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 /* DM9000 register address locking.
107 * The DM9000 uses an address register to control where data written
108 * to the data register goes. This means that the address register
109 * must be preserved over interrupts or similar calls.
111 * During interrupt and other critical calls, a spinlock is used to
112 * protect the system, but the calls themselves save the address
113 * in the address register in case they are interrupting another
114 * access to the device.
116 * For general accesses a lock is provided so that calls which are
117 * allowed to sleep are serialised so that the address register does
118 * not need to be saved. This lock also serves to serialise access
119 * to the EEPROM and PHY access registers which are shared between
123 /* Structure/enum declaration ------------------------------- */
124 typedef struct board_info {
126 void __iomem *io_addr; /* Register I/O base address */
127 void __iomem *io_data; /* Data I/O address */
132 u16 queue_start_addr;
134 u8 io_mode; /* 0:word, 2:byte */
137 unsigned int in_suspend :1;
141 void (*inblk)(void __iomem *port, void *data, int length);
142 void (*outblk)(void __iomem *port, void *data, int length);
143 void (*dumpblk)(void __iomem *port, int length);
145 struct device *dev; /* parent device */
147 struct resource *addr_res; /* resources found */
148 struct resource *data_res;
149 struct resource *addr_req; /* resources requested */
150 struct resource *data_req;
151 struct resource *irq_res;
153 struct mutex addr_lock; /* phy and eeprom access lock */
157 struct mii_if_info mii;
163 #define dm9000_dbg(db, lev, msg...) do { \
164 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
165 (lev) < db->debug_level) { \
166 dev_dbg(db->dev, msg); \
170 static inline board_info_t *to_dm9000_board(struct net_device *dev)
175 /* function declaration ------------------------------------- */
176 static int dm9000_probe(struct platform_device *);
177 static int dm9000_open(struct net_device *);
178 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
179 static int dm9000_stop(struct net_device *);
181 static void dm9000_init_dm9000(struct net_device *);
183 static irqreturn_t dm9000_interrupt(int, void *);
185 static int dm9000_phy_read(struct net_device *dev, int phyaddr_unsused, int reg);
186 static void dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg,
189 static void dm9000_read_eeprom(board_info_t *, int addr, u8 *to);
190 static void dm9000_write_eeprom(board_info_t *, int addr, u8 *dp);
191 static void dm9000_rx(struct net_device *);
192 static void dm9000_hash_table(struct net_device *);
194 //#define DM9000_PROGRAM_EEPROM
195 #ifdef DM9000_PROGRAM_EEPROM
196 static void program_eeprom(board_info_t * db);
198 /* DM9000 network board routine ---------------------------- */
201 dm9000_reset(board_info_t * db)
203 dev_dbg(db->dev, "resetting device\n");
206 writeb(DM9000_NCR, db->io_addr);
208 writeb(NCR_RST, db->io_data);
213 * Read a byte from I/O port
216 ior(board_info_t * db, int reg)
218 writeb(reg, db->io_addr);
219 return readb(db->io_data);
223 * Write a byte to I/O port
227 iow(board_info_t * db, int reg, int value)
229 writeb(reg, db->io_addr);
230 writeb(value, db->io_data);
233 /* routines for sending block to chip */
235 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
237 writesb(reg, data, count);
240 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
242 writesw(reg, data, (count+1) >> 1);
245 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
247 writesl(reg, data, (count+3) >> 2);
250 /* input block from chip to memory */
252 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
254 readsb(reg, data, count);
258 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
260 readsw(reg, data, (count+1) >> 1);
263 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
