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[NET]: Make NAPI polling independent of struct net_device objects.
[deliverable/linux.git] / drivers / net / dm9000.c
CommitLineData
a1365275
SH		 1/*
2 * dm9000.c: Version 1.2 03/18/2003
3 *
4 * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
5 * Copyright (C) 1997 Sten Wang
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
18 *
19 * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
20 * 06/22/2001 Support DM9801 progrmming
21 * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
22 * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
23 * R17 = (R17 & 0xfff0) | NF + 3
24 * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
25 * R17 = (R17 & 0xfff0) | NF
26 *
27 * v1.00 modify by simon 2001.9.5
28 * change for kernel 2.4.x
29 *
30 * v1.1 11/09/2001 fix force mode bug
31 *
32 * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
33 * Fixed phy reset.
34 * Added tx/rx 32 bit mode.
35 * Cleaned up for kernel merge.
36 *
37 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
38 * Port to 2.6 kernel
39 *
40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
41 * Cleanup of code to remove ifdefs
42 * Allowed platform device data to influence access width
43 * Reformatting areas of code
44 *
45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
46 * * removed 2.4 style module parameters
47 * * removed removed unused stat counter and fixed
48 * net_device_stats
49 * * introduced tx_timeout function
50 * * reworked locking
9ef9ac51
BD		 51 *
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
a1365275
SH		 55 */
56
57#include <linux/module.h>
58#include <linux/ioport.h>
59#include <linux/netdevice.h>
60#include <linux/etherdevice.h>
61#include <linux/init.h>
62#include <linux/skbuff.h>
a1365275
SH		 63#include <linux/spinlock.h>
64#include <linux/crc32.h>
65#include <linux/mii.h>
66#include <linux/dm9000.h>
67#include <linux/delay.h>
d052d1be 68#include <linux/platform_device.h>
a1365275
SH		 69
70#include <asm/delay.h>
71#include <asm/irq.h>
72#include <asm/io.h>
73
74#include "dm9000.h"
75
76/* Board/System/Debug information/definition ---------------- */
77
78#define DM9000_PHY 0x40 /* PHY address 0x01 */
79
a1365275
SH		 80#define CARDNAME "dm9000"
81#define PFX CARDNAME ": "
82
83#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
84
85#define DM9000_DEBUG 0
86
87#if DM9000_DEBUG > 2
88#define PRINTK3(args...) printk(CARDNAME ": " args)
89#else
90#define PRINTK3(args...) do { } while(0)
91#endif
92
93#if DM9000_DEBUG > 1
94#define PRINTK2(args...) printk(CARDNAME ": " args)
95#else
96#define PRINTK2(args...) do { } while(0)
97#endif
98
99#if DM9000_DEBUG > 0
100#define PRINTK1(args...) printk(CARDNAME ": " args)
101#define PRINTK(args...) printk(CARDNAME ": " args)
102#else
103#define PRINTK1(args...) do { } while(0)
104#define PRINTK(args...) printk(KERN_DEBUG args)
105#endif
106
f40d24d9
AL		 107#ifdef CONFIG_BLACKFIN
108#define readsb insb
109#define readsw insw
110#define readsl insl
111#define writesb outsb
112#define writesw outsw
113#define writesl outsl
114#define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQF_TRIGGER_HIGH)
115#else
116#define DM9000_IRQ_FLAGS IRQF_SHARED
117#endif
118
a1365275
SH		 119/*
120 * Transmit timeout, default 5 seconds.
