blob: 615d2b14efa71bbb5f5ff0de37d97afd74451e4c [file] [log] [blame]
Sascha Hauera1365272005-05-05 15:14:15 -07001/*
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
Ben Dooks9ef9ac52005-07-23 17:25:18 +010051 *
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
Sascha Hauera1365272005-05-05 15:14:15 -070055 */
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>
Sascha Hauera1365272005-05-05 15:14:15 -070063#include <linux/spinlock.h>
64#include <linux/crc32.h>
65#include <linux/mii.h>
66#include <linux/dm9000.h>
67#include <linux/delay.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010068#include <linux/platform_device.h>
Sascha Hauera1365272005-05-05 15:14:15 -070069
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 ------------------------------------- */
Russell King3ae5eae2005-11-09 22:32:44 +0000151static int dm9000_probe(struct platform_device *);
Sascha Hauera1365272005-05-05 15:14:15 -0700152static int dm9000_open(struct net_device *);
153static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
154static int dm9000_stop(struct net_device *);
Sascha Hauera1365272005-05-05 15:14:15 -0700155
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
David Howells7d12e782006-10-05 14:55:46 +0100162static irqreturn_t dm9000_interrupt(int, void *);
Sascha Hauera1365272005-05-05 15:14:15 -0700163
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{
Sascha Hauer5f6b5512005-06-20 15:32:51 -0700230 readsb(reg, data, count);
Sascha Hauera1365272005-05-05 15:14:15 -0700231}
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);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100328 spin_lock_irqsave(&db->lock,flags);
Sascha Hauera1365272005-05-05 15:14:15 -0700329
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);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100339 spin_unlock_irqrestore(&db->lock,flags);
Sascha Hauera1365272005-05-05 15:14:15 -0700340}
341
Kevin Hao2fd0e332006-08-14 23:00:15 -0700342#ifdef CONFIG_NET_POLL_CONTROLLER
343/*
344 *Used by netconsole
345 */
346static void dm9000_poll_controller(struct net_device *dev)
347{
348 disable_irq(dev->irq);
Al Viro28431142006-10-08 15:00:12 +0100349 dm9000_interrupt(dev->irq,dev);
Kevin Hao2fd0e332006-08-14 23:00:15 -0700350 enable_irq(dev->irq);
351}
352#endif
Sascha Hauera1365272005-05-05 15:14:15 -0700353
354/* dm9000_release_board
355 *
356 * release a board, and any mapped resources
357 */
358
359static void
360dm9000_release_board(struct platform_device *pdev, struct board_info *db)
361{
362 if (db->data_res == NULL) {
363 if (db->addr_res != NULL)
364 release_mem_region((unsigned long)db->io_addr, 4);
365 return;
366 }
367
368 /* unmap our resources */
369
370 iounmap(db->io_addr);
371 iounmap(db->io_data);
372
373 /* release the resources */
374
375 if (db->data_req != NULL) {
376 release_resource(db->data_req);
377 kfree(db->data_req);
378 }
379
Dirk Opfer51985482006-09-06 19:53:32 +0200380 if (db->addr_req != NULL) {
381 release_resource(db->addr_req);
Sascha Hauera1365272005-05-05 15:14:15 -0700382 kfree(db->addr_req);
383 }
384}
385
386#define res_size(_r) (((_r)->end - (_r)->start) + 1)
387
388/*
389 * Search DM9000 board, allocate space and register it
390 */
391static int
Russell King3ae5eae2005-11-09 22:32:44 +0000392dm9000_probe(struct platform_device *pdev)
Sascha Hauera1365272005-05-05 15:14:15 -0700393{
Sascha Hauera1365272005-05-05 15:14:15 -0700394 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
395 struct board_info *db; /* Point a board information structure */
396 struct net_device *ndev;
397 unsigned long base;
398 int ret = 0;
399 int iosize;
400 int i;
401 u32 id_val;
402
Sascha Hauera1365272005-05-05 15:14:15 -0700403 /* Init network device */
404 ndev = alloc_etherdev(sizeof (struct board_info));
405 if (!ndev) {
406 printk("%s: could not allocate device.\n", CARDNAME);
407 return -ENOMEM;
408 }
409
410 SET_MODULE_OWNER(ndev);
Russell King3ae5eae2005-11-09 22:32:44 +0000411 SET_NETDEV_DEV(ndev, &pdev->dev);
Sascha Hauera1365272005-05-05 15:14:15 -0700412
413 PRINTK2("dm9000_probe()");
414
415 /* setup board info structure */
416 db = (struct board_info *) ndev->priv;
