2 * Davicom DM9000 Fast Ethernet driver for Linux.
3 * Copyright (C) 1997 Sten Wang
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * (C) Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
17 * Additional updates, Copyright:
18 * Ben Dooks <ben@simtec.co.uk>
19 * Sascha Hauer <s.hauer@pengutronix.de>
22 #include <linux/module.h>
23 #include <linux/ioport.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/init.h>
27 #include <linux/skbuff.h>
28 #include <linux/spinlock.h>
29 #include <linux/crc32.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/dm9000.h>
33 #include <linux/delay.h>
34 #include <linux/platform_device.h>
35 #include <linux/irq.h>
37 #include <asm/delay.h>
43 /* Board/System/Debug information/definition ---------------- */
45 #define DM9000_PHY 0x40 /* PHY address 0x01 */
47 #define CARDNAME "dm9000"
48 #define PFX CARDNAME ": "
49 #define DRV_VERSION "1.30"
51 #ifdef CONFIG_BLACKFIN
58 #define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
60 #define DEFAULT_TRIGGER (0)
64 * Transmit timeout, default 5 seconds.
66 static int watchdog = 5000;
67 module_param(watchdog, int, 0400);
68 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
70 /* DM9000 register address locking.
72 * The DM9000 uses an address register to control where data written
73 * to the data register goes. This means that the address register
74 * must be preserved over interrupts or similar calls.
76 * During interrupt and other critical calls, a spinlock is used to
77 * protect the system, but the calls themselves save the address
78 * in the address register in case they are interrupting another
79 * access to the device.
81 * For general accesses a lock is provided so that calls which are
82 * allowed to sleep are serialised so that the address register does
83 * not need to be saved. This lock also serves to serialise access
84 * to the EEPROM and PHY access registers which are shared between
88 /* Structure/enum declaration ------------------------------- */
89 typedef struct board_info {
91 void __iomem *io_addr; /* Register I/O base address */
92 void __iomem *io_data; /* Data I/O address */
99 u8 io_mode; /* 0:word, 2:byte */
102 unsigned int in_suspend :1;
106 void (*inblk)(void __iomem *port, void *data, int length);
107 void (*outblk)(void __iomem *port, void *data, int length);
108 void (*dumpblk)(void __iomem *port, int length);
110 struct device *dev; /* parent device */
112 struct resource *addr_res; /* resources found */
113 struct resource *data_res;
114 struct resource *addr_req; /* resources requested */
115 struct resource *data_req;
116 struct resource *irq_res;
118 struct mutex addr_lock; /* phy and eeprom access lock */
120 struct delayed_work phy_poll;
121 struct net_device *ndev;
125 struct mii_if_info mii;
131 #define dm9000_dbg(db, lev, msg...) do { \
132 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
133 (lev) < db->debug_level) { \
134 dev_dbg(db->dev, msg); \
138 static inline board_info_t *to_dm9000_board(struct net_device *dev)
143 /* function declaration ------------------------------------- */
144 static int dm9000_probe(struct platform_device *);
145 static int dm9000_open(struct net_device *);
146 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
147 static int dm9000_stop(struct net_device *);
148 static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd);
150 static void dm9000_init_dm9000(struct net_device *);
152 static irqreturn_t dm9000_interrupt(int, void *);
154 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
155 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
158 static void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
159 static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
160 static void dm9000_rx(struct net_device *);
161 static void dm9000_hash_table(struct net_device *);
