aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/net/ax88796.c
blob: 7495a9ee8f4bff6dde5b7c7666398d35882059fd (plain) (tree)
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462

























                                                                       
                               


















































































































































































































































































































































































































































                                                                                            
                                                        































                                                                        
                                                         






















































































                                                                           

  






























                                                                 

























































                                                                                
















                                                                  

















































































































































































                                                                              
                                                      

                                    


                                                                            


























                                                                            
                                                                           

































































































                                                                      
/* drivers/net/ax88796.c
 *
 * Copyright 2005,2007 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *
 * Asix AX88796 10/100 Ethernet controller support
 *	Based on ne.c, by Donald Becker, et-al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/isapnp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/eeprom_93cx6.h>

#include <net/ax88796.h>

#include <asm/system.h>
#include <asm/io.h>

static int phy_debug = 0;

/* Rename the lib8390.c functions to show that they are in this driver */
#define __ei_open       ax_ei_open
#define __ei_close      ax_ei_close
#define __ei_poll	ax_ei_poll
#define __ei_tx_timeout ax_ei_tx_timeout
#define __ei_interrupt  ax_ei_interrupt
#define ____alloc_ei_netdev ax__alloc_ei_netdev
#define __NS8390_init   ax_NS8390_init

/* force unsigned long back to 'void __iomem *' */
#define ax_convert_addr(_a) ((void __force __iomem *)(_a))

#define ei_inb(_a)	readb(ax_convert_addr(_a))
#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))

#define ei_inb_p(_a)	ei_inb(_a)
#define ei_outb_p(_v, _a) ei_outb(_v, _a)

/* define EI_SHIFT() to take into account our register offsets */
#define EI_SHIFT(x)     (ei_local->reg_offset[(x)])

/* Ensure we have our RCR base value */
#define AX88796_PLATFORM

static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";

#include "lib8390.c"

#define DRV_NAME "ax88796"
#define DRV_VERSION "1.00"

/* from ne.c */
#define NE_CMD		EI_SHIFT(0x00)
#define NE_RESET	EI_SHIFT(0x1f)
#define NE_DATAPORT	EI_SHIFT(0x10)

#define NE1SM_START_PG	0x20	/* First page of TX buffer */
#define NE1SM_STOP_PG 	0x40	/* Last page +1 of RX ring */
#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */

/* device private data */

struct ax_device {
	struct timer_list	 mii_timer;
	spinlock_t		 mii_lock;
	struct mii_if_info	 mii;

	u32			 msg_enable;
	void __iomem		*map2;
	struct platform_device	*dev;
	struct resource		*mem;
	struct resource		*mem2;
	struct ax_plat_data	*plat;

	unsigned char		 running;
	unsigned char		 resume_open;

	u32			 reg_offsets[0x20];
};

static inline struct ax_device *to_ax_dev(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	return (struct ax_device *)(ei_local+1);
}

/* ax_initial_check
 *
 * do an initial probe for the card to check wether it exists
 * and is functional
 */

static int ax_initial_check(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *ioaddr = ei_local->mem;
	int reg0;
	int regd;

	reg0 = ei_inb(ioaddr);
	if (reg0 == 0xFF)
		return -ENODEV;

	ei_outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
	regd = ei_inb(ioaddr + 0x0d);
	ei_outb(0xff, ioaddr + 0x0d);
	ei_outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
	ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
	if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
		ei_outb(reg0, ioaddr);
		ei_outb(regd, ioaddr + 0x0d);	/* Restore the old values. */
		return -ENODEV;
	}

	return 0;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */

static void ax_reset_8390(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	unsigned long reset_start_time = jiffies;
	void __iomem *addr = (void __iomem *)dev->base_addr;

	if (ei_debug > 1)
		printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);

	ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);

	ei_status.txing = 0;
	ei_status.dmaing = 0;

