2 natsemi.c: A U-Boot driver for the NatSemi DP8381x series.
3 Author: Mark A. Rakes (mark_rakes@vivato.net)
5 Adapted from an Etherboot driver written by:
7 Copyright (C) 2001 Entity Cyber, Inc.
9 This development of this Etherboot driver was funded by
11 Sicom Systems: http://www.sicompos.com/
13 Author: Marty Connor (mdc@thinguin.org)
14 Adapted from a Linux driver which was written by Donald Becker
16 This software may be used and distributed according to the terms
17 of the GNU Public License (GPL), incorporated herein by reference.
19 Original Copyright Notice:
21 Written/copyright 1999-2001 by Donald Becker.
23 This software may be used and distributed according to the terms of
24 the GNU General Public License (GPL), incorporated herein by reference.
25 Drivers based on or derived from this code fall under the GPL and must
26 retain the authorship, copyright and license notice. This file is not
27 a complete program and may only be used when the entire operating
28 system is licensed under the GPL. License for under other terms may be
29 available. Contact the original author for details.
31 The original author may be reached as becker@scyld.com, or at
32 Scyld Computing Corporation
33 410 Severn Ave., Suite 210
36 Support information and updates available at
37 http://www.scyld.com/network/netsemi.html
40 http://www.scyld.com/expert/100mbps.html
41 http://www.scyld.com/expert/NWay.html
42 Datasheet is available from:
43 http://www.national.com/pf/DP/DP83815.html
47 * October 2002 mar 1.0
48 * Initial U-Boot Release. Tested with Netgear FA311 board
49 * and dp83815 chipset on custom board
61 #define EEPROM_SIZE 0xb /*12 16-bit chunks, or 24 bytes*/
63 #define DSIZE 0x00000FFF
66 #define TOUT_LOOP 500000
67 #define TX_BUF_SIZE 1536
68 #define RX_BUF_SIZE 1536
69 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */
71 /* Offsets to the device registers.
72 Unlike software-only systems, device drivers interact with complex hardware.
73 It's not useful to define symbolic names for every register bit in the
75 enum register_offsets {
92 /* These are from the spec, around page 78... on a separate table. */
100 /* Bit in ChipCmd. */
111 enum ChipConfigBits {
112 LinkSts = 0x80000000,
113 HundSpeed = 0x40000000,
114 FullDuplex = 0x20000000,
115 TenPolarity = 0x10000000,
116 AnegDone = 0x08000000,
117 AnegEnBothBoth = 0x0000E000,
118 AnegDis100Full = 0x0000C000,
119 AnegEn100Both = 0x0000A000,
120 AnegDis100Half = 0x00008000,
121 AnegEnBothHalf = 0x00006000,
122 AnegDis10Full = 0x00004000,
123 AnegEn10Both = 0x00002000,
124 DuplexMask = 0x00008000,
125 SpeedMask = 0x00004000,
126 AnegMask = 0x00002000,
127 AnegDis10Half = 0x00000000,
131 BootRomDisable = 0x00000004,
138 TxMxdmaMask = 0x700000,
140 TxMxdma_4 = 0x100000,
141 TxMxdma_8 = 0x200000,
142 TxMxdma_16 = 0x300000,
143 TxMxdma_32 = 0x400000,
144 TxMxdma_64 = 0x500000,
145 TxMxdma_128 = 0x600000,
146 TxMxdma_256 = 0x700000,
147 TxCollRetry = 0x800000,
148 TxAutoPad = 0x10000000,
149 TxMacLoop = 0x20000000,
150 TxHeartIgn = 0x40000000,
151 TxCarrierIgn = 0x80000000
156 RxMxdmaMask = 0x700000,
158 RxMxdma_4 = 0x100000,
159 RxMxdma_8 = 0x200000,
160 RxMxdma_16 = 0x300000,
161 RxMxdma_32 = 0x400000,
162 RxMxdma_64 = 0x500000,
163 RxMxdma_128 = 0x600000,
164 RxMxdma_256 = 0x700000,
165 RxAcceptLong = 0x8000000,
166 RxAcceptTx = 0x10000000,
167 RxAcceptRunt = 0x40000000,
