
1829static struct net_device *dev_cs89x0;
1830
1831/*
6aa20a22
JG		 1832 * Support the 'debug' module parm even if we're compiled for non-debug to
1833 * avoid breaking someone's startup scripts
1da177e4
LT		 1834 */
1835
1836static int io;
1837static int irq;
1838static int debug;
1839static char media[8];
1840static int duplex=-1;
1841
1842static int use_dma; /* These generate unused var warnings if ALLOW_DMA = 0 */
1843static int dma;
1844static int dmasize=16; /* or 64 */
1845
1846module_param(io, int, 0);
1847module_param(irq, int, 0);
1848module_param(debug, int, 0);
1849module_param_string(media, media, sizeof(media), 0);
1850module_param(duplex, int, 0);
1851module_param(dma , int, 0);
1852module_param(dmasize , int, 0);
1853module_param(use_dma , int, 0);
1854MODULE_PARM_DESC(io, "cs89x0 I/O base address");
1855MODULE_PARM_DESC(irq, "cs89x0 IRQ number");
1856#if DEBUGGING
1857MODULE_PARM_DESC(debug, "cs89x0 debug level (0-6)");
1858#else
1859MODULE_PARM_DESC(debug, "(ignored)");
1860#endif
1861MODULE_PARM_DESC(media, "Set cs89x0 adapter(s) media type(s) (rj45,bnc,aui)");
1862/* No other value than -1 for duplex seems to be currently interpreted */
1863MODULE_PARM_DESC(duplex, "(ignored)");
1864#if ALLOW_DMA
1865MODULE_PARM_DESC(dma , "cs89x0 ISA DMA channel; ignored if use_dma=0");
1866MODULE_PARM_DESC(dmasize , "cs89x0 DMA size in kB (16,64); ignored if use_dma=0");
1867MODULE_PARM_DESC(use_dma , "cs89x0 using DMA (0-1)");
1868#else
1869MODULE_PARM_DESC(dma , "(ignored)");
1870MODULE_PARM_DESC(dmasize , "(ignored)");
1871MODULE_PARM_DESC(use_dma , "(ignored)");
1872#endif
1873
e1f8e874 1874MODULE_AUTHOR("Mike Cruse, Russwll Nelson <nelson@crynwr.com>, Andrew Morton");
1da177e4
LT		 1875MODULE_LICENSE("GPL");
1876
1877
1878/*
1879* media=t - specify media type
1880 or media=2
1881 or media=aui
1882 or medai=auto
1883* duplex=0 - specify forced half/full/autonegotiate duplex
1884* debug=# - debug level
1885
1886
1887* Default Chip Configuration:
1888 * DMA Burst = enabled
1889 * IOCHRDY Enabled = enabled
1890 * UseSA = enabled
1891 * CS8900 defaults to half-duplex if not specified on command-line
1892 * CS8920 defaults to autoneg if not specified on command-line
1893 * Use reset defaults for other config parameters
1894
1895* Assumptions:
1896 * media type specified is supported (circuitry is present)
1897 * if memory address is > 1MB, then required mem decode hw is present
1898 * if 10B-2, then agent other than driver will enable DC/DC converter
1899 (hw or software util)
1900
1901
1902*/
1903
e26c129a 1904int __init init_module(void)
1da177e4
LT		 1905{
1906 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
1907 struct net_local *lp;
1908 int ret = 0;
1909
1910#if DEBUGGING
1911 net_debug = debug;
1912#else
1913 debug = 0;
1914#endif
1915 if (!dev)
1916 return -ENOMEM;
1917
1918 dev->irq = irq;
1919 dev->base_addr = io;
1920 lp = netdev_priv(dev);
1921
1922#if ALLOW_DMA
1923 if (use_dma) {
1924 lp->use_dma = use_dma;
1925 lp->dma = dma;
1926 lp->dmasize = dmasize;
1927 }
1928#endif
1929
1930 spin_lock_init(&lp->lock);
1931
1932 /* boy, they'd better get these right */
1933 if (!strcmp(media, "rj45"))
1934 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1935 else if (!strcmp(media, "aui"))
1936 lp->adapter_cnf = A_CNF_MEDIA_AUI | A_CNF_AUI;
1937 else if (!strcmp(media, "bnc"))
1938 lp->adapter_cnf = A_CNF_MEDIA_10B_2 | A_CNF_10B_2;
1939 else
1940 lp->adapter_cnf = A_CNF_MEDIA_10B_T | A_CNF_10B_T;
1941
1942 if (duplex==-1)
1943 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1944
1945 if (io == 0) {
1946 printk(KERN_ERR "cs89x0.c: Module autoprobing not allowed.\n");
1947 printk(KERN_ERR "cs89x0.c: Append io=0xNNN\n");
1948 ret = -EPERM;
1949 goto out;
1950 } else if (io <= 0x1ff) {
1951 ret = -ENXIO;
1952 goto out;
1953 }
1954
1955#if ALLOW_DMA
1956 if (use_dma && dmasize != 16 && dmasize != 64) {
1957 printk(KERN_ERR "cs89x0.c: dma size must be either 16K or 64K, not %dK\n", dmasize);
1958 ret = -EPERM;
1959 goto out;
1960 }
1961#endif
1962 ret = cs89x0_probe1(dev, io, 1);
1963 if (ret)
1964 goto out;
1965
1da177e4
LT		 1966 dev_cs89x0 = dev;
1967 return 0;
1968out:
1969 free_netdev(dev);
1970 return ret;
1971}
1972
afc8eb46 1973void __exit
1da177e4
LT		 1974cleanup_module(void)
1975{
1976 unregister_netdev(dev_cs89x0);
fc8c7d79 1977 writeword(dev_cs89x0->base_addr, ADD_PORT, PP_ChipID);
1da177e4
LT		 1978 release_region(dev_cs89x0->base_addr, NETCARD_IO_EXTENT);
1979 free_netdev(dev_cs89x0);
1980}
1981#endif /* MODULE */
6aa20a22 1982
1da177e4
LT		 1983/*
1984 * Local variables:
1985 * version-control: t
1986 * kept-new-versions: 5
1987 * c-indent-level: 8
1988 * tab-width: 8
1989 * End:
1990 *
1991 */
Linux kernel - Deliverables
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