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/ethtool.h>
67 #include <linux/dm9000.h>
68 #include <linux/delay.h>
69 #include <linux/platform_device.h>
70 #include <linux/irq.h>
72 #include <asm/delay.h>
78 /* Board/System/Debug information/definition ---------------- */
80 #define DM9000_PHY 0x40 /* PHY address 0x01 */
82 #define CARDNAME "dm9000"
83 #define PFX CARDNAME ": "
84 #define DRV_VERSION "1.30"
86 #ifdef CONFIG_BLACKFIN
93 #define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
95 #define DEFAULT_TRIGGER (0)
99 * Transmit timeout, default 5 seconds.
101 static int watchdog = 5000;
102 module_param(watchdog, int, 0400);
103 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
105 /* Structure/enum declaration ------------------------------- */
106 typedef struct board_info {
108 void __iomem *io_addr; /* Register I/O base address */
109 void __iomem *io_data; /* Data I/O address */
114 u16 queue_start_addr;
116 u8 io_mode; /* 0:word, 2:byte */
119 unsigned int in_suspend :1;
123 void (*inblk)(void __iomem *port, void *data, int length);
124 void (*outblk)(void __iomem *port, void *data, int length);
125 void (*dumpblk)(void __iomem *port, int length);
127 struct device *dev; /* parent device */
129 struct resource *addr_res; /* resources found */
130 struct resource *data_res;
131 struct resource *addr_req; /* resources requested */
132 struct resource *data_req;
133 struct resource *irq_res;
135 unsigned char srom[128];
138 struct mii_if_info mii;
144 #define dm9000_dbg(db, lev, msg...) do { \
145 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
146 (lev) < db->debug_level) { \
147 dev_dbg(db->dev, msg); \
151 static inline board_info_t *to_dm9000_board(struct net_device *dev)
156 /* function declaration ------------------------------------- */
157 static int dm9000_probe(struct platform_device *);
158 static int dm9000_open(struct net_device *);
159 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
160 static int dm9000_stop(struct net_device *);
162 static void dm9000_init_dm9000(struct net_device *);
164 static irqreturn_t dm9000_interrupt(int, void *);
166 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
167 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
169 static u16 read_srom_word(board_info_t *, int);
170 static void dm9000_rx(struct net_device *);
171 static void dm9000_hash_table(struct net_device *);
173 //#define DM9000_PROGRAM_EEPROM
174 #ifdef DM9000_PROGRAM_EEPROM
175 static void program_eeprom(board_info_t * db);
177 /* DM9000 network board routine ---------------------------- */
180 dm9000_reset(board_info_t * db)
182 dev_dbg(db->dev, "resetting device\n");
185 writeb(DM9000_NCR, db->io_addr);
187 writeb(NCR_RST, db->io_data);
192 * Read a byte from I/O port
195 ior(board_info_t * db, int reg)
197 writeb(reg, db->io_addr);
198 return readb(db->io_data);
202 * Write a byte to I/O port
206 iow(board_info_t * db, int reg, int value)
208 writeb(reg, db->io_addr);
209 writeb(value, db->io_data);
212 /* routines for sending block to chip */
214 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
216 writesb(reg, data, count);
219 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
221 writesw(reg, data, (count+1) >> 1);
224 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
226 writesl(reg, data, (count+3) >> 2);
229 /* input block from chip to memory */
231 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
233 readsb(reg, data, count);
237 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
239 readsw(reg, data, (count+1) >> 1);
242 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
244 readsl(reg, data, (count+3) >> 2);
247 /* dump block from chip to null */
249 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
254 for (i = 0; i < count; i++)
258 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
263 count = (count + 1) >> 1;
265 for (i = 0; i < count; i++)
269 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
274 count = (count + 3) >> 2;
276 for (i = 0; i < count; i++)
282 * select the specified set of io routines to use with the
