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 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 device
*dev
)
384 struct platform_device
*pdev
= to_platform_device(dev
);
385 struct dm9000_plat_data
*pdata
= pdev
->dev
.platform_data
;
386 struct board_info
*db
; /* Point a board information structure */
387 struct net_device
*ndev
;
394 /* Init network device */
395 ndev
= alloc_etherdev(sizeof (struct board_info
));
397 printk("%s: could not allocate device.\n", CARDNAME
);
401 SET_MODULE_OWNER(ndev
);
402 SET_NETDEV_DEV(ndev
, dev
);
404 PRINTK2("dm9000_probe()");
406 /* setup board info structure */
407 db
= (struct board_info
*) ndev
->priv
;
408 memset(db
, 0, sizeof (*db
));
410 spin_lock_init(&db
->lock
);
412 if (pdev
->num_resources
< 2) {
417 switch (pdev
->num_resources
) {
419 base
= pdev
->resource
[0].start
;
421 if (!request_mem_region(base
, 4, ndev
->name
)) {
426 ndev
->base_addr
= base
;
427 ndev
->irq
= pdev
->resource
[1].start
;
428 db
->io_addr
= (void *)base
;
429 db
->io_data
= (void *)(base
+ 4);
434 db
->addr_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
435 db
->data_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
436 db
->irq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
438 if (db
->addr_res
== NULL
|| db
->data_res
== NULL
) {
439 printk(KERN_ERR PFX
"insufficient resources\n");
444 i
= res_size(db
->addr_res
);
445 db
->addr_req
= request_mem_region(db
->addr_res
->start
, i
,
448 if (db
->addr_req
== NULL
) {
449 printk(KERN_ERR PFX
"cannot claim address reg area\n");
454 db
->io_addr
= ioremap(db
->addr_res
->start
, i
);
456 if (db
->io_addr
== NULL
) {
457 printk(KERN_ERR
"failed to ioremap address reg\n");
462 iosize
= res_size(db
->data_res
);
463 db
->data_req
= request_mem_region(db
->data_res
->start
, iosize
,
466 if (db
->data_req
== NULL
) {
467 printk(KERN_ERR PFX
"cannot claim data reg area\n");
472 db
->io_data
= ioremap(db
->data_res
->start
, iosize
);
474 if (db
->io_data
== NULL
) {
475 printk(KERN_ERR
"failed to ioremap data reg\n");
480 /* fill in parameters for net-dev structure */
482 ndev
->base_addr
= (unsigned long)db
->io_addr
;
483 ndev
->irq
= db
->irq_res
->start
;
485 /* ensure at least we have a default set of IO routines */
486 dm9000_set_io(db
, iosize
);
490 /* check to see if anything is being over-ridden */
492 /* check to see if the driver wants to over-ride the
493 * default IO width */
495 if (pdata
->flags
& DM9000_PLATF_8BITONLY
)
496 dm9000_set_io(db
, 1);
498 if (pdata
->flags
& DM9000_PLATF_16BITONLY
)
499 dm9000_set_io(db
, 2);
501 if (pdata
->flags
& DM9000_PLATF_32BITONLY
)
502 dm9000_set_io(db
, 4);
504 /* check to see if there are any IO routine
507 if (pdata
->inblk
!= NULL
)
508 db
->inblk
= pdata
->inblk
;
510 if (pdata
->outblk
!= NULL
)
511 db
->outblk
= pdata
->outblk
;
513 if (pdata
->dumpblk
!= NULL
)
514 db
->dumpblk
= pdata
->dumpblk
;
519 /* try two times, DM9000 sometimes gets the first read wrong */
520 for (i
= 0; i
< 2; i
++) {
521 id_val
= ior(db
, DM9000_VIDL
);
522 id_val
|= (u32
)ior(db
, DM9000_VIDH
) << 8;
523 id_val
|= (u32
)ior(db
, DM9000_PIDL
) << 16;
524 id_val
|= (u32
)ior(db
, DM9000_PIDH
) << 24;
526 if (id_val
== DM9000_ID
)
528 printk("%s: read wrong id 0x%08x\n", CARDNAME
, id_val
);
531 if (id_val
!= DM9000_ID
) {
532 printk("%s: wrong id: 0x%08x\n", CARDNAME
, id_val
);
536 /* from this point we assume that we have found a DM9000 */
