2 * dm9000.c: Version 1.2 03/18/2003
4 * A Davicom DM9000 ISA NIC fast Ethernet driver for Linux.
5 * Copyright (C) 1997 Sten Wang
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * (C)Copyright 1997-1998 DAVICOM Semiconductor,Inc. All Rights Reserved.
19 * V0.11 06/20/2001 REG_0A bit3=1, default enable BP with DA match
20 * 06/22/2001 Support DM9801 progrmming
21 * E3: R25 = ((R24 + NF) & 0x00ff) | 0xf000
22 * E4: R25 = ((R24 + NF) & 0x00ff) | 0xc200
23 * R17 = (R17 & 0xfff0) | NF + 3
24 * E5: R25 = ((R24 + NF - 3) & 0x00ff) | 0xc200
25 * R17 = (R17 & 0xfff0) | NF
27 * v1.00 modify by simon 2001.9.5
28 * change for kernel 2.4.x
30 * v1.1 11/09/2001 fix force mode bug
32 * v1.2 03/18/2003 Weilun Huang <weilun_huang@davicom.com.tw>:
34 * Added tx/rx 32 bit mode.
35 * Cleaned up for kernel merge.
37 * 03/03/2004 Sascha Hauer <s.hauer@pengutronix.de>
40 * 24-Sep-2004 Ben Dooks <ben@simtec.co.uk>
41 * Cleanup of code to remove ifdefs
42 * Allowed platform device data to influence access width
43 * Reformatting areas of code
45 * 17-Mar-2005 Sascha Hauer <s.hauer@pengutronix.de>
46 * * removed 2.4 style module parameters
47 * * removed removed unused stat counter and fixed
49 * * introduced tx_timeout function
52 * 01-Jul-2005 Ben Dooks <ben@simtec.co.uk>
53 * * fixed spinlock call without pointer
54 * * ensure spinlock is initialised
57 #include <linux/module.h>
58 #include <linux/ioport.h>
59 #include <linux/netdevice.h>
60 #include <linux/etherdevice.h>
61 #include <linux/init.h>
62 #include <linux/skbuff.h>
63 #include <linux/spinlock.h>
64 #include <linux/crc32.h>
65 #include <linux/mii.h>
66 #include <linux/ethtool.h>
67 #include <linux/dm9000.h>
68 #include <linux/delay.h>
69 #include <linux/platform_device.h>
70 #include <linux/irq.h>
72 #include <asm/delay.h>
78 /* Board/System/Debug information/definition ---------------- */
80 #define DM9000_PHY 0x40 /* PHY address 0x01 */
82 #define CARDNAME "dm9000"
83 #define PFX CARDNAME ": "
84 #define DRV_VERSION "1.30"
86 #ifdef CONFIG_BLACKFIN
93 #define DEFAULT_TRIGGER IRQF_TRIGGER_HIGH
95 #define DEFAULT_TRIGGER (0)
99 * Transmit timeout, default 5 seconds.
101 static int watchdog
= 5000;
102 module_param(watchdog
, int, 0400);
103 MODULE_PARM_DESC(watchdog
, "transmit timeout in milliseconds");
105 /* DM9000 register address locking.
107 * The DM9000 uses an address register to control where data written
108 * to the data register goes. This means that the address register
109 * must be preserved over interrupts or similar calls.
111 * During interrupt and other critical calls, a spinlock is used to
112 * protect the system, but the calls themselves save the address
113 * in the address register in case they are interrupting another
114 * access to the device.
