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drivers/net: Remove unnecessary returns from void function()s
[net-next-2.6.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>
1da177e4
LT		 141#include <linux/spinlock.h>
142#include <linux/string.h>
143#include <linux/init.h>
144#include <linux/bitops.h>
145#include <linux/delay.h>
5a0e3ad6 146#include <linux/gfp.h>
1da177e4
LT		 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
c41b20e7 583 /* truly 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
HX		 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 }
1da177e4
LT		 905}
906
907static void
908write_dma(struct net_device *dev, int chip_type, int dma)
909{
910 struct net_local *lp = netdev_priv(dev);
911 if ((lp->isa_config & ANY_ISA_DMA) == 0)
912 return;
913 if (chip_type == CS8900) {
914 writereg(dev, PP_CS8900_ISADMA, dma-5);
915 } else {
916 writereg(dev, PP_CS8920_ISADMA, dma);
917 }
918}
919
920static void
921set_dma_cfg(struct net_device *dev)
922{
923 struct net_local *lp = netdev_priv(dev);
924
925 if (lp->use_dma) {
926 if ((lp->isa_config & ANY_ISA_DMA) == 0) {
927 if (net_debug > 3)
928 printk("set_dma_cfg(): no DMA\n");
929 return;
930 }
931 if (lp->isa_config & ISA_RxDMA) {
932 lp->curr_rx_cfg |= RX_DMA_ONLY;
933 if (net_debug > 3)
934 printk("set_dma_cfg(): RX_DMA_ONLY\n");
935 } else {
936 lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */
937 if (net_debug > 3)
938 printk("set_dma_cfg(): AUTO_RX_DMA\n");
939 }
940 }
941}
942
943static int
944dma_bufcfg(struct net_device *dev)
945{
946 struct net_local *lp = netdev_priv(dev);
947 if (lp->use_dma)
948 return (lp->isa_config & ANY_ISA_DMA)? RX_DMA_ENBL : 0;
949 else
950 return 0;
951}
952
953static int
954dma_busctl(struct net_device *dev)
955{
956 int retval = 0;
957 struct net_local *lp = netdev_priv(dev);
958 if (lp->use_dma) {
959 if (lp->isa_config & ANY_ISA_DMA)
960 retval |= RESET_RX_DMA; /* Reset the DMA pointer */
961 if (lp->isa_config & DMA_BURST)
962 retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */
963 if (lp->dmasize == 64)
964 retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */
965 retval |= MEMORY_ON; /* we need memory enabled to use DMA. */
966 }
967 return retval;
968}
969
970static void
971dma_rx(struct net_device *dev)
972{
973 struct net_local *lp = netdev_priv(dev);
974 struct sk_buff *skb;
975 int status, length;
976 unsigned char *bp = lp->rx_dma_ptr;
977
978 status = bp[0] + (bp[1]<<8);
979 length = bp[2] + (bp[3]<<8);
980 bp += 4;
981 if (net_debug > 5) {
982 printk( "%s: receiving DMA packet at %lx, status %x, length %x\n",
983 dev->name, (unsigned long)bp, status, length);
984 }
985 if ((status & RX_OK) == 0) {
986 count_rx_errors(status, lp);
987 goto skip_this_frame;
988 }
989
990 /* Malloc up new buffer. */
991 skb = dev_alloc_skb(length + 2);
992 if (skb == NULL) {
993 if (net_debug) /* I don't think we want to do this to a stressed system */
994 printk("%s: Memory squeeze, dropping packet.\n", dev->name);
995 lp->stats.rx_dropped++;
996
997 /* AKPM: advance bp to the next frame */
998skip_this_frame:
999 bp += (length + 3) & ~3;
1000 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1001 lp->rx_dma_ptr = bp;
1002 return;
1003 }
1004 skb_reserve(skb, 2); /* longword align L3 header */
1da177e4
LT		 1005
1006 if (bp + length > lp->end_dma_buff) {
