1 /*------------------------------------------------------------------------
3 . This is a driver for 3Com's 3C589 (Etherlink III) PCMCIA Ethernet device.
6 . Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 . Rolf Offermanns <rof@sysgo.de>
9 . This program is free software; you can redistribute it and/or modify
10 . it under the terms of the GNU General Public License as published by
11 . the Free Software Foundation; either version 2 of the License, or
12 . (at your option) any later version.
14 . This program is distributed in the hope that it will be useful,
15 . but WITHOUT ANY WARRANTY; without even the implied warranty of
16 . MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 . GNU General Public License for more details.
19 . You should have received a copy of the GNU General Public License
20 . along with this program; if not, write to the Free Software
21 . Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 ----------------------------------------------------------------------------*/
32 /* Use power-down feature of the chip */
37 static const char version[] =
43 typedef unsigned char byte;
44 typedef unsigned short word;
45 typedef unsigned long int dword;
46 /*------------------------------------------------------------------------
48 . Configuration options, for the experienced user to change.
50 -------------------------------------------------------------------------*/
53 . Wait time for memory to be free. This probably shouldn't be
54 . tuned that much, as waiting for this means nothing else happens
57 #define MEMORY_WAIT_TIME 16
61 #define PRINTK3(args...) printf(args)
63 #define PRINTK3(args...)
67 #define PRINTK2(args...) printf(args)
69 #define PRINTK2(args...)
73 #define PRINTK(args...) printf(args)
75 #define PRINTK(args...)
78 #define outb(args...) mmio_outb(args)
79 #define mmio_outb(value, addr) (*((volatile byte *)(addr)) = value)
81 #define inb(args...) mmio_inb(args)
82 #define mmio_inb(addr) (*((volatile byte *)(addr)))
84 #define outw(args...) mmio_outw(args)
85 #define mmio_outw(value, addr) (*((volatile word *)(addr)) = value)
87 #define inw(args...) mmio_inw(args)
88 #define mmio_inw(addr) (*((volatile word *)(addr)))
90 #define outsw(args...) mmio_outsw(args)
91 #define mmio_outsw(r,b,l) ({ int __i; \
94 for (__i = 0; __i < l; __i++) { \
95 mmio_outw( *(__b2 + __i), r); \
99 #define insw(args...) mmio_insw(args)
100 #define mmio_insw(r,b,l) ({ int __i ; \
103 for (__i = 0; __i < l; __i++) { \
104 *(__b2 + __i) = mmio_inw(r); \
109 /*------------------------------------------------------------------------
111 . The internal workings of the driver. If you are changing anything
112 . here with the 3Com stuff, you should have the datasheet and know
113 . what you are doing.
115 -------------------------------------------------------------------------*/
116 #define EL_BASE_ADDR 0x20000000
119 /* Offsets from base I/O address. */
120 #define EL3_DATA 0x00
121 #define EL3_TIMER 0x0a
123 #define EL3_STATUS 0x0e
125 #define EEPROM_READ 0x0080
127 #define EL3WINDOW(win_num) mmio_outw(SelectWindow + (win_num), EL_BASE_ADDR + EL3_CMD)
