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)
6 Portions copyright 2004 Harald Welte <laforge@gnumonks.org>
8 This software may be used and distributed according to the terms of
9 the GNU General Public License (GPL), incorporated herein by reference.
10 Drivers based on or derived from this code fall under the GPL and must
11 retain the authorship, copyright and license notice. This file is not
12 a complete program and may only be used when the entire operating
13 system is licensed under the GPL. License for under other terms may be
14 available. Contact the original author for details.
16 The original author may be reached as becker@scyld.com, or at
17 Scyld Computing Corporation
18 410 Severn Ave., Suite 210
21 Support information and updates available at
22 http://www.scyld.com/network/netsemi.html
23 [link no longer provides useful info -jgarzik]
27 * big endian support with CFG:BEM instead of cpu_to_le32
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/string.h>
33 #include <linux/timer.h>
34 #include <linux/errno.h>
35 #include <linux/ioport.h>
36 #include <linux/slab.h>
37 #include <linux/interrupt.h>
38 #include <linux/pci.h>
39 #include <linux/netdevice.h>
40 #include <linux/etherdevice.h>
41 #include <linux/skbuff.h>
42 #include <linux/init.h>
43 #include <linux/spinlock.h>
44 #include <linux/ethtool.h>
45 #include <linux/delay.h>
46 #include <linux/rtnetlink.h>
47 #include <linux/mii.h>
48 #include <linux/crc32.h>
49 #include <linux/bitops.h>
50 #include <linux/prefetch.h>
51 #include <asm/processor.h> /* Processor type for cache alignment. */
54 #include <asm/uaccess.h>
56 #define DRV_NAME "natsemi"
57 #define DRV_VERSION "2.1"
58 #define DRV_RELDATE "Sept 11, 2006"
62 /* Updated to recommendations in pci-skeleton v2.03. */
64 /* The user-configurable values.
65 These may be modified when a driver module is loaded.*/
67 #define NATSEMI_DEF_MSG (NETIF_MSG_DRV | \
72 static int debug = -1;
76 /* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
77 This chip uses a 512 element hash table based on the Ethernet CRC. */
78 static const int multicast_filter_limit = 100;
80 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
81 Setting to > 1518 effectively disables this feature. */
82 static int rx_copybreak;
84 static int dspcfg_workaround = 1;
86 /* Used to pass the media type, etc.
87 Both 'options[]' and 'full_duplex[]' should exist for driver
89 The media type is usually passed in 'options[]'.
91 #define MAX_UNITS 8 /* More are supported, limit only on options */
92 static int options[MAX_UNITS];
93 static int full_duplex[MAX_UNITS];
95 /* Operational parameters that are set at compile time. */
97 /* Keep the ring sizes a power of two for compile efficiency.
98 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
99 Making the Tx ring too large decreases the effectiveness of channel
100 bonding and packet priority.
101 There are no ill effects from too-large receive rings. */
102 #define TX_RING_SIZE 16
103 #define TX_QUEUE_LEN 10 /* Limit ring entries actually used, min 4. */
104 #define RX_RING_SIZE 32
106 /* Operational parameters that usually are not changed. */
107 /* Time in jiffies before concluding the transmitter is hung. */
108 #define TX_TIMEOUT (2*HZ)
110 #define NATSEMI_HW_TIMEOUT 400
111 #define NATSEMI_TIMER_FREQ 3*HZ
112 #define NATSEMI_PG0_NREGS 64
113 #define NATSEMI_RFDR_NREGS 8
114 #define NATSEMI_PG1_NREGS 4
115 #define NATSEMI_NREGS (NATSEMI_PG0_NREGS + NATSEMI_RFDR_NREGS + \
117 #define NATSEMI_REGS_VER 1 /* v1 added RFDR registers */
118 #define NATSEMI_REGS_SIZE (NATSEMI_NREGS * sizeof(u32))
121 * The nic writes 32-bit values, even if the upper bytes of
122 * a 32-bit value are beyond the end of the buffer.
124 #define NATSEMI_HEADERS 22 /* 2*mac,type,vlan,crc */
125 #define NATSEMI_PADDING 16 /* 2 bytes should be sufficient */
126 #define NATSEMI_LONGPKT 1518 /* limit for normal packets */
127 #define NATSEMI_RX_LIMIT 2046 /* maximum supported by hardware */
129 /* These identify the driver base version and may not be removed. */
130 static const char version[] __devinitdata =
131 KERN_INFO DRV_NAME " dp8381x driver, version "
132 DRV_VERSION ", " DRV_RELDATE "\n"
133 KERN_INFO " originally by Donald Becker <becker@scyld.com>\n"
134 KERN_INFO " 2.4.x kernel port by Jeff Garzik, Tjeerd Mulder\n";
136 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
137 MODULE_DESCRIPTION("National Semiconductor DP8381x series PCI Ethernet driver");
138 MODULE_LICENSE("GPL");
140 module_param(mtu, int, 0);
141 module_param(debug, int, 0);
142 module_param(rx_copybreak, int, 0);
143 module_param(dspcfg_workaround, int, 1);
144 module_param_array(options, int, NULL, 0);
145 module_param_array(full_duplex, int, NULL, 0);
146 MODULE_PARM_DESC(mtu, "DP8381x MTU (all boards)");
147 MODULE_PARM_DESC(debug, "DP8381x default debug level");
148 MODULE_PARM_DESC(rx_copybreak,
149 "DP8381x copy breakpoint for copy-only-tiny-frames");
150 MODULE_PARM_DESC(dspcfg_workaround, "DP8381x: control DspCfg workaround");
151 MODULE_PARM_DESC(options,
152 "DP8381x: Bits 0-3: media type, bit 17: full duplex");
153 MODULE_PARM_DESC(full_duplex, "DP8381x full duplex setting(s) (1)");
158 I. Board Compatibility
160 This driver is designed for National Semiconductor DP83815 PCI Ethernet NIC.
161 It also works with other chips in in the DP83810 series.
163 II. Board-specific settings
165 This driver requires the PCI interrupt line to be valid.
166 It honors the EEPROM-set values.
168 III. Driver operation
172 This driver uses two statically allocated fixed-size descriptor lists
173 formed into rings by a branch from the final descriptor to the beginning of
174 the list. The ring sizes are set at compile time by RX/TX_RING_SIZE.
175 The NatSemi design uses a 'next descriptor' pointer that the driver forms
178 IIIb/c. Transmit/Receive Structure
180 This driver uses a zero-copy receive and transmit scheme.
181 The driver allocates full frame size skbuffs for the Rx ring buffers at
182 open() time and passes the skb->data field to the chip as receive data
183 buffers. When an incoming frame is less than RX_COPYBREAK bytes long,
184 a fresh skbuff is allocated and the frame is copied to the new skbuff.
185 When the incoming frame is larger, the skbuff is passed directly up the
186 protocol stack. Buffers consumed this way are replaced by newly allocated
187 skbuffs in a later phase of receives.
189 The RX_COPYBREAK value is chosen to trade-off the memory wasted by
190 using a full-sized skbuff for small frames vs. the copying costs of larger
191 frames. New boards are typically used in generously configured machines
192 and the underfilled buffers have negligible impact compared to the benefit of
193 a single allocation size, so the default value of zero results in never
194 copying packets. When copying is done, the cost is usually mitigated by using
195 a combined copy/checksum routine. Copying also preloads the cache, which is
196 most useful with small frames.
198 A subtle aspect of the operation is that unaligned buffers are not permitted
199 by the hardware. Thus the IP header at offset 14 in an ethernet frame isn't
200 longword aligned for further processing. On copies frames are put into the
201 skbuff at an offset of "+2", 16-byte aligning the IP header.
203 IIId. Synchronization
205 Most operations are synchronized on the np->lock irq spinlock, except the
206 performance critical codepaths:
208 The rx process only runs in the interrupt handler. Access from outside
209 the interrupt handler is only permitted after disable_irq().
211 The rx process usually runs under the netif_tx_lock. If np->intr_tx_reap
212 is set, then access is permitted under spin_lock_irq(&np->lock).
214 Thus configuration functions that want to access everything must call
215 disable_irq(dev->irq);
216 netif_tx_lock_bh(dev);
217 spin_lock_irq(&np->lock);
221 NatSemi PCI network controllers are very uncommon.
225 http://www.scyld.com/expert/100mbps.html
226 http://www.scyld.com/expert/NWay.html
227 Datasheet is available from:
228 http://www.national.com/pf/DP/DP83815.html
238 * Support for fibre connections on Am79C874:
239 * This phy needs a special setup when connected to a fibre cable.
240 * http://www.amd.com/files/connectivitysolutions/networking/archivednetworking/22235.pdf
242 #define PHYID_AM79C874 0x0022561b
245 MII_MCTRL = 0x15, /* mode control register */
246 MII_FX_SEL = 0x0001, /* 100BASE-FX (fiber) */
247 MII_EN_SCRM = 0x0004, /* enable scrambler (tp) */
251 NATSEMI_FLAG_IGNORE_PHY = 0x1,
254 /* array of board data directly indexed by pci_tbl[x].driver_data */
255 static const struct {
258 unsigned int eeprom_size;
259 } natsemi_pci_info[] __devinitdata = {
260 { "Aculab E1/T1 PMXc cPCI carrier card", NATSEMI_FLAG_IGNORE_PHY, 128 },
261 { "NatSemi DP8381[56]", 0, 24 },
264 static const struct pci_device_id natsemi_pci_tbl[] __devinitdata = {
265 { PCI_VENDOR_ID_NS, 0x0020, 0x12d9, 0x000c, 0, 0, 0 },
266 { PCI_VENDOR_ID_NS, 0x0020, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
267 { } /* terminate list */
269 MODULE_DEVICE_TABLE(pci, natsemi_pci_tbl);
271 /* Offsets to the device registers.
272 Unlike software-only systems, device drivers interact with complex hardware.
273 It's not useful to define symbolic names for every register bit in the
276 enum register_offsets {
284 IntrHoldoff = 0x1C, /* DP83816 only */
311 /* These are from the spec, around page 78... on a separate table.
312 * The meaning of these registers depend on the value of PGSEL. */
319 /* the values for the 'magic' registers above (PGSEL=1) */
320 #define PMDCSR_VAL 0x189c /* enable preferred adaptation circuitry */
321 #define TSTDAT_VAL 0x0
322 #define DSPCFG_VAL 0x5040
323 #define SDCFG_VAL 0x008c /* set voltage thresholds for Signal Detect */
324 #define DSPCFG_LOCK 0x20 /* coefficient lock bit in DSPCFG */
325 #define DSPCFG_COEF 0x1000 /* see coefficient (in TSTDAT) bit in DSPCFG */
326 #define TSTDAT_FIXED 0xe8 /* magic number for bad coefficients */
328 /* misc PCI space registers */
329 enum pci_register_offsets {
343 enum ChipConfig_bits {
347 CfgAnegEnable = 0x2000,
349 CfgAnegFull = 0x8000,
350 CfgAnegDone = 0x8000000,
351 CfgFullDuplex = 0x20000000,
352 CfgSpeed100 = 0x40000000,
353 CfgLink = 0x80000000,
359 EE_ChipSelect = 0x08,
366 enum PCIBusCfg_bits {
370 /* Bits in the interrupt status/mask registers. */
371 enum IntrStatus_bits {
375 IntrRxEarly = 0x0008,
377 IntrRxOverrun = 0x0020,
382 IntrTxUnderrun = 0x0400,
387 IntrHighBits = 0x8000,
388 RxStatusFIFOOver = 0x10000,
389 IntrPCIErr = 0xf00000,
390 RxResetDone = 0x1000000,
391 TxResetDone = 0x2000000,
392 IntrAbnormalSummary = 0xCD20,
396 * Default Interrupts:
397 * Rx OK, Rx Packet Error, Rx Overrun,
398 * Tx OK, Tx Packet Error, Tx Underrun,
399 * MIB Service, Phy Interrupt, High Bits,
400 * Rx Status FIFO overrun,
401 * Received Target Abort, Received Master Abort,
402 * Signalled System Error, Received Parity Error
404 #define DEFAULT_INTR 0x00f1cd65
409 TxMxdmaMask = 0x700000,
411 TxMxdma_4 = 0x100000,
412 TxMxdma_8 = 0x200000,
413 TxMxdma_16 = 0x300000,
414 TxMxdma_32 = 0x400000,
415 TxMxdma_64 = 0x500000,
416 TxMxdma_128 = 0x600000,
417 TxMxdma_256 = 0x700000,
418 TxCollRetry = 0x800000,
419 TxAutoPad = 0x10000000,
420 TxMacLoop = 0x20000000,
421 TxHeartIgn = 0x40000000,
422 TxCarrierIgn = 0x80000000
427 * - 256 byte DMA burst length
428 * - fill threshold 512 bytes (i.e. restart DMA when 512 bytes are free)
429 * - 64 bytes initial drain threshold (i.e. begin actual transmission
430 * when 64 byte are in the fifo)
431 * - on tx underruns, increase drain threshold by 64.