163 /* DM9000 network board routine ---------------------------- */
166 dm9000_reset(board_info_t * db)
168 dev_dbg(db->dev, "resetting device\n");
171 writeb(DM9000_NCR, db->io_addr);
173 writeb(NCR_RST, db->io_data);
178 * Read a byte from I/O port
181 ior(board_info_t * db, int reg)
183 writeb(reg, db->io_addr);
184 return readb(db->io_data);
188 * Write a byte to I/O port
192 iow(board_info_t * db, int reg, int value)
194 writeb(reg, db->io_addr);
195 writeb(value, db->io_data);
198 /* routines for sending block to chip */
200 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
202 writesb(reg, data, count);
205 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
207 writesw(reg, data, (count+1) >> 1);
210 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
212 writesl(reg, data, (count+3) >> 2);
215 /* input block from chip to memory */
217 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
219 readsb(reg, data, count);
223 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
225 readsw(reg, data, (count+1) >> 1);
228 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
230 readsl(reg, data, (count+3) >> 2);
233 /* dump block from chip to null */
235 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
240 for (i = 0; i < count; i++)
244 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
249 count = (count + 1) >> 1;
251 for (i = 0; i < count; i++)
255 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
260 count = (count + 3) >> 2;
262 for (i = 0; i < count; i++)
268 * select the specified set of io routines to use with the
272 static void dm9000_set_io(struct board_info *db, int byte_width)
274 /* use the size of the data resource to work out what IO
275 * routines we want to use
278 switch (byte_width) {
280 db->dumpblk = dm9000_dumpblk_8bit;
281 db->outblk = dm9000_outblk_8bit;
282 db->inblk = dm9000_inblk_8bit;
287 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
289 db->dumpblk = dm9000_dumpblk_16bit;
290 db->outblk = dm9000_outblk_16bit;
291 db->inblk = dm9000_inblk_16bit;
296 db->dumpblk = dm9000_dumpblk_32bit;
297 db->outblk = dm9000_outblk_32bit;
298 db->inblk = dm9000_inblk_32bit;
303 static void dm9000_schedule_poll(board_info_t *db)
305 schedule_delayed_work(&db->phy_poll, HZ * 2);
308 /* Our watchdog timed out. Called by the networking layer */
309 static void dm9000_timeout(struct net_device *dev)
311 board_info_t *db = (board_info_t *) dev->priv;
315 /* Save previous register address */
316 reg_save = readb(db->io_addr);
317 spin_lock_irqsave(&db->lock,flags);
319 netif_stop_queue(dev);
321 dm9000_init_dm9000(dev);
322 /* We can accept TX packets again */
323 dev->trans_start = jiffies;
324 netif_wake_queue(dev);
326 /* Restore previous register address */
327 writeb(reg_save, db->io_addr);
328 spin_unlock_irqrestore(&db->lock,flags);
331 #ifdef CONFIG_NET_POLL_CONTROLLER
335 static void dm9000_poll_controller(struct net_device *dev)
337 disable_irq(dev->irq);
338 dm9000_interrupt(dev->irq,dev);
339 enable_irq(dev->irq);
343 static int dm9000_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
345 board_info_t *dm = to_dm9000_board(dev);
347 if (!netif_running(dev))
350 return generic_mii_ioctl(&dm->mii, if_mii(req), cmd, NULL);
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 u32 dm9000_get_msglevel(struct net_device *dev)
367 board_info_t *dm = to_dm9000_board(dev);
369 return dm->msg_enable;
372 static void dm9000_set_msglevel(struct net_device *dev, u32 value)
374 board_info_t *dm = to_dm9000_board(dev);
376 dm->msg_enable = value;
379 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
381 board_info_t *dm = to_dm9000_board(dev);
383 mii_ethtool_gset(&dm->mii, cmd);
387 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
389 board_info_t *dm = to_dm9000_board(dev);
391 return mii_ethtool_sset(&dm->mii, cmd);
