1 /* natsemi.c: A Linux PCI Ethernet driver for the NatSemi DP8381x series. */
3 Written/copyright 1999-2001 by Donald Becker.
4 Portions copyright (c) 2001,2002 Sun Microsystems (thockin@sun.com)
5 Portions copyright 2001,2002 Manfred Spraul (manfred@colorfullife.com)
7 This software may be used and distributed according to the terms of
8 the GNU General Public License (GPL), incorporated herein by reference.
9 Drivers based on or derived from this code fall under the GPL and must
10 retain the authorship, copyright and license notice. This file is not
11 a complete program and may only be used when the entire operating
12 system is licensed under the GPL. License for under other terms may be
13 available. Contact the original author for details.
15 The original author may be reached as becker@scyld.com, or at
16 Scyld Computing Corporation
17 410 Severn Ave., Suite 210
20 Support information and updates available at
21 http://www.scyld.com/network/netsemi.html
24 Linux kernel modifications:
28 - Bug fixes and better intr performance (Tjeerd)
30 - Now reads correct MAC address from eeprom
32 - Eliminate redundant priv->tx_full flag
33 - Call netif_start_queue from dev->tx_timeout
34 - wmb() in start_tx() to flush data
36 - Clean up PCI enable (davej)
38 - Merge Donald Becker's natsemi.c version 1.07
42 * ethtool support (jgarzik)
43 * Proper initialization of the card (which sometimes
44 fails to occur and leaves the card in a non-functional
47 * Some documented register settings to optimize some
48 of the 100Mbit autodetection circuitry in rev C cards. (uzi)
50 * Polling of the PHY intr for stuff like link state
51 change and auto- negotiation to finally work properly. (uzi)
53 * One-liner removal of a duplicate declaration of
56 Version 1.0.7: (Manfred Spraul)
59 * full reset added into tx_timeout
60 * correct multicast hash generation (both big and little endian)
61 [copied from a natsemi driver version
62 from Myrio Corporation, Greg Smith]
65 version 1.0.8 (Tim Hockin <thockin@sun.com>)
67 * Wake on lan support (Erik Gilling)
68 * MXDMA fixes for serverworks
71 version 1.0.9 (Manfred Spraul)
72 * Main change: fix lack of synchronize
73 netif_close/netif_suspend against a last interrupt
75 * do not enable superflous interrupts (e.g. the
76 drivers relies on TxDone - TxIntr not needed)
77 * wait that the hardware has really stopped in close
79 * workaround for the (at least) gcc-2.95.1 compiler
80 problem. Also simplifies the code a bit.
81 * disable_irq() in tx_timeout - needed to protect
82 against rx interrupts.
83 * stop the nic before switching into silent rx mode
84 for wol (required according to docu).
87 * use long for ee_addr (various)
88 * print pointers properly (DaveM)
89 * include asm/irq.h (?)
92 * check and reset if PHY errors appear (Adrian Sun)
93 * WoL cleanup (Tim Hockin)
94 * Magic number cleanup (Tim Hockin)
95 * Don't reload EEPROM on every reset (Tim Hockin)
96 * Save and restore EEPROM state across reset (Tim Hockin)
97 * MDIO Cleanup (Tim Hockin)
98 * Reformat register offsets/bits (jgarzik)
101 * ETHTOOL_* further support (Tim Hockin)
104 * ETHTOOL_[G]EEPROM support (Tim Hockin)
107 * crc cleanup (Matt Domsch <Matt_Domsch@dell.com>)
110 * Cleanup some messages and autoneg in ethtool (Tim Hockin)
113 * Get rid of cable_magic flag
114 * use new (National provided) solution for cable magic issue
117 * call netdev_rx() for RxErrors (Manfred Spraul)
118 * formatting and cleanups
119 * change options and full_duplex arrays to be zero
121 * enable only the WoL and PHY interrupts in wol mode
124 * only do cable_magic on 83815 and early 83816 (Tim Hockin)
125 * create a function for rx refill (Manfred Spraul)
126 * combine drain_ring and init_ring (Manfred Spraul)
127 * oom handling (Manfred Spraul)
128 * hands_off instead of playing with netif_device_{de,a}ttach
130 * be sure to write the MAC back to the chip (Manfred Spraul)
131 * lengthen EEPROM timeout, and always warn about timeouts
133 * comments update (Manfred)
134 * do the right thing on a phy-reset (Manfred and Tim)
137 * big endian support with CFG:BEM instead of cpu_to_le32
138 * support for an external PHY
142 #if !defined(__OPTIMIZE__)
143 #warning You must compile this file with the correct options!
144 #warning See the last lines of the source file.
145 #error You must compile this driver with "-O".
148 #include <linux/config.h>
149 #include <linux/module.h>
150 #include <linux/kernel.h>
151 #include <linux/string.h>
152 #include <linux/timer.h>
153 #include <linux/errno.h>
154 #include <linux/ioport.h>
155 #include <linux/slab.h>
156 #include <linux/interrupt.h>
157 #include <linux/pci.h>
158 #include <linux/netdevice.h>
159 #include <linux/etherdevice.h>
160 #include <linux/skbuff.h>
161 #include <linux/init.h>
162 #include <linux/spinlock.h>
163 #include <linux/ethtool.h>
164 #include <linux/delay.h>
165 #include <linux/rtnetlink.h>
166 #include <linux/mii.h>
167 #include <linux/crc32.h>
168 #include <asm/processor.h> /* Processor type for cache alignment. */
169 #include <asm/bitops.h>
172 #include <asm/uaccess.h>
174 #define DRV_NAME "natsemi"
175 #define DRV_VERSION "1.07+LK1.0.17"
176 #define DRV_RELDATE "Sep 27, 2002"
180 /* Updated to recommendations in pci-skeleton v2.03. */
182 /* The user-configurable values.
183 These may be modified when a driver module is loaded.*/
185 #define NATSEMI_DEF_MSG (NETIF_MSG_DRV | \
190 static int debug = -1;
192 /* Maximum events (Rx packets, etc.) to handle at each interrupt. */
193 static int max_interrupt_work = 20;
196 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
197 This chip uses a 512 element hash table based on the Ethernet CRC. */
198 static int multicast_filter_limit = 100;
200 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
201 Setting to > 1518 effectively disables this feature. */
202 static int rx_copybreak;
204 /* Used to pass the media type, etc.
205 Both 'options[]' and 'full_duplex[]' should exist for driver
207 The media type is usually passed in 'options[]'.
209 #define MAX_UNITS 8 /* More are supported, limit only on options */
210 static int options[MAX_UNITS];
211 static int full_duplex[MAX_UNITS];
213 /* Operational parameters that are set at compile time. */
215 /* Keep the ring sizes a power of two for compile efficiency.
216 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
217 Making the Tx ring too large decreases the effectiveness of channel
218 bonding and packet priority.
219 There are no ill effects from too-large receive rings. */
220 #define TX_RING_SIZE 16
221 #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */
222 #define RX_RING_SIZE 32
224 /* Operational parameters that usually are not changed. */
225 /* Time in jiffies before concluding the transmitter is hung. */
226 #define TX_TIMEOUT (2*HZ)
228 #define NATSEMI_HW_TIMEOUT 400
229 #define NATSEMI_TIMER_FREQ 3*HZ
230 #define NATSEMI_PG0_NREGS 64
231 #define NATSEMI_RFDR_NREGS 8
232 #define NATSEMI_PG1_NREGS 4
233 #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS + \
235 #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */
236 #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32))
237 #define NATSEMI_EEPROM_SIZE 24 /* 12 16-bit values */
239 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer. */
241 /* These identify the driver base version and may not be removed. */
242 static char version[] __devinitdata =
243 KERN_INFO DRV_NAME " dp8381x driver, version "
244 DRV_VERSION ", " DRV_RELDATE "\n"
245 KERN_INFO " originally by Donald Becker <becker@scyld.com>\n"
246 KERN_INFO " http://www.scyld.com/network/natsemi.html\n"
247 KERN_INFO " 2.4.x kernel port by Jeff Garzik, Tjeerd Mulder\n";
249 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
250 MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver");
251 MODULE_LICENSE("GPL");
253 MODULE_PARM(max_interrupt_work, "i");
254 MODULE_PARM(mtu, "i");
255 MODULE_PARM(debug, "i");
256 MODULE_PARM(rx_copybreak, "i");
257 MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
258 MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
259 MODULE_PARM_DESC(max_interrupt_work,
260 "DP8381x maximum events handled per interrupt");
261 MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)");
262 MODULE_PARM_DESC(debug, "DP8381x default debug level");
263 MODULE_PARM_DESC(rx_copybreak,
264 "DP8381x copy breakpoint for copy-only-tiny-frames");
265 MODULE_PARM_DESC(options,
266 "DP8381x: Bits 0-3: media type, bit 17: full duplex");
267 MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)");
272 I. Board Compatibility
274 This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC.
275 It also works with other chips in in the DP83810 series.
277 II. Board-specific settings
279 This driver requires the PCI interrupt line to be valid.
280 It honors the EEPROM-set values.
282 III. Driver operation
286 This driver uses two statically allocated fixed-size descriptor lists
287 formed into rings by a branch from the final descriptor to the beginning of
288 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
289 The NatSemi design uses a 'next descriptor' pointer that the driver forms
292 IIIb/c. Transmit/Receive Structure
294 This driver uses a zero-copy receive and transmit scheme.
295 The driver allocates full frame size skbuffs for the Rx ring buffers at
296 open() time and passes the skb->data field to the chip as receive data
297 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
298 a fresh skbuff is allocated and the frame is copied to the new skbuff.
299 When the incoming frame is larger, the skbuff is passed directly up the
300 protocol stack. Buffers consumed this way are replaced by newly allocated
301 skbuffs in a later phase of receives.
