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
59 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
60 defined(CONFIG_NATSEMI)
63 #define EEPROM_SIZE 0xb /*12 16-bit chunks, or 24 bytes*/
65 #define DSIZE 0x00000FFF
68 #define TOUT_LOOP 500000
69 #define TX_BUF_SIZE 1536
70 #define RX_BUF_SIZE 1536
71 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */
73 /* Offsets to the device registers.
74 Unlike software-only systems, device drivers interact with complex hardware.
75 It's not useful to define symbolic names for every register bit in the
77 enum register_offsets {
94 /* These are from the spec, around page 78... on a separate table. */
102 /* Bit in ChipCmd. */
113 enum ChipConfigBits {
114 LinkSts = 0x80000000,
115 HundSpeed = 0x40000000,
116 FullDuplex = 0x20000000,
117 TenPolarity = 0x10000000,
118 AnegDone = 0x08000000,
119 AnegEnBothBoth = 0x0000E000,
120 AnegDis100Full = 0x0000C000,
121 AnegEn100Both = 0x0000A000,
122 AnegDis100Half = 0x00008000,
123 AnegEnBothHalf = 0x00006000,
124 AnegDis10Full = 0x00004000,
125 AnegEn10Both = 0x00002000,
126 DuplexMask = 0x00008000,
127 SpeedMask = 0x00004000,
128 AnegMask = 0x00002000,
129 AnegDis10Half = 0x00000000,
133 BootRomDisable = 0x00000004,
140 TxMxdmaMask = 0x700000,
142 TxMxdma_4 = 0x100000,
143 TxMxdma_8 = 0x200000,
144 TxMxdma_16 = 0x300000,
145 TxMxdma_32 = 0x400000,
146 TxMxdma_64 = 0x500000,
147 TxMxdma_128 = 0x600000,
148 TxMxdma_256 = 0x700000,
149 TxCollRetry = 0x800000,
150 TxAutoPad = 0x10000000,
151 TxMacLoop = 0x20000000,
152 TxHeartIgn = 0x40000000,
153 TxCarrierIgn = 0x80000000
158 RxMxdmaMask = 0x700000,
160 RxMxdma_4 = 0x100000,
161 RxMxdma_8 = 0x200000,
162 RxMxdma_16 = 0x300000,
163 RxMxdma_32 = 0x400000,
164 RxMxdma_64 = 0x500000,
165 RxMxdma_128 = 0x600000,
166 RxMxdma_256 = 0x700000,
167 RxAcceptLong = 0x8000000,
168 RxAcceptTx = 0x10000000,
169 RxAcceptRunt = 0x40000000,
170 RxAcceptErr = 0x80000000
173 /* Bits in the RxMode register. */
177 AcceptBroadcast = 0xC0000000,
178 AcceptMulticast = 0x00200000,
179 AcceptAllMulticast = 0x20000000,
180 AcceptAllPhys = 0x10000000,
181 AcceptMyPhys = 0x08000000
184 typedef struct _BufferDesc {
191 /* Bits in network_desc.status */
192 enum desc_status_bits {
193 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000,
194 DescNoCRC = 0x10000000, DescPktOK = 0x08000000,
195 DescSizeMask = 0xfff,
197 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
198 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
199 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
200 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
202 DescRxAbort = 0x04000000, DescRxOver = 0x02000000,
203 DescRxDest = 0x01800000, DescRxLong = 0x00400000,
204 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000,
205 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000,
206 DescRxLoop = 0x00020000, DesRxColl = 0x00010000,
211 static int natsemi_debug = 0; /* 1 verbose debugging, 0 normal */
213 static u32 SavedClkRun;
214 static unsigned int cur_rx;
215 static unsigned int advertising;
216 static unsigned int rx_config;
217 static unsigned int tx_config;
219 /* Note: transmit and receive buffers and descriptors must be
221 static BufferDesc txd __attribute__ ((aligned(4)));
222 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(4)));
224 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(4)));
225 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE]
226 __attribute__ ((aligned(4)));
228 /* Function Prototypes */
230 static void write_eeprom(struct eth_device *dev, long addr, int location,
233 static int read_eeprom(struct eth_device *dev, long addr, int location);
234 static int mdio_read(struct eth_device *dev, int phy_id, int location);
235 static int natsemi_init(struct eth_device *dev, bd_t * bis);
236 static void natsemi_reset(struct eth_device *dev);
237 static void natsemi_init_rxfilter(struct eth_device *dev);
238 static void natsemi_init_txd(struct eth_device *dev);
239 static void natsemi_init_rxd(struct eth_device *dev);
240 static void natsemi_set_rx_mode(struct eth_device *dev);
241 static void natsemi_check_duplex(struct eth_device *dev);
242 static int natsemi_send(struct eth_device *dev, volatile void *packet,
244 static int natsemi_poll(struct eth_device *dev);
245 static void natsemi_disable(struct eth_device *dev);
247 static struct pci_device_id supported[] = {
248 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815},
252 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
253 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
256 INW(struct eth_device *dev, u_long addr)
258 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
262 INL(struct eth_device *dev, u_long addr)
264 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
268 OUTW(struct eth_device *dev, int command, u_long addr)
270 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
274 OUTL(struct eth_device *dev, int command, u_long addr)
276 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
280 * Function: natsemi_initialize
282 * Description: Retrieves the MAC address of the card, and sets up some
283 * globals required by other routines, and initializes the NIC, making it
284 * ready to send and receive packets.
