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/version.h>
64 #include <linux/spinlock.h>
65 #include <linux/crc32.h>
66 #include <linux/mii.h>
67 #include <linux/dm9000.h>
68 #include <linux/delay.h>
69 #include <linux/platform_device.h>
71 #include <asm/delay.h>
77 /* Board/System/Debug information/definition ---------------- */
79 #define DM9000_PHY 0x40 /* PHY address 0x01 */
84 #define CARDNAME "dm9000"
85 #define PFX CARDNAME ": "
87 #define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
89 #define DM9000_DEBUG 0
92 #define PRINTK3(args...) printk(CARDNAME ": " args)
94 #define PRINTK3(args...) do { } while(0)
98 #define PRINTK2(args...) printk(CARDNAME ": " args)
100 #define PRINTK2(args...) do { } while(0)
104 #define PRINTK1(args...) printk(CARDNAME ": " args)
105 #define PRINTK(args...) printk(CARDNAME ": " args)
107 #define PRINTK1(args...) do { } while(0)
108 #define PRINTK(args...) printk(KERN_DEBUG args)
112 * Transmit timeout, default 5 seconds.
114 static int watchdog = 5000;
115 module_param(watchdog, int, 0400);
116 MODULE_PARM_DESC(watchdog, "transmit timeout in milliseconds");
118 /* Structure/enum declaration ------------------------------- */
119 typedef struct board_info {
121 void __iomem *io_addr; /* Register I/O base address */
122 void __iomem *io_data; /* Data I/O address */
127 u16 queue_start_addr;
129 u8 io_mode; /* 0:word, 2:byte */
132 void (*inblk)(void __iomem *port, void *data, int length);
133 void (*outblk)(void __iomem *port, void *data, int length);
134 void (*dumpblk)(void __iomem *port, int length);
136 struct resource *addr_res; /* resources found */
137 struct resource *data_res;
138 struct resource *addr_req; /* resources requested */
139 struct resource *data_req;
140 struct resource *irq_res;
142 struct timer_list timer;
143 struct net_device_stats stats;
144 unsigned char srom[128];
147 struct mii_if_info mii;
151 /* function declaration ------------------------------------- */
152 static int dm9000_probe(struct platform_device *);
153 static int dm9000_open(struct net_device *);
154 static int dm9000_start_xmit(struct sk_buff *, struct net_device *);
155 static int dm9000_stop(struct net_device *);
158 static void dm9000_timer(unsigned long);
159 static void dm9000_init_dm9000(struct net_device *);
161 static struct net_device_stats *dm9000_get_stats(struct net_device *);
163 static irqreturn_t dm9000_interrupt(int, void *, struct pt_regs *);
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 PRINTK1("dm9000x: resetting\n");
183 writeb(DM9000_NCR, db->io_addr);
185 writeb(NCR_RST, db->io_data);
190 * Read a byte from I/O port
193 ior(board_info_t * db, int reg)
195 writeb(reg, db->io_addr);
196 return readb(db->io_data);
200 * Write a byte to I/O port
204 iow(board_info_t * db, int reg, int value)
206 writeb(reg, db->io_addr);
207 writeb(value, db->io_data);
210 /* routines for sending block to chip */
212 static void dm9000_outblk_8bit(void __iomem *reg, void *data, int count)
214 writesb(reg, data, count);
217 static void dm9000_outblk_16bit(void __iomem *reg, void *data, int count)
219 writesw(reg, data, (count+1) >> 1);
222 static void dm9000_outblk_32bit(void __iomem *reg, void *data, int count)
224 writesl(reg, data, (count+3) >> 2);
227 /* input block from chip to memory */
229 static void dm9000_inblk_8bit(void __iomem *reg, void *data, int count)
231 readsb(reg, data, count);
235 static void dm9000_inblk_16bit(void __iomem *reg, void *data, int count)
237 readsw(reg, data, (count+1) >> 1);