1007 int semi_cnt = lp->end_dma_buff - bp;
1008 memcpy(skb_put(skb,semi_cnt), bp, semi_cnt);
1009 memcpy(skb_put(skb,length - semi_cnt), lp->dma_buff,
1010 length - semi_cnt);
1011 } else {
1012 memcpy(skb_put(skb,length), bp, length);
1013 }
1014 bp += (length + 3) & ~3;
1015 if (bp >= lp->end_dma_buff) bp -= lp->dmasize*1024;
1016 lp->rx_dma_ptr = bp;
1017
1018 if (net_debug > 3) {
1019 printk( "%s: received %d byte DMA packet of type %x\n",
1020 dev->name, length,
1021 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1022 }
1023 skb->protocol=eth_type_trans(skb,dev);
1024 netif_rx(skb);
1da177e4
LT		 1025 lp->stats.rx_packets++;
1026 lp->stats.rx_bytes += length;
1027}
1028
1029#endif /* ALLOW_DMA */
1030
dac499f9 1031static void __init reset_chip(struct net_device *dev)
1da177e4 1032{
0ac4ed9d 1033#if !defined(CONFIG_MACH_MX31ADS)
9c878967 1034#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1035 struct net_local *lp = netdev_priv(dev);
1036 int ioaddr = dev->base_addr;
1037#endif
1038 int reset_start_time;
1039
1040 writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET);
1041
1042 /* wait 30 ms */
1043 msleep(30);
1044
9c878967 1045#if !defined(CONFIG_MACH_IXDP2351) && !defined(CONFIG_ARCH_IXDP2X01)
1da177e4
LT		 1046 if (lp->chip_type != CS8900) {
1047 /* Hardware problem requires PNP registers to be reconfigured after a reset */
fc8c7d79 1048 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAINT);
1da177e4
LT		 1049 outb(dev->irq, ioaddr + DATA_PORT);
1050 outb(0, ioaddr + DATA_PORT + 1);
1051
fc8c7d79 1052 writeword(ioaddr, ADD_PORT, PP_CS8920_ISAMemB);
1da177e4
LT		 1053 outb((dev->mem_start >> 16) & 0xff, ioaddr + DATA_PORT);
1054 outb((dev->mem_start >> 8) & 0xff, ioaddr + DATA_PORT + 1);
1055 }
1056#endif /* IXDP2x01 */
1057
1058 /* Wait until the chip is reset */
1059 reset_start_time = jiffies;
1060 while( (readreg(dev, PP_SelfST) & INIT_DONE) == 0 && jiffies - reset_start_time < 2)
1061 ;
0ac4ed9d 1062#endif /* !CONFIG_MACH_MX31ADS */
1da177e4
LT		 1063}
1064
6aa20a22 1065
1da177e4
LT		 1066static void
1067control_dc_dc(struct net_device *dev, int on_not_off)
1068{
1069 struct net_local *lp = netdev_priv(dev);
1070 unsigned int selfcontrol;
1071 int timenow = jiffies;
6aa20a22 1072 /* control the DC to DC convertor in the SelfControl register.
1da177e4
LT		 1073 Note: This is hooked up to a general purpose pin, might not
1074 always be a DC to DC convertor. */
1075
1076 selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */
1077 if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off)
1078 selfcontrol |= HCB1;
1079 else
1080 selfcontrol &= ~HCB1;
1081 writereg(dev, PP_SelfCTL, selfcontrol);
1082
1083 /* Wait for the DC/DC converter to power up - 500ms */
1084 while (jiffies - timenow < HZ)
1085 ;
1086}
1087
1088#define DETECTED_NONE 0
1089#define DETECTED_RJ45H 1
1090#define DETECTED_RJ45F 2
1091#define DETECTED_AUI 3
1092#define DETECTED_BNC 4
1093
1094static int
1095detect_tp(struct net_device *dev)
1096{
1097 struct net_local *lp = netdev_priv(dev);
1098 int timenow = jiffies;
1099 int fdx;
1100
1101 if (net_debug > 1) printk("%s: Attempting TP\n", dev->name);
1102
1103 /* If connected to another full duplex capable 10-Base-T card the link pulses
1104 seem to be lost when the auto detect bit in the LineCTL is set.
