1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/net/ethernet/8390/ax88796.c
3  *
4  * Copyright 2005,2007 Simtec Electronics
5  *	Ben Dooks <ben@simtec.co.uk>
6  *
7  * Asix AX88796 10/100 Ethernet controller support
8  *	Based on ne.c, by Donald Becker, et-al.
9  */
10 
11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/errno.h>
14 #include <linux/isapnp.h>
15 #include <linux/interrupt.h>
16 #include <linux/io.h>
17 #include <linux/platform_device.h>
18 #include <linux/delay.h>
19 #include <linux/timer.h>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
22 #include <linux/ethtool.h>
23 #include <linux/mdio-bitbang.h>
24 #include <linux/phy.h>
25 #include <linux/eeprom_93cx6.h>
26 #include <linux/slab.h>
27 
28 #include <net/ax88796.h>
29 
30 
31 /* Rename the lib8390.c functions to show that they are in this driver */
32 #define __ei_open ax_ei_open
33 #define __ei_close ax_ei_close
34 #define __ei_poll ax_ei_poll
35 #define __ei_start_xmit ax_ei_start_xmit
36 #define __ei_tx_timeout ax_ei_tx_timeout
37 #define __ei_get_stats ax_ei_get_stats
38 #define __ei_set_multicast_list ax_ei_set_multicast_list
39 #define __ei_interrupt ax_ei_interrupt
40 #define ____alloc_ei_netdev ax__alloc_ei_netdev
41 #define __NS8390_init ax_NS8390_init
42 
43 /* force unsigned long back to 'void __iomem *' */
44 #define ax_convert_addr(_a) ((void __force __iomem *)(_a))
45 
46 #define ei_inb(_a) readb(ax_convert_addr(_a))
47 #define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))
48 
49 #define ei_inb_p(_a) ei_inb(_a)
50 #define ei_outb_p(_v, _a) ei_outb(_v, _a)
51 
52 /* define EI_SHIFT() to take into account our register offsets */
53 #define EI_SHIFT(x) (ei_local->reg_offset[(x)])
54 
55 /* Ensure we have our RCR base value */
56 #define AX88796_PLATFORM
57 
58 static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";
59 
60 #include "lib8390.c"
61 
62 #define DRV_NAME "ax88796"
63 #define DRV_VERSION "1.00"
64 
65 /* from ne.c */
66 #define NE_CMD		EI_SHIFT(0x00)
67 #define NE_RESET	EI_SHIFT(0x1f)
68 #define NE_DATAPORT	EI_SHIFT(0x10)
69 
70 #define NE1SM_START_PG	0x20	/* First page of TX buffer */
71 #define NE1SM_STOP_PG	0x40	/* Last page +1 of RX ring */
72 #define NESM_START_PG	0x40	/* First page of TX buffer */
73 #define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */
74 
75 #define AX_GPOC_PPDSET	BIT(6)
76 
77 /* device private data */
78 
79 struct ax_device {
80 	struct mii_bus *mii_bus;
81 	struct mdiobb_ctrl bb_ctrl;
82 	void __iomem *addr_memr;
83 	u8 reg_memr;
84 	int link;
85 	int speed;
86 	int duplex;
87 
88 	void __iomem *map2;
89 	const struct ax_plat_data *plat;
90 
91 	unsigned char running;
92 	unsigned char resume_open;
93 	unsigned int irqflags;
94 
95 	u32 reg_offsets[0x20];
96 };
97 
98 static inline struct ax_device *to_ax_dev(struct net_device *dev)
99 {
100 	struct ei_device *ei_local = netdev_priv(dev);
101 	return (struct ax_device *)(ei_local + 1);
102 }
103 
104 void ax_NS8390_reinit(struct net_device *dev)
105 {
106 	ax_NS8390_init(dev, 1);
107 }
108 
109 EXPORT_SYMBOL_GPL(ax_NS8390_reinit);
110 
111 /*
112  * ax_initial_check
113  *
114  * do an initial probe for the card to check whether it exists
115  * and is functional
116  */
117 static int ax_initial_check(struct net_device *dev)
118 {
119 	struct ei_device *ei_local = netdev_priv(dev);
120 	void __iomem *ioaddr = ei_local->mem;
121 	int reg0;
122 	int regd;
123 
124 	reg0 = ei_inb(ioaddr);
125 	if (reg0 == 0xFF)
126 		return -ENODEV;
127 
128 	ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD);
129 	regd = ei_inb(ioaddr + 0x0d);
130 	ei_outb(0xff, ioaddr + 0x0d);
131 	ei_outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD);
132 	ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
133 	if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
134 		ei_outb(reg0, ioaddr);
135 		ei_outb(regd, ioaddr + 0x0d);	/* Restore the old values. */
136 		return -ENODEV;
137 	}
138 
139 	return 0;
140 }
141 
142 /*
143  * Hard reset the card. This used to pause for the same period that a
144  * 8390 reset command required, but that shouldn't be necessary.
