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
53 #include <linux/module.h>
54 #include <linux/ioport.h>
55 #include <linux/netdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/init.h>
58 #include <linux/skbuff.h>
59 #include <linux/version.h>
60 #include <linux/spinlock.h>
61 #include <linux/crc32.h>
62 #include <linux/mii.h>
63 #include <linux/dm9000.h>
64 #include <linux/delay.h>
66 #include <asm/delay.h>
72 /* Board/System/Debug information/definition ---------------- */
74 #define DM9000_PHY 0x40 /* PHY address 0x01 */
79 #define CARDNAME "dm9000"
80 #define PFX CARDNAME ": "
82 #define DM9000_TIMER_WUT jiffies+(HZ*2) /* timer wakeup time : 2 second */
84 #define DM9000_DEBUG 0
87 #define PRINTK3(args...) printk(CARDNAME ": " args)
89 #define PRINTK3(args...) do { } while(0)
93 #define PRINTK2(args...) printk(CARDNAME ": " args)
95 #define PRINTK2(args...) do { } while(0)
99 #define PRINTK1(args...) printk(CARDNAME ": " args)
100 #define PRINTK(args...) printk(CARDNAME ": " args)
102 #define PRINTK1(args...) do { } while(0)
103 #define PRINTK(args...) printk(KERN_DEBUG args)
107 * Transmit timeout, default 5 seconds.
109 static int watchdog
= 5000;
110 module_param(watchdog
, int, 0400);
111 MODULE_PARM_DESC(watchdog
, "transmit timeout in milliseconds");
113 /* Structure/enum declaration ------------------------------- */
114 typedef struct board_info
{
116 void __iomem
*io_addr
; /* Register I/O base address */
117 void __iomem
*io_data
; /* Data I/O address */
122 u16 queue_start_addr
;
124 u8 io_mode
; /* 0:word, 2:byte */
127 void (*inblk
)(void __iomem
*port
, void *data
, int length
);
128 void (*outblk
)(void __iomem
*port
, void *data
, int length
);
129 void (*dumpblk
)(void __iomem
*port
, int length
);
131 struct resource
*addr_res
; /* resources found */
132 struct resource
*data_res
;
133 struct resource
*addr_req
; /* resources requested */
134 struct resource
*data_req
;
135 struct resource
*irq_res
;
137 struct timer_list timer
;
138 struct net_device_stats stats
;
139 unsigned char srom
[128];
142 struct mii_if_info mii
;
146 /* function declaration ------------------------------------- */
147 static int dm9000_probe(struct device
*);
148 static int dm9000_open(struct net_device
*);
149 static int dm9000_start_xmit(struct sk_buff
*, struct net_device
*);
150 static int dm9000_stop(struct net_device
*);
151 static int dm9000_do_ioctl(struct net_device
*, struct ifreq
*, int);
154 static void dm9000_timer(unsigned long);
155 static void dm9000_init_dm9000(struct net_device
*);
157 static struct net_device_stats
*dm9000_get_stats(struct net_device
*);
159 static irqreturn_t
dm9000_interrupt(int, void *, struct pt_regs
*);
161 static int dm9000_phy_read(struct net_device
*dev
, int phyaddr_unsused
, int reg
);
162 static void dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
,
164 static u16
read_srom_word(board_info_t
*, int);
165 static void dm9000_rx(struct net_device
*);
166 static void dm9000_hash_table(struct net_device
*);
168 //#define DM9000_PROGRAM_EEPROM
169 #ifdef DM9000_PROGRAM_EEPROM
170 static void program_eeprom(board_info_t
* db
);
172 /* DM9000 network board routine ---------------------------- */
175 dm9000_reset(board_info_t
* db
)
177 PRINTK1("dm9000x: resetting\n");
179 writeb(DM9000_NCR
, db
->io_addr
);
181 writeb(NCR_RST
, db
->io_data
);
186 * Read a byte from I/O port
189 ior(board_info_t
* db
, int reg