168 RxAcceptErr = 0x80000000
171 /* Bits in the RxMode register. */
175 AcceptBroadcast = 0xC0000000,
176 AcceptMulticast = 0x00200000,
177 AcceptAllMulticast = 0x20000000,
178 AcceptAllPhys = 0x10000000,
179 AcceptMyPhys = 0x08000000
182 typedef struct _BufferDesc {
189 /* Bits in network_desc.status */
190 enum desc_status_bits {
191 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000,
192 DescNoCRC = 0x10000000, DescPktOK = 0x08000000,
193 DescSizeMask = 0xfff,
195 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
196 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
197 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
198 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
200 DescRxAbort = 0x04000000, DescRxOver = 0x02000000,
201 DescRxDest = 0x01800000, DescRxLong = 0x00400000,
202 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000,
203 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000,
204 DescRxLoop = 0x00020000, DesRxColl = 0x00010000,
209 static int natsemi_debug = 0; /* 1 verbose debugging, 0 normal */
211 static u32 SavedClkRun;
212 static unsigned int cur_rx;
213 static unsigned int advertising;
214 static unsigned int rx_config;
215 static unsigned int tx_config;
217 /* Note: transmit and receive buffers and descriptors must be
219 static BufferDesc txd __attribute__ ((aligned(4)));
220 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(4)));
222 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(4)));
223 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE]
224 __attribute__ ((aligned(4)));
226 /* Function Prototypes */
228 static void write_eeprom(struct eth_device *dev, long addr, int location,
231 static int read_eeprom(struct eth_device *dev, long addr, int location);
232 static int mdio_read(struct eth_device *dev, int phy_id, int location);
233 static int natsemi_init(struct eth_device *dev, bd_t * bis);
234 static void natsemi_reset(struct eth_device *dev);
235 static void natsemi_init_rxfilter(struct eth_device *dev);
236 static void natsemi_init_txd(struct eth_device *dev);
237 static void natsemi_init_rxd(struct eth_device *dev);
238 static void natsemi_set_rx_mode(struct eth_device *dev);
239 static void natsemi_check_duplex(struct eth_device *dev);
240 static int natsemi_send(struct eth_device *dev, volatile void *packet,
242 static int natsemi_poll(struct eth_device *dev);
243 static void natsemi_disable(struct eth_device *dev);
245 static struct pci_device_id supported[] = {
246 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815},
250 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
251 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
254 INW(struct eth_device *dev, u_long addr)
256 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
260 INL(struct eth_device *dev, u_long addr)
262 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
266 OUTW(struct eth_device *dev, int command, u_long addr)
268 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
272 OUTL(struct eth_device *dev, int command, u_long addr)
274 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
278 * Function: natsemi_initialize
280 * Description: Retrieves the MAC address of the card, and sets up some
281 * globals required by other routines, and initializes the NIC, making it
282 * ready to send and receive packets.
285 * leaves the natsemi initialized, and ready to receive packets.
