1 /*
2 ns8382x.c: A U-Boot driver for the NatSemi DP8382[01].
3 ported by: Mark A. Rakes (mark_rakes@vivato.net)
4
5 Adapted from:
6 1. an Etherboot driver for DP8381[56] written by:
7 Copyright (C) 2001 Entity Cyber, Inc.
8
9 This development of this Etherboot driver was funded by
10 Sicom Systems: http://www.sicompos.com/
11
12 Author: Marty Connor (mdc@thinguin.org)
13 Adapted from a Linux driver which was written by Donald Becker
14
15 This software may be used and distributed according to the terms
16 of the GNU Public License (GPL), incorporated herein by reference.
17
18 2. A Linux driver by Donald Becker, ns820.c:
19 Written/copyright 1999-2002 by Donald Becker.
20
21 This software may be used and distributed according to the terms of
22 the GNU General Public License (GPL), incorporated herein by reference.
23 Drivers based on or derived from this code fall under the GPL and must
24 retain the authorship, copyright and license notice. This file is not
25 a complete program and may only be used when the entire operating
26 system is licensed under the GPL. License for under other terms may be
27 available. Contact the original author for details.
28
29 The original author may be reached as becker@scyld.com, or at
30 Scyld Computing Corporation
31 410 Severn Ave., Suite 210
32 Annapolis MD 21403
33
34 Support information and updates available at
35 http://www.scyld.com/network/netsemi.html
36
37 Datasheets available from:
38 http://www.national.com/pf/DP/DP83820.html
39 http://www.national.com/pf/DP/DP83821.html
40 */
41
42 /* Revision History
43 * October 2002 mar 1.0
44 * Initial U-Boot Release.
45 * Tested with Netgear GA622T (83820)
46 * and SMC9452TX (83821)
47 * NOTE: custom boards with these chips may (likely) require
48 * a programmed EEPROM device (if present) in order to work
49 * correctly.
50 */
51
52 /* Includes */
53 #include <common.h>
54 #include <malloc.h>
55 #include <net.h>
56 #include <netdev.h>
57 #include <asm/io.h>
58 #include <pci.h>
59
60 /* defines */
61 #define DSIZE 0x00000FFF
62 #define ETH_ALEN 6
63 #define CRC_SIZE 4
64 #define TOUT_LOOP 500000
65 #define TX_BUF_SIZE 1536
66 #define RX_BUF_SIZE 1536
67 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */
68
69 enum register_offsets {
70 ChipCmd = 0x00,
71 ChipConfig = 0x04,
72 EECtrl = 0x08,
73 IntrMask = 0x14,
74 IntrEnable = 0x18,
75 TxRingPtr = 0x20,
76 TxRingPtrHi = 0x24,
77 TxConfig = 0x28,
78 RxRingPtr = 0x30,
79 RxRingPtrHi = 0x34,
80 RxConfig = 0x38,
81 PriQueue = 0x3C,
82 RxFilterAddr = 0x48,
83 RxFilterData = 0x4C,
84 ClkRun = 0xCC,
85 PCIPM = 0x44,
86 };
87
88 enum ChipCmdBits {
89 ChipReset = 0x100,
90 RxReset = 0x20,
91 TxReset = 0x10,
92 RxOff = 0x08,
93 RxOn = 0x04,
94 TxOff = 0x02,
95 TxOn = 0x01
96 };
97
98 enum ChipConfigBits {
99 LinkSts = 0x80000000,
100 GigSpeed = 0x40000000,
101 HundSpeed = 0x20000000,
102 FullDuplex = 0x10000000,
103 TBIEn = 0x01000000,
104 Mode1000 = 0x00400000,
105 T64En = 0x00004000,
106 D64En = 0x00001000,
107 M64En = 0x00000800,
108 PhyRst = 0x00000400,
109 PhyDis = 0x00000200,