121 */
122static int watchdog = 5000;
123module_param(watchdog, int, 0400);
124MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
125
126/* Structure/enum declaration ------------------------------- */
127typedef struct board_info {
128
129 void __iomem *io_addr; /* Register I/O base address */
130 void __iomem *io_data; /* Data I/O address */
131 u16 irq; /* IRQ */
132
133 u16 tx_pkt_cnt;
134 u16 queue_pkt_len;
135 u16 queue_start_addr;
136 u16 dbug_cnt;
137 u8 io_mode; /* 0:word, 2:byte */
138 u8 phy_addr;
139
140 void (*inblk)(void __iomem *port, void *data, int length);
141 void (*outblk)(void __iomem *port, void *data, int length);
142 void (*dumpblk)(void __iomem *port, int length);
143
144 struct resource *addr_res; /* resources found */
145 struct resource *data_res;
146 struct resource *addr_req; /* resources requested */
147 struct resource *data_req;
148 struct resource *irq_res;
149
150 struct timer_list timer;
151 struct net_device_stats stats;
152 unsigned char srom[128];
153 spinlock_t lock;
154
155 struct mii_if_info mii;
156 u32 msg_enable;
157} board_info_t;
158
159/* function declaration ------------------------------------- */
3ae5eaec 160static int dm9000_probe(struct platform_device *);
a1365275
SH		 161static int dm9000_open(struct net_device *);
162static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
163static int dm9000_stop(struct net_device *);
a1365275
SH		 164
165
166static void dm9000_timer(unsigned long);
167static void dm9000_init_dm9000(struct net_device *);
168
169static struct net_device_stats *dm9000_get_stats(struct net_device *);
170
7d12e780 171static irqreturn_t dm9000_interrupt(int, void *);
a1365275
SH		 172
173static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
174static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
175 int value);
176static u16 read_srom_word(board_info_t *, int);
177static void dm9000_rx(struct net_device *);
178static void dm9000_hash_table(struct net_device *);
179
180//#define DM9000_PROGRAM_EEPROM
181#ifdef DM9000_PROGRAM_EEPROM
182static void program_eeprom(board_info_t * db);
183#endif
184/* DM9000 network board routine ---------------------------- */
185
186static void
187dm9000_reset(board_info_t * db)
188{
189 PRINTK1("dm9000x: resetting\n");
190 /* RESET device */
191 writeb(DM9000_NCR, db->io_addr);
192 udelay(200);
193 writeb(NCR_RST, db->io_data);
194 udelay(200);
195}
196
197/*
198 * Read a byte from I/O port
199 */
200static u8
201ior(board_info_t * db, int reg)
202{
203 writeb(reg, db->io_addr);
204 return readb(db->io_data);
205}
206
207/*
208 * Write a byte to I/O port
209 */
210
211static void
212iow(board_info_t * db, int reg, int value)
213{
214 writeb(reg, db->io_addr);
215 writeb(value, db->io_data);
216}
217
218/* routines for sending block to chip */
219
220static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
221{
222 writesb(reg, data, count);
223}
224
225static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
226{
227 writesw(reg, data, (count+1) >> 1);
228}
229
230static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
231{
232 writesl(reg, data, (count+3) >> 2);
233}
234
235/* input block from chip to memory */
236
237static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
238{
5f6b5517 239 readsb(reg, data, count);
a1365275
SH		 240}
241
242
243static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
244{
245 readsw(reg, data, (count+1) >> 1);
246}
247
248static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
249{
250 readsl(reg, data, (count+3) >> 2);
251}
252
253/* dump block from chip to null */
254
255static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
256{
257 int i;
258 int tmp;
259
260 for (i = 0; i < count; i++)
261 tmp = readb(reg);
262}
263
264static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
265{
266 int i;
267 int tmp;
268
269 count = (count + 1) >> 1;
270
271 for (i = 0; i < count; i++)
272 tmp = readw(reg);
273}
274
275static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
276{
277 int i;
278 int tmp;
279
280 count = (count + 3) >> 2;
281
282 for (i = 0; i < count; i++)
283 tmp = readl(reg);
284}
285
286/* dm9000_set_io
287 *
288 * select the specified set of io routines to use with the
289 * device
290 */
291
292static void dm9000_set_io(struct board_info *db, int byte_width)
293{
294 /* use the size of the data resource to work out what IO
295 * routines we want to use