265 readsl(reg, data, (count+3) >> 2);
268 /* dump block from chip to null */
270 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
275 for (i = 0; i < count; i++)
279 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
284 count = (count + 1) >> 1;
286 for (i = 0; i < count; i++)
290 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
295 count = (count + 3) >> 2;
297 for (i = 0; i < count; i++)
303 * select the specified set of io routines to use with the
307 static void dm9000_set_io(struct board_info *db, int byte_width)
309 /* use the size of the data resource to work out what IO
310 * routines we want to use
313 switch (byte_width) {
315 db->dumpblk = dm9000_dumpblk_8bit;
316 db->outblk = dm9000_outblk_8bit;
317 db->inblk = dm9000_inblk_8bit;
322 dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
324 db->dumpblk = dm9000_dumpblk_16bit;
325 db->outblk = dm9000_outblk_16bit;
326 db->inblk = dm9000_inblk_16bit;
331 db->dumpblk = dm9000_dumpblk_32bit;
332 db->outblk = dm9000_outblk_32bit;
333 db->inblk = dm9000_inblk_32bit;
339 /* Our watchdog timed out. Called by the networking layer */
340 static void dm9000_timeout(struct net_device *dev)
342 board_info_t *db = (board_info_t *) dev->priv;
346 /* Save previous register address */
347 reg_save = readb(db->io_addr);
348 spin_lock_irqsave(&db->lock,flags);
350 netif_stop_queue(dev);
352 dm9000_init_dm9000(dev);
353 /* We can accept TX packets again */
354 dev->trans_start = jiffies;
355 netif_wake_queue(dev);
357 /* Restore previous register address */
358 writeb(reg_save, db->io_addr);
359 spin_unlock_irqrestore(&db->lock,flags);
362 #ifdef CONFIG_NET_POLL_CONTROLLER
366 static void dm9000_poll_controller(struct net_device *dev)
368 disable_irq(dev->irq);
369 dm9000_interrupt(dev->irq,dev);
370 enable_irq(dev->irq);
376 static void dm9000_get_drvinfo(struct net_device *dev,
377 struct ethtool_drvinfo *info)
379 board_info_t *dm = to_dm9000_board(dev);
381 strcpy(info->driver, CARDNAME);
382 strcpy(info->version, DRV_VERSION);
383 strcpy(info->bus_info, to_platform_device(dm->dev)->name);
386 static int dm9000_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
388 board_info_t *dm = to_dm9000_board(dev);
390 mii_ethtool_gset(&dm->mii, cmd);
394 static int dm9000_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
396 board_info_t *dm = to_dm9000_board(dev);
398 return mii_ethtool_sset(&dm->mii, cmd);
401 static int dm9000_nway_reset(struct net_device *dev)
403 board_info_t *dm = to_dm9000_board(dev);
404 return mii_nway_restart(&dm->mii);
407 static u32 dm9000_get_link(struct net_device *dev)
409 board_info_t *dm = to_dm9000_board(dev);
410 return mii_link_ok(&dm->mii);
413 #define DM_EEPROM_MAGIC (0x444D394B)
415 static int dm9000_get_eeprom_len(struct net_device *dev)
420 static int dm9000_get_eeprom(struct net_device *dev,
421 struct ethtool_eeprom *ee, u8 *data)
423 board_info_t *dm = to_dm9000_board(dev);
424 int offset = ee->offset;
428 /* EEPROM access is aligned to two bytes */
430 if ((len & 1) != 0 || (offset & 1) != 0)
433 ee->magic = DM_EEPROM_MAGIC;
435 for (i = 0; i < len; i += 2)
436 dm9000_read_eeprom(dm, (offset + i) / 2, data + i);
441 static int dm9000_set_eeprom(struct net_device *dev,
442 struct ethtool_eeprom *ee, u8 *data)
444 board_info_t *dm = to_dm9000_board(dev);
445 int offset = ee->offset;
449 /* EEPROM access is aligned to two bytes */
451 if ((len & 1) != 0 || (offset & 1) != 0)
454 if (ee->magic != DM_EEPROM_MAGIC)
457 for (i = 0; i < len; i += 2)
458 dm9000_write_eeprom(dm, (offset + i) / 2, data + i);
463 static const struct ethtool_ops dm9000_ethtool_ops = {
464 .get_drvinfo = dm9000_get_drvinfo,
465 .get_settings = dm9000_get_settings,
466 .set_settings = dm9000_set_settings,
467 .nway_reset = dm9000_nway_reset,
468 .get_link = dm9000_get_link,
469 .get_eeprom_len = dm9000_get_eeprom_len,