432 * - at most use a drain threshold of 1472 bytes: The sum of the fill
433 * threshold and the drain threshold must be less than 2016 bytes.
436 #define TX_FLTH_VAL ((512/32) << 8)
437 #define TX_DRTH_VAL_START (64/32)
438 #define TX_DRTH_VAL_INC 2
439 #define TX_DRTH_VAL_LIMIT (1472/32)
443 RxMxdmaMask = 0x700000,
445 RxMxdma_4 = 0x100000,
446 RxMxdma_8 = 0x200000,
447 RxMxdma_16 = 0x300000,
448 RxMxdma_32 = 0x400000,
449 RxMxdma_64 = 0x500000,
450 RxMxdma_128 = 0x600000,
451 RxMxdma_256 = 0x700000,
452 RxAcceptLong = 0x8000000,
453 RxAcceptTx = 0x10000000,
454 RxAcceptRunt = 0x40000000,
455 RxAcceptErr = 0x80000000
457 #define RX_DRTH_VAL (128/8)
475 WakeMagicSecure = 0x400,
476 SecureHack = 0x100000,
478 WokeUnicast = 0x800000,
479 WokeMulticast = 0x1000000,
480 WokeBroadcast = 0x2000000,
482 WokePMatch0 = 0x8000000,
483 WokePMatch1 = 0x10000000,
484 WokePMatch2 = 0x20000000,
485 WokePMatch3 = 0x40000000,
486 WokeMagic = 0x80000000,
487 WakeOptsSummary = 0x7ff
490 enum RxFilterAddr_bits {
491 RFCRAddressMask = 0x3ff,
492 AcceptMulticast = 0x00200000,
493 AcceptMyPhys = 0x08000000,
494 AcceptAllPhys = 0x10000000,
495 AcceptAllMulticast = 0x20000000,
496 AcceptBroadcast = 0x40000000,
497 RxFilterEnable = 0x80000000
500 enum StatsCtrl_bits {
507 enum MIntrCtrl_bits {
515 #define PHY_ADDR_NONE 32
516 #define PHY_ADDR_INTERNAL 1
518 /* values we might find in the silicon revision register */
519 #define SRR_DP83815_C 0x0302
520 #define SRR_DP83815_D 0x0403
521 #define SRR_DP83816_A4 0x0504
522 #define SRR_DP83816_A5 0x0505
524 /* The Rx and Tx buffer descriptors. */
525 /* Note that using only 32 bit fields simplifies conversion to big-endian
534 /* Bits in network_desc.status */
535 enum desc_status_bits {
536 DescOwn=0x80000000, DescMore=0x40000000, DescIntr=0x20000000,
537 DescNoCRC=0x10000000, DescPktOK=0x08000000,
540 DescTxAbort=0x04000000, DescTxFIFO=0x02000000,
541 DescTxCarrier=0x01000000, DescTxDefer=0x00800000,
542 DescTxExcDefer=0x00400000, DescTxOOWCol=0x00200000,
543 DescTxExcColl=0x00100000, DescTxCollCount=0x000f0000,
545 DescRxAbort=0x04000000, DescRxOver=0x02000000,
546 DescRxDest=0x01800000, DescRxLong=0x00400000,
547 DescRxRunt=0x00200000, DescRxInvalid=0x00100000,
548 DescRxCRC=0x00080000, DescRxAlign=0x00040000,
549 DescRxLoop=0x00020000, DesRxColl=0x00010000,
552 struct netdev_private {
553 /* Descriptor rings first for alignment */
555 struct netdev_desc *rx_ring;
556 struct netdev_desc *tx_ring;
557 /* The addresses of receive-in-place skbuffs */
558 struct sk_buff *rx_skbuff[RX_RING_SIZE];
559 dma_addr_t rx_dma[RX_RING_SIZE];
560 /* address of a sent-in-place packet/buffer, for later free() */
561 struct sk_buff *tx_skbuff[TX_RING_SIZE];
562 dma_addr_t tx_dma[TX_RING_SIZE];
563 struct net_device_stats stats;
564 /* Media monitoring timer */
565 struct timer_list timer;
566 /* Frequently used values: keep some adjacent for cache effect */
567 struct pci_dev *pci_dev;
568 struct netdev_desc *rx_head_desc;
569 /* Producer/consumer ring indices */
570 unsigned int cur_rx, dirty_rx;
571 unsigned int cur_tx, dirty_tx;
572 /* Based on MTU+slack. */
573 unsigned int rx_buf_sz;
575 /* Interrupt status */
577 /* Do not touch the nic registers */
579 /* Don't pay attention to the reported link state. */
581 /* external phy that is used: only valid if dev->if_port != PORT_TP */
583 int phy_addr_external;
584 unsigned int full_duplex;
588 /* FIFO and PCI burst thresholds */
589 u32 tx_config, rx_config;
590 /* original contents of ClkRun register */
592 /* silicon revision */
594 /* expected DSPCFG value */
596 int dspcfg_workaround;
597 /* parms saved in ethtool format */
598 u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */
599 u8 duplex; /* Duplex, half or full */
600 u8 autoneg; /* Autonegotiation enabled */
601 /* MII transceiver section */
610 static void move_int_phy(struct net_device *dev, int addr);
611 static int eeprom_read(void __iomem *ioaddr, int location);
612 static int mdio_read(struct net_device *dev, int reg);
613 static void mdio_write(struct net_device *dev, int reg, u16 data);
614 static void init_phy_fixup(struct net_device *dev);
615 static int miiport_read(struct net_device *dev, int phy_id, int reg);
616 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data);
617 static int find_mii(struct net_device *dev);
618 static void natsemi_reset(struct net_device *dev);
619 static void natsemi_reload_eeprom(struct net_device *dev);
620 static void natsemi_stop_rxtx(struct net_device *dev);
621 static int netdev_open(struct net_device *dev);
622 static void do_cable_magic(struct net_device *dev);
623 static void undo_cable_magic(struct net_device *dev);
624 static void check_link(struct net_device *dev);
625 static void netdev_timer(unsigned long data);
626 static void dump_ring(struct net_device *dev);
627 static void tx_timeout(struct net_device *dev);
628 static int alloc_ring(struct net_device *dev);
629 static void refill_rx(struct net_device *dev);
630 static void init_ring(struct net_device *dev);
631 static void drain_tx(struct net_device *dev);
632 static void drain_ring(struct net_device *dev);
633 static void free_ring(struct net_device *dev);
634 static void reinit_ring(struct net_device *dev);
635 static void init_registers(struct net_device *dev);
636 static int start_tx(struct sk_buff *skb, struct net_device *dev);
637 static irqreturn_t intr_handler(int irq, void *dev_instance);
638 static void netdev_error(struct net_device *dev, int intr_status);
639 static int natsemi_poll(struct net_device *dev, int *budget);
640 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do);
641 static void netdev_tx_done(struct net_device *dev);
642 static int natsemi_change_mtu(struct net_device *dev, int new_mtu);
643 #ifdef CONFIG_NET_POLL_CONTROLLER
644 static void natsemi_poll_controller(struct net_device *dev);
646 static void __set_rx_mode(struct net_device *dev);
647 static void set_rx_mode(struct net_device *dev);
648 static void __get_stats(struct net_device *dev);
649 static struct net_device_stats *get_stats(struct net_device *dev);
650 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
651 static int netdev_set_wol(struct net_device *dev, u32 newval);
652 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur);
653 static int netdev_set_sopass(struct net_device *dev, u8 *newval);
654 static int netdev_get_sopass(struct net_device *dev, u8 *data);
655 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
656 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
657 static void enable_wol_mode(struct net_device *dev, int enable_intr);
658 static int netdev_close(struct net_device *dev);
659 static int netdev_get_regs(struct net_device *dev, u8 *buf);
660 static int netdev_get_eeprom(struct net_device *dev, u8 *buf);
661 static const struct ethtool_ops ethtool_ops;
663 #define NATSEMI_ATTR(_name) \
664 static ssize_t natsemi_show_##_name(struct device *dev, \
665 struct device_attribute *attr, char *buf); \
666 static ssize_t natsemi_set_##_name(struct device *dev, \
667 struct device_attribute *attr, \
668 const char *buf, size_t count); \
669 static DEVICE_ATTR(_name, 0644, natsemi_show_##_name, natsemi_set_##_name)
671 #define NATSEMI_CREATE_FILE(_dev, _name) \
672 device_create_file(&_dev->dev, &dev_attr_##_name)
673 #define NATSEMI_REMOVE_FILE(_dev, _name) \
674 device_create_file(&_dev->dev, &dev_attr_##_name)
676 NATSEMI_ATTR(dspcfg_workaround);
678 static ssize_t natsemi_show_dspcfg_workaround(struct device *dev,
679 struct device_attribute *attr,
682 struct netdev_private *np = netdev_priv(to_net_dev(dev));
684 return sprintf(buf, "%s\n", np->dspcfg_workaround ? "on" : "off");
687 static ssize_t natsemi_set_dspcfg_workaround(struct device *dev,
688 struct device_attribute *attr,
689 const char *buf, size_t count)
691 struct netdev_private *np = netdev_priv(to_net_dev(dev));
695 /* Find out the new setting */
696 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
698 else if (!strncmp("off", buf, count - 1)
699 || !strncmp("0", buf, count - 1))
704 spin_lock_irqsave(&np->lock, flags);
706 np->dspcfg_workaround = new_setting;
708 spin_unlock_irqrestore(&np->lock, flags);
713 static inline void __iomem *ns_ioaddr(struct net_device *dev)
715 return (void __iomem *) dev->base_addr;
718 static inline void natsemi_irq_enable(struct net_device *dev)
720 writel(1, ns_ioaddr(dev) + IntrEnable);
721 readl(ns_ioaddr(dev) + IntrEnable);
724 static inline void natsemi_irq_disable(struct net_device *dev)
726 writel(0, ns_ioaddr(dev) + IntrEnable);
727 readl(ns_ioaddr(dev) + IntrEnable);
730 static void move_int_phy(struct net_device *dev, int addr)
732 struct netdev_private *np = netdev_priv(dev);
733 void __iomem *ioaddr = ns_ioaddr(dev);
737 * The internal phy is visible on the external mii bus. Therefore we must
738 * move it away before we can send commands to an external phy.
739 * There are two addresses we must avoid:
740 * - the address on the external phy that is used for transmission.
741 * - the address that we want to access. User space can access phys
742 * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the
743 * phy that is used for transmission.
748 if (target == np->phy_addr_external)
750 writew(target, ioaddr + PhyCtrl);
751 readw(ioaddr + PhyCtrl);
755 static void __devinit natsemi_init_media (struct net_device *dev)
757 struct netdev_private *np = netdev_priv(dev);
761 netif_carrier_on(dev);
763 netif_carrier_off(dev);
765 /* get the initial settings from hardware */
766 tmp = mdio_read(dev, MII_BMCR);
767 np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10;
768 np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF;
769 np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE;
770 np->advertising= mdio_read(dev, MII_ADVERTISE);
772 if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL
773 && netif_msg_probe(np)) {
774 printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s "
776 pci_name(np->pci_dev),
777 (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)?
778 "enabled, advertise" : "disabled, force",
780 (ADVERTISE_100FULL|ADVERTISE_100HALF))?
783 (ADVERTISE_100FULL|ADVERTISE_10FULL))?
786 if (netif_msg_probe(np))
788 "natsemi %s: Transceiver status %#04x advertising %#04x.\n",
789 pci_name(np->pci_dev), mdio_read(dev, MII_BMSR),
794 static int __devinit natsemi_probe1 (struct pci_dev *pdev,
795 const struct pci_device_id *ent)
797 struct net_device *dev;
798 struct netdev_private *np;
799 int i, option, irq, chip_idx = ent->driver_data;
800 static int find_cnt = -1;
801 unsigned long iostart, iosize;
802 void __iomem *ioaddr;
803 const int pcibar = 1; /* PCI base address register */
807 /* when built into the kernel, we only print version if device is found */
809 static int printed_version;
810 if (!printed_version++)
814 i = pci_enable_device(pdev);
817 /* natsemi has a non-standard PM control register
818 * in PCI config space. Some boards apparently need
819 * to be brought to D0 in this manner.