1105 To overcome this the auto detect bit will be cleared whilst testing the
1106 10-Base-T interface. This would not be necessary for the sparrow chip but
1107 is simpler to do it anyway. */
1108 writereg(dev, PP_LineCTL, lp->linectl &~ AUI_ONLY);
1109 control_dc_dc(dev, 0);
1110
1111 /* Delay for the hardware to work out if the TP cable is present - 150ms */
1112 for (timenow = jiffies; jiffies - timenow < 15; )
1113 ;
1114 if ((readreg(dev, PP_LineST) & LINK_OK) == 0)
1115 return DETECTED_NONE;
1116
1117 if (lp->chip_type == CS8900) {
1118 switch (lp->force & 0xf0) {
1119#if 0
1120 case FORCE_AUTO:
1121 printk("%s: cs8900 doesn't autonegotiate\n",dev->name);
1122 return DETECTED_NONE;
1123#endif
1124 /* CS8900 doesn't support AUTO, change to HALF*/
1125 case FORCE_AUTO:
1126 lp->force &= ~FORCE_AUTO;
1127 lp->force |= FORCE_HALF;
1128 break;
1129 case FORCE_HALF:
1130 break;
1131 case FORCE_FULL:
1132 writereg(dev, PP_TestCTL, readreg(dev, PP_TestCTL) | FDX_8900);
1133 break;
1134 }
1135 fdx = readreg(dev, PP_TestCTL) & FDX_8900;
1136 } else {
1137 switch (lp->force & 0xf0) {
1138 case FORCE_AUTO:
1139 lp->auto_neg_cnf = AUTO_NEG_ENABLE;
1140 break;
1141 case FORCE_HALF:
1142 lp->auto_neg_cnf = 0;
1143 break;
1144 case FORCE_FULL:
1145 lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX;
1146 break;
1147 }
1148
1149 writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK);
1150
1151 if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) {
1152 printk(KERN_INFO "%s: negotiating duplex...\n",dev->name);
1153 while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) {
1154 if (jiffies - timenow > 4000) {
1155 printk(KERN_ERR "**** Full / half duplex auto-negotiation timed out ****\n");
1156 break;
1157 }
1158 }
1159 }
1160 fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE;
1161 }
1162 if (fdx)
1163 return DETECTED_RJ45F;
1164 else
1165 return DETECTED_RJ45H;
1166}
1167
1168/* send a test packet - return true if carrier bits are ok */
1169static int
1170send_test_pkt(struct net_device *dev)
1171{
1172 char test_packet[] = { 0,0,0,0,0,0, 0,0,0,0,0,0,
1173 0, 46, /* A 46 in network order */
1174 0, 0, /* DSAP=0 & SSAP=0 fields */
1175 0xf3, 0 /* Control (Test Req + P bit set) */ };
1176 long timenow = jiffies;
1177
1178 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON);
1179
1180 memcpy(test_packet, dev->dev_addr, ETH_ALEN);
1181 memcpy(test_packet+ETH_ALEN, dev->dev_addr, ETH_ALEN);
1182
974dffc2
LB		 1183 writeword(dev->base_addr, TX_CMD_PORT, TX_AFTER_ALL);
1184 writeword(dev->base_addr, TX_LEN_PORT, ETH_ZLEN);
1da177e4
LT		 1185
1186 /* Test to see if the chip has allocated memory for the packet */
1187 while (jiffies - timenow < 5)
1188 if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW)
1189 break;
1190 if (jiffies - timenow >= 5)
1191 return 0; /* this shouldn't happen */
1192
1193 /* Write the contents of the packet */
084f746a 1194 writewords(dev->base_addr, TX_FRAME_PORT,test_packet,(ETH_ZLEN+1) >>1);
1da177e4
LT		 1195
1196 if (net_debug > 1) printk("Sending test packet ");
1197 /* wait a couple of jiffies for packet to be received */
1198 for (timenow = jiffies; jiffies - timenow < 3; )
1199 ;
1200 if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) {
1201 if (net_debug > 1) printk("succeeded\n");
1202 return 1;
1203 }
1204 if (net_debug > 1) printk("failed\n");
1205 return 0;
1206}
1207