145  */
146 static void ax_reset_8390(struct net_device *dev)
147 {
148 	struct ei_device *ei_local = netdev_priv(dev);
149 	unsigned long reset_start_time = jiffies;
150 	void __iomem *addr = (void __iomem *)dev->base_addr;
151 
152 	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
153 
154 	ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
155 
156 	ei_local->txing = 0;
157 	ei_local->dmaing = 0;
158 
159 	/* This check _should_not_ be necessary, omit eventually. */
160 	while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
161 		if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
162 			netdev_warn(dev, "%s: did not complete.\n", __func__);
163 			break;
164 		}
165 	}
166 
167 	ei_outb(ENISR_RESET, addr + EN0_ISR);	/* Ack intr. */
168 }
169 
170 /* Wrapper for __ei_interrupt for platforms that have a platform-specific
171  * way to find out whether the interrupt request might be caused by
172  * the ax88796 chip.
173  */
174 static irqreturn_t ax_ei_interrupt_filtered(int irq, void *dev_id)
175 {
176 	struct net_device *dev = dev_id;
177 	struct ax_device *ax = to_ax_dev(dev);
178 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
179 
180 	if (!ax->plat->check_irq(pdev))
181 		return IRQ_NONE;
182 
183 	return ax_ei_interrupt(irq, dev_id);
184 }
185 
186 static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
187 			    int ring_page)
188 {
189 	struct ei_device *ei_local = netdev_priv(dev);
190 	void __iomem *nic_base = ei_local->mem;
191 
192 	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
193 	if (ei_local->dmaing) {
194 		netdev_err(dev, "DMAing conflict in %s "
195 			"[DMAstat:%d][irqlock:%d].\n",
196 			__func__,
197 			ei_local->dmaing, ei_local->irqlock);
198 		return;
199 	}
200 
201 	ei_local->dmaing |= 0x01;
202 	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
203 	ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
204 	ei_outb(0, nic_base + EN0_RCNTHI);
205 	ei_outb(0, nic_base + EN0_RSARLO);		/* On page boundary */
206 	ei_outb(ring_page, nic_base + EN0_RSARHI);
207 	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
208 
209 	if (ei_local->word16)
210 		ioread16_rep(nic_base + NE_DATAPORT, hdr,
211 			     sizeof(struct e8390_pkt_hdr) >> 1);
212 	else
213 		ioread8_rep(nic_base + NE_DATAPORT, hdr,
214 			    sizeof(struct e8390_pkt_hdr));
215 
216 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
217 	ei_local->dmaing &= ~0x01;
218 
219 	le16_to_cpus(&hdr->count);
220 }
221 
222 
223 /*
224  * Block input and output, similar to the Crynwr packet driver. If
225  * you are porting to a new ethercard, look at the packet driver
226  * source for hints. The NEx000 doesn't share the on-board packet
227  * memory -- you have to put the packet out through the "remote DMA"
228  * dataport using ei_outb.