116 * For general accesses a lock is provided so that calls which are
117 * allowed to sleep are serialised so that the address register does
118 * not need to be saved. This lock also serves to serialise access
119 * to the EEPROM and PHY access registers which are shared between
123 /* Structure/enum declaration ------------------------------- */
124 typedef struct board_info
{
126 void __iomem
*io_addr
; /* Register I/O base address */
127 void __iomem
*io_data
; /* Data I/O address */
132 u16 queue_start_addr
;
134 u8 io_mode
; /* 0:word, 2:byte */
137 unsigned int in_suspend
:1;
141 void (*inblk
)(void __iomem
*port
, void *data
, int length
);
142 void (*outblk
)(void __iomem
*port
, void *data
, int length
);
143 void (*dumpblk
)(void __iomem
*port
, int length
);
145 struct device
*dev
; /* parent device */
147 struct resource
*addr_res
; /* resources found */
148 struct resource
*data_res
;
149 struct resource
*addr_req
; /* resources requested */
150 struct resource
*data_req
;
151 struct resource
*irq_res
;
153 struct mutex addr_lock
; /* phy and eeprom access lock */
157 struct mii_if_info mii
;
163 #define dm9000_dbg(db, lev, msg...) do { \
164 if ((lev) < CONFIG_DM9000_DEBUGLEVEL && \
165 (lev) < db->debug_level) { \
166 dev_dbg(db->dev, msg); \
170 static inline board_info_t
*to_dm9000_board(struct net_device
*dev
)
175 /* function declaration ------------------------------------- */
176 static int dm9000_probe(struct platform_device
*);
177 static int dm9000_open(struct net_device
*);
178 static int dm9000_start_xmit(struct sk_buff
*, struct net_device
*);
179 static int dm9000_stop(struct net_device
*);
181 static void dm9000_init_dm9000(struct net_device
*);
183 static irqreturn_t
dm9000_interrupt(int, void *);
185 static int dm9000_phy_read(struct net_device
*dev
, int phyaddr_unsused
, int reg
);
186 static void dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
,
189 static void dm9000_read_eeprom(board_info_t
*, int addr
, unsigned char *to
);
190 static void dm9000_rx(struct net_device
*);
191 static void dm9000_hash_table(struct net_device
*);
193 //#define DM9000_PROGRAM_EEPROM
194 #ifdef DM9000_PROGRAM_EEPROM
195 static void program_eeprom(board_info_t
* db
);
197 /* DM9000 network board routine ---------------------------- */
200 dm9000_reset(board_info_t
* db
)
202 dev_dbg(db
->dev
, "resetting device\n");
205 writeb(DM9000_NCR
, db
->io_addr
);
207 writeb(NCR_RST
, db
->io_data
);
212 * Read a byte from I/O port
215 ior(board_info_t
* db
, int reg
)
217 writeb(reg
, db
->io_addr
);
218 return readb(db
->io_data
);
222 * Write a byte to I/O port
226 iow(board_info_t
* db
, int reg
, int value
)
228 writeb(reg
, db
->io_addr
);
229 writeb(value
, db
->io_data
);
232 /* routines for sending block to chip */
234 static void dm9000_outblk_8bit(void __iomem
*reg
, void *data
, int count
)
236 writesb(reg
, data
, count
);
239 static void dm9000_outblk_16bit(void __iomem
*reg
, void *data
, int count
)
241 writesw(reg
, data
, (count
+1) >> 1);
244 static void dm9000_outblk_32bit(void __iomem
*reg
, void *data
, int count
)
246 writesl(reg
, data
, (count
+3) >> 2);
249 /* input block from chip to memory */
251 static void dm9000_inblk_8bit(void __iomem
*reg
, void *data
, int count
)
253 readsb(reg
, data
, count
);
257 static void dm9000_inblk_16bit(void __iomem
*reg
, void *data
, int count
)
259 readsw(reg
, data
, (count
+1) >> 1);
262 static void dm9000_inblk_32bit(void __iomem
*reg
, void *data
, int count
)
264 readsl(reg
, data
, (count
+3) >> 2);
267 /* dump block from chip to null */
269 static void dm9000_dumpblk_8bit(void __iomem
*reg
, int count
)
274 for (i
= 0; i
< count
; i
++)
278 static void dm9000_dumpblk_16bit(void __iomem
*reg
, int count
)
283 count
= (count
+ 1) >> 1;
285 for (i
= 0; i
< count
; i
++)
289 static void dm9000_dumpblk_32bit(void __iomem
*reg
, int count
)
294 count
= (count
+ 3) >> 2;
296 for (i
= 0; i
< count
; i
++)
302 * select the specified set of io routines to use with the
306 static void dm9000_set_io(struct board_info
*db
, int byte_width
)
308 /* use the size of the data resource to work out what IO
