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1.1 root 1: /* eepro.c: Intel EtherExpress Pro/10 device driver for Linux. */
2: /*
3: Written 1994-1998 by Bao C. Ha.
4:
5: Copyright (C) 1994-1998 by Bao C. Ha.
6:
7: This software may be used and distributed
8: according to the terms of the GNU Public License,
9: incorporated herein by reference.
10:
11: The author may be reached at [email protected]
12: or Hacom, 2477 Wrightsboro Rd., Augusta, GA 30904.
13:
14: Things remaining to do:
15: Better record keeping of errors.
16: Eliminate transmit interrupt to reduce overhead.
17: Implement "concurrent processing". I won't be doing it!
18:
19: Bugs:
20:
21: If you have a problem of not detecting the 82595 during a
22: reboot (warm reset), disable the FLASH memory should fix it.
23: This is a compatibility hardware problem.
24:
25: Versions:
26:
27: 0.10c Some cosmetic changes. (9/28/98, BCH)
28:
29: 0.10b Should work now with (some) Pro/10+. At least for
30: me (and my two cards) it does. _No_ guarantee for
31: function with non-Pro/10+ cards! (don't have any)
32: (RMC, 9/11/96)
33:
34: 0.10 Added support for the Etherexpress Pro/10+. The
35: IRQ map was changed significantly from the old
36: pro/10. The new interrupt map was provided by
37: Rainer M. Canavan ([email protected]).
38: (BCH, 9/3/96)
39:
40: 0.09 Fixed a race condition in the transmit algorithm,
41: which causes crashes under heavy load with fast
42: pentium computers. The performance should also
43: improve a bit. The size of RX buffer, and hence
44: TX buffer, can also be changed via lilo or insmod.
45: (BCH, 7/31/96)
46:
47: 0.08 Implement 32-bit I/O for the 82595TX and 82595FX
48: based lan cards. Disable full-duplex mode if TPE
49: is not used. (BCH, 4/8/96)
50:
51: 0.07a Fix a stat report which counts every packet as a
52: heart-beat failure. (BCH, 6/3/95)
53:
54: 0.07 Modified to support all other 82595-based lan cards.
55: The IRQ vector of the EtherExpress Pro will be set
56: according to the value saved in the EEPROM. For other
57: cards, I will do autoirq_request() to grab the next
58: available interrupt vector. (BCH, 3/17/95)
59:
60: 0.06a,b Interim released. Minor changes in the comments and
61: print out format. (BCH, 3/9/95 and 3/14/95)
62:
63: 0.06 First stable release that I am comfortable with. (BCH,
64: 3/2/95)
65:
66: 0.05 Complete testing of multicast. (BCH, 2/23/95)
67:
68: 0.04 Adding multicast support. (BCH, 2/14/95)
69:
70: 0.03 First widely alpha release for public testing.
71: (BCH, 2/14/95)
72:
73: */
74:
75: static const char *version =
76: "eepro.c: v0.10c 9/28/98 Bao C. Ha ([email protected])\n";
77:
78: #include <linux/module.h>
79:
80: /*
81: Sources:
82:
83: This driver wouldn't have been written without the availability
84: of the Crynwr's Lan595 driver source code. It helps me to
85: familiarize with the 82595 chipset while waiting for the Intel
86: documentation. I also learned how to detect the 82595 using
87: the packet driver's technique.
88:
89: This driver is written by cutting and pasting the skeleton.c driver
90: provided by Donald Becker. I also borrowed the EEPROM routine from
91: Donald Becker's 82586 driver.
92:
93: Datasheet for the Intel 82595 (including the TX and FX version). It
94: provides just enough info that the casual reader might think that it
95: documents the i82595.
96:
97: The User Manual for the 82595. It provides a lot of the missing
98: information.
99:
100: */
101:
102: #include <linux/kernel.h>
103: #include <linux/sched.h>
104: #include <linux/types.h>
105: #include <linux/fcntl.h>
106: #include <linux/interrupt.h>
107: #include <linux/ptrace.h>
108: #include <linux/ioport.h>
109: #include <linux/in.h>
110: #include <linux/malloc.h>
111: #include <linux/string.h>
112: #include <asm/system.h>
113: #include <asm/bitops.h>
114: #include <asm/io.h>
115: #include <asm/dma.h>
116: #include <linux/errno.h>
117:
118: #include <linux/netdevice.h>
119: #include <linux/etherdevice.h>
120: #include <linux/skbuff.h>
121:
122: /* First, a few definitions that the brave might change. */
123:
124: /* A zero-terminated list of I/O addresses to be probed. */
125: static unsigned int eepro_portlist[] =
126: { 0x300, 0x240, 0x280, 0x2C0, 0x200, 0x320, 0x340, 0x360, 0};
127:
128: /* use 0 for production, 1 for verification, >2 for debug */
129:
130: #ifndef NET_DEBUG
131: #define NET_DEBUG 1
132: #endif
133:
134: static unsigned int net_debug = NET_DEBUG;
135:
136: /* The number of low I/O ports used by the ethercard. */
137:
138: #define EEPRO_IO_EXTENT 16
139:
140: /* Different 82595 chips */
141:
142: #define LAN595 0
143: #define LAN595TX 1
144: #define LAN595FX 2
145:
146: /* Information that need to be kept for each board. */
147: struct eepro_local {
148: struct enet_statistics stats;
149: unsigned rx_start;
150: unsigned tx_start; /* start of the transmit chain */
151: int tx_last; /* pointer to last packet in the transmit chain */
152: unsigned tx_end; /* end of the transmit chain (plus 1) */
153: int eepro; /* 1 for the EtherExpress Pro/10,
154: 2 for the EtherExpress Pro/10+,
155: 0 for other 82595-based lan cards. */
156: int version; /* a flag to indicate if this is a TX or FX
157: version of the 82595 chip. */
158: int stepping;
159: };
160:
161: /* The station (ethernet) address prefix, used for IDing the board. */
162:
163: #define SA_ADDR0 0x00 /* Etherexpress Pro/10 */
164: #define SA_ADDR1 0xaa
165: #define SA_ADDR2 0x00
166:
167: #define SA2_ADDR0 0x00 /* Etherexpress Pro/10+ */
168: #define SA2_ADDR1 0xa0
169: #define SA2_ADDR2 0xc9
170:
171: #define SA3_ADDR0 0x00 /* more Etherexpress Pro/10+ */
172: #define SA3_ADDR1 0xaa
173: #define SA3_ADDR2 0x00
174: #define SA3_ADDR3 0xc9
175:
176: /* Index to functions, as function prototypes. */
177:
178: extern int eepro_probe(struct device *dev);
179:
180: static int eepro_probe1(struct device *dev, short ioaddr);
181: static int eepro_open(struct device *dev);
182: static int eepro_send_packet(struct sk_buff *skb, struct device *dev);
183: static void eepro_interrupt(int irq, void *dev_id, struct pt_regs *regs);
184: static void eepro_rx(struct device *dev);
185: static void eepro_transmit_interrupt(struct device *dev);
186: static int eepro_close(struct device *dev);
187: static struct enet_statistics *eepro_get_stats(struct device *dev);
188: static void set_multicast_list(struct device *dev);
189:
190: static int read_eeprom(int ioaddr, int location);
191: static void hardware_send_packet(struct device *dev, void *buf, short length);
192: static int eepro_grab_irq(struct device *dev);
193:
194: /*
195: Details of the i82595.
