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
53 #include <linux/module.h>
54 #include <linux/ioport.h>
55 #include <linux/netdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/init.h>
58 #include <linux/skbuff.h>
59 #include <linux/version.h>
60 #include <linux/spinlock.h>
61 #include <linux/crc32.h>
62 #include <linux/mii.h>
63 #include <linux/dm9000.h>
64 #include <linux/delay.h>
66 #include <asm/delay.h>
72 /* Board/System/Debug information/definition ---------------- */
74 #define DM9000_PHY 0x40 /* PHY address 0x01 */
79 #define CARDNAME "dm9000"
80 #define PFX CARDNAME ": "
82 #define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
84 #define DM9000_DEBUG 0
87 #define PRINTK3(args...) printk(CARDNAME ": " args)
89 #define PRINTK3(args...) do { } while(0)
93 #define PRINTK2(args...) printk(CARDNAME ": " args)
95 #define PRINTK2(args...) do { } while(0)
99 #define PRINTK1(args...) printk(CARDNAME ": " args)
100 #define PRINTK(args...) printk(CARDNAME ": " args)
102 #define PRINTK1(args...) do { } while(0)
103 #define PRINTK(args...) printk(KERN_DEBUG args)
107 * Transmit timeout, default 5 seconds.
109 static int watchdog = 5000;
110 module_param(watchdog, int, 0400);
111 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
113 /* Structure/enum declaration ------------------------------- */
114 typedef struct board_info {
116 void __iomem *io_addr; /* Register I/O base address */
117 void __iomem *io_data; /* Data I/O address */
122 u16 queue_start_addr;
124 u8 io_mode; /* 0:word, 2:byte */
127 void (*inblk)(void __iomem *port, void *data, int length);
128 void (*outblk)(void __iomem *port, void *data, int length);
129 void (*dumpblk)(void __iomem *port, int length);
131 struct resource *addr_res; /* resources found */
132 struct resource *data_res;
133 struct resource *addr_req; /* resources requested */
134 struct resource *data_req;
135 struct resource *irq_res;
137 struct timer_list timer;
138 struct net_device_stats stats;
139 unsigned char srom[128];
142 struct mii_if_info mii;
146 /* function declaration ------------------------------------- */
147 static int dm9000_probe(struct device *);
148 static int dm9000_open(struct net_device *);
149 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
150 static int dm9000_stop(struct net_device *);
151 static int dm9000_do_ioctl(struct net_device *, struct ifreq *, int);
154 static void dm9000_timer(unsigned long);
155 static void dm9000_init_dm9000(struct net_device *);
157 static struct net_device_stats *dm9000_get_stats(struct net_device *);
159 static irqreturn_t dm9000_interrupt(int, void *, struct pt_regs *);
161 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
162 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
164 static u16 read_srom_word(board_info_t *, int);
165 static void dm9000_rx(struct net_device *);
166 static void dm9000_hash_table(struct net_device *);
168 //#define DM9000_PROGRAM_EEPROM
169 #ifdef DM9000_PROGRAM_EEPROM
170 static void program_eeprom(board_info_t * db);
172 /* DM9000 network board routine ---------------------------- */
175 dm9000_reset(board_info_t * db)
177 PRINTK1("dm9000x: resetting\n");
179 writeb(DM9000_NCR, db->io_addr);
181 writeb(NCR_RST, db->io_data);
186 * Read a byte from I/O port
189 ior(board_info_t * db, int reg)
191 writeb(reg, db->io_addr);
192 return readb(db->io_data);
196 * Write a byte to I/O port
200 iow(board_info_t * db, int reg, int value)
202 writeb(reg, db->io_addr);
203 writeb(value, db->io_data);
206 /* routines for sending block to chip */
208 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
210 writesb(reg, data, count);
213 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
215 writesw(reg, data, (count+1) >> 1);
218 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
220 writesl(reg, data, (count+3) >> 2);
223 /* input block from chip to memory */
225 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
227 readsb(reg, data, count+1);
231 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
233 readsw(reg, data, (count+1) >> 1);
236 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
238 readsl(reg, data, (count+3) >> 2);
241 /* dump block from chip to null */
243 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
248 for (i = 0; i < count; i++)
252 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