287 * Returns: struct eth_device *: pointer to NIC data structure
291 natsemi_initialize(bd_t * bis)
295 struct eth_device *dev;
296 u32 iobase, status, chip_config;
302 /* Find PCI device(s) */
303 if ((devno = pci_find_devices(supported, idx++)) < 0) {
307 pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase);
308 iobase &= ~0x3; /* bit 1: unused and bit 0: I/O Space Indicator */
310 pci_write_config_dword(devno, PCI_COMMAND,
311 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
313 /* Check if I/O accesses and Bus Mastering are enabled. */
314 pci_read_config_dword(devno, PCI_COMMAND, &status);
315 if (!(status & PCI_COMMAND_MEMORY)) {
316 printf("Error: Can not enable MEM access.\n");
318 } else if (!(status & PCI_COMMAND_MASTER)) {
319 printf("Error: Can not enable Bus Mastering.\n");
323 dev = (struct eth_device *) malloc(sizeof *dev);
325 printf("natsemi: Can not allocate memory\n");
328 memset(dev, 0, sizeof(*dev));
330 sprintf(dev->name, "dp83815#%d", card_number);
331 dev->iobase = bus_to_phys(iobase);
333 printf("natsemi: NatSemi ns8381[56] @ %#x\n", dev->iobase);
335 dev->priv = (void *) devno;
336 dev->init = natsemi_init;
337 dev->halt = natsemi_disable;
338 dev->send = natsemi_send;
339 dev->recv = natsemi_poll;
345 /* Set the latency timer for value. */
346 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20);
350 /* natsemi has a non-standard PM control register
351 * in PCI config space. Some boards apparently need
352 * to be brought to D0 in this manner. */
353 pci_read_config_dword(devno, PCIPM, &tmp);
354 if (tmp & (0x03 | 0x100)) {
355 /* D0 state, disable PME assertion */
356 u32 newtmp = tmp & ~(0x03 | 0x100);
357 pci_write_config_dword(devno, PCIPM, newtmp);
360 printf("natsemi: EEPROM contents:\n");
361 for (i = 0; i <= EEPROM_SIZE; i++) {
362 short eedata = read_eeprom(dev, EECtrl, i);
363 printf(" %04hx", eedata);
367 /* get MAC address */
368 prev_eedata = read_eeprom(dev, EECtrl, 6);
369 for (i = 0; i < 3; i++) {
370 int eedata = read_eeprom(dev, EECtrl, i + 7);
371 dev->enetaddr[i*2] = (eedata << 1) + (prev_eedata >> 15);
372 dev->enetaddr[i*2+1] = eedata >> 7;
373 prev_eedata = eedata;
376 /* Reset the chip to erase any previous misconfiguration. */
377 OUTL(dev, ChipReset, ChipCmd);
379 advertising = mdio_read(dev, 1, 4);
380 chip_config = INL(dev, ChipConfig);
382 printf("%s: Transceiver status %#08X advertising %#08X\n",
383 dev->name, (int) INL(dev, BasicStatus), advertising);
384 printf("%s: Transceiver default autoneg. %s 10%s %s duplex.\n",
385 dev->name, chip_config & AnegMask ? "enabled, advertise" :
386 "disabled, force", chip_config & SpeedMask ? "0" : "",
387 chip_config & DuplexMask ? "full" : "half");
389 chip_config |= AnegEnBothBoth;
391 printf("%s: changed to autoneg. %s 10%s %s duplex.\n",
392 dev->name, chip_config & AnegMask ? "enabled, advertise" :
393 "disabled, force", chip_config & SpeedMask ? "0" : "",
394 chip_config & DuplexMask ? "full" : "half");
396 /*write new autoneg bits, reset phy*/
397 OUTL(dev, (chip_config | PhyRst), ChipConfig);
399 OUTL(dev, chip_config, ChipConfig);
402 * The PME bit is initialized from the EEPROM contents.
403 * PCI cards probably have PME disabled, but motherboard
404 * implementations may have PME set to enable WakeOnLan.
405 * With PME set the chip will scan incoming packets but
406 * nothing will be written to memory. */
407 SavedClkRun = INL(dev, ClkRun);
408 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
413 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
414 The EEPROM code is for common 93c06/46 EEPROMs w/ 6bit addresses. */
416 /* Delay between EEPROM clock transitions.