470 .get_eeprom = dm9000_get_eeprom,
471 .set_eeprom = dm9000_set_eeprom,
475 /* dm9000_release_board
477 * release a board, and any mapped resources
481 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
483 if (db->data_res == NULL) {
484 if (db->addr_res != NULL)
485 release_mem_region((unsigned long)db->io_addr, 4);
489 /* unmap our resources */
491 iounmap(db->io_addr);
492 iounmap(db->io_data);
494 /* release the resources */
496 if (db->data_req != NULL) {
497 release_resource(db->data_req);
501 if (db->addr_req != NULL) {
502 release_resource(db->addr_req);
507 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
510 * Search DM9000 board, allocate space and register it
513 dm9000_probe(struct platform_device *pdev)
515 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
516 struct board_info *db; /* Point a board information structure */
517 struct net_device *ndev;
524 /* Init network device */
525 ndev = alloc_etherdev(sizeof (struct board_info));
527 dev_err(&pdev->dev, "could not allocate device.\n");
531 SET_NETDEV_DEV(ndev, &pdev->dev);
533 dev_dbg(&pdev->dev, "dm9000_probe()");
535 /* setup board info structure */
536 db = (struct board_info *) ndev->priv;
537 memset(db, 0, sizeof (*db));
539 db->dev = &pdev->dev;
541 spin_lock_init(&db->lock);
542 mutex_init(&db->addr_lock);
544 if (pdev->num_resources < 2) {
547 } else if (pdev->num_resources == 2) {
548 base = pdev->resource[0].start;
550 if (!request_mem_region(base, 4, ndev->name)) {
555 ndev->base_addr = base;
556 ndev->irq = pdev->resource[1].start;
557 db->io_addr = (void __iomem *)base;
558 db->io_data = (void __iomem *)(base + 4);
560 /* ensure at least we have a default set of IO routines */
561 dm9000_set_io(db, 2);
564 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
565 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
566 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
568 if (db->addr_res == NULL || db->data_res == NULL ||
569 db->irq_res == NULL) {
570 dev_err(db->dev, "insufficient resources\n");
575 i = res_size(db->addr_res);
576 db->addr_req = request_mem_region(db->addr_res->start, i,
579 if (db->addr_req == NULL) {
580 dev_err(db->dev, "cannot claim address reg area\n");
585 db->io_addr = ioremap(db->addr_res->start, i);
587 if (db->io_addr == NULL) {
588 dev_err(db->dev, "failed to ioremap address reg\n");
593 iosize = res_size(db->data_res);
594 db->data_req = request_mem_region(db->data_res->start, iosize,
597 if (db->data_req == NULL) {
598 dev_err(db->dev, "cannot claim data reg area\n");
603 db->io_data = ioremap(db->data_res->start, iosize);
605 if (db->io_data == NULL) {
606 dev_err(db->dev,"failed to ioremap data reg\n");
611 /* fill in parameters for net-dev structure */
613 ndev->base_addr = (unsigned long)db->io_addr;
614 ndev->irq = db->irq_res->start;
616 /* ensure at least we have a default set of IO routines */
617 dm9000_set_io(db, iosize);
620 /* check to see if anything is being over-ridden */
622 /* check to see if the driver wants to over-ride the
623 * default IO width */
625 if (pdata->flags & DM9000_PLATF_8BITONLY)
626 dm9000_set_io(db, 1);
628 if (pdata->flags & DM9000_PLATF_16BITONLY)
629 dm9000_set_io(db, 2);
631 if (pdata->flags & DM9000_PLATF_32BITONLY)
632 dm9000_set_io(db, 4);
634 /* check to see if there are any IO routine
637 if (pdata->inblk != NULL)
638 db->inblk = pdata->inblk;
640 if (pdata->outblk != NULL)
641 db->outblk = pdata->outblk;
643 if (pdata->dumpblk != NULL)
644 db->dumpblk = pdata->dumpblk;
646 db->flags = pdata->flags;
651 /* try two times, DM9000 sometimes gets the first read wrong */
652 for (i = 0; i < 2; i++) {
653 id_val = ior(db, DM9000_VIDL);
654 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
655 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
656 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
