+++ /dev/null
-/***********************************************************************
- *
- * Copyright (C) 2004 by FS Forth-Systeme GmbH.
- * All rights reserved.
- *
- * $Id: ns9750_eth.c,v 1.2 2004/02/24 14:09:39 mpietrek Exp $
- * @Author: Markus Pietrek
- * @Descr: Ethernet driver for the NS9750. Uses DMA Engine with polling
- * interrupt status. But interrupts are not enabled.
- * Only one tx buffer descriptor and the RXA buffer descriptor are used
- * Currently no transmit lockup handling is included. eth_send has a 5s
- * timeout for sending frames. No retransmits are performed when an
- * error occurs.
- * @References: [1] NS9750 Hardware Reference, December 2003
- * [2] Intel LXT971 Datasheet #249414 Rev. 02
- * [3] NS7520 Linux Ethernet Driver
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that 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
- *
- ***********************************************************************/
-
-#include <common.h>
-#include <net.h> /* NetSendPacket */
-
-#include "ns9750_eth.h" /* for Ethernet and PHY */
-
-/* some definition to make transition to linux easier */
-
-#define NS9750_DRIVER_NAME "eth"
-#define KERN_WARNING "Warning:"
-#define KERN_ERR "Error:"
-#define KERN_INFO "Info:"
-
-#if 0
-# define DEBUG
-#endif
-
-#ifdef DEBUG
-# define printk printf
-
-# define DEBUG_INIT 0x0001
-# define DEBUG_MINOR 0x0002
-# define DEBUG_RX 0x0004
-# define DEBUG_TX 0x0008
-# define DEBUG_INT 0x0010
-# define DEBUG_POLL 0x0020
-# define DEBUG_LINK 0x0040
-# define DEBUG_MII 0x0100
-# define DEBUG_MII_LOW 0x0200
-# define DEBUG_MEM 0x0400
-# define DEBUG_ERROR 0x4000
-# define DEBUG_ERROR_CRIT 0x8000
-
-static int nDebugLvl = DEBUG_ERROR_CRIT;
-
-# define DEBUG_ARGS0( FLG, a0 ) if( ( nDebugLvl & (FLG) ) == (FLG) ) \
- printf("%s: " a0, __FUNCTION__, 0, 0, 0, 0, 0, 0 )
-# define DEBUG_ARGS1( FLG, a0, a1 ) if( ( nDebugLvl & (FLG) ) == (FLG)) \
- printf("%s: " a0, __FUNCTION__, (int)(a1), 0, 0, 0, 0, 0 )
-# define DEBUG_ARGS2( FLG, a0, a1, a2 ) if( (nDebugLvl & (FLG)) ==(FLG))\
- printf("%s: " a0, __FUNCTION__, (int)(a1), (int)(a2), 0, 0,0,0 )
-# define DEBUG_ARGS3( FLG, a0, a1, a2, a3 ) if((nDebugLvl &(FLG))==(FLG))\
- printf("%s: "a0,__FUNCTION__,(int)(a1),(int)(a2),(int)(a3),0,0,0)
-# define DEBUG_FN( FLG ) if( (nDebugLvl & (FLG)) == (FLG) ) \
- printf("\r%s:line %d\n", (int)__FUNCTION__, __LINE__, 0,0,0,0);
-# define ASSERT( expr, func ) if( !( expr ) ) { \
- printf( "Assertion failed! %s:line %d %s\n", \
- (int)__FUNCTION__,__LINE__,(int)(#expr),0,0,0); \
- func }
-#else /* DEBUG */
-# define printk(...)
-# define DEBUG_ARGS0( FLG, a0 )
-# define DEBUG_ARGS1( FLG, a0, a1 )
-# define DEBUG_ARGS2( FLG, a0, a1, a2 )
-# define DEBUG_ARGS3( FLG, a0, a1, a2, a3 )
-# define DEBUG_FN( n )
-# define ASSERT(expr, func)
-#endif /* DEBUG */
-
-#define NS9750_MII_NEG_DELAY (5*CONFIG_SYS_HZ) /* in s */
-#define TX_TIMEOUT (5*CONFIG_SYS_HZ) /* in s */
-
-/* @TODO move it to eeprom.h */
-#define FS_EEPROM_AUTONEG_MASK 0x7
-#define FS_EEPROM_AUTONEG_SPEED_MASK 0x1
-#define FS_EEPROM_AUTONEG_SPEED_10 0x0
-#define FS_EEPROM_AUTONEG_SPEED_100 0x1
-#define FS_EEPROM_AUTONEG_DUPLEX_MASK 0x2
-#define FS_EEPROM_AUTONEG_DUPLEX_HALF 0x0
-#define FS_EEPROM_AUTONEG_DUPLEX_FULL 0x2
-#define FS_EEPROM_AUTONEG_ENABLE_MASK 0x4
-#define FS_EEPROM_AUTONEG_DISABLE 0x0
-#define FS_EEPROM_AUTONEG_ENABLE 0x4
-
-/* buffer descriptors taken from [1] p.306 */
-typedef struct
-{
- unsigned int* punSrc;
- unsigned int unLen; /* 11 bits */
- unsigned int* punDest; /* unused */
- union {
- unsigned int unReg;
- struct {
- unsigned uStatus : 16;
- unsigned uRes : 12;
- unsigned uFull : 1;
- unsigned uEnable : 1;
- unsigned uInt : 1;
- unsigned uWrap : 1;
- } bits;
- } s;
-} rx_buffer_desc_t;
-
-typedef struct
-{
- unsigned int* punSrc;
- unsigned int unLen; /* 10 bits */
- unsigned int* punDest; /* unused */
- union {
- unsigned int unReg; /* only 32bit accesses may done to NS9750
- * eth engine */
- struct {
- unsigned uStatus : 16;
- unsigned uRes : 12;
- unsigned uFull : 1;
- unsigned uLast : 1;
- unsigned uInt : 1;
- unsigned uWrap : 1;
- } bits;
- } s;
-} tx_buffer_desc_t;
-
-static int ns9750_eth_reset( void );
-
-static void ns9750_link_force( void );
-static void ns9750_link_auto_negotiate( void );
-static void ns9750_link_update_egcr( void );
-static void ns9750_link_print_changed( void );
-
-/* the PHY stuff */
-
-static char ns9750_mii_identify_phy( void );
-static unsigned short ns9750_mii_read( unsigned short uiRegister );
