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 printf("ns8382x: Can not allocate memory\n");
347 memset(dev, 0, sizeof(*dev));
349 sprintf(dev->name, "dp8382x#%d", card_number);
350 dev->iobase = bus_to_phys(iobase);
351 dev->priv = (void *) devno;
352 dev->init = ns8382x_init;
353 dev->halt = ns8382x_disable;
354 dev->send = ns8382x_send;
355 dev->recv = ns8382x_poll;
357 /* ns8382x has a non-standard PM control register
358 * in PCI config space. Some boards apparently need
359 * to be brought to D0 in this manner. */
360 pci_read_config_dword(devno, PCIPM, &tmp);
361 if (tmp & (0x03 | 0x100)) { /* D0 state, disable PME assertion */
362 u32 newtmp = tmp & ~(0x03 | 0x100);
363 pci_write_config_dword(devno, PCIPM, newtmp);
366 /* get MAC address */
367 for (i = 0; i < 3; i++) {
369 char *mac = (char *)&dev->enetaddr[i * 2];
371 OUTL(dev, i * 2, RxFilterAddr);
372 data = INL(dev, RxFilterData);
376 /* get PHY address, can't be zero */
377 for (phyAddress = 1; phyAddress < 32; phyAddress++) {
380 phy1 = mdio_read(dev, phyAddress, PHYIDR1);
381 if (phy1 == 0x2000) { /*check for 83861/91 */
382 rev = mdio_read(dev, phyAddress, PHYIDR2);
383 if ((rev & ~(0x000f)) == 0x00005c50 ||
384 (rev & ~(0x000f)) == 0x00005c60) {
386 printf("phy rev is %x\n", rev);
387 printf("phy address is %x\n",
395 /* set phy to autonegotiate && advertise everything */
396 mdio_write(dev, phyAddress, KTCR,
397 (ktcr_adv_1000H | ktcr_adv_1000F));
398 mdio_write(dev, phyAddress, ANAR,
399 (anar_adv_100F | anar_adv_100H | anar_adv_10H |
400 anar_adv_10F | anar_ieee_8023));
401 mdio_write(dev, phyAddress, BMCR, 0x0); /*restore */
402 mdio_write(dev, phyAddress, BMCR,
403 (Bmcr_AutoNegEn | Bmcr_RstAutoNeg));
404 /* Reset the chip to erase any previous misconfiguration. */
405 OUTL(dev, (ChipReset), ChipCmd);
407 chip_config = INL(dev, ChipConfig);
409 OUTL(dev, (chip_config | PhyRst), ChipConfig);
410 /* power up and initialize transceiver */
411 OUTL(dev, (chip_config & ~(PhyDis)), ChipConfig);
413 mdio_sync(dev, EECtrl);
417 INL(dev, ChipConfig) ^ SpeedStatus_Polarity;
419 printf("%s: Transceiver 10%s %s duplex.\n", dev->name,
420 (chpcfg & GigSpeed) ? "00" : (chpcfg & HundSpeed)
422 chpcfg & FullDuplex ? "full" : "half");
423 printf("%s: %02x:%02x:%02x:%02x:%02x:%02x\n", dev->name,
424 dev->enetaddr[0], dev->enetaddr[1],
425 dev->enetaddr[2], dev->enetaddr[3],
426 dev->enetaddr[4], dev->enetaddr[5]);
430 * The PME bit is initialized from the EEPROM contents.
431 * PCI cards probably have PME disabled, but motherboard
432 * implementations may have PME set to enable WakeOnLan.
433 * With PME set the chip will scan incoming packets but
434 * nothing will be written to memory. */
435 SavedClkRun = INL(dev, ClkRun);
436 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
442 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x60);
449 /* MII transceiver control section.
450 Read and write MII registers using software-generated serial MDIO
451 protocol. See the MII specifications or DP83840A data sheet for details.
