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

  1 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
  2 /*
  3     Written 1992-94 by Donald Becker.
  4 
  5     Copyright 1993 United States Government as represented by the
  6     Director, National Security Agency.
  7 
  8     This software may be used and distributed according to the terms
  9     of the GNU General Public License, incorporated herein by reference.
 10 
 11     The author may be reached as becker@scyld.com, or C/O
 12     Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
 13 
 14     This driver should work with many programmed-I/O 8390-based ethernet
 15     boards.  Currently it supports the NE1000, NE2000, many clones,
 16     and some Cabletron products.
 17 
 18     Changelog:
 19 
 20     Paul Gortmaker      : use ENISR_RDC to monitor Tx PIO uploads, made
 21                           sanity checks and bad clone support optional.
 22     Paul Gortmaker      : new reset code, reset card after probe at boot.
 23     Paul Gortmaker      : multiple card support for module users.
 24     Paul Gortmaker      : Support for PCI ne2k clones, similar to lance.c
 25     Paul Gortmaker      : Allow users with bad cards to avoid full probe.
 26     Paul Gortmaker      : PCI probe changes, more PCI cards supported.
 27     rjohnson@analogic.com : Changed init order so an interrupt will only
 28     occur after memory is allocated for dev->priv. Deallocated memory
 29     last in cleanup_modue()
 30     Richard Guenther    : Added support for ISAPnP cards
 31     Paul Gortmaker      : Discontinued PCI support - use ne2k-pci.c instead.
 32     Hayato Fujiwara     : Add m32r support.
 33 
 34 */
 35 
 36 /* Routines for the NatSemi-based designs (NE[12]000). */
 37 
 38 static const char version1[] =
 39 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
 40 static const char version2[] =
 41 "Last modified Nov 1, 2000 by Paul Gortmaker\n";
 42 
 43 
 44 #include <linux/module.h>
 45 #include <linux/kernel.h>
 46 #include <linux/errno.h>
 47 #include <linux/isapnp.h>
 48 #include <linux/init.h>
 49 #include <linux/interrupt.h>
 50 #include <linux/delay.h>
 51 #include <linux/netdevice.h>
 52 #include <linux/etherdevice.h>
 53 #include <linux/jiffies.h>
 54 #include <linux/platform_device.h>
 55 
 56 #include <asm/io.h>
 57 
 58 #include "8390.h"
 59 
 60 #define DRV_NAME "ne"
 61 
 62 /* Some defines that people can play with if so inclined. */
 63 
 64 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
 65 #define SUPPORT_NE_BAD_CLONES
 66 /* 0xbad = bad sig or no reset ack */
 67 #define BAD 0xbad
 68 
 69 #define MAX_NE_CARDS    4       /* Max number of NE cards per module */
 70 static struct platform_device *pdev_ne[MAX_NE_CARDS];
 71 static int io[MAX_NE_CARDS];
 72 static int irq[MAX_NE_CARDS];
 73 static int bad[MAX_NE_CARDS];
 74 static u32 ne_msg_enable;
 75 
 76 #ifdef MODULE
 77 module_param_array(io, int, NULL, 0);
 78 module_param_array(irq, int, NULL, 0);
 79 module_param_array(bad, int, NULL, 0);
 80 module_param_named(msg_enable, ne_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
 81 MODULE_PARM_DESC(io, "I/O base address(es),required");
 82 MODULE_PARM_DESC(irq, "IRQ number(s)");
 83 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
 84 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
 85 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
 86 MODULE_LICENSE("GPL");
 87 #endif /* MODULE */
 88 
 89 /* Do we perform extra sanity checks on stuff ? */
 90 /* #define NE_SANITY_CHECK */
 91 
 92 /* Do we implement the read before write bugfix ? */
 93 /* #define NE_RW_BUGFIX */
 94 
 95 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
 96 /* #define PACKETBUF_MEMSIZE    0x40 */
 97 
 98 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
 99 that the ne2k probe is the last 8390 based probe to take place (as it
100 is at boot) and so the probe will get confused by any other 8390 cards.
