2 ns8382x.c: A U-Boot driver for the NatSemi DP8382[01].
3 ported by: Mark A. Rakes (mark_rakes@vivato.net)
6 1. an Etherboot driver for DP8381[56] written by:
7 Copyright (C) 2001 Entity Cyber, Inc.
9 This development of this Etherboot driver was funded by
10 Sicom Systems: http://www.sicompos.com/
12 Author: Marty Connor (mdc@thinguin.org)
13 Adapted from a Linux driver which was written by Donald Becker
15 This software may be used and distributed according to the terms
16 of the GNU Public License (GPL), incorporated herein by reference.
18 2. A Linux driver by Donald Becker, ns820.c:
19 Written/copyright 1999-2002 by Donald Becker.
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.
29 The original author may be reached as becker@scyld.com, or at
30 Scyld Computing Corporation
31 410 Severn Ave., Suite 210
34 Support information and updates available at
35 http://www.scyld.com/network/netsemi.html
37 Datasheets available from:
38 http://www.national.com/pf/DP/DP83820.html
39 http://www.national.com/pf/DP/DP83821.html
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
61 #define DSIZE 0x00000FFF
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. */
69 enum register_offsets {
100 GigSpeed = 0x40000000,
101 HundSpeed = 0x20000000,
102 FullDuplex = 0x10000000,
104 Mode1000 = 0x00400000,
110 ExtStEn = 0x00000100,
113 #define SpeedStatus_Polarity ( GigSpeed | HundSpeed | FullDuplex)
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
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,
153 /* Bits in the RxMode register. */
155 RxFilterEnable = 0x80000000,
156 AcceptAllBroadcast = 0x40000000,
157 AcceptAllMulticast = 0x20000000,
158 AcceptAllUnicast = 0x10000000,
159 AcceptPerfectMatch = 0x08000000,
162 typedef struct _BufferDesc {
166 u32 extsts; /*not used here */
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,
175 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
176 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
177 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
178 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
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,
189 MDIO_ShiftClk = 0x0040,
190 MDIO_EnbOutput = 0x0020,
194 /* PHY Register offsets. */
195 enum phy_reg_offsets {
204 /* basic mode control register bits */
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,
221 /* auto negotiation advertisement register */
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,
230 /* 1K-base T control register */
232 ktcr_adv_1000H = 0x0100,
233 ktcr_adv_1000F = 0x0200,
237 static u32 SavedClkRun;
238 static unsigned int cur_rx;
239 static unsigned int rx_config;
240 static unsigned int tx_config;
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)));
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,
263 static int ns8382x_poll(struct eth_device *dev);
264 static void ns8382x_disable(struct eth_device *dev);
266 static struct pci_device_id supported[] = {
267 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83820},
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)
275 INW(struct eth_device *dev, u_long addr)
277 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
281 INL(struct eth_device *dev, u_long addr)
283 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
287 OUTW(struct eth_device *dev, int command, u_long addr)
289 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
293 OUTL(struct eth_device *dev, int command, u_long addr)
295 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
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
307 ns8382x_initialize(bd_t * bis)
311 struct eth_device *dev;
318 while (1) { /* Find PCI device(s) */
319 if ((devno = pci_find_devices(supported, idx++)) < 0)
322 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
323 iobase &= ~0x3; /* 1: unused and 0:I/O Space Indicator */
326 printf("ns8382x: NatSemi dp8382x @ 0x%x\n", iobase);
329 pci_write_config_dword(devno, PCI_COMMAND,
330 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
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");
337 } else if (!(status & PCI_COMMAND_MASTER)) {
338 printf("Error: Can not enable Bus Mastering.\n");
342 dev = (struct eth_device *) malloc(sizeof *dev);
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;
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);
361 /* get MAC address */
362 for (i = 0; i < 3; i++) {
364 char *mac = (char *)&dev->enetaddr[i * 2];
366 OUTL(dev, i * 2, RxFilterAddr);
367 data = INL(dev, RxFilterData);
371 /* get PHY address, can't be zero */
372 for (phyAddress = 1; phyAddress < 32; phyAddress++) {
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) {
381 printf("phy rev is %x\n", rev);
382 printf("phy address is %x\n",
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);
402 chip_config = INL(dev, ChipConfig);
404 OUTL(dev, (chip_config | PhyRst), ChipConfig);
405 /* power up and initialize transceiver */
406 OUTL(dev, (chip_config & ~(PhyDis)), ChipConfig);
408 mdio_sync(dev, EECtrl);
412 INL(dev, ChipConfig) ^ SpeedStatus_Polarity;
414 printf("%s: Transceiver 10%s %s duplex.\n", dev->name,
415 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed)
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]);
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);
437 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x60);
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.
