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 struct net_device_stats stats;
152 unsigned char srom[128];
155 struct mii_if_info mii;
159 /* function declaration ------------------------------------- */
160 static int dm9000_probe(struct platform_device *);
161 static int dm9000_open(struct net_device *);
162 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
163 static int dm9000_stop(struct net_device *);
166 static void dm9000_timer(unsigned long);
167 static void dm9000_init_dm9000(struct net_device *);
169 static struct net_device_stats *dm9000_get_stats(struct net_device *);
171 static irqreturn_t dm9000_interrupt(int, void *);
173 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
174 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
176 static u16 read_srom_word(board_info_t *, int);
177 static void dm9000_rx(struct net_device *);
178 static void dm9000_hash_table(struct net_device *);
180 //#define DM9000_PROGRAM_EEPROM
181 #ifdef DM9000_PROGRAM_EEPROM
182 static void program_eeprom(board_info_t * db);
184 /* DM9000 network board routine ---------------------------- */
187 dm9000_reset(board_info_t * db)
189 PRINTK1("dm9000x: resetting\n");
191 writeb(DM9000_NCR, db->io_addr);
193 writeb(NCR_RST, db->io_data);
198 * Read a byte from I/O port
201 ior(board_info_t * db, int reg)
203 writeb(reg, db->io_addr);
204 return readb(db->io_data);
208 * Write a byte to I/O port
212 iow(board_info_t * db, int reg, int value)
214 writeb(reg, db->io_addr);
215 writeb(value, db->io_data);
218 /* routines for sending block to chip */
220 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
222 writesb(reg, data, count);
225 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
227 writesw(reg, data, (count+1) >> 1);
230 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
232 writesl(reg, data, (count+3) >> 2);
235 /* input block from chip to memory */
237 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
239 readsb(reg, data, count);
243 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
245 readsw(reg, data, (count+1) >> 1);
248 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
250 readsl(reg, data, (count+3) >> 2);
253 /* dump block from chip to null */
255 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
260 for (i = 0; i < count; i++)
264 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
269 count = (count + 1) >> 1;
271 for (i = 0; i < count; i++)
275 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
280 count = (count + 3) >> 2;
282 for (i = 0; i < count; i++)
288 * select the specified set of io routines to use with the
292 static void dm9000_set_io(struct board_info *db, int byte_width)
294 /* use the size of the data resource to work out what IO
295 * routines we want to use
298 switch (byte_width) {
300 db->dumpblk = dm9000_dumpblk_8bit;
301 db->outblk = dm9000_outblk_8bit;
302 db->inblk = dm9000_inblk_8bit;
306 db->dumpblk = dm9000_dumpblk_16bit;
307 db->outblk = dm9000_outblk_16bit;
308 db->inblk = dm9000_inblk_16bit;
312 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
313 db->dumpblk = dm9000_dumpblk_16bit;
314 db->outblk = dm9000_outblk_16bit;
315 db->inblk = dm9000_inblk_16bit;
320 db->dumpblk = dm9000_dumpblk_32bit;
321 db->outblk = dm9000_outblk_32bit;
322 db->inblk = dm9000_inblk_32bit;
328 /* Our watchdog timed out. Called by the networking layer */
329 static void dm9000_timeout(struct net_device *dev)
331 board_info_t *db = (board_info_t *) dev->priv;
335 /* Save previous register address */
336 reg_save = readb(db->io_addr);
337 spin_lock_irqsave(&db->lock,flags);
339 netif_stop_queue(dev);
341 dm9000_init_dm9000(dev);
342 /* We can accept TX packets again */
343 dev->trans_start = jiffies;
344 netif_wake_queue(dev);
346 /* Restore previous register address */
347 writeb(reg_save, db->io_addr);
