Initial revision
diff --git a/drivers/smc91111.c b/drivers/smc91111.c
new file mode 100644
index 0000000..62d2133
--- /dev/null
+++ b/drivers/smc91111.c
@@ -0,0 +1,1383 @@
+/*------------------------------------------------------------------------
+ . smc91111.c
+ . This is a driver for SMSC's 91C111 single-chip Ethernet device.
+ .
+ . (C) Copyright 2002
+ . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ . Rolf Offermanns <rof@sysgo.de>
+ .
+ . Copyright (C) 2001 Standard Microsystems Corporation (SMSC)
+ . Developed by Simple Network Magic Corporation (SNMC)
+ . Copyright (C) 1996 by Erik Stahlman (ES)
+ .
+ . 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
+ .
+ . Information contained in this file was obtained from the LAN91C111
+ . manual from SMC. To get a copy, if you really want one, you can find
+ . information under www.smsc.com.
+ .
+ .
+ . "Features" of the SMC chip:
+ . Integrated PHY/MAC for 10/100BaseT Operation
+ . Supports internal and external MII
+ . Integrated 8K packet memory
+ . EEPROM interface for configuration
+ .
+ . Arguments:
+ . io = for the base address
+ . irq = for the IRQ
+ .
+ . author:
+ . Erik Stahlman ( erik@vt.edu )
+ . Daris A Nevil ( dnevil@snmc.com )
+ .
+ .
+ . Hardware multicast code from Peter Cammaert ( pc@denkart.be )
+ .
+ . Sources:
+ . o SMSC LAN91C111 databook (www.smsc.com)
+ . o smc9194.c by Erik Stahlman
+ . o skeleton.c by Donald Becker ( becker@cesdis.gsfc.nasa.gov )
+ .
+ . History:
+ . 10/17/01 Marco Hasewinkel Modify for DNP/1110
+ . 07/25/01 Woojung Huh Modify for ADS Bitsy
+ . 04/25/01 Daris A Nevil Initial public release through SMSC
+ . 03/16/01 Daris A Nevil Modified smc9194.c for use with LAN91C111
+ ----------------------------------------------------------------------------*/
+
+#include <common.h>
+#include <command.h>
+#include "smc91111.h"
+#include <net.h>
+
+#ifdef CONFIG_DRIVER_SMC91111
+
+/* Use power-down feature of the chip */
+#define POWER_DOWN 0
+
+#define NO_AUTOPROBE
+
+static const char version[] =
+ "smc91111.c:v1.0 04/25/01 by Daris A Nevil (dnevil@snmc.com)\n";
+
+#define SMC_DEBUG 0
+
+/*------------------------------------------------------------------------
+ .
+ . Configuration options, for the experienced user to change.
+ .
+ -------------------------------------------------------------------------*/
+
+/*
+ . Wait time for memory to be free. This probably shouldn't be
+ . tuned that much, as waiting for this means nothing else happens
+ . in the system
+*/
+#define MEMORY_WAIT_TIME 16
+
+
+#if (SMC_DEBUG > 2 )
+#define PRINTK3(args...) printf(args)
+#else
+#define PRINTK3(args...)
+#endif
+
+#if SMC_DEBUG > 1
+#define PRINTK2(args...) printf(args)
+#else
+#define PRINTK2(args...)
+#endif
+
+#ifdef SMC_DEBUG
+#define PRINTK(args...) printf(args)
+#else
+#define PRINTK(args...)
+#endif
+
+
+/*------------------------------------------------------------------------
+ .
+ . The internal workings of the driver. If you are changing anything
+ . here with the SMC stuff, you should have the datasheet and know
+ . what you are doing.
+ .
+ -------------------------------------------------------------------------*/
+#define CARDNAME "LAN91C111"
+
+/* Memory sizing constant */
+#define LAN91C111_MEMORY_MULTIPLIER (1024*2)
+
+#ifndef CONFIG_SMC91111_BASE
+#define CONFIG_SMC91111_BASE 0x20000300
+#endif
+
+#define SMC_BASE_ADDRESS CONFIG_SMC91111_BASE
+
+#define SMC_DEV_NAME "SMC91111"
+#define SMC_PHY_ADDR 0x0000
+#define SMC_ALLOC_MAX_TRY 5
+#define SMC_TX_TIMEOUT 30
+
+#define SMC_PHY_CLOCK_DELAY 1000
+
+#define ETH_ZLEN 60
+
+#ifdef CONFIG_SMC_USE_32_BIT
+#define USE_32_BIT 1
+#else
+#undef USE_32_BIT
+#endif
+/*-----------------------------------------------------------------
+ .
+ . The driver can be entered at any of the following entry points.
+ .
+ .------------------------------------------------------------------ */
+
+extern int eth_init(bd_t *bd);
+extern void eth_halt(void);
+extern int eth_rx(void);
+extern int eth_send(volatile void *packet, int length);
+
+
+
+
+
+/*
+ . This is called by register_netdev(). It is responsible for
+ . checking the portlist for the SMC9000 series chipset. If it finds
+ . one, then it will initialize the device, find the hardware information,
+ . and sets up the appropriate device parameters.
+ . NOTE: Interrupts are *OFF* when this procedure is called.
+ .
+ . NB:This shouldn't be static since it is referred to externally.