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)
452 #define MDIO_EnbIn (0)
453 #define MDIO_WRITE0 (MDIO_EnbOutput)
454 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
456 /* Generate the preamble required for initial synchronization and
457 a few older transceivers. */
459 mdio_sync(struct eth_device *dev, u32 offset)
463 /* Establish sync by sending at least 32 logic ones. */
464 while (--bits >= 0) {
465 OUTL(dev, MDIO_WRITE1, offset);
467 OUTL(dev, MDIO_WRITE1 | MDIO_ShiftClk, offset);
473 mdio_read(struct eth_device *dev, int phy_id, int addr)
475 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | addr;
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;
482 OUTL(dev, dataval, EECtrl);
484 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
487 /* Read the two transition, 16 data, and wire-idle bits. */
488 for (i = 19; i > 0; i--) {
489 OUTL(dev, MDIO_EnbIn, EECtrl);
492 (retval << 1) | ((INL(dev, EECtrl) & MDIO_Data) ? 1 : 0);
493 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
496 return (retval >> 1) & 0xffff;
500 mdio_write(struct eth_device *dev, int phy_id, int addr, int value)
502 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (addr << 18) | value;
505 /* Shift the command bits out. */
506 for (i = 31; i >= 0; i--) {
507 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
509 OUTL(dev, dataval, EECtrl);
511 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
514 /* Clear out extra bits. */
515 for (i = 2; i > 0; i--) {
516 OUTL(dev, MDIO_EnbIn, EECtrl);
518 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
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
532 ns8382x_init(struct eth_device *dev, bd_t * bis)
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);
546 ns8382x_init_rxfilter(dev);
547 ns8382x_init_txd(dev);
548 ns8382x_init_rxd(dev);
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);
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;
562 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
563 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
565 OUTL(dev, tx_config, TxConfig);
566 OUTL(dev, rx_config, RxConfig);
568 /*turn off priority queueing */
569 OUTL(dev, 0x0, PriQueue);
571 ns8382x_check_duplex(dev);
572 ns8382x_set_rx_mode(dev);
574 OUTL(dev, (RxOn | TxOn), ChipCmd);
578 /* Function: ns8382x_reset
579 * Description: soft resets the controller chip
580 * Arguments: struct eth_device *dev: NIC data structure
584 ns8382x_reset(struct eth_device *dev)
586 OUTL(dev, ChipReset, ChipCmd);
587 while (INL(dev, ChipCmd))
588 /*wait until done */ ;
589 OUTL(dev, 0, IntrMask);
590 OUTL(dev, 0, IntrEnable);
593 /* Function: ns8382x_init_rxfilter
594 * Description: sets receive filter address to our MAC address
595 * Arguments: struct eth_device *dev: NIC data structure
600 ns8382x_init_rxfilter(struct eth_device *dev)
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),
611 /* Function: ns8382x_init_txd
612 * Description: initializes the Tx descriptor
613 * Arguments: struct eth_device *dev: NIC data structure
618 ns8382x_init_txd(struct eth_device *dev)
621 txd.bufptr = cpu_to_le32((u32) & txb[0]);
622 txd.cmdsts = (u32) 0;
623 txd.extsts = (u32) 0;
625 OUTL(dev, 0x0, TxRingPtrHi);
626 OUTL(dev, phys_to_bus((u32)&txd), TxRingPtr);
628 printf("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n",
629 INL(dev, TxRingPtr), &txd);
633 /* Function: ns8382x_init_rxd
634 * Description: initializes the Rx descriptor ring
635 * Arguments: struct eth_device *dev: NIC data structure
640 ns8382x_init_rxd(struct eth_device *dev)
