1 /* winbond-840.c: A Linux PCI network adapter device driver. */
3 Written 1998-2001 by Donald Becker.
5 This software may be used and distributed according to the terms of
6 the GNU General Public License (GPL), incorporated herein by reference.
7 Drivers based on or derived from this code fall under the GPL and must
8 retain the authorship, copyright and license notice. This file is not
9 a complete program and may only be used when the entire operating
10 system is licensed under the GPL.
12 The author may be reached as becker@scyld.com, or C/O
13 Scyld Computing Corporation
14 410 Severn Ave., Suite 210
17 Support and updates available at
18 http://www.scyld.com/network/drivers.html
20 Do not remove the copyright information.
21 Do not change the version information unless an improvement has been made.
22 Merely removing my name, as Compex has done in the past, does not count
28 * spin lock update, memory barriers, new style dma mappings
29 limit each tx buffer to < 1024 bytes
30 remove DescIntr from Rx descriptors (that's an Tx flag)
31 remove next pointer from Tx descriptors
32 synchronize tx_q_bytes
33 software reset in tx_timeout
34 Copyright (C) 2000 Manfred Spraul
37 support for big endian descriptors
38 Copyright (C) 2001 Manfred Spraul
39 * ethtool support (jgarzik)
40 * Replace some MII-related magic numbers with constants (jgarzik)
43 * enable pci_power_off
47 #define DRV_NAME "winbond-840"
48 #define DRV_VERSION "1.01-e"
49 #define DRV_RELDATE "Sep-11-2006"
52 /* Automatically extracted configuration info:
53 probe-func: winbond840_probe
54 config-in: tristate 'Winbond W89c840 Ethernet support' CONFIG_WINBOND_840
56 c-help-name: Winbond W89c840 PCI Ethernet support
57 c-help-symbol: CONFIG_WINBOND_840
58 c-help: This driver is for the Winbond W89c840 chip. It also works with
59 c-help: the TX9882 chip on the Compex RL100-ATX board.
60 c-help: More specific information and updates are available from
61 c-help: http://www.scyld.com/network/drivers.html
64 /* The user-configurable values.
65 These may be modified when a driver module is loaded.*/
67 static int debug = 1; /* 1 normal messages, 0 quiet .. 7 verbose. */
68 static int max_interrupt_work = 20;
69 /* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
70 The '840 uses a 64 element hash table based on the Ethernet CRC. */
71 static int multicast_filter_limit = 32;
73 /* Set the copy breakpoint for the copy-only-tiny-frames scheme.
74 Setting to > 1518 effectively disables this feature. */
75 static int rx_copybreak;
77 /* Used to pass the media type, etc.
78 Both 'options[]' and 'full_duplex[]' should exist for driver
80 The media type is usually passed in 'options[]'.
82 #define MAX_UNITS 8 /* More are supported, limit only on options */
83 static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
84 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
86 /* Operational parameters that are set at compile time. */
88 /* Keep the ring sizes a power of two for compile efficiency.
89 The compiler will convert <unsigned>'%'<2^N> into a bit mask.
90 Making the Tx ring too large decreases the effectiveness of channel
91 bonding and packet priority.
92 There are no ill effects from too-large receive rings. */
93 #define TX_QUEUE_LEN 10 /* Limit ring entries actually used. */
94 #define TX_QUEUE_LEN_RESTART 5
96 #define TX_BUFLIMIT (1024-128)
98 /* The presumed FIFO size for working around the Tx-FIFO-overflow bug.
99 To avoid overflowing we don't queue again until we have room for a
102 #define TX_FIFO_SIZE (2048)
103 #define TX_BUG_FIFO_LIMIT (TX_FIFO_SIZE-1514-16)
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 /* Include files, designed to support most kernel versions 2.0.0 and later. */
111 #include <linux/module.h>
112 #include <linux/kernel.h>
113 #include <linux/string.h>
114 #include <linux/timer.h>
115 #include <linux/errno.h>
116 #include <linux/ioport.h>
117 #include <linux/slab.h>
118 #include <linux/interrupt.h>
119 #include <linux/pci.h>
120 #include <linux/dma-mapping.h>
121 #include <linux/netdevice.h>
122 #include <linux/etherdevice.h>
123 #include <linux/skbuff.h>
124 #include <linux/init.h>
125 #include <linux/delay.h>
126 #include <linux/ethtool.h>
127 #include <linux/mii.h>
128 #include <linux/rtnetlink.h>
129 #include <linux/crc32.h>
130 #include <linux/bitops.h>
131 #include <asm/uaccess.h>
132 #include <asm/processor.h> /* Processor type for cache alignment. */
138 #undef PKT_BUF_SZ /* tulip.h also defines this */
139 #define PKT_BUF_SZ 1536 /* Size of each temporary Rx buffer.*/
141 /* These identify the driver base version and may not be removed. */
142 static const char version[] __initconst =
143 KERN_INFO DRV_NAME ".c:v" DRV_VERSION " (2.4 port) "
144 DRV_RELDATE " Donald Becker <becker@scyld.com>\n"
145 KERN_INFO " http://www.scyld.com/network/drivers.html\n";
147 MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
148 MODULE_DESCRIPTION("Winbond W89c840 Ethernet driver");
149 MODULE_LICENSE("GPL");
150 MODULE_VERSION(DRV_VERSION);
152 module_param(max_interrupt_work, int, 0);
153 module_param(debug, int, 0);
154 module_param(rx_copybreak, int, 0);
155 module_param(multicast_filter_limit, int, 0);
156 module_param_array(options, int, NULL, 0);
157 module_param_array(full_duplex, int, NULL, 0);
158 MODULE_PARM_DESC(max_interrupt_work, "winbond-840 maximum events handled per interrupt");
159 MODULE_PARM_DESC(debug, "winbond-840 debug level (0-6)");
160 MODULE_PARM_DESC(rx_copybreak, "winbond-840 copy breakpoint for copy-only-tiny-frames");
161 MODULE_PARM_DESC(multicast_filter_limit, "winbond-840 maximum number of filtered multicast addresses");
162 MODULE_PARM_DESC(options, "winbond-840: Bits 0-3: media type, bit 17: full duplex");
163 MODULE_PARM_DESC(full_duplex, "winbond-840 full duplex setting(s) (1)");
168 I. Board Compatibility
170 This driver is for the Winbond w89c840 chip.
172 II. Board-specific settings
176 III. Driver operation
178 This chip is very similar to the Digital 21*4* "Tulip" family. The first
179 twelve registers and the descriptor format are nearly identical. Read a
180 Tulip manual for operational details.
182 A significant difference is that the multicast filter and station address are
183 stored in registers rather than loaded through a pseudo-transmit packet.
185 Unlike the Tulip, transmit buffers are limited to 1KB. To transmit a
186 full-sized packet we must use both data buffers in a descriptor. Thus the
187 driver uses ring mode where descriptors are implicitly sequential in memory,
188 rather than using the second descriptor address as a chain pointer to
189 subsequent descriptors.
193 If you are going to almost clone a Tulip, why not go all the way and avoid
194 the need for a new driver?