+*/
+int smc_init(void);
+
+/*
+ . This is called by unregister_netdev(). It is responsible for
+ . cleaning up before the driver is finally unregistered and discarded.
+*/
+void smc_destructor(void);
+
+/*
+ . The kernel calls this function when someone wants to use the device,
+ . typically 'ifconfig ethX up'.
+*/
+static int smc_open(void);
+
+
+/*
+ . This is called by the kernel in response to 'ifconfig ethX down'. It
+ . is responsible for cleaning up everything that the open routine
+ . does, and maybe putting the card into a powerdown state.
+*/
+static int smc_close(void);
+
+/*
+ . Configures the PHY through the MII Management interface
+*/
+#ifndef CONFIG_SMC91111_EXT_PHY
+static void smc_phy_configure(void);
+#endif /* !CONFIG_SMC91111_EXT_PHY */
+
+/*
+ . This is a separate procedure to handle the receipt of a packet, to
+ . leave the interrupt code looking slightly cleaner
+*/
+static int smc_rcv(void);
+
+
+
+/*
+ ------------------------------------------------------------
+ .
+ . Internal routines
+ .
+ ------------------------------------------------------------
+*/
+
+static char smc_mac_addr[] = {0x02, 0x80, 0xad, 0x20, 0x31, 0xb8};
+
+/*
+ * This function must be called before smc_open() if you want to override
+ * the default mac address.
+ */
+
+void smc_set_mac_addr(const char *addr) {
+ int i;
+
+ for (i=0; i < sizeof(smc_mac_addr); i++){
+ smc_mac_addr[i] = addr[i];
+ }
+}
+
+/*
+ * smc_get_macaddr is no longer used. If you want to override the default
+ * mac address, call smc_get_mac_addr as a part of the board initialisation.
+ */
+
+#if 0
+void smc_get_macaddr( byte *addr ) {
+ /* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */
+ unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010);
+ int i;
+
+
+ for (i=0; i<6; i++) {
+ addr[0] = *(dnp1110_mac+0);
+ addr[1] = *(dnp1110_mac+1);
+ addr[2] = *(dnp1110_mac+2);
+ addr[3] = *(dnp1110_mac+3);
+ addr[4] = *(dnp1110_mac+4);
+ addr[5] = *(dnp1110_mac+5);
+ }
+}
+#endif /* 0 */
+
+/***********************************************
+ * Show available memory *
+ ***********************************************/
+void dump_memory_info(void)
+{
+ word mem_info;
+ word old_bank;
+
+ old_bank = SMC_inw(BANK_SELECT)&0xF;
+
+ SMC_SELECT_BANK(0);
+ mem_info = SMC_inw( MIR_REG );
+ PRINTK2("Memory: %4d available\n", (mem_info >> 8)*2048);
+
+ SMC_SELECT_BANK(old_bank);
+}
+/*
+ . A rather simple routine to print out a packet for debugging purposes.
+*/
+#if SMC_DEBUG > 2
+static void print_packet( byte *, int );
+#endif
+
+#define tx_done(dev) 1
+
+
+
+/* this does a soft reset on the device */
+static void smc_reset( void );
+
+/* Enable Interrupts, Receive, and Transmit */
+static void smc_enable( void );
+
+/* this puts the device in an inactive state */
+static void smc_shutdown( void );
+
+/* Routines to Read and Write the PHY Registers across the
+ MII Management Interface
+*/
+
+#ifndef CONFIG_SMC91111_EXT_PHY
+static word smc_read_phy_register(byte phyreg);
+static void smc_write_phy_register(byte phyreg, word phydata);
+#endif /* !CONFIG_SMC91111_EXT_PHY */
+
+
+static int poll4int( byte mask, int timeout ) {
+ int tmo = get_timer(0) + timeout * CFG_HZ;
+ int is_timeout = 0;
+ word old_bank = SMC_inw(BSR_REG);
+
+ PRINTK2("Polling...\n");
+ SMC_SELECT_BANK(2);
+ while((SMC_inw(SMC91111_INT_REG) & mask) == 0)
+ {
+ if (get_timer(0) >= tmo) {
+ is_timeout = 1;
+ break;
+ }
+ }
+
+ /* restore old bank selection */
+ SMC_SELECT_BANK(old_bank);
+
+ if (is_timeout)
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ . Function: smc_reset( void )
+ . Purpose:
+ . This sets the SMC91111 chip to its normal state, hopefully from whatever
+ . mess that any other DOS driver has put it in.
+ .
+ . Maybe I should reset more registers to defaults in here? SOFTRST should
+ . do that for me.
+ .
+ . Method:
+ . 1. send a SOFT RESET
+ . 2. wait for it to finish
+ . 3. enable autorelease mode
+ . 4. reset the memory management unit
+ . 5. clear all interrupts
+ .