821 pci_read_config_dword(pdev, PCIPM, &tmp);
822 if (tmp & PCI_PM_CTRL_STATE_MASK) {
823 /* D0 state, disable PME assertion */
824 u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK;
825 pci_write_config_dword(pdev, PCIPM, newtmp);
829 iostart = pci_resource_start(pdev, pcibar);
830 iosize = pci_resource_len(pdev, pcibar);
833 pci_set_master(pdev);
835 dev = alloc_etherdev(sizeof (struct netdev_private));
838 SET_MODULE_OWNER(dev);
839 SET_NETDEV_DEV(dev, &pdev->dev);
841 i = pci_request_regions(pdev, DRV_NAME);
843 goto err_pci_request_regions;
845 ioaddr = ioremap(iostart, iosize);
851 /* Work around the dropped serial bit. */
852 prev_eedata = eeprom_read(ioaddr, 6);
853 for (i = 0; i < 3; i++) {
854 int eedata = eeprom_read(ioaddr, i + 7);
855 dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15);
856 dev->dev_addr[i*2+1] = eedata >> 7;
857 prev_eedata = eedata;
860 dev->base_addr = (unsigned long __force) ioaddr;
863 np = netdev_priv(dev);
866 pci_set_drvdata(pdev, dev);
868 spin_lock_init(&np->lock);
869 np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
872 np->eeprom_size = natsemi_pci_info[chip_idx].eeprom_size;
873 if (natsemi_pci_info[chip_idx].flags & NATSEMI_FLAG_IGNORE_PHY)
877 np->dspcfg_workaround = dspcfg_workaround;
880 * - If configured to ignore the PHY set up for external.
881 * - If the nic was configured to use an external phy and if find_mii
882 * finds a phy: use external port, first phy that replies.
883 * - Otherwise: internal port.
884 * Note that the phy address for the internal phy doesn't matter:
885 * The address would be used to access a phy over the mii bus, but
886 * the internal phy is accessed through mapped registers.
888 if (np->ignore_phy || readl(ioaddr + ChipConfig) & CfgExtPhy)
889 dev->if_port = PORT_MII;
891 dev->if_port = PORT_TP;
892 /* Reset the chip to erase previous misconfiguration. */
893 natsemi_reload_eeprom(dev);
896 if (dev->if_port != PORT_TP) {
897 np->phy_addr_external = find_mii(dev);
898 /* If we're ignoring the PHY it doesn't matter if we can't
900 if (!np->ignore_phy && np->phy_addr_external == PHY_ADDR_NONE) {
901 dev->if_port = PORT_TP;
902 np->phy_addr_external = PHY_ADDR_INTERNAL;
905 np->phy_addr_external = PHY_ADDR_INTERNAL;
908 option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
910 option = dev->mem_start;
912 /* The lower four bits are the media type. */
918 "natsemi %s: ignoring user supplied media type %d",
919 pci_name(np->pci_dev), option & 15);
921 if (find_cnt < MAX_UNITS && full_duplex[find_cnt])
924 /* The chip-specific entries in the device structure. */
925 dev->open = &netdev_open;
926 dev->hard_start_xmit = &start_tx;
927 dev->stop = &netdev_close;
928 dev->get_stats = &get_stats;
929 dev->set_multicast_list = &set_rx_mode;
930 dev->change_mtu = &natsemi_change_mtu;
931 dev->do_ioctl = &netdev_ioctl;
932 dev->tx_timeout = &tx_timeout;
933 dev->watchdog_timeo = TX_TIMEOUT;
934 dev->poll = natsemi_poll;
937 #ifdef CONFIG_NET_POLL_CONTROLLER
938 dev->poll_controller = &natsemi_poll_controller;
940 SET_ETHTOOL_OPS(dev, ðtool_ops);
945 natsemi_init_media(dev);
947 /* save the silicon revision for later querying */
948 np->srr = readl(ioaddr + SiliconRev);
949 if (netif_msg_hw(np))
950 printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n",
951 pci_name(np->pci_dev), np->srr);
953 i = register_netdev(dev);
955 goto err_register_netdev;
957 if (NATSEMI_CREATE_FILE(pdev, dspcfg_workaround))
958 goto err_create_file;
960 if (netif_msg_drv(np)) {
961 printk(KERN_INFO "natsemi %s: %s at %#08lx (%s), ",
962 dev->name, natsemi_pci_info[chip_idx].name, iostart,
963 pci_name(np->pci_dev));
964 for (i = 0; i < ETH_ALEN-1; i++)
965 printk("%02x:", dev->dev_addr[i]);
966 printk("%02x, IRQ %d", dev->dev_addr[i], irq);
967 if (dev->if_port == PORT_TP)
968 printk(", port TP.\n");
969 else if (np->ignore_phy)
970 printk(", port MII, ignoring PHY\n");
972 printk(", port MII, phy ad %d.\n", np->phy_addr_external);
977 unregister_netdev(dev);
983 pci_release_regions(pdev);
984 pci_set_drvdata(pdev, NULL);
986 err_pci_request_regions:
992 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
993 The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */
995 /* Delay between EEPROM clock transitions.
996 No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
997 a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
998 made udelay() unreliable.
999 The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
1002 #define eeprom_delay(ee_addr) readl(ee_addr)
1004 #define EE_Write0 (EE_ChipSelect)
1005 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
1007 /* The EEPROM commands include the alway-set leading bit. */
1009 EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
1012 static int eeprom_read(void __iomem *addr, int location)
1016 void __iomem *ee_addr = addr + EECtrl;
1017 int read_cmd = location | EE_ReadCmd;
1019 writel(EE_Write0, ee_addr);
1021 /* Shift the read command bits out. */
1022 for (i = 10; i >= 0; i--) {
1023 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
1024 writel(dataval, ee_addr);
1025 eeprom_delay(ee_addr);
1026 writel(dataval | EE_ShiftClk, ee_addr);
1027 eeprom_delay(ee_addr);
1029 writel(EE_ChipSelect, ee_addr);
1030 eeprom_delay(ee_addr);
1032 for (i = 0; i < 16; i++) {
1033 writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
1034 eeprom_delay(ee_addr);
1035 retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0;
1036 writel(EE_ChipSelect, ee_addr);
1037 eeprom_delay(ee_addr);
1040 /* Terminate the EEPROM access. */
1041 writel(EE_Write0, ee_addr);
1046 /* MII transceiver control section.
1047 * The 83815 series has an internal transceiver, and we present the
1048 * internal management registers as if they were MII connected.
1049 * External Phy registers are referenced through the MII interface.
1052 /* clock transitions >= 20ns (25MHz)
1053 * One readl should be good to PCI @ 100MHz
1055 #define mii_delay(ioaddr) readl(ioaddr + EECtrl)
1057 static int mii_getbit (struct net_device *dev)
1060 void __iomem *ioaddr = ns_ioaddr(dev);
1062 writel(MII_ShiftClk, ioaddr + EECtrl);
1063 data = readl(ioaddr + EECtrl);
1064 writel(0, ioaddr + EECtrl);
1066 return (data & MII_Data)? 1 : 0;
1069 static void mii_send_bits (struct net_device *dev, u32 data, int len)
1072 void __iomem *ioaddr = ns_ioaddr(dev);
1074 for (i = (1 << (len-1)); i; i >>= 1)
1076 u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0);
1077 writel(mdio_val, ioaddr + EECtrl);
1079 writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl);
1082 writel(0, ioaddr + EECtrl);
1086 static int miiport_read(struct net_device *dev, int phy_id, int reg)
1093 mii_send_bits (dev, 0xffffffff, 32);
1094 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1095 /* ST,OP = 0110'b for read operation */
1096 cmd = (0x06 << 10) | (phy_id << 5) | reg;
1097 mii_send_bits (dev, cmd, 14);
1099 if (mii_getbit (dev))
1102 for (i = 0; i < 16; i++) {
1104 retval |= mii_getbit (dev);
1111 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data)
1116 mii_send_bits (dev, 0xffffffff, 32);
1117 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1118 /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */
1119 cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data;
1120 mii_send_bits (dev, cmd, 32);
1125 static int mdio_read(struct net_device *dev, int reg)
1127 struct netdev_private *np = netdev_priv(dev);
1128 void __iomem *ioaddr = ns_ioaddr(dev);
1130 /* The 83815 series has two ports:
1131 * - an internal transceiver
1132 * - an external mii bus
1134 if (dev->if_port == PORT_TP)
1135 return readw(ioaddr+BasicControl+(reg<<2));
1137 return miiport_read(dev, np->phy_addr_external, reg);
1140 static void mdio_write(struct net_device *dev, int reg, u16 data)
1142 struct netdev_private *np = netdev_priv(dev);
1143 void __iomem *ioaddr = ns_ioaddr(dev);
1145 /* The 83815 series has an internal transceiver; handle separately */
1146 if (dev->if_port == PORT_TP)
1147 writew(data, ioaddr+BasicControl+(reg<<2));
1149 miiport_write(dev, np->phy_addr_external, reg, data);
1152 static void init_phy_fixup(struct net_device *dev)
1154 struct netdev_private *np = netdev_priv(dev);
1155 void __iomem *ioaddr = ns_ioaddr(dev);
1160 /* restore stuff lost when power was out */
1161 tmp = mdio_read(dev, MII_BMCR);
1162 if (np->autoneg == AUTONEG_ENABLE) {
1163 /* renegotiate if something changed */
1164 if ((tmp & BMCR_ANENABLE) == 0
1165 || np->advertising != mdio_read(dev, MII_ADVERTISE))
1167 /* turn on autonegotiation and force negotiation */
1168 tmp |= (BMCR_ANENABLE | BMCR_ANRESTART);
1169 mdio_write(dev, MII_ADVERTISE, np->advertising);
1172 /* turn off auto negotiation, set speed and duplexity */
1173 tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
1174 if (np->speed == SPEED_100)
1175 tmp |= BMCR_SPEED100;
1176 if (np->duplex == DUPLEX_FULL)
1177 tmp |= BMCR_FULLDPLX;
1179 * Note: there is no good way to inform the link partner
1180 * that our capabilities changed. The user has to unplug
1181 * and replug the network cable after some changes, e.g.
1182 * after switching from 10HD, autoneg off to 100 HD,
1186 mdio_write(dev, MII_BMCR, tmp);
1187 readl(ioaddr + ChipConfig);
1190 /* find out what phy this is */
1191 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1192 + mdio_read(dev, MII_PHYSID2);
1194 /* handle external phys here */
1196 case PHYID_AM79C874:
1197 /* phy specific configuration for fibre/tp operation */
1198 tmp = mdio_read(dev, MII_MCTRL);
1199 tmp &= ~(MII_FX_SEL | MII_EN_SCRM);
1200 if (dev->if_port == PORT_FIBRE)
1204 mdio_write(dev, MII_MCTRL, tmp);
1209 cfg = readl(ioaddr + ChipConfig);
1210 if (cfg & CfgExtPhy)
1213 /* On page 78 of the spec, they recommend some settings for "optimum
1214 performance" to be done in sequence. These settings optimize some
1215 of the 100Mbit autodetection circuitry. They say we only want to
1216 do this for rev C of the chip, but engineers at NSC (Bradley
1217 Kennedy) recommends always setting them. If you don't, you get
1218 errors on some autonegotiations that make the device unusable.
1220 It seems that the DSP needs a few usec to reinitialize after
1221 the start of the phy. Just retry writing these values until they
1224 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1227 writew(1, ioaddr + PGSEL);
1228 writew(PMDCSR_VAL, ioaddr + PMDCSR);
1229 writew(TSTDAT_VAL, ioaddr + TSTDAT);
1230 np->dspcfg = (np->srr <= SRR_DP83815_C)?
1231 DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG));
1232 writew(np->dspcfg, ioaddr + DSPCFG);
1233 writew(SDCFG_VAL, ioaddr + SDCFG);
1234 writew(0, ioaddr + PGSEL);
1235 readl(ioaddr + ChipConfig);
1238 writew(1, ioaddr + PGSEL);
1239 dspcfg = readw(ioaddr + DSPCFG);
1240 writew(0, ioaddr + PGSEL);
1241 if (np->dspcfg == dspcfg)
1245 if (netif_msg_link(np)) {
1246 if (i==NATSEMI_HW_TIMEOUT) {
1248 "%s: DSPCFG mismatch after retrying for %d usec.\n",
1252 "%s: DSPCFG accepted after %d usec.\n",
1257 * Enable PHY Specific event based interrupts. Link state change
1258 * and Auto-Negotiation Completion are among the affected.