394 static int dm9000_nway_reset(struct net_device *dev)
396 board_info_t *dm = to_dm9000_board(dev);
397 return mii_nway_restart(&dm->mii);
400 static u32 dm9000_get_link(struct net_device *dev)
402 board_info_t *dm = to_dm9000_board(dev);
403 return mii_link_ok(&dm->mii);
406 #define DM_EEPROM_MAGIC (0x444D394B)
408 static int dm9000_get_eeprom_len(struct net_device *dev)
413 static int dm9000_get_eeprom(struct net_device *dev,
414 struct ethtool_eeprom *ee, u8 *data)
416 board_info_t *dm = to_dm9000_board(dev);
417 int offset = ee->offset;
421 /* EEPROM access is aligned to two bytes */
423 if ((len & 1) != 0 || (offset & 1) != 0)
426 if (dm->flags & DM9000_PLATF_NO_EEPROM)
429 ee->magic = DM_EEPROM_MAGIC;
431 for (i = 0; i < len; i += 2)
432 dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
437 static int dm9000_set_eeprom(struct net_device *dev,
438 struct ethtool_eeprom *ee, u8 *data)
440 board_info_t *dm = to_dm9000_board(dev);
441 int offset = ee->offset;
445 /* EEPROM access is aligned to two bytes */
447 if ((len & 1) != 0 || (offset & 1) != 0)
450 if (dm->flags & DM9000_PLATF_NO_EEPROM)
453 if (ee->magic != DM_EEPROM_MAGIC)
456 for (i = 0; i < len; i += 2)
457 dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
462 static const struct ethtool_ops dm9000_ethtool_ops = {
463 .get_drvinfo = dm9000_get_drvinfo,
464 .get_settings = dm9000_get_settings,
465 .set_settings = dm9000_set_settings,
466 .get_msglevel = dm9000_get_msglevel,
467 .set_msglevel = dm9000_set_msglevel,
468 .nway_reset = dm9000_nway_reset,
469 .get_link = dm9000_get_link,
470 .get_eeprom_len = dm9000_get_eeprom_len,
471 .get_eeprom = dm9000_get_eeprom,
472 .set_eeprom = dm9000_set_eeprom,
476 dm9000_poll_work(struct work_struct *w)
478 struct delayed_work *dw = container_of(w, struct delayed_work, work);
479 board_info_t *db = container_of(dw, board_info_t, phy_poll);
481 mii_check_media(&db->mii, netif_msg_link(db), 0);
483 if (netif_running(db->ndev))
484 dm9000_schedule_poll(db);
487 /* dm9000_release_board
489 * release a board, and any mapped resources
493 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
495 if (db->data_res == NULL) {
496 if (db->addr_res != NULL)
497 release_mem_region((unsigned long)db->io_addr, 4);
501 /* unmap our resources */
503 iounmap(db->io_addr);
504 iounmap(db->io_data);
506 /* release the resources */
508 if (db->data_req != NULL) {
509 release_resource(db->data_req);
513 if (db->addr_req != NULL) {
514 release_resource(db->addr_req);
519 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
522 * Search DM9000 board, allocate space and register it
525 dm9000_probe(struct platform_device *pdev)
527 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
528 struct board_info *db; /* Point a board information structure */
529 struct net_device *ndev;
530 const unsigned char *mac_src;
537 /* Init network device */
538 ndev = alloc_etherdev(sizeof (struct board_info));
540 dev_err(&pdev->dev, "could not allocate device.\n");
544 SET_NETDEV_DEV(ndev, &pdev->dev);
546 dev_dbg(&pdev->dev, "dm9000_probe()\n");
548 /* setup board info structure */
549 db = (struct board_info *) ndev->priv;
550 memset(db, 0, sizeof (*db));
552 db->dev = &pdev->dev;
555 spin_lock_init(&db->lock);
556 mutex_init(&db->addr_lock);
558 INIT_DELAYED_WORK(&db->phy_poll, dm9000_poll_work);
561 if (pdev->num_resources < 2) {
564 } else if (pdev->num_resources == 2) {
565 base = pdev->resource[0].start;
567 if (!request_mem_region(base, 4, ndev->name)) {
572 ndev->base_addr = base;
573 ndev->irq = pdev->resource[1].start;
574 db->io_addr = (void __iomem *)base;
575 db->io_data = (void __iomem *)(base + 4);
577 /* ensure at least we have a default set of IO routines */
578 dm9000_set_io(db, 2);
581 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
582 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