110 ExtStEn = 0x00000100,
111 BEMode = 0x00000001,
112 };
113 #define SpeedStatus_Polarity ( GigSpeed | HundSpeed | FullDuplex)
114
115 enum TxConfig_bits {
116 TxDrthMask = 0x000000ff,
117 TxFlthMask = 0x0000ff00,
118 TxMxdmaMask = 0x00700000,
119 TxMxdma_8 = 0x00100000,
120 TxMxdma_16 = 0x00200000,
121 TxMxdma_32 = 0x00300000,
122 TxMxdma_64 = 0x00400000,
123 TxMxdma_128 = 0x00500000,
124 TxMxdma_256 = 0x00600000,
125 TxMxdma_512 = 0x00700000,
126 TxMxdma_1024 = 0x00000000,
127 TxCollRetry = 0x00800000,
128 TxAutoPad = 0x10000000,
129 TxMacLoop = 0x20000000,
130 TxHeartIgn = 0x40000000,
131 TxCarrierIgn = 0x80000000
132 };
133
134 enum RxConfig_bits {
135 RxDrthMask = 0x0000003e,
136 RxMxdmaMask = 0x00700000,
137 RxMxdma_8 = 0x00100000,
138 RxMxdma_16 = 0x00200000,
139 RxMxdma_32 = 0x00300000,
140 RxMxdma_64 = 0x00400000,
141 RxMxdma_128 = 0x00500000,
142 RxMxdma_256 = 0x00600000,
143 RxMxdma_512 = 0x00700000,
144 RxMxdma_1024 = 0x00000000,
145 RxAcceptLenErr = 0x04000000,
146 RxAcceptLong = 0x08000000,
147 RxAcceptTx = 0x10000000,
148 RxStripCRC = 0x20000000,
149 RxAcceptRunt = 0x40000000,
150 RxAcceptErr = 0x80000000,
151 };
152
153 /* Bits in the RxMode register. */
154 enum rx_mode_bits {
155 RxFilterEnable = 0x80000000,
156 AcceptAllBroadcast = 0x40000000,
157 AcceptAllMulticast = 0x20000000,
158 AcceptAllUnicast = 0x10000000,
159 AcceptPerfectMatch = 0x08000000,
160 };
161
162 typedef struct _BufferDesc {
163 u32 link;
164 u32 bufptr;
165 vu_long cmdsts;
166 u32 extsts; /*not used here */
167 } BufferDesc;
168
169 /* Bits in network_desc.status */
170 enum desc_status_bits {
171 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000,
172 DescNoCRC = 0x10000000, DescPktOK = 0x08000000,
173 DescSizeMask = 0xfff,
174
175 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
176 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
177 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
178 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
179
180 DescRxAbort = 0x04000000, DescRxOver = 0x02000000,
181 DescRxDest = 0x01800000, DescRxLong = 0x00400000,
182 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000,
183 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000,
184 DescRxLoop = 0x00020000, DesRxColl = 0x00010000,
185 };
186
187 /* Bits in MEAR */
188 enum mii_reg_bits {
189 MDIO_ShiftClk = 0x0040,
190 MDIO_EnbOutput = 0x0020,
191 MDIO_Data = 0x0010,
192 };
193
194 /* PHY Register offsets. */
195 enum phy_reg_offsets {
196 BMCR = 0x00,
197 BMSR = 0x01,
198 PHYIDR1 = 0x02,
199 PHYIDR2 = 0x03,
200 ANAR = 0x04,
201 KTCR = 0x09,
202 };
203
204 /* basic mode control register bits */
205 enum bmcr_bits {
206 Bmcr_Reset = 0x8000,
207 Bmcr_Loop = 0x4000,
208 Bmcr_Speed0 = 0x2000,
209 Bmcr_AutoNegEn = 0x1000, /*if set ignores Duplex, Speed[01] */
210 Bmcr_RstAutoNeg = 0x0200,
211 Bmcr_Duplex = 0x0100,
212 Bmcr_Speed1 = 0x0040,
213 Bmcr_Force10H = 0x0000,
214 Bmcr_Force10F = 0x0100,
215 Bmcr_Force100H = 0x2000,
216 Bmcr_Force100F = 0x2100,
217 Bmcr_Force1000H = 0x0040,
218 Bmcr_Force1000F = 0x0140,
219 };
220