-static void ns9750_mii_write( unsigned short uiRegister, unsigned short uiData );
-static unsigned int ns9750_mii_get_clock_divisor( unsigned int unMaxMDIOClk );
-static unsigned int ns9750_mii_poll_busy( void );
-
-static unsigned int nPhyMaxMdioClock = PHY_MDIO_MAX_CLK;
-static unsigned char ucLinkMode = FS_EEPROM_AUTONEG_ENABLE;
-static unsigned int uiLastLinkStatus;
-static PhyType phyDetected = PHY_NONE;
-
-/* we use only one tx buffer descriptor */
-static tx_buffer_desc_t* pTxBufferDesc =
- (tx_buffer_desc_t*) get_eth_reg_addr( NS9750_ETH_TXBD );
-
-/* we use only one rx buffer descriptor of the 4 */
-static rx_buffer_desc_t aRxBufferDesc[ 4 ];
-
-/***********************************************************************
- * @Function: eth_init
- * @Return: -1 on failure otherwise 0
- * @Descr: Initializes the ethernet engine and uses either FS Forth's default
- * MAC addr or the one in environment
- ***********************************************************************/
-
-int eth_init (bd_t * pbis)
-{
- /* This default MAC Addr is reserved by FS Forth-Systeme for the case of
- EEPROM failures */
- unsigned char aucMACAddr[6] = { 0x00, 0x04, 0xf3, 0x00, 0x06, 0x35 };
- char *pcTmp = getenv ("ethaddr");
- char *pcEnd;
- int i;
-
- DEBUG_FN (DEBUG_INIT);
-
- /* no need to check for hardware */
-
- if (!ns9750_eth_reset ())
- return -1;
-
- if (pcTmp != NULL)
- for (i = 0; i < 6; i++) {
- aucMACAddr[i] =
- pcTmp ? simple_strtoul (pcTmp, &pcEnd,
- 16) : 0;
- pcTmp = (*pcTmp) ? pcEnd + 1 : pcEnd;
- }
-
- /* configure ethernet address */
-
- *get_eth_reg_addr (NS9750_ETH_SA1) =
- aucMACAddr[5] << 8 | aucMACAddr[4];
- *get_eth_reg_addr (NS9750_ETH_SA2) =
- aucMACAddr[3] << 8 | aucMACAddr[2];
- *get_eth_reg_addr (NS9750_ETH_SA3) =
- aucMACAddr[1] << 8 | aucMACAddr[0];
-
- /* enable hardware */
-
- *get_eth_reg_addr (NS9750_ETH_MAC1) = NS9750_ETH_MAC1_RXEN;
-
- /* the linux kernel may give packets < 60 bytes, for example arp */
- *get_eth_reg_addr (NS9750_ETH_MAC2) = NS9750_ETH_MAC2_CRCEN |
- NS9750_ETH_MAC2_PADEN | NS9750_ETH_MAC2_HUGE;
-
- /* enable receive and transmit FIFO, use 10/100 Mbps MII */
- *get_eth_reg_addr (NS9750_ETH_EGCR1) =
- NS9750_ETH_EGCR1_ETXWM |
- NS9750_ETH_EGCR1_ERX |
- NS9750_ETH_EGCR1_ERXDMA |
- NS9750_ETH_EGCR1_ETX |
- NS9750_ETH_EGCR1_ETXDMA | NS9750_ETH_EGCR1_ITXA;
-
- /* prepare DMA descriptors */
- for (i = 0; i < 4; i++) {
- aRxBufferDesc[i].punSrc = 0;
- aRxBufferDesc[i].unLen = 0;
- aRxBufferDesc[i].s.bits.uWrap = 1;
- aRxBufferDesc[i].s.bits.uInt = 1;
- aRxBufferDesc[i].s.bits.uEnable = 0;
- aRxBufferDesc[i].s.bits.uFull = 0;
- }
-
- /* NetRxPackets[ 0 ] is initialized before eth_init is called and never
- changes. NetRxPackets is 32bit aligned */
- aRxBufferDesc[0].punSrc = (unsigned int *) NetRxPackets[0];
- aRxBufferDesc[0].s.bits.uEnable = 1;
- aRxBufferDesc[0].unLen = 1522; /* as stated in [1] p.307 */
-
- *get_eth_reg_addr (NS9750_ETH_RXAPTR) =
- (unsigned int) &aRxBufferDesc[0];
-
- /* [1] Tab. 221 states less than 5us */
- *get_eth_reg_addr (NS9750_ETH_EGCR1) |= NS9750_ETH_EGCR1_ERXINIT;
- while (!
- (*get_eth_reg_addr (NS9750_ETH_EGSR) & NS9750_ETH_EGSR_RXINIT))
- /* wait for finish */
- udelay (1);
-
- /* @TODO do we need to clear RXINIT? */
- *get_eth_reg_addr (NS9750_ETH_EGCR1) &= ~NS9750_ETH_EGCR1_ERXINIT;
-
- *get_eth_reg_addr (NS9750_ETH_RXFREE) = 0x1;
-
- return 0;
-}
-
-/***********************************************************************
- * @Function: eth_send
- * @Return: -1 on timeout otherwise 1
- * @Descr: sends one frame by DMA
- ***********************************************************************/
-
-int eth_send (volatile void *pPacket, int nLen)
-{
- ulong ulTimeout;
-
- DEBUG_FN (DEBUG_TX);
-
- /* clear old status values */
- *get_eth_reg_addr (NS9750_ETH_EINTR) &=
- *get_eth_reg_addr (NS9750_ETH_EINTR) & NS9750_ETH_EINTR_TX_MA;
-
- /* prepare Tx Descriptors */
-
- pTxBufferDesc->punSrc = (unsigned int *) pPacket; /* pPacket is 32bit
- * aligned */
- pTxBufferDesc->unLen = nLen;
- /* only 32bit accesses allowed. wrap, full, interrupt and enabled to 1 */
- pTxBufferDesc->s.unReg = 0xf0000000;
- /* pTxBufferDesc is the first possible buffer descriptor */
- *get_eth_reg_addr (NS9750_ETH_TXPTR) = 0x0;
-
- /* enable processor for next frame */
-
- *get_eth_reg_addr (NS9750_ETH_EGCR2) &= ~NS9750_ETH_EGCR2_TCLER;
- *get_eth_reg_addr (NS9750_ETH_EGCR2) |= NS9750_ETH_EGCR2_TCLER;
-
- ulTimeout = get_timer (0);
-
- DEBUG_ARGS0 (DEBUG_TX | DEBUG_MINOR,
- "Waiting for transmission to finish\n");
- while (!
