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
67 #ifdef CONFIG_DRIVER_DM9000
71 /* Board/System/Debug information/definition ---------------- */
73 #define DM9801_NOISE_FLOOR 0x08
74 #define DM9802_NOISE_FLOOR 0x05
76 /* #define CONFIG_DM9000_DEBUG */
78 #ifdef CONFIG_DM9000_DEBUG
79 #define DM9000_DBG(fmt,args...) printf(fmt, ##args)
80 #define DM9000_DMP_PACKET(func,packet,length) \
83 printf(func ": length: %d\n", length); \
84 for (i = 0; i < length; i++) { \
86 printf("\n%s: %02x: ", func, i); \
87 printf("%02x ", ((unsigned char *) packet)[i]); \
91 #define DM9000_DBG(fmt,args...)
92 #define DM9000_DMP_PACKET(func,packet,length)
95 enum DM9000_PHY_mode { DM9000_10MHD = 0, DM9000_100MHD =
96 1, DM9000_10MFD = 4, DM9000_100MFD = 5, DM9000_AUTO =
97 8, DM9000_1M_HPNA = 0x10
99 enum DM9000_NIC_TYPE { FASTETHER_NIC = 0, HOMERUN_NIC = 1, LONGRUN_NIC = 2
102 /* Structure/enum declaration ------------------------------- */
103 typedef struct board_info {
104 u32 runt_length_counter; /* counter: RX length < 64byte */
105 u32 long_length_counter; /* counter: RX length > 1514byte */
106 u32 reset_counter; /* counter: RESET */
107 u32 reset_tx_timeout; /* RESET caused by TX Timeout */
108 u32 reset_rx_status; /* RESET caused by RX Statsus wrong */
110 u16 queue_start_addr;
113 u8 device_wait_reset; /* device state */
114 u8 nic_type; /* NIC type */
115 unsigned char srom[128];
116 void (*outblk)(volatile void *data_ptr, int count);
117 void (*inblk)(void *data_ptr, int count);
118 void (*rx_status)(u16 *RxStatus, u16 *RxLen);
120 static board_info_t dm9000_info;
122 /* For module input parameter */
123 static int media_mode = DM9000_AUTO;
124 static u8 nfloor = 0;
126 /* function declaration ------------------------------------- */
127 int eth_init(bd_t * bd);
128 int eth_send(volatile void *, int);
131 static int dm9000_probe(void);
132 static u16 phy_read(int);
133 static void phy_write(int, u16);
134 u16 read_srom_word(int);
135 static u8 DM9000_ior(int);
136 static void DM9000_iow(int reg, u8 value);
138 /* DM9000 network board routine ---------------------------- */
140 #define DM9000_outb(d,r) ( *(volatile u8 *)r = d )
141 #define DM9000_outw(d,r) ( *(volatile u16 *)r = d )
142 #define DM9000_outl(d,r) ( *(volatile u32 *)r = d )
143 #define DM9000_inb(r) (*(volatile u8 *)r)
144 #define DM9000_inw(r) (*(volatile u16 *)r)
145 #define DM9000_inl(r) (*(volatile u32 *)r)
147 #ifdef CONFIG_DM9000_DEBUG
152 DM9000_DBG("NCR (0x00): %02x\n", DM9000_ior(0));
153 DM9000_DBG("NSR (0x01): %02x\n", DM9000_ior(1));
154 DM9000_DBG("TCR (0x02): %02x\n", DM9000_ior(2));
155 DM9000_DBG("TSRI (0x03): %02x\n", DM9000_ior(3));
156 DM9000_DBG("TSRII (0x04): %02x\n", DM9000_ior(4));
157 DM9000_DBG("RCR (0x05): %02x\n", DM9000_ior(5));
158 DM9000_DBG("RSR (0x06): %02x\n", DM9000_ior(6));
159 DM9000_DBG("ISR (0xFE): %02x\n", DM9000_ior(DM9000_ISR));
164 static void dm9000_outblk_8bit(volatile void *data_ptr, int count)
167 for (i = 0; i < count; i++)
168 DM9000_outb((((u8 *) data_ptr)[i] & 0xff), DM9000_DATA);
171 static void dm9000_outblk_16bit(volatile void *data_ptr, int count)
174 u32 tmplen = (count + 1) / 2;
176 for (i = 0; i < tmplen; i++)
