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 5*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 *dev;
564 struct napi_struct napi;
565 struct net_device_stats stats;
566 /* Media monitoring timer */
567 struct timer_list timer;
568 /* Frequently used values: keep some adjacent for cache effect */
569 struct pci_dev *pci_dev;
570 struct netdev_desc *rx_head_desc;
571 /* Producer/consumer ring indices */
572 unsigned int cur_rx, dirty_rx;
573 unsigned int cur_tx, dirty_tx;
574 /* Based on MTU+slack. */
575 unsigned int rx_buf_sz;
577 /* Interrupt status */
579 /* Do not touch the nic registers */
581 /* Don't pay attention to the reported link state. */
583 /* external phy that is used: only valid if dev->if_port != PORT_TP */
585 int phy_addr_external;
586 unsigned int full_duplex;
590 /* FIFO and PCI burst thresholds */
591 u32 tx_config, rx_config;
592 /* original contents of ClkRun register */
594 /* silicon revision */
596 /* expected DSPCFG value */
598 int dspcfg_workaround;
599 /* parms saved in ethtool format */
600 u16 speed; /* The forced speed, 10Mb, 100Mb, gigabit */
601 u8 duplex; /* Duplex, half or full */
602 u8 autoneg; /* Autonegotiation enabled */
603 /* MII transceiver section */
612 static void move_int_phy(struct net_device *dev, int addr);
613 static int eeprom_read(void __iomem *ioaddr, int location);
614 static int mdio_read(struct net_device *dev, int reg);
615 static void mdio_write(struct net_device *dev, int reg, u16 data);
616 static void init_phy_fixup(struct net_device *dev);
617 static int miiport_read(struct net_device *dev, int phy_id, int reg);
618 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data);
619 static int find_mii(struct net_device *dev);
620 static void natsemi_reset(struct net_device *dev);
621 static void natsemi_reload_eeprom(struct net_device *dev);
622 static void natsemi_stop_rxtx(struct net_device *dev);
623 static int netdev_open(struct net_device *dev);
624 static void do_cable_magic(struct net_device *dev);
625 static void undo_cable_magic(struct net_device *dev);
626 static void check_link(struct net_device *dev);
627 static void netdev_timer(unsigned long data);
628 static void dump_ring(struct net_device *dev);
629 static void tx_timeout(struct net_device *dev);
630 static int alloc_ring(struct net_device *dev);
631 static void refill_rx(struct net_device *dev);
632 static void init_ring(struct net_device *dev);
633 static void drain_tx(struct net_device *dev);
634 static void drain_ring(struct net_device *dev);
635 static void free_ring(struct net_device *dev);
636 static void reinit_ring(struct net_device *dev);
637 static void init_registers(struct net_device *dev);
638 static int start_tx(struct sk_buff *skb, struct net_device *dev);
639 static irqreturn_t intr_handler(int irq, void *dev_instance);
640 static void netdev_error(struct net_device *dev, int intr_status);
641 static int natsemi_poll(struct napi_struct *napi, int budget);
642 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do);
643 static void netdev_tx_done(struct net_device *dev);
644 static int natsemi_change_mtu(struct net_device *dev, int new_mtu);
645 #ifdef CONFIG_NET_POLL_CONTROLLER
646 static void natsemi_poll_controller(struct net_device *dev);
648 static void __set_rx_mode(struct net_device *dev);
649 static void set_rx_mode(struct net_device *dev);
650 static void __get_stats(struct net_device *dev);
651 static struct net_device_stats *get_stats(struct net_device *dev);
652 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
653 static int netdev_set_wol(struct net_device *dev, u32 newval);
654 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur);
655 static int netdev_set_sopass(struct net_device *dev, u8 *newval);
656 static int netdev_get_sopass(struct net_device *dev, u8 *data);
657 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
658 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd);
659 static void enable_wol_mode(struct net_device *dev, int enable_intr);
660 static int netdev_close(struct net_device *dev);
661 static int netdev_get_regs(struct net_device *dev, u8 *buf);
662 static int netdev_get_eeprom(struct net_device *dev, u8 *buf);
663 static const struct ethtool_ops ethtool_ops;
665 #define NATSEMI_ATTR(_name) \
666 static ssize_t natsemi_show_##_name(struct device *dev, \
667 struct device_attribute *attr, char *buf); \
668 static ssize_t natsemi_set_##_name(struct device *dev, \
669 struct device_attribute *attr, \
670 const char *buf, size_t count); \
671 static DEVICE_ATTR(_name, 0644, natsemi_show_##_name, natsemi_set_##_name)
673 #define NATSEMI_CREATE_FILE(_dev, _name) \
674 device_create_file(&_dev->dev, &dev_attr_##_name)
675 #define NATSEMI_REMOVE_FILE(_dev, _name) \
676 device_remove_file(&_dev->dev, &dev_attr_##_name)
678 NATSEMI_ATTR(dspcfg_workaround);
680 static ssize_t natsemi_show_dspcfg_workaround(struct device *dev,
681 struct device_attribute *attr,
684 struct netdev_private *np = netdev_priv(to_net_dev(dev));
686 return sprintf(buf, "%s\n", np->dspcfg_workaround ? "on" : "off");
689 static ssize_t natsemi_set_dspcfg_workaround(struct device *dev,
690 struct device_attribute *attr,
691 const char *buf, size_t count)
693 struct netdev_private *np = netdev_priv(to_net_dev(dev));
697 /* Find out the new setting */
698 if (!strncmp("on", buf, count - 1) || !strncmp("1", buf, count - 1))
700 else if (!strncmp("off", buf, count - 1)
701 || !strncmp("0", buf, count - 1))
706 spin_lock_irqsave(&np->lock, flags);
708 np->dspcfg_workaround = new_setting;
710 spin_unlock_irqrestore(&np->lock, flags);
715 static inline void __iomem *ns_ioaddr(struct net_device *dev)
717 return (void __iomem *) dev->base_addr;
720 static inline void natsemi_irq_enable(struct net_device *dev)
722 writel(1, ns_ioaddr(dev) + IntrEnable);
723 readl(ns_ioaddr(dev) + IntrEnable);
726 static inline void natsemi_irq_disable(struct net_device *dev)
728 writel(0, ns_ioaddr(dev) + IntrEnable);
729 readl(ns_ioaddr(dev) + IntrEnable);
732 static void move_int_phy(struct net_device *dev, int addr)
734 struct netdev_private *np = netdev_priv(dev);
735 void __iomem *ioaddr = ns_ioaddr(dev);
739 * The internal phy is visible on the external mii bus. Therefore we must
740 * move it away before we can send commands to an external phy.
741 * There are two addresses we must avoid:
742 * - the address on the external phy that is used for transmission.
743 * - the address that we want to access. User space can access phys
744 * on the mii bus with SIOCGMIIREG/SIOCSMIIREG, independant from the
745 * phy that is used for transmission.
750 if (target == np->phy_addr_external)
752 writew(target, ioaddr + PhyCtrl);
753 readw(ioaddr + PhyCtrl);
757 static void __devinit natsemi_init_media (struct net_device *dev)
759 struct netdev_private *np = netdev_priv(dev);
763 netif_carrier_on(dev);
765 netif_carrier_off(dev);
767 /* get the initial settings from hardware */
768 tmp = mdio_read(dev, MII_BMCR);
769 np->speed = (tmp & BMCR_SPEED100)? SPEED_100 : SPEED_10;
770 np->duplex = (tmp & BMCR_FULLDPLX)? DUPLEX_FULL : DUPLEX_HALF;
771 np->autoneg = (tmp & BMCR_ANENABLE)? AUTONEG_ENABLE: AUTONEG_DISABLE;
772 np->advertising= mdio_read(dev, MII_ADVERTISE);
774 if ((np->advertising & ADVERTISE_ALL) != ADVERTISE_ALL
775 && netif_msg_probe(np)) {
776 printk(KERN_INFO "natsemi %s: Transceiver default autonegotiation %s "
778 pci_name(np->pci_dev),
779 (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE)?
780 "enabled, advertise" : "disabled, force",
782 (ADVERTISE_100FULL|ADVERTISE_100HALF))?
785 (ADVERTISE_100FULL|ADVERTISE_10FULL))?
788 if (netif_msg_probe(np))
790 "natsemi %s: Transceiver status %#04x advertising %#04x.\n",
791 pci_name(np->pci_dev), mdio_read(dev, MII_BMSR),
796 static int __devinit natsemi_probe1 (struct pci_dev *pdev,
797 const struct pci_device_id *ent)
799 struct net_device *dev;
800 struct netdev_private *np;
801 int i, option, irq, chip_idx = ent->driver_data;
802 static int find_cnt = -1;
803 unsigned long iostart, iosize;
804 void __iomem *ioaddr;
805 const int pcibar = 1; /* PCI base address register */
808 DECLARE_MAC_BUF(mac);
810 /* when built into the kernel, we only print version if device is found */
812 static int printed_version;
813 if (!printed_version++)
817 i = pci_enable_device(pdev);
820 /* natsemi has a non-standard PM control register
821 * in PCI config space. Some boards apparently need
822 * to be brought to D0 in this manner.
824 pci_read_config_dword(pdev, PCIPM, &tmp);
825 if (tmp & PCI_PM_CTRL_STATE_MASK) {
826 /* D0 state, disable PME assertion */
827 u32 newtmp = tmp & ~PCI_PM_CTRL_STATE_MASK;
828 pci_write_config_dword(pdev, PCIPM, newtmp);
832 iostart = pci_resource_start(pdev, pcibar);
833 iosize = pci_resource_len(pdev, pcibar);
836 pci_set_master(pdev);
838 dev = alloc_etherdev(sizeof (struct netdev_private));
841 SET_NETDEV_DEV(dev, &pdev->dev);
843 i = pci_request_regions(pdev, DRV_NAME);
845 goto err_pci_request_regions;
847 ioaddr = ioremap(iostart, iosize);
853 /* Work around the dropped serial bit. */
854 prev_eedata = eeprom_read(ioaddr, 6);
855 for (i = 0; i < 3; i++) {
856 int eedata = eeprom_read(ioaddr, i + 7);
857 dev->dev_addr[i*2] = (eedata << 1) + (prev_eedata >> 15);
858 dev->dev_addr[i*2+1] = eedata >> 7;
859 prev_eedata = eedata;
862 dev->base_addr = (unsigned long __force) ioaddr;
865 np = netdev_priv(dev);
866 netif_napi_add(dev, &np->napi, natsemi_poll, 64);
869 pci_set_drvdata(pdev, dev);
871 spin_lock_init(&np->lock);
872 np->msg_enable = (debug >= 0) ? (1<<debug)-1 : NATSEMI_DEF_MSG;
875 np->eeprom_size = natsemi_pci_info[chip_idx].eeprom_size;
876 if (natsemi_pci_info[chip_idx].flags & NATSEMI_FLAG_IGNORE_PHY)
880 np->dspcfg_workaround = dspcfg_workaround;
883 * - If configured to ignore the PHY set up for external.
884 * - If the nic was configured to use an external phy and if find_mii
885 * finds a phy: use external port, first phy that replies.
886 * - Otherwise: internal port.
887 * Note that the phy address for the internal phy doesn't matter:
888 * The address would be used to access a phy over the mii bus, but
889 * the internal phy is accessed through mapped registers.
