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Sascha Hauera1365272005-05-05 15:14:15 -07001/*
Ben Dooks41c340f2008-02-05 00:02:15 +00002 * Davicom DM9000 Fast Ethernet driver for Linux.
Sascha Hauera1365272005-05-05 15:14:15 -07003 * Copyright (C) 1997 Sten Wang
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
Ben Dooks41c340f2008-02-05 00:02:15 +000015 * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
Sascha Hauera1365272005-05-05 15:14:15 -070016 *
Ben Dooks41c340f2008-02-05 00:02:15 +000017 * Additional updates, Copyright:
18 * Ben Dooks <ben@simtec.co.uk>
19 * Sascha Hauer <s.hauer@pengutronix.de>
Sascha Hauera1365272005-05-05 15:14:15 -070020 */
21
22#include <linux/module.h>
23#include <linux/ioport.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/init.h>
27#include <linux/skbuff.h>
Sascha Hauera1365272005-05-05 15:14:15 -070028#include <linux/spinlock.h>
29#include <linux/crc32.h>
30#include <linux/mii.h>
Ben Dooks7da99852008-02-05 00:02:06 +000031#include <linux/ethtool.h>
Sascha Hauera1365272005-05-05 15:14:15 -070032#include <linux/dm9000.h>
33#include <linux/delay.h>
Russell Kingd052d1b2005-10-29 19:07:23 +010034#include <linux/platform_device.h>
Daniel Mack4e4fc052008-01-23 14:54:50 +010035#include <linux/irq.h>
Sascha Hauera1365272005-05-05 15:14:15 -070036
37#include <asm/delay.h>
38#include <asm/irq.h>
39#include <asm/io.h>
40
41#include "dm9000.h"
42
43/* Board/System/Debug information/definition ---------------- */
44
45#define DM9000_PHY 0x40 /* PHY address 0x01 */
46
Sascha Hauera1365272005-05-05 15:14:15 -070047#define CARDNAME "dm9000"
48#define PFX CARDNAME ": "
Ben Dooks7da99852008-02-05 00:02:06 +000049#define DRV_VERSION "1.30"
Sascha Hauera1365272005-05-05 15:14:15 -070050
Alex Landauf40d24d2007-07-12 12:11:48 +080051#ifdef CONFIG_BLACKFIN
52#define readsb insb
53#define readsw insw
54#define readsl insl
55#define writesb outsb
56#define writesw outsw
57#define writesl outsl
Ben Dooks1a5f1c42008-02-05 00:02:04 +000058#define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
Alex Landauf40d24d2007-07-12 12:11:48 +080059#else
Ben Dooks1a5f1c42008-02-05 00:02:04 +000060#define DEFAULT_TRIGGER (0)
Alex Landauf40d24d2007-07-12 12:11:48 +080061#endif
62
Sascha Hauera1365272005-05-05 15:14:15 -070063/*
64 * Transmit timeout, default 5 seconds.
65 */
66static int watchdog = 5000;
67module_param(watchdog, int, 0400);
68MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
69
Ben Dooks9a2f0372008-02-05 00:02:10 +000070/* DM9000 register address locking.
71 *
72 * The DM9000 uses an address register to control where data written
73 * to the data register goes. This means that the address register
74 * must be preserved over interrupts or similar calls.
75 *
76 * During interrupt and other critical calls, a spinlock is used to
77 * protect the system, but the calls themselves save the address
78 * in the address register in case they are interrupting another
79 * access to the device.
80 *
81 * For general accesses a lock is provided so that calls which are
82 * allowed to sleep are serialised so that the address register does
83 * not need to be saved. This lock also serves to serialise access
84 * to the EEPROM and PHY access registers which are shared between
85 * these two devices.
86 */
87
Sascha Hauera1365272005-05-05 15:14:15 -070088/* Structure/enum declaration ------------------------------- */
89typedef struct board_info {
90
91 void __iomem *io_addr; /* Register I/O base address */
92 void __iomem *io_data; /* Data I/O address */
93 u16 irq; /* IRQ */
94
95 u16 tx_pkt_cnt;
96 u16 queue_pkt_len;
97 u16 queue_start_addr;
98 u16 dbug_cnt;
99 u8 io_mode; /* 0:word, 2:byte */
100 u8 phy_addr;
Ben Dooks33ba5092008-02-05 00:02:01 +0000101 unsigned int flags;
Ben Dooks321f69a2008-02-05 00:02:08 +0000102 unsigned int in_suspend :1;
Sascha Hauera1365272005-05-05 15:14:15 -0700103
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000104 int debug_level;
105
Sascha Hauera1365272005-05-05 15:14:15 -0700106 void (*inblk)(void __iomem *port, void *data, int length);
107 void (*outblk)(void __iomem *port, void *data, int length);
108 void (*dumpblk)(void __iomem *port, int length);
109
Ben Dooksa76836f2008-02-05 00:02:02 +0000110 struct device *dev; /* parent device */
111
Sascha Hauera1365272005-05-05 15:14:15 -0700112 struct resource *addr_res; /* resources found */
113 struct resource *data_res;
114 struct resource *addr_req; /* resources requested */
115 struct resource *data_req;
116 struct resource *irq_res;
117
Ben Dooks9a2f0372008-02-05 00:02:10 +0000118 struct mutex addr_lock; /* phy and eeprom access lock */
119
Sascha Hauera1365272005-05-05 15:14:15 -0700120 spinlock_t lock;
121
122 struct mii_if_info mii;
123 u32 msg_enable;
124} board_info_t;
125
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000126/* debug code */
127
128#define dm9000_dbg(db, lev, msg...) do { \
129 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
130 (lev) < db->debug_level) { \
131 dev_dbg(db->dev, msg); \
132 } \
133} while (0)
134
Ben Dooks7da99852008-02-05 00:02:06 +0000135static inline board_info_t *to_dm9000_board(struct net_device *dev)
136{
137 return dev->priv;
138}
139
Sascha Hauera1365272005-05-05 15:14:15 -0700140/* function declaration ------------------------------------- */
Russell King3ae5eae2005-11-09 22:32:44 +0000141static int dm9000_probe(struct platform_device *);
Sascha Hauera1365272005-05-05 15:14:15 -0700142static int dm9000_open(struct net_device *);
143static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
144static int dm9000_stop(struct net_device *);
Ben Dooksf42d8ae2008-02-05 00:02:21 +0000145static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd);
Sascha Hauera1365272005-05-05 15:14:15 -0700146
Sascha Hauera1365272005-05-05 15:14:15 -0700147static void dm9000_init_dm9000(struct net_device *);
148
David Howells7d12e782006-10-05 14:55:46 +0100149static irqreturn_t dm9000_interrupt(int, void *);
Sascha Hauera1365272005-05-05 15:14:15 -0700150
151static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
152static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
153 int value);
Ben Dooks86c62fa2008-02-05 00:02:09 +0000154
Ben Dooks29d52e52008-02-05 00:02:11 +0000155static void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
156static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
Sascha Hauera1365272005-05-05 15:14:15 -0700157static void dm9000_rx(struct net_device *);
158static void dm9000_hash_table(struct net_device *);
159
Sascha Hauera1365272005-05-05 15:14:15 -0700160/* DM9000 network board routine ---------------------------- */
161
162static void
163dm9000_reset(board_info_t * db)
164{
Ben Dooksa76836f2008-02-05 00:02:02 +0000165 dev_dbg(db->dev, "resetting device\n");
166
Sascha Hauera1365272005-05-05 15:14:15 -0700167 /* RESET device */
168 writeb(DM9000_NCR, db->io_addr);
169 udelay(200);
170 writeb(NCR_RST, db->io_data);
171 udelay(200);
172}
173
174/*
175 * Read a byte from I/O port
176 */
177static u8