	/* This check _should_not_ be necessary, omit eventually. */
	while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
		if (jiffies - reset_start_time > 2*HZ/100) {
			printk(KERN_WARNING "%s: %s did not complete.\n",
			       __FUNCTION__, dev->name);
			break;
		}
	}

	ei_outb(ENISR_RESET, addr + EN0_ISR);	/* Ack intr. */
}


static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
			    int ring_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing) {
		printk(KERN_EMERG "%s: DMAing conflict in %s [DMAstat:%d][irqlock:%d].\n",
			dev->name, __FUNCTION__,
		       ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;
	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
	ei_outb(0, nic_base + EN0_RCNTHI);
	ei_outb(0, nic_base + EN0_RSARLO);		/* On page boundary */
	ei_outb(ring_page, nic_base + EN0_RSARHI);
	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_status.word16)
		readsw(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
	else
		readsb(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;

	le16_to_cpus(&hdr->count);
}


/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for hints.
   The NEx000 doesn't share the on-board packet memory -- you have to put
   the packet out through the "remote DMA" dataport using ei_outb. */

static void ax_block_input(struct net_device *dev, int count,
			   struct sk_buff *skb, int ring_offset)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;
	char *buf = skb->data;

	if (ei_status.dmaing) {
		printk(KERN_EMERG "%s: DMAing conflict in ax_block_input "
			"[DMAstat:%d][irqlock:%d].\n",
			dev->name, ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;

	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
	ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
	ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

	if (ei_status.word16) {
		readsw(nic_base + NE_DATAPORT, buf, count >> 1);
		if (count & 0x01)
			buf[count-1] = ei_inb(nic_base + NE_DATAPORT);

	} else {
		readsb(nic_base + NE_DATAPORT, buf, count);
	}

	ei_status.dmaing &= ~1;
}

static void ax_block_output(struct net_device *dev, int count,
			    const unsigned char *buf, const int start_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *nic_base = ei_local->mem;
	unsigned long dma_start;

	/* Round the count up for word writes.  Do we need to do this?
	   What effect will an odd byte count have on the 8390?
	   I should check someday. */

	if (ei_status.word16 && (count & 0x01))
		count++;

	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
	if (ei_status.dmaing) {
		printk(KERN_EMERG "%s: DMAing conflict in %s."
			"[DMAstat:%d][irqlock:%d]\n",
			dev->name, __FUNCTION__,
		       ei_status.dmaing, ei_status.irqlock);
		return;
	}

	ei_status.dmaing |= 0x01;
	/* We should already be in page 0, but to be safe... */
	ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);

	/* Now the normal output. */
	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
	ei_outb(count >> 8,   nic_base + EN0_RCNTHI);
	ei_outb(0x00, nic_base + EN0_RSARLO);
	ei_outb(start_page, nic_base + EN0_RSARHI);

	ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
	if (ei_status.word16) {
		writesw(nic_base + NE_DATAPORT, buf, count>>1);
	} else {
		writesb(nic_base + NE_DATAPORT, buf, count);
	}

	dma_start = jiffies;

	while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
		if (jiffies - dma_start > 2*HZ/100) {		/* 20ms */
			printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
			ax_reset_8390(dev);
			ax_NS8390_init(dev,1);
			break;
		}
	}

	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
	ei_status.dmaing &= ~0x01;
	return;
}

/* definitions for accessing MII/EEPROM interface */

#define AX_MEMR			EI_SHIFT(0x14)
#define AX_MEMR_MDC		(1<<0)
#define AX_MEMR_MDIR		(1<<1)
#define AX_MEMR_MDI		(1<<2)
#define AX_MEMR_MDO		(1<<3)
#define AX_MEMR_EECS		(1<<4)
#define AX_MEMR_EEI		(1<<5)
#define AX_MEMR_EEO		(1<<6)
#define AX_MEMR_EECLK		(1<<7)

/* ax_mii_ei_outbits
 *
 * write the specified set of bits to the phy
*/

static void
ax_mii_ei_outbits(struct net_device *dev, unsigned int bits, int len)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
	unsigned int memr;

	/* clock low, data to output mode */
	memr = ei_inb(memr_addr);
	memr &= ~(AX_MEMR_MDC | AX_MEMR_MDIR);
	ei_outb(memr, memr_addr);

	for (len--; len >= 0; len--) {
		if (bits & (1 << len))
			memr |= AX_MEMR_MDO;
		else
			memr &= ~AX_MEMR_MDO;

		ei_outb(memr, memr_addr);

		/* clock high */

		ei_outb(memr | AX_MEMR_MDC, memr_addr);
		udelay(1);

		/* clock low */
		ei_outb(memr, memr_addr);
	}

	/* leaves the clock line low, mdir input */
	memr |= AX_MEMR_MDIR;
	ei_outb(memr, (void __iomem *)dev->base_addr + AX_MEMR);
}

/* ax_phy_ei_inbits
 *
 * read a specified number of bits from the phy
*/

static unsigned int
ax_phy_ei_inbits(struct net_device *dev, int no)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
	unsigned int memr;
	unsigned int result = 0;