417 memset(db, 0, sizeof (*db));
418
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100419 spin_lock_init(&db->lock);
420
Sascha Hauera1365272005-05-05 15:14:15 -0700421 if (pdev->num_resources < 2) {
422 ret = -ENODEV;
423 goto out;
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100424 } else if (pdev->num_resources == 2) {
Sascha Hauera1365272005-05-05 15:14:15 -0700425 base = pdev->resource[0].start;
426
427 if (!request_mem_region(base, 4, ndev->name)) {
428 ret = -EBUSY;
429 goto out;
430 }
431
432 ndev->base_addr = base;
433 ndev->irq = pdev->resource[1].start;
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100434 db->io_addr = (void __iomem *)base;
435 db->io_data = (void __iomem *)(base + 4);
Sascha Hauera1365272005-05-05 15:14:15 -0700436
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100437 } else {
Sascha Hauera1365272005-05-05 15:14:15 -0700438 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
439 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
440 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
441
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100442 if (db->addr_res == NULL || db->data_res == NULL ||
443 db->irq_res == NULL) {
Sascha Hauera1365272005-05-05 15:14:15 -0700444 printk(KERN_ERR PFX "insufficient resources\n");
445 ret = -ENOENT;
446 goto out;
447 }
448
449 i = res_size(db->addr_res);
450 db->addr_req = request_mem_region(db->addr_res->start, i,
451 pdev->name);
452
453 if (db->addr_req == NULL) {
454 printk(KERN_ERR PFX "cannot claim address reg area\n");
455 ret = -EIO;
456 goto out;
457 }
458
459 db->io_addr = ioremap(db->addr_res->start, i);
460
461 if (db->io_addr == NULL) {
462 printk(KERN_ERR "failed to ioremap address reg\n");
463 ret = -EINVAL;
464 goto out;
465 }
466
467 iosize = res_size(db->data_res);
468 db->data_req = request_mem_region(db->data_res->start, iosize,
469 pdev->name);
470
471 if (db->data_req == NULL) {
472 printk(KERN_ERR PFX "cannot claim data reg area\n");
473 ret = -EIO;
474 goto out;
475 }
476
477 db->io_data = ioremap(db->data_res->start, iosize);
478
479 if (db->io_data == NULL) {
480 printk(KERN_ERR "failed to ioremap data reg\n");
481 ret = -EINVAL;
482 goto out;
483 }
484
485 /* fill in parameters for net-dev structure */
486
487 ndev->base_addr = (unsigned long)db->io_addr;
488 ndev->irq = db->irq_res->start;
489
490 /* ensure at least we have a default set of IO routines */
491 dm9000_set_io(db, iosize);
Sascha Hauera1365272005-05-05 15:14:15 -0700492 }
493
494 /* check to see if anything is being over-ridden */
495 if (pdata != NULL) {
496 /* check to see if the driver wants to over-ride the
497 * default IO width */
498
499 if (pdata->flags & DM9000_PLATF_8BITONLY)
500 dm9000_set_io(db, 1);
501
502 if (pdata->flags & DM9000_PLATF_16BITONLY)
503 dm9000_set_io(db, 2);
504
505 if (pdata->flags & DM9000_PLATF_32BITONLY)
506 dm9000_set_io(db, 4);
507
508 /* check to see if there are any IO routine
509 * over-rides */
510
511 if (pdata->inblk != NULL)
512 db->inblk = pdata->inblk;
513
514 if (pdata->outblk != NULL)
515 db->outblk = pdata->outblk;
516
517 if (pdata->dumpblk != NULL)
518 db->dumpblk = pdata->dumpblk;
519 }
520
521 dm9000_reset(db);
522
523 /* try two times, DM9000 sometimes gets the first read wrong */
524 for (i = 0; i < 2; i++) {
525 id_val = ior(db, DM9000_VIDL);
526 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
527 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
528 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
529
530 if (id_val == DM9000_ID)
531 break;
532 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
533 }
534
535 if (id_val != DM9000_ID) {
536 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
537 goto release;
538 }
539
540 /* from this point we assume that we have found a DM9000 */
541
542 /* driver system function */
543 ether_setup(ndev);
544
545 ndev->open = &dm9000_open;
546 ndev->hard_start_xmit = &dm9000_start_xmit;
547 ndev->tx_timeout = &dm9000_timeout;
548 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
549 ndev->stop = &dm9000_stop;
550 ndev->get_stats = &dm9000_get_stats;