178ior(board_info_t * db, int reg)
179{
180 writeb(reg, db->io_addr);
181 return readb(db->io_data);
182}
183
184/*
185 * Write a byte to I/O port
186 */
187
188static void
189iow(board_info_t * db, int reg, int value)
190{
191 writeb(reg, db->io_addr);
192 writeb(value, db->io_data);
193}
194
195/* routines for sending block to chip */
196
197static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
198{
199 writesb(reg, data, count);
200}
201
202static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
203{
204 writesw(reg, data, (count+1) >> 1);
205}
206
207static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
208{
209 writesl(reg, data, (count+3) >> 2);
210}
211
212/* input block from chip to memory */
213
214static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
215{
Sascha Hauer5f6b5512005-06-20 15:32:51 -0700216 readsb(reg, data, count);
Sascha Hauera1365272005-05-05 15:14:15 -0700217}
218
219
220static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
221{
222 readsw(reg, data, (count+1) >> 1);
223}
224
225static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
226{
227 readsl(reg, data, (count+3) >> 2);
228}
229
230/* dump block from chip to null */
231
232static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
233{
234 int i;
235 int tmp;
236
237 for (i = 0; i < count; i++)
238 tmp = readb(reg);
239}
240
241static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
242{
243 int i;
244 int tmp;
245
246 count = (count + 1) >> 1;
247
248 for (i = 0; i < count; i++)
249 tmp = readw(reg);
250}
251
252static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
253{
254 int i;
255 int tmp;
256
257 count = (count + 3) >> 2;
258
259 for (i = 0; i < count; i++)
260 tmp = readl(reg);
261}
262
263/* dm9000_set_io
264 *
265 * select the specified set of io routines to use with the
266 * device
267 */
268
269static void dm9000_set_io(struct board_info *db, int byte_width)
270{
271 /* use the size of the data resource to work out what IO
272 * routines we want to use
273 */
274
275 switch (byte_width) {
276 case 1:
277 db->dumpblk = dm9000_dumpblk_8bit;
278 db->outblk = dm9000_outblk_8bit;
279 db->inblk = dm9000_inblk_8bit;
280 break;
281
Sascha Hauera1365272005-05-05 15:14:15 -0700282
283 case 3:
Ben Dooksa76836f2008-02-05 00:02:02 +0000284 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
285 case 2:
Sascha Hauera1365272005-05-05 15:14:15 -0700286 db->dumpblk = dm9000_dumpblk_16bit;
287 db->outblk = dm9000_outblk_16bit;
288 db->inblk = dm9000_inblk_16bit;
289 break;
290
291 case 4:
292 default:
293 db->dumpblk = dm9000_dumpblk_32bit;
294 db->outblk = dm9000_outblk_32bit;
295 db->inblk = dm9000_inblk_32bit;
296 break;
297 }
298}
299
300
301/* Our watchdog timed out. Called by the networking layer */
302static void dm9000_timeout(struct net_device *dev)
303{
304 board_info_t *db = (board_info_t *) dev->priv;
305 u8 reg_save;
306 unsigned long flags;
307
308 /* Save previous register address */
309 reg_save = readb(db->io_addr);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100310 spin_lock_irqsave(&db->lock,flags);
Sascha Hauera1365272005-05-05 15:14:15 -0700311
312 netif_stop_queue(dev);
313 dm9000_reset(db);
314 dm9000_init_dm9000(dev);
315 /* We can accept TX packets again */
316 dev->trans_start = jiffies;
317 netif_wake_queue(dev);
318
319 /* Restore previous register address */
320 writeb(reg_save, db->io_addr);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100321 spin_unlock_irqrestore(&db->lock,flags);
Sascha Hauera1365272005-05-05 15:14:15 -0700322}
323
Kevin Hao2fd0e332006-08-14 23:00:15 -0700324#ifdef CONFIG_NET_POLL_CONTROLLER
325/*
326 *Used by netconsole
327 */
328static void dm9000_poll_controller(struct net_device *dev)
329{
330 disable_irq(dev->irq);
Al Viro28431142006-10-08 15:00:12 +0100331 dm9000_interrupt(dev->irq,dev);
Kevin Hao2fd0e332006-08-14 23:00:15 -0700332 enable_irq(dev->irq);
333}
334#endif
Sascha Hauera1365272005-05-05 15:14:15 -0700335
Ben Dooksf42d8ae2008-02-05 00:02:21 +0000336static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
337{
338 board_info_t *dm = to_dm9000_board(dev);
339
340 if (!netif_running(dev))
341 return -EINVAL;
342
343 return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
344}
345
Ben Dooks7da99852008-02-05 00:02:06 +0000346/* ethtool ops */
347
348static void dm9000_get_drvinfo(struct net_device *dev,
349 struct ethtool_drvinfo *info)
350{
351 board_info_t *dm = to_dm9000_board(dev);
352
353 strcpy(info->driver, CARDNAME);
354 strcpy(info->version, DRV_VERSION);
355 strcpy(info->bus_info, to_platform_device(dm->dev)->name);
356}
357
Ben Dookse662ee02008-02-05 00:02:12 +0000358static u32 dm9000_get_msglevel(struct net_device *dev)
359{
360 board_info_t *dm = to_dm9000_board(dev);
361
362 return dm->msg_enable;
363}
364
365static void dm9000_set_msglevel(struct net_device *dev, u32 value)
366{
367 board_info_t *dm = to_dm9000_board(dev);
368
369 dm->msg_enable = value;
370}
371
Ben Dooks7da99852008-02-05 00:02:06 +0000372static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
373{
374 board_info_t *dm = to_dm9000_board(dev);
Ben Dooks7da99852008-02-05 00:02:06 +0000375
Ben Dooks7da99852008-02-05 00:02:06 +0000376 mii_ethtool_gset(&dm->mii, cmd);
Ben Dooks7da99852008-02-05 00:02:06 +0000377 return 0;
378}
379
380static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
381{
382 board_info_t *dm = to_dm9000_board(dev);
Ben Dooks7da99852008-02-05 00:02:06 +0000383
Ben Dooks9a2f0372008-02-05 00:02:10 +0000384 return mii_ethtool_sset(&dm->mii, cmd);
Ben Dooks7da99852008-02-05 00:02:06 +0000385}
386
387static int dm9000_nway_reset(struct net_device *dev)
388{
389 board_info_t *dm = to_dm9000_board(dev);
390 return mii_nway_restart(&dm->mii);
391}
392
393static u32 dm9000_get_link(struct net_device *dev)
394{
395 board_info_t *dm = to_dm9000_board(dev);
396 return mii_link_ok(&dm->mii);
397}
398
Ben Dooks29d52e52008-02-05 00:02:11 +0000399#define DM_EEPROM_MAGIC (0x444D394B)
400
401static int dm9000_get_eeprom_len(struct net_device *dev)
402{
403 return 128;
404}
405
406static int dm9000_get_eeprom(struct net_device *dev,
407 struct ethtool_eeprom *ee, u8 *data)
408{
409 board_info_t *dm = to_dm9000_board(dev);
410 int offset = ee->offset;
411 int len = ee->len;
412 int i;
413
414 /* EEPROM access is aligned to two bytes */
415
416 if ((len & 1) != 0 || (offset & 1) != 0)
417 return -EINVAL;
418
Ben Dooksbb44fb702008-02-05 00:02:20 +0000419 if (dm->flags & DM9000_PLATF_NO_EEPROM)
420 return -ENOENT;
421
Ben Dooks29d52e52008-02-05 00:02:11 +0000422 ee->magic = DM_EEPROM_MAGIC;
423
424 for (i = 0; i < len; i += 2)
425 dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
426
427 return 0;
428}
429
430static int dm9000_set_eeprom(struct net_device *dev,
431 struct ethtool_eeprom *ee, u8 *data)
432{
433 board_info_t *dm = to_dm9000_board(dev);
434 int offset = ee->offset;
435 int len = ee->len;
436 int i;
437
438 /* EEPROM access is aligned to two bytes */
439
440 if ((len & 1) != 0 || (offset & 1) != 0)
