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