177 DM9000_outw(((u16 *) data_ptr)[i], DM9000_DATA);
179 static void dm9000_outblk_32bit(volatile void *data_ptr, int count)
182 u32 tmplen = (count + 3) / 4;
184 for (i = 0; i < tmplen; i++)
185 DM9000_outl(((u32 *) data_ptr)[i], DM9000_DATA);
188 static void dm9000_inblk_8bit(void *data_ptr, int count)
191 for (i = 0; i < count; i++)
192 ((u8 *) data_ptr)[i] = DM9000_inb(DM9000_DATA);
195 static void dm9000_inblk_16bit(void *data_ptr, int count)
198 u32 tmplen = (count + 1) / 2;
200 for (i = 0; i < tmplen; i++)
201 ((u16 *) data_ptr)[i] = DM9000_inw(DM9000_DATA);
203 static void dm9000_inblk_32bit(void *data_ptr, int count)
206 u32 tmplen = (count + 3) / 4;
208 for (i = 0; i < tmplen; i++)
209 ((u32 *) data_ptr)[i] = DM9000_inl(DM9000_DATA);
212 static void dm9000_rx_status_32bit(u16 *RxStatus, u16 *RxLen)
216 DM9000_outb(DM9000_MRCMD, DM9000_IO);
218 tmpdata = DM9000_inl(DM9000_DATA);
220 *RxLen = tmpdata >> 16;
223 static void dm9000_rx_status_16bit(u16 *RxStatus, u16 *RxLen)
225 DM9000_outb(DM9000_MRCMD, DM9000_IO);
227 *RxStatus = DM9000_inw(DM9000_DATA);
228 *RxLen = DM9000_inw(DM9000_DATA);
231 static void dm9000_rx_status_8bit(u16 *RxStatus, u16 *RxLen)
233 DM9000_outb(DM9000_MRCMD, DM9000_IO);
235 *RxStatus = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
236 *RxLen = DM9000_inb(DM9000_DATA) + (DM9000_inb(DM9000_DATA) << 8);
240 Search DM9000 board, allocate space and register it
246 id_val = DM9000_ior(DM9000_VIDL);
247 id_val |= DM9000_ior(DM9000_VIDH) << 8;
248 id_val |= DM9000_ior(DM9000_PIDL) << 16;
249 id_val |= DM9000_ior(DM9000_PIDH) << 24;
250 if (id_val == DM9000_ID) {
251 printf("dm9000 i/o: 0x%x, id: 0x%x \n", CONFIG_DM9000_BASE,
255 printf("dm9000 not found at 0x%08x id: 0x%08x\n",
256 CONFIG_DM9000_BASE, id_val);
261 /* Set PHY operationg mode
266 u16 phy_reg4 = 0x01e1, phy_reg0 = 0x1000;
267 if (!(media_mode & DM9000_AUTO)) {
268 switch (media_mode) {
286 phy_write(4, phy_reg4); /* Set PHY media mode */
287 phy_write(0, phy_reg0); /* Tmp */
289 DM9000_iow(DM9000_GPCR, 0x01); /* Let GPIO0 output */
290 DM9000_iow(DM9000_GPR, 0x00); /* Enable PHY */
297 program_dm9801(u16 HPNA_rev)
299 __u16 reg16, reg17, reg24, reg25;
301 nfloor = DM9801_NOISE_FLOOR;
302 reg16 = phy_read(16);
303 reg17 = phy_read(17);
304 reg24 = phy_read(24);
305 reg25 = phy_read(25);
307 case 0xb900: /* DM9801 E3 */
309 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xf000;
311 case 0xb901: /* DM9801 E4 */
312 reg25 = ((reg24 + nfloor) & 0x00ff) | 0xc200;
313 reg17 = (reg17 & 0xfff0) + nfloor + 3;
315 case 0xb902: /* DM9801 E5 */
316 case 0xb903: /* DM9801 E6 */
319 reg25 = ((reg24 + nfloor - 3) & 0x00ff) | 0xc200;
320 reg17 = (reg17 & 0xfff0) + nfloor;
322 phy_write(16, reg16);
323 phy_write(17, reg17);
324 phy_write(25, reg25);
335 nfloor = DM9802_NOISE_FLOOR;
336 reg25 = phy_read(25);
337 reg25 = (reg25 & 0xff00) + nfloor;
338 phy_write(25, reg25);
346 struct board_info *db = &dm9000_info;
348 DM9000_iow(DM9000_NCR, NCR_EXT_PHY);
349 phy_reg3 = phy_read(3);
350 switch (phy_reg3 & 0xfff0) {
352 if (phy_read(31) == 0x4404) {
353 db->nic_type = HOMERUN_NIC;
354 program_dm9801(phy_reg3);
355 DM9000_DBG("found homerun NIC\n");
357 db->nic_type = LONGRUN_NIC;
