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
40 Sascha Hauer <saschahauer@web.de>
42 06/03/2008 Remy Bohmer <linux@bohmer.net>
43 - Fixed the driver to work with DM9000A.
44 (check on ISR receive status bit before reading the
45 FIFO as described in DM9000 programming guide and
47 - Added autodetect of databus width.
48 - Made debug code compile again.
49 - Adapt eth_send such that it matches the DM9000*
50 application notes. Needed to make it work properly
52 - Adapted reset procedure to match DM9000 application
53 notes (i.e. double reset)
54 - some minor code cleanups
55 These changes are tested with DM9000{A,EP,E} together
56 with a 200MHz Atmel AT91SAM92161 core
58 TODO: Homerun NIC and longrun NIC are not functional, only internal at the
69 /* Board/System/Debug information/definition ---------------- */
71 #define DM9801_NOISE_FLOOR 0x08
72 #define DM9802_NOISE_FLOOR 0x05
74 /* #define CONFIG_DM9000_DEBUG */
76 #ifdef CONFIG_DM9000_DEBUG
77 #define DM9000_DBG(fmt,args...) printf(fmt, ##args)
78 #define DM9000_DMP_PACKET(func,packet,length) \
81 printf(func ": length: %d\n", length); \
82 for (i = 0; i < length; i++) { \
84 printf("\n%s: %02x: ", func, i); \
85 printf("%02x ", ((unsigned char *) packet)[i]); \
89 #define DM9000_DBG(fmt,args...)
90 #define DM9000_DMP_PACKET(func,packet,length)
93 enum DM9000_PHY_mode { DM9000_10MHD = 0, DM9000_100MHD =
94 1, DM9000_10MFD = 4, DM9000_100MFD = 5, DM9000_AUTO =
95 8, DM9000_1M_HPNA = 0x10
97 enum DM9000_NIC_TYPE { FASTETHER_NIC = 0, HOMERUN_NIC = 1, LONGRUN_NIC = 2
100 /* Structure/enum declaration ------------------------------- */
101 typedef struct board_info {
102 u32 runt_length_counter; /* counter: RX length < 64byte */
103 u32 long_length_counter; /* counter: RX length > 1514byte */
104 u32 reset_counter; /* counter: RESET */
105 u32 reset_tx_timeout; /* RESET caused by TX Timeout */
106 u32 reset_rx_status; /* RESET caused by RX Statsus wrong */
108 u16 queue_start_addr;
111 u8 device_wait_reset; /* device state */
112 u8 nic_type; /* NIC type */
113 unsigned char srom[128];
114 void (*outblk)(volatile void *data_ptr, int count);
115 void (*inblk)(void *data_ptr, int count);
116 void (*rx_status)(u16 *RxStatus, u16 *RxLen);
118 static board_info_t dm9000_info;
120 /* For module input parameter */
121 static int media_mode = DM9000_AUTO;
122 static u8 nfloor = 0;
124 /* function declaration ------------------------------------- */
125 int eth_init(bd_t * bd);
126 int eth_send(volatile void *, int);
129 static int dm9000_probe(void);
130 static u16 phy_read(int);
131 static void phy_write(int, u16);
132 u16 read_srom_word(int);
133 static u8 DM9000_ior(int);
134 static void DM9000_iow(int reg, u8 value);
136 /* DM9000 network board routine ---------------------------- */
138 #define DM9000_outb(d,r) ( *(volatile u8 *)r = d )
139 #define DM9000_outw(d,r) ( *(volatile u16 *)r = d )
140 #define DM9000_outl(d,r) ( *(volatile u32 *)r = d )
141 #define DM9000_inb(r) (*(volatile u8 *)r)
142 #define DM9000_inw(r) (*(volatile u16 *)r)
143 #define DM9000_inl(r) (*(volatile u32 *)r)
145 #ifdef CONFIG_DM9000_DEBUG
