2 dm9000.c: Version 1.2 12/15/2003
4 A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
5 Copyright (C) 1997 Sten Wang
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License
9 as published by the Free Software Foundation; either version 2
10 of the License, or (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
19 V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
20 06/22/2001 Support DM9801 progrmming
21 E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
22 E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
23 R17 = (R17 & 0xfff0) | NF + 3
24 E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
25 R17 = (R17 & 0xfff0) | NF
27 v1.00 modify by simon 2001.9.5
28 change for kernel 2.4.x
30 v1.1 11/09/2001 fix force mode bug
32 v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
34 Added tx/rx 32 bit mode.
35 Cleaned up for kernel merge.
37 --------------------------------------
39 12/15/2003 Initial port to u-boot by Sascha Hauer <saschahauer@web.de>
41 TODO: Homerun NIC and longrun NIC are not functional, only internal at the
50 #ifdef CONFIG_DRIVER_DM9000
54 /* Board/System/Debug information/definition ---------------- */
56 #define DM9801_NOISE_FLOOR 0x08
57 #define DM9802_NOISE_FLOOR 0x05
59 /* #define CONFIG_DM9000_DEBUG */
61 #ifdef CONFIG_DM9000_DEBUG
62 #define DM9000_DBG(fmt,args...) printf(fmt ,##args)
64 #define DM9000_DBG(fmt,args...)
66 enum DM9000_PHY_mode { DM9000_10MHD = 0, DM9000_100MHD =
67 1, DM9000_10MFD = 4, DM9000_100MFD = 5, DM9000_AUTO =
68 8, DM9000_1M_HPNA = 0x10
70 enum DM9000_NIC_TYPE { FASTETHER_NIC = 0, HOMERUN_NIC = 1, LONGRUN_NIC = 2
73 /* Structure/enum declaration ------------------------------- */
74 typedef struct board_info {
75 u32 runt_length_counter; /* counter: RX length < 64byte */
76 u32 long_length_counter; /* counter: RX length > 1514byte */
77 u32 reset_counter; /* counter: RESET */
78 u32 reset_tx_timeout; /* RESET caused by TX Timeout */
79 u32 reset_rx_status; /* RESET caused by RX Statsus wrong */
84 u8 device_wait_reset; /* device state */
85 u8 nic_type; /* NIC type */
86 unsigned char srom[128];
88 board_info_t dmfe_info;
90 /* For module input parameter */
91 static int media_mode = DM9000_AUTO;
94 /* function declaration ------------------------------------- */
95 int eth_init(bd_t * bd);
96 int eth_send(volatile void *, int);
99 static int dm9000_probe(void);
100 static u16 phy_read(int);
101 static void phy_write(int, u16);
102 u16 read_srom_word(int);
103 static u8 DM9000_ior(int);
104 static void DM9000_iow(int reg, u8 value);
106 /* DM9000 network board routine ---------------------------- */
108 #define DM9000_outb(d,r) ( *(volatile u8 *)r = d )
109 #define DM9000_outw(d,r) ( *(volatile u16 *)r = d )
110 #define DM9000_outl(d,r) ( *(volatile u32 *)r = d )
111 #define DM9000_inb(r) (*(volatile u8 *)r)
112 #define DM9000_inw(r) (*(volatile u16 *)r)
113 #define DM9000_inl(r) (*(volatile u32 *)r)
115 #ifdef CONFIG_DM9000_DEBUG
120 DM9000_DBG("NCR (0x00): %02x\n", DM9000_ior(0));
121 DM9000_DBG("NSR (0x01): %02x\n", DM9000_ior(1));
122 DM9000_DBG("TCR (0x02): %02x\n", DM9000_ior(2));
123 DM9000_DBG("TSRI (0x03): %02x\n", DM9000_ior(3));
124 DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));
125 DM9000_DBG("RCR (0x05): %02x\n", DM9000_ior(5));
126 DM9000_DBG("RSR (0x06): %02x\n", DM9000_ior(6));