196:
197: You will need either the datasheet or the user manual to understand what
198: is going on here. The 82595 is very different from the 82586, 82593.
199:
200: The receive algorithm in eepro_rx() is just an implementation of the
201: RCV ring structure that the Intel 82595 imposes at the hardware level.
202: The receive buffer is set at 24K, and the transmit buffer is 8K. I
203: am assuming that the total buffer memory is 32K, which is true for the
204: Intel EtherExpress Pro/10. If it is less than that on a generic card,
205: the driver will be broken.
206:
207: The transmit algorithm in the hardware_send_packet() is similar to the
208: one in the eepro_rx(). The transmit buffer is a ring linked list.
209: I just queue the next available packet to the end of the list. In my
210: system, the 82595 is so fast that the list seems to always contain a
211: single packet. In other systems with faster computers and more congested
212: network traffics, the ring linked list should improve performance by
213: allowing up to 8K worth of packets to be queued.
214:
215: The sizes of the receive and transmit buffers can now be changed via lilo
216: or insmod. Lilo uses the appended line "ether=io,irq,debug,rx-buffer,eth0"
217: where rx-buffer is in KB unit. Modules uses the parameter mem which is
218: also in KB unit, for example "insmod io=io-address irq=0 mem=rx-buffer."
219: The receive buffer has to be more than 3K or less than 29K. Otherwise,
220: it is reset to the default of 24K, and, hence, 8K for the trasnmit
221: buffer (transmit-buffer = 32K - receive-buffer).
222:
223: */
224:
225: #define RAM_SIZE 0x8000
226: #define RCV_HEADER 8
227: #define RCV_RAM 0x6000 /* 24KB default for RCV buffer */
228: #define RCV_LOWER_LIMIT 0x00 /* 0x0000 */
229:
230: /* #define RCV_UPPER_LIMIT ((RCV_RAM - 2) >> 8) */ /* 0x5ffe */
231: #define RCV_UPPER_LIMIT (((rcv_ram) - 2) >> 8)
232:
233: /* #define XMT_RAM (RAM_SIZE - RCV_RAM) */ /* 8KB for XMT buffer */
234: #define XMT_RAM (RAM_SIZE - (rcv_ram)) /* 8KB for XMT buffer */
235:
236: /* #define XMT_LOWER_LIMIT (RCV_RAM >> 8) */ /* 0x6000 */
237: #define XMT_LOWER_LIMIT ((rcv_ram) >> 8)
238: #define XMT_UPPER_LIMIT ((RAM_SIZE - 2) >> 8) /* 0x7ffe */
239: #define XMT_HEADER 8
240:
241: #define RCV_DONE 0x0008
242: #define RX_OK 0x2000
243: #define RX_ERROR 0x0d81
244:
245: #define TX_DONE_BIT 0x0080
246: #define CHAIN_BIT 0x8000
247: #define XMT_STATUS 0x02
248: #define XMT_CHAIN 0x04
249: #define XMT_COUNT 0x06
250:
251: #define BANK0_SELECT 0x00
252: #define BANK1_SELECT 0x40
253: #define BANK2_SELECT 0x80
254:
255: /* Bank 0 registers */
256:
257: #define COMMAND_REG 0x00 /* Register 0 */
258: #define MC_SETUP 0x03
259: #define XMT_CMD 0x04
260: #define DIAGNOSE_CMD 0x07
261: #define RCV_ENABLE_CMD 0x08
262: #define RCV_DISABLE_CMD 0x0a
263: #define STOP_RCV_CMD 0x0b
264: #define RESET_CMD 0x0e
265: #define POWER_DOWN_CMD 0x18
266: #define RESUME_XMT_CMD 0x1c
267: #define SEL_RESET_CMD 0x1e
268: #define STATUS_REG 0x01 /* Register 1 */
269: #define RX_INT 0x02
270: #define TX_INT 0x04
271: #define EXEC_STATUS 0x30
272: #define ID_REG 0x02 /* Register 2 */
273: #define R_ROBIN_BITS 0xc0 /* round robin counter */
274: #define ID_REG_MASK 0x2c
275: #define ID_REG_SIG 0x24
276: #define AUTO_ENABLE 0x10
277: #define INT_MASK_REG 0x03 /* Register 3 */
278: #define RX_STOP_MASK 0x01
279: #define RX_MASK 0x02
280: #define TX_MASK 0x04
281: #define EXEC_MASK 0x08
282: #define ALL_MASK 0x0f
283: #define IO_32_BIT 0x10
284: #define RCV_BAR 0x04 /* The following are word (16-bit) registers */
285: #define RCV_STOP 0x06
286: #define XMT_BAR 0x0a
287: #define HOST_ADDRESS_REG 0x0c
288: #define IO_PORT 0x0e
289: #define IO_PORT_32_BIT 0x0c
290:
291: /* Bank 1 registers */
292:
293: #define REG1 0x01
294: #define WORD_WIDTH 0x02
295: #define INT_ENABLE 0x80
296: #define INT_NO_REG 0x02
297: #define RCV_LOWER_LIMIT_REG 0x08
298: #define RCV_UPPER_LIMIT_REG 0x09
299: #define XMT_LOWER_LIMIT_REG 0x0a
300: #define XMT_UPPER_LIMIT_REG 0x0b
301:
302: /* Bank 2 registers */
303:
304: #define XMT_Chain_Int 0x20 /* Interrupt at the end of the transmit chain */
305: #define XMT_Chain_ErrStop 0x40 /* Interrupt at the end of the chain even if there are errors */
306: #define RCV_Discard_BadFrame 0x80 /* Throw bad frames away, and continue to receive others */
307: #define REG2 0x02
308: #define PRMSC_Mode 0x01
309: #define Multi_IA 0x20
310: #define REG3 0x03
311: #define TPE_BIT 0x04
312: #define BNC_BIT 0x20
313: #define REG13 0x0d
314: #define FDX 0x00
315: #define A_N_ENABLE 0x02
316:
317: #define I_ADD_REG0 0x04
318: #define I_ADD_REG1 0x05
319: #define I_ADD_REG2 0x06
320: #define I_ADD_REG3 0x07
321: #define I_ADD_REG4 0x08
322: #define I_ADD_REG5 0x09
323:
324: #define EEPROM_REG 0x0a
325: #define EESK 0x01
326: #define EECS 0x02
327: #define EEDI 0x04
328: #define EEDO 0x08
329:
330: /* Check for a network adaptor of this type, and return '0' if one exists.
331:
332: If dev->base_addr == 0, probe all likely locations.
333: If dev->base_addr == 1, always return failure.
334: If dev->base_addr == 2, allocate space for the device and return success
335: (detachable devices only).