	/* clock low, data to input mode */
	memr = ei_inb(memr_addr);
	memr &= ~AX_MEMR_MDC;
	memr |= AX_MEMR_MDIR;
	ei_outb(memr, memr_addr);

	for (no--; no >= 0; no--) {
		ei_outb(memr | AX_MEMR_MDC, memr_addr);

		udelay(1);

		if (ei_inb(memr_addr) & AX_MEMR_MDI)
			result |= (1<<no);

		ei_outb(memr, memr_addr);
	}

	return result;
}

/* ax_phy_issueaddr
 *
 * use the low level bit shifting routines to send the address
 * and command to the specified phy
*/

static void
ax_phy_issueaddr(struct net_device *dev, int phy_addr, int reg, int opc)
{
	if (phy_debug)
		pr_debug("%s: dev %p, %04x, %04x, %d\n",
			__FUNCTION__, dev, phy_addr, reg, opc);

	ax_mii_ei_outbits(dev, 0x3f, 6);	/* pre-amble */
	ax_mii_ei_outbits(dev, 1, 2);		/* frame-start */
	ax_mii_ei_outbits(dev, opc, 2);		/* op code */
	ax_mii_ei_outbits(dev, phy_addr, 5);	/* phy address */
	ax_mii_ei_outbits(dev, reg, 5);		/* reg address */
}

static int
ax_phy_read(struct net_device *dev, int phy_addr, int reg)
{
	struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
	unsigned long flags;
 	unsigned int result;

      	spin_lock_irqsave(&ei_local->page_lock, flags);

	ax_phy_issueaddr(dev, phy_addr, reg, 2);

	result = ax_phy_ei_inbits(dev, 17);
	result &= ~(3<<16);

      	spin_unlock_irqrestore(&ei_local->page_lock, flags);

	if (phy_debug)
		pr_debug("%s: %04x.%04x => read %04x\n", __FUNCTION__,
			 phy_addr, reg, result);

	return result;
}

static void
ax_phy_write(struct net_device *dev, int phy_addr, int reg, int value)
{
	struct ei_device *ei = (struct ei_device *) netdev_priv(dev);
	unsigned long flags;

	printk(KERN_DEBUG "%s: %p, %04x, %04x %04x\n",
	       __FUNCTION__, dev, phy_addr, reg, value);

      	spin_lock_irqsave(&ei->page_lock, flags);

	ax_phy_issueaddr(dev, phy_addr, reg, 1);
	ax_mii_ei_outbits(dev, 2, 2);		/* send TA */
	ax_mii_ei_outbits(dev, value, 16);

      	spin_unlock_irqrestore(&ei->page_lock, flags);
}

static void ax_mii_expiry(unsigned long data)
{
	struct net_device *dev = (struct net_device *)data;
	struct ax_device  *ax = to_ax_dev(dev);
	unsigned long flags;

	spin_lock_irqsave(&ax->mii_lock, flags);
	mii_check_media(&ax->mii, netif_msg_link(ax), 0);
	spin_unlock_irqrestore(&ax->mii_lock, flags);

	if (ax->running) {
		ax->mii_timer.expires = jiffies + HZ*2;
		add_timer(&ax->mii_timer);
	}
}

static int ax_open(struct net_device *dev)
{
	struct ax_device  *ax = to_ax_dev(dev);
	struct ei_device *ei_local = netdev_priv(dev);
	int ret;

	dev_dbg(&ax->dev->dev, "%s: open\n", dev->name);

	ret = request_irq(dev->irq, ax_ei_interrupt, 0, dev->name, dev);
	if (ret)
		return ret;

	ret = ax_ei_open(dev);
	if (ret)
		return ret;

	/* turn the phy on (if turned off) */

	ei_outb(ax->plat->gpoc_val, ei_local->mem + EI_SHIFT(0x17));
	ax->running = 1;

	/* start the MII timer */

	init_timer(&ax->mii_timer);

	ax->mii_timer.expires  = jiffies+1;
	ax->mii_timer.data     = (unsigned long) dev;
	ax->mii_timer.function = ax_mii_expiry;

	add_timer(&ax->mii_timer);

	return 0;
}

static int ax_close(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	struct ei_device *ei_local = netdev_priv(dev);

	dev_dbg(&ax->dev->dev, "%s: close\n", dev->name);