+*/
+static void smc_reset( void )
+{
+ PRINTK2("%s:smc_reset\n", SMC_DEV_NAME);
+
+ /* This resets the registers mostly to defaults, but doesn't
+ affect EEPROM. That seems unnecessary */
+ SMC_SELECT_BANK( 0 );
+ SMC_outw( RCR_SOFTRST, RCR_REG );
+
+ /* Setup the Configuration Register */
+ /* This is necessary because the CONFIG_REG is not affected */
+ /* by a soft reset */
+
+ SMC_SELECT_BANK( 1 );
+#if defined(CONFIG_SMC91111_EXT_PHY)
+ SMC_outw( CONFIG_DEFAULT | CONFIG_EXT_PHY, CONFIG_REG);
+#else
+ SMC_outw( CONFIG_DEFAULT, CONFIG_REG);
+#endif
+
+
+ /* Release from possible power-down state */
+ /* Configuration register is not affected by Soft Reset */
+ SMC_outw( SMC_inw( CONFIG_REG ) | CONFIG_EPH_POWER_EN, CONFIG_REG );
+
+ SMC_SELECT_BANK( 0 );
+
+ /* this should pause enough for the chip to be happy */
+ udelay(10);
+
+ /* Disable transmit and receive functionality */
+ SMC_outw( RCR_CLEAR, RCR_REG );
+ SMC_outw( TCR_CLEAR, TCR_REG );
+
+ /* set the control register */
+ SMC_SELECT_BANK( 1 );
+ SMC_outw( CTL_DEFAULT, CTL_REG );
+
+ /* Reset the MMU */
+ SMC_SELECT_BANK( 2 );
+ SMC_outw( MC_RESET, MMU_CMD_REG );
+ while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
+ udelay(1); /* Wait until not busy */
+
+ /* Note: It doesn't seem that waiting for the MMU busy is needed here,
+ but this is a place where future chipsets _COULD_ break. Be wary
+ of issuing another MMU command right after this */
+
+ /* Disable all interrupts */
+ SMC_outb( 0, IM_REG );
+}
+
+/*
+ . Function: smc_enable
+ . Purpose: let the chip talk to the outside work
+ . Method:
+ . 1. Enable the transmitter
+ . 2. Enable the receiver
+ . 3. Enable interrupts
+*/
+static void smc_enable()
+{
+ PRINTK2("%s:smc_enable\n", SMC_DEV_NAME);
+ SMC_SELECT_BANK( 0 );
+ /* see the header file for options in TCR/RCR DEFAULT*/
+ SMC_outw( TCR_DEFAULT, TCR_REG );
+ SMC_outw( RCR_DEFAULT, RCR_REG );
+
+ /* clear MII_DIS */
+/* smc_write_phy_register(PHY_CNTL_REG, 0x0000); */
+}
+
+/*
+ . Function: smc_shutdown
+ . Purpose: closes down the SMC91xxx chip.
+ . Method:
+ . 1. zero the interrupt mask
+ . 2. clear the enable receive flag
+ . 3. clear the enable xmit flags
+ .
+ . TODO:
+ . (1) maybe utilize power down mode.
+ . Why not yet? Because while the chip will go into power down mode,
+ . the manual says that it will wake up in response to any I/O requests
+ . in the register space. Empirical results do not show this working.
+*/
+static void smc_shutdown()
+{
+ PRINTK2(CARDNAME ":smc_shutdown\n");
+
+ /* no more interrupts for me */
+ SMC_SELECT_BANK( 2 );
+ SMC_outb( 0, IM_REG );
+
+ /* and tell the card to stay away from that nasty outside world */
+ SMC_SELECT_BANK( 0 );
+ SMC_outb( RCR_CLEAR, RCR_REG );
+ SMC_outb( TCR_CLEAR, TCR_REG );
+}
+
+
+/*
+ . Function: smc_hardware_send_packet(struct net_device * )
+ . Purpose:
+ . This sends the actual packet to the SMC9xxx chip.
+ .
+ . Algorithm:
+ . First, see if a saved_skb is available.
+ . ( this should NOT be called if there is no 'saved_skb'
+ . Now, find the packet number that the chip allocated
+ . Point the data pointers at it in memory
+ . Set the length word in the chip's memory
+ . Dump the packet to chip memory
+ . Check if a last byte is needed ( odd length packet )
+ . if so, set the control flag right
+ . Tell the card to send it
+ . Enable the transmit interrupt, so I know if it failed
+ . Free the kernel data if I actually sent it.
+*/
+static int smc_send_packet(volatile void *packet, int packet_length)
+{
+ byte packet_no;
+ unsigned long ioaddr;
+ byte * buf;
+ int length;
+ int numPages;
+ int try = 0;
+ int time_out;
+ byte status;
+
+
+ PRINTK3("%s:smc_hardware_send_packet\n", SMC_DEV_NAME);
+
+ length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;
+
+ /* allocate memory
+ ** The MMU wants the number of pages to be the number of 256 bytes
+ ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
+ **
+ ** The 91C111 ignores the size bits, but the code is left intact
+ ** for backwards and future compatibility.
+ **
+ ** Pkt size for allocating is data length +6 (for additional status
+ ** words, length and ctl!)
+ **
+ ** If odd size then last byte is included in this header.