1259 * Read the intr status to clear it (needed for wake events).
1261 readw(ioaddr + MIntrStatus);
1262 writew(MICRIntEn, ioaddr + MIntrCtrl);
1265 static int switch_port_external(struct net_device *dev)
1267 struct netdev_private *np = netdev_priv(dev);
1268 void __iomem *ioaddr = ns_ioaddr(dev);
1271 cfg = readl(ioaddr + ChipConfig);
1272 if (cfg & CfgExtPhy)
1275 if (netif_msg_link(np)) {
1276 printk(KERN_INFO "%s: switching to external transceiver.\n",
1280 /* 1) switch back to external phy */
1281 writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig);
1282 readl(ioaddr + ChipConfig);
1285 /* 2) reset the external phy: */
1286 /* resetting the external PHY has been known to cause a hub supplying
1287 * power over Ethernet to kill the power. We don't want to kill
1288 * power to this computer, so we avoid resetting the phy.
1291 /* 3) reinit the phy fixup, it got lost during power down. */
1292 move_int_phy(dev, np->phy_addr_external);
1293 init_phy_fixup(dev);
1298 static int switch_port_internal(struct net_device *dev)
1300 struct netdev_private *np = netdev_priv(dev);
1301 void __iomem *ioaddr = ns_ioaddr(dev);
1306 cfg = readl(ioaddr + ChipConfig);
1307 if (!(cfg &CfgExtPhy))
1310 if (netif_msg_link(np)) {
1311 printk(KERN_INFO "%s: switching to internal transceiver.\n",
1314 /* 1) switch back to internal phy: */
1315 cfg = cfg & ~(CfgExtPhy | CfgPhyDis);
1316 writel(cfg, ioaddr + ChipConfig);
1317 readl(ioaddr + ChipConfig);
1320 /* 2) reset the internal phy: */
1321 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1322 writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2));
1323 readl(ioaddr + ChipConfig);
1325 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1326 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1327 if (!(bmcr & BMCR_RESET))
1331 if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
1333 "%s: phy reset did not complete in %d usec.\n",
1336 /* 3) reinit the phy fixup, it got lost during power down. */
1337 init_phy_fixup(dev);
1342 /* Scan for a PHY on the external mii bus.
1343 * There are two tricky points:
1344 * - Do not scan while the internal phy is enabled. The internal phy will
1345 * crash: e.g. reads from the DSPCFG register will return odd values and
1346 * the nasty random phy reset code will reset the nic every few seconds.
1347 * - The internal phy must be moved around, an external phy could
1348 * have the same address as the internal phy.
1350 static int find_mii(struct net_device *dev)
1352 struct netdev_private *np = netdev_priv(dev);
1357 /* Switch to external phy */
1358 did_switch = switch_port_external(dev);
1360 /* Scan the possible phy addresses:
1362 * PHY address 0 means that the phy is in isolate mode. Not yet
1363 * supported due to lack of test hardware. User space should
1364 * handle it through ethtool.
1366 for (i = 1; i <= 31; i++) {
1367 move_int_phy(dev, i);
1368 tmp = miiport_read(dev, i, MII_BMSR);
1369 if (tmp != 0xffff && tmp != 0x0000) {
1370 /* found something! */
1371 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1372 + mdio_read(dev, MII_PHYSID2);
1373 if (netif_msg_probe(np)) {
1374 printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n",
1375 pci_name(np->pci_dev), np->mii, i);
1380 /* And switch back to internal phy: */
1382 switch_port_internal(dev);
1386 /* CFG bits [13:16] [18:23] */
1387 #define CFG_RESET_SAVE 0xfde000
1388 /* WCSR bits [0:4] [9:10] */
1389 #define WCSR_RESET_SAVE 0x61f
1390 /* RFCR bits [20] [22] [27:31] */
1391 #define RFCR_RESET_SAVE 0xf8500000;
1393 static void natsemi_reset(struct net_device *dev)
1401 struct netdev_private *np = netdev_priv(dev);
1402 void __iomem *ioaddr = ns_ioaddr(dev);
1405 * Resetting the chip causes some registers to be lost.
1406 * Natsemi suggests NOT reloading the EEPROM while live, so instead
1407 * we save the state that would have been loaded from EEPROM
1408 * on a normal power-up (see the spec EEPROM map). This assumes
1409 * whoever calls this will follow up with init_registers() eventually.
1413 cfg = readl(ioaddr + ChipConfig) & CFG_RESET_SAVE;
1415 wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE;
1417 rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE;
1419 for (i = 0; i < 3; i++) {
1420 writel(i*2, ioaddr + RxFilterAddr);
1421 pmatch[i] = readw(ioaddr + RxFilterData);
1424 for (i = 0; i < 3; i++) {
1425 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1426 sopass[i] = readw(ioaddr + RxFilterData);
1429 /* now whack the chip */
1430 writel(ChipReset, ioaddr + ChipCmd);
1431 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1432 if (!(readl(ioaddr + ChipCmd) & ChipReset))
1436 if (i==NATSEMI_HW_TIMEOUT) {
1437 printk(KERN_WARNING "%s: reset did not complete in %d usec.\n",
1439 } else if (netif_msg_hw(np)) {
1440 printk(KERN_DEBUG "%s: reset completed in %d usec.\n",
1445 cfg |= readl(ioaddr + ChipConfig) & ~CFG_RESET_SAVE;
1446 /* turn on external phy if it was selected */
1447 if (dev->if_port == PORT_TP)
1448 cfg &= ~(CfgExtPhy | CfgPhyDis);
1450 cfg |= (CfgExtPhy | CfgPhyDis);
1451 writel(cfg, ioaddr + ChipConfig);
1453 wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE;
1454 writel(wcsr, ioaddr + WOLCmd);
1456 rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE;
1457 /* restore PMATCH */
1458 for (i = 0; i < 3; i++) {
1459 writel(i*2, ioaddr + RxFilterAddr);
1460 writew(pmatch[i], ioaddr + RxFilterData);
1462 for (i = 0; i < 3; i++) {
1463 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1464 writew(sopass[i], ioaddr + RxFilterData);
1467 writel(rfcr, ioaddr + RxFilterAddr);
1470 static void reset_rx(struct net_device *dev)
1473 struct netdev_private *np = netdev_priv(dev);
1474 void __iomem *ioaddr = ns_ioaddr(dev);
1476 np->intr_status &= ~RxResetDone;
1478 writel(RxReset, ioaddr + ChipCmd);
1480 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1481 np->intr_status |= readl(ioaddr + IntrStatus);
1482 if (np->intr_status & RxResetDone)
1486 if (i==NATSEMI_HW_TIMEOUT) {
1487 printk(KERN_WARNING "%s: RX reset did not complete in %d usec.\n",
1489 } else if (netif_msg_hw(np)) {
1490 printk(KERN_WARNING "%s: RX reset took %d usec.\n",
1495 static void natsemi_reload_eeprom(struct net_device *dev)
1497 struct netdev_private *np = netdev_priv(dev);
1498 void __iomem *ioaddr = ns_ioaddr(dev);
1501 writel(EepromReload, ioaddr + PCIBusCfg);
1502 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1504 if (!(readl(ioaddr + PCIBusCfg) & EepromReload))
1507 if (i==NATSEMI_HW_TIMEOUT) {
1508 printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n",
1509 pci_name(np->pci_dev), i*50);
1510 } else if (netif_msg_hw(np)) {
1511 printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n",
1512 pci_name(np->pci_dev), i*50);
1516 static void natsemi_stop_rxtx(struct net_device *dev)
1518 void __iomem * ioaddr = ns_ioaddr(dev);
1519 struct netdev_private *np = netdev_priv(dev);
1522 writel(RxOff | TxOff, ioaddr + ChipCmd);
1523 for(i=0;i< NATSEMI_HW_TIMEOUT;i++) {
1524 if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0)
1528 if (i==NATSEMI_HW_TIMEOUT) {
1529 printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n",
1531 } else if (netif_msg_hw(np)) {
1532 printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n",
1537 static int netdev_open(struct net_device *dev)
1539 struct netdev_private *np = netdev_priv(dev);
1540 void __iomem * ioaddr = ns_ioaddr(dev);
1543 /* Reset the chip, just in case. */
1546 i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev);
1549 if (netif_msg_ifup(np))
1550 printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
1551 dev->name, dev->irq);
1552 i = alloc_ring(dev);
1554 free_irq(dev->irq, dev);
1558 spin_lock_irq(&np->lock);
1559 init_registers(dev);
1560 /* now set the MAC address according to dev->dev_addr */
1561 for (i = 0; i < 3; i++) {
1562 u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i];
1564 writel(i*2, ioaddr + RxFilterAddr);
1565 writew(mac, ioaddr + RxFilterData);
1567 writel(np->cur_rx_mode, ioaddr + RxFilterAddr);
1568 spin_unlock_irq(&np->lock);
1570 netif_start_queue(dev);
1572 if (netif_msg_ifup(np))
1573 printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n",
1574 dev->name, (int)readl(ioaddr + ChipCmd));
1576 /* Set the timer to check for link beat. */
1577 init_timer(&np->timer);
1578 np->timer.expires = jiffies + NATSEMI_TIMER_FREQ;
1579 np->timer.data = (unsigned long)dev;
1580 np->timer.function = &netdev_timer; /* timer handler */
1581 add_timer(&np->timer);
1586 static void do_cable_magic(struct net_device *dev)
1588 struct netdev_private *np = netdev_priv(dev);
1589 void __iomem *ioaddr = ns_ioaddr(dev);
1591 if (dev->if_port != PORT_TP)
1594 if (np->srr >= SRR_DP83816_A5)
1598 * 100 MBit links with short cables can trip an issue with the chip.
1599 * The problem manifests as lots of CRC errors and/or flickering
1600 * activity LED while idle. This process is based on instructions
1601 * from engineers at National.
1603 if (readl(ioaddr + ChipConfig) & CfgSpeed100) {
1606 writew(1, ioaddr + PGSEL);
1608 * coefficient visibility should already be enabled via
1611 data = readw(ioaddr + TSTDAT) & 0xff;
1613 * the value must be negative, and within certain values
1614 * (these values all come from National)
1616 if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) {
1617 struct netdev_private *np = netdev_priv(dev);
1619 /* the bug has been triggered - fix the coefficient */
1620 writew(TSTDAT_FIXED, ioaddr + TSTDAT);
1621 /* lock the value */
1622 data = readw(ioaddr + DSPCFG);
1623 np->dspcfg = data | DSPCFG_LOCK;
1624 writew(np->dspcfg, ioaddr + DSPCFG);
1626 writew(0, ioaddr + PGSEL);
1630 static void undo_cable_magic(struct net_device *dev)
1633 struct netdev_private *np = netdev_priv(dev);
1634 void __iomem * ioaddr = ns_ioaddr(dev);
1636 if (dev->if_port != PORT_TP)
1639 if (np->srr >= SRR_DP83816_A5)
1642 writew(1, ioaddr + PGSEL);
1643 /* make sure the lock bit is clear */
1644 data = readw(ioaddr + DSPCFG);
1645 np->dspcfg = data & ~DSPCFG_LOCK;
1646 writew(np->dspcfg, ioaddr + DSPCFG);
1647 writew(0, ioaddr + PGSEL);
1650 static void check_link(struct net_device *dev)
1652 struct netdev_private *np = netdev_priv(dev);
1653 void __iomem * ioaddr = ns_ioaddr(dev);
1654 int duplex = np->duplex;
1657 /* If we are ignoring the PHY then don't try reading it. */
1659 goto propagate_state;
1661 /* The link status field is latched: it remains low after a temporary
1662 * link failure until it's read. We need the current link status,
1665 mdio_read(dev, MII_BMSR);
1666 bmsr = mdio_read(dev, MII_BMSR);
1668 if (!(bmsr & BMSR_LSTATUS)) {
1669 if (netif_carrier_ok(dev)) {
1670 if (netif_msg_link(np))
1671 printk(KERN_NOTICE "%s: link down.\n",
1673 netif_carrier_off(dev);
1674 undo_cable_magic(dev);
1678 if (!netif_carrier_ok(dev)) {
1679 if (netif_msg_link(np))
1680 printk(KERN_NOTICE "%s: link up.\n", dev->name);
1681 netif_carrier_on(dev);
1682 do_cable_magic(dev);
1685 duplex = np->full_duplex;
1687 if (bmsr & BMSR_ANEGCOMPLETE) {
1688 int tmp = mii_nway_result(
1689 np->advertising & mdio_read(dev, MII_LPA));
1690 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
1692 } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX)
1697 /* if duplex is set then bit 28 must be set, too */
1698 if (duplex ^ !!(np->rx_config & RxAcceptTx)) {
1699 if (netif_msg_link(np))
1701 "%s: Setting %s-duplex based on negotiated "
1702 "link capability.\n", dev->name,
1703 duplex ? "full" : "half");
1705 np->rx_config |= RxAcceptTx;
1706 np->tx_config |= TxCarrierIgn | TxHeartIgn;
1708 np->rx_config &= ~RxAcceptTx;
1709 np->tx_config &= ~(TxCarrierIgn | TxHeartIgn);
1711 writel(np->tx_config, ioaddr + TxConfig);
1712 writel(np->rx_config, ioaddr + RxConfig);
1716 static void init_registers(struct net_device *dev)
1718 struct netdev_private *np = netdev_priv(dev);
1719 void __iomem * ioaddr = ns_ioaddr(dev);
1721 init_phy_fixup(dev);
1723 /* clear any interrupts that are pending, such as wake events */
1724 readl(ioaddr + IntrStatus);
1726 writel(np->ring_dma, ioaddr + RxRingPtr);
1727 writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc),
1728 ioaddr + TxRingPtr);
1730 /* Initialize other registers.