417 No extra delay is needed with 33MHz PCI, but future 66MHz
418 access may need a delay. */
419 #define eeprom_delay(ee_addr) INL(dev, ee_addr)
421 enum EEPROM_Ctrl_Bits {
424 EE_ChipSelect = 0x08,
428 #define EE_Write0 (EE_ChipSelect)
429 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
430 /* The EEPROM commands include the alway-set leading bit. */
432 EE_WrEnCmd = (4 << 6), EE_WriteCmd = (5 << 6),
433 EE_ReadCmd = (6 << 6), EE_EraseCmd = (7 << 6),
438 write_eeprom(struct eth_device *dev, long addr, int location, short value)
441 int ee_addr = (typeof(ee_addr))addr;
442 short wren_cmd = EE_WrEnCmd | 0x30; /*wren is 100 + 11XXXX*/
443 short write_cmd = location | EE_WriteCmd;
446 printf("write_eeprom: %08x, %04hx, %04hx\n",
447 dev->iobase + ee_addr, write_cmd, value);
449 /* Shift the write enable command bits out. */
450 for (i = 9; i >= 0; i--) {
451 short cmdval = (wren_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
452 OUTL(dev, cmdval, ee_addr);
453 eeprom_delay(ee_addr);
454 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
455 eeprom_delay(ee_addr);
458 OUTL(dev, 0, ee_addr); /*bring chip select low*/
459 OUTL(dev, EE_ShiftClk, ee_addr);
460 eeprom_delay(ee_addr);
462 /* Shift the write command bits out. */
463 for (i = 9; i >= 0; i--) {
464 short cmdval = (write_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
465 OUTL(dev, cmdval, ee_addr);
466 eeprom_delay(ee_addr);
467 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
468 eeprom_delay(ee_addr);
471 for (i = 0; i < 16; i++) {
472 short cmdval = (value & (1 << i)) ? EE_Write1 : EE_Write0;
473 OUTL(dev, cmdval, ee_addr);
474 eeprom_delay(ee_addr);
475 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
476 eeprom_delay(ee_addr);
479 OUTL(dev, 0, ee_addr); /*bring chip select low*/
480 OUTL(dev, EE_ShiftClk, ee_addr);
481 for (i = 0; i < 200000; i++) {
482 OUTL(dev, EE_Write0, ee_addr); /*poll for done*/
483 if (INL(dev, ee_addr) & EE_DataOut) {
487 eeprom_delay(ee_addr);
489 /* Terminate the EEPROM access. */
490 OUTL(dev, EE_Write0, ee_addr);
491 OUTL(dev, 0, ee_addr);
497 read_eeprom(struct eth_device *dev, long addr, int location)
501 int ee_addr = (typeof(ee_addr))addr;
502 int read_cmd = location | EE_ReadCmd;
504 OUTL(dev, EE_Write0, ee_addr);
506 /* Shift the read command bits out. */
507 for (i = 10; i >= 0; i--) {
508 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
509 OUTL(dev, dataval, ee_addr);
510 eeprom_delay(ee_addr);
511 OUTL(dev, dataval | EE_ShiftClk, ee_addr);
512 eeprom_delay(ee_addr);
514 OUTL(dev, EE_ChipSelect, ee_addr);
515 eeprom_delay(ee_addr);
517 for (i = 0; i < 16; i++) {
518 OUTL(dev, EE_ChipSelect | EE_ShiftClk, ee_addr);
519 eeprom_delay(ee_addr);
520 retval |= (INL(dev, ee_addr) & EE_DataOut) ? 1 << i : 0;
521 OUTL(dev, EE_ChipSelect, ee_addr);
522 eeprom_delay(ee_addr);
525 /* Terminate the EEPROM access. */
526 OUTL(dev, EE_Write0, ee_addr);
527 OUTL(dev, 0, ee_addr);
530 printf("read_eeprom: %08x, %08x, retval %08x\n",
531 dev->iobase + ee_addr, read_cmd, retval);
536 /* MII transceiver control section.
537 The 83815 series has an internal transceiver, and we present the
538 management registers as if they were MII connected. */
541 mdio_read(struct eth_device *dev, int phy_id, int location)
543 if (phy_id == 1 && location < 32)
544 return INL(dev, BasicControl+(location<<2))&0xffff;
549 /* Function: natsemi_init
551 * Description: resets the ethernet controller chip and configures
552 * registers and data structures required for sending and receiving packets.