453 The maximum data clock rate is 2.5 MHz. To meet minimum timing we
454 must flush writes to the PCI bus with a PCI read. */
455 #define mdio_delay(mdio_addr) INL(dev, mdio_addr)
457 #define MDIO_EnbIn (0)
458 #define MDIO_WRITE0 (MDIO_EnbOutput)
459 #define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
461 /* Generate the preamble required for initial synchronization and
462 a few older transceivers. */
464 mdio_sync(struct eth_device *dev, u32 offset)
468 /* Establish sync by sending at least 32 logic ones. */
469 while (--bits >= 0) {
470 OUTL(dev, MDIO_WRITE1, offset);
472 OUTL(dev, MDIO_WRITE1 | MDIO_ShiftClk, offset);
478 mdio_read(struct eth_device *dev, int phy_id, int addr)
480 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | addr;
483 /* Shift the read command bits out. */
484 for (i = 15; i >= 0; i--) {
485 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
487 OUTL(dev, dataval, EECtrl);
489 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
492 /* Read the two transition, 16 data, and wire-idle bits. */
493 for (i = 19; i > 0; i--) {
494 OUTL(dev, MDIO_EnbIn, EECtrl);
497 (retval << 1) | ((INL(dev, EECtrl) & MDIO_Data) ? 1 : 0);
498 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
501 return (retval >> 1) & 0xffff;
505 mdio_write(struct eth_device *dev, int phy_id, int addr, int value)
507 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (addr << 18) | value;
510 /* Shift the command bits out. */
511 for (i = 31; i >= 0; i--) {
512 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
514 OUTL(dev, dataval, EECtrl);
516 OUTL(dev, dataval | MDIO_ShiftClk, EECtrl);
519 /* Clear out extra bits. */
520 for (i = 2; i > 0; i--) {
521 OUTL(dev, MDIO_EnbIn, EECtrl);
523 OUTL(dev, MDIO_EnbIn | MDIO_ShiftClk, EECtrl);
529 /* Function: ns8382x_init
530 * Description: resets the ethernet controller chip and configures
531 * registers and data structures required for sending and receiving packets.
532 * Arguments: struct eth_device *dev: NIC data structure
537 ns8382x_init(struct eth_device *dev, bd_t * bis)
544 * The PME bit is initialized from the EEPROM contents.
545 * PCI cards probably have PME disabled, but motherboard
546 * implementations may have PME set to enable WakeOnLan.
547 * With PME set the chip will scan incoming packets but
548 * nothing will be written to memory. */
549 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
551 ns8382x_init_rxfilter(dev);
552 ns8382x_init_txd(dev);
553 ns8382x_init_rxd(dev);
555 /*set up ChipConfig */
556 config = INL(dev, ChipConfig);
557 /*turn off 64 bit ops && Ten-bit interface
558 * && big-endian mode && extended status */
559 config &= ~(TBIEn | Mode1000 | T64En | D64En | M64En | BEMode | PhyDis | ExtStEn);
560 OUTL(dev, config, ChipConfig);
562 /* Configure the PCI bus bursts and FIFO thresholds. */
563 tx_config = TxCarrierIgn | TxHeartIgn | TxAutoPad
564 | TxCollRetry | TxMxdma_1024 | (0x1002);
565 rx_config = RxMxdma_1024 | 0x20;
567 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
568 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
570 OUTL(dev, tx_config, TxConfig);
571 OUTL(dev, rx_config, RxConfig);
573 /*turn off priority queueing */
574 OUTL(dev, 0x0, PriQueue);
576 ns8382x_check_duplex(dev);
577 ns8382x_set_rx_mode(dev);
579 OUTL(dev, (RxOn | TxOn), ChipCmd);
583 /* Function: ns8382x_reset
584 * Description: soft resets the controller chip
585 * Arguments: struct eth_device *dev: NIC data structure
589 ns8382x_reset(struct eth_device *dev)
591 OUTL(dev, ChipReset, ChipCmd);
592 while (INL(dev, ChipCmd))