1731 * Configure the PCI bus bursts and FIFO thresholds.
1732 * Configure for standard, in-spec Ethernet.
1733 * Start with half-duplex. check_link will update
1734 * to the correct settings.
1737 /* DRTH: 2: start tx if 64 bytes are in the fifo
1738 * FLTH: 0x10: refill with next packet if 512 bytes are free
1739 * MXDMA: 0: up to 256 byte bursts.
1740 * MXDMA must be <= FLTH
1744 np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 |
1745 TX_FLTH_VAL | TX_DRTH_VAL_START;
1746 writel(np->tx_config, ioaddr + TxConfig);
1748 /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo
1749 * MXDMA 0: up to 256 byte bursts
1751 np->rx_config = RxMxdma_256 | RX_DRTH_VAL;
1752 /* if receive ring now has bigger buffers than normal, enable jumbo */
1753 if (np->rx_buf_sz > NATSEMI_LONGPKT)
1754 np->rx_config |= RxAcceptLong;
1756 writel(np->rx_config, ioaddr + RxConfig);
1759 * The PME bit is initialized from the EEPROM contents.
1760 * PCI cards probably have PME disabled, but motherboard
1761 * implementations may have PME set to enable WakeOnLan.
1762 * With PME set the chip will scan incoming packets but
1763 * nothing will be written to memory. */
1764 np->SavedClkRun = readl(ioaddr + ClkRun);
1765 writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun);
1766 if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) {
1767 printk(KERN_NOTICE "%s: Wake-up event %#08x\n",
1768 dev->name, readl(ioaddr + WOLCmd));
1774 /* Enable interrupts by setting the interrupt mask. */
1775 writel(DEFAULT_INTR, ioaddr + IntrMask);
1776 natsemi_irq_enable(dev);
1778 writel(RxOn | TxOn, ioaddr + ChipCmd);
1779 writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
1785 * 1) check for link changes. Usually they are handled by the MII interrupt
1786 * but it doesn't hurt to check twice.
1787 * 2) check for sudden death of the NIC:
1788 * It seems that a reference set for this chip went out with incorrect info,
1789 * and there exist boards that aren't quite right. An unexpected voltage
1790 * drop can cause the PHY to get itself in a weird state (basically reset).
1791 * NOTE: this only seems to affect revC chips. The user can disable
1792 * this check via dspcfg_workaround sysfs option.
1793 * 3) check of death of the RX path due to OOM
1795 static void netdev_timer(unsigned long data)
1797 struct net_device *dev = (struct net_device *)data;
1798 struct netdev_private *np = netdev_priv(dev);
1799 void __iomem * ioaddr = ns_ioaddr(dev);
1800 int next_tick = 5*HZ;
1802 if (netif_msg_timer(np)) {
1803 /* DO NOT read the IntrStatus register,
1804 * a read clears any pending interrupts.
1806 printk(KERN_DEBUG "%s: Media selection timer tick.\n",
1810 if (dev->if_port == PORT_TP) {
1813 spin_lock_irq(&np->lock);
1814 /* check for a nasty random phy-reset - use dspcfg as a flag */
1815 writew(1, ioaddr+PGSEL);
1816 dspcfg = readw(ioaddr+DSPCFG);
1817 writew(0, ioaddr+PGSEL);
1818 if (np->dspcfg_workaround && dspcfg != np->dspcfg) {
1819 if (!netif_queue_stopped(dev)) {
1820 spin_unlock_irq(&np->lock);
1821 if (netif_msg_drv(np))
1822 printk(KERN_NOTICE "%s: possible phy reset: "
1823 "re-initializing\n", dev->name);
1824 disable_irq(dev->irq);
1825 spin_lock_irq(&np->lock);
1826 natsemi_stop_rxtx(dev);
1829 init_registers(dev);
1830 spin_unlock_irq(&np->lock);
1831 enable_irq(dev->irq);
1835 spin_unlock_irq(&np->lock);
1838 /* init_registers() calls check_link() for the above case */
1840 spin_unlock_irq(&np->lock);
1843 spin_lock_irq(&np->lock);
1845 spin_unlock_irq(&np->lock);
1848 disable_irq(dev->irq);
1851 enable_irq(dev->irq);
1853 writel(RxOn, ioaddr + ChipCmd);
1858 mod_timer(&np->timer, jiffies + next_tick);
1861 static void dump_ring(struct net_device *dev)
1863 struct netdev_private *np = netdev_priv(dev);
1865 if (netif_msg_pktdata(np)) {
1867 printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring);
1868 for (i = 0; i < TX_RING_SIZE; i++) {
1869 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1870 i, np->tx_ring[i].next_desc,
1871 np->tx_ring[i].cmd_status,
1872 np->tx_ring[i].addr);
1874 printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring);
1875 for (i = 0; i < RX_RING_SIZE; i++) {
1876 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1877 i, np->rx_ring[i].next_desc,
1878 np->rx_ring[i].cmd_status,
1879 np->rx_ring[i].addr);
1884 static void tx_timeout(struct net_device *dev)
1886 struct netdev_private *np = netdev_priv(dev);
1887 void __iomem * ioaddr = ns_ioaddr(dev);
1889 disable_irq(dev->irq);
1890 spin_lock_irq(&np->lock);
1891 if (!np->hands_off) {
1892 if (netif_msg_tx_err(np))
1894 "%s: Transmit timed out, status %#08x,"
1896 dev->name, readl(ioaddr + IntrStatus));
1901 init_registers(dev);
1904 "%s: tx_timeout while in hands_off state?\n",
1907 spin_unlock_irq(&np->lock);
1908 enable_irq(dev->irq);
1910 dev->trans_start = jiffies;
1911 np->stats.tx_errors++;
1912 netif_wake_queue(dev);
1915 static int alloc_ring(struct net_device *dev)
1917 struct netdev_private *np = netdev_priv(dev);
1918 np->rx_ring = pci_alloc_consistent(np->pci_dev,
1919 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
1923 np->tx_ring = &np->rx_ring[RX_RING_SIZE];
1927 static void refill_rx(struct net_device *dev)
1929 struct netdev_private *np = netdev_priv(dev);
1931 /* Refill the Rx ring buffers. */
1932 for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1933 struct sk_buff *skb;
1934 int entry = np->dirty_rx % RX_RING_SIZE;
1935 if (np->rx_skbuff[entry] == NULL) {
1936 unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING;
1937 skb = dev_alloc_skb(buflen);
1938 np->rx_skbuff[entry] = skb;
1940 break; /* Better luck next round. */
1941 skb->dev = dev; /* Mark as being used by this device. */
1942 np->rx_dma[entry] = pci_map_single(np->pci_dev,
1943 skb->data, buflen, PCI_DMA_FROMDEVICE);
1944 np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
1946 np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz);
1948 if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) {
1949 if (netif_msg_rx_err(np))
1950 printk(KERN_WARNING "%s: going OOM.\n", dev->name);
1955 static void set_bufsize(struct net_device *dev)
1957 struct netdev_private *np = netdev_priv(dev);
1958 if (dev->mtu <= ETH_DATA_LEN)
1959 np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS;
1961 np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS;
1964 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1965 static void init_ring(struct net_device *dev)
1967 struct netdev_private *np = netdev_priv(dev);
1971 np->dirty_tx = np->cur_tx = 0;
1972 for (i = 0; i < TX_RING_SIZE; i++) {
1973 np->tx_skbuff[i] = NULL;
1974 np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1975 +sizeof(struct netdev_desc)
1976 *((i+1)%TX_RING_SIZE+RX_RING_SIZE));
1977 np->tx_ring[i].cmd_status = 0;
1982 np->cur_rx = RX_RING_SIZE;
1986 np->rx_head_desc = &np->rx_ring[0];
1988 /* Please be carefull before changing this loop - at least gcc-2.95.1
1989 * miscompiles it otherwise.