1208
1209static int
1210detect_aui(struct net_device *dev)
1211{
1212 struct net_local *lp = netdev_priv(dev);
1213
1214 if (net_debug > 1) printk("%s: Attempting AUI\n", dev->name);
1215 control_dc_dc(dev, 0);
1216
1217 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1218
1219 if (send_test_pkt(dev))
1220 return DETECTED_AUI;
1221 else
1222 return DETECTED_NONE;
1223}
1224
1225static int
1226detect_bnc(struct net_device *dev)
1227{
1228 struct net_local *lp = netdev_priv(dev);
1229
1230 if (net_debug > 1) printk("%s: Attempting BNC\n", dev->name);
1231 control_dc_dc(dev, 1);
1232
1233 writereg(dev, PP_LineCTL, (lp->linectl &~ AUTO_AUI_10BASET) | AUI_ONLY);
1234
1235 if (send_test_pkt(dev))
1236 return DETECTED_BNC;
1237 else
1238 return DETECTED_NONE;
1239}
1240
6aa20a22 1241
1da177e4
LT		 1242static void
1243write_irq(struct net_device *dev, int chip_type, int irq)
1244{
1245 int i;
1246
1247 if (chip_type == CS8900) {
1248 /* Search the mapping table for the corresponding IRQ pin. */
ff8ac609 1249 for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++)
1da177e4
LT		 1250 if (cs8900_irq_map[i] == irq)
1251 break;
1252 /* Not found */
ff8ac609 1253 if (i == ARRAY_SIZE(cs8900_irq_map))
1da177e4
LT		 1254 i = 3;
1255 writereg(dev, PP_CS8900_ISAINT, i);
1256 } else {
1257 writereg(dev, PP_CS8920_ISAINT, irq);
1258 }
1259}
1260
1261/* Open/initialize the board. This is called (in the current kernel)
1262 sometime after booting when the 'ifconfig' program is run.
1263
1264 This routine should set everything up anew at each open, even
1265 registers that "should" only need to be set once at boot, so that
1266 there is non-reboot way to recover if something goes wrong.
1267 */
1268
1269/* AKPM: do we need to do any locking here? */
1270
1271static int
1272net_open(struct net_device *dev)
1273{
1274 struct net_local *lp = netdev_priv(dev);
1275 int result = 0;
1276 int i;
1277 int ret;
1278
277cb103 1279#if !defined(CONFIG_SH_HICOSH4) && !defined(CONFIG_ARCH_PNX010X) /* uses irq#1, so this won't work */
1da177e4
LT		 1280 if (dev->irq < 2) {
1281 /* Allow interrupts to be generated by the chip */
1282/* Cirrus' release had this: */
1283#if 0
1284 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1285#endif
1286/* And 2.3.47 had this: */
1287 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1288
1289 for (i = 2; i < CS8920_NO_INTS; i++) {
1290 if ((1 << i) & lp->irq_map) {
1291 if (request_irq(i, net_interrupt, 0, dev->name, dev) == 0) {
1292 dev->irq = i;
1293 write_irq(dev, lp->chip_type, i);
1294 /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */
1295 break;
1296 }
1297 }
1298 }
1299
1300 if (i >= CS8920_NO_INTS) {
1301 writereg(dev, PP_BusCTL, 0); /* disable interrupts. */
1302 printk(KERN_ERR "cs89x0: can't get an interrupt\n");
1303 ret = -EAGAIN;
1304 goto bad_out;
1305 }
1306 }
1307 else
1308#endif
1309 {
0ac4ed9d 1310#ifndef CONFIG_CS89x0_NONISA_IRQ
1da177e4
LT		 1311 if (((1 << dev->irq) & lp->irq_map) == 0) {
1312 printk(KERN_ERR "%s: IRQ %d is not in our map of allowable IRQs, which is %x\n",
1313 dev->name, dev->irq, lp->irq_map);
1314 ret = -EAGAIN;
1315 goto bad_out;
1316 }
1317#endif
1318/* FIXME: Cirrus' release had this: */
1319 writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ );
1320/* And 2.3.47 had this: */
1321#if 0
1322 writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON);
