1 /*------------------------------------------------------------------------
3 . This is a driver for SMSC's 91C111 single-chip Ethernet device.
6 . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
9 . Copyright (C) 2001 Standard Microsystems Corporation (SMSC)
10 . Developed by Simple Network Magic Corporation (SNMC)
11 . Copyright (C) 1996 by Erik Stahlman (ES)
13 . This program is free software; you can redistribute it and/or modify
14 . it under the terms of the GNU General Public License as published by
15 . the Free Software Foundation; either version 2 of the License, or
16 . (at your option) any later version.
18 . This program is distributed in the hope that it will be useful,
19 . but WITHOUT ANY WARRANTY; without even the implied warranty of
20 . MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 . GNU General Public License for more details.
23 . You should have received a copy of the GNU General Public License
24 . along with this program; if not, write to the Free Software
25 . Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 . Information contained in this file was obtained from the LAN91C111
28 . manual from SMC. To get a copy, if you really want one, you can find
29 . information under www.smsc.com.
32 . "Features" of the SMC chip:
33 . Integrated PHY/MAC for 10/100BaseT Operation
34 . Supports internal and external MII
35 . Integrated 8K packet memory
36 . EEPROM interface for configuration
39 . io = for the base address
50 . o SMSC LAN91C111 databook (www.smsc.com)
51 . o smc9194.c by Erik Stahlman
55 . 06/19/03 Richard Woodruff Made u-boot environment aware and added mac addr checks.
56 . 10/17/01 Marco Hasewinkel Modify for DNP/1110
57 . 07/25/01 Woojung Huh Modify for ADS Bitsy
58 . 04/25/01 Daris A Nevil Initial public release through SMSC
59 . 03/16/01 Daris A Nevil Modified smc9194.c for use with LAN91C111
60 ----------------------------------------------------------------------------*/
68 #ifdef CONFIG_DRIVER_SMC91111
70 /* Use power-down feature of the chip */
78 static const char version[] =
82 /* Autonegotiation timeout in seconds */
83 #ifndef CONFIG_SMC_AUTONEG_TIMEOUT
84 #define CONFIG_SMC_AUTONEG_TIMEOUT 10
87 /*------------------------------------------------------------------------
89 . Configuration options, for the experienced user to change.
91 -------------------------------------------------------------------------*/
94 . Wait time for memory to be free. This probably shouldn't be
95 . tuned that much, as waiting for this means nothing else happens
98 #define MEMORY_WAIT_TIME 16
102 #define PRINTK3(args...) printf(args)
104 #define PRINTK3(args...)
108 #define PRINTK2(args...) printf(args)
110 #define PRINTK2(args...)
114 #define PRINTK(args...) printf(args)
116 #define PRINTK(args...)
120 /*------------------------------------------------------------------------
122 . The internal workings of the driver. If you are changing anything
123 . here with the SMC stuff, you should have the datasheet and know
124 . what you are doing.
126 -------------------------------------------------------------------------*/
127 #define CARDNAME "LAN91C111"
129 /* Memory sizing constant */
130 #define LAN91C111_MEMORY_MULTIPLIER (1024*2)
132 #ifndef CONFIG_SMC91111_BASE
133 #define CONFIG_SMC91111_BASE 0x20000300
136 #define SMC_BASE_ADDRESS CONFIG_SMC91111_BASE
138 #define SMC_DEV_NAME "SMC91111"
139 #define SMC_PHY_ADDR 0x0000
140 #define SMC_ALLOC_MAX_TRY 5
141 #define SMC_TX_TIMEOUT 30
143 #define SMC_PHY_CLOCK_DELAY 1000
147 #ifdef CONFIG_SMC_USE_32_BIT
152 /*-----------------------------------------------------------------
154 . The driver can be entered at any of the following entry points.
156 .------------------------------------------------------------------ */
158 extern int eth_init(bd_t *bd);
159 extern void eth_halt(void);
160 extern int eth_rx(void);
161 extern int eth_send(volatile void *packet, int length);
165 . This is called by register_netdev(). It is responsible for
166 . checking the portlist for the SMC9000 series chipset. If it finds
167 . one, then it will initialize the device, find the hardware information,
168 . and sets up the appropriate device parameters.
169 . NOTE: Interrupts are *OFF* when this procedure is called.
171 . NB:This shouldn't be static since it is referred to externally.
176 . This is called by unregister_netdev(). It is responsible for
177 . cleaning up before the driver is finally unregistered and discarded.
179 void smc_destructor(void);
182 . The kernel calls this function when someone wants to use the device,
183 . typically 'ifconfig ethX up'.
185 static int smc_open(bd_t *bd);
189 . This is called by the kernel in response to 'ifconfig ethX down'. It
190 . is responsible for cleaning up everything that the open routine
191 . does, and maybe putting the card into a powerdown state.
193 static int smc_close(void);
196 . Configures the PHY through the MII Management interface
198 #ifndef CONFIG_SMC91111_EXT_PHY
199 static void smc_phy_configure(void);
200 #endif /* !CONFIG_SMC91111_EXT_PHY */
203 . This is a separate procedure to handle the receipt of a packet, to
204 . leave the interrupt code looking slightly cleaner
206 static int smc_rcv(void);
208 /* See if a MAC address is defined in the current environment. If so use it. If not
209 . print a warning and set the environment and other globals with the default.