- (*get_eth_reg_addr (NS9750_ETH_EINTR) &
- (NS9750_ETH_EINTR_TXDONE | NS9750_ETH_EINTR_TXERR))) {
- /* do nothing, wait for completion */
- if (get_timer (0) - ulTimeout > TX_TIMEOUT) {
- DEBUG_ARGS0 (DEBUG_TX, "Transmit Timed out\n");
- return -1;
- }
- }
- DEBUG_ARGS0 (DEBUG_TX | DEBUG_MINOR, "transmitted...\n");
-
- return 0;
-}
-
-/***********************************************************************
- * @Function: eth_rx
- * @Return: size of last frame in bytes or 0 if no frame available
- * @Descr: gives one frame to U-Boot which has been copied by DMA engine already
- * to NetRxPackets[ 0 ].
- ***********************************************************************/
-
-int eth_rx (void)
-{
- int nLen = 0;
- unsigned int unStatus;
-
- unStatus =
- *get_eth_reg_addr (NS9750_ETH_EINTR) & NS9750_ETH_EINTR_RX_MA;
-
- if (!unStatus)
- /* no packet available, return immediately */
- return 0;
-
- DEBUG_FN (DEBUG_RX);
-
- /* unLen always < max(nLen) and discard checksum */
- nLen = (int) aRxBufferDesc[0].unLen - 4;
-
- /* acknowledge status register */
- *get_eth_reg_addr (NS9750_ETH_EINTR) = unStatus;
-
- aRxBufferDesc[0].unLen = 1522;
- aRxBufferDesc[0].s.bits.uFull = 0;
-
- /* Buffer A descriptor available again */
- *get_eth_reg_addr (NS9750_ETH_RXFREE) |= 0x1;
-
- /* NetReceive may call eth_send. Due to a possible bug of the NS9750 we
- * have to acknowledge the received frame before sending a new one */
- if (unStatus & NS9750_ETH_EINTR_RXDONEA)
- NetReceive (NetRxPackets[0], nLen);
-
- return nLen;
-}
-
-/***********************************************************************
- * @Function: eth_halt
- * @Return: n/a
- * @Descr: stops the ethernet engine
- ***********************************************************************/
-
-void eth_halt (void)
-{
- DEBUG_FN (DEBUG_INIT);
-
- *get_eth_reg_addr (NS9750_ETH_MAC1) &= ~NS9750_ETH_MAC1_RXEN;
- *get_eth_reg_addr (NS9750_ETH_EGCR1) &= ~(NS9750_ETH_EGCR1_ERX |
- NS9750_ETH_EGCR1_ERXDMA |
- NS9750_ETH_EGCR1_ETX |
- NS9750_ETH_EGCR1_ETXDMA);
-}
-
-/***********************************************************************
- * @Function: ns9750_eth_reset
- * @Return: 0 on failure otherwise 1
- * @Descr: resets the ethernet interface and the PHY,
- * performs auto negotiation or fixed modes
- ***********************************************************************/
-
-static int ns9750_eth_reset (void)
-{
- DEBUG_FN (DEBUG_MINOR);
-
- /* Reset MAC */
- *get_eth_reg_addr (NS9750_ETH_EGCR1) |= NS9750_ETH_EGCR1_MAC_HRST;
- udelay (5); /* according to [1], p.322 */
- *get_eth_reg_addr (NS9750_ETH_EGCR1) &= ~NS9750_ETH_EGCR1_MAC_HRST;
-
- /* reset and initialize PHY */
-
- *get_eth_reg_addr (NS9750_ETH_MAC1) &= ~NS9750_ETH_MAC1_SRST;
-
- /* we don't support hot plugging of PHY, therefore we don't reset
- phyDetected and nPhyMaxMdioClock here. The risk is if the setting is
- incorrect the first open
- may detect the PHY correctly but succeding will fail
- For reseting the PHY and identifying we have to use the standard
- MDIO CLOCK value 2.5 MHz only after hardware reset
- After having identified the PHY we will do faster */
-
- *get_eth_reg_addr (NS9750_ETH_MCFG) =
- ns9750_mii_get_clock_divisor (nPhyMaxMdioClock);
-
- /* reset PHY */
- ns9750_mii_write(MII_BMCR, BMCR_RESET);
- ns9750_mii_write(MII_BMCR, 0);
-
- /* @TODO check time */
- udelay (3000); /* [2] p.70 says at least 300us reset recovery time. But
- go sure, it didn't worked stable at higher timer
- frequencies under LxNETES-2.x */
-
- /* MII clock has been setup to default, ns9750_mii_identify_phy should
- work for all */
-
- if (!ns9750_mii_identify_phy ()) {
- printk (KERN_ERR NS9750_DRIVER_NAME
- ": Unsupported PHY, aborting\n");
- return 0;
- }
-
- /* now take the highest MDIO clock possible after detection */
- *get_eth_reg_addr (NS9750_ETH_MCFG) =
- ns9750_mii_get_clock_divisor (nPhyMaxMdioClock);
-
-
- /* PHY has been detected, so there can be no abort reason and we can
- finish initializing ethernet */
-
- uiLastLinkStatus = 0xff; /* undefined */
-
- if ((ucLinkMode & FS_EEPROM_AUTONEG_ENABLE_MASK) ==
- FS_EEPROM_AUTONEG_DISABLE)
- /* use parameters defined */
- ns9750_link_force ();
- else
- ns9750_link_auto_negotiate ();
-
- if (phyDetected == PHY_LXT971A)
- /* set LED2 to link mode */
- ns9750_mii_write (PHY_LXT971_LED_CFG,
- PHY_LXT971_LED_CFG_LINK_ACT <<
- PHY_LXT971_LED_CFG_SHIFT_LED2);
-
- return 1;
-}
-
-/***********************************************************************
- * @Function: ns9750_link_force
- * @Return: void
- * @Descr: configures eth and MII to use the link mode defined in
- * ucLinkMode
- ***********************************************************************/
-
-static void ns9750_link_force (void)
-{
- unsigned short uiControl;
-
- DEBUG_FN (DEBUG_LINK);
-
- uiControl = ns9750_mii_read(MII_BMCR);
- uiControl &= ~(BMCR_SPEED1000 | BMCR_SPEED100 |