551 ndev->set_multicast_list = &dm9000_hash_table;
Kevin Hao2fd0e332006-08-14 23:00:15 -0700552#ifdef CONFIG_NET_POLL_CONTROLLER
553 ndev->poll_controller = &dm9000_poll_controller;
554#endif
Sascha Hauera1365272005-05-05 15:14:15 -0700555
556#ifdef DM9000_PROGRAM_EEPROM
557 program_eeprom(db);
558#endif
559 db->msg_enable = NETIF_MSG_LINK;
560 db->mii.phy_id_mask = 0x1f;
561 db->mii.reg_num_mask = 0x1f;
562 db->mii.force_media = 0;
563 db->mii.full_duplex = 0;
564 db->mii.dev = ndev;
565 db->mii.mdio_read = dm9000_phy_read;
566 db->mii.mdio_write = dm9000_phy_write;
567
568 /* Read SROM content */
569 for (i = 0; i < 64; i++)
570 ((u16 *) db->srom)[i] = read_srom_word(db, i);
571
572 /* Set Node Address */
573 for (i = 0; i < 6; i++)
574 ndev->dev_addr[i] = db->srom[i];
575
Ben Dooks5b55dda2006-06-13 23:50:15 +0100576 if (!is_valid_ether_addr(ndev->dev_addr)) {
577 /* try reading from mac */
578
579 for (i = 0; i < 6; i++)
580 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
581 }
582
Sascha Hauera1365272005-05-05 15:14:15 -0700583 if (!is_valid_ether_addr(ndev->dev_addr))
584 printk("%s: Invalid ethernet MAC address. Please "
585 "set using ifconfig\n", ndev->name);
586
Russell King3ae5eae2005-11-09 22:32:44 +0000587 platform_set_drvdata(pdev, ndev);
Sascha Hauera1365272005-05-05 15:14:15 -0700588 ret = register_netdev(ndev);
589
590 if (ret == 0) {
591 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
592 ndev->name, db->io_addr, db->io_data, ndev->irq);
593 for (i = 0; i < 5; i++)
594 printk("%02x:", ndev->dev_addr[i]);
595 printk("%02x\n", ndev->dev_addr[5]);
596 }
597 return 0;
598
599 release:
600 out:
601 printk("%s: not found (%d).\n", CARDNAME, ret);
602
603 dm9000_release_board(pdev, db);
604 kfree(ndev);
605
606 return ret;
607}
608
609/*
610 * Open the interface.
611 * The interface is opened whenever "ifconfig" actives it.
612 */
613static int
614dm9000_open(struct net_device *dev)
615{
616 board_info_t *db = (board_info_t *) dev->priv;
617
618 PRINTK2("entering dm9000_open\n");
619
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700620 if (request_irq(dev->irq, &dm9000_interrupt, IRQF_SHARED, dev->name, dev))
Sascha Hauera1365272005-05-05 15:14:15 -0700621 return -EAGAIN;
622
623 /* Initialize DM9000 board */
624 dm9000_reset(db);
625 dm9000_init_dm9000(dev);
626
627 /* Init driver variable */
628 db->dbug_cnt = 0;
629
630 /* set and active a timer process */
631 init_timer(&db->timer);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100632 db->timer.expires = DM9000_TIMER_WUT;
Sascha Hauera1365272005-05-05 15:14:15 -0700633 db->timer.data = (unsigned long) dev;
634 db->timer.function = &dm9000_timer;
635 add_timer(&db->timer);
636
637 mii_check_media(&db->mii, netif_msg_link(db), 1);
638 netif_start_queue(dev);
639
640 return 0;
641}
642
643/*
644 * Initilize dm9000 board
645 */
646static void
647dm9000_init_dm9000(struct net_device *dev)
648{
649 board_info_t *db = (board_info_t *) dev->priv;
650
651 PRINTK1("entering %s\n",__FUNCTION__);
652
653 /* I/O mode */
654 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
655
656 /* GPIO0 on pre-activate PHY */
657 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
658 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
659 iow(db, DM9000_GPR, 0); /* Enable PHY */
660
661 /* Program operating register */
662 iow(db, DM9000_TCR, 0); /* TX Polling clear */
663 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
664 iow(db, DM9000_FCR, 0xff); /* Flow Control */
665 iow(db, DM9000_SMCR, 0); /* Special Mode */
666 /* clear TX status */
667 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
668 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
669
670 /* Set address filter table */
671 dm9000_hash_table(dev);
672
673 /* Activate DM9000 */
674 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
675 /* Enable TX/RX interrupt mask */
676 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
677
678 /* Init Driver variable */
679 db->tx_pkt_cnt = 0;
680 db->queue_pkt_len = 0;
681 dev->trans_start = 0;
Sascha Hauera1365272005-05-05 15:14:15 -0700682}
683
684/*
685 * Hardware start transmission.
