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, void *packet, int length);
262 static int ns8382x_poll(struct eth_device *dev);
263 static void ns8382x_disable(struct eth_device *dev);
265 static struct pci_device_id supported[] = {
266 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83820},
270 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
271 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
274 INW(struct eth_device *dev, u_long addr)
276 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
280 INL(struct eth_device *dev, u_long addr)
282 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
286 OUTW(struct eth_device *dev, int command, u_long addr)
288 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
292 OUTL(struct eth_device *dev, int command, u_long addr)
294 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
297 /* Function: ns8382x_initialize
298 * Description: Retrieves the MAC address of the card, and sets up some
299 * globals required by other routines, and initializes the NIC, making it
300 * ready to send and receive packets.
301 * Side effects: initializes ns8382xs, ready to receive packets.
302 * Returns: int: number of cards found
306 ns8382x_initialize(bd_t * bis)
310 struct eth_device *dev;
317 while (1) { /* Find PCI device(s) */
318 if ((devno = pci_find_devices(supported, idx++)) < 0)
321 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
322 iobase &= ~0x3; /* 1: unused and 0:I/O Space Indicator */
324 debug("ns8382x: NatSemi dp8382x @ 0x%x\n", iobase);
326 pci_write_config_dword(devno, PCI_COMMAND,
327 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
329 /* Check if I/O accesses and Bus Mastering are enabled. */
330 pci_read_config_dword(devno, PCI_COMMAND, &status);
331 if (!(status & PCI_COMMAND_MEMORY)) {
332 printf("Error: Can not enable MEM access.\n");
334 } else if (!(status & PCI_COMMAND_MASTER)) {
335 printf("Error: Can not enable Bus Mastering.\n");
339 dev = (struct eth_device *) malloc(sizeof *dev);
341 printf("ns8382x: Can not allocate memory\n");
344 memset(dev, 0, sizeof(*dev));
346 sprintf(dev->name, "dp8382x#%d", card_number);
347 dev->iobase = bus_to_phys(iobase);
348 dev->priv = (void *) devno;
349 dev->init = ns8382x_init;
350 dev->halt = ns8382x_disable;
351 dev->send = ns8382x_send;
352 dev->recv = ns8382x_poll;
354 /* ns8382x has a non-standard PM control register
355 * in PCI config space. Some boards apparently need
356 * to be brought to D0 in this manner. */
357 pci_read_config_dword(devno, PCIPM, &tmp);
358 if (tmp & (0x03 | 0x100)) { /* D0 state, disable PME assertion */
359 u32 newtmp = tmp & ~(0x03 | 0x100);
360 pci_write_config_dword(devno, PCIPM, newtmp);
363 /* get MAC address */
364 for (i = 0; i < 3; i++) {
366 char *mac = (char *)&dev->enetaddr[i * 2];
368 OUTL(dev, i * 2, RxFilterAddr);
369 data = INL(dev, RxFilterData);
373 /* get PHY address, can't be zero */
374 for (phyAddress = 1; phyAddress < 32; phyAddress++) {
377 phy1 = mdio_read(dev, phyAddress, PHYIDR1);
378 if (phy1 == 0x2000) { /*check for 83861/91 */
379 rev = mdio_read(dev, phyAddress, PHYIDR2);
380 if ((rev & ~(0x000f)) == 0x00005c50 ||
381 (rev & ~(0x000f)) == 0x00005c60) {
382 debug("phy rev is %x\n", rev);
383 debug("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 debug("%s: Transceiver 10%s %s duplex.\n", dev->name,
415 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed)
417 chpcfg & FullDuplex ? "full" : "half");
418 debug("%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 debug("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
563 debug("%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 debug("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n",
629 INL(dev, TxRingPtr), &txd);
632 /* Function: ns8382x_init_rxd
633 * Description: initializes the Rx descriptor ring
634 * Arguments: struct eth_device *dev: NIC data structure
639 ns8382x_init_rxd(struct eth_device *dev)
643 OUTL(dev, 0x0, RxRingPtrHi);
646 for (i = 0; i < NUM_RX_DESC; i++) {
649 NUM_RX_DESC) ? (u32) & rxd[i +
652 rxd[i].extsts = cpu_to_le32((u32) 0x0);
653 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
654 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
657 ("ns8382x_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%X\n",
658 i, &rxd[i], le32_to_cpu(rxd[i].link),
659 le32_to_cpu(rxd[i].cmdsts), le32_to_cpu(rxd[i].bufptr));
661 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr);
663 debug("ns8382x_init_rxd: RX descriptor register loaded with: %X\n",
664 INL(dev, RxRingPtr));
667 /* Function: ns8382x_set_rx_mode
669 * sets the receive mode to accept all broadcast packets and packets
670 * with our MAC address, and reject all multicast packets.