221 /* auto negotiation advertisement register */
222 enum anar_bits {
223 anar_adv_100F = 0x0100,
224 anar_adv_100H = 0x0080,
225 anar_adv_10F = 0x0040,
226 anar_adv_10H = 0x0020,
227 anar_ieee_8023 = 0x0001,
228 };
229
230 /* 1K-base T control register */
231 enum ktcr_bits {
232 ktcr_adv_1000H = 0x0100,
233 ktcr_adv_1000F = 0x0200,
234 };
235
236 /* Globals */
237 static u32 SavedClkRun;
238 static unsigned int cur_rx;
239 static unsigned int rx_config;
240 static unsigned int tx_config;
241
242 /* Note: transmit and receive buffers and descriptors must be
243 long long word aligned */
244 static BufferDesc txd __attribute__ ((aligned(8)));
245 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(8)));
246 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(8)));
247 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE]
248 __attribute__ ((aligned(8)));
249
250 /* Function Prototypes */
251 static int mdio_read(struct eth_device *dev, int phy_id, int addr);
252 static void mdio_write(struct eth_device *dev, int phy_id, int addr, int value);
253 static void mdio_sync(struct eth_device *dev, u32 offset);
254 static int ns8382x_init(struct eth_device *dev, bd_t * bis);
255 static void ns8382x_reset(struct eth_device *dev);
256 static void ns8382x_init_rxfilter(struct eth_device *dev);
257 static void ns8382x_init_txd(struct eth_device *dev);
258 static void ns8382x_init_rxd(struct eth_device *dev);
259 static void ns8382x_set_rx_mode(struct eth_device *dev);
260 static void ns8382x_check_duplex(struct eth_device *dev);
261 static int ns8382x_send(struct eth_device *dev, volatile void *packet,
262 int length);
263 static int ns8382x_poll(struct eth_device *dev);
264 static void ns8382x_disable(struct eth_device *dev);
265
266 static struct pci_device_id supported[] = {
267 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83820},
268 {}
269 };
270
271 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
272 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
273
274 static inline int
INW(struct eth_device * dev,u_long addr)275 INW(struct eth_device *dev, u_long addr)
276 {
277 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
278 }
279
280 static int
INL(struct eth_device * dev,u_long addr)281 INL(struct eth_device *dev, u_long addr)
282 {
283 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
284 }
285
286 static inline void
OUTW(struct eth_device * dev,int command,u_long addr)287 OUTW(struct eth_device *dev, int command, u_long addr)
288 {
289 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
290 }
291
292 static inline void
OUTL(struct eth_device * dev,int command,u_long addr)293 OUTL(struct eth_device *dev, int command, u_long addr)
294 {
295 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
296 }
297
298 /* Function: ns8382x_initialize
299 * Description: Retrieves the MAC address of the card, and sets up some
300 * globals required by other routines, and initializes the NIC, making it
301 * ready to send and receive packets.
302 * Side effects: initializes ns8382xs, ready to recieve packets.