240 static void dm9000_inblk_32bit(void __iomem *reg, void *data, int count)
242 readsl(reg, data, (count+3) >> 2);
245 /* dump block from chip to null */
247 static void dm9000_dumpblk_8bit(void __iomem *reg, int count)
252 for (i = 0; i < count; i++)
256 static void dm9000_dumpblk_16bit(void __iomem *reg, int count)
261 count = (count + 1) >> 1;
263 for (i = 0; i < count; i++)
267 static void dm9000_dumpblk_32bit(void __iomem *reg, int count)
272 count = (count + 3) >> 2;
274 for (i = 0; i < count; i++)
280 * select the specified set of io routines to use with the
284 static void dm9000_set_io(struct board_info *db, int byte_width)
286 /* use the size of the data resource to work out what IO
287 * routines we want to use
290 switch (byte_width) {
292 db->dumpblk = dm9000_dumpblk_8bit;
293 db->outblk = dm9000_outblk_8bit;
294 db->inblk = dm9000_inblk_8bit;
298 db->dumpblk = dm9000_dumpblk_16bit;
299 db->outblk = dm9000_outblk_16bit;
300 db->inblk = dm9000_inblk_16bit;
304 printk(KERN_ERR PFX ": 3 byte IO, falling back to 16bit\n");
305 db->dumpblk = dm9000_dumpblk_16bit;
306 db->outblk = dm9000_outblk_16bit;
307 db->inblk = dm9000_inblk_16bit;
312 db->dumpblk = dm9000_dumpblk_32bit;
313 db->outblk = dm9000_outblk_32bit;
314 db->inblk = dm9000_inblk_32bit;
320 /* Our watchdog timed out. Called by the networking layer */
321 static void dm9000_timeout(struct net_device *dev)
323 board_info_t *db = (board_info_t *) dev->priv;
327 /* Save previous register address */
328 reg_save = readb(db->io_addr);
329 spin_lock_irqsave(&db->lock,flags);
331 netif_stop_queue(dev);
333 dm9000_init_dm9000(dev);
334 /* We can accept TX packets again */
335 dev->trans_start = jiffies;
336 netif_wake_queue(dev);
338 /* Restore previous register address */
339 writeb(reg_save, db->io_addr);
340 spin_unlock_irqrestore(&db->lock,flags);
344 /* dm9000_release_board
346 * release a board, and any mapped resources
350 dm9000_release_board(struct platform_device *pdev, struct board_info *db)
352 if (db->data_res == NULL) {
353 if (db->addr_res != NULL)
354 release_mem_region((unsigned long)db->io_addr, 4);
358 /* unmap our resources */
360 iounmap(db->io_addr);
361 iounmap(db->io_data);
363 /* release the resources */
365 if (db->data_req != NULL) {
366 release_resource(db->data_req);
370 if (db->addr_res != NULL) {
371 release_resource(db->addr_res);
376 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
379 * Search DM9000 board, allocate space and register it
382 dm9000_probe(struct platform_device *pdev)
384 struct dm9000_plat_data *pdata = pdev->dev.platform_data;
385 struct board_info *db; /* Point a board information structure */
386 struct net_device *ndev;
393 /* Init network device */
394 ndev = alloc_etherdev(sizeof (struct board_info));
396 printk("%s: could not allocate device.\n", CARDNAME);
400 SET_MODULE_OWNER(ndev);
401 SET_NETDEV_DEV(ndev, &pdev->dev);
403 PRINTK2("dm9000_probe()");
405 /* setup board info structure */
406 db = (struct board_info *) ndev->priv;
407 memset(db, 0, sizeof (*db));
409 spin_lock_init(&db->lock);
411 if (pdev->num_resources < 2) {
416 switch (pdev->num_resources) {
418 base = pdev->resource[0].start;
420 if (!request_mem_region(base, 4, ndev->name)) {
425 ndev->base_addr = base;
426 ndev->irq = pdev->resource[1].start;
427 db->io_addr = (void *)base;
428 db->io_data = (void *)(base + 4);
433 db->addr_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
434 db->data_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
435 db->irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
