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drivers/net/: all drivers/net/ cleanup with ARRAY_SIZE
[linux-2.6-block.git] / drivers / net / dm9000.c
CommitLineData
a1365275
SH		 1/*
2 * dm9000.c: Version 1.2 03/18/2003
3 *
4 * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
5 * Copyright (C) 1997 Sten Wang
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
18 *
19 * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
20 * 06/22/2001 Support DM9801 progrmming
21 * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
22 * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
23 * R17 = (R17 & 0xfff0) | NF + 3
24 * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
25 * R17 = (R17 & 0xfff0) | NF
26 *
27 * v1.00 modify by simon 2001.9.5
28 * change for kernel 2.4.x
29 *
30 * v1.1 11/09/2001 fix force mode bug
31 *
32 * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
33 * Fixed phy reset.
34 * Added tx/rx 32 bit mode.
35 * Cleaned up for kernel merge.
36 *
37 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
38 * Port to 2.6 kernel
39 *
40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
41 * Cleanup of code to remove ifdefs
42 * Allowed platform device data to influence access width
43 * Reformatting areas of code
44 *
45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
46 * * removed 2.4 style module parameters
47 * * removed removed unused stat counter and fixed
48 * net_device_stats
49 * * introduced tx_timeout function
50 * * reworked locking
9ef9ac51
BD		 51 *
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
a1365275
SH		 55 */
56
57#include <linux/module.h>
58#include <linux/ioport.h>
59#include <linux/netdevice.h>
60#include <linux/etherdevice.h>
61#include <linux/init.h>
62#include <linux/skbuff.h>
a1365275
SH		 63#include <linux/spinlock.h>
64#include <linux/crc32.h>
65#include <linux/mii.h>
66#include <linux/dm9000.h>
67#include <linux/delay.h>
d052d1be 68#include <linux/platform_device.h>
a1365275
SH		 69
70#include <asm/delay.h>
71#include <asm/irq.h>
72#include <asm/io.h>
73
74#include "dm9000.h"
75
76/* Board/System/Debug information/definition ---------------- */
77
78#define DM9000_PHY 0x40 /* PHY address 0x01 */
79
a1365275
SH		 80#define CARDNAME "dm9000"
81#define PFX CARDNAME ": "
82
83#define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
84
85#define DM9000_DEBUG 0
86
87#if DM9000_DEBUG > 2
88#define PRINTK3(args...) printk(CARDNAME ": " args)
89#else
90#define PRINTK3(args...) do { } while(0)
91#endif
92
93#if DM9000_DEBUG > 1
94#define PRINTK2(args...) printk(CARDNAME ": " args)
95#else
96#define PRINTK2(args...) do { } while(0)
97#endif
98
99#if DM9000_DEBUG > 0
100#define PRINTK1(args...) printk(CARDNAME ": " args)
101#define PRINTK(args...) printk(CARDNAME ": " args)
102#else
103#define PRINTK1(args...) do { } while(0)
104#define PRINTK(args...) printk(KERN_DEBUG args)
105#endif
106
f40d24d9
AL		 107#ifdef CONFIG_BLACKFIN
108#define readsb insb
109#define readsw insw
110#define readsl insl
111#define writesb outsb
112#define writesw outsw
113#define writesl outsl
114#define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQF_TRIGGER_HIGH)
115#else
116#define DM9000_IRQ_FLAGS IRQF_SHARED
117#endif
118
a1365275
SH		 119/*
120 * Transmit timeout, default 5 seconds.
