2 * dm9000.c: Version 1.2 03/18/2003
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 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
41 * Cleanup of code to remove ifdefs
42 * Allowed platform device data to influence access width
43 * Reformatting areas of code
45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
46 * * removed 2.4 style module parameters
47 * * removed removed unused stat counter and fixed
49 * * introduced tx_timeout function
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
57 #include <linux/module.h>
58 #include <linux/ioport.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/init.h>
62 #include <linux/skbuff.h>
63 #include <linux/spinlock.h>
64 #include <linux/crc32.h>
65 #include <linux/mii.h>
66 #include <linux/dm9000.h>
67 #include <linux/delay.h>
68 #include <linux/platform_device.h>
70 #include <asm/delay.h>
76 /* Board/System/Debug information/definition ---------------- */
78 #define DM9000_PHY 0x40 /* PHY address 0x01 */
80 #define CARDNAME "dm9000"
81 #define PFX CARDNAME ": "
83 #define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
85 #define DM9000_DEBUG 0
88 #define PRINTK3(args...) printk(CARDNAME ": " args)
90 #define PRINTK3(args...) do { } while(0)
94 #define PRINTK2(args...) printk(CARDNAME ": " args)
96 #define PRINTK2(args...) do { } while(0)
100 #define PRINTK1(args...) printk(CARDNAME ": " args)
101 #define PRINTK(args...) printk(CARDNAME ": " args)
103 #define PRINTK1(args...) do { } while(0)
104 #define PRINTK(args...) printk(KERN_DEBUG args)
107 #ifdef CONFIG_BLACKFIN
111 #define writesb outsb
112 #define writesw outsw
113 #define writesl outsl
114 #define DM9000_IRQ_FLAGS (IRQF_SHARED | IRQF_TRIGGER_HIGH)
116 #define DM9000_IRQ_FLAGS IRQF_SHARED
120 * Transmit timeout, default 5 seconds.
122 static int watchdog = 5000;
123 module_param(watchdog, int, 0400);
124 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
126 /* Structure/enum declaration ------------------------------- */
127 typedef struct board_info {
129 void __iomem *io_addr; /* Register I/O base address */
130 void __iomem *io_data; /* Data I/O address */
135 u16 queue_start_addr;
137 u8 io_mode; /* 0:word, 2:byte */
140 void (*inblk)(void __iomem *port, void *data, int length);
141 void (*outblk)(void __iomem *port, void *data, int length);
142 void (*dumpblk)(void __iomem *port, int length);
144 struct resource *addr_res; /* resources found */
145 struct resource *data_res;
146 struct resource *addr_req; /* resources requested */
147 struct resource *data_req;
148 struct resource *irq_res;
150 struct timer_list timer;
151 unsigned char srom[128];
154 struct mii_if_info mii;
158 /* function declaration ------------------------------------- */
159 static int dm9000_probe(struct platform_device *);
160 static int dm9000_open(struct net_device *);
161 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
162 static int dm9000_stop(struct net_device *);
165 static void dm9000_timer(unsigned long);
166 static void dm9000_init_dm9000(struct net_device *);
168 static irqreturn_t dm9000_interrupt(int, void *);
170 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
171 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
173 static u16 read_srom_word(board_info_t *, int);
174 static void dm9000_rx(struct net_device *);
175 static void dm9000_hash_table(struct net_device *);
177 //#define DM9000_PROGRAM_EEPROM
178 #ifdef DM9000_PROGRAM_EEPROM
179 static void program_eeprom(board_info_t * db);
181 /* DM9000 network board routine ---------------------------- */
184 dm9000_reset(board_info_t * db)
186 PRINTK1("dm9000x: resetting\n");
188 writeb(DM9000_NCR, db->io_addr);
190 writeb(NCR_RST, db->io_data);
195 * Read a byte from I/O port
198 ior(board_info_t * db, int reg)
200 writeb(reg, db->io_addr);
201 return readb(db->io_data);
205 * Write a byte to I/O port
209 iow(board_info_t * db, int reg, int value)
211 writeb(reg, db->io_addr);
212 writeb(value, db->io_data);
215 /* routines for sending block to chip */
