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
65 #define TOUT_LOOP 500000
66 #define TX_BUF_SIZE 1536
67 #define RX_BUF_SIZE 1536
68 #define NUM_RX_DESC 4 /* Number of Rx descriptor registers. */
70 /* Offsets to the device registers.
71 Unlike software-only systems, device drivers interact with complex hardware.
72 It's not useful to define symbolic names for every register bit in the
74 enum register_offsets {
91 /* These are from the spec, around page 78... on a separate table. */
110 enum ChipConfigBits {
111 LinkSts = 0x80000000,
112 HundSpeed = 0x40000000,
113 FullDuplex = 0x20000000,
114 TenPolarity = 0x10000000,
115 AnegDone = 0x08000000,
116 AnegEnBothBoth = 0x0000E000,
117 AnegDis100Full = 0x0000C000,
118 AnegEn100Both = 0x0000A000,
119 AnegDis100Half = 0x00008000,
120 AnegEnBothHalf = 0x00006000,
121 AnegDis10Full = 0x00004000,
122 AnegEn10Both = 0x00002000,
123 DuplexMask = 0x00008000,
124 SpeedMask = 0x00004000,
125 AnegMask = 0x00002000,
126 AnegDis10Half = 0x00000000,
130 BootRomDisable = 0x00000004,
137 TxMxdmaMask = 0x700000,
139 TxMxdma_4 = 0x100000,
140 TxMxdma_8 = 0x200000,
141 TxMxdma_16 = 0x300000,
142 TxMxdma_32 = 0x400000,
143 TxMxdma_64 = 0x500000,
144 TxMxdma_128 = 0x600000,
145 TxMxdma_256 = 0x700000,
146 TxCollRetry = 0x800000,
147 TxAutoPad = 0x10000000,
148 TxMacLoop = 0x20000000,
149 TxHeartIgn = 0x40000000,
150 TxCarrierIgn = 0x80000000
155 RxMxdmaMask = 0x700000,
157 RxMxdma_4 = 0x100000,
158 RxMxdma_8 = 0x200000,
159 RxMxdma_16 = 0x300000,
160 RxMxdma_32 = 0x400000,
161 RxMxdma_64 = 0x500000,
162 RxMxdma_128 = 0x600000,
163 RxMxdma_256 = 0x700000,
164 RxAcceptLong = 0x8000000,
165 RxAcceptTx = 0x10000000,
166 RxAcceptRunt = 0x40000000,
167 RxAcceptErr = 0x80000000
170 /* Bits in the RxMode register. */
174 AcceptBroadcast = 0xC0000000,
175 AcceptMulticast = 0x00200000,
176 AcceptAllMulticast = 0x20000000,
177 AcceptAllPhys = 0x10000000,
178 AcceptMyPhys = 0x08000000
181 typedef struct _BufferDesc {
188 /* Bits in network_desc.status */
189 enum desc_status_bits {
190 DescOwn = 0x80000000, DescMore = 0x40000000, DescIntr = 0x20000000,
191 DescNoCRC = 0x10000000, DescPktOK = 0x08000000,
192 DescSizeMask = 0xfff,
194 DescTxAbort = 0x04000000, DescTxFIFO = 0x02000000,
195 DescTxCarrier = 0x01000000, DescTxDefer = 0x00800000,
196 DescTxExcDefer = 0x00400000, DescTxOOWCol = 0x00200000,
197 DescTxExcColl = 0x00100000, DescTxCollCount = 0x000f0000,
199 DescRxAbort = 0x04000000, DescRxOver = 0x02000000,
200 DescRxDest = 0x01800000, DescRxLong = 0x00400000,
201 DescRxRunt = 0x00200000, DescRxInvalid = 0x00100000,
202 DescRxCRC = 0x00080000, DescRxAlign = 0x00040000,
203 DescRxLoop = 0x00020000, DesRxColl = 0x00010000,
208 static int natsemi_debug = 0; /* 1 verbose debugging, 0 normal */
210 static u32 SavedClkRun;
211 static unsigned int cur_rx;
212 static unsigned int advertising;
213 static unsigned int rx_config;
214 static unsigned int tx_config;
216 /* Note: transmit and receive buffers and descriptors must be
218 static BufferDesc txd __attribute__ ((aligned(4)));
219 static BufferDesc rxd[NUM_RX_DESC] __attribute__ ((aligned(4)));
221 static unsigned char txb[TX_BUF_SIZE] __attribute__ ((aligned(4)));