358 DM9000_DBG("found longrun NIC\n");
363 db->nic_type = FASTETHER_NIC;
366 DM9000_iow(DM9000_NCR, 0);
369 /* General Purpose dm9000 reset routine */
373 DM9000_DBG("resetting DM9000\n");
376 see DM9000 Application Notes V1.22 Jun 11, 2004 page 29 */
378 /* DEBUG: Make all GPIO pins outputs */
379 DM9000_iow(DM9000_GPCR, 0x0F);
380 /* Step 1: Power internal PHY by writing 0 to GPIO0 pin */
381 DM9000_iow(DM9000_GPR, 0);
382 /* Step 2: Software reset */
383 DM9000_iow(DM9000_NCR, 3);
386 DM9000_DBG("resetting the DM9000, 1st reset\n");
387 udelay(25); /* Wait at least 20 us */
388 } while (DM9000_ior(DM9000_NCR) & 1);
390 DM9000_iow(DM9000_NCR, 0);
391 DM9000_iow(DM9000_NCR, 3); /* Issue a second reset */
394 DM9000_DBG("resetting the DM9000, 2nd reset\n");
395 udelay(25); /* Wait at least 20 us */
396 } while (DM9000_ior(DM9000_NCR) & 1);
398 /* Check whether the ethernet controller is present */
399 if ((DM9000_ior(DM9000_PIDL) != 0x0) ||
400 (DM9000_ior(DM9000_PIDH) != 0x90))
401 printf("ERROR: resetting DM9000 -> not responding\n");
404 /* Initilize dm9000 board
411 struct board_info *db = &dm9000_info;
413 DM9000_DBG("eth_init()\n");
419 /* Auto-detect 8/16/32 bit mode, ISR Bit 6+7 indicate bus width */
420 io_mode = DM9000_ior(DM9000_ISR) >> 6;
423 case 0x0: /* 16-bit mode */
424 printf("DM9000: running in 16 bit mode\n");
425 db->outblk = dm9000_outblk_16bit;
426 db->inblk = dm9000_inblk_16bit;
427 db->rx_status = dm9000_rx_status_16bit;
429 case 0x01: /* 32-bit mode */
430 printf("DM9000: running in 32 bit mode\n");
431 db->outblk = dm9000_outblk_32bit;
432 db->inblk = dm9000_inblk_32bit;
433 db->rx_status = dm9000_rx_status_32bit;
435 case 0x02: /* 8 bit mode */
436 printf("DM9000: running in 8 bit mode\n");
437 db->outblk = dm9000_outblk_8bit;
438 db->inblk = dm9000_inblk_8bit;
439 db->rx_status = dm9000_rx_status_8bit;
442 /* Assume 8 bit mode, will probably not work anyway */
443 printf("DM9000: Undefined IO-mode:0x%x\n", io_mode);
444 db->outblk = dm9000_outblk_8bit;
445 db->inblk = dm9000_inblk_8bit;
446 db->rx_status = dm9000_rx_status_8bit;
450 /* NIC Type: FASTETHER, HOMERUN, LONGRUN */
453 /* GPIO0 on pre-activate PHY */
454 DM9000_iow(DM9000_GPR, 0x00); /*REG_1F bit0 activate phyxcer */
459 /* Program operating register, only intern phy supported by now */
460 DM9000_iow(DM9000_NCR, 0x0);
461 /* TX Polling clear */
462 DM9000_iow(DM9000_TCR, 0);
463 /* Less 3Kb, 200us */
464 DM9000_iow(DM9000_BPTR, 0x3f);
465 /* Flow Control : High/Low Water */
466 DM9000_iow(DM9000_FCTR, FCTR_HWOT(3) | FCTR_LWOT(8));
467 /* SH FIXME: This looks strange! Flow Control */
468 DM9000_iow(DM9000_FCR, 0x0);
470 DM9000_iow(DM9000_SMCR, 0);
471 /* clear TX status */
472 DM9000_iow(DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
473 /* Clear interrupt status */
474 DM9000_iow(DM9000_ISR, 0x0f);
476 /* Set Node address */
477 #ifndef CONFIG_AT91SAM9261EK
478 for (i = 0; i < 6; i++)
479 ((u16 *) bd->bi_enetaddr)[i] = read_srom_word(i);
482 if (is_zero_ether_addr(bd->bi_enetaddr) ||
483 is_multicast_ether_addr(bd->bi_enetaddr)) {
484 /* try reading from environment */
487 s = getenv ("ethaddr");
488 for (i = 0; i < 6; ++i) {
489 bd->bi_enetaddr[i] = s ?