257 count = (count + 1) >> 1;
259 for (i = 0; i < count; i++)
263 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
268 count = (count + 3) >> 2;
270 for (i = 0; i < count; i++)
276 * select the specified set of io routines to use with the
280 static void dm9000_set_io(struct board_info *db, int byte_width)
282 /* use the size of the data resource to work out what IO
283 * routines we want to use
286 switch (byte_width) {
288 db->dumpblk = dm9000_dumpblk_8bit;
289 db->outblk = dm9000_outblk_8bit;
290 db->inblk = dm9000_inblk_8bit;
294 db->dumpblk = dm9000_dumpblk_16bit;
295 db->outblk = dm9000_outblk_16bit;
296 db->inblk = dm9000_inblk_16bit;
300 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
301 db->dumpblk = dm9000_dumpblk_16bit;
302 db->outblk = dm9000_outblk_16bit;
303 db->inblk = dm9000_inblk_16bit;
308 db->dumpblk = dm9000_dumpblk_32bit;
309 db->outblk = dm9000_outblk_32bit;
310 db->inblk = dm9000_inblk_32bit;
316 /* Our watchdog timed out. Called by the networking layer */
317 static void dm9000_timeout(struct net_device *dev)
319 board_info_t *db = (board_info_t *) dev->priv;
323 /* Save previous register address */
324 reg_save = readb(db->io_addr);
325 spin_lock_irqsave(db->lock,flags);
327 netif_stop_queue(dev);
329 dm9000_init_dm9000(dev);
330 /* We can accept TX packets again */
331 dev->trans_start = jiffies;
332 netif_wake_queue(dev);
334 /* Restore previous register address */
335 writeb(reg_save, db->io_addr);
336 spin_unlock_irqrestore(db->lock,flags);
340 /* dm9000_release_board
342 * release a board, and any mapped resources
346 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
348 if (db->data_res == NULL) {
349 if (db->addr_res != NULL)
350 release_mem_region((unsigned long)db->io_addr, 4);
354 /* unmap our resources */
356 iounmap(db->io_addr);
357 iounmap(db->io_data);
359 /* release the resources */
361 if (db->data_req != NULL) {
362 release_resource(db->data_req);
366 if (db->addr_res != NULL) {
367 release_resource(db->data_req);
372 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
375 * Search DM9000 board, allocate space and register it
378 dm9000_probe(struct device *dev)
380 struct platform_device *pdev = to_platform_device(dev);
381 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
382 struct board_info *db; /* Point a board information structure */
383 struct net_device *ndev;
390 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
392 /* Init network device */
393 ndev = alloc_etherdev(sizeof (struct board_info));
395 printk("%s: could not allocate device.\n", CARDNAME);
399 SET_MODULE_OWNER(ndev);
400 SET_NETDEV_DEV(ndev, dev);
402 PRINTK2("dm9000_probe()");
404 /* setup board info structure */
405 db = (struct board_info *) ndev->priv;
406 memset(db, 0, sizeof (*db));
408 if (pdev->num_resources < 2) {
413 switch (pdev->num_resources) {
415 base = pdev->resource[0].start;
417 if (!request_mem_region(base, 4, ndev->name)) {
422 ndev->base_addr = base;
423 ndev->irq = pdev->resource[1].start;
424 db->io_addr = (void *)base;
425 db->io_data = (void *)(base + 4);
430 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
431 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
432 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
434 if (db->addr_res == NULL || db->data_res == NULL) {
435 printk(KERN_ERR PFX "insufficient resources\n");
440 i = res_size(db->addr_res);
441 db->addr_req = request_mem_region(db->addr_res->start, i,
444 if (db->addr_req == NULL) {
445 printk(KERN_ERR PFX "cannot claim address reg area\n");
450 db->io_addr = ioremap(db->addr_res->start, i);
452 if (db->io_addr == NULL) {
453 printk(KERN_ERR "failed to ioremap address reg\n");
458 iosize = res_size(db->data_res);
459 db->data_req = request_mem_region(db->data_res->start, iosize,
462 if (db->data_req == NULL) {
463 printk(KERN_ERR PFX "cannot claim data reg area\n");
468 db->io_data = ioremap(db->data_res->start, iosize);
470 if (db->io_data == NULL) {
471 printk(KERN_ERR "failed to ioremap data reg\n");
476 /* fill in parameters for net-dev structure */
478 ndev->base_addr = (unsigned long)db->io_addr;
479 ndev->irq = db->irq_res->start;
481 /* ensure at least we have a default set of IO routines */
482 dm9000_set_io(db, iosize);
486 /* check to see if anything is being over-ridden */