583 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
585 if (db->addr_res == NULL || db->data_res == NULL ||
586 db->irq_res == NULL) {
587 dev_err(db->dev, "insufficient resources\n");
592 i = res_size(db->addr_res);
593 db->addr_req = request_mem_region(db->addr_res->start, i,
596 if (db->addr_req == NULL) {
597 dev_err(db->dev, "cannot claim address reg area\n");
602 db->io_addr = ioremap(db->addr_res->start, i);
604 if (db->io_addr == NULL) {
605 dev_err(db->dev, "failed to ioremap address reg\n");
610 iosize = res_size(db->data_res);
611 db->data_req = request_mem_region(db->data_res->start, iosize,
614 if (db->data_req == NULL) {
615 dev_err(db->dev, "cannot claim data reg area\n");
620 db->io_data = ioremap(db->data_res->start, iosize);
622 if (db->io_data == NULL) {
623 dev_err(db->dev,"failed to ioremap data reg\n");
628 /* fill in parameters for net-dev structure */
630 ndev->base_addr = (unsigned long)db->io_addr;
631 ndev->irq = db->irq_res->start;
633 /* ensure at least we have a default set of IO routines */
634 dm9000_set_io(db, iosize);
637 /* check to see if anything is being over-ridden */
639 /* check to see if the driver wants to over-ride the
640 * default IO width */
642 if (pdata->flags & DM9000_PLATF_8BITONLY)
643 dm9000_set_io(db, 1);
645 if (pdata->flags & DM9000_PLATF_16BITONLY)
646 dm9000_set_io(db, 2);
648 if (pdata->flags & DM9000_PLATF_32BITONLY)
649 dm9000_set_io(db, 4);
651 /* check to see if there are any IO routine
654 if (pdata->inblk != NULL)
655 db->inblk = pdata->inblk;
657 if (pdata->outblk != NULL)
658 db->outblk = pdata->outblk;
660 if (pdata->dumpblk != NULL)
661 db->dumpblk = pdata->dumpblk;
663 db->flags = pdata->flags;
668 /* try two times, DM9000 sometimes gets the first read wrong */
669 for (i = 0; i < 8; i++) {
670 id_val = ior(db, DM9000_VIDL);
671 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
672 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
673 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
675 if (id_val == DM9000_ID)
677 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
680 if (id_val != DM9000_ID) {
681 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
686 /* from this point we assume that we have found a DM9000 */
688 /* driver system function */
691 ndev->open = &dm9000_open;
692 ndev->hard_start_xmit = &dm9000_start_xmit;
693 ndev->tx_timeout = &dm9000_timeout;
694 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
695 ndev->stop = &dm9000_stop;
696 ndev->set_multicast_list = &dm9000_hash_table;
697 ndev->ethtool_ops = &dm9000_ethtool_ops;
698 ndev->do_ioctl = &dm9000_ioctl;
700 #ifdef CONFIG_NET_POLL_CONTROLLER
701 ndev->poll_controller = &dm9000_poll_controller;
704 db->msg_enable = NETIF_MSG_LINK;
705 db->mii.phy_id_mask = 0x1f;
706 db->mii.reg_num_mask = 0x1f;
707 db->mii.force_media = 0;
708 db->mii.full_duplex = 0;
710 db->mii.mdio_read = dm9000_phy_read;
711 db->mii.mdio_write = dm9000_phy_write;
715 /* try reading the node address from the attached EEPROM */
716 for (i = 0; i < 6; i += 2)
717 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
719 if (!is_valid_ether_addr(ndev->dev_addr)) {
720 /* try reading from mac */
723 for (i = 0; i < 6; i++)
724 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
727 if (!is_valid_ether_addr(ndev->dev_addr))
728 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
729 "set using ifconfig\n", ndev->name);
731 platform_set_drvdata(pdev, ndev);
732 ret = register_netdev(ndev);
735 DECLARE_MAC_BUF(mac);
736 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s (%s)\n",
737 ndev->name, db->io_addr, db->io_data, ndev->irq,
738 print_mac(mac, ndev->dev_addr), mac_src);
743 dev_err(db->dev, "not found (%d).\n", ret);
745 dm9000_release_board(pdev, db);
752 * Open the interface.
753 * The interface is opened whenever "ifconfig" actives it.