229  */
230 static void ax_block_input(struct net_device *dev, int count,
231 			   struct sk_buff *skb, int ring_offset)
232 {
233 	struct ei_device *ei_local = netdev_priv(dev);
234 	void __iomem *nic_base = ei_local->mem;
235 	char *buf = skb->data;
236 
237 	if (ei_local->dmaing) {
238 		netdev_err(dev,
239 			"DMAing conflict in %s "
240 			"[DMAstat:%d][irqlock:%d].\n",
241 			__func__,
242 			ei_local->dmaing, ei_local->irqlock);
243 		return;
244 	}
245 
246 	ei_local->dmaing |= 0x01;
247 
248 	ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + NE_CMD);
249 	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
250 	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
251 	ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
252 	ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
253 	ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
254 
255 	if (ei_local->word16) {
256 		ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
257 		if (count & 0x01)
258 			buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
259 
260 	} else {
261 		ioread8_rep(nic_base + NE_DATAPORT, buf, count);
262 	}
263 
264 	ei_local->dmaing &= ~1;
265 }
266 
267 static void ax_block_output(struct net_device *dev, int count,
268 			    const unsigned char *buf, const int start_page)
269 {
270 	struct ei_device *ei_local = netdev_priv(dev);
271 	void __iomem *nic_base = ei_local->mem;
272 	unsigned long dma_start;
273 
274 	/*
275 	 * Round the count up for word writes. Do we need to do this?
276 	 * What effect will an odd byte count have on the 8390?  I
277 	 * should check someday.
278 	 */
279 	if (ei_local->word16 && (count & 0x01))
280 		count++;
281 
282 	/* This *shouldn't* happen. If it does, it's the last thing you'll see */
283 	if (ei_local->dmaing) {
284 		netdev_err(dev, "DMAing conflict in %s."
285 			"[DMAstat:%d][irqlock:%d]\n",
286 			__func__,
287 		       ei_local->dmaing, ei_local->irqlock);
288 		return;
289 	}
290 
291 	ei_local->dmaing |= 0x01;
292 	/* We should already be in page 0, but to be safe... */
293 	ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
294 
295 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);
296 
297 	/* Now the normal output. */
298 	ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
299 	ei_outb(count >> 8, nic_base + EN0_RCNTHI);
300 	ei_outb(0x00, nic_base + EN0_RSARLO);
301 	ei_outb(start_page, nic_base + EN0_RSARHI);
302 
303 	ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
304 	if (ei_local->word16)
305 		iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
306 	else
307 		iowrite8_rep(nic_base + NE_DATAPORT, buf, count);
308 
309 	dma_start = jiffies;
310 
311 	while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
312 		if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
313 			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
314 			ax_reset_8390(dev);
315 			ax_NS8390_init(dev, 1);
316 			break;
317 		}
318 	}
319 
320 	ei_outb(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
321 	ei_local->dmaing &= ~0x01;
322 }
323 
324 /* definitions for accessing MII/EEPROM interface */
325 
326 #define AX_MEMR			EI_SHIFT(0x14)
327 #define AX_MEMR_MDC		BIT(0)
328 #define AX_MEMR_MDIR		BIT(1)
329 #define AX_MEMR_MDI		BIT(2)
330 #define AX_MEMR_MDO		BIT(3)
331 #define AX_MEMR_EECS		BIT(4)
332 #define AX_MEMR_EEI		BIT(5)
333 #define AX_MEMR_EEO		BIT(6)
334 #define AX_MEMR_EECLK		BIT(7)
335 
336 static void ax_handle_link_change(struct net_device *dev)
337 {
338 	struct ax_device  *ax = to_ax_dev(dev);
339 	struct phy_device *phy_dev = dev->phydev;
340 	int status_change = 0;
341 
342 	if (phy_dev->link && ((ax->speed != phy_dev->speed) ||
343 			     (ax->duplex != phy_dev->duplex))) {
344 
345 		ax->speed = phy_dev->speed;
346 		ax->duplex = phy_dev->duplex;
347 		status_change = 1;
348 	}
349 
350 	if (phy_dev->link != ax->link) {
351 		if (!phy_dev->link) {
352 			ax->speed = 0;
353 			ax->duplex = -1;
354 		}
355 		ax->link = phy_dev->link;
356 
357 		status_change = 1;
358 	}
359 
360 	if (status_change)
361 		phy_print_status(phy_dev);
362 }
363 
364 static int ax_mii_probe(struct net_device *dev)
365 {