538 /* driver system function */
541 ndev
->open
= &dm9000_open
;
542 ndev
->hard_start_xmit
= &dm9000_start_xmit
;
543 ndev
->tx_timeout
= &dm9000_timeout
;
544 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
545 ndev
->stop
= &dm9000_stop
;
546 ndev
->get_stats
= &dm9000_get_stats
;
547 ndev
->set_multicast_list
= &dm9000_hash_table
;
549 #ifdef DM9000_PROGRAM_EEPROM
552 db
->msg_enable
= NETIF_MSG_LINK
;
553 db
->mii
.phy_id_mask
= 0x1f;
554 db
->mii
.reg_num_mask
= 0x1f;
555 db
->mii
.force_media
= 0;
556 db
->mii
.full_duplex
= 0;
558 db
->mii
.mdio_read
= dm9000_phy_read
;
559 db
->mii
.mdio_write
= dm9000_phy_write
;
561 /* Read SROM content */
562 for (i
= 0; i
< 64; i
++)
563 ((u16
*) db
->srom
)[i
] = read_srom_word(db
, i
);
565 /* Set Node Address */
566 for (i
= 0; i
< 6; i
++)
567 ndev
->dev_addr
[i
] = db
->srom
[i
];
569 if (!is_valid_ether_addr(ndev
->dev_addr
))
570 printk("%s: Invalid ethernet MAC address. Please "
571 "set using ifconfig\n", ndev
->name
);
573 dev_set_drvdata(dev
, ndev
);
574 ret
= register_netdev(ndev
);
577 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
578 ndev
->name
, db
->io_addr
, db
->io_data
, ndev
->irq
);
579 for (i
= 0; i
< 5; i
++)
580 printk("%02x:", ndev
->dev_addr
[i
]);
581 printk("%02x\n", ndev
->dev_addr
[5]);
587 printk("%s: not found (%d).\n", CARDNAME
, ret
);
589 dm9000_release_board(pdev
, db
);
596 * Open the interface.
597 * The interface is opened whenever "ifconfig" actives it.
600 dm9000_open(struct net_device
*dev
)
602 board_info_t
*db
= (board_info_t
*) dev
->priv
;
604 PRINTK2("entering dm9000_open\n");
606 if (request_irq(dev
->irq
, &dm9000_interrupt
, SA_SHIRQ
, dev
->name
, dev
))
609 /* Initialize DM9000 board */
611 dm9000_init_dm9000(dev
);
613 /* Init driver variable */
616 /* set and active a timer process */
617 init_timer(&db
->timer
);
618 db
->timer
.expires
= DM9000_TIMER_WUT
;
619 db
->timer
.data
= (unsigned long) dev
;
620 db
->timer
.function
= &dm9000_timer
;
621 add_timer(&db
->timer
);
623 mii_check_media(&db
->mii
, netif_msg_link(db
), 1);
624 netif_start_queue(dev
);
630 * Initilize dm9000 board
633 dm9000_init_dm9000(struct net_device
*dev
)
635 board_info_t
*db
= (board_info_t
*) dev
->priv
;
637 PRINTK1("entering %s\n",__FUNCTION__
);
640 db
->io_mode
= ior(db
, DM9000_ISR
) >> 6; /* ISR bit7:6 keeps I/O mode */
642 /* GPIO0 on pre-activate PHY */
643 iow(db
, DM9000_GPR
, 0); /* REG_1F bit0 activate phyxcer */
644 iow(db
, DM9000_GPCR
, GPCR_GEP_CNTL
); /* Let GPIO0 output */
645 iow(db
, DM9000_GPR
, 0); /* Enable PHY */
647 /* Program operating register */
648 iow(db
, DM9000_TCR
, 0); /* TX Polling clear */
649 iow(db
, DM9000_BPTR
, 0x3f); /* Less 3Kb, 200us */
650 iow(db
, DM9000_FCR
, 0xff); /* Flow Control */
651 iow(db
, DM9000_SMCR
, 0); /* Special Mode */
652 /* clear TX status */
653 iow(db
, DM9000_NSR
, NSR_WAKEST
| NSR_TX2END
| NSR_TX1END
);
654 iow(db
, DM9000_ISR
, ISR_CLR_STATUS
); /* Clear interrupt status */
656 /* Set address filter table */
657 dm9000_hash_table(dev
);
659 /* Activate DM9000 */
660 iow(db
, DM9000_RCR
, RCR_DIS_LONG
| RCR_DIS_CRC
| RCR_RXEN
);
661 /* Enable TX/RX interrupt mask */
662 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
664 /* Init Driver variable */
666 db
->queue_pkt_len
= 0;
667 dev
->trans_start
= 0;
668 spin_lock_init(&db
->lock
);
672 * Hardware start transmission.