348 spin_unlock_irqrestore(&db->lock,flags);
351 #ifdef CONFIG_NET_POLL_CONTROLLER
355 static void dm9000_poll_controller(struct net_device *dev)
357 disable_irq(dev->irq);
358 dm9000_interrupt(dev->irq,dev);
359 enable_irq(dev->irq);
363 /* dm9000_release_board
365 * release a board, and any mapped resources
369 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
371 if (db->data_res == NULL) {
372 if (db->addr_res != NULL)
373 release_mem_region((unsigned long)db->io_addr, 4);
377 /* unmap our resources */
379 iounmap(db->io_addr);
380 iounmap(db->io_data);
382 /* release the resources */
384 if (db->data_req != NULL) {
385 release_resource(db->data_req);
389 if (db->addr_req != NULL) {
390 release_resource(db->addr_req);
395 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
398 * Search DM9000 board, allocate space and register it
401 dm9000_probe(struct platform_device *pdev)
403 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
404 struct board_info *db; /* Point a board information structure */
405 struct net_device *ndev;
412 /* Init network device */
413 ndev = alloc_etherdev(sizeof (struct board_info));
415 printk("%s: could not allocate device.\n", CARDNAME);
419 SET_NETDEV_DEV(ndev, &pdev->dev);
421 PRINTK2("dm9000_probe()");
423 /* setup board info structure */
424 db = (struct board_info *) ndev->priv;
425 memset(db, 0, sizeof (*db));
427 spin_lock_init(&db->lock);
429 if (pdev->num_resources < 2) {
432 } else if (pdev->num_resources == 2) {
433 base = pdev->resource[0].start;
435 if (!request_mem_region(base, 4, ndev->name)) {
440 ndev->base_addr = base;
441 ndev->irq = pdev->resource[1].start;
442 db->io_addr = (void __iomem *)base;
443 db->io_data = (void __iomem *)(base + 4);
445 /* ensure at least we have a default set of IO routines */
446 dm9000_set_io(db, 2);
449 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
450 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
451 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
453 if (db->addr_res == NULL || db->data_res == NULL ||
454 db->irq_res == NULL) {
455 printk(KERN_ERR PFX "insufficient resources\n");
460 i = res_size(db->addr_res);
461 db->addr_req = request_mem_region(db->addr_res->start, i,
464 if (db->addr_req == NULL) {
465 printk(KERN_ERR PFX "cannot claim address reg area\n");
470 db->io_addr = ioremap(db->addr_res->start, i);
472 if (db->io_addr == NULL) {
473 printk(KERN_ERR "failed to ioremap address reg\n");
478 iosize = res_size(db->data_res);
479 db->data_req = request_mem_region(db->data_res->start, iosize,
482 if (db->data_req == NULL) {
483 printk(KERN_ERR PFX "cannot claim data reg area\n");
488 db->io_data = ioremap(db->data_res->start, iosize);
490 if (db->io_data == NULL) {
491 printk(KERN_ERR "failed to ioremap data reg\n");
496 /* fill in parameters for net-dev structure */
498 ndev->base_addr = (unsigned long)db->io_addr;
499 ndev->irq = db->irq_res->start;
501 /* ensure at least we have a default set of IO routines */
502 dm9000_set_io(db, iosize);
505 /* check to see if anything is being over-ridden */
507 /* check to see if the driver wants to over-ride the
508 * default IO width */
510 if (pdata->flags & DM9000_PLATF_8BITONLY)
511 dm9000_set_io(db, 1);
513 if (pdata->flags & DM9000_PLATF_16BITONLY)
514 dm9000_set_io(db, 2);
516 if (pdata->flags & DM9000_PLATF_32BITONLY)
517 dm9000_set_io(db, 4);
519 /* check to see if there are any IO routine
522 if (pdata->inblk != NULL)
523 db->inblk = pdata->inblk;
525 if (pdata->outblk != NULL)
526 db->outblk = pdata->outblk;
528 if (pdata->dumpblk != NULL)
529 db->dumpblk = pdata->dumpblk;
534 /* try two times, DM9000 sometimes gets the first read wrong */
535 for (i = 0; i < 2; i++) {
536 id_val = ior(db, DM9000_VIDL);
537 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
