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
63 #define TOUT_LOOP 500000
64 #define TX_BUF_SIZE 1536
65 #define RX_BUF_SIZE 1536
66 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */
68 enum register_offsets {
99 GigSpeed = 0x40000000,
100 HundSpeed = 0x20000000,
101 FullDuplex = 0x10000000,
103 Mode1000 = 0x00400000,
109 ExtStEn = 0x00000100,
112 #define SpeedStatus_Polarity ( GigSpeed | HundSpeed | FullDuplex)
115 TxDrthMask = 0x000000ff,
116 TxFlthMask = 0x0000ff00,
117 TxMxdmaMask = 0x00700000,
118 TxMxdma_8 = 0x00100000,
119 TxMxdma_16 = 0x00200000,
120 TxMxdma_32 = 0x00300000,
121 TxMxdma_64 = 0x00400000,
122 TxMxdma_128 = 0x00500000,
123 TxMxdma_256 = 0x00600000,
124 TxMxdma_512 = 0x00700000,
125 TxMxdma_1024 = 0x00000000,
126 TxCollRetry = 0x00800000,
127 TxAutoPad = 0x10000000,
128 TxMacLoop = 0x20000000,
129 TxHeartIgn = 0x40000000,
130 TxCarrierIgn = 0x80000000
134 RxDrthMask = 0x0000003e,
135 RxMxdmaMask = 0x00700000,
136 RxMxdma_8 = 0x00100000,
137 RxMxdma_16 = 0x00200000,
138 RxMxdma_32 = 0x00300000,
139 RxMxdma_64 = 0x00400000,
140 RxMxdma_128 = 0x00500000,
141 RxMxdma_256 = 0x00600000,
142 RxMxdma_512 = 0x00700000,
143 RxMxdma_1024 = 0x00000000,
144 RxAcceptLenErr = 0x04000000,
145 RxAcceptLong = 0x08000000,
146 RxAcceptTx = 0x10000000,
147 RxStripCRC = 0x20000000,
148 RxAcceptRunt = 0x40000000,
149 RxAcceptErr = 0x80000000,
152 /* Bits in the RxMode register. */
154 RxFilterEnable = 0x80000000,
155 AcceptAllBroadcast = 0x40000000,
156 AcceptAllMulticast = 0x20000000,
157 AcceptAllUnicast = 0x10000000,
158 AcceptPerfectMatch = 0x08000000,
161 typedef struct _BufferDesc {
165 u32 extsts; /*not used here */
168 /* Bits in network_desc.status */
169 enum desc_status_bits {
170 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000,
171 DescNoCRC = 0x10000000, DescPktOK = 0x08000000,
172 DescSizeMask = 0xfff,
174 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
175 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
176 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
177 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
179 DescRxAbort = 0x04000000, DescRxOver = 0x02000000,
180 DescRxDest = 0x01800000, DescRxLong = 0x00400000,
181 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000,
182 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000,
183 DescRxLoop = 0x00020000, DesRxColl = 0x00010000,
188 MDIO_ShiftClk = 0x0040,
189 MDIO_EnbOutput = 0x0020,
193 /* PHY Register offsets. */
194 enum phy_reg_offsets {
203 /* basic mode control register bits */
207 Bmcr_Speed0 = 0x2000,
208 Bmcr_AutoNegEn = 0x1000, /*if set ignores Duplex, Speed[01] */
209 Bmcr_RstAutoNeg = 0x0200,
210 Bmcr_Duplex = 0x0100,
211 Bmcr_Speed1 = 0x0040,
212 Bmcr_Force10H = 0x0000,
213 Bmcr_Force10F = 0x0100,
214 Bmcr_Force100H = 0x2000,
215 Bmcr_Force100F = 0x2100,
216 Bmcr_Force1000H = 0x0040,
217 Bmcr_Force1000F = 0x0140,
220 /* auto negotiation advertisement register */
222 anar_adv_100F = 0x0100,
223 anar_adv_100H = 0x0080,
224 anar_adv_10F = 0x0040,
225 anar_adv_10H = 0x0020,
226 anar_ieee_8023 = 0x0001,
229 /* 1K-base T control register */
231 ktcr_adv_1000H = 0x0100,
232 ktcr_adv_1000F = 0x0200,
236 static u32 SavedClkRun;
237 static unsigned int cur_rx;
238 static unsigned int rx_config;
239 static unsigned int tx_config;
241 /* Note: transmit and receive buffers and descriptors must be
242 long long word aligned */
243 static BufferDesc txd __attribute__ ((aligned(8)));
244 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(8)));
245 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(8)));
246 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE]
247 __attribute__ ((aligned(8)));
249 /* Function Prototypes */
250 static int mdio_read(struct eth_device *dev, int phy_id, int addr);
251 static void mdio_write(struct eth_device *dev, int phy_id, int addr, int value);