366 	struct ax_device  *ax = to_ax_dev(dev);
367 	struct phy_device *phy_dev = NULL;
368 	int ret;
369 
370 	/* find the first phy */
371 	phy_dev = phy_find_first(ax->mii_bus);
372 	if (!phy_dev) {
373 		netdev_err(dev, "no PHY found\n");
374 		return -ENODEV;
375 	}
376 
377 	ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change,
378 				 PHY_INTERFACE_MODE_MII);
379 	if (ret) {
380 		netdev_err(dev, "Could not attach to PHY\n");
381 		return ret;
382 	}
383 
384 	phy_set_max_speed(phy_dev, SPEED_100);
385 
386 	netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
387 		    phy_dev->drv->name, phydev_name(phy_dev), phy_dev->irq);
388 
389 	return 0;
390 }
391 
392 static void ax_phy_switch(struct net_device *dev, int on)
393 {
394 	struct ei_device *ei_local = netdev_priv(dev);
395 	struct ax_device *ax = to_ax_dev(dev);
396 
397 	u8 reg_gpoc =  ax->plat->gpoc_val;
398 
399 	if (!!on)
400 		reg_gpoc &= ~AX_GPOC_PPDSET;
401 	else
402 		reg_gpoc |= AX_GPOC_PPDSET;
403 
404 	ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17));
405 }
406 
407 static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level)
408 {
409 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
410 
411 	if (level)
412 		ax->reg_memr |= AX_MEMR_MDC;
413 	else
414 		ax->reg_memr &= ~AX_MEMR_MDC;
415 
416 	ei_outb(ax->reg_memr, ax->addr_memr);
417 }
418 
419 static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output)
420 {
421 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
422 
423 	if (output)
424 		ax->reg_memr &= ~AX_MEMR_MDIR;
425 	else
426 		ax->reg_memr |= AX_MEMR_MDIR;
427 
428 	ei_outb(ax->reg_memr, ax->addr_memr);
429 }
430 
431 static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value)
432 {
433 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
434 
435 	if (value)
436 		ax->reg_memr |= AX_MEMR_MDO;
437 	else
438 		ax->reg_memr &= ~AX_MEMR_MDO;
439 
440 	ei_outb(ax->reg_memr, ax->addr_memr);
441 }
442 
443 static int ax_bb_get_data(struct mdiobb_ctrl *ctrl)
444 {
445 	struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
446 	int reg_memr = ei_inb(ax->addr_memr);
447 
448 	return reg_memr & AX_MEMR_MDI ? 1 : 0;
449 }
450 
451 static const struct mdiobb_ops bb_ops = {
452 	.owner = THIS_MODULE,
453 	.set_mdc = ax_bb_mdc,
454 	.set_mdio_dir = ax_bb_dir,
455 	.set_mdio_data = ax_bb_set_data,
456 	.get_mdio_data = ax_bb_get_data,
457 };
458 
459 static int ax_mii_init(struct net_device *dev)
460 {
461 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
462 	struct ei_device *ei_local = netdev_priv(dev);
463 	struct ax_device *ax = to_ax_dev(dev);
464 	int err;
465 
466 	ax->bb_ctrl.ops = &bb_ops;
467 	ax->addr_memr = ei_local->mem + AX_MEMR;
468 	ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl);
469 	if (!ax->mii_bus) {
470 		err = -ENOMEM;
471 		goto out;
472 	}
473 
474 	ax->mii_bus->name = "ax88796_mii_bus";
475 	ax->mii_bus->parent = dev->dev.parent;
476 	snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
477 		 pdev->name, pdev->id);
478 
479 	err = mdiobus_register(ax->mii_bus);
480 	if (err)
481 		goto out_free_mdio_bitbang;
482 
483 	return 0;
484 
485  out_free_mdio_bitbang:
486 	free_mdio_bitbang(ax->mii_bus);
487  out:
488 	return err;
489 }
490 
491 static int ax_open(struct net_device *dev)
492 {
493 	struct ax_device *ax = to_ax_dev(dev);
494 	int ret;
495 
496 	netdev_dbg(dev, "open\n");
497 
498 	ret = ax_mii_init(dev);
499 	if (ret)
500 		goto failed_mii;
501 
502 	if (ax->plat->check_irq)
503 		ret = request_irq(dev->irq, ax_ei_interrupt_filtered,
504 				  ax->irqflags, dev->name, dev);
505 	else
506 		ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
507 				  dev->name, dev);
508 	if (ret)
509 		goto failed_request_irq;
510 
511 	/* turn the phy on (if turned off) */
512 	ax_phy_switch(dev, 1);
513 
514 	ret = ax_mii_probe(dev);
515 	if (ret)
516 		goto failed_mii_probe;
517 	phy_start(dev->phydev);
518 
519 	ret = ax_ei_open(dev);
520 	if (ret)
521 		goto failed_ax_ei_open;
522 
523 	ax->running = 1;
524 
525 	return 0;
526 
527  failed_ax_ei_open:
528 	phy_disconnect(dev->phydev);
529  failed_mii_probe:
530 	ax_phy_switch(dev, 0);
531 	free_irq(dev->irq, dev);
