1 /* drivers/net/ethernet/8390/ax88796.c
2  *
3  * Copyright 2005,2007 Simtec Electronics
4  *	Ben Dooks <ben@simtec.co.uk>
5  *
6  * Asix AX88796 10/100 Ethernet controller support
7  *	Based on ne.c, by Donald Becker, et-al.
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12  */
13 
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/isapnp.h>
18 #include <linux/interrupt.h>
19 #include <linux/io.h>
20 #include <linux/platform_device.h>
21 #include <linux/delay.h>
22 #include <linux/timer.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/mdio-bitbang.h>
27 #include <linux/phy.h>
28 #include <linux/eeprom_93cx6.h>
29 #include <linux/slab.h>
30 
31 #include <net/ax88796.h>
32 
33 
34 /* Rename the lib8390.c functions to show that they are in this driver */
35 #define __ei_open ax_ei_open
36 #define __ei_close ax_ei_close
37 #define __ei_poll ax_ei_poll
38 #define __ei_start_xmit ax_ei_start_xmit
39 #define __ei_tx_timeout ax_ei_tx_timeout
40 #define __ei_get_stats ax_ei_get_stats
41 #define __ei_set_multicast_list ax_ei_set_multicast_list
42 #define __ei_interrupt ax_ei_interrupt
43 #define ____alloc_ei_netdev ax__alloc_ei_netdev
44 #define __NS8390_init ax_NS8390_init
45 
46 /* force unsigned long back to 'void __iomem *' */
47 #define ax_convert_addr(_a) ((void __force __iomem *)(_a))
48 
49 #define ei_inb(_a) readb(ax_convert_addr(_a))
50 #define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))
51 
52 #define ei_inb_p(_a) ei_inb(_a)
53 #define ei_outb_p(_v, _a) ei_outb(_v, _a)
54 
55 /* define EI_SHIFT() to take into account our register offsets */
56 #define EI_SHIFT(x) (ei_local->reg_offset[(x)])
57 
58 /* Ensure we have our RCR base value */
59 #define AX88796_PLATFORM
60 
61 static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";
62 
63 #include "lib8390.c"
64 
65 #define DRV_NAME "ax88796"
66 #define DRV_VERSION "1.00"
67 
68 /* from ne.c */
69 #define NE_CMD		EI_SHIFT(0x00)
70 #define NE_RESET	EI_SHIFT(0x1f)
71 #define NE_DATAPORT	EI_SHIFT(0x10)
72 
73 #define NE1SM_START_PG	0x20	/* First page of TX buffer */
74 #define NE1SM_STOP_PG	0x40	/* Last page +1 of RX ring */
75 #define NESM_START_PG	0x40	/* First page of TX buffer */
76 #define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */
77 
78 #define AX_GPOC_PPDSET	BIT(6)
79 
80 static u32 ax_msg_enable;
81 
82 /* device private data */
83 
84 struct ax_device {
85 	struct mii_bus *mii_bus;
86 	struct mdiobb_ctrl bb_ctrl;
87 	struct phy_device *phy_dev;
88 	void __iomem *addr_memr;
89 	u8 reg_memr;
90 	int link;
91 	int speed;
92 	int duplex;
93 
94 	void __iomem *map2;
95 	const struct ax_plat_data *plat;
96 
97 	unsigned char running;
98 	unsigned char resume_open;
99 	unsigned int irqflags;
100 
101 	u32 reg_offsets[0x20];
102 };
103 
104 static inline struct ax_device *to_ax_dev(struct net_device *dev)
105 {
106 	struct ei_device *ei_local = netdev_priv(dev);
107 	return (struct ax_device *)(ei_local + 1);
108 }
109 
110 /*
111  * ax_initial_check
112  *
113  * do an initial probe for the card to check whether it exists
114  * and is functional
115  */
116 static int ax_initial_check(struct net_device *dev)
117 {
118 	struct ei_device *ei_local = netdev_priv(dev);
119 	void __iomem *ioaddr = ei_local->mem;
120 	int reg0;
121 	int regd;
122 
123 	reg0 = ei_inb(ioaddr);
124 	if (reg0 == 0xFF)
125 		return -ENODEV;
126 
127 	ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD);
128 	regd = ei_inb(ioaddr + 0x0d);
129 	ei_outb(0xff, ioaddr + 0x0d);
130 	ei_outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD);
131 	ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
132 	if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
133 		ei_outb(reg0, ioaddr);
134 		ei_outb(regd, ioaddr + 0x0d);	/* Restore the old values. */
135 		return -ENODEV;
136 	}
137 
138 	return 0;
139 }
140 
141 /*
142  * Hard reset the card. This used to pause for the same period that a
143  * 8390 reset command required, but that shouldn't be necessary.