303 * Returns: int: number of cards found
304 */
305
306 int
ns8382x_initialize(bd_t * bis)307 ns8382x_initialize(bd_t * bis)
308 {
309 pci_dev_t devno;
310 int card_number = 0;
311 struct eth_device *dev;
312 u32 iobase, status;
313 int i, idx = 0;
314 u32 phyAddress;
315 u32 tmp;
316 u32 chip_config;
317
318 while (1) { /* Find PCI device(s) */
319 if ((devno = pci_find_devices(supported, idx++)) < 0)
320 break;
321
322 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
323 iobase &= ~0x3; /* 1: unused and 0:I/O Space Indicator */
324
325 #ifdef NS8382X_DEBUG
326 printf("ns8382x: NatSemi dp8382x @ 0x%x\n", iobase);
327 #endif
328
329 pci_write_config_dword(devno, PCI_COMMAND,
330 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
331
332 /* Check if I/O accesses and Bus Mastering are enabled. */
333 pci_read_config_dword(devno, PCI_COMMAND, &status);
334 if (!(status & PCI_COMMAND_MEMORY)) {
335 printf("Error: Can not enable MEM access.\n");
336 continue;
337 } else if (!(status & PCI_COMMAND_MASTER)) {
338 printf("Error: Can not enable Bus Mastering.\n");
339 continue;
340 }
341
342 dev = (struct eth_device *) malloc(sizeof *dev);
343
344 sprintf(dev->name, "dp8382x#%d", card_number);
345 dev->iobase = bus_to_phys(iobase);
346 dev->priv = (void *) devno;
347 dev->init = ns8382x_init;
348 dev->halt = ns8382x_disable;
349 dev->send = ns8382x_send;
350 dev->recv = ns8382x_poll;
351
352 /* ns8382x has a non-standard PM control register
353 * in PCI config space. Some boards apparently need
354 * to be brought to D0 in this manner. */
355 pci_read_config_dword(devno, PCIPM, &tmp);
356 if (tmp & (0x03 | 0x100)) { /* D0 state, disable PME assertion */
357 u32 newtmp = tmp & ~(0x03 | 0x100);
358 pci_write_config_dword(devno, PCIPM, newtmp);
359 }
360
361 /* get MAC address */
362 for (i = 0; i < 3; i++) {
363 u32 data;
364 char *mac = (char *)&dev->enetaddr[i * 2];
365
366 OUTL(dev, i * 2, RxFilterAddr);
367 data = INL(dev, RxFilterData);
368 *mac++ = data;
369 *mac++ = data >> 8;
370 }
371 /* get PHY address, can't be zero */
372 for (phyAddress = 1; phyAddress < 32; phyAddress++) {
373 u32 rev, phy1;
374
375 phy1 = mdio_read(dev, phyAddress, PHYIDR1);
376 if (phy1 == 0x2000) { /*check for 83861/91 */
377 rev = mdio_read(dev, phyAddress, PHYIDR2);
378 if ((rev & ~(0x000f)) == 0x00005c50 ||
379 (rev & ~(0x000f)) == 0x00005c60) {
380 #ifdef NS8382X_DEBUG
381 printf("phy rev is %x\n", rev);
382 printf("phy address is %x\n",
383 phyAddress);
384 #endif
385 break;
386 }
387 }
388 }
389
390 /* set phy to autonegotiate && advertise everything */
391 mdio_write(dev, phyAddress, KTCR,
392 (ktcr_adv_1000H | ktcr_adv_1000F));
393 mdio_write(dev, phyAddress, ANAR,
394 (anar_adv_100F | anar_adv_100H | anar_adv_10H |
395 anar_adv_10F | anar_ieee_8023));
396 mdio_write(dev, phyAddress, BMCR, 0x0); /*restore */
397 mdio_write(dev, phyAddress, BMCR,
398 (Bmcr_AutoNegEn | Bmcr_RstAutoNeg));
399 /* Reset the chip to erase any previous misconfiguration. */
400 OUTL(dev, (ChipReset), ChipCmd);
401
402 chip_config = INL(dev, ChipConfig);
403 /* reset the phy */
404 OUTL(dev, (chip_config | PhyRst), ChipConfig);
405 /* power up and initialize transceiver */
406 OUTL(dev, (chip_config & ~(PhyDis)), ChipConfig);
407
408 mdio_sync(dev, EECtrl);
409 #ifdef NS8382X_DEBUG
410 {
411 u32 chpcfg =
412 INL(dev, ChipConfig) ^ SpeedStatus_Polarity;
413
414 printf("%s: Transceiver 10%s %s duplex.\n", dev->name,
415 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed)
416 ? "0" : "",
417 chpcfg & FullDuplex ? "full" : "half");
418 printf("%s: %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
419 dev->enetaddr[0], dev->enetaddr[1],
420 dev->enetaddr[2], dev->enetaddr[3],
421 dev->enetaddr[4], dev->enetaddr[5]);
422 }
423 #endif
424 /* Disable PME:
425 * The PME bit is initialized from the EEPROM contents.