150 DM9000_DBG("NCR (0x00): %02x\n", DM9000_ior(0));
151 DM9000_DBG("NSR (0x01): %02x\n", DM9000_ior(1));
152 DM9000_DBG("TCR (0x02): %02x\n", DM9000_ior(2));
153 DM9000_DBG("TSRI (0x03): %02x\n", DM9000_ior(3));
154 DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));
155 DM9000_DBG("RCR (0x05): %02x\n", DM9000_ior(5));
156 DM9000_DBG("RSR (0x06): %02x\n", DM9000_ior(6));
157 DM9000_DBG("ISR (0xFE): %02x\n", DM9000_ior(DM9000_ISR));
162 static void dm9000_outblk_8bit(volatile void *data_ptr, int count)
165 for (i = 0; i < count; i++)
166 DM9000_outb((((u8 *) data_ptr)[i] & 0xff), DM9000_DATA);
169 static void dm9000_outblk_16bit(volatile void *data_ptr, int count)
172 u32 tmplen = (count + 1) / 2;
174 for (i = 0; i < tmplen; i++)
175 DM9000_outw(((u16 *) data_ptr)[i], DM9000_DATA);
177 static void dm9000_outblk_32bit(volatile void *data_ptr, int count)
180 u32 tmplen = (count + 3) / 4;
182 for (i = 0; i < tmplen; i++)
183 DM9000_outl(((u32 *) data_ptr)[i], DM9000_DATA);
186 static void dm9000_inblk_8bit(void *data_ptr, int count)
189 for (i = 0; i < count; i++)
190 ((u8 *) data_ptr)[i] = DM9000_inb(DM9000_DATA);
193 static void dm9000_inblk_16bit(void *data_ptr, int count)
196 u32 tmplen = (count + 1) / 2;
198 for (i = 0; i < tmplen; i++)
199 ((u16 *) data_ptr)[i] = DM9000_inw(DM9000_DATA);
201 static void dm9000_inblk_32bit(void *data_ptr, int count)
204 u32 tmplen = (count + 3) / 4;
206 for (i = 0; i < tmplen; i++)
207 ((u32 *) data_ptr)[i] = DM9000_inl(DM9000_DATA);
210 static void dm9000_rx_status_32bit(u16 *RxStatus, u16 *RxLen)
214 DM9000_outb(DM9000_MRCMD, DM9000_IO);
216 tmpdata = DM9000_inl(DM9000_DATA);
217 *RxStatus = __le16_to_cpu(tmpdata);
218 *RxLen = __le16_to_cpu(tmpdata >> 16);
221 static void dm9000_rx_status_16bit(u16 *RxStatus, u16 *RxLen)
223 DM9000_outb(DM9000_MRCMD, DM9000_IO);
225 *RxStatus = __le16_to_cpu(DM9000_inw(DM9000_DATA));
226 *RxLen = __le16_to_cpu(DM9000_inw(DM9000_DATA));
229 static void dm9000_rx_status_8bit(u16 *RxStatus, u16 *RxLen)
231 DM9000_outb(DM9000_MRCMD, DM9000_IO);
234 __le16_to_cpu(DM9000_inb(DM9000_DATA) +
235 (DM9000_inb(DM9000_DATA) << 8));
237 __le16_to_cpu(DM9000_inb(DM9000_DATA) +
238 (DM9000_inb(DM9000_DATA) << 8));
242 Search DM9000 board, allocate space and register it
248 id_val = DM9000_ior(DM9000_VIDL);
249 id_val |= DM9000_ior(DM9000_VIDH) << 8;
250 id_val |= DM9000_ior(DM9000_PIDL) << 16;
251 id_val |= DM9000_ior(DM9000_PIDH) << 24;
252 if (id_val == DM9000_ID) {
253 printf("dm9000 i/o: 0x%x, id: 0x%x \n", CONFIG_DM9000_BASE,
257 printf("dm9000 not found at 0x%08x id: 0x%08x\n",
258 CONFIG_DM9000_BASE, id_val);
263 /* Set PHY operationg mode
268 u16 phy_reg4 = 0x01e1, phy_reg0 = 0x1000;
269 if (!(media_mode & DM9000_AUTO)) {
270 switch (media_mode) {
288 phy_write(4, phy_reg4); /* Set PHY media mode */
289 phy_write(0, phy_reg0); /* Tmp */
291 DM9000_iow(DM9000_GPCR, 0x01); /* Let GPIO0 output */
292 DM9000_iow(DM9000_GPR, 0x00); /* Enable PHY */
299 program_dm9801(u16 HPNA_rev)
301 __u16 reg16, reg17, reg24, reg25;
303 nfloor = DM9801_NOISE_FLOOR;
304 reg16 = phy_read(16);