121 */
122static int watchdog = 5000;
123module_param(watchdog, int, 0400);
124MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
125
126/* Structure/enum declaration ------------------------------- */
127typedef struct board_info {
128
129 void __iomem *io_addr; /* Register I/O base address */
130 void __iomem *io_data; /* Data I/O address */
131 u16 irq; /* IRQ */
132
133 u16 tx_pkt_cnt;
134 u16 queue_pkt_len;
135 u16 queue_start_addr;
136 u16 dbug_cnt;
137 u8 io_mode; /* 0:word, 2:byte */
138 u8 phy_addr;
139
140 void (*inblk)(void __iomem *port, void *data, int length);
141 void (*outblk)(void __iomem *port, void *data, int length);
142 void (*dumpblk)(void __iomem *port, int length);
143
144 struct resource *addr_res; /* resources found */
145 struct resource *data_res;
146 struct resource *addr_req; /* resources requested */
147 struct resource *data_req;
148 struct resource *irq_res;
149
150 struct timer_list timer;
151 struct net_device_stats stats;
152 unsigned char srom[128];
153 spinlock_t lock;
154
155 struct mii_if_info mii;
156 u32 msg_enable;
157} board_info_t;
158
159/* function declaration ------------------------------------- */
3ae5eaec 160static int dm9000_probe(struct platform_device *);
a1365275
SH		 161static int dm9000_open(struct net_device *);
162static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
163static int dm9000_stop(struct net_device *);
a1365275
SH		 164
165
166static void dm9000_timer(unsigned long);
167static void dm9000_init_dm9000(struct net_device *);
168
169static struct net_device_stats *dm9000_get_stats(struct net_device *);
170
7d12e780 171static irqreturn_t dm9000_interrupt(int, void *);
a1365275
SH		 172
173static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
174static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
175 int value);
176static u16 read_srom_word(board_info_t *, int);
177static void dm9000_rx(struct net_device *);
178static void dm9000_hash_table(struct net_device *);
179
180//#define DM9000_PROGRAM_EEPROM
181#ifdef DM9000_PROGRAM_EEPROM
182static void program_eeprom(board_info_t * db);
183#endif
184/* DM9000 network board routine ---------------------------- */
185
186static void
187dm9000_reset(board_info_t * db)
188{
189 PRINTK1("dm9000x: resetting\n");
190 /* RESET device */
191 writeb(DM9000_NCR, db->io_addr);
192 udelay(200);
193 writeb(NCR_RST, db->io_data);
194 udelay(200);
195}
196
197/*
198 * Read a byte from I/O port
199 */
200static u8
201ior(board_info_t * db, int reg)
202{
203 writeb(reg, db->io_addr);
204 return readb(db->io_data);
205}
206
207/*
208 * Write a byte to I/O port
209 */
210
211static void
212iow(board_info_t * db, int reg, int value)
213{
214 writeb(reg, db->io_addr);
215 writeb(value, db->io_data);
216}
217
218/* routines for sending block to chip */
219
220static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
221{
222 writesb(reg, data, count);
223}
224
225static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
226{
227 writesw(reg, data, (count+1) >> 1);
228}
229
230static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
231{
232 writesl(reg, data, (count+3) >> 2);
233}
234
235/* input block from chip to memory */
236
237static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
238{
5f6b5517 239 readsb(reg, data, count);
a1365275
SH		 240}
241
242
243static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
244{
245 readsw(reg, data, (count+1) >> 1);
246}
247
248static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
249{
250 readsl(reg, data, (count+3) >> 2);
251}
252
253/* dump block from chip to null */
254
255static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
256{
257 int i;
258 int tmp;
259
260 for (i = 0; i < count; i++)
261 tmp = readb(reg);
262}
263
264static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
