1 /*------------------------------------------------------------------------
3 . This is a driver for SMSC's 91C111 single-chip Ethernet device.
6 . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 . Rolf Offermanns <rof@sysgo.de>
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 * SPDX-License-Identifier: GPL-2.0+
15 . Information contained in this file was obtained from the LAN91C111
16 . manual from SMC. To get a copy, if you really want one, you can find
17 . information under www.smsc.com.
20 . "Features" of the SMC chip:
21 . Integrated PHY/MAC for 10/100BaseT Operation
22 . Supports internal and external MII
23 . Integrated 8K packet memory
24 . EEPROM interface for configuration
27 . io = for the base address
31 . Erik Stahlman ( erik@vt.edu )
32 . Daris A Nevil ( dnevil@snmc.com )
35 . Hardware multicast code from Peter Cammaert ( pc@denkart.be )
38 . o SMSC LAN91C111 databook (www.smsc.com)
39 . o smc9194.c by Erik Stahlman
40 . o skeleton.c by Donald Becker ( becker@cesdis.gsfc.nasa.gov )
43 . 06/19/03 Richard Woodruff Made u-boot environment aware and added mac addr checks.
44 . 10/17/01 Marco Hasewinkel Modify for DNP/1110
45 . 07/25/01 Woojung Huh Modify for ADS Bitsy
46 . 04/25/01 Daris A Nevil Initial public release through SMSC
47 . 03/16/01 Daris A Nevil Modified smc9194.c for use with LAN91C111
48 ----------------------------------------------------------------------------*/
57 /* Use power-down feature of the chip */
65 static const char version[] =
66 "smc91111.c:v1.0 04/25/01 by Daris A Nevil (dnevil@snmc.com)\n";
69 /* Autonegotiation timeout in seconds */
70 #ifndef CONFIG_SMC_AUTONEG_TIMEOUT
71 #define CONFIG_SMC_AUTONEG_TIMEOUT 10
74 /*------------------------------------------------------------------------
76 . Configuration options, for the experienced user to change.
78 -------------------------------------------------------------------------*/
81 . Wait time for memory to be free. This probably shouldn't be
82 . tuned that much, as waiting for this means nothing else happens
85 #define MEMORY_WAIT_TIME 16
89 #define PRINTK3(args...) printf(args)
91 #define PRINTK3(args...)
95 #define PRINTK2(args...) printf(args)
97 #define PRINTK2(args...)
101 #define PRINTK(args...) printf(args)
103 #define PRINTK(args...)
107 /*------------------------------------------------------------------------
109 . The internal workings of the driver. If you are changing anything
110 . here with the SMC stuff, you should have the datasheet and know
111 . what you are doing.
113 -------------------------------------------------------------------------*/
115 /* Memory sizing constant */
116 #define LAN91C111_MEMORY_MULTIPLIER (1024*2)
118 #ifndef CONFIG_SMC91111_BASE
119 #error "SMC91111 Base address must be passed to initialization funciton"
120 /* #define CONFIG_SMC91111_BASE 0x20000300 */
123 #define SMC_DEV_NAME "SMC91111"
124 #define SMC_PHY_ADDR 0x0000
125 #define SMC_ALLOC_MAX_TRY 5
126 #define SMC_TX_TIMEOUT 30
128 #define SMC_PHY_CLOCK_DELAY 1000
132 #ifdef CONFIG_SMC_USE_32_BIT
138 #ifdef SHARED_RESOURCES
139 extern void swap_to(int device_id);
144 #ifndef CONFIG_SMC91111_EXT_PHY
145 static void smc_phy_configure(struct eth_device *dev);
146 #endif /* !CONFIG_SMC91111_EXT_PHY */
149 ------------------------------------------------------------
153 ------------------------------------------------------------
156 #ifdef CONFIG_SMC_USE_IOFUNCS
158 * input and output functions
160 * Implemented due to inx,outx macros accessing the device improperly
161 * and putting the device into an unkown state.
163 * For instance, on Sharp LPD7A400 SDK, affects were chip memory
164 * could not be free'd (hence the alloc failures), duplicate packets,
165 * packets being corrupt (shifted) on the wire, etc. Switching to the
166 * inx,outx functions fixed this problem.