210 . If an EEPROM is present it really should be consulted.
212 int smc_get_ethaddr(bd_t *bd);
213 int get_rom_mac(char *v_rom_mac);
216 ------------------------------------------------------------
220 ------------------------------------------------------------
223 #ifdef CONFIG_SMC_USE_IOFUNCS
225 * input and output functions
227 * Implemented due to inx,outx macros accessing the device improperly
228 * and putting the device into an unkown state.
230 * For instance, on Sharp LPD7A400 SDK, affects were chip memory
231 * could not be free'd (hence the alloc failures), duplicate packets,
232 * packets being corrupt (shifted) on the wire, etc. Switching to the
233 * inx,outx functions fixed this problem.
235 static inline word SMC_inw(dword offset);
236 static inline void SMC_outw(word value, dword offset);
237 static inline byte SMC_inb(dword offset);
238 static inline void SMC_outb(byte value, dword offset);
239 static inline void SMC_insw(dword offset, volatile uchar* buf, dword len);
240 static inline void SMC_outsw(dword offset, uchar* buf, dword len);
242 #define barrier() __asm__ __volatile__("": : :"memory")
244 static inline word SMC_inw(dword offset)
247 v = *((volatile word*)(SMC_BASE_ADDRESS+offset));
248 barrier(); *(volatile u32*)(0xc0000000);
252 static inline void SMC_outw(word value, dword offset)
254 *((volatile word*)(SMC_BASE_ADDRESS+offset)) = value;
255 barrier(); *(volatile u32*)(0xc0000000);
258 static inline byte SMC_inb(dword offset)
262 _w = SMC_inw(offset & ~((dword)1));
263 return (offset & 1) ? (byte)(_w >> 8) : (byte)(_w);
266 static inline void SMC_outb(byte value, dword offset)
270 _w = SMC_inw(offset & ~((dword)1));
272 *((volatile word*)(SMC_BASE_ADDRESS+(offset & ~((dword)1)))) = (value<<8) | (_w & 0x00ff);
274 *((volatile word*)(SMC_BASE_ADDRESS+offset)) = value | (_w & 0xff00);
277 static inline void SMC_insw(dword offset, volatile uchar* buf, dword len)
280 *((word*)buf)++ = SMC_inw(offset);
281 barrier(); *((volatile u32*)(0xc0000000));
285 static inline void SMC_outsw(dword offset, uchar* buf, dword len)
288 SMC_outw(*((word*)buf)++, offset);
289 barrier(); *(volatile u32*)(0xc0000000);
292 #endif /* CONFIG_SMC_USE_IOFUNCS */
294 static char unsigned smc_mac_addr[6] = {0x02, 0x80, 0xad, 0x20, 0x31, 0xb8};
297 * This function must be called before smc_open() if you want to override
298 * the default mac address.
301 void smc_set_mac_addr(const char *addr) {
304 for (i=0; i < sizeof(smc_mac_addr); i++){
305 smc_mac_addr[i] = addr[i];
310 * smc_get_macaddr is no longer used. If you want to override the default
311 * mac address, call smc_get_mac_addr as a part of the board initialization.
315 void smc_get_macaddr( byte *addr ) {
316 /* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */
317 unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010);
321 for (i=0; i<6; i++) {
322 addr[0] = *(dnp1110_mac+0);
323 addr[1] = *(dnp1110_mac+1);
324 addr[2] = *(dnp1110_mac+2);
325 addr[3] = *(dnp1110_mac+3);
326 addr[4] = *(dnp1110_mac+4);
327 addr[5] = *(dnp1110_mac+5);
332 /***********************************************
333 * Show available memory *
334 ***********************************************/
335 void dump_memory_info(void)
340 old_bank = SMC_inw(BANK_SELECT)&0xF;
343 mem_info = SMC_inw( MIR_REG );
344 PRINTK2("Memory: %4d available\n", (mem_info >> 8)*2048);
346 SMC_SELECT_BANK(old_bank);
349 . A rather simple routine to print out a packet for debugging purposes.
352 static void print_packet( byte *, int );
355 #define tx_done(dev) 1
358 /* this does a soft reset on the device */
359 static void smc_reset( void );
361 /* Enable Interrupts, Receive, and Transmit */
362 static void smc_enable( void );
364 /* this puts the device in an inactive state */
365 static void smc_shutdown( void );
367 /* Routines to Read and Write the PHY Registers across the
368 MII Management Interface
371 #ifndef CONFIG_SMC91111_EXT_PHY
372 static word smc_read_phy_register(byte phyreg);
373 static void smc_write_phy_register(byte phyreg, word phydata);
374 #endif /* !CONFIG_SMC91111_EXT_PHY */
377 static int poll4int (byte mask, int timeout)
379 int tmo = get_timer (0) + timeout * CFG_HZ;
381 word old_bank = SMC_inw (BSR_REG);
383 PRINTK2 ("Polling...\n");
385 while ((SMC_inw (SMC91111_INT_REG) & mask) == 0) {
386 if (get_timer (0) >= tmo) {
392 /* restore old bank selection */
393 SMC_SELECT_BANK (old_bank);
401 /* Only one release command at a time, please */
402 static inline void smc_wait_mmu_release_complete (void)
406 /* assume bank 2 selected */
407 while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
408 udelay (1); /* Wait until not busy */
415 . Function: smc_reset( void )
417 . This sets the SMC91111 chip to its normal state, hopefully from whatever
418 . mess that any other DOS driver has put it in.