265{
266 int i;
267 int tmp;
268
269 count = (count + 1) >> 1;
270
271 for (i = 0; i < count; i++)
272 tmp = readw(reg);
273}
274
275static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
276{
277 int i;
278 int tmp;
279
280 count = (count + 3) >> 2;
281
282 for (i = 0; i < count; i++)
283 tmp = readl(reg);
284}
285
286/* dm9000_set_io
287 *
288 * select the specified set of io routines to use with the
289 * device
290 */
291
292static void dm9000_set_io(struct board_info *db, int byte_width)
293{
294 /* use the size of the data resource to work out what IO
295 * routines we want to use
296 */
297
298 switch (byte_width) {
299 case 1:
300 db->dumpblk = dm9000_dumpblk_8bit;
301 db->outblk = dm9000_outblk_8bit;
302 db->inblk = dm9000_inblk_8bit;
303 break;
304
305 case 2:
306 db->dumpblk = dm9000_dumpblk_16bit;
307 db->outblk = dm9000_outblk_16bit;
308 db->inblk = dm9000_inblk_16bit;
309 break;
310
311 case 3:
312 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
313 db->dumpblk = dm9000_dumpblk_16bit;
314 db->outblk = dm9000_outblk_16bit;
315 db->inblk = dm9000_inblk_16bit;
316 break;
317
318 case 4:
319 default:
320 db->dumpblk = dm9000_dumpblk_32bit;
321 db->outblk = dm9000_outblk_32bit;
322 db->inblk = dm9000_inblk_32bit;
323 break;
324 }
325}
326
327
328/* Our watchdog timed out. Called by the networking layer */
329static void dm9000_timeout(struct net_device *dev)
330{
331 board_info_t *db = (board_info_t *) dev->priv;
332 u8 reg_save;
333 unsigned long flags;
334
335 /* Save previous register address */
336 reg_save = readb(db->io_addr);
9ef9ac51 337 spin_lock_irqsave(&db->lock,flags);
a1365275
SH		 338
339 netif_stop_queue(dev);
340 dm9000_reset(db);
341 dm9000_init_dm9000(dev);
342 /* We can accept TX packets again */
343 dev->trans_start = jiffies;
344 netif_wake_queue(dev);
345
346 /* Restore previous register address */
347 writeb(reg_save, db->io_addr);
9ef9ac51 348 spin_unlock_irqrestore(&db->lock,flags);
a1365275
SH		 349}
350
2fd0e33f
KH		 351#ifdef CONFIG_NET_POLL_CONTROLLER
352/*
353 *Used by netconsole
354 */
355static void dm9000_poll_controller(struct net_device *dev)
356{
357 disable_irq(dev->irq);
28431146 358 dm9000_interrupt(dev->irq,dev);
2fd0e33f
KH		 359 enable_irq(dev->irq);
360}
361#endif
a1365275
SH		 362
363/* dm9000_release_board
364 *
365 * release a board, and any mapped resources
366 */
367
368static void
369dm9000_release_board(struct platform_device *pdev, struct board_info *db)
370{
371 if (db->data_res == NULL) {
372 if (db->addr_res != NULL)
373 release_mem_region((unsigned long)db->io_addr, 4);
374 return;
375 }
376
377 /* unmap our resources */
378
379 iounmap(db->io_addr);
380 iounmap(db->io_data);
381
382 /* release the resources */
383
384 if (db->data_req != NULL) {
385 release_resource(db->data_req);
386 kfree(db->data_req);
387 }
388
51985487
DO		 389 if (db->addr_req != NULL) {
390 release_resource(db->addr_req);
a1365275
SH		 391 kfree(db->addr_req);
392 }
393}
394
395#define res_size(_r) (((_r)->end - (_r)->start) + 1)
396
397/*
398 * Search DM9000 board, allocate space and register it
399 */
400static int
3ae5eaec 401dm9000_probe(struct platform_device *pdev)
a1365275 402{
a1365275
SH		 403 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
404 struct board_info *db; /* Point a board information structure */
405 struct net_device *ndev;
406 unsigned long base;
407 int ret = 0;
408 int iosize;
409 int i;
410 u32 id_val;
411
a1365275
SH		 412 /* Init network device */
413 ndev = alloc_etherdev(sizeof (struct board_info));
414 if (!ndev) {
415 printk("%s: could not allocate device.\n", CARDNAME);
416 return -ENOMEM;
417 }
418
3ae5eaec 419 SET_NETDEV_DEV(ndev, &pdev->dev);
a1365275
SH		 420
421 PRINTK2("dm9000_probe()");
422
423 /* setup board info structure */
424 db = (struct board_info *) ndev->priv;