686 * Send a packet to media from the upper layer.
687 */
688static int
689dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
690{
691 board_info_t *db = (board_info_t *) dev->priv;
692
693 PRINTK3("dm9000_start_xmit\n");
694
695 if (db->tx_pkt_cnt > 1)
696 return 1;
697
698 netif_stop_queue(dev);
699
700 /* Disable all interrupts */
701 iow(db, DM9000_IMR, IMR_PAR);
702
703 /* Move data to DM9000 TX RAM */
704 writeb(DM9000_MWCMD, db->io_addr);
705
706 (db->outblk)(db->io_data, skb->data, skb->len);
707 db->stats.tx_bytes += skb->len;
708
709 /* TX control: First packet immediately send, second packet queue */
710 if (db->tx_pkt_cnt == 0) {
711
712 /* First Packet */
713 db->tx_pkt_cnt++;
714
715 /* Set TX length to DM9000 */
716 iow(db, DM9000_TXPLL, skb->len & 0xff);
717 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
718
719 /* Issue TX polling command */
720 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
721
722 dev->trans_start = jiffies; /* save the time stamp */
723
724 } else {
725 /* Second packet */
726 db->tx_pkt_cnt++;
727 db->queue_pkt_len = skb->len;
728 }
729
730 /* free this SKB */
731 dev_kfree_skb(skb);
732
733 /* Re-enable resource check */
734 if (db->tx_pkt_cnt == 1)
735 netif_wake_queue(dev);
736
737 /* Re-enable interrupt */
738 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
739
740 return 0;
741}
742
743static void
744dm9000_shutdown(struct net_device *dev)
745{
746 board_info_t *db = (board_info_t *) dev->priv;
747
748 /* RESET device */
749 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
750 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
751 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
752 iow(db, DM9000_RCR, 0x00); /* Disable RX */
753}
754
755/*
756 * Stop the interface.
757 * The interface is stopped when it is brought.
758 */
759static int
760dm9000_stop(struct net_device *ndev)
761{
762 board_info_t *db = (board_info_t *) ndev->priv;
763
764 PRINTK1("entering %s\n",__FUNCTION__);
765
766 /* deleted timer */
767 del_timer(&db->timer);
768
769 netif_stop_queue(ndev);
770 netif_carrier_off(ndev);
771
772 /* free interrupt */
773 free_irq(ndev->irq, ndev);
774
775 dm9000_shutdown(ndev);
776
777 return 0;
778}
779
780/*
781 * DM9000 interrupt handler
782 * receive the packet to upper layer, free the transmitted packet
783 */
784
Ben Dooks5d22a312006-06-14 00:09:17 +0100785static void
Sascha Hauera1365272005-05-05 15:14:15 -0700786dm9000_tx_done(struct net_device *dev, board_info_t * db)
787{
788 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
789
790 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
791 /* One packet sent complete */
792 db->tx_pkt_cnt--;
793 db->stats.tx_packets++;
794
795 /* Queue packet check & send */
796 if (db->tx_pkt_cnt > 0) {
797 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
798 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
799 iow(db, DM9000_TCR, TCR_TXREQ);
800 dev->trans_start = jiffies;
801 }
802 netif_wake_queue(dev);
803 }
804}
805
806static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +0100807dm9000_interrupt(int irq, void *dev_id)
Sascha Hauera1365272005-05-05 15:14:15 -0700808{
809 struct net_device *dev = dev_id;
810 board_info_t *db;
811 int int_status;
812 u8 reg_save;
813
814 PRINTK3("entering %s\n",__FUNCTION__);
815
816 if (!dev) {
817 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
818 return IRQ_HANDLED;
819 }
820
821 /* A real interrupt coming */
822 db = (board_info_t *) dev->priv;
823 spin_lock(&db->lock);
824
825 /* Save previous register address */
826 reg_save = readb(db->io_addr);
827
828 /* Disable all interrupts */
829 iow(db, DM9000_IMR, IMR_PAR);
830
831 /* Got DM9000 interrupt status */
832 int_status = ior(db, DM9000_ISR); /* Got ISR */
833 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
834
835 /* Received the coming packet */
836 if (int_status & ISR_PRS)
837 dm9000_rx(dev);
838
839 /* Trnasmit Interrupt check */
840 if (int_status & ISR_PTS)
841 dm9000_tx_done(dev, db);
842
843 /* Re-enable interrupt mask */
844 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
845
846 /* Restore previous register address */
847 writeb(reg_save, db->io_addr);
848
849 spin_unlock(&db->lock);
850
851 return IRQ_HANDLED;
852}
853
854/*
855 * Get statistics from driver.