222 static unsigned char rxb[NUM_RX_DESC * RX_BUF_SIZE]
223 __attribute__ ((aligned(4)));
225 /* Function Prototypes */
227 static void write_eeprom(struct eth_device *dev, long addr, int location,
230 static int read_eeprom(struct eth_device *dev, long addr, int location);
231 static int mdio_read(struct eth_device *dev, int phy_id, int location);
232 static int natsemi_init(struct eth_device *dev, bd_t * bis);
233 static void natsemi_reset(struct eth_device *dev);
234 static void natsemi_init_rxfilter(struct eth_device *dev);
235 static void natsemi_init_txd(struct eth_device *dev);
236 static void natsemi_init_rxd(struct eth_device *dev);
237 static void natsemi_set_rx_mode(struct eth_device *dev);
238 static void natsemi_check_duplex(struct eth_device *dev);
239 static int natsemi_send(struct eth_device *dev, void *packet, int length);
240 static int natsemi_poll(struct eth_device *dev);
241 static void natsemi_disable(struct eth_device *dev);
243 static struct pci_device_id supported[] = {
244 {PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815},
248 #define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a)
249 #define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a)
252 INW(struct eth_device *dev, u_long addr)
254 return le16_to_cpu(*(vu_short *) (addr + dev->iobase));
258 INL(struct eth_device *dev, u_long addr)
260 return le32_to_cpu(*(vu_long *) (addr + dev->iobase));
264 OUTW(struct eth_device *dev, int command, u_long addr)
266 *(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);
270 OUTL(struct eth_device *dev, int command, u_long addr)
272 *(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);
276 * Function: natsemi_initialize
278 * Description: Retrieves the MAC address of the card, and sets up some
279 * globals required by other routines, and initializes the NIC, making it
280 * ready to send and receive packets.
283 * leaves the natsemi initialized, and ready to receive packets.
285 * Returns: struct eth_device *: pointer to NIC data structure
289 natsemi_initialize(bd_t * bis)
293 struct eth_device *dev;
294 u32 iobase, status, chip_config;
300 /* Find PCI device(s) */
301 if ((devno = pci_find_devices(supported, idx++)) < 0) {
305 pci_read_config_dword(devno, PCI_BASE_ADDRESS_0, &iobase);
306 iobase &= ~0x3; /* bit 1: unused and bit 0: I/O Space Indicator */
308 pci_write_config_dword(devno, PCI_COMMAND,
309 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
311 /* Check if I/O accesses and Bus Mastering are enabled. */
312 pci_read_config_dword(devno, PCI_COMMAND, &status);
313 if (!(status & PCI_COMMAND_MEMORY)) {
314 printf("Error: Can not enable MEM access.\n");
316 } else if (!(status & PCI_COMMAND_MASTER)) {
317 printf("Error: Can not enable Bus Mastering.\n");
321 dev = (struct eth_device *) malloc(sizeof *dev);
323 printf("natsemi: Can not allocate memory\n");
326 memset(dev, 0, sizeof(*dev));
328 sprintf(dev->name, "dp83815#%d", card_number);
329 dev->iobase = bus_to_phys(iobase);
331 printf("natsemi: NatSemi ns8381[56] @ %#x\n", dev->iobase);
333 dev->priv = (void *) devno;
334 dev->init = natsemi_init;