)
191 writeb(reg
, db
->io_addr
);
192 return readb(db
->io_data
);
196 * Write a byte to I/O port
200 iow(board_info_t
* db
, int reg
, int value
)
202 writeb(reg
, db
->io_addr
);
203 writeb(value
, db
->io_data
);
206 /* routines for sending block to chip */
208 static void dm9000_outblk_8bit(void __iomem
*reg
, void *data
, int count
)
210 writesb(reg
, data
, count
);
213 static void dm9000_outblk_16bit(void __iomem
*reg
, void *data
, int count
)
215 writesw(reg
, data
, (count
+1) >> 1);
218 static void dm9000_outblk_32bit(void __iomem
*reg
, void *data
, int count
)
220 writesl(reg
, data
, (count
+3) >> 2);
223 /* input block from chip to memory */
225 static void dm9000_inblk_8bit(void __iomem
*reg
, void *data
, int count
)
227 readsb(reg
, data
, count
+1);
231 static void dm9000_inblk_16bit(void __iomem
*reg
, void *data
, int count
)
233 readsw(reg
, data
, (count
+1) >> 1);
236 static void dm9000_inblk_32bit(void __iomem
*reg
, void *data
, int count
)
238 readsl(reg
, data
, (count
+3) >> 2);
241 /* dump block from chip to null */
243 static void dm9000_dumpblk_8bit(void __iomem
*reg
, int count
)
248 for (i
= 0; i
< count
; i
++)
252 static void dm9000_dumpblk_16bit(void __iomem
*reg
, int count
)
257 count
= (count
+ 1) >> 1;
259 for (i
= 0; i
< count
; i
++)
263 static void dm9000_dumpblk_32bit(void __iomem
*reg
, int count
)
268 count
= (count
+ 3) >> 2;
270 for (i
= 0; i
< count
; i
++)
276 * select the specified set of io routines to use with the
280 static void dm9000_set_io(struct board_info
*db
, int byte_width
)
282 /* use the size of the data resource to work out what IO
283 * routines we want to use
286 switch (byte_width
) {
288 db
->dumpblk
= dm9000_dumpblk_8bit
;
289 db
->outblk
= dm9000_outblk_8bit
;
290 db
->inblk
= dm9000_inblk_8bit
;
294 db
->dumpblk
= dm9000_dumpblk_16bit
;
295 db
->outblk
= dm9000_outblk_16bit
;
296 db
->inblk
= dm9000_inblk_16bit
;
300 printk(KERN_ERR PFX
": 3 byte IO, falling back to 16bit\n");
301 db
->dumpblk
= dm9000_dumpblk_16bit
;
302 db
->outblk
= dm9000_outblk_16bit
;
303 db
->inblk
= dm9000_inblk_16bit
;
308 db
->dumpblk
= dm9000_dumpblk_32bit
;
309 db
->outblk
= dm9000_outblk_32bit
;
310 db
->inblk
= dm9000_inblk_32bit
;
316 /* Our watchdog timed out. Called by the networking layer */
317 static void dm9000_timeout(struct net_device
*dev
)
319 board_info_t
*db
= (board_info_t
*) dev
->priv
;
323 /* Save previous register address */
324 reg_save
= readb(db
->io_addr
);
325 spin_lock_irqsave(db
->lock
,flags
);
327 netif_stop_queue(dev
);
329 dm9000_init_dm9000(dev
);
330 /* We can accept TX packets again */
331 dev
->trans_start
= jiffies
;
332 netif_wake_queue(dev
);
334 /* Restore previous register address */
335 writeb(reg_save
, db
->io_addr
);
336 spin_unlock_irqrestore(db
->lock
,flags
);
340 /* dm9000_release_board
342 * release a board, and any mapped resources
346 dm9000_release_board(struct platform_device
*pdev
, struct board_info
*db
)
348 if (db
->data_res
== NULL
) {
349 if (db
->addr_res
!= NULL
)
350 release_mem_region((unsigned long)db
->io_addr
, 4);
354 /* unmap our resources */
356 iounmap(db
->io_addr
);
357 iounmap(db
->io_data
);
359 /* release the resources */
361 if (db
->data_req
!= NULL
) {
362 release_resource(db
->data_req
);
366 if (db
->addr_res
!= NULL
) {
367 release_resource(db
->data_req
);
372 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