169 static inline word SMC_inw(struct eth_device *dev, dword offset)
172 v = *((volatile word*)(dev->iobase + offset));
173 barrier(); *(volatile u32*)(0xc0000000);
177 static inline void SMC_outw(struct eth_device *dev, word value, dword offset)
179 *((volatile word*)(dev->iobase + offset)) = value;
180 barrier(); *(volatile u32*)(0xc0000000);
183 static inline byte SMC_inb(struct eth_device *dev, dword offset)
187 _w = SMC_inw(dev, offset & ~((dword)1));
188 return (offset & 1) ? (byte)(_w >> 8) : (byte)(_w);
191 static inline void SMC_outb(struct eth_device *dev, byte value, dword offset)
195 _w = SMC_inw(dev, offset & ~((dword)1));
197 *((volatile word*)(dev->iobase + (offset & ~((dword)1)))) =
198 (value<<8) | (_w & 0x00ff);
200 *((volatile word*)(dev->iobase + offset)) =
201 value | (_w & 0xff00);
204 static inline void SMC_insw(struct eth_device *dev, dword offset,
205 volatile uchar* buf, dword len)
207 volatile word *p = (volatile word *)buf;
210 *p++ = SMC_inw(dev, offset);
212 *((volatile u32*)(0xc0000000));
216 static inline void SMC_outsw(struct eth_device *dev, dword offset,
217 uchar* buf, dword len)
219 volatile word *p = (volatile word *)buf;
222 SMC_outw(dev, *p++, offset);
224 *(volatile u32*)(0xc0000000);
227 #endif /* CONFIG_SMC_USE_IOFUNCS */
230 . A rather simple routine to print out a packet for debugging purposes.
233 static void print_packet( byte *, int );
236 #define tx_done(dev) 1
238 static int poll4int (struct eth_device *dev, byte mask, int timeout)
240 int tmo = get_timer (0) + timeout * CONFIG_SYS_HZ;
242 word old_bank = SMC_inw (dev, BSR_REG);
244 PRINTK2 ("Polling...\n");
245 SMC_SELECT_BANK (dev, 2);
246 while ((SMC_inw (dev, SMC91111_INT_REG) & mask) == 0) {
247 if (get_timer (0) >= tmo) {
253 /* restore old bank selection */
254 SMC_SELECT_BANK (dev, old_bank);
262 /* Only one release command at a time, please */
263 static inline void smc_wait_mmu_release_complete (struct eth_device *dev)
267 /* assume bank 2 selected */
268 while (SMC_inw (dev, MMU_CMD_REG) & MC_BUSY) {
269 udelay (1); /* Wait until not busy */
276 . Function: smc_reset( void )
278 . This sets the SMC91111 chip to its normal state, hopefully from whatever
279 . mess that any other DOS driver has put it in.
281 . Maybe I should reset more registers to defaults in here? SOFTRST should
285 . 1. send a SOFT RESET
286 . 2. wait for it to finish
287 . 3. enable autorelease mode
288 . 4. reset the memory management unit
289 . 5. clear all interrupts
292 static void smc_reset (struct eth_device *dev)
294 PRINTK2 ("%s: smc_reset\n", SMC_DEV_NAME);
296 /* This resets the registers mostly to defaults, but doesn't
297 affect EEPROM. That seems unnecessary */
298 SMC_SELECT_BANK (dev, 0);
299 SMC_outw (dev, RCR_SOFTRST, RCR_REG);
301 /* Setup the Configuration Register */
302 /* This is necessary because the CONFIG_REG is not affected */
303 /* by a soft reset */
305 SMC_SELECT_BANK (dev, 1);
306 #if defined(CONFIG_SMC91111_EXT_PHY)
307 SMC_outw (dev, CONFIG_DEFAULT | CONFIG_EXT_PHY, CONFIG_REG);
309 SMC_outw (dev, CONFIG_DEFAULT, CONFIG_REG);
313 /* Release from possible power-down state */
314 /* Configuration register is not affected by Soft Reset */
315 SMC_outw (dev, SMC_inw (dev, CONFIG_REG) | CONFIG_EPH_POWER_EN,
318 SMC_SELECT_BANK (dev, 0);
320 /* this should pause enough for the chip to be happy */
323 /* Disable transmit and receive functionality */
324 SMC_outw (dev, RCR_CLEAR, RCR_REG);
325 SMC_outw (dev, TCR_CLEAR, TCR_REG);
327 /* set the control register */
328 SMC_SELECT_BANK (dev, 1);
329 SMC_outw (dev, CTL_DEFAULT, CTL_REG);
332 SMC_SELECT_BANK (dev, 2);
333 smc_wait_mmu_release_complete (dev);
334 SMC_outw (dev, MC_RESET, MMU_CMD_REG);
335 while (SMC_inw (dev, MMU_CMD_REG) & MC_BUSY)
336 udelay (1); /* Wait until not busy */
338 /* Note: It doesn't seem that waiting for the MMU busy is needed here,
339 but this is a place where future chipsets _COULD_ break. Be wary
340 of issuing another MMU command right after this */
342 /* Disable all interrupts */
343 SMC_outb (dev, 0, IM_REG);
347 . Function: smc_enable
348 . Purpose: let the chip talk to the outside work
350 . 1. Enable the transmitter
351 . 2. Enable the receiver
352 . 3. Enable interrupts
354 static void smc_enable(struct eth_device *dev)
356 PRINTK2("%s: smc_enable\n", SMC_DEV_NAME);
357 SMC_SELECT_BANK( dev, 0 );
358 /* see the header file for options in TCR/RCR DEFAULT*/
359 SMC_outw( dev, TCR_DEFAULT, TCR_REG );
360 SMC_outw( dev, RCR_DEFAULT, RCR_REG );
363 /* smc_write_phy_register(PHY_CNTL_REG, 0x0000); */
368 . Purpose: closes down the SMC91xxx chip.