532  failed_request_irq:
533 	/* unregister mdiobus */
534 	mdiobus_unregister(ax->mii_bus);
535 	free_mdio_bitbang(ax->mii_bus);
536  failed_mii:
537 	return ret;
538 }
539 
540 static int ax_close(struct net_device *dev)
541 {
542 	struct ax_device *ax = to_ax_dev(dev);
543 
544 	netdev_dbg(dev, "close\n");
545 
546 	ax->running = 0;
547 	wmb();
548 
549 	ax_ei_close(dev);
550 
551 	/* turn the phy off */
552 	ax_phy_switch(dev, 0);
553 	phy_disconnect(dev->phydev);
554 
555 	free_irq(dev->irq, dev);
556 
557 	mdiobus_unregister(ax->mii_bus);
558 	free_mdio_bitbang(ax->mii_bus);
559 	return 0;
560 }
561 
562 static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
563 {
564 	struct phy_device *phy_dev = dev->phydev;
565 
566 	if (!netif_running(dev))
567 		return -EINVAL;
568 
569 	if (!phy_dev)
570 		return -ENODEV;
571 
572 	return phy_mii_ioctl(phy_dev, req, cmd);
573 }
574 
575 /* ethtool ops */
576 
577 static void ax_get_drvinfo(struct net_device *dev,
578 			   struct ethtool_drvinfo *info)
579 {
580 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
581 
582 	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
583 	strscpy(info->version, DRV_VERSION, sizeof(info->version));
584 	strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
585 }
586 
587 static u32 ax_get_msglevel(struct net_device *dev)
588 {
589 	struct ei_device *ei_local = netdev_priv(dev);
590 
591 	return ei_local->msg_enable;
592 }
593 
594 static void ax_set_msglevel(struct net_device *dev, u32 v)
595 {
596 	struct ei_device *ei_local = netdev_priv(dev);
597 
598 	ei_local->msg_enable = v;
599 }
600 
601 static const struct ethtool_ops ax_ethtool_ops = {
602 	.get_drvinfo		= ax_get_drvinfo,
603 	.get_link		= ethtool_op_get_link,
604 	.get_ts_info		= ethtool_op_get_ts_info,
605 	.get_msglevel		= ax_get_msglevel,
606 	.set_msglevel		= ax_set_msglevel,
607 	.get_link_ksettings	= phy_ethtool_get_link_ksettings,
608 	.set_link_ksettings	= phy_ethtool_set_link_ksettings,
609 };
610 
611 #ifdef CONFIG_AX88796_93CX6
612 static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
613 {
614 	struct ei_device *ei_local = eeprom->data;
615 	u8 reg = ei_inb(ei_local->mem + AX_MEMR);
616 
617 	eeprom->reg_data_in = reg & AX_MEMR_EEI;
618 	eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
619 	eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
620 	eeprom->reg_chip_select = reg & AX_MEMR_EECS;
621 }
622 
623 static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
624 {
625 	struct ei_device *ei_local = eeprom->data;
626 	u8 reg = ei_inb(ei_local->mem + AX_MEMR);
627 
628 	reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
629 
630 	if (eeprom->reg_data_in)
631 		reg |= AX_MEMR_EEI;
632 	if (eeprom->reg_data_clock)
633 		reg |= AX_MEMR_EECLK;
634 	if (eeprom->reg_chip_select)
635 		reg |= AX_MEMR_EECS;
636 
637 	ei_outb(reg, ei_local->mem + AX_MEMR);
638 	udelay(10);
639 }
640 #endif
641 
642 static const struct net_device_ops ax_netdev_ops = {
643 	.ndo_open		= ax_open,
644 	.ndo_stop		= ax_close,
645 	.ndo_eth_ioctl		= ax_ioctl,
646 
647 	.ndo_start_xmit		= ax_ei_start_xmit,
648 	.ndo_tx_timeout		= ax_ei_tx_timeout,
649 	.ndo_get_stats		= ax_ei_get_stats,
650 	.ndo_set_rx_mode	= ax_ei_set_multicast_list,
651 	.ndo_validate_addr	= eth_validate_addr,
652 	.ndo_set_mac_address	= eth_mac_addr,
653 #ifdef CONFIG_NET_POLL_CONTROLLER
654 	.ndo_poll_controller	= ax_ei_poll,
655 #endif
656 };
657 
658 /* setup code */
659 
660 static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
661 {
662 	void __iomem *ioaddr = ei_local->mem;
663 	struct ax_device *ax = to_ax_dev(dev);
664 
665 	/* Select page 0 */
666 	ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_STOP, ioaddr + E8390_CMD);
667 
668 	/* set to byte access */
669 	ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
670 	ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
671 }
672 
673 /*
674  * ax_init_dev
675  *
676  * initialise the specified device, taking care to note the MAC
677  * address it may already have (if configured), ensure
678  * the device is ready to be used by lib8390.c and registerd with
679  * the network layer.