420 . Maybe I should reset more registers to defaults in here? SOFTRST should
424 . 1. send a SOFT RESET
425 . 2. wait for it to finish
426 . 3. enable autorelease mode
427 . 4. reset the memory management unit
428 . 5. clear all interrupts
431 static void smc_reset (void)
433 PRINTK2 ("%s: smc_reset\n", SMC_DEV_NAME);
435 /* This resets the registers mostly to defaults, but doesn't
436 affect EEPROM. That seems unnecessary */
438 SMC_outw (RCR_SOFTRST, RCR_REG);
440 /* Setup the Configuration Register */
441 /* This is necessary because the CONFIG_REG is not affected */
442 /* by a soft reset */
445 #if defined(CONFIG_SMC91111_EXT_PHY)
446 SMC_outw (CONFIG_DEFAULT | CONFIG_EXT_PHY, CONFIG_REG);
448 SMC_outw (CONFIG_DEFAULT, CONFIG_REG);
452 /* Release from possible power-down state */
453 /* Configuration register is not affected by Soft Reset */
454 SMC_outw (SMC_inw (CONFIG_REG) | CONFIG_EPH_POWER_EN, CONFIG_REG);
458 /* this should pause enough for the chip to be happy */
461 /* Disable transmit and receive functionality */
462 SMC_outw (RCR_CLEAR, RCR_REG);
463 SMC_outw (TCR_CLEAR, TCR_REG);
465 /* set the control register */
467 SMC_outw (CTL_DEFAULT, CTL_REG);
471 smc_wait_mmu_release_complete ();
472 SMC_outw (MC_RESET, MMU_CMD_REG);
473 while (SMC_inw (MMU_CMD_REG) & MC_BUSY)
474 udelay (1); /* Wait until not busy */
476 /* Note: It doesn't seem that waiting for the MMU busy is needed here,
477 but this is a place where future chipsets _COULD_ break. Be wary
478 of issuing another MMU command right after this */
480 /* Disable all interrupts */
481 SMC_outb (0, IM_REG);
485 . Function: smc_enable
486 . Purpose: let the chip talk to the outside work
488 . 1. Enable the transmitter
489 . 2. Enable the receiver
490 . 3. Enable interrupts
492 static void smc_enable()
494 PRINTK2("%s: smc_enable\n", SMC_DEV_NAME);
495 SMC_SELECT_BANK( 0 );
496 /* see the header file for options in TCR/RCR DEFAULT*/
497 SMC_outw( TCR_DEFAULT, TCR_REG );
498 SMC_outw( RCR_DEFAULT, RCR_REG );
501 /* smc_write_phy_register(PHY_CNTL_REG, 0x0000); */
505 . Function: smc_shutdown
506 . Purpose: closes down the SMC91xxx chip.
508 . 1. zero the interrupt mask
509 . 2. clear the enable receive flag
510 . 3. clear the enable xmit flags
513 . (1) maybe utilize power down mode.
514 . Why not yet? Because while the chip will go into power down mode,
515 . the manual says that it will wake up in response to any I/O requests
516 . in the register space. Empirical results do not show this working.
518 static void smc_shutdown()
520 PRINTK2(CARDNAME ": smc_shutdown\n");
522 /* no more interrupts for me */
523 SMC_SELECT_BANK( 2 );
524 SMC_outb( 0, IM_REG );
526 /* and tell the card to stay away from that nasty outside world */
527 SMC_SELECT_BANK( 0 );
528 SMC_outb( RCR_CLEAR, RCR_REG );
529 SMC_outb( TCR_CLEAR, TCR_REG );
534 . Function: smc_hardware_send_packet(struct net_device * )
536 . This sends the actual packet to the SMC9xxx chip.
539 . First, see if a saved_skb is available.
540 . ( this should NOT be called if there is no 'saved_skb'
541 . Now, find the packet number that the chip allocated
542 . Point the data pointers at it in memory
543 . Set the length word in the chip's memory
544 . Dump the packet to chip memory
545 . Check if a last byte is needed ( odd length packet )
546 . if so, set the control flag right
547 . Tell the card to send it
548 . Enable the transmit interrupt, so I know if it failed
549 . Free the kernel data if I actually sent it.
551 static int smc_send_packet (volatile void *packet, int packet_length)
554 unsigned long ioaddr;
564 /* save PTR and PNR registers before manipulation */
566 saved_pnr = SMC_inb( PN_REG );
567 saved_ptr = SMC_inw( PTR_REG );
569 PRINTK3 ("%s: smc_hardware_send_packet\n", SMC_DEV_NAME);
571 length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;
574 ** The MMU wants the number of pages to be the number of 256 bytes
575 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
577 ** The 91C111 ignores the size bits, but the code is left intact
578 ** for backwards and future compatibility.
580 ** Pkt size for allocating is data length +6 (for additional status
581 ** words, length and ctl!)
583 ** If odd size then last byte is included in this header.
