rtl8169.c

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/**************************************************************************
SEND - Transmit a frame
***************************************************************************/
static int rtl_send(struct eth_device *dev, volatile void *packet, int length)
{
	/* send the packet to destination */

	u32 to;
	u8 *ptxb;
	int entry = tpc->cur_tx % NUM_TX_DESC;
	u32 len = length;

#ifdef DEBUG_RTL8169_TX
	int stime = currticks();
	printf ("%s\n", __FUNCTION__);
	printf("sending %d bytes\n", len);
#endif

	ioaddr = dev->iobase;

	/* point to the current txb incase multiple tx_rings are used */
	ptxb = tpc->Tx_skbuff[entry * MAX_ETH_FRAME_SIZE];
	memcpy(ptxb, (char *)packet, (int)length);

	while (len < ETH_ZLEN)
		ptxb[len++] = '\0';

	tpc->TxDescArray[entry].buf_addr = virt_to_bus(ptxb);
	if (entry != (NUM_TX_DESC - 1)) {
		tpc->TxDescArray[entry].status =
		    (OWNbit | FSbit | LSbit) | ((len > ETH_ZLEN) ?
						len : ETH_ZLEN);
	} else {
		tpc->TxDescArray[entry].status =
		    (OWNbit | EORbit | FSbit | LSbit) |
		    ((len > ETH_ZLEN) ? length : ETH_ZLEN);
	}
	RTL_W8(TxPoll, 0x40);	/* set polling bit */

	tpc->cur_tx++;
	to = currticks() + TX_TIMEOUT;
	while ((tpc->TxDescArray[entry].status & OWNbit) && (currticks() < to));	/* wait */

	if (currticks() >= to) {
#ifdef DEBUG_RTL8169_TX
		puts ("tx timeout/error\n");
		printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
#endif
		return 0;
	} else {
#ifdef DEBUG_RTL8169_TX
		puts("tx done\n");
#endif
		return length;
	}
}

static void rtl8169_set_rx_mode(struct eth_device *dev)
{
	u32 mc_filter[2];	/* Multicast hash filter */
	int rx_mode;
	u32 tmp = 0;

#ifdef DEBUG_RTL8169
	printf ("%s\n", __FUNCTION__);
#endif

	/* IFF_ALLMULTI */
	/* Too many to filter perfectly -- accept all multicasts. */
	rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
	mc_filter[1] = mc_filter[0] = 0xffffffff;

	tmp = rtl8169_rx_config | rx_mode | (RTL_R32(RxConfig) &
				   rtl_chip_info[tpc->chipset].RxConfigMask);

	RTL_W32(RxConfig, tmp);
	RTL_W32(MAR0 + 0, mc_filter[0]);
	RTL_W32(MAR0 + 4, mc_filter[1]);
}

static void rtl8169_hw_start(struct eth_device *dev)
{
	u32 i;

#ifdef DEBUG_RTL8169
	int stime = currticks();
	printf ("%s\n", __FUNCTION__);
#endif

#if 0
	/* Soft reset the chip. */
	RTL_W8(ChipCmd, CmdReset);

	/* Check that the chip has finished the reset. */
	for (i = 1000; i > 0; i--) {
		if ((RTL_R8(ChipCmd) & CmdReset) == 0)
			break;
		else
			udelay(10);
	}
#endif

	RTL_W8(Cfg9346, Cfg9346_Unlock);
	RTL_W8(ChipCmd, CmdTxEnb | CmdRxEnb);
	RTL_W8(EarlyTxThres, EarlyTxThld);

	/* For gigabit rtl8169 */
	RTL_W16(RxMaxSize, RxPacketMaxSize);

	/* Set Rx Config register */
	i = rtl8169_rx_config | (RTL_R32(RxConfig) &
				 rtl_chip_info[tpc->chipset].RxConfigMask);
	RTL_W32(RxConfig, i);

	/* Set DMA burst size and Interframe Gap Time */
	RTL_W32(TxConfig, (TX_DMA_BURST << TxDMAShift) |
				(InterFrameGap << TxInterFrameGapShift));


	tpc->cur_rx = 0;

	RTL_W32(TxDescStartAddr, virt_to_le32desc(tpc->TxDescArray));
	RTL_W32(RxDescStartAddr, virt_to_le32desc(tpc->RxDescArray));
	RTL_W8(Cfg9346, Cfg9346_Lock);
	udelay(10);

	RTL_W32(RxMissed, 0);

	rtl8169_set_rx_mode(dev);

	/* no early-rx interrupts */
	RTL_W16(MultiIntr, RTL_R16(MultiIntr) & 0xF000);

#ifdef DEBUG_RTL8169
	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
#endif
}

static void rtl8169_init_ring(struct eth_device *dev)
{
	int i;