217 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
219 writesb(reg, data, count);
222 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
224 writesw(reg, data, (count+1) >> 1);
227 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
229 writesl(reg, data, (count+3) >> 2);
232 /* input block from chip to memory */
234 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
236 readsb(reg, data, count);
240 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
242 readsw(reg, data, (count+1) >> 1);
245 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
247 readsl(reg, data, (count+3) >> 2);
250 /* dump block from chip to null */
252 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
257 for (i = 0; i < count; i++)
261 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
266 count = (count + 1) >> 1;
268 for (i = 0; i < count; i++)
272 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
277 count = (count + 3) >> 2;
279 for (i = 0; i < count; i++)
285 * select the specified set of io routines to use with the
289 static void dm9000_set_io(struct board_info *db, int byte_width)
291 /* use the size of the data resource to work out what IO
292 * routines we want to use
295 switch (byte_width) {
297 db->dumpblk = dm9000_dumpblk_8bit;
298 db->outblk = dm9000_outblk_8bit;
299 db->inblk = dm9000_inblk_8bit;
303 db->dumpblk = dm9000_dumpblk_16bit;
304 db->outblk = dm9000_outblk_16bit;
305 db->inblk = dm9000_inblk_16bit;
309 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
310 db->dumpblk = dm9000_dumpblk_16bit;
311 db->outblk = dm9000_outblk_16bit;
312 db->inblk = dm9000_inblk_16bit;
317 db->dumpblk = dm9000_dumpblk_32bit;
318 db->outblk = dm9000_outblk_32bit;
319 db->inblk = dm9000_inblk_32bit;
325 /* Our watchdog timed out. Called by the networking layer */
326 static void dm9000_timeout(struct net_device *dev)
328 board_info_t *db = (board_info_t *) dev->priv;
332 /* Save previous register address */
333 reg_save = readb(db->io_addr);
334 spin_lock_irqsave(&db->lock,flags);
336 netif_stop_queue(dev);
338 dm9000_init_dm9000(dev);
339 /* We can accept TX packets again */
340 dev->trans_start = jiffies;
341 netif_wake_queue(dev);
343 /* Restore previous register address */
344 writeb(reg_save, db->io_addr);
345 spin_unlock_irqrestore(&db->lock,flags);
348 #ifdef CONFIG_NET_POLL_CONTROLLER
352 static void dm9000_poll_controller(struct net_device *dev)
354 disable_irq(dev->irq);
355 dm9000_interrupt(dev->irq,dev);
356 enable_irq(dev->irq);
360 /* dm9000_release_board
362 * release a board, and any mapped resources
366 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
368 if (db->data_res == NULL) {
369 if (db->addr_res != NULL)
370 release_mem_region((unsigned long)db->io_addr, 4);
374 /* unmap our resources */
376 iounmap(db->io_addr);
377 iounmap(db->io_data);
379 /* release the resources */
381 if (db->data_req != NULL) {
382 release_resource(db->data_req);
386 if (db->addr_req != NULL) {
387 release_resource(db->addr_req);
392 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
395 * Search DM9000 board, allocate space and register it
398 dm9000_probe(struct platform_device *pdev)
400 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
401 struct board_info *db; /* Point a board information structure */
402 struct net_device *ndev;
409 /* Init network device */
410 ndev = alloc_etherdev(sizeof (struct board_info));
412 printk("%s: could not allocate device.\n", CARDNAME);
416 SET_NETDEV_DEV(ndev, &pdev->dev);
418 PRINTK2("dm9000_probe()");
420 /* setup board info structure */
421 db = (struct board_info *) ndev->priv;
422 memset(db, 0, sizeof (*db));
424 spin_lock_init(&db->lock);
426 if (pdev->num_resources < 2) {
429 } else if (pdev->num_resources == 2) {
430 base = pdev->resource[0].start;
432 if (!request_mem_region(base, 4, ndev->name)) {
437 ndev->base_addr = base;
438 ndev->irq = pdev->resource[1].start;
439 db->io_addr = (void __iomem *)base;
440 db->io_data = (void __iomem *)(base + 4);