336:
337: */
338:
339: #ifdef HAVE_DEVLIST
340:
341: /* Support for a alternate probe manager, which will eliminate the
342: boilerplate below. */
343:
344: struct netdev_entry netcard_drv =
345: {"eepro", eepro_probe1, EEPRO_IO_EXTENT, eepro_portlist};
346:
347: #else
348:
349: int
350: eepro_probe(struct device *dev)
351: {
352: int i;
353: int base_addr = dev ? dev->base_addr : 0;
354:
355: if (base_addr > 0x1ff) /* Check a single specified location. */
356: return eepro_probe1(dev, base_addr);
357: else if (base_addr != 0) /* Don't probe at all. */
358: return ENXIO;
359:
360: for (i = 0; eepro_portlist[i]; i++) {
361: int ioaddr = eepro_portlist[i];
362: if (check_region(ioaddr, EEPRO_IO_EXTENT))
363: continue;
364:
365: if (eepro_probe1(dev, ioaddr) == 0)
366: return 0;
367: }
368:
369: return ENODEV;
370: }
371: #endif
372:
373: /* This is the real probe routine. Linux has a history of friendly device
374: probes on the ISA bus. A good device probes avoids doing writes, and
375: verifies that the correct device exists and functions. */
376:
377: int
378: eepro_probe1(struct device *dev, short ioaddr)
379: {
380: unsigned short station_addr[6], id, counter;
381: int i;
382: int eepro;
383: const char *ifmap[] = {"AUI", "10Base2", "10BaseT"};
384: enum iftype { AUI=0, BNC=1, TPE=2 };
385:
386: /* Now, we are going to check for the signature of the
387: ID_REG (register 2 of bank 0) */
388: if (((id=inb(ioaddr + ID_REG)) & ID_REG_MASK) == ID_REG_SIG) {
389:
390: /* We seem to have the 82595 signature, let's
391: play with its counter (last 2 bits of
392: register 2 of bank 0) to be sure. */
393:
394: counter = (id & R_ROBIN_BITS);
395: if (((id=inb(ioaddr+ID_REG)) & R_ROBIN_BITS) ==
396: (counter + 0x40)) {
397:
398: /* Yes, the 82595 has been found */
399:
400: /* Now, get the ethernet hardware address from
401: the EEPROM */
402:
403: station_addr[0] = read_eeprom(ioaddr, 2);
404: station_addr[1] = read_eeprom(ioaddr, 3);
405: station_addr[2] = read_eeprom(ioaddr, 4);
406:
407: /* Check the station address for the manufacturer's code */
408:
409: if ((station_addr[2] == 0x00aa) && (station_addr[1]!= 0x00c9)) {
410: eepro = 1;
411: printk("%s: Intel EtherExpress Pro/10 ISA at %#x,",
412: dev->name, ioaddr);
413: } else
414: if ( (station_addr[2] == 0x00a0)
415: || ((station_addr[2] == 0x00aa) && (station_addr[1] == 0x00c9) )) {
416: eepro = 2;
417: printk("%s: Intel EtherExpress Pro/10+ ISA\n at %#x,",
418: dev->name, ioaddr);
419: }
420: else {
421: eepro = 0;
422: printk("%s: Intel 82595-based lan card at %#x,",
423: dev->name, ioaddr);
424: }
425:
426: /* Fill in the 'dev' fields. */
427: dev->base_addr = ioaddr;
428:
429: for (i=0; i < 6; i++) {
430: dev->dev_addr[i] = ((unsigned char *) station_addr)[5-i];
431: printk("%c%02x", i ? ':' : ' ', dev->dev_addr[i]);
432: }
433:
434: if ((dev->mem_end & 0x3f) < 3 || /* RX buffer must be more than 3K */
435: (dev->mem_end & 0x3f) > 29) /* and less than 29K */
436: dev->mem_end = RCV_RAM; /* or it will be set to 24K */
437: else dev->mem_end = 1024*dev->mem_end; /* Maybe I should shift << 10 */
438:
439: /* From now on, dev->mem_end contains the actual size of rx buffer */
440:
441: if (net_debug > 3)
442: printk(", %dK RCV buffer", (int)(dev->mem_end)/1024);
443:
444: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
445: id = inb(ioaddr + REG3);
446: if (id & TPE_BIT)
447: dev->if_port = TPE;
448: else dev->if_port = BNC;
449:
450: if (net_debug>3)
451: printk("id: %x\n", id);
452:
453: if (dev->irq < 2 && eepro) {
454: i = read_eeprom(ioaddr, 1);
455: if (eepro == 1)
456: switch (i & 0x07) {
457: case 0: dev->irq = 9; break;
458: case 1: dev->irq = 3; break;
459: case 2: dev->irq = 5; break;
460: case 3: dev->irq = 10; break;
461: case 4: dev->irq = 11; break;
462: default: /* should never get here !!!!! */
463: printk(" illegal interrupt vector stored in EEPROM.\n");
464: return ENODEV;
465: }
466: else switch (i & 0x07) {
467: case 0: dev->irq = 3; break;
468: case 1: dev->irq = 4; break;
469: case 2: dev->irq = 5; break;
470: case 3: dev->irq = 7; break;
471: case 4: dev->irq = 9; break;
472: case 5: dev->irq = 10; break;
473: case 6: dev->irq = 11; break;
474: case 7: dev->irq = 12; break;
475: }
476: }
477: else if (dev->irq == 2)
478: dev->irq = 9;
479:
480: if (dev->irq > 2) {
481: printk(", IRQ %d, %s.\n", dev->irq,
482: ifmap[dev->if_port]);
483: if (request_irq(dev->irq, &eepro_interrupt, 0, "eepro", NULL)) {
484: printk("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
485: return -EAGAIN;
486: }
487: }
488: else printk(", %s.\n", ifmap[dev->if_port]);
489:
490: if ((dev->mem_start & 0xf) > 0) /* I don't know if this is */
491: net_debug = dev->mem_start & 7; /* still useful or not */
492:
493: if (net_debug > 3) {
494: i = read_eeprom(ioaddr, 5);
495: if (i & 0x2000) /* bit 13 of EEPROM word 5 */
496: printk("%s: Concurrent Processing is enabled but not used!\n",
497: dev->name);
498: }
499:
500: if (net_debug)
501: printk(version);
502:
503: /* Grab the region so we can find another board if autoIRQ fails. */
504: request_region(ioaddr, EEPRO_IO_EXTENT, "eepro");
505:
506: /* Initialize the device structure */
507: dev->priv = kmalloc(sizeof(struct eepro_local), GFP_KERNEL);
508: if (dev->priv == NULL)
509: return -ENOMEM;
510: memset(dev->priv, 0, sizeof(struct eepro_local));
511:
512: dev->open = eepro_open;
513: dev->stop = eepro_close;
514: dev->hard_start_xmit = eepro_send_packet;
515: dev->get_stats = eepro_get_stats;
516: dev->set_multicast_list = &set_multicast_list;
517:
518: /* Fill in the fields of the device structure with
519: ethernet generic values */
520:
521: ether_setup(dev);
522:
523: outb(RESET_CMD, ioaddr); /* RESET the 82595 */
524:
525: return 0;
526: }
527: else return ENODEV;
528: }
529: else if (net_debug > 3)
530: printk ("EtherExpress Pro probed failed!\n");
531: return ENODEV;
532: }
533:
534: /* Open/initialize the board. This is called (in the current kernel)
535: sometime after booting when the 'ifconfig' program is run.
536:
537: This routine should set everything up anew at each open, even
538: registers that "should" only need to be set once at boot, so that
539: there is non-reboot way to recover if something goes wrong.