309 * routines we want to use
312 switch (byte_width
) {
314 db
->dumpblk
= dm9000_dumpblk_8bit
;
315 db
->outblk
= dm9000_outblk_8bit
;
316 db
->inblk
= dm9000_inblk_8bit
;
321 dev_dbg(db
->dev
, ": 3 byte IO, falling back to 16bit\n");
323 db
->dumpblk
= dm9000_dumpblk_16bit
;
324 db
->outblk
= dm9000_outblk_16bit
;
325 db
->inblk
= dm9000_inblk_16bit
;
330 db
->dumpblk
= dm9000_dumpblk_32bit
;
331 db
->outblk
= dm9000_outblk_32bit
;
332 db
->inblk
= dm9000_inblk_32bit
;
338 /* Our watchdog timed out. Called by the networking layer */
339 static void dm9000_timeout(struct net_device
*dev
)
341 board_info_t
*db
= (board_info_t
*) dev
->priv
;
345 /* Save previous register address */
346 reg_save
= readb(db
->io_addr
);
347 spin_lock_irqsave(&db
->lock
,flags
);
349 netif_stop_queue(dev
);
351 dm9000_init_dm9000(dev
);
352 /* We can accept TX packets again */
353 dev
->trans_start
= jiffies
;
354 netif_wake_queue(dev
);
356 /* Restore previous register address */
357 writeb(reg_save
, db
->io_addr
);
358 spin_unlock_irqrestore(&db
->lock
,flags
);
361 #ifdef CONFIG_NET_POLL_CONTROLLER
365 static void dm9000_poll_controller(struct net_device
*dev
)
367 disable_irq(dev
->irq
);
368 dm9000_interrupt(dev
->irq
,dev
);
369 enable_irq(dev
->irq
);
375 static void dm9000_get_drvinfo(struct net_device
*dev
,
376 struct ethtool_drvinfo
*info
)
378 board_info_t
*dm
= to_dm9000_board(dev
);
380 strcpy(info
->driver
, CARDNAME
);
381 strcpy(info
->version
, DRV_VERSION
);
382 strcpy(info
->bus_info
, to_platform_device(dm
->dev
)->name
);
385 static int dm9000_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
387 board_info_t
*dm
= to_dm9000_board(dev
);
389 mii_ethtool_gset(&dm
->mii
, cmd
);
393 static int dm9000_set_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
395 board_info_t
*dm
= to_dm9000_board(dev
);
397 return mii_ethtool_sset(&dm
->mii
, cmd
);
400 static int dm9000_nway_reset(struct net_device
*dev
)
402 board_info_t
*dm
= to_dm9000_board(dev
);
403 return mii_nway_restart(&dm
->mii
);
406 static u32
dm9000_get_link(struct net_device
*dev
)
408 board_info_t
*dm
= to_dm9000_board(dev
);
409 return mii_link_ok(&dm
->mii
);
412 static const struct ethtool_ops dm9000_ethtool_ops
= {
413 .get_drvinfo
= dm9000_get_drvinfo
,
414 .get_settings
= dm9000_get_settings
,
415 .set_settings
= dm9000_set_settings
,
416 .nway_reset
= dm9000_nway_reset
,
417 .get_link
= dm9000_get_link
,
421 /* dm9000_release_board
423 * release a board, and any mapped resources
427 dm9000_release_board(struct platform_device
*pdev
, struct board_info
*db
)
429 if (db
->data_res
== NULL
) {
430 if (db
->addr_res
!= NULL
)
431 release_mem_region((unsigned long)db
->io_addr
, 4);
435 /* unmap our resources */
437 iounmap(db
->io_addr
);
438 iounmap(db
->io_data
);
440 /* release the resources */
442 if (db
->data_req
!= NULL
) {
443 release_resource(db
->data_req
);
447 if (db
->addr_req
!= NULL
) {
448 release_resource(db
->addr_req
);
453 #define res_size(_r) (((_r)->end - (_r)->start) + 1)
456 * Search DM9000 board, allocate space and register it
459 dm9000_probe(struct platform_device
*pdev
)
461 struct dm9000_plat_data
*pdata
= pdev
->dev
.platform_data
;
462 struct board_info
*db
; /* Point a board information structure */
463 struct net_device
*ndev
;
470 /* Init network device */
471 ndev
= alloc_etherdev(sizeof (struct board_info
));
473 dev_err(&pdev
->dev
, "could not allocate device.\n");
477 SET_NETDEV_DEV(ndev
, &pdev
->dev
);
479 dev_dbg(&pdev
->dev
, "dm9000_probe()");
481 /* setup board info structure */
482 db
= (struct board_info
*) ndev
->priv
;
483 memset(db
, 0, sizeof (*db
));
485 db
->dev
= &pdev
->dev
;
487 spin_lock_init(&db
->lock
);
488 mutex_init(&db
->addr_lock
);
490 if (pdev
->num_resources
< 2) {
493 } else if (pdev
->num_resources
== 2) {
494 base
= pdev
->resource
[0].start
;
496 if (!request_mem_region(base
, 4, ndev
->name
)) {
501 ndev
->base_addr
= base
;
502 ndev
->irq
= pdev
->resource
[1].start
;
503 db
->io_addr
= (void __iomem
*)base
;
504 db
->io_data
= (void __iomem
*)(base
+ 4);
506 /* ensure at least we have a default set of IO routines */
