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 */
122 void (*inblk)(void __iomem *port, void *data, int length);
123 void (*outblk)(void __iomem *port, void *data, int length);
124 void (*dumpblk)(void __iomem *port, int length);
126 struct device *dev; /* parent device */
128 struct resource *addr_res; /* resources found */
129 struct resource *data_res;
130 struct resource *addr_req; /* resources requested */
131 struct resource *data_req;
132 struct resource *irq_res;
134 unsigned char srom[128];
137 struct mii_if_info mii;
143 #define dm9000_dbg(db, lev, msg...) do { \
144 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
145 (lev) < db->debug_level) { \
146 dev_dbg(db->dev, msg); \
150 static inline board_info_t *to_dm9000_board(struct net_device *dev)
155 /* function declaration ------------------------------------- */
156 static int dm9000_probe(struct platform_device *);
157 static int dm9000_open(struct net_device *);
158 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
159 static int dm9000_stop(struct net_device *);
161 static void dm9000_init_dm9000(struct net_device *);
163 static irqreturn_t dm9000_interrupt(int, void *);
165 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
166 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
168 static u16 read_srom_word(board_info_t *, int);
169 static void dm9000_rx(struct net_device *);
170 static void dm9000_hash_table(struct net_device *);
172 //#define DM9000_PROGRAM_EEPROM
173 #ifdef DM9000_PROGRAM_EEPROM
174 static void program_eeprom(board_info_t * db);
176 /* DM9000 network board routine ---------------------------- */
179 dm9000_reset(board_info_t * db)
181 dev_dbg(db->dev, "resetting device\n");
184 writeb(DM9000_NCR, db->io_addr);
186 writeb(NCR_RST, db->io_data);
191 * Read a byte from I/O port
194 ior(board_info_t * db, int reg)
196 writeb(reg, db->io_addr);
197 return readb(db->io_data);
201 * Write a byte to I/O port
205 iow(board_info_t * db, int reg, int value)
207 writeb(reg, db->io_addr);
208 writeb(value, db->io_data);
211 /* routines for sending block to chip */
213 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
215 writesb(reg, data, count);
218 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
220 writesw(reg, data, (count+1) >> 1);
223 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
225 writesl(reg, data, (count+3) >> 2);
228 /* input block from chip to memory */
230 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
232 readsb(reg, data, count);
236 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
238 readsw(reg, data, (count+1) >> 1);
241 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
243 readsl(reg, data, (count+3) >> 2);
246 /* dump block from chip to null */
248 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
253 for (i = 0; i < count; i++)
257 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
262 count = (count + 1) >> 1;
264 for (i = 0; i < count; i++)
268 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
273 count = (count + 3) >> 2;
275 for (i = 0; i < count; i++)
281 * select the specified set of io routines to use with the
285 static void dm9000_set_io(struct board_info *db, int byte_width)
287 /* use the size of the data resource to work out what IO
288 * routines we want to use
291 switch (byte_width) {
293 db->dumpblk = dm9000_dumpblk_8bit;
294 db->outblk = dm9000_outblk_8bit;
295 db->inblk = dm9000_inblk_8bit;
300 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
302 db->dumpblk = dm9000_dumpblk_16bit;
303 db->outblk = dm9000_outblk_16bit;
304 db->inblk = dm9000_inblk_16bit;
309 db->dumpblk = dm9000_dumpblk_32bit;
310 db->outblk = dm9000_outblk_32bit;
311 db->inblk = dm9000_inblk_32bit;
317 /* Our watchdog timed out. Called by the networking layer */