540: */
541:
542: static char irqrmap[] = {-1,-1,0,1,-1,2,-1,-1,-1,0,3,4,-1,-1,-1,-1};
543: static char irqrmap2[] = {-1,-1,4,0,1,2,-1,3,-1,4,5,6,7,-1,-1,-1};
544:
545: static int
546: eepro_grab_irq(struct device *dev)
547: {
548: int irqlist[] = { 3, 4, 5, 7, 9, 10, 11, 12 };
549: int *irqp = irqlist, temp_reg, ioaddr = dev->base_addr;
550:
551: outb(BANK1_SELECT, ioaddr); /* be CAREFUL, BANK 1 now */
552:
553: /* Enable the interrupt line. */
554: temp_reg = inb(ioaddr + REG1);
555: outb(temp_reg | INT_ENABLE, ioaddr + REG1);
556:
557: outb(BANK0_SELECT, ioaddr); /* be CAREFUL, BANK 0 now */
558:
559: /* clear all interrupts */
560: outb(ALL_MASK, ioaddr + STATUS_REG);
561:
562: /* Let EXEC event to interrupt */
563: outb(ALL_MASK & ~(EXEC_MASK), ioaddr + INT_MASK_REG);
564:
565: do {
566: outb(BANK1_SELECT, ioaddr); /* be CAREFUL, BANK 1 now */
567: temp_reg = inb(ioaddr + INT_NO_REG);
568: outb((temp_reg & 0xf8) | irqrmap[*irqp], ioaddr + INT_NO_REG);
569: outb(BANK0_SELECT, ioaddr); /* Switch back to Bank 0 */
570: if (request_irq (*irqp, NULL, 0, "bogus", NULL) != EBUSY) {
571: /* Twinkle the interrupt, and check if it's seen */
572: autoirq_setup(0);
573: outb(DIAGNOSE_CMD, ioaddr); /* RESET the 82595 */
574:
575: if (*irqp == autoirq_report(2) && /* It's a good IRQ line */
576: (request_irq(dev->irq = *irqp, &eepro_interrupt, 0, "eepro", NULL) == 0))
577: break;
578: /* clear all interrupts */
579: outb(ALL_MASK, ioaddr + STATUS_REG);
580: }
581: } while (*++irqp);
582:
583: outb(BANK1_SELECT, ioaddr); /* Switch back to Bank 1 */
584:
585: /* Disable the physical interrupt line. */
586: temp_reg = inb(ioaddr + REG1);
587: outb(temp_reg & 0x7f, ioaddr + REG1);
588: outb(BANK0_SELECT, ioaddr); /* Switch back to Bank 0 */
589:
590: /* Mask all the interrupts. */
591: outb(ALL_MASK, ioaddr + INT_MASK_REG);
592:
593: /* clear all interrupts */
594: outb(ALL_MASK, ioaddr + STATUS_REG);
595:
596: return dev->irq;
597: }
598:
599: static int
600: eepro_open(struct device *dev)
601: {
602: unsigned short temp_reg, old8, old9;
603: int i, ioaddr = dev->base_addr, rcv_ram = dev->mem_end;
604: struct eepro_local *lp = (struct eepro_local *)dev->priv;
605:
606: if (net_debug > 3)
607: printk("eepro: entering eepro_open routine.\n");
608:
609: if ((dev->dev_addr[0] == SA_ADDR0 &&
610: dev->dev_addr[1] == SA_ADDR1 &&
611: dev->dev_addr[2] == SA_ADDR2)&&
612: (dev->dev_addr[3] != SA3_ADDR3))
613: {
614: lp->eepro = 1;
615: if (net_debug > 3) printk("p->eepro = 1;\n");
616: } /* Yes, an Intel EtherExpress Pro/10 */
617:
618: else if ((dev->dev_addr[0] == SA2_ADDR0 &&
619: dev->dev_addr[1] == SA2_ADDR1 &&
620: dev->dev_addr[2] == SA2_ADDR2)||
621: (dev->dev_addr[0] == SA3_ADDR0 &&
622: dev->dev_addr[1] == SA3_ADDR1 &&
623: dev->dev_addr[2] == SA3_ADDR2 &&
624: dev->dev_addr[3] == SA3_ADDR3))
625: {
626: lp->eepro = 2; /* Yes, an Intel EtherExpress Pro/10+ */
627: if (net_debug > 3) printk("p->eepro = 2;\n");
628: }
629:
630: else lp->eepro = 0; /* No, it is a generic 82585 lan card */
631:
632: /* Get the interrupt vector for the 82595 */
633: if (dev->irq < 2 && eepro_grab_irq(dev) == 0) {
634: printk("%s: unable to get IRQ %d.\n", dev->name, dev->irq);
635: return -EAGAIN;
636: }
637:
638: if (irq2dev_map[dev->irq] != 0
639: || (irq2dev_map[dev->irq] = dev) == 0)
640: return -EAGAIN;
641:
642: /* Initialize the 82595. */
643: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
644: temp_reg = inb(ioaddr + EEPROM_REG);
645: lp->stepping = temp_reg >> 5; /* Get the stepping number of the 595 */
646:
647: if (net_debug > 3)
648: printk("The stepping of the 82595 is %d\n", lp->stepping);
649: if (temp_reg & 0x10) /* Check the TurnOff Enable bit */
650: outb(temp_reg & 0xef, ioaddr + EEPROM_REG);
651: for (i=0; i < 6; i++)
652: outb(dev->dev_addr[i] , ioaddr + I_ADD_REG0 + i);
653:
654: temp_reg = inb(ioaddr + REG1); /* Setup Transmit Chaining */
655: outb(temp_reg | XMT_Chain_Int | XMT_Chain_ErrStop /* and discard bad RCV frames */
656: | RCV_Discard_BadFrame, ioaddr + REG1);
657: temp_reg = inb(ioaddr + REG2); /* Match broadcast */
658: outb(temp_reg | 0x14, ioaddr + REG2);
659: temp_reg = inb(ioaddr + REG3);
660: outb(temp_reg & 0x3f, ioaddr + REG3); /* clear test mode */
661:
662: /* Set the receiving mode */
663: outb(BANK1_SELECT, ioaddr); /* be CAREFUL, BANK 1 now */
664:
665: /* Set the interrupt vector */
666: temp_reg = inb(ioaddr + INT_NO_REG);
667:
668: if (lp->eepro == 2)
669: outb((temp_reg & 0xf8) | irqrmap2[dev->irq], ioaddr + INT_NO_REG);
670: else outb((temp_reg & 0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);
671:
672: temp_reg = inb(ioaddr + INT_NO_REG);
673:
674: if (lp->eepro == 2)
675: outb((temp_reg & 0xf0) | irqrmap2[dev->irq] | 0x08,ioaddr+INT_NO_REG);
676: else outb((temp_reg & 0xf8) | irqrmap[dev->irq], ioaddr + INT_NO_REG);
677:
678: if (net_debug > 3)
679: printk("eepro_open: content of INT Reg is %x\n", temp_reg);
680:
681:
682: /* Initialize the RCV and XMT upper and lower limits */
683: outb(RCV_LOWER_LIMIT, ioaddr + RCV_LOWER_LIMIT_REG);
684: outb(RCV_UPPER_LIMIT, ioaddr + RCV_UPPER_LIMIT_REG);
685: outb(XMT_LOWER_LIMIT, ioaddr + XMT_LOWER_LIMIT_REG);
686: outb(XMT_UPPER_LIMIT, ioaddr + XMT_UPPER_LIMIT_REG);
687:
688: /* Enable the interrupt line. */
689: temp_reg = inb(ioaddr + REG1);
690: outb(temp_reg | INT_ENABLE, ioaddr + REG1);