1323#endif
1324 write_irq(dev, lp->chip_type, dev->irq);
a0607fd3 1325 ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev);
1da177e4 1326 if (ret) {
569b7892 1327 printk(KERN_ERR "cs89x0: request_irq(%d) failed\n", dev->irq);
1da177e4
LT		 1328 goto bad_out;
1329 }
1330 }
1331
1332#if ALLOW_DMA
1333 if (lp->use_dma) {
1334 if (lp->isa_config & ANY_ISA_DMA) {
1335 unsigned long flags;
1336 lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL,
1337 get_order(lp->dmasize * 1024));
1338
1339 if (!lp->dma_buff) {
1340 printk(KERN_ERR "%s: cannot get %dK memory for DMA\n", dev->name, lp->dmasize);
1341 goto release_irq;
1342 }
1343 if (net_debug > 1) {
1344 printk( "%s: dma %lx %lx\n",
1345 dev->name,
1346 (unsigned long)lp->dma_buff,
1347 (unsigned long)isa_virt_to_bus(lp->dma_buff));
1348 }
1349 if ((unsigned long) lp->dma_buff >= MAX_DMA_ADDRESS ||
1350 !dma_page_eq(lp->dma_buff, lp->dma_buff+lp->dmasize*1024-1)) {
1351 printk(KERN_ERR "%s: not usable as DMA buffer\n", dev->name);
1352 goto release_irq;
1353 }
1354 memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */
1355 if (request_dma(dev->dma, dev->name)) {
1356 printk(KERN_ERR "%s: cannot get dma channel %d\n", dev->name, dev->dma);
1357 goto release_irq;
1358 }
1359 write_dma(dev, lp->chip_type, dev->dma);
1360 lp->rx_dma_ptr = lp->dma_buff;
1361 lp->end_dma_buff = lp->dma_buff + lp->dmasize*1024;
1362 spin_lock_irqsave(&lp->lock, flags);
1363 disable_dma(dev->dma);
1364 clear_dma_ff(dev->dma);
ef0657c4 1365 set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */
1da177e4
LT		 1366 set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff));
1367 set_dma_count(dev->dma, lp->dmasize*1024);
1368 enable_dma(dev->dma);
1369 spin_unlock_irqrestore(&lp->lock, flags);
1370 }
1371 }
1372#endif /* ALLOW_DMA */
1373
1374 /* set the Ethernet address */
1375 for (i=0; i < ETH_ALEN/2; i++)
1376 writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));
1377
1378 /* while we're testing the interface, leave interrupts disabled */
1379 writereg(dev, PP_BusCTL, MEMORY_ON);
1380
1381 /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */
1382 if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH))
1383 lp->linectl = LOW_RX_SQUELCH;
1384 else
1385 lp->linectl = 0;
1386
1387 /* check to make sure that they have the "right" hardware available */
1388 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1389 case A_CNF_MEDIA_10B_T: result = lp->adapter_cnf & A_CNF_10B_T; break;
1390 case A_CNF_MEDIA_AUI: result = lp->adapter_cnf & A_CNF_AUI; break;
1391 case A_CNF_MEDIA_10B_2: result = lp->adapter_cnf & A_CNF_10B_2; break;
1392 default: result = lp->adapter_cnf & (A_CNF_10B_T | A_CNF_AUI | A_CNF_10B_2);
1393 }
277cb103 1394#ifdef CONFIG_ARCH_PNX010X
0dd3c781 1395 result = A_CNF_10B_T;
1396#endif
1da177e4
LT		 1397 if (!result) {
1398 printk(KERN_ERR "%s: EEPROM is configured for unavailable media\n", dev->name);
17a9440f
WC		 1399release_dma:
1400#if ALLOW_DMA
1401 free_dma(dev->dma);
17a9440f 1402release_irq:
1da177e4
LT		 1403 release_dma_buff(lp);
1404#endif
1405 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON));
1406 free_irq(dev->irq, dev);
1407 ret = -EAGAIN;
1408 goto bad_out;
1409 }
1410
1411 /* set the hardware to the configured choice */
1412 switch(lp->adapter_cnf & A_CNF_MEDIA_TYPE) {
1413 case A_CNF_MEDIA_10B_T:
1414 result = detect_tp(dev);