370 . 1. zero the interrupt mask
371 . 2. clear the enable receive flag
372 . 3. clear the enable xmit flags
375 . (1) maybe utilize power down mode.
376 . Why not yet? Because while the chip will go into power down mode,
377 . the manual says that it will wake up in response to any I/O requests
378 . in the register space. Empirical results do not show this working.
380 static void smc_halt(struct eth_device *dev)
382 PRINTK2("%s: smc_halt\n", SMC_DEV_NAME);
384 /* no more interrupts for me */
385 SMC_SELECT_BANK( dev, 2 );
386 SMC_outb( dev, 0, IM_REG );
388 /* and tell the card to stay away from that nasty outside world */
389 SMC_SELECT_BANK( dev, 0 );
390 SMC_outb( dev, RCR_CLEAR, RCR_REG );
391 SMC_outb( dev, TCR_CLEAR, TCR_REG );
398 . Function: smc_send(struct net_device * )
400 . This sends the actual packet to the SMC9xxx chip.
403 . First, see if a saved_skb is available.
404 . ( this should NOT be called if there is no 'saved_skb'
405 . Now, find the packet number that the chip allocated
406 . Point the data pointers at it in memory
407 . Set the length word in the chip's memory
408 . Dump the packet to chip memory
409 . Check if a last byte is needed ( odd length packet )
410 . if so, set the control flag right
411 . Tell the card to send it
412 . Enable the transmit interrupt, so I know if it failed
413 . Free the kernel data if I actually sent it.
415 static int smc_send(struct eth_device *dev, void *packet, int packet_length)
427 /* save PTR and PNR registers before manipulation */
428 SMC_SELECT_BANK (dev, 2);
429 saved_pnr = SMC_inb( dev, PN_REG );
430 saved_ptr = SMC_inw( dev, PTR_REG );
432 PRINTK3 ("%s: smc_hardware_send_packet\n", SMC_DEV_NAME);
434 length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN;
437 ** The MMU wants the number of pages to be the number of 256 bytes
438 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
440 ** The 91C111 ignores the size bits, but the code is left intact
441 ** for backwards and future compatibility.
443 ** Pkt size for allocating is data length +6 (for additional status
444 ** words, length and ctl!)
446 ** If odd size then last byte is included in this header.