691: outb(BANK0_SELECT, ioaddr); /* Switch back to Bank 0 */
692:
693: /* Let RX and TX events to interrupt */
694: outb(ALL_MASK & ~(RX_MASK | TX_MASK), ioaddr + INT_MASK_REG);
695:
696: /* clear all interrupts */
697: outb(ALL_MASK, ioaddr + STATUS_REG);
698:
699: /* Initialize RCV */
700: outw(RCV_LOWER_LIMIT << 8, ioaddr + RCV_BAR);
701: lp->rx_start = (RCV_LOWER_LIMIT << 8) ;
702: outw((RCV_UPPER_LIMIT << 8) | 0xfe, ioaddr + RCV_STOP);
703:
704: /* Initialize XMT */
705: outw(XMT_LOWER_LIMIT << 8, ioaddr + XMT_BAR);
706:
707: /* Check for the i82595TX and i82595FX */
708: old8 = inb(ioaddr + 8);
709: outb(~old8, ioaddr + 8);
710:
711: if ((temp_reg = inb(ioaddr + 8)) == old8) {
712: if (net_debug > 3)
713: printk("i82595 detected!\n");
714: lp->version = LAN595;
715: }
716: else {
717: lp->version = LAN595TX;
718: outb(old8, ioaddr + 8);
719: old9 = inb(ioaddr + 9);
720: outb(~old9, ioaddr + 9);
721:
722: if (((temp_reg = inb(ioaddr + 9)) == ( (~old9)&0xff) )) {
723: enum iftype { AUI=0, BNC=1, TPE=2 };
724:
725: if (net_debug > 3) {
726: printk("temp_reg: %#x ~old9: %#x\n",temp_reg, ~old9);
727: printk("i82595FX detected!\n");
728: }
729:
730: lp->version = LAN595FX;
731: outb(old9, ioaddr + 9);
732:
733: if (dev->if_port != TPE) { /* Hopefully, this will fix the
734: problem of using Pentiums and
735: pro/10 w/ BNC. */
736: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
737: temp_reg = inb(ioaddr + REG13);
738:
739: /* disable the full duplex mode since it is not
740: applicable with the 10Base2 cable. */
741: outb(temp_reg & ~(FDX | A_N_ENABLE), REG13);
742: outb(BANK0_SELECT, ioaddr); /* be CAREFUL, BANK 0 now */
743: }
744: }
745: else if (net_debug > 3) {
746: printk("temp_reg: %#x ~old9: %#x\n",temp_reg,((~old9)&0xff));
747: printk("i82595TX detected!\n");
748: }
749: }
750:
751: outb(SEL_RESET_CMD, ioaddr);
752:
753: /* We are supposed to wait for 2 us after a SEL_RESET */
754: SLOW_DOWN_IO;
755: SLOW_DOWN_IO;
756:
757: lp->tx_start = lp->tx_end = XMT_LOWER_LIMIT << 8; /* or = RCV_RAM */
758: lp->tx_last = 0;
759:
760: dev->tbusy = 0;
761: dev->interrupt = 0;
762: dev->start = 1;
763:
764: if (net_debug > 3)
765: printk("eepro: exiting eepro_open routine.\n");
766:
767: outb(RCV_ENABLE_CMD, ioaddr);
768: MOD_INC_USE_COUNT;
769:
770: return 0;
771: }
772:
773: static int
774: eepro_send_packet(struct sk_buff *skb, struct device *dev)
775: {
776: struct eepro_local *lp = (struct eepro_local *)dev->priv;
777: int ioaddr = dev->base_addr;
778: int rcv_ram = dev->mem_end;
779:
780: if (net_debug > 5)
781: printk("eepro: entering eepro_send_packet routine.\n");
782:
783: if (dev->tbusy) {
784: /* If we get here, some higher level has decided we are broken.
785: There should really be a "kick me" function call instead. */
786:
787: int tickssofar = jiffies - dev->trans_start;
788:
789: if (tickssofar < 40)
790: return 1;
791:
792: if (net_debug > 1)
793: printk("%s: transmit timed out, %s?\n", dev->name,
794: "network cable problem");
795:
796: lp->stats.tx_errors++;
797:
798: /* Try to restart the adaptor. */
799: outb(SEL_RESET_CMD, ioaddr);
800:
801: /* We are supposed to wait for 2 us after a SEL_RESET */
802: SLOW_DOWN_IO;
803: SLOW_DOWN_IO;
804:
805: /* Do I also need to flush the transmit buffers here? YES? */
806: lp->tx_start = lp->tx_end = rcv_ram;
807: lp->tx_last = 0;
808:
809: dev->tbusy=0;
810: dev->trans_start = jiffies;
811: outb(RCV_ENABLE_CMD, ioaddr);
812: }
813:
814: /* If some higher layer thinks we've missed an tx-done interrupt
815: we are passed NULL. Caution: dev_tint() handles the cli()/sti()
816: itself. */
817:
818: if (skb == NULL) {
819: dev_tint(dev);
820: return 0;
821: }
822:
823: /* Block a timer-based transmit from overlapping. */
824:
825: if (set_bit(0, (void*)&dev->tbusy) != 0)
826: printk("%s: Transmitter access conflict.\n", dev->name);
827: else {
828: short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
829: unsigned char *buf = skb->data;
830: hardware_send_packet(dev, buf, length);
831: dev->trans_start = jiffies;
832: }
833:
834: dev_kfree_skb (skb, FREE_WRITE);
835:
836: /* You might need to clean up and record Tx statistics here. */
837: /* lp->stats.tx_aborted_errors++; */
838:
839: if (net_debug > 5)
840: printk("eepro: exiting eepro_send_packet routine.\n");
841:
842: return 0;
843: }
844:
845: /* The typical workload of the driver:
846: Handle the network interface interrupts. */
847:
848: static void
849: eepro_interrupt(int irq, void *dev_id, struct pt_regs * regs)
850: {
851: struct device *dev = (struct device *)(irq2dev_map[irq]);
852: int ioaddr, status, boguscount = 20;
853:
854: if (net_debug > 5)
855: printk("eepro: entering eepro_interrupt routine.\n");
856:
857: if (dev == NULL) {
858: printk ("eepro_interrupt(): irq %d for unknown device.\n", irq);
859: return;
860: }
861:
862: dev->interrupt = 1;
863:
864: ioaddr = dev->base_addr;
865:
866: do {
867: status = inb(ioaddr + STATUS_REG);
868:
869: if (status & RX_INT) {
870: if (net_debug > 4)
871: printk("eepro: packet received interrupt.\n");
872: /* Acknowledge the RX_INT */
873: outb(RX_INT, ioaddr + STATUS_REG);
874: /* Get the received packets */
875: eepro_rx(dev);
876: }
877: else if (status & TX_INT) {
878: if (net_debug > 4)
879: printk("eepro: packet transmit interrupt.\n");
880: /* Acknowledge the TX_INT */