507 dm9000_set_io(db
, 2);
510 db
->addr_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
511 db
->data_res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 1);
512 db
->irq_res
= platform_get_resource(pdev
, IORESOURCE_IRQ
, 0);
514 if (db
->addr_res
== NULL
|| db
->data_res
== NULL
||
515 db
->irq_res
== NULL
) {
516 dev_err(db
->dev
, "insufficient resources\n");
521 i
= res_size(db
->addr_res
);
522 db
->addr_req
= request_mem_region(db
->addr_res
->start
, i
,
525 if (db
->addr_req
== NULL
) {
526 dev_err(db
->dev
, "cannot claim address reg area\n");
531 db
->io_addr
= ioremap(db
->addr_res
->start
, i
);
533 if (db
->io_addr
== NULL
) {
534 dev_err(db
->dev
, "failed to ioremap address reg\n");
539 iosize
= res_size(db
->data_res
);
540 db
->data_req
= request_mem_region(db
->data_res
->start
, iosize
,
543 if (db
->data_req
== NULL
) {
544 dev_err(db
->dev
, "cannot claim data reg area\n");
549 db
->io_data
= ioremap(db
->data_res
->start
, iosize
);
551 if (db
->io_data
== NULL
) {
552 dev_err(db
->dev
,"failed to ioremap data reg\n");
557 /* fill in parameters for net-dev structure */
559 ndev
->base_addr
= (unsigned long)db
->io_addr
;
560 ndev
->irq
= db
->irq_res
->start
;
562 /* ensure at least we have a default set of IO routines */
563 dm9000_set_io(db
, iosize
);
566 /* check to see if anything is being over-ridden */
568 /* check to see if the driver wants to over-ride the
569 * default IO width */
571 if (pdata
->flags
& DM9000_PLATF_8BITONLY
)
572 dm9000_set_io(db
, 1);
574 if (pdata
->flags
& DM9000_PLATF_16BITONLY
)
575 dm9000_set_io(db
, 2);
577 if (pdata
->flags
& DM9000_PLATF_32BITONLY
)
578 dm9000_set_io(db
, 4);
580 /* check to see if there are any IO routine
583 if (pdata
->inblk
!= NULL
)
584 db
->inblk
= pdata
->inblk
;
586 if (pdata
->outblk
!= NULL
)
587 db
->outblk
= pdata
->outblk
;
589 if (pdata
->dumpblk
!= NULL
)
590 db
->dumpblk
= pdata
->dumpblk
;
592 db
->flags
= pdata
->flags
;
597 /* try two times, DM9000 sometimes gets the first read wrong */
598 for (i
= 0; i
< 2; i
++) {
599 id_val
= ior(db
, DM9000_VIDL
);
600 id_val
|= (u32
)ior(db
, DM9000_VIDH
) << 8;
601 id_val
|= (u32
)ior(db
, DM9000_PIDL
) << 16;
602 id_val
|= (u32
)ior(db
, DM9000_PIDH
) << 24;
604 if (id_val
== DM9000_ID
)
606 dev_err(db
->dev
, "read wrong id 0x%08x\n", id_val
);
609 if (id_val
!= DM9000_ID
) {
610 dev_err(db
->dev
, "wrong id: 0x%08x\n", id_val
);
615 /* from this point we assume that we have found a DM9000 */
617 /* driver system function */
620 ndev
->open
= &dm9000_open
;
621 ndev
->hard_start_xmit
= &dm9000_start_xmit
;
622 ndev
->tx_timeout
= &dm9000_timeout
;
623 ndev
->watchdog_timeo
= msecs_to_jiffies(watchdog
);
624 ndev
->stop
= &dm9000_stop
;
625 ndev
->set_multicast_list
= &dm9000_hash_table
;
626 ndev
->ethtool_ops
= &dm9000_ethtool_ops
;
628 #ifdef CONFIG_NET_POLL_CONTROLLER
629 ndev
->poll_controller
= &dm9000_poll_controller
;
632 #ifdef DM9000_PROGRAM_EEPROM
635 db
->msg_enable
= NETIF_MSG_LINK
;
636 db
->mii
.phy_id_mask
= 0x1f;
637 db
->mii
.reg_num_mask
= 0x1f;
638 db
->mii
.force_media
= 0;
639 db
->mii
.full_duplex
= 0;
641 db
->mii
.mdio_read
= dm9000_phy_read
;
642 db
->mii
.mdio_write
= dm9000_phy_write
;
644 /* try reading the node address from the attached EEPROM */
645 for (i
= 0; i
< 6; i
+= 2)
646 dm9000_read_eeprom(db
, i
/ 2, ndev
->dev_addr
+i
);
648 if (!is_valid_ether_addr(ndev
->dev_addr
)) {
649 /* try reading from mac */
651 for (i
= 0; i
< 6; i
++)
652 ndev
->dev_addr
[i
] = ior(db
, i
+DM9000_PAR
);
655 if (!is_valid_ether_addr(ndev
->dev_addr
))
656 dev_warn(db
->dev
, "%s: Invalid ethernet MAC address. Please "
657 "set using ifconfig\n", ndev
->name
);
659 platform_set_drvdata(pdev
, ndev
);
660 ret
= register_netdev(ndev
);
663 DECLARE_MAC_BUF(mac
);
664 printk("%s: dm9000 at %p,%p IRQ %d MAC: %s\n",
665 ndev
->name
, db
->io_addr
, db
->io_data
, ndev
->irq
,
666 print_mac(mac
, ndev
->dev_addr
));
671 dev_err(db
->dev
, "not found (%d).\n", ret
);
673 dm9000_release_board(pdev
, db
);
680 * Open the interface.
681 * The interface is opened whenever "ifconfig" actives it.