375 * Search DM9000 board, allocate space and register it
378 dm9000_probe(struct device
*dev
)
380 struct platform_device
*pdev
= to_platform_device(dev
);
381 struct dm9000_plat_data
*pdata
= pdev
->dev
.platform_data
;
382 struct board_info
*db
; /* Point a board information structure */
383 struct net_device
*ndev
;
390 printk(KERN_INFO
"%s Ethernet Driver\n", CARDNAME
);
392 /* Init network device */
393 ndev
= alloc_etherdev(sizeof (struct board_info
));
395 printk("%s: could not allocate device.\n", CARDNAME
);
399 SET_MODULE_OWNER(ndev
);
400 SET_NETDEV_DEV(ndev
, dev
);
402 PRINTK2("dm9000_probe()");
404 /* setup board info structure */
405 db
= (struct board_info
*) ndev
->priv
;
406 memset(db
, 0, sizeof (*db
));
408 if (pdev
->num_resources
< 2) {
413 switch (pdev
->num_resources
) {
415 base
= pdev
->resource
[0].start
;
417 if (!request_mem_region(base
, 4, ndev
->name
)) {
422 ndev
->base_addr
= base
;
423 ndev
->irq
= pdev
->resource
[1].start
;
424 db
->io_addr
= (void *)base
;
425 db
->io_data
= (void *)(base
+ 4);
430 db
->addr_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
431 db
->data_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
432 db
->irq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
434 if (db
->addr_res
== NULL
|| db
->data_res
== NULL
) {
435 printk(KERN_ERR PFX
"insufficient resources\n");
440 i
= res_size(db
->addr_res
);
441 db
->addr_req
= request_mem_region(db
->addr_res
->start
, i
,
444 if (db
->addr_req
== NULL
) {
445 printk(KERN_ERR PFX
"cannot claim address reg area\n");
450 db
->io_addr
= ioremap(db
->addr_res
->start
, i
);
452 if (db
->io_addr
== NULL
) {
453 printk(KERN_ERR
"failed to ioremap address reg\n");
458 iosize
= res_size(db
->data_res
);
459 db
->data_req
= request_mem_region(db
->data_res
->start
, iosize
,
462 if (db
->data_req
== NULL
) {
463 printk(KERN_ERR PFX
"cannot claim data reg area\n");
468 db
->io_data
= ioremap(db
->data_res
->start
, iosize
);
470 if (db
->io_data
== NULL
) {
471 printk(KERN_ERR
"failed to ioremap data reg\n");
476 /* fill in parameters for net-dev structure */
478 ndev
->base_addr
= (unsigned long)db
->io_addr
;
479 ndev
->irq
= db
->irq_res
->start
;
481 /* ensure at least we have a default set of IO routines */
482 dm9000_set_io(db
, iosize
);
486 /* check to see if anything is being over-ridden */
488 /* check to see if the driver wants to over-ride the
489 * default IO width */
491 if (pdata
->flags
& DM9000_PLATF_8BITONLY
)
492 dm9000_set_io(db
, 1);
494 if (pdata
->flags
& DM9000_PLATF_16BITONLY
)
495 dm9000_set_io(db
, 2);
497 if (pdata
->flags
& DM9000_PLATF_32BITONLY
)
498 dm9000_set_io(db
, 4);
500 /* check to see if there are any IO routine
503 if (pdata
->inblk
!= NULL
)
504 db
->inblk
= pdata
->inblk
;
506 if (pdata
->outblk
!= NULL
)
507 db
->outblk
= pdata
->outblk
;
509 if (pdata
->dumpblk
!= NULL
)
510 db
->dumpblk
= pdata
->dumpblk
;
515 /* try two times, DM9000 sometimes gets the first read wrong */
516 for (i
= 0; i
< 2; i
++) {
517 id_val
= ior(db
, DM9000_VIDL
);
518 id_val
|= (u32
)ior(db
, DM9000_VIDH
) << 8;
519 id_val
|= (u32
)ior(db
, DM9000_PIDL
) << 16;
520 id_val
|= (u32
)ior(db
, DM9000_PIDH
) << 24;
522 if (id_val
== DM9000_ID
)
524 printk("%s: read wrong id 0x%08x\n", CARDNAME
, id_val
);
527 if (id_val
!= DM9000_ID
) {
528 printk("%s: wrong id: 0x%08x\n", CARDNAME
, id_val
);
532 /* from this point we assume that we have found a DM9000 */