756 dm9000_open(struct net_device *dev)
758 board_info_t *db = (board_info_t *) dev->priv;
759 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
761 if (netif_msg_ifup(db))
762 dev_dbg(db->dev, "enabling %s\n", dev->name);
764 /* If there is no IRQ type specified, default to something that
765 * may work, and tell the user that this is a problem */
767 if (irqflags == IRQF_TRIGGER_NONE) {
768 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
769 irqflags = DEFAULT_TRIGGER;
772 irqflags |= IRQF_SHARED;
774 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
777 /* Initialize DM9000 board */
779 dm9000_init_dm9000(dev);
781 /* Init driver variable */
784 mii_check_media(&db->mii, netif_msg_link(db), 1);
785 netif_start_queue(dev);
787 dm9000_schedule_poll(db);
793 * Initilize dm9000 board
796 dm9000_init_dm9000(struct net_device *dev)
798 board_info_t *db = (board_info_t *) dev->priv;
800 dm9000_dbg(db, 1, "entering %s\n", __func__);
803 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
805 /* GPIO0 on pre-activate PHY */
806 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
807 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
808 iow(db, DM9000_GPR, 0); /* Enable PHY */
810 if (db->flags & DM9000_PLATF_EXT_PHY)
811 iow(db, DM9000_NCR, NCR_EXT_PHY);
813 /* Program operating register */
814 iow(db, DM9000_TCR, 0); /* TX Polling clear */
815 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
816 iow(db, DM9000_FCR, 0xff); /* Flow Control */
817 iow(db, DM9000_SMCR, 0); /* Special Mode */
818 /* clear TX status */
819 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
820 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
822 /* Set address filter table */
823 dm9000_hash_table(dev);
825 /* Enable TX/RX interrupt mask */
826 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
828 /* Init Driver variable */
830 db->queue_pkt_len = 0;
831 dev->trans_start = 0;
835 * Hardware start transmission.
836 * Send a packet to media from the upper layer.
839 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
842 board_info_t *db = (board_info_t *) dev->priv;
844 dm9000_dbg(db, 3, "%s:\n", __func__);
846 if (db->tx_pkt_cnt > 1)
849 spin_lock_irqsave(&db->lock, flags);
851 /* Move data to DM9000 TX RAM */
852 writeb(DM9000_MWCMD, db->io_addr);
854 (db->outblk)(db->io_data, skb->data, skb->len);
855 dev->stats.tx_bytes += skb->len;
858 /* TX control: First packet immediately send, second packet queue */
859 if (db->tx_pkt_cnt == 1) {
860 /* Set TX length to DM9000 */
861 iow(db, DM9000_TXPLL, skb->len);
862 iow(db, DM9000_TXPLH, skb->len >> 8);
864 /* Issue TX polling command */
865 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
867 dev->trans_start = jiffies; /* save the time stamp */
870 db->queue_pkt_len = skb->len;
871 netif_stop_queue(dev);
874 spin_unlock_irqrestore(&db->lock, flags);
883 dm9000_shutdown(struct net_device *dev)
885 board_info_t *db = (board_info_t *) dev->priv;
888 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
889 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
890 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
891 iow(db, DM9000_RCR, 0x00); /* Disable RX */
895 * Stop the interface.
896 * The interface is stopped when it is brought.