881: outb(TX_INT, ioaddr + STATUS_REG);
882: /* Process the status of transmitted packets */
883: eepro_transmit_interrupt(dev);
884: }
885:
886: } while ((boguscount-- > 0) && (status & 0x06));
887:
888: dev->interrupt = 0;
889:
890: if (net_debug > 5)
891: printk("eepro: exiting eepro_interrupt routine.\n");
892:
893: return;
894: }
895:
896: static int
897: eepro_close(struct device *dev)
898: {
899: struct eepro_local *lp = (struct eepro_local *)dev->priv;
900: int ioaddr = dev->base_addr;
901: int rcv_ram = dev->mem_end;
902: short temp_reg;
903:
904: dev->tbusy = 1;
905: dev->start = 0;
906:
907: outb(BANK1_SELECT, ioaddr); /* Switch back to Bank 1 */
908:
909: /* Disable the physical interrupt line. */
910: temp_reg = inb(ioaddr + REG1);
911: outb(temp_reg & 0x7f, ioaddr + REG1);
912: outb(BANK0_SELECT, ioaddr); /* Switch back to Bank 0 */
913:
914: /* Flush the Tx and disable Rx. */
915: outb(STOP_RCV_CMD, ioaddr);
916:
917: lp->tx_start = lp->tx_end = rcv_ram ;
918: lp->tx_last = 0;
919:
920: /* Mask all the interrupts. */
921: outb(ALL_MASK, ioaddr + INT_MASK_REG);
922:
923: /* clear all interrupts */
924: outb(ALL_MASK, ioaddr + STATUS_REG);
925:
926: /* Reset the 82595 */
927: outb(RESET_CMD, ioaddr);
928:
929: /* release the interrupt */
930: free_irq(dev->irq, NULL);
931: irq2dev_map[dev->irq] = 0;
932:
933: /* Update the statistics here. What statistics? */
934: /* We are supposed to wait for 200 us after a RESET */
935: SLOW_DOWN_IO;
936: SLOW_DOWN_IO; /* May not be enough? */
937: MOD_DEC_USE_COUNT;
938:
939: return 0;
940: }
941:
942: /* Get the current statistics. This may be called with the card open or
943: closed. */
944: static struct enet_statistics *
945: eepro_get_stats(struct device *dev)
946: {
947: struct eepro_local *lp = (struct eepro_local *)dev->priv;
948: return &lp->stats;
949: }
950:
951: /* Set or clear the multicast filter for this adaptor.
952: */
953:
954: static void
955: set_multicast_list(struct device *dev)
956: {
957: struct eepro_local *lp = (struct eepro_local *)dev->priv;
958: short ioaddr = dev->base_addr;
959: unsigned short mode;
960: struct dev_mc_list *dmi=dev->mc_list;
961:
962: if (dev->flags&(IFF_ALLMULTI|IFF_PROMISC) || dev->mc_count > 63)
963: {
964: /*
965: * We must make the kernel realise we had to move
966: * into promisc mode or we start all out war on
967: * the cable. If it was a promisc request the
968: * flag is already set. If not we assert it.
969: */
970: dev->flags|=IFF_PROMISC;
971: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
972: mode = inb(ioaddr + REG2);
973: outb(mode | PRMSC_Mode, ioaddr + REG2);
974: mode = inb(ioaddr + REG3);
975: outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
976: outb(BANK0_SELECT, ioaddr); /* Return to BANK 0 now */
977: printk("%s: promiscuous mode enabled.\n", dev->name);
978: }
979:
980: else if (dev->mc_count==0 )
981: {
982: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
983: mode = inb(ioaddr + REG2);
984: outb(mode & 0xd6, ioaddr + REG2); /* Turn off Multi-IA and PRMSC_Mode bits */
985: mode = inb(ioaddr + REG3);
986: outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
987: outb(BANK0_SELECT, ioaddr); /* Return to BANK 0 now */
988: }
989:
990: else
991: {
992: unsigned short status, *eaddrs;
993: int i, boguscount = 0;
994:
995: /* Disable RX and TX interrupts. Necessary to avoid
996: corruption of the HOST_ADDRESS_REG by interrupt
997: service routines. */
998: outb(ALL_MASK, ioaddr + INT_MASK_REG);
999: outb(BANK2_SELECT, ioaddr); /* be CAREFUL, BANK 2 now */
1000: mode = inb(ioaddr + REG2);
1001: outb(mode | Multi_IA, ioaddr + REG2);
1002: mode = inb(ioaddr + REG3);
1003: outb(mode, ioaddr + REG3); /* writing reg. 3 to complete the update */
1004: outb(BANK0_SELECT, ioaddr); /* Return to BANK 0 now */
1005: outw(lp->tx_end, ioaddr + HOST_ADDRESS_REG);
1006: outw(MC_SETUP, ioaddr + IO_PORT);
1007: outw(0, ioaddr + IO_PORT);
1008: outw(0, ioaddr + IO_PORT);
1009: outw(6*(dev->mc_count + 1), ioaddr + IO_PORT);
1010:
1011: for (i = 0; i < dev->mc_count; i++)
1012: {
1013: eaddrs=(unsigned short *)dmi->dmi_addr;
1014: dmi=dmi->next;
1015: outw(*eaddrs++, ioaddr + IO_PORT);
1016: outw(*eaddrs++, ioaddr + IO_PORT);
1017: outw(*eaddrs++, ioaddr + IO_PORT);
1018: }
1019:
1020: eaddrs = (unsigned short *) dev->dev_addr;
1021: outw(eaddrs[0], ioaddr + IO_PORT);
1022: outw(eaddrs[1], ioaddr + IO_PORT);
1023: outw(eaddrs[2], ioaddr + IO_PORT);
1024: outw(lp->tx_end, ioaddr + XMT_BAR);
1025: outb(MC_SETUP, ioaddr);
1026:
1027: /* Update the transmit queue */
1028: i = lp->tx_end + XMT_HEADER + 6*(dev->mc_count + 1);
1029:
1030: if (lp->tx_start != lp->tx_end)
1031: {
1032: /* update the next address and the chain bit in the
1033: last packet */
1034: outw(lp->tx_last + XMT_CHAIN, ioaddr + HOST_ADDRESS_REG);
1035: outw(i, ioaddr + IO_PORT);
1036: outw(lp->tx_last + XMT_COUNT, ioaddr + HOST_ADDRESS_REG);
1037: status = inw(ioaddr + IO_PORT);
1038: outw(status | CHAIN_BIT, ioaddr + IO_PORT);
1039: lp->tx_end = i ;
1040: }
1041: else {
1042: lp->tx_start = lp->tx_end = i ;
1043: }
1044:
1045: /* Acknowledge that the MC setup is done */
1046: do { /* We should be doing this in the eepro_interrupt()! */
1047: SLOW_DOWN_IO;
1048: SLOW_DOWN_IO;
1049:
1050: if (inb(ioaddr + STATUS_REG) & 0x08)
1051: {
1052: i = inb(ioaddr);