673 * Send a packet to media from the upper layer.
676 dm9000_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
678 board_info_t
*db
= (board_info_t
*) dev
->priv
;
680 PRINTK3("dm9000_start_xmit\n");
682 if (db
->tx_pkt_cnt
> 1)
685 netif_stop_queue(dev
);
687 /* Disable all interrupts */
688 iow(db
, DM9000_IMR
, IMR_PAR
);
690 /* Move data to DM9000 TX RAM */
691 writeb(DM9000_MWCMD
, db
->io_addr
);
693 (db
->outblk
)(db
->io_data
, skb
->data
, skb
->len
);
694 db
->stats
.tx_bytes
+= skb
->len
;
696 /* TX control: First packet immediately send, second packet queue */
697 if (db
->tx_pkt_cnt
== 0) {
702 /* Set TX length to DM9000 */
703 iow(db
, DM9000_TXPLL
, skb
->len
& 0xff);
704 iow(db
, DM9000_TXPLH
, (skb
->len
>> 8) & 0xff);
706 /* Issue TX polling command */
707 iow(db
, DM9000_TCR
, TCR_TXREQ
); /* Cleared after TX complete */
709 dev
->trans_start
= jiffies
; /* save the time stamp */
714 db
->queue_pkt_len
= skb
->len
;
720 /* Re-enable resource check */
721 if (db
->tx_pkt_cnt
== 1)
722 netif_wake_queue(dev
);
724 /* Re-enable interrupt */
725 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
731 dm9000_shutdown(struct net_device
*dev
)
733 board_info_t
*db
= (board_info_t
*) dev
->priv
;
736 dm9000_phy_write(dev
, 0, MII_BMCR
, BMCR_RESET
); /* PHY RESET */
737 iow(db
, DM9000_GPR
, 0x01); /* Power-Down PHY */
738 iow(db
, DM9000_IMR
, IMR_PAR
); /* Disable all interrupt */
739 iow(db
, DM9000_RCR
, 0x00); /* Disable RX */
743 * Stop the interface.
744 * The interface is stopped when it is brought.