101 ISA device autoprobes on a running machine are not recommended anyway. */
102 #if !defined(MODULE) && (defined(CONFIG_ISA) || defined(CONFIG_M32R))
103 /* Do we need a portlist for the ISA auto-probe ? */
104 #define NEEDS_PORTLIST
105 #endif
106 
107 /* A zero-terminated list of I/O addresses to be probed at boot. */
108 #ifdef NEEDS_PORTLIST
109 static unsigned int netcard_portlist[] __initdata = {
110         0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
111 };
112 #endif
113 
114 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
115         {       ISAPNP_CARD_ID('A','X','E',0x2011),
116                 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
117                 (long) "NetGear EA201" },
118         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
119                 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
120                 (long) "NN NE2000" },
121         {       ISAPNP_ANY_ID, ISAPNP_ANY_ID,
122                 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
123                 (long) "Generic PNP" },
124         { }     /* terminate list */
125 };
126 
127 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
128 
129 #ifdef SUPPORT_NE_BAD_CLONES
130 /* A list of bad clones that we none-the-less recognize. */
131 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
132 bad_clone_list[] __initdata = {
133     {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
134     {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
135     {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
136     {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
137     {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
138     {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
139     {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
140     {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
141     {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
142     {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
143     {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
144     {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
145     {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
146 #ifdef CONFIG_MACH_TX49XX
147     {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}},  /* Toshiba built-in */
148 #endif
149     {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
150     {NULL,}
151 };
152 #endif
153 
154 /* ---- No user-serviceable parts below ---- */
155 
156 #define NE_BASE  (dev->base_addr)
157 #define NE_CMD          0x00
158 #define NE_DATAPORT     0x10    /* NatSemi-defined port window offset. */
159 #define NE_RESET        0x1f    /* Issue a read to reset, a write to clear. */
160 #define NE_IO_EXTENT    0x20
161 
162 #define NE1SM_START_PG  0x20    /* First page of TX buffer */
163 #define NE1SM_STOP_PG   0x40    /* Last page +1 of RX ring */
164 #define NESM_START_PG   0x40    /* First page of TX buffer */
165 #define NESM_STOP_PG    0x80    /* Last page +1 of RX ring */
166 
167 #if defined(CONFIG_PLAT_MAPPI)
168 #  define DCR_VAL 0x4b
169 #elif defined(CONFIG_PLAT_OAKS32R)  || \
170    defined(CONFIG_MACH_TX49XX)
171 #  define DCR_VAL 0x48          /* 8-bit mode */
172 #elif defined(CONFIG_ATARI)     /* 8-bit mode on Atari, normal on Q40 */
173 #  define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
174 #else
175 #  define DCR_VAL 0x49
176 #endif
177 
178 static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
179 static int ne_probe_isapnp(struct net_device *dev);
180 
181 static void ne_reset_8390(struct net_device *dev);
182 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
183                           int ring_page);
184 static void ne_block_input(struct net_device *dev, int count,
185                           struct sk_buff *skb, int ring_offset);
186 static void ne_block_output(struct net_device *dev, const int count,
187                 const unsigned char *buf, const int start_page);
188 
189 
190 /*  Probe for various non-shared-memory ethercards.
191 
192    NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
193    buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
194    the SAPROM, while other supposed NE2000 clones must be detected by their
195    SA prefix.
196 
197    Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
198    mode results in doubled values, which can be detected and compensated for.
199 
200    The probe is also responsible for initializing the card and filling
201    in the 'dev' and 'ei_status' structures.