305 reg17 = phy_read(17);
306 reg24 = phy_read(24);
307 reg25 = phy_read(25);
309 case 0xb900: /* DM9801 E3 */
311 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xf000;
313 case 0xb901: /* DM9801 E4 */
314 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xc200;
315 reg17 = (reg17 & 0xfff0) + nfloor + 3;
317 case 0xb902: /* DM9801 E5 */
318 case 0xb903: /* DM9801 E6 */
321 reg25 = ((reg24 + nfloor - 3) & 0x00ff) | 0xc200;
322 reg17 = (reg17 & 0xfff0) + nfloor;
324 phy_write(16, reg16);
325 phy_write(17, reg17);
326 phy_write(25, reg25);
337 nfloor = DM9802_NOISE_FLOOR;
338 reg25 = phy_read(25);
339 reg25 = (reg25 & 0xff00) + nfloor;
340 phy_write(25, reg25);
348 struct board_info *db = &dm9000_info;
350 DM9000_iow(DM9000_NCR, NCR_EXT_PHY);
351 phy_reg3 = phy_read(3);
352 switch (phy_reg3 & 0xfff0) {
354 if (phy_read(31) == 0x4404) {
355 db->nic_type = HOMERUN_NIC;
356 program_dm9801(phy_reg3);
357 DM9000_DBG("found homerun NIC\n");
359 db->nic_type = LONGRUN_NIC;
360 DM9000_DBG("found longrun NIC\n");
365 db->nic_type = FASTETHER_NIC;
368 DM9000_iow(DM9000_NCR, 0);
371 /* General Purpose dm9000 reset routine */
375 DM9000_DBG("resetting DM9000\n");
378 see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 */
380 /* DEBUG: Make all GPIO pins outputs */
381 DM9000_iow(DM9000_GPCR, 0x0F);
382 /* Step 1: Power internal PHY by writing 0 to GPIO0 pin */
383 DM9000_iow(DM9000_GPR, 0);
384 /* Step 2: Software reset */
385 DM9000_iow(DM9000_NCR, 3);
388 DM9000_DBG("resetting the DM9000, 1st reset\n");
389 udelay(25); /* Wait at least 20 us */
390 } while (DM9000_ior(DM9000_NCR) & 1);
392 DM9000_iow(DM9000_NCR, 0);
393 DM9000_iow(DM9000_NCR, 3); /* Issue a second reset */
396 DM9000_DBG("resetting the DM9000, 2nd reset\n");
397 udelay(25); /* Wait at least 20 us */
398 } while (DM9000_ior(DM9000_NCR) & 1);
400 /* Check whether the ethernet controller is present */
401 if ((DM9000_ior(DM9000_PIDL) != 0x0) ||
402 (DM9000_ior(DM9000_PIDH) != 0x90))
403 printf("ERROR: resetting DM9000 -> not responding\n");
406 /* Initilize dm9000 board
413 struct board_info *db = &dm9000_info;
415 DM9000_DBG("eth_init()\n");
421 /* Auto-detect 8/16/32 bit mode, ISR Bit 6+7 indicate bus width */
422 io_mode = DM9000_ior(DM9000_ISR) >> 6;
425 case 0x0: /* 16-bit mode */
426 printf("DM9000: running in 16 bit mode\n");
427 db->outblk = dm9000_outblk_16bit;
428 db->inblk = dm9000_inblk_16bit;
429 db->rx_status = dm9000_rx_status_16bit;
431 case 0x01: /* 32-bit mode */
432 printf("DM9000: running in 32 bit mode\n");
433 db->outblk = dm9000_outblk_32bit;
434 db->inblk = dm9000_inblk_32bit;
435 db->rx_status = dm9000_rx_status_32bit;
437 case 0x02: /* 8 bit mode */
438 printf("DM9000: running in 8 bit mode\n");
439 db->outblk = dm9000_outblk_8bit;
440 db->inblk = dm9000_inblk_8bit;
441 db->rx_status = dm9000_rx_status_8bit;
444 /* Assume 8 bit mode, will probably not work anyway */
445 printf("DM9000: Undefined IO-mode:0x%x\n", io_mode);
446 db->outblk = dm9000_outblk_8bit;
447 db->inblk = dm9000_inblk_8bit;
448 db->rx_status = dm9000_rx_status_8bit;
452 /* NIC Type: FASTETHER, HOMERUN, LONGRUN */
