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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         void __iomem *addr_memr;
 88         u8 reg_memr;
 89         int link;
 90         int speed;
 91         int duplex;
 92 
 93         void __iomem *map2;
 94         const struct ax_plat_data *plat;
 95 
 96         unsigned char running;
 97         unsigned char resume_open;
 98         unsigned int irqflags;
 99 
100         u32 reg_offsets[0x20];
101 };
102 
103 static inline struct ax_device *to_ax_dev(struct net_device *dev)
104 {
105         struct ei_device *ei_local = netdev_priv(dev);
106         return (struct ax_device *)(ei_local + 1);
107 }
108 
109 /*
110  * ax_initial_check
111  *
112  * do an initial probe for the card to check whether it exists
113  * and is functional
114  */
115 static int ax_initial_check(struct net_device *dev)
116 {
117         struct ei_device *ei_local = netdev_priv(dev);
118         void __iomem *ioaddr = ei_local->mem;
119         int reg0;
120         int regd;
121 
122         reg0 = ei_inb(ioaddr);
123         if (reg0 == 0xFF)
124                 return -ENODEV;
125 
126         ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, ioaddr + E8390_CMD);
127         regd = ei_inb(ioaddr + 0x0d);
128         ei_outb(0xff, ioaddr + 0x0d);
129         ei_outb(E8390_NODMA + E8390_PAGE0, ioaddr + E8390_CMD);
130         ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
131         if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
132                 ei_outb(reg0, ioaddr);
133                 ei_outb(regd, ioaddr + 0x0d);   /* Restore the old values. */
134                 return -ENODEV;
135         }
136 
137         return 0;
138 }
139 
140 /*
141  * Hard reset the card. This used to pause for the same period that a
142  * 8390 reset command required, but that shouldn't be necessary.
143  */
144 static void ax_reset_8390(struct net_device *dev)
145 {
146         struct ei_device *ei_local = netdev_priv(dev);
147         unsigned long reset_start_time = jiffies;
148         void __iomem *addr = (void __iomem *)dev->base_addr;
149 
150         netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
151 
152         ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
153 
154         ei_local->txing = 0;
155         ei_local->dmaing = 0;
156 
157         /* This check _should_not_ be necessary, omit eventually. */
158         while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
159                 if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
160                         netdev_warn(dev, "%s: did not complete.\n", __func__);
161                         break;
162                 }
163         }
164 
165         ei_outb(ENISR_RESET, addr + EN0_ISR);   /* Ack intr. */
166 }
167 
168 
169 static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
170                             int ring_page)
171 {
172         struct ei_device *ei_local = netdev_priv(dev);
173         void __iomem *nic_base = ei_local->mem;
174 
175         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
176         if (ei_local->dmaing) {
177                 netdev_err(dev, "DMAing conflict in %s "
178                         "[DMAstat:%d][irqlock:%d].\n",
179                         __func__,
180                         ei_local->dmaing, ei_local->irqlock);
181                 return;
182         }
183 
184         ei_local->dmaing |= 0x01;
185         ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_START, nic_base + NE_CMD);
186         ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
187         ei_outb(0, nic_base + EN0_RCNTHI);
188         ei_outb(0, nic_base + EN0_RSARLO);              /* On page boundary */
189         ei_outb(ring_page, nic_base + EN0_RSARHI);
190         ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
191 
192         if (ei_local->word16)
193                 ioread16_rep(nic_base + NE_DATAPORT, hdr,
194                              sizeof(struct e8390_pkt_hdr) >> 1);
195         else
196                 ioread8_rep(nic_base + NE_DATAPORT, hdr,
197                             sizeof(struct e8390_pkt_hdr));
198 
199         ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
200         ei_local->dmaing &= ~0x01;
201 
202         le16_to_cpus(&hdr->count);
203 }
204 
205 
206 /*
207  * Block input and output, similar to the Crynwr packet driver. If
208  * you are porting to a new ethercard, look at the packet driver
209  * source for hints. The NEx000 doesn't share the on-board packet
210  * memory -- you have to put the packet out through the "remote DMA"
211  * dataport using ei_outb.