318 static void dm9000_timeout(struct net_device *dev)
320 board_info_t *db = (board_info_t *) dev->priv;
324 /* Save previous register address */
325 reg_save = readb(db->io_addr);
326 spin_lock_irqsave(&db->lock,flags);
328 netif_stop_queue(dev);
330 dm9000_init_dm9000(dev);
331 /* We can accept TX packets again */
332 dev->trans_start = jiffies;
333 netif_wake_queue(dev);
335 /* Restore previous register address */
336 writeb(reg_save, db->io_addr);
337 spin_unlock_irqrestore(&db->lock,flags);
340 #ifdef CONFIG_NET_POLL_CONTROLLER
344 static void dm9000_poll_controller(struct net_device *dev)
346 disable_irq(dev->irq);
347 dm9000_interrupt(dev->irq,dev);
348 enable_irq(dev->irq);
354 static void dm9000_get_drvinfo(struct net_device *dev,
355 struct ethtool_drvinfo *info)
357 board_info_t *dm = to_dm9000_board(dev);
359 strcpy(info->driver, CARDNAME);
360 strcpy(info->version, DRV_VERSION);
361 strcpy(info->bus_info, to_platform_device(dm->dev)->name);
364 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
366 board_info_t *dm = to_dm9000_board(dev);
369 spin_lock_irqsave(&dm->lock, flags);
370 mii_ethtool_gset(&dm->mii, cmd);
371 spin_lock_irqsave(&dm->lock, flags);
376 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
378 board_info_t *dm = to_dm9000_board(dev);
382 spin_lock_irqsave(&dm->lock, flags);
383 rc = mii_ethtool_sset(&dm->mii, cmd);
384 spin_lock_irqsave(&dm->lock, flags);
389 static int dm9000_nway_reset(struct net_device *dev)
391 board_info_t *dm = to_dm9000_board(dev);
392 return mii_nway_restart(&dm->mii);
395 static u32 dm9000_get_link(struct net_device *dev)
397 board_info_t *dm = to_dm9000_board(dev);
398 return mii_link_ok(&dm->mii);
401 static const struct ethtool_ops dm9000_ethtool_ops = {
402 .get_drvinfo = dm9000_get_drvinfo,
403 .get_settings = dm9000_get_settings,
404 .set_settings = dm9000_set_settings,
405 .nway_reset = dm9000_nway_reset,
406 .get_link = dm9000_get_link,
410 /* dm9000_release_board
412 * release a board, and any mapped resources
416 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
418 if (db->data_res == NULL) {
419 if (db->addr_res != NULL)
420 release_mem_region((unsigned long)db->io_addr, 4);
424 /* unmap our resources */
426 iounmap(db->io_addr);
427 iounmap(db->io_data);
429 /* release the resources */
431 if (db->data_req != NULL) {
432 release_resource(db->data_req);
436 if (db->addr_req != NULL) {
437 release_resource(db->addr_req);
442 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
445 * Search DM9000 board, allocate space and register it
448 dm9000_probe(struct platform_device *pdev)
450 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
451 struct board_info *db; /* Point a board information structure */
452 struct net_device *ndev;
459 /* Init network device */
460 ndev = alloc_etherdev(sizeof (struct board_info));
462 dev_err(&pdev->dev, "could not allocate device.\n");
466 SET_NETDEV_DEV(ndev, &pdev->dev);
468 dev_dbg(&pdev->dev, "dm9000_probe()");
470 /* setup board info structure */
471 db = (struct board_info *) ndev->priv;
472 memset(db, 0, sizeof (*db));
474 db->dev = &pdev->dev;
476 spin_lock_init(&db->lock);
478 if (pdev->num_resources < 2) {
481 } else if (pdev->num_resources == 2) {
482 base = pdev->resource[0].start;
484 if (!request_mem_region(base, 4, ndev->name)) {
489 ndev->base_addr = base;
490 ndev->irq = pdev->resource[1].start;
491 db->io_addr = (void __iomem *)base;
492 db->io_data = (void __iomem *)(base + 4);
494 /* ensure at least we have a default set of IO routines */
495 dm9000_set_io(db, 2);
498 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
499 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
500 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
502 if (db->addr_res == NULL || db->data_res == NULL ||