747 dm9000_stop(struct net_device
*ndev
)
749 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
751 PRINTK1("entering %s\n",__FUNCTION__
);
754 del_timer(&db
->timer
);
756 netif_stop_queue(ndev
);
757 netif_carrier_off(ndev
);
760 free_irq(ndev
->irq
, ndev
);
762 dm9000_shutdown(ndev
);
768 * DM9000 interrupt handler
769 * receive the packet to upper layer, free the transmitted packet
773 dm9000_tx_done(struct net_device
*dev
, board_info_t
* db
)
775 int tx_status
= ior(db
, DM9000_NSR
); /* Got TX status */
777 if (tx_status
& (NSR_TX2END
| NSR_TX1END
)) {
778 /* One packet sent complete */
780 db
->stats
.tx_packets
++;
782 /* Queue packet check & send */
783 if (db
->tx_pkt_cnt
> 0) {
784 iow(db
, DM9000_TXPLL
, db
->queue_pkt_len
& 0xff);
785 iow(db
, DM9000_TXPLH
, (db
->queue_pkt_len
>> 8) & 0xff);
786 iow(db
, DM9000_TCR
, TCR_TXREQ
);
787 dev
->trans_start
= jiffies
;
789 netif_wake_queue(dev
);
794 dm9000_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
796 struct net_device
*dev
= dev_id
;
801 PRINTK3("entering %s\n",__FUNCTION__
);
804 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
808 /* A real interrupt coming */
809 db
= (board_info_t
*) dev
->priv
;
810 spin_lock(&db
->lock
);
812 /* Save previous register address */
813 reg_save
= readb(db
->io_addr
);
815 /* Disable all interrupts */
816 iow(db
, DM9000_IMR
, IMR_PAR
);
818 /* Got DM9000 interrupt status */
819 int_status
= ior(db
, DM9000_ISR
); /* Got ISR */
820 iow(db
, DM9000_ISR
, int_status
); /* Clear ISR status */
822 /* Received the coming packet */
823 if (int_status
& ISR_PRS
)
826 /* Trnasmit Interrupt check */
827 if (int_status
& ISR_PTS
)
828 dm9000_tx_done(dev
, db
);
830 /* Re-enable interrupt mask */
831 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
833 /* Restore previous register address */
834 writeb(reg_save
, db
->io_addr
);
836 spin_unlock(&db
->lock
);
842 * Get statistics from driver.
844 static struct net_device_stats
*
845 dm9000_get_stats(struct net_device
*dev
)
847 board_info_t
*db
= (board_info_t
*) dev
->priv
;
853 * A periodic timer routine
854 * Dynamic media sense, allocated Rx buffer...
857 dm9000_timer(unsigned long data
)
859 struct net_device
*dev
= (struct net_device
*) data
;
860 board_info_t
*db
= (board_info_t
*) dev
->priv
;
862 PRINTK3("dm9000_timer()\n");
864 mii_check_media(&db
->mii
, netif_msg_link(db
), 0);
866 /* Set timer again */
867 db
->timer
.expires
= DM9000_TIMER_WUT
;
868 add_timer(&db
->timer
);
871 struct dm9000_rxhdr
{
874 } __attribute__((__packed__
));
877 * Received a packet and pass to upper layer
880 dm9000_rx(struct net_device
*dev
)
882 board_info_t
*db
= (board_info_t
*) dev
->priv
;
883 struct dm9000_rxhdr rxhdr
;
889 /* Check packet ready or not */
891 ior(db
, DM9000_MRCMDX
); /* Dummy read */
893 /* Get most updated data */
894 rxbyte
= readb(db
->io_data
);
896 /* Status check: this byte must be 0 or 1 */
897 if (rxbyte
> DM9000_PKT_RDY
) {
898 printk("status check failed: %d\n", rxbyte
);
899 iow(db
, DM9000_RCR
, 0x00); /* Stop Device */
900 iow(db
, DM9000_ISR
, IMR_PAR
); /* Stop INT request */
904 if (rxbyte
!= DM9000_PKT_RDY
)
907 /* A packet ready now & Get status/length */
909 writeb(DM9000_MRCMD
, db
->io_addr
);
911 (db
->inblk
)(db
->io_data
, &rxhdr
, sizeof(rxhdr
));
915 /* Packet Status check */