899 dm9000_stop(struct net_device *ndev)
901 board_info_t *db = (board_info_t *) ndev->priv;
903 if (netif_msg_ifdown(db))
904 dev_dbg(db->dev, "shutting down %s\n", ndev->name);
906 cancel_delayed_work_sync(&db->phy_poll);
908 netif_stop_queue(ndev);
909 netif_carrier_off(ndev);
912 free_irq(ndev->irq, ndev);
914 dm9000_shutdown(ndev);
920 * DM9000 interrupt handler
921 * receive the packet to upper layer, free the transmitted packet
925 dm9000_tx_done(struct net_device *dev, board_info_t * db)
927 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
929 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
930 /* One packet sent complete */
932 dev->stats.tx_packets++;
934 if (netif_msg_tx_done(db))
935 dev_dbg(db->dev, "tx done, NSR %02x\n", tx_status);
937 /* Queue packet check & send */
938 if (db->tx_pkt_cnt > 0) {
939 iow(db, DM9000_TXPLL, db->queue_pkt_len);
940 iow(db, DM9000_TXPLH, db->queue_pkt_len >> 8);
941 iow(db, DM9000_TCR, TCR_TXREQ);
942 dev->trans_start = jiffies;
944 netif_wake_queue(dev);
949 dm9000_interrupt(int irq, void *dev_id)
951 struct net_device *dev = dev_id;
952 board_info_t *db = (board_info_t *) dev->priv;
956 dm9000_dbg(db, 3, "entering %s\n", __func__);
958 /* A real interrupt coming */
960 spin_lock(&db->lock);
962 /* Save previous register address */
963 reg_save = readb(db->io_addr);
965 /* Disable all interrupts */
966 iow(db, DM9000_IMR, IMR_PAR);
968 /* Got DM9000 interrupt status */
969 int_status = ior(db, DM9000_ISR); /* Got ISR */
970 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
972 if (netif_msg_intr(db))
973 dev_dbg(db->dev, "interrupt status %02x\n", int_status);
975 /* Received the coming packet */
976 if (int_status & ISR_PRS)
979 /* Trnasmit Interrupt check */
980 if (int_status & ISR_PTS)
981 dm9000_tx_done(dev, db);
983 /* Re-enable interrupt mask */
984 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
986 /* Restore previous register address */
987 writeb(reg_save, db->io_addr);
989 spin_unlock(&db->lock);
994 struct dm9000_rxhdr {
998 } __attribute__((__packed__));
1001 * Received a packet and pass to upper layer
1004 dm9000_rx(struct net_device *dev)
1006 board_info_t *db = (board_info_t *) dev->priv;
1007 struct dm9000_rxhdr rxhdr;
1008 struct sk_buff *skb;
1013 /* Check packet ready or not */
1015 ior(db, DM9000_MRCMDX); /* Dummy read */
1017 /* Get most updated data */
1018 rxbyte = readb(db->io_data);
1020 /* Status check: this byte must be 0 or 1 */
1021 if (rxbyte > DM9000_PKT_RDY) {
1022 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
1023 iow(db, DM9000_RCR, 0x00); /* Stop Device */
1024 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
1028 if (rxbyte != DM9000_PKT_RDY)
1031 /* A packet ready now & Get status/length */
1033 writeb(DM9000_MRCMD, db->io_addr);
1035 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
1037 RxLen = le16_to_cpu(rxhdr.RxLen);
1039 if (netif_msg_rx_status(db))
1040 dev_dbg(db->dev, "RX: status %02x, length %04x\n",
1041 rxhdr.RxStatus, RxLen);
1043 /* Packet Status check */
1046 if (netif_msg_rx_err(db))
1047 dev_dbg(db->dev, "RX: Bad Packet (runt)\n");
1050 if (RxLen > DM9000_PKT_MAX) {
1051 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
1054 if (rxhdr.RxStatus & 0xbf) {
1056 if (rxhdr.RxStatus & 0x01) {
1057 if (netif_msg_rx_err(db))
1058 dev_dbg(db->dev, "fifo error\n");
1059 dev->stats.rx_fifo_errors++;
1061 if (rxhdr.RxStatus & 0x02) {
1062 if (netif_msg_rx_err(db))
1063 dev_dbg(db->dev, "crc error\n");
1064 dev->stats.rx_crc_errors++;
1066 if (rxhdr.RxStatus & 0x80) {
1067 if (netif_msg_rx_err(db))
1068 dev_dbg(db->dev, "length error\n");
1069 dev->stats.rx_length_errors++;
1073 /* Move data from DM9000 */
1075 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
1076 skb_reserve(skb, 2);
1077 rdptr = (u8 *) skb_put(skb, RxLen - 4);
1079 /* Read received packet from RX SRAM */
1081 (db->inblk)(db->io_data, rdptr, RxLen);
1082 dev->stats.rx_bytes += RxLen;
1084 /* Pass to upper layer */
1085 skb->protocol = eth_type_trans(skb, dev);
1087 dev->stats.rx_packets++;
1090 /* need to dump the packet's data */
1092 (db->dumpblk)(db->io_data, RxLen);
1094 } while (rxbyte == DM9000_PKT_RDY);
1098 dm9000_read_locked(board_info_t *db, int reg)
1100 unsigned long flags;
1103 spin_lock_irqsave(&db->lock, flags);
1105 spin_unlock_irqrestore(&db->lock, flags);
1110 static int dm9000_wait_eeprom(board_info_t *db)
1112 unsigned int status;
1113 int timeout = 8; /* wait max 8msec */
1115 /* The DM9000 data sheets say we should be able to
1116 * poll the ERRE bit in EPCR to wait for the EEPROM
1117 * operation. From testing several chips, this bit
1118 * does not seem to work.