534 /* driver system function */
537 ndev
->open
= &dm9000_open
;
538 ndev
->hard_start_xmit
= &dm9000_start_xmit
;
539 ndev
->tx_timeout
= &dm9000_timeout
;
540 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
541 ndev
->stop
= &dm9000_stop
;
542 ndev
->get_stats
= &dm9000_get_stats
;
543 ndev
->set_multicast_list
= &dm9000_hash_table
;
544 ndev
->do_ioctl
= &dm9000_do_ioctl
;
546 #ifdef DM9000_PROGRAM_EEPROM
549 db
->msg_enable
= NETIF_MSG_LINK
;
550 db
->mii
.phy_id_mask
= 0x1f;
551 db
->mii
.reg_num_mask
= 0x1f;
552 db
->mii
.force_media
= 0;
553 db
->mii
.full_duplex
= 0;
555 db
->mii
.mdio_read
= dm9000_phy_read
;
556 db
->mii
.mdio_write
= dm9000_phy_write
;
558 /* Read SROM content */
559 for (i
= 0; i
< 64; i
++)
560 ((u16
*) db
->srom
)[i
] = read_srom_word(db
, i
);
562 /* Set Node Address */
563 for (i
= 0; i
< 6; i
++)
564 ndev
->dev_addr
[i
] = db
->srom
[i
];
566 if (!is_valid_ether_addr(ndev
->dev_addr
))
567 printk("%s: Invalid ethernet MAC address. Please "
568 "set using ifconfig\n", ndev
->name
);
570 dev_set_drvdata(dev
, ndev
);
571 ret
= register_netdev(ndev
);
574 printk("%s: dm9000 at %p,%p IRQ %d MAC: ",
575 ndev
->name
, db
->io_addr
, db
->io_data
, ndev
->irq
);
576 for (i
= 0; i
< 5; i
++)
577 printk("%02x:", ndev
->dev_addr
[i
]);
578 printk("%02x\n", ndev
->dev_addr
[5]);
584 printk("%s: not found (%d).\n", CARDNAME
, ret
);
586 dm9000_release_board(pdev
, db
);
593 * Open the interface.
594 * The interface is opened whenever "ifconfig" actives it.
597 dm9000_open(struct net_device
*dev
)
599 board_info_t
*db
= (board_info_t
*) dev
->priv
;
601 PRINTK2("entering dm9000_open\n");
603 if (request_irq(dev
->irq
, &dm9000_interrupt
, SA_SHIRQ
, dev
->name
, dev
))
606 /* Initialize DM9000 board */
608 dm9000_init_dm9000(dev
);
610 /* Init driver variable */
613 /* set and active a timer process */
614 init_timer(&db
->timer
);
615 db
->timer
.expires
= DM9000_TIMER_WUT
* 2;
616 db
->timer
.data
= (unsigned long) dev
;
617 db
->timer
.function
= &dm9000_timer
;
618 add_timer(&db
->timer
);
620 mii_check_media(&db
->mii
, netif_msg_link(db
), 1);
621 netif_start_queue(dev
);
627 * Initilize dm9000 board
630 dm9000_init_dm9000(struct net_device
*dev
)
632 board_info_t
*db
= (board_info_t
*) dev
->priv
;
634 PRINTK1("entering %s\n",__FUNCTION__
);
637 db
->io_mode
= ior(db
, DM9000_ISR
) >> 6; /* ISR bit7:6 keeps I/O mode */
639 /* GPIO0 on pre-activate PHY */
640 iow(db
, DM9000_GPR
, 0); /* REG_1F bit0 activate phyxcer */
641 iow(db
, DM9000_GPCR
, GPCR_GEP_CNTL
); /* Let GPIO0 output */
642 iow(db
, DM9000_GPR
, 0); /* Enable PHY */
644 /* Program operating register */
645 iow(db
, DM9000_TCR
, 0); /* TX Polling clear */
646 iow(db
, DM9000_BPTR
, 0x3f); /* Less 3Kb, 200us */
647 iow(db
, DM9000_FCR
, 0xff); /* Flow Control */
648 iow(db
, DM9000_SMCR
, 0); /* Special Mode */
649 /* clear TX status */
650 iow(db
, DM9000_NSR
, NSR_WAKEST
| NSR_TX2END
| NSR_TX1END
);
651 iow(db
, DM9000_ISR
, ISR_CLR_STATUS
); /* Clear interrupt status */
653 /* Set address filter table */
654 dm9000_hash_table(dev
);
656 /* Activate DM9000 */
657 iow(db
, DM9000_RCR
, RCR_DIS_LONG
| RCR_DIS_CRC
| RCR_RXEN
);
658 /* Enable TX/RX interrupt mask */
659 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
661 /* Init Driver variable */
663 db
->queue_pkt_len
= 0;
664 dev
->trans_start
= 0;
665 spin_lock_init(&db
->lock
);
669 * Hardware start transmission.