658 if (id_val == DM9000_ID)
660 dev_err(db->dev, "read wrong id 0x%08x\n", id_val);
663 if (id_val != DM9000_ID) {
664 dev_err(db->dev, "wrong id: 0x%08x\n", id_val);
669 /* from this point we assume that we have found a DM9000 */
671 /* driver system function */
674 ndev->open = &dm9000_open;
675 ndev->hard_start_xmit = &dm9000_start_xmit;
676 ndev->tx_timeout = &dm9000_timeout;
677 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
678 ndev->stop = &dm9000_stop;
679 ndev->set_multicast_list = &dm9000_hash_table;
680 ndev->ethtool_ops = &dm9000_ethtool_ops;
682 #ifdef CONFIG_NET_POLL_CONTROLLER
683 ndev->poll_controller = &dm9000_poll_controller;
686 #ifdef DM9000_PROGRAM_EEPROM
689 db->msg_enable = NETIF_MSG_LINK;
690 db->mii.phy_id_mask = 0x1f;
691 db->mii.reg_num_mask = 0x1f;
692 db->mii.force_media = 0;
693 db->mii.full_duplex = 0;
695 db->mii.mdio_read = dm9000_phy_read;
696 db->mii.mdio_write = dm9000_phy_write;
698 /* try reading the node address from the attached EEPROM */
699 for (i = 0; i < 6; i += 2)
700 dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
702 if (!is_valid_ether_addr(ndev->dev_addr)) {
703 /* try reading from mac */
705 for (i = 0; i < 6; i++)
706 ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
709 if (!is_valid_ether_addr(ndev->dev_addr))
710 dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
711 "set using ifconfig\n", ndev->name);
713 platform_set_drvdata(pdev, ndev);
714 ret = register_netdev(ndev);
717 DECLARE_MAC_BUF(mac);
718 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
719 ndev->name, db->io_addr, db->io_data, ndev->irq,
720 print_mac(mac, ndev->dev_addr));
725 dev_err(db->dev, "not found (%d).\n", ret);
727 dm9000_release_board(pdev, db);
734 * Open the interface.
735 * The interface is opened whenever "ifconfig" actives it.
738 dm9000_open(struct net_device *dev)
740 board_info_t *db = (board_info_t *) dev->priv;
741 unsigned long irqflags = db->irq_res->flags & IRQF_TRIGGER_MASK;
743 dev_dbg(db->dev, "entering %s\n", __func__);
745 /* If there is no IRQ type specified, default to something that
746 * may work, and tell the user that this is a problem */
748 if (irqflags == IRQF_TRIGGER_NONE) {
749 dev_warn(db->dev, "WARNING: no IRQ resource flags set.\n");
750 irqflags = DEFAULT_TRIGGER;
753 irqflags |= IRQF_SHARED;
755 if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))
758 /* Initialize DM9000 board */
760 dm9000_init_dm9000(dev);
762 /* Init driver variable */
765 mii_check_media(&db->mii, netif_msg_link(db), 1);
766 netif_start_queue(dev);
772 * Initilize dm9000 board
775 dm9000_init_dm9000(struct net_device *dev)
777 board_info_t *db = (board_info_t *) dev->priv;
779 dm9000_dbg(db, 1, "entering %s\n", __func__);
782 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
784 /* GPIO0 on pre-activate PHY */
785 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
786 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
787 iow(db, DM9000_GPR, 0); /* Enable PHY */
789 if (db->flags & DM9000_PLATF_EXT_PHY)
790 iow(db, DM9000_NCR, NCR_EXT_PHY);
792 /* Program operating register */
793 iow(db, DM9000_TCR, 0); /* TX Polling clear */
794 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
795 iow(db, DM9000_FCR, 0xff); /* Flow Control */
796 iow(db, DM9000_SMCR, 0); /* Special Mode */
797 /* clear TX status */
798 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
799 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
801 /* Set address filter table */
802 dm9000_hash_table(dev);
804 /* Activate DM9000 */
805 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
806 /* Enable TX/RX interrupt mask */
807 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
809 /* Init Driver variable */
811 db->queue_pkt_len = 0;
812 dev->trans_start = 0;
816 * Hardware start transmission.
817 * Send a packet to media from the upper layer.