1120 * We attempt to use the bit, but fall back to the
1121 * timeout (which is why we do not return an error
1122 * on expiry) to say that the EEPROM operation has
1127 status = dm9000_read_locked(db, DM9000_EPCR);
1129 if ((status & EPCR_ERRE) == 0)
1132 if (timeout-- < 0) {
1133 dev_dbg(db->dev, "timeout waiting EEPROM\n");
1142 * Read a word data from EEPROM
1145 dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
1147 unsigned long flags;
1149 if (db->flags & DM9000_PLATF_NO_EEPROM) {
1155 mutex_lock(&db->addr_lock);
1157 spin_lock_irqsave(&db->lock, flags);
1159 iow(db, DM9000_EPAR, offset);
1160 iow(db, DM9000_EPCR, EPCR_ERPRR);
1162 spin_unlock_irqrestore(&db->lock, flags);
1164 dm9000_wait_eeprom(db);
1166 /* delay for at-least 150uS */
1169 spin_lock_irqsave(&db->lock, flags);
1171 iow(db, DM9000_EPCR, 0x0);
1173 to[0] = ior(db, DM9000_EPDRL);
1174 to[1] = ior(db, DM9000_EPDRH);
1176 spin_unlock_irqrestore(&db->lock, flags);
1178 mutex_unlock(&db->addr_lock);
1182 * Write a word data to SROM
1185 dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
1187 unsigned long flags;
1189 if (db->flags & DM9000_PLATF_NO_EEPROM)
1192 mutex_lock(&db->addr_lock);
1194 spin_lock_irqsave(&db->lock, flags);
1195 iow(db, DM9000_EPAR, offset);
1196 iow(db, DM9000_EPDRH, data[1]);
1197 iow(db, DM9000_EPDRL, data[0]);
1198 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1199 spin_unlock_irqrestore(&db->lock, flags);
1201 dm9000_wait_eeprom(db);
1203 mdelay(1); /* wait at least 150uS to clear */
1205 spin_lock_irqsave(&db->lock, flags);
1206 iow(db, DM9000_EPCR, 0);
1207 spin_unlock_irqrestore(&db->lock, flags);
1209 mutex_unlock(&db->addr_lock);
1213 * Set DM9000 multicast address
1216 dm9000_hash_table(struct net_device *dev)
1218 board_info_t *db = (board_info_t *) dev->priv;
1219 struct dev_mc_list *mcptr = dev->mc_list;
1220 int mc_cnt = dev->mc_count;
1224 u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
1225 unsigned long flags;
1227 dm9000_dbg(db, 1, "entering %s\n", __func__);
1229 spin_lock_irqsave(&db->lock, flags);
1231 for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
1232 iow(db, oft, dev->dev_addr[i]);
1234 /* Clear Hash Table */
1235 for (i = 0; i < 4; i++)
1236 hash_table[i] = 0x0;
1238 /* broadcast address */
1239 hash_table[3] = 0x8000;
1241 if (dev->flags & IFF_PROMISC)
1244 if (dev->flags & IFF_ALLMULTI)
1247 /* the multicast address in Hash Table : 64 bits */
1248 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1249 hash_val = ether_crc_le(6, mcptr->dmi_addr) & 0x3f;
1250 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1253 /* Write the hash table to MAC MD table */
1254 for (i = 0, oft = DM9000_MAR; i < 4; i++) {
1255 iow(db, oft++, hash_table[i]);
1256 iow(db, oft++, hash_table[i] >> 8);
1259 iow(db, DM9000_RCR, rcr);
1260 spin_unlock_irqrestore(&db->lock, flags);
1265 * Sleep, either by using msleep() or if we are suspending, then
1266 * use mdelay() to sleep.