198 http://www.scyld.com/expert/100mbps.html
199 http://www.scyld.com/expert/NWay.html
200 http://www.winbond.com.tw/
204 A horrible bug exists in the transmit FIFO. Apparently the chip doesn't
205 correctly detect a full FIFO, and queuing more than 2048 bytes may result in
206 silent data corruption.
208 Test with 'ping -s 10000' on a fast computer.
217 enum chip_capability_flags {
218 CanHaveMII=1, HasBrokenTx=2, AlwaysFDX=4, FDXOnNoMII=8,
221 static const struct pci_device_id w840_pci_tbl[] = {
222 { 0x1050, 0x0840, PCI_ANY_ID, 0x8153, 0, 0, 0 },
223 { 0x1050, 0x0840, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
224 { 0x11f6, 0x2011, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2 },
227 MODULE_DEVICE_TABLE(pci, w840_pci_tbl);
230 netdev_res_size = 128, /* size of PCI BAR resource */
235 int drv_flags; /* Driver use, intended as capability flags. */
238 static const struct pci_id_info pci_id_tbl[] __devinitdata = {
239 { /* Sometime a Level-One switch card. */
240 "Winbond W89c840", CanHaveMII | HasBrokenTx | FDXOnNoMII},
241 { "Winbond W89c840", CanHaveMII | HasBrokenTx},
242 { "Compex RL100-ATX", CanHaveMII | HasBrokenTx},
243 { } /* terminate list. */
246 /* This driver was written to use PCI memory space, however some x86 systems
247 work only with I/O space accesses. See CONFIG_TULIP_MMIO in .config
250 /* Offsets to the Command and Status Registers, "CSRs".
251 While similar to the Tulip, these registers are longword aligned.
252 Note: It's not useful to define symbolic names for every register bit in
253 the device. The name can only partially document the semantics and make
254 the driver longer and more difficult to read.
257 PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08,
258 RxRingPtr=0x0C, TxRingPtr=0x10,
259 IntrStatus=0x14, NetworkConfig=0x18, IntrEnable=0x1C,
260 RxMissed=0x20, EECtrl=0x24, MIICtrl=0x24, BootRom=0x28, GPTimer=0x2C,
261 CurRxDescAddr=0x30, CurRxBufAddr=0x34, /* Debug use */
262 MulticastFilter0=0x38, MulticastFilter1=0x3C, StationAddr=0x40,
263 CurTxDescAddr=0x4C, CurTxBufAddr=0x50,
266 /* Bits in the NetworkConfig register. */
269 RxAcceptBroadcast=0x20, AcceptMulticast=0x10,
270 RxAcceptAllPhys=0x08, AcceptMyPhys=0x02,
274 MDIO_ShiftClk=0x10000, MDIO_DataIn=0x80000, MDIO_DataOut=0x20000,
275 MDIO_EnbOutput=0x40000, MDIO_EnbIn = 0x00000,
278 /* The Tulip Rx and Tx buffer descriptors. */
279 struct w840_rx_desc {
286 struct w840_tx_desc {
289 u32 buffer1, buffer2;
292 #define MII_CNT 1 /* winbond only supports one MII */
293 struct netdev_private {
294 struct w840_rx_desc *rx_ring;
295 dma_addr_t rx_addr[RX_RING_SIZE];
296 struct w840_tx_desc *tx_ring;
297 dma_addr_t tx_addr[TX_RING_SIZE];
298 dma_addr_t ring_dma_addr;
299 /* The addresses of receive-in-place skbuffs. */
300 struct sk_buff* rx_skbuff[RX_RING_SIZE];
301 /* The saved address of a sent-in-place packet/buffer, for later free(). */
302 struct sk_buff* tx_skbuff[TX_RING_SIZE];
303 struct net_device_stats stats;
304 struct timer_list timer; /* Media monitoring timer. */
305 /* Frequently used values: keep some adjacent for cache effect. */
307 int chip_id, drv_flags;
308 struct pci_dev *pci_dev;
310 struct w840_rx_desc *rx_head_desc;
311 unsigned int cur_rx, dirty_rx; /* Producer/consumer ring indices */
312 unsigned int rx_buf_sz; /* Based on MTU+slack. */
313 unsigned int cur_tx, dirty_tx;
314 unsigned int tx_q_bytes;
315 unsigned int tx_full; /* The Tx queue is full. */
316 /* MII transceiver section. */
317 int mii_cnt; /* MII device addresses. */
318 unsigned char phys[MII_CNT]; /* MII device addresses, but only the first is used */
320 struct mii_if_info mii_if;
321 void __iomem *base_addr;
324 static int eeprom_read(void __iomem *ioaddr, int location);
325 static int mdio_read(struct net_device *dev, int phy_id, int location);
326 static void mdio_write(struct net_device *dev, int phy_id, int location, int value);
327 static int netdev_open(struct net_device *dev);
328 static int update_link(struct net_device *dev);
329 static void netdev_timer(unsigned long data);
330 static void init_rxtx_rings(struct net_device *dev);
331 static void free_rxtx_rings(struct netdev_private *np);
332 static void init_registers(struct net_device *dev);
333 static void tx_timeout(struct net_device *dev);
334 static int alloc_ringdesc(struct net_device *dev);
335 static void free_ringdesc(struct netdev_private *np);
336 static int start_tx(struct sk_buff *skb, struct net_device *dev);
337 static irqreturn_t intr_handler(int irq, void *dev_instance);
338 static void netdev_error(struct net_device *dev, int intr_status);
339 static int netdev_rx(struct net_device *dev);
340 static u32 __set_rx_mode(struct net_device *dev);
341 static void set_rx_mode(struct net_device *dev);
342 static struct net_device_stats *get_stats(struct net_device *dev);
343 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
344 static const struct ethtool_ops netdev_ethtool_ops;
345 static int netdev_close(struct net_device *dev);
347 static const struct net_device_ops netdev_ops = {
348 .ndo_open = netdev_open,
349 .ndo_stop = netdev_close,
350 .ndo_start_xmit = start_tx,
351 .ndo_get_stats = get_stats,
352 .ndo_set_multicast_list = set_rx_mode,
353 .ndo_do_ioctl = netdev_ioctl,
354 .ndo_tx_timeout = tx_timeout,
355 .ndo_change_mtu = eth_change_mtu,
356 .ndo_set_mac_address = eth_mac_addr,
357 .ndo_validate_addr = eth_validate_addr,
360 static int __devinit w840_probe1 (struct pci_dev *pdev,
361 const struct pci_device_id *ent)
363 struct net_device *dev;
364 struct netdev_private *np;
366 int chip_idx = ent->driver_data;
368 int i, option = find_cnt < MAX_UNITS ? options[find_cnt] : 0;
369 void __iomem *ioaddr;
371 i = pci_enable_device(pdev);
374 pci_set_master(pdev);
378 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
379 printk(KERN_WARNING "Winbond-840: Device %s disabled due to DMA limitations.\n",
383 dev = alloc_etherdev(sizeof(*np));
386 SET_NETDEV_DEV(dev, &pdev->dev);
388 if (pci_request_regions(pdev, DRV_NAME))
391 ioaddr = pci_iomap(pdev, TULIP_BAR, netdev_res_size);
393 goto err_out_free_res;
395 for (i = 0; i < 3; i++)
396 ((__le16 *)dev->dev_addr)[i] = cpu_to_le16(eeprom_read(ioaddr, i));
398 /* Reset the chip to erase previous misconfiguration.