918 PRINTK1("Bad Packet received (runt)\n");
921 if (RxLen
> DM9000_PKT_MAX
) {
922 PRINTK1("RST: RX Len:%x\n", RxLen
);
925 if (rxhdr
.RxStatus
& 0xbf00) {
927 if (rxhdr
.RxStatus
& 0x100) {
928 PRINTK1("fifo error\n");
929 db
->stats
.rx_fifo_errors
++;
931 if (rxhdr
.RxStatus
& 0x200) {
932 PRINTK1("crc error\n");
933 db
->stats
.rx_crc_errors
++;
935 if (rxhdr
.RxStatus
& 0x8000) {
936 PRINTK1("length error\n");
937 db
->stats
.rx_length_errors
++;
941 /* Move data from DM9000 */
943 && ((skb
= dev_alloc_skb(RxLen
+ 4)) != NULL
)) {
946 rdptr
= (u8
*) skb_put(skb
, RxLen
- 4);
948 /* Read received packet from RX SRAM */
950 (db
->inblk
)(db
->io_data
, rdptr
, RxLen
);
951 db
->stats
.rx_bytes
+= RxLen
;
953 /* Pass to upper layer */
954 skb
->protocol
= eth_type_trans(skb
, dev
);
956 db
->stats
.rx_packets
++;
959 /* need to dump the packet's data */
961 (db
->dumpblk
)(db
->io_data
, RxLen
);
963 } while (rxbyte
== DM9000_PKT_RDY
);
967 * Read a word data from SROM
970 read_srom_word(board_info_t
* db
, int offset
)
972 iow(db
, DM9000_EPAR
, offset
);
973 iow(db
, DM9000_EPCR
, EPCR_ERPRR
);
974 mdelay(8); /* according to the datasheet 200us should be enough,
975 but it doesn't work */
976 iow(db
, DM9000_EPCR
, 0x0);
977 return (ior(db
, DM9000_EPDRL
) + (ior(db
, DM9000_EPDRH
) << 8));
980 #ifdef DM9000_PROGRAM_EEPROM
982 * Write a word data to SROM
985 write_srom_word(board_info_t
* db
, int offset
, u16 val
)
987 iow(db
, DM9000_EPAR
, offset
);
988 iow(db
, DM9000_EPDRH
, ((val
>> 8) & 0xff));
989 iow(db
, DM9000_EPDRL
, (val
& 0xff));
990 iow(db
, DM9000_EPCR
, EPCR_WEP
| EPCR_ERPRW
);
991 mdelay(8); /* same shit */
992 iow(db
, DM9000_EPCR
, 0);
996 * Only for development:
997 * Here we write static data to the eeprom in case
998 * we don't have valid content on a new board
1001 program_eeprom(board_info_t
* db
)
1003 u16 eeprom
[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1004 0x0000, /* Autoload: accept nothing */
1005 0x0a46, 0x9000, /* Vendor / Product ID */
1006 0x0000, /* pin control */
1008 }; /* Wake-up mode control */
1010 for (i
= 0; i
< 8; i
++)
1011 write_srom_word(db
, i
, eeprom
[i
]);
1017 * Calculate the CRC valude of the Rx packet
1018 * flag = 1 : return the reverse CRC (for the received packet CRC)
1019 * 0 : return the normal CRC (for Hash Table index)
1022 static unsigned long
1023 cal_CRC(unsigned char *Data
, unsigned int Len
, u8 flag
)
1026 u32 crc
= ether_crc_le(Len
, Data
);
1035 * Set DM9000 multicast address
1038 dm9000_hash_table(struct net_device
*dev
)
1040 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1041 struct dev_mc_list
*mcptr
= dev
->mc_list
;
1042 int mc_cnt
= dev
->mc_count
;
1044 u16 i
, oft
, hash_table
[4];
1045 unsigned long flags
;
1047 PRINTK2("dm9000_hash_table()\n");
1049 spin_lock_irqsave(&db
->lock
,flags
);
1051 for (i
= 0, oft
= 0x10; i
< 6; i
++, oft
++)
1052 iow(db
, oft
, dev
->dev_addr
[i
]);
1054 /* Clear Hash Table */
1055 for (i
= 0; i
< 4; i
++)
1056 hash_table
[i
] = 0x0;
1058 /* broadcast address */
1059 hash_table
[3] = 0x8000;
1061 /* the multicast address in Hash Table : 64 bits */
1062 for (i
= 0; i
< mc_cnt
; i
++, mcptr
= mcptr
->next
) {
1063 hash_val
= cal_CRC((char *) mcptr
->dmi_addr
, 6, 0) & 0x3f;
1064 hash_table
[hash_val
/ 16] |= (u16
) 1 << (hash_val
% 16);