#ifdef DEBUG_RTL8169
	int stime = currticks();
	printf ("%s\n", __FUNCTION__);
#endif

	tpc->cur_rx = 0;
	tpc->cur_tx = 0;
	tpc->dirty_tx = 0;
	memset(tpc->TxDescArray, 0x0, NUM_TX_DESC * sizeof(struct TxDesc));
	memset(tpc->RxDescArray, 0x0, NUM_RX_DESC * sizeof(struct RxDesc));

	for (i = 0; i < NUM_TX_DESC; i++) {
		tpc->Tx_skbuff[i] = &txb[i];
	}

	for (i = 0; i < NUM_RX_DESC; i++) {
		if (i == (NUM_RX_DESC - 1))
			tpc->RxDescArray[i].status =
			    (OWNbit | EORbit) + RX_BUF_SIZE;
		else
			tpc->RxDescArray[i].status = OWNbit + RX_BUF_SIZE;

		tpc->RxBufferRing[i] = &rxb[i * RX_BUF_SIZE];
		tpc->RxDescArray[i].buf_addr =
		    virt_to_bus(tpc->RxBufferRing[i]);
	}

#ifdef DEBUG_RTL8169
	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
#endif
}

/**************************************************************************
RESET - Finish setting up the ethernet interface
***************************************************************************/
static void rtl_reset(struct eth_device *dev, bd_t *bis)
{
	int i;
	u8 diff;
	u32 TxPhyAddr, RxPhyAddr;

#ifdef DEBUG_RTL8169
	int stime = currticks();
	printf ("%s\n", __FUNCTION__);
#endif

	tpc->TxDescArrays = tx_ring;
	if (tpc->TxDescArrays == 0)
		puts("Allot Error");
	/* Tx Desscriptor needs 256 bytes alignment; */
	TxPhyAddr = virt_to_bus(tpc->TxDescArrays);
	diff = 256 - (TxPhyAddr - ((TxPhyAddr >> 8) << 8));
	TxPhyAddr += diff;
	tpc->TxDescArray = (struct TxDesc *) (tpc->TxDescArrays + diff);

	tpc->RxDescArrays = rx_ring;
	/* Rx Desscriptor needs 256 bytes alignment; */
	RxPhyAddr = virt_to_bus(tpc->RxDescArrays);
	diff = 256 - (RxPhyAddr - ((RxPhyAddr >> 8) << 8));
	RxPhyAddr += diff;
	tpc->RxDescArray = (struct RxDesc *) (tpc->RxDescArrays + diff);

	if (tpc->TxDescArrays == NULL || tpc->RxDescArrays == NULL) {
		puts("Allocate RxDescArray or TxDescArray failed\n");
		return;
	}

	rtl8169_init_ring(dev);
	rtl8169_hw_start(dev);
	/* Construct a perfect filter frame with the mac address as first match
	 * and broadcast for all others */
	for (i = 0; i < 192; i++)
		txb[i] = 0xFF;

	txb[0] = dev->enetaddr[0];
	txb[1] = dev->enetaddr[1];
	txb[2] = dev->enetaddr[2];
	txb[3] = dev->enetaddr[3];
	txb[4] = dev->enetaddr[4];
	txb[5] = dev->enetaddr[5];

#ifdef DEBUG_RTL8169
	printf ("%s elapsed time : %d\n", __FUNCTION__, currticks()-stime);
#endif
}

/**************************************************************************
HALT - Turn off ethernet interface
***************************************************************************/
static void rtl_halt(struct eth_device *dev)
{
	int i;

#ifdef DEBUG_RTL8169
	printf ("%s\n", __FUNCTION__);
#endif

	ioaddr = dev->iobase;

	/* Stop the chip's Tx and Rx DMA processes. */
	RTL_W8(ChipCmd, 0x00);

	/* Disable interrupts by clearing the interrupt mask. */
	RTL_W16(IntrMask, 0x0000);

	RTL_W32(RxMissed, 0);

	tpc->TxDescArrays = NULL;
	tpc->RxDescArrays = NULL;
	tpc->TxDescArray = NULL;
	tpc->RxDescArray = NULL;
	for (i = 0; i < NUM_RX_DESC; i++) {
		tpc->RxBufferRing[i] = NULL;
	}
}

/**************************************************************************
INIT - Look for an adapter, this routine's visible to the outside
***************************************************************************/

#define board_found 1
#define valid_link 0
static int rtl_init(struct eth_device *dev, bd_t *bis)
{
	static int board_idx = -1;
	static int printed_version = 0;
	int i, rc;
	int option = -1, Cap10_100 = 0, Cap1000 = 0;

#ifdef DEBUG_RTL8169
	printf ("%s\n", __FUNCTION__);
#endif

	ioaddr = dev->iobase;

	board_idx++;

	printed_version = 1;

	/* point to private storage */
	tpc = &tpx;

	rc = rtl8169_init_board(dev);
	if (rc)
		return rc;

	/* Get MAC address.  FIXME: read EEPROM */
	for (i = 0; i < MAC_ADDR_LEN; i++)
		dev->enetaddr[i] = RTL_R8(MAC0 + i);