680  */
681 static int ax_init_dev(struct net_device *dev)
682 {
683 	struct ei_device *ei_local = netdev_priv(dev);
684 	struct ax_device *ax = to_ax_dev(dev);
685 	void __iomem *ioaddr = ei_local->mem;
686 	unsigned int start_page;
687 	unsigned int stop_page;
688 	int ret;
689 	int i;
690 
691 	ret = ax_initial_check(dev);
692 	if (ret)
693 		goto err_out;
694 
695 	/* setup goes here */
696 
697 	ax_initial_setup(dev, ei_local);
698 
699 	/* read the mac from the card prom if we need it */
700 
701 	if (ax->plat->flags & AXFLG_HAS_EEPROM) {
702 		unsigned char SA_prom[32];
703 
704 		ei_outb(6, ioaddr + EN0_RCNTLO);
705 		ei_outb(0, ioaddr + EN0_RCNTHI);
706 		ei_outb(0, ioaddr + EN0_RSARLO);
707 		ei_outb(0, ioaddr + EN0_RSARHI);
708 		ei_outb(E8390_RREAD + E8390_START, ioaddr + NE_CMD);
709 		for (i = 0; i < sizeof(SA_prom); i += 2) {
710 			SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
711 			SA_prom[i + 1] = ei_inb(ioaddr + NE_DATAPORT);
712 		}
713 		ei_outb(ENISR_RDC, ioaddr + EN0_ISR);	/* Ack intr. */
714 
715 		if (ax->plat->wordlength == 2)
716 			for (i = 0; i < 16; i++)
717 				SA_prom[i] = SA_prom[i+i];
718 
719 		eth_hw_addr_set(dev, SA_prom);
720 	}
721 
722 #ifdef CONFIG_AX88796_93CX6
723 	if (ax->plat->flags & AXFLG_HAS_93CX6) {
724 		unsigned char mac_addr[ETH_ALEN];
725 		struct eeprom_93cx6 eeprom;
726 
727 		eeprom.data = ei_local;
728 		eeprom.register_read = ax_eeprom_register_read;
729 		eeprom.register_write = ax_eeprom_register_write;
730 		eeprom.width = PCI_EEPROM_WIDTH_93C56;
731 
732 		eeprom_93cx6_multiread(&eeprom, 0,
733 				       (__le16 __force *)mac_addr,
734 				       sizeof(mac_addr) >> 1);
735 
736 		eth_hw_addr_set(dev, mac_addr);
737 	}
738 #endif
739 	if (ax->plat->wordlength == 2) {
740 		/* We must set the 8390 for word mode. */
741 		ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
742 		start_page = NESM_START_PG;
743 		stop_page = NESM_STOP_PG;
744 	} else {
745 		start_page = NE1SM_START_PG;
746 		stop_page = NE1SM_STOP_PG;
747 	}
748 
749 	/* load the mac-address from the device */
750 	if (ax->plat->flags & AXFLG_MAC_FROMDEV) {
751 		u8 addr[ETH_ALEN];
752 
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 			addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
757 		eth_hw_addr_set(dev, addr);
758 	}
759 
760 	if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
761 	    ax->plat->mac_addr)
762 		eth_hw_addr_set(dev, ax->plat->mac_addr);
763 
764 	if (!is_valid_ether_addr(dev->dev_addr)) {
765 		eth_hw_addr_random(dev);
766 		dev_info(&dev->dev, "Using random MAC address: %pM\n",
767 			 dev->dev_addr);
768 	}
769 
770 	ax_reset_8390(dev);
771 
772 	ei_local->name = "AX88796";
773 	ei_local->tx_start_page = start_page;
774 	ei_local->stop_page = stop_page;
775 	ei_local->word16 = (ax->plat->wordlength == 2);
776 	ei_local->rx_start_page = start_page + TX_PAGES;
777 
778 #ifdef PACKETBUF_MEMSIZE
779 	/* Allow the packet buffer size to be overridden by know-it-alls. */
780 	ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE;
781 #endif
782 
783 	ei_local->reset_8390 = &ax_reset_8390;
784 	if (ax->plat->block_input)