441 return -EINVAL;
442
Ben Dooksbb44fb702008-02-05 00:02:20 +0000443 if (dm->flags & DM9000_PLATF_NO_EEPROM)
444 return -ENOENT;
445
Ben Dooks29d52e52008-02-05 00:02:11 +0000446 if (ee->magic != DM_EEPROM_MAGIC)
447 return -EINVAL;
448
449 for (i = 0; i < len; i += 2)
450 dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
451
452 return 0;
453}
454
Ben Dooks7da99852008-02-05 00:02:06 +0000455static const struct ethtool_ops dm9000_ethtool_ops = {
456 .get_drvinfo = dm9000_get_drvinfo,
457 .get_settings = dm9000_get_settings,
458 .set_settings = dm9000_set_settings,
Ben Dookse662ee02008-02-05 00:02:12 +0000459 .get_msglevel = dm9000_get_msglevel,
460 .set_msglevel = dm9000_set_msglevel,
Ben Dooks7da99852008-02-05 00:02:06 +0000461 .nway_reset = dm9000_nway_reset,
462 .get_link = dm9000_get_link,
Ben Dooks29d52e52008-02-05 00:02:11 +0000463 .get_eeprom_len = dm9000_get_eeprom_len,
464 .get_eeprom = dm9000_get_eeprom,
465 .set_eeprom = dm9000_set_eeprom,
Ben Dooks7da99852008-02-05 00:02:06 +0000466};
467
468
Sascha Hauera1365272005-05-05 15:14:15 -0700469/* dm9000_release_board
470 *
471 * release a board, and any mapped resources
472 */
473
474static void
475dm9000_release_board(struct platform_device *pdev, struct board_info *db)
476{
477 if (db->data_res == NULL) {
478 if (db->addr_res != NULL)
479 release_mem_region((unsigned long)db->io_addr, 4);
480 return;
481 }
482
483 /* unmap our resources */
484
485 iounmap(db->io_addr);
486 iounmap(db->io_data);
487
488 /* release the resources */
489
490 if (db->data_req != NULL) {
491 release_resource(db->data_req);
492 kfree(db->data_req);
493 }
494
Dirk Opfer51985482006-09-06 19:53:32 +0200495 if (db->addr_req != NULL) {
496 release_resource(db->addr_req);
Sascha Hauera1365272005-05-05 15:14:15 -0700497 kfree(db->addr_req);
498 }
499}
500
501#define res_size(_r) (((_r)->end - (_r)->start) + 1)
502
503/*
504 * Search DM9000 board, allocate space and register it
505 */
506static int
Russell King3ae5eae2005-11-09 22:32:44 +0000507dm9000_probe(struct platform_device *pdev)
Sascha Hauera1365272005-05-05 15:14:15 -0700508{
Sascha Hauera1365272005-05-05 15:14:15 -0700509 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
510 struct board_info *db; /* Point a board information structure */
511 struct net_device *ndev;
Ben Dooks179c7432008-02-05 00:02:23 +0000512 const unsigned char *mac_src;
Sascha Hauera1365272005-05-05 15:14:15 -0700513 unsigned long base;
514 int ret = 0;
515 int iosize;
516 int i;
517 u32 id_val;
518
Sascha Hauera1365272005-05-05 15:14:15 -0700519 /* Init network device */
520 ndev = alloc_etherdev(sizeof (struct board_info));
521 if (!ndev) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000522 dev_err(&pdev->dev, "could not allocate device.\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700523 return -ENOMEM;
524 }
525
Russell King3ae5eae2005-11-09 22:32:44 +0000526 SET_NETDEV_DEV(ndev, &pdev->dev);
Sascha Hauera1365272005-05-05 15:14:15 -0700527
Ben Dooksa76836f2008-02-05 00:02:02 +0000528 dev_dbg(&pdev->dev, "dm9000_probe()");
Sascha Hauera1365272005-05-05 15:14:15 -0700529
530 /* setup board info structure */
531 db = (struct board_info *) ndev->priv;
532 memset(db, 0, sizeof (*db));
533
Ben Dooksa76836f2008-02-05 00:02:02 +0000534 db->dev = &pdev->dev;
535
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100536 spin_lock_init(&db->lock);
Ben Dooks9a2f0372008-02-05 00:02:10 +0000537 mutex_init(&db->addr_lock);
Ben Dooks9ef9ac52005-07-23 17:25:18 +0100538
Sascha Hauera1365272005-05-05 15:14:15 -0700539 if (pdev->num_resources < 2) {
540 ret = -ENODEV;
541 goto out;
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100542 } else if (pdev->num_resources == 2) {
Sascha Hauera1365272005-05-05 15:14:15 -0700543 base = pdev->resource[0].start;
544
545 if (!request_mem_region(base, 4, ndev->name)) {
546 ret = -EBUSY;
547 goto out;
548 }
549
550 ndev->base_addr = base;
551 ndev->irq = pdev->resource[1].start;
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100552 db->io_addr = (void __iomem *)base;
553 db->io_data = (void __iomem *)(base + 4);
Sascha Hauera1365272005-05-05 15:14:15 -0700554
Alex Landauf40d24d2007-07-12 12:11:48 +0800555 /* ensure at least we have a default set of IO routines */
556 dm9000_set_io(db, 2);
557
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100558 } else {
Sascha Hauera1365272005-05-05 15:14:15 -0700559 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
560 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
561 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
562
Ben Dooksb4ed03f2006-06-13 23:47:19 +0100563 if (db->addr_res == NULL || db->data_res == NULL ||
564 db->irq_res == NULL) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000565 dev_err(db->dev, "insufficient resources\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700566 ret = -ENOENT;
567 goto out;
568 }
569
570 i = res_size(db->addr_res);
571 db->addr_req = request_mem_region(db->addr_res->start, i,
572 pdev->name);
573
574 if (db->addr_req == NULL) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000575 dev_err(db->dev, "cannot claim address reg area\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700576 ret = -EIO;
577 goto out;
578 }
579
580 db->io_addr = ioremap(db->addr_res->start, i);
581
582 if (db->io_addr == NULL) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000583 dev_err(db->dev, "failed to ioremap address reg\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700584 ret = -EINVAL;
585 goto out;
586 }
587
588 iosize = res_size(db->data_res);
589 db->data_req = request_mem_region(db->data_res->start, iosize,
590 pdev->name);
591
592 if (db->data_req == NULL) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000593 dev_err(db->dev, "cannot claim data reg area\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700594 ret = -EIO;
595 goto out;
596 }
597
598 db->io_data = ioremap(db->data_res->start, iosize);
599
600 if (db->io_data == NULL) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000601 dev_err(db->dev,"failed to ioremap data reg\n");
Sascha Hauera1365272005-05-05 15:14:15 -0700602 ret = -EINVAL;
603 goto out;
604 }
605
606 /* fill in parameters for net-dev structure */
607
608 ndev->base_addr = (unsigned long)db->io_addr;
609 ndev->irq = db->irq_res->start;
610
611 /* ensure at least we have a default set of IO routines */
612 dm9000_set_io(db, iosize);
Sascha Hauera1365272005-05-05 15:14:15 -0700613 }
614
615 /* check to see if anything is being over-ridden */
616 if (pdata != NULL) {
617 /* check to see if the driver wants to over-ride the
618 * default IO width */
619
620 if (pdata->flags & DM9000_PLATF_8BITONLY)
621 dm9000_set_io(db, 1);
622
623 if (pdata->flags & DM9000_PLATF_16BITONLY)
624 dm9000_set_io(db, 2);
625
626 if (pdata->flags & DM9000_PLATF_32BITONLY)
627 dm9000_set_io(db, 4);
628
629 /* check to see if there are any IO routine
630 * over-rides */
631
632 if (pdata->inblk != NULL)
633 db->inblk = pdata->inblk;
634
635 if (pdata->outblk != NULL)
