ax88180.c

来自「最新版的u-boot,2008-10-18发布」· C语言 代码 · 共 728 行 · 第 1/2 页

/*
 * ax88180: ASIX AX88180 Non-PCI Gigabit Ethernet u-boot driver
 *
 * This program is free software; you can distribute it and/or modify
 * it under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 * This program is distributed in the hope it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
 * USA.
 */

/*
 * ========================================================================
 * ASIX AX88180 Non-PCI 16/32-bit Gigabit Ethernet Linux Driver
 *
 * The AX88180 Ethernet controller is a high performance and highly
 * integrated local CPU bus Ethernet controller with embedded 40K bytes
 * SRAM and supports both 16-bit and 32-bit SRAM-Like interfaces for any
 * embedded systems.
 * The AX88180 is a single chip 10/100/1000Mbps Gigabit Ethernet
 * controller that supports both MII and RGMII interfaces and is
 * compliant to IEEE 802.3, IEEE 802.3u and IEEE 802.3z standards.
 *
 * Please visit ASIX's web site (http://www.asix.com.tw) for more
 * details.
 *
 * Module Name	: ax88180.c
 * Date		: 2008-07-07
 * History
 * 09/06/2006	: New release for AX88180 US2 chip.
 * 07/07/2008	: Fix up the coding style and using inline functions
 *		  instead of macros
 * ========================================================================
 */
#include <common.h>
#include <command.h>
#include <net.h>
#include <malloc.h>
#include "ax88180.h"

/*
 * ===========================================================================
 * Local SubProgram Declaration
 * ===========================================================================
 */
static void ax88180_rx_handler (struct eth_device *dev);
static int ax88180_phy_initial (struct eth_device *dev);
static void ax88180_meidia_config (struct eth_device *dev);
static unsigned long get_CicadaPHY_meida_mode (struct eth_device *dev);
static unsigned long get_MarvellPHY_meida_mode (struct eth_device *dev);
static unsigned short ax88180_mdio_read (struct eth_device *dev,
					 unsigned long regaddr);
static void ax88180_mdio_write (struct eth_device *dev,
				unsigned long regaddr, unsigned short regdata);

/*
 * ===========================================================================
 * Local SubProgram Bodies
 * ===========================================================================
 */
static int ax88180_mdio_check_complete (struct eth_device *dev)
{
	int us_cnt = 10000;
	unsigned short tmpval;

	/* MDIO read/write should not take more than 10 ms */
	while (--us_cnt) {
		tmpval = INW (dev, MDIOCTRL);
		if (((tmpval & READ_PHY) == 0) && ((tmpval & WRITE_PHY) == 0))
			break;
	}

	return us_cnt;
}

static unsigned short
ax88180_mdio_read (struct eth_device *dev, unsigned long regaddr)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
	unsigned long tmpval = 0;

	OUTW (dev, (READ_PHY | (regaddr << 8) | priv->PhyAddr), MDIOCTRL);

	if (ax88180_mdio_check_complete (dev))
		tmpval = INW (dev, MDIODP);
	else
		printf ("Failed to read PHY register!\n");

	return (unsigned short)(tmpval & 0xFFFF);
}

static void
ax88180_mdio_write (struct eth_device *dev, unsigned long regaddr,
		    unsigned short regdata)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;

	OUTW (dev, regdata, MDIODP);

	OUTW (dev, (WRITE_PHY | (regaddr << 8) | priv->PhyAddr), MDIOCTRL);

	if (!ax88180_mdio_check_complete (dev))
		printf ("Failed to write PHY register!\n");
}

static int ax88180_phy_reset (struct eth_device *dev)
{
	unsigned short delay_cnt = 500;

	ax88180_mdio_write (dev, BMCR, (PHY_RESET | AUTONEG_EN));