684 dm9000_open(struct net_device
*dev
)
686 board_info_t
*db
= (board_info_t
*) dev
->priv
;
687 unsigned long irqflags
= db
->irq_res
->flags
& IRQF_TRIGGER_MASK
;
689 dev_dbg(db
->dev
, "entering %s\n", __func__
);
691 /* If there is no IRQ type specified, default to something that
692 * may work, and tell the user that this is a problem */
694 if (irqflags
== IRQF_TRIGGER_NONE
) {
695 dev_warn(db
->dev
, "WARNING: no IRQ resource flags set.\n");
696 irqflags
= DEFAULT_TRIGGER
;
699 irqflags
|= IRQF_SHARED
;
701 if (request_irq(dev
->irq
, &dm9000_interrupt
, irqflags
, dev
->name
, dev
))
704 /* Initialize DM9000 board */
706 dm9000_init_dm9000(dev
);
708 /* Init driver variable */
711 mii_check_media(&db
->mii
, netif_msg_link(db
), 1);
712 netif_start_queue(dev
);
718 * Initilize dm9000 board
721 dm9000_init_dm9000(struct net_device
*dev
)
723 board_info_t
*db
= (board_info_t
*) dev
->priv
;
725 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
728 db
->io_mode
= ior(db
, DM9000_ISR
) >> 6; /* ISR bit7:6 keeps I/O mode */
730 /* GPIO0 on pre-activate PHY */
731 iow(db
, DM9000_GPR
, 0); /* REG_1F bit0 activate phyxcer */
732 iow(db
, DM9000_GPCR
, GPCR_GEP_CNTL
); /* Let GPIO0 output */
733 iow(db
, DM9000_GPR
, 0); /* Enable PHY */
735 if (db
->flags
& DM9000_PLATF_EXT_PHY
)
736 iow(db
, DM9000_NCR
, NCR_EXT_PHY
);
738 /* Program operating register */
739 iow(db
, DM9000_TCR
, 0); /* TX Polling clear */
740 iow(db
, DM9000_BPTR
, 0x3f); /* Less 3Kb, 200us */
741 iow(db
, DM9000_FCR
, 0xff); /* Flow Control */
742 iow(db
, DM9000_SMCR
, 0); /* Special Mode */
743 /* clear TX status */
744 iow(db
, DM9000_NSR
, NSR_WAKEST
| NSR_TX2END
| NSR_TX1END
);
745 iow(db
, DM9000_ISR
, ISR_CLR_STATUS
); /* Clear interrupt status */
747 /* Set address filter table */
748 dm9000_hash_table(dev
);
750 /* Activate DM9000 */
751 iow(db
, DM9000_RCR
, RCR_DIS_LONG
| RCR_DIS_CRC
| RCR_RXEN
);
752 /* Enable TX/RX interrupt mask */
753 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
755 /* Init Driver variable */
757 db
->queue_pkt_len
= 0;
758 dev
->trans_start
= 0;
762 * Hardware start transmission.
763 * Send a packet to media from the upper layer.
766 dm9000_start_xmit(struct sk_buff
*skb
, struct net_device
*dev
)
769 board_info_t
*db
= (board_info_t
*) dev
->priv
;
771 dm9000_dbg(db
, 3, "%s:\n", __func__
);
773 if (db
->tx_pkt_cnt
> 1)
776 spin_lock_irqsave(&db
->lock
, flags
);
778 /* Move data to DM9000 TX RAM */
779 writeb(DM9000_MWCMD
, db
->io_addr
);
781 (db
->outblk
)(db
->io_data
, skb
->data
, skb
->len
);
782 dev
->stats
.tx_bytes
+= skb
->len
;
785 /* TX control: First packet immediately send, second packet queue */
786 if (db
->tx_pkt_cnt
== 1) {
787 /* Set TX length to DM9000 */
788 iow(db
, DM9000_TXPLL
, skb
->len
& 0xff);
789 iow(db
, DM9000_TXPLH
, (skb
->len
>> 8) & 0xff);
791 /* Issue TX polling command */
792 iow(db
, DM9000_TCR
, TCR_TXREQ
); /* Cleared after TX complete */
794 dev
->trans_start
= jiffies
; /* save the time stamp */
797 db
->queue_pkt_len
= skb
->len
;
798 netif_stop_queue(dev
);
801 spin_unlock_irqrestore(&db
->lock
, flags
);
810 dm9000_shutdown(struct net_device
*dev
)
812 board_info_t
*db
= (board_info_t
*) dev
->priv
;
815 dm9000_phy_write(dev
, 0, MII_BMCR
, BMCR_RESET
); /* PHY RESET */
816 iow(db
, DM9000_GPR
, 0x01); /* Power-Down PHY */
817 iow(db
, DM9000_IMR
, IMR_PAR
); /* Disable all interrupt */
818 iow(db
, DM9000_RCR
, 0x00); /* Disable RX */
822 * Stop the interface.
823 * The interface is stopped when it is brought.