399 No hold time required! */
400 iowrite32(0x00000001, ioaddr + PCIBusCfg);
402 dev->base_addr = (unsigned long)ioaddr;
405 np = netdev_priv(dev);
407 np->chip_id = chip_idx;
408 np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
409 spin_lock_init(&np->lock);
410 np->mii_if.dev = dev;
411 np->mii_if.mdio_read = mdio_read;
412 np->mii_if.mdio_write = mdio_write;
413 np->base_addr = ioaddr;
415 pci_set_drvdata(pdev, dev);
418 option = dev->mem_start;
420 /* The lower four bits are the media type. */
423 np->mii_if.full_duplex = 1;
425 printk(KERN_INFO "%s: ignoring user supplied media type %d",
426 dev->name, option & 15);
428 if (find_cnt < MAX_UNITS && full_duplex[find_cnt] > 0)
429 np->mii_if.full_duplex = 1;
431 if (np->mii_if.full_duplex)
432 np->mii_if.force_media = 1;
434 /* The chip-specific entries in the device structure. */
435 dev->netdev_ops = &netdev_ops;
436 dev->ethtool_ops = &netdev_ethtool_ops;
437 dev->watchdog_timeo = TX_TIMEOUT;
439 i = register_netdev(dev);
441 goto err_out_cleardev;
443 printk(KERN_INFO "%s: %s at %p, %pM, IRQ %d.\n",
444 dev->name, pci_id_tbl[chip_idx].name, ioaddr,
447 if (np->drv_flags & CanHaveMII) {
448 int phy, phy_idx = 0;
449 for (phy = 1; phy < 32 && phy_idx < MII_CNT; phy++) {
450 int mii_status = mdio_read(dev, phy, MII_BMSR);
451 if (mii_status != 0xffff && mii_status != 0x0000) {
452 np->phys[phy_idx++] = phy;
453 np->mii_if.advertising = mdio_read(dev, phy, MII_ADVERTISE);
454 np->mii = (mdio_read(dev, phy, MII_PHYSID1) << 16)+
455 mdio_read(dev, phy, MII_PHYSID2);
456 printk(KERN_INFO "%s: MII PHY %8.8xh found at address %d, status "
457 "0x%4.4x advertising %4.4x.\n",
458 dev->name, np->mii, phy, mii_status, np->mii_if.advertising);
461 np->mii_cnt = phy_idx;
462 np->mii_if.phy_id = np->phys[0];
464 printk(KERN_WARNING "%s: MII PHY not found -- this device may "
465 "not operate correctly.\n", dev->name);
473 pci_set_drvdata(pdev, NULL);
474 pci_iounmap(pdev, ioaddr);
476 pci_release_regions(pdev);
483 /* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. These are
484 often serial bit streams generated by the host processor.
485 The example below is for the common 93c46 EEPROM, 64 16 bit words. */
487 /* Delay between EEPROM clock transitions.
488 No extra delay is needed with 33Mhz PCI, but future 66Mhz access may need
489 a delay. Note that pre-2.0.34 kernels had a cache-alignment bug that
490 made udelay() unreliable.
491 The old method of using an ISA access as a delay, __SLOW_DOWN_IO__, is
494 #define eeprom_delay(ee_addr) ioread32(ee_addr)
496 enum EEPROM_Ctrl_Bits {
497 EE_ShiftClk=0x02, EE_Write0=0x801, EE_Write1=0x805,
498 EE_ChipSelect=0x801, EE_DataIn=0x08,
501 /* The EEPROM commands include the alway-set leading bit. */
503 EE_WriteCmd=(5 << 6), EE_ReadCmd=(6 << 6), EE_EraseCmd=(7 << 6),
506 static int eeprom_read(void __iomem *addr, int location)
510 void __iomem *ee_addr = addr + EECtrl;
511 int read_cmd = location | EE_ReadCmd;
512 iowrite32(EE_ChipSelect, ee_addr);
514 /* Shift the read command bits out. */
515 for (i = 10; i >= 0; i--) {
516 short dataval = (read_cmd & (1 << i)) ? EE_Write1 : EE_Write0;
517 iowrite32(dataval, ee_addr);
518 eeprom_delay(ee_addr);
519 iowrite32(dataval | EE_ShiftClk, ee_addr);
520 eeprom_delay(ee_addr);
522 iowrite32(EE_ChipSelect, ee_addr);
523 eeprom_delay(ee_addr);
525 for (i = 16; i > 0; i--) {
526 iowrite32(EE_ChipSelect | EE_ShiftClk, ee_addr);
527 eeprom_delay(ee_addr);
528 retval = (retval << 1) | ((ioread32(ee_addr) & EE_DataIn) ? 1 : 0);
529 iowrite32(EE_ChipSelect, ee_addr);
530 eeprom_delay(ee_addr);
533 /* Terminate the EEPROM access. */
534 iowrite32(0, ee_addr);
538 /* MII transceiver control section.
539 Read and write the MII registers using software-generated serial
540 MDIO protocol. See the MII specifications or DP83840A data sheet
543 The maximum data clock rate is 2.5 Mhz. The minimum timing is usually
544 met by back-to-back 33Mhz PCI cycles. */
545 #define mdio_delay(mdio_addr) ioread32(mdio_addr)
547 /* Set iff a MII transceiver on any interface requires mdio preamble.