425 memset(db, 0, sizeof (*db));
426
9ef9ac51
BD		 427 spin_lock_init(&db->lock);
428
a1365275
SH		 429 if (pdev->num_resources < 2) {
430 ret = -ENODEV;
431 goto out;
b4ed03ff 432 } else if (pdev->num_resources == 2) {
a1365275
SH		 433 base = pdev->resource[0].start;
434
435 if (!request_mem_region(base, 4, ndev->name)) {
436 ret = -EBUSY;
437 goto out;
438 }
439
440 ndev->base_addr = base;
441 ndev->irq = pdev->resource[1].start;
b4ed03ff
BD		 442 db->io_addr = (void __iomem *)base;
443 db->io_data = (void __iomem *)(base + 4);
a1365275 444
f40d24d9
AL		 445 /* ensure at least we have a default set of IO routines */
446 dm9000_set_io(db, 2);
447
b4ed03ff 448 } else {
a1365275
SH		 449 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
450 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
451 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
452
b4ed03ff
BD		 453 if (db->addr_res == NULL || db->data_res == NULL ||
454 db->irq_res == NULL) {
a1365275
SH		 455 printk(KERN_ERR PFX "insufficient resources\n");
456 ret = -ENOENT;
457 goto out;
458 }
459
460 i = res_size(db->addr_res);
461 db->addr_req = request_mem_region(db->addr_res->start, i,
462 pdev->name);
463
464 if (db->addr_req == NULL) {
465 printk(KERN_ERR PFX "cannot claim address reg area\n");
466 ret = -EIO;
467 goto out;
468 }
469
470 db->io_addr = ioremap(db->addr_res->start, i);
471
472 if (db->io_addr == NULL) {
473 printk(KERN_ERR "failed to ioremap address reg\n");
474 ret = -EINVAL;
475 goto out;
476 }
477
478 iosize = res_size(db->data_res);
479 db->data_req = request_mem_region(db->data_res->start, iosize,
480 pdev->name);
481
482 if (db->data_req == NULL) {
483 printk(KERN_ERR PFX "cannot claim data reg area\n");
484 ret = -EIO;
485 goto out;
486 }
487
488 db->io_data = ioremap(db->data_res->start, iosize);
489
490 if (db->io_data == NULL) {
491 printk(KERN_ERR "failed to ioremap data reg\n");
492 ret = -EINVAL;
493 goto out;
494 }
495
496 /* fill in parameters for net-dev structure */
497
498 ndev->base_addr = (unsigned long)db->io_addr;
499 ndev->irq = db->irq_res->start;
500
501 /* ensure at least we have a default set of IO routines */
502 dm9000_set_io(db, iosize);
a1365275
SH		 503 }
504
505 /* check to see if anything is being over-ridden */
506 if (pdata != NULL) {
507 /* check to see if the driver wants to over-ride the
508 * default IO width */
509
510 if (pdata->flags & DM9000_PLATF_8BITONLY)
511 dm9000_set_io(db, 1);
512
513 if (pdata->flags & DM9000_PLATF_16BITONLY)
514 dm9000_set_io(db, 2);
515
516 if (pdata->flags & DM9000_PLATF_32BITONLY)
517 dm9000_set_io(db, 4);
518
519 /* check to see if there are any IO routine
520 * over-rides */
521
522 if (pdata->inblk != NULL)
523 db->inblk = pdata->inblk;
524
525 if (pdata->outblk != NULL)
526 db->outblk = pdata->outblk;
527
528 if (pdata->dumpblk != NULL)
529 db->dumpblk = pdata->dumpblk;
530 }
531
532 dm9000_reset(db);
533
534 /* try two times, DM9000 sometimes gets the first read wrong */
535 for (i = 0; i < 2; i++) {
536 id_val = ior(db, DM9000_VIDL);
537 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
538 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
539 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
540
541 if (id_val == DM9000_ID)
542 break;
543 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
544 }
545
546 if (id_val != DM9000_ID) {
547 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
548 goto release;
549 }
550
551 /* from this point we assume that we have found a DM9000 */
552
553 /* driver system function */
554 ether_setup(ndev);
555
556 ndev->open = &dm9000_open;
557 ndev->hard_start_xmit = &dm9000_start_xmit;
558 ndev->tx_timeout = &dm9000_timeout;
559 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
560 ndev->stop = &dm9000_stop;
561 ndev->get_stats = &dm9000_get_stats;