127 DM9000_DBG("ISR (0xFE): %02x\n", DM9000_ior(ISR));
133 Search DM9000 board, allocate space and register it
139 id_val = DM9000_ior(DM9000_VIDL);
140 id_val |= DM9000_ior(DM9000_VIDH) << 8;
141 id_val |= DM9000_ior(DM9000_PIDL) << 16;
142 id_val |= DM9000_ior(DM9000_PIDH) << 24;
143 if (id_val == DM9000_ID) {
144 printf("dm9000 i/o: 0x%x, id: 0x%x \n", CONFIG_DM9000_BASE,
148 printf("dm9000 not found at 0x%08x id: 0x%08x\n",
149 CONFIG_DM9000_BASE, id_val);
154 /* Set PHY operationg mode
159 u16 phy_reg4 = 0x01e1, phy_reg0 = 0x1000;
160 if (!(media_mode & DM9000_AUTO)) {
161 switch (media_mode) {
179 phy_write(4, phy_reg4); /* Set PHY media mode */
180 phy_write(0, phy_reg0); /* Tmp */
182 DM9000_iow(DM9000_GPCR, 0x01); /* Let GPIO0 output */
183 DM9000_iow(DM9000_GPR, 0x00); /* Enable PHY */
190 program_dm9801(u16 HPNA_rev)
192 __u16 reg16, reg17, reg24, reg25;
194 nfloor = DM9801_NOISE_FLOOR;
195 reg16 = phy_read(16);
196 reg17 = phy_read(17);
197 reg24 = phy_read(24);
198 reg25 = phy_read(25);
200 case 0xb900: /* DM9801 E3 */
202 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xf000;
204 case 0xb901: /* DM9801 E4 */
205 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xc200;
206 reg17 = (reg17 & 0xfff0) + nfloor + 3;
208 case 0xb902: /* DM9801 E5 */
209 case 0xb903: /* DM9801 E6 */
212 reg25 = ((reg24 + nfloor - 3) & 0x00ff) | 0xc200;
213 reg17 = (reg17 & 0xfff0) + nfloor;
215 phy_write(16, reg16);
216 phy_write(17, reg17);
217 phy_write(25, reg25);
228 nfloor = DM9802_NOISE_FLOOR;
229 reg25 = phy_read(25);
230 reg25 = (reg25 & 0xff00) + nfloor;
231 phy_write(25, reg25);
239 struct board_info *db = &dmfe_info; /* Point a board information structure */
241 DM9000_iow(DM9000_NCR, NCR_EXT_PHY);
242 phy_reg3 = phy_read(3);
243 switch (phy_reg3 & 0xfff0) {
245 if (phy_read(31) == 0x4404) {
246 db->nic_type = HOMERUN_NIC;
247 program_dm9801(phy_reg3);
248 DM9000_DBG("found homerun NIC\n");
250 db->nic_type = LONGRUN_NIC;
251 DM9000_DBG("found longrun NIC\n");
256 db->nic_type = FASTETHER_NIC;
259 DM9000_iow(DM9000_NCR, 0);
262 /* General Purpose dm9000 reset routine */
266 DM9000_DBG("resetting\n");
267 DM9000_iow(DM9000_NCR, NCR_RST);
268 udelay(1000); /* delay 1ms */
271 /* Initilize dm9000 board
277 DM9000_DBG("eth_init()\n");
283 /* NIC Type: FASTETHER, HOMERUN, LONGRUN */
286 /* GPIO0 on pre-activate PHY */
287 DM9000_iow(DM9000_GPR, 0x00); /*REG_1F bit0 activate phyxcer */
292 /* Program operating register */
293 DM9000_iow(DM9000_NCR, 0x0); /* only intern phy supported by now */
294 DM9000_iow(DM9000_TCR, 0); /* TX Polling clear */
295 DM9000_iow(DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
296 DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8)); /* Flow Control : High/Low Water */
297 DM9000_iow(DM9000_FCR, 0x0); /* SH FIXME: This looks strange! Flow Control */
298 DM9000_iow(DM9000_SMCR, 0); /* Special Mode */
299 DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END); /* clear TX status */
300 DM9000_iow(DM9000_ISR, 0x0f); /* Clear interrupt status */
302 /* Set Node address */
303 for (i = 0; i < 6; i++)
304 ((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i);
306 if (is_zero_ether_addr(bd->bi_enetaddr) ||
307 is_multicast_ether_addr(bd->bi_enetaddr)) {
308 /* try reading from environment */
311 s = getenv ("ethaddr");
312 for (i = 0; i < 6; ++i) {
313 bd->bi_enetaddr[i] = s ?