426 * PCI cards probably have PME disabled, but motherboard
427 * implementations may have PME set to enable WakeOnLan.
428 * With PME set the chip will scan incoming packets but
429 * nothing will be written to memory. */
430 SavedClkRun = INL(dev, ClkRun);
431 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
432
433 eth_register(dev);
434
435 card_number++;
436
437 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x60);
438
439 udelay(10 * 1000);
440 }
441 return card_number;
442 }
443
444 /* MII transceiver control section.
445 Read and write MII registers using software-generated serial MDIO
446 protocol. See the MII specifications or DP83840A data sheet for details.
447
448 The maximum data clock rate is 2.5 MHz. To meet minimum timing we
449 must flush writes to the PCI bus with a PCI read. */
450 #define mdio_delay(mdio_addr) INL(dev, mdio_addr)
451
452 #define MDIO_EnbIn (0)
453 #define MDIO_WRITE0 (MDIO_EnbOutput)
454 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
455
456 /* Generate the preamble required for initial synchronization and
457 a few older transceivers. */
458 static void
mdio_sync(struct eth_device * dev,u32 offset)459 mdio_sync(struct eth_device *dev, u32 offset)
460 {
461 int bits = 32;
462
463 /* Establish sync by sending at least 32 logic ones. */
464 while (--bits >= 0) {
465 OUTL(dev, MDIO_WRITE1, offset);
466 mdio_delay(offset);
467 OUTL(dev, MDIO_WRITE1 | MDIO_ShiftClk, offset);
468 mdio_delay(offset);
469 }
470 }
471
472 static int
mdio_read(struct eth_device * dev,int phy_id,int addr)473 mdio_read(struct eth_device *dev, int phy_id, int addr)
474 {
475 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | addr;
476 int i, retval = 0;
477
478 /* Shift the read command bits out. */
479 for (i = 15; i >= 0; i--) {
480 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
481
482 OUTL(dev, dataval, EECtrl);
483 mdio_delay(EECtrl);
484 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
485 mdio_delay(EECtrl);
486 }
487 /* Read the two transition, 16 data, and wire-idle bits. */
488 for (i = 19; i > 0; i--) {
489 OUTL(dev, MDIO_EnbIn, EECtrl);
490 mdio_delay(EECtrl);
491 retval =
492 (retval << 1) | ((INL(dev, EECtrl) & MDIO_Data) ? 1 : 0);
493 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
494 mdio_delay(EECtrl);
495 }
496 return (retval >> 1) & 0xffff;
497 }
498
499 static void
mdio_write(struct eth_device * dev,int phy_id,int addr,int value)500 mdio_write(struct eth_device *dev, int phy_id, int addr, int value)
501 {
502 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (addr << 18) | value;
503 int i;
504
505 /* Shift the command bits out. */
506 for (i = 31; i >= 0; i--) {
507 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
508
509 OUTL(dev, dataval, EECtrl);
510 mdio_delay(EECtrl);
511 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
512 mdio_delay(EECtrl);
513 }
514 /* Clear out extra bits. */
515 for (i = 2; i > 0; i--) {
516 OUTL(dev, MDIO_EnbIn, EECtrl);
517 mdio_delay(EECtrl);
518 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
519 mdio_delay(EECtrl);
520 }
521 return;
522 }
523
524 /* Function: ns8382x_init
525 * Description: resets the ethernet controller chip and configures
526 * registers and data structures required for sending and receiving packets.
527 * Arguments: struct eth_device *dev: NIC data structure
528 * returns: int.
529 */
530
531 static int
ns8382x_init(struct eth_device * dev,bd_t * bis)532 ns8382x_init(struct eth_device *dev, bd_t * bis)
533 {
534 u32 config;
535
536 ns8382x_reset(dev);
537
538 /* Disable PME:
539 * The PME bit is initialized from the EEPROM contents.