287 * leaves the natsemi initialized, and ready to recieve packets.
289 * Returns: struct eth_device *: pointer to NIC data structure
293 natsemi_initialize(bd_t * bis)
297 struct eth_device *dev;
298 u32 iobase, status, chip_config;
304 /* Find PCI device(s) */
305 if ((devno = pci_find_devices(supported, idx++)) < 0) {
309 pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase);
310 iobase &= ~0x3; /* bit 1: unused and bit 0: I/O Space Indicator */
312 pci_write_config_dword(devno, PCI_COMMAND,
313 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
315 /* Check if I/O accesses and Bus Mastering are enabled. */
316 pci_read_config_dword(devno, PCI_COMMAND, &status);
317 if (!(status & PCI_COMMAND_MEMORY)) {
318 printf("Error: Can not enable MEM access.\n");
320 } else if (!(status & PCI_COMMAND_MASTER)) {
321 printf("Error: Can not enable Bus Mastering.\n");
325 dev = (struct eth_device *) malloc(sizeof *dev);
327 sprintf(dev->name, "dp83815#%d", card_number);
328 dev->iobase = bus_to_phys(iobase);
330 printf("natsemi: NatSemi ns8381[56] @ %#x\n", dev->iobase);
332 dev->priv = (void *) devno;
333 dev->init = natsemi_init;
334 dev->halt = natsemi_disable;
335 dev->send = natsemi_send;
336 dev->recv = natsemi_poll;
342 /* Set the latency timer for value. */
343 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20);
347 /* natsemi has a non-standard PM control register
348 * in PCI config space. Some boards apparently need
349 * to be brought to D0 in this manner. */
350 pci_read_config_dword(devno, PCIPM, &tmp);
351 if (tmp & (0x03 | 0x100)) {
352 /* D0 state, disable PME assertion */
353 u32 newtmp = tmp & ~(0x03 | 0x100);
354 pci_write_config_dword(devno, PCIPM, newtmp);
357 printf("natsemi: EEPROM contents:\n");
358 for (i = 0; i <= EEPROM_SIZE; i++) {
359 short eedata = read_eeprom(dev, EECtrl, i);
360 printf(" %04hx", eedata);
364 /* get MAC address */
365 prev_eedata = read_eeprom(dev, EECtrl, 6);
366 for (i = 0; i < 3; i++) {
367 int eedata = read_eeprom(dev, EECtrl, i + 7);
368 dev->enetaddr[i*2] = (eedata << 1) + (prev_eedata >> 15);
369 dev->enetaddr[i*2+1] = eedata >> 7;
370 prev_eedata = eedata;
373 /* Reset the chip to erase any previous misconfiguration. */
374 OUTL(dev, ChipReset, ChipCmd);
376 advertising = mdio_read(dev, 1, 4);
377 chip_config = INL(dev, ChipConfig);
379 printf("%s: Transceiver status %#08X advertising %#08X\n",
380 dev->name, (int) INL(dev, BasicStatus), advertising);
381 printf("%s: Transceiver default autoneg. %s 10%s %s duplex.\n",
382 dev->name, chip_config & AnegMask ? "enabled, advertise" :
383 "disabled, force", chip_config & SpeedMask ? "0" : "",
384 chip_config & DuplexMask ? "full" : "half");
386 chip_config |= AnegEnBothBoth;
388 printf("%s: changed to autoneg. %s 10%s %s duplex.\n",
389 dev->name, chip_config & AnegMask ? "enabled, advertise" :
390 "disabled, force", chip_config & SpeedMask ? "0" : "",
391 chip_config & DuplexMask ? "full" : "half");
393 /*write new autoneg bits, reset phy*/
394 OUTL(dev, (chip_config | PhyRst), ChipConfig);
396 OUTL(dev, chip_config, ChipConfig);
399 * The PME bit is initialized from the EEPROM contents.