296 */
297
298 switch (byte_width) {
299 case 1:
300 db->dumpblk = dm9000_dumpblk_8bit;
301 db->outblk = dm9000_outblk_8bit;
302 db->inblk = dm9000_inblk_8bit;
303 break;
304
305 case 2:
306 db->dumpblk = dm9000_dumpblk_16bit;
307 db->outblk = dm9000_outblk_16bit;
308 db->inblk = dm9000_inblk_16bit;
309 break;
310
311 case 3:
312 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
313 db->dumpblk = dm9000_dumpblk_16bit;
314 db->outblk = dm9000_outblk_16bit;
315 db->inblk = dm9000_inblk_16bit;
316 break;
317
318 case 4:
319 default:
320 db->dumpblk = dm9000_dumpblk_32bit;
321 db->outblk = dm9000_outblk_32bit;
322 db->inblk = dm9000_inblk_32bit;
323 break;
324 }
325}
326
327
328/* Our watchdog timed out. Called by the networking layer */
329static void dm9000_timeout(struct net_device *dev)
330{
331 board_info_t *db = (board_info_t *) dev->priv;
332 u8 reg_save;
333 unsigned long flags;
334
335 /* Save previous register address */
336 reg_save = readb(db->io_addr);
9ef9ac51 337 spin_lock_irqsave(&db->lock,flags);
a1365275
SH		 338
339 netif_stop_queue(dev);
340 dm9000_reset(db);
341 dm9000_init_dm9000(dev);
342 /* We can accept TX packets again */
343 dev->trans_start = jiffies;
344 netif_wake_queue(dev);
345
346 /* Restore previous register address */
347 writeb(reg_save, db->io_addr);
9ef9ac51 348 spin_unlock_irqrestore(&db->lock,flags);
a1365275
SH		 349}
350
2fd0e33f
KH		 351#ifdef CONFIG_NET_POLL_CONTROLLER
352/*
353 *Used by netconsole
354 */
355static void dm9000_poll_controller(struct net_device *dev)
356{
357 disable_irq(dev->irq);
28431146 358 dm9000_interrupt(dev->irq,dev);
2fd0e33f
KH		 359 enable_irq(dev->irq);
360}
361#endif
a1365275
SH		 362
363/* dm9000_release_board
364 *
365 * release a board, and any mapped resources
366 */
367
368static void
369dm9000_release_board(struct platform_device *pdev, struct board_info *db)
370{
371 if (db->data_res == NULL) {
372 if (db->addr_res != NULL)
373 release_mem_region((unsigned long)db->io_addr, 4);
374 return;
375 }
376
377 /* unmap our resources */
378
379 iounmap(db->io_addr);
380 iounmap(db->io_data);
381
382 /* release the resources */
383
384 if (db->data_req != NULL) {
385 release_resource(db->data_req);
386 kfree(db->data_req);
387 }
388
51985487
DO		 389 if (db->addr_req != NULL) {
390 release_resource(db->addr_req);
a1365275
SH		 391 kfree(db->addr_req);
392 }
393}
394
395#define res_size(_r) (((_r)->end - (_r)->start) + 1)
396
397/*
398 * Search DM9000 board, allocate space and register it
399 */
400static int
3ae5eaec 401dm9000_probe(struct platform_device *pdev)
a1365275 402{
a1365275
SH		 403 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
404 struct board_info *db; /* Point a board information structure */
405 struct net_device *ndev;
406 unsigned long base;
407 int ret = 0;
408 int iosize;
409 int i;
410 u32 id_val;
411
a1365275
SH		 412 /* Init network device */
413 ndev = alloc_etherdev(sizeof (struct board_info));
414 if (!ndev) {
415 printk("%s: could not allocate device.\n", CARDNAME);
416 return -ENOMEM;
417 }
418
419 SET_MODULE_OWNER(ndev);
3ae5eaec 420 SET_NETDEV_DEV(ndev, &pdev->dev);
a1365275
SH		 421
422 PRINTK2("dm9000_probe()");
423
424 /* setup board info structure */
425 db = (struct board_info *) ndev->priv;
426 memset(db, 0, sizeof (*db));
427
9ef9ac51
BD		 428 spin_lock_init(&db->lock);
429
a1365275
SH		 430 if (pdev->num_resources < 2) {
431 ret = -ENODEV;
432 goto out;
b4ed03ff 433 } else if (pdev->num_resources == 2) {
a1365275
SH		 434 base = pdev->resource[0].start;
435
436 if (!request_mem_region(base, 4, ndev->name)) {
437 ret = -EBUSY;
438 goto out;
439 }
440
441 ndev->base_addr = base;
442 ndev->irq = pdev->resource[1].start;
b4ed03ff
BD		 443 db->io_addr = (void __iomem *)base;
444 db->io_data = (void __iomem *)(base + 4);
a1365275 445
f40d24d9
AL		 446 /* ensure at least we have a default set of IO routines */
447 dm9000_set_io(db, 2);
448
b4ed03ff 449 } else {
a1365275
SH		 450 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
451 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
452 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
453
b4ed03ff
BD		 454 if (db->addr_res == NULL || db->data_res == NULL ||
455 db->irq_res == NULL) {
a1365275
SH		 456 printk(KERN_ERR PFX "insufficient resources\n");
457 ret = -ENOENT;
458 goto out;
459 }
460
461 i = res_size(db->addr_res);