548 This only set with older transceivers, so the extra
549 code size of a per-interface flag is not worthwhile. */
550 static char mii_preamble_required = 1;
552 #define MDIO_WRITE0 (MDIO_EnbOutput)
553 #define MDIO_WRITE1 (MDIO_DataOut | MDIO_EnbOutput)
555 /* Generate the preamble required for initial synchronization and
556 a few older transceivers. */
557 static void mdio_sync(void __iomem *mdio_addr)
561 /* Establish sync by sending at least 32 logic ones. */
562 while (--bits >= 0) {
563 iowrite32(MDIO_WRITE1, mdio_addr);
564 mdio_delay(mdio_addr);
565 iowrite32(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
566 mdio_delay(mdio_addr);
570 static int mdio_read(struct net_device *dev, int phy_id, int location)
572 struct netdev_private *np = netdev_priv(dev);
573 void __iomem *mdio_addr = np->base_addr + MIICtrl;
574 int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
577 if (mii_preamble_required)
578 mdio_sync(mdio_addr);
580 /* Shift the read command bits out. */
581 for (i = 15; i >= 0; i--) {
582 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
584 iowrite32(dataval, mdio_addr);
585 mdio_delay(mdio_addr);
586 iowrite32(dataval | MDIO_ShiftClk, mdio_addr);
587 mdio_delay(mdio_addr);
589 /* Read the two transition, 16 data, and wire-idle bits. */
590 for (i = 20; i > 0; i--) {
591 iowrite32(MDIO_EnbIn, mdio_addr);
592 mdio_delay(mdio_addr);
593 retval = (retval << 1) | ((ioread32(mdio_addr) & MDIO_DataIn) ? 1 : 0);
594 iowrite32(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
595 mdio_delay(mdio_addr);
597 return (retval>>1) & 0xffff;
600 static void mdio_write(struct net_device *dev, int phy_id, int location, int value)
602 struct netdev_private *np = netdev_priv(dev);
603 void __iomem *mdio_addr = np->base_addr + MIICtrl;
604 int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
607 if (location == 4 && phy_id == np->phys[0])
608 np->mii_if.advertising = value;
610 if (mii_preamble_required)
611 mdio_sync(mdio_addr);
613 /* Shift the command bits out. */
614 for (i = 31; i >= 0; i--) {
615 int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
617 iowrite32(dataval, mdio_addr);
618 mdio_delay(mdio_addr);
619 iowrite32(dataval | MDIO_ShiftClk, mdio_addr);
620 mdio_delay(mdio_addr);
622 /* Clear out extra bits. */
623 for (i = 2; i > 0; i--) {
624 iowrite32(MDIO_EnbIn, mdio_addr);
625 mdio_delay(mdio_addr);
626 iowrite32(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
627 mdio_delay(mdio_addr);
633 static int netdev_open(struct net_device *dev)
635 struct netdev_private *np = netdev_priv(dev);
636 void __iomem *ioaddr = np->base_addr;
639 iowrite32(0x00000001, ioaddr + PCIBusCfg); /* Reset */
641 netif_device_detach(dev);
642 i = request_irq(dev->irq, &intr_handler, IRQF_SHARED, dev->name, dev);
647 printk(KERN_DEBUG "%s: w89c840_open() irq %d.\n",
648 dev->name, dev->irq);
650 if((i=alloc_ringdesc(dev)))
653 spin_lock_irq(&np->lock);
654 netif_device_attach(dev);
656 spin_unlock_irq(&np->lock);
658 netif_start_queue(dev);
660 printk(KERN_DEBUG "%s: Done netdev_open().\n", dev->name);
662 /* Set the timer to check for link beat. */
663 init_timer(&np->timer);
664 np->timer.expires = jiffies + 1*HZ;
665 np->timer.data = (unsigned long)dev;
666 np->timer.function = &netdev_timer; /* timer handler */
667 add_timer(&np->timer);
670 netif_device_attach(dev);
674 #define MII_DAVICOM_DM9101 0x0181b800
676 static int update_link(struct net_device *dev)
678 struct netdev_private *np = netdev_priv(dev);
679 int duplex, fasteth, result, mii_reg;
682 mii_reg = mdio_read(dev, np->phys[0], MII_BMSR);
684 if (mii_reg == 0xffff)
686 /* reread: the link status bit is sticky */
687 mii_reg = mdio_read(dev, np->phys[0], MII_BMSR);
688 if (!(mii_reg & 0x4)) {
689 if (netif_carrier_ok(dev)) {
691 printk(KERN_INFO "%s: MII #%d reports no link. Disabling watchdog.\n",
692 dev->name, np->phys[0]);
693 netif_carrier_off(dev);
697 if (!netif_carrier_ok(dev)) {
699 printk(KERN_INFO "%s: MII #%d link is back. Enabling watchdog.\n",
700 dev->name, np->phys[0]);
701 netif_carrier_on(dev);
704 if ((np->mii & ~0xf) == MII_DAVICOM_DM9101) {
705 /* If the link partner doesn't support autonegotiation
706 * the MII detects it's abilities with the "parallel detection".
707 * Some MIIs update the LPA register to the result of the parallel
708 * detection, some don't.
709 * The Davicom PHY [at least 0181b800] doesn't.
710 * Instead bit 9 and 13 of the BMCR are updated to the result
711 * of the negotiation..
713 mii_reg = mdio_read(dev, np->phys[0], MII_BMCR);
714 duplex = mii_reg & BMCR_FULLDPLX;
715 fasteth = mii_reg & BMCR_SPEED100;
718 mii_reg = mdio_read(dev, np->phys[0], MII_LPA);
719 negotiated = mii_reg & np->mii_if.advertising;
721 duplex = (negotiated & LPA_100FULL) || ((negotiated & 0x02C0) == LPA_10FULL);
722 fasteth = negotiated & 0x380;
724 duplex |= np->mii_if.force_media;
725 /* remove fastether and fullduplex */
726 result = np->csr6 & ~0x20000200;
730 result |= 0x20000000;
731 if (result != np->csr6 && debug)
732 printk(KERN_INFO "%s: Setting %dMBit-%s-duplex based on MII#%d\n",
733 dev->name, fasteth ? 100 : 10,
734 duplex ? "full" : "half", np->phys[0]);
738 #define RXTX_TIMEOUT 2000
739 static inline void update_csr6(struct net_device *dev, int new)
741 struct netdev_private *np = netdev_priv(dev);
742 void __iomem *ioaddr = np->base_addr;
743 int limit = RXTX_TIMEOUT;
745 if (!netif_device_present(dev))
749 /* stop both Tx and Rx processes */
750 iowrite32(np->csr6 & ~0x2002, ioaddr + NetworkConfig);
751 /* wait until they have really stopped */
753 int csr5 = ioread32(ioaddr + IntrStatus);
756 t = (csr5 >> 17) & 0x07;
759 t = (csr5 >> 20) & 0x07;
766 printk(KERN_INFO "%s: couldn't stop rxtx, IntrStatus %xh.\n",
773 /* and restart them with the new configuration */
774 iowrite32(np->csr6, ioaddr + NetworkConfig);
776 np->mii_if.full_duplex = 1;
779 static void netdev_timer(unsigned long data)
781 struct net_device *dev = (struct net_device *)data;
782 struct netdev_private *np = netdev_priv(dev);
783 void __iomem *ioaddr = np->base_addr;
786 printk(KERN_DEBUG "%s: Media selection timer tick, status %8.8x "
788 dev->name, ioread32(ioaddr + IntrStatus),
789 ioread32(ioaddr + NetworkConfig));
790 spin_lock_irq(&np->lock);
791 update_csr6(dev, update_link(dev));
792 spin_unlock_irq(&np->lock);
793 np->timer.expires = jiffies + 10*HZ;
794 add_timer(&np->timer);
797 static void init_rxtx_rings(struct net_device *dev)
799 struct netdev_private *np = netdev_priv(dev);
802 np->rx_head_desc = &np->rx_ring[0];
803 np->tx_ring = (struct w840_tx_desc*)&np->rx_ring[RX_RING_SIZE];
805 /* Initial all Rx descriptors. */
806 for (i = 0; i < RX_RING_SIZE; i++) {
807 np->rx_ring[i].length = np->rx_buf_sz;
808 np->rx_ring[i].status = 0;
809 np->rx_skbuff[i] = NULL;
811 /* Mark the last entry as wrapping the ring. */
812 np->rx_ring[i-1].length |= DescEndRing;
814 /* Fill in the Rx buffers. Handle allocation failure gracefully. */
815 for (i = 0; i < RX_RING_SIZE; i++) {
816 struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
817 np->rx_skbuff[i] = skb;
820 np->rx_addr[i] = pci_map_single(np->pci_dev,skb->data,
821 np->rx_buf_sz,PCI_DMA_FROMDEVICE);
823 np->rx_ring[i].buffer1 = np->rx_addr[i];
824 np->rx_ring[i].status = DescOwned;
828 np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
830 /* Initialize the Tx descriptors */
831 for (i = 0; i < TX_RING_SIZE; i++) {
832 np->tx_skbuff[i] = NULL;
833 np->tx_ring[i].status = 0;
836 np->tx_q_bytes = np->dirty_tx = np->cur_tx = 0;
838 iowrite32(np->ring_dma_addr, np->base_addr + RxRingPtr);
839 iowrite32(np->ring_dma_addr+sizeof(struct w840_rx_desc)*RX_RING_SIZE,
840 np->base_addr + TxRingPtr);
844 static void free_rxtx_rings(struct netdev_private* np)
847 /* Free all the skbuffs in the Rx queue. */
848 for (i = 0; i < RX_RING_SIZE; i++) {
849 np->rx_ring[i].status = 0;
850 if (np->rx_skbuff[i]) {
851 pci_unmap_single(np->pci_dev,
853 np->rx_skbuff[i]->len,
855 dev_kfree_skb(np->rx_skbuff[i]);
857 np->rx_skbuff[i] = NULL;
859 for (i = 0; i < TX_RING_SIZE; i++) {
860 if (np->tx_skbuff[i]) {
861 pci_unmap_single(np->pci_dev,
863 np->tx_skbuff[i]->len,
865 dev_kfree_skb(np->tx_skbuff[i]);
867 np->tx_skbuff[i] = NULL;
871 static void init_registers(struct net_device *dev)
873 struct netdev_private *np = netdev_priv(dev);
874 void __iomem *ioaddr = np->base_addr;
877 for (i = 0; i < 6; i++)
878 iowrite8(dev->dev_addr[i], ioaddr + StationAddr + i);
880 /* Initialize other registers. */
882 i = (1<<20); /* Big-endian descriptors */
886 i |= (0x04<<2); /* skip length 4 u32 */
887 i |= 0x02; /* give Rx priority */
889 /* Configure the PCI bus bursts and FIFO thresholds.