891 if (np->ignore_phy || readl(ioaddr + ChipConfig) & CfgExtPhy)
892 dev->if_port = PORT_MII;
894 dev->if_port = PORT_TP;
895 /* Reset the chip to erase previous misconfiguration. */
896 natsemi_reload_eeprom(dev);
899 if (dev->if_port != PORT_TP) {
900 np->phy_addr_external = find_mii(dev);
901 /* If we're ignoring the PHY it doesn't matter if we can't
903 if (!np->ignore_phy && np->phy_addr_external == PHY_ADDR_NONE) {
904 dev->if_port = PORT_TP;
905 np->phy_addr_external = PHY_ADDR_INTERNAL;
908 np->phy_addr_external = PHY_ADDR_INTERNAL;
911 option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
913 option = dev->mem_start;
915 /* The lower four bits are the media type. */
921 "natsemi %s: ignoring user supplied media type %d",
922 pci_name(np->pci_dev), option & 15);
924 if (find_cnt < MAX_UNITS && full_duplex[find_cnt])
927 /* The chip-specific entries in the device structure. */
928 dev->open = &netdev_open;
929 dev->hard_start_xmit = &start_tx;
930 dev->stop = &netdev_close;
931 dev->get_stats = &get_stats;
932 dev->set_multicast_list = &set_rx_mode;
933 dev->change_mtu = &natsemi_change_mtu;
934 dev->do_ioctl = &netdev_ioctl;
935 dev->tx_timeout = &tx_timeout;
936 dev->watchdog_timeo = TX_TIMEOUT;
938 #ifdef CONFIG_NET_POLL_CONTROLLER
939 dev->poll_controller = &natsemi_poll_controller;
941 SET_ETHTOOL_OPS(dev, ðtool_ops);
946 natsemi_init_media(dev);
948 /* save the silicon revision for later querying */
949 np->srr = readl(ioaddr + SiliconRev);
950 if (netif_msg_hw(np))
951 printk(KERN_INFO "natsemi %s: silicon revision %#04x.\n",
952 pci_name(np->pci_dev), np->srr);
954 i = register_netdev(dev);
956 goto err_register_netdev;
958 if (NATSEMI_CREATE_FILE(pdev, dspcfg_workaround))
959 goto err_create_file;
961 if (netif_msg_drv(np)) {
962 printk(KERN_INFO "natsemi %s: %s at %#08lx "
964 dev->name, natsemi_pci_info[chip_idx].name, iostart,
965 pci_name(np->pci_dev), print_mac(mac, dev->dev_addr), irq);
966 if (dev->if_port == PORT_TP)
967 printk(", port TP.\n");
968 else if (np->ignore_phy)
969 printk(", port MII, ignoring PHY\n");
971 printk(", port MII, phy ad %d.\n", np->phy_addr_external);
976 unregister_netdev(dev);
982 pci_release_regions(pdev);
983 pci_set_drvdata(pdev, NULL);
985 err_pci_request_regions:
991 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces.
992 The EEPROM code is for the common 93c06/46 EEPROMs with 6 bit addresses. */
994 /* Delay between EEPROM clock transitions.
995 No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
996 a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
997 made udelay() unreliable.
998 The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
1001 #define eeprom_delay(ee_addr) readl(ee_addr)
1003 #define EE_Write0 (EE_ChipSelect)
1004 #define EE_Write1 (EE_ChipSelect | EE_DataIn)
1006 /* The EEPROM commands include the alway-set leading bit. */
1008 EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
1011 static int eeprom_read(void __iomem *addr, int location)
1015 void __iomem *ee_addr = addr + EECtrl;
1016 int read_cmd = location | EE_ReadCmd;
1018 writel(EE_Write0, ee_addr);
1020 /* Shift the read command bits out. */
1021 for (i = 10; i >= 0; i--) {
1022 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
1023 writel(dataval, ee_addr);
1024 eeprom_delay(ee_addr);
1025 writel(dataval | EE_ShiftClk, ee_addr);
1026 eeprom_delay(ee_addr);
1028 writel(EE_ChipSelect, ee_addr);
1029 eeprom_delay(ee_addr);
1031 for (i = 0; i < 16; i++) {
1032 writel(EE_ChipSelect | EE_ShiftClk, ee_addr);
1033 eeprom_delay(ee_addr);
1034 retval |= (readl(ee_addr) & EE_DataOut) ? 1 << i : 0;
1035 writel(EE_ChipSelect, ee_addr);
1036 eeprom_delay(ee_addr);
1039 /* Terminate the EEPROM access. */
1040 writel(EE_Write0, ee_addr);
1045 /* MII transceiver control section.
1046 * The 83815 series has an internal transceiver, and we present the
1047 * internal management registers as if they were MII connected.
1048 * External Phy registers are referenced through the MII interface.
1051 /* clock transitions >= 20ns (25MHz)
1052 * One readl should be good to PCI @ 100MHz
1054 #define mii_delay(ioaddr) readl(ioaddr + EECtrl)
1056 static int mii_getbit (struct net_device *dev)
1059 void __iomem *ioaddr = ns_ioaddr(dev);
1061 writel(MII_ShiftClk, ioaddr + EECtrl);
1062 data = readl(ioaddr + EECtrl);
1063 writel(0, ioaddr + EECtrl);
1065 return (data & MII_Data)? 1 : 0;
1068 static void mii_send_bits (struct net_device *dev, u32 data, int len)
1071 void __iomem *ioaddr = ns_ioaddr(dev);
1073 for (i = (1 << (len-1)); i; i >>= 1)
1075 u32 mdio_val = MII_Write | ((data & i)? MII_Data : 0);
1076 writel(mdio_val, ioaddr + EECtrl);
1078 writel(mdio_val | MII_ShiftClk, ioaddr + EECtrl);
1081 writel(0, ioaddr + EECtrl);
1085 static int miiport_read(struct net_device *dev, int phy_id, int reg)
1092 mii_send_bits (dev, 0xffffffff, 32);
1093 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1094 /* ST,OP = 0110'b for read operation */
1095 cmd = (0x06 << 10) | (phy_id << 5) | reg;
1096 mii_send_bits (dev, cmd, 14);
1098 if (mii_getbit (dev))
1101 for (i = 0; i < 16; i++) {
1103 retval |= mii_getbit (dev);
1110 static void miiport_write(struct net_device *dev, int phy_id, int reg, u16 data)
1115 mii_send_bits (dev, 0xffffffff, 32);
1116 /* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
1117 /* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */
1118 cmd = (0x5002 << 16) | (phy_id << 23) | (reg << 18) | data;
1119 mii_send_bits (dev, cmd, 32);
1124 static int mdio_read(struct net_device *dev, int reg)
1126 struct netdev_private *np = netdev_priv(dev);
1127 void __iomem *ioaddr = ns_ioaddr(dev);
1129 /* The 83815 series has two ports:
1130 * - an internal transceiver
1131 * - an external mii bus
1133 if (dev->if_port == PORT_TP)
1134 return readw(ioaddr+BasicControl+(reg<<2));
1136 return miiport_read(dev, np->phy_addr_external, reg);
1139 static void mdio_write(struct net_device *dev, int reg, u16 data)
1141 struct netdev_private *np = netdev_priv(dev);
1142 void __iomem *ioaddr = ns_ioaddr(dev);
1144 /* The 83815 series has an internal transceiver; handle separately */
1145 if (dev->if_port == PORT_TP)
1146 writew(data, ioaddr+BasicControl+(reg<<2));
1148 miiport_write(dev, np->phy_addr_external, reg, data);
1151 static void init_phy_fixup(struct net_device *dev)
1153 struct netdev_private *np = netdev_priv(dev);
1154 void __iomem *ioaddr = ns_ioaddr(dev);
1159 /* restore stuff lost when power was out */
1160 tmp = mdio_read(dev, MII_BMCR);
1161 if (np->autoneg == AUTONEG_ENABLE) {
1162 /* renegotiate if something changed */
1163 if ((tmp & BMCR_ANENABLE) == 0
1164 || np->advertising != mdio_read(dev, MII_ADVERTISE))
1166 /* turn on autonegotiation and force negotiation */
1167 tmp |= (BMCR_ANENABLE | BMCR_ANRESTART);
1168 mdio_write(dev, MII_ADVERTISE, np->advertising);
1171 /* turn off auto negotiation, set speed and duplexity */
1172 tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX);
1173 if (np->speed == SPEED_100)
1174 tmp |= BMCR_SPEED100;
1175 if (np->duplex == DUPLEX_FULL)
1176 tmp |= BMCR_FULLDPLX;
1178 * Note: there is no good way to inform the link partner
1179 * that our capabilities changed. The user has to unplug
1180 * and replug the network cable after some changes, e.g.
1181 * after switching from 10HD, autoneg off to 100 HD,
1185 mdio_write(dev, MII_BMCR, tmp);
1186 readl(ioaddr + ChipConfig);
1189 /* find out what phy this is */
1190 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1191 + mdio_read(dev, MII_PHYSID2);
1193 /* handle external phys here */
1195 case PHYID_AM79C874:
1196 /* phy specific configuration for fibre/tp operation */
1197 tmp = mdio_read(dev, MII_MCTRL);
1198 tmp &= ~(MII_FX_SEL | MII_EN_SCRM);
1199 if (dev->if_port == PORT_FIBRE)
1203 mdio_write(dev, MII_MCTRL, tmp);
1208 cfg = readl(ioaddr + ChipConfig);
1209 if (cfg & CfgExtPhy)
1212 /* On page 78 of the spec, they recommend some settings for "optimum
1213 performance" to be done in sequence. These settings optimize some
1214 of the 100Mbit autodetection circuitry. They say we only want to
1215 do this for rev C of the chip, but engineers at NSC (Bradley
1216 Kennedy) recommends always setting them. If you don't, you get
1217 errors on some autonegotiations that make the device unusable.
1219 It seems that the DSP needs a few usec to reinitialize after
1220 the start of the phy. Just retry writing these values until they
1223 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1226 writew(1, ioaddr + PGSEL);
1227 writew(PMDCSR_VAL, ioaddr + PMDCSR);
1228 writew(TSTDAT_VAL, ioaddr + TSTDAT);
1229 np->dspcfg = (np->srr <= SRR_DP83815_C)?
1230 DSPCFG_VAL : (DSPCFG_COEF | readw(ioaddr + DSPCFG));
1231 writew(np->dspcfg, ioaddr + DSPCFG);
1232 writew(SDCFG_VAL, ioaddr + SDCFG);
1233 writew(0, ioaddr + PGSEL);
1234 readl(ioaddr + ChipConfig);
1237 writew(1, ioaddr + PGSEL);
1238 dspcfg = readw(ioaddr + DSPCFG);
1239 writew(0, ioaddr + PGSEL);
1240 if (np->dspcfg == dspcfg)
1244 if (netif_msg_link(np)) {
1245 if (i==NATSEMI_HW_TIMEOUT) {
1247 "%s: DSPCFG mismatch after retrying for %d usec.\n",
1251 "%s: DSPCFG accepted after %d usec.\n",
1256 * Enable PHY Specific event based interrupts. Link state change
1257 * and Auto-Negotiation Completion are among the affected.
1258 * Read the intr status to clear it (needed for wake events).
1260 readw(ioaddr + MIntrStatus);
1261 writew(MICRIntEn, ioaddr + MIntrCtrl);
1264 static int switch_port_external(struct net_device *dev)
1266 struct netdev_private *np = netdev_priv(dev);
1267 void __iomem *ioaddr = ns_ioaddr(dev);
1270 cfg = readl(ioaddr + ChipConfig);
1271 if (cfg & CfgExtPhy)
1274 if (netif_msg_link(np)) {
1275 printk(KERN_INFO "%s: switching to external transceiver.\n",
1279 /* 1) switch back to external phy */
1280 writel(cfg | (CfgExtPhy | CfgPhyDis), ioaddr + ChipConfig);
1281 readl(ioaddr + ChipConfig);
1284 /* 2) reset the external phy: */
1285 /* resetting the external PHY has been known to cause a hub supplying
1286 * power over Ethernet to kill the power. We don't want to kill
1287 * power to this computer, so we avoid resetting the phy.