593 /*wait until done */ ;
594 OUTL(dev, 0, IntrMask);
595 OUTL(dev, 0, IntrEnable);
598 /* Function: ns8382x_init_rxfilter
599 * Description: sets receive filter address to our MAC address
600 * Arguments: struct eth_device *dev: NIC data structure
605 ns8382x_init_rxfilter(struct eth_device *dev)
609 for (i = 0; i < ETH_ALEN; i += 2) {
610 OUTL(dev, i, RxFilterAddr);
611 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
616 /* Function: ns8382x_init_txd
617 * Description: initializes the Tx descriptor
618 * Arguments: struct eth_device *dev: NIC data structure
623 ns8382x_init_txd(struct eth_device *dev)
626 txd.bufptr = cpu_to_le32((u32) & txb[0]);
627 txd.cmdsts = (u32) 0;
628 txd.extsts = (u32) 0;
630 OUTL(dev, 0x0, TxRingPtrHi);
631 OUTL(dev, phys_to_bus((u32)&txd), TxRingPtr);
633 printf("ns8382x_init_txd: TX descriptor register loaded with: %#08X (&txd: %p)\n",
634 INL(dev, TxRingPtr), &txd);
638 /* Function: ns8382x_init_rxd
639 * Description: initializes the Rx descriptor ring
640 * Arguments: struct eth_device *dev: NIC data structure
645 ns8382x_init_rxd(struct eth_device *dev)
649 OUTL(dev, 0x0, RxRingPtrHi);
652 for (i = 0; i < NUM_RX_DESC; i++) {
655 NUM_RX_DESC) ? (u32) & rxd[i +
658 rxd[i].extsts = cpu_to_le32((u32) 0x0);
659 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
660 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
663 ("ns8382x_init_rxd: rxd[%d]=%p link=%X cmdsts=%X bufptr=%X\n",
664 i, &rxd[i], le32_to_cpu(rxd[i].link),
665 le32_to_cpu(rxd[i].cmdsts), le32_to_cpu(rxd[i].bufptr));
668 OUTL(dev, phys_to_bus((u32) & rxd), RxRingPtr);
671 printf("ns8382x_init_rxd: RX descriptor register loaded with: %X\n",
672 INL(dev, RxRingPtr));
676 /* Function: ns8382x_set_rx_mode
678 * sets the receive mode to accept all broadcast packets and packets
679 * with our MAC address, and reject all multicast packets.
680 * Arguments: struct eth_device *dev: NIC data structure
685 ns8382x_set_rx_mode(struct eth_device *dev)
688 /*spec says RxFilterEnable has to be 0 for rest of
689 * this stuff to be properly configured. Linux driver
690 * seems to support this*/
691 /* OUTL(dev, rx_mode, RxFilterAddr);*/
692 rx_mode = (RxFilterEnable | AcceptAllBroadcast | AcceptPerfectMatch);
693 OUTL(dev, rx_mode, RxFilterAddr);
694 printf("ns8382x_set_rx_mode: set to %X\n", rx_mode);
695 /*now we turn RxFilterEnable back on */
696 /*rx_mode |= RxFilterEnable;
697 OUTL(dev, rx_mode, RxFilterAddr);*/
701 ns8382x_check_duplex(struct eth_device *dev)
706 int config = (INL(dev, ChipConfig) ^ SpeedStatus_Polarity);
708 duplex = (config & FullDuplex) ? 1 : 0;
709 gig = (config & GigSpeed) ? 1 : 0;
710 hun = (config & HundSpeed) ? 1 : 0;
712 printf("%s: Setting 10%s %s-duplex based on negotiated link"
713 " capability.\n", dev->name, (gig) ? "00" : (hun) ? "0" : "",
714 duplex ? "full" : "half");
717 rx_config |= RxAcceptTx;
718 tx_config |= (TxCarrierIgn | TxHeartIgn);
720 rx_config &= ~RxAcceptTx;
721 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
724 printf("%s: Resetting TxConfig Register %#08X\n", dev->name, tx_config);
725 printf("%s: Resetting RxConfig Register %#08X\n", dev->name, rx_config);
727 OUTL(dev, tx_config, TxConfig);
728 OUTL(dev, rx_config, RxConfig);
730 /*if speed is 10 or 100, remove MODE1000,
731 * if it's 1000, then set it */
732 config = INL(dev, ChipConfig);
739 printf("%s: %setting Mode1000\n", dev->name, (gig) ? "S" : "Uns");
741 OUTL(dev, config, ChipConfig);
744 /* Function: ns8382x_send
745 * Description: transmits a packet and waits for completion or timeout.