538 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
539 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
541 if (id_val == DM9000_ID)
543 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
546 if (id_val != DM9000_ID) {
547 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
551 /* from this point we assume that we have found a DM9000 */
553 /* driver system function */
556 ndev->open = &dm9000_open;
557 ndev->hard_start_xmit = &dm9000_start_xmit;
558 ndev->tx_timeout = &dm9000_timeout;
559 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
560 ndev->stop = &dm9000_stop;
561 ndev->get_stats = &dm9000_get_stats;
562 ndev->set_multicast_list = &dm9000_hash_table;
563 #ifdef CONFIG_NET_POLL_CONTROLLER
564 ndev->poll_controller = &dm9000_poll_controller;
567 #ifdef DM9000_PROGRAM_EEPROM
570 db->msg_enable = NETIF_MSG_LINK;
571 db->mii.phy_id_mask = 0x1f;
572 db->mii.reg_num_mask = 0x1f;
573 db->mii.force_media = 0;
574 db->mii.full_duplex = 0;
576 db->mii.mdio_read = dm9000_phy_read;
577 db->mii.mdio_write = dm9000_phy_write;
579 /* Read SROM content */
580 for (i = 0; i < 64; i++)
581 ((u16 *) db->srom)[i] = read_srom_word(db, i);
583 /* Set Node Address */
584 for (i = 0; i < 6; i++)
585 ndev->dev_addr[i] = db->srom[i];
587 if (!is_valid_ether_addr(ndev->dev_addr)) {
588 /* try reading from mac */
590 for (i = 0; i < 6; i++)
591 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
594 if (!is_valid_ether_addr(ndev->dev_addr))
595 printk("%s: Invalid ethernet MAC address. Please "
596 "set using ifconfig\n", ndev->name);
598 platform_set_drvdata(pdev, ndev);
599 ret = register_netdev(ndev);
602 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
603 ndev->name, db->io_addr, db->io_data, ndev->irq);
604 for (i = 0; i < 5; i++)
605 printk("%02x:", ndev->dev_addr[i]);
606 printk("%02x\n", ndev->dev_addr[5]);
612 printk("%s: not found (%d).\n", CARDNAME, ret);
614 dm9000_release_board(pdev, db);
621 * Open the interface.
622 * The interface is opened whenever "ifconfig" actives it.
625 dm9000_open(struct net_device *dev)
627 board_info_t *db = (board_info_t *) dev->priv;
629 PRINTK2("entering dm9000_open\n");
631 if (request_irq(dev->irq, &dm9000_interrupt, DM9000_IRQ_FLAGS, dev->name, dev))
634 /* Initialize DM9000 board */
636 dm9000_init_dm9000(dev);
638 /* Init driver variable */
641 /* set and active a timer process */
642 init_timer(&db->timer);
643 db->timer.expires = DM9000_TIMER_WUT;
644 db->timer.data = (unsigned long) dev;
645 db->timer.function = &dm9000_timer;
646 add_timer(&db->timer);
648 mii_check_media(&db->mii, netif_msg_link(db), 1);
649 netif_start_queue(dev);
655 * Initilize dm9000 board
658 dm9000_init_dm9000(struct net_device *dev)
660 board_info_t *db = (board_info_t *) dev->priv;
662 PRINTK1("entering %s\n",__FUNCTION__);
665 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
667 /* GPIO0 on pre-activate PHY */
668 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
669 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
670 iow(db, DM9000_GPR, 0); /* Enable PHY */
672 /* Program operating register */
673 iow(db, DM9000_TCR, 0); /* TX Polling clear */
674 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
675 iow(db, DM9000_FCR, 0xff); /* Flow Control */
676 iow(db, DM9000_SMCR, 0); /* Special Mode */
677 /* clear TX status */
678 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
679 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
681 /* Set address filter table */
682 dm9000_hash_table(dev);
684 /* Activate DM9000 */
685 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
686 /* Enable TX/RX interrupt mask */
687 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
689 /* Init Driver variable */
691 db->queue_pkt_len = 0;
692 dev->trans_start = 0;
696 * Hardware start transmission.