448 numPages = ((length & 0xfffe) + 6);
449 numPages >>= 8; /* Divide by 256 */
452 printf ("%s: Far too big packet error. \n", SMC_DEV_NAME);
456 /* now, try to allocate the memory */
457 SMC_SELECT_BANK (dev, 2);
458 SMC_outw (dev, MC_ALLOC | numPages, MMU_CMD_REG);
460 /* FIXME: the ALLOC_INT bit never gets set *
461 * so the following will always give a *
462 * memory allocation error. *
463 * same code works in armboot though *
469 time_out = MEMORY_WAIT_TIME;
471 status = SMC_inb (dev, SMC91111_INT_REG);
472 if (status & IM_ALLOC_INT) {
473 /* acknowledge the interrupt */
474 SMC_outb (dev, IM_ALLOC_INT, SMC91111_INT_REG);
477 } while (--time_out);
480 PRINTK2 ("%s: memory allocation, try %d failed ...\n",
482 if (try < SMC_ALLOC_MAX_TRY)
488 PRINTK2 ("%s: memory allocation, try %d succeeded ...\n",
491 buf = (byte *) packet;
493 /* If I get here, I _know_ there is a packet slot waiting for me */
494 packet_no = SMC_inb (dev, AR_REG);
495 if (packet_no & AR_FAILED) {
496 /* or isn't there? BAD CHIP! */
497 printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME);
501 /* we have a packet address, so tell the card to use it */
502 SMC_outb (dev, packet_no, PN_REG);
504 /* do not write new ptr value if Write data fifo not empty */
505 while ( saved_ptr & PTR_NOTEMPTY )
506 printf ("Write data fifo not empty!\n");
508 /* point to the beginning of the packet */
509 SMC_outw (dev, PTR_AUTOINC, PTR_REG);
511 PRINTK3 ("%s: Trying to xmit packet of length %x\n",
512 SMC_DEV_NAME, length);
515 printf ("Transmitting Packet\n");
516 print_packet (buf, length);
519 /* send the packet length ( +6 for status, length and ctl byte )
520 and the status word ( set to zeros ) */
522 SMC_outl (dev, (length + 6) << 16, SMC91111_DATA_REG);
524 SMC_outw (dev, 0, SMC91111_DATA_REG);
525 /* send the packet length ( +6 for status words, length, and ctl */
526 SMC_outw (dev, (length + 6), SMC91111_DATA_REG);
529 /* send the actual data
530 . I _think_ it's faster to send the longs first, and then
531 . mop up by sending the last word. It depends heavily
532 . on alignment, at least on the 486. Maybe it would be
533 . a good idea to check which is optimal? But that could take
534 . almost as much time as is saved?
537 SMC_outsl (dev, SMC91111_DATA_REG, buf, length >> 2);
539 SMC_outw (dev, *((word *) (buf + (length & 0xFFFFFFFC))),
542 SMC_outsw (dev, SMC91111_DATA_REG, buf, (length) >> 1);
543 #endif /* USE_32_BIT */
545 /* Send the last byte, if there is one. */
546 if ((length & 1) == 0) {
547 SMC_outw (dev, 0, SMC91111_DATA_REG);
549 SMC_outw (dev, buf[length - 1] | 0x2000, SMC91111_DATA_REG);
552 /* and let the chipset deal with it */
553 SMC_outw (dev, MC_ENQUEUE, MMU_CMD_REG);
555 /* poll for TX INT */
556 /* if (poll4int (dev, IM_TX_INT, SMC_TX_TIMEOUT)) { */
557 /* poll for TX_EMPTY INT - autorelease enabled */
558 if (poll4int(dev, IM_TX_EMPTY_INT, SMC_TX_TIMEOUT)) {
560 PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME);
563 /* no need to release, MMU does that now */
565 /* wait for MMU getting ready (low) */
566 while (SMC_inw (dev, MMU_CMD_REG) & MC_BUSY) {
570 PRINTK2 ("MMU ready\n");
576 SMC_outb (dev, IM_TX_EMPTY_INT, SMC91111_INT_REG);
577 /* SMC_outb (IM_TX_INT, SMC91111_INT_REG); */
578 PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME,
582 /* no need to release, MMU does that now */
584 /* wait for MMU getting ready (low) */
585 while (SMC_inw (dev, MMU_CMD_REG) & MC_BUSY) {
589 PRINTK2 ("MMU ready\n");
594 /* restore previously saved registers */
595 SMC_outb( dev, saved_pnr, PN_REG );
596 SMC_outw( dev, saved_ptr, PTR_REG );
601 static int smc_write_hwaddr(struct eth_device *dev)
606 SMC_SELECT_BANK (dev, 1);
608 for (i = 0; i < 6; i += 2) {
611 address = dev->enetaddr[i + 1] << 8;
612 address |= dev->enetaddr[i];
613 SMC_outw(dev, address, (ADDR0_REG + i));
616 for (i = 0; i < 6; i++)
617 SMC_outb(dev, dev->enetaddr[i], (ADDR0_REG + i));
624 * Open and Initialize the board
626 * Set up everything, reset the card, etc ..