540 * PCI cards probably have PME disabled, but motherboard
541 * implementations may have PME set to enable WakeOnLan.
542 * With PME set the chip will scan incoming packets but
543 * nothing will be written to memory. */
544 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
545
546 ns8382x_init_rxfilter(dev);
547 ns8382x_init_txd(dev);
548 ns8382x_init_rxd(dev);
549
550 /*set up ChipConfig */
551 config = INL(dev, ChipConfig);
552 /*turn off 64 bit ops && Ten-bit interface
553 * && big-endian mode && extended status */
554 config &= ~(TBIEn | Mode1000 | T64En | D64En | M64En | BEMode | PhyDis | ExtStEn);
555 OUTL(dev, config, ChipConfig);
556
557 /* Configure the PCI bus bursts and FIFO thresholds. */
558 tx_config = TxCarrierIgn | TxHeartIgn | TxAutoPad
559 | TxCollRetry | TxMxdma_1024 | (0x1002);
560 rx_config = RxMxdma_1024 | 0x20;
561 #ifdef NS8382X_DEBUG
562 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
563 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
564 #endif
565 OUTL(dev, tx_config, TxConfig);
566 OUTL(dev, rx_config, RxConfig);
567
568 /*turn off priority queueing */
569 OUTL(dev, 0x0, PriQueue);
570
571 ns8382x_check_duplex(dev);
572 ns8382x_set_rx_mode(dev);
573
574 OUTL(dev, (RxOn | TxOn), ChipCmd);
575 return 1;
576 }
577
578 /* Function: ns8382x_reset
579 * Description: soft resets the controller chip
580 * Arguments: struct eth_device *dev: NIC data structure
581 * Returns: void.
582 */
583 static void
ns8382x_reset(struct eth_device * dev)584 ns8382x_reset(struct eth_device *dev)
585 {
586 OUTL(dev, ChipReset, ChipCmd);
587 while (INL(dev, ChipCmd))
588 /*wait until done */ ;
589 OUTL(dev, 0, IntrMask);
590 OUTL(dev, 0, IntrEnable);
591 }
592
593 /* Function: ns8382x_init_rxfilter
594 * Description: sets receive filter address to our MAC address
595 * Arguments: struct eth_device *dev: NIC data structure
596 * returns: void.
597 */
598
599 static void
ns8382x_init_rxfilter(struct eth_device * dev)600 ns8382x_init_rxfilter(struct eth_device *dev)
601 {
602 int i;
603
604 for (i = 0; i < ETH_ALEN; i += 2) {
605 OUTL(dev, i, RxFilterAddr);
606 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
607 RxFilterData);
608 }
609 }
610
611 /* Function: ns8382x_init_txd
612 * Description: initializes the Tx descriptor
613 * Arguments: struct eth_device *dev: NIC data structure
614 * returns: void.
615 */
616
617 static void
ns8382x_init_txd(struct eth_device * dev)618 ns8382x_init_txd(struct eth_device *dev)
619 {
620 txd.link = (u32) 0;
621 txd.bufptr = cpu_to_le32((u32) & txb[0]);
622 txd.cmdsts = (u32) 0;
623 txd.extsts = (u32) 0;
624
625 OUTL(dev, 0x0, TxRingPtrHi);
626 OUTL(dev, phys_to_bus((u32)&txd), TxRingPtr);
627 #ifdef NS8382X_DEBUG
628 printf("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n",
629 INL(dev, TxRingPtr), &txd);
630 #endif
631 }
632
633 /* Function: ns8382x_init_rxd
634 * Description: initializes the Rx descriptor ring
635 * Arguments: struct eth_device *dev: NIC data structure
636 * Returns: void.
