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 /* Structure/enum declaration ------------------------------- */
106 typedef struct board_info
{
108 void __iomem
*io_addr
; /* Register I/O base address */
109 void __iomem
*io_data
; /* Data I/O address */
114 u16 queue_start_addr
;
116 u8 io_mode
; /* 0:word, 2:byte */
122 void (*inblk
)(void __iomem
*port
, void *data
, int length
);
123 void (*outblk
)(void __iomem
*port
, void *data
, int length
);
124 void (*dumpblk
)(void __iomem
*port
, int length
);
126 struct device
*dev
; /* parent device */
128 struct resource
*addr_res
; /* resources found */
129 struct resource
*data_res
;
130 struct resource
*addr_req
; /* resources requested */
131 struct resource
*data_req
;
132 struct resource
*irq_res
;
134 unsigned char srom
[128];
137 struct mii_if_info mii
;
143 #define dm9000_dbg(db, lev, msg...) do { \
144 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
145 (lev) < db->debug_level) { \
146 dev_dbg(db->dev, msg); \
150 static inline board_info_t
*to_dm9000_board(struct net_device
*dev
)
155 /* function declaration ------------------------------------- */
156 static int dm9000_probe(struct platform_device
*);
157 static int dm9000_open(struct net_device
*);
158 static int dm9000_start_xmit(struct sk_buff
*, struct net_device
*);
159 static int dm9000_stop(struct net_device
*);
161 static void dm9000_init_dm9000(struct net_device
*);
163 static irqreturn_t
dm9000_interrupt(int, void *);
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 dev_dbg(db
->dev
, "resetting device\n");
184 writeb(DM9000_NCR
, db
->io_addr
);
186 writeb(NCR_RST
, db
->io_data
);
191 * Read a byte from I/O port
194 ior(board_info_t
* db
, int reg
)
196 writeb(reg
, db
->io_addr
);
197 return readb(db
->io_data
);
201 * Write a byte to I/O port
205 iow(board_info_t
* db
, int reg
, int value
)
207 writeb(reg
, db
->io_addr
);
208 writeb(value
, db
->io_data
);
211 /* routines for sending block to chip */
213 static void dm9000_outblk_8bit(void __iomem
*reg
, void *data
, int count
)
215 writesb(reg
, data
, count
);
218 static void dm9000_outblk_16bit(void __iomem
*reg
, void *data
, int count
)
220 writesw(reg
, data
, (count
+1) >> 1);
223 static void dm9000_outblk_32bit(void __iomem
*reg
, void *data
, int count
)
225 writesl(reg
, data
, (count
+3) >> 2);
228 /* input block from chip to memory */
230 static void dm9000_inblk_8bit(void __iomem
*reg
, void *data
, int count
)
232 readsb(reg
, data
, count
);
236 static void dm9000_inblk_16bit(void __iomem
*reg
, void *data
, int count
)
238 readsw(reg
, data
, (count
+1) >> 1);
241 static void dm9000_inblk_32bit(void __iomem
*reg
, void *data
, int count
)
243 readsl(reg
, data
, (count
+3) >> 2);
246 /* dump block from chip to null */
248 static void dm9000_dumpblk_8bit(void __iomem
*reg
, int count
)
253 for (i
= 0; i
< count
; i
++)
257 static void dm9000_dumpblk_16bit(void __iomem
*reg
, int count
)
262 count
= (count
+ 1) >> 1;
264 for (i
= 0; i
< count
; i
++)
268 static void dm9000_dumpblk_32bit(void __iomem
*reg