144  */
145 static void ax_reset_8390(struct net_device *dev)
146 {
147 	struct ei_device *ei_local = netdev_priv(dev);
148 	unsigned long reset_start_time = jiffies;
149 	void __iomem *addr = (void __iomem *)dev->base_addr;
150 
151 	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
152 
153 	ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
154 
155 	ei_local->txing = 0;
156 	ei_local->dmaing = 0;
157 
158 	/* This check _should_not_ be necessary, omit eventually. */
159 	while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
160 		if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
161 			netdev_warn(dev, "%s: did not complete.\n", __func__);
162 			break;
163 		}
164 	}
165 
166 	ei_outb(ENISR_RESET, addr + EN0_ISR);	/* Ack intr. */
167 }
168 
169 
170 static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
171 			    int ring_page)
172 {
173 	struct ei_device *ei_local = netdev_priv(dev);
174 	void __iomem *nic_base = ei_local->mem;
175 
176 	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
177 	if (ei_local->dmaing) {
178 		netdev_err(dev, "DMAing conflict in %s "
179 			"[DMAstat:%d][irqlock:%d].\n",
180 			__func__,
181 			ei_local->dmaing, ei_local->irqlock);
182 		return;
183 	}
184 
185 	ei_local->dmaing |= 0x01;
186 	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
187 	ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
188 	ei_outb(0, nic_base + EN0_RCNTHI);
189 	ei_outb(0, nic_base + EN0_RSARLO);		/* On page boundary */
190 	ei_outb(ring_page, nic_base + EN0_RSARHI);
191 	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
192 
193 	if (ei_local->word16)
194 		ioread16_rep(nic_base + NE_DATAPORT, hdr,
195 			     sizeof(struct e8390_pkt_hdr) >> 1);
196 	else
197 		ioread8_rep(nic_base + NE_DATAPORT, hdr,
198 			    sizeof(struct e8390_pkt_hdr));
199 
200 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
201 	ei_local->dmaing &= ~0x01;
202 
203 	le16_to_cpus(&hdr->count);
204 }
205 
206 
207 /*
208  * Block input and output, similar to the Crynwr packet driver. If
209  * you are porting to a new ethercard, look at the packet driver
210  * source for hints. The NEx000 doesn't share the on-board packet
211  * memory -- you have to put the packet out through the "remote DMA"
212  * dataport using ei_outb.
213  */
214 static void ax_block_input(struct net_device *dev, int count,
215 			   struct sk_buff *skb, int ring_offset)
216 {
217 	struct ei_device *ei_local = netdev_priv(dev);
218 	void __iomem *nic_base = ei_local->mem;
219 	char *buf = skb->data;
220 
221 	if (ei_local->dmaing) {
222 		netdev_err(dev,
223 			"DMAing conflict in %s "
224 			"[DMAstat:%d][irqlock:%d].\n",
225 			__func__,
226 			ei_local->dmaing, ei_local->irqlock);
227 		return;
228 	}
229 
230 	ei_local->dmaing |= 0x01;
231 
232 	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + NE_CMD);
233 	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
234 	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
235 	ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
236 	ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
237 	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
238 
239 	if (ei_local->word16) {
240 		ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
241 		if (count & 0x01)
242 			buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
243 
244 	} else {
245 		ioread8_rep(nic_base + NE_DATAPORT, buf, count);
246 	}
247 
248 	ei_local->dmaing &= ~1;
249 }
250 
251 static void ax_block_output(struct net_device *dev, int count,
252 			    const unsigned char *buf, const int start_page)
253 {
254 	struct ei_device *ei_local = netdev_priv(dev);
255 	void __iomem *nic_base = ei_local->mem;
256 	unsigned long dma_start;
257 
258 	/*
259 	 * Round the count up for word writes. Do we need to do this?