335 dev->halt = natsemi_disable;
336 dev->send = natsemi_send;
337 dev->recv = natsemi_poll;
343 /* Set the latency timer for value. */
344 pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20);
348 /* natsemi has a non-standard PM control register
349 * in PCI config space. Some boards apparently need
350 * to be brought to D0 in this manner. */
351 pci_read_config_dword(devno, PCIPM, &tmp);
352 if (tmp & (0x03 | 0x100)) {
353 /* D0 state, disable PME assertion */
354 u32 newtmp = tmp & ~(0x03 | 0x100);
355 pci_write_config_dword(devno, PCIPM, newtmp);
358 printf("natsemi: EEPROM contents:\n");
359 for (i = 0; i <= EEPROM_SIZE; i++) {
360 short eedata = read_eeprom(dev, EECtrl, i);
361 printf(" %04hx", eedata);
365 /* get MAC address */
366 prev_eedata = read_eeprom(dev, EECtrl, 6);
367 for (i = 0; i < 3; i++) {
368 int eedata = read_eeprom(dev, EECtrl, i + 7);
369 dev->enetaddr[i*2] = (eedata << 1) + (prev_eedata >> 15);
370 dev->enetaddr[i*2+1] = eedata >> 7;
371 prev_eedata = eedata;
374 /* Reset the chip to erase any previous misconfiguration. */
375 OUTL(dev, ChipReset, ChipCmd);
377 advertising = mdio_read(dev, 1, 4);
378 chip_config = INL(dev, ChipConfig);
380 printf("%s: Transceiver status %#08X advertising %#08X\n",
381 dev->name, (int) INL(dev, BasicStatus), advertising);
382 printf("%s: Transceiver default autoneg. %s 10%s %s duplex.\n",
383 dev->name, chip_config & AnegMask ? "enabled, advertise" :
384 "disabled, force", chip_config & SpeedMask ? "0" : "",
385 chip_config & DuplexMask ? "full" : "half");
387 chip_config |= AnegEnBothBoth;
389 printf("%s: changed to autoneg. %s 10%s %s duplex.\n",
390 dev->name, chip_config & AnegMask ? "enabled, advertise" :
391 "disabled, force", chip_config & SpeedMask ? "0" : "",
392 chip_config & DuplexMask ? "full" : "half");
394 /*write new autoneg bits, reset phy*/
395 OUTL(dev, (chip_config | PhyRst), ChipConfig);
397 OUTL(dev, chip_config, ChipConfig);
400 * The PME bit is initialized from the EEPROM contents.
401 * PCI cards probably have PME disabled, but motherboard
402 * implementations may have PME set to enable WakeOnLan.
403 * With PME set the chip will scan incoming packets but
404 * nothing will be written to memory. */
405 SavedClkRun = INL(dev, ClkRun);
406 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
411 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
412 The EEPROM code is for common 93c06/46 EEPROMs w/ 6bit addresses. */
414 /* Delay between EEPROM clock transitions.
415 No extra delay is needed with 33MHz PCI, but future 66MHz
416 access may need a delay. */
417 #define eeprom_delay(ee_addr) INL(dev, ee_addr)
419 enum EEPROM_Ctrl_Bits {
422 EE_ChipSelect = 0x08,
426 #define EE_Write0 (EE_ChipSelect)
427 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
428 /* The EEPROM commands include the alway-set leading bit. */
430 EE_WrEnCmd = (4 << 6), EE_WriteCmd = (5 << 6),
431 EE_ReadCmd = (6 << 6), EE_EraseCmd = (7 << 6),
436 write_eeprom(struct eth_device *dev, long addr, int location, short value)
439 int ee_addr = (typeof(ee_addr))addr;
440 short wren_cmd = EE_WrEnCmd | 0x30; /*wren is 100 + 11XXXX*/
441 short write_cmd = location | EE_WriteCmd;