1991 /* Initialize all Rx descriptors. */
1992 for (i = 0; i < RX_RING_SIZE; i++) {
1993 np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1994 +sizeof(struct netdev_desc)
1995 *((i+1)%RX_RING_SIZE));
1996 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
1997 np->rx_skbuff[i] = NULL;
2003 static void drain_tx(struct net_device *dev)
2005 struct netdev_private *np = netdev_priv(dev);
2008 for (i = 0; i < TX_RING_SIZE; i++) {
2009 if (np->tx_skbuff[i]) {
2010 pci_unmap_single(np->pci_dev,
2011 np->tx_dma[i], np->tx_skbuff[i]->len,
2013 dev_kfree_skb(np->tx_skbuff[i]);
2014 np->stats.tx_dropped++;
2016 np->tx_skbuff[i] = NULL;
2020 static void drain_rx(struct net_device *dev)
2022 struct netdev_private *np = netdev_priv(dev);
2023 unsigned int buflen = np->rx_buf_sz;
2026 /* Free all the skbuffs in the Rx queue. */
2027 for (i = 0; i < RX_RING_SIZE; i++) {
2028 np->rx_ring[i].cmd_status = 0;
2029 np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
2030 if (np->rx_skbuff[i]) {
2031 pci_unmap_single(np->pci_dev,
2032 np->rx_dma[i], buflen,
2033 PCI_DMA_FROMDEVICE);
2034 dev_kfree_skb(np->rx_skbuff[i]);
2036 np->rx_skbuff[i] = NULL;
2040 static void drain_ring(struct net_device *dev)
2046 static void free_ring(struct net_device *dev)
2048 struct netdev_private *np = netdev_priv(dev);
2049 pci_free_consistent(np->pci_dev,
2050 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
2051 np->rx_ring, np->ring_dma);
2054 static void reinit_rx(struct net_device *dev)
2056 struct netdev_private *np = netdev_priv(dev);
2061 np->cur_rx = RX_RING_SIZE;
2062 np->rx_head_desc = &np->rx_ring[0];
2063 /* Initialize all Rx descriptors. */
2064 for (i = 0; i < RX_RING_SIZE; i++)
2065 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
2070 static void reinit_ring(struct net_device *dev)
2072 struct netdev_private *np = netdev_priv(dev);
2077 np->dirty_tx = np->cur_tx = 0;
2078 for (i=0;i<TX_RING_SIZE;i++)
2079 np->tx_ring[i].cmd_status = 0;
2084 static int start_tx(struct sk_buff *skb, struct net_device *dev)
2086 struct netdev_private *np = netdev_priv(dev);
2087 void __iomem * ioaddr = ns_ioaddr(dev);
2089 unsigned long flags;
2091 /* Note: Ordering is important here, set the field with the
2092 "ownership" bit last, and only then increment cur_tx. */
2094 /* Calculate the next Tx descriptor entry. */
2095 entry = np->cur_tx % TX_RING_SIZE;
2097 np->tx_skbuff[entry] = skb;
2098 np->tx_dma[entry] = pci_map_single(np->pci_dev,
2099 skb->data,skb->len, PCI_DMA_TODEVICE);
2101 np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]);
2103 spin_lock_irqsave(&np->lock, flags);
2105 if (!np->hands_off) {
2106 np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len);
2107 /* StrongARM: Explicitly cache flush np->tx_ring and
2108 * skb->data,skb->len. */
2111 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
2112 netdev_tx_done(dev);
2113 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1)
2114 netif_stop_queue(dev);
2116 /* Wake the potentially-idle transmit channel. */
2117 writel(TxOn, ioaddr + ChipCmd);
2119 dev_kfree_skb_irq(skb);
2120 np->stats.tx_dropped++;
2122 spin_unlock_irqrestore(&np->lock, flags);
2124 dev->trans_start = jiffies;
2126 if (netif_msg_tx_queued(np)) {
2127 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
2128 dev->name, np->cur_tx, entry);
2133 static void netdev_tx_done(struct net_device *dev)
2135 struct netdev_private *np = netdev_priv(dev);
2137 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
2138 int entry = np->dirty_tx % TX_RING_SIZE;
2139 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn))
2141 if (netif_msg_tx_done(np))
2143 "%s: tx frame #%d finished, status %#08x.\n",
2144 dev->name, np->dirty_tx,
2145 le32_to_cpu(np->tx_ring[entry].cmd_status));
2146 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) {
2147 np->stats.tx_packets++;
2148 np->stats.tx_bytes += np->tx_skbuff[entry]->len;
2149 } else { /* Various Tx errors */
2151 le32_to_cpu(np->tx_ring[entry].cmd_status);
2152 if (tx_status & (DescTxAbort|DescTxExcColl))
2153 np->stats.tx_aborted_errors++;
2154 if (tx_status & DescTxFIFO)
2155 np->stats.tx_fifo_errors++;
2156 if (tx_status & DescTxCarrier)
2157 np->stats.tx_carrier_errors++;
2158 if (tx_status & DescTxOOWCol)
2159 np->stats.tx_window_errors++;
2160 np->stats.tx_errors++;
2162 pci_unmap_single(np->pci_dev,np->tx_dma[entry],
2163 np->tx_skbuff[entry]->len,
2165 /* Free the original skb. */
2166 dev_kfree_skb_irq(np->tx_skbuff[entry]);
2167 np->tx_skbuff[entry] = NULL;
2169 if (netif_queue_stopped(dev)
2170 && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
2171 /* The ring is no longer full, wake queue. */
2172 netif_wake_queue(dev);
2176 /* The interrupt handler doesn't actually handle interrupts itself, it
2177 * schedules a NAPI poll if there is anything to do. */
2178 static irqreturn_t intr_handler(int irq, void *dev_instance)
2180 struct net_device *dev = dev_instance;
2181 struct netdev_private *np = netdev_priv(dev);
2182 void __iomem * ioaddr = ns_ioaddr(dev);
2184 /* Reading IntrStatus automatically acknowledges so don't do
2185 * that while interrupts are disabled, (for example, while a
2186 * poll is scheduled). */
2187 if (np->hands_off || !readl(ioaddr + IntrEnable))
2190 np->intr_status = readl(ioaddr + IntrStatus);
2192 if (!np->intr_status)
2195 if (netif_msg_intr(np))
2197 "%s: Interrupt, status %#08x, mask %#08x.\n",
2198 dev->name, np->intr_status,
2199 readl(ioaddr + IntrMask));
2201 prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]);
2203 if (netif_rx_schedule_prep(dev)) {
2204 /* Disable interrupts and register for poll */
2205 natsemi_irq_disable(dev);
2206 __netif_rx_schedule(dev);
2209 "%s: Ignoring interrupt, status %#08x, mask %#08x.\n",
2210 dev->name, np->intr_status,
2211 readl(ioaddr + IntrMask));
2216 /* This is the NAPI poll routine. As well as the standard RX handling
2217 * it also handles all other interrupts that the chip might raise.
2219 static int natsemi_poll(struct net_device *dev, int *budget)
2221 struct netdev_private *np = netdev_priv(dev);
2222 void __iomem * ioaddr = ns_ioaddr(dev);
2224 int work_to_do = min(*budget, dev->quota);
2228 if (netif_msg_intr(np))
2230 "%s: Poll, status %#08x, mask %#08x.\n",
2231 dev->name, np->intr_status,
2232 readl(ioaddr + IntrMask));
2234 /* netdev_rx() may read IntrStatus again if the RX state
2235 * machine falls over so do it first. */
2236 if (np->intr_status &
2237 (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
2238 IntrRxErr | IntrRxOverrun)) {
2239 netdev_rx(dev, &work_done, work_to_do);
2242 if (np->intr_status &
2243 (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) {
2244 spin_lock(&np->lock);
2245 netdev_tx_done(dev);
2246 spin_unlock(&np->lock);
2249 /* Abnormal error summary/uncommon events handlers. */
2250 if (np->intr_status & IntrAbnormalSummary)
2251 netdev_error(dev, np->intr_status);
2253 *budget -= work_done;
2254 dev->quota -= work_done;
2256 if (work_done >= work_to_do)
2259 np->intr_status = readl(ioaddr + IntrStatus);
2260 } while (np->intr_status);
2262 netif_rx_complete(dev);
2264 /* Reenable interrupts providing nothing is trying to shut
2266 spin_lock(&np->lock);
2267 if (!np->hands_off && netif_running(dev))
2268 natsemi_irq_enable(dev);
2269 spin_unlock(&np->lock);
2274 /* This routine is logically part of the interrupt handler, but separated
2275 for clarity and better register allocation. */
2276 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do)
2278 struct netdev_private *np = netdev_priv(dev);
2279 int entry = np->cur_rx % RX_RING_SIZE;
2280 int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
2281 s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2282 unsigned int buflen = np->rx_buf_sz;
2283 void __iomem * ioaddr = ns_ioaddr(dev);
2285 /* If the driver owns the next entry it's a new packet. Send it up. */
2286 while (desc_status < 0) { /* e.g. & DescOwn */
2288 if (netif_msg_rx_status(np))
2290 " netdev_rx() entry %d status was %#08x.\n",
2291 entry, desc_status);
2295 if (*work_done >= work_to_do)
2300 pkt_len = (desc_status & DescSizeMask) - 4;
2301 if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){
2302 if (desc_status & DescMore) {
2303 unsigned long flags;
2305 if (netif_msg_rx_err(np))
2307 "%s: Oversized(?) Ethernet "
2308 "frame spanned multiple "
2309 "buffers, entry %#08x "
2310 "status %#08x.\n", dev->name,
2311 np->cur_rx, desc_status);
2312 np->stats.rx_length_errors++;
2314 /* The RX state machine has probably
2315 * locked up beneath us. Follow the
2316 * reset procedure documented in
2319 spin_lock_irqsave(&np->lock, flags);
2322 writel(np->ring_dma, ioaddr + RxRingPtr);
2324 spin_unlock_irqrestore(&np->lock, flags);
2326 /* We'll enable RX on exit from this
2331 /* There was an error. */
2332 np->stats.rx_errors++;
2333 if (desc_status & (DescRxAbort|DescRxOver))
2334 np->stats.rx_over_errors++;
2335 if (desc_status & (DescRxLong|DescRxRunt))
2336 np->stats.rx_length_errors++;
2337 if (desc_status & (DescRxInvalid|DescRxAlign))
2338 np->stats.rx_frame_errors++;
2339 if (desc_status & DescRxCRC)
2340 np->stats.rx_crc_errors++;
2342 } else if (pkt_len > np->rx_buf_sz) {
2343 /* if this is the tail of a double buffer
2344 * packet, we've already counted the error
2345 * on the first part. Ignore the second half.
2348 struct sk_buff *skb;
2349 /* Omit CRC size. */
2350 /* Check if the packet is long enough to accept
2351 * without copying to a minimally-sized skbuff. */
2352 if (pkt_len < rx_copybreak
2353 && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) {
2354 /* 16 byte align the IP header */
2355 skb_reserve(skb, RX_OFFSET);
2356 pci_dma_sync_single_for_cpu(np->pci_dev,
2359 PCI_DMA_FROMDEVICE);
2360 eth_copy_and_sum(skb,
2361 np->rx_skbuff[entry]->data, pkt_len, 0);
2362 skb_put(skb, pkt_len);
2363 pci_dma_sync_single_for_device(np->pci_dev,
2366 PCI_DMA_FROMDEVICE);
2368 pci_unmap_single(np->pci_dev, np->rx_dma[entry],
2369 buflen, PCI_DMA_FROMDEVICE);
2370 skb_put(skb = np->rx_skbuff[entry], pkt_len);
2371 np->rx_skbuff[entry] = NULL;
2373 skb->protocol = eth_type_trans(skb, dev);
2374 netif_receive_skb(skb);
2375 dev->last_rx = jiffies;
2376 np->stats.rx_packets++;
2377 np->stats.rx_bytes += pkt_len;
2379 entry = (++np->cur_rx) % RX_RING_SIZE;
2380 np->rx_head_desc = &np->rx_ring[entry];
2381 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2385 /* Restart Rx engine if stopped. */
2387 mod_timer(&np->timer, jiffies + 1);
2389 writel(RxOn, ioaddr + ChipCmd);
2392 static void netdev_error(struct net_device *dev, int intr_status)
2394 struct netdev_private *np = netdev_priv(dev);
2395 void __iomem * ioaddr = ns_ioaddr(dev);
2397 spin_lock(&np->lock);
2398 if (intr_status & LinkChange) {
2399 u16 lpa = mdio_read(dev, MII_LPA);
2400 if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE
2401 && netif_msg_link(np)) {
2403 "%s: Autonegotiation advertising"
2404 " %#04x partner %#04x.\n", dev->name,
2405 np->advertising, lpa);
2408 /* read MII int status to clear the flag */
2409 readw(ioaddr + MIntrStatus);
2412 if (intr_status & StatsMax) {
2415 if (intr_status & IntrTxUnderrun) {
2416 if ((np->tx_config & TxDrthMask) < TX_DRTH_VAL_LIMIT) {
2417 np->tx_config += TX_DRTH_VAL_INC;
2418 if (netif_msg_tx_err(np))
2420 "%s: increased tx threshold, txcfg %#08x.\n",
2421 dev->name, np->tx_config);
2423 if (netif_msg_tx_err(np))
2425 "%s: tx underrun with maximum tx threshold, txcfg %#08x.\n",
2426 dev->name, np->tx_config);
2428 writel(np->tx_config, ioaddr + TxConfig);
2430 if (intr_status & WOLPkt && netif_msg_wol(np)) {
2431 int wol_status = readl(ioaddr + WOLCmd);
2432 printk(KERN_NOTICE "%s: Link wake-up event %#08x\n",
2433 dev->name, wol_status);
2435 if (intr_status & RxStatusFIFOOver) {
2436 if (netif_msg_rx_err(np) && netif_msg_intr(np)) {
2437 printk(KERN_NOTICE "%s: Rx status FIFO overrun\n",
2440 np->stats.rx_fifo_errors++;
2442 /* Hmmmmm, it's not clear how to recover from PCI faults. */
2443 if (intr_status & IntrPCIErr) {
2444 printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name,
2445 intr_status & IntrPCIErr);
2446 np->stats.tx_fifo_errors++;
2447 np->stats.rx_fifo_errors++;
2449 spin_unlock(&np->lock);
2452 static void __get_stats(struct net_device *dev)
2454 void __iomem * ioaddr = ns_ioaddr(dev);