+ */
+ numPages = ((length & 0xfffe) + 6);
+ numPages >>= 8; /* Divide by 256 */
+
+ if (numPages > 7 ) {
+ printf("%s: Far too big packet error. \n", SMC_DEV_NAME);
+ return 0;
+ }
+
+ /* now, try to allocate the memory */
+ SMC_SELECT_BANK( 2 );
+ SMC_outw( MC_ALLOC | numPages, MMU_CMD_REG );
+
+again:
+ try++;
+ time_out = MEMORY_WAIT_TIME;
+ do {
+ status = SMC_inb( SMC91111_INT_REG );
+ if ( status & IM_ALLOC_INT ) {
+ /* acknowledge the interrupt */
+ SMC_outb( IM_ALLOC_INT, SMC91111_INT_REG );
+ break;
+ }
+ } while ( -- time_out );
+
+ if ( !time_out ) {
+ PRINTK2("%s: memory allocation, try %d failed ...\n",
+ SMC_DEV_NAME, try);
+ if (try < SMC_ALLOC_MAX_TRY)
+ goto again;
+ else
+ return 0;
+ }
+
+ PRINTK2("%s: memory allocation, try %d succeeded ...\n",
+ SMC_DEV_NAME,
+ try);
+
+ /* I can send the packet now.. */
+
+ ioaddr = SMC_BASE_ADDRESS;
+
+ buf = (byte *)packet;
+
+ /* If I get here, I _know_ there is a packet slot waiting for me */
+ packet_no = SMC_inb( AR_REG );
+ if ( packet_no & AR_FAILED ) {
+ /* or isn't there? BAD CHIP! */
+ printf("%s: Memory allocation failed. \n",
+ SMC_DEV_NAME);
+ return 0;
+ }
+
+ /* we have a packet address, so tell the card to use it */
+ SMC_outb( packet_no, PN_REG );
+
+ /* point to the beginning of the packet */
+ SMC_outw( PTR_AUTOINC , PTR_REG );
+
+ PRINTK3("%s: Trying to xmit packet of length %x\n",
+ SMC_DEV_NAME, length);
+
+#if SMC_DEBUG > 2
+ printf("Transmitting Packet\n");
+ print_packet( buf, length );
+#endif
+
+ /* send the packet length ( +6 for status, length and ctl byte )
+ and the status word ( set to zeros ) */
+#ifdef USE_32_BIT
+ SMC_outl( (length +6 ) << 16 , SMC91111_DATA_REG );
+#else
+ SMC_outw( 0, SMC91111_DATA_REG );
+ /* send the packet length ( +6 for status words, length, and ctl*/
+ SMC_outw( (length+6), SMC91111_DATA_REG );
+#endif
+
+ /* send the actual data
+ . I _think_ it's faster to send the longs first, and then
+ . mop up by sending the last word. It depends heavily
+ . on alignment, at least on the 486. Maybe it would be
+ . a good idea to check which is optimal? But that could take
+ . almost as much time as is saved?
+ */
+#ifdef USE_32_BIT
+ SMC_outsl(SMC91111_DATA_REG, buf, length >> 2 );
+ if ( length & 0x2 )
+ SMC_outw(*((word *)(buf + (length & 0xFFFFFFFC))), SMC91111_DATA_REG);
+#else
+ SMC_outsw(SMC91111_DATA_REG , buf, (length ) >> 1);
+#endif /* USE_32_BIT */
+
+ /* Send the last byte, if there is one. */
+ if ( (length & 1) == 0 ) {
+ SMC_outw( 0, SMC91111_DATA_REG );
+ } else {
+ SMC_outw( buf[length -1 ] | 0x2000, SMC91111_DATA_REG );
+ }
+
+ /* and let the chipset deal with it */
+ SMC_outw( MC_ENQUEUE , MMU_CMD_REG );
+
+ /* poll for TX INT */
+ if (poll4int(IM_TX_INT, SMC_TX_TIMEOUT)) {
+ /* sending failed */
+ PRINTK2("%s: TX timeout, sending failed...\n",
+ SMC_DEV_NAME);
+
+ /* release packet */
+ SMC_outw(MC_FREEPKT, MMU_CMD_REG);
+
+ /* wait for MMU getting ready (low) */
+ while (SMC_inw(MMU_CMD_REG) & MC_BUSY)
+ {
+ udelay(10);
+ }
+
+ PRINTK2("MMU ready\n");
+
+
+ return 0;
+ } else {
+ /* ack. int */
+ SMC_outw(IM_TX_INT, SMC91111_INT_REG);
+ PRINTK2("%s: Sent packet of length %d \n", SMC_DEV_NAME, length);
+
+ /* release packet */
+ SMC_outw(MC_FREEPKT, MMU_CMD_REG);
+
+ /* wait for MMU getting ready (low) */
+ while (SMC_inw(MMU_CMD_REG) & MC_BUSY)
+ {
+ udelay(10);
+ }
+
+ PRINTK2("MMU ready\n");
+
+
+ }
+
+ return length;
+}
+
+/*-------------------------------------------------------------------------
+ |
+ | smc_destructor( struct net_device * dev )
+ | Input parameters:
+ | dev, pointer to the device structure
+ |
+ | Output:
+ | None.
+ |
+ ---------------------------------------------------------------------------
+*/
+void smc_destructor()
+{
+ PRINTK2(CARDNAME ":smc_destructor\n");
+}
+
+
+/*
+ * Open and Initialize the board
+ *
+ * Set up everything, reset the card, etc ..