503 db->irq_res == NULL) {
504 dev_err(db->dev, "insufficient resources\n");
509 i = res_size(db->addr_res);
510 db->addr_req = request_mem_region(db->addr_res->start, i,
513 if (db->addr_req == NULL) {
514 dev_err(db->dev, "cannot claim address reg area\n");
519 db->io_addr = ioremap(db->addr_res->start, i);
521 if (db->io_addr == NULL) {
522 dev_err(db->dev, "failed to ioremap address reg\n");
527 iosize = res_size(db->data_res);
528 db->data_req = request_mem_region(db->data_res->start, iosize,
531 if (db->data_req == NULL) {
532 dev_err(db->dev, "cannot claim data reg area\n");
537 db->io_data = ioremap(db->data_res->start, iosize);
539 if (db->io_data == NULL) {
540 dev_err(db->dev,"failed to ioremap data reg\n");
545 /* fill in parameters for net-dev structure */
547 ndev->base_addr = (unsigned long)db->io_addr;
548 ndev->irq = db->irq_res->start;
550 /* ensure at least we have a default set of IO routines */
551 dm9000_set_io(db, iosize);
554 /* check to see if anything is being over-ridden */
556 /* check to see if the driver wants to over-ride the
557 * default IO width */
559 if (pdata->flags & DM9000_PLATF_8BITONLY)
560 dm9000_set_io(db, 1);
562 if (pdata->flags & DM9000_PLATF_16BITONLY)
563 dm9000_set_io(db, 2);
565 if (pdata->flags & DM9000_PLATF_32BITONLY)
566 dm9000_set_io(db, 4);
568 /* check to see if there are any IO routine
571 if (pdata->inblk != NULL)
572 db->inblk = pdata->inblk;
574 if (pdata->outblk != NULL)
575 db->outblk = pdata->outblk;
577 if (pdata->dumpblk != NULL)
578 db->dumpblk = pdata->dumpblk;
580 db->flags = pdata->flags;
585 /* try two times, DM9000 sometimes gets the first read wrong */
586 for (i = 0; i < 2; i++) {
587 id_val = ior(db, DM9000_VIDL);
588 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
589 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
590 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
592 if (id_val == DM9000_ID)
594 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
597 if (id_val != DM9000_ID) {
598 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
603 /* from this point we assume that we have found a DM9000 */
605 /* driver system function */
608 ndev->open = &dm9000_open;
609 ndev->hard_start_xmit = &dm9000_start_xmit;
610 ndev->tx_timeout = &dm9000_timeout;
611 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
612 ndev->stop = &dm9000_stop;
613 ndev->set_multicast_list = &dm9000_hash_table;
614 ndev->ethtool_ops = &dm9000_ethtool_ops;
616 #ifdef CONFIG_NET_POLL_CONTROLLER
617 ndev->poll_controller = &dm9000_poll_controller;
620 #ifdef DM9000_PROGRAM_EEPROM
623 db->msg_enable = NETIF_MSG_LINK;
624 db->mii.phy_id_mask = 0x1f;
625 db->mii.reg_num_mask = 0x1f;
626 db->mii.force_media = 0;
627 db->mii.full_duplex = 0;
629 db->mii.mdio_read = dm9000_phy_read;
630 db->mii.mdio_write = dm9000_phy_write;
632 /* Read SROM content */
633 for (i = 0; i < 64; i++)
634 ((u16 *) db->srom)[i] = read_srom_word(db, i);
636 /* Set Node Address */
637 for (i = 0; i < 6; i++)
638 ndev->dev_addr[i] = db->srom[i];
640 if (!is_valid_ether_addr(ndev->dev_addr)) {
641 /* try reading from mac */
643 for (i = 0; i < 6; i++)
644 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
647 if (!is_valid_ether_addr(ndev->dev_addr))
648 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
649 "set using ifconfig\n", ndev->name);
651 platform_set_drvdata(pdev, ndev);
652 ret = register_netdev(ndev);
655 DECLARE_MAC_BUF(mac);
656 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
657 ndev->name, db->io_addr, db->io_data, ndev->irq,
658 print_mac(mac, ndev->dev_addr));
663 dev_err(db->dev, "not found (%d).\n", ret);
665 dm9000_release_board(pdev, db);
672 * Open the interface.
673 * The interface is opened whenever "ifconfig" actives it.