488 /* check to see if the driver wants to over-ride the
489 * default IO width */
491 if (pdata->flags & DM9000_PLATF_8BITONLY)
492 dm9000_set_io(db, 1);
494 if (pdata->flags & DM9000_PLATF_16BITONLY)
495 dm9000_set_io(db, 2);
497 if (pdata->flags & DM9000_PLATF_32BITONLY)
498 dm9000_set_io(db, 4);
500 /* check to see if there are any IO routine
503 if (pdata->inblk != NULL)
504 db->inblk = pdata->inblk;
506 if (pdata->outblk != NULL)
507 db->outblk = pdata->outblk;
509 if (pdata->dumpblk != NULL)
510 db->dumpblk = pdata->dumpblk;
515 /* try two times, DM9000 sometimes gets the first read wrong */
516 for (i = 0; i < 2; i++) {
517 id_val = ior(db, DM9000_VIDL);
518 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
519 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
520 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
522 if (id_val == DM9000_ID)
524 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
527 if (id_val != DM9000_ID) {
528 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
532 /* from this point we assume that we have found a DM9000 */
534 /* driver system function */
537 ndev->open = &dm9000_open;
538 ndev->hard_start_xmit = &dm9000_start_xmit;
539 ndev->tx_timeout = &dm9000_timeout;
540 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
541 ndev->stop = &dm9000_stop;
542 ndev->get_stats = &dm9000_get_stats;
543 ndev->set_multicast_list = &dm9000_hash_table;
544 ndev->do_ioctl = &dm9000_do_ioctl;
546 #ifdef DM9000_PROGRAM_EEPROM
549 db->msg_enable = NETIF_MSG_LINK;
550 db->mii.phy_id_mask = 0x1f;
551 db->mii.reg_num_mask = 0x1f;
552 db->mii.force_media = 0;
553 db->mii.full_duplex = 0;
555 db->mii.mdio_read = dm9000_phy_read;
556 db->mii.mdio_write = dm9000_phy_write;
558 /* Read SROM content */
559 for (i = 0; i < 64; i++)
560 ((u16 *) db->srom)[i] = read_srom_word(db, i);
562 /* Set Node Address */
563 for (i = 0; i < 6; i++)
564 ndev->dev_addr[i] = db->srom[i];
566 if (!is_valid_ether_addr(ndev->dev_addr))
567 printk("%s: Invalid ethernet MAC address. Please "
568 "set using ifconfig\n", ndev->name);
570 dev_set_drvdata(dev, ndev);
571 ret = register_netdev(ndev);
574 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
575 ndev->name, db->io_addr, db->io_data, ndev->irq);
576 for (i = 0; i < 5; i++)
577 printk("%02x:", ndev->dev_addr[i]);
578 printk("%02x\n", ndev->dev_addr[5]);
584 printk("%s: not found (%d).\n", CARDNAME, ret);
586 dm9000_release_board(pdev, db);
593 * Open the interface.
594 * The interface is opened whenever "ifconfig" actives it.
597 dm9000_open(struct net_device *dev)
599 board_info_t *db = (board_info_t *) dev->priv;
601 PRINTK2("entering dm9000_open\n");
603 if (request_irq(dev->irq, &dm9000_interrupt, SA_SHIRQ, dev->name, dev))
606 /* Initialize DM9000 board */
608 dm9000_init_dm9000(dev);
610 /* Init driver variable */
613 /* set and active a timer process */
614 init_timer(&db->timer);
615 db->timer.expires = DM9000_TIMER_WUT * 2;
616 db->timer.data = (unsigned long) dev;
617 db->timer.function = &dm9000_timer;
618 add_timer(&db->timer);
620 mii_check_media(&db->mii, netif_msg_link(db), 1);
621 netif_start_queue(dev);
627 * Initilize dm9000 board
630 dm9000_init_dm9000(struct net_device *dev)
632 board_info_t *db = (board_info_t *) dev->priv;
634 PRINTK1("entering %s\n",__FUNCTION__);
637 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
639 /* GPIO0 on pre-activate PHY */
640 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
641 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
642 iow(db, DM9000_GPR, 0); /* Enable PHY */
644 /* Program operating register */
645 iow(db, DM9000_TCR, 0); /* TX Polling clear */
646 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
647 iow(db, DM9000_FCR, 0xff); /* Flow Control */
648 iow(db, DM9000_SMCR, 0); /* Special Mode */
649 /* clear TX status */
650 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
651 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
653 /* Set address filter table */
654 dm9000_hash_table(dev);
656 /* Activate DM9000 */
657 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
658 /* Enable TX/RX interrupt mask */
659 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
661 /* Init Driver variable */
663 db->queue_pkt_len = 0;
664 dev->trans_start = 0;
665 spin_lock_init(&db->lock);
669 * Hardware start transmission.