444 printf("write_eeprom: %08x, %04hx, %04hx\n",
445 dev->iobase + ee_addr, write_cmd, value);
447 /* Shift the write enable command bits out. */
448 for (i = 9; i >= 0; i--) {
449 short cmdval = (wren_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
450 OUTL(dev, cmdval, ee_addr);
451 eeprom_delay(ee_addr);
452 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
453 eeprom_delay(ee_addr);
456 OUTL(dev, 0, ee_addr); /*bring chip select low*/
457 OUTL(dev, EE_ShiftClk, ee_addr);
458 eeprom_delay(ee_addr);
460 /* Shift the write command bits out. */
461 for (i = 9; i >= 0; i--) {
462 short cmdval = (write_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
463 OUTL(dev, cmdval, ee_addr);
464 eeprom_delay(ee_addr);
465 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
466 eeprom_delay(ee_addr);
469 for (i = 0; i < 16; i++) {
470 short cmdval = (value & (1 << i)) ? EE_Write1 : EE_Write0;
471 OUTL(dev, cmdval, ee_addr);
472 eeprom_delay(ee_addr);
473 OUTL(dev, cmdval | EE_ShiftClk, ee_addr);
474 eeprom_delay(ee_addr);
477 OUTL(dev, 0, ee_addr); /*bring chip select low*/
478 OUTL(dev, EE_ShiftClk, ee_addr);
479 for (i = 0; i < 200000; i++) {
480 OUTL(dev, EE_Write0, ee_addr); /*poll for done*/
481 if (INL(dev, ee_addr) & EE_DataOut) {
485 eeprom_delay(ee_addr);
487 /* Terminate the EEPROM access. */
488 OUTL(dev, EE_Write0, ee_addr);
489 OUTL(dev, 0, ee_addr);
495 read_eeprom(struct eth_device *dev, long addr, int location)
499 int ee_addr = (typeof(ee_addr))addr;
500 int read_cmd = location | EE_ReadCmd;
502 OUTL(dev, EE_Write0, ee_addr);
504 /* Shift the read command bits out. */
505 for (i = 10; i >= 0; i--) {
506 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
507 OUTL(dev, dataval, ee_addr);
508 eeprom_delay(ee_addr);
509 OUTL(dev, dataval | EE_ShiftClk, ee_addr);
510 eeprom_delay(ee_addr);
512 OUTL(dev, EE_ChipSelect, ee_addr);
513 eeprom_delay(ee_addr);
515 for (i = 0; i < 16; i++) {
516 OUTL(dev, EE_ChipSelect | EE_ShiftClk, ee_addr);
517 eeprom_delay(ee_addr);
518 retval |= (INL(dev, ee_addr) & EE_DataOut) ? 1 << i : 0;
519 OUTL(dev, EE_ChipSelect, ee_addr);
520 eeprom_delay(ee_addr);
523 /* Terminate the EEPROM access. */
524 OUTL(dev, EE_Write0, ee_addr);
525 OUTL(dev, 0, ee_addr);
528 printf("read_eeprom: %08x, %08x, retval %08x\n",
529 dev->iobase + ee_addr, read_cmd, retval);
534 /* MII transceiver control section.
535 The 83815 series has an internal transceiver, and we present the
536 management registers as if they were MII connected. */
539 mdio_read(struct eth_device *dev, int phy_id, int location)
541 if (phy_id == 1 && location < 32)
542 return INL(dev, BasicControl+(location<<2))&0xffff;
547 /* Function: natsemi_init
549 * Description: resets the ethernet controller chip and configures
550 * registers and data structures required for sending and receiving packets.
552 * Arguments: struct eth_device *dev: NIC data structure
558 natsemi_init(struct eth_device *dev, bd_t * bis)
564 * The PME bit is initialized from the EEPROM contents.
565 * PCI cards probably have PME disabled, but motherboard
566 * implementations may have PME set to enable WakeOnLan.