1415 if (result==DETECTED_NONE) {
1416 printk(KERN_WARNING "%s: 10Base-T (RJ-45) has no cable\n", dev->name);
1417 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1418 result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */
1419 }
1420 break;
1421 case A_CNF_MEDIA_AUI:
1422 result = detect_aui(dev);
1423 if (result==DETECTED_NONE) {
1424 printk(KERN_WARNING "%s: 10Base-5 (AUI) has no cable\n", dev->name);
1425 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1426 result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */
1427 }
1428 break;
1429 case A_CNF_MEDIA_10B_2:
1430 result = detect_bnc(dev);
1431 if (result==DETECTED_NONE) {
1432 printk(KERN_WARNING "%s: 10Base-2 (BNC) has no cable\n", dev->name);
1433 if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */
1434 result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */
1435 }
1436 break;
1437 case A_CNF_MEDIA_AUTO:
1438 writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET);
1439 if (lp->adapter_cnf & A_CNF_10B_T)
1440 if ((result = detect_tp(dev)) != DETECTED_NONE)
1441 break;
1442 if (lp->adapter_cnf & A_CNF_AUI)
1443 if ((result = detect_aui(dev)) != DETECTED_NONE)
1444 break;
1445 if (lp->adapter_cnf & A_CNF_10B_2)
1446 if ((result = detect_bnc(dev)) != DETECTED_NONE)
1447 break;
1448 printk(KERN_ERR "%s: no media detected\n", dev->name);
17a9440f 1449 goto release_dma;
1da177e4
LT		 1450 }
1451 switch(result) {
1452 case DETECTED_NONE:
1453 printk(KERN_ERR "%s: no network cable attached to configured media\n", dev->name);
17a9440f 1454 goto release_dma;
1da177e4
LT		 1455 case DETECTED_RJ45H:
1456 printk(KERN_INFO "%s: using half-duplex 10Base-T (RJ-45)\n", dev->name);
1457 break;
1458 case DETECTED_RJ45F:
1459 printk(KERN_INFO "%s: using full-duplex 10Base-T (RJ-45)\n", dev->name);
1460 break;
1461 case DETECTED_AUI:
1462 printk(KERN_INFO "%s: using 10Base-5 (AUI)\n", dev->name);
1463 break;
1464 case DETECTED_BNC:
1465 printk(KERN_INFO "%s: using 10Base-2 (BNC)\n", dev->name);
1466 break;
1467 }
1468
1469 /* Turn on both receive and transmit operations */
1470 writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON);
1471
1472 /* Receive only error free packets addressed to this card */
1473 lp->rx_mode = 0;
1474 writereg(dev, PP_RxCTL, DEF_RX_ACCEPT);
1475
1476 lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL;
1477
1478 if (lp->isa_config & STREAM_TRANSFER)
1479 lp->curr_rx_cfg |= RX_STREAM_ENBL;
1480#if ALLOW_DMA
1481 set_dma_cfg(dev);
1482#endif
1483 writereg(dev, PP_RxCFG, lp->curr_rx_cfg);
1484
1485 writereg(dev, PP_TxCFG, TX_LOST_CRS_ENBL | TX_SQE_ERROR_ENBL | TX_OK_ENBL |
1486 TX_LATE_COL_ENBL | TX_JBR_ENBL | TX_ANY_COL_ENBL | TX_16_COL_ENBL);
1487
1488 writereg(dev, PP_BufCFG, READY_FOR_TX_ENBL | RX_MISS_COUNT_OVRFLOW_ENBL |
1489#if ALLOW_DMA
1490 dma_bufcfg(dev) |
1491#endif
1492 TX_COL_COUNT_OVRFLOW_ENBL | TX_UNDERRUN_ENBL);
1493
1494 /* now that we've got our act together, enable everything */
1495 writereg(dev, PP_BusCTL, ENABLE_IRQ
1496 | (dev->mem_start?MEMORY_ON : 0) /* turn memory on */
1497#if ALLOW_DMA
1498 | dma_busctl(dev)
1499#endif
1500 );
1501 netif_start_queue(dev);
1502 if (net_debug > 1)
1503 printk("cs89x0: net_open() succeeded\n");
1504 return 0;
1505bad_out:
1506 return ret;
1507}
1508
1509static void net_timeout(struct net_device *dev)
1510{
1511 /* If we get here, some higher level has decided we are broken.