637 */
638
639 static void
ns8382x_init_rxd(struct eth_device * dev)640 ns8382x_init_rxd(struct eth_device *dev)
641 {
642 int i;
643
644 OUTL(dev, 0x0, RxRingPtrHi);
645
646 cur_rx = 0;
647 for (i = 0; i < NUM_RX_DESC; i++) {
648 rxd[i].link =
649 cpu_to_le32((i + 1 <
650 NUM_RX_DESC) ? (u32) & rxd[i +
651 1] : (u32) &
652 rxd[0]);
653 rxd[i].extsts = cpu_to_le32((u32) 0x0);
654 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
655 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
656 #ifdef NS8382X_DEBUG
657 printf
658 ("ns8382x_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%X\n",
659 i, &rxd[i], le32_to_cpu(rxd[i].link),
660 le32_to_cpu(rxd[i].cmdsts), le32_to_cpu(rxd[i].bufptr));
661 #endif
662 }
663 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr);
664
665 #ifdef NS8382X_DEBUG
666 printf("ns8382x_init_rxd: RX descriptor register loaded with: %X\n",
667 INL(dev, RxRingPtr));
668 #endif
669 }
670
671 /* Function: ns8382x_set_rx_mode
672 * Description:
673 * sets the receive mode to accept all broadcast packets and packets
674 * with our MAC address, and reject all multicast packets.
675 * Arguments: struct eth_device *dev: NIC data structure
676 * Returns: void.
677 */
678
679 static void
ns8382x_set_rx_mode(struct eth_device * dev)680 ns8382x_set_rx_mode(struct eth_device *dev)
681 {
682 u32 rx_mode = 0x0;
683 /*spec says RxFilterEnable has to be 0 for rest of
684 * this stuff to be properly configured. Linux driver
685 * seems to support this*/
686 /* OUTL(dev, rx_mode, RxFilterAddr);*/
687 rx_mode = (RxFilterEnable | AcceptAllBroadcast | AcceptPerfectMatch);
688 OUTL(dev, rx_mode, RxFilterAddr);
689 printf("ns8382x_set_rx_mode: set to %X\n", rx_mode);
690 /*now we turn RxFilterEnable back on */
691 /*rx_mode |= RxFilterEnable;
692 OUTL(dev, rx_mode, RxFilterAddr);*/
693 }
694
695 static void
ns8382x_check_duplex(struct eth_device * dev)696 ns8382x_check_duplex(struct eth_device *dev)
697 {
698 int gig = 0;
699 int hun = 0;
700 int duplex = 0;
701 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity);
702
703 duplex = (config & FullDuplex) ? 1 : 0;
704 gig = (config & GigSpeed) ? 1 : 0;
705 hun = (config & HundSpeed) ? 1 : 0;
706 #ifdef NS8382X_DEBUG
707 printf("%s: Setting 10%s %s-duplex based on negotiated link"
708 " capability.\n", dev->name, (gig) ? "00" : (hun) ? "0" : "",
709 duplex ? "full" : "half");
710 #endif
711 if (duplex) {
712 rx_config |= RxAcceptTx;
713 tx_config |= (TxCarrierIgn | TxHeartIgn);
714 } else {
715 rx_config &= ~RxAcceptTx;
716 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
717 }
718 #ifdef NS8382X_DEBUG
719 printf("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config);
720 printf("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config);
721 #endif
722 OUTL(dev, tx_config, TxConfig);
723 OUTL(dev, rx_config, RxConfig);
724
725 /*if speed is 10 or 100, remove MODE1000,
726 * if it's 1000, then set it */
727 config = INL(dev, ChipConfig);
728 if (gig)
729 config |= Mode1000;
730 else
731 config &= ~Mode1000;
732
733 #ifdef NS8382X_DEBUG
734 printf("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns");
735 #endif
736 OUTL(dev, config, ChipConfig);
737 }
738
739 /* Function: ns8382x_send
740 * Description: transmits a packet and waits for completion or timeout.