826 dm9000_stop(struct net_device
*ndev
)
828 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
830 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
832 netif_stop_queue(ndev
);
833 netif_carrier_off(ndev
);
836 free_irq(ndev
->irq
, ndev
);
838 dm9000_shutdown(ndev
);
844 * DM9000 interrupt handler
845 * receive the packet to upper layer, free the transmitted packet
849 dm9000_tx_done(struct net_device
*dev
, board_info_t
* db
)
851 int tx_status
= ior(db
, DM9000_NSR
); /* Got TX status */
853 if (tx_status
& (NSR_TX2END
| NSR_TX1END
)) {
854 /* One packet sent complete */
856 dev
->stats
.tx_packets
++;
858 /* Queue packet check & send */
859 if (db
->tx_pkt_cnt
> 0) {
860 iow(db
, DM9000_TXPLL
, db
->queue_pkt_len
& 0xff);
861 iow(db
, DM9000_TXPLH
, (db
->queue_pkt_len
>> 8) & 0xff);
862 iow(db
, DM9000_TCR
, TCR_TXREQ
);
863 dev
->trans_start
= jiffies
;
865 netif_wake_queue(dev
);
870 dm9000_interrupt(int irq
, void *dev_id
)
872 struct net_device
*dev
= dev_id
;
873 board_info_t
*db
= (board_info_t
*) dev
->priv
;
877 dm9000_dbg(db
, 3, "entering %s\n", __func__
);
879 /* A real interrupt coming */
881 spin_lock(&db
->lock
);
883 /* Save previous register address */
884 reg_save
= readb(db
->io_addr
);
886 /* Disable all interrupts */
887 iow(db
, DM9000_IMR
, IMR_PAR
);
889 /* Got DM9000 interrupt status */
890 int_status
= ior(db
, DM9000_ISR
); /* Got ISR */
891 iow(db
, DM9000_ISR
, int_status
); /* Clear ISR status */
893 /* Received the coming packet */
894 if (int_status
& ISR_PRS
)
897 /* Trnasmit Interrupt check */
898 if (int_status
& ISR_PTS
)
899 dm9000_tx_done(dev
, db
);
901 /* Re-enable interrupt mask */
902 iow(db
, DM9000_IMR
, IMR_PAR
| IMR_PTM
| IMR_PRM
);
904 /* Restore previous register address */
905 writeb(reg_save
, db
->io_addr
);
907 spin_unlock(&db
->lock
);
912 struct dm9000_rxhdr
{
916 } __attribute__((__packed__
));
919 * Received a packet and pass to upper layer
922 dm9000_rx(struct net_device
*dev
)
924 board_info_t
*db
= (board_info_t
*) dev
->priv
;
925 struct dm9000_rxhdr rxhdr
;
931 /* Check packet ready or not */
933 ior(db
, DM9000_MRCMDX
); /* Dummy read */
935 /* Get most updated data */
936 rxbyte
= readb(db
->io_data
);
938 /* Status check: this byte must be 0 or 1 */
939 if (rxbyte
> DM9000_PKT_RDY
) {
940 dev_warn(db
->dev
, "status check fail: %d\n", rxbyte
);
941 iow(db
, DM9000_RCR
, 0x00); /* Stop Device */
942 iow(db
, DM9000_ISR
, IMR_PAR
); /* Stop INT request */
946 if (rxbyte
!= DM9000_PKT_RDY
)
949 /* A packet ready now & Get status/length */
951 writeb(DM9000_MRCMD
, db
->io_addr
);
953 (db
->inblk
)(db
->io_data
, &rxhdr
, sizeof(rxhdr
));
955 RxLen
= le16_to_cpu(rxhdr
.RxLen
);
957 /* Packet Status check */
960 dev_dbg(db
->dev
, "Bad Packet received (runt)\n");
963 if (RxLen
> DM9000_PKT_MAX
) {
964 dev_dbg(db
->dev
, "RST: RX Len:%x\n", RxLen
);
967 if (rxhdr
.RxStatus
& 0xbf) {
969 if (rxhdr
.RxStatus
& 0x01) {
970 dev_dbg(db
->dev
, "fifo error\n");
971 dev
->stats
.rx_fifo_errors
++;
973 if (rxhdr
.RxStatus
& 0x02) {
974 dev_dbg(db
->dev
, "crc error\n");
975 dev
->stats
.rx_crc_errors
++;
977 if (rxhdr
.RxStatus
& 0x80) {
978 dev_dbg(db
->dev
, "length error\n");
979 dev
->stats
.rx_length_errors
++;
983 /* Move data from DM9000 */
985 && ((skb
= dev_alloc_skb(RxLen
+ 4)) != NULL
)) {