1512 There should really be a "kick me" function call instead. */
1513 if (net_debug > 0) printk("%s: transmit timed out, %s?\n", dev->name,
1514 tx_done(dev) ? "IRQ conflict ?" : "network cable problem");
1515 /* Try to restart the adaptor. */
1516 netif_wake_queue(dev);
1517}
1518
61357325 1519static netdev_tx_t net_send_packet(struct sk_buff *skb,struct net_device *dev)
1da177e4
LT		 1520{
1521 struct net_local *lp = netdev_priv(dev);
79fbe134 1522 unsigned long flags;
1da177e4
LT		 1523
1524 if (net_debug > 3) {
1525 printk("%s: sent %d byte packet of type %x\n",
1526 dev->name, skb->len,
1527 (skb->data[ETH_ALEN+ETH_ALEN] << 8) | skb->data[ETH_ALEN+ETH_ALEN+1]);
1528 }
1529
1530 /* keep the upload from being interrupted, since we
1531 ask the chip to start transmitting before the
1532 whole packet has been completely uploaded. */
1533
79fbe134 1534 spin_lock_irqsave(&lp->lock, flags);
1da177e4
LT		 1535 netif_stop_queue(dev);
1536
1537 /* initiate a transmit sequence */
974dffc2
LB		 1538 writeword(dev->base_addr, TX_CMD_PORT, lp->send_cmd);
1539 writeword(dev->base_addr, TX_LEN_PORT, skb->len);
1da177e4
LT		 1540
1541 /* Test to see if the chip has allocated memory for the packet */
1542 if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) {
1543 /*
1544 * Gasp! It hasn't. But that shouldn't happen since
1545 * we're waiting for TxOk, so return 1 and requeue this packet.
1546 */
6aa20a22 1547
79fbe134 1548 spin_unlock_irqrestore(&lp->lock, flags);
1da177e4 1549 if (net_debug) printk("cs89x0: Tx buffer not free!\n");
5b548140 1550 return NETDEV_TX_BUSY;
1da177e4
LT		 1551 }
1552 /* Write the contents of the packet */
084f746a 1553 writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1);
79fbe134 1554 spin_unlock_irqrestore(&lp->lock, flags);
e1699f50 1555 lp->stats.tx_bytes += skb->len;
1da177e4
LT		 1556 dev_kfree_skb (skb);
1557
1558 /*
1559 * We DO NOT call netif_wake_queue() here.
1560 * We also DO NOT call netif_start_queue().
1561 *
1562 * Either of these would cause another bottom half run through
1563 * net_send_packet() before this packet has fully gone out. That causes
1564 * us to hit the "Gasp!" above and the send is rescheduled. it runs like
1565 * a dog. We just return and wait for the Tx completion interrupt handler
1566 * to restart the netdevice layer
1567 */
1568
6ed10654 1569 return NETDEV_TX_OK;
1da177e4 1570}
6aa20a22 1571
1da177e4
LT		 1572/* The typical workload of the driver:
1573 Handle the network interface interrupts. */
6aa20a22 1574
7d12e780 1575static irqreturn_t net_interrupt(int irq, void *dev_id)
1da177e4
LT		 1576{
1577 struct net_device *dev = dev_id;
1578 struct net_local *lp;
1579 int ioaddr, status;
1580 int handled = 0;
1581
1582 ioaddr = dev->base_addr;
1583 lp = netdev_priv(dev);
1584
1585 /* we MUST read all the events out of the ISQ, otherwise we'll never
1586 get interrupted again. As a consequence, we can't have any limit
1587 on the number of times we loop in the interrupt handler. The
1588 hardware guarantees that eventually we'll run out of events. Of
1589 course, if you're on a slow machine, and packets are arriving
1590 faster than you can read them off, you're screwed. Hasta la