462 db->addr_req = request_mem_region(db->addr_res->start, i,
463 pdev->name);
464
465 if (db->addr_req == NULL) {
466 printk(KERN_ERR PFX "cannot claim address reg area\n");
467 ret = -EIO;
468 goto out;
469 }
470
471 db->io_addr = ioremap(db->addr_res->start, i);
472
473 if (db->io_addr == NULL) {
474 printk(KERN_ERR "failed to ioremap address reg\n");
475 ret = -EINVAL;
476 goto out;
477 }
478
479 iosize = res_size(db->data_res);
480 db->data_req = request_mem_region(db->data_res->start, iosize,
481 pdev->name);
482
483 if (db->data_req == NULL) {
484 printk(KERN_ERR PFX "cannot claim data reg area\n");
485 ret = -EIO;
486 goto out;
487 }
488
489 db->io_data = ioremap(db->data_res->start, iosize);
490
491 if (db->io_data == NULL) {
492 printk(KERN_ERR "failed to ioremap data reg\n");
493 ret = -EINVAL;
494 goto out;
495 }
496
497 /* fill in parameters for net-dev structure */
498
499 ndev->base_addr = (unsigned long)db->io_addr;
500 ndev->irq = db->irq_res->start;
501
502 /* ensure at least we have a default set of IO routines */
503 dm9000_set_io(db, iosize);
a1365275
SH		 504 }
505
506 /* check to see if anything is being over-ridden */
507 if (pdata != NULL) {
508 /* check to see if the driver wants to over-ride the
509 * default IO width */
510
511 if (pdata->flags & DM9000_PLATF_8BITONLY)
512 dm9000_set_io(db, 1);
513
514 if (pdata->flags & DM9000_PLATF_16BITONLY)
515 dm9000_set_io(db, 2);
516
517 if (pdata->flags & DM9000_PLATF_32BITONLY)
518 dm9000_set_io(db, 4);
519
520 /* check to see if there are any IO routine
521 * over-rides */
522
523 if (pdata->inblk != NULL)
524 db->inblk = pdata->inblk;
525
526 if (pdata->outblk != NULL)
527 db->outblk = pdata->outblk;
528
529 if (pdata->dumpblk != NULL)
530 db->dumpblk = pdata->dumpblk;
531 }
532
533 dm9000_reset(db);
534
535 /* try two times, DM9000 sometimes gets the first read wrong */
536 for (i = 0; i < 2; i++) {
537 id_val = ior(db, DM9000_VIDL);
538 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
539 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
540 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
541
542 if (id_val == DM9000_ID)
543 break;
544 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
545 }
546
547 if (id_val != DM9000_ID) {
548 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
549 goto release;
550 }
551
552 /* from this point we assume that we have found a DM9000 */
553
554 /* driver system function */
555 ether_setup(ndev);
556
557 ndev->open = &dm9000_open;
558 ndev->hard_start_xmit = &dm9000_start_xmit;
559 ndev->tx_timeout = &dm9000_timeout;
560 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
561 ndev->stop = &dm9000_stop;
562 ndev->get_stats = &dm9000_get_stats;
563 ndev->set_multicast_list = &dm9000_hash_table;
2fd0e33f
KH		 564#ifdef CONFIG_NET_POLL_CONTROLLER
565 ndev->poll_controller = &dm9000_poll_controller;
566#endif
a1365275
SH		 567
568#ifdef DM9000_PROGRAM_EEPROM
569 program_eeprom(db);
570#endif
571 db->msg_enable = NETIF_MSG_LINK;
572 db->mii.phy_id_mask = 0x1f;
573 db->mii.reg_num_mask = 0x1f;
574 db->mii.force_media = 0;
575 db->mii.full_duplex = 0;
576 db->mii.dev = ndev;
577 db->mii.mdio_read = dm9000_phy_read;
578 db->mii.mdio_write = dm9000_phy_write;
579
580 /* Read SROM content */
581 for (i = 0; i < 64; i++)
582 ((u16 *) db->srom)[i] = read_srom_word(db, i);
583
584 /* Set Node Address */
585 for (i = 0; i < 6; i++)
586 ndev->dev_addr[i] = db->srom[i];
587
5b55dda6
BD		 588 if (!is_valid_ether_addr(ndev->dev_addr)) {
589 /* try reading from mac */
590
591 for (i = 0; i < 6; i++)
592 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
593 }
594
a1365275
SH		 595 if (!is_valid_ether_addr(ndev->dev_addr))
596 printk("%s: Invalid ethernet MAC address. Please "
597 "set using ifconfig\n", ndev->name);
598
3ae5eaec 599 platform_set_drvdata(pdev, ndev);
a1365275
SH		 600 ret = register_netdev(ndev);
601
602 if (ret == 0) {
603 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
604 ndev->name, db->io_addr, db->io_data, ndev->irq);
605 for (i = 0; i < 5; i++)
606 printk("%02x:", ndev->dev_addr[i]);
607 printk("%02x\n", ndev->dev_addr[5]);
608 }
609 return 0;
610
611 release:
612 out:
613 printk("%s: not found (%d).\n", CARDNAME, ret);
614
615 dm9000_release_board(pdev, db);
9fd9f9b6 616 free_netdev(ndev);
a1365275
SH		 617
618 return ret;
619}
620
621/*
622 * Open the interface.
623 * The interface is opened whenever "ifconfig" actives it.