562 ndev->set_multicast_list = &dm9000_hash_table;
2fd0e33f
KH		 563#ifdef CONFIG_NET_POLL_CONTROLLER
564 ndev->poll_controller = &dm9000_poll_controller;
565#endif
a1365275
SH		 566
567#ifdef DM9000_PROGRAM_EEPROM
568 program_eeprom(db);
569#endif
570 db->msg_enable = NETIF_MSG_LINK;
571 db->mii.phy_id_mask = 0x1f;
572 db->mii.reg_num_mask = 0x1f;
573 db->mii.force_media = 0;
574 db->mii.full_duplex = 0;
575 db->mii.dev = ndev;
576 db->mii.mdio_read = dm9000_phy_read;
577 db->mii.mdio_write = dm9000_phy_write;
578
579 /* Read SROM content */
580 for (i = 0; i < 64; i++)
581 ((u16 *) db->srom)[i] = read_srom_word(db, i);
582
583 /* Set Node Address */
584 for (i = 0; i < 6; i++)
585 ndev->dev_addr[i] = db->srom[i];
586
5b55dda6
BD		 587 if (!is_valid_ether_addr(ndev->dev_addr)) {
588 /* try reading from mac */
589
590 for (i = 0; i < 6; i++)
591 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
592 }
593
a1365275
SH		 594 if (!is_valid_ether_addr(ndev->dev_addr))
595 printk("%s: Invalid ethernet MAC address. Please "
596 "set using ifconfig\n", ndev->name);
597
3ae5eaec 598 platform_set_drvdata(pdev, ndev);
a1365275
SH		 599 ret = register_netdev(ndev);
600
601 if (ret == 0) {
602 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
603 ndev->name, db->io_addr, db->io_data, ndev->irq);
604 for (i = 0; i < 5; i++)
605 printk("%02x:", ndev->dev_addr[i]);
606 printk("%02x\n", ndev->dev_addr[5]);
607 }
608 return 0;
609
610 release:
611 out:
612 printk("%s: not found (%d).\n", CARDNAME, ret);
613
614 dm9000_release_board(pdev, db);
9fd9f9b6 615 free_netdev(ndev);
a1365275
SH		 616
617 return ret;
618}
619
620/*
621 * Open the interface.
622 * The interface is opened whenever "ifconfig" actives it.
623 */
624static int
625dm9000_open(struct net_device *dev)
626{
627 board_info_t *db = (board_info_t *) dev->priv;
628
629 PRINTK2("entering dm9000_open\n");
630
f40d24d9 631 if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
a1365275
SH		 632 return -EAGAIN;
633
634 /* Initialize DM9000 board */
635 dm9000_reset(db);
636 dm9000_init_dm9000(dev);
637
638 /* Init driver variable */
639 db->dbug_cnt = 0;
640
641 /* set and active a timer process */
642 init_timer(&db->timer);
9ef9ac51 643 db->timer.expires = DM9000_TIMER_WUT;
a1365275
SH		 644 db->timer.data = (unsigned long) dev;
645 db->timer.function = &dm9000_timer;
646 add_timer(&db->timer);
647
648 mii_check_media(&db->mii, netif_msg_link(db), 1);
649 netif_start_queue(dev);
650
651 return 0;
652}
653
654/*
655 * Initilize dm9000 board
656 */
657static void
658dm9000_init_dm9000(struct net_device *dev)
659{
660 board_info_t *db = (board_info_t *) dev->priv;
661
662 PRINTK1("entering %s\n",__FUNCTION__);
663
664 /* I/O mode */
665 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
666
667 /* GPIO0 on pre-activate PHY */
668 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
669 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
670 iow(db, DM9000_GPR, 0); /* Enable PHY */
671
672 /* Program operating register */
673 iow(db, DM9000_TCR, 0); /* TX Polling clear */
674 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
675 iow(db, DM9000_FCR, 0xff); /* Flow Control */
676 iow(db, DM9000_SMCR, 0); /* Special Mode */
677 /* clear TX status */
678 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
679 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
680
681 /* Set address filter table */
682 dm9000_hash_table(dev);
683
684 /* Activate DM9000 */
685 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
686 /* Enable TX/RX interrupt mask */
687 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
688
689 /* Init Driver variable */
690 db->tx_pkt_cnt = 0;
691 db->queue_pkt_len = 0;
692 dev->trans_start = 0;
a1365275
SH		 693}
694
695/*
696 * Hardware start transmission.