636 db->outblk = pdata->outblk;
637
638 if (pdata->dumpblk != NULL)
639 db->dumpblk = pdata->dumpblk;
Ben Dooks33ba5092008-02-05 00:02:01 +0000640
641 db->flags = pdata->flags;
Sascha Hauera1365272005-05-05 15:14:15 -0700642 }
643
644 dm9000_reset(db);
645
646 /* try two times, DM9000 sometimes gets the first read wrong */
Ben Dooks513b6be2008-02-05 00:02:22 +0000647 for (i = 0; i < 8; i++) {
Sascha Hauera1365272005-05-05 15:14:15 -0700648 id_val = ior(db, DM9000_VIDL);
649 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
650 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
651 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
652
653 if (id_val == DM9000_ID)
654 break;
Ben Dooksa76836f2008-02-05 00:02:02 +0000655 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
Sascha Hauera1365272005-05-05 15:14:15 -0700656 }
657
658 if (id_val != DM9000_ID) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000659 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
Mike Rapoport418d6f82007-10-18 09:23:11 +0200660 ret = -ENODEV;
661 goto out;
Sascha Hauera1365272005-05-05 15:14:15 -0700662 }
663
664 /* from this point we assume that we have found a DM9000 */
665
666 /* driver system function */
667 ether_setup(ndev);
668
669 ndev->open = &dm9000_open;
670 ndev->hard_start_xmit = &dm9000_start_xmit;
671 ndev->tx_timeout = &dm9000_timeout;
672 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
673 ndev->stop = &dm9000_stop;
Sascha Hauera1365272005-05-05 15:14:15 -0700674 ndev->set_multicast_list = &dm9000_hash_table;
Ben Dooks7da99852008-02-05 00:02:06 +0000675 ndev->ethtool_ops = &dm9000_ethtool_ops;
Ben Dooksf42d8ae2008-02-05 00:02:21 +0000676 ndev->do_ioctl = &dm9000_ioctl;
Ben Dooks7da99852008-02-05 00:02:06 +0000677
Kevin Hao2fd0e332006-08-14 23:00:15 -0700678#ifdef CONFIG_NET_POLL_CONTROLLER
679 ndev->poll_controller = &dm9000_poll_controller;
680#endif
Sascha Hauera1365272005-05-05 15:14:15 -0700681
Sascha Hauera1365272005-05-05 15:14:15 -0700682 db->msg_enable = NETIF_MSG_LINK;
683 db->mii.phy_id_mask = 0x1f;
684 db->mii.reg_num_mask = 0x1f;
685 db->mii.force_media = 0;
686 db->mii.full_duplex = 0;
687 db->mii.dev = ndev;
688 db->mii.mdio_read = dm9000_phy_read;
689 db->mii.mdio_write = dm9000_phy_write;
690
Ben Dooks179c7432008-02-05 00:02:23 +0000691 mac_src = "eeprom";
692
Ben Dooks86c62fa2008-02-05 00:02:09 +0000693 /* try reading the node address from the attached EEPROM */
694 for (i = 0; i < 6; i += 2)
695 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
Sascha Hauera1365272005-05-05 15:14:15 -0700696
Ben Dooks5b55dda2006-06-13 23:50:15 +0100697 if (!is_valid_ether_addr(ndev->dev_addr)) {
698 /* try reading from mac */
Ben Dooks179c7432008-02-05 00:02:23 +0000699
700 mac_src = "chip";
Ben Dooks5b55dda2006-06-13 23:50:15 +0100701 for (i = 0; i < 6; i++)
702 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
703 }
704
Sascha Hauera1365272005-05-05 15:14:15 -0700705 if (!is_valid_ether_addr(ndev->dev_addr))
Ben Dooksa76836f2008-02-05 00:02:02 +0000706 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
707 "set using ifconfig\n", ndev->name);
Sascha Hauera1365272005-05-05 15:14:15 -0700708
Russell King3ae5eae2005-11-09 22:32:44 +0000709 platform_set_drvdata(pdev, ndev);
Sascha Hauera1365272005-05-05 15:14:15 -0700710 ret = register_netdev(ndev);
711
712 if (ret == 0) {
Joe Perches0795af52007-10-03 17:59:30 -0700713 DECLARE_MAC_BUF(mac);
Ben Dooks179c7432008-02-05 00:02:23 +0000714 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s (%s)\n",
Joe Perches0795af52007-10-03 17:59:30 -0700715 ndev->name, db->io_addr, db->io_data, ndev->irq,
Ben Dooks179c7432008-02-05 00:02:23 +0000716 print_mac(mac, ndev->dev_addr), mac_src);
Sascha Hauera1365272005-05-05 15:14:15 -0700717 }
718 return 0;
719
Mike Rapoport418d6f82007-10-18 09:23:11 +0200720out:
Ben Dooksa76836f2008-02-05 00:02:02 +0000721 dev_err(db->dev, "not found (%d).\n", ret);
Sascha Hauera1365272005-05-05 15:14:15 -0700722
723 dm9000_release_board(pdev, db);
Ben Dooks9fd9f9b2007-05-07 11:13:25 +0000724 free_netdev(ndev);
Sascha Hauera1365272005-05-05 15:14:15 -0700725
726 return ret;
727}
728
729/*
730 * Open the interface.
731 * The interface is opened whenever "ifconfig" actives it.
732 */
733static int
734dm9000_open(struct net_device *dev)
735{
736 board_info_t *db = (board_info_t *) dev->priv;
Ben Dooks1a5f1c42008-02-05 00:02:04 +0000737 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
Sascha Hauera1365272005-05-05 15:14:15 -0700738
Ben Dooksc991d162008-02-05 00:02:16 +0000739 if (netif_msg_ifup(db))
740 dev_dbg(db->dev, "enabling %s\n", dev->name);
Sascha Hauera1365272005-05-05 15:14:15 -0700741
Ben Dooks1a5f1c42008-02-05 00:02:04 +0000742 /* If there is no IRQ type specified, default to something that
743 * may work, and tell the user that this is a problem */
744
745 if (irqflags == IRQF_TRIGGER_NONE) {
746 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
747 irqflags = DEFAULT_TRIGGER;
748 }
749
750 irqflags |= IRQF_SHARED;
751
752 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
Sascha Hauera1365272005-05-05 15:14:15 -0700753 return -EAGAIN;
754
755 /* Initialize DM9000 board */
756 dm9000_reset(db);
757 dm9000_init_dm9000(dev);
758
759 /* Init driver variable */
760 db->dbug_cnt = 0;
761
Sascha Hauera1365272005-05-05 15:14:15 -0700762 mii_check_media(&db->mii, netif_msg_link(db), 1);
763 netif_start_queue(dev);
764
765 return 0;
766}
767
768/*
769 * Initilize dm9000 board
770 */
771static void
772dm9000_init_dm9000(struct net_device *dev)
773{
774 board_info_t *db = (board_info_t *) dev->priv;
775
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000776 dm9000_dbg(db, 1, "entering %s\n", __func__);
Sascha Hauera1365272005-05-05 15:14:15 -0700777
778 /* I/O mode */
779 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
780
781 /* GPIO0 on pre-activate PHY */
782 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
783 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
784 iow(db, DM9000_GPR, 0); /* Enable PHY */
785
Ben Dooks33ba5092008-02-05 00:02:01 +0000786 if (db->flags & DM9000_PLATF_EXT_PHY)
787 iow(db, DM9000_NCR, NCR_EXT_PHY);
788
Sascha Hauera1365272005-05-05 15:14:15 -0700789 /* Program operating register */
790 iow(db, DM9000_TCR, 0); /* TX Polling clear */
791 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
792 iow(db, DM9000_FCR, 0xff); /* Flow Control */
793 iow(db, DM9000_SMCR, 0); /* Special Mode */
794 /* clear TX status */
795 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
796 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
797
798 /* Set address filter table */
799 dm9000_hash_table(dev);
800
Sascha Hauera1365272005-05-05 15:14:15 -0700801 /* Enable TX/RX interrupt mask */
802 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
803
804 /* Init Driver variable */
805 db->tx_pkt_cnt = 0;
806 db->queue_pkt_len = 0;
807 dev->trans_start = 0;
Sascha Hauera1365272005-05-05 15:14:15 -0700808}
809
810/*
811 * Hardware start transmission.