- BMCR_ANENABLE | BMCR_FULLDPLX);
-
- uiLastLinkStatus = 0;
-
- if ((ucLinkMode & FS_EEPROM_AUTONEG_SPEED_MASK) ==
- FS_EEPROM_AUTONEG_SPEED_100) {
- uiControl |= BMCR_SPEED100;
- uiLastLinkStatus |= PHY_LXT971_STAT2_100BTX;
- }
-
- if ((ucLinkMode & FS_EEPROM_AUTONEG_DUPLEX_MASK) ==
- FS_EEPROM_AUTONEG_DUPLEX_FULL) {
- uiControl |= BMCR_FULLDPLX;
- uiLastLinkStatus |= PHY_LXT971_STAT2_DUPLEX_MODE;
- }
-
- ns9750_mii_write(MII_BMCR, uiControl);
-
- ns9750_link_print_changed ();
- ns9750_link_update_egcr ();
-}
-
-/***********************************************************************
- * @Function: ns9750_link_auto_negotiate
- * @Return: void
- * @Descr: performs auto-negotation of link.
- ***********************************************************************/
-
-static void ns9750_link_auto_negotiate (void)
-{
- unsigned long ulStartJiffies;
- unsigned short uiStatus;
-
- DEBUG_FN (DEBUG_LINK);
-
- /* run auto-negotation */
- /* define what we are capable of */
- ns9750_mii_write(MII_ADVERTISE,
- LPA_100FULL |
- LPA_100HALF |
- LPA_10FULL |
- LPA_10HALF |
- PHY_ANLPAR_PSB_802_3);
- /* start auto-negotiation */
- ns9750_mii_write(MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART);
-
- /* wait for completion */
-
- ulStartJiffies = get_ticks ();
- while (get_ticks () < ulStartJiffies + NS9750_MII_NEG_DELAY) {
- uiStatus = ns9750_mii_read(MII_BMSR);
- if ((uiStatus &
- (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) ==
- (BMSR_ANEGCOMPLETE | BMSR_LSTATUS)) {
- /* lucky we are, auto-negotiation succeeded */
- ns9750_link_print_changed ();
- ns9750_link_update_egcr ();
- return;
- }
- }
-
- DEBUG_ARGS0 (DEBUG_LINK, "auto-negotiation timed out\n");
- /* ignore invalid link settings */
-}
-
-/***********************************************************************
- * @Function: ns9750_link_update_egcr
- * @Return: void
- * @Descr: updates the EGCR and MAC2 link status after mode change or
- * auto-negotation
- ***********************************************************************/
-
-static void ns9750_link_update_egcr (void)
-{
- unsigned int unEGCR;
- unsigned int unMAC2;
- unsigned int unIPGT;
-
- DEBUG_FN (DEBUG_LINK);
-
- unEGCR = *get_eth_reg_addr (NS9750_ETH_EGCR1);
- unMAC2 = *get_eth_reg_addr (NS9750_ETH_MAC2);
- unIPGT = *get_eth_reg_addr (NS9750_ETH_IPGT) & ~NS9750_ETH_IPGT_MA;
-
- unMAC2 &= ~NS9750_ETH_MAC2_FULLD;
- if ((uiLastLinkStatus & PHY_LXT971_STAT2_DUPLEX_MODE)
- == PHY_LXT971_STAT2_DUPLEX_MODE) {
- unMAC2 |= NS9750_ETH_MAC2_FULLD;
- unIPGT |= 0x15; /* see [1] p. 339 */
- } else
- unIPGT |= 0x12; /* see [1] p. 339 */
-
- *get_eth_reg_addr (NS9750_ETH_MAC2) = unMAC2;
- *get_eth_reg_addr (NS9750_ETH_EGCR1) = unEGCR;
- *get_eth_reg_addr (NS9750_ETH_IPGT) = unIPGT;
-}
-
-/***********************************************************************
- * @Function: ns9750_link_print_changed
- * @Return: void
- * @Descr: checks whether the link status has changed and if so prints
- * the new mode
- ***********************************************************************/
-
-static void ns9750_link_print_changed (void)
-{
- unsigned short uiStatus;
- unsigned short uiControl;
-
- DEBUG_FN (DEBUG_LINK);
-
- uiControl = ns9750_mii_read(MII_BMCR);
-
- if ((uiControl & BMCR_ANENABLE) == BMCR_ANENABLE) {
- /* BMSR_LSTATUS is only set on autonegotiation */
- uiStatus = ns9750_mii_read(MII_BMSR);
-
- if (!(uiStatus & BMSR_LSTATUS)) {
- printk (KERN_WARNING NS9750_DRIVER_NAME
- ": link down\n");
- /* @TODO Linux: carrier_off */
- } else {
- /* @TODO Linux: carrier_on */
- if (phyDetected == PHY_LXT971A) {
- uiStatus = ns9750_mii_read (PHY_LXT971_STAT2);
- uiStatus &= (PHY_LXT971_STAT2_100BTX |
- PHY_LXT971_STAT2_DUPLEX_MODE |
- PHY_LXT971_STAT2_AUTO_NEG);
-
- /* mask out all uninteresting parts */
- }
- /* other PHYs must store their link information in
- uiStatus as PHY_LXT971 */
- }
- } else {
- /* mode has been forced, so uiStatus should be the same as the
- last link status, enforce printing */
- uiStatus = uiLastLinkStatus;
- uiLastLinkStatus = 0xff;
- }
-
- if (uiStatus != uiLastLinkStatus) {
- /* save current link status */
- uiLastLinkStatus = uiStatus;
-
- /* print new link status */
-
- printk (KERN_INFO NS9750_DRIVER_NAME
- ": link mode %i Mbps %s duplex %s\n",
- (uiStatus & PHY_LXT971_STAT2_100BTX) ? 100 : 10,
- (uiStatus & PHY_LXT971_STAT2_DUPLEX_MODE) ? "full" :
- "half",
- (uiStatus & PHY_LXT971_STAT2_AUTO_NEG) ? "(auto)" :
- "");
- }
-}
-
-/***********************************************************************
- * the MII low level stuff
- ***********************************************************************/
-
-/***********************************************************************
- * @Function: ns9750_mii_identify_phy
- * @Return: 1 if supported PHY has been detected otherwise 0
- * @Descr: checks for supported PHY and prints the IDs.