585 numPages = ((length & 0xfffe) + 6);
586 numPages >>= 8; /* Divide by 256 */
589 printf ("%s: Far too big packet error. \n", SMC_DEV_NAME);
593 /* now, try to allocate the memory */
595 SMC_outw (MC_ALLOC | numPages, MMU_CMD_REG);
597 /* FIXME: the ALLOC_INT bit never gets set *
598 * so the following will always give a *
599 * memory allocation error. *
600 * same code works in armboot though *
606 time_out = MEMORY_WAIT_TIME;
608 status = SMC_inb (SMC91111_INT_REG);
609 if (status & IM_ALLOC_INT) {
610 /* acknowledge the interrupt */
611 SMC_outb (IM_ALLOC_INT, SMC91111_INT_REG);
614 } while (--time_out);
617 PRINTK2 ("%s: memory allocation, try %d failed ...\n",
619 if (try < SMC_ALLOC_MAX_TRY)
625 PRINTK2 ("%s: memory allocation, try %d succeeded ...\n",
628 /* I can send the packet now.. */
630 ioaddr = SMC_BASE_ADDRESS;
632 buf = (byte *) packet;
634 /* If I get here, I _know_ there is a packet slot waiting for me */
635 packet_no = SMC_inb (AR_REG);
636 if (packet_no & AR_FAILED) {
637 /* or isn't there? BAD CHIP! */
638 printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME);
642 /* we have a packet address, so tell the card to use it */
643 SMC_outb (packet_no, PN_REG);
645 /* do not write new ptr value if Write data fifo not empty */
646 while ( saved_ptr & PTR_NOTEMPTY )
647 printf ("Write data fifo not empty!\n");
649 /* point to the beginning of the packet */
650 SMC_outw (PTR_AUTOINC, PTR_REG);
652 PRINTK3 ("%s: Trying to xmit packet of length %x\n",
653 SMC_DEV_NAME, length);
656 printf ("Transmitting Packet\n");
657 print_packet (buf, length);
660 /* send the packet length ( +6 for status, length and ctl byte )
661 and the status word ( set to zeros ) */
663 SMC_outl ((length + 6) << 16, SMC91111_DATA_REG);
665 SMC_outw (0, SMC91111_DATA_REG);
666 /* send the packet length ( +6 for status words, length, and ctl */
667 SMC_outw ((length + 6), SMC91111_DATA_REG);
670 /* send the actual data
671 . I _think_ it's faster to send the longs first, and then
672 . mop up by sending the last word. It depends heavily
673 . on alignment, at least on the 486. Maybe it would be
674 . a good idea to check which is optimal? But that could take
675 . almost as much time as is saved?
678 SMC_outsl (SMC91111_DATA_REG, buf, length >> 2);
680 SMC_outw (*((word *) (buf + (length & 0xFFFFFFFC))),
683 SMC_outsw (SMC91111_DATA_REG, buf, (length) >> 1);
684 #endif /* USE_32_BIT */
686 /* Send the last byte, if there is one. */
687 if ((length & 1) == 0) {
688 SMC_outw (0, SMC91111_DATA_REG);
690 SMC_outw (buf[length - 1] | 0x2000, SMC91111_DATA_REG);
693 /* and let the chipset deal with it */
694 SMC_outw (MC_ENQUEUE, MMU_CMD_REG);
696 /* poll for TX INT */
697 /* if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) { */
698 /* poll for TX_EMPTY INT - autorelease enabled */
699 if (poll4int(IM_TX_EMPTY_INT, SMC_TX_TIMEOUT)) {
701 PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME);
704 /* no need to release, MMU does that now */
705 /* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
707 /* wait for MMU getting ready (low) */
708 while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
712 PRINTK2 ("MMU ready\n");
718 SMC_outb (IM_TX_EMPTY_INT, SMC91111_INT_REG);
719 /* SMC_outb (IM_TX_INT, SMC91111_INT_REG); */
720 PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME,
724 /* no need to release, MMU does that now */
725 /* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
727 /* wait for MMU getting ready (low) */
728 while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
732 PRINTK2 ("MMU ready\n");
737 /* restore previously saved registers */
738 SMC_outb( saved_pnr, PN_REG );
739 SMC_outw( saved_ptr, PTR_REG );
744 /*-------------------------------------------------------------------------
746 | smc_destructor( struct net_device * dev )
748 | dev, pointer to the device structure
753 ---------------------------------------------------------------------------
755 void smc_destructor()
757 PRINTK2(CARDNAME ": smc_destructor\n");
762 * Open and Initialize the board
764 * Set up everything, reset the card, etc ..