252 static void mdio_sync(struct eth_device *dev, u32 offset);
253 static int ns8382x_init(struct eth_device *dev, bd_t * bis);
254 static void ns8382x_reset(struct eth_device *dev);
255 static void ns8382x_init_rxfilter(struct eth_device *dev);
256 static void ns8382x_init_txd(struct eth_device *dev);
257 static void ns8382x_init_rxd(struct eth_device *dev);
258 static void ns8382x_set_rx_mode(struct eth_device *dev);
259 static void ns8382x_check_duplex(struct eth_device *dev);
260 static int ns8382x_send(struct eth_device *dev, void *packet, int length);
261 static int ns8382x_poll(struct eth_device *dev);
262 static void ns8382x_disable(struct eth_device *dev);
264 static struct pci_device_id supported[] = {
265 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83820},
269 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
270 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
273 INW(struct eth_device *dev, u_long addr)
275 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
279 INL(struct eth_device *dev, u_long addr)
281 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
285 OUTW(struct eth_device *dev, int command, u_long addr)
287 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
291 OUTL(struct eth_device *dev, int command, u_long addr)
293 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
296 /* Function: ns8382x_initialize
297 * Description: Retrieves the MAC address of the card, and sets up some
298 * globals required by other routines, and initializes the NIC, making it
299 * ready to send and receive packets.
300 * Side effects: initializes ns8382xs, ready to receive packets.
301 * Returns: int: number of cards found
305 ns8382x_initialize(bd_t * bis)
309 struct eth_device *dev;
316 while (1) { /* Find PCI device(s) */
317 if ((devno = pci_find_devices(supported, idx++)) < 0)
320 pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
321 iobase &= ~0x3; /* 1: unused and 0:I/O Space Indicator */
323 debug("ns8382x: NatSemi dp8382x @ 0x%x\n", iobase);
325 pci_write_config_dword(devno, PCI_COMMAND,
326 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
328 /* Check if I/O accesses and Bus Mastering are enabled. */
329 pci_read_config_dword(devno, PCI_COMMAND, &status);
330 if (!(status & PCI_COMMAND_MEMORY)) {
331 printf("Error: Can not enable MEM access.\n");
333 } else if (!(status & PCI_COMMAND_MASTER)) {
334 printf("Error: Can not enable Bus Mastering.\n");
338 dev = (struct eth_device *) malloc(sizeof *dev);
340 printf("ns8382x: Can not allocate memory\n");
343 memset(dev, 0, sizeof(*dev));
345 sprintf(dev->name, "dp8382x#%d", card_number);
346 dev->iobase = bus_to_phys(iobase);
347 dev->priv = (void *) devno;
348 dev->init = ns8382x_init;
349 dev->halt = ns8382x_disable;
350 dev->send = ns8382x_send;
351 dev->recv = ns8382x_poll;
353 /* ns8382x has a non-standard PM control register
354 * in PCI config space. Some boards apparently need
355 * to be brought to D0 in this manner. */
356 pci_read_config_dword(devno, PCIPM, &tmp);
357 if (tmp & (0x03 | 0x100)) { /* D0 state, disable PME assertion */
358 u32 newtmp = tmp & ~(0x03 | 0x100);
359 pci_write_config_dword(devno, PCIPM, newtmp);
362 /* get MAC address */
363 for (i = 0; i < 3; i++) {
365 char *mac = (char *)&dev->enetaddr[i * 2];
367 OUTL(dev, i * 2, RxFilterAddr);
368 data = INL(dev, RxFilterData);
372 /* get PHY address, can't be zero */
373 for (phyAddress = 1; phyAddress < 32; phyAddress++) {
376 phy1 = mdio_read(dev, phyAddress, PHYIDR1);
377 if (phy1 == 0x2000) { /*check for 83861/91 */
378 rev = mdio_read(dev, phyAddress, PHYIDR2);
379 if ((rev & ~(0x000f)) == 0x00005c50 ||
380 (rev & ~(0x000f)) == 0x00005c60) {
381 debug("phy rev is %x\n", rev);
382 debug("phy address is %x\n",
389 /* set phy to autonegotiate && advertise everything */
390 mdio_write(dev, phyAddress, KTCR,
391 (ktcr_adv_1000H | ktcr_adv_1000F));