303 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
304 using a full-sized skbuff for small frames vs. the copying costs of larger
305 frames. New boards are typically used in generously configured machines
306 and the underfilled buffers have negligible impact compared to the benefit of
307 a single allocation size, so the default value of zero results in never
308 copying packets. When copying is done, the cost is usually mitigated by using
309 a combined copy/checksum routine. Copying also preloads the cache, which is
310 most useful with small frames.
312 A subtle aspect of the operation is that unaligned buffers are not permitted
313 by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't
314 longword aligned for further processing. On copies frames are put into the
315 skbuff at an offset of "+2", 16-byte aligning the IP header.
317 IIId. Synchronization
319 Most operations are synchronized on the np->lock irq spinlock, except the
320 performance critical codepaths:
322 The rx process only runs in the interrupt handler. Access from outside
323 the interrupt handler is only permitted after disable_irq().
325 The rx process usually runs under the dev->xmit_lock. If np->intr_tx_reap
326 is set, then access is permitted under spin_lock_irq(&np->lock).
328 Thus configuration functions that want to access everything must call
329 disable_irq(dev->irq);
330 spin_lock_bh(dev->xmit_lock);
331 spin_lock_irq(&np->lock);
335 NatSemi PCI network controllers are very uncommon.
339 http://www.scyld.com/expert/100mbps.html
340 http://www.scyld.com/expert/NWay.html
341 Datasheet is available from:
342 http://www.national.com/pf/DP/DP83815.html
354 PCI_USES_MASTER = 0x04,
359 /* MMIO operations required */
360 #define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1)
363 /* array of board data directly indexed by pci_tbl[x].driver_data */
367 } natsemi_pci_info[] __devinitdata = {
368 { "NatSemi DP8381[56]", PCI_IOTYPE },
371 static struct pci_device_id natsemi_pci_tbl[] = {
372 { PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_83815, PCI_ANY_ID, PCI_ANY_ID, },
375 MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl);
377 /* Offsets to the device registers.
378 Unlike software-only systems, device drivers interact with complex hardware.
379 It's not useful to define symbolic names for every register bit in the
382 enum register_offsets {
390 IntrHoldoff = 0x1C, /* DP83816 only */
417 /* These are from the spec, around page 78... on a separate table.
418 * The meaning of these registers depend on the value of PGSEL. */
425 /* the values for the 'magic' registers above (PGSEL=1) */
426 #define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */
427 #define TSTDAT_VAL 0x0
428 #define DSPCFG_VAL 0x5040
429 #define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */
430 #define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */
431 #define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */
433 /* misc PCI space registers */
434 enum pci_register_offsets {
448 enum ChipConfig_bits {
452 CfgAnegEnable = 0x2000,
454 CfgAnegFull = 0x8000,
455 CfgAnegDone = 0x8000000,
456 CfgFullDuplex = 0x20000000,
457 CfgSpeed100 = 0x40000000,
458 CfgLink = 0x80000000,
464 EE_ChipSelect = 0x08,
468 enum PCIBusCfg_bits {
472 /* Bits in the interrupt status/mask registers. */
473 enum IntrStatus_bits {
477 IntrRxEarly = 0x0008,
479 IntrRxOverrun = 0x0020,
484 IntrTxUnderrun = 0x0400,
489 IntrHighBits = 0x8000,
490 RxStatusFIFOOver = 0x10000,
491 IntrPCIErr = 0xf00000,
492 RxResetDone = 0x1000000,
493 TxResetDone = 0x2000000,
494 IntrAbnormalSummary = 0xCD20,
498 * Default Interrupts:
499 * Rx OK, Rx Packet Error, Rx Overrun,
500 * Tx OK, Tx Packet Error, Tx Underrun,
501 * MIB Service, Phy Interrupt, High Bits,
502 * Rx Status FIFO overrun,
503 * Received Target Abort, Received Master Abort,
504 * Signalled System Error, Received Parity Error
506 #define DEFAULT_INTR 0x00f1cd65
511 TxMxdmaMask = 0x700000,
513 TxMxdma_4 = 0x100000,
514 TxMxdma_8 = 0x200000,
515 TxMxdma_16 = 0x300000,
516 TxMxdma_32 = 0x400000,
517 TxMxdma_64 = 0x500000,
518 TxMxdma_128 = 0x600000,
519 TxMxdma_256 = 0x700000,
520 TxCollRetry = 0x800000,
521 TxAutoPad = 0x10000000,
522 TxMacLoop = 0x20000000,
523 TxHeartIgn = 0x40000000,
524 TxCarrierIgn = 0x80000000
529 RxMxdmaMask = 0x700000,
531 RxMxdma_4 = 0x100000,
532 RxMxdma_8 = 0x200000,
533 RxMxdma_16 = 0x300000,
534 RxMxdma_32 = 0x400000,
535 RxMxdma_64 = 0x500000,
536 RxMxdma_128 = 0x600000,
537 RxMxdma_256 = 0x700000,
538 RxAcceptLong = 0x8000000,
539 RxAcceptTx = 0x10000000,
540 RxAcceptRunt = 0x40000000,
541 RxAcceptErr = 0x80000000
560 WakeMagicSecure = 0x400,
561 SecureHack = 0x100000,
563 WokeUnicast = 0x800000,
564 WokeMulticast = 0x1000000,
565 WokeBroadcast = 0x2000000,
567 WokePMatch0 = 0x8000000,
568 WokePMatch1 = 0x10000000,
569 WokePMatch2 = 0x20000000,
570 WokePMatch3 = 0x40000000,
571 WokeMagic = 0x80000000,
572 WakeOptsSummary = 0x7ff
575 enum RxFilterAddr_bits {
576 RFCRAddressMask = 0x3ff,
577 AcceptMulticast = 0x00200000,
578 AcceptMyPhys = 0x08000000,
579 AcceptAllPhys = 0x10000000,
580 AcceptAllMulticast = 0x20000000,
581 AcceptBroadcast = 0x40000000,
582 RxFilterEnable = 0x80000000
585 enum StatsCtrl_bits {
592 enum MIntrCtrl_bits {
600 /* values we might find in the silicon revision register */
601 #define SRR_DP83815_C 0x0302
602 #define SRR_DP83815_D 0x0403
603 #define SRR_DP83816_A4 0x0504
604 #define SRR_DP83816_A5 0x0505
606 /* The Rx and Tx buffer descriptors. */
607 /* Note that using only 32 bit fields simplifies conversion to big-endian
616 /* Bits in network_desc.status */
617 enum desc_status_bits {
618 DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000,
619 DescNoCRC=0x10000000, DescPktOK=0x08000000,
622 DescTxAbort=0x04000000, DescTxFIFO=0x02000000,
623 DescTxCarrier=0x01000000, DescTxDefer=0x00800000,
624 DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000,
625 DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000,
627 DescRxAbort=0x04000000, DescRxOver=0x02000000,
628 DescRxDest=0x01800000, DescRxLong=0x00400000,
629 DescRxRunt=0x00200000, DescRxInvalid=0x00100000,
630 DescRxCRC=0x00080000, DescRxAlign=0x00040000,
631 DescRxLoop=0x00020000, DesRxColl=0x00010000,
634 struct netdev_private {
635 /* Descriptor rings first for alignment */
637 struct netdev_desc *rx_ring;
638 struct netdev_desc *tx_ring;
639 /* The addresses of receive-in-place skbuffs */
640 struct sk_buff *rx_skbuff[RX_RING_SIZE];
641 dma_addr_t rx_dma[RX_RING_SIZE];
642 /* address of a sent-in-place packet/buffer, for later free() */
643 struct sk_buff *tx_skbuff[TX_RING_SIZE];
644 dma_addr_t tx_dma[TX_RING_SIZE];
645 struct net_device_stats stats;
646 /* Media monitoring timer */
647 struct timer_list timer;
648 /* Frequently used values: keep some adjacent for cache effect */
649 struct pci_dev *pci_dev;
650 struct netdev_desc *rx_head_desc;
651 /* Producer/consumer ring indices */
652 unsigned int cur_rx, dirty_rx;
653 unsigned int cur_tx, dirty_tx;
654 /* Based on MTU+slack. */
655 unsigned int rx_buf_sz;
657 /* Do not touch the nic registers */
659 /* These values are keep track of the transceiver/media in use */
660 unsigned int full_duplex;
664 /* FIFO and PCI burst thresholds */
665 u32 tx_config, rx_config;
666 /* original contents of ClkRun register */
668 /* silicon revision */
670 /* expected DSPCFG value */
672 /* MII transceiver section */
679 static int eeprom_read(long ioaddr, int location);
680 static int mdio_read(struct net_device *dev, int phy_id, int reg);
681 static void mdio_write(struct net_device *dev, int phy_id, int reg, u16 data);
682 static void natsemi_reset(struct net_device *dev);
683 static void natsemi_reload_eeprom(struct net_device *dev);
684 static void natsemi_stop_rxtx(struct net_device *dev);
685 static int netdev_open(struct net_device *dev);
686 static void do_cable_magic(struct net_device *dev);
687 static void undo_cable_magic(struct net_device *dev);
688 static void check_link(struct net_device *dev);
689 static void netdev_timer(unsigned long data);
690 static void dump_ring(struct net_device *dev);
691 static void tx_timeout(struct net_device *dev);
692 static int alloc_ring(struct net_device *dev);
693 static void refill_rx(struct net_device *dev);
694 static void init_ring(struct net_device *dev);
695 static void drain_tx(struct net_device *dev);
696 static void drain_ring(struct net_device *dev);
697 static void free_ring(struct net_device *dev);
698 static void reinit_ring(struct net_device *dev);
699 static void init_registers(struct net_device *dev);
700 static int start_tx(struct sk_buff *skb, struct net_device *dev);
701 static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
702 static void netdev_error(struct net_device *dev, int intr_status);
703 static void netdev_rx(struct net_device *dev);
704 static void netdev_tx_done(struct net_device *dev);
705 static void __set_rx_mode(struct net_device *dev);
706 static void set_rx_mode(struct net_device *dev);
707 static void __get_stats(struct net_device *dev);
708 static struct net_device_stats *get_stats(struct net_device *dev);
709 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
710 static int netdev_set_wol(struct net_device *dev, u32 newval);
711 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur);
712 static int netdev_set_sopass(struct net_device *dev, u8 *newval);
713 static int netdev_get_sopass(struct net_device *dev, u8 *data);
714 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
715 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
716 static void enable_wol_mode(struct net_device *dev, int enable_intr);
717 static int netdev_close(struct net_device *dev);
718 static int netdev_get_regs(struct net_device *dev, u8 *buf);
719 static int netdev_get_eeprom(struct net_device *dev, u8 *buf);
722 static int __devinit natsemi_probe1 (struct pci_dev *pdev,
723 const struct pci_device_id *ent)
725 struct net_device *dev;
726 struct netdev_private *np;
727 int i, option, irq, chip_idx = ent->driver_data;
728 static int find_cnt = -1;
729 unsigned long ioaddr, iosize;
730 const int pcibar = 1; /* PCI base address register */
734 /* when built into the kernel, we only print version if device is found */
736 static int printed_version;
737 if (!printed_version++)
741 i = pci_enable_device(pdev);
744 /* natsemi has a non-standard PM control register
745 * in PCI config space. Some boards apparently need
746 * to be brought to D0 in this manner.