437 if (db->addr_res == NULL || db->data_res == NULL) {
438 printk(KERN_ERR PFX "insufficient resources\n");
443 i = res_size(db->addr_res);
444 db->addr_req = request_mem_region(db->addr_res->start, i,
447 if (db->addr_req == NULL) {
448 printk(KERN_ERR PFX "cannot claim address reg area\n");
453 db->io_addr = ioremap(db->addr_res->start, i);
455 if (db->io_addr == NULL) {
456 printk(KERN_ERR "failed to ioremap address reg\n");
461 iosize = res_size(db->data_res);
462 db->data_req = request_mem_region(db->data_res->start, iosize,
465 if (db->data_req == NULL) {
466 printk(KERN_ERR PFX "cannot claim data reg area\n");
471 db->io_data = ioremap(db->data_res->start, iosize);
473 if (db->io_data == NULL) {
474 printk(KERN_ERR "failed to ioremap data reg\n");
479 /* fill in parameters for net-dev structure */
481 ndev->base_addr = (unsigned long)db->io_addr;
482 ndev->irq = db->irq_res->start;
484 /* ensure at least we have a default set of IO routines */
485 dm9000_set_io(db, iosize);
489 /* check to see if anything is being over-ridden */
491 /* check to see if the driver wants to over-ride the
492 * default IO width */
494 if (pdata->flags & DM9000_PLATF_8BITONLY)
495 dm9000_set_io(db, 1);
497 if (pdata->flags & DM9000_PLATF_16BITONLY)
498 dm9000_set_io(db, 2);
500 if (pdata->flags & DM9000_PLATF_32BITONLY)
501 dm9000_set_io(db, 4);
503 /* check to see if there are any IO routine
506 if (pdata->inblk != NULL)
507 db->inblk = pdata->inblk;
509 if (pdata->outblk != NULL)
510 db->outblk = pdata->outblk;
512 if (pdata->dumpblk != NULL)
513 db->dumpblk = pdata->dumpblk;
518 /* try two times, DM9000 sometimes gets the first read wrong */
519 for (i = 0; i < 2; i++) {
520 id_val = ior(db, DM9000_VIDL);
521 id_val |= (u32)ior(db, DM9000_VIDH) << 8;
522 id_val |= (u32)ior(db, DM9000_PIDL) << 16;
523 id_val |= (u32)ior(db, DM9000_PIDH) << 24;
525 if (id_val == DM9000_ID)
527 printk("%s: read wrong id 0x%08x\n", CARDNAME, id_val);
530 if (id_val != DM9000_ID) {
531 printk("%s: wrong id: 0x%08x\n", CARDNAME, id_val);
535 /* from this point we assume that we have found a DM9000 */
537 /* driver system function */
540 ndev->open = &dm9000_open;
541 ndev->hard_start_xmit = &dm9000_start_xmit;
542 ndev->tx_timeout = &dm9000_timeout;
543 ndev->watchdog_timeo = msecs_to_jiffies(watchdog);
544 ndev->stop = &dm9000_stop;
545 ndev->get_stats = &dm9000_get_stats;
546 ndev->set_multicast_list = &dm9000_hash_table;
548 #ifdef DM9000_PROGRAM_EEPROM
551 db->msg_enable = NETIF_MSG_LINK;
552 db->mii.phy_id_mask = 0x1f;
553 db->mii.reg_num_mask = 0x1f;
554 db->mii.force_media = 0;
555 db->mii.full_duplex = 0;
557 db->mii.mdio_read = dm9000_phy_read;
558 db->mii.mdio_write = dm9000_phy_write;
560 /* Read SROM content */
561 for (i = 0; i < 64; i++)
562 ((u16 *) db->srom)[i] = read_srom_word(db, i);
564 /* Set Node Address */
565 for (i = 0; i < 6; i++)
566 ndev->dev_addr[i] = db->srom[i];
568 if (!is_valid_ether_addr(ndev->dev_addr))
569 printk("%s: Invalid ethernet MAC address. Please "
570 "set using ifconfig\n", ndev->name);
572 platform_set_drvdata(pdev, ndev);
573 ret = register_netdev(ndev);
576 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
577 ndev->name, db->io_addr, db->io_data, ndev->irq);
578 for (i = 0; i < 5; i++)
579 printk("%02x:", ndev->dev_addr[i]);
580 printk("%02x\n", ndev->dev_addr[5]);
586 printk("%s: not found (%d).\n", CARDNAME, ret);
588 dm9000_release_board(pdev, db);
595 * Open the interface.
596 * The interface is opened whenever "ifconfig" actives it.
