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