1067 /* Write the hash table to MAC MD table */
1068 for (i
= 0, oft
= 0x16; i
< 4; i
++) {
1069 iow(db
, oft
++, hash_table
[i
] & 0xff);
1070 iow(db
, oft
++, (hash_table
[i
] >> 8) & 0xff);
1073 spin_unlock_irqrestore(&db
->lock
,flags
);
1078 * Read a word from phyxcer
1081 dm9000_phy_read(struct net_device
*dev
, int phy_reg_unused
, int reg
)
1083 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1084 unsigned long flags
;
1085 unsigned int reg_save
;
1088 spin_lock_irqsave(&db
->lock
,flags
);
1090 /* Save previous register address */
1091 reg_save
= readb(db
->io_addr
);
1093 /* Fill the phyxcer register into REG_0C */
1094 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1096 iow(db
, DM9000_EPCR
, 0xc); /* Issue phyxcer read command */
1097 udelay(100); /* Wait read complete */
1098 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer read command */
1100 /* The read data keeps on REG_0D & REG_0E */
1101 ret
= (ior(db
, DM9000_EPDRH
) << 8) | ior(db
, DM9000_EPDRL
);
1103 /* restore the previous address */
1104 writeb(reg_save
, db
->io_addr
);
1106 spin_unlock_irqrestore(&db
->lock
,flags
);
1112 * Write a word to phyxcer
1115 dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
, int value
)
1117 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1118 unsigned long flags
;
1119 unsigned long 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 /* Fill the written data into REG_0D & REG_0E */
1130 iow(db
, DM9000_EPDRL
, (value
& 0xff));
1131 iow(db
, DM9000_EPDRH
, ((value
>> 8) & 0xff));
1133 iow(db
, DM9000_EPCR
, 0xa); /* Issue phyxcer write command */
1134 udelay(500); /* Wait write complete */
1135 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer write command */
1137 /* restore the previous address */
1138 writeb(reg_save
, db
->io_addr
);
1140 spin_unlock_irqrestore(&db
->lock
,flags
);
1144 dm9000_drv_suspend(struct device
*dev
, pm_message_t state
)
1146 struct net_device
*ndev
= dev_get_drvdata(dev
);
1149 if (netif_running(ndev
)) {
1150 netif_device_detach(ndev
);
1151 dm9000_shutdown(ndev
);
1158 dm9000_drv_resume(struct device
*dev
)
1160 struct net_device
*ndev
= dev_get_drvdata(dev
);
1161 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
1165 if (netif_running(ndev
)) {
1167 dm9000_init_dm9000(ndev
);
1169 netif_device_attach(ndev
);
1176 dm9000_drv_remove(struct device
*dev
)
1178 struct platform_device
*pdev
= to_platform_device(dev
);
1179 struct net_device
*ndev
= dev_get_drvdata(dev
);
1181 dev_set_drvdata(dev
, NULL
);
1183 unregister_netdev(ndev
);
1184 dm9000_release_board(pdev
, (board_info_t
*) ndev
->priv
);
1185 kfree(ndev
); /* free device structure */
1187 PRINTK1("clean_module() exit\n");
1192 static struct device_driver dm9000_driver
= {
1194 .bus
= &platform_bus_type
,
1195 .probe
= dm9000_probe
,
1196 .remove
= dm9000_drv_remove
,
1197 .suspend
= dm9000_drv_suspend
,
1198 .resume
= dm9000_drv_resume
,
1204 printk(KERN_INFO
"%s Ethernet Driver\n", CARDNAME
);
1206 return driver_register(&dm9000_driver
); /* search board and register */
1210 dm9000_cleanup(void)
1212 driver_unregister(&dm9000_driver
);
1215 module_init(dm9000_init
);
1216 module_exit(dm9000_cleanup
);
1218 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1219 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1220 MODULE_LICENSE("GPL");