599 dm9000_open(struct net_device *dev)
601 board_info_t *db = (board_info_t *) dev->priv;
603 PRINTK2("entering dm9000_open\n");
605 if (request_irq(dev->irq, &dm9000_interrupt, SA_SHIRQ, dev->name, dev))
608 /* Initialize DM9000 board */
610 dm9000_init_dm9000(dev);
612 /* Init driver variable */
615 /* set and active a timer process */
616 init_timer(&db->timer);
617 db->timer.expires = DM9000_TIMER_WUT;
618 db->timer.data = (unsigned long) dev;
619 db->timer.function = &dm9000_timer;
620 add_timer(&db->timer);
622 mii_check_media(&db->mii, netif_msg_link(db), 1);
623 netif_start_queue(dev);
629 * Initilize dm9000 board
632 dm9000_init_dm9000(struct net_device *dev)
634 board_info_t *db = (board_info_t *) dev->priv;
636 PRINTK1("entering %s\n",__FUNCTION__);
639 db->io_mode = ior(db, DM9000_ISR) >> 6; /* ISR bit7:6 keeps I/O mode */
641 /* GPIO0 on pre-activate PHY */
642 iow(db, DM9000_GPR, 0); /* REG_1F bit0 activate phyxcer */
643 iow(db, DM9000_GPCR, GPCR_GEP_CNTL); /* Let GPIO0 output */
644 iow(db, DM9000_GPR, 0); /* Enable PHY */
646 /* Program operating register */
647 iow(db, DM9000_TCR, 0); /* TX Polling clear */
648 iow(db, DM9000_BPTR, 0x3f); /* Less 3Kb, 200us */
649 iow(db, DM9000_FCR, 0xff); /* Flow Control */
650 iow(db, DM9000_SMCR, 0); /* Special Mode */
651 /* clear TX status */
652 iow(db, DM9000_NSR, NSR_WAKEST | NSR_TX2END | NSR_TX1END);
653 iow(db, DM9000_ISR, ISR_CLR_STATUS); /* Clear interrupt status */
655 /* Set address filter table */
656 dm9000_hash_table(dev);
658 /* Activate DM9000 */
659 iow(db, DM9000_RCR, RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN);
660 /* Enable TX/RX interrupt mask */
661 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
663 /* Init Driver variable */
665 db->queue_pkt_len = 0;
666 dev->trans_start = 0;
667 spin_lock_init(&db->lock);
671 * Hardware start transmission.
672 * Send a packet to media from the upper layer.
675 dm9000_start_xmit(struct sk_buff *skb, struct net_device *dev)
677 board_info_t *db = (board_info_t *) dev->priv;
679 PRINTK3("dm9000_start_xmit\n");
681 if (db->tx_pkt_cnt > 1)
684 netif_stop_queue(dev);
686 /* Disable all interrupts */
687 iow(db, DM9000_IMR, IMR_PAR);
689 /* Move data to DM9000 TX RAM */
690 writeb(DM9000_MWCMD, db->io_addr);
692 (db->outblk)(db->io_data, skb->data, skb->len);
693 db->stats.tx_bytes += skb->len;
695 /* TX control: First packet immediately send, second packet queue */
696 if (db->tx_pkt_cnt == 0) {
701 /* Set TX length to DM9000 */
702 iow(db, DM9000_TXPLL, skb->len & 0xff);
703 iow(db, DM9000_TXPLH, (skb->len >> 8) & 0xff);
705 /* Issue TX polling command */
706 iow(db, DM9000_TCR, TCR_TXREQ); /* Cleared after TX complete */
708 dev->trans_start = jiffies; /* save the time stamp */
713 db->queue_pkt_len = skb->len;
719 /* Re-enable resource check */
720 if (db->tx_pkt_cnt == 1)
721 netif_wake_queue(dev);
723 /* Re-enable interrupt */
724 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
730 dm9000_shutdown(struct net_device *dev)
732 board_info_t *db = (board_info_t *) dev->priv;
735 dm9000_phy_write(dev, 0, MII_BMCR, BMCR_RESET); /* PHY RESET */
736 iow(db, DM9000_GPR, 0x01); /* Power-Down PHY */
737 iow(db, DM9000_IMR, IMR_PAR); /* Disable all interrupt */
738 iow(db, DM9000_RCR, 0x00); /* Disable RX */
742 * Stop the interface.