748 pci_read_config_dword(pdev, PCIPM, &tmp);
749 if (tmp & PCI_PM_CTRL_STATE_MASK) {
750 /* D0 state, disable PME assertion */
751 u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK;
752 pci_write_config_dword(pdev, PCIPM, newtmp);
756 ioaddr = pci_resource_start(pdev, pcibar);
757 iosize = pci_resource_len(pdev, pcibar);
760 if (natsemi_pci_info[chip_idx].flags & PCI_USES_MASTER)
761 pci_set_master(pdev);
763 dev = alloc_etherdev(sizeof (struct netdev_private));
766 SET_MODULE_OWNER(dev);
767 SET_NETDEV_DEV(dev, &pdev->dev);
769 i = pci_request_regions(pdev, DRV_NAME);
771 goto err_pci_request_regions;
773 ioaddr = (unsigned long) ioremap (ioaddr, iosize);
779 /* Work around the dropped serial bit. */
780 prev_eedata = eeprom_read(ioaddr, 6);
781 for (i = 0; i < 3; i++) {
782 int eedata = eeprom_read(ioaddr, i + 7);
783 dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15);
784 dev->dev_addr[i*2+1] = eedata >> 7;
785 prev_eedata = eedata;
788 dev->base_addr = ioaddr;
794 pci_set_drvdata(pdev, dev);
796 spin_lock_init(&np->lock);
797 np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
800 /* Reset the chip to erase previous misconfiguration. */
801 natsemi_reload_eeprom(dev);
804 option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
806 option = dev->mem_start;
808 /* The lower four bits are the media type. */
814 "%s: ignoring user supplied media type %d",
815 dev->name, option & 15);
817 if (find_cnt < MAX_UNITS && full_duplex[find_cnt])
820 /* The chip-specific entries in the device structure. */
821 dev->open = &netdev_open;
822 dev->hard_start_xmit = &start_tx;
823 dev->stop = &netdev_close;
824 dev->get_stats = &get_stats;
825 dev->set_multicast_list = &set_rx_mode;
826 dev->do_ioctl = &netdev_ioctl;
827 dev->tx_timeout = &tx_timeout;
828 dev->watchdog_timeo = TX_TIMEOUT;
833 i = register_netdev(dev);
835 goto err_register_netdev;
837 netif_carrier_off(dev);
839 if (netif_msg_drv(np)) {
840 printk(KERN_INFO "%s: %s at %#08lx, ",
841 dev->name, natsemi_pci_info[chip_idx].name, ioaddr);
842 for (i = 0; i < ETH_ALEN-1; i++)
843 printk("%02x:", dev->dev_addr[i]);
844 printk("%02x, IRQ %d.\n", dev->dev_addr[i], irq);
847 np->advertising = mdio_read(dev, 1, MII_ADVERTISE);
848 if ((readl(ioaddr + ChipConfig) & 0xe000) != 0xe000
849 && netif_msg_probe(np)) {
850 u32 chip_config = readl(ioaddr + ChipConfig);
851 printk(KERN_INFO "%s: Transceiver default autonegotiation %s "
854 chip_config & CfgAnegEnable ?
855 "enabled, advertise" : "disabled, force",
856 chip_config & CfgAneg100 ? "0" : "",
857 chip_config & CfgAnegFull ? "full" : "half");
859 if (netif_msg_probe(np))
861 "%s: Transceiver status %#04x advertising %#04x.\n",
862 dev->name, mdio_read(dev, 1, MII_BMSR),
865 /* save the silicon revision for later querying */
866 np->srr = readl(ioaddr + SiliconRev);
867 if (netif_msg_hw(np))
868 printk(KERN_INFO "%s: silicon revision %#04x.\n",
875 iounmap ((void *) dev->base_addr);
878 pci_release_regions(pdev);
879 pci_set_drvdata(pdev, NULL);
881 err_pci_request_regions:
887 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
888 The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */
890 /* Delay between EEPROM clock transitions.
891 No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
892 a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
893 made udelay() unreliable.
894 The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
897 #define eeprom_delay(ee_addr) readl(ee_addr)
899 #define EE_Write0 (EE_ChipSelect)
900 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
902 /* The EEPROM commands include the alway-set leading bit. */
904 EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
907 static int eeprom_read(long addr, int location)
911 long ee_addr = addr + EECtrl;
912 int read_cmd = location | EE_ReadCmd;
913 writel(EE_Write0, ee_addr);
915 /* Shift the read command bits out. */
916 for (i = 10; i >= 0; i--) {
917 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
918 writel(dataval, ee_addr);
919 eeprom_delay(ee_addr);
920 writel(dataval | EE_ShiftClk, ee_addr);
921 eeprom_delay(ee_addr);
923 writel(EE_ChipSelect, ee_addr);
924 eeprom_delay(ee_addr);
926 for (i = 0; i < 16; i++) {
927 writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
928 eeprom_delay(ee_addr);
929 retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0;
930 writel(EE_ChipSelect, ee_addr);
931 eeprom_delay(ee_addr);
934 /* Terminate the EEPROM access. */
935 writel(EE_Write0, ee_addr);
940 /* MII transceiver control section.
941 * The 83815 series has an internal transceiver, and we present the
942 * management registers as if they were MII connected. */
944 static int mdio_read(struct net_device *dev, int phy_id, int reg)
946 if (phy_id == 1 && reg < 32)
947 return readl(dev->base_addr+BasicControl+(reg<<2))&0xffff;
952 static void mdio_write(struct net_device *dev, int phy_id, int reg, u16 data)
954 struct netdev_private *np = dev->priv;
955 if (phy_id == 1 && reg < 32) {
956 writew(data, dev->base_addr+BasicControl+(reg<<2));
958 case MII_ADVERTISE: np->advertising = data; break;
963 /* CFG bits [13:16] [18:23] */
964 #define CFG_RESET_SAVE 0xfde000
965 /* WCSR bits [0:4] [9:10] */
966 #define WCSR_RESET_SAVE 0x61f
967 /* RFCR bits [20] [22] [27:31] */
968 #define RFCR_RESET_SAVE 0xf8500000;
970 static void natsemi_reset(struct net_device *dev)
978 struct netdev_private *np = dev->priv;
981 * Resetting the chip causes some registers to be lost.
982 * Natsemi suggests NOT reloading the EEPROM while live, so instead
983 * we save the state that would have been loaded from EEPROM
984 * on a normal power-up (see the spec EEPROM map). This assumes
985 * whoever calls this will follow up with init_registers() eventually.