+ *
+ */
+static int smc_open()
+{
+ int i; /* used to set hw ethernet address */
+
+ PRINTK2("%s:smc_open\n", SMC_DEV_NAME);
+
+ /* reset the hardware */
+
+ smc_reset();
+ smc_enable();
+
+ /* Configure the PHY */
+#ifndef CONFIG_SMC91111_EXT_PHY
+ smc_phy_configure();
+#endif
+
+
+ /* conservative setting (10Mbps, HalfDuplex, no AutoNeg.) */
+/* SMC_SELECT_BANK(0); */
+/* SMC_outw(0, RPC_REG); */
+
+#ifdef USE_32_BIT
+ for ( i = 0; i < 6; i += 2 ) {
+ word address;
+
+ address = smc_mac_addr[ i + 1 ] << 8 ;
+ address |= smc_mac_addr[ i ];
+ SMC_outw( address, ADDR0_REG + i );
+ }
+#else
+ for ( i = 0; i < 6; i ++ )
+ SMC_outb( smc_mac_addr[i], ADDR0_REG + i );
+#endif
+
+ return 0;
+}
+
+#if 0 /* dead code? -- wd */
+#ifdef USE_32_BIT
+void
+insl32(r,b,l)
+{
+ int __i ;
+ dword *__b2;
+
+ __b2 = (dword *) b;
+ for (__i = 0; __i < l; __i++) {
+ *(__b2 + __i) = *(dword *)(r+0x10000300);
+ }
+}
+#endif
+#endif
+
+/*-------------------------------------------------------------
+ .
+ . smc_rcv - receive a packet from the card
+ .
+ . There is ( at least ) a packet waiting to be read from
+ . chip-memory.
+ .
+ . o Read the status
+ . o If an error, record it
+ . o otherwise, read in the packet
+ --------------------------------------------------------------
+*/
+static int smc_rcv()
+{
+ int packet_number;
+ word status;
+ word packet_length;
+ int is_error = 0;
+#ifdef USE_32_BIT
+ dword stat_len;
+#endif
+
+
+ SMC_SELECT_BANK(2);
+ packet_number = SMC_inw( RXFIFO_REG );
+
+ if ( packet_number & RXFIFO_REMPTY ) {
+
+ return 0;
+ }
+
+ PRINTK3("%s:smc_rcv\n", SMC_DEV_NAME);
+ /* start reading from the start of the packet */
+ SMC_outw( PTR_READ | PTR_RCV | PTR_AUTOINC, PTR_REG );
+
+ /* First two words are status and packet_length */
+#ifdef USE_32_BIT
+ stat_len = SMC_inl(SMC91111_DATA_REG);
+ status = stat_len & 0xffff;
+ packet_length = stat_len >> 16;
+#else
+ status = SMC_inw( SMC91111_DATA_REG );
+ packet_length = SMC_inw( SMC91111_DATA_REG );
+#endif
+
+ packet_length &= 0x07ff; /* mask off top bits */
+
+ PRINTK2("RCV: STATUS %4x LENGTH %4x\n", status, packet_length );
+
+ if ( !(status & RS_ERRORS ) ){
+ /* Adjust for having already read the first two words */
+ packet_length -= 4; /*4; */
+
+
+
+ /* set odd length for bug in LAN91C111, */
+ /* which never sets RS_ODDFRAME */
+ /* TODO ? */
+
+
+#ifdef USE_32_BIT
+ PRINTK3(" Reading %d dwords (and %d bytes) \n",
+ packet_length >> 2, packet_length & 3 );
+ /* QUESTION: Like in the TX routine, do I want
+ to send the DWORDs or the bytes first, or some
+ mixture. A mixture might improve already slow PIO
+ performance */
+ SMC_insl( SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 2 );
+ /* read the left over bytes */
+ if (packet_length & 3) {
+ int i;
+
+ byte *tail = NetRxPackets[0] + (packet_length & ~3);
+ dword leftover = SMC_inl(SMC91111_DATA_REG);
+ for (i=0; i<(packet_length & 3); i++)
+ *tail++ = (byte) (leftover >> (8*i)) & 0xff;
+ }
+#else
+ PRINTK3(" Reading %d words and %d byte(s) \n",
+ (packet_length >> 1 ), packet_length & 1 );
+ SMC_insw(SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 1);
+
+#endif /* USE_32_BIT */
+
+#if SMC_DEBUG > 2
+ printf("Receiving Packet\n");
+ print_packet( NetRxPackets[0], packet_length );
+#endif
+ } else {
+ /* error ... */
+ /* TODO ? */
+ is_error = 1;
+ }
+
+ while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
+ udelay(1); /* Wait until not busy */
+
+ /* error or good, tell the card to get rid of this packet */
+ SMC_outw( MC_RELEASE, MMU_CMD_REG );
+
+ while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
+ udelay(1); /* Wait until not busy */
+
+ if (!is_error) {
+ /* Pass the packet up to the protocol layers. */
+ NetReceive(NetRxPackets[0], packet_length);
+ return packet_length;
+ } else {
+ return 0;
+ }
+
+}
+
+
+
+/*----------------------------------------------------
+ . smc_close
+ .
+ . this makes the board clean up everything that it can
+ . and not talk to the outside world. Caused by
+ . an 'ifconfig ethX down'
+ .