743 * The interface is stopped when it is brought.
746 dm9000_stop(struct net_device *ndev)
748 board_info_t *db = (board_info_t *) ndev->priv;
750 PRINTK1("entering %s\n",__FUNCTION__);
753 del_timer(&db->timer);
755 netif_stop_queue(ndev);
756 netif_carrier_off(ndev);
759 free_irq(ndev->irq, ndev);
761 dm9000_shutdown(ndev);
767 * DM9000 interrupt handler
768 * receive the packet to upper layer, free the transmitted packet
772 dm9000_tx_done(struct net_device *dev, board_info_t * db)
774 int tx_status = ior(db, DM9000_NSR); /* Got TX status */
776 if (tx_status & (NSR_TX2END | NSR_TX1END)) {
777 /* One packet sent complete */
779 db->stats.tx_packets++;
781 /* Queue packet check & send */
782 if (db->tx_pkt_cnt > 0) {
783 iow(db, DM9000_TXPLL, db->queue_pkt_len & 0xff);
784 iow(db, DM9000_TXPLH, (db->queue_pkt_len >> 8) & 0xff);
785 iow(db, DM9000_TCR, TCR_TXREQ);
786 dev->trans_start = jiffies;
788 netif_wake_queue(dev);
793 dm9000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
795 struct net_device *dev = dev_id;
800 PRINTK3("entering %s\n",__FUNCTION__);
803 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
807 /* A real interrupt coming */
808 db = (board_info_t *) dev->priv;
809 spin_lock(&db->lock);
811 /* Save previous register address */
812 reg_save = readb(db->io_addr);
814 /* Disable all interrupts */
815 iow(db, DM9000_IMR, IMR_PAR);
817 /* Got DM9000 interrupt status */
818 int_status = ior(db, DM9000_ISR); /* Got ISR */
819 iow(db, DM9000_ISR, int_status); /* Clear ISR status */
821 /* Received the coming packet */
822 if (int_status & ISR_PRS)
825 /* Trnasmit Interrupt check */
826 if (int_status & ISR_PTS)
827 dm9000_tx_done(dev, db);
829 /* Re-enable interrupt mask */
830 iow(db, DM9000_IMR, IMR_PAR | IMR_PTM | IMR_PRM);
832 /* Restore previous register address */
833 writeb(reg_save, db->io_addr);
835 spin_unlock(&db->lock);
841 * Get statistics from driver.
843 static struct net_device_stats *
844 dm9000_get_stats(struct net_device *dev)
846 board_info_t *db = (board_info_t *) dev->priv;
852 * A periodic timer routine
853 * Dynamic media sense, allocated Rx buffer...
856 dm9000_timer(unsigned long data)
858 struct net_device *dev = (struct net_device *) data;
859 board_info_t *db = (board_info_t *) dev->priv;
861 PRINTK3("dm9000_timer()\n");
863 mii_check_media(&db->mii, netif_msg_link(db), 0);
865 /* Set timer again */
866 db->timer.expires = DM9000_TIMER_WUT;
867 add_timer(&db->timer);
870 struct dm9000_rxhdr {
873 } __attribute__((__packed__));
876 * Received a packet and pass to upper layer
879 dm9000_rx(struct net_device *dev)
881 board_info_t *db = (board_info_t *) dev->priv;
882 struct dm9000_rxhdr rxhdr;
888 /* Check packet ready or not */
890 ior(db, DM9000_MRCMDX); /* Dummy read */
892 /* Get most updated data */
893 rxbyte = readb(db->io_data);
895 /* Status check: this byte must be 0 or 1 */
896 if (rxbyte > DM9000_PKT_RDY) {
897 printk("status check failed: %d\n", rxbyte);
898 iow(db, DM9000_RCR, 0x00); /* Stop Device */
899 iow(db, DM9000_ISR, IMR_PAR); /* Stop INT request */
903 if (rxbyte != DM9000_PKT_RDY)
906 /* A packet ready now & Get status/length */
908 writeb(DM9000_MRCMD, db->io_addr);
910 (db->inblk)(db->io_data, &rxhdr, sizeof(rxhdr));
914 /* Packet Status check */