629 static int smc_init(struct eth_device *dev, bd_t *bd)
633 PRINTK2 ("%s: smc_init\n", SMC_DEV_NAME);
635 /* reset the hardware */
639 /* Configure the PHY */
640 #ifndef CONFIG_SMC91111_EXT_PHY
641 smc_phy_configure (dev);
644 /* conservative setting (10Mbps, HalfDuplex, no AutoNeg.) */
645 /* SMC_SELECT_BANK(dev, 0); */
646 /* SMC_outw(dev, 0, RPC_REG); */
648 printf(SMC_DEV_NAME ": MAC %pM\n", dev->enetaddr);
653 /*-------------------------------------------------------------
655 . smc_rcv - receive a packet from the card
657 . There is ( at least ) a packet waiting to be read from
661 . o If an error, record it
662 . o otherwise, read in the packet
663 --------------------------------------------------------------
665 static int smc_rcv(struct eth_device *dev)
677 SMC_SELECT_BANK(dev, 2);
678 /* save PTR and PTR registers */
679 saved_pnr = SMC_inb( dev, PN_REG );
680 saved_ptr = SMC_inw( dev, PTR_REG );
682 packet_number = SMC_inw( dev, RXFIFO_REG );
684 if ( packet_number & RXFIFO_REMPTY ) {
689 PRINTK3("%s: smc_rcv\n", SMC_DEV_NAME);
690 /* start reading from the start of the packet */
691 SMC_outw( dev, PTR_READ | PTR_RCV | PTR_AUTOINC, PTR_REG );
693 /* First two words are status and packet_length */
695 stat_len = SMC_inl(dev, SMC91111_DATA_REG);
696 status = stat_len & 0xffff;
697 packet_length = stat_len >> 16;
699 status = SMC_inw( dev, SMC91111_DATA_REG );
700 packet_length = SMC_inw( dev, SMC91111_DATA_REG );
703 packet_length &= 0x07ff; /* mask off top bits */
705 PRINTK2("RCV: STATUS %4x LENGTH %4x\n", status, packet_length );
707 if ( !(status & RS_ERRORS ) ){
708 /* Adjust for having already read the first two words */
709 packet_length -= 4; /*4; */
712 /* set odd length for bug in LAN91C111, */
713 /* which never sets RS_ODDFRAME */
718 PRINTK3(" Reading %d dwords (and %d bytes)\n",
719 packet_length >> 2, packet_length & 3 );
720 /* QUESTION: Like in the TX routine, do I want
721 to send the DWORDs or the bytes first, or some
722 mixture. A mixture might improve already slow PIO
724 SMC_insl(dev, SMC91111_DATA_REG, net_rx_packets[0],
726 /* read the left over bytes */
727 if (packet_length & 3) {
730 byte *tail = (byte *)(net_rx_packets[0] +
731 (packet_length & ~3));
732 dword leftover = SMC_inl(dev, SMC91111_DATA_REG);
733 for (i=0; i<(packet_length & 3); i++)
734 *tail++ = (byte) (leftover >> (8*i)) & 0xff;
737 PRINTK3(" Reading %d words and %d byte(s)\n",
738 (packet_length >> 1 ), packet_length & 1 );
739 SMC_insw(dev, SMC91111_DATA_REG , net_rx_packets[0],
742 #endif /* USE_32_BIT */
745 printf("Receiving Packet\n");
746 print_packet(net_rx_packets[0], packet_length);
754 while ( SMC_inw( dev, MMU_CMD_REG ) & MC_BUSY )
755 udelay(1); /* Wait until not busy */
757 /* error or good, tell the card to get rid of this packet */
758 SMC_outw( dev, MC_RELEASE, MMU_CMD_REG );
760 while ( SMC_inw( dev, MMU_CMD_REG ) & MC_BUSY )
761 udelay(1); /* Wait until not busy */
763 /* restore saved registers */
764 SMC_outb( dev, saved_pnr, PN_REG );
765 SMC_outw( dev, saved_ptr, PTR_REG );
768 /* Pass the packet up to the protocol layers. */
769 net_process_received_packet(net_rx_packets[0], packet_length);
770 return packet_length;
779 /*------------------------------------------------------------
780 . Modify a bit in the LAN91C111 register set
781 .-------------------------------------------------------------*/
782 static word smc_modify_regbit(struct eth_device *dev, int bank, int ioaddr, int reg,
783 unsigned int bit, int val)
787 SMC_SELECT_BANK( dev, bank );
789 regval = SMC_inw( dev, reg );
795 SMC_outw( dev, regval, 0 );
800 /*------------------------------------------------------------