624 */
625static int
626dm9000_open(struct net_device *dev)
627{
628 board_info_t *db = (board_info_t *) dev->priv;
629
630 PRINTK2("entering dm9000_open\n");
631
f40d24d9 632 if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
a1365275
SH		 633 return -EAGAIN;
634
635 /* Initialize DM9000 board */
636 dm9000_reset(db);
637 dm9000_init_dm9000(dev);
638
639 /* Init driver variable */
640 db->dbug_cnt = 0;
641
642 /* set and active a timer process */
643 init_timer(&db->timer);
9ef9ac51 644 db->timer.expires = DM9000_TIMER_WUT;
a1365275
SH		 645 db->timer.data = (unsigned long) dev;
646 db->timer.function = &dm9000_timer;
647 add_timer(&db->timer);
648
649 mii_check_media(&db->mii, netif_msg_link(db), 1);
650 netif_start_queue(dev);
651
652 return 0;
653}
654
655/*
656 * Initilize dm9000 board
657 */
658static void
659dm9000_init_dm9000(struct net_device *dev)
660{
661 board_info_t *db = (board_info_t *) dev->priv;
662
663 PRINTK1("entering %s\n",__FUNCTION__);
664
665 /* I/O mode */
666 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
667
668 /* GPIO0 on pre-activate PHY */
669 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
670 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
671 iow(db, DM9000_GPR, 0); /* Enable PHY */
672
673 /* Program operating register */
674 iow(db, DM9000_TCR, 0); /* TX Polling clear */
675 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
676 iow(db, DM9000_FCR, 0xff); /* Flow Control */
677 iow(db, DM9000_SMCR, 0); /* Special Mode */
678 /* clear TX status */
679 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
680 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
681
682 /* Set address filter table */
683 dm9000_hash_table(dev);
684
685 /* Activate DM9000 */
686 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
687 /* Enable TX/RX interrupt mask */
688 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
689
690 /* Init Driver variable */
691 db->tx_pkt_cnt = 0;
692 db->queue_pkt_len = 0;
693 dev->trans_start = 0;
a1365275
SH		 694}
695
696/*
697 * Hardware start transmission.
698 * Send a packet to media from the upper layer.
699 */
700static int
701dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
702{
c46ac946 703 unsigned long flags;
a1365275
SH		 704 board_info_t *db = (board_info_t *) dev->priv;
705
706 PRINTK3("dm9000_start_xmit\n");
707
708 if (db->tx_pkt_cnt > 1)
709 return 1;
710
c46ac946 711 spin_lock_irqsave(&db->lock, flags);
a1365275
SH		 712
713 /* Move data to DM9000 TX RAM */
714 writeb(DM9000_MWCMD, db->io_addr);
715
716 (db->outblk)(db->io_data, skb->data, skb->len);
717 db->stats.tx_bytes += skb->len;
718
c46ac946 719 db->tx_pkt_cnt++;
a1365275 720 /* TX control: First packet immediately send, second packet queue */
c46ac946 721 if (db->tx_pkt_cnt == 1) {
a1365275
SH		 722 /* Set TX length to DM9000 */
723 iow(db, DM9000_TXPLL, skb->len & 0xff);
724 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
725
726 /* Issue TX polling command */
727 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
728
729 dev->trans_start = jiffies; /* save the time stamp */
a1365275
SH		 730 } else {
731 /* Second packet */
a1365275 732 db->queue_pkt_len = skb->len;
c46ac946 733 netif_stop_queue(dev);
a1365275
SH		 734 }
735
c46ac946
FW		 736 spin_unlock_irqrestore(&db->lock, flags);
737
a1365275
SH		 738 /* free this SKB */
739 dev_kfree_skb(skb);
740
a1365275
SH		 741 return 0;
742}
743
744static void
745dm9000_shutdown(struct net_device *dev)
746{
747 board_info_t *db = (board_info_t *) dev->priv;
748
749 /* RESET device */
750 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
751 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
752 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
753 iow(db, DM9000_RCR, 0x00); /* Disable RX */
754}
755
756/*
757 * Stop the interface.
758 * The interface is stopped when it is brought.