856 */
857static struct net_device_stats *
858dm9000_get_stats(struct net_device *dev)
859{
860 board_info_t *db = (board_info_t *) dev->priv;
861 return &db->stats;
862}
863
Sascha Hauera1365272005-05-05 15:14:15 -0700864
865/*
866 * A periodic timer routine
867 * Dynamic media sense, allocated Rx buffer...
868 */
869static void
870dm9000_timer(unsigned long data)
871{
872 struct net_device *dev = (struct net_device *) data;
873 board_info_t *db = (board_info_t *) dev->priv;
Sascha Hauera1365272005-05-05 15:14:15 -0700874
875 PRINTK3("dm9000_timer()\n");
876
Sascha Hauera1365272005-05-05 15:14:15 -0700877 mii_check_media(&db->mii, netif_msg_link(db), 0);
878
Sascha Hauera1365272005-05-05 15:14:15 -0700879 /* Set timer again */
880 db->timer.expires = DM9000_TIMER_WUT;
881 add_timer(&db->timer);
882}
883
884struct dm9000_rxhdr {
885 u16 RxStatus;
886 u16 RxLen;
887} __attribute__((__packed__));
888
889/*
890 * Received a packet and pass to upper layer
891 */
892static void
893dm9000_rx(struct net_device *dev)
894{
895 board_info_t *db = (board_info_t *) dev->priv;
896 struct dm9000_rxhdr rxhdr;
897 struct sk_buff *skb;
898 u8 rxbyte, *rdptr;
899 int GoodPacket;
900 int RxLen;
901
902 /* Check packet ready or not */
903 do {
904 ior(db, DM9000_MRCMDX); /* Dummy read */
905
906 /* Get most updated data */
907 rxbyte = readb(db->io_data);
908
909 /* Status check: this byte must be 0 or 1 */
910 if (rxbyte > DM9000_PKT_RDY) {
911 printk("status check failed: %d\n", rxbyte);
912 iow(db, DM9000_RCR, 0x00); /* Stop Device */
913 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
914 return;
915 }
916
917 if (rxbyte != DM9000_PKT_RDY)
918 return;
919
920 /* A packet ready now & Get status/length */
921 GoodPacket = TRUE;
922 writeb(DM9000_MRCMD, db->io_addr);
923
924 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
925
926 RxLen = rxhdr.RxLen;
927
928 /* Packet Status check */
929 if (RxLen < 0x40) {
930 GoodPacket = FALSE;
931 PRINTK1("Bad Packet received (runt)\n");
932 }
933
934 if (RxLen > DM9000_PKT_MAX) {
935 PRINTK1("RST: RX Len:%x\n", RxLen);
936 }
937
938 if (rxhdr.RxStatus & 0xbf00) {
939 GoodPacket = FALSE;
940 if (rxhdr.RxStatus & 0x100) {
941 PRINTK1("fifo error\n");
942 db->stats.rx_fifo_errors++;
943 }
944 if (rxhdr.RxStatus & 0x200) {
945 PRINTK1("crc error\n");
946 db->stats.rx_crc_errors++;
947 }
948 if (rxhdr.RxStatus & 0x8000) {
949 PRINTK1("length error\n");
950 db->stats.rx_length_errors++;
951 }
952 }
953
954 /* Move data from DM9000 */
955 if (GoodPacket
956 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
957 skb->dev = dev;
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;
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001098 unsigned int reg_save;
Sascha Hauera1365272005-05-05 15:14:15 -07001099 int ret;
1100
1101 spin_lock_irqsave(&db->lock,flags);
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001102
1103 /* Save previous register address */
1104 reg_save = readb(db->io_addr);
1105
Sascha Hauera1365272005-05-05 15:14:15 -07001106 /* 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
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001116 /* restore the previous address */
1117 writeb(reg_save, db->io_addr);
1118
Sascha Hauera1365272005-05-05 15:14:15 -07001119 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;