676 dm9000_open(struct net_device *dev)
678 board_info_t *db = (board_info_t *) dev->priv;
679 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
681 dev_dbg(db->dev, "entering %s\n", __func__);
683 /* If there is no IRQ type specified, default to something that
684 * may work, and tell the user that this is a problem */
686 if (irqflags == IRQF_TRIGGER_NONE) {
687 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
688 irqflags = DEFAULT_TRIGGER;
691 irqflags |= IRQF_SHARED;
693 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
696 /* Initialize DM9000 board */
698 dm9000_init_dm9000(dev);
700 /* Init driver variable */
703 mii_check_media(&db->mii, netif_msg_link(db), 1);
704 netif_start_queue(dev);
710 * Initilize dm9000 board
713 dm9000_init_dm9000(struct net_device *dev)
715 board_info_t *db = (board_info_t *) dev->priv;
717 dm9000_dbg(db, 1, "entering %s\n", __func__);
720 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
722 /* GPIO0 on pre-activate PHY */
723 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
724 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
725 iow(db, DM9000_GPR, 0); /* Enable PHY */
727 if (db->flags & DM9000_PLATF_EXT_PHY)
728 iow(db, DM9000_NCR, NCR_EXT_PHY);
730 /* Program operating register */
731 iow(db, DM9000_TCR, 0); /* TX Polling clear */
732 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
733 iow(db, DM9000_FCR, 0xff); /* Flow Control */
734 iow(db, DM9000_SMCR, 0); /* Special Mode */
735 /* clear TX status */
736 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
737 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
739 /* Set address filter table */
740 dm9000_hash_table(dev);
742 /* Activate DM9000 */
743 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
744 /* Enable TX/RX interrupt mask */
745 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
747 /* Init Driver variable */
749 db->queue_pkt_len = 0;
750 dev->trans_start = 0;
754 * Hardware start transmission.
755 * Send a packet to media from the upper layer.
758 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
761 board_info_t *db = (board_info_t *) dev->priv;
763 dm9000_dbg(db, 3, "%s:\n", __func__);
765 if (db->tx_pkt_cnt > 1)
768 spin_lock_irqsave(&db->lock, flags);
770 /* Move data to DM9000 TX RAM */
771 writeb(DM9000_MWCMD, db->io_addr);
773 (db->outblk)(db->io_data, skb->data, skb->len);
774 dev->stats.tx_bytes += skb->len;
777 /* TX control: First packet immediately send, second packet queue */
778 if (db->tx_pkt_cnt == 1) {
779 /* Set TX length to DM9000 */
780 iow(db, DM9000_TXPLL, skb->len & 0xff);
781 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
783 /* Issue TX polling command */
784 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
786 dev->trans_start = jiffies; /* save the time stamp */
789 db->queue_pkt_len = skb->len;
790 netif_stop_queue(dev);
793 spin_unlock_irqrestore(&db->lock, flags);
802 dm9000_shutdown(struct net_device *dev)
804 board_info_t *db = (board_info_t *) dev->priv;
807 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
808 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
809 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
810 iow(db, DM9000_RCR, 0x00); /* Disable RX */
814 * Stop the interface.
815 * The interface is stopped when it is brought.
818 dm9000_stop(struct net_device *ndev)
820 board_info_t *db = (board_info_t *) ndev->priv;
822 dm9000_dbg(db, 1, "entering %s\n", __func__);
824 netif_stop_queue(ndev);
825 netif_carrier_off(ndev);
828 free_irq(ndev->irq, ndev);
830 dm9000_shutdown(ndev);
836 * DM9000 interrupt handler
837 * receive the packet to upper layer, free the transmitted packet
841 dm9000_tx_done(struct net_device *dev, board_info_t * db)
843 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
845 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
846 /* One packet sent complete */
848 dev->stats.tx_packets++;
850 /* Queue packet check & send */
851 if (db->tx_pkt_cnt > 0) {
852 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
853 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
854 iow(db, DM9000_TCR, TCR_TXREQ);
855 dev->trans_start = jiffies;
857 netif_wake_queue(dev);
862 dm9000_interrupt(int irq, void *dev_id)
864 struct net_device *dev = dev_id;
865 board_info_t *db = (board_info_t *) dev->priv;