989 cfg = readl(dev->base_addr + ChipConfig) & CFG_RESET_SAVE;
991 wcsr = readl(dev->base_addr + WOLCmd) & WCSR_RESET_SAVE;
993 rfcr = readl(dev->base_addr + RxFilterAddr) & RFCR_RESET_SAVE;
995 for (i = 0; i < 3; i++) {
996 writel(i*2, dev->base_addr + RxFilterAddr);
997 pmatch[i] = readw(dev->base_addr + RxFilterData);
1000 for (i = 0; i < 3; i++) {
1001 writel(0xa+(i*2), dev->base_addr + RxFilterAddr);
1002 sopass[i] = readw(dev->base_addr + RxFilterData);
1005 /* now whack the chip */
1006 writel(ChipReset, dev->base_addr + ChipCmd);
1007 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1008 if (!(readl(dev->base_addr + ChipCmd) & ChipReset))
1012 if (i==NATSEMI_HW_TIMEOUT) {
1013 printk(KERN_WARNING "%s: reset did not complete in %d usec.\n",
1015 } else if (netif_msg_hw(np)) {
1016 printk(KERN_DEBUG "%s: reset completed in %d usec.\n",
1021 cfg |= readl(dev->base_addr + ChipConfig) & ~CFG_RESET_SAVE;
1022 writel(cfg, dev->base_addr + ChipConfig);
1024 wcsr |= readl(dev->base_addr + WOLCmd) & ~WCSR_RESET_SAVE;
1025 writel(wcsr, dev->base_addr + WOLCmd);
1027 rfcr |= readl(dev->base_addr + RxFilterAddr) & ~RFCR_RESET_SAVE;
1028 /* restore PMATCH */
1029 for (i = 0; i < 3; i++) {
1030 writel(i*2, dev->base_addr + RxFilterAddr);
1031 writew(pmatch[i], dev->base_addr + RxFilterData);
1033 for (i = 0; i < 3; i++) {
1034 writel(0xa+(i*2), dev->base_addr + RxFilterAddr);
1035 writew(sopass[i], dev->base_addr + RxFilterData);
1038 writel(rfcr, dev->base_addr + RxFilterAddr);
1041 static void natsemi_reload_eeprom(struct net_device *dev)
1043 struct netdev_private *np = dev->priv;
1046 writel(EepromReload, dev->base_addr + PCIBusCfg);
1047 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1049 if (!(readl(dev->base_addr + PCIBusCfg) & EepromReload))
1052 if (i==NATSEMI_HW_TIMEOUT) {
1053 printk(KERN_WARNING "%s: EEPROM did not reload in %d usec.\n",
1055 } else if (netif_msg_hw(np)) {
1056 printk(KERN_DEBUG "%s: EEPROM reloaded in %d usec.\n",
1061 static void natsemi_stop_rxtx(struct net_device *dev)
1063 long ioaddr = dev->base_addr;
1064 struct netdev_private *np = dev->priv;
1067 writel(RxOff | TxOff, ioaddr + ChipCmd);
1068 for(i=0;i< NATSEMI_HW_TIMEOUT;i++) {
1069 if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0)
1073 if (i==NATSEMI_HW_TIMEOUT) {
1074 printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n",
1076 } else if (netif_msg_hw(np)) {
1077 printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n",
1082 static int netdev_open(struct net_device *dev)
1084 struct netdev_private *np = dev->priv;
1085 long ioaddr = dev->base_addr;
1088 /* Reset the chip, just in case. */
1091 i = request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev);
1094 if (netif_msg_ifup(np))
1095 printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
1096 dev->name, dev->irq);
1097 i = alloc_ring(dev);
1099 free_irq(dev->irq, dev);
1103 spin_lock_irq(&np->lock);
1104 init_registers(dev);
1105 /* now set the MAC address according to dev->dev_addr */
1106 for (i = 0; i < 3; i++) {
1107 u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i];
1109 writel(i*2, ioaddr + RxFilterAddr);
1110 writew(mac, ioaddr + RxFilterData);
1112 writel(np->cur_rx_mode, ioaddr + RxFilterAddr);
1113 spin_unlock_irq(&np->lock);
1115 netif_start_queue(dev);
1117 if (netif_msg_ifup(np))
1118 printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n",
1119 dev->name, (int)readl(ioaddr + ChipCmd));
1121 /* Set the timer to check for link beat. */
1122 init_timer(&np->timer);
1123 np->timer.expires = jiffies + NATSEMI_TIMER_FREQ;
1124 np->timer.data = (unsigned long)dev;
1125 np->timer.function = &netdev_timer; /* timer handler */
1126 add_timer(&np->timer);
1131 static void do_cable_magic(struct net_device *dev)
1133 struct netdev_private *np = dev->priv;
1135 if (np->srr >= SRR_DP83816_A5)
1139 * 100 MBit links with short cables can trip an issue with the chip.
1140 * The problem manifests as lots of CRC errors and/or flickering
1141 * activity LED while idle. This process is based on instructions
1142 * from engineers at National.
1144 if (readl(dev->base_addr + ChipConfig) & CfgSpeed100) {
1147 writew(1, dev->base_addr + PGSEL);
1149 * coefficient visibility should already be enabled via
1152 data = readw(dev->base_addr + TSTDAT) & 0xff;
1154 * the value must be negative, and within certain values
1155 * (these values all come from National)
1157 if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) {
1158 struct netdev_private *np = dev->priv;
1160 /* the bug has been triggered - fix the coefficient */
1161 writew(TSTDAT_FIXED, dev->base_addr + TSTDAT);
1162 /* lock the value */
1163 data = readw(dev->base_addr + DSPCFG);
1164 np->dspcfg = data | DSPCFG_LOCK;
1165 writew(np->dspcfg, dev->base_addr + DSPCFG);
1167 writew(0, dev->base_addr + PGSEL);
1171 static void undo_cable_magic(struct net_device *dev)
1174 struct netdev_private *np = dev->priv;
1176 if (np->srr >= SRR_DP83816_A5)
1179 writew(1, dev->base_addr + PGSEL);
1180 /* make sure the lock bit is clear */
1181 data = readw(dev->base_addr + DSPCFG);
1182 np->dspcfg = data & ~DSPCFG_LOCK;
1183 writew(np->dspcfg, dev->base_addr + DSPCFG);
1184 writew(0, dev->base_addr + PGSEL);
1187 static void check_link(struct net_device *dev)
1189 struct netdev_private *np = dev->priv;
1190 long ioaddr = dev->base_addr;
1192 int chipcfg = readl(ioaddr + ChipConfig);
1194 if (!(chipcfg & CfgLink)) {
1195 if (netif_carrier_ok(dev)) {
1196 if (netif_msg_link(np))
1197 printk(KERN_NOTICE "%s: link down.\n",
1199 netif_carrier_off(dev);
1200 undo_cable_magic(dev);
1204 if (!netif_carrier_ok(dev)) {
1205 if (netif_msg_link(np))
1206 printk(KERN_NOTICE "%s: link up.\n", dev->name);
1207 netif_carrier_on(dev);
1208 do_cable_magic(dev);
1211 duplex = np->full_duplex || (chipcfg & CfgFullDuplex ? 1 : 0);
1213 /* if duplex is set then bit 28 must be set, too */
1214 if (duplex ^ !!(np->rx_config & RxAcceptTx)) {
1215 if (netif_msg_link(np))
1217 "%s: Setting %s-duplex based on negotiated "
1218 "link capability.\n", dev->name,
1219 duplex ? "full" : "half");
1221 np->rx_config |= RxAcceptTx;
1222 np->tx_config |= TxCarrierIgn | TxHeartIgn;
1224 np->rx_config &= ~RxAcceptTx;
1225 np->tx_config &= ~(TxCarrierIgn | TxHeartIgn);
1227 writel(np->tx_config, ioaddr + TxConfig);
1228 writel(np->rx_config, ioaddr + RxConfig);
1232 static void init_registers(struct net_device *dev)
1234 struct netdev_private *np = dev->priv;
1235 long ioaddr = dev->base_addr;
1238 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1239 if (readl(dev->base_addr + ChipConfig) & CfgAnegDone)
1243 if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
1245 "%s: autonegotiation did not complete in %d usec.\n",
1249 /* On page 78 of the spec, they recommend some settings for "optimum
1250 performance" to be done in sequence. These settings optimize some
1251 of the 100Mbit autodetection circuitry. They say we only want to
1252 do this for rev C of the chip, but engineers at NSC (Bradley
1253 Kennedy) recommends always setting them. If you don't, you get
1254 errors on some autonegotiations that make the device unusable.
1256 writew(1, ioaddr + PGSEL);
1257 writew(PMDCSR_VAL, ioaddr + PMDCSR);
1258 writew(TSTDAT_VAL, ioaddr + TSTDAT);
1259 writew(DSPCFG_VAL, ioaddr + DSPCFG);
1260 writew(SDCFG_VAL, ioaddr + SDCFG);
1261 writew(0, ioaddr + PGSEL);
1262 np->dspcfg = DSPCFG_VAL;
1264 /* Enable PHY Specific event based interrupts. Link state change
1265 and Auto-Negotiation Completion are among the affected.
1266 Read the intr status to clear it (needed for wake events).
1268 readw(ioaddr + MIntrStatus);
1269 writew(MICRIntEn, ioaddr + MIntrCtrl);
1271 /* clear any interrupts that are pending, such as wake events */
1272 readl(ioaddr + IntrStatus);
1274 writel(np->ring_dma, ioaddr + RxRingPtr);
1275 writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc),
1276 ioaddr + TxRingPtr);
1278 /* Initialize other registers.
1279 * Configure the PCI bus bursts and FIFO thresholds.
1280 * Configure for standard, in-spec Ethernet.
1281 * Start with half-duplex. check_link will update
1282 * to the correct settings.
1285 /* DRTH: 2: start tx if 64 bytes are in the fifo
1286 * FLTH: 0x10: refill with next packet if 512 bytes are free
1287 * MXDMA: 0: up to 256 byte bursts.
1288 * MXDMA must be <= FLTH
1292 np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 | (0x1002);
1293 writel(np->tx_config, ioaddr + TxConfig);
1295 /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo
1296 * MXDMA 0: up to 256 byte bursts
1298 np->rx_config = RxMxdma_256 | 0x20;
1299 writel(np->rx_config, ioaddr + RxConfig);
1302 * The PME bit is initialized from the EEPROM contents.
1303 * PCI cards probably have PME disabled, but motherboard
1304 * implementations may have PME set to enable WakeOnLan.
1305 * With PME set the chip will scan incoming packets but
1306 * nothing will be written to memory. */
1307 np->SavedClkRun = readl(ioaddr + ClkRun);
1308 writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun);
1309 if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) {
1310 printk(KERN_NOTICE "%s: Wake-up event %#08x\n",
1311 dev->name, readl(ioaddr + WOLCmd));
1317 /* Enable interrupts by setting the interrupt mask. */
1318 writel(DEFAULT_INTR, ioaddr + IntrMask);
1319 writel(1, ioaddr + IntrEnable);
1321 writel(RxOn | TxOn, ioaddr + ChipCmd);
1322 writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
1328 * 1) check for link changes. Usually they are handled by the MII interrupt
1329 * but it doesn't hurt to check twice.
1330 * 2) check for sudden death of the NIC:
1331 * It seems that a reference set for this chip went out with incorrect info,
1332 * and there exist boards that aren't quite right. An unexpected voltage
1333 * drop can cause the PHY to get itself in a weird state (basically reset).
1334 * NOTE: this only seems to affect revC chips.
1335 * 3) check of death of the RX path due to OOM
1337 static void netdev_timer(unsigned long data)
1339 struct net_device *dev = (struct net_device *)data;
1340 struct netdev_private *np = dev->priv;
1341 int next_tick = 5*HZ;
1342 long ioaddr = dev->base_addr;
1345 if (netif_msg_timer(np)) {
1346 /* DO NOT read the IntrStatus register,
1347 * a read clears any pending interrupts.