767 static int smc_open (bd_t * bd)
771 PRINTK2 ("%s: smc_open\n", SMC_DEV_NAME);
773 /* reset the hardware */
777 /* Configure the PHY */
778 #ifndef CONFIG_SMC91111_EXT_PHY
779 smc_phy_configure ();
782 /* conservative setting (10Mbps, HalfDuplex, no AutoNeg.) */
783 /* SMC_SELECT_BANK(0); */
784 /* SMC_outw(0, RPC_REG); */
787 err = smc_get_ethaddr (bd); /* set smc_mac_addr, and sync it with u-boot globals */
789 memset (bd->bi_enetaddr, 0, 6); /* hack to make error stick! upper code will abort if not set */
790 return (-1); /* upper code ignores this, but NOT bi_enetaddr */
793 for (i = 0; i < 6; i += 2) {
796 address = smc_mac_addr[i + 1] << 8;
797 address |= smc_mac_addr[i];
798 SMC_outw (address, ADDR0_REG + i);
801 for (i = 0; i < 6; i++)
802 SMC_outb (smc_mac_addr[i], ADDR0_REG + i);
808 /*-------------------------------------------------------------
810 . smc_rcv - receive a packet from the card
812 . There is ( at least ) a packet waiting to be read from
816 . o If an error, record it
817 . o otherwise, read in the packet
818 --------------------------------------------------------------
833 /* save PTR and PTR registers */
834 saved_pnr = SMC_inb( PN_REG );
835 saved_ptr = SMC_inw( PTR_REG );
837 packet_number = SMC_inw( RXFIFO_REG );
839 if ( packet_number & RXFIFO_REMPTY ) {
844 PRINTK3("%s: smc_rcv\n", SMC_DEV_NAME);
845 /* start reading from the start of the packet */
846 SMC_outw( PTR_READ | PTR_RCV | PTR_AUTOINC, PTR_REG );
848 /* First two words are status and packet_length */
850 stat_len = SMC_inl(SMC91111_DATA_REG);
851 status = stat_len & 0xffff;
852 packet_length = stat_len >> 16;
854 status = SMC_inw( SMC91111_DATA_REG );
855 packet_length = SMC_inw( SMC91111_DATA_REG );
858 packet_length &= 0x07ff; /* mask off top bits */
860 PRINTK2("RCV: STATUS %4x LENGTH %4x\n", status, packet_length );
862 if ( !(status & RS_ERRORS ) ){
863 /* Adjust for having already read the first two words */
864 packet_length -= 4; /*4; */
867 /* set odd length for bug in LAN91C111, */
868 /* which never sets RS_ODDFRAME */
873 PRINTK3(" Reading %d dwords (and %d bytes) \n",
874 packet_length >> 2, packet_length & 3 );
875 /* QUESTION: Like in the TX routine, do I want
876 to send the DWORDs or the bytes first, or some
877 mixture. A mixture might improve already slow PIO
879 SMC_insl( SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 2 );
880 /* read the left over bytes */
881 if (packet_length & 3) {
884 byte *tail = (byte *)(NetRxPackets[0] + (packet_length & ~3));
885 dword leftover = SMC_inl(SMC91111_DATA_REG);
886 for (i=0; i<(packet_length & 3); i++)
887 *tail++ = (byte) (leftover >> (8*i)) & 0xff;
890 PRINTK3(" Reading %d words and %d byte(s) \n",
891 (packet_length >> 1 ), packet_length & 1 );
892 SMC_insw(SMC91111_DATA_REG , NetRxPackets[0], packet_length >> 1);
894 #endif /* USE_32_BIT */
897 printf("Receiving Packet\n");
898 print_packet( NetRxPackets[0], packet_length );
906 while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
907 udelay(1); /* Wait until not busy */
909 /* error or good, tell the card to get rid of this packet */
910 SMC_outw( MC_RELEASE, MMU_CMD_REG );
912 while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
913 udelay(1); /* Wait until not busy */
915 /* restore saved registers */
916 SMC_outb( saved_pnr, PN_REG );
917 SMC_outw( saved_ptr, PTR_REG );
920 /* Pass the packet up to the protocol layers. */
921 NetReceive(NetRxPackets[0], packet_length);
922 return packet_length;
930 /*----------------------------------------------------
933 . this makes the board clean up everything that it can
934 . and not talk to the outside world. Caused by
935 . an 'ifconfig ethX down'
937 -----------------------------------------------------*/
938 static int smc_close()
940 PRINTK2("%s: smc_close\n", SMC_DEV_NAME);
942 /* clear everything */
950 /*------------------------------------------------------------
951 . Modify a bit in the LAN91C111 register set
952 .-------------------------------------------------------------*/
953 static word smc_modify_regbit(int bank, int ioaddr, int reg,
954 unsigned int bit, int val)
958 SMC_SELECT_BANK( bank );
960 regval = SMC_inw( reg );
966 SMC_outw( regval, 0 );
971 /*------------------------------------------------------------
972 . Retrieve a bit in the LAN91C111 register set
973 .-------------------------------------------------------------*/