, int count
)
273 count
= (count
+ 3) >> 2;
275 for (i
= 0; i
< count
; i
++)
281 * select the specified set of io routines to use with the
285 static void dm9000_set_io(struct board_info
*db
, int byte_width
)
287 /* use the size of the data resource to work out what IO
288 * routines we want to use
291 switch (byte_width
) {
293 db
->dumpblk
= dm9000_dumpblk_8bit
;
294 db
->outblk
= dm9000_outblk_8bit
;
295 db
->inblk
= dm9000_inblk_8bit
;
300 dev_dbg(db
->dev
, ": 3 byte IO, falling back to 16bit\n");
302 db
->dumpblk
= dm9000_dumpblk_16bit
;
303 db
->outblk
= dm9000_outblk_16bit
;
304 db
->inblk
= dm9000_inblk_16bit
;
309 db
->dumpblk
= dm9000_dumpblk_32bit
;
310 db
->outblk
= dm9000_outblk_32bit
;
311 db
->inblk
= dm9000_inblk_32bit
;
317 /* Our watchdog timed out. Called by the networking layer */
318 static void dm9000_timeout(struct net_device
*dev
)
320 board_info_t
*db
= (board_info_t
*) dev
->priv
;
324 /* Save previous register address */
325 reg_save
= readb(db
->io_addr
);
326 spin_lock_irqsave(&db
->lock
,flags
);
328 netif_stop_queue(dev
);
330 dm9000_init_dm9000(dev
);
331 /* We can accept TX packets again */
332 dev
->trans_start
= jiffies
;
333 netif_wake_queue(dev
);
335 /* Restore previous register address */
336 writeb(reg_save
, db
->io_addr
);
337 spin_unlock_irqrestore(&db
->lock
,flags
);
340 #ifdef CONFIG_NET_POLL_CONTROLLER
344 static void dm9000_poll_controller(struct net_device
*dev
)
346 disable_irq(dev
->irq
);
347 dm9000_interrupt(dev
->irq
,dev
);
348 enable_irq(dev
->irq
);
354 static void dm9000_get_drvinfo(struct net_device
*dev
,
355 struct ethtool_drvinfo
*info
)
357 board_info_t
*dm
= to_dm9000_board(dev
);
359 strcpy(info
->driver
, CARDNAME
);
360 strcpy(info
->version
, DRV_VERSION
);
361 strcpy(info
->bus_info
, to_platform_device(dm
->dev
)->name
);
364 static int dm9000_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
366 board_info_t
*dm
= to_dm9000_board(dev
);
369 spin_lock_irqsave(&dm
->lock
, flags
);
370 mii_ethtool_gset(&dm
->mii
, cmd
);
371 spin_lock_irqsave(&dm
->lock
, flags
);
376 static int dm9000_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
378 board_info_t
*dm
= to_dm9000_board(dev
);
382 spin_lock_irqsave(&dm
->lock
, flags
);
383 rc
= mii_ethtool_sset(&dm
->mii
, cmd
);
384 spin_lock_irqsave(&dm
->lock
, flags
);
389 static int dm9000_nway_reset(struct net_device
*dev
)
391 board_info_t
*dm
= to_dm9000_board(dev
);
392 return mii_nway_restart(&dm
->mii
);
395 static u32
dm9000_get_link(struct net_device
*dev
)
397 board_info_t
*dm
= to_dm9000_board(dev
);
398 return mii_link_ok(&dm
->mii
);
401 static const struct ethtool_ops dm9000_ethtool_ops
= {
402 .get_drvinfo
= dm9000_get_drvinfo
,
403 .get_settings
= dm9000_get_settings
,
404 .set_settings
= dm9000_set_settings
,
405 .nway_reset
= dm9000_nway_reset
,
406 .get_link
= dm9000_get_link
,
410 /* dm9000_release_board
412 * release a board, and any mapped resources
416 dm9000_release_board(struct platform_device
*pdev
, struct board_info
*db
)
418 if (db
->data_res
== NULL
) {
419 if (db