1290 /* 3) reinit the phy fixup, it got lost during power down. */
1291 move_int_phy(dev, np->phy_addr_external);
1292 init_phy_fixup(dev);
1297 static int switch_port_internal(struct net_device *dev)
1299 struct netdev_private *np = netdev_priv(dev);
1300 void __iomem *ioaddr = ns_ioaddr(dev);
1305 cfg = readl(ioaddr + ChipConfig);
1306 if (!(cfg &CfgExtPhy))
1309 if (netif_msg_link(np)) {
1310 printk(KERN_INFO "%s: switching to internal transceiver.\n",
1313 /* 1) switch back to internal phy: */
1314 cfg = cfg & ~(CfgExtPhy | CfgPhyDis);
1315 writel(cfg, ioaddr + ChipConfig);
1316 readl(ioaddr + ChipConfig);
1319 /* 2) reset the internal phy: */
1320 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1321 writel(bmcr | BMCR_RESET, ioaddr+BasicControl+(MII_BMCR<<2));
1322 readl(ioaddr + ChipConfig);
1324 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1325 bmcr = readw(ioaddr+BasicControl+(MII_BMCR<<2));
1326 if (!(bmcr & BMCR_RESET))
1330 if (i==NATSEMI_HW_TIMEOUT && netif_msg_link(np)) {
1332 "%s: phy reset did not complete in %d usec.\n",
1335 /* 3) reinit the phy fixup, it got lost during power down. */
1336 init_phy_fixup(dev);
1341 /* Scan for a PHY on the external mii bus.
1342 * There are two tricky points:
1343 * - Do not scan while the internal phy is enabled. The internal phy will
1344 * crash: e.g. reads from the DSPCFG register will return odd values and
1345 * the nasty random phy reset code will reset the nic every few seconds.
1346 * - The internal phy must be moved around, an external phy could
1347 * have the same address as the internal phy.
1349 static int find_mii(struct net_device *dev)
1351 struct netdev_private *np = netdev_priv(dev);
1356 /* Switch to external phy */
1357 did_switch = switch_port_external(dev);
1359 /* Scan the possible phy addresses:
1361 * PHY address 0 means that the phy is in isolate mode. Not yet
1362 * supported due to lack of test hardware. User space should
1363 * handle it through ethtool.
1365 for (i = 1; i <= 31; i++) {
1366 move_int_phy(dev, i);
1367 tmp = miiport_read(dev, i, MII_BMSR);
1368 if (tmp != 0xffff && tmp != 0x0000) {
1369 /* found something! */
1370 np->mii = (mdio_read(dev, MII_PHYSID1) << 16)
1371 + mdio_read(dev, MII_PHYSID2);
1372 if (netif_msg_probe(np)) {
1373 printk(KERN_INFO "natsemi %s: found external phy %08x at address %d.\n",
1374 pci_name(np->pci_dev), np->mii, i);
1379 /* And switch back to internal phy: */
1381 switch_port_internal(dev);
1385 /* CFG bits [13:16] [18:23] */
1386 #define CFG_RESET_SAVE 0xfde000
1387 /* WCSR bits [0:4] [9:10] */
1388 #define WCSR_RESET_SAVE 0x61f
1389 /* RFCR bits [20] [22] [27:31] */
1390 #define RFCR_RESET_SAVE 0xf8500000;
1392 static void natsemi_reset(struct net_device *dev)
1400 struct netdev_private *np = netdev_priv(dev);
1401 void __iomem *ioaddr = ns_ioaddr(dev);
1404 * Resetting the chip causes some registers to be lost.
1405 * Natsemi suggests NOT reloading the EEPROM while live, so instead
1406 * we save the state that would have been loaded from EEPROM
1407 * on a normal power-up (see the spec EEPROM map). This assumes
1408 * whoever calls this will follow up with init_registers() eventually.
1412 cfg = readl(ioaddr + ChipConfig) & CFG_RESET_SAVE;
1414 wcsr = readl(ioaddr + WOLCmd) & WCSR_RESET_SAVE;
1416 rfcr = readl(ioaddr + RxFilterAddr) & RFCR_RESET_SAVE;
1418 for (i = 0; i < 3; i++) {
1419 writel(i*2, ioaddr + RxFilterAddr);
1420 pmatch[i] = readw(ioaddr + RxFilterData);
1423 for (i = 0; i < 3; i++) {
1424 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1425 sopass[i] = readw(ioaddr + RxFilterData);
1428 /* now whack the chip */
1429 writel(ChipReset, ioaddr + ChipCmd);
1430 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1431 if (!(readl(ioaddr + ChipCmd) & ChipReset))
1435 if (i==NATSEMI_HW_TIMEOUT) {
1436 printk(KERN_WARNING "%s: reset did not complete in %d usec.\n",
1438 } else if (netif_msg_hw(np)) {
1439 printk(KERN_DEBUG "%s: reset completed in %d usec.\n",
1444 cfg |= readl(ioaddr + ChipConfig) & ~CFG_RESET_SAVE;
1445 /* turn on external phy if it was selected */
1446 if (dev->if_port == PORT_TP)
1447 cfg &= ~(CfgExtPhy | CfgPhyDis);
1449 cfg |= (CfgExtPhy | CfgPhyDis);
1450 writel(cfg, ioaddr + ChipConfig);
1452 wcsr |= readl(ioaddr + WOLCmd) & ~WCSR_RESET_SAVE;
1453 writel(wcsr, ioaddr + WOLCmd);
1455 rfcr |= readl(ioaddr + RxFilterAddr) & ~RFCR_RESET_SAVE;
1456 /* restore PMATCH */
1457 for (i = 0; i < 3; i++) {
1458 writel(i*2, ioaddr + RxFilterAddr);
1459 writew(pmatch[i], ioaddr + RxFilterData);
1461 for (i = 0; i < 3; i++) {
1462 writel(0xa+(i*2), ioaddr + RxFilterAddr);
1463 writew(sopass[i], ioaddr + RxFilterData);
1466 writel(rfcr, ioaddr + RxFilterAddr);
1469 static void reset_rx(struct net_device *dev)
1472 struct netdev_private *np = netdev_priv(dev);
1473 void __iomem *ioaddr = ns_ioaddr(dev);
1475 np->intr_status &= ~RxResetDone;
1477 writel(RxReset, ioaddr + ChipCmd);
1479 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1480 np->intr_status |= readl(ioaddr + IntrStatus);
1481 if (np->intr_status & RxResetDone)
1485 if (i==NATSEMI_HW_TIMEOUT) {
1486 printk(KERN_WARNING "%s: RX reset did not complete in %d usec.\n",
1488 } else if (netif_msg_hw(np)) {
1489 printk(KERN_WARNING "%s: RX reset took %d usec.\n",
1494 static void natsemi_reload_eeprom(struct net_device *dev)
1496 struct netdev_private *np = netdev_priv(dev);
1497 void __iomem *ioaddr = ns_ioaddr(dev);
1500 writel(EepromReload, ioaddr + PCIBusCfg);
1501 for (i=0;i<NATSEMI_HW_TIMEOUT;i++) {
1503 if (!(readl(ioaddr + PCIBusCfg) & EepromReload))
1506 if (i==NATSEMI_HW_TIMEOUT) {
1507 printk(KERN_WARNING "natsemi %s: EEPROM did not reload in %d usec.\n",
1508 pci_name(np->pci_dev), i*50);
1509 } else if (netif_msg_hw(np)) {
1510 printk(KERN_DEBUG "natsemi %s: EEPROM reloaded in %d usec.\n",
1511 pci_name(np->pci_dev), i*50);
1515 static void natsemi_stop_rxtx(struct net_device *dev)
1517 void __iomem * ioaddr = ns_ioaddr(dev);
1518 struct netdev_private *np = netdev_priv(dev);
1521 writel(RxOff | TxOff, ioaddr + ChipCmd);
1522 for(i=0;i< NATSEMI_HW_TIMEOUT;i++) {
1523 if ((readl(ioaddr + ChipCmd) & (TxOn|RxOn)) == 0)
1527 if (i==NATSEMI_HW_TIMEOUT) {
1528 printk(KERN_WARNING "%s: Tx/Rx process did not stop in %d usec.\n",
1530 } else if (netif_msg_hw(np)) {
1531 printk(KERN_DEBUG "%s: Tx/Rx process stopped in %d usec.\n",
1536 static int netdev_open(struct net_device *dev)
1538 struct netdev_private *np = netdev_priv(dev);
1539 void __iomem * ioaddr = ns_ioaddr(dev);
1542 /* Reset the chip, just in case. */
1545 i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev);
1548 if (netif_msg_ifup(np))
1549 printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
1550 dev->name, dev->irq);
1551 i = alloc_ring(dev);
1553 free_irq(dev->irq, dev);
1556 napi_enable(&np->napi);
1559 spin_lock_irq(&np->lock);
1560 init_registers(dev);
1561 /* now set the MAC address according to dev->dev_addr */
1562 for (i = 0; i < 3; i++) {
1563 u16 mac = (dev->dev_addr[2*i+1]<<8) + dev->dev_addr[2*i];
1565 writel(i*2, ioaddr + RxFilterAddr);
1566 writew(mac, ioaddr + RxFilterData);
1568 writel(np->cur_rx_mode, ioaddr + RxFilterAddr);
1569 spin_unlock_irq(&np->lock);
1571 netif_start_queue(dev);
1573 if (netif_msg_ifup(np))
1574 printk(KERN_DEBUG "%s: Done netdev_open(), status: %#08x.\n",
1575 dev->name, (int)readl(ioaddr + ChipCmd));
1577 /* Set the timer to check for link beat. */
1578 init_timer(&np->timer);
1579 np->timer.expires = round_jiffies(jiffies + NATSEMI_TIMER_FREQ);
1580 np->timer.data = (unsigned long)dev;
1581 np->timer.function = &netdev_timer; /* timer handler */
1582 add_timer(&np->timer);
1587 static void do_cable_magic(struct net_device *dev)
1589 struct netdev_private *np = netdev_priv(dev);
1590 void __iomem *ioaddr = ns_ioaddr(dev);
1592 if (dev->if_port != PORT_TP)
1595 if (np->srr >= SRR_DP83816_A5)
1599 * 100 MBit links with short cables can trip an issue with the chip.
1600 * The problem manifests as lots of CRC errors and/or flickering
1601 * activity LED while idle. This process is based on instructions
1602 * from engineers at National.