748 ns8382x_send(struct eth_device *dev, volatile void *packet, int length)
753 /* Stop the transmitter */
754 OUTL(dev, TxOff, ChipCmd);
756 printf("ns8382x_send: sending %d bytes\n", (int)length);
759 /* set the transmit buffer descriptor and enable Transmit State Machine */
760 txd.link = cpu_to_le32(0x0);
761 txd.bufptr = cpu_to_le32(phys_to_bus((u32)packet));
762 txd.extsts = cpu_to_le32(0x0);
763 txd.cmdsts = cpu_to_le32(DescOwn | length);
765 /* load Transmit Descriptor Register */
766 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
768 printf("ns8382x_send: TX descriptor register loaded with: %#08X\n",
769 INL(dev, TxRingPtr));
770 printf("\ttxd.link:%X\tbufp:%X\texsts:%X\tcmdsts:%X\n",
771 le32_to_cpu(txd.link), le32_to_cpu(txd.bufptr),
772 le32_to_cpu(txd.extsts), le32_to_cpu(txd.cmdsts));
774 /* restart the transmitter */
775 OUTL(dev, TxOn, ChipCmd);
777 for (i = 0; (tx_stat = le32_to_cpu(txd.cmdsts)) & DescOwn; i++) {
778 if (i >= TOUT_LOOP) {
779 printf ("%s: tx error buffer not ready: txd.cmdsts %#lX\n",
785 if (!(tx_stat & DescPktOK)) {
786 printf("ns8382x_send: Transmit error, Tx status %lX.\n", tx_stat);
790 printf("ns8382x_send: tx_stat: %#08X\n", tx_stat);
798 /* Function: ns8382x_poll
799 * Description: checks for a received packet and returns it if found.
800 * Arguments: struct eth_device *dev: NIC data structure
801 * Returns: 1 if packet was received.
802 * 0 if no packet was received.
804 * Returns (copies) the packet to the array dev->packet.
805 * Returns the length of the packet.
809 ns8382x_poll(struct eth_device *dev)
813 vu_long rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
815 if (!(rx_status & (u32) DescOwn))
818 printf("ns8382x_poll: got a packet: cur_rx:%u, status:%lx\n",
821 length = (rx_status & DSIZE) - CRC_SIZE;
823 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
824 /* corrupted packet received */
825 printf("ns8382x_poll: Corrupted packet, status:%lx\n", rx_status);
828 /* give packet to higher level routine */
829 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
833 /* return the descriptor and buffer to receive ring */
834 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
835 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
837 if (++cur_rx == NUM_RX_DESC)
840 /* re-enable the potentially idle receive state machine */
841 OUTL(dev, RxOn, ChipCmd);
846 /* Function: ns8382x_disable
847 * Description: Turns off interrupts and stops Tx and Rx engines
848 * Arguments: struct eth_device *dev: NIC data structure
853 ns8382x_disable(struct eth_device *dev)
855 /* Disable interrupts using the mask. */
856 OUTL(dev, 0, IntrMask);
857 OUTL(dev, 0, IntrEnable);
859 /* Stop the chip's Tx and Rx processes. */
860 OUTL(dev, (RxOff | TxOff), ChipCmd);
862 /* Restore PME enable bit */
863 OUTL(dev, SavedClkRun, ClkRun);