->addr_res
!= NULL
)
420 release_mem_region((unsigned long)db
->io_addr
, 4);
424 /* unmap our resources */
426 iounmap(db
->io_addr
);
427 iounmap(db
->io_data
);
429 /* release the resources */
431 if (db
->data_req
!= NULL
) {
432 release_resource(db
->data_req
);
436 if (db
->addr_req
!= NULL
) {
437 release_resource(db
->addr_req
);
442 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
445 * Search DM9000 board, allocate space and register it
448 dm9000_probe(struct platform_device
*pdev
)
450 struct dm9000_plat_data
*pdata
= pdev
->dev
.platform_data
;
451 struct board_info
*db
; /* Point a board information structure */
452 struct net_device
*ndev
;
459 /* Init network device */
460 ndev
= alloc_etherdev(sizeof (struct board_info
));
462 dev_err(&pdev
->dev
, "could not allocate device.\n");
466 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
468 dev_dbg(&pdev
->dev
, "dm9000_probe()");
470 /* setup board info structure */
471 db
= (struct board_info
*) ndev
->priv
;
472 memset(db
, 0, sizeof (*db
));
474 db
->dev
= &pdev
->dev
;
476 spin_lock_init(&db
->lock
);
478 if (pdev
->num_resources
< 2) {
481 } else if (pdev
->num_resources
== 2) {
482 base
= pdev
->resource
[0].start
;
484 if (!request_mem_region(base
, 4, ndev
->name
)) {
489 ndev
->base_addr
= base
;
490 ndev
->irq
= pdev
->resource
[1].start
;
491 db
->io_addr
= (void __iomem
*)base
;
492 db
->io_data
= (void __iomem
*)(base
+ 4);
494 /* ensure at least we have a default set of IO routines */
495 dm9000_set_io(db
, 2);
498 db
->addr_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
499 db
->data_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
500 db
->irq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
502 if (db
->addr_res
== NULL
|| db
->data_res
== NULL
||
503 db
->irq_res
== NULL
) {
504 dev_err(db
->dev
, "insufficient resources\n");
509 i
= res_size(db
->addr_res
);
510 db
->addr_req
= request_mem_region(db
->addr_res
->start
, i
,
513 if (db
->addr_req
== NULL
) {
514 dev_err(db
->dev
, "cannot claim address reg area\n");
519 db
->io_addr
= ioremap(db
->addr_res
->start
, i
);
521 if (db
->io_addr
== NULL
) {
522 dev_err(db
->dev
, "failed to ioremap address reg\n");
527 iosize
= res_size(db
->data_res
);
528 db
->data_req
= request_mem_region(db
->data_res
->start
, iosize
,
531 if (db
->data_req
== NULL
) {
532 dev_err(db
->dev
, "cannot claim data reg area\n");
537 db
->io_data
= ioremap(db
->data_res
->start
, iosize
);
539 if (db
->io_data
== NULL
) {
540 dev_err(db
->dev
,"failed to ioremap data reg\n");
545 /* fill in parameters for net-dev structure */
547 ndev
->base_addr
= (unsigned long)db
->io_addr
;
548 ndev
->irq
= db
->irq_res
->start
;
550 /* ensure at least we have a default set of IO routines */
551 dm9000_set_io(db
, iosize
);
554 /* check to see if anything is being over-ridden */
556 /* check to see if the driver wants to over-ride the
557 * default IO width */
559 if (pdata
->flags
& DM9000_PLATF_8BITONLY
)
560 dm9000_set_io(db
, 1);
562 if (pdata
->flags
& DM9000_PLATF_16BITONLY
)
563 dm9000_set_io(db