890 486: Set 8 longword cache alignment, 8 longword burst.
891 586: Set 16 longword cache alignment, no burst limit.
892 Cache alignment bits 15:14 Burst length 13:8
893 0000 <not allowed> 0000 align to cache 0800 8 longwords
894 4000 8 longwords 0100 1 longword 1000 16 longwords
895 8000 16 longwords 0200 2 longwords 2000 32 longwords
896 C000 32 longwords 0400 4 longwords */
898 #if defined (__i386__) && !defined(MODULE)
899 /* When not a module we can work around broken '486 PCI boards. */
900 if (boot_cpu_data.x86 <= 4) {
902 printk(KERN_INFO "%s: This is a 386/486 PCI system, setting cache "
903 "alignment to 8 longwords.\n", dev->name);
907 #elif defined(__powerpc__) || defined(__i386__) || defined(__alpha__) || defined(__ia64__) || defined(__x86_64__)
909 #elif defined(CONFIG_SPARC) || defined (CONFIG_PARISC)
912 #warning Processor architecture undefined
915 iowrite32(i, ioaddr + PCIBusCfg);
918 /* 128 byte Tx threshold;
919 Transmit on; Receive on; */
920 update_csr6(dev, 0x00022002 | update_link(dev) | __set_rx_mode(dev));
922 /* Clear and Enable interrupts by setting the interrupt mask. */
923 iowrite32(0x1A0F5, ioaddr + IntrStatus);
924 iowrite32(0x1A0F5, ioaddr + IntrEnable);
926 iowrite32(0, ioaddr + RxStartDemand);
929 static void tx_timeout(struct net_device *dev)
931 struct netdev_private *np = netdev_priv(dev);
932 void __iomem *ioaddr = np->base_addr;
934 printk(KERN_WARNING "%s: Transmit timed out, status %8.8x,"
935 " resetting...\n", dev->name, ioread32(ioaddr + IntrStatus));
939 printk(KERN_DEBUG " Rx ring %p: ", np->rx_ring);
940 for (i = 0; i < RX_RING_SIZE; i++)
941 printk(" %8.8x", (unsigned int)np->rx_ring[i].status);
942 printk("\n"KERN_DEBUG" Tx ring %p: ", np->tx_ring);
943 for (i = 0; i < TX_RING_SIZE; i++)
944 printk(" %8.8x", np->tx_ring[i].status);
947 printk(KERN_DEBUG "Tx cur %d Tx dirty %d Tx Full %d, q bytes %d.\n",
948 np->cur_tx, np->dirty_tx, np->tx_full, np->tx_q_bytes);
949 printk(KERN_DEBUG "Tx Descriptor addr %xh.\n",ioread32(ioaddr+0x4C));
951 disable_irq(dev->irq);
952 spin_lock_irq(&np->lock);
954 * Under high load dirty_tx and the internal tx descriptor pointer
955 * come out of sync, thus perform a software reset and reinitialize
959 iowrite32(1, np->base_addr+PCIBusCfg);
963 init_rxtx_rings(dev);
965 spin_unlock_irq(&np->lock);
966 enable_irq(dev->irq);
968 netif_wake_queue(dev);
969 dev->trans_start = jiffies;
970 np->stats.tx_errors++;
974 /* Initialize the Rx and Tx rings, along with various 'dev' bits. */
975 static int alloc_ringdesc(struct net_device *dev)
977 struct netdev_private *np = netdev_priv(dev);
979 np->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
981 np->rx_ring = pci_alloc_consistent(np->pci_dev,
982 sizeof(struct w840_rx_desc)*RX_RING_SIZE +
983 sizeof(struct w840_tx_desc)*TX_RING_SIZE,
987 init_rxtx_rings(dev);
991 static void free_ringdesc(struct netdev_private *np)
993 pci_free_consistent(np->pci_dev,
994 sizeof(struct w840_rx_desc)*RX_RING_SIZE +
995 sizeof(struct w840_tx_desc)*TX_RING_SIZE,
996 np->rx_ring, np->ring_dma_addr);
1000 static int start_tx(struct sk_buff *skb, struct net_device *dev)
1002 struct netdev_private *np = netdev_priv(dev);
1005 /* Caution: the write order is important here, set the field
1006 with the "ownership" bits last. */
1008 /* Calculate the next Tx descriptor entry. */
1009 entry = np->cur_tx % TX_RING_SIZE;
1011 np->tx_addr[entry] = pci_map_single(np->pci_dev,
1012 skb->data,skb->len, PCI_DMA_TODEVICE);
1013 np->tx_skbuff[entry] = skb;
1015 np->tx_ring[entry].buffer1 = np->tx_addr[entry];
1016 if (skb->len < TX_BUFLIMIT) {
1017 np->tx_ring[entry].length = DescWholePkt | skb->len;
1019 int len = skb->len - TX_BUFLIMIT;
1021 np->tx_ring[entry].buffer2 = np->tx_addr[entry]+TX_BUFLIMIT;
1022 np->tx_ring[entry].length = DescWholePkt | (len << 11) | TX_BUFLIMIT;
1024 if(entry == TX_RING_SIZE-1)
1025 np->tx_ring[entry].length |= DescEndRing;
1027 /* Now acquire the irq spinlock.