129 /* The top five bits written to EL3_CMD are a command, the lower
130 11 bits are the parameter, if applicable. */
132 TotalReset = 0<<11, SelectWindow = 1<<11, StartCoax = 2<<11,
133 RxDisable = 3<<11, RxEnable = 4<<11, RxReset = 5<<11, RxDiscard = 8<<11,
134 TxEnable = 9<<11, TxDisable = 10<<11, TxReset = 11<<11,
135 FakeIntr = 12<<11, AckIntr = 13<<11, SetIntrEnb = 14<<11,
136 SetStatusEnb = 15<<11, SetRxFilter = 16<<11, SetRxThreshold = 17<<11,
137 SetTxThreshold = 18<<11, SetTxStart = 19<<11, StatsEnable = 21<<11,
138 StatsDisable = 22<<11, StopCoax = 23<<11,
142 IntLatch = 0x0001, AdapterFailure = 0x0002, TxComplete = 0x0004,
143 TxAvailable = 0x0008, RxComplete = 0x0010, RxEarly = 0x0020,
144 IntReq = 0x0040, StatsFull = 0x0080, CmdBusy = 0x1000
147 /* The SetRxFilter command accepts the following classes: */
149 RxStation = 1, RxMulticast = 2, RxBroadcast = 4, RxProm = 8
152 /* Register window 1 offsets, the window used in normal operation. */
155 #define RX_STATUS 0x08
156 #define TX_STATUS 0x0B
157 #define TX_FREE 0x0C /* Remaining free bytes in Tx buffer. */
161 Read a word from the EEPROM using the regular EEPROM access register.
162 Assume that we are in register window zero.
164 static word read_eeprom(dword ioaddr, int index)
167 outw(EEPROM_READ + index, ioaddr + 0xa);
168 /* Reading the eeprom takes 162 us */
169 for (i = 1620; i >= 0; i--)
170 if ((inw(ioaddr + 10) & EEPROM_BUSY) == 0)
172 return inw(ioaddr + 0xc);
175 static void el_get_mac_addr( unsigned char *mac_addr )
183 unsigned char old_window = inw( EL_BASE_ADDR + EL3_STATUS ) >> 13;
186 for (i = 0; i < 3; i++)
188 wrd.w = read_eeprom(EL_BASE_ADDR, 0xa+i);
190 mac_addr[2*i] = wrd.b[0];
191 mac_addr[2*i+1] = wrd.b[1];
193 mac_addr[2*i] = wrd.b[1];
194 mac_addr[2*i+1] = wrd.b[0];
197 GO_WINDOW(old_window);
203 static void print_packet( byte * buf, int length )
209 PRINTK2("Packet of length %d \n", length );
212 remainder = length % 16;
214 for ( i = 0; i < lines ; i ++ ) {
217 for ( cur = 0; cur < 8; cur ++ ) {
222 PRINTK2("%02x%02x ", a, b );
226 for ( i = 0; i < remainder/2 ; i++ ) {
231 PRINTK2("%02x%02x ", a, b );
235 #endif /* EL_DEBUG > 1 */
238 /**************************************************************************
239 ETH_RESET - Reset adapter
240 ***************************************************************************/
241 static void el_reset(bd_t *bd)
243 /***********************************************************
245 *************************************************************/
247 * - adjust timing for 3c589
248 * - enable io for PCMCIA */
249 outw(0x0004, 0xa0000018);
251 outw(0x0041, 0x28010000);
254 /* issue global reset */
255 outw(GLOBAL_RESET, BASE + VX_COMMAND);
257 /* must wait for at least 1ms */
265 if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
266 el_get_mac_addr(mac_addr);
267 eth_setenv_enetaddr("ethaddr", mac_addr);
273 printf("3C589 MAC Addr.: ");
274 for (i = 0; i < 6; i++)
276 printf("%02x", mac_addr[i]);
277 outb(mac_addr[i], BASE + VX_W2_ADDR_0 + i);
284 outw(SET_RX_FILTER | FIL_INDIVIDUAL | FIL_BRDCST, BASE + VX_COMMAND);
288 /* set irq mask and read_zero */
289 outw(SET_RD_0_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
290 S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
293 outw(SET_INTR_MASK | S_CARD_FAILURE | S_RX_COMPLETE |
294 S_TX_COMPLETE | S_TX_AVAIL, BASE + VX_COMMAND);
297 /* enable TP Linkbeat */
301 outw( ENABLE_UTP, BASE + VX_W4_MEDIA_TYPE);
306 * Attempt to get rid of any stray interrupts that occured during
307 * configuration. On the i386 this isn't possible because one may
308 * already be queued. However, a single stray interrupt is
312 outw(ACK_INTR | 0xff, BASE + VX_COMMAND);
315 /* enable TX and RX */
316 outw( RX_ENABLE, BASE + VX_COMMAND );
319 outw( TX_ENABLE, BASE + VX_COMMAND );
323 /* print the diag. regs. */
324 PRINTK2("Diag. Regs\n");
325 PRINTK2("--> MEDIA_TYPE: %04x\n", inw(BASE + VX_W4_MEDIA_TYPE));
326 PRINTK2("--> NET_DIAG: %04x\n", inw(BASE + VX_W4_NET_DIAG));
327 PRINTK2("--> FIFO_DIAG: %04x\n", inw(BASE + VX_W4_FIFO_DIAG));
328 PRINTK2("--> CTRLR_STATUS: %04x\n", inw(BASE + VX_W4_CTRLR_STATUS));
331 /* enter working mode */
335 /* wait for another 1ms */
340 /*-----------------------------------------------------------------
342 . The driver can be entered at any of the following entry points.