, 2);
565 if (pdata
->flags
& DM9000_PLATF_32BITONLY
)
566 dm9000_set_io(db
, 4);
568 /* check to see if there are any IO routine
571 if (pdata
->inblk
!= NULL
)
572 db
->inblk
= pdata
->inblk
;
574 if (pdata
->outblk
!= NULL
)
575 db
->outblk
= pdata
->outblk
;
577 if (pdata
->dumpblk
!= NULL
)
578 db
->dumpblk
= pdata
->dumpblk
;
580 db
->flags
= pdata
->flags
;
585 /* try two times, DM9000 sometimes gets the first read wrong */
586 for (i
= 0; i
< 2; i
++) {
587 id_val
= ior(db
, DM9000_VIDL
);
588 id_val
|= (u32
)ior(db
, DM9000_VIDH
) << 8;
589 id_val
|= (u32
)ior(db
, DM9000_PIDL
) << 16;
590 id_val
|= (u32
)ior(db
, DM9000_PIDH
) << 24;
592 if (id_val
== DM9000_ID
)
594 dev_err(db
->dev
, "read wrong id 0x%08x\n", id_val
);
597 if (id_val
!= DM9000_ID
) {
598 dev_err(db
->dev
, "wrong id: 0x%08x\n", id_val
);
603 /* from this point we assume that we have found a DM9000 */
605 /* driver system function */
608 ndev
->open
= &dm9000_open
;
609 ndev
->hard_start_xmit
= &dm9000_start_xmit
;
610 ndev
->tx_timeout
= &dm9000_timeout
;
611 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
612 ndev
->stop
= &dm9000_stop
;
613 ndev
->set_multicast_list
= &dm9000_hash_table
;
614 ndev
->ethtool_ops
= &dm9000_ethtool_ops
;
616 #ifdef CONFIG_NET_POLL_CONTROLLER
617 ndev
->poll_controller
= &dm9000_poll_controller
;
620 #ifdef DM9000_PROGRAM_EEPROM
623 db
->msg_enable
= NETIF_MSG_LINK
;
624 db
->mii
.phy_id_mask
= 0x1f;
625 db
->mii
.reg_num_mask
= 0x1f;
626 db
->mii
.force_media
= 0;
627 db
->mii
.full_duplex
= 0;
629 db
->mii
.mdio_read
= dm9000_phy_read
;
630 db
->mii
.mdio_write
= dm9000_phy_write
;
632 /* Read SROM content */
633 for (i
= 0; i
< 64; i
++)
634 ((u16
*) db
->srom
)[i
] = read_srom_word(db
, i
);
636 /* Set Node Address */
637 for (i
= 0; i
< 6; i
++)
638 ndev
->dev_addr
[i
] = db
->srom
[i
];
640 if (!is_valid_ether_addr(ndev
->dev_addr
)) {
641 /* try reading from mac */
643 for (i
= 0; i
< 6; i
++)
644 ndev
->dev_addr
[i
] = ior(db
, i
+DM9000_PAR
);
647 if (!is_valid_ether_addr(ndev
->dev_addr
))
648 dev_warn(db
->dev
, "%s: Invalid ethernet MAC address. Please "
649 "set using ifconfig\n", ndev
->name
);
651 platform_set_drvdata(pdev
, ndev
);
652 ret
= register_netdev(ndev
);
655 DECLARE_MAC_BUF(mac
);
656 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
657 ndev
->name
, db
->io_addr
, db
->io_data
, ndev
->irq
,
658 print_mac(mac
, ndev
->dev_addr
));
663 dev_err(db
->dev
, "not found (%d).\n", ret
);
665 dm9000_release_board(pdev
, db
);
672 * Open the interface.
673 * The interface is opened whenever "ifconfig" actives it.
676 dm9000_open(struct net_device
*dev
)
678 board_info_t
*db
= (board_info_t
*) dev
->priv
;
679 unsigned long irqflags
= db
->irq_res
->flags
& IRQF_TRIGGER_MASK
;
681 dev_dbg(db
->dev
, "entering %s\n", __func__
);
683 /* If there is no IRQ type specified, default to something that
684 * may work, and tell the user that this is a problem */
686 if (irqflags
== IRQF_TRIGGER_NONE
) {
687 dev_warn(db
->dev
, "WARNING: no IRQ resource flags set.\n");
688 irqflags