671 * Arguments: struct eth_device *dev: NIC data structure
676 ns8382x_set_rx_mode(struct eth_device *dev)
679 /*spec says RxFilterEnable has to be 0 for rest of
680 * this stuff to be properly configured. Linux driver
681 * seems to support this*/
682 /* OUTL(dev, rx_mode, RxFilterAddr);*/
683 rx_mode = (RxFilterEnable | AcceptAllBroadcast | AcceptPerfectMatch);
684 OUTL(dev, rx_mode, RxFilterAddr);
685 printf("ns8382x_set_rx_mode: set to %X\n", rx_mode);
686 /*now we turn RxFilterEnable back on */
687 /*rx_mode |= RxFilterEnable;
688 OUTL(dev, rx_mode, RxFilterAddr);*/
692 ns8382x_check_duplex(struct eth_device *dev)
697 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity);
699 duplex = (config & FullDuplex) ? 1 : 0;
700 gig = (config & GigSpeed) ? 1 : 0;
701 hun = (config & HundSpeed) ? 1 : 0;
703 debug("%s: Setting 10%s %s-duplex based on negotiated link"
704 " capability.\n", dev->name, (gig) ? "00" : (hun) ? "0" : "",
705 duplex ? "full" : "half");
708 rx_config |= RxAcceptTx;
709 tx_config |= (TxCarrierIgn | TxHeartIgn);
711 rx_config &= ~RxAcceptTx;
712 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
715 debug("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config);
716 debug("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config);
718 OUTL(dev, tx_config, TxConfig);
719 OUTL(dev, rx_config, RxConfig);
721 /*if speed is 10 or 100, remove MODE1000,
722 * if it's 1000, then set it */
723 config = INL(dev, ChipConfig);
729 debug("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns");
731 OUTL(dev, config, ChipConfig);
734 /* Function: ns8382x_send
735 * Description: transmits a packet and waits for completion or timeout.
737 static int ns8382x_send(struct eth_device *dev, void *packet, int length)
742 /* Stop the transmitter */
743 OUTL(dev, TxOff, ChipCmd);
745 debug("ns8382x_send: sending %d bytes\n", (int)length);
747 /* set the transmit buffer descriptor and enable Transmit State Machine */
748 txd.link = cpu_to_le32(0x0);
749 txd.bufptr = cpu_to_le32(phys_to_bus((u32)packet));
750 txd.extsts = cpu_to_le32(0x0);
751 txd.cmdsts = cpu_to_le32(DescOwn | length);
753 /* load Transmit Descriptor Register */
754 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
756 debug("ns8382x_send: TX descriptor register loaded with: %#08X\n",
757 INL(dev, TxRingPtr));
758 debug("\ttxd.link:%X\tbufp:%X\texsts:%X\tcmdsts:%X\n",
759 le32_to_cpu(txd.link), le32_to_cpu(txd.bufptr),
760 le32_to_cpu(txd.extsts), le32_to_cpu(txd.cmdsts));
762 /* restart the transmitter */
763 OUTL(dev, TxOn, ChipCmd);
765 for (i = 0; (tx_stat = le32_to_cpu(txd.cmdsts)) & DescOwn; i++) {
766 if (i >= TOUT_LOOP) {
767 printf ("%s: tx error buffer not ready: txd.cmdsts %#lX\n",
773 if (!(tx_stat & DescPktOK)) {
774 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat);
778 debug("ns8382x_send: tx_stat: %#08lX\n", tx_stat);
785 /* Function: ns8382x_poll
786 * Description: checks for a received packet and returns it if found.
787 * Arguments: struct eth_device *dev: NIC data structure
788 * Returns: 1 if packet was received.
789 * 0 if no packet was received.
791 * Returns (copies) the packet to the array dev->packet.
792 * Returns the length of the packet.
796 ns8382x_poll(struct eth_device *dev)
800 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
802 if (!(rx_status & (u32) DescOwn))
805 debug("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n",
808 length = (rx_status & DSIZE) - CRC_SIZE;
810 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
811 /* corrupted packet received */
812 printf("ns8382x_poll: Corrupted packet, status:%lx\n", rx_status);
815 /* give packet to higher level routine */
816 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
820 /* return the descriptor and buffer to receive ring */
821 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
822 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
824 if (++cur_rx == NUM_RX_DESC)
827 /* re-enable the potentially idle receive state machine */
828 OUTL(dev, RxOn, ChipCmd);
833 /* Function: ns8382x_disable
834 * Description: Turns off interrupts and stops Tx and Rx engines
835 * Arguments: struct eth_device *dev: NIC data structure
840 ns8382x_disable(struct eth_device *dev)
842 /* Disable interrupts using the mask. */
843 OUTL(dev, 0, IntrMask);
844 OUTL(dev, 0, IntrEnable);
846 /* Stop the chip's Tx and Rx processes. */
847 OUTL(dev, (RxOff | TxOff), ChipCmd);
849 /* Restore PME enable bit */
850 OUTL(dev, SavedClkRun, ClkRun);