697 * Send a packet to media from the upper layer.
700 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
703 board_info_t *db = (board_info_t *) dev->priv;
705 PRINTK3("dm9000_start_xmit\n");
707 if (db->tx_pkt_cnt > 1)
710 spin_lock_irqsave(&db->lock, flags);
712 /* Move data to DM9000 TX RAM */
713 writeb(DM9000_MWCMD, db->io_addr);
715 (db->outblk)(db->io_data, skb->data, skb->len);
716 db->stats.tx_bytes += skb->len;
719 /* TX control: First packet immediately send, second packet queue */
720 if (db->tx_pkt_cnt == 1) {
721 /* Set TX length to DM9000 */
722 iow(db, DM9000_TXPLL, skb->len & 0xff);
723 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
725 /* Issue TX polling command */
726 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
728 dev->trans_start = jiffies; /* save the time stamp */
731 db->queue_pkt_len = skb->len;
732 netif_stop_queue(dev);
735 spin_unlock_irqrestore(&db->lock, flags);
744 dm9000_shutdown(struct net_device *dev)
746 board_info_t *db = (board_info_t *) dev->priv;
749 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
750 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
751 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
752 iow(db, DM9000_RCR, 0x00); /* Disable RX */
756 * Stop the interface.
757 * The interface is stopped when it is brought.
760 dm9000_stop(struct net_device *ndev)
762 board_info_t *db = (board_info_t *) ndev->priv;
764 PRINTK1("entering %s\n",__FUNCTION__);
767 del_timer(&db->timer);
769 netif_stop_queue(ndev);
770 netif_carrier_off(ndev);
773 free_irq(ndev->irq, ndev);
775 dm9000_shutdown(ndev);
781 * DM9000 interrupt handler
782 * receive the packet to upper layer, free the transmitted packet
786 dm9000_tx_done(struct net_device *dev, board_info_t * db)
788 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
790 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
791 /* One packet sent complete */
793 db->stats.tx_packets++;
795 /* Queue packet check & send */
796 if (db->tx_pkt_cnt > 0) {
797 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
798 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
799 iow(db, DM9000_TCR, TCR_TXREQ);
800 dev->trans_start = jiffies;
802 netif_wake_queue(dev);
807 dm9000_interrupt(int irq, void *dev_id)
809 struct net_device *dev = dev_id;
814 PRINTK3("entering %s\n",__FUNCTION__);
817 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
821 /* A real interrupt coming */
822 db = (board_info_t *) dev->priv;
823 spin_lock(&db->lock);
825 /* Save previous register address */
826 reg_save = readb(db->io_addr);
828 /* Disable all interrupts */
829 iow(db, DM9000_IMR, IMR_PAR);
831 /* Got DM9000 interrupt status */
832 int_status = ior(db, DM9000_ISR); /* Got ISR */
833 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
835 /* Received the coming packet */
836 if (int_status & ISR_PRS)
839 /* Trnasmit Interrupt check */
840 if (int_status & ISR_PTS)
841 dm9000_tx_done(dev, db);
843 /* Re-enable interrupt mask */
844 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
846 /* Restore previous register address */
847 writeb(reg_save, db->io_addr);
849 spin_unlock(&db->lock);
855 * Get statistics from driver.
857 static struct net_device_stats *
858 dm9000_get_stats(struct net_device *dev)
860 board_info_t *db = (board_info_t *) dev->priv;
866 * A periodic timer routine
867 * Dynamic media sense, allocated Rx buffer...