260 	 * What effect will an odd byte count have on the 8390?  I
261 	 * should check someday.
262 	 */
263 	if (ei_local->word16 && (count & 0x01))
264 		count++;
265 
266 	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
267 	if (ei_local->dmaing) {
268 		netdev_err(dev, "DMAing conflict in %s."
269 			"[DMAstat:%d][irqlock:%d]\n",
270 			__func__,
271 		       ei_local->dmaing, ei_local->irqlock);
272 		return;
273 	}
274 
275 	ei_local->dmaing |= 0x01;
276 	/* We should already be in page 0, but to be safe... */
277 	ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
278 
279 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);
280 
281 	/* Now the normal output. */
282 	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
283 	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
284 	ei_outb(0x00, nic_base + EN0_RSARLO);
285 	ei_outb(start_page, nic_base + EN0_RSARHI);
286 
287 	ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
288 	if (ei_local->word16)
289 		iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
290 	else
291 		iowrite8_rep(nic_base + NE_DATAPORT, buf, count);
292 
293 	dma_start = jiffies;
294 
295 	while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
296 		if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
297 			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
298 			ax_reset_8390(dev);
299 			ax_NS8390_init(dev, 1);
300 			break;
301 		}
302 	}
303 
304 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
305 	ei_local->dmaing &= ~0x01;
306 }
307 
308 /* definitions for accessing MII/EEPROM interface */
309 
310 #define AX_MEMR			EI_SHIFT(0x14)
311 #define AX_MEMR_MDC		BIT(0)
312 #define AX_MEMR_MDIR		BIT(1)
313 #define AX_MEMR_MDI		BIT(2)
314 #define AX_MEMR_MDO		BIT(3)
315 #define AX_MEMR_EECS		BIT(4)
316 #define AX_MEMR_EEI		BIT(5)
317 #define AX_MEMR_EEO		BIT(6)
318 #define AX_MEMR_EECLK		BIT(7)
319 
320 static void ax_handle_link_change(struct net_device *dev)
321 {
322 	struct ax_device  *ax = to_ax_dev(dev);
323 	struct phy_device *phy_dev = ax->phy_dev;
324 	int status_change = 0;
325 
326 	if (phy_dev->link && ((ax->speed != phy_dev->speed) ||
327 			     (ax->duplex != phy_dev->duplex))) {
328 
329 		ax->speed = phy_dev->speed;
330 		ax->duplex = phy_dev->duplex;
331 		status_change = 1;
332 	}
333 
334 	if (phy_dev->link != ax->link) {
335 		if (!phy_dev->link) {
336 			ax->speed = 0;
337 			ax->duplex = -1;
338 		}
339 		ax->link = phy_dev->link;
340 
341 		status_change = 1;
342 	}
343 
344 	if (status_change)
345 		phy_print_status(phy_dev);
346 }
347 
348 static int ax_mii_probe(struct net_device *dev)
349 {
350 	struct ax_device  *ax = to_ax_dev(dev);
351 	struct phy_device *phy_dev = NULL;
352 	int ret;
353 
354 	/* find the first phy */
355 	phy_dev = phy_find_first(ax->mii_bus);
356 	if (!phy_dev) {
357 		netdev_err(dev, "no PHY found\n");
358 		return -ENODEV;
359 	}
360 
361 	ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change,
362 				 PHY_INTERFACE_MODE_MII);
363 	if (ret) {
364 		netdev_err(dev, "Could not attach to PHY\n");
365 		return ret;
366 	}
367 
368 	/* mask with MAC supported features */
369 	phy_dev->supported &= PHY_BASIC_FEATURES;
370 	phy_dev->advertising = phy_dev->supported;
371 
372 	ax->phy_dev = phy_dev;
373 
374 	netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
375 		    phy_dev->drv->name, dev_name(&phy_dev->dev), phy_dev->irq);
376 