1028 * The difficult race is the ordering between
1029 * increasing np->cur_tx and setting DescOwned:
1030 * - if np->cur_tx is increased first the interrupt
1031 * handler could consider the packet as transmitted
1032 * since DescOwned is cleared.
1033 * - If DescOwned is set first the NIC could report the
1034 * packet as sent, but the interrupt handler would ignore it
1035 * since the np->cur_tx was not yet increased.
1037 spin_lock_irq(&np->lock);
1040 wmb(); /* flush length, buffer1, buffer2 */
1041 np->tx_ring[entry].status = DescOwned;
1042 wmb(); /* flush status and kick the hardware */
1043 iowrite32(0, np->base_addr + TxStartDemand);
1044 np->tx_q_bytes += skb->len;
1045 /* Work around horrible bug in the chip by marking the queue as full
1046 when we do not have FIFO room for a maximum sized packet. */
1047 if (np->cur_tx - np->dirty_tx > TX_QUEUE_LEN ||
1048 ((np->drv_flags & HasBrokenTx) && np->tx_q_bytes > TX_BUG_FIFO_LIMIT)) {
1049 netif_stop_queue(dev);
1053 spin_unlock_irq(&np->lock);
1055 dev->trans_start = jiffies;
1058 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
1059 dev->name, np->cur_tx, entry);
1064 static void netdev_tx_done(struct net_device *dev)
1066 struct netdev_private *np = netdev_priv(dev);
1067 for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
1068 int entry = np->dirty_tx % TX_RING_SIZE;
1069 int tx_status = np->tx_ring[entry].status;
1073 if (tx_status & 0x8000) { /* There was an error, log it. */
1074 #ifndef final_version
1076 printk(KERN_DEBUG "%s: Transmit error, Tx status %8.8x.\n",
1077 dev->name, tx_status);
1079 np->stats.tx_errors++;
1080 if (tx_status & 0x0104) np->stats.tx_aborted_errors++;
1081 if (tx_status & 0x0C80) np->stats.tx_carrier_errors++;
1082 if (tx_status & 0x0200) np->stats.tx_window_errors++;
1083 if (tx_status & 0x0002) np->stats.tx_fifo_errors++;
1084 if ((tx_status & 0x0080) && np->mii_if.full_duplex == 0)
1085 np->stats.tx_heartbeat_errors++;
1087 #ifndef final_version
1089 printk(KERN_DEBUG "%s: Transmit slot %d ok, Tx status %8.8x.\n",
1090 dev->name, entry, tx_status);
1092 np->stats.tx_bytes += np->tx_skbuff[entry]->len;
1093 np->stats.collisions += (tx_status >> 3) & 15;
1094 np->stats.tx_packets++;
1096 /* Free the original skb. */
1097 pci_unmap_single(np->pci_dev,np->tx_addr[entry],
1098 np->tx_skbuff[entry]->len,
1100 np->tx_q_bytes -= np->tx_skbuff[entry]->len;
1101 dev_kfree_skb_irq(np->tx_skbuff[entry]);
1102 np->tx_skbuff[entry] = NULL;
1105 np->cur_tx - np->dirty_tx < TX_QUEUE_LEN_RESTART &&
1106 np->tx_q_bytes < TX_BUG_FIFO_LIMIT) {
1107 /* The ring is no longer full, clear tbusy. */
1110 netif_wake_queue(dev);
1114 /* The interrupt handler does all of the Rx thread work and cleans up
1115 after the Tx thread. */
1116 static irqreturn_t intr_handler(int irq, void *dev_instance)
1118 struct net_device *dev = (struct net_device *)dev_instance;
1119 struct netdev_private *np = netdev_priv(dev);
1120 void __iomem *ioaddr = np->base_addr;
1121 int work_limit = max_interrupt_work;
1124 if (!netif_device_present(dev))
1127 u32 intr_status = ioread32(ioaddr + IntrStatus);
1129 /* Acknowledge all of the current interrupt sources ASAP. */
1130 iowrite32(intr_status & 0x001ffff, ioaddr + IntrStatus);
1133 printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
1134 dev->name, intr_status);
1136 if ((intr_status & (NormalIntr|AbnormalIntr)) == 0)
1141 if (intr_status & (RxIntr | RxNoBuf))
1143 if (intr_status & RxNoBuf)
1144 iowrite32(0, ioaddr + RxStartDemand);
1146 if (intr_status & (TxNoBuf | TxIntr) &&
1147 np->cur_tx != np->dirty_tx) {
1148 spin_lock(&np->lock);
1149 netdev_tx_done(dev);
1150 spin_unlock(&np->lock);
1153 /* Abnormal error summary/uncommon events handlers. */
1154 if (intr_status & (AbnormalIntr | TxFIFOUnderflow | SystemError |
1156 netdev_error(dev, intr_status);
1158 if (--work_limit < 0) {
1159 printk(KERN_WARNING "%s: Too much work at interrupt, "
1160 "status=0x%4.4x.\n", dev->name, intr_status);
1161 /* Set the timer to re-enable the other interrupts after
1163 spin_lock(&np->lock);
1164 if (netif_device_present(dev)) {
1165 iowrite32(AbnormalIntr | TimerInt, ioaddr + IntrEnable);
1166 iowrite32(10, ioaddr + GPTimer);
1168 spin_unlock(&np->lock);
1174 printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
1175 dev->name, ioread32(ioaddr + IntrStatus));
1176 return IRQ_RETVAL(handled);
1179 /* This routine is logically part of the interrupt handler, but separated
1180 for clarity and better register allocation. */
1181 static int netdev_rx(struct net_device *dev)
1183 struct netdev_private *np = netdev_priv(dev);
1184 int entry = np->cur_rx % RX_RING_SIZE;
1185 int work_limit = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
1188 printk(KERN_DEBUG " In netdev_rx(), entry %d status %4.4x.\n",
1189 entry, np->rx_ring[entry].status);
1192 /* If EOP is set on the next entry, it's a new packet. Send it up. */
1193 while (--work_limit >= 0) {
1194 struct w840_rx_desc *desc = np->rx_head_desc;
1195 s32 status = desc->status;
1198 printk(KERN_DEBUG " netdev_rx() status was %8.8x.\n",
1202 if ((status & 0x38008300) != 0x0300) {
1203 if ((status & 0x38000300) != 0x0300) {
1204 /* Ingore earlier buffers. */
1205 if ((status & 0xffff) != 0x7fff) {
1206 printk(KERN_WARNING "%s: Oversized Ethernet frame spanned "
1207 "multiple buffers, entry %#x status %4.4x!\n",
1208 dev->name, np->cur_rx, status);
1209 np->stats.rx_length_errors++;
1211 } else if (status & 0x8000) {
1212 /* There was a fatal error. */
1214 printk(KERN_DEBUG "%s: Receive error, Rx status %8.8x.\n",
1216 np->stats.rx_errors++; /* end of a packet.*/
1217 if (status & 0x0890) np->stats.rx_length_errors++;
1218 if (status & 0x004C) np->stats.rx_frame_errors++;
1219 if (status & 0x0002) np->stats.rx_crc_errors++;
1222 struct sk_buff *skb;