567 * With PME set the chip will scan incoming packets but
568 * nothing will be written to memory. */
569 OUTL(dev, SavedClkRun & ~0x100, ClkRun);
571 natsemi_init_rxfilter(dev);
572 natsemi_init_txd(dev);
573 natsemi_init_rxd(dev);
575 /* Configure the PCI bus bursts and FIFO thresholds. */
576 tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002);
577 rx_config = RxMxdma_256 | 0x20;
580 printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);
581 printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);
583 OUTL(dev, tx_config, TxConfig);
584 OUTL(dev, rx_config, RxConfig);
586 natsemi_check_duplex(dev);
587 natsemi_set_rx_mode(dev);
589 OUTL(dev, (RxOn | TxOn), ChipCmd);
594 * Function: natsemi_reset
596 * Description: soft resets the controller chip
598 * Arguments: struct eth_device *dev: NIC data structure
603 natsemi_reset(struct eth_device *dev)
605 OUTL(dev, ChipReset, ChipCmd);
607 /* On page 78 of the spec, they recommend some settings for "optimum
608 performance" to be done in sequence. These settings optimize some
609 of the 100Mbit autodetection circuitry. Also, we only want to do
610 this for rev C of the chip. */
611 if (INL(dev, SiliconRev) == 0x302) {
612 OUTW(dev, 0x0001, PGSEL);
613 OUTW(dev, 0x189C, PMDCSR);
614 OUTW(dev, 0x0000, TSTDAT);
615 OUTW(dev, 0x5040, DSPCFG);
616 OUTW(dev, 0x008C, SDCFG);
618 /* Disable interrupts using the mask. */
619 OUTL(dev, 0, IntrMask);
620 OUTL(dev, 0, IntrEnable);
623 /* Function: natsemi_init_rxfilter
625 * Description: sets receive filter address to our MAC address
627 * Arguments: struct eth_device *dev: NIC data structure
633 natsemi_init_rxfilter(struct eth_device *dev)
637 for (i = 0; i < ETH_ALEN; i += 2) {
638 OUTL(dev, i, RxFilterAddr);
639 OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),
645 * Function: natsemi_init_txd
647 * Description: initializes the Tx descriptor
649 * Arguments: struct eth_device *dev: NIC data structure
655 natsemi_init_txd(struct eth_device *dev)
658 txd.cmdsts = (u32) 0;
659 txd.bufptr = (u32) & txb[0];
661 /* load Transmit Descriptor Register */
662 OUTL(dev, (u32) & txd, TxRingPtr);
664 printf("natsemi_init_txd: TX descriptor reg loaded with: %#08X\n",
665 INL(dev, TxRingPtr));
669 /* Function: natsemi_init_rxd
671 * Description: initializes the Rx descriptor ring
673 * Arguments: struct eth_device *dev: NIC data structure
679 natsemi_init_rxd(struct eth_device *dev)
685 /* init RX descriptor */
686 for (i = 0; i < NUM_RX_DESC; i++) {
689 NUM_RX_DESC) ? (u32) & rxd[i +
692 rxd[i].cmdsts = cpu_to_le32((u32) RX_BUF_SIZE);
693 rxd[i].bufptr = cpu_to_le32((u32) & rxb[i * RX_BUF_SIZE]);
696 ("natsemi_init_rxd: rxd[%d]=%p link=%X cmdsts=%lX bufptr=%X\n",
697 i, &rxd[i], le32_to_cpu(rxd[i].link),
698 rxd[i].cmdsts, rxd[i].bufptr);
702 /* load Receive Descriptor Register */
703 OUTL(dev, (u32) & rxd[0], RxRingPtr);
706 printf("natsemi_init_rxd: RX descriptor register loaded with: %X\n",
707 INL(dev, RxRingPtr));
711 /* Function: natsemi_set_rx_mode
714 * sets the receive mode to accept all broadcast packets and packets
715 * with our MAC address, and reject all multicast packets.