202 
203    We use the minimum memory size for some ethercard product lines, iff we can't
204    distinguish models.  You can increase the packet buffer size by setting
205    PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
206         E1010   starts at 0x100 and ends at 0x2000.
207         E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
208         E2010    starts at 0x100 and ends at 0x4000.
209         E2010-x starts at 0x100 and ends at 0xffff.  */
210 
211 static int __init do_ne_probe(struct net_device *dev)
212 {
213         unsigned long base_addr = dev->base_addr;
214 #ifdef NEEDS_PORTLIST
215         int orig_irq = dev->irq;
216 #endif
217 
218         /* First check any supplied i/o locations. User knows best. <cough> */
219         if (base_addr > 0x1ff) {        /* Check a single specified location. */
220                 int ret = ne_probe1(dev, base_addr);
221                 if (ret)
222                         netdev_warn(dev, "ne.c: No NE*000 card found at "
223                                     "i/o = %#lx\n", base_addr);
224                 return ret;
225         }
226         else if (base_addr != 0)        /* Don't probe at all. */
227                 return -ENXIO;
228 
229         /* Then look for any installed ISAPnP clones */
230         if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
231                 return 0;
232 
233 #ifdef NEEDS_PORTLIST
234         /* Last resort. The semi-risky ISA auto-probe. */
235         for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
236                 int ioaddr = netcard_portlist[base_addr];
237                 dev->irq = orig_irq;
238                 if (ne_probe1(dev, ioaddr) == 0)
239                         return 0;
240         }
241 #endif
242 
243         return -ENODEV;
244 }
245 
246 static int __init ne_probe_isapnp(struct net_device *dev)
247 {
248         int i;
249 
250         for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
251                 struct pnp_dev *idev = NULL;
252 
253                 while ((idev = pnp_find_dev(NULL,
254                                             isapnp_clone_list[i].vendor,
255                                             isapnp_clone_list[i].function,
256                                             idev))) {
257                         /* Avoid already found cards from previous calls */
258                         if (pnp_device_attach(idev) < 0)
259                                 continue;
260                         if (pnp_activate_dev(idev) < 0) {
261                                 pnp_device_detach(idev);
262                                 continue;
263                         }
264                         /* if no io and irq, search for next */
265                         if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
266                                 pnp_device_detach(idev);
267                                 continue;
268                         }
269                         /* found it */
270                         dev->base_addr = pnp_port_start(idev, 0);
271                         dev->irq = pnp_irq(idev, 0);
272                         netdev_info(dev,
273                                     "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
274                                     (char *) isapnp_clone_list[i].driver_data,
275                                     dev->base_addr, dev->irq);
276                         if (ne_probe1(dev, dev->base_addr) != 0) {      /* Shouldn't happen. */
277                                 netdev_err(dev,
278                                            "ne.c: Probe of ISAPnP card at %#lx failed.\n",
279                                            dev->base_addr);
280                                 pnp_device_detach(idev);
281                                 return -ENXIO;
282                         }
283                         ei_status.priv = (unsigned long)idev;
284                         break;
285                 }
286                 if (!idev)
287                         continue;
288                 return 0;
289         }
290 
291         return -ENODEV;
292 }
293 
294 static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
295 {
296         int i;
297         unsigned char SA_prom[32];
298         int wordlength = 2;
299         const char *name = NULL;
300         int start_page, stop_page;
301         int neX000, ctron, copam, bad_card;
302         int reg0, ret;
303         static unsigned version_printed;
304         struct ei_device *ei_local = netdev_priv(dev);
305 
306         if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
307                 return -EBUSY;
308 
309         reg0 = inb_p(ioaddr);
310         if (reg0 == 0xFF) {
311                 ret = -ENODEV;
312                 goto err_out;
313         }
314 
315         /* Do a preliminary verification that we have a 8390. */
316         {
317                 int regd;
318                 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
319                 regd = inb_p(ioaddr + 0x0d);
320                 outb_p(0xff, ioaddr + 0x0d);
321                 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
322                 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
323                 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
324                         outb_p(reg0, ioaddr);
325                         outb_p(regd, ioaddr + 0x0d);    /* Restore the old values. */
326                         ret = -ENODEV;
327                         goto err_out;
328                 }
329         }
330 
331         if ((ne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
332                 netdev_info(dev, "%s%s", version1, version2);
333 
334         netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
335 
336         /* A user with a poor card that fails to ack the reset, or that
337            does not have a valid 0x57,0x57 signature can still use this
338            without having to recompile. Specifying an i/o address along
339            with an otherwise unused dev->mem_end value of "0xBAD" will
340            cause the driver to skip these parts of the probe. */
341 
342         bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
343 
344         /* Reset card. Who knows what dain-bramaged state it was left in. */
345 
346         {
347                 unsigned long reset_start_time = jiffies;
348 
349                 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
350                 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
351 
352                 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
353                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
354                         if (bad_card) {
355                                 pr_cont(" (warning: no reset ack)");
356                                 break;
357                         } else {
358                                 pr_cont(" not found (no reset ack).\n");
359                                 ret = -ENODEV;
360                                 goto err_out;
361                         }
362                 }
363 
364                 outb_p(0xff, ioaddr + EN0_ISR);         /* Ack all intr. */
365         }
366 
367         /* Read the 16 bytes of station address PROM.
