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