- ***********************************************************************/
-
-static char ns9750_mii_identify_phy (void)
-{
- unsigned short uiID1;
- unsigned short uiID2;
- unsigned char *szName;
- char cRes = 0;
-
- DEBUG_FN (DEBUG_MII);
-
- phyDetected = (PhyType) uiID1 = ns9750_mii_read(MII_PHYSID1);
-
- switch (phyDetected) {
- case PHY_LXT971A:
- szName = "LXT971A";
- uiID2 = ns9750_mii_read(MII_PHYSID2);
- nPhyMaxMdioClock = PHY_LXT971_MDIO_MAX_CLK;
- cRes = 1;
- break;
- case PHY_NONE:
- default:
- /* in case uiID1 == 0 && uiID2 == 0 we may have the wrong
- address or reset sets the wrong NS9750_ETH_MCFG_CLKS */
-
- uiID2 = 0;
- szName = "unknown";
- nPhyMaxMdioClock = PHY_MDIO_MAX_CLK;
- phyDetected = PHY_NONE;
- }
-
- printk (KERN_INFO NS9750_DRIVER_NAME
- ": PHY (0x%x, 0x%x) = %s detected\n", uiID1, uiID2, szName);
-
- return cRes;
-}
-
-/***********************************************************************
- * @Function: ns9750_mii_read
- * @Return: the data read from PHY register uiRegister
- * @Descr: the data read may be invalid if timed out. If so, a message
- * is printed but the invalid data is returned.
- * The fixed device address is being used.
- ***********************************************************************/
-
-static unsigned short ns9750_mii_read (unsigned short uiRegister)
-{
- DEBUG_FN (DEBUG_MII_LOW);
-
- /* write MII register to be read */
- *get_eth_reg_addr (NS9750_ETH_MADR) =
- NS9750_ETH_PHY_ADDRESS << 8 | uiRegister;
-
- *get_eth_reg_addr (NS9750_ETH_MCMD) = NS9750_ETH_MCMD_READ;
-
- if (!ns9750_mii_poll_busy ())
- printk (KERN_WARNING NS9750_DRIVER_NAME
- ": MII still busy in read\n");
- /* continue to read */
-
- *get_eth_reg_addr (NS9750_ETH_MCMD) = 0;
-
- return (unsigned short) (*get_eth_reg_addr (NS9750_ETH_MRDD));
-}
-
-
-/***********************************************************************
- * @Function: ns9750_mii_write
- * @Return: nothing
- * @Descr: writes the data to the PHY register. In case of a timeout,
- * no special handling is performed but a message printed
- * The fixed device address is being used.
- ***********************************************************************/
-
-static void ns9750_mii_write (unsigned short uiRegister,
- unsigned short uiData)
-{
- DEBUG_FN (DEBUG_MII_LOW);
-
- /* write MII register to be written */
- *get_eth_reg_addr (NS9750_ETH_MADR) =
- NS9750_ETH_PHY_ADDRESS << 8 | uiRegister;
-
- *get_eth_reg_addr (NS9750_ETH_MWTD) = uiData;
-
- if (!ns9750_mii_poll_busy ()) {
- printf (KERN_WARNING NS9750_DRIVER_NAME
- ": MII still busy in write\n");
- }
-}
-
-
-/***********************************************************************
- * @Function: ns9750_mii_get_clock_divisor
- * @Return: the clock divisor that should be used in NS9750_ETH_MCFG_CLKS
- * @Descr: if no clock divisor can be calculated for the
- * current SYSCLK and the maximum MDIO Clock, a warning is printed
- * and the greatest divisor is taken
- ***********************************************************************/
-
-static unsigned int ns9750_mii_get_clock_divisor (unsigned int unMaxMDIOClk)
-{
- struct {
- unsigned int unSysClkDivisor;
- unsigned int unClks; /* field for NS9750_ETH_MCFG_CLKS */
- } PHYClockDivisors[] = {
- {
- 4, NS9750_ETH_MCFG_CLKS_4}, {
- 6, NS9750_ETH_MCFG_CLKS_6}, {
- 8, NS9750_ETH_MCFG_CLKS_8}, {
- 10, NS9750_ETH_MCFG_CLKS_10}, {
- 20, NS9750_ETH_MCFG_CLKS_20}, {
- 30, NS9750_ETH_MCFG_CLKS_30}, {
- 40, NS9750_ETH_MCFG_CLKS_40}
- };
-
- int nIndexSysClkDiv;
- int nArraySize =
- sizeof (PHYClockDivisors) / sizeof (PHYClockDivisors[0]);
- unsigned int unClks = NS9750_ETH_MCFG_CLKS_40; /* defaults to
- greatest div */
-
- DEBUG_FN (DEBUG_INIT);
-
- for (nIndexSysClkDiv = 0; nIndexSysClkDiv < nArraySize;
- nIndexSysClkDiv++) {
- /* find first sysclock divisor that isn't higher than 2.5 MHz
- clock */
- if (AHB_CLK_FREQ /
- PHYClockDivisors[nIndexSysClkDiv].unSysClkDivisor <=
- unMaxMDIOClk) {
- unClks = PHYClockDivisors[nIndexSysClkDiv].unClks;
- break;
- }
- }
-
- DEBUG_ARGS2 (DEBUG_INIT,
- "Taking MDIO Clock bit mask 0x%0x for max clock %i\n",
- unClks, unMaxMDIOClk);
-
- /* return greatest divisor */
- return unClks;
-}
-
-/***********************************************************************
- * @Function: ns9750_mii_poll_busy
- * @Return: 0 if timed out otherwise the remaing timeout
- * @Descr: waits until the MII has completed a command or it times out
- * code may be interrupted by hard interrupts.