368            We must first initialize registers, similar to NS8390p_init(eifdev, 0).
369            We can't reliably read the SAPROM address without this.
370            (I learned the hard way!). */
371         {
372                 struct {unsigned char value, offset; } program_seq[] =
373                 {
374                         {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
375                         {0x48,  EN0_DCFG},      /* Set byte-wide (0x48) access. */
376                         {0x00,  EN0_RCNTLO},    /* Clear the count regs. */
377                         {0x00,  EN0_RCNTHI},
378                         {0x00,  EN0_IMR},       /* Mask completion irq. */
379                         {0xFF,  EN0_ISR},
380                         {E8390_RXOFF, EN0_RXCR},        /* 0x20  Set to monitor */
381                         {E8390_TXOFF, EN0_TXCR},        /* 0x02  and loopback mode. */
382                         {32,    EN0_RCNTLO},
383                         {0x00,  EN0_RCNTHI},
384                         {0x00,  EN0_RSARLO},    /* DMA starting at 0x0000. */
385                         {0x00,  EN0_RSARHI},
386                         {E8390_RREAD+E8390_START, E8390_CMD},
387                 };
388 
389                 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
390                         outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
391 
392         }
393         for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
394                 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
395                 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
396                 if (SA_prom[i] != SA_prom[i+1])
397                         wordlength = 1;
398         }
399 
400         if (wordlength == 2)
401         {
402                 for (i = 0; i < 16; i++)
403                         SA_prom[i] = SA_prom[i+i];
404                 /* We must set the 8390 for word mode. */
405                 outb_p(DCR_VAL, ioaddr + EN0_DCFG);
406                 start_page = NESM_START_PG;
407 
408                 /*
409                  * Realtek RTL8019AS datasheet says that the PSTOP register
410                  * shouldn't exceed 0x60 in 8-bit mode.
411                  * This chip can be identified by reading the signature from
412                  * the  remote byte count registers (otherwise write-only)...
413                  */
414                 if ((DCR_VAL & 0x01) == 0 &&            /* 8-bit mode */
415                     inb(ioaddr + EN0_RCNTLO) == 0x50 &&
416                     inb(ioaddr + EN0_RCNTHI) == 0x70)
417                         stop_page = 0x60;
418                 else
419                         stop_page = NESM_STOP_PG;
420         } else {
421                 start_page = NE1SM_START_PG;
422                 stop_page  = NE1SM_STOP_PG;
423         }
424 
425 #if  defined(CONFIG_PLAT_MAPPI) || defined(CONFIG_PLAT_OAKS32R)
426         neX000 = ((SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57)
427                 || (SA_prom[14] == 0x42 && SA_prom[15] == 0x42));
428 #else
429         neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
430 #endif
431         ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
432         copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
433 
434         /* Set up the rest of the parameters. */
435         if (neX000 || bad_card || copam) {
436                 name = (wordlength == 2) ? "NE2000" : "NE1000";
437         }
438         else if (ctron)
439         {
440                 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
441                 start_page = 0x01;
442                 stop_page = (wordlength == 2) ? 0x40 : 0x20;
443         }
444         else
445         {
446 #ifdef SUPPORT_NE_BAD_CLONES
447                 /* Ack!  Well, there might be a *bad* NE*000 clone there.