917 PRINTK1("Bad Packet received (runt)\n");
920 if (RxLen > DM9000_PKT_MAX) {
921 PRINTK1("RST: RX Len:%x\n", RxLen);
924 if (rxhdr.RxStatus & 0xbf00) {
926 if (rxhdr.RxStatus & 0x100) {
927 PRINTK1("fifo error\n");
928 db->stats.rx_fifo_errors++;
930 if (rxhdr.RxStatus & 0x200) {
931 PRINTK1("crc error\n");
932 db->stats.rx_crc_errors++;
934 if (rxhdr.RxStatus & 0x8000) {
935 PRINTK1("length error\n");
936 db->stats.rx_length_errors++;
940 /* Move data from DM9000 */
942 && ((skb = dev_alloc_skb(RxLen + 4)) != NULL)) {
945 rdptr = (u8 *) skb_put(skb, RxLen - 4);
947 /* Read received packet from RX SRAM */
949 (db->inblk)(db->io_data, rdptr, RxLen);
950 db->stats.rx_bytes += RxLen;
952 /* Pass to upper layer */
953 skb->protocol = eth_type_trans(skb, dev);
955 db->stats.rx_packets++;
958 /* need to dump the packet's data */
960 (db->dumpblk)(db->io_data, RxLen);
962 } while (rxbyte == DM9000_PKT_RDY);
966 * Read a word data from SROM
969 read_srom_word(board_info_t * db, int offset)
971 iow(db, DM9000_EPAR, offset);
972 iow(db, DM9000_EPCR, EPCR_ERPRR);
973 mdelay(8); /* according to the datasheet 200us should be enough,
974 but it doesn't work */
975 iow(db, DM9000_EPCR, 0x0);
976 return (ior(db, DM9000_EPDRL) + (ior(db, DM9000_EPDRH) << 8));
979 #ifdef DM9000_PROGRAM_EEPROM
981 * Write a word data to SROM
984 write_srom_word(board_info_t * db, int offset, u16 val)
986 iow(db, DM9000_EPAR, offset);
987 iow(db, DM9000_EPDRH, ((val >> 8) & 0xff));
988 iow(db, DM9000_EPDRL, (val & 0xff));
989 iow(db, DM9000_EPCR, EPCR_WEP | EPCR_ERPRW);
990 mdelay(8); /* same shit */
991 iow(db, DM9000_EPCR, 0);
995 * Only for development:
996 * Here we write static data to the eeprom in case
997 * we don't have valid content on a new board
1000 program_eeprom(board_info_t * db)
1002 u16 eeprom[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1003 0x0000, /* Autoload: accept nothing */
1004 0x0a46, 0x9000, /* Vendor / Product ID */
1005 0x0000, /* pin control */
1007 }; /* Wake-up mode control */
1009 for (i = 0; i < 8; i++)
1010 write_srom_word(db, i, eeprom[i]);
1016 * Calculate the CRC valude of the Rx packet
1017 * flag = 1 : return the reverse CRC (for the received packet CRC)
1018 * 0 : return the normal CRC (for Hash Table index)
1021 static unsigned long
1022 cal_CRC(unsigned char *Data, unsigned int Len, u8 flag)
1025 u32 crc = ether_crc_le(Len, Data);
1034 * Set DM9000 multicast address
1037 dm9000_hash_table(struct net_device *dev)
1039 board_info_t *db = (board_info_t *) dev->priv;
1040 struct dev_mc_list *mcptr = dev->mc_list;
1041 int mc_cnt = dev->mc_count;
1043 u16 i, oft, hash_table[4];
1044 unsigned long flags;
1046 PRINTK2("dm9000_hash_table()\n");
1048 spin_lock_irqsave(&db->lock,flags);
1050 for (i = 0, oft = 0x10; i < 6; i++, oft++)
1051 iow(db, oft, dev->dev_addr[i]);
1053 /* Clear Hash Table */
1054 for (i = 0; i < 4; i++)
1055 hash_table[i] = 0x0;
1057 /* broadcast address */
1058 hash_table[3] = 0x8000;
1060 /* the multicast address in Hash Table : 64 bits */
1061 for (i = 0; i < mc_cnt; i++, mcptr = mcptr->next) {
1062 hash_val = cal_CRC((char *) mcptr->dmi_addr, 6, 0) & 0x3f;
1063 hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
1066 /* Write the hash table to MAC MD table */
1067 for (i = 0, oft = 0x16; i < 4; i++) {