- * It is not checked what happens on multiple actions when
- * the first is still being busy and we timeout.
- ***********************************************************************/
-
-static unsigned int ns9750_mii_poll_busy (void)
-{
- unsigned int unTimeout = 10000;
-
- DEBUG_FN (DEBUG_MII_LOW);
-
- while (((*get_eth_reg_addr (NS9750_ETH_MIND) & NS9750_ETH_MIND_BUSY)
- == NS9750_ETH_MIND_BUSY) && unTimeout)
- unTimeout--;
-
- return unTimeout;
-}
+++ /dev/null
-/***********************************************************************
- *
- * Copyright (C) 2004 by FS Forth-Systeme GmbH.
- * All rights reserved.
- *
- * $Id: ns9750_eth.h,v 1.2 2004/02/24 13:25:39 mpietrek Exp $
- * @Author: Markus Pietrek
- * @References: [1] NS9750 Hardware Reference, December 2003
- * [2] Intel LXT971 Datasheet #249414 Rev. 02
- * [3] NS7520 Linux Ethernet Driver
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that 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
- *
- ***********************************************************************/
-
-#ifndef FS_NS9750_ETH_H
-#define FS_NS9750_ETH_H
-
-#ifdef CONFIG_DRIVER_NS9750_ETHERNET
-
-#include <miiphy.h>
-#include "lxt971a.h"
-
-#define NS9750_ETH_MODULE_BASE (0xA0600000)
-
-#define get_eth_reg_addr(c) \
- ((volatile unsigned int*) ( NS9750_ETH_MODULE_BASE+(unsigned int) (c)))
-
-#define NS9750_ETH_EGCR1 (0x0000)
-#define NS9750_ETH_EGCR2 (0x0004)
-#define NS9750_ETH_EGSR (0x0008)
-#define NS9750_ETH_FIFORX (0x000C)
-#define NS9750_ETH_FIFOTX (0x0010)
-#define NS9750_ETH_FIFOTXS (0x0014)
-#define NS9750_ETH_ETSR (0x0018)
-#define NS9750_ETH_ERSR (0x001C)
-#define NS9750_ETH_MAC1 (0x0400)
-#define NS9750_ETH_MAC2 (0x0404)
-#define NS9750_ETH_IPGT (0x0408)
-#define NS9750_ETH_IPGR (0x040C)
-#define NS9750_ETH_CLRT (0x0410)
-#define NS9750_ETH_MAXF (0x0414)
-#define NS9750_ETH_SUPP (0x0418)
-#define NS9750_ETH_TEST (0x041C)
-#define NS9750_ETH_MCFG (0x0420)
-#define NS9750_ETH_MCMD (0x0424)
-#define NS9750_ETH_MADR (0x0428)
-#define NS9750_ETH_MWTD (0x042C)
-#define NS9750_ETH_MRDD (0x0430)
-#define NS9750_ETH_MIND (0x0434)
-#define NS9750_ETH_SA1 (0x0440)
-#define NS9750_ETH_SA2 (0x0444)
-#define NS9750_ETH_SA3 (0x0448)
-#define NS9750_ETH_SAFR (0x0500)
-#define NS9750_ETH_HT1 (0x0504)
-#define NS9750_ETH_HT2 (0x0508)
-#define NS9750_ETH_STAT_BASE (0x0680)
-#define NS9750_ETH_RXAPTR (0x0A00)
-#define NS9750_ETH_RXBPTR (0x0A04)
-#define NS9750_ETH_RXCPTR (0x0A08)
-#define NS9750_ETH_RXDPTR (0x0A0C)
-#define NS9750_ETH_EINTR (0x0A10)
-#define NS9750_ETH_EINTREN (0x0A14)
-#define NS9750_ETH_TXPTR (0x0A18)
-#define NS9750_ETH_TXRPTR (0x0A1C)
-#define NS9750_ETH_TXERBD (0x0A20)
-#define NS9750_ETH_TXSPTR (0x0A24)
-#define NS9750_ETH_RXAOFF (0x0A28)
-#define NS9750_ETH_RXBOFF (0x0A2C)
-#define NS9750_ETH_RXCOFF (0x0A30)
-#define NS9750_ETH_RXDOFF (0x0A34)
-#define NS9750_ETH_TXOFF (0x0A38)
-#define NS9750_ETH_RXFREE (0x0A3C)
-#define NS9750_ETH_TXBD (0x1000)
-
-/* register bit fields */
-
-#define NS9750_ETH_EGCR1_ERX (0x80000000)
-#define NS9750_ETH_EGCR1_ERXDMA (0x40000000)
-#define NS9750_ETH_EGCR1_ERXSHT (0x10000000)
-#define NS9750_ETH_EGCR1_ERXSIZ (0x08000000)
-#define NS9750_ETH_EGCR1_ETXSIZ (0x04000000)
-#define NS9750_ETH_EGCR1_ETXDIAG (0x02000000)
-#define NS9750_ETH_EGCR1_ERXBAD (0x01000000)
-#define NS9750_ETH_EGCR1_ETX (0x00800000)
-#define NS9750_ETH_EGCR1_ETXDMA (0x00400000)
-#define NS9750_ETH_EGCR1_ETXWM (0x00200000)
-#define NS9750_ETH_EGCR1_ERXADV (0x00100000)
-#define NS9750_ETH_EGCR1_ERXINIT (0x00080000)