377 	return 0;
378 }
379 
380 static void ax_phy_switch(struct net_device *dev, int on)
381 {
382 	struct ei_device *ei_local = netdev_priv(dev);
383 	struct ax_device *ax = to_ax_dev(dev);
384 
385 	u8 reg_gpoc =  ax->plat->gpoc_val;
386 
387 	if (!!on)
388 		reg_gpoc &= ~AX_GPOC_PPDSET;
389 	else
390 		reg_gpoc |= AX_GPOC_PPDSET;
391 
392 	ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17));
393 }
394 
395 static int ax_open(struct net_device *dev)
396 {
397 	struct ax_device *ax = to_ax_dev(dev);
398 	int ret;
399 
400 	netdev_dbg(dev, "open\n");
401 
402 	ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
403 			  dev->name, dev);
404 	if (ret)
405 		goto failed_request_irq;
406 
407 	/* turn the phy on (if turned off) */
408 	ax_phy_switch(dev, 1);
409 
410 	ret = ax_mii_probe(dev);
411 	if (ret)
412 		goto failed_mii_probe;
413 	phy_start(ax->phy_dev);
414 
415 	ret = ax_ei_open(dev);
416 	if (ret)
417 		goto failed_ax_ei_open;
418 
419 	ax->running = 1;
420 
421 	return 0;
422 
423  failed_ax_ei_open:
424 	phy_disconnect(ax->phy_dev);
425  failed_mii_probe:
426 	ax_phy_switch(dev, 0);
427 	free_irq(dev->irq, dev);
428  failed_request_irq:
429 	return ret;
430 }
431 
432 static int ax_close(struct net_device *dev)
433 {
434 	struct ax_device *ax = to_ax_dev(dev);
435 
436 	netdev_dbg(dev, "close\n");
437 
438 	ax->running = 0;
439 	wmb();
440 
441 	ax_ei_close(dev);
442 
443 	/* turn the phy off */
444 	ax_phy_switch(dev, 0);
445 	phy_disconnect(ax->phy_dev);
446 
447 	free_irq(dev->irq, dev);
448 	return 0;
449 }
450 
451 static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
452 {
453 	struct ax_device *ax = to_ax_dev(dev);
454 	struct phy_device *phy_dev = ax->phy_dev;
455 
456 	if (!netif_running(dev))
457 		return -EINVAL;
458 
459 	if (!phy_dev)
460 		return -ENODEV;
461 
462 	return phy_mii_ioctl(phy_dev, req, cmd);
463 }
464 
465 /* ethtool ops */
466 
467 static void ax_get_drvinfo(struct net_device *dev,
468 			   struct ethtool_drvinfo *info)
469 {
470 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
471 
472 	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
473 	strlcpy(info->version, DRV_VERSION, sizeof(info->version));
474 	strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
475 }
476 
477 static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
478 {
479 	struct ax_device *ax = to_ax_dev(dev);
480 	struct phy_device *phy_dev = ax->phy_dev;
481 
482 	if (!phy_dev)
483 		return -ENODEV;
484 
485 	return phy_ethtool_gset(phy_dev, cmd);
486 }
487 
488 static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
489 {
490 	struct ax_device *ax = to_ax_dev(dev);
491 	struct phy_device *phy_dev = ax->phy_dev;
492 
493 	if (!phy_dev)
494 		return -ENODEV;
495 
496 	return phy_ethtool_sset(phy_dev, cmd);
497 }
498 
499 static u32 ax_get_msglevel(struct net_device *dev)
500 {
501 	struct ei_device *ei_local = netdev_priv(dev);
502 
503 	return ei_local->msg_enable;
504 }
505 
506 static void ax_set_msglevel(struct net_device *dev, u32 v)
507 {
508 	struct ei_device *ei_local = netdev_priv(dev);
509 
510 	ei_local->msg_enable = v;
511 }
512 
513 static const struct ethtool_ops ax_ethtool_ops = {
514 	.get_drvinfo		= ax_get_drvinfo,
515 	.get_settings		= ax_get_settings,
516 	.set_settings		= ax_set_settings,
517 	.get_link		= ethtool_op_get_link,
518 	.get_ts_info		= ethtool_op_get_ts_info,
519 	.get_msglevel		= ax_get_msglevel,