= DEFAULT_TRIGGER
;
691 irqflags
|= IRQF_SHARED
;
693 if (request_irq(dev
->irq
, &dm9000_interrupt
, irqflags
, dev
->name
, dev
))
696 /* Initialize DM9000 board */
698 dm9000_init_dm9000(dev
);
700 /* Init driver variable */
703 mii_check_media(&db
->mii
, netif_msg_link(db
), 1);
704 netif_start_queue(dev
);
710 * Initilize dm9000 board
713 dm9000_init_dm9000(struct net_device
*dev
)
715 board_info_t
*db
= (board_info_t
*) dev
->priv
;
717 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
720 db
->io_mode
= ior(db
, DM9000_ISR
) >> 6; /* ISR bit7:6 keeps I/O mode */
722 /* GPIO0 on pre-activate PHY */
723 iow(db
, DM9000_GPR
, 0); /* REG_1F bit0 activate phyxcer */
724 iow(db
, DM9000_GPCR
, GPCR_GEP_CNTL
); /* Let GPIO0 output */
725 iow(db
, DM9000_GPR
, 0); /* Enable PHY */
727 if (db
->flags
& DM9000_PLATF_EXT_PHY
)
728 iow(db
, DM9000_NCR
, NCR_EXT_PHY
);
730 /* Program operating register */
731 iow(db
, DM9000_TCR
, 0); /* TX Polling clear */
732 iow(db
, DM9000_BPTR
, 0x3f); /* Less 3Kb, 200us */
733 iow(db
, DM9000_FCR
, 0xff); /* Flow Control */
734 iow(db
, DM9000_SMCR
, 0); /* Special Mode */
735 /* clear TX status */
736 iow(db
, DM9000_NSR
, NSR_WAKEST
| NSR_TX2END
| NSR_TX1END
);
737 iow(db
, DM9000_ISR
, ISR_CLR_STATUS
); /* Clear interrupt status */
739 /* Set address filter table */
740 dm9000_hash_table(dev
);
742 /* Activate DM9000 */
743 iow(db
, DM9000_RCR
, RCR_DIS_LONG
| RCR_DIS_CRC
| RCR_RXEN
);
744 /* Enable TX/RX interrupt mask */
745 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
747 /* Init Driver variable */
749 db
->queue_pkt_len
= 0;
750 dev
->trans_start
= 0;
754 * Hardware start transmission.
755 * Send a packet to media from the upper layer.
758 dm9000_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
761 board_info_t
*db
= (board_info_t
*) dev
->priv
;
763 dm9000_dbg(db
, 3, "%s:\n", __func__
);
765 if (db
->tx_pkt_cnt
> 1)
768 spin_lock_irqsave(&db
->lock
, flags
);
770 /* Move data to DM9000 TX RAM */
771 writeb(DM9000_MWCMD
, db
->io_addr
);
773 (db
->outblk
)(db
->io_data
, skb
->data
, skb
->len
);
774 dev
->stats
.tx_bytes
+= skb
->len
;
777 /* TX control: First packet immediately send, second packet queue */
778 if (db
->tx_pkt_cnt
== 1) {
779 /* Set TX length to DM9000 */
780 iow(db
, DM9000_TXPLL
, skb
->len
& 0xff);
781 iow(db
, DM9000_TXPLH
, (skb
->len
>> 8) & 0xff);
783 /* Issue TX polling command */
784 iow(db
, DM9000_TCR
, TCR_TXREQ
); /* Cleared after TX complete */
786 dev
->trans_start
= jiffies
; /* save the time stamp */
789 db
->queue_pkt_len
= skb
->len
;
790 netif_stop_queue(dev
);
793 spin_unlock_irqrestore(&db
->lock
, flags
);
802 dm9000_shutdown(struct net_device
*dev
)
804 board_info_t
*db
= (board_info_t
*) dev
->priv
;
807 dm9000_phy_write(dev
, 0, MII_BMCR
, BMCR_RESET
); /* PHY RESET */
808 iow(db
, DM9000_GPR
, 0x01); /* Power-Down PHY */
809 iow(db
, DM9000_IMR
, IMR_PAR
); /* Disable all interrupt */
810 iow(db
, DM9000_RCR
, 0x00); /* Disable RX */
814 * Stop the interface.
815 * The interface is stopped when it is brought.