212  */
213 static void ax_block_input(struct net_device *dev, int count,
214                            struct sk_buff *skb, int ring_offset)
215 {
216         struct ei_device *ei_local = netdev_priv(dev);
217         void __iomem *nic_base = ei_local->mem;
218         char *buf = skb->data;
219 
220         if (ei_local->dmaing) {
221                 netdev_err(dev,
222                         "DMAing conflict in %s "
223                         "[DMAstat:%d][irqlock:%d].\n",
224                         __func__,
225                         ei_local->dmaing, ei_local->irqlock);
226                 return;
227         }
228 
229         ei_local->dmaing |= 0x01;
230 
231         ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base + NE_CMD);
232         ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
233         ei_outb(count >> 8, nic_base + EN0_RCNTHI);
234         ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
235         ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
236         ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
237 
238         if (ei_local->word16) {
239                 ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
240                 if (count & 0x01)
241                         buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
242 
243         } else {
244                 ioread8_rep(nic_base + NE_DATAPORT, buf, count);
245         }
246 
247         ei_local->dmaing &= ~1;
248 }
249 
250 static void ax_block_output(struct net_device *dev, int count,
251                             const unsigned char *buf, const int start_page)
252 {
253         struct ei_device *ei_local = netdev_priv(dev);
254         void __iomem *nic_base = ei_local->mem;
255         unsigned long dma_start;
256 
257         /*
258          * Round the count up for word writes. Do we need to do this?
259          * What effect will an odd byte count have on the 8390?  I
260          * should check someday.
261          */
262         if (ei_local->word16 && (count & 0x01))
263                 count++;
264 
265         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
266         if (ei_local->dmaing) {
267                 netdev_err(dev, "DMAing conflict in %s."
268                         "[DMAstat:%d][irqlock:%d]\n",
269                         __func__,
270                        ei_local->dmaing, ei_local->irqlock);
271                 return;
272         }
273 
274         ei_local->dmaing |= 0x01;
275         /* We should already be in page 0, but to be safe... */
276         ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
277 
278         ei_outb(ENISR_RDC, nic_base + EN0_ISR);
279 
280         /* Now the normal output. */
281         ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
282         ei_outb(count >> 8, nic_base + EN0_RCNTHI);
283         ei_outb(0x00, nic_base + EN0_RSARLO);
284         ei_outb(start_page, nic_base + EN0_RSARHI);
285 
286         ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
287         if (ei_local->word16)
288                 iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
289         else
290                 iowrite8_rep(nic_base + NE_DATAPORT, buf, count);
291 
292         dma_start = jiffies;
293 
294         while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
295                 if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
296                         netdev_warn(dev, "timeout waiting for Tx RDC.\n");
297                         ax_reset_8390(dev);
298                         ax_NS8390_init(dev, 1);
299                         break;
300                 }
301         }
302 
303         ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
304         ei_local->dmaing &= ~0x01;
305 }
306 
307 /* definitions for accessing MII/EEPROM interface */
308 
309 #define AX_MEMR                 EI_SHIFT(0x14)
310 #define AX_MEMR_MDC             BIT(0)
311 #define AX_MEMR_MDIR            BIT(1)
312 #define AX_MEMR_MDI             BIT(2)
313 #define AX_MEMR_MDO             BIT(3)
314 #define AX_MEMR_EECS            BIT(4)
315 #define AX_MEMR_EEI             BIT(5)
316 #define AX_MEMR_EEO             BIT(6)
317 #define AX_MEMR_EECLK           BIT(7)
318 
319 static void ax_handle_link_change(struct net_device *dev)
320 {
321         struct ax_device  *ax = to_ax_dev(dev);
322         struct phy_device *phy_dev = dev->phydev;
323         int status_change = 0;
324 
325         if (phy_dev->link && ((ax->speed != phy_dev->speed) ||
326                              (ax->duplex != phy_dev->duplex))) {
327 
328                 ax->speed = phy_dev->speed;
329                 ax->duplex = phy_dev->duplex;
330                 status_change = 1;
331         }
332 
333         if (phy_dev->link != ax->link) {
334                 if (!phy_dev->link) {
335                         ax->speed = 0;
336                         ax->duplex = -1;