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001132 unsigned long reg_save;
Sascha Hauera1365272005-05-05 15:14:15 -07001133
1134 spin_lock_irqsave(&db->lock,flags);
1135
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001136 /* Save previous register address */
1137 reg_save = readb(db->io_addr);
1138
Sascha Hauera1365272005-05-05 15:14:15 -07001139 /* 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
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001150 /* restore the previous address */
1151 writeb(reg_save, db->io_addr);
1152
Sascha Hauera1365272005-05-05 15:14:15 -07001153 spin_unlock_irqrestore(&db->lock,flags);
1154}
1155
1156static int
Russell King3ae5eae2005-11-09 22:32:44 +00001157dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
Sascha Hauera1365272005-05-05 15:14:15 -07001158{
Russell King3ae5eae2005-11-09 22:32:44 +00001159 struct net_device *ndev = platform_get_drvdata(dev);
Sascha Hauera1365272005-05-05 15:14:15 -07001160
Russell King9480e302005-10-28 09:52:56 -07001161 if (ndev) {
Sascha Hauera1365272005-05-05 15:14:15 -07001162 if (netif_running(ndev)) {
1163 netif_device_detach(ndev);
1164 dm9000_shutdown(ndev);
1165 }
1166 }
1167 return 0;
1168}
1169
1170static int
Russell King3ae5eae2005-11-09 22:32:44 +00001171dm9000_drv_resume(struct platform_device *dev)
Sascha Hauera1365272005-05-05 15:14:15 -07001172{
Russell King3ae5eae2005-11-09 22:32:44 +00001173 struct net_device *ndev = platform_get_drvdata(dev);
Sascha Hauera1365272005-05-05 15:14:15 -07001174 board_info_t *db = (board_info_t *) ndev->priv;
1175
Russell King9480e302005-10-28 09:52:56 -07001176 if (ndev) {
Sascha Hauera1365272005-05-05 15:14:15 -07001177
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
Russell King3ae5eae2005-11-09 22:32:44 +00001189dm9000_drv_remove(struct platform_device *pdev)
Sascha Hauera1365272005-05-05 15:14:15 -07001190{
Russell King3ae5eae2005-11-09 22:32:44 +00001191 struct net_device *ndev = platform_get_drvdata(pdev);
Sascha Hauera1365272005-05-05 15:14:15 -07001192
Russell King3ae5eae2005-11-09 22:32:44 +00001193 platform_set_drvdata(pdev, NULL);
Sascha Hauera1365272005-05-05 15:14:15 -07001194
1195 unregister_netdev(ndev);
1196 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1197 kfree(ndev); /* free device structure */
1198
1199 PRINTK1("clean_module() exit\n");
1200
1201 return 0;
1202}
1203
Russell King3ae5eae2005-11-09 22:32:44 +00001204static struct platform_driver dm9000_driver = {
Ben Dooks5d22a312006-06-14 00:09:17 +01001205 .driver = {
1206 .name = "dm9000",
1207 .owner = THIS_MODULE,
1208 },
Sascha Hauera1365272005-05-05 15:14:15 -07001209 .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{
Ben Dooks2ae2d772005-07-23 17:29:38 +01001218 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1219
Russell King3ae5eae2005-11-09 22:32:44 +00001220 return platform_driver_register(&dm9000_driver); /* search board and register */
Sascha Hauera1365272005-05-05 15:14:15 -07001221}
1222
1223static void __exit
1224dm9000_cleanup(void)
1225{
Russell King3ae5eae2005-11-09 22:32:44 +00001226 platform_driver_unregister(&dm9000_driver);
Sascha Hauera1365272005-05-05 15:14:15 -07001227}
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");