697 * Send a packet to media from the upper layer.
698 */
699static int
700dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
701{
c46ac946 702 unsigned long flags;
a1365275
SH		 703 board_info_t *db = (board_info_t *) dev->priv;
704
705 PRINTK3("dm9000_start_xmit\n");
706
707 if (db->tx_pkt_cnt > 1)
708 return 1;
709
c46ac946 710 spin_lock_irqsave(&db->lock, flags);
a1365275
SH		 711
712 /* Move data to DM9000 TX RAM */
713 writeb(DM9000_MWCMD, db->io_addr);
714
715 (db->outblk)(db->io_data, skb->data, skb->len);
716 db->stats.tx_bytes += skb->len;
717
c46ac946 718 db->tx_pkt_cnt++;
a1365275 719 /* TX control: First packet immediately send, second packet queue */
c46ac946 720 if (db->tx_pkt_cnt == 1) {
a1365275
SH		 721 /* Set TX length to DM9000 */
722 iow(db, DM9000_TXPLL, skb->len & 0xff);
723 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
724
725 /* Issue TX polling command */
726 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
727
728 dev->trans_start = jiffies; /* save the time stamp */
a1365275
SH		 729 } else {
730 /* Second packet */
a1365275 731 db->queue_pkt_len = skb->len;
c46ac946 732 netif_stop_queue(dev);
a1365275
SH		 733 }
734
c46ac946
FW		 735 spin_unlock_irqrestore(&db->lock, flags);
736
a1365275
SH		 737 /* free this SKB */
738 dev_kfree_skb(skb);
739
a1365275
SH		 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
5d22a312 785static void
a1365275
SH		 786dm9000_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
7d12e780 807dm9000_interrupt(int irq, void *dev_id)
a1365275
SH		 808{
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
a1365275
SH		 864
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;
a1365275
SH		 874
875 PRINTK3("dm9000_timer()\n");
876
a1365275
SH		 877 mii_check_media(&db->mii, netif_msg_link(db), 0);
878
a1365275
SH		 879 /* 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;
6478fac6 899 bool GoodPacket;
a1365275
SH		 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 */
6478fac6 921 GoodPacket = true;
a1365275
SH		 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) {
6478fac6 930 GoodPacket = false;
a1365275
SH		 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) {
6478fac6 939 GoodPacket = false;
a1365275
SH		 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)) {
a1365275
SH		 957 skb_reserve(skb, 2);
958 rdptr = (u8 *) skb_put(skb, RxLen - 4);
959
960 /* Read received packet from RX SRAM */
961
962 (db->inblk)(db->io_data, rdptr, RxLen);
963 db->stats.rx_bytes += RxLen;
964
965 /* Pass to upper layer */
966 skb->protocol = eth_type_trans(skb, dev);
967 netif_rx(skb);
968 db->stats.rx_packets++;
969
970 } else {
971 /* need to dump the packet's data */
972
973 (db->dumpblk)(db->io_data, RxLen);
974 }
975 } while (rxbyte == DM9000_PKT_RDY);
976}
977
978/*
979 * Read a word data from SROM
980 */
981static u16
982read_srom_word(board_info_t * db, int offset)
983{
984 iow(db, DM9000_EPAR, offset);
985 iow(db, DM9000_EPCR, EPCR_ERPRR);
986 mdelay(8); /* according to the datasheet 200us should be enough,
987 but it doesn't work */
988 iow(db, DM9000_EPCR, 0x0);
989 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
990}
991
992#ifdef DM9000_PROGRAM_EEPROM
993/*
994 * Write a word data to SROM
995 */
996static void
997write_srom_word(board_info_t * db, int offset, u16 val)