520 	.set_msglevel		= ax_set_msglevel,
521 };
522 
523 #ifdef CONFIG_AX88796_93CX6
524 static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
525 {
526 	struct ei_device *ei_local = eeprom->data;
527 	u8 reg = ei_inb(ei_local->mem + AX_MEMR);
528 
529 	eeprom->reg_data_in = reg & AX_MEMR_EEI;
530 	eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
531 	eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
532 	eeprom->reg_chip_select = reg & AX_MEMR_EECS;
533 }
534 
535 static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
536 {
537 	struct ei_device *ei_local = eeprom->data;
538 	u8 reg = ei_inb(ei_local->mem + AX_MEMR);
539 
540 	reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
541 
542 	if (eeprom->reg_data_in)
543 		reg |= AX_MEMR_EEI;
544 	if (eeprom->reg_data_clock)
545 		reg |= AX_MEMR_EECLK;
546 	if (eeprom->reg_chip_select)
547 		reg |= AX_MEMR_EECS;
548 
549 	ei_outb(reg, ei_local->mem + AX_MEMR);
550 	udelay(10);
551 }
552 #endif
553 
554 static const struct net_device_ops ax_netdev_ops = {
555 	.ndo_open		= ax_open,
556 	.ndo_stop		= ax_close,
557 	.ndo_do_ioctl		= ax_ioctl,
558 
559 	.ndo_start_xmit		= ax_ei_start_xmit,
560 	.ndo_tx_timeout		= ax_ei_tx_timeout,
561 	.ndo_get_stats		= ax_ei_get_stats,
562 	.ndo_set_rx_mode	= ax_ei_set_multicast_list,
563 	.ndo_validate_addr	= eth_validate_addr,
564 	.ndo_set_mac_address	= eth_mac_addr,
565 	.ndo_change_mtu		= eth_change_mtu,
566 #ifdef CONFIG_NET_POLL_CONTROLLER
567 	.ndo_poll_controller	= ax_ei_poll,
568 #endif
569 };
570 
571 static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level)
572 {
573 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
574 
575 	if (level)
576 		ax->reg_memr |= AX_MEMR_MDC;
577 	else
578 		ax->reg_memr &= ~AX_MEMR_MDC;
579 
580 	ei_outb(ax->reg_memr, ax->addr_memr);
581 }
582 
583 static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output)
584 {
585 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
586 
587 	if (output)
588 		ax->reg_memr &= ~AX_MEMR_MDIR;
589 	else
590 		ax->reg_memr |= AX_MEMR_MDIR;
591 
592 	ei_outb(ax->reg_memr, ax->addr_memr);
593 }
594 
595 static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value)
596 {
597 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
598 
599 	if (value)
600 		ax->reg_memr |= AX_MEMR_MDO;
601 	else
602 		ax->reg_memr &= ~AX_MEMR_MDO;
603 
604 	ei_outb(ax->reg_memr, ax->addr_memr);
605 }
606 
607 static int ax_bb_get_data(struct mdiobb_ctrl *ctrl)
608 {
609 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
610 	int reg_memr = ei_inb(ax->addr_memr);
611 
612 	return reg_memr & AX_MEMR_MDI ? 1 : 0;
613 }
614 
615 static struct mdiobb_ops bb_ops = {
616 	.owner = THIS_MODULE,
617 	.set_mdc = ax_bb_mdc,
618 	.set_mdio_dir = ax_bb_dir,
619 	.set_mdio_data = ax_bb_set_data,
620 	.get_mdio_data = ax_bb_get_data,
621 };
622 
623 /* setup code */
624 
625 static int ax_mii_init(struct net_device *dev)
626 {
627 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
628 	struct ei_device *ei_local = netdev_priv(dev);
629 	struct ax_device *ax = to_ax_dev(dev);
630 	int err, i;
631 
632 	ax->bb_ctrl.ops = &bb_ops;
633 	ax->addr_memr = ei_local->mem + AX_MEMR;
634 	ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl);
635 	if (!ax->mii_bus) {
636 		err = -ENOMEM;
637 		goto out;
638 	}
639 
640 	ax->mii_bus->name = "ax88796_mii_bus";
641 	ax->mii_bus->parent = dev->dev.parent;