-#define NS9750_ETH_EGCR1_PHY_MODE_MA (0x0000C000)
-#define NS9750_ETH_EGCR1_PHY_MODE_MII (0x00008000)
-#define NS9750_ETH_EGCR1_PHY_MODE_RMII (0x00004000)
-#define NS9750_ETH_EGCR1_RXCINV (0x00001000)
-#define NS9750_ETH_EGCR1_TXCINV (0x00000800)
-#define NS9750_ETH_EGCR1_RXALIGN (0x00000400)
-#define NS9750_ETH_EGCR1_MAC_HRST (0x00000200)
-#define NS9750_ETH_EGCR1_ITXA (0x00000100)
-
-#define NS9750_ETH_EGCR2_TPTV_MA (0xFFFF0000)
-#define NS9750_ETH_EGCR2_TPCF (0x00000040)
-#define NS9750_ETH_EGCR2_THPDF (0x00000020)
-#define NS9750_ETH_EGCR2_TCLER (0x00000008)
-#define NS9750_ETH_EGCR2_AUTOZ (0x00000004)
-#define NS9750_ETH_EGCR2_CLRCNT (0x00000002)
-#define NS9750_ETH_EGCR2_STEN (0x00000001)
-
-#define NS9750_ETH_EGSR_RXINIT (0x00100000)
-#define NS9750_ETH_EGSR_TXFIFONF (0x00080000)
-#define NS9750_ETH_EGSR_TXFIFOH (0x00040000)
-#define NS9750_ETH_EGSR_TXFIFOE (0x00010000)
-
-#define NS9750_ETH_FIFOTXS_ALL (0x00000055)
-#define NS9750_ETH_FIFOTXS_3 (0x000000d5)
-#define NS9750_ETH_FIFOTXS_2 (0x00000035)
-#define NS9750_ETH_FIFOTXS_1 (0x0000000D)
-#define NS9750_ETH_FIFOTXS_0 (0x00000003)
-
-#define NS9750_ETH_ETSR_TXOK (0x00008000)
-#define NS9750_ETH_ETSR_TXBR (0x00004000)
-#define NS9750_ETH_ETSR_TXMC (0x00002000)
-#define NS9750_ETH_ETSR_TXAL (0x00001000)
-#define NS9750_ETH_ETSR_TXAED (0x00000800)
-#define NS9750_ETH_ETSR_TXAEC (0x00000400)
-#define NS9750_ETH_ETSR_TXAUR (0x00000200)
-#define NS9750_ETH_ETSR_TXAJ (0x00000100)
-#define NS9750_ETH_ETSR_TXDEF (0x00000040)
-#define NS9750_ETH_ETSR_TXCRC (0x00000020)
-#define NS9750_ETH_ETSR_TXCOLC (0x0000000F)
-
-#define NS9750_ETH_ERSR_RXSIZE_MA (0x0FFF0000)
-#define NS9750_ETH_ERSR_RXCE (0x00008000)
-#define NS9750_ETH_ERSR_RXDV (0x00004000)
-#define NS9750_ETH_ERSR_RXOK (0x00002000)
-#define NS9750_ETH_ERSR_RXBR (0x00001000)
-#define NS9750_ETH_ERSR_RXMC (0x00000800)
-#define NS9750_ETH_ERSR_RXCRC (0x00000400)
-#define NS9750_ETH_ERSR_RXDR (0x00000200)
-#define NS9750_ETH_ERSR_RXCV (0x00000100)
-#define NS9750_ETH_ERSR_RXSHT (0x00000040)
-
-#define NS9750_ETH_MAC1_SRST (0x00008000)
-#define NS9750_ETH_MAC1_SIMMRST (0x00004000)
-#define NS9750_ETH_MAC1_RPEMCSR (0x00000800)
-#define NS9750_ETH_MAC1_RPERFUN (0x00000400)
-#define NS9750_ETH_MAC1_RPEMCST (0x00000200)
-#define NS9750_ETH_MAC1_RPETFUN (0x00000100)
-#define NS9750_ETH_MAC1_LOOPBK (0x00000010)
-#define NS9750_ETH_MAC1_TXFLOW (0x00000008)
-#define NS9750_ETH_MAC1_RXFLOW (0x00000004)
-#define NS9750_ETH_MAC1_PALLRX (0x00000002)
-#define NS9750_ETH_MAC1_RXEN (0x00000001)
-
-#define NS9750_ETH_MAC2_EDEFER (0x00004000)
-#define NS9750_ETH_MAC2_BACKP (0x00002000)
-#define NS9750_ETH_MAC2_NOBO (0x00001000)
-#define NS9750_ETH_MAC2_LONGP (0x00000200)
-#define NS9750_ETH_MAC2_PUREP (0x00000100)
-#define NS9750_ETH_MAC2_AUTOP (0x00000080)
-#define NS9750_ETH_MAC2_VLANP (0x00000040)
-#define NS9750_ETH_MAC2_PADEN (0x00000020)
-#define NS9750_ETH_MAC2_CRCEN (0x00000010)
-#define NS9750_ETH_MAC2_DELCRC (0x00000008)
-#define NS9750_ETH_MAC2_HUGE (0x00000004)
-#define NS9750_ETH_MAC2_FLENC (0x00000002)
-#define NS9750_ETH_MAC2_FULLD (0x00000001)
-
-#define NS9750_ETH_IPGT_MA (0x0000007F)
-
-#define NS9750_ETH_IPGR_IPGR1 (0x00007F00)
-#define NS9750_ETH_IPGR_IPGR2 (0x0000007F)
-
-#define NS9750_ETH_CLRT_CWIN (0x00003F00)
-#define NS9750_ETH_CLRT_RETX (0x0000000F)
-
-#define NS9750_ETH_MAXF_MAXF (0x0000FFFF)
-
-#define NS9750_ETH_SUPP_RPERMII (0x00008000)
-#define NS9750_ETH_SUPP_SPEED (0x00000080)
-
-#define NS9750_ETH_TEST_TBACK (0x00000004)
-#define NS9750_ETH_TEST_TPAUSE (0x00000002)