974 static int smc_get_regbit(int bank, int ioaddr, int reg, unsigned int bit)
976 SMC_SELECT_BANK( bank );
977 if ( SMC_inw( reg ) & bit)
984 /*------------------------------------------------------------
985 . Modify a LAN91C111 register (word access only)
986 .-------------------------------------------------------------*/
987 static void smc_modify_reg(int bank, int ioaddr, int reg, word val)
989 SMC_SELECT_BANK( bank );
990 SMC_outw( val, reg );
994 /*------------------------------------------------------------
995 . Retrieve a LAN91C111 register (word access only)
996 .-------------------------------------------------------------*/
997 static int smc_get_reg(int bank, int ioaddr, int reg)
999 SMC_SELECT_BANK( bank );
1000 return(SMC_inw( reg ));
1005 /*---PHY CONTROL AND CONFIGURATION----------------------------------------- */
1007 #if (SMC_DEBUG > 2 )
1009 /*------------------------------------------------------------
1010 . Debugging function for viewing MII Management serial bitstream
1011 .-------------------------------------------------------------*/
1012 static void smc_dump_mii_stream (byte * bits, int size)
1017 for (i = 0; i < size; ++i) {
1018 printf ("%d", i % 10);
1022 for (i = 0; i < size; ++i) {
1023 if (bits[i] & MII_MDOE)
1030 for (i = 0; i < size; ++i) {
1031 if (bits[i] & MII_MDO)
1038 for (i = 0; i < size; ++i) {
1039 if (bits[i] & MII_MDI)
1049 /*------------------------------------------------------------
1050 . Reads a register from the MII Management serial interface
1051 .-------------------------------------------------------------*/
1052 #ifndef CONFIG_SMC91111_EXT_PHY
1053 static word smc_read_phy_register (byte phyreg)
1063 byte phyaddr = SMC_PHY_ADDR;
1065 /* 32 consecutive ones on MDO to establish sync */
1066 for (i = 0; i < 32; ++i)
1067 bits[clk_idx++] = MII_MDOE | MII_MDO;
1069 /* Start code <01> */
1070 bits[clk_idx++] = MII_MDOE;
1071 bits[clk_idx++] = MII_MDOE | MII_MDO;
1073 /* Read command <10> */
1074 bits[clk_idx++] = MII_MDOE | MII_MDO;
1075 bits[clk_idx++] = MII_MDOE;
1077 /* Output the PHY address, msb first */
1079 for (i = 0; i < 5; ++i) {
1081 bits[clk_idx++] = MII_MDOE | MII_MDO;
1083 bits[clk_idx++] = MII_MDOE;
1085 /* Shift to next lowest bit */
1089 /* Output the phy register number, msb first */
1091 for (i = 0; i < 5; ++i) {
1093 bits[clk_idx++] = MII_MDOE | MII_MDO;
1095 bits[clk_idx++] = MII_MDOE;
1097 /* Shift to next lowest bit */
1101 /* Tristate and turnaround (2 bit times) */
1102 bits[clk_idx++] = 0;
1103 /*bits[clk_idx++] = 0; */
1105 /* Input starts at this bit time */
1106 input_idx = clk_idx;
1108 /* Will input 16 bits */
1109 for (i = 0; i < 16; ++i)
1110 bits[clk_idx++] = 0;
1112 /* Final clock bit */
1113 bits[clk_idx++] = 0;
1115 /* Save the current bank */
1116 oldBank = SMC_inw (BANK_SELECT);
1119 SMC_SELECT_BANK (3);
1121 /* Get the current MII register value */
1122 mii_reg = SMC_inw (MII_REG);
1124 /* Turn off all MII Interface bits */
1125 mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);
1127 /* Clock all 64 cycles */
1128 for (i = 0; i < sizeof bits; ++i) {
1129 /* Clock Low - output data */
1130 SMC_outw (mii_reg | bits[i], MII_REG);
1131 udelay (SMC_PHY_CLOCK_DELAY);
1134 /* Clock Hi - input data */
1135 SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
1136 udelay (SMC_PHY_CLOCK_DELAY);
1137 bits[i] |= SMC_inw (MII_REG) & MII_MDI;
1140 /* Return to idle state */
1141 /* Set clock to low, data to low, and output tristated */
1142 SMC_outw (mii_reg, MII_REG);
1143 udelay (SMC_PHY_CLOCK_DELAY);
1145 /* Restore original bank select */
1146 SMC_SELECT_BANK (oldBank);
1148 /* Recover input data */
1150 for (i = 0; i < 16; ++i) {
1153 if (bits[input_idx++] & MII_MDI)
1157 #if (SMC_DEBUG > 2 )
1158 printf ("smc_read_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
1159 phyaddr, phyreg, phydata);
1160 smc_dump_mii_stream (bits, sizeof bits);
1167 /*------------------------------------------------------------
1168 . Writes a register to the MII Management serial interface
1169 .-------------------------------------------------------------*/
1170 static void smc_write_phy_register (byte phyreg, word phydata)
1178 byte phyaddr = SMC_PHY_ADDR;
1180 /* 32 consecutive ones on MDO to establish sync */
1181 for (i = 0; i < 32; ++i)
1182 bits[clk_idx++] = MII_MDOE | MII_MDO;
1184 /* Start code <01> */
1185 bits[clk_idx++] = MII_MDOE;
1186 bits[clk_idx++] = MII_MDOE | MII_MDO;