801 . Retrieve a bit in the LAN91C111 register set
802 .-------------------------------------------------------------*/
803 static int smc_get_regbit(struct eth_device *dev, int bank, int ioaddr, int reg, unsigned int bit)
805 SMC_SELECT_BANK( dev, bank );
806 if ( SMC_inw( dev, reg ) & bit)
813 /*------------------------------------------------------------
814 . Modify a LAN91C111 register (word access only)
815 .-------------------------------------------------------------*/
816 static void smc_modify_reg(struct eth_device *dev, int bank, int ioaddr, int reg, word val)
818 SMC_SELECT_BANK( dev, bank );
819 SMC_outw( dev, val, reg );
823 /*------------------------------------------------------------
824 . Retrieve a LAN91C111 register (word access only)
825 .-------------------------------------------------------------*/
826 static int smc_get_reg(struct eth_device *dev, int bank, int ioaddr, int reg)
828 SMC_SELECT_BANK( dev, bank );
829 return(SMC_inw( dev, reg ));
834 /*---PHY CONTROL AND CONFIGURATION----------------------------------------- */
838 /*------------------------------------------------------------
839 . Debugging function for viewing MII Management serial bitstream
840 .-------------------------------------------------------------*/
841 static void smc_dump_mii_stream (byte * bits, int size)
846 for (i = 0; i < size; ++i) {
847 printf ("%d", i % 10);
851 for (i = 0; i < size; ++i) {
852 if (bits[i] & MII_MDOE)
859 for (i = 0; i < size; ++i) {
860 if (bits[i] & MII_MDO)
867 for (i = 0; i < size; ++i) {
868 if (bits[i] & MII_MDI)
878 /*------------------------------------------------------------
879 . Reads a register from the MII Management serial interface
880 .-------------------------------------------------------------*/
881 #ifndef CONFIG_SMC91111_EXT_PHY
882 static word smc_read_phy_register (struct eth_device *dev, byte phyreg)
892 byte phyaddr = SMC_PHY_ADDR;
894 /* 32 consecutive ones on MDO to establish sync */
895 for (i = 0; i < 32; ++i)
896 bits[clk_idx++] = MII_MDOE | MII_MDO;
898 /* Start code <01> */
899 bits[clk_idx++] = MII_MDOE;
900 bits[clk_idx++] = MII_MDOE | MII_MDO;
902 /* Read command <10> */
903 bits[clk_idx++] = MII_MDOE | MII_MDO;
904 bits[clk_idx++] = MII_MDOE;
906 /* Output the PHY address, msb first */
908 for (i = 0; i < 5; ++i) {
910 bits[clk_idx++] = MII_MDOE | MII_MDO;
912 bits[clk_idx++] = MII_MDOE;
914 /* Shift to next lowest bit */
918 /* Output the phy register number, msb first */
920 for (i = 0; i < 5; ++i) {
922 bits[clk_idx++] = MII_MDOE | MII_MDO;
924 bits[clk_idx++] = MII_MDOE;
926 /* Shift to next lowest bit */
930 /* Tristate and turnaround (2 bit times) */
932 /*bits[clk_idx++] = 0; */
934 /* Input starts at this bit time */
937 /* Will input 16 bits */
938 for (i = 0; i < 16; ++i)
941 /* Final clock bit */
944 /* Save the current bank */
945 oldBank = SMC_inw (dev, BANK_SELECT);
948 SMC_SELECT_BANK (dev, 3);
950 /* Get the current MII register value */
951 mii_reg = SMC_inw (dev, MII_REG);
953 /* Turn off all MII Interface bits */
954 mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);
956 /* Clock all 64 cycles */
957 for (i = 0; i < sizeof bits; ++i) {
958 /* Clock Low - output data */
959 SMC_outw (dev, mii_reg | bits[i], MII_REG);
960 udelay (SMC_PHY_CLOCK_DELAY);
963 /* Clock Hi - input data */
964 SMC_outw (dev, mii_reg | bits[i] | MII_MCLK, MII_REG);
965 udelay (SMC_PHY_CLOCK_DELAY);
966 bits[i] |= SMC_inw (dev, MII_REG) & MII_MDI;
969 /* Return to idle state */
970 /* Set clock to low, data to low, and output tristated */
971 SMC_outw (dev, mii_reg, MII_REG);
972 udelay (SMC_PHY_CLOCK_DELAY);
974 /* Restore original bank select */
975 SMC_SELECT_BANK (dev, oldBank);