670 * Send a packet to media from the upper layer.
673 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
675 board_info_t *db = (board_info_t *) dev->priv;
677 PRINTK3("dm9000_start_xmit\n");
679 if (db->tx_pkt_cnt > 1)
682 netif_stop_queue(dev);
684 /* Disable all interrupts */
685 iow(db, DM9000_IMR, IMR_PAR);
687 /* Move data to DM9000 TX RAM */
688 writeb(DM9000_MWCMD, db->io_addr);
690 (db->outblk)(db->io_data, skb->data, skb->len);
691 db->stats.tx_bytes += skb->len;
693 /* TX control: First packet immediately send, second packet queue */
694 if (db->tx_pkt_cnt == 0) {
699 /* Set TX length to DM9000 */
700 iow(db, DM9000_TXPLL, skb->len & 0xff);
701 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
703 /* Issue TX polling command */
704 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
706 dev->trans_start = jiffies; /* save the time stamp */
711 db->queue_pkt_len = skb->len;
717 /* Re-enable resource check */
718 if (db->tx_pkt_cnt == 1)
719 netif_wake_queue(dev);
721 /* Re-enable interrupt */
722 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
728 dm9000_shutdown(struct net_device *dev)
730 board_info_t *db = (board_info_t *) dev->priv;
733 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
734 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
735 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
736 iow(db, DM9000_RCR, 0x00); /* Disable RX */
740 * Stop the interface.
741 * The interface is stopped when it is brought.
744 dm9000_stop(struct net_device *ndev)
746 board_info_t *db = (board_info_t *) ndev->priv;
748 PRINTK1("entering %s\n",__FUNCTION__);
751 del_timer(&db->timer);
753 netif_stop_queue(ndev);
754 netif_carrier_off(ndev);
757 free_irq(ndev->irq, ndev);
759 dm9000_shutdown(ndev);
765 * DM9000 interrupt handler
766 * receive the packet to upper layer, free the transmitted packet
770 dm9000_tx_done(struct net_device *dev, board_info_t * db)
772 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
774 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
775 /* One packet sent complete */
777 db->stats.tx_packets++;
779 /* Queue packet check & send */
780 if (db->tx_pkt_cnt > 0) {
781 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
782 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
783 iow(db, DM9000_TCR, TCR_TXREQ);
784 dev->trans_start = jiffies;
786 netif_wake_queue(dev);
791 dm9000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
793 struct net_device *dev = dev_id;
798 PRINTK3("entering %s\n",__FUNCTION__);
801 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
805 /* A real interrupt coming */
806 db = (board_info_t *) dev->priv;
807 spin_lock(&db->lock);
809 /* Save previous register address */
810 reg_save = readb(db->io_addr);
812 /* Disable all interrupts */
813 iow(db, DM9000_IMR, IMR_PAR);
815 /* Got DM9000 interrupt status */
816 int_status = ior(db, DM9000_ISR); /* Got ISR */
817 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
819 /* Received the coming packet */
820 if (int_status & ISR_PRS)
823 /* Trnasmit Interrupt check */
824 if (int_status & ISR_PTS)
825 dm9000_tx_done(dev, db);
827 /* Re-enable interrupt mask */
828 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
830 /* Restore previous register address */
831 writeb(reg_save, db->io_addr);
833 spin_unlock(&db->lock);
839 * Get statistics from driver.