998{
999 iow(db, DM9000_EPAR, offset);
1000 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1001 iow(db, DM9000_EPDRL, (val & 0xff));
1002 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1003 mdelay(8); /* same shit */
1004 iow(db, DM9000_EPCR, 0);
1005}
1006
1007/*
1008 * Only for development:
1009 * Here we write static data to the eeprom in case
1010 * we don't have valid content on a new board
1011 */
1012static void
1013program_eeprom(board_info_t * db)
1014{
1015 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1016 0x0000, /* Autoload: accept nothing */
1017 0x0a46, 0x9000, /* Vendor / Product ID */
1018 0x0000, /* pin control */
1019 0x0000,
1020 }; /* Wake-up mode control */
1021 int i;
1022 for (i = 0; i < 8; i++)
1023 write_srom_word(db, i, eeprom[i]);
1024}
1025#endif
1026
1027
1028/*
1029 * Calculate the CRC valude of the Rx packet
1030 * flag = 1 : return the reverse CRC (for the received packet CRC)
1031 * 0 : return the normal CRC (for Hash Table index)
1032 */
1033
1034static unsigned long
1035cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1036{
1037
1038 u32 crc = ether_crc_le(Len, Data);
1039
1040 if (flag)
1041 return ~crc;
1042
1043 return crc;
1044}
1045
1046/*
1047 * Set DM9000 multicast address
1048 */
1049static void
1050dm9000_hash_table(struct net_device *dev)
1051{
1052 board_info_t *db = (board_info_t *) dev->priv;
1053 struct dev_mc_list *mcptr = dev->mc_list;
1054 int mc_cnt = dev->mc_count;
1055 u32 hash_val;
1056 u16 i, oft, hash_table[4];
1057 unsigned long flags;
1058
1059 PRINTK2("dm9000_hash_table()\n");
1060
1061 spin_lock_irqsave(&db->lock,flags);
1062
1063 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1064 iow(db, oft, dev->dev_addr[i]);
1065
1066 /* Clear Hash Table */
1067 for (i = 0; i < 4; i++)
1068 hash_table[i] = 0x0;
1069
1070 /* broadcast address */
1071 hash_table[3] = 0x8000;
1072
1073 /* the multicast address in Hash Table : 64 bits */
1074 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1075 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1076 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1077 }
1078
1079 /* Write the hash table to MAC MD table */
1080 for (i = 0, oft = 0x16; i < 4; i++) {
1081 iow(db, oft++, hash_table[i] & 0xff);
1082 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1083 }
1084
1085 spin_unlock_irqrestore(&db->lock,flags);
1086}
1087
1088
1089/*
1090 * Read a word from phyxcer
1091 */
1092static int
1093dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1094{
1095 board_info_t *db = (board_info_t *) dev->priv;
1096 unsigned long flags;
9ef9ac51 1097 unsigned int reg_save;
a1365275
SH		 1098 int ret;
1099
1100 spin_lock_irqsave(&db->lock,flags);
9ef9ac51
BD		 1101
1102 /* Save previous register address */
1103 reg_save = readb(db->io_addr);
1104
a1365275
SH		 1105 /* Fill the phyxcer register into REG_0C */
1106 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1107
1108 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1109 udelay(100); /* Wait read complete */
1110 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1111
1112 /* The read data keeps on REG_0D & REG_0E */
1113 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1114
9ef9ac51
BD		 1115 /* restore the previous address */
1116 writeb(reg_save, db->io_addr);
1117