1349 printk(KERN_DEBUG "%s: Media selection timer tick.\n",
1353 spin_lock_irq(&np->lock);
1355 /* check for a nasty random phy-reset - use dspcfg as a flag */
1356 writew(1, ioaddr+PGSEL);
1357 dspcfg = readw(ioaddr+DSPCFG);
1358 writew(0, ioaddr+PGSEL);
1359 if (dspcfg != np->dspcfg) {
1360 if (!netif_queue_stopped(dev)) {
1361 spin_unlock_irq(&np->lock);
1362 if (netif_msg_hw(np))
1363 printk(KERN_NOTICE "%s: possible phy reset: "
1364 "re-initializing\n", dev->name);
1365 disable_irq(dev->irq);
1366 spin_lock_irq(&np->lock);
1367 natsemi_stop_rxtx(dev);
1370 init_registers(dev);
1371 spin_unlock_irq(&np->lock);
1372 enable_irq(dev->irq);
1376 spin_unlock_irq(&np->lock);
1379 /* init_registers() calls check_link() for the above case */
1381 spin_unlock_irq(&np->lock);
1384 disable_irq(dev->irq);
1387 enable_irq(dev->irq);
1389 writel(RxOn, dev->base_addr + ChipCmd);
1394 mod_timer(&np->timer, jiffies + next_tick);
1397 static void dump_ring(struct net_device *dev)
1399 struct netdev_private *np = dev->priv;
1401 if (netif_msg_pktdata(np)) {
1403 printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring);
1404 for (i = 0; i < TX_RING_SIZE; i++) {
1405 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1406 i, np->tx_ring[i].next_desc,
1407 np->tx_ring[i].cmd_status,
1408 np->tx_ring[i].addr);
1410 printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring);
1411 for (i = 0; i < RX_RING_SIZE; i++) {
1412 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1413 i, np->rx_ring[i].next_desc,
1414 np->rx_ring[i].cmd_status,
1415 np->rx_ring[i].addr);
1420 static void tx_timeout(struct net_device *dev)
1422 struct netdev_private *np = dev->priv;
1423 long ioaddr = dev->base_addr;
1425 disable_irq(dev->irq);
1426 spin_lock_irq(&np->lock);
1427 if (!np->hands_off) {
1428 if (netif_msg_tx_err(np))
1430 "%s: Transmit timed out, status %#08x,"
1432 dev->name, readl(ioaddr + IntrStatus));
1437 init_registers(dev);
1440 "%s: tx_timeout while in hands_off state?\n",
1443 spin_unlock_irq(&np->lock);
1444 enable_irq(dev->irq);
1446 dev->trans_start = jiffies;
1447 np->stats.tx_errors++;
1448 netif_wake_queue(dev);
1451 static int alloc_ring(struct net_device *dev)
1453 struct netdev_private *np = dev->priv;
1454 np->rx_ring = pci_alloc_consistent(np->pci_dev,
1455 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
1459 np->tx_ring = &np->rx_ring[RX_RING_SIZE];
1463 static void refill_rx(struct net_device *dev)
1465 struct netdev_private *np = dev->priv;
1467 /* Refill the Rx ring buffers. */
1468 for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1469 struct sk_buff *skb;
1470 int entry = np->dirty_rx % RX_RING_SIZE;
1471 if (np->rx_skbuff[entry] == NULL) {
1472 unsigned int buflen = np->rx_buf_sz + RX_OFFSET;
1473 skb = dev_alloc_skb(buflen);
1474 np->rx_skbuff[entry] = skb;
1476 break; /* Better luck next round. */
1477 skb->dev = dev; /* Mark as being used by this device. */
1478 np->rx_dma[entry] = pci_map_single(np->pci_dev,
1479 skb->tail, buflen, PCI_DMA_FROMDEVICE);
1480 np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
1482 np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz);
1484 if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) {
1485 if (netif_msg_rx_err(np))
1486 printk(KERN_WARNING "%s: going OOM.\n", dev->name);
1491 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1492 static void init_ring(struct net_device *dev)
1494 struct netdev_private *np = dev->priv;
1498 np->dirty_tx = np->cur_tx = 0;
1499 for (i = 0; i < TX_RING_SIZE; i++) {
1500 np->tx_skbuff[i] = NULL;
1501 np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1502 +sizeof(struct netdev_desc)
1503 *((i+1)%TX_RING_SIZE+RX_RING_SIZE));
1504 np->tx_ring[i].cmd_status = 0;
1509 np->cur_rx = RX_RING_SIZE;
1510 np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
1512 np->rx_head_desc = &np->rx_ring[0];
1514 /* Please be carefull before changing this loop - at least gcc-2.95.1
1515 * miscompiles it otherwise.
1517 /* Initialize all Rx descriptors. */
1518 for (i = 0; i < RX_RING_SIZE; i++) {
1519 np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1520 +sizeof(struct netdev_desc)
1521 *((i+1)%RX_RING_SIZE));
1522 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
1523 np->rx_skbuff[i] = NULL;
1529 static void drain_tx(struct net_device *dev)
1531 struct netdev_private *np = dev->priv;
1534 for (i = 0; i < TX_RING_SIZE; i++) {
1535 if (np->tx_skbuff[i]) {
1536 pci_unmap_single(np->pci_dev,
1537 np->tx_dma[i], np->tx_skbuff[i]->len,
1539 dev_kfree_skb(np->tx_skbuff[i]);
1540 np->stats.tx_dropped++;
1542 np->tx_skbuff[i] = NULL;
1546 static void drain_ring(struct net_device *dev)
1548 struct netdev_private *np = dev->priv;
1549 unsigned int buflen = np->rx_buf_sz + RX_OFFSET;
1552 /* Free all the skbuffs in the Rx queue. */
1553 for (i = 0; i < RX_RING_SIZE; i++) {
1554 np->rx_ring[i].cmd_status = 0;
1555 np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
1556 if (np->rx_skbuff[i]) {
1557 pci_unmap_single(np->pci_dev,
1558 np->rx_dma[i], buflen,
1559 PCI_DMA_FROMDEVICE);
1560 dev_kfree_skb(np->rx_skbuff[i]);
1562 np->rx_skbuff[i] = NULL;
1567 static void free_ring(struct net_device *dev)
1569 struct netdev_private *np = dev->priv;
1570 pci_free_consistent(np->pci_dev,
1571 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
1572 np->rx_ring, np->ring_dma);
1575 static void reinit_ring(struct net_device *dev)
1577 struct netdev_private *np = dev->priv;
1582 np->dirty_tx = np->cur_tx = 0;
1583 for (i=0;i<TX_RING_SIZE;i++)
1584 np->tx_ring[i].cmd_status = 0;
1588 np->cur_rx = RX_RING_SIZE;
1589 np->rx_head_desc = &np->rx_ring[0];
1590 /* Initialize all Rx descriptors. */
1591 for (i = 0; i < RX_RING_SIZE; i++)
1592 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
1597 static int start_tx(struct sk_buff *skb, struct net_device *dev)
1599 struct netdev_private *np = dev->priv;
1602 /* Note: Ordering is important here, set the field with the
1603 "ownership" bit last, and only then increment cur_tx. */
1605 /* Calculate the next Tx descriptor entry. */
1606 entry = np->cur_tx % TX_RING_SIZE;
1608 np->tx_skbuff[entry] = skb;
1609 np->tx_dma[entry] = pci_map_single(np->pci_dev,
1610 skb->data,skb->len, PCI_DMA_TODEVICE);
1612 np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]);
1614 spin_lock_irq(&np->lock);
1616 if (!np->hands_off) {
1617 np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len);
1618 /* StrongARM: Explicitly cache flush np->tx_ring and
1619 * skb->data,skb->len. */
1622 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
1623 netdev_tx_done(dev);
1624 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1)
1625 netif_stop_queue(dev);
1627 /* Wake the potentially-idle transmit channel. */
1628 writel(TxOn, dev->base_addr + ChipCmd);
1630 dev_kfree_skb_irq(skb);
1631 np->stats.tx_dropped++;
1633 spin_unlock_irq(&np->lock);
1635 dev->trans_start = jiffies;
1637 if (netif_msg_tx_queued(np)) {
1638 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
1639 dev->name, np->cur_tx, entry);
1644 static void netdev_tx_done(struct net_device *dev)
1646 struct netdev_private *np = dev->priv;
1648 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1649 int entry = np->dirty_tx % TX_RING_SIZE;
1650 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn))
1652 if (netif_msg_tx_done(np))
1654 "%s: tx frame #%d finished, status %#08x.\n",
1655 dev->name, np->dirty_tx,
1656 le32_to_cpu(np->tx_ring[entry].cmd_status));
1657 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) {
1658 np->stats.tx_packets++;
1659 np->stats.tx_bytes += np->tx_skbuff[entry]->len;
1660 } else { /* Various Tx errors */
1662 le32_to_cpu(np->tx_ring[entry].cmd_status);
1663 if (tx_status & (DescTxAbort|DescTxExcColl))
1664 np->stats.tx_aborted_errors++;
1665 if (tx_status & DescTxFIFO)
1666 np->stats.tx_fifo_errors++;
1667 if (tx_status & DescTxCarrier)
1668 np->stats.tx_carrier_errors++;
1669 if (tx_status & DescTxOOWCol)
1670 np->stats.tx_window_errors++;
1671 np->stats.tx_errors++;
1673 pci_unmap_single(np->pci_dev,np->tx_dma[entry],
1674 np->tx_skbuff[entry]->len,
1676 /* Free the original skb. */
1677 dev_kfree_skb_irq(np->tx_skbuff[entry]);
1678 np->tx_skbuff[entry] = NULL;
1680 if (netif_queue_stopped(dev)
1681 && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
1682 /* The ring is no longer full, wake queue. */
1683 netif_wake_queue(dev);