337                 }
338                 ax->link = phy_dev->link;
339 
340                 status_change = 1;
341         }
342 
343         if (status_change)
344                 phy_print_status(phy_dev);
345 }
346 
347 static int ax_mii_probe(struct net_device *dev)
348 {
349         struct ax_device  *ax = to_ax_dev(dev);
350         struct phy_device *phy_dev = NULL;
351         int ret;
352 
353         /* find the first phy */
354         phy_dev = phy_find_first(ax->mii_bus);
355         if (!phy_dev) {
356                 netdev_err(dev, "no PHY found\n");
357                 return -ENODEV;
358         }
359 
360         ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change,
361                                  PHY_INTERFACE_MODE_MII);
362         if (ret) {
363                 netdev_err(dev, "Could not attach to PHY\n");
364                 return ret;
365         }
366 
367         /* mask with MAC supported features */
368         phy_dev->supported &= PHY_BASIC_FEATURES;
369         phy_dev->advertising = phy_dev->supported;
370 
371         netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
372                     phy_dev->drv->name, phydev_name(phy_dev), phy_dev->irq);
373 
374         return 0;
375 }
376 
377 static void ax_phy_switch(struct net_device *dev, int on)
378 {
379         struct ei_device *ei_local = netdev_priv(dev);
380         struct ax_device *ax = to_ax_dev(dev);
381 
382         u8 reg_gpoc =  ax->plat->gpoc_val;
383 
384         if (!!on)
385                 reg_gpoc &= ~AX_GPOC_PPDSET;
386         else
387                 reg_gpoc |= AX_GPOC_PPDSET;
388 
389         ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17));
390 }
391 
392 static int ax_open(struct net_device *dev)
393 {
394         struct ax_device *ax = to_ax_dev(dev);
395         int ret;
396 
397         netdev_dbg(dev, "open\n");
398 
399         ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
400                           dev->name, dev);
401         if (ret)
402                 goto failed_request_irq;
403 
404         /* turn the phy on (if turned off) */
405         ax_phy_switch(dev, 1);
406 
407         ret = ax_mii_probe(dev);
408         if (ret)
409                 goto failed_mii_probe;
410         phy_start(dev->phydev);
411 
412         ret = ax_ei_open(dev);
413         if (ret)
414                 goto failed_ax_ei_open;
415 
416         ax->running = 1;
417 
418         return 0;
419 
420  failed_ax_ei_open:
421         phy_disconnect(dev->phydev);
422  failed_mii_probe:
423         ax_phy_switch(dev, 0);
424         free_irq(dev->irq, dev);
425  failed_request_irq:
426         return ret;
427 }
428 
429 static int ax_close(struct net_device *dev)
430 {
431         struct ax_device *ax = to_ax_dev(dev);
432 
433         netdev_dbg(dev, "close\n");
434 
435         ax->running = 0;
436         wmb();
437 
438         ax_ei_close(dev);
439 
440         /* turn the phy off */
441         ax_phy_switch(dev, 0);
442         phy_disconnect(dev->phydev);
443 
444         free_irq(dev->irq, dev);
445         return 0;
446 }
447 
448 static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
449 {
450         struct phy_device *phy_dev = dev->phydev;
451 
452         if (!netif_running(dev))
453                 return -EINVAL;
454 
455         if (!phy_dev)
456                 return -ENODEV;
457 
458         return phy_mii_ioctl(phy_dev, req, cmd);
459 }
460 
461 /* ethtool ops */
462 
463 static void ax_get_drvinfo(struct net_device *dev,
464                            struct ethtool_drvinfo *info)
465 {
466         struct platform_device *pdev = to_platform_device(dev->dev.parent);
467 
468         strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
469         strlcpy(info->version, DRV_VERSION, sizeof(info->version));
470         strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
471 }
472 
473 static u32 ax_get_msglevel(struct net_device *dev)
474 {
475         struct ei_device *ei_local = netdev_priv(dev);
476 
477         return ei_local->msg_enable;
478 }
479 
480 static void ax_set_msglevel(struct net_device *dev, u32 v)
481 {
482         struct ei_device *ei_local = netdev_priv(dev);
483 
484         ei_local->msg_enable = v;
485 }
486 
487 static const struct ethtool_ops ax_ethtool_ops = {
488         .get_drvinfo            = ax_get_drvinfo,
489         .get_link               = ethtool_op_get_link,
490         .get_ts_info            = ethtool_op_get_ts_info,
491         .get_msglevel           = ax_get_msglevel,
492         .set_msglevel           = ax_set_msglevel,
493         .get_link_ksettings     = phy_ethtool_get_link_ksettings,
494         .set_link_ksettings     = phy_ethtool_set_link_ksettings,
495 };
496 
497 #ifdef CONFIG_AX88796_93CX6
498 static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
499 {
500         struct ei_device *ei_local = eeprom->data;