1604 if (readl(ioaddr + ChipConfig) & CfgSpeed100) {
1607 writew(1, ioaddr + PGSEL);
1609 * coefficient visibility should already be enabled via
1612 data = readw(ioaddr + TSTDAT) & 0xff;
1614 * the value must be negative, and within certain values
1615 * (these values all come from National)
1617 if (!(data & 0x80) || ((data >= 0xd8) && (data <= 0xff))) {
1618 np = netdev_priv(dev);
1620 /* the bug has been triggered - fix the coefficient */
1621 writew(TSTDAT_FIXED, ioaddr + TSTDAT);
1622 /* lock the value */
1623 data = readw(ioaddr + DSPCFG);
1624 np->dspcfg = data | DSPCFG_LOCK;
1625 writew(np->dspcfg, ioaddr + DSPCFG);
1627 writew(0, ioaddr + PGSEL);
1631 static void undo_cable_magic(struct net_device *dev)
1634 struct netdev_private *np = netdev_priv(dev);
1635 void __iomem * ioaddr = ns_ioaddr(dev);
1637 if (dev->if_port != PORT_TP)
1640 if (np->srr >= SRR_DP83816_A5)
1643 writew(1, ioaddr + PGSEL);
1644 /* make sure the lock bit is clear */
1645 data = readw(ioaddr + DSPCFG);
1646 np->dspcfg = data & ~DSPCFG_LOCK;
1647 writew(np->dspcfg, ioaddr + DSPCFG);
1648 writew(0, ioaddr + PGSEL);
1651 static void check_link(struct net_device *dev)
1653 struct netdev_private *np = netdev_priv(dev);
1654 void __iomem * ioaddr = ns_ioaddr(dev);
1655 int duplex = np->duplex;
1658 /* If we are ignoring the PHY then don't try reading it. */
1660 goto propagate_state;
1662 /* The link status field is latched: it remains low after a temporary
1663 * link failure until it's read. We need the current link status,
1666 mdio_read(dev, MII_BMSR);
1667 bmsr = mdio_read(dev, MII_BMSR);
1669 if (!(bmsr & BMSR_LSTATUS)) {
1670 if (netif_carrier_ok(dev)) {
1671 if (netif_msg_link(np))
1672 printk(KERN_NOTICE "%s: link down.\n",
1674 netif_carrier_off(dev);
1675 undo_cable_magic(dev);
1679 if (!netif_carrier_ok(dev)) {
1680 if (netif_msg_link(np))
1681 printk(KERN_NOTICE "%s: link up.\n", dev->name);
1682 netif_carrier_on(dev);
1683 do_cable_magic(dev);
1686 duplex = np->full_duplex;
1688 if (bmsr & BMSR_ANEGCOMPLETE) {
1689 int tmp = mii_nway_result(
1690 np->advertising & mdio_read(dev, MII_LPA));
1691 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
1693 } else if (mdio_read(dev, MII_BMCR) & BMCR_FULLDPLX)
1698 /* if duplex is set then bit 28 must be set, too */
1699 if (duplex ^ !!(np->rx_config & RxAcceptTx)) {
1700 if (netif_msg_link(np))
1702 "%s: Setting %s-duplex based on negotiated "
1703 "link capability.\n", dev->name,
1704 duplex ? "full" : "half");
1706 np->rx_config |= RxAcceptTx;
1707 np->tx_config |= TxCarrierIgn | TxHeartIgn;
1709 np->rx_config &= ~RxAcceptTx;
1710 np->tx_config &= ~(TxCarrierIgn | TxHeartIgn);
1712 writel(np->tx_config, ioaddr + TxConfig);
1713 writel(np->rx_config, ioaddr + RxConfig);
1717 static void init_registers(struct net_device *dev)
1719 struct netdev_private *np = netdev_priv(dev);
1720 void __iomem * ioaddr = ns_ioaddr(dev);
1722 init_phy_fixup(dev);
1724 /* clear any interrupts that are pending, such as wake events */
1725 readl(ioaddr + IntrStatus);
1727 writel(np->ring_dma, ioaddr + RxRingPtr);
1728 writel(np->ring_dma + RX_RING_SIZE * sizeof(struct netdev_desc),
1729 ioaddr + TxRingPtr);
1731 /* Initialize other registers.
1732 * Configure the PCI bus bursts and FIFO thresholds.
1733 * Configure for standard, in-spec Ethernet.
1734 * Start with half-duplex. check_link will update
1735 * to the correct settings.
1738 /* DRTH: 2: start tx if 64 bytes are in the fifo
1739 * FLTH: 0x10: refill with next packet if 512 bytes are free
1740 * MXDMA: 0: up to 256 byte bursts.
1741 * MXDMA must be <= FLTH
1745 np->tx_config = TxAutoPad | TxCollRetry | TxMxdma_256 |
1746 TX_FLTH_VAL | TX_DRTH_VAL_START;
1747 writel(np->tx_config, ioaddr + TxConfig);
1749 /* DRTH 0x10: start copying to memory if 128 bytes are in the fifo
1750 * MXDMA 0: up to 256 byte bursts
1752 np->rx_config = RxMxdma_256 | RX_DRTH_VAL;
1753 /* if receive ring now has bigger buffers than normal, enable jumbo */
1754 if (np->rx_buf_sz > NATSEMI_LONGPKT)
1755 np->rx_config |= RxAcceptLong;
1757 writel(np->rx_config, ioaddr + RxConfig);
1760 * The PME bit is initialized from the EEPROM contents.
1761 * PCI cards probably have PME disabled, but motherboard
1762 * implementations may have PME set to enable WakeOnLan.
1763 * With PME set the chip will scan incoming packets but
1764 * nothing will be written to memory. */
1765 np->SavedClkRun = readl(ioaddr + ClkRun);
1766 writel(np->SavedClkRun & ~PMEEnable, ioaddr + ClkRun);
1767 if (np->SavedClkRun & PMEStatus && netif_msg_wol(np)) {
1768 printk(KERN_NOTICE "%s: Wake-up event %#08x\n",
1769 dev->name, readl(ioaddr + WOLCmd));
1775 /* Enable interrupts by setting the interrupt mask. */
1776 writel(DEFAULT_INTR, ioaddr + IntrMask);
1777 natsemi_irq_enable(dev);
1779 writel(RxOn | TxOn, ioaddr + ChipCmd);
1780 writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
1786 * 1) check for link changes. Usually they are handled by the MII interrupt
1787 * but it doesn't hurt to check twice.
1788 * 2) check for sudden death of the NIC:
1789 * It seems that a reference set for this chip went out with incorrect info,
1790 * and there exist boards that aren't quite right. An unexpected voltage
1791 * drop can cause the PHY to get itself in a weird state (basically reset).
1792 * NOTE: this only seems to affect revC chips. The user can disable
1793 * this check via dspcfg_workaround sysfs option.
1794 * 3) check of death of the RX path due to OOM
1796 static void netdev_timer(unsigned long data)
1798 struct net_device *dev = (struct net_device *)data;
1799 struct netdev_private *np = netdev_priv(dev);
1800 void __iomem * ioaddr = ns_ioaddr(dev);
1801 int next_tick = NATSEMI_TIMER_FREQ;
1803 if (netif_msg_timer(np)) {
1804 /* DO NOT read the IntrStatus register,
1805 * a read clears any pending interrupts.
1807 printk(KERN_DEBUG "%s: Media selection timer tick.\n",
1811 if (dev->if_port == PORT_TP) {
1814 spin_lock_irq(&np->lock);
1815 /* check for a nasty random phy-reset - use dspcfg as a flag */
1816 writew(1, ioaddr+PGSEL);
1817 dspcfg = readw(ioaddr+DSPCFG);
1818 writew(0, ioaddr+PGSEL);
1819 if (np->dspcfg_workaround && dspcfg != np->dspcfg) {
1820 if (!netif_queue_stopped(dev)) {
1821 spin_unlock_irq(&np->lock);
1822 if (netif_msg_drv(np))
1823 printk(KERN_NOTICE "%s: possible phy reset: "
1824 "re-initializing\n", dev->name);
1825 disable_irq(dev->irq);
1826 spin_lock_irq(&np->lock);
1827 natsemi_stop_rxtx(dev);
1830 init_registers(dev);
1831 spin_unlock_irq(&np->lock);
1832 enable_irq(dev->irq);
1836 spin_unlock_irq(&np->lock);
1839 /* init_registers() calls check_link() for the above case */
1841 spin_unlock_irq(&np->lock);
1844 spin_lock_irq(&np->lock);
1846 spin_unlock_irq(&np->lock);
1849 disable_irq(dev->irq);
1852 enable_irq(dev->irq);
1854 writel(RxOn, ioaddr + ChipCmd);
1861 mod_timer(&np->timer, round_jiffies(jiffies + next_tick));
1863 mod_timer(&np->timer, jiffies + next_tick);
1866 static void dump_ring(struct net_device *dev)
1868 struct netdev_private *np = netdev_priv(dev);
1870 if (netif_msg_pktdata(np)) {
1872 printk(KERN_DEBUG " Tx ring at %p:\n", np->tx_ring);
1873 for (i = 0; i < TX_RING_SIZE; i++) {
1874 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1875 i, np->tx_ring[i].next_desc,
1876 np->tx_ring[i].cmd_status,
1877 np->tx_ring[i].addr);
1879 printk(KERN_DEBUG " Rx ring %p:\n", np->rx_ring);
1880 for (i = 0; i < RX_RING_SIZE; i++) {
1881 printk(KERN_DEBUG " #%d desc. %#08x %#08x %#08x.\n",
1882 i, np->rx_ring[i].next_desc,
1883 np->rx_ring[i].cmd_status,
1884 np->rx_ring[i].addr);
1889 static void tx_timeout(struct net_device *dev)
1891 struct netdev_private *np = netdev_priv(dev);
1892 void __iomem * ioaddr = ns_ioaddr(dev);
1894 disable_irq(dev->irq);
1895 spin_lock_irq(&np->lock);
1896 if (!np->hands_off) {
1897 if (netif_msg_tx_err(np))
1899 "%s: Transmit timed out, status %#08x,"
1901 dev->name, readl(ioaddr + IntrStatus));
1906 init_registers(dev);
1909 "%s: tx_timeout while in hands_off state?\n",
1912 spin_unlock_irq(&np->lock);
1913 enable_irq(dev->irq);
1915 dev->trans_start = jiffies;
1916 np->stats.tx_errors++;
1917 netif_wake_queue(dev);
1920 static int alloc_ring(struct net_device *dev)
1922 struct netdev_private *np = netdev_priv(dev);
1923 np->rx_ring = pci_alloc_consistent(np->pci_dev,
1924 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
1928 np->tx_ring = &np->rx_ring[RX_RING_SIZE];
1932 static void refill_rx(struct net_device *dev)
1934 struct netdev_private *np = netdev_priv(dev);
1936 /* Refill the Rx ring buffers. */
1937 for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1938 struct sk_buff *skb;
1939 int entry = np->dirty_rx % RX_RING_SIZE;
1940 if (np->rx_skbuff[entry] == NULL) {
1941 unsigned int buflen = np->rx_buf_sz+NATSEMI_PADDING;
1942 skb = dev_alloc_skb(buflen);
1943 np->rx_skbuff[entry] = skb;
1945 break; /* Better luck next round. */
1946 skb->dev = dev; /* Mark as being used by this device. */
1947 np->rx_dma[entry] = pci_map_single(np->pci_dev,
1948 skb->data, buflen, PCI_DMA_FROMDEVICE);
1949 np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
1951 np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz);
1953 if (np->cur_rx - np->dirty_rx == RX_RING_SIZE) {
1954 if (netif_msg_rx_err(np))
1955 printk(KERN_WARNING "%s: going OOM.\n", dev->name);
1960 static void set_bufsize(struct net_device *dev)
1962 struct netdev_private *np = netdev_priv(dev);
1963 if (dev->mtu <= ETH_DATA_LEN)
1964 np->rx_buf_sz = ETH_DATA_LEN + NATSEMI_HEADERS;
1966 np->rx_buf_sz = dev->mtu + NATSEMI_HEADERS;
1969 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
1970 static void init_ring(struct net_device *dev)
1972 struct netdev_private *np = netdev_priv(dev);
1976 np->dirty_tx = np->cur_tx = 0;
1977 for (i = 0; i < TX_RING_SIZE; i++) {
1978 np->tx_skbuff[i] = NULL;
1979 np->tx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1980 +sizeof(struct netdev_desc)
1981 *((i+1)%TX_RING_SIZE+RX_RING_SIZE));
1982 np->tx_ring[i].cmd_status = 0;
1987 np->cur_rx = RX_RING_SIZE;
1991 np->rx_head_desc = &np->rx_ring[0];
1993 /* Please be carefull before changing this loop - at least gcc-2.95.1
1994 * miscompiles it otherwise.