1687 /* The interrupt handler does all of the Rx thread work and cleans up
1688 after the Tx thread. */
1689 static irqreturn_t intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
1691 struct net_device *dev = dev_instance;
1692 struct netdev_private *np = dev->priv;
1693 long ioaddr = dev->base_addr;
1694 int boguscnt = max_interrupt_work;
1695 unsigned int handled = 0;
1700 /* Reading automatically acknowledges all int sources. */
1701 u32 intr_status = readl(ioaddr + IntrStatus);
1703 if (netif_msg_intr(np))
1705 "%s: Interrupt, status %#08x, mask %#08x.\n",
1706 dev->name, intr_status,
1707 readl(ioaddr + IntrMask));
1709 if (intr_status == 0)
1714 (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
1715 IntrRxErr | IntrRxOverrun)) {
1720 (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) {
1721 spin_lock(&np->lock);
1722 netdev_tx_done(dev);
1723 spin_unlock(&np->lock);
1726 /* Abnormal error summary/uncommon events handlers. */
1727 if (intr_status & IntrAbnormalSummary)
1728 netdev_error(dev, intr_status);
1730 if (--boguscnt < 0) {
1731 if (netif_msg_intr(np))
1733 "%s: Too much work at interrupt, "
1735 dev->name, intr_status);
1740 if (netif_msg_intr(np))
1741 printk(KERN_DEBUG "%s: exiting interrupt.\n", dev->name);
1743 return IRQ_RETVAL(handled);
1746 /* This routine is logically part of the interrupt handler, but separated
1747 for clarity and better register allocation. */
1748 static void netdev_rx(struct net_device *dev)
1750 struct netdev_private *np = dev->priv;
1751 int entry = np->cur_rx % RX_RING_SIZE;
1752 int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
1753 s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
1754 unsigned int buflen = np->rx_buf_sz + RX_OFFSET;
1756 /* If the driver owns the next entry it's a new packet. Send it up. */
1757 while (desc_status < 0) { /* e.g. & DescOwn */
1758 if (netif_msg_rx_status(np))
1760 " netdev_rx() entry %d status was %#08x.\n",
1761 entry, desc_status);
1764 if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){
1765 if (desc_status & DescMore) {
1766 if (netif_msg_rx_err(np))
1768 "%s: Oversized(?) Ethernet "
1769 "frame spanned multiple "
1770 "buffers, entry %#08x "
1771 "status %#08x.\n", dev->name,
1772 np->cur_rx, desc_status);
1773 np->stats.rx_length_errors++;
1775 /* There was an error. */
1776 np->stats.rx_errors++;
1777 if (desc_status & (DescRxAbort|DescRxOver))
1778 np->stats.rx_over_errors++;
1779 if (desc_status & (DescRxLong|DescRxRunt))
1780 np->stats.rx_length_errors++;
1781 if (desc_status & (DescRxInvalid|DescRxAlign))
1782 np->stats.rx_frame_errors++;
1783 if (desc_status & DescRxCRC)
1784 np->stats.rx_crc_errors++;
1787 struct sk_buff *skb;
1788 /* Omit CRC size. */
1789 int pkt_len = (desc_status & DescSizeMask) - 4;
1790 /* Check if the packet is long enough to accept
1791 * without copying to a minimally-sized skbuff. */
1792 if (pkt_len < rx_copybreak
1793 && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) {
1795 /* 16 byte align the IP header */
1796 skb_reserve(skb, RX_OFFSET);
1797 pci_dma_sync_single_for_cpu(np->pci_dev,
1800 PCI_DMA_FROMDEVICE);
1801 eth_copy_and_sum(skb,
1802 np->rx_skbuff[entry]->tail, pkt_len, 0);
1803 skb_put(skb, pkt_len);
1804 pci_dma_sync_single_for_device(np->pci_dev,
1807 PCI_DMA_FROMDEVICE);
1809 pci_unmap_single(np->pci_dev, np->rx_dma[entry],
1810 buflen, PCI_DMA_FROMDEVICE);
1811 skb_put(skb = np->rx_skbuff[entry], pkt_len);
1812 np->rx_skbuff[entry] = NULL;
1814 skb->protocol = eth_type_trans(skb, dev);
1816 dev->last_rx = jiffies;
1817 np->stats.rx_packets++;
1818 np->stats.rx_bytes += pkt_len;
1820 entry = (++np->cur_rx) % RX_RING_SIZE;
1821 np->rx_head_desc = &np->rx_ring[entry];
1822 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
1826 /* Restart Rx engine if stopped. */
1828 mod_timer(&np->timer, jiffies + 1);
1830 writel(RxOn, dev->base_addr + ChipCmd);
1833 static void netdev_error(struct net_device *dev, int intr_status)
1835 struct netdev_private *np = dev->priv;
1836 long ioaddr = dev->base_addr;
1838 spin_lock(&np->lock);
1839 if (intr_status & LinkChange) {
1840 u16 adv = mdio_read(dev, 1, MII_ADVERTISE);
1841 u16 lpa = mdio_read(dev, 1, MII_LPA);
1842 if (mdio_read(dev, 1, MII_BMCR) & BMCR_ANENABLE
1843 && netif_msg_link(np)) {
1845 "%s: Autonegotiation advertising"
1846 " %#04x partner %#04x.\n", dev->name,
1850 /* read MII int status to clear the flag */
1851 readw(ioaddr + MIntrStatus);
1854 if (intr_status & StatsMax) {
1857 if (intr_status & IntrTxUnderrun) {
1858 if ((np->tx_config & TxDrthMask) < 62)
1860 if (netif_msg_tx_err(np))
1862 "%s: increased Tx threshold, txcfg %#08x.\n",
1863 dev->name, np->tx_config);
1864 writel(np->tx_config, ioaddr + TxConfig);
1866 if (intr_status & WOLPkt && netif_msg_wol(np)) {
1867 int wol_status = readl(ioaddr + WOLCmd);
1868 printk(KERN_NOTICE "%s: Link wake-up event %#08x\n",
1869 dev->name, wol_status);
1871 if (intr_status & RxStatusFIFOOver) {
1872 if (netif_msg_rx_err(np) && netif_msg_intr(np)) {
1873 printk(KERN_NOTICE "%s: Rx status FIFO overrun\n",
1876 np->stats.rx_fifo_errors++;
1878 /* Hmmmmm, it's not clear how to recover from PCI faults. */
1879 if (intr_status & IntrPCIErr) {
1880 printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name,
1881 intr_status & IntrPCIErr);
1882 np->stats.tx_fifo_errors++;
1883 np->stats.rx_fifo_errors++;
1885 spin_unlock(&np->lock);
1888 static void __get_stats(struct net_device *dev)
1890 long ioaddr = dev->base_addr;
1891 struct netdev_private *np = dev->priv;
1893 /* The chip only need report frame silently dropped. */
1894 np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
1895 np->stats.rx_missed_errors += readl(ioaddr + RxMissed);
1898 static struct net_device_stats *get_stats(struct net_device *dev)
1900 struct netdev_private *np = dev->priv;
1902 /* The chip only need report frame silently dropped. */
1903 spin_lock_irq(&np->lock);
1904 if (netif_running(dev) && !np->hands_off)
1906 spin_unlock_irq(&np->lock);
1911 #define HASH_TABLE 0x200
1912 static void __set_rx_mode(struct net_device *dev)
1914 long ioaddr = dev->base_addr;
1915 struct netdev_private *np = dev->priv;
1916 u8 mc_filter[64]; /* Multicast hash filter */
1919 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1920 /* Unconditionally log net taps. */
1921 printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n",
1923 rx_mode = RxFilterEnable | AcceptBroadcast
1924 | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys;
1925 } else if ((dev->mc_count > multicast_filter_limit)
1926 || (dev->flags & IFF_ALLMULTI)) {
1927 rx_mode = RxFilterEnable | AcceptBroadcast
1928 | AcceptAllMulticast | AcceptMyPhys;
1930 struct dev_mc_list *mclist;
1932 memset(mc_filter, 0, sizeof(mc_filter));
1933 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1934 i++, mclist = mclist->next) {
1935 int i = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff;
1936 mc_filter[i/8] |= (1 << (i & 0x07));
1938 rx_mode = RxFilterEnable | AcceptBroadcast
1939 | AcceptMulticast | AcceptMyPhys;
1940 for (i = 0; i < 64; i += 2) {
1941 writew(HASH_TABLE + i, ioaddr + RxFilterAddr);
1942 writew((mc_filter[i+1]<<8) + mc_filter[i],
1943 ioaddr + RxFilterData);
1946 writel(rx_mode, ioaddr + RxFilterAddr);
1947 np->cur_rx_mode = rx_mode;
1950 static void set_rx_mode(struct net_device *dev)
1952 struct netdev_private *np = dev->priv;
1953 spin_lock_irq(&np->lock);
1956 spin_unlock_irq(&np->lock);
1959 static int netdev_ethtool_ioctl(struct net_device *dev, void __user *useraddr)
1961 struct netdev_private *np = dev->priv;
1964 if (get_user(cmd, (u32 __user *)useraddr))
1968 /* get driver info */
1969 case ETHTOOL_GDRVINFO: {
1970 struct ethtool_drvinfo info = {ETHTOOL_GDRVINFO};
1971 strncpy(info.driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
1972 strncpy(info.version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
1973 info.fw_version[0] = '\0';
1974 strncpy(info.bus_info, pci_name(np->pci_dev),
1975 ETHTOOL_BUSINFO_LEN);
1976 info.eedump_len = NATSEMI_EEPROM_SIZE;
1977 info.regdump_len = NATSEMI_REGS_SIZE;
1978 if (copy_to_user(useraddr, &info, sizeof(info)))
1983 case ETHTOOL_GSET: {
1984 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
1985 spin_lock_irq(&np->lock);
1986 netdev_get_ecmd(dev, &ecmd);
1987 spin_unlock_irq(&np->lock);
1988 if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
1993 case ETHTOOL_SSET: {
1994 struct ethtool_cmd ecmd;