812 * Send a packet to media from the upper layer.
813 */
814static int
815dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
816{
Florian Westphalc46ac942007-08-21 01:33:42 +0200817 unsigned long flags;
Sascha Hauera1365272005-05-05 15:14:15 -0700818 board_info_t *db = (board_info_t *) dev->priv;
819
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000820 dm9000_dbg(db, 3, "%s:\n", __func__);
Sascha Hauera1365272005-05-05 15:14:15 -0700821
822 if (db->tx_pkt_cnt > 1)
823 return 1;
824
Florian Westphalc46ac942007-08-21 01:33:42 +0200825 spin_lock_irqsave(&db->lock, flags);
Sascha Hauera1365272005-05-05 15:14:15 -0700826
827 /* Move data to DM9000 TX RAM */
828 writeb(DM9000_MWCMD, db->io_addr);
829
830 (db->outblk)(db->io_data, skb->data, skb->len);
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700831 dev->stats.tx_bytes += skb->len;
Sascha Hauera1365272005-05-05 15:14:15 -0700832
Florian Westphalc46ac942007-08-21 01:33:42 +0200833 db->tx_pkt_cnt++;
Sascha Hauera1365272005-05-05 15:14:15 -0700834 /* TX control: First packet immediately send, second packet queue */
Florian Westphalc46ac942007-08-21 01:33:42 +0200835 if (db->tx_pkt_cnt == 1) {
Sascha Hauera1365272005-05-05 15:14:15 -0700836 /* Set TX length to DM9000 */
Ben Dooks073d3f42008-02-05 00:02:19 +0000837 iow(db, DM9000_TXPLL, skb->len);
838 iow(db, DM9000_TXPLH, skb->len >> 8);
Sascha Hauera1365272005-05-05 15:14:15 -0700839
840 /* Issue TX polling command */
841 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
842
843 dev->trans_start = jiffies; /* save the time stamp */
Sascha Hauera1365272005-05-05 15:14:15 -0700844 } else {
845 /* Second packet */
Sascha Hauera1365272005-05-05 15:14:15 -0700846 db->queue_pkt_len = skb->len;
Florian Westphalc46ac942007-08-21 01:33:42 +0200847 netif_stop_queue(dev);
Sascha Hauera1365272005-05-05 15:14:15 -0700848 }
849
Florian Westphalc46ac942007-08-21 01:33:42 +0200850 spin_unlock_irqrestore(&db->lock, flags);
851
Sascha Hauera1365272005-05-05 15:14:15 -0700852 /* free this SKB */
853 dev_kfree_skb(skb);
854
Sascha Hauera1365272005-05-05 15:14:15 -0700855 return 0;
856}
857
858static void
859dm9000_shutdown(struct net_device *dev)
860{
861 board_info_t *db = (board_info_t *) dev->priv;
862
863 /* RESET device */
864 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
865 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
866 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
867 iow(db, DM9000_RCR, 0x00); /* Disable RX */
868}
869
870/*
871 * Stop the interface.
872 * The interface is stopped when it is brought.
873 */
874static int
875dm9000_stop(struct net_device *ndev)
876{
877 board_info_t *db = (board_info_t *) ndev->priv;
878
Ben Dooksc991d162008-02-05 00:02:16 +0000879 if (netif_msg_ifdown(db))
880 dev_dbg(db->dev, "shutting down %s\n", ndev->name);
Sascha Hauera1365272005-05-05 15:14:15 -0700881
Sascha Hauera1365272005-05-05 15:14:15 -0700882 netif_stop_queue(ndev);
883 netif_carrier_off(ndev);
884
885 /* free interrupt */
886 free_irq(ndev->irq, ndev);
887
888 dm9000_shutdown(ndev);
889
890 return 0;
891}
892
893/*
894 * DM9000 interrupt handler
895 * receive the packet to upper layer, free the transmitted packet
896 */
897
Ben Dooks5d22a312006-06-14 00:09:17 +0100898static void
Sascha Hauera1365272005-05-05 15:14:15 -0700899dm9000_tx_done(struct net_device *dev, board_info_t * db)
900{
901 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
902
903 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
904 /* One packet sent complete */
905 db->tx_pkt_cnt--;
Jeff Garzik09f75cd2007-10-03 17:41:50 -0700906 dev->stats.tx_packets++;
Sascha Hauera1365272005-05-05 15:14:15 -0700907
Ben Dooksc991d162008-02-05 00:02:16 +0000908 if (netif_msg_tx_done(db))
909 dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);
910
Sascha Hauera1365272005-05-05 15:14:15 -0700911 /* Queue packet check & send */
912 if (db->tx_pkt_cnt > 0) {
Ben Dooks073d3f42008-02-05 00:02:19 +0000913 iow(db, DM9000_TXPLL, db->queue_pkt_len);
914 iow(db, DM9000_TXPLH, db->queue_pkt_len >> 8);
Sascha Hauera1365272005-05-05 15:14:15 -0700915 iow(db, DM9000_TCR, TCR_TXREQ);
916 dev->trans_start = jiffies;
917 }
918 netif_wake_queue(dev);
919 }
920}
921
922static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +0100923dm9000_interrupt(int irq, void *dev_id)
Sascha Hauera1365272005-05-05 15:14:15 -0700924{
925 struct net_device *dev = dev_id;
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000926 board_info_t *db = (board_info_t *) dev->priv;
Sascha Hauera1365272005-05-05 15:14:15 -0700927 int int_status;
928 u8 reg_save;
929
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000930 dm9000_dbg(db, 3, "entering %s\n", __func__);
Sascha Hauera1365272005-05-05 15:14:15 -0700931
932 /* A real interrupt coming */
Ben Dooks5b2b4ff2008-02-05 00:02:03 +0000933
Sascha Hauera1365272005-05-05 15:14:15 -0700934 spin_lock(&db->lock);
935
936 /* Save previous register address */
937 reg_save = readb(db->io_addr);
938
939 /* Disable all interrupts */
940 iow(db, DM9000_IMR, IMR_PAR);
941
942 /* Got DM9000 interrupt status */
943 int_status = ior(db, DM9000_ISR); /* Got ISR */
944 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
945
Ben Dooksc991d162008-02-05 00:02:16 +0000946 if (netif_msg_intr(db))
947 dev_dbg(db->dev, "interrupt status %02x\n", int_status);
948
Sascha Hauera1365272005-05-05 15:14:15 -0700949 /* Received the coming packet */
950 if (int_status & ISR_PRS)
951 dm9000_rx(dev);
952