392 mdio_write(dev, phyAddress, ANAR,
393 (anar_adv_100F | anar_adv_100H | anar_adv_10H |
394 anar_adv_10F | anar_ieee_8023));
395 mdio_write(dev, phyAddress, BMCR, 0x0); /*restore */
396 mdio_write(dev, phyAddress, BMCR,
397 (Bmcr_AutoNegEn | Bmcr_RstAutoNeg));
398 /* Reset the chip to erase any previous misconfiguration. */
399 OUTL(dev, (ChipReset), ChipCmd);
401 chip_config = INL(dev, ChipConfig);
403 OUTL(dev, (chip_config | PhyRst), ChipConfig);
404 /* power up and initialize transceiver */
405 OUTL(dev, (chip_config & ~(PhyDis)), ChipConfig);
407 mdio_sync(dev, EECtrl);
411 INL(dev, ChipConfig) ^ SpeedStatus_Polarity;
413 debug("%s: Transceiver 10%s %s duplex.\n", dev->name,
414 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed)
416 chpcfg & FullDuplex ? "full" : "half");
417 debug("%s: %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
418 dev->enetaddr[0], dev->enetaddr[1],
419 dev->enetaddr[2], dev->enetaddr[3],
420 dev->enetaddr[4], dev->enetaddr[5]);
424 * The PME bit is initialized from the EEPROM contents.
425 * PCI cards probably have PME disabled, but motherboard
426 * implementations may have PME set to enable WakeOnLan.
427 * With PME set the chip will scan incoming packets but
428 * nothing will be written to memory. */
429 SavedClkRun = INL(dev, ClkRun);
430 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
436 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x60);
443 /* MII transceiver control section.
444 Read and write MII registers using software-generated serial MDIO
445 protocol. See the MII specifications or DP83840A data sheet for details.
447 The maximum data clock rate is 2.5 MHz. To meet minimum timing we
448 must flush writes to the PCI bus with a PCI read. */
449 #define mdio_delay(mdio_addr) INL(dev, mdio_addr)
451 #define MDIO_EnbIn (0)
452 #define MDIO_WRITE0 (MDIO_EnbOutput)
453 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
455 /* Generate the preamble required for initial synchronization and
456 a few older transceivers. */
458 mdio_sync(struct eth_device *dev, u32 offset)
462 /* Establish sync by sending at least 32 logic ones. */
463 while (--bits >= 0) {
464 OUTL(dev, MDIO_WRITE1, offset);
466 OUTL(dev, MDIO_WRITE1 | MDIO_ShiftClk, offset);
472 mdio_read(struct eth_device *dev, int phy_id, int addr)
474 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | addr;
477 /* Shift the read command bits out. */
478 for (i = 15; i >= 0; i--) {
479 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
481 OUTL(dev, dataval, EECtrl);
483 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
486 /* Read the two transition, 16 data, and wire-idle bits. */
487 for (i = 19; i > 0; i--) {
488 OUTL(dev, MDIO_EnbIn, EECtrl);
491 (retval << 1) | ((INL(dev, EECtrl) & MDIO_Data) ? 1 : 0);
492 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
495 return (retval >> 1) & 0xffff;
499 mdio_write(struct eth_device *dev, int phy_id, int addr, int value)
501 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (addr << 18) | value;
504 /* Shift the command bits out. */
505 for (i = 31; i >= 0; i--) {
506 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
508 OUTL(dev, dataval, EECtrl);
510 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
513 /* Clear out extra bits. */
514 for (i = 2; i > 0; i--) {
515 OUTL(dev, MDIO_EnbIn, EECtrl);
517 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
523 /* Function: ns8382x_init
524 * Description: resets the ethernet controller chip and configures
525 * registers and data structures required for sending and receiving packets.
526 * Arguments: struct eth_device *dev: NIC data structure
531 ns8382x_init(struct eth_device *dev, bd_t * bis)
538 * The PME bit is initialized from the EEPROM contents.
539 * PCI cards probably have PME disabled, but motherboard
540 * implementations may have PME set to enable WakeOnLan.