490 simple_strtoul (s, &e, 16) : 0;
492 s = (*e) ? e + 1 : e;
496 printf("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", bd->bi_enetaddr[0],
497 bd->bi_enetaddr[1], bd->bi_enetaddr[2], bd->bi_enetaddr[3],
498 bd->bi_enetaddr[4], bd->bi_enetaddr[5]);
499 for (i = 0, oft = 0x10; i < 6; i++, oft++)
500 DM9000_iow(oft, bd->bi_enetaddr[i]);
501 for (i = 0, oft = 0x16; i < 8; i++, oft++)
502 DM9000_iow(oft, 0xff);
504 /* read back mac, just to be sure */
505 for (i = 0, oft = 0x10; i < 6; i++, oft++)
506 DM9000_DBG("%02x:", DM9000_ior(oft));
509 /* Activate DM9000 */
511 DM9000_iow(DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
512 /* Enable TX/RX interrupt mask */
513 DM9000_iow(DM9000_IMR, IMR_PAR);
516 while (!(phy_read(1) & 0x20)) { /* autonegation complete bit */
520 printf("could not establish link\n");
525 /* see what we've got */
526 lnk = phy_read(17) >> 12;
527 printf("operating at ");
530 printf("10M half duplex ");
533 printf("10M full duplex ");
536 printf("100M half duplex ");
539 printf("100M full duplex ");
542 printf("unknown: %d ", lnk);
550 Hardware start transmission.
551 Send a packet to media from the upper layer.
554 eth_send(volatile void *packet, int length)
557 struct board_info *db = &dm9000_info;
559 DM9000_DMP_PACKET("eth_send", packet, length);
561 DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
563 /* Move data to DM9000 TX RAM */
564 DM9000_outb(DM9000_MWCMD, DM9000_IO); /* Prepare for TX-data */
566 /* push the data to the TX-fifo */
567 (db->outblk)(packet, length);
569 /* Set TX length to DM9000 */
570 DM9000_iow(DM9000_TXPLL, length & 0xff);
571 DM9000_iow(DM9000_TXPLH, (length >> 8) & 0xff);
573 /* Issue TX polling command */
574 DM9000_iow(DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
576 /* wait for end of transmission */
577 tmo = get_timer(0) + 5 * CFG_HZ;
578 while ( !(DM9000_ior(DM9000_NSR) & (NSR_TX1END | NSR_TX2END)) ||
579 !(DM9000_ior(DM9000_ISR) & IMR_PTM) ) {
580 if (get_timer(0) >= tmo) {
581 printf("transmission timeout\n");