1996 if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
1998 spin_lock_irq(&np->lock);
1999 r = netdev_set_ecmd(dev, &ecmd);
2000 spin_unlock_irq(&np->lock);
2003 /* get wake-on-lan */
2004 case ETHTOOL_GWOL: {
2005 struct ethtool_wolinfo wol = {ETHTOOL_GWOL};
2006 spin_lock_irq(&np->lock);
2007 netdev_get_wol(dev, &wol.supported, &wol.wolopts);
2008 netdev_get_sopass(dev, wol.sopass);
2009 spin_unlock_irq(&np->lock);
2010 if (copy_to_user(useraddr, &wol, sizeof(wol)))
2014 /* set wake-on-lan */
2015 case ETHTOOL_SWOL: {
2016 struct ethtool_wolinfo wol;
2018 if (copy_from_user(&wol, useraddr, sizeof(wol)))
2020 spin_lock_irq(&np->lock);
2021 netdev_set_wol(dev, wol.wolopts);
2022 r = netdev_set_sopass(dev, wol.sopass);
2023 spin_unlock_irq(&np->lock);
2027 case ETHTOOL_GREGS: {
2028 struct ethtool_regs regs;
2029 u8 regbuf[NATSEMI_REGS_SIZE];
2032 if (copy_from_user(®s, useraddr, sizeof(regs)))
2035 if (regs.len > NATSEMI_REGS_SIZE) {
2036 regs.len = NATSEMI_REGS_SIZE;
2038 regs.version = NATSEMI_REGS_VER;
2039 if (copy_to_user(useraddr, ®s, sizeof(regs)))
2042 useraddr += offsetof(struct ethtool_regs, data);
2044 spin_lock_irq(&np->lock);
2045 r = netdev_get_regs(dev, regbuf);
2046 spin_unlock_irq(&np->lock);
2050 if (copy_to_user(useraddr, regbuf, regs.len))
2054 /* get message-level */
2055 case ETHTOOL_GMSGLVL: {
2056 struct ethtool_value edata = {ETHTOOL_GMSGLVL};
2057 edata.data = np->msg_enable;
2058 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2062 /* set message-level */
2063 case ETHTOOL_SMSGLVL: {
2064 struct ethtool_value edata;
2065 if (copy_from_user(&edata, useraddr, sizeof(edata)))
2067 np->msg_enable = edata.data;
2070 /* restart autonegotiation */
2071 case ETHTOOL_NWAY_RST: {
2074 /* if autoneg is off, it's an error */
2075 tmp = mdio_read(dev, 1, MII_BMCR);
2076 if (tmp & BMCR_ANENABLE) {
2077 tmp |= (BMCR_ANRESTART);
2078 mdio_write(dev, 1, MII_BMCR, tmp);
2083 /* get link status */
2084 case ETHTOOL_GLINK: {
2085 struct ethtool_value edata = {ETHTOOL_GLINK};
2086 /* LSTATUS is latched low until a read - so read twice */
2087 mdio_read(dev, 1, MII_BMSR);
2088 edata.data = (mdio_read(dev, 1, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
2089 if (copy_to_user(useraddr, &edata, sizeof(edata)))
2094 case ETHTOOL_GEEPROM: {
2095 struct ethtool_eeprom eeprom;
2096 u8 eebuf[NATSEMI_EEPROM_SIZE];
2099 if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
2102 if (eeprom.offset > eeprom.offset+eeprom.len)
2105 if ((eeprom.offset+eeprom.len) > NATSEMI_EEPROM_SIZE) {
2106 eeprom.len = NATSEMI_EEPROM_SIZE-eeprom.offset;
2108 eeprom.magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
2109 if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
2112 useraddr += offsetof(struct ethtool_eeprom, data);
2114 spin_lock_irq(&np->lock);
2115 r = netdev_get_eeprom(dev, eebuf);
2116 spin_unlock_irq(&np->lock);
2120 if (copy_to_user(useraddr, eebuf+eeprom.offset, eeprom.len))
2130 static int netdev_set_wol(struct net_device *dev, u32 newval)
2132 struct netdev_private *np = dev->priv;
2133 u32 data = readl(dev->base_addr + WOLCmd) & ~WakeOptsSummary;
2135 /* translate to bitmasks this chip understands */
2136 if (newval & WAKE_PHY)
2138 if (newval & WAKE_UCAST)
2139 data |= WakeUnicast;
2140 if (newval & WAKE_MCAST)
2141 data |= WakeMulticast;
2142 if (newval & WAKE_BCAST)
2143 data |= WakeBroadcast;
2144 if (newval & WAKE_ARP)
2146 if (newval & WAKE_MAGIC)
2148 if (np->srr >= SRR_DP83815_D) {
2149 if (newval & WAKE_MAGICSECURE) {
2150 data |= WakeMagicSecure;
2154 writel(data, dev->base_addr + WOLCmd);
2159 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
2161 struct netdev_private *np = dev->priv;
2162 u32 regval = readl(dev->base_addr + WOLCmd);
2164 *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
2165 | WAKE_ARP | WAKE_MAGIC);
2167 if (np->srr >= SRR_DP83815_D) {
2168 /* SOPASS works on revD and higher */
2169 *supported |= WAKE_MAGICSECURE;
2173 /* translate from chip bitmasks */
2174 if (regval & WakePhy)
2176 if (regval & WakeUnicast)
2178 if (regval & WakeMulticast)
2180 if (regval & WakeBroadcast)
2182 if (regval & WakeArp)
2184 if (regval & WakeMagic)
2186 if (regval & WakeMagicSecure) {
2187 /* this can be on in revC, but it's broken */
2188 *cur |= WAKE_MAGICSECURE;
2194 static int netdev_set_sopass(struct net_device *dev, u8 *newval)
2196 struct netdev_private *np = dev->priv;
2197 u16 *sval = (u16 *)newval;
2200 if (np->srr < SRR_DP83815_D) {
2204 /* enable writing to these registers by disabling the RX filter */
2205 addr = readl(dev->base_addr + RxFilterAddr) & ~RFCRAddressMask;
2206 addr &= ~RxFilterEnable;
2207 writel(addr, dev->base_addr + RxFilterAddr);
2209 /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
2210 writel(addr | 0xa, dev->base_addr + RxFilterAddr);
2211 writew(sval[0], dev->base_addr + RxFilterData);
2213 writel(addr | 0xc, dev->base_addr + RxFilterAddr);
2214 writew(sval[1], dev->base_addr + RxFilterData);
2216 writel(addr | 0xe, dev->base_addr + RxFilterAddr);
2217 writew(sval[2], dev->base_addr + RxFilterData);
2219 /* re-enable the RX filter */
2220 writel(addr | RxFilterEnable, dev->base_addr + RxFilterAddr);
2225 static int netdev_get_sopass(struct net_device *dev, u8 *data)
2227 struct netdev_private *np = dev->priv;
2228 u16 *sval = (u16 *)data;
2231 if (np->srr < SRR_DP83815_D) {
2232 sval[0] = sval[1] = sval[2] = 0;
2236 /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
2237 addr = readl(dev->base_addr + RxFilterAddr) & ~RFCRAddressMask;
2239 writel(addr | 0xa, dev->base_addr + RxFilterAddr);
2240 sval[0] = readw(dev->base_addr + RxFilterData);
2242 writel(addr | 0xc, dev->base_addr + RxFilterAddr);
2243 sval[1] = readw(dev->base_addr + RxFilterData);
2245 writel(addr | 0xe, dev->base_addr + RxFilterAddr);
2246 sval[2] = readw(dev->base_addr + RxFilterData);
2248 writel(addr, dev->base_addr + RxFilterAddr);
2253 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2258 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2259 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2260 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
2262 /* only supports twisted-pair or MII */
2263 tmp = readl(dev->base_addr + ChipConfig);
2264 if (tmp & CfgExtPhy)
2265 ecmd->port = PORT_MII;
2267 ecmd->port = PORT_TP;
2269 /* only supports internal transceiver */
2270 ecmd->transceiver = XCVR_INTERNAL;
2272 /* not sure what this is for */
2273 ecmd->phy_address = readw(dev->base_addr + PhyCtrl) & PhyAddrMask;
2275 ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
2276 tmp = mdio_read(dev, 1, MII_ADVERTISE);
2277 if (tmp & ADVERTISE_10HALF)
2278 ecmd->advertising |= ADVERTISED_10baseT_Half;
2279 if (tmp & ADVERTISE_10FULL)
2280 ecmd->advertising |= ADVERTISED_10baseT_Full;
2281 if (tmp & ADVERTISE_100HALF)
2282 ecmd->advertising |= ADVERTISED_100baseT_Half;
2283 if (tmp & ADVERTISE_100FULL)
2284 ecmd->advertising |= ADVERTISED_100baseT_Full;
2286 tmp = mdio_read(dev, 1, MII_BMCR);
2287 if (tmp & BMCR_ANENABLE) {
2288 ecmd->advertising |= ADVERTISED_Autoneg;
2289 ecmd->autoneg = AUTONEG_ENABLE;
2291 ecmd->autoneg = AUTONEG_DISABLE;
2294 tmp = readl(dev->base_addr + ChipConfig);
2295 if (tmp & CfgSpeed100) {
2296 ecmd->speed = SPEED_100;
2298 ecmd->speed = SPEED_10;
2301 if (tmp & CfgFullDuplex) {
2302 ecmd->duplex = DUPLEX_FULL;
2304 ecmd->duplex = DUPLEX_HALF;
2307 /* ignore maxtxpkt, maxrxpkt for now */
2312 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2314 struct netdev_private *np = dev->priv;
2317 if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
2319 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
2321 if (ecmd->port != PORT_TP && ecmd->port != PORT_MII)
2323 if (ecmd->transceiver != XCVR_INTERNAL)
2325 if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
2327 /* ignore phy_address, maxtxpkt, maxrxpkt for now */
2329 /* WHEW! now lets bang some bits */
2331 tmp = mdio_read(dev, 1, MII_BMCR);
2332 if (ecmd->autoneg == AUTONEG_ENABLE) {
2333 /* turn on autonegotiation */
2334 tmp |= BMCR_ANENABLE;
2335 np->advertising = mdio_read(dev, 1, MII_ADVERTISE);
2337 /* turn off auto negotiation, set speed and duplexity */
2338 tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
2339 if (ecmd->speed == SPEED_100)
2340 tmp |= BMCR_SPEED100;
2341 if (ecmd->duplex == DUPLEX_FULL)
2342 tmp |= BMCR_FULLDPLX;
2344 np->full_duplex = 0;
2346 mdio_write(dev, 1, MII_BMCR, tmp);