	/* Wait for the reset to complete, or time out (500 ms) */
	while (ax88180_mdio_read (dev, BMCR) & PHY_RESET) {
		udelay (1000);
		if (--delay_cnt == 0) {
			printf ("Failed to reset PHY!\n");
			return -1;
		}
	}

	return 0;
}

static void ax88180_mac_reset (struct eth_device *dev)
{
	unsigned long tmpval;
	unsigned char i;

	struct {
		unsigned short offset, value;
	} program_seq[] = {
		{
		MISC, MISC_NORMAL}, {
		RXINDICATOR, DEFAULT_RXINDICATOR}, {
		TXCMD, DEFAULT_TXCMD}, {
		TXBS, DEFAULT_TXBS}, {
		TXDES0, DEFAULT_TXDES0}, {
		TXDES1, DEFAULT_TXDES1}, {
		TXDES2, DEFAULT_TXDES2}, {
		TXDES3, DEFAULT_TXDES3}, {
		TXCFG, DEFAULT_TXCFG}, {
		MACCFG2, DEFAULT_MACCFG2}, {
		MACCFG3, DEFAULT_MACCFG3}, {
		TXLEN, DEFAULT_TXLEN}, {
		RXBTHD0, DEFAULT_RXBTHD0}, {
		RXBTHD1, DEFAULT_RXBTHD1}, {
		RXFULTHD, DEFAULT_RXFULTHD}, {
		DOGTHD0, DEFAULT_DOGTHD0}, {
	DOGTHD1, DEFAULT_DOGTHD1},};

	OUTW (dev, MISC_RESET_MAC, MISC);
	tmpval = INW (dev, MISC);

	for (i = 0; i < (sizeof (program_seq) / sizeof (program_seq[0])); i++)
		OUTW (dev, program_seq[i].value, program_seq[i].offset);
}

static int ax88180_poll_tx_complete (struct eth_device *dev)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
	unsigned long tmpval, txbs_txdp;
	int TimeOutCnt = 10000;

	txbs_txdp = 1 << priv->NextTxDesc;

	while (TimeOutCnt--) {

		tmpval = INW (dev, TXBS);

		if ((tmpval & txbs_txdp) == 0)
			break;

		udelay (100);
	}

	if (TimeOutCnt)
		return 0;
	else
		return -TimeOutCnt;
}

static void ax88180_rx_handler (struct eth_device *dev)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
	unsigned long data_size;
	unsigned short rxcurt_ptr, rxbound_ptr, next_ptr;
	int i;
#if defined (CONFIG_DRIVER_AX88180_16BIT)
	unsigned short *rxdata = (unsigned short *)NetRxPackets[0];
#else
	unsigned long *rxdata = (unsigned long *)NetRxPackets[0];
#endif
	unsigned short count;

	rxcurt_ptr = INW (dev, RXCURT);
	rxbound_ptr = INW (dev, RXBOUND);
	next_ptr = (rxbound_ptr + 1) & RX_PAGE_NUM_MASK;

	debug ("ax88180: RX original RXBOUND=0x%04x,"
	       " RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);

	while (next_ptr != rxcurt_ptr) {

		OUTW (dev, RX_START_READ, RXINDICATOR);

		data_size = READ_RXBUF (dev) & 0xFFFF;

		if ((data_size == 0) || (data_size > MAX_RX_SIZE)) {

			OUTW (dev, RX_STOP_READ, RXINDICATOR);

			ax88180_mac_reset (dev);
			printf ("ax88180: Invalid Rx packet length!"
				" (len=0x%04lx)\n", data_size);

			debug ("ax88180: RX RXBOUND=0x%04x,"
			       "RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);
			return;
		}

		rxbound_ptr += (((data_size + 0xF) & 0xFFF0) >> 4) + 1;
		rxbound_ptr &= RX_PAGE_NUM_MASK;

		/* Comput access times */
		count = (data_size + priv->PadSize) >> priv->BusWidth;

		for (i = 0; i < count; i++) {
			*(rxdata + i) = READ_RXBUF (dev);
		}

		OUTW (dev, RX_STOP_READ, RXINDICATOR);

		/* Pass the packet up to the protocol layers. */
		NetReceive (NetRxPackets[0], data_size);

		OUTW (dev, rxbound_ptr, RXBOUND);

		rxcurt_ptr = INW (dev, RXCURT);
		rxbound_ptr = INW (dev, RXBOUND);
		next_ptr = (rxbound_ptr + 1) & RX_PAGE_NUM_MASK;

		debug ("ax88180: RX updated RXBOUND=0x%04x,"
		       "RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);
	}

	return;
}

static int ax88180_phy_initial (struct eth_device *dev)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
	unsigned long tmp_regval;