1996 /* Initialize all Rx descriptors. */
1997 for (i = 0; i < RX_RING_SIZE; i++) {
1998 np->rx_ring[i].next_desc = cpu_to_le32(np->ring_dma
1999 +sizeof(struct netdev_desc)
2000 *((i+1)%RX_RING_SIZE));
2001 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
2002 np->rx_skbuff[i] = NULL;
2008 static void drain_tx(struct net_device *dev)
2010 struct netdev_private *np = netdev_priv(dev);
2013 for (i = 0; i < TX_RING_SIZE; i++) {
2014 if (np->tx_skbuff[i]) {
2015 pci_unmap_single(np->pci_dev,
2016 np->tx_dma[i], np->tx_skbuff[i]->len,
2018 dev_kfree_skb(np->tx_skbuff[i]);
2019 np->stats.tx_dropped++;
2021 np->tx_skbuff[i] = NULL;
2025 static void drain_rx(struct net_device *dev)
2027 struct netdev_private *np = netdev_priv(dev);
2028 unsigned int buflen = np->rx_buf_sz;
2031 /* Free all the skbuffs in the Rx queue. */
2032 for (i = 0; i < RX_RING_SIZE; i++) {
2033 np->rx_ring[i].cmd_status = 0;
2034 np->rx_ring[i].addr = 0xBADF00D0; /* An invalid address. */
2035 if (np->rx_skbuff[i]) {
2036 pci_unmap_single(np->pci_dev,
2037 np->rx_dma[i], buflen,
2038 PCI_DMA_FROMDEVICE);
2039 dev_kfree_skb(np->rx_skbuff[i]);
2041 np->rx_skbuff[i] = NULL;
2045 static void drain_ring(struct net_device *dev)
2051 static void free_ring(struct net_device *dev)
2053 struct netdev_private *np = netdev_priv(dev);
2054 pci_free_consistent(np->pci_dev,
2055 sizeof(struct netdev_desc) * (RX_RING_SIZE+TX_RING_SIZE),
2056 np->rx_ring, np->ring_dma);
2059 static void reinit_rx(struct net_device *dev)
2061 struct netdev_private *np = netdev_priv(dev);
2066 np->cur_rx = RX_RING_SIZE;
2067 np->rx_head_desc = &np->rx_ring[0];
2068 /* Initialize all Rx descriptors. */
2069 for (i = 0; i < RX_RING_SIZE; i++)
2070 np->rx_ring[i].cmd_status = cpu_to_le32(DescOwn);
2075 static void reinit_ring(struct net_device *dev)
2077 struct netdev_private *np = netdev_priv(dev);
2082 np->dirty_tx = np->cur_tx = 0;
2083 for (i=0;i<TX_RING_SIZE;i++)
2084 np->tx_ring[i].cmd_status = 0;
2089 static int start_tx(struct sk_buff *skb, struct net_device *dev)
2091 struct netdev_private *np = netdev_priv(dev);
2092 void __iomem * ioaddr = ns_ioaddr(dev);
2094 unsigned long flags;
2096 /* Note: Ordering is important here, set the field with the
2097 "ownership" bit last, and only then increment cur_tx. */
2099 /* Calculate the next Tx descriptor entry. */
2100 entry = np->cur_tx % TX_RING_SIZE;
2102 np->tx_skbuff[entry] = skb;
2103 np->tx_dma[entry] = pci_map_single(np->pci_dev,
2104 skb->data,skb->len, PCI_DMA_TODEVICE);
2106 np->tx_ring[entry].addr = cpu_to_le32(np->tx_dma[entry]);
2108 spin_lock_irqsave(&np->lock, flags);
2110 if (!np->hands_off) {
2111 np->tx_ring[entry].cmd_status = cpu_to_le32(DescOwn | skb->len);
2112 /* StrongARM: Explicitly cache flush np->tx_ring and
2113 * skb->data,skb->len. */
2116 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
2117 netdev_tx_done(dev);
2118 if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1)
2119 netif_stop_queue(dev);
2121 /* Wake the potentially-idle transmit channel. */
2122 writel(TxOn, ioaddr + ChipCmd);
2124 dev_kfree_skb_irq(skb);
2125 np->stats.tx_dropped++;
2127 spin_unlock_irqrestore(&np->lock, flags);
2129 dev->trans_start = jiffies;
2131 if (netif_msg_tx_queued(np)) {
2132 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
2133 dev->name, np->cur_tx, entry);
2138 static void netdev_tx_done(struct net_device *dev)
2140 struct netdev_private *np = netdev_priv(dev);
2142 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
2143 int entry = np->dirty_tx % TX_RING_SIZE;
2144 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescOwn))
2146 if (netif_msg_tx_done(np))
2148 "%s: tx frame #%d finished, status %#08x.\n",
2149 dev->name, np->dirty_tx,
2150 le32_to_cpu(np->tx_ring[entry].cmd_status));
2151 if (np->tx_ring[entry].cmd_status & cpu_to_le32(DescPktOK)) {
2152 np->stats.tx_packets++;
2153 np->stats.tx_bytes += np->tx_skbuff[entry]->len;
2154 } else { /* Various Tx errors */
2156 le32_to_cpu(np->tx_ring[entry].cmd_status);
2157 if (tx_status & (DescTxAbort|DescTxExcColl))
2158 np->stats.tx_aborted_errors++;
2159 if (tx_status & DescTxFIFO)
2160 np->stats.tx_fifo_errors++;
2161 if (tx_status & DescTxCarrier)
2162 np->stats.tx_carrier_errors++;
2163 if (tx_status & DescTxOOWCol)
2164 np->stats.tx_window_errors++;
2165 np->stats.tx_errors++;
2167 pci_unmap_single(np->pci_dev,np->tx_dma[entry],
2168 np->tx_skbuff[entry]->len,
2170 /* Free the original skb. */
2171 dev_kfree_skb_irq(np->tx_skbuff[entry]);
2172 np->tx_skbuff[entry] = NULL;
2174 if (netif_queue_stopped(dev)
2175 && np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
2176 /* The ring is no longer full, wake queue. */
2177 netif_wake_queue(dev);
2181 /* The interrupt handler doesn't actually handle interrupts itself, it
2182 * schedules a NAPI poll if there is anything to do. */
2183 static irqreturn_t intr_handler(int irq, void *dev_instance)
2185 struct net_device *dev = dev_instance;
2186 struct netdev_private *np = netdev_priv(dev);
2187 void __iomem * ioaddr = ns_ioaddr(dev);
2189 /* Reading IntrStatus automatically acknowledges so don't do
2190 * that while interrupts are disabled, (for example, while a
2191 * poll is scheduled). */
2192 if (np->hands_off || !readl(ioaddr + IntrEnable))
2195 np->intr_status = readl(ioaddr + IntrStatus);
2197 if (!np->intr_status)
2200 if (netif_msg_intr(np))
2202 "%s: Interrupt, status %#08x, mask %#08x.\n",
2203 dev->name, np->intr_status,
2204 readl(ioaddr + IntrMask));
2206 prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]);
2208 if (netif_rx_schedule_prep(dev, &np->napi)) {
2209 /* Disable interrupts and register for poll */
2210 natsemi_irq_disable(dev);
2211 __netif_rx_schedule(dev, &np->napi);
2214 "%s: Ignoring interrupt, status %#08x, mask %#08x.\n",
2215 dev->name, np->intr_status,
2216 readl(ioaddr + IntrMask));
2221 /* This is the NAPI poll routine. As well as the standard RX handling
2222 * it also handles all other interrupts that the chip might raise.
2224 static int natsemi_poll(struct napi_struct *napi, int budget)
2226 struct netdev_private *np = container_of(napi, struct netdev_private, napi);
2227 struct net_device *dev = np->dev;
2228 void __iomem * ioaddr = ns_ioaddr(dev);
2232 if (netif_msg_intr(np))
2234 "%s: Poll, status %#08x, mask %#08x.\n",
2235 dev->name, np->intr_status,
2236 readl(ioaddr + IntrMask));
2238 /* netdev_rx() may read IntrStatus again if the RX state
2239 * machine falls over so do it first. */
2240 if (np->intr_status &
2241 (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
2242 IntrRxErr | IntrRxOverrun)) {
2243 netdev_rx(dev, &work_done, budget);
2246 if (np->intr_status &
2247 (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) {
2248 spin_lock(&np->lock);
2249 netdev_tx_done(dev);
2250 spin_unlock(&np->lock);
2253 /* Abnormal error summary/uncommon events handlers. */
2254 if (np->intr_status & IntrAbnormalSummary)
2255 netdev_error(dev, np->intr_status);
2257 if (work_done >= budget)
2260 np->intr_status = readl(ioaddr + IntrStatus);
2261 } while (np->intr_status);
2263 netif_rx_complete(dev, napi);
2265 /* Reenable interrupts providing nothing is trying to shut
2267 spin_lock(&np->lock);
2268 if (!np->hands_off && netif_running(dev))
2269 natsemi_irq_enable(dev);
2270 spin_unlock(&np->lock);
2275 /* This routine is logically part of the interrupt handler, but separated
2276 for clarity and better register allocation. */
2277 static void netdev_rx(struct net_device *dev, int *work_done, int work_to_do)
2279 struct netdev_private *np = netdev_priv(dev);
2280 int entry = np->cur_rx % RX_RING_SIZE;
2281 int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
2282 s32 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2283 unsigned int buflen = np->rx_buf_sz;
2284 void __iomem * ioaddr = ns_ioaddr(dev);
2286 /* If the driver owns the next entry it's a new packet. Send it up. */
2287 while (desc_status < 0) { /* e.g. & DescOwn */
2289 if (netif_msg_rx_status(np))
2291 " netdev_rx() entry %d status was %#08x.\n",
2292 entry, desc_status);
2296 if (*work_done >= work_to_do)
2301 pkt_len = (desc_status & DescSizeMask) - 4;
2302 if ((desc_status&(DescMore|DescPktOK|DescRxLong)) != DescPktOK){
2303 if (desc_status & DescMore) {
2304 unsigned long flags;
2306 if (netif_msg_rx_err(np))
2308 "%s: Oversized(?) Ethernet "
2309 "frame spanned multiple "
2310 "buffers, entry %#08x "
2311 "status %#08x.\n", dev->name,
2312 np->cur_rx, desc_status);
2313 np->stats.rx_length_errors++;
2315 /* The RX state machine has probably
2316 * locked up beneath us. Follow the
2317 * reset procedure documented in
2320 spin_lock_irqsave(&np->lock, flags);
2323 writel(np->ring_dma, ioaddr + RxRingPtr);
2325 spin_unlock_irqrestore(&np->lock, flags);
2327 /* We'll enable RX on exit from this
2332 /* There was an error. */
2333 np->stats.rx_errors++;
2334 if (desc_status & (DescRxAbort|DescRxOver))
2335 np->stats.rx_over_errors++;
2336 if (desc_status & (DescRxLong|DescRxRunt))
2337 np->stats.rx_length_errors++;
2338 if (desc_status & (DescRxInvalid|DescRxAlign))
2339 np->stats.rx_frame_errors++;
2340 if (desc_status & DescRxCRC)
2341 np->stats.rx_crc_errors++;
2343 } else if (pkt_len > np->rx_buf_sz) {
2344 /* if this is the tail of a double buffer
2345 * packet, we've already counted the error
2346 * on the first part. Ignore the second half.