+ -----------------------------------------------------*/
+static int smc_close()
+{
+ PRINTK2("%s:smc_close\n", SMC_DEV_NAME);
+
+ /* clear everything */
+ smc_shutdown();
+
+ return 0;
+}
+
+
+#if 0
+/*------------------------------------------------------------
+ . Modify a bit in the LAN91C111 register set
+ .-------------------------------------------------------------*/
+static word smc_modify_regbit(int bank, int ioaddr, int reg,
+ unsigned int bit, int val)
+{
+ word regval;
+
+ SMC_SELECT_BANK( bank );
+
+ regval = SMC_inw( reg );
+ if (val)
+ regval |= bit;
+ else
+ regval &= ~bit;
+
+ SMC_outw( regval, 0 );
+ return(regval);
+}
+
+
+/*------------------------------------------------------------
+ . Retrieve a bit in the LAN91C111 register set
+ .-------------------------------------------------------------*/
+static int smc_get_regbit(int bank, int ioaddr, int reg, unsigned int bit)
+{
+ SMC_SELECT_BANK( bank );
+ if ( SMC_inw( reg ) & bit)
+ return(1);
+ else
+ return(0);
+}
+
+
+/*------------------------------------------------------------
+ . Modify a LAN91C111 register (word access only)
+ .-------------------------------------------------------------*/
+static void smc_modify_reg(int bank, int ioaddr, int reg, word val)
+{
+ SMC_SELECT_BANK( bank );
+ SMC_outw( val, reg );
+}
+
+
+/*------------------------------------------------------------
+ . Retrieve a LAN91C111 register (word access only)
+ .-------------------------------------------------------------*/
+static int smc_get_reg(int bank, int ioaddr, int reg)
+{
+ SMC_SELECT_BANK( bank );
+ return(SMC_inw( reg ));
+}
+
+#endif /* 0 */
+
+/*---PHY CONTROL AND CONFIGURATION----------------------------------------- */
+
+#if (SMC_DEBUG > 2 )
+
+/*------------------------------------------------------------
+ . Debugging function for viewing MII Management serial bitstream
+ .-------------------------------------------------------------*/
+static void smc_dump_mii_stream(byte* bits, int size)
+{
+ int i;
+
+ printf("BIT#:");
+ for (i = 0; i < size; ++i)
+ {
+ printf("%d", i%10);
+ }
+
+ printf("\nMDOE:");
+ for (i = 0; i < size; ++i)
+ {
+ if (bits[i] & MII_MDOE)
+ printf("1");
+ else
+ printf("0");
+ }
+
+ printf("\nMDO :");
+ for (i = 0; i < size; ++i)
+ {
+ if (bits[i] & MII_MDO)
+ printf("1");
+ else
+ printf("0");
+ }
+
+ printf("\nMDI :");
+ for (i = 0; i < size; ++i)
+ {
+ if (bits[i] & MII_MDI)
+ printf("1");
+ else
+ printf("0");
+ }
+
+ printf("\n");
+}
+#endif
+
+/*------------------------------------------------------------
+ . Reads a register from the MII Management serial interface
+ .-------------------------------------------------------------*/
+#ifndef CONFIG_SMC91111_EXT_PHY
+static word smc_read_phy_register(byte phyreg)
+{
+ int oldBank;
+ int i;
+ byte mask;
+ word mii_reg;
+ byte bits[64];
+ int clk_idx = 0;
+ int input_idx;
+ word phydata;
+ byte phyaddr = SMC_PHY_ADDR;
+
+ /* 32 consecutive ones on MDO to establish sync */
+ for (i = 0; i < 32; ++i)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+
+ /* Start code <01> */
+ bits[clk_idx++] = MII_MDOE;
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+
+ /* Read command <10> */
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Output the PHY address, msb first */
+ mask = (byte)0x10;
+ for (i = 0; i < 5; ++i)
+ {
+ if (phyaddr & mask)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ else
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Shift to next lowest bit */
+ mask >>= 1;
+ }
+
+ /* Output the phy register number, msb first */
+ mask = (byte)0x10;
+ for (i = 0; i < 5; ++i)
+ {
+ if (phyreg & mask)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ else
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Shift to next lowest bit */
+ mask >>= 1;
+ }
+
+ /* Tristate and turnaround (2 bit times) */
+ bits[clk_idx++] = 0;
+ /*bits[clk_idx++] = 0; */
+
+ /* Input starts at this bit time */
+ input_idx = clk_idx;
+
+ /* Will input 16 bits */
+ for (i = 0; i < 16; ++i)
+ bits[clk_idx++] = 0;
+
+ /* Final clock bit */
+ bits[clk_idx++] = 0;
+
+ /* Save the current bank */
+ oldBank = SMC_inw( BANK_SELECT );
+
+ /* Select bank 3 */
+ SMC_SELECT_BANK( 3 );
+
+ /* Get the current MII register value */
+ mii_reg = SMC_inw( MII_REG );
+
+ /* Turn off all MII Interface bits */