	/* Check avaliable PHY chipset  */
	priv->PhyAddr = MARVELL_88E1111_PHYADDR;
	priv->PhyID0 = ax88180_mdio_read (dev, PHYIDR0);

	if (priv->PhyID0 == MARVELL_88E1111_PHYIDR0) {

		debug ("ax88180: Found Marvell 88E1111 PHY."
		       " (PHY Addr=0x%x)\n", priv->PhyAddr);

		tmp_regval = ax88180_mdio_read (dev, M88_EXT_SSR);
		if ((tmp_regval & HWCFG_MODE_MASK) == RGMII_COPPER_MODE) {

			ax88180_mdio_write (dev, M88_EXT_SCR, DEFAULT_EXT_SCR);
			if (ax88180_phy_reset (dev) < 0)
				return 0;
			ax88180_mdio_write (dev, M88_IER, LINK_CHANGE_INT);
		}
	} else {

		priv->PhyAddr = CICADA_CIS8201_PHYADDR;
		priv->PhyID0 = ax88180_mdio_read (dev, PHYIDR0);

		if (priv->PhyID0 == CICADA_CIS8201_PHYIDR0) {

			debug ("ax88180: Found CICADA CIS8201 PHY"
			       " chipset. (PHY Addr=0x%x)\n", priv->PhyAddr);
			ax88180_mdio_write (dev, CIS_IMR,
					    (CIS_INT_ENABLE | LINK_CHANGE_INT));

			/* Set CIS_SMI_PRIORITY bit before force the media mode */
			tmp_regval =
			    ax88180_mdio_read (dev, CIS_AUX_CTRL_STATUS);
			tmp_regval &= ~CIS_SMI_PRIORITY;
			ax88180_mdio_write (dev, CIS_AUX_CTRL_STATUS,
					    tmp_regval);
		} else {
			printf ("ax88180: Unknown PHY chipset!!\n");
			return 0;
		}
	}

	return 1;
}

static void ax88180_meidia_config (struct eth_device *dev)
{
	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
	unsigned long bmcr_val, bmsr_val;
	unsigned long rxcfg_val, maccfg0_val, maccfg1_val;
	unsigned long RealMediaMode;
	int i;

	/* Waiting 2 seconds for PHY link stable */
	for (i = 0; i < 20000; i++) {
		bmsr_val = ax88180_mdio_read (dev, BMSR);
		if (bmsr_val & LINKOK) {
			break;
		}
		udelay (100);
	}

	bmsr_val = ax88180_mdio_read (dev, BMSR);
	debug ("ax88180: BMSR=0x%04x\n", (unsigned int)bmsr_val);

	if (bmsr_val & LINKOK) {
		bmcr_val = ax88180_mdio_read (dev, BMCR);

		if (bmcr_val & AUTONEG_EN) {

			/*
			 * Waiting for Auto-negotiation completion, this may
			 * take up to 5 seconds.
			 */
			debug ("ax88180: Auto-negotiation is "
			       "enabled. Waiting for NWay completion..\n");
			for (i = 0; i < 50000; i++) {
				bmsr_val = ax88180_mdio_read (dev, BMSR);
				if (bmsr_val & AUTONEG_COMPLETE) {
					break;
				}
				udelay (100);
			}
		} else
			debug ("ax88180: Auto-negotiation is disabled.\n");

		debug ("ax88180: BMCR=0x%04x, BMSR=0x%04x\n",
		       (unsigned int)bmcr_val, (unsigned int)bmsr_val);

		/* Get real media mode here */
		if (priv->PhyID0 == MARVELL_88E1111_PHYIDR0) {
			RealMediaMode = get_MarvellPHY_meida_mode (dev);
		} else if (priv->PhyID0 == CICADA_CIS8201_PHYIDR0) {
			RealMediaMode = get_CicadaPHY_meida_mode (dev);
		} else {
			RealMediaMode = MEDIA_1000FULL;
		}

		priv->LinkState = INS_LINK_UP;

		switch (RealMediaMode) {
		case MEDIA_1000FULL:
			debug ("ax88180: 1000Mbps Full-duplex mode.\n");
			rxcfg_val = RXFLOW_ENABLE | DEFAULT_RXCFG;
			maccfg0_val = TXFLOW_ENABLE | DEFAULT_MACCFG0;
			maccfg1_val = GIGA_MODE_EN | RXFLOW_EN |
			    FULLDUPLEX | DEFAULT_MACCFG1;