1053: outb(0x08, ioaddr + STATUS_REG);
1054:
1055: if (i & 0x20) { /* command ABORTed */
1056: printk("%s: multicast setup failed.\n",
1057: dev->name);
1058: break;
1059: } else if ((i & 0x0f) == 0x03) { /* MC-Done */
1060: printk("%s: set Rx mode to %d addresses.\n",
1061: dev->name, dev->mc_count);
1062: break;
1063: }
1064: }
1065: } while (++boguscount < 100);
1066:
1067: /* Re-enable RX and TX interrupts */
1068: outb(ALL_MASK & ~(RX_MASK | TX_MASK), ioaddr + INT_MASK_REG);
1069:
1070: }
1071: outb(RCV_ENABLE_CMD, ioaddr);
1072: }
1073:
1074: /* The horrible routine to read a word from the serial EEPROM. */
1075: /* IMPORTANT - the 82595 will be set to Bank 0 after the eeprom is read */
1076: /* The delay between EEPROM clock transitions. */
1077:
1078: #define eeprom_delay() { int _i = 40; while (--_i > 0) { __SLOW_DOWN_IO; }}
1079: #define EE_READ_CMD (6 << 6)
1080:
1081: int
1082: read_eeprom(int ioaddr, int location)
1083: {
1084: int i;
1085: unsigned short retval = 0;
1086: short ee_addr = ioaddr + EEPROM_REG;
1087: int read_cmd = location | EE_READ_CMD;
1088: short ctrl_val = EECS ;
1089:
1090: outb(BANK2_SELECT, ioaddr);
1091: outb(ctrl_val, ee_addr);
1092:
1093: /* Shift the read command bits out. */
1094: for (i = 8; i >= 0; i--) {
1095: short outval = (read_cmd & (1 << i)) ? ctrl_val | EEDI
1096: : ctrl_val;
1097: outb(outval, ee_addr);
1098: outb(outval | EESK, ee_addr); /* EEPROM clock tick. */
1099: eeprom_delay();
1100: outb(outval, ee_addr); /* Finish EEPROM a clock tick. */
1101: eeprom_delay();
1102: }
1103: outb(ctrl_val, ee_addr);
1104:
1105: for (i = 16; i > 0; i--) {
1106: outb(ctrl_val | EESK, ee_addr); eeprom_delay();
1107: retval = (retval << 1) | ((inb(ee_addr) & EEDO) ? 1 : 0);
1108: outb(ctrl_val, ee_addr); eeprom_delay();
1109: }
1110: /* Terminate the EEPROM access. */
1111: ctrl_val &= ~EECS;
1112: outb(ctrl_val | EESK, ee_addr);
1113: eeprom_delay();
1114: outb(ctrl_val, ee_addr);
1115: eeprom_delay();
1116: outb(BANK0_SELECT, ioaddr);
1117: return retval;
1118: }
1119:
1120: static void
1121: hardware_send_packet(struct device *dev, void *buf, short length)
1122: {
1123: struct eepro_local *lp = (struct eepro_local *)dev->priv;
1124: short ioaddr = dev->base_addr;
1125: int rcv_ram = dev->mem_end;
1126: unsigned status, tx_available, last, end, boguscount = 100;
1127:
1128: if (net_debug > 5)
1129: printk("eepro: entering hardware_send_packet routine.\n");
1130:
1131: while (boguscount-- > 0) {
1132:
1133: /* Disable RX and TX interrupts. Necessary to avoid
1134: corruption of the HOST_ADDRESS_REG by interrupt
1135: service routines. */
1136: outb(ALL_MASK, ioaddr + INT_MASK_REG);
1137:
1138: if (dev->interrupt == 1) {
1139: /* Enable RX and TX interrupts */
1140: outb(ALL_MASK & ~(RX_MASK | TX_MASK), ioaddr + INT_MASK_REG);
1141: continue;
1142: }
1143:
1144: /* determine how much of the transmit buffer space is available */
1145: if (lp->tx_end > lp->tx_start)
1146: tx_available = XMT_RAM - (lp->tx_end - lp->tx_start);
1147: else if (lp->tx_end < lp->tx_start)
1148: tx_available = lp->tx_start - lp->tx_end;
1149: else tx_available = XMT_RAM;
1150:
1151: if (((((length + 3) >> 1) << 1) + 2*XMT_HEADER)
1152: >= tx_available) /* No space available ??? */
1153: {
1154: eepro_transmit_interrupt(dev); /* Clean up the transmiting queue */
1155: /* Enable RX and TX interrupts */
1156: outb(ALL_MASK & ~(RX_MASK | TX_MASK), ioaddr + INT_MASK_REG);
1157: continue;
1158: }
1159:
1160: last = lp->tx_end;
1161: end = last + (((length + 3) >> 1) << 1) + XMT_HEADER;
1162: if (end >= RAM_SIZE) { /* the transmit buffer is wrapped around */
1163:
1164: if ((RAM_SIZE - last) <= XMT_HEADER) {
1165: /* Arrrr!!!, must keep the xmt header together,
1166: several days were lost to chase this one down. */
1167: last = rcv_ram;
1168: end = last + (((length + 3) >> 1) << 1) + XMT_HEADER;
1169: }
1170:
1171: else end = rcv_ram + (end - RAM_SIZE);
1172: }
1173:
1174: outw(last, ioaddr + HOST_ADDRESS_REG);
1175: outw(XMT_CMD, ioaddr + IO_PORT);
1176: outw(0, ioaddr + IO_PORT);
1177: outw(end, ioaddr + IO_PORT);
1178: outw(length, ioaddr + IO_PORT);
1179:
1180: if (lp->version == LAN595)
1181: outsw(ioaddr + IO_PORT, buf, (length + 3) >> 1);
1182:
1183: else { /* LAN595TX or LAN595FX, capable of 32-bit I/O processing */
1184: unsigned short temp = inb(ioaddr + INT_MASK_REG);
1185: outb(temp | IO_32_BIT, ioaddr + INT_MASK_REG);
1186: outsl(ioaddr + IO_PORT_32_BIT, buf, (length + 3) >> 2);
1187: outb(temp & ~(IO_32_BIT), ioaddr + INT_MASK_REG);
1188: }
1189:
1190: /* A dummy read to flush the DRAM write pipeline */
1191: status = inw(ioaddr + IO_PORT);
1192:
1193: if (lp->tx_start == lp->tx_end) {
1194: outw(last, ioaddr + XMT_BAR);
1195: outb(XMT_CMD, ioaddr);
1196: lp->tx_start = last; /* I don't like to change tx_start here */
1197: }
1198: else {
1199: /* update the next address and the chain bit in the
1200: last packet */
1201:
1202: if (lp->tx_end != last) {
1203: outw(lp->tx_last + XMT_CHAIN, ioaddr + HOST_ADDRESS_REG);
1204: outw(last, ioaddr + IO_PORT);
1205: }
1206:
1207: outw(lp->tx_last + XMT_COUNT, ioaddr + HOST_ADDRESS_REG);
1208: status = inw(ioaddr + IO_PORT);
1209: outw(status | CHAIN_BIT, ioaddr + IO_PORT);
1210:
1211: /* Continue the transmit command */
1212: outb(RESUME_XMT_CMD, ioaddr);
1213: }
1214: lp->tx_last = last;
1215: lp->tx_end = end;