2349 struct sk_buff *skb;
2350 /* Omit CRC size. */
2351 /* Check if the packet is long enough to accept
2352 * without copying to a minimally-sized skbuff. */
2353 if (pkt_len < rx_copybreak
2354 && (skb = dev_alloc_skb(pkt_len + RX_OFFSET)) != NULL) {
2355 /* 16 byte align the IP header */
2356 skb_reserve(skb, RX_OFFSET);
2357 pci_dma_sync_single_for_cpu(np->pci_dev,
2360 PCI_DMA_FROMDEVICE);
2361 skb_copy_to_linear_data(skb,
2362 np->rx_skbuff[entry]->data, pkt_len);
2363 skb_put(skb, pkt_len);
2364 pci_dma_sync_single_for_device(np->pci_dev,
2367 PCI_DMA_FROMDEVICE);
2369 pci_unmap_single(np->pci_dev, np->rx_dma[entry],
2370 buflen, PCI_DMA_FROMDEVICE);
2371 skb_put(skb = np->rx_skbuff[entry], pkt_len);
2372 np->rx_skbuff[entry] = NULL;
2374 skb->protocol = eth_type_trans(skb, dev);
2375 netif_receive_skb(skb);
2376 dev->last_rx = jiffies;
2377 np->stats.rx_packets++;
2378 np->stats.rx_bytes += pkt_len;
2380 entry = (++np->cur_rx) % RX_RING_SIZE;
2381 np->rx_head_desc = &np->rx_ring[entry];
2382 desc_status = le32_to_cpu(np->rx_head_desc->cmd_status);
2386 /* Restart Rx engine if stopped. */
2388 mod_timer(&np->timer, jiffies + 1);
2390 writel(RxOn, ioaddr + ChipCmd);
2393 static void netdev_error(struct net_device *dev, int intr_status)
2395 struct netdev_private *np = netdev_priv(dev);
2396 void __iomem * ioaddr = ns_ioaddr(dev);
2398 spin_lock(&np->lock);
2399 if (intr_status & LinkChange) {
2400 u16 lpa = mdio_read(dev, MII_LPA);
2401 if (mdio_read(dev, MII_BMCR) & BMCR_ANENABLE
2402 && netif_msg_link(np)) {
2404 "%s: Autonegotiation advertising"
2405 " %#04x partner %#04x.\n", dev->name,
2406 np->advertising, lpa);
2409 /* read MII int status to clear the flag */
2410 readw(ioaddr + MIntrStatus);
2413 if (intr_status & StatsMax) {
2416 if (intr_status & IntrTxUnderrun) {
2417 if ((np->tx_config & TxDrthMask) < TX_DRTH_VAL_LIMIT) {
2418 np->tx_config += TX_DRTH_VAL_INC;
2419 if (netif_msg_tx_err(np))
2421 "%s: increased tx threshold, txcfg %#08x.\n",
2422 dev->name, np->tx_config);
2424 if (netif_msg_tx_err(np))
2426 "%s: tx underrun with maximum tx threshold, txcfg %#08x.\n",
2427 dev->name, np->tx_config);
2429 writel(np->tx_config, ioaddr + TxConfig);
2431 if (intr_status & WOLPkt && netif_msg_wol(np)) {
2432 int wol_status = readl(ioaddr + WOLCmd);
2433 printk(KERN_NOTICE "%s: Link wake-up event %#08x\n",
2434 dev->name, wol_status);
2436 if (intr_status & RxStatusFIFOOver) {
2437 if (netif_msg_rx_err(np) && netif_msg_intr(np)) {
2438 printk(KERN_NOTICE "%s: Rx status FIFO overrun\n",
2441 np->stats.rx_fifo_errors++;
2442 np->stats.rx_errors++;
2444 /* Hmmmmm, it's not clear how to recover from PCI faults. */
2445 if (intr_status & IntrPCIErr) {
2446 printk(KERN_NOTICE "%s: PCI error %#08x\n", dev->name,
2447 intr_status & IntrPCIErr);
2448 np->stats.tx_fifo_errors++;
2449 np->stats.tx_errors++;
2450 np->stats.rx_fifo_errors++;
2451 np->stats.rx_errors++;
2453 spin_unlock(&np->lock);
2456 static void __get_stats(struct net_device *dev)
2458 void __iomem * ioaddr = ns_ioaddr(dev);
2459 struct netdev_private *np = netdev_priv(dev);
2461 /* The chip only need report frame silently dropped. */
2462 np->stats.rx_crc_errors += readl(ioaddr + RxCRCErrs);
2463 np->stats.rx_missed_errors += readl(ioaddr + RxMissed);
2466 static struct net_device_stats *get_stats(struct net_device *dev)
2468 struct netdev_private *np = netdev_priv(dev);
2470 /* The chip only need report frame silently dropped. */
2471 spin_lock_irq(&np->lock);
2472 if (netif_running(dev) && !np->hands_off)
2474 spin_unlock_irq(&np->lock);
2479 #ifdef CONFIG_NET_POLL_CONTROLLER
2480 static void natsemi_poll_controller(struct net_device *dev)
2482 disable_irq(dev->irq);
2483 intr_handler(dev->irq, dev);
2484 enable_irq(dev->irq);
2488 #define HASH_TABLE 0x200
2489 static void __set_rx_mode(struct net_device *dev)
2491 void __iomem * ioaddr = ns_ioaddr(dev);
2492 struct netdev_private *np = netdev_priv(dev);
2493 u8 mc_filter[64]; /* Multicast hash filter */
2496 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
2497 rx_mode = RxFilterEnable | AcceptBroadcast
2498 | AcceptAllMulticast | AcceptAllPhys | AcceptMyPhys;
2499 } else if ((dev->mc_count > multicast_filter_limit)
2500 || (dev->flags & IFF_ALLMULTI)) {
2501 rx_mode = RxFilterEnable | AcceptBroadcast
2502 | AcceptAllMulticast | AcceptMyPhys;
2504 struct dev_mc_list *mclist;
2506 memset(mc_filter, 0, sizeof(mc_filter));
2507 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
2508 i++, mclist = mclist->next) {
2509 int b = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 23) & 0x1ff;
2510 mc_filter[b/8] |= (1 << (b & 0x07));
2512 rx_mode = RxFilterEnable | AcceptBroadcast
2513 | AcceptMulticast | AcceptMyPhys;
2514 for (i = 0; i < 64; i += 2) {
2515 writel(HASH_TABLE + i, ioaddr + RxFilterAddr);
2516 writel((mc_filter[i + 1] << 8) + mc_filter[i],
2517 ioaddr + RxFilterData);
2520 writel(rx_mode, ioaddr + RxFilterAddr);
2521 np->cur_rx_mode = rx_mode;
2524 static int natsemi_change_mtu(struct net_device *dev, int new_mtu)
2526 if (new_mtu < 64 || new_mtu > NATSEMI_RX_LIMIT-NATSEMI_HEADERS)
2531 /* synchronized against open : rtnl_lock() held by caller */
2532 if (netif_running(dev)) {
2533 struct netdev_private *np = netdev_priv(dev);
2534 void __iomem * ioaddr = ns_ioaddr(dev);
2536 disable_irq(dev->irq);
2537 spin_lock(&np->lock);
2539 natsemi_stop_rxtx(dev);
2540 /* drain rx queue */
2542 /* change buffers */
2545 writel(np->ring_dma, ioaddr + RxRingPtr);
2546 /* restart engines */
2547 writel(RxOn | TxOn, ioaddr + ChipCmd);
2548 spin_unlock(&np->lock);
2549 enable_irq(dev->irq);
2554 static void set_rx_mode(struct net_device *dev)
2556 struct netdev_private *np = netdev_priv(dev);
2557 spin_lock_irq(&np->lock);
2560 spin_unlock_irq(&np->lock);
2563 static void get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
2565 struct netdev_private *np = netdev_priv(dev);
2566 strncpy(info->driver, DRV_NAME, ETHTOOL_BUSINFO_LEN);
2567 strncpy(info->version, DRV_VERSION, ETHTOOL_BUSINFO_LEN);
2568 strncpy(info->bus_info, pci_name(np->pci_dev), ETHTOOL_BUSINFO_LEN);
2571 static int get_regs_len(struct net_device *dev)
2573 return NATSEMI_REGS_SIZE;
2576 static int get_eeprom_len(struct net_device *dev)
2578 struct netdev_private *np = netdev_priv(dev);
2579 return np->eeprom_size;
2582 static int get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2584 struct netdev_private *np = netdev_priv(dev);
2585 spin_lock_irq(&np->lock);
2586 netdev_get_ecmd(dev, ecmd);
2587 spin_unlock_irq(&np->lock);
2591 static int set_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
2593 struct netdev_private *np = netdev_priv(dev);
2595 spin_lock_irq(&np->lock);
2596 res = netdev_set_ecmd(dev, ecmd);
2597 spin_unlock_irq(&np->lock);
2601 static void get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2603 struct netdev_private *np = netdev_priv(dev);
2604 spin_lock_irq(&np->lock);
2605 netdev_get_wol(dev, &wol->supported, &wol->wolopts);
2606 netdev_get_sopass(dev, wol->sopass);
2607 spin_unlock_irq(&np->lock);
2610 static int set_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
2612 struct netdev_private *np = netdev_priv(dev);
2614 spin_lock_irq(&np->lock);
2615 netdev_set_wol(dev, wol->wolopts);
2616 res = netdev_set_sopass(dev, wol->sopass);
2617 spin_unlock_irq(&np->lock);
2621 static void get_regs(struct net_device *dev, struct ethtool_regs *regs, void *buf)
2623 struct netdev_private *np = netdev_priv(dev);
2624 regs->version = NATSEMI_REGS_VER;
2625 spin_lock_irq(&np->lock);
2626 netdev_get_regs(dev, buf);
2627 spin_unlock_irq(&np->lock);
2630 static u32 get_msglevel(struct net_device *dev)
2632 struct netdev_private *np = netdev_priv(dev);
2633 return np->msg_enable;
2636 static void set_msglevel(struct net_device *dev, u32 val)
2638 struct netdev_private *np = netdev_priv(dev);
2639 np->msg_enable = val;