642 	snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
643 		pdev->name, pdev->id);
644 
645 	ax->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
646 	if (!ax->mii_bus->irq) {
647 		err = -ENOMEM;
648 		goto out_free_mdio_bitbang;
649 	}
650 
651 	for (i = 0; i < PHY_MAX_ADDR; i++)
652 		ax->mii_bus->irq[i] = PHY_POLL;
653 
654 	err = mdiobus_register(ax->mii_bus);
655 	if (err)
656 		goto out_free_irq;
657 
658 	return 0;
659 
660  out_free_irq:
661 	kfree(ax->mii_bus->irq);
662  out_free_mdio_bitbang:
663 	free_mdio_bitbang(ax->mii_bus);
664  out:
665 	return err;
666 }
667 
668 static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
669 {
670 	void __iomem *ioaddr = ei_local->mem;
671 	struct ax_device *ax = to_ax_dev(dev);
672 
673 	/* Select page 0 */
674 	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_STOP, ioaddr + E8390_CMD);
675 
676 	/* set to byte access */
677 	ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
678 	ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
679 }
680 
681 /*
682  * ax_init_dev
683  *
684  * initialise the specified device, taking care to note the MAC
685  * address it may already have (if configured), ensure
686  * the device is ready to be used by lib8390.c and registerd with
687  * the network layer.
688  */
689 static int ax_init_dev(struct net_device *dev)
690 {
691 	struct ei_device *ei_local = netdev_priv(dev);
692 	struct ax_device *ax = to_ax_dev(dev);
693 	void __iomem *ioaddr = ei_local->mem;
694 	unsigned int start_page;
695 	unsigned int stop_page;
696 	int ret;
697 	int i;
698 
699 	ret = ax_initial_check(dev);
700 	if (ret)
701 		goto err_out;
702 
703 	/* setup goes here */
704 
705 	ax_initial_setup(dev, ei_local);
706 
707 	/* read the mac from the card prom if we need it */
708 
709 	if (ax->plat->flags & AXFLG_HAS_EEPROM) {
710 		unsigned char SA_prom[32];
711 
712 		for (i = 0; i < sizeof(SA_prom); i += 2) {
713 			SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
714 			SA_prom[i + 1] = ei_inb(ioaddr + NE_DATAPORT);
715 		}
716 
717 		if (ax->plat->wordlength == 2)
718 			for (i = 0; i < 16; i++)
719 				SA_prom[i] = SA_prom[i+i];
720 
721 		memcpy(dev->dev_addr, SA_prom, ETH_ALEN);
722 	}
723 
724 #ifdef CONFIG_AX88796_93CX6
725 	if (ax->plat->flags & AXFLG_HAS_93CX6) {
726 		unsigned char mac_addr[ETH_ALEN];
727 		struct eeprom_93cx6 eeprom;
728 
729 		eeprom.data = ei_local;
730 		eeprom.register_read = ax_eeprom_register_read;
731 		eeprom.register_write = ax_eeprom_register_write;
732 		eeprom.width = PCI_EEPROM_WIDTH_93C56;
733 
734 		eeprom_93cx6_multiread(&eeprom, 0,
735 				       (__le16 __force *)mac_addr,
736 				       sizeof(mac_addr) >> 1);
737 
738 		memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
739 	}
740 #endif
741 	if (ax->plat->wordlength == 2) {
742 		/* We must set the 8390 for word mode. */
743 		ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
744 		start_page = NESM_START_PG;
745 		stop_page = NESM_STOP_PG;
746 	} else {
747 		start_page = NE1SM_START_PG;
748 		stop_page = NE1SM_STOP_PG;
749 	}
750 
751 	/* load the mac-address from the device */
752 	if (ax->plat->flags & AXFLG_MAC_FROMDEV) {
753 		ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
754 			ei_local->mem + E8390_CMD); /* 0x61 */
755 		for (i = 0; i < ETH_ALEN; i++)
756 			dev->dev_addr[i] =
757 				ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
758 	}