870 dm9000_timer(unsigned long data)
872 struct net_device *dev = (struct net_device *) data;
873 board_info_t *db = (board_info_t *) dev->priv;
875 PRINTK3("dm9000_timer()\n");
877 mii_check_media(&db->mii, netif_msg_link(db), 0);
879 /* Set timer again */
880 db->timer.expires = DM9000_TIMER_WUT;
881 add_timer(&db->timer);
884 struct dm9000_rxhdr {
887 } __attribute__((__packed__));
890 * Received a packet and pass to upper layer
893 dm9000_rx(struct net_device *dev)
895 board_info_t *db = (board_info_t *) dev->priv;
896 struct dm9000_rxhdr rxhdr;
902 /* Check packet ready or not */
904 ior(db, DM9000_MRCMDX); /* Dummy read */
906 /* Get most updated data */
907 rxbyte = readb(db->io_data);
909 /* Status check: this byte must be 0 or 1 */
910 if (rxbyte > DM9000_PKT_RDY) {
911 printk("status check failed: %d\n", rxbyte);
912 iow(db, DM9000_RCR, 0x00); /* Stop Device */
913 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
917 if (rxbyte != DM9000_PKT_RDY)
920 /* A packet ready now & Get status/length */
922 writeb(DM9000_MRCMD, db->io_addr);
924 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
928 /* Packet Status check */
931 PRINTK1("Bad Packet received (runt)\n");
934 if (RxLen > DM9000_PKT_MAX) {
935 PRINTK1("RST: RX Len:%x\n", RxLen);
938 if (rxhdr.RxStatus & 0xbf00) {
940 if (rxhdr.RxStatus & 0x100) {
941 PRINTK1("fifo error\n");
942 db->stats.rx_fifo_errors++;
944 if (rxhdr.RxStatus & 0x200) {
945 PRINTK1("crc error\n");
946 db->stats.rx_crc_errors++;
948 if (rxhdr.RxStatus & 0x8000) {
949 PRINTK1("length error\n");
950 db->stats.rx_length_errors++;
954 /* Move data from DM9000 */
956 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
958 rdptr = (u8 *) skb_put(skb, RxLen - 4);
960 /* Read received packet from RX SRAM */
962 (db->inblk)(db->io_data, rdptr, RxLen);
963 db->stats.rx_bytes += RxLen;
965 /* Pass to upper layer */
966 skb->protocol = eth_type_trans(skb, dev);
968 db->stats.rx_packets++;
971 /* need to dump the packet's data */
973 (db->dumpblk)(db->io_data, RxLen);
975 } while (rxbyte == DM9000_PKT_RDY);
979 * Read a word data from SROM
982 read_srom_word(board_info_t * db, int offset)
984 iow(db, DM9000_EPAR, offset);
985 iow(db, DM9000_EPCR, EPCR_ERPRR);
986 mdelay(8); /* according to the datasheet 200us should be enough,
987 but it doesn't work */
988 iow(db, DM9000_EPCR, 0x0);
989 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
992 #ifdef DM9000_PROGRAM_EEPROM
994 * Write a word data to SROM
997 write_srom_word(board_info_t * db, int offset, u16 val)
999 iow(db, DM9000_EPAR, offset);
1000 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1001 iow(db, DM9000_EPDRL, (val & 0xff));
1002 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1003 mdelay(8); /* same shit */
1004 iow(db, DM9000_EPCR, 0);
1008 * Only for development:
1009 * Here we write static data to the eeprom in case
1010 * we don't have valid content on a new board
1013 program_eeprom(board_info_t * db)
1015 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1016 0x0000, /* Autoload: accept nothing */
1017 0x0a46, 0x9000, /* Vendor / Product ID */
1018 0x0000, /* pin control */
1020 }; /* Wake-up mode control */
1022 for (i = 0; i < 8; i++)
1023 write_srom_word(db, i, eeprom[i]);
1029 * Calculate the CRC valude of the Rx packet
1030 * flag = 1 : return the reverse CRC (for the received packet CRC)
1031 * 0 : return the normal CRC (for Hash Table index)
1034 static unsigned long
1035 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1038 u32 crc = ether_crc_le(Len, Data);
1047 * Set DM9000 multicast address
1050 dm9000_hash_table(struct net_device *dev)
1052 board_info_t *db = (board_info_t *) dev->priv;
1053 struct dev_mc_list *mcptr = dev->mc_list;
1054 int mc_cnt = dev->mc_count;
1056 u16 i, oft, hash_table[4];
1057 unsigned long flags;
1059 PRINTK2("dm9000_hash_table()\n");