448                    Check for total bogus addresses. */
449                 for (i = 0; bad_clone_list[i].name8; i++)
450                 {
451                         if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
452                                 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
453                                 SA_prom[2] == bad_clone_list[i].SAprefix[2])
454                         {
455                                 if (wordlength == 2)
456                                 {
457                                         name = bad_clone_list[i].name16;
458                                 } else {
459                                         name = bad_clone_list[i].name8;
460                                 }
461                                 break;
462                         }
463                 }
464                 if (bad_clone_list[i].name8 == NULL)
465                 {
466                         pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
467                                 SA_prom[14], SA_prom[15]);
468                         ret = -ENXIO;
469                         goto err_out;
470                 }
471 #else
472                 pr_cont(" not found.\n");
473                 ret = -ENXIO;
474                 goto err_out;
475 #endif
476         }
477 
478         if (dev->irq < 2)
479         {
480                 unsigned long cookie = probe_irq_on();
481                 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
482                 outb_p(0x00, ioaddr + EN0_RCNTLO);
483                 outb_p(0x00, ioaddr + EN0_RCNTHI);
484                 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
485                 mdelay(10);             /* wait 10ms for interrupt to propagate */
486                 outb_p(0x00, ioaddr + EN0_IMR);                 /* Mask it again. */
487                 dev->irq = probe_irq_off(cookie);
488                 if (netif_msg_probe(ei_local))
489                         pr_cont(" autoirq is %d", dev->irq);
490         } else if (dev->irq == 2)
491                 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
492                    or don't know which one to set. */
493                 dev->irq = 9;
494 
495         if (! dev->irq) {
496                 pr_cont(" failed to detect IRQ line.\n");
497                 ret = -EAGAIN;
498                 goto err_out;
499         }
500 
501         /* Snarf the interrupt now.  There's no point in waiting since we cannot
502            share and the board will usually be enabled. */
503         ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
504         if (ret) {
505                 pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
506                 goto err_out;
507         }
508 
509         dev->base_addr = ioaddr;
510 
511 #ifdef CONFIG_PLAT_MAPPI
512         outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
513                 ioaddr + E8390_CMD); /* 0x61 */
514         for (i = 0; i < ETH_ALEN; i++) {
515                 dev->dev_addr[i] = SA_prom[i]
516                         = inb_p(ioaddr + EN1_PHYS_SHIFT(i));
517         }
518 #else
519         for (i = 0; i < ETH_ALEN; i++) {
520                 dev->dev_addr[i] = SA_prom[i];
521         }
522 #endif
523 
524         pr_cont("%pM\n", dev->dev_addr);
525 
526         ei_status.name = name;
527         ei_status.tx_start_page = start_page;
528         ei_status.stop_page = stop_page;
529 
530         /* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
531         ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
532 
533         ei_status.rx_start_page = start_page + TX_PAGES;
534 #ifdef PACKETBUF_MEMSIZE
535          /* Allow the packet buffer size to be overridden by know-it-alls. */
536         ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
537 #endif
538 
539         ei_status.reset_8390 = &ne_reset_8390;
540         ei_status.block_input = &ne_block_input;
541         ei_status.block_output = &ne_block_output;
542         ei_status.get_8390_hdr = &ne_get_8390_hdr;
543         ei_status.priv = 0;
544 
545         dev->netdev_ops = &eip_netdev_ops;
546         NS8390p_init(dev, 0);
547 
548         ei_local->msg_enable = ne_msg_enable;
549         ret = register_netdev(dev);
550         if (ret)
551                 goto out_irq;
552         netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
553                     name, ioaddr, dev->irq);
554         return 0;
555 
556 out_irq:
557         free_irq(dev->irq, dev);
558 err_out:
559         release_region(ioaddr, NE_IO_EXTENT);
560         return ret;
561 }
562 
563 /* Hard reset the card.  This used to pause for the same period that a
564    8390 reset command required, but that shouldn't be necessary. */
565 
566 static void ne_reset_8390(struct net_device *dev)
567 {
568         unsigned long reset_start_time = jiffies;
569         struct ei_device *ei_local = netdev_priv(dev);
570 
571         netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
572 
573         /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
574         outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
575 
576         ei_status.txing = 0;
577         ei_status.dmaing = 0;
578 
579         /* This check _should_not_ be necessary, omit eventually. */
580         while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
581                 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
582                         netdev_err(dev, "ne_reset_8390() did not complete.\n");
583                         break;
584                 }
585         outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
586 }
587 
588 /* Grab the 8390 specific header. Similar to the block_input routine, but
589    we don't need to be concerned with ring wrap as the header will be at
590    the start of a page, so we optimize accordingly. */
591 
592 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
593 {
594         int nic_base = dev->base_addr;
595 
596         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
597 
598         if (ei_status.dmaing)
599         {
600                 netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
601                            "[DMAstat:%d][irqlock:%d].\n",
602                            ei_status.dmaing, ei_status.irqlock);
603                 return;
604         }
605 
606         ei_status.dmaing |= 0x01;
607         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
608         outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
609         outb_p(0, nic_base + EN0_RCNTHI);
610         outb_p(0, nic_base + EN0_RSARLO);               /* On page boundary */
611         outb_p(ring_page, nic_base + EN0_RSARHI);
612         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
613 
614         if (ei_status.word16)
615                 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
616         else
617                 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
618 
619         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
620         ei_status.dmaing &= ~0x01;
621 
622         le16_to_cpus(&hdr->count);
623 }
624 
625 /* Block input and output, similar to the Crynwr packet driver.  If you
626    are porting to a new ethercard, look at the packet driver source for hints.