953 /* Trnasmit Interrupt check */
954 if (int_status & ISR_PTS)
955 dm9000_tx_done(dev, db);
956
957 /* Re-enable interrupt mask */
958 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
959
960 /* Restore previous register address */
961 writeb(reg_save, db->io_addr);
962
963 spin_unlock(&db->lock);
964
965 return IRQ_HANDLED;
966}
967
Sascha Hauera1365272005-05-05 15:14:15 -0700968struct dm9000_rxhdr {
Ben Dooks93116572008-02-05 00:02:00 +0000969 u8 RxPktReady;
970 u8 RxStatus;
Al Viro8b9fc8a2008-03-29 03:11:08 +0000971 __le16 RxLen;
Sascha Hauera1365272005-05-05 15:14:15 -0700972} __attribute__((__packed__));
973
974/*
975 * Received a packet and pass to upper layer
976 */
977static void
978dm9000_rx(struct net_device *dev)
979{
980 board_info_t *db = (board_info_t *) dev->priv;
981 struct dm9000_rxhdr rxhdr;
982 struct sk_buff *skb;
983 u8 rxbyte, *rdptr;
Richard Knutsson6478fac2007-05-01 18:43:27 +0200984 bool GoodPacket;
Sascha Hauera1365272005-05-05 15:14:15 -0700985 int RxLen;
986
987 /* Check packet ready or not */
988 do {
989 ior(db, DM9000_MRCMDX); /* Dummy read */
990
991 /* Get most updated data */
992 rxbyte = readb(db->io_data);
993
994 /* Status check: this byte must be 0 or 1 */
995 if (rxbyte > DM9000_PKT_RDY) {
Ben Dooksa76836f2008-02-05 00:02:02 +0000996 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
Sascha Hauera1365272005-05-05 15:14:15 -0700997 iow(db, DM9000_RCR, 0x00); /* Stop Device */
998 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
999 return;
1000 }
1001
1002 if (rxbyte != DM9000_PKT_RDY)
1003 return;
1004
1005 /* A packet ready now & Get status/length */
Richard Knutsson6478fac2007-05-01 18:43:27 +02001006 GoodPacket = true;
Sascha Hauera1365272005-05-05 15:14:15 -07001007 writeb(DM9000_MRCMD, db->io_addr);
1008
1009 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
1010
Ben Dooks93116572008-02-05 00:02:00 +00001011 RxLen = le16_to_cpu(rxhdr.RxLen);
Sascha Hauera1365272005-05-05 15:14:15 -07001012
Ben Dooksc991d162008-02-05 00:02:16 +00001013 if (netif_msg_rx_status(db))
1014 dev_dbg(db->dev, "RX: status %02x, length %04x\n",
1015 rxhdr.RxStatus, RxLen);
1016
Sascha Hauera1365272005-05-05 15:14:15 -07001017 /* Packet Status check */
1018 if (RxLen < 0x40) {
Richard Knutsson6478fac2007-05-01 18:43:27 +02001019 GoodPacket = false;
Ben Dooksc991d162008-02-05 00:02:16 +00001020 if (netif_msg_rx_err(db))
1021 dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
Sascha Hauera1365272005-05-05 15:14:15 -07001022 }
1023
1024 if (RxLen > DM9000_PKT_MAX) {
Ben Dooksa76836f2008-02-05 00:02:02 +00001025 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
Sascha Hauera1365272005-05-05 15:14:15 -07001026 }
1027
Ben Dooks93116572008-02-05 00:02:00 +00001028 if (rxhdr.RxStatus & 0xbf) {
Richard Knutsson6478fac2007-05-01 18:43:27 +02001029 GoodPacket = false;
Ben Dooks93116572008-02-05 00:02:00 +00001030 if (rxhdr.RxStatus & 0x01) {
Ben Dooksc991d162008-02-05 00:02:16 +00001031 if (netif_msg_rx_err(db))
1032 dev_dbg(db->dev, "fifo error\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001033 dev->stats.rx_fifo_errors++;
Sascha Hauera1365272005-05-05 15:14:15 -07001034 }
Ben Dooks93116572008-02-05 00:02:00 +00001035 if (rxhdr.RxStatus & 0x02) {
Ben Dooksc991d162008-02-05 00:02:16 +00001036 if (netif_msg_rx_err(db))
1037 dev_dbg(db->dev, "crc error\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001038 dev->stats.rx_crc_errors++;
Sascha Hauera1365272005-05-05 15:14:15 -07001039 }
Ben Dooks93116572008-02-05 00:02:00 +00001040 if (rxhdr.RxStatus & 0x80) {
Ben Dooksc991d162008-02-05 00:02:16 +00001041 if (netif_msg_rx_err(db))
1042 dev_dbg(db->dev, "length error\n");
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001043 dev->stats.rx_length_errors++;
Sascha Hauera1365272005-05-05 15:14:15 -07001044 }
1045 }
1046
1047 /* Move data from DM9000 */
1048 if (GoodPacket
1049 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
Sascha Hauera1365272005-05-05 15:14:15 -07001050 skb_reserve(skb, 2);
1051 rdptr = (u8 *) skb_put(skb, RxLen - 4);
1052
1053 /* Read received packet from RX SRAM */
1054
1055 (db->inblk)(db->io_data, rdptr, RxLen);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001056 dev->stats.rx_bytes += RxLen;
Sascha Hauera1365272005-05-05 15:14:15 -07001057
1058 /* Pass to upper layer */
1059 skb->protocol = eth_type_trans(skb, dev);
1060 netif_rx(skb);
Jeff Garzik09f75cd2007-10-03 17:41:50 -07001061 dev->stats.rx_packets++;
Sascha Hauera1365272005-05-05 15:14:15 -07001062
1063 } else {
1064 /* need to dump the packet's data */
1065
1066 (db->dumpblk)(db->io_data, RxLen);
1067 }
1068 } while (rxbyte == DM9000_PKT_RDY);
1069}
1070
Ben Dooks39c341a2008-02-05 00:02:17 +00001071static unsigned int
1072dm9000_read_locked(board_info_t *db, int reg)
1073{
1074 unsigned long flags;
1075 unsigned int ret;
1076
1077 spin_lock_irqsave(&db->lock, flags);
1078 ret = ior(db, reg);
1079 spin_unlock_irqrestore(&db->lock, flags);
1080
1081 return ret;
1082}
1083
1084static int dm9000_wait_eeprom(board_info_t *db)
1085{
1086 unsigned int status;
1087 int timeout = 8; /* wait max 8msec */
1088
1089 /* The DM9000 data sheets say we should be able to
1090 * poll the ERRE bit in EPCR to wait for the EEPROM
1091 * operation. From testing several chips, this bit
1092 * does not seem to work.
1093 *
1094 * We attempt to use the bit, but fall back to the
1095 * timeout (which is why we do not return an error
1096 * on expiry) to say that the EEPROM operation has
1097 * completed.