442 /* ensure at least we have a default set of IO routines */
443 dm9000_set_io(db, 2);
446 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
447 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
448 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
450 if (db->addr_res == NULL || db->data_res == NULL ||
451 db->irq_res == NULL) {
452 printk(KERN_ERR PFX "insufficient resources\n");
457 i = res_size(db->addr_res);
458 db->addr_req = request_mem_region(db->addr_res->start, i,
461 if (db->addr_req == NULL) {
462 printk(KERN_ERR PFX "cannot claim address reg area\n");
467 db->io_addr = ioremap(db->addr_res->start, i);
469 if (db->io_addr == NULL) {
470 printk(KERN_ERR "failed to ioremap address reg\n");
475 iosize = res_size(db->data_res);
476 db->data_req = request_mem_region(db->data_res->start, iosize,
479 if (db->data_req == NULL) {
480 printk(KERN_ERR PFX "cannot claim data reg area\n");
485 db->io_data = ioremap(db->data_res->start, iosize);
487 if (db->io_data == NULL) {
488 printk(KERN_ERR "failed to ioremap data reg\n");
493 /* fill in parameters for net-dev structure */
495 ndev->base_addr = (unsigned long)db->io_addr;
496 ndev->irq = db->irq_res->start;
498 /* ensure at least we have a default set of IO routines */
499 dm9000_set_io(db, iosize);
502 /* check to see if anything is being over-ridden */
504 /* check to see if the driver wants to over-ride the
505 * default IO width */
507 if (pdata->flags & DM9000_PLATF_8BITONLY)
508 dm9000_set_io(db, 1);
510 if (pdata->flags & DM9000_PLATF_16BITONLY)
511 dm9000_set_io(db, 2);
513 if (pdata->flags & DM9000_PLATF_32BITONLY)
514 dm9000_set_io(db, 4);
516 /* check to see if there are any IO routine
519 if (pdata->inblk != NULL)
520 db->inblk = pdata->inblk;
522 if (pdata->outblk != NULL)
523 db->outblk = pdata->outblk;
525 if (pdata->dumpblk != NULL)
526 db->dumpblk = pdata->dumpblk;
531 /* try two times, DM9000 sometimes gets the first read wrong */
532 for (i = 0; i < 2; i++) {
533 id_val = ior(db, DM9000_VIDL);
534 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
535 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
536 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
538 if (id_val == DM9000_ID)
540 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
543 if (id_val != DM9000_ID) {
544 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
548 /* from this point we assume that we have found a DM9000 */
550 /* driver system function */
553 ndev->open = &dm9000_open;
554 ndev->hard_start_xmit = &dm9000_start_xmit;
555 ndev->tx_timeout = &dm9000_timeout;
556 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
557 ndev->stop = &dm9000_stop;
558 ndev->set_multicast_list = &dm9000_hash_table;
559 #ifdef CONFIG_NET_POLL_CONTROLLER
560 ndev->poll_controller = &dm9000_poll_controller;
563 #ifdef DM9000_PROGRAM_EEPROM
566 db->msg_enable = NETIF_MSG_LINK;
567 db->mii.phy_id_mask = 0x1f;
568 db->mii.reg_num_mask = 0x1f;
569 db->mii.force_media = 0;
570 db->mii.full_duplex = 0;
572 db->mii.mdio_read = dm9000_phy_read;
573 db->mii.mdio_write = dm9000_phy_write;
575 /* Read SROM content */
576 for (i = 0; i < 64; i++)
577 ((u16 *) db->srom)[i] = read_srom_word(db, i);
579 /* Set Node Address */
580 for (i = 0; i < 6; i++)
581 ndev->dev_addr[i] = db->srom[i];
583 if (!is_valid_ether_addr(ndev->dev_addr)) {
584 /* try reading from mac */
586 for (i = 0; i < 6; i++)
587 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
590 if (!is_valid_ether_addr(ndev->dev_addr))
591 printk("%s: Invalid ethernet MAC address. Please "
592 "set using ifconfig\n", ndev->name);
594 platform_set_drvdata(pdev, ndev);
595 ret = register_netdev(ndev);
598 DECLARE_MAC_BUF(mac);
599 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
600 ndev->name, db->io_addr, db->io_data, ndev->irq,
601 print_mac(mac, ndev->dev_addr));
607 printk("%s: not found (%d).\n", CARDNAME, ret);
609 dm9000_release_board(pdev, db);
616 * Open the interface.
617 * The interface is opened whenever "ifconfig" actives it.