759 */
760static int
761dm9000_stop(struct net_device *ndev)
762{
763 board_info_t *db = (board_info_t *) ndev->priv;
764
765 PRINTK1("entering %s\n",__FUNCTION__);
766
767 /* deleted timer */
768 del_timer(&db->timer);
769
770 netif_stop_queue(ndev);
771 netif_carrier_off(ndev);
772
773 /* free interrupt */
774 free_irq(ndev->irq, ndev);
775
776 dm9000_shutdown(ndev);
777
778 return 0;
779}
780
781/*
782 * DM9000 interrupt handler
783 * receive the packet to upper layer, free the transmitted packet
784 */
785
5d22a312 786static void
a1365275
SH		 787dm9000_tx_done(struct net_device *dev, board_info_t * db)
788{
789 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
790
791 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
792 /* One packet sent complete */
793 db->tx_pkt_cnt--;
794 db->stats.tx_packets++;
795
796 /* Queue packet check & send */
797 if (db->tx_pkt_cnt > 0) {
798 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
799 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
800 iow(db, DM9000_TCR, TCR_TXREQ);
801 dev->trans_start = jiffies;
802 }
803 netif_wake_queue(dev);
804 }
805}
806
807static irqreturn_t
7d12e780 808dm9000_interrupt(int irq, void *dev_id)
a1365275
SH		 809{
810 struct net_device *dev = dev_id;
811 board_info_t *db;
812 int int_status;
813 u8 reg_save;
814
815 PRINTK3("entering %s\n",__FUNCTION__);
816
817 if (!dev) {
818 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
819 return IRQ_HANDLED;
820 }
821
822 /* A real interrupt coming */
823 db = (board_info_t *) dev->priv;
824 spin_lock(&db->lock);
825
826 /* Save previous register address */
827 reg_save = readb(db->io_addr);
828
829 /* Disable all interrupts */
830 iow(db, DM9000_IMR, IMR_PAR);
831
832 /* Got DM9000 interrupt status */
833 int_status = ior(db, DM9000_ISR); /* Got ISR */
834 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
835
836 /* Received the coming packet */
837 if (int_status & ISR_PRS)
838 dm9000_rx(dev);
839
840 /* Trnasmit Interrupt check */
841 if (int_status & ISR_PTS)
842 dm9000_tx_done(dev, db);
843
844 /* Re-enable interrupt mask */
845 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
846
847 /* Restore previous register address */
848 writeb(reg_save, db->io_addr);
849
850 spin_unlock(&db->lock);
851
852 return IRQ_HANDLED;
853}
854
855/*
856 * Get statistics from driver.
857 */
858static struct net_device_stats *
859dm9000_get_stats(struct net_device *dev)
860{
861 board_info_t *db = (board_info_t *) dev->priv;
862 return &db->stats;
863}
864
a1365275
SH		 865
866/*
867 * A periodic timer routine
868 * Dynamic media sense, allocated Rx buffer...
869 */
870static void
871dm9000_timer(unsigned long data)
872{
873 struct net_device *dev = (struct net_device *) data;
874 board_info_t *db = (board_info_t *) dev->priv;
a1365275
SH		 875
876 PRINTK3("dm9000_timer()\n");
877
a1365275
SH		 878 mii_check_media(&db->mii, netif_msg_link(db), 0);
879
a1365275
SH		 880 /* Set timer again */
881 db->timer.expires = DM9000_TIMER_WUT;
882 add_timer(&db->timer);
883}
884
885struct dm9000_rxhdr {
886 u16 RxStatus;
887 u16 RxLen;
888} __attribute__((__packed__));
889
890/*
891 * Received a packet and pass to upper layer
892 */
893static void
894dm9000_rx(struct net_device *dev)
895{
896 board_info_t *db = (board_info_t *) dev->priv;
897 struct dm9000_rxhdr rxhdr;
898 struct sk_buff *skb;
899 u8 rxbyte, *rdptr;
6478fac6 900 bool GoodPacket;
a1365275
SH		 901 int RxLen;
902
903 /* Check packet ready or not */
904 do {
905 ior(db, DM9000_MRCMDX); /* Dummy read */
906
907 /* Get most updated data */
908 rxbyte = readb(db->io_data);
909
910 /* Status check: this byte must be 0 or 1 */
911 if (rxbyte > DM9000_PKT_RDY) {
912 printk("status check failed: %d\n", rxbyte);
913 iow(db, DM9000_RCR, 0x00); /* Stop Device */
914 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
915 return;
916 }
917
918 if (rxbyte != DM9000_PKT_RDY)
919 return;
920
921 /* A packet ready now & Get status/length */
6478fac6 922 GoodPacket = true;
a1365275
SH		 923 writeb(DM9000_MRCMD, db->io_addr);
924
925 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
926
927 RxLen = rxhdr.RxLen;
928
929 /* Packet Status check */
930 if (RxLen < 0x40) {