2642 static int nway_reset(struct net_device *dev)
2646 /* if autoneg is off, it's an error */
2647 tmp = mdio_read(dev, MII_BMCR);
2648 if (tmp & BMCR_ANENABLE) {
2649 tmp |= (BMCR_ANRESTART);
2650 mdio_write(dev, MII_BMCR, tmp);
2656 static u32 get_link(struct net_device *dev)
2658 /* LSTATUS is latched low until a read - so read twice */
2659 mdio_read(dev, MII_BMSR);
2660 return (mdio_read(dev, MII_BMSR)&BMSR_LSTATUS) ? 1:0;
2663 static int get_eeprom(struct net_device *dev, struct ethtool_eeprom *eeprom, u8 *data)
2665 struct netdev_private *np = netdev_priv(dev);
2669 eebuf = kmalloc(np->eeprom_size, GFP_KERNEL);
2673 eeprom->magic = PCI_VENDOR_ID_NS | (PCI_DEVICE_ID_NS_83815<<16);
2674 spin_lock_irq(&np->lock);
2675 res = netdev_get_eeprom(dev, eebuf);
2676 spin_unlock_irq(&np->lock);
2678 memcpy(data, eebuf+eeprom->offset, eeprom->len);
2683 static const struct ethtool_ops ethtool_ops = {
2684 .get_drvinfo = get_drvinfo,
2685 .get_regs_len = get_regs_len,
2686 .get_eeprom_len = get_eeprom_len,
2687 .get_settings = get_settings,
2688 .set_settings = set_settings,
2691 .get_regs = get_regs,
2692 .get_msglevel = get_msglevel,
2693 .set_msglevel = set_msglevel,
2694 .nway_reset = nway_reset,
2695 .get_link = get_link,
2696 .get_eeprom = get_eeprom,
2699 static int netdev_set_wol(struct net_device *dev, u32 newval)
2701 struct netdev_private *np = netdev_priv(dev);
2702 void __iomem * ioaddr = ns_ioaddr(dev);
2703 u32 data = readl(ioaddr + WOLCmd) & ~WakeOptsSummary;
2705 /* translate to bitmasks this chip understands */
2706 if (newval & WAKE_PHY)
2708 if (newval & WAKE_UCAST)
2709 data |= WakeUnicast;
2710 if (newval & WAKE_MCAST)
2711 data |= WakeMulticast;
2712 if (newval & WAKE_BCAST)
2713 data |= WakeBroadcast;
2714 if (newval & WAKE_ARP)
2716 if (newval & WAKE_MAGIC)
2718 if (np->srr >= SRR_DP83815_D) {
2719 if (newval & WAKE_MAGICSECURE) {
2720 data |= WakeMagicSecure;
2724 writel(data, ioaddr + WOLCmd);
2729 static int netdev_get_wol(struct net_device *dev, u32 *supported, u32 *cur)
2731 struct netdev_private *np = netdev_priv(dev);
2732 void __iomem * ioaddr = ns_ioaddr(dev);
2733 u32 regval = readl(ioaddr + WOLCmd);
2735 *supported = (WAKE_PHY | WAKE_UCAST | WAKE_MCAST | WAKE_BCAST
2736 | WAKE_ARP | WAKE_MAGIC);
2738 if (np->srr >= SRR_DP83815_D) {
2739 /* SOPASS works on revD and higher */
2740 *supported |= WAKE_MAGICSECURE;
2744 /* translate from chip bitmasks */
2745 if (regval & WakePhy)
2747 if (regval & WakeUnicast)
2749 if (regval & WakeMulticast)
2751 if (regval & WakeBroadcast)
2753 if (regval & WakeArp)
2755 if (regval & WakeMagic)
2757 if (regval & WakeMagicSecure) {
2758 /* this can be on in revC, but it's broken */
2759 *cur |= WAKE_MAGICSECURE;
2765 static int netdev_set_sopass(struct net_device *dev, u8 *newval)
2767 struct netdev_private *np = netdev_priv(dev);
2768 void __iomem * ioaddr = ns_ioaddr(dev);
2769 u16 *sval = (u16 *)newval;
2772 if (np->srr < SRR_DP83815_D) {
2776 /* enable writing to these registers by disabling the RX filter */
2777 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2778 addr &= ~RxFilterEnable;
2779 writel(addr, ioaddr + RxFilterAddr);
2781 /* write the three words to (undocumented) RFCR vals 0xa, 0xc, 0xe */
2782 writel(addr | 0xa, ioaddr + RxFilterAddr);
2783 writew(sval[0], ioaddr + RxFilterData);
2785 writel(addr | 0xc, ioaddr + RxFilterAddr);
2786 writew(sval[1], ioaddr + RxFilterData);
2788 writel(addr | 0xe, ioaddr + RxFilterAddr);
2789 writew(sval[2], ioaddr + RxFilterData);
2791 /* re-enable the RX filter */
2792 writel(addr | RxFilterEnable, ioaddr + RxFilterAddr);
2797 static int netdev_get_sopass(struct net_device *dev, u8 *data)
2799 struct netdev_private *np = netdev_priv(dev);
2800 void __iomem * ioaddr = ns_ioaddr(dev);
2801 u16 *sval = (u16 *)data;
2804 if (np->srr < SRR_DP83815_D) {
2805 sval[0] = sval[1] = sval[2] = 0;
2809 /* read the three words from (undocumented) RFCR vals 0xa, 0xc, 0xe */
2810 addr = readl(ioaddr + RxFilterAddr) & ~RFCRAddressMask;
2812 writel(addr | 0xa, ioaddr + RxFilterAddr);
2813 sval[0] = readw(ioaddr + RxFilterData);
2815 writel(addr | 0xc, ioaddr + RxFilterAddr);
2816 sval[1] = readw(ioaddr + RxFilterData);
2818 writel(addr | 0xe, ioaddr + RxFilterAddr);
2819 sval[2] = readw(ioaddr + RxFilterData);
2821 writel(addr, ioaddr + RxFilterAddr);
2826 static int netdev_get_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2828 struct netdev_private *np = netdev_priv(dev);
2831 ecmd->port = dev->if_port;
2832 ecmd->speed = np->speed;
2833 ecmd->duplex = np->duplex;
2834 ecmd->autoneg = np->autoneg;
2835 ecmd->advertising = 0;
2836 if (np->advertising & ADVERTISE_10HALF)
2837 ecmd->advertising |= ADVERTISED_10baseT_Half;
2838 if (np->advertising & ADVERTISE_10FULL)
2839 ecmd->advertising |= ADVERTISED_10baseT_Full;
2840 if (np->advertising & ADVERTISE_100HALF)
2841 ecmd->advertising |= ADVERTISED_100baseT_Half;
2842 if (np->advertising & ADVERTISE_100FULL)
2843 ecmd->advertising |= ADVERTISED_100baseT_Full;
2844 ecmd->supported = (SUPPORTED_Autoneg |
2845 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
2846 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
2847 SUPPORTED_TP | SUPPORTED_MII | SUPPORTED_FIBRE);
2848 ecmd->phy_address = np->phy_addr_external;
2850 * We intentionally report the phy address of the external
2851 * phy, even if the internal phy is used. This is necessary
2852 * to work around a deficiency of the ethtool interface:
2853 * It's only possible to query the settings of the active
2855 * # ethtool -s ethX port mii
2856 * actually sends an ioctl to switch to port mii with the
2857 * settings that are used for the current active port.
2858 * If we would report a different phy address in this
2860 * # ethtool -s ethX port tp;ethtool -s ethX port mii
2861 * would unintentionally change the phy address.
2863 * Fortunately the phy address doesn't matter with the
2867 /* set information based on active port type */
2868 switch (ecmd->port) {
2871 ecmd->advertising |= ADVERTISED_TP;
2872 ecmd->transceiver = XCVR_INTERNAL;
2875 ecmd->advertising |= ADVERTISED_MII;
2876 ecmd->transceiver = XCVR_EXTERNAL;
2879 ecmd->advertising |= ADVERTISED_FIBRE;
2880 ecmd->transceiver = XCVR_EXTERNAL;
2884 /* if autonegotiation is on, try to return the active speed/duplex */
2885 if (ecmd->autoneg == AUTONEG_ENABLE) {
2886 ecmd->advertising |= ADVERTISED_Autoneg;
2887 tmp = mii_nway_result(
2888 np->advertising & mdio_read(dev, MII_LPA));
2889 if (tmp == LPA_100FULL || tmp == LPA_100HALF)
2890 ecmd->speed = SPEED_100;
2892 ecmd->speed = SPEED_10;
2893 if (tmp == LPA_100FULL || tmp == LPA_10FULL)
2894 ecmd->duplex = DUPLEX_FULL;
2896 ecmd->duplex = DUPLEX_HALF;
2899 /* ignore maxtxpkt, maxrxpkt for now */
2904 static int netdev_set_ecmd(struct net_device *dev, struct ethtool_cmd *ecmd)
2906 struct netdev_private *np = netdev_priv(dev);
2908 if (ecmd->port != PORT_TP && ecmd->port != PORT_MII && ecmd->port != PORT_FIBRE)
2910 if (ecmd->transceiver != XCVR_INTERNAL && ecmd->transceiver != XCVR_EXTERNAL)
2912 if (ecmd->autoneg == AUTONEG_ENABLE) {
2913 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
2914 ADVERTISED_10baseT_Full |
2915 ADVERTISED_100baseT_Half |
2916 ADVERTISED_100baseT_Full)) == 0) {
2919 } else if (ecmd->autoneg == AUTONEG_DISABLE) {
2920 if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100)
2922 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
2929 * If we're ignoring the PHY then autoneg and the internal
2930 * transciever are really not going to work so don't let the
2933 if (np->ignore_phy && (ecmd->autoneg == AUTONEG_ENABLE ||
2934 ecmd->port == PORT_TP))
2938 * maxtxpkt, maxrxpkt: ignored for now.
2941 * PORT_TP is always XCVR_INTERNAL, PORT_MII and PORT_FIBRE are always
2942 * XCVR_EXTERNAL. The implementation thus ignores ecmd->transceiver and
2943 * selects based on ecmd->port.