820 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
823 board_info_t *db = (board_info_t *) dev->priv;
825 dm9000_dbg(db, 3, "%s:\n", __func__);
827 if (db->tx_pkt_cnt > 1)
830 spin_lock_irqsave(&db->lock, flags);
832 /* Move data to DM9000 TX RAM */
833 writeb(DM9000_MWCMD, db->io_addr);
835 (db->outblk)(db->io_data, skb->data, skb->len);
836 dev->stats.tx_bytes += skb->len;
839 /* TX control: First packet immediately send, second packet queue */
840 if (db->tx_pkt_cnt == 1) {
841 /* Set TX length to DM9000 */
842 iow(db, DM9000_TXPLL, skb->len & 0xff);
843 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
845 /* Issue TX polling command */
846 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
848 dev->trans_start = jiffies; /* save the time stamp */
851 db->queue_pkt_len = skb->len;
852 netif_stop_queue(dev);
855 spin_unlock_irqrestore(&db->lock, flags);
864 dm9000_shutdown(struct net_device *dev)
866 board_info_t *db = (board_info_t *) dev->priv;
869 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
870 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
871 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
872 iow(db, DM9000_RCR, 0x00); /* Disable RX */
876 * Stop the interface.
877 * The interface is stopped when it is brought.
880 dm9000_stop(struct net_device *ndev)
882 board_info_t *db = (board_info_t *) ndev->priv;
884 dm9000_dbg(db, 1, "entering %s\n", __func__);
886 netif_stop_queue(ndev);
887 netif_carrier_off(ndev);
890 free_irq(ndev->irq, ndev);
892 dm9000_shutdown(ndev);
898 * DM9000 interrupt handler
899 * receive the packet to upper layer, free the transmitted packet
903 dm9000_tx_done(struct net_device *dev, board_info_t * db)
905 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
907 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
908 /* One packet sent complete */
910 dev->stats.tx_packets++;
912 /* Queue packet check & send */
913 if (db->tx_pkt_cnt > 0) {
914 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
915 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
916 iow(db, DM9000_TCR, TCR_TXREQ);
917 dev->trans_start = jiffies;
919 netif_wake_queue(dev);
924 dm9000_interrupt(int irq, void *dev_id)
926 struct net_device *dev = dev_id;
927 board_info_t *db = (board_info_t *) dev->priv;
931 dm9000_dbg(db, 3, "entering %s\n", __func__);
933 /* A real interrupt coming */
935 spin_lock(&db->lock);
937 /* Save previous register address */
938 reg_save = readb(db->io_addr);
940 /* Disable all interrupts */
941 iow(db, DM9000_IMR, IMR_PAR);
943 /* Got DM9000 interrupt status */
944 int_status = ior(db, DM9000_ISR); /* Got ISR */
945 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
947 /* Received the coming packet */
948 if (int_status & ISR_PRS)
951 /* Trnasmit Interrupt check */
952 if (int_status & ISR_PTS)
953 dm9000_tx_done(dev, db);
955 /* Re-enable interrupt mask */
956 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
958 /* Restore previous register address */
959 writeb(reg_save, db->io_addr);
961 spin_unlock(&db->lock);
966 struct dm9000_rxhdr {
970 } __attribute__((__packed__));
973 * Received a packet and pass to upper layer
976 dm9000_rx(struct net_device *dev)
978 board_info_t *db = (board_info_t *) dev->priv;
979 struct dm9000_rxhdr rxhdr;
985 /* Check packet ready or not */
987 ior(db, DM9000_MRCMDX); /* Dummy read */
989 /* Get most updated data */
990 rxbyte = readb(db->io_data);
992 /* Status check: this byte must be 0 or 1 */
993 if (rxbyte > DM9000_PKT_RDY) {
994 dev_warn(db->dev, "status check fail: %d\n", rxbyte);
995 iow(db, DM9000_RCR, 0x00); /* Stop Device */
996 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
1000 if (rxbyte != DM9000_PKT_RDY)
1003 /* A packet ready now & Get status/length */
1005 writeb(DM9000_MRCMD, db->io_addr);
1007 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