1223 /* Omit the four octet CRC from the length. */
1224 int pkt_len = ((status >> 16) & 0x7ff) - 4;
1226 #ifndef final_version
1228 printk(KERN_DEBUG " netdev_rx() normal Rx pkt length %d"
1229 " status %x.\n", pkt_len, status);
1231 /* Check if the packet is long enough to accept without copying
1232 to a minimally-sized skbuff. */
1233 if (pkt_len < rx_copybreak
1234 && (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
1235 skb_reserve(skb, 2); /* 16 byte align the IP header */
1236 pci_dma_sync_single_for_cpu(np->pci_dev,np->rx_addr[entry],
1237 np->rx_skbuff[entry]->len,
1238 PCI_DMA_FROMDEVICE);
1239 skb_copy_to_linear_data(skb, np->rx_skbuff[entry]->data, pkt_len);
1240 skb_put(skb, pkt_len);
1241 pci_dma_sync_single_for_device(np->pci_dev,np->rx_addr[entry],
1242 np->rx_skbuff[entry]->len,
1243 PCI_DMA_FROMDEVICE);
1245 pci_unmap_single(np->pci_dev,np->rx_addr[entry],
1246 np->rx_skbuff[entry]->len,
1247 PCI_DMA_FROMDEVICE);
1248 skb_put(skb = np->rx_skbuff[entry], pkt_len);
1249 np->rx_skbuff[entry] = NULL;
1251 #ifndef final_version /* Remove after testing. */
1252 /* You will want this info for the initial debug. */
1254 printk(KERN_DEBUG " Rx data %pM %pM"
1255 " %2.2x%2.2x %d.%d.%d.%d.\n",
1256 &skb->data[0], &skb->data[6],
1257 skb->data[12], skb->data[13],
1258 skb->data[14], skb->data[15], skb->data[16], skb->data[17]);
1260 skb->protocol = eth_type_trans(skb, dev);
1262 np->stats.rx_packets++;
1263 np->stats.rx_bytes += pkt_len;
1265 entry = (++np->cur_rx) % RX_RING_SIZE;
1266 np->rx_head_desc = &np->rx_ring[entry];
1269 /* Refill the Rx ring buffers. */
1270 for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
1271 struct sk_buff *skb;
1272 entry = np->dirty_rx % RX_RING_SIZE;
1273 if (np->rx_skbuff[entry] == NULL) {
1274 skb = dev_alloc_skb(np->rx_buf_sz);
1275 np->rx_skbuff[entry] = skb;
1277 break; /* Better luck next round. */
1278 np->rx_addr[entry] = pci_map_single(np->pci_dev,
1280 np->rx_buf_sz, PCI_DMA_FROMDEVICE);
1281 np->rx_ring[entry].buffer1 = np->rx_addr[entry];
1284 np->rx_ring[entry].status = DescOwned;
1290 static void netdev_error(struct net_device *dev, int intr_status)
1292 struct netdev_private *np = netdev_priv(dev);
1293 void __iomem *ioaddr = np->base_addr;
1296 printk(KERN_DEBUG "%s: Abnormal event, %8.8x.\n",
1297 dev->name, intr_status);
1298 if (intr_status == 0xffffffff)
1300 spin_lock(&np->lock);
1301 if (intr_status & TxFIFOUnderflow) {
1303 /* Bump up the Tx threshold */
1305 /* This causes lots of dropped packets,
1306 * and under high load even tx_timeouts
1308 new = np->csr6 + 0x4000;
1310 new = (np->csr6 >> 14)&0x7f;
1314 new = 127; /* load full packet before starting */
1315 new = (np->csr6 & ~(0x7F << 14)) | (new<<14);
1317 printk(KERN_DEBUG "%s: Tx underflow, new csr6 %8.8x.\n",
1319 update_csr6(dev, new);
1321 if (intr_status & RxDied) { /* Missed a Rx frame. */
1322 np->stats.rx_errors++;
1324 if (intr_status & TimerInt) {
1325 /* Re-enable other interrupts. */
1326 if (netif_device_present(dev))
1327 iowrite32(0x1A0F5, ioaddr + IntrEnable);
1329 np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff;
1330 iowrite32(0, ioaddr + RxStartDemand);
1331 spin_unlock(&np->lock);
1334 static struct net_device_stats *get_stats(struct net_device *dev)
1336 struct netdev_private *np = netdev_priv(dev);
1337 void __iomem *ioaddr = np->base_addr;
1339 /* The chip only need report frame silently dropped. */
1340 spin_lock_irq(&np->lock);
1341 if (netif_running(dev) && netif_device_present(dev))
1342 np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff;
1343 spin_unlock_irq(&np->lock);
1349 static u32 __set_rx_mode(struct net_device *dev)
1351 struct netdev_private *np = netdev_priv(dev);
1352 void __iomem *ioaddr = np->base_addr;
1353 u32 mc_filter[2]; /* Multicast hash filter */
1356 if (dev->flags & IFF_PROMISC) { /* Set promiscuous. */
1357 memset(mc_filter, 0xff, sizeof(mc_filter));
1358 rx_mode = RxAcceptBroadcast | AcceptMulticast | RxAcceptAllPhys
1360 } else if ((dev->mc_count > multicast_filter_limit)
1361 || (dev->flags & IFF_ALLMULTI)) {
1362 /* Too many to match, or accept all multicasts. */
1363 memset(mc_filter, 0xff, sizeof(mc_filter));
1364 rx_mode = RxAcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1366 struct dev_mc_list *mclist;
1368 memset(mc_filter, 0, sizeof(mc_filter));
1369 for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
1370 i++, mclist = mclist->next) {
1371 int filterbit = (ether_crc(ETH_ALEN, mclist->dmi_addr) >> 26) ^ 0x3F;
1373 mc_filter[filterbit >> 5] |= 1 << (filterbit & 31);
1375 rx_mode = RxAcceptBroadcast | AcceptMulticast | AcceptMyPhys;
1377 iowrite32(mc_filter[0], ioaddr + MulticastFilter0);
1378 iowrite32(mc_filter[1], ioaddr + MulticastFilter1);
1382 static void set_rx_mode(struct net_device *dev)
1384 struct netdev_private *np = netdev_priv(dev);
1385 u32 rx_mode = __set_rx_mode(dev);
1386 spin_lock_irq(&np->lock);
1387 update_csr6(dev, (np->csr6 & ~0x00F8) | rx_mode);
1388 spin_unlock_irq(&np->lock);
1391 static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info)
1393 struct netdev_private *np = netdev_priv(dev);
1395 strcpy (info->driver, DRV_NAME);
1396 strcpy (info->version, DRV_VERSION);
1397 strcpy (info->bus_info, pci_name(np->pci_dev));
1400 static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1402 struct netdev_private *np = netdev_priv(dev);
1405 spin_lock_irq(&np->lock);
1406 rc = mii_ethtool_gset(&np->mii_if, cmd);
1407 spin_unlock_irq(&np->lock);
1412 static int netdev_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1414 struct netdev_private *np = netdev_priv(dev);
1417 spin_lock_irq(&np->lock);
1418 rc = mii_ethtool_sset(&np->mii_if, cmd);
1419 spin_unlock_irq(&np->lock);
1424 static int netdev_nway_reset(struct net_device *dev)
1426 struct netdev_private *np = netdev_priv(dev);
1427 return mii_nway_restart(&np->mii_if);