670 * Send a packet to media from the upper layer.
673 dm9000_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
675 board_info_t
*db
= (board_info_t
*) dev
->priv
;
677 PRINTK3("dm9000_start_xmit\n");
679 if (db
->tx_pkt_cnt
> 1)
682 netif_stop_queue(dev
);
684 /* Disable all interrupts */
685 iow(db
, DM9000_IMR
, IMR_PAR
);
687 /* Move data to DM9000 TX RAM */
688 writeb(DM9000_MWCMD
, db
->io_addr
);
690 (db
->outblk
)(db
->io_data
, skb
->data
, skb
->len
);
691 db
->stats
.tx_bytes
+= skb
->len
;
693 /* TX control: First packet immediately send, second packet queue */
694 if (db
->tx_pkt_cnt
== 0) {
699 /* Set TX length to DM9000 */
700 iow(db
, DM9000_TXPLL
, skb
->len
& 0xff);
701 iow(db
, DM9000_TXPLH
, (skb
->len
>> 8) & 0xff);
703 /* Issue TX polling command */
704 iow(db
, DM9000_TCR
, TCR_TXREQ
); /* Cleared after TX complete */
706 dev
->trans_start
= jiffies
; /* save the time stamp */
711 db
->queue_pkt_len
= skb
->len
;
717 /* Re-enable resource check */
718 if (db
->tx_pkt_cnt
== 1)
719 netif_wake_queue(dev
);
721 /* Re-enable interrupt */
722 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
728 dm9000_shutdown(struct net_device
*dev
)
730 board_info_t
*db
= (board_info_t
*) dev
->priv
;
733 dm9000_phy_write(dev
, 0, MII_BMCR
, BMCR_RESET
); /* PHY RESET */
734 iow(db
, DM9000_GPR
, 0x01); /* Power-Down PHY */
735 iow(db
, DM9000_IMR
, IMR_PAR
); /* Disable all interrupt */
736 iow(db
, DM9000_RCR
, 0x00); /* Disable RX */
740 * Stop the interface.
741 * The interface is stopped when it is brought.