554 * Arguments: struct eth_device *dev: NIC data structure
560 natsemi_init(struct eth_device *dev, bd_t * bis)
566 * The PME bit is initialized from the EEPROM contents.
567 * PCI cards probably have PME disabled, but motherboard
568 * implementations may have PME set to enable WakeOnLan.
569 * With PME set the chip will scan incoming packets but
570 * nothing will be written to memory. */
571 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
573 natsemi_init_rxfilter(dev);
574 natsemi_init_txd(dev);
575 natsemi_init_rxd(dev);
577 /* Configure the PCI bus bursts and FIFO thresholds. */
578 tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002);
579 rx_config = RxMxdma_256 | 0x20;
582 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
583 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
585 OUTL(dev, tx_config, TxConfig);
586 OUTL(dev, rx_config, RxConfig);
588 natsemi_check_duplex(dev);
589 natsemi_set_rx_mode(dev);
591 OUTL(dev, (RxOn | TxOn), ChipCmd);
596 * Function: natsemi_reset
598 * Description: soft resets the controller chip
600 * Arguments: struct eth_device *dev: NIC data structure
605 natsemi_reset(struct eth_device *dev)
607 OUTL(dev, ChipReset, ChipCmd);
609 /* On page 78 of the spec, they recommend some settings for "optimum
610 performance" to be done in sequence. These settings optimize some
611 of the 100Mbit autodetection circuitry. Also, we only want to do
612 this for rev C of the chip. */
613 if (INL(dev, SiliconRev) == 0x302) {
614 OUTW(dev, 0x0001, PGSEL);
615 OUTW(dev, 0x189C, PMDCSR);
616 OUTW(dev, 0x0000, TSTDAT);
617 OUTW(dev, 0x5040, DSPCFG);
618 OUTW(dev, 0x008C, SDCFG);
620 /* Disable interrupts using the mask. */
621 OUTL(dev, 0, IntrMask);
622 OUTL(dev, 0, IntrEnable);
625 /* Function: natsemi_init_rxfilter
627 * Description: sets receive filter address to our MAC address
629 * Arguments: struct eth_device *dev: NIC data structure
635 natsemi_init_rxfilter(struct eth_device *dev)
639 for (i = 0; i < ETH_ALEN; i += 2) {
640 OUTL(dev, i, RxFilterAddr);
641 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
647 * Function: natsemi_init_txd
649 * Description: initializes the Tx descriptor
651 * Arguments: struct eth_device *dev: NIC data structure
657 natsemi_init_txd(struct eth_device *dev)
660 txd.cmdsts = (u32) 0;
661 txd.bufptr = (u32) & txb[0];
663 /* load Transmit Descriptor Register */
664 OUTL(dev, (u32) & txd, TxRingPtr);
666 printf("natsemi_init_txd: TX descriptor reg loaded with: %#08X\n",
667 INL(dev, TxRingPtr));
671 /* Function: natsemi_init_rxd
673 * Description: initializes the Rx descriptor ring
675 * Arguments: struct eth_device *dev: NIC data structure
681 natsemi_init_rxd(struct eth_device *dev)
687 /* init RX descriptor */
688 for (i = 0; i < NUM_RX_DESC; i++) {
691 NUM_RX_DESC) ? (u32) & rxd[i +
694 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
695 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
698 ("natsemi_init_rxd: rxd[%d]=%p link=%X cmdsts=%lX bufptr=%X\n",
699 i, &rxd[i], le32_to_cpu(rxd[i].link),
700 rxd[i].cmdsts, rxd[i].bufptr);
704 /* load Receive Descriptor Register */
705 OUTL(dev, (u32) & rxd[0], RxRingPtr);
708 printf("natsemi_init_rxd: RX descriptor register loaded with: %X\n",
709 INL(dev, RxRingPtr));
713 /* Function: natsemi_set_rx_mode
716 * sets the receive mode to accept all broadcast packets and packets
717 * with our MAC address, and reject all multicast packets.