+ mii_reg &= ~(MII_MDOE|MII_MCLK|MII_MDI|MII_MDO);
+
+ /* Clock all 64 cycles */
+ for (i = 0; i < sizeof bits; ++i)
+ {
+ /* Clock Low - output data */
+ SMC_outw( mii_reg | bits[i], MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+
+
+ /* Clock Hi - input data */
+ SMC_outw( mii_reg | bits[i] | MII_MCLK, MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+ bits[i] |= SMC_inw( MII_REG ) & MII_MDI;
+ }
+
+ /* Return to idle state */
+ /* Set clock to low, data to low, and output tristated */
+ SMC_outw( mii_reg, MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+
+ /* Restore original bank select */
+ SMC_SELECT_BANK( oldBank );
+
+ /* Recover input data */
+ phydata = 0;
+ for (i = 0; i < 16; ++i)
+ {
+ phydata <<= 1;
+
+ if (bits[input_idx++] & MII_MDI)
+ phydata |= 0x0001;
+ }
+
+#if (SMC_DEBUG > 2 )
+ printf("smc_read_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
+ phyaddr, phyreg, phydata);
+ smc_dump_mii_stream(bits, sizeof bits);
+#endif
+
+ return(phydata);
+}
+
+
+/*------------------------------------------------------------
+ . Writes a register to the MII Management serial interface
+ .-------------------------------------------------------------*/
+static void smc_write_phy_register(byte phyreg, word phydata)
+{
+ int oldBank;
+ int i;
+ word mask;
+ word mii_reg;
+ byte bits[65];
+ int clk_idx = 0;
+ byte phyaddr = SMC_PHY_ADDR;
+
+ /* 32 consecutive ones on MDO to establish sync */
+ for (i = 0; i < 32; ++i)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+
+ /* Start code <01> */
+ bits[clk_idx++] = MII_MDOE;
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+
+ /* Write command <01> */
+ bits[clk_idx++] = MII_MDOE;
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+
+ /* Output the PHY address, msb first */
+ mask = (byte)0x10;
+ for (i = 0; i < 5; ++i)
+ {
+ if (phyaddr & mask)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ else
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Shift to next lowest bit */
+ mask >>= 1;
+ }
+
+ /* Output the phy register number, msb first */
+ mask = (byte)0x10;
+ for (i = 0; i < 5; ++i)
+ {
+ if (phyreg & mask)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ else
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Shift to next lowest bit */
+ mask >>= 1;
+ }
+
+ /* Tristate and turnaround (2 bit times) */
+ bits[clk_idx++] = 0;
+ bits[clk_idx++] = 0;
+
+ /* Write out 16 bits of data, msb first */
+ mask = 0x8000;
+ for (i = 0; i < 16; ++i)
+ {
+ if (phydata & mask)
+ bits[clk_idx++] = MII_MDOE | MII_MDO;
+ else
+ bits[clk_idx++] = MII_MDOE;
+
+ /* Shift to next lowest bit */
+ mask >>= 1;
+ }
+
+ /* Final clock bit (tristate) */
+ bits[clk_idx++] = 0;
+
+ /* Save the current bank */
+ oldBank = SMC_inw( BANK_SELECT );
+
+ /* Select bank 3 */
+ SMC_SELECT_BANK( 3 );
+
+ /* Get the current MII register value */
+ mii_reg = SMC_inw( MII_REG );
+
+ /* Turn off all MII Interface bits */
+ mii_reg &= ~(MII_MDOE|MII_MCLK|MII_MDI|MII_MDO);
+
+ /* Clock all cycles */
+ for (i = 0; i < sizeof bits; ++i)
+ {
+ /* Clock Low - output data */
+ SMC_outw( mii_reg | bits[i], MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+
+
+ /* Clock Hi - input data */
+ SMC_outw( mii_reg | bits[i] | MII_MCLK, MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+ bits[i] |= SMC_inw( MII_REG ) & MII_MDI;
+ }
+
+ /* Return to idle state */
+ /* Set clock to low, data to low, and output tristated */
+ SMC_outw( mii_reg, MII_REG );
+ udelay(SMC_PHY_CLOCK_DELAY);
+
+ /* Restore original bank select */
+ SMC_SELECT_BANK( oldBank );
+
+#if (SMC_DEBUG > 2 )
+ printf("smc_write_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
+ phyaddr, phyreg, phydata);
+ smc_dump_mii_stream(bits, sizeof bits);
+#endif
+}
+#endif /* !CONFIG_SMC91111_EXT_PHY */
+
+
+
+/*------------------------------------------------------------
+ . Waits the specified number of milliseconds - kernel friendly
+ .-------------------------------------------------------------*/
+#ifndef CONFIG_SMC91111_EXT_PHY
+static void smc_wait_ms(unsigned int ms)
+{
+ udelay(ms*1000);
+}
+#endif /* !CONFIG_SMC91111_EXT_PHY */
+
+
+
+/*------------------------------------------------------------
+ . Configures the specified PHY using Autonegotiation. Calls
+ . smc_phy_fixed() if the user has requested a certain config.