400 * PCI cards probably have PME disabled, but motherboard
401 * implementations may have PME set to enable WakeOnLan.
402 * With PME set the chip will scan incoming packets but
403 * nothing will be written to memory. */
404 SavedClkRun = INL(dev, ClkRun);
405 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
410 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
411 The EEPROM code is for common 93c06/46 EEPROMs w/ 6bit addresses. */
413 /* Delay between EEPROM clock transitions.
414 No extra delay is needed with 33Mhz PCI, but future 66Mhz
415 access may need a delay. */
416 #define eeprom_delay(ee_addr) INL(dev, ee_addr)
418 enum EEPROM_Ctrl_Bits {
421 EE_ChipSelect = 0x08,
425 #define EE_Write0 (EE_ChipSelect)
426 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
427 /* The EEPROM commands include the alway-set leading bit. */
429 EE_WrEnCmd = (4 << 6), EE_WriteCmd = (5 << 6),
430 EE_ReadCmd = (6 << 6), EE_EraseCmd = (7 << 6),
435 write_eeprom(struct eth_device *dev, long addr, int location, short value)
438 int ee_addr = (typeof(ee_addr))addr;
439 short wren_cmd = EE_WrEnCmd | 0x30; /*wren is 100 + 11XXXX*/
440 short write_cmd = location | EE_WriteCmd;
443 printf("write_eeprom: %08x, %04hx, %04hx\n",
444 dev->iobase + ee_addr, write_cmd, value);
446 /* Shift the write enable command bits out. */
447 for (i = 9; i >= 0; i--) {
448 short cmdval = (wren_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
449 OUTL(dev, cmdval, ee_addr);
450 eeprom_delay(ee_addr);
451 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
452 eeprom_delay(ee_addr);
455 OUTL(dev, 0, ee_addr); /*bring chip select low*/
456 OUTL(dev, EE_ShiftClk, ee_addr);
457 eeprom_delay(ee_addr);
459 /* Shift the write command bits out. */
460 for (i = 9; i >= 0; i--) {
461 short cmdval = (write_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
462 OUTL(dev, cmdval, ee_addr);
463 eeprom_delay(ee_addr);
464 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
465 eeprom_delay(ee_addr);
468 for (i = 0; i < 16; i++) {
469 short cmdval = (value & (1 << i)) ? EE_Write1 : EE_Write0;
470 OUTL(dev, cmdval, ee_addr);
471 eeprom_delay(ee_addr);
472 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
473 eeprom_delay(ee_addr);
476 OUTL(dev, 0, ee_addr); /*bring chip select low*/
477 OUTL(dev, EE_ShiftClk, ee_addr);
478 for (i = 0; i < 200000; i++) {
479 OUTL(dev, EE_Write0, ee_addr); /*poll for done*/
480 if (INL(dev, ee_addr) & EE_DataOut) {
484 eeprom_delay(ee_addr);
486 /* Terminate the EEPROM access. */
487 OUTL(dev, EE_Write0, ee_addr);
488 OUTL(dev, 0, ee_addr);
494 read_eeprom(struct eth_device *dev, long addr, int location)
498 int ee_addr = (typeof(ee_addr))addr;
499 int read_cmd = location | EE_ReadCmd;
501 OUTL(dev, EE_Write0, ee_addr);
503 /* Shift the read command bits out. */
504 for (i = 10; i >= 0; i--) {
505 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
506 OUTL(dev, dataval, ee_addr);
507 eeprom_delay(ee_addr);
508 OUTL(dev, dataval | EE_ShiftClk, ee_addr);
509 eeprom_delay(ee_addr);
511 OUTL(dev, EE_ChipSelect, ee_addr);
512 eeprom_delay(ee_addr);
514 for (i = 0; i < 16; i++) {
515 OUTL(dev, EE_ChipSelect | EE_ShiftClk, ee_addr);
516 eeprom_delay(ee_addr);
517 retval |= (INL(dev, ee_addr) & EE_DataOut) ? 1 << i : 0;
518 OUTL(dev, EE_ChipSelect, ee_addr);
519 eeprom_delay(ee_addr);
522 /* Terminate the EEPROM access. */
523 OUTL(dev, EE_Write0, ee_addr);
524 OUTL(dev, 0, ee_addr);
527 printf("read_eeprom: %08x, %08x, retval %08x\n",
528 dev->iobase + ee_addr, read_cmd, retval);
533 /* MII transceiver control section.