1061 spin_lock_irqsave(&db->lock,flags);
1063 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1064 iow(db, oft, dev->dev_addr[i]);
1066 /* Clear Hash Table */
1067 for (i = 0; i < 4; i++)
1068 hash_table[i] = 0x0;
1070 /* broadcast address */
1071 hash_table[3] = 0x8000;
1073 /* the multicast address in Hash Table : 64 bits */
1074 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1075 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1076 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1079 /* Write the hash table to MAC MD table */
1080 for (i = 0, oft = 0x16; i < 4; i++) {
1081 iow(db, oft++, hash_table[i] & 0xff);
1082 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1085 spin_unlock_irqrestore(&db->lock,flags);
1090 * Read a word from phyxcer
1093 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1095 board_info_t *db = (board_info_t *) dev->priv;
1096 unsigned long flags;
1097 unsigned int reg_save;
1100 spin_lock_irqsave(&db->lock,flags);
1102 /* Save previous register address */
1103 reg_save = readb(db->io_addr);
1105 /* Fill the phyxcer register into REG_0C */
1106 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1108 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1109 udelay(100); /* Wait read complete */
1110 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1112 /* The read data keeps on REG_0D & REG_0E */
1113 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1115 /* restore the previous address */
1116 writeb(reg_save, db->io_addr);
1118 spin_unlock_irqrestore(&db->lock,flags);
1124 * Write a word to phyxcer
1127 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1129 board_info_t *db = (board_info_t *) dev->priv;
1130 unsigned long flags;
1131 unsigned long reg_save;
1133 spin_lock_irqsave(&db->lock,flags);
1135 /* Save previous register address */
1136 reg_save = readb(db->io_addr);
1138 /* Fill the phyxcer register into REG_0C */
1139 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1141 /* Fill the written data into REG_0D & REG_0E */
1142 iow(db, DM9000_EPDRL, (value & 0xff));
1143 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1145 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1146 udelay(500); /* Wait write complete */
1147 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1149 /* restore the previous address */
1150 writeb(reg_save, db->io_addr);
1152 spin_unlock_irqrestore(&db->lock,flags);
1156 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1158 struct net_device *ndev = platform_get_drvdata(dev);
1161 if (netif_running(ndev)) {
1162 netif_device_detach(ndev);
1163 dm9000_shutdown(ndev);
1170 dm9000_drv_resume(struct platform_device *dev)
1172 struct net_device *ndev = platform_get_drvdata(dev);
1173 board_info_t *db = (board_info_t *) ndev->priv;
1177 if (netif_running(ndev)) {
1179 dm9000_init_dm9000(ndev);
1181 netif_device_attach(ndev);
1188 dm9000_drv_remove(struct platform_device *pdev)
1190 struct net_device *ndev = platform_get_drvdata(pdev);
1192 platform_set_drvdata(pdev, NULL);
1194 unregister_netdev(ndev);
1195 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1196 free_netdev(ndev); /* free device structure */
1198 PRINTK1("clean_module() exit\n");
1203 static struct platform_driver dm9000_driver = {
1206 .owner = THIS_MODULE,
1208 .probe = dm9000_probe,
1209 .remove = dm9000_drv_remove,
1210 .suspend = dm9000_drv_suspend,
1211 .resume = dm9000_drv_resume,
1217 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1219 return platform_driver_register(&dm9000_driver); /* search board and register */
1223 dm9000_cleanup(void)
1225 platform_driver_unregister(&dm9000_driver);
1228 module_init(dm9000_init);
1229 module_exit(dm9000_cleanup);
1231 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1232 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1233 MODULE_LICENSE("GPL");