2  * rtl8139.c : U-Boot driver for the RealTek RTL8139
10 /* rtl8139.c - etherboot driver for the Realtek 8139 chipset
13   by Rainer Bawidamann (Rainer.Bawidamann@informatik.uni-ulm.de) 1999
19   - removed support for interrupts, switching to polling mode (yuck!)
20   - removed support for the 8129 chip (external MII)
33      Following email from Hyun-Joon Cha, added a disable routine, otherwise
36   4 Feb 2000	espenlaub@informatik.uni-ulm.de (Klaus Espenlaub)
40      0x98000-0x9ffff range.  This is a bit of a hack, but currently the only
44      which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000.  My
51      hunting session.  It took me about a week full time work - poking around
53      driver and even the FreeBSD driver (what a piece of crap!) - and
67   28 Jul 1999	(Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de)
70      transmission performace - below 1kBytes/s.
91 #define RX_BUF_LEN_IDX 0	/* 0, 1, 2 is allowed - 8,16,32K rx buffer */
97 #define bus_to_phys(a)	pci_mem_to_phys((pci_dev_t)dev->priv, a)
98 #define phys_to_bus(a)	pci_phys_to_mem((pci_dev_t)dev->priv, a)
110 	Timer=0x48,		/* general-purpose counter. */
183 static int rtl_transmit(struct eth_device *dev, void *packet, int length);
222 		sprintf (dev->name, "RTL8139#%d", card_number);  in rtl8139_initialize()
224 		dev->priv = (void *) devno;  in rtl8139_initialize()
225 		dev->iobase = (int)bus_to_phys(iobase);  in rtl8139_initialize()
226 		dev->init = rtl8139_probe;  in rtl8139_initialize()
227 		dev->halt = rtl_disable;  in rtl8139_initialize()
228 		dev->send = rtl_transmit;  in rtl8139_initialize()
229 		dev->recv = rtl_poll;  in rtl8139_initialize()
230 		dev->mcast = rtl_bcast_addr;  in rtl8139_initialize()
248 	unsigned short *ap = (unsigned short *)dev->enetaddr;  in rtl8139_probe()
250 	ioaddr = dev->iobase;  in rtl8139_probe()
252 	/* Bring the chip out of low-power mode. */  in rtl8139_probe()
263 		return -1 ;  in rtl8139_probe()
287 /* The EEPROM commands include the alway-set leading bit. */
304 	for (i = 4 + addr_len; i >= 0; i--) {  in read_eeprom()
314 	for (i = 16; i > 0; i--) {  in read_eeprom()
363 		outb(dev->enetaddr[i], ioaddr + MAC0 + i);  in rtl_reset()
372 	 * for half duplex or full/autodetect duplex (for full/autodetect, the  in rtl_reset()
373 	 * outputs are TX/RX, Link10/100, FULL, while for half duplex it uses  in rtl_reset()
402 static int rtl_transmit(struct eth_device *dev, void *packet, int length)  in rtl_transmit()  argument
406 	unsigned int len = length;  in rtl_transmit()
409 	ioaddr = dev->iobase;  in rtl_transmit()
411 	memcpy((char *)tx_buffer, (char *)packet, (int)length);  in rtl_transmit()
415 	/* Note: RTL8139 doesn't auto-pad, send minimum payload (another 4  in rtl_transmit()
421 	flush_cache((unsigned long)tx_buffer, length);  in rtl_transmit()
429 		 * here - the RxOverflow/RxFIFOOver MUST be handled in the  in rtl_transmit()
445 		return length;  in rtl_transmit()
463 	int length=0;  in rtl_poll()  local
465 	ioaddr = dev->iobase;  in rtl_poll()
478 	/* ring_offs is guaranteed being 4-byte aligned */  in rtl_poll()
491 	length = rx_size - 4;	/* no one cares about the FCS */  in rtl_poll()
492 	if (ring_offs+4+rx_size-4 > RX_BUF_LEN) {  in rtl_poll()
493 		int semi_count = RX_BUF_LEN - ring_offs - 4;  in rtl_poll()
497 		memcpy(&(rxdata[semi_count]), rx_ring, rx_size-4-semi_count);  in rtl_poll()
499 		net_process_received_packet(rxdata, length);  in rtl_poll()
501 			semi_count, rx_size-4-semi_count);  in rtl_poll()
503 		net_process_received_packet(rx_ring + ring_offs + 4, length);  in rtl_poll()
504 		debug_cond(DEBUG_RX, "rx packet %d bytes", rx_size-4);  in rtl_poll()
509 	outw(cur_rx - 16, ioaddr + RxBufPtr);  in rtl_poll()
514 	return length;  in rtl_poll()
521 	ioaddr = dev->iobase;  in rtl_disable()