534 The 83815 series has an internal transceiver, and we present the
535 management registers as if they were MII connected. */
538 mdio_read(struct eth_device *dev, int phy_id, int location)
540 if (phy_id == 1 && location < 32)
541 return INL(dev, BasicControl+(location<<2))&0xffff;
546 /* Function: natsemi_init
548 * Description: resets the ethernet controller chip and configures
549 * registers and data structures required for sending and receiving packets.
551 * Arguments: struct eth_device *dev: NIC data structure
557 natsemi_init(struct eth_device *dev, bd_t * bis)
563 * The PME bit is initialized from the EEPROM contents.
564 * PCI cards probably have PME disabled, but motherboard
565 * implementations may have PME set to enable WakeOnLan.
566 * With PME set the chip will scan incoming packets but
567 * nothing will be written to memory. */
568 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
570 natsemi_init_rxfilter(dev);
571 natsemi_init_txd(dev);
572 natsemi_init_rxd(dev);
574 /* Configure the PCI bus bursts and FIFO thresholds. */
575 tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002);
576 rx_config = RxMxdma_256 | 0x20;
579 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
580 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
582 OUTL(dev, tx_config, TxConfig);
583 OUTL(dev, rx_config, RxConfig);
585 natsemi_check_duplex(dev);
586 natsemi_set_rx_mode(dev);
588 OUTL(dev, (RxOn | TxOn), ChipCmd);
593 * Function: natsemi_reset
595 * Description: soft resets the controller chip
597 * Arguments: struct eth_device *dev: NIC data structure
602 natsemi_reset(struct eth_device *dev)
604 OUTL(dev, ChipReset, ChipCmd);
606 /* On page 78 of the spec, they recommend some settings for "optimum
607 performance" to be done in sequence. These settings optimize some
608 of the 100Mbit autodetection circuitry. Also, we only want to do
609 this for rev C of the chip. */
610 if (INL(dev, SiliconRev) == 0x302) {
611 OUTW(dev, 0x0001, PGSEL);
612 OUTW(dev, 0x189C, PMDCSR);
613 OUTW(dev, 0x0000, TSTDAT);
614 OUTW(dev, 0x5040, DSPCFG);
615 OUTW(dev, 0x008C, SDCFG);
617 /* Disable interrupts using the mask. */
618 OUTL(dev, 0, IntrMask);
619 OUTL(dev, 0, IntrEnable);
622 /* Function: natsemi_init_rxfilter
624 * Description: sets receive filter address to our MAC address
626 * Arguments: struct eth_device *dev: NIC data structure
632 natsemi_init_rxfilter(struct eth_device *dev)
636 for (i = 0; i < ETH_ALEN; i += 2) {
637 OUTL(dev, i, RxFilterAddr);
638 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
644 * Function: natsemi_init_txd
646 * Description: initializes the Tx descriptor
648 * Arguments: struct eth_device *dev: NIC data structure
654 natsemi_init_txd(struct eth_device *dev)
657 txd.cmdsts = (u32) 0;
658 txd.bufptr = (u32) & txb[0];
660 /* load Transmit Descriptor Register */
661 OUTL(dev, (u32) & txd, TxRingPtr);
663 printf("natsemi_init_txd: TX descriptor reg loaded with: %#08X\n",
664 INL(dev, TxRingPtr));
668 /* Function: natsemi_init_rxd
670 * Description: initializes the Rx descriptor ring
672 * Arguments: struct eth_device *dev: NIC data structure
678 natsemi_init_rxd(struct eth_device *dev)
684 /* init RX descriptor */
685 for (i = 0; i < NUM_RX_DESC; i++) {
688 NUM_RX_DESC) ? (u32) & rxd[i +
691 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
692 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
695 ("natsemi_init_rxd: rxd[%d]=%p link=%X cmdsts=%lX bufptr=%X\n",
696 i, &rxd[i], le32_to_cpu(rxd[i].link),
697 rxd[i].cmdsts, rxd[i].bufptr);
701 /* load Receive Descriptor Register */
702 OUTL(dev, (u32) & rxd[0], RxRingPtr);
705 printf("natsemi_init_rxd: RX descriptor register loaded with: %X\n",
706 INL(dev, RxRingPtr));
710 /* Function: natsemi_set_rx_mode
713 * sets the receive mode to accept all broadcast packets and packets
714 * with our MAC address, and reject all multicast packets.