719 * Arguments: struct eth_device *dev: NIC data structure
725 natsemi_set_rx_mode(struct eth_device *dev)
727 u32 rx_mode = AcceptBroadcast | AcceptMyPhys;
729 OUTL(dev, rx_mode, RxFilterAddr);
733 natsemi_check_duplex(struct eth_device *dev)
735 int duplex = INL(dev, ChipConfig) & FullDuplex ? 1 : 0;
738 printf("%s: Setting %s-duplex based on negotiated link"
739 " capability.\n", dev->name, duplex ? "full" : "half");
742 rx_config |= RxAcceptTx;
743 tx_config |= (TxCarrierIgn | TxHeartIgn);
745 rx_config &= ~RxAcceptTx;
746 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
748 OUTL(dev, tx_config, TxConfig);
749 OUTL(dev, rx_config, RxConfig);
752 /* Function: natsemi_send
754 * Description: transmits a packet and waits for completion or timeout.
758 natsemi_send(struct eth_device *dev, volatile void *packet, int length)
762 u32 *tx_ptr = &tx_status;
763 vu_long *res = (vu_long *)tx_ptr;
765 /* Stop the transmitter */
766 OUTL(dev, TxOff, ChipCmd);
770 printf("natsemi_send: sending %d bytes\n", (int) length);
773 /* set the transmit buffer descriptor and enable Transmit State Machine */
774 txd.link = cpu_to_le32(0);
775 txd.bufptr = cpu_to_le32(phys_to_bus((u32) packet));
776 txd.cmdsts = cpu_to_le32(DescOwn | length);
778 /* load Transmit Descriptor Register */
779 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
782 printf("natsemi_send: TX descriptor register loaded with: %#08X\n",
783 INL(dev, TxRingPtr));
785 /* restart the transmitter */
786 OUTL(dev, TxOn, ChipCmd);
789 (*res = le32_to_cpu(txd.cmdsts)) & DescOwn;
791 if (i >= TOUT_LOOP) {
793 ("%s: tx error buffer not ready: txd.cmdsts == %#X\n",
794 dev->name, tx_status);
799 if (!(tx_status & DescPktOK)) {
800 printf("natsemi_send: Transmit error, Tx status %X.\n",
810 /* Function: natsemi_poll
812 * Description: checks for a received packet and returns it if found.
814 * Arguments: struct eth_device *dev: NIC data structure
816 * Returns: 1 if packet was received.
817 * 0 if no packet was received.
820 * Returns (copies) the packet to the array dev->packet.
821 * Returns the length of the packet.
825 natsemi_poll(struct eth_device *dev)
829 u32 rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
831 if (!(rx_status & (u32) DescOwn))
835 printf("natsemi_poll: got a packet: cur_rx:%d, status:%X\n",
838 length = (rx_status & DSIZE) - CRC_SIZE;
840 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
842 ("natsemi_poll: Corrupted packet received, buffer status = %X\n",
845 } else { /* give packet to higher level routine */
846 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
850 /* return the descriptor and buffer to receive ring */
851 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
852 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
854 if (++cur_rx == NUM_RX_DESC)
857 /* re-enable the potentially idle receive state machine */
858 OUTL(dev, RxOn, ChipCmd);
863 /* Function: natsemi_disable
865 * Description: Turns off interrupts and stops Tx and Rx engines
867 * Arguments: struct eth_device *dev: NIC data structure
873 natsemi_disable(struct eth_device *dev)
875 /* Disable interrupts using the mask. */
876 OUTL(dev, 0, IntrMask);
877 OUTL(dev, 0, IntrEnable);
879 /* Stop the chip's Tx and Rx processes. */
880 OUTL(dev, RxOff | TxOff, ChipCmd);
882 /* Restore PME enable bit */
883 OUTL(dev, SavedClkRun, ClkRun);