541 * With PME set the chip will scan incoming packets but
542 * nothing will be written to memory. */
543 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
545 ns8382x_init_rxfilter(dev);
546 ns8382x_init_txd(dev);
547 ns8382x_init_rxd(dev);
549 /*set up ChipConfig */
550 config = INL(dev, ChipConfig);
551 /*turn off 64 bit ops && Ten-bit interface
552 * && big-endian mode && extended status */
553 config &= ~(TBIEn | Mode1000 | T64En | D64En | M64En | BEMode | PhyDis | ExtStEn);
554 OUTL(dev, config, ChipConfig);
556 /* Configure the PCI bus bursts and FIFO thresholds. */
557 tx_config = TxCarrierIgn | TxHeartIgn | TxAutoPad
558 | TxCollRetry | TxMxdma_1024 | (0x1002);
559 rx_config = RxMxdma_1024 | 0x20;
561 debug("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
562 debug("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
564 OUTL(dev, tx_config, TxConfig);
565 OUTL(dev, rx_config, RxConfig);
567 /*turn off priority queueing */
568 OUTL(dev, 0x0, PriQueue);
570 ns8382x_check_duplex(dev);
571 ns8382x_set_rx_mode(dev);
573 OUTL(dev, (RxOn | TxOn), ChipCmd);
577 /* Function: ns8382x_reset
578 * Description: soft resets the controller chip
579 * Arguments: struct eth_device *dev: NIC data structure
583 ns8382x_reset(struct eth_device *dev)
585 OUTL(dev, ChipReset, ChipCmd);
586 while (INL(dev, ChipCmd))
587 /*wait until done */ ;
588 OUTL(dev, 0, IntrMask);
589 OUTL(dev, 0, IntrEnable);
592 /* Function: ns8382x_init_rxfilter
593 * Description: sets receive filter address to our MAC address
594 * Arguments: struct eth_device *dev: NIC data structure
599 ns8382x_init_rxfilter(struct eth_device *dev)
603 for (i = 0; i < ETH_ALEN; i += 2) {
604 OUTL(dev, i, RxFilterAddr);
605 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
610 /* Function: ns8382x_init_txd
611 * Description: initializes the Tx descriptor
612 * Arguments: struct eth_device *dev: NIC data structure
617 ns8382x_init_txd(struct eth_device *dev)
620 txd.bufptr = cpu_to_le32((u32) & txb[0]);
621 txd.cmdsts = (u32) 0;
622 txd.extsts = (u32) 0;
624 OUTL(dev, 0x0, TxRingPtrHi);
625 OUTL(dev, phys_to_bus((u32)&txd), TxRingPtr);
627 debug("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n",
628 INL(dev, TxRingPtr), &txd);
631 /* Function: ns8382x_init_rxd
632 * Description: initializes the Rx descriptor ring
633 * Arguments: struct eth_device *dev: NIC data structure
638 ns8382x_init_rxd(struct eth_device *dev)
642 OUTL(dev, 0x0, RxRingPtrHi);
645 for (i = 0; i < NUM_RX_DESC; i++) {
648 NUM_RX_DESC) ? (u32) & rxd[i +
651 rxd[i].extsts = cpu_to_le32((u32) 0x0);
652 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
653 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
656 ("ns8382x_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%X\n",
657 i, &rxd[i], le32_to_cpu(rxd[i].link),
658 le32_to_cpu(rxd[i].cmdsts), le32_to_cpu(rxd[i].bufptr));
660 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr);
662 debug("ns8382x_init_rxd: RX descriptor register loaded with: %X\n",
663 INL(dev, RxRingPtr));
666 /* Function: ns8382x_set_rx_mode
668 * sets the receive mode to accept all broadcast packets and packets
669 * with our MAC address, and reject all multicast packets.