1268 static void dm9000_msleep(board_info_t *db, unsigned int ms)
1277 * Read a word from phyxcer
1280 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1282 board_info_t *db = (board_info_t *) dev->priv;
1283 unsigned long flags;
1284 unsigned int reg_save;
1287 mutex_lock(&db->addr_lock);
1289 spin_lock_irqsave(&db->lock,flags);
1291 /* Save previous register address */
1292 reg_save = readb(db->io_addr);
1294 /* Fill the phyxcer register into REG_0C */
1295 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1297 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1299 writeb(reg_save, db->io_addr);
1300 spin_unlock_irqrestore(&db->lock,flags);
1302 dm9000_msleep(db, 1); /* Wait read complete */
1304 spin_lock_irqsave(&db->lock,flags);
1305 reg_save = readb(db->io_addr);
1307 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1309 /* The read data keeps on REG_0D & REG_0E */
1310 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1312 /* restore the previous address */
1313 writeb(reg_save, db->io_addr);
1314 spin_unlock_irqrestore(&db->lock,flags);
1316 mutex_unlock(&db->addr_lock);
1318 dm9000_dbg(db, 5, "phy_read[%02x] -> %04x\n", reg, ret);
1323 * Write a word to phyxcer
1326 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1328 board_info_t *db = (board_info_t *) dev->priv;
1329 unsigned long flags;
1330 unsigned long reg_save;
1332 dm9000_dbg(db, 5, "phy_write[%02x] = %04x\n", reg, value);
1333 mutex_lock(&db->addr_lock);
1335 spin_lock_irqsave(&db->lock,flags);
1337 /* Save previous register address */
1338 reg_save = readb(db->io_addr);
1340 /* Fill the phyxcer register into REG_0C */
1341 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1343 /* Fill the written data into REG_0D & REG_0E */
1344 iow(db, DM9000_EPDRL, value);
1345 iow(db, DM9000_EPDRH, value >> 8);
1347 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1349 writeb(reg_save, db->io_addr);
1350 spin_unlock_irqrestore(&db->lock, flags);
1352 dm9000_msleep(db, 1); /* Wait write complete */
1354 spin_lock_irqsave(&db->lock,flags);
1355 reg_save = readb(db->io_addr);
1357 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1359 /* restore the previous address */
1360 writeb(reg_save, db->io_addr);
1362 spin_unlock_irqrestore(&db->lock, flags);
1363 mutex_unlock(&db->addr_lock);
1367 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1369 struct net_device *ndev = platform_get_drvdata(dev);
1373 db = (board_info_t *) ndev->priv;
1376 if (netif_running(ndev)) {
1377 netif_device_detach(ndev);
1378 dm9000_shutdown(ndev);
1385 dm9000_drv_resume(struct platform_device *dev)
1387 struct net_device *ndev = platform_get_drvdata(dev);
1388 board_info_t *db = (board_info_t *) ndev->priv;
1392 if (netif_running(ndev)) {
1394 dm9000_init_dm9000(ndev);
1396 netif_device_attach(ndev);
1404 static int __devexit
1405 dm9000_drv_remove(struct platform_device *pdev)
1407 struct net_device *ndev = platform_get_drvdata(pdev);
1409 platform_set_drvdata(pdev, NULL);
1411 unregister_netdev(ndev);
1412 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1413 free_netdev(ndev); /* free device structure */
1415 dev_dbg(&pdev->dev, "released and freed device\n");
1419 static struct platform_driver dm9000_driver = {
1422 .owner = THIS_MODULE,
1424 .probe = dm9000_probe,
1425 .remove = __devexit_p(dm9000_drv_remove),
1426 .suspend = dm9000_drv_suspend,
1427 .resume = dm9000_drv_resume,
1433 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
1435 return platform_driver_register(&dm9000_driver); /* search board and register */
1439 dm9000_cleanup(void)
1441 platform_driver_unregister(&dm9000_driver);
1444 module_init(dm9000_init);
1445 module_exit(dm9000_cleanup);
1447 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1448 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1449 MODULE_LICENSE("GPL");
1450 MODULE_ALIAS("platform:dm9000");