1098 */
1099
1100 while (1) {
1101 status = dm9000_read_locked(db, DM9000_EPCR);
1102
1103 if ((status & EPCR_ERRE) == 0)
1104 break;
1105
1106 if (timeout-- < 0) {
1107 dev_dbg(db->dev, "timeout waiting EEPROM\n");
1108 break;
1109 }
1110 }
1111
1112 return 0;
1113}
1114
Sascha Hauera1365272005-05-05 15:14:15 -07001115/*
Ben Dooks86c62fa2008-02-05 00:02:09 +00001116 * Read a word data from EEPROM
Sascha Hauera1365272005-05-05 15:14:15 -07001117 */
Ben Dooks86c62fa2008-02-05 00:02:09 +00001118static void
Ben Dooks29d52e52008-02-05 00:02:11 +00001119dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
Sascha Hauera1365272005-05-05 15:14:15 -07001120{
Ben Dooks621ddcb2008-02-05 00:02:14 +00001121 unsigned long flags;
1122
Ben Dooksbb44fb702008-02-05 00:02:20 +00001123 if (db->flags & DM9000_PLATF_NO_EEPROM) {
1124 to[0] = 0xff;
1125 to[1] = 0xff;
1126 return;
1127 }
1128
Ben Dooks9a2f0372008-02-05 00:02:10 +00001129 mutex_lock(&db->addr_lock);
1130
Ben Dooks621ddcb2008-02-05 00:02:14 +00001131 spin_lock_irqsave(&db->lock, flags);
1132
Sascha Hauera1365272005-05-05 15:14:15 -07001133 iow(db, DM9000_EPAR, offset);
1134 iow(db, DM9000_EPCR, EPCR_ERPRR);
Ben Dooks621ddcb2008-02-05 00:02:14 +00001135
1136 spin_unlock_irqrestore(&db->lock, flags);
1137
Ben Dooks39c341a2008-02-05 00:02:17 +00001138 dm9000_wait_eeprom(db);
1139
1140 /* delay for at-least 150uS */
1141 msleep(1);
Ben Dooks621ddcb2008-02-05 00:02:14 +00001142
1143 spin_lock_irqsave(&db->lock, flags);
1144
Sascha Hauera1365272005-05-05 15:14:15 -07001145 iow(db, DM9000_EPCR, 0x0);
Ben Dooks86c62fa2008-02-05 00:02:09 +00001146
1147 to[0] = ior(db, DM9000_EPDRL);
1148 to[1] = ior(db, DM9000_EPDRH);
Ben Dooks9a2f0372008-02-05 00:02:10 +00001149
Ben Dooks621ddcb2008-02-05 00:02:14 +00001150 spin_unlock_irqrestore(&db->lock, flags);
1151
Ben Dooks9a2f0372008-02-05 00:02:10 +00001152 mutex_unlock(&db->addr_lock);
Sascha Hauera1365272005-05-05 15:14:15 -07001153}
1154
Sascha Hauera1365272005-05-05 15:14:15 -07001155/*
1156 * Write a word data to SROM
1157 */
1158static void
Ben Dooks29d52e52008-02-05 00:02:11 +00001159dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
Sascha Hauera1365272005-05-05 15:14:15 -07001160{
Ben Dooks621ddcb2008-02-05 00:02:14 +00001161 unsigned long flags;
1162
Ben Dooksbb44fb702008-02-05 00:02:20 +00001163 if (db->flags & DM9000_PLATF_NO_EEPROM)
1164 return;
1165
Ben Dooks9a2f0372008-02-05 00:02:10 +00001166 mutex_lock(&db->addr_lock);
1167
Ben Dooks621ddcb2008-02-05 00:02:14 +00001168 spin_lock_irqsave(&db->lock, flags);
Sascha Hauera1365272005-05-05 15:14:15 -07001169 iow(db, DM9000_EPAR, offset);
Ben Dooks29d52e52008-02-05 00:02:11 +00001170 iow(db, DM9000_EPDRH, data[1]);
1171 iow(db, DM9000_EPDRL, data[0]);
Sascha Hauera1365272005-05-05 15:14:15 -07001172 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
Ben Dooks621ddcb2008-02-05 00:02:14 +00001173 spin_unlock_irqrestore(&db->lock, flags);
1174
Ben Dooks39c341a2008-02-05 00:02:17 +00001175 dm9000_wait_eeprom(db);
1176
1177 mdelay(1); /* wait at least 150uS to clear */
Ben Dooks621ddcb2008-02-05 00:02:14 +00001178
1179 spin_lock_irqsave(&db->lock, flags);
Sascha Hauera1365272005-05-05 15:14:15 -07001180 iow(db, DM9000_EPCR, 0);
Ben Dooks621ddcb2008-02-05 00:02:14 +00001181 spin_unlock_irqrestore(&db->lock, flags);
Ben Dooks9a2f0372008-02-05 00:02:10 +00001182
1183 mutex_unlock(&db->addr_lock);
Sascha Hauera1365272005-05-05 15:14:15 -07001184}
1185
Sascha Hauera1365272005-05-05 15:14:15 -07001186/*
Sascha Hauera1365272005-05-05 15:14:15 -07001187 * Set DM9000 multicast address
1188 */
1189static void
1190dm9000_hash_table(struct net_device *dev)
1191{
1192 board_info_t *db = (board_info_t *) dev->priv;
1193 struct dev_mc_list *mcptr = dev->mc_list;
1194 int mc_cnt = dev->mc_count;
Ben Dooksd39cb7862008-02-05 00:02:18 +00001195 int i, oft;
Sascha Hauera1365272005-05-05 15:14:15 -07001196 u32 hash_val;
Ben Dooksd39cb7862008-02-05 00:02:18 +00001197 u16 hash_table[4];
Peter Korsgaard23d245b2008-03-18 23:17:16 +01001198 u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
Sascha Hauera1365272005-05-05 15:14:15 -07001199 unsigned long flags;
1200
Ben Dooks5b2b4ff2008-02-05 00:02:03 +00001201 dm9000_dbg(db, 1, "entering %s\n", __func__);
Sascha Hauera1365272005-05-05 15:14:15 -07001202
Ben Dooksd39cb7862008-02-05 00:02:18 +00001203 spin_lock_irqsave(&db->lock, flags);
Sascha Hauera1365272005-05-05 15:14:15 -07001204
Ben Dooksd39cb7862008-02-05 00:02:18 +00001205 for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
Sascha Hauera1365272005-05-05 15:14:15 -07001206 iow(db, oft, dev->dev_addr[i]);
1207
1208 /* Clear Hash Table */
1209 for (i = 0; i < 4; i++)
1210 hash_table[i] = 0x0;
1211
1212 /* broadcast address */
1213 hash_table[3] = 0x8000;
1214
Peter Korsgaard23d245b2008-03-18 23:17:16 +01001215 if (dev->flags & IFF_PROMISC)
1216 rcr |= RCR_PRMSC;
1217
1218 if (dev->flags & IFF_ALLMULTI)
1219 rcr |= RCR_ALL;
1220
Sascha Hauera1365272005-05-05 15:14:15 -07001221 /* the multicast address in Hash Table : 64 bits */
1222 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
Ben Dooksd39cb7862008-02-05 00:02:18 +00001223 hash_val = ether_crc_le(6, mcptr->dmi_addr) & 0x3f;
Sascha Hauera1365272005-05-05 15:14:15 -07001224 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1225 }
1226
1227 /* Write the hash table to MAC MD table */
Ben Dooksd39cb7862008-02-05 00:02:18 +00001228 for (i = 0, oft = DM9000_MAR; i < 4; i++) {
1229 iow(db, oft++, hash_table[i]);
1230 iow(db, oft++, hash_table[i] >> 8);
Sascha Hauera1365272005-05-05 15:14:15 -07001231 }
1232
Peter Korsgaard23d245b2008-03-18 23:17:16 +01001233 iow(db, DM9000_RCR, rcr);
Ben Dooksd39cb7862008-02-05 00:02:18 +00001234 spin_unlock_irqrestore(&db->lock, flags);
Sascha Hauera1365272005-05-05 15:14:15 -07001235}
1236
1237
1238/*
Ben Dooks321f69a2008-02-05 00:02:08 +00001239 * Sleep, either by using msleep() or if we are suspending, then
1240 * use mdelay() to sleep.