	/* turn the phy off */

	ei_outb(ax->plat->gpoc_val | (1<<6),
	       ei_local->mem + EI_SHIFT(0x17));

	ax->running = 0;
	wmb();

	del_timer_sync(&ax->mii_timer);
	ax_ei_close(dev);

	free_irq(dev->irq, dev);
	return 0;
}

static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;
	int rc;

	if (!netif_running(dev))
		return -EINVAL;

	spin_lock_irqsave(&ax->mii_lock, flags);
	rc = generic_mii_ioctl(&ax->mii, if_mii(req), cmd, NULL);
	spin_unlock_irqrestore(&ax->mii_lock, flags);

	return rc;
}

/* ethtool ops */

static void ax_get_drvinfo(struct net_device *dev,
			   struct ethtool_drvinfo *info)
{
	struct ax_device *ax = to_ax_dev(dev);

	strcpy(info->driver, DRV_NAME);
	strcpy(info->version, DRV_VERSION);
	strcpy(info->bus_info, ax->dev->name);
}

static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;

	spin_lock_irqsave(&ax->mii_lock, flags);
	mii_ethtool_gset(&ax->mii, cmd);
	spin_lock_irqsave(&ax->mii_lock, flags);

	return 0;
}

static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
	struct ax_device *ax = to_ax_dev(dev);
	unsigned long flags;
	int rc;

	spin_lock_irqsave(&ax->mii_lock, flags);
	rc = mii_ethtool_sset(&ax->mii, cmd);
	spin_lock_irqsave(&ax->mii_lock, flags);

	return rc;
}

static int ax_nway_reset(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	return mii_nway_restart(&ax->mii);
}

static u32 ax_get_link(struct net_device *dev)
{
	struct ax_device *ax = to_ax_dev(dev);
	return mii_link_ok(&ax->mii);
}

static const struct ethtool_ops ax_ethtool_ops = {
	.get_drvinfo		= ax_get_drvinfo,
	.get_settings		= ax_get_settings,
	.set_settings		= ax_set_settings,
	.nway_reset		= ax_nway_reset,
	.get_link		= ax_get_link,
};

#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	eeprom->reg_data_in = reg & AX_MEMR_EEI;
	eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
	eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
	eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}

static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
	struct ei_device *ei_local = eeprom->data;
	u8 reg = ei_inb(ei_local->mem + AX_MEMR);

	reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);

	if (eeprom->reg_data_in)
		reg |= AX_MEMR_EEI;
	if (eeprom->reg_data_clock)
		reg |= AX_MEMR_EECLK;
	if (eeprom->reg_chip_select)
		reg |= AX_MEMR_EECS;

	ei_outb(reg, ei_local->mem + AX_MEMR);
	udelay(10);
}
#endif

/* setup code */

static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
{
	void __iomem *ioaddr = ei_local->mem;
	struct ax_device *ax = to_ax_dev(dev);

	/* Select page 0*/
	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr + E8390_CMD);

	/* set to byte access */
	ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
	ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
}

/* ax_init_dev
 *
 * initialise the specified device, taking care to note the MAC
 * address it may already have (if configured), ensure
 * the device is ready to be used by lib8390.c and registerd with
 * the network layer.
 */

static int ax_init_dev(struct net_device *dev, int first_init)
{
	struct ei_device *ei_local = netdev_priv(dev);
	struct ax_device *ax = to_ax_dev(dev);
	void __iomem *ioaddr = ei_local->mem;
	unsigned int start_page;
	unsigned int stop_page;
	int ret;
	int i;

	ret = ax_initial_check(dev);
	if (ret)
		goto err_out;

	/* setup goes here */

	ax_initial_setup(dev, ei_local);

	/* read the mac from the card prom if we need it */

	if (first_init && ax->plat->flags & AXFLG_HAS_EEPROM) {
		unsigned char SA_prom[32];

		for(i = 0; i < sizeof(SA_prom); i+=2) {
			SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
			SA_prom[i+1] = ei_inb(ioaddr + NE_DATAPORT);
		}

		if (ax->plat->wordlength == 2)
			for (i = 0; i < 16; i++)
				SA_prom[i] = SA_prom[i+i];

		memcpy(dev->dev_addr,  SA_prom, 6);
	}

#ifdef CONFIG_AX88796_93CX6
	if (first_init && ax->plat->flags & AXFLG_HAS_93CX6) {
		unsigned char mac_addr[6];
		struct eeprom_93cx6 eeprom;