1591 vista, baby! */
974dffc2 1592 while ((status = readword(dev->base_addr, ISQ_PORT))) {
1da177e4
LT		 1593 if (net_debug > 4)printk("%s: event=%04x\n", dev->name, status);
1594 handled = 1;
1595 switch(status & ISQ_EVENT_MASK) {
1596 case ISQ_RECEIVER_EVENT:
1597 /* Got a packet(s). */
1598 net_rx(dev);
1599 break;
1600 case ISQ_TRANSMITTER_EVENT:
1601 lp->stats.tx_packets++;
1602 netif_wake_queue(dev); /* Inform upper layers. */
1603 if ((status & ( TX_OK |
1604 TX_LOST_CRS |
1605 TX_SQE_ERROR |
1606 TX_LATE_COL |
1607 TX_16_COL)) != TX_OK) {
1608 if ((status & TX_OK) == 0) lp->stats.tx_errors++;
1609 if (status & TX_LOST_CRS) lp->stats.tx_carrier_errors++;
1610 if (status & TX_SQE_ERROR) lp->stats.tx_heartbeat_errors++;
1611 if (status & TX_LATE_COL) lp->stats.tx_window_errors++;
1612 if (status & TX_16_COL) lp->stats.tx_aborted_errors++;
1613 }
1614 break;
1615 case ISQ_BUFFER_EVENT:
1616 if (status & READY_FOR_TX) {
1617 /* we tried to transmit a packet earlier,
1618 but inexplicably ran out of buffers.
1619 That shouldn't happen since we only ever
1620 load one packet. Shrug. Do the right
1621 thing anyway. */
1622 netif_wake_queue(dev); /* Inform upper layers. */
1623 }
1624 if (status & TX_UNDERRUN) {
1625 if (net_debug > 0) printk("%s: transmit underrun\n", dev->name);
1626 lp->send_underrun++;
1627 if (lp->send_underrun == 3) lp->send_cmd = TX_AFTER_381;
1628 else if (lp->send_underrun == 6) lp->send_cmd = TX_AFTER_ALL;
1629 /* transmit cycle is done, although
1630 frame wasn't transmitted - this
1631 avoids having to wait for the upper
1632 layers to timeout on us, in the
1633 event of a tx underrun */
1634 netif_wake_queue(dev); /* Inform upper layers. */
1635 }
1636#if ALLOW_DMA
1637 if (lp->use_dma && (status & RX_DMA)) {
1638 int count = readreg(dev, PP_DmaFrameCnt);
1639 while(count) {
1640 if (net_debug > 5)
1641 printk("%s: receiving %d DMA frames\n", dev->name, count);
1642 if (net_debug > 2 && count >1)
1643 printk("%s: receiving %d DMA frames\n", dev->name, count);
1644 dma_rx(dev);
1645 if (--count == 0)
1646 count = readreg(dev, PP_DmaFrameCnt);
1647 if (net_debug > 2 && count > 0)
1648 printk("%s: continuing with %d DMA frames\n", dev->name, count);
1649 }
1650 }
1651#endif
1652 break;
1653 case ISQ_RX_MISS_EVENT:
1654 lp->stats.rx_missed_errors += (status >>6);
1655 break;
1656 case ISQ_TX_COL_EVENT:
1657 lp->stats.collisions += (status >>6);
1658 break;
1659 }
1660 }
1661 return IRQ_RETVAL(handled);
1662}
1663
1664static void
1665count_rx_errors(int status, struct net_local *lp)
1666{
1667 lp->stats.rx_errors++;
1668 if (status & RX_RUNT) lp->stats.rx_length_errors++;
1669 if (status & RX_EXTRA_DATA) lp->stats.rx_length_errors++;
1670 if (status & RX_CRC_ERROR) if (!(status & (RX_EXTRA_DATA|RX_RUNT)))
1671 /* per str 172 */
1672 lp->stats.rx_crc_errors++;
1673 if (status & RX_DRIBBLE) lp->stats.rx_frame_errors++;
1da177e4
LT		 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 }
e1d44477 1785 else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
1da177e4
LT		 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 */
Clone of davem's net-next-2.6 tree