1430 static u32 netdev_get_link(struct net_device *dev)
1432 struct netdev_private *np = netdev_priv(dev);
1433 return mii_link_ok(&np->mii_if);
1436 static u32 netdev_get_msglevel(struct net_device *dev)
1441 static void netdev_set_msglevel(struct net_device *dev, u32 value)
1446 static const struct ethtool_ops netdev_ethtool_ops = {
1447 .get_drvinfo = netdev_get_drvinfo,
1448 .get_settings = netdev_get_settings,
1449 .set_settings = netdev_set_settings,
1450 .nway_reset = netdev_nway_reset,
1451 .get_link = netdev_get_link,
1452 .get_msglevel = netdev_get_msglevel,
1453 .set_msglevel = netdev_set_msglevel,
1456 static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1458 struct mii_ioctl_data *data = if_mii(rq);
1459 struct netdev_private *np = netdev_priv(dev);
1462 case SIOCGMIIPHY: /* Get address of MII PHY in use. */
1463 data->phy_id = ((struct netdev_private *)netdev_priv(dev))->phys[0] & 0x1f;
1466 case SIOCGMIIREG: /* Read MII PHY register. */
1467 spin_lock_irq(&np->lock);
1468 data->val_out = mdio_read(dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
1469 spin_unlock_irq(&np->lock);
1472 case SIOCSMIIREG: /* Write MII PHY register. */
1473 if (!capable(CAP_NET_ADMIN))
1475 spin_lock_irq(&np->lock);
1476 mdio_write(dev, data->phy_id & 0x1f, data->reg_num & 0x1f, data->val_in);
1477 spin_unlock_irq(&np->lock);
1484 static int netdev_close(struct net_device *dev)
1486 struct netdev_private *np = netdev_priv(dev);
1487 void __iomem *ioaddr = np->base_addr;
1489 netif_stop_queue(dev);
1492 printk(KERN_DEBUG "%s: Shutting down ethercard, status was %8.8x "
1493 "Config %8.8x.\n", dev->name, ioread32(ioaddr + IntrStatus),
1494 ioread32(ioaddr + NetworkConfig));
1495 printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d, Rx %d / %d.\n",
1496 dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
1499 /* Stop the chip's Tx and Rx processes. */
1500 spin_lock_irq(&np->lock);
1501 netif_device_detach(dev);
1502 update_csr6(dev, 0);
1503 iowrite32(0x0000, ioaddr + IntrEnable);
1504 spin_unlock_irq(&np->lock);
1506 free_irq(dev->irq, dev);
1508 netif_device_attach(dev);
1510 if (ioread32(ioaddr + NetworkConfig) != 0xffffffff)
1511 np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff;
1517 printk(KERN_DEBUG" Tx ring at %8.8x:\n",
1519 for (i = 0; i < TX_RING_SIZE; i++)
1520 printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x.\n",
1521 i, np->tx_ring[i].length,
1522 np->tx_ring[i].status, np->tx_ring[i].buffer1);
1523 printk("\n"KERN_DEBUG " Rx ring %8.8x:\n",
1525 for (i = 0; i < RX_RING_SIZE; i++) {
1526 printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
1527 i, np->rx_ring[i].length,
1528 np->rx_ring[i].status, np->rx_ring[i].buffer1);
1531 #endif /* __i386__ debugging only */
1533 del_timer_sync(&np->timer);
1535 free_rxtx_rings(np);
1541 static void __devexit w840_remove1 (struct pci_dev *pdev)
1543 struct net_device *dev = pci_get_drvdata(pdev);
1546 struct netdev_private *np = netdev_priv(dev);
1547 unregister_netdev(dev);
1548 pci_release_regions(pdev);
1549 pci_iounmap(pdev, np->base_addr);
1553 pci_set_drvdata(pdev, NULL);
1559 * suspend/resume synchronization:
1560 * - open, close, do_ioctl:
1561 * rtnl_lock, & netif_device_detach after the rtnl_unlock.
1563 * spin_lock_irq(np->lock), doesn't touch hw if not present
1565 * synchronize_irq + netif_tx_disable;
1567 * netif_device_detach + netif_tx_disable;
1568 * - set_multicast_list
1569 * netif_device_detach + netif_tx_disable;
1570 * - interrupt handler
1571 * doesn't touch hw if not present, synchronize_irq waits for
1572 * running instances of the interrupt handler.
1574 * Disabling hw requires clearing csr6 & IntrEnable.
1575 * update_csr6 & all function that write IntrEnable check netif_device_present
1576 * before settings any bits.
1578 * Detach must occur under spin_unlock_irq(), interrupts from a detached
1579 * device would cause an irq storm.
1581 static int w840_suspend (struct pci_dev *pdev, pm_message_t state)
1583 struct net_device *dev = pci_get_drvdata (pdev);
1584 struct netdev_private *np = netdev_priv(dev);
1585 void __iomem *ioaddr = np->base_addr;
1588 if (netif_running (dev)) {
1589 del_timer_sync(&np->timer);
1591 spin_lock_irq(&np->lock);
1592 netif_device_detach(dev);
1593 update_csr6(dev, 0);
1594 iowrite32(0, ioaddr + IntrEnable);
1595 spin_unlock_irq(&np->lock);
1597 synchronize_irq(dev->irq);
1598 netif_tx_disable(dev);
1600 np->stats.rx_missed_errors += ioread32(ioaddr + RxMissed) & 0xffff;
1602 /* no more hardware accesses behind this line. */
1605 if (ioread32(ioaddr + IntrEnable)) BUG();
1607 /* pci_power_off(pdev, -1); */
1609 free_rxtx_rings(np);
1611 netif_device_detach(dev);
1617 static int w840_resume (struct pci_dev *pdev)
1619 struct net_device *dev = pci_get_drvdata (pdev);
1620 struct netdev_private *np = netdev_priv(dev);
1624 if (netif_device_present(dev))
1625 goto out; /* device not suspended */
1626 if (netif_running(dev)) {
1627 if ((retval = pci_enable_device(pdev))) {
1629 "%s: pci_enable_device failed in resume\n",
1633 spin_lock_irq(&np->lock);
1634 iowrite32(1, np->base_addr+PCIBusCfg);
1635 ioread32(np->base_addr+PCIBusCfg);
1637 netif_device_attach(dev);
1638 init_rxtx_rings(dev);
1639 init_registers(dev);
1640 spin_unlock_irq(&np->lock);
1642 netif_wake_queue(dev);
1644 mod_timer(&np->timer, jiffies + 1*HZ);
1646 netif_device_attach(dev);
1654 static struct pci_driver w840_driver = {
1656 .id_table = w840_pci_tbl,
1657 .probe = w840_probe1,
1658 .remove = __devexit_p(w840_remove1),
1660 .suspend = w840_suspend,
1661 .resume = w840_resume,
1665 static int __init w840_init(void)
1668 return pci_register_driver(&w840_driver);
1671 static void __exit w840_exit(void)
1673 pci_unregister_driver(&w840_driver);
1676 module_init(w840_init);
1677 module_exit(w840_exit);