785 		ei_local->block_input = ax->plat->block_input;
786 	else
787 		ei_local->block_input = &ax_block_input;
788 	if (ax->plat->block_output)
789 		ei_local->block_output = ax->plat->block_output;
790 	else
791 		ei_local->block_output = &ax_block_output;
792 	ei_local->get_8390_hdr = &ax_get_8390_hdr;
793 	ei_local->priv = 0;
794 
795 	dev->netdev_ops = &ax_netdev_ops;
796 	dev->ethtool_ops = &ax_ethtool_ops;
797 
798 	ax_NS8390_init(dev, 0);
799 
800 	ret = register_netdev(dev);
801 	if (ret)
802 		goto err_out;
803 
804 	netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n",
805 		    ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr,
806 		    dev->dev_addr);
807 
808 	return 0;
809 
810  err_out:
811 	return ret;
812 }
813 
814 static int ax_remove(struct platform_device *pdev)
815 {
816 	struct net_device *dev = platform_get_drvdata(pdev);
817 	struct ei_device *ei_local = netdev_priv(dev);
818 	struct ax_device *ax = to_ax_dev(dev);
819 	struct resource *mem;
820 
821 	unregister_netdev(dev);
822 
823 	iounmap(ei_local->mem);
824 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
825 	release_mem_region(mem->start, resource_size(mem));
826 
827 	if (ax->map2) {
828 		iounmap(ax->map2);
829 		mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
830 		release_mem_region(mem->start, resource_size(mem));
831 	}
832 
833 	platform_set_drvdata(pdev, NULL);
834 	free_netdev(dev);
835 
836 	return 0;
837 }
838 
839 /*
840  * ax_probe
841  *
842  * This is the entry point when the platform device system uses to
843  * notify us of a new device to attach to. Allocate memory, find the
844  * resources and information passed, and map the necessary registers.
845  */
846 static int ax_probe(struct platform_device *pdev)
847 {
848 	struct net_device *dev;
849 	struct ei_device *ei_local;
850 	struct ax_device *ax;
851 	struct resource *irq, *mem, *mem2;
852 	unsigned long mem_size, mem2_size = 0;
853 	int ret = 0;
854 
855 	dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
856 	if (dev == NULL)
857 		return -ENOMEM;
858 
859 	/* ok, let's setup our device */
860 	SET_NETDEV_DEV(dev, &pdev->dev);
861 	ei_local = netdev_priv(dev);
862 	ax = to_ax_dev(dev);
863 
864 	ax->plat = dev_get_platdata(&pdev->dev);
865 	platform_set_drvdata(pdev, dev);
866 
867 	ei_local->rxcr_base = ax->plat->rcr_val;
868 
869 	/* find the platform resources */
870 	irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
871 	if (!irq) {
872 		dev_err(&pdev->dev, "no IRQ specified\n");
873 		ret = -ENXIO;
874 		goto exit_mem;
875 	}
876 
877 	dev->irq = irq->start;
878 	ax->irqflags = irq->flags & IRQF_TRIGGER_MASK;
879 
880 	if (irq->flags &  IORESOURCE_IRQ_SHAREABLE)
881 		ax->irqflags |= IRQF_SHARED;
882 
883 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
884 	if (!mem) {
885 		dev_err(&pdev->dev, "no MEM specified\n");
886 		ret = -ENXIO;
887 		goto exit_mem;
888 	}
889 
890 	mem_size = resource_size(mem);
891 
892 	/*
893 	 * setup the register offsets from either the platform data or
894 	 * by using the size of the resource provided
895 	 */
896 	if (ax->plat->reg_offsets)
897 		ei_local->reg_offset = ax->plat->reg_offsets;