501         u8 reg = ei_inb(ei_local->mem + AX_MEMR);
502 
503         eeprom->reg_data_in = reg & AX_MEMR_EEI;
504         eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
505         eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
506         eeprom->reg_chip_select = reg & AX_MEMR_EECS;
507 }
508 
509 static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
510 {
511         struct ei_device *ei_local = eeprom->data;
512         u8 reg = ei_inb(ei_local->mem + AX_MEMR);
513 
514         reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
515 
516         if (eeprom->reg_data_in)
517                 reg |= AX_MEMR_EEI;
518         if (eeprom->reg_data_clock)
519                 reg |= AX_MEMR_EECLK;
520         if (eeprom->reg_chip_select)
521                 reg |= AX_MEMR_EECS;
522 
523         ei_outb(reg, ei_local->mem + AX_MEMR);
524         udelay(10);
525 }
526 #endif
527 
528 static const struct net_device_ops ax_netdev_ops = {
529         .ndo_open               = ax_open,
530         .ndo_stop               = ax_close,
531         .ndo_do_ioctl           = ax_ioctl,
532 
533         .ndo_start_xmit         = ax_ei_start_xmit,
534         .ndo_tx_timeout         = ax_ei_tx_timeout,
535         .ndo_get_stats          = ax_ei_get_stats,
536         .ndo_set_rx_mode        = ax_ei_set_multicast_list,
537         .ndo_validate_addr      = eth_validate_addr,
538         .ndo_set_mac_address    = eth_mac_addr,
539 #ifdef CONFIG_NET_POLL_CONTROLLER
540         .ndo_poll_controller    = ax_ei_poll,
541 #endif
542 };
543 
544 static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level)
545 {
546         struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
547 
548         if (level)
549                 ax->reg_memr |= AX_MEMR_MDC;
550         else
551                 ax->reg_memr &= ~AX_MEMR_MDC;
552 
553         ei_outb(ax->reg_memr, ax->addr_memr);
554 }
555 
556 static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output)
557 {
558         struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
559 
560         if (output)
561                 ax->reg_memr &= ~AX_MEMR_MDIR;
562         else
563                 ax->reg_memr |= AX_MEMR_MDIR;
564 
565         ei_outb(ax->reg_memr, ax->addr_memr);
566 }
567 
568 static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value)
569 {
570         struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
571 
572         if (value)
573                 ax->reg_memr |= AX_MEMR_MDO;
574         else
575                 ax->reg_memr &= ~AX_MEMR_MDO;
576 
577         ei_outb(ax->reg_memr, ax->addr_memr);
578 }
579 
580 static int ax_bb_get_data(struct mdiobb_ctrl *ctrl)
581 {
582         struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
583         int reg_memr = ei_inb(ax->addr_memr);
584 
585         return reg_memr & AX_MEMR_MDI ? 1 : 0;
586 }
587 
588 static struct mdiobb_ops bb_ops = {
589         .owner = THIS_MODULE,
590         .set_mdc = ax_bb_mdc,
591         .set_mdio_dir = ax_bb_dir,
592         .set_mdio_data = ax_bb_set_data,
593         .get_mdio_data = ax_bb_get_data,
594 };
595 
596 /* setup code */
597 
598 static int ax_mii_init(struct net_device *dev)
599 {
600         struct platform_device *pdev = to_platform_device(dev->dev.parent);
601         struct ei_device *ei_local = netdev_priv(dev);
602         struct ax_device *ax = to_ax_dev(dev);
603         int err;
604 
605         ax->bb_ctrl.ops = &bb_ops;
606         ax->addr_memr = ei_local->mem + AX_MEMR;
607         ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl);
608         if (!ax->mii_bus) {
609                 err = -ENOMEM;
610                 goto out;
611         }
612 
613         ax->mii_bus->name = "ax88796_mii_bus";
614         ax->mii_bus->parent = dev->dev.parent;
615         snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
616                 pdev->name, pdev->id);
617 
618         err = mdiobus_register(ax->mii_bus);
619         if (err)
620                 goto out_free_mdio_bitbang;
621 
622         return 0;
623 
624  out_free_mdio_bitbang:
625         free_mdio_bitbang(ax->mii_bus);
626  out:
627         return err;
628 }
629 
630 static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
631 {
632         void __iomem *ioaddr = ei_local->mem;
633         struct ax_device *ax = to_ax_dev(dev);
634 
635         /* Select page 0 */
636         ei_outb(E8390_NODMA + E8390_PAGE0 + E8390_STOP, ioaddr + E8390_CMD);
637 
638         /* set to byte access */
639         ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
640         ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
641 }
642 
643 /*
644  * ax_init_dev
645  *
646  * initialise the specified device, taking care to note the MAC
647  * address it may already have (if configured), ensure
648  * the device is ready to be used by lib8390.c and registerd with
649  * the network layer.