314 simple_strtoul (s, &e, 16) : 0;
316 s = (*e) ? e + 1 : e;
320 printf("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", bd->bi_enetaddr[0],
321 bd->bi_enetaddr[1], bd->bi_enetaddr[2], bd->bi_enetaddr[3],
322 bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
323 for (i = 0, oft = 0x10; i < 6; i++, oft++)
324 DM9000_iow(oft, bd->bi_enetaddr[i]);
325 for (i = 0, oft = 0x16; i < 8; i++, oft++)
326 DM9000_iow(oft, 0xff);
328 /* read back mac, just to be sure */
329 for (i = 0, oft = 0x10; i < 6; i++, oft++)
330 DM9000_DBG("%02x:", DM9000_ior(oft));
333 /* Activate DM9000 */
334 DM9000_iow(DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN); /* RX enable */
335 DM9000_iow(DM9000_IMR, IMR_PAR); /* Enable TX/RX interrupt mask */
337 while (!(phy_read(1) & 0x20)) { /* autonegation complete bit */
341 printf("could not establish link\n");
346 /* see what we've got */
347 lnk = phy_read(17) >> 12;
348 printf("operating at ");
351 printf("10M half duplex ");
354 printf("10M full duplex ");
357 printf("100M half duplex ");
360 printf("100M full duplex ");
363 printf("unknown: %d ", lnk);
371 Hardware start transmission.
372 Send a packet to media from the upper layer.
375 eth_send(volatile void *packet, int length)
380 DM9000_DBG("eth_send: length: %d\n", length);
381 for (i = 0; i < length; i++) {
383 DM9000_DBG("\nSend: 02x: ", i);
384 DM9000_DBG("%02x ", ((unsigned char *) packet)[i]);
387 /* Move data to DM9000 TX RAM */
388 data_ptr = (char *) packet;
389 DM9000_outb(DM9000_MWCMD, DM9000_IO);
391 #ifdef CONFIG_DM9000_USE_8BIT
393 for (i = 0; i < length; i++)
394 DM9000_outb((data_ptr[i] & 0xff), DM9000_DATA);
397 #ifdef CONFIG_DM9000_USE_16BIT
398 tmplen = (length + 1) / 2;
399 for (i = 0; i < tmplen; i++)
400 DM9000_outw(((u16 *) data_ptr)[i], DM9000_DATA);
403 #ifdef CONFIG_DM9000_USE_32BIT
404 tmplen = (length + 3) / 4;
405 for (i = 0; i < tmplen; i++)
406 DM9000_outl(((u32 *) data_ptr)[i], DM9000_DATA);
410 /* Set TX length to DM9000 */
411 DM9000_iow(DM9000_TXPLL, length & 0xff);
412 DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
414 /* Issue TX polling command */
415 DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
417 /* wait for end of transmission */
418 tmo = get_timer(0) + 5 * CFG_HZ;
419 while (DM9000_ior(DM9000_TCR) & TCR_TXREQ) {
420 if (get_timer(0) >= tmo) {
421 printf("transmission timeout\n");