+ .-------------------------------------------------------------*/
+#ifndef CONFIG_SMC91111_EXT_PHY
+static void smc_phy_configure()
+{
+ int timeout;
+ byte phyaddr;
+ word my_phy_caps; /* My PHY capabilities */
+ word my_ad_caps; /* My Advertised capabilities */
+ word status = 0; /*;my status = 0 */
+ int failed = 0;
+
+ PRINTK3("%s:smc_program_phy()\n", SMC_DEV_NAME);
+
+
+
+ /* Get the detected phy address */
+ phyaddr = SMC_PHY_ADDR;
+
+ /* Reset the PHY, setting all other bits to zero */
+ smc_write_phy_register(PHY_CNTL_REG, PHY_CNTL_RST);
+
+ /* Wait for the reset to complete, or time out */
+ timeout = 6; /* Wait up to 3 seconds */
+ while (timeout--)
+ {
+ if (!(smc_read_phy_register(PHY_CNTL_REG)
+ & PHY_CNTL_RST))
+ {
+ /* reset complete */
+ break;
+ }
+
+ smc_wait_ms(500); /* wait 500 millisecs */
+ }
+
+ if (timeout < 1)
+ {
+ printf("%s:PHY reset timed out\n", SMC_DEV_NAME);
+ goto smc_phy_configure_exit;
+ }
+
+ /* Read PHY Register 18, Status Output */
+ /* lp->lastPhy18 = smc_read_phy_register(PHY_INT_REG); */
+
+ /* Enable PHY Interrupts (for register 18) */
+ /* Interrupts listed here are disabled */
+ smc_write_phy_register(PHY_INT_REG, 0xffff);
+
+ /* Configure the Receive/Phy Control register */
+ SMC_SELECT_BANK( 0 );
+ SMC_outw( RPC_DEFAULT, RPC_REG );
+
+ /* Copy our capabilities from PHY_STAT_REG to PHY_AD_REG */
+ my_phy_caps = smc_read_phy_register(PHY_STAT_REG);
+ my_ad_caps = PHY_AD_CSMA; /* I am CSMA capable */
+
+ if (my_phy_caps & PHY_STAT_CAP_T4)
+ my_ad_caps |= PHY_AD_T4;
+
+ if (my_phy_caps & PHY_STAT_CAP_TXF)
+ my_ad_caps |= PHY_AD_TX_FDX;
+
+ if (my_phy_caps & PHY_STAT_CAP_TXH)
+ my_ad_caps |= PHY_AD_TX_HDX;
+
+ if (my_phy_caps & PHY_STAT_CAP_TF)
+ my_ad_caps |= PHY_AD_10_FDX;
+
+ if (my_phy_caps & PHY_STAT_CAP_TH)
+ my_ad_caps |= PHY_AD_10_HDX;
+
+ /* Update our Auto-Neg Advertisement Register */
+ smc_write_phy_register( PHY_AD_REG, my_ad_caps);
+
+ PRINTK2("%s:phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
+ PRINTK2("%s:phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);
+
+ /* Restart auto-negotiation process in order to advertise my caps */
+ smc_write_phy_register( PHY_CNTL_REG,
+ PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST );
+
+ /* Wait for the auto-negotiation to complete. This may take from */
+ /* 2 to 3 seconds. */
+ /* Wait for the reset to complete, or time out */
+ timeout = 20; /* Wait up to 10 seconds */
+ while (timeout--)
+ {
+ status = smc_read_phy_register( PHY_STAT_REG);
+ if (status & PHY_STAT_ANEG_ACK)
+ {
+ /* auto-negotiate complete */
+ break;
+ }
+
+ smc_wait_ms(500); /* wait 500 millisecs */
+
+ /* Restart auto-negotiation if remote fault */
+ if (status & PHY_STAT_REM_FLT)
+ {
+ printf("%s:PHY remote fault detected\n", SMC_DEV_NAME);
+
+ /* Restart auto-negotiation */
+ printf("%s:PHY restarting auto-negotiation\n",
+ SMC_DEV_NAME);
+ smc_write_phy_register( PHY_CNTL_REG,
+ PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST |
+ PHY_CNTL_SPEED | PHY_CNTL_DPLX);
+ }
+ }
+
+ if (timeout < 1)
+ {
+ printf("%s:PHY auto-negotiate timed out\n",
+ SMC_DEV_NAME);
+ printf("%s:PHY auto-negotiate timed out\n", SMC_DEV_NAME);
+ failed = 1;
+ }
+
+ /* Fail if we detected an auto-negotiate remote fault */
+ if (status & PHY_STAT_REM_FLT)
+ {
+ printf( "%s:PHY remote fault detected\n", SMC_DEV_NAME);
+ printf("%s:PHY remote fault detected\n", SMC_DEV_NAME);
+ failed = 1;
+ }
+
+ /* Re-Configure the Receive/Phy Control register */
+ SMC_outw( RPC_DEFAULT, RPC_REG );
+
+ smc_phy_configure_exit:
+
+}
+#endif /* !CONFIG_SMC91111_EXT_PHY */
+
+
+#if SMC_DEBUG > 2
+static void print_packet( byte * buf, int length )
+{
+#if 0
+ int i;
+ int remainder;
+ int lines;
+
+ printf("Packet of length %d \n", length );
+
+#if SMC_DEBUG > 3
+ lines = length / 16;
+ remainder = length % 16;
+
+ for ( i = 0; i < lines ; i ++ ) {
+ int cur;
+
+ for ( cur = 0; cur < 8; cur ++ ) {
+ byte a, b;
+
+ a = *(buf ++ );
+ b = *(buf ++ );
+ printf("%02x%02x ", a, b );
+ }
+ printf("\n");
+ }
+ for ( i = 0; i < remainder/2 ; i++ ) {
+ byte a, b;
+
+ a = *(buf ++ );
+ b = *(buf ++ );
+ printf("%02x%02x ", a, b );
+ }
+ printf("\n");
+#endif
+#endif
+}
+#endif
+
+int eth_init(bd_t *bd) {
+ smc_open();
+ return 0;
+}
+
+void eth_halt() {
+ smc_close();
+}
+
+int eth_rx() {
+ return smc_rcv();
+}
+
+int eth_send(volatile void *packet, int length) {
+ return smc_send_packet(packet, length);
+}
+
+#endif /* CONFIG_DRIVER_SMC91111 */