286 static void dm9000_set_io(struct board_info *db, int byte_width)
288 /* use the size of the data resource to work out what IO
289 * routines we want to use
292 switch (byte_width) {
294 db->dumpblk = dm9000_dumpblk_8bit;
295 db->outblk = dm9000_outblk_8bit;
296 db->inblk = dm9000_inblk_8bit;
301 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
303 db->dumpblk = dm9000_dumpblk_16bit;
304 db->outblk = dm9000_outblk_16bit;
305 db->inblk = dm9000_inblk_16bit;
310 db->dumpblk = dm9000_dumpblk_32bit;
311 db->outblk = dm9000_outblk_32bit;
312 db->inblk = dm9000_inblk_32bit;
318 /* Our watchdog timed out. Called by the networking layer */
319 static void dm9000_timeout(struct net_device *dev)
321 board_info_t *db = (board_info_t *) dev->priv;
325 /* Save previous register address */
326 reg_save = readb(db->io_addr);
327 spin_lock_irqsave(&db->lock,flags);
329 netif_stop_queue(dev);
331 dm9000_init_dm9000(dev);
332 /* We can accept TX packets again */
333 dev->trans_start = jiffies;
334 netif_wake_queue(dev);
336 /* Restore previous register address */
337 writeb(reg_save, db->io_addr);
338 spin_unlock_irqrestore(&db->lock,flags);
341 #ifdef CONFIG_NET_POLL_CONTROLLER
345 static void dm9000_poll_controller(struct net_device *dev)
347 disable_irq(dev->irq);
348 dm9000_interrupt(dev->irq,dev);
349 enable_irq(dev->irq);
355 static void dm9000_get_drvinfo(struct net_device *dev,
356 struct ethtool_drvinfo *info)
358 board_info_t *dm = to_dm9000_board(dev);
360 strcpy(info->driver, CARDNAME);
361 strcpy(info->version, DRV_VERSION);
362 strcpy(info->bus_info, to_platform_device(dm->dev)->name);
365 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
367 board_info_t *dm = to_dm9000_board(dev);
370 spin_lock_irqsave(&dm->lock, flags);
371 mii_ethtool_gset(&dm->mii, cmd);
372 spin_lock_irqsave(&dm->lock, flags);
377 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
379 board_info_t *dm = to_dm9000_board(dev);
383 spin_lock_irqsave(&dm->lock, flags);
384 rc = mii_ethtool_sset(&dm->mii, cmd);
385 spin_lock_irqsave(&dm->lock, flags);
390 static int dm9000_nway_reset(struct net_device *dev)
392 board_info_t *dm = to_dm9000_board(dev);
393 return mii_nway_restart(&dm->mii);
396 static u32 dm9000_get_link(struct net_device *dev)
398 board_info_t *dm = to_dm9000_board(dev);
399 return mii_link_ok(&dm->mii);
402 static const struct ethtool_ops dm9000_ethtool_ops = {
403 .get_drvinfo = dm9000_get_drvinfo,
404 .get_settings = dm9000_get_settings,
405 .set_settings = dm9000_set_settings,
406 .nway_reset = dm9000_nway_reset,
407 .get_link = dm9000_get_link,
411 /* dm9000_release_board
413 * release a board, and any mapped resources
417 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
419 if (db->data_res == NULL) {
420 if (db->addr_res != NULL)
421 release_mem_region((unsigned long)db->io_addr, 4);
425 /* unmap our resources */
427 iounmap(db->io_addr);
428 iounmap(db->io_data);
430 /* release the resources */
432 if (db->data_req != NULL) {
433 release_resource(db->data_req);
437 if (db->addr_req != NULL) {
438 release_resource(db->addr_req);
443 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
446 * Search DM9000 board, allocate space and register it
449 dm9000_probe(struct platform_device *pdev)
451 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
452 struct board_info *db; /* Point a board information structure */
453 struct net_device *ndev;
460 /* Init network device */
461 ndev = alloc_etherdev(sizeof (struct board_info));
463 dev_err(&pdev->dev, "could not allocate device.\n");
467 SET_NETDEV_DEV(ndev, &pdev->dev);
469 dev_dbg(&pdev->dev, "dm9000_probe()");
471 /* setup board info structure */
472 db = (struct board_info *) ndev->priv;
473 memset(db, 0, sizeof (*db));
475 db->dev = &pdev->dev;
477 spin_lock_init(&db->lock);
479 if (pdev->num_resources < 2) {
482 } else if (pdev->num_resources == 2) {
483 base = pdev->resource[0].start;
485 if (!request_mem_region(base, 4, ndev->name)) {
490 ndev->base_addr = base;
491 ndev->irq = pdev->resource[1].start;
492 db->io_addr = (void __iomem *)base;
493 db->io_data = (void __iomem *)(base + 4);