744 dm9000_stop(struct net_device
*ndev
)
746 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
748 PRINTK1("entering %s\n",__FUNCTION__
);
751 del_timer(&db
->timer
);
753 netif_stop_queue(ndev
);
754 netif_carrier_off(ndev
);
757 free_irq(ndev
->irq
, ndev
);
759 dm9000_shutdown(ndev
);
765 * DM9000 interrupt handler
766 * receive the packet to upper layer, free the transmitted packet
770 dm9000_tx_done(struct net_device
*dev
, board_info_t
* db
)
772 int tx_status
= ior(db
, DM9000_NSR
); /* Got TX status */
774 if (tx_status
& (NSR_TX2END
| NSR_TX1END
)) {
775 /* One packet sent complete */
777 db
->stats
.tx_packets
++;
779 /* Queue packet check & send */
780 if (db
->tx_pkt_cnt
> 0) {
781 iow(db
, DM9000_TXPLL
, db
->queue_pkt_len
& 0xff);
782 iow(db
, DM9000_TXPLH
, (db
->queue_pkt_len
>> 8) & 0xff);
783 iow(db
, DM9000_TCR
, TCR_TXREQ
);
784 dev
->trans_start
= jiffies
;
786 netif_wake_queue(dev
);
791 dm9000_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
793 struct net_device
*dev
= dev_id
;
798 PRINTK3("entering %s\n",__FUNCTION__
);
801 PRINTK1("dm9000_interrupt() without DEVICE arg\n");
805 /* A real interrupt coming */
806 db
= (board_info_t
*) dev
->priv
;
807 spin_lock(&db
->lock
);
809 /* Save previous register address */
810 reg_save
= readb(db
->io_addr
);
812 /* Disable all interrupts */
813 iow(db
, DM9000_IMR
, IMR_PAR
);
815 /* Got DM9000 interrupt status */
816 int_status
= ior(db
, DM9000_ISR
); /* Got ISR */
817 iow(db
, DM9000_ISR
, int_status
); /* Clear ISR status */
819 /* Received the coming packet */
820 if (int_status
& ISR_PRS
)
823 /* Trnasmit Interrupt check */
824 if (int_status
& ISR_PTS
)
825 dm9000_tx_done(dev
, db
);
827 /* Re-enable interrupt mask */
828 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
830 /* Restore previous register address */
831 writeb(reg_save
, db
->io_addr
);
833 spin_unlock(&db
->lock
);
839 * Get statistics from driver.
841 static struct net_device_stats
*
842 dm9000_get_stats(struct net_device
*dev
)
844 board_info_t
*db
= (board_info_t
*) dev
->priv
;
849 * Process the upper socket ioctl command
852 dm9000_do_ioctl(struct net_device
*dev
, struct ifreq
*ifr
, int cmd
)
854 PRINTK1("entering %s\n",__FUNCTION__
);
859 * A periodic timer routine
860 * Dynamic media sense, allocated Rx buffer...
863 dm9000_timer(unsigned long data
)
865 struct net_device
*dev
= (struct net_device
*) data
;
866 board_info_t
*db
= (board_info_t
*) dev
->priv
;
870 PRINTK3("dm9000_timer()\n");
872 spin_lock_irqsave(db
->lock
,flags
);
873 /* Save previous register address */
874 reg_save
= readb(db
->io_addr
);
876 mii_check_media(&db
->mii
, netif_msg_link(db
), 0);
878 /* Restore previous register address */
879 writeb(reg_save
, db
->io_addr
);
880 spin_unlock_irqrestore(db
->lock
,flags
);
882 /* Set timer again */
883 db
->timer
.expires
= DM9000_TIMER_WUT
;
884 add_timer(&db
->timer
);
887 struct dm9000_rxhdr
{
890 } __attribute__((__packed__
));
893 * Received a packet and pass to upper layer
896 dm9000_rx(struct net_device
*dev
)
898 board_info_t
*db
= (board_info_t
*) dev
->priv
;
899 struct dm9000_rxhdr rxhdr
;
905 /* Check packet ready or not */
907 ior(db
, DM9000_MRCMDX
); /* Dummy read */
909 /* Get most updated data */
910 rxbyte
= readb(db
->io_data
);
912 /* Status check: this byte must be 0 or 1 */
913 if (rxbyte
> DM9000_PKT_RDY