759 
760 	if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
761 	    ax->plat->mac_addr)
762 		memcpy(dev->dev_addr, ax->plat->mac_addr, ETH_ALEN);
763 
764 	ax_reset_8390(dev);
765 
766 	ei_local->name = "AX88796";
767 	ei_local->tx_start_page = start_page;
768 	ei_local->stop_page = stop_page;
769 	ei_local->word16 = (ax->plat->wordlength == 2);
770 	ei_local->rx_start_page = start_page + TX_PAGES;
771 
772 #ifdef PACKETBUF_MEMSIZE
773 	/* Allow the packet buffer size to be overridden by know-it-alls. */
774 	ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE;
775 #endif
776 
777 	ei_local->reset_8390 = &ax_reset_8390;
778 	ei_local->block_input = &ax_block_input;
779 	ei_local->block_output = &ax_block_output;
780 	ei_local->get_8390_hdr = &ax_get_8390_hdr;
781 	ei_local->priv = 0;
782 	ei_local->msg_enable = ax_msg_enable;
783 
784 	dev->netdev_ops = &ax_netdev_ops;
785 	dev->ethtool_ops = &ax_ethtool_ops;
786 
787 	ret = ax_mii_init(dev);
788 	if (ret)
789 		goto out_irq;
790 
791 	ax_NS8390_init(dev, 0);
792 
793 	ret = register_netdev(dev);
794 	if (ret)
795 		goto out_irq;
796 
797 	netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n",
798 		    ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr,
799 		    dev->dev_addr);
800 
801 	return 0;
802 
803  out_irq:
804 	/* cleanup irq */
805 	free_irq(dev->irq, dev);
806  err_out:
807 	return ret;
808 }
809 
810 static int ax_remove(struct platform_device *pdev)
811 {
812 	struct net_device *dev = platform_get_drvdata(pdev);
813 	struct ei_device *ei_local = netdev_priv(dev);
814 	struct ax_device *ax = to_ax_dev(dev);
815 	struct resource *mem;
816 
817 	unregister_netdev(dev);
818 	free_irq(dev->irq, dev);
819 
820 	iounmap(ei_local->mem);
821 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
822 	release_mem_region(mem->start, resource_size(mem));
823 
824 	if (ax->map2) {
825 		iounmap(ax->map2);
826 		mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
827 		release_mem_region(mem->start, resource_size(mem));
828 	}
829 
830 	free_netdev(dev);
831 
832 	return 0;
833 }
834 
835 /*
836  * ax_probe
837  *
838  * This is the entry point when the platform device system uses to
839  * notify us of a new device to attach to. Allocate memory, find the
840  * resources and information passed, and map the necessary registers.
841  */
842 static int ax_probe(struct platform_device *pdev)
843 {
844 	struct net_device *dev;
845 	struct ei_device *ei_local;
846 	struct ax_device *ax;
847 	struct resource *irq, *mem, *mem2;
848 	unsigned long mem_size, mem2_size = 0;
849 	int ret = 0;
850 
851 	dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
852 	if (dev == NULL)
853 		return -ENOMEM;
854 
855 	/* ok, let's setup our device */
856 	SET_NETDEV_DEV(dev, &pdev->dev);
857 	ei_local = netdev_priv(dev);
858 	ax = to_ax_dev(dev);
859 
860 	ax->plat = dev_get_platdata(&pdev->dev);
861 	platform_set_drvdata(pdev, dev);
862 
863 	ei_local->rxcr_base = ax->plat->rcr_val;
864 
865 	/* find the platform resources */
866 	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
867 	if (!irq) {
868 		dev_err(&pdev->dev, "no IRQ specified\n");
869 		ret = -ENXIO;
870 		goto exit_mem;
871 	}
872 
873 	dev->irq = irq->start;
874 	ax->irqflags = irq->flags & IRQF_TRIGGER_MASK;
875 
876 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
877 	if (!mem) {
878 		dev_err(&pdev->dev, "no MEM specified\n");