627    The NEx000 doesn't share the on-board packet memory -- you have to put
628    the packet out through the "remote DMA" dataport using outb. */
629 
630 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
631 {
632 #ifdef NE_SANITY_CHECK
633         int xfer_count = count;
634         struct ei_device *ei_local = netdev_priv(dev);
635 #endif
636         int nic_base = dev->base_addr;
637         char *buf = skb->data;
638 
639         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
640         if (ei_status.dmaing)
641         {
642                 netdev_err(dev, "DMAing conflict in ne_block_input "
643                            "[DMAstat:%d][irqlock:%d].\n",
644                            ei_status.dmaing, ei_status.irqlock);
645                 return;
646         }
647         ei_status.dmaing |= 0x01;
648         outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
649         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
650         outb_p(count >> 8, nic_base + EN0_RCNTHI);
651         outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
652         outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
653         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
654         if (ei_status.word16)
655         {
656                 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
657                 if (count & 0x01)
658                 {
659                         buf[count-1] = inb(NE_BASE + NE_DATAPORT);
660 #ifdef NE_SANITY_CHECK
661                         xfer_count++;
662 #endif
663                 }
664         } else {
665                 insb(NE_BASE + NE_DATAPORT, buf, count);
666         }
667 
668 #ifdef NE_SANITY_CHECK
669         /* This was for the ALPHA version only, but enough people have
670            been encountering problems so it is still here.  If you see
671            this message you either 1) have a slightly incompatible clone
672            or 2) have noise/speed problems with your bus. */
673 
674         if (netif_msg_rx_status(ei_local))
675         {
676                 /* DMA termination address check... */
677                 int addr, tries = 20;
678                 do {
679                         /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
680                            -- it's broken for Rx on some cards! */
681                         int high = inb_p(nic_base + EN0_RSARHI);
682                         int low = inb_p(nic_base + EN0_RSARLO);
683                         addr = (high << 8) + low;
684                         if (((ring_offset + xfer_count) & 0xff) == low)
685                                 break;
686                 } while (--tries > 0);
687                 if (tries <= 0)
688                         netdev_warn(dev, "RX transfer address mismatch,"
689                                     "%#4.4x (expected) vs. %#4.4x (actual).\n",
690                                     ring_offset + xfer_count, addr);
691         }
692 #endif
693         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
694         ei_status.dmaing &= ~0x01;
695 }
696 
697 static void ne_block_output(struct net_device *dev, int count,
698                 const unsigned char *buf, const int start_page)
699 {
700         int nic_base = NE_BASE;
701         unsigned long dma_start;
702 #ifdef NE_SANITY_CHECK
703         int retries = 0;
704         struct ei_device *ei_local = netdev_priv(dev);
705 #endif
706 
707         /* Round the count up for word writes.  Do we need to do this?
708            What effect will an odd byte count have on the 8390?
709            I should check someday. */
710 
711         if (ei_status.word16 && (count & 0x01))
712                 count++;
713 
714         /* This *shouldn't* happen. If it does, it's the last thing you'll see */
715         if (ei_status.dmaing)
716         {
717                 netdev_err(dev, "DMAing conflict in ne_block_output."
718                            "[DMAstat:%d][irqlock:%d]\n",
719                            ei_status.dmaing, ei_status.irqlock);
720                 return;
721         }
722         ei_status.dmaing |= 0x01;
723         /* We should already be in page 0, but to be safe... */
724         outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
725 
726 #ifdef NE_SANITY_CHECK
727 retry:
