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Linux/drivers/net/ethernet/8390/ax88796.c

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

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