6478fac6 931 GoodPacket = false;
a1365275
SH		 932 PRINTK1("Bad Packet received (runt)\n");
933 }
934
935 if (RxLen > DM9000_PKT_MAX) {
936 PRINTK1("RST: RX Len:%x\n", RxLen);
937 }
938
939 if (rxhdr.RxStatus & 0xbf00) {
6478fac6 940 GoodPacket = false;
a1365275
SH		 941 if (rxhdr.RxStatus & 0x100) {
942 PRINTK1("fifo error\n");
943 db->stats.rx_fifo_errors++;
944 }
945 if (rxhdr.RxStatus & 0x200) {
946 PRINTK1("crc error\n");
947 db->stats.rx_crc_errors++;
948 }
949 if (rxhdr.RxStatus & 0x8000) {
950 PRINTK1("length error\n");
951 db->stats.rx_length_errors++;
952 }
953 }
954
955 /* Move data from DM9000 */
956 if (GoodPacket
957 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
a1365275
SH		 958 skb_reserve(skb, 2);
959 rdptr = (u8 *) skb_put(skb, RxLen - 4);
960
961 /* Read received packet from RX SRAM */
962
963 (db->inblk)(db->io_data, rdptr, RxLen);
964 db->stats.rx_bytes += RxLen;
965
966 /* Pass to upper layer */
967 skb->protocol = eth_type_trans(skb, dev);
968 netif_rx(skb);
969 db->stats.rx_packets++;
970
971 } else {
972 /* need to dump the packet's data */
973
974 (db->dumpblk)(db->io_data, RxLen);
975 }
976 } while (rxbyte == DM9000_PKT_RDY);
977}
978
979/*
980 * Read a word data from SROM
981 */
982static u16
983read_srom_word(board_info_t * db, int offset)
984{
985 iow(db, DM9000_EPAR, offset);
986 iow(db, DM9000_EPCR, EPCR_ERPRR);
987 mdelay(8); /* according to the datasheet 200us should be enough,
988 but it doesn't work */
989 iow(db, DM9000_EPCR, 0x0);
990 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
991}
992
993#ifdef DM9000_PROGRAM_EEPROM
994/*
995 * Write a word data to SROM
996 */
997static void
998write_srom_word(board_info_t * db, int offset, u16 val)
999{
1000 iow(db, DM9000_EPAR, offset);
1001 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1002 iow(db, DM9000_EPDRL, (val & 0xff));
1003 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1004 mdelay(8); /* same shit */
1005 iow(db, DM9000_EPCR, 0);
1006}
1007
1008/*
1009 * Only for development:
1010 * Here we write static data to the eeprom in case
1011 * we don't have valid content on a new board
1012 */
1013static void
1014program_eeprom(board_info_t * db)
1015{
1016 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1017 0x0000, /* Autoload: accept nothing */
1018 0x0a46, 0x9000, /* Vendor / Product ID */
1019 0x0000, /* pin control */
1020 0x0000,
1021 }; /* Wake-up mode control */
1022 int i;
1023 for (i = 0; i < 8; i++)
1024 write_srom_word(db, i, eeprom[i]);
1025}
1026#endif
1027
1028
1029/*
1030 * Calculate the CRC valude of the Rx packet
1031 * flag = 1 : return the reverse CRC (for the received packet CRC)
1032 * 0 : return the normal CRC (for Hash Table index)
1033 */
1034
1035static unsigned long
1036cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1037{
1038
1039 u32 crc = ether_crc_le(Len, Data);
1040
1041 if (flag)
1042 return ~crc;
1043
1044 return crc;
1045}
1046
1047/*
1048 * Set DM9000 multicast address
1049 */
1050static void
1051dm9000_hash_table(struct net_device *dev)
1052{
1053 board_info_t *db = (board_info_t *) dev->priv;
1054 struct dev_mc_list *mcptr = dev->mc_list;
1055 int mc_cnt = dev->mc_count;
1056 u32 hash_val;
1057 u16 i, oft, hash_table[4];
1058 unsigned long flags;
1059
1060 PRINTK2("dm9000_hash_table()\n");
1061
1062 spin_lock_irqsave(&db->lock,flags);
1063
1064 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1065 iow(db, oft, dev->dev_addr[i]);
1066
1067 /* Clear Hash Table */
1068 for (i = 0; i < 4; i++)
1069 hash_table[i] = 0x0;
1070
1071 /* broadcast address */
1072 hash_table[3] = 0x8000;
1073
1074 /* the multicast address in Hash Table : 64 bits */
1075 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1076 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1077 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1078 }
1079
1080 /* Write the hash table to MAC MD table */
1081 for (i = 0, oft = 0x16; i < 4; i++) {
1082 iow(db, oft++, hash_table[i] & 0xff);
1083 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1084 }
1085
1086 spin_unlock_irqrestore(&db->lock,flags);
1087}
1088
1089
1090/*
1091 * Read a word from phyxcer
1092 */
1093static int