a1365275
SH		 1118 spin_unlock_irqrestore(&db->lock,flags);
1119
1120 return ret;
1121}
1122
1123/*
1124 * Write a word to phyxcer
1125 */
1126static void
1127dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1128{
1129 board_info_t *db = (board_info_t *) dev->priv;
1130 unsigned long flags;
9ef9ac51 1131 unsigned long reg_save;
a1365275
SH		 1132
1133 spin_lock_irqsave(&db->lock,flags);
1134
9ef9ac51
BD		 1135 /* Save previous register address */
1136 reg_save = readb(db->io_addr);
1137
a1365275
SH		 1138 /* Fill the phyxcer register into REG_0C */
1139 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1140
1141 /* Fill the written data into REG_0D & REG_0E */
1142 iow(db, DM9000_EPDRL, (value & 0xff));
1143 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1144
1145 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1146 udelay(500); /* Wait write complete */
1147 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1148
9ef9ac51
BD		 1149 /* restore the previous address */
1150 writeb(reg_save, db->io_addr);
1151
a1365275
SH		 1152 spin_unlock_irqrestore(&db->lock,flags);
1153}
1154
1155static int
3ae5eaec 1156dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
a1365275 1157{
3ae5eaec 1158 struct net_device *ndev = platform_get_drvdata(dev);
a1365275 1159
9480e307 1160 if (ndev) {
a1365275
SH		 1161 if (netif_running(ndev)) {
1162 netif_device_detach(ndev);
1163 dm9000_shutdown(ndev);
1164 }
1165 }
1166 return 0;
1167}
1168
1169static int
3ae5eaec 1170dm9000_drv_resume(struct platform_device *dev)
a1365275 1171{
3ae5eaec 1172 struct net_device *ndev = platform_get_drvdata(dev);
a1365275
SH		 1173 board_info_t *db = (board_info_t *) ndev->priv;
1174
9480e307 1175 if (ndev) {
a1365275
SH		 1176
1177 if (netif_running(ndev)) {
1178 dm9000_reset(db);
1179 dm9000_init_dm9000(ndev);
1180
1181 netif_device_attach(ndev);
1182 }
1183 }
1184 return 0;
1185}
1186
1187static int
3ae5eaec 1188dm9000_drv_remove(struct platform_device *pdev)
a1365275 1189{
3ae5eaec 1190 struct net_device *ndev = platform_get_drvdata(pdev);
a1365275 1191
3ae5eaec 1192 platform_set_drvdata(pdev, NULL);
a1365275
SH		 1193
1194 unregister_netdev(ndev);
1195 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
9fd9f9b6 1196 free_netdev(ndev); /* free device structure */
a1365275
SH		 1197
1198 PRINTK1("clean_module() exit\n");
1199
1200 return 0;
1201}
1202
3ae5eaec 1203static struct platform_driver dm9000_driver = {
5d22a312
BD		 1204 .driver = {
1205 .name = "dm9000",
1206 .owner = THIS_MODULE,
1207 },
a1365275
SH		 1208 .probe = dm9000_probe,
1209 .remove = dm9000_drv_remove,
1210 .suspend = dm9000_drv_suspend,
1211 .resume = dm9000_drv_resume,
1212};
1213
1214static int __init
1215dm9000_init(void)
1216{
2ae2d77c
BD		 1217 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1218
3ae5eaec 1219 return platform_driver_register(&dm9000_driver); /* search board and register */
a1365275
SH		 1220}
1221
1222static void __exit
1223dm9000_cleanup(void)
1224{
3ae5eaec 1225 platform_driver_unregister(&dm9000_driver);
a1365275
SH		 1226}
1227
1228module_init(dm9000_init);
1229module_exit(dm9000_cleanup);
1230
1231MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1232MODULE_DESCRIPTION("Davicom DM9000 network driver");
1233MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)