455 /* GPIO0 on pre-activate PHY */
456 DM9000_iow(DM9000_GPR, 0x00); /*REG_1F bit0 activate phyxcer */
461 /* Program operating register, only intern phy supported by now */
462 DM9000_iow(DM9000_NCR, 0x0);
463 /* TX Polling clear */
464 DM9000_iow(DM9000_TCR, 0);
465 /* Less 3Kb, 200us */
466 DM9000_iow(DM9000_BPTR, 0x3f);
467 /* Flow Control : High/Low Water */
468 DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8));
469 /* SH FIXME: This looks strange! Flow Control */
470 DM9000_iow(DM9000_FCR, 0x0);
472 DM9000_iow(DM9000_SMCR, 0);
473 /* clear TX status */
474 DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
475 /* Clear interrupt status */
476 DM9000_iow(DM9000_ISR, 0x0f);
478 /* Set Node address */
479 #ifndef CONFIG_AT91SAM9261EK
480 for (i = 0; i < 6; i++)
481 ((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i);
484 if (is_zero_ether_addr(bd->bi_enetaddr) ||
485 is_multicast_ether_addr(bd->bi_enetaddr)) {
486 /* try reading from environment */
489 s = getenv ("ethaddr");
490 for (i = 0; i < 6; ++i) {
491 bd->bi_enetaddr[i] = s ?
492 simple_strtoul (s, &e, 16) : 0;
494 s = (*e) ? e + 1 : e;
498 printf("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", bd->bi_enetaddr[0],
499 bd->bi_enetaddr[1], bd->bi_enetaddr[2], bd->bi_enetaddr[3],
500 bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
501 for (i = 0, oft = 0x10; i < 6; i++, oft++)
502 DM9000_iow(oft, bd->bi_enetaddr[i]);
503 for (i = 0, oft = 0x16; i < 8; i++, oft++)
504 DM9000_iow(oft, 0xff);
506 /* read back mac, just to be sure */
507 for (i = 0, oft = 0x10; i < 6; i++, oft++)
508 DM9000_DBG("%02x:", DM9000_ior(oft));
511 /* Activate DM9000 */
513 DM9000_iow(DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
514 /* Enable TX/RX interrupt mask */
515 DM9000_iow(DM9000_IMR, IMR_PAR);
518 while (!(phy_read(1) & 0x20)) { /* autonegation complete bit */
522 printf("could not establish link\n");
527 /* see what we've got */
528 lnk = phy_read(17) >> 12;
529 printf("operating at ");
532 printf("10M half duplex ");
535 printf("10M full duplex ");
538 printf("100M half duplex ");
541 printf("100M full duplex ");
544 printf("unknown: %d ", lnk);
552 Hardware start transmission.
553 Send a packet to media from the upper layer.
556 eth_send(volatile void *packet, int length)
559 struct board_info *db = &dm9000_info;
561 DM9000_DMP_PACKET("eth_send", packet, length);
563 DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
565 /* Move data to DM9000 TX RAM */
566 DM9000_outb(DM9000_MWCMD, DM9000_IO); /* Prepare for TX-data */
568 /* push the data to the TX-fifo */
569 (db->outblk)(packet, length);
571 /* Set TX length to DM9000 */
572 DM9000_iow(DM9000_TXPLL, length & 0xff);
573 DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
575 /* Issue TX polling command */
576 DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
578 /* wait for end of transmission */
579 tmo = get_timer(0) + 5 * CFG_HZ;
580 while ( !(DM9000_ior(DM9000_NSR) & (NSR_TX1END | NSR_TX2END)) ||
581 !(DM9000_ior(DM9000_ISR) & IMR_PTM) ) {
582 if (get_timer(0) >= tmo) {
583 printf("transmission timeout\n");