620 dm9000_open(struct net_device *dev)
622 board_info_t *db = (board_info_t *) dev->priv;
624 PRINTK2("entering dm9000_open\n");
626 if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
629 /* Initialize DM9000 board */
631 dm9000_init_dm9000(dev);
633 /* Init driver variable */
636 /* set and active a timer process */
637 init_timer(&db->timer);
638 db->timer.expires = DM9000_TIMER_WUT;
639 db->timer.data = (unsigned long) dev;
640 db->timer.function = &dm9000_timer;
641 add_timer(&db->timer);
643 mii_check_media(&db->mii, netif_msg_link(db), 1);
644 netif_start_queue(dev);
650 * Initilize dm9000 board
653 dm9000_init_dm9000(struct net_device *dev)
655 board_info_t *db = (board_info_t *) dev->priv;
657 PRINTK1("entering %s\n",__FUNCTION__);
660 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
662 /* GPIO0 on pre-activate PHY */
663 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
664 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
665 iow(db, DM9000_GPR, 0); /* Enable PHY */
667 /* Program operating register */
668 iow(db, DM9000_TCR, 0); /* TX Polling clear */
669 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
670 iow(db, DM9000_FCR, 0xff); /* Flow Control */
671 iow(db, DM9000_SMCR, 0); /* Special Mode */
672 /* clear TX status */
673 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
674 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
676 /* Set address filter table */
677 dm9000_hash_table(dev);
679 /* Activate DM9000 */
680 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
681 /* Enable TX/RX interrupt mask */
682 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
684 /* Init Driver variable */
686 db->queue_pkt_len = 0;
687 dev->trans_start = 0;
691 * Hardware start transmission.
692 * Send a packet to media from the upper layer.
695 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
698 board_info_t *db = (board_info_t *) dev->priv;
700 PRINTK3("dm9000_start_xmit\n");
702 if (db->tx_pkt_cnt > 1)
705 spin_lock_irqsave(&db->lock, flags);
707 /* Move data to DM9000 TX RAM */
708 writeb(DM9000_MWCMD, db->io_addr);
710 (db->outblk)(db->io_data, skb->data, skb->len);
711 dev->stats.tx_bytes += skb->len;
714 /* TX control: First packet immediately send, second packet queue */
715 if (db->tx_pkt_cnt == 1) {
716 /* Set TX length to DM9000 */
717 iow(db, DM9000_TXPLL, skb->len & 0xff);
718 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
720 /* Issue TX polling command */
721 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
723 dev->trans_start = jiffies; /* save the time stamp */
726 db->queue_pkt_len = skb->len;
727 netif_stop_queue(dev);
730 spin_unlock_irqrestore(&db->lock, flags);
739 dm9000_shutdown(struct net_device *dev)
741 board_info_t *db = (board_info_t *) dev->priv;
744 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
745 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
746 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
747 iow(db, DM9000_RCR, 0x00); /* Disable RX */
751 * Stop the interface.
752 * The interface is stopped when it is brought.
755 dm9000_stop(struct net_device *ndev)
757 board_info_t *db = (board_info_t *) ndev->priv;
759 PRINTK1("entering %s\n",__FUNCTION__);
762 del_timer(&db->timer);
764 netif_stop_queue(ndev);
765 netif_carrier_off(ndev);
768 free_irq(ndev->irq, ndev);
770 dm9000_shutdown(ndev);
776 * DM9000 interrupt handler
777 * receive the packet to upper layer, free the transmitted packet
781 dm9000_tx_done(struct net_device *dev, board_info_t * db)
783 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
785 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
786 /* One packet sent complete */
788 dev->stats.tx_packets++;
790 /* Queue packet check & send */
791 if (db->tx_pkt_cnt > 0) {
792 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
793 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
794 iow(db, DM9000_TCR, TCR_TXREQ);
795 dev->trans_start = jiffies;
797 netif_wake_queue(dev);
802 dm9000_interrupt(int irq, void *dev_id)
804 struct net_device *dev = dev_id;
809 PRINTK3("entering %s\n",__FUNCTION__);
812 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
816 /* A real interrupt coming */
817 db = (board_info_t *) dev->priv;
818 spin_lock(&db->lock);
820 /* Save previous register address */
821 reg_save = readb(db->io_addr);
823 /* Disable all interrupts */
824 iow(db, DM9000_IMR, IMR_PAR);
826 /* Got DM9000 interrupt status */
827 int_status = ior(db, DM9000_ISR); /* Got ISR */
828 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
830 /* Received the coming packet */
831 if (int_status & ISR_PRS)
834 /* Trnasmit Interrupt check */
835 if (int_status & ISR_PTS)
836 dm9000_tx_done(dev, db);
838 /* Re-enable interrupt mask */
839 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
841 /* Restore previous register address */
842 writeb(reg_save, db->io_addr);
844 spin_unlock(&db->lock);
850 * A periodic timer routine
851 * Dynamic media sense, allocated Rx buffer...