1188 /* Write command <01> */
1189 bits[clk_idx++] = MII_MDOE;
1190 bits[clk_idx++] = MII_MDOE | MII_MDO;
1192 /* Output the PHY address, msb first */
1194 for (i = 0; i < 5; ++i) {
1196 bits[clk_idx++] = MII_MDOE | MII_MDO;
1198 bits[clk_idx++] = MII_MDOE;
1200 /* Shift to next lowest bit */
1204 /* Output the phy register number, msb first */
1206 for (i = 0; i < 5; ++i) {
1208 bits[clk_idx++] = MII_MDOE | MII_MDO;
1210 bits[clk_idx++] = MII_MDOE;
1212 /* Shift to next lowest bit */
1216 /* Tristate and turnaround (2 bit times) */
1217 bits[clk_idx++] = 0;
1218 bits[clk_idx++] = 0;
1220 /* Write out 16 bits of data, msb first */
1222 for (i = 0; i < 16; ++i) {
1224 bits[clk_idx++] = MII_MDOE | MII_MDO;
1226 bits[clk_idx++] = MII_MDOE;
1228 /* Shift to next lowest bit */
1232 /* Final clock bit (tristate) */
1233 bits[clk_idx++] = 0;
1235 /* Save the current bank */
1236 oldBank = SMC_inw (BANK_SELECT);
1239 SMC_SELECT_BANK (3);
1241 /* Get the current MII register value */
1242 mii_reg = SMC_inw (MII_REG);
1244 /* Turn off all MII Interface bits */
1245 mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);
1247 /* Clock all cycles */
1248 for (i = 0; i < sizeof bits; ++i) {
1249 /* Clock Low - output data */
1250 SMC_outw (mii_reg | bits[i], MII_REG);
1251 udelay (SMC_PHY_CLOCK_DELAY);
1254 /* Clock Hi - input data */
1255 SMC_outw (mii_reg | bits[i] | MII_MCLK, MII_REG);
1256 udelay (SMC_PHY_CLOCK_DELAY);
1257 bits[i] |= SMC_inw (MII_REG) & MII_MDI;
1260 /* Return to idle state */
1261 /* Set clock to low, data to low, and output tristated */
1262 SMC_outw (mii_reg, MII_REG);
1263 udelay (SMC_PHY_CLOCK_DELAY);
1265 /* Restore original bank select */
1266 SMC_SELECT_BANK (oldBank);
1268 #if (SMC_DEBUG > 2 )
1269 printf ("smc_write_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
1270 phyaddr, phyreg, phydata);
1271 smc_dump_mii_stream (bits, sizeof bits);
1274 #endif /* !CONFIG_SMC91111_EXT_PHY */
1277 /*------------------------------------------------------------
1278 . Waits the specified number of milliseconds - kernel friendly
1279 .-------------------------------------------------------------*/
1280 #ifndef CONFIG_SMC91111_EXT_PHY
1281 static void smc_wait_ms(unsigned int ms)
1285 #endif /* !CONFIG_SMC91111_EXT_PHY */
1288 /*------------------------------------------------------------
1289 . Configures the specified PHY using Autonegotiation. Calls
1290 . smc_phy_fixed() if the user has requested a certain config.
1291 .-------------------------------------------------------------*/
1292 #ifndef CONFIG_SMC91111_EXT_PHY
1293 static void smc_phy_configure ()
1297 word my_phy_caps; /* My PHY capabilities */
1298 word my_ad_caps; /* My Advertised capabilities */
1299 word status = 0; /*;my status = 0 */
1302 PRINTK3 ("%s: smc_program_phy()\n", SMC_DEV_NAME);
1305 /* Get the detected phy address */
1306 phyaddr = SMC_PHY_ADDR;
1308 /* Reset the PHY, setting all other bits to zero */
1309 smc_write_phy_register (PHY_CNTL_REG, PHY_CNTL_RST);
1311 /* Wait for the reset to complete, or time out */
1312 timeout = 6; /* Wait up to 3 seconds */
1314 if (!(smc_read_phy_register (PHY_CNTL_REG)
1316 /* reset complete */
1320 smc_wait_ms (500); /* wait 500 millisecs */
1324 printf ("%s:PHY reset timed out\n", SMC_DEV_NAME);
1325 goto smc_phy_configure_exit;
1328 /* Read PHY Register 18, Status Output */
1329 /* lp->lastPhy18 = smc_read_phy_register(PHY_INT_REG); */
1331 /* Enable PHY Interrupts (for register 18) */
1332 /* Interrupts listed here are disabled */
1333 smc_write_phy_register (PHY_MASK_REG, 0xffff);
1335 /* Configure the Receive/Phy Control register */
1336 SMC_SELECT_BANK (0);
1337 SMC_outw (RPC_DEFAULT, RPC_REG);
1339 /* Copy our capabilities from PHY_STAT_REG to PHY_AD_REG */
1340 my_phy_caps = smc_read_phy_register (PHY_STAT_REG);
1341 my_ad_caps = PHY_AD_CSMA; /* I am CSMA capable */
1343 if (my_phy_caps & PHY_STAT_CAP_T4)
1344 my_ad_caps |= PHY_AD_T4;
1346 if (my_phy_caps & PHY_STAT_CAP_TXF)
1347 my_ad_caps |= PHY_AD_TX_FDX;
1349 if (my_phy_caps & PHY_STAT_CAP_TXH)
1350 my_ad_caps |= PHY_AD_TX_HDX;
1352 if (my_phy_caps & PHY_STAT_CAP_TF)
1353 my_ad_caps |= PHY_AD_10_FDX;
1355 if (my_phy_caps & PHY_STAT_CAP_TH)
1356 my_ad_caps |= PHY_AD_10_HDX;
1358 /* Update our Auto-Neg Advertisement Register */
1359 smc_write_phy_register (PHY_AD_REG, my_ad_caps);
1361 /* Read the register back. Without this, it appears that when */