977 /* Recover input data */
979 for (i = 0; i < 16; ++i) {
982 if (bits[input_idx++] & MII_MDI)
987 printf ("smc_read_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
988 phyaddr, phyreg, phydata);
989 smc_dump_mii_stream (bits, sizeof bits);
996 /*------------------------------------------------------------
997 . Writes a register to the MII Management serial interface
998 .-------------------------------------------------------------*/
999 static void smc_write_phy_register (struct eth_device *dev, byte phyreg,
1008 byte phyaddr = SMC_PHY_ADDR;
1010 /* 32 consecutive ones on MDO to establish sync */
1011 for (i = 0; i < 32; ++i)
1012 bits[clk_idx++] = MII_MDOE | MII_MDO;
1014 /* Start code <01> */
1015 bits[clk_idx++] = MII_MDOE;
1016 bits[clk_idx++] = MII_MDOE | MII_MDO;
1018 /* Write command <01> */
1019 bits[clk_idx++] = MII_MDOE;
1020 bits[clk_idx++] = MII_MDOE | MII_MDO;
1022 /* Output the PHY address, msb first */
1024 for (i = 0; i < 5; ++i) {
1026 bits[clk_idx++] = MII_MDOE | MII_MDO;
1028 bits[clk_idx++] = MII_MDOE;
1030 /* Shift to next lowest bit */
1034 /* Output the phy register number, msb first */
1036 for (i = 0; i < 5; ++i) {
1038 bits[clk_idx++] = MII_MDOE | MII_MDO;
1040 bits[clk_idx++] = MII_MDOE;
1042 /* Shift to next lowest bit */
1046 /* Tristate and turnaround (2 bit times) */
1047 bits[clk_idx++] = 0;
1048 bits[clk_idx++] = 0;
1050 /* Write out 16 bits of data, msb first */
1052 for (i = 0; i < 16; ++i) {
1054 bits[clk_idx++] = MII_MDOE | MII_MDO;
1056 bits[clk_idx++] = MII_MDOE;
1058 /* Shift to next lowest bit */
1062 /* Final clock bit (tristate) */
1063 bits[clk_idx++] = 0;
1065 /* Save the current bank */
1066 oldBank = SMC_inw (dev, BANK_SELECT);
1069 SMC_SELECT_BANK (dev, 3);
1071 /* Get the current MII register value */
1072 mii_reg = SMC_inw (dev, MII_REG);
1074 /* Turn off all MII Interface bits */
1075 mii_reg &= ~(MII_MDOE | MII_MCLK | MII_MDI | MII_MDO);
1077 /* Clock all cycles */
1078 for (i = 0; i < sizeof bits; ++i) {
1079 /* Clock Low - output data */
1080 SMC_outw (dev, mii_reg | bits[i], MII_REG);
1081 udelay (SMC_PHY_CLOCK_DELAY);
1084 /* Clock Hi - input data */
1085 SMC_outw (dev, mii_reg | bits[i] | MII_MCLK, MII_REG);
1086 udelay (SMC_PHY_CLOCK_DELAY);
1087 bits[i] |= SMC_inw (dev, MII_REG) & MII_MDI;
1090 /* Return to idle state */
1091 /* Set clock to low, data to low, and output tristated */
1092 SMC_outw (dev, mii_reg, MII_REG);
1093 udelay (SMC_PHY_CLOCK_DELAY);
1095 /* Restore original bank select */
1096 SMC_SELECT_BANK (dev, oldBank);
1098 #if (SMC_DEBUG > 2 )
1099 printf ("smc_write_phy_register(): phyaddr=%x,phyreg=%x,phydata=%x\n",
1100 phyaddr, phyreg, phydata);
1101 smc_dump_mii_stream (bits, sizeof bits);
1104 #endif /* !CONFIG_SMC91111_EXT_PHY */
1107 /*------------------------------------------------------------
1108 . Configures the specified PHY using Autonegotiation. Calls
1109 . smc_phy_fixed() if the user has requested a certain config.
1110 .-------------------------------------------------------------*/
1111 #ifndef CONFIG_SMC91111_EXT_PHY
1112 static void smc_phy_configure (struct eth_device *dev)
1115 word my_phy_caps; /* My PHY capabilities */
1116 word my_ad_caps; /* My Advertised capabilities */
1117 word status = 0; /*;my status = 0 */
1119 PRINTK3 ("%s: smc_program_phy()\n", SMC_DEV_NAME);
1121 /* Reset the PHY, setting all other bits to zero */
1122 smc_write_phy_register (dev, PHY_CNTL_REG, PHY_CNTL_RST);
1124 /* Wait for the reset to complete, or time out */
1125 timeout = 6; /* Wait up to 3 seconds */
1127 if (!(smc_read_phy_register (dev, PHY_CNTL_REG)
1129 /* reset complete */
1133 mdelay(500); /* wait 500 millisecs */