1009 RxLen = le16_to_cpu(rxhdr.RxLen);
1011 /* Packet Status check */
1014 dev_dbg(db->dev, "Bad Packet received (runt)\n");
1017 if (RxLen > DM9000_PKT_MAX) {
1018 dev_dbg(db->dev, "RST: RX Len:%x\n", RxLen);
1021 if (rxhdr.RxStatus & 0xbf) {
1023 if (rxhdr.RxStatus & 0x01) {
1024 dev_dbg(db->dev, "fifo error\n");
1025 dev->stats.rx_fifo_errors++;
1027 if (rxhdr.RxStatus & 0x02) {
1028 dev_dbg(db->dev, "crc error\n");
1029 dev->stats.rx_crc_errors++;
1031 if (rxhdr.RxStatus & 0x80) {
1032 dev_dbg(db->dev, "length error\n");
1033 dev->stats.rx_length_errors++;
1037 /* Move data from DM9000 */
1039 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
1040 skb_reserve(skb, 2);
1041 rdptr = (u8 *) skb_put(skb, RxLen - 4);
1043 /* Read received packet from RX SRAM */
1045 (db->inblk)(db->io_data, rdptr, RxLen);
1046 dev->stats.rx_bytes += RxLen;
1048 /* Pass to upper layer */
1049 skb->protocol = eth_type_trans(skb, dev);
1051 dev->stats.rx_packets++;
1054 /* need to dump the packet's data */
1056 (db->dumpblk)(db->io_data, RxLen);
1058 } while (rxbyte == DM9000_PKT_RDY);
1062 * Read a word data from EEPROM
1065 dm9000_read_eeprom(board_info_t *db, int offset, u8 *to)
1067 mutex_lock(&db->addr_lock);
1069 iow(db, DM9000_EPAR, offset);
1070 iow(db, DM9000_EPCR, EPCR_ERPRR);
1071 mdelay(8); /* according to the datasheet 200us should be enough,
1072 but it doesn't work */
1073 iow(db, DM9000_EPCR, 0x0);
1075 to[0] = ior(db, DM9000_EPDRL);
1076 to[1] = ior(db, DM9000_EPDRH);
1078 mutex_unlock(&db->addr_lock);
1082 * Write a word data to SROM
1085 dm9000_write_eeprom(board_info_t *db, int offset, u8 *data)
1087 mutex_lock(&db->addr_lock);
1089 iow(db, DM9000_EPAR, offset);
1090 iow(db, DM9000_EPDRH, data[1]);
1091 iow(db, DM9000_EPDRL, data[0]);
1092 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
1093 mdelay(8); /* same shit */
1094 iow(db, DM9000_EPCR, 0);
1096 mutex_unlock(&db->addr_lock);
1099 #ifdef DM9000_PROGRAM_EEPROM
1101 * Only for development:
1102 * Here we write static data to the eeprom in case
1103 * we don't have valid content on a new board
1106 program_eeprom(board_info_t * db)
1108 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1109 0x0000, /* Autoload: accept nothing */
1110 0x0a46, 0x9000, /* Vendor / Product ID */
1111 0x0000, /* pin control */
1113 }; /* Wake-up mode control */
1115 for (i = 0; i < 8; i++)
1116 write_srom_word(db, i, eeprom[i]);
1122 * Calculate the CRC valude of the Rx packet
1123 * flag = 1 : return the reverse CRC (for the received packet CRC)
1124 * 0 : return the normal CRC (for Hash Table index)
1127 static unsigned long
1128 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1131 u32 crc = ether_crc_le(Len, Data);
1140 * Set DM9000 multicast address
1143 dm9000_hash_table(struct net_device *dev)
1145 board_info_t *db = (board_info_t *) dev->priv;
1146 struct dev_mc_list *mcptr = dev->mc_list;
1147 int mc_cnt = dev->mc_count;
1149 u16 i, oft, hash_table[4];
1150 unsigned long flags;
1152 dm9000_dbg(db, 1, "entering %s\n", __func__);
1154 spin_lock_irqsave(&db->lock,flags);
1156 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1157 iow(db, oft, dev->dev_addr[i]);
1159 /* Clear Hash Table */
1160 for (i = 0; i < 4; i++)
1161 hash_table[i] = 0x0;
1163 /* broadcast address */
1164 hash_table[3] = 0x8000;
1166 /* the multicast address in Hash Table : 64 bits */
1167 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1168 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1169 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1172 /* Write the hash table to MAC MD table */
1173 for (i = 0, oft = 0x16; i < 4; i++) {
1174 iow(db, oft++, hash_table[i] & 0xff);
1175 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1178 spin_unlock_irqrestore(&db->lock,flags);
1183 * Sleep, either by using msleep() or if we are suspending, then
1184 * use mdelay() to sleep.