898 	else {
899 		ei_local->reg_offset = ax->reg_offsets;
900 		for (ret = 0; ret < 0x18; ret++)
901 			ax->reg_offsets[ret] = (mem_size / 0x18) * ret;
902 	}
903 
904 	if (!request_mem_region(mem->start, mem_size, pdev->name)) {
905 		dev_err(&pdev->dev, "cannot reserve registers\n");
906 		ret = -ENXIO;
907 		goto exit_mem;
908 	}
909 
910 	ei_local->mem = ioremap(mem->start, mem_size);
911 	dev->base_addr = (unsigned long)ei_local->mem;
912 
913 	if (ei_local->mem == NULL) {
914 		dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem);
915 
916 		ret = -ENXIO;
917 		goto exit_req;
918 	}
919 
920 	/* look for reset area */
921 	mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
922 	if (!mem2) {
923 		if (!ax->plat->reg_offsets) {
924 			for (ret = 0; ret < 0x20; ret++)
925 				ax->reg_offsets[ret] = (mem_size / 0x20) * ret;
926 		}
927 	} else {
928 		mem2_size = resource_size(mem2);
929 
930 		if (!request_mem_region(mem2->start, mem2_size, pdev->name)) {
931 			dev_err(&pdev->dev, "cannot reserve registers\n");
932 			ret = -ENXIO;
933 			goto exit_mem1;
934 		}
935 
936 		ax->map2 = ioremap(mem2->start, mem2_size);
937 		if (!ax->map2) {
938 			dev_err(&pdev->dev, "cannot map reset register\n");
939 			ret = -ENXIO;
940 			goto exit_mem2;
941 		}
942 
943 		ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem;
944 	}
945 
946 	/* got resources, now initialise and register device */
947 	ret = ax_init_dev(dev);
948 	if (!ret)
949 		return 0;
950 
951 	if (!ax->map2)
952 		goto exit_mem1;
953 
954 	iounmap(ax->map2);
955 
956  exit_mem2:
957 	if (mem2)
958 		release_mem_region(mem2->start, mem2_size);
959 
960  exit_mem1:
961 	iounmap(ei_local->mem);
962 
963  exit_req:
964 	release_mem_region(mem->start, mem_size);
965 
966  exit_mem:
967 	platform_set_drvdata(pdev, NULL);
968 	free_netdev(dev);
969 
970 	return ret;
971 }
972 
973 /* suspend and resume */
974 
975 #ifdef CONFIG_PM
976 static int ax_suspend(struct platform_device *dev, pm_message_t state)
977 {
978 	struct net_device *ndev = platform_get_drvdata(dev);
979 	struct ax_device *ax = to_ax_dev(ndev);
980 
981 	ax->resume_open = ax->running;
982 
983 	netif_device_detach(ndev);
984 	ax_close(ndev);
985 
986 	return 0;
987 }
988 
989 static int ax_resume(struct platform_device *pdev)
990 {
991 	struct net_device *ndev = platform_get_drvdata(pdev);
992 	struct ax_device *ax = to_ax_dev(ndev);
993 
994 	ax_initial_setup(ndev, netdev_priv(ndev));
995 	ax_NS8390_init(ndev, ax->resume_open);
996 	netif_device_attach(ndev);
997 
998 	if (ax->resume_open)
999 		ax_open(ndev);
1000 
1001 	return 0;
1002 }
1003 
1004 #else
1005 #define ax_suspend NULL
1006 #define ax_resume NULL
1007 #endif
1008 
1009 static struct platform_driver axdrv = {
1010 	.driver	= {
1011 		.name		= "ax88796",
1012 	},
1013 	.probe		= ax_probe,
1014 	.remove		= ax_remove,
1015 	.suspend	= ax_suspend,
1016 	.resume		= ax_resume,
1017 };
1018 
1019 module_platform_driver(axdrv);
1020 
1021 MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
1022 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
1023 MODULE_LICENSE("GPL v2");
1024 MODULE_ALIAS("platform:ax88796");
1025