2    natsemi.c: A U-Boot driver for the NatSemi DP8381x series.
21    Written/copyright 1999-2001 by Donald Becker.
48  *   Initial U-Boot Release.  Tested with Netgear FA311 board
61 #define EEPROM_SIZE 0xb /*12 16-bit chunks, or 24 bytes*/
69 #define NUM_RX_DESC	4	/* Number of Rx descriptor registers. */
72    Unlike software-only systems, device drivers interact with complex hardware.
229 			 short value);
249 #define bus_to_phys(a)	pci_mem_to_phys((pci_dev_t)dev->priv, a)
250 #define phys_to_bus(a)	pci_phys_to_mem((pci_dev_t)dev->priv, a)
255 	return le16_to_cpu(*(vu_short *) (addr + dev->iobase));  in INW()
261 	return le32_to_cpu(*(vu_long *) (addr + dev->iobase));  in INL()
267 	*(vu_short *) ((addr + dev->iobase)) = cpu_to_le16(command);  in OUTW()
273 	*(vu_long *) ((addr + dev->iobase)) = cpu_to_le32(command);  in OUTL()
329 		sprintf(dev->name, "dp83815#%d", card_number);  in natsemi_initialize()
330 		dev->iobase = bus_to_phys(iobase);  in natsemi_initialize()
332 		printf("natsemi: NatSemi ns8381[56] @ %#x\n", dev->iobase);  in natsemi_initialize()
334 		dev->priv = (void *) devno;  in natsemi_initialize()
335 		dev->init = natsemi_init;  in natsemi_initialize()
336 		dev->halt = natsemi_disable;  in natsemi_initialize()
337 		dev->send = natsemi_send;  in natsemi_initialize()
338 		dev->recv = natsemi_poll;  in natsemi_initialize()
349 		/* natsemi has a non-standard PM control register  in natsemi_initialize()
361 			short eedata = read_eeprom(dev, EECtrl, i);  in natsemi_initialize()
370 			dev->enetaddr[i*2] = (eedata << 1) + (prev_eedata >> 15);  in natsemi_initialize()
371 			dev->enetaddr[i*2+1] = eedata >> 7;  in natsemi_initialize()
382 			dev->name, (int) INL(dev, BasicStatus), advertising);  in natsemi_initialize()
384 			dev->name, chip_config & AnegMask ? "enabled, advertise" :  in natsemi_initialize()
391 			dev->name, chip_config & AnegMask ? "enabled, advertise" :  in natsemi_initialize()
397 		/*un-reset phy*/  in natsemi_initialize()
429 /* The EEPROM commands include the alway-set leading bit. */
437 write_eeprom(struct eth_device *dev, long addr, int location, short value)
441 	short wren_cmd = EE_WrEnCmd | 0x30; /*wren is 100 + 11XXXX*/
442 	short write_cmd = location | EE_WriteCmd;
446 		dev->iobase + ee_addr, write_cmd, value);
449 	for (i = 9; i >= 0; i--) {
450 		short cmdval = (wren_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
462 	for (i = 9; i >= 0; i--) {
463 		short cmdval = (write_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
471 		short cmdval = (value & (1 << i)) ? EE_Write1 : EE_Write0;
506 	for (i = 10; i >= 0; i--) {  in read_eeprom()
507 		short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;  in read_eeprom()
530 			dev->iobase + ee_addr, read_cmd, retval);  in read_eeprom()
581 	printf("%s: Setting TxConfig Register %#08X\n", dev->name, tx_config);  in natsemi_init()
582 	printf("%s: Setting RxConfig Register %#08X\n", dev->name, rx_config);  in natsemi_init()
640 		OUTW(dev, dev->enetaddr[i] + (dev->enetaddr[i + 1] << 8),  in natsemi_init_rxfilter()
648  * Description: initializes the Tx descriptor
662 	/* load Transmit Descriptor Register */  in natsemi_init_txd()
665 	printf("natsemi_init_txd: TX descriptor reg loaded with: %#08X\n",  in natsemi_init_txd()
672  * Description: initializes the Rx descriptor ring
686 	/* init RX descriptor */  in natsemi_init_rxd()
703 	/* load Receive Descriptor Register */  in natsemi_init_rxd()
707 	printf("natsemi_init_rxd: RX descriptor register loaded with: %X\n",  in natsemi_init_rxd()
737 	printf("%s: Setting %s-duplex based on negotiated link"  in natsemi_check_duplex()
738 	       " capability.\n", dev->name, duplex ? "full" : "half");  in natsemi_check_duplex()
771 	/* set the transmit buffer descriptor and enable Transmit State Machine */  in natsemi_send()
776 	/* load Transmit Descriptor Register */  in natsemi_send()
780 	    printf("natsemi_send: TX descriptor register loaded with: %#08X\n",  in natsemi_send()
792 			     dev->name, tx_status);  in natsemi_send()
818  *            Returns (copies) the packet to the array dev->packet.
836 	length = (rx_status & DSIZE) - CRC_SIZE;  in natsemi_poll()
849 	/* return the descriptor and buffer to receive ring */  in natsemi_poll()
856 	/* re-enable the potentially idle receive state machine */  in natsemi_poll()