) {
914 printk("status check failed: %d\n", rxbyte
);
915 iow(db
, DM9000_RCR
, 0x00); /* Stop Device */
916 iow(db
, DM9000_ISR
, IMR_PAR
); /* Stop INT request */
920 if (rxbyte
!= DM9000_PKT_RDY
)
923 /* A packet ready now & Get status/length */
925 writeb(DM9000_MRCMD
, db
->io_addr
);
927 (db
->inblk
)(db
->io_data
, &rxhdr
, sizeof(rxhdr
));
931 /* Packet Status check */
934 PRINTK1("Bad Packet received (runt)\n");
937 if (RxLen
> DM9000_PKT_MAX
) {
938 PRINTK1("RST: RX Len:%x\n", RxLen
);
941 if (rxhdr
.RxStatus
& 0xbf00) {
943 if (rxhdr
.RxStatus
& 0x100) {
944 PRINTK1("fifo error\n");
945 db
->stats
.rx_fifo_errors
++;
947 if (rxhdr
.RxStatus
& 0x200) {
948 PRINTK1("crc error\n");
949 db
->stats
.rx_crc_errors
++;
951 if (rxhdr
.RxStatus
& 0x8000) {
952 PRINTK1("length error\n");
953 db
->stats
.rx_length_errors
++;
957 /* Move data from DM9000 */
959 && ((skb
= dev_alloc_skb(RxLen
+ 4)) != NULL
)) {
962 rdptr
= (u8
*) skb_put(skb
, RxLen
- 4);
964 /* Read received packet from RX SRAM */
966 (db
->inblk
)(db
->io_data
, rdptr
, RxLen
);
967 db
->stats
.rx_bytes
+= RxLen
;
969 /* Pass to upper layer */
970 skb
->protocol
= eth_type_trans(skb
, dev
);
972 db
->stats
.rx_packets
++;
975 /* need to dump the packet's data */
977 (db
->dumpblk
)(db
->io_data
, RxLen
);
979 } while (rxbyte
== DM9000_PKT_RDY
);
983 * Read a word data from SROM
986 read_srom_word(board_info_t
* db
, int offset
)
988 iow(db
, DM9000_EPAR
, offset
);
989 iow(db
, DM9000_EPCR
, EPCR_ERPRR
);
990 mdelay(8); /* according to the datasheet 200us should be enough,
991 but it doesn't work */
992 iow(db
, DM9000_EPCR
, 0x0);
993 return (ior(db
, DM9000_EPDRL
) + (ior(db
, DM9000_EPDRH
) << 8));
996 #ifdef DM9000_PROGRAM_EEPROM
998 * Write a word data to SROM
1001 write_srom_word(board_info_t
* db
, int offset
, u16 val
)
1003 iow(db
, DM9000_EPAR
, offset
);
1004 iow(db
, DM9000_EPDRH
, ((val
>> 8) & 0xff));
1005 iow(db
, DM9000_EPDRL
, (val
& 0xff));
1006 iow(db
, DM9000_EPCR
, EPCR_WEP
| EPCR_ERPRW
);
1007 mdelay(8); /* same shit */
1008 iow(db
, DM9000_EPCR
, 0);
1012 * Only for development:
1013 * Here we write static data to the eeprom in case
1014 * we don't have valid content on a new board
1017 program_eeprom(board_info_t
* db
)
1019 u16 eeprom
[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1020 0x0000, /* Autoload: accept nothing */
1021 0x0a46, 0x9000, /* Vendor / Product ID */
1022 0x0000, /* pin control */
1024 }; /* Wake-up mode control */
1026 for (i
= 0; i
< 8; i
++)
1027 write_srom_word(db
, i
, eeprom
[i
]);
1033 * Calculate the CRC valude of the Rx packet
1034 * flag = 1 : return the reverse CRC (for the received packet CRC)
1035 * 0 : return the normal CRC (for Hash Table index)
1038 static unsigned long
1039 cal_CRC(unsigned char *Data
, unsigned int Len
, u8 flag
)
1042 u32 crc
= ether_crc_le(Len
, Data
);
1051 * Set DM9000 multicast address
1054 dm9000_hash_table(struct net_device
*dev
)
1056 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1057 struct dev_mc_list
*mcptr
= dev
->mc_list
;
1058 int mc_cnt
= dev
->mc_count
;
1060 u16 i
, oft
, hash_table
[4];
1061 unsigned long flags
;
1063 PRINTK2("dm9000_hash_table()\n");
1065 spin_lock_irqsave(&db
->lock
,flags
);
1067 for (i
= 0, oft
= 0x10; i
< 6; i
++, oft
++)
1068 iow(db
, oft
, dev
->dev_addr
[i
]);
1070 /* Clear Hash Table */
1071 for (i