854 dm9000_timer(unsigned long data)
856 struct net_device *dev = (struct net_device *) data;
857 board_info_t *db = (board_info_t *) dev->priv;
859 PRINTK3("dm9000_timer()\n");
861 mii_check_media(&db->mii, netif_msg_link(db), 0);
863 /* Set timer again */
864 db->timer.expires = DM9000_TIMER_WUT;
865 add_timer(&db->timer);
868 struct dm9000_rxhdr {
871 } __attribute__((__packed__));
874 * Received a packet and pass to upper layer
877 dm9000_rx(struct net_device *dev)
879 board_info_t *db = (board_info_t *) dev->priv;
880 struct dm9000_rxhdr rxhdr;
886 /* Check packet ready or not */
888 ior(db, DM9000_MRCMDX); /* Dummy read */
890 /* Get most updated data */
891 rxbyte = readb(db->io_data);
893 /* Status check: this byte must be 0 or 1 */
894 if (rxbyte > DM9000_PKT_RDY) {
895 printk("status check failed: %d\n", rxbyte);
896 iow(db, DM9000_RCR, 0x00); /* Stop Device */
897 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
901 if (rxbyte != DM9000_PKT_RDY)
904 /* A packet ready now & Get status/length */
906 writeb(DM9000_MRCMD, db->io_addr);
908 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
912 /* Packet Status check */
915 PRINTK1("Bad Packet received (runt)\n");
918 if (RxLen > DM9000_PKT_MAX) {
919 PRINTK1("RST: RX Len:%x\n", RxLen);
922 if (rxhdr.RxStatus & 0xbf00) {
924 if (rxhdr.RxStatus & 0x100) {
925 PRINTK1("fifo error\n");
926 dev->stats.rx_fifo_errors++;
928 if (rxhdr.RxStatus & 0x200) {
929 PRINTK1("crc error\n");
930 dev->stats.rx_crc_errors++;
932 if (rxhdr.RxStatus & 0x8000) {
933 PRINTK1("length error\n");
934 dev->stats.rx_length_errors++;
938 /* Move data from DM9000 */
940 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
942 rdptr = (u8 *) skb_put(skb, RxLen - 4);
944 /* Read received packet from RX SRAM */
946 (db->inblk)(db->io_data, rdptr, RxLen);
947 dev->stats.rx_bytes += RxLen;
949 /* Pass to upper layer */
950 skb->protocol = eth_type_trans(skb, dev);
952 dev->stats.rx_packets++;
955 /* need to dump the packet's data */
957 (db->dumpblk)(db->io_data, RxLen);
959 } while (rxbyte == DM9000_PKT_RDY);
963 * Read a word data from SROM
966 read_srom_word(board_info_t * db, int offset)
968 iow(db, DM9000_EPAR, offset);
969 iow(db, DM9000_EPCR, EPCR_ERPRR);
970 mdelay(8); /* according to the datasheet 200us should be enough,
971 but it doesn't work */
972 iow(db, DM9000_EPCR, 0x0);
973 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
976 #ifdef DM9000_PROGRAM_EEPROM
978 * Write a word data to SROM
981 write_srom_word(board_info_t * db, int offset, u16 val)
983 iow(db, DM9000_EPAR, offset);
984 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
985 iow(db, DM9000_EPDRL, (val & 0xff));
986 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
987 mdelay(8); /* same shit */
988 iow(db, DM9000_EPCR, 0);
992 * Only for development:
993 * Here we write static data to the eeprom in case
994 * we don't have valid content on a new board
997 program_eeprom(board_info_t * db)
999 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1000 0x0000, /* Autoload: accept nothing */
1001 0x0a46, 0x9000, /* Vendor / Product ID */
1002 0x0000, /* pin control */
1004 }; /* Wake-up mode control */
1006 for (i = 0; i < 8; i++)
1007 write_srom_word(db, i, eeprom[i]);
1013 * Calculate the CRC valude of the Rx packet
1014 * flag = 1 : return the reverse CRC (for the received packet CRC)
1015 * 0 : return the normal CRC (for Hash Table index)
1018 static unsigned long
1019 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1022 u32 crc = ether_crc_le(Len, Data);
1031 * Set DM9000 multicast address
1034 dm9000_hash_table(struct net_device *dev)
1036 board_info_t *db = (board_info_t *) dev->priv;
1037 struct dev_mc_list *mcptr = dev->mc_list;
1038 int mc_cnt = dev->mc_count;
1040 u16 i, oft, hash_table[4];
1041 unsigned long flags;
1043 PRINTK2("dm9000_hash_table()\n");