585 DM9000_iow(DM9000_ISR, IMR_PTM); /* Clear Tx bit in ISR */
587 DM9000_DBG("transmit done\n\n");
593 The interface is stopped when it is brought.
598 DM9000_DBG("eth_halt\n");
601 phy_write(0, 0x8000); /* PHY RESET */
602 DM9000_iow(DM9000_GPR, 0x01); /* Power-Down PHY */
603 DM9000_iow(DM9000_IMR, 0x80); /* Disable all interrupt */
604 DM9000_iow(DM9000_RCR, 0x00); /* Disable RX */
608 Received a packet and pass to upper layer
613 u8 rxbyte, *rdptr = (u8 *) NetRxPackets[0];
614 u16 RxStatus, RxLen = 0;
615 struct board_info *db = &dm9000_info;
617 /* Check packet ready or not, we must check
618 the ISR status first for DM9000A */
619 if (!(DM9000_ior(DM9000_ISR) & 0x01)) /* Rx-ISR bit must be set. */
622 DM9000_iow(DM9000_ISR, 0x01); /* clear PR status latched in bit 0 */
624 /* There is _at least_ 1 package in the fifo, read them all */
626 DM9000_ior(DM9000_MRCMDX); /* Dummy read */
628 /* Get most updated data,
629 only look at bits 0:1, See application notes DM9000 */
630 rxbyte = DM9000_inb(DM9000_DATA) & 0x03;
632 /* Status check: this byte must be 0 or 1 */
633 if (rxbyte > DM9000_PKT_RDY) {
634 DM9000_iow(DM9000_RCR, 0x00); /* Stop Device */
635 DM9000_iow(DM9000_ISR, 0x80); /* Stop INT request */
636 printf("DM9000 error: status check fail: 0x%x\n",
641 if (rxbyte != DM9000_PKT_RDY)
642 return 0; /* No packet received, ignore */
644 DM9000_DBG("receiving packet\n");
646 /* A packet ready now & Get status/length */
647 (db->rx_status)(&RxStatus, &RxLen);
649 DM9000_DBG("rx status: 0x%04x rx len: %d\n", RxStatus, RxLen);
651 /* Move data from DM9000 */
652 /* Read received packet from RX SRAM */
653 (db->inblk)(rdptr, RxLen);
655 if ((RxStatus & 0xbf00) || (RxLen < 0x40)
656 || (RxLen > DM9000_PKT_MAX)) {
657 if (RxStatus & 0x100) {
658 printf("rx fifo error\n");
660 if (RxStatus & 0x200) {
661 printf("rx crc error\n");
663 if (RxStatus & 0x8000) {
664 printf("rx length error\n");
666 if (RxLen > DM9000_PKT_MAX) {
667 printf("rx length too big\n");
671 DM9000_DMP_PACKET("eth_rx", rdptr, RxLen);
673 DM9000_DBG("passing packet to upper layer\n");
674 NetReceive(NetRxPackets[0], RxLen);
681 Read a word data from SROM
684 read_srom_word(int offset)
686 DM9000_iow(DM9000_EPAR, offset);
687 DM9000_iow(DM9000_EPCR, 0x4);
689 DM9000_iow(DM9000_EPCR, 0x0);
690 return (DM9000_ior(DM9000_EPDRL) + (DM9000_ior(DM9000_EPDRH) << 8));
694 write_srom_word(int offset, u16 val)
696 DM9000_iow(DM9000_EPAR, offset);
697 DM9000_iow(DM9000_EPDRH, ((val >> 8) & 0xff));
698 DM9000_iow(DM9000_EPDRL, (val & 0xff));
699 DM9000_iow(DM9000_EPCR, 0x12);
701 DM9000_iow(DM9000_EPCR, 0);
706 Read a byte from I/O port
711 DM9000_outb(reg, DM9000_IO);
712 return DM9000_inb(DM9000_DATA);
716 Write a byte to I/O port
719 DM9000_iow(int reg, u8 value)
721 DM9000_outb(reg, DM9000_IO);
722 DM9000_outb(value, DM9000_DATA);
726 Read a word from phyxcer
733 /* Fill the phyxcer register into REG_0C */
734 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
735 DM9000_iow(DM9000_EPCR, 0xc); /* Issue phyxcer read command */
736 udelay(100); /* Wait read complete */
737 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer read command */
738 val = (DM9000_ior(DM9000_EPDRH) << 8) | DM9000_ior(DM9000_EPDRL);
740 /* The read data keeps on REG_0D & REG_0E */
741 DM9000_DBG("phy_read(0x%x): 0x%x\n", reg, val);
746 Write a word to phyxcer
749 phy_write(int reg, u16 value)
752 /* Fill the phyxcer register into REG_0C */
753 DM9000_iow(DM9000_EPAR, DM9000_PHY | reg);
755 /* Fill the written data into REG_0D & REG_0E */
756 DM9000_iow(DM9000_EPDRL, (value & 0xff));
757 DM9000_iow(DM9000_EPDRH, ((value >> 8) & 0xff));
758 DM9000_iow(DM9000_EPCR, 0xa); /* Issue phyxcer write command */
759 udelay(500); /* Wait write complete */
760 DM9000_iow(DM9000_EPCR, 0x0); /* Clear phyxcer write command */
761 DM9000_DBG("phy_write(reg:0x%x, value:0x%x)\n", reg, value);
763 #endif /* CONFIG_DRIVER_DM9000 */