818 dm9000_stop(struct net_device
*ndev
)
820 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
822 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
824 netif_stop_queue(ndev
);
825 netif_carrier_off(ndev
);
828 free_irq(ndev
->irq
, ndev
);
830 dm9000_shutdown(ndev
);
836 * DM9000 interrupt handler
837 * receive the packet to upper layer, free the transmitted packet
841 dm9000_tx_done(struct net_device
*dev
, board_info_t
* db
)
843 int tx_status
= ior(db
, DM9000_NSR
); /* Got TX status */
845 if (tx_status
& (NSR_TX2END
| NSR_TX1END
)) {
846 /* One packet sent complete */
848 dev
->stats
.tx_packets
++;
850 /* Queue packet check & send */
851 if (db
->tx_pkt_cnt
> 0) {
852 iow(db
, DM9000_TXPLL
, db
->queue_pkt_len
& 0xff);
853 iow(db
, DM9000_TXPLH
, (db
->queue_pkt_len
>> 8) & 0xff);
854 iow(db
, DM9000_TCR
, TCR_TXREQ
);
855 dev
->trans_start
= jiffies
;
857 netif_wake_queue(dev
);
862 dm9000_interrupt(int irq
, void *dev_id
)
864 struct net_device
*dev
= dev_id
;
865 board_info_t
*db
= (board_info_t
*) dev
->priv
;
869 dm9000_dbg(db
, 3, "entering %s\n", __func__
);
871 /* A real interrupt coming */
873 spin_lock(&db
->lock
);
875 /* Save previous register address */
876 reg_save
= readb(db
->io_addr
);
878 /* Disable all interrupts */
879 iow(db
, DM9000_IMR
, IMR_PAR
);
881 /* Got DM9000 interrupt status */
882 int_status
= ior(db
, DM9000_ISR
); /* Got ISR */
883 iow(db
, DM9000_ISR
, int_status
); /* Clear ISR status */
885 /* Received the coming packet */
886 if (int_status
& ISR_PRS
)
889 /* Trnasmit Interrupt check */
890 if (int_status
& ISR_PTS
)
891 dm9000_tx_done(dev
, db
);
893 /* Re-enable interrupt mask */
894 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
896 /* Restore previous register address */
897 writeb(reg_save
, db
->io_addr
);
899 spin_unlock(&db
->lock
);
904 struct dm9000_rxhdr
{
908 } __attribute__((__packed__
));
911 * Received a packet and pass to upper layer
914 dm9000_rx(struct net_device
*dev
)
916 board_info_t
*db
= (board_info_t
*) dev
->priv
;
917 struct dm9000_rxhdr rxhdr
;
923 /* Check packet ready or not */
925 ior(db
, DM9000_MRCMDX
); /* Dummy read */
927 /* Get most updated data */
928 rxbyte
= readb(db
->io_data
);
930 /* Status check: this byte must be 0 or 1 */
931 if (rxbyte
> DM9000_PKT_RDY
) {
932 dev_warn(db
->dev
, "status check fail: %d\n", rxbyte
);
933 iow(db
, DM9000_RCR
, 0x00); /* Stop Device */
934 iow(db
, DM9000_ISR
, IMR_PAR
); /* Stop INT request */
938 if (rxbyte
!= DM9000_PKT_RDY
)
941 /* A packet ready now & Get status/length */
943 writeb(DM9000_MRCMD
, db
->io_addr
);
945 (db
->inblk
)(db
->io_data
, &rxhdr
, sizeof(rxhdr
));
947 RxLen
= le16_to_cpu(rxhdr
.RxLen
);
949 /* Packet Status check */
952 dev_dbg(db
->dev
, "Bad Packet received (runt)\n");
955 if (RxLen
> DM9000_PKT_MAX
) {
956 dev_dbg(db
->dev
, "RST: RX Len:%x\n", RxLen
);
959 if (rxhdr
.RxStatus
& 0xbf) {
961 if (rxhdr
.RxStatus
& 0x01) {
962 dev_dbg(db
->dev
, "fifo error\n");
963 dev
->stats
.rx_fifo_errors
++;
965 if (rxhdr
.RxStatus
& 0x02) {
966 dev_dbg(db
->dev
, "crc error\n");
967 dev
->stats
.rx_crc_errors
++;
969 if (rxhdr
.RxStatus
& 0x80) {
970 dev_dbg(db
->dev
, "length error\n");
971 dev
->stats
.rx_length_errors
++;
975 /* Move data from DM9000 */
977 && ((skb