741 * Returns: void. */
742 static int
ns8382x_send(struct eth_device * dev,volatile void * packet,int length)743 ns8382x_send(struct eth_device *dev, volatile void *packet, int length)
744 {
745 u32 i, status = 0;
746 vu_long tx_stat = 0;
747
748 /* Stop the transmitter */
749 OUTL(dev, TxOff, ChipCmd);
750 #ifdef NS8382X_DEBUG
751 printf("ns8382x_send: sending %d bytes\n", (int)length);
752 #endif
753
754 /* set the transmit buffer descriptor and enable Transmit State Machine */
755 txd.link = cpu_to_le32(0x0);
756 txd.bufptr = cpu_to_le32(phys_to_bus((u32)packet));
757 txd.extsts = cpu_to_le32(0x0);
758 txd.cmdsts = cpu_to_le32(DescOwn | length);
759
760 /* load Transmit Descriptor Register */
761 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
762 #ifdef NS8382X_DEBUG
763 printf("ns8382x_send: TX descriptor register loaded with: %#08X\n",
764 INL(dev, TxRingPtr));
765 printf("\ttxd.link:%X\tbufp:%X\texsts:%X\tcmdsts:%X\n",
766 le32_to_cpu(txd.link), le32_to_cpu(txd.bufptr),
767 le32_to_cpu(txd.extsts), le32_to_cpu(txd.cmdsts));
768 #endif
769 /* restart the transmitter */
770 OUTL(dev, TxOn, ChipCmd);
771
772 for (i = 0; (tx_stat = le32_to_cpu(txd.cmdsts)) & DescOwn; i++) {
773 if (i >= TOUT_LOOP) {
774 printf ("%s: tx error buffer not ready: txd.cmdsts %#lX\n",
775 dev->name, tx_stat);
776 goto Done;
777 }
778 }
779
780 if (!(tx_stat & DescPktOK)) {
781 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat);
782 goto Done;
783 }
784 #ifdef NS8382X_DEBUG
785 printf("ns8382x_send: tx_stat: %#08X\n", tx_stat);
786 #endif
787
788 status = 1;
789 Done:
790 return status;
791 }
792
793 /* Function: ns8382x_poll
794 * Description: checks for a received packet and returns it if found.
795 * Arguments: struct eth_device *dev: NIC data structure
796 * Returns: 1 if packet was received.
797 * 0 if no packet was received.
798 * Side effects:
799 * Returns (copies) the packet to the array dev->packet.
800 * Returns the length of the packet.
801 */
802
803 static int
ns8382x_poll(struct eth_device * dev)804 ns8382x_poll(struct eth_device *dev)
805 {
806 int retstat = 0;
807 int length = 0;
808 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
809
810 if (!(rx_status & (u32) DescOwn))
811 return retstat;
812 #ifdef NS8382X_DEBUG
813 printf("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n",
814 cur_rx, rx_status);
815 #endif
816 length = (rx_status & DSIZE) - CRC_SIZE;
817
818 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
819 /* corrupted packet received */
820 printf("ns8382x_poll: Corrupted packet, status:%lx\n", rx_status);
821 retstat = 0;
822 } else {
823 /* give packet to higher level routine */
824 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
825 retstat = 1;
826 }
827
828 /* return the descriptor and buffer to receive ring */
829 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
830 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
831
832 if (++cur_rx == NUM_RX_DESC)
833 cur_rx = 0;
834
835 /* re-enable the potentially idle receive state machine */
836 OUTL(dev, RxOn, ChipCmd);
837
838 return retstat;
839 }
840
841 /* Function: ns8382x_disable
842 * Description: Turns off interrupts and stops Tx and Rx engines
843 * Arguments: struct eth_device *dev: NIC data structure
844 * Returns: void.
845 */
846
847 static void
ns8382x_disable(struct eth_device * dev)848 ns8382x_disable(struct eth_device *dev)
849 {
850 /* Disable interrupts using the mask. */
851 OUTL(dev, 0, IntrMask);
852 OUTL(dev, 0, IntrEnable);
853
854 /* Stop the chip's Tx and Rx processes. */
855 OUTL(dev, (RxOff | TxOff), ChipCmd);
856
857 /* Restore PME enable bit */
858 OUTL(dev, SavedClkRun, ClkRun);
859 }
860