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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
58static 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
79struct 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
98static 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
104void ax_NS8390_reinit(struct net_device *dev)
105{
106 ax_NS8390_init(dev, 1);
107}
108
109EXPORT_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 */
117static 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 */
146static 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 */
174static 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
186static 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 */
230static 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
267static 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
336static 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
364static 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
392static 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
407static 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
419static 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
431static 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
443static 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
451static 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
459static 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
491static 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
540static 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
562static 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
577static 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
587static 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
594static 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
601static 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
612static 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
623static 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
642static 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
660static 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 */
681static 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
814static void 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
837/*
838 * ax_probe
839 *
840 * This is the entry point when the platform device system uses to
841 * notify us of a new device to attach to. Allocate memory, find the
842 * resources and information passed, and map the necessary registers.
843 */
844static int ax_probe(struct platform_device *pdev)
845{
846 struct net_device *dev;
847 struct ei_device *ei_local;
848 struct ax_device *ax;
849 struct resource *irq, *mem, *mem2;
850 unsigned long mem_size, mem2_size = 0;
851 int ret = 0;
852
853 dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
854 if (dev == NULL)
855 return -ENOMEM;
856
857 /* ok, let's setup our device */
858 SET_NETDEV_DEV(dev, &pdev->dev);
859 ei_local = netdev_priv(dev);
860 ax = to_ax_dev(dev);
861
862 ax->plat = dev_get_platdata(&pdev->dev);
863 platform_set_drvdata(pdev, dev);
864
865 ei_local->rxcr_base = ax->plat->rcr_val;
866
867 /* find the platform resources */
868 irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
869 if (!irq) {
870 dev_err(&pdev->dev, "no IRQ specified\n");
871 ret = -ENXIO;
872 goto exit_mem;
873 }
874
875 dev->irq = irq->start;
876 ax->irqflags = irq->flags & IRQF_TRIGGER_MASK;
877
878 if (irq->flags & IORESOURCE_IRQ_SHAREABLE)
879 ax->irqflags |= IRQF_SHARED;
880
881 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
882 if (!mem) {
883 dev_err(&pdev->dev, "no MEM specified\n");
884 ret = -ENXIO;
885 goto exit_mem;
886 }
887
888 mem_size = resource_size(mem);
889
890 /*
891 * setup the register offsets from either the platform data or
892 * by using the size of the resource provided
893 */
894 if (ax->plat->reg_offsets)
895 ei_local->reg_offset = ax->plat->reg_offsets;
896 else {
897 ei_local->reg_offset = ax->reg_offsets;
898 for (ret = 0; ret < 0x18; ret++)
899 ax->reg_offsets[ret] = (mem_size / 0x18) * ret;
900 }
901
902 if (!request_mem_region(mem->start, mem_size, pdev->name)) {
903 dev_err(&pdev->dev, "cannot reserve registers\n");
904 ret = -ENXIO;
905 goto exit_mem;
906 }
907
908 ei_local->mem = ioremap(mem->start, mem_size);
909 dev->base_addr = (unsigned long)ei_local->mem;
910
911 if (ei_local->mem == NULL) {
912 dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem);
913
914 ret = -ENXIO;
915 goto exit_req;
916 }
917
918 /* look for reset area */
919 mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
920 if (!mem2) {
921 if (!ax->plat->reg_offsets) {
922 for (ret = 0; ret < 0x20; ret++)
923 ax->reg_offsets[ret] = (mem_size / 0x20) * ret;
924 }
925 } else {
926 mem2_size = resource_size(mem2);
927
928 if (!request_mem_region(mem2->start, mem2_size, pdev->name)) {
929 dev_err(&pdev->dev, "cannot reserve registers\n");
930 ret = -ENXIO;
931 goto exit_mem1;
932 }
933
934 ax->map2 = ioremap(mem2->start, mem2_size);
935 if (!ax->map2) {
936 dev_err(&pdev->dev, "cannot map reset register\n");
937 ret = -ENXIO;
938 goto exit_mem2;
939 }
940
941 ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem;
942 }
943
944 /* got resources, now initialise and register device */
945 ret = ax_init_dev(dev);
946 if (!ret)
947 return 0;
948
949 if (!ax->map2)
950 goto exit_mem1;
951
952 iounmap(ax->map2);
953
954 exit_mem2:
955 if (mem2)
956 release_mem_region(mem2->start, mem2_size);
957
958 exit_mem1:
959 iounmap(ei_local->mem);
960
961 exit_req:
962 release_mem_region(mem->start, mem_size);
963
964 exit_mem:
965 platform_set_drvdata(pdev, NULL);
966 free_netdev(dev);
967
968 return ret;
969}
970
971/* suspend and resume */
972
973#ifdef CONFIG_PM
974static int ax_suspend(struct platform_device *dev, pm_message_t state)
975{
976 struct net_device *ndev = platform_get_drvdata(dev);
977 struct ax_device *ax = to_ax_dev(ndev);
978
979 ax->resume_open = ax->running;
980
981 netif_device_detach(ndev);
982 ax_close(ndev);
983
984 return 0;
985}
986
987static int ax_resume(struct platform_device *pdev)
988{
989 struct net_device *ndev = platform_get_drvdata(pdev);
990 struct ax_device *ax = to_ax_dev(ndev);
991
992 ax_initial_setup(ndev, netdev_priv(ndev));
993 ax_NS8390_init(ndev, ax->resume_open);
994 netif_device_attach(ndev);
995
996 if (ax->resume_open)
997 ax_open(ndev);
998
999 return 0;
1000}
1001
1002#else
1003#define ax_suspend NULL
1004#define ax_resume NULL
1005#endif
1006
1007static struct platform_driver axdrv = {
1008 .driver = {
1009 .name = "ax88796",
1010 },
1011 .probe = ax_probe,
1012 .remove_new = ax_remove,
1013 .suspend = ax_suspend,
1014 .resume = ax_resume,
1015};
1016
1017module_platform_driver(axdrv);
1018
1019MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
1020MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
1021MODULE_LICENSE("GPL v2");
1022MODULE_ALIAS("platform:ax88796");