495 /* ensure at least we have a default set of IO routines */
496 dm9000_set_io(db, 2);
499 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
500 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
501 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
503 if (db->addr_res == NULL || db->data_res == NULL ||
504 db->irq_res == NULL) {
505 dev_err(db->dev, "insufficient resources\n");
510 i = res_size(db->addr_res);
511 db->addr_req = request_mem_region(db->addr_res->start, i,
514 if (db->addr_req == NULL) {
515 dev_err(db->dev, "cannot claim address reg area\n");
520 db->io_addr = ioremap(db->addr_res->start, i);
522 if (db->io_addr == NULL) {
523 dev_err(db->dev, "failed to ioremap address reg\n");
528 iosize = res_size(db->data_res);
529 db->data_req = request_mem_region(db->data_res->start, iosize,
532 if (db->data_req == NULL) {
533 dev_err(db->dev, "cannot claim data reg area\n");
538 db->io_data = ioremap(db->data_res->start, iosize);
540 if (db->io_data == NULL) {
541 dev_err(db->dev,"failed to ioremap data reg\n");
546 /* fill in parameters for net-dev structure */
548 ndev->base_addr = (unsigned long)db->io_addr;
549 ndev->irq = db->irq_res->start;
551 /* ensure at least we have a default set of IO routines */
552 dm9000_set_io(db, iosize);
555 /* check to see if anything is being over-ridden */
557 /* check to see if the driver wants to over-ride the
558 * default IO width */
560 if (pdata->flags & DM9000_PLATF_8BITONLY)
561 dm9000_set_io(db, 1);
563 if (pdata->flags & DM9000_PLATF_16BITONLY)
564 dm9000_set_io(db, 2);
566 if (pdata->flags & DM9000_PLATF_32BITONLY)
567 dm9000_set_io(db, 4);
569 /* check to see if there are any IO routine
572 if (pdata->inblk != NULL)
573 db->inblk = pdata->inblk;
575 if (pdata->outblk != NULL)
576 db->outblk = pdata->outblk;
578 if (pdata->dumpblk != NULL)
579 db->dumpblk = pdata->dumpblk;
581 db->flags = pdata->flags;
586 /* try two times, DM9000 sometimes gets the first read wrong */
587 for (i = 0; i < 2; i++) {
588 id_val = ior(db, DM9000_VIDL);
589 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
590 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
591 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
593 if (id_val == DM9000_ID)
595 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
598 if (id_val != DM9000_ID) {
599 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
604 /* from this point we assume that we have found a DM9000 */
606 /* driver system function */
609 ndev->open = &dm9000_open;
610 ndev->hard_start_xmit = &dm9000_start_xmit;
611 ndev->tx_timeout = &dm9000_timeout;
612 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
613 ndev->stop = &dm9000_stop;
614 ndev->set_multicast_list = &dm9000_hash_table;
615 ndev->ethtool_ops = &dm9000_ethtool_ops;
617 #ifdef CONFIG_NET_POLL_CONTROLLER
618 ndev->poll_controller = &dm9000_poll_controller;
621 #ifdef DM9000_PROGRAM_EEPROM
624 db->msg_enable = NETIF_MSG_LINK;
625 db->mii.phy_id_mask = 0x1f;
626 db->mii.reg_num_mask = 0x1f;
627 db->mii.force_media = 0;
628 db->mii.full_duplex = 0;
630 db->mii.mdio_read = dm9000_phy_read;
631 db->mii.mdio_write = dm9000_phy_write;
633 /* Read SROM content */
634 for (i = 0; i < 64; i++)
635 ((u16 *) db->srom)[i] = read_srom_word(db, i);
637 /* Set Node Address */
638 for (i = 0; i < 6; i++)
639 ndev->dev_addr[i] = db->srom[i];
641 if (!is_valid_ether_addr(ndev->dev_addr)) {
642 /* try reading from mac */
644 for (i = 0; i < 6; i++)
645 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
648 if (!is_valid_ether_addr(ndev->dev_addr))
649 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
650 "set using ifconfig\n", ndev->name);
652 platform_set_drvdata(pdev, ndev);
653 ret = register_netdev(ndev);
656 DECLARE_MAC_BUF(mac);
657 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
658 ndev->name, db->io_addr, db->io_data, ndev->irq,
659 print_mac(mac, ndev->dev_addr));
664 dev_err(db->dev, "not found (%d).\n", ret);
666 dm9000_release_board(pdev, db);
673 * Open the interface.
674 * The interface is opened whenever "ifconfig" actives it.