425 DM9000_DBG("transmit done\n\n");
431 The interface is stopped when it is brought.
436 DM9000_DBG("eth_halt\n");
439 phy_write(0, 0x8000); /* PHY RESET */
440 DM9000_iow(DM9000_GPR, 0x01); /* Power-Down PHY */
441 DM9000_iow(DM9000_IMR, 0x80); /* Disable all interrupt */
442 DM9000_iow(DM9000_RCR, 0x00); /* Disable RX */
446 Received a packet and pass to upper layer
451 u8 rxbyte, *rdptr = (u8 *) NetRxPackets[0];
452 u16 RxStatus, RxLen = 0;
454 #ifdef CONFIG_DM9000_USE_32BIT
458 /* Check packet ready or not */
459 DM9000_ior(DM9000_MRCMDX); /* Dummy read */
460 rxbyte = DM9000_inb(DM9000_DATA); /* Got most updated data */
464 /* Status check: this byte must be 0 or 1 */
466 DM9000_iow(DM9000_RCR, 0x00); /* Stop Device */
467 DM9000_iow(DM9000_ISR, 0x80); /* Stop INT request */
468 DM9000_DBG("rx status check: %d\n", rxbyte);
470 DM9000_DBG("receiving packet\n");
472 /* A packet ready now & Get status/length */
473 DM9000_outb(DM9000_MRCMD, DM9000_IO);
475 #ifdef CONFIG_DM9000_USE_8BIT
476 RxStatus = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
477 RxLen = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
480 #ifdef CONFIG_DM9000_USE_16BIT
481 RxStatus = DM9000_inw(DM9000_DATA);
482 RxLen = DM9000_inw(DM9000_DATA);
485 #ifdef CONFIG_DM9000_USE_32BIT
486 tmpdata = DM9000_inl(DM9000_DATA);
488 RxLen = tmpdata >> 16;
491 DM9000_DBG("rx status: 0x%04x rx len: %d\n", RxStatus, RxLen);
493 /* Move data from DM9000 */
494 /* Read received packet from RX SRAM */
495 #ifdef CONFIG_DM9000_USE_8BIT
496 for (i = 0; i < RxLen; i++)
497 rdptr[i] = DM9000_inb(DM9000_DATA);
500 #ifdef CONFIG_DM9000_USE_16BIT
501 tmplen = (RxLen + 1) / 2;
502 for (i = 0; i < tmplen; i++)
503 ((u16 *) rdptr)[i] = DM9000_inw(DM9000_DATA);
506 #ifdef CONFIG_DM9000_USE_32BIT
507 tmplen = (RxLen + 3) / 4;
508 for (i = 0; i < tmplen; i++)
509 ((u32 *) rdptr)[i] = DM9000_inl(DM9000_DATA);
512 if ((RxStatus & 0xbf00) || (RxLen < 0x40)
513 || (RxLen > DM9000_PKT_MAX)) {
514 if (RxStatus & 0x100) {
515 printf("rx fifo error\n");
517 if (RxStatus & 0x200) {
518 printf("rx crc error\n");
520 if (RxStatus & 0x8000) {
521 printf("rx length error\n");
523 if (RxLen > DM9000_PKT_MAX) {
524 printf("rx length too big\n");
529 /* Pass to upper layer */
530 DM9000_DBG("passing packet to upper layer\n");
531 NetReceive(NetRxPackets[0], RxLen);
538 Read a word data from SROM
541 read_srom_word(int offset)
543 DM9000_iow(DM9000_EPAR, offset);
544 DM9000_iow(DM9000_EPCR, 0x4);
546 DM9000_iow(DM9000_EPCR, 0x0);
547 return (DM9000_ior(DM9000_EPDRL) + (DM9000_ior(DM9000_EPDRH) << 8));
551 write_srom_word(int offset, u16 val)
553 DM9000_iow(DM9000_EPAR, offset);
554 DM9000_iow(DM9000_EPDRH, ((val >> 8) & 0xff));
555 DM9000_iow(DM9000_EPDRL, (val & 0xff));
556 DM9000_iow(DM9000_EPCR, 0x12);
558 DM9000_iow(DM9000_EPCR, 0);
563 Read a byte from I/O port
568 DM9000_outb(reg, DM9000_IO);
569 return DM9000_inb(DM9000_DATA);
573 Write a byte to I/O port
576 DM9000_iow(int reg, u8 value)
578 DM9000_outb(reg, DM9000_IO);
579 DM9000_outb(value, DM9000_DATA);
583 Read a word from phyxcer
590 /* Fill the phyxcer register into REG_0C */
591 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
592 DM9000_iow(DM9000_EPCR, 0xc); /* Issue phyxcer read command */
593 udelay(100); /* Wait read complete */
594 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer read command */
595 val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);
597 /* The read data keeps on REG_0D & REG_0E */
598 DM9000_DBG("phy_read(%d): %d\n", reg, val);
603 Write a word to phyxcer
606 phy_write(int reg, u16 value)
609 /* Fill the phyxcer register into REG_0C */
610 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
612 /* Fill the written data into REG_0D & REG_0E */
613 DM9000_iow(DM9000_EPDRL, (value & 0xff));
614 DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));
615 DM9000_iow(DM9000_EPCR, 0xa); /* Issue phyxcer write command */
616 udelay(500); /* Wait write complete */
617 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer write command */
618 DM9000_DBG("phy_write(reg:%d, value:%d)\n", reg, value);
620 #endif /* CONFIG_DRIVER_DM9000 */