344 .------------------------------------------------------------------ */
346 extern int eth_init(bd_t *bd);
347 extern void eth_halt(void);
348 extern int eth_rx(void);
349 extern int eth_send(volatile void *packet, int length);
353 ------------------------------------------------------------
357 ------------------------------------------------------------
360 int eth_init(bd_t *bd)
373 /**************************************************************************
374 ETH_POLL - Wait for a frame
375 ***************************************************************************/
379 word status, rx_status, packet_size;
383 status = inw( BASE + VX_STATUS );
385 if ( (status & S_RX_COMPLETE) == 0 ) return 0; /* nothing to do */
387 /* Packet waiting -> check RX_STATUS */
388 rx_status = inw( BASE + VX_W1_RX_STATUS );
390 if ( rx_status & ERR_RX )
392 /* error in packet -> discard */
393 PRINTK("[ERROR] Invalid packet -> discarding\n");
394 PRINTK("-- error code 0x%02x\n", rx_status & ERR_MASK);
395 PRINTK("-- rx bytes 0x%04d\n", rx_status & ((1<<11) - 1));
396 PRINTK("[ERROR] Invalid packet -> discarding\n");
397 outw( RX_DISCARD_TOP_PACK, BASE + VX_COMMAND );
401 /* correct pack. waiting in fifo */
402 packet_size = rx_status & RX_BYTES_MASK;
404 PRINTK("Correct packet waiting in fifo, size: %d\n", packet_size);
407 volatile word *packet_start = (word *)(BASE + VX_W1_RX_PIO_RD_1);
408 word *RcvBuffer = (word *)(NetRxPackets[0]);
411 for (wcount = 0; wcount < (packet_size >> 1); wcount++)
413 *RcvBuffer++ = *(packet_start);
416 /* handle odd packets */
417 if ( packet_size & 1 )
419 *RcvBuffer++ = *(packet_start);
423 /* fifo should now be empty (besides the padding bytes) */
424 if ( ((*((word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK) > 3 )
426 PRINTK("[ERROR] Fifo not empty after packet read (remaining pkts: %d)\n",
427 (((*(word *)(BASE + VX_W1_RX_STATUS))) & RX_BYTES_MASK));
431 *((word *)(BASE + VX_COMMAND)) = RX_DISCARD_TOP_PACK;
433 /* Pass Packets to upper Layer */
434 NetReceive(NetRxPackets[0], packet_size);
439 /**************************************************************************
440 ETH_TRANSMIT - Transmit a frame
441 ***************************************************************************/
442 static char padmap[] = {
446 int eth_send(volatile void *packet, int length) {
449 volatile word *buf = (word *)packet;
453 pad = padmap[length & 3];
455 PRINTK("eth_send(), length: %d\n", length);
456 /* drop acknowledgements */
457 while(( status=inb(EL_BASE_ADDR + VX_W1_TX_STATUS) )& TXS_COMPLETE ) {
458 if(status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) {
459 outw(TX_RESET, EL_BASE_ADDR + VX_COMMAND);
460 outw(TX_ENABLE, EL_BASE_ADDR + VX_COMMAND);
461 PRINTK("Bad status, resetting and reenabling transmitter\n");
464 outb(0x0, EL_BASE_ADDR + VX_W1_TX_STATUS);
468 while (inw(EL_BASE_ADDR + VX_W1_FREE_TX) < length + pad + 4) {
469 /* no room in FIFO */
472 PRINTK("No room in FIFO, waiting...\n");
478 PRINTK(" ---> FIFO ready\n");
481 outw(length, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
483 /* Second dword meaningless */
484 outw(0x0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
487 print_packet((byte *)buf, length);
492 unsigned int i, totw;
494 totw = ((length + 1) >> 1);
495 PRINTK("Buffer: (totw = %d)\n", totw);
496 for (i = 0; i < totw; i++) {
497 outw( *(buf+i), EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
501 { /* pad to double word length */
502 outw( 0, EL_BASE_ADDR + VX_W1_TX_PIO_WR_1);
508 /* wait for Tx complete */
509 PRINTK("Waiting for Tx to complete...\n");
510 while(((status = inw(EL_BASE_ADDR + VX_STATUS)) & S_COMMAND_IN_PROGRESS) != 0)
514 PRINTK(" ---> Tx completed, status = 0x%04x\n", status);