987 rdptr
= (u8
*) skb_put(skb
, RxLen
- 4);
989 /* Read received packet from RX SRAM */
991 (db
->inblk
)(db
->io_data
, rdptr
, RxLen
);
992 dev
->stats
.rx_bytes
+= RxLen
;
994 /* Pass to upper layer */
995 skb
->protocol
= eth_type_trans(skb
, dev
);
997 dev
->stats
.rx_packets
++;
1000 /* need to dump the packet's data */
1002 (db
->dumpblk
)(db
->io_data
, RxLen
);
1004 } while (rxbyte
== DM9000_PKT_RDY
);
1008 * Read a word data from EEPROM
1011 dm9000_read_eeprom(board_info_t
*db
, int offset
, unsigned char *to
)
1013 mutex_lock(&db
->addr_lock
);
1015 iow(db
, DM9000_EPAR
, offset
);
1016 iow(db
, DM9000_EPCR
, EPCR_ERPRR
);
1017 mdelay(8); /* according to the datasheet 200us should be enough,
1018 but it doesn't work */
1019 iow(db
, DM9000_EPCR
, 0x0);
1021 to
[0] = ior(db
, DM9000_EPDRL
);
1022 to
[1] = ior(db
, DM9000_EPDRH
);
1024 mutex_unlock(&db
->addr_lock
);
1027 #ifdef DM9000_PROGRAM_EEPROM
1029 * Write a word data to SROM
1032 write_srom_word(board_info_t
* db
, int offset
, u16 val
)
1034 mutex_lock(&db
->addr_lock
);
1036 iow(db
, DM9000_EPAR
, offset
);
1037 iow(db
, DM9000_EPDRH
, ((val
>> 8) & 0xff));
1038 iow(db
, DM9000_EPDRL
, (val
& 0xff));
1039 iow(db
, DM9000_EPCR
, EPCR_WEP
| EPCR_ERPRW
);
1040 mdelay(8); /* same shit */
1041 iow(db
, DM9000_EPCR
, 0);
1043 mutex_unlock(&db
->addr_lock
);
1047 * Only for development:
1048 * Here we write static data to the eeprom in case
1049 * we don't have valid content on a new board
1052 program_eeprom(board_info_t
* db
)
1054 u16 eeprom
[] = { 0x0c00, 0x007f, 0x1300, /* MAC Address */
1055 0x0000, /* Autoload: accept nothing */
1056 0x0a46, 0x9000, /* Vendor / Product ID */
1057 0x0000, /* pin control */
1059 }; /* Wake-up mode control */
1061 for (i
= 0; i
< 8; i
++)
1062 write_srom_word(db
, i
, eeprom
[i
]);
1068 * Calculate the CRC valude of the Rx packet
1069 * flag = 1 : return the reverse CRC (for the received packet CRC)
1070 * 0 : return the normal CRC (for Hash Table index)
1073 static unsigned long
1074 cal_CRC(unsigned char *Data
, unsigned int Len
, u8 flag
)
1077 u32 crc
= ether_crc_le(Len
, Data
);
1086 * Set DM9000 multicast address
1089 dm9000_hash_table(struct net_device
*dev
)
1091 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1092 struct dev_mc_list
*mcptr
= dev
->mc_list
;
1093 int mc_cnt
= dev
->mc_count
;
1095 u16 i
, oft
, hash_table
[4];
1096 unsigned long flags
;
1098 dm9000_dbg(db
, 1, "entering %s\n", __func__
);
1100 spin_lock_irqsave(&db
->lock
,flags
);
1102 for (i
= 0, oft
= 0x10; i
< 6; i
++, oft
++)
1103 iow(db
, oft
, dev
->dev_addr
[i
]);
1105 /* Clear Hash Table */
1106 for (i
= 0; i
< 4; i
++)
1107 hash_table
[i
] = 0x0;
1109 /* broadcast address */
1110 hash_table
[3] = 0x8000;
1112 /* the multicast address in Hash Table : 64 bits */
1113 for (i
= 0; i
< mc_cnt
; i
++, mcptr
= mcptr
->next
) {
1114 hash_val
= cal_CRC((char *) mcptr
->dmi_addr
, 6, 0) & 0x3f;
1115 hash_table
[hash_val
/ 16] |= (u16
) 1 << (hash_val
% 16);
1118 /* Write the hash table to MAC MD table */
1119 for (i
= 0, oft
= 0x16; i
< 4; i
++) {
1120 iow(db
, oft
++, hash_table
[i
] & 0xff);
1121 iow(db
, oft
++, (hash_table
[i
] >> 8) & 0xff);
1124 spin_unlock_irqrestore(&db
->lock
,flags
);
1129 * Sleep, either by using msleep() or if we are suspending, then
1130 * use mdelay() to sleep.