-#define NS9750_ETH_TEST_SPQ (0x00000001)
-
-#define NS9750_ETH_MCFG_RMIIM (0x00008000)
-#define NS9750_ETH_MCFG_CLKS_MA (0x0000001C)
-#define NS9750_ETH_MCFG_CLKS_4 (0x00000004)
-#define NS9750_ETH_MCFG_CLKS_6 (0x00000008)
-#define NS9750_ETH_MCFG_CLKS_8 (0x0000000C)
-#define NS9750_ETH_MCFG_CLKS_10 (0x00000010)
-#define NS9750_ETH_MCFG_CLKS_20 (0x00000014)
-#define NS9750_ETH_MCFG_CLKS_30 (0x00000018)
-#define NS9750_ETH_MCFG_CLKS_40 (0x0000001C)
-#define NS9750_ETH_MCFG_SPRE (0x00000002)
-#define NS9750_ETH_MCFG_SCANI (0x00000001)
-
-#define NS9750_ETH_MCMD_SCAN (0x00000002)
-#define NS9750_ETH_MCMD_READ (0x00000001)
-
-#define NS9750_ETH_MADR_DADR_MA (0x00001F00)
-#define NS9750_ETH_MADR_RADR_MA (0x0000001F)
-
-#define NS9750_ETH_MWTD_MA (0x0000FFFF)
-
-#define NS9750_ETH_MRRD_MA (0x0000FFFF)
-
-#define NS9750_ETH_MIND_MIILF (0x00000008)
-#define NS9750_ETH_MIND_NVALID (0x00000004)
-#define NS9750_ETH_MIND_SCAN (0x00000002)
-#define NS9750_ETH_MIND_BUSY (0x00000001)
-
-#define NS9750_ETH_SA1_OCTET1_MA (0x0000FF00)
-#define NS9750_ETH_SA1_OCTET2_MA (0x000000FF)
-
-#define NS9750_ETH_SA2_OCTET3_MA (0x0000FF00)
-#define NS9750_ETH_SA2_OCTET4_MA (0x000000FF)
-
-#define NS9750_ETH_SA3_OCTET5_MA (0x0000FF00)
-#define NS9750_ETH_SA3_OCTET6_MA (0x000000FF)
-
-#define NS9750_ETH_SAFR_PRO (0x00000008)
-#define NS9750_ETH_SAFR_PRM (0x00000004)
-#define NS9750_ETH_SAFR_PRA (0x00000002)
-#define NS9750_ETH_SAFR_BROAD (0x00000001)
-
-#define NS9750_ETH_HT1_MA (0x0000FFFF)
-
-#define NS9750_ETH_HT2_MA (0x0000FFFF)
-
-/* also valid for EINTREN */
-#define NS9750_ETH_EINTR_RXOVL_DATA (0x02000000)
-#define NS9750_ETH_EINTR_RXOVL_STAT (0x01000000)
-#define NS9750_ETH_EINTR_RXBUFC (0x00800000)
-#define NS9750_ETH_EINTR_RXDONEA (0x00400000)
-#define NS9750_ETH_EINTR_RXDONEB (0x00200000)
-#define NS9750_ETH_EINTR_RXDONEC (0x00100000)
-#define NS9750_ETH_EINTR_RXDONED (0x00080000)
-#define NS9750_ETH_EINTR_RXNOBUF (0x00040000)
-#define NS9750_ETH_EINTR_RXBUFFUL (0x00020000)
-#define NS9750_ETH_EINTR_RXBR (0x00010000)
-#define NS9750_ETH_EINTR_STOVFL (0x00000040)
-#define NS9750_ETH_EINTR_TXPAUSE (0x00000020)
-#define NS9750_ETH_EINTR_TXBUFC (0x00000010)
-#define NS9750_ETH_EINTR_TXBUFNR (0x00000008)
-#define NS9750_ETH_EINTR_TXDONE (0x00000004)
-#define NS9750_ETH_EINTR_TXERR (0x00000002)
-#define NS9750_ETH_EINTR_TXIDLE (0x00000001)
-#define NS9750_ETH_EINTR_RX_MA \
- (NS9750_ETH_EINTR_RXOVL_DATA | \
- NS9750_ETH_EINTR_RXOVL_STAT | \
- NS9750_ETH_EINTR_RXBUFC | \
- NS9750_ETH_EINTR_RXDONEA | \
- NS9750_ETH_EINTR_RXDONEB | \
- NS9750_ETH_EINTR_RXDONEC | \
- NS9750_ETH_EINTR_RXDONED | \
- NS9750_ETH_EINTR_RXNOBUF | \
- NS9750_ETH_EINTR_RXBUFFUL | \
- NS9750_ETH_EINTR_RXBR )
-#define NS9750_ETH_EINTR_TX_MA \
- (NS9750_ETH_EINTR_TXPAUSE | \
- NS9750_ETH_EINTR_TXBUFC | \
- NS9750_ETH_EINTR_TXBUFNR | \
- NS9750_ETH_EINTR_TXDONE | \
- NS9750_ETH_EINTR_TXERR | \
- NS9750_ETH_EINTR_TXIDLE)
-
-/* for TXPTR, TXRPTR, TXERBD and TXSPTR */
-#define NS9750_ETH_TXPTR_MA (0x000000FF)
-
-/* for RXAOFF, RXBOFF, RXCOFF and RXDOFF */
-#define NS9750_ETH_RXOFF_MA (0x000007FF)
-
-#define NS9750_ETH_TXOFF_MA (0x000003FF)
-
-#define NS9750_ETH_RXFREE_D (0x00000008)
-#define NS9750_ETH_RXFREE_C (0x00000004)
-#define NS9750_ETH_RXFREE_B (0x00000002)
-#define NS9750_ETH_RXFREE_A (0x00000001)
-
-#ifndef NS9750_ETH_PHY_ADDRESS
-# define NS9750_ETH_PHY_ADDRESS (0x0001) /* suitable for UNC20 */
-#endif /* NETARM_ETH_PHY_ADDRESS */
-
-#endif /* CONFIG_DRIVER_NS9750_ETHERNET */
-
-#endif /* FS_NS9750_ETH_H */
projects / karo-tx-uboot.git / commitdiff