2455 struct netdev_private *np = netdev_priv(dev);
2457 /* The chip only need report frame silently dropped. */
2458 np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
2459 np->stats.rx_missed_errors += readl(ioaddr + RxMissed);
2462 static struct net_device_stats *get_stats(struct net_device *dev)
2464 struct netdev_private *np = netdev_priv(dev);
2466 /* The chip only need report frame silently dropped. */
2467 spin_lock_irq(&np->lock);
2468 if (netif_running(dev) && !np->hands_off)
2470 spin_unlock_irq(&np->lock);
2475 #ifdef CONFIG_NET_POLL_CONTROLLER
2476 static void natsemi_poll_controller(struct net_device *dev)
2478 disable_irq(dev->irq);
2479 intr_handler(dev->irq, dev);
2480 enable_irq(dev->irq);
2484 #define HASH_TABLE 0x200
2485 static void __set_rx_mode(struct net_device *dev)
2487 void __iomem * ioaddr = ns_ioaddr(dev);
2488 struct netdev_private *np = netdev_priv(dev);
2489 u8 mc_filter[64]; /* Multicast hash filter */
2492 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
2493 rx_mode = RxFilterEnable | AcceptBroadcast
2494 | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys;
2495 } else if ((dev->mc_count > multicast_filter_limit)
2496 || (dev->flags & IFF_ALLMULTI)) {
2497 rx_mode = RxFilterEnable | AcceptBroadcast
2498 | AcceptAllMulticast | AcceptMyPhys;
2500 struct dev_mc_list *mclist;
2502 memset(mc_filter, 0, sizeof(mc_filter));
2503 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
2504 i++, mclist = mclist->next) {
2505 int i = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff;
2506 mc_filter[i/8] |= (1 << (i & 0x07));
2508 rx_mode = RxFilterEnable | AcceptBroadcast
2509 | AcceptMulticast | AcceptMyPhys;
2510 for (i = 0; i < 64; i += 2) {
2511 writel(HASH_TABLE + i, ioaddr + RxFilterAddr);
2512 writel((mc_filter[i + 1] << 8) + mc_filter[i],
2513 ioaddr + RxFilterData);
2516 writel(rx_mode, ioaddr + RxFilterAddr);
2517 np->cur_rx_mode = rx_mode;
2520 static int natsemi_change_mtu(struct net_device *dev, int new_mtu)
2522 if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS)
2527 /* synchronized against open : rtnl_lock() held by caller */
2528 if (netif_running(dev)) {
2529 struct netdev_private *np = netdev_priv(dev);
2530 void __iomem * ioaddr = ns_ioaddr(dev);
2532 disable_irq(dev->irq);
2533 spin_lock(&np->lock);
2535 natsemi_stop_rxtx(dev);
2536 /* drain rx queue */
2538 /* change buffers */
2541 writel(np->ring_dma, ioaddr + RxRingPtr);
2542 /* restart engines */
2543 writel(RxOn | TxOn, ioaddr + ChipCmd);
2544 spin_unlock(&np->lock);
2545 enable_irq(dev->irq);
2550 static void set_rx_mode(struct net_device *dev)
2552 struct netdev_private *np = netdev_priv(dev);
2553 spin_lock_irq(&np->lock);
2556 spin_unlock_irq(&np->lock);
2559 static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2561 struct netdev_private *np = netdev_priv(dev);
2562 strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
2563 strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
2564 strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN);
2567 static int get_regs_len(struct net_device *dev)
2569 return NATSEMI_REGS_SIZE;
2572 static int get_eeprom_len(struct net_device *dev)
2574 struct netdev_private *np = netdev_priv(dev);
2575 return np->eeprom_size;
2578 static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2580 struct netdev_private *np = netdev_priv(dev);
2581 spin_lock_irq(&np->lock);
2582 netdev_get_ecmd(dev, ecmd);
2583 spin_unlock_irq(&np->lock);
2587 static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2589 struct netdev_private *np = netdev_priv(dev);
2591 spin_lock_irq(&np->lock);
2592 res = netdev_set_ecmd(dev, ecmd);
2593 spin_unlock_irq(&np->lock);
2597 static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2599 struct netdev_private *np = netdev_priv(dev);
2600 spin_lock_irq(&np->lock);
2601 netdev_get_wol(dev, &wol->supported, &wol->wolopts);
2602 netdev_get_sopass(dev, wol->sopass);
2603 spin_unlock_irq(&np->lock);
2606 static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2608 struct netdev_private *np = netdev_priv(dev);
2610 spin_lock_irq(&np->lock);
2611 netdev_set_wol(dev, wol->wolopts);
2612 res = netdev_set_sopass(dev, wol->sopass);
2613 spin_unlock_irq(&np->lock);
2617 static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
2619 struct netdev_private *np = netdev_priv(dev);
2620 regs->version = NATSEMI_REGS_VER;
2621 spin_lock_irq(&np->lock);
2622 netdev_get_regs(dev, buf);
2623 spin_unlock_irq(&np->lock);
2626 static u32 get_msglevel(struct net_device *dev)
2628 struct netdev_private *np = netdev_priv(dev);
2629 return np->msg_enable;
2632 static void set_msglevel(struct net_device *dev, u32 val)
2634 struct netdev_private *np = netdev_priv(dev);
2635 np->msg_enable = val;
2638 static int nway_reset(struct net_device *dev)
2642 /* if autoneg is off, it's an error */
2643 tmp = mdio_read(dev, MII_BMCR);
2644 if (tmp & BMCR_ANENABLE) {
2645 tmp |= (BMCR_ANRESTART);
2646 mdio_write(dev, MII_BMCR, tmp);
2652 static u32 get_link(struct net_device *dev)
2654 /* LSTATUS is latched low until a read - so read twice */
2655 mdio_read(dev, MII_BMSR);
2656 return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
2659 static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
2661 struct netdev_private *np = netdev_priv(dev);
2665 eebuf = kmalloc(np->eeprom_size, GFP_KERNEL);
2669 eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
2670 spin_lock_irq(&np->lock);
2671 res = netdev_get_eeprom(dev, eebuf);
2672 spin_unlock_irq(&np->lock);
2674 memcpy(data, eebuf+eeprom->offset, eeprom->len);
2679 static const struct ethtool_ops ethtool_ops = {
2680 .get_drvinfo = get_drvinfo,
2681 .get_regs_len = get_regs_len,
2682 .get_eeprom_len = get_eeprom_len,
2683 .get_settings = get_settings,
2684 .set_settings = set_settings,
2687 .get_regs = get_regs,
2688 .get_msglevel = get_msglevel,
2689 .set_msglevel = set_msglevel,
2690 .nway_reset = nway_reset,
2691 .get_link = get_link,
2692 .get_eeprom = get_eeprom,
2695 static int netdev_set_wol(struct net_device *dev, u32 newval)
2697 struct netdev_private *np = netdev_priv(dev);
2698 void __iomem * ioaddr = ns_ioaddr(dev);
2699 u32 data = readl(ioaddr + WOLCmd) & ~WakeOptsSummary;
2701 /* translate to bitmasks this chip understands */
2702 if (newval & WAKE_PHY)
2704 if (newval & WAKE_UCAST)
2705 data |= WakeUnicast;
2706 if (newval & WAKE_MCAST)
2707 data |= WakeMulticast;
2708 if (newval & WAKE_BCAST)
2709 data |= WakeBroadcast;
2710 if (newval & WAKE_ARP)
2712 if (newval & WAKE_MAGIC)
2714 if (np->srr >= SRR_DP83815_D) {
2715 if (newval & WAKE_MAGICSECURE) {
2716 data |= WakeMagicSecure;
2720 writel(data, ioaddr + WOLCmd);
2725 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
2727 struct netdev_private *np = netdev_priv(dev);
2728 void __iomem * ioaddr = ns_ioaddr(dev);
2729 u32 regval = readl(ioaddr + WOLCmd);
2731 *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
2732 | WAKE_ARP | WAKE_MAGIC);
2734 if (np->srr >= SRR_DP83815_D) {
2735 /* SOPASS works on revD and higher */
2736 *supported |= WAKE_MAGICSECURE;
2740 /* translate from chip bitmasks */
2741 if (regval & WakePhy)
2743 if (regval & WakeUnicast)
2745 if (regval & WakeMulticast)
2747 if (regval & WakeBroadcast)
2749 if (regval & WakeArp)
2751 if (regval & WakeMagic)
2753 if (regval & WakeMagicSecure) {
2754 /* this can be on in revC, but it's broken */
2755 *cur |= WAKE_MAGICSECURE;
2761 static int netdev_set_sopass(struct net_device *dev, u8 *newval)
2763 struct netdev_private *np = netdev_priv(dev);
2764 void __iomem * ioaddr = ns_ioaddr(dev);
2765 u16 *sval = (u16 *)newval;
2768 if (np->srr < SRR_DP83815_D) {
2772 /* enable writing to these registers by disabling the RX filter */
2773 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2774 addr &= ~RxFilterEnable;
2775 writel(addr, ioaddr + RxFilterAddr);
2777 /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
2778 writel(addr | 0xa, ioaddr + RxFilterAddr);
2779 writew(sval[0], ioaddr + RxFilterData);
2781 writel(addr | 0xc, ioaddr + RxFilterAddr);
2782 writew(sval[1], ioaddr + RxFilterData);
2784 writel(addr | 0xe, ioaddr + RxFilterAddr);
2785 writew(sval[2], ioaddr + RxFilterData);
2787 /* re-enable the RX filter */
2788 writel(addr | RxFilterEnable, ioaddr + RxFilterAddr);
2793 static int netdev_get_sopass(struct net_device *dev, u8 *data)
2795 struct netdev_private *np = netdev_priv(dev);
2796 void __iomem * ioaddr = ns_ioaddr(dev);
2797 u16 *sval = (u16 *)data;
2800 if (np->srr < SRR_DP83815_D) {
2801 sval[0] = sval[1] = sval[2] = 0;
2805 /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
2806 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2808 writel(addr | 0xa, ioaddr + RxFilterAddr);
2809 sval[0] = readw(ioaddr + RxFilterData);
2811 writel(addr | 0xc, ioaddr + RxFilterAddr);
2812 sval[1] = readw(ioaddr + RxFilterData);
2814 writel(addr | 0xe, ioaddr + RxFilterAddr);
2815 sval[2] = readw(ioaddr + RxFilterData);
2817 writel(addr, ioaddr + RxFilterAddr);
2822 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2824 struct netdev_private *np = netdev_priv(dev);
2827 ecmd->port = dev->if_port;
2828 ecmd->speed = np->speed;
2829 ecmd->duplex = np->duplex;
2830 ecmd->autoneg = np->autoneg;
2831 ecmd->advertising = 0;
2832 if (np->advertising & ADVERTISE_10HALF)
2833 ecmd->advertising |= ADVERTISED_10baseT_Half;
2834 if (np->advertising & ADVERTISE_10FULL)
2835 ecmd->advertising |= ADVERTISED_10baseT_Full;
2836 if (np->advertising & ADVERTISE_100HALF)
2837 ecmd->advertising |= ADVERTISED_100baseT_Half;
2838 if (np->advertising & ADVERTISE_100FULL)
2839 ecmd->advertising |= ADVERTISED_100baseT_Full;
2840 ecmd->supported = (SUPPORTED_Autoneg |
2841 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2842 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2843 SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE);
2844 ecmd->phy_address = np->phy_addr_external;
2846 * We intentionally report the phy address of the external
2847 * phy, even if the internal phy is used. This is necessary
2848 * to work around a deficiency of the ethtool interface:
2849 * It's only possible to query the settings of the active
2851 * # ethtool -s ethX port mii
2852 * actually sends an ioctl to switch to port mii with the
2853 * settings that are used for the current active port.
2854 * If we would report a different phy address in this
2856 * # ethtool -s ethX port tp;ethtool -s ethX port mii
2857 * would unintentionally change the phy address.
2859 * Fortunately the phy address doesn't matter with the
2863 /* set information based on active port type */
2864 switch (ecmd->port) {
2867 ecmd->advertising |= ADVERTISED_TP;
2868 ecmd->transceiver = XCVR_INTERNAL;
2871 ecmd->advertising |= ADVERTISED_MII;
2872 ecmd->transceiver = XCVR_EXTERNAL;
2875 ecmd->advertising |= ADVERTISED_FIBRE;
2876 ecmd->transceiver = XCVR_EXTERNAL;
2880 /* if autonegotiation is on, try to return the active speed/duplex */
2881 if (ecmd->autoneg == AUTONEG_ENABLE) {
2882 ecmd->advertising |= ADVERTISED_Autoneg;
2883 tmp = mii_nway_result(
2884 np->advertising & mdio_read(dev, MII_LPA));
2885 if (tmp == LPA_100FULL || tmp == LPA_100HALF)
2886 ecmd->speed = SPEED_100;
2888 ecmd->speed = SPEED_10;
2889 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
2890 ecmd->duplex = DUPLEX_FULL;
2892 ecmd->duplex = DUPLEX_HALF;
2895 /* ignore maxtxpkt, maxrxpkt for now */
2900 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2902 struct netdev_private *np = netdev_priv(dev);
2904 if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE)
2906 if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL)
2908 if (ecmd->autoneg == AUTONEG_ENABLE) {
2909 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
2910 ADVERTISED_10baseT_Full |
2911 ADVERTISED_100baseT_Half |
2912 ADVERTISED_100baseT_Full)) == 0) {
2915 } else if (ecmd->autoneg == AUTONEG_DISABLE) {
2916 if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
2918 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
2925 * If we're ignoring the PHY then autoneg and the internal
2926 * transciever are really not going to work so don't let the
2929 if (np->ignore_phy && (ecmd->autoneg == AUTONEG_ENABLE ||
2930 ecmd->port == PORT_TP))
2934 * maxtxpkt, maxrxpkt: ignored for now.