1132 static void dm9000_msleep(board_info_t
*db
, unsigned int ms
)
1141 * Read a word from phyxcer
1144 dm9000_phy_read(struct net_device
*dev
, int phy_reg_unused
, int reg
)
1146 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1147 unsigned long flags
;
1148 unsigned int reg_save
;
1151 mutex_lock(&db
->addr_lock
);
1153 spin_lock_irqsave(&db
->lock
,flags
);
1155 /* Save previous register address */
1156 reg_save
= readb(db
->io_addr
);
1158 /* Fill the phyxcer register into REG_0C */
1159 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1161 iow(db
, DM9000_EPCR
, 0xc); /* Issue phyxcer read command */
1163 writeb(reg_save
, db
->io_addr
);
1164 spin_unlock_irqrestore(&db
->lock
,flags
);
1166 dm9000_msleep(db
, 1); /* Wait read complete */
1168 spin_lock_irqsave(&db
->lock
,flags
);
1169 reg_save
= readb(db
->io_addr
);
1171 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer read command */
1173 /* The read data keeps on REG_0D & REG_0E */
1174 ret
= (ior(db
, DM9000_EPDRH
) << 8) | ior(db
, DM9000_EPDRL
);
1176 /* restore the previous address */
1177 writeb(reg_save
, db
->io_addr
);
1178 spin_unlock_irqrestore(&db
->lock
,flags
);
1180 mutex_unlock(&db
->addr_lock
);
1185 * Write a word to phyxcer
1188 dm9000_phy_write(struct net_device
*dev
, int phyaddr_unused
, int reg
, int value
)
1190 board_info_t
*db
= (board_info_t
*) dev
->priv
;
1191 unsigned long flags
;
1192 unsigned long reg_save
;
1194 mutex_lock(&db
->addr_lock
);
1196 spin_lock_irqsave(&db
->lock
,flags
);
1198 /* Save previous register address */
1199 reg_save
= readb(db
->io_addr
);
1201 /* Fill the phyxcer register into REG_0C */
1202 iow(db
, DM9000_EPAR
, DM9000_PHY
| reg
);
1204 /* Fill the written data into REG_0D & REG_0E */
1205 iow(db
, DM9000_EPDRL
, (value
& 0xff));
1206 iow(db
, DM9000_EPDRH
, ((value
>> 8) & 0xff));
1208 iow(db
, DM9000_EPCR
, 0xa); /* Issue phyxcer write command */
1210 writeb(reg_save
, db
->io_addr
);
1211 spin_unlock_irqrestore(&db
->lock
, flags
);
1213 dm9000_msleep(db
, 1); /* Wait write complete */
1215 spin_lock_irqsave(&db
->lock
,flags
);
1216 reg_save
= readb(db
->io_addr
);
1218 iow(db
, DM9000_EPCR
, 0x0); /* Clear phyxcer write command */
1220 /* restore the previous address */
1221 writeb(reg_save
, db
->io_addr
);
1223 spin_unlock_irqrestore(&db
->lock
, flags
);
1224 mutex_unlock(&db
->addr_lock
);
1228 dm9000_drv_suspend(struct platform_device
*dev
, pm_message_t state
)
1230 struct net_device
*ndev
= platform_get_drvdata(dev
);
1234 db
= (board_info_t
*) ndev
->priv
;
1237 if (netif_running(ndev
)) {
1238 netif_device_detach(ndev
);
1239 dm9000_shutdown(ndev
);
1246 dm9000_drv_resume(struct platform_device
*dev
)
1248 struct net_device
*ndev
= platform_get_drvdata(dev
);
1249 board_info_t
*db
= (board_info_t
*) ndev
->priv
;
1253 if (netif_running(ndev
)) {
1255 dm9000_init_dm9000(ndev
);
1257 netif_device_attach(ndev
);
1266 dm9000_drv_remove(struct platform_device
*pdev
)
1268 struct net_device
*ndev
= platform_get_drvdata(pdev
);
1270 platform_set_drvdata(pdev
, NULL
);
1272 unregister_netdev(ndev
);
1273 dm9000_release_board(pdev
, (board_info_t
*) ndev
->priv
);
1274 free_netdev(ndev
); /* free device structure */
1276 dev_dbg(&pdev
->dev
, "released and freed device\n");
1280 static struct platform_driver dm9000_driver
= {
1283 .owner
= THIS_MODULE
,
1285 .probe
= dm9000_probe
,
1286 .remove
= dm9000_drv_remove
,
1287 .suspend
= dm9000_drv_suspend
,
1288 .resume
= dm9000_drv_resume
,
1294 printk(KERN_INFO
"%s Ethernet Driver, V%s\n", CARDNAME
, DRV_VERSION
);
1296 return platform_driver_register(&dm9000_driver
); /* search board and register */
1300 dm9000_cleanup(void)
1302 platform_driver_unregister(&dm9000_driver
);
1305 module_init(dm9000_init
);
1306 module_exit(dm9000_cleanup
);
1308 MODULE_AUTHOR("Sascha Hauer, Ben Dooks");
1309 MODULE_DESCRIPTION("Davicom DM9000 network driver");
1310 MODULE_LICENSE("GPL");