1362 /* auto-negotiation is restarted, sometimes it isn't ready and */
1363 /* the link does not come up. */
1364 smc_read_phy_register(PHY_AD_REG);
1366 PRINTK2 ("%s: phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
1367 PRINTK2 ("%s: phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);
1369 /* Restart auto-negotiation process in order to advertise my caps */
1370 smc_write_phy_register (PHY_CNTL_REG,
1371 PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST);
1373 /* Wait for the auto-negotiation to complete. This may take from */
1374 /* 2 to 3 seconds. */
1375 /* Wait for the reset to complete, or time out */
1376 timeout = CONFIG_SMC_AUTONEG_TIMEOUT * 2;
1379 status = smc_read_phy_register (PHY_STAT_REG);
1380 if (status & PHY_STAT_ANEG_ACK) {
1381 /* auto-negotiate complete */
1385 smc_wait_ms (500); /* wait 500 millisecs */
1387 /* Restart auto-negotiation if remote fault */
1388 if (status & PHY_STAT_REM_FLT) {
1389 printf ("%s: PHY remote fault detected\n",
1392 /* Restart auto-negotiation */
1393 printf ("%s: PHY restarting auto-negotiation\n",
1395 smc_write_phy_register (PHY_CNTL_REG,
1404 printf ("%s: PHY auto-negotiate timed out\n", SMC_DEV_NAME);
1408 /* Fail if we detected an auto-negotiate remote fault */
1409 if (status & PHY_STAT_REM_FLT) {
1410 printf ("%s: PHY remote fault detected\n", SMC_DEV_NAME);
1414 /* Re-Configure the Receive/Phy Control register */
1415 SMC_outw (RPC_DEFAULT, RPC_REG);
1417 smc_phy_configure_exit:
1420 #endif /* !CONFIG_SMC91111_EXT_PHY */
1424 static void print_packet( byte * buf, int length )
1430 printf("Packet of length %d \n", length );
1433 lines = length / 16;
1434 remainder = length % 16;
1436 for ( i = 0; i < lines ; i ++ ) {
1439 for ( cur = 0; cur < 8; cur ++ ) {
1444 printf("%02x%02x ", a, b );
1448 for ( i = 0; i < remainder/2 ; i++ ) {
1453 printf("%02x%02x ", a, b );
1460 int eth_init(bd_t *bd) {
1461 return (smc_open(bd));
1472 int eth_send(volatile void *packet, int length) {
1473 return smc_send_packet(packet, length);
1476 int smc_get_ethaddr (bd_t * bd)
1478 int env_size, rom_valid, env_present = 0, reg;
1479 char *s = NULL, *e, *v_mac, es[] = "11:22:33:44:55:66";
1480 uchar s_env_mac[64], v_env_mac[6], v_rom_mac[6];
1482 env_size = getenv_r ("ethaddr", s_env_mac, sizeof (s_env_mac));
1483 if ((env_size > 0) && (env_size < sizeof (es))) { /* exit if env is bad */
1484 printf ("\n*** ERROR: ethaddr is not set properly!!\n");
1493 for (reg = 0; reg < 6; ++reg) { /* turn string into mac value */
1494 v_env_mac[reg] = s ? simple_strtoul (s, &e, 16) : 0;
1496 s = (*e) ? e + 1 : e;
1499 rom_valid = get_rom_mac (v_rom_mac); /* get ROM mac value if any */
1501 if (!env_present) { /* if NO env */
1502 if (rom_valid) { /* but ROM is valid */
1504 sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X",
1505 v_mac[0], v_mac[1], v_mac[2], v_mac[3],
1506 v_mac[4], v_mac[5]);
1507 setenv ("ethaddr", s_env_mac);
1508 } else { /* no env, bad ROM */
1509 printf ("\n*** ERROR: ethaddr is NOT set !!\n");
1512 } else { /* good env, don't care ROM */
1513 v_mac = v_env_mac; /* always use a good env over a ROM */
1516 if (env_present && rom_valid) { /* if both env and ROM are good */
1517 if (memcmp (v_env_mac, v_rom_mac, 6) != 0) {
1518 printf ("\nWarning: MAC addresses don't match:\n");
1519 printf ("\tHW MAC address: "
1520 "%02X:%02X:%02X:%02X:%02X:%02X\n",
1521 v_rom_mac[0], v_rom_mac[1],
1522 v_rom_mac[2], v_rom_mac[3],
1523 v_rom_mac[4], v_rom_mac[5] );
1524 printf ("\t\"ethaddr\" value: "
1525 "%02X:%02X:%02X:%02X:%02X:%02X\n",
1526 v_env_mac[0], v_env_mac[1],
1527 v_env_mac[2], v_env_mac[3],
1528 v_env_mac[4], v_env_mac[5]) ;
1529 debug ("### Set MAC addr from environment\n");
1532 memcpy (bd->bi_enetaddr, v_mac, 6); /* update global address to match env (allows env changing) */
1533 smc_set_mac_addr (v_mac); /* use old function to update smc default */
1534 PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1],
1535 v_mac[2], v_mac[3], v_mac[4], v_mac[5]);
1539 int get_rom_mac (char *v_rom_mac)
1541 #ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */
1542 char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 };
1544 memcpy (v_rom_mac, hw_mac_addr, 6);
1550 SMC_SELECT_BANK (1);
1553 v_rom_mac[i] = SMC_inb (ADDR0_REG + i);
1554 valid_mac |= v_rom_mac[i];
1557 return (valid_mac ? 1 : 0);
1560 #endif /* CONFIG_DRIVER_SMC91111 */