677 dm9000_open(struct net_device *dev)
679 board_info_t *db = (board_info_t *) dev->priv;
680 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
682 dev_dbg(db->dev, "entering %s\n", __func__);
684 /* If there is no IRQ type specified, default to something that
685 * may work, and tell the user that this is a problem */
687 if (irqflags == IRQF_TRIGGER_NONE) {
688 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
689 irqflags = DEFAULT_TRIGGER;
692 irqflags |= IRQF_SHARED;
694 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
697 /* Initialize DM9000 board */
699 dm9000_init_dm9000(dev);
701 /* Init driver variable */
704 mii_check_media(&db->mii, netif_msg_link(db), 1);
705 netif_start_queue(dev);
711 * Initilize dm9000 board
714 dm9000_init_dm9000(struct net_device *dev)
716 board_info_t *db = (board_info_t *) dev->priv;
718 dm9000_dbg(db, 1, "entering %s\n", __func__);
721 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
723 /* GPIO0 on pre-activate PHY */
724 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
725 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
726 iow(db, DM9000_GPR, 0); /* Enable PHY */
728 if (db->flags & DM9000_PLATF_EXT_PHY)
729 iow(db, DM9000_NCR, NCR_EXT_PHY);
731 /* Program operating register */
732 iow(db, DM9000_TCR, 0); /* TX Polling clear */
733 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
734 iow(db, DM9000_FCR, 0xff); /* Flow Control */
735 iow(db, DM9000_SMCR, 0); /* Special Mode */
736 /* clear TX status */
737 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
738 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
740 /* Set address filter table */
741 dm9000_hash_table(dev);
743 /* Activate DM9000 */
744 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
745 /* Enable TX/RX interrupt mask */
746 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
748 /* Init Driver variable */
750 db->queue_pkt_len = 0;
751 dev->trans_start = 0;
755 * Hardware start transmission.
756 * Send a packet to media from the upper layer.
759 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
762 board_info_t *db = (board_info_t *) dev->priv;
764 dm9000_dbg(db, 3, "%s:\n", __func__);
766 if (db->tx_pkt_cnt > 1)
769 spin_lock_irqsave(&db->lock, flags);
771 /* Move data to DM9000 TX RAM */
772 writeb(DM9000_MWCMD, db->io_addr);
774 (db->outblk)(db->io_data, skb->data, skb->len);
775 dev->stats.tx_bytes += skb->len;
778 /* TX control: First packet immediately send, second packet queue */
779 if (db->tx_pkt_cnt == 1) {
780 /* Set TX length to DM9000 */
781 iow(db, DM9000_TXPLL, skb->len & 0xff);
782 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
784 /* Issue TX polling command */
785 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
787 dev->trans_start = jiffies; /* save the time stamp */
790 db->queue_pkt_len = skb->len;
791 netif_stop_queue(dev);
794 spin_unlock_irqrestore(&db->lock, flags);
803 dm9000_shutdown(struct net_device *dev)
805 board_info_t *db = (board_info_t *) dev->priv;
808 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
809 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
810 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
811 iow(db, DM9000_RCR, 0x00); /* Disable RX */
815 * Stop the interface.
816 * The interface is stopped when it is brought.
819 dm9000_stop(struct net_device *ndev)
821 board_info_t *db = (board_info_t *) ndev->priv;
823 dm9000_dbg(db, 1, "entering %s\n", __func__);
825 netif_stop_queue(ndev);
826 netif_carrier_off(ndev);
829 free_irq(ndev->irq, ndev);
831 dm9000_shutdown(ndev);
837 * DM9000 interrupt handler
838 * receive the packet to upper layer, free the transmitted packet
842 dm9000_tx_done(struct net_device *dev, board_info_t * db)
844 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
846 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
847 /* One packet sent complete */
849 dev->stats.tx_packets++;
851 /* Queue packet check & send */
852 if (db->tx_pkt_cnt > 0) {
853 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
854 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
855 iow(db, DM9000_TCR, TCR_TXREQ);
856 dev->trans_start = jiffies;
858 netif_wake_queue(dev);
863 dm9000_interrupt(int irq, void *dev_id)
865 struct net_device *dev = dev_id;
866 board_info_t *db = (board_info_t *) dev->priv;
870 dm9000_dbg(db, 3, "entering %s\n", __func__);
872 /* A real interrupt coming */
874 spin_lock(&db->lock);
876 /* Save previous register address */
877 reg_save = readb(db->io_addr);
879 /* Disable all interrupts */
880 iow(db, DM9000_IMR, IMR_PAR);
882 /* Got DM9000 interrupt status */
883 int_status = ior(db, DM9000_ISR); /* Got ISR */
884 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
886 /* Received the coming packet */
887 if (int_status & ISR_PRS)