869 dm9000_dbg(db, 3, "entering %s\n", __func__);
871 /* A real interrupt coming */
873 spin_lock(&db->lock);
875 /* Save previous register address */
876 reg_save = readb(db->io_addr);
878 /* Disable all interrupts */
879 iow(db, DM9000_IMR, IMR_PAR);
881 /* Got DM9000 interrupt status */
882 int_status = ior(db, DM9000_ISR); /* Got ISR */
883 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
885 /* Received the coming packet */
886 if (int_status & ISR_PRS)
889 /* Trnasmit Interrupt check */
890 if (int_status & ISR_PTS)
891 dm9000_tx_done(dev, db);
893 /* Re-enable interrupt mask */
894 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
896 /* Restore previous register address */
897 writeb(reg_save, db->io_addr);
899 spin_unlock(&db->lock);
904 struct dm9000_rxhdr {
908 } __attribute__((__packed__));
911 * Received a packet and pass to upper layer
914 dm9000_rx(struct net_device *dev)
916 board_info_t *db = (board_info_t *) dev->priv;
917 struct dm9000_rxhdr rxhdr;
923 /* Check packet ready or not */
925 ior(db, DM9000_MRCMDX); /* Dummy read */
927 /* Get most updated data */
928 rxbyte = readb(db->io_data);
930 /* Status check: this byte must be 0 or 1 */
931 if (rxbyte > DM9000_PKT_RDY) {
932 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
933 iow(db, DM9000_RCR, 0x00); /* Stop Device */
934 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
938 if (rxbyte != DM9000_PKT_RDY)
941 /* A packet ready now & Get status/length */
943 writeb(DM9000_MRCMD, db->io_addr);
945 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
947 RxLen = le16_to_cpu(rxhdr.RxLen);
949 /* Packet Status check */
952 dev_dbg(db->dev, "Bad Packet received (runt)\n");
955 if (RxLen > DM9000_PKT_MAX) {
956 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
959 if (rxhdr.RxStatus & 0xbf) {
961 if (rxhdr.RxStatus & 0x01) {
962 dev_dbg(db->dev, "fifo error\n");
963 dev->stats.rx_fifo_errors++;
965 if (rxhdr.RxStatus & 0x02) {
966 dev_dbg(db->dev, "crc error\n");
967 dev->stats.rx_crc_errors++;
969 if (rxhdr.RxStatus & 0x80) {
970 dev_dbg(db->dev, "length error\n");
971 dev->stats.rx_length_errors++;
975 /* Move data from DM9000 */
977 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
979 rdptr = (u8 *) skb_put(skb, RxLen - 4);
981 /* Read received packet from RX SRAM */
983 (db->inblk)(db->io_data, rdptr, RxLen);
984 dev->stats.rx_bytes += RxLen;
986 /* Pass to upper layer */
987 skb->protocol = eth_type_trans(skb, dev);
989 dev->stats.rx_packets++;
992 /* need to dump the packet's data */
994 (db->dumpblk)(db->io_data, RxLen);
996 } while (rxbyte == DM9000_PKT_RDY);
1000 * Read a word data from SROM
1003 read_srom_word(board_info_t * db, int offset)
1005 iow(db, DM9000_EPAR, offset);
1006 iow(db, DM9000_EPCR, EPCR_ERPRR);
1007 mdelay(8); /* according to the datasheet 200us should be enough,
1008 but it doesn't work */
1009 iow(db, DM9000_EPCR, 0x0);
1010 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
1013 #ifdef DM9000_PROGRAM_EEPROM
1015 * Write a word data to SROM
1018 write_srom_word(board_info_t * db, int offset, u16 val)
1020 iow(db, DM9000_EPAR, offset);
1021 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
1022 iow(db, DM9000_EPDRL, (val & 0xff));
1023 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1024 mdelay(8); /* same shit */
1025 iow(db, DM9000_EPCR, 0);
1029 * Only for development:
1030 * Here we write static data to the eeprom in case
1031 * we don't have valid content on a new board
1034 program_eeprom(board_info_t * db)
1036 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1037 0x0000, /* Autoload: accept nothing */
1038 0x0a46, 0x9000, /* Vendor / Product ID */
1039 0x0000, /* pin control */
1041 }; /* Wake-up mode control */
1043 for (i = 0; i < 8; i++)
1044 write_srom_word(db, i, eeprom[i]);
1050 * Calculate the CRC valude of the Rx packet
1051 * flag = 1 : return the reverse CRC (for the received packet CRC)
1052 * 0 : return the normal CRC (for Hash Table index)
1055 static unsigned long
1056 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1059 u32 crc = ether_crc_le(Len, Data);
1068 * Set DM9000 multicast address
1071 dm9000_hash_table(struct net_device *dev)
1073 board_info_t *db = (board_info_t *) dev->priv;
1074 struct dev_mc_list *mcptr = dev->mc_list;
1075 int mc_cnt = dev->mc_count;