2945 * Actually PORT_FIBRE is nearly identical to PORT_MII: it's for fibre
2946 * phys that are connected to the mii bus. It's used to apply fibre
2950 /* WHEW! now lets bang some bits */
2952 /* save the parms */
2953 dev->if_port = ecmd->port;
2954 np->autoneg = ecmd->autoneg;
2955 np->phy_addr_external = ecmd->phy_address & PhyAddrMask;
2956 if (np->autoneg == AUTONEG_ENABLE) {
2957 /* advertise only what has been requested */
2958 np->advertising &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
2959 if (ecmd->advertising & ADVERTISED_10baseT_Half)
2960 np->advertising |= ADVERTISE_10HALF;
2961 if (ecmd->advertising & ADVERTISED_10baseT_Full)
2962 np->advertising |= ADVERTISE_10FULL;
2963 if (ecmd->advertising & ADVERTISED_100baseT_Half)
2964 np->advertising |= ADVERTISE_100HALF;
2965 if (ecmd->advertising & ADVERTISED_100baseT_Full)
2966 np->advertising |= ADVERTISE_100FULL;
2968 np->speed = ecmd->speed;
2969 np->duplex = ecmd->duplex;
2970 /* user overriding the initial full duplex parm? */
2971 if (np->duplex == DUPLEX_HALF)
2972 np->full_duplex = 0;
2975 /* get the right phy enabled */
2976 if (ecmd->port == PORT_TP)
2977 switch_port_internal(dev);
2979 switch_port_external(dev);
2981 /* set parms and see how this affected our link status */
2982 init_phy_fixup(dev);
2987 static int netdev_get_regs(struct net_device *dev, u8 *buf)
2992 u32 *rbuf = (u32 *)buf;
2993 void __iomem * ioaddr = ns_ioaddr(dev);
2995 /* read non-mii page 0 of registers */
2996 for (i = 0; i < NATSEMI_PG0_NREGS/2; i++) {
2997 rbuf[i] = readl(ioaddr + i*4);
3000 /* read current mii registers */
3001 for (i = NATSEMI_PG0_NREGS/2; i < NATSEMI_PG0_NREGS; i++)
3002 rbuf[i] = mdio_read(dev, i & 0x1f);
3004 /* read only the 'magic' registers from page 1 */
3005 writew(1, ioaddr + PGSEL);
3006 rbuf[i++] = readw(ioaddr + PMDCSR);
3007 rbuf[i++] = readw(ioaddr + TSTDAT);
3008 rbuf[i++] = readw(ioaddr + DSPCFG);
3009 rbuf[i++] = readw(ioaddr + SDCFG);
3010 writew(0, ioaddr + PGSEL);
3012 /* read RFCR indexed registers */
3013 rfcr = readl(ioaddr + RxFilterAddr);
3014 for (j = 0; j < NATSEMI_RFDR_NREGS; j++) {
3015 writel(j*2, ioaddr + RxFilterAddr);
3016 rbuf[i++] = readw(ioaddr + RxFilterData);
3018 writel(rfcr, ioaddr + RxFilterAddr);
3020 /* the interrupt status is clear-on-read - see if we missed any */
3021 if (rbuf[4] & rbuf[5]) {
3023 "%s: shoot, we dropped an interrupt (%#08x)\n",
3024 dev->name, rbuf[4] & rbuf[5]);
3030 #define SWAP_BITS(x) ( (((x) & 0x0001) << 15) | (((x) & 0x0002) << 13) \
3031 | (((x) & 0x0004) << 11) | (((x) & 0x0008) << 9) \
3032 | (((x) & 0x0010) << 7) | (((x) & 0x0020) << 5) \
3033 | (((x) & 0x0040) << 3) | (((x) & 0x0080) << 1) \
3034 | (((x) & 0x0100) >> 1) | (((x) & 0x0200) >> 3) \
3035 | (((x) & 0x0400) >> 5) | (((x) & 0x0800) >> 7) \
3036 | (((x) & 0x1000) >> 9) | (((x) & 0x2000) >> 11) \
3037 | (((x) & 0x4000) >> 13) | (((x) & 0x8000) >> 15) )
3039 static int netdev_get_eeprom(struct net_device *dev, u8 *buf)
3042 u16 *ebuf = (u16 *)buf;
3043 void __iomem * ioaddr = ns_ioaddr(dev);
3044 struct netdev_private *np = netdev_priv(dev);
3046 /* eeprom_read reads 16 bits, and indexes by 16 bits */
3047 for (i = 0; i < np->eeprom_size/2; i++) {
3048 ebuf[i] = eeprom_read(ioaddr, i);
3049 /* The EEPROM itself stores data bit-swapped, but eeprom_read
3050 * reads it back "sanely". So we swap it back here in order to
3051 * present it to userland as it is stored. */
3052 ebuf[i] = SWAP_BITS(ebuf[i]);
3057 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3059 struct mii_ioctl_data *data = if_mii(rq);
3060 struct netdev_private *np = netdev_priv(dev);
3063 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
3064 case SIOCDEVPRIVATE: /* for binary compat, remove in 2.5 */
3065 data->phy_id = np->phy_addr_external;
3068 case SIOCGMIIREG: /* Read MII PHY register. */
3069 case SIOCDEVPRIVATE+1: /* for binary compat, remove in 2.5 */
3070 /* The phy_id is not enough to uniquely identify
3071 * the intended target. Therefore the command is sent to
3072 * the given mii on the current port.
3074 if (dev->if_port == PORT_TP) {
3075 if ((data->phy_id & 0x1f) == np->phy_addr_external)
3076 data->val_out = mdio_read(dev,
3077 data->reg_num & 0x1f);
3081 move_int_phy(dev, data->phy_id & 0x1f);
3082 data->val_out = miiport_read(dev, data->phy_id & 0x1f,
3083 data->reg_num & 0x1f);
3087 case SIOCSMIIREG: /* Write MII PHY register. */
3088 case SIOCDEVPRIVATE+2: /* for binary compat, remove in 2.5 */
3089 if (!capable(CAP_NET_ADMIN))
3091 if (dev->if_port == PORT_TP) {
3092 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3093 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3094 np->advertising = data->val_in;
3095 mdio_write(dev, data->reg_num & 0x1f,
3099 if ((data->phy_id & 0x1f) == np->phy_addr_external) {
3100 if ((data->reg_num & 0x1f) == MII_ADVERTISE)
3101 np->advertising = data->val_in;
3103 move_int_phy(dev, data->phy_id & 0x1f);
3104 miiport_write(dev, data->phy_id & 0x1f,
3105 data->reg_num & 0x1f,
3114 static void enable_wol_mode(struct net_device *dev, int enable_intr)
3116 void __iomem * ioaddr = ns_ioaddr(dev);
3117 struct netdev_private *np = netdev_priv(dev);
3119 if (netif_msg_wol(np))
3120 printk(KERN_INFO "%s: remaining active for wake-on-lan\n",
3123 /* For WOL we must restart the rx process in silent mode.
3124 * Write NULL to the RxRingPtr. Only possible if
3125 * rx process is stopped
3127 writel(0, ioaddr + RxRingPtr);
3129 /* read WoL status to clear */
3130 readl(ioaddr + WOLCmd);
3132 /* PME on, clear status */
3133 writel(np->SavedClkRun | PMEEnable | PMEStatus, ioaddr + ClkRun);
3135 /* and restart the rx process */
3136 writel(RxOn, ioaddr + ChipCmd);
3139 /* enable the WOL interrupt.
3140 * Could be used to send a netlink message.
3142 writel(WOLPkt | LinkChange, ioaddr + IntrMask);
3143 natsemi_irq_enable(dev);
3147 static int netdev_close(struct net_device *dev)
3149 void __iomem * ioaddr = ns_ioaddr(dev);
3150 struct netdev_private *np = netdev_priv(dev);
3152 if (netif_msg_ifdown(np))
3154 "%s: Shutting down ethercard, status was %#04x.\n",
3155 dev->name, (int)readl(ioaddr + ChipCmd));
3156 if (netif_msg_pktdata(np))
3158 "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
3159 dev->name, np->cur_tx, np->dirty_tx,
3160 np->cur_rx, np->dirty_rx);
3162 napi_disable(&np->napi);
3165 * FIXME: what if someone tries to close a device
3166 * that is suspended?
3167 * Should we reenable the nic to switch to
3168 * the final WOL settings?
3171 del_timer_sync(&np->timer);
3172 disable_irq(dev->irq);
3173 spin_lock_irq(&np->lock);
3174 natsemi_irq_disable(dev);
3176 spin_unlock_irq(&np->lock);
3177 enable_irq(dev->irq);
3179 free_irq(dev->irq, dev);
3181 /* Interrupt disabled, interrupt handler released,
3182 * queue stopped, timer deleted, rtnl_lock held
3183 * All async codepaths that access the driver are disabled.
3185 spin_lock_irq(&np->lock);
3187 readl(ioaddr + IntrMask);
3188 readw(ioaddr + MIntrStatus);
3191 writel(StatsFreeze, ioaddr + StatsCtrl);
3193 /* Stop the chip's Tx and Rx processes. */
3194 natsemi_stop_rxtx(dev);
3197 spin_unlock_irq(&np->lock);
3199 /* clear the carrier last - an interrupt could reenable it otherwise */
3200 netif_carrier_off(dev);
3201 netif_stop_queue(dev);
3208 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3210 /* restart the NIC in WOL mode.
3211 * The nic must be stopped for this.
3213 enable_wol_mode(dev, 0);
3215 /* Restore PME enable bit unmolested */
3216 writel(np->SavedClkRun, ioaddr + ClkRun);
3223 static void __devexit natsemi_remove1 (struct pci_dev *pdev)
3225 struct net_device *dev = pci_get_drvdata(pdev);
3226 void __iomem * ioaddr = ns_ioaddr(dev);
3228 NATSEMI_REMOVE_FILE(pdev, dspcfg_workaround);
3229 unregister_netdev (dev);
3230 pci_release_regions (pdev);
3233 pci_set_drvdata(pdev, NULL);
3239 * The ns83815 chip doesn't have explicit RxStop bits.
3240 * Kicking the Rx or Tx process for a new packet reenables the Rx process
3241 * of the nic, thus this function must be very careful:
3243 * suspend/resume synchronization:
3245 * netdev_open, netdev_close, netdev_ioctl, set_rx_mode, intr_handler,
3246 * start_tx, tx_timeout
3248 * No function accesses the hardware without checking np->hands_off.
3249 * the check occurs under spin_lock_irq(&np->lock);
3251 * * netdev_ioctl: noncritical access.
3252 * * netdev_open: cannot happen due to the device_detach
3253 * * netdev_close: doesn't hurt.
3254 * * netdev_timer: timer stopped by natsemi_suspend.
3255 * * intr_handler: doesn't acquire the spinlock. suspend calls
3256 * disable_irq() to enforce synchronization.
3257 * * natsemi_poll: checks before reenabling interrupts. suspend
3258 * sets hands_off, disables interrupts and then waits with
3261 * Interrupts must be disabled, otherwise hands_off can cause irq storms.
3264 static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state)
3266 struct net_device *dev = pci_get_drvdata (pdev);
3267 struct netdev_private *np = netdev_priv(dev);
3268 void __iomem * ioaddr = ns_ioaddr(dev);
3271 if (netif_running (dev)) {
3272 del_timer_sync(&np->timer);
3274 disable_irq(dev->irq);
3275 spin_lock_irq(&np->lock);
3277 natsemi_irq_disable(dev);
3279 natsemi_stop_rxtx(dev);
3280 netif_stop_queue(dev);
3282 spin_unlock_irq(&np->lock);
3283 enable_irq(dev->irq);
3285 napi_disable(&np->napi);
3287 /* Update the error counts. */
3290 /* pci_power_off(pdev, -1); */
3293 u32 wol = readl(ioaddr + WOLCmd) & WakeOptsSummary;
3294 /* Restore PME enable bit */
3296 /* restart the NIC in WOL mode.
3297 * The nic must be stopped for this.
3298 * FIXME: use the WOL interrupt
3300 enable_wol_mode(dev, 0);
3302 /* Restore PME enable bit unmolested */
3303 writel(np->SavedClkRun, ioaddr + ClkRun);
3307 netif_device_detach(dev);
3313 static int natsemi_resume (struct pci_dev *pdev)
3315 struct net_device *dev = pci_get_drvdata (pdev);
3316 struct netdev_private *np = netdev_priv(dev);
3320 if (netif_device_present(dev))
3322 if (netif_running(dev)) {
3323 BUG_ON(!np->hands_off);
3324 ret = pci_enable_device(pdev);
3327 "pci_enable_device() failed: %d\n", ret);
3330 /* pci_power_on(pdev); */
3332 napi_enable(&np->napi);
3336 disable_irq(dev->irq);
3337 spin_lock_irq(&np->lock);
3339 init_registers(dev);
3340 netif_device_attach(dev);
3341 spin_unlock_irq(&np->lock);
3342 enable_irq(dev->irq);
3344 mod_timer(&np->timer, round_jiffies(jiffies + 1*HZ));
3346 netif_device_attach(dev);
3352 #endif /* CONFIG_PM */
3354 static struct pci_driver natsemi_driver = {
3356 .id_table = natsemi_pci_tbl,
3357 .probe = natsemi_probe1,
3358 .remove = __devexit_p(natsemi_remove1),
3360 .suspend = natsemi_suspend,
3361 .resume = natsemi_resume,
3365 static int __init natsemi_init_mod (void)
3367 /* when a module, this is printed whether or not devices are found in probe */
3372 return pci_register_driver(&natsemi_driver);
3375 static void __exit natsemi_exit_mod (void)
3377 pci_unregister_driver (&natsemi_driver);
3380 module_init(natsemi_init_mod);
3381 module_exit(natsemi_exit_mod);