1045 spin_lock_irqsave(&db->lock,flags);
1047 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1048 iow(db, oft, dev->dev_addr[i]);
1050 /* Clear Hash Table */
1051 for (i = 0; i < 4; i++)
1052 hash_table[i] = 0x0;
1054 /* broadcast address */
1055 hash_table[3] = 0x8000;
1057 /* the multicast address in Hash Table : 64 bits */
1058 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1059 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1060 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1063 /* Write the hash table to MAC MD table */
1064 for (i = 0, oft = 0x16; i < 4; i++) {
1065 iow(db, oft++, hash_table[i] & 0xff);
1066 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1069 spin_unlock_irqrestore(&db->lock,flags);
1074 * Read a word from phyxcer
1077 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1079 board_info_t *db = (board_info_t *) dev->priv;
1080 unsigned long flags;
1081 unsigned int reg_save;
1084 spin_lock_irqsave(&db->lock,flags);
1086 /* Save previous register address */
1087 reg_save = readb(db->io_addr);
1089 /* Fill the phyxcer register into REG_0C */
1090 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1092 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1093 udelay(100); /* Wait read complete */
1094 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1096 /* The read data keeps on REG_0D & REG_0E */
1097 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1099 /* restore the previous address */
1100 writeb(reg_save, db->io_addr);
1102 spin_unlock_irqrestore(&db->lock,flags);
1108 * Write a word to phyxcer
1111 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1113 board_info_t *db = (board_info_t *) dev->priv;
1114 unsigned long flags;
1115 unsigned long reg_save;
1117 spin_lock_irqsave(&db->lock,flags);
1119 /* Save previous register address */
1120 reg_save = readb(db->io_addr);
1122 /* Fill the phyxcer register into REG_0C */
1123 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1125 /* Fill the written data into REG_0D & REG_0E */
1126 iow(db, DM9000_EPDRL, (value & 0xff));
1127 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1129 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1130 udelay(500); /* Wait write complete */
1131 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1133 /* restore the previous address */
1134 writeb(reg_save, db->io_addr);
1136 spin_unlock_irqrestore(&db->lock,flags);
1140 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1142 struct net_device *ndev = platform_get_drvdata(dev);
1145 if (netif_running(ndev)) {
1146 netif_device_detach(ndev);
1147 dm9000_shutdown(ndev);
1154 dm9000_drv_resume(struct platform_device *dev)
1156 struct net_device *ndev = platform_get_drvdata(dev);
1157 board_info_t *db = (board_info_t *) ndev->priv;
1161 if (netif_running(ndev)) {
1163 dm9000_init_dm9000(ndev);
1165 netif_device_attach(ndev);
1172 dm9000_drv_remove(struct platform_device *pdev)
1174 struct net_device *ndev = platform_get_drvdata(pdev);
1176 platform_set_drvdata(pdev, NULL);
1178 unregister_netdev(ndev);
1179 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1180 free_netdev(ndev); /* free device structure */
1182 PRINTK1("clean_module() exit\n");
1187 static struct platform_driver dm9000_driver = {
1190 .owner = THIS_MODULE,
1192 .probe = dm9000_probe,
1193 .remove = dm9000_drv_remove,
1194 .suspend = dm9000_drv_suspend,
1195 .resume = dm9000_drv_resume,
1201 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1203 return platform_driver_register(&dm9000_driver); /* search board and register */
1207 dm9000_cleanup(void)
1209 platform_driver_unregister(&dm9000_driver);
1212 module_init(dm9000_init);
1213 module_exit(dm9000_cleanup);
1215 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1216 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1217 MODULE_LICENSE("GPL");