= 0; i
< 4; i
++)
1072 hash_table
[i
] = 0x0;
1074 /* broadcast address */
1075 hash_table
[3] = 0x8000;
1077 /* the multicast address in Hash Table : 64 bits */
1078 for (i
= 0; i
< mc_cnt
; i
++, mcptr
= mcptr
->next
) {
1079 hash_val
= cal_CRC((char *) mcptr
->dmi_addr
, 6, 0) & 0x3f;
1080 hash_table
[hash_val
/ 16] |= (u16
) 1 << (hash_val
% 16);
1083 /* Write the hash table to MAC MD table */
1084 for (i
= 0, oft
= 0x16; i
< 4; i
++) {
1085 iow(db
, oft
++, hash_table
[i
] & 0xff);
1086 iow(db
, oft
++, (hash_table
[i
] >> 8) & 0xff);
1089 spin_unlock_irqrestore(&db
->lock
,flags
);
1094 * Read a word from phyxcer
1097 dm9000_phy_read(struct net_device
*dev
, int phy_reg_unused
, int reg
)
1099 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1100 unsigned long flags
;
1103 spin_lock_irqsave(&db
->lock
,flags
);
1104 /* Fill the phyxcer register into REG_0C */
1105 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1107 iow(db
, DM9000_EPCR
, 0xc); /* Issue phyxcer read command */
1108 udelay(100); /* Wait read complete */
1109 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer read command */
1111 /* The read data keeps on REG_0D & REG_0E */
1112 ret
= (ior(db
, DM9000_EPDRH
) << 8) | ior(db
, DM9000_EPDRL
);
1114 spin_unlock_irqrestore(&db
->lock
,flags
);
1120 * Write a word to phyxcer
1123 dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
, int value
)
1125 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1126 unsigned long flags
;
1128 spin_lock_irqsave(&db
->lock
,flags
);
1130 /* Fill the phyxcer register into REG_0C */
1131 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1133 /* Fill the written data into REG_0D & REG_0E */
1134 iow(db
, DM9000_EPDRL
, (value
& 0xff));
1135 iow(db
, DM9000_EPDRH
, ((value
>> 8) & 0xff));
1137 iow(db
, DM9000_EPCR
, 0xa); /* Issue phyxcer write command */
1138 udelay(500); /* Wait write complete */
1139 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer write command */
1141 spin_unlock_irqrestore(&db
->lock
,flags
);
1145 dm9000_drv_suspend(struct device
*dev
, u32 state
, u32 level
)
1147 struct net_device
*ndev
= dev_get_drvdata(dev
);
1149 if (ndev
&& level
== SUSPEND_DISABLE
) {
1150 if (netif_running(ndev
)) {
1151 netif_device_detach(ndev
);
1152 dm9000_shutdown(ndev
);
1159 dm9000_drv_resume(struct device
*dev
, u32 level
)
1161 struct net_device
*ndev
= dev_get_drvdata(dev
);
1162 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
1164 if (ndev
&& level
== RESUME_ENABLE
) {
1166 if (netif_running(ndev
)) {
1168 dm9000_init_dm9000(ndev
);
1170 netif_device_attach(ndev
);
1177 dm9000_drv_remove(struct device
*dev
)
1179 struct platform_device
*pdev
= to_platform_device(dev
);
1180 struct net_device
*ndev
= dev_get_drvdata(dev
);
1182 dev_set_drvdata(dev
, NULL
);
1184 unregister_netdev(ndev
);
1185 dm9000_release_board(pdev
, (board_info_t
*) ndev
->priv
);
1186 kfree(ndev
); /* free device structure */
1188 PRINTK1("clean_module() exit\n");
1193 static struct device_driver dm9000_driver
= {
1195 .bus
= &platform_bus_type
,
1196 .probe
= dm9000_probe
,
1197 .remove
= dm9000_drv_remove
,
1198 .suspend
= dm9000_drv_suspend
,
1199 .resume
= dm9000_drv_resume
,
1205 return driver_register(&dm9000_driver
); /* search board and register */
1209 dm9000_cleanup(void)
1211 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");