2350 static int netdev_get_regs(struct net_device *dev, u8 *buf)
2355 u32 *rbuf = (u32 *)buf;
2357 /* read all of page 0 of registers */
2358 for (i = 0; i < NATSEMI_PG0_NREGS; i++) {
2359 rbuf[i] = readl(dev->base_addr + i*4);
2362 /* read only the 'magic' registers from page 1 */
2363 writew(1, dev->base_addr + PGSEL);
2364 rbuf[i++] = readw(dev->base_addr + PMDCSR);
2365 rbuf[i++] = readw(dev->base_addr + TSTDAT);
2366 rbuf[i++] = readw(dev->base_addr + DSPCFG);
2367 rbuf[i++] = readw(dev->base_addr + SDCFG);
2368 writew(0, dev->base_addr + PGSEL);
2370 /* read RFCR indexed registers */
2371 rfcr = readl(dev->base_addr + RxFilterAddr);
2372 for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
2373 writel(j*2, dev->base_addr + RxFilterAddr);
2374 rbuf[i++] = readw(dev->base_addr + RxFilterData);
2376 writel(rfcr, dev->base_addr + RxFilterAddr);
2378 /* the interrupt status is clear-on-read - see if we missed any */
2379 if (rbuf[4] & rbuf[5]) {
2381 "%s: shoot, we dropped an interrupt (%#08x)\n",
2382 dev->name, rbuf[4] & rbuf[5]);
2388 #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \
2389 | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \
2390 | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \
2391 | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \
2392 | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \
2393 | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \
2394 | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \
2395 | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) )
2397 static int netdev_get_eeprom(struct net_device *dev, u8 *buf)
2400 u16 *ebuf = (u16 *)buf;
2402 /* eeprom_read reads 16 bits, and indexes by 16 bits */
2403 for (i = 0; i < NATSEMI_EEPROM_SIZE/2; i++) {
2404 ebuf[i] = eeprom_read(dev->base_addr, i);
2405 /* The EEPROM itself stores data bit-swapped, but eeprom_read
2406 * reads it back "sanely". So we swap it back here in order to
2407 * present it to userland as it is stored. */
2408 ebuf[i] = SWAP_BITS(ebuf[i]);
2413 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2415 struct mii_ioctl_data *data = if_mii(rq);
2419 return netdev_ethtool_ioctl(dev, rq->ifr_data);
2420 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
2421 case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
2425 case SIOCGMIIREG: /* Read MII PHY register. */
2426 case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
2427 data->val_out = mdio_read(dev, data->phy_id & 0x1f,
2428 data->reg_num & 0x1f);
2431 case SIOCSMIIREG: /* Write MII PHY register. */
2432 case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
2433 if (!capable(CAP_NET_ADMIN))
2435 mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f,
2443 static void enable_wol_mode(struct net_device *dev, int enable_intr)
2445 long ioaddr = dev->base_addr;
2446 struct netdev_private *np = dev->priv;
2448 if (netif_msg_wol(np))
2449 printk(KERN_INFO "%s: remaining active for wake-on-lan\n",
2452 /* For WOL we must restart the rx process in silent mode.
2453 * Write NULL to the RxRingPtr. Only possible if
2454 * rx process is stopped
2456 writel(0, ioaddr + RxRingPtr);
2458 /* read WoL status to clear */
2459 readl(ioaddr + WOLCmd);
2461 /* PME on, clear status */
2462 writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun);
2464 /* and restart the rx process */
2465 writel(RxOn, ioaddr + ChipCmd);
2468 /* enable the WOL interrupt.
2469 * Could be used to send a netlink message.
2471 writel(WOLPkt | LinkChange, ioaddr + IntrMask);
2472 writel(1, ioaddr + IntrEnable);
2476 static int netdev_close(struct net_device *dev)
2478 long ioaddr = dev->base_addr;
2479 struct netdev_private *np = dev->priv;
2481 if (netif_msg_ifdown(np))
2483 "%s: Shutting down ethercard, status was %#04x.\n",
2484 dev->name, (int)readl(ioaddr + ChipCmd));
2485 if (netif_msg_pktdata(np))
2487 "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
2488 dev->name, np->cur_tx, np->dirty_tx,
2489 np->cur_rx, np->dirty_rx);
2492 * FIXME: what if someone tries to close a device
2493 * that is suspended?
2494 * Should we reenable the nic to switch to
2495 * the final WOL settings?
2498 del_timer_sync(&np->timer);
2499 disable_irq(dev->irq);
2500 spin_lock_irq(&np->lock);
2501 /* Disable interrupts, and flush posted writes */
2502 writel(0, ioaddr + IntrEnable);
2503 readl(ioaddr + IntrEnable);
2505 spin_unlock_irq(&np->lock);
2506 enable_irq(dev->irq);
2508 free_irq(dev->irq, dev);
2510 /* Interrupt disabled, interrupt handler released,
2511 * queue stopped, timer deleted, rtnl_lock held
2512 * All async codepaths that access the driver are disabled.
2514 spin_lock_irq(&np->lock);
2516 readl(ioaddr + IntrMask);
2517 readw(ioaddr + MIntrStatus);
2520 writel(StatsFreeze, ioaddr + StatsCtrl);
2522 /* Stop the chip's Tx and Rx processes. */
2523 natsemi_stop_rxtx(dev);
2526 spin_unlock_irq(&np->lock);
2528 /* clear the carrier last - an interrupt could reenable it otherwise */
2529 netif_carrier_off(dev);
2530 netif_stop_queue(dev);
2537 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
2539 /* restart the NIC in WOL mode.
2540 * The nic must be stopped for this.
2542 enable_wol_mode(dev, 0);
2544 /* Restore PME enable bit unmolested */
2545 writel(np->SavedClkRun, ioaddr + ClkRun);
2552 static void __devexit natsemi_remove1 (struct pci_dev *pdev)
2554 struct net_device *dev = pci_get_drvdata(pdev);
2556 unregister_netdev (dev);
2557 pci_release_regions (pdev);
2558 iounmap ((char *) dev->base_addr);
2560 pci_set_drvdata(pdev, NULL);
2566 * The ns83815 chip doesn't have explicit RxStop bits.
2567 * Kicking the Rx or Tx process for a new packet reenables the Rx process
2568 * of the nic, thus this function must be very careful:
2570 * suspend/resume synchronization:
2572 * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
2573 * start_tx, tx_timeout
2575 * No function accesses the hardware without checking np->hands_off.
2576 * the check occurs under spin_lock_irq(&np->lock);
2578 * * netdev_ioctl: noncritical access.
2579 * * netdev_open: cannot happen due to the device_detach
2580 * * netdev_close: doesn't hurt.
2581 * * netdev_timer: timer stopped by natsemi_suspend.
2582 * * intr_handler: doesn't acquire the spinlock. suspend calls
2583 * disable_irq() to enforce synchronization.
2585 * Interrupts must be disabled, otherwise hands_off can cause irq storms.
2588 static int natsemi_suspend (struct pci_dev *pdev, u32 state)
2590 struct net_device *dev = pci_get_drvdata (pdev);
2591 struct netdev_private *np = dev->priv;
2592 long ioaddr = dev->base_addr;
2595 if (netif_running (dev)) {
2596 del_timer_sync(&np->timer);
2598 disable_irq(dev->irq);
2599 spin_lock_irq(&np->lock);
2601 writel(0, ioaddr + IntrEnable);
2603 natsemi_stop_rxtx(dev);
2604 netif_stop_queue(dev);
2606 spin_unlock_irq(&np->lock);
2607 enable_irq(dev->irq);
2609 /* Update the error counts. */
2612 /* pci_power_off(pdev, -1); */
2615 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
2616 /* Restore PME enable bit */
2618 /* restart the NIC in WOL mode.
2619 * The nic must be stopped for this.
2620 * FIXME: use the WOL interrupt
2622 enable_wol_mode(dev, 0);
2624 /* Restore PME enable bit unmolested */
2625 writel(np->SavedClkRun, ioaddr + ClkRun);
2629 netif_device_detach(dev);
2635 static int natsemi_resume (struct pci_dev *pdev)
2637 struct net_device *dev = pci_get_drvdata (pdev);
2638 struct netdev_private *np = dev->priv;
2641 if (netif_device_present(dev))
2643 if (netif_running(dev)) {
2644 BUG_ON(!np->hands_off);
2645 pci_enable_device(pdev);
2646 /* pci_power_on(pdev); */
2650 disable_irq(dev->irq);
2651 spin_lock_irq(&np->lock);
2653 init_registers(dev);
2654 netif_device_attach(dev);
2655 spin_unlock_irq(&np->lock);
2656 enable_irq(dev->irq);
2658 mod_timer(&np->timer, jiffies + 1*HZ);
2660 netif_device_attach(dev);
2666 #endif /* CONFIG_PM */
2668 static struct pci_driver natsemi_driver = {
2670 .id_table = natsemi_pci_tbl,
2671 .probe = natsemi_probe1,
2672 .remove = __devexit_p(natsemi_remove1),
2674 .suspend = natsemi_suspend,
2675 .resume = natsemi_resume,
2679 static int __init natsemi_init_mod (void)
2681 /* when a module, this is printed whether or not devices are found in probe */
2686 return pci_module_init (&natsemi_driver);
2689 static void __exit natsemi_exit_mod (void)
2691 pci_unregister_driver (&natsemi_driver);
2694 module_init(natsemi_init_mod);
2695 module_exit(natsemi_exit_mod);