644 OUTL(dev, 0x0, RxRingPtrHi);
647 for (i = 0; i < NUM_RX_DESC; i++) {
650 NUM_RX_DESC) ? (u32) & rxd[i +
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]);
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));
663 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr);
666 printf("ns8382x_init_rxd: RX descriptor register loaded with: %X\n",
667 INL(dev, RxRingPtr));
671 /* Function: ns8382x_set_rx_mode
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
680 ns8382x_set_rx_mode(struct eth_device *dev)
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);*/
696 ns8382x_check_duplex(struct eth_device *dev)
701 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity);
703 duplex = (config & FullDuplex) ? 1 : 0;
704 gig = (config & GigSpeed) ? 1 : 0;
705 hun = (config & HundSpeed) ? 1 : 0;
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");
712 rx_config |= RxAcceptTx;
713 tx_config |= (TxCarrierIgn | TxHeartIgn);
715 rx_config &= ~RxAcceptTx;
716 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
719 printf("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config);
720 printf("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config);
722 OUTL(dev, tx_config, TxConfig);
723 OUTL(dev, rx_config, RxConfig);
725 /*if speed is 10 or 100, remove MODE1000,
726 * if it's 1000, then set it */
727 config = INL(dev, ChipConfig);
734 printf("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns");
736 OUTL(dev, config, ChipConfig);
739 /* Function: ns8382x_send
740 * Description: transmits a packet and waits for completion or timeout.
743 ns8382x_send(struct eth_device *dev, volatile void *packet, int length)
748 /* Stop the transmitter */
749 OUTL(dev, TxOff, ChipCmd);
751 printf("ns8382x_send: sending %d bytes\n", (int)length);
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);
760 /* load Transmit Descriptor Register */
761 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
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));
769 /* restart the transmitter */
770 OUTL(dev, TxOn, ChipCmd);
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",
780 if (!(tx_stat & DescPktOK)) {
781 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat);
785 printf("ns8382x_send: tx_stat: %#08X\n", tx_stat);
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.
799 * Returns (copies) the packet to the array dev->packet.
800 * Returns the length of the packet.
804 ns8382x_poll(struct eth_device *dev)
808 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
810 if (!(rx_status & (u32) DescOwn))
813 printf("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n",
816 length = (rx_status & DSIZE) - CRC_SIZE;
818 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
819 /* corrupted packet received */
820 printf("ns8382x_poll: Corrupted packet, status:%lx\n", rx_status);
823 /* give packet to higher level routine */
824 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
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]);
832 if (++cur_rx == NUM_RX_DESC)
835 /* re-enable the potentially idle receive state machine */
836 OUTL(dev, RxOn, ChipCmd);
841 /* Function: ns8382x_disable
842 * Description: Turns off interrupts and stops Tx and Rx engines
843 * Arguments: struct eth_device *dev: NIC data structure
848 ns8382x_disable(struct eth_device *dev)
850 /* Disable interrupts using the mask. */
851 OUTL(dev, 0, IntrMask);
852 OUTL(dev, 0, IntrEnable);
854 /* Stop the chip's Tx and Rx processes. */
855 OUTL(dev, (RxOff | TxOff), ChipCmd);
857 /* Restore PME enable bit */
858 OUTL(dev, SavedClkRun, ClkRun);