= dev_alloc_skb(RxLen
+ 4)) != NULL
)) {
979 rdptr
= (u8
*) skb_put(skb
, RxLen
- 4);
981 /* Read received packet from RX SRAM */
983 (db
->inblk
)(db
->io_data
, rdptr
, RxLen
);
984 dev
->stats
.rx_bytes
+= RxLen
;
986 /* Pass to upper layer */
987 skb
->protocol
= eth_type_trans(skb
, dev
);
989 dev
->stats
.rx_packets
++;
992 /* need to dump the packet's data */
994 (db
->dumpblk
)(db
->io_data
, RxLen
);
996 } while (rxbyte
== DM9000_PKT_RDY
);
1000 * Read a word data from SROM
1003 read_srom_word(board_info_t
* db
, int offset
)
1005 iow(db
, DM9000_EPAR
, offset
);
1006 iow(db
, DM9000_EPCR
, EPCR_ERPRR
);
1007 mdelay(8); /* according to the datasheet 200us should be enough,
1008 but it doesn't work */
1009 iow(db
, DM9000_EPCR
, 0x0);
1010 return (ior(db
, DM9000_EPDRL
) + (ior(db
, DM9000_EPDRH
) << 8));
1013 #ifdef DM9000_PROGRAM_EEPROM
1015 * Write a word data to SROM
1018 write_srom_word(board_info_t
* db
, int offset
, u16 val
)
1020 iow(db
, DM9000_EPAR
, offset
);
1021 iow(db
, DM9000_EPDRH
, ((val
>> 8) & 0xff));
1022 iow(db
, DM9000_EPDRL
, (val
& 0xff));
1023 iow(db
, DM9000_EPCR
, EPCR_WEP
| EPCR_ERPRW
);
1024 mdelay(8); /* same shit */
1025 iow(db
, DM9000_EPCR
, 0);
1029 * Only for development:
1030 * Here we write static data to the eeprom in case
1031 * we don't have valid content on a new board
1034 program_eeprom(board_info_t
* db
)
1036 u16 eeprom
[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1037 0x0000, /* Autoload: accept nothing */
1038 0x0a46, 0x9000, /* Vendor / Product ID */
1039 0x0000, /* pin control */
1041 }; /* Wake-up mode control */
1043 for (i
= 0; i
< 8; i
++)
1044 write_srom_word(db
, i
, eeprom
[i
]);
1050 * Calculate the CRC valude of the Rx packet
1051 * flag = 1 : return the reverse CRC (for the received packet CRC)
1052 * 0 : return the normal CRC (for Hash Table index)
1055 static unsigned long
1056 cal_CRC(unsigned char *Data
, unsigned int Len
, u8 flag
)
1059 u32 crc
= ether_crc_le(Len
, Data
);
1068 * Set DM9000 multicast address
1071 dm9000_hash_table(struct net_device
*dev
)
1073 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1074 struct dev_mc_list
*mcptr
= dev
->mc_list
;
1075 int mc_cnt
= dev
->mc_count
;
1077 u16 i
, oft
, hash_table
[4];
1078 unsigned long flags
;
1080 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
1082 spin_lock_irqsave(&db
->lock
,flags
);
1084 for (i
= 0, oft
= 0x10; i
< 6; i
++, oft
++)
1085 iow(db
, oft
, dev
->dev_addr
[i
]);
1087 /* Clear Hash Table */
1088 for (i
= 0; i
< 4; i
++)
1089 hash_table
[i
] = 0x0;
1091 /* broadcast address */
1092 hash_table
[3] = 0x8000;
1094 /* the multicast address in Hash Table : 64 bits */
1095 for (i
= 0; i
< mc_cnt
; i
++, mcptr
= mcptr
->next
) {
1096 hash_val
= cal_CRC((char *) mcptr
->dmi_addr
, 6, 0) & 0x3f;
1097 hash_table
[hash_val
/ 16] |= (u16
) 1 << (hash_val
% 16);
1100 /* Write the hash table to MAC MD table */
1101 for (i
= 0, oft
= 0x16; i
< 4; i
++) {
1102 iow(db
, oft
++, hash_table
[i
] & 0xff);
1103 iow(db
, oft
++, (hash_table
[i
] >> 8) & 0xff);
1106 spin_unlock_irqrestore(&db
->lock
,flags
);
1111 * Read a word from phyxcer
1114 dm9000_phy_read(struct net_device
*dev
, int phy_reg_unused
, int reg
)
1116 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1117 unsigned long flags