728 #endif
729 
730 #ifdef NE8390_RW_BUGFIX
731         /* Handle the read-before-write bug the same way as the
732            Crynwr packet driver -- the NatSemi method doesn't work.
733            Actually this doesn't always work either, but if you have
734            problems with your NEx000 this is better than nothing! */
735 
736         outb_p(0x42, nic_base + EN0_RCNTLO);
737         outb_p(0x00,   nic_base + EN0_RCNTHI);
738         outb_p(0x42, nic_base + EN0_RSARLO);
739         outb_p(0x00, nic_base + EN0_RSARHI);
740         outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
741         /* Make certain that the dummy read has occurred. */
742         udelay(6);
743 #endif
744 
745         outb_p(ENISR_RDC, nic_base + EN0_ISR);
746 
747         /* Now the normal output. */
748         outb_p(count & 0xff, nic_base + EN0_RCNTLO);
749         outb_p(count >> 8,   nic_base + EN0_RCNTHI);
750         outb_p(0x00, nic_base + EN0_RSARLO);
751         outb_p(start_page, nic_base + EN0_RSARHI);
752 
753         outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
754         if (ei_status.word16) {
755                 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
756         } else {
757                 outsb(NE_BASE + NE_DATAPORT, buf, count);
758         }
759 
760         dma_start = jiffies;
761 
762 #ifdef NE_SANITY_CHECK
763         /* This was for the ALPHA version only, but enough people have
764            been encountering problems so it is still here. */
765 
766         if (netif_msg_tx_queued(ei_local))
767         {
768                 /* DMA termination address check... */
769                 int addr, tries = 20;
770                 do {
771                         int high = inb_p(nic_base + EN0_RSARHI);
772                         int low = inb_p(nic_base + EN0_RSARLO);
773                         addr = (high << 8) + low;
774                         if ((start_page << 8) + count == addr)
775                                 break;
776                 } while (--tries > 0);
777 
778                 if (tries <= 0)
779                 {
780                         netdev_warn(dev, "Tx packet transfer address mismatch,"
781                                     "%#4.4x (expected) vs. %#4.4x (actual).\n",
782                                     (start_page << 8) + count, addr);
783                         if (retries++ == 0)
784                                 goto retry;
785                 }
786         }
787 #endif
788 
789         while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
790                 if (time_after(jiffies, dma_start + 2*HZ/100)) {                /* 20ms */
791                         netdev_warn(dev, "timeout waiting for Tx RDC.\n");
792                         ne_reset_8390(dev);
793                         NS8390p_init(dev, 1);
794                         break;
795                 }
796 
797         outb_p(ENISR_RDC, nic_base + EN0_ISR);  /* Ack intr. */
798         ei_status.dmaing &= ~0x01;
799 }
800 
801 static int __init ne_drv_probe(struct platform_device *pdev)
802 {
803         struct net_device *dev;
804         int err, this_dev = pdev->id;
805         struct resource *res;
806 
807         dev = alloc_eip_netdev();
808         if (!dev)
809                 return -ENOMEM;
810 
811         /* ne.c doesn't populate resources in platform_device, but
812          * rbtx4927_ne_init and rbtx4938_ne_init do register devices
813          * with resources.
814          */
815         res = platform_get_resource(pdev, IORESOURCE_IO, 0);
816         if (res) {
817                 dev->base_addr = res->start;
818                 dev->irq = platform_get_irq(pdev, 0);
819         } else {
820                 if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
821                         free_netdev(dev);
822                         return -EINVAL;
823                 }
824                 dev->base_addr = io[this_dev];
825                 dev->irq = irq[this_dev];
826                 dev->mem_end = bad[this_dev];
827         }
828         SET_NETDEV_DEV(dev, &pdev->dev);
829         err = do_ne_probe(dev);
830         if (err) {
831                 free_netdev(dev);
832                 return err;
833         }
834         platform_set_drvdata(pdev, dev);
835 
836         /* Update with any values found by probing, don't update if
837          * resources were specified.
838          */
839         if (!res) {
840                 io[this_dev] = dev->base_addr;
841                 irq[this_dev] = dev->irq;
842         }
843         return 0;
844 }
845 
846 static int ne_drv_remove(struct platform_device *pdev)
847 {
848         struct net_device *dev = platform_get_drvdata(pdev);
849 
850         if (dev) {
851                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
852                 netif_device_detach(dev);
853                 unregister_netdev(dev);
854                 if (idev)
855                         pnp_device_detach(idev);
856                 /* Careful ne_drv_remove can be called twice, once from
857                  * the platform_driver.remove and again when the
858                  * platform_device is being removed.