890 /* Trnasmit Interrupt check */
891 if (int_status & ISR_PTS)
892 dm9000_tx_done(dev, db);
894 /* Re-enable interrupt mask */
895 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
897 /* Restore previous register address */
898 writeb(reg_save, db->io_addr);
900 spin_unlock(&db->lock);
905 struct dm9000_rxhdr {
909 } __attribute__((__packed__));
912 * Received a packet and pass to upper layer
915 dm9000_rx(struct net_device *dev)
917 board_info_t *db = (board_info_t *) dev->priv;
918 struct dm9000_rxhdr rxhdr;
924 /* Check packet ready or not */
926 ior(db, DM9000_MRCMDX); /* Dummy read */
928 /* Get most updated data */
929 rxbyte = readb(db->io_data);
931 /* Status check: this byte must be 0 or 1 */
932 if (rxbyte > DM9000_PKT_RDY) {
933 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
934 iow(db, DM9000_RCR, 0x00); /* Stop Device */
935 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
939 if (rxbyte != DM9000_PKT_RDY)
942 /* A packet ready now & Get status/length */
944 writeb(DM9000_MRCMD, db->io_addr);
946 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
948 RxLen = le16_to_cpu(rxhdr.RxLen);
950 /* Packet Status check */
953 dev_dbg(db->dev, "Bad Packet received (runt)\n");
956 if (RxLen > DM9000_PKT_MAX) {
957 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
960 if (rxhdr.RxStatus & 0xbf) {
962 if (rxhdr.RxStatus & 0x01) {
963 dev_dbg(db->dev, "fifo error\n");
964 dev->stats.rx_fifo_errors++;
966 if (rxhdr.RxStatus & 0x02) {
967 dev_dbg(db->dev, "crc error\n");
968 dev->stats.rx_crc_errors++;
970 if (rxhdr.RxStatus & 0x80) {
971 dev_dbg(db->dev, "length error\n");
972 dev->stats.rx_length_errors++;
976 /* Move data from DM9000 */
978 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
980 rdptr = (u8 *) skb_put(skb, RxLen - 4);
982 /* Read received packet from RX SRAM */
984 (db->inblk)(db->io_data, rdptr, RxLen);
985 dev->stats.rx_bytes += RxLen;
987 /* Pass to upper layer */
988 skb->protocol = eth_type_trans(skb, dev);
990 dev->stats.rx_packets++;
993 /* need to dump the packet's data */
995 (db->dumpblk)(db->io_data, RxLen);
997 } while (rxbyte == DM9000_PKT_RDY);
1001 * Read a word data from SROM
1004 read_srom_word(board_info_t * db, int offset)
1006 iow(db, DM9000_EPAR, offset);
1007 iow(db, DM9000_EPCR, EPCR_ERPRR);
1008 mdelay(8); /* according to the datasheet 200us should be enough,
1009 but it doesn't work */
1010 iow(db, DM9000_EPCR, 0x0);
1011 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
1014 #ifdef DM9000_PROGRAM_EEPROM
1016 * Write a word data to SROM
1019 write_srom_word(board_info_t * db, int offset, u16 val)
1021 iow(db, DM9000_EPAR, offset);
1022 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1023 iow(db, DM9000_EPDRL, (val & 0xff));
1024 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1025 mdelay(8); /* same shit */
1026 iow(db, DM9000_EPCR, 0);
1030 * Only for development:
1031 * Here we write static data to the eeprom in case
1032 * we don't have valid content on a new board
1035 program_eeprom(board_info_t * db)
1037 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1038 0x0000, /* Autoload: accept nothing */
1039 0x0a46, 0x9000, /* Vendor / Product ID */
1040 0x0000, /* pin control */
1042 }; /* Wake-up mode control */
1044 for (i = 0; i < 8; i++)
1045 write_srom_word(db, i, eeprom[i]);
1051 * Calculate the CRC valude of the Rx packet
1052 * flag = 1 : return the reverse CRC (for the received packet CRC)
1053 * 0 : return the normal CRC (for Hash Table index)
1056 static unsigned long
1057 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1060 u32 crc = ether_crc_le(Len, Data);
1069 * Set DM9000 multicast address
1072 dm9000_hash_table(struct net_device *dev)
1074 board_info_t *db = (board_info_t *) dev->priv;
1075 struct dev_mc_list *mcptr = dev->mc_list;
1076 int mc_cnt = dev->mc_count;
1078 u16 i, oft, hash_table[4];
1079 unsigned long flags;
1081 dm9000_dbg(db, 1, "entering %s\n", __func__);
1083 spin_lock_irqsave(&db->lock,flags);
1085 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1086 iow(db, oft, dev->dev_addr[i]);
1088 /* Clear Hash Table */
1089 for (i = 0; i < 4; i++)
1090 hash_table[i] = 0x0;
1092 /* broadcast address */
1093 hash_table[3] = 0x8000;
1095 /* the multicast address in Hash Table : 64 bits */
1096 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1097 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1098 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1101 /* Write the hash table to MAC MD table */
1102 for (i = 0, oft = 0x16; i < 4; i++) {
1103 iow(db, oft++, hash_table[i] & 0xff);
1104 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1107 spin_unlock_irqrestore(&db->lock,flags);
1112 * Sleep, either by using msleep() or if we are suspending, then
1113 * use mdelay() to sleep.