;
1118 unsigned int 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 iow(db
, DM9000_EPCR
, 0xc); /* Issue phyxcer read command */
1131 writeb(reg_save
, db
->io_addr
);
1132 spin_unlock_irqrestore(&db
->lock
,flags
);
1134 udelay(100); /* Wait read complete */
1136 spin_lock_irqsave(&db
->lock
,flags
);
1137 reg_save
= readb(db
->io_addr
);
1139 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer read command */
1141 /* The read data keeps on REG_0D & REG_0E */
1142 ret
= (ior(db
, DM9000_EPDRH
) << 8) | ior(db
, DM9000_EPDRL
);
1144 /* restore the previous address */
1145 writeb(reg_save
, db
->io_addr
);
1146 spin_unlock_irqrestore(&db
->lock
,flags
);
1152 * Write a word to phyxcer
1155 dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
, int value
)
1157 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1158 unsigned long flags
;
1159 unsigned long reg_save
;
1161 spin_lock_irqsave(&db
->lock
,flags
);
1163 /* Save previous register address */
1164 reg_save
= readb(db
->io_addr
);
1166 /* Fill the phyxcer register into REG_0C */
1167 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1169 /* Fill the written data into REG_0D & REG_0E */
1170 iow(db
, DM9000_EPDRL
, (value
& 0xff));
1171 iow(db
, DM9000_EPDRH
, ((value
>> 8) & 0xff));
1173 iow(db
, DM9000_EPCR
, 0xa); /* Issue phyxcer write command */
1175 writeb(reg_save
, db
->io_addr
);
1176 spin_unlock_irqrestore(&db
->lock
,flags
);
1178 udelay(500); /* Wait write complete */
1180 spin_lock_irqsave(&db
->lock
,flags
);
1181 reg_save
= readb(db
->io_addr
);
1183 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer write command */
1185 /* restore the previous address */
1186 writeb(reg_save
, db
->io_addr
);
1188 spin_unlock_irqrestore(&db
->lock
,flags
);
1192 dm9000_drv_suspend(struct platform_device
*dev
, pm_message_t state
)
1194 struct net_device
*ndev
= platform_get_drvdata(dev
);
1197 if (netif_running(ndev
)) {
1198 netif_device_detach(ndev
);
1199 dm9000_shutdown(ndev
);
1206 dm9000_drv_resume(struct platform_device
*dev
)
1208 struct net_device
*ndev
= platform_get_drvdata(dev
);
1209 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
1213 if (netif_running(ndev
)) {
1215 dm9000_init_dm9000(ndev
);
1217 netif_device_attach(ndev
);
1224 dm9000_drv_remove(struct platform_device
*pdev
)
1226 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1228 platform_set_drvdata(pdev
, NULL
);
1230 unregister_netdev(ndev
);
1231 dm9000_release_board(pdev
, (board_info_t
*) ndev
->priv
);
1232 free_netdev(ndev
); /* free device structure */
1234 dev_dbg(&pdev
->dev
, "released and freed device\n");
1238 static struct platform_driver dm9000_driver
= {
1241 .owner
= THIS_MODULE
,
1243 .probe
= dm9000_probe
,
1244 .remove
= dm9000_drv_remove
,
1245 .suspend
= dm9000_drv_suspend
,
1246 .resume
= dm9000_drv_resume
,
1252 printk(KERN_INFO
"%s Ethernet Driver, V%s\n", CARDNAME
, DRV_VERSION
);
1254 return platform_driver_register(&dm9000_driver
); /* search board and register */
1258 dm9000_cleanup(void)
1260 platform_driver_unregister(&dm9000_driver
);
1263 module_init(dm9000_init
);
1264 module_exit(dm9000_cleanup
);
1266 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1267 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1268 MODULE_LICENSE("GPL");