1216:
1217: /* Enable RX and TX interrupts */
1218: outb(ALL_MASK & ~(RX_MASK | TX_MASK), ioaddr + INT_MASK_REG);
1219:
1220: if (dev->tbusy) {
1221: dev->tbusy = 0;
1222: }
1223:
1224: if (net_debug > 5)
1225: printk("eepro: exiting hardware_send_packet routine.\n");
1226:
1227: return;
1228: }
1229: dev->tbusy = 1;
1230:
1231: if (net_debug > 5)
1232: printk("eepro: exiting hardware_send_packet routine.\n");
1233: }
1234:
1235: static void
1236: eepro_rx(struct device *dev)
1237: {
1238: struct eepro_local *lp = (struct eepro_local *)dev->priv;
1239: short ioaddr = dev->base_addr, rcv_ram = dev->mem_end;
1240: short boguscount = 20;
1241: short rcv_car = lp->rx_start;
1242: unsigned rcv_event, rcv_status, rcv_next_frame, rcv_size;
1243:
1244: if (net_debug > 5)
1245: printk("eepro: entering eepro_rx routine.\n");
1246:
1247: /* Set the read pointer to the start of the RCV */
1248: outw(rcv_car, ioaddr + HOST_ADDRESS_REG);
1249:
1250: rcv_event = inw(ioaddr + IO_PORT);
1251: while (rcv_event == RCV_DONE) {
1252:
1253: rcv_status = inw(ioaddr + IO_PORT);
1254: rcv_next_frame = inw(ioaddr + IO_PORT);
1255: rcv_size = inw(ioaddr + IO_PORT);
1256:
1257: if ((rcv_status & (RX_OK | RX_ERROR)) == RX_OK) {
1258:
1259: /* Malloc up new buffer. */
1260: struct sk_buff *skb;
1261: rcv_size &= 0x3fff;
1262: skb = dev_alloc_skb(rcv_size+5);
1263:
1264: if (skb == NULL) {
1265: printk("%s: Memory squeeze, dropping packet.\n", dev->name);
1266: lp->stats.rx_dropped++;
1267: break;
1268: }
1269:
1270: skb->dev = dev;
1271: skb_reserve(skb,2);
1272:
1273: if (lp->version == LAN595)
1274: insw(ioaddr+IO_PORT, skb_put(skb,rcv_size), (rcv_size + 3) >> 1);
1275:
1276: else { /* LAN595TX or LAN595FX, capable of 32-bit I/O processing */
1277: unsigned short temp = inb(ioaddr + INT_MASK_REG);
1278: outb(temp | IO_32_BIT, ioaddr + INT_MASK_REG);
1279: insl(ioaddr+IO_PORT_32_BIT, skb_put(skb,rcv_size), (rcv_size + 3) >> 2);
1280: outb(temp & ~(IO_32_BIT), ioaddr + INT_MASK_REG);
1281: }
1282:
1283: skb->protocol = eth_type_trans(skb,dev);
1284: netif_rx(skb);
1285: lp->stats.rx_packets++;
1286: }
1287:
1288: else { /* Not sure will ever reach here,
1289: I set the 595 to discard bad received frames */
1290: lp->stats.rx_errors++;
1291:
1292: if (rcv_status & 0x0100)
1293: lp->stats.rx_over_errors++;
1294:
1295: else if (rcv_status & 0x0400)
1296: lp->stats.rx_frame_errors++;
1297:
1298: else if (rcv_status & 0x0800)
1299: lp->stats.rx_crc_errors++;
1300:
1301: printk("%s: event = %#x, status = %#x, next = %#x, size = %#x\n",
1302: dev->name, rcv_event, rcv_status, rcv_next_frame, rcv_size);
1303: }
1304:
1305: if (rcv_status & 0x1000)
1306: lp->stats.rx_length_errors++;
1307:
1308: if (--boguscount == 0)
1309: break;
1310:
1311: rcv_car = lp->rx_start + RCV_HEADER + rcv_size;
1312: lp->rx_start = rcv_next_frame;
1313: outw(rcv_next_frame, ioaddr + HOST_ADDRESS_REG);
1314: rcv_event = inw(ioaddr + IO_PORT);
1315: }
1316: if (rcv_car == 0)
1317: rcv_car = (RCV_UPPER_LIMIT << 8) | 0xff;
1318:
1319: outw(rcv_car - 1, ioaddr + RCV_STOP);
1320:
1321: if (net_debug > 5)
1322: printk("eepro: exiting eepro_rx routine.\n");
1323: }
1324:
1325: static void
1326: eepro_transmit_interrupt(struct device *dev)
1327: {
1328: struct eepro_local *lp = (struct eepro_local *)dev->priv;
1329: short ioaddr = dev->base_addr;
1330: short boguscount = 20;
1331: short xmt_status;
1332:
1333: while (lp->tx_start != lp->tx_end) {
1334:
1335: outw(lp->tx_start, ioaddr + HOST_ADDRESS_REG);
1336: xmt_status = inw(ioaddr+IO_PORT);
1337:
1338: if ((xmt_status & TX_DONE_BIT) == 0) break;
1339:
1340: xmt_status = inw(ioaddr+IO_PORT);
1341: lp->tx_start = inw(ioaddr+IO_PORT);
1342: dev->tbusy = 0;
1343: mark_bh(NET_BH);
1344:
1345: if (xmt_status & 0x2000)
1346: lp->stats.tx_packets++;
1347: else {
1348: lp->stats.tx_errors++;
1349: if (xmt_status & 0x0400)
1350: lp->stats.tx_carrier_errors++;
1351: printk("%s: XMT status = %#x\n",
1352: dev->name, xmt_status);
1353: }
1354:
1355: if (xmt_status & 0x000f) {
1356: lp->stats.collisions += (xmt_status & 0x000f);
1357: }
1358:
1359: if ((xmt_status & 0x0040) == 0x0) {
1360: lp->stats.tx_heartbeat_errors++;
1361: }
1362:
1363: if (--boguscount == 0)
1364: break;
1365: }
1366: }
1367:
1368: #ifdef MODULE
1369:
1370: static char devicename[9] = { 0, };
1371: static struct device dev_eepro = {
1372: devicename, /* device name is inserted by linux/drivers/net/net_init.c */
1373: 0, 0, 0, 0,
1374: 0, 0,
1375: 0, 0, 0, NULL, eepro_probe };
1376: static int io = 0x200;
1377: static int irq = 0;
1378: static int mem = (RCV_RAM/1024); /* Size of the rx buffer in KB */
1379:
1380: int
1381: init_module(void)
1382: {
1383: if (io == 0)
1384: printk("eepro: You should not use auto-probing with insmod!\n");
1385:
1386: dev_eepro.base_addr = io;
1387: dev_eepro.irq = irq;
1388: dev_eepro.mem_end = mem;
1389:
1390: if (register_netdev(&dev_eepro) != 0)
1391: return -EIO;
1392:
1393: return 0;
1394: }
1395:
1396: void
1397: cleanup_module(void)
1398: {
1399: unregister_netdev(&dev_eepro);
1400:
1401: kfree_s(dev_eepro.priv,sizeof(struct eepro_local));
1402: dev_eepro.priv=NULL;
1403:
1404: /* If we don't do this, we can't re-insmod it later. */
1405: release_region(dev_eepro.base_addr, EEPRO_IO_EXTENT);
1406: }
1407: #endif /* MODULE */
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