1137 printf ("%s:PHY reset timed out\n", SMC_DEV_NAME);
1138 goto smc_phy_configure_exit;
1141 /* Read PHY Register 18, Status Output */
1142 /* lp->lastPhy18 = smc_read_phy_register(PHY_INT_REG); */
1144 /* Enable PHY Interrupts (for register 18) */
1145 /* Interrupts listed here are disabled */
1146 smc_write_phy_register (dev, PHY_MASK_REG, 0xffff);
1148 /* Configure the Receive/Phy Control register */
1149 SMC_SELECT_BANK (dev, 0);
1150 SMC_outw (dev, RPC_DEFAULT, RPC_REG);
1152 /* Copy our capabilities from PHY_STAT_REG to PHY_AD_REG */
1153 my_phy_caps = smc_read_phy_register (dev, PHY_STAT_REG);
1154 my_ad_caps = PHY_AD_CSMA; /* I am CSMA capable */
1156 if (my_phy_caps & PHY_STAT_CAP_T4)
1157 my_ad_caps |= PHY_AD_T4;
1159 if (my_phy_caps & PHY_STAT_CAP_TXF)
1160 my_ad_caps |= PHY_AD_TX_FDX;
1162 if (my_phy_caps & PHY_STAT_CAP_TXH)
1163 my_ad_caps |= PHY_AD_TX_HDX;
1165 if (my_phy_caps & PHY_STAT_CAP_TF)
1166 my_ad_caps |= PHY_AD_10_FDX;
1168 if (my_phy_caps & PHY_STAT_CAP_TH)
1169 my_ad_caps |= PHY_AD_10_HDX;
1171 /* Update our Auto-Neg Advertisement Register */
1172 smc_write_phy_register (dev, PHY_AD_REG, my_ad_caps);
1174 /* Read the register back. Without this, it appears that when */
1175 /* auto-negotiation is restarted, sometimes it isn't ready and */
1176 /* the link does not come up. */
1177 smc_read_phy_register(dev, PHY_AD_REG);
1179 PRINTK2 ("%s: phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
1180 PRINTK2 ("%s: phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);
1182 /* Restart auto-negotiation process in order to advertise my caps */
1183 smc_write_phy_register (dev, PHY_CNTL_REG,
1184 PHY_CNTL_ANEG_EN | PHY_CNTL_ANEG_RST);
1186 /* Wait for the auto-negotiation to complete. This may take from */
1187 /* 2 to 3 seconds. */
1188 /* Wait for the reset to complete, or time out */
1189 timeout = CONFIG_SMC_AUTONEG_TIMEOUT * 2;
1192 status = smc_read_phy_register (dev, PHY_STAT_REG);
1193 if (status & PHY_STAT_ANEG_ACK) {
1194 /* auto-negotiate complete */
1198 mdelay(500); /* wait 500 millisecs */
1200 /* Restart auto-negotiation if remote fault */
1201 if (status & PHY_STAT_REM_FLT) {
1202 printf ("%s: PHY remote fault detected\n",
1205 /* Restart auto-negotiation */
1206 printf ("%s: PHY restarting auto-negotiation\n",
1208 smc_write_phy_register (dev, PHY_CNTL_REG,
1217 printf ("%s: PHY auto-negotiate timed out\n", SMC_DEV_NAME);
1220 /* Fail if we detected an auto-negotiate remote fault */
1221 if (status & PHY_STAT_REM_FLT) {
1222 printf ("%s: PHY remote fault detected\n", SMC_DEV_NAME);
1225 /* Re-Configure the Receive/Phy Control register */
1226 SMC_outw (dev, RPC_DEFAULT, RPC_REG);
1228 smc_phy_configure_exit: ;
1231 #endif /* !CONFIG_SMC91111_EXT_PHY */
1235 static void print_packet( byte * buf, int length )
1241 printf("Packet of length %d \n", length );
1244 lines = length / 16;
1245 remainder = length % 16;
1247 for ( i = 0; i < lines ; i ++ ) {
1250 for ( cur = 0; cur < 8; cur ++ ) {
1255 printf("%02x%02x ", a, b );
1259 for ( i = 0; i < remainder/2 ; i++ ) {
1264 printf("%02x%02x ", a, b );
1271 int smc91111_initialize(u8 dev_num, int base_addr)
1273 struct smc91111_priv *priv;
1274 struct eth_device *dev;
1277 priv = malloc(sizeof(*priv));
1280 dev = malloc(sizeof(*dev));
1286 memset(dev, 0, sizeof(*dev));
1287 priv->dev_num = dev_num;
1289 dev->iobase = base_addr;
1292 SMC_SELECT_BANK(dev, 1);
1293 for (i = 0; i < 6; ++i)
1294 dev->enetaddr[i] = SMC_inb(dev, (ADDR0_REG + i));
1297 dev->init = smc_init;
1298 dev->halt = smc_halt;
1299 dev->send = smc_send;
1300 dev->recv = smc_rcv;
1301 dev->write_hwaddr = smc_write_hwaddr;
1302 sprintf(dev->name, "%s-%hu", SMC_DEV_NAME, dev_num);