1186 static void dm9000_msleep(board_info_t *db, unsigned int ms)
1195 * Read a word from phyxcer
1198 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1200 board_info_t *db = (board_info_t *) dev->priv;
1201 unsigned long flags;
1202 unsigned int reg_save;
1205 mutex_lock(&db->addr_lock);
1207 spin_lock_irqsave(&db->lock,flags);
1209 /* Save previous register address */
1210 reg_save = readb(db->io_addr);
1212 /* Fill the phyxcer register into REG_0C */
1213 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1215 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1217 writeb(reg_save, db->io_addr);
1218 spin_unlock_irqrestore(&db->lock,flags);
1220 dm9000_msleep(db, 1); /* Wait read complete */
1222 spin_lock_irqsave(&db->lock,flags);
1223 reg_save = readb(db->io_addr);
1225 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1227 /* The read data keeps on REG_0D & REG_0E */
1228 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1230 /* restore the previous address */
1231 writeb(reg_save, db->io_addr);
1232 spin_unlock_irqrestore(&db->lock,flags);
1234 mutex_unlock(&db->addr_lock);
1239 * Write a word to phyxcer
1242 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1244 board_info_t *db = (board_info_t *) dev->priv;
1245 unsigned long flags;
1246 unsigned long reg_save;
1248 mutex_lock(&db->addr_lock);
1250 spin_lock_irqsave(&db->lock,flags);
1252 /* Save previous register address */
1253 reg_save = readb(db->io_addr);
1255 /* Fill the phyxcer register into REG_0C */
1256 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1258 /* Fill the written data into REG_0D & REG_0E */
1259 iow(db, DM9000_EPDRL, (value & 0xff));
1260 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1262 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1264 writeb(reg_save, db->io_addr);
1265 spin_unlock_irqrestore(&db->lock, flags);
1267 dm9000_msleep(db, 1); /* Wait write complete */
1269 spin_lock_irqsave(&db->lock,flags);
1270 reg_save = readb(db->io_addr);
1272 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1274 /* restore the previous address */
1275 writeb(reg_save, db->io_addr);
1277 spin_unlock_irqrestore(&db->lock, flags);
1278 mutex_unlock(&db->addr_lock);
1282 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1284 struct net_device *ndev = platform_get_drvdata(dev);
1288 db = (board_info_t *) ndev->priv;
1291 if (netif_running(ndev)) {
1292 netif_device_detach(ndev);
1293 dm9000_shutdown(ndev);
1300 dm9000_drv_resume(struct platform_device *dev)
1302 struct net_device *ndev = platform_get_drvdata(dev);
1303 board_info_t *db = (board_info_t *) ndev->priv;
1307 if (netif_running(ndev)) {
1309 dm9000_init_dm9000(ndev);
1311 netif_device_attach(ndev);
1320 dm9000_drv_remove(struct platform_device *pdev)
1322 struct net_device *ndev = platform_get_drvdata(pdev);
1324 platform_set_drvdata(pdev, NULL);
1326 unregister_netdev(ndev);
1327 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1328 free_netdev(ndev); /* free device structure */
1330 dev_dbg(&pdev->dev, "released and freed device\n");
1334 static struct platform_driver dm9000_driver = {
1337 .owner = THIS_MODULE,
1339 .probe = dm9000_probe,
1340 .remove = dm9000_drv_remove,
1341 .suspend = dm9000_drv_suspend,
1342 .resume = dm9000_drv_resume,
1348 printk(KERN_INFO "%s Ethernet Driver, V%s\n", CARDNAME, DRV_VERSION);
1350 return platform_driver_register(&dm9000_driver); /* search board and register */
1354 dm9000_cleanup(void)
1356 platform_driver_unregister(&dm9000_driver);
1359 module_init(dm9000_init);
1360 module_exit(dm9000_cleanup);
1362 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1363 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1364 MODULE_LICENSE("GPL");