587 DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
589 DM9000_DBG("transmit done\n\n");
595 The interface is stopped when it is brought.
600 DM9000_DBG("eth_halt\n");
603 phy_write(0, 0x8000); /* PHY RESET */
604 DM9000_iow(DM9000_GPR, 0x01); /* Power-Down PHY */
605 DM9000_iow(DM9000_IMR, 0x80); /* Disable all interrupt */
606 DM9000_iow(DM9000_RCR, 0x00); /* Disable RX */
610 Received a packet and pass to upper layer
615 u8 rxbyte, *rdptr = (u8 *) NetRxPackets[0];
616 u16 RxStatus, RxLen = 0;
617 struct board_info *db = &dm9000_info;
619 /* Check packet ready or not, we must check
620 the ISR status first for DM9000A */
621 if (!(DM9000_ior(DM9000_ISR) & 0x01)) /* Rx-ISR bit must be set. */
624 DM9000_iow(DM9000_ISR, 0x01); /* clear PR status latched in bit 0 */
626 /* There is _at least_ 1 package in the fifo, read them all */
628 DM9000_ior(DM9000_MRCMDX); /* Dummy read */
630 /* Get most updated data,
631 only look at bits 0:1, See application notes DM9000 */
632 rxbyte = DM9000_inb(DM9000_DATA) & 0x03;
634 /* Status check: this byte must be 0 or 1 */
635 if (rxbyte > DM9000_PKT_RDY) {
636 DM9000_iow(DM9000_RCR, 0x00); /* Stop Device */
637 DM9000_iow(DM9000_ISR, 0x80); /* Stop INT request */
638 printf("DM9000 error: status check fail: 0x%x\n",
643 if (rxbyte != DM9000_PKT_RDY)
644 return 0; /* No packet received, ignore */
646 DM9000_DBG("receiving packet\n");
648 /* A packet ready now & Get status/length */
649 (db->rx_status)(&RxStatus, &RxLen);
651 DM9000_DBG("rx status: 0x%04x rx len: %d\n", RxStatus, RxLen);
653 /* Move data from DM9000 */
654 /* Read received packet from RX SRAM */
655 (db->inblk)(rdptr, RxLen);
657 if ((RxStatus & 0xbf00) || (RxLen < 0x40)
658 || (RxLen > DM9000_PKT_MAX)) {
659 if (RxStatus & 0x100) {
660 printf("rx fifo error\n");
662 if (RxStatus & 0x200) {
663 printf("rx crc error\n");
665 if (RxStatus & 0x8000) {
666 printf("rx length error\n");
668 if (RxLen > DM9000_PKT_MAX) {
669 printf("rx length too big\n");
673 DM9000_DMP_PACKET("eth_rx", rdptr, RxLen);
675 DM9000_DBG("passing packet to upper layer\n");
676 NetReceive(NetRxPackets[0], RxLen);
683 Read a word data from SROM
686 read_srom_word(int offset)
688 DM9000_iow(DM9000_EPAR, offset);
689 DM9000_iow(DM9000_EPCR, 0x4);
691 DM9000_iow(DM9000_EPCR, 0x0);
692 return (DM9000_ior(DM9000_EPDRL) + (DM9000_ior(DM9000_EPDRH) << 8));
696 write_srom_word(int offset, u16 val)
698 DM9000_iow(DM9000_EPAR, offset);
699 DM9000_iow(DM9000_EPDRH, ((val >> 8) & 0xff));
700 DM9000_iow(DM9000_EPDRL, (val & 0xff));
701 DM9000_iow(DM9000_EPCR, 0x12);
703 DM9000_iow(DM9000_EPCR, 0);
708 Read a byte from I/O port
713 DM9000_outb(reg, DM9000_IO);
714 return DM9000_inb(DM9000_DATA);
718 Write a byte to I/O port
721 DM9000_iow(int reg, u8 value)
723 DM9000_outb(reg, DM9000_IO);
724 DM9000_outb(value, DM9000_DATA);
728 Read a word from phyxcer
735 /* Fill the phyxcer register into REG_0C */
736 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
737 DM9000_iow(DM9000_EPCR, 0xc); /* Issue phyxcer read command */
738 udelay(100); /* Wait read complete */
739 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer read command */
740 val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);
742 /* The read data keeps on REG_0D & REG_0E */
743 DM9000_DBG("phy_read(0x%x): 0x%x\n", reg, val);
748 Write a word to phyxcer
751 phy_write(int reg, u16 value)
754 /* Fill the phyxcer register into REG_0C */
755 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
757 /* Fill the written data into REG_0D & REG_0E */
758 DM9000_iow(DM9000_EPDRL, (value & 0xff));
759 DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));
760 DM9000_iow(DM9000_EPCR, 0xa); /* Issue phyxcer write command */
761 udelay(500); /* Wait write complete */
762 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer write command */
763 DM9000_DBG("phy_write(reg:0x%x, value:0x%x)\n", reg, value);