1068 iow(db, oft++, hash_table[i] & 0xff);
1069 iow(db, oft++, (hash_table[i] >> 8) & 0xff);
1072 spin_unlock_irqrestore(&db->lock,flags);
1077 * Read a word from phyxcer
1080 dm9000_phy_read(struct net_device *dev, int phy_reg_unused, int reg)
1082 board_info_t *db = (board_info_t *) dev->priv;
1083 unsigned long flags;
1084 unsigned int reg_save;
1087 spin_lock_irqsave(&db->lock,flags);
1089 /* Save previous register address */
1090 reg_save = readb(db->io_addr);
1092 /* Fill the phyxcer register into REG_0C */
1093 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1095 iow(db, DM9000_EPCR, 0xc); /* Issue phyxcer read command */
1096 udelay(100); /* Wait read complete */
1097 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer read command */
1099 /* The read data keeps on REG_0D & REG_0E */
1100 ret = (ior(db, DM9000_EPDRH) << 8) | ior(db, DM9000_EPDRL);
1102 /* restore the previous address */
1103 writeb(reg_save, db->io_addr);
1105 spin_unlock_irqrestore(&db->lock,flags);
1111 * Write a word to phyxcer
1114 dm9000_phy_write(struct net_device *dev, int phyaddr_unused, int reg, int value)
1116 board_info_t *db = (board_info_t *) dev->priv;
1117 unsigned long flags;
1118 unsigned long reg_save;
1120 spin_lock_irqsave(&db->lock,flags);
1122 /* Save previous register address */
1123 reg_save = readb(db->io_addr);
1125 /* Fill the phyxcer register into REG_0C */
1126 iow(db, DM9000_EPAR, DM9000_PHY | reg);
1128 /* Fill the written data into REG_0D & REG_0E */
1129 iow(db, DM9000_EPDRL, (value & 0xff));
1130 iow(db, DM9000_EPDRH, ((value >> 8) & 0xff));
1132 iow(db, DM9000_EPCR, 0xa); /* Issue phyxcer write command */
1133 udelay(500); /* Wait write complete */
1134 iow(db, DM9000_EPCR, 0x0); /* Clear phyxcer write command */
1136 /* restore the previous address */
1137 writeb(reg_save, db->io_addr);
1139 spin_unlock_irqrestore(&db->lock,flags);
1143 dm9000_drv_suspend(struct platform_device *dev, pm_message_t state)
1145 struct net_device *ndev = platform_get_drvdata(dev);
1148 if (netif_running(ndev)) {
1149 netif_device_detach(ndev);
1150 dm9000_shutdown(ndev);
1157 dm9000_drv_resume(struct platform_device *dev)
1159 struct net_device *ndev = platform_get_drvdata(dev);
1160 board_info_t *db = (board_info_t *) ndev->priv;
1164 if (netif_running(ndev)) {
1166 dm9000_init_dm9000(ndev);
1168 netif_device_attach(ndev);
1175 dm9000_drv_remove(struct platform_device *pdev)
1177 struct net_device *ndev = platform_get_drvdata(pdev);
1179 platform_set_drvdata(pdev, NULL);
1181 unregister_netdev(ndev);
1182 dm9000_release_board(pdev, (board_info_t *) ndev->priv);
1183 kfree(ndev); /* free device structure */
1185 PRINTK1("clean_module() exit\n");
1190 static struct platform_driver dm9000_driver = {
1191 .probe = dm9000_probe,
1192 .remove = dm9000_drv_remove,
1193 .suspend = dm9000_drv_suspend,
1194 .resume = dm9000_drv_resume,
1203 printk(KERN_INFO "%s Ethernet Driver\n", CARDNAME);
1205 return platform_driver_register(&dm9000_driver); /* search board and register */
1209 dm9000_cleanup(void)
1211 platform_driver_unregister(&dm9000_driver);
1214 module_init(dm9000_init);
1215 module_exit(dm9000_cleanup);
1217 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1218 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1219 MODULE_LICENSE("GPL");