		eeprom.data = ei_local;
		eeprom.register_read = ax_eeprom_register_read;
		eeprom.register_write = ax_eeprom_register_write;
		eeprom.width = PCI_EEPROM_WIDTH_93C56;

		eeprom_93cx6_multiread(&eeprom, 0,
				       (__le16 __force *)mac_addr,
				       sizeof(mac_addr) >> 1);

		memcpy(dev->dev_addr,  mac_addr, 6);
	}
#endif
	if (ax->plat->wordlength == 2) {
		/* We must set the 8390 for word mode. */
		ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
		start_page = NESM_START_PG;
		stop_page = NESM_STOP_PG;
	} else {
		start_page = NE1SM_START_PG;
		stop_page = NE1SM_STOP_PG;
	}

	/* load the mac-address from the device if this is the
	 * first time we've initialised */

	if (first_init && ax->plat->flags & AXFLG_MAC_FROMDEV) {
		ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
			ei_local->mem + E8390_CMD); /* 0x61 */

		for (i = 0 ; i < ETHER_ADDR_LEN ; i++)
			dev->dev_addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
	}

	ax_reset_8390(dev);

	ei_status.name = "AX88796";
	ei_status.tx_start_page = start_page;
	ei_status.stop_page = stop_page;
	ei_status.word16 = (ax->plat->wordlength == 2);
	ei_status.rx_start_page = start_page + TX_PAGES;

#ifdef PACKETBUF_MEMSIZE
	 /* Allow the packet buffer size to be overridden by know-it-alls. */
	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif

	ei_status.reset_8390	= &ax_reset_8390;
	ei_status.block_input	= &ax_block_input;
	ei_status.block_output	= &ax_block_output;
	ei_status.get_8390_hdr	= &ax_get_8390_hdr;
	ei_status.priv = 0;

	dev->open		= ax_open;
	dev->stop		= ax_close;
	dev->do_ioctl		= ax_ioctl;
	dev->ethtool_ops	= &ax_ethtool_ops;

	ax->msg_enable		= NETIF_MSG_LINK;
	ax->mii.phy_id_mask	= 0x1f;
	ax->mii.reg_num_mask	= 0x1f;
	ax->mii.phy_id		= 0x10;		/* onboard phy */
	ax->mii.force_media	= 0;
	ax->mii.full_duplex	= 0;
	ax->mii.mdio_read	= ax_phy_read;
	ax->mii.mdio_write	= ax_phy_write;
	ax->mii.dev		= dev;

#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = ax_ei_poll;
#endif
	ax_NS8390_init(dev, 0);

	if (first_init) {
		printk("AX88796: %dbit, irq %d, %lx, MAC: ",
		       ei_status.word16 ? 16:8, dev->irq, dev->base_addr);

		for (i = 0; i < ETHER_ADDR_LEN; i++)
			printk("%2.2x%c", dev->dev_addr[i],
			       (i < (ETHER_ADDR_LEN-1) ? ':' : ' '));

		printk("\n");
	}

	ret = register_netdev(dev);
	if (ret)
		goto out_irq;

	return 0;

 out_irq:
	/* cleanup irq */
	free_irq(dev->irq, dev);
 err_out:
	return ret;
}

static int ax_remove(struct platform_device *_dev)
{
	struct net_device *dev = platform_get_drvdata(_dev);
	struct ax_device  *ax;

	ax = to_ax_dev(dev);

	unregister_netdev(dev);
	free_irq(dev->irq, dev);

	iounmap(ei_status.mem);
	release_resource(ax->mem);
	kfree(ax->mem);

	if (ax->map2) {
		iounmap(ax->map2);
		release_resource(ax->mem2);
		kfree(ax->mem2);
	}

	free_netdev(dev);

	return 0;
}

/* ax_probe
 *
 * This is the entry point when the platform device system uses to
 * notify us of a new device to attach to. Allocate memory, find
 * the resources and information passed, and map the necessary registers.
*/

static int ax_probe(struct platform_device *pdev)
{
	struct net_device *dev;
	struct ax_device  *ax;
	struct resource   *res;
	size_t size;
	int ret;

	dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
	if (dev == NULL)
		return -ENOMEM;

	/* ok, let's setup our device */
	ax = to_ax_dev(dev);

	memset(ax, 0, sizeof(struct ax_device));

	spin_lock_init(&ax->mii_lock);

	ax->dev = pdev;
	ax->plat = pdev->dev.platform_data;
	platform_set_drvdata(pdev, dev);

	ei_status.rxcr_base  = ax->plat->rcr_val;