650  */
651 static int ax_init_dev(struct net_device *dev)
652 {
653         struct ei_device *ei_local = netdev_priv(dev);
654         struct ax_device *ax = to_ax_dev(dev);
655         void __iomem *ioaddr = ei_local->mem;
656         unsigned int start_page;
657         unsigned int stop_page;
658         int ret;
659         int i;
660 
661         ret = ax_initial_check(dev);
662         if (ret)
663                 goto err_out;
664 
665         /* setup goes here */
666 
667         ax_initial_setup(dev, ei_local);
668 
669         /* read the mac from the card prom if we need it */
670 
671         if (ax->plat->flags & AXFLG_HAS_EEPROM) {
672                 unsigned char SA_prom[32];
673 
674                 for (i = 0; i < sizeof(SA_prom); i += 2) {
675                         SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
676                         SA_prom[i + 1] = ei_inb(ioaddr + NE_DATAPORT);
677                 }
678 
679                 if (ax->plat->wordlength == 2)
680                         for (i = 0; i < 16; i++)
681                                 SA_prom[i] = SA_prom[i+i];
682 
683                 memcpy(dev->dev_addr, SA_prom, ETH_ALEN);
684         }
685 
686 #ifdef CONFIG_AX88796_93CX6
687         if (ax->plat->flags & AXFLG_HAS_93CX6) {
688                 unsigned char mac_addr[ETH_ALEN];
689                 struct eeprom_93cx6 eeprom;
690 
691                 eeprom.data = ei_local;
692                 eeprom.register_read = ax_eeprom_register_read;
693                 eeprom.register_write = ax_eeprom_register_write;
694                 eeprom.width = PCI_EEPROM_WIDTH_93C56;
695 
696                 eeprom_93cx6_multiread(&eeprom, 0,
697                                        (__le16 __force *)mac_addr,
698                                        sizeof(mac_addr) >> 1);
699 
700                 memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
701         }
702 #endif
703         if (ax->plat->wordlength == 2) {
704                 /* We must set the 8390 for word mode. */
705                 ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
706                 start_page = NESM_START_PG;
707                 stop_page = NESM_STOP_PG;
708         } else {
709                 start_page = NE1SM_START_PG;
710                 stop_page = NE1SM_STOP_PG;
711         }
712 
713         /* load the mac-address from the device */
714         if (ax->plat->flags & AXFLG_MAC_FROMDEV) {
715                 ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
716                         ei_local->mem + E8390_CMD); /* 0x61 */
717                 for (i = 0; i < ETH_ALEN; i++)
718                         dev->dev_addr[i] =
719                                 ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
720         }
721 
722         if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
723             ax->plat->mac_addr)
724                 memcpy(dev->dev_addr, ax->plat->mac_addr, ETH_ALEN);
725 
726         ax_reset_8390(dev);
727 
728         ei_local->name = "AX88796";
729         ei_local->tx_start_page = start_page;
730         ei_local->stop_page = stop_page;
731         ei_local->word16 = (ax->plat->wordlength == 2);
732         ei_local->rx_start_page = start_page + TX_PAGES;
733 
734 #ifdef PACKETBUF_MEMSIZE
735         /* Allow the packet buffer size to be overridden by know-it-alls. */
736         ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE;
737 #endif
738 
739         ei_local->reset_8390 = &ax_reset_8390;
740         ei_local->block_input = &ax_block_input;
741         ei_local->block_output = &ax_block_output;
742         ei_local->get_8390_hdr = &ax_get_8390_hdr;
743         ei_local->priv = 0;
744         ei_local->msg_enable = ax_msg_enable;
745 
746         dev->netdev_ops = &ax_netdev_ops;
747         dev->ethtool_ops = &ax_ethtool_ops;
748 
749         ret = ax_mii_init(dev);
750         if (ret)
751                 goto out_irq;
752 
753         ax_NS8390_init(dev, 0);
754 
755         ret = register_netdev(dev);
756         if (ret)
757                 goto out_irq;
758 
759         netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n",
760                     ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr,
761                     dev->dev_addr);
762 
763         return 0;
764 
765  out_irq:
766         /* cleanup irq */
767         free_irq(dev->irq, dev);
768  err_out:
769         return ret;
770 }
771 
772 static 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  */
804 static 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
930 static 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 
943 static 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 
963 static 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 
973 module_platform_driver(axdrv);
974 
975 MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
976 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
977 MODULE_LICENSE("GPL v2");
978 MODULE_ALIAS("platform:ax88796");
979 

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