#ifdef DEBUG_RTL8169
	printf("MAC Address");
	for (i = 0; i < MAC_ADDR_LEN; i++)
		printf(":%02x", dev->enetaddr[i]);
	putc('\n');
#endif

#ifdef DEBUG_RTL8169
	/* Print out some hardware info */
	printf("%s: at ioaddr 0x%x\n", dev->name, ioaddr);
#endif

	/* if TBI is not endbled */
	if (!(RTL_R8(PHYstatus) & TBI_Enable)) {
		int val = mdio_read(PHY_AUTO_NEGO_REG);

		option = (board_idx >= MAX_UNITS) ? 0 : media[board_idx];
		/* Force RTL8169 in 10/100/1000 Full/Half mode. */
		if (option > 0) {
#ifdef DEBUG_RTL8169
			printf("%s: Force-mode Enabled.\n", dev->name);
#endif
			Cap10_100 = 0, Cap1000 = 0;
			switch (option) {
			case _10_Half:
				Cap10_100 = PHY_Cap_10_Half;
				Cap1000 = PHY_Cap_Null;
				break;
			case _10_Full:
				Cap10_100 = PHY_Cap_10_Full;
				Cap1000 = PHY_Cap_Null;
				break;
			case _100_Half:
				Cap10_100 = PHY_Cap_100_Half;
				Cap1000 = PHY_Cap_Null;
				break;
			case _100_Full:
				Cap10_100 = PHY_Cap_100_Full;
				Cap1000 = PHY_Cap_Null;
				break;
			case _1000_Full:
				Cap10_100 = PHY_Cap_Null;
				Cap1000 = PHY_Cap_1000_Full;
				break;
			default:
				break;
			}
			mdio_write(PHY_AUTO_NEGO_REG, Cap10_100 | (val & 0x1F));	/* leave PHY_AUTO_NEGO_REG bit4:0 unchanged */
			mdio_write(PHY_1000_CTRL_REG, Cap1000);
		} else {
#ifdef DEBUG_RTL8169
			printf("%s: Auto-negotiation Enabled.\n",
			       dev->name);
#endif
			/* enable 10/100 Full/Half Mode, leave PHY_AUTO_NEGO_REG bit4:0 unchanged */
			mdio_write(PHY_AUTO_NEGO_REG,
				   PHY_Cap_10_Half | PHY_Cap_10_Full |
				   PHY_Cap_100_Half | PHY_Cap_100_Full |
				   (val & 0x1F));

			/* enable 1000 Full Mode */
			mdio_write(PHY_1000_CTRL_REG, PHY_Cap_1000_Full);

		}

		/* Enable auto-negotiation and restart auto-nigotiation */
		mdio_write(PHY_CTRL_REG,
			   PHY_Enable_Auto_Nego | PHY_Restart_Auto_Nego);
		udelay(100);

		/* wait for auto-negotiation process */
		for (i = 10000; i > 0; i--) {
			/* check if auto-negotiation complete */
			if (mdio_read(PHY_STAT_REG) & PHY_Auto_Neco_Comp) {
				udelay(100);
				option = RTL_R8(PHYstatus);
				if (option & _1000bpsF) {
#ifdef DEBUG_RTL8169
					printf("%s: 1000Mbps Full-duplex operation.\n",
					     dev->name);
#endif
				} else {
#ifdef DEBUG_RTL8169
					printf
					    ("%s: %sMbps %s-duplex operation.\n",
					     dev->name,
					     (option & _100bps) ? "100" :
					     "10",
					     (option & FullDup) ? "Full" :
					     "Half");
#endif
				}
				break;
			} else {
				udelay(100);
			}
		}		/* end for-loop to wait for auto-negotiation process */

	} else {
		udelay(100);
#ifdef DEBUG_RTL8169
		printf
		    ("%s: 1000Mbps Full-duplex operation, TBI Link %s!\n",
		     dev->name,
		     (RTL_R32(TBICSR) & TBILinkOK) ? "OK" : "Failed");
#endif
	}

	return 1;
}

int rtl8169_initialize(bd_t *bis)
{
	pci_dev_t devno;
	int card_number = 0;
	struct eth_device *dev;
	u32 iobase;
	int idx=0;

	while(1){
		/* Find RTL8169 */
		if ((devno = pci_find_devices(supported, idx++)) < 0)
			break;

		pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
		iobase &= ~0xf;

		debug ("rtl8169: REALTEK RTL8169 @0x%x\n", iobase);

		dev = (struct eth_device *)malloc(sizeof *dev);

		sprintf (dev->name, "RTL8169#%d", card_number);

		dev->priv = (void *) devno;
		dev->iobase = (int)bus_to_phys(iobase);

		dev->init = rtl_reset;
		dev->halt = rtl_halt;
		dev->send = rtl_send;
		dev->recv = rtl_recv;

		eth_register (dev);

		rtl_init(dev, bis);

		card_number++;
	}
	return card_number;
}

#endif