859                  */
860                 ei_status.priv = 0;
861                 free_irq(dev->irq, dev);
862                 release_region(dev->base_addr, NE_IO_EXTENT);
863                 free_netdev(dev);
864         }
865         return 0;
866 }
867 
868 /* Remove unused devices or all if true. */
869 static void ne_loop_rm_unreg(int all)
870 {
871         int this_dev;
872         struct platform_device *pdev;
873         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
874                 pdev = pdev_ne[this_dev];
875                 /* No network device == unused */
876                 if (pdev && (!platform_get_drvdata(pdev) || all)) {
877                         ne_drv_remove(pdev);
878                         platform_device_unregister(pdev);
879                         pdev_ne[this_dev] = NULL;
880                 }
881         }
882 }
883 
884 #ifdef CONFIG_PM
885 static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
886 {
887         struct net_device *dev = platform_get_drvdata(pdev);
888 
889         if (netif_running(dev)) {
890                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
891                 netif_device_detach(dev);
892                 if (idev)
893                         pnp_stop_dev(idev);
894         }
895         return 0;
896 }
897 
898 static int ne_drv_resume(struct platform_device *pdev)
899 {
900         struct net_device *dev = platform_get_drvdata(pdev);
901 
902         if (netif_running(dev)) {
903                 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
904                 if (idev)
905                         pnp_start_dev(idev);
906                 ne_reset_8390(dev);
907                 NS8390p_init(dev, 1);
908                 netif_device_attach(dev);
909         }
910         return 0;
911 }
912 #else
913 #define ne_drv_suspend NULL
914 #define ne_drv_resume NULL
915 #endif
916 
917 static struct platform_driver ne_driver = {
918         .remove         = ne_drv_remove,
919         .suspend        = ne_drv_suspend,
920         .resume         = ne_drv_resume,
921         .driver         = {
922                 .name   = DRV_NAME,
923                 .owner  = THIS_MODULE,
924         },
925 };
926 
927 static void __init ne_add_devices(void)
928 {
929         int this_dev;
930         struct platform_device *pdev;
931 
932         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
933                 if (pdev_ne[this_dev])
934                         continue;
935                 pdev = platform_device_register_simple(
936                         DRV_NAME, this_dev, NULL, 0);
937                 if (IS_ERR(pdev))
938                         continue;
939                 pdev_ne[this_dev] = pdev;
940         }
941 }
942 
943 #ifdef MODULE
944 int __init init_module(void)
945 {
946         int retval;
947         ne_add_devices();
948         retval = platform_driver_probe(&ne_driver, ne_drv_probe);
949         if (retval) {
950                 if (io[0] == 0)
951                         pr_notice("ne.c: You must supply \"io=0xNNN\""
952                                " value(s) for ISA cards.\n");
953                 ne_loop_rm_unreg(1);
954                 return retval;
955         }
956 
957         /* Unregister unused platform_devices. */
958         ne_loop_rm_unreg(0);
959         return retval;
960 }
961 #else /* MODULE */
962 static int __init ne_init(void)
963 {
964         int retval = platform_driver_probe(&ne_driver, ne_drv_probe);
965 
966         /* Unregister unused platform_devices. */
967         ne_loop_rm_unreg(0);
968         return retval;
969 }
970 module_init(ne_init);
971 
972 struct net_device * __init ne_probe(int unit)
973 {
974         int this_dev;
975         struct net_device *dev;
976 
977         /* Find an empty slot, that is no net_device and zero io port. */
978         this_dev = 0;
979         while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
980                 io[this_dev]) {
981                 if (++this_dev == MAX_NE_CARDS)
982                         return ERR_PTR(-ENOMEM);
983         }
984 
985         /* Get irq, io from kernel command line */
986         dev = alloc_eip_netdev();
987         if (!dev)
988                 return ERR_PTR(-ENOMEM);
989 
990         sprintf(dev->name, "eth%d", unit);
991         netdev_boot_setup_check(dev);
992 
993         io[this_dev] = dev->base_addr;
994         irq[this_dev] = dev->irq;
995         bad[this_dev] = dev->mem_end;
996 
997         free_netdev(dev);
998 
999         ne_add_devices();
1000 
1001         /* return the first device found */
1002         for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
1003                 if (pdev_ne[this_dev]) {
1004                         dev = platform_get_drvdata(pdev_ne[this_dev]);
1005                         if (dev)
1006                                 return dev;
1007                 }
1008         }
1009 
1010         return ERR_PTR(-ENODEV);
1011 }
1012 #endif /* MODULE */
1013 
1014 static void __exit ne_exit(void)
1015 {
1016         platform_driver_unregister(&ne_driver);
1017         ne_loop_rm_unreg(1);
1018 }
1019 module_exit(ne_exit);
1020 

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