717 * Arguments: struct eth_device *dev: NIC data structure
723 natsemi_set_rx_mode(struct eth_device *dev)
725 u32 rx_mode = AcceptBroadcast | AcceptMyPhys;
727 OUTL(dev, rx_mode, RxFilterAddr);
731 natsemi_check_duplex(struct eth_device *dev)
733 int duplex = INL(dev, ChipConfig) & FullDuplex ? 1 : 0;
736 printf("%s: Setting %s-duplex based on negotiated link"
737 " capability.\n", dev->name, duplex ? "full" : "half");
740 rx_config |= RxAcceptTx;
741 tx_config |= (TxCarrierIgn | TxHeartIgn);
743 rx_config &= ~RxAcceptTx;
744 tx_config &= ~(TxCarrierIgn | TxHeartIgn);
746 OUTL(dev, tx_config, TxConfig);
747 OUTL(dev, rx_config, RxConfig);
750 /* Function: natsemi_send
752 * Description: transmits a packet and waits for completion or timeout.
755 static int natsemi_send(struct eth_device *dev, void *packet, int length)
759 u32 *tx_ptr = &tx_status;
760 vu_long *res = (vu_long *)tx_ptr;
762 /* Stop the transmitter */
763 OUTL(dev, TxOff, ChipCmd);
767 printf("natsemi_send: sending %d bytes\n", (int) length);
770 /* set the transmit buffer descriptor and enable Transmit State Machine */
771 txd.link = cpu_to_le32(0);
772 txd.bufptr = cpu_to_le32(phys_to_bus((u32) packet));
773 txd.cmdsts = cpu_to_le32(DescOwn | length);
775 /* load Transmit Descriptor Register */
776 OUTL(dev, phys_to_bus((u32) & txd), TxRingPtr);
779 printf("natsemi_send: TX descriptor register loaded with: %#08X\n",
780 INL(dev, TxRingPtr));
782 /* restart the transmitter */
783 OUTL(dev, TxOn, ChipCmd);
786 (*res = le32_to_cpu(txd.cmdsts)) & DescOwn;
788 if (i >= TOUT_LOOP) {
790 ("%s: tx error buffer not ready: txd.cmdsts == %#X\n",
791 dev->name, tx_status);
796 if (!(tx_status & DescPktOK)) {
797 printf("natsemi_send: Transmit error, Tx status %X.\n",
807 /* Function: natsemi_poll
809 * Description: checks for a received packet and returns it if found.
811 * Arguments: struct eth_device *dev: NIC data structure
813 * Returns: 1 if packet was received.
814 * 0 if no packet was received.
817 * Returns (copies) the packet to the array dev->packet.
818 * Returns the length of the packet.
822 natsemi_poll(struct eth_device *dev)
826 u32 rx_status = le32_to_cpu(rxd[cur_rx].cmdsts);
828 if (!(rx_status & (u32) DescOwn))
832 printf("natsemi_poll: got a packet: cur_rx:%d, status:%X\n",
835 length = (rx_status & DSIZE) - CRC_SIZE;
837 if ((rx_status & (DescMore | DescPktOK | DescRxLong)) != DescPktOK) {
839 ("natsemi_poll: Corrupted packet received, buffer status = %X\n",
842 } else { /* give packet to higher level routine */
843 net_process_received_packet((rxb + cur_rx * RX_BUF_SIZE),
848 /* return the descriptor and buffer to receive ring */
849 rxd[cur_rx].cmdsts = cpu_to_le32(RX_BUF_SIZE);
850 rxd[cur_rx].bufptr = cpu_to_le32((u32) & rxb[cur_rx * RX_BUF_SIZE]);
852 if (++cur_rx == NUM_RX_DESC)
855 /* re-enable the potentially idle receive state machine */
856 OUTL(dev, RxOn, ChipCmd);
861 /* Function: natsemi_disable
863 * Description: Turns off interrupts and stops Tx and Rx engines
865 * Arguments: struct eth_device *dev: NIC data structure
871 natsemi_disable(struct eth_device *dev)
873 /* Disable interrupts using the mask. */
874 OUTL(dev, 0, IntrMask);
875 OUTL(dev, 0, IntrEnable);
877 /* Stop the chip's Tx and Rx processes. */
878 OUTL(dev, RxOff | TxOff, ChipCmd);
880 /* Restore PME enable bit */
881 OUTL(dev, SavedClkRun, ClkRun);