1094dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1095{
1096 board_info_t *db = (board_info_t *) dev->priv;
1097 unsigned long flags;
9ef9ac51 1098 unsigned int reg_save;
a1365275
SH		 1099 int ret;
1100
1101 spin_lock_irqsave(&db->lock,flags);
9ef9ac51
BD		 1102
1103 /* Save previous register address */
1104 reg_save = readb(db->io_addr);
1105
a1365275
SH		 1106 /* Fill the phyxcer register into REG_0C */
1107 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1108
1109 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1110 udelay(100); /* Wait read complete */
1111 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1112
1113 /* The read data keeps on REG_0D & REG_0E */
1114 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1115
9ef9ac51
BD		 1116 /* restore the previous address */
1117 writeb(reg_save, db->io_addr);
1118
a1365275
SH		 1119 spin_unlock_irqrestore(&db->lock,flags);
1120
1121 return ret;
1122}
1123
1124/*
1125 * Write a word to phyxcer
1126 */
1127static void
1128dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1129{
1130 board_info_t *db = (board_info_t *) dev->priv;
1131 unsigned long flags;
9ef9ac51 1132 unsigned long reg_save;
a1365275
SH		 1133
1134 spin_lock_irqsave(&db->lock,flags);
1135
9ef9ac51
BD		 1136 /* Save previous register address */
1137 reg_save = readb(db->io_addr);
1138
a1365275
SH		 1139 /* Fill the phyxcer register into REG_0C */
1140 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1141
1142 /* Fill the written data into REG_0D & REG_0E */
1143 iow(db, DM9000_EPDRL, (value & 0xff));
1144 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1145
1146 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1147 udelay(500); /* Wait write complete */
1148 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1149
9ef9ac51
BD		 1150 /* restore the previous address */
1151 writeb(reg_save, db->io_addr);
1152
a1365275
SH		 1153 spin_unlock_irqrestore(&db->lock,flags);
1154}
1155
1156static int
3ae5eaec 1157dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
a1365275 1158{
3ae5eaec 1159 struct net_device *ndev = platform_get_drvdata(dev);
a1365275 1160
9480e307 1161 if (ndev) {
a1365275
SH		 1162 if (netif_running(ndev)) {
1163 netif_device_detach(ndev);
1164 dm9000_shutdown(ndev);
1165 }
1166 }
1167 return 0;
1168}
1169
1170static int
3ae5eaec 1171dm9000_drv_resume(struct platform_device *dev)
a1365275 1172{
3ae5eaec 1173 struct net_device *ndev = platform_get_drvdata(dev);
a1365275
SH		 1174 board_info_t *db = (board_info_t *) ndev->priv;
1175
9480e307 1176 if (ndev) {
a1365275
SH		 1177
1178 if (netif_running(ndev)) {
1179 dm9000_reset(db);
1180 dm9000_init_dm9000(ndev);
1181
1182 netif_device_attach(ndev);
1183 }
1184 }
1185 return 0;
1186}
1187
1188static int
3ae5eaec 1189dm9000_drv_remove(struct platform_device *pdev)
a1365275 1190{
3ae5eaec 1191 struct net_device *ndev = platform_get_drvdata(pdev);
a1365275 1192
3ae5eaec 1193 platform_set_drvdata(pdev, NULL);
a1365275
SH		 1194
1195 unregister_netdev(ndev);
1196 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
9fd9f9b6 1197 free_netdev(ndev); /* free device structure */
a1365275
SH		 1198
1199 PRINTK1("clean_module() exit\n");
1200
1201 return 0;
1202}
1203
3ae5eaec 1204static struct platform_driver dm9000_driver = {
5d22a312
BD		 1205 .driver = {
1206 .name = "dm9000",
1207 .owner = THIS_MODULE,
1208 },
a1365275
SH		 1209 .probe = dm9000_probe,
1210 .remove = dm9000_drv_remove,
1211 .suspend = dm9000_drv_suspend,
1212 .resume = dm9000_drv_resume,
1213};
1214
1215static int __init
1216dm9000_init(void)
1217{
2ae2d77c
BD		 1218 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1219
3ae5eaec 1220 return platform_driver_register(&dm9000_driver); /* search board and register */
a1365275
SH		 1221}
1222
1223static void __exit
1224dm9000_cleanup(void)
1225{
3ae5eaec 1226 platform_driver_unregister(&dm9000_driver);
a1365275
SH		 1227}
1228
1229module_init(dm9000_init);
1230module_exit(dm9000_cleanup);
1231
1232MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1233MODULE_DESCRIPTION("Davicom DM9000 network driver");
1234MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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