1115 static void dm9000_msleep(board_info_t *db, unsigned int ms)
1124 * Read a word from phyxcer
1127 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1129 board_info_t *db = (board_info_t *) dev->priv;
1130 unsigned long flags;
1131 unsigned int reg_save;
1134 spin_lock_irqsave(&db->lock,flags);
1136 /* Save previous register address */
1137 reg_save = readb(db->io_addr);
1139 /* Fill the phyxcer register into REG_0C */
1140 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1142 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1144 writeb(reg_save, db->io_addr);
1145 spin_unlock_irqrestore(&db->lock,flags);
1147 dm9000_msleep(db, 1); /* Wait read complete */
1149 spin_lock_irqsave(&db->lock,flags);
1150 reg_save = readb(db->io_addr);
1152 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1154 /* The read data keeps on REG_0D & REG_0E */
1155 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1157 /* restore the previous address */
1158 writeb(reg_save, db->io_addr);
1159 spin_unlock_irqrestore(&db->lock,flags);
1165 * Write a word to phyxcer
1168 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1170 board_info_t *db = (board_info_t *) dev->priv;
1171 unsigned long flags;
1172 unsigned long reg_save;
1174 spin_lock_irqsave(&db->lock,flags);
1176 /* Save previous register address */
1177 reg_save = readb(db->io_addr);
1179 /* Fill the phyxcer register into REG_0C */
1180 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1182 /* Fill the written data into REG_0D & REG_0E */
1183 iow(db, DM9000_EPDRL, (value & 0xff));
1184 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1186 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1188 writeb(reg_save, db->io_addr);
1189 spin_unlock_irqrestore(&db->lock,flags);
1191 dm9000_msleep(db, 1); /* Wait write complete */
1193 spin_lock_irqsave(&db->lock,flags);
1194 reg_save = readb(db->io_addr);
1196 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1198 /* restore the previous address */
1199 writeb(reg_save, db->io_addr);
1201 spin_unlock_irqrestore(&db->lock,flags);
1205 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1207 struct net_device *ndev = platform_get_drvdata(dev);
1211 db = (board_info_t *) ndev->priv;
1214 if (netif_running(ndev)) {
1215 netif_device_detach(ndev);
1216 dm9000_shutdown(ndev);
1223 dm9000_drv_resume(struct platform_device *dev)
1225 struct net_device *ndev = platform_get_drvdata(dev);
1226 board_info_t *db = (board_info_t *) ndev->priv;
1230 if (netif_running(ndev)) {
1232 dm9000_init_dm9000(ndev);
1234 netif_device_attach(ndev);
1243 dm9000_drv_remove(struct platform_device *pdev)
1245 struct net_device *ndev = platform_get_drvdata(pdev);
1247 platform_set_drvdata(pdev, NULL);
1249 unregister_netdev(ndev);
1250 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1251 free_netdev(ndev); /* free device structure */
1253 dev_dbg(&pdev->dev, "released and freed device\n");
1257 static struct platform_driver dm9000_driver = {
1260 .owner = THIS_MODULE,
1262 .probe = dm9000_probe,
1263 .remove = dm9000_drv_remove,
1264 .suspend = dm9000_drv_suspend,
1265 .resume = dm9000_drv_resume,
1271 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
1273 return platform_driver_register(&dm9000_driver); /* search board and register */
1277 dm9000_cleanup(void)
1279 platform_driver_unregister(&dm9000_driver);
1282 module_init(dm9000_init);
1283 module_exit(dm9000_cleanup);
1285 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1286 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1287 MODULE_LICENSE("GPL");