841 static struct net_device_stats *
842 dm9000_get_stats(struct net_device *dev)
844 board_info_t *db = (board_info_t *) dev->priv;
849 * Process the upper socket ioctl command
852 dm9000_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
854 PRINTK1("entering %s\n",__FUNCTION__);
859 * A periodic timer routine
860 * Dynamic media sense, allocated Rx buffer...
863 dm9000_timer(unsigned long data)
865 struct net_device *dev = (struct net_device *) data;
866 board_info_t *db = (board_info_t *) dev->priv;
870 PRINTK3("dm9000_timer()\n");
872 spin_lock_irqsave(db->lock,flags);
873 /* Save previous register address */
874 reg_save = readb(db->io_addr);
876 mii_check_media(&db->mii, netif_msg_link(db), 0);
878 /* Restore previous register address */
879 writeb(reg_save, db->io_addr);
880 spin_unlock_irqrestore(db->lock,flags);
882 /* Set timer again */
883 db->timer.expires = DM9000_TIMER_WUT;
884 add_timer(&db->timer);
887 struct dm9000_rxhdr {
890 } __attribute__((__packed__));
893 * Received a packet and pass to upper layer
896 dm9000_rx(struct net_device *dev)
898 board_info_t *db = (board_info_t *) dev->priv;
899 struct dm9000_rxhdr rxhdr;
905 /* Check packet ready or not */
907 ior(db, DM9000_MRCMDX); /* Dummy read */
909 /* Get most updated data */
910 rxbyte = readb(db->io_data);
912 /* Status check: this byte must be 0 or 1 */
913 if (rxbyte > DM9000_PKT_RDY) {
914 printk("status check failed: %d\n", rxbyte);
915 iow(db, DM9000_RCR, 0x00); /* Stop Device */
916 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
920 if (rxbyte != DM9000_PKT_RDY)
923 /* A packet ready now & Get status/length */
925 writeb(DM9000_MRCMD, db->io_addr);
927 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
931 /* Packet Status check */
934 PRINTK1("Bad Packet received (runt)\n");
937 if (RxLen > DM9000_PKT_MAX) {
938 PRINTK1("RST: RX Len:%x\n", RxLen);
941 if (rxhdr.RxStatus & 0xbf00) {
943 if (rxhdr.RxStatus & 0x100) {
944 PRINTK1("fifo error\n");
945 db->stats.rx_fifo_errors++;
947 if (rxhdr.RxStatus & 0x200) {
948 PRINTK1("crc error\n");
949 db->stats.rx_crc_errors++;
951 if (rxhdr.RxStatus & 0x8000) {
952 PRINTK1("length error\n");
953 db->stats.rx_length_errors++;
957 /* Move data from DM9000 */
959 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
962 rdptr = (u8 *) skb_put(skb, RxLen - 4);
964 /* Read received packet from RX SRAM */
966 (db->inblk)(db->io_data, rdptr, RxLen);
967 db->stats.rx_bytes += RxLen;
969 /* Pass to upper layer */
970 skb->protocol = eth_type_trans(skb, dev);
972 db->stats.rx_packets++;
975 /* need to dump the packet's data */
977 (db->dumpblk)(db->io_data, RxLen);
979 } while (rxbyte == DM9000_PKT_RDY);
983 * Read a word data from SROM
986 read_srom_word(board_info_t * db, int offset)
988 iow(db, DM9000_EPAR, offset);
989 iow(db, DM9000_EPCR, EPCR_ERPRR);
990 mdelay(8); /* according to the datasheet 200us should be enough,
991 but it doesn't work */
992 iow(db, DM9000_EPCR, 0x0);
993 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
996 #ifdef DM9000_PROGRAM_EEPROM
998 * Write a word data to SROM
1001 write_srom_word(board_info_t * db, int offset, u16 val)
1003 iow(db, DM9000_EPAR, offset);
1004 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1005 iow(db, DM9000_EPDRL, (val & 0xff));
1006 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1007 mdelay(8); /* same shit */
1008 iow(db, DM9000_EPCR, 0);
1012 * Only for development:
1013 * Here we write static data to the eeprom in case
1014 * we don't have valid content on a new board
1017 program_eeprom(board_info_t * db)
1019 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1020 0x0000, /* Autoload: accept nothing */
1021 0x0a46, 0x9000, /* Vendor / Product ID */
1022 0x0000, /* pin control */
1024 }; /* Wake-up mode control */
1026 for (i = 0; i < 8; i++)
1027 write_srom_word(db, i, eeprom[i]);
1033 * Calculate the CRC valude of the Rx packet
1034 * flag = 1 : return the reverse CRC (for the received packet CRC)