1077 u16 i, oft, hash_table[4];
1078 unsigned long flags;
1080 dm9000_dbg(db, 1, "entering %s\n", __func__);
1082 spin_lock_irqsave(&db->lock,flags);
1084 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1085 iow(db, oft, dev->dev_addr[i]);
1087 /* Clear Hash Table */
1088 for (i = 0; i < 4; i++)
1089 hash_table[i] = 0x0;
1091 /* broadcast address */
1092 hash_table[3] = 0x8000;
1094 /* the multicast address in Hash Table : 64 bits */
1095 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1096 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1097 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1100 /* Write the hash table to MAC MD table */
1101 for (i = 0, oft = 0x16; i < 4; i++) {
1102 iow(db, oft++, hash_table[i] & 0xff);
1103 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1106 spin_unlock_irqrestore(&db->lock,flags);
1111 * Read a word from phyxcer
1114 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1116 board_info_t *db = (board_info_t *) dev->priv;
1117 unsigned long flags;
1118 unsigned int reg_save;
1121 spin_lock_irqsave(&db->lock,flags);
1123 /* Save previous register address */
1124 reg_save = readb(db->io_addr);
1126 /* Fill the phyxcer register into REG_0C */
1127 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1129 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1131 writeb(reg_save, db->io_addr);
1132 spin_unlock_irqrestore(&db->lock,flags);
1134 udelay(100); /* Wait read complete */
1136 spin_lock_irqsave(&db->lock,flags);
1137 reg_save = readb(db->io_addr);
1139 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1141 /* The read data keeps on REG_0D & REG_0E */
1142 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1144 /* restore the previous address */
1145 writeb(reg_save, db->io_addr);
1146 spin_unlock_irqrestore(&db->lock,flags);
1152 * Write a word to phyxcer
1155 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1157 board_info_t *db = (board_info_t *) dev->priv;
1158 unsigned long flags;
1159 unsigned long reg_save;
1161 spin_lock_irqsave(&db->lock,flags);
1163 /* Save previous register address */
1164 reg_save = readb(db->io_addr);
1166 /* Fill the phyxcer register into REG_0C */
1167 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1169 /* Fill the written data into REG_0D & REG_0E */
1170 iow(db, DM9000_EPDRL, (value & 0xff));
1171 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1173 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1175 writeb(reg_save, db->io_addr);
1176 spin_unlock_irqrestore(&db->lock,flags);
1178 udelay(500); /* Wait write complete */
1180 spin_lock_irqsave(&db->lock,flags);
1181 reg_save = readb(db->io_addr);
1183 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1185 /* restore the previous address */
1186 writeb(reg_save, db->io_addr);
1188 spin_unlock_irqrestore(&db->lock,flags);
1192 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1194 struct net_device *ndev = platform_get_drvdata(dev);
1197 if (netif_running(ndev)) {
1198 netif_device_detach(ndev);
1199 dm9000_shutdown(ndev);
1206 dm9000_drv_resume(struct platform_device *dev)
1208 struct net_device *ndev = platform_get_drvdata(dev);
1209 board_info_t *db = (board_info_t *) ndev->priv;
1213 if (netif_running(ndev)) {
1215 dm9000_init_dm9000(ndev);
1217 netif_device_attach(ndev);
1224 dm9000_drv_remove(struct platform_device *pdev)
1226 struct net_device *ndev = platform_get_drvdata(pdev);
1228 platform_set_drvdata(pdev, NULL);
1230 unregister_netdev(ndev);
1231 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1232 free_netdev(ndev); /* free device structure */
1234 dev_dbg(&pdev->dev, "released and freed device\n");
1238 static struct platform_driver dm9000_driver = {
1241 .owner = THIS_MODULE,
1243 .probe = dm9000_probe,
1244 .remove = dm9000_drv_remove,
1245 .suspend = dm9000_drv_suspend,
1246 .resume = dm9000_drv_resume,
1252 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
1254 return platform_driver_register(&dm9000_driver); /* search board and register */
1258 dm9000_cleanup(void)
1260 platform_driver_unregister(&dm9000_driver);
1263 module_init(dm9000_init);
1264 module_exit(dm9000_cleanup);
1266 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1267 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1268 MODULE_LICENSE("GPL");