879 		ret = -ENXIO;
880 		goto exit_mem;
881 	}
882 
883 	mem_size = resource_size(mem);
884 
885 	/*
886 	 * setup the register offsets from either the platform data or
887 	 * by using the size of the resource provided
888 	 */
889 	if (ax->plat->reg_offsets)
890 		ei_local->reg_offset = ax->plat->reg_offsets;
891 	else {
892 		ei_local->reg_offset = ax->reg_offsets;
893 		for (ret = 0; ret < 0x18; ret++)
894 			ax->reg_offsets[ret] = (mem_size / 0x18) * ret;
895 	}
896 
897 	if (!request_mem_region(mem->start, mem_size, pdev->name)) {
898 		dev_err(&pdev->dev, "cannot reserve registers\n");
899 		ret = -ENXIO;
900 		goto exit_mem;
901 	}
902 
903 	ei_local->mem = ioremap(mem->start, mem_size);
904 	dev->base_addr = (unsigned long)ei_local->mem;
905 
906 	if (ei_local->mem == NULL) {
907 		dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem);
908 
909 		ret = -ENXIO;
910 		goto exit_req;
911 	}
912 
913 	/* look for reset area */
914 	mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
915 	if (!mem2) {
916 		if (!ax->plat->reg_offsets) {
917 			for (ret = 0; ret < 0x20; ret++)
918 				ax->reg_offsets[ret] = (mem_size / 0x20) * ret;
919 		}
920 	} else {
921 		mem2_size = resource_size(mem2);
922 
923 		if (!request_mem_region(mem2->start, mem2_size, pdev->name)) {
924 			dev_err(&pdev->dev, "cannot reserve registers\n");
925 			ret = -ENXIO;
926 			goto exit_mem1;
927 		}
928 
929 		ax->map2 = ioremap(mem2->start, mem2_size);
930 		if (!ax->map2) {
931 			dev_err(&pdev->dev, "cannot map reset register\n");
932 			ret = -ENXIO;
933 			goto exit_mem2;
934 		}
935 
936 		ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem;
937 	}
938 
939 	/* got resources, now initialise and register device */
940 	ret = ax_init_dev(dev);
941 	if (!ret)
942 		return 0;
943 
944 	if (!ax->map2)
945 		goto exit_mem1;
946 
947 	iounmap(ax->map2);
948 
949  exit_mem2:
950 	release_mem_region(mem2->start, mem2_size);
951 
952  exit_mem1:
953 	iounmap(ei_local->mem);
954 
955  exit_req:
956 	release_mem_region(mem->start, mem_size);
957 
958  exit_mem:
959 	free_netdev(dev);
960 
961 	return ret;
962 }
963 
964 /* suspend and resume */
965 
966 #ifdef CONFIG_PM
967 static int ax_suspend(struct platform_device *dev, pm_message_t state)
968 {
969 	struct net_device *ndev = platform_get_drvdata(dev);
970 	struct ax_device *ax = to_ax_dev(ndev);
971 
972 	ax->resume_open = ax->running;
973 
974 	netif_device_detach(ndev);
975 	ax_close(ndev);
976 
977 	return 0;
978 }
979 
980 static int ax_resume(struct platform_device *pdev)
981 {
982 	struct net_device *ndev = platform_get_drvdata(pdev);
983 	struct ax_device *ax = to_ax_dev(ndev);
984 
985 	ax_initial_setup(ndev, netdev_priv(ndev));
986 	ax_NS8390_init(ndev, ax->resume_open);
987 	netif_device_attach(ndev);
988 
989 	if (ax->resume_open)
990 		ax_open(ndev);
991 
992 	return 0;
993 }
994 
995 #else
996 #define ax_suspend NULL
997 #define ax_resume NULL
998 #endif
999 
1000 static struct platform_driver axdrv = {
1001 	.driver	= {
1002 		.name		= "ax88796",
1003 	},
1004 	.probe		= ax_probe,
1005 	.remove		= ax_remove,
1006 	.suspend	= ax_suspend,
1007 	.resume		= ax_resume,
1008 };
1009 
1010 module_platform_driver(axdrv);
1011 
1012 MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
1013 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
1014 MODULE_LICENSE("GPL v2");
1015 MODULE_ALIAS("platform:ax88796");
1016