	/* find the platform resources */

	dev->irq  = platform_get_irq(pdev, 0);
	if (dev->irq < 0) {
		dev_err(&pdev->dev, "no IRQ specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (res == NULL) {
		dev_err(&pdev->dev, "no MEM specified\n");
		ret = -ENXIO;
		goto exit_mem;
	}

	size = (res->end - res->start) + 1;

	/* setup the register offsets from either the platform data
	 * or by using the size of the resource provided */

	if (ax->plat->reg_offsets)
		ei_status.reg_offset = ax->plat->reg_offsets;
	else {
		ei_status.reg_offset = ax->reg_offsets;
		for (ret = 0; ret < 0x18; ret++)
			ax->reg_offsets[ret] = (size / 0x18) * ret;
	}

	ax->mem = request_mem_region(res->start, size, pdev->name);
	if (ax->mem == NULL) {
		dev_err(&pdev->dev, "cannot reserve registers\n");
 		ret = -ENXIO;
		goto exit_mem;
	}

	ei_status.mem = ioremap(res->start, size);
	dev->base_addr = (unsigned long)ei_status.mem;

	if (ei_status.mem == NULL) {
		dev_err(&pdev->dev, "Cannot ioremap area (%08llx,%08llx)\n",
			(unsigned long long)res->start,
			(unsigned long long)res->end);

 		ret = -ENXIO;
		goto exit_req;
	}

	/* look for reset area */

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (res == NULL) {
		if (!ax->plat->reg_offsets) {
			for (ret = 0; ret < 0x20; ret++)
				ax->reg_offsets[ret] = (size / 0x20) * ret;
		}

		ax->map2 = NULL;
	} else {
 		size = (res->end - res->start) + 1;

		ax->mem2 = request_mem_region(res->start, size, pdev->name);
		if (ax->mem == NULL) {
			dev_err(&pdev->dev, "cannot reserve registers\n");
			ret = -ENXIO;
			goto exit_mem1;
		}

		ax->map2 = ioremap(res->start, size);
		if (ax->map2 == NULL) {
			dev_err(&pdev->dev, "cannot map reset register\n");
			ret = -ENXIO;
			goto exit_mem2;
		}

		ei_status.reg_offset[0x1f] = ax->map2 - ei_status.mem;
	}

	/* got resources, now initialise and register device */

	ret = ax_init_dev(dev, 1);
	if (!ret)
		return 0;

	if (ax->map2 == NULL)
		goto exit_mem1;

	iounmap(ax->map2);

 exit_mem2:
	release_resource(ax->mem2);
	kfree(ax->mem2);

 exit_mem1:
	iounmap(ei_status.mem);

 exit_req:
	release_resource(ax->mem);
	kfree(ax->mem);

 exit_mem:
	free_netdev(dev);

	return ret;
}

/* suspend and resume */

#ifdef CONFIG_PM
static int ax_suspend(struct platform_device *dev, pm_message_t state)
{
	struct net_device *ndev = platform_get_drvdata(dev);
	struct ax_device  *ax = to_ax_dev(ndev);

	ax->resume_open = ax->running;

	netif_device_detach(ndev);
	ax_close(ndev);

	return 0;
}

static int ax_resume(struct platform_device *pdev)
{
	struct net_device *ndev = platform_get_drvdata(pdev);
	struct ax_device  *ax = to_ax_dev(ndev);

	ax_initial_setup(ndev, netdev_priv(ndev));
	ax_NS8390_init(ndev, ax->resume_open);
	netif_device_attach(ndev);

	if (ax->resume_open)
		ax_open(ndev);

	return 0;
}

#else
#define ax_suspend NULL
#define ax_resume  NULL
#endif

static struct platform_driver axdrv = {
	.driver	= {
		.name		= "ax88796",
		.owner		= THIS_MODULE,
	},
	.probe		= ax_probe,
	.remove		= ax_remove,
	.suspend	= ax_suspend,
	.resume		= ax_resume,
};

static int __init axdrv_init(void)
{
	return platform_driver_register(&axdrv);
}

static void __exit axdrv_exit(void)
{
	platform_driver_unregister(&axdrv);
}

module_init(axdrv_init);
module_exit(axdrv_exit);

MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_LICENSE("GPL v2");