716 * Arguments: struct eth_device *dev: NIC data structure
722 natsemi_set_rx_mode(struct eth_device *dev)
724 u32 rx_mode = AcceptBroadcast | AcceptMyPhys;
726 OUTL(dev, rx_mode, RxFilterAddr);
730 natsemi_check_duplex(struct eth_device *dev)
732 int duplex = INL(dev, ChipConfig) & FullDuplex ? 1 : 0;
735 printf("%s: Setting %s-duplex based on negotiated link"
736 " capability.\n", dev->name, duplex ? "full" : "half");
739 rx_config |= RxAcceptTx;
740 tx_config |= (TxCarrierIgn | TxHeartIgn);
742 rx_config &= ~RxAcceptTx;
743 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
745 OUTL(dev, tx_config, TxConfig);
746 OUTL(dev, rx_config, RxConfig);
749 /* Function: natsemi_send
751 * Description: transmits a packet and waits for completion or timeout.
755 natsemi_send(struct eth_device *dev, volatile void *packet, int length)
759 vu_long *res = (vu_long *)&tx_status;
761 /* Stop the transmitter */
762 OUTL(dev, TxOff, ChipCmd);
766 printf("natsemi_send: sending %d bytes\n", (int) length);
769 /* set the transmit buffer descriptor and enable Transmit State Machine */
770 txd.link = cpu_to_le32(0);
771 txd.bufptr = cpu_to_le32(phys_to_bus((u32) packet));
772 txd.cmdsts = cpu_to_le32(DescOwn | length);
774 /* load Transmit Descriptor Register */
775 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
778 printf("natsemi_send: TX descriptor register loaded with: %#08X\n",
779 INL(dev, TxRingPtr));
781 /* restart the transmitter */
782 OUTL(dev, TxOn, ChipCmd);
785 (*res = le32_to_cpu(txd.cmdsts)) & DescOwn;
787 if (i >= TOUT_LOOP) {
789 ("%s: tx error buffer not ready: txd.cmdsts == %#X\n",
790 dev->name, tx_status);
795 if (!(tx_status & DescPktOK)) {
796 printf("natsemi_send: Transmit error, Tx status %X.\n",
806 /* Function: natsemi_poll
808 * Description: checks for a received packet and returns it if found.
810 * Arguments: struct eth_device *dev: NIC data structure
812 * Returns: 1 if packet was received.
813 * 0 if no packet was received.
816 * Returns (copies) the packet to the array dev->packet.
817 * Returns the length of the packet.
821 natsemi_poll(struct eth_device *dev)
825 u32 rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
827 if (!(rx_status & (u32) DescOwn))
831 printf("natsemi_poll: got a packet: cur_rx:%d, status:%X\n",
834 length = (rx_status & DSIZE) - CRC_SIZE;
836 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
838 ("natsemi_poll: Corrupted packet received, buffer status = %X\n",
841 } else { /* give packet to higher level routine */
842 NetReceive((rxb + cur_rx * RX_BUF_SIZE), length);
846 /* return the descriptor and buffer to receive ring */
847 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
848 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
850 if (++cur_rx == NUM_RX_DESC)
853 /* re-enable the potentially idle receive state machine */
854 OUTL(dev, RxOn, ChipCmd);
859 /* Function: natsemi_disable
861 * Description: Turns off interrupts and stops Tx and Rx engines
863 * Arguments: struct eth_device *dev: NIC data structure
869 natsemi_disable(struct eth_device *dev)
871 /* Disable interrupts using the mask. */
872 OUTL(dev, 0, IntrMask);
873 OUTL(dev, 0, IntrEnable);
875 /* Stop the chip's Tx and Rx processes. */
876 OUTL(dev, RxOff | TxOff, ChipCmd);
878 /* Restore PME enable bit */
879 OUTL(dev, SavedClkRun, ClkRun);