2937 * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always
2938 * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and
2939 * selects based on ecmd->port.
2941 * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre
2942 * phys that are connected to the mii bus. It's used to apply fibre
2946 /* WHEW! now lets bang some bits */
2948 /* save the parms */
2949 dev->if_port = ecmd->port;
2950 np->autoneg = ecmd->autoneg;
2951 np->phy_addr_external = ecmd->phy_address & PhyAddrMask;
2952 if (np->autoneg == AUTONEG_ENABLE) {
2953 /* advertise only what has been requested */
2954 np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
2955 if (ecmd->advertising & ADVERTISED_10baseT_Half)
2956 np->advertising |= ADVERTISE_10HALF;
2957 if (ecmd->advertising & ADVERTISED_10baseT_Full)
2958 np->advertising |= ADVERTISE_10FULL;
2959 if (ecmd->advertising & ADVERTISED_100baseT_Half)
2960 np->advertising |= ADVERTISE_100HALF;
2961 if (ecmd->advertising & ADVERTISED_100baseT_Full)
2962 np->advertising |= ADVERTISE_100FULL;
2964 np->speed = ecmd->speed;
2965 np->duplex = ecmd->duplex;
2966 /* user overriding the initial full duplex parm? */
2967 if (np->duplex == DUPLEX_HALF)
2968 np->full_duplex = 0;
2971 /* get the right phy enabled */
2972 if (ecmd->port == PORT_TP)
2973 switch_port_internal(dev);
2975 switch_port_external(dev);
2977 /* set parms and see how this affected our link status */
2978 init_phy_fixup(dev);
2983 static int netdev_get_regs(struct net_device *dev, u8 *buf)
2988 u32 *rbuf = (u32 *)buf;
2989 void __iomem * ioaddr = ns_ioaddr(dev);
2991 /* read non-mii page 0 of registers */
2992 for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) {
2993 rbuf[i] = readl(ioaddr + i*4);
2996 /* read current mii registers */
2997 for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++)
2998 rbuf[i] = mdio_read(dev, i & 0x1f);
3000 /* read only the 'magic' registers from page 1 */
3001 writew(1, ioaddr + PGSEL);
3002 rbuf[i++] = readw(ioaddr + PMDCSR);
3003 rbuf[i++] = readw(ioaddr + TSTDAT);
3004 rbuf[i++] = readw(ioaddr + DSPCFG);
3005 rbuf[i++] = readw(ioaddr + SDCFG);
3006 writew(0, ioaddr + PGSEL);
3008 /* read RFCR indexed registers */
3009 rfcr = readl(ioaddr + RxFilterAddr);
3010 for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
3011 writel(j*2, ioaddr + RxFilterAddr);
3012 rbuf[i++] = readw(ioaddr + RxFilterData);
3014 writel(rfcr, ioaddr + RxFilterAddr);
3016 /* the interrupt status is clear-on-read - see if we missed any */
3017 if (rbuf[4] & rbuf[5]) {
3019 "%s: shoot, we dropped an interrupt (%#08x)\n",
3020 dev->name, rbuf[4] & rbuf[5]);
3026 #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \
3027 | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \
3028 | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \
3029 | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \
3030 | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \
3031 | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \
3032 | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \
3033 | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) )
3035 static int netdev_get_eeprom(struct net_device *dev, u8 *buf)
3038 u16 *ebuf = (u16 *)buf;
3039 void __iomem * ioaddr = ns_ioaddr(dev);
3040 struct netdev_private *np = netdev_priv(dev);
3042 /* eeprom_read reads 16 bits, and indexes by 16 bits */
3043 for (i = 0; i < np->eeprom_size/2; i++) {
3044 ebuf[i] = eeprom_read(ioaddr, i);
3045 /* The EEPROM itself stores data bit-swapped, but eeprom_read
3046 * reads it back "sanely". So we swap it back here in order to
3047 * present it to userland as it is stored. */
3048 ebuf[i] = SWAP_BITS(ebuf[i]);
3053 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3055 struct mii_ioctl_data *data = if_mii(rq);
3056 struct netdev_private *np = netdev_priv(dev);
3059 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
3060 case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
3061 data->phy_id = np->phy_addr_external;
3064 case SIOCGMIIREG: /* Read MII PHY register. */
3065 case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
3066 /* The phy_id is not enough to uniquely identify
3067 * the intended target. Therefore the command is sent to
3068 * the given mii on the current port.
3070 if (dev->if_port == PORT_TP) {
3071 if ((data->phy_id & 0x1f) == np->phy_addr_external)
3072 data->val_out = mdio_read(dev,
3073 data->reg_num & 0x1f);
3077 move_int_phy(dev, data->phy_id & 0x1f);
3078 data->val_out = miiport_read(dev, data->phy_id & 0x1f,
3079 data->reg_num & 0x1f);
3083 case SIOCSMIIREG: /* Write MII PHY register. */
3084 case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
3085 if (!capable(CAP_NET_ADMIN))
3087 if (dev->if_port == PORT_TP) {
3088 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3089 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3090 np->advertising = data->val_in;
3091 mdio_write(dev, data->reg_num & 0x1f,
3095 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3096 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3097 np->advertising = data->val_in;
3099 move_int_phy(dev, data->phy_id & 0x1f);
3100 miiport_write(dev, data->phy_id & 0x1f,
3101 data->reg_num & 0x1f,
3110 static void enable_wol_mode(struct net_device *dev, int enable_intr)
3112 void __iomem * ioaddr = ns_ioaddr(dev);
3113 struct netdev_private *np = netdev_priv(dev);
3115 if (netif_msg_wol(np))
3116 printk(KERN_INFO "%s: remaining active for wake-on-lan\n",
3119 /* For WOL we must restart the rx process in silent mode.
3120 * Write NULL to the RxRingPtr. Only possible if
3121 * rx process is stopped
3123 writel(0, ioaddr + RxRingPtr);
3125 /* read WoL status to clear */
3126 readl(ioaddr + WOLCmd);
3128 /* PME on, clear status */
3129 writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun);
3131 /* and restart the rx process */
3132 writel(RxOn, ioaddr + ChipCmd);
3135 /* enable the WOL interrupt.
3136 * Could be used to send a netlink message.
3138 writel(WOLPkt | LinkChange, ioaddr + IntrMask);
3139 natsemi_irq_enable(dev);
3143 static int netdev_close(struct net_device *dev)
3145 void __iomem * ioaddr = ns_ioaddr(dev);
3146 struct netdev_private *np = netdev_priv(dev);
3148 if (netif_msg_ifdown(np))
3150 "%s: Shutting down ethercard, status was %#04x.\n",
3151 dev->name, (int)readl(ioaddr + ChipCmd));
3152 if (netif_msg_pktdata(np))
3154 "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
3155 dev->name, np->cur_tx, np->dirty_tx,
3156 np->cur_rx, np->dirty_rx);
3159 * FIXME: what if someone tries to close a device
3160 * that is suspended?
3161 * Should we reenable the nic to switch to
3162 * the final WOL settings?
3165 del_timer_sync(&np->timer);
3166 disable_irq(dev->irq);
3167 spin_lock_irq(&np->lock);
3168 natsemi_irq_disable(dev);
3170 spin_unlock_irq(&np->lock);
3171 enable_irq(dev->irq);
3173 free_irq(dev->irq, dev);
3175 /* Interrupt disabled, interrupt handler released,
3176 * queue stopped, timer deleted, rtnl_lock held
3177 * All async codepaths that access the driver are disabled.
3179 spin_lock_irq(&np->lock);
3181 readl(ioaddr + IntrMask);
3182 readw(ioaddr + MIntrStatus);
3185 writel(StatsFreeze, ioaddr + StatsCtrl);
3187 /* Stop the chip's Tx and Rx processes. */
3188 natsemi_stop_rxtx(dev);
3191 spin_unlock_irq(&np->lock);
3193 /* clear the carrier last - an interrupt could reenable it otherwise */
3194 netif_carrier_off(dev);
3195 netif_stop_queue(dev);
3202 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3204 /* restart the NIC in WOL mode.
3205 * The nic must be stopped for this.
3207 enable_wol_mode(dev, 0);
3209 /* Restore PME enable bit unmolested */
3210 writel(np->SavedClkRun, ioaddr + ClkRun);
3217 static void __devexit natsemi_remove1 (struct pci_dev *pdev)
3219 struct net_device *dev = pci_get_drvdata(pdev);
3220 void __iomem * ioaddr = ns_ioaddr(dev);
3222 NATSEMI_REMOVE_FILE(pdev, dspcfg_workaround);
3223 unregister_netdev (dev);
3224 pci_release_regions (pdev);
3227 pci_set_drvdata(pdev, NULL);
3233 * The ns83815 chip doesn't have explicit RxStop bits.
3234 * Kicking the Rx or Tx process for a new packet reenables the Rx process
3235 * of the nic, thus this function must be very careful:
3237 * suspend/resume synchronization:
3239 * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
3240 * start_tx, tx_timeout
3242 * No function accesses the hardware without checking np->hands_off.
3243 * the check occurs under spin_lock_irq(&np->lock);
3245 * * netdev_ioctl: noncritical access.
3246 * * netdev_open: cannot happen due to the device_detach
3247 * * netdev_close: doesn't hurt.
3248 * * netdev_timer: timer stopped by natsemi_suspend.
3249 * * intr_handler: doesn't acquire the spinlock. suspend calls
3250 * disable_irq() to enforce synchronization.
3251 * * natsemi_poll: checks before reenabling interrupts. suspend
3252 * sets hands_off, disables interrupts and then waits with
3253 * netif_poll_disable().
3255 * Interrupts must be disabled, otherwise hands_off can cause irq storms.
3258 static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state)
3260 struct net_device *dev = pci_get_drvdata (pdev);
3261 struct netdev_private *np = netdev_priv(dev);
3262 void __iomem * ioaddr = ns_ioaddr(dev);
3265 if (netif_running (dev)) {
3266 del_timer_sync(&np->timer);
3268 disable_irq(dev->irq);
3269 spin_lock_irq(&np->lock);
3271 natsemi_irq_disable(dev);
3273 natsemi_stop_rxtx(dev);
3274 netif_stop_queue(dev);
3276 spin_unlock_irq(&np->lock);
3277 enable_irq(dev->irq);
3279 netif_poll_disable(dev);
3281 /* Update the error counts. */
3284 /* pci_power_off(pdev, -1); */
3287 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3288 /* Restore PME enable bit */
3290 /* restart the NIC in WOL mode.
3291 * The nic must be stopped for this.
3292 * FIXME: use the WOL interrupt
3294 enable_wol_mode(dev, 0);
3296 /* Restore PME enable bit unmolested */
3297 writel(np->SavedClkRun, ioaddr + ClkRun);
3301 netif_device_detach(dev);
3307 static int natsemi_resume (struct pci_dev *pdev)
3309 struct net_device *dev = pci_get_drvdata (pdev);
3310 struct netdev_private *np = netdev_priv(dev);
3313 if (netif_device_present(dev))
3315 if (netif_running(dev)) {
3316 BUG_ON(!np->hands_off);
3317 pci_enable_device(pdev);
3318 /* pci_power_on(pdev); */
3322 disable_irq(dev->irq);
3323 spin_lock_irq(&np->lock);
3325 init_registers(dev);
3326 netif_device_attach(dev);
3327 spin_unlock_irq(&np->lock);
3328 enable_irq(dev->irq);
3330 mod_timer(&np->timer, jiffies + 1*HZ);
3332 netif_device_attach(dev);
3333 netif_poll_enable(dev);
3339 #endif /* CONFIG_PM */
3341 static struct pci_driver natsemi_driver = {
3343 .id_table = natsemi_pci_tbl,
3344 .probe = natsemi_probe1,
3345 .remove = __devexit_p(natsemi_remove1),
3347 .suspend = natsemi_suspend,
3348 .resume = natsemi_resume,
3352 static int __init natsemi_init_mod (void)
3354 /* when a module, this is printed whether or not devices are found in probe */
3359 return pci_register_driver(&natsemi_driver);
3362 static void __exit natsemi_exit_mod (void)
3364 pci_unregister_driver (&natsemi_driver);
3367 module_init(natsemi_init_mod);
3368 module_exit(natsemi_exit_mod);