670 * Arguments: struct eth_device *dev: NIC data structure
675 ns8382x_set_rx_mode(struct eth_device *dev)
678 /*spec says RxFilterEnable has to be 0 for rest of
679 * this stuff to be properly configured. Linux driver
680 * seems to support this*/
681 /* OUTL(dev, rx_mode, RxFilterAddr);*/
682 rx_mode = (RxFilterEnable | AcceptAllBroadcast | AcceptPerfectMatch);
683 OUTL(dev, rx_mode, RxFilterAddr);
684 printf("ns8382x_set_rx_mode: set to %X\n", rx_mode);
685 /*now we turn RxFilterEnable back on */
686 /*rx_mode |= RxFilterEnable;
687 OUTL(dev, rx_mode, RxFilterAddr);*/
691 ns8382x_check_duplex(struct eth_device *dev)
696 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity);
698 duplex = (config & FullDuplex) ? 1 : 0;
699 gig = (config & GigSpeed) ? 1 : 0;
700 hun = (config & HundSpeed) ? 1 : 0;
702 debug("%s: Setting 10%s %s-duplex based on negotiated link"
703 " capability.\n", dev->name, (gig) ? "00" : (hun) ? "0" : "",
704 duplex ? "full" : "half");
707 rx_config |= RxAcceptTx;
708 tx_config |= (TxCarrierIgn | TxHeartIgn);
710 rx_config &= ~RxAcceptTx;
711 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
714 debug("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config);
715 debug("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config);
717 OUTL(dev, tx_config, TxConfig);
718 OUTL(dev, rx_config, RxConfig);
720 /*if speed is 10 or 100, remove MODE1000,
721 * if it's 1000, then set it */
722 config = INL(dev, ChipConfig);
728 debug("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns");
730 OUTL(dev, config, ChipConfig);
733 /* Function: ns8382x_send
734 * Description: transmits a packet and waits for completion or timeout.
736 static int ns8382x_send(struct eth_device *dev, void *packet, int length)
741 /* Stop the transmitter */
742 OUTL(dev, TxOff, ChipCmd);
744 debug("ns8382x_send: sending %d bytes\n", (int)length);
746 /* set the transmit buffer descriptor and enable Transmit State Machine */
747 txd.link = cpu_to_le32(0x0);
748 txd.bufptr = cpu_to_le32(phys_to_bus((u32)packet));
749 txd.extsts = cpu_to_le32(0x0);
750 txd.cmdsts = cpu_to_le32(DescOwn | length);
752 /* load Transmit Descriptor Register */
753 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
755 debug("ns8382x_send: TX descriptor register loaded with: %#08X\n",
756 INL(dev, TxRingPtr));
757 debug("\ttxd.link:%X\tbufp:%X\texsts:%X\tcmdsts:%X\n",
758 le32_to_cpu(txd.link), le32_to_cpu(txd.bufptr),
759 le32_to_cpu(txd.extsts), le32_to_cpu(txd.cmdsts));
761 /* restart the transmitter */
762 OUTL(dev, TxOn, ChipCmd);
764 for (i = 0; (tx_stat = le32_to_cpu(txd.cmdsts)) & DescOwn; i++) {
765 if (i >= TOUT_LOOP) {
766 printf ("%s: tx error buffer not ready: txd.cmdsts %#lX\n",
772 if (!(tx_stat & DescPktOK)) {
773 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat);
777 debug("ns8382x_send: tx_stat: %#08lX\n", tx_stat);
784 /* Function: ns8382x_poll
785 * Description: checks for a received packet and returns it if found.
786 * Arguments: struct eth_device *dev: NIC data structure
787 * Returns: 1 if packet was received.
788 * 0 if no packet was received.
790 * Returns (copies) the packet to the array dev->packet.
791 * Returns the length of the packet.
795 ns8382x_poll(struct eth_device *dev)
799 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
801 if (!(rx_status & (u32) DescOwn))
804 debug("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n",
807 length = (rx_status & DSIZE) - CRC_SIZE;
809 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
810 /* corrupted packet received */
811 printf("ns8382x_poll: Corrupted packet, status:%lx\n",
815 /* give packet to higher level routine */
816 net_process_received_packet((rxb + cur_rx * RX_BUF_SIZE),
821 /* return the descriptor and buffer to receive ring */
822 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
823 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
825 if (++cur_rx == NUM_RX_DESC)
828 /* re-enable the potentially idle receive state machine */
829 OUTL(dev, RxOn, ChipCmd);
834 /* Function: ns8382x_disable
835 * Description: Turns off interrupts and stops Tx and Rx engines
836 * Arguments: struct eth_device *dev: NIC data structure
841 ns8382x_disable(struct eth_device *dev)
843 /* Disable interrupts using the mask. */
844 OUTL(dev, 0, IntrMask);
845 OUTL(dev, 0, IntrEnable);
847 /* Stop the chip's Tx and Rx processes. */
848 OUTL(dev, (RxOff | TxOff), ChipCmd);
850 /* Restore PME enable bit */
851 OUTL(dev, SavedClkRun, ClkRun);