1241 */
1242static void dm9000_msleep(board_info_t *db, unsigned int ms)
1243{
1244 if (db->in_suspend)
1245 mdelay(ms);
1246 else
1247 msleep(ms);
1248}
1249
1250/*
Sascha Hauera1365272005-05-05 15:14:15 -07001251 * Read a word from phyxcer
1252 */
1253static int
1254dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1255{
1256 board_info_t *db = (board_info_t *) dev->priv;
1257 unsigned long flags;
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001258 unsigned int reg_save;
Sascha Hauera1365272005-05-05 15:14:15 -07001259 int ret;
1260
Ben Dooks9a2f0372008-02-05 00:02:10 +00001261 mutex_lock(&db->addr_lock);
1262
Sascha Hauera1365272005-05-05 15:14:15 -07001263 spin_lock_irqsave(&db->lock,flags);
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001264
1265 /* Save previous register address */
1266 reg_save = readb(db->io_addr);
1267
Sascha Hauera1365272005-05-05 15:14:15 -07001268 /* Fill the phyxcer register into REG_0C */
1269 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1270
1271 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
Ben Dooks89c8b0e2008-02-05 00:02:07 +00001272
1273 writeb(reg_save, db->io_addr);
1274 spin_unlock_irqrestore(&db->lock,flags);
1275
Ben Dooks321f69a2008-02-05 00:02:08 +00001276 dm9000_msleep(db, 1); /* Wait read complete */
Ben Dooks89c8b0e2008-02-05 00:02:07 +00001277
1278 spin_lock_irqsave(&db->lock,flags);
1279 reg_save = readb(db->io_addr);
1280
Sascha Hauera1365272005-05-05 15:14:15 -07001281 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1282
1283 /* The read data keeps on REG_0D & REG_0E */
1284 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1285
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001286 /* restore the previous address */
1287 writeb(reg_save, db->io_addr);
Sascha Hauera1365272005-05-05 15:14:15 -07001288 spin_unlock_irqrestore(&db->lock,flags);
1289
Ben Dooks9a2f0372008-02-05 00:02:10 +00001290 mutex_unlock(&db->addr_lock);
Sascha Hauera1365272005-05-05 15:14:15 -07001291 return ret;
1292}
1293
1294/*
1295 * Write a word to phyxcer
1296 */
1297static void
1298dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1299{
1300 board_info_t *db = (board_info_t *) dev->priv;
1301 unsigned long flags;
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001302 unsigned long reg_save;
Sascha Hauera1365272005-05-05 15:14:15 -07001303
Ben Dooks9a2f0372008-02-05 00:02:10 +00001304 mutex_lock(&db->addr_lock);
1305
Sascha Hauera1365272005-05-05 15:14:15 -07001306 spin_lock_irqsave(&db->lock,flags);
1307
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001308 /* Save previous register address */
1309 reg_save = readb(db->io_addr);
1310
Sascha Hauera1365272005-05-05 15:14:15 -07001311 /* Fill the phyxcer register into REG_0C */
1312 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1313
1314 /* Fill the written data into REG_0D & REG_0E */
Ben Dooks073d3f42008-02-05 00:02:19 +00001315 iow(db, DM9000_EPDRL, value);
1316 iow(db, DM9000_EPDRH, value >> 8);
Sascha Hauera1365272005-05-05 15:14:15 -07001317
1318 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
Ben Dooks89c8b0e2008-02-05 00:02:07 +00001319
1320 writeb(reg_save, db->io_addr);
Ben Dooks9a2f0372008-02-05 00:02:10 +00001321 spin_unlock_irqrestore(&db->lock, flags);
Ben Dooks89c8b0e2008-02-05 00:02:07 +00001322
Ben Dooks321f69a2008-02-05 00:02:08 +00001323 dm9000_msleep(db, 1); /* Wait write complete */
Ben Dooks89c8b0e2008-02-05 00:02:07 +00001324
1325 spin_lock_irqsave(&db->lock,flags);
1326 reg_save = readb(db->io_addr);
1327
Sascha Hauera1365272005-05-05 15:14:15 -07001328 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1329
Ben Dooks9ef9ac52005-07-23 17:25:18 +01001330 /* restore the previous address */
1331 writeb(reg_save, db->io_addr);
1332
Ben Dooks9a2f0372008-02-05 00:02:10 +00001333 spin_unlock_irqrestore(&db->lock, flags);
1334 mutex_unlock(&db->addr_lock);
Sascha Hauera1365272005-05-05 15:14:15 -07001335}
1336
1337static int
Russell King3ae5eae2005-11-09 22:32:44 +00001338dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
Sascha Hauera1365272005-05-05 15:14:15 -07001339{
Russell King3ae5eae2005-11-09 22:32:44 +00001340 struct net_device *ndev = platform_get_drvdata(dev);
Ben Dooks321f69a2008-02-05 00:02:08 +00001341 board_info_t *db;
Sascha Hauera1365272005-05-05 15:14:15 -07001342
Russell King9480e302005-10-28 09:52:56 -07001343 if (ndev) {
Ben Dooks321f69a2008-02-05 00:02:08 +00001344 db = (board_info_t *) ndev->priv;
1345 db->in_suspend = 1;
1346
Sascha Hauera1365272005-05-05 15:14:15 -07001347 if (netif_running(ndev)) {
1348 netif_device_detach(ndev);
1349 dm9000_shutdown(ndev);
1350 }
1351 }
1352 return 0;
1353}
1354
1355static int
Russell King3ae5eae2005-11-09 22:32:44 +00001356dm9000_drv_resume(struct platform_device *dev)
Sascha Hauera1365272005-05-05 15:14:15 -07001357{
Russell King3ae5eae2005-11-09 22:32:44 +00001358 struct net_device *ndev = platform_get_drvdata(dev);
Sascha Hauera1365272005-05-05 15:14:15 -07001359 board_info_t *db = (board_info_t *) ndev->priv;
1360
Russell King9480e302005-10-28 09:52:56 -07001361 if (ndev) {
Sascha Hauera1365272005-05-05 15:14:15 -07001362
1363 if (netif_running(ndev)) {
1364 dm9000_reset(db);
1365 dm9000_init_dm9000(ndev);
1366
1367 netif_device_attach(ndev);
1368 }
Ben Dooks321f69a2008-02-05 00:02:08 +00001369
1370 db->in_suspend = 0;
Sascha Hauera1365272005-05-05 15:14:15 -07001371 }
1372 return 0;
1373}
1374
1375static int
Russell King3ae5eae2005-11-09 22:32:44 +00001376dm9000_drv_remove(struct platform_device *pdev)
Sascha Hauera1365272005-05-05 15:14:15 -07001377{
Russell King3ae5eae2005-11-09 22:32:44 +00001378 struct net_device *ndev = platform_get_drvdata(pdev);
Sascha Hauera1365272005-05-05 15:14:15 -07001379
Russell King3ae5eae2005-11-09 22:32:44 +00001380 platform_set_drvdata(pdev, NULL);
Sascha Hauera1365272005-05-05 15:14:15 -07001381
1382 unregister_netdev(ndev);
1383 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
Ben Dooks9fd9f9b2007-05-07 11:13:25 +00001384 free_netdev(ndev); /* free device structure */
Sascha Hauera1365272005-05-05 15:14:15 -07001385
Ben Dooksa76836f2008-02-05 00:02:02 +00001386 dev_dbg(&pdev->dev, "released and freed device\n");
Sascha Hauera1365272005-05-05 15:14:15 -07001387 return 0;
1388}
1389
Russell King3ae5eae2005-11-09 22:32:44 +00001390static struct platform_driver dm9000_driver = {
Ben Dooks5d22a312006-06-14 00:09:17 +01001391 .driver = {
1392 .name = "dm9000",
1393 .owner = THIS_MODULE,
1394 },
Sascha Hauera1365272005-05-05 15:14:15 -07001395 .probe = dm9000_probe,
1396 .remove = dm9000_drv_remove,
1397 .suspend = dm9000_drv_suspend,
1398 .resume = dm9000_drv_resume,
1399};
1400
1401static int __init
1402dm9000_init(void)
1403{
Ben Dooks7da99852008-02-05 00:02:06 +00001404 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
Ben Dooks2ae2d772005-07-23 17:29:38 +01001405
Russell King3ae5eae2005-11-09 22:32:44 +00001406 return platform_driver_register(&dm9000_driver); /* search board and register */
Sascha Hauera1365272005-05-05 15:14:15 -07001407}
1408
1409static void __exit
1410dm9000_cleanup(void)
1411{
Russell King3ae5eae2005-11-09 22:32:44 +00001412 platform_driver_unregister(&dm9000_driver);
Sascha Hauera1365272005-05-05 15:14:15 -07001413}
1414
1415module_init(dm9000_init);
1416module_exit(dm9000_cleanup);
1417
1418MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1419MODULE_DESCRIPTION("Davicom DM9000 network driver");
1420MODULE_LICENSE("GPL");
Kay Sievers72abb462008-04-18 13:50:44 -07001421MODULE_ALIAS("platform:dm9000");