1035 * 0 : return the normal CRC (for Hash Table index)
1038 static unsigned long
1039 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1042 u32 crc = ether_crc_le(Len, Data);
1051 * Set DM9000 multicast address
1054 dm9000_hash_table(struct net_device *dev)
1056 board_info_t *db = (board_info_t *) dev->priv;
1057 struct dev_mc_list *mcptr = dev->mc_list;
1058 int mc_cnt = dev->mc_count;
1060 u16 i, oft, hash_table[4];
1061 unsigned long flags;
1063 PRINTK2("dm9000_hash_table()\n");
1065 spin_lock_irqsave(&db->lock,flags);
1067 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1068 iow(db, oft, dev->dev_addr[i]);
1070 /* Clear Hash Table */
1071 for (i = 0; i < 4; i++)
1072 hash_table[i] = 0x0;
1074 /* broadcast address */
1075 hash_table[3] = 0x8000;
1077 /* the multicast address in Hash Table : 64 bits */
1078 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1079 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1080 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1083 /* Write the hash table to MAC MD table */
1084 for (i = 0, oft = 0x16; i < 4; i++) {
1085 iow(db, oft++, hash_table[i] & 0xff);
1086 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1089 spin_unlock_irqrestore(&db->lock,flags);
1094 * Read a word from phyxcer
1097 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1099 board_info_t *db = (board_info_t *) dev->priv;
1100 unsigned long flags;
1103 spin_lock_irqsave(&db->lock,flags);
1104 /* Fill the phyxcer register into REG_0C */
1105 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1107 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1108 udelay(100); /* Wait read complete */
1109 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1111 /* The read data keeps on REG_0D & REG_0E */
1112 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1114 spin_unlock_irqrestore(&db->lock,flags);
1120 * Write a word to phyxcer
1123 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1125 board_info_t *db = (board_info_t *) dev->priv;
1126 unsigned long flags;
1128 spin_lock_irqsave(&db->lock,flags);
1130 /* Fill the phyxcer register into REG_0C */
1131 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1133 /* Fill the written data into REG_0D & REG_0E */
1134 iow(db, DM9000_EPDRL, (value & 0xff));
1135 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1137 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1138 udelay(500); /* Wait write complete */
1139 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1141 spin_unlock_irqrestore(&db->lock,flags);
1145 dm9000_drv_suspend(struct device *dev, u32 state, u32 level)
1147 struct net_device *ndev = dev_get_drvdata(dev);
1149 if (ndev && level == SUSPEND_DISABLE) {
1150 if (netif_running(ndev)) {
1151 netif_device_detach(ndev);
1152 dm9000_shutdown(ndev);
1159 dm9000_drv_resume(struct device *dev, u32 level)
1161 struct net_device *ndev = dev_get_drvdata(dev);
1162 board_info_t *db = (board_info_t *) ndev->priv;
1164 if (ndev && level == RESUME_ENABLE) {
1166 if (netif_running(ndev)) {
1168 dm9000_init_dm9000(ndev);
1170 netif_device_attach(ndev);
1177 dm9000_drv_remove(struct device *dev)
1179 struct platform_device *pdev = to_platform_device(dev);
1180 struct net_device *ndev = dev_get_drvdata(dev);
1182 dev_set_drvdata(dev, NULL);
1184 unregister_netdev(ndev);
1185 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1186 kfree(ndev); /* free device structure */
1188 PRINTK1("clean_module() exit\n");
1193 static struct device_driver dm9000_driver = {
1195 .bus = &platform_bus_type,
1196 .probe = dm9000_probe,
1197 .remove = dm9000_drv_remove,
1198 .suspend = dm9000_drv_suspend,
1199 .resume = dm9000_drv_resume,
1205 return driver_register(&dm9000_driver); /* search board and register */
1209 dm9000_cleanup(void)
1211 driver_unregister(&dm9000_driver);
1214 module_init(dm9000_init